Valve plate structure and compressor with same

Abstract

The utility model provides a valve plate structure and a compressor with the valve plate structure, the valve plate structure is arranged on a valve plate, and the valve plate structure comprises a head part, a waist part and a tail part which are connected in sequence; the tail part is connected with the valve plate, the head part corresponds to the position of the exhaust hole in the valve plate, and the head part movably covers the exhaust hole in the valve plate; a plurality of through holes are formed in the waist part at intervals, and the distance between every two adjacent through holes is gradually increased in the direction from the head part to the tail part. By means of the through holes, the overall mass of the valve plate can be reduced, the waist portion can be bent more easily, variable-rigidity opening and closing of the valve plate are achieved, and the response frequency of the valve plate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a valve plate structure and a compressor with the valve plate structure. Background Art

[0002] The exhaust valve plate is one of the core components of a refrigerator compressor. The timeliness of opening and closing and the reliable operation of the exhaust valve plate play a decisive role in the performance, cooling capacity and reliability of the compressor. With the increasing requirement for the energy efficiency level of compressors, the compressors operate at a wide frequency range and high speed. After the conventional exhaust valve plate operates at high speed, the opening and closing response frequency of the valve plate is relatively low and the closing is delayed, and the reliability is difficult to ensure, which cannot meet the use requirements for the development of compressors. Content of the Utility Model

[0003] The utility model provides a valve plate structure and a compressor with the valve plate structure, which can solve the technical problems that the valve plate is prone to relatively low response frequency and delayed closing under high-frequency operation.

[0004] The utility model provides a valve plate structure. The valve plate structure is installed on a valve plate and comprises a head, a waist and a tail which are connected in sequence.

[0005] The tail is connected with the valve plate. The head corresponds to the position of an exhaust hole on the valve plate, and the head movably covers the exhaust hole on the valve plate.

[0006] A plurality of through holes are arranged on the waist. The plurality of through holes are arranged at intervals, and the distance between adjacent through holes gradually increases in the direction from the head to the tail.

[0007] In some embodiments, the head has a concave portion, and the center of the concave portion protrudes towards the exhaust hole so that the protruding portion of the concave portion is located in the exhaust hole.

[0008] In some embodiments, taking the surface of the valve plate structure away from the valve plate as a projection plane, the projection of the concave portion on the valve plate structure is circular; the outer wall of the concave portion protruding towards the exhaust hole is a spherical surface.

[0009] In some embodiments, the diameter of the exhaust hole is D1, the diameter of the concave portion is D2, and the diameters D1 and D2 satisfy: 1≤D1 / D2≤1.1.

[0010] In some embodiments, taking the longitudinal section of the valve plate structure as a projection plane, the depth of the concave portion is f, the height of the exhaust hole is S, and the depth f and the height S satisfy: 0.7≤f / S≤0.9.

[0011] In some embodiments, taking the surface of the valve plate structure away from the valve plate as the projection plane, the length of the through hole is C, the width of the through hole is D, the waist width of the waist part is H, and the length from the center of the concave part to the outermost end of the tail part is L;

[0012] The length C, the width D, and the waist width H satisfy: C < 0.5H;

[0013] The waist width H and the length L satisfy: 0.2 < H / L < 0.3.

[0014] In some embodiments, six through holes are provided on the waist part, and the distances between adjacent through holes are L1, L2, L3, L4, and L5 respectively. The distances L1, L2, L3, L4, and L5 satisfy: L1 < 0.8L2 < 0.8L3 < 0.85L4 < 0.85L5.

[0015] In some embodiments, taking the longitudinal section of the valve plate structure as the projection plane, the head part, the waist part, and the tail part all include a valve plate substrate, and wear-resistant layers are provided on both the upper surface and the lower surface of the valve plate substrate.

[0016] In some embodiments, the wear-resistant layer includes a transition layer and a surface coating. The valve plate substrate, the transition layer, and the surface coating are sequentially arranged from the inside out to form a sandwich structure;

[0017] The material of the transition layer is chromium tungsten material or tungsten carbide material, and the surface coating is a diamond-like carbon film.

[0018] A compressor includes a valve plate structure, and the valve plate structure is the above-mentioned valve plate structure.

[0019] A valve plate structure and a compressor having the valve plate structure provided by the present invention have the following beneficial effects:

[0020] During the opening process of the valve plate, the waist part will bend. In the present invention, a plurality of through holes are provided on the waist part, and the distance between adjacent through holes gradually increases, that is, the distance between adjacent through holes is a variable-distance design. The opened through holes can reduce the overall mass of the valve plate, making the waist part easier to bend, realizing variable stiffness opening and closing of the valve plate. Combined with the fact that the closer the waist part is to the head part, the greater the bending degree, the smaller the distance between adjacent through holes, and the easier the waist part is to deform and recover. And the closer to the tail part, the smaller the deformation of the waist part. In order to ensure the overall stiffness of the valve plate, the distance between adjacent through holes is larger. This kind of setting not only helps the valve plate to open, but also when the valve plate closes, the valve plate is easier to close, improves the response frequency of the valve plate, and ensures that the valve plate will not have delayed closing and flutter phenomena under high-frequency operation. Description of the Drawings

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are merely exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained by extending the provided drawings.

[0022] Figure 1 It is the valve plate structure of the prior art;

[0023] Figure 2 Schematic diagram when the valve plate structure of the embodiment of the present invention is connected to the valve plate and the limiter;

[0024] Figure 3 It is the top view of the surface of the valve plate structure of the embodiment of the present invention away from the valve plate;

[0025] Figure 4 It is the side view of the valve plate structure of the embodiment of the present invention;

[0026] Figure 5 It is the schematic diagram of length C, width D, waist width H and length L of the embodiment of the present invention;

[0027] Figure 6 It is the schematic diagram of the wear-resistant layer of the embodiment of the present invention.

[0028] Drawings: 1 - head; 2 - waist; 201 - through hole; 202 - concave part; 3 - tail; 4 - valve plate; 401 - exhaust hole; 5 - valve plate substrate; 51 - transition layer; 52 - surface coating; 6 - limiter. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] For the convenience of description, spatial relative terms can be used here, such as "above...", "over...", "on the upper surface of...", "upper...", etc., to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0032] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model.

[0033] Referring jointly to Figure 2 As shown, according to an embodiment of the present utility model, a valve plate structure is provided. The valve plate structure is installed on a valve plate 4. The valve plate structure includes a head 1, a waist 2 and a tail 3 which are connected in sequence; the tail 3 is connected to the valve plate 4, the head 1 corresponds to the position of the exhaust hole 401 on the valve plate 4, and the head 1 movably covers the exhaust hole 401 on the valve plate 4; a plurality of through holes 201 are provided on the waist 2, the plurality of through holes 201 are spaced apart, and in the direction from the head 1 to the tail 3, the distance between adjacent through holes 201 gradually increases.

[0034] It is worth noting that in this embodiment, a limiter 6 is also provided. After the valve plate is installed on the valve plate 4, it is fixed by pressing with the limiter 6.

[0035] Specifically, when the refrigerant pressure in the exhaust cavity is relatively high and reaches the exhaust pressure, the high-temperature and high-pressure refrigerant in the exhaust cavity pushes the head 1, causing the head 1 to open away from the exhaust hole 401. The waist 2 will bend at a certain angle, and the head 1 no longer covers the exhaust hole 401, and the refrigerant is discharged from the exhaust hole 401. When the primary exhaust is completed and the air pressure in the exhaust cavity is relatively low, the valve plate structure covers the valve plate 4, and the head 1 covers the exhaust hole 401.

[0036] In this embodiment, referring to Figure 1 as shown, the surface of the valve plate structure of the prior art in contact with the valve plate 4 is a flat surface. During the opening process of the valve plate, the waist 2 will bend. In this embodiment, a plurality of through holes 201 are provided on the waist 2, and the distance between adjacent through holes 201 gradually increases, that is, the distance between adjacent through holes 201 is a variable-spacing design. The opened through holes 201 can reduce the overall mass of the valve plate, making the waist 2 easier to bend, realizing the variable-stiffness opening and closing of the valve plate. Combining that the bending degree of the waist 2 is greater closer to the head 1, the distance between adjacent through holes 201 is smaller, and the waist 2 is easier to deform and recover. And closer to the tail 3, the deformation of the waist 2 is smaller. To ensure the overall stiffness of the valve plate, the distance between adjacent through holes 201 is larger. This setting not only facilitates the opening of the valve plate, but also makes the valve plate easier to close when the valve plate is closed, improves the response frequency of the valve plate, and ensures that the valve plate will not show delayed closing and flutter phenomena under high-frequency operation.

[0037] Referring to Figure 2 as shown, the head 1 has a concave portion 202. Since the concave portion 202 is recessed relative to the head 1, part of the internal recess is convex relative to the exhaust hole 401. When the center of the concave portion 202 protrudes toward the exhaust hole 401, the protruding part of the concave portion 202 is located in the exhaust hole 401.

[0038] Specifically, when the primary exhaust is completed and the air pressure in the exhaust cavity is relatively low, the valve plate covers the valve plate 4, and the head 1 covers the exhaust hole 401. At this time, due to the existence of the concave portion 202, the head 1 does not cover the exhaust hole 401 in a flat manner, and the protruding part of the concave portion 202 is located in the exhaust hole 401.

[0039] In this embodiment, the valve plate will slap the valve plate 4 during the closing process. Due to the existence of the concave portion 202, the head 1 has a curved surface. This method can reduce the deformation generated during the process of the valve plate slapping the valve plate 4. During the high-speed operation of the valve plate, the valve plate is easier to close and cover the exhaust hole 401. In addition, the setting of the concave portion 202 can reduce the clearance volume of the compressor, improve the refrigeration capacity, improve the opening stability of the valve plate, and increase the exhaust efficiency.

[0040] Referring to Figure 2 and Figure 3As shown, taking the surface of the valve plate structure away from the valve plate 4 as the projection plane, the projection of the concave portion 202 on the valve plate structure is circular; the outer wall of the concave portion 202 protruding towards the exhaust hole 401 is spherical.

[0041] In this embodiment, the center of the concave portion 202 protrudes towards the exhaust hole 401, and the exhaust hole 401 is circular. In order to facilitate the closing of the valve plate more, the projection of the concave portion 202 on the valve plate structure is circular, and the outer wall of the concave portion 202 protruding towards the exhaust hole 401 is spherical. While not affecting the closing of the head 1, it fits better with the exhaust hole 401.

[0042] As a specific implementation manner, a concave portion 202 is provided at the center of the head 1. When the center of the concave portion 202 protrudes towards the exhaust hole 401, a flange is formed at one end of the head 1 away from the waist 2, so that the protruding portion of the concave portion 202 is located in the exhaust hole 401. When the valve plate pats the valve plate 4, the flange laps with the valve plate 4, which can not only prevent the end of the valve plate from extending into the exhaust hole 401, but also improve the deformation caused during the patting process.

[0043] Combined with reference to Figure 2 and Figure 5 As shown, the diameter of the exhaust hole 401 is D1, and the diameter of the concave portion 202 is D2. The diameters D1 and D2 satisfy: 1 ≤ D1 / D2 ≤ 1.1.

[0044] In this embodiment, the diameter of the exhaust hole 401 is larger than the diameter of the concave portion 202. When the valve plate is closed, it is ensured that the protruding portion of the concave portion 202 does not interfere with the exhaust hole 401, and the protruding portion of the concave portion 202 is located in the exhaust hole 401. Secondly, when the valve plate is opened, the diameter of the concave portion 202 is smaller than the diameter of the exhaust hole 401, that is, there is a distance between the outer wall of the concave portion 202 and the inner wall of the exhaust hole 401, which is also convenient for the opening of the valve plate.

[0045] Combined with reference to Figure 2 and Figure 5 As shown, taking the longitudinal section of the valve plate structure as the projection plane, the depth of the concave portion 202 is f. The depth f is the vertical distance from the lower surface of the valve plate structure to the outer wall of the most protruding part of the concave portion 202, or it can also be the vertical distance from the upper surface of the valve plate structure to the inner wall of the most protruding part of the concave portion 202. The height of the exhaust hole 401 is S. The depth f and the height S satisfy: 0.7 ≤ f / S ≤ 0.9.

[0046] In this embodiment, the depth of the concave portion 202 also determines the length of the concave portion 202 located at the exhaust hole 401. Considering the response frequency of the valve plate, within this range, the setting of the concave portion 202 reduces the clearance volume of the compressor, improves the refrigerating capacity, and improves the deformation of the valve plate structure caused by hitting the exhaust hole 401 during high-speed operation, resulting in the problem that the valve plate cannot be closed in time, causing leakage. At the same time, it improves the stability of the valve plate opening and increases the exhaust efficiency.

[0047] Combined with Figures 2 to 5 As shown, taking the surface of the valve plate structure away from the valve plate 4 as the projection plane, the length of the through hole 201 is C, the width of the through hole 201 is D, the waist width of the waist portion 2 is H, and the length from the center of the concave portion 202 to the outermost end of the tail portion 3 is L; the length C, the width D, and the waist width H satisfy: C < 0.5H; the waist width H and the length L satisfy: 0.2 < H / L < 0.3.

[0048] Specifically, when the refrigerant pressure in the exhaust cavity is relatively high and reaches the exhaust pressure, the high-temperature and high-pressure refrigerant in the exhaust cavity pushes the head portion 1, causing the head portion 1 to open away from the exhaust hole 401. The waist portion 2 will be bent at a certain angle, and the protruding portion of the concave portion 202 gradually extends out of the exhaust hole 401. At this time, the head portion 1 no longer covers the exhaust hole 401, and the refrigerant is discharged from the exhaust hole 401; when a single exhaust is completed and the air pressure in the exhaust cavity is relatively low, the valve plate covers the valve plate 4, the head portion 1 covers the exhaust hole 401, and the protruding portion of the concave portion 202 is located in the exhaust hole 401.

[0049] In this embodiment, the function of the multiple through holes 201 is to reduce the overall mass of the valve plate, making it easier for the waist portion 2 to be bent, realizing the variable stiffness opening and closing of the valve plate. Combining that the closer the waist portion 2 is to the head portion 1, the greater the bending degree, and the smaller the distance between adjacent through holes 201, the easier it is for the waist portion 2 to deform and recover; while the closer to the tail portion 3, the smaller the deformation of the waist portion 2. The function of the concave portion 202 is to make the head portion 1 have a curved surface. This way can reduce the deformation generated during the process of the valve plate hitting the valve plate 4. During the high-speed operation of the valve plate, the valve plate is easier to close and cover the exhaust hole 401. Since the overall volume of the valve plate structure is relatively small, and the length C, the width D, the waist width H, and the length L are within the above range, it can not only ensure that the valve plate structure has a certain stiffness, but also is more conducive to the response and closing of the valve plate structure.

[0050] Combined with Figure 2 and Figure 5 As shown, six through holes 201 are provided on the waist portion 2, and the distances between adjacent through holes 201 are L1, L2, L3, L4, L5 respectively. The distance L1, the distance L2, the distance L3, the distance L4, and the distance L5 satisfy: L1 < 0.8L2 < 0.8L3 < 0.85L4 < 0.85L5.

[0051] In this embodiment, compared with only providing a through hole 201 at the waist 2 or providing equidistant through holes 201, this embodiment fully combines the different bending degrees at different positions of the waist 2. The distances L1, L2, L3, L4, and L5 gradually increase, which is more in line with the bending form of the waist 2, realizing variable stiffness opening and closing of the valve plate structure, improving the response frequency of the valve plate, and ensuring that there will be no delayed closing and flutter phenomena in the valve plate structure under high-frequency operation. In this embodiment, it is preferably provided with six through holes 201. In other embodiments, according to the length and stiffness requirements of the waist 2, the number of through holes 201 can be set less than or more than six. According to the number of through holes 201 provided, it is ensured that the spacing between adjacent through holes 201 is not equal.

[0052] Referring to Figure 2 and Figure 6 As shown, taking the longitudinal section of the valve plate structure as the projection plane, the head 1, the waist 2, and the tail 3 all include a valve plate base body 5, and wear-resistant layers are provided on both the upper surface and the lower surface of the valve plate base body 5.

[0053] In this embodiment, when the valve plate structure needs to be closed, the head 1 will strike the valve plate 4. This embodiment not only has a concave portion 202, but also a wear-resistant layer, which improves the reliability of the valve plate at high impact speeds and ensures long-term reliable operation.

[0054] Referring to Figure 2 and Figure 6 As shown, the wear-resistant layer includes a transition layer 51 and a surface coating 52. The valve plate base body 5, the transition layer 51, and the surface coating 52 are arranged in sequence from the inside to the outside to form a sandwich structure.

[0055] Specifically, the surface coating 52 uses a diamond-like carbon coating, and the surface is an amorphous structure, effectively improving the anti-wear performance of the valve plate. Between the valve plate base body 5, the transition layer 51, and the surface coating 52, from the surface to the core of the base body is a gradient structure or a multi-metal composite structure, and the coating bonding force is stronger. The total thickness of the coating is between 2 and 5 μm, which does not affect the assembly and use of the valve plate. In addition, according to the surface state of the material of the valve plate base body 5, the coating structure can achieve a smaller surface roughness, and Ra is less than 0.05 μm. Wear-resistant layers formed by heat treatment are attached to the upper and lower surfaces of the valve plate base body 5. The wear-resistant coating is a diamond-like coating formed by surface strengthening treatment, which improves the reliability of the valve plate at high impact speeds and ensures long-term reliable operation.

[0056] In this embodiment, a transition layer 51 and a surface coating 52 are sprayed on the valve plate substrate 5. The transition layer 51 is made of chromium or tungsten carbide material, and the surface coating 52 is a diamond-like graphite coating. The hardness of the diamond-like coating is greater than or equal to 1500 HV, and the total thickness of the coating is 2 - 5 μm. For the valve plate structure adopting the coating solution, the bending stress of the valve plate structure is increased by 60%, the tensile strength is increased by 50%, the impact fatigue strength of the valve plate structure is improved, the reliability of the valve plate structure is increased by more than 3 times, the maximum long-term use temperature is broadened to reach above 300 °C, the reliability of the valve plate at high impact speeds is improved, and long-term reliable operation is ensured.

[0057] A compressor includes a valve plate structure, and the valve plate structure is the above-mentioned valve plate structure.

[0058] In this embodiment, when the compressor adopts the valve plate structure in this embodiment, the function of the multiple through holes 201 is to reduce the overall mass of the valve plate, making the waist 2 easier to bend, realizing variable stiffness opening and closing of the valve plate. Considering that the closer the waist 2 is to the head 1, the greater the bending degree, and the smaller the distance between adjacent through holes 201, the easier the waist 2 is to deform and recover; while the closer to the tail 3, the smaller the deformation of the waist 2. The function of the concave portion 202 is to make the head 1 have a curved surface. This way can reduce the deformation generated during the process of the valve plate hitting the valve plate 4. During the high-speed operation of the valve plate, the valve plate is easier to close and cover the exhaust hole 401. For the valve plate structure adopting the coating solution, the bending stress of the valve plate structure is increased by 60%, the tensile strength is increased by 50%, the impact fatigue strength of the valve plate structure is improved, the reliability of the valve plate structure is increased by more than 3 times, the maximum long-term use temperature is broadened to reach above 300 °C, the reliability of the valve plate at high impact speeds is improved, and long-term reliable operation is ensured.

[0059] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A valve plate structure, the valve plate structure is installed on a valve plate (4), characterized in that, Comprising: A head (1), a waist (2) and a tail (3) connected in sequence; The tail (3) is connected to the valve plate (4), the head (1) corresponds to the position of the exhaust hole (401) on the valve plate (4), and the head (1) movably covers the exhaust hole (401) on the valve plate (4); A plurality of through holes (201) are provided on the waist (2), the plurality of through holes (201) are spaced apart, and in the direction from the head (1) to the tail (3), the distance between adjacent through holes (201) gradually increases.

2. The valve plate structure according to claim 1, wherein The head (1) has a concave portion (202), and the center of the concave portion (202) protrudes towards the exhaust hole (401) so that the protruding portion of the concave portion (202) is located in the exhaust hole (401).

3. The valve plate structure according to claim 2, wherein, Taking the surface of the valve piece structure away from the valve plate (4) as the projection plane, the projection of the concave portion (202) on the valve piece structure is circular; the outer wall of the concave portion (202) protruding towards the exhaust hole (401) is spherical.

4. The valve plate structure according to claim 3, characterized in that, The diameter of the exhaust hole (401) is D1, the diameter of the concave portion (202) is D2, and the diameter D1 and the diameter D2 satisfy: 1 ≤ D1 / D2 ≤ 1.

1.

5. The valve plate structure according to claim 3, wherein, Taking the longitudinal section of the valve piece structure as the projection plane, the depth of the concave portion (202) is f, the height of the exhaust hole (401) is S, and the depth f and the height S satisfy: 0.7 ≤ f / S ≤ 0.

9.

6. The valve plate structure according to claim 2, characterized in that, Taking the surface of the valve piece structure away from the valve plate (4) as the projection plane, the length of the through hole (201) is C, the width of the through hole (201) is D, the waist width of the waist (2) is H, and the length from the center of the concave portion (202) to the outermost end of the tail (3) is L; The length C, the width D and the waist width H satisfy: C < 0.5H; The waist width H and the length L satisfy: 0.2 < H / L < 0.

3.

7. The valve plate structure according to claim 1, wherein Six through holes (201) are provided on the waist (2), and the distances between adjacent through holes (201) are L1, L2, L3, L4, L5 respectively, and the distances L1, the distance L2, the distance L3, the distance L4 and the distance L5 satisfy: L1 < 0.8L2 < 0.8L3 < 0.85L4 < 0.85L5.

8. The valve plate structure according to claim 1, wherein, Taking the longitudinal section of the valve piece structure as the projection plane, the head (1), the waist (2) and the tail (3) all include a valve piece base body (5), and wear-resistant layers are provided on both the upper surface and the lower surface of the valve piece base body (5).

9. The valve plate structure according to claim 8, wherein The wear-resistant layer includes a transition layer (51) and a surface coating (52), and the valve piece base body (5), the transition layer (51) and the surface coating (52) are arranged in sequence from the inside to the outside to form a sandwich structure; Wherein, the material of the transition layer (51) is chromium tungsten material or tungsten carbide material, and the surface coating (52) is a diamond-like carbon graphite film.

10. A compressor, comprising a valve plate structure, characterized in that, The valve piece structure is the valve piece structure according to any one of claims 1 to 9.

Images