A suction valve group structure for a reciprocating piston refrigeration compressor

Abstract

The application discloses a suction valve group structure for a reciprocating piston type refrigeration compressor, which comprises a valve plate, wherein one or more small and shallow grooves are arranged on the contact area between the motion part of a suction valve piece and the valve plate, and the end of the groove is arranged close to or communicated with a valve line groove. The small and shallow grooves are arranged on the contact area between the motion part of the suction valve piece and the valve plate, so that the contact area between the valve plate and the motion part of the suction valve piece is reduced, the flow is guided, the adsorption force between the motion part of the suction valve piece and the valve plate is reduced, the opening resistance of the suction valve piece is reduced, the suction valve piece can be opened in advance, and the performance coefficient of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor valve plate, in particular to a suction valve group structure for reciprocating piston refrigeration compressor. BACKGROUND

[0002] The suction valve sheet is an important component of the compressor, which is a spring sheet between the low-pressure side of the compressor and the cylinder. It opens during suction and closes during exhaust, and is used to control the inflow and outflow of gas into the cylinder of the compressor. The performance of the suction valve sheet directly affects the suction efficiency of the compressor.

[0003] In the current common small reciprocating piston refrigeration compressor (household refrigerator and small freezer), the suction side of the valve plate (except the valve line groove) is in contact with the moving part of the suction valve sheet. The contact surface is a plane. This reduces the clearance volume. Because the contact area between the valve plate and the moving part of the suction valve sheet is large, the adsorption force between the valve plate and the moving part of the suction valve sheet will be large, which increases the force required to open the valve sheet, delays the opening of the valve sheet, increases the suction loss, and reduces the gas delivery coefficient.

[0004] For example, a compressor suction valve sheet assembly and a compressor were disclosed in Chinese Utility Model Patent (Publication No. CN207229337U) in 2018. The compressor suction valve sheet assembly includes a suction valve sheet and a valve plate. The suction valve sheet is provided with a spring sheet, and a U-shaped first gap is formed between the spring sheet and the suction valve sheet. A filler sheet is provided on the spring sheet, and a second gap is formed between the filler sheet and the spring sheet. The two ends of the first gap are bent away from the filler sheet. An arc-shaped suction hole is formed on the valve plate. When the suction valve sheet cover is arranged on the valve plate, the suction hole is located between the first gap and the second gap. The valve plate and the suction valve sheet are in plane contact, the contact area is large, and the adsorption force between the suction valve sheet and the valve plate is also large.

[0005] In addition, the surface roughness value of the current valve plate is very small, the surface roughness Ra of the valve plate is less than 0.4, and the surface roughness Ra of the suction valve sheet is also less than 0.4. Similarly, the actual contact area is increased, the adsorption force is increased, and the opening of the suction valve sheet is not facilitated. SUMMARY

[0006] The purpose of the present application is to reduce the adsorption force of the suction valve sheet while ensuring that the clearance volume is within an acceptable range, to improve the gas delivery coefficient, and to provide a suction valve group structure for a reciprocating piston refrigeration compressor.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0008] The application relates to a suction valve group structure for a reciprocating piston refrigeration compressor, which comprises a valve plate, wherein one or more small and shallow grooves are arranged on the valve plate at the contact area between the motion part of a suction valve piece and the valve plate.

[0009] By arranging one or more small and shallow grooves on the valve plate at the contact area between the motion part of a suction valve piece and the valve plate (except the valve line groove), the contact area between the valve plate and the motion part of the suction valve piece is reduced, the adsorption force between the motion part of the suction valve piece and the valve plate is reduced, the opening resistance of the suction valve piece is reduced, the suction valve piece can be opened earlier, and the performance coefficient of the compressor is improved.

[0010] That is, the valve plate of the compressor is improved, the suction valve piece can be more easily opened, the suction efficiency is improved, more gas can be sucked in the compressor in each cycle, the refrigerating capacity of the compressor is improved, and the performance coefficient of the compressor is improved.

[0011] The small and shallow grooves are directly machined on the valve plate, the structure is simple and reasonable, other components are not damaged, and the installation of other components is not affected.

[0012] In the field of small reciprocating piston refrigeration compressors, due to the narrow internal space, the valve plate assembly is arranged differently from large compressors, and in the arrangement process of the valve plate assembly, one of the focuses between the suction valve piece and the valve plate is how to reduce the clearance volume. Under this idea, it is difficult to think of arranging grooves between the valve plate and the suction valve piece, and the conventional idea is that the clearance volume is increased after the grooves are arranged. The application overcomes the above-mentioned idea, and one or more grooves are arranged at the contact area between the valve plate and the suction valve piece. The grooves do not excessively increase the clearance volume, but on the contrary, the grooves can guide air flow, reduce the contact area, reduce the adsorption force and the like, and are beneficial to the opening of the suction valve piece.

[0013] Further, one side of the valve plate is provided with a suction valve piece, the suction valve piece is provided with an openable and closable suction tongue piece, and the movable part of the suction tongue piece is the motion part of the suction valve piece.

[0014] The suction tongue piece is opened and closed under the action of air flow, the end part is fixed on the suction valve piece, and the movable part is between the free end and the fixed end, that is, one side of the suction tongue piece is attached to the valve plate in the non-opening state of the suction valve piece, and the area on the valve plate corresponding to the side is the contact area.

[0015] Further, the air suction tongue is in a "U" shape structure, comprising a pair of opening arms, a pair of the opening arms are provided with the grooves in the area of the valve plate orthographic projection, the grooves in the two side areas are symmetrically provided. The air suction tongue with this structure has excellent stability and air guiding performance.

[0016] Further, the groove width of a single groove is 0.1-8mm, the groove depth of a single groove is 0.03-1mm, the groove spacing of two adjacent grooves is 0.1-3mm; the ratio of the groove width to the groove spacing is 0.1-10.

[0017] Further, the grooves are a plurality of strip grooves, which are arranged along the length direction of the contact area, the distance between the upper end of the groove and the upper boundary of the contact area is 0.2-8mm, and the distance between the lower end of the groove and the lower boundary of the contact area is also 0.2-8mm; the distance between the groove on the side and the left boundary or the right boundary of the contact area is 0.2-3mm.

[0018] Further, the grooves are a plurality of grooves arranged in the contact area, one end of the groove is communicated with the valve line groove, and the other end extends to the upper boundary of the contact area.

[0019] In this structure, the groove is through the contact area between the valve plate and the air suction valve piece movement part, that is, the groove is communicated with the valve line groove, the groove can conveniently guide the gas between the valve plate and the air suction valve piece, the groove has the air guiding function, which is beneficial to the opening of the air suction valve piece, and also reduces the contact area and the adsorption force between the air suction valve piece and the valve plate.

[0020] Further, the grooves are two, the distance between the main part of the groove and the left boundary or the right boundary of the contact area is 0.2-3mm.

[0021] Further, the grooves are two straight strip grooves, one end of the straight strip groove is close to the upper edge of the contact area, and the other end is communicated with the valve line groove; a plurality of inclined grooves are arranged between the straight strip groove and the left boundary or the right boundary of the contact area, and the inclined groove is communicated with the corresponding straight strip groove.

[0022] Further, the distance between the two straight strip grooves is 0.1-3mm, the distance between the left straight strip groove and the left boundary of the contact area is 0.2-3mm, and the distance between the right straight strip groove and the right boundary of the contact area is also 0.2-3mm.

[0023] Further, the groove is a groove with a surface roughness Ra of 0.8-125 at the contact area. That is, the surface roughness Ra of the contact area on the valve plate is 0.8-125, which can reduce the adsorption force and facilitate the opening of the suction valve plate. Alternatively, the surface roughness Ra of the local surface of the valve plate at the contact area is 0.8-125

[0024] Further, the groove comprises intersecting grooves. That is, there can be transverse grooves and vertical grooves, and the spacing between the grooves still exists.

[0025] Compared with the prior art, the present application has the following advantages: 1. By opening some small and shallow grooves on the valve plate at the contact area of the suction valve plate movement part, the contact area between the valve plate and the suction valve plate movement part is reduced, the adsorption force between the suction valve plate movement part and the valve plate is reduced, the opening resistance of the suction valve plate is reduced, the suction valve plate can be opened earlier, and the performance coefficient of the compressor is improved.

[0026] 2. The valve plate of the compressor is improved, the suction valve plate can be opened more easily, the suction efficiency is improved, more gas can be sucked in during each cycle of the compressor, the refrigerating capacity of the compressor is improved, and the performance coefficient of the compressor is improved.

[0027] 3. These small and shallow grooves are directly machined or brought out on the valve plate, the structure is simple and reasonable, other components will not be damaged, and the installation of other components will not be affected. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of a suction valve group structure for a reciprocating piston type refrigeration compressor;

[0029] Figure 2 It is an exploded structural schematic diagram of a suction valve group structure for a reciprocating piston type refrigeration compressor;

[0030] Figure 3 It is a schematic diagram of the position of the contact area on the valve plate in the present application;

[0031] Figure 4 It is a schematic diagram of the valve plate in the present application;

[0032] Figure 5 It is Figure 4 It is a local enlarged schematic diagram of the groove on the valve plate in the present application;

[0033] Figure 6 It is a schematic diagram of another valve plate in the present application;

[0034] Figure 7 It isFigure 6 A partially enlarged schematic diagram of the groove on the middle valve plate;

[0035] Figure 8 This is a three-dimensional structural diagram of another valve plate according to the present invention;

[0036] Figure 9 for Figure 8 A partially enlarged schematic diagram of the groove on the middle valve plate;

[0037] In the diagram: 1. Valve plate; 2. Intake valve plate; 3. Intake tongue plate; 4. Valve line groove; 5. Valve line; 6. Contact area; 7. Groove; 701. Inclined groove. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Example 1:

[0041] like Figures 1-4 As shown, a suction valve assembly structure for a reciprocating piston refrigeration compressor includes a valve plate 1, wherein the valve plate 1 has several small and shallow grooves 7 in the contact area 6 between the moving part of the suction valve plate and the valve plate 1.

[0042] By creating small and shallow grooves 7 on the valve plate 1 in the contact area 6 (excluding the valve groove) of the moving part of the suction valve plate 2, the contact area between the valve plate 1 and the moving part of the suction valve plate 2 is reduced, thereby reducing the adsorption force between the moving part of the suction valve plate 2 and the valve plate 1. This reduces the opening resistance of the suction valve plate 2, allowing it to open earlier and improving the performance coefficient of the compressor.

[0043] This means that the compressor's valve plate 1 was improved, making it easier for the suction valve plate 2 to open, thus improving suction efficiency. This allows the compressor to draw in more gas in each cycle, increasing the compressor's cooling capacity and thereby improving the compressor's coefficient of performance.

[0044] These small and shallow grooves 7 are machined directly on the valve plate 1. The structure is simple and reasonable, and will not damage the structure of other components or affect the installation of other components.

[0045] Furthermore, the suction valve plate 2 is installed on one side of the valve plate 1, and the suction valve plate 2 is provided with an openable and closable suction tongue plate 3. The movable part of the suction tongue plate 3 can be understood as the moving part of the suction valve plate.

[0046] The suction tongue 3 opens and closes under the action of airflow. The upper end is fixed to the suction valve plate 2, and the free end and the fixed end at the bottom are movable parts. That is to say, when the suction valve plate 2 is not open, one side of the suction tongue 3 is attached to the valve plate 1, and the area on the valve plate 1 corresponding to this side is the contact area 6.

[0047] Furthermore, the suction tongue 3 has a "U"-shaped structure, including a pair of opening arms. The slots 7 are arranged in the area where the pair of opening arms are projected onto the valve plate 1, and the slots 7 are symmetrically arranged in the two side areas. This structure of the suction tongue 3 has excellent stability and air guiding performance.

[0048] Furthermore, the width a of a single groove 7 is 0.1 to 8 mm, the depth d of a single groove 7 is 0.03 to 1 mm, and the distance e between two adjacent grooves 7 is 0.1 to 3 mm; the ratio of the groove width a to the distance e is 0.1 to 10.

[0049] Furthermore, such as Figure 5 As shown, the groove 7 is a plurality of elongated grooves arranged along the length of the contact area 6. The distance b between the upper end of the groove 7 and the upper boundary of the contact area 6 is 0.2 to 8 mm, and the distance b between the lower end of the groove 7 and the lower boundary of the contact area 6 is also 0.2 to 8 mm. The distance c between the side groove 7 and the left or right boundary of the contact area 6 is 0.2 to 3 mm respectively.

[0050] For example, the groove width a is 0.3mm, the groove depth d is 0.5mm, the groove spacing e is 1mm, the spacing b is 3mm, and the spacing c is 2.5mm, etc.

[0051] Example 2:

[0052] The difference between this embodiment and embodiment one is that another structure of the groove is provided.

[0053] Specifically as shown in Figure 6 and Figure 7 The groove 7 is a plurality of grooves arranged in the contact area 6, one end of the groove 7 is communicated with the valve wire groove 4, and the other end is bent and extended to the upper boundary of the contact area 6.

[0054] In this structure, the groove 7 is through the contact area 6 up and down, that is, the groove is communicated with the valve wire groove, the groove can conveniently introduce gas between the valve plate 1 and the suction valve piece 2, while reducing the contact area and reducing the adsorption force between the suction valve piece 2 and the valve plate 1.

[0055] Further, the groove 7 is two, the distance c between the main part of the groove 7 and the left boundary or the right boundary of the contact area 6 is 0.2-3mm. The groove width a of a single groove 7 is 0.5mm, and the groove spacing e is 2mm.

[0056] In this embodiment, the number of grooves 7 is set to be small, and the processing is simpler. Since it is communicated with the valve wire groove 4, it still has good gas guiding effect and can also reduce the adsorption force between the suction valve piece 2 and the valve plate 1.

[0057] Embodiment three:

[0058] The difference between this embodiment and embodiment one is that another structure of the groove is provided.

[0059] Specifically as shown in Figure 8 and Figure 9 The groove 7 is two straight grooves, one end of the straight groove is close to the upper edge of the contact area 6, and the other end is communicated with the valve wire groove 4; a plurality of inclined grooves 701 are arranged between the straight groove and the left boundary or the right boundary of the contact area 6, and the inclined groove 701 is communicated with the corresponding side of the straight groove.

[0060] Further, the distance e between the two straight grooves is 0.1-3mm, the distance c between the left straight groove and the left boundary of the contact area is 0.2-3mm, and the distance c between the right straight groove and the right boundary of the contact area is also 0.2-3mm.

[0061] In this embodiment, the groove 7 is set as two parallel straight grooves, and several inclined grooves 701 are set between the corresponding sides and the boundary. Although the processing amount is increased, the overall structure has better symmetry and is also connected to the valve groove 4, which has better air guiding and anti-adsorption effect in practice. The inclined grooves 701 are arranged in parallel at equal intervals.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suction valve assembly structure for a reciprocating piston refrigeration compressor, comprising a valve plate, characterized in that, The valve plate has one or more small, shallow grooves in the contact area between the moving part of the intake valve plate and the valve plate. The ends of the grooves are close to or connected to the valve line groove. The width of a single groove is 0.1-8 mm, the depth of a single groove is 0.03-1 mm, and the distance between two adjacent grooves is 0.1-3 mm. The ratio of the groove width to the groove distance is 0.1-10. The grooves are arranged along the length of the contact area, and the distance between the grooves and the left or right boundary of the contact area is 0.2-3 mm. The grooves are two straight grooves, one end of which is close to the upper edge of the contact area, and the other end is connected to the valve line groove. Several inclined grooves are provided between the straight grooves and the left or right boundary of the contact area, and the inclined grooves are close to or connected to the straight grooves on the corresponding side.

2. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, The distance between the upper end of the groove and the upper boundary of the contact area is 0.2 to 8 mm, and the distance between the lower end of the groove and the lower boundary of the contact area is also 0.2 to 8 mm.

3. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, One end of the groove is connected to the valve line groove, and the other end extends to the upper boundary of the contact area.

4. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, The distance between the two straight grooves is 0.1 to 3 mm. The distance between the left straight groove and the left boundary of the contact area is 0.2 to 3 mm, and the distance between the right straight groove and the right boundary of the contact area is also 0.2 to 3 mm.

5. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, The surface roughness Ra of the valve plate in the contact area is 0.8 to 125, or the local surface roughness Ra of the valve plate in the contact area is 0.8 to 125.

6. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, An air intake valve is mounted on one side of the valve plate. The air intake valve is provided with an air intake tongue that can be opened and closed. The movable part of the air intake tongue is the moving part of the air intake valve.

7. The suction valve assembly structure for a reciprocating piston refrigeration compressor according to claim 1, characterized in that, The slots comprise slots arranged in a cross configuration.

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