Piezoelectric pump with drive

Abstract

The utility model provides a piezoelectric pump with a driving function, which comprises a piezoelectric pump body and a driving plate, the piezoelectric pump body is electrically connected with the driving plate, the driving plate is fixedly connected on the end surface of the piezoelectric pump body, and a certain gap is formed between the connecting surfaces of the driving plate and the piezoelectric pump body after connection. The gap is filled with a heat insulation material layer. According to the utility model, the integral structure is more compact, the occupied space is small, the connection is convenient, the consistency and performance of the product can be better guaranteed, and the popularization and application value is higher.

Description

Technical Field

[0001] The utility model relates to the field of fluid drivers, and particularly to a piezoelectric pump with a driver. Background Art

[0002] A piezoelectric pump is a new type of fluid driver. Due to its advantages such as simple structure for mass production, small size for miniaturization, easy digital control, and long service life, it has a wide application prospect in the fields of instruments and meters, detection equipment, and mechatronics. Existing piezoelectric pumps generally require an external driver board to generate high-frequency drive waveforms. The piezoelectric pump and the driver board are in an independent state, and wires and harnesses are needed to connect the piezoelectric pump to a dedicated driver board to work together. In this connection and matching process, the driver board needs to track the optimal operating frequency of the piezoelectric pump and provide suitable drive voltage and current to enable the piezoelectric pump to output the best flow rate and pressure. Only when all parameters are in a reasonable state can the piezoelectric pump provide the best performance and service life. Therefore, there is an urgent need for a piezoelectric pump with a driver to solve the above problems existing in the prior art. Content of the Utility Model

[0003] The purpose of the utility model is to provide a piezoelectric pump with a driver to solve some problems existing in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A piezoelectric pump with a driver includes a piezoelectric pump body and a driver board. An electrical connection is formed between the piezoelectric pump body and the driver board, and the driver board is fixedly connected to the end face of the piezoelectric pump body. After connection, a certain gap is formed between the connection surface of the driver board and the piezoelectric pump body, and a heat-insulating and insulating material layer is filled in the gap.

[0005] Further, the thickness of the gap is more than 1 mm.

[0006] Further, the driver board is fixedly connected to the end face of the piezoelectric pump body by screws;

[0007] Or the driver board and the piezoelectric pump body are connected by a snap-fastening method;

[0008] Or the driver board and the piezoelectric pump body are fixedly connected by bonding.

[0009] Further, the heat-insulating and insulating material layer is a double-sided foam tape, and the driver board and the piezoelectric pump body are fixedly connected by the double-sided foam tape.

[0010] Further, the driver board is provided with a piezoelectric pump electrode interface and an external power supply interface. The piezoelectric pump body is provided with a connecting wire harness, and the connecting wire harness is connected to the piezoelectric pump electrode interface;

[0011] The external power supply interface is connected to an external power supply module.

[0012] Furthermore, the external power supply module is powered by a DC power supply or a lithium battery.

[0013] After adopting the above technical solution, compared with the existing technology, the following beneficial effects are achieved: The piezoelectric pump body and the driving board are fixedly connected to form an integral structure. The driving board and the piezoelectric pump body are in a well-connected state. Only the driving board needs to be supplied with power externally to use the piezoelectric pump. The overall structure is more compact, occupies less space, and is convenient to connect. At the same time, after the driving board and the piezoelectric pump body are connected together, the performance of the piezoelectric pump can be better matched during the testing stage, avoiding the problem that an external driving board needs to adapt to the frequency of the piezoelectric pump. The driving voltage and current can output the best performance and service life, and can better match various parameter indicators. There is no need to spend a long time on debugging, testing, and verification during subsequent use, and the piezoelectric pump structure can be applied faster, which can better ensure the consistency and performance of the product. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 is a structural schematic diagram of the present invention;

[0016] Figure 2 is an exploded structural schematic diagram when the piezoelectric pump body 1 and the driving board 2 in the present invention are fixedly connected by a foam double-sided tape 3;

[0017] Figure 3 is a structural schematic diagram of another way of fixedly connecting between the piezoelectric pump body 1 and the driving board 2 in the present invention.

[0018] Description of the reference numerals: 1, piezoelectric pump body; 11, connection wire harness; 12, connection column; 2, driving board; 21, piezoelectric pump electrode interface; 22, external power supply interface; 23, through hole; 3, foam double-sided tape. Detailed Embodiments

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following further details the present invention in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Aiming at the problems existing in the prior art, the utility model provides a piezoelectric pump with a drive. The following is a detailed description of the utility model in conjunction with the attached drawings.

[0021] Referring to Figures 1 - 3 As shown, the technical solution adopted in this specific embodiment is: a piezoelectric pump with a drive, which specifically includes a piezoelectric pump body 1 and a drive plate 2. The drive plate 2 is fixedly installed on the upper end surface or the lower end surface of the piezoelectric pump body 1.

[0022] After the drive plate 2 is fixedly connected to the end surface of the piezoelectric pump body 1, there is a certain gap (not marked in the figure) between the connection surface of the drive plate 2 and the piezoelectric pump body 1. The thickness of the gap is above 1 mm, and the minimum is set to 1 mm.

[0023] The drive plate 2 can be fixedly connected to the end surface of the piezoelectric pump body 1 through various fixing methods. For example, as Figure 3 shown, the drive plate 2 can be connected to the piezoelectric pump body 1 by means of screw fixation. When the drive plate 2 is fixed to the piezoelectric pump body 1 by this fixing method, a plurality of protruding connection columns 12 are provided on the connection surface between the piezoelectric pump body 1 and the drive plate 2. A screw hole is provided in the connection column 12, and a through hole 23 is penetrated through at the relative position between the drive plate 2 and the connection column 12; or the drive plate 2 and the piezoelectric pump body 1 are fixedly connected by means of snap connection, or the drive plate 2 and the piezoelectric pump body 1 are connected by means of adhesive fixation. Any one of the above-mentioned connection structures of screw, snap or bonding between the two structures is a well-known technology, so the more specific structure will not be described in detail again.

[0024] An insulating material layer is filled in the gap. The piezoelectric pump structure generates a large amount of heat during operation, which will cause obvious changes in the temperature rise of the housing. The piezoelectric ceramic driver is sensitive to temperature rise, so heat insulation and insulation are particularly important. The drive plate 2 itself also involves heat generation during operation. Therefore, there needs to be a certain gap between the drive plate 2 and the piezoelectric pump body 1 to block the influence of the heat generated by the drive plate 2 on the piezoelectric pump structure.

[0025] Preferably, as Figure 2 shown, the insulating material layer is a double-sided foam tape 3. The upper and lower bonding surfaces of the double-sided foam tape 3 are respectively connected to the piezoelectric pump body 1 and the drive plate 2, and the piezoelectric pump body 1 and the drive plate 2 are fixedly connected to each other. The double-sided foam tape 3 has high temperature resistance, can better block the heat transfer between the piezoelectric pump body 1 and the drive plate 2, and at the same time can simplify the fixed connection method between the piezoelectric pump body 1 and the drive plate 2, making the structure more compact. More preferably, the double-sided foam tape 3 uses a high-density double-sided foam tape.

[0026] Specifically, an electrical connection is also formed between the piezoelectric pump body 1 and the drive board 2. Specifically, the tail end of the piezoelectric pump body 1 is provided with a connection wire harness 11. On one side surface of the drive board 2 away from the connection end surface with the piezoelectric pump body 1, a piezoelectric pump electrode interface 21 and an external power supply interface 22 are connected. The connection wire harness 11 is connected to the piezoelectric pump electrode interface 21. Specifically, the connection end of the connection wire harness 11 and the piezoelectric pump electrode interface 21 is provided with terminals, and the connection wire harness 11 is plugged on the piezoelectric pump electrode interface 21 through the terminals to achieve electrical connection with the drive board 2; or the connection wire harness 11 and the piezoelectric pump electrode interface 21 are connected by a welding and fixing method to achieve electrical connection with the drive board 2.

[0027] The external power supply interface 22 is connected to an external power supply module. When the external power supply module starts to supply power, the piezoelectric pump structure starts to work. The voltage driven by the external power supply module is generally a relatively low DC power supply or the drive of a 3.7V lithium battery.

[0028] When specifically setting, the size of the drive board 2 should be close to the housing size of the piezoelectric pump body 1 so that the connection surface between the drive board 2 and the piezoelectric pump body 1 can be better adapted. At the same time, the shape of the drive board 2 matches the external shape of the piezoelectric pump body 1, avoiding the protruding columns on the surface of the piezoelectric pump body 1.

[0029] The piezoelectric pump body 1 and the drive board 2 of the present utility model are fixedly connected to form an integral structure. The drive board 2 and the piezoelectric pump body 1 are in a mutually connected state. Only by providing power to the drive board 2 externally can the piezoelectric pump be used. The overall structure is more compact, occupies less space, and is convenient to connect; at the same time, after the drive board 2 and the piezoelectric pump body 1 are connected together, the performance of the piezoelectric pump can be better matched during the test stage, avoiding the problem that an external drive board still needs to adapt to the frequency of the piezoelectric pump, and the drive voltage and current can output the best performance and service life, and can better match various parameter indicators, without spending a long time on debugging, testing and verification in subsequent use, and can apply the piezoelectric pump structure faster, and can better ensure the consistency and performance of the product.

[0030] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0031] The above are only used to illustrate the technical solution of the present utility model rather than to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present utility model shall be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solution of the present utility model.

Claims

1. A piezoelectric pump with a driver, characterized in that: It includes a piezoelectric pump body and a driving plate. The piezoelectric pump body and the driving plate are electrically connected, and the driving plate is fixedly connected to the end face of the piezoelectric pump body. After the connection, a certain gap is formed between the connecting surfaces of the driving plate and the piezoelectric pump body, and a layer of heat-insulating insulating material is filled in the gap.

2. The belt-driven piezoelectric pump according to claim 1, characterized in that The thickness of the gap is greater than 1 mm.

3. The belt-driven piezoelectric pump according to claim 1, characterized in that The driving plate is fixedly connected to the end surface of the piezoelectric pump body by screws; Or the driving plate and the piezoelectric pump body are connected by snap-fit ​​fixing; Or the driving plate and the piezoelectric pump body are fixed by bonding.

4. The belt-driven piezoelectric pump according to claim 1, characterized in that The heat-insulating material layer is a foam double-sided adhesive tape, and the driving plate and the piezoelectric pump body are fixedly connected by the foam double-sided adhesive tape.

5. The belt-driven piezoelectric pump according to claim 1, characterized in that The driving board is provided with a piezoelectric pump electrode interface and an external power supply interface, and the piezoelectric pump body is provided with a connecting harness, and the connecting harness is connected to the piezoelectric pump electrode interface; The external power supply interface is connected to an external power supply module.

6. The belt-driven piezoelectric pump according to claim 5, characterized in that The external power supply module is powered by a DC power supply or a lithium battery.

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