Exhaust check valve, compressor and refrigeration equipment

Abstract

The utility model discloses an exhaust check valve, a compressor and refrigeration equipment, and relates to the technical field of compressors. Wherein the exhaust check valve comprises a valve seat and a valve plate, the valve seat is used for being connected with a compression component, the valve seat is provided with a valve cavity, a first port communicated with the valve cavity and a stop wall opposite to the first port, and the first port is communicated with an exhaust port; the valve plate is movably arranged in the valve cavity and used for moving between the stop wall and the first port so as to block or open the first port; at least one of the surface, facing the stop wall, of the valve plate and the stop wall is provided with a pressure relief groove; when the valve plate abuts against the stop wall, the pressure relief groove is communicated with the valve cavity. According to the technical scheme, the check effect of the exhaust check valve can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an exhaust check valve, a compressor and a refrigeration device. Background Art

[0002] In a scroll compressor, the orbiting scroll can move relative to the stationary scroll to achieve the functions of suction, compression and exhaust.

[0003] In the prior art, an exhaust check valve is installed at the exhaust port of the compression chamber to prevent high-pressure gas from flowing back when the compressor is shut down, causing malfunctions. However, due to the extensive oil adhesion between the exhaust valve disc and the valve seat, the valve disc may not return to the original position in time or at all, resulting in a poor check valve effect and causing air flow backflow, which may lead to compressor failure. Utility Model Content

[0004] The main purpose of the utility model is to provide an exhaust check valve, aiming to ensure the check effect of the exhaust check valve.

[0005] To achieve the above-mentioned purpose, the exhaust check valve proposed in the present invention comprises:

[0006] a valve seat for connecting to the compression component, the valve seat being provided with a valve cavity, a first port communicating with the valve cavity, and a stopper wall opposite to the first port, the first port being communicated with the exhaust port; and

[0007] a valve plate movably disposed in the valve cavity and configured to move between the stop wall and the first port to block or open the first port;

[0008] A pressure relief groove is provided on at least one of the surface of the valve plate facing the stop wall and the stop wall; when the valve plate abuts against the stop wall, the pressure relief groove is communicated with the valve cavity.

[0009] In one embodiment of the present application, the stop wall is provided with a second port penetrating both inner and outer surfaces thereof, and the second port is blocked when the valve plate abuts against the stop wall, and a gap is provided between the outer periphery of the valve plate and the edge of the stop wall;

[0010] When the valve plate abuts against the stop wall, the pressure relief groove is communicated with the gap and / or the second port.

[0011] In one embodiment of the present application, the pressure relief groove is provided on the stop wall.

[0012] In one embodiment of the present application, the stopping wall is circular, and the second port is located at the center of the stopping wall.

[0013] In one embodiment of the present application, the pressure relief groove is a strip-shaped groove; the pressure relief groove extends from a position close to the second port toward an edge position of the stop wall.

[0014] In one embodiment of the present application, a plurality of pressure relief grooves are provided, and the plurality of pressure relief grooves are distributed at intervals around the second port.

[0015] In one embodiment of the present application, in the projection on the stop wall, the pressure relief groove is spiral-shaped.

[0016] In one embodiment of the present application, the exhaust check valve also includes a gasket provided at one end of the valve seat away from the stop wall, the gasket is used to be connected to the compression component and cover the exhaust port; the gasket is provided with a vent hole connecting the first port and the exhaust port.

[0017] To achieve the above-mentioned object, the present application also provides a compressor, comprising a compression component and the above-mentioned exhaust check valve;

[0018] The compression component includes an orbiting scroll and a fixed scroll that mesh with each other. The fixed scroll is provided with the exhaust port. The exhaust check valve is installed on the fixed scroll.

[0019] To achieve the above objectives, the present application also provides a refrigeration device, including the above compressor.

[0020] In the exhaust check valve of the present invention, the valve seat is provided with a valve cavity, a first port communicating with the valve cavity, and a stop wall opposite to the first port, the first port being communicated with the exhaust port of the compression component; the valve disc is movably mounted in the valve cavity and can move between the stop wall and the first port to open or block the first port. By providing a pressure relief groove on the surface of the valve disc facing the stop wall and at least one of the stop wall, the pressure relief groove can communicate with the valve cavity when the valve disc and the stop wall are in contact with each other, on the one hand, it can reduce the contact area between the valve disc and the stop wall, and on the other hand, it can provide an oil and gas channel between the valve disc and the stop wall to reduce the pressure difference between the upper and lower parts of the valve disc, so that the valve disc can fall back to block the first port in time, thereby ensuring the check effect of the exhaust check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a structural diagram of an embodiment of an exhaust check valve of the present utility model;

[0023] Figure 2 This is a schematic structural diagram of the valve seat in an embodiment of the present utility model;

[0024] Figure 3 for Figure 2 A top view of an embodiment;

[0025] Figure 4 Schematic diagram of the assembly structure of the exhaust check valve and the fixed scroll in the embodiment of the present utility model;

[0026] Figure 5 for Figure 4 A partial enlarged view of the M in the middle;

[0027] Figure 6 for Figure 4 Top view of an embodiment.

[0028] Description of Figure Numbers:

[0029] Label name Label name 1 Exhaust check valve 105 Pressure relief tank 11 valve seat 106 gap 111 stop wall 12 valve plate 112 Connection 14 gasket 101 Valve cavity 141 vents 102 First Port 2 static scroll 103 air outlet 201 exhaust port 104 Second port

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides an exhaust check valve 1 for use in a compressor. The compressor includes a compression component having an exhaust port 201. The exhaust check valve 1 is installed at the exhaust port 201 to ensure smooth exhaust when the compressor is running and prevent air flow backflow when the compressor is stopped. The exhaust check valve 1 provided in this embodiment is designed to ensure that the valve plate 12 can smoothly return to the exhaust port 201 when the compressor is stopped, thereby improving the performance of the compressor.

[0036] like Figures 1 to 4 As shown, the exhaust check valve 1 includes a valve seat 11 and a valve disc 12. The valve seat 11 is used to connect to the compression component. The valve seat 11 is provided with a valve cavity 101, a first port 102 communicating with the valve cavity 101, and a stop wall 111 opposite the first port 102. The first port 102 is communicated with the exhaust port 201. The valve disc 12 is movably arranged in the valve cavity 101 and is used to move between the stop wall 111 and the first port 102 to block or open the first port 102. The surface of the valve disc 12 facing the stop wall 111 and at least one of the stop wall 111 are provided with a pressure relief groove 105. When the valve disc 12 and the stop wall 111 abut against each other, the pressure relief groove 105 is communicated with the valve cavity 101.

[0037] When the valve seat 11 is installed on the compression component, the valve seat 11 covers the exhaust port 201, and the first port 102 is connected to the exhaust port 201 to connect the valve cavity 101 with the exhaust port 201. The valve disc 12 is movably installed in the valve cavity 101. It can move toward the first port 102 to block the first port 102 and thus close the exhaust port 201. The valve disc 12 can also move away from the first port 102 to open the first port 102 and thus open the exhaust port 201. Specifically, when the compressor is exhausting, the high-pressure gas in the compression component will push the valve disc 12 toward the stop wall 111, opening the first port 102 for smooth exhaust. When the compressor stops, the valve disc 12 falls back toward the first port 102 under the action of its own gravity to block the first port 102 and prevent the backflow of high-pressure air outside the compression component. Optionally, the valve cavity 101 further has an air outlet 103 , and the air flow discharged from the exhaust port 201 can be discharged to the outside of the compression component through the air outlet 103 of the valve cavity 101 . Optionally, the air outlet 103 is provided on a side wall of the valve cavity 101 .

[0038] It should be noted that when the compressor is exhausting, the valve plate 12 will move toward the stop wall 111 under the push of the high-pressure gas until it abuts against it. Since the environment inside the compressor is in an oil-gas mixture state, a vacuum area of ​​oil adhesion will appear between the wall surfaces where the valve plate 12 contacts the stop wall 111. When the compressor stops, the valve plate 12 is not easy to separate from the stop wall 111 due to the action of oil adhesion, and there is a situation where the valve plate 12 does not fall back in time or does not fall back at all. Based on this, this embodiment provides a pressure relief groove 105 on the surface of the valve plate 12 facing the stop wall 111 and / or on the stop wall 111. The pressure relief groove 105 can be connected with the valve cavity 101 when the valve plate 12 and the stop wall 111 are in abutment with each other, so that the oil-gas mixture can flow into between the valve plate 12 and the stop wall 111 through the pressure relief groove 105, reducing the upper and lower pressure difference of the valve plate 12, thereby making it easier for the valve plate 12 to separate from the stop wall 111, and can fall back to block the first port 102 in time to ensure the non-return effect.

[0039] In addition, the provision of the pressure relief groove 105 can also reduce the contact area between the valve plate 12 and the stop wall 111, thereby reducing the oil adhesion force between the two.

[0040] A pressure relief groove 105 is provided on at least one of the surface of the valve disc 12 facing the stop wall 111 and the stop wall 111. It is understood that the pressure relief groove 105 may be provided only on the valve disc 12, only on the stop wall 111, or both on the valve disc 12 and the stop wall 111. The specific shape and structure of the pressure relief groove 105 can be determined based on actual conditions and is not limited here, as long as it ensures that the pressure relief groove 105 is connected to the valve cavity 101 when the valve disc 12 and the stop wall 111 are in contact. Optionally, the fluid flowing within the pressure relief groove 105 may be gas, oil, or an oil-gas mixture.

[0041] In summary, in the exhaust check valve 1 of the technical solution of the present invention, the valve seat 11 is provided with a valve cavity 101, a first port 102 connected to the valve cavity 101, and a stop wall 111 opposite to the first port 102, and the first port 102 is connected to the exhaust port 201 of the compression component; the valve plate 12 is movably installed in the valve cavity 101 and can move between the stop wall 111 and the first port 102 to open or block the first port 102. By arranging a pressure relief groove 105 on the surface of the valve plate 12 facing the stop wall 111 and at least one of the stop wall 111, the pressure relief groove 105 can be connected with the valve cavity 101 when the valve plate 12 and the stop wall 111 are in abutment with each other. On the one hand, it can reduce the contact area between the valve plate 12 and the stop wall 111, and on the other hand, it can provide an oil and gas channel between the valve plate 12 and the stop wall 111 to reduce the upper and lower pressure difference of the valve plate 12, so that the valve plate 12 can fall back to block the first port 102 in time, thereby ensuring the check effect of the exhaust check valve 1.

[0042] In one embodiment of the present application, Figures 1 to 3 The stop wall 111 is provided with a second port 104 running through its inner and outer surfaces. When the valve disc 12 abuts against the stop wall 111, the second port 104 is blocked, and a gap 106 is provided between the outer periphery of the valve disc 12 and the edge of the stop wall 111; when the valve disc 12 abuts against the stop wall 111, the pressure relief groove 105 is communicated with the gap 106 and / or the second port 104.

[0043] In this embodiment, the second port 104 serves as a pressure relief device. When the valve disc 12 is pushed toward the stop wall 111, the airflow above is squeezed out of the second port 104, reducing the resistance to the valve disc 12 and allowing the valve disc 12 to open smoothly until it contacts the stop wall 111. A gap 106 is defined between the outer periphery of the valve disc 12 and the edge of the stop wall 111. As can be appreciated, the valve disc 12 can move smoothly within the valve cavity 101, thereby opening or closing the first port 102.

[0044] It is understood that the manner in which the pressure relief groove 105 communicates with the valve cavity 101 can be determined based on actual circumstances, as long as an oil and gas passage can be provided between the valve plate 12 and the stop wall 111. In this embodiment, the pressure relief groove 105 can be in communication only with the gap 106, or only with the second port 104, or simultaneously with the gap 106 and the second port 104.

[0045] It should be noted that the pressure relief groove 105 in this embodiment can be provided on the stop wall 111 and / or on the valve disc 12. In practical applications, considering the structural strength of the valve disc 12, the pressure relief groove 105 is provided on the stop wall 111. In this way, the structural strength of the valve disc 12 can be ensured to prevent breakage, while being more convenient for production.

[0046] Optionally, the valve seat 11 further includes a connecting portion 112 disposed on the periphery of the stop wall 111. The connecting portion 112 is configured to connect to the compression component. The connecting portion 112 and the stop wall 111 enclose a valve cavity 101. The connecting portion 112 is provided with an air outlet 103 communicating with the valve cavity 101. The valve disc 12 slidably engages with the inner wall of the connecting portion 112. A gap 106 is formed between the periphery of the valve disc 12 and the inner wall of the connecting portion 112.

[0047] Furthermore, if Figures 1 to 3 The stopping wall 111 is circular, and the second port 104 is located at the center of the stopping wall 111 .

[0048] By arranging the second port 104 at the center of the stop wall 111, the valve disc 12 is subjected to more uniform force during its upward movement, further improving the structural reliability of the valve disc 12. Optionally, the valve disc 12 is a circular ring disc.

[0049] In practical applications, the shape and structure of the pressure relief groove 105 can be determined according to actual conditions.

[0050] In one embodiment, if Figures 1 to 3 , the pressure relief groove 105 is a strip-shaped groove; the pressure relief groove 105 extends from a position close to the second port 104 toward the edge of the stop wall 111. In this embodiment, the pressure relief groove 105 is a strip-shaped structure, extending radially along the stop wall 111. Such a design allows the pressure relief groove 105 to span the inner and outer edges of the stop wall 111 as much as possible, further reducing the vacuum area between the stop wall 111 and the valve plate 12, reducing the pressure difference between the upper and lower sides of the valve plate 12, and making it easier for the valve plate 12 to fall back to block the first port 102. Optionally, one end of the pressure relief groove 105 is connected to the second port 104; or, the other end of the pressure relief groove 105 extends to the edge of the stop wall 111 and communicates with the gap 106; or, both ends of the pressure relief groove 105 extend to communicate with the second port 104 and the gap 106 respectively.

[0051] To further enhance the check valve's effectiveness, multiple pressure relief grooves 105 are provided, spaced apart around the second port 104. This further reduces the contact area between the valve plate 12 and the stop wall 111, while increasing the number of oil and gas channels and further reducing oil adhesion. Optionally, there may be two, three, four, or more pressure relief grooves 105.

[0052] In one embodiment, the pressure relief groove 105 is projected onto the stop wall 111 in a spiral shape. In this embodiment, the inner end of the pressure relief groove 105 can be adjacent to or connected to the second port 104, while the outer end of the pressure relief groove 105 can be adjacent to or connected to the edge of the stop wall 111. By providing the pressure relief groove 105 in a spiral shape, the area of ​​the pressure relief groove 105 can be increased, reducing the oil adhesion between the valve disc 12 and the stop wall 111.

[0053] In one embodiment of the present application, Figures 1 to 5 The exhaust check valve 1 also includes a gasket 14 provided at one end of the valve seat 11 away from the stop wall 111. The gasket 14 is used to connect with the compression component and cover the exhaust port 201. The gasket 14 is provided with a vent hole 141 connecting the first port 102 and the exhaust port 201.

[0054] In this embodiment, the gasket 14 is adapted to fit the valve disc 12 , so that the valve disc 12 can fit tightly on the gasket 14 , thereby ensuring that the valve disc 12 can stably close the vent hole 141 and thus close the first port 102 .

[0055] It is understandable that when the valve plate 12 is directly attached to the compression component, the valve plate 12 and the compression component may not fit tightly. Therefore, in order to ensure the sealing of the exhaust port 201, a separate gasket 14 can be provided to cover the exhaust port 201 for cooperation with the valve plate 12.

[0056] During installation, the gasket 14 is sandwiched between the connecting portion 112 and the compression component, and the connecting portion 112 and the gasket 14 are fixed to the compression component by screw locking.

[0057] The utility model also proposes a compressor, such as Figures 4 to 6 The compressor includes a compression component and an exhaust check valve 1. The specific structure of the exhaust check valve 1 is similar to that of the above-mentioned embodiments. Since the present compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and no further details are given here. The compression component includes an intermeshing orbiting scroll and a fixed scroll 2. The fixed scroll 2 is provided with an exhaust port 201. The exhaust check valve 1 is installed at the exhaust port 201 of the fixed scroll 2, which can effectively prevent the backflow of high-pressure fluid into the scroll compressor, thereby avoiding the problem of difficulty in starting the compressor when restarting after a short period of time.

[0058] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above embodiment. Since the present refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0059] Optionally, the refrigeration equipment may be an air conditioner, a refrigerator, or cold chain transportation equipment, etc.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An exhaust check valve, characterized in that: Applicable to a compressor, the compressor includes a compression component, the compression component has an exhaust port; the exhaust check valve includes: a valve seat for connecting to the compression component, the valve seat being provided with a valve cavity, a first port communicating with the valve cavity, and a stopper wall opposite to the first port, the first port being communicated with the exhaust port; and a valve plate movably disposed in the valve cavity and configured to move between the stop wall and the first port to block or open the first port; A pressure relief groove is provided on at least one of the surface of the valve plate facing the stop wall and the stop wall; when the valve plate abuts against the stop wall, the pressure relief groove is communicated with the valve cavity.

2. The exhaust check valve according to claim 1, characterized in that: The stop wall is provided with a second port penetrating the inner and outer surfaces thereof, and the second port is blocked when the valve plate abuts against the stop wall, and a gap is formed between the outer periphery of the valve plate and the edge of the stop wall; When the valve plate abuts against the stop wall, the pressure relief groove is communicated with the gap and / or the second port.

3. The exhaust check valve according to claim 2, characterized in that: The pressure relief groove is arranged on the stop wall.

4. The exhaust check valve according to claim 3, characterized in that: The stopping wall is circular, and the second port is located at the center of the stopping wall.

5. The exhaust check valve according to claim 4, characterized in that: The pressure relief groove is a strip-shaped groove; the pressure relief groove extends from a position close to the second port toward an edge position of the stop wall.

6. The exhaust check valve according to claim 5, characterized in that: There are a plurality of pressure relief grooves, and the plurality of pressure relief grooves are distributed at intervals around the second port.

7. The exhaust check valve according to claim 4, characterized in that: In the projection on the stop wall, the pressure relief groove is spiral-shaped.

8. The exhaust check valve according to any one of claims 1 to 7, characterized in that: The exhaust check valve also includes a gasket provided at one end of the valve seat away from the stop wall, the gasket is used to be connected to the compression component and cover the exhaust port; the gasket is provided with a vent hole connecting the first port and the exhaust port.

9. A compressor, characterized in that: comprising a compression component and an exhaust check valve according to any one of claims 1 to 8; The compression component includes an orbiting scroll and a fixed scroll that mesh with each other. The fixed scroll is provided with the exhaust port. The exhaust check valve is installed on the fixed scroll.

10. A refrigeration device, characterized in that: Comprising the compressor of claim 9.

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