CN115097877B - Vaporization prevention control method for liquid cooling system and liquid cooling system - Google Patents
Vaporization prevention control method for liquid cooling system and liquid cooling system Download PDFInfo
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- CN115097877B CN115097877B CN202210688051.2A CN202210688051A CN115097877B CN 115097877 B CN115097877 B CN 115097877B CN 202210688051 A CN202210688051 A CN 202210688051A CN 115097877 B CN115097877 B CN 115097877B
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- 239000007788 liquid Substances 0.000 title claims abstract description 273
- 238000001816 cooling Methods 0.000 title claims abstract description 164
- 238000009834 vaporization Methods 0.000 title claims abstract description 90
- 230000008016 vaporization Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002265 prevention Effects 0.000 title claims abstract description 18
- 238000009835 boiling Methods 0.000 claims abstract description 65
- 230000001105 regulatory effect Effects 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims 1
- 239000000110 cooling liquid Substances 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a vaporization prevention control method of a liquid cooling system and the liquid cooling system, wherein the method comprises the following steps: calculating the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid return of the liquid cooling system; if the difference value between the real-time boiling point value and the real-time temperature value is smaller than a first preset threshold value and larger than or equal to a second preset threshold value, performing primary anti-vaporization control on the liquid cooling system; if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the second preset threshold value and larger than or equal to a third preset threshold value, performing secondary anti-vaporization control on the liquid cooling system; if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, performing three-stage anti-vaporization control on the liquid cooling system; according to the invention, the corresponding grade of anti-vaporization control is adopted according to the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid return, and different means are adopted to control the pressure and the temperature of the cooling liquid so as to prevent vaporization, so that the operation of the liquid cooling system is more reliable.
Description
Technical Field
The invention relates to the technical field of liquid cooling, in particular to a vaporization prevention control method of a liquid cooling system and the liquid cooling system.
Background
The liquid cooling system is usually operated at high water temperature, and the negative pressure liquid cooling system is additionally provided with low pressure, namely, the situation that the pressure of cooling liquid is low and the temperature is high exists on the secondary side when the negative pressure liquid cooling system is applied. For liquids, the lower the pressure, the lower the boiling point and the closer the temperature is to the boiling point, the easier it is to vaporize. Therefore, the liquid cooling system, particularly the negative pressure liquid cooling system, is liable to cause the problem of vaporization of the cooling liquid.
In fact, after the liquid is vaporized, the heat exchange efficiency of the liquid cooling system is affected, cavitation phenomenon can be caused in the use process of the liquid pump, fatal striking is caused to the normal use of the liquid pump, and the liquid cooling system can be possibly caused to be completely disabled, so that the liquid vaporization phenomenon of the liquid cooling system must be avoided as much as possible. However, the prior art has not been able to effectively solve the problem of vaporization of liquid in liquid cooling systems, particularly negative pressure liquid cooling systems.
Disclosure of Invention
The invention aims to provide a liquid cooling system vaporization prevention control method and a liquid cooling system, which are used for setting three grades of vaporization prevention control on the liquid cooling system, and adopting corresponding grades of vaporization prevention control on the liquid cooling system according to the difference value between the real-time boiling point value and the real-time temperature value of secondary side liquid return of the liquid cooling system, so that the pressure and the temperature of cooling liquid are reasonably controlled by adopting different vaporization prevention control means according to the degrees of cooling liquid at different grades to prevent the vaporization of the cooling liquid, and the liquid cooling system has higher operation reliability.
In order to achieve the above purpose, the invention discloses a liquid cooling system anti-vaporization control method, which comprises the following steps:
s1, calculating a difference value between a real-time boiling point value and a real-time temperature value of secondary side liquid return of a liquid cooling system;
s2, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than a first preset threshold value and larger than or equal to a second preset threshold value, performing primary anti-vaporization control on the liquid cooling system;
s3, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the second preset threshold value and larger than or equal to a third preset threshold value, performing secondary anti-vaporization control on the liquid cooling system;
and S4, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, performing three-stage anti-vaporization control on the liquid cooling system.
Compared with the prior art, the invention sets three grades of anti-vaporization control on the liquid cooling system, adopts corresponding grades of anti-vaporization control on the liquid cooling system according to the difference value of the real-time boiling point value and the real-time temperature value of the secondary side liquid return of the liquid cooling system, thereby adopting different anti-vaporization control means to reasonably control the pressure and the temperature of the cooling liquid to prevent the cooling liquid from vaporizing aiming at the cooling liquid degrees of different grades, and leading the liquid cooling system to have higher operation reliability.
Preferably, the counting step S1 further includes:
s101, collecting a real-time temperature value and a real-time pressure value of secondary side liquid return of the liquid cooling system;
s102, calculating the real-time boiling point value according to the real-time temperature value and the real-time pressure value.
Preferably, the step S2 further includes:
and S201, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a first preset threshold value and a first preset return difference value, the primary anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S2, the first-stage anti-vaporization control is performed on the liquid cooling system, and the method specifically includes the following steps:
s21, forcibly increasing the primary side flow rate of the liquid cooling system by a preset amplitude in each preset time so as to increase the heat exchange quantity of the primary side and the secondary side of the liquid cooling system.
Specifically, the step S21 specifically includes:
the opening of a primary side flow regulating valve of the liquid cooling system is forcedly increased by a preset amplitude in each preset time, so that the heat exchange quantity of the primary side and the secondary side of the liquid cooling system is increased.
Preferably, the step S3 further includes:
and S301, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a second preset threshold value and a second preset return difference value, the secondary anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S3, the second-stage anti-vaporization control is performed on the liquid cooling system, and the method specifically includes the following steps:
s31, adjusting the real-time pressure value of the secondary side liquid return of the liquid cooling system to adjust the real-time boiling point value of the secondary side liquid return of the liquid cooling system.
Specifically, the step S31 specifically includes:
opening a secondary side flow regulating valve;
and according to the real-time temperature value, the opening degree of the secondary side flow regulating valve is regulated through PID, so that the real-time pressure value of the secondary side liquid return of the liquid cooling system is increased, and the real-time boiling point value of the secondary side liquid return of the liquid cooling system is increased.
Preferably, the step S4 further includes:
s401, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a third preset threshold value and a third preset return difference value, the three-stage anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S4, the tertiary anti-vaporization control is performed on the secondary side liquid return of the liquid cooling system, and specifically includes the following steps:
s41, adjusting a real-time pressure value in a liquid storage tank of the secondary side liquid return of the liquid cooling system to adjust a real-time boiling point value of the secondary side liquid return of the liquid cooling system.
Specifically, the step S41 specifically includes:
when the real-time pressure value is lower than a first preset pressure threshold value, opening an electromagnetic valve connected to an air inlet of the liquid storage tank to introduce external air into a secondary side of the liquid cooling system, so that the real-time pressure value of secondary side liquid return of the liquid cooling system is increased;
and when the real-time pressure value is larger than a second preset pressure threshold value, increasing the running rotating speed of a vacuum pump connected to the air outlet of the liquid storage tank, so as to reduce the real-time pressure value of the secondary side liquid return of the liquid cooling system.
Correspondingly, the invention also discloses a liquid cooling system which is applied to the liquid cooling system steam-proof control method, wherein the liquid cooling system comprises a liquid storage tank, a heat exchanger, a circulating pump, a load, an electromagnetic valve, a vacuum pump, a primary side flow regulating valve, a first pressure sensor and a temperature sensor, the liquid storage tank, the heat exchanger, the circulating pump and the load are sequentially connected through a secondary side pipeline to form a secondary side circulating loop, the electromagnetic valve is connected to an air inlet of the liquid storage tank, an air suction port of the vacuum pump is connected to an air outlet of the liquid storage tank, and the secondary side flow regulating valve and the load are arranged in parallel and are connected to the secondary side circulating loop; the primary side flow regulating valve is connected to the primary side water outlet of the heat exchanger, the first pressure sensor is used for collecting the real-time pressure value of the secondary side liquid return of the liquid cooling system, and the temperature sensor is used for collecting the real-time temperature value of the secondary side liquid return of the liquid cooling system.
Preferably, the liquid cooling system further comprises a one-way valve and a second pressure sensor, wherein an inlet of the one-way valve is connected with an exhaust port of the liquid storage tank, an outlet of the one-way valve is connected with an air suction port of the vacuum pump, and the second pressure sensor is used for collecting real-time pressure values of the exhaust port of the liquid storage tank.
Drawings
FIG. 1 is a flow chart diagram of a liquid cooling system vaporization prevention control method of the present invention;
FIG. 2 is a schematic diagram of a liquid cooling system according to the present invention;
FIG. 3 is a logic control block diagram of the liquid cooling system vaporization prevention control method of the present invention.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
Referring to fig. 1-3, the vaporization prevention control method of the liquid cooling system of the present embodiment is suitable for a liquid cooling system, especially a negative pressure liquid cooling system, and the liquid cooling system includes a liquid storage tank 1, a heat exchanger 2, a circulating pump 3, a load 4, an electromagnetic valve 5, a vacuum pump 6, a primary side flow regulating valve 7, a first pressure sensor 8 and a temperature sensor 9, wherein the liquid storage tank 1, the heat exchanger 2, the circulating pump 3 and the load 4 are sequentially connected through secondary side pipelines to form a secondary side circulating loop, and a primary side of the heat exchanger 2 is connected through primary side pipelines to form a primary side circulating loop.
It can be understood that the heat exchanger 2 is a heat exchange component of a liquid cooling system, and the secondary side circulation loop and the primary side circulation loop exchange heat through the heat exchanger 2, so as to realize cooling of the load 4 by transferring heat of the secondary side circulation loop of the liquid cooling system. The load 4 is a server, and of course, the load 4 may be other types of heating devices, which will not be described herein.
The electromagnetic valve 5 is connected to the air inlet of the liquid storage tank 1, the air suction port of the vacuum pump 6 is connected to the air outlet of the liquid storage tank 1, and the secondary side flow regulating valve 12 is connected in parallel with the load 4 through a pipeline and is connected to the secondary side circulation loop. The primary side flow regulating valve 7 is connected to the primary side water outlet of the heat exchanger 2, the first pressure sensor 8 is used for collecting the real-time pressure value of the secondary side liquid return of the liquid cooling system, and the temperature sensor 9 is used for collecting the real-time temperature value of the secondary side liquid return of the liquid cooling system. The liquid storage tank 1 stores cooling liquid, and the cooling liquid circularly flows along the secondary side circulation loop. The cooling liquid may be water or other liquid having a high thermal conductivity.
Preferably, the liquid cooling system further comprises a one-way valve 10 and a second pressure sensor 11, wherein the one-way valve 10 is connected in series with the air suction port of the vacuum pump 6 and connected with the air discharge port of the liquid storage tank 1, and limits the liquid to flow to the air suction port of the vacuum pump 6 along the air discharge port of the liquid storage tank 1 in a one-way. The second pressure sensor 11 is used for collecting real-time pressure values of the exhaust port of the liquid storage tank 1.
The liquid cooling system vaporization prevention control method of the embodiment comprises the following steps:
s1, calculating a difference value between a real-time boiling point value and a real-time temperature value of secondary side liquid return of the liquid cooling system.
S2, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than a first preset threshold value and larger than or equal to a second preset threshold value, performing primary anti-vaporization control on the liquid cooling system.
And S3, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the second preset threshold value and larger than or equal to a third preset threshold value, performing secondary anti-vaporization control on the liquid cooling system.
And S4, if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, performing three-stage anti-vaporization control on the liquid cooling system.
It can be understood that the position where the liquid cooling system is most easily vaporized is the secondary side liquid return side, namely, the liquid cooling system can be ensured not to be vaporized as long as the cooling liquid on the secondary side liquid return side is controlled not to be vaporized. And the vaporization condition of the secondary liquid return side of the liquid cooling system can be determined by judging the difference value of the boiling points of the secondary liquid return side of the liquid cooling system under the corresponding conditions of the temperature and the pressure.
Aiming at different vaporization conditions of the secondary side liquid return side of the liquid cooling system, the embodiment is provided with three levels of protection control:
potential vaporization: when potential vaporization occurs on the secondary side liquid return side of the liquid cooling system (temporary vaporization does not exist, continuous operation has no influence on the system, but continuous deterioration has the risk of vaporization), the primary vaporization prevention control is performed on the liquid cooling system. Specifically, if the difference between the real-time boiling point value and the real-time temperature value is smaller than the first preset threshold value and larger than or equal to the second preset threshold value, the potential vaporization of the secondary liquid return side of the liquid cooling system can be judged.
Light vaporization: when the secondary side liquid return side of the liquid cooling system is slightly vaporized (slight vaporization is generated, a small amount of cooling liquid volatilizes into a gaseous state, and the device is damaged but not fatal when the operation is continued), the liquid cooling system is subjected to secondary anti-vaporization control. Specifically, if the difference between the real-time boiling point value and the real-time temperature value is smaller than the second preset threshold value and larger than or equal to the third preset threshold value, it can be judged that the liquid cooling system secondary side liquid return side is slightly vaporized.
Severe vaporization: when serious vaporization occurs on the secondary side liquid return side of the liquid cooling system (the vaporization phenomenon is serious, a large amount of cooling liquid volatilizes into a gaseous state, the reliability of the system is seriously affected, and devices are damaged when the operation is continued), the three-stage vaporization prevention control is performed. Specifically, if the difference between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, it can be judged that serious vaporization occurs on the secondary liquid return side of the liquid cooling system.
It should be noted that, the first preset threshold, the second preset threshold and the third preset threshold are preset parameters set according to experience, which are generally set fixedly according to different types of liquid cooling systems, and of course, when each parameter of the liquid cooling system is adjustable or each parameter of the liquid cooling system can be dynamically changed, the first preset threshold, the second preset threshold and the third preset threshold can be dynamically adjusted according to actual conditions, which is not limited herein.
In addition, the magnitude relation among the first preset threshold value, the second preset threshold value and the third preset threshold value is as follows: the first preset threshold value is larger than the second preset threshold value and larger than the third preset threshold value.
Preferably, before the step S1, the method further includes:
s101, collecting a real-time temperature value and a real-time pressure value of secondary side liquid return of the liquid cooling system.
S102, calculating the real-time boiling point value according to the real-time temperature value and the real-time pressure value.
It should be noted that, in the case of known temperature values and pressure values, the boiling point values may be obtained by calculation using clausius-clabelone equation, an Tuo factor equation or li-kesler equation, which will not be described herein.
Preferably, the step S2 further includes:
and S201, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a first preset threshold value and a first preset return difference value, the primary anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S2, the first-stage anti-vaporization control is performed on the liquid cooling system, and the method specifically includes the following steps:
s21, forcibly increasing the primary side flow rate of the liquid cooling system by a preset amplitude in each preset time so as to increase the heat exchange quantity of the primary side and the secondary side of the liquid cooling system.
Specifically, the step S21 specifically includes:
the opening of the primary side flow regulating valve 7 of the liquid cooling system is forcedly increased by a preset amplitude in each preset time to increase the heat exchange quantity of the primary side and the secondary side of the liquid cooling system. When the opening of the primary side flow regulating valve 7 is larger, the heat exchange amount of the primary side and the secondary side can be increased, so that the water supply temperature of the secondary side is reduced, the liquid return temperature of the secondary side is reduced simultaneously under the condition of unchanged heat load, namely, the boiling point difference value under the corresponding temperature and pressure of the liquid return of the secondary side is increased, and the vaporization risk is reduced.
Preferably, the step S3 further includes:
and S301, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a second preset threshold value and a second preset return difference value, the secondary anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S3, the second-stage anti-vaporization control is performed on the liquid cooling system, and the method specifically includes the following steps:
s31, adjusting the real-time pressure value of the secondary side liquid return of the liquid cooling system to adjust the real-time boiling point value of the secondary side liquid return of the liquid cooling system.
Specifically, the step S31 specifically includes:
opening the secondary side flow regulating valve 12;
and according to the real-time temperature value, the opening degree of the secondary side flow regulating valve 12 is regulated through PID so as to increase the real-time pressure value of the secondary side liquid return of the liquid cooling system and increase the real-time boiling point value of the secondary side liquid return of the liquid cooling system. Opening the secondary side flow regulating valve 12 can raise the pressure of the secondary side return liquid, and further raise the boiling point of the secondary side return liquid, i.e. the boiling point difference between the temperature and the pressure of the secondary side return liquid is increased, so as to reduce vaporization.
It can be understood that when the difference between the real-time boiling point value and the real-time temperature value is greater than the sum of the second preset threshold value and the second preset return difference value, after the secondary vaporization prevention control of the liquid cooling system is exited, when the difference between the real-time boiling point value and the real-time temperature value is less than or equal to the sum of the first preset threshold value and the first preset return difference value, the primary vaporization prevention control needs to be started to avoid potential vaporization of the secondary liquid return side of the liquid cooling system.
Preferably, the step S4 further includes:
s401, when the difference value between the real-time boiling point value and the real-time temperature value is larger than the sum of a third preset threshold value and a third preset return difference value, the three-stage anti-vaporization control of the liquid cooling system is stopped.
Preferably, in the step S4, the tertiary anti-vaporization control is performed on the secondary side liquid return of the liquid cooling system, and specifically includes the following steps:
s41, adjusting the real-time pressure value in the liquid storage tank 1 of the secondary side liquid return of the liquid cooling system to adjust the real-time boiling point value of the secondary side liquid return of the liquid cooling system.
It will be appreciated that when the vacuum pump 6 is operating stably, the real-time pressure value of the liquid storage tank 1 detected by the second pressure sensor 11 is approximately equal to the real-time pressure value of the liquid cooling system detected by the first pressure sensor 8, and the values are different from the pressure difference caused by the liquid level of the liquid storage tank 1 at most, but when the vacuum pump 6 is in the adjusting process, the real-time pressure value of the liquid cooling system detected by the first pressure sensor 8 has a problem of time delay synchronization, so when the real-time pressure value in the liquid storage tank 1 of the secondary side liquid return of the liquid cooling system is adjusted, the real-time pressure value of the liquid storage tank 1 can be reflected more accurately by directly selecting the detection value of the second pressure sensor 11, wherein 1bar is approximately equal to 1 standard atmospheric pressure.
Specifically, the step S41 specifically includes:
when the real-time pressure value is smaller than a first preset pressure threshold value (for example, 0.3 Bar), opening an electromagnetic valve 5 connected to an air inlet of the liquid storage tank 1 to introduce external air into a secondary side of the liquid cooling system, so that the real-time pressure value of secondary side liquid return of the liquid cooling system is increased, and the real-time boiling point value of secondary side liquid return of the liquid cooling system is increased;
when the real-time pressure value is greater than or equal to a first preset pressure threshold value and less than a second preset pressure threshold value (for example, 0.4 Bar), the operation rotating speed of the vacuum pump 6 is reduced, so that the real-time pressure value of secondary side liquid return of the liquid cooling system is increased, the liquid cooling system is kept to operate in a proper negative pressure range, and the liquid cooling system is prevented from operating in an excessively low pressure environment for a long time, so that ineffective work of the vacuum pump 6 and accelerated evaporation of cooling liquid are caused;
furthermore, when the electromagnetic valve 5 connected to the air inlet of the liquid storage tank 1 is opened, there may be an overshoot phenomenon of the air inlet, so that the real-time pressure value of the liquid storage tank 1 detected by the second pressure sensor 11 is too high, and when the real-time pressure value is greater than a third preset pressure threshold (e.g. 0.8 Bar), the operation rotation speed of the vacuum pump 6 connected to the air outlet of the liquid storage tank 1 is increased, so that the real-time pressure value of the secondary liquid return of the liquid cooling system is reduced, and the real-time boiling point value of the secondary liquid return of the liquid cooling system is reduced.
Note that, the values of the first preset return difference, the second preset return difference, and the third preset return difference in this embodiment may be different or the same, and are not limited herein.
In order to better illustrate the working process of the anti-vaporization control method of the liquid cooling system in this embodiment, the values of the first preset return difference, the second preset return difference and the third preset return difference are all set to be 2 ℃, and the following is illustrated by actual data:
if the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid is detected to be smaller than 15 ℃ and larger than or equal to 10 ℃, entering primary anti-vaporization control:
every 60s, forcibly opening the primary side flow regulating valve 7 by 10 percent until the difference value between the real-time boiling point value and the real-time temperature value is detected to be more than 17 ℃ (15 ℃ +2 ℃), and exiting the primary anti-vaporization control;
if the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid is detected to be smaller than 10 ℃ and larger than or equal to 6 ℃, entering secondary anti-vaporization control:
opening the secondary side flow regulating valve 12, regulating the opening of the secondary side flow regulating valve 12 according to PID, wherein the target opening value of the secondary side flow regulating valve 12 is that the secondary side liquid return temperature is returned to 14 ℃ (the target difference value of 12 ℃ which is larger than the target difference value of 12 ℃ which exits the secondary anti-vaporization control at the moment), until the difference value of the real-time boiling point value and the real-time temperature value is detected to be more than 12 ℃ (10 ℃ +2 ℃), and exiting the secondary anti-vaporization control;
if the difference value between the real-time boiling point value and the real-time temperature value is detected to be less than 6 ℃, entering three-stage anti-vaporization control:
and adjusting the power of the vacuum pump 6 to adjust the air suction amount of the vacuum pump 6, thereby adjusting the in-tank pressure of the liquid storage tank 1 to enable the in-tank pressure of the liquid storage tank 1 to reach a preset target pressure value, wherein the boiling point corresponding to the preset target pressure value is the current backwater temperature +10 ℃, until the difference between the real-time boiling point value and the real-time temperature value is detected to be more than 8 ℃ (6 ℃ +2 ℃), and exiting the three-stage anti-vaporization control.
According to the invention, three grades of anti-vaporization control are set for the liquid cooling system, and the corresponding grade of anti-vaporization control is adopted for the liquid cooling system according to the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid return of the liquid cooling system, so that the pressure and the temperature of the cooling liquid are reasonably controlled by adopting different anti-vaporization control means according to the degree of the cooling liquid at different grades, so that the cooling liquid is prevented from vaporizing, and the liquid cooling system has higher operation reliability.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (7)
1. The vaporization prevention control method of the liquid cooling system is characterized by comprising the following steps of:
calculating the difference value between the real-time boiling point value and the real-time temperature value of the secondary side liquid return of the liquid cooling system;
if the difference value between the real-time boiling point value and the real-time temperature value is smaller than a first preset threshold value and larger than or equal to a second preset threshold value, performing primary anti-vaporization control on the liquid cooling system;
if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the second preset threshold value and larger than or equal to a third preset threshold value, performing secondary anti-vaporization control on the liquid cooling system;
if the difference value between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, performing three-stage anti-vaporization control on the liquid cooling system;
the liquid cooling system performs primary anti-vaporization control, and specifically comprises the following steps:
forcibly increasing the primary side flow of the liquid cooling system by a preset amplitude in each preset time to increase the heat exchange quantity of the primary side and the secondary side of the liquid cooling system;
the secondary side liquid return of the liquid cooling system is used for performing secondary anti-vaporization control, and the method specifically comprises the following steps of:
the real-time pressure value of the secondary side liquid return of the liquid cooling system is adjusted to adjust the real-time boiling point value of the secondary side liquid return of the liquid cooling system;
the tertiary anti-vaporization control is carried out on secondary side liquid return of the liquid cooling system, and the method specifically comprises the following steps:
and adjusting the real-time pressure value in the liquid storage tank of the secondary side liquid return of the liquid cooling system to adjust the real-time boiling point value of the secondary side liquid return of the liquid cooling system.
2. The method for controlling vaporization of a liquid cooling system according to claim 1, wherein calculating the difference between the real-time boiling point value and the real-time temperature value of the secondary side liquid return of the liquid cooling system further comprises:
collecting a real-time temperature value and a real-time pressure value of secondary side liquid return of the liquid cooling system;
and calculating the real-time boiling point value according to the real-time temperature value and the real-time pressure value.
3. The method of claim 1, wherein the performing the primary anti-vaporization control on the liquid cooling system if the difference between the real-time boiling point value and the real-time temperature value is less than a first preset threshold and greater than or equal to a second preset threshold, further comprises:
and when the difference value of the real-time boiling point value and the real-time temperature value is larger than the sum of the first preset threshold value and the first preset return difference value, the primary anti-vaporization control of the liquid cooling system is stopped.
4. The method of claim 1, wherein the performing the second-stage anti-vaporization control on the liquid cooling system if the difference between the real-time boiling point value and the real-time temperature value is less than the second preset threshold and greater than or equal to a third preset threshold, further comprises:
and when the difference value of the real-time boiling point value and the real-time temperature value is larger than the sum of a second preset threshold value and a second preset return difference value, the secondary anti-vaporization control of the liquid cooling system is stopped.
5. The method of claim 1, wherein if the difference between the real-time boiling point value and the real-time temperature value is smaller than the third preset threshold value, performing three-stage anti-vaporization control on the liquid cooling system, further comprising:
and when the difference value of the real-time boiling point value and the real-time temperature value is larger than the sum of a third preset threshold value and a third preset return difference value, exiting the three-stage anti-vaporization control of the liquid cooling system.
6. A liquid cooling system applied to the liquid cooling system vaporization prevention control method according to any one of claims 1 to 5, characterized in that: the liquid cooling system comprises a liquid storage tank, a heat exchanger, a circulating pump, a load, an electromagnetic valve, a vacuum pump, a primary side flow regulating valve, a first pressure sensor and a temperature sensor, wherein the liquid storage tank, the heat exchanger, the circulating pump and the load are sequentially connected through a secondary side pipeline to form a secondary side circulating loop, the electromagnetic valve is connected into an air inlet of the liquid storage tank, an air suction port of the vacuum pump is connected into an air outlet of the liquid storage tank, and the secondary side flow regulating valve and the load are arranged in parallel and are connected into the secondary side circulating loop; the primary side flow regulating valve is connected to the primary side water outlet of the heat exchanger, the first pressure sensor is used for collecting the real-time pressure value of the secondary side liquid return of the liquid cooling system, and the temperature sensor is used for collecting the real-time temperature value of the secondary side liquid return of the liquid cooling system.
7. The liquid cooling system according to claim 6, wherein: the liquid cooling system further comprises a one-way valve and a second pressure sensor, wherein an inlet of the one-way valve is connected with an exhaust port of the liquid storage tank, an outlet of the one-way valve is connected with an air suction port of the vacuum pump, and the second pressure sensor is used for collecting real-time pressure values of the exhaust port of the liquid storage tank.
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