Compressor exhaust structure, compressor

Abstract

The application provides a compressor exhaust structure and a compressor, wherein the compressor exhaust structure comprises a cylinder base, a piston and a cylinder cover, the cylinder base is provided with a cylinder hole, the piston is arranged in the cylinder hole, the cylinder cover is mounted on the cylinder base, the cylinder cover is provided with an inner cavity, and a first exhaust passage and a second exhaust passage are sequentially arranged on the cylinder base in the movement direction of the piston and are communicated with the cylinder hole; the outlet of the first exhaust passage and the outlet of the second exhaust passage are both communicated with the inner cavity of the cylinder cover. According to the application, the defect that the exhaust valve plate of the compressor in the prior art is delayed to be closed, which leads to the reduction of the refrigeration efficiency of the compressor, can be overcome, and the performance of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compressor exhaust structure and a compressor. BACKGROUND

[0002] The piston compressor is the core component of the refrigerator refrigeration, and the performance and reliability of the compressor directly determine the refrigeration effect. The pump body of the piston compressor mainly consists of a cylinder base, a crankshaft, a connecting rod, a piston, a cylinder head assembly and the like. During the operation of the compressor, the crankshaft rotates under the driving of the motor, and the piston is driven to make reciprocating motion in the cylinder through the connecting rod, thereby changing the volume of the cylinder to suck in low-pressure refrigerant and compress it. When the piston moves from the top dead center to the bottom dead center, the pressure inside the cylinder is less than the pressure outside the cylinder, and the refrigerant pushes open the suction valve plate to enter the inside of the cylinder, and after the suction is completed, the suction valve plate is closed to close the suction port. When the piston moves from the bottom dead center to the top dead center, the pressure inside the cylinder is greater than the pressure outside the cylinder, and the high-pressure refrigerant pushes open the exhaust valve plate through the valve plate exhaust port of the cylinder head assembly to exhaust, and after the exhaust is completed, the exhaust valve plate is closed to close the exhaust port, thereby completing the entire process of suction, compression and exhaust.

[0003] However, when the piston compressor is operated at a high frequency, the valve plate will be closed late due to insufficient rebound speed of the valve plate caused by too fast operation of the compressor, the pressure outside the cylinder is high, the pressure inside the cylinder is still in the compression stage or even in the suction stage, and the high pressure difference between the inside and outside of the pump body will cause the valve plate to have a large rebound force. At the moment when the valve plate contacts the valve seat, vibration of the compressor is caused, and the same situation also occurs in the rotor compressor and the scroll compressor, which affects the pipeline stability in the system, the system noise and the noise of the compressor itself. Currently, some manufacturers add a buffer plate to the exhaust valve plate or set a magnet to reduce the rebound force of the valve plate, but the incomplete opening of the valve plate will affect the refrigerating capacity of the piston compressor and the performance.

[0004] Since the compressor in the prior art has the technical problems of insufficient rebound speed of the valve plate when the compressor is operated too fast, late closing of the valve plate, and affecting the pipeline stability in the system, the system noise and the noise of the compressor itself, the present application researches and designs a compressor exhaust structure and a compressor. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defects of the prior art that the exhaust valve plate is closed late, which reduces the refrigeration efficiency of the compressor, so as to provide a compressor exhaust structure and a compressor.

[0006] In order to solve the above problems, the present application provides a compressor exhaust structure, which comprises:

[0007] The cylinder block has a cylinder bore, the piston is arranged in the cylinder bore, the cylinder head is mounted on the cylinder block, the cylinder head has an inner cavity, and in the movement direction of the piston, the first exhaust passage and the second exhaust passage are arranged on the cylinder block in sequence and communicate with the cylinder bore, and the outlet of the first exhaust passage and the outlet of the second exhaust passage both communicate with the inner cavity of the cylinder head.

[0008] In some embodiments, the second exhaust passage is at least one, and when the number of the second exhaust passages is greater than one, the second exhaust passage and the first exhaust passage are arranged on the cylinder block in sequence in the movement direction of the piston when the compressor is in the compression process.

[0009] In some embodiments, the compressor exhaust structure further comprises a valve plate, and the valve plate is located between the cylinder head and the cylinder block.

[0010] The second exhaust passage comprises a first communication hole, a second passage and a second communication hole, the second passage is arranged on the cylinder block, the first communication hole is arranged on the valve plate, and the second communication hole is arranged on the cylinder head, the second passage, the first communication hole and the second communication hole are sequentially communicated, the second cylinder head is provided with a second valve plate, and the second valve plate is located at the second communication hole.

[0011] In some embodiments, during the movement of the piston, the piston can block the inlet of the second exhaust passage, and the second valve plate can seal the outlet of the second exhaust passage.

[0012] In some embodiments, the cylinder head is provided with a mounting portion, the second valve plate is provided with a fixing member, and the fixing member is arranged on the mounting portion.

[0013] In some embodiments, the compressor exhaust structure further comprises a third valve plate, and the third valve plate is located between the valve plate and the cylinder block; the third valve plate is provided with a third communication hole, one end of the third communication hole communicates with the second passage, and the other end of the third communication hole communicates with the first communication hole.

[0014] In some embodiments, the compressor exhaust structure further comprises an exhaust passage, and the exhaust passage comprises a first passage, a sixth communication hole and a seventh communication hole, the first passage is arranged on the cylinder block, the seventh communication hole is arranged on the third valve plate, and the sixth communication hole is arranged on the valve plate, the first passage, the seventh communication hole and the sixth communication hole are sequentially communicated, and the inlet of the exhaust passage communicates with the inner cavity of the cylinder head.

[0015] In some embodiments, the first exhaust passage comprises a fourth communication hole and a fifth communication hole, the fourth communication hole is arranged on the third valve plate, the fifth communication hole is arranged on the valve plate, the fourth communication hole is communicated with the fifth communication hole, the valve plate is provided with a first valve plate, the first valve plate is located at the outlet of the fifth communication hole, and the valve plate is further provided with a limiting piece opposite to the first valve plate.

[0016] In some embodiments, the rigidity of the first valve plate is greater than that of the second valve plate, and the inner diameters of the first exhaust passage and the second exhaust passage are the same.

[0017] The application further provides a compressor comprising the compressor exhaust structure in any one of the preceding embodiments.

[0018] The compressor exhaust structure and the compressor provided by the application have the following beneficial effects:

[0019] The first exhaust passage and the second exhaust passage are sequentially arranged on the cylinder base in the movement direction of the piston and communicated with the cylinder hole, and the outlet of the first exhaust passage and the outlet of the second exhaust passage are both communicated to the inner cavity of the cylinder cover. During the exhaust process of the piston compressor, the piston moves from the bottom dead center to the top dead center. When the piston does not move to the second exhaust passage of the cylinder base, the second exhaust passage is opened at the same time as the first exhaust passage, and the refrigerant is discharged into the inner cavity of the cylinder cover and then discharged to the outside of the compressor through the outlet passage. When the piston moves to the second exhaust passage of the cylinder base, the inlet of the second exhaust passage is blocked by the piston, and the second exhaust passage is closed in advance. Only the first exhaust passage is in working condition in the last stroke of the piston, and the remaining refrigerant is discharged to the outside of the compressor through the outlet passage. The refrigerant in the cylinder hole is discharged through the first exhaust passage and the second exhaust passage, the flow of the refrigerant is increased, the first valve plate of the first exhaust passage and the second valve plate of the second exhaust passage rebound in time and with small rebound force, the backflow of the exhaust of the piston compressor is reduced, the delayed closing of the first valve plate is avoided, the refrigerating capacity is ensured, and the noise is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an exploded view of the compressor exhaust structure of the embodiment of the application;

[0021] Figure 2 It is a sectional view of the compressor exhaust structure of the embodiment of the application;

[0022] Figure 3 It is a structural schematic view of the cylinder cover in the compressor exhaust structure of the embodiment of the application;

[0023] Figure 4 It is a structural schematic view of the third valve plate in the compressor exhaust structure of the embodiment of the application;

[0024] Figure 5 Structure diagram of valve plate in compressor exhaust structure of embodiment of the present application;

[0025] Figure 6 Structure diagram of second valve plate in compressor exhaust structure of embodiment of the present application;

[0026] Figure 7 Structure diagram of cylinder cover in compressor exhaust structure of embodiment of the present application;

[0027] Figure 8 Assembly diagram of first valve plate in compressor exhaust structure of embodiment of the present application;

[0028] Figure 9 Assembly sectional view of compressor exhaust structure of embodiment of the present application;

[0029] Figure 10 is a partial enlarged view of Figure 9

[0030] The reference signs are represented as:

[0031] 1, cylinder base; 2, piston; 3, third valve plate; 4, valve plate; 5, first valve plate; 6, limiting piece; 7, second valve plate; 8, cylinder cover; 9, cylinder hole; 10, second passage; 11, first passage; 12, third communication hole; 13, fourth communication hole; 14, seventh communication hole; 15, first communication hole; 16, suction port; 17, fifth communication hole; 18, sixth communication hole; 19, fixing piece; 20, second communication hole; 21, mounting portion. DETAILED DESCRIPTION

[0032] Referring to Figures 1 to 10 According to the embodiment of the present application, a compressor exhaust structure is provided, which comprises a cylinder base 1, a piston 2 and a cylinder cover 8, the cylinder base 1 has a cylinder hole 9, the piston 2 is arranged in the cylinder hole 9, the cylinder cover 8 is mounted on the cylinder base 1, the cylinder cover 8 has an inner cavity, along the movement direction of the piston 2, the first exhaust passage and the second exhaust passage which are communicated with the cylinder hole 9 are arranged on the cylinder base 1 in sequence, the outlet of the first exhaust passage and the outlet of the second exhaust passage are both communicated to the inner cavity of the cylinder cover 8. In this technical solution, along the movement direction of the piston 2, the first exhaust passage and the second exhaust passage which are communicated with the cylinder hole 9 are arranged on the cylinder base 1 in sequence, the outlet of the first exhaust passage and the outlet of the second exhaust passage are both communicated to the inner cavity of the cylinder cover 8, so that the exhaust gas is discharged through the first exhaust passage and the second exhaust passage, and the exhaust gas is discharged through the first exhaust passage and the second exhaust passage, which can improve the exhaust efficiency of the compressor. Figure 1 ​As shown, the first exhaust passage and the second exhaust passage are sequentially arranged on the cylinder base 1 and communicate with the cylinder bore 9, and the outlet of the first exhaust passage and the outlet of the second exhaust passage both communicate with the inner cavity of the cylinder cover 8. During the exhaust process of the piston compressor, the piston 2 moves from the bottom dead center to the top dead center. When the piston 2 does not move to the second exhaust passage of the cylinder base, the second exhaust passage is opened at the same time as the first exhaust passage, and the refrigerant is discharged into the inner cavity of the cylinder cover 8 and then discharged to the outside of the compressor through the outlet passage. When the piston 2 moves to the second exhaust passage of the cylinder base, the inlet of the second exhaust passage is blocked by the piston 2, the second exhaust passage is closed in advance, only the first exhaust passage is in working condition during the last stroke of the piston 2, and the remaining refrigerant is discharged to the outside of the compressor through the outlet passage. The refrigerant is discharged through the first exhaust passage and the second exhaust passage, the flow of the refrigerant is increased, the second valve plate 7 of the first exhaust passage and the first valve plate 5 of the second exhaust passage rebound in time and with small rebound force, the backflow of the exhaust of the piston compressor is reduced, the first valve plate 5 is prevented from being closed for a long time, the refrigerating capacity is ensured, and the noise is reduced.

[0033] In some embodiments, the second exhaust passage is at least one. When the number of the second exhaust passages is greater than one, the second exhaust passage and the first exhaust passage are sequentially arranged on the cylinder base 1 along the movement direction of the piston 2 when the compressor is in the compression process. In this technical solution, the second exhaust passage can be provided in multiple numbers. When the number of the second exhaust passages is greater than one, the second exhaust passage and the first exhaust passage are sequentially arranged on the cylinder base 1 along the movement direction of the piston 2 when the compressor is in the compression process, that is, the first exhaust passage is located close to the top dead center of the piston 2, and the second exhaust passage and the first exhaust passage are sequentially arranged in the direction from the bottom dead center to the top dead center, so that the number of exhaust passages is sequentially reduced during the movement of the piston 2, the valve plate rebounds in time and with small rebound force when the refrigerant is discharged, the backflow of the exhaust of the piston compressor is reduced, and the refrigerating capacity is ensured.

[0034] In some embodiments, referring to Figure 2 As shown, the compressor exhaust structure further comprises a valve plate 4 located between the cylinder cover 8 and the cylinder base 1. The second exhaust passage comprises a first communication hole 15, a second passage 10 and a second communication hole 20. The second passage 10 is arranged on the cylinder base 1, and the first communication hole 15 is arranged on the valve plate 4. Referring to Figure 7As shown in the figure, the second communication hole 20 is arranged on the cylinder cover 8, the second channel 10, the first communication hole 15 and the second communication hole 20 are sequentially communicated, the second valve plate 7 is arranged on the cylinder cover 8, and the second valve plate 7 is located at the second communication hole 20. In the technical scheme, the second channel 10, the first communication hole 15 and the second communication hole 20 are sequentially communicated to form a second exhaust channel, the high-pressure refrigerant in the cylinder bore 9 is discharged into the inner cavity of the cylinder cover 8 through the second exhaust channel, and finally discharged out of the compressor through the exhaust channel. The second valve plate 7 is arranged on the cylinder cover 8, and the second valve plate 7 is located at the second communication hole 20. When the piston moves to the inlet of the second exhaust channel, the inlet of the second exhaust channel is blocked by the piston 2, the second valve plate 7 is closed in advance, and the compression effect in the cylinder bore 9 is ensured.

[0035] In some embodiments, referring to Figure 3 As shown in the figure, the compressor exhaust structure further comprises a third valve plate 3 located between the valve plate 4 and the cylinder base 1; a third communication hole 12 is arranged on the third valve plate 3, one end of the third communication hole 12 communicates with the second channel 10, and the other end communicates with the first communication hole 15. In the technical scheme, the third valve plate 3 is an air suction valve plate, the valve plate 4 is provided with an air suction port 16, and the valve plate 4 is opposite to the air suction port 16. The air suction channel of the compressor of the embodiment of the application is the same as that of a conventional compressor, which is used to close or open the air suction channel of the compressor. By arranging the third communication hole 12 on the third valve plate 3, the first communication hole 15, the second channel 10, the second communication hole 20 and the third communication hole 12 form a second exhaust channel.

[0036] In some embodiments, the compressor exhaust structure further comprises an exhaust channel, the exhaust channel comprises a first channel 11, a sixth communication hole 18 and a seventh communication hole 14, the first channel 11 is arranged on the cylinder base 1, the seventh communication hole 14 is arranged on the third valve plate 3, the sixth communication hole 18 is arranged on the valve plate 4, the first channel 11, the seventh communication hole 14 and the sixth communication hole 18 are sequentially communicated, and the inlet of the exhaust channel communicates with the inner cavity of the cylinder cover 8. In the technical scheme, referring to Figure 4 As shown in the figure, the exhaust channel comprises the first channel 11, the seventh communication hole 14 and the sixth communication hole 18, and the high-pressure refrigerant in the inner cavity of the cylinder cover 8 is discharged out of the compressor through the exhaust channel.

[0037] In some embodiments, the first exhaust channel comprises a fourth communication hole 13 and a fifth communication hole 17, the fourth communication hole 13 is arranged on the third valve plate 3, the fifth communication hole 17 is arranged on the valve plate 4, and the fourth communication hole 13 communicates with the fifth communication hole 17, in combination with Figure 8 and Figure 9As shown, the valve plate 4 is provided with a first valve plate 5 at the outlet of the fifth communication hole 17, and a limiting piece 6 opposite to the first valve plate 5. In this technical solution, as shown in Figure 5 As shown, the valve plate 4 is provided with a groove, the outlet of the fifth communication hole 17 is located at the groove bottom, and the first valve plate 5 and the limiting piece 6 are both located in the groove. When the refrigerant is discharged from the fifth communication hole 17, the refrigerant pushes the first valve plate 5 to open, so as to flow into the inner cavity of the cylinder head 8. The valve plate 4 is further provided with a limiting piece 6 opposite to the first valve plate 5. Through the limiting piece 6, the first valve plate 5 has a fast rebound speed and a small rebound force, which can reduce the backflow of the refrigerant, improve the refrigeration capacity of the compressor, reduce the noise, and improve the service life of the valve plate.

[0038] In some embodiments, the cylinder head 8 is provided with a mounting portion 21, the second valve plate 7 is provided with a fixing piece 19, and the fixing piece 19 is arranged on the mounting portion 21. In this technical solution, as shown in Figure 6 As shown, the fixing piece 19 and the mounting portion 21 are connected by welding or other fixing methods. The rigidity of the second valve plate 7 is smaller than that of the first valve plate 5, which ensures the sealing effect of the first valve plate 5 and the second valve plate 7, reduces the rebound force of the valve plate, and reduces the noise of the compressor.

[0039] In some embodiments, during the movement of the piston 2, the piston 2 can block the inlet of the second exhaust passage, and the second valve plate 7 can seal the outlet of the second exhaust passage. In this technical solution, as shown in Figure 10 As shown, the piston 2 reciprocates in the cylinder bore 9. When the piston 2 moves from the top dead center to the bottom dead center, the pressure inside the cylinder bore 9 decreases, the suction valve plate 3 is pushed open by the high-pressure refrigerant, and the refrigerant is sucked into the cylinder bore 9. When the piston 2 moves to the bottom dead center, the third valve plate 3 is closed, and the suction process of the compressor is completed.

[0040] The first valve plate 5 and the second valve plate 7 are elastic members, which can make the second exhaust passage of the cylinder head 8 in an open or closed state. When the piston 2 moves from the bottom dead center to the top dead center, the third valve plate 3 is closed, and the pressure inside the cylinder bore 9 gradually increases. When the pressure of the gas inside the cylinder bore 9 is greater than the pressure of the gas inside the cylinder head 8, the first valve plate 5 and the second valve plate 7 will be pushed open by the high-pressure refrigerant. The high-pressure refrigerant flows into the cylinder head 8 and is discharged through the valve plate 4. When the piston 2 moves to the second exhaust passage of the cylinder block 1, it will block the second exhaust passage of the cylinder block 1. The second valve plate 7 falls down, the second exhaust passage is closed, and the piston 2 will continue to move to the top dead center. When it moves to the top dead center, the high-pressure refrigerant inside the cylinder bore 9 is completely discharged, the first valve plate 5 falls down, the first exhaust passage is closed, and the entire exhaust process is completed.

[0041] In some embodiments, the rigidity of the first valve plate 5 is greater than the second valve plate 7, and the inner diameters of the first exhaust passage and the second exhaust passage are the same. In this embodiment, the inlet of the second exhaust passage is arranged at a distance of 3mm from the end surface of the cylinder hole 9, the first exhaust passage has a cross-sectional area diameter of 3mm, and the first exhaust passage has a cross-sectional area diameter of 3mm. The rigidity of the first valve plate 5 is greater than the second valve plate 7, the first valve plate 5 has a fast rebound speed and a small rebound force under the action of the limiting member 6, the backflow of the refrigerant can be reduced, the refrigeration capacity of the compressor is improved, the noise is reduced, and the exhaust structure of the variable frequency piston compressor is improved.

[0042] The application further provides a compressor comprising the above compressor exhaust structure.

[0043] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A compressor discharge structure, characterized by: The compressor exhaust structure comprises a cylinder block (1), a piston (2) and a cylinder head (8), the cylinder block (1) has a cylinder bore (9), the piston (2) is arranged in the cylinder bore (9), the cylinder head (8) is arranged on the cylinder block (1), the cylinder head (8) has an inner cavity, along the movement direction of the piston (2), the cylinder block (1) is sequentially provided with a first exhaust passage and a second exhaust passage which are communicated with the cylinder bore (9), the outlet of the first exhaust passage and the outlet of the second exhaust passage are both communicated to the inner cavity of the cylinder head (8). The compressor exhaust structure further comprises a valve plate (4), the valve plate (4) is located between the cylinder head (8) and the cylinder block (1). The second exhaust passage comprises a first communication hole (15), a second passage (10) and a second communication hole (20), the second passage (10) is arranged on the cylinder block (1), the first communication hole (15) is arranged on the valve plate (4), the second communication hole (20) is arranged on the cylinder head (8), the second passage (10), the first communication hole (15) and the second communication hole (20) are sequentially communicated, the cylinder head (8) is provided with a second valve plate (7), the second valve plate (7) is located at the second communication hole (20). The compressor exhaust structure further comprises a third valve plate (3), the third valve plate is located between the valve plate (4) and the cylinder block (1), the third valve plate (3) is provided with a third communication hole (12), one end of the third communication hole (12) is communicated with the second passage (10), and the other end of the third communication hole (12) is communicated with the first communication hole (15). During the exhaust process of the piston compressor, the piston (2) moves from the bottom dead center to the top dead center, when the piston (2) does not move to the second exhaust passage of the cylinder block, the second exhaust passage and the first exhaust passage are opened at the same time, the refrigerant is discharged into the inner cavity of the cylinder head (8), and then discharged to the outside of the compressor through the outlet passage; when the piston (2) moves to the second exhaust passage of the cylinder block, the inlet of the second exhaust passage is blocked by the piston (2), the second exhaust passage is closed in advance, only the first exhaust passage is in working state during the last stroke of the piston (2), the remaining refrigerant is discharged to the outside of the compressor through the outlet passage, the first exhaust passage is located close to the top dead center of the piston (2), along the direction from the bottom dead center to the top dead center, the second exhaust passage and the first exhaust passage are sequentially arranged, and the inlet of the second exhaust passage is located on the inner wall of the cylinder block (1). The second exhaust passage is at least one, when the number of the second exhaust passages is greater than one, during the compression process of the compressor, along the movement direction of the piston (2), the second exhaust passage and the first exhaust passage are sequentially arranged on the cylinder block (1).

2. The compressor discharge structure of claim 1, wherein: During the movement of the piston (2), the piston (2) can block the inlet of the second exhaust passage, and the second valve plate (7) can seal the outlet of the second exhaust passage.

3. The compressor discharge structure of claim 1, wherein: ​ 4. The compressor discharge structure of claim 1, wherein: The cylinder cover (8) is provided with a mounting portion (21), and the second valve plate (7) is provided with a fixing member (19), which is arranged on the mounting portion (21).

5. The compressor discharge structure of claim 1, wherein: The compressor exhaust structure further comprises an exhaust passage, which comprises a first passage (11), a sixth communication hole (18) and a seventh communication hole (14), the first passage (11) is arranged on the cylinder base (1), the seventh communication hole (14) is arranged on the third valve plate (3), and the sixth communication hole (18) is arranged on the valve plate (4), the first passage (11), the seventh communication hole (14) and the sixth communication hole (18) are sequentially communicated, and the inlet of the exhaust passage is communicated with the inner cavity of the cylinder cover (8).

6. The compressor discharge structure of claim 1, wherein: The first exhaust passage comprises a fourth communication hole (13) and a fifth communication hole (17), the fourth communication hole (13) is arranged on the third valve plate (3), and the fifth communication hole (17) is arranged on the valve plate (4), the fourth communication hole (13) is communicated with the fifth communication hole (17), the valve plate (4) is provided with a first valve plate (5), the first valve plate (5) is located at the outlet of the fifth communication hole (17), and the valve plate (4) is further provided with a limiting member (6), and the limiting member (6) is opposite to the first valve plate (5).

7. The compressor discharge structure of claim 6, wherein: The rigidity of the first valve plate (5) is greater than that of the second valve plate (7), and the inner diameters of the first exhaust passage and the second exhaust passage are the same.

8. A compressor characterized by: The compressor exhaust structure comprises the compressor exhaust structure according to any one of claims 1-7. The compressor exhaust structure comprises the compressor exhaust structure according to any one of claims 1-7.

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