Compressor and heat exchange system having the same

Abstract

The present application provides a compressor and a heat exchange system having the same, comprising a bottom oil pool, an oil return structure and a receiving structure, wherein the receiving structure is located at the bottom of the compressor and is used to receive the lubricating oil on the oil return structure; an oil return channel is provided on the receiving structure, and the oil return channel is used to guide the lubricating oil on the receiving structure to flow back to the bottom oil pool. The compressor and the heat exchange system having the same according to the present application can effectively prevent the high oil carrying rate of the compressor exhaust caused by high-pressure oil return.

Description

Technical Field

[0001] The present application belongs to the technical field of heat exchange systems, and in particular relates to a compressor and a heat exchange system having the same. Background Art

[0002] At present, scroll compressors are widely used in refrigeration, air conditioning, heat pumps and other fields due to their high efficiency, small size, light weight and stable operation. Generally speaking, a scroll compressor consists of a closed shell, a fixed scroll, a movable scroll, a bracket, a crankshaft, an anti-rotation mechanism oil supply device and a motor. The profiles of the movable and fixed scrolls are both spiral. The movable scroll is eccentric to the fixed scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the movable and fixed scrolls. When the movable scroll rotates with the center of the fixed scroll as the center and rotates at a certain rotation radius without self-rotation, the outer crescent-shaped space will continue to move toward the center. At this time, the refrigerant is gradually pushed to the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole. The high-pressure refrigerant is discharged from the pump body to complete the compression process.

[0003] However, during the operation of the compressor, the high-pressure oil that returns from the upper bracket oil pool along the oil return steel pipe to the lower cover oil pool hits the oil surface of the lower cover oil pool due to its excessive flow rate when leaving the oil return pipe, causing lubricating oil to splash. The splashed lubricating oil mixes with the refrigerant and will be discharged from the compressor along with the refrigerant, increasing the exhaust oil rate of the compressor.

[0004] Therefore, how to provide a compressor and a heat exchange system having the same that can effectively prevent high-pressure oil return from causing a high oil carryover rate in the compressor exhaust has become an urgent problem that technicians in this field need to solve. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present application is to provide a compressor and a heat exchange system having the same, which can effectively prevent high-pressure oil return from causing a high oil carryover rate in the compressor exhaust.

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

[0007] Bottom oil pool;

[0008] Oil return structure;

[0009] The receiving structure is located at the bottom of the compressor and is used to receive the lubricating oil on the oil return structure. An oil return channel is provided on the receiving structure and is used to guide the lubricating oil on the receiving structure to flow back to the bottom oil pool.

[0010] Furthermore, a friction surface is provided on the receiving structure; the compressor also includes an oil return circuit, which extends from the oil return structure to the friction surface; the oil return circuit is used to guide the lubricating oil on the oil return structure to flow back to the friction surface.

[0011] Furthermore, the compressor includes a crankshaft and a lower support assembly, the lower support assembly is sleeved outside the lower end of the crankshaft, and the lower support assembly forms a receiving structure; and / or, the contact surface of the lower support assembly and the crankshaft forms a friction surface.

[0012] Furthermore, an oil inlet is provided on the lower support assembly, and the oil inlet is connected to the oil return circuit and the friction surface.

[0013] Furthermore, the oil return channel includes an oil outlet, and the lower support assembly is provided with an oil outlet, and the oil outlet is connected to the friction surface and the bottom oil pool.

[0014] Furthermore, the compressor also includes an oil pump, which is arranged at the lower end of the crankshaft and is located below the lower support assembly. The oil pump is provided with an oil guide channel, which connects the oil outlet and the bottom oil pool.

[0015] Furthermore, the compressor also includes a thrust structure, which is supported at one end of the crankshaft and is arranged between the lower support assembly and the oil pump; an oil guide path is arranged on the thrust structure, and the oil guide path connects the oil outlet and the oil guide channel.

[0016] Further, the lower support assembly includes a lower bracket; when the lower support assembly is provided with an oil inlet, the oil inlet is a radial through hole provided on the lower bracket;

[0017] And / or, when the oil return passage includes an oil outlet, the oil outlet is a groove arranged on the lower end surface of the lower bracket, and the groove penetrates the lower bracket in the radial direction.

[0018] Further, the oil guide circuit is an oil guide groove arranged on the upper end surface of the thrust structure; the oil guide groove corresponds to the position of the oil outlet; and / or, the oil guide groove extends in the radial direction, and the radial outer end of the oil guide groove corresponds to the position of the oil guide channel.

[0019] Further, the compressor includes a compression structure; the oil return structure includes an upper support assembly, the upper support assembly is used to install the compression structure, and the upper support assembly forms the oil return structure; and / or, the compression structure includes a scroll assembly; and / or, the oil return circuit includes an oil return pipe, and the oil return pipe has a curved pipe section.

[0020] According to another aspect of the present application, a heat exchange system is provided, including a compressor, which is the above-mentioned compressor.

[0021] The compressor and the heat exchange system provided by the present application guide the high-pressure return oil on the oil return structure to the receiving structure at a lower position, so that the high-pressure oil can be decelerated when reaching the receiving structure and then discharged to the lower cover, effectively solving the problem of increased oil circulation rate caused by oil surface agitation. The present application can effectively prevent the high oil carryover rate of the compressor exhaust caused by high-pressure oil return. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a compressor according to an embodiment of the present application;

[0023] Figure 2 A partial schematic diagram of a compressor according to an embodiment of the present application;

[0024] Figure 3 This is a schematic structural diagram of the oil return part of the compressor of the embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of the lower bracket of an embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the structure of the oil pump according to an embodiment of the present application.

[0027] The reference numerals are as follows:

[0028] 1. Oil return channel; 11. Oil guide channel; 12. Oil guide oil circuit; 2. Oil return oil circuit; 31. Bottom oil pool; 32. Crankshaft; 33. Compression structure; 331. Stationary scroll; 332. Moving scroll; 34. Motor; 35. Balance block; 36. Cross ring; 4. Lower support assembly; 41. Oil inlet; 42. Oil outlet; 43. Lower bracket; 44. Lower support ring; 5. Upper support assembly; 6. Oil pump; 7. Thrust structure; 8. Housing; 81. Upper cover; 82. Lower cover; 91. Exhaust pipe; 92. Intake pipe. DETAILED DESCRIPTION

[0029] See also Figure 1-5 As shown, a compressor includes: a bottom oil pool 31, an oil return structure and a receiving structure. The receiving structure is located at the bottom of the compressor, and the receiving structure is used to receive the lubricating oil on the oil return structure; an oil return channel 1 is provided on the receiving structure, and the oil return channel 1 is used to guide the lubricating oil on the receiving structure to flow back to the bottom oil pool 31. The compressor also includes an oil pump 6, a motor 34, a housing 8 and a balance block 35, etc. The housing 8 includes a main housing 8 and an upper cover 81 and a lower cover 82. The receiving structure is located above the bottom oil pool 31 and below the oil pump 6 and the motor 34, that is, it is also located below the receiving structure. In this application, the high-pressure return oil on the oil return structure is led to the receiving structure at a lower position, so that the high-pressure oil can be decelerated when it reaches the receiving structure, and then discharged to the lower cover 82, which effectively solves the problem of increased oil circulation rate caused by oil surface agitation. The present application can effectively solve the problem of high compressor exhaust oil rate caused by the impact of high-pressure return oil on the oil surface of the bottom oil pool 31 on the lower cover 82.

[0030] The present application also discloses some embodiments, in which a friction surface is provided on the receiving structure; the compressor also includes an oil return oil circuit 2, which extends from the oil return structure to the friction surface; the oil return oil circuit 2 is used to guide the lubricating oil on the oil return structure to flow back to the friction surface. While reducing the impact of the high-pressure return oil on the liquid surface of the oil pool 31 at the bottom of the lower cover 82, it is also possible to increase the lubricating oil flowing into the friction surface of the receiving structure, thereby improving the lubrication effect and increasing the reliability of the compressor.

[0031] The present application also discloses some embodiments, in which the compressor includes a crankshaft 32 and a lower support assembly 4, wherein the lower support assembly 4 is sleeved outside the lower end of the crankshaft 32 to form a receiving structure; the lower support assembly 4 includes a lower support ring 44 and a lower bracket 43.

[0032] The present application also discloses some embodiments, in which the contact surface between the lower support assembly 4 and the crankshaft 32 forms a friction surface, that is, the inner circumference of the lower support assembly 4 forms a friction surface.

[0033] The present application also discloses some embodiments, wherein the lower support assembly 4 is provided with an oil inlet 41 , and the oil inlet 41 is connected to the oil return oil circuit 2 and the friction surface. The lower support assembly 4 includes a lower support frame 43 .

[0034] The present application also discloses some embodiments, in which the oil return channel 1 includes an oil outlet 42 , and the lower support assembly 4 is provided with the oil outlet 42 , and the oil outlet 42 is connected to the friction surface and the bottom oil pool 31 .

[0035] The present application also discloses some embodiments, the compressor further comprises an oil pump 6, the oil pump 6 is arranged at the lower end of the crankshaft 32, and the oil pump 6 is located below the lower support assembly 4, and an oil guide channel 11 is arranged on the oil pump 6, and the oil guide channel 11 connects the oil outlet 42 and the bottom oil pool 31. That is, the high-pressure return oil is led to the lubricating oil path of the lower bracket 43, so that the high-pressure oil can be decelerated in the process of lubricating the lower bracket 43, and finally discharged to the lower cover 82 through the oil guide channel 11 of the outer cut edge of the oil pump 6, which effectively solves the problem of increased oil circulation rate caused by oil surface agitation.

[0036] The present application also discloses some embodiments, the compressor also includes a thrust structure 7, the thrust structure 7 is supported at one end of the crankshaft 32, and the thrust structure 7 is arranged between the lower support assembly 4 and the oil pump 6; the thrust structure 7 is provided with an oil guide passage 12, and the oil guide passage 12 connects the oil outlet 42 and the oil guide passage 11. The downward extension of the oil guide passage 11, for the scroll compressor that returns oil through the upper bracket and the return oil pipe, the present application opens an oil inlet hole on the side wall of the lower bracket 43, so that the high-pressure return oil flowing out of the oil pool of the upper bracket flows into the friction surface of the lower bracket 43 along the oil inlet hole on the side wall of the lower bracket 43, so as to achieve the effect of increasing the refrigeration oil flowing into the friction surface of the lower bracket 43; and an axial downward oil discharge passage is designed on the outer periphery of the oil pump 6, so that the refrigeration oil flowing out of the lower bracket 43 is discharged downward along the oil guide passage 11 of the oil pump 6.

[0037] The present application also discloses some embodiments, wherein the lower support assembly 4 includes a lower bracket 43; when an oil inlet 41 is provided on the lower support assembly 4, the oil inlet 41 is a radial through hole provided on the lower bracket 43; the lower bracket 43 is sleeved on the outside of the lower end of the crankshaft 32. That is, the oil inlet 41 communicates with the inner circumference and the outer circumference of the lower bracket 43.

[0038] The present application also discloses some embodiments. When the oil return channel 1 includes an oil outlet 42 , the oil outlet 42 is a groove provided on the lower end surface of the lower bracket 43 , and the groove penetrates the lower bracket 43 in the radial direction.

[0039] The present application also discloses some embodiments, in which the oil guide passage 12 is an oil guide groove provided on the upper end surface of the thrust structure 7 ; the oil guide groove corresponds to the position of the oil outlet 42 .

[0040] The present application also discloses some embodiments, in which the oil guide groove extends in the radial direction, and the radial outer end of the oil guide groove corresponds to the position of the oil guide channel 11. A center hole is provided on the thrust structure 7, and the oil guide groove also penetrates the thrust structure 7 in the radial direction, that is, the oil guide groove extends from the outer peripheral side of the thrust structure 7 to the inner peripheral side, and the oil guide groove and the groove are arranged oppositely to form an oil outlet path in the oil outlet direction, so that the lubricating oil can leave the friction area of ​​the lower bracket 43 in the radial direction; an axially downward oil guide channel 11 is formed on the outer periphery of the oil pump 6, and the lubricating oil flowing out of the radial oil outlet path hits the oil pump 6 and is discharged downward along the oil guide channel 11, so that the upper bracket lubricating oil return process is completed without causing the oil pool of the lower cover 82 to be agitated.

[0041] The present application also discloses some embodiments, the compressor includes a compression structure 33; the oil return structure includes an upper support assembly 5, the upper support assembly 5 is used to install the compression structure 33, and the upper support assembly 5 forms the oil return structure. The upper support assembly 5 is an upper bracket.

[0042] The present application also discloses some embodiments, in which the compression structure 33 includes a scroll assembly, and the scroll assembly includes a stationary scroll 331 and a movable scroll 332 .

[0043] The present application also discloses some embodiments, the oil return circuit 2 includes an oil return pipe, and the oil return pipe has a curved pipe section. A flexible section is arranged at the end of the oil return pipe, i.e., close to the lower support assembly 4. The entire oil return pipe is in a "C" shape. The flexible section refers to a section connected to the lower support 43. In order to guide the oil into the lower support 43, the other parts of the oil return pipe are rigid or flexible. The curved pipe section can play a certain role in buffering and reducing the speed of the lubricating oil.

[0044] The compressor of the present application is a scroll compressor, which is mainly composed of a motor 34, an upper bracket, a lower bracket 43, a fixed scroll 331, a movable scroll 332, a cross slip ring 36, a crankshaft 32, etc. The motor 34 is fixed to the housing 8 by a shrink sleeve, and the upper bracket is fixed to the housing 8 by eight-point welding. The movable scroll 332 and the fixed scroll 331 are installed on the upper bracket with a phase angle difference of 180 degrees. The movable scroll 332 moves under the drive of the crankshaft 32 and meshes with the fixed scroll 331 to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes. The fixed scroll 331 is fixed to the upper bracket by screw fasteners. The lower bracket 43 is fixed to the lower support ring 44 by screws, and the lower support ring 44 is fixed to the housing 8 by spot welding.

[0045] When the compressor is running, the motor 34 drives the crankshaft 32 to rotate, and the crank of the crankshaft 32 drives the movable scroll 332 to move. Under the anti-rotation restriction of the cross slip ring 36, the movable scroll 332 performs translational motion around the center of the crankshaft 32 at a fixed radius. The refrigerant entering from the suction pipe 92 is sucked into the crescent-shaped suction cavity formed by the movable scroll 332 and the fixed scroll 331, and is discharged from the exhaust hole of the fixed scroll 331 after being compressed, and enters the cavity between the upper cover 81 and the fixed scroll 331, and then enters the cavity between the upper bracket and the motor 34 through the exhaust groove of the fixed scroll 331 and the upper bracket, and partially enters the lower end of the motor 34 through the flow groove between the motor 34 and the housing 8, and finally the high-pressure exhaust refrigerant is discharged from the compressor from the exhaust pipe 91.

[0046] The present application can guide the lubricating oil to the lubricating oil path of the lower bracket 43 during the process of the lubricating oil returning from the bracket to the oil pool of the lower cover 82, thereby preventing the lubricating oil from directly impacting the oil surface of the oil pool of the lower cover 82 and causing agitation of the lubricating oil.

[0047] According to an embodiment of the present application, a heat exchange system is provided, including a compressor, and the compressor is the above-mentioned compressor.

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

Claims

1. A compressor, characterized in that: include: Bottom oil pool (31); Oil return structure; A receiving structure, the receiving structure is located at the bottom of the compressor, and the receiving structure is used to receive the lubricating oil on the oil return structure; an oil return channel (1) is provided on the receiving structure, and the oil return channel (1) is used to guide the lubricating oil on the receiving structure to flow back to the bottom oil pool (31); the compressor comprises a crankshaft (32) and a lower support assembly (4), the lower support assembly (4) is sleeved outside the lower end of the crankshaft (32), and the lower support assembly (4) forms the receiving structure; The compressor further comprises an oil return circuit (2), and an oil inlet (41) is provided on the lower support assembly (4), and the oil inlet (41) connects the oil return channel (1) and the oil return circuit (2); The receiving structure is provided with a friction surface; the oil return passage (2) extends from the oil return structure to the friction surface; the oil return passage (2) is used to guide the lubricating oil on the oil return structure to flow back to the friction surface.

2. The compressor according to claim 1, characterized in that The contact surface between the lower support assembly (4) and the crankshaft (32) forms the friction surface.

3. The compressor according to claim 2, characterized in that The oil inlet (41) is connected to the oil return passage (2) and the friction surface.

4. The compressor according to claim 2, characterized in that The oil return channel (1) comprises an oil outlet (42), the lower support assembly (4) is provided with an oil outlet (42), and the oil outlet (42) is connected to the friction surface and the bottom oil pool (31).

5. The compressor according to claim 4, characterized in that The compressor further comprises an oil pump (6), the oil pump (6) being arranged at the lower end of the crankshaft (32), and the oil pump (6) being located below the lower support assembly (4), the oil pump (6) being provided with an oil guide channel (11), the oil guide channel (11) being connected between the oil outlet (42) and the bottom oil pool (31).

6. The compressor according to claim 5, characterized in that The compressor further comprises a thrust structure (7), the thrust structure (7) being supported on one end of the crankshaft (32), and the thrust structure (7) being arranged between the lower support assembly (4) and the oil pump (6); an oil guide passage (12) being arranged on the thrust structure (7), and the oil guide passage (12) being connected between the oil outlet (42) and the oil guide passage (11).

7. The compressor according to any one of claims 1 to 6, characterized in that: The lower support assembly (4) comprises a lower bracket (43); when an oil inlet (41) is provided on the lower support assembly (4), the oil inlet (41) is a radial through hole provided on the lower bracket (43); When the oil return passage (1) includes an oil outlet (42), the oil outlet (42) is a groove arranged on the lower end surface of the lower bracket (43), and the groove penetrates the lower bracket (43) in the radial direction.

8. The compressor according to claim 6, characterized in that The oil guide path (12) is an oil guide groove arranged on the upper end surface of the thrust structure (7); the oil guide groove corresponds to the position of the oil outlet (42); the oil guide groove extends in the radial direction, and the radial outer end of the oil guide groove corresponds to the position of the oil guide channel (11).

9. The compressor according to claim 1, characterized in that The compressor comprises a compression structure (33); the oil return structure comprises an upper support assembly (5), the upper support assembly (5) is used to install the compression structure (33), and the upper support assembly (5) forms the oil return structure; the compression structure (33) comprises a scroll assembly; the oil return oil circuit (2) comprises an oil return pipe, and the oil return pipe has a curved pipe section.

10. A heat exchange system, comprising a compressor, characterized in that: The compressor is the compressor according to any one of claims 1 to 9.

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