Air conditioners, compressor units and their control methods

Abstract

This application relates to an air conditioner, a compressor unit, and a control method thereof. The compressor unit includes: a compressor having a volute; a first cooling assembly for cooling the volute; the first cooling assembly includes a liquid storage tank, a first liquid inlet pipe, a second liquid inlet pipe, and a third liquid inlet pipe. One end of the first liquid inlet pipe and one end of the second liquid inlet pipe are connected to the liquid storage tank, and the other ends of the first liquid inlet pipe and the second liquid inlet pipe are connected to the third liquid inlet pipe. The third liquid inlet pipe is connected to the volute, and the first liquid inlet pipe is equipped with a pressure regulating pump. An air conditioner includes the above-described compressor unit. A control method for the above-described compressor unit includes: controlling the opening and closing sequence of the second liquid inlet pipe and the third liquid inlet pipe according to the operating state of the compressor. The above-described air conditioner, compressor unit, and control method thereof enable rapid cooling of the volute and prevent coolant backflow due to insufficient hydraulic pressure.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioner, a compressor unit and a control method thereof. Background Technology

[0002] The compressor unit operates at a high temperature, with the highest discharge temperature reaching over 200℃. The high temperature generated during operation is not only detrimental to the compressor itself, but also affects the normal operation of other components. In order to ensure the stable operation of the unit, it is necessary to reduce the operating temperature of the unit. However, when the current compressor unit is cooled, the coolant is prone to backflow and the cooling effect is poor. Summary of the Invention

[0003] Therefore, it is necessary to provide an air conditioner, a compressor unit, and a control method thereof to address the problems of coolant backflow and poor cooling effect during compressor unit cooling.

[0004] A compressor unit, comprising:

[0005] A compressor, which has a volute;

[0006] A first cooling assembly is used to cool the volute casing. The first cooling assembly includes a liquid storage tank, a first liquid inlet pipe, a second liquid inlet pipe, and a third liquid inlet pipe. One end of the first liquid inlet pipe and one end of the second liquid inlet pipe are connected to the liquid storage tank. The other ends of the first liquid inlet pipe and the other ends of the second liquid inlet pipe are connected to the third liquid inlet pipe. The third liquid inlet pipe is connected to the volute casing. The first liquid inlet pipe is equipped with a pressure regulating pump.

[0007] The opening and closing sequence of the second liquid inlet pipe and the third liquid inlet pipe is controlled according to the operating status of the compressor.

[0008] In the compressor unit described above, the first liquid inlet pipe and the second liquid inlet pipe intersect and are connected to the third liquid inlet pipe. A pressure regulating pump is installed in the first liquid inlet pipe to control the opening and closing sequence of the second liquid inlet pipe and the third liquid inlet pipe according to the operating status of the compressor, thereby preparing for the hydraulic demand when the compressor casing is cooled, so as to quickly cool the casing and prevent the coolant from flowing back due to insufficient hydraulic pressure.

[0009] In one embodiment, the first cooling assembly further includes a first control valve and a second control valve. The first control valve is disposed in the second liquid inlet pipe and is used to control the opening and closing of the second liquid inlet pipe. The second control valve is disposed in the third liquid inlet pipe and is used to control the opening and closing of the third liquid inlet pipe.

[0010] In one embodiment, the compressor unit further includes a spray head, and the first cooling assembly further includes a first liquid outlet line, which connects the third liquid inlet line and the volute of the compressor, and the volute of the compressor is connected to the spray head.

[0011] In one embodiment, the first cooling assembly further includes a second liquid outlet line, which connects to the third liquid inlet line and the compressor spindle.

[0012] In one embodiment, the first cooling assembly further includes a third control valve with an adjustable opening, the third control valve being disposed in the first liquid outlet line and / or the second liquid outlet line.

[0013] In one embodiment, the first cooling assembly further includes a first liquid supply line and a liquid level detection device. The liquid level detection device is disposed in the liquid storage tank, and the first liquid supply line is connected to the liquid storage tank. The opening and closing of the first liquid supply line is controlled according to the detection result of the liquid level detection device.

[0014] In one embodiment, the compressor unit further includes a second cooling assembly, which is in communication with the compressor drive and is used to cool the compressor drive.

[0015] In one embodiment, the second cooling assembly includes a cooler, a second liquid supply line, and a return line. The outlet of the cooler, the second liquid supply line, the drive unit of the compressor, the return line, and the inlet of the cooler are sequentially connected to form a loop.

[0016] In one embodiment, the second cooling assembly further includes a surface cooler disposed in the return line.

[0017] In one embodiment, the second cooling assembly further includes a shut-off valve disposed in the second liquid supply line and used to control the opening and closing of the second liquid supply line.

[0018] An air conditioner includes the compressor unit described above.

[0019] The air conditioner compressor unit described above is designed to meet the hydraulic pressure requirements of the compressor casing during cooling, so as to cool the casing quickly and prevent the coolant from flowing back due to insufficient hydraulic pressure.

[0020] A control method for the above-mentioned compressor unit includes:

[0021] The opening and closing sequence of the second liquid inlet pipe and the third liquid inlet pipe is controlled according to the operating status of the compressor;

[0022] When the compressor is in the start-up preparation state, the second liquid inlet line is opened and the third liquid inlet line is closed, and the pressure regulating pump is started;

[0023] When the compressor is in normal start-up state, the second liquid inlet line is closed and the third liquid inlet line is opened.

[0024] The above-mentioned compressor unit control method involves the first liquid inlet pipe converging with the second liquid inlet pipe and connecting to the third liquid inlet pipe. A pressure regulating pump is installed in the first liquid inlet pipe. The opening and closing sequence of the second and third liquid inlet pipes is controlled according to the compressor's operating status, thereby preparing for the hydraulic demand of the compressor casing during cooling, so as to enable the casing to cool down quickly and prevent the coolant from flowing back due to insufficient hydraulic pressure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a compressor unit in one embodiment.

[0026] Figure 2 This is a schematic diagram of the compressor unit in another embodiment.

[0027] Figure label:

[0028] 100. Compressor; 200. First cooling assembly; 210. Liquid storage tank; 220. First liquid inlet line; 221. Pressure regulating pump; 222. Pressure detection element; 223. First heating element; 224. First filter; 230. Second liquid inlet line; 231. First control valve; 240. Third liquid inlet line; 241. Second control valve; 250. First liquid outlet line; 251. Third control valve; 260. Second liquid outlet line; 270. First liquid supply line; 271. Liquid level detection element; 272. Fourth control valve; 300. Spray head; 400. Second cooling assembly; 410. Cooler; 420. Second liquid supply line; 421. Second filter; 422. Second heating element; 423. Shut-off valve; 430. Return line; 431. Surface cooler. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0031] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element present.

[0033] Please refer to Figure 1 In one embodiment, the compressor unit includes a compressor 100 and a first cooling assembly 200. The compressor 100 has a volute, and the first cooling assembly 200 is used to cool the volute.

[0034] The first cooling assembly 200 includes a liquid storage tank 210, a first liquid inlet pipe 220, a second liquid inlet pipe 230, and a third liquid inlet pipe 240. One end of the first liquid inlet pipe 220 and one end of the second liquid inlet pipe 230 are connected to the liquid storage tank 210, and the other end of the first liquid inlet pipe 220 and the other end of the second liquid inlet pipe 230 are connected to the third liquid inlet pipe 240. The third liquid inlet pipe 240 is connected to the volute. The first liquid inlet pipe 220 is equipped with a pressure regulating pump 221, which controls the opening and closing sequence of the second liquid inlet pipe 230 and the third liquid inlet pipe 240 according to the operating status of the compressor 100.

[0035] It should be noted that the reservoir 210 is used to store coolant, and the first inlet pipe 220 is normally open. Since the first inlet pipe 220 intersects with the second inlet pipe 230 and connects to the third inlet pipe 240, and since the first inlet pipe 220 is equipped with a pressure regulating pump 221, the hydraulic pressure in the first inlet pipe 220 can be adjusted before it intersects with the third inlet pipe 240. By controlling the opening and closing sequence of the second inlet pipe 230 and the third inlet pipe 240, the hydraulic pressure of the coolant output to the volute can be controlled.

[0036] For example, when the compressor 100 is in the start-up preparation state, the second liquid inlet pipe 230 is open and the third liquid inlet pipe 240 is closed. The liquid storage tank 210, the first liquid inlet pipe 220 and the second liquid inlet pipe 230 form a circulation loop. That is, the coolant in the liquid storage tank 210 is regulated by the pressure regulating pump 221 and then circulates in the first liquid inlet pipe 220 and the second liquid inlet pipe 230. At this time, it is ready for the hydraulic demand when the volute is cooled. When the compressor 100 is in the normal start-up state, the second liquid inlet pipe 230 is closed and the third liquid inlet pipe 240 is open. The coolant will be quickly delivered to the volute through the third liquid inlet pipe 240 so that the volute can be cooled down quickly.

[0037] In the compressor unit described above, the first liquid inlet pipe 220 and the second liquid inlet pipe 230 intersect and are connected to the third liquid inlet pipe 240. A pressure regulating pump 221 is installed in the first liquid inlet pipe 220 to control the opening and closing sequence of the second liquid inlet pipe 230 and the third liquid inlet pipe 240 according to the operating status of the compressor 100, thereby preparing for the hydraulic demand of the compressor 100's volute cooling, so as to enable the volute to cool down quickly and prevent the coolant from flowing back due to insufficient hydraulic pressure.

[0038] In the above embodiments, the first cooling assembly 200 further includes a pressure detection element 222, a first heating element 223 and a first filter 224 disposed in the first liquid inlet pipe 220, wherein the first heating element 223, the first filter 224, the pressure regulating pump 221 and the pressure detection element 222 are arranged sequentially along the flow direction of the coolant.

[0039] The pressure detection element 222 is used to detect the hydraulic pressure of the first liquid inlet pipe 220, and the pressure applied to the first liquid inlet pipe 220 by the pressure regulating pump 221 is adjusted according to the detection result of the pressure detection element 222; the first filter 224 is used to filter impurities in the coolant of the first liquid inlet pipe 220; and the first heating element 223 is used to heat the first liquid inlet pipe 220 to prevent the first liquid inlet pipe 220 from freezing when the temperature is too low.

[0040] For example, when the hydraulic pressure detected by the pressure sensor 222 is higher than the preset value, the pressure regulating pump 221 is controlled to reduce the pressure; when the hydraulic pressure detected by the pressure sensor 222 is lower than the preset value, the pressure regulating pump 221 is controlled to increase the pressure.

[0041] Optionally, the pressure sensing element 222 can be a single-function or multi-function sensor, the first heating element 223 is a heating line wrapped around the first liquid inlet line 220, and the first filter 224 can be a pre-filter, medium-efficiency filter, or high-efficiency filter. Here, the types of the pressure sensing element 222, the first heating element 223, and the first filter 224 are not specifically limited.

[0042] In the above embodiment, the number of compressors 100 can be one, such as... Figure 1 As shown. The number of compressors 100 can also be at least two, such as... Figure 2 As shown, at this time, each compressor 100 can be connected in series.

[0043] Please refer to Figure 1 The first cooling assembly 200 also includes a first control valve 231 and a second control valve 241. The first control valve 231 is located in the second liquid inlet pipe 230 and is used to control the opening and closing of the second liquid inlet pipe 230. The second control valve 241 is located in the third liquid inlet pipe 240 and is used to control the opening and closing of the third liquid inlet pipe 240.

[0044] For example, when the compressor 100 is in the start-up preparation state, the second liquid inlet line 230 is open and the third liquid inlet line 240 is closed. At this time, the first control valve 231 is open and the second control valve 241 is closed. When the compressor 100 is in the normal start-up state, the second liquid inlet line 230 is closed and the third liquid inlet line 240 is open. At this time, the first control valve 231 is closed and the second control valve 241 is open.

[0045] In this embodiment, both the first control valve 231 and the second control valve 241 are solenoid valves to achieve automatic control of the liquid inlet pipeline. In other embodiments, the first control valve 231 and the second control valve 241 may also be mechanical valves or other types of valves.

[0046] Further, please refer to Figure 1The compressor unit also includes a spray head 300, and the first cooling assembly 200 also includes a first liquid outlet pipe 250, which is connected to the third liquid inlet pipe 240 and the volute of the compressor 100. The volute of the compressor 100 is connected to the spray head 300.

[0047] Understandably, the coolant output from the third inlet pipe 240 flows into the volute through the first outlet pipe 250, exchanges heat with the volute, and is then sprayed into the steam system by the spray head 300. The coolant vaporizes under high temperature conditions and circulates within the steam system. As the coolant absorbs heat during vaporization, it reduces the superheat of the steam in the steam system.

[0048] In this embodiment, the number of first liquid outlet pipes 250 is not limited to one; that is, the number of first liquid outlet pipes 250 can be at least two. When the number of first liquid outlet pipes 250 is at least two, each first liquid outlet pipe 250 is connected in parallel between the third liquid inlet pipe 240 and the volute of the compressor 100.

[0049] In this embodiment, the number of spray heads 300 is not limited to one; the number of spray heads 300 can be at least two.

[0050] Furthermore, please refer to Figure 1 The first cooling assembly 200 also includes a second liquid outlet pipe 260, which is connected to a third liquid inlet pipe 240 and the main shaft of the compressor 100.

[0051] It is understandable that the coolant enters the main shaft of the compressor 100 through the third inlet pipe 240 and the second outlet pipe 260, and participates in the shaft sealing to prevent steam leakage while reducing the temperature of the compressor 100.

[0052] In this embodiment, the number of second liquid outlet pipes 260 is not limited to one; that is, the number of second liquid outlet pipes 260 can be at least two. When the number of second liquid outlet pipes 260 is at least two, each first liquid outlet pipe 250 is connected in parallel between the third liquid inlet pipe 240 and the main shaft of the compressor 100.

[0053] Please refer to Figure 1 The first cooling assembly 200 also includes a third control valve 251 with an adjustable opening, the third control valve 251 being disposed in the first liquid outlet line 250 and / or the second liquid outlet line 260.

[0054] Specifically, the third control valve 251 is an adjustable water valve. The first outlet pipe 250 and / or the second outlet pipe 260 require different pressures and flow rates. The third control valve 251 can adjust the water pressure and flow rate of the first outlet pipe 250 and / or the second outlet pipe 260 according to actual needs.

[0055] For example, refer to Figure 1 There are two first liquid outlet pipes 250 and two second liquid outlet pipes 260. Each first liquid outlet pipe 250 and second liquid outlet pipe 260 is equipped with a third control valve 251.

[0056] In this embodiment, the third control valve 251 is a solenoid valve to achieve automatic control of the liquid outlet pipeline. In other embodiments, the third control valve 251 may also be a mechanical valve or other types of valves.

[0057] Please refer to Figure 1 The first cooling assembly 200 also includes a first liquid supply line 270 and a liquid level detection element 271. The liquid level detection element 271 is located in the liquid storage tank 210. The first liquid supply line 270 is connected to the liquid storage tank 210. The opening and closing of the first liquid supply line 270 is controlled according to the detection result of the liquid level detection element 271.

[0058] It should be noted that the first liquid supply line 270 is used to connect the liquid storage tank 210 and the external liquid supply mechanism, and the external liquid supply mechanism replenishes the liquid storage tank 210.

[0059] In this embodiment, there can be two liquid level detection elements 271. For example, the two liquid level detection elements 271 are respectively installed at a first height position and a second height position in the liquid storage tank 210. The first height position is higher than the second height position. When the liquid level in the liquid storage tank 210 is lower than the second height position, the first liquid supply line 270 is controlled to open to replenish the liquid storage tank 210 until the first height position is reached.

[0060] In other embodiments, the number of liquid level detection elements 271 may be one or at least three. For example, in an embodiment with only one liquid level detection element 271, when the liquid level detected by the liquid level detection element 271 is higher than a preset value, the first liquid supply line 270 is controlled to close; when the liquid level detected by the liquid level detection element 271 is lower than the preset value, the first liquid supply line 270 is controlled to open to replenish the liquid storage tank 210.

[0061] Further, please refer to Figure 1 The first cooling assembly 200 also includes a fourth control valve 272, which is located in the first liquid supply line 270 and is used to control the opening and closing of the first liquid supply line 270.

[0062] In this embodiment, the fourth control valve 272 is a solenoid valve to achieve automatic control of the pipeline. In other embodiments, the fourth control valve 272 may also be a mechanical valve or other types of valves.

[0063] Please refer to Figure 1The compressor unit also includes a second cooling assembly 400, which is connected to the drive component of the compressor 100 and is used to cool the drive component of the compressor 100. In this way, different cooling assemblies can be used to cool different components of the compressor 100, resulting in better cooling effect and higher efficiency.

[0064] For details, please refer to Figure 1 The second cooling assembly 400 includes a cooler 410, a second liquid supply line 420 and a return line 430. The outlet of the cooler 410, the second liquid supply line 420, the drive unit of the compressor 100, the return line 430 and the inlet of the cooler 410 are connected in sequence to form a circuit.

[0065] It should be noted that the driving component of compressor 100 is also the motor of compressor 100. The cooling of the driving component of compressor 100 adopts a closed-loop circulation method. The cooler 410 has a built-in water pump and water tank. The chilled water produced by the cooler 410 is pressurized by the built-in water pump and enters the internal flow channel of compressor 100 through the second liquid supply line 420. After heat exchange, the chilled water flows back to the built-in water tank of the cooler through the return line 430 for cooling and participates in the next cycle.

[0066] In this embodiment, the number of the second liquid supply line 420 and the return line 430 is not limited to one; the number of the second liquid supply line 420 and the return line 430 can both be at least two.

[0067] In the above embodiment, the second cooling assembly 400 further includes a second filter 421 and a second heating element 422 disposed in the second liquid supply pipeline 420, and the second filter 421 and the second heating element 422 are arranged sequentially along the flow direction of the coolant.

[0068] The second filter 421 is used to filter impurities in the coolant of the second liquid supply pipe 420, and the second heating element 422 is used to heat the second liquid supply pipe 420 to prevent the second liquid supply pipe 420 from freezing when the temperature is too low.

[0069] Optionally, the second filter 421 can be a pre-filter, a medium-efficiency filter, or a high-efficiency filter, and the second heating element 422 is a heating line wound around the outside of the second liquid supply line 420. Here, the type of the second heating element 422 and the second filter 421 is not specifically limited.

[0070] Further, please refer to Figure 1 The second cooling assembly 400 also includes a surface cooler 431, which is located in the return line 430.

[0071] It should be noted that the surface cooler 431 is located in the return pipe 430. After the chilled water is cooled by heat exchange through the surface cooler 431, it flows into the cooler 410 through the return pipe 430, which helps to reduce energy consumption.

[0072] Please refer to Figure 1 The second cooling assembly 400 also includes a shut-off valve 423, which is located in the second liquid supply line 420 and is used to control the opening and closing of the second liquid supply line 420.

[0073] For example, when a component in the compressor unit needs to be replaced, the shut-off valve 423 is adjusted to close the second liquid supply line 420; when the component in the compressor unit has been replaced, the shut-off valve 423 is adjusted to open the second liquid supply line 420.

[0074] Please refer to Figure 1 In one embodiment, the air conditioner includes the compressor unit described above.

[0075] It should be noted that an air conditioner includes not only the compressor unit, but also other components such as the condenser assembly.

[0076] In the aforementioned air conditioner, the first liquid inlet pipe 220 of the compressor unit intersects with the second liquid inlet pipe 230 and is connected to the third liquid inlet pipe 240. A pressure regulating pump 221 is installed in the first liquid inlet pipe 220 to control the opening and closing sequence of the second liquid inlet pipe 230 and the third liquid inlet pipe 240 according to the operating status of the compressor 100, thereby preparing for the hydraulic demand of the compressor 100's volute during cooling, so as to enable the volute to cool down quickly and prevent the coolant from flowing back due to insufficient hydraulic pressure.

[0077] Please refer to Figure 1 A method for controlling a compressor unit in one embodiment includes:

[0078] The opening and closing sequence of the second liquid inlet pipe 230 and the third liquid inlet pipe 240 is controlled according to the operating status of the compressor 100.

[0079] When the compressor 100 is in the start-up preparation state, the second liquid inlet line 230 is closed and the third liquid inlet line 240 is opened, and the pressure regulating pump 221 is started.

[0080] When the compressor 100 is in normal start-up state, the second liquid inlet pipe 230 is opened and the third liquid inlet pipe 240 is closed.

[0081] For example, when the compressor 100 is in the start-up preparation state, the second liquid inlet pipe 230 is open and the third liquid inlet pipe 240 is closed. The liquid storage tank 210, the first liquid inlet pipe 220 and the second liquid inlet pipe 230 form a circulation loop. That is, the coolant in the liquid storage tank 210 is regulated by the pressure regulating pump 221 and then circulates in the first liquid inlet pipe 220 and the second liquid inlet pipe 230. At this time, it is ready for the hydraulic demand when the volute is cooled. When the compressor 100 is in the normal start-up state, the second liquid inlet pipe 230 is closed and the third liquid inlet pipe 240 is open. The coolant will be quickly delivered to the volute through the third liquid inlet pipe 240 so that the volute can be cooled down quickly.

[0082] In the above-mentioned compressor unit control method, the first liquid inlet pipe 220 and the second liquid inlet pipe 230 intersect and are connected to the third liquid inlet pipe 240. A pressure regulating pump 221 is installed in the first liquid inlet pipe 220. The opening and closing sequence of the second liquid inlet pipe 230 and the third liquid inlet pipe 240 is controlled according to the operating status of the compressor 100, so as to prepare for the hydraulic demand of the compressor 100 volute during cooling, so as to enable the volute to cool down quickly and prevent the coolant from flowing back due to insufficient hydraulic pressure.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A compressor package, characterized by, The application relates to a compressor unit, comprising: a compressor (100) with a volute; a first cooling assembly (200) for cooling the volute; the first cooling assembly (200) comprises a liquid storage tank (210), a first liquid inlet pipeline (220), a second liquid inlet pipeline (230) and a third liquid inlet pipeline (240), one end of the first liquid inlet pipeline (220) and one end of the second liquid inlet pipeline (230) are communicated with the liquid storage tank (210), the other end of the first liquid inlet pipeline (220) and the other end of the second liquid inlet pipeline (230) are communicated with the third liquid inlet pipeline (240), the third liquid inlet pipeline (240) is communicated with the volute, and the first liquid inlet pipeline (220) is provided with a pressure regulating pump (221); wherein the opening and closing sequence of the second liquid inlet pipeline (230) and the third liquid inlet pipeline (240) is controlled according to the running state of the compressor (100); when the compressor (100) is in a starting preparation state, the second liquid inlet pipeline (230) is controlled to be opened and the third liquid inlet pipeline (240) is controlled to be closed, and the pressure regulating pump (221) is started; when the compressor (100) is in a normal starting state, the second liquid inlet pipeline (230) is controlled to be closed and the third liquid inlet pipeline (240) is controlled to be opened.

2. The compressor package of claim 1, wherein, The first cooling assembly (200) further comprises a first control valve (231) and a second control valve (241), the first control valve (231) is arranged on the second liquid inlet pipeline (230) and is used for controlling the opening and closing of the second liquid inlet pipeline (230), and the second control valve (241) is arranged on the third liquid inlet pipeline (240) and is used for controlling the opening and closing of the third liquid inlet pipeline (240).

3. The compressor package of claim 1, wherein, The compressor unit further comprises a spray head (300), the first cooling assembly (200) further comprises a first liquid outlet pipeline (250), the first liquid outlet pipeline (250) is communicated with the third liquid inlet pipeline (240) and the volute of the compressor (100), and the volute of the compressor (100) is communicated with the spray head (300).

4. The compressor package of claim 3, wherein, The first cooling assembly (200) further comprises a second liquid outlet pipeline (260), the second liquid outlet pipeline (260) is communicated with the third liquid inlet pipeline (240) and the main shaft of the compressor (100).

5. The compressor package of claim 4, wherein, The first cooling assembly (200) further comprises a third control valve (251) with an adjustable opening degree, and the third control valve (251) is arranged on the first liquid outlet pipeline (250) and / or the second liquid outlet pipeline (260).

6. The compressor package of claim 1, wherein, The first cooling assembly (200) further comprises a first liquid supply pipeline (270) and a liquid level detection member (271), the liquid level detection member (271) is arranged in the liquid storage tank (210), the first liquid supply pipeline (270) is communicated with the liquid storage tank (210), and the opening and closing of the first liquid supply pipeline (270) is controlled according to the detection result of the liquid level detection member (271).

7. The compressor package of claim 1, wherein, The compressor unit further comprises a second cooling assembly (400) in communication with the driving part of the compressor (100) and used for cooling the driving part of the compressor (100).

8. The compressor package of claim 7, wherein, The second cooling assembly (400) comprises a cooler (410), a second liquid supply pipeline (420) and a return pipeline (430), and the outlet of the cooler (410), the second liquid supply pipeline (420), the driving part of the compressor (100), the return pipeline (430) and the inlet of the cooler (410) are sequentially connected and form a loop.

9. The compressor package of claim 8, wherein, The second cooling assembly (400) further comprises a surface cooler (431) arranged in the return pipeline (430).

10. The compressor package of claim 8, wherein, The second cooling assembly (400) further comprises a stop valve (423) arranged in the second liquid supply pipeline (420) and used for controlling the opening and closing of the second liquid supply pipeline (420).

11. An air conditioner characterized by comprising: The compressor unit comprises the compressor unit according to any one of claims 1-10.

12. A control method of a compressor unit as claimed in any one of claims 1-10, characterized in that, The compressor unit comprises: controlling the opening and closing sequence of the second liquid inlet pipeline (230) and the third liquid inlet pipeline (240) according to the operating state of the compressor (100); when the compressor (100) is in a starting preparation state, controlling the second liquid inlet pipeline (230) to be opened and the third liquid inlet pipeline (240) to be closed, and starting the pressure regulating pump (221); when the compressor (100) is in a normal starting state, controlling the second liquid inlet pipeline (230) to be closed and the third liquid inlet pipeline (240) to be opened.

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