Piezoelectric micropump structure

Abstract

The utility model discloses a piezoelectric micropump structure, which belongs to the technical field of micropumps and comprises a support part, a micropump body is mounted on the support part, and a pump membrane is arranged on the micropump body. One end of the piezoelectric element is fixed on the supporting piece, and the other end of the piezoelectric element is connected with the pump membrane through a connecting piece, so that the pump membrane is pressed downwards, and a concave surface structure is formed on the surface of the pump membrane. By adjusting the relative position of the connecting piece and the pump membrane, the pump membrane is pressed downwards from the horizontal position, and a concave surface structure is formed on the surface of the pump membrane, so that when the same voltage is applied, the upper stroke and the lower stroke of the pump membrane both meet the use requirements, namely the applied voltage can be further reduced on the premise that the pump membrane of the pump body moves upwards and downwards to reach the same stroke; and power consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of micropump technology, and in particular relates to a piezoelectric micropump structure. Background Technology

[0002] A pump is a device for transporting liquids. Micropump sensors based on MEMS technology (MEMS stands for Micro-Electro-Mechanical System) have smaller size, lower cost, higher accuracy and reliability compared to traditional mechanical pumps. They can realize the injection of sustained-release or micro-volume drugs such as insulin, anesthetics, and analgesics, and are a very promising solution for micro-liquid injection.

[0003] In practical applications of existing micropumps, the piezoelectric element is fixed horizontally at the tail end during the initial installation stage. After being powered on, its vertical displacement remains basically symmetrical. The micropump requires a much greater downward pressure on the piezoelectric element than a greater upward pulling force. This results in the need to apply a voltage much greater than the pulling voltage to the piezoelectric element during the downward stroke to meet the pump body's diaphragm stroke and output requirements. Consequently, the micropump module has excessively high input voltage requirements, leading to excessive power consumption (when powered by a battery, the higher the voltage required to convert a low voltage to a high voltage, the more power is wasted). Furthermore, it requires an excessively high boost ratio from the boost circuit driving the micropump module. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art by providing a piezoelectric micropump structure to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a piezoelectric micropump structure, comprising...

[0006] A support member on which a micropump body is mounted, and a pump diaphragm is provided on the micropump body;

[0007] A piezoelectric element, one end of which is fixed to the support member, and the other end of which is connected to the pump diaphragm through a connector to press the pump diaphragm down and form a concave structure on the surface of the pump diaphragm.

[0008] In a preferred embodiment of this utility model, the support member is a support base, and the support member is provided with a liquid outlet channel and a liquid outlet. The liquid outlet channel is connected to the micropump body so as to discharge liquid through the liquid outlet.

[0009] In a preferred embodiment of this utility model, one end of the piezoelectric element is connected to the support member by a fastener to fix one end of the piezoelectric element.

[0010] In a preferred embodiment of this invention, the piezoelectric element is a piezoelectric ceramic.

[0011] In a preferred embodiment of this utility model, adhesive is provided on the pump diaphragm, and the connector is connected to the pump diaphragm through the adhesive to press the pump diaphragm down.

[0012] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0013] This invention adjusts the relative position of the connector and the pump diaphragm, causing the pump diaphragm to be pressed down from a horizontal position, forming a concave structure on the surface of the pump diaphragm. This allows the pump diaphragm to meet the usage requirements when the same voltage is applied. That is, under the premise that the pump body and pump diaphragm move up and down to achieve the same stroke, the applied voltage can be further reduced, thereby reducing power consumption. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the original micropump structure;

[0016] Figure 2 This is a schematic diagram of the overall structure of a preferred embodiment of the present utility model;

[0017] Figure 3 for Figure 2 A sectional view;

[0018] In the diagram: 10, support component; 101, liquid outlet channel; 102, liquid outlet; 11, micropump body; 111, pump diaphragm; 20, piezoelectric element; 30, connector; 40, fastener; 50, adhesive. Detailed Implementation

[0019] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0020] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] This embodiment provides a piezoelectric micropump structure. By adjusting the relative position of the connector 30 and the pump diaphragm 111, the pump diaphragm 111 is pressed down from a horizontal position, forming a concave structure on the surface of the pump diaphragm 111. Thus, when the same voltage is applied, the vertical stroke of the pump diaphragm 111 meets the usage requirements. That is, under the premise that the pump body and the pump diaphragm 111 move up and down to achieve the same stroke, the applied voltage can be further reduced, thereby reducing power consumption.

[0022] Combination Figure 2 and Figure 3 As shown, the piezoelectric micropump structure of this embodiment includes a support member 10 and a piezoelectric element 20. A micropump body 11 is mounted on the support member 10, and a pump membrane 111 is disposed on the micropump body 11. In this embodiment, the piezoelectric element 20 is a piezoelectric ceramic. The piezoelectric element 20 can press down on the pump membrane 111, so that the initial position of the pump membrane 111 is adjusted to a 25% downward pressure, so that the upper and lower strokes of the pump membrane 111 meet the usage requirements and reduce power consumption.

[0023] In this embodiment, one end of the piezoelectric element 20 is fixed to the support member 10, and the other end is connected to the pump diaphragm 111 through the connector 30. The pump diaphragm 111 is provided with adhesive 50. The connector 30 is connected to the pump diaphragm 111 through the adhesive 50 to press down the pump diaphragm 111 and form a concave structure on the surface of the pump diaphragm 111. In this embodiment, the connector 30 is an L-shaped pressing piece. One end of the connector 30 is bonded to the pump diaphragm 111 through the adhesive 50, so that the connector 30 is set at an angle to complete the pressing process of the pump diaphragm 111.

[0024] Furthermore, one end of the piezoelectric element 20 is connected to the support member 10 via a fastener 40 to fix one end of the piezoelectric element 20. In this embodiment, the fastener 40 is a fastening block, and a bolt is used to cooperate with the fastener 40 to fix the piezoelectric element 20 to the support member 10. Its installation is stable and can effectively prevent the position of the end of the piezoelectric element 20 from shifting, ensuring that the other end of the piezoelectric element 20 can smoothly press down on the pump membrane 111 to form a concave structure on the surface of the pump membrane 111.

[0025] In this embodiment, the support member 10 is a support base. The support member 10 is provided with a liquid outlet channel 101 and a liquid outlet 102. The liquid outlet channel 101 is connected to the micropump body 11 so that the liquid can be discharged through the liquid outlet 102. When the micropump body is working, the liquid is pressurized by the pump membrane 111 and discharged through the liquid outlet channel 101 and the liquid outlet 102.

[0026] In practical use, the piezoelectric micropump structure of this embodiment adjusts the relative position of the connector 30 and the pump diaphragm 111. With the cooperation of the connector 30 and the adhesive 50, the pump diaphragm 111 is pressed down from the horizontal position, forming a concave structure on the surface of the pump diaphragm 111. Thus, when the same voltage is applied, the vertical stroke of the pump diaphragm 111 meets the usage requirements. That is, under the premise that the pump body and the pump diaphragm 111 move up and down to achieve the same stroke, the applied voltage can be further reduced, thereby reducing power consumption.

[0027] While the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the present invention. That is, the methods, systems, or devices discussed above are merely examples. Various configurations can be appropriately omitted, substituted, or added to various processes or components. For example, in alternative configurations, methods can be performed in a different order than described, and / or various stages can be added, omitted, and / or combined. Moreover, features described with respect to certain configurations can be combined in various other configurations. Different aspects and elements of the configuration can be combined in a similar manner. Furthermore, as technology develops, many elements are merely examples and do not limit the scope of this disclosure or the claims.

[0028] Specific details are provided in the specification to offer a thorough understanding of exemplary configurations, including implementations. However, configurations can be practiced without these specific details; for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail to avoid obscuring the configuration. This description provides only exemplary configurations and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes can be made to the function and arrangement of the elements without departing from the spirit or scope of this disclosure.

[0029] Furthermore, although each operation can be described as a sequential process, many operations can be executed in parallel or simultaneously. Additionally, the order of operations can be rearranged. A process may have additional steps. Moreover, examples of methods can be implemented using hardware, software, firmware, middleware, code, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware, or code, the program code or code segments used to perform the necessary tasks can be stored in a non-transitory computer-readable medium such as a storage medium and executed by a processor.

[0030] In summary, the above detailed description is intended to be exemplary rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to define the spirit and scope of this invention. These embodiments should be understood as illustrative only and not as limiting the scope of protection of this invention. After reading the description of this invention, those skilled in the art can make various alterations or modifications to it, and these equivalent changes and modifications also fall within the scope defined by the claims of this invention.

Claims

1. A piezoelectric micropump structure, characterized by comprising: Comprising A support (10) is provided with a micro-pump body (11), and a pump membrane (111) is arranged on the micro-pump body (11); A piezoelectric element (20) is fixed on one end of the support (10), and the other end is connected with the pump membrane (111) through a connecting piece (30) to press down the pump membrane (111) and form a concave structure on the surface of the pump membrane (111).

2. The piezoelectric micropump structure according to claim 1, wherein The support (10) is a support seat, and a liquid outlet flow channel (101) and a liquid outlet (102) are arranged in the support (10), the liquid outlet flow channel (101) is communicated with the micro-pump body (11) to guide the liquid out through the liquid outlet (102).

3. The piezoelectric micropump structure according to claim 1, wherein One end of the piezoelectric element (20) is connected with the support (10) through a fastener (40) to fix one end of the piezoelectric element (20).

4. The piezoelectric micropump structure according to claim 1 or 3, characterized in that The piezoelectric element (20) is a piezoelectric ceramic.

5. The piezoelectric micropump structure according to claim 1, wherein Glue (50) is arranged on the pump membrane (111), and the connecting piece (30) is connected with the pump membrane (111) through the glue (50) to press down the pump membrane (111).

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