Compressor exhaust structure and scroll compressor

Abstract

This application provides a compressor exhaust structure and a scroll compressor. The compressor exhaust structure includes a moving plate (1), a stationary plate (2), and a crankshaft (3). The stationary plate (2) is provided with a first exhaust passage (5) communicating with the compression chamber (8), the moving plate (1) is provided with a second exhaust passage (6) communicating with the compression chamber (8), and the crankshaft (3) is provided with a third exhaust passage (7). The inlet of the third exhaust passage (7) is connected to the second exhaust passage (6), and the outlet of the third exhaust passage (7) is connected to the inner cavity (9) of the compressor housing. According to the compressor exhaust structure of this application, the exhaust area of ​​the compressor can be increased, the exhaust performance of the compressor can be improved, and the problem of exhaust tooth wear of the compressor can be effectively improved.

Description

Technical Field

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

[0002] For scroll compressors, the pump body composed of the moving and stationary scrolls often greatly affects the overall performance of the compressor, including energy efficiency, reliability, noise, etc. Among them, the design of the scroll tooth profile has many limitations for the compressor. For example, increasing the exhaust angle can increase the compression ratio, but it will reduce the exhaust port area.

[0003] The exhaust port area is a relatively important design indicator for scroll compressors. At present, scroll compressors are mainly developed in the direction of increasing displacement. While the displacement increases, most scroll compressors do not want to increase the shell diameter, so they have to use the method of increasing the tooth height to achieve the same displacement. However, this method of increasing the tooth height cannot increase the area of ​​the exhaust port. This means that as the displacement increases, the exhaust port of the same area has to discharge more refrigerant. This will undoubtedly increase the power loss of the gas during exhaust. Similarly, it will also increase the reaction force of the gas on the scroll tooth head when the exhaust is pressed out of the exhaust port, making the tooth head more prone to deformation and wear, and reducing reliability. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a compressor exhaust structure and a scroll compressor, which can increase the exhaust area of ​​the compressor, improve the exhaust performance of the compressor, and effectively improve the problem of wear on the exhaust tooth head of the compressor.

[0005] In order to solve the above problems, the present application provides a compressor exhaust structure, including a moving plate, a stator and a crankshaft, a first exhaust channel connected to the compression chamber is provided on the stator, a second exhaust channel connected to the compression chamber is provided on the moving plate, and a third exhaust channel is provided on the crankshaft, an inlet of the third exhaust channel is connected to the second exhaust channel, and an outlet of the third exhaust channel is connected to the inner cavity of the compressor shell.

[0006] Preferably, the bottom of the moving plate has a moving plate bearing, the end of the crankshaft has an eccentric part, the moving plate bearing and the eccentric part are rotatably matched, an annular sealing structure is arranged between the bottom of the moving plate and the eccentric part, the annular sealing structure divides the space between the bottom of the moving plate and the eccentric part into an inner space and an outer space, and the second exhaust channel and the third exhaust channel are both connected to the inner space.

[0007] Preferably, the third exhaust passage comprises an axial section and a radial section, the axial section is communicated with the second exhaust passage, and the radial section is arranged at the exhaust end of the axial section and is communicated with the inner cavity of the housing.

[0008] Preferably, a drive motor is arranged on the crankshaft, and the radial section is located on a side of the drive motor away from the moving disk; or, a drive motor is arranged on the crankshaft, and the radial section is located on a side of the drive motor close to the moving disk.

[0009] Preferably, the bottom of the moving plate has a moving plate bearing, the inlet of the third exhaust passage is located on the side where the rotation axis of the crankshaft points to the central axis of the moving plate bearing, and the radial section is arranged on the side where the rotation axis of the crankshaft points to the central axis of the moving plate bearing.

[0010] Preferably, the distance between the outlet center of the second exhaust passage and the rotation axis of the crankshaft is equal to the eccentricity of the moving plate and the stationary plate.

[0011] Preferably, the second exhaust channel comprises an exhaust groove and a secondary exhaust port, the exhaust groove is communicated with the compression chamber, the secondary exhaust port is arranged at the bottom of the exhaust groove, and the secondary exhaust port is communicated with the third exhaust channel.

[0012] Preferably, when the moving disk rotates to the exhaust angle, the exhaust groove is located in the central cavity area surrounded by the contour lines of the moving disk and the static disk, and the auxiliary exhaust port is located within the range of the exhaust groove.

[0013] Preferably, the second exhaust passage comprises a secondary exhaust port, which penetrates the movable plate along the axial direction of the crankshaft, one end of the secondary exhaust port is communicated with the compression chamber, and the other end of the secondary exhaust port is communicated with the third exhaust passage.

[0014] Preferably, the compressor exhaust structure further includes an oil supply passage, the oil supply passage axially penetrates the crankshaft, and the oil supply passage is communicated with the outer space.

[0015] Preferably, one side of the eccentric portion has a cut edge, and the compressor exhaust structure further includes an oil supply channel, the inlet of the oil supply channel is arranged on the cut edge, and the outlet of the oil supply channel is located at the bottom of the crankshaft.

[0016] According to another aspect of the present application, a scroll compressor is provided, comprising a compressor exhaust structure, wherein the compressor exhaust structure is the above-mentioned compressor exhaust structure.

[0017] The compressor exhaust structure provided in the present application includes a moving plate, a stator and a crankshaft, wherein a first exhaust channel connected to the compression chamber is provided on the stator, a second exhaust channel connected to the compression chamber is provided on the moving plate, and a third exhaust channel is provided on the crankshaft, wherein the inlet of the third exhaust channel is connected to the second exhaust channel, and the outlet of the third exhaust channel is connected to the inner cavity of the compressor shell. The compressor exhaust structure adds a second exhaust channel on the moving plate and a third exhaust channel on the crankshaft, so that the exhaust gas in the compression chamber of the compressor can be discharged not only through the first exhaust channel on the stator, but also through the second exhaust channel on the moving plate. Therefore, when the compressor is at a large displacement, the exhaust area can be increased through the second exhaust channel on the moving plate, the exhaust power consumption of the compressor when the compressor is working at a large displacement can be reduced, the reaction force of the gas on the vortex tooth head can be reduced, the deformation and wear problem of the compressor exhaust tooth head can be effectively improved, the exhaust performance of the compressor can be improved, and the reliability of the compressor operation can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an enlarged view of a partial structure of a compressor exhaust structure according to an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a compressor exhaust structure according to an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a compressor exhaust structure according to an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the position of an exhaust passage of a compressor exhaust structure according to an embodiment of the present application;

[0022] Figure 5 A three-dimensional structural diagram of a moving disk of a compressor exhaust structure according to an embodiment of the present application;

[0023] Figure 6 A schematic diagram of a compressor exhaust structure according to an embodiment of the present application;

[0024] Figure 7 This is a partially enlarged structural diagram of the compressor exhaust structure of an embodiment of the present application.

[0025] The reference numerals are as follows:

[0026] 1. Moving plate; 2. Static plate; 3. Crankshaft; 4. Moving plate bearing; 5. First exhaust channel; 6. Second exhaust channel; 7. Third exhaust channel; 8. Compression chamber; 9. Inner cavity of shell; 10. Eccentric part; 11. Annular sealing structure; 12. Inner space; 13. Outer space; 14. Axial section; 15. Radial section; 16. Driving motor; 17. Exhaust groove; 18. Auxiliary exhaust port; 19. Oil supply channel; 20. Trimming. DETAILED DESCRIPTION

[0027] See also Figures 1 to 7 As shown, according to an embodiment of the present application, the compressor exhaust structure includes a moving plate 1, a stator plate 2 and a crankshaft 3, the stator plate 2 is provided with a first exhaust channel 5 connected to the compression chamber 8, the moving plate 1 is provided with a second exhaust channel 6 connected to the compression chamber 8, the crankshaft 3 is provided with a third exhaust channel 7, the inlet of the third exhaust channel 7 is connected to the second exhaust channel 6, and the outlet of the third exhaust channel 7 is connected to the shell cavity 9 of the compressor.

[0028] The exhaust structure of the compressor adds a second exhaust channel 6 on the moving disk 1 and a third exhaust channel on the crankshaft, so that the exhaust gas in the compression chamber of the compressor can be discharged not only through the first exhaust channel on the stator disk 2, but also through the second exhaust channel 6 on the moving disk 1. Therefore, when the compressor has a large displacement, the exhaust area can be increased through the second exhaust channel 6 on the moving disk 1, thereby reducing the exhaust power consumption of the compressor when working at a large displacement, reducing the reaction force of the gas on the vortex tooth head, and effectively improving the deformation and wear of the compressor exhaust tooth head. The exhaust performance of the compressor is improved, and the reliability of the compressor operation is improved.

[0029] In this embodiment, the compressor also includes a shell, an exhaust pipe is arranged on the shell, and the shell has an inner cavity. The exhaust pipe is connected with the inner cavity of the shell. After the exhaust of the compression chamber of the compressor enters the inner cavity of the shell, it is discharged from the exhaust pipe.

[0030] The moving plate 1 and the stationary plate 2 are matched to form a pump body, and the profiles of the moving plate 1 and the stationary plate 2 are meshed with each other to form a plurality of compression chambers, wherein the moving plate 1 revolves around the stationary plate 2.

[0031] An upper bracket is also provided in the shell, and the movable plate 1 is mounted on the upper bracket through an anti-rotation mechanism. The anti-rotation mechanism can prevent the movable plate 1 from rotating during the cooperation with the static plate 2, so that the movable plate 1 can only revolve around the static plate 2.

[0032] In one embodiment, the bottom of the moving plate 1 has a moving plate bearing 4, the end of the crankshaft 3 has an eccentric portion 10, the moving plate bearing 4 is rotatably matched with the eccentric portion 10, and an annular sealing structure 11 is arranged between the bottom of the moving plate 1 and the eccentric portion 10. The annular sealing structure 11 divides the space between the bottom of the moving plate 1 and the eccentric portion 10 into an inner space 12 and an outer space 13, and the second exhaust channel 6 and the third exhaust channel 7 are both connected to the inner space 12.

[0033] In this embodiment, the annular sealing structure 11 is located on the outer peripheral side of the outlet of the second exhaust channel 6, and can divide the space between the bottom of the moving disk 1 and the eccentric portion 10 into an inner space 12 and an outer space 13, so that the inner space 12 is isolated from the outer space 13, thereby effectively preventing the oil or non-exhaust pressure gas in the outer space 13 from entering the inner space 12, ensuring that the compressor exhaust can smoothly enter the shell cavity 9 through the second exhaust channel 6 and the third exhaust channel 7, thereby realizing simultaneous exhaust of the static disk 2 and the moving disk 1.

[0034] In this embodiment, the second exhaust channel 6 and the third exhaust channel 7 are always connected through the inner space 12. During the rotation of the compressor, the second exhaust channel 6 is connected to the gas compressed to the exhaust pressure in the pump body, so that a part of the exhaust gas can enter the third exhaust channel 7 from the second exhaust channel 6 through the inner space 12, and then be discharged from the third exhaust channel 7 to the shell inner cavity 9.

[0035] In one embodiment, the annular sealing structure 11 is, for example, an annular sealing ring, a sealing groove is provided on the end surface of the eccentric portion 10, and the annular sealing ring is installed in the sealing groove. The annular sealing structure 11 may also be other annular sealing structures such as a sealing ring.

[0036] In one embodiment, the third exhaust passage 7 includes an axial section 14 and a radial section 15, the axial section 14 is communicated with the second exhaust passage 6, and the radial section 15 is arranged at the exhaust end of the axial section 14 and communicated with the housing inner cavity 9. In this embodiment, the third exhaust passage 7 is an L-shaped structure, and after the exhaust gas enters the third exhaust passage 7, it first moves a certain distance along the axial direction through the axial section 14, and then leaves the crankshaft 3 in the radial direction through the radial section 15.

[0037] In one embodiment, a drive motor 16 is disposed on the crankshaft 3, and the radial section 15 is located on a side of the drive motor 16 away from the moving plate 1. In this embodiment, the radial section 15 is located below the drive motor 16, so the compressed refrigerant can be guided to the bottom of the drive motor 16 through the third exhaust passage 7, so that the refrigerant passes through the drive motor 16 during the process of flowing to the exhaust pipe, thereby effectively cooling the drive motor 16.

[0038] In the current related technology, it is proposed to add exhaust sheet metal parts to the casing to draw out a part of the exhaust gas flowing downward from the upper side of the compressor to the bottom, so that the motor can be better cooled. For this application, it is only necessary to control the position of the exhaust outlet without adding additional exhaust sheet metal parts to achieve the effect of drawing out the gas.

[0039] In one embodiment, a drive motor 16 is disposed on the crankshaft 3 , and the radial section 15 is located on a side of the drive motor 16 close to the moving plate 1 .

[0040] In one embodiment, the bottom of the moving plate 1 has a moving plate bearing 4, the inlet of the third exhaust channel 7 is located on the side where the rotation axis of the crankshaft 3 points to the central axis of the moving plate bearing 4, and the radial section 15 is arranged on the side where the rotation axis of the crankshaft 3 points to the central axis of the moving plate bearing 4.

[0041] The distance between the outlet center of the second exhaust passage 6 and the rotation axis of the crankshaft 3 is equal to the eccentricity of the moving plate 1 and the stationary plate 2 .

[0042] In this embodiment, the outlet of the second exhaust channel 6 of the moving plate 1 and the inlet of the third exhaust channel 7 on the crankshaft 3 coincide with each other in the axial direction, and the distance between the center of the circle of the two and the axis line is equal to the eccentricity, the outlet of the second exhaust channel 6 is opened at the center of the moving plate bearing 4, and the inlet of the third exhaust channel 7 on the crankshaft 3 is opened at the center of the eccentric portion 10 of the crankshaft 3. Therefore, during the rotation of the crankshaft 3, although the moving plate 1 does not rotate, the relative position of the outlet of the second exhaust channel 6 of the moving plate 1 and the inlet of the third exhaust channel 7 on the crankshaft 3 does not change. In this case, the moving plate 1 and the gas path on the crankshaft 3 do not move relative to each other, and the gas guide is relatively stable.

[0043] In actual use, even if the outlet of the second exhaust channel 6 and the inlet of the third exhaust channel 7 on the crankshaft 3 are not both located at the center of the eccentric portion 10, the two have relative movement. As long as the relative movement of the two is confined to the inner space 12, the compressor exhaust mechanism can exhaust normally.

[0044] The exhaust gas in the compression chamber 8 enters the third exhaust channel 7 of the crankshaft 3, and first moves downward in the axial direction, and then moves to the radial outlet and is discharged from the crankshaft 3. In the present application, the inlet of the third exhaust channel 7 is located on the side where the central axis of the crankshaft 3 points to the moving plate 1, and the outlet of the third exhaust channel 7 is also on this side, which makes the gas have a movement tendency to discharge the gas from the crankshaft 3 in the direction of the centrifugal force, thereby promoting the exhaust of the crankshaft 3.

[0045] In one embodiment, the second exhaust channel 6 includes an exhaust groove 17 and a secondary exhaust port 18 . The exhaust groove 17 is communicated with the compression chamber 8 . The secondary exhaust port 18 is disposed at the bottom of the exhaust groove 17 . The secondary exhaust port 18 is communicated with the third exhaust channel 7 .

[0046] Preferably, when the moving disk 1 rotates to the exhaust angle, the exhaust groove 17 is located in the central cavity area surrounded by the contour lines of the moving disk 1 and the static disk 2 , and the auxiliary exhaust port 18 is located within the range of the exhaust groove 17 .

[0047] In this embodiment, the cross-sectional area of ​​the exhaust groove 17 is greater than the cross-sectional area of ​​the auxiliary exhaust port 18, and the auxiliary exhaust port 18 completely falls within the range of the exhaust groove 17. Therefore, the exhaust groove 17 can be used to increase the communication angle between the auxiliary exhaust port 18 and the compression chamber 8, thereby ensuring stable communication between the auxiliary exhaust port 18 and the compression chamber 8.

[0048] In one embodiment, the compressor exhaust structure further includes an oil supply passage 19 , which axially penetrates the crankshaft 3 and is connected to the outer space 13 , thereby being able to supply oil to the axial space between the moving plate bearing 4 and the eccentric portion 10 .

[0049] In one embodiment, the second exhaust channel 6 includes a secondary exhaust port 18, and the secondary exhaust port 18 penetrates the moving plate 1 along the axial direction of the crankshaft 3. One end of the secondary exhaust port 18 is connected to the compression chamber 8, and the other end is connected to the third exhaust channel 7. In this embodiment, the exhaust groove is completely opened as the secondary exhaust port 18. In this case, the secondary exhaust port will move relative to the eccentric portion 10 of the crankshaft 3. Therefore, it is necessary to increase the area of ​​the inner space 12 so that when the secondary exhaust port 18 moves relative to the eccentric portion 10 during operation, it will never exceed the area range of the inner space 12. At the same time, the aperture of the third exhaust channel 7 on the crankshaft 3 is also enlarged accordingly, and is opened at the center of the end face of the eccentric portion 10. The exhaust structure of the embodiment of the present application can maximize the exhaust area of ​​the secondary exhaust port 18 and maximize the exhaust effect.

[0050] In one embodiment, one side of the eccentric portion 10 has a cut edge 20 , and the compressor exhaust structure further includes an oil supply channel 19 , the inlet of the oil supply channel 19 is arranged on the cut edge 20 , and the outlet of the oil supply channel 19 is located at the bottom of the crankshaft 3 .

[0051] In one embodiment, the auxiliary exhaust port 18 is a circular hole, and the cross section of the inner space 12 is circular. For this embodiment, when the aperture of the auxiliary exhaust port 18 increases, the exhaust area increases, the aperture of the inner space 12 also needs to be increased accordingly, and the outer diameter of the annular sealing structure 11 will also increase, which will affect the setting space of the oil supply channel 19. Therefore, in order to ensure the smooth setting of the oil supply channel 19, the inlet of the oil supply channel 19 is set on the cutting edge 20, and the channel formed by the cutting edge 20 and the movable plate bearing 4 is connected to the outer space 13, so that the oil supply channel 19 can be connected to the outer space 13 through the channel. Since the port of the oil supply channel 19 is not set on the end face of the eccentric part 10, it will not conflict with the setting position of the annular sealing structure 11, ensuring the smooth setting of the oil supply channel 19.

[0052] In this embodiment, during the operation of the compressor, the suction air is compressed by the pump body, and is discharged upward from the compressor through the first exhaust channel 5 of the static plate 2, and is guided by the shell, passes through the pump body and enters the high-pressure chamber downward. Another exhaust air enters the crankshaft 3 from the second exhaust channel 6 at the bottom of the driven plate 1, and then is thrown into the high-pressure chamber connected to the exhaust pipe in the horizontal direction as the crankshaft 3 rotates. Since the refrigerant flowing from the crankshaft 3 does not need to go through multiple rebounds of the shell and is directly discharged into the high-pressure chamber, this part of the high-pressure chamber has a smaller exhaust resistance, which is more conducive to exhaust.

[0053] According to an embodiment of the present application, the scroll compressor includes a compressor exhaust structure, which is the compressor exhaust structure mentioned above.

[0054] 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.

[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A compressor exhaust structure, characterized in that: The invention comprises a moving plate (1), a stationary plate (2) and a crankshaft (3), wherein the stationary plate (2) is provided with a first exhaust passage (5) communicating with a compression chamber (8), the moving plate (1) is provided with a second exhaust passage (6) communicating with the compression chamber (8), the crankshaft (3) is provided with a third exhaust passage (7), the inlet of the third exhaust passage (7) is communicated with the second exhaust passage (6), and the outlet of the third exhaust passage (7) is communicated with the inner chamber (9) of the compressor shell; the bottom of the moving plate (1) has a moving plate shaft The crankshaft (3) has an eccentric portion (10) at its end, the movable plate bearing (4) is rotatably matched with the eccentric portion (10), an annular sealing structure (11) is provided between the bottom of the movable plate (1) and the eccentric portion (10), the annular sealing structure (11) divides the space between the bottom of the movable plate (1) and the eccentric portion (10) into an inner space (12) and an outer space (13), and the second exhaust passage (6) and the third exhaust passage (7) are both connected to the inner space (12); The third exhaust passage (7) comprises an axial section (14) and a radial section (15), the axial section (14) being in communication with the second exhaust passage (6), and the radial section (15) being arranged at an exhaust end of the axial section (14) and in communication with the housing inner cavity (9); The bottom of the moving plate (1) is provided with a moving plate bearing (4); the inlet of the third exhaust passage (7) is located on a side where the rotation axis of the crankshaft (3) points to the central axis of the moving plate bearing (4); and the radial section (15) is arranged on a side where the rotation axis of the crankshaft (3) points to the central axis of the moving plate bearing (4); The distance between the outlet center of the second exhaust passage (6) and the rotation axis of the crankshaft (3) is equal to the eccentricity between the moving plate (1) and the stationary plate (2); One side of the eccentric portion (10) has a cut edge (20), and the compressor exhaust structure further comprises an oil supply channel (19), the inlet of the oil supply channel (19) is arranged on the cut edge (20), and the outlet of the oil supply channel (19) is located at the bottom of the crankshaft (3).

2. The compressor exhaust structure according to claim 1, characterized in that: The crankshaft (3) is provided with a drive motor (16), and the radial section (15) is located on a side of the drive motor (16) away from the moving disc (1); or, the crankshaft (3) is provided with a drive motor (16), and the radial section (15) is located on a side of the drive motor (16) close to the moving disc (1).

3. The compressor exhaust structure according to claim 1, characterized in that: The second exhaust channel (6) comprises an exhaust groove (17) and a secondary exhaust port (18), the exhaust groove (17) being in communication with the compression chamber (8), the secondary exhaust port (18) being arranged at the bottom of the exhaust groove (17), and the secondary exhaust port (18) being in communication with the third exhaust channel (7).

4. The compressor exhaust structure according to claim 3, characterized in that: When the moving disc (1) rotates to the exhaust angle, the exhaust groove (17) is located in a central cavity area surrounded by the contour lines of the moving disc (1) and the contour lines of the stationary disc (2), and the auxiliary exhaust port (18) is located within the range of the exhaust groove (17).

5. The compressor exhaust structure according to claim 1, characterized in that: The second exhaust passage (6) comprises a secondary exhaust port (18), the secondary exhaust port (18) penetrating the movable plate (1) along the axial direction of the crankshaft (3), one end of the secondary exhaust port (18) being in communication with the compression chamber (8), and the other end of the secondary exhaust port (18) being in communication with the third exhaust passage (7).

6. The compressor exhaust structure according to claim 1, characterized in that: The oil supply passage (19) penetrates the crankshaft (3) in the axial direction, and the oil supply passage (19) is in communication with the outer space (13).

7. A scroll compressor, comprising a compressor exhaust structure, characterized in that: The compressor exhaust structure is the compressor exhaust structure according to any one of claims 1 to 6.

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