Valve assembly, method of manufacturing valve plate, and scroll compressor

Abstract

The present application relates to scroll compressor technical field, especially valve assembly, valve piece's manufacturing method and scroll compressor, valve assembly's structure includes valve seat, stopper, is fixed in valve seat, valve piece, including metal base, the metal base includes positioning part and activity part, the metal base is installed in the valve seat through the positioning part, the activity part moves between the stopper and the valve seat, and thinning cavity is arranged in the activity part, the thickness of the position of the activity part provided with thinning cavity is less than the thickness of the positioning part, and the thinning cavity covers at least one of the exhaust hole and the pressure relief hole of the fixed scroll plate. The valve assembly, the manufacturing method of valve piece and scroll compressor can solve the problem that the response speed of the existing valve assembly is slow, and the opening and closing delay is prone to occur.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and in particular to a valve assembly, a valve plate manufacturing method, and a scroll compressor. Background Technology

[0002] Scroll compressors are a type of compressor commonly used in air conditioning, refrigeration equipment, and heat pump systems. They are widely used due to their compact structure, stable operation, and high efficiency. High-speed compressors can achieve essentially the same output capacity as high-displacement designs with lower displacement designs, and are smaller and less expensive, making them widely used in the refrigeration industry.

[0003] As a key component in scroll compressors, the valve assembly's opening and closing performance directly affects the compressor's discharge efficiency, energy consumption, and operational reliability. In existing valve assemblies, the uniform thickness of the valve plates results in a slow response speed and a tendency for opening and closing lag. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a valve assembly, a valve plate manufacturing method and a scroll compressor to solve the problem that the existing valve assembly has a slow response speed and is prone to opening and closing delay.

[0005] According to a first aspect of the present invention, a valve assembly is provided, wherein the valve assembly includes: a valve seat; a limiter fixed to the valve seat; a valve plate including a metal substrate, the metal substrate including a positioning portion and a movable portion, the metal substrate being mounted to the valve seat via the positioning portion, the movable portion being movable between the limiter and the valve seat; and a thinning cavity disposed in the movable portion, the thickness of the movable portion at the location where the thinning cavity is disposed being less than the thickness of the positioning portion, the thinning cavity at least covering one of the exhaust port and the pressure relief port of the fixed scroll plate.

[0006] Preferably, the thinning cavity is disposed on one or more of the upper and lower surfaces of the movable part.

[0007] Preferably, the total depth of the thinning cavity is 0.03% to 1% of the thickness of the metal substrate.

[0008] Preferably, the valve plate further includes a wear-resistant coating disposed within the thinning cavity, the wear-resistant coating comprising one of a graphite coating, a DLC coating, and a MoS2 coating.

[0009] Preferably, the valve plate further includes an adhesive layer disposed between the wear-resistant coating and the thinning cavity. The adhesive layer includes one of Cr, Ti, and a resin binder. The sum of the thicknesses of the wear-resistant coating and the adhesive layer is not less than the depth of the thinning cavity.

[0010] Preferably, the thinning cavity is made by laser etching or chemical etching, so that the surface of the thinning cavity has a microporous structure, and the wear-resistant coating and the adhesive layer can be embedded in the microporous structure.

[0011] Preferably, a transition edge is formed at the junction of the thinning cavity and the metal substrate, and the wear-resistant coating extends to cover the transition edge.

[0012] According to a second aspect of the present invention, a method for manufacturing a valve plate is provided, wherein the method is used to manufacture a valve plate in a valve assembly as described above, and the method includes the following steps: Step 1, cleaning the surface of the metal substrate; Step 2, forming the thinning cavity on the surface of the metal substrate, and controlling the process parameters to make the surface roughness Ra of the metal substrate 1.5μm-3μm; Step 3, depositing the adhesion layer in the thinning cavity of the metal substrate using a deposition method; Step 4, depositing the wear-resistant coating on the adhesion layer using a deposition method or a spraying method; Step 5, performing low-temperature annealing on the valve plate; Step 6, performing surface passivation treatment on the valve plate; Step 7, performing micro-polishing treatment on the valve plate.

[0013] Preferably, the manufacturing method of the valve plate further includes: step eight, performing an adhesion test on the wear-resistant coating, wherein the adhesion test is performed by cross-cutting method, and if the peeling area at the cross-cutting point is less than 5%, it is a qualified product.

[0014] According to a third aspect of the invention, a scroll compressor is provided, wherein the scroll compressor includes the valve assembly described above.

[0015] The valve assembly, valve plate manufacturing method, and scroll compressor of this invention, wherein the metal substrate of the valve plate includes a positioning part and a movable part. The metal substrate is mounted on the valve seat via the positioning part, and the movable part of the metal substrate moves between a limiter and the valve seat. A thinning cavity is disposed in the movable part, and the thickness of the movable part at the location where the thinning cavity is disposed is less than the thickness of the positioning part, so that the mass of the movable part is less than the mass of the positioning part, thereby enhancing the elastic deformation capability and response speed of the movable part. The thinning cavity at least covers one of the exhaust port and the pressure relief port of the fixed scroll plate, so that the movable part can maintain stable opening and closing characteristics even under high-speed operating conditions, reducing hysteresis and impact, thereby improving the reliability and efficiency of the exhaust or pressure relief process. This effectively solves the problem of slow response speed and easy opening and closing hysteresis in existing valve assemblies.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a first embodiment of a scroll compressor according to the present invention.

[0019] Figure 2 This is a schematic diagram of a second embodiment of the scroll compressor according to the present invention.

[0020] Figure 3 This is a schematic diagram of a valve assembly according to a first embodiment of a scroll compressor of the present invention.

[0021] Figure 4 It is based on the present invention Figure 3 A magnified view of a portion of the image.

[0022] Reference numerals: 1-valve seat; 2-limiter; 20-sloping surface; 3-valve plate; 30-metal substrate; 31-positioning part; 32-moving part; 33-wear-resistant coating; 34-adhesion layer; 35-microporous structure; 4-thinning cavity; 40-transition edge; 5-fixed vortex disk; 51-exhaust port; 52-compression cavity; 6-guide post. Detailed Implementation

[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0027] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0028] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0032] like Figures 1 to 4 As shown, according to a first aspect of the present invention, a valve assembly is provided, the valve assembly including a valve seat 1, a limiter 2, a valve plate 3, and a thinning chamber 4.

[0033] In the following description, reference will be made to Figures 1 to 4 The specific structure of the valve assembly and the connection relationship of the aforementioned components are described in detail.

[0034] like Figures 1 to 4 As shown, in this embodiment, the limiter 2 is fixed to the valve seat 1, and the limiter 2 is used to limit the valve plate 3. The valve plate 3 includes a metal substrate 30, which includes a positioning part 31 and a movable part 32. The metal substrate 30 is mounted on the valve seat 1 through the positioning part 31, and the movable part 32 of the metal substrate 30 moves between the limiter 2 and the valve seat 1. A thinning cavity 4 is disposed in the movable part 32, and the thickness of the movable part 32 at the location where the thinning cavity 4 is disposed is less than the thickness of the positioning part 31, so that the mass of the movable part 32 is less than the mass of the positioning part 31, thereby enhancing the elastic deformation capability and response speed of the movable part 32. The thinning cavity 4 covers at least one of the exhaust port 51 and the pressure relief port of the fixed scroll plate 5. This arrangement allows the movable part 32 to maintain stable opening and closing characteristics even under high-speed operating conditions, reducing hysteresis and impact, thereby improving the reliability and efficiency of the exhaust and pressure relief process of the scroll compressor.

[0035] Preferred, such as Figure 1 and Figure 2As shown, in this embodiment, the valve assembly is disposed on the top of the fixed scroll plate 5 of the scroll compressor. The valve seat 1 can be a part of the fixed scroll plate 5 (e.g., the valve seat 1 is the base plate of the fixed scroll plate 5), or it can be a separately disposed component. The movable part 32 of the valve plate 3 moves between the valve seat 1 and the limiter 2, so that the valve plate 3 can respond to the pressure change of the exhaust port 51 or the pressure relief port. The exhaust port 51 is connected to the middle of the scroll of the compression chamber 52, which is formed by the meshing of the fixed scroll plate 5 and the moving scroll plate. In the radial direction, the pressure gradually decreases from both sides of the compression chamber 52 to the middle of the compression chamber 52 to form an intermediate compression chamber 52. The top of the fixed scroll plate 5 is provided with a pressure relief port (not shown) at the position corresponding to the intermediate compression chamber 52.

[0036] During use, the thinning cavity 4 of the valve plate 3 can cover only one of the exhaust hole 51 or the pressure relief hole, or it can cover both the exhaust hole 51 and the pressure relief hole at the same time (it should be noted that the covering means that when the valve plate 3 stops moving, the projection of the thinning cavity 4 on the horizontal plane can cover the projection of the exhaust hole 51 or the pressure relief hole on the horizontal plane), thereby ensuring that the valve plate 3 can quickly respond to pressure changes during exhaust or pressure relief.

[0037] Furthermore, preferably, in such cases Figure 1 In the illustrated embodiment, the valve seat 1 is the base plate of the fixed scroll plate 5. The first end of the limiter 2 (e.g.) Figure 1 The left end shown is fixed to the valve seat 1 by bolts, and the second end of the limiter 2 (as shown) Figure 1 The bottom of the valve plate 3 (shown on the right end) has a slope 20, and a gap is provided between the slope 20 and the valve seat 1. The positioning part 31 of the metal base 30 of the valve plate 3 is provided at the bottom of the first end of the limiter 2, and the positioning part 31 is fixed to the valve seat 1 by bolts. The movable part 32 of the metal base 30 is provided between the slope 20 and the valve seat 1 (that is, the thinning cavity 4 is located between the slope 20 and the valve seat 1). When the vent hole 51 vents or the pressure relief hole relieves pressure, the movable part 32 moves between the slope 20 and the valve seat 1. Since the thinning cavity 4 reduces the mass of the movable part 32, the elastic deformation capability of the movable part 32 is enhanced, thereby enabling the valve plate 3 to respond quickly to pressure changes.

[0038] Further optimization, in such Figure 2In the illustrated embodiment, the valve seat 1 is the base plate of the fixed scroll plate 5. The two ends of the limiter 2 are fixed above the valve seat 1 by screws and guide posts 6. The valve plate 3 is movably disposed between the limiter 2 and the valve seat 1. Specifically, the two ends of the metal substrate 30 of the valve plate 3 are formed as positioning portions 31. Through holes are provided on the positioning portions 31, and two guide posts 6 are respectively inserted through the two through holes, allowing the metal substrate 30 to move along the extension direction of the guide posts 6. The movable portion 32 is disposed in the middle of the metal substrate 30 (i.e., between the two positioning portions 31), and the thinning cavity 4 is disposed on the movable portion 32, allowing the thinning cavity 4 to cover the exhaust port 51 and / or the pressure relief port. When the exhaust port 51 vents or the pressure relief port relieves pressure, the metal substrate 30 moves between the limiter 2 and the valve seat 1. Because the thinning cavity 4 reduces the mass of the movable portion 32, the elastic deformation capability of the movable portion 32 is enhanced, thereby enabling the valve plate 3 to respond quickly to pressure changes.

[0039] Preferably, in this embodiment, the thinning cavity 4 can be disposed throughout the entire movable portion 32. However, it is not limited to this; the thinning cavity 4 can also be disposed only in a portion of the movable portion 32, which can reduce the manufacturing cost of the metal substrate 30 of the valve plate 3. In this case, the thinning cavity 4 needs to cover at least one of the exhaust port 51 and the pressure relief port to ensure that the valve plate 3 can respond quickly to pressure changes. The metal substrate 30 can be made of stainless steel, but is not limited to this; as long as the metal substrate 30 can simultaneously possess deformability and impact resistance, it can also be made of other metals.

[0040] Preferably, in this embodiment, the depth of the thinning cavity 4 is 0.03% to 1% (inclusive) of the thickness of the metal substrate 30. This configuration ensures the responsiveness of the movable part 32 while preventing excessive thinning of the metal substrate 30, which could lead to low bending stiffness and fatigue resistance, consequently causing cracks and eventual fracture of the metal substrate 30 under impact loads. Further, preferably, the thickness of the metal substrate 30 can be 0.3mm to 0.6mm (inclusive), and the depth of the thinned portion can be 0.2μm to 3μm (inclusive).

[0041] In a more preferred embodiment, the thinning cavity 4 can be disposed on one or more of the upper and lower surfaces of the movable part 32. That is, the thinning cavity 4 can be disposed on only the upper or lower surface of the movable part 32, or it can be disposed on both the upper and lower surfaces of the movable part 32. Wherein, when the thinning cavity 4 is disposed on both the upper and lower surfaces of the movable part 32, the total depth of the thinning cavity 4 is 0.03% to 1% of the thickness of the metal substrate 30, so as to ensure the bending stiffness and fatigue resistance of the metal substrate 30.

[0042] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the thinning cavity 4 can be fabricated using mechanical processes (e.g., milling or laser etching) or chemical etching. The valve plate 3 may include a wear-resistant coating 33 disposed within the thinning cavity 4. The wear-resistant coating 33 is made of a different material than that of the limiter 2 and the valve seat 1, thereby reducing the noise generated when the valve plate 3 impacts the limiter 2 and the valve seat 1, and reducing the impact load borne by the limiter 2 and the valve seat 1.

[0043] Furthermore, preferably, the wear-resistant coating 33 includes one of a graphite coating, a DLC coating, and a MoS2 coating, enabling the wear-resistant coating 33 to simultaneously possess high wear resistance, a low coefficient of friction, chemical stability, and adaptability to extreme working conditions. The thickness of the wear-resistant coating 33 can be consistent with the depth of the thinning cavity 4 to avoid excessive internal stress leading to detachment due to excessive thickness of the wear-resistant coating 33, or insufficient thickness affecting its wear resistance performance.

[0044] Preferred, such as Figure 3 and Figure 4 As shown in the embodiment, to prevent the wear-resistant coating 33 from partially peeling off after long-term use, the valve plate 3 may also include an adhesive layer 34. The adhesive layer 34 is disposed between the wear-resistant coating 33 and the thinning cavity 4 to enhance the adhesion of the wear-resistant coating 33 to the metal substrate 30. This arrangement can effectively prevent the wear-resistant coating 33 from peeling off and exposing the metal substrate 30, thereby preventing the metal substrate 30 from directly contacting the valve seat 1 or the limiter 2 and generating noise and vibration.

[0045] Further, preferably, in the embodiments, the adhesion layer 34 may include one of Cr, Ti, and a resin binder. Cr and Ti can form reliable metallic bonds with the metal substrate 30, thereby improving interface stability. When the wear-resistant coating 33 is a graphite coating, in addition to using Cr and Ti, a resin binder can also be used as the adhesion layer 34 to enhance adhesion.

[0046] Furthermore, preferably, when both the wear-resistant coating 33 and the adhesive layer 34 are provided, the sum of the thicknesses of the wear-resistant coating 33 and the adhesive layer 34 is not less than (i.e., equal to or slightly greater than) the depth of the thinning cavity 4. This arrangement effectively prevents burrs from appearing on the unthinned portions of the metal substrate 30. Since the density of the metal substrate 30 is much greater than the density of the wear-resistant coating 33, the weight of its moving part 32 is still reduced relative to the positioning part 31, thereby ensuring the response speed of the moving part 32.

[0047] In addition, preferred, such as Figure 3 and Figure 4As shown, in this embodiment, when the thinning cavity 4 is fabricated using laser etching or chemical etching, an irregular microporous structure 35 can be formed on the surface of the thinning cavity 4. The microporous structure 35 increases the actual contact area between the wear-resistant coating 33 and the metal substrate 30, and allows the wear-resistant coating 33 and the adhesion layer 34 to embed and fill within the microporous structure 35, thereby effectively reducing coating peeling, flaking, or detachment caused by impact. Simultaneously, the microporous structure 35 can absorb localized stress concentration caused by differences in materials (differences in elastic modulus), thereby improving the fatigue load of the valve plate 3 during cyclic use, increasing the service life of the valve plate 3, and enhancing the reliability of the scroll compressor.

[0048] Furthermore, preferably, such as Figure 4 As shown in the embodiment, after the metal substrate 30 is thinned into a cavity 4 using laser etching or chemical etching, a transition edge 40 is formed at the junction of the thinned cavity 4 and the top or bottom surface of the metal substrate 30. Since the transition edge 40 is a non-smooth transition, the wear-resistant coating 33 can extend to cover the transition edge 40, forming a covering layer with certain hardness, toughness, and buffering capacity. This can then passivate the stress on the transition edge 40 and reduce the local stress gradient. Simultaneously, the wear-resistant coating 33 fills the micro-grooves and steps formed by etching or corrosion, making the transition edge 40 smoother and preventing the formation of metal cracks.

[0049] Furthermore, according to a second aspect of the present invention, a method for manufacturing a valve plate is provided, the method being used to manufacture a valve plate 3 in the valve assembly described above, the method comprising the following steps: Step 1: Clean the surface of the metal substrate 30; Step 2: A thinning cavity 4 is formed on the surface of the metal substrate 30, and the surface roughness Ra of the metal substrate 30 is made to be 1.5μm-3μm by controlling the process parameters; Step 3: The adhesion layer 34 is deposited in the thinning cavity 4 of the metal substrate 30 using a deposition method; Step 4: Apply the wear-resistant coating 33 to the adhesive layer 34 using a deposition or spraying method; Step 5: Perform low-temperature annealing on valve plate 3; Step 6: Perform surface passivation treatment on valve plate 3; Step 7: Perform micro-polishing on valve plate 3.

[0050] Specifically, in step one, the metal substrate 30 of the valve plate 3 is first cleaned to remove grease from the metal surface and improve adhesion. In step two, a thinning cavity 4 can be formed on the metal substrate 30 of the valve plate 3 by milling, laser etching, or chemical etching, while controlling the process parameters to make the surface roughness Ra of the metal substrate 30 1.5μm-3μm (inclusive). In step three, the adhesion layer 34 can be bonded to the thinning cavity 4 of the metal substrate 30 by physical vapor deposition or chemical vapor deposition. In step four, a DLC coating can be deposited onto the adhesion layer 34 by deposition, or a MoS2 coating or graphite coating can be sprayed onto the adhesion layer 34 by spraying. In step five, the valve plate 3 is subjected to low-temperature annealing to prevent the wear-resistant coating 33 from peeling off. In step six, the valve plate 3 is subjected to surface passivation treatment to reduce the coefficient of friction of the valve plate 3. In step seven, the valve plate 3 is micro-polished to improve its surface finish, thereby enhancing its hydrodynamic properties.

[0051] Furthermore, preferably, the manufacturing method of the valve plate may also include step eight, performing an adhesion test on the wear-resistant coating 33. Specifically, the adhesion test may be performed using the cross-cut test (ASTM D331519). If the peeling area at the cross-cut points is less than 5%, it is considered a qualified product, thereby ensuring that the wear-resistant coating 33 will not peel off during long-term use of the valve plate 3.

[0052] In addition, such as Figure 1 and Figure 2 As shown, according to a third aspect of the present invention, a scroll compressor is provided, the scroll compressor including the valve assembly as described above.

[0053] During use, the valve assembly, by providing a thinning cavity 4, a wear-resistant coating 33, and an adhesion layer 34 in the movable part 32 of the metal substrate 30, enables the valve plate 3 to respond quickly to pressure changes, while reducing noise, enhancing wear resistance and service life, effectively preventing fatigue fracture, and improving the reliability of the valve assembly and the efficiency of the scroll compressor.

[0054] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A valve assembly disposed on the fixed scroll plate of a scroll compressor, characterized in that, The valve assembly includes: Valve seat; A limit switch is fixed to the valve seat; A valve plate includes a metal substrate, the metal substrate comprising a positioning portion and a movable portion, the metal substrate being mounted to the valve seat via the positioning portion, and the movable portion moving between the limiter and the valve seat; and A thinning cavity is provided in the movable part, and the thickness of the movable part at the location where the thinning cavity is provided is less than the thickness of the positioning part. The thinning cavity covers at least one of the exhaust hole and the pressure relief hole of the fixed vortex disk.

2. The valve assembly according to claim 1, characterized in that, The thinning cavity is disposed on one or more of the upper and lower surfaces of the movable part.

3. The valve assembly according to claim 2, characterized in that, The total depth of the thinning cavities is 0.03% to 1% of the thickness of the metal substrate.

4. The valve assembly according to claim 1, characterized in that, The valve plate also includes a wear-resistant coating disposed within the thinning cavity. The wear-resistant coating includes one of a graphite coating, a DLC coating, and a MoS2 coating.

5. The valve assembly according to claim 4, characterized in that, The valve plate further includes an adhesive layer disposed between the wear-resistant coating and the thinning cavity. The adhesive layer includes one of Cr, Ti and a resin binder. The sum of the thicknesses of the wear-resistant coating and the adhesive layer is not less than the depth of the thinning cavity.

6. The valve assembly according to claim 5, characterized in that, The thinning cavity is made by laser etching or chemical etching, which creates a microporous structure on the surface of the thinning cavity, and the wear-resistant coating and the adhesive layer can be embedded in the microporous structure.

7. The valve assembly according to claim 6, characterized in that, A transition edge is formed at the junction of the thinning cavity and the metal substrate, and the wear-resistant coating extends to cover the transition edge.

8. A method for manufacturing a valve plate, characterized in that, The method for manufacturing the valve plate is used to manufacture the valve plate in the valve assembly according to any one of claims 5 to 7, and the method for manufacturing the valve plate includes the following steps: Step 1: Clean the surface of the metal substrate; Step 2: The thinning cavity is formed on the surface of the metal substrate, and the surface roughness Ra of the metal substrate is made to be 1.5μm-3μm by controlling the process parameters; Step 3: Deposit the adhesion layer into the thinning cavity of the metal substrate using a deposition method; Step 4: Apply the wear-resistant coating to the adhesion layer using a deposition or spraying method; Step 5: Perform low-temperature annealing on the valve plate; Step six: Perform surface passivation treatment on the valve plate; Step 7: Perform micro-polishing on the valve plate.

9. The method for manufacturing a valve plate according to claim 8, characterized in that, The manufacturing method of the valve plate further includes: step eight, performing an adhesion test on the wear-resistant coating, wherein the adhesion test is performed by cross-cutting method, and if the peeling area at the cross-cutting point is less than 5%, it is a qualified product.

10. A scroll compressor, characterized in that, The scroll compressor includes the valve assembly according to any one of claims 1 to 7.

Images