CN114828561A

CN114828561A - Cooling circulation system

Info

Publication number: CN114828561A
Application number: CN202210366001.2A
Authority: CN
Inventors: 魏立国
Original assignee: Wuxi Hongfan Intelligent Technology Co ltd
Current assignee: Wuxi Hongfan Intelligent Technology Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-07-29

Abstract

The invention provides a cooling circulation system which is connected to a load generating heat and comprises a circulating pump, a heat exchange circulation pipeline, a heat absorption circulation pipeline, a degassing device connected with the circulating pump and the heat absorption circulation pipeline, and a pressure stabilizing tank; after flowing through the degassing device, the heat exchange medium is pumped into a heat exchange circulating pipeline under the driving of a circulating pump, and the heat exchange circulating pipeline reflows the heat exchange medium with the reduced temperature into a heat absorption circulating pipeline again; the pressure stabilizing tank is connected into a second pipeline arranged between the degassing device and the circulating pump through a first pipeline, the second pipeline is provided with a pressure sensor, and when the pressure in the second pipeline is lower than a preset pressure threshold value, the pressure stabilizing tank presses a heat exchange medium into the second pipeline through the first pipeline so as to keep the pressure in the second pipeline to be greater than or equal to the preset pressure threshold value. Through the application, the pressure of the heat exchange medium output to the load by the cooling circulation system is constant, air can be effectively exhausted, and therefore the heat exchange efficiency is ensured.

Description

Cooling circulation system

Technical Field

The invention relates to the technical field of heat exchange equipment, in particular to a cooling circulation system.

Background

The data center is deployed by a plurality of servers, and a server cluster is formed by deploying a plurality of servers. Servers generate a large amount of heat during operation, and therefore require a cooling system to dissipate the heat. Compared with air cooling, the water cooling system has higher specific heat capacity, so that the water cooling system has more excellent heat dissipation effect.

The applicant found after search that chinese utility model patent No. CN214792726U discloses a data center utilizing tap water cooling and waste heat recovery. This prior art realizes cooling and waste heat recovery through booster pump, backwash pump and pipeline. In the prior art, such as the aforementioned cooling for the server, the air in the closed pipeline cannot be effectively discharged during the process of injecting a heat exchange medium (e.g., water or antifreeze coolant) into the closed pipeline after installation and start-up; in addition, because heat transfer medium dissolves a certain amount of air, after cooling system starts, heat transfer medium flows to the server to in-process through heat transfer medium's heat exchange effect with load such as cooling server to the server, can lead to gaseous the appearing because heat transfer medium absorbs the heat, thereby produce the bubble in the closed pipeline, thereby lead to heat exchange efficiency greatly reduced. Therefore, no matter in the starting process or the operation process of the cooling system, the defect that the heat exchange efficiency of the heat exchange medium is greatly reduced due to the fact that a certain amount of air exists in the closed pipeline exists, and therefore the heat exchange efficiency of the cooling circulation system for cooling the devices generating heat such as the server (or the data center) is poor in the prior art.

In view of the above, there is a need to improve a cooling circulation system for cooling a device generating heat, such as a server (or a data center), to solve the above problems.

Disclosure of Invention

The present invention is directed to a cooling circulation system, which is used to solve the aforementioned technical drawbacks, and in particular, to achieve complete air exhaust during installation and startup of the cooling circulation system, and to achieve effective air exhaust during continuous cooling of servers in a data center, so as to maintain heat exchange efficiency.

To achieve the above object, the present invention provides a cooling cycle system connected to a load generating heat, comprising:

the heat pump system comprises a circulating pump, a heat exchange circulating pipeline, a heat absorption circulating pipeline, a degassing device connected with the circulating pump and the heat absorption circulating pipeline, and a pressure stabilizing tank;

after flowing through the degassing device, the heat exchange medium is pumped into the heat exchange circulation pipeline under the driving of the circulating pump, and the heat exchange circulation pipeline enables the heat exchange medium with the reduced temperature to flow back into the heat absorption circulation pipeline again; the surge tank through first pipeline access set up in the second pipeline between degasser and the circulating pump, the second pipeline sets up pressure sensor, when the pressure in the second pipeline is less than preset pressure threshold value, the surge tank is gone into heat transfer medium to the second pipeline middling pressure through first pipeline to keep the pressure in the second pipeline to be greater than or equal to preset pressure threshold value.

As a further improvement of the invention, an isolation valve for isolating the heat exchange medium is arranged between the heat exchange circulating pipeline and the heat absorption circulating pipeline.

As a further improvement of the present invention, the heat absorption circulation line includes a third pipe for introducing the heat exchange medium to the load and a fourth pipe for returning the heat exchange medium from the load after absorbing the heat generated by the load again, and the third pipe is connected to the degasser.

As a further improvement of the present invention, the cooling circulation system further comprises a first heat exchange device;

the heat exchange circulating pipeline comprises a fifth pipeline for leading in a heat exchange medium to the first heat exchange device and a sixth pipeline for returning the heat exchange medium subjected to heat exchange treatment from the first heat exchange device again, so that the heat exchange medium with the reduced temperature is led in to a load connected with the cooling circulating system through the sixth pipeline.

As a further improvement of the present invention, the cooling circulation system further comprises: a liquid storage tank, a liquid supplementing pump and a liquid supplementing pipeline;

the liquid supplementing pipeline comprises a seventh pipeline arranged at the bottom of the liquid storage tank, an eighth pipeline connected with the seventh pipeline and connected with the liquid supplementing pump, and a ninth pipeline connected with the liquid supplementing pump, and the ninth pipeline is respectively connected with the second pipeline and the liquid storage tank through a tenth pipeline and an eleventh pipeline;

the ninth pipeline is sequentially provided with a check valve and a first manual valve, the tenth pipeline is provided with a second manual valve, the eleventh pipeline is provided with a first electromagnetic valve, when the pressure sensor detects that the pressure in the second pipeline is greater than or equal to a preset pressure threshold value, the first electromagnetic valve is switched on and closed after a set time is delayed, so that a heat exchange medium is introduced into the liquid storage tank through the eleventh pipeline, the seventh pipeline is provided with a second electromagnetic valve, when the pressure sensor detects that the pressure in the second pipeline is less than the preset pressure threshold value, the second electromagnetic valve is switched on, and the heat exchange medium is supplemented into the second pipeline through the seventh pipeline, the eighth pipeline, the ninth pipeline and the tenth pipeline by a liquid supplementing pump.

As a further improvement of the invention, the top of the liquid storage tank and the top of the degassing device are connected with a transparent pipe, and the transparent pipe is provided with a third manual valve.

As a further improvement of the present invention, the cooling circulation system further comprises: a liquid adding pipeline for adding a heat exchange medium into the second pipeline;

the liquid feeding pipeline comprises a liquid feeding pipe, an

The filter, the third manual valve, the fourth manual valve and the third electromagnetic valve are connected into the liquid feeding pipe, and the liquid feeding pipe is connected into the eighth pipeline; when a heat exchange medium is added into the second pipeline for the first time, the first electromagnetic valve and the second electromagnetic valve are both in a closed state.

As a further improvement of the present invention, the cooling circulation system further comprises: and the emptying pipe is connected with the eighth pipeline and is provided with a fifth manual valve.

As a further improvement of the present invention, the cooling circulation system further comprises: a twelfth pipeline connected with the fifth pipeline, a thirteenth pipeline connected with the sixth pipeline, a fourteenth pipeline connected with the twelfth pipeline and the thirteenth pipeline, and an electric three-way proportional valve; and the electric three-way proportional valve is connected into the twelfth pipeline and communicated with the fourteenth pipeline.

As a further improvement of the present invention, the first heat exchanging device includes a cooling tower, a shell and tube heat exchanger, a positive displacement heat exchanger or a tube heat exchanger.

As a further improvement of the present invention, the cooling cycle system further includes a second heat exchange device, the twelfth pipeline introduces a heat exchange medium to the second heat exchange device, and introduces the heat exchange medium with a reduced temperature to the sixth pipeline through a thirteenth pipeline;

the second heat exchange device comprises an air heat exchanger, a plate heat exchanger or an electric heating semiconductor refrigerating device.

As a further improvement of the present invention, the load includes a data center, a physical server cluster or an air conditioning system;

as a further improvement of the invention, the preset pressure threshold is 7Bar, and the heat exchange medium comprises water or antifreeze type cooling liquid.

Compared with the prior art, the invention has the beneficial effects that:

firstly, when the pressure detected by the pressure stabilizing tank in the second pipeline is lower than a preset pressure threshold value, the pressure stabilizing tank presses a heat exchange medium into the second pipeline through the first pipeline to keep the pressure in the second pipeline to be greater than or equal to the preset pressure threshold value, so that the pressure of the heat exchange medium output to a load in the whole cooling circulation system is always kept at the preset pressure threshold value, and the heat exchange efficiency of the heat exchange medium to the load is ensured;

and secondly, the degasser connected through a third pipeline realizes complete air exhaust in the installation and starting processes, and the cooling circulation system effectively exhausts air in the process of continuously cooling loads such as servers in a data center, so that good heat exchange efficiency is ensured.

Drawings

FIG. 1 is a perspective view of the cooling circuit of the present invention from one perspective;

FIG. 2 is a perspective view of the cooling circuit of the present invention from another perspective;

FIG. 3 is a perspective view of the cooling circuit of the present invention from yet another perspective;

FIG. 4 is a schematic diagram of a lower temperature heat exchange medium pumped into a data center (a subordinate concept of a load) and a higher temperature heat exchange medium generated by the data center after the data center returns to a cooling circulation system to absorb heat from the heat exchange medium;

FIG. 5 is a schematic view of the cooling cycle system of the present invention, in which the heat exchange medium with a higher temperature is cooled by the heat exchange device and re-flows back to the cooling cycle system;

FIG. 6 is a partial schematic view of a fluid reservoir during fluid replacement;

fig. 7 is a perspective view of a degasser included in the cooling cycle system.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and that functional, methodological, or structural equivalents thereof, which are equivalent or substituted by those of ordinary skill in the art, are within the scope of the present invention.

It should be understood that in the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present disclosure.

Referring to fig. 1 to 7, a cooling cycle system according to an embodiment of the present invention is shown, in which a device that generates heat during operation of a load 3 such as a data center, a machine room, and the like, takes away heat generated by the load by means of a heat exchange medium that circulates, so as to ensure that the load operates stably and reliably. The load 3 includes a data center, a cluster of physical servers, or an air conditioning system. In the present embodiment, the applicant exemplifies a data center.

As shown in fig. 1, 4 and 5, the cooling circulation system disclosed in this embodiment can be independently installed between one heat exchange device (e.g., the first heat exchange device 1) or two heat exchange devices (e.g., the first heat exchange device 1 and the second heat exchange device 6) and the load 3, and a flowing heat exchange medium (e.g., water) flows in a closed pipeline to absorb heat generated by the load 3 through the heat exchange devices, and then flows back to the cooling circulation system, and the heat exchange medium with a higher temperature can be cooled by one heat exchange device or two heat exchange devices, and the heat exchange medium with a lower temperature is pumped into the closed pipeline through the cooling circulation system again, and the closed pipeline is connected with a heat generating device (e.g., a CPU, a graphics card, a server water cooling system, etc.) of the load 3, so as to cyclically cool the load 3 under different operating conditions, to ensure reliable and stable operation of the load 3.

Referring to fig. 1 to 3, in the present embodiment, the cooling cycle system is connected to a load 3 that generates heat. The cooling circulation system includes: a circulation pump 60, a heat exchange circulation line, a heat absorption circulation line, a degasser 70 connected to the circulation pump 60 and the heat absorption circulation line, and a surge tank 20. An isolating valve 123 for isolating the heat exchange medium is arranged between the heat exchange circulation pipeline and the heat absorption circulation pipeline, so that the heat exchange medium is prevented from entering the third pipeline 84 through the isolating valve 123, and therefore the heat exchange medium in the pipeline which finally flows to the load 3 along the arrow 82 is liquid with lower temperature, and the cooling effect on the load 3 is ensured.

For ease of description, applicants define the meaning of "main circulation line". The main circulation line may be regarded as a closed circulation line composed of the second pipe 71, the fourth pipe 83, the third pipe 84, the pipe 73 connected to the circulation pump 60, and the low temperature delivery pipe (not shown) and the high temperature delivery pipe (not shown) connected to the load 3, respectively. A heat exchange medium (e.g., water) is continuously circulated in the main circulation line by the driving of the circulation pump 60. The low temperature delivery pipe introduces the heat exchange medium with a relatively low temperature into the load 3 in a direction indicated by an arrow 82 in fig. 1, and after the heat exchange medium absorbs heat generated by the load 3, the heat exchange medium is reintroduced into the fourth pipe 83 in a direction indicated by an arrow 81 in fig. 1 through the high temperature delivery pipe, and the heat exchange medium is continuously flowed in the main circulation pipe by the driving of the circulation pump 60. The two fourth pipes 83 converge and then flow downwards through the degassing device 70, and during the passage through the degassing device 70, the small amount of air remaining in the heat exchange medium can be continuously discharged by means of the degassing device 70 to ensure that no air is present in the main circulation line. Meanwhile, a junction hole 85 for an exhaust valve (not shown) to access is formed at the convergence point of the two fourth pipelines 83. Since the height of the convergence point of the two fourth pipes 83 is not lower than (i.e. the height of the straight section at the highest position of the third pipe 84 or the height of the straight section at the highest position of the third pipe 84), the air in the main circulation pipeline can be exhausted through the exhaust valve.

Referring to fig. 7, the degassing device 70 is vertically inserted into the second pipe 71 so that the heat exchange medium can flow down into the degassing device 70 by its own weight. The degassing device 70 is generally cylindrical and is connected in a vertical direction to a second pipe 71. The degassing device 70 receives the heat exchange medium, which is returned from the load 3 and accumulated in the second pipe 71, and whose temperature is increased by absorbing heat generated by the load 3 during operation, and discharges air (or a small amount of air that has permeated into the main circulation line from the outside) separated by the heat exchange medium due to the temperature increase. Specifically, the degassing device 70 includes an inner tube 702 and an outer tube 701 axially nested in the vertical direction, the inner tube 702 is partially embedded in the outer tube 701 in the vertical direction, a plurality of lateral through holes 703 are formed in the bottom of the inner tube 702 embedded in the outer tube 701 at intervals in the circumferential direction, a cover 705 is arranged at the bottom of the inner tube 701, and a circle of side walls 704 protrudes upwards from the edge of the cover 705. The top of the inner pipe 702 forms an upper interface 706 to the fourth pipe 83 and the bottom of the outer pipe 701 forms a lower interface 707 to the second pipe 71. When the heat exchange medium flows through the degassing device 70, the liquid is blocked by the cover 705 to transversely flow out of the inner pipe 702 from the plurality of lateral through holes 703, so that the vortex formed in the inner pipe 702 by the liquid is dispersed, and the gas in the liquid is discharged into the liquid storage tank 50 through the transparent pipe 58 and is gathered at the top of the liquid storage tank 50. Meanwhile, a mouthpiece 708 into which an exhaust valve (not shown) is coupled may be further provided at the top of the outer tube 701 to exhaust a small amount of air remaining in the outer tube 701 through the exhaust valve. When no gas (or bubbles) exists in the main circulation line, the degassing device 70 always fills the cavity 700 formed by the outer tube 701 with the heat exchange medium.

Further, in this embodiment, after flowing through the degassing device 70, the heat exchange medium is pumped into the heat exchange circulation line under the driving of the circulation pump 60, and the heat exchange circulation line re-flows the heat exchange medium with the reduced temperature back into the heat absorption circulation line. Illustratively, the surge tank 20 is connected to a second pipe 71 disposed between the degassing device 70 and the circulation pump 60 through a first pipe 21, the second pipe 71 is provided with a pressure sensor 2, and the pressure sensor 2 is electrically connected to an upper computer (e.g., PLC, not shown) through a lead (not shown). The upper computer isomorphic lead wires are connected with a first electromagnetic valve 483, a second electromagnetic valve 481, a third electromagnetic valve 480 and an electric three-way proportional valve 90, so that the heat exchange medium is led into the main circulation pipeline, the heat exchange medium is injected into the liquid storage tank 50, and the liquid storage tank 50 performs liquid supplementing and other specific operations on the main circulation pipeline. The heat exchange medium in the second conduit 71 is pumped into the fifth conduit 11 in the direction indicated by arrow 72 in fig. 2 by the driving of the circulation pump 60. At the same time, as shown in fig. 1, a manual valve 212 is arranged in the first pipe 21 and is finally connected transversely to the second pipe 71.

When the pressure in the second pipe 71 is lower than the preset pressure threshold, the surge tank 20 pressurizes the heat transfer medium into the second pipe 71 through the first pipe 21 to maintain the pressure in the second pipe 71 to be greater than or equal to the preset pressure threshold. The surge tank 20 can be pre-filled with compressed gas with a certain pressure, when the pressure in the main circulation pipeline fluctuates, a small amount of heat exchange medium can be pressed into the main circulation pipeline through an air bag (not shown) arranged in the surge tank 20 in the direction shown by an arrow 211 in fig. 1 by expansion, or a small amount of heat exchange medium can be sucked from the main circulation pipeline in the direction opposite to the direction shown by the arrow 211 in fig. 1 due to contraction of the air bag, so that the pressure in the main circulation pipeline is balanced and compensated, the pressure in the main circulation pipeline is buffered, the heat exchange medium in the main circulation pipeline is prevented from flowing more smoothly in a continuous flowing process, the water hammer effect of each pipeline or valve can be prevented, and the looseness of the joints between each pipeline is effectively avoided.

Illustratively, the preset pressure threshold is 7Bar (pressure unit: Bar, 1Bar ═ 0.1Mpa), and the heat exchange medium comprises water or antifreeze coolant. Specifically, the type of the heat exchange medium may be selected according to the installation environment in which the cooling cycle system is installed, for example, water may be selected as the heat exchange medium in a good environment, for example, an environment with ideal temperature and humidity throughout the year, and an antifreeze coolant (for example, a liquid having a freezing point lower than 0 ℃ and good heat exchange performance) may be selected in a severe environment such as severe cold. It should be noted that the preset pressure threshold of 7Bar is only an example and can be adjusted according to the actual usage scenario of the load 3.

The endothermic circulation line comprises a third pipe 84 for introducing the heat exchange medium to the load 3 and a fourth pipe 83 for returning the heat exchange medium from the load 3 after absorbing the heat generated by the load 3, the third pipe 83 being connected to the degassing device 70.

The cooling circulation system further includes a first heat exchanging arrangement 1. The heat exchange circulation pipeline comprises a fifth pipeline 11 for introducing the heat exchange medium into the first heat exchange device 1 and a sixth pipeline 12 for returning the heat exchange medium subjected to the heat exchange treatment from the first heat exchange device 1 again, so that the heat exchange medium with the reduced temperature is introduced into the load 3 connected with the cooling circulation system through the sixth pipeline 12. The fifth pipe 11 guides the heat-absorbed heat exchange medium into the first heat exchange device 1 in the direction indicated by the arrow 112 for temperature reduction, and returns the cooler heat exchange medium after temperature reduction to the cooling circulation device through the sixth pipe 12 in the direction indicated by the arrow 122. The fifth conduit 11 is provided with a valve 111 and the sixth conduit 12 is provided with a valve 121 to facilitate the disassembly of the apparatus shown in figure 1 from the first heat exchange unit 1 and its independent installation and servicing.

Exemplarily, the first heat exchange device 1 includes a cooling tower, a shell and tube heat exchanger, a positive displacement heat exchanger, or a tube heat exchanger. In this embodiment, in order to reduce the energy consumption (e.g. electric energy) of the external heat exchange device for reducing the temperature of the heat exchange medium and adapt to the heat generated by the load 3, the flow of the heat exchange medium between the main circulation line and the first heat exchange device 1 can be cut off by the valve 111 and the valve 121, and the flow of the heat exchange medium between the second heat exchange device 6 can be established only by the twelfth pipe 93 and the thirteenth pipe 94. The heat exchange medium after absorbing heat is introduced into the second heat exchange device 6 for temperature reduction in the direction indicated by arrow 132, and the cooler heat exchange medium after temperature reduction is returned to the cooling circulation device through the thirteenth pipe 94 in the direction indicated by arrow 142.

For example, as shown in fig. 2 and fig. 6, the cooling circulation system disclosed in this embodiment further includes: a liquid storage tank 50, a liquid supplementing pump 5 and a liquid supplementing pipeline. The fluid infusion pipeline comprises a seventh pipeline 17 arranged at the bottom of the fluid storage tank 50, an eighth pipeline 16 connected with the seventh pipeline 17 and connected with the fluid infusion pump 5, and a ninth pipeline 14 connected with the fluid infusion pump 5, wherein the ninth pipeline 14 is respectively connected with the second pipeline 71 and the fluid storage tank 50 through a tenth pipeline 18 and an eleventh pipeline 59. The ninth conduit 14 is provided with a check valve 55 and a first manual valve 51 in sequence, the tenth conduit 18 is provided with a second manual valve 52, the eleventh conduit 59 is provided with a first solenoid valve 483, when the heat exchange medium is filled into the main circulation pipeline for the first time and the pressure sensor 2 detects that the pressure in the second pipeline 71 is greater than or equal to a preset pressure threshold value (namely the pressure in the main circulation pipeline is greater than or equal to the preset pressure threshold value), the first electromagnetic valve 483 is turned on and closed after delaying for a set time (for example, delaying for 1-20 seconds), so as to introduce the heat exchange medium into the reservoir 50 through the eleventh pipe 59, the seventh pipe 17 is provided with a second solenoid valve 481, when the pressure sensor 2 detects that the pressure in the second duct 71 is less than a preset pressure threshold, the second solenoid valve 481 is turned on, the second pipe 71 is supplemented with a heat exchange medium by the fluid replacement pump 5 via the seventh pipe 17, the eighth pipe 16, the ninth pipe 14, and the tenth pipe 18. The time for the delayed closing of the first electromagnetic valve 483 can be reasonably selected according to the type of the heat exchange medium. Meanwhile, the first electromagnetic valve 483 notifies the host computer when the pressure threshold (for example, 6.8Bar) is lower than the aforementioned set pressure threshold (for example, 7Bar), manually turns on the first electromagnetic valve 483 in a manual manner, and starts to perform a fluid replacement operation into the fluid reservoir 50. After the fluid infusion pump 5 pumps the heat exchange medium into the fluid storage tank 50, the fluid level of the heat exchange medium in the fluid storage tank 50 can be displayed in real time through a mechanical fluid level gauge 591 arranged on the side of the fluid storage tank 50. Meanwhile, the first electromagnetic valve 483 may be controlled by an upper computer during the process of filling the heat transfer medium into the main circulation line for the first time, so as to automatically open and close, thereby automatically controlling the slave liquid storage tank 50 to perform a liquid replenishment operation of replenishing the missing heat transfer medium into the main circulation line in a subsequent filling process. The fluid infusion operation is controlled by the conduction and the closing of the second solenoid valve 481.

Preferably, in this embodiment, a pressure sensor 2a is further disposed in the third pipe 84 which can be vertically arranged, and the pressure sensor 2a is electrically connected to an upper computer through a lead (not shown), so that the pressure of the heat exchange medium in the third pipe 84 is detected through the pressure sensor 2a, the pressures of the heat exchange medium with lower temperature and the heat exchange medium with higher temperature in the second pipe 71 and the third pipe 84 are detected respectively, and after the pressure data is collected and compared by the upper computer, whether pressure fluctuation exists or not is determined. When pressure fluctuations occur, a small amount of heat exchange medium can be released or absorbed through the surge tank 20 to equalize and stabilize the pressure in the main circulation line. The applicant has also noted that the surge tank 20 may also be considered a passive pressure regulating device (i.e. not controlled by an upper computer).

Because the heat exchange medium may be lack of the heat exchange medium in the main circulation pipeline due to the loose joint and the small leakage of part of the pipeline joints, the heat exchange medium can be supplemented through the liquid supplementing pipeline. Specifically, the fluid replenishing pipeline replenishes the heat exchange medium into the main circulation pipeline when the heat exchange medium is lacked in the main circulation pipeline. Specifically, when the fluid replacement operation needs to be performed, the second electromagnetic valve 481 is in an open state, and at this time, the third electromagnetic valve 480 is closed immediately after the fluid filling is completed, the heat exchange medium stored in the reservoir 50 flows into the eighth pipe 16 in the direction shown by the arrow 484 in fig. 6 under the action of gravity, and a part of the heat exchange medium output from the reservoir 50 is pumped into the main circulation pipe under the driving of the fluid replacement pump 5, so that the fluid replacement operation is performed.

The top of the liquid storage tank 50 is connected with the top of the degasser 70 through a transparent pipe 58, and the transparent pipe 58 is provided with a third manual valve 56. By providing the transparent tube 58, it is possible to judge whether the deaerator 70 completely exhausts the air in the main circulation line by observing whether or not the air bubbles exist in the transparent tube 58 after the third manual valve 56 is opened through the transparent tube 58.

Referring to fig. 1, the cooling cycle system further includes: a charging line 30 for charging the heat exchange medium into the second pipe 71. The liquid feeding pipeline 30 comprises a liquid feeding pipe 34, a filter 32, a third manual valve 33, a fourth manual valve 35 and a third electromagnetic valve 480, wherein the filter 32, the third manual valve 33, the fourth manual valve 35 and the third electromagnetic valve 480 are connected into the liquid feeding pipe 34, and the liquid feeding pipe 34 is connected into the eighth pipeline 16; when the heat exchange medium is added into the second pipe 71 for the first time, both the first electromagnetic valve 483 and the second electromagnetic valve 481 are in a closed state. The filter 32 is disposed between the fourth manual valve 35 and the third manual valve 33 so that the filter 32 is separately replaced after the fourth manual valve 35 and the third manual valve 33 are manually closed. The end of the filler pipe 30 may be immersed in a heat exchange medium via a pipe (e.g. a hose), which may flow in a direction indicated by arrow 31 in fig. 1 inside the filler pipe 34. Referring to fig. 2, in the liquid charging process, the third electromagnetic valve 480 is opened, and at this time, the first electromagnetic valve 483 and the second electromagnetic valve 481 are both in a closed state under the control of the upper computer. The heat exchange medium flows in the filler pipe 34 along the flow path indicated by the arrow 31 into the eighth conduit 16. The substitution pump 5 drives the heat exchange medium through the check valve 55 and continues along the flow path indicated by the arrow 141 in fig. 2 through the first manual valve 51 in the ninth conduit 14, and since the first electromagnetic valve 483 is closed at this time, the heat exchange medium can only flow through the tenth conduit 18 and cannot flow into the eleventh conduit 59. The heat exchange medium is then pumped into the main circulation line in the tenth conduit 18 in the direction indicated by arrow 181, and eventually the heat exchange medium in the main circulation line assumes a "full" state (i.e. no air or no air bubbles in the main circulation line).

As shown in fig. 1, fig. 2 and fig. 6, the cooling circulation system disclosed in the present embodiment further includes: an evacuation pipe 19 connected to the eighth conduit 16, the evacuation pipe 19 being provided with a fifth manual valve 195. When the cooling circulation system needs to be serviced or emptied of the heat exchange medium, the fifth manual valve 195 may be manually opened and the heat exchange medium flowing in the main circulation line may be completely discharged.

As shown in fig. 1, the cooling circulation system further includes: a twelfth pipe 93 connecting the fifth pipe 11, a thirteenth pipe 94 connecting the sixth pipe 12, a fourteenth pipe 91 connecting the twelfth pipe 93 and the thirteenth pipe 94, and an electric three-way proportional valve 90. The electric three-way proportional valve 90 is connected to the twelfth pipe 93 and communicates with the fourteenth pipe 91. The electrically operated three-way proportional valve 90 is provided with a flange 92 connected to a conduit (not shown) leading in the direction of arrow 132 to the second heat exchange means 6 for cooling. The heat exchange medium re-flowed back through the thirteenth pipe 94 in the direction indicated by the arrow 142 may be mixed in the direction indicated by the arrow 142 with the heat exchange medium cooled by the second heat exchange device 6 flowing in the direction indicated by the arrow 122 in fig. 1, and after being converged and flowed into the third pipe 84 in the direction indicated by the arrow 122, thereby performing cooling and cooling on the load 3 cyclically.

Illustratively, the cooling cycle system further includes a second heat exchanging device 6, and the twelfth pipe 93 introduces a heat exchanging medium to the second heat exchanging device 6, and introduces the reduced-temperature heat exchanging medium to the sixth pipe 12 through the thirteenth pipe 94 by using the second heat exchanging device 6. The second heat exchanging means 6 comprises an air heat exchanger, a plate heat exchanger or an electric heating semiconductor refrigerating device. Compared with the first heat exchange device 1, the second heat exchange device 6 has the characteristics of lower heat exchange efficiency and lower energy consumption, and is very suitable for being independently started in a scene that the load 3 is not in full-load operation or the heat generated by the load 3 is less when the load 3 is in operation, or being used together with the first heat exchange device 1 or being used in proportion.

It should be noted that the first heat exchange device 1 is a high-efficiency heat exchange device to adapt to a high-load operation condition that the load 3 is at a high calorific value; the second heat exchange arrangement 6 is a low efficiency heat exchange arrangement to accommodate low load operation where the load 3 is at a low calorific value. The cooling circulation system can be connected with the first heat exchange device 1 independently or simultaneously, and the mixing proportion between the heat exchange medium with lower temperature and the heat exchange medium with lower temperature, which flows back to the cooling circulation system from the second heat exchange device 6, and the heat exchange medium with lower temperature and flows back to the cooling circulation system from the first heat exchange device 1 is mixed through the electric three-way proportional valve 90, and when the load 3 is not in full-load operation, the heat exchange medium which flows back from the load 3 and rises in temperature can be cooled only through the second heat exchange device 6, so that the energy consumption for cooling the heat exchange medium is reduced, the dynamic adjustment can be realized according to the dynamically changed load formed by the load 3, even the first heat exchange device 1 and the second heat exchange device 6 are switched or the first heat exchange device 1 and the second heat exchange device 6 are switched simultaneously, therefore, the flexibility of cooling the heat exchange medium is realized, and the energy consumption consumed by cooling the heat exchange medium is remarkably saved. Even after the

valves

111 and 121 are closed when the load 3 is at a very low power consumption (i.e., in an operating condition in which the amount of heat generated by the load 3 is very low), the heat exchange process (e.g., the temperature reduction process) is performed on the heat exchange medium only by the second heat exchange device 6.

In summary, in the cooling cycle system in this embodiment, when the pressure detected by the surge tank in the second pipeline 71 (which is a part of the main cycle pipeline) is lower than the preset pressure threshold, the surge tank presses the heat exchange medium into the second pipeline 71 through the first pipeline to keep the pressure in the second pipeline 71 greater than or equal to the preset pressure threshold, so that the pressure of the heat exchange medium output to the load in the entire cooling cycle system is always kept at the preset pressure threshold, thereby ensuring the heat exchange efficiency of the heat exchange medium to the load 3; meanwhile, the degasser 70 connected through the third pipe 84 realizes complete air discharge during installation and start-up, and the cooling circulation system effectively discharges air during continuous cooling of loads such as servers in the data center, thereby ensuring good heat exchange efficiency.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A cooling circulation system connected to a load that generates heat, comprising:

2. The cooling cycle system of claim 1, wherein an isolation valve for isolating the heat exchange medium is provided between the heat exchange cycle line and the heat absorption cycle line.

3. The cooling cycle system of claim 1, wherein the heat absorption cycle line comprises a third pipe for introducing the heat exchange medium to the load and a fourth pipe for returning the heat exchange medium from the load after absorbing the heat generated by the load, and the third pipe is connected to the degasser.

4. The cooling circulation system of claim 1, further comprising a first heat exchange device;

5. The cooling circulation system of claim 1, further comprising: a liquid storage tank, a liquid supplementing pump and a liquid supplementing pipeline;

6. The cooling circulation system of claim 5, wherein a transparent tube is connected to the top of the liquid storage tank and the top of the degasser, and the transparent tube is provided with a third manual valve.

7. The cooling circulation system of claim 5, further comprising: a liquid adding pipeline for adding a heat exchange medium into the second pipeline;

the liquid feeding pipeline comprises a liquid feeding pipe, an

The filter, the third manual valve, the fourth manual valve and the third electromagnetic valve are connected into the liquid adding pipe, and the liquid adding pipe is connected into the eighth pipeline; when a heat exchange medium is added into the second pipeline for the first time, the first electromagnetic valve and the second electromagnetic valve are both in a closed state.

8. The cooling circulation system of claim 5, further comprising: and the emptying pipe is connected with the eighth pipeline and is provided with a fifth manual valve.

9. The cooling circulation system of claim 4, further comprising: a twelfth pipeline connected with the fifth pipeline, a thirteenth pipeline connected with the sixth pipeline, a fourteenth pipeline connected with the twelfth pipeline and the thirteenth pipeline, and an electric three-way proportional valve; and the electric three-way proportional valve is connected into the twelfth pipeline and communicated with the fourteenth pipeline.

10. The cooling circulation system according to claim 4, wherein the first heat exchanging device 1 comprises a cooling tower, a shell and tube heat exchanger, a positive displacement heat exchanger or a tube heat exchanger.

11. The cooling cycle system of claim 9, further comprising a second heat exchanging device, wherein the twelfth pipe guides the heat exchanging medium to the second heat exchanging device, and guides the heat exchanging medium with the reduced temperature to the sixth pipe through a thirteenth pipe;

12. The cooling circulation system of any one of claims 1 to 11, wherein the load comprises a data center, a cluster of physical servers, or an air conditioning system.

13. The cooling circulation system of claim 12, wherein the preset pressure threshold is 7Bar and the heat exchange medium comprises water or antifreeze coolant.