CN117979633A - Cooling device for server and control method of cooling device - Google Patents
Cooling device for server and control method of cooling device Download PDFInfo
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- CN117979633A CN117979633A CN202311834667.7A CN202311834667A CN117979633A CN 117979633 A CN117979633 A CN 117979633A CN 202311834667 A CN202311834667 A CN 202311834667A CN 117979633 A CN117979633 A CN 117979633A
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- 238000001816 cooling Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003507 refrigerant Substances 0.000 claims abstract description 168
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 35
- 238000004891 communication Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000004907 flux Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20809—Liquid cooling with phase change within server blades for removing heat from heat source
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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
- H05K7/20709—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
- H05K7/20772—Liquid cooling without phase change within server blades for removing heat from heat source
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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
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
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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)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a cooling device and a control method for a server, wherein the cooling device comprises a rack, a cold plate and a first heat exchanger, and the cold plate and a heating element are arranged in a contact manner; the refrigerant A flow path of the cold plate comprises a cold plate A1 port and a cold plate A2 port, and the refrigerant B flow path of the first heat exchanger comprises a heat exchanger B1 port and a heat exchanger B2 port; a first branch pipeline and a second branch pipeline are arranged in parallel between the port A1 of the cold plate and the port B1 of the heat exchanger; the first branch pipeline is provided with a compressor, and the second branch pipeline is provided with a pump; a third pipeline and a fourth pipeline are arranged in parallel between the port A2 of the cold plate and the port B2 of the heat exchanger, a throttling device is arranged in the third pipeline, and a one-way valve is arranged in the fourth pipeline; the cold plate, the first branch pipeline, the first heat exchanger and the third branch pipeline are sequentially communicated to form a first circulating flow path, and the cold plate, the second branch pipeline, the first heat exchanger and the fourth branch pipeline are sequentially communicated to form a second circulating flow path; the circulation flow path is preferable, so that the power consumption of the cooling device is reduced, and the heat dissipation efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of cooling, and particularly relates to a cooling device for a server and a control method of the cooling device.
Background
The internet data center plays a vital role in globalization and informatization development process, and is an important infrastructure of industries such as telecommunication, internet and finance. The main stream cooling mode of the traditional server is mainly air cooling, but with the increase of the calculated amount and complexity of a data center and the increase of the demands of society on high-density and ultra-high-density data centers, the air cooling gradually cannot meet the heat dissipation demands of the server;
in recent years, the liquid cooling technology is beginning to be applied to heat dissipation of a data center, and because the specific heat capacity of a refrigerant is higher than that of air, accurate heat dissipation can be realized on a heating element, and the adoption of liquid cooling heat dissipation has become a trend of heat dissipation of a data center server. In the existing cooling device, due to unreasonable structural design and single cooling flow path, the heat exchange efficiency is low, the power consumption is high, and different cooling requirements cannot be met.
Disclosure of Invention
In view of the above, the present invention provides a cooling device for a server and a control method of the cooling device, so as to solve the problems of low heat exchange efficiency, large power consumption, and failure to meet different cooling requirements caused by unreasonable structural design of the cooling device and single cooling flow path in the prior art.
The invention provides a cooling device for a server, wherein the server comprises a heating element; the cooling device comprises a rack and a refrigerant system; an installation cavity is formed in the rack and is used for setting the server;
The refrigerant system comprises a first heat exchanger and a cold plate, wherein one or more cold plates are arranged, and one or more cold plates are used for forming heat conduction relation with the heating elements in a one-to-one correspondence manner; when a plurality of cold plates are arranged, the plurality of cold plates are arranged in parallel; a refrigerant A flow path is formed in the cold plate, the refrigerant A flow path comprises a cold plate A1 port and a cold plate A2 port, and the cold plate A1 port and the cold plate A2 port are used for flowing in and out of the refrigerant;
A refrigerant B flow path and a natural cold source flow path which have heat exchange relation are formed in the first heat exchanger; the refrigerant B flow path comprises a heat exchanger B1 port and a heat exchanger B2 port, and the heat exchanger B1 port and the heat exchanger B2 port are used for flowing in and out refrigerant; the natural cold source flow path comprises a heat exchanger B3 port and a heat exchanger B4 port, and the heat exchanger B3 port and the heat exchanger B4 port are used for flowing in and out of a natural cold source;
A first branch pipeline and a second branch pipeline are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor is arranged in the first branch pipeline, and a pump is arranged in the second branch pipeline; a third pipeline and a fourth pipeline are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port, a throttling device is arranged in the third pipeline, and a one-way valve is arranged in the fourth pipeline; the check valve only allows refrigerant to flow from the cold plate to the first heat exchanger;
The first branch pipeline, the second branch pipeline, the third branch pipeline and the fourth branch pipeline can be controlled to be communicated or disconnected, so that the cold plate, the first branch pipeline, the first heat exchanger and the third branch pipeline are sequentially communicated to form a first circulation flow path, or the cold plate, the second branch pipeline, the first heat exchanger and the fourth branch pipeline are sequentially communicated to form a second circulation flow path.
Further optionally, a first control valve is further arranged in the first branch pipeline, the first control valve and the compressor are arranged in series, and the first control valve is positioned on the refrigerant side of the compressor; the first control valve can be controlled to connect or disconnect the first branch pipeline;
the second branch pipeline is also provided with a second control valve and a liquid storage tank, the second control valve, the pump and the liquid storage tank are sequentially connected in series, the second control valve is positioned at the refrigerant outlet side of the pump, and the liquid storage tank is positioned at the binary refrigerant side of the pump; the second control valve may be controlled to connect or disconnect the second branch line.
Further optionally, the refrigerant system further comprises a second heat exchanger disposed on a back plate of the rack and configured to be disposed on an air intake side of the server; the second heat exchanger and the cold plate are arranged in parallel, and a refrigerant C flow path is formed in the second heat exchanger; the refrigerant C flow path comprises a heat exchanger C1 port and a heat exchanger C2 port, and the heat exchanger C1 port and the heat exchanger C2 port are used for flowing in and out refrigerant;
the air on the air inlet side of the server can exchange heat with the refrigerant flowing through the second heat exchanger, and then enters the rack to exchange heat with the heating element.
Further alternatively, the first control valve is a three-way valve, and the first control valve includes a control valve D1 port and a control valve D2 port and a control valve D3 port; the control valve D1 is communicated with the cold plate A1, and the control valve D2 is communicated with the binary refrigerant of the compressor;
A fifth pipeline is communicated with the port of the heat exchanger C1 and the port of the cold plate A2, and a sixth pipeline is communicated with the port of the heat exchanger C2 and the port of the control valve D3; the sixth branch pipeline, the first heat exchanger, the third branch pipeline, the fifth branch pipeline and the second heat exchanger can be communicated to form a third circulation flow path.
Further alternatively, when the refrigerant flows through the first circulation flow path, the refrigerant flows out of the refrigerant a flow path through the cold plate A1 port, flows through the compressor, enters the refrigerant B flow path through the heat exchanger B1 port, flows out of the refrigerant B flow path through the heat exchanger B2 port, flows through the throttling device, and enters the refrigerant a flow path through the cold plate A2 port;
When the refrigerant flows through the second circulation flow path, the refrigerant flows out of the refrigerant A flow path through the cold plate A2, flows through the one-way valve, enters the refrigerant B flow path through the heat exchanger B2, flows out of the refrigerant B flow path through the heat exchanger B1, flows through the liquid storage tank and the pump, and enters the refrigerant A flow path through the cold plate A1.
Further alternatively, the pressure of the refrigerant in the first and second circulation flow paths is lower than atmospheric pressure; and/or the refrigerant is a non-conductive fluorinated liquid.
Further alternatively, the first control valve and the second control valve are configured to:
when the temperature of the environment where the cooling device is located is higher than or equal to a preset temperature, the first control valve is in an open state, the second control valve is in a closed state, and the refrigerant can flow through the first circulation flow path;
When the temperature of the environment where the cooling device is located is lower than the preset temperature, the first control valve is in a closed state, the second control valve is in an open state, and the refrigerant can flow through the second circulation flow path.
The invention also provides a control method of the cooling device, wherein the cooling device is used for the server; the control method comprises the following steps:
acquiring the current temperature of the environment where the cooling device is positioned;
Determining a target circulation flow path according to the current temperature;
Controlling the target circulation flow path to communicate and allow a refrigerant to flow through the target circulation flow path;
wherein the target circulation flow path is the first circulation flow path or the second circulation flow path.
Further optionally, the determining a target circulation flow path according to the current temperature includes:
Comparing the current temperature with a preset temperature;
When the current temperature is higher than or equal to the preset temperature, determining the target circulation flow path as the first circulation flow path;
and when the current temperature is lower than the preset temperature, determining the target circulation flow path as the second circulation flow path.
Further optionally, the controlling the target circulation flow path communication includes:
when the target circulation flow path is the first circulation flow path, the first branch pipeline and the third branch pipeline are controlled to be communicated, the second branch pipeline and the fourth branch pipeline are controlled to be disconnected, and the compressor is controlled to run;
When the target circulation flow path is the second circulation flow path, the second branch pipeline and the fourth branch pipeline are controlled to be communicated, the first branch pipeline and the third branch pipeline are controlled to be disconnected, and the pump is controlled to run.
Further optionally, the control method further includes:
acquiring the current pressure of the refrigerant in the second circulation flow path when the pump is in an operating state;
Comparing the current pressure with an atmospheric pressure;
and when the current pressure is greater than or equal to the atmospheric pressure, controlling the pump to stop running, and controlling the second branch pipeline and the fourth branch pipeline to be disconnected.
Compared with the prior art, the invention has the following main beneficial effects:
The device is provided with a first circulation flow path and a second circulation flow path, wherein a compressor is arranged in the first circulation flow path, and a pump is arranged in the second circulation flow path; when the ambient temperature is lower, the low-temperature water or low-temperature air in the environment is fully utilized to exchange heat with the refrigerant, and then the refrigerant is input into the cold plate through the pump to dissipate heat of the heating element, so that the power consumption of the cooling device is reduced; when the ambient temperature is higher, the refrigerant dissipates heat to the heating element through the action of the compressor, so that the heat dissipation efficiency is high, and the heat dissipation requirement of the high heat flux server can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic diagram of an assembled structure of a cooling device and a server embodiment provided by the present invention;
FIG. 2 is a schematic flow chart of an embodiment of a control method of a cooling device according to the present invention;
In the figure:
11-a first heat exchanger; 12-a second heat exchanger; 13-a cold plate;
21-a first branch line; 22-a first control valve; a 23-compressor;
31-a second branch line; 32-a second control valve; 33-a pump; 34-a liquid storage tank; 35-a pressure sensor;
41-a third branch pipeline; 42-throttle device;
51-fourth branch pipeline; 52-a one-way valve;
61-a frame; 611-mounting cavity; 62-a server; 621-heating element.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
In the existing cooling device, due to unreasonable structural design and single cooling flow path, the heat exchange efficiency is low, the power consumption is high, and different cooling requirements cannot be met;
The present invention creatively provides a cooling device for a server including a heating element; the cooling device comprises a rack and a refrigerant system; an installation cavity for setting a server is formed in the rack;
The refrigerant system includes a first heat exchanger and a cold plate in heat transfer relationship with a heating element; a refrigerant A flow path is formed in the cold plate, and comprises a cold plate A1 port and a cold plate A2 port; a refrigerant B flow path and a natural cold source flow path which have heat exchange relation are formed in the first heat exchanger; the refrigerant B flow path comprises a heat exchanger B1 port and a heat exchanger B2 port, and the natural cold source flow path can flow through the natural cold source; a first branch pipeline and a second branch pipeline are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; the first branch pipeline is provided with a compressor, and the second branch pipeline is provided with a pump; a third pipeline and a fourth pipeline are arranged in parallel between the port A2 of the cold plate and the port B2 of the heat exchanger; a throttling device is arranged in the third pipeline, and a one-way valve is arranged in the fourth pipeline;
The cold plate, the first branch pipeline, the first heat exchanger and the third branch pipeline can form a first circulation flow path when being communicated in sequence, and the cold plate, the second branch pipeline, the first heat exchanger and the fourth branch pipeline can form a second circulation flow path when being communicated in sequence;
When the ambient temperature is low, the low-temperature water or low-temperature air in the environment is fully utilized to exchange heat with the refrigerant, so that the power consumption of the cooling device is reduced; when the ambient temperature is higher, the refrigerant dissipates heat to the heating element through the action of the compressor, and the heat dissipation efficiency is high.
< Cooling device >
As shown in fig. 1, the present embodiment provides a cooling device for a server, the server 62 including a heat generating element 621; the cooling device comprises a frame 61 and a refrigerant system; the frame 61 is internally formed with a mounting cavity 611, and the mounting cavity 611 is used for setting the server 62; preferably, the server 62 is a high heat flux server 62; specifically, there are a plurality of installation cavities 611, and each installation cavity 611 may be provided with one server 62;
The refrigerant system includes a first heat exchanger 11 and a cold plate 13, the cold plate 13 being provided with one or more cold plates 13 for forming a heat transfer relationship with the heat generating elements 621 in a one-to-one correspondence; when a plurality of cold plates are provided, the plurality of cold plates 13 are arranged in parallel; preferably, the cold plate 13 is arranged to contact the heating element 621; the inside of the cold plate 13 forms a refrigerant a flow path including a cold plate A1 port and a cold plate A2 port for flowing in and out a refrigerant;
a refrigerant B flow path and a natural cold source flow path which have heat exchange relation are formed in the first heat exchanger 11; the refrigerant B flow path comprises a heat exchanger B1 port and a heat exchanger B2 port, and the heat exchanger B1 port and the heat exchanger B2 port are used for flowing in and out the refrigerant; the natural cold source flow path comprises a heat exchanger B3 port and a heat exchanger B4 port, and the heat exchanger B3 port and the heat exchanger B4 port are used for flowing in and out of the natural cold source; preferably, the first heat exchanger 11 is a plate heat exchanger, and the natural cooling source flow path may flow through a natural cooling source for heat exchange with a refrigerant, the natural cooling source including water or air in an environment where the cooling device is located.
A first branch pipeline 21 and a second branch pipeline 31 are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; the first branch pipe 21 is provided with a compressor 23, and the second branch pipe 31 is provided with a pump 33; a third branch pipeline 41 and a fourth branch pipeline 51 are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port; a throttle device 42 is arranged in the third pipeline 41, and preferably, the throttle device 42 is a throttle valve; a check valve 52 is arranged in the fourth pipeline 51; the check valve 52 allows only the refrigerant to flow from the cold plate 13 to the first heat exchanger 11; specifically, the refrigerant flowing out through the cold plate 13 may enter the first heat exchanger 11 through the check valve 52, and the refrigerant flowing out through the first heat exchanger 11 may not enter the cold plate 13 through the check valve 52;
The first branch pipeline 21 and the second branch pipeline 31 can be controlled to be communicated or disconnected, so that a first circulation flow path is formed by sequentially communicating the cold plate 13, the first branch pipeline 21, the first heat exchanger 11 and the third branch pipeline 41, or a second circulation flow path is formed by sequentially communicating the cold plate 13, the second branch pipeline 31, the first heat exchanger 11 and the fourth branch pipeline 51; specifically, when the first branch pipe 21 is communicated and the second branch pipe 31 is disconnected, the cold plate 13, the first branch pipe 21, the first heat exchanger 11, and the third branch pipe 41 may be sequentially communicated to form a first circulation flow path; when the second branch pipe 31 is connected and the first branch pipe 21 is disconnected, the cold plate 13, the second branch pipe 31, the first heat exchanger 11 and the fourth branch pipe 51 may be sequentially connected to form a second circulation flow path;
The first circulation flow path and the second circulation flow path are independent circulation flow paths, and liquid refrigerant enters the cold plate 13; in the cold plate 13, the liquid refrigerant is changed into a gaseous refrigerant and absorbs the heat of the heating element 621, so that the heat exchange efficiency is high, and the heat dissipation requirement of high heat flux service can be met;
When the ambient temperature is low, the low-temperature water or low-temperature air in the environment is fully utilized to exchange heat with the refrigerant, and then the refrigerant is input into the cold plate 13 through the pump 33 to dissipate heat of the heating element 621, so that the power consumption of the cooling device is reduced; when the ambient temperature is high, the compressor 23 acts to dissipate heat from the heating element 621 by the refrigerant, so that the heat dissipation efficiency is high, and the heat dissipation requirement of the high heat flux server 62 can be met.
In order to solve the problem that the server 62 is damaged due to leakage of the refrigerant through the circulation flow path, the present embodiment proposes that the pressure of the refrigerant in the first circulation flow path and the second circulation flow path is lower than the atmospheric pressure; when a leakage point exists in the circulation flow path, the refrigerant in the circulation flow path is lower than the atmospheric pressure, so that the refrigerant cannot flow out through the leakage point in a short time;
Further, the refrigerant is a non-conductive fluorinated liquid; when the pressure of the refrigerant in the circulation flow path is equal to or greater than the atmospheric pressure, the refrigerant drops on the server 62 through leakage, and since the refrigerant is not conductive, the server 62 is not damaged, and the reliability of the cooling device is improved.
Aiming at the problem that the connection or disconnection of the first branch pipeline 21 and the second branch pipeline 31 cannot be controlled in time, the embodiment provides that a first control valve 22 is further arranged in the first branch pipeline 21, the first control valve 22 and the compressor 23 are arranged in series, the first control valve 22 is positioned on the binary refrigerant side of the compressor 23, and the first control valve 22 can be controlled to enable the first branch pipeline 21 to be connected or disconnected;
The second branch pipeline 31 is also provided with a second control valve 32 and a liquid storage tank 34, the second control valve 32, the pump 33 and the liquid storage tank 34 are sequentially connected in series, the second control valve 32 is positioned on the refrigerant outlet side of the pump 33, and the second control valve 32 can be controlled to enable the second branch pipeline 31 to be connected or disconnected; the liquid storage tank 34 is positioned on the binary refrigerant side of the pump 33, and a pressure sensor 35 is arranged on the liquid storage tank 34 and used for detecting the pressure in the liquid storage tank 34;
wherein the maximum flow area of the first control valve 22 is smaller than the maximum flow area of the second control valve 32.
The first control valve 22 and the second control valve 32 are both solenoid valves; the cooling device further comprises a controller, and the pressure sensor 35, the pump 33, the compressor 23, the first control valve 22 and the second control valve 32 are all electrically connected with the controller; the controller can control the first control valve 22 and the second control valve 32 according to the pressure signal transmitted by the pressure sensor 35, so that the corresponding circulation flow paths are communicated, and the pump 33 or the compressor 23 is controlled to operate, so that the refrigerant circularly flows in the corresponding circulation flow paths, and the heat dissipation of the heating element 621 is realized;
the first control valve 22 and the second control valve 32 are provided as:
when the temperature of the environment where the cooling device is located is higher than or equal to the preset temperature, the first control valve 22 is in an open state and the second control valve 32 is in a closed state, and the refrigerant can flow through the first circulation flow path;
when the temperature of the environment in which the cooling device is located is lower than the preset temperature, the first control valve 22 is in a closed state and the second control valve 32 is in an open state, and the refrigerant can flow through the second circulation flow path.
The flow direction of the refrigerant in the first circulation flow path and the second circulation flow path is different; when the refrigerant flows through the first circulation flow path, the refrigerant flows out through the cold plate 13, then flows through the compressor 23 and the first heat exchanger 11 in sequence, and then enters the cold plate 13; when the refrigerant flows through the second circulation flow path, the refrigerant flows out through the cold plate 13, flows through the first heat exchanger 11 and the pump 33 in sequence, and then enters the cold plate 13;
Specifically, when the refrigerant flows through the first circulation flow path, the refrigerant flows out of the refrigerant a flow path through the opening A1 of the cold plate, flows through the compressor 23, enters the refrigerant B flow path through the opening B1 of the heat exchanger, flows out of the refrigerant B flow path through the opening B2 of the heat exchanger, flows through the throttling device 42, and enters the refrigerant a flow path through the opening A2 of the cold plate;
When the refrigerant flows through the second circulation flow path, the refrigerant flows out of the refrigerant A flow path through the opening A2 of the cold plate, flows through the check valve 52, enters the refrigerant B flow path through the opening B2 of the heat exchanger, flows out of the refrigerant B flow path through the opening B1 of the heat exchanger, flows through the liquid storage tank 34 and the pump 33, and enters the refrigerant A flow path through the opening A1 of the cold plate.
Aiming at the problem that the heat dissipation efficiency of the heating element 621 is low due to the fact that the compressor 23 is used for refrigerating the refrigerant when the ambient temperature is high, the embodiment provides that the refrigerant system further comprises a second heat exchanger 12, and the second heat exchanger 12 is arranged on the back plate of the rack 61 and is used for being arranged on the air inlet side of the server 62; the second heat exchanger 12 and the cold plate 13 are arranged in parallel; a refrigerant C flow path is formed inside the second heat exchanger 12, the refrigerant C flow path including a heat exchanger C1 port and a heat exchanger C2 port, the heat exchanger C1 port and the heat exchanger C2 port being for flowing in and out a refrigerant;
The air on the air intake side of the server 62 may exchange heat with the refrigerant flowing through the second heat exchanger 12 and then enter the housing 61 to exchange heat with the heating element 621.
Further, the first control valve 22 is a three-way valve, and the first control valve 22 is formed with a control valve D1 port and a control valve D2 port and a control valve D3 port; the control valve D1 is communicated with the cold plate A1, and the control valve D2 is communicated with the binary refrigerant port of the compressor 23;
The port of the heat exchanger C1 is communicated with the port of the cold plate A2, and the port of the heat exchanger C2 is communicated with the port of the control valve D3, and a sixth pipeline is arranged; the sixth branch pipe, the first heat exchanger 11, the third branch pipe, the fifth branch pipe, and the second heat exchanger 12 may be connected to form a third circulation flow path, and the air on the air intake side of the server 62 may be cooled when the refrigerant circulates in the third circulation flow path.
When the ambient temperature is low, in order to fully utilize the natural cold source, low-temperature water or low-temperature air for cooling the refrigerant is obtained from the environment, and meanwhile, the energy consumption of the cooling device is reduced, and the starting time of the compressor 23 is reduced as much as possible; at this time, the second control valve 32 is controlled to be opened, the first control valve 22 is controlled to be closed, the second branch pipe 31 is communicated and the first branch pipe 21 is disconnected, and the pump 33 is controlled to operate and the compressor 23 is controlled to stop operating; the liquid refrigerant is driven by the pump 33 to enter the cold plate 13 through the second control valve 32, the refrigerant is changed from a liquid state to a gas state in the cold plate 13 and cools the heating element 621, the gas refrigerant enters the first heat exchanger 11 after passing through the check valve 52, the gas refrigerant is cooled by low-temperature water in the first heat exchanger 11 and is changed from the gas state to the liquid state and enters the liquid storage tank 34, and the liquid refrigerant enters the pump 33; the pressure sensor 35 monitors the pressure of the refrigerant in the liquid storage tank 34 in real time, and if the pressure of the refrigerant is greater than or equal to the atmospheric pressure, the first control valve 22 and the second control valve 32 are controlled to be closed, so that the first branch pipeline 21 and the second branch pipeline 31 are disconnected, and overhaul is performed;
When the ambient temperature is high, the efficiency of cooling the gaseous refrigerant into the liquid refrigerant by the natural cold source is low; at this time, the first control valve 22 is controlled to be opened, the second control valve 32 is controlled to be closed, the first branch pipeline 21 is communicated, the second branch pipeline 31 is disconnected, and the operation of the compressor 23 and the operation of the pump 33 are controlled to be stopped; the gaseous refrigerant enters the compressor 23 through the first control valve 22, the compressed gaseous refrigerant passing through the compressor 23 becomes high-temperature high-pressure gaseous refrigerant, then enters the first heat exchanger 11, the high-temperature high-pressure gaseous refrigerant is cooled by water with higher temperature obtained from the environment in the first heat exchanger 11 to become high-pressure liquid refrigerant, and the high-pressure liquid refrigerant passes through the throttling device 42 to become low-temperature gas-liquid two-phase refrigerant and then is divided into two paths; a part of the gas-liquid two-phase refrigerant enters the cold plate 13 to absorb heat, the heating element 621 is cooled, and after the heat is absorbed, the refrigerant is changed into a gaseous refrigerant again and enters the compressor 23 through the first control valve 22; the other part of the gas-liquid two-phase refrigerant enters the second heat exchanger 12 through the fifth branch pipeline to be evaporated, exchanges heat with the air at the air inlet side of the server 62, reduces the air temperature at the air inlet side of the server 62, can take away part of heat of the server 62 when the low-temperature air flows through the server 62, and is beneficial to alleviating the problem of insufficient heat dissipation capacity of the cold plate 13 under the condition of high power consumption of the server 62; the gaseous refrigerant flowing out of the second heat exchanger 12 enters the first control valve 22 via the sixth branch line and re-enters the compressor 23.
The first control valve 22, the compressor 23, the second control valve 32, the pump 33, the liquid tank 34, the pressure sensor 35 and the first heat exchanger 11 in the refrigerant system are all disposed at the bottom inside the housing 61, specifically, below the server 62.
< Control method >
As shown in fig. 2, the present embodiment provides a control method of a cooling device, where the cooling device is any one of the cooling devices for a server; the control method comprises the following steps:
S1, acquiring the current temperature of the environment where the cooling device is located;
s2, determining a target circulation flow path according to the current temperature;
S3, controlling the communication of the target circulation flow path, and enabling the refrigerant to flow through the target circulation flow path;
Wherein the target circulation flow path is a first circulation flow path or a second circulation flow path.
Further, S2 includes:
Comparing the current temperature with a preset temperature;
When the current temperature is higher than or equal to the preset temperature, determining the target circulation flow path as a first circulation flow path;
and when the current temperature is lower than the preset temperature, determining the target circulation flow path as a second circulation flow path.
S3 comprises the following steps:
When the target circulation flow path is the first circulation flow path, the first branch pipeline 21 is controlled to be communicated, the second branch pipeline 31 is controlled to be disconnected, and the compressor 23 is controlled to operate; i.e., controls the first control valve 22 to open and controls the second control valve 32 to close; the refrigerant is allowed to circulate in the first circulation flow path and the third circulation flow path, thereby radiating heat from the heat generating element 621;
When the target circulation flow path is the second circulation flow path, the second branch pipeline 31 is controlled to be communicated, the first branch pipeline 21 is controlled to be disconnected, and the pump 33 is controlled to operate; i.e., the second control valve 32 is controlled to be connected and the first control valve 22 is controlled to be disconnected; the refrigerant is allowed to circulate in the second circulation flow path, thereby radiating heat from the heat generating element 621.
In addition, the control method further comprises the following steps:
Acquiring the current pressure of the refrigerant in the second circulation flow path while the pump 33 is in the operation state;
Comparing the current pressure with the atmospheric pressure;
When the front pressure is greater than or equal to the atmospheric pressure, the control pump 33 stops operating, and the second branch pipe 31 is controlled to be disconnected.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
1. A cooling device for a server, the server (62) comprising a heating element (621); characterized in that the cooling device comprises a frame (61) and a refrigerant system; a mounting cavity (611) is formed in the rack (61), and the mounting cavity (611) is used for arranging the server (62);
The refrigerant system comprises a first heat exchanger (11) and a cold plate (13), wherein one or more cold plates (13) are arranged, and one or more cold plates (13) are used for forming heat conduction relation with the heating elements (621) in a one-to-one correspondence manner; when a plurality of cold plates (13) are arranged, the plurality of cold plates (13) are arranged in parallel; a refrigerant A flow path is formed in the cold plate (13), the refrigerant A flow path comprises a cold plate A1 port and a cold plate A2 port, and the cold plate A1 port and the cold plate A2 port are used for flowing in and out of the refrigerant;
a refrigerant B flow path and a natural cold source flow path which have heat exchange relation are formed in the first heat exchanger (11); the refrigerant B flow path comprises a heat exchanger B1 port and a heat exchanger B2 port, and the heat exchanger B1 port and the heat exchanger B2 port are used for flowing in and out refrigerant; the natural cold source flow path comprises a heat exchanger B3 port and a heat exchanger B4 port, and the heat exchanger B3 port and the heat exchanger B4 port are used for flowing in and out of a natural cold source;
A first branch pipeline (21) and a second branch pipeline (31) are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor (23) is arranged in the first branch pipeline (21), and a pump (33) is arranged in the second branch pipeline (31); a third pipeline (41) and a fourth pipeline (51) are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port, a throttling device (42) is arranged in the third pipeline (41), and a one-way valve (52) is arranged in the fourth pipeline (51); -said non-return valve (52) allowing only the flow of refrigerant from said cold plate (13) to said first heat exchanger (11);
The first branch pipeline (21) and the second branch pipeline (31) can be controlled to be communicated or disconnected, so that the cold plate (13), the first branch pipeline (21), the first heat exchanger (11) and the third branch pipeline (41) are sequentially communicated to form a first circulation flow path, or the cold plate (13), the second branch pipeline (31), the first heat exchanger (11) and the fourth branch pipeline (51) are sequentially communicated to form a second circulation flow path.
2. The cooling device for servers according to claim 1, characterized in that a first control valve (22) is also provided in the first branch line (21), the first control valve (22) and the compressor (23) being arranged in series, and the first control valve (22) being located on the refrigerant side of the compressor (23); the first control valve (22) can be controlled to connect or disconnect the first branch pipeline (21);
A second control valve (32) and a liquid storage tank (34) are further arranged in the second branch pipeline (31), the second control valve (32), the pump (33) and the liquid storage tank (34) are sequentially connected in series, the second control valve (32) is positioned on the refrigerant outlet side of the pump (33), and the liquid storage tank (34) is positioned on the binary refrigerant side of the pump (33); the second control valve (32) can be controlled to connect or disconnect the second branch pipe (31).
3. A cooling device for a server according to claim 2, characterized in that the refrigerant system further comprises a second heat exchanger (12), which second heat exchanger (12) is arranged on a back plate of the rack (61) for being arranged on an air intake side of the server (62); the second heat exchanger (12) and the cold plate (13) are arranged in parallel, and a refrigerant C flow path is formed in the second heat exchanger (12); the refrigerant C flow path comprises a heat exchanger C1 port and a heat exchanger C2 port, and the heat exchanger C1 port and the heat exchanger C2 port are used for flowing in and out refrigerant;
air on the air inlet side of the server (62) can exchange heat with the refrigerant flowing through the second heat exchanger (12), and then enters the rack (61) to exchange heat with the heating element (621).
4. A cooling device for a server according to claim 3, characterized in that the first control valve (22) is a three-way valve and the first control valve (22) comprises a control valve D1 port and a control valve D2 port and a control valve D3 port; the control valve D1 is communicated with the cold plate A1, and the control valve D2 is communicated with the binary refrigerant port of the compressor (23);
A fifth pipeline is communicated with the port of the heat exchanger C1 and the port of the cold plate A2, and a sixth pipeline is communicated with the port of the heat exchanger C2 and the port of the control valve D3; the sixth branch pipeline, the first heat exchanger, the third branch pipeline, the fifth branch pipeline and the second heat exchanger can be communicated to form a third circulation flow path.
5. A cooling device for a server according to claim 2, wherein when refrigerant flows through the first circulation flow path, refrigerant flows out of the refrigerant a flow path through the cold plate A1 port, flows through the compressor (23) and into the refrigerant B flow path through the heat exchanger B1 port, flows out of the refrigerant B flow path through the heat exchanger B2 port, flows through the throttle device (42), and flows into the refrigerant a flow path through the cold plate A2 port;
When the refrigerant flows through the second circulation flow path, the refrigerant flows out of the refrigerant A flow path through the cold plate A2 port, flows through the one-way valve (52) and enters the refrigerant B flow path through the heat exchanger B2 port, flows out of the refrigerant B flow path through the heat exchanger B1 port, flows through the liquid storage tank (34) and the pump (33), and enters the refrigerant A flow path through the cold plate A1 port.
6. The cooling apparatus for a server according to claim 5, wherein a pressure of the refrigerant in the first circulation flow path and the second circulation flow path is lower than an atmospheric pressure; and/or the refrigerant is a non-conductive fluorinated liquid.
7. The cooling device for a server according to claim 5, characterized in that the first control valve (22) and the second control valve (32) are arranged to:
When the temperature of the environment where the cooling device is located is higher than or equal to a preset temperature, the first control valve (22) is in an open state, the second control valve (32) is in a closed state, and the refrigerant can flow through the first circulation flow path;
when the temperature of the environment where the cooling device is located is lower than a preset temperature, the first control valve (22) is in a closed state, the second control valve (32) is in an open state, and the refrigerant can flow through the second circulation flow path.
8. A control method of a cooling device, characterized in that the cooling device is the cooling device for a server according to any one of claims 1 to 7; the control method comprises the following steps:
acquiring the current temperature of the environment where the cooling device is positioned;
Determining a target circulation flow path according to the current temperature;
Controlling the target circulation flow path to communicate and allow a refrigerant to flow through the target circulation flow path;
wherein the target circulation flow path is the first circulation flow path or the second circulation flow path.
9. The control method of a cooling apparatus according to claim 8, wherein the determining a target circulation flow path according to the current temperature includes:
Comparing the current temperature with a preset temperature;
When the current temperature is higher than or equal to the preset temperature, determining the target circulation flow path as the first circulation flow path;
and when the current temperature is lower than the preset temperature, determining the target circulation flow path as the second circulation flow path.
10. The control method of the cooling device according to claim 8, characterized in that the controlling the target circulation flow path communication includes:
when the target circulation flow path is the first circulation flow path, the first branch pipeline (21) is controlled to be communicated, the second branch pipeline (31) is controlled to be disconnected, and the compressor (23) is controlled to operate;
When the target circulation flow path is the second circulation flow path, the second branch pipe (31) is controlled to be communicated and the first branch pipe (21) is controlled to be disconnected, and the pump (33) is controlled to operate.
11. The control method of a cooling apparatus according to claim 10, characterized in that the control method further comprises:
acquiring a current pressure of the refrigerant in the second circulation flow path when the pump (33) is in an operating state;
Comparing the current pressure with an atmospheric pressure;
When the current pressure is greater than or equal to the atmospheric pressure, the pump (33) is controlled to stop operating, and the second branch pipeline (31) is controlled to be disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311834667.7A CN117979633A (en) | 2023-12-27 | 2023-12-27 | Cooling device for server and control method of cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311834667.7A CN117979633A (en) | 2023-12-27 | 2023-12-27 | Cooling device for server and control method of cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117979633A true CN117979633A (en) | 2024-05-03 |
Family
ID=90853927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311834667.7A Pending CN117979633A (en) | 2023-12-27 | 2023-12-27 | Cooling device for server and control method of cooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117979633A (en) |
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2023
- 2023-12-27 CN CN202311834667.7A patent/CN117979633A/en active Pending
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