CN102966520A - Piezoelectric pump - Google Patents
Piezoelectric pump Download PDFInfo
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- CN102966520A CN102966520A CN2012104428175A CN201210442817A CN102966520A CN 102966520 A CN102966520 A CN 102966520A CN 2012104428175 A CN2012104428175 A CN 2012104428175A CN 201210442817 A CN201210442817 A CN 201210442817A CN 102966520 A CN102966520 A CN 102966520A
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- pump
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- diaphragm
- piezoelectric
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Abstract
The invention discloses a piezoelectric pump, which comprises a pump body and a pump core, wherein the pump core is arranged on the middle part of the pump body and is used for separating the pump body into a water inlet cavity and a water outlet cavity, the water inlet cavity is mutually isolated from the water outlet cavity, the water inlet cavity side of the pump body is provided with a water inlet, the water outlet cavity side of the pump body is provided with a water outlet, the pump core comprises a membrane sheet and circular piezoelectric ceramic sheets, the circular piezoelectric ceramic sheets are attached on the membrane sheet or both sides of the membrane sheet, and the membrane sheet is provided with a plurality of conical holes. When the piezoelectric pump works, the circular piezoelectric ceramic sheets are connected with a power supply through conducting wires, the membrane sheet rhythmically contracts to the water inlet cavity side and the water outlet cavity side in the pump body, then the water inlet cavity rhythmically sucks water, and the water outlet cavity rhythmically drains water, so the water supply function of the water pump is realized. Meanwhile, the membrane sheet is provided with the plurality of conical holes, so the water flow of the pump body can be precisely controlled by the conical holes, and further the precise adding of the liquid is realized. The piezoelectric pump has the advantages that the structure is simple and the operation is convenient, and the piezoelectric pump is applied to the field of piezoelectric ceramics.
Description
Technical field
The present invention relates to the fluid driver field, particularly relate to a kind of piezoelectric pump.
Background technique
Piezoelectric pump is a kind of novel fluid driver, it does not need the additional drives motor, but the inverse piezoelectric effect of utilizing piezoelectric constant makes piezoelectric vibrator produce distortion, realizes fluid output or utilize piezoelectric vibrator to produce fluctuating fluid transfer by being out of shape the volume-variation that produces pump chamber again.
Piezoelectric pump in the past is comprised of piezoelectric vibrator, pump valve and the pump housing, and in the working procedure of piezoelectric pump, when the piezoelectric vibrator two ends applied ac power supply, piezoelectric vibrator is radial compression under electric field action, inner generation tensile stress, thus make piezoelectric vibrator bending deflection.When the piezoelectric vibrator forward is crooked, the piezoelectric vibrator elongation, pump chamber increases, and cavity fluid pressure reduces, and pump valve is opened, and liquid enters pump chamber; When piezoelectric vibrator during to back-flexing, piezoelectric vibrator shrinks, and pump chamber reduces, and cavity fluid pressure increases, and pump valve cuts out, and pump chamber liquid is extruded discharge, forms mild continuously directional flow.
But this type of piezoelectric pump need to all arrange pump valve at its influent side and water outlet side usually, and in order to realize the meticulous control to pump duty, can cause its structure very complicated, and manufacturing and maintenance cost are all higher.
Summary of the invention
For addressing the above problem, the invention provides and a kind ofly can carry out meticulous control and simple in structure, easy to operate piezoelectric pump to pump duty.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of piezoelectric pump, comprise the pump housing and be arranged at the pump housing middle part pump housing is divided into the water-inlet cavity that is isolated from each other and the pump core of water chamber, be provided with water intake in the water-inlet cavity side on the pump housing, be provided with water outlet in the water chamber side on the pump housing, the pump core comprises a diaphragm and is covered on the diaphragm or the ring piezoelectric ceramic plate of diaphragm both sides that diaphragm is provided with some cone shape holes.
Be further used as the improvement of technical solution of the present invention, diaphragm covers the annular distance position of annular piezoelectric ceramic fully, and each cone shape hole all is positioned at the ring position of ring piezoelectric ceramic plate.
Be further used as the improvement of technical solution of the present invention, the middle part of diaphragm is provided with a projection, and each cone shape hole all is positioned on the projection.
Be further used as the improvement of technical solution of the present invention, diaphragm is a smooth diaphragm.
Be further used as the improvement of technical solution of the present invention, the diameter of the cone shape hole water intake of each cone shape hole is 50～500 μ m, and the diameter of the cone shape hole water outlet of each cone shape hole is 2～50 μ m.
Be further used as the improvement of technical solution of the present invention, the pump housing comprises loam cake and the lower cover that is fitted to each other, and the pump core is folded between loam cake and the lower cover.
Be further used as the improvement of technical solution of the present invention, the sectional area of diaphragm is greater than the sectional area of loam cake and lower cover, and the ring piezoelectric ceramic plate is covered on around the outer ring of the pump housing.
Be further used as the improvement of technical solution of the present invention, be equipped with seal ring between loam cake and lower cover and diaphragm.
Be further used as the improvement of technical solution of the present invention, diaphragm is the elastic material diaphragm.
Beneficial effect of the present invention: this piezoelectric pump in the course of the work, the ring piezoelectric ceramic plate passes through wire connecting power, diaphragm shrinks to water-inlet cavity and water chamber both sides the pump body rhythm, thereby so that the suction of water-inlet cavity rhythm, and the discharging water of water chamber rhythm, thereby realize the water supply effect of water pump, the some cone shape holes that arrange on the diaphragm simultaneously can carry out meticulous control to pump duty, thereby realize the meticulous interpolation of liquid, and this Athens pump structure is simple, easy to operate.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is first embodiment of the invention overall structure schematic representation;
Fig. 2 is second embodiment of the invention overall structure schematic representation;
Fig. 3 is pump cored structure first embodiment's overall structure schematic representation among the present invention;
Fig. 4 is pump cored structure second embodiment's overall structure schematic representation among the present invention;
Fig. 5 is pump cored structure the 3rd embodiment's overall structure schematic representation among the present invention;
Fig. 6 is pump cored structure the 4th embodiment's overall structure schematic representation among the present invention;
Fig. 7 is the upper conical hole structure schematic representation of diaphragm of the present invention.
Embodiment
With reference to Fig. 1～Fig. 7, the present invention is a kind of piezoelectric pump, comprise the pump housing 1 and be arranged at the pump housing 1 middle part the pump housing 1 is divided into the water-inlet cavity 3 that is isolated from each other and the pump core 2 of water chamber 4, be provided with water intake 5 in water-inlet cavity 3 sides on the pump housing 1, be provided with water outlet 6 in water chamber 4 sides on the pump housing 1, pump core 2 comprises a diaphragm 21 and is covered on the diaphragm 21 or the ring piezoelectric ceramic plate 22 of diaphragm 21 both sides that diaphragm 21 is provided with some cone shape holes.
This piezoelectric pump in the course of the work, ring piezoelectric ceramic plate 22 passes through wire connecting power, diaphragm 21 is in the pump housing 1 inner rhythmic shrinking to water-inlet cavity 3 and water chamber 4 both sides, thereby so that the suction of water-inlet cavity 3 rhythms, and the discharging water of water chamber 4 rhythms, thereby realize the water supply effect of water pump, the some cone shape holes that arrange on the diaphragm 21 simultaneously can carry out to the current by the pump housing 1 meticulous control, thereby realize the meticulous interpolation of liquid, and this Athens pump structure is simple, easy to operate.
This piezoelectric pump can be realized low-voltage driving, and drive voltage range is 3～20V, and this piezoelectricity pump structure is very simple simultaneously, so that the volume of himself can be very little.This piezoelectric pump can be realized the ultraprecise control of flow, and it can show that minimum discharge is 0.003ml/min.
As the preferred embodiment of the present invention, diaphragm 21 covers the annular distance position of annular piezoelectric ceramic 22 fully, and each cone shape hole all is positioned at the ring position of ring piezoelectric ceramic plate 22.The middle part of diaphragm 21 is provided with a projection 211, and each cone shape hole all is positioned on the projection 211.
As the preferred embodiment of the present invention, diaphragm 21 is a smooth diaphragm.
As the preferred embodiment of the present invention, the diameter of the cone shape hole water intake of each cone shape hole is 50～500 μ m, and the diameter of the cone shape hole water outlet of each cone shape hole is 2～50 μ m.
The size and number of each cone shape hole can arrange as required, and the aperture of each cone shape hole on the diaphragm 21 is arranged the quantity that can change the cone shape hole on the diaphragm 21.Simultaneously, can control tiny flow quantity by piezoelectric pump by the change in aperture, diaphragm 21 upper conical hole, thereby realize the meticulous interpolation of liquid.
As the preferred embodiment of the present invention, the pump housing 1 comprises loam cake 11 and the lower cover 12 that is fitted to each other, and pump core 2 is folded between loam cake 11 and the lower cover 12.
As the preferred embodiment of the present invention, the sectional area of diaphragm 21 is greater than the sectional area of loam cake 11 and lower cover 12, and ring piezoelectric ceramic plate 22 is covered on around the outer ring of the pump housing 1.
As the preferred embodiment of the present invention, 21 on loam cake 11 and lower cover 12 and diaphragm are equipped with seal ring.
As the preferred embodiment of the present invention, diaphragm 21 is the elastic material diaphragm.
To the mounting type of diaphragm 21 in the pump housing 1 multiple way of realization can be arranged, but need to guarantee the water tightness of the pump housing 1 integral body, when by diaphragm 21 pump housing 1 being divided into loam cake 11 and 12 two lids that separate of lower cover, can seal ring all being set at diaphragm 21 and loam cake 11 and 12 of lower covers and guaranteeing sealing.Also can better ensure the water tightness that it is whole and pump core 2 is fastened in the pump core card holder 7.
Certainly, the invention is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of spirit of the present invention, the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (9)
1. piezoelectric pump, it is characterized in that: comprise the pump housing (1) and be arranged at the described pump housing (1) middle part the pump housing (1) is divided into the water-inlet cavity (3) that is isolated from each other and the pump core (2) of water chamber (4), the described pump housing (1) is upper to be provided with water intake (5) in water-inlet cavity (3) side, the described pump housing (1) is upper to be provided with water outlet (6) in water chamber (4) side, described pump core (2) comprises a diaphragm (21) and is covered on described diaphragm (21) upward or the ring piezoelectric ceramic plate (22) of diaphragm (21) both sides that described diaphragm (21) is provided with some cone shape holes.
2. piezoelectric pump according to claim 1, it is characterized in that: described diaphragm (21) covers the annular distance position of annular piezoelectric ceramic (22) fully, and each cone shape hole all is positioned at the ring position of ring piezoelectric ceramic plate (22).
3. piezoelectric pump according to claim 1 and 2, it is characterized in that: the middle part of described diaphragm (21) is provided with a projection (211), and described each cone shape hole all is positioned on the projection (211).
4. piezoelectric pump according to claim 1 and 2, it is characterized in that: described diaphragm (21) is a smooth diaphragm.
5. piezoelectric pump according to claim 1 and 2, it is characterized in that: the diameter of the cone shape hole water intake of described each cone shape hole is 50～500 μ m, the diameter of the cone shape hole water outlet of described each cone shape hole is 2～50 μ m.
6. piezoelectric pump according to claim 1 and 2, it is characterized in that: the described pump housing (1) comprises loam cake (11) and the lower cover (12) that is fitted to each other, and described pump core (2) is folded between loam cake (11) and the lower cover (12).
7. piezoelectric pump according to claim 6, it is characterized in that: the sectional area of described diaphragm (21) is greater than the sectional area of loam cake (11) and lower cover (12), and described ring piezoelectric ceramic plate (22) is covered on around the outer ring of the pump housing (1).
8. piezoelectric pump according to claim 6 is characterized in that: be equipped with seal ring between described loam cake (11) and lower cover (12) and diaphragm (21).
9. piezoelectric pump according to claim 1 and 2, it is characterized in that: described diaphragm (21) is the elastic material diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442817.5A CN102966520B (en) | 2012-11-07 | 2012-11-07 | A kind of piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442817.5A CN102966520B (en) | 2012-11-07 | 2012-11-07 | A kind of piezoelectric pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102966520A true CN102966520A (en) | 2013-03-13 |
| CN102966520B CN102966520B (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210442817.5A Active CN102966520B (en) | 2012-11-07 | 2012-11-07 | A kind of piezoelectric pump |
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| Country | Link |
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| CN (1) | CN102966520B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195694A (en) * | 2013-04-14 | 2013-07-10 | 苏州科技学院 | Valveless piezoelectric micro pump |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179586B1 (en) * | 1999-09-15 | 2001-01-30 | Honeywell International Inc. | Dual diaphragm, single chamber mesopump |
| CN1378041A (en) * | 2002-05-20 | 2002-11-06 | 张建辉 | High frequency valve piezoelectric pump and its pump chamber design method |
| US20050139797A1 (en) * | 2003-12-30 | 2005-06-30 | Tzu-Yu Wang | Dual diaphragm valve |
| JP2005214113A (en) * | 2004-01-30 | 2005-08-11 | Casio Comput Co Ltd | Pump device and diaphragm actuator |
| CN1254608C (en) * | 2000-12-22 | 2006-05-03 | Bsh博施及西门子家用器具有限公司 | Dosing device for conveying small amounts of substances |
| JP2007092677A (en) * | 2005-09-29 | 2007-04-12 | Casio Comput Co Ltd | Pump device |
| CN101282792A (en) * | 2005-05-02 | 2008-10-08 | 香港功能陶瓷有限公司 | Piezoelectric fluid atomizer apparatuses and methods |
| CN102459900A (en) * | 2009-06-03 | 2012-05-16 | 技术合伙公司 | Fluid disc pump |
| CN202914281U (en) * | 2012-11-07 | 2013-05-01 | 广州市番禺奥迪威电子有限公司 | Piezoelectric pump |
-
2012
- 2012-11-07 CN CN201210442817.5A patent/CN102966520B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179586B1 (en) * | 1999-09-15 | 2001-01-30 | Honeywell International Inc. | Dual diaphragm, single chamber mesopump |
| CN1254608C (en) * | 2000-12-22 | 2006-05-03 | Bsh博施及西门子家用器具有限公司 | Dosing device for conveying small amounts of substances |
| CN1378041A (en) * | 2002-05-20 | 2002-11-06 | 张建辉 | High frequency valve piezoelectric pump and its pump chamber design method |
| US20050139797A1 (en) * | 2003-12-30 | 2005-06-30 | Tzu-Yu Wang | Dual diaphragm valve |
| JP2005214113A (en) * | 2004-01-30 | 2005-08-11 | Casio Comput Co Ltd | Pump device and diaphragm actuator |
| CN101282792A (en) * | 2005-05-02 | 2008-10-08 | 香港功能陶瓷有限公司 | Piezoelectric fluid atomizer apparatuses and methods |
| JP2007092677A (en) * | 2005-09-29 | 2007-04-12 | Casio Comput Co Ltd | Pump device |
| CN102459900A (en) * | 2009-06-03 | 2012-05-16 | 技术合伙公司 | Fluid disc pump |
| CN202914281U (en) * | 2012-11-07 | 2013-05-01 | 广州市番禺奥迪威电子有限公司 | Piezoelectric pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195694A (en) * | 2013-04-14 | 2013-07-10 | 苏州科技学院 | Valveless piezoelectric micro pump |
| CN103195694B (en) * | 2013-04-14 | 2016-06-08 | 苏州科技学院 | A kind of Valveless piezoelectric micro pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102966520B (en) | 2016-04-06 |
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Address after: 511400, Dongsheng Industrial Zone, east ring street, Guangzhou, Guangdong, Panyu District 9 Patentee after: Prestige sensing Science and Technology Co., Ltd. of Guangdong Audi Address before: 511400, Dongsheng Industrial Zone, east ring street, Guangzhou, Guangdong, Panyu District 9 Patentee before: Guangzhou Panyu Aodiwei Electronic Co., Ltd. |