US20140026320A1 - Climate controlled beds and methods of operating the same - Google Patents
Climate controlled beds and methods of operating the same Download PDFInfo
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- US20140026320A1 US20140026320A1 US13/848,620 US201313848620A US2014026320A1 US 20140026320 A1 US20140026320 A1 US 20140026320A1 US 201313848620 A US201313848620 A US 201313848620A US 2014026320 A1 US2014026320 A1 US 2014026320A1
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- air
- assembly
- blower
- temperature
- user
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/62—Accessories for chairs
- A47C7/72—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like
- A47C7/74—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C21/00—Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
- A47C21/04—Devices for ventilating, cooling or heating
- A47C21/042—Devices for ventilating, cooling or heating for ventilating or cooling
- A47C21/044—Devices for ventilating, cooling or heating for ventilating or cooling with active means, e.g. by using air blowers or liquid pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00285—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for vehicle seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00742—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/022—Air heaters with forced circulation using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/003—Component temperature regulation using an air flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
- F25B2321/021—Control thereof
- F25B2321/0211—Control thereof of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
- F25B2321/021—Control thereof
- F25B2321/0212—Control thereof of electric power, current or voltage
Definitions
- This application relates generally to climate control systems, and more specifically, to operational schemes for climate controlled seats, beds or the like.
- Temperature modified air for environmental control of living or working space is typically provided to relatively extensive areas, such as entire buildings, selected offices, or suites of rooms within a building.
- the entire vehicle In the case of vehicles, such as automobiles, the entire vehicle is typically cooled or heated as a unit.
- more selective or restrictive air temperature modification is desirable.
- an automotive vehicle exposed to the summer weather where the vehicle has been parked in an unshaded area for a long period of time, can cause the vehicle seat to be very hot and uncomfortable for the occupant for some time after entering and using the vehicle, even with normal air conditioning.
- the seat occupant's back and other pressure points may remain sweaty while seated.
- climate control systems typically include a blower which distributes ambient air or other fluid past air conditioning devices (e.g., TEDs). The conditioned air can then be delivered to certain desired locations of the seat, bed or other assembly.
- air conditioning devices e.g., TEDs
- one aspect of the present inventions comprises a climate controlled seat assembly configured to receive a user.
- the seat assembly includes at least one blower, two or more thermoelectric devices in fluid communication with the blower, an air distribution device downstream of each thermoelectric device and a control system configured to operate the thermoelectric devices according to a desired control scheme.
- the control scheme is configured to selectively activate or deactivate the thermoelectric devices while the blower continuously delivers a volume of air to the thermoelectric devices.
- the seat assembly includes a seating device, a bed or another device configured to receive one or more users.
- the control scheme is configured to have only a one thermoelectric device activated at a time. In yet other aspects, the control scheme is configured to have at least two thermoelectric device activated at a time.
- control system comprises a control module.
- control scheme is based at least in part on a pre-programmed time sequence.
- control scheme is based at least in part on a user-selected mode of operation.
- the user-selected mode of operation includes a plurality of temperature settings.
- the user-selected mode of operation comprises a desired temperature value.
- the assembly further comprises a user-interface device, which is configured to allow a user to select a mode of operation.
- the user interface device includes a button, a knob, a keypad or the like.
- the control scheme is based at least in part on a reading from at least one sensor.
- the sensor comprises a temperature sensor.
- the temperature sensor is configured to detect the temperature of a volume of air downstream of the thermoelectric device.
- the sensor comprises a pressure sensor, which is configured to recognize when a user is positioned on a portion of the seat assembly.
- a method of delivering conditioned air to a climate controlled item of furniture includes delivering a volume of air into a fluid conduit using a blower, distributing the volume of air to at least two branches and conveying a volume of air directed into each branch through a thermoelectric device.
- the method further comprises delivering the volume of air from the thermoelectric device to a user situated on the furniture through a fluid distribution device and activating or deactivating the thermoelectric device to regulate the temperature of air entering the fluid distribution device.
- the item of furniture is a bed, seating device or the like.
- the step of delivering a volume of air into a fluid conduit using a blower is substantially continuous.
- the method further comprises measuring the temperature of air exiting the thermoelectric device.
- the step of activating or deactivating the thermoelectric device is at least partially regulated by the measured temperature of the air exiting the thermoelectric device.
- FIG. 1 is a schematic illustration of a climate control system that is configured in accordance with one embodiment
- FIG. 2A is a schematic illustration of a control scheme for a climate control system according to a first embodiment
- FIG. 2B is a schematic illustration of a control scheme for a climate control system according to a second embodiment
- FIG. 2C is a schematic illustration of a control scheme for a climate control system according to a third embodiment
- FIG. 2D is a schematic illustration of a control scheme for a climate control system according to a fourth embodiment
- FIG. 3A is a schematic illustration of a climate control system for a bed which is configured according to one embodiment
- FIG. 3B is detailed view of a portion of the illustrated of FIG. 3A ;
- FIG. 4 illustrates a top view of a climate controlled bed with the vast majority of a top member removed in accordance with one embodiment
- FIG. 5 illustrates a top view of a climate controlled bed with the vast majority of a top member removed in accordance with another embodiment
- FIG. 6 is a schematic illustration on another embodiment of a climate controlled bed.
- FIG. 1 schematically illustrates one embodiment of a climate control system 10 .
- the depicted climate control system 10 is particularly well suited to be used in a seat or bed assembly.
- the climate control features described herein may be incorporated into other types of assemblies and systems.
- the control system can be used in office chairs, recliner chairs, sofas, beds, automobile seats, airplane seats, stadium seats, benches and the like.
- the climate control system 10 of the seat assembly comprises a plurality of thermoelectric devices (TEDs) 20 (or other types of fluid modules) and air distribution devices 40 .
- TEDs thermoelectric devices
- one or more blowers 50 or other air transfer devices are configured to deliver air to the air distribution devices 40 via the TEDs 20 or other fluid modules.
- the fluid modules 20 comprise thermoelectric devices (TEDs) that are configured to temperature condition (i.e. to selectively heat or cool) the air or other fluid flowing through them.
- a preferred thermoelectric device can be a Peltier thermoelectric module.
- the TED schematically illustrated in FIG. 1 can include a main heat exchanger for transferring or removing thermal energy from the fluid flowing through TED 20 or other type of fluid module and to any downstream distribution systems.
- the TED 20 can also include a secondary heat exchanger that extends from the TED 20 generally opposite the main heat exchanger.
- the TED 20 can be configured to cool the main heat exchanger when electrical current is applied to the TED 20 in a first direction.
- the TED 20 is configured to heat the secondary heat exchanger, thereby transferring heat to the air or other fluid passing in the vicinity of the secondary heat exchanger.
- the extent of heating and/or cooling can be regulated by controlling the amount of electrical current being delivered to each TED 20 .
- a fluid module e.g., TED
- the TED can be eliminated or turned off. In such embodiments, a cooling effect ban be provided by blowing ambient air through the distribution system and to the occupant.
- a blower 50 is preferably configured to deliver a volume of air through a main header 80 . From the main header 80 , air can then be distributed to one or more branches 82 . In the illustrated embodiment, the air from the main header 80 is divided into three branches 82 , each of which delivers a volume of air past a TED 20 or other fluid module. It will be appreciated that a climate control system can have more or fewer branches 82 and/or headers.
- the blower 50 or other air delivery device can comprise an electrical fan or blower, such as, for example, an axial blower and/or radial fan.
- a single pumping device 50 is used to deliver air to both the main and waste heat exchangers. However, in other embodiments, separate pumping devices can be used to deliver air to the main and waste heat exchangers.
- air flowing past the main heat exchanger portion of each TED 20 is discharged into a main discharge conduit 84 .
- this conditioned air is then routed to one or more air distribution devices 40 where it is distributed through a plurality of orifices or other openings.
- air distribution devices 40 can be placed immediately adjacent to a chair or bed assembly surface 14 or other user-interface surface.
- one or more intermediate layers or devices can be situated between the air distribution device 40 and user-interface surface 14 .
- air flowing through a secondary or waste heat exchanger is routed into separate secondary or waste discharge conduits 88 .
- the secondary discharge conduits 88 are configured so as to be in hydraulic communication with one another. Therefore, a single collection header (not shown) can be used to collect and remove the secondary or waste air stream to a desired location.
- the TEDs 20 illustrated in FIG. 1 are configured to cool (e.g., remove heat) the air flowing past the main heat exchanger and towards the air distribution devices 40 .
- air flowing past the secondary or waste heat exchangers is warmer than the air entering the TEDs 20 .
- one, some or all of the TEDs 20 can be configured to warm air flowing through the main heat exchanger and cool air flowing through the secondary or waste heat exchangers.
- a climate control system can be configured so that some TEDs 20 deliver cooler air and some deliver warmer air to air distribution devices 40 .
- the climate control system is configured to permit a user to easily modify whether warmer or cooler air is delivered to the air distribution devices 40 .
- the TEDs 20 described herein represent only one exemplary embodiment of devices that can be used to condition the air or other fluid supplied by a blower 50 .
- any of a variety of differently configured fluid modules or other devices may be used to condition a volume of fluid.
- Other examples of fluid modules that may be used are described in U.S. Pat. No. 6,223,539, 6,119,463, 5,524,439 or 5,626,021, which are hereby incorporated by reference in their entirety.
- Another example of such a fluid module is currently sold under the trademark Micro-Thermal ModuleTM by Amerigon Inc.
- the TED 20 or other fluid module can share one or more components (e.g., blowers, pumping devices, TEDs, etc.) with the vehicles general climate control system.
- climate control systems can be advantageously configured and/or controlled to reduce capital and/or energy costs.
- the climate control system 10 can include fewer blowers 50 or other air transfer devices.
- the climate control system can be operated according to one or more control routines which are adapted to reduce energy consumption.
- energy and cost saving measures can be implemented while maintaining or improving the performance of the climate control system 10 .
- climate control systems 10 can be used in a variety of user-interface apparatuses, such as, for example, beds (e.g., normal spring beds, select comfort beds, hospital beds, reclining beds, etc.), chairs (e.g., office chairs, task chairs, recliners, etc.), other seating assemblies, sofas, airplane seats, train seats or the like.
- beds e.g., normal spring beds, select comfort beds, hospital beds, reclining beds, etc.
- chairs e.g., office chairs, task chairs, recliners, etc.
- other seating assemblies e.g., sofas, airplane seats, train seats or the like.
- the energy consumption of the control system can be reduced by advantageously controlling the operation of one or more of the TEDs 20 or other fluid modules 20 .
- the TEDs 20 which are electrically operated, can be turned on or off according to an energy-reducing control scheme.
- the electrical current delivered to one or more TEDs 20 is modulated to achieve a desired level of cooling and/or heating for the air passing therethrough.
- the blower 50 or other air transfer device is configured to continuously operate as fluid modules 20 are turned on/off or modulated.
- the blower 50 can be configured to turn on or off during the operation of the climate control system 10 .
- the amount of air being delivered to the blower 50 can be varied by controlling the speed of the blower, by modulating one or more valves or by some other method.
- FIG. 2A schematically illustrates one embodiment of a scheme 200 A for controlling the operation of the various components of a climate control system, including TEDs, other fluid modules, blowers and the like over a particular time period.
- the control system includes three TEDs 120 and one blower 150 .
- the TEDs 120 can either be turned on or off.
- the blower 150 can be operated at any one of a plurality of operational levels.
- the blower can be configured to operate at a constant speed (e.g., on/off operation).
- the shaded regions indicate that the particular device is operating (or, in the case of a device capable of variable operational levels, the level at which the device is operating) and the white regions indicate that the particular device is not operating.
- TED No. 1 is activated and TED Nos. 2 and 3 are deactivated.
- the blower 150 is delivering air to the climate control system at a relatively low rate (schematically represented by level 212 ).
- blower 150 is configured to deliver the maximum volume of air through the control system (schematically represented by operational level 214 ).
- TED Nos. 2 and 3 are configured to remain activated, and TED No. 1 is configured to be deactivated during the subsequent time period 254 .
- the blower 214 continues to operate at the same level 214 as it did in the previous time interval 252 .
- the operation of the TEDs 120 and the blower 150 can be varied from one time interval to the next.
- the operational characteristics of the TEDs 120 and/or the blower 150 can be modified (e.g., on/off, speed variation, etc.) in accordance with one or more desired control schemes.
- the blower can continue to deliver air or other fluid past the TEDs 20 or other fluid modules even when the TEDs 20 are not activated (e.g., not electrically energized). Under such circumstances, fluid distributed through a fluid distribution device 40 may not be temperature conditioned (e.g., cooled or heated) if upstream TEDs 20 are deactivated. In other embodiments, the electrical current supplied to the TEDs 20 can be modulated, either in addition to or in lieu of simple TED activation/deactivation, in order to vary the extent to which air or other fluid is temperature conditioned.
- both the flow rate and the temperature of a fluid discharged from a fluid distribution device 40 can fluctuate, as TEDs 20 are activated/deactivated and the blower's capacity is modified.
- blowers 50 or other fluid delivery devices are configured for adjustable operation.
- capital costs and overall complexity of a climate control system can be reduced by utilizing a common header to deliver air or other fluid from a blower 50 to multiple fluid modules 20 (e.g., 20 ), as illustrated in the embodiment of FIG. 1 . As a result, fewer blowers 50 , electrical connections and the like may be needed.
- FIG. 2B illustrates another embodiment of a scheme 200 B for controlling the operation of a climate control system.
- the TEDs 120 are configured to turn on or off so that only a single TED 120 is operating at a time.
- the operational scheme can be configured so that two or more TEDs 120 operate simultaneously.
- the TEDs 120 are configured to be switched on and off in a sequential, orderly pattern.
- the order in which TEDs 120 are activated and deactivated can vary.
- TEDs 120 can be operated in accordance with a more random pattern.
- the blower 150 is configured to operate at a constant operating level 230 (e.g., speed, output, etc.).
- a constant operating level 230 e.g., speed, output, etc.
- the amount of air or other fluid being delivered to each TED 120 , and consequently to each downstream fluid distribution device can remain substantially constant. This can help provide a consistent feel and comfort level to users of climate control seating assemblies (e.g., chairs, beds, etc.), as the flow rate of air being discharged from a particular surface or user-interface location does not fluctuate.
- climate control seating assemblies e.g., chairs, beds, etc.
- the temperature of the discharged air or other fluid will vary.
- schemes regulating the operation of the TEDs 120 and the blower 40 advantageously maintain a desired cooling or warming effect for the climate controlled seating assembly, while simultaneously reducing unnecessary energy consumption.
- This can help maintain a generally consistent power consumption rate during the operation of the TEDs 120 , the blower 40 and any other components of a temperature conditioning system.
- Such a consistent power consumption rate can eliminate undesirable and potentially harmful spikes during the delivery of electrical energy.
- schemes can help maintain thermal inertia by allowing the temperature conditioning system to more quickly respond to desired temperature variations.
- the fairly constant volumetric delivery of conditioned and/or unconditioned air helps provide a more consistent feel to the occupant. Thus, the occupant is less likely to be disturbed or otherwise affected by a modulating flow rate and all the noticeable changes that accompany it (e.g., variations in sounds, feel, etc.).
- the control scheme 200 C is configured to sequence the TEDs 120 between activated and deactivated positions similarly to the embodiment of FIG. 2B .
- the control scheme 200 C varies the operation (e.g., speed, flowrate, etc.) of the blower 150 .
- the operation of the blower 150 follows a substantially sinusoidal pattern over time.
- the operation of the blower 150 can fluctuate in one or more other manners.
- the speed and/or output of the blower 150 can follow a linear, non-linear, random, step-like or any other type of pattern.
- the blower 150 can be controlled in response to one or more sensor measurements, an input from a user, a preprogrammed schedule, a mode change and/or the like.
- the energy supplied to each TED can be varied according to a sinusoidal or other type of pattern (e.g., linear, non-linear, random, etc.).
- the control scheme is configured to vary the energy (e.g., voltage) supplied to the TEDs according to a particular timing offset, the total amount of energy consumed by the TEDs can remain at a substantially constant level 270 over time. It will be appreciated that in other embodiments the total energy consumption of the TEDs can vary with time.
- the operational scheme used to control the TEDs, blower and/or other components of a climate control system is based on a preprogrammed sequence.
- the TEDs and blower can be configured to follow a particular time-based operational schedule, such as in the embodiments illustrated in FIGS. 2A-2D and discussed herein. Therefore, once such a sequence is activated, a climate control system can follow a predetermined pattern in which the operation of the TEDs and/or blowers is modified.
- a time-activated sequence is initiated and/or terminated by the pressing of a button or turning of a knob.
- one or more other methods of initiating such operational sequences can also be used. For example, the sequence can be commenced by manipulating a lever or by entering a command on using a keypad, keyboard, touch screen or other controller.
- an operational sequence is configured to automatically begin and/or end based on the time of day, a timer (e.g., elapsed time from a particular event or occurrence) or the like.
- a particular operational scheme can be activated and/or deactivated using feedback received from one or more sensors.
- a temperature sensor, humidity or dew point sensor, condensation sensor, motion sensor, pressure sensor or the like can be used to detect the presence of an individual on or near a climate controlled seat assembly (e.g., chair, bed, etc.).
- a humidity sensor can adjust the operating parameters to avoid condensation in the TEDs during humid conditions.
- a condensation sensor can be used to adjust the operating parameters if condensation is detected.
- the climate controlled seating assembly can be configured to function under two or more operational modes.
- a climate controlled chair or bed can permit a user to select a level of cooling and/or heating (e.g., “Low-Medium-High”, “1-2-3-4-5”, etc.).
- seating assemblies can be configured with climate control systems that allow user to enter an actual temperature.
- users can select a desired setting, temperature and/or other operational mode using a knob, lever, switch, keypad or the like.
- users are permitted to program an operational scheme for a climate controlled seating assembly that satisfies their unique preferences and/or requirements.
- control of the TEDs, blower and/or other components of the climate control system can be based, at least partially, on feedback received from one or more sensors.
- a climate controlled seat, bed or the like can include one or more thermal sensors, optical sensors, motion sensors, audible sensors, pressure sensors and/or the like.
- such sensors can be positioned on or near the climate controlled seat assembly to determine whether cooling and/or heating of the assembly is required or desired.
- thermal sensors can help determine if the temperature at a surface of the seat assembly is above or below a desired level.
- one or more thermal sensors can be positioned in or near a TED or fluid conduit to detect the temperature of the discharged fluid.
- temperature sensor can be sued to detect the ambient temperature and the control system can be configured to activate the TEDs and/or blowers if the ambient temperature drops or rises below a predetermined temperature and/or a temperature setting determined by the user.
- pressure sensors can be configured to detect when a user has been in contact with a surface of a seat, bed or the like for a prolonged time period. Depending on their type, sensors can contact a portion of the seating assembly. In some embodiments, a sensor is located within and/or on the surface of the seating assembly. However, in other arrangements, the sensors are configured so they do not contact the seating assembly.
- a control module is used to control the operation of the TEDs, blowers and/or other system components.
- a control module can be configured to execute a desired operational scheme as described herein.
- the control module can be configured to activate, deactivate and/or modulate the TEDs, blowers and the like.
- the control module can include connections to one or more sensors, user-interface devices (e.g., knobs, buttons, or other mode selection devices, keypads, etc.), timers and any other devices that are desirable or necessary for the proper execution of a particular operational scheme.
- the control module can be adapted to cooperate and communicate with one or more other control systems, such as, for example, an automotive control panel or the like. Thus, a user can select a desired mode of operation directly from a car's dashboard or other instrument panel.
- FIGS. 3A and 3B schematically illustrate one embodiment of a climate controlled bed 310 equipped with a control scheme as described herein.
- the climate controlled bed 310 comprises a single blower 350 and three TEDs 320 .
- the bed 310 can include more or fewer blowers 350 and TEDs 320 , as desired.
- the climate controlled bed 310 is configured so that the blower 350 , the TEDs 320 , conduits 380 , 382 , 388 , the control module (not shown) and any other components of the climate control system are conveniently positioned underneath the mattress, pad or other member on which users can be positioned.
- the bed 310 preferably comprises an power source (e.g., power cord, battery, etc.) from which the various components (e.g., blower 350 , TEDs 320 , control module, etc.) can be electrically energized.
- an power source e.g., power cord, battery, etc.
- the various components e.g., blower 350 , TEDs 320 , control module, etc.
- the blower 350 can be configured to draw a volume of ambient air or other fluid and discharge it into a main discharge header 380 .
- the bed 310 can include one or more openings 390 to permit fluid to enter the bed interior 316 .
- the main header 380 and/or the distribution branches 382 can include valves and/or other regulation devices to selective control the fluid flowrate and/or pressure to each TED 320 and fluid distribution device 340 .
- air or other fluid diverted into each distribution branch 382 enters a TED 320 or other type of fluid conditioning module.
- fluid flowing through the TEDs 320 enters either a main discharge conduit 384 or a secondary discharge conduit 388 .
- the TED 320 can be configured to either cool or heat the air entering the main discharge conduit 384 .
- the air exiting into the main discharge conduit 384 will be approximately at the same temperature as the ambient air entering the blower.
- whether a TED is activated or deactivated can depend on the particular operational scheme being used by the climate control system.
- air or other fluid directed into the main discharge conduit 384 can enter into a fluid distribution device 340 , regardless of whether or not it was actually conditioned by a TED 320 .
- the fluid distribution device 340 comprises a plurality of openings 342 through which the air or other fluid exits.
- air or other fluid discharged from the air distribution device 340 can contact and diffuse through a mattress 314 , pad or other member.
- a mattress 314 , pad or other member can be configured to permit fluid discharged from the fluid distribution devices 340 to reach one or more of its exposed surfaces 312 .
- air or fluid discharged from the TED 320 into the secondary discharge conduit 388 can be collected into a common header and expelled from the bed 310 through one or more outlets 394 .
- a control scheme as described herein can be advantageously used to manage the operation of the three TEDs 320 and blower 350 depicted in FIGS. 3A and 3B .
- an operational scheme can be configured to sequence the TEDs 320 between activated and deactivated positions in order to reduce energy consumption.
- the operational scheme is capable of modulating the TEDs 320 between minimum and maximum levels.
- the control scheme can modulate the flowrate, speed and/or discharge pressure of the blower 350 within a desired range.
- the climate controlled bed 310 includes a switch, keypad or other user-interface device (not shown) to allow a user to adjust the target temperature, the mode of operation and/or any other setting related to the climate control system. Further, the bed 310 can include one or more sensors that can further enhance the function of the climate control system under certain operational schemes, as described above.
- the bed 310 can include a temperature sensor positioned near the TEDs 310 , within the distribution devices 340 and/or near the support surface of the mattress 314 .
- a closed loop control routine can be provided for regulating the temperature of the air provided by the TEDs to a predetermined and/or user selected temperature.
- the closed loop control routine can be configured to regulate the temperature of the air provided by the TED in response to measure of the ambient temperature.
- the control system can be configured to deactivate the blower and/or the TEDs after a user selected or predetermined amount of time.
- FIGS. 4 and 5 illustrate two different embodiments of climate-controlled beds having distinct zones or sections.
- Such schemes can provide enhanced cooling and/or heating control to certain portions of the bed. Consequently, a user can customize a temperature-conditioning effect to his or her liking. For example, a user can choose to provide more or less cooling or heating to a particular zone or section. Further, such embodiments permit each occupant (e.g., in a dual occupant bed) of a single bed to select a desired level of cooling and/or heating.
- the illustrated bed 110 includes six different cooling and/or heating zones 412 A-F.
- Each zone 412 A-F includes its own flow thermoelectric device (not shown) such that each distribution system can be associated with its own thermoelectric device.
- each flow distribution system 470 A-F can be configured to receive conditioned (e.g., heated and/or cooled) or unconditioned (e.g., ambient) air or other fluid from one or more fluid transfer devices (not shown).
- the air or other fluid delivered by the fluid transfer devices can be routed through, past or in the vicinity of one or more thermoelectric devices to selectively temperature condition the air or other fluid.
- the distribution system 470 A-F used in each zone 412 A-F is substantially identical in size and shape.
- the shape, size, air distribution effect and/or characteristics of the distribution systems 470 A-F used within a particular bed 110 can vary, as desired or required by a particular application.
- the flow distribution systems 470 A-F are generally positioned where the bed's occupants are most likely to be situated.
- the number, shape, size, spacing, location and other characteristics of the flow conditioning members 470 A-F can vary depending on the size of the bed, the number of occupants it is intended to hold and/or the like.
- the embodiment of the climate-controlled bed 210 illustrated in FIG. 5 includes only four cooling and/or heating zones 512 A-D. As shown, each zone comprises a flow distribution member 570 A-D. However, unlike the flow distribution members 470 A-F discussed and illustrated with reference to FIG. 4 , these flow distribution members 570 A-D vary from zone to zone. For example, the flow conditioning members 570 A, 570 B located in zones 512 A, 512 B on one end of the bed 510 are larger in surface area than the flow conditioning members 570 C, 570 D in the other two zones 512 C, 512 D. As discussed, such a scheme can be used when a higher volume of conditioned fluid is desired in selected zones (e.g., 512 A and 512 B). Flow distribution members 570 A, 570 B that require additional volumetric flow and/or better temperature-conditioning abilities can be supplied by additional fluid transfer devices and/or thermoelectric devices.
- FIG. 6 illustrates another embodiment of a climate controlled bed 600 .
- the bed 600 includes a first side 602 and a second side 604 .
- Each side of the bed can be associated with a set of thermoelectric devices 606 , 608 .
- more or less than two thermoelectric devices can be associated with each zone.
- Air can be supplied to the thermoelectric devices through a distribution header and then from the thermoelectric devices through a distribution system and air permeable pad as described above.
- each side 602 , 604 of the bed has a separate distribution system.
- thermoelectric devices 606 , 608 can be operatively coupled to a control module 610 , which can also be operatively coupled to a blower (not shown)
- the control module 610 can in turn be operatively coupled to a first and second input device 612 , 614 .
- a user can input a temperature or conditioning setting for each side of the bed 600 using the input devices 612 .
- the input devices 612 can be combined into a single device with, for example, different modes.
- control module 610 is configured for open loop operation which based upon the settings from the input devices the control module 610 operates the TEDs 606 , 608 and/or blowers according to a predetermined setting or control routine.
- temperature sensors 616 can be provided for detecting the temperature of the air delivered by the TEDs 606 , 608 and/or ambient temperature. In such embodiments, the temperature measured by the sensors 616 can be used as a fail safe and/or as part of a closed loop control routine.
- the control module 610 can be configured to shut off the TEDs and/or blowers after a predetermined amount of time and/or after an amount of time inputted by the user through the input devices 612 , 614 .
- FIG. 6 also illustrates a power supply 618 that can be coupled to the control module.
- a single box or housing 620 contains the power supply 618 and the control module 610 .
- various components are described as being “coupled” together or “operatively coupled” together. It is to be understand that these are intended to be broad terms that includes components that are directly or indirectly connected to each other and/or connected to each other through one or more intermediate members.
- the components can be electrically connected directly or indirectly through intermediate components and/or wirelessly (e.g., through IR or other wireless transmission devices.
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Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 13/210,110, filed Aug. 15, 2011, which is a continuation of U.S. patent application Ser. No. 13/018,167, filed Jan. 31, 2011 and issued as U.S. Pat. No. 7,996,936 on Aug. 16, 2011, which is a continuation of U.S. patent application Ser. No. 12/208,254, filed Sep. 10, 2008 and issued as U.S. Pat. No. 7,877,827 on Feb. 1, 2011, which claims the priority benefit under 35 U.S.C. §119(e) of U.S. Provisional Application No. 60/971,220, filed Sep. 10, 2007. The entire contents of all of the foregoing applications are hereby incorporated by reference herein.
- 1. Field of the Invention
- This application relates generally to climate control systems, and more specifically, to operational schemes for climate controlled seats, beds or the like.
- 2. Description of the Related Art
- Temperature modified air for environmental control of living or working space is typically provided to relatively extensive areas, such as entire buildings, selected offices, or suites of rooms within a building. In the case of vehicles, such as automobiles, the entire vehicle is typically cooled or heated as a unit. There are many situations, however, in which more selective or restrictive air temperature modification is desirable. For example, it is often desirable to provide an individualized climate control for an occupant seat so that substantially instantaneous heating or cooling can be achieved. For example, an automotive vehicle exposed to the summer weather, where the vehicle has been parked in an unshaded area for a long period of time, can cause the vehicle seat to be very hot and uncomfortable for the occupant for some time after entering and using the vehicle, even with normal air conditioning. Furthermore, even with normal air-conditioning, on a hot day, the seat occupant's back and other pressure points may remain sweaty while seated. In the winter time, it is highly desirable to have the ability to quickly warm the seat of the occupant to facilitate the occupant's comfort, especially where the normal vehicle heater is unlikely to warm the vehicle's interior as quickly.
- For such reasons, there exist various types of individualized climate control systems for seats, beds and other similar assemblies. Such climate control systems typically include a blower which distributes ambient air or other fluid past air conditioning devices (e.g., TEDs). The conditioned air can then be delivered to certain desired locations of the seat, bed or other assembly. In order to reduce energy consumption while still maintaining user comfort, it is desirable to operate the climate control system according to one or more control schemes.
- Accordingly, one aspect of the present inventions comprises a climate controlled seat assembly configured to receive a user. The seat assembly includes at least one blower, two or more thermoelectric devices in fluid communication with the blower, an air distribution device downstream of each thermoelectric device and a control system configured to operate the thermoelectric devices according to a desired control scheme. In one embodiment, the control scheme is configured to selectively activate or deactivate the thermoelectric devices while the blower continuously delivers a volume of air to the thermoelectric devices.
- According to other embodiments, the seat assembly includes a seating device, a bed or another device configured to receive one or more users. In another embodiment, the control scheme is configured to have only a one thermoelectric device activated at a time. In yet other aspects, the control scheme is configured to have at least two thermoelectric device activated at a time.
- In some embodiments, the control system comprises a control module. In other embodiments, the control scheme is based at least in part on a pre-programmed time sequence. In yet other embodiments, the control scheme is based at least in part on a user-selected mode of operation. According to other aspect of the present invention, the user-selected mode of operation includes a plurality of temperature settings. In some embodiments, the user-selected mode of operation comprises a desired temperature value. In still other arrangements, the assembly further comprises a user-interface device, which is configured to allow a user to select a mode of operation. In several embodiments, the user interface device includes a button, a knob, a keypad or the like.
- In one embodiment, the control scheme is based at least in part on a reading from at least one sensor. In other embodiments, the sensor comprises a temperature sensor. In some aspects of the present invention, the temperature sensor is configured to detect the temperature of a volume of air downstream of the thermoelectric device. In still other embodiments, the sensor comprises a pressure sensor, which is configured to recognize when a user is positioned on a portion of the seat assembly.
- According to other embodiments, a method of delivering conditioned air to a climate controlled item of furniture includes delivering a volume of air into a fluid conduit using a blower, distributing the volume of air to at least two branches and conveying a volume of air directed into each branch through a thermoelectric device. The method further comprises delivering the volume of air from the thermoelectric device to a user situated on the furniture through a fluid distribution device and activating or deactivating the thermoelectric device to regulate the temperature of air entering the fluid distribution device.
- In accordance with some embodiments, the item of furniture is a bed, seating device or the like. In other embodiments, the step of delivering a volume of air into a fluid conduit using a blower is substantially continuous. In another embodiment, the method further comprises measuring the temperature of air exiting the thermoelectric device. In still other embodiments, the step of activating or deactivating the thermoelectric device is at least partially regulated by the measured temperature of the air exiting the thermoelectric device.
- These and other features, aspects and advantages of the present inventions are described with reference to drawings of certain preferred embodiments, which are intended to illustrate, but not to limit, the present invention. The drawings include seven (7) figures. It is to be understood that the attached drawings are for the purpose of illustrating concepts of the present inventions and may not be to scale.
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FIG. 1 is a schematic illustration of a climate control system that is configured in accordance with one embodiment; -
FIG. 2A is a schematic illustration of a control scheme for a climate control system according to a first embodiment; -
FIG. 2B is a schematic illustration of a control scheme for a climate control system according to a second embodiment; -
FIG. 2C is a schematic illustration of a control scheme for a climate control system according to a third embodiment; -
FIG. 2D is a schematic illustration of a control scheme for a climate control system according to a fourth embodiment; -
FIG. 3A is a schematic illustration of a climate control system for a bed which is configured according to one embodiment; -
FIG. 3B is detailed view of a portion of the illustrated ofFIG. 3A ; -
FIG. 4 illustrates a top view of a climate controlled bed with the vast majority of a top member removed in accordance with one embodiment; -
FIG. 5 illustrates a top view of a climate controlled bed with the vast majority of a top member removed in accordance with another embodiment; and -
FIG. 6 is a schematic illustration on another embodiment of a climate controlled bed. -
FIG. 1 schematically illustrates one embodiment of aclimate control system 10. The depictedclimate control system 10 is particularly well suited to be used in a seat or bed assembly. However, it will be appreciated that the climate control features described herein may be incorporated into other types of assemblies and systems. For example, the control system can be used in office chairs, recliner chairs, sofas, beds, automobile seats, airplane seats, stadium seats, benches and the like. - With continued reference to
FIG. 1 , theclimate control system 10 of the seat assembly comprises a plurality of thermoelectric devices (TEDs) 20 (or other types of fluid modules) andair distribution devices 40. As described herein, one ormore blowers 50 or other air transfer devices are configured to deliver air to theair distribution devices 40 via theTEDs 20 or other fluid modules. - In some embodiments, the
fluid modules 20 comprise thermoelectric devices (TEDs) that are configured to temperature condition (i.e. to selectively heat or cool) the air or other fluid flowing through them. A preferred thermoelectric device can be a Peltier thermoelectric module. The TED schematically illustrated inFIG. 1 can include a main heat exchanger for transferring or removing thermal energy from the fluid flowing throughTED 20 or other type of fluid module and to any downstream distribution systems. Preferably, theTED 20 can also include a secondary heat exchanger that extends from theTED 20 generally opposite the main heat exchanger. In one embodiment, theTED 20 can be configured to cool the main heat exchanger when electrical current is applied to theTED 20 in a first direction. Thus, transferring heat away from the air or other fluid passing in the vicinity of the main heat exchanger. In such an embodiment, theTED 20 is configured to heat the secondary heat exchanger, thereby transferring heat to the air or other fluid passing in the vicinity of the secondary heat exchanger. However, it should be appreciated that if the electrical current is reversed, the main heat exchanger will be heated and the secondary heat exchanger will be cooled. In addition, the extent of heating and/or cooling can be regulated by controlling the amount of electrical current being delivered to eachTED 20. Thus, in some embodiments, a fluid module (e.g., TED) can be used to selectively heat and/or cool a volume of air flowing past it. It should also be appreciated in some embodiments described herein the TED can be eliminated or turned off. In such embodiments, a cooling effect ban be provided by blowing ambient air through the distribution system and to the occupant. - As illustrated, a
blower 50 is preferably configured to deliver a volume of air through amain header 80. From themain header 80, air can then be distributed to one ormore branches 82. In the illustrated embodiment, the air from themain header 80 is divided into threebranches 82, each of which delivers a volume of air past aTED 20 or other fluid module. It will be appreciated that a climate control system can have more orfewer branches 82 and/or headers. Theblower 50 or other air delivery device can comprise an electrical fan or blower, such as, for example, an axial blower and/or radial fan. In the illustrated embodiment, asingle pumping device 50 is used to deliver air to both the main and waste heat exchangers. However, in other embodiments, separate pumping devices can be used to deliver air to the main and waste heat exchangers. - With continued reference to
FIG. 1 , air flowing past the main heat exchanger portion of eachTED 20 is discharged into amain discharge conduit 84. In some embodiments, this conditioned air is then routed to one or moreair distribution devices 40 where it is distributed through a plurality of orifices or other openings. Suchair distribution devices 40 can be placed immediately adjacent to a chair orbed assembly surface 14 or other user-interface surface. In some embodiments, one or more intermediate layers or devices can be situated between theair distribution device 40 and user-interface surface 14. - In
FIG. 1 , air flowing through a secondary or waste heat exchanger is routed into separate secondary orwaste discharge conduits 88. In some preferred embodiments, thesecondary discharge conduits 88 are configured so as to be in hydraulic communication with one another. Therefore, a single collection header (not shown) can be used to collect and remove the secondary or waste air stream to a desired location. - The
TEDs 20 illustrated inFIG. 1 are configured to cool (e.g., remove heat) the air flowing past the main heat exchanger and towards theair distribution devices 40. In such embodiments, when the heat exchangers are activated, air flowing past the secondary or waste heat exchangers is warmer than the air entering theTEDs 20. Alternatively, however, one, some or all of theTEDs 20 can be configured to warm air flowing through the main heat exchanger and cool air flowing through the secondary or waste heat exchangers. In other embodiments, a climate control system can be configured so that someTEDs 20 deliver cooler air and some deliver warmer air toair distribution devices 40. Preferably, the climate control system is configured to permit a user to easily modify whether warmer or cooler air is delivered to theair distribution devices 40. - The
TEDs 20 described herein represent only one exemplary embodiment of devices that can be used to condition the air or other fluid supplied by ablower 50. Thus, any of a variety of differently configured fluid modules or other devices may be used to condition a volume of fluid. Other examples of fluid modules that may be used are described in U.S. Pat. No. 6,223,539, 6,119,463, 5,524,439 or 5,626,021, which are hereby incorporated by reference in their entirety. Another example of such a fluid module is currently sold under the trademark Micro-Thermal Module™ by Amerigon Inc. In another example, theTED 20 or other fluid module can share one or more components (e.g., blowers, pumping devices, TEDs, etc.) with the vehicles general climate control system. - Such climate control systems can be advantageously configured and/or controlled to reduce capital and/or energy costs. As described herein, the
climate control system 10 can includefewer blowers 50 or other air transfer devices. Further, in some embodiments, the climate control system can be operated according to one or more control routines which are adapted to reduce energy consumption. In addition, such energy and cost saving measures can be implemented while maintaining or improving the performance of theclimate control system 10. - The
climate control systems 10, the control routines and their various features described herein can be used in a variety of user-interface apparatuses, such as, for example, beds (e.g., normal spring beds, select comfort beds, hospital beds, reclining beds, etc.), chairs (e.g., office chairs, task chairs, recliners, etc.), other seating assemblies, sofas, airplane seats, train seats or the like. - The energy consumption of the control system can be reduced by advantageously controlling the operation of one or more of the
TEDs 20 or otherfluid modules 20. For example, theTEDs 20, which are electrically operated, can be turned on or off according to an energy-reducing control scheme. In other embodiments, the electrical current delivered to one ormore TEDs 20 is modulated to achieve a desired level of cooling and/or heating for the air passing therethrough. - In some embodiments, the
blower 50 or other air transfer device is configured to continuously operate asfluid modules 20 are turned on/off or modulated. Alternatively, however, theblower 50 can be configured to turn on or off during the operation of theclimate control system 10. In other embodiments, the amount of air being delivered to theblower 50 can be varied by controlling the speed of the blower, by modulating one or more valves or by some other method. -
FIG. 2A schematically illustrates one embodiment of ascheme 200A for controlling the operation of the various components of a climate control system, including TEDs, other fluid modules, blowers and the like over a particular time period. In the depicted embodiment, the control system includes threeTEDs 120 and oneblower 150. During such anoperational scheme 200A, theTEDs 120 can either be turned on or off. Further, theblower 150 can be operated at any one of a plurality of operational levels. Alternatively, the blower can be configured to operate at a constant speed (e.g., on/off operation). InFIG. 2A , the shaded regions indicate that the particular device is operating (or, in the case of a device capable of variable operational levels, the level at which the device is operating) and the white regions indicate that the particular device is not operating. - Thus, during the
initial time period 250 in the illustrated embodiment, TED No. 1 is activated and TED Nos. 2 and 3 are deactivated. During that same time period, theblower 150 is delivering air to the climate control system at a relatively low rate (schematically represented by level 212). - With continued reference to
FIG. 2A , during thenext time interval 252, all threeTEDs 120 are activated. In addition, theblower 150 is configured to deliver the maximum volume of air through the control system (schematically represented by operational level 214). - As schematically illustrated, TED Nos. 2 and 3 are configured to remain activated, and TED No. 1 is configured to be deactivated during the
subsequent time period 254. Further, under this embodiment, theblower 214 continues to operate at thesame level 214 as it did in theprevious time interval 252. As shown inFIG. 2A , the operation of theTEDs 120 and theblower 150 can be varied from one time interval to the next. The operational characteristics of theTEDs 120 and/or theblower 150 can be modified (e.g., on/off, speed variation, etc.) in accordance with one or more desired control schemes. - Therefore, if the climate control system is similar to the embodiment illustrated in
FIG. 1 , the blower can continue to deliver air or other fluid past theTEDs 20 or other fluid modules even when theTEDs 20 are not activated (e.g., not electrically energized). Under such circumstances, fluid distributed through afluid distribution device 40 may not be temperature conditioned (e.g., cooled or heated) ifupstream TEDs 20 are deactivated. In other embodiments, the electrical current supplied to theTEDs 20 can be modulated, either in addition to or in lieu of simple TED activation/deactivation, in order to vary the extent to which air or other fluid is temperature conditioned. Consequently, the flow rate of fluid discharged from a particularfluid distribution device 40 towards a user can remain substantially constant even though the temperature of that fluid varies with time. In other arrangements, both the flow rate and the temperature of a fluid discharged from afluid distribution device 40 can fluctuate, asTEDs 20 are activated/deactivated and the blower's capacity is modified. - The incorporation of such control schemes in climate control systems can help reduce energy consumption, as some
TEDs 20 can be deactivated and/or turned down during certain time periods. In some embodiments, additional energy savings can be realized if theblowers 50 or other fluid delivery devices are configured for adjustable operation. Further, the capital costs and overall complexity of a climate control system can be reduced by utilizing a common header to deliver air or other fluid from ablower 50 to multiple fluid modules 20 (e.g., 20), as illustrated in the embodiment ofFIG. 1 . As a result,fewer blowers 50, electrical connections and the like may be needed. -
FIG. 2B illustrates another embodiment of ascheme 200B for controlling the operation of a climate control system. As shown, theTEDs 120 are configured to turn on or off so that only asingle TED 120 is operating at a time. Alternatively, the operational scheme can be configured so that two ormore TEDs 120 operate simultaneously. In the illustrated embodiment, theTEDs 120 are configured to be switched on and off in a sequential, orderly pattern. However, the order in which TEDs 120 are activated and deactivated can vary. For example,TEDs 120 can be operated in accordance with a more random pattern. - With continued reference to
FIG. 2B , theblower 150 is configured to operate at a constant operating level 230 (e.g., speed, output, etc.). Thus, the amount of air or other fluid being delivered to eachTED 120, and consequently to each downstream fluid distribution device, can remain substantially constant. This can help provide a consistent feel and comfort level to users of climate control seating assemblies (e.g., chairs, beds, etc.), as the flow rate of air being discharged from a particular surface or user-interface location does not fluctuate. However, it will be appreciated that asTEDs 120 are activated and deactivated, the temperature of the discharged air or other fluid will vary. - According to certain preferred embodiments, schemes regulating the operation of the
TEDs 120 and theblower 40 advantageously maintain a desired cooling or warming effect for the climate controlled seating assembly, while simultaneously reducing unnecessary energy consumption. This can help maintain a generally consistent power consumption rate during the operation of theTEDs 120, theblower 40 and any other components of a temperature conditioning system. Such a consistent power consumption rate can eliminate undesirable and potentially harmful spikes during the delivery of electrical energy. Further, such schemes can help maintain thermal inertia by allowing the temperature conditioning system to more quickly respond to desired temperature variations. In addition, the fairly constant volumetric delivery of conditioned and/or unconditioned air helps provide a more consistent feel to the occupant. Thus, the occupant is less likely to be disturbed or otherwise affected by a modulating flow rate and all the noticeable changes that accompany it (e.g., variations in sounds, feel, etc.). - In
FIG. 2C , the control scheme 200C is configured to sequence theTEDs 120 between activated and deactivated positions similarly to the embodiment ofFIG. 2B . However, in the illustrated arrangement, the control scheme 200C varies the operation (e.g., speed, flowrate, etc.) of theblower 150. As shown, the operation of theblower 150 follows a substantially sinusoidal pattern over time. Alternatively, the operation of theblower 150 can fluctuate in one or more other manners. For example, the speed and/or output of theblower 150 can follow a linear, non-linear, random, step-like or any other type of pattern. As discussed below, in some embodiments, theblower 150 can be controlled in response to one or more sensor measurements, an input from a user, a preprogrammed schedule, a mode change and/or the like. - With reference to
FIG. 2D , the energy supplied to each TED can be varied according to a sinusoidal or other type of pattern (e.g., linear, non-linear, random, etc.). As shown, if the control scheme is configured to vary the energy (e.g., voltage) supplied to the TEDs according to a particular timing offset, the total amount of energy consumed by the TEDs can remain at a substantiallyconstant level 270 over time. It will be appreciated that in other embodiments the total energy consumption of the TEDs can vary with time. As discussed above, there may be certain advantages associated with having a system that includes generally consistent power consumption and/or fluid flowrate characteristics. - According to certain embodiments, the operational scheme used to control the TEDs, blower and/or other components of a climate control system is based on a preprogrammed sequence. For example, the TEDs and blower can be configured to follow a particular time-based operational schedule, such as in the embodiments illustrated in
FIGS. 2A-2D and discussed herein. Therefore, once such a sequence is activated, a climate control system can follow a predetermined pattern in which the operation of the TEDs and/or blowers is modified. In some embodiments, such a time-activated sequence is initiated and/or terminated by the pressing of a button or turning of a knob. However, one or more other methods of initiating such operational sequences can also be used. For example, the sequence can be commenced by manipulating a lever or by entering a command on using a keypad, keyboard, touch screen or other controller. - In other embodiments, an operational sequence is configured to automatically begin and/or end based on the time of day, a timer (e.g., elapsed time from a particular event or occurrence) or the like. In still other configurations, a particular operational scheme can be activated and/or deactivated using feedback received from one or more sensors. For example, a temperature sensor, humidity or dew point sensor, condensation sensor, motion sensor, pressure sensor or the like. For example, a pressure sensor can be used to detect the presence of an individual on or near a climate controlled seat assembly (e.g., chair, bed, etc.). Thus, such seating assemblies can be configured to function in a desired manner when a user triggers a sensor or other activation device. In another embodiment, a humidity sensor can adjust the operating parameters to avoid condensation in the TEDs during humid conditions. In another embodiment, a condensation sensor can be used to adjust the operating parameters if condensation is detected.
- Moreover, the climate controlled seating assembly can be configured to function under two or more operational modes. For example, a climate controlled chair or bed can permit a user to select a level of cooling and/or heating (e.g., “Low-Medium-High”, “1-2-3-4-5”, etc.). Alternatively, seating assemblies can be configured with climate control systems that allow user to enter an actual temperature. In other embodiments, users can select a desired setting, temperature and/or other operational mode using a knob, lever, switch, keypad or the like. In still other arrangements, users are permitted to program an operational scheme for a climate controlled seating assembly that satisfies their unique preferences and/or requirements.
- As discussed, control of the TEDs, blower and/or other components of the climate control system can be based, at least partially, on feedback received from one or more sensors. For example, a climate controlled seat, bed or the like can include one or more thermal sensors, optical sensors, motion sensors, audible sensors, pressure sensors and/or the like. In some embodiments, such sensors can be positioned on or near the climate controlled seat assembly to determine whether cooling and/or heating of the assembly is required or desired. For instance, thermal sensors can help determine if the temperature at a surface of the seat assembly is above or below a desired level. Alternatively, one or more thermal sensors can be positioned in or near a TED or fluid conduit to detect the temperature of the discharged fluid. In still other embodiments, temperature sensor can be sued to detect the ambient temperature and the control system can be configured to activate the TEDs and/or blowers if the ambient temperature drops or rises below a predetermined temperature and/or a temperature setting determined by the user. Likewise, pressure sensors can be configured to detect when a user has been in contact with a surface of a seat, bed or the like for a prolonged time period. Depending on their type, sensors can contact a portion of the seating assembly. In some embodiments, a sensor is located within and/or on the surface of the seating assembly. However, in other arrangements, the sensors are configured so they do not contact the seating assembly.
- In some preferred embodiments, a control module is used to control the operation of the TEDs, blowers and/or other system components. Thus, a control module can be configured to execute a desired operational scheme as described herein. The control module can be configured to activate, deactivate and/or modulate the TEDs, blowers and the like. In addition, the control module can include connections to one or more sensors, user-interface devices (e.g., knobs, buttons, or other mode selection devices, keypads, etc.), timers and any other devices that are desirable or necessary for the proper execution of a particular operational scheme. Further, the control module can be adapted to cooperate and communicate with one or more other control systems, such as, for example, an automotive control panel or the like. Thus, a user can select a desired mode of operation directly from a car's dashboard or other instrument panel.
-
FIGS. 3A and 3B schematically illustrate one embodiment of a climate controlledbed 310 equipped with a control scheme as described herein. As shown, the climate controlledbed 310 comprises asingle blower 350 and threeTEDs 320. However, in other arrangements, thebed 310 can include more orfewer blowers 350 andTEDs 320, as desired. In some preferred embodiments, the climate controlledbed 310 is configured so that theblower 350, theTEDs 320,conduits bed 310 so they are not visible to users. In addition, thebed 310 preferably comprises an power source (e.g., power cord, battery, etc.) from which the various components (e.g.,blower 350,TEDs 320, control module, etc.) can be electrically energized. - With continued reference to
FIGS. 3A and 3B , theblower 350 can be configured to draw a volume of ambient air or other fluid and discharge it into amain discharge header 380. As illustrated, thebed 310 can include one ormore openings 390 to permit fluid to enter thebed interior 316. Once air or other fluid has been delivered into themain discharge header 380, it can be directed to thevarious distribution branches 382. Although not shown, themain header 380 and/or thedistribution branches 382 can include valves and/or other regulation devices to selective control the fluid flowrate and/or pressure to eachTED 320 andfluid distribution device 340. - In the illustrated embodiment, air or other fluid diverted into each
distribution branch 382 enters aTED 320 or other type of fluid conditioning module. As shown inFIG. 3B , fluid flowing through theTEDs 320 enters either amain discharge conduit 384 or asecondary discharge conduit 388. TheTED 320 can be configured to either cool or heat the air entering themain discharge conduit 384. In the event aparticular TED 320 is not activated, however, the air exiting into themain discharge conduit 384 will be approximately at the same temperature as the ambient air entering the blower. As discussed, whether a TED is activated or deactivated can depend on the particular operational scheme being used by the climate control system. - With continued reference to
FIGS. 3A and 3B , air or other fluid directed into themain discharge conduit 384 can enter into afluid distribution device 340, regardless of whether or not it was actually conditioned by aTED 320. In some embodiments, thefluid distribution device 340 comprises a plurality ofopenings 342 through which the air or other fluid exits. As illustrated inFIGS. 3A and 3B , air or other fluid discharged from theair distribution device 340 can contact and diffuse through amattress 314, pad or other member. Preferably such amattress 314, pad or other member can be configured to permit fluid discharged from thefluid distribution devices 340 to reach one or more of its exposed surfaces 312. - As illustrated, air or fluid discharged from the
TED 320 into thesecondary discharge conduit 388 can be collected into a common header and expelled from thebed 310 through one ormore outlets 394. - A control scheme as described herein can be advantageously used to manage the operation of the three
TEDs 320 andblower 350 depicted inFIGS. 3A and 3B . As discussed, such an operational scheme can be configured to sequence theTEDs 320 between activated and deactivated positions in order to reduce energy consumption. In other embodiments, the operational scheme is capable of modulating theTEDs 320 between minimum and maximum levels. Likewise, under certain arrangements, the control scheme can modulate the flowrate, speed and/or discharge pressure of theblower 350 within a desired range. - Consequently, air or other fluid can flow through the various
fluid distribution devices 340 to the exposedsurfaces 312 of themattress 314, regardless of which TEDs 320 were activated or deactivated. Thus, a user can sense a consistent flow of air or other fluid when he or she is situated on themattress 314. In some embodiments, the climate controlledbed 310 includes a switch, keypad or other user-interface device (not shown) to allow a user to adjust the target temperature, the mode of operation and/or any other setting related to the climate control system. Further, thebed 310 can include one or more sensors that can further enhance the function of the climate control system under certain operational schemes, as described above. For example, as described above, in one embodiment thebed 310 can include a temperature sensor positioned near theTEDs 310, within thedistribution devices 340 and/or near the support surface of themattress 314. A closed loop control routine can be provided for regulating the temperature of the air provided by the TEDs to a predetermined and/or user selected temperature. In another embodiment (or in combination with the previous embodiment), the closed loop control routine can be configured to regulate the temperature of the air provided by the TED in response to measure of the ambient temperature. In another modification, the control system can be configured to deactivate the blower and/or the TEDs after a user selected or predetermined amount of time. -
FIGS. 4 and 5 illustrate two different embodiments of climate-controlled beds having distinct zones or sections. Such schemes can provide enhanced cooling and/or heating control to certain portions of the bed. Consequently, a user can customize a temperature-conditioning effect to his or her liking. For example, a user can choose to provide more or less cooling or heating to a particular zone or section. Further, such embodiments permit each occupant (e.g., in a dual occupant bed) of a single bed to select a desired level of cooling and/or heating. - In
FIG. 4 , the illustrated bed 110 includes six different cooling and/orheating zones 412A-F. For clarity, the vast majority of a top member orpad 480 has been removed to reveal thedistribution system 470A-F positioned below thepad 480. Eachzone 412A-F includes its own flow thermoelectric device (not shown) such that each distribution system can be associated with its own thermoelectric device. In addition, eachflow distribution system 470A-F can be configured to receive conditioned (e.g., heated and/or cooled) or unconditioned (e.g., ambient) air or other fluid from one or more fluid transfer devices (not shown). In some embodiments, the air or other fluid delivered by the fluid transfer devices can be routed through, past or in the vicinity of one or more thermoelectric devices to selectively temperature condition the air or other fluid. - With continued reference to
FIG. 4 , thedistribution system 470A-F used in eachzone 412A-F is substantially identical in size and shape. However, it will be appreciated that the shape, size, air distribution effect and/or characteristics of thedistribution systems 470A-F used within a particular bed 110 can vary, as desired or required by a particular application. InFIG. 5 , theflow distribution systems 470A-F are generally positioned where the bed's occupants are most likely to be situated. Thus, depending on the size of the bed, the number of occupants it is intended to hold and/or the like, the number, shape, size, spacing, location and other characteristics of theflow conditioning members 470A-F can vary. - The embodiment of the climate-controlled bed 210 illustrated in
FIG. 5 includes only four cooling and/orheating zones 512A-D. As shown, each zone comprises aflow distribution member 570A-D. However, unlike theflow distribution members 470A-F discussed and illustrated with reference toFIG. 4 , theseflow distribution members 570A-D vary from zone to zone. For example, theflow conditioning members zones 512A, 512B on one end of thebed 510 are larger in surface area than theflow conditioning members 570C, 570D in the other twozones Flow distribution members - Additional details and/or embodiments of a climate controlled bed that can be used in combination, sub-combination or as replacement of a certain features are disclosed in U.S. patent application Ser. No. 11/872,657, filed Oct. 15, 2008 and published as No. 2008-0148481 on Jun. 26, 2008, the entire contents of which are hereby incorporated by reference herein.
-
FIG. 6 illustrates another embodiment of a climate controlledbed 600. In this embodiment, thebed 600 includes afirst side 602 and a second side 604. Each side of the bed can be associated with a set ofthermoelectric devices side 602, 604 of the bed has a separate distribution system. - The
thermoelectric devices control module 610, which can also be operatively coupled to a blower (not shown) Thecontrol module 610 can in turn be operatively coupled to a first andsecond input device bed 600 using theinput devices 612. In other embodiments, theinput devices 612 can be combined into a single device with, for example, different modes. - In one embodiment, the
control module 610 is configured for open loop operation which based upon the settings from the input devices thecontrol module 610 operates theTEDs temperature sensors 616 can be provided for detecting the temperature of the air delivered by theTEDs sensors 616 can be used as a fail safe and/or as part of a closed loop control routine. In one modified arrangement, thecontrol module 610 can be configured to shut off the TEDs and/or blowers after a predetermined amount of time and/or after an amount of time inputted by the user through theinput devices -
FIG. 6 also illustrates apower supply 618 that can be coupled to the control module. In one embodiment, a single box orhousing 620 contains thepower supply 618 and thecontrol module 610. - To assist in the description of the disclosed embodiments, words such as upward, upper, downward, lower, vertical, horizontal, upstream, and downstream have and used above to describe the accompanying figures. It will be appreciated, however, that the illustrated embodiments can be located and oriented in a variety of desired positions.
- In addition, in the description above, various components are described as being “coupled” together or “operatively coupled” together. It is to be understand that these are intended to be broad terms that includes components that are directly or indirectly connected to each other and/or connected to each other through one or more intermediate members. In addition, with respect to electrical components, the components can be electrically connected directly or indirectly through intermediate components and/or wirelessly (e.g., through IR or other wireless transmission devices.
- Although these inventions have been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the present inventions extend beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the inventions and obvious modifications and equivalents thereof. In addition, while a number of variations of the inventions have been shown and described in detail, other modifications, which are within the scope of these inventions, will be readily apparent to those of skill in the art based upon this disclosure. It is also contemplated that various combinations or subcombinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the inventions. Accordingly, it should be understood that various features and aspects of the disclosed embodiments can be combine with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above, but should be determined only by a fair reading of the claims that follow.
Claims (19)
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WO2009036077A1 (en) | 2009-03-19 |
US10405667B2 (en) | 2019-09-10 |
US7877827B2 (en) | 2011-02-01 |
US20110119826A1 (en) | 2011-05-26 |
US20180213942A1 (en) | 2018-08-02 |
US7996936B2 (en) | 2011-08-16 |
US20090064411A1 (en) | 2009-03-12 |
US8402579B2 (en) | 2013-03-26 |
US20110296611A1 (en) | 2011-12-08 |
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