Air pump assembly with one-way valve

Abstract

The utility model provides an air pump assembly with a one-way valve, which comprises a shell, an air pump, the one-way valve and a valve cover, the shell comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber through a first pipeline, and the third chamber is communicated with the second chamber through a second pipeline; a first opening used for assembling an air pump is formed in the side, away from the first pipeline, of the first cavity, the air pump is provided with an air outlet port, and the air outlet port is in sealed connection with the first pipeline, so that air exhausted by the air pump can enter the first pipeline through the air outlet port; the one-way valve is arranged in the second cavity so that gas exhausted by the gas pump can enter the third cavity through the one-way valve. The valve cover is fixedly connected with the shell, at least one part of the path of the first pipeline is jointly defined by the shell and the valve cover, the flowing path of airflow located in the shell is limited through the shell and the valve cover, pipeline connection between components is reduced, the assembly efficiency can be effectively improved, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle testing technology, and more specifically, to an air pump assembly with a one-way valve for leak diagnosis in an automotive evaporative emission system. Background Technology

[0002] With the increasing severity of vehicle exhaust pollution, the regulations on vehicle exhaust emissions have become increasingly stringent in terms of the limits on vehicle emissions. Therefore, it is essential to detect leaks in the fuel tank and the entire evaporative emission system, which consists of the fuel tank and the evaporative piping, during vehicle use. In this process, fuel tank leak diagnostic modules have emerged.

[0003] The existing leak diagnosis module used in the technology center requires the air pump to work continuously to pressurize the system. At the same time, it needs to cooperate with components such as solenoid valves to switch the air path. This often requires the installation of multiple components, resulting in complex piping, a cumbersome installation process, and a large amount of manpower costs.

[0004] Therefore, existing technologies suffer from technical problems such as complex piping and cumbersome installation processes in leak diagnosis modules. Utility Model Content

[0005] The main objective of this invention is to provide an air pump assembly with a one-way valve to solve the technical problems of complex piping and cumbersome installation in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, an air pump assembly with a one-way valve is provided, the air pump assembly comprising:

[0007] The housing includes a first chamber, a second chamber, and a third chamber, wherein the first chamber and the second chamber are connected by a first pipe, and the third chamber and the second chamber are connected by a second pipe;

[0008] An air pump, wherein the first chamber has a first opening for mounting the air pump on the side away from the first pipeline, the air pump has an air outlet port, the air outlet port being sealed to the first pipeline, so that the gas discharged by the air pump can enter the first pipeline through the air outlet port;

[0009] A one-way valve is disposed in the second chamber so that the gas discharged by the air pump can enter the third chamber through the one-way valve;

[0010] A valve cover is fixedly connected to the housing, and at least a portion of the path of the first pipeline is formed by the housing and the valve cover together.

[0011] Further, the one-way valve includes: a valve seat, which is sealed and fixedly connected to the second chamber, the valve seat having a mounting hole located at the center of the valve seat and at least one vent hole located around the mounting hole; and an umbrella valve, which is fixedly connected to the valve seat through the mounting hole, at least a portion of the umbrella valve being made of an elastic material, the elastic material covering the vent hole.

[0012] Furthermore, an elastic seal is provided between the valve seat and the second chamber.

[0013] Furthermore, the umbrella valve includes a valve stem and an umbrella-shaped sealing part. The valve stem is connected to the mounting hole, and a positioning part is provided on the valve stem. The positioning part can abut against the side of the valve seat near the first chamber.

[0014] Furthermore, the umbrella-shaped sealing part is made of rubber, and the umbrella-shaped sealing part can seal the vent hole.

[0015] Furthermore, the valve cover is provided with a positioning groove, which can abut against the end of the valve stem.

[0016] Furthermore, the valve cover is provided with a plurality of positioning ribs extending into the second chamber.

[0017] Furthermore, the inner wall of the second chamber is provided with a positioning step that can abut against the valve seat.

[0018] Furthermore, the air pump is a diaphragm pump.

[0019] Furthermore, the elastic seal is an O-ring.

[0020] The air pump assembly with a one-way valve provided by this utility model adopts an integrated housing structure and is fixedly connected to the housing through a valve cover. This limits the flow path of the airflow inside the housing through the housing and the valve cover, reduces the pipeline connections between components, effectively improves assembly efficiency, and reduces labor costs. The umbrella valve in the second chamber helps to improve the sealing performance of the product. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of an air pump assembly with a one-way valve according to the present invention is shown.

[0023] Figure 2 A schematic diagram of the structure of the housing according to the present invention is shown;

[0024] Figure 3 A schematic diagram of the one-way valve according to the present invention is shown;

[0025] Figure 4 A schematic diagram of the valve cover according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Housing; 11. First chamber; 12. Second chamber; 121. Positioning step; 13. Third chamber; 14. First pipeline; 15. Second pipeline; 20. Air pump; 30. One-way valve; 31. Valve seat; 311. Vent hole; 32. Umbrella valve; 33. Elastic seal; 40. Valve cover; 41. Positioning groove; 42. Positioning rib. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] To address the technical problems of complex piping and cumbersome installation in existing technologies, this utility model provides an air pump assembly with a one-way valve.

[0032] like Figures 1 to 4 As shown, this utility model provides an air pump assembly with a one-way valve. The air pump assembly includes a housing 10, an air pump 20, a one-way valve 30, and a valve cover 40. The housing 10 includes a first chamber 11, a second chamber 12, and a third chamber 13. The first chamber 11 and the second chamber 12 are connected by a first pipe 14, and the second chamber 12 and the third chamber 13 are connected by a second pipe 15. The first chamber 11 has a first opening on the side away from the first pipe 14 for assembling the air pump 20. The air pump 20 has an inlet port and an outlet port. The outlet port is sealed to the first pipe 14. External air enters the air pump 20 through the inlet port, is pressurized inside the air pump 20, and then exits from the air pump 20. Gas discharged from the air pump 20 can enter the first pipeline 14 through the air outlet port; the one-way valve 30 is disposed in the second chamber 12 so that the high-pressure gas discharged from the air pump 20 can enter the third chamber 13 through the one-way valve 30; at the same time, due to the presence of the one-way valve 30, the gas in the third chamber 13 cannot enter the first chamber 11 through the first pipeline 14; the valve cover 40 is fixedly connected to the housing 10, and at least a part of the path of the first pipeline 14 is jointly enclosed by the housing 10 and the valve cover 40, thereby limiting the flow path of the airflow inside the housing 10 through the housing 10 and the valve cover 40, reducing the airflow connection between components, effectively improving assembly efficiency and reducing labor costs.

[0033] The valve cover 40 and the housing 10 can be fixed together, for example, by laser welding. In use, the one-way valve 30 is first installed and fixed in the second chamber 12. After the assembly of the one-way valve 30 is completed, the valve cover 40 is welded and fixed to the housing 10 to achieve a seal. At least a part of the air pump 20 enters the first chamber 11 through the first opening of the housing 10 and is fixed to the housing 10 by screws.

[0034] Further, the one-way valve 30 includes a valve seat 31 and an umbrella valve 32. The valve seat 31 is sealed and fixedly connected to the second chamber 12. The valve seat 31 has a mounting hole located at the center of the valve seat 31 and at least one vent hole 311 located around the mounting hole. When there are two or more vent holes 311, the vent holes 311 are evenly distributed around the mounting hole. The umbrella valve 32 is fixedly connected to the valve seat 31 through the mounting hole. At least a portion of the umbrella valve 32 is made of an elastic material, and the elastic material covers the vent holes 311, thereby achieving… The vent 311 is now sealed. When the pressure in the second chamber 12 is greater than the pressure in the third chamber 13, the pressure pushes the umbrella valve 32 covering the vent 311 through the vent 311, thus entering the third chamber 13 through the gap between the umbrella valve 32 and the valve seat 31. When the pressure in the third chamber 13 is greater than that in the second chamber 12, the high pressure in the third chamber 13 acts on the surface of the umbrella valve 32, pressing the umbrella valve 32 against the surface of the valve seat 31, thereby sealing the vent 311 and preventing airflow from the third chamber 13 to the second chamber 12.

[0035] To improve the airtightness between the one-way valve 30 and the housing 10, an elastic seal 33 is provided between the valve seat 31 and the second chamber 12. The outer periphery of the valve seat 31 is provided with an installation groove for installing the elastic seal 33. The installation groove facilitates the installation and positioning of the elastic seal 33. Preferably, the elastic seal 33 can be, for example, an O-ring.

[0036] like Figure 3 As shown, the umbrella valve 32 includes a valve stem and an umbrella-shaped sealing part, wherein the valve stem and the umbrella-shaped sealing part are integrally formed, the valve stem is connected to the mounting hole, and the outer diameter of the valve stem gradually decreases from the end connected to the umbrella-shaped sealing part to the end away from the umbrella-shaped sealing part. A positioning part is provided on the valve stem, and the positioning part can abut against the side of the valve seat 31 near the first chamber 11. This arrangement is beneficial for the assembly and fixation between the valve stem and the valve seat 31.

[0037] The umbrella-shaped sealing part is made of rubber and can cover the vent 311, thereby achieving a one-way seal on the vent 311.

[0038] Furthermore, such as Figure 4 The valve cover 40 is provided with a positioning groove 41, which can abut against the end of the valve stem, thereby facilitating the positioning of the one-way valve 30; the valve cover 40 is also provided with a plurality of positioning ribs 42 extending toward the second chamber 12, which can realize the positioning between the valve cover 40 and the second chamber 12, thereby facilitating assembly and fixation during installation.

[0039] In another embodiment of this application, a positioning step 121 that can abut against the valve seat 31 is also provided on the inner wall of the second chamber 12. When the valve seat 31 is assembled with the second chamber 12, the end of the valve seat 31 abuts against the end face of the positioning step 121, thereby realizing the axial positioning of the valve seat 31. This arrangement can effectively prevent the valve seat 31 from moving around in the second chamber 12 and improve the stability of the product during use.

[0040] Furthermore, the air pump 20 may be, for example, a diaphragm pump.

[0041] The air pump assembly with a one-way valve provided in this application adopts an integrated housing 10 structure and is fixedly connected to the housing 10 by a valve cover 40. This limits the flow path of the airflow inside the housing 10 by the housing 10 and the valve cover 40, reducing the pipeline connections between components, effectively improving assembly efficiency and reducing labor costs. The umbrella valve 32 provided in the second chamber 12 helps to improve the sealing performance of the product.

[0042] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air pump assembly with a one-way valve, characterized in that, The air pump assembly includes: The housing has a first chamber, a second chamber, and a third chamber formed therein. The first chamber and the second chamber are connected by a first pipe, and the third chamber and the second chamber are connected by a second pipe. An air pump, wherein the first chamber has a first opening for mounting the air pump on the side away from the first pipeline, the air pump has an air outlet port, the air outlet port being sealed to the first pipeline, so that the gas discharged by the air pump can enter the first pipeline through the air outlet port; A one-way valve is disposed in the second chamber so that the gas discharged by the air pump can enter the third chamber through the one-way valve; A valve cover is fixedly connected to the housing, and at least a portion of the path of the first pipeline is formed by the housing and the valve cover together.

2. The air pump assembly with a one-way valve according to claim 1, characterized in that, The one-way valve includes: A valve seat, which is sealed and fixedly connected to the second chamber, has a mounting hole located at the center of the valve seat and at least one vent hole located around the mounting hole; An umbrella-shaped valve is fixedly connected to the valve seat through the mounting hole. At least a portion of the umbrella-shaped valve is made of an elastic material, which covers the vent hole.

3. The air pump assembly with a one-way valve according to claim 2, characterized in that, An elastic seal is provided between the valve seat and the second chamber.

4. The air pump assembly with a one-way valve according to claim 2, characterized in that, The umbrella valve includes a valve stem and an umbrella-shaped sealing part. The valve stem is connected to the mounting hole and a positioning part is provided on the valve stem. The positioning part can abut against the side of the valve seat near the first chamber.

5. The air pump assembly with a one-way valve according to claim 4, characterized in that, The umbrella-shaped sealing part is made of rubber and can seal the vent hole.

6. The air pump assembly with a one-way valve according to claim 4, characterized in that, The valve cover is provided with a positioning groove, which can abut against the end of the valve stem.

7. The air pump assembly with a one-way valve according to claim 1, characterized in that, The valve cover is provided with multiple positioning ribs extending into the second chamber.

8. The air pump assembly with a one-way valve according to claim 1, characterized in that, The inner wall of the second chamber is provided with a positioning step that can abut against the valve seat.

9. The air pump assembly with a one-way valve according to claim 1, characterized in that, The air pump is a diaphragm pump.

10. The air pump assembly with a one-way valve according to claim 3, characterized in that, The elastic seal is an O-ring.

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