Scroll compressor

Abstract

The invention provides a scroll compressor which comprises a shell (100) and a compression assembly (200) contained in an inner cavity (110) of the shell (100), the compression assembly (200) comprises a static scroll plate fixed to the shell (100) and a movable scroll plate (230) matched with the static scroll plate and movably arranged, and a compression cavity is formed between the static scroll plate and the movable scroll plate (230); the transmission assembly (300) comprises a main shaft (310) and a transmission disc (320), the transmission disc (320) is connected to the orbiting scroll (230), and the main shaft (310) is used for driving the orbiting scroll (230) to revolve through the transmission disc (320); and an anti-rotation assembly (400), wherein the anti-rotation assembly (400) is used for preventing the rotation of the transmission disc (320).

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and more particularly, to a scroll compressor. Background Art

[0002] The improvements of existing scroll compressors mainly focus on increasing the suction volume and improving the compression efficiency. Existing scroll compressors often use a single moving scroll and a single stationary scroll to compress the medium. Therefore, there is a problem of pressure imbalance between the compression chamber side and the anti-rotation hole side of the moving scroll, and the pressure imbalance will cause the axial movement of the moving scroll and thus increase the noise and wear of the moving scroll during operation. With the improvement of scroll compressors, an improved design has emerged in which a stationary scroll is provided on each side of the moving scroll. However, this design requires a drive shaft to pass through at least one stationary scroll to connect to the moving scroll, which inevitably exposes the drive shaft to the compressed medium (especially the high-pressure medium after compression), which will have an adverse effect on the drive shaft and the lubricating oil film on the surface of the drive shaft, and the lubricating oil film on the surface of the drive shaft may in turn contaminate the medium. Therefore, in the above improved design, there is still a risk that the lubricating oil film cannot effectively lubricate the drive shaft for a long time, resulting in increased wear of the drive shaft and contamination of the medium by the lubricating oil.

[0003] Therefore, in this field, there is an urgent need for a scroll compressor that can improve the pressure balance on both sides of the moving scroll and ensure that the compressed medium and the lubricating oil do not affect each other. Summary of the Invention

[0004] To solve the above problems in the prior art, the present invention provides a scroll compressor, which includes a housing and the following components accommodated in the internal chamber of the housing: a compression assembly, the compression assembly includes a stationary scroll fixed to the housing and a moving scroll that cooperates with the stationary scroll and is movably arranged, a compression chamber is provided between the stationary scroll and the moving scroll; a transmission assembly, the transmission assembly includes a main shaft and a transmission disk, the transmission disk is connected to the moving scroll, and the main shaft is used to drive the moving scroll to revolve through the transmission disk; and an anti-rotation assembly, the anti-rotation assembly is used to prevent the transmission disk from rotating self.

[0005] The present invention can be embodied in the schematic embodiments in the drawings. However, it should be noted that the drawings are only schematic, and any changes conceived under the teachings of the present invention should be considered to be included within the scope of the present invention. Brief Description of the Drawings

[0006] The drawings illustrate exemplary embodiments of the present invention. These drawings should not be construed as necessarily limiting the scope of the present invention, where:

[0007] Figure 1Is a partial cross-sectional perspective view of a scroll compressor according to an embodiment of the present invention;

[0008] Figure 2 Is Figure 1 A cross-sectional view of some components of the scroll compressor shown;

[0009] Figure 3 Is a cross-sectional view of some components of a scroll compressor according to another embodiment of the present invention;

[0010] Figure 4 Is a cross-sectional view of some components of a scroll compressor according to yet another embodiment of the present invention;

[0011] Figure 5 Is Figures 1-4 A schematic perspective view of the drive assembly of the scroll compressor shown;

[0012] Figure 6 Is Figures 1-5 A schematic perspective view of the auxiliary shaft of the drive assembly of the scroll compressor shown;

[0013] Figure 7 Is Figures 1-4 A schematic cross-sectional view of the first moving scroll and the first stationary scroll of the scroll compressor shown in the first position;

[0014] Figure 8 Is Figures 1-4 A schematic cross-sectional view of the first moving scroll and the first stationary scroll of the scroll compressor shown in the second position; and

[0015] Figure 9 Is Figures 1-4 A schematic cross-sectional view of the first moving scroll and the first stationary scroll of the scroll compressor shown in the third position. Detailed Embodiments

[0016] Further features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the drawings, and the various drawings are not necessarily drawn to actual scale. However, the present invention can be implemented in many different forms and should not be construed as necessarily limited to the exemplary embodiments disclosed herein. On the contrary, these exemplary embodiments are provided only to illustrate the present invention and to convey the spirit and essence of the present invention to those skilled in the art.

[0017] The present invention aims to provide a scroll compressor with a novel design. Due to this novel design, the pressures on both sides of the orbiting scroll can be kept balanced during the medium compression process. As a result, not only can the reliable operation of the scroll compressor be ensured, but also problems such as axial movement, vibration, and noise caused by the tipping moment during operation of the orbiting scroll can be effectively suppressed, thereby improving the working performance of the scroll compressor. Additionally, due to its novel design, the scroll compressor according to the present invention can isolate the medium from the main shaft, thereby protecting the lubricating oil film on the surface of the main shaft from being damaged by the medium (especially the high-pressure medium after compression) or even contaminating the medium conversely. The protection of the lubricating oil film on the surface of the main shaft can not only ensure the reliable operation of the main shaft, but also reduce the wear of the main shaft and components connected to the main shaft, such as bearings, thereby extending the service life of each component including the main shaft. Therefore, the scroll compressor according to the present invention not only has improved working performance but also has an extended service life.

[0018] The following describes in detail several optional but non-limiting embodiments of the scroll compressor according to the present invention with reference to the respective drawings.

[0019] Refer to Figure 1 , which shows a partial cross-sectional perspective view of a scroll compressor according to an embodiment of the present invention. As Figure 1As shown, the scroll compressor 10 mainly includes a housing 100, a compression assembly 200, a transmission assembly 300, and an anti-rotation assembly 400. Among them, the housing 100 defines an internal chamber 110 inside. The compression assembly 200, the transmission assembly 300, and the anti-rotation assembly 400 are accommodated in the internal chamber 110, and the transmission assembly 300 cooperates with the anti-rotation assembly 400 to drive the compression assembly 200. The compression assembly 200 may include a first stationary scroll 210 and a second stationary scroll 220 fixedly disposed in the internal chamber 110, and a moving scroll 230 movably disposed in the internal chamber 110. The first stationary scroll 210 and the second stationary scroll 220 may be connected to the housing 100 in the internal chamber 110 by fasteners such as bolts, screws, rivets, etc., so as to be fixed in the internal chamber 110. The moving scroll 230 is axially positioned between the first stationary scroll 210 and the second stationary scroll 220 along the axial direction XX', that is, the first stationary scroll 210 and the second stationary scroll 220 are located on opposite or relative sides of the moving scroll 230 along the axial direction XX' (i.e., the first side facing the first stationary scroll 210 and the second side facing the second stationary scroll 220), and the moving scroll 230 can rotate relative to the first stationary scroll 210 and the second stationary scroll 220. Thus, as will be described in detail below, the medium (e.g., coolants such as R744, R134A, R290, etc.) can be compressed on both sides of the moving scroll 230 through the cooperation of the moving scroll 230 with both the first stationary scroll 210 and the second stationary scroll 220. The transmission assembly 300 may include a main shaft 310 rotatably disposed in the internal chamber 110, and the main shaft 310 may be coupled to the rotor of an electric motor (not shown). Additionally, as will be described in detail below, the anti-rotation assembly 400 may include a plurality of struts 410 and a plurality of anti-rotation holes 420.

[0020] As used herein, terms such as "axial direction", "radial direction", "circumferential direction", etc. have their ordinary meanings in the art. Specifically, the axial direction XX' may be a direction parallel or coincident with the rotation axis of the main shaft 310, that is, it may be defined by the rotation axis of the main shaft 310; the radial direction may be any direction perpendicular to the rotation axis of the main shaft 310; and the circumferential direction may be any direction surrounding the rotation axis of the main shaft 310.

[0021] Continue to refer to Figure 1, the first stationary scroll disk 210 includes a first stationary disk body 211 fixedly connected to the housing 100 and a first stationary scroll body 212 protruding from one side of the first stationary disk body 211 and having a scroll shape. The second stationary scroll disk 220 includes a second stationary disk body 221 fixedly connected to the housing 100 and a second stationary scroll body 222 protruding from one side of the second stationary disk body 221 and having a scroll shape. And the moving scroll disk 230 includes a moving disk body 231 movably positioned between the first stationary scroll disk 210 and the second stationary scroll disk 220, and a first moving scroll body 232 and a second moving scroll body 233 protruding from both sides of the moving disk body 231 and having a scroll shape. Additionally, the end of the first stationary scroll body 212 abuts against the moving disk body 231, the end of the first moving scroll body 232 abuts against the first stationary disk body 211, and the side surface of the first moving scroll body 232 is joined to the side surface of the first stationary scroll body 212. Thus, the first stationary scroll body 212 and the first moving scroll body 232 define a plurality of compression cavities therebetween. These compression cavities are arranged along the scroll direction and are isolated from each other, and their volumes decrease as they approach the center of each scroll body. Similarly, the end of the second stationary scroll body 222 abuts against the moving disk body 231, the end of the second moving scroll body 233 abuts against the second stationary disk body 221, and the side surface of the second moving scroll body 233 is joined to the side surface of the second stationary scroll body 222. Thus, the second stationary scroll body 222 and the second moving scroll body 233 define a plurality of compression cavities therebetween. These compression cavities are arranged along the scroll direction and are isolated from each other, and their volumes decrease as they approach the center of each scroll body. As the moving scroll disk 230 moves relative to the first stationary scroll disk 210 and the second stationary scroll disk 220, each compression cavity on both sides of the moving scroll disk 230 will move along the scroll direction towards the center of the corresponding scroll body and its volume will gradually decrease. This causes the medium in each compression cavity to move towards the center of the corresponding scroll body and be gradually compressed as the moving scroll disk 230 moves. At the same time, the pressure of the medium will increase accordingly and reach the maximum when the medium moves to the center of the corresponding scroll body. Therefore, in order to discharge the high-pressure medium on both sides of the moving scroll disk 230, the first stationary disk body 211 of the first stationary scroll disk 210 is provided with a first through hole 213 extending through the center of its first stationary scroll body 212, and the moving disk body 231 of the moving scroll disk 230 is provided with a second through hole 234 connecting the centers of the first moving scroll body 232 and the second moving scroll body 233. Thus, the medium compressed on the first side of the moving scroll disk 230 can be discharged through the first through hole 213, and the medium compressed on the second side of the moving scroll disk 230 can pass through the second through hole 234 and then through the first through hole 213 to be discharged.

[0022] Under the above configuration, since the moving scroll 230 cooperates with two stationary scrolls on both sides to compress the medium, compared with the existing compressors that only compress the medium on one side of the moving scroll, the scroll compressor 10 according to the present invention can significantly reduce the pressure difference on both sides of the moving scroll 230, thereby suppressing problems such as axial movement, vibration, and noise of the moving scroll 230 during operation. This can not only improve the working performance of the scroll compressor 10, but also extend the service life of each component.

[0023] Specifically, the first stationary scroll body 212 and the second stationary scroll body 222 are symmetrically arranged about the moving disk body 231 and have the same height, and the first moving scroll body 232 and the second moving scroll body 233 are symmetrically arranged about the moving disk body 231 and have the same height. Under this configuration, each compression cavity defined by the first stationary scroll body 212 and the first moving scroll body 232 on the first side of the moving disk body 231 will be symmetric about the moving disk body 231 and have the same volume as each compression cavity defined by the second stationary scroll body 222 and the second moving scroll body 233 on the second side of the moving disk body 231. Since the medium pressures in the compression cavities with the same volume are the same, complete balance of the pressures on both sides of the moving disk body 231 can be achieved, thereby further suppressing problems such as axial movement, vibration, and noise of the moving scroll 230 during operation, and further improving the working performance of the scroll compressor 10 and extending the service life of each component.

[0024] To make the above compression process easier to understand, the first stationary scroll body 212 and the first moving scroll body 232 will be taken as an example for illustration below. Refer to Figures 7-9 , which shows a schematic cross-sectional view of the first moving scroll body 232 and the first stationary scroll body 212 at different positions. As Figures 7-9 shown, the first moving scroll body 232 and the first stationary scroll body 212 define two sets of compression cavities that are centrosymmetrically arranged about the center of the first stationary scroll body 212 between them. Among them, each set of compression cavities includes a first compression cavity 240a, a second compression cavity 240b, and a third compression cavity 240c that are arranged from the outside to the inside along the scroll direction and are isolated from each other. When the first moving scroll body 232 is in the Figure 7 shown first position, the first compression cavity 240a is open to receive the medium to be compressed in the first compression cavity 240a, and the second compression cavity 240b and the third compression cavity 240c are closed. When the first moving scroll body 232 moves from the Figure 7 shown first position to Figure 8When in the second position shown, the first compression cavity 240a moves towards the center of the first stationary scroll 212 and starts to close, and the second compression cavity 240b and the third compression cavity 240c move towards the center of the first stationary scroll 212 and their volumes decrease, so as to compress the medium received by each of them. When the first orbiting scroll 232 further moves from Figure 8 the second position shown to Figure 9 the third position shown, the first compression cavity 240a further moves towards the center of the first stationary scroll 212 and completes closing, and the second compression cavity 240b and the third compression cavity 240c further move towards the center of the first stationary scroll 212 and their volumes further decrease, so as to further compress the medium received by each of them. When the first orbiting scroll 232 further moves from Figure 9 the third position shown to Figure 7 the first position shown, the third compression cavity 240c completely discharges the medium therein and disappears, the second compression cavity 240b becomes the new third compression cavity 240c, the first compression cavity 240a becomes the new second compression cavity 240b, and a new first compression cavity 240a is generated.

[0025] Under the above configuration, through the movement of the first orbiting scroll 232, the medium can enter between the first stationary scroll 212 and the first orbiting scroll 232 from the radially outer side of them, then move towards the centers of the two scrolls and be compressed, and finally be discharged at the centers of the two scrolls. According to the above compression principle, through the cyclic movement of the first orbiting scroll 232, the two scrolls can continuously suck in, compress and discharge the medium. It should be noted that although the above-described compression principle takes the first stationary scroll 212 and the first orbiting scroll 232 as examples, those skilled in the art can understand that this compression principle is equally applicable to the second stationary scroll 222 and the second orbiting scroll 233. In addition, the number of compression cavities defined by the two scrolls is not necessarily fixed. For example, according to the specific structure of each scroll, each group of compression cavities in the two groups of compression cavities symmetrically arranged about the center of the scroll can include three, four or even more compression cavities. Therefore, the specific structure of the scroll cannot constitute a limitation to the protection scope of the present invention. From Figures 7-9 it can be seen that in order to compress the medium, the movement mode of the first orbiting scroll 232 is not to rotate around an axis or translate along a direction, but to revolve (also called translational motion) around an axis.

[0026] In order to convert the rotation of the main shaft 310 into the revolution of the first orbiting scroll 232, that is, the orbiting disk 230, refer to Figure 2 , which shows a cross-sectional view of some components of the scroll compressor shown in Figure 1 . As shown in Figure 1 andFigure 2 As shown, the transmission assembly 300 further includes a transmission disk 320, which is located on the side of the second stationary scroll disk 220 opposite to the moving scroll disk 230, such that the second stationary scroll disk 220 is located between the moving scroll disk 230 and the transmission disk 320. Additionally, the moving scroll disk 230 is fixedly connected to the transmission disk 320, and the transmission disk 320 is coupled to the main shaft 310, so that the motion from the main shaft 310 can be transmitted to the moving scroll disk 230 through the transmission disk 320.

[0027] The second stationary scroll disk 220 is provided with a plurality of struts 410 (e.g., cylindrical) protruding from the second stationary disk body 221 on the side opposite to the moving scroll disk 230. The second stationary disk body 221 is fixedly connected to the housing 100 through these struts 410, and the transmission disk 320 is provided with a plurality of anti-rotation holes 420 (e.g., circular). Among them, each anti-rotation hole 420 is extended through by a strut 410, and the radial dimension (e.g., diameter) of each anti-rotation hole 420 is larger than the radial dimension (e.g., diameter) of each strut 410. That is to say, the second stationary disk body 221 is fixedly connected to the housing 100 through a plurality of struts 410 extending through a plurality of anti-rotation holes 420 of the transmission disk 320, and there is a gap between the side wall of the anti-rotation hole 420 and the side wall of the strut 410 that allows the strut 410 to wobble in the anti-rotation hole 420. In this configuration, due to the cooperation of the plurality of anti-rotation holes 420 and the plurality of struts 410, the self-rotation of the transmission disk 320 is prevented, so that the transmission disk 320 can only revolve around the rotation axis of the main shaft 310 as the main shaft 310 rotates. Thus, the rotation of the main shaft 310 can be converted into the revolution of the transmission disk 320 and the moving scroll disk 320. That is to say, the main shaft 310 can drive the moving scroll disk 230 to revolve around the rotation axis of the main shaft 310 through the transmission disk 320, so that the moving scroll disk 230 interacts with the first stationary scroll disks 210 and the second stationary scroll disk 220 on both sides to compress the medium on both sides. Additionally, in this configuration, the second stationary scroll disk 220 can space the respective compression cavities from the main shaft 310, which can prevent the medium (especially the compressed high-pressure medium) in the respective compression cavities from contaminating or even damaging the main shaft 310 and the lubricating oil film on its surface, and can prevent the pressure fluctuations in the respective compression cavities from acting on the main shaft 310 and the lubricating oil film on its surface. Thereby, the noise, vibration, and wear generated during the rotation of the main shaft 310 can be reduced, further improving the working performance of the scroll compressor and extending its service life.

[0028] In particular, as Figure 1 and Figure 2As shown, the moving scroll 230 may include a connecting wall 235 that protrudes from the driven disk body 231 on the radially outer side of the second moving scroll body 233. The connecting wall 235 extends beyond the second stationary scroll 220 until the drive disk 320 and is fixedly connected to the drive disk 320 (e.g., by fasteners such as bolts, screws, rivets, etc.). That is to say, the moving scroll 230 can be fixedly connected to the drive disk 320 through its connecting wall 235. Additionally, the connecting wall 235 of the moving scroll 230 is spaced apart from the second stationary scroll 220 in the radial direction to allow the moving scroll 230 to move relative to the second stationary scroll 220. More particularly, the connecting wall 235 can be continuously arranged along the circumferential direction, for example, continuously arranged along the perimeter of the moving disk body 231, so that the connecting wall 235 is generally annular, thereby increasing the contact area between the connecting wall 235 and the drive disk 320, enabling the drive disk 320 to drive the moving scroll 230 more reliably and stably. Of course, in this case, the connecting wall 235 needs to be provided with a plurality of input holes 236 distributed along the circumferential direction to allow the medium to enter its inner side from the outer side of the connecting wall 235 and further enter between the second stationary scroll 220 and the moving scroll 230.

[0029] Reference Figure 3 , which shows a cross-sectional view of some components of a scroll compressor according to another embodiment of the present invention. Figure 3 The embodiment shown is different from Figure 1 and Figure 2 The embodiment shown in that, in addition to the connecting wall 235, the moving scroll 230 further includes a support wall 237 that protrudes from the driven disk body 231 opposite to the connecting wall 235. That is to say, the support wall 237 and the connecting wall 235 are symmetrically arranged on both sides of the moving disk body 231. Additionally, the support wall 237 can abut against the first stationary disk body 211 of the first stationary scroll 210 and is provided with a plurality of input holes 238. Each input hole 238 is symmetrically arranged with respect to each input hole 236 in the connecting wall 235 about the moving disk body 231 and has the same size. In this configuration, on the one hand, the medium needs to enter between the second stationary scroll body 222 and the second moving scroll body 233 through the input holes 236 in the connecting wall 235, and on the other hand, the medium needs to enter between the first stationary scroll body 212 and the first moving scroll body 232 through the input holes 238 in the support wall 237. The input holes 236 and input holes 238 that are symmetrically arranged about the moving disk body 231 and have the same size can ensure that the amount of medium entering between the two sets of scroll bodies is the same, thereby further ensuring the complete balance of the pressures on both sides of the moving disk body 231 to suppress problems such as axial movement, vibration, and noise of the moving scroll 230 during operation.

[0030] Reference Figure 4 , which shows a cross-sectional view of some components of a scroll compressor according to yet another embodiment of the present invention.Figure 4 The difference between the illustrated embodiment and Figures 1-3 the illustrated embodiment is that instead of being disposed on the second stationary disk body 221 of the second stationary scroll disk 220, a plurality of struts 410 are disposed on the drive disk 320 and are used to fixedly connect the drive disk 320 to the moving disk body 231 of the moving scroll disk 230, and instead of being disposed in the drive disk 320, a plurality of anti-rotation holes 420 are disposed in the second stationary disk body 221 of the second stationary scroll disk 220 for the plurality of struts 410 to pass through. In this configuration, the drive disk 320 can drive the moving scroll disk 230 to move through the plurality of struts 410, and the cooperation between the plurality of struts 410 and the plurality of anti-rotation holes 420 can prevent the moving scroll disk 230 from rotating on its own axis, so that the rotation of the main shaft 310 can be converted into the revolution of the moving scroll disk 230.

[0031] Combined with Figures 1-4 the embodiment of, it can be seen that the plurality of struts 410 and the plurality of anti-rotation holes 420 can form an anti-rotation assembly 400 of the scroll compressor 10. Among them, the plurality of struts 410 can be disposed on the second stationary scroll disk 220 or the drive disk 320, and the plurality of anti-rotation holes 420 can be disposed in the drive disk 320 or the second stationary scroll disk 220. Due to the presence of this anti-rotation assembly 400, the rotation of the main shaft 310 can be converted into the revolution of the moving scroll disk 230 instead of its own rotation.

[0032] Referring to Figure 5 , which shows Figures 1-4 a schematic perspective view of the drive assembly of the illustrated scroll compressor, and for clarity, the drive disk has been removed. As Figures 1-5As shown, the housing 100 is provided with a main hole 120 for the main shaft 310 to pass through. The drive disk 320 is provided with an auxiliary hole 321 radially inside the plurality of support columns 410 and the plurality of anti-rotation holes 420. The auxiliary hole 321 is spaced apart from the plurality of support columns 410 and the plurality of anti-rotation holes 420 in the radial direction. And the drive assembly 300 further includes an auxiliary shaft 330 and an adapter shaft 340 that connects the auxiliary shaft 330 to the main shaft 310. Specifically, the main shaft 310 is supported by a main bearing 350 in the main hole 120 of the housing 100, that is to say, the main shaft 310 cooperates with the main hole 120 in the housing 100 through the main bearing 350. The auxiliary shaft 330 is supported by an auxiliary bearing 360 in the auxiliary hole 321 of the drive disk 320, that is to say, the auxiliary shaft 330 cooperates with the auxiliary hole 321 in the drive disk 320 through the auxiliary bearing 360. The adapter shaft 340 is inserted into the main shaft 310 in a manner fixed and eccentric relative to the main shaft 310, and is inserted into the auxiliary shaft 330 in a manner rotatable and eccentric relative to the auxiliary shaft 330, so that the auxiliary shaft 330 is connected to the main shaft 310 in an eccentric manner relative to the main shaft 310. By eccentricity is meant that the rotation axis of the main shaft 310, the axis of the auxiliary shaft 330, and the axis of the adapter shaft 340 are parallel to each other but do not coincide, that is, they are spaced apart in the radial direction. In this configuration, the auxiliary shaft 330 will drive the drive disk 320 to revolve around the rotation axis of the main shaft 310 as the main shaft 310 rotates, and further drive the moving scroll 230 to revolve through the drive disk 320, so as to complete the compression of the medium described above. Of course, during this process, the anti-rotation assembly 400 can ensure the revolution of the moving scroll 230 by suppressing the self-rotation of the moving scroll 230. In addition, in this configuration, the second stationary scroll 220 can separate each compression cavity and the medium therein (especially the compressed high-pressure medium) from various components such as the main shaft 310, the auxiliary shaft 330, the adapter shaft 340, the main bearing 350, and the auxiliary bearing 360, thereby preventing the medium in each compression cavity from contaminating or even damaging these components and the lubricating oil film on their surfaces, and can prevent the pressure fluctuations in each compression cavity from acting on these components and the lubricating oil film on their surfaces. Thus, the noise, vibration, and wear generated by these components during operation can be reduced, thereby further improving the working performance of the scroll compressor and extending its service life.

[0033] In particular, referring to Figure 6 , which shows Figures 1-5 a schematic perspective view of the auxiliary shaft of the drive assembly of the scroll compressor shown. As Figures 1-6As shown, the transmission assembly 300 may further include an eccentric block 370 fixedly connected to the auxiliary shaft 330 and axially offset and radially protruding relative thereto, and the auxiliary shaft 330 and the eccentric block 370 are configured and assembled such that the axis of the eccentric block 370 is opposite to the axis of the auxiliary shaft 330 in the diametrical direction passing through the rotational axis of the main shaft 310, that is, the center of gravity of the eccentric block 370 and the axis of the auxiliary shaft 330 are located on both sides of the rotational axis of the main shaft 310. In this configuration, since the center of gravity of the eccentric block 370 and the axis of the auxiliary shaft 330 are located on both sides of the rotational axis of the main shaft 310, the center of gravity of the auxiliary shaft 330, the auxiliary bearing 360, the transmission disk 320, and the moving scroll disk 230 as a whole and the center of gravity of the eccentric block 370 are located on both sides of the rotational axis of the main shaft 310. This causes the eccentric block 370 to rotate on the other side of the rotational axis of the main shaft 310 when the transmission disk 320 and the moving scroll disk 230 revolve around the rotational axis of the main shaft 310. Therefore, the centrifugal force exerted by the transmission disk 320 and the moving scroll disk 230 on the main shaft 310 will be offset by the centrifugal force exerted by the eccentric block 370 on the main shaft 310, thereby reducing the vibration generated by the main shaft 310 during rotation and ensuring that the main shaft 310 rotates more smoothly.

[0034] In particular, the main bearing 350 may be fitted with the main shaft 310 and the main hole 120 in the housing 100 in an interference fit manner, while the auxiliary bearing 360 may be fitted with the auxiliary shaft 330 and the auxiliary hole 321 in the transmission disk 320 in a clearance fit manner. That is to say, the main bearing 350 may operate in the manner of a fixed bearing, while the auxiliary bearing 360 may operate in the manner of a floating bearing. In this configuration, on the one hand, the main shaft 310 can be more reliably supported by the main bearing 350, and on the other hand, the assembly difficulty of the auxiliary shaft 330 can be reduced by the auxiliary bearing 360. Although the auxiliary bearing 360 as a floating bearing may be impacted on each side surface when driving the transmission disk 320 to revolve, the lubricating oil film on each side surface of the auxiliary bearing 360 can evenly distribute the pressure generated by the impact, thereby reducing the pressure acting on each side surface, and thus protecting the auxiliary bearing 360 from damage. In addition, as described above, this lubricating oil film is also protected from high-pressure media and pressure fluctuations, so it can reliably protect the auxiliary bearing 360 from damage for a long time.

[0035] In particular, the scroll compressor 10 further includes a sealing ring 510 disposed circumferentially outside the radial direction of the plurality of anti-rotation holes 420 and clamped between the driving disk 320 and the housing 100. In this configuration, the sealing ring 510 can prevent the medium from entering the main hole 120 through the gap between the driving disk 320 and the housing 100, thereby avoiding the medium from contaminating or even damaging the lubricating oil film on the surfaces of components such as the main shaft 310 and the main bearing 350. More particularly, the housing 100 may be provided with an annular groove for receiving the sealing ring 510 to more accurately and reliably position the sealing ring 510. Additionally, in an embodiment not shown, the scroll compressor 10 further includes a sealing ring disposed circumferentially outside the radial direction of the plurality of anti-rotation holes 420 and clamped between the driving disk 320 and the second stationary scroll 220, and / or a sealing ring disposed circumferentially inside the radial direction of the plurality of anti-rotation holes 420 and clamped between the driving disk 320 and the second stationary scroll 220. Thereby, it is possible to more reliably prevent the medium from contacting the various components of the transmission assembly 300. The sealing ring may be made of graphite nylon and can be self-lubricating.

[0036] In particular, in Figures 1-3 the illustrated embodiment, each anti-rotation hole 420 may be covered or closed by the second stationary disk body 221 of the second stationary scroll 220 on the side close to the second stationary scroll 220, and covered or closed by the housing 100 on the side close to the housing 100. In Figure 4 the illustrated embodiment, each anti-rotation hole 420 may be covered or closed by the driving disk 320 on the side close to the driving disk 320. In this configuration, it is possible to effectively prevent the medium from entering the auxiliary hole 321 through the anti-rotation hole 420, thereby avoiding the medium from contaminating or even damaging the lubricating oil film on the surfaces of components such as the auxiliary shaft 330 and the auxiliary bearing 360.

[0037] In particular, returning to Figure 1, the internal chamber 110 has an input portion 110i located radially outside the orbiting scroll 230 and isolated from each other, and a discharge portion 110e located on the side of the first stationary scroll 210 opposite to the orbiting scroll 220. The housing 100 is provided with an input hole (not shown) communicating with the input portion 110i and a discharge hole 130 communicating with the discharge portion 110e, and the first through hole 213 in the first stationary scroll 210 leads to the discharge portion 110e. In this configuration, the medium from the upstream can enter the input portion 110i of the internal chamber 110 through the input hole in the housing 100, and then be absorbed and compressed by the vortex structures on both sides of the orbiting scroll 230, and then be discharged to the discharge portion 110e of the internal chamber 110 through the second through hole 234 and the first through hole 213, and finally be discharged through the discharge hole 130. In particular, the housing 100 is formed with an annular surface 140 surrounding the discharge portion 110e of the internal chamber 110, and the first stationary disk body 211 of the first stationary scroll 210 is engaged with the annular surface 140, so as to isolate the input portion 110i and the discharge portion 110e of the internal chamber 110 from each other. More particularly, the scroll compressor 10 further includes a sealing ring 520 clamped between the first stationary disk body 211 and the annular surface 140. In this configuration, the input portion 110i and the discharge portion 110e of the internal chamber 110 can be more reliably isolated from each other through the sealing ring 520 to prevent the high-pressure medium in the discharge portion 110e from leaking into the input portion 110i.

[0038] The optional but non-limiting embodiments of the scroll compressor according to the present invention have been described in detail above with reference to the drawings. For those ordinary technicians in the art, modifications and supplements to the technology and structure and the recombination of the features in each embodiment should obviously be regarded as included within the scope of the present invention without departing from the spirit and essence of the present disclosure. Therefore, these modifications and supplements that can be envisioned under the teachings of the present invention should be regarded as part of the present invention. The scope of the present invention includes equivalent technologies known at the filing date of the present invention and equivalent technologies not yet foreseen.

Claims

1. A scroll compressor, comprising a housing (100) and, accommodated in an internal chamber (110) of the housing (100): a compression assembly (200) including a stationary scroll plate fixed to the housing (100) and a movable scroll plate (230) cooperating with the stationary scroll plate and movably disposed, a compression cavity being provided between the stationary scroll plate and the movable scroll plate (230); a transmission assembly (300) including a main shaft (310) and a transmission disk (320), the transmission disk (320) being connected to the movable scroll plate (230), the main shaft (310) being configured to drive the movable scroll plate (230) to revolve through the transmission disk (320); and an anti-rotation assembly (400) configured to prevent the transmission disk (320) from rotating on its own axis.

2. The scroll compressor according to claim 1, wherein, The transmission assembly (300) further includes an auxiliary shaft (330) eccentrically connected to the main shaft (310) and rotatably received in the transmission disk (320) such that the main shaft (310) and the auxiliary shaft (330) are axially spaced apart from the stationary scroll plate.

3. The scroll compressor according to claim 2, wherein, An auxiliary hole (321) is provided in the transmission disk (320), the auxiliary shaft (330) being received in the auxiliary hole (321), and both the main shaft (310) and the auxiliary hole (321) are isolated from the compression cavity.

4. The scroll compressor according to claim 1, wherein the stationary scroll plate includes a first stationary scroll plate (210) and a second stationary scroll plate (220) fixed to the housing (100) and axially separated, and the movable scroll plate (230) is movably disposed between the first stationary scroll plate (210) and the second stationary scroll plate (220) and cooperates with each of them respectively.

5. The scroll compressor according to claim 4, wherein the anti-rotation assembly (400) includes a plurality of struts (410) and a plurality of anti-rotation holes (420), wherein, Each strut (410) passes through an anti-rotation hole (420), and the diameter of the anti-rotation hole (420) is larger than the diameter of the strut (410), and wherein the plurality of struts (410) project from one of the second stationary scroll plate (220) and the transmission disk (320), and the plurality of anti-rotation holes (420) are provided in the other of the second stationary scroll plate (220) and the transmission disk (320).

6. The scroll compressor according to claim 5, wherein, The plurality of struts (410) project from the second stationary scroll plate (220) and are fixed to the housing (100), and the plurality of anti-rotation holes (420) are provided in the transmission disk (320).

7. The scroll compressor according to claim 5, wherein, The plurality of struts (410) project from the transmission disk (320) and are fixed to the movable scroll plate (230), and the plurality of anti-rotation holes (420) are provided in the second stationary scroll plate (220).

8. The scroll compressor according to any one of claims 4-7, wherein, The first stationary scroll disk (210) is provided with a first stationary scroll body (212), the second stationary scroll disk (220) is provided with a second stationary scroll body (222), and the moving scroll disk (230) is provided with a first moving scroll body (232) cooperating with the first stationary scroll body (212) and a second moving scroll body (233) cooperating with the second stationary scroll body (222) on both sides respectively.

9. The scroll compressor according to any one of claims 4-7, wherein, The first stationary scroll disk (210) is provided with a first through hole (213) connecting the side opposite to the moving scroll disk (230) with the center of the first stationary scroll body (212), and the moving scroll disk (230) is provided with a second through hole (234) connecting the centers of the first moving scroll body (232) and the second moving scroll body (233).

10. The scroll compressor according to claim 8, wherein, The first stationary scroll body (212) and the second stationary scroll body (222) are symmetrically arranged about the moving scroll disk (230) and have the same height, and the first moving scroll body (232) and the second moving scroll body (233) are symmetrically arranged and have the same height.

11. The scroll compressor according to any one of claims 4-7, wherein, The moving scroll disk (230) is provided with a connecting wall (235) that crosses over the second stationary scroll disk (220) and is fixed to the transmission disk (320). The connecting wall (235) is located radially outside the second stationary scroll disk (220) and is spaced apart from the second stationary scroll disk (220).

12. The scroll compressor according to claim 11, wherein, The connecting wall (235) is continuously arranged in a circumferential direction to form a ring shape and is provided with a plurality of input holes (236).

13. The scroll compressor according to claim 12, wherein, The moving scroll disk (230) is further provided with a support wall (237) symmetrically arranged with the connecting wall (235). The support wall (237) abuts against the first stationary scroll disk (210) and is provided with a plurality of input holes (238). Each input hole (238) is symmetrically arranged with each input hole (236) in the connecting wall (235) and has the same size.

14. The scroll compressor according to claim 2 or 3, wherein, The transmission assembly (300) further includes: a main bearing (350) disposed in the housing (100) and supporting the main shaft (310); and an auxiliary bearing (360) disposed in the transmission disk (320) and supporting the auxiliary shaft (330).

15. The scroll compressor according to claim 14, wherein, The main bearing (350) has an interference fit with both the housing (100) and the main shaft (310), and the auxiliary bearing (360) has a clearance fit with both the transmission disk (320) and the auxiliary shaft (330).

16. The scroll compressor according to claim 2 or 3, wherein, The transmission assembly (300) further includes a transfer shaft (340). The transfer shaft (340) is eccentric with respect to the main shaft (310) and is fixedly inserted into the main shaft (310), and is eccentric with respect to the auxiliary shaft (330) and is rotatably inserted into the auxiliary shaft (330).

17. The scroll compressor according to claim 2 or 3, wherein, The transmission assembly (300) further includes an eccentric block (370). The eccentric block (370) is fixed to the auxiliary shaft (330) and is axially and radially offset with respect to the auxiliary shaft (330) such that the axis of the auxiliary shaft (330) and the center of gravity of the eccentric block (370) are on both sides of the axis of the main shaft (310).

18. The scroll compressor according to any one of claims 5-7, wherein, The scroll compressor further includes: a sealing ring that is circumferentially arranged on the radially outer side of the plurality of anti-rotation holes (420) and is clamped between the drive disk (320) and the housing (100); and / or, a sealing ring that is circumferentially arranged on the radially outer side of the plurality of anti-rotation holes (420) and is clamped between the drive disk (320) and the second stationary scroll (220); and / or, a sealing ring that is circumferentially arranged on the radially inner side of the plurality of anti-rotation holes (420) and is clamped between the drive disk (320) and the second stationary scroll (220).

19. The scroll compressor according to any one of claims 5 or 6, wherein, Both sides of the plurality of anti-rotation holes (420) are respectively covered by the second stationary scroll (220) and the housing (100).

20. The scroll compressor according to any one of claims 4-11, wherein, The internal chamber (110) has an input portion (110i) located radially outside the orbiting scroll (230) and a discharge portion (110e) located on the side of the first stationary scroll (210) opposite to the orbiting scroll (230).

21. The scroll compressor according to claim 20, wherein, The housing (100) forms an annular surface (140) therein that is arranged around the discharge portion (110e), and the first stationary scroll (210) is joined to the annular surface (140) to isolate the input portion (110i) from the discharge portion (110e) from each other.

22. The scroll compressor according to claim 21, wherein, The scroll compressor further includes a sealing ring that is clamped between the first stationary scroll (210) and the annular surface (140).

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