CN215719393U - Novel asymmetric piezoelectric pump - Google Patents
Novel asymmetric piezoelectric pump Download PDFInfo
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- CN215719393U CN215719393U CN202122307922.5U CN202122307922U CN215719393U CN 215719393 U CN215719393 U CN 215719393U CN 202122307922 U CN202122307922 U CN 202122307922U CN 215719393 U CN215719393 U CN 215719393U
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Abstract
The utility model discloses a novel asymmetric piezoelectric pump, which comprises a shell and a cover body, wherein a quick connecting structure and a sealing structure are arranged between the shell and the cover body, the shell is provided with a water inlet pipeline, a water outlet pipeline, a cavity spacer ring, a pump body assembly, a driving assembly and a positioning structure, and the pump body assembly comprises an upper flow valve, a switch valve and a lower flow valve. The utility model adopts a three-layer pump body assembly structure consisting of the upper flow valve, the switch valve and the lower flow valve, and improves the hole structures on the upper flow valve and the lower flow valve, thereby preventing the occurrence of liquid leakage and effectively improving the liquid supply efficiency and precision; the sealing structure is used for providing double sealing performance, so that the situation that internal pressure is unstable due to air leakage is prevented, the stability of the action of the internal pump body assembly is ensured, and the normal use and the liquid transportation precision of the novel asymmetric piezoelectric pump are ensured; through setting up a plurality of through-holes two, a plurality of through-hole one and expanding the pore and be used for improving the feed liquor volume, improve liquid transport efficiency.
Description
Technical Field
The utility model relates to the technical field of piezoelectric pumps, in particular to a novel asymmetric piezoelectric pump.
Background
The piezoelectric pump designed based on the piezoelectric vibrator plays an important role in industrial production and scientific research tests at present. The piezoelectric pump can be used for conveying trace liquid, the operation is reliable, the amount of the conveyed liquid, the conveying time and the like can be effectively controlled, and the requirement of micro-precise control can be effectively improved. Therefore, the development of piezoelectric pumps is receiving more and more attention.
The existing piezoelectric pump generally comprises a cover body, a shell and a pump body assembly, wherein the pump body assembly is arranged in a cavity formed between the cover body and the shell, and because a positioning structure is not arranged between the pump body assembly and the cavity, the pump body assembly is difficult to produce and assemble, and the pump body assembly is easy to deviate or misaligned in position in the assembling process, so that the pump body assembly is unsmooth in working or air leakage and liquid leakage occur, and the liquid supply efficiency and precision of the piezoelectric pump are influenced; most of existing piezoelectric pumps adopt a double-layer structure of a switch valve and a flow valve, wherein the diameter of a water inlet hole structure cannot be too large, otherwise the flow valve is opened downwards, the phenomenon of liquid leakage occurs, the phenomenon of unbalanced liquid inlet and outlet or insufficient liquid inlet is easily caused, the liquid supply efficiency of the piezoelectric pump is influenced, and the existing piezoelectric pump is only provided with one water inlet, the water inlet efficiency is slow, and the liquid supply efficiency is influenced; the existing piezoelectric pump is poor in sealing performance, only seals through a single sealing ring, and the situation that the sealing ring is abraded after long-time use occurs, so that the sealing performance of an internal cavity is reduced, the air leakage situation occurs, the normal work of a switch valve is affected due to insufficient pressure, and the subsequent liquid supply efficiency and precision are affected.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel asymmetric piezoelectric pump to present technical insufficiency.
The technical scheme adopted by the utility model for realizing the purpose is as follows:
a novel asymmetric piezoelectric pump comprises a shell and a cover body, wherein a quick connection structure and a sealing structure are arranged between the shell and the cover body, the shell is provided with a water inlet pipeline, a water outlet pipeline and a pump cavity, a pump body assembly is arranged in the pump cavity, a driving assembly is arranged above the pump body assembly, a cavity spacer ring is arranged between the pump body assembly and the driving assembly, and a positioning structure is arranged between the pump cavity and the pump body assembly;
the drive assembly comprises a piezoelectric ceramic piece and an electrode piece, the electrode piece is arranged above the piezoelectric ceramic piece, the pump body assembly comprises an upper flow valve, a switch valve and a lower flow valve, the upper flow valve is arranged below the cavity spacer ring, the switch valve is arranged below the upper flow valve, and the lower flow valve is arranged below the switch valve.
The further improvement is that the cover body is provided with a concave cavity and two positioning columns, the shell is provided with two positioning holes, the two positioning columns are respectively matched and connected with the positioning holes, the quick connection structure comprises a plurality of buckles and a plurality of buckles, the buckles are arranged on the two side surfaces of the cover body in a mirror image opposite mode, the buckles are arranged on the two side surfaces of the shell in a mirror image opposite mode, the sealing structure comprises a first annular groove, a second annular groove, a first annular lug and a second annular lug, the first and second annular grooves are provided inside the edge of the upper surface of the housing, the second annular groove is arranged on the inner side of the first annular groove, the first annular bump and the second annular bump are arranged at the bottom of the cover body, and the second annular bump is arranged on the inner side of the first annular bump.
The improved water outlet device is characterized in that the shell is further provided with an annular pipeline and a central pore passage, the central pore passage is arranged at the central position of the shell and is communicated with the water outlet pipeline, the annular pipeline is arranged beside the central pore passage and is communicated with the water inlet pipeline, the annular pipeline is of a semi-arc structure, and the annular pipeline is provided with two expansion pore passages.
The positioning structure comprises a plurality of positioning lugs and a plurality of positioning grooves, the plurality of positioning lugs are respectively arranged on the sides of the cavity space ring, the upper flow valve, the switch valve and the lower flow valve, and the positioning grooves are arranged on the inner side surface of the pump cavity.
The improved structure is characterized in that the pump cavity is further provided with a first positioning column group and a second positioning column group, the first positioning column group is distributed on the inner end face of the edge of the pump cavity in a circular array mode through a plurality of first positioning columns, the second positioning column group is distributed on the pump cavity end face of the outer end of the central hole channel in a circular array mode through a plurality of second positioning columns, the upper flow valve, the switch valve and the lower flow valve are respectively provided with the first positioning hole group and the second positioning hole group, the first positioning hole group is composed of a plurality of first positioning holes distributed in a circular array mode, the second positioning hole group is composed of a plurality of second positioning holes distributed in a circular array mode, the first positioning holes of the first positioning hole group penetrate into the first positioning columns of the first positioning column group respectively, and the second positioning holes of the second positioning hole group penetrate into the second positioning columns of the second positioning column group respectively.
The thickness of the upper flow valve and the lower flow valve is 0.2-2mm, and the thickness of the switch valve is 0.2-2 mm.
In a further improvement, the upper flow valve is provided with a first central through hole and a plurality of first through holes, the first central through hole is arranged at the central position of the upper flow valve, the plurality of first through holes are arranged on the side of the first central through hole in an annular array mode, the lower flow valve is provided with a second central through hole and a plurality of second through holes, the second central through hole is arranged at the central position of the lower flow valve, the plurality of second through holes are arranged on the side of the second central through hole in an annular array mode, the switch valve is provided with a first central valve and a plurality of first valves, the central valve is arranged at the central position of the switch valve, and the plurality of first valves are arranged on the side of the central valve in an annular array mode.
The improved structure is characterized in that the central axis of the first central through hole, the central axis of the second central through hole and the central axis of the central valve are all on the same axis, the first through hole, the second through hole and the first valve are matched in a one-to-one correspondence mode and are on the same central axis, the central valve and the valves are formed by the third through hole and the movable sheet, the movable sheet is arranged in the third through hole and is provided with a plurality of connecting blocks, and the movable sheet is fixed in the third through hole through the connecting blocks.
In a further improvement, the diameter of the first central through hole is smaller than that of the second central through hole, and the diameter of the first through hole is larger than that of the second through hole.
The utility model has the beneficial effects that: the three-layer pump body assembly structure formed by the upper flow valve, the switch valve and the lower flow valve is arranged, and the hole structures on the upper flow valve and the lower flow valve are improved, so that the liquid leakage is prevented, and the liquid supply efficiency and precision are effectively improved; the cavity washer is arranged to form the top cavity, so that the driving assembly can change the pressure of the top cavity conveniently, a moving space is provided for the pump body assembly, and the working efficiency of the pump body assembly is improved; the sealing structure is used for providing double sealing performance, so that the situation that internal pressure is unstable due to air leakage is prevented, the stability of the action of the internal pump body assembly is ensured, and the normal use and the liquid transportation precision of the novel asymmetric piezoelectric pump are ensured; multiple positioning is realized by arranging the positioning structure, the first positioning column group, the second positioning column group, the first positioning hole group and the second positioning hole group, the pump body assembly is convenient to install in the shell, and the assembling precision is improved. The production and assembly efficiency is improved, and meanwhile, the position of the pump body assembly is ensured, and displacement cannot occur during movement, so that the condition of liquid leakage is prevented, the liquid conveying precision and efficiency are ensured, and the normal use of the novel asymmetric piezoelectric pump is ensured; the liquid inlet amount is increased by arranging the plurality of second through holes, the plurality of first through holes and the expansion pore channel, so that the liquid conveying efficiency is improved; through setting up quick connection structure be convenient for the high-speed joint between lid and the casing or dismantle the action to be convenient for maintain the change to the inside spare part of novel asymmetric piezoelectric pump.
The utility model is further described with reference to the following detailed description and accompanying drawings.
Drawings
Fig. 1 is a schematic overall structure diagram of the novel asymmetric piezoelectric pump according to the present embodiment;
fig. 2 is an exploded view of the novel asymmetric piezoelectric pump of the present embodiment;
FIG. 3 is a schematic diagram of a cover structure according to the present embodiment;
FIG. 4 is a schematic view of the housing structure of the present embodiment;
fig. 5 is a schematic structural view of the on-off valve of the present embodiment.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.
In the embodiment, referring to fig. 1 to 5, a novel asymmetric piezoelectric pump 1 includes a casing 2 and a cover 3, a quick connection structure 4 and a sealing structure are disposed between the casing 2 and the cover 3, the casing 2 is provided with a water inlet pipe 20, a water outlet pipe 21 and a pump cavity 22, a pump body assembly 6 is disposed in the pump cavity 22, a driving assembly 7 is disposed above the pump body assembly 6, a cavity spacer 8 is disposed between the pump body assembly 6 and the driving assembly 7, a positioning structure 9 is disposed between the pump cavity 22 and the pump body assembly 6, the driving assembly 7 includes a piezoelectric ceramic plate 70 and an electrode plate 71, the electrode plate 71 is disposed above the piezoelectric ceramic plate 71, the electrode plate 71 is provided with a lead, the cover 3 is provided with a wire opening, the lead is connected to an external power supply through the wire opening of the novel asymmetric piezoelectric pump 1, and the wire opening is provided with a sealant, the electrode plate 71 is used for driving the piezoelectric ceramic plate 71 to vibrate to form pressure so as to control the pump body assembly 6 to act to perform liquid conveying action, the pump body assembly 6 comprises an upper flow valve 60, an on-off valve 61 and a lower flow valve 62, the upper flow valve 60 is arranged below the cavity spacer ring 8, the on-off valve 61 is arranged below the upper flow valve 60, the lower flow valve 62 is arranged below the on-off valve 61, and the cavity gasket 8 is used for forming a top cavity, so that the driving assembly 7 can change the pressure of the top cavity, and the movement of the pump body assembly 6 is controlled.
The cover 3 is provided with a cavity 30 and two positioning columns 31, the casing 2 is provided with two positioning holes 23, two positioning columns 31 are respectively in the positioning holes 23 for matching connection, the positioning columns 31 and the positioning holes 23 are convenient for fast matching positioning connection between the cover 3 and the casing 2, and are convenient for assembly, and meanwhile, the position alignment between the cover 3 and the casing 2 is ensured to ensure sealing performance, the fast connection structure 4 comprises a plurality of hooks 40 and a plurality of catching grooves 41, the hooks 40 are arranged on two side surfaces of the cover 3 in a mirror image relative mode, the catching grooves 41 are arranged on two side surfaces of the casing 2 in a mirror image relative mode, the fast connection structure 4 is convenient for fast connection or disassembly between the cover 3 and the casing 2, so as to facilitate maintenance and replacement of parts inside the novel asymmetric piezoelectric pump 1, and the sealing structure comprises a first annular groove 50, A second annular groove 51, a first annular projection 52 and a second annular projection 53, the first annular groove 50 and the second annular groove 51 being provided inside the edge of the upper surface of the housing 2, the second annular groove 51 is disposed inside the first annular groove 50, the first annular projection 52 and the second annular projection 53 are disposed on the bottom of the lid body 3, the second annular protrusion 53 is disposed inside the first annular protrusion 52, the first annular groove 50 and the second annular groove 51 are both provided with sealing rings, the first annular projection 52 is in fit connection with the first annular groove 50, the second annular projection 53 is in fit connection with the second annular groove 51, the sealing structure is used for providing double sealing, thereby guarantee the stability of the action of inside pump body subassembly 6, guarantee the precision of normal use and the liquid transportation of novel asymmetric piezoelectric pump 1.
The casing 2 is further provided with an annular pipeline 23 and a central pore passage 24, the central pore passage 24 is arranged at the central position of the casing 2, the central pore passage 24 is communicated with the water outlet pipeline 21, the annular pipeline 23 is arranged beside the central pore passage 24, the annular pipeline 23 is communicated with the water inlet pipeline 20, the annular pipeline 23 is of a semi-arc structure, the annular pipeline 23 is provided with two expansion pore passages 230, the annular pipeline 23 is used for feeding liquid, the central pore passage 24 is used for feeding out the liquid inside, and the annular pipeline 23 improves the liquid inlet amount, so that the liquid conveying efficiency is improved.
The pump cavity 22 is further provided with a first positioning column group 25 and a second positioning column group 26, the first positioning column group 25 is formed by distributing a plurality of first positioning columns on the inner end face of the edge of the pump cavity 22 in a circular array mode, the second positioning column group 26 is formed by distributing a plurality of second positioning columns on the end face of the pump cavity 22 at the outer end of the central hole channel 24 in a circular array mode, the upper flow valve 60, the switch valve 61 and the lower flow valve 62 are respectively provided with a first positioning hole group 27 and a second positioning hole group 28, the first positioning hole group 27 is formed by distributing a plurality of first positioning holes in a circular array mode, the second positioning hole group 28 is formed by distributing a plurality of second positioning holes in a circular array mode, the first positioning holes of the first positioning hole group 27 respectively penetrate into the first positioning columns of the first positioning column group 25, the second positioning holes of the second positioning hole group 28 respectively penetrate into the second positioning columns of the second positioning column group 26, the first positioning column group 25 and the second positioning column group 26 are used for improving the upper flow valve 60, The installation efficiency of the switch valve 61 and the lower flow valve 62 is convenient for subsequent automatic production, the installation positions of the upper flow valve 60, the switch valve 61 and the lower flow valve 62 are ensured, and the upper flow valve 60, the switch valve 61 and the lower flow valve 62 are ensured not to shift during movement, so that the liquid leakage is prevented, and the liquid conveying precision and efficiency are ensured.
The thickness of the upper flow valve 60 and the lower flow valve 62 is 0.2-2mm, the thickness of the switch valve 61 is 0.2-2mm, the upper flow valve 60 is provided with a central through hole one 600 and a plurality of through holes one 601, the central through hole one 600 is arranged at the central position of the upper flow valve 60, the plurality of through holes one 601 are arranged at the side of the central through hole one 600 in an annular array manner, the lower flow valve 62 is provided with a central through hole two 620 and a plurality of through holes two 621, the central through hole two 620 is arranged at the central position of the lower flow valve 62, the plurality of through holes two 621 are arranged at the side of the central through hole two 621 in an annular array manner, the switch valve 61 is provided with a central valve 610 and a plurality of valves one 611, the central valve 610 is arranged at the central position of the switch valve 61, the plurality of valves one 611 are arranged at the side of the central valve 610 in an annular array manner, the central axis of the first central through hole 600, the central axis of the second central through hole 620 and the central axis of the central valve 610 are all on the same axis, the first through hole 601, the second through hole 621 and the first valve 611 are in one-to-one corresponding fit, and on the same central axis, the central valve 610 and the valves 611 are both formed by a third through hole 6100 and a movable sheet 6101, the movable sheet 6101 is arranged in the third through hole 6100, the movable sheet 6101 is provided with a plurality of connecting blocks 6102, the movable sheet 6101 is fixed in the third through hole 6100 through the plurality of connecting blocks 6102, and the movable sheet 6101 is used for realizing ascending or descending action under the action of pressure, so as to realize opening or closing action of the central valve 610 and the valves 611, thereby realizing water inlet-outlet action by matching the upper flow valve 60 and the lower flow valve 61, and realizing liquid conveying action.
The diameter of the first through hole 600 is smaller than that of the second through hole 620, and the diameter of the first through hole 601 is larger than that of the second through hole 621.
The three-layer pump body assembly structure formed by the upper flow valve, the switch valve and the lower flow valve is arranged, and the hole structures on the upper flow valve and the lower flow valve are improved, so that the liquid leakage is prevented, and the liquid supply efficiency and precision are effectively improved; the cavity washer is arranged to form the top cavity, so that the driving assembly can change the pressure of the top cavity conveniently, a moving space is provided for the pump body assembly, and the working efficiency of the pump body assembly is improved; the sealing structure is used for providing double sealing performance, so that the situation that internal pressure is unstable due to air leakage is prevented, the stability of the action of the internal pump body assembly is ensured, and the normal use and the liquid transportation precision of the novel asymmetric piezoelectric pump are ensured; multiple positioning is realized by arranging the positioning structure, the first positioning column group, the second positioning column group, the first positioning hole group and the second positioning hole group, the pump body assembly is convenient to install in the shell, and the assembling precision is improved. The production and assembly efficiency is improved, and meanwhile, the position of the pump body assembly is ensured, and displacement cannot occur during movement, so that the condition of liquid leakage is prevented, the liquid conveying precision and efficiency are ensured, and the normal use of the novel asymmetric piezoelectric pump is ensured; the liquid inlet amount is increased by arranging the plurality of second through holes, the plurality of first through holes and the expansion pore channel, so that the liquid conveying efficiency is improved; through setting up quick connection structure be convenient for the high-speed joint between lid and the casing or dismantle the action to be convenient for maintain the change to the inside spare part of novel asymmetric piezoelectric pump.
The working principle of the utility model is as follows: when the novel asymmetric piezoelectric pump works, the electrode plate supplies power to the piezoelectric ceramic piece, the piezoelectric ceramic piece generates vibration under the excitation of an electric signal and influences the pressure of a top cavity of the novel asymmetric piezoelectric pump, namely when the piezoelectric ceramic piece vibrates upwards, the internal pressure of the top cavity formed by the cavity gasket is reduced, all movable pieces of the switch valve move upwards simultaneously, and because the diameter of a central through hole of the upper flow valve is small and the diameter of a peripheral through hole I is large, the movable pieces of the central valve of the switch valve cannot move upwards, the movable pieces of the peripheral valve can move upwards to realize opening action, and water flow presses the novel asymmetric piezoelectric pump from a water inlet pipeline to realize water inlet action; when the piezoelectric ceramic plate vibrates downwards, the internal pressure of a top cavity formed by the cavity gasket is increased, all movable plates of the switch valve move downwards simultaneously, and because the diameter of the central through hole II of the lower flow valve is large, and the diameter of the peripheral through hole II is small, the movable plates of the peripheral valves of the switch valve cannot move downwards, the movable plates of the central valves can move downwards to realize opening action, water flows to a central pore passage from the central through hole, and then the water flows away from the water outlet pipeline to form the novel asymmetric piezoelectric pump, so that water outlet action is realized.
When the novel asymmetric piezoelectric pump performs the reciprocating motion, continuous water inlet-outlet actions can be realized. The water inflow and the water outflow in unit time can be controlled by controlling the vibration frequency of the piezoelectric ceramic piece, and the accurate control of the liquid flow is realized.
The present invention is not limited to the above embodiments, and other asymmetric piezoelectric pumps for use in the present invention, which have the same or similar structure or device as the above embodiments of the present invention, are within the protection scope of the present invention.
Claims (9)
1. A novel asymmetric piezoelectric pump is characterized in that: the novel asymmetric piezoelectric pump comprises a shell and a cover body, wherein a quick connection structure and a sealing structure are arranged between the shell and the cover body, the shell is provided with a water inlet pipeline, a water outlet pipeline and a pump cavity, a pump body assembly is arranged in the pump cavity, a driving assembly is arranged above the pump body assembly, a cavity spacer ring is arranged between the pump body assembly and the driving assembly, and a positioning structure is arranged between the pump cavity and the pump body assembly;
the drive assembly comprises a piezoelectric ceramic piece and an electrode piece, the electrode piece is arranged above the piezoelectric ceramic piece, the pump body assembly comprises an upper flow valve, a switch valve and a lower flow valve, the upper flow valve is arranged below the cavity spacer ring, the switch valve is arranged below the upper flow valve, and the lower flow valve is arranged below the switch valve.
2. A novel asymmetric piezoelectric pump as defined in claim 1, wherein: the cover body is provided with a concave cavity and two positioning columns, the shell is provided with two positioning holes, the two positioning columns are respectively matched and connected with the positioning holes, the quick connection structure comprises a plurality of buckles and a plurality of buckles, the buckles are arranged on the two side surfaces of the cover body in a mirror image opposite mode, the buckles are arranged on the two side surfaces of the shell in a mirror image opposite mode, the sealing structure comprises a first annular groove, a second annular groove, a first annular lug and a second annular lug, the first and second annular grooves are provided inside the edge of the upper surface of the housing, the second annular groove is arranged on the inner side of the first annular groove, the first annular bump and the second annular bump are arranged at the bottom of the cover body, and the second annular bump is arranged on the inner side of the first annular bump.
3. A novel asymmetric piezoelectric pump as defined in claim 2, wherein: the shell is further provided with an annular pipeline and a central hole passage, the central hole passage is arranged at the central position of the shell and communicated with the water outlet pipeline, the annular pipeline is arranged beside the central hole passage and communicated with the water inlet pipeline, the annular pipeline is of a semi-arc structure, and the annular pipeline is provided with two expansion hole passages.
4. A novel asymmetric piezoelectric pump as defined in claim 3, wherein: the positioning structure comprises a plurality of positioning lugs and positioning grooves, the positioning lugs are arranged on the sides of the cavity space ring, the upper flow valve, the switch valve and the lower flow valve respectively, and the positioning grooves are arranged on the inner side surface of the pump cavity.
5. A novel asymmetric piezoelectric pump as defined in claim 4, wherein: the pump cavity still is equipped with first locating column group and second locating column group, first locating column group distributes with circular array's mode by a plurality of reference columns on the terminal surface in the pump cavity edge, second locating column group distributes with circular array's mode by a plurality of reference columns on the pump cavity terminal surface of centre pore outer end, it all is equipped with first locating hole group and second locating hole group to go up flow valve, ooff valve and down flow valve, first locating hole group comprises a plurality of locating hole one that distribute with circular array, second locating hole group comprises a plurality of locating hole two that distribute with circular array, first locating hole of first locating hole group penetrates respectively in first locating column of first locating column group, second locating hole of second locating hole group penetrates respectively in second locating column of second locating column group.
6. A novel asymmetric piezoelectric pump as defined in claim 5, wherein: the thickness of the upper flow valve and the lower flow valve is 0.2-2mm, and the thickness of the switch valve is 0.2-2 mm.
7. A novel asymmetric piezoelectric pump as defined in claim 6, wherein: the upper flow valve is provided with a first central through hole and a plurality of first through holes, the first central through hole is arranged at the central position of the upper flow valve, the plurality of first through holes are arranged on the side of the first central through hole in an annular array mode, the lower flow valve is provided with a second central through hole and a second plurality of through holes, the second central through hole is arranged at the central position of the lower flow valve, the second plurality of through holes are arranged on the side of the second central through hole in an annular array mode, the switch valve is provided with a first central valve and a first plurality of valves, the central valve is arranged at the central position of the switch valve, and the first valves are arranged on the side of the central valve in an annular array mode.
8. A novel asymmetric piezoelectric pump as defined in claim 7, wherein: the central axis of central through-hole one, the central axis of central through-hole two and the central axis of central valve are all on same axis, through-hole one, through-hole two and valve one-to-one cooperation to on same central axis, central valve and a plurality of valve constitute by through-hole three and movable plate, the movable plate sets up in the through-hole three, the movable plate is equipped with a plurality of connecting blocks, the movable plate is fixed through a plurality of connecting blocks in the through-hole three.
9. A novel asymmetric piezoelectric pump as defined in claim 8, wherein: the diameter of the first central through hole is smaller than that of the second central through hole, and the diameter of the first through hole is larger than that of the second through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122307922.5U CN215719393U (en) | 2021-09-23 | 2021-09-23 | Novel asymmetric piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122307922.5U CN215719393U (en) | 2021-09-23 | 2021-09-23 | Novel asymmetric piezoelectric pump |
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| Publication Number | Publication Date |
|---|---|
| CN215719393U true CN215719393U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122307922.5U Active CN215719393U (en) | 2021-09-23 | 2021-09-23 | Novel asymmetric piezoelectric pump |
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| CN (1) | CN215719393U (en) |
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2021
- 2021-09-23 CN CN202122307922.5U patent/CN215719393U/en active Active
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