A cooling system, control method, and air conditioning unit

Abstract

The application discloses a cooling system, a control method and an air conditioning unit, and relates to the technical field of air conditioners. The cooling system comprises an indoor heat exchanger, a compressor, an outdoor heat exchanger and a first throttling element which are sequentially connected through pipelines, and further comprises a liquid cooling cavity used for cooling the compressor, wherein the inlet of the liquid cooling cavity is connected to the pipeline between the first throttling element and the outdoor heat exchanger and is used for inputting liquid refrigerant; the first outlet of the liquid cooling cavity is connected to the air inlet of the compressor or the indoor heat exchanger and is used for discharging gaseous refrigerant after heat exchange; the liquid cooling cavity is provided with a pressure detection element used for detecting the pressure of the refrigerant in the liquid cooling cavity; the inlet of the liquid cooling cavity is provided with a second throttling element; the first outlet of the liquid cooling cavity is provided with a third throttling element; and the second throttling element and the third throttling element can adjust the opening degree according to the detection result of the pressure detection element, so that the refrigerant in the liquid cooling cavity is at a preset saturated temperature. The condensation problem caused by refrigerant throttling and cooling is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a cooling system, a control method and an air conditioning unit. BACKGROUND

[0002] The integrated centrifugal compressor integrates a frequency converter on the compressor, saves the space of the on-board frequency converter, enables the unit structure to be more compact and smaller, and the integrated compressor is the preferred solution for modular units.

[0003] On the integrated compressor, the motor, the IGBT of the frequency converter, the switching power supply and the capacitor are heat generating devices. If the temperature of these devices is too high, the capacity of each device will be reduced, and even a fault will occur, which cannot be used normally. In order to ensure the normal and reliable operation of the compressor, the compressor needs to be controlled for thermal management. The commonly used cooling scheme is to take high-pressure and high-temperature refrigerant liquid from the condenser of the unit, to cool and reduce the temperature of the above-mentioned devices after throttling, and then the refrigerant enters the unit at a position with lower pressure. This scheme has large cooling capacity, can ensure sufficient cooling, and avoids the problem of overheating of the devices. However, because the temperature of the refrigerant after throttling is low, when the refrigerant with low temperature enters the cooling structure of the compressor, the surface temperature of the cooling structure will be low. When the ambient temperature around the cooling structure is relatively high and the humidity is large, condensation will occur. If there is condensation water on the electrical devices, it will cause the compressor to frequently malfunction and cannot work normally, and even cause the device to short circuit and burn out.

[0004] How to avoid the condensation problem caused by the use of refrigerant throttling and temperature reduction has become a technical problem to be solved urgently. SUMMARY

[0005] The main purpose of the present application is to provide a cooling system, a control method and an air conditioning unit, which aims to avoid the condensation problem caused by the use of refrigerant throttling and temperature reduction.

[0006] In order to achieve the above-mentioned purpose, the present application provides a cooling system, which comprises an indoor heat exchanger, a compressor, an outdoor heat exchanger and a first throttling element connected in sequence through a pipeline, and further comprises a liquid cooling cavity for cooling the compressor, the inlet of the liquid cooling cavity is connected to the pipeline between the first throttling element and the outdoor heat exchanger for inputting liquid refrigerant, the first outlet of the liquid cooling cavity is connected to the gas inlet of the compressor or the indoor heat exchanger for discharging gaseous refrigerant after heat exchange, the liquid cooling cavity is provided with a pressure detection element for detecting the pressure of the refrigerant in the liquid cooling cavity, the inlet of the liquid cooling cavity is provided with a second throttling element, and the first outlet of the liquid cooling cavity is provided with a third throttling element, the opening degrees of the second throttling element and the third throttling element can be adjusted according to the detection result of the pressure detection element, so that the refrigerant in the liquid cooling cavity is at a preset saturation temperature.

[0007] In an embodiment of the present application, further comprising:

[0008] A heat pipe connected to the compressor and located in the liquid cooling cavity, for conducting heat generated by the compressor out and exchanging heat with the refrigerant in the liquid cooling cavity.

[0009] In an embodiment of the present application, further comprising:

[0010] A cold plate arranged between the compressor and the heat pipe, for fixing the heat pipe.

[0011] In an embodiment of the present application, the liquid cooling cavity is further provided with a second outlet for discharging liquid refrigerant, and the second outlet is provided with a fourth throttling element for adjusting the opening degree according to the detection result of the pressure detection element, so that the refrigerant in the liquid cooling cavity is in a saturated state.

[0012] In an embodiment of the present application, the horizontal height of the inlet is less than the horizontal height of the second outlet, and the horizontal height of the second outlet is less than the horizontal height of the first outlet.

[0013] In an embodiment of the present application, the liquid cooling cavity is further provided with a liquid level detection element for detecting the liquid level.

[0014] The present application also discloses a control method of a cooling system, comprising the following steps:

[0015] Obtaining the pressure value in the liquid cooling cavity;

[0016] Determining whether the pressure value of the liquid cooling cavity is equal to a preset value;

[0017] When the pressure value is not equal to the preset value, determining whether the pressure value is greater than the preset value;

[0018] When the pressure value is greater than the preset value, reducing the opening degree of the second throttling element and increasing the opening degrees of the third throttling element and the fourth throttling element.

[0019] In an embodiment of the present application, when the pressure value is less than the preset value, the opening degree of the second throttling element is increased, and the opening degrees of the third throttling element and the fourth throttling element are reduced.

[0020] In an embodiment of the present application, further comprising:

[0021] Obtaining the liquid level height in the liquid cooling cavity;

[0022] Determining whether the liquid level height is greater than a first preset threshold value, and when the liquid level height is greater than the first preset threshold value, reducing the opening degree of the second throttling element and increasing the opening degree of the fourth throttling element.

[0023] In one embodiment of the present application, when the liquid level height is less than a first preset threshold, it is determined whether the liquid level height is less than a second preset threshold; when the liquid level height is less than the second preset threshold, the opening of the second throttling element is increased, and the opening of the fourth throttling element is reduced.

[0024] The present application also discloses an air-conditioning unit, which adopts any of the cooling systems described above.

[0025] The above technical solution sets a branch in the refrigerant circulation loop, connects the liquid cooling chamber to the branch, and connects the liquid cooling chamber to the compressor. Utilizing the isothermal characteristics of the connection between the liquid cooling chamber and the compressor, the pressure in the liquid cooling chamber is adjusted to adjust the saturation temperature of the liquid refrigerant, thereby maintaining the compressor at an appropriate operating temperature and preventing condensation on the compressor surface. The structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0027] Fig. 1 This is a schematic structural diagram of the first embodiment of the present invention.

[0028] Fig. 2 Schematic diagram of the flow structure of the control method of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation of the present invention.

[0030] like Figs. 1-2 As shown, in order to achieve the above-mentioned objectives, the present invention proposes a cooling system, comprising an indoor heat exchanger 19, a compressor 20, an outdoor heat exchanger 18, and a first throttling element 21 connected in sequence by pipelines, and also comprising a liquid cooling chamber 10 for cooling the compressor 20, wherein the inlet of the liquid cooling chamber 10 is connected to the pipeline between the first throttling element 21 and the outdoor heat exchanger 18 for inputting liquid refrigerant; the first outlet of the liquid cooling chamber 10 is connected to the air inlet of the compressor 20 or the indoor heat exchanger 19 for discharging the gaseous refrigerant after heat exchange; the liquid cooling chamber 10 is provided with a pressure detecting element 16 for detecting the pressure of the refrigerant in the liquid cooling chamber 10, the inlet of the liquid cooling chamber 10 is provided with a second throttling element 11, and the first outlet of the liquid cooling chamber 10 is provided with a third throttling element 12, the second throttling element 11 and the third throttling element 12 can adjust the opening according to the detection result of the pressure detecting element 16 so that the refrigerant in the liquid cooling chamber 10 is at a preset saturation temperature.

[0031] Specifically, the application provides a cooling system, which comprises an indoor heat exchanger 19, a compressor 20, an outdoor heat exchanger 18, a first throttling element 21, a liquid cooling cavity 10, a second throttling element 11, a third throttling element 12 and a pressure detecting element 16.

[0032] The indoor heat exchanger 19 is a heat exchanger commonly used in the prior art, and in the application, the indoor heat exchanger 19 is used as an evaporator because high-temperature liquid refrigerant needs to be introduced from the outdoor heat exchanger 18.

[0033] The outdoor heat exchanger 18 is a heat exchanger commonly used in the prior art, and in the application, the outdoor heat exchanger 18 is used as a condenser because high-temperature liquid refrigerant needs to be introduced from the outdoor heat exchanger 18.

[0034] The compressor 20 is a centrifugal compressor 20 commonly used in the prior art, and the centrifugal compressor 20 has the advantages of large air volume, simple and compact structure, light weight, small unit size and small land occupation.

[0035] The first throttling element 21 is a throttling element commonly used in the prior art, and the first throttling element 21 is not described here because it is the prior art.

[0036] The first throttling element 21, the outdoor heat exchanger 18, the compressor 20 and the indoor heat exchanger 19 constitute a refrigerant circulation loop.

[0037] The liquid cooling cavity 10 refers to a cavity which is isolated from the outside space and internally stores liquid refrigerant. The liquid cooling cavity 10 is connected to the compressor 20 and used for cooling the compressor 20. The working principle is that the compressor 20 generates heat, the generated heat is transferred to the liquid cooling cavity 10, and the liquid refrigerant in the liquid cooling cavity 10 is converted into gaseous refrigerant after being heated, so as to realize the cooling of the compressor 20.

[0038] The inlet of the liquid cooling cavity 10 is connected to the pipeline between the first throttling element 21 and the outdoor heat exchanger 18, so that the liquid refrigerant in the outdoor heat exchanger 18 can be introduced into the liquid cooling cavity 10. The liquid cooling cavity 10 is connected to the pipeline between the first throttling element 21 and the outdoor heat exchanger 18 through the pipeline.

[0039] The first outlet of the liquid cooling cavity 10 is used for discharging gaseous refrigerant, which is generated after the liquid refrigerant is vaporized and thus absorbs the heat of the compressor 20. The first outlet of the liquid cooling cavity 10 is directly connected to the gas inlet of the compressor 20 or the inlet of the indoor heat exchanger 19. When the first outlet of the liquid cooling cavity 10 is directly connected to the compressor 20, the gas compensation of the compressor 20 is realized; when the first outlet of the liquid cooling cavity 10 is directly connected to the indoor heat exchanger 19, the gaseous refrigerant is subjected to heat exchange with indoor air again, and the refrigerant heat absorption efficiency is improved.

[0040] The pressure detecting member 16 is a pressure detecting member 16 commonly used in the prior art, which is used to detect the pressure in the liquid cooling cavity 10. Since the vaporization temperature of the refrigerant is related to the pressure, the saturation temperature of the refrigerant can be controlled by changing the pressure.

[0041] A second throttling element 11 is arranged at the inlet of the liquid cooling cavity 10. The second throttling element 11 is the same as the first throttling element 21 and has the same advantages and properties, which will not be described here one by one. The second throttling element 11 is used to open or close the inlet of the liquid cooling cavity 10.

[0042] A third throttling element 12 is arranged at the first outlet of the liquid cooling cavity 10. The third throttling element 12 is the same as the first throttling element 21 and has the same advantages and properties, which will not be described here one by one. The third throttling element 12 is used to open or close the first outlet of the liquid cooling cavity 10.

[0043] The second throttling element 11 and the third throttling element 12 adjust the opening degree according to the detection result of the pressure detecting member 16, so that the refrigerant in the liquid cooling cavity 10 is in a saturated state. The saturated state in the present application refers to the critical value at which the liquid refrigerant changes into gaseous refrigerant.

[0044] For example, when the pressure in the liquid cooling cavity 10 is less than a preset threshold value, the opening degree of the second throttling element 11 is increased and the opening degree of the third throttling element 12 is decreased, so that the pressure in the liquid cooling cavity 10 is increased to the preset parameter, thereby increasing the vaporization temperature of the refrigerant.

[0045] When the pressure in the liquid cooling cavity 10 is greater than the preset parameter, the opening degree of the second throttling element 11 is decreased and the opening degree of the third throttling element 12 is increased, so that the pressure in the liquid cooling cavity 10 is decreased to the preset parameter, thereby reducing the vaporization temperature of the refrigerant.

[0046] Since the liquid cooling cavity 10 is connected with the compressor 20, the isothermal characteristic is utilized when the liquid cooling cavity 10 is connected with the compressor 20, the temperature of the compressor 20 is equal to the temperature of the liquid refrigerant, the saturation temperature of the liquid refrigerant is adjusted, the working temperature of the compressor 20 is adjusted, the compressor 20 can always be kept at a proper operating temperature, thereby avoiding condensation on the surface of the compressor 20.

[0047] By adopting the above technical scheme, a branch is arranged on the refrigerant circulation loop, the liquid cooling cavity 10 is connected on the branch, the liquid cooling cavity 10 is connected with the compressor 20, the isothermal characteristic is utilized when the liquid cooling cavity 10 is connected with the compressor 20, the pressure in the liquid cooling cavity 10 is adjusted, the saturation temperature of the liquid refrigerant is adjusted, the compressor 20 is kept at a proper operating temperature, thereby avoiding condensation on the surface of the compressor 20. The structure is simple and easy to implement.

[0048] In an embodiment of the present application, further comprising:

[0049] A heat pipe 15 is connected to the compressor 20 and located in the liquid cooling cavity 10, and is used to conduct the heat generated by the compressor 20 and exchange heat with the refrigerant in the liquid cooling cavity 10.

[0050] Specifically, the cooling system further comprises the heat pipe 15.

[0051] The heat pipe 15 is made of metal material, and the heat pipe 15 made of metal material has the advantages of strong supporting capacity, wear resistance, and good heat conduction performance. The heat pipe 15 is connected to the compressor 20, and the heat pipe 15 and the compressor 20 are connected in a fixed connection mode, such as welding. The heat pipe 15 and the compressor 20 are connected in a fixed connection mode, which can improve the connection strength between the heat pipe 15 and the compressor 20 and ensure the stability of the heat pipe 15 during operation. Of course, according to the design needs, the heat pipe 15 and the compressor 20 can also be connected in a detachable mode, such as bolt connection, screw connection, etc. The heat pipe 15 and the compressor 20 are connected in a detachable mode, which can facilitate the installation and disassembly of the heat pipe 15 and facilitate the later maintenance.

[0052] The heat pipe 15 is located in the liquid cooling cavity 10, and the heat generated by the compressor 20 is conducted to the heat pipe 15, and the heat pipe 15 exchanges heat with the refrigerant in the liquid cooling cavity 10, so as to realize the exchange of heat between the compressor 20 and the refrigerant. The cooling of the compressor 20 is realized. Since the heat pipe 15 is directly inserted into the liquid cooling cavity 10, the temperature of the heat pipe 15 is equal to the temperature of the refrigerant, and at this time the temperature of the heat pipe 15 is equal to the temperature of the compressor 20. Therefore, adjusting the refrigerant to maintain a suitable saturated temperature can make the compressor 20 be at a more suitable temperature, thereby avoiding the generation of condensation on the compressor 20.

[0053] By adopting the above technical scheme, the heat pipe 15 is arranged to conduct the heat of the compressor 20, which facilitates the position fixation between the compressor 20 and the liquid cooling cavity 10, has a simple structure, and is easy to implement.

[0054] In an embodiment of the present application, further comprising:

[0055] A cold plate 14 is arranged between the compressor 20 and the heat pipe 15, and is used to fix the heat pipe 15.

[0056] Specifically, the cooling system further comprises the cold plate 14, which is made of metal material. The cold plate 14 made of metal material has the advantages of strong supporting capacity and good heat conduction performance.

[0057] The cold plate 14 is arranged between the compressor 20 and the heat pipe 15 to realize heat conduction between the compressor 20 and the heat pipe 15. The cold plate 14 and the compressor 20 can be connected in a fixed connection mode, for example, welding. The cold plate 14 and the compressor 20 are connected in a fixed connection mode, which can improve the connection strength between the cold plate 14 and the compressor 20 and ensure the stability of the cold plate 14 during operation. Of course, according to the design needs, the cold plate 14 and the compressor 20 can also be connected in a detachable manner, for example, screw connection, bolt connection and the like. The cold plate 14 and the compressor 20 are connected in a detachable manner, which can facilitate the installation and disassembly of the cold plate 14 and facilitate the later maintenance.

[0058] The cold plate 14 and the heat pipe 15 are connected in a fixed connection mode, for example, welding. The connection in a fixed connection mode can improve the connection strength between the heat pipe 15 and the cold plate 14 and ensure the stability of the heat pipe 15 during operation. Of course, according to the design needs, the cold plate 14 and the heat pipe 15 can also be connected in a detachable manner. The connection in a detachable manner can facilitate the installation and disassembly of the heat pipe 15 and facilitate the later maintenance.

[0059] The number of the heat pipe 15 can be one or multiple. When the number of the heat pipe 15 is multiple, the multiple heat pipes 15 are installed side by side on the cold plate 14, thereby improving the heat exchange efficiency between the compressor 20 and the refrigerant.

[0060] The above technical scheme has the advantages of simple structure and easy implementation.

[0061] In an embodiment of the present application, the liquid cooling cavity 10 is further provided with a second outlet for discharging liquid refrigerant. The second outlet is provided with a fourth throttling element 13 for adjusting the opening degree according to the detection result of the pressure detection element 16, so that the refrigerant in the liquid cooling cavity 10 is in a saturated state.

[0062] Specifically, the liquid cooling cavity 10 is further provided with a second outlet for discharging liquid refrigerant. The second outlet is provided with a fourth throttling element 13, which has the same structure as the first throttling element 21 and has the same advantages and properties, which will not be described here. The fourth throttling element 13 can adjust its opening degree according to the detection result of the pressure detection element 16, so that the refrigerant in the liquid cooling cavity 10 is in a preset saturated temperature.

[0063] The above technical scheme has the advantages of simple structure and easy implementation.

[0064] In an embodiment of the present application, the height of the inlet is lower than the height of the second outlet, and the height of the second outlet is lower than the height of the first outlet.

[0065] Specifically, the height of the inlet of the liquid cooling cavity 10 is lower than the height of the second outlet, and the height of the second outlet is lower than the height of the first outlet.

[0066] As can be seen from the above, the inlet of the refrigerant is the lowest, so that the liquid refrigerant can stably enter the liquid cooling cavity 10. The second outlet is used for discharging the liquid refrigerant, and the height of the second outlet is higher than that of the inlet of the liquid cooling cavity 10, so as to avoid that the liquid refrigerant in the liquid cooling cavity 10 is completely discharged. The height of the first outlet is higher than that of the second outlet, so as to ensure that the refrigerant discharged from the first outlet is always gaseous refrigerant. Thus, the safety of the entire cooling system is ensured, and the stability and safety of the compressor 20 during operation are improved.

[0067] By using the above technical scheme, the structure is simple and easy to implement.

[0068] In an embodiment of the present application, the liquid cooling cavity 10 further comprises a liquid level detection member 17 for detecting the liquid level.

[0069] Specifically, the liquid cooling cavity 10 further comprises a liquid level detection member 17, which is used to detect the height of the liquid refrigerant in the liquid cooling cavity 10, so as to control the second throttling element 11 and the fourth throttling element 13. Thus, the safety and stability of the cooling system are improved.

[0070] The present application further discloses a control method of a cooling system, comprising the following steps:

[0071] obtaining the pressure value in the liquid cooling cavity 10;

[0072] determining whether the pressure value in the liquid cooling cavity 10 is equal to a preset value;

[0073] when the pressure value is not equal to the preset value, determining whether the pressure value is greater than the preset value;

[0074] when the pressure value is greater than the preset value, reducing the opening degree of the second throttling element 11 and increasing the opening degrees of the third throttling element 12 and the fourth throttling element 13.

[0075] Specifically, the control method of the cooling system comprises the following steps:

[0076] firstly, obtaining the pressure value in the liquid cooling cavity 10, and then determining whether the pressure value in the liquid cooling cavity 10 is equal to a preset value, wherein the preset value refers to the pressure value corresponding to the preset saturated temperature of the refrigerant.

[0077] When the pressure value in the liquid cooling cavity 10 is not equal to the preset value, it indicates that the current pressure in the liquid cooling cavity 10 is abnormal. At this time, it is judged whether the pressure value in the liquid cooling cavity 10 is greater than the preset value. When the pressure value in the liquid cooling cavity 10 is greater than the preset value, it indicates that the current pressure in the liquid cooling cavity 10 is too high. At this time, the opening of the second throttling element 11 is correspondingly reduced, and the openings of the third throttling element 12 and the fourth throttling element 13 are increased, so that the pressure in the liquid cooling cavity 10 is reduced, so that the pressure in the liquid cooling cavity 10 is equal to the preset value.

[0078] By adopting the technical scheme, the process is simple and easy to implement.

[0079] In an embodiment of the present application, when the pressure value is less than the preset value, the opening of the second throttling element 11 is increased, and the openings of the third throttling element 12 and the fourth throttling element 13 are reduced.

[0080] Specifically, when the pressure value in the liquid cooling cavity 10 is less than the preset value, it indicates that the pressure in the liquid cooling cavity 10 is too low. At this time, the opening of the second throttling element 11 is correspondingly increased, so that more liquid coolant enters the liquid cooling cavity 10. And the openings of the third throttling element 12 and the fourth throttling element 13 are reduced, so that the pressure in the liquid cooling cavity 10 is increased, so that the pressure in the liquid cooling cavity 10 is equal to the preset value. It can be thought that when the pressure value in the liquid cooling cavity 10 is equal to the preset value, the openings of the second throttling element 11, the third throttling element 12, and the fourth throttling element 13 are maintained.

[0081] By adopting the technical scheme, the process is simple and easy to implement.

[0082] In an embodiment of the present application, it further comprises:

[0083] Obtaining the liquid level height in the liquid cooling cavity 10;

[0084] Judging whether the liquid level height is greater than a first preset threshold. When the liquid level height is greater than the first preset threshold, the opening of the second throttling element 11 is reduced, and the opening of the fourth throttling element 13 is increased.

[0085] Specifically, it further comprises obtaining the liquid level height in the liquid cooling cavity 10;

[0086] Judging whether the liquid level height is greater than a first preset threshold. When the liquid level height is greater than the first preset threshold, it indicates that the current liquid level in the liquid cooling cavity 10 is high. At this time, the opening of the second throttling element 11 is reduced, and the opening of the fourth throttling element 13 is increased. Correspondingly, when the opening of the second throttling element 11 is reduced and the opening of the fourth throttling element 13 is increased, the liquid level of the liquid coolant in the liquid cooling cavity 10 will be reduced. Thus, the liquid coolant in the liquid cooling cavity 10 returns to the preset state.

[0087] In one embodiment of the present application, when the liquid level height is less than the first preset threshold, it is determined whether the liquid level height is less than the second preset threshold. When the liquid level height is less than the second preset threshold, the opening of the second throttling element 11 is increased and the opening of the fourth throttling element 13 is reduced.

[0088] Specifically, when the liquid level is less than a first preset threshold, a further determination is made as to whether the liquid level is less than a second preset threshold. If the liquid level is less than the second preset threshold, this indicates that the liquid refrigerant level in the liquid cooling chamber 10 is low. In this case, the opening of the second throttling element 11 is increased, and the opening of the fourth throttling element 13 is decreased, to raise the liquid refrigerant level in the liquid cooling chamber 10, thereby restoring the liquid refrigerant in the liquid cooling chamber 10 to a preset state. In this application, the liquid refrigerant level is between the first preset threshold and the second preset threshold.

[0089] Adopting the above technical solution, the process is simple and easy to implement.

[0090] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cooling system comprising an indoor heat exchanger, a compressor, an outdoor heat exchanger, and a first throttling element connected in sequence by pipelines, characterized in that: The heat exchanger is connected to the indoor heat exchanger to discharge the gaseous refrigerant after heat exchange; the liquid cooling chamber is provided with a pressure detection component for detecting the refrigerant pressure in the liquid cooling chamber, the inlet of the liquid cooling chamber is provided with a second throttling element, the first outlet of the liquid cooling chamber is provided with a third throttling element, the second throttling element and the third throttling element can adjust the opening according to the detection result of the pressure detection component so that the refrigerant in the liquid cooling chamber is at a preset saturation temperature; the liquid cooling chamber is also provided with a second outlet for exporting the liquid refrigerant, and the second outlet is provided with a fourth throttling element for adjusting the opening according to the detection result of the pressure detection component so that the refrigerant in the liquid cooling chamber is in a saturated state.

2. The cooling system according to claim 1, wherein: Also includes: A heat pipe is connected to the compressor and is located in the liquid cooling chamber, and is used to conduct heat generated by the compressor and then exchange heat with the refrigerant in the liquid cooling chamber.

3. The cooling system according to claim 2, wherein: Also includes: The cold plate is arranged between the compressor and the heat pipe and is used to fix the heat pipe.

4. The cooling system according to claim 1, wherein: The level of the inlet is smaller than that of the second outlet, and the level of the second outlet is smaller than that of the first outlet.

5. The cooling system according to claim 1, wherein: A liquid level detection component for detecting the liquid level is also provided in the liquid cooling chamber.

6. A method for controlling a cooling system, used in the cooling system according to any one of claims 1 to 5, characterized in that: The control method comprises the following steps: Obtain the pressure value in the liquid cooling chamber; Determining whether the pressure value of the liquid cooling chamber is equal to a preset value; When the pressure value is not equal to the preset value, determining whether the pressure value is greater than the preset value; When the pressure value is greater than a preset value, the opening of the second throttling element is reduced, and the openings of the third throttling element and the fourth throttling element are increased.

7. The cooling system control method according to claim 6, wherein: When the pressure value is less than a preset value, the opening of the second throttling element is increased, and the openings of the third throttling element and the fourth throttling element are decreased.

8. The method for controlling a cooling system according to claim 6, wherein: Also includes: Obtaining the liquid level in the liquid cooling chamber; It is determined whether the liquid level is greater than a first preset threshold value. When the liquid level is greater than the first preset threshold value, the opening of the second throttling element is reduced, and the opening of the fourth throttling element is increased.

9. The cooling system control method according to claim 8, wherein: When the liquid level height is less than the first preset threshold, it is determined whether the liquid level height is less than the second preset threshold. When the liquid level height is less than the second preset threshold, the opening of the second throttling element is increased and the opening of the fourth throttling element is decreased.

10. An air conditioning unit, characterized in that: A cooling system according to any one of claims 1 to 5 is used.

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