Exhaust check valve, scroll compressor, and refrigeration device

Abstract

Disclosed is an exhaust check valve, comprising a valve seat (100), a valve plate (200), and a valve disc (300), wherein the valve seat (100) is provided with a valve cavity (100A), and a first port (101) and a second port (102) that are communicated with the valve cavity (100A), and a limiting step (110) and a folded edge (120) opposite to the limiting step (110) are provided at the first port (101) of the valve seat (100); the valve plate (200) is mounted at the first port (101), a clearance notch (201) is formed on the side of the valve plate (200) close to the folded edge (120), and hollow holes (202) penetrating through the valve plate (200) in the axial direction are formed in the valve plate (200); the valve disc (300) is slidably provided in the valve cavity (100A) and is located on the side of the valve plate (200) facing away from the folded edge (120), and the valve disc (300) can move away from or close to the valve plate (200) so as to open or block the hollow holes (202). Thus, the problem of poor sealing between the valve disc and the valve plate of the exhaust check valve when a shutdown occurs is solved. Also disclosed are a scroll compressor using the exhaust check valve and a refrigeration device.

Description

Exhaust check valves, scroll compressors and refrigeration equipment

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311135353.8 filed on September 4, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of compressors, and in particular to an exhaust check valve, a scroll compressor, and a refrigeration device. Background Art

[0004] A low-pressure scroll compressor typically consists of an orbiting scroll and a fixed scroll, which compress the working fluid. During normal operation, the refrigerant enters the casing through the suction pipe, is compressed by the pump body, and then discharged from the upper casing, entering the air conditioning system, completing the cycle. If the compressor is shut down in an emergency during system operation, high-pressure refrigerant can backflow into the compressor. Restarting the compressor within a short period of time can pose a serious risk due to the large pressure differential.

[0005] In the related art, scroll compressors effectively prevent the backflow of high-pressure gas by setting an exhaust check valve. However, the existing exhaust check valve may have poor sealing between the valve plate and the valve disc when shutting down, resulting in shutdown noise problems.

[0006] Summary of the Invention

[0007] The main purpose of this application is to propose an exhaust check valve, which aims to improve the sealing ability between the valve disc and the valve plate and reduce the noise of compressor shutdown.

[0008] To achieve the above objectives, the exhaust check valve proposed in this application includes:

[0009] A valve seat, comprising a valve cavity and a first port and a second port communicating with the valve cavity, wherein the valve seat is provided with a limiting step and a folded edge opposite to the limiting step at the first port;

[0010] a valve plate installed at the first port, the valve plate having an avoidance notch on one side close to the folded edge, and the valve plate having a hollow hole extending through both axial sides; and

[0011] The valve disc is slidably disposed in the valve cavity and is located on a side of the valve plate away from the folded edge. The valve disc can move away from or close to the valve plate to open or block the hollow hole.

[0012] In one embodiment of the present application, the avoidance gap is provided at the connection between the axial end surface and the outer peripheral surface of the valve plate.

[0013] In one embodiment of the present application, the avoidance gap is arranged around the outer periphery of the valve plate.

[0014] In one embodiment of the present application, the valve plate includes a first section and a second section connected in the axial direction, and the outer diameter of the first section is smaller than the outer diameter of the second section to form the avoidance gap;

[0015] An edge of the second section close to the first section abuts against the folded edge, and a side of the second section away from the first section abuts against the limiting step.

[0016] In one embodiment of the present application, the axial length of the first section is defined as L1, and the axial length of the valve plate is defined as L, satisfying 0.2≤L1 / L≤0.8.

[0017] In one embodiment of the present application, the axial length L1 of the first section and the axial length L of the valve plate satisfy: L1 / L=0.5.

[0018] In one embodiment of the present application, the folded edge is annular, and the folded edge is bent and extended from the valve seat toward the central axis of the valve plate. The edge of the second section close to the first section is provided with a slope that matches the folded edge.

[0019] In one embodiment of the present application, the outer peripheral wall of the first section is a cylindrical surface;

[0020] Alternatively, the outer peripheral wall of the first section is a conical surface;

[0021] Alternatively, the outer peripheral wall of the first section is an arc surface.

[0022] In one embodiment of the present application, a guide boss is provided at one end of the valve plate away from the folded edge, and the guide boss cooperates with the inner wall of the valve cavity.

[0023] In one embodiment of the present application, a plurality of the hollow holes are provided, and the plurality of the hollow holes are spaced and evenly arranged along the circumference of the valve plate.

[0024] In one embodiment of the present application, an exhaust pipe connected to the second port is also included.

[0025] To achieve the above-mentioned object, the present application further provides a scroll compressor, comprising a housing and the above-mentioned exhaust check valve, wherein the housing is provided with an exhaust port, and the exhaust check valve is installed at the exhaust port. The exhaust check valve comprises:

[0026] A valve seat, comprising a valve cavity and a first port and a second port communicating with the valve cavity, wherein the valve seat is provided with a limiting step and a folded edge opposite to the limiting step at the first port;

[0027] a valve plate installed at the first port, the valve plate having an avoidance notch on one side close to the folded edge, and the valve plate having a hollow hole extending through both axial sides; and

[0028] The valve disc is slidably disposed in the valve cavity and is located on a side of the valve plate away from the folded edge. The valve disc can move away from or close to the valve plate to open or block the hollow hole.

[0029] To achieve the above objectives, the present application also provides a refrigeration device, including the above scroll compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] FIG1 is a schematic structural diagram of an embodiment of an exhaust check valve of the present application;

[0032] FIG2 is a partial enlarged view of point M in FIG1 ;

[0033] FIG3 is a schematic structural diagram of another embodiment of the exhaust check valve of the present application;

[0034] FIG4 is a partial enlarged view of point N in FIG3 ;

[0035] FIG5 is a schematic structural diagram of an embodiment of a valve plate in the present application;

[0036] FIG6 is a schematic structural diagram of another embodiment of a valve plate in the present application;

[0037] FIG7 is a schematic structural diagram of another embodiment of a valve plate in the present application;

[0038] FIG8 is a structural diagram of another embodiment of a valve plate in the present application;

[0039] FIG9 is a schematic structural diagram of the exhaust check valve installed on the scroll compressor in the present application.

[0040] Description of Figure Numbers:

[0041] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0046] The present application proposes an exhaust check valve, which aims to provide an avoidance notch on the valve plate so that the force-bearing area of ​​the valve plate affected by the valve seat fold is offset from the end of the valve plate toward the middle part of the valve plate in the thickness direction, so as to reduce the deformation of the valve plate, thereby reducing the deformation of the contact surface between the valve plate and the valve disc, improving the sealing ability between the valve plate and the valve disc, and reducing the shutdown noise of the compressor.

[0047] In the embodiment of the present application, as shown in FIG. 1 to FIG. 5 , the exhaust check valve includes a valve seat 100 , a valve plate 200 and a valve disc 300 .

[0048] The valve seat 100 is provided with a valve cavity 100A and a first port 101 and a second port 102 connected to the valve cavity 100A. The valve seat 100 is provided with a limiting step 110 and a folded edge 120 opposite to the limiting step 110 at the first port 101; the valve plate 200 is installed on the first port 101, and an avoidance notch 201 is provided on the side of the valve plate 200 close to the folded edge 120, so that the part where the valve plate 200 and the folded edge 120 are in contact with each other is located between the two axial end faces of the valve plate 200, and the valve plate 200 is provided with a hollow hole 202 passing through both axial sides; the valve disc 300 is slidably provided in the valve cavity 100A and is located on the side of the valve plate 200 away from the folded edge 120. The valve disc 300 can move away from or close to the valve plate 200 to open or block the hollow hole 202.

[0049] It can be understood that the valve seat 100 has a hollow cylindrical structure, and a valve cavity 100A is formed therein. The valve cavity 100A can be set as a cylindrical cavity. A first port 101 and a second port 102 are respectively provided on opposite sides of the valve seat 100, which are connected to the valve cavity 100A. The first port 101 is used to install the valve plate 200, and the first port 101 can be connected to the housing of the compressor. The second port 102 is used to connect to the exhaust pipe 400, and the exhaust pipe 400 can be connected to the pipeline of the refrigeration system, so that the high-pressure fluid discharged by the compressor can enter the refrigeration system through the exhaust pipe 400. The connection between the above-mentioned exhaust pipe 400 and the second port 102 and the pipeline connection with the refrigeration system can refer to conventional connection methods and will not be described in detail here. The valve plate 200 is provided with a hollow hole 202 running through both sides of the axis. The valve plate 300 can move away from or close to the valve plate 200 in the valve cavity 100A to open or block the hollow hole 202, so that the exhaust check valve can smoothly exhaust and prevent the backflow of high-pressure gas during shutdown.

[0050] In this embodiment, a limiting step 110 and a folded edge 120 are provided at the first port 101 of the valve seat 100, and an installation position for installing the valve plate 200 is formed between the folded edge 120 and the limiting step 110. During actual installation, the valve plate 200 is first inserted from the first port 101 toward the valve cavity 100A until it is limited by the limiting step 110, and then the folded edge 120 is bent toward the valve plate 200 to squeeze and press the valve plate 200, thereby realizing the installation of the valve plate 200, that is, the valve plate 200 is riveted and fixed to the valve seat 100. Based on this assembly method, the end of the valve plate 200 will be subjected to the inclined extrusion force of the folded edge 120. The force of the folded edge 120 on the valve plate 200 can be decomposed into axial extrusion force and radial extrusion force on the valve plate 200. The axial extrusion force of the folded edge 120 on the valve plate 200 and the axial pressure of the limiting step 110 on the valve plate 200 are offset, that is, the valve plate 200 will not be deformed, and the radial pressure of the folded edge 120 on the valve plate 200 will cause the valve plate 200 to deform, for example, it may cause the middle part of the valve plate 200 to be concave or convex, which will affect the sealing effect of the valve plate 200 and the valve disc 300. Based on this, the present invention The embodiment provides an avoidance notch 201 on the side of the valve plate 200 close to the folding edge 120, so that during assembly, after the valve plate 200 is abutted against the limiting step 110, the part of the valve plate 200 that is first squeezed during the bending process of the folding edge 120 toward the valve plate 200 is closer to the middle position of the thickness of the valve plate 200 than the part squeezed by the valve plate 200 without the avoidance notch 201. In this way, the deformation degree of the valve plate 200 can be reduced, and the deformation degree of the contact surface between the valve plate 200 and the valve disc 300 can be reduced, thereby improving the sealing ability of the valve disc 300 and the valve plate 200, and thus reducing the leakage noise when the compressor is shut down.

[0051] It should be noted that the purpose of providing the relief notch 201 on the side of the valve plate 200 near the folded edge 120 of this embodiment is to shift the stress-bearing area of ​​the valve plate 200 during riveting assembly from the axial end of the valve plate 200 to the middle position near the axial direction of the valve plate 200, thereby reducing the stress deformation of the valve plate 200. In actual application, the shape and structure of the relief notch 201 can be determined according to actual conditions, such as a stepped notch, a circular notch, an arc notch, a triangular notch, or other special-shaped notches.

[0052] As an example, as shown in the table below, a flatness simulation test is performed on the contact surface of the valve plate 200 and the valve disc 300 in this embodiment. By comparing the flatness of the sealing surface of the valve plate 200 without the avoidance notch 201 and the flatness of the sealing surface of the valve plate 200 with the avoidance notch 201, it can be seen that the flatness of the sealing surface of the original valve plate 200 caused by deformation (that is, the absolute value of the difference between the maximum deformation and the minimum deformation) is 7.91μm. After the avoidance design, the deformation flatness of the sealing surface of the valve plate 200 is 0.51μm, which is a decrease of 93.5%. The effect is very obvious.

[0053] It can be seen that the technical solution of the present application can significantly reduce the deformation of the contact surface between the valve plate 200 and the valve disc 300 after riveting, thereby improving the sealing ability between the valve disc 300 and the valve plate 200.

[0054] In actual application, the shape and structure of the limiting step 110 can be determined according to actual conditions. The limiting step 110 can be a step structure that protrudes from the valve seat 100 toward the valve cavity 100A, or a step structure that is recessed on the inner wall of the valve seat 100. The specific structure is not limited here, as long as it can ensure the limiting installation of the valve plate 200.

[0055] As an example, the folding edge 120 is connected to the end of the valve seat 100, and the folding edge 120 can be an integral structure with the valve seat 100. The folding edge 120 can be a sheet metal part.

[0056] In the exhaust check valve of the technical solution of the present application, the valve seat 100 is provided with a valve cavity 100A and a first port 101 and a second port 102 connected to the valve cavity 100A. The valve plate 200 is installed at the first port 101, and the valve plate 200 is provided with a hollow hole 202 that passes through both sides of the axial direction. The valve disc 300 can move away from or close to the valve plate 200 in the valve cavity 100A to open or block the hollow hole 202, thereby achieving the function of smoothly exhausting the exhaust check valve and preventing the backflow of high-pressure gas during shutdown. By providing a limiting step 110 and a folding edge 120 at the first port 101, an installation position for installing the valve plate 200 is formed between the folding edge 120 and the limiting step 110. By setting an avoidance notch 201 on the side of the valve plate 200 close to the folded edge 120, the part where the valve plate 200 and the folded edge 120 are in contact with each other is located between the two axial end faces of the valve plate 200, thereby reducing the degree of deformation of the valve plate 200 during the assembly process, and further reducing the degree of deformation of the contact surface between the valve plate 200 and the valve disc 300, thereby improving the sealing ability of the valve disc 300 and the valve plate 200, and thereby reducing the leakage noise when the compressor is shut down.

[0057] In one embodiment of the present application, referring to FIG. 2 , FIG. 4 , and FIG. 5 to FIG. 8 , the avoidance notch 201 is provided at the connection between the axial end surface and the outer peripheral surface of the valve plate 200 .

[0058] It can be understood that in the actual assembly process, the folded edge 120 bends from the valve seat 100 toward the central axis to squeeze and hold the valve plate 200. Then, the part of the valve plate 200 that is first subjected to the squeezing force of the folded edge 120 is located at the connection between the axial end face and the outer peripheral surface of the valve plate 200. Based on this, this embodiment sets the avoidance notch 201 at the connection between the axial end face and the outer peripheral surface of the valve plate 200, so that the position where the valve plate 200 is first squeezed during the bending process of the folded edge 120 is closer to the middle position in the thickness direction of the valve plate 200, thereby achieving the purpose of reducing the degree of assembly deformation of the valve plate 200.

[0059] It should be noted that if the avoidance notch 201 is provided solely on the axial end surface of the valve plate 200, the folded edge 120 will still first press against the axial end surface edge of the valve plate 200 when it bends from the valve seat 100 toward the valve plate 200, thus still causing significant deformation of the valve plate 200. Similarly, if the avoidance notch 201 is provided solely on the outer circumferential surface of the valve plate 200, the folded edge 120 will still first press against the axial end surface edge of the valve plate 200 when it bends from the valve seat 100 toward the valve plate 200, thus still causing significant deformation of the valve plate 200.

[0060] In actual application, the avoidance gap 201 can be an annular gap structure surrounding the outer periphery of the valve plate 200, or a scattered gap structure intermittently provided along the edge of the valve plate 200, or a gap structure provided at a certain position along the edge of the valve plate 200, etc. It is understandable that the different structures of the avoidance gap 201 described above can be determined according to the structure of the folded edge 120. For example, the folded edge 120 can be an annular folded edge structure, a scattered folded edge structure, or a folded edge structure at a specific position, etc. The specific structure can be determined according to actual conditions.

[0061] As an example, the avoidance notch 201 is provided around the outer periphery of the valve plate 200 .

[0062] In this embodiment, by setting the avoidance notch 201 around the outer periphery of the valve plate 200, it can be ensured that the part of the valve plate 200 that is first squeezed by the folded edge 120 is not on the axial sides of the valve plate 200, but closer to the middle position in the thickness direction of the valve plate 200, which can further prevent the valve plate 200 from deforming and improve the sealing ability of the valve plate 200 and the valve sheet 300.

[0063] In one embodiment of the present application, referring to Figures 2, 4 and 5 to 8, the valve plate 200 includes a first section 210 and a second section 220 connected along the axial direction, and the outer diameter of the first section 210 is smaller than the outer diameter of the second section 220 to form an avoidance gap 201; the edge of the second section 220 close to the first section 210 is abutted against the folded edge 120, and the side of the second section 220 away from the first section 210 is abutted against the limiting step 110.

[0064] This embodiment illustrates the structure of a valve plate 200. The valve plate 200 includes a first section 210 and a second section 220, each connected to the other. The outer diameter of the first section 210, located near the folded edge 120, is smaller than the outer diameter of the second section 220, located near the stop step 110. Consequently, the connection between the first section 210 and the second section 220 forms a clearance notch 201. In other words, axially from left to right (as shown in the figure), the clearance notch 201 is located to the left of the second section 220, with the edge of the second section 220 closer to the axial center of the valve plate 200. During assembly, the folded edge 120 bends toward the valve plate 200, crossing the clearance notch 201 and initially pressing against the edge of the second section 220. This results in the location of the valve plate 200 being pressed closer to its axial center, thereby reducing deformation of the valve plate 200. Accordingly, the side of the second section 220 facing away from the first section 210 abuts against the stop step 110 for a position limit.

[0065] Further, referring to Figures 2 and 4 , a guide boss 221 is provided on the end of the valve 200 facing away from the folded edge 120. The guide boss 221 cooperates with the inner wall of the valve cavity 100A to provide radial positioning and guide assembly, thereby improving assembly efficiency. For example, the guide boss 221 is provided on the side of the second section 220 facing away from the first section 210.

[0066] In practical applications, the first section 210 and the second section 220 are an integral structure. The valve plate 200 can be integrally formed by mold forming or 3D printing.

[0067] In one embodiment of the present application, the folded edge 120 is annular, and the folded edge 120 bends and extends from the valve seat 100 toward the central axis of the valve plate 200. The edge of the second section 220 close to the first section 210 is provided with a slope 220a that matches the folded edge 120.

[0068] It can be understood that the folded edge 120 is bent from the valve seat 100 toward the central axis of the valve plate 200, and the folded edge 120 is inclined relative to the axial direction of the valve seat 100. In this embodiment, the edge of the second section 220 close to the first section 210 is set as a slope 220a, and the inclination direction of the slope 220a matches the inclination direction of the folded edge 120, thereby increasing the abutment and fitting area between the folded edge 120 and the second section 220, making the force on the valve plate 200 more uniform, and further reducing the degree of force deformation of the valve plate 200.

[0069] In one embodiment of the present application, referring to FIG. 2 , FIG. 4 , and FIG. 5 to FIG. 8 , the axial length of the first section 210 is defined as L1 , and the axial length of the valve plate 200 is defined as L, satisfying 0.2≤L1 / L≤0.8.

[0070] It can be seen from the above-mentioned embodiment that the first section 210 is located on the side of the second section 220 close to the folded edge 120, and the avoidance gap 201 is formed between the outer periphery of the first section 210 and the end face of the second section 220. It can be understood that the axial length L1 of the first section 210 is equivalent to the axial length dimension of the avoidance gap 201. For the valve plate 200, the part of the valve plate 200 that is first subjected to the extrusion force of the folded edge 120 is at the axial position L1.

[0071] In actual application, the position of the valve plate 200 that is first subjected to the extrusion force of the folded edge 120 in the axial direction of the valve plate 200 cannot be too close to the axial ends of the valve plate 200. If the force-bearing part is too close to the left end face (the direction in the figure), the middle area of ​​the valve plate 200 is likely to convexly deform toward the valve plate 300. If the force-bearing part is too close to the right end face (the direction in the figure), the middle area of ​​the valve plate 200 is likely to be concavely deformed away from the valve plate 300. Based on this, this embodiment sets the axial length L1 of the first section 210 and the axial length L of the valve plate 200 to satisfy 0.2≤L1 / L≤0.8 to prevent the valve plate 200 from deforming and improve the sealing ability of the valve plate 200 and the valve plate 300.

[0072] The ratio of the axial length L1 of the first section 210 to the axial length L of the valve plate 200 can be determined according to actual conditions, such as 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, or 0.8. For example, the axial length L1 of the first section 210 and the axial length L of the valve plate 200 satisfy the following relationship: L1 / L=0.5. In this case, the portion of the valve plate 200 that is first subjected to the extrusion force of the folded edge 120 is located in the middle of the axial direction of the valve plate 200. In this manner, the deformation of the valve plate 200 is minimized, and the sealing capability with the valve disc 300 is enhanced.

[0073] In one embodiment of the present application, please refer to Figures 5 to 8. The shape structure of the avoidance gap 201 can be determined according to actual conditions. From the aforementioned embodiment, it can be seen that the avoidance gap 201 is formed between the outer periphery of the first section 210 and the end face of the second section 220. Therefore, the shape structure of different avoidance gaps 201 can be adjusted by changing the shape structure of the outer peripheral wall of the first section 210.

[0074] 5 , the outer peripheral wall of the first section 210 is a cylindrical surface. In this embodiment, the first section 210 is a cylindrical structure, and the first section 210 and the second section 220 form a stepped structure. In this case, the avoidance gap 201 is a stepped gap structure.

[0075] As an example, referring to Figure 6 , the outer peripheral wall of the first section 210 is a tapered surface. In this embodiment, the first section 210 is a tapered structure, with the outer diameter of the first section 210 gradually increasing toward the second section 220. In this embodiment, the avoidance notch 210 is an obliquely angled notch. In this embodiment, the outer peripheral surface of the first section 210 can be a chamfered feature from the end surface of the first section 210 to the end surface of the second section 220, or it can be a simple beveled feature.

[0076] As an example, referring to Figures 7 and 8 , the outer peripheral wall of the first section 210 is an arc-shaped surface. In this embodiment, the first section 210 has a conical structure with an arc-shaped outer peripheral surface. The outer diameter of the first section 210 increases toward the second section 220. In this case, the avoidance notch 210 has an arc-shaped notch structure. In this embodiment, the outer peripheral surface of the first section 210 can be a rounded feature from the end surface of the first section 210 to the end surface of the second section 220, or can be a partial arc feature.

[0077] In one embodiment of the present application, referring to Figures 2 and 4 , the edge of the end surface of the first section 210 facing away from the second section 220 is chamfered. In this embodiment, the chamfered edge of the end surface of the first section 210 facing away from the second section 220 further avoids the folded edge 120 and prevents interference between the folded edge 120 and the valve plate 200. In one embodiment, the inclined surface of the end surface of the first section 210 facing away from the second section 220 may or may not contact the folded edge 120, as long as no resistance is applied to the folded edge 120.

[0078] In one embodiment of the present application, referring to FIG. 5 to FIG. 8 , a plurality of hollow holes 202 are provided, and the plurality of hollow holes 202 are spaced and evenly arranged along the circumference of the valve plate 200 .

[0079] In this embodiment, the provision of multiple hollow holes 202 increases fluid throughput and improves exhaust efficiency. Furthermore, the multiple hollow holes 202 are spaced and evenly spaced along the circumference of the valve plate 200. This allows the fluid passing through the hollow holes 202 to exert a uniform force on the valve disc 300, resulting in a more balanced force on the valve disc 300. This prevents deflection of the valve disc 300, further ensures the sliding stability of the valve disc 300, and prevents the valve disc 300 from getting stuck.

[0080] As an example, the hollow hole 202 can be set as a waist-shaped hole.

[0081] This application also proposes a scroll compressor, as shown in FIG9 . The scroll compressor includes a housing 500 and an exhaust check valve. The specific structure of the exhaust check valve is similar to that of the aforementioned embodiments. Since this scroll compressor utilizes all of the technical solutions of all of the aforementioned embodiments, it at least possesses all of the beneficial effects provided by the technical solutions of the aforementioned embodiments, and therefore, no further description is given here. The housing 500 is provided with an exhaust port 501, and the exhaust check valve is mounted at the exhaust port 501.

[0082] In one embodiment, a main frame and a drive motor are fixed inside the housing 500. The drive motor is connected to the crankshaft, and the upper end of the crankshaft is connected to the movable scroll. The main frame is fixed with a fixed scroll opposite to the movable scroll. The fixed scroll and the movable scroll cooperate to form a plurality of compression chambers. When the scroll compressor is working, the crankshaft is driven to rotate by the drive motor, which in turn drives the movable scroll to rotate relative to the fixed scroll to achieve the suction, compression and discharge of the refrigerant. The exhaust check valve is installed at the exhaust port 501, which can effectively prevent the high-pressure fluid from flowing back into the scroll compressor, and can avoid the problem of the compressor being difficult to start again when it is restarted in a short time.

[0083] This application also provides a refrigeration device including a scroll compressor. The specific structure of the scroll compressor is similar to that of the above-mentioned embodiments. Since this refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. In one embodiment, the refrigeration device can be an air conditioner, a refrigerator, or cold chain transportation equipment, etc.

[0084] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An exhaust check valve, wherein: The exhaust check valve comprises: A valve seat, provided with a valve cavity and a first port and a second port communicated with the valve cavity, wherein the valve seat is provided with a limiting step and a folded edge opposite to the limiting step at the first port; A valve plate is installed at the first port, a side of the valve plate close to the folded edge is provided with an avoidance notch, and the valve plate is provided with a hollow hole penetrating through both sides of the axial direction; and The valve sheet is slidably disposed in the valve cavity and is located on a side of the valve plate away from the folded edge. The valve sheet can move away from or close to the valve plate to open or block the hollow hole.

2. The exhaust check valve according to claim 1, wherein: The avoidance notch is arranged at the connection between the axial end surface and the outer peripheral surface of the valve plate.

3. The exhaust check valve according to claim 1 or 2, wherein: The avoidance notch is arranged around the outer periphery of the valve plate.

4. The exhaust check valve according to any one of claims 1 to 3, wherein: The valve plate comprises a first section and a second section connected in the axial direction, wherein the outer diameter of the first section is smaller than the outer diameter of the second section to form the avoidance gap; The edge of the second section close to the first section abuts against the folded edge, and the side of the second section away from the first section abuts against the limiting step.

5. The exhaust check valve according to claim 4, wherein: The axial length of the first section is defined as L1, and the axial length of the valve plate is defined as L, satisfying 0.2≤L1 / L≤0.

8.

6. The exhaust check valve according to claim 5, wherein: Satisfies: L1 / L=0.

5.

7. The exhaust check valve according to any one of claims 4 to 6, wherein: The folded edge is annular, and is bent and extended from the valve seat toward the central axis of the valve plate. An edge of the second section close to one side of the first section is provided with an inclined surface matched with the folded edge.

8. The exhaust check valve according to any one of claims 4 to 7, wherein: The outer peripheral wall of the first section is a cylindrical surface; Or, the outer peripheral wall of the first section is a conical surface; Alternatively, the outer peripheral wall of the first section is an arc surface.

9. The exhaust check valve according to any one of claims 1 to 8, wherein: A guide boss is provided at one end of the valve plate away from the folded edge, and the guide boss cooperates with the inner wall of the valve cavity.

10. The exhaust check valve according to any one of claims 1 to 9, wherein: A plurality of hollow holes are provided, and the plurality of hollow holes are spaced and evenly arranged along the circumference of the valve plate.

11. The exhaust check valve according to any one of claims 1 to 10, wherein: The exhaust check valve further includes an exhaust pipe connected to the second port.

12. A scroll compressor, wherein: The scroll compressor comprises a housing and the exhaust check valve according to any one of claims 1 to 11, wherein the housing is provided with an exhaust port, and the exhaust check valve is installed at the exhaust port.

13. A refrigeration device, wherein: The refrigeration device comprises the scroll compressor according to claim 12.

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