CN115643736A - Immersion type cooling device and control method thereof - Google Patents
Immersion type cooling device and control method thereof Download PDFInfo
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- CN115643736A CN115643736A CN202211670275.7A CN202211670275A CN115643736A CN 115643736 A CN115643736 A CN 115643736A CN 202211670275 A CN202211670275 A CN 202211670275A CN 115643736 A CN115643736 A CN 115643736A
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- 238000007654 immersion Methods 0.000 title claims abstract description 54
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- 238000005057 refrigeration Methods 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 7
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- 238000001764 infiltration Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 6
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Abstract
The application relates to the technical field of temperature control, and discloses an immersion type cooling device and a control method of the immersion type cooling device, which comprise the following steps: acquiring working medium pressure in the cooling box through a pressure sensor; calculating saturation temperature according to working medium pressure; judging whether the saturation temperature is equal to a set management temperature or not; if not, the pressure control system or the refrigerating system is utilized to adjust the pressure of the working medium in the cooling box so as to control the saturation temperature. The pressure sensor arranged in the cooling box is used for detecting the working medium pressure, and then the pressure control system or the refrigerating system is used for adjusting the working medium pressure in the cooling box, so that the saturation temperature of the cooling box is controlled, and the thermal management failure is effectively prevented.
Description
Technical Field
The present disclosure relates to temperature control technologies, and in particular, to an immersion cooling apparatus and a control method for the immersion cooling apparatus.
Background
Immersion cooling: data center immersion cooling helps improve ITs heat dissipation design by directly immersing IT hardware in a liquid. Heat generated by the electronic components is efficiently transferred directly into the liquid, thereby reducing the need for actively cooled components such as thermally conductive interface materials, heat sinks, and fans. These improvements increase energy efficiency while allowing higher packing densities to be employed. The battery is directly immersed in the working medium in the same way.
The immersion cooling generally adopts a liquid with a lower boiling point (generally about 25-45 ℃) at normal pressure as a working medium, and the control temperature of the thermal management equipment is the boiling point of the working medium. However, under some complex conditions, the temperature of the heat management control needs to be adjusted, which cannot be met by the traditional immersion refrigeration equipment. For example, the boiling point of the working medium in the cooling tank is 25 ℃, but the working medium in the cooling tank is always 38 ℃ under certain working conditions, and at the moment, the working medium in the cooling tank is always in a vapor state, and cannot absorb heat generated by a unit to be cooled through the working medium in a liquid state, so that heat management failure is caused under certain working conditions because the immersion type refrigeration equipment cannot regulate and control the heat management temperature of the cooling tank.
Therefore, how to regulate the thermal management temperature of the immersion cooling apparatus is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide an immersion cooling device and a control method of the immersion cooling device, which are used for regulating and controlling the heat management temperature of the immersion cooling device.
In order to solve the above technical problem, the present application provides an immersion cooling apparatus, including:
the system comprises an infiltration cooling module, a cooling module and a cooling module, wherein the infiltration cooling module comprises a cooling box, and a unit to be cooled is infiltrated in a working medium in the cooling box;
a pressure sensor is arranged in the cooling box and used for detecting the pressure of a working medium in the cooling box, and the pressure of the working medium is used for determining the saturation temperature in the cooling box;
the refrigerating system is connected with the cooling box and is used for cooling the working medium in the cooling box;
and the pressure control system is connected with the cooling box through a pressure balancer, and the pressure control system and the pressure balancer are used for adjusting the working medium pressure in the cooling box so as to control the saturation temperature.
Preferably, the refrigeration system comprises:
the expansion valve is connected with the bottom end of the cooling box and is used for adjusting the pressure of the working medium in the cooling box;
the compressor is connected with the top end of the cooling box and used for compressing the working medium into high-temperature high-pressure gas and inputting the high-temperature high-pressure gas into the condenser;
and the condenser is used for condensing the high-temperature and high-pressure gas into low-temperature and high-pressure liquid, and one end of the condenser is connected with the compressor, and the other end of the condenser is connected with the expansion valve.
Preferably, the refrigeration system further comprises:
the evaporators are arranged in the cooling box and above the working medium and are used for condensing the working medium in a vapor state, and the evaporators are respectively connected with the expansion valve and the compressor.
Preferably, the pressure control system comprises: the pressure relief valve, the pressure reducing valve and the high-pressure gas tank;
one side of the pressure balancer is connected with the cooling tank, the other side of the pressure balancer is respectively connected with the pressure release valve and the pressure release valve, and the high-pressure gas tank is connected with the pressure release valve;
the pressure reducing valve is used for controlling the pressure on one side of the pressure balancer, the pressure relief valve is used for adjusting the control pressure of the pressure control system, and the pressure balancer is used for adjusting the working medium pressure of the cooling box so as to enable the working medium pressure to be equal to the control pressure.
Preferably, the pressure control system comprises: the pressure release valve, the hydraulic rod and the hydraulic pump;
one side of the pressure balancer is connected with the cooling box, the other side of the pressure balancer is respectively connected with the pressure release valve and the hydraulic rod, and the hydraulic pump is connected with the hydraulic rod;
the hydraulic pump is used for controlling the pressure in the hydraulic rod, and the pressure balancer is used for adjusting the working medium pressure of the cooling box so as to enable the working medium pressure to be equal to the pressure in the hydraulic rod.
Preferably, the pressure control system comprises: a temperature sensing bulb;
one side of the pressure balancer is connected with the cooling tank, and the other side of the pressure balancer is connected with the cooling tank;
the temperature sensing bag is filled with a temperature sensing working medium with pressure changing along with temperature, the temperature sensing bag is used for changing the pressure of the temperature sensing bag according to the sensed temperature, and the pressure balancer is used for adjusting the pressure of the working medium of the cooling box so as to enable the pressure of the working medium to be equal to the pressure in the temperature sensing bag.
The application also provides a control method of the immersion cooling device, which is applied to the immersion cooling device and comprises the following steps:
acquiring working medium pressure in the cooling box through a pressure sensor;
calculating saturation temperature according to the working medium pressure;
judging whether the saturation temperature is equal to a set management temperature or not;
if not, a pressure control system or a refrigeration system is utilized to adjust the working medium pressure in the cooling box so as to control the saturation temperature.
Preferably, if the refrigeration system includes a cooler and a pump, adjusting the pressure of the working fluid in the cooling tank using the refrigeration system includes:
if the saturation temperature is higher than the set management temperature, increasing the fan rotating speed of the cooler and/or increasing the flow of the pump;
and if the saturation temperature is lower than the set management temperature, reducing the fan rotating speed of the cooler and/or reducing the flow of the pump.
Preferably, if the refrigeration system includes a compressor, a condenser and an expansion valve, adjusting the pressure of the working medium in the cooling tank by using the refrigeration system includes:
if the saturation temperature is higher than the set management temperature, reducing the opening degree of the expansion valve;
and if the saturation temperature is lower than the set management temperature, increasing the opening degree of the expansion valve.
Preferably, the method further comprises the following steps:
obtaining the superheat degree of a working medium outlet of the cooling box;
if the superheat degree exceeds a preset value, increasing the rotating speed of the compressor;
and if the superheat degree is lower than the preset value, reducing the rotating speed of the compressor.
Preferably, if the pressure control system includes a pressure relief valve, a pressure reducing valve and a high-pressure gas tank, the pressure control system is connected to the cooling tank through a pressure balancer, and adjusting the working medium pressure in the cooling tank by using the pressure control system includes:
controlling the opening and closing time of the pressure reducing valve to control the pressure on one side of the pressure balancer;
and controlling the opening and the switching time of the pressure relief valve to reduce the control pressure of the pressure control system, so that the pressure balancer can adjust the working medium pressure in the cooling box to enable the working medium pressure to be equal to the control pressure.
Preferably, if the pressure control system includes a pressure relief valve, a hydraulic pump and a hydraulic rod, the pressure control system is connected to the cooling tank through a pressure balancer, and adjusting the working medium pressure in the cooling tank by using the pressure control system includes:
and adjusting the rotating speed and the rotating direction of the hydraulic pump to control the pressure in the hydraulic rod, so that the pressure balancer adjusts the working medium pressure of the cooling box to enable the working medium pressure to be equal to the pressure in the hydraulic rod.
The application provides a control method of an immersion cooling device, which is applied to the immersion cooling device and comprises the following steps: acquiring working medium pressure in the cooling box through a pressure sensor; calculating saturation temperature according to working medium pressure; judging whether the saturation temperature is equal to a set management temperature or not; if not, the pressure control system or the refrigerating system is utilized to adjust the pressure of the working medium in the cooling box so as to control the saturation temperature. The pressure sensor arranged in the cooling box is used for detecting the working medium pressure, and then the pressure control system or the refrigerating system is used for adjusting the working medium pressure in the cooling box, so that the saturation temperature of the cooling box is controlled, and the thermal management failure is effectively prevented.
The immersion type cooling device and the like provided by the application have the beneficial effects corresponding to the method, and the effects are as above.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic view of an immersion cooling module and a first refrigeration system provided by an embodiment of the present application;
FIG. 2 is a schematic view of an immersion cooling module and a second refrigeration system provided by an embodiment of the present application;
FIG. 3 is a schematic view of an immersion cooling module and a third refrigeration system provided by an embodiment of the present application;
FIG. 4 is a schematic view of an immersion cooling module and a fourth refrigeration system provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of a cooling tank and a first pressure control system according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a cooling tank and a second pressure control system provided in an embodiment of the present application;
FIG. 7 is a schematic diagram of a cooling tank and a third pressure control system provided in an embodiment of the present application;
fig. 8 is a schematic view illustrating a control method of an immersion cooling apparatus according to an embodiment of the present disclosure;
FIG. 9 is a schematic view of another control method for an immersion cooling apparatus according to an embodiment of the present disclosure;
FIG. 10 is a schematic view of another control method for an immersion cooling apparatus according to an embodiment of the present application;
the reference numbers are as follows: 1 is a cooling tank, 2 is a unit to be cooled, 3 is a cooler, 4 is a pump, 5 is a radiator, 6 is an expansion valve, 7 is a compressor, 8 is a condenser, 9 is an evaporator, 10 is a pressure balancer, 11 is a pressure relief valve, 12 is a pressure relief valve, 13 is a high-pressure gas tank, 14 is a hydraulic rod, 15 is a hydraulic pump, and 16 is a temperature sensing bulb.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide the immersion type cooling device and the control method of the immersion type cooling device.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
The embodiment of the application provides an immersion type cooling device, includes: the system comprises an infiltration cooling module, a cooling module and a cooling module, wherein the infiltration cooling module comprises a cooling box 1, and a unit to be cooled 2 is infiltrated into a working medium in the cooling box 1; a pressure sensor is arranged in the cooling box 1 and used for detecting the pressure of a working medium in the cooling box 1, and the pressure of the working medium is used for determining the saturation temperature in the cooling box 1; the refrigerating system is connected with the cooling box 1 and is used for cooling the working medium in the cooling box 1; and a pressure control system connected with the cooling tank 1 through a pressure balancer 10, wherein the pressure control system and the pressure balancer 10 are used for adjusting the pressure of the working medium in the cooling tank 1 so as to control the saturation temperature.
By first describing 4 the refrigeration system. Fig. 1 is a schematic view of an immersion cooling module and a first refrigeration system provided in an embodiment of the present application, as shown in fig. 1, an upper end of a cooling tank 1 is connected to a cooler 3, a lower end of the cooling tank 1 is connected to a pump 4, the cooler 3 is connected to the pump 4, and a unit to be cooled 2 is immersed in the cooling tank 1. Fig. 1 shows a direct cooling method, in which a working medium is directly fed into a cooling tank 1 by a pump 4, and in the cooling tank 1, the heat generated by the unit causes the working medium to evaporate into vapor, enter a cooler 3 under the action of a pressure difference to condense into liquid, and then return to the pump 4. Fig. 2 is a schematic diagram of an immersion cooling module and a second refrigeration system provided in an embodiment of the present application, and as shown in fig. 2, a radiator 5 is disposed inside a cooling tank 1 and above a working medium, the radiator 5 is respectively connected to a cooler 3 and a pump 4 which are disposed outside the cooling tank 1, and the cooler 3 is connected to the pump 4. Fig. 2 also adopts pump circulation, but uses an indirect connection form, a radiator 5 is arranged in the cooling tank 1, the working medium is directly contacted with the radiator 5 after being evaporated, the heat is taken away by the radiator 5, and the circulation of the pump 4 is external circulation, and the heat is taken away from the cooling tank 1 through the same or different working medium in the cooling tank 1. Fig. 3 is a schematic diagram of an immersion cooling module and a third refrigeration system according to an embodiment of the present disclosure, and as shown in fig. 3, an upper end of a cooling box 1 is connected to a compressor 7, a lower end of the cooling box 1 is connected to an expansion valve 6, and the compressor 7 is connected to the expansion valve 6 through a condenser 8. The compressor 7 in fig. 3 compresses a working medium into high-pressure high-temperature gas, the high-pressure high-temperature gas enters the condenser 8 and is condensed into high-pressure low-temperature liquid, then the evaporation pressure is changed through the expansion valve 6, the cooling box 1 serves as the evaporator 9 to evaporate the working medium, and the working medium takes away heat generated by the unit to be cooled 2 in the evaporation process. Fig. 4 is a schematic diagram of an immersion cooling module and a fourth refrigeration system according to an embodiment of the present disclosure, and as shown in fig. 4, an evaporator 9 is disposed above a working medium in a cooling box 1, the evaporator 9 is connected to a compressor 7 and an expansion valve 6, respectively, and the compressor 7 and the expansion valve 6 are connected through a condenser 8. In the figure 4, a direct evaporation refrigeration and immersion refrigeration indirect contact method is adopted, and the working medium in the cooling box 1 evaporates and takes away the unit to generate heat and then contacts with the structure of the evaporator 9 in the box to be condensed into liquid. Meanwhile, the external refrigeration cycle takes away heat produced by the working medium. In the four designs, the cooler and the condenser can be independently arranged and can be heat exchangers exchanging heat with air or heat exchangers exchanging heat with other cooling circulation.
The pressure control system is connected with the cooling box through the pressure balancer, the pressure control system directly controls working medium pressure of the cooling box, the control principle is simple, control is accurate, and reaction is rapid. Next, 3 control systems are introduced, fig. 5 is a schematic diagram of a cooling tank and a first pressure control system provided in an embodiment of the present application, and as shown in fig. 5, the first pressure control system includes a pressure relief valve 11, a pressure reducing valve 12, and a high-pressure gas tank 13, one side of a pressure balancer 10 is connected to the cooling tank 1, the other side of the pressure balancer 10 is connected to the pressure relief valve 11 and the pressure reducing valve 12, and the high-pressure gas tank 13 is connected to the pressure reducing valve 12. The pressure reducing valve 12 is used for controlling the pressure on one side of the pressure balancer 10, the pressure relief valve 11 is used for adjusting the control pressure of the pressure control system, and the pressure balancer 10 is used for adjusting the working medium pressure of the cooling tank 1 so that the working medium pressure is equal to the control pressure. Fig. 6 is a schematic diagram of a cooling tank and a second pressure control system provided in an embodiment of the present application, and as shown in fig. 6, the second pressure control system includes a pressure relief valve 11, a hydraulic rod 14, and a hydraulic pump 15, one side of a pressure balancer 10 is connected to the cooling tank 1, the other side of the pressure balancer 10 is connected to the pressure relief valve 11 and the hydraulic rod 14, and the hydraulic pump 15 is connected to the hydraulic rod 14. The hydraulic pump 15 is used to control the pressure in the hydraulic rod 14 and the pressure balancer 10 is used to regulate the working medium pressure of the cooling tank 1 so that the working medium pressure is equal to the pressure in the hydraulic rod. Fig. 7 is a schematic diagram of a cooling tank and a third pressure control system according to an embodiment of the present application, where the third pressure control system includes a thermal bulb 16, one side of a pressure balancer 10 is connected to the cooling tank 1, and the other side of the pressure balancer 10 is connected to the cooling tank 1. The temperature sensing bulb 16 is filled with a temperature sensing working medium with pressure changing along with temperature, the temperature sensing bulb 16 is used for changing the pressure of the temperature sensing bulb according to the sensed temperature, and the pressure balancer 10 is used for adjusting the pressure of the working medium of the cooling box so as to enable the pressure of the working medium to be equal to the pressure in the temperature sensing bulb.
With respect to the selection of working fluids, in immersion refrigeration solutions, fluids having a low dielectric constant, with evaporation temperatures around 25-45 ℃ at atmospheric pressure (atmospheric pressure), are typically selected. Furthermore, the working medium used should satisfy the following conditions: the pressure is not negative under most working conditions, which is to ensure that air is not sucked into the module; the evaporation temperature (boiling point) should be slightly lower than the control temperature in order to ensure the effectiveness of heat management; under the thermal management temperature of the extreme high-temperature working condition, the saturation pressure of the working medium should ensure the unit to operate safely, for example, the extreme high-temperature working condition is 60 ℃, and the safety pressure of the unit to be cooled is 6bar, so that the saturation pressure of the working medium under the working condition should be obviously lower than 6bar, which is to ensure the operation safety of the system.
The embodiment of the application provides a formula cooling device soaks includes: the infiltration cooling module comprises a cooling box, and the unit to be cooled is infiltrated in the working medium in the cooling box; a pressure sensor is arranged in the cooling box and used for detecting the pressure of a working medium in the cooling box, and the pressure of the working medium is used for determining the saturation temperature in the cooling box; the refrigerating system is connected with the cooling box and is used for cooling the working medium in the cooling box; and the pressure control system is connected with the cooling tank through the pressure balancer, and the pressure control system and the pressure balancer are used for adjusting the pressure of the working medium in the cooling tank so as to control the saturation temperature. The pressure sensor is arranged in the cooling box to detect the pressure of the working medium, and the pressure control system is used for adjusting the pressure of the working medium to control the saturation temperature of the cooling box, so that the thermal management failure is effectively prevented.
Based on the above embodiments, the embodiments of the present application mainly describe a specific method for adjusting the pressure of the cooling tank. Fig. 8 is a schematic view of a control method of an immersion cooling apparatus according to an embodiment of the present application, which is applied to the immersion cooling apparatus and includes:
s10: and acquiring the working medium pressure in the cooling box through a pressure sensor.
S11: and calculating the saturation temperature according to the working medium pressure.
S12: judging whether the saturation temperature is equal to a set management temperature or not; if not, go to step S13.
S13: and regulating the pressure of the working medium in the cooling box by using a pressure control system or a refrigerating system to control the saturation temperature.
The control method for the immersion cooling device provided by the embodiment of the application is applied to the immersion cooling device and comprises the following steps: acquiring working medium pressure in the cooling box through a pressure sensor; calculating saturation temperature according to working medium pressure; judging whether the saturation temperature is equal to a set management temperature or not; if not, the pressure control system or the refrigerating system is utilized to adjust the pressure of the working medium in the cooling box so as to control the saturation temperature. The pressure sensor arranged in the cooling box is used for detecting the working medium pressure, and then the pressure control system or the refrigerating system is used for adjusting the working medium pressure in the cooling box, so that the saturation temperature of the cooling box is controlled, and the thermal management failure is effectively prevented.
The first method comprises the following steps: and (4) controlling the heat balance.
A pressure sensor is additionally arranged in the cooling box, the saturated temperature of the working medium is converted by measuring the pressure of the working medium in the cooling box, and the saturated temperature of the working medium is compared with a thermal management target temperature (set management temperature).
Fig. 9 is a schematic view of another control method of an immersion cooling apparatus according to an embodiment of the present application, and as shown in fig. 9, with reference to fig. 1 and 2, if a refrigeration system includes a cooler and a pump, adjusting a pressure of a working medium in a cooling tank by using the refrigeration system includes:
s20: and acquiring the working medium pressure in the cooling box through a pressure sensor.
S21: and calculating the saturation temperature according to the working medium pressure.
S22: judging whether the saturation temperature is equal to a set management temperature or not; if not, executing S23; if yes, the process is finished.
S23: judging whether the saturation temperature is greater than a set management temperature; if yes, go to S24, otherwise go to S25.
S24: increasing the fan speed of the chiller and/or increasing the flow rate of the pump.
S25: reducing the fan speed of the chiller and/or reducing the flow rate of the pump.
Considering that the system cooler may be a heat exchanger connected to other cycles, the amount of heat exchange of other cycles is increased when the temperature is higher than the management temperature; when the temperature is lower than the control temperature, the heat exchange amount of the other circulation is reduced. The fan speed and pump flow adjustments in the above control scheme may be in an either or both relationship. The specific adjustment scheme should be determined according to the system calibration result. The system calibration result generally satisfies which control strategy is most energy-saving, and which is adopted. For example, under the control strategy of increasing the rotation speeds of the fan and the pump, it needs to be considered how much the rotation speed of the fan is increased and how much the flow rate of the circulating pump is increased in order to achieve the same heat exchange amount, and the increase of the power consumption of the fan and the pump is minimum.
And the second method comprises the following steps: and (4) directly controlling.
Fig. 10 is a schematic view of another method for controlling an immersion cooling apparatus according to an embodiment of the present application, where, as shown in fig. 10, if the refrigeration system includes a compressor, a condenser, and an expansion valve, adjusting the pressure of the working medium in the cooling tank by using the refrigeration system includes:
s30: and acquiring the working medium pressure in the cooling box through a pressure sensor.
S31: and calculating the saturation temperature according to the working medium pressure.
S32: judging whether the saturation temperature is equal to a set management temperature or not; if not, executing S33; if yes, the process is finished.
S33: judging whether the saturation temperature is greater than a set management temperature; if so, go to step S34, otherwise, go to step S35.
S34: reducing the opening degree of the expansion valve.
S35: increasing the opening degree of the expansion valve.
A pressure sensor is additionally arranged in the cooling box and used for monitoring the saturation pressure of the working medium in the cooling box and calculating the saturation temperature, so that the purpose of controlling the heat management temperature is achieved. The system can control the evaporation pressure of the cooling box (namely an evaporator of the refrigeration system) by controlling the opening degree of the expansion valve, thereby controlling the thermal management temperature of the cooling box. At the moment, the purpose of controlling the heat balance of the system can be achieved by controlling the rotating speed of the compressor, and the refrigerating capacity of the refrigerating system is adjusted by adjusting the rotating speed of the compressor. Furthermore, the system can be coupled with other air conditioning systems, such as adding an evaporator as an air conditioning device for adjusting the temperature and humidity of a room where a person is located, or adjusting the temperature of a passenger compartment of a vehicle. The system control principle is similar to that of a common refrigeration air-conditioning system and a multi-split refrigeration air-conditioning system. In addition, the control needs to be carried out aiming at the heat balance, the superheat degree is measured at a working medium outlet of a cooling box (an evaporator), if the superheat degree is too high, the rotating speed of the compressor is increased, and if the superheat degree is too low, the rotating speed is reduced. In the multi-split scheme, if the superheat degree is too high, the flow of the system is increased (the rotating speed of a compressor is increased, the opening degree of an expansion valve of the loop is increased, and the opening degrees of expansion valves of other loops are reduced); otherwise, if the superheat degree is too low, the system flow is reduced (the rotation speed of the compressor is reduced, the opening degree of the expansion valve of the loop is reduced, and the opening degrees of the expansion valves of other loops are increased). The advantage of direct control is that the system is relatively simple and can be coupled to other refrigeration air conditioning systems.
Third, a control method of the pressure control system is utilized.
The pressure control system is connected with the cooling tank through a pressure balancer. The scheme has the advantages of direct pressure control, simple control principle, accurate control and quick response. The immersion cooling device can be connected with a refrigerating system and a pressure control system at the same time.
There are 3 control methods using a pressure control system:
1. a gas control scheme.
As shown in fig. 5, if the pressure control system includes a pressure relief valve, a pressure reducing valve and a high-pressure gas tank, the pressure control system is connected to the cooling tank through a pressure balancer, and the adjusting of the working medium pressure in the cooling tank by the pressure control system includes: controlling the opening and closing time of the pressure reducing valve to control the pressure on one side of the pressure balancer; and controlling the opening degree and the opening and closing time of the pressure relief valve to reduce the control pressure of the pressure control system, so that the pressure balancer adjusts the working medium pressure in the cooling tank to enable the working medium pressure to be equal to the control pressure.
As shown in fig. 5, one side of the pressure balancer is fitted to the left side of the cooling tank, and the left side pressure of the pressure balancer is controlled by controlling the opening degree and the opening/closing time of the pressure reducing valve. And the pressure of the pressure control system can be reduced through the opening degree and the opening and closing time of the pressure release valve. The left and right side pressures of the pressure balancer are kept balanced, so that the pressure in the cooling box is ensured to be equal to the control pressure of the pressure control system, and the purpose of controlling the pressure is achieved. The scheme has the advantages of higher construction cost and lower operation cost, and is suitable for large-scale systems.
2. And (4) a hydraulic control scheme.
As shown in fig. 6, the pressure control system includes a pressure relief valve, a hydraulic pump and a hydraulic rod, the pressure control system is connected with the cooling tank through a pressure balancer, and the adjusting of the working medium pressure in the cooling tank by the pressure control system includes: the rotation speed and the rotation direction of the hydraulic pump are adjusted to control the pressure in the hydraulic rod, so that the pressure balancer adjusts the working medium pressure of the cooling tank to make the working medium pressure equal to the pressure in the hydraulic rod.
As shown in fig. 6, one side of the pressure balancer is inserted into the left side of the cooling tank, and the pressure in the hydraulic rod is controlled by adjusting the rotation speed and the rotation direction of the hydraulic pump, and the saturation pressure of the cooling tank is controlled by the pressure balancer. The pressure relief valve ensures the operation safety of the system. This solution is suitable for systems requiring highly precise control of pressure and thermal management temperature.
3. And a temperature sensing bulb control scheme.
In the control scheme of the temperature sensing bag, working media with pressure changing along with temperature are filled in the temperature sensing bag. This working fluid may be the same as or different from the working fluid in the cooling tank. However, the pressure-temperature change curve of the working medium in the temperature sensing bulb should meet the control requirement. The temperature of a certain part of the system is sensed through the temperature sensing bulb, so that the aim of automatically controlling the saturation pressure of the cooling box is fulfilled. This design is generally directed to situations where thermal management temperature needs to be changed in relation to changes in ambient temperature. The temperature sensing bag is exposed in the environment, when the environment temperature rises, the temperature in the high-temperature bag rises, the pressure rises, the saturation pressure in the cooling box rises by matching with the pressure balancer, and the heat management temperature rises; otherwise, the ambient temperature is reduced, the pressure in the temperature sensing bulb is reduced, and the heat management temperature in the cooling box is reduced in cooperation with the pressure in the temperature sensing bulb. But the temperature sensing bulb can also be connected with other components positively correlated with the thermal management temperature to achieve the aim of automatic control. The advantage of this solution is that there are no moving parts and the cost is reduced considerably.
In addition to the above-mentioned three methods of direct control, thermal balance control and control method using pressure control system, it can also adopt non-azeotropic working medium control scheme, when designing, the upper limit T2 and lower limit T1 of thermal management temperature control are arranged, and the working medium whose pure gas is T2, pure liquid is T1 and temperature is (T2-T1) is mixed by mixed working medium, so as to achieve the purpose of automatic control of thermal management temperature. The scheme has the advantages of simple system, simple control system and low cost.
The immersion cooling apparatus and the control method of the immersion cooling apparatus provided in the present application are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Claims (12)
1. An immersion cooling apparatus, comprising:
the system comprises an infiltration cooling module, a cooling module and a control module, wherein the infiltration cooling module comprises a cooling box, and a unit to be cooled is infiltrated in a working medium in the cooling box;
a pressure sensor is arranged in the cooling box and used for detecting the pressure of a working medium in the cooling box, and the pressure of the working medium is used for determining the saturation temperature in the cooling box;
the refrigerating system is connected with the cooling box and is used for cooling the working medium in the cooling box;
and the pressure control system is connected with the cooling box through a pressure balancer, and the pressure control system and the pressure balancer are used for adjusting the working medium pressure in the cooling box so as to control the saturation temperature.
2. An immersion cooling apparatus as claimed in claim 1, wherein the refrigeration system comprises:
the expansion valve is connected with the bottom end of the cooling box and is used for adjusting the pressure of the working medium in the cooling box;
the compressor is connected with the top end of the cooling box and used for compressing the working medium into high-temperature high-pressure gas and inputting the high-temperature high-pressure gas into the condenser;
and the condenser is used for condensing the high-temperature and high-pressure gas into low-temperature and high-pressure liquid, and one end of the condenser is connected with the compressor, and the other end of the condenser is connected with the expansion valve.
3. The immersion cooling apparatus as claimed in claim 2, wherein the refrigeration system further comprises:
the evaporators are arranged in the cooling box and above the working medium and are used for condensing the working medium in a vapor state, and the evaporators are respectively connected with the expansion valve and the compressor.
4. The immersion cooling apparatus of claim 1, wherein the pressure control system comprises: the pressure relief valve, the pressure reducing valve and the high-pressure gas tank;
one side of the pressure balancer is connected with the cooling tank, the other side of the pressure balancer is respectively connected with the pressure relief valve and the pressure relief valve, and the high-pressure gas tank is connected with the pressure relief valve;
the pressure reducing valve is used for controlling the pressure on one side of the pressure balancer, the pressure relief valve is used for adjusting the control pressure of the pressure control system, and the pressure balancer is used for adjusting the working medium pressure of the cooling box so as to enable the working medium pressure to be equal to the control pressure.
5. The immersion cooling apparatus of claim 1, wherein the pressure control system comprises: the pressure release valve, the hydraulic rod and the hydraulic pump;
one side of the pressure balancer is connected with the cooling box, the other side of the pressure balancer is respectively connected with the pressure release valve and the hydraulic rod, and the hydraulic pump is connected with the hydraulic rod;
the hydraulic pump is used for controlling the pressure in the hydraulic rod, and the pressure balancer is used for adjusting the working medium pressure of the cooling box so as to enable the working medium pressure to be equal to the pressure in the hydraulic rod.
6. The immersion cooling apparatus of claim 1, wherein the pressure control system comprises: a temperature sensing bulb;
one side of the pressure balancer is connected with the cooling tank, and the other side of the pressure balancer is connected with the cooling tank;
the temperature sensing bag is filled with a temperature sensing working medium with pressure changing along with temperature, the temperature sensing bag is used for changing the pressure of the temperature sensing bag according to the sensed temperature, and the pressure balancer is used for adjusting the pressure of the working medium of the cooling box so as to enable the pressure of the working medium to be equal to the pressure in the temperature sensing bag.
7. An immersion cooling apparatus control method applied to the immersion cooling apparatus according to any one of claims 1 to 6, comprising:
acquiring the pressure of a working medium in the cooling box through a pressure sensor;
calculating saturation temperature according to the working medium pressure;
judging whether the saturation temperature is equal to a set management temperature or not;
if not, a pressure control system or a refrigeration system is utilized to adjust the working medium pressure in the cooling box so as to control the saturation temperature.
8. The control method of claim 7, wherein adjusting the pressure of the working fluid in the cooling tank using the refrigeration system comprises, if the refrigeration system comprises a chiller and a pump:
if the saturation temperature is higher than the set management temperature, increasing the fan rotating speed of the cooler and/or increasing the flow of the pump;
and if the saturation temperature is lower than the set management temperature, reducing the fan rotating speed of the cooler and/or reducing the flow of the pump.
9. The method of claim 7, wherein if a refrigeration system includes a compressor, a condenser, and an expansion valve, adjusting the pressure of the working fluid in the cooling tank with the refrigeration system comprises:
if the saturation temperature is higher than the set management temperature, reducing the opening degree of the expansion valve;
and if the saturation temperature is lower than the set management temperature, increasing the opening degree of the expansion valve.
10. The control method according to claim 9, characterized by further comprising:
obtaining the superheat degree of a working medium outlet of the cooling box;
if the superheat degree exceeds a preset value, increasing the rotating speed of the compressor;
and if the superheat degree is lower than the preset value, reducing the rotating speed of the compressor.
11. The control method of claim 7, wherein if the pressure control system includes a pressure relief valve, a pressure reducing valve, and a high pressure gas tank, the pressure control system is connected to the cooling tank through a pressure balancer, and adjusting the pressure of the working medium in the cooling tank using the pressure control system includes:
controlling the opening and closing time of the pressure reducing valve to control the pressure on one side of the pressure balancer;
and controlling the opening and the switching time of the pressure relief valve to reduce the control pressure of the pressure control system, so that the pressure balancer can adjust the working medium pressure in the cooling box to enable the working medium pressure to be equal to the control pressure.
12. The method of claim 7, wherein if the pressure control system includes a pressure relief valve, a hydraulic pump, and a hydraulic lever, the pressure control system is connected to the cooling tank through a pressure balancer, and adjusting the pressure of the working medium in the cooling tank using the pressure control system includes:
and adjusting the rotating speed and the rotating direction of the hydraulic pump to control the pressure in the hydraulic rod, so that the pressure balancer adjusts the working medium pressure of the cooling box to enable the working medium pressure to be equal to the pressure in the hydraulic rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211670275.7A CN115643736A (en) | 2022-12-26 | 2022-12-26 | Immersion type cooling device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211670275.7A CN115643736A (en) | 2022-12-26 | 2022-12-26 | Immersion type cooling device and control method thereof |
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Application publication date: 20230124 |