Compressor and air conditioner

Abstract

The application provides a compressor and an air conditioner, comprising an oil storage structure, a cross slide ring, a scroll structure and a support structure, wherein the scroll structure comprises a static scroll and a dynamic scroll; the dynamic scroll has a hollow cavity, the hollow cavity is communicated with the oil storage structure, and lubricating oil in the oil storage structure can enter the hollow cavity; a communication channel is arranged on the dynamic scroll; the cross slide ring is movably arranged on the support structure, and the dynamic scroll is arranged on the cross slide ring; the communication channel can guide the lubricating oil in the hollow cavity to enter between the dynamic scroll and the cross slide ring, so as to provide a back pressure force of the dynamic scroll to the dynamic scroll. According to the compressor, the lubricating effect can be ensured while the back pressure force is provided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a compressor and an air conditioner. BACKGROUND

[0002] At present, a scroll compressor is a volumetric compression compressor, and a compression component is composed of a moving scroll disc and a fixed scroll disc. During compression, relative revolution of the moving scroll disc and the fixed scroll disc forms continuous change of a closed volume, so as to achieve the purpose of compressing gas. Since the closed cavity formed by meshing of the moving scroll disc and the fixed scroll disc has a certain gas pressure, the moving scroll disc will bear an axial gas force opposite to the fixed disc during compression. In order to increase bearing life, reduce damage of the axial force to the bearing during high-speed operation, and reduce problems of scroll disc wear and compression chamber leakage caused by imbalance of the axial force, it is particularly necessary to adopt a structure design capable of balancing the axial gas force of the moving scroll disc. Therefore, most of the existing scroll compressor designs adopt a back pressure chamber structure. By arranging mounting racks, shaft seals and other components on the back of the moving scroll disc, a closed cavity is formed on the back of the moving scroll disc. The intermediate pressure refrigerant between suction pressure and discharge pressure is introduced into the closed cavity. Due to the existence of the gas pressure, an axial thrust towards the fixed disc is generated on the moving scroll disc, so as to balance the axial gas force generated by the compression cavity.

[0003] However, in the related art, the pressure gas introduced from the compression cavity of the moving and fixed scroll discs enters the back pressure cavity at the bottom of the moving scroll disc. The back pressure cavity is adjacent to the lubricating oil channel of the moving and fixed scroll discs. After the scroll compressor is high-speedized, the lubricating oil film of the moving and fixed scroll discs becomes thin. The gas in the back pressure cavity occupies the space of the lubricating oil, resulting in insufficient lubrication of the moving and fixed scroll discs, and eccentric wear of the moving and fixed scroll discs, which is particularly serious during super high-speed operation.

[0004] Therefore, how to provide a compressor and an air conditioner capable of providing back pressure while ensuring lubrication effect has become a problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to provide a compressor and an air conditioner capable of providing back pressure while ensuring lubrication effect.

[0006] In order to solve the above problems, the present application provides a compressor, comprising:

[0007] An oil storage structure;

[0008] A cross slip ring;

[0009] A scroll structure, the scroll structure comprising a fixed scroll disc and a moving scroll disc; the moving scroll disc has a hollow cavity, the hollow cavity is in communication with the oil storage structure, and lubricating oil in the oil storage structure can enter the hollow cavity; and a communication channel is arranged on the moving scroll disc;

[0010] The cross slide ring is movably arranged on the support structure, and the orbiting scroll is arranged on the cross slide ring; the communication channel can guide the lubricating oil in the hollow cavity to enter between the orbiting scroll and the cross slide ring, so as to provide a back pressure force to the orbiting scroll.

[0011] Further, the orbiting scroll comprises a base plate, and the hollow cavity comprises a hollow channel; the hollow channel is arranged in the base plate; and the extension direction of the hollow channel is parallel to the plate surface of the base plate.

[0012] Further, the number of the hollow channels is more than two, and the more than two hollow channels are arranged in a central symmetry around the central axis of the orbiting scroll.

[0013] Further, the orbiting scroll is provided with an oil inlet, and the oil inlet can guide the lubricating oil to enter the hollow cavity.

[0014] Further, the cross-sectional area of the hollow channel is S1, the sum of the cross-sectional areas of the oil inlets is S2, and S1 < S2.

[0015] Further, the cross slide ring is provided with an oil groove on the surface facing the orbiting scroll, and the communication channel communicates the hollow cavity and the oil groove, so that the lubricating oil in the hollow cavity enters the oil groove and then enters between the orbiting scroll and the cross slide ring, to provide a force to the orbiting scroll in the direction of the orbiting scroll.

[0016] Further, the support structure is provided with a mounting space, and the cross slide ring is movably arranged in the mounting space; the support structure is further provided with an oil supply cavity; the oil supply cavity is located on the side of the orbiting scroll away from the fixed scroll; the oil supply cavity is in communication with the mounting space; the orbiting scroll structure has a lubricating area; the oil supply cavity is communicated to the lubricating area; the lubricating oil in the hollow cavity can enter between the orbiting scroll and the cross slide ring through the communication channel, then enter the mounting space, and then enter the oil supply cavity, so that the oil supply cavity can guide the lubricating oil to enter the lubricating area.

[0017] Further, the compressor further comprises an adjusting bolt; the support structure is provided with a threaded hole, and the threaded hole is in communication with the oil supply cavity; the adjusting bolt is arranged in the threaded hole and is movable in the threaded hole, so as to adjust the amount of oil in the oil supply cavity.

[0018] Further, the support structure is further provided with a mounting hole; the compressor further comprises a crankshaft, and the crankshaft is rotatably arranged in the mounting hole; the orbiting scroll comprises a mounting sleeve, and the mounting sleeve is sleeved on the crankshaft; the mounting sleeve can rotate with the rotation of the crankshaft; the oil storage structure comprises an oil pool; the crankshaft is provided with a central oil hole, and the central oil hole is in communication with the hollow cavity and the oil pool.

[0019] According to still another aspect of the present application, an air conditioner is provided, and the compressor is the above-mentioned compressor.

[0020] The compressor and air conditioner provided in the application can ensure lubrication effect while providing back pressure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A sectional view of the compressor in the embodiment of the application;

[0022] Figure 2 A schematic view of the cooperation structure of the orbiting scroll and the cross slide ring in the embodiment of the application;

[0023] Figure 3 A schematic view of the cross slide ring in the embodiment of the application; Figure 2 An enlarged view of II in FIG. 1;

[0024] Figure 4 A schematic view of the cross slide ring in the embodiment of the application;

[0025] Figure 5 An enlarged view of I in FIG. 2; Figure 1 An enlarged view of I in FIG. 3;

[0026] Figure 6 An enlarged view of I in FIG. 4; Figure 1 An enlarged view of I in FIG. 5;

[0027] Figure 7 A schematic view of the orbiting scroll in the embodiment of the application;

[0028] Figure 8 A schematic view of the compressor in the embodiment of the application.

[0029] 1, stationary scroll; 2, orbiting scroll; 21, hollow cavity; 22, communication passage; 23, plug; 24, lubrication area; 3, cross slide ring; 31, oil groove; 321, first sealing surface; 322, second sealing surface; 4, support structure; 41, oil supply cavity; 42, mounting space; 5, adjusting bolt; 6, crankshaft; 71, gap between the cross slide ring and the orbiting scroll; 72, gap between the stationary scroll and the orbiting scroll. DETAILED DESCRIPTION

[0030] For reference Figures 1-8As shown, a compressor comprises an oil storage structure, a cross slide ring 3, a scroll structure and a support structure 4, the scroll structure comprising a static scroll 1 and a dynamic scroll 2; the dynamic scroll 2 has a hollow cavity 21, the hollow cavity 21 is communicated with the oil storage structure, and the lubricating oil in the oil storage structure can enter the hollow cavity 21; the dynamic scroll 2 is provided with a communication channel 22; the cross slide ring 3 is movably arranged on the support structure 4, and the dynamic scroll 2 is arranged on the cross slide ring 3; the communication channel 22 can guide the lubricating oil in the hollow cavity 21 to enter between the dynamic scroll 2 and the cross slide ring 3, so as to provide a back pressure force to the dynamic scroll 2 in the direction of the dynamic scroll 2. The application can make the lubricating oil enter between the dynamic scroll 2 and the cross slide ring 3, provide a back pressure force to the dynamic scroll 2 in the direction of the dynamic scroll 2, that is, provide an upward supporting force, replace the back pressure cavity in the related art to provide a back pressure force, and then the back pressure cavity in the application can be used to store lubricating oil, so as to prevent the pressure of the back pressure cavity from damaging the oil film, ensure the lubricating effect of the lubricating oil, solve the problem that the back pressure cavity is adjacent to the dynamic and static scroll 1 lubricating oil path, the pressure of the back pressure cavity damages the oil film, and the dynamic and static scroll 1 generates eccentric wear during the operation of the scroll compressor, and the problem is particularly serious during high-speed operation. The application supports the dynamic scroll 2 through the oil pressure between the cross slide ring 3 and the dynamic scroll 2, so that the dynamic scroll 2 and the static scroll 1 can be sealed; this can optimize the lubricity of the dynamic and static scroll 1, and strengthen the reliability of high-speed operation.

[0031] The application adopts the hollow cavity 21 on the dynamic scroll 2 of the scroll compressor, and the hollow cavity 21 and the cross slide ring 3 and the dynamic scroll 2 form a series oil channel structure, so that the oil pressure between the cross slide ring 3 and the dynamic scroll 2 acts on the bottom of the dynamic scroll 2, realizes the sealing of the dynamic and static scroll 1, can prevent the pressure of the back pressure cavity from damaging the oil film, and then makes the bottom of the dynamic scroll 2 and the sealing position of the static scroll 1 be full of oil, eliminates the oil film failure caused by the gas back pressure of the dynamic scroll 2 and the static scroll 1, and improves the reliability of high-speed operation.

[0032] During assembly, the gap 72 between the static scroll 1 and the dynamic scroll 2 and the gap 71 between the cross slide ring 3 and the dynamic scroll 2 can lift the dynamic scroll 2 when guiding the lubricating oil to enter the gap 71 between the cross slide ring 3 and the dynamic scroll 2, so as to eliminate the gap 72 between the static scroll 1 and the dynamic scroll 2, and then seal the static scroll 1 and the dynamic scroll 2.

[0033] The application also discloses some embodiments, the dynamic scroll 2 comprises a base plate, and the hollow cavity 21 comprises a hollow channel; the hollow channel is arranged in the base plate; and the extension direction of the hollow channel is parallel to the plate surface of the base plate, so that the length and width of the hollow channel are large, and the space of the hollow through hole is large. A through hole parallel to the plate surface of the base plate is arranged on the base plate, and plugs 23 are arranged at both ends of the through hole to form the hollow channel.

[0034] The application also discloses some embodiments, wherein the number of the hollow channels is more than two, and the more than two hollow channels are arranged in a central symmetry around the central axis of the moving scroll 2. In this way, the axial stress stability of the moving scroll 2 can be ensured, and the inclination of the moving scroll 2 can be prevented.

[0035] The moving scroll 2 is provided with an upward oil hole in the center of the bottom, a horizontal oil hole is circumferentially arranged to be connected with the upward oil hole, and a downward oil hole is arranged at the connection position of the horizontal oil hole and the sealing oil pool of the cross slide ring 3; the downward oil hole forms a connecting channel 22.

[0036] The application also discloses some embodiments, wherein the moving scroll 2 is provided with an oil inlet hole, and the oil inlet hole can guide the lubricating oil into the hollow cavity 21. The oil inlet hole is connected with all the hollow cavities 21, and the oil inlet hole can guide the oil into all the hollow cavities 21 at the same time.

[0037] The application also discloses some embodiments, wherein the cross-sectional area of the hollow channel is S1, the sum of the cross-sectional areas of the oil inlet holes is S2, and S1 < S2. In this way, the oil in each hollow channel can be ensured to be in a full state. The oil inlet hole is connected with the central oil hole of the crankshaft 6, that is, the position of the oil inlet hole corresponds to the position of the central oil hole of the crankshaft 6, so that the lubricating oil guided into the central oil hole of the crankshaft 6 can enter the hollow channel through the oil inlet hole.

[0038] The application also discloses some embodiments, wherein the cross slide ring 3 is provided with an oil groove 31 on the surface facing the moving scroll 2, and the connecting channel 22 connects the hollow cavity 21 and the oil groove 31, so that the lubricating oil in the hollow cavity 21 enters the oil groove 31 and then enters the space between the moving scroll 2 and the cross slide ring 3, to provide a force to the moving scroll 2 in the direction of the moving scroll 2. The number of the oil grooves 31 is consistent with the number of the hollow channels, and the number of the oil grooves 31 and the number of the oil pools are preferably both greater than or equal to 4. The four hollow channels are arranged in a central symmetry around the central axis of the moving scroll 2, and the four oil grooves 31 are arranged in a central symmetry around the central axis of the moving scroll 2. In this way, the operation stability of the moving scroll 2 can be ensured under the condition that there is enough lubricating oil.

[0039] The oil groove 31 is arranged on the end face of the cross slide ring 3, and the cross slide ring 3 and the inner surface of the mounting space 42 form an oil storage space.

[0040] The sealing surface, that is, the second sealing surface 322, of the cross slide ring 3 can be a plane, a circular arc surface or an inclined surface. As long as the sealing of the oil pool and the radial movement of the moving scroll 2 can be ensured, the sealing surface can be any of the above.

[0041] The enlarged view of the slide ring oil pressure support structure 4 in a static state. When the compressor is equipped, a certain gap is reserved between the tooth bottom surface of the moving scroll 2 and the tooth top surface of the static scroll 1. Figure 5Enlarged view of the oil pressure support structure 4, movement state. When the compressor crankshaft 6 rotates, the oil in the oil groove 31 supports the cross slide ring 3 and the moving scroll 2, realizes the upward movement of the moving scroll 2, and the bottom surface of the moving scroll 2 is in contact with the top surface of the static scroll 1.

[0042] When the compressor crankshaft 6 rotates, the oil in the oil groove 31 supports the cross slide ring 3 and the moving scroll 2, realizes the upward movement of the moving scroll 2, and the bottom surface of the moving scroll 2 is in contact with the top surface of the static scroll 1.

[0043] The application also discloses some embodiments, the support structure 4 is provided with a mounting space 42, and the cross slide ring 3 is movably mounted in the mounting space 42; the support structure 4 is also provided with an oil supply cavity 41; the oil supply cavity 41 is located on the side of the moving scroll 2 away from the static scroll 1; the oil supply cavity 41 is in communication with the mounting space 42; the scroll structure has a lubricating area; the oil supply cavity 41 is communicated to the lubricating area; the lubricating oil in the hollow cavity 21 can enter between the moving scroll 2 and the cross slide ring 3 through the communication channel 22, then enter the mounting space 42, and then enter the oil supply cavity 41; the oil supply cavity 41 can guide the lubricating oil to enter the lubricating area. The position and size of the oil supply cavity 41 of the application are equivalent to the back pressure cavity in the related art, that is, the structure of the back pressure cavity is not cancelled in the application, and only the injection of gas into the back pressure cavity is cancelled relative to the related art; lubricating oil is injected into the back pressure cavity to form the oil supply cavity 41 of the application, the oil supply cavity 41 is in communication with the high-pressure cavity (the high-pressure gas discharged in the scroll structure is in the compressor housing, so that the entire housing is a high-pressure cavity, and the oil supply cavity 41 is in communication with the housing, so the oil supply cavity 41 is also a high-pressure cavity), and the oil supply cavity 41 can be pressed by oil pressure.

[0044] The support structure 4 is an upper support, the moving scroll 2 is pressed on the cross slide ring 3, the cross slide ring 3 is pressed on the upper support, the two bosses at the bottom of the cross slide ring 3 are matched with the grooves of the upper support to realize the up-down movement of the cross slide ring 3, the two bosses at the top of the cross slide ring 3 are matched with the grooves of the moving scroll 2 to guide the rotation of the moving scroll 2 and realize the revolution without rotation of the moving scroll 2. The oil groove 31 of the cross slide ring 3 and the bottom of the moving scroll 2 form a first sealed oil pool, and the raised sealing surface of the cross slide ring 3 and the groove sealing surface of the moving scroll 2 form a second sealed oil pool.

[0045] The application also discloses some embodiments, the compressor further comprises an adjusting bolt 5; the support structure 4 is provided with a threaded hole, the threaded hole is in communication with the oil supply cavity 41; the adjusting bolt 5 is arranged in the threaded hole and can move in the threaded hole to adjust the oil amount in the oil supply cavity 41.

[0046] The present application also discloses some embodiments, in which a mounting hole is further provided on the support structure 4; the compressor also includes a crankshaft 6, which is rotatably mounted in the mounting hole, and the movable scroll 2 includes a mounting sleeve, which is sleeved on the crankshaft 6; the mounting sleeve can rotate with the rotation of the crankshaft 6; the oil storage structure includes an oil pool; the crankshaft 6 has a central oil hole, which connects the hollow cavity 21 and the oil pool.

[0047] The present invention provides an oil channel inside the movable scroll 2, one end of which is connected to the upper end of the crankshaft 6 and the other end is connected to the oil pool of the cross ring 3. The oil pool of the cross ring 3 is composed of an upper and lower pair of cross rings 3 and a left and right pair. The upper and lower pairs are provided on the cross ring 3, and the left and right pairs are composed of the guide surface of the cross ring 3 of the movable scroll 2 (the sealing oil pool of the cross ring 3 of the movable scroll 2) and the upper sealing surface of the cross ring 3, i.e., the first sealing surface 322 and the lower sealing surface, i.e., the first sealing surface 321. Figure 7 / 8 / 9. As the compressor crankshaft 6 rotates, an oil pump at its base presses lubricating oil into the upper end of the crankshaft 6. The oil hole at the upper end of the crankshaft 6 passes through the oil hole inside the orbiting scroll 2 and into the oil reservoir of the Oldham ring 3. The high-pressure oil reservoir propels the upper and lower contact surfaces between the orbiting scroll 2 and the Oldham ring 3. The Oldham ring 3 is restrained and immovable by the shaft system. The axial upward pressure generated by the oil pushes up the orbiting scroll 2, achieving a contact seal between the orbiting and stationary scrolls 1. The oil flows through the oil groove 31 of the Oldham ring 3 and then into the backpressure chamber between the orbiting scroll 2 and the upper bracket. Once the backpressure chamber is full, the lubricating oil enters the lubrication passages of the orbiting and stationary scrolls, continuously lubricating the contact surfaces. The pressure in the backpressure chamber can be adjusted using the oil volume adjustment screw 5. Excess lubricating oil can then flow back to the bottom of the crankshaft 6, completing the cycle. This structure eliminates the backpressure cavities in the orbiting and stationary scrolls 2 and 1, completely filling the backpressure chambers with lubricating oil. This eliminates oil film failure caused by backpressure between the orbiting and stationary scrolls, improving high-speed reliability.

[0048] 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.

[0049] The above are merely 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 within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A compressor characterized by, The compressor comprises: an oil storage structure; a cross slide ring (3); a scroll structure comprising a static scroll (1) and a dynamic scroll (2); the dynamic scroll (2) has a hollow cavity (21) which communicates with the oil storage structure, and lubricating oil in the oil storage structure can enter the hollow cavity (21); the dynamic scroll (2) is provided with a communication channel (22); and a support structure (4), the cross slide ring (3) is movably arranged on the support structure (4), and the dynamic scroll (2) is arranged on the cross slide ring (3); the communication channel (22) can guide the lubricating oil in the hollow cavity (21) to enter between the dynamic scroll (2) and the cross slide ring (3) to provide a back pressure force to the dynamic scroll (2) in the direction of the dynamic scroll (2); the surface of the cross slide ring (3) facing the dynamic scroll (2) is provided with an oil groove (31), and the communication channel (22) communicates the hollow cavity (21) and the oil groove (31) so that the lubricating oil in the hollow cavity (21) enters the oil groove (31) and then enters between the dynamic scroll (2) and the cross slide ring (3) to provide a back pressure force to the dynamic scroll (2) in the direction of the dynamic scroll (2).

2. The compressor of claim 1, wherein The dynamic scroll (2) comprises a base plate, and the hollow cavity (21) comprises a hollow channel; the hollow channel is arranged in the base plate; and the extension direction of the hollow channel is parallel to the plate surface of the base plate.

3. The compressor of claim 2, wherein The number of the hollow channels is more than two, and the two or more hollow channels are arranged in a central symmetry around the central axis of the dynamic scroll (2).

4. The compressor of claim 2 wherein, The dynamic scroll (2) is provided with an oil inlet which communicates with the hollow cavity (21) and can guide the lubricating oil to enter the hollow cavity (21).

5. The compressor of claim 4, wherein The cross-sectional area of the hollow channel is S1, and the sum of the cross-sectional areas of the oil inlets is S2; wherein S1 < S2.

6. The compressor of claim 1, wherein The support structure (4) is provided with a mounting space (42), and the cross slide ring (3) is movably arranged in the mounting space (42); the support structure (4) is further provided with an oil supply cavity (41); the oil supply cavity (41) is located on the side of the dynamic scroll (2) away from the static scroll (1); the oil supply cavity (41) communicates with the mounting space (42); the scroll structure has a lubricating area; the oil supply cavity (41) communicates with the lubricating area; the lubricating oil in the hollow cavity (21) can enter between the dynamic scroll (2) and the cross slide ring (3) through the communication channel (22), then enter the mounting space (42), and then enter the oil supply cavity (41), and the oil supply cavity (41) can guide the lubricating oil to enter the lubricating area.

7. The compressor of claim 6 wherein, The compressor further comprises an adjusting bolt (5); the support structure (4) is provided with a threaded hole which communicates with the oil supply cavity (41); the adjusting bolt (5) is arranged in the threaded hole and is movable in the threaded hole to adjust the oil amount in the oil supply cavity (41).

8. The compressor of claim 1, wherein The support structure (4) is further provided with a mounting hole; the compressor further comprises a crankshaft (6) rotatably mounted in the mounting hole; the orbiting scroll (2) comprises a mounting sleeve sleeved on the crankshaft (6); the mounting sleeve can rotate with the rotation of the crankshaft (6); the oil storage structure comprises an oil pool; the crankshaft (6) has a central oil hole communicating the hollow cavity (21) and the oil pool.

9. An air conditioner characterized by comprising: The compressor is the compressor according to any one of claims 1-8.

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