Filtering air channel assembly of piezoelectric pump

Abstract

The utility model provides a filtering air channel assembly of a piezoelectric pump. The filtering air channel assembly comprises a double-cavity piezoelectric pump body and a filter which are connected with each other. An upper air channel group and a lower air channel group are arranged on the double-cavity piezoelectric pump body, and each air channel group comprises an air outlet pipe and an air inlet pipe which are arranged left and right; a filter screen is fixedly connected outside a cavity opening of the air inlet cavity, the filter is provided with an exhaust pipe at the position of the air outlet pipe, and the filter sleeves a pipe opening of the air channel group; when the filter is provided with a parallel channel, the parallel channel is respectively communicated with the air outlet pipes of the upper and lower air channel groups, the parallel channel is communicated with the exhaust pipe, and the air inlet pipes of the upper and lower air channel groups are communicated with the air inlet cavity; when the filter is provided with a series channel, the air inlet pipe of one air channel group is communicated with the series channel and the air outlet pipe is communicated with the exhaust pipe, and the air outlet pipe of the other air channel group is communicated with the series channel and the air inlet pipe is communicated with the air inlet cavity. The utility model has the advantages of compact integral structure, small occupied space, simplicity in assembly, high reliability, low use cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of piezoelectric pumps, in particular to a filtering airway component of a piezoelectric pump. Background Art

[0002] The piezoelectric micro air pump uses piezoelectric ceramics as the driving element, which can operate at a high frequency of more than 20Khz, which is beyond the hearing range of the human ear. It can provide an ultra-quiet working state and can solve many usage scenarios that require silent air pumps. Due to the small size of the piezoelectric pump and the small pores of the internal valve, the piezoelectric pump has a relatively high requirement for the cleanliness of the gas entering the pump body, and a filter is required to intercept dust and particulate matter in the gas.

[0003] Piezoelectric pumps generally have an air inlet and an exhaust duct. Some new piezoelectric pumps may have more air inlets and exhaust ducts. Therefore, a filter unit needs to be set at the front end of the air inlet duct to allow the piezoelectric pump to work in a clean air state. For example, a dual-chamber piezoelectric pump has two sets of air inlets and exhaust ducts. This requires the connection of external pipes on the air duct to allow the air inlet and outlet to pass through different pipes to provide the required airflow and pressure. However, the external pipe method makes the assembly complicated, the equipment occupies a large space, and the number of joints is large, which reduces the reliability of the equipment and the cost of use is also high. Therefore, we propose a filter air duct assembly for a piezoelectric pump to solve the above problems existing in the prior art. Utility Model Content

[0004] The utility model aims to provide a filter airway component of a piezoelectric pump to solve some problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a filtering airway component of a piezoelectric pump, comprising a double-cavity piezoelectric pump body and a filter connected to each other; the double-cavity piezoelectric pump body is provided with two groups of airway groups, each of which includes an air outlet pipe and an air inlet pipe arranged on the left and right; the filter is provided with an air inlet cavity at the position of the air inlet pipe, and the air inlet cavity is fixedly connected to the filter net outside the cavity, the filter is provided with an exhaust pipe at the position of the air outlet pipe, and the filter is sleeved and installed on the pipe mouth of the airway group; the filter is provided with parallel channels or series channels, when the filter is provided with parallel channels, the parallel channels are respectively connected with the air outlet pipes of the upper and lower airway groups, and the parallel channels are connected with the exhaust pipe, and the air inlet pipes of the upper and lower airway groups are connected with the air inlet cavity; when the filter is provided with a series channel, the air inlet pipe of one airway group is connected with the series channel, and the air outlet pipe is connected with the exhaust pipe, and the air outlet pipe of the other airway group is connected with the series channel, and the air inlet pipe is connected with the air inlet cavity.

[0006] Furthermore, a plurality of sleeve pipes are provided on the connection side between the filter and the airway group, and the plurality of sleeve pipes are sleeved one by one with the air outlet pipes and the air inlet pipes of the upper and lower airway groups.

[0007] Furthermore, the height of the filter does not exceed the height of the dual-chamber piezoelectric pump body.

[0008] Furthermore, the main body of the filter is an elastic structure.

[0009] Furthermore, the filter mesh number of the filter is above 300 meshes.

[0010] Furthermore, the filter screen is fixed to the outside of the cavity opening of the air inlet cavity by means of double-sided adhesive.

[0011] Furthermore, the parallel channels or the series channels are respectively provided with openings communicating with the outside, and sealing plugs are installed on the openings.

[0012] After adopting the above technical scheme, compared with the existing technology, it has the following beneficial effects: the overall structure is compact, occupies a small space, and has the advantages of simple assembly, high reliability, and low cost of use, and has great promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0016] Figure 3 It is a schematic diagram of gas flow direction when the double-chamber piezoelectric pump body 1 and the filter 2 are connected to form a parallel connection method in the utility model;

[0017] Figure 4 It is a cross-sectional view of the connection between the double-chamber piezoelectric pump body 1 and the filter 2 with a parallel channel 24 provided inside in the utility model;

[0018] Figure 5 This is a structural cross-sectional view of the utility model when a parallel channel 24 is provided inside the filter 2;

[0019] Figure 6It is a schematic diagram of gas flow direction when the double-chamber piezoelectric pump body 1 and the filter 2 are connected in series in the utility model;

[0020] Figure 7 It is a structural cross-sectional view of the utility model when a series channel 25 is provided inside the filter 2 .

[0021] Explanation of the reference numerals: 1. dual-chamber piezoelectric pump body; 11. outlet pipe; 12. inlet pipe; 2. filter; 21. inlet chamber; 211. filter screen; 22. exhaust pipe; 23. sleeve pipe; 24. parallel channel; 25. series channel; 3. sealing plug. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] In view of the problems existing in the prior art, the utility model provides a filter airway component of a piezoelectric pump. The utility model is described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] See also Figure 1-Figure 5 As shown, the technical solution adopted in this specific embodiment is: a filtering airway component of a piezoelectric pump, including a dual-chamber piezoelectric pump body 1 and a filter 2 connected to each other, wherein the height of the filter 2 does not exceed the height of the dual-chamber piezoelectric pump body 1, thereby better connecting with the dual-chamber piezoelectric pump body 1 to form a smaller whole.

[0026] The dual-chamber piezoelectric pump body 1 is provided with two groups of airway groups, one above the other, each group of airway groups includes an air outlet pipe 11 and an air inlet pipe 12 arranged on the left and right, that is, four air pipes are arranged in a matrix, and the filter 2 is provided with an air inlet cavity 21 at the position of the air inlet pipe 12, and a filter screen 211 with a filter mesh of more than 300 meshes is fixedly connected to the outside of the cavity opening of the air inlet cavity 21, which can ensure that the piezoelectric pump works in a relatively clean gas environment, and the filter screen 211 can be fixed to the outer wall of the cavity opening of the air inlet cavity 21 by double-sided adhesive. In addition, the filter screen 211 can also be connected to the main body of the filter 211 by screws or snap-on fixing. At this time, a sealing structure is provided at the connection position between the filter screen 211 and the air inlet cavity 211 to prevent unfiltered gas from entering the air inlet cavity 211 from the connection gap position.

[0027] It should be specifically explained that the filter 2 is also provided with an exhaust pipe 22 at the position of the exhaust pipe 11 .

[0028] The filter 2 is sleeved and installed on the pipe opening of the airway group. Specifically, a plurality of sleeve pipes 23 are arranged on the connection side between the filter 2 and the airway group, and the number of the sleeve pipes 23 is the sum of the number of the outlet pipes 11 and the inlet pipes 12 of the two airway groups. The plurality of sleeve pipes 23 are sleeved and arranged one by one with the outlet pipes 11 and the inlet pipes 12 of the upper and lower airway groups.

[0029] Furthermore, the main body of the filter 2 should be an elastic structure, preferably made of TPU material, with a certain elasticity, and can form a self-sealing when connected with the airway group. In particular, the sleeve 23, as an important connection part with the airway group, has elasticity to better achieve a sealed connection with the outlet pipe 11 or the inlet pipe 12.

[0030] A parallel channel 24 is opened inside the filter 2, and the parallel channel 24 is connected to the outlet pipes 11 of the upper and lower airway groups respectively, and the parallel channel 24 is connected to the exhaust pipe 22. At this time, the inlet pipes 12 of the upper and lower airway groups are connected to the inlet cavity 21, thereby forming a parallel connection method of the airways, and finally the two outlet pipes 11 of the dual-chamber piezoelectric pump body 1 are connected to the same exhaust pipe 22 for exhaust. In this way, the outlet flow of the piezoelectric pump body 1 is increased compared with the single-chamber airway flow, and a larger single-tube airway flow can be output.

[0031] Example 2

[0032] See also Figure 1-Figure 2 , Figure 6-Figure 7 As shown, the difference between this embodiment and embodiment 1 is that a series channel 25 is opened inside the filter 2, at this time, the air inlet pipe 12 of one of the airway groups is connected to the series channel 25, and the air outlet pipe 11 is connected to the exhaust pipe 22, and the air outlet pipe 11 of the other airway group is connected to the series channel 25, and the air inlet pipe 12 is connected to the air inlet cavity 21. In this way, the air outlet flow of one of the cavities of the dual-cavity piezoelectric pump body 1 does not change much, and the pressure of the single air outlet is significantly enhanced. The fundamental reason is that each cavity of the dual-cavity piezoelectric pump has a one-way valve that can withstand pressure and can output a certain flow and pressure. The airflow of the front air outlet input into the air inlet of the other cavity can have a superimposed effect in pressure, thereby forming a series connection method of the airway.

[0033] It should be specifically explained that the parallel channel 24 or the series channel 25 is respectively provided with an opening communicating with the outside, and a sealing plug 3 is installed at the opening position. Such a design can make the filter easier to mold and realize the above-mentioned airway function.

[0034] In the description of the present invention, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A filter airway assembly for a piezoelectric pump, characterized in that: It comprises a double-chamber piezoelectric pump body and a filter connected to each other; the double-chamber piezoelectric pump body is provided with two groups of upper and lower airway groups, each group of airway groups comprises an air outlet pipe and an air inlet pipe arranged on the left and right; the filter is provided with an air inlet cavity at the air inlet pipe position, the air inlet cavity is fixedly connected to a filter net at the cavity opening, the filter is provided with an exhaust pipe at the air outlet pipe position, and the filter is sleeved and installed on the pipe opening of the airway group; The filter is provided with parallel channels or series channels. When the filter is provided with parallel channels, the parallel channels are respectively connected to the outlet pipes of the upper and lower airway groups, and the parallel channels are connected to the exhaust pipe, and the inlet pipes of the upper and lower airway groups are connected to the air inlet cavity; when the filter is provided with series channels, the inlet pipe of one of the airway groups is connected to the series channel, and the outlet pipe is connected to the exhaust pipe, and the outlet pipe of the other airway group is connected to the series channel, and the inlet pipe is connected to the air inlet cavity.

2. The filter airway assembly of the piezoelectric pump according to claim 1, characterized in that: A plurality of sleeve pipes are arranged on the connection side between the filter and the airway group, and the plurality of sleeve pipes are sleeved one by one with the air outlet pipes and the air inlet pipes of the upper and lower airway groups.

3. The filter airway assembly of the piezoelectric pump according to claim 1, characterized in that: The height of the filter does not exceed the height of the dual-chamber piezoelectric pump body.

4. The filter airway assembly of the piezoelectric pump according to claim 1, characterized in that: The main body of the filter is an elastic structure.

5. The filter airway assembly of the piezoelectric pump according to claim 1, characterized in that: The filtering mesh number of the filter is above 300 meshes.

6. The filter airway assembly of a piezoelectric pump according to any one of claims 1 or 5, characterized in that: The filter screen is fixed to the outside of the cavity opening of the air inlet cavity by means of double-sided adhesive.

7. The filter airway assembly of the piezoelectric pump according to claim 1, characterized in that: The parallel channels or the series channels are respectively provided with openings communicating with the outside, and sealing plugs are installed on the openings.

Images