Exhaust check valve, scroll compressor and refrigeration equipment

Abstract

The invention discloses an exhaust check valve, a scroll compressor and refrigeration equipment. The exhaust check valve comprises a valve seat, a valve plate and a valve block, the valve seat is provided with a valve cavity, a first port and a second port, the first port and the second port are communicated with the valve cavity, and a limiting step and a folded edge opposite to the limiting step are arranged at the position, at the first port, of the valve seat; the valve plate is installed at the first port, an avoiding notch is formed in the side, close to the folded edge, of the valve plate, and a hollow hole penetrating through the two axial sides is formed in the valve plate. The valve plate is arranged in the valve cavity in a sliding mode and located on the side, away from the folded edge, of the valve plate, and the valve plate can move away from or close to the valve plate to open or block the hollowed-out hole. According to the technical scheme, the deformation degree of the valve plate in the assembling process can be reduced, then the deformation degree of the contact face of the valve plate and the valve plate can be reduced, the sealing capacity of the valve plate and the valve plate is improved, and then leakage noise generated when the compressor is shut down can be reduced.

Description

Technical Field

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

[0002] The low-pressure scroll compressor usually includes a moving scroll and a fixed scroll for compressing the working fluid. During normal operation, the refrigerant enters the shell through the suction pipe, is compressed by the pump body and discharged from the upper shell, and enters the air conditioning system to form a cycle. When the compressor is used in the system, if it is shut down in an emergency, the high-pressure refrigerant will flow back into the compressor. If the compressor is restarted in a short period of time, it will bring serious hidden dangers due to the large pressure difference.

[0003] In the related art, scroll compressors effectively prevent the backflow of high-pressure gas by providing an exhaust check valve. However, the existing exhaust check valve may have a poor seal between the valve sheet and the valve plate when shut down, resulting in shutdown noise problems. Summary of the invention

[0004] The main purpose of the present invention is to provide an exhaust check valve, which aims to improve the sealing ability between the valve sheet and the valve plate and reduce the shutdown noise of the compressor.

[0005] To achieve the above object, the exhaust check valve proposed by the present invention comprises:

[0006] 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;

[0007] 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

[0008] 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.

[0009] 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.

[0010] In one embodiment of the present application, the avoidance gap is arranged around the outer periphery of the valve plate.

[0011] 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;

[0012] 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.

[0013] 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.

[0014] In an 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.

[0015] 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, and the edge of the second section close to the first section is provided with a slope matching the folded edge.

[0016] In one embodiment of the present application, the outer peripheral wall of the first section is a cylindrical surface;

[0017] Or, the outer peripheral wall of the first section is a conical surface;

[0018] Alternatively, the outer peripheral wall of the first section is an arc surface.

[0019] 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.

[0020] 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.

[0021] In one embodiment of the present application, an exhaust pipe connected to the second port is also included.

[0022] To achieve the above object, the present application also provides a scroll compressor, comprising a housing and the above 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:

[0023] 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;

[0024] 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

[0025] 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.

[0026] To achieve the above objectives, the present application also provides a refrigeration device, including the above scroll compressor.

[0027] In the exhaust check valve of the technical solution of the present invention, the valve seat is provided with a valve cavity and a first port and a second port connected to the valve cavity, the valve plate is installed at the first port, and the valve plate is provided with a hollow hole that passes through both sides of the axial direction, and the valve plate can move away from or close to the valve plate in the valve cavity to open or block the hollow hole, so as to realize the function of the exhaust check valve to exhaust smoothly and prevent the backflow of high-pressure gas during shutdown. By setting a limiting step and a folding edge at the first port, a mounting position for installing the valve plate is formed between the folding edge and the limiting step. By setting an avoidance notch on one side of the valve plate close to the folding edge, the part where the valve plate and the folding edge are abutted is located between the two axial end faces of the valve plate, thereby reducing the degree of deformation of the valve plate during assembly, and further reducing the degree of deformation of the contact surface between the valve plate and the valve plate, improving the sealing ability of the valve plate and the valve plate, and further reducing the leakage noise when the compressor is shut down. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of an embodiment of an exhaust check valve of the present invention;

[0030] Figure 2 for Figure 1 A partial enlarged view of the M in the middle;

[0031] Figure 3 It is a schematic structural diagram of another embodiment of the exhaust check valve of the present invention;

[0032] Figure 4 for Figure 3 A local enlarged view of the N position in the middle;

[0033] Figure 5 It is a structural schematic diagram of an embodiment of a valve plate in the present invention;

[0034] Figure 6 It is a structural schematic diagram of another embodiment of the valve plate in the present invention;

[0035] Figure 7 It is a structural schematic diagram of another embodiment of the valve plate in the present invention;

[0036] Figure 8 It is a structural schematic diagram of another embodiment of the valve plate in the present invention;

[0037] Fig. 9It is a schematic diagram of the structure in which the exhaust check valve of the present invention is installed on the scroll compressor.

[0038] Description of Figure Numbers:

[0039]

[0040]

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

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

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication 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 a 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 invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting 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 the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present invention proposes an exhaust check valve, which aims to set an avoidance notch on the valve plate so that the force-bearing area of ​​the valve plate affected by the folded edge of the valve seat is offset from the end of the valve plate toward the middle part of the valve plate in the thickness direction of the valve plate, 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 sheet, improving the sealing ability between the valve plate and the valve sheet, and reducing the shutdown noise of the compressor.

[0047] In the embodiment of the present invention, Figures 1 to 5 As shown, the exhaust check valve includes a valve seat 100 , a valve plate 200 and a valve sheet 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 abutted 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 the two axial sides; the valve plate 300 is slidably arranged in the valve cavity 100A and is located on the side of the valve plate 200 away from the folded edge 120, and the valve plate 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 is a hollow columnar structure, and a valve cavity 100A is formed inside it, and the valve cavity 100A can be set as a cylindrical cavity. The first port 101 and the second port 102 connected to the valve cavity 100A are respectively provided on opposite sides of the valve seat 100, wherein the first port 101 is used to install the valve plate 200, and the first port 101 can be connected to the shell of the compressor, and the second port 102 is used to connect 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 the conventional connection method, which will not be repeated here. The valve plate 200 is provided with a hollow hole 202 which passes through both sides of the axial direction. 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 exhaust smoothly and prevent the backflow of high-pressure gas during shutdown.

[0050] In this embodiment, the valve seat 100 is provided with a limiting step 110 and a folded edge 120 at the first port 101, 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 hold 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, and the force of the folded edge 120 on the valve plate 200 can be decomposed into an axial extrusion force and a radial extrusion force on the valve plate 200, wherein 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 offset each other, 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 sheet 300. Based on this, the present invention The embodiment provides an avoidance notch 201 on one side of the valve plate 200 close to the folded edge 120, so that during assembly, when the valve plate 200 is abutted against the limiting step 110, the portion of the valve plate 200 that is first squeezed during the bending process of the folded edge 120 toward the valve plate 200 is closer to the middle position of the thickness of the valve plate 200 than the portion 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 sheet 300 can be reduced, thereby improving the sealing ability of the valve sheet 300 and the valve plate 200, and thereby reducing the leakage noise when the compressor is stopped.

[0051] It should be noted that the purpose of setting the avoidance notch 201 on the side of the valve plate 200 close to the folded edge 120 of the present embodiment is to transfer the stress area of ​​the valve plate 200 during the riveting assembly process from the axial end of the valve plate 200 to the middle position close to the axial direction of the valve plate 200, so as to reduce the stress deformation degree of the valve plate 200. In practical applications, the shape and structure of the avoidance notch 201 can be determined according to actual conditions, such as a step notch, a circular notch, an arc notch, a triangular notch or other special-shaped notches, etc.

[0052] As an example, as shown in the following table, a flatness simulation test is performed on the contact surface between the valve plate 200 and the valve plate 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]

[0054] It can be seen that the technical solution of the present invention can significantly reduce the deformation of the contact surface between the valve plate 200 and the valve sheet 300 after riveting, thereby improving the sealing ability between the valve sheet 300 and the valve plate 200.

[0055] In practical applications, 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 convexly provided from the valve seat 100 toward the valve cavity 100A, or a step structure concavely provided by the inner wall of the valve seat 100, etc. The specific structure is not limited here, as long as it can ensure the limiting installation of the valve plate 200.

[0056] As an example, the folded edge 120 is connected to the end of the valve seat 100, and the folded edge 120 can be an integral structure with the valve seat 100. The folded edge 120 can be a sheet metal part.

[0057] In the exhaust check valve of the technical solution of the present invention, 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, and 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 as to realize the function of the exhaust check valve to exhaust smoothly and prevent the high-pressure gas from flowing back during shutdown. By setting 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 one side of the valve plate 200 close to the folded edge 120, the portion where the valve plate 200 and the folded edge 120 are abutted against each other is located between the two axial end faces of the valve plate 200, thereby reducing the deformation degree of the valve plate 200 during the assembly process, and further reducing the deformation degree of the contact surface between the valve plate 200 and the valve sheet 300, thereby improving the sealing ability of the valve sheet 300 and the valve plate 200, and further reducing the leakage noise when the compressor is shut down.

[0058] In one embodiment of the present application, please refer to Figure 2 , Figure 4 as well as Figures 5 to 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 .

[0059] It can be understood that in the actual assembly process, the folded edge 120 is bent 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.

[0060] It should be noted that if the avoidance notch 201 is provided alone on the axial end face of the valve plate 200, the folded edge 120 will still first squeeze the edge of the axial end face of the valve plate 200 when it bends from the valve seat 100 toward the valve plate 200, which will still cause a large deformation of the valve plate 200. Similarly, if the avoidance notch 201 is provided alone on the outer peripheral surface of the valve plate 200, the folded edge 120 will still first squeeze the edge of the axial end face of the valve plate 200 when it bends from the valve seat 100 toward the valve plate 200, which will still cause a large deformation of the valve plate 200.

[0061] In practical applications, the avoidance gap 201 may be an annular gap structure surrounding the outer periphery of the valve plate 200, or may be a scattered gap structure intermittently arranged at the edge of the valve plate 200, or may be a gap structure arranged at a certain position of the edge of the valve plate 200, etc. It can be understood that the different structural modes of the avoidance gap 201 can be determined according to the structure of the folding edge 120, such as the folding edge 120 can be an annular folding edge structure, a scattered folding edge structure or a folding edge structure at a specific position, etc., which can be determined according to actual conditions.

[0062] As an example, the avoidance notch 201 is arranged around the outer periphery of the valve plate 200 .

[0063] 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 is 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.

[0064] In one embodiment of the present application, please refer to Figure 2 , Figure 4 as well as Figures 5 to 8The valve plate 200 includes a first section 210 and a second section 220 connected along the axial direction. 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 abuts against the folded edge 120, and the side of the second section 220 away from the first section 210 abuts against the limiting step 110.

[0065] This embodiment illustrates the structure of the valve plate 200 by way of example. The valve plate 200 includes a first section 210 and a second section 220 connected to each other. The outer diameter of the first section 210 near the folding edge 120 is smaller than the outer diameter of the second section 220 near the limiting step 110. Thus, the first section 210 and the second section 220 are connected to form an avoidance gap 201. That is, along the axial direction from left to right (the direction in the figure), the avoidance gap 201 is located on the left side of the second section 220, and the edge of the second section 220 is closer to the middle position of the valve plate 200 in the axial direction. Then, during the assembly process, the folding edge 120 bends toward the valve plate 200, and will cross the position of the avoidance gap 201 and first squeeze the edge of the second section 220. Thus, the position where the valve plate 200 is squeezed is closer to the middle position of the valve plate 200 in the axial direction, thereby reducing the deformation degree of the valve plate 200. Accordingly, the side of the second section 220 away from the first section 210 is limited against the limiting step 110.

[0066] For further information, see Figure 2 and Figure 4 The end of the valve 200 away from the folding edge 120 is provided with a guide boss 221, and the guide boss 221 cooperates with the inner wall of the valve cavity 100A to play a role of radial limiting and guiding assembly, thereby improving assembly efficiency. As an example, the guide boss 221 is provided on the side of the second section 220 away from the first section 210.

[0067] 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.

[0068] In one embodiment of the present application, the folded edge 120 is annular 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 .

[0069] 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, so as to increase the abutment and fitting area between the folded edge 120 and the second section 220, so that the force on the valve plate 200 is more uniform, and the degree of deformation of the valve plate 200 due to force is further reduced.

[0070] In one embodiment of the present application, please refer to Figure 2 , Figure 4 as well as Figures 5 to 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.

[0071] It can be seen from the above-mentioned embodiments 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.

[0072] 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 surface (the direction in the figure), the middle area of ​​the valve plate 200 is easy to convexly deform toward the valve plate 300. If the force-bearing part is too close to the right end surface (the direction in the figure), the middle area of ​​the valve plate 200 is easy 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.

[0073] 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, etc. As an example, the axial length L1 of the first section 210 and the axial length L of the valve plate 200 satisfy: L1 / L=0.5. At this time, the part of the valve plate 200 that is first subjected to the extrusion force of the folded edge 120 is in the middle position of the axial direction of the valve plate 200. In this way, the deformation degree of the valve plate 200 is smaller, and the sealing ability of the valve plate 200 in cooperation with the valve plate 300 is stronger.

[0074] 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. It can be seen from the above-mentioned embodiments 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.

[0075] As an example, see Figure 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. At this time, the avoidance gap 201 is a gap structure in the shape of a step.

[0076] As an example, see Figure 6 , the outer peripheral wall of the first section 210 is a conical surface. In this embodiment, the first section 210 is a conical structure, and the outer diameter of the first section 210 gradually increases toward the direction of the second section 220. At this time, the avoidance notch 210 is a notch structure with an oblique angle. In this way, the outer peripheral surface of the first section 210 can be a chamfer feature from the end face of the first section 210 to the end face of the second section 220, or can be a simple inclined surface feature, etc.

[0077] As an example, see Figure 7 and Figure 8 , the outer peripheral wall of the first section 210 is an arc surface. In this embodiment, the first section 210 is a conical structure with an outer peripheral surface being an arc surface, and the outer diameter of the first section 210 increases toward the direction of the second section 220. At this time, the avoidance notch 210 is a notch structure with an arc shape. In this way, the outer peripheral surface of the first section 210 can be a rounded feature from the end face of the first section 210 to the end face of the second section 220, or can be a partial arc feature, etc.

[0078] In one embodiment of the present application, please refer to Figure 2 and Figure 4 , the edge of the end surface of the first section 210 away from the second section 220 is chamfered. In this embodiment, by chamfering the edge of the end surface of the first section 210 away from the second section 220, it is further played to avoid the folding edge 120, and prevent the folding edge 120 from interfering with the assembly of the valve plate 200. Optionally, the inclined surface of the end surface of the first section 210 away from the second section 220 can be in contact with the folding edge 120 or not, as long as no resistance force is generated on the folding edge 120.

[0079] In one embodiment of the present application, please refer to Figures 5 to 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 .

[0080] In this embodiment, by providing a plurality of hollow holes 202, the fluid flux can be increased and the exhaust efficiency can be improved. In addition, the plurality of hollow holes 202 are spaced and evenly arranged along the circumference of the valve plate 200, so that the fluid can evenly exert force on the valve plate 300 after passing through the hollow holes 202, so that the force on the valve plate 300 is more balanced, the valve plate 300 can be prevented from being deflected, the sliding stability of the valve plate 300 can be further ensured, and the valve plate 300 can be further prevented from being stuck.

[0081] As an example, the hollow hole 202 can be set as a waist-shaped hole.

[0082] The present invention also provides a scroll compressor, see Fig. 9 The scroll compressor includes a housing 500 and an exhaust check valve. The specific structure of the exhaust check valve refers to the above embodiment. Since the scroll compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the housing 500 is provided with an exhaust port 501, and the exhaust check valve is installed at the exhaust port 501.

[0083] Optionally, a main frame and a driving motor are fixed inside the housing 500, the driving motor is connected to the crankshaft, the upper end of the crankshaft is connected to a movable scroll, the main frame is fixed with a fixed scroll opposite to the movable scroll, and the fixed scroll cooperates with the movable scroll to form a plurality of compression chambers. When the scroll compressor is working, the crankshaft is driven to rotate by the driving motor, and then the movable scroll can be driven 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 backflowing into the scroll compressor, and can avoid the problem of the compressor being difficult to start when it is restarted in a short time.

[0084] The present invention further proposes a refrigeration device, which includes a scroll compressor. The specific structure of the scroll compressor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Optionally, the refrigeration device can be an air conditioner, a refrigerator, or cold chain transportation equipment, etc.

[0085] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An exhaust check valve, characterized in that: include: 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, characterized in that: 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 2, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: Satisfies: L1 / L=0.

5.

7. The exhaust check valve according to claim 4, characterized in that: 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 claim 4, characterized in that: 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 claim 1, characterized in that: 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 claim 1, characterized in that: 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 claim 1, characterized in that: Also included is an exhaust pipe connected to the second port.

12. A scroll compressor, characterized in that: It comprises a shell and the exhaust check valve according to any one of claims 1 to 11, the shell is provided with an exhaust port, and the exhaust check valve is installed at the exhaust port.

13. A refrigeration device, characterized in that: Comprising the scroll compressor of claim 12.

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