Exhaust non-return device and scroll compressor

Abstract

The embodiment of the invention provides an exhaust non-return device and a scroll compressor, the exhaust non-return device comprises a fan blade assembly, the fan blade assembly is arranged in an exhaust port, one end of the fan blade assembly is connected to a movable scroll plate, and the movable scroll plate rotates to drive the fan blade assembly to rotate. According to the scroll compressor, the fan blade assembly is arranged in the exhaust port of the static scroll plate, the rotation of the movable scroll plate is utilized to drive the fan blade assembly to rotate, when gas generated in the operation process of the scroll compressor is exhausted through the exhaust port, the rotating fan blade assembly can accelerate gas exhaust and reduce exhaust resistance, and when the gas has a backflow trend, the fan blade assembly is prevented from rotating. The fan blade assembly can play a blocking role, and the non-return function is achieved. Compared with a traditional exhaust non-return structure, the exhaust non-return device is simple in structure, stable in non-return effect and capable of assisting exhaust and improving the exhaust efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly relates to an exhaust check valve device and a scroll compressor. Background Art

[0002] A scroll compressor is a positive displacement compressor that relies on the relative movement of a moving scroll and a stationary scroll to cause a closed volume to change periodically to achieve gas compression. Scroll compressors have the advantages of high efficiency, small size, and stable operation, and are widely used in systems such as air conditioners and heat pumps.

[0003] During the operation of a scroll compressor, the exhaust check valve function is of great significance for ensuring the normal operation of the scroll compressor and preventing gas backflow. In traditional compressor structures, an exhaust check valve seat and a check valve disc are usually provided at the exhaust port of the stationary scroll, and the reciprocating movement of the check valve disc is achieved by means of pressure difference to achieve the effect of exhaust check. Among them, the check valve seat is used to limit the check valve disc. Due to the uneven air flow during exhaust, the check valve disc will tilt when moving up or down, resulting in component wear. In addition, there is a large loss of exhaust resistance in achieving opening and closing through pressure difference. Summary of the Invention

[0004] The present invention provides an exhaust check valve device and a scroll compressor, aiming to solve the problem of large exhaust resistance in the exhaust check valve structure of the existing scroll compressor that realizes the exhaust check valve function by means of pressure difference.

[0005] An embodiment of the present invention provides an exhaust check valve device applied to a scroll compressor. The scroll compressor includes a stationary scroll and a moving scroll connected in sequence axially. The stationary scroll has an exhaust port. The exhaust check valve device includes a blade assembly disposed in the exhaust port. One end of the blade assembly is connected to the moving scroll, and the rotation of the moving scroll can drive the blade assembly to rotate self.

[0006] Specifically, the blade assembly includes a blade and a connecting member. One end of the connecting member is connected to the blade, and the other end of the connecting member is connected to the moving scroll.

[0007] Specifically, the connecting member includes a connecting member body and a first connection point and a second connection point disposed at both ends of the connecting member body. The blade is connected to the first connection point, and the moving scroll is connected to the second connection point. The first connection point is located at the rotation center of the moving scroll.

[0008] Specifically, the first connection point includes a first connection hole, the second connection point includes a second connection hole, the impeller includes an impeller body and a first connection column connected to the impeller body, the first connection column is connected to the first connection hole, a second connection column is arranged on one side of the moving scroll plate facing the stationary scroll plate, and the second connection column is connected to the second connection hole.

[0009] Specifically, the impeller assembly further includes a fixing member installed in the exhaust port, a through hole is provided in the middle of the fixing member, and the first connection column passes through the through hole and is connected to the first connection hole.

[0010] Specifically, a limiting member extends towards the side at one end of the first connection column, a limiting hole communicating with the second connection hole is provided on the side of the first connection hole, and the limiting member is limited in the limiting hole.

[0011] Specifically, the exhaust port includes an exhaust hole and a sunk groove, the sunk groove is arranged on one side of the stationary scroll plate close to the end face relative to the exhaust hole, and the impeller assembly is located in the sunk groove.

[0012] Specifically, the rotational outer diameter of the impeller is less than or equal to the diameter of the sunk groove.

[0013] Specifically, the top of the impeller is higher than the sunk groove.

[0014] An embodiment of the present invention further provides a scroll compressor, including a stationary scroll plate and a moving scroll plate connected in sequence axially, the stationary scroll plate has an exhaust port, and further includes the exhaust check device as described above.

[0015] An embodiment of the present invention provides an exhaust check device and a scroll compressor. The exhaust check device includes an impeller assembly. The impeller assembly is arranged in the exhaust port. One end of the impeller assembly is connected to the moving scroll plate, and the rotation of the moving scroll plate can drive the impeller assembly to rotate self - identically. In this embodiment, the impeller assembly is arranged in the exhaust port of the stationary scroll plate, and the rotation of the moving scroll plate is used to drive the impeller assembly to rotate self - identically. When the gas generated during the operation of the scroll compressor is discharged through the exhaust port, the rotating impeller assembly can accelerate the gas discharge, reduce the exhaust resistance, and when the gas has a reverse flow tendency, the impeller assembly can play a blocking role to achieve the check function. Compared with the traditional exhaust check structure, this device has a simple structure, a stable check effect, and can assist in exhaust and improve the exhaust efficiency at the same time. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of an exhaust check valve device provided by an embodiment of the present invention;

[0018] Figure 2 Structural schematic diagram of a scroll compressor provided by an embodiment of the present invention;

[0019] Figure 3 Internal structural schematic diagram of a scroll compressor provided by an embodiment of the present invention;

[0020] Figure 4 Structural schematic diagram of a connecting piece;

[0021] Figure 5 Structural schematic diagram of a wind blade;

[0022] Figure 6 Structural schematic diagram of a fixing piece;

[0023] Figure 7 Schematic diagram of air flow during the operation of a scroll compressor provided by an embodiment of the present invention;

[0024] Figure 8 Schematic diagram of the rotation direction of a scroll compressor provided by an embodiment of the present invention;

[0025] Figure 9 For Figure 8 Enlarged view of structure A in

[0026] Figure 10 Schematic diagram of the simulation result of the oil separation process of a scroll compressor.

[0027] Explanation of the markings in the figure:

[0028] 1. Wind blade assembly; 11. Wind blade; 111. Wind blade body; 112. First connecting column; 113. Limiting piece; 12. Connecting piece; 121. Connecting piece body; 122. First connection point; 1221. First connection hole; 1222. Limiting hole; 123. Second connection point; 1231. Second connection hole; 13. Fixing piece; 131. Through hole;

[0029] 2. Moving scroll disk; 21. Second connecting column;

[0030] 3. Static scroll disk; 31. Exhaust port; 311. Exhaust hole; 312. Sunk groove;

[0031] 4. Upper bracket

[0032] 5. Upper cover Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0035] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0036] It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] Please refer to Figures 1-3 , an exhaust check device is provided in an embodiment of the present invention, which is applied to a scroll compressor. The scroll compressor includes a stationary scroll plate 3 and a moving scroll plate 2 connected in sequence in the axial direction. The stationary scroll plate 3 has an exhaust port 31. The exhaust check device includes a blade assembly 1. The blade assembly 1 is disposed in the exhaust port 31. One end of the blade assembly 1 is connected to the moving scroll plate 2, and the rotation of the moving scroll plate 2 can drive the blade assembly 1 to rotate self - sufficiently.

[0038] In this embodiment, the impeller assembly 1 is disposed in the exhaust port 31, and the rotation of the moving scroll disk 2 drives the impeller assembly 1 to rotate. When the gas generated during the operation of the scroll compressor is discharged through the exhaust port 31, the rotating impeller assembly 1 can assist the gas to be discharged smoothly, and when the gas has a tendency to flow back, the impeller assembly 1 can play a blocking role to achieve the check valve function. The working process of the entire exhaust check valve device is as follows: When the scroll compressor works, the moving scroll disk 2 starts to rotate, and drives the impeller assembly 1 to rotate through the connection with the impeller assembly 1. When the impeller assembly 1 rotates, it will generate a suction force from the inside to the outside, so that the scroll compressor can assist in exhausting gas during exhaust. When the gas is discharged from the exhaust port 31, the rotation of the impeller assembly 1 can accelerate the gas discharge, reduce the exhaust resistance, increase the exhaust rate, and improve the performance of the scroll compressor; at the same time, because the impeller assembly 1 is driven by the movement of the moving scroll disk 2, the impeller assembly 1 will continue to rotate during the operation of the scroll compressor. The continuous outward air extraction during the operation of the impeller assembly 1 will generate an air flow cover outside the exhaust port 31 of the stationary scroll disk 3, so that the discharged gas will no longer flow back into the scroll compressor, playing the function of exhaust check valve. Compared with the traditional exhaust check valve structure, this device has a simple structure, a stable check valve effect, can assist in exhausting gas at the same time, improve the exhaust efficiency, and reduce the energy loss.

[0039] Specifically, as Figure 1 and Figure 3 shown, the impeller assembly 1 includes an impeller 11 and a connecting member 12. One end of the connecting member 12 is connected to the impeller 11, and the other end of the connecting member 12 is connected to the moving scroll disk 2.

[0040] In this embodiment, the impeller 11 and the moving scroll disk 2 are stably connected through the connecting member 12, ensuring that the rotation of the moving scroll disk 2 can be reliably transmitted to the impeller 11 through the connecting member 12 to realize the rotation of the impeller 11. The working process is as follows: When the moving scroll disk 2 rotates, it drives the impeller 11 to rotate through the connecting member 12, thereby realizing the functions of assisting exhaust and check valve. The connecting member 12 of this embodiment can enable the impeller 11 to rotate stably with the moving scroll disk 2, thereby ensuring the normal realization of the exhaust check valve function. In specific implementation, the connecting member 12 can adopt a connecting member 12 with elasticity, which can absorb a certain amount of vibration and reduce noise while ensuring the connection stability; the shape and number of the impellers 11 can be set according to the specific use scenario. In this embodiment, the impeller 11 is fan-shaped and the number is set to 8.

[0041] Specifically, as Figure 4 shown, the connecting member 12 includes a connecting member 12 body and a first connection point 122 and a second connection point 123 provided at both ends of the connecting member 12 body. The impeller 11 is connected to the first connection point 122, and the moving scroll disk 2 is connected to the second connection point 123. The first connection point 122 is located at the rotation center of the moving scroll disk 2.

[0042] In this embodiment, the body of the connecting member 12 is placed horizontally, such that the first connection point 122 and the second connection point 123 are located at different positions horizontally. The moving scroll disk 2 is connected to the second connection point 123. The first connection point 122 is an eccentric point with respect to the moving scroll disk 2. When the moving scroll disk 2 rotates, it performs a rotational movement about the eccentric point. The first connection point 122 located at the center of rotation drives the wind blade 11 to rotate stably. In this embodiment, the first connection point 122 is arranged at the center of rotation of the moving scroll disk 2, which can make the force on the wind blade 11 more uniform during the rotation process and ensure the stable rotation of the wind blade 11.

[0043] Specifically, as Figure 4 and Figure 5 shown, the first connection point 122 includes a first connection hole 1221, the second connection point 123 includes a second connection hole 1231, the wind blade 11 includes a wind blade 11 body and a first connection column 112 connected to the wind blade 11 body. The first connection column 112 is connected to the first connection hole 1221. On the side of the moving scroll disk 2 facing the stationary scroll disk 3, a second connection column 21 is provided, and the second connection column 21 is connected to the second connection hole 1231.

[0044] In this embodiment, the first connection column 112 is connected to the first connection hole 1221, and the second connection column 21 is connected to the second connection hole 1231. Through the cooperation of the connection column and the connection hole, a reliable connection between the wind blade 11, the connecting member 12, and the moving scroll disk 2 can be achieved. This connection method is convenient for installation and disassembly. During installation, the first connection column 112 is inserted into the first connection hole 1221, and the second connection column 21 is inserted into the second connection hole 1231. When the scroll compressor operates, the moving scroll disk 2 will perform a rotational movement about the first connection point 122 (refer to Figure 8 and Figure 9 ). When the moving scroll disk 2 moves, the second connection column 21 (the second connection point 123) will also perform a circular movement about the first connection point 122. Since the wind blade 11 and the connecting member 12 are connected at the first connection point 122, when the second connection column 21 performs a circular movement, it drives the first connection point 122 to rotate, and further drives the wind blade 11 to rotate, realizing the drive of the moving scroll disk 2 for the auxiliary exhaust check valve device, achieving the effects of reducing the exhaust resistance, increasing the exhaust rate, and oil droplet aggregation, and improving the performance of the scroll compressor.

[0045] Specifically, as Figure 1 、 Figure 3 and Figure 6 shown, the wind blade assembly 1 further includes a fixing member 13 installed in the exhaust port 31. A through hole 131 is provided in the middle of the fixing member 13, and the first connection column 112 passes through the through hole 131 and is connected to the first connection hole 1221.

[0046] In this embodiment, the fixing member 13 is used to fix the wind blade 11 to ensure the stable position of the wind blade 11 in the exhaust port 31 and prevent the wind blade 11 from shifting during operation. During installation, first install the fixing member 13 in the exhaust port 31. The installation method can be fixed to the exhaust port 31 by screws or can be movably installed in the exhaust port 31. When the fixing member 13 is fixed to the exhaust port 31 by screws, the moving scroll disk 2 rotates to drive the wind blade 11 to rotate, and the fixing member 13 does not rotate; when the fixing member 13 is movably installed in the exhaust port 31, the moving scroll disk 2 rotates to drive the wind blade 11 to rotate, and the fixing member 13 also rotates with the wind blade 11. Then, pass the first connecting column 112 of the wind blade 11 through the through hole 131 of the fixing member 13 and connect it to the first connecting hole 1221 of the connector 12 body, realizing the stable installation and connection of the wind blade 11 and ensuring the normal operation of the exhaust check device.

[0047] During specific implementation, the through hole 131 is a circular hole. The fixing member 13 includes an annular fixing frame and support bars. At least two support bars are provided and are cross - arranged in the annular fixing frame. The through hole 131 is arranged at the intersection of the support bars, and the intersection is located in the middle of the fixing member 13.

[0048] Specifically, as Figure 4 and Figure 5 shown, a limiting member 113 is provided at one end of the first connecting column 112 extending towards the side. A limiting hole 1222 communicating with the second connecting hole 1231 is provided on the side of the first connecting hole 1221, and the limiting member 113 is limited in the limiting hole 1222.

[0049] In this embodiment, in order to achieve the stable connection between the wind blade 11 and the connector 12, a limiting member 113 is provided at one end of the first connecting column 112 connected to the first connecting hole 1221 and extending towards the side. A limiting hole 1222 communicating with the second connecting hole 1231 is provided on the side of the first connecting hole 1221. Through the cooperation of the limiting member 113 and the limiting hole 1222, further limiting of the wind blade 11 is carried out to prevent the wind blade 11 from having axial displacement during rotation and ensure its stable operation. During specific implementation, since the first connecting column 112 needs to pass through the through hole 131 to connect with the connector 12, and the through hole 131 is a circular hole, in order to enable the first connecting column 112 to smoothly pass through the through hole 131, it is preferably to set the diameter of the through hole 131 to be greater than or equal to the sum of the diameter of the first connecting column 112 and the dimension of the extension of the limiting member 113; or, set the through hole 131 to be in the shape corresponding to the first connecting hole 1221, but the size of the through hole 131 is slightly larger than that of the first connecting hole 1221, so that one end of the first connecting column 112 can smoothly pass through the through hole 131 and be limited in the limiting hole 1222 by the limiting member 113.

[0050] During installation, one end of the first connecting column 112 passes through the through hole 131, and the limiting member 113 is aligned with the limiting hole 1222 and inserted, thereby realizing the limitation of the wind blade 11; during the working process, the limiting member 113 limits the axial movement of the wind blade 11 in the limiting hole 1222 to ensure the stable rotation of the wind blade 11.

[0051] Specifically, as Figure 3 shown, the exhaust port 31 includes an exhaust hole 311 and a sink 312. The sink 312 is disposed on the side of the stationary scroll plate 3 close to the end face relative to the exhaust hole 311, and the wind blade assembly 1 is located in the sink 312.

[0052] In this embodiment, in order to enable the wind blade assembly 1 to normally achieve the exhaust check function, it is preferably to install the wind blade assembly 1 at the forefront of the exhaust direction of the exhaust port 31. The exhaust port 31 of this embodiment includes an exhaust port 31 and a sink 312. Therefore, it is preferably to install the sink 312 at the front end of the exhaust direction of the exhaust hole 311, and install the wind blade assembly 1 in the sink 312, so that during the exhaust process, after the gas enters the sink 312 through the exhaust hole 311, the wind blade assembly 1 is driven by the moving scroll plate 2 to assist the gas to be discharged. By arranging the wind blade assembly 1 in the sink 312 in this embodiment, the wind blade assembly 1 can be protected, improving the safety and reliability of the exhaust check device, and at the same time optimizing the overall structural layout of the scroll compressor.

[0053] During specific implementation, a smooth coating can be provided on the inner wall of the sink 312 to reduce the frictional resistance when the wind blade assembly 1 rotates.

[0054] Specifically, the outer diameter of rotation of the wind blade 11 is less than or equal to the diameter of the sink 312.

[0055] In this embodiment, in order to ensure that the wind blade 11 can rotate freely in the sink 312 and avoid collision between the wind blade 11 and the inner wall of the sink 312, it is preferably to set the outer diameter of rotation of the wind blade 11 to be less than or equal to the diameter of the sink 312 to ensure the normal operation of the wind blade assembly 1, so that the wind blade 11 rotates in the sink 312 driven by the moving scroll plate 2. Since its outer diameter of rotation is adapted to the diameter of the sink 312, there will be no interference with the inner wall of the sink 312, ensuring the normal operation of the wind blade assembly 1 and reducing wear and failures caused by collision. During specific implementation, the wind blade assembly 1 can adopt a wind blade 11 or a sink 312 structure with adjustable dimensions to adapt to different working requirements.

[0056] Specifically, the top of the wind blade 11 is higher than the sink 312.

[0057] In the prior art, a traditional scroll compressor uses an oil supply structure to supply the refrigerating oil in the oil sump at the bottom of the compressor to the moving scroll 2 and the stationary scroll 3 (hereinafter, the moving scroll 2 and the stationary scroll 3 are simply referred to as the pump body) through the crankshaft, and lubricates the end face of the pump body. This causes a large amount of oil to be mixed in the refrigerant gas discharged from the stationary scroll 3 when the pump body is working, resulting in the oil inside the compressor being carried away, the oil discharge rate of the scroll compressor increasing, the performance decreasing, and it being easy to cause oil shortage and wear problems of the pump body. In this embodiment, the top of the impeller 11 is set higher than the sinking groove 312, so that the impeller 11 can better contact the discharged gas, and the protruding part (i.e., the top) will stir the air flow in the exhaust cavity of the upper part of the stationary scroll 3 to generate a rotating flow field (see the rotating arrow shown in Figure 7 ), which has a centrifugal oil separation effect on the discharged oil-gas fluid, aggregates small oil droplets into larger oil droplets by centrifugal rotation, and then flows into the internal chamber of the scroll compressor.

[0058] In specific implementation, according to the actual exhaust demand and gas flow rate, design the height of the top of the impeller 11 higher than the sinking groove 312, or adopt a structure of the impeller 11 with adjustable height to adjust the height of the impeller 11 higher than the sinking groove 312 according to different working states.

[0059] Combined with Figure 10 shown, Figure 10 is the CFD simulation result diagram of oil separation for the compressor. The simulation results show that in the cavity of the scroll compressor, the larger the particle size of the oil droplets, the less likely they are to be discharged through the exhaust port, the higher the separation efficiency, and the lower the oil circulation rate. Therefore, by adding a centrifugal oil separation structure (i.e., an exhaust check device) at the exhaust port 31 of the stationary scroll 3, and aggregating the oil droplets by the protruding part of the impeller assembly, the particle size of the oil droplets is increased, resulting in a reduction in the oil circulation rate of the compressor oil.

[0060] The exhaust check device of the embodiment of the present invention enables the oil-gas fluid to separate oil and refrigerant at the first time when discharging from the pump body, reduces the oil discharge rate of the scroll compressor, and improves the performance and reliability of the scroll compressor. The device has a simple structure, and the oil fluid in the oil-gas fluid can be relatively easily separated by centrifugal force, achieving the purpose of reducing the oil discharge rate. Moreover, through the mechanical movement of the moving scroll being converted into the mechanical movement of the traditional check structure to realize the centrifugal movement of the discharged oil-gas fluid, the separation ability of the oil-gas fluid is increased, achieving the purpose of reducing the oil circulation rate. In addition, the device can continuously operate to assist the pump body in exhausting, reduce the exhaust resistance, and form an air flow protection cover on the surface of the exhaust port, achieving the purpose of exhaust check. At the same time, the wear problem between the valve disc and the valve seat caused by the reciprocating movement of the exhaust check valve disc in the existing structure is eliminated, improving the reliability of the scroll compressor.

[0061] As Figures 2-3As shown in the figure, an embodiment of the present invention further provides a scroll compressor, which includes a stationary scroll plate 3 and a moving scroll plate 2 connected in sequence axially. The stationary scroll plate 3 has an exhaust port 31, and also includes the exhaust check device as described above.

[0062] In this embodiment, the above exhaust check device is applied to the scroll compressor. When the scroll compressor works, the moving scroll plate 2 drives the blade assembly 1 of the exhaust check device to rotate, realizing the normal discharge and effective check of gas, improving the working efficiency and service life of the scroll compressor, and reducing the operation cost.

[0063] In specific implementation, the scroll compressor further includes an upper bracket 4 and an upper cover 5. The stationary scroll plate 3 and the moving scroll plate 2 are connected in sequence axially. The upper cover 5 is arranged above the stationary scroll plate 3, and the upper bracket 4 is arranged below the moving scroll plate 2, so that the order of these four components from top to bottom axially is upper cover 5 - stationary scroll plate 3 - moving scroll plate 2 - upper bracket 4. The exhaust check device is arranged on the stationary scroll plate 3, specifically, the blade assembly 1 is arranged in the exhaust port 31 of the stationary scroll plate 3, thus realizing stable assembly.

[0064] As described above, the above are only specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art in the technical field disclosed by the present invention can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An exhaust check device is applied to a scroll compressor. The scroll compressor includes a stationary scroll plate and a moving scroll plate that are sequentially connected in the axial direction. The stationary scroll plate has an exhaust port, and is characterized in that, The exhaust check device includes a blade assembly, the blade assembly is arranged in the exhaust port, one end of the blade assembly is connected to the moving scroll plate, and the rotation of the moving scroll plate can drive the blade assembly to rotate self - sufficiently.

2. The exhaust check device according to claim 1, characterized in that, The blade assembly includes a blade and a connecting piece, one end of the connecting piece is connected to the blade, and the other end of the connecting piece is connected to the moving scroll plate.

3. The exhaust check device according to claim 2, characterized in that, The connecting piece includes a connecting piece body and a first connection point and a second connection point arranged at both ends of the connecting piece body. The blade is connected to the first connection point, the moving scroll plate is connected to the second connection point, and the first connection point is located at the rotation center of the moving scroll plate.

4. The exhaust check device according to claim 3, characterized in that, The first connection point includes a first connection hole, the second connection point includes a second connection hole, the blade includes a blade body and a first connection post connected to the blade body, the first connection post is connected to the first connection hole, and a second connection post is arranged on the side of the moving scroll plate facing the stationary scroll plate, and the second connection post is connected to the second connection hole.

5. The exhaust check device according to claim 4, characterized in that, The blade assembly further includes a fixing piece installed in the exhaust port, a through - hole is arranged in the middle of the fixing piece, and the first connection post passes through the through - hole and is connected to the first connection hole.

6. The exhaust check device according to claim 4, characterized in that, A limiting piece extends towards the side at one end of the first connection post, a limiting hole communicating with the second connection hole is arranged on the side of the first connection hole, and the limiting piece is limited in the limiting hole.

7. The exhaust check device according to claim 2, characterized in that The exhaust port includes an exhaust hole and a sunk groove, the sunk groove is arranged on the side of the stationary scroll plate close to the end face relative to the exhaust hole, and the blade assembly is located in the sunk groove.

8. The exhaust check device according to claim 7, characterized in that, The outer diameter of rotation of the blade is less than or equal to the diameter of the sunk groove.

9. The exhaust check device according to claim 7, characterized in that The top of the blade is higher than the sunk groove.

10. A scroll compressor, comprising a stationary scroll plate and a moving scroll plate that are sequentially connected axially, wherein the stationary scroll plate has an exhaust port, characterized in that, It also includes the exhaust check device according to any one of claims 1 - 9.

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