CN114828561B - Cooling circulation system - Google Patents
Cooling circulation system Download PDFInfo
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- CN114828561B CN114828561B CN202210366001.2A CN202210366001A CN114828561B CN 114828561 B CN114828561 B CN 114828561B CN 202210366001 A CN202210366001 A CN 202210366001A CN 114828561 B CN114828561 B CN 114828561B
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- exchange medium
- heat
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- 238000001816 cooling Methods 0.000 title claims abstract description 90
- 238000010521 absorption reaction Methods 0.000 claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 238000007872 degassing Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 57
- 230000001502 supplementing effect Effects 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000002528 anti-freeze Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 2
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 230000006872 improvement Effects 0.000 description 11
- 238000009434 installation Methods 0.000 description 6
- 238000002637 fluid replacement therapy Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000001802 infusion Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005112 continuous flow technique Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20763—Liquid cooling without phase change
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The application provides a cooling circulation system, which is connected to a load for generating heat and comprises a circulation pump, a heat exchange circulation pipeline, a heat absorption circulation pipeline, a degassing device connected to the circulation pump and the heat absorption circulation pipeline, and a pressure stabilizing tank; after flowing through the degasser, the heat exchange medium is pumped into a heat exchange circulation pipeline under the drive of a circulation pump, and the heat exchange circulation pipeline returns the heat exchange medium with reduced temperature into a heat absorption circulation pipeline again; the pressure stabilizing tank is connected to 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. By the application, the constant pressure of the heat exchange medium output by the cooling circulation system to the load is realized, and the air can be effectively discharged, so that the heat exchange efficiency is ensured.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a cooling circulation system.
Background
Data center deployments are composed of a multitude of servers, and a plurality of server deployments form a server cluster. The server generates a lot of heat during operation, and therefore a cooling system is required to dissipate heat. Compared with air cooling, the water cooling system has larger specific heat capacity, so that the water cooling system has more excellent heat dissipation effect.
After searching, the applicant finds that the Chinese patent of utility model with the bulletin number of CN214792726U discloses that a data center uses tap water cooling and waste heat recovery. The prior art realizes cooling and waste heat recovery through a booster pump, a reflux pump and a pipeline. Such as the aforementioned prior art for cooling down a server, the air in the closed duct cannot be effectively discharged during the process of requiring injection of a heat exchange medium (e.g., water or antifreeze type coolant) into the closed duct after installation and start-up; in addition, as a certain amount of air is dissolved in the heat exchange medium, after the cooling system is started, the heat exchange medium circularly flows to the server, so that gas is separated out due to the heat absorption of the heat exchange medium in the process of cooling the server and other loads through the heat exchange effect of the heat exchange medium, and bubbles are generated in the closed pipeline, so that the heat exchange efficiency is greatly reduced. Therefore, there is a defect that the heat exchange efficiency of the heat exchange medium is greatly reduced due to the presence of a certain amount of air in the closed pipeline during the start-up process or the operation process of the cooling system, so that the heat exchange efficiency of the cooling circulation system for cooling the devices for generating heat of the server (or the data center) and the like in the prior art is poor.
In view of this, there is a need for an improvement in the cooling circulation system for cooling the devices for generating heat of servers (or data centers) and the like in the related art to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to disclose a cooling circulation system for solving the technical defects, in particular to realize thorough air discharge during the installation and starting process of the cooling circulation system and realize effective air discharge during the continuous cooling process of servers in a data center so as to maintain the heat exchange efficiency.
To achieve the above object, the present invention provides a cooling circulation system connected to a load generating heat, comprising:
The device 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 degasser, the heat exchange medium is pumped into the heat exchange circulation pipeline under the drive of the circulation pump, and the heat exchange circulation pipeline returns the heat exchange medium with reduced temperature into the heat absorption circulation pipeline again; the pressure stabilizing tank is connected to 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 larger than or equal to the 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 circulation pipeline and the heat absorption circulation pipeline.
As a further improvement of the invention, the heat absorption circulation line comprises a third pipeline for leading the heat exchange medium into the load and a fourth pipeline for re-flowing the heat exchange medium after absorbing the heat generated by the load from the load, wherein the third pipeline is connected with the degasser.
As a further improvement of the invention, the cooling circulation system further comprises a first heat exchange device;
The heat exchange circulation pipeline comprises a fifth pipeline for guiding the heat exchange medium to the first heat exchange device and a sixth pipeline for re-flowing the heat exchange medium subjected to heat exchange treatment from the first heat exchange device, so that the heat exchange medium with reduced temperature is guided to a load connected with the cooling circulation system through the sixth pipeline.
As a further improvement of the present invention, the cooling circulation system further includes: 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, wherein 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 larger than or equal to a preset pressure threshold value, the first electromagnetic valve is conducted and closed after time delay is set for a set time, so that heat exchange medium is led 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 smaller than the preset pressure threshold value, the second electromagnetic valve is conducted, and the heat exchange medium is supplemented into the second pipeline through the fluid supplementing pump through the seventh pipeline, the eighth pipeline, the ninth pipeline and the tenth pipeline.
As a further improvement of the invention, the top of the liquid storage tank and the top of the degasser 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 includes: a liquid adding pipeline for adding a heat exchange medium into the second pipeline;
The liquid adding pipeline comprises a liquid adding pipe and
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 the heat exchange medium is added into the second pipeline for the first time, the first electromagnetic valve and the second electromagnetic valve are in a closed state.
As a further improvement of the present invention, the cooling circulation system further includes: an evacuation tube connected to the eighth conduit, the evacuation tube being provided with a fifth manual valve.
As a further improvement of the present invention, the cooling circulation system further includes: a twelfth pipe connected to the fifth pipe, a thirteenth pipe connected to the sixth pipe, a fourteenth pipe connected to the twelfth pipe and the thirteenth pipe, and an electric three-way proportional valve; the electric three-way proportional valve is connected into the twelfth pipeline and communicated with the fourteenth pipeline.
As a further development of the invention, the first heat exchange device comprises a cooling tower, a tube heat exchanger, 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 circulation system further includes a second heat exchange device, the twelfth pipe introduces the heat exchange medium to the second heat exchange device, and introduces the heat exchange medium after the temperature reduction to the sixth pipe through the thirteenth pipe through the second heat exchange device;
The second heat exchange device comprises an air heat exchanger, a plate heat exchanger or an electric heating semiconductor refrigerating device.
As a further refinement of the invention, the load comprises 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 coolant.
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 so as 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 deaeration device connected with the third pipeline thoroughly discharges air in the installation starting process, and the cooling circulation system effectively discharges air in the continuous cooling process of loads such as servers in the data center, so that good heat exchange efficiency is ensured.
Drawings
FIG. 1 is a perspective view of the cooling circulation system of the present invention in one view;
FIG. 2 is a perspective view of the cooling circulation system of the present invention in another view;
FIG. 3 is a perspective view of the cooling circulation system of the present invention in yet another view;
FIG. 4 is a schematic diagram of pumping a lower temperature heat exchange medium to a data center (a lower concept of load) and the heat exchange medium generated by the data center flowing back through the heat exchange medium to the cooling circulation system to absorb heat;
FIG. 5 is a schematic diagram of the cooling circulation system according to the present invention, in which a heat exchange medium with a higher temperature is cooled by a heat exchange device and re-flowed back to the cooling circulation system;
FIG. 6 is a partial schematic view of the fluid reservoir when performing a fluid replacement operation;
fig. 7 is a perspective view of a degasser included in the cooling circulation system.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
It should be understood that, in the present application, the terms "center", "longitudinal", "transverse", "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 the orientations or positional relationships shown in the drawings are merely for convenience in describing the present technical solution and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present technical solution.
In a specific embodiment of the cooling circulation system according to the present invention shown in fig. 1 to 7, the heat generated by the load 3 such as a data center and a machine room is taken away by the heat exchange medium flowing in a circulating manner by the device for generating heat during operation of the load, so as to ensure that the load operates stably and reliably. The load 3 comprises a data center, a cluster of physical servers or an air conditioning system. In this embodiment, applicants illustratively set forth in the data center as an example.
As shown in fig. 1,4 and 5, the cooling circulation system disclosed in this embodiment may be independently installed and connected with one heat exchange device (for example, the first heat exchange device 1) or two heat exchange devices (for example, the first heat exchange device 1 and the second heat exchange device 6) and the load 3, and a heat exchange medium (for example, water) in a flowing state flows in a closed pipeline, so as to absorb heat generated by the load 3 through the heat exchange devices and then flow back to the cooling circulation system, and the heat exchange medium with a higher temperature may be cooled through one heat exchange device or two heat exchange devices, and the heat exchange medium with a reduced temperature may be pumped into the closed pipeline through the cooling circulation system again, and the closed pipeline is connected with a heating device (for example, a CPU, a graphics card, a server water cooling system, etc.) of the load 3, so that the load 3 in different operation conditions is cooled down circularly, and the load 3 is ensured to operate reliably and stably.
In the present embodiment, with reference to fig. 1 to 3, the cooling circulation system is connected to a load 3 that generates heat. The cooling circulation system includes: the device comprises a circulating pump 60, a heat exchange circulating pipeline, a heat absorption circulating pipeline, a degasser 70 connected with the circulating pump 60 and the heat absorption circulating pipeline, and a pressure stabilizing tank 20. An isolation valve 123 for isolating the heat exchange medium is arranged between the heat exchange circulation line and the heat absorption circulation line, so that the heat exchange medium is prevented from entering the third pipeline 84 by the isolation valve 123, and the heat exchange medium in the pipeline which finally flows to the load 3 along the arrow 82 is liquid with lower temperature, so that the cooling effect on the load 3 is ensured.
For ease of description, applicant defines the meaning of "main circuit". The main circulation line can be regarded as a closed circulation line formed by the second pipe 71, the fourth pipe 83, the third pipe 84, the pipe 73 that is connected to the circulation pump 60, and a low-temperature delivery pipe (not shown) and a high-temperature delivery pipe (not shown) that are connected to the load 3, respectively, by way of example in the present embodiment. The heat exchange medium (e.g., water) is continuously circulated in the main circulation line by the circulation pump 60. The low-temperature transfer line is guided to the load 3 in the direction indicated by the arrow 82 in fig. 1, and after the heat transfer medium absorbs the heat generated by the load 3, the heat transfer medium is reintroduced into the fourth line 83 in the direction indicated by the arrow 81 in fig. 1 through the high-temperature transfer line, and the heat transfer medium is continuously circulated in the main circulation line by the driving of the circulation pump 60. The two fourth pipes 83 are converged and then flow downwards through the deaerator 70, and during the process of passing through the deaerator 70, a small amount of air remaining in the heat exchange medium can be continuously discharged by means of the deaerator 70, so as to ensure that no air exists in the main circulation pipe. Meanwhile, an interface hole 85 for the access of an exhaust valve (not shown) 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., is equal to or higher than the height of the straight section of the highest position of the third pipe 84), the air in the main circulation pipe can be discharged through the exhaust valve.
Referring to fig. 7, the deaerator 70 is vertically connected to a second pipe 71 so that the heat exchange medium can flow downwardly into the deaerator 70 by its own weight. The deaeration device 70 is generally cylindrical and is connected in a vertical direction to a second conduit 71. The deaeration device 70 receives the heat exchange medium which flows back from the load 3 and is concentrated in the second pipe 71, generates heat when the load 3 is operated and absorbs the heat, and then the temperature of the heat exchange medium is increased, and the air (or a small amount of air which is permeated into the main circulation pipeline from the outside) separated out from the heat exchange medium due to the temperature increase is discharged. Specifically, the degassing device 70 includes an inner tube 702 and an outer tube 701 which are 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 circumferentially spaced apart from each other and are formed in the bottom of the inner tube 702 embedded in the outer tube 701, a sealing cover 705 is disposed in the bottom of the inner tube 701, and a circle of side walls 704 protrude upward from the edge of the sealing cover 705. The top of the inner tube 702 forms an upper interface 706 with the fourth tube 83 and the bottom of the outer tube 701 forms a lower interface 707 with the second tube 71. When the heat exchange medium flows through the degasser 70, the liquid is blocked by the cover 705, so as to flow out of the inner tube 702 transversely from the plurality of lateral through holes 703, thereby breaking up the vortex formed by the liquid in the inner tube 702, and enabling the gas in the liquid to be discharged into the liquid storage tank 50 through the transparent tube 58 and to be converged at the top of the liquid storage tank 50. At the same time, an interface hole 708 may be provided at the top of the outer tube 701, into which a vent valve (not shown) is inserted, to vent a small amount of air remaining in the outer tube 701 through the vent valve. When no gas (or bubbles) is present in the main circulation line, the deaeration device 70 always fills the cavity 700 formed by the outer tube 701 with heat exchange medium.
Further, in this embodiment, after the heat exchange medium flows through the deaerator 70, the heat exchange medium is pumped into the heat exchange circulation pipeline under the driving of the circulation pump 60, and the heat exchange circulation pipeline returns the heat exchange medium with the reduced temperature back into the heat absorption circulation pipeline. Illustratively, the surge tank 20 is connected to a second pipe 71 disposed between the degasser 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 sensors 2 are electrically connected to an upper computer (for example, PLC, not shown) through wires (not shown). The upper computer is 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 through isomorphic lead wires, so that heat exchange medium is led into a main circulation pipeline, the heat exchange medium is injected into a liquid storage tank 50, and the liquid storage tank 50 performs specific operations such as liquid supplementing and the like on the main circulation pipeline. The heat exchange medium in the second conduit 71 is pumped into the fifth conduit 11 by the circulation pump 60 in the direction indicated by arrow 72 in fig. 2. Meanwhile, as shown in fig. 1, a manual valve 212 is provided in the first duct 21 and finally laterally opens into the second duct 71.
When the pressure in the second pipe 71 is lower than the preset pressure threshold, the surge tank 20 presses the heat exchange medium into the second pipe 71 through the first pipe 21 to maintain the pressure in the second pipe 71 greater than or equal to the preset pressure threshold. The surge tank 20 can be pre-flushed 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 by an air bag (not shown) arranged in the surge tank 20 through expansion along the direction indicated by an arrow 211 in fig. 1, or a small amount of heat exchange medium can be pumped from the main circulation pipeline along the direction opposite to the direction indicated by the arrow 211 in fig. 1 due to the shrinkage of the air bag, so that the pressure in the main circulation pipeline realizes balance and pressure compensation, plays a role in buffering the pressure in the main circulation pipeline, thereby avoiding smoother heat exchange medium in the main circulation pipeline in the continuous flow process, preventing each pipeline or valve from having a 'water hammer effect', and effectively avoiding loosening at the interface between each pipeline.
The preset pressure threshold is, for example, 7Bar (pressure unit: bar, 1 bar=0.1 Mpa), the heat exchange medium comprising water or an antifreeze coolant. Specifically, the type of the heat exchange medium can be reasonably selected according to the installation environment in which the cooling circulation system is installed, for example, in a use environment in which good environment such as year-round temperature and humidity are ideal, water is selected as the heat exchange medium, and in a severe use environment such as severe cold, an antifreezing cooling liquid (such as liquid with freezing point lower than 0 ℃ and good heat exchange performance) is selected. It should be noted that the above-mentioned preset pressure threshold value of 7Bar is only an example, and may be adjusted according to the actual usage situation of the load 3.
The heat absorption circulation line includes a third pipe 84 for introducing the heat exchange medium to the load 3, and a fourth pipe 83 for re-circulating the heat exchange medium from the load 3 after absorbing the heat generated by the load 3, and the third pipe 83 is connected to the deaerator 70.
The cooling circulation system further comprises a first heat exchange device 1. The heat exchange circulation line includes a fifth pipe 11 for introducing the heat exchange medium to the first heat exchange device 1 and a sixth pipe 12 for recirculating the heat exchange medium after the heat exchange treatment from the first heat exchange device 1, so that the reduced-temperature heat exchange medium is introduced into the load 3 connected to the cooling circulation system through the sixth pipe 12. The fifth pipe 11 guides the heat-absorbed heat-exchange medium into the first heat exchange device 1 in the direction indicated by an arrow 112 for cooling treatment, and returns the cooled heat-exchange medium to the cooling circulation device again through the sixth pipe 12 in the direction indicated by an 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 detachment and the separate installation and maintenance of the device shown in fig. 1 from the first heat exchange device 1.
The first heat exchange device 1 comprises, for example, a cooling tower, a tube heat exchanger, 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 heat exchange device outside the heat exchange device for reducing the temperature of the heat exchange medium and to 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 may be shut off by the valve 111 and the valve 121, and the flow of the heat exchange medium with the second heat exchange device 6 may be established only by the twelfth and thirteenth pipes 93 and 94. The heat exchange medium after heat absorption is led into the second heat exchanger 6 in the direction indicated by arrow 132 for cooling treatment and the colder heat exchange medium after temperature reduction is returned back to the cooling circuit via the thirteenth conduit 94 in the direction indicated by arrow 142.
Illustratively, as shown in connection with fig. 2 and 6, the cooling circulation system disclosed in the present embodiment further includes: a liquid storage tank 50, a liquid supplementing pump 5 and a liquid supplementing pipeline. The fluid infusion line includes a seventh pipe 17 disposed at the bottom of the fluid reservoir 50, an eighth pipe 16 connected to the seventh pipe 17 and connected to the fluid infusion pump 5, and a ninth pipe 14 connected to the fluid infusion pump 5, wherein the ninth pipe 14 is connected to the second pipe 71 and the fluid reservoir 50 through a tenth pipe 18 and an eleventh pipe 59, respectively. The ninth pipe 14 is provided with the check valve 55 and the first manual valve 51 in order, the tenth pipe 18 is provided with the second manual valve 52, the eleventh pipe 59 is provided with the first electromagnetic valve 483, when the heat exchange medium is first filled into the main circulation pipe, and when the pressure sensor 2 detects that the pressure in the second pipe 71 is greater than or equal to a preset pressure threshold value (i.e., the pressure in the main circulation pipe is greater than or equal to the preset pressure threshold value), the first electromagnetic valve 483 is conducted and is closed after a set time (for example, 1 to 20 seconds is delayed) so as to introduce the heat exchange medium into the liquid storage tank 50 through the eleventh pipe 59, the seventh pipe 17 is provided with the second electromagnetic valve 481, and when the pressure sensor 2 detects that the pressure in the second pipe 71 is less than the preset pressure threshold value, the second electromagnetic valve 481 is conducted, and the heat exchange medium is filled into the second pipe 71 through the additional pump 5 via the seventh pipe 17, the eighth pipe 16, the ninth pipe 14 and the tenth pipe 18. The time for which the first solenoid valve 483 is closed with a delay may be appropriately selected according to the kind of heat exchange medium. Meanwhile, when the pressure threshold (for example, 6.8 Bar) is lower than the set pressure threshold (for example, 7 Bar), the first electromagnetic valve 483 notifies the upper computer, and the first electromagnetic valve 483 is manually turned on and the fluid supplementing operation to the fluid reservoir 50 is started. After the heat exchange medium is pumped into the liquid storage tank 50 by the fluid supplementing pump 5, the liquid level of the heat exchange medium in the liquid storage tank 50 can be displayed in real time through a mechanical liquid level meter 591 arranged on the side part of the liquid storage tank 50. Meanwhile, the first electromagnetic valve 483 can be controlled by an upper computer in the process of filling the heat exchange medium into the main circulation pipeline for the first time, so as to realize automatic opening and closing, thereby automatically controlling the liquid supplementing operation of adding part from the liquid storage tank 50 and then supplementing the missing heat exchange medium into the main circulation pipeline. The fluid replacement operation is controlled by the conduction and closure of the second solenoid valve 481.
Preferably, in this embodiment, a pressure sensor 2a is further disposed in the third pipeline 84 that may be vertically disposed, and the pressure sensor 2a is electrically connected to an upper computer through a wire (not shown), so that the pressure of the heat exchange medium in the third pipeline 84 is detected by the pressure sensor 2a, so that the pressures of the heat exchange medium with a lower temperature and the heat exchange medium with a higher temperature in the second pipeline 71 and the third pipeline 84 are detected respectively, and after pressure data are collected and compared by the upper computer, it is determined whether there is pressure fluctuation. When pressure fluctuations occur, a small amount of heat exchange medium may be released or absorbed by surge tank 20 to balance and stabilize the pressure in the main circulation line. Meanwhile, the applicant points out that the surge tank 20 can also be regarded as a passive pressure regulating device (i.e., not controlled by an upper computer).
Because the heat exchange medium may lack the heat exchange medium in the main circulation pipeline due to loosening of part of pipeline joints and a small amount of leakage, the heat exchange medium can be supplemented through the fluid supplementing pipeline. Specifically, when the heat exchange medium is absent in the main circulation pipeline, the liquid supplementing pipeline supplements the heat exchange medium into the main circulation pipeline. Specifically, when the fluid replacement operation needs to be performed, the second electromagnetic valve 481 is opened, and at this time, the third electromagnetic valve 480 is closed immediately after the fluid is filled, the heat exchange medium stored in the fluid reservoir 50 flows into the eighth pipe 16 in the direction indicated by the arrow 484 in fig. 6 by the action of gravity, and part of the heat exchange medium output from the fluid reservoir 50 is pumped into the main circulation line by the drive of the fluid replacement pump 5, so that the fluid replacement operation is performed.
The top of the liquid storage tank 50 and the top of the degasser 70 are connected with a transparent pipe 58, and the transparent pipe 58 is provided with a third manual valve 56. By providing the transparent pipe 58, it is possible to determine whether the deaerator 70 completely empties the air in the main circulation pipe by observing whether or not the air bubbles are present in the transparent pipe 58 after the third manual valve 56 is opened by the transparent pipe 58.
Referring to fig. 1, the cooling circulation system further includes: a charging line 30 for charging the second conduit 71 with a heat exchange medium. The liquid adding pipeline 30 comprises a liquid adding pipe 34, a filter 32, a third manual valve 33, a fourth manual valve 35 and a third electromagnetic valve 480 which are connected into the liquid adding pipe 34, and the liquid adding pipe 34 is connected into the eighth pipeline 16; when the heat exchange medium is first introduced into the second pipe 71, both the first solenoid valve 483 and the second solenoid valve 481 are closed. The filter 32 is disposed between the fourth manual valve 35 and the third manual valve 33 so that the filter 32 is replaced individually after the fourth manual valve 35 and the third manual valve 33 are manually closed. The end of the charging line 30 may be submerged in the heat exchange medium via a pipe (e.g. a hose) which may flow in the charging tube 34 in the direction indicated by arrow 31 in fig. 1. Referring to fig. 2, during the filling process, the third solenoid valve 480 is opened, and at this time, both the first solenoid valve 483 and the second solenoid valve 481 are closed under the control of the host computer. The heat exchange medium flows in the filling pipe 34 into the eighth conduit 16 along the flow path indicated by the arrow 31. The make-up pump 5 drives the flow of the heat exchange medium through the check valve 55 and continues to flow in the ninth conduit 14 through the first manual valve 51 along the flow path indicated by arrow 141 in fig. 2, and since the first solenoid valve 483 is in the closed state 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 causes the heat exchange medium in the main circulation line to assume a "filled" state (i.e. no air or bubbles in the main circulation line).
As shown in fig. 1, 2 and 6, the cooling circulation system according to the present embodiment further includes: an evacuation tube 19 is connected to the eighth conduit 16, the evacuation tube 19 being provided with a fifth manual valve 195. When the cooling circulation system needs to be overhauled or emptied of the heat exchange medium, the fifth manual valve 195 can be opened manually, and the heat exchange medium flowing in the main circulation pipeline is discharged entirely.
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 electric three-way proportional valve 90 is provided with a flange 92 connected to a pipe (not shown) led into the second heat exchanging device 6 in the direction of an arrow 132 to perform a cooling process. The heat exchange medium re-circulated through the thirteenth conduit 94 in the direction indicated by the arrow 142 may be mixed with the heat exchange medium cooled by the second heat exchange means 6 flowing in the direction indicated by the arrow 122 in fig. 1 in the direction indicated by the arrow 142 and, after converging, combined to flow into the third conduit 84 in the direction indicated by the arrow 122, thereby cyclically cooling the load 3.
Illustratively, the cooling circulation system further comprises a second heat exchange device 6, the twelfth conduit 93 leading heat exchange medium to the second heat exchange device 6 and through the second heat exchange device 6 leading the reduced temperature heat exchange medium through the thirteenth conduit 94 to the sixth conduit 12. The second heat exchange means 6 comprise an air heat exchanger, a plate heat exchanger or an electrothermal semiconductor refrigeration 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 used in the scene that the load 3 is not operated under full load or the heat generated by the load 3 is less during operation, or is used together with the first heat exchange device 1 or is used in proportion.
It should be noted that, the first heat exchange device 1 is a high-efficiency heat exchange device, so as to adapt to the high-load working condition that the load 3 is in high heating value; the second heat exchange means 6 is a low efficiency heat exchange means to accommodate low load operation with the load 3 at a low heating value. The cooling circulation system can be independently connected with the first heat exchange device 1, can also be simultaneously connected with at least one first heat exchange device 1 and at least one second heat exchange device 6, and can switch the mixing proportion between the heat exchange medium with lower temperature flowing back from the second heat exchange device 6 to the cooling circulation system and the heat exchange medium with lower temperature flowing back from the first heat exchange device 1 to the cooling circulation system through the electric three-way proportional valve 90, and can cool the heat exchange medium with lower temperature flowing back from the load 3 by means of only one second heat exchange device 6 when the load 3 is not fully operated, thereby not only reducing the energy consumption for cooling the heat exchange medium, but also dynamically adjusting the heat exchange medium according to the dynamic load formed by the load 3, and even switching the heat exchange medium between the first heat exchange device 1 and the second heat exchange device 6 or simultaneously switching the heat exchange medium between the first heat exchange device 1 and the second heat exchange device 6, thereby realizing the flexibility of cooling the heat exchange medium and remarkably saving the energy consumption for cooling the heat exchange medium. Even when the load 3 is at very low power consumption (i.e., when the load 3 is operating at a very low heating value), the valve 111 and the valve 121 may be closed, and then the heat exchange process (e.g., the temperature reduction process) may be performed only on the heat exchange medium by the second heat exchange device 6.
In summary, in the cooling circulation system in this embodiment, when the pressure detected by the pressure stabilizing tank in the second pipe 71 (which is a part of the main circulation pipe) is lower than the preset pressure threshold, the pressure stabilizing tank presses the heat exchange medium into the second pipe 71 through the first pipe to keep the pressure in the second pipe 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 whole cooling circulation system is always kept at the preset pressure threshold, and the heat exchange efficiency of the heat exchange medium to the load 3 is ensured; meanwhile, the deaerator 70 connected through the third pipe 84 realizes thorough air discharge in the installation start-up process and effective air discharge in the continuous cooling process of the load such as the server in the data center by the cooling circulation system, thereby ensuring good heat exchange efficiency.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the 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 characteristics 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. A cooling circulation system connected to a load generating heat, comprising:
The device 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, a pressure stabilizing tank, a liquid storage tank, a liquid supplementing pump and a liquid supplementing pipeline;
After flowing through the degasser, the heat exchange medium is pumped into the heat exchange circulation pipeline under the drive of the circulation pump, and the heat exchange circulation pipeline returns the heat exchange medium with reduced temperature into the heat absorption circulation 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;
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, wherein 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 provided with a check valve and a first manual valve in sequence, 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 conducted and closed after a set time is delayed, so that heat exchange medium is led 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 conducted, and the heat exchange medium is supplemented into the second pipeline through a fluid supplementing pump through the seventh pipeline, the eighth pipeline, the ninth pipeline and the tenth pipeline;
An isolation valve for isolating heat exchange medium is arranged between the heat exchange circulation pipeline and the heat absorption circulation pipeline,
The heat absorption circulation pipeline comprises a third pipeline for guiding a heat exchange medium into a load and a fourth pipeline for automatically refluxing the heat exchange medium after absorbing heat generated by the load from the load, and the third pipeline is connected with the degasser;
the degassing device comprises an inner pipe and an outer pipe which are axially nested in the vertical direction, the inner pipe is partially embedded into the outer pipe in the vertical direction, a plurality of lateral through holes which are circumferentially arranged at intervals are formed in the bottom of the inner pipe embedded into the outer pipe, a sealing cover is arranged at the bottom of the inner pipe, a circle of side wall protrudes upwards from the edge of the sealing cover, an upper interface connected with a fourth pipeline is formed at the top of the inner pipe, and a lower interface connected with a second pipeline is formed at the bottom of the outer pipe;
The cooling circulation system further comprises a first heat exchange device;
The heat exchange circulation pipeline comprises a fifth pipeline for guiding the heat exchange medium to the first heat exchange device and a sixth pipeline for re-flowing the heat exchange medium subjected to heat exchange treatment from the first heat exchange device, so that the heat exchange medium with reduced temperature is guided to a load connected with the cooling circulation system through the sixth pipeline.
2. The cooling circulation system of claim 1, wherein the top of the liquid storage tank is connected to the top of the degasser by a transparent tube, and the transparent tube is provided with a third manual valve.
3. The cooling circulation system according to claim 1, characterized in that the cooling circulation system further comprises: a liquid adding pipeline for adding a heat exchange medium into the second pipeline;
The liquid adding pipeline comprises a liquid adding pipe and
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 the heat exchange medium is added into the second pipeline for the first time, the first electromagnetic valve and the second electromagnetic valve are in a closed state.
4. The cooling circulation system according to claim 1, characterized in that the cooling circulation system further comprises: an evacuation tube connected to the eighth conduit, the evacuation tube being provided with a fifth manual valve.
5. The cooling circulation system according to claim 1, characterized in that the cooling circulation system further comprises: a twelfth pipe connected to the fifth pipe, a thirteenth pipe connected to the sixth pipe, a fourteenth pipe connected to the twelfth pipe and the thirteenth pipe, and an electric three-way proportional valve; the electric three-way proportional valve is connected into the twelfth pipeline and communicated with the fourteenth pipeline.
6. The cooling circulation system according to claim 1, wherein the first heat exchange device 1 comprises a cooling tower, a tube-in-tube heat exchanger, a shell-and-tube heat exchanger, a positive displacement heat exchanger or a tube heat exchanger.
7. The cooling circulation system according to claim 5, further comprising a second heat exchange device, wherein the twelfth pipe introduces the heat exchange medium to the second heat exchange device, and introduces the heat exchange medium after the temperature reduction to the sixth pipe through the thirteenth pipe through the second heat exchange device;
The second heat exchange device comprises an air heat exchanger, a plate heat exchanger or an electric heating semiconductor refrigerating device.
8. The cooling circulation system of any one of claims 1 to 7, wherein the load comprises a data center, a physical server cluster, or an air conditioning system.
9. The cooling circulation system of claim 8, wherein the preset pressure threshold is 7Bar and the heat exchange medium comprises water or antifreeze coolant.
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| CN204854030U (en) * | 2015-07-01 | 2015-12-09 | 杨宪杰 | Unsaturation reverse cycle formula all -in -one |
| CN111947336A (en) * | 2020-08-24 | 2020-11-17 | 珠海格力电器股份有限公司 | Refrigeration circulating system and control method thereof |
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| KR101766466B1 (en) * | 2016-04-29 | 2017-08-08 | 세연기업 주식회사 | Non-frost high performance air source heatpump system |
| CN209149240U (en) * | 2018-12-12 | 2019-07-23 | 广东合一新材料研究院有限公司 | A kind of server radiating system that contact is cooling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204854030U (en) * | 2015-07-01 | 2015-12-09 | 杨宪杰 | Unsaturation reverse cycle formula all -in -one |
| CN111947336A (en) * | 2020-08-24 | 2020-11-17 | 珠海格力电器股份有限公司 | Refrigeration circulating system and control method thereof |
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