CN116744657A - Liquid cooling system and control method thereof - Google Patents
Liquid cooling system and control method thereof Download PDFInfo
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- CN116744657A CN116744657A CN202310884886.XA CN202310884886A CN116744657A CN 116744657 A CN116744657 A CN 116744657A CN 202310884886 A CN202310884886 A CN 202310884886A CN 116744657 A CN116744657 A CN 116744657A
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- 239000007788 liquid Substances 0.000 title claims abstract description 466
- 238000001816 cooling Methods 0.000 title claims abstract description 417
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000017525 heat dissipation Effects 0.000 claims abstract description 23
- 230000005855 radiation Effects 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims description 24
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052731 fluorine Inorganic materials 0.000 abstract description 5
- 239000011737 fluorine Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 20
- 238000012546 transfer Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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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
- H05K7/20136—Forced ventilation, e.g. by fans
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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
- H05K7/20209—Thermal management, e.g. fan control
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The application discloses a liquid cooling system and a control method thereof, which relate to the technical field of liquid cooling and are used for solving the problems that the heat exchange efficiency of the liquid cooling scheme is poor, the energy consumption is large, and a compressor or a fluorine pump system in the liquid cooling scheme has high requirements on the outdoor environment temperature and poor adaptability because the indoor heat exchange cycle and the outdoor heat exchange cycle are generally isolated through an intermediate heat exchanger in the existing liquid cooling scheme. The liquid cooling system is used for radiating heat for the working device, and comprises: the liquid cooling cabinet assembly is provided with a medium, and the working device is arranged in the medium in the liquid cooling cabinet assembly; the liquid cooling pump assembly is connected with the liquid cooling cabinet assembly; the two ends of the outdoor condenser are respectively connected with the liquid cooling cabinet assembly and the liquid cooling pump assembly; the heat dissipation fan is arranged at one side of the outdoor condenser; the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser form a medium circulation loop, and heat in the outdoor condenser is blown into an outdoor environment through the heat radiation fan.
Description
Technical Field
The application relates to the technical field of liquid cooling, in particular to a liquid cooling system and a control method thereof.
Background
The Chinese informatization construction is more and more important, the investment is continuously increased, the system is more and more concentrated, and the reliability requirement on the heat radiation system is higher. Based on the above, the country requires higher energy efficiency of the data center, the PUE value is less than 1.2, and the user requires higher cost performance, and the redundancy is refused, and unnecessary investment causes resource waste.
The principle of the liquid cooling technology is that heat transfer efficiency is improved through heat conduction and heat convection of liquid, heat is efficiently taken away from a server through a special cooling liquid medium, and therefore the purpose of rapid cooling is achieved, and the liquid cooling technology mainly has the following characteristics: the heat transfer capacity of the air-cooled type air conditioner is 1000 times of that of air, the cooling efficiency is higher than that of air, the noise is low, the site selection is easy, the site selection requirement of a machine room is lower than that of a traditional machine room, and the average PUE (physical distribution equipment) of various places throughout the country can reach about 1.1, namely, the liquid cooling technology has improved energy efficiency to a certain extent compared with the traditional machine room.
However, the liquid cooling scheme commonly used in the industry generally isolates the indoor side heat exchange cycle from the outdoor side heat exchange cycle through an intermediate heat exchanger (such as a plate heat exchanger), the heat exchange efficiency of the liquid cooling scheme is poor, the energy loss of the liquid cooling scheme is large, and the compressor or the fluorine pump system in the liquid cooling scheme can be started only in a lower interval (generally below 15 ℃) when the outdoor environment temperature is required for the compressor or the fluorine pump system, so that the adaptability of the liquid cooling scheme in the whole country is greatly limited.
Accordingly, the prior art is still in need of improvement.
Disclosure of Invention
The application aims to provide a liquid cooling system, which aims to solve the problems that the heat exchange efficiency of the liquid cooling scheme is poor, the energy consumption is high, and a compressor or a fluorine pump system in the liquid cooling scheme has high requirements on the outdoor environment temperature and has poor adaptability because the indoor heat exchange cycle and the outdoor heat exchange cycle are generally isolated through an intermediate heat exchanger in the existing liquid cooling scheme.
To achieve the above object, a first aspect of the present application provides a liquid cooling system for dissipating heat from a working device, including:
the liquid cooling cabinet assembly is provided with a medium, and the working device is arranged in the medium in the liquid cooling cabinet assembly;
a liquid cooling pump assembly connected to the liquid cooling cabinet assembly;
the two ends of the outdoor condenser are respectively connected with the liquid cooling cabinet assembly and the liquid cooling pump assembly;
the heat dissipation fan is arranged at one side of the outdoor condenser;
the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser form a medium circulation loop, and heat in the outdoor condenser is blown into an outdoor environment through the heat radiation fan.
According to the liquid cooling system, the liquid cooling cabinet assembly comprises at least one first liquid cooling cabinet, the liquid cooling system further comprises a flow valve which is arranged corresponding to the first liquid cooling cabinet, the input end of the flow valve is connected with the first liquid cooling cabinet, and the output end of the flow valve is connected with the liquid cooling pump assembly.
According to the liquid cooling system, four first liquid cooling cabinets are arranged in parallel;
the liquid cooling system also comprises a constant volume tank, a header unit liquid supply pipe and a header unit liquid return pipe, and the constant volume tank is connected with the outdoor condenser;
the liquid supply pipe of the header unit is provided with a liquid supply input port and a liquid supply output port corresponding to the first liquid cooling cabinet, the liquid supply input port is connected with the constant volume tank, and the liquid supply output port is connected with the first liquid cooling cabinet corresponding to the liquid supply input port;
the liquid return pipe of the header unit is provided with a liquid return output port and a liquid return input port corresponding to the first liquid cooling cabinet, the liquid return input port is connected with the corresponding first liquid cooling cabinet, and the liquid return output port is connected with the liquid cooling pump assembly.
According to the liquid cooling system, the liquid cooling pump assembly comprises a first liquid cooling pump and a second liquid cooling pump, the first liquid cooling pump and the second liquid cooling pump are arranged in parallel, the first liquid cooling pump is connected with the outlet end of the liquid cooling cabinet assembly, and the second liquid cooling pump is connected with the outlet end of the liquid cooling cabinet assembly;
The liquid cooling system further comprises a first one-way valve and a second one-way valve, wherein the input end of the first one-way valve is connected with the first liquid cooling pump, the output end of the first one-way valve is connected with the inlet end of the outdoor condenser, the input end of the second one-way valve is connected with the second liquid cooling pump, and the output end of the second one-way valve is connected with the inlet end of the outdoor condenser.
According to the liquid cooling system, the liquid cooling system further comprises a liquid cooling pump inlet pressure sensor, a liquid cooling pump outlet pressure sensor and a hydraulic pump inlet temperature sensor, wherein the liquid cooling pump inlet pressure sensor and the hydraulic pump inlet temperature sensor are arranged at the inlet end of the hydraulic pump assembly, and the liquid cooling pump outlet pressure sensor is arranged at the outlet end of the hydraulic pump assembly.
According to the above liquid cooling system, the liquid cooling system further comprises a liquid cooling cabinet outlet temperature sensor corresponding to the first liquid cooling cabinet, and the liquid cooling cabinet outlet temperature sensor is arranged at the outlet end of the first liquid cooling cabinet and is used for detecting the outlet temperature of the first liquid cooling cabinet.
A second aspect of the embodiment of the present application provides a control method of a liquid cooling system, where the control method includes:
The working device is placed in a medium of a liquid cooling cabinet assembly, and heat of the working device is conveyed to an outdoor condenser through the medium in a medium circulation loop under the driving of a hydraulic pump assembly, wherein the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser are sequentially connected to form a medium circulation loop;
and blowing heat in the outdoor condenser to the outdoor environment through a heat radiation fan so as to radiate heat of the working device, wherein the heat radiation fan is arranged on one side of the outdoor condenser.
The control method of the liquid cooling system according to the above, the control method further includes:
detecting whether the liquid cooling pump assembly is abnormal or not, and if the liquid cooling pump assembly is abnormal, acquiring a first running time of a first liquid cooling pump and a second running time of a second liquid cooling pump, wherein the liquid cooling pump assembly comprises the first liquid cooling pump and the second liquid cooling pump, and the first liquid cooling pump and the second liquid cooling pump are connected in parallel;
if the second operation time is smaller than the first operation time, starting the second liquid cooling pump to work until the second operation time is not smaller than the first operation time, and switching to the first liquid cooling pump to work;
and if the first operation time is equal to the second operation time, starting the first liquid cooling pump to work, and switching to the second liquid cooling pump to work when the first liquid cooling pump continues to work for a preset polling time.
The control method of the liquid cooling system according to the above, the control method further includes:
acquiring a first temperature of a first liquid cooling cabinet;
when the first temperature is higher than a first preset temperature, setting the valve opening proportion of the flow valve to 100%;
the liquid cooling cabinet assembly comprises at least one first liquid cooling cabinet, wherein the first liquid cooling cabinet is correspondingly provided with a flow valve, the flow valve is arranged at the outlet end of the first liquid cooling cabinet, and the first preset temperature is the sum of preset refrigeration temperature and refrigeration deviation;
when the first temperature is smaller than a second preset temperature, setting the valve opening proportion of the flow valve to be 0%, wherein the second preset temperature is the difference between the preset refrigeration temperature and the refrigeration deviation;
when the first temperature is between the second preset temperature and the first preset temperature, the valve opening proportion of the flow valve is linearly executed according to the temperature interval.
The control method of the liquid cooling system according to the above, the control method further includes:
acquiring a temperature difference of air supply and return of the outdoor condenser, wherein the temperature difference of the air supply and return is the difference between the air outlet temperature of the outdoor condenser and the air inlet temperature of the outdoor condenser;
if the temperature difference of the air supply and return is larger than a third preset temperature, the heat radiation fan operates at a first rotating speed, wherein the third preset temperature is the sum of the heat exchange temperature difference and the heat exchange temperature difference deviation of the medium and the outdoor environment, and the first rotating speed is a preset upper limit rotating speed;
If the temperature difference of the air supply and return is smaller than a fourth preset temperature, the heat radiation fan operates at a second rotating speed, wherein the fourth preset temperature is the difference between the heat exchange temperature difference between the medium and the outdoor environment and the deviation of the heat exchange temperature difference, and the second rotating speed is a preset lower limit rotating speed;
when the temperature difference of the air supply and return is between the fourth preset temperature and the third preset temperature, the heat dissipation fan performs linear adjustment according to a rotating speed interval.
The liquid cooling system and the control method thereof provided by the application have the beneficial effects that:
according to the application, the liquid cooling pump assembly is directly connected with the outdoor condenser without adopting an intermediate heat exchanger, so that a medium can be directly circulated through the liquid cooling pump assembly and the outdoor condenser, an intermediate secondary energy conversion link is eliminated, the most direct and most efficient heat elimination channel is realized, the heat exchange efficiency of the whole system is improved by more than 10%, and the high-efficiency convection and conduction are formed by immersing the server heating chip in the medium in the liquid cooling cabinet assembly and directly contacting the medium with the server heating chip, so that the rapid heat transfer is realized, meanwhile, the normal working temperature of the server heating chip can reach 100 ℃, the medium is closely abutted against a heat source (the server heating chip), which is equivalent to the improvement of the working temperature of the medium to a very high value, the temperature of the medium exchanging heat with the server heating chip is controlled to be 45-55 ℃, the application can ensure that the optimal working interval temperature of the server, namely the medium temperature after heat exchange with a heating chip of the server reaches 68-78 ℃, the medium temperature is improved by 31-38 ℃ compared with the highest 37-40 ℃ return air temperature of traditional air cooling, and the extreme highest air temperature of the outdoor environment of each city in the national range is generally about 48 ℃, under the extreme air temperature condition, the application adopts a direct primary heat dissipation system, and the heat exchange temperature difference between the medium temperature and the highest temperature 48 ℃ of the outdoor environment is still 20-30 ℃ and is enough to ensure the heat exchange effect of the liquid cooling system under the extreme condition, so that the liquid cooling system is applicable to the national range without being limited by regions, and the high efficiency, the energy conservation and the ultrahigh applicability of the liquid cooling system are truly realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a liquid cooling system according to an embodiment of the present application.
Fig. 2 is a main flowchart of a control method of a liquid cooling system according to an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating a linear adjustment of an operation frequency of a liquid cooling pump assembly in a temperature interval according to a control method of a liquid cooling system according to an embodiment of the present application.
Wherein, each reference sign in the figure:
1. a liquid-cooled cabinet assembly; 11. a first liquid-cooled cabinet; 12. a flow valve; 21. a first liquid cooling pump; 22. a second liquid cooling pump; 23. a first one-way valve; 24. a second one-way valve; 3. an outdoor condenser; 4. a heat radiation fan; 5. a constant volume tank; 6. a header unit liquid supply pipe; 7. a liquid return pipe of the header unit; 81. a liquid cooling pump inlet pressure sensor; 82. a liquid cooling pump outlet pressure sensor; 83. a hydraulic pump inlet temperature sensor; 84. a liquid cooling cabinet outlet temperature sensor; 85. a condenser return air temperature sensor; 86. and a condenser air outlet temperature sensor.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are directions or positions based on the drawings, and are merely for convenience of description and are not to be construed as limiting the present technical solution. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
The Chinese informatization construction is more and more important, the investment is continuously increased, the system is more and more concentrated, and the reliability requirement on the heat radiation system is higher. Based on the above, the country requires higher energy efficiency of the data center, the PUE value is less than 1.2, and the user requires higher cost performance, and the redundancy is refused, and unnecessary investment causes resource waste.
The principle of the liquid cooling technology is that heat transfer efficiency is improved through heat conduction and heat convection of liquid, heat is efficiently taken away from a server through a special cooling liquid medium, and therefore the purpose of rapid cooling is achieved, and the liquid cooling technology mainly has the following characteristics: compared with air with heat transfer capacity more than 1000 times, the cooling efficiency is higher than that of air, the noise is low (less than or equal to 42dB (A)), the high power density is reduced, the TCO (Total Cost of Ownership ) is reduced, natural cooling mode can be adopted for heat dissipation, the annual average and peak PUE are extremely low, and the carbon emission is reduced; the machine room is easy to select, the machine room selecting requirement is lower than that of the traditional machine room, and the average PUE (polyurethane) of each place in the whole country can reach about 1.1, namely, the liquid cooling technology is improved to a certain extent in the aspect of saving energy efficiency compared with the traditional machine room.
However, the inventor finds that the liquid cooling scheme commonly used in the industry at present generally isolates the indoor heat exchange cycle from the outdoor heat exchange cycle through an intermediate heat exchanger (such as a plate heat exchanger), and because of the difference of design standards of various manufacturers of the intermediate heat exchanger, standardization is difficult to form, and meanwhile, secondary heat conduction and convection exist, so that the overall heat exchange efficiency is necessarily affected; in addition, the compressor or the fluorine pump system in the liquid cooling scheme is required to be started only in a lower interval (generally below 15 ℃) when the outdoor environment temperature is required, so that the applicability of the liquid cooling scheme in the whole country is greatly limited.
For this reason, referring to fig. 1, a first aspect of the present embodiment provides a liquid cooling system for dissipating heat from a working device (for example, a server heat generating chip), where the liquid cooling system includes a liquid cooling cabinet assembly 1, a liquid cooling pump assembly, an outdoor condenser 3, and a heat dissipating fan 4, where the liquid cooling cabinet assembly 1 has a medium therein, the medium is an insulating medium, the working device is disposed in the medium in the liquid cooling cabinet assembly 1, the liquid cooling pump assembly is connected to the liquid cooling cabinet assembly 1, two ends of the outdoor condenser 3 are respectively connected to the liquid cooling cabinet assembly 1 and the liquid cooling pump assembly, the heat dissipating fan 4 is disposed on one side of the outdoor condenser 3, the liquid cooling cabinet assembly 1, the liquid cooling pump assembly and the outdoor condenser 3 form a medium circulation loop, the heat from the working device flows into the medium in the outdoor condenser through the medium, and blows the heat from the outdoor condenser 3 to the outdoor environment through the heat dissipating fan 4;
in this embodiment, instead of using an intermediate heat exchanger, the liquid cooling pump assembly is directly connected to the outdoor condenser 3, so that the medium can be directly circulated through the liquid cooling pump assembly and the outdoor condenser 3, the intermediate secondary energy conversion link is eliminated, the most direct and efficient heat elimination channel is realized, the heat exchange efficiency of the whole system is improved by more than 10%, and the heat exchange efficiency of the whole system is improved by controlling the temperature of the medium exchanging heat with the server heat chip to 45-55 ℃ by immersing the server heat chip in the medium in the liquid cooling cabinet assembly 1, and by directly contacting the medium with the server heat chip, high-efficient convection and conduction are formed, so that the rapid heat transfer is realized, meanwhile, because the normal working temperature of the server heat chip can reach 100 ℃, the working temperature of the medium is increased to a very high value by abutting the medium against the heat source (the server heat chip), the temperature of the medium exchanging heat with the server heat chip is controlled to 45-55 ℃, the optimal working interval temperature of the server can be ensured, namely the medium temperature after heat exchange with the heating chip of the server reaches 68-78 ℃, the medium temperature is improved by 31-38 ℃ compared with the highest air return temperature of 37-40 ℃ in the traditional air cooling, the extreme highest air temperature of the outdoor environment of each city in the national range is generally about 48 ℃, under the extreme air temperature condition, the embodiment adopts a direct primary heat dissipation system, the medium temperature still has the heat exchange temperature difference of 20-30 ℃ with the highest temperature 48 ℃ of the outdoor environment at 68-78 ℃, the heat exchange effect under the extreme condition of the liquid cooling system is enough to ensure, so that the liquid cooling system of the embodiment is applicable to the national range area without being limited by regions, the high efficiency, the energy conservation and the ultrahigh applicability of the liquid cooling system are truly realized, and the water consumption WUE (Water Use Efficiency, moisture utilization) =0.
Optionally, the liquid cooling system further includes a control module (not shown in the figure), where the control module may be a single-chip microcomputer, and the control module is connected to the liquid cooling pump assembly, the liquid cooling cabinet assembly 1, and the cooling fan 4 respectively.
Referring to fig. 1, optionally, the liquid cooling cabinet assembly 1 includes at least a first liquid cooling cabinet 11, and the liquid cooling system further includes a flow valve 12 disposed corresponding to the first liquid cooling cabinet 11, where the flow valve 12 may be an electric ball valve, an input end of the flow valve 12 is connected with the first liquid cooling cabinet 11, and an output end of the flow valve 12 is connected with the liquid cooling pump.
Referring to fig. 1, further, the number of the first liquid cooling cabinets 11 may be one or more, in this embodiment, the number of the first liquid cooling cabinets 11 is more, and by setting a plurality of first liquid cooling cabinets 11 and immersing the working devices in each first liquid cooling cabinet 11, more working devices can be processed in one liquid cooling system, so as to improve the workload of the liquid cooling system.
Referring to fig. 1, four first liquid cooling cabinets 11 are provided, and the four first liquid cooling cabinets 11 are arranged in parallel, where each first liquid cooling cabinet 11 is configured with one inlet end and one outlet end;
Referring to fig. 1, optionally, the liquid cooling system further includes a constant volume tank 5, a header unit liquid supply pipe 6 and a header unit liquid return pipe 7, where the constant volume tank 5 has a tank inlet and a tank outlet, the tank inlet is connected to the outdoor condenser 3, the header unit liquid supply pipe 6 has a liquid supply input and a liquid supply output corresponding to the first liquid cooling cabinet 11, the liquid supply input is connected to the constant volume tank 5, the liquid supply output is connected to an inlet end of the first liquid cooling cabinet 11 corresponding thereto, for example, the first liquid cooling cabinet 11 is provided with four liquid supply output, and the liquid supply output is provided with four liquid return output, each of the first liquid cabinet corresponds to one liquid supply output, the header unit liquid return pipe 7 has a liquid return output and a liquid return input corresponding to the first liquid cooling cabinet 11, the liquid return input is connected to an outlet end of the first liquid cooling cabinet 11 corresponding thereto, for example, the first liquid cooling cabinet 11 is provided with four liquid return input, the liquid return output is provided with a pump assembly connected to the liquid return pump assembly;
according to the embodiment, the header unit liquid supply pipes 6 are arranged to realize that media can be uniformly distributed into the first liquid cooling cabinets 11, the header unit liquid return pipes 7 are arranged to realize that media in all the first liquid cooling cabinets 11 can be discharged and collected and flow into the liquid cooling pump assembly, and the constant volume tanks 5 are arranged to ensure that the header unit liquid supply pipes 6 are in a liquid full state, so that the quantity of circulating media supplied to the first liquid cooling cabinets 11 is sufficient, and the phenomenon that the header unit liquid supply pipes 6 are not full of liquid is avoided.
Referring to fig. 1, optionally, the liquid cooling pump assembly includes a first liquid cooling pump 21 and a second liquid cooling pump 22, where the first liquid cooling pump 21 and the second liquid cooling pump 22 are disposed in parallel, an inlet end of the first liquid cooling pump 21 is connected to a liquid return output port of the liquid return pipe of the collecting unit, an inlet end of the second liquid cooling pump 22 is connected to a liquid return output port of the liquid return pipe of the collecting unit, the liquid cooling system further includes a first check valve 23 and a second check valve 24, an input end of the first check valve 23 is connected to an outlet end of the first liquid cooling pump 21, an output end of the first check valve 23 is connected to an inlet end of the outdoor condenser 3, an input end of the second check valve 24 is connected to an outlet end of the second liquid cooling pump 22, and an output end of the second check valve 24 is connected to an inlet end of the outdoor condenser 3;
the flow directions of the first check valve 23 and the second check valve 24 are all unidirectional flow, and the medium can only flow in from the input end of the first check valve 23 and flow out from the output end of the first check valve 23, and the medium can not flow in from the output end of the first check valve 23, and the medium can only flow in from the input end of the second check valve 24 and flow out from the output end of the second check valve 24, and the medium can not flow in from the output end of the second check valve 24;
In this embodiment, by setting two first liquid cooling pumps 21 and second liquid cooling pumps 22 connected in parallel, one of the two first liquid cooling pumps 21 and the second liquid cooling pumps 22 can be used as a main working device, and the other one of the two first liquid cooling pumps and the second liquid cooling pumps can be used as a standby working device, so that when one of the two first liquid cooling pumps 21 and the second liquid cooling pumps 22 is damaged, the two first liquid cooling pumps 21 and the second liquid cooling pumps 22 can be used in a timely switching manner to improve the working stability of the whole liquid cooling system, and of course, the first liquid cooling pumps 21 and the second liquid cooling pumps 22 can also be used in a time switching manner to prevent the problem that the first liquid cooling pumps 21 or the second liquid cooling pumps 22 are easy to damage when working for a long time; in addition, in this embodiment, the first check valve 23 and the second check valve 24 are provided so that the medium does not form a short circulation when the first liquid cooling pump 21 or the second liquid cooling pump 22 is arbitrarily turned on.
It should be noted that the first liquid cooling pump 21 and the second liquid cooling pump 22 do not operate simultaneously, and only the first liquid cooling pump 21 or the second liquid cooling pump 22 is allowed to operate for a period of time.
Referring to fig. 1, optionally, the liquid cooling system further includes a liquid cooling pump inlet pressure sensor 81, a liquid cooling pump outlet pressure sensor 82, and a hydraulic pump inlet temperature sensor 83, wherein an output end of the liquid cooling pump inlet pressure sensor 81, an output end of the liquid cooling pump outlet pressure sensor 82, and an output end of the hydraulic pump inlet temperature sensor 83 are respectively connected with an input end of the control module, the liquid cooling pump inlet pressure sensor 81 is used for detecting an inlet pressure value of the first liquid cooling pump 21 or the second liquid cooling pump 22, the liquid cooling pump outlet pressure sensor 82 is used for detecting an outlet pressure value of the first liquid cooling pump 21 or the second liquid cooling pump 22, the liquid cooling pump inlet temperature sensor 83 is used for detecting an inlet temperature of the first liquid cooling pump 21 or the second liquid cooling pump 22, the liquid cooling pump inlet pressure sensor 81 and the liquid cooling pump inlet temperature sensor 83 are disposed at an inlet end of the hydraulic pump assembly, and the liquid cooling pump outlet pressure sensor 82 is disposed at an outlet end of the hydraulic pump assembly;
Referring to fig. 1, optionally, the liquid cooling system further includes a liquid cooling cabinet outlet temperature sensor 84 disposed corresponding to the first liquid cooling cabinet 11, an output end of the liquid cooling cabinet outlet temperature sensor 84 is connected to an input end of the control module, and the liquid cooling cabinet outlet temperature sensor 84 is disposed at an outlet end of the first liquid cooling cabinet 11 and is used for detecting an outlet temperature of the first liquid cooling cabinet 11.
Referring to fig. 1, optionally, the liquid cooling system further includes a condenser return air temperature sensor 85 and a condenser outlet air temperature sensor 86, where the condenser return air temperature sensor 85 is disposed on one side of the outdoor condenser 3, the condenser outlet air temperature sensor 86 is disposed on the other side of the outdoor condenser 3, and an output end of the condenser return air temperature sensor 85 and an output end of the condenser outlet air temperature sensor 86 are respectively connected with an input end of the control module, where the condenser return air temperature sensor 85 is used to detect an inlet air temperature of a return air side of the outdoor condenser 3, and the condenser outlet air temperature sensor 86 is used to detect an outlet air temperature of an outlet air side of the outdoor condenser 3.
Referring to fig. 2, a second aspect of the present embodiment provides a control method of a liquid cooling system, which is applied to the liquid cooling system described above, the control method includes:
S10, placing a working device in a medium of a liquid cooling cabinet assembly, and conveying heat of the working device to an outdoor condenser through the medium in a medium circulation loop under the drive of a hydraulic pump assembly;
s20, blowing out heat in the outdoor condenser to the outdoor environment through a heat radiation fan so as to realize heat radiation of the chip.
Specifically, the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser are sequentially connected to form a medium circulation loop, the medium circulation loop is provided with a medium, the medium is a cooling liquid medium, on the basis of the above, the embodiment can realize heat dissipation of the working device by placing the working device (such as a server heating chip) into the cooling liquid medium of the liquid cooling cabinet assembly, heat generated by the working device in a working state can be conducted into the medium, the heat of the working device is conveyed into the outdoor condenser through the medium in the medium circulation loop under the driving of the hydraulic pump assembly, and it can be known that the hydraulic pump assembly is used for keeping the medium in the whole medium circulation loop to keep continuous flowing so that the medium is in a flowing circulation state, and a heat dissipation fan is arranged at one side of the outdoor condenser, so that the heat in the outdoor condenser can be blown into an outdoor environment through the heat dissipation fan, and the liquid cooling function of the liquid cooling system is realized;
The control method of the embodiment is based on directly connecting the liquid cooling pump assembly with the outdoor condenser, so that the medium can be directly circulated through the liquid cooling pump assembly and the outdoor condenser, the intermediate secondary energy conversion link is eliminated, the most direct and most efficient heat elimination channel is realized, the heat exchange efficiency of the whole system is improved by more than 10%, the server heating chip is immersed in the medium in the liquid cooling cabinet assembly, and high-efficiency convection and conduction are formed through the direct contact of the medium and the server heating chip, so that the rapid heat transfer is realized, meanwhile, the normal working temperature of the server heating chip can reach 100 ℃, the working temperature of the medium is correspondingly improved to a very high value through the close contact of the medium with the heat source (the server heating chip), the temperature of the medium exchanging heat with the server heating chip is controlled to be 45-55 ℃, the optimal working interval temperature of the server, namely the medium temperature after heat exchange with the heating chip of the server, can reach 68-78 ℃, the medium temperature is improved by 31-38 ℃ compared with the highest 37-40 ℃ return air temperature of traditional air cooling, the extreme highest air temperature of the outdoor environment of each city in the national range is generally about 48 ℃, under the extreme air temperature condition, the embodiment adopts a direct primary heat dissipation system, and the medium temperature still has the heat exchange temperature difference of 20-30 ℃ with the highest temperature 48 ℃ of the outdoor environment at 68-78 ℃, so that the heat exchange effect of the liquid cooling system is enough to be ensured under the extreme condition, so that the liquid cooling system of the embodiment is applicable to the national range area without being limited by regions, and the high efficiency, the energy conservation and the ultrahigh applicability of the liquid cooling system are truly realized.
In one implementation, the control method further includes:
detecting whether the liquid cooling pump assembly is abnormal or not, and if the liquid cooling pump assembly is abnormal, acquiring a first running time of the first liquid cooling pump and a second running time of the second liquid cooling pump;
if the second operation time is smaller than the first operation time, starting the second liquid cooling pump to work until the second operation time is not smaller than the first operation time, and switching to the first liquid cooling pump to work;
and if the first operation time is equal to the second operation time, starting the first liquid cooling pump to work, and switching to the second liquid cooling pump to work when the first liquid cooling pump continues to work for a preset polling time.
Specifically, the liquid cooling pump assembly includes a first liquid cooling pump and a second liquid cooling pump, the first liquid cooling pump and the second liquid cooling pump are connected in parallel, the first operation time is the operation time of the first liquid cooling pump, the second operation time is the operation time of the second liquid cooling pump, when the liquid cooling pump assembly has an opening condition, the control unit detects whether the liquid cooling pump assembly has a fault, if the first liquid cooling pump has a fault, the second liquid cooling pump is started to operate, if the second liquid cooling pump has a fault, the first liquid cooling pump is started to operate, when the liquid cooling pump assembly has no fault, the pump with a short accumulated operation time is started to operate preferentially, for example, when the first liquid cooling pump has accumulated the first operation time Ta, the second liquid cooling pump accumulates the second operation time Tb, and if Ta is greater than Tb, the second liquid cooling pump is preferentially operated; when Ta is equal to Tb, switching to the first liquid cooling pump operation, presetting the round inspection time Tc, and when the first liquid cooling pump continues to operate for Tc, switching to the second liquid cooling pump operation again to form a cycle;
And, the pumping pressure difference Δp=pout-Pin, the pressure difference is too high, the pressure difference is Ph, the pressure difference is too low, the pressure difference is Pl, wherein Pout is the liquid cooling pump outlet pressure value, pin is the liquid cooling pump inlet pressure value, when the pumping pressure difference is too high (Δp is greater than or equal to Ph) or the pumping pressure difference is too low (Δp is less than or equal to Pl) in the operation process of the second hydraulic pump, and when the pumping pressure difference lasts for a period of time (for example, 10 s), it is indicated that the pump is abnormal at this moment, the operation is switched to the first liquid cooling pump, the fault backup is realized, and correspondingly, when the first hydraulic pump is abnormal in the operation process of the first hydraulic pump, the operation is switched to the second liquid cooling pump.
In one implementation, the control method further includes:
acquiring a first temperature of a first liquid cooling cabinet;
when the first temperature is higher than a first preset temperature, setting the valve opening proportion of the flow valve to 100%;
when the first temperature is smaller than the second preset temperature, setting the valve opening proportion of the flow valve to be 0%;
when the first temperature is between the second preset temperature and the first preset temperature, the valve opening proportion of the flow valve is linearly executed according to intervals;
specifically, the liquid cooling cabinet assembly comprises at least one first liquid cooling cabinet, the first liquid cooling cabinets are correspondingly provided with a flow valve, the flow valve is arranged at the outlet end of the first liquid cooling cabinet, the first preset temperature is the sum of preset refrigeration temperature and refrigeration deviation, the second preset temperature is the difference between the preset refrigeration temperature and refrigeration deviation, and the flow control of each first liquid cooling cabinet is regulated through the flow valve (such as an electric ball valve). The valve opening ratio of the flow valve is 0-100%, the corresponding voltage output is 0-10V, and when the first liquid cooling cabinet is not required, the flow valve keeps the standby opening. The specific algorithm is as follows:
The flow valve is opened in a 30% initial valve opening proportion, opening adjustment is performed according to a linear proportion, wherein the control module sets a preset refrigeration temperature Tset and refrigeration deviation DeltaTs, the current outlet temperature of the first liquid cooling cabinet is assumed to be TA, when TA is more than or equal to (Tset+DeltaTs), the refrigeration requirement is defined to be 100% when TA is more than or equal to (Tset+DeltaTs), the opening adjustment is performed according to a linear proportion, when the outlet temperature of the first liquid cooling cabinet is defined to be TA < (Tset-DeltaTs), the refrigeration requirement is defined to be 5s, and the flow valve is defined to be closed when the first liquid cooling cabinet is free of refrigeration requirement. When (Tset-DeltaTs) is less than or equal to TA < (Tset-DeltaTs), the valve opening proportion of the flow valve is linearly regulated according to the interval, and the specific regulation strategy is as follows:
when TA approaches (Tset-DeltaTs), the flow valve opening proportion is close to the lower limit valve opening proportion, if the outlet temperature of the first liquid cooling cabinet continuously decreases, the flow valve opening is executed to adjust to the standby opening;
in the interval 1, when TA is within (Tset (+ -) -DeltaTw), the flow valve does not adjust the valve opening proportion, wherein DeltaTw is a steady-state deviation value of the ball valve, and the default is 1.0 ℃, and the setting can be changed according to actual requirements;
in interval 2, when TA is in the range of (tset±Δtw) to (tset±Δtw) 2, the valve opening frequency of the ball valve is adjusted by 1%/Tw (steady-state valve adjusting time Tw, default 2s, which may be set) at a time, and the valve opening proportion is adjusted to be larger or smaller, where Tw is the steady-state valve adjusting time, default 2s, and of course, the setting may be changed according to the actual requirement, 1%/Tw is that 1 steady-state valve adjusting time passes every time, and the flow valve adjusting proportion is 1%;
Section 3, when TA is outside (tset±Δtw×2), the flow valve opening frequency is adjusted to be greater or smaller according to the valve opening ratio of 1%/tb, that is, when the flow valve opening ratio is changed, the single flow valve adjusting ratio is 1%, and the time tb is needed, and the time is distinguished according to whether the flow valve opening is greater or smaller, and considering that the temperature fluctuation in the first liquid cooling cabinet in this section may be greater, the flow valve opening frequency is distinguished into an ascending step size and a descending step size, so as to be more adaptive to the practical application scenario, in this embodiment, the flow valve opening frequency is specifically defined as 1%/tb: the step of increasing the opening of the flow valve is 1%/s by default; the flow valve opening step down defaults to 1%/4s.
In one implementation, referring to fig. 3, the control method further includes:
acquiring a third temperature at an inlet end of the liquid cooling pump assembly;
when the third temperature is higher than the first preset temperature, the operation frequency of the liquid cooling pump assembly starts to operate according to the first frequency;
when the third temperature is smaller than the second preset temperature, the operation frequency of the liquid cooling pump assembly starts to operate according to the second frequency;
when the third temperature is between the second preset temperature and the first preset temperature, the operation frequency of the liquid cooling pump assembly starts to operate according to the third frequency, wherein the third frequency performs linear adjustment in a temperature interval;
Specifically, the first preset temperature is the sum of the preset refrigeration temperature Tset and the refrigeration deviation Δts, that is, (tset+Δts), the second preset temperature is the difference between the preset refrigeration temperature Tset and the refrigeration deviation Δts, that is, (Tset- Δts), the third temperature is the inlet temperature of the liquid cooling pump assembly, the third temperature is detected by a liquid cooling cabinet outlet temperature sensor, and when the third temperature Tp (tset+Δts) of the liquid cooling pump assembly (the first liquid cooling pump or the second liquid cooling pump) indicates that the liquid cooling pump assembly has the refrigeration starting requirement, the liquid cooling pump assembly starts to operate at the starting frequency H (default 30Hz, which can be set according to the actual requirement); when the third temperature Tp < (Tset-DeltaTs) of the liquid cooling pump assembly indicates that the liquid cooling pump assembly has no refrigeration requirement, the liquid cooling pump assembly is delayed for 5s after being subjected to frequency reduction to the lower frequency limit, and the liquid cooling pump assembly enters the standby frequency, so that the liquid cooling pump assembly cannot stop even if the system has no refrigeration requirement because the medium circulated in the liquid cooling cabinet assembly must keep flowing continuously, and the medium is ensured to circulate continuously at a small standby frequency (default 20 Hz);
when (Tset-DeltaTs) is less than or equal to Tp < (Tset-DeltaTs), the liquid cooling pump assembly real-time operating frequency Uo will perform linear adjustment in a temperature interval, and the linear adjustment relation is The calculation by the difference method can be obtained:
in one implementation, the control method further includes:
acquiring the temperature difference of the air supply and return of the outdoor condenser;
if the temperature difference of the air supply and return is larger than a third preset temperature, the heat radiation fan operates at a first rotation speed;
if the temperature difference of the air supply and return is smaller than the fourth preset temperature, the heat radiation fan operates at a second rotating speed;
when the temperature difference of the air supply and return is between the fourth preset temperature and the third preset temperature, the heat dissipation fan performs linear adjustment according to a rotating speed interval.
Specifically, the temperature difference of the air supply and return is the difference between the air outlet temperature of the outdoor condenser and the air inlet temperature of the outdoor condenser, the third preset temperature is the sum of the heat exchange temperature difference between the medium and the outdoor environment and the heat exchange temperature difference deviation, the fourth preset temperature is the difference between the heat exchange temperature difference between the medium and the outdoor environment and the heat exchange temperature difference deviation, the first rotating speed is the preset upper limit rotating speed, and the second rotating speed is the preset lower limit rotating speed;
the heat dissipation fan judges whether to start according to the operation pressure P of the first liquid cooling pump, when the operation pressure P of the first liquid cooling pump is larger than the set starting pressure Pset of the heat dissipation fan, the heat dissipation fan executes starting operation at a preset lower limit rotating speed, an operation regulation control strategy of the heat dissipation fan is determined according to the outdoor environment temperature and the operation frequency of the liquid cooling pump assembly, and the essential purpose is to control the heat exchange temperature difference between a circulating medium entering and exiting an outdoor condenser and air in the outdoor environment, and the lower the frequency output of the liquid cooling pump assembly is, the smaller the heat exchange temperature difference between the medium and the outdoor environment is; different outdoor environment temperatures, the heat exchange temperature difference control of the medium and the outdoor environment is the same.
The heat exchange temperature difference between the medium and the outdoor environment is set to be delta Tsw (default 20 ℃ and can be set according to actual demands), the heat exchange temperature difference deviation is set to be delta Tsp (default 5 ℃ and can be set according to actual demands), when the operating frequency of the liquid cooling pump assembly is smaller, the load of the liquid cooling cabinet assembly is not large at the moment, the heat stored by the medium is not large, the medium is subjected to heat exchange with the outdoor environment air in the internal circulation of the outdoor condenser, the required outdoor circulation air quantity is small at the moment, the heat dissipation requirement of the circulating working medium can be met without opening an excessive rotating speed of a heat dissipation fan, and energy conservation is realized. The preset upper limit rotating speed of the heat dissipation fan is Ss, the preset lower limit rotating speed of the heat dissipation fan is Sx, the corresponding heat exchange temperature difference (third preset temperature) is delta Tsw minus delta Tsp, namely when the operating frequency of the liquid cooling pump assembly is higher, the heat stored by the circulating medium is larger, and the rotating speed requirement of the heat dissipation fan is higher.
Defining the temperature difference DeltaTh=Tlc-Tlh of the air supply and return of the outdoor condenser, wherein Tlc is the air outlet temperature of the outdoor condenser, tlh is the air inlet temperature of the outdoor condenser, and when DeltaTh is more than or equal to (DeltaTsw+DeltaTsp), the rotating speed of the heat radiation fan operates at a preset upper limit rotating speed Ss; when DeltaTh < (. DELTA.Tsw-DeltaTsp), the rotation speed of the heat radiation fan runs at the preset lower limit rotation speed Sx for 3min, the DeltaTh is detected again, and if DeltaTh < (. DELTA.Tsw-DeltaTsp) is still satisfied, the heat radiation fan stops running. When the delta Tsw-delta Tsp is less than or equal to delta Th < (delta Tsw+delta Tsp), the heat radiation fan performs linear adjustment according to the rotating speed interval.
In summary, the present application provides a liquid cooling system and a control method thereof, for dissipating heat of a working device (e.g., a server heat generating chip), where the liquid cooling system includes a liquid cooling cabinet assembly, a liquid cooling pump assembly, an outdoor condenser, and a heat dissipating fan, the liquid cooling cabinet assembly has a medium therein, the working device is disposed in the medium in the liquid cooling cabinet assembly, the liquid cooling pump assembly is connected with the liquid cooling cabinet assembly, two ends of the outdoor condenser are respectively connected with the liquid cooling cabinet assembly and the liquid cooling pump assembly, the heat dissipating fan is disposed at one side of the outdoor condenser, the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser form a medium circulation loop, the outdoor condenser has a pipeline, and heat of the working device flows into the pipeline of the outdoor condenser through the medium, the application does not adopt an intermediate heat exchanger, but directly connects the liquid cooling pump assembly with the outdoor condenser, thus directly circulating the medium with the outdoor condenser through the liquid cooling pump assembly, eliminating intermediate secondary energy conversion links, realizing the most direct and most efficient heat elimination channel, improving the heat exchange efficiency of the whole system by more than 10 percent, and forming efficient convection and conduction through the direct contact between the medium and the server heating chip by immersing the server heating chip in the medium in the liquid cooling cabinet assembly, realizing the rapid heat transfer, simultaneously, because the normal working temperature of the server heating chip can reach 100 ℃, the working temperature of the medium is improved to a very high value by the close contact of the medium with the heat source (the server heating chip), the medium temperature for heat exchange with the server heating chip is controlled to be 45-55 ℃, the optimal working interval temperature of the server can be ensured, namely, the medium temperature after heat exchange with the server heating chip can reach 68-78 ℃, the medium temperature is improved by 31-38 ℃ compared with the highest 37-40 ℃ return air temperature of traditional air cooling, and the extreme highest air temperature of the outdoor environment of each city in the national range is generally about 48 ℃, under the extreme air temperature condition, the direct primary heat dissipation system is adopted, the medium temperature is 68-78 ℃ and the heat exchange temperature difference between 20-30 ℃ is still remained between the extreme air temperature and the highest temperature 48 ℃ of the outdoor environment, so that the heat exchange effect under the extreme condition of the liquid cooling system is enough to ensure, the liquid cooling system is applicable to the national range, is not limited by regions, and the high-efficiency energy conservation and the ultrahigh applicability of the liquid cooling system are truly realized.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. A liquid cooling system for dissipating heat from a working device, comprising:
the liquid cooling cabinet assembly is provided with a medium, and the working device is arranged in the medium in the liquid cooling cabinet assembly;
a liquid cooling pump assembly connected to the liquid cooling cabinet assembly;
the two ends of the outdoor condenser are respectively connected with the liquid cooling cabinet assembly and the liquid cooling pump assembly;
the heat dissipation fan is arranged at one side of the outdoor condenser;
the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser form a medium circulation loop, and heat in the outdoor condenser is blown into an outdoor environment through the heat radiation fan.
2. The liquid cooling system of claim 1, wherein the liquid cooling cabinet assembly comprises at least a first liquid cooling cabinet, the liquid cooling system further comprises a flow valve disposed corresponding to the first liquid cooling cabinet, an input end of the flow valve is connected with the first liquid cooling cabinet, and an output end of the flow valve is connected with the liquid cooling pump assembly.
3. The liquid cooling system of claim 2, wherein four of the first liquid cooling cabinets are arranged in parallel;
the liquid cooling system also comprises a constant volume tank, a header unit liquid supply pipe and a header unit liquid return pipe, and the constant volume tank is connected with the outdoor condenser;
the liquid supply pipe of the header unit is provided with a liquid supply input port and a liquid supply output port corresponding to the first liquid cooling cabinet, the liquid supply input port is connected with the constant volume tank, and the liquid supply output port is connected with the first liquid cooling cabinet corresponding to the liquid supply input port;
the liquid return pipe of the header unit is provided with a liquid return output port and a liquid return input port corresponding to the first liquid cooling cabinet, the liquid return input port is connected with the corresponding first liquid cooling cabinet, and the liquid return output port is connected with the liquid cooling pump assembly.
4. The liquid cooling system of claim 1, wherein the liquid cooling pump assembly comprises a first liquid cooling pump and a second liquid cooling pump, the first liquid cooling pump and the second liquid cooling pump being arranged in parallel, the first liquid cooling pump being connected to an outlet end of the liquid cooling cabinet assembly, the second liquid cooling pump being connected to an outlet end of the liquid cooling cabinet assembly;
The liquid cooling system further comprises a first one-way valve and a second one-way valve, wherein the input end of the first one-way valve is connected with the first liquid cooling pump, the output end of the first one-way valve is connected with the inlet end of the outdoor condenser, the input end of the second one-way valve is connected with the second liquid cooling pump, and the output end of the second one-way valve is connected with the inlet end of the outdoor condenser.
5. The liquid cooling system of claim 1, further comprising a liquid cooling pump inlet pressure sensor, a liquid cooling pump outlet pressure sensor, and a hydraulic pump inlet temperature sensor, the liquid cooling pump inlet pressure sensor and the hydraulic pump inlet temperature sensor disposed at an inlet end of the hydraulic pump assembly, the liquid cooling pump outlet pressure sensor disposed at an outlet end of the hydraulic pump assembly.
6. The liquid cooling system of claim 2, further comprising a liquid cooling cabinet outlet temperature sensor disposed in correspondence with the first liquid cooling cabinet, the liquid cooling cabinet outlet temperature sensor disposed at an outlet end of the first liquid cooling cabinet and configured to detect an outlet temperature of the first liquid cooling cabinet.
7. A control method of a liquid cooling system, the control method comprising:
the working device is placed in a medium of a liquid cooling cabinet assembly, and heat of the working device is conveyed to an outdoor condenser through the medium in a medium circulation loop under the driving of a hydraulic pump assembly, wherein the liquid cooling cabinet assembly, the liquid cooling pump assembly and the outdoor condenser are sequentially connected to form a medium circulation loop;
and blowing heat in the outdoor condenser to the outdoor environment through a heat radiation fan so as to radiate heat of the working device, wherein the heat radiation fan is arranged on one side of the outdoor condenser.
8. The method of controlling a liquid cooling system according to claim 7, wherein the method further comprises:
detecting whether the liquid cooling pump assembly is abnormal or not, and if the liquid cooling pump assembly is abnormal, acquiring a first running time of a first liquid cooling pump and a second running time of a second liquid cooling pump, wherein the liquid cooling pump assembly comprises the first liquid cooling pump and the second liquid cooling pump, and the first liquid cooling pump and the second liquid cooling pump are connected in parallel;
if the second operation time is smaller than the first operation time, starting the second liquid cooling pump to work until the second operation time is not smaller than the first operation time, and switching to the first liquid cooling pump to work;
And if the first operation time is equal to the second operation time, starting the first liquid cooling pump to work, and switching to the second liquid cooling pump to work when the first liquid cooling pump continues to work for a preset polling time.
9. The method of controlling a liquid cooling system according to claim 7, wherein the method further comprises:
acquiring a first temperature of a first liquid cooling cabinet;
when the first temperature is higher than a first preset temperature, setting the valve opening proportion of the flow valve to 100%;
the liquid cooling cabinet assembly comprises at least one first liquid cooling cabinet, wherein the first liquid cooling cabinet is correspondingly provided with a flow valve, the flow valve is arranged at the outlet end of the first liquid cooling cabinet, and the first preset temperature is the sum of preset refrigeration temperature and refrigeration deviation;
when the first temperature is smaller than a second preset temperature, setting the valve opening proportion of the flow valve to be 0%, wherein the second preset temperature is the difference between the preset refrigeration temperature and the refrigeration deviation;
when the first temperature is between the second preset temperature and the first preset temperature, the valve opening proportion of the flow valve is linearly executed according to the temperature interval.
10. The method of controlling a liquid cooling system according to claim 7, wherein the method further comprises:
Acquiring a temperature difference of air supply and return of the outdoor condenser, wherein the temperature difference of the air supply and return is the difference between the air outlet temperature of the outdoor condenser and the air inlet temperature of the outdoor condenser;
if the temperature difference of the air supply and return is larger than a third preset temperature, the heat radiation fan operates at a first rotating speed, wherein the third preset temperature is the sum of the heat exchange temperature difference and the heat exchange temperature difference deviation of the medium and the outdoor environment, and the first rotating speed is a preset upper limit rotating speed;
if the temperature difference of the air supply and return is smaller than a fourth preset temperature, the heat radiation fan operates at a second rotating speed, wherein the fourth preset temperature is the difference between the heat exchange temperature difference between the medium and the outdoor environment and the deviation of the heat exchange temperature difference, and the second rotating speed is a preset lower limit rotating speed;
when the temperature difference of the air supply and return is between the fourth preset temperature and the third preset temperature, the heat dissipation fan performs linear adjustment according to a rotating speed interval.
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| CN117139648A (en) * | 2023-10-30 | 2023-12-01 | 山东创瑞激光科技有限公司 | Cooling device and method for optical path system of laser selective melting equipment |
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| CN117139648A (en) * | 2023-10-30 | 2023-12-01 | 山东创瑞激光科技有限公司 | Cooling device and method for optical path system of laser selective melting equipment |
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