Scroll compressors, air conditioners and control methods

Abstract

This application relates to a scroll compressor, an air conditioner, and a control method. The scroll compressor includes a housing and a bearing assembly, a compressor oil sump, an oil pump, and a main bearing oil reservoir disposed within the housing. The housing has an air inlet for installing an air inlet pipe. The scroll compressor also includes a cooling tank located outside the housing. The cooling tank contains an oil passage and an airflow channel, which are isolated from each other. The oil passage is connected to the main bearing oil reservoir and the compressor oil sump, respectively. The air inlet pipe includes a first air outlet and a second air outlet. The first air outlet is connected to the air inlet, and the airflow channel is connected to the second air outlet and the suction chamber of the bearing assembly. According to the scroll compressor of this invention, self-cooling of the lubricating oil can be achieved with relatively low energy consumption, greatly ensuring the lubricating oil's load-bearing capacity and the motor's cooling capacity, thus guaranteeing the motor's load capacity.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and more particularly to a scroll compressor, an air conditioner, and a control method. Background Technology

[0002] Scroll compressors are widely used in home appliances, vehicles, aerospace, and other fields, accounting for a large proportion of the compressor manufacturing market. Compared with other positive displacement compressors, scroll compressors have the characteristics of low noise, high mechanical efficiency, and stable operation. With the upgrading of scroll compressors and the advancement of scroll disk processing technology, scroll compressors are bound to move towards higher speeds, breaking through the constraints of conventional speeds. Under high-speed operating conditions, the relative motion between various friction components inside the compressor intensifies. High-speed friction causes the temperature to rise, and the high temperature changes the viscosity of the lubricating fluid, reducing the lubrication effect and causing severe wear between the contact surfaces of the parts. This, in turn, affects the compressor's performance and power consumption. If the lubricating fluid temperature is not controlled and allowed to continue to rise, it may even lead to lubricating fluid carbonization, causing the compressor to shut down directly. In addition, the large displacement and small shell diameter requirements of the compressor also bring challenges to the design space of the internal oil return system. In order to solve the problems of poor lubrication effect of lubricating oil at high temperatures and insufficient space design of the internal oil return system in small shell diameter scroll compressors, there is an urgent need for a scroll compressor that can cool the lubricating oil. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a scroll compressor that can guide the lubricating oil from the main bearing oil reservoir into a cooling tank for cooling before returning it to the compressor oil reservoir. The cooling tank cools the lubricating oil by diverting a cooler refrigerant, which is about to enter the suction chamber, and then guides the heat-absorbing refrigerant back into the suction chamber. This allows the scroll compressor to achieve self-cooling of the lubricating oil with low energy consumption, greatly ensuring the lubricating oil's load-bearing capacity and the motor's cooling capacity, thus guaranteeing the motor's load capacity.

[0004] The present invention also proposes an air conditioner including the scroll compressor described above.

[0005] The present invention also proposes a control method for controlling the aforementioned air conditioner.

[0006] The scroll compressor according to the present invention includes a housing and a bearing assembly, a compressor oil sump, an oil pump, and a main bearing oil sump disposed within the housing. The housing is provided with an air inlet for installing an air inlet pipe. The scroll compressor also includes a cooling tank disposed outside the housing. The cooling tank is provided with an oil passage and an airflow channel, which are isolated from each other. The oil passage is connected to the main bearing oil sump and the compressor oil sump, respectively. The air inlet pipe includes a first air outlet and a second air outlet. The first air outlet is connected to the air inlet, and the airflow channel is connected to the second air outlet and the suction chamber of the bearing assembly.

[0007] According to the scroll compressor of the present invention, the lubricating oil in the main bearing oil reservoir can be introduced into the cooling tank for cooling and then sent back to the compressor oil reservoir. The cooling tank cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber. After the refrigerant absorbs heat, it is then guided back into the suction chamber. This allows the scroll compressor to achieve self-cooling of the lubricating oil with low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor, thus ensuring the load capacity of the motor.

[0008] According to the scroll compressor of the present invention, a spiral tube is provided inside the cooling tank, the spiral tube defining a spiral channel, and the spiral channel is configured as an oil passage.

[0009] Optionally, at least one first heat dissipation fin is provided on the outer wall of the spiral tube.

[0010] According to the scroll compressor of the present invention, at least one second heat dissipation fin is provided on the outer wall of the cooling tank.

[0011] According to the scroll compressor of the present invention, the airflow channel is connected to the second air outlet through a first pipeline, and the airflow channel is connected to the suction chamber of the bearing assembly through a second pipeline. A first switching valve is provided on the first pipeline, and / or a second switching valve is provided on the second pipeline. The opening degree of the first switching valve and the second switching valve is adjustable.

[0012] Optionally, the bearing assembly includes a stationary scroll, a moving scroll, and a crankshaft. The upper end of the crankshaft is connected to the moving scroll, and the stationary scroll is disposed above the moving scroll. The bottom of the crankshaft is connected to the inner wall of the housing through a lower bearing. The stationary scroll is provided with an air intake chamber and an air intake channel communicating with the air intake chamber. A second pipeline is connected to the stationary scroll so that the air intake channel is connected to the second pipeline.

[0013] Optionally, the intake channel includes a first channel and a second channel that are interconnected. The first channel is located between the intake chamber and the second channel. The diameter of the first channel is smaller than the diameter of the second channel, and a portion of the second pipe is located in the second channel.

[0014] Optionally, the second conduit includes a pipe head that passes through the second channel, and a seal is embedded between the pipe head and the wall defining the second channel.

[0015] According to the scroll compressor of the present invention, a thermometer is provided in the compressor oil sump.

[0016] The air conditioner according to the present invention includes the scroll compressor described above.

[0017] According to the air conditioner of the present invention, the lubricating oil in the main bearing oil reservoir can be introduced into the cooling tank for cooling and then sent back to the compressor oil reservoir. The cooling tank cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber, and then guides the heat-absorbing refrigerant back into the suction chamber. This allows the scroll compressor to achieve self-cooling of the lubricating oil with only low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor, ensuring the load capacity of the motor, making the air conditioner operate more smoothly and with lower energy consumption.

[0018] According to the control method of the present invention, for controlling the above-mentioned air conditioner, the method includes: detecting the actual temperature of the lubricating oil in the compressor oil sump; and controlling the first switching valve and the second switching valve to maintain the same opening degree according to the actual temperature.

[0019] Optionally, the first and second switching valves are controlled to maintain the same opening degree according to the actual temperature, specifically including: comparing the actual temperature with a first preset temperature and a second preset temperature, wherein the first preset temperature is greater than the second preset temperature; when the actual temperature is greater than or equal to the first preset temperature, controlling the first and second switching valves to be fully open; when the actual temperature is greater than or equal to the second preset temperature and less than the first preset temperature, controlling the first and second switching valves to be open; and when the actual temperature is less than the second preset temperature, controlling the first and second switching valves to be fully closed.

[0020] According to the control method of the present invention, when the lubricating oil temperature is detected to be insufficient, the lubricating oil in the main bearing oil reservoir is introduced into a cooling tank for cooling and then returned to the compressor oil reservoir. The cooling tank cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber, and then the refrigerant that has absorbed heat is guided back into the suction chamber. This allows the scroll compressor to achieve self-cooling of the lubricating oil with low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor, thus ensuring the load capacity of the motor. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of a scroll compressor according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a cross-sectional view of a scroll compressor according to an embodiment of the present invention from another angle;

[0026] Figure 4 A perspective view of a scroll compressor according to an embodiment of the present invention;

[0027] Figure 5 This is a partial cross-sectional view of a scroll compressor according to an embodiment of the present invention;

[0028] Figure 6 A perspective view of the stationary scroll plate of a scroll compressor according to an embodiment of the present invention;

[0029] Figure 7 This is a perspective view of the stationary scroll of a scroll compressor according to an embodiment of the present invention from another angle.

[0030] Figure 8 This is a flowchart illustrating the control method according to an embodiment of the present invention.

[0031] Figure label:

[0032] Scroll compressor 1, housing 10, intake pipe 12, first bracket 13, second bracket 14, support ring 15, motor 16, bearing assembly 20, stationary scroll 21, moving scroll 22, crankshaft 23, intake chamber 24, intake channel 25, first channel 251, second channel 252, compressor oil sump 30, main bearing oil sump 50, cooling tank 60, spiral tube 61, oil passage 612, airflow channel 62, second heat dissipation fins 63, third pipeline 64, fourth pipeline 65, first pipeline 70, first switching valve 71, second pipeline 80, second switching valve 81, seal 83, thermometer 90. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figures 1-3 As shown, the scroll compressor 1 according to an embodiment of the present invention includes a housing 10 and a bearing assembly 20, a compressor oil sump 30, an oil pump, and a main bearing oil sump 50 disposed within the housing 10. The housing 10 is provided with an air inlet for mounting an air inlet pipe 12. The scroll compressor 1 also includes a cooling tank 60 disposed outside the housing 10. The cooling tank 60 is provided with an oil passage 612 and an airflow channel 62, which are isolated from each other. The oil passage 612 is connected to the main bearing oil sump 50 and the compressor oil sump 30, respectively. The air inlet pipe 12 includes a first air outlet and a second air outlet. The first air outlet is connected to the air inlet. The airflow channel 62 is connected to the second air outlet and the suction chamber 24 of the bearing assembly 20.

[0035] In detail, the intake pipe 12 is used to provide refrigerant input to the scroll compressor 1. Part of the refrigerant enters the intake port through the first outlet and then enters the interior of the housing 10. The other part of the refrigerant enters the airflow channel 62 in the cooling tank 60 through the second outlet to cool the lubricating oil in the oil passage 612. After exchanging heat with the lubricating oil in the oil passage 612, the refrigerant flows out of the cooling tank 60 and enters the suction chamber 24 of the bearing assembly 20. When the scroll compressor 1 is running, the lubricating oil in the compressor oil sump 30 is sent to the bearing assembly 20 by the oil pump. Then, at least part of the lubricating oil enters the oil passage 612 in the cooling tank 60 through the main bearing oil sump 50. After exchanging heat with the refrigerant in the airflow channel 62 in the oil passage 612 and cooling down, the lubricating oil flows back to the compressor oil sump 30. This effectively improves the lubricating oil's carrying capacity with low power consumption, especially under heavy operating conditions, and can effectively cool the motor 16.

[0036] According to an embodiment of the present invention, the scroll compressor 1 can guide the lubricating oil in the main bearing oil reservoir 50 into the cooling tank 60 for cooling and then send it back to the compressor oil reservoir 30. The cooling tank 60 cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber 24, and then guides the heat-absorbing refrigerant back into the suction chamber 24. This allows the scroll compressor 1 to achieve self-cooling of the lubricating oil with low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor 16, thus ensuring the load capacity of the motor 16.

[0037] like Figure 2 As shown, in the scroll compressor 1 according to an embodiment of the present invention, a spiral tube 61 is provided in the cooling tank 60, the spiral tube 61 defines a spiral channel, and the spiral channel is configured as an oil passage 612. In this way, compared with a straight oil passage 612, the spiral channel is longer, which can achieve more sufficient heat exchange with the refrigerant in the airflow passage 62. This allows the scroll compressor 1 to achieve self-cooling of the lubricating oil with only lower energy consumption, which greatly ensures the carrying capacity of the lubricating oil and the cooling capacity of the motor 16, thus ensuring the load capacity of the motor 16.

[0038] The spiral tube 61 defines an airflow channel 62 between the shell 10 of the cooling tank 60 and the spiral tube 61. This simplifies the structural design and enhances the heat exchange capacity between the refrigerant, lubricating oil, and the air outside the cooling tank 60.

[0039] In some embodiments, at least one first heat dissipation fin is provided on the outer wall of the spiral tube 61, which can further enhance the heat exchange capacity between the spiral tube 61 and the airflow and enhance the cooling capacity of the lubricating oil.

[0040] It should be noted that the shape and size of the first heat dissipation fin are not limited in this application. For example, the shape of the first heat dissipation fin can be a strip, a square, or an arc.

[0041] In some embodiments, a plurality of first heat dissipation fins are provided on the outer wall of the spiral tube 61, and the plurality of first heat dissipation fins are evenly distributed along the spiral tube 61.

[0042] like Figures 2-4 As shown, in the scroll compressor 1 according to an embodiment of the present invention, at least one second heat dissipation fin 63 is provided on the outer wall of the cooling tank 60, which can enhance the heat exchange capacity between the cooling tank 60 and the external airflow, thereby having a certain cooling effect on the refrigerant in the airflow channel 62 and the lubricating oil in the oil channel 612, thereby reducing the energy consumption required for cooling the lubricating oil and making the scroll compressor 1 more energy-efficient.

[0043] like Figures 1-4 As shown, in the scroll compressor 1 according to an embodiment of the present invention, the airflow channel 62 is connected to the second air outlet through the first pipe 70, and the airflow channel 62 is connected to the suction chamber 24 of the bearing assembly 20 through the second pipe 80. The first pipe 70 is provided with a first switching valve 71, and / or the second pipe 80 is provided with a second switching valve 81. The opening degree of the first switching valve 71 and the second switching valve 81 is adjustable.

[0044] That is, in some embodiments, the first pipeline 70 is provided with a first switching valve 71 and the second pipeline 80 is provided with a second switching valve 81. In some embodiments, the first pipeline 70 is provided with a first switching valve 71; in other embodiments, the second pipeline 80 is provided with a second switching valve 81.

[0045] The first switching valve 71 is used to control the flow rate of refrigerant entering the airflow channel 62, and the second switching valve 81 is used to control the flow rate of refrigerant exiting the airflow channel 62. By using the first switching valve 71 and the second switching valve 81, the residence time of the refrigerant in the cooling tank 60 can be controlled, thereby controlling the cooling effect of the refrigerant on the lubricating oil. This provides more accurate control, improves the cooling effect of the refrigerant on the lubricating oil, and saves energy.

[0046] like Figures 1-4 As shown, in some embodiments, the oil passage 612 is connected to the main bearing oil reservoir 50 via a third pipeline 64, and the oil passage 612 is connected to the compressor oil reservoir 30 via a fourth pipeline 65.

[0047] like Figures 1-3 as well as Figure 5 As shown, in some embodiments, the bearing assembly 20 includes a stationary scroll 21, a moving scroll 22, and a crankshaft 23. The upper end of the crankshaft 23 is connected to the moving scroll 22, and the stationary scroll 21 is disposed above the moving scroll 22. The bottom of the crankshaft 23 is connected to the inner wall of the housing 10 through a lower bearing. The stationary scroll 21 is provided with an air intake chamber 24 and an air intake channel 25 communicating with the air intake chamber 24. A second pipe 80 is connected to the stationary scroll 21 so that the air intake channel 25 is connected to the second pipe 80, thereby enabling the refrigerant flowing out of the airflow channel 62 to be returned to the air intake chamber 24. In some embodiments, the stationary scroll 21 is fixed to the first bracket 13 by screw fasteners. The second bracket 14 is fixed to the support ring 15 by screws, and the support ring 15 is then fixed to the housing 10 by spot welding. As the crankshaft 23 rotates, the gas is gradually compressed in a series of crescent-shaped sealed cavities that are isolated from each other and whose volume changes continuously, which are composed of the moving scroll 22 and the stationary scroll 21, and then discharged from the exhaust port of the stationary scroll 21.

[0048] like Figures 5-7 As shown, in some embodiments, the intake channel 25 includes a first channel 251 and a second channel 252 that are interconnected. The first channel 251 is located between the intake chamber 24 and the second channel 252. The diameter of the first channel 251 is smaller than the diameter of the second channel 252, and a portion of the second pipe 80 is located in the second channel 252. Because the diameter of the first channel 251 is smaller than the diameter of the second channel 252, a step is formed between the inner wall of the first channel 251 and the inner wall of the second channel 252, which can position and limit the second pipe 80, simplifying the assembly of the second pipe 80 with the stationary vortex disk 21.

[0049] In some embodiments, the second pipeline 80 is connected to the stationary scroll 21 by welding, which increases the connection strength and makes the operation of the scroll compressor 1 more reliable.

[0050] In some embodiments, the second conduit 80 includes a pipe head that passes through the second channel 252, and a seal 83 is embedded between the pipe head and the wall defining the second channel 252 to prevent refrigerant leakage and loss.

[0051] like Figure 1 and Figure 3 As shown, in the scroll compressor 1 according to an embodiment of the present invention, a thermometer 90 is provided in the compressor oil sump 30. The temperature of the lubricating oil in the compressor oil sump 30 can be measured by the thermometer 90. In this way, when the temperature of the lubricating oil does not meet the requirements, the temperature of the lubricating oil can be more accurately controlled by cooperating with the first switching valve 71 and the second switching valve 81, so as to avoid energy waste while the lubricating oil can be cooled by itself.

[0052] In other words, when the oil temperature exceeds the set value, the first switching valve 71 and the second switching valve 81 open, introducing a portion of low-temperature intake refrigerant from the intake pipe 12 of the scroll compressor 1 to cool the lubricating oil, thereby reducing the lubricating oil temperature, increasing the viscosity of the lubricating oil, reducing wear, and improving the reliability of the scroll compressor 1. When the oil temperature meets the requirements, the first switching valve 71 and the second switching valve 81 can be closed, thereby avoiding energy waste.

[0053] The air conditioner according to the present invention includes the scroll compressor 1 described above.

[0054] According to the air conditioner of the present invention, the lubricating oil in the main bearing oil reservoir 50 can be introduced into the cooling tank 60 for cooling and then sent back to the compressor oil reservoir 30. The cooling tank 60 cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber 24, and then guides the heat-absorbing refrigerant back into the suction chamber 24. This allows the scroll compressor 1 to achieve self-cooling of the lubricating oil with only low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor 16, ensuring the load capacity of the motor 16, making the air conditioner run more smoothly and with lower energy consumption.

[0055] like Figure 8 As shown, according to the control method of the present invention, for controlling the above-mentioned air conditioner, the method includes:

[0056] S1: Detect the actual temperature of the lubricating oil in the compressor oil sump 30;

[0057] S2: Control the first switching valve 71 and the second switching valve 81 to maintain the same opening degree according to the actual temperature.

[0058] According to the control method of the present invention, the temperature of the lubricating oil in the compressor oil sump 30 can be measured by the thermometer 90. When the temperature of the lubricating oil does not meet the requirements, the temperature of the lubricating oil can be more accurately controlled by cooperating with the first switching valve 71 and the second switching valve 81, thereby avoiding energy waste while allowing the lubricating oil to cool itself.

[0059] In some embodiments, controlling the first switching valve 71 and the second switching valve 81 to maintain the same opening degree according to the actual temperature specifically includes:

[0060] S3: Compare the actual temperature with the first preset temperature and the second preset temperature, wherein the first preset temperature is greater than the second preset temperature; when the actual temperature is greater than or equal to the first preset temperature, control the first switching valve 71 and the second switching valve 81 to fully open; when the actual temperature is greater than or equal to the second preset temperature and less than the first preset temperature, control the first switching valve 71 and the second switching valve 81 to open; when the actual temperature is less than the second preset temperature, control the first switching valve 71 and the second switching valve 81 to fully close.

[0061] Specifically, when the actual temperature is greater than or equal to the second preset temperature and less than the first preset temperature, controlling the opening of the first switching valve 71 and the second switching valve 81 includes controlling the opening degree of the first switching valve 71 and the second switching valve 81 according to the actual temperature of the lubricating oil, thereby achieving more precise regulation. For example, the first preset temperature and the second preset temperature are divided into multiple intervals. When the actual temperature falls into one of the intervals, the opening degree of the first switching valve 71 and the second switching valve 81 is different from that when the actual temperature falls into another interval.

[0062] According to the control method of the present invention, when the lubricating oil temperature is detected to be insufficient, the lubricating oil in the main bearing oil reservoir 50 is introduced into the cooling tank 60 for cooling and then sent back to the compressor oil reservoir 30. The cooling tank 60 cools the lubricating oil by diverting the cooler refrigerant that is about to enter the suction chamber 24, and then guides the heat-absorbing refrigerant back into the suction chamber 24. This allows the scroll compressor 1 to achieve self-cooling of the lubricating oil with low energy consumption, which greatly ensures the load-bearing capacity of the lubricating oil and the cooling capacity of the motor 16, and ensures the load capacity of the motor 16.

[0063] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A scroll compressor, characterized in that, The compressor includes a housing and a bearing assembly, a compressor oil sump, an oil pump, and a main bearing oil reservoir disposed within the housing. The housing has an air inlet for installing an air inlet pipe. The scroll compressor also includes a cooling tank located outside the housing. The cooling tank contains an oil passage and an airflow channel, which are isolated from each other. The oil passage is connected to the main bearing oil reservoir and the compressor oil sump, respectively. The air inlet pipe includes a first air outlet and a second air outlet. The first air outlet is connected to the air inlet. The airflow channel is connected to the second air outlet and the suction chamber of the bearing assembly. The airflow channel is connected to the second air outlet through a first pipeline, and the airflow channel is connected to the air intake chamber of the bearing assembly through a second pipeline. A first switching valve is provided on the first pipeline, and / or a second switching valve is provided on the second pipeline. The opening degree of the first switching valve and the second switching valve is adjustable. A thermometer is provided in the compressor oil sump.

2. The scroll compressor according to claim 1, characterized in that, The cooling tank is provided with a spiral tube, which defines a spiral channel, and the spiral channel is configured as the oil passage.

3. The scroll compressor according to claim 2, characterized in that, The outer wall of the spiral tube is provided with at least one first heat dissipation fin.

4. The scroll compressor according to claim 1, characterized in that, The outer wall of the cooling tank is provided with at least one second heat dissipation fin.

5. The scroll compressor according to claim 1, characterized in that, The bearing assembly includes a stationary scroll, a moving scroll, and a crankshaft. The upper end of the crankshaft is connected to the moving scroll, and the stationary scroll is disposed above the moving scroll. The bottom of the crankshaft is connected to the inner wall of the housing via a lower bearing. The stationary scroll is provided with an air intake chamber and an air intake channel communicating with the air intake chamber. The second pipeline is connected to the stationary scroll so that the air intake channel is connected to the second pipeline.

6. The scroll compressor according to claim 5, characterized in that, The air intake channel includes a first channel and a second channel that are interconnected. The first channel is located between the air intake chamber and the second channel. The diameter of the first channel is smaller than the diameter of the second channel. A portion of the second pipe is located in the second channel.

7. The scroll compressor according to claim 6, characterized in that, The second conduit includes a pipe head that passes through the second channel, and a sealing element is embedded between the pipe head and the wall defining the second channel.

8. An air conditioner, characterized in that, Including the scroll compressor as described in any one of claims 1-7.

9. A control method for controlling an air conditioner as described in claim 8, characterized in that, include: Detect the actual temperature of the lubricating oil in the compressor oil sump; The first and second switching valves are controlled to maintain the same opening degree based on the actual temperature.

10. The control method according to claim 9, characterized in that, The step of controlling the first and second switching valves to maintain the same opening degree based on the actual temperature specifically includes: The actual temperature is compared with a first preset temperature and a second preset temperature, wherein the first preset temperature is greater than the second preset temperature; When the actual temperature is greater than or equal to the first preset temperature, the first and second switching valves are fully opened; when the actual temperature is greater than or equal to the second preset temperature and less than the first preset temperature, the first and second switching valves are opened; when the actual temperature is less than the second preset temperature, the first and second switching valves are fully closed.

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