CN111642109B - Fountain rack cooling system - Google Patents
Fountain rack cooling system Download PDFInfo
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- CN111642109B CN111642109B CN202010489391.3A CN202010489391A CN111642109B CN 111642109 B CN111642109 B CN 111642109B CN 202010489391 A CN202010489391 A CN 202010489391A CN 111642109 B CN111642109 B CN 111642109B
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- 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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20318—Condensers
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- 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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/202—Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers
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- 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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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- 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
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20381—Thermal management, e.g. evaporation control
Abstract
The invention discloses a spraying type cabinet heat dissipation system which comprises a spraying phase-change heat absorption module, a liquid storage tank, a precooling module, a liquid circulating pump and insulating cooling liquid, wherein the spraying phase-change heat absorption module, the liquid circulating pump, the liquid storage tank and the precooling module form a phase-change heat dissipation circulation loop, the insulating cooling liquid flows in the phase-change heat dissipation circulation loop, and the spraying phase-change heat absorption module comprises a liquid inlet pipe, a controllable spraying device, a steam condensation module, a liquid recovery module and a liquid backflow header pipe; the steam condensation module is positioned above the server in the cabinet and comprises a steam condensation surface, a cold source channel and a cooling chamber; the functional condensation unit is in a regular hexagon shape, the center of the functional condensation unit is protruded, and the periphery of the functional condensation unit is lower; the invention effectively improves the liquid recovery efficiency; the controllable spraying device, the steam condensation module and the precooling module are integrated in the cabinet in a homogeneous mode, the structure is compact, and modular production is easy.
Description
Technical Field
The invention relates to a cabinet cooling system, in particular to a spraying type cabinet cooling system for a data center.
Background
With the rapid development and deep combination of big data, internet of things and block chain technology, the concentration degree and the overall scale of various data are greatly improved, so that the data center is forced to enlarge the storage scale and improve the communication and calculation capacity so as to meet the processing requirement of mass data. However, with the adoption of a large number of rack-mounted and blade-type servers, the number of devices in a single cabinet and the heating power are increased rapidly, and how to solve the problem of heat dissipation of electronic devices such as servers becomes a key problem to be solved urgently in the industry. On the other hand, with the expansion of the scale of the data center, the energy consumption amount thereof also increases rapidly, the operation cost pressure increases, and in order to improve the competitiveness of the data center after commercialization, IT is necessary to reduce the energy consumption of non-IT equipment such as a heat dissipation system as much as possible on the basis of realizing efficient heat dissipation of the data center, so as to achieve a lower Power Usage efficiency (Power Usage efficiency, a ratio of total energy consumption of the data center to energy consumption of the IT equipment) as much as possible. Therefore, a more efficient heat dissipation method and a more energy-saving cooling technology are urgently needed to be found, and efficient heat dissipation of the data center cabinet under the condition of high heat flux is realized with energy consumption as low as possible.
The cooling technologies adopted by the existing data center mainly include a machine room level air conditioner, a row level air conditioner or a back plate air conditioner cooling technology, a natural cold source cooling technology, a liquid cooling technology, a heat pipe cooling technology and the like. The traditional machine room air conditioner can not meet the heat dissipation requirement of the cabinet under the current situation, and the problem of local hot spots is easy to occur; in the cooling technology of the air conditioner between the machine cabinet rows or the back plate air conditioner, air needs to be cooled firstly, and then heat dissipation of the machine cabinet is realized through convection heat exchange between cold air and a server, so that the defects of low heat exchange efficiency, high cooling energy consumption and low equipment density exist; the natural cold source cooling technology can directly introduce processed low-temperature fresh air or a large amount of low-temperature cold sources existing in nature into a data center to dissipate heat of the cabinet, mechanical refrigeration is omitted, the energy-saving effect is good, but the requirements on the cleanliness and the source stability of the cold sources are high, and meanwhile, the local source taking is greatly limited by regions and cannot be popularized and applied; liquid cooling technology (such as spray cooling oil) has better heat dissipation capability than air conditioning cooling technology, but the heat exchange is carried out by sensible heat, and the improvement of heat transfer capability is limited. The heat pipe cooling technology is a passive heat dissipation technology with a heat pipe as a heat transfer core, heat transfer is carried out in a phase-change heat transfer mode, the efficiency of transferring heat from the inside of the cabinet to the outside environment is greatly improved, energy consumption is avoided, the energy-saving effect is excellent, the heat pipe cooling technology is limited by the condition of indoor and outdoor temperature difference, and when the outdoor temperature is too high, the heat transfer efficiency is obviously reduced.
Aiming at the defects and shortcomings of the prior art, the invention provides a spraying type heat dissipation system based on phase change heat transfer, which is characterized in that firstly, aiming at the heat dissipation requirement of ultrahigh heat flow density, the insulating liquid is sprayed and cooled to the surface of a server, the insulating liquid is evaporated and absorbed to form steam, and then the high-efficiency heat transfer is realized by a method of discharging heat through condensation and heat release; through setting up the accurate spraying system that the direction of spraying and the flow size of spraying all can be adjusted at any time, in time carry out the super little atomizing with liquid and spray to the too high position of local temperature, solve the problem of local focus.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a spraying type cabinet heat dissipation system aiming at the defects and shortcomings of the prior art, wherein cooling insulating liquid is sprayed to the surface of a server, so as to absorb heat and evaporate the cooling insulating liquid into steam, and then the heat generated inside the cabinet is discharged in a condensation module in a condensation heat release mode, so that the heat dissipation requirement of an ultrahigh heat flow density electronic device is met; the problem of overhigh local temperature is solved by adopting an accurate spraying device with any conditions of spraying direction and spraying flow; the spraying heat dissipation device and the cooling device are integrated in the cabinet system, the structure is compact, and the modular production is easy.
In order to solve the problems, the invention adopts the technical scheme that:
the utility model provides a fountain rack cooling system, is including spraying phase transition heat absorption module, liquid storage pot, precooling module, liquid circulating pump and insulating coolant liquid, spraying phase transition heat absorption module, liquid circulating pump, liquid storage pot and precooling module form phase transition heat dissipation circulation circuit, insulating coolant liquid flows its characterized in that in phase transition heat dissipation circulation circuit:
the spraying phase-change heat absorption module comprises a liquid inlet pipe, a controllable spraying device, a steam condensation module, a liquid recovery module and a liquid reflux main pipe; the controllable spraying device and the steam condensation module are integrated into a whole and are connected with the liquid inlet pipe; the liquid recovery module is used for collecting the residual insulating cooling liquid which is not evaporated into steam, then conveying the insulating cooling liquid to the precooling module through the liquid reflux main pipe, and then conveying the insulating cooling liquid to the liquid storage tank;
the controllable spraying device comprises a primary flow divider, a secondary flow divider, a flow regulating valve and rotary nozzles, and the rotary nozzles are uniformly distributed on the condensing surface of the steam condensing module; after passing through the liquid inlet pipe, the insulating cooling liquid passes through the primary shunt and the secondary shunt in sequence and is sprayed onto the server shell through the rotating nozzle;
the steam condensation module is positioned above the server in the cabinet and comprises a steam condensation surface, a cold source channel and a cooling chamber, and a plurality of functional condensation units are arrayed on the condensation surface; the cooling chamber is positioned on the back of the steam condensation surface, and a cold source enters the cooling chamber from a cold source channel;
the functional condensation unit is in a regular hexagon shape, the center of the functional condensation unit is protruded, and the periphery of the functional condensation unit is lower; the spraying channel of the controllable spraying device penetrates through the cooling chamber and then penetrates out of the central protruding area; the substrate of the functional condensation unit is a super-hydrophilic surface, the surface of the central protruding area is directly contacted with steam, and hemispherical micro-particles are covered on the periphery and the edge area to form a super-hydrophobic surface.
The rotary nozzle can change the spraying direction, can also atomize the sprayed liquid in an ultramicro mode, can further improve the distribution uniformity of the liquid sprayed to the surface of the server, reduces the possibility of forming a liquid film on the surface of the server, and ensures excellent cooling effect on the basis of reducing the spraying flow; the spraying phase-change heat absorption module can be arranged on the side surface and the top surface of each server in the cabinet to form an almost fully-enclosed spraying field.
The invention arranges a plurality of functional condensing units on the steam condensing surface, the cooling chamber is arranged on the back of the steam condensing surface, and the cold source enters the cooling chamber from the cold source channel and flows through the steam condensing module. Thus, after the liquid sprayed on the surface of the server absorbs heat and evaporates into steam, the liquid is condensed into liquid drops when meeting the cooling of the steam condensation surface, the liquid drops attached to the surface of the functional protrusion unit are rapidly converged to the central protrusion area and coalesced under the action of gravity and the hydrophilic and hydrophobic surface, the liquid drops slide to the rotary nozzle after forming large liquid drops, the large liquid drops are sprayed to the surface of the server in the cabinet again, the heat absorption and the evaporation are carried out into steam, and the residual liquid which is not evaporated in time continuously descends to the liquid recovery module; the heat released by the steam condensation is absorbed by a cold source in the cooling chamber and then taken out of the cabinet and discharged to the outside.
The liquid recovery module is positioned below the server in the cabinet, is connected with the liquid return pipeline, and has the surface facing upwards to the cabinet server, and is provided with a plurality of functional recovery units with central bulges and lower peripheries in an array manner; the functional recovery unit substrate is a super-hydrophilic surface, the surface of a central protruding area is smooth and uncovered, micro liquid drops in steam can be efficiently captured, hemispherical micro particles cover the surfaces of the peripheral and edge areas to form a super-hydrophobic surface, the sliding speed of the liquid drops to low-lying positions can be promoted, and liquid absorption hole arrays are arranged at the peripheral low-lying positions and used for absorbing liquid; the liquid suction hole array is connected with the liquid reflux branch pipes, and the liquid reflux branch pipes are finally converged to the liquid reflux main pipe; when the insulating cooling working medium sprayed to the surface of the server shell is not completely evaporated, the residual liquid slides to the surface of the liquid recovery module from the surface of the server, a large number of micro liquid drops in the steam are captured by the central protruding area of the functional recovery unit and converged into large liquid drops, then the liquid drops dripped to the surface of the liquid recovery module and the large liquid drops converged under the action of gravity and the hydrophilic and hydrophobic surface quickly move to liquid suction holes located at the peripheral low-lying positions, then the liquid drops are absorbed by the liquid suction holes and enter a liquid backflow branch pipeline, and finally the liquid drops are converged to a liquid backflow main pipe.
The precooling module comprises a precooling channel and a gas-liquid separation chamber, is connected with the liquid reflux header pipe, and is used for collecting the insulating cooling liquid in the phase-change heat dissipation circulation loop and carrying out cooling and precooling on the insulating cooling liquid; and high-temperature liquid recovered from the cabinet server enters the gas-liquid separation chamber through a liquid reflux main pipe, is subjected to heat exchange with a cold source in the precooling channel to form supercooled liquid, and finally enters the liquid storage tank. The liquid storage tank is used for receiving the supercooled liquid from the precooling module and providing working medium compensation for the phase change heat dissipation circulation reflux.
The cooling wall of the cabinet is a shell of the cabinet, and a cold source channel is arranged in the cooling wall and is positioned on the side wall surface of the cabinet. The cold source divide into two the tunnel after introducing from the external world, wherein get into all the way the precooling module, to following the high temperature liquid of retrieving in the rack server cools off, another way gets into the cold source passageway from rack cooling wall one side earlier, and the reposition of redundant personnel extremely the cooling chamber of steam condensation module absorbs the heat that the interior steam condensation of rack emitted, gathers the cold source passageway to lieing in the opposite side rack cooling wall afterwards again, discharges to the external world at last.
The spray type phase change heat dissipation system adopts a gas-liquid two-phase pump driving spray circulation mode, namely, a fluid circulating pump in a phase change heat dissipation circulation loop is started to force a gas-liquid two-phase insulating cooling working medium in a pipeline to circularly flow between a precooling module and a phase change spray module, and the working principle is as follows: the steam generated by the spraying phase change module rises to meet the steam condensation module, is condensed and releases heat to form liquid drops, the condensed and released heat is dripped to the surface of a server after being converted into the liquid drops, the liquid drops continuously absorb heat and evaporate to form the steam, then rises again, the liquid which is not completely evaporated continuously falls to the liquid recovery module, is collected by the liquid recovery module, enters the precooling module through the liquid reflux header pipe under the action of the fluid pump, transfers heat to the precooling module through convection heat transfer, and is finally cooled to form supercooled liquid which enters the liquid storage tank; and the supercooled insulating cooling liquid from the precooling module returns to the spraying phase-change heat absorption module again under the action of the fluid circulating pump and is sprayed to the server shell in the cabinet again.
The invention adopts a spray type phase change cooling mode to replace the traditional air cooling heat dissipation mode and liquid cooling mode, greatly improves the heat dissipation capability, keeps the temperature of the electronic device stable, improves the performance of the electronic device and prolongs the service life; because no high-power fan is arranged, the noise of the cabinet is greatly reduced, the environment of a machine room is optimized, and meanwhile, the power consumption of the cabinet is also reduced.
Advantageous effects
Aiming at the defects and shortcomings of the prior art, the invention provides a spraying type cabinet cooling system, which has the beneficial effects that:
the phase-change spraying module is adopted to absorb heat generated in the data center and discharge the heat to the outside, the spraying direction and the spraying flow are accurately adjustable through the controllable spraying system, spraying liquid drops can be subjected to ultramicro atomization, a large amount of cooling working media are provided for a local overheating area in time, and the problem of heat emission of the local hot spot area is solved; the functional condensation unit on the surface of the steam condensation module and the functional recovery unit on the surface of the liquid recovery module have special protruding structures and surface hydrophilic and hydrophobic properties, so that the detention time of liquid on a non-heat-absorption surface can be effectively reduced, the recovery rate of the liquid is improved, and the operating efficiency of heat dissipation circulation is increased; the controllable spraying device, the steam condensation module and the precooling module are integrated in the cabinet in a homogeneous mode, the structure is compact, and modular production is easy.
Drawings
Fig. 1 is a schematic structural view of a spray type cabinet heat dissipation system according to the present invention;
fig. 2 illustrates a controllable spraying device and a steam condensation module in a spraying cabinet cooling system according to the present invention;
fig. 3 is a surface structure of a steam condensation module in a spray-type cabinet heat dissipation system according to the present invention;
FIG. 4 is an enlarged schematic view of section A of FIG. 3;
FIG. 5 is a surface structure of a liquid recovery module in a spray-type cabinet heat dissipation system according to the present invention;
fig. 6 is an enlarged schematic view of a portion B of fig. 5.
In the figure: 1-spraying a phase change heat absorption module; 2-a cabinet cooling wall; 3-a cold source channel; 4-liquid return header; 5-a precooling module; 6-a gas-liquid separation chamber; 7-a liquid storage tank; 8-a fluid circulation pump; 9-a controllable spraying device; 10-a liquid recovery module; 11-a steam condensation module; 12-a precooler; 13-a liquid inlet pipe; 14-a flow divider; 15-a secondary flow splitter; 16-a flow control valve; 17-a rotating nozzle; 18-a functional condensation unit; 19-liquid recovery manifold; 20-a functional recovery unit; a cooling chamber 21.
Detailed Description
The invention will be further described with reference to the accompanying drawings
The invention relates to a spraying type cabinet heat dissipation system, which comprises a spraying phase-change heat absorption module 1; a cabinet cooling wall 2; a cold source channel 3; a liquid return header 4; a preheating module 5; a gas-liquid separation chamber 6; a liquid storage tank 7; a fluid circulation pump 8; a controllable spraying device 9; a liquid recovery module 10; a steam condensation module 11;
the spraying phase-change heat absorption module 1 comprises a cabinet cooling wall 2, a cold source channel 3, a liquid reflux header pipe 4, a controllable spraying device 9, a liquid recovery module 10 and a steam condensation module 11.
As shown in fig. 1, there are N servers in the cabinet body, correspond to the workspace of each server, and side and top surface all are provided with controllable spray set 9 and steam condensation module 11 for the heat that the condensation releases is absorbed to the insulating cooling working medium that the condensation evaporation becomes steam, and liquid recovery module 10 has been arranged to the below, is used for collecting the insulating cooling liquid that remains unevaporated to become steam, then carries to precooling module 5 through liquid backflow house steward 4, then carries to liquid storage pot 7.
The spray type cabinet heat dissipation system adopts pump drive spray circulation, namely, a fluid circulating pump 8 in a phase change heat dissipation circulation loop is started to force a gas-liquid two-phase insulating cooling working medium in a pipeline to circularly flow between a precooling module 5 and a phase change spray module 1, and the working principle is as follows: steam generated by the spraying phase change module 1 meets the steam condensation module 11, is condensed and releases heat to form liquid drops, then is sprayed to the surface of the server again, continues to absorb heat and evaporate to form steam, liquid which is not completely evaporated continuously descends to the liquid recovery module 10, is collected by the liquid recovery module 10, enters the precooling module 5 through the liquid reflux header pipe 4 under the action of the fluid circulating pump 8, transfers heat to a precooler 12 in the precooling module 5 through convection heat transfer, and is directly cooled and becomes supercooled liquid finally and enters the liquid storage tank 7; after entering the liquid storage tank 7, the supercooled insulating cooling liquid from the precooling module 5 returns to the spraying phase-change heat absorption module 1 again under the action of the fluid circulating pump 8, and is sprayed onto the server shell in the cabinet again.
As shown in fig. 2, the controllable spraying device 9 is integrated with the steam condensation module 11 and connected with the liquid inlet pipe 13; the controllable spraying device 9 comprises a primary flow divider 14, a secondary flow divider 15, a flow regulating valve 16 and a rotary nozzle 17, wherein the rotary nozzle 17 is uniformly distributed on the condensation surface of the steam condensation module 11; after passing through the liquid inlet pipe 13, the insulating cooling liquid passes through the primary shunt 14 and the secondary shunt 15 in sequence, and is sprayed onto the server shell through the rotary nozzle 17, wherein the spraying direction is realized by controlling the direction of the rotary nozzle 17, and the spraying flow is controlled through the flow regulating valve 16; a plurality of temperature sensors are uniformly arranged on the server shell to form the temperature sensor array, and the temperature sensors correspond to the flow regulating valves 16 one by one; thus, when a local hot spot occurs, the obviously raised temperature can be sensed by a plurality of temperature sensors near the area, after the controllable spraying device 9 receives a signal, the spraying direction is changed by rotating the corresponding rotary nozzle 17, the spraying flow is changed by adjusting the corresponding flow control valve 16, so that the area with the local hot spot obtains more spraying liquid, the evaporation heat absorption rate is improved, and the elimination of the local hot spot area is realized; the rotary nozzle 17 can change the spraying direction, can also carry out ultramicro atomization on the sprayed liquid, can further improve the distribution uniformity of the liquid sprayed to the surface of the server, reduces the possibility of forming a liquid film on the surface of the server, and ensures excellent cooling effect on the basis of reducing the spraying flow; the spraying phase-change heat absorption module can be arranged on the side surface and the top surface of each server in the cabinet to form an almost fully-enclosed spraying field.
As shown in fig. 3 and 4, the steam condensation surface of the steam condensation module 11 faces the servers inside the cabinet, and a plurality of functional condensation units 18 are arranged in a surface array; the functional condensation unit 18 is in a regular hexagon shape, the center of the functional condensation unit is protruded, and the periphery of the functional condensation unit is lower; the spray channel of the controllable spray device 9 passes through the cooling chamber and then out of the central protruding area of the functional condensation unit 18; the substrate of the functional condensation unit 18 is a super-hydrophilic surface, the surface of a central protruding area is smooth and uncovered, the functional condensation unit is directly contacted with steam, and hemispherical micro-particles are covered on the periphery and edge areas to form a super-hydrophobic surface; the cooling chamber 21 is located at the back of the steam condensation surface, and the cold source enters the cooling chamber 21 from the cold source channel 3 and flows through the steam condensation module 11. Thus, after the liquid sprayed on the surface of the server absorbs heat and evaporates into steam, the steam and the steam are condensed into liquid drops when meeting cold, under the action of gravity and hydrophilic and hydrophobic surfaces, the liquid drops attached to the surface of the functional protrusion unit 18 are rapidly converged to the central protrusion area and are converged, large liquid drops are formed and then are sprayed on the surface of the server in the cabinet again, the liquid drops absorb heat and evaporate into steam, and the rest liquid drops to the liquid recovery module 10 continuously; the heat released by the steam condensation is absorbed by the cold source and then taken out of the cabinet and discharged to the outside.
As shown in fig. 5 and 6, the liquid recovery module 10 is located below the servers inside the cabinet, and is connected to the liquid return branch pipe 19, and its surface faces upward the cabinet servers, and is arranged with a plurality of central protrusions and lower functional recovery units 20; the substrate of the functional recovery unit 20 is a super-hydrophilic surface, the surface of a central protruding area is smooth and uncovered, micro liquid drops in steam can be efficiently captured, hemispherical micro particles cover the surfaces of the peripheral and edge areas to form a super-hydrophobic surface, the sliding speed of the liquid drops to low-lying positions can be promoted, and liquid absorption hole arrays are arranged at the peripheral low-lying positions and used for absorbing liquid; the liquid suction hole array is connected with a liquid return branch pipe 19, and the liquid return branch pipe 19 is finally converged to a liquid return header pipe 4; when the insulating cooling working medium sprayed on the surface of the server shell is not completely evaporated, the residual liquid slides to the surface of the liquid recovery module 10 from the surface of the server, a large amount of micro liquid drops in the steam are captured by the central protruding area of the functional recovery unit 20 and converged into large liquid drops, then under the action of gravity and the hydrophilic and hydrophobic surface, the liquid drops dripped on the surface of the liquid recovery module 10 and the converged large liquid drops rapidly move to the liquid suction holes in the peripheral low-lying positions, are absorbed by the liquid suction holes and then enter the liquid reflux branch pipeline 19, and finally join the liquid reflux main pipe 4 and enter the pre-cooling module 5.
The foregoing is only a preferred embodiment of the present invention and other useful embodiments are possible. To those skilled in the art, effective modifications based on the present invention should also be considered as within the scope of the present invention.
Claims (2)
1. The utility model provides a fountain rack cooling system, is including spraying phase transition heat absorption module, liquid storage pot, precooling module, liquid circulating pump and insulating coolant liquid, spraying phase transition heat absorption module, liquid circulating pump, liquid storage pot and precooling module form phase transition heat dissipation circulation circuit, insulating coolant liquid flows its characterized in that in phase transition heat dissipation circulation circuit:
the spraying phase-change heat absorption module comprises a liquid inlet pipe, a controllable spraying device, a steam condensation module, a liquid recovery module and a liquid reflux main pipe; the controllable spraying device and the steam condensation module are integrated into a whole and are connected with the liquid inlet pipe; the liquid recovery module is used for collecting the residual insulating cooling liquid which is not evaporated into steam, then conveying the insulating cooling liquid to the precooling module through the liquid reflux main pipe, and then conveying the insulating cooling liquid to the liquid storage tank;
the controllable spraying device comprises a primary flow divider, a secondary flow divider, a flow regulating valve and rotary nozzles, and the rotary nozzles are uniformly distributed on the condensing surface of the steam condensing module; after passing through the liquid inlet pipe, the insulating cooling liquid passes through the primary shunt and the secondary shunt in sequence and is sprayed onto the server shell through the rotating nozzle;
the steam condensation module is positioned above the server in the cabinet and comprises a steam condensation surface, a cold source channel and a cooling chamber, and a plurality of functional condensation units are arrayed on the condensation surface; the cooling chamber is positioned on the back of the steam condensation surface, and a cold source enters the cooling chamber from a cold source channel;
the functional condensation unit is in a regular hexagon shape, the center of the functional condensation unit is protruded, and the periphery of the functional condensation unit is lower; the spraying channel of the controllable spraying device penetrates through the cooling chamber and then penetrates out of the central protruding area; the functional condensation unit substrate is a super-hydrophilic surface, the surface of a central protruding area is directly contacted with steam, and hemispherical micro-particles are covered on the periphery and edge areas to form a super-hydrophobic surface;
the liquid recovery module is positioned below the server in the cabinet and connected with the liquid reflux branch pipe; the liquid recovery module is provided with a plurality of functional recovery units with central bulges and lower peripheries in an array manner on the surface facing the cabinet server; the substrate of the functional recovery unit is a super-hydrophilic surface, and hemispherical micro-particles are covered on the periphery of the central protruding area and the surface of the edge area to form a super-hydrophobic surface;
the controllable spraying device also comprises temperature sensors which correspond to the flow regulating valves one by one, and the controllable spraying device realizes the control of the spraying direction and the spraying flow by adjusting the direction of the rotary nozzle and the opening degree of the flow regulating valve according to temperature signals sent by the temperature sensors; the controllable spraying device also controls the spray nozzle to carry out ultramicro atomization on the spraying liquid according to the temperature signal detected by the temperature sensor, so that the problem of local hot spots is eliminated in time.
2. The spray-type cabinet heat dissipation system of claim 1, wherein: a liquid absorption hole array is arranged at a low-lying position around a central protruding area of the functional recovery unit and is used for absorbing liquid; the liquid suction hole array is connected with the liquid backflow branch pipe, and the liquid backflow branch pipe is finally converged to the liquid backflow header pipe.
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| CN202010489391.3A CN111642109B (en) | 2020-06-02 | 2020-06-02 | Fountain rack cooling system |
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| CN202010489391.3A CN111642109B (en) | 2020-06-02 | 2020-06-02 | Fountain rack cooling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112839490B (en) * | 2021-01-25 | 2022-07-01 | 东南大学 | Two-phase flow active and passive multi-level data center cabinet heat dissipation device and method |
| CN115413183A (en) * | 2021-05-28 | 2022-11-29 | 华为云计算技术有限公司 | Server and cabinet |
| CN113365478A (en) * | 2021-06-22 | 2021-09-07 | 中国联合网络通信集团有限公司 | Cooling device and cluster router |
| CN113271755B (en) * | 2021-07-19 | 2021-10-01 | 深圳比特微电子科技有限公司 | Single-phase immersion type liquid cooling cabinet |
| CN114816014B (en) * | 2022-06-01 | 2024-02-02 | 兰洋(宁波)科技有限公司 | Self-adaptive multi-mode cooling system |
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