一种隔膜泵及药液供应组件

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By setting a limiting protrusion and an air groove structure on the inner wall of the second recess of the diaphragm pump, the problem of gas diffusion in the diaphragm pump working chamber is solved, and the high efficiency response and liquid delivery accuracy of the diaphragm pump are achieved.

CN224515348UActive Publication Date: 2026-07-17HANGZHOU COBETTER SEMICONDUCTOR SEPARATION MEMBRANE CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: HANGZHOU COBETTER SEMICONDUCTOR SEPARATION MEMBRANE CO LTD
Filing Date: 2025-09-09
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

Existing diaphragm pumps face significant challenges in diffusion within the working chamber and in propelling the diaphragm towards the pump chamber, resulting in low glue dispensing efficiency and easy diaphragm damage.

Method used

A limiting protrusion is set on the inner wall of the second recess of the diaphragm pump to form a physical barrier or support point, which increases the contact area between the working gas and the diaphragm, improves the gas exchange efficiency, and optimizes the deformation path of the diaphragm through the limiting protrusion and the gas groove structure, ensuring uniform gas flow and flat fit of the diaphragm.

Benefits of technology

It improves the response speed and real-time performance of diaphragm pumps, reduces the risk of diaphragm fatigue damage, and ensures the accuracy of liquid intake and discharge.

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Abstract

本实用新型公开一种隔膜泵及药液供应组件，包括具有第一凹部的第一壳体、具有第二凹部的第二壳体以及夹持密封在第一壳体和第二壳体之间的隔膜，第二壳体内部具有进出气通道，进出气通道具有与工作室连通的气口，第二凹部的内壁上设有位于气口径向一侧的限位凸起，限位凸起由第二凹部的内壁朝向隔膜突出。限位凸起在气口周围形成了一个物理屏障或支撑点；在隔膜受负压作用朝向第二凹部运动时，限位凸起使得隔膜与限位凸起附近的第二凹部内壁之间始终存在间隙，少量工作气体进入隔膜与第二凹部之后能够快速进入间隙，增加工作气体对隔膜的作用面积，稍微加压或不加压使得工作气体就能将隔膜容易撑开，提高隔膜泵的响应速度。

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Claims

1. A diaphragm pump, comprising a first housing (10) having a first recess (11), a second housing (20) having a second recess (21), and a diaphragm (30) clamped and sealed between the first housing (10) and the second housing (20), the diaphragm (30) and the first recess (11) forming a pump chamber (12) for liquid intake and discharge, the diaphragm (30) and the second recess (21) forming a working chamber (22) for working gas intake and discharge, the diaphragm (30) deforming toward the first recess (11) or the second recess (21) under the action of the working gas to change the volume of the pump chamber (12) to discharge or intake liquid; characterized in that, The second housing (20) has an air inlet / outlet channel (25) inside, the air inlet / outlet channel (25) has an air port (251) communicating with the working chamber (22), and the inner wall of the second recess (21) is provided with a limiting protrusion (23) located on the radial side of the air port (251), the limiting protrusion (23) protruding from the inner wall of the second recess (21) toward the diaphragm (30).

2. The membrane pump of claim 1, wherein, The air inlet / outlet channel (25) includes an air groove (252) extending from the inner wall of the second recess (21) away from the diaphragm (30) and a gas flow channel (253) communicating with the air groove (252). The opening of the air groove (252) facing the diaphragm (30) constitutes the air port (251). The limiting protrusion (23) is radially spaced outside the air port (251). When the diaphragm (30) abuts against the limiting protrusion (23), an inner gap space (31) is formed between the limiting protrusion (23) and the air groove (252) by the inner wall of the second recess (21).

3. The membrane pump of claim 1, wherein, The inner wall of the second recess (21) includes a circular planar portion (211) located in the middle region and an annular inclined portion (212) located on the outer periphery of the planar portion (211), and the air vent (251) is located in the planar portion (211); The inclined portion (212) extends obliquely from the inside out toward the diaphragm (30), and the limiting protrusion (23) is partly located on the flat portion (211) and partly located on the inclined portion (212).

4. The membrane pump of claim 3, wherein, The limiting protrusion (23) is a dot-shaped or block-shaped object that does not surround the circumference of the planar portion (211).

5. The membrane pump of claim 3, wherein, The limiting protrusion (23) includes an arc-shaped surface (234) near the air port (251). The arc-shaped surface (234) is inclined and includes a first arc-shaped edge (235) and a second arc-shaped edge (236). The first arc-shaped edge (235) is located on the flat portion (211). Both ends of the first arc-shaped edge (235) extend toward the inclined portion (212). The second arc-shaped edge (236) is closer to the diaphragm (30) than the first arc-shaped edge (235).

6. The membrane pump of claim 5, wherein, The limiting protrusion (23) also includes a support plane (231) facing the diaphragm (30). The end of the support plane (231) near the air port (251) is connected to the second arc-shaped edge (236), and the end away from the air port (251) is connected to the inclined surface (212). When the diaphragm (30) deforms and abuts against the support plane (231), the inner wall of the diaphragm (30) and the second recess (21) forms an outer gap space (32) between the support plane (231) and the inclined surface (212).

7. The membrane pump of claim 6, wherein, The limiting protrusion (23) also includes inclined surfaces (237) located on both sides of the support plane (231), the inclined surfaces (237) connecting the arc-shaped surface (234) and the inner wall of the second recess (21).

8. The membrane pump of claim 2, wherein, The second recess (21) has a receiving groove (24) at its center, and the air groove (252) is formed on the inner wall of the receiving groove (24). The limiting protrusion (23) is spaced above the air groove (252). The receiving groove (24) is provided with an anti-wear sleeve (26) with an interference fit. The anti-wear sleeve (26) abuts against the inner edge of the air groove (252) on the inner wall of the receiving groove (24) so that gas can enter and exit through the air port (251).

9. The membrane pump of claim 8, wherein, The wear-resistant sleeve (26) is slidably connected to a sliding sleeve (27), and a permanent magnet (28) is fixedly installed inside the sliding sleeve (27). The diaphragm (30) has a connecting part (33) protruding from its surface facing the second recess (21). The sliding sleeve (27) is fixedly connected to the connecting part (33). A magnetic sensor for detecting the position of the permanent magnet (28) is provided outside the second housing (20).

10. A liquid medicine supply assembly, characterized in that, The pump includes a diaphragm pump as described in any one of claims 1 to 9, and further includes a reservoir (40) that is in on / off communication with the pump chamber (12) of the diaphragm pump.