CN208540355U - Active phase change cooling system - Google Patents
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- CN208540355U CN208540355U CN201820986928.5U CN201820986928U CN208540355U CN 208540355 U CN208540355 U CN 208540355U CN 201820986928 U CN201820986928 U CN 201820986928U CN 208540355 U CN208540355 U CN 208540355U
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- 238000001816 cooling Methods 0.000 title claims abstract description 81
- 230000008859 change Effects 0.000 title claims description 28
- 239000007788 liquid Substances 0.000 claims abstract description 95
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000009835 boiling Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical group O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses an active phase-change cooling system, which comprises a heating component, a fluid working medium, an upper branch pipe, a gas collecting pipe, an upper main pipe, an outer cooling system, a gas-liquid separator, a gaseous working medium return pipe, a liquid storage tank, a lower main pipe, a circulating pump, a liquid collecting pipe and a lower branch pipe; wherein, the upper portion export of heating element passes through last bleeder and discharge entry intercommunication, and the discharge export passes through go up the person in charge and communicate in proper order with outer cooling system, vapour and liquid separator pass through gaseous state working medium back flow and outer cooling system intercommunication, simultaneously through last person in charge and liquid storage pot entry intercommunication, the liquid storage pot export is responsible for in proper order and circulating pump and collecting pipe intercommunication through being responsible for down, the collecting pipe is through bleeder and heating element's lower part entry intercommunication down, entire system is inclosed circulation circuit, inside notes fluid working medium that fills. The utility model discloses an active phase transition cooling system insulating nature is good, heat exchange efficiency is high, the energy saving to make heat source surface temperature distribution more even.
Description
Technical Field
The utility model relates to a cooling system especially relates to an active phase transition cooling system.
Background
In the fields of power grids, rail transit and the like, high-power electronic devices have the characteristics of importance, complexity, vulnerability and the like. Experimental studies show that when the surface temperature of the devices exceeds 80 ℃, the reliability is reduced by 5% when the surface temperature of the devices is increased by 1 ℃, so that the surface temperature of the power electronic devices needs to be strictly controlled to stably realize functions of rectification, inversion and the like for a long time, and the damage of the devices caused by local high temperature is avoided.
At present, the main cooling mode of the high-power device is water-water dual circulation cooling, and the following problems exist: the inner circulation pipeline is soaked in water for a long time and reacts with the water through ionization and the like, so that the insulativity is poor; meanwhile, the pipeline may be blocked by scaling, so that a deionization device, a filtering device and the like need to be added in the system, and the system is complex and has high operation and maintenance difficulty; in addition, because the heat dissipation efficiency of water is close to the limit, the heat dissipation efficiency is not really enhanced by increasing the flow velocity, and the pressure bearing capacity of the system is limited.
Disclosure of Invention
To the shortcoming of above-mentioned prior art, the utility model aims at providing an active phase transition cooling system suitable for high-power electronic device makes this system insulating nature good, heat exchange efficiency is high, the energy saving to make heat source surface temperature distribution more even.
In order to achieve the purpose, the utility model provides an active phase change cooling system, which comprises a heating component, a fluid working medium, an upper branch pipe, a gas collecting pipe, an upper main pipe, an outer cooling system, a gas-liquid separator, a gaseous working medium return pipe, a liquid storage tank, a lower main pipe, a circulating pump, a liquid collecting pipe and a lower branch pipe; wherein,
the upper outlet of the heating component is communicated with the gas collecting pipe inlet through the upper branch pipe, the gas collecting pipe outlet is communicated with the outer cooling system and the gas-liquid separator in sequence through the upper main pipe, the gas-liquid separator is communicated with the outer cooling system and the gas-liquid separator through the gas working medium return pipe, the gas-liquid separator is communicated with the liquid storage tank inlet through the upper main pipe, the liquid storage tank outlet is communicated with the circulating pump and the liquid collecting pipe in sequence through the lower main pipe, the liquid collecting pipe is communicated with the lower inlet of the heating component through the lower branch pipe, the whole system forms a closed circulating loop, and fluid working media are filled inside the closed circulating loop.
Preferably, the heating assembly comprises a heating element and a radiator, and the heating element and the radiator adopt a valve group structure connected in parallel or alternately in series.
Preferably, the system comprises a PLC controller, the inlet and the outlet of the radiator are both provided with a pressure sensor and a thermal resistor, the central position of the surface of the radiator is provided with a thermocouple, and the pressure sensor, the thermal resistor and the thermocouple are all connected with the PLC controller.
Preferably, a sight glass is installed at the outlet of the gas collecting pipe.
Preferably, the upper part of the liquid storage tank is provided with a vacuum tube and a liquid level meter, and the liquid level meter is connected with the PLC.
Preferably, the circulating pump is arranged below the liquid storage tank, a flow meter is arranged between the circulating pump and the liquid collecting pipe, and the circulating pump and the flow meter are connected with the PLC.
Preferably, the diameter of the upper main pipe is larger than that of the upper main pipe, and the diameter of the lower main pipe is larger than that of the lower main pipe.
Preferably, the external cooling system is a fan or a water circulation cooling device.
Preferably, the volume of the liquid storage tank is at least 3 times of the volume of the fluid working medium required by the heat generating component.
Implement the embodiment of the utility model provides a, following beneficial effect has: the active phase-change cooling system has the advantages that the fluid working medium is a high-insulation low-boiling-point compound, heat is absorbed by utilizing conversion between liquid and gas phases when the working medium is boiled, the insulation property is good, the heat exchange efficiency is high, and meanwhile, the surface temperature distribution of a cooled device is more uniform and the reliability is better; before the cooling system operates, the system is pumped into a vacuum state through a vacuum tube and then is injected with a proper amount of fluid working medium, the internal operating pressure is lower than the external atmospheric pressure, on one hand, the influence of residual air in the system on the boiling of the working medium is avoided, on the other hand, the leakage of the working medium can be prevented, and the safety is good; the circulating pump can flexibly adjust the heat dissipation efficiency by adjusting the flow speed of the working medium, saves energy, has wide application range and meets different temperature cooling requirements of users; the cooling system can be established on the basis of an old water cooling system, and only the internal circulation cooling mode needs to be replaced by a phase change cooling mode, so that the external cooling part is kept unchanged, and the cost is saved. Meanwhile, the PLC control center monitors the temperature, pressure, flow and liquid level of the system and carries out timely regulation and control according to actual conditions.
Drawings
Fig. 1 is a schematic structural diagram of an active phase change cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the heat sink shown in FIG. 1;
fig. 3 is a schematic diagram of an active phase change cooling system according to an embodiment of the present invention.
Wherein: 1. the heat pump comprises a heating element, 2, a radiator, 3, an upper branch pipe, 4, a gas collecting pipe, 5, a viewing mirror, 6, an upper main pipe, 7, a gaseous working medium return pipe, 8, an external cooling system, 9, a gas-liquid separator, 10, a vacuum pipe, 11, a liquid storage tank, 12, a liquid level meter, 13, a lower main pipe, 14, a circulating pump, 15, a flow meter, 16, a liquid collecting pipe, 17, a lower branch pipe, 18, a first thermal resistor, 19, a first pressure sensor, 20, a first thermocouple, 21, a second pressure sensor and 22, a second thermal resistor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides an active phase change cooling system, which comprises a heating component, a fluid working medium, an upper branch pipe 3, a gas collecting pipe 4, an upper main pipe 6, an external cooling system 8, a gas-liquid separator 9, a gaseous working medium return pipe 7, a liquid storage tank 11, a lower branch pipe 13, a circulating pump 14, a liquid collecting pipe 16 and a lower branch pipe 17; wherein,
the upper outlet of the heating component is communicated with the inlet of the gas collecting pipe 4 through the upper branch pipe 3, the outlet of the gas collecting pipe 4 is communicated with the outer cooling system 8 and the gas-liquid separator 9 in sequence through the upper main pipe 6, the gas-liquid separator 9 is communicated with the outer cooling system 8 through the gaseous working medium return pipe 7, meanwhile, the gas-liquid separator 9 is communicated with the inlet of the liquid storage tank 11 through the upper main pipe 6, the outlet of the liquid storage tank 11 is communicated with the circulating pump 14 and the liquid collecting pipe 16 in sequence through the lower branch pipe 13, the liquid collecting pipe 16 is communicated with the lower inlet of the heating component through the lower branch pipe 17, and the whole system forms a closed circulating loop with internally filled fluid working medium.
The fluid working medium is a compound with high insulation and low boiling point, and the fluid working medium with the saturation temperature close to that of the fluid working medium can be selected according to the specific cooling temperature requirement in practical application.
The active phase-change cooling system is filled with liquid fluid working media, and after the fluid working media in the heating assembly absorb heat, part of the working media are subjected to phase change and are vaporized; the vaporized working medium is cooled by the external cooling system 8 to release heat and is converted into liquid, wherein the gas working medium which is not converted into liquid is cooled again from the external cooling system 8 through the gas working medium return pipe 7, and the liquefied working medium is sent to the liquid storage tank 11 through the upper main pipe 6; the circulation pump 14 circulates the liquid working medium in the liquid storage tank 11 to the heat generating component in a proper amount according to the requirement of the cooling system. The gas-liquid separator 9 ensures that all the working medium entering the liquid storage tank 11 is in a liquid state; the liquid storage tank 11 is used for storing and buffering liquid working media in the system, so that enough liquid working media are always in the system, the working media in the heating assembly are prevented from being evaporated to dryness, the whole cooling system is prevented from being collapsed, and meanwhile, the circulating pump 14 can be prevented from being in an idle bad state; the active phase change cooling system can realize high-efficiency heat dissipation under the condition of safe operation.
In an alternative embodiment, the heat generating assembly includes a heat generating component 1 and a heat sink 2, and the heat generating component 1 and the heat sink 2 adopt a parallel or alternate series connection valve set structure. The heating element 1 can be a power semiconductor device such as a thyristor or an IGBT; the radiator 2 can adopt a pipeline structure similar to the traditional water-cooling radiator 2, such as a straight-through type structure; the assembly form in which the heating element 1 and the heat sink 2 are alternately connected in series includes a press-contact type IGBT device, and the assembly form in parallel includes a solder type IGBT device.
In an alternative embodiment, the system comprises a PLC controller, the inlet and the outlet of the radiator 2 are both provided with a pressure sensor and a thermal resistor, the surface center of the radiator 2 is provided with a thermocouple, and the pressure sensor, the thermal resistor and the thermocouple are all connected with the PLC controller. As shown in FIG. 2, the thermal resistor and the pressure sensor are installed at the interfaces of the upper branch pipe 3 and the lower branch pipe 17 near the inlet and the outlet of the radiator 2, and the temperature and the pressure at the inlet and the outlet of the radiator 2 are tested. The actual saturation temperature of the fluid working medium at the inlet and outlet of the radiator 2 can be calculated according to the known change relation curve of the saturation temperature of the fluid working medium along with the pressure and the actually measured inlet and outlet pressures. The temperature measured by the thermal resistance at the inlet and outlet of the radiator 2 and the temperature calculated by the pressure can be verified mutually, and meanwhile, if the temperature measured by the thermal resistance at the outlet of the radiator 2 and the temperature calculated by the pressure have a certain difference, whether the liquid working medium in the radiator 2 is enough or exceeds the actual requirement needs to be considered, and whether the rotating speed of the circulating pump 14 needs to be adjusted. The thermocouple is arranged in a micro groove etched in the center of the surface of the radiator 2, the temperature of the contact surface of the radiator 2 and the heating element 1 is tested, and the heat dissipation effect of the phase change cooling mode is tested.
In an alternative embodiment, the outlet of the gas collecting pipe 4 is provided with a viewing mirror 5. As shown in fig. 1, the gas collecting pipe 4 collects and gathers the vaporized working medium in each radiator 2, and plays an important role of bearing between the upper branch pipe 3 and the upper main pipe 6; the sight glass 5 is arranged at the outlet of the gas collecting pipe 4 and monitors the gas-liquid mixing state of the fluid working medium at the outlet of the gas collecting pipe 4. The phase change degree of the fluid working medium in the radiator 2 is estimated by observing the proportion of the gaseous working medium at the outlet of the gas collecting pipe 4, so that the bad condition that the liquid working medium in the radiator 2 is evaporated to dryness is avoided.
In an alternative embodiment, the vacuum pipe 10 and the liquid level meter 12 are installed on the upper part of the liquid storage tank 11, and the liquid level meter 12 is connected with the PLC controller. As shown in fig. 1, the liquid level meter 12 is installed in the reservoir tank 11, and monitors the volume of the liquid working medium in the reservoir tank 11 to prevent the circulation pump 14 from idling due to no liquid working medium in the reservoir tank 11.
In an alternative embodiment, the circulating pump 14 is arranged below the liquid storage tank 11, a flow meter 15 is arranged between the circulating pump 14 and the liquid collecting pipe 16, and the circulating pump 14 and the flow meter 15 are connected with the PLC. As shown in fig. 1, a flow meter 15 is installed on the downcomer 13 between the circulation pump 14 and the header 16, and monitors the flow rate of the liquid working medium circulated to the header 16 by the circulation pump 14.
In an alternative embodiment, the diameter D of the upper main pipe 6 is greater than the diameter D of the upper branch pipe, and the diameter D of the lower main pipe 13 is greater than the diameter D of the lower branch pipe. Specific need to satisfy relational expressionWherein n is the number of branches.
In an alternative embodiment, the external cooling system 8 is a fan or water circulation cooling device. Due to energy conservation, the power of the external cooling system 8, whether it is a fan or a water circulation cooling device, is at least larger than the sum of the powers of the heating elements 1.
In an alternative embodiment, the volume of reservoir 11 is at least 3 times the volume of fluid medium required by the heat generating component. According to the law of conservation of energy, the total heat productivity of the heating element 1 in unit time is firstly calculated according to the power of a device to be cooled, and then the volume V of the required cooling working medium is calculated according to the total heat productivity. Because the liquid storage tank 11 needs to provide sufficient liquid working medium for the whole system, on one hand, the circulating pump 14 is prevented from idling due to the fact that no liquid working medium exists in the liquid storage tank 11, and meanwhile, the liquid working medium in the radiator 2 is prevented from being completely boiled and vaporized and cannot be supplemented in time; considering that the external cooling system 8 has certain cooling time delay, the volume of the liquid storage tank 11 is at least 3V;
as shown in fig. 3, the first thermocouple 20 to the nth thermocouple, the first thermal resistor 18, the second thermal resistor 22 to the nth thermal resistor, the first pressure sensor 19, the second pressure sensor 21 to the nth pressure sensor, the liquid level meter 12 and the flow meter 15 of the radiator 2 upload test data to the PLC control center. In the laboratory test stage of the cooling system, a relation curve of the pressure of the outlet of the radiator 2 and the proportion of the gaseous working medium in the fluid working medium is fitted and input to a PLC control center as a calibration curve, and the degree of phase change of the fluid working medium in the radiator 2 can be monitored in real time by monitoring the pressure change of the outlet. When the proportion of the gaseous working medium reaches the set upper limit, the PLC control center can automatically adjust the rotating speed of the circulating pump 14 to adjust the flow of the liquid working medium circulating to the radiator 2, thereby realizing the control of the phase change process.
The following describes the working process of an active phase change cooling system according to an embodiment of the present invention in detail.
S1, before a cooling system runs, firstly, the whole system is vacuumized into a vacuum state through a vacuum tube 10, then, the system is kept still for one day, and then, the change of the internal pressure of the system is observed through any pressure sensor in the system.
If the variation of the internal pressure is not more than 0.01MPa, the sealing performance of the whole system is good. The vacuumized system avoids the influence of residual air in the system on the boiling of the working medium on one hand, and can prevent the leakage of the working medium due to the fact that the internal pressure is lower than the atmospheric pressure of the external environment on the other hand.
And S2, after the system is determined to have good sealing performance, injecting a proper amount of fluid working medium into the system.
And S3, after the cooling system is started, the power heating element 1 is conducted.
After being electrified, the heating element 1 generates heat due to self power consumption, the heat is transferred to the adjacent radiator 2 in a heat conduction mode, and the radiator 2 transfers the heat to the fluid working medium. The fluid working medium absorbs heat and reaches a boiling point, then phase change occurs, the fluid working medium is converted from a liquid state to a gas state, and under the action of buoyancy, the gas working medium in each radiator 2 is collected to the gas collecting pipe 4 through the upper branch pipe 3 and then enters the external cooling system 8 for cooling and liquefaction. The fluid working medium cooled by the external cooling system 8 may have part of gas working medium not converted into liquid, the gas-liquid separator 9 separates the gas working medium which is not completely liquefied, and the gas working medium passes through the gas working medium return pipe 7 and circulates back to the external cooling system 8 again for cooling and liquefaction, so that the fluid working medium flowing into the liquid storage tank 11 is ensured to be all liquid. The circulating pump 14 circulates the liquid working medium in the liquid storage tank 11 to the radiator 2 again according to the specific condition of the fluid working medium in the radiator 2, so that enough liquid working medium in the radiator 2 is ensured not to be evaporated to dryness, and the circulating heat dissipation is realized.
Implement the embodiment of the utility model provides a, following beneficial effect has: the active phase-change cooling system has the advantages that the fluid working medium is a high-insulation low-boiling-point compound, heat is absorbed by utilizing conversion between liquid and gas phases when the working medium is boiled, the insulation property is good, the heat exchange efficiency is high, and meanwhile, the surface temperature distribution of a cooled device is more uniform and the reliability is better; before the cooling system operates, the system is pumped into a vacuum state through the vacuum tube 10 and then is injected with a proper amount of fluid working medium, the internal operating pressure is lower than the external atmospheric pressure, on one hand, the influence of residual air in the system on the boiling of the working medium is avoided, on the other hand, the leakage of the working medium can be prevented, and the safety is good; the circulating pump 14 can flexibly adjust the heat dissipation efficiency by adjusting the flow speed of the working medium, saves energy, has wide application range and meets different temperature cooling requirements of users; the cooling system can be established on the basis of an old water cooling system, and only the internal circulation cooling mode needs to be replaced by a phase change cooling mode, so that the external cooling part is kept unchanged, and the cost is saved. Meanwhile, the PLC control center monitors the temperature, pressure, flow and liquid level of the system and carries out timely regulation and control according to actual conditions.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the present invention, i.e. all equivalent modifications made according to the present invention should be covered by the scope of the present invention.
Claims (9)
1. An active phase change cooling system is characterized by comprising a heating component, a fluid working medium, an upper branch pipe, a gas collecting pipe, an upper main pipe, an external cooling system, a gas-liquid separator, a gaseous working medium backflow pipe, a liquid storage tank, a lower main pipe, a circulating pump, a liquid collecting pipe and a lower branch pipe;
the outlet of the heating component is communicated with the inlet of the gas collecting pipe through the upper branch pipe, the outlet of the gas collecting pipe is communicated with the outer cooling system and the gas-liquid separator in sequence through the upper main pipe, the gas-liquid separator is communicated with the outer cooling system and the outer cooling system through the gaseous working medium return pipe and simultaneously communicated with the inlet of the liquid storage tank through the upper main pipe, the outlet of the liquid storage tank is communicated with the circulating pump and the liquid collecting pipe through the lower main pipe in sequence, the liquid collecting pipe is communicated with the inlet of the heating component through the lower branch pipe, and the whole system forms a closed circulating loop in which fluid working media are filled.
2. The active phase change cooling system of claim 1, wherein the heat generating component comprises a heat generating element and a heat sink, and the heat generating element and the heat sink are in a valve bank structure connected in parallel or alternately in series.
3. The active phase change cooling system of claim 2, comprising a PLC controller, wherein the inlet and outlet of the heat sink are both provided with a pressure sensor and a thermal resistor, and the central position of the surface of the heat sink is provided with a thermocouple, and the pressure sensor, the thermal resistor and the thermocouple are all connected with the PLC controller.
4. The active phase change cooling system of claim 1, wherein a sight glass is mounted to the manifold outlet.
5. The active phase change cooling system of claim 3, wherein a vacuum tube and a liquid level meter are mounted on an upper portion of the liquid storage tank, and the liquid level meter is connected to the PLC controller.
6. The active phase change cooling system of claim 3, wherein the circulation pump is located below the liquid storage tank, a flow meter is installed between the circulation pump and the liquid collection pipe, and the circulation pump and the flow meter are connected to the PLC.
7. The active phase change cooling system of claim 1, wherein the upper main tube diameter is greater than the upper branch tube diameter and the lower main tube diameter is greater than the lower branch tube diameter.
8. The active phase change cooling system of claim 1, wherein the external cooling system is a fan or a water circulation cooling device.
9. The active phase change cooling system of claim 1, wherein a volume of the reservoir is at least 3 times a volume of fluid medium required by the heat generating component.
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| CN201820986928.5U CN208540355U (en) | 2018-06-25 | 2018-06-25 | Active phase change cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110366359A (en) * | 2019-07-26 | 2019-10-22 | 天津神为科技有限公司 | A kind of bicirculating cooling system for super computer of spring formula |
| CN110636738A (en) * | 2018-06-25 | 2019-12-31 | 南方电网科学研究院有限责任公司 | Active phase change cooling system |
| CN112888243A (en) * | 2020-12-29 | 2021-06-01 | 兰洋(宁波)科技有限公司 | Heat dissipation system for 5G base station |
| WO2021223424A1 (en) * | 2020-05-06 | 2021-11-11 | 中车大连机车研究所有限公司 | Traction converter cooling system based on boiling heat transfer |
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2018
- 2018-06-25 CN CN201820986928.5U patent/CN208540355U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110636738A (en) * | 2018-06-25 | 2019-12-31 | 南方电网科学研究院有限责任公司 | Active phase change cooling system |
| CN110366359A (en) * | 2019-07-26 | 2019-10-22 | 天津神为科技有限公司 | A kind of bicirculating cooling system for super computer of spring formula |
| CN110366359B (en) * | 2019-07-26 | 2020-11-03 | 天津神为科技有限公司 | Fountain type double-circulation super computer cooling system |
| WO2021223424A1 (en) * | 2020-05-06 | 2021-11-11 | 中车大连机车研究所有限公司 | Traction converter cooling system based on boiling heat transfer |
| CN112888243A (en) * | 2020-12-29 | 2021-06-01 | 兰洋(宁波)科技有限公司 | Heat dissipation system for 5G base station |
| CN112888243B (en) * | 2020-12-29 | 2022-06-28 | 兰洋(宁波)科技有限公司 | Heat dissipation system for 5G base station |
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