CN102966520B - A kind of piezoelectric pump - Google Patents
A kind of piezoelectric pump Download PDFInfo
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- CN102966520B CN102966520B CN201210442817.5A CN201210442817A CN102966520B CN 102966520 B CN102966520 B CN 102966520B CN 201210442817 A CN201210442817 A CN 201210442817A CN 102966520 B CN102966520 B CN 102966520B
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- pump housing
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Abstract
The invention discloses a kind of piezoelectric pump, comprise the pump housing and be arranged at the pump core in the middle part of the pump housing, the pump housing being divided into water-inlet cavity and the water chamber be isolated from each other, the pump housing is provided with water intake in water-inlet cavity side, the pump housing is provided with water outlet in water chamber side, pump core comprises a diaphragm and is covered on diaphragm or the ring-shaped piezo ceramic sheet of diaphragm both sides, and diaphragm is provided with some cone shape holes.This piezoelectric pump in the course of the work, ring-shaped piezo ceramic sheet passes through wire connecting power, diaphragm shrinking to water-inlet cavity and water chamber both sides in pump body rhythm, thus make the water suction of water-inlet cavity rhythm, and the discharging water of water chamber rhythm, thus realize the water supply effect of water pump, the some cone shape holes simultaneously diaphragm arranged can finely control the current by the pump housing, thus realize the meticulous interpolation of liquid, and this piezoelectric pump structure is simple, easy to operate, this invention is used for piezoelectric constant field.
Description
Technical field
The present invention relates to 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 additional drives motor, but utilize the inverse piezoelectric effect of piezoelectric constant to make piezoelectric vibrator produce distortion, then realized fluid output by the volume-variation of distortion generation pump chamber or utilized piezoelectric vibrator to produce fluctuation carrying out fluid transfer.
Piezoelectric pump is in the past made up of piezoelectric vibrator, pump valve and the pump housing, and in the working procedure of piezoelectric pump, when piezoelectric vibrator two ends apply ac power supply, piezoelectric vibrator is radial compression under electric field action, inner generation tensile stress, thus makes piezoelectric vibrator bending deflection.When piezoelectric vibrator forward bends, piezoelectric vibrator extends, and pump chamber increases, and cavity fluid pressure reduces, and pump valve is opened, and liquid enters pump chamber; When piezoelectric vibrator is 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 needs all to arrange pump valve at its influent side and water outlet side usually, and in order to realize the precise controlling to pump duty, its structure can be caused very complicated, and manufacture and maintenance cost all higher.
Summary of the invention
For solving the problem, the invention provides a kind of can precise controlling pump duty and simple, the easy to operate piezoelectric pump of structure.
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 core in the middle part of the pump housing, the pump housing being divided into water-inlet cavity and the water chamber be isolated from each other, the pump housing is provided with water intake in water-inlet cavity side, the pump housing is provided with water outlet in water chamber side, pump core comprises a diaphragm and is covered on above diaphragm or the ring-shaped piezo ceramic sheet of diaphragm both sides, and 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 completely, and each cone shape hole is all positioned at the ring position of ring-shaped piezo ceramic sheet.
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 is all positioned in 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 μm, and the diameter of the cone shape hole water outlet of each cone shape hole is 2 ~ 50 μm.
Be further used as the improvement of technical solution of the present invention, the pump housing comprises the upper cover and lower cover that are fitted to each other, and pump core is folded between upper cover and 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 upper cover and lower cover, and ring-shaped piezo ceramic sheet is covered on the outer ring surrounding of the pump housing.
Be further used as the improvement of technical solution of the present invention, upper cover and be equipped with seal ring between lower cover and diaphragm.
Be further used as the improvement of technical solution of the present invention, diaphragm is elastic material diaphragm.
Beneficial effect of the present invention: this piezoelectric pump in the course of the work, ring-shaped piezo ceramic sheet passes through wire connecting power, diaphragm shrinking to water-inlet cavity and water chamber both sides in pump body rhythm, thus make the water suction of water-inlet cavity rhythm, and the discharging water of water chamber rhythm, thus realizing the water supply effect of water pump, the some cone shape holes simultaneously diaphragm arranged can finely control pump duty, thus realize the meticulous interpolation of liquid, and this piezoelectric pump structure is simple, easy to operate.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is first embodiment of the invention overall structure schematic diagram;
Fig. 2 is second embodiment of the invention overall structure schematic diagram;
Fig. 3 is pump cored structure first embodiment overall structure schematic diagram in the present invention;
Fig. 4 is pump cored structure second embodiment overall structure schematic diagram in the present invention;
Fig. 5 is pump cored structure the 3rd embodiment's overall structure schematic diagram in the present invention;
Fig. 6 is pump cored structure the 4th embodiment's overall structure schematic diagram in the present invention;
Fig. 7 is the upper conical hole structure schematic diagram 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 core 2 in the middle part of the pump housing 1, the pump housing 1 being divided into the water-inlet cavity 3 and water chamber 4 be isolated from each other, the pump housing 1 is provided with water intake 5 in water-inlet cavity 3 side, the pump housing 1 is provided with water outlet 6 in water chamber 4 side, pump core 2 comprises a diaphragm 21 and is covered on above diaphragm 21 or the ring-shaped piezo ceramic sheet 22 of diaphragm 21 both sides, and diaphragm 21 is provided with some cone shape holes.
This piezoelectric pump in the course of the work, ring-shaped piezo ceramic sheet 22 passes through wire connecting power, diaphragm 21 is in inner rhythmic the shrinking to water-inlet cavity 3 and water chamber 4 both sides of the pump housing 1, thus make the water suction of water-inlet cavity 3 rhythm, and the discharging water of water chamber 4 rhythm, thus realizing the water supply effect of water pump, the some cone shape holes simultaneously diaphragm 21 arranged can finely control the current by the pump housing 1, thus realize the meticulous interpolation of liquid, and this piezoelectric pump structure is simple, easy to operate.
This piezoelectric pump can realize low-voltage driving, and drive voltage range is 3 ~ 20V, and this piezoelectricity pump structure is very simple simultaneously, makes the volume of himself can be very little.The ultraprecise that this piezoelectric pump can realize flow controls, and it can show 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 completely, and each cone shape hole is all positioned at the ring position of ring-shaped piezo ceramic sheet 22.The middle part of diaphragm 21 is provided with a projection 211, and each cone shape hole is all positioned on protruding 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 μm, and the diameter of the cone shape hole water outlet of each cone shape hole is 2 ~ 50 μm.
The size and number of each cone shape hole can be arranged as required, carries out to the aperture of each cone shape hole on diaphragm 21 quantity arranging the cone shape hole that can change on diaphragm 21.Meanwhile, the tiny flow quantity by piezoelectric pump can be controlled by the change in aperture, diaphragm 21 upper conical hole, thus realize the meticulous interpolation of liquid.
As the preferred embodiment of the present invention, the pump housing 1 comprises the upper cover 11 and lower cover 12 that are fitted to each other, and pump core 2 is folded between upper cover 11 and lower cover 12.
As the preferred embodiment of the present invention, the sectional area of diaphragm 21 is greater than the sectional area of upper cover 11 and lower cover 12, and ring-shaped piezo ceramic sheet 22 is covered on the outer ring surrounding of the pump housing 1.
As the preferred embodiment of the present invention, upper cover 11 and be equipped with seal ring between lower cover 12 and diaphragm 21.
As the preferred embodiment of the present invention, diaphragm 21 is elastic material diaphragm.
Multiple way of realization can be had to the mounting type of diaphragm 21 in the pump housing 1, but the water tightness of the pump housing 1 entirety need be ensured, when the lid being divided into upper cover 11 and lower cover 12 two to separate the pump housing 1 by diaphragm 21, and all can arrange seal ring to ensure between upper cover 11 and lower cover 12 and seal at diaphragm 21.And pump core 2 is fastened on the water tightness that also better can ensure its entirety in 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 without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (4)
1. a piezoelectric pump, it is characterized in that: comprise the pump housing (1) and be arranged at the pump core (2) that the pump housing (1) is divided into water-inlet cavity (3) and the water chamber (4) be isolated from each other by the described pump housing (1) middle part, the described pump housing (1) is provided with water intake (5) in water-inlet cavity (3) side, the described pump housing (1) is provided with water outlet (6) in water chamber (4) side, described pump core (2) comprises a diaphragm (21) and is covered on above described diaphragm (21) or the ring-shaped piezo ceramic sheet (22) of diaphragm (21) both sides, described diaphragm (21) is provided with some cone shape holes, the diameter of the cone shape hole water intake of each described cone shape hole is 50 ~ 500 μm, the diameter of the cone shape hole water outlet of each described cone shape hole is 2 ~ 50 μm, the described pump housing (1) comprises the upper cover (11) and lower cover (12) that are fitted to each other, described pump core (2) is folded between upper cover (11) and lower cover (12), the sectional area of described diaphragm (21) is greater than the sectional area of upper cover (11) and lower cover (12), described ring-shaped piezo ceramic sheet (22) is covered on the outer ring surrounding of the pump housing (1), described diaphragm (21) is that the middle part of a smooth diaphragm or diaphragm (21) is provided with a projection (211), described each cone shape hole is all positioned in projection (211).
2. piezoelectric pump according to claim 1, is characterized in that: described diaphragm (21) covers the annular distance position of annular piezoelectric ceramic (22) completely, and each cone shape hole is all positioned at the ring position of ring-shaped piezo ceramic sheet (22).
3. piezoelectric pump according to claim 1 and 2, is characterized in that: described upper cover (11) and be equipped with seal ring between lower cover (12) and diaphragm (21).
4. piezoelectric pump according to claim 1 and 2, is characterized in that: described diaphragm (21) is 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 CN102966520A (en) | 2013-03-13 |
| CN102966520B true CN102966520B (en) | 2016-04-06 |
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| 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195694B (en) * | 2013-04-14 | 2016-06-08 | 苏州科技学院 | A kind of Valveless piezoelectric micro pump |
Citations (6)
| 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 |
| 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 |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6991213B2 (en) * | 2003-12-30 | 2006-01-31 | Honeywell International Inc. | Dual diaphragm valve |
| JP4586371B2 (en) * | 2004-01-30 | 2010-11-24 | カシオ計算機株式会社 | Pump device and diaphragm actuator |
| JP2007092677A (en) * | 2005-09-29 | 2007-04-12 | Casio Comput Co Ltd | Pump device |
-
2012
- 2012-11-07 CN CN201210442817.5A patent/CN102966520B/en active Active
Patent Citations (6)
| 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 |
| 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 |
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| CN102966520A (en) | 2013-03-13 |
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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. |