Valve assembly and piston compressor having the same

Abstract

The application provides a valve assembly and a piston compressor with the valve assembly, wherein the valve assembly comprises a valve plate, an air suction port and an exhaust passage are formed on the valve plate, a valve piece is arranged on the valve plate, the valve piece comprises a first piece body for opening or closing the air suction port and a second piece body for opening or closing the exhaust passage, when the first piece body opens the air suction port, the second piece body is driven by the first piece body to close the exhaust passage, when the second piece body opens the exhaust passage, the first piece body is driven by the second piece body to close the air suction port. According to the application, when the valve assembly is applied to the piston compressor, when the first piece body opens the air suction port, the second piece body is immediately driven by the first piece body to close the exhaust passage, when the second piece body opens the exhaust passage, the first piece body is immediately driven by the second piece body to close the air suction port, thereby solving the problem that the air suction valve piece and the exhaust valve piece in the compressor are delayed to close in the prior art, and the refrigerating capacity and the performance of the compressor are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and particularly relates to a valve assembly and a piston compressor with the same. BACKGROUND

[0002] The valve group is a basic component for a piston compressor to realize its compression function, and the performance of the valve group directly affects the performance, noise and vibration of the compressor. The valve group for the compressor usually comprises a valve plate, a valve piece and a lift limiter, and the valve piece, as an important component of the valve group, usually comprises two components of an air suction valve piece and an air exhaust valve piece. The piston performs periodic reciprocating motion in the cylinder body of the compressor, and the compressor completes air suction and air exhaust once for each reciprocating motion, that is, the air suction valve piece and the air exhaust valve piece are opened and closed once. Since the "delayed closing" often occurs during actual operation, that is, when the piston moves to the stop position, the valve piece is not completely closed, and until the piston runs in the opposite direction for a period of time and distance, the valve piece falls onto the valve plate. Specifically, the air suction valve and the air exhaust valve piece are in a split structure, and they are respectively installed on the two sides of the valve plate, as shown in FIG. 1; when the compressor switches from air exhaust to air suction, the air suction valve piece is opened, but the air exhaust valve piece is not immediately closed, and until the piston runs in the opposite direction for a period of time and distance, the air exhaust valve piece is closed; when the compressor switches from air suction to air exhaust, the air exhaust valve piece is opened, but the air suction valve piece is not immediately closed, and until the piston runs in the opposite direction for a period of time and distance, the air suction valve piece is closed. Whether the air suction valve piece or the air exhaust valve piece, the delayed closing will directly affect the refrigerating capacity and performance of the compressor. Figure 7 SUMMARY

[0003] Therefore, the present application provides a valve assembly, which can overcome the problem that the valve assembly of the existing piston compressor is not reasonable in design, so that the valve piece often appears "delayed closing" during actual operation, thereby affecting the refrigerating capacity and performance of the compressor.

[0004] In order to solve the above problems, the present application provides a valve assembly, comprising: a valve plate and a valve piece, the valve plate is provided with an air suction port and an air exhaust passage, the valve piece is arranged on the valve plate, the valve piece comprises a first piece body for opening or closing the air suction port and a second piece body for opening or closing the air exhaust passage, when the first piece body opens the air suction port, the second piece body closes the air exhaust passage under the driving of the first piece body, and when the second piece body opens the air exhaust passage, the first piece body closes the air suction port under the driving of the second piece body.

[0005] ​In some embodiments, the valve plate comprises a first plate body and a second plate body connected to each other, the air inlet is on the first plate body, one end of the exhaust passage forms an air inlet, the other end of the exhaust passage forms an air outlet, the air inlet is on the first plate body, the air outlet is on the second plate body, and the included angle formed between the first plate body and the second plate body matches the included angle formed between the first plate body and the second plate body.

[0006] In some embodiments, a groove is further formed on the valve plate, the groove extends from the first plate body to the second plate body, and the valve plate is installed in the groove.

[0007] In some embodiments, a buffer cavity is formed on the groove bottom wall, the buffer cavity is on the second plate body, and the exhaust passage communicates with the buffer cavity through the air outlet.

[0008] In some embodiments, the number of exhaust passages is two, and the two exhaust passages are symmetrically distributed with respect to the groove.

[0009] In some embodiments, an air passage hole is further formed on the first plate body and penetrates the first plate body, after the valve assembly is assembled in the compressor, one end of the air passage hole communicates with the inside of the cylinder head, and the other end of the air passage hole communicates with a sound attenuation cavity.

[0010] In some embodiments, the valve plate further has a connecting portion at the connection between the first plate body and the second plate body, and the valve plate further has a mounting groove, and the connecting portion is mounted in the mounting groove.

[0011] In some embodiments, the material of the valve plate is valve plate steel.

[0012] In some embodiments, the thickness of the valve plate is 0.1-1.0 mm.

[0013] The application further provides a piston compressor comprising the valve assembly.

[0014] The application provides a valve assembly and a piston compressor with the same, wherein the first plate body corresponds to an air suction valve plate, and the second plate body corresponds to an air exhaust valve plate; the air suction valve plate and the air exhaust valve plate are connected together to form an integrally formed valve plate. When the valve assembly is applied to the piston compressor, the first plate body opens the air suction port, and under the overall linkage of the valve plate, the second plate body is immediately closed under the driving of the first plate body when the compressor switches from air exhaust to air suction; the second plate body opens the air exhaust channel, and under the overall linkage of the valve plate, the first plate body is immediately closed under the driving of the second plate body when the compressor switches from air suction to air exhaust, thereby solving the problems that the air exhaust valve plate is delayed to be closed when the compressor switches from air exhaust to air suction, and the air suction valve plate is delayed to be closed when the compressor switches from air suction to air exhaust, and improving the refrigerating capacity and performance of the compressor. Meanwhile, compared with the air suction valve plate and the air exhaust valve plate in the prior art, the valve plate has a smaller volume and consumes less material, and further reduces the cost of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an exploded schematic view of the valve assembly of the embodiment of the application.

[0016] Figure 2 It is a sectional view of the valve plate of the valve assembly of the embodiment of the application.

[0017] Figure 3 It is a sectional view of the valve plate of the valve assembly of the embodiment of the application.

[0018] Figure 4 It is a partial sectional view of the piston compressor of the embodiment of the application when air is exhausted.

[0019] Figure 5 It is a partial sectional view of the piston compressor of the embodiment of the application when air is sucked.

[0020] Figure 6 It is a top view of the piston compressor of the embodiment of the application.

[0021] Figure 7 It is an exploded schematic view of the valve assembly of the prior art.

[0022] The reference signs are as follows:

[0023] 1, valve plate; 11, first plate body; 12, second plate body; 2, valve plate; 21, first plate body; 22, second plate body; 3, air suction port; 4, air exhaust channel; 5, air inlet; 6, air outlet; 7, groove; 8, buffer cavity; 9, air hole; 10, connecting part; 13, mounting groove; 14, cylinder cover; 15, cylinder; 16, piston; 17, air suction valve plate; 18, air exhaust valve plate; 19, lift limiter. DETAILED DESCRIPTION

[0024] With reference to Figures 1 to 7 As shown in the drawings, according to the embodiment of the present application, a valve assembly is provided, comprising a valve plate 1 and a valve piece 2, the valve plate 1 is configured with an air suction port 3 and an exhaust passage 4, the valve piece 2 is arranged on the valve plate 1, the valve piece 2 comprises a first piece body 21 for opening or closing the air suction port 3 and a second piece body 22 for opening or closing the exhaust passage 4, when the first piece body 21 opens the air suction port 3, the second piece body 22 is closed under the driving of the first piece body 21, when the second piece body 22 opens the exhaust passage 4, the first piece body 21 is closed under the driving of the second piece body 22. In this technical solution, the first piece body 21 is equivalent to an air suction valve piece, and the second piece body 22 is equivalent to an exhaust valve piece, the air suction valve piece and the exhaust valve piece originally separated are connected together to make an integrally formed valve piece 2. When the valve assembly of the present application is applied in a piston compressor, when the compressor is switched from exhaust to suction, the first piece body 21 opens the air suction port 3, and under the overall linkage action of the valve piece 2, the second piece body 22 is immediately closed under the driving of the first piece body 21, when the compressor is switched from suction to exhaust, the second piece body 22 opens the exhaust passage 4, and under the overall linkage action of the valve piece 2, the first piece body 21 is immediately closed under the driving of the second piece body 22, thereby solving the problems of the exhaust valve piece delayed closing when the compressor is switched from exhaust to suction, and the air suction valve piece delayed closing when the compressor is switched from suction to exhaust in the prior art, so that the refrigerating capacity and performance of the compressor are improved. At the same time, compared with the air suction valve piece and the exhaust valve piece designed separately in the prior art, the valve piece 2 of the present application has a smaller volume and consumes less material, further reducing the cost of the compressor.

[0025] With reference to Figure 1As shown, the valve plate 1 comprises a first plate body 11 and a second plate body 12 connected with each other, and a certain included angle is formed between the first plate body 11 and the second plate body 12, which is 90° in this embodiment, and of course the included angle formed between the first plate body 11 and the second plate body 12 can also be designed as other angles. The suction port 3 is on the first plate body 11, one end of the exhaust passage 4 forms the intake port 5, and the other end of the exhaust passage 4 forms the exhaust port 6. The intake port 5 is on the first plate body 11, and the exhaust port 6 is on the second plate body 12. When the valve assembly of the present application is assembled in the piston compressor, the first plate body 11 faces the compression chamber of the compressor, which makes the suction port 3 and the intake port 5 of the exhaust passage 4 correspond to the compression chamber, and the second plate body 12 is in the cylinder head 14, so that the exhaust port 6 of the exhaust passage 4 corresponds to the inside of the cylinder head 14. The included angle formed between the first plate body 11 and the second plate body 12 matches the included angle formed between the first piece 21 and the second piece 22. In this way, the first piece 21 can be tightly attached to the first plate body 11, and the second piece 22 can be tightly attached to the second plate body 12, further ensuring the sealing performance during suction and exhaust. Of course, the included angle formed between the first piece 21 and the second piece 22 refers to the angle formed between the two in a free state.

[0026] Specifically, the valve plate 1 is also provided with a groove 7 extending from the first plate body 11 to the second plate body 12, and the valve piece 2 is installed in the groove 7, and preferably, the valve piece 2 matches the groove 7. The structure of the groove 7 makes it more convenient to install the valve piece 2, and at the same time, the valve piece 2 has the effect of being embedded in the valve plate 1, further ensuring the sealing performance during suction and exhaust.

[0027] For reference Figure 1 and Figure 2 As shown, the groove 7 is provided with a buffer cavity 8 on the groove bottom wall, the buffer cavity 8 is on the second plate body 12, the exhaust passage 4 communicates with the buffer cavity 8 through the exhaust port 6, and the second piece 22 of the valve piece 2 is finally used to open or close the buffer cavity 8. The gas in the compression chamber enters the exhaust passage 4 from the intake port 5, and then enters the buffer cavity 8 through the exhaust port 6. After a certain period of accumulation in the buffer cavity 8, the gas will push open the second piece 22, so that the high-pressure gas enters the cylinder head 14. The structure of the buffer cavity 8 helps the gas in the compression chamber to be compressed to a higher pressure before it pushes open the second piece 22 to enter the cylinder head 14, rather than immediately after the piston 16 compresses the gas, the gas in the compression chamber immediately passes through the exhaust passage 4 to impact the second piece 22 to enter the cylinder head 14.

[0028] For reference Figure 1As shown, the groove 7 is in the central position of the valve plate 1, the number of exhaust passages 4 is two, and the two exhaust passages 4 are symmetrically distributed relative to the groove 7, that is, the two exhaust passages 4 are symmetrically distributed on the valve plate 1. Among them, the two air inlets 5 of the exhaust passage 4 are symmetrically distributed on the left and right sides of the groove 7, and the two air outlets 6 of the exhaust passage 4 are both communicated to the buffer cavity 8, and the two air outlets 6 are centrally symmetric relative to the central axis of the buffer cavity 8. The two symmetrical exhaust passages 4 make the valve plate 1 more uniform when the compressor is exhausted.

[0029] In the embodiment, the first plate body 11 is also provided with an air passage 9 penetrating through the first plate body 11. After the valve assembly is assembled in the compressor, one end of the air passage 9 is communicated with the inside of the cylinder cover 14, and the other end of the air passage 9 is communicated with the muffling cavity beside the cylinder 15. The structure of the air passage 9 ensures that the high-pressure gas discharged into the cylinder cover 14 enters the muffling cavity for sound attenuation treatment before flowing out of the compressor. As another embodiment, the air passage 9 can also be constructed on the cylinder cover 14, and the air passage 9 also leads to the muffling cavity beside the cylinder 15, so that the high-pressure gas in the cylinder cover 14 can be sound attenuation treated before flowing out of the compressor.

[0030] For reference, Figure 1 As shown, the valve plate 1 also has two connecting parts 10, and the two connecting parts 10 are respectively located on the two sides of the connecting part between the first piece 21 and the second piece 22. The valve plate 1 is also provided with two mounting grooves 13 distributed on the left and right sides of the groove 7, and the two connecting parts 10 can be respectively installed in the two mounting grooves 13 by clamping, welding, bonding or the like. The first piece 21 and the second piece 22 are linked with the two connecting parts 10 as the shaft. When the first piece 21 opens the air inlet 3, the second piece 22 will not only immediately close the buffer cavity 8, but also seal the buffer cavity 8 more tightly under the driving of the first piece 21, so that the sealing effect is better. When the second piece 22 opens the buffer cavity 8, the first piece 21 will also immediately close the air inlet 3 and seal the air inlet 3 more tightly under the driving of the second piece 22.

[0031] Specifically, the valve plate 2 is made of valve plate steel. The valve plate steel is a commonly used material for producing the valve plate 2 in the art, which can not only withstand high-frequency bending and impact load, but also has a certain elasticity. The first piece 21 and the second piece 22 can be immediately opened or closed, and in addition to the linkage effect, the elasticity of the valve plate 2 itself also plays a great role. Compared with conventional air inlet valve plates and exhaust valve plates, the valve plate 2 of the present application has a self-rebound force from two aspects, so the rebound is strengthened, the valve plate 2 acts quickly, thereby further reducing the occurrence of the delay closing phenomenon of the valve plate 2, and greatly ensuring the performance of the compressor.

[0032] Preferably, the thickness of the valve plate 2 is 0.1 to 1.0 mm, which ensures that the valve plate 2 has a certain strength and good elasticity, so that the valve plate 2 can be quickly opened under the action of the air pressure difference during intake and exhaust.

[0033] See also Figure 4 As shown in the figure, the direction indicated by the arrow is the movement direction of the piston 16. When the piston 16 moves to the top dead center, that is, during the exhaust process of the compressor, the first plate 21 of the valve plate 2 is always in the groove 7 and is tightly fitted with the first plate 11. The first plate 21 fully covers the intake port 3. At the same time, the second plate 22 of the valve plate 2 is in an open state. Its lift is limited by the limit structure on the cylinder head 14, and the gas in the compression chamber is discharged into the cylinder head 14. Figure 5 As shown in the figure, the direction indicated by the arrow is the movement direction of the piston 16. When the piston 16 moves to the bottom dead center, that is, during the suction process of the compressor, the second plate 22 of the valve plate 2 is always in the groove 7 and is tightly fitted with the second plate 12. The second plate 22 fully covers the buffer chamber 8. At the same time, the first plate 21 of the valve plate 2 is in an open state, and gas is sucked into the compression chamber.

[0034] The present invention also provides a piston compressor comprising the valve assembly.

[0035] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A valve assembly, characterized by The valve assembly comprises a valve plate (1) and a valve piece (2), the valve plate (1) is provided with an air inlet (3) and an exhaust passage (4), the valve piece (2) is arranged on the valve plate (1), the valve piece (2) comprises a first piece (21) for opening or closing the air inlet (3) and a second piece (22) for opening or closing the exhaust passage (4), when the first piece (21) opens the air inlet (3), the second piece (22) closes the exhaust passage (4) under the driving of the first piece (21), when the second piece (22) opens the exhaust passage (4), the first piece (21) closes the air inlet (3) under the driving of the second piece (22); The valve plate (1) comprises a first plate (11) and a second plate (12) connected with each other, the air inlet (3) is on the first plate (11), one end of the exhaust passage (4) forms an air inlet (5), the other end of the exhaust passage (4) forms an exhaust port (6), the air inlet (5) is on the first plate (11), the exhaust port (6) is on the second plate (12), the included angle between the first plate (11) and the second plate (12) matches the included angle between the first piece (21) and the second piece (22).

2. The valve assembly of claim 1, wherein, The valve plate (1) is further provided with a groove (7), the groove (7) extends from the first plate (11) to the second plate (12), and the valve piece (2) is installed in the groove (7).

3. The valve assembly of claim 2, wherein, The groove (7) is provided with a buffer cavity (8) on the groove bottom wall, the buffer cavity (8) is on the second plate (12), and the exhaust passage (4) communicates with the buffer cavity (8) through the exhaust port (6).

4. The valve assembly of claim 2, wherein, The number of the exhaust passages (4) is two, and the two exhaust passages (4) are symmetrically distributed relative to the groove (7).

5. The valve assembly of claim 1, wherein, The first plate (11) is further provided with a ventilation hole (9) penetrating through the first plate (11), after the valve assembly is assembled in a compressor, one end of the ventilation hole (9) communicates with the inside of a cylinder head (14), and the other end of the ventilation hole (9) communicates with a sound attenuation cavity.

6. The valve assembly of claim 1, wherein, The valve plate (1) is further provided with a connecting portion (10), the connecting portion (10) is at the connection between the first piece (21) and the second piece (22), and the valve plate (1) is further provided with a mounting groove (13), and the connecting portion (10) is installed in the mounting groove (13).

7. The valve assembly of any one of claims 1 to 6, wherein, The material of the valve piece (2) is valve piece steel.

8. The valve assembly of any one of claims 1 to 6, wherein, The thickness of the valve piece (2) is 0.1-1.0 mm.

9. A piston compressor, characterized by The valve assembly comprises the valve assembly according to any one of claims 1-8.

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