CN102032754A - Thermal storage device with ice thickness detection and control methods - Google Patents

Thermal storage device with ice thickness detection and control methods Download PDF

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Publication number
CN102032754A
CN102032754A CN2010105494368A CN201010549436A CN102032754A CN 102032754 A CN102032754 A CN 102032754A CN 2010105494368 A CN2010105494368 A CN 2010105494368A CN 201010549436 A CN201010549436 A CN 201010549436A CN 102032754 A CN102032754 A CN 102032754A
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CN
China
Prior art keywords
fluid
heat exchanger
heat
pump
refrigeration system
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Pending
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CN2010105494368A
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Chinese (zh)
Inventor
W·F·莫斯
B·W·本森
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Thermo King Corp
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Thermo King Corp
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Publication of CN102032754A publication Critical patent/CN102032754A/en
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    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/006—Self-contained movable devices, e.g. domestic refrigerators with cold storage accumulators
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery

Abstract

A thermal storage device for generating a thermal storage medium from a fluid and including a storage tank for containing the fluid, a refrigeration system having a heat exchanger positioned in the storage tank, a pump for pumping the fluid through the storage tank, a storage medium detection device, and a controller. The storage medium detection device generates a signal corresponding to at least one parameter of the pump. The controller controls the refrigeration system in one of a first mode and a second mode based on the signal. The at least one heat exchanger removes heat from the fluid to generate the thermal storage medium thereon when the refrigeration system operates in the first mode, and the at least one heat exchanger does not remove heat from the fluid thereby terminating generation of the thermal storage medium when the refrigeration system operates in the second mode.

Description

Have thermmal storage device and control method that the ice thickness degree detects
Background technology
The present invention relates to a kind of thermmal storage device, specifically is a kind of thermmal storage device that utilizes ice as storage medium, also comprises the detection method that is used for determining the ice thickness degree.
Summary of the invention
In one embodiment, the invention provides a kind of control produces heat-storing medium from fluid method.This method comprises that at least one heat exchanger with refrigeration system is arranged in the holding vessel that fluid is housed, utilize pump along the flow path pumping fluid in the holding vessel, at least one parameter of sensing pump, produce the corresponding signal of at least one parameter with this pump, based on this signal controlling refrigeration system first pattern and second pattern one of them down, the operation refrigeration system under first pattern to utilize at least one heat exchanger from fluid, to remove heat, thereby on this at least one heat exchanger, produce heat-storing medium, the operation refrigeration system is under second pattern, wherein heat is not removed from fluid by this at least one heat exchanger, and described second pattern is used to terminate at least one heat exchanger and produces heat-storing medium.
In another embodiment, the invention provides a kind of thermmal storage device that is used for producing heat-storing medium from fluid.This thermmal storage device comprises holding vessel, refrigeration system, pump, storage medium checkout gear and controller.Holding vessel has first and second ports, and its mutual fluid is communicated with, and to limit the flow path by the holding vessel between first port and second port, holding vessel is configured to comprise fluid.Refrigeration system comprises that at least one is arranged on the heat exchanger in the fluid in the holding vessel.The pump fluid is engaged to first port and second port, and can operate to pass through the flow path pumping fluid.The storage medium checkout gear can be operated with at least one parameter corresponding signal of generation with pump.Controller and storage medium checkout gear and refrigeration system are electrically connected, and controller can be operated with the control refrigeration system in first pattern and one of them time of second pattern based on above-mentioned signal.When refrigeration system was operated in for first pattern following time, this at least one heat exchanger is removed heat from fluid, producing heat-storing medium thereon, when this refrigeration system was operated in for second pattern following time, heat is not removed from fluid by this at least one heat exchanger, therefore stops producing heat-storing medium.
Consider and describe in detail and accompanying drawing that other aspects of the present invention will become apparent.
Description of drawings
Fig. 1 is the schematic cross-section according to thermmal storage device of the present invention.
Fig. 2 is that thermmal storage device shown in Figure 1 has produced the later schematic cross-section of heat-storing medium.
The specific embodiment
Before describing any embodiment of the present invention in detail, need understand the present invention is not limited to the parts that illustrate in following detailed or the accompanying drawing when using structure and arrangement details.The present invention can also have other embodiment, can implement in many ways or realize.
Fig. 1-2 shows thermmal storage device 10 respectively, is used for producing heat-storing medium 14 from fluid 18, for example can produce ice from water.This thermmal storage device 10 comprises holding vessel 22, refrigeration system 26, pump 30, the first storage medium checkout gear 34a and the second storage medium checkout gear 34b and controller 38.In the structure that illustrates, thermmal storage device 10 is used for providing extra amount of cooling water in that near the perishable product the results districts is carried out pre-cooled process, thereby begins immediately to keep the pot-life of perishable product.Thermmal storage device 10 is connected with water cooler 40 fluids of appropriate size, and this water cooler 40 for example can be immersed water-cooled but device or injecting type water cooler.Heat-storing medium 14 produced in non-harvest time, for example at night.Fluid 18 is cooled off by heat-storing medium 14 during use, is used to cool off perishable product.Thermmal storage device 10 and water cooler 40 are formed modular system, and it can be transported to each place and assemble fast.In other structures, can adopt other fluids and heat-storing medium, thermmal storage device 10 also can install fluid with other and be connected to be applied to other application.
Refrigeration system 26 comprises cooling fluid and a plurality of plate type heat exchanger 50a and 50b, and plate type heat exchanger receives chilled fluid flow by wherein with cooling heat exchanger 50a and 50b under first refrigerating mode.Should be appreciated that refrigeration system 26 comprises the refrigeration system of any suitable type, such as but not limited to the direct expansion system that has evaporimeter or have the freezing glycol system of refrigerating plant.
Heat exchanger 50a and 50b are arranged in the fluid 18 in the holding vessel 22.Holding vessel 22 comprises first wall 54 and second wall 58 relative with first wall 54.First group of heat exchanger 50a is basically perpendicular to first wall 54 and extended with the form of cantilever by first wall 54, makes and leave the slit between the first group of heat exchanger 50a and second wall 58.Second group of heat exchanger 50b is basically perpendicular to second wall 58 and extended with the form of cantilever by second wall 58, makes and leave the slit between second group of heat exchanger 50b and first wall 54.Jar 22 also comprises antetheca and rear wall (not shown), and first group of heat exchanger 50a and second group of heat exchanger 50b also can extend from antetheca and rear wall by other structures.
Second group of heat exchanger 50b and first group of heat exchanger 50a make the slit alternately and define snakelike flow path (referring to the arrow among Fig. 1) in holding vessel 22 with the form that replaces at interval.In other structures, can adopt the heat exchanger of other types, make heat-storing medium 14 on the surface of heat exchanger, to produce.In other structures, heat exchanger 50a and 50b can arrange in other modes of the flow path that defines other shapes.
Holding vessel 22 comprises fluid 18, and has first port 42 and second port 46 that mutual fluid is communicated with.Snakelike flow path (referring to the arrow among Fig. 1) extends between first port 42 and second port 46, arrives second port 46 from first port 42 by thermmal storage jar 22.Pump 30 fluids connect first port 42 and second port 46, and can operate with by flow path pumping fluid 18, are used to improve the formation of the heat-storing medium 14 when producing heat-storing medium 14 during non-harvest time.In non-harvest time, pump 30 work makes fluid 18 in first circuit cycle, and this loop comprises first port 42, the snakelike flow path and second port 46.After flowing out second port 46, pump makes cooling fluid 18 recirculation get back to first port 42.During use, water cooler 40 work so that fluid 18 in second circuit cycle, this loop comprises first port 42, snakelike flow path, second port 46 and water cooler 40, it comprises complementary pump 66, be used to make fluid 18 to return first port 42, pass through holding vessel 22 with recirculation.Second loop also comprises valve 62, is used for closing second loop in the closed position, opens second loop at open position.Valve 62 is closed in the operating period in non-harvest time and opens.
Storage medium checkout gear 34a and 34b can operate with at least one parameter corresponding signal of generation with pump 30.In some constructions, only adopt a heat-storing medium checkout gear 34a or 34b in the thermmal storage device 10.Signal shows storage medium checkout gear 34a and 34b together among the figure for convenience.
The first storage medium checkout gear 34a comprises a pair of pressure sensor, and it is arranged on the upstream and downstream of pump 30, to be used to measure the pressure reduction of crossing on the pump 30.This pressure reduction shows the size of heat-storing medium 14, for example the thickness of heat-storing medium 14.Heat-storing medium 14 is thick more, and the flow area in the snakelike flow path is just more little.Along with the thickness increase of heat-storing medium 14, the pressure reduction of crossing on the pump 30 increases.When pressure reduction reached predetermined difference, controller 38 was ended the formation of heat-storing medium 14.
The second storage medium checkout gear 34b comprises that energy consumption table (for example watt meter) is to measure the energy consumption of pump 30.Along with the flow area in the snakelike flow path reduces, the energy consumption of pump 30 increases.Therefore, the energy consumption of pump 30 increases the thickness that shows heat-storing medium 14 increases.When the energy consumption of pump 30 reaches scheduled volume, controller 38 will be ended the formation of heat-storing medium 14.
Controller 38 is electrically connected with storage medium checkout gear 34a, 34b and refrigeration system 26, and this controller 38 can be operated with control refrigeration system 26 in first pattern and one of them time of second pattern based on above-mentioned signal.When refrigeration system 26 was operated in for first pattern following time, heat exchanger 50a and 50b remove heat from fluid 18, thereby on heat exchanger 50a and 50b, produce heat-storing medium 14, when refrigeration system 26 was operated in for second pattern following time, heat is not removed from fluid 18 by heat exchanger 50a and 50b, therefore stops producing heat-storing medium 14.For example, controller 38 can be ended the operation of refrigeration system 26 and/or the operation of pump 30.
At work, heat-storing medium 14 produced in non-harvest time, and for example at night, refrigeration system 26 is operated under first pattern during this period.26 coolings of the cooled system of heat exchanger 50a and 50b, pump 30 is along the first loop pumping fluid 18 (being that valve 62 cuts out), to increase the heat exchanger 50a of heat-storing medium 14 in snakelike flow path and the lip-deep formation of 50b.The cooling potential of this storage is used for using so that peak demand minimizes during following high load capacity or peak demand.In addition, this allows to adopt littler refrigeration system down in high utilization rate (for example whole day).If understand predetermined heat-storing medium thickness by signal list storage medium checkout gear 34a and one of them generation of 34b and that controlled device 38 receives, then controller 38 is ended the formation of heat-storing medium 18, thereby prevents that flow path from being stopped up fully.
During the operating period, valve 62 is arranged on open position, and fluid 18 is directed to thermmal storage device 10, is cooled off by heat-storing medium 14 at thermmal storage device 10 inner fluids 18.Fluid 18 is directed to water cooler 40 then, for example by submergence or injection cooling perishable product.Fluid 18 is collected and leads back to again thermmal storage device 10 subsequently, cools off and utilization again, to be used for the cooling of other perishable product again.
Therefore, the present invention mainly provides a kind of thermmal storage device that is used for producing from fluid heat-storing medium, and a kind ofly controls the method that heat-storing medium produces from fluid.The various feature and advantage of the present invention are illustrated in claims.

Claims (23)

1. a control produces the method for heat-storing medium from fluid, and described method comprises:
At least one heat exchanger of refrigeration system is arranged in the holding vessel that comprises described fluid;
Utilize pump along the described fluid of flow path pumping in the described holding vessel;
At least one parameter of the described pump of sensing;
Produce the corresponding signal of described at least one parameter with described pump;
Based on the described refrigeration system of described signal controlling first pattern and second pattern one of them down;
Operate described refrigeration system under described first pattern utilizing described at least one heat exchanger from described fluid, to remove heat, thereby on described at least one heat exchanger, produce described heat-storing medium; And
Operate described refrigeration system under described second pattern, wherein heat is not removed from described fluid by described at least one heat exchanger, and described second pattern is used to terminate in the described heat-storing medium of generation on described at least one heat exchanger.
2. the method for claim 1 further comprises:
Under described first pattern cooling fluid of the described refrigeration system of guiding by evaporimeter and refrigerating plant one of them, thereby cool off fluid in the described holding vessel.
3. the method for claim 1, wherein produce signal comprise produce and cross pump on the corresponding signal of pressure reduction.
4. the method for claim 1 wherein produces signal comprises that generation and described pump consume when longshore current moves the described fluid of path pumping the corresponding signal of energy.
5. the method for claim 1 further comprises described at least one parameter is associated with the specific dimensions of described heat-storing medium.
6. the method for claim 1, wherein at least one heat exchanger of refrigeration system being arranged on to be included in the holding vessel in the described holding vessel makes a plurality of plates staggered with the form that replaces, make described a plurality of plate in described holding vessel, define snakelike path, and wherein utilize the moving described fluid of path pumping of pump longshore current to comprise and utilize described pump along the described snakelike described fluid of path pumping.
7. method as claimed in claim 6, wherein in described holding vessel, a plurality of plates are interlocked and comprise being arranged on the first wall of described holding vessel described a plurality of plates every a plate with the form that replaces, remaining plate of described a plurality of plates is arranged on second wall of described holding vessel, and described second wall is relative with first wall.
8. the method for claim 1 wherein is included under described second pattern described refrigeration system of operation in the described refrigeration system of operation under described second pattern and closes described flow path to prevent described heat-storing medium.
9. the method for claim 1 is wherein during the described fluid of described flow path pumping occurs in first pattern, to improve the formation of described heat-storing medium.
10. one kind is used for from the thermmal storage device of fluid generation heat-storing medium, and described thermmal storage device comprises:
Holding vessel, described holding vessel comprise first port and second port, and its mutual fluid is communicated with, and to limit the flow path by the holding vessel between described first port and described second port, described holding vessel is configured to comprise described fluid;
Refrigeration system, described refrigeration system comprise that at least one is arranged on the interior heat exchanger of fluid in the described holding vessel;
Pump, described pump fluid engage described first port and described second port, and can operate with by the described fluid of described flow path pumping;
Storage medium checkout gear, described storage medium checkout gear can be operated with at least one parameter corresponding signal of generation with described pump; And
Controller, described controller and described storage medium checkout gear and described refrigeration system are electrically connected, described controller can be operated to control described refrigeration system in first pattern and one of them time of second pattern based on described signal, wherein be operated in described first pattern following time when described refrigeration system, described at least one heat exchanger is removed heat from described fluid, thereby produce described heat-storing medium thereon, wherein be operated in described second pattern following time when described refrigeration system, heat is not removed from described fluid by described at least one heat exchanger, therefore stops producing described heat-storing medium.
11. thermmal storage device as claimed in claim 10, the feature of the described heat-storing medium of wherein said at least one parameter indicating.
12. thermmal storage device as claimed in claim 11, wherein said feature comprises the size of described heat-storing medium.
13. thermmal storage device as claimed in claim 10, wherein said at least one parameter comprises the pressure reduction of crossing on the described pump.
14. thermmal storage device as claimed in claim 10, wherein said at least one parameter comprise the energy that described pump consumes during by flow path at the described fluid of pumping.
15. thermmal storage device as claimed in claim 10, wherein said at least one heat exchanger comprises plate type heat exchanger.
16. thermmal storage device as claimed in claim 10, wherein said fluid comprises water, and described heat-storing medium comprises ice.
17. thermmal storage device as claimed in claim 10, wherein said flow path comprises snakelike.
18. thermmal storage device as claimed in claim 10, wherein said refrigeration system comprises cooling fluid, and wherein said at least one heat exchanger receives chilled fluid flow by wherein to cool off described at least one heat exchanger under described first refrigerating mode.
19. thermmal storage device as claimed in claim 10, wherein said holding vessel comprises first wall and second wall relative with described first wall, wherein said at least one heat exchanger comprises first plate type heat exchanger and second plate type heat exchanger, and wherein said first plate type heat exchanger extends from described first wall, described second plate type heat exchanger extend by described second wall and with described first plate type heat exchanger at interval, make to define snakelike path by described first plate type heat exchanger and described second plate type heat exchanger in described holding vessel, wherein said flow path comprises snakelike path.
20. thermmal storage device as claimed in claim 10, wherein said storage medium checkout gear comprises the static pressure switch, and it is used to produce and cross pressure on the described pump corresponding signal that raises.
21. thermmal storage device as claimed in claim 20, the pressure rising of wherein crossing on the described pump has shown maximum heat storage medium thickness.
22. thermmal storage device as claimed in claim 10, wherein said pump can be operated to improve the formation of described storage medium during described first pattern.
23. a control produces the method for heat-storing medium from fluid, described method comprises:
In comprising the holding vessel of described fluid, make a plurality of heat exchanger plates staggered, make described a plurality of heat exchanger plate in described holding vessel, define snakelike path with the form that replaces;
Utilize pump along the snakelike described fluid of path pumping in the described holding vessel;
At least one parameter of the described pump of sensing, at least one parameter of wherein said pump comprise energy that the pressure reduction crossed on the described pump and described pump consume along the described fluid of described flow path pumping the time at least one of them;
Produce the corresponding signal of at least one parameter with described pump;
At least one parameter of described pump is associated with the specific dimensions of described heat-storing medium;
Based on the described refrigeration system of described signal controlling first pattern and second pattern one of them down;
Operate described refrigeration system under described first pattern utilizing described at least one heat exchanger from described fluid, to remove heat, thereby on described at least one heat exchanger, produce described heat-storing medium; And
Operate described refrigeration system under described second pattern, wherein heat is not removed from described fluid by described at least one heat exchanger, and described second pattern is used to terminate in the described heat-storing medium of generation on described at least one heat exchanger.
CN2010105494368A 2009-10-02 2010-10-08 Thermal storage device with ice thickness detection and control methods Pending CN102032754A (en)

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US12/572,434 US20110079025A1 (en) 2009-10-02 2009-10-02 Thermal storage device with ice thickness detection and control methods

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