Check valve and scroll compressor thereof

Abstract

The check valve comprises a valve seat assembly and a valve plate, the valve seat assembly is arranged on a static scroll plate, an air passing cavity is formed in the side wall, facing the static scroll plate, of the valve seat assembly, and the valve plate is movably arranged in the air passing cavity in the axial direction of an exhaust hole. The valve seat assembly is provided with an air passing notch enabling the outside to be communicated with the air passing cavity, and the exhaust hole and the air passing cavity are oppositely arranged. Due to the fact that the side wall, far away from the static scroll plate, of the air passing cavity is excluded from the end, far away from the static scroll plate, of the valve plate, when the compressor works for exhausting, the valve plate and the side wall, far away from the static scroll plate, of the air passing cavity are always spaced, and therefore the check valve can prevent the valve plate from being blocked when the compressor works for exhausting. And the valve plate flaps the valve seat assembly to generate noise, so that the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor manufacturing, in particular to a check valve and a scroll compressor thereof. Background Art

[0002] Scroll compressors have been widely used in multi-connected systems. However, during the process of the scroll compressor stopping working, due to the pressure difference between the inner and outer cavities, the moving and static scroll disks will perform reverse movement, affecting the performance of the compressor. Therefore, how to prevent the reverse movement of the compressor during the shutdown process has become one of the key technologies. The common technical paths are divided into two types. One is called the suction check mechanism, and the other is the exhaust check mechanism. Both check mechanisms use valve plates to block the conduction of the pressure difference between the compression chamber and the outside, preventing the pressure difference from causing the reverse rotation of the moving and static scroll disks.

[0003] However, the flapping sound of the valve plate is a conventional mechanical noise. The scroll compressor using the exhaust check mechanism of the valve plate type generates relatively large mechanical noise during operation due to the valve plate flapping against the valve seat assembly. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a check valve and a scroll compressor thereof, aiming to solve the technical problem that the scroll compressor with the exhaust anti-reverse method in the related technology generates mechanical noise due to the valve plate flapping against the valve seat assembly during operation.

[0005] To solve the above problems, according to one aspect of the present application, an embodiment of the utility model provides a check valve for a scroll compressor. The scroll compressor includes a static scroll disk, and an exhaust hole penetrating upward is opened on the static scroll disk. The check valve includes a valve seat assembly and a valve plate. The valve seat assembly is arranged on the static scroll disk. An air passage chamber is constructed on the side wall of the valve seat assembly facing the static scroll disk. The valve plate is movably arranged along the axial direction of the exhaust hole in the air passage chamber. The valve seat assembly is constructed with an air passage notch for communicating the outside with the air passage chamber. The exhaust hole is arranged opposite to the air passage chamber; the side wall of the air passage chamber away from the static scroll disk repels the end of the valve plate away from the static scroll disk.

[0006] In some embodiments, both the valve seat assembly and the valve plate are made of magnetic materials, and the magnetic pole polarities of the side wall of the air passage chamber away from the static scroll disk and the end of the valve plate away from the static scroll disk are the same.

[0007] In some embodiments, there are at least two air passage notches, and at least two air passage notches are evenly distributed in the circumferential direction of the valve seat assembly.

[0008] In some embodiments, the check valve further includes a locking member. At least two first through holes are formed in the valve seat assembly. At least two of the first through holes and at least two of the gas passing notches are alternately and evenly distributed in the circumferential direction of the valve seat assembly. The stationary scroll plate is formed with at least two locking holes corresponding to the first through holes one by one. A locking member is inserted through each of the first through holes. One end of the locking member is clamped on the side of the valve seat assembly away from the stationary scroll plate, and the other end of the locking member is locked with any one of the locking holes.

[0009] In some embodiments, the check valve further includes a gasket. The gasket is clamped between the valve seat assembly and the stationary scroll plate. The gasket is provided with a second through hole corresponding to the gas passing chamber and at least two third through holes corresponding to the first through holes one by one. The inner diameter of the second through hole is smaller than the outer diameter of the valve plate.

[0010] In some embodiments, in the axial direction of the exhaust hole, the distance between the side wall of the gas passing chamber away from the stationary scroll plate and the stationary scroll plate is H1, and the thickness of the valve plate is H2. The difference a between H1 and H2 satisfies: 6mm < a < 8mm;

[0011] And / or, the gas passing notch penetrates from the side wall of the gas passing chamber away from the stationary scroll plate to the end of the valve seat assembly facing the stationary scroll plate.

[0012] In some embodiments, the projection of the exhaust hole on the valve plate is entirely located within the valve plate.

[0013] In some embodiments, the exhaust hole and the gas passing chamber are both circular holes and are coaxially arranged. The valve plate is a circular plate structure. The inner diameter of the gas passing chamber and the outer diameter of the valve plate are both larger than the inner diameter of the exhaust hole.

[0014] In some embodiments, the wrapping rate b of the valve seat assembly to the valve plate satisfies: 45% < b < 55%.

[0015] According to another aspect of the present application, an embodiment of the present invention further provides a scroll compressor, which includes a stationary scroll plate and the check valve as described above.

[0016] Compared with the prior art, the check valve of the present invention has at least the following beneficial effects:

[0017] An embodiment of the present utility model discloses a check valve, which is specifically applied to a scroll compressor. The scroll compressor of the present utility model includes a stationary scroll plate, and an exhaust hole penetrating upward is provided on the stationary scroll plate. The check valve of the present utility model includes a valve seat assembly and a valve plate. The valve seat assembly is arranged on the stationary scroll plate, specifically on the top of the stationary scroll plate. An air passage chamber is constructed on the side wall of the valve seat assembly facing the stationary scroll plate. The valve plate is movably arranged in the air passage chamber along the axial direction of the exhaust hole, specifically, the valve plate can move up and down in the air passage chamber. When the valve plate is not impacted by air flow, it fits with the top plane of the stationary scroll plate under the action of gravity. The valve seat assembly is constructed with an air passage notch for communicating the outside with the air passage chamber, and the air flow in the air passage chamber is discharged to the exhaust chamber through the air passage notch. Since the exhaust hole and the air passage chamber are oppositely arranged, when the scroll compressor stops, the valve plate of the check valve of the present utility model cuts off the exhaust chamber and the compression chamber, thereby preventing the pressure difference between the exhaust chamber and the compression chamber from being consistent. At this time, the pressure difference between the compression chamber and the suction chamber is equal to that at the time of shutdown and will not be generated. Compared with the suction check mechanism, the exhaust check valve of the present utility model has a better exhaust check effect by adopting the exhaust check mechanism method. And it does not require a certain large resistance, does not consume a certain amount of suction work, reduces the power consumption of the compressor, and improves the compression performance.

[0018] Since the side wall of the air passage chamber of the present utility model away from the stationary scroll plate repels the end of the valve plate away from the stationary scroll plate, when the compressor works for exhaust, there is always a gap between the valve plate and the side wall of the air passage chamber away from the stationary scroll plate. Therefore, the check valve of the present utility model can avoid the valve plate hitting the valve seat assembly and generating noise when the compressor works for exhaust, and improves the quality of the product.

[0019] On the other hand, the scroll compressor provided by the present utility model is manufactured based on the above check valve, and its beneficial effects refer to the beneficial effects of the above check valve, which will not be elaborated here one by one.

[0020] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the present utility model and combines with the drawings to describe in detail as follows. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a cross-sectional view of the scroll compressor provided by the embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the decomposition structure of the scroll compression provided by the embodiment of the present utility model;

[0024] Figure 3 Schematic diagram of the decomposition structure of the check valve provided by the embodiment of the present utility model;

[0025] Figure 4 Schematic diagram of the structure of the valve seat assembly of the check valve provided by the embodiment of the present utility model;

[0026] Figure 5 Cross-sectional view of the valve seat assembly of the check valve provided by the embodiment of the present utility model;

[0027] Figure 6 Schematic diagram of the structure of the gasket of the check valve provided by the embodiment of the present utility model;

[0028] Figure 7 Schematic diagram of the structure of the valve disc of the check valve provided by the embodiment of the present utility model;

[0029] Figure 8 Schematic diagram of the assembled structure of the valve seat assembly and the gasket of the check valve provided by the embodiment of the present utility model;

[0030] Figure 9 Schematic diagram of the assembled structure of the check valve provided by the embodiment of the present utility model.

[0031] Explanation of reference numerals:

[0032] 1, stationary scroll plate; 11, exhaust hole; 12, locking hole;

[0033] 2, valve seat assembly; 21, gas passage chamber; 22, gas passage notch; 23, first through hole;

[0034] 3, valve disc;

[0035] 4, locking member;

[0036] 5, gasket; 51, second through hole; 52, third through hole;

[0037] 61, compression chamber; 62, exhaust chamber; 63, suction chamber;

[0038] 7, moving scroll plate. Detailed implementation manners

[0039] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, elaborate in detail on the specific implementation manners, structures, features, and effects of the application based on the present utility model. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0040] In the description of the present utility model, it should be clear that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence; the terms "vertical", "horizontal", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model, rather than meaning that the indicated device or element must have a specific orientation or position, so it cannot be understood as a limitation to the present utility model.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] As Figure 1 shown, in an existing scroll compressor, generally, the compressor check mechanism is divided into a suction check mechanism and an exhaust check mechanism.

[0043] For a scroll compressor generally using a suction check mechanism, when the scroll compressor stops, the suction check mechanism can cut off the compression chamber 61 and the suction chamber 63, thereby preventing the pressure difference between the compression chamber 61 and the suction chamber 63 from being consistent. At this time, the pressure difference between the compression chamber 61 and the exhaust chamber 62 is equal. However, there is a certain reverse rotation situation of the moving scroll disk 7 and the stationary scroll disk 1 in the compression chamber 61, and the anti-reverse rotation effect is poor. Moreover, the suction check mechanism requires a certain large resistance, which will consume a certain amount of suction work and increase the power consumption of the compressor. Therefore, generally, the suction check mechanism will lose a certain amount of suction work and affect the compression performance.

[0044] In addition, compressor noise is also one of the key technologies for evaluating compressors. The noise of scroll compressors is divided into air flow pulsation, mechanical noise, motor noise, etc. However, usually, due to the unstable exhaust pressure, the movement of the valve plate 3 is not the ideal up-and-down horizontal floating state. When the compressor stops, the valve plate 3 is impacted by the exhaust gas and reaches the bottom of the valve seat assembly 2, generating mechanical noise.

[0045] Embodiment 1

[0046] As Figure 1-9 shown, an embodiment of the present invention provides a check valve applied to a scroll compressor. The scroll compressor includes a stationary scroll plate 1, and an exhaust hole 11 penetrating upward is formed on the stationary scroll plate 1. The check valve includes a valve seat assembly 2 and a valve plate 3. The valve seat assembly 2 is disposed on the stationary scroll plate 1. A gas passage chamber 21 is formed on the side wall of the valve seat assembly 2 facing the stationary scroll plate 1. The valve plate 3 is movably disposed in the gas passage chamber 21 along the axial direction of the exhaust hole 11. The valve seat assembly 2 is provided with a gas passage notch 22 for communicating the outside with the gas passage chamber 21. The exhaust hole 11 and the gas passage chamber 21 are disposed opposite to each other; the side wall of the gas passage chamber 21 away from the stationary scroll plate 1 repels the end of the valve plate 3 away from the stationary scroll plate 1.

[0047] In this embodiment, the check valve is specifically applied to a scroll compressor. The scroll compressor of this embodiment includes a stationary scroll plate 1, and an exhaust hole 11 penetrating upward is formed on the stationary scroll plate 1. The check valve of this embodiment includes a valve seat assembly 2 and a valve plate 3. The valve seat assembly 2 is disposed on the stationary scroll plate 1, specifically on the top of the stationary scroll plate 1. A gas passage chamber 21 is formed on the side wall of the valve seat assembly 2 facing the stationary scroll plate 1. The valve plate 3 is movably disposed in the gas passage chamber 21 along the axial direction of the exhaust hole 11, specifically, the valve plate 3 can move up and down in the gas passage chamber 21. When the valve plate 3 is not impacted by the air flow, it fits against the top plane of the stationary scroll plate 1 under the action of gravity. The valve seat assembly 2 is provided with a gas passage notch 22 for communicating the outside with the gas passage chamber 21. Through the gas passage notch 22, the air flow in the gas passage chamber 21 is discharged to the exhaust chamber 62. Since the exhaust hole 11 and the gas passage chamber 21 are disposed opposite to each other, when the scroll compressor stops, the valve plate 3 of the check valve in this embodiment cuts off the exhaust chamber 62 and the compression chamber 61, thereby blocking the pressure difference between the exhaust chamber 62 and the compression chamber 61 from being the same. At this time, the pressure difference between the compression chamber 61 and the suction chamber 63 is equal, which is the same as when the compressor stops, and no mechanical noise will be generated. Compared with the suction check mechanism, the exhaust check valve of this embodiment has a better exhaust check effect by adopting the exhaust check mechanism. And it does not require a certain large resistance, does not consume a certain amount of suction work, reduces the power consumption of the compressor, and improves the compression performance.

[0048] Since the side wall of the air passing chamber 21 away from the stationary scroll disk 1 in this embodiment repels the end of the valve plate 3 away from the stationary scroll disk 1, there is always a gap between the valve plate 3 and the side wall of the air passing chamber 21 away from the stationary scroll disk 1 when the compressor is working for exhaust. Therefore, the check valve in this embodiment can avoid the noise generated by the valve plate 3 hitting the valve seat assembly 2 when the compressor is working for exhaust, improving the product quality.

[0049] In some embodiments, both the valve seat assembly 2 and the valve plate 3 are made of magnetic materials, and the magnetic pole polarity of the side wall of the air passing chamber 21 away from the stationary scroll disk 1 is the same as that of the end of the valve plate 3 away from the stationary scroll disk 1.

[0050] In this embodiment, by making both the valve seat assembly 2 and the valve plate 3 of magnetic materials, and the magnetic pole polarity of the side wall of the air passing chamber 21 away from the stationary scroll disk 1 being the same as that of the end of the valve plate 3 away from the stationary scroll disk 1, it can be ensured that the side wall of the air passing chamber 21 away from the stationary scroll disk 1 repels the end of the valve plate 3 away from the stationary scroll disk 1. When the compressor is working for exhaust, there is always a gap between the valve plate 3 and the side wall of the air passing chamber 21 away from the stationary scroll disk 1. Therefore, the check valve in this embodiment can avoid the noise generated by the valve plate 3 hitting the valve seat assembly 2 when the compressor is working for exhaust, improving the product quality.

[0051] In some embodiments, an insert is provided on the side wall of the air passing chamber 21 away from the stationary scroll disk 1. Both the insert and the valve plate 3 are made of magnetic materials, and the magnetic pole polarity of the side wall of the insert facing the stationary scroll disk 1 is the same as that of the end of the valve plate 3 away from the stationary scroll disk 1.

[0052] In this embodiment, by providing an insert on the side wall of the air passing chamber 21 away from the stationary scroll disk 1, making both the insert and the valve plate 3 of magnetic materials, and the magnetic pole polarity of the side wall of the insert facing the stationary scroll disk 1 being the same as that of the end of the valve plate 3 away from the stationary scroll disk 1, this structure can also make the side wall of the air passing chamber 21 away from the stationary scroll disk 1 repel the end of the valve plate 3 away from the stationary scroll disk 1. When the compressor is working for exhaust, there is always a gap between the valve plate 3 and the side wall of the air passing chamber 21 away from the stationary scroll disk 1. Therefore, the check valve in this embodiment can avoid the noise generated by the valve plate 3 hitting the valve seat assembly 2 when the compressor is working for exhaust, improving the product quality.

[0053] In some embodiments, there are at least two air passing notches 22, and at least two of the air passing notches 22 are evenly distributed in the circumferential direction of the valve seat assembly 2. This structure can ensure the smooth diversion of the airflow in the air passing chamber 21 to the exhaust chamber 62.

[0054] In some embodiments, the check valve further includes a locking member 4. At least two first through holes 23 are formed in the valve seat assembly 2. At least two of the first through holes 23 and at least two of the air passing notches 22 are alternately and evenly distributed in the circumferential direction of the valve seat assembly 2. The stationary scroll plate 1 is formed with at least two locking holes 12 respectively corresponding to at least two of the first through holes 23 one by one. The locking member 4 is inserted through each of the first through holes 23. One end of the locking member 4 is clamped on the side of the valve seat assembly 2 away from the stationary scroll plate 1, and the other end of the locking member 4 is locked with any one of the locking holes 12.

[0055] In this embodiment, the check valve further includes a locking member 4. At least two first through holes 23 are formed in the valve seat assembly 2. At least two of the first through holes 23 and at least two of the air passing notches 22 are alternately and evenly distributed in the circumferential direction of the valve seat assembly 2. The stationary scroll plate 1 is formed with at least two locking holes 12 respectively corresponding to at least two of the first through holes 23 one by one. The locking member 4 is inserted through each of the first through holes 23. One end of the locking member 4 is clamped on the side of the valve seat assembly 2 away from the stationary scroll plate 1, and the other end of the locking member 4 is locked with any one of the locking holes 12, so that the valve seat assembly 2 is fixed on the stationary scroll plate 1.

[0056] In some embodiments, the check valve further includes a gasket 5. The gasket 5 is clamped between the valve seat assembly 2 and the stationary scroll plate 1. The gasket 5 is provided with a second through hole 51 corresponding to the air passing chamber 21 and at least two third through holes 52 respectively corresponding to at least two of the first through holes 23 one by one. The inner diameter of the second through hole 51 is smaller than the outer diameter of the valve plate 3. The sealing performance between the valve plate 3 and the stationary scroll plate 1 can be improved by the gasket 5.

[0057] In some embodiments, in the axial direction of the exhaust hole 11, the distance between the side wall of the air passing chamber 21 away from the stationary scroll plate 1 and the stationary scroll plate 1 is H1, and the thickness of the valve plate 3 is H2. The difference a between H1 and H2 satisfies: 6mm < a < 8mm. When 6mm < a < 8mm, the stroke of the valve plate 3 is optimal at 6mm - 8mm. When the stroke of the valve plate 3 is small, exhaust shock is likely to occur. When the stroke of the valve plate 3 is large, it will affect the exhaust resistance and exhaust work.

[0058] In some embodiments, the air passing notch 22 penetrates from the side wall of the air passing chamber 21 away from the stationary scroll plate 1 to the end of the valve seat assembly 2 facing the stationary scroll plate 1.

[0059] In some embodiments, the projection of the exhaust hole 11 on the valve plate 3 is entirely located within the valve plate 3 to ensure that the valve plate 3 blocks the exhaust hole 11.

[0060] In some embodiments, the exhaust hole 11 and the air passage chamber 21 are both circular holes and are coaxially arranged. The valve plate 3 is a circular plate structure. The inner diameter of the air passage chamber 21 and the outer diameter of the valve plate 3 are both larger than the inner diameter of the exhaust hole 11. This structure is convenient for manufacturing and easy to assemble.

[0061] In some embodiments, the wrapping rate b of the valve seat assembly 2 around the valve plate 3 satisfies: 45% < b < 55%. As Figure 8 shown, when there are two air passage notches 22, the wrapping rate b refers to the arc segment wrapped by the valve seat assembly 2 (the circumference of the inner circumference of the air passage chamber 21 minus the lengths of the two air passage notches 22 on the inner circumference of the air passage chamber 21) / the outer circumference of the valve plate 3; it is optimal when 45% < b < 55%. A smaller wrapping rate b will cause the valve plate 3 to float up and down unstably, and a larger wrapping rate b will affect the exhaust smoothness and the performance of the compressor.

[0062] Embodiment 2

[0063] The embodiment of the present invention also provides a scroll compressor, which includes a stationary scroll disk 1 and the check valve of Embodiment 1.

[0064] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above-described devices, apparatuses, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0065] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art 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. A check valve for a scroll compressor, the scroll compressor including a stationary scroll plate having an exhaust hole penetrating upwardly therethrough, characterized in that, The check valve includes a valve seat assembly and a valve disc. The valve seat assembly is disposed on the stationary scroll plate. A gas passage chamber is formed on the side wall of the valve seat assembly facing the stationary scroll plate. The valve disc is movably disposed in the gas passage chamber along the axial direction of the exhaust hole. The valve seat assembly is provided with a gas passage notch for communicating the outside with the gas passage chamber. The exhaust hole is disposed opposite to the gas passage chamber; the side wall of the gas passage chamber away from the stationary scroll plate repels one end of the valve disc away from the stationary scroll plate.

2. The check valve according to claim 1, characterized in that, Both the valve seat assembly and the valve disc are made of magnetic materials. The magnetic pole polarities of the side wall of the gas passage chamber away from the stationary scroll plate and one end of the valve disc away from the stationary scroll plate are the same.

3. The check valve according to claim 2, characterized in that, There are at least two gas passage notches, and at least two gas passage notches are evenly distributed in the circumferential direction of the valve seat assembly.

4. The check valve according to claim 3, characterized in that, The check valve further includes a locking member. At least two first through holes are formed on the valve seat assembly. At least two first through holes and at least two gas passage notches are alternately and evenly distributed in the circumferential direction of the valve seat assembly. The stationary scroll plate is provided with at least two locking holes corresponding to the first through holes one by one. The locking member passes through each first through hole. One end of the locking member is clamped on the side of the valve seat assembly away from the stationary scroll plate, and the other end of the locking member is locked with any one of the locking holes.

5. The check valve according to claim 4, characterized in that, The check valve further includes a gasket. The gasket is clamped between the valve seat assembly and the stationary scroll plate. The gasket is provided with a second through hole corresponding to the gas passage chamber and at least two third through holes corresponding to the first through holes one by one. The inner diameter of the second through hole is smaller than the outer diameter of the valve disc.

6. The check valve according to claim 1, characterized in that, In the axial direction of the exhaust hole, the distance between the side wall of the gas passage chamber away from the stationary scroll plate and the stationary scroll plate is H1, the thickness of the valve disc is H2, and the difference a between H1 and H2 satisfies: 6 mm < a < 8 mm; And / or, the gas passage notch penetrates from the side wall of the gas passage chamber away from the stationary scroll plate to the end of the valve seat assembly facing the stationary scroll plate.

7. The check valve according to claim 1, characterized in that, The projection of the exhaust hole on the valve disc is entirely located within the valve disc.

8. The check valve according to claim 7, wherein The exhaust hole and the gas passage chamber are both circular holes and are coaxially arranged. The valve disc is a circular sheet structure. The inner diameter of the gas passage chamber and the outer diameter of the valve disc are both larger than the inner diameter of the exhaust hole.

9. The check valve according to any one of claims 1-8, characterized in that, The wrapping rate b of the valve seat assembly to the valve disc satisfies: 45% < b < 55%.

10. A scroll compressor, characterized in that, The scroll compressor includes a stationary scroll plate and the check valve according to any one of claims 1-9.

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