Diaphragm pump with drip-proof one-way valve device

By setting up a one-way check valve device and a return device at the outlet of the diaphragm pump, the fluid dripping problem of the diaphragm pump when it is stopped is solved, the formation of stagnant water is avoided, the user experience is improved, and the fluid reflow is realized.

CN222558716UActive Publication Date: 2025-03-04XIAMEN CONJOIN ELECTRONICS TECH
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Patent Information

Application Number
CN202420400791.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-04
Publication Date
2025-03-04
Estimated Expiration
2034-03-04

AI Technical Summary

Technical Problem

Existing diaphragm pumps are prone to fluid dripping problems when they stop operating, and anti-drip technology usually seals fluid, resulting in stagnant water and affects the user experience.

Method used

A diaphragm pump with an anti-drip check valve device is designed. By setting a one-way check valve device and a return device at the outlet of the pump, the fluid is reflowed and sealed when the pump stops running, and avoiding drip and stagnation water formation.

Benefits of technology

It effectively prevents fluid dripping when the diaphragm pump is stopped, avoids the formation of stagnant water, improves the user experience, and realizes the return of fluid, keeps the pump clean.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a diaphragm pump with an anti-leakage one-way valve device, which is used for fluid transmission diaphragm pumps (10) for daily small household appliances and the like, is provided with a one-way valve device (20) for preventing fluid leakage, and is characterized by further comprising the one-way valve device (20) arranged between an outlet cover plate of the diaphragm pump and a diaphragm valve component. The one-way valve device (20) comprises an elastic piece (21), a valve membrane (22) and a valve seat (23); the elastic piece (21) abuts against the inlet and outlet cover plate (11) to be installed, a boss (231) with a center circulation opening (232) is arranged on the valve seat (23), the valve membrane (22) is fixed to the boss (231), and a valve membrane piece (221) is arranged in the center of the valve membrane (22) and matched with the center circulation opening (232). According to the diaphragm pump, the non-return one-way valve is arranged at the outlet of the diaphragm pump, and meanwhile, the backflow device is arranged, so that the problem that residual fluid leaks when the diaphragm pump stops running is solved, and meanwhile, the beneficial effect that the fluid flows back to the diaphragm pump is achieved.
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Description

Technical Field

[0001] The utility model relates to a micro pump device, in particular to a diaphragm pump with a one-way check valve anti-drip device, in particular to a diaphragm pump with an anti-drip one-way valve device. Background Art

[0002] Diaphragm water pumps are widely used as fluid transmission tools in daily small household appliances, such as coffee machines, sweepers, and sweeping robots to achieve fluid transmission. Their small size and powerful functions are the popular trend to achieve high product quality requirements and user experience. Preventing the dripping of residual water when the diaphragm water pump stops working is a problem that needs to be solved urgently. Currently, there are many anti-drip technologies on the market that add a check valve to the fluid outlet. However, although the problem of residual fluid dripping is solved, the fluid is also sealed at the outlet, forming dead water.

[0003] In view of the above problems, the present invention adopts the following technical solutions to improve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a diaphragm pump with an anti-drip one-way valve device, and the disclosed technical solution is as follows:

[0005] A diaphragm pump with a drip-proof one-way valve device is used for a fluid transmission diaphragm pump (10) for daily small household appliances, etc. The one-way valve device (20) is provided to prevent fluid dripping. The micro-sized diaphragm pump comprises a driving device (14), a diaphragm device (13), a membrane valve assembly (12) and an inlet and outlet cover plate (11). The driving device (14) is composed of a motor (141) and an eccentric rotating structure (142). The diaphragm device (13) comprises a diaphragm bag (131) and a diaphragm bracket (132) for pumping fluid. The membrane valve assembly (12) comprises a valve fixing seat (121) for setting a fluid in and out of a diaphragm bag through hole, and an inlet valve plate (122) provided on the valve fixing seat for matching the diaphragm bag (131) with a fluid. 22) and an outlet valve sheet (123), and an inlet and outlet cover plate (11) provided with a fluid inlet nozzle (15) and a fluid outlet nozzle (16), characterized in that it also includes a one-way valve device (20) provided between the outlet cover plate of the diaphragm pump and the membrane valve assembly, the one-way valve device (20) comprising an elastic member (21), a valve membrane (22) and a valve seat (23); the elastic member (21) is installed against the inlet and outlet cover plate (11), a boss (231) with a central flow opening (232) is provided on the valve seat (23), the valve membrane (22) is fixed on the boss (231), and a valve membrane (221) is provided at the center of the valve membrane (22) to fit the central flow opening (232). A one-way check valve device is provided at the outlet of the diaphragm pump to close the outlet when the diaphragm pump stops running and the pressure in the outlet channel is reduced, thereby preventing the fluid in the outlet cavity from dripping from the outlet fluid nozzle and affecting the user experience. In the setting of the one-way valve, the valve membrane (22) is fixedly connected to the valve seat boss (231), and a valve diaphragm (221) is arranged in the center of the valve membrane (22) to realize a one-way opening and closing switch structure. At the same time, the switch valve structure is arranged in the center of the pump, which can better ensure the overall smooth operation of the diaphragm pump.

[0006] Furthermore, the boss (231) further includes a radially arranged drainage channel (233), wherein the first port (2331) of the drainage channel (233) is connected to the central flow port (232) of the pump body, and the second port (2332) is connected to the inlet (161) of the fluid outlet nozzle (16), so as to guide the fluid from the central channel to the pump arranged along the periphery of the diaphragm pump housing. The arrangement of the drainage channel (233) enables the fluid outlet nozzle to be arranged at the edge of the diaphragm pump housing, staggered with the one-way valve arranged in the center, which not only makes it easier to install the elastic member of the one-way valve, but also achieves a more stable opening and sealing due to the different pressure directions of the one-way valve sheet.

[0007] Furthermore, the fluid outlet nozzle (16) is arranged at the edge of the outlet cover plate (11) through the communication function of the drainage channel (233), and is symmetrically arranged with the fluid inlet nozzle (15). The fluid outlet nozzle (16) and the fluid inlet nozzle (15) are symmetrically arranged at the edge of the entire diaphragm pump, so that the installation is stable during use.

[0008] Furthermore, it also includes an inlet channel (30) connected to the fluid inlet nozzle (15), the inlet channel (30) including a first inlet (31) provided on the valve membrane (22), and a second inlet (32) provided on the boss (231) corresponding to the first inlet (31). Correspondingly, a channel corresponding to the fluid inlet nozzle (15) is also provided on the boss and the valve membrane, and is connected to the diaphragm bag of the diaphragm pump.

[0009] Furthermore, the invention also comprises a reflux device (40), wherein the reflux device (40) comprises a first reflux port (41) arranged on the valve membrane (22), and a second reflux port (42) arranged on the boss (231) corresponding to the first inlet (31). A dead water discharge structure is also arranged on the one-way valve device to return the fluid in the cavity sealed by the one-way valve device to the diaphragm bag, so that when the diaphragm pump is not working, the dead water intercepted and sealed by the anti-drip valve will not be stored in the cavity of the diaphragm pump, thereby polluting the diaphragm pump space.

[0010] Furthermore, the first reflux port (41) of the reflux device (40), the first inlet (31) of the inlet channel (30), and the second port (2332) of the central flow port (232) are arranged in a triangle along the outer portion of the diaphragm pump housing. The triangles are arranged in a stable manner to reduce the vibration of the diaphragm pump fluid flow.

[0011] Furthermore, the diameters C of the first reflux port (41) and the second reflux port (42) of the reflux device (40) are smaller than the channel diameter D of the inlet channel (30).

[0012] Furthermore, the reflux device (40) is directly connected to one of the diaphragm bags (131).

[0013] Furthermore, the inlet and outlet cover plate (11) is provided with a one-way valve cavity (111) conforming to the boss (231), and the one-way valve cavity (111) protrudes from the outer surface of the inlet and outlet cover plate (11).

[0014] Furthermore, an elastic member installation groove (112) is provided at the center of the one-way valve cavity (111), and the elastic member installation groove (112) protrudes from the outer surface of the one-way valve cavity (111).

[0015] According to the above technical scheme, the utility model has the following beneficial effects: the utility model is a diaphragm pump with an anti-drip one-way valve device. While a non-return one-way valve is provided at the outlet of the diaphragm pump, a reflux device is also provided, which solves the problem of residual fluid dripping when the diaphragm pump stops operating, and at the same time achieves the beneficial effect of fluid reflux to the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of the overall structure of a diaphragm pump according to the best embodiment of the utility model;

[0017] Figure 2 It is an exploded top view schematic diagram of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the diaphragm pump anti-drip device according to the best embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the diaphragm pump anti-drip device according to the best embodiment of the utility model;

[0020] Figure 5 A front view schematic diagram of the overall structure of a diaphragm pump in a preferred embodiment of the utility model;

[0021] Figure 6 It is a schematic cross-sectional view of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0022] Figure 7 Another side elevational view of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0023] Figure 8 BB is a cross-sectional schematic diagram of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0024] Fig. 9 This is a schematic diagram of the check valve seat structure of a diaphragm pump in the best embodiment of the utility model;

[0025] Fig.10 This is a schematic diagram of the check valve seat structure of a diaphragm pump in the best embodiment of the utility model;

[0026] Fig.11 This is a schematic diagram of the check valve seat structure of a diaphragm pump in the best embodiment of the utility model;

[0027] Fig.12 This is a schematic diagram of the diaphragm pump check valve membrane structure of the best embodiment of the utility model;

[0028] Fig.13 This is a schematic diagram of the diaphragm pump check valve membrane structure of the best embodiment of the utility model;

[0029] Fig.14 This is a schematic diagram of the inlet and outlet cover structure of the diaphragm pump in the best embodiment of the utility model;

[0030] Fig.15 This is a schematic diagram of the inlet and outlet cover structure of the diaphragm pump in the best embodiment of the utility model;

[0031] Fig.16 This is a schematic diagram of the inlet and outlet cover structure of the diaphragm pump according to the best embodiment of the utility model. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figures 1 to 12 A diaphragm pump with an anti-drip one-way valve device is shown, a diaphragm pump with an anti-drip one-way valve device, a diaphragm pump for daily small household appliances and other fluid transmission diaphragm pump 10, a one-way valve device 20 is provided to prevent fluid dripping, the micro diaphragm pump includes a drive device 14, a diaphragm device 13, a membrane valve assembly 12 and an inlet and outlet cover plate 11, the drive device 14 is composed of a motor 141 and an eccentric rotating structure 142, the diaphragm device 13 includes a diaphragm bag 131 for pumping fluid and a diaphragm bracket 132, the membrane valve assembly 12 includes a valve fixing seat 121 for setting fluid in and out of the diaphragm bag through hole, and a valve fixing The seat is provided with an inlet valve plate 122 and an outlet valve plate 123 for matching the fluid of the diaphragm bag 131, and an inlet and outlet cover plate 11 provided with a fluid inlet nozzle 15 and a fluid outlet nozzle 16. The seat is characterized in that it also includes a one-way valve device 20 arranged between the outlet cover plate of the diaphragm pump and the membrane valve assembly, and the one-way valve device 20 includes an elastic member 21, a valve membrane 22 and a valve seat 23; the elastic member 21 is installed against the inlet and outlet cover plates 11, and a boss 231 with a central flow port 232 is arranged on the valve seat 23, the valve membrane 22 is fixed on the boss 231, and a valve membrane 221 is arranged in the center of the valve membrane 22 to adapt to the central flow port 232.

[0033] like Figure 2 and 3 As shown, a one-way check valve device 20 is provided at the fluid outlet of the diaphragm pump, so that when the diaphragm pump stops running and the pressure in the outlet channel decreases, the elastic force of the elastic member of the one-way check valve device closes the outlet, preventing the fluid in the outlet cavity from dripping from the fluid outlet nozzle, thereby affecting the user experience. In the setting of the one-way valve, the valve membrane 22 is fixedly connected to the valve seat boss 231, and a valve membrane 221 is provided at the center of the valve membrane 22 to realize a one-way opening and closing switch structure. At the same time, the switch valve structure is provided at the center of the pump, which can better ensure the overall smooth operation of the diaphragm pump.

[0034] like Fig. 9 and Fig.15 As shown in , the boss 231 also includes a radially arranged drainage channel 233, the first port 2331 of the drainage channel 233 is connected to the central flow port 232 of the pump body, and the second port 2332 is connected to the inlet 161 of the fluid outlet nozzle 16, and the fluid is guided from the central channel to the pump along the periphery of the diaphragm pump housing. The arrangement of the drainage channel 233 allows the fluid outlet nozzle to be arranged at the edge of the diaphragm pump housing, staggered with the one-way valve arranged in the center, which not only makes it easier to install the elastic member of the one-way valve, but also achieves a more stable opening and sealing due to the different pressure directions of the one-way valve sheet.

[0035] like Figure 3 As shown, the fluid outlet nozzle 16 is arranged at the edge of the outlet cover plate 11 through the communication function of the drainage channel 233, and is symmetrically arranged with the fluid inlet nozzle 15. The fluid outlet nozzle 16 and the fluid inlet nozzle 15 are symmetrically arranged at the edge of the diaphragm pump as a whole, so as to achieve stable installation during use.

[0036] like Figure 3 and Figure 6 As shown, the inlet channel 30 connected to the fluid inlet nozzle 15 includes a first inlet 31 provided on the valve membrane 22, and a second inlet 32 ​​provided on the boss 231 corresponding to the first inlet 31. Correspondingly, the channel corresponding to the fluid inlet nozzle 15 is also provided on the boss and the valve membrane, and is connected to the diaphragm bag of the diaphragm pump.

[0037] like Figure 3 and Figure 8 As shown in the figure, the diaphragm pump is also provided with a reflux device 40, which includes a first reflux port 41 provided on the valve membrane 22, and a second reflux port 42 provided on the boss 231 corresponding to the first inlet 31. A dead water discharge structure is also provided on the one-way valve device to return the fluid in the cavity sealed by the one-way valve device to the diaphragm bag, so that when the diaphragm pump is not working, the dead water intercepted and sealed by the anti-drip valve will not be stored in the cavity of the diaphragm pump, thereby polluting the diaphragm pump space.

[0038] like Fig. 9 and Fig.10 As shown, the first reflux port 41 of the reflux device 40 , the first inlet 31 of the inlet channel 30 , and the second port 2332 of the central flow port 232 form a triangle and are arranged along the outer periphery of the diaphragm pump housing.

[0039] like Figure 8 As shown, the diameters C of the first reflux port 41 and the second reflux port 42 of the reflux device 40 are smaller than the diameter D of the inlet channel 30 . The reflux device 40 is directly connected to one of the diaphragm bags 131 .

[0040] like Fig.16 As shown in , the inlet and outlet cover plate 11 is provided with a one-way valve cavity 111 which is conformed to the boss 231 , and the one-way valve cavity 111 protrudes from the outer surface of the inlet and outlet cover plate 11 .

[0041] like Figure 8 and Figures 14 to 16 As shown, an elastic member installation groove 112 is provided at the center of the one-way valve cavity 111 , and the elastic member installation groove 112 protrudes from the outer surface of the one-way valve cavity 111 .

[0042] The above is one embodiment of the present utility model. In addition, it should be noted that any equivalent or simple changes made based on the structure, features and principles described in the concept of this patent are included in the protection scope of this patent.

Claims

1. A diaphragm pump with an anti-drip one-way valve device, comprising a drive device (14), a diaphragm device (13), a membrane valve assembly (12) and an inlet and outlet cover plate (11), wherein the drive device (14) is composed of a motor and an eccentric rotating structure, the diaphragm device (13) comprises a diaphragm bag (131) and a diaphragm bracket (132) for pumping fluid, the membrane valve assembly (12) comprises a valve fixing seat (121) for setting a fluid inlet and outlet through hole of the diaphragm bag, and an inlet valve plate (122) and an outlet valve plate (123) for matching the fluid of the diaphragm bag (131) on the valve fixing seat, and an inlet and outlet cover plate (11) provided with a fluid inlet nozzle (15) and a fluid outlet nozzle (16), characterized in that It also includes a one-way valve device (20) arranged between the outlet cover plate of the diaphragm pump and the membrane valve assembly, the one-way valve device (20) including an elastic member (21), a valve membrane (22) and a valve seat (23); the elastic member (21) is installed against the inlet and outlet cover plates (11), a boss (231) with a central flow opening (232) is arranged on the valve seat (23), the valve membrane (22) is fixed on the boss (231), and a valve membrane (221) is arranged in the center of the valve membrane (22) to fit the central flow opening (232).

2. A diaphragm pump with an anti-drip check valve device according to claim 1, characterized in that The boss (231) also includes a radially arranged drainage channel (233), the first port of which is connected to the central flow port (232), and the second port (2332) is connected to the inlet of the fluid outlet nozzle (16), so as to guide the fluid from the central channel to the pump arranged along the periphery of the diaphragm pump housing.

3. A diaphragm pump with an anti-drip check valve device according to claim 2, characterized in that The fluid outlet nozzle (16) is arranged at the edge of the outlet cover plate (11) through the communication function of the drainage channel (233), and is symmetrically arranged with the fluid inlet nozzle (15).

4. A diaphragm pump with an anti-drip check valve device according to claim 1, characterized in that It also includes an inlet channel (30) connected to the fluid inlet nozzle (15), wherein the inlet channel (30) includes a first inlet (31) arranged on the valve membrane (22), and a second inlet (32) arranged on the boss (231) corresponding to the first inlet (31).

5. A diaphragm pump with an anti-drip check valve device according to claim 1, 2, 3 or 4, characterized in that It also includes a reflux device (40), which includes a first reflux port (41) arranged on the valve membrane (22), and a second reflux port (42) arranged on the boss (231) and corresponding to the first inlet (31).

6. A diaphragm pump with an anti-drip check valve device according to claim 5, characterized in that The first reflux port (41) of the reflux device (40), the first inlet (31) of the inlet channel (30), and the second port (2332) of the central flow port (232) form a triangle and are arranged along the outer periphery of the diaphragm pump housing.

7. A diaphragm pump with an anti-drip check valve device according to claim 6, characterized in that The diameters C of the first reflux port (41) and the second reflux port (42) of the reflux device (40) are smaller than the channel diameter D of the inlet channel (30).

8. A diaphragm pump with an anti-drip check valve device according to claim 7, characterized in that The reflux device (40) is directly connected to one of the diaphragm bags (131).

9. A diaphragm pump with an anti-drip check valve device according to claim 1, characterized in that The inlet and outlet cover plate (11) is provided with a one-way valve cavity (111) conforming to the boss (231), and the one-way valve cavity (111) protrudes from the outer surface of the inlet and outlet cover plate (11).

10. A diaphragm pump with an anti-drip check valve device according to claim 9, characterized in that An elastic member installation groove (112) is provided at the center of the one-way valve cavity (111), and the elastic member installation groove (112) protrudes from the outer surface of the one-way valve cavity (111).