CN115175514A

CN115175514A - Cooling system and control method of cooling system

Info

Publication number: CN115175514A
Application number: CN202110374266.2A
Authority: CN
Inventors: 苏国琰; 王芳; 林华和; 汪琦玮
Original assignee: Vertiv Tech Co Ltd
Current assignee: Vertiv Tech Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-10-11

Abstract

The invention provides a cooling system and a control method of the cooling system, wherein the cooling system comprises: the liquid cooling device is provided with a liquid cooling cavity, a liquid cooling inlet and a liquid cooling outlet, and the liquid cooling inlet and the liquid cooling outlet are respectively communicated with the liquid cooling cavity; the circulating pipeline is provided with a circulating pump and a control assembly, liquid cooling media are arranged in the circulating pipeline, and the circulating pipeline is respectively communicated with the liquid cooling inlet and the liquid cooling outlet; the natural cooling unit is arranged on the circulating pipeline and cools the liquid cooling medium through air cooling; the heat exchange unit is arranged on the circulating pipeline and is provided with a compressor, a condenser and a throttle valve which are communicated in sequence; wherein, circulation line passes through control assembly optionally and natural cooling unit and/or heat transfer unit intercommunication to cool off liquid cooling medium. Through the technical scheme provided by the application, the problem that a cooling system in the prior art cannot meet the cooling requirement can be solved.

Description

Cooling system and control method of cooling system

Technical Field

The invention relates to the technical field of electronic equipment cooling, in particular to a cooling system and a control method of the cooling system.

Background

The safe operation of servers relies on good air conditioning cooling systems, and data centers have experienced a quantitative progression from small to large, from decentralized to centralized, since the last 70 s. The cooling mode of the air conditioner of the data center always adopts the traditional air cooling or water cooling, and the air conditioner of the air cooling machine room and the water cooling machine room is only suitable for the conventional data center with low heating density.

Disclosure of Invention

The invention provides a cooling system and a control method of the cooling system, which aim to solve the problem that the cooling system in the prior art cannot meet the cooling requirement.

According to an aspect of the present invention, there is provided a cooling system including: the liquid cooling device is provided with a liquid cooling cavity, a liquid cooling inlet and a liquid cooling outlet, and the liquid cooling inlet and the liquid cooling outlet are respectively communicated with the liquid cooling cavity; the circulating pipeline is provided with a circulating pump and a control assembly, a liquid cooling medium is arranged in the circulating pipeline, and the circulating pipeline is respectively communicated with the liquid cooling inlet and the liquid cooling outlet; the natural cooling unit is arranged on the circulating pipeline and cools the liquid cooling medium through air cooling; the heat exchange unit is arranged on the circulating pipeline and is provided with a compressor, a condenser and a throttle valve which are communicated in sequence; the circulating pipeline is selectively communicated with the natural cooling unit and/or the heat exchange unit through the control assembly so as to cool the liquid cooling medium.

Further, the heat exchange unit also comprises a first heat exchanger, the first heat exchanger is provided with a first low-temperature side and a first high-temperature side which exchange heat with each other, the first low-temperature side is communicated with the compressor and the throttle valve respectively, and the first high-temperature side is communicated with the circulating pipeline.

Further, the natural cooling unit includes an air-cooled heat exchanger provided on the circulation line.

Furthermore, the natural cooling unit further comprises a first liquid cooling pump and a second heat exchanger, the second heat exchanger is provided with a second low-temperature side and a second high-temperature side which exchange heat with each other, the second low-temperature side, the air cooling heat exchanger and the first liquid cooling pump are communicated end to end in sequence, and the second high-temperature side is communicated with the circulating pipeline.

Further, circulation pipeline includes inlet line and outlet pipeline, and the circulating pump setting is on outlet pipeline, and inlet line's one end and the import intercommunication of liquid cooling, outlet pipeline's one end and liquid cooling export intercommunication, natural cooling unit are located the upper reaches of first heat exchanger, the export of first high temperature side and inlet pipeline's the other end intercommunication, the import and the export of second high temperature side along fluid flow direction in order with outlet pipeline intercommunication, control assembly includes: the first reversing valve is arranged on the outlet pipeline, a first interface of the first reversing valve is communicated with the liquid cooling outlet, and a second interface of the first reversing valve is communicated with an inlet on the second high-temperature side; the second reversing valve is arranged on the outlet pipeline, a first connector of the second reversing valve is communicated with a third connector of the first reversing valve, the position of the outlet on the second high-temperature side communicated with the outlet pipeline is positioned between the first reversing valve and the second reversing valve, a second connector of the second reversing valve is communicated with the inlet on the first high-temperature side, and a third connector of the second reversing valve is communicated with the outlet on the first high-temperature side.

Further, the heat exchange unit further comprises a second liquid cooling pump, an inlet and an outlet of the second liquid cooling pump are respectively connected with an outlet of the condenser and an inlet of the throttling valve, the cooling system further comprises a first bypass, a second bypass and a third bypass, the first bypass is respectively communicated with an inlet and an outlet of the compressor, the second bypass is respectively communicated with an inlet and an outlet of the second liquid cooling pump, the third bypass is respectively communicated with an inlet and an outlet of the throttling valve, and the first bypass, the second bypass and the third bypass are respectively provided with a one-way valve.

Further, circulation pipeline includes inlet pipeline and outlet pipeline, and the circulating pump setting is on outlet pipeline, and inlet pipeline's one end and liquid cooling import intercommunication, outlet pipeline's one end and liquid cooling export intercommunication, and the natural cooling unit is located the upper reaches of first heat exchanger, and inlet pipeline's the other end and the export intercommunication of first high temperature side, the import and the export of air-cooled heat exchanger along fluid flow direction in order with outlet pipeline intercommunication, control assembly includes: the third reversing valve is arranged on the outlet pipeline, a first interface of the third reversing valve is communicated with the liquid cooling outlet, and a second interface of the third reversing valve is communicated with the inlet of the air-cooled heat exchanger; and the fourth reversing valve is arranged on the outlet pipeline, a first interface of the fourth reversing valve is communicated with a third interface of the third reversing valve, the communication position of the outlet of the air-cooled heat exchanger and the outlet pipeline is positioned between the third reversing valve and the fourth reversing valve, a second interface of the fourth reversing valve is communicated with the inlet of the first high-temperature side, and a third interface of the fourth reversing valve is communicated with the outlet of the first high-temperature side.

Furtherly, circulation pipeline includes inlet pipeline and outlet pipeline, and the circulating pump setting is on the outlet pipeline, and inlet pipeline's one end and liquid cooling import intercommunication, inlet pipeline's the other end and the export intercommunication of first high temperature side, outlet pipeline's one end and liquid cooling export intercommunication, outlet pipeline's the other end and the import intercommunication of forced air cooling heat exchanger, control assembly includes: and the fifth reversing valve is communicated with the outlet of the air-cooled heat exchanger, the inlet of the first high-temperature side and the outlet of the first high-temperature side respectively.

Further, the cooling system also comprises a spraying assembly which can cool the air-cooled heat exchanger and/or the condenser.

Further, the cooling system further comprises a fan, wherein: the fan cools the air-cooled heat exchanger; or, the fan cools the condenser; or the fan cools the air-cooled heat exchanger and the condenser at the same time, the air-cooled heat exchanger is positioned on the air inlet side of the fan, and the condenser is positioned on the air outlet side of the air-cooled heat exchanger.

Further, the cooling system includes a plurality of liquid cooling devices disposed in parallel with each other.

According to another aspect of the present invention, there is provided a control method of a cooling system, a control method of a cooling system using the cooling system provided above, the control method including: acquiring the ambient temperature and the temperature in a liquid cooling cavity in a cooling system; respectively calculating according to the temperature in the liquid cooling cavity to obtain a first preset temperature and a second preset temperature, wherein the first preset temperature is lower than the second preset temperature; determining a target refrigeration mode according to the relation between the ambient temperature and the first preset temperature and the second preset temperature; and controlling the cooling system to refrigerate according to the target refrigeration mode.

Further, determining a target cooling mode according to a relationship between the ambient temperature and the first preset temperature and the second preset temperature includes: when the ambient temperature is less than or equal to a first preset temperature, taking the natural cooling mode as a target refrigeration mode; when the ambient temperature is higher than the first preset temperature and is lower than or equal to the second preset temperature, taking the mixed cold mode as a target refrigeration mode; and when the ambient temperature is higher than the second preset temperature, taking the compressor refrigeration mode as a target refrigeration mode.

Further, if the target cooling mode is the natural cooling mode, controlling the cooling system to cool according to the target cooling mode includes: sequentially opening a third interface of a second reversing valve, a circulating pump, a fan and a first liquid-cooling pump in the cooling system to cool the liquid-cooling medium; wherein the third port of the first reversing valve remains closed; or the check valve of the first bypass, the check valve of the third bypass, the circulating pump, the fan and the second liquid cooling pump in the cooling system are sequentially opened to cool the liquid cooling medium, wherein the check valve of the second bypass is kept closed; or the one-way valve of the first bypass, the one-way valve of the third bypass, the circulating pump, the fan, the first liquid cooling pump and the second liquid cooling pump in the cooling system are sequentially opened to cool the liquid cooling medium; the third port of the first reversing valve, the third port of the second reversing valve and the one-way valve of the second bypass are kept closed; or a third interface of a fourth reversing valve in the cooling system, a circulating pump and a fan are sequentially opened to cool the liquid cooling medium; wherein the third port of the third directional valve remains closed; or sequentially opening a fifth reversing valve in the cooling system, a circulating pump and a fan which are communicated with the outlet of the first high-temperature side so as to cool the liquid cooling medium; and the interface of the fifth reversing valve communicated with the inlet of the first high-temperature side is kept closed.

Further, if the target refrigeration mode is a mixed cooling mode, controlling the cooling system to perform refrigeration according to the target refrigeration mode includes: sequentially opening a circulating pump, a fan, a first liquid cooling pump and a compressor in a cooling system to cool a liquid cooling medium; the third port of the first reversing valve and the third port of the second reversing valve are kept closed; or, opening the one-way valve, the circulating pump, the fan, the first liquid cooling pump and the compressor of the second bypass in the cooling system in sequence to cool the liquid cooling medium; the third port of the first reversing valve, the third port of the second reversing valve, the check valve of the first bypass and the check valve of the third bypass are kept closed; or a circulating pump, a fan and a compressor in the cooling system are sequentially started to cool the liquid cooling medium; the third port of the third reversing valve and the third port of the fourth reversing valve are kept closed; or sequentially opening a port, a circulating pump, a fan and a compressor which are communicated with the inlet of the first high-temperature side through a fifth reversing valve in the cooling system so as to cool the liquid cooling medium; and the interface of the fifth reversing valve communicated with the outlet of the first high-temperature side is kept closed.

Further, if the target refrigeration mode is a compressor refrigeration mode, controlling the cooling system to perform refrigeration according to the target refrigeration mode includes: sequentially opening a third interface of a first reversing valve, a circulating pump, a fan and a compressor in the cooling system to cool the liquid cooling medium; wherein the third port of the second reversing valve remains closed; or the one-way valve, the circulating pump, the fan and the compressor of the second bypass in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the check valve of the first bypass and the check valve of the third bypass are both kept closed; or sequentially opening a third interface of the first reversing valve, a one-way valve of the second bypass, a circulating pump, a fan and a compressor in the cooling system to cool the liquid cooling medium; the third interface of the second reversing valve, the one-way valve of the first bypass and the one-way valve of the third bypass are kept closed; sequentially opening a third interface of a third reversing valve, a circulating pump, a fan and a compressor in the cooling system to cool the liquid cooling medium; wherein the third port of the fourth directional valve remains closed.

Further, after the cooling system is controlled to perform cooling according to the target cooling mode, the control method further includes: acquiring a preset stop temperature; and when the temperature in the liquid cooling cavity is lower than the preset stop temperature, controlling the cooling system to stop refrigerating.

Further, if the target cooling mode is a natural cooling mode, controlling the cooling system to stop cooling includes: closing a first liquid cooling pump, a fan, a circulating pump and a third interface of a second reversing valve in the cooling system in sequence; or closing a second liquid cooling pump, a fan, a circulating pump, a one-way valve of a third bypass and a one-way valve of a first bypass in the cooling system in sequence; or closing a second liquid-cooled pump, a first liquid-cooled pump, a fan, a circulating pump, a check valve of a third bypass and a check valve of a first bypass in the cooling system in sequence; or the fan, the circulating pump and the third interface of the fourth reversing valve in the cooling system are closed in sequence; or the fan, the circulating pump and the interface of the fifth reversing valve in the cooling system, which is communicated with the outlet of the first high-temperature side, are closed in sequence.

Further, if the target cooling mode is a mixed cooling mode, controlling the cooling system to stop cooling comprises: sequentially closing a compressor, a first liquid-cooling pump, a fan and a circulating pump in the cooling system; or the compressor, the first liquid-cooling pump, the fan, the circulating pump and the one-way valve of the second bypass in the cooling system are closed in sequence; or the compressor, the fan and the circulating pump in the cooling system are closed in sequence; or the compressor, the fan, the circulating pump and the fifth reversing valve in the cooling system are closed in sequence, and the interfaces communicated with the inlet of the first high-temperature side are closed.

Further, if the target cooling mode is a compressor cooling mode, controlling the cooling system to stop cooling includes: closing a compressor, a fan, a circulating pump and a third interface of the first reversing valve in the cooling system in sequence; or closing a compressor, a fan, a circulating pump and a one-way valve of a second bypass in the cooling system in sequence; or closing a compressor, a fan, a circulating pump, a one-way valve of a second bypass and a third interface of the first reversing valve in the cooling system in sequence; or the compressor, the fan, the circulating pump and the third interface of the third reversing valve in the cooling system are closed in sequence.

Further, calculate respectively according to the temperature in the liquid cooling intracavity and obtain first preset temperature and second preset temperature, include: acquiring a preset natural cold temperature difference and a preset mixed cold temperature difference; calculating to obtain a first preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset natural cold temperature difference; and calculating to obtain a second preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset mixed cold temperature difference.

Further, the acquiring the preset stop temperature includes: acquiring the set temperature of the liquid cooling cavity and the start-stop deviation temperature of the cooling system; and calculating to obtain a preset stop temperature according to the difference value of the set temperature in the liquid cooling cavity and the start-stop deviation temperature.

Further, controlling the cooling system to perform cooling according to the target cooling mode includes: acquiring dry bulb temperature and wet bulb temperature in an outdoor environment; and when the difference value between the dry bulb temperature and the wet bulb temperature is greater than a first set value and the dry bulb temperature is greater than a second set value, starting a spraying assembly in the cooling system for spraying.

By applying the technical scheme of the invention, the cooling system comprises the liquid cooling device, the circulating pipeline, the natural cooling unit and the heat exchange unit, wherein the liquid cooling device can be used for placing other electronic equipment such as a server and the like so as to cool the server through a liquid cooling medium. The control assembly is arranged in the application, so that the liquid cooling medium can be selectively cooled by the natural cooling unit and/or the heat exchange unit through the control assembly. Therefore, the server can be cooled through the natural cooling unit under low load, and cooled through the heat exchange unit or cooled through the natural cooling unit and the heat exchange unit together under high load, so as to meet different cooling requirements. The heat exchange unit comprising the compressor, the condenser and the throttle valve is used for cooling, so that the overall cooling performance of the device can be improved, and the cooling requirement of a high-temperature server is met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram illustrating a cooling system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram illustrating a cooling system according to a second embodiment of the present invention;

FIG. 3 is a schematic structural diagram illustrating a cooling system according to a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram illustrating a cooling system according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram illustrating a cooling system according to a fifth embodiment of the present invention;

FIG. 6 is a schematic structural diagram illustrating a cooling system according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural diagram illustrating a cooling system according to a seventh embodiment of the present invention;

fig. 8 shows a flow chart of a cooling system control method provided according to the present invention.

Wherein the figures include the following reference numerals:

10. a liquid cooling device;

20. a natural cooling unit; 21. an air-cooled heat exchanger; 22. a first liquid-cooled pump; 23. a second heat exchanger; 24. a second liquid-cooled pump;

30. a heat exchange unit; 31. a compressor; 32. a condenser; 33. a throttle valve; 34. a first heat exchanger;

41. an inlet line; 42. an outlet line; 43. a circulation pump;

51. a first direction changing valve; 511. a first port of the first reversing valve; 512. a second port of the first reversing valve; 513. a third port of the first reversing valve;

52. a second directional control valve; 521. a first port of a second reversing valve; 522. a second port of the second reversing valve; 523. a third port of the second reversing valve;

53. a third directional control valve; 531. a first port of a third reversing valve; 532. a second port of the third reversing valve; 533. a third port of a third reversing valve;

54. a fourth directional control valve; 541. a first port of a fourth reversing valve; 542. a second port of the fourth reversing valve; 543. a third port of a fourth reversing valve;

55. a fifth directional control valve;

60. a one-way valve; 71. a spray pump; 72. a spray head; 73. a water tank; 80. a fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, according to an embodiment of the present application, there is provided a cooling system, including: liquid cooling device 10, circulation line, natural cooling unit 20 and heat exchange unit 30. The liquid cooling device 10 has a liquid cooling chamber, a liquid cooling inlet and a liquid cooling outlet, which are respectively communicated with the liquid cooling chamber. Specifically, the liquid cooling device 10 is an open container provided with a top cover, liquid cooling medium is filled in the open container, and the server can be completely immersed in the liquid cooling medium to cool the open container through the liquid cooling medium. The circulating pipeline is provided with a circulating pump 43 and a control assembly, liquid cooling media are arranged in the circulating pipeline, the circulating pipeline is communicated with the liquid cooling inlet and the liquid cooling outlet respectively, and the circulating pump 43 provides power for the circulating flow of the liquid cooling media. Wherein the liquid cooling medium is a single phase insulating cooling liquid, which includes but is not limited to freon. The natural cooling unit 20 is disposed on the circulation pipeline, and the natural cooling unit 20 cools the liquid cooling medium through air cooling. The heat exchange unit 30 is disposed on the circulation pipeline, the heat exchange unit 30 has a compressor 31, a condenser 32, and a throttle 33, which are sequentially connected, and the heat exchange unit 30 cools and cools the liquid cooling medium through a cooling system formed by the compressor 31, the condenser 32, and the throttle 33. Wherein, the circulating pipeline is selectively communicated with the natural cooling unit 20 and/or the heat exchange unit 30 through the control assembly so as to cool the liquid cooling medium. That is, in this application, the liquid cooling medium can be cooled by the natural cooling unit 20, and also can be cooled by the heat exchanging unit 30, and also can be cooled by the cooperation of the natural cooling unit 20 and the heat exchanging unit 30.

The cooling system comprises a liquid cooling device 10, a circulating pipeline, a natural cooling unit 20 and a heat exchange unit 30, wherein the liquid cooling device 10 can be used for placing other electronic equipment such as a server and the like so as to cool the server through a liquid cooling medium. The control assembly is arranged in the application, so that the liquid cooling medium can be selectively cooled through the natural cooling unit 20 and/or the heat exchange unit 30 by the control assembly, the liquid cooling medium can be cooled through the natural cooling unit 20 when the server is in low load, and the liquid cooling medium can be cooled through the heat exchange unit 30 or cooled through the natural cooling unit 20 and the heat exchange unit 30 together when the server is in high load, so that different cooling requirements can be met. The cooling is performed by the heat exchange unit including the compressor 31, the condenser 32, and the throttle valve 33, which can improve the cooling performance of the entire system and satisfy the cooling demand of the high-temperature server.

Particularly, in the application, the natural cooling unit 20 can be used for providing a main cold source for the liquid cooling medium, and the heat exchange unit 30 is used for cooling under the condition that the temperature of the server is higher, so that the cooling requirement can be met, and the energy-saving effect can be achieved.

The heat exchange unit 30 further includes a first heat exchanger 34, the first heat exchanger 34 has a first low temperature side and a first high temperature side for exchanging heat with each other, the first low temperature side is respectively communicated with the compressor 31 and the throttle valve 33, and the first high temperature side is communicated with the circulation pipeline. Therefore, the first low-temperature side, the compressor 31, the condenser 32 and the throttle valve 33 can form a refrigeration cycle loop, and then the first low-temperature side and the first high-temperature side are utilized for heat exchange so as to cool the liquid cooling medium in the first high-temperature side. The above structure makes the heat exchange unit 30 relatively independent from the circulation line, and facilitates independent installation and control.

In the present application, the natural cooling unit 20 includes an air-cooled heat exchanger 21, and the air-cooled heat exchanger 21 is provided on the circulation line. The liquid cooling medium in the air-cooled heat exchanger 21 can be cooled by natural wind.

In this embodiment, the fans 80 are disposed at the air-cooled heat exchanger 21 and the condenser 32, so that the air-cooled heat exchanger 21 and the condenser 32 are cooled and cooled by the fans 80.

Specifically, the natural cooling unit 20 further includes a first liquid-cooled pump 22 and a second heat exchanger 23, the second heat exchanger 23 has a second low-temperature side and a second high-temperature side which exchange heat with each other, the second low-temperature side, the air-cooled heat exchanger 21 and the first liquid-cooled pump 22 are sequentially communicated end to end, and the second high-temperature side is communicated with the circulation pipeline. Through the structure, utilize air-cooled heat exchanger 21, first liquid cooling pump 22, the refrigeration cycle return circuit is constituteed to the second low temperature side, provide power to this refrigeration cycle return circuit through first liquid cooling pump 22, utilize the second low temperature side to cool off the second high temperature side, it can make natural cooling unit 20 and circulation pipeline relatively independent to set up like this, be convenient for set up and install natural cooling unit 20, make this natural cooling unit 20 still can cool off for the liquid cooling medium in the circulation pipeline when far away with liquid cooling device 10 distance.

In this embodiment, the circulation line includes an inlet line 41 and an outlet line 42, the circulation pump 43 is disposed on the outlet line 42, one end of the inlet line 41 communicates with the liquid cooling inlet, and one end of the outlet line 42 communicates with the liquid cooling outlet. The free cooling unit 20 is located upstream of the first heat exchanger 34, the outlet of the first high temperature side is in communication with the other end of the inlet conduit 41, the inlet and outlet of the second high temperature side are in fluid flow communication in series with the outlet conduit 42, and the control assembly comprises a first reversing valve 51 and a second reversing valve 52. The first reversing valve 51 and the second reversing valve 52 are both arranged on the outlet pipeline 42, the first interface 511 of the first reversing valve is communicated with the liquid cooling outlet, the second interface 512 of the first reversing valve is communicated with the inlet of the second high-temperature side, the first interface 521 of the second reversing valve is communicated with the third interface 513 of the first reversing valve, the communication position of the outlet of the second high-temperature side and the outlet pipeline 42 is positioned between the first reversing valve 51 and the second reversing valve 52, the second interface 522 of the second reversing valve is communicated with the inlet of the first high-temperature side, and the third interface 523 of the second reversing valve is communicated with the outlet of the first high-temperature side.

Through the structure, the first reversing valve 51 and the second reversing valve 52 can be used for controlling the circulating pipeline, so that the liquid cooling medium in the circulating pipeline can be cooled by the natural cooling unit 20, the heat exchange unit 30 or both the natural cooling unit 20 and the heat exchange unit 30. Its simple structure of above-mentioned scheme can satisfy multiple cooling requirement to can play the effect of energy can be saved.

As shown in fig. 2, the cooling system provided in the second embodiment of the present application is different from the first embodiment in that the air-cooled heat exchanger 21 and the condenser 32 can be placed together, so that the air-cooled heat exchanger 21 and the condenser 32 can be cooled by the fan 80 at the same time. The arrangement can save system parts and achieve the purpose of saving the whole occupied space. Specifically, the air-cooled heat exchanger 21 may be disposed on the air intake side of the fan 80, and the condenser 32 may be disposed on the air outlet side of the air-cooled heat exchanger 21.

As shown in fig. 3, a third embodiment of the present application provides a cooling system, in this embodiment, the heat exchange unit 30 further includes a second liquid-cooled pump 24, an inlet and an outlet of the second liquid-cooled pump 24 are respectively connected to an outlet of the condenser 32 and an inlet of the throttle valve 33, the cooling system further includes a first bypass, a second bypass, and a third bypass, the first bypass is respectively communicated with an inlet and an outlet of the compressor 31, the second bypass is respectively communicated with an inlet and an outlet of the second liquid-cooled pump 24, the third bypass is respectively communicated with an inlet and an outlet of the throttle valve 33, and the first bypass, the second bypass, and the third bypass are respectively provided with a check valve 60. Through the structure, the natural cooling unit 20 and the heat exchange unit 30 are combined together by arranging the bypass and the check valve 60, when the air cooling mode is required for cooling, the check valve of the first bypass can be opened, the check valve of the second bypass can be closed, and the check valve of the third bypass can be opened, so that the natural cooling unit 20 is formed by the first low-temperature side, the first bypass, the condenser 32, the second liquid-cooled pump 24 and the third bypass; when the heat exchange unit 30 is required to be cooled, the first bypass check valve may be closed, the second bypass check valve may be opened, and the third bypass check valve may be closed, so that the liquid cooling medium can form a cooling loop through the compressor 31, the condenser 32, the throttle 33, and the first low temperature side in this order. The structure of the system can be further simplified through the structure, the pipeline connection in the system is greatly reduced, and the occupied space of the system is reduced.

In addition, in this embodiment, a spraying assembly may be further disposed at the condenser 32, so as to cool the condenser 32 by cooling through the spraying assembly, so as to further improve the cooling performance.

Specifically, the spray assembly comprises a water tank 73, a spray pump 71 and a spray head 72, wherein the spray head 72 is connected with the spray pump 71 through a main pipe, water in the water tank 73 is conveyed into the spray head 72 through the spray pump 71 and is sprayed onto the condenser 32 from top to bottom, an evaporative cooling effect is formed, the cooling effect is enhanced, and non-evaporated water drops can be collected into the water tank 73 again.

As shown in fig. 4, the fourth embodiment of the present application provides a cooling system, which is different from the third embodiment in that a set of natural cooling unit 20 formed by an air-cooled heat exchanger 21, a first liquid-cooled pump 22 and a second heat exchanger 23 is added on a circulation pipeline on the basis of the third embodiment, and a first direction changing valve 51 and a second direction changing valve 52 are also added. Specifically, the first direction valve 51 and the second direction valve 52 are both arranged on the outlet pipeline 42, the first interface 511 of the first direction valve is communicated with the liquid cooling outlet, the second interface 512 of the first direction valve is communicated with the inlet of the second high temperature side, the first interface 521 of the second direction valve is communicated with the third interface 513 of the first direction valve, the communication position of the outlet of the second high temperature side and the outlet pipeline 42 is located between the first direction valve 51 and the second direction valve 52, the second interface 522 of the second direction valve is communicated with the inlet of the first high temperature side, and the third interface 523 of the second direction valve is communicated with the outlet of the first high temperature side.

With the above configuration, the cooling system can be provided with the following cooling modes: 1. refrigerating the liquid cooling medium of the circulating pipeline by using a second heat exchanger 23; 2. refrigerating the liquid cooling medium of the circulating pipeline by using the first heat exchanger 34; 3. the liquid cooling medium of the circulation line is simultaneously cooled by the first heat exchanger 34 and the second heat exchanger 23. When the first heat exchanger 34 is used for cooling, the liquid cooling medium in the circulation pipeline can be selectively cooled by the heat exchange unit 30 formed by the compressor 31, or the liquid cooling medium in the circulation pipeline can be selectively cooled by the air-cooled circulation loop formed by the second liquid cooling pump 24. The cooling mode is more, and the alternative is stronger, makes this system can carry out cooling, cooling to the pertinence under different situations.

As shown in fig. 5, the fifth embodiment of the present application provides a cooling system, which is different from the first embodiment in that the first liquid-cooling pump 22 and the second heat exchanger 23 are not provided in the free cooling unit 20. The circulation pipeline comprises an inlet pipeline 41 and an outlet pipeline 42, one end of the inlet pipeline 41 is communicated with the liquid cooling inlet, one end of the outlet pipeline 42 is communicated with the liquid cooling outlet, the natural cooling unit 20 is located at the upstream of the first heat exchanger 34, the other end of the inlet pipeline 41 is communicated with the outlet of the first high-temperature side, and the inlet and the outlet of the air-cooled heat exchanger 21 are sequentially communicated with the outlet pipeline 42 along the fluid flow direction. The control assembly includes: a third direction changing valve 53 and a fourth direction changing valve 54. The third reversing valve 53 and the fourth reversing valve 54 are both arranged on the outlet pipeline 42, the first interface 531 of the third reversing valve is communicated with the liquid cooling outlet, the second interface 532 of the third reversing valve is communicated with the inlet of the air-cooled heat exchanger 21, the first interface 541 of the fourth reversing valve is communicated with the third interface 533 of the third reversing valve, the communication position of the outlet of the air-cooled heat exchanger 21 and the outlet pipeline 42 is located between the third reversing valve 53 and the fourth reversing valve 54, the second interface 542 of the fourth reversing valve is communicated with the inlet of the first high-temperature side, and the third interface 543 of the fourth reversing valve is communicated with the outlet of the first high-temperature side.

In the above configuration, the first liquid-cooling pump 22 and the second heat exchanger 23 are not provided, and the entire piping is driven by the circulation pump 43 when cooling is performed by the free cooling unit 20. The cooling device is suitable for being used under the condition that the natural cooling unit 20 is close to the liquid cooling device 10, and is simple in structure; the second heat exchanger 23 is not arranged in the structure, and the air cooling heat exchanger 21 is utilized to directly exchange heat for the liquid cooling medium, so that the heat exchange consumption can be reduced, and the refrigerating capacity and the cooling performance are improved.

As shown in fig. 6, the sixth embodiment of the present application provides a cooling system, which is different from the fifth embodiment in that the air-cooled heat exchanger 21 and the condenser 32 are placed together to cool down the air-cooled heat exchanger 21 and the condenser 32 simultaneously by the fan 80. And, in this embodiment, this circulation pipeline includes inlet pipe 41 and outlet pipe 42, circulation pump 43 sets up on outlet pipe 42, the one end and the liquid cooling import intercommunication of inlet pipe 41, the other end and the export intercommunication of first high temperature side of inlet pipe 41, the one end and the liquid cooling export intercommunication of outlet pipe 42, the other end and the import intercommunication of air-cooled heat exchanger 21 of outlet pipe 42, control assembly includes fifth switching-over valve 55, fifth switching-over valve 55 respectively with the export of air-cooled heat exchanger 21, the import of first high temperature side and the export intercommunication of first high temperature side. The system has simple structure, is convenient to set and install, and can complete the switching of air cooling and cooling by using the compressor 31 by arranging a reversing valve.

Specifically, in the present embodiment, the spray assembly is disposed on the air-cooled heat exchanger 21 and the condenser 32 to further improve the cooling effect.

Specifically, the shower head 72 is disposed above the air-cooled heat exchanger 21 and the condenser 32, and the shower pump 71 pumps water to the air-cooled heat exchanger 21 and the condenser 32 to cool them.

As shown in fig. 7, a seventh embodiment of the present application provides a cooling system, which is different from the first embodiment in that the cooling system includes a plurality of liquid cooling devices 10 arranged in parallel to meet the requirement of cooling a plurality of servers.

Through the cooling system that this application provided, can selectively cool off the server through natural cooling unit 20 and heat transfer unit 30, can satisfy and cool off the server under the different temperatures, can play the effect of energy can be saved again, and it can solve the problem of server high heating density, high-power consumption under the new trend, can realize the anhydrous operation of computer lab, guarantees computer lab safety, steady operation.

As shown in fig. 8, another embodiment of the present application provides a control method of a cooling system, which applies the cooling system provided in the above embodiment, and the control method includes:

s801, acquiring the ambient temperature and the temperature in a liquid cooling cavity in a cooling system;

s802, respectively calculating according to the temperature in the liquid cooling cavity to obtain a first preset temperature and a second preset temperature, wherein the first preset temperature is lower than the second preset temperature;

s803, determining a target refrigeration mode according to the relation between the ambient temperature and the first preset temperature and the second preset temperature;

and S804, controlling the cooling system to refrigerate according to the target refrigeration mode.

Through the control method provided by the application, the target refrigeration mode can be determined according to different environmental temperatures, so that the liquid cooling medium is refrigerated through different refrigeration modes, the effects of saving energy and reducing energy consumption can be achieved while the refrigeration effect is guaranteed, and the cooling performance is improved.

Specifically, determining a target refrigeration mode according to a relationship between the ambient temperature and the first preset temperature and the second preset temperature specifically includes:

when the ambient temperature is less than or equal to a first preset temperature, taking the natural cooling mode as a target refrigeration mode; when the ambient temperature is higher than the first preset temperature and is lower than or equal to the second preset temperature, taking the mixed cold mode as a target refrigeration mode; and when the ambient temperature is higher than a second preset temperature, taking the compressor refrigeration mode as a target refrigeration mode.

The mixed cold mode is a natural cold mode and a compressor refrigeration mode for refrigeration together. By the control method, the server can be cooled in a natural cooling mode at low load, and cooled in a compressor refrigeration mode or a mixed cooling mode at high load so as to meet different cooling requirements.

If the target refrigeration mode is a natural refrigeration mode, the cooling system is controlled to refrigerate according to the target refrigeration mode, and different operation modes can be selected according to different system structures, and the method specifically comprises the following steps:

as in the cooling system shown in fig. 1, fig. 2 and fig. 7, the third interface 523 of the second reversing valve, the circulating pump 43, the fan 80 and the first liquid-cooling pump 22 in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the third port 513 of the first directional valve remains closed;

as shown in fig. 3, the check valve of the first bypass, the check valve of the third bypass, the circulation pump 43, the blower 80, and the second liquid-cooling pump 24 in the cooling system are sequentially opened to cool the liquid-cooling medium, wherein the check valve of the second bypass remains closed;

as shown in fig. 4, in the cooling system, the check valve of the first bypass, the check valve of the third bypass, the circulating pump 43, the fan 80, the first liquid-cooling pump 22 and the second liquid-cooling pump 24 in the cooling system are sequentially opened to cool the liquid-cooling medium; the third port 513 of the first reversing valve, the third port 523 of the second reversing valve and the one-way valve of the second bypass are all kept closed;

as shown in fig. 5, in the cooling system, the third interface 543 of the fourth reversing valve, the circulating pump 43 and the fan 80 in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the third port 533 of the third directional valve remains closed;

as shown in fig. 6, in the cooling system, the interface of the fifth reversing valve 55 in the cooling system, which is communicated with the outlet on the first high temperature side, the circulating pump 43 and the fan 80 are sequentially opened to cool the liquid cooling medium; wherein the port of the fifth direction valve 55 communicating with the inlet of the first high temperature side is kept closed.

The normal operation of the system in the natural cooling mode can be ensured by the control mode.

If the target refrigeration mode is a mixed cold mode, the cooling system is controlled to refrigerate according to the target refrigeration mode, and different operation modes can be selected according to different system structures, and the method specifically comprises the following steps:

as shown in fig. 1, fig. 2 and fig. 7, the circulation pump 43, the blower 80, the first liquid-cooling pump 22 and the compressor 31 in the cooling system are sequentially turned on to cool the liquid cooling medium; wherein the third interface 513 of the first direction valve and the third interface 523 of the second direction valve are both kept closed;

as shown in fig. 4, the check valve of the second bypass, the circulating pump 43, the blower 80, the first liquid-cooling pump 22 and the compressor 31 in the cooling system are sequentially opened to cool the liquid-cooling medium; the third interface 513 of the first reversing valve, the third interface 523 of the second reversing valve, the check valve of the first bypass and the check valve of the third bypass are all kept closed;

as shown in fig. 5, the circulation pump 43, the blower 80 and the compressor 31 in the cooling system are sequentially turned on to cool the liquid cooling medium; the third interface 533 of the third direction valve and the third interface 543 of the fourth direction valve are both kept closed;

as shown in fig. 6, in the cooling system, the interface of the fifth reversing valve 55 in the cooling system, which is communicated with the inlet of the first high temperature side, the circulating pump 43, the fan 80 and the compressor 31 are sequentially opened to cool the liquid cooling medium; wherein the port of the fifth direction valve 55 communicating with the outlet of the first high temperature side is kept closed.

The normal operation of the system in the mixed cold mode can be ensured through the control mode.

If the target refrigeration mode is a compressor refrigeration mode, the cooling system is controlled to refrigerate according to the target refrigeration mode, and different operation modes can be selected according to different system structures, and the method specifically comprises the following steps:

as for the cooling system shown in fig. 1, 2 and 7, the third interface 513 of the first reversing valve, the circulating pump 43, the fan 80 and the compressor 31 in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the third port 523 of the second directional valve remains closed;

as shown in fig. 3, the one-way valve of the second bypass, the circulating pump 43, the blower 80 and the compressor 31 in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the check valve of the first bypass and the check valve of the third bypass are both kept closed;

as shown in fig. 4, in the cooling system, the third interface 513 of the first reversing valve, the check valve of the second bypass, the circulating pump 43, the fan 80 and the compressor 31 are sequentially opened to cool the liquid cooling medium; the third interface 523 of the second reversing valve, the check valve of the first bypass and the check valve of the third bypass are all kept closed;

as shown in fig. 5, the third interface 533 of the third reversing valve, the circulating pump 43, the blower 80, and the compressor 31 in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the third interface 543 of the fourth directional valve remains closed.

The normal operation of the system in the compressor refrigeration mode can be ensured through the control mode.

In this embodiment, after controlling the cooling system to perform cooling according to the target cooling mode, the control method further includes: acquiring a preset stop temperature; and when the temperature in the liquid cooling cavity is lower than the preset stop temperature, controlling the cooling system to stop refrigerating. Through the design, the control system can stop working when the temperature of the liquid cooling cavity is lower, so that the energy-saving purpose is achieved.

If the target refrigeration mode is a natural refrigeration mode, the cooling system is controlled to stop refrigeration, and different operation modes can be selected according to different system structures, specifically comprising the following steps:

as in the cooling systems shown in fig. 1, fig. 2 and fig. 7, the first liquid-cooling pump 22, the fan 80, the circulating pump 43 and the third interface 523 of the second reversing valve in the cooling system are sequentially turned off;

as shown in fig. 3, the second liquid-cooled pump 24, the blower 80, the circulating pump 43, the check valve of the third bypass, and the check valve of the first bypass in the cooling system are sequentially closed;

as shown in fig. 4, the second liquid-cooled pump 24, the first liquid-cooled pump 22, the fan 80, the circulating pump 43, the check valve of the third bypass, and the check valve of the first bypass in the cooling system are sequentially closed;

as shown in fig. 5, the blower 80, the circulation pump 43 and the third port 543 of the fourth reversing valve in the cooling system are sequentially closed;

in the cooling system shown in fig. 6, the blower 80, the circulation pump 43, and the fifth direction changing valve 55 in the cooling system are sequentially closed from the connection with the outlet on the first high temperature side.

The control mode can ensure that the system can normally run when being started next time.

If the target refrigeration mode is a mixed cold mode, the cooling system is controlled to stop refrigerating, and different operation modes can be selected according to different system structures, and the method specifically comprises the following steps:

as in the cooling systems shown in fig. 1, 2 and 7, the compressor 31, the first liquid-cooling pump 22, the blower 80 and the circulating pump 43 in the cooling system are sequentially turned off;

as shown in fig. 4, the compressor 31, the first liquid-cooling pump 22, the fan 80, the circulating pump 43 and the check valve of the second bypass in the cooling system are closed in sequence;

as shown in fig. 5, the compressor 31, the blower 80 and the circulation pump 43 in the cooling system are sequentially turned off;

as shown in fig. 6, the interface of the compressor 31, the blower 80, the circulating pump 43, and the fifth direction change valve 55 in the cooling system, which are communicated with the inlet of the first high temperature side, is closed in sequence.

If the target refrigeration mode is a compressor refrigeration mode, the cooling system is controlled to stop refrigeration, and different operation modes can be selected according to different system structures, and the method specifically comprises the following steps:

as in the cooling systems shown in fig. 1, 2 and 7, the compressor 31, the blower 80, the circulation pump 43 and the third port 513 of the first reversing valve in the cooling system are sequentially closed;

as in the cooling system shown in fig. 3, the compressor 31, the blower 80, the circulating pump 43 and the check valve of the second bypass in the cooling system are closed in sequence;

as shown in fig. 4, the compressor 31, the blower 80, the circulating pump 43, the check valve of the second bypass, and the third port 513 of the first reversing valve in the cooling system are sequentially closed;

as shown in fig. 5, the compressor 31, the blower 80, the circulation pump 43, and the third port 533 of the third reversing valve in the cooling system are sequentially closed.

Wherein, calculate respectively according to the temperature in the liquid cooling intracavity and obtain first preset temperature and second preset temperature, include:

acquiring a preset natural cold temperature difference and a preset mixed cold temperature difference;

calculating to obtain a first preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset natural cold temperature difference;

and calculating to obtain a second preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset mixed cold temperature difference.

Specifically, the preset natural cold temperature difference and the preset mixed cold temperature difference can be set according to specific system structures and control requirements, so that the refrigeration requirements of different systems are met, and the refrigeration requirements of the system can be guaranteed by setting the preset natural cold temperature difference and the preset mixed cold temperature difference.

Wherein, obtaining the preset stop temperature comprises:

acquiring the set temperature of the liquid cooling cavity and the start-stop deviation temperature of the cooling system;

and calculating to obtain a preset stop temperature according to the difference value of the set temperature in the liquid cooling cavity and the start-stop deviation temperature.

Specifically, the set temperature and the start-stop deviation temperature of the liquid cooling cavity can be set according to system setting and requirements, and the purpose of saving energy can be achieved while the working temperature of the liquid cooling cavity is accurately controlled by setting the start-stop deviation temperature.

Wherein, still be provided with spray assembly among this cooling system, cool off air-cooled heat exchanger 21 and condenser 32 through spray assembly, when refrigerating according to target refrigeration mode control cooling system, it specifically includes: acquiring dry bulb temperature and wet bulb temperature in an outdoor environment; when the difference value between the dry bulb temperature and the wet bulb temperature is greater than a first set value and the dry bulb temperature is greater than a second set value, a spraying assembly in the cooling system is started to spray so as to improve the heat exchange efficiency of the cooling system. The first set value and the second set value can be set according to system setting and requirements.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling system, characterized in that the cooling system comprises:

the liquid cooling device (10) is provided with a liquid cooling cavity, a liquid cooling inlet and a liquid cooling outlet, and the liquid cooling inlet and the liquid cooling outlet are respectively communicated with the liquid cooling cavity;

the circulating pipeline is provided with a circulating pump (43) and a control assembly, a liquid cooling medium is arranged in the circulating pipeline, and the circulating pipeline is respectively communicated with the liquid cooling inlet and the liquid cooling outlet;

the natural cooling unit (20) is arranged on the circulating pipeline, and the natural cooling unit (20) cools the liquid cooling medium through air cooling;

the heat exchange unit (30) is arranged on the circulating pipeline, and the heat exchange unit (30) is provided with a compressor (31), a condenser (32) and a throttle valve (33) which are communicated in sequence;

wherein the circulating pipeline is selectively communicated with the natural cooling unit (20) and/or the heat exchange unit (30) through the control assembly so as to cool the liquid cooling medium.

2. Cooling system according to claim 1, characterized in that the heat exchange unit (30) further comprises a first heat exchanger (34), the first heat exchanger (34) having a first low temperature side and a first high temperature side exchanging heat with each other, the first low temperature side communicating with the compressor (31) and the throttle valve (33), respectively, and the first high temperature side communicating with the circulation line.

3. The cooling system according to claim 2, wherein the free cooling unit (20) comprises an air-cooled heat exchanger (21), the air-cooled heat exchanger (21) being arranged on the circulation duct.

4. A cooling system according to claim 3, characterised in that the free cooling unit (20) further comprises a first liquid-cooled pump (22) and a second heat exchanger (23), the second heat exchanger (23) having a second low-temperature side and a second high-temperature side in heat exchange with each other, the second low-temperature side, the air-cooled heat exchanger (21) and the first liquid-cooled pump (22) being in end-to-end serial communication, the second high-temperature side being in communication with the circulation line.

5. The cooling system according to claim 4, wherein the circulation line includes an inlet line (41) and an outlet line (42), the circulation pump (43) is provided on the outlet line (42), one end of the inlet line (41) communicates with the liquid cooling inlet, one end of the outlet line (42) communicates with the liquid cooling outlet, the free cooling unit (20) is located upstream of the first heat exchanger (34), the outlet of the first high temperature side communicates with the other end of the inlet line (41), the inlet and the outlet of the second high temperature side communicate with the outlet line (42) in order in the fluid flow direction, and the control assembly includes:

the first reversing valve (51) is arranged on the outlet pipeline (42), a first interface (511) of the first reversing valve is communicated with the liquid cooling outlet, and a second interface (512) of the first reversing valve is communicated with an inlet of the second high-temperature side;

the second reversing valve (52) is arranged on the outlet pipeline (42), a first interface (521) of the second reversing valve is communicated with a third interface (513) of the first reversing valve, a communication position of an outlet of the second high-temperature side and the outlet pipeline (42) is located between the first reversing valve (51) and the second reversing valve (52), a second interface (522) of the second reversing valve is communicated with an inlet of the first high-temperature side, and a third interface (523) of the second reversing valve is communicated with an outlet of the first high-temperature side.

6. The cooling system according to claim 2 or 5, wherein the heat exchange unit (30) further comprises a second liquid-cooled pump (24), an inlet and an outlet of the second liquid-cooled pump (24) are respectively connected with an outlet of the condenser (32) and an inlet of the throttle valve (33), the cooling system further comprises a first bypass, a second bypass and a third bypass, the first bypass is respectively communicated with an inlet and an outlet of the compressor (31), the second bypass is respectively communicated with an inlet and an outlet of the second liquid-cooled pump (24), the third bypass is respectively communicated with an inlet and an outlet of the throttle valve (33), and a check valve (60) is respectively arranged on the first bypass, the second bypass and the third bypass.

7. The cooling system according to claim 3, wherein the circulation line includes an inlet line (41) and an outlet line (42), the circulation pump (43) is provided on the outlet line (42), one end of the inlet line (41) communicates with the liquid cooling inlet, one end of the outlet line (42) communicates with the liquid cooling outlet, the free cooling unit (20) is located upstream of the first heat exchanger (34), the other end of the inlet line (41) communicates with the outlet of the first high temperature side, the inlet and the outlet of the air-cooled heat exchanger (21) communicate with the outlet line (42) in order in the fluid flow direction, and the control assembly includes:

the third reversing valve (53) is arranged on the outlet pipeline (42), a first interface (531) of the third reversing valve is communicated with the liquid cooling outlet, and a second interface (532) of the third reversing valve is communicated with an inlet of the air-cooled heat exchanger (21);

the fourth reversing valve (54) is arranged on the outlet pipeline (42), a first interface (541) of the fourth reversing valve is communicated with a third interface (533) of the third reversing valve, the communication position of the outlet of the air-cooled heat exchanger (21) and the outlet pipeline (42) is located between the third reversing valve (53) and the fourth reversing valve (54), a second interface (542) of the fourth reversing valve is communicated with the inlet of the first high-temperature side, and a third interface (543) of the fourth reversing valve is communicated with the outlet of the first high-temperature side.

8. The cooling system according to claim 3, wherein the circulation line includes an inlet line (41) and an outlet line (42), the circulation pump (43) is disposed on the outlet line (42), one end of the inlet line (41) communicates with the liquid cooling inlet, the other end of the inlet line (41) communicates with the outlet of the first high temperature side, one end of the outlet line (42) communicates with the liquid cooling outlet, the other end of the outlet line (42) communicates with the inlet of the air-cooled heat exchanger (21), and the control assembly includes:

a fifth reversing valve (55), wherein the fifth reversing valve (55) is respectively communicated with the outlet of the air-cooled heat exchanger (21), the inlet of the first high-temperature side and the outlet of the first high-temperature side.

9. A cooling system according to claim 3, further comprising a spray assembly capable of cooling the air-cooled heat exchanger (21) and/or the condenser (32).

10. The cooling system of claim 3, further comprising a fan (80), wherein:

the fan (80) cools the air-cooled heat exchanger (21); or the like, or a combination thereof,

the fan (80) cools the condenser (32); or the like, or, alternatively,

fan (80) are right simultaneously air cooled heat exchanger (21) with condenser (32) cool off, just air cooled heat exchanger (21) are located the air inlet side of fan (80), condenser (32) are located the air-out side of air cooled heat exchanger (21).

11. A cooling system according to claim 1, characterized in that it comprises a plurality of said liquid-cooled devices (10) arranged in parallel with each other.

12. A control method of a cooling system to which the cooling system of any one of claims 1 to 11 is applied, the control method comprising:

acquiring the ambient temperature and the temperature in a liquid cooling cavity in the cooling system;

respectively calculating according to the temperature in the liquid cooling cavity to obtain a first preset temperature and a second preset temperature, wherein the first preset temperature is lower than the second preset temperature;

determining a target refrigeration mode according to the relation between the environment temperature and the first preset temperature and the second preset temperature;

and controlling the cooling system to refrigerate according to the target refrigeration mode.

13. The control method of claim 12, wherein determining a target cooling mode based on the relationship between the ambient temperature and the first and second preset temperatures comprises:

taking a natural cooling mode as the target cooling mode when the ambient temperature is less than or equal to the first preset temperature; when the ambient temperature is higher than the first preset temperature and is lower than or equal to the second preset temperature, taking a mixed cold mode as the target refrigeration mode; and when the environment temperature is higher than the second preset temperature, taking a compressor refrigeration mode as the target refrigeration mode.

14. The control method of claim 13, wherein if the target cooling mode is a natural cooling mode, controlling the cooling system to cool according to the target cooling mode comprises:

sequentially opening a third interface (523) of a second reversing valve, a circulating pump (43), a fan (80) and a first liquid-cooling pump (22) in the cooling system to cool the liquid cooling medium; wherein the third port (513) of the first directional valve remains closed; or the like, or, alternatively,

sequentially opening a one-way valve of a first bypass, a one-way valve of a third bypass, a circulating pump (43), a fan (80) and a second liquid cooling pump (24) in the cooling system to cool the liquid cooling medium, wherein the one-way valve of the second bypass is kept closed; or the like, or, alternatively,

sequentially opening a one-way valve of a first bypass, a one-way valve of a third bypass, a circulating pump (43), a fan (80), a first liquid-cooling pump (22) and a second liquid-cooling pump (24) in the cooling system to cool liquid cooling media; the third interface (513) of the first reversing valve, the third interface (523) of the second reversing valve and the one-way valve of the second bypass are kept closed; or the like, or, alternatively,

a third interface (543), a circulating pump (43) and a fan (80) of a fourth reversing valve in the cooling system are sequentially opened to cool the liquid cooling medium; wherein the third port (533) of the third reversing valve remains closed; or the like, or, alternatively,

sequentially opening a fifth reversing valve (55) in the cooling system, a connector communicated with an outlet of the first high-temperature side, a circulating pump (43) and a fan (80) so as to cool the liquid cooling medium; wherein the port of the fifth direction valve (55) communicating with the inlet of the first high temperature side is kept closed.

15. The control method of claim 13, wherein if the target cooling mode is a mixed cooling mode, controlling the cooling system to cool according to the target cooling mode comprises:

sequentially opening a circulating pump (43), a fan (80), a first liquid-cooling pump (22) and a compressor (31) in the cooling system to cool the liquid cooling medium; wherein the third port (513) of the first directional valve and the third port (523) of the second directional valve are both kept closed; or the like, or, alternatively,

sequentially opening a one-way valve of a second bypass in the cooling system, a circulating pump (43), a fan (80), a first liquid-cooling pump (22) and a compressor (31) so as to cool the liquid cooling medium; the third interface (513) of the first reversing valve, the third interface (523) of the second reversing valve, the check valve of the first bypass and the check valve of the third bypass are kept closed; or the like, or a combination thereof,

sequentially opening a circulating pump (43), a fan (80) and a compressor (31) in the cooling system to cool the liquid cooling medium; the third port (533) of the third reversing valve and the third port (543) of the fourth reversing valve are kept closed; or the like, or, alternatively,

sequentially opening a fifth reversing valve (55) in the cooling system, a connector communicated with an inlet of the first high-temperature side, a circulating pump (43), a fan (80) and a compressor (31) so as to cool the liquid cooling medium; wherein the port of the fifth direction valve (55) communicating with the outlet on the first high temperature side is kept closed.

16. The control method of claim 13, wherein if the target cooling mode is a compressor cooling mode, controlling the cooling system to cool according to the target cooling mode comprises:

sequentially opening a third interface (513) of a first reversing valve, a circulating pump (43), a fan (80) and a compressor (31) in the cooling system to cool the liquid cooling medium; wherein the third interface (523) of the second directional valve remains closed; or the like, or a combination thereof,

sequentially opening a one-way valve, a circulating pump (43), a fan (80) and a compressor (31) of a second bypass in the cooling system to cool the liquid cooling medium; wherein the check valve of the first bypass and the check valve of the third bypass are both kept closed; or the like, or, alternatively,

sequentially opening a third interface (513) of a first reversing valve, a one-way valve of a second bypass, a circulating pump (43), a fan (80) and a compressor (31) in the cooling system to cool the liquid cooling medium; the third interface (523) of the second reversing valve, the one-way valve of the first bypass and the one-way valve of the third bypass are kept closed;

sequentially opening a third interface (533) of a third reversing valve in the cooling system, a circulating pump (43), a fan (80) and a compressor (31) to cool the liquid cooling medium; wherein the third port (543) of the fourth directional valve remains closed.

17. The control method according to claim 13, wherein after controlling the cooling system to perform cooling according to the target cooling mode, the control method further comprises:

acquiring a preset stop temperature;

and when the temperature in the liquid cooling cavity is lower than the preset stop temperature, controlling the cooling system to stop refrigerating.

18. The control method according to claim 17, wherein controlling the cooling system to stop cooling if the target cooling mode is a natural cooling mode comprises:

closing a first liquid cooling pump (22), a fan (80), a circulating pump (43) and a third interface (523) of a second reversing valve in the cooling system in sequence; or the like, or, alternatively,

closing a second liquid-cooled pump (24), a fan (80), a circulating pump (43), a check valve of a third bypass and a check valve of a first bypass in the cooling system in sequence; or the like, or, alternatively,

closing a second liquid-cooled pump (24), a first liquid-cooled pump (22), a fan (80), a circulating pump (43), a one-way valve of a third bypass and a one-way valve of a first bypass in the cooling system in sequence; or the like, or, alternatively,

a fan (80), a circulating pump (43) and a third interface (543) of a fourth reversing valve in the cooling system are closed in sequence; or the like, or, alternatively,

and closing the interfaces of a fan (80), a circulating pump (43) and a fifth reversing valve (55) in the cooling system, which are communicated with the outlet of the first high-temperature side in sequence.

19. The control method of claim 17, wherein controlling the cooling system to stop cooling if the target cooling mode is a mixed cooling mode comprises:

a compressor (31), a first liquid-cooling pump (22), a fan (80) and a circulating pump (43) in the cooling system are closed in sequence; or the like, or, alternatively,

closing a compressor (31), a first liquid-cooling pump (22), a fan (80), a circulating pump (43) and a one-way valve of a second bypass in the cooling system in sequence; or the like, or, alternatively,

sequentially closing a compressor (31), a fan (80) and a circulating pump (43) in the cooling system; or the like, or, alternatively,

and closing the interfaces of a compressor (31), a fan (80), a circulating pump (43) and a fifth reversing valve (55) in the cooling system, which are communicated with the inlet of the first high-temperature side in sequence.

20. The control method of claim 17, wherein controlling the cooling system to stop cooling if the target cooling mode is a compressor cooling mode comprises:

closing a compressor (31), a fan (80), a circulating pump (43) and a third interface (513) of a first reversing valve in the cooling system in sequence; or the like, or, alternatively,

closing a compressor (31), a fan (80), a circulating pump (43) and a one-way valve of a second bypass in the cooling system in sequence; or the like, or a combination thereof,

closing a compressor (31), a fan (80), a circulating pump (43), a one-way valve of a second bypass and a third interface (513) of a first reversing valve in the cooling system in sequence; or the like, or, alternatively,

and closing a compressor (31), a fan (80), a circulating pump (43) and a third interface (533) of a third reversing valve in the cooling system in sequence.

21. The method of claim 12, wherein calculating a first predetermined temperature and a second predetermined temperature according to the temperature in the liquid cooling chamber respectively comprises:

calculating to obtain the first preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset natural cold temperature difference;

and calculating to obtain the second preset temperature according to the difference value between the temperature in the liquid cooling cavity and the preset mixed cold temperature difference.

22. The control method according to claim 17, wherein acquiring the preset stop temperature includes:

and calculating to obtain the preset stop temperature according to the difference value between the set temperature in the liquid cooling cavity and the start-stop deviation temperature.

23. The control method according to claim 12, wherein the cooling system is the cooling system according to claim 9, and the controlling of the cooling system to perform cooling according to the target cooling mode includes:

acquiring dry bulb temperature and wet bulb temperature in an outdoor environment;

and when the difference value between the dry bulb temperature and the wet bulb temperature is greater than a first set value and the dry bulb temperature is greater than a second set value, starting a spraying assembly in the cooling system for spraying.