CN114158235A - Liquid cooling heat dissipation system and control method thereof - Google Patents
Liquid cooling heat dissipation system and control method thereof Download PDFInfo
- Publication number
- CN114158235A CN114158235A CN202111425117.0A CN202111425117A CN114158235A CN 114158235 A CN114158235 A CN 114158235A CN 202111425117 A CN202111425117 A CN 202111425117A CN 114158235 A CN114158235 A CN 114158235A
- Authority
- CN
- China
- Prior art keywords
- liquid
- circulating pump
- control device
- pressure sensor
- cold source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20763—Liquid cooling without phase change
- H05K7/2079—Liquid cooling without phase change within rooms for removing heat from cabinets
Abstract
The invention discloses a liquid cooling heat dissipation system and a control method thereof, wherein the liquid cooling heat dissipation system comprises a control device, a heat exchanger, a cold source unit and a load unit, wherein the cold source unit and the load unit are respectively electrically connected with the control device; the load unit comprises a liquid return port, a liquid supply port, a change-over switch, a first circulating pump and a second circulating pump, one end of the change-over switch is connected with the liquid return port, and the other end of the change-over switch is respectively connected with the input end of the first circulating pump and the input end of the second circulating pump; the output end of the first circulating pump and the output end of the second circulating pump are respectively connected with the input end of the hot side of the heat exchanger, and the output end of the hot side of the heat exchanger is connected with the liquid supply port; the utility model discloses liquid cooling system, when first circulating pump breaks down, accessible change over switch fast switch over to the second circulating pump improves the stability of liquid cooling system during operation.
Description
Technical Field
The invention relates to the technical field of server heat dissipation equipment, in particular to a liquid cooling heat dissipation system and a control method thereof.
Background
The data center uses a large number of devices such as servers, the core devices of the servers are semiconductor devices, the heat productivity is large in the working process, and the driving power required by the CPU is multiplied along with the rapid increase of the operation speed of the CPU; in order to solve the problem of heat dissipation and temperature reduction and ensure the normal work of a server CPU, the prior art applies a liquid cooling technology to realize the cooling of a data center.
The liquid cooling technology utilizes the specific heat capacity and the convection heat transfer capacity of liquid which are far greater than those of air, and the heat of an electronic chip product is quickly taken away by the liquid in a mode that the liquid directly contacts the electronic chip or indirectly contacts the electronic chip through high-heat-conduction materials such as metal and the like; the liquid cooling technology can effectively solve the heat dissipation problem of ultrahigh heat flux density, greatly reduce the core temperature of the chip, improve the reliability of the chip during working and prolong the service life of the chip.
The liquid cooling technology on the load side of the server is generally divided into an indirect cold plate type, a direct cold plate type, an immersion type and the like according to the structural design; because of the liquid cooling heat dissipation characteristic, the load side heat exchange working medium is required to meet the continuous and uninterrupted characteristic, and the circulating pump is used as a main operation part of the system, once the circulating pump fails, the problem that the CPU (central processing unit) of the liquid cooling server is shut down due to overhigh temperature is easy to occur.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a liquid cooling heat dissipation system, which can be quickly switched to a second circulation pump by a switch when a failure occurs in a first circulation pump, so as to improve the stability of the liquid cooling heat dissipation system during operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a liquid cooling heat dissipation system comprises a control device, a heat exchanger, a cold source unit and a load unit, wherein the cold source unit and the load unit are respectively electrically connected with the control device; the load unit comprises a liquid return port, a liquid supply port, a change-over switch, a first circulating pump and a second circulating pump, one end of the change-over switch is connected with the liquid return port, and the other end of the change-over switch is respectively connected with the input end of the first circulating pump and the input end of the second circulating pump; the output end of the first circulating pump and the output end of the second circulating pump are respectively connected with the hot side input end of the heat exchanger, and the hot side output end of the heat exchanger is connected with the liquid supply port.
In the liquid cooling heat radiation system, the cold source unit comprises a cold source inlet, a cold source outlet, a first filter and a cold source regulating valve, wherein the cold source inlet is connected with the input end of the first filter, the output end of the first filter is connected with the input end of the cold source regulating valve, the output end of the cold source regulating valve is connected with the cold side input end of the heat exchanger, and the cold side output end of the heat exchanger is connected with the cold source outlet; the cold source regulating valve is electrically connected with the control device.
In the liquid cooling heat dissipation system, the cold source unit further comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a first temperature sensor and a second temperature sensor which are electrically connected with the control device respectively; the first pressure sensor is arranged on a liquid inlet pipeline of the first filter; the second pressure sensor is arranged on the liquid outlet pipeline of the first filter; the third pressure sensor is arranged on a liquid inlet pipeline at the cold side input end; the fourth pressure sensor is arranged on a liquid outlet pipe at the output end of the cold side; the fifth pressure sensor is arranged on a liquid inlet pipeline of the cold source outlet; the first temperature sensor is arranged on the liquid outlet pipeline of the cold source inlet; and the second temperature sensor is arranged on the liquid outlet pipe at the output end of the cold side.
In the liquid cooling heat dissipation system, the load unit further comprises a differential pressure regulating valve and a differential pressure sensor which are electrically connected with the control device respectively; one end of the differential pressure regulating valve is connected with the liquid return port, and the other end of the differential pressure regulating valve is connected with the liquid supply port; the differential pressure sensor is used for detecting the liquid pressure difference between the liquid supply port and the liquid return port.
In the liquid cooling heat radiation system, the load unit further comprises an expansion tank, a first one-way valve, a second one-way valve, a safety valve and a second filter, the liquid return port is connected with the input end of the expansion tank, and the output end of the expansion tank is respectively connected with the input end of the first circulating pump and the input end of the second circulating pump; the output end of the first circulating pump is connected with the input end of the first one-way valve, the output end of the second circulating pump is connected with the input end of the second one-way valve, and the output end of the first one-way valve and the output end of the second one-way valve are respectively connected with the input end of the safety valve; the output end of the safety valve is connected with the input end of the hot side, the output end of the hot side is connected with the input end of the second filter, and the output end of the second filter is connected with the liquid supply port.
In the liquid cooling heat dissipation system, the load unit further comprises a sixth pressure sensor, a seventh pressure sensor, an eighth pressure sensor, a ninth pressure sensor, a third temperature sensor and a fourth temperature sensor which are electrically connected with the control device respectively; the sixth pressure sensor is arranged on the liquid outlet pipeline of the liquid return port; the seventh pressure sensor is arranged on the liquid outlet pipeline of the safety valve; the eighth pressure sensor is arranged on a liquid inlet pipeline of the second filter, and the ninth pressure sensor is arranged on a liquid outlet pipeline of the second filter; the third temperature sensor is arranged on an outlet pipeline of the liquid return port, and the fourth temperature sensor is arranged on an inlet pipeline of the liquid supply port.
The invention also correspondingly provides a control method of the liquid cooling heat dissipation system, which is used for realizing the working control of any one of the liquid cooling heat dissipation systems; the control method comprises the following steps:
when the control device detects that the first circulating pump is abnormally stopped, the control device controls the change-over switch to be switched to the second circulating pump;
the control device records the rotating speed of the first circulating pump when the first circulating pump stops, and records the rotating speed as a first rotating speed;
the control device controls the second circulating pump to increase a certain rotating speed every second, so that the second rotating speed of the second circulating pump is quickly increased to be equal to the first rotating speed within a certain time.
In the control method of the liquid cooling heat dissipation system, the cold source unit comprises a cold source regulating valve for regulating the amount of the cold source in the heat exchanger, the load unit also comprises a fourth temperature sensor, and the fourth temperature sensor is arranged on an inlet pipeline of the liquid supply port; the control method further comprises the steps of:
the control device acquires the real-time liquid supply temperature fed back by the fourth temperature sensor;
the control device is internally preset with a maximum liquid supply value and a minimum liquid supply value;
the control device respectively compares the real-time liquid supply temperature with the maximum liquid supply value and the real-time liquid supply temperature with the minimum liquid supply value, and adjusts the opening of the cold source adjusting valve according to the comparison result.
In the control method of the liquid cooling heat dissipation system, the load unit further comprises a differential pressure regulating valve and a differential pressure sensor; two ends of the differential pressure regulating valve are respectively connected with the liquid return port and the liquid supply port; the pressure difference sensor is used for detecting the liquid pressure difference between the liquid supply port and the liquid return port; the control method further comprises the steps of:
the control device is internally preset with a highest pressure difference value and a lowest pressure difference value;
the control device acquires a real-time differential pressure value fed back by the differential pressure sensor;
the control device respectively compares the real-time pressure difference value with the highest pressure difference value and the real-time pressure difference value with the lowest pressure difference value, and adjusts the operating frequency of the first circulating pump or the second circulating pump and the opening of the pressure difference adjusting valve according to the comparison result.
In the control method of the liquid cooling heat dissipation system, the liquid cooling heat dissipation system further comprises a temperature and humidity sensor; the control method further comprises the steps of:
the control device calculates the real-time dew point temperature of the environment according to the real-time numerical values fed back by the temperature and humidity sensor;
the control device compares the real-time dew point temperature with the real-time liquid supply temperature and adjusts the opening of the cold source regulating valve according to the comparison result.
Has the advantages that:
the invention provides a liquid cooling heat dissipation system which comprises a first circulating pump and a second circulating pump which are connected in parallel, wherein when the first circulating pump or the second circulating pump is abnormally shut down, a control device triggers a change-over switch to quickly switch to the second circulating pump or the first circulating pump, so that the working stability of the liquid cooling heat dissipation system is improved, and the heat dissipation effect of the liquid cooling heat dissipation system on a machine room is ensured.
Drawings
Fig. 1 is a schematic view of a first structure of a liquid-cooling heat dissipation system according to the present invention;
fig. 2 is a schematic diagram of a second structure of the liquid cooling heat dissipation system according to the present invention;
FIG. 3 is a first logic flow diagram of a control method provided by the present invention;
FIG. 4 is a second logic flow diagram of the control method provided by the present invention;
FIG. 5 is a third logic flow diagram of a control method provided by the present invention;
fig. 6 is a fourth logic flow diagram of the control method provided by the present invention.
Description of the main element symbols: 1-control device, 2-heat exchanger, 3-cold source unit, 311-cold source inlet, 312-cold source outlet, 32-first filter, 33-cold source regulating valve, 341-first pressure sensor, 342-second pressure sensor, 343-third pressure sensor, 344-fourth pressure sensor, 345-fifth pressure sensor, 346-first temperature sensor, 347-second temperature sensor, 348-first flowmeter, 4-load unit, 411-liquid return port, 412-liquid supply port, 42-change-over switch, 431-first circulation pump, 432-second circulation pump, 433-first check valve, 434-second check valve, 44-expansion tank, 45-safety valve, 46-second filter, 46-cold source inlet, 312-cold source outlet, 32-first filter, 33-cold source regulating valve, 341-first pressure sensor, 347-second pressure sensor, 348-first flow meter, 4-load unit, 411-liquid return port, 412-liquid supply port, 42-change-over switch, 431-first circulation pump, 432-second circulation pump, 433-first check valve, 434-second check valve, 44-expansion tank, 45-safety valve, 46-second filter, and, 471-sixth pressure sensor, 472-seventh pressure sensor, 473-eighth pressure sensor, 474-ninth pressure sensor, 475-third temperature sensor, 476-fourth temperature sensor, 477-second flow meter, 481-differential pressure regulating valve, 482-differential pressure sensor, 49-third one-way valve.
Detailed Description
The invention provides a liquid cooling heat dissipation system and a control method thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and the like are to be interpreted broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1 and fig. 2, the present invention provides a liquid cooling heat dissipation system, including a control device 1, a heat exchanger 2, and a cold source unit 3 and a load unit 4 electrically connected to the control device 1, respectively, wherein the cold source unit 3 is connected to a cold side of the heat exchanger 2, and the cold source unit 3 is used for providing a cold source for the load unit 4; the load unit 4 comprises a liquid return port 411, a liquid supply port 412, a switch 42, a first circulating pump 431 and a second circulating pump 432, one end of the switch 42 is connected with the liquid return port 411, and the other end of the switch 42 is respectively connected with the input end of the first circulating pump 431 and the input end of the second circulating pump 432; the output end of the first circulating pump 431 and the output end of the second circulating pump 432 are respectively connected with the input end of the hot side of the heat exchanger 2, and the output end of the hot side of the heat exchanger 2 is connected with the liquid supply port 412; when the liquid cooling heat dissipation system is working normally, only the first circulation pump 431 or only the second circulation pump 432 is in working state.
The application discloses liquid cooling system, first circulating pump 431 and second circulating pump 432 including parallel connection, when the unusual shut down condition appears in first circulating pump 431 or second circulating pump 432, controlling means 1 does not receive the shutdown instruction and first circulating pump 431 or second circulating pump 432 during the stop work promptly, controlling means 1 triggers change over switch 42, fast switch over to second circulating pump 432 or first circulating pump 431, the reaction switching time has been shortened, the stability of liquid cooling system during operation has been improved, ensure the radiating effect of liquid cooling system to the computer lab.
Further, referring to fig. 1 and 2, the cold source unit 3 includes a cold source inlet 311, a cold source outlet 312, a first filter 32 and a cold source adjusting valve 33, wherein the cold source inlet 311 is connected to an input end of the first filter 32, an output end of the first filter 32 is connected to an input end of the cold source adjusting valve 33, an output end of the cold source adjusting valve 33 is connected to a cold side input end of the heat exchanger 2, and a cold side output end of the heat exchanger 2 is connected to the cold source outlet 312; the cold source adjusting valve 33 is electrically connected with the control device 1; in one embodiment, the cool source adjusting valve 33 may be a two-way adjusting valve or a three-way adjusting valve.
Further, referring to fig. 1 and 2, the cool source unit 3 further includes a first pressure sensor 341, a second pressure sensor 342, a third pressure sensor 343, a fourth pressure sensor 344, a fifth pressure sensor 345, a first temperature sensor 346, and a second temperature sensor 347 electrically connected to the control device 1, respectively; the first pressure sensor 341 is disposed on the liquid inlet pipeline of the first filter 32; the second pressure sensor 342 is disposed on the outlet pipe of the first filter 32; the third pressure sensor 343 is arranged on the liquid inlet pipeline at the cold side input end; the fourth pressure sensor 344 is arranged on a liquid outlet pipe at the cold side output end; the fifth pressure sensor 345 is arranged on the liquid inlet pipeline of the cold source outlet 312; the first temperature sensor 346 is arranged on the liquid outlet pipe of the cold source inlet 311; the second temperature sensor 347 is arranged on a liquid outlet pipe at the output end of the cold side; a first pressure sensor 341 and a second pressure sensor 342 are arranged for detecting the flow resistance of the first filter 32 in and out of the position, so as to avoid the problem of blockage of the first filter 32; the third pressure sensor 343 and the fourth pressure sensor 344 are arranged for detecting the flow resistance of the cold source side inlet and outlet position of the heat exchanger 2, so that the problem of cold source side blockage of the heat exchanger 2 is avoided, and the working stability of the liquid cooling heat dissipation system is improved; the fifth pressure sensor 345 is arranged, so that the control device 1 can judge the total flow resistance of the cold source unit 3 during working according to the difference value between the value fed back by the first pressure sensor 341 and the value fed back by the fifth pressure sensor 345, thereby realizing fault early warning and improving the safety of the liquid cooling heat dissipation system during working; the first temperature sensor 346 and the second temperature sensor 347 are arranged to detect the inlet temperature and the outlet temperature of the cold source unit 3, so that the control device 1 can know the cooling amount on the cold source side of the heat exchanger 2 conveniently; in one embodiment, the first temperature sensor 346 and the second temperature sensor 347 may be embedded plug-in sensors or externally applied temperature-sensing sensors.
Further, referring to fig. 1 and fig. 2, the cold source unit 3 further includes a first flow meter 348, the first flow meter 348 is disposed on the liquid outlet pipe of the cold source detection output end of the heat exchanger 2, and the first flow meter 348 is configured to monitor the liquid output amount of the cold source unit 3; in one embodiment, the first flow meter 348 may be a vortex shedding meter, a turbine flow meter, or an ultrasonic flow meter.
Further, referring to fig. 1 and fig. 2, the load unit 4 further includes a differential pressure regulating valve 481 and a differential pressure sensor 482, which are electrically connected to the control device 1, respectively; one end of the differential pressure regulating valve 481 is connected to the liquid return port 411, and the other end of the differential pressure regulating valve 481 is connected to the liquid supply port 412; the differential pressure sensor 482 is configured to detect a liquid pressure difference between the liquid supply port 412 and the liquid return port 411; the differential pressure sensor 482 and the differential pressure regulating valve 481 are arranged, so that the control device 1 can adjust the operating frequency of the first circulating pump 431 or the second circulating pump 432 and adjust the opening of the differential pressure regulating valve 481 according to the real-time differential pressure value fed back by the differential pressure sensor 482, the stability of the differential pressure between the liquid return port 411 and the liquid supply port 412 is ensured, and the stability of the liquid cooling heat dissipation system during operation is improved.
Further, referring to fig. 1 and fig. 2, the load unit 4 further includes an expansion tank 44, a first check valve 433, a second check valve 434, a safety valve 45, and a second filter 46, the liquid return port 411 is connected to an input end of the expansion tank 44, and an output end of the expansion tank 44 is connected to an input end of the first circulation pump 431 and an input end of the second circulation pump 432, respectively; the output end of the first circulating pump 431 is connected with the input end of the first check valve 433, the output end of the second circulating pump 432 is connected with the input end of the second check valve 434, and the output end of the first check valve 433 and the output end of the second check valve 434 are respectively connected with the input end of the safety valve 45; the output end of the safety valve 45 is connected with the input end of the hot side, the output end of the hot side is connected with the input end of the second filter 46, and the output end of the second filter 46 is connected with the liquid supply port 412; the expansion tank 44 functions as a pressure stabilizer, and the internal pre-charge pressure of the expansion tank 44 is lower than the inlet pressure when the first circulation pump 431 or the second circulation pump 432 is normally operated.
Further, referring to fig. 1 and fig. 2, the load unit 4 further includes a sixth pressure sensor 471, a seventh pressure sensor 472, an eighth pressure sensor 473, a ninth pressure sensor 474, a third temperature sensor 475, and a fourth temperature sensor 476 electrically connected to the control device 1, respectively; the sixth pressure sensor 471 is arranged on the liquid outlet pipeline of the liquid return port 411; the seventh pressure sensor 472 is disposed on the liquid outlet pipe of the safety valve 45; the eighth pressure sensor 473 is disposed on the inlet line of the second filter 46, and the ninth pressure sensor 474 is disposed on the outlet line of the second filter 46; the third temperature sensor 475 is disposed on an outlet pipeline of the liquid return port 411, and the fourth temperature sensor 476 is disposed on an inlet pipeline of the liquid supply port 412; a sixth pressure sensor 471 and a seventh pressure sensor 472 are arranged for detecting the flow resistance of the second filter 46 at the inlet and outlet positions, so that the problem of blockage of the second filter 46 is avoided; an eighth pressure sensor 473 and a ninth pressure sensor 474 are provided for detecting the flow resistance at the heat source side entry position of the heat exchanger 2, so that the problem of heat source side blockage of the heat exchanger 2 is avoided, and the working stability of the liquid cooling heat dissipation system is improved; a third temperature sensor 475 and a fourth temperature sensor 476 are arranged to feed back the liquid inlet temperature of the liquid return port 411 and the liquid outlet temperature of the liquid supply port 412 to the control device 1 in real time, so that the control device 1 can dynamically adjust the working state of the liquid cooling heat dissipation system conveniently; in one embodiment, the third temperature sensor 475 and the fourth temperature sensor 476 may be embedded plug-in sensors or external application temperature-sensing sensors.
Further, referring to fig. 1 and fig. 2, the load cell 4 further includes a second flow meter 477, the second flow meter 477 is disposed in a liquid outlet pipe of the heat source side output end of the heat exchanger 2, the second flow meter 477 is disposed in a connecting pipe between the other end of the differential pressure regulating valve 481 and the liquid supply port 412, and the second flow meter 477 is configured to monitor a liquid output amount of the load cell 4; in one embodiment, the second flow meter 477 may be a vortex shedding flow meter, a turbine flow meter, or an ultrasonic flow meter.
Further, referring to fig. 1, the load unit further includes a third check valve 49, and the third check valve 49 is disposed on a connection pipeline between the fourth temperature sensor 476 and the liquid supply port 412; when a plurality of liquid cooling heat dissipation systems disclosed by the application are used in parallel, if one of the liquid cooling heat dissipation systems is shut down or fails, the third check valve 49 can prevent liquid output by other liquid cooling heat dissipation systems from entering the liquid cooling heat dissipation system, so that the judgment work of a sensor and the daily maintenance work of the liquid cooling heat dissipation system are prevented from being influenced by the externally input liquid, and the stability and the safety of the liquid cooling heat dissipation system during working are improved.
Referring to fig. 3 to fig. 6, the present invention further provides a control method of a liquid cooling system, where the control method is used to implement the working control of any one of the above liquid cooling systems; the control method comprises the following steps:
s101, when the control device 1 detects that the first circulating pump 431 is abnormally stopped, the control device 1 controls the change-over switch 42 to be switched to the second circulating pump 432;
s102, the control device 1 records the rotating speed of the first circulating pump 431 during the shutdown, and records the rotating speed as a first rotating speed;
s103, the control device 1 controls the second circulating pump 432 to increase a certain rotating speed per second, so that the second rotating speed of the second circulating pump 432 is quickly increased to be equal to the first rotating speed within a certain time; in one embodiment, the control device 1 controls the second circulation pump 432 to increase the rotation speed by 10% per second, and the certain time is 10 seconds.
The control method disclosed by the application can realize the quick switching of the first circulating pump 431 and the second circulating pump 432 under the emergency, improve the stability of the liquid cooling heat dissipation system during working, and ensure the heat dissipation effect of the liquid cooling heat dissipation system on a machine room.
In one embodiment, the control method further comprises the steps of:
s104, when the polling condition preset in the control device 1 is reached and the first circulation pump 431 is in the working state, executing step S105; in one embodiment, the polling condition may be an operation time period of the first circulation pump 431 or the second circulation pump 432, which may be defined by staff according to an actual working environment; the working time is not less than 1 hour at least and not more than 30 days at most.
S105, the control device 1 controls the change-over switch 42 to conduct the first circulating pump 431 and the second circulating pump 432, the control device 1 controls the rotating speed of the first circulating pump 431 to be gradually reduced, and the rotating speed of the second circulating pump 432 is adjusted according to the real-time differential pressure value; specifically, the control device 1 controls the rotation speed of the first circulation pump 431 to be gradually reduced by X%, and when the rotation speed of the first circulation pump 431 is reduced by X%, the control device 1 obtains a real-time differential pressure value and compares the real-time differential pressure value with a preset suitable differential pressure value; the control device 1 adjusts the rotating speed of the second circulating pump 432 according to the PID adjusting parameter of 8/60/0, so that the real-time differential pressure value is consistent with the preset differential pressure proper value; when the real-time differential pressure value is consistent with the proper differential pressure value, the control device 1 controls the rotating speed of the first circulating pump 431 to be reduced by X%; the steps are circulated until the rotating speed of the first circulating pump 431 is reduced to zero, so that the smooth switching of the first circulating pump 431 and the second circulating pump 432 is realized, the stable working of the liquid cooling heat dissipation system under the normal condition is ensured, and the system fluctuation caused by too fast adjustment is avoided; in one embodiment, the value of X may be 3, for example, when the current rotation speed of the first circulation pump 431 is 95%, and when the real-time differential pressure value is consistent with the suitable differential pressure value, the control device 1 controls the rotation speed of the first circulation pump 431 to decrease to 92%.
When the polling condition preset in the control device 1 is reached and the second circulation pump 432 is in the working state, the control device 1 controls the changeover switch 42 to conduct the first circulation pump 431 and the second circulation pump 432, the control device 1 controls the rotation speed of the second circulation pump 432 to be gradually reduced, and adjusts the rotation speed of the first circulation pump 431 according to the real-time differential pressure value; the second circulation pump 432 is smoothly switched to the first circulation pump 431 in the same manner as the first circulation pump 431 is smoothly switched to the second circulation pump 432.
Further, referring to fig. 4, the cold source unit 3 includes a cold source adjusting valve 33 for adjusting the amount of the cold source in the heat exchanger 2, the load unit 4 further includes a fourth temperature sensor 476, and the fourth temperature sensor 476 is disposed on the inlet pipeline of the liquid supply port 412; the control method further comprises the steps of:
s210, the control device 1 acquires the real-time liquid supply temperature fed back by the fourth temperature sensor 476;
s220, presetting a highest liquid supply value and a lowest liquid supply value in the control device 1; the maximum liquid supply value and the minimum liquid supply value can be limited by workers according to the working environment of the liquid cooling heat dissipation system; in addition, the operator can also input the set value of the liquid supply to the control device, and the built-in program of the control device automatically forms the maximum value and the minimum value of the liquid supply, for example, if the built-in program limits the fluctuation of the temperature of the liquid supply to be +/-1 ℃, if the input set value of the liquid supply is 35 ℃, the maximum value of the liquid supply is 36 ℃, and the minimum value of the liquid supply is 34 ℃.
S230, the control device 1 respectively compares the real-time liquid supply temperature with the maximum liquid supply value and the real-time liquid supply temperature with the minimum liquid supply value, and adjusts the opening of the cold source adjusting valve 33 according to the comparison result.
In one embodiment, the step S230 specifically includes the steps of:
s231, when the real-time liquid supply temperature is larger than or equal to the maximum liquid supply value, the control device 1 increases the opening degree of the cold source regulating valve 33 according to the PID regulating parameter of 5/30/30;
s232, when the real-time liquid supply temperature is less than or equal to the minimum liquid supply value, the control device 1 adjusts the opening degree of the cold source adjusting valve 33 to be smaller according to the PID adjusting parameter of 5/30/30;
and S233, when the minimum liquid supply value is less than the real-time liquid supply temperature and less than the maximum liquid supply value, the control device 1 controls the opening of the cold source regulating valve 33 to be kept unchanged.
The control device 1 adjusts the opening degree of the cold source regulating valve 33 according to the real-time liquid supply temperature, ensures the proper temperature of the liquid output by the load unit 4, and improves the stability of the load unit 4 during working.
Further, referring to fig. 5, the load cell 4 further includes a differential pressure regulating valve 481 and a differential pressure sensor 482; two ends of the differential pressure regulating valve 481 are respectively connected with the liquid return port 411 and the liquid supply port 412; the differential pressure sensor 482 is used for detecting the liquid pressure difference between the liquid supply port 412 and the liquid return port 411; the control method further comprises the steps of:
s310, presetting a pressure difference highest value and a pressure difference lowest value in the control device 1; the pressure difference highest value and the pressure difference lowest value can be limited by workers according to the working environment of the liquid cooling heat dissipation system; in addition, the worker can also input a set pressure difference value to the control device, and a built-in program of the control device automatically forms a highest pressure difference value and a lowest pressure difference value; for example, if the built-in program defines the pressure difference fluctuation to be ± 0.05bar, if the input pressure difference set value is 0.9bar, the maximum value of the pressure difference is 0.95bar, and the minimum value of the pressure difference is 0.85 bar.
S320, the control device 1 acquires a real-time differential pressure value fed back by the differential pressure sensor 482;
s330, the control device 1 compares the real-time pressure difference value with the highest pressure difference value and compares the real-time pressure difference value with the lowest pressure difference value, and adjusts the operating frequency of the first circulating pump 431 or the second circulating pump 432 and the opening of the pressure difference adjusting valve 481 according to the comparison result.
In one embodiment, the step S330 specifically includes the steps of:
s331, when the real-time pressure difference value is less than or equal to the minimum pressure difference value, the control device 1 judges whether the pressure difference regulating valve 481 is in a closed state; if the differential pressure regulating valve 481 is in an open state, the control device 1 reduces the opening degree of the differential pressure regulating valve 481 by using the PID regulating parameter of 8/60/0; if the pressure difference regulating valve 481 is in a closed state, the control device 1 increases the operating frequency of the first circulating pump 431 or the second circulating pump 432 by the PID regulating parameter of 8/60/0;
s332, when the real-time pressure difference value is larger than or equal to the pressure difference highest value, the control device 1 judges whether the running frequency of the first circulating pump 431 or the second circulating pump 432 is consistent with a preset lowest frequency; if the difference is not consistent, the control device 1 reduces the step-by-step running frequency of the first circulating pump 431 or the second circulating pump 432 according to the PID adjustment parameter of 8/60/0; if the difference is consistent with the preset value, the control device 1 increases the opening degree of the differential pressure regulating valve 481 by using the PID regulating parameter of 8/60/0;
s333, when the lowest value of the pressure difference is less than the real-time pressure difference value and less than the highest value of the pressure difference, the control device 1 controls the running frequency of the first circulating pump 431 or the second circulating pump 432 to be kept unchanged, and controls the pressure difference regulating valve 481 to be kept unchanged in working state.
The control device 1 stabilizes the pressure difference between the liquid return port 411 and the liquid supply port 412 of the load unit 4 by adjusting the rotation speed of the first circulation pump 431 or the second circulation pump 432 and adjusting the opening of the pressure difference adjusting valve 481, thereby improving the stability of the liquid cooling heat dissipation system during operation.
Further, referring to fig. 6, the liquid cooling heat dissipation system further includes a temperature and humidity sensor; the control method further comprises the steps of:
s410, the control device 1 calculates the real-time dew point temperature of the environment according to the real-time numerical values fed back by the temperature and humidity sensor; the temperature and humidity sensor is arranged in a working environment of the liquid cooling heat dissipation system;
and S420, comparing the real-time dew point temperature with the real-time liquid supply temperature by the control device 1, and adjusting the opening degree of the cold source adjusting valve 33 according to the comparison result.
In one embodiment, the step S420 specifically includes the steps of:
s421, when the real-time dew point temperature is less than the real-time liquid supply temperature of minus 3 ℃, the control device 1 controls and adjusts the opening of the cold source regulating valve 33 to ensure that the real-time liquid supply temperature falls into the range of the lowest liquid supply value and the highest liquid supply value;
s422, when the real-time dew point temperature is larger than or equal to the real-time liquid supply temperature of minus 3 ℃, recording the real-time dew point temperature meeting the conditions, and setting the real-time dew point temperature as T1; the control device 1 controls and adjusts the opening of the cold source regulating valve 33 to ensure that the real-time liquid supply temperature is not less than T1+5 ℃ and not more than T1+7 ℃;
s423, when the real-time liquid supply temperature is more than or equal to T1+5 ℃ and the holding time is more than or equal to the preset time, the control device 1 controls and adjusts the opening of the cold source adjusting valve 33 to enable the real-time liquid supply temperature to fall within the range of the lowest liquid supply value and the highest liquid supply value; in one embodiment, the predetermined time is 3 minutes.
The control device 1 adjusts the opening degree of the cold source adjusting valve 33 according to the comparison result of the real-time dew point temperature and the real-time liquid supply temperature, so that the problem of condensation of the load unit 4 in the working process is solved, and the working stability and safety of the liquid cooling heat dissipation system are improved.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (10)
1. The liquid cooling heat dissipation system comprises a control device, and is characterized by further comprising a heat exchanger, a cold source unit and a load unit, wherein the cold source unit and the load unit are respectively electrically connected with the control device; the load unit comprises a liquid return port, a liquid supply port, a change-over switch, a first circulating pump and a second circulating pump, one end of the change-over switch is connected with the liquid return port, and the other end of the change-over switch is respectively connected with the input end of the first circulating pump and the input end of the second circulating pump; the output end of the first circulating pump and the output end of the second circulating pump are respectively connected with the hot side input end of the heat exchanger, and the hot side output end of the heat exchanger is connected with the liquid supply port.
2. The liquid cooling heat dissipation system of claim 1, wherein the cold source unit comprises a cold source inlet, a cold source outlet, a first filter and a cold source regulating valve, the cold source inlet is connected to an input end of the first filter, an output end of the first filter is connected to an input end of the cold source regulating valve, an output end of the cold source regulating valve is connected to a cold side input end of a heat exchanger, and a cold side output end of the heat exchanger is connected to the cold source outlet; the cold source regulating valve is electrically connected with the control device.
3. The liquid-cooled heat dissipation system of claim 2, wherein the cold source unit further comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a first temperature sensor and a second temperature sensor, which are electrically connected to the control device, respectively; the first pressure sensor is arranged on a liquid inlet pipeline of the first filter; the second pressure sensor is arranged on the liquid outlet pipeline of the first filter; the third pressure sensor is arranged on a liquid inlet pipeline at the cold side input end; the fourth pressure sensor is arranged on a liquid outlet pipe at the output end of the cold side; the fifth pressure sensor is arranged on a liquid inlet pipeline of the cold source outlet; the first temperature sensor is arranged on the liquid outlet pipeline of the cold source inlet; and the second temperature sensor is arranged on the liquid outlet pipe at the output end of the cold side.
4. The liquid-cooled heat dissipation system of claim 1, wherein the load unit further comprises a differential pressure regulating valve and a differential pressure sensor electrically connected to the control device, respectively; one end of the differential pressure regulating valve is connected with the liquid return port, and the other end of the differential pressure regulating valve is connected with the liquid supply port; the differential pressure sensor is used for detecting the liquid pressure difference between the liquid supply port and the liquid return port.
5. The liquid-cooled heat dissipation system of claim 4, wherein the load unit further comprises an expansion tank, a first check valve, a second check valve, a safety valve, and a second filter, the liquid return port is connected to an input end of the expansion tank, and an output end of the expansion tank is connected to an input end of the first circulation pump and an input end of the second circulation pump, respectively; the output end of the first circulating pump is connected with the input end of the first one-way valve, the output end of the second circulating pump is connected with the input end of the second one-way valve, and the output end of the first one-way valve and the output end of the second one-way valve are respectively connected with the input end of the safety valve; the output end of the safety valve is connected with the input end of the hot side, the output end of the hot side is connected with the input end of the second filter, and the output end of the second filter is connected with the liquid supply port.
6. The liquid-cooled heat dissipation system of claim 5, wherein the load unit further comprises a sixth pressure sensor, a seventh pressure sensor, an eighth pressure sensor, a ninth pressure sensor, a third temperature sensor and a fourth temperature sensor electrically connected to the control device, respectively; the sixth pressure sensor is arranged on the liquid outlet pipeline of the liquid return port; the seventh pressure sensor is arranged on the liquid outlet pipeline of the safety valve; the eighth pressure sensor is arranged on a liquid inlet pipeline of the second filter, and the ninth pressure sensor is arranged on a liquid outlet pipeline of the second filter; the third temperature sensor is arranged on an outlet pipeline of the liquid return port, and the fourth temperature sensor is arranged on an inlet pipeline of the liquid supply port.
7. A control method of a liquid cooling heat dissipation system, wherein the control method is used for realizing the operation control of the liquid cooling heat dissipation system according to any one of claims 1 to 6; the control method comprises the following steps:
when the control device detects that the first circulating pump is abnormally stopped, the control device controls the change-over switch to be switched to the second circulating pump;
the control device records the rotating speed of the first circulating pump when the first circulating pump stops, and records the rotating speed as a first rotating speed;
the control device controls the second circulating pump to increase a certain rotating speed every second, so that the second rotating speed of the second circulating pump is quickly increased to be equal to the first rotating speed within a certain time.
8. The method as claimed in claim 7, wherein the cold source unit includes a cold source adjusting valve for adjusting the amount of cold source in the heat exchanger, and the load unit further includes a fourth temperature sensor disposed on an inlet pipe of the liquid supply port; the control method further comprises the steps of:
the control device acquires the real-time liquid supply temperature fed back by the fourth temperature sensor;
the control device is internally preset with a maximum liquid supply value and a minimum liquid supply value;
the control device respectively compares the real-time liquid supply temperature with the maximum liquid supply value and the real-time liquid supply temperature with the minimum liquid supply value, and adjusts the opening of the cold source adjusting valve according to the comparison result.
9. The method of claim 7, wherein the load unit further comprises a differential pressure regulating valve and a differential pressure sensor; two ends of the differential pressure regulating valve are respectively connected with the liquid return port and the liquid supply port; the pressure difference sensor is used for detecting the liquid pressure difference between the liquid supply port and the liquid return port; the control method further comprises the steps of:
the control device is internally preset with a highest pressure difference value and a lowest pressure difference value;
the control device acquires a real-time differential pressure value fed back by the differential pressure sensor;
the control device respectively compares the real-time pressure difference value with the highest pressure difference value and the real-time pressure difference value with the lowest pressure difference value, and adjusts the operating frequency of the first circulating pump or the second circulating pump and the opening of the pressure difference adjusting valve according to the comparison result.
10. The method of claim 8, wherein the liquid-cooled heat dissipation system further comprises a temperature and humidity sensor; the control method further comprises the steps of:
the control device calculates the real-time dew point temperature of the environment according to the real-time numerical values fed back by the temperature and humidity sensor; the control device compares the real-time dew point temperature with the real-time liquid supply temperature and adjusts the opening of the cold source regulating valve according to the comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425117.0A CN114158235A (en) | 2021-11-26 | 2021-11-26 | Liquid cooling heat dissipation system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425117.0A CN114158235A (en) | 2021-11-26 | 2021-11-26 | Liquid cooling heat dissipation system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114158235A true CN114158235A (en) | 2022-03-08 |
Family
ID=80458105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111425117.0A Withdrawn CN114158235A (en) | 2021-11-26 | 2021-11-26 | Liquid cooling heat dissipation system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114158235A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI811154B (en) * | 2022-11-11 | 2023-08-01 | 群光電能科技股份有限公司 | Rack with heat-dissipation system, power supply system for rack with heat-dissipation system, and power control system of rack heat-dissipation system |
-
2021
- 2021-11-26 CN CN202111425117.0A patent/CN114158235A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI811154B (en) * | 2022-11-11 | 2023-08-01 | 群光電能科技股份有限公司 | Rack with heat-dissipation system, power supply system for rack with heat-dissipation system, and power control system of rack heat-dissipation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10203128B2 (en) | Cold water circulation system with control of supply of cold water based on degree of air handler surplus | |
| EP2986097B1 (en) | Liquid cooling system and control method therefor | |
| US20220248571A1 (en) | Liquid Cooling Heat Dissipation System, Heat Dissipation Control Method, and Control Chip | |
| US9885489B2 (en) | HVAC systems | |
| CN103676998A (en) | Temperature control system and temperature control method thereof | |
| CN105302182B (en) | A kind of server liquid-cooling heat radiation energy-saving control system and method | |
| CN101922781A (en) | Controlled environment temperature and humidity regulation based air conditioner energy saving control method and system | |
| US11543148B2 (en) | Air conditioning system and control method therof | |
| CN111442438A (en) | System and control method for refrigerating machine room | |
| JP6644559B2 (en) | Heat source control system, control method and control device | |
| CN110767411A (en) | Transformer cooling device and operation monitoring system | |
| CN113784601A (en) | Liquid cooling heat dissipation system and control method thereof | |
| CN114158235A (en) | Liquid cooling heat dissipation system and control method thereof | |
| CN115843170A (en) | Energy-saving control system for air conditioner in machine room | |
| US10248142B2 (en) | Cooling apparatus, cooling method, and data processing system | |
| JP2002098358A (en) | Primary pump type heat source flow variable system | |
| CN110881262B (en) | Control method for cold source output capacity of liquid cooling system of data machine room | |
| JP4440147B2 (en) | Operation control method for two-pump heat source equipment | |
| JP2011226680A (en) | Cooling water producing facility | |
| CN209845599U (en) | Cooling device and server cabinet system | |
| CN218336875U (en) | Liquid cooling heat exchange system and data center | |
| CN109584950B (en) | Cooling system for instrument | |
| KR20170039114A (en) | Conveyance energy-saving control apparatus in HVAC equipment | |
| CN113363528A (en) | Fuel cell thermal management system and control method thereof | |
| JP2008180505A (en) | Cold water circulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220308 |