One-way valve assembly and micro water pump

Abstract

The one-way valve assembly can be arranged on the micro water pump, the one-way valve assembly comprises a base and a reed valve, the base is provided with a fluid channel and is provided with a base body and a boss protruding outwards relative to the base body, and a contact face inclining relative to the base body is formed on the boss. A through hole is formed in the contact surface of the fluid channel; the reed valve is provided with a mounting part and a tongue piece capable of swinging relative to the mounting part, the mounting part is fixedly arranged on the seat body, and when the reed valve is in a closed state, the tongue piece is in contact with the contact surface and covers the through opening. The miniature water pump is provided with at least one one-way valve assembly and further comprises a cover assembly provided with a water pumping cavity and a water pumping component movably arranged at the water pumping cavity, the cover assembly is provided with a fluid path for fluid to enter and leave the miniature water pump, and the one-way valve assemblies are arranged on the fluid path. The water pumping cavity and the fluid channel form a part of a fluid path.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field especially a valve subassembly and micro water pump for water pump. BACKGROUND

[0002] A reed valve suitable for being arranged on a fluid path of a micro water pump has a mounting portion fixed to the micro water pump and a tongue plate oscillatable relative to the mounting portion. When the tongue plate is deflected, the mounting portion applies a force to the tongue plate to return to a natural state (i.e. a state where the tongue plate is not deflected). Generally, the tongue plate of the reed valve is limited to oscillate only in a single direction, thereby limiting the flow direction of fluid in the micro water pump.

[0003] However, in the natural state, the force applied by the mounting portion to the tongue plate of the reed valve is considered to be zero. In the case where the micro water pump is stopped but the fluid pressure is high (e.g. when the motor of the micro water pump is stopped due to power failure but rotates due to inertia), the reed valve is easily opened. Therefore, the reed valve has a technical problem of being not tightly closed, and the micro water pump provided with the reed valve often has a dripping phenomenon. SUMMARY

[0004] To solve the technical problem of the reed valve not being tightly closed, the utility model aims to provide a one-way valve assembly and a micro water pump which are reliably closed.

[0005] To achieve the above-mentioned purpose, the utility model provides the following first technical scheme: a one-way valve assembly can be arranged on a micro water pump, the one-way valve assembly comprises a base and a reed valve, the base is provided with a fluid passage and has a seat body and a boss protruding outward relative to the seat body, the boss is formed with a contact surface inclined relative to the seat body, and the fluid passage is formed with an opening on the contact surface; the reed valve has a mounting portion and a tongue plate oscillatable relative to the mounting portion, the mounting portion is fixedly arranged on the seat body, and when the reed valve is in a closed state, the tongue plate contacts the contact surface and covers the opening.

[0006] In the first technical scheme, preferably, the contact surface and the seat body form an angle in the range of 2-10°.

[0007] In the first technical scheme, preferably, the mounting portion is provided with a corresponding stress groove on the end portion close to the tongue plate.

[0008] Further, the utility model still provides following second technical scheme: A micro water pump has at least one one-way valve assembly as any of above first technical scheme and its preferred scheme, the micro water pump still includes the cover assembly that forms with the pump water chamber and the pump water part that can move and set in pump water chamber, the cover assembly forms with the fluid path for fluid to enter and leave micro water pump, at least one one-way valve assembly is arranged on the fluid path, the pump water chamber and the fluid passage all constitute a part of the fluid path.

[0009] In the above-mentioned second technical scheme, preferably, the shell includes a top cover and a water inlet nozzle fixedly installed on the top cover, the pump water chamber is formed in the top cover, the water inlet nozzle defines a water inlet channel in fluid communication with the pump water chamber, and the one-way valve assembly is arranged on the water inlet nozzle or / and the top cover. Further, preferably, the base is formed on a side end of the water inlet nozzle close to the top cover, and the mounting portion is clamped between the base and the top cover.

[0010] In the above-mentioned second technical scheme, preferably, the shell includes a top cover and a water outlet nozzle fixedly installed on the top cover, the pump water chamber is formed in the top cover, the water outlet nozzle defines a water outlet channel in fluid communication with the pump water chamber, and the one-way valve assembly is arranged on the water outlet nozzle or / and the top cover. Further, preferably, the base is formed on the top cover, and the mounting portion is clamped between the base and the water outlet nozzle.

[0011] In the above-mentioned second technical scheme, preferably, the micro water pump further includes a motor for driving the pump water part and a transmission mechanism for achieving transmission connection between the motor and the pump water part. Further, preferably, the motor is provided with an output gear, the transmission mechanism includes a crown gear engaged with the output gear, an eccentric block fixedly arranged on the crown gear, and a connecting rod matched with the eccentric block, and a side end of the connecting rod away from the eccentric block is fixedly connected with the pump water part.

[0012] Compared with the prior art, the first technical scheme of the utility model provides a one-way valve assembly, when the reed valve is in a closed state, the tongue plate contacts the inclined contact surface and is in a deflection state. Thus, the reed valve can close the fluid channel with a certain pre-tightening force, which overcomes the technical problem of loose closing of the reed valve in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the one-way valve assembly provided by the utility model;

[0014] Figure 2This is a perspective view of the reed valve provided by this utility model;

[0015] Figure 3 A perspective view of the base provided by this utility model;

[0016] Figure 4 A curve showing the relationship between the tongue's swing angle and the force applied to the tongue, provided by this utility model.

[0017] Figure 5 A perspective view of the miniature water pump provided by this utility model;

[0018] Figure 6 for Figure 5 A cross-sectional view of the miniature water pump shown;

[0019] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0020] The image is labeled as follows:

[0021] 100. Miniature water pump;

[0022] 1. Base; 11. Seat body; 12. Boss; 121. Contact surface; 122. Through port;

[0023] 2. Reed valve; 21. Mounting part; 22. Tongue; 23. Gap; 24. Connection position; 25. Stress groove; 3. Housing; 31. First housing; 32. Second housing; 33. Cover assembly; 34. Pump chamber; 35. Top cover; 36. Inlet nozzle; 361. Inlet channel; 37. Outlet nozzle; 371. Outlet channel; 38. First check valve assembly; 39. Second check valve assembly;

[0024] 4. Pump components;

[0025] 5. Motor; 51. Output gear;

[0026] 61. Gear shaft; 62. Crown gear; 63. Eccentric block; 64. Connecting rod. Detailed Implementation

[0027] To explain in detail the technical content, structural features, achieved objectives and effects of this application, the technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings.

[0028] In this application, spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper", "on", "higher", "side" (as in "sidewall") and the like, can be used herein for ease of description to describe one element's or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use, operation and / or manufacture in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0029] The utility model provides a check valve assembly, it aims at realizing that reed valve can close fluid passage with certain pre -tightening force, with solve reed valve of prior art not to be tight the technical problem of closing.

[0030] Refer to Figure 1 It shows the first embodiment - check valve assembly provided by the utility model, the component includes the base 1 that forms with fluid passage (not marked out in the drawing) and the reed valve 2 that carries on the base 1.It needs to be explained, this check valve assembly is applicable to any micro water pump, its base can be the component that sets up in the corresponding water pump alone, also can be integrally formed on the other component of water pump, the fluid passage formed on the base can be the water inlet flow channel of water pump, the water outlet flow channel or the flow channel of any configurable check valve, or the part of above-mentioned flow channel.

[0031] Combine Figure 2 The reed valve 2 is flat, it has the installation portion 21 of ring shape and the tongue 22 that can swing relative to installation portion 21, and the gap 23 is formed between the tongue 22 in the inside of installation portion 21 and installation portion 21.When the tongue 22 is deflected, installation portion 21 will apply the restoring force that makes it reset to natural state to the tongue 22.

[0032] The force between the tongue 22 and the mounting portion 21 mainly occurs at the connecting position 24 (there is no strict connecting position 24 in the spring valve 2 provided by the embodiment due to the stress groove 25 below, so it is shown by a dashed line in the figure) of the two. After the tongue 22 is repeatedly deflected, the connecting position 24 is prone to breakage due to metal fatigue. Therefore, the spring valve 2 provided by the embodiment is also provided with a pair of stress grooves 25, which are located on the end of the mounting portion 21 close to the tongue 22 and extend from the connecting position 24 to the inside of the mounting portion 21. In this way, the force between the tongue 22 and the mounting portion 21 can be dispersed on the mounting portion 21 through a pair of stress grooves 25 to alleviate the problem of metal fatigue.

[0033] In combination Figure 3 , the base 1 includes a seat body 11 and a boss 12 protruding outward relative to the seat body 11, and a fluid passage is formed in the inside of the seat body 11. The mounting portion 21 of the spring valve 2 is fixed to the seat body 11 of the base 1, which can be fixed by being clamped together by the seat body 11 and a third component, or can be fixed by being clamped or glued, which is not limited here.

[0034] The boss 12 has a contact surface 121 adapted to contact the spring valve 2, and the fluid passage has an opening 122 (which can be an inlet or an outlet of the fluid passage) formed on the contact surface 121. The contact surface 121 is inclined relative to the seat body 11, and when the spring valve 2 is in a closed state, the tongue 22 of the spring valve 2 contacts the contact surface 121 and covers the opening 122 of the fluid passage. In this state, a certain angle is formed between the tongue 22 and the mounting portion 21, so that the mounting portion 21 continuously applies a certain pre-tightening force to the tongue 22 to prevent the tongue 22 from being closed too loosely.

[0035] Further, Figure 4 A graph showing the relationship between the swing angle of the tongue 22 and the force applied by the mounting portion 21 to the tongue 22 is shown. It can be seen that the stress curve of the tongue 22 increases with the increase of the swing angle, and the change gradient gradually rises. When selecting the angle α between the contact surface 121 and the seat body 11, the tongue 22 should have a certain pre-tightening force (represented by the part greater than F a in the figure), but the pre-tightening force should not be too large to interfere with the normal work of the corresponding pump water component (represented by the part less than F b in the figure). At the same time, considering the inevitable manufacturing errors of the base 1, the error angle generated is within ±0.5°. Therefore, if the selected angle is less than 2°, the pre-tightening force of part of the actually produced spring valve 2 may be less than F a , which cannot achieve the technical effect of closing concealment; if the selected angle is greater than 10°, the pre-tightening force of part of the actually produced spring valve 2 may be greater than F b, interferes with the normal operation of the water pumping component. Thus, the contact surface 121 of the present embodiment is angled with respect to the seat body 11 within a range of 2-10° (including both end points).

[0036] With continued reference to Figures 5-6 which shows a second embodiment - a micro water pump 100, which is provided with at least one one-way valve assembly as shown in the first embodiment. The micro water pump 100 further comprises a housing 3, a water pumping component 4 movably arranged in the housing 3, a motor 5 for driving the water pumping component 4 to move, and a transmission mechanism for achieving the transmission connection between the water pumping component 4 and the motor 5.

[0037] The housing 3 comprises a first housing 31, a second housing 32 detachably connected to the first housing 31, and a cover assembly 33 fixedly arranged at the top of the first and second housings. The first housing 31 and the second housing 32 jointly define a transmission cavity (not labeled in the figure) for accommodating the transmission mechanism. The motor 5 is provided with an output gear 51, and the transmission mechanism comprises a gear shaft 61 fixedly arranged in the housing 3, a crown gear 62 rotatably mounted on the gear shaft 61, an eccentric block 63 fixedly arranged on the crown gear 62, and a connecting rod 64 cooperating with the eccentric block 63. The output gear 51 of the motor 5 extends into the transmission cavity and engages the crown gear 62, and the connecting rod 64 is fixedly connected to the water pumping component 4 at a side end portion thereof away from the eccentric block 63. Thus, the motor 5 can drive the water pumping component 4 to move periodically.

[0038] In combination Figure 7 The cover assembly 33 is formed with a fluid path (not labeled in the figure) for fluid to enter and exit the micro water pump 100, and the fluid path has a pump water cavity 34, and the water pumping component 4 is arranged at the pump water cavity 34. The one-way valve assembly on the micro water pump 100 is also arranged on the fluid path to define the one-way flow of fluid. Thus, the micro water pump 100 achieves the periodic suction and pumping of fluid through the periodic movement of the water pumping component 4 and the cooperation of the at least one one-way valve assembly.

[0039] Specifically, the cover assembly 33 comprises a top cover 35, a water inlet nozzle 36 fixedly mounted on the top cover 35, and a water outlet nozzle 37 fixedly mounted on the top cover 35. The pump water cavity 34 is formed on the top cover 35, and the water pumping component 4 is sealingly connected to the top cover 35.

[0040] The inlet nozzle 35 is formed with an inlet passage 361 for fluid to enter the micro water pump 100, which is in fluid communication with the pumping chamber 34. The micro water pump 100 further comprises a first one-way valve assembly 38 disposed on the inlet nozzle 36. The base (not shown in the figure) of the first one-way valve assembly 38 is formed on the side end of the inlet nozzle 36 close to the top cover 33, and the fluid passage of the base constitutes part of the inlet passage 361. The mounting portion of the reed valve of the first one-way valve assembly 38 is clamped between the inlet nozzle 36 and the top cover 35, and the tongue is configured to allow fluid to flow from the inlet passage 361 into the pumping chamber 34 only.

[0041] The outlet nozzle 37 is formed with an outlet passage 371 for fluid to exit the micro water pump 100, which is in fluid communication with the pumping chamber 34. The micro water pump 100 further comprises a second one-way valve assembly 39 disposed on the top cover 35 and the outlet nozzle 37. The base (not shown in the figure) of the second one-way valve assembly 39 is formed on the top of the top cover 35, and the fluid passage of the base constitutes part of the pumping chamber. The mounting portion of the reed valve of the second one-way valve assembly 39 is clamped between the top cover 35 and the outlet nozzle 37, and the tongue is configured to allow fluid to enter the outlet passage 371 from the pumping chamber 34 only.

[0042] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit of the present application should be covered within the protection scope of the present application.

Claims

1. A one-way valve assembly, which can be configured on a micro water pump, characterized in that, The one-way valve assembly includes a base and a reed valve. The base has a fluid channel and a seat body and a boss protruding outward relative to the seat body. A contact surface inclined relative to the seat body is formed on the boss. An opening is formed on the contact surface of the fluid channel. The reed valve has a mounting part and a tongue that can swing relative to the mounting part. The mounting part is fixedly mounted on the seat body. When the reed valve is in the closed state, the tongue contacts the contact surface and covers the opening.

2. The one-way valve assembly according to claim 1, characterized in that, The angle between the contact surface and the seat body is in the range of 2-10°.

3. The one-way valve assembly according to claim 1, characterized in that, A pair of stress grooves are provided on the end of the mounting part near the tongue.

4. A miniature water pump having at least one check valve assembly as described in any one of claims 1-3, characterized in that, The micro water pump further includes a cover assembly forming a pump chamber and a pumping component movably disposed at the pump chamber. The cover assembly forms a fluid path for fluid to enter and exit the micro water pump. At least one check valve assembly is disposed on the fluid path. The pump chamber and the fluid passage both constitute part of the fluid path.

5. The micro water pump according to claim 4, characterized in that, The cover assembly includes a top cover and a water inlet fixedly mounted on the top cover. The pump chamber is formed inside the top cover. The water inlet defines a water inlet channel that communicates with the pump chamber. The one-way valve assembly is disposed on the water inlet and / or the top cover.

6. The micro water pump according to claim 5, characterized in that, The base is formed on the end of the water inlet near the top cover, and the mounting part is clamped between the base and the top cover.

7. The micro water pump according to claim 4, characterized in that, The cover assembly includes a top cover and a water outlet fixedly mounted on the top cover. The pump chamber is formed inside the top cover. The water outlet defines a water outlet channel that communicates with the pump chamber. The one-way valve assembly is disposed on the water outlet and / or the top cover.

8. The micro water pump according to claim 7, characterized in that, The base is formed on the top cover, and the mounting part is clamped between the base and the water outlet.

9. The micro water pump according to any one of claims 4-8, characterized in that, It also includes a motor for driving the water pump component and a transmission mechanism for driving the motor and the water pump component.

10. The micro water pump according to claim 9, characterized in that, The motor is equipped with an output gear, and the transmission mechanism includes a crown gear that meshes with the output gear, an eccentric block fixedly mounted on the crown gear, and a connecting rod that cooperates with the eccentric block. The end of the connecting rod away from the eccentric block is fixedly connected to the pumping component.

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