Compressor and air conditioner having the same

Abstract

The present application provides a compressor and an air conditioner having the same, including a housing and a motor structure, the motor structure being disposed within the housing; the motor structure includes a stator structure, a stop structure is disposed between the stator structure and the housing, and an oil return structure is disposed on the stop structure. The oil return structure can guide the refrigeration oil in the housing to flow back from one axial side of the stop structure to the other axial side, and the flow direction of the refrigeration oil is opposite to the flow direction of the refrigerant. According to the compressor and the air conditioner having the same of the present application, the return of the refrigeration oil can be effectively ensured.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioners, and particularly relates to a compressor and an air conditioner having the same. Background Art

[0002] At present, during the operation of a compressor, the main and auxiliary bearings of the pump body rotate at high speed. Therefore, refrigerating oil is required to lubricate the main and auxiliary bearings to ensure the normal operation of the compressor. Thus, an oil sump is designed at the lower part of the compressor pump body, and an oil circuit is designed for the pump body rotor assembly. The pump body rotor assembly includes an oil guiding vane, a crankshaft with an oil hole, and an oil baffle. The oil guiding vane rotates at high speed to suck the refrigerating oil from the oil sump into the pump body rotor assembly, and then overflows through the crankshaft oil hole to continuously lubricate the main and auxiliary bearings. Since there is high-speed refrigerant discharged from the pump body in the lower cavity of the compressor, the high-speed refrigerant passes through the stator cut edge and the rotor circulation hole and is discharged from the lower cavity of the compressor upward into the upper cavity of the compressor and finally discharged from the compressor. Therefore, the refrigerating oil overflowing from the crankshaft oil hole will be entrained by the high-speed refrigerant and discharged from the lower cavity of the compressor upward into the upper cavity of the compressor through the rotor circulation hole. An oil baffle is usually designed in the upper cavity of the compressor for the pump body rotor assembly to block the refrigerating oil entrained in the high-speed refrigerant from being discharged from the compressor. The oil baffle rotates at high speed following the compressor rotor, and the blocked refrigerating oil is thrown to the inner wall of the housing by the action of centrifugal force, and flows from the upper cavity of the compressor downward along the inner wall of the housing through the stator cut edge to the oil sump at the lower part of the pump body in the lower cavity of the compressor, realizing the steady-state circulation of the refrigerating oil inside the compressor.

[0003] However, during the internal oil circuit circulation of this compressor, the reflux direction of the refrigerating oil is opposite to the flow direction of the refrigerant at the stator cut edge. When the compressor runs at high speed, the flow rate of the refrigerant increases sharply, the reflux resistance of the refrigerating oil suddenly increases, and the reflux speed becomes slower or even does not reflux and accumulates in the upper cavity of the compressor. As the content of the refrigerating oil in the upper cavity of the compressor continuously increases, the following adverse situations will occur:

[0004] 1. The high-speed refrigerant will carry the refrigerating oil from the upper cavity of the compressor into the air-conditioning system. The refrigerating oil will adhere to the inner wall of the evaporator, affecting the heat exchange between the air-conditioning system and the outside world, resulting in a decrease in the system cooling capacity and low energy efficiency.

[0005] 2. The refrigerating oil cannot reflux, and the refrigerating oil in the oil sump in the lower cavity of the compressor continuously decreases. The compressor will run with insufficient oil, and the lubrication effect of the main and auxiliary bearings of the pump body and the mechanical friction pair will decline, resulting in wear and even jamming.

[0006] Therefore, how to provide a compressor and an air conditioner having the same that can effectively ensure the reflux of the refrigerating oil has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0007] Therefore, the technical problem to be solved by this application is to provide a compressor and an air conditioner having the same that can effectively ensure the reflux of the refrigerating oil.

[0008] To solve the above problems, the present application provides a compressor, including:

[0009] A housing;

[0010] And a motor structure disposed in the housing; the motor structure includes a stator structure, a stop structure is disposed between the stator structure and the housing, and an oil return structure is disposed on the stop structure. The oil return structure can guide the refrigeration oil in the housing to flow back from one axial side of the stop structure to the other axial side, and the flow direction of the refrigeration oil is opposite to the flow direction of the refrigerant.

[0011] Further, the stop structure includes an annular structure that extends circumferentially around the motor structure.

[0012] Further, the oil return structure includes an oil return hole, and the oil return hole is a through hole extending in the axial direction of the motor structure.

[0013] Further, a flow-through hole is provided on the stator structure, and the flow-through hole penetrates the stator structure in the axial direction of the motor structure, and the refrigerant can flow through the flow-through hole.

[0014] Further, the positions of the oil return hole and the flow-through hole in the circumferential direction of the motor structure are offset from each other;

[0015] And / or, the flow-through hole is provided on the outer circumferential side of the stator structure.

[0016] Further, the stop structure and the stator structure are connected by any one of interference fit, riveting or welding.

[0017] Further, the stop structure is welded to the housing.

[0018] Further, the stop structure includes a gasket disposed between the housing and the motor structure.

[0019] Further, the number of the stop structures is set to be at least one; when the number of the stop structures is set to be more than two, the two or more stop structures are arranged in sequence in the axial direction of the motor structure.

[0020] According to another aspect of the present application, an air conditioner is provided, including a compressor, and the compressor is the above-mentioned compressor.

[0021] For the compressor provided by the present application and the air conditioner having the same, during the operation of the compressor of the present application, the high-speed refrigerant in the lower cavity flows upward along the inner wall of the housing to the upper cavity. When the high-speed refrigerant encounters the stop structure, the flow direction changes and deviates from the inner wall of the housing, and after the high-speed refrigerant impacts the stop structure, the flow rate is greatly reduced, and the resistance to the return of the refrigeration oil is reduced, which is beneficial to the return of the refrigeration oil. The present application can effectively ensure the return of the refrigeration oil. Description of the Drawings

[0022] Figure 1 Structural schematic diagram of the compressor according to the embodiment of the present application;

[0023] Figure 2 Structural schematic diagram of the stop structure according to the embodiment of the present application;

[0024] Figure 3 Structural schematic diagram of the motor structure according to the embodiment of the present application;

[0025] Figure 4 Cross-sectional view of the compressor according to the embodiment of the present application;

[0026] Figure 5 Structural schematic diagram of the compressor according to the embodiment of the present application;

[0027] Figure 6 Structural schematic diagram of the compressor according to the embodiment of the present application;

[0028] Figure 7 Structural schematic diagram of the compressor according to the embodiment of the present application;

[0029] Figure 8 is Figure 7 Enlarged view of part A in

[0030] Figure 9 Structural schematic diagram of the compressor of the prior art.

[0031] The reference signs are represented as:

[0032] 1. Housing; 11. Upper cover assembly; 12. Lower cover; 2. Motor structure; 21. Stator structure; 211. Flow-through hole; 22. Stop structure; 221. Oil return structure; 23. Rotor assembly; 231. Rotor hole; 3. Diverter; 4. Laser weld; 5. Pump body assembly; 6. Oil sump; 61. Oil guiding plate; 7. Exhaust pipe; 8. Silencer; 91. Oil retaining structure; 92. Refrigerant flow path; 93. Refrigerant oil flow path. Detailed implementation manners

[0033] With reference to Figures 1-9As shown in the figure, a compressor includes a housing 1 and a motor structure 2, and the motor structure 2 is disposed inside the housing 1. The motor structure 2 includes a stator structure 21, and a stop structure 22 is disposed between the stator structure 21 and the housing 1. An oil return structure 221 is provided on the stop structure 22. The oil return structure 221 can guide the refrigerant oil inside the housing 1 to flow back from one axial side of the stop structure 22 to the other axial side, and the flow direction of the refrigerant oil is opposite to the flow direction of the refrigerant. During the operation of the compressor of the present application, the high-speed refrigerant in the lower cavity flows upward along the inner wall of the housing 1 to the upper cavity. When the high-speed refrigerant encounters the stop structure 22, the flow direction changes and deviates from the inner wall of the housing 1. After the high-speed refrigerant impacts the stop structure 22, the flow rate is greatly reduced, and the resistance to the return flow of the refrigerant oil is reduced, which is beneficial to the return flow of the refrigerant oil and can effectively ensure the return flow of the refrigerant oil. Refrigerant oil is lubricating oil.

[0034] The present application solves the problems that during the high-speed operation of the compressor, the refrigerant oil cannot return normally, resulting in oil shortage in the compressor, and then the main and auxiliary bearings and mechanical friction pairs are worn, and the compressor is stuck. It also solves the problem that the refrigerant oil follows the high-speed refrigerant into the air-conditioning system and adheres to the tube wall of the evaporator, affecting the heat exchange efficiency of the system and resulting in low refrigeration capacity of the system. It can also solve the problem that the stator of the conventional compressor is connected to the housing 1 by an interference fit, and the connection strength is low, and the noise and vibration of the compressor are poor.

[0035] The present application also has the following beneficial effects:

[0036] 1. Change the refrigerant flow path 92, improve the return ability of the internal refrigerant oil of the compressor during high-frequency operation, ensure the normal operation of the compressor, and no oil shortage occurs.

[0037] 2. Improve the return ability of the internal refrigerant oil of the compressor, reduce the content of the refrigerant oil discharged by the compressor into the air-conditioning system, improve the heat exchange efficiency of the two heat exchangers of the air-conditioning system, and thus improve the energy efficiency of the air conditioner.

[0038] 3. Design a gasket for the compressor stator, and perform 360° circumferential laser welding on the gasket and the housing 1 to improve the installation strength of the motor assembly and reduce the operating noise of the motor.

[0039] The present application also discloses some embodiments. The stop structure 22 includes an annular structure, and the annular structure extends circumferentially around the motor structure 2. The annular structure can be sleeved outside the stator structure 21 and is in interference fit with the stator structure 21.

[0040] The present application also discloses some embodiments. The oil return structure 221 includes an oil return hole, and the oil return hole is a through hole extending in the axial direction of the motor structure 2. Designing an oil return hole on the stop structure 22 can ensure that the refrigerant oil flows back normally from the upper cavity to the lower cavity along the inner wall of the housing 1.

[0041] The present application also discloses some embodiments. A flow-through hole 211 is provided on the stator structure 21. The flow-through hole 211 axially penetrates the stator structure 21 in the axial direction of the motor structure 2, and the refrigerant can flow through the flow-through hole 211.

[0042] The compressor mainly includes: a liquid distributor 3, an upper cover assembly 11, a housing 1, a rotor assembly 23, a stop structure 22, a stator structure 21, a laser weld 4, a pump body assembly 5, an oil guiding piece 61, a lower cover 12, an oil sump 6, and a silencer 8. A rotor hole 231 is provided on the rotor assembly 23, and the refrigerant can flow through the rotor hole 231. The pump body assembly 5 includes an oil guiding piece 61, a crankshaft with an oil hole, and an oil blocking structure 91. The oil blocking structure 91 is an oil blocking plate. A return oil hole is designed on the stop structure 22. The stop structure 22 and the stator structure 21 are connected by interference fit, riveting, or gluing to form a stator assembly. The stator assembly includes two upper and lower stop structures 22, and the end face of the stop structure 22 coincides with the end face of the stator structure 21. The stator assembly is connected to the housing 1 by a circumferential laser weld 4. The laser weld 4 is sectioned as shown in the figure. This sectional view can show the assembly position relationship of the housing 1, the stop structure 22, the return oil hole, the flow-through hole, and the stator structure 21 after the stop structure 22 assembly is laser welded. Install the remaining components of the compressor in sequence according to the conventional assembly process to complete the assembly of the low-noise and high-efficiency rotor compressor with a new motor installed.

[0043] The present application also discloses some embodiments. The position of the return oil hole and the flow-through hole 211 are staggered with each other in the circumferential direction of the motor structure 2. The stop structure 22 with a return oil hole can make the refrigerant flowing from the lower cavity to the upper cavity of the compressor deviate from the inner wall of the housing 1, and ensure that the refrigerating oil in the upper cavity of the compressor normally flows back along the inner wall of the housing 1. The two flow paths are staggered, that is, the refrigerating oil flow path 93 and the refrigerant flow path 92 are staggered, which improves the return speed of the refrigerating oil inside the compressor, ensures that there is no lack of oil in the compressor, and at the same time reduces the content of the refrigerating oil discharged into the air-conditioning system, avoids the refrigerating oil adhering to the inner walls of the two heat exchangers' pipelines, and improves the heat exchange efficiency of the two heat exchangers in the air conditioner.

[0044] The present application also discloses some embodiments. The flow-through hole 211 is provided on the outer peripheral side of the stator structure 21, and the return oil hole is provided on the stop structure 22. Then the return oil hole and the flow-through hole 211 are staggered both in the circumferential direction and in the radial direction, which can ensure the effective return of the refrigerating oil.

[0045] The present application also discloses some embodiments. The stop structure 22 and the stator structure 21 are connected by any one of interference fit, riveting, or welding. When the stop structure 22 is an annular structure, the annular structure is sleeved on the outer periphery of the stator structure 21 and is in interference fit with the stator structure 21, or the stop structure 22 is directly riveted or welded to the stator structure 21.

[0046] The present application also discloses some embodiments, in which the stop structure 22 is welded to the housing 1. The stop structure 22 and the housing 1 are connected by a laser circumferential weld to enhance the mounting stiffness of the motor and reduce the vibration radiation noise of the compressor.

[0047] The present application also discloses some embodiments, in which the stop structure 22 includes a gasket disposed between the housing 1 and the motor structure 2. That is, the oil return hole is provided on the gasket, and the gasket can seal the housing 1 and the motor structure 2. When the fluid flows through the gasket, it must flow through the oil return hole on the gasket. The gasket can be an annular gasket sleeved on the outer periphery of the stator structure 21 and in interference fit with the stator structure 21.

[0048] The present application also discloses some embodiments, in which the number of the stop structures 22 is set to at least one; when the number of the stop structures 22 is set to more than two, the more than two stop structures 22 are arranged in sequence in the axial direction of the motor structure 2. Then the refrigerant flows through the more than two stop structures 22 in sequence, and the flow rate is further reduced, which is more conducive to oil return.

[0049] See in conjunction with Figure 9 As shown, in the prior art, the compressor motor rotor drives the crankshaft and the oil guiding vane 61 to rotate, pumps out the refrigerating oil from the bottom of the compressor along the oil through hole of the crankshaft, and the pumped refrigerating oil enters the pump body through the crankshaft oil guiding port to lubricate the friction pair of the pump body. After lubrication, the refrigerating oil will follow the high-speed refrigerant discharged from the pump body, enter the upper cavity of the compressor through the rotor through hole. After the refrigerating oil entering the upper cavity of the compressor is blocked by the rotor baffle, it is thrown to the inner wall of the compressor housing 1 under the action of the rotor centrifugal force, and flows along the inner wall of the housing 1 through the stator cutting edge and returns to the bottom oil sump 6 of the lower cavity of the compressor. At the same time, the high-speed refrigerant discharged from the pump body will also pass through the stator cutting edge and be discharged from the lower cavity of the compressor into the upper cavity of the compressor. Therefore, at the stator cutting edge position, the oil return direction of the refrigerating oil is opposite to the flow direction of the refrigerant, and the flowing refrigerant will generate resistance to the oil return of the refrigerating oil. When the compressor operates at high frequency, the refrigerant flow rate increases sharply, and the oil return resistance of the refrigerating oil also increases sharply. At this time, the refrigerating oil will flow back slowly or cannot flow back. In such a case, the refrigerating oil accumulates in the upper cavity of the compressor, the oil volume in the lower cavity oil sump 6 of the compressor continuously decreases, and the compressor runs out of oil. The friction of the pump body parts increases, resulting in an increase in the power consumption of the compressor or even jamming; at the same time, as the accumulation amount of the refrigerating oil in the upper cavity of the compressor increases, the refrigerating oil is entrained by the high-speed refrigerant and discharged into the air-conditioning system. The refrigerating oil entering the air-conditioning system will adhere to the wall surfaces of the two heat exchangers' pipelines, affecting the heat exchange efficiency of the two heat exchangers' pipelines.

[0050] See in conjunction with Figures 7-8As shown, compared with the prior art, when the high-speed refrigerant discharged from the compressor pump body of the present application flows through the stop structure 22, the flow direction changes and deviates from the inner wall of the housing 1. Moreover, after the high-speed refrigerant impacts the stop structure 22, the flow velocity is greatly reduced, the resistance to the return flow of the refrigerating oil is decreased, which is beneficial to the return flow of the refrigerating oil. By designing an oil return hole on the stop structure 22, it can ensure that the refrigerating oil normally returns from the upper cavity of the compressor to the lower cavity along the inner wall of the housing 1. The return flow direction of the refrigerating oil is staggered from the flow direction of the refrigerant, which increases the return flow velocity of the refrigerating oil inside the compressor, ensures that there is no lack of oil in the compressor, and at the same time reduces the content of the refrigerating oil discharged into the air-conditioning system, avoids the refrigerating oil adhering to the inner walls of the pipelines of the two heat exchangers, and improves the heat exchange efficiency of the two heat exchangers in the air conditioner. Meanwhile, the stop structure 22 and the housing 1 are connected by a circumferential laser weld 4, which enhances the installation stiffness of the motor and reduces the vibration radiation noise of the compressor.

[0051] According to an embodiment of the present application, an air conditioner is provided, which includes a compressor, and the compressor is the above-mentioned compressor. The compressor is a rotary compressor.

[0052] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0053] The above are only the 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 principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in the technical field, several improvements and modifications can be made without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A compressor, characterized in that, Comprising: A housing (1); And a motor structure (2), the motor structure (2) being disposed within the housing (1); the motor structure (2) includes a stator structure (21), a stop structure (22) is disposed between the stator structure (21) and the housing (1), an oil return structure (221) is disposed on the stop structure (22), the oil return structure (221) can guide the refrigeration oil within the housing (1) to flow back from one axial side of the stop structure (22) to the other axial side, and the flow direction of the refrigeration oil is opposite to the flow direction of the refrigerant; wherein, when the refrigerant encounters the stop structure, the flow direction changes and deviates from the inner wall of the housing (1); The oil return structure (221) includes an oil return hole, a through-flow hole (211) is disposed on the stator structure (21), the through-flow hole (211) axially penetrates the stator structure (21) in the axial direction of the motor structure (2), and the refrigerant can flow through the through-flow hole (211); the oil return hole and the through-flow hole (211) are offset from each other in the circumferential direction of the motor structure (2).

2. The compressor according to claim 1, characterized in that, The stop structure (22) includes an annular structure that extends around the circumference of the motor structure (2).

3. The compressor according to claim 1, wherein The oil return hole is a through hole that extends in the axial direction of the motor structure (2).

4. The compressor according to claim 3, characterized in that, The through-flow hole (211) is disposed on the outer peripheral side of the stator structure (21).

5. The compressor according to claim 1, characterized in that The stop structure (22) is connected to the stator structure (21) by any one of interference fit, riveting or welding.

6. The compressor according to claim 1, characterized in that, The stop structure (22) is welded to the housing (1).

7. The compressor according to claim 1, wherein The stop structure (22) includes a gasket disposed between the housing (1) and the motor structure (2).

8. The compressor according to claim 1, characterized in that, The number of the stop structures (22) is set to at least one; when the number of the stop structures (22) is set to more than two, two or more of the stop structures (22) are arranged in sequence in the axial direction of the motor structure (2).

9. An air conditioner, comprising a compressor, characterized in that, The compressor is the compressor according to any one of claims 1-8.

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