Scroll compressor and heat exchanger

Abstract

The invention provides a scroll compressor and a heat exchanger, the scroll compressor comprises a shell, a motor, a crankshaft, a static scroll plate, a dynamic scroll plate, a support rod and a balance block, the crankshaft comprises a main shaft and an eccentric shaft, and the eccentric shaft is arranged at the axial upper end of the main shaft and is eccentrically arranged with the main shaft; the supporting rod extends in the axial direction of the main shaft and is connected between the static scroll plate and a base of the machine shell, the supporting rod is sleeved with a shaft through hole of the crankshaft, the shaft through hole penetrates through the main shaft and the eccentric shaft along the axis of the main shaft, and the shaft through hole corresponding to the main shaft is rotatably supported on the supporting rod through a second bearing. And the balance block is sleeved on the main shaft and is close to the eccentric shaft. According to the scroll compressor, the axial height of the main shaft can be effectively reduced, the rotating stability of the crankshaft is good, meanwhile, the structure of the scroll compressor is simplified, the number of parts is small, and therefore the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to a scroll compressor and a heat exchanger having the scroll compressor. Background Art

[0002] In order to stably support the crankshaft, the existing scroll compressor is provided with an upper support seat and a lower support seat in its casing, so that the upper and lower ends of the crankshaft can be rotatably supported on the upper and lower support seats respectively. Since the upper and lower support seats are respectively provided on the upper and lower ends of the crankshaft in the axial direction, in order to accommodate the upper and lower support seats, the casing of the scroll compressor has to increase its accommodating height in the axial direction of the crankshaft, thereby increasing the height of the scroll compressor in the axial direction of the crankshaft.

[0003] In addition, in order to ensure the rotational balance of the crankshaft, a plurality of balancing blocks need to be sleeved on the crankshaft rotatably supported between the upper support seat and the lower support seat, and the size of the balancing blocks needs to be designed to be larger, thereby increasing the production cost. Summary of the invention

[0004] The first object of the present invention is to provide a scroll compressor which can effectively reduce the axial height, has good crankshaft rotation stability, a simplified structure, a small number of parts and a reduced production cost.

[0005] A second object of the present invention is to provide a heat exchanger for the above scroll compressor.

[0006] In order to achieve the first purpose of the present invention, the present invention provides a scroll compressor, including a casing, a motor, a crankshaft, a static scroll plate, a movable scroll plate, a support rod and a balancing block. The motor, crankshaft, static scroll plate and movable scroll plate are respectively arranged in the casing. The crankshaft includes a main shaft and an eccentric shaft. The eccentric shaft is arranged at the axial upper end of the main shaft and is eccentrically arranged with the main shaft. The rotor of the motor is sleeved on the main shaft and drives the main shaft to rotate around its own axis. The movable scroll plate is sleeved on the eccentric shaft through a first bearing. The static scroll plate is located above the movable scroll plate in the axial direction of the main shaft and forms a compression chamber with the movable scroll plate. The support rod extends in the axial direction of the main shaft and is connected between the static scroll plate and the base of the casing. The shaft through hole of the crankshaft is sleeved on the support rod. The shaft through hole is arranged to penetrate the main shaft and the eccentric shaft along the axis of the main shaft. The shaft through hole corresponding to the main shaft is rotatably supported on the support rod through a second bearing. The balancing block is sleeved on the main shaft and arranged close to the eccentric shaft.

[0007] It can be seen from the above scheme that during the operation of the scroll compressor of the present invention, the motor drives the main shaft of the crankshaft to rotate around its own axis through its rotor. Since the axial through holes corresponding to the crankshaft and the main shaft are rotatably supported on the support rod through the second bearing, the main shaft of the crankshaft rotates around the support rod, and the eccentric shaft of the crankshaft is synchronously driven to rotate eccentrically, so as to drive the movable scroll plate arranged on the eccentric shaft to perform translational motion around the axis of the main shaft with a fixed radius, thereby compressing the refrigerant in the compression chamber formed between the static scroll plate and the movable scroll plate.

[0008] The scroll compressor of the present invention utilizes a support rod to support the crankshaft, that is, the axial through hole of the crankshaft is sleeved on the support rod, and the axial through hole is arranged along the axis of the main shaft and penetrates the main shaft and the eccentric shaft, and the axial through hole corresponding to the main shaft is rotatably supported on the support rod through a second bearing, so that the coaxiality of the crankshaft and the rotating parts on the crankshaft is guaranteed and supported by a part of the support rod, thereby ensuring the coaxiality of each rotating part, and only a small-sized balancing block needs to be set to improve the stability of the crankshaft rotation. At the same time, the support rod of the scroll compressor of the present invention extends in the axial direction of the main shaft and is connected between the fixed scroll plate and the base of the casing, and the top end of the support rod is connected to the fixed scroll plate, so that it is easier to adjust the coaxiality between the fixed scroll plate and the main shaft of the crankshaft. Furthermore, the scroll compressor of the present invention can stably support the movement of the crankshaft through only one support rod. Compared with the existing scroll compressors that respectively provide an upper support seat and a lower support seat at the axial upper and lower ends of the crankshaft, the crankshaft of the scroll compressor of the present invention is sleeved on the support rod through its axial through hole, and no additional support seats are required at the axial upper and lower ends of the crankshaft, thereby effectively reducing the axial height of the scroll compressor as a whole in the axial direction of the crankshaft, and simplifying the structure, reducing the number of parts, making it easier to process, manufacture and assemble the various parts of the scroll compressor, thereby reducing production costs.

[0009] A preferred solution is that the top end of the support rod passes through the fixed scroll plate and is connected to the upper cover of the casing.

[0010] A further solution is that a first countersunk hole is provided on the inner end surface of the upper cover, and the top end of the support rod is inserted into the first countersunk hole.

[0011] A further solution is that a second countersunk hole is provided on the inner end surface of the base, and the bottom end of the support rod is inserted into the second countersunk hole.

[0012] A further solution is that the number of the second bearings is at least two, and the plurality of second bearings are arranged in the axial direction of the support rod and connected between the shaft through hole corresponding to the main shaft and the support rod.

[0013] A further solution is that the scroll compressor also includes a moving plate limit plate, which is located below the stationary scroll plate in the axial direction of the main shaft, and a first limit groove is provided on the upper end face of the moving plate limit plate, and a limit cavity is formed between the first limit groove and the lower end face of the stationary scroll plate, the annular disk portion of the moving scroll plate is located in the limit cavity, and the limit cavity limits the movement of the annular disk portion in the axial direction of the main shaft.

[0014] A further solution is that the scroll compressor also includes a limit slip ring, a second limit groove is provided on the bottom surface of the first limit groove, the limit slip ring can be movably located in the second limit groove in the radial direction of the support rod, the lower end surface of the ring disk part is provided with a first slide groove, the first slide groove extends in the radial direction of the support rod, and the upper end surface of the limit slip ring is protrudingly provided with an upper convex key, and the upper convex key can be movably located in the first slide groove in the radial direction of the support rod.

[0015] A further solution is that a second sliding groove is provided on the bottom surface of the second limiting groove, and the second sliding groove extends in the radial direction of the support rod. A lower cam is protrudingly provided on the lower end surface of the limiting slip ring, and the lower cam can be movably located in the radial direction of the support rod in the second sliding groove, and the lower cam and the upper cam are staggered in the circumferential direction of the support rod.

[0016] A further solution is that the scroll compressor also includes a sealing ring, which is arranged in the shaft hole of the movable scroll plate and rotatably sleeved on the support rod, and the sealing ring is located between the eccentric shaft and the fixed scroll plate to seal the gap between the shaft through hole and the support rod.

[0017] In order to achieve the second objective of the present invention, the present invention provides a heat exchanger, including a scroll compressor, and the scroll compressor is the scroll compressor mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of a first embodiment of a scroll compressor according to the present invention.

[0019] Figure 2 yes Figure 1 Enlarged view at A.

[0020] Figure 3 yes Figure 1 Enlarged view at B.

[0021] Figure 4 It is an exploded view of the first embodiment of the scroll compressor of the present invention.

[0022] Figure 5 1 is a structural diagram of a crankshaft in a first embodiment of a scroll compressor according to the present invention.

[0023] Figure 6 It is a cross-sectional view of a crankshaft in a first embodiment of a scroll compressor according to the present invention.

[0024] Figure 7It is a cross-sectional view of a second embodiment of a scroll compressor of the present invention.

[0025] Figure 8 yes Figure 7 Enlarged view at C.

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0027] The first embodiment of the scroll compressor:

[0028] See also Figures 1 to 6 The present embodiment discloses a scroll compressor 10, comprising a casing 11, a motor 12, a crankshaft 13, a fixed scroll 18, a movable scroll 17, a support rod 16 and a balance block 15. The motor 12, the crankshaft 13, the fixed scroll 18 and the movable scroll 17 are respectively arranged in the casing 11. The crankshaft 13 comprises a main shaft 131 and an eccentric shaft 132. The eccentric shaft 132 is arranged at the axial upper end of the main shaft 131 and is eccentric to the main shaft 131. At the same time, the rotor 121 of the motor 12 of the present embodiment is sleeved on the main shaft 131 and drives the main shaft 131 to rotate around its own axis. The movable scroll 17 is sleeved on the eccentric shaft 132 through the first bearing 114. The fixed scroll 18 is located above the movable scroll 17 in the axial direction of the main shaft 131 and forms a compression chamber (not shown) between the fixed scroll 18 and the movable scroll 17. In addition, the support rod 16 of this embodiment extends in the axial direction of the main shaft 131 and is connected between the fixed scroll plate 18 and the base 112 of the casing 11. The axial through hole 133 of the crankshaft 13 is sleeved on the support rod 16. The axial through hole 133 is arranged along the axis of the main shaft 131 to penetrate the main shaft 131 and the eccentric shaft 132. The axial through hole 133 corresponding to the main shaft 131 is rotatably supported on the support rod 16 through the second bearing 14. The balancing block 15 is sleeved on the main shaft 131 and arranged close to the eccentric shaft 132.

[0029] During operation of the scroll compressor 10 of this embodiment, the motor 12 drives the main shaft 131 of the crankshaft 13 to rotate around its own axis through its rotor 121. Since the axial through holes 133 corresponding to the crankshaft 13 and the main shaft 131 are rotatably supported on the support rod 16 through the second bearing 14, the main shaft 131 of the crankshaft 13 rotates around the support rod 16, and the eccentric shaft 132 of the crankshaft 13 is synchronously driven to eccentrically rotate, so as to drive the movable scroll plate 17 arranged on the eccentric shaft 132 to perform translational motion around the axis of the main shaft 131 with a fixed radius, thereby compressing the refrigerant in the compression chamber formed between the static scroll plate 18 and the movable scroll plate 17.

[0030] The scroll compressor 10 of this embodiment uses a support rod 16 to support the crankshaft 13, that is, the axial through hole 133 of the crankshaft 13 is sleeved on the support rod 16, and the axial through hole 133 is arranged along the axis of the main shaft 131 to penetrate the main shaft 131 and the eccentric shaft 132. The axial through hole 133 corresponding to the main shaft 131 is rotatably supported on the support rod 16 through the second bearing 14, so that the coaxiality of the crankshaft 13 and the rotating parts on the crankshaft 13 is guaranteed and supported by a single part of the support rod 16, thereby ensuring the coaxiality of each rotating part, and only a small-sized balancing block 15 is required to improve the stability of the rotation of the crankshaft 13. At the same time, the support rod 16 of the scroll compressor 10 of this embodiment extends in the axial direction of the main shaft 131 and is connected between the fixed scroll plate 18 and the base 112 of the casing 11. The top end of the support rod 16 is connected to the fixed scroll plate 18, which makes it easier to adjust the coaxiality between the fixed scroll plate 18 and the main shaft 131 of the crankshaft 13. In addition, the scroll compressor 10 of this embodiment can stably support the movement of the crankshaft 13 only through one support rod 16. Compared with the existing scroll compressor, the upper support seat and the lower support seat are respectively arranged at the upper and lower ends of the axial direction of the crankshaft. The crankshaft 13 of the scroll compressor 10 of this embodiment is sleeved on the support rod 16 through its shaft through hole 133, and no additional support seats are required at the upper and lower ends of the axial direction of the crankshaft 13, so that the axial height of the scroll compressor 10 as a whole in the axial direction of the main shaft 131 can be effectively reduced, and the structure is simplified, and the number of parts is reduced, so that the various parts of the scroll compressor 10 are easier to process, manufacture and assemble, thereby reducing the production cost.

[0031] In order to further improve the rotation stability of the crankshaft 13, the number of the second bearings 14 in this embodiment is at least two, and the plurality of second bearings 14 are arranged in the axial direction of the support rod 16 and connected between the shaft through hole 133 corresponding to the main shaft 131 and the support rod 16. Specifically, one second bearing 14 is disposed close to the base 112 of the housing 11, and one second bearing 14 is disposed corresponding to the balance block 15.

[0032] In order to improve the assembly tightness and supporting stability of the support rod 16, the top end of the support rod 16 of this embodiment is inserted into the axial hole of the fixed scroll plate 18, and the inner end surface of the base 112 of the casing 11 is provided with a second countersunk hole 1121, and the bottom end of the support rod 16 is inserted into the second countersunk hole 1121, thereby ensuring that the support rod 16 firmly supports the crankshaft 13 in the axial direction of the main shaft 131, thereby improving the rotation stability of the crankshaft 13.

[0033] In order to improve the working stability and reliability of the fixed scroll plate 18, the scroll compressor 10 of this embodiment also includes a movable disk limit plate 110, which is located below the fixed scroll plate 18 in the axial direction of the main shaft 131, and a first limit groove 1101 is provided on the upper end surface of the movable disk limit plate 110, and a limit cavity (not marked) is formed between the first limit groove 1101 and the lower end surface of the fixed scroll plate 18, and the annular disk portion 171 of the movable scroll plate 17 is located in the limit cavity, and the limit cavity limits the annular disk portion 171 of the movable scroll plate 17 from moving in the axial direction of the main shaft 131.

[0034] Specifically, the scroll compressor 10 of this embodiment also includes a limiting slip ring 113, and a second limiting groove 1102 is provided on the bottom surface of the first limiting groove 1101. The limiting slip ring 113 can be movably located in the second limiting groove 1102 in the radial direction of the support rod 16, and a first slide groove 171 is provided on the lower end surface of the annular disk portion 171 of the movable scroll plate 17. The first slide groove 171 extends in the radial direction of the support rod 16, and an upper convex key 1131 is protrudingly provided on the upper end surface of the limiting slip ring 113. The upper convex key 1131 can be movably located in the first slide groove 171 in the radial direction of the support rod 16. Under the anti-rotation restriction of the upper convex key 1131, the movable scroll plate 17 performs a translational motion around the axis of the main shaft 131 with a fixed radius.

[0035] Furthermore, in this embodiment, a second slide groove 1103 is provided on the bottom surface of the second limit groove 1102, and the second slide groove 1103 extends in the radial direction of the support rod 16. A lower cam 1132 is protrudingly provided on the lower end surface of the limit slip ring 113. The lower cam 1132 can be movably located in the second slide groove 1103 in the radial direction of the support rod 16, and the lower cam 1132 and the upper cam 1131 are staggered in the circumferential direction of the support rod 16, thereby improving the stability of the movable scroll 17 in performing a translational motion with a fixed radius around the axis of the main shaft 131.

[0036] In order to prevent the compressed high-pressure refrigerant from flowing into the gap between the shaft through hole 133 and the support rod 16 and affecting the rotation stability of the crankshaft 13, the scroll compressor 10 of this embodiment further includes a sealing ring 19, which is disposed in the shaft hole of the movable scroll 17 and rotatably sleeved on the support rod 16, and the sealing ring 19 is located between the eccentric shaft 132 and the fixed scroll 18 to seal the gap between the shaft through hole 133 and the support rod 16. Specifically, the sealing ring 19 of this embodiment is preferably made of elastic material.

[0037] The second embodiment of the scroll compressor:

[0038] As an explanation of the second embodiment of the scroll compressor of the present invention, only the differences from the first embodiment of the scroll compressor will be explained below.

[0039] See also Figure 7 and Figure 8The top end of the support rod 16' of the scroll compressor 10' of this embodiment passes through the fixed scroll plate 18 and is connected to the upper cover 111 of the casing 11. Specifically, the inner end surface of the upper cover 111 of the casing 11 of this embodiment is provided with a first countersunk hole 1111, and the top end of the support rod 16 is inserted into the first countersunk hole 1111, which further improves the assembly tightness and support stability of the support rod 16, and further ensures that the support rod 16 firmly supports the crankshaft 13 in the axial direction of the main shaft 131, thereby further improving the rotation stability of the crankshaft 13.

[0040] The scroll compressors 10 and 10 ′ of the first embodiment and the second embodiment may be applied to heat exchangers, such as air conditioners, refrigerators, heat pumps, freezers, cold storages, and the like.

[0041] The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles of the patent application scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A scroll compressor, comprising a casing, a motor, a crankshaft, a fixed scroll and a movable scroll, wherein the motor, the crankshaft, the fixed scroll and the movable scroll are respectively arranged in the casing, the crankshaft comprises a main shaft and an eccentric shaft, and the eccentric shaft is arranged at the axial upper end of the main shaft and eccentrically arranged with respect to the main shaft; The rotor of the motor is sleeved on the main shaft and drives the main shaft to rotate around its own axis. The movable scroll is sleeved on the eccentric shaft through a first bearing. The fixed scroll is located above the movable scroll in the axial direction of the main shaft and a compression chamber is formed between the fixed scroll and the movable scroll. It is characterized in that The scroll compressor also includes a support rod and a balancing block. The support rod extends in the axial direction of the main shaft and is connected between the fixed scroll plate and the base of the casing. The axial through hole of the crankshaft is sleeved on the support rod. The axial through hole is arranged along the axis of the main shaft and passes through the main shaft and the eccentric shaft. The axial through hole corresponding to the main shaft is rotatably supported on the support rod through a second bearing. The balancing block is sleeved on the main shaft and arranged close to the eccentric shaft.

2. The scroll compressor according to claim 1, characterized in that: The top end of the support rod passes through the fixed scroll plate and is connected to the upper cover of the casing.

3. The scroll compressor according to claim 2, characterized in that: The inner end surface of the upper cover is provided with a first countersunk hole, and the top end of the support rod is inserted into the first countersunk hole.

4. The scroll compressor according to claim 1, characterized in that: The inner end surface of the base is provided with a second countersunk hole, and the bottom end of the support rod is inserted into the second countersunk hole.

5. The scroll compressor according to claim 1, characterized in that: The number of the second bearings is at least two, and a plurality of the second bearings are arranged in the axial direction of the support rod and connected between the shaft through hole corresponding to the main shaft and the support rod.

6. The scroll compressor according to claim 1, characterized in that: The scroll compressor also includes a moving plate limit plate, which is located below the fixed scroll plate in the axial direction of the main shaft, and a first limit groove is formed on the upper end surface of the moving plate limit plate, and a limit cavity is formed between the first limit groove and the lower end surface of the fixed scroll plate, and the annular disk portion of the moving scroll plate is located in the limit cavity, and the limit cavity limits the movement of the annular disk portion in the axial direction of the main shaft.

7. The scroll compressor according to claim 6, characterized in that: The scroll compressor further comprises a limiting slip ring, a second limiting groove is formed on the bottom surface of the first limiting groove, and the limiting slip ring can be movably located in the second limiting groove in the radial direction of the support rod; The lower end surface of the annular disk portion is provided with a first slide groove, which extends in the radial direction of the support rod. The upper end surface of the limiting slip ring is protrudingly provided with an upper convex key, which can be movably located in the radial direction of the support rod in the first slide groove.

8. The scroll compressor according to claim 7, characterized in that: A second slide groove is provided on the bottom surface of the second limit groove, and the second slide groove extends in the radial direction of the support rod. A lower convex key is protruding from the lower end surface of the limit slip ring, and the lower convex key can be movably located in the radial direction of the support rod in the second slide groove, and the lower convex key and the upper convex key are staggered in the circumferential direction of the support rod.

9. The scroll compressor according to any one of claims 1 to 8, characterized in that: The scroll compressor also includes a sealing ring, which is arranged in the shaft hole of the movable scroll plate and rotatably sleeved on the support rod, and the sealing ring is located between the eccentric shaft and the fixed scroll plate to seal the gap between the shaft through hole and the support rod.

10. A heat exchanger including a scroll compressor, characterized in that: The scroll compressor is the scroll compressor according to any one of claims 1 to 9.

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