One-way valve and automobile air conditioner

Abstract

The one-way valve comprises a valve body and an elastic sealing piece, a flow channel is formed in the valve body, a sealing cavity is formed in the flow channel, and the elastic sealing piece is fixedly arranged in the flow channel and used for cutting off the flow channel; the elastic sealing piece divides the flow channel into a first flow channel and a second flow channel, the sealing cavity is arranged between the first flow channel and the second flow channel, and the first flow channel is communicated with the second flow channel through the sealing cavity; a sealing end is arranged on the elastic sealing piece and extends into the sealing cavity, a sealing cavity wall is arranged at the end, facing the first flow channel, of the sealing cavity, and the sealing end is in contact sealing with the sealing cavity wall through the elastic force of the elastic sealing piece so as to prevent the first flow channel from being communicated with the second flow channel; when a medium in the flow channel flows from the first flow channel to the second flow channel, the elastic force of the elastic sealing piece can be overcome to drive the sealing end to move towards the second flow channel, so that contact sealing between the sealing end and the wall of the sealing cavity is relieved, and the first flow channel communicates with the second flow channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a check valve and an automobile air conditioner. Background Technique

[0002] With the rapid development of electric vehicle technology and the increasing market demand, automobile enterprises have put forward more stringent requirements for various performance indicators of electric vehicles, especially in terms of stability and reliability under extreme working conditions. Among them, the wading ability of electric vehicles, as one of the important indicators to measure their ability to cope with complex and changeable environments, has received wide attention. However, in actual applications, when an electric vehicle is driving through water, it often faces the problem of water ingress into the air conditioner drainage system. This phenomenon seriously affects the normal function of the air conditioner, reduces the driving experience of users, and may even cause more serious vehicle failures.

[0003] Specifically, when an electric vehicle is driving under wading conditions, if the water accumulation depth exceeds a certain threshold, water may penetrate into the air conditioner interior through the interface or gap of the air conditioner drain pipe. The air conditioner system generates condensate during the refrigeration process, and this condensate should originally be discharged outside the vehicle smoothly through the drain pipe. However, once external water sources invade, it will not only increase the burden on the drainage system, but also may cause a series of problems such as drain pipe blockage, internal component corrosion, and electrical component short circuit, thus seriously affecting the refrigeration effect of the air conditioner and even causing the air conditioner to completely fail.

[0004] In the prior art, to address the problem of water ingress into the air conditioner drain pipe, measures such as strengthening the sealing performance, optimizing the drainage path, and regular cleaning and maintenance are mainly adopted to reduce the risk of water ingress. However, these methods are still insufficient when dealing with extreme wading conditions and cannot completely avoid the situation of water entering the air conditioner interior from the drain pipe. Therefore, developing a device or method that can effectively block external water sources from entering the air conditioner interior while not affecting the normal drainage function has become an urgent technical problem to be solved currently. Summary of the Utility Model

[0005] To solve the above problems, the purpose of the utility model is to provide a check valve and an automobile air conditioner. The drainage valve can effectively block external water sources from entering the air conditioner interior while not affecting the normal drainage function.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A check valve includes a valve body and an elastic seal. A flow channel is provided in the valve body, a sealing cavity is provided on the flow channel, and the elastic seal is fixedly arranged in the flow channel and used to cut off the flow channel;

[0008] The elastic seal divides the flow channel into a first flow channel and a second flow channel. The sealing cavity is arranged between the first flow channel and the second flow channel, and the first flow channel communicates with the second flow channel through the sealing cavity;

[0009] The elastic seal is provided with a sealing end which extends into the sealing cavity. One end of the sealing cavity facing the first flow channel is provided with a sealing cavity wall, and the sealing end is in contact with and sealed against the sealing cavity wall by the elastic force of the elastic seal to prevent the first flow channel from communicating with the second flow channel;

[0010] When the medium in the flow channel flows from the first flow channel to the second flow channel, it can overcome the elastic force of the elastic seal and drive the sealing end to move towards the second flow channel, so as to release the contact seal between the sealing end and the sealing cavity wall, and make the first flow channel communicate with the second flow channel.

[0011] According to an embodiment of the present invention, the sealing cavity is an annular cavity which surrounds the flow channel, and the inner side in the radial direction of the sealing cavity communicates with the flow channel; the sealing end is the outer end on the circumferential side in the radial direction of the elastic seal.

[0012] According to an embodiment of the present invention, at least one limiting member is arranged on the cavity wall at one end of the sealing cavity facing the second flow channel, and the limiting member is used for limiting the sealing end to prevent the sealing end from contacting the cavity wall at one end of the sealing cavity facing the second flow channel.

[0013] According to an embodiment of the present invention, the limiting member is a limiting convex block.

[0014] According to an embodiment of the present invention, a fixing structure is arranged in the flow channel. The fixing structure is arranged along the radial direction of the flow channel and is fixedly connected with the inner wall of the flow channel. The elastic seal is connected with the fixing structure, and the fixing structure is hollowed out for the medium to pass through.

[0015] According to an embodiment of the present invention, a clamping hole is arranged on the fixing structure, and a clamping cap is arranged on the elastic seal. The clamping cap is clamped in the clamping hole to connect the elastic seal with the fixing structure.

[0016] According to an embodiment of the present invention, one end of the second flow channel facing the sealing cavity gradually expands towards the sealing cavity to form a conical surface.

[0017] According to an embodiment of the present invention, the valve body comprises a first shell and a second shell which are connected to each other. The first flow channel is arranged in the first shell, the second flow channel is arranged in the second shell, the sealing cavity is arranged between the first shell and the second shell, and the sealing cavity wall is the end wall of the first shell at one end facing the second shell.

[0018] According to an embodiment of the present utility model, a buckle for connecting with an installation position is provided on the outer wall of the second housing.

[0019] According to an embodiment of the present utility model, one end of the second housing facing the first housing is provided with a mounting flange, and a sealing gasket is provided at one end of the mounting flange away from the first housing, and the sealing gasket is used for fitting with the installation position.

[0020] According to an embodiment of the present utility model, the elastic sealing member is an elastic diaphragm.

[0021] Based on the same concept, the present utility model further provides an automotive air conditioner, including the check valve described in any one of the above, including a drain pipe, and the check valve is connected to the drain pipe.

[0022] Due to the adoption of the above technical solutions, the present utility model has the following advantages and positive effects compared with the prior art:

[0023] 1. When the medium in the flow channel of the present utility model flows from the first flow channel to the second flow channel, it can overcome the elastic force of the elastic sealing member to drive the sealing end to move towards the second flow channel, so as to release the contact seal between the sealing end and the sealing cavity wall, so that the first flow channel and the second flow channel are communicated, so that the medium can be smoothly discharged. When the medium flows in the reverse direction, it will not affect the contact seal between the sealing end and the sealing cavity wall, realizing the functions of forward flow and reverse sealing.

[0024] 2. At least one limiting member is provided on the cavity wall at one end of the sealing cavity facing the second flow channel of the present utility model. The function of these limiting members is to limit the position of the sealing end to prevent it from contacting the cavity wall at one end of the sealing cavity facing the second flow channel. On the surface, the limiting member is to limit the sealing end, but in fact it also has two important functions: First, it can reduce the length of the sealing cavity, and then reduce the size of the whole valve, making it more compact, because the limiting member can ensure that the sealing end will not contact the cavity wall at one end of the sealing cavity facing the second flow channel, and can ensure forward flow. If the length of the sealing cavity is increased so that the sealing end does not contact the cavity wall at one end of the sealing cavity facing the second flow channel when deforming, the overall size will be too large; Second, the existence of the limiting member can increase the design margin of the elastic force of the elastic sealing member, which means that even if the elastic force of the elastic sealing member is slightly larger or smaller, it can ensure the normal operation of the valve. Especially when the elastic force of the elastic sealing member is small and it will generate a large deformation when pushed by the medium, the limiting member can ensure that the sealing end will not contact the cavity wall at one end of the sealing cavity facing the second flow channel, so that the first flow channel and the second flow channel can remain in a connected state, ensuring that the medium can pass through smoothly. Description of the Drawings

[0025] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the accompanying drawings, where:

[0026] Figure 1 is an axonometric view of the present utility model;

[0027] Figure 2 is a sectional view of the present utility model;

[0028] Figure 3 is a schematic diagram of the reverse water flow of the present utility model;

[0029] Figure 4 is a schematic diagram of the forward water flow of the present utility model;

[0030] Figure 5 is a schematic diagram of the first housing of the present utility model;

[0031] Figure 6 is a schematic diagram of the second housing of the present utility model.

[0032] Explanation of reference numerals:

[0033] 1. First housing; 2. First flow channel; 3. Fixing structure; 4. Card hole; 5. Second housing; 6. Second flow channel; 7. Limiting convex block; 8. Conical surface; 9. Snap fastener; 10. Mounting flange; 11. Sealing cavity; 12. Elastic diaphragm; 13. Card cap; 14. Sealing end; 15. Sealing gasket. Specific implementation manners

[0034] The following further elaborates on the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0036] Embodiment 1

[0037] Refer to Figures 1 to 6 , the core of the present utility model is to provide a check valve, including a valve body and an elastic seal. A flow channel is provided in the valve body, a sealing cavity is provided on the flow channel, and the elastic seal is fixedly arranged in the flow channel and used to cut off the flow channel.

[0038] The elastic seal divides the flow channel into a first flow channel and a second flow channel. A sealing cavity is arranged between the first flow channel and the second flow channel, and the first flow channel communicates with the second flow channel through the sealing cavity. The elastic seal is provided with a sealing end which extends into the sealing cavity. One end of the sealing cavity facing the first flow channel is provided with a sealing cavity wall, and the sealing end contacts and seals with the sealing cavity wall through the elastic force of the elastic seal to prevent the first flow channel from communicating with the second flow channel.

[0039] Refer to Figure 4 , when the medium in the flow channel flows forward and flows from the first flow channel to the second flow channel, it can overcome the elastic force of the elastic seal and drive the sealing end to move towards the second flow channel to relieve the contact seal between the sealing end and the sealing cavity wall, so that the first flow channel communicates with the second flow channel. Refer to Figure 3 , and when the medium in the flow channel flows reversely and flows from the second flow channel to the first flow channel, it will not affect the sealing of the elastic seal, and the first flow channel and the second flow channel are not connected. The functions of forward flow and reverse sealing are realized.

[0040] In this embodiment, the elastic seal is a circular elastic diaphragm. Of course, in other embodiments, the elastic seal can also be of other types, which is not limited in this embodiment.

[0041] Specifically, the sealing cavity is an annular cavity, the sealing cavity surrounds the flow channel, and the radially inner side of the sealing cavity communicates with the flow channel; the sealing end is the circumferential outer end of the elastic diaphragm in the radial direction.

[0042] At least one limiting member is arranged on the cavity wall of one end of the sealing cavity facing the second flow channel. The limiting member is used to limit the sealing end and limit the deformation amount of the elastic diaphragm to prevent the sealing end from contacting the cavity wall of one end of the sealing cavity facing the second flow channel. In this embodiment, the limiting member is a limiting bump, and several limiting bumps are arranged around the circumference of the flow channel.

[0043] On the surface, the limiting bump is used to limit the sealing end, but in fact it also has two important functions: First, it can reduce the length of the sealing cavity, and then reduce the size of the whole valve, making it more compact, because the limiting bump can ensure that the sealing end will not contact the cavity wall of one end of the sealing cavity facing the second flow channel, and can ensure forward flow. If the length of the sealing cavity is increased to prevent the sealing end from deforming and contacting the cavity wall of one end of the sealing cavity facing the second flow channel, the overall size will be too large; Second, the existence of the limiting bump can increase the design margin of the elastic force of the elastic seal, which means that even if the elastic force of the elastic seal is slightly too large or too small, it can ensure the normal operation of the valve. Especially when the elastic force of the elastic seal is small and it will produce a large deformation when pushed by the medium, at this time the limiting bump can ensure that the sealing end will not contact the cavity wall of one end of the sealing cavity facing the second flow channel, so that the first flow channel and the second flow channel can remain in a connected state and ensure that the medium can pass through smoothly.

[0044] A fixed structure is provided inside the flow channel. The fixed structure is arranged along the radial direction of the flow channel and is fixedly connected to the inner wall of the flow channel. The elastic diaphragm is connected to the fixed structure, and the fixed structure is hollowed out for the medium to pass through.

[0045] The elastic diaphragm and the fixed structure can be fixedly connected together by means such as assembly and welding. Specifically, in this embodiment, the fixed structure is provided with a clamping hole, and a clamping cap is provided at the middle position of the elastic diaphragm. The clamping cap is clamped in the clamping hole to connect the elastic diaphragm and the fixed structure.

[0046] Preferably, one end of the second flow channel facing the sealing cavity gradually expands towards the sealing cavity to form a conical surface. On the one hand, the conical surface is for guiding the medium and reducing the flow resistance, so that the medium can pass through the second flow channel better. On the other hand, it is also for preventing interference with the diaphragm.

[0047] In this embodiment, the valve body includes a first housing and a second housing connected to each other. The first flow channel is arranged inside the first housing, the second flow channel is arranged inside the second housing, the sealing cavity is arranged between the first housing and the second housing, the sealing cavity wall is the end wall of the first housing facing the second housing, the limiting convex block is arranged on the end wall of the second housing facing the first housing, and the fixed structure is arranged at one end of the first flow channel facing the second housing.

[0048] The first housing and the second housing can be connected by means such as welding and clamping. In this embodiment, the first housing and the second housing are connected by ultrasonic welding.

[0049] On the outer wall of the second housing, there are buckles for connecting to the installation position. One end of the second housing facing the first housing is provided with an installation flange. One end of the installation flange away from the first housing is provided with a sealing gasket. The sealing gasket is used to fit with the installation position. The sealing gasket is used for sealing and shock absorption and has the function of buffering and reducing noise. The sealing gasket can be specifically installed on the installation flange by gluing.

[0050] Embodiment 2

[0051] Another core of the present utility model is to provide an automotive air conditioner, including the check valve of Embodiment 1, and including a drain pipe. The check valve is connected to the drain pipe. Specifically, the check valve is connected to the vehicle body through the buckle of the second housing and is connected to the drain pipe through the first housing.

[0052] Through the check valve, water can be blocked outside the drain pipe without affecting the normal air conditioner drainage function.

[0053] The above has described in detail the embodiments of the present utility model in conjunction with the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, provided that these changes fall within the scope of the claims of the present utility model and its equivalent technologies, they still fall within the protection scope of the present utility model.

Claims

1. A check valve, characterized in that, It includes a valve body and an elastic seal. A flow channel is provided in the valve body. A sealing cavity is provided on the flow channel. The elastic seal is fixedly arranged in the flow channel and is used to cut off the flow channel. The elastic seal divides the flow channel into a first flow channel and a second flow channel. The sealing cavity is arranged between the first flow channel and the second flow channel. The first flow channel communicates with the second flow channel through the sealing cavity. A sealing end is provided on the elastic seal. The sealing end extends into the sealing cavity. A sealing cavity wall is provided at one end of the sealing cavity facing the first flow channel. The sealing end is in contact sealing with the sealing cavity wall through the elastic force of the elastic seal to prevent the first flow channel from communicating with the second flow channel. When the medium in the flow channel flows from the first flow channel to the second flow channel, it can overcome the elastic force of the elastic seal to drive the sealing end to move towards the second flow channel, so as to release the contact sealing between the sealing end and the sealing cavity wall, and make the first flow channel communicate with the second flow channel.

2. The one-way valve according to claim 1, characterized in that, The sealing cavity is an annular cavity. The sealing cavity surrounds the flow channel, and the radially inner side of the sealing cavity communicates with the flow channel. The sealing end is the circumferential outer end of the elastic seal in the radial direction.

3. The one-way valve according to claim 1, characterized in that, At least one limiting member is provided on the cavity wall of the sealing cavity at one end facing the second flow channel. The limiting member is used to limit the sealing end to prevent the sealing end from contacting the cavity wall of the sealing cavity at one end facing the second flow channel.

4. The one-way valve according to claim 3, characterized in that, The limiting member is a limiting convex block.

5. The one-way valve according to claim 1, characterized in that, A fixing structure is provided in the flow channel. The fixing structure is arranged along the radial direction of the flow channel and is fixedly connected to the inner wall of the flow channel. The elastic seal is connected to the fixing structure, and the fixing structure is hollowed out for the medium to pass through.

6. The one-way valve according to claim 5, characterized in that, A clamping hole is provided on the fixing structure. A clamping cap is provided on the elastic seal. The clamping cap is clamped in the clamping hole to connect the elastic seal to the fixing structure.

7. The check valve according to claim 1, characterized in that, One end of the second flow channel facing the sealing cavity gradually expands towards the sealing cavity to form a conical surface.

8. The one-way valve according to claim 1, characterized in that, The valve body includes a first shell and a second shell connected to each other. The first flow channel is arranged in the first shell. The second flow channel is arranged in the second shell. The sealing cavity is arranged between the first shell and the second shell. The sealing cavity wall is the end wall of the first shell at one end facing the second shell.

9. The one-way valve according to claim 8, wherein, A buckle for connecting to the installation position is provided on the outer wall of the second shell.

10. The one-way valve according to claim 8, characterized in that, An installation flange is provided at one end of the second shell facing the first shell. A sealing gasket is provided at one end of the installation flange away from the first shell. The sealing gasket is used to fit with the installation position.

11. The one-way valve according to any one of claims 1-10, characterized in that, The elastic seal is an elastic diaphragm.

12. An automotive air conditioner, characterized in that, It includes a one-way valve according to any one of claims 1 to 11, and includes a drain pipe. The one-way valve is connected to the drain pipe.

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