WO2024037253A1 - Exhaust check valve assembly, scroll compressor, and air conditioning system - Google Patents

Abstract

The present application discloses an exhaust check valve assembly, a scroll compressor, and an air conditioning system. The exhaust check valve assembly comprises: a valve seat provided with a first port, a second port, and a valve cavity enabling the first port to be communicated with the second port; a cover plate disposed at the first port, the cover plate being provided with hollowed-out holes passing through two sides of the cover plate; and a valve core slidably disposed in the valve cavity so as to open or close an exhaust channel between the hollowed-out holes and the second port. The valve core comprises a valve plate and a first cylindrical surface body, the valve plate and the cover plate are disposed opposite to each other, the valve plate is provided with a through hole passing through two sides of the valve plate, the first cylindrical surface body extends from the outer peripheral edge of the valve plate in an axial direction, and the outer peripheral surface of the first cylindrical surface body is in sliding fit with the inner peripheral surface of the valve seat.

Description

Exhaust check valve assemblies, scroll compressors and air conditioning systems

Cross-references to related applications

This application is based on a Chinese patent application with application number: CN202222156303.5, the filing date is August 15, 2022, and the application name is "Exhaust Check Valve Assembly, Scroll Compressor and Air Conditioning System", and requires that the Chinese Priority of the patent application, the entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

The present application relates to the field of compressor technology, and in particular to an exhaust check valve assembly, a scroll compressor and an air conditioning system.

Background technique

Low-pressure cavity scroll compressors usually include a moving scroll and a fixed scroll used to compress the working fluid. During normal operation, the refrigerant enters the casing through the suction pipe, and then is compressed by the pump body and discharged from the upper casing, entering the air conditioning system. , forming a cycle. When the compressor is used in the system, if it is shut down in an emergency, high-pressure refrigerant will be poured back into the compressor, and restarting the compressor within a short period of time will cause serious risks due to the large pressure difference. Scroll compressors usually have a discharge check valve assembly, which can effectively prevent high-pressure gas from flowing back. However, the related exhaust check valve components all use simple one-way valve discs to achieve the check function. Under the impact of large pressure differences during shutdown, the one-way valve discs have the hidden danger of getting stuck or poor sealing, and their reliability is poor. .

Contents of the invention

The main purpose of this application is to propose an exhaust check valve assembly aimed at solving at least one of the above problems.

In order to achieve the above purpose, the exhaust check valve assembly proposed in this application includes:

A valve seat provided with a first port, a second port, and a valve cavity connecting the first port and the second port;

A cover plate is provided at the first port, and the cover plate is provided with hollow holes penetrating both sides; and

A valve core is slidably disposed in the valve cavity to connect or block the exhaust passage between the hollow hole and the second port; the valve core includes a valve plate and a first cylindrical body, The valve plate is arranged opposite to the cover plate. The valve plate is provided with through holes penetrating both sides. The first cylindrical body extends axially from the outer peripheral edge of the valve plate. The first column The outer peripheral surface of the surface body is in sliding fit with the inner peripheral surface of the valve seat.

In one embodiment, the outer peripheral surface of the first cylindrical body and/or the inner peripheral surface of the valve seat is provided with a high-hardness wear-resistant layer.

In one embodiment, the high-hardness wear-resistant layer is formed on the outer peripheral surface of the first cylindrical body and/or the inner peripheral surface of the valve seat through a heat treatment process.

In one embodiment, the valve plate is arranged in an annular shape, the inner periphery of the valve plate surrounds the through hole, and the valve core further includes a second cylindrical body located on the inner periphery of the valve plate, The second cylindrical body and the first cylindrical body both extend from the valve plate toward the cover plate, and both the first cylindrical body and the second cylindrical body have an annular shape opposite to the valve plate. End face, when the valve core is in a position to block the exhaust channel, the annular end face abuts the cover plate, and the projection of the valve plate on the cover plate covers the hollow hole.

In one embodiment, the width D of the annular end surface is greater than or equal to 1 mm.

In one embodiment, there are multiple hollow holes, and the plurality of hollow holes are spaced and evenly arranged along the circumferential direction of the cover plate.

In one embodiment, the area S1 of the through hole is greater than or equal to the total area S2 of all the hollow holes on the cover plate.

In one embodiment, the cover plate is placed in the first port, and the cover plate is interference-fitted or riveted-fitted with the first port.

In one embodiment, the exhaust check valve assembly further includes an exhaust pipe connected to the second port.

This application also proposes a scroll compressor, including:

The upper shell is equipped with an exhaust port;

A partition plate is provided in the upper casing. The partition plate divides the inner cavity of the upper casing into a first cavity and a second cavity. The partition plate is provided with the first cavity. a communication port through which the cavity communicates with the second cavity, and the second cavity communicates with the exhaust port; and

As mentioned above, the exhaust check valve assembly is installed on the exhaust port.

This application also proposes an air conditioning system, including the scroll compressor as mentioned above.

Description of drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic cross-sectional structural diagram of an embodiment of the exhaust check valve assembly of the present application;

Figure 2 is a schematic cross-sectional structural view of the exhaust check valve assembly in Figure 1 in another state;

Figure 3 is a schematic structural diagram of the valve core of the exhaust check valve assembly in Figure 1;

Figure 4 is a schematic structural diagram of the valve core in Figure 3 from another perspective;

Figure 5 is a schematic cross-sectional structural view of the valve core in Figure 3;

Figure 6 is a schematic structural view of the cover plate of the exhaust check valve assembly in Figure 1;

Figure 7 is a partial cross-sectional structural diagram of an embodiment of the scroll compressor of the present application.

Explanation of reference numbers:

label	name	label	name
11	valve seat	133	second cylinder
101	Valve cavity	1331	Annular end face
12	Cover plate	14	exhaust pipe
121	Hollow hole	20	upper shell
13	valve core	30	Partition plate
131	Valve plate	31	first cavity
1311	Through hole	32	Second cavity
132	first cylinder	33	connecting port

The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of this application, the directional indications are only used to explain the relationship between the components in a specific posture. The relative position relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, or solution B, or solution A and A solution that satisfies B at the same time. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

This application proposes an exhaust check valve assembly.

Illustratively, the exhaust check valve assembly may be applied to a scroll compressor. The scroll compressor includes a casing. A main frame and a drive motor are fixed inside the casing. The drive motor is drivingly connected to the crankshaft. The upper end of the crankshaft is connected to a movable scroll. The main frame is fixed with a static scroll opposite to the movable scroll. The static scroll is fixed to the main frame. The scroll and the movable scroll cooperate to form multiple compression chambers. When the scroll compressor is working, the drive motor drives the crankshaft to rotate, which in turn drives the movable scroll to rotate relative to the fixed scroll to achieve the suction, compression and discharge of refrigerant. As shown in Figure 7, an upper housing 20 is provided on the top of the housing, and a partition plate 30 is provided inside the upper housing 20. The partition plate 30 divides the inner cavity of the upper housing 20 into a first cavity 31 and a third cavity. There are two cavities 32. The partition plate 30 is provided with a communication port 33 that connects the first cavity 31 and the second cavity 32. The second cavity 32 is connected with the exhaust port; the exhaust check valve assembly is installed on the exhaust port. mouth. When a scroll compressor is used in an air conditioning system, the refrigerant in the scroll compressor is compressed and discharged into the second chamber through the first chamber and the communication port 33, and then discharged into the air conditioning system through the exhaust check valve assembly, forming a cycle. The specific implementation of the exhaust check valve assembly will be described in detail below.

Please refer to FIGS. 1 to 3 . In an embodiment of the present application, the exhaust check valve assembly includes a valve seat 11 , a cover plate 12 and a valve core 13 . The valve seat 11 is provided with a first port, a second port, and a valve chamber 101 connecting the first port and the second port; the cover plate 12 is provided at the first port, and the cover plate 12 is provided with hollow holes 121 penetrating both sides; The valve core 13 is slidably disposed in the valve cavity 101 to connect or block the exhaust channel between the hollow hole 121 and the second port; the valve core 13 includes a valve plate 131 and a first cylindrical body 132. The valve plate 131 Set opposite the cover plate 12 , the valve plate 131 is provided with through holes 1311 penetrating both sides. The first cylindrical body 132 extends axially from the outer peripheral edge of the valve plate 131 . The outer peripheral surface of the first cylindrical body 132 is in contact with the valve seat 11 The inner circumferential surface has a sliding fit.

For example, the valve seat 11 has a hollow columnar structure, and a valve chamber 101 is formed inside it. The valve chamber 101 can be configured as a cylindrical cavity. Opposite sides of the valve seat 11 are respectively provided with a first port and a second port communicating with the valve chamber 101 . For example, in this embodiment, the valve seat 11 includes an end plate and a side wall plate extending toward one side from the outer periphery of the end plate. The end plate and the side wall plate enclose to form the valve cavity 101, and the side wall plate is away from the end plate. One end of the end plate forms a first port, and the center of the end plate is provided with a second port. The cover plate 12 covers the first port of the valve seat 11, and the shape of the cover plate 12 matches the shape of the first port. For example, the first port is configured in a circular shape, and the cover plate 12 is a circular plate adapted to the first port. The cover plate 12 is provided with a hollow hole 121 , and the hollow hole 121 penetrates through the opposite sides of the cover plate 12 along the thickness direction of the cover plate 12 . The number of hollow holes 121 can be set according to actual needs, for example, it can be one, two or more. The shape of the hollow hole 121 can be set according to actual needs, for example, it can be a circle, an ellipse, a waist circle, a square, a polygon, etc. The valve core 13 is slidably disposed in the valve chamber 101 , and the sliding stroke of the valve core 13 can be limited by the cover plate 12 and the end plate of the valve seat 11 . The valve core 13 includes a valve plate 131 arranged opposite to the cover plate 12 , and a first cylindrical body 132 extending in the axial direction from the outer peripheral edge of the valve plate 131 . Among them, the valve plate 131 is provided with through holes 1311, which penetrate through the opposite sides of the valve plate 131 along the thickness direction of the valve plate 131. The number and shape of the through holes 1311 can be set according to actual needs, and will not be detailed here. limited. The first cylindrical body 132 may extend from the valve plate 131 toward the side of the cover plate 12 , or may extend from the valve plate 131 toward the side away from the cover plate 12 , which is not specifically limited here. The outer peripheral surface of the first cylindrical body 132 matches the shape of the inner peripheral surface of the valve seat 11 and can slide with each other.

The technical solution of the present application optimizes the structure of the valve core 13. A first cylindrical body 132 is provided on the outer periphery of the valve plate 131 of the valve core 13. The first cylindrical body 132 extends along the axial direction of the valve plate 131. The outer circumferential surface of the first cylindrical body 132 is slidably matched with the inner circumferential surface of the valve seat 11, so that there is a larger sliding mating area between the valve core 13 and the valve seat 11. Compared with the traditional technology where only a thin film is provided in the valve seat. For the one-way valve piece, the sliding mating area between the valve core 13 and the valve seat 11 in this technical solution is larger, which can form a piston-like sliding structure, so that the valve core 13 can move in the valve chamber 101 along the direction of the fluid. The internal stable sliding can effectively reduce the risk of jamming and improve the reliability of the exhaust check valve assembly, which can effectively improve the reliability of the scroll compressor.

For example, as shown in Figure 7, when the exhaust check valve assembly is applied to a scroll compressor, the exhaust check valve assembly can be installed at the exhaust port of the scroll compressor through the valve seat 11, where The cover plate 12 is located on the side of the valve core 13 close to the second cavity 32 . When the scroll compressor is operating normally, the direction of the fluid is as shown by the arrow in Figure 1, and the valve core 13 slides to the first position separated from the cover plate 12 under the action of the pressure difference. At this time, the gap between the hollow hole 121 and the second port The exhaust channel between the two is connected, so that the high-pressure fluid in the scroll compressor can enter the exhaust channel through the hollow hole 121 and then be discharged through the through hole 1311 and the first port, and enter the air conditioning system circulation. When the scroll compressor is shut down, the high-pressure fluid in the air conditioning system will pour back into the scroll compressor. The direction of the fluid is as shown by the arrow in Figure 2. The valve core 13 slides to the third position in contact with the cover plate 12 under the action of the pressure difference. In the second position, at this time, the valve core 13 can block the hollow hole 121 of the cover plate 12 to block the exhaust passage, effectively preventing high-pressure fluid from pouring back into the scroll compressor, and preventing the compressor from being difficult to start again in a short time. Startup problem.

When the valve core 13 slides in the valve cavity 101, the outer peripheral surface of the first cylindrical body 132 slides with the inner peripheral surface of the valve seat 11. In order to reduce the wear between the two sliding parts and improve the service life, one of the implementations In this example, a high-hardness wear-resistant layer is provided on the outer peripheral surface of the first cylindrical body 132 and/or the inner peripheral surface of the valve seat 11 . For example, the outer peripheral surface of the first cylindrical body 132 can form a high-hardness wear-resistant layer through a special surface heat treatment process. The inner peripheral surface of the valve seat 11 can form a high-hardness wear-resistant layer through a special surface heat treatment process. For example, a high-hardness wear-resistant layer can be formed on the outer peripheral surface of the first cylindrical body 132 and/or the inner peripheral surface of the valve seat 11 through a heat treatment process such as nitriding and carbonitriding. Of course, in other embodiments, a high-hardness wear-resistant layer may also be formed on the outer peripheral surface of the first cylindrical body 132 and/or the inner peripheral surface of the valve seat 11 by electroplating or surface spraying.

Please refer to FIGS. 2 and 3 . In one embodiment, the valve plate 131 is arranged in an annular shape, and the inner periphery of the valve plate 131 is enclosed to form a through hole 1311 . The valve core 13 also includes a second hole disposed on the inner periphery of the valve plate 131 . The cylindrical body 133, the second cylindrical body 133 and the first cylindrical body 132 all extend from the valve plate 131 toward the cover plate 12. The first cylindrical body 132 and the second cylindrical body 133 each have an annular end surface 1331 opposite to the valve plate 131. When the valve core 13 is in a position to block the exhaust passage, the annular end surface 1331 is in contact with the cover plate 12 , and the projection of the valve plate 131 on the cover plate 12 covers the hollow hole 121 .

For example, when the valve core 13 is in the position of blocking the exhaust passage, the annular end surfaces 1331 of the first cylindrical body 132 and the second cylindrical body 133 are both in contact with the cover plate 12 , and the valve plate 131 is on the cover plate 12 The projection covers the hollow hole 121. At this time, the first cylindrical body 132, the valve plate 131 and the second cylindrical body 133 cooperate to block the hollow hole 121 of the cover plate 12 to prevent high-pressure fluid from flowing through the hollow hole 121 of the cover plate 12. Pour back into the scroll compressor. In this embodiment, the valve core 13 is in contact with the cover plate 12 through two annular end surfaces 1331. Compared with the large plane contact between the one-way valve plate and the cover plate in the traditional technology, the valve core 13 in this technical solution The contact area between the valve core 13 and the cover plate 12 is smaller, and the pressure per unit area of the valve core 13 is greater, so that the valve core 13 and the cover plate 12 can fit more closely, thereby further ensuring that the valve core 13 and the cover The sealing reliability between the plates 12 can effectively prevent the high-pressure fluid from entering the scroll compressor from reverse flow.

In order to facilitate production and manufacture while ensuring structural strength, the width of the annular end surface 1331 of the first cylindrical body 132 and the second cylindrical body 133 cannot be too small. As shown in FIG. 5 , in one embodiment, the width D of the annular end surface 1331 is greater than or equal to 1 mm. For example, the width D of the annular end surface 1331 refers to the difference between the outer diameter dimension of the annular end surface 1331 and the inner diameter dimension of the annular end surface 1331 .

In one embodiment, multiple hollow holes 121 are provided, and the plurality of hollow holes 121 are spaced and evenly arranged along the circumferential direction of the cover plate 12 . By providing multiple hollow holes 121, the fluid flux can be increased and the exhaust efficiency can be improved. In addition, the plurality of hollow holes 121 are spaced and evenly arranged along the circumferential direction of the cover plate 12, so that the fluid can exert a uniform force on the valve core 13 after passing through the hollow holes 121, so that the force on the valve core 13 is more balanced, and the valve core 13 can be prevented from slipping. The deflection of the core 13 can further ensure the sliding stability of the valve core 13 and further prevent the valve core 13 from getting stuck. For example, as shown in FIG. 6 , three hollow holes 121 are provided. The three hollow holes 121 are spaced and evenly arranged along the circumferential direction of the cover plate 12 . The hollow holes 121 may be arranged in a waist-shaped shape.

When the scroll compressor is working, the high-pressure fluid discharged from the scroll compressor enters the exhaust passage through the hollow hole 121, and then passes through the through hole 1311 of the valve core 13 and is discharged from the first port. In order to prevent the valve core 13 from passing through the hollow hole, The fluid entering 121 produces a intercepting effect to ensure fluid flux. As shown in Figures 4 and 6, in one embodiment, the area S1 of the through hole 1311 is greater than or equal to the total area S2 of all the hollow holes 121 on the cover plate 12 . For example, in this embodiment, the cover 12 is provided with three hollow holes 121, then the sum of the areas of the three hollow holes 121 is S2, and the area S1 of the through hole 1311 is greater than or equal to S2. In order to further improve the fluid flux, optionally, the area S1 of the through hole 1311 is larger than the total area S2 of all the hollow holes 121 on the cover plate 12 .

There are many ways to assemble the cover plate 12 and the valve seat 11. In one embodiment, the cover plate 12 is placed in the first port, and the cover plate 12 is an interference fit or riveted fit with the first port. The assembly structure is simple, and Assembly reliability can be guaranteed. For example, as shown in Figure 1, in this embodiment, a groove is provided on the inner periphery of the end surface of the first port. The groove has a stepped surface opposite to the end surface of the first port, and the cover plate 12 is accommodated in the groove. One side of the cover plate 12 is in contact with the step surface, and the outer peripheral surface of the cover plate 12 is in interference fit or riveted fit with the inner peripheral surface of the groove.

In one embodiment, the exhaust check valve assembly further includes an exhaust pipe 14 coupled to the second port. For example, one end of the exhaust pipe 14 is connected to the second port, and the other end can be connected to the pipeline of the air conditioning system, so that the high-pressure fluid discharged from the scroll compressor can enter the air conditioning system through the exhaust pipe 14 . In order to facilitate the installation of the exhaust pipe 14 , optionally, the valve seat 11 is provided with a pipe end extending toward the side away from the first port on the periphery of the valve seat 11 corresponding to the second port, and the pipe end is sleeved on the periphery of the exhaust pipe 14 .

As shown in FIG. 7 , this application also proposes a scroll compressor, which includes an upper housing 20 , a partition plate 30 and an exhaust check valve assembly. The upper housing 20 is provided with an exhaust port; a partition plate 30 is provided in the upper housing 20, and the partition plate 30 divides the inner cavity of the upper housing 20 into a first cavity 31 and a second cavity 32. The plate 30 is provided with a communication port 33 that communicates the first cavity 31 with the second cavity 32. The second cavity 32 is connected with the exhaust port; the exhaust check valve assembly is installed at the exhaust port. The specific structure of the exhaust check valve assembly refers to the above-mentioned embodiments. Since this scroll compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. This will not be repeated one by one.

For example, a scroll compressor includes a casing, a main frame and a drive motor are fixed inside the casing, the drive motor is drivingly connected to a crankshaft, an movable scroll is connected to the upper end of the crankshaft, and a stationary scroll opposite to the movable scroll is fixed to the main frame. The scroll, fixed scroll and movable scroll cooperate to form multiple compression chambers. When the scroll compressor is working, the drive motor drives the crankshaft to rotate, which in turn drives the movable scroll to rotate relative to the fixed scroll to achieve the suction, compression and discharge of refrigerant. Among them, an upper shell 20 is provided on the top of the shell, and a partition plate 30 is provided above the fixed scroll in the upper shell 20. The partition plate 30 divides the inner cavity of the upper shell 20 into a first cavity 31. and the second cavity 32. The partition plate 30 is provided with a communication port 33 that communicates the first cavity 31 with the second cavity 32. The second cavity 32 is connected with the exhaust port; the exhaust check valve assembly passes through the valve The seat 11 is installed at the exhaust port, and the cover plate 12 is located on the side of the valve core 13 close to the second cavity 32 . When a scroll compressor is used in an air conditioning system, the refrigerant in the scroll compressor is compressed and discharged into the second chamber through the first chamber and the communication port 33, and then discharged into the air conditioning system through the exhaust check valve assembly, forming a cycle. The exhaust check valve assembly can effectively prevent high-pressure fluid from pouring back into the scroll compressor, which can avoid the problem of difficulty in starting the compressor when it is restarted in a short time. Moreover, the valve core 13 of the exhaust check valve assembly slides smoothly without getting stuck, which can effectively improve the reliability of the compressor.

This application also proposes an air-conditioning system, which includes a scroll compressor. The specific structure of the scroll compressor refers to the above-mentioned embodiments. Since this air-conditioning system adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned features. All beneficial effects brought by the technical solutions of the embodiments will not be repeated here.

The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Under the inventive concept of the present application, equivalent structural transformations made by using the contents of the description and drawings of the present application, or direct/indirect application Other related technical fields are included in the patent protection scope of this application.

Claims (11)

1. An exhaust check valve assembly, which includes:

   A valve seat provided with a first port, a second port, and a valve cavity connecting the first port and the second port;

   A cover plate is provided at the first port, and the cover plate is provided with hollow holes penetrating both sides; and

   A valve core is slidably disposed in the valve cavity to connect or block the exhaust passage between the hollow hole and the second port; the valve core includes a valve plate and a first cylindrical body, The valve plate is arranged opposite to the cover plate. The valve plate is provided with through holes penetrating both sides. The first cylindrical body extends axially from the outer peripheral edge of the valve plate. The first column The outer peripheral surface of the surface body is in sliding fit with the inner peripheral surface of the valve seat.
2. The exhaust check valve assembly according to claim 1, wherein the outer peripheral surface of the first cylindrical body and/or the inner peripheral surface of the valve seat is provided with a high-hardness wear-resistant layer.
3. The exhaust check valve assembly according to claim 2, wherein the high-hardness wear-resistant layer is formed on the outer peripheral surface of the first cylindrical body and/or the inner peripheral surface of the valve seat through a heat treatment process.
4. The exhaust check valve assembly according to any one of claims 1 to 3, wherein the valve plate is arranged in an annular shape, the inner periphery of the valve plate surrounds the through hole, and the valve core further It includes a second cylindrical body located on the inner periphery of the valve plate. Both the second cylindrical body and the first cylindrical body extend from the valve plate toward the cover plate. The first cylindrical body and the first cylindrical body The second cylindrical bodies each have an annular end surface opposite to the valve plate. When the valve core is in a position to block the exhaust passage, the annular end surface abuts the cover plate, and the valve plate The projection on the cover plate covers the hollow hole.
5. The exhaust check valve assembly according to claim 4, wherein the width D of the annular end surface is greater than or equal to 1 mm.
6. The exhaust check valve assembly according to any one of claims 1 to 5, wherein there are a plurality of hollow holes, and the plurality of hollow holes are spaced and evenly arranged along the circumferential direction of the cover plate. .
7. The exhaust check valve assembly according to any one of claims 1 to 6, wherein the area S1 of the through hole is greater than or equal to the total area S2 of all the hollow holes on the cover plate.
8. The exhaust check valve assembly according to any one of claims 1 to 7, wherein the cover plate is placed in the first port, and the cover plate is interference fit or riveted with the first port. Cooperate.
9. The exhaust check valve assembly according to any one of claims 1 to 8, further comprising an exhaust pipe docked with the second port.
10. A scroll compressor, including:

    The upper shell is equipped with an exhaust port;

    A partition plate is provided in the upper casing. The partition plate divides the inner cavity of the upper casing into a first cavity and a second cavity. The partition plate is provided with the first cavity. a communication port through which the cavity communicates with the second cavity, and the second cavity communicates with the exhaust port; and

    The exhaust check valve assembly according to any one of claims 1 to 9 is installed on the exhaust port.
11. An air conditioning system, comprising the scroll compressor according to claim 10.