WO2018109928A1 - Dispositif de séparation gaz-liquide d'un système d'ébullition et de refroidissement - Google Patents

Dispositif de séparation gaz-liquide d'un système d'ébullition et de refroidissement Download PDF

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Publication number
WO2018109928A1
WO2018109928A1 PCT/JP2016/087566 JP2016087566W WO2018109928A1 WO 2018109928 A1 WO2018109928 A1 WO 2018109928A1 JP 2016087566 W JP2016087566 W JP 2016087566W WO 2018109928 A1 WO2018109928 A1 WO 2018109928A1
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WO
WIPO (PCT)
Prior art keywords
swirl chamber
cooling system
gas
boiling cooling
flow path
Prior art date
Application number
PCT/JP2016/087566
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English (en)
Japanese (ja)
Inventor
裕之 牛房
勇吾 浅井
健 篠▲崎▼
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/087566 priority Critical patent/WO2018109928A1/fr
Priority to JP2018556146A priority patent/JP6732042B2/ja
Publication of WO2018109928A1 publication Critical patent/WO2018109928A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427—Cooling by change of state, e.g. use of heat pipes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present invention relates to a gas-liquid separation device in a boiling cooling system having a liquid refrigerant flow path for cooling a heating element such as an electronic device that performs power conversion and a motor.
  • a boil cooling system that cools the heat of a heating element such as an electronic device that performs power conversion and the motor by using the boiling of a liquid refrigerant.
  • the boiling cooling system is a system that transmits heat from the heating element and the motor to the liquid refrigerant in the cooler to boil the liquid refrigerant to cool it using latent heat, and has high cooling efficiency. Steam bubbles are generated inside.
  • the liquid refrigerant containing the vapor bubbles flows from the cooler into the radiator and is condensed, and the vapor bubbles are liquefied and returned to the cooler, but when dissolved gas exists in the liquid refrigerant, the vapor bubbles may not be liquefied. is there.
  • the vapor bubble repeatedly expands and contracts due to a pressure change in the flow path, and sticks to the surface of a pump impeller or the like to be deformed and destroyed. This phenomenon is called cavitation, and when the steam bubble breaks, it may give a large impact to the surroundings and damage the impeller and the like. For this reason, some boiling cooling systems include a gas-liquid separation device to remove the vapor bubbles (see, for example, Patent Document 1).
  • the present invention has been made to solve the above-described problems, and provides a gas-liquid separator for a boiling cooling system that can suppress the occurrence of cavitation with a simple configuration.
  • gas-liquid separation means that the generated vapor bubbles are lost in addition to separating the dissolved gas and the liquid refrigerant that are not liquefied.
  • a gas-liquid separation device of a boiling cooling system is a gas-liquid separation device attached to a boiling cooling system having a flow path filled with liquid refrigerant, and is a cylindrical swivel provided above the flow path.
  • the swirl chamber has a communication port that communicates with the flow path, an inflow portion that allows liquid refrigerant to flow into the swirl chamber from the outside of the boiling cooling system, and liquid refrigerant from the swirl chamber to the outside of the boiling cooling system.
  • An outflow portion that causes the outflow to flow out, the communication port takes in the vapor bubbles generated in the flow path into the swirl chamber, and the inflow portion causes liquid refrigerant to flow into the swirl chamber to generate a swirl flow in the swirl chamber.
  • the swirl chamber separates the vapor bubbles from the liquid refrigerant by swirling flow.
  • the present invention relates to a gas-liquid separator that separates and discharges vapor bubbles generated in a liquid refrigerant of a boiling cooling system from the liquid refrigerant by generating a swirling flow in the liquid refrigerant.
  • FIG. 1 is a perspective view of a boiling cooling system to which a gas-liquid separator according to Embodiment 1 of the present invention is attached. It is a side view of the boiling cooling system to which the gas-liquid separator by Embodiment 1 was attached.
  • FIG. 3 is a schematic view of a cross section taken along line III-III in FIG. 2. It is a figure which shows the refrigerant circuit in the example which attached the boiling cooling system with which the gas-liquid separator by Embodiment 1 was attached to the drive part of the vehicle.
  • FIG. 4 is a schematic diagram showing a state where vapor bubbles are generated in a flow path in the boiling cooling system of FIG. 3.
  • FIG. 3 is a schematic view of a cross section taken along line VI-VI in FIG. 2.
  • FIG. 6 is a diagram showing a modification of the refrigerant circuit of FIG. 4 in the first embodiment. It is the schematic which shows the 3rd modification of the gas-liquid separator by Embodiment 1. FIG. It is the schematic which shows the 4th modification of the gas-liquid separator by Embodiment 1. FIG. It is the schematic which shows the 5th modification of the gas-liquid separator by Embodiment 1.
  • FIG. It is the schematic which shows the 6th modification of the gas-liquid separator by Embodiment 1.
  • FIG. It is the schematic which shows the 7th modification of the gas-liquid separator by Embodiment 1.
  • FIG. 6 is a schematic diagram showing a gas-liquid separator according to Embodiment 2.
  • FIG. It is the schematic which shows the modification of the gas-liquid separator by Embodiment 2.
  • FIG. 1 is a perspective view of a boiling cooling system to which a gas-liquid separation device according to Embodiment 1 of the present invention is attached.
  • FIG. 2 is a side view of the boiling cooling system to which the gas-liquid separator according to Embodiment 1 is attached, and
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG.
  • the boiling cooling system 1 includes a heating element 100, a motor 200, and an annular first flow path 20 provided adjacent to the heating element 100 and the motor 200. . Further, the boiling cooling system 1 has a gas-liquid separation device 10 above the first flow path 20.
  • the heating element 100 is an electronic device such as an inverter that controls the rotational speed of the motor 200, for example.
  • the heating element 100 includes a plurality of elements and a control circuit for controlling on / off of the plurality of elements, and is covered with a cover (not shown) for the purpose of dust prevention, waterproofing, and leakage protection.
  • the heating element 100 is fixed to the outer wall 22 of the first flow path 20 by bonding such as fastening or brazing or welding via grease or a sheet.
  • the motor 200 is a motor for traveling or power generation mounted on, for example, an electric vehicle, a hybrid vehicle, a fuel cell vehicle, or the like. As shown in FIG. 3, the motor 200 is formed by a frame that also serves as the rotor 210 and the stator 220 and the inner wall 21 of the first flow path 20. Then, the three-phase alternating current formed by the heating element 100 is supplied to the stator 220, and the rotor 210 rotates. An annular first flow path 20 filled with the liquid refrigerant 50 is provided around the motor 200 so as to cover the stator 220. The heating element 100 is attached to the outer wall 22 of the first flow path 20.
  • the gas-liquid separator 10 has a cylindrical swirl chamber 11, and the swirl chamber 11 is filled with the liquid refrigerant 50, similar to the first flow path 20.
  • a truncated cone-shaped communication port 12 having a hole penetrating from the upper bottom to the lower bottom is provided.
  • the swirl chamber 11 is connected to the first flow path 20 through the communication port 12. Communicated with.
  • an inflow portion 13 and an outflow portion 14 are provided on the side surface of the swirl chamber 11.
  • the inflow portion 13 and the outflow portion 14 are disposed at positions that are point-symmetric with respect to the center of the swirl chamber 11 in a top view, and are disposed in parallel to each other along the inner wall of the swirl chamber 11. .
  • the inflow portion 13 is provided above the outflow portion 14.
  • the upper portion of the swirl chamber 11 is covered with a conical upper surface plate 19, and a check valve 16 is attached to the uppermost portion that is the center of the upper surface plate 19.
  • the pipe of the second flow path 30 is connected to the inflow portion 13, and the liquid refrigerant 50 flows from the second flow path 30 into the swirl chamber 11 through the inflow portion 13.
  • the pipe of the third flow path 31 is connected to the outflow part 14, and the liquid refrigerant 50 flows out from the swirl chamber 11 to the third flow path 31 through the outflow part 14.
  • the swirling chamber 11 generates a swirling flow by the liquid refrigerant 50 flowing from the inflow portion 13.
  • FIG. 4 is a refrigerant circuit diagram showing a circulation path of the liquid refrigerant 50 when the boiling cooling system 1 having the gas-liquid separation device 10 is attached to the motor 200 of the vehicle.
  • FIG. 5 is a view showing the same cross section as that of the boiling cooling system 1 shown in FIG. 3.
  • FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG.
  • the liquid refrigerant 50 used in the boiling cooling system 1 is sent to the engine 80 of the vehicle by a pump 90.
  • the liquid refrigerant 50 sent to the engine 80 absorbs heat from the engine 80 and becomes high temperature, flows into the radiator 81, and is radiated.
  • the liquid refrigerant 50 that has flowed out of the radiator 81 is stored in the reservoir tank 70. Then, it flows into the swirl chamber 11 of the gas-liquid separator 10 from the reservoir tank 70 via the second flow path 30.
  • the liquid refrigerant 50 that has flowed into the swirl chamber 11 flows out into the third flow path 31 and returns to the pump 90.
  • the liquid refrigerant 50 in the first flow path 20 absorbs the heat of the heating element 100 and the motor 200. Since the heating element 100 has a higher temperature than the motor 200, the liquid refrigerant 50 around the heating element 100 has a higher temperature than the liquid refrigerant 50 in the other first flow paths 20. Then, a temperature gradient is formed in the first flow path 20, and convection as shown by an arrow A in FIG.
  • the inner wall 21 of the first flow path 20 corresponding to the part where the heating element 100 is attached is processed to induce boiling of the liquid refrigerant 50.
  • the process for inducing boiling is to form a small groove or notch called a cavity or a boiling nucleus, a protrusion, or to form irregularities on the surface by sandblasting, metal spraying, oxidation-reduction treatment, or the like.
  • the liquid refrigerant 50 around the heating element 100 boils and a vapor bubble 60 is generated.
  • the vapor bubble 60 having a density sufficiently smaller than that of the liquid refrigerant 50 rises in the first flow path 20 as indicated by an arrow B.
  • the high-temperature liquid refrigerant 50 and the vapor bubble 60 rise through the first flow path 20 and come into contact with the liquid refrigerant 50 flowing through the swirl chamber 11 of the gas-liquid separation device 10 through the communication port 12 to exchange heat. Then, the high-temperature liquid refrigerant 50 is cooled, and a part of the vapor bubbles 60 is condensed and liquefied. Then, the liquid refrigerant 50 whose temperature has decreased and a part of the liquefied vapor bubble 60 return to the first flow path 20 again. Thereafter, the same physical phenomenon is repeated, whereby the heating element 100 and the motor 200 are cooled.
  • the vapor bubbles 60 mixed in the swirl flow C in the swirl chamber 11 are centrifuged and collected at the center of the swirl flow C as indicated by the dashed arrows.
  • the vapor bubbles 60 collected at the center of the swirling flow C ascend along the conical upper surface plate 19 of the swirling chamber 11 as shown in FIG.
  • the check valve 16 is opened, and the vapor bubble 60 is discharged to the outside of the swirl chamber 11.
  • the gas-liquid separation device 10 of the boiling cooling system 1 is attached to the upper part of the boiling cooling system 1 and is generated in the liquid refrigerant 50 of the boiling cooling system 1.
  • the vapor bubble 60 is taken into the swirl chamber 11 of the gas-liquid separator 10, and the vapor bubble 60 is separated from the liquid refrigerant 50 by the swirl flow C and released to the outside.
  • the amount of the vapor bubbles 60 generated by boiling the dissolved gas and the liquid refrigerant 50 in the liquid refrigerant 50 can be reduced, and the occurrence of cavitation caused by the vapor bubbles 60 can be suppressed with a simple configuration. it can.
  • the heating element 100 is attached to the outer wall 22 of the first flow path 20, but the casing of the heating element 100 itself forms a part of the outer wall 22 of the first flow path 20. You may do it.
  • the truncated conical communication port 12 having a hole penetrating from the upper base to the lower base is provided on the bottom surface of the swirl chamber 11.
  • the shape of the communication port 12 may be a cylinder, or may be a truncated pyramid or a prism having a hole penetrating from the upper surface to the lower surface.
  • the communication port may be a simple through hole without a wall surface.
  • the first flow path 20 and the swirl chamber 11 are communicated with each other by the communication port 12 provided at the bottom of the swirl chamber 11, but the present invention is not limited to this.
  • the first communication port 12a for moving the vapor bubble 60 from the first flow path 20 to the swirl chamber 11 and the first flow path 20 from the swirl chamber 11 are shown.
  • a second communication port 12b for moving the liquid refrigerant 50 may be provided.
  • the inflow part 13 and the outflow part 14 are arrange
  • the outflow portion 14 may be arranged perpendicular to the inflow portion 13. Thereby, the number of the steam bubbles 60 flowing out from the outflow part 14 before being separated in the swirl chamber 11 among the steam bubbles 60 moved from the first flow path 20 to the swirl chamber 11 through the communication port 12 is reduced. Can be reduced.
  • the check valve 16 is attached to the upper surface plate 19 of the swirl chamber 11, but the present invention is not limited to this.
  • the check valve 16 instead of the check valve 16, as shown in the circuit diagram of FIG. 10, one end side of the pipe 32 may be attached to the upper surface plate 19 and the other end side of the pipe 32 may be attached to the reservoir tank 70. Then, the vapor bubbles 60 collected on the upper part of the swirl chamber 11 are discharged to the reservoir tank 70 via the pipe 32. Thereby, the pressure in the reservoir tank 70 can be raised and the liquid refrigerant 50 in the reservoir tank 70 can be pushed out. Therefore, suction of the liquid refrigerant 50 by the pump 90 can be assisted.
  • the inflow part 13 and the outflow part 14 were arrange
  • the inflow portion 13 and the outflow portion 14 may be attached to be inclined upward along the upper surface plate 19 of the swirl chamber 11.
  • a strong swirling flow can be generated in the upper portion of the swirl chamber 11, and the vapor bubbles 60 can be efficiently collected at the center of the swirl chamber 11.
  • the arrangement of the outflow portion 14 can suppress the vapor bubble 60 in the swirl chamber 11 from flowing out into the second flow path 30.
  • the outflow part 14 may be made to incline downward conversely with the inflow part 13, or only one of the inflow part 13 or the outflow part 14 may be inclined.
  • the swirl chamber 11 is formed in a cylindrical shape, but the present invention is not limited to this.
  • the cross section in the horizontal plane may be formed in an elliptical shape.
  • the major axis and the minor axis of the elliptical shape may be reversed.
  • the inflow part 13 and the outflow part 14 were each arrange
  • the inflow portion 13 and the outflow portion 14 may be arranged so as to project outside the swirl chamber 11a, respectively, or as a sixth modification shown in FIG.
  • the inflow portion 13 and the outflow portion 14 may be arranged closer to the inside than the outer periphery of the swirl chamber 11.
  • the upper surface board 19 was formed in cone shape, it does not restrict to this.
  • the shape may be such that the cone is inverted.
  • the check valve 16 is attached not to the center of the upper surface plate 19a but to the periphery of the end portion which is the uppermost portion of the upper surface plate 19a.
  • the liquid refrigerant 50 that has flowed into the swirl chamber 11 forms a swirl flow C in the annular channel D formed by the inner wall of the swirl chamber 11 and the upper surface plate 19a.
  • the swirl flow C can be easily generated in the swirl chamber 11.
  • the upper surface plate 19 may be hemispherical convex upward or convex downward. That is, an inclined surface that raises the vapor bubble 60 along the swirl chamber 11 side of the upper surface plate 19 may be formed, and the inclined surface may be formed in a part of the upper surface plate 19.
  • FIG. FIG. 16 is a schematic cross-sectional view of the gas-liquid separator 10a according to the second embodiment of the present invention as viewed from above.
  • the gas-liquid separator 10a of the second embodiment is different from the swirl chamber 11 of the gas-liquid separator 10 of the first embodiment in that the swirl chamber 11a has a plurality of blades 17.
  • Other configurations are the same as those in the first embodiment.
  • a plurality of blades 17 extending upward from the bottom surface of the swirl chamber 11a are attached to the swirl chamber 11a of the gas-liquid separator 10a according to the second embodiment.
  • the plurality of blades 17 may be attached so as to extend downward from the upper surface plate 19 of the swirl chamber 11a, or may be continuous from the upper surface plate 19 to the bottom surface of the swirl chamber 11a.
  • the plurality of blades 17 are formed in a shape that does not hinder the flow of the swirl flow C generated in the swirl chamber 11a, and are arranged along the flow of the swirl flow C.
  • the plurality of blades 17 are attached to the swirl chamber 11a, and the swirling flow C is formed along the plurality of blades 17. Then, the liquid refrigerant 50 flows out from between the plurality of blades 17 toward the outside of the swirl chamber 11a. Thereby, the vapor bubbles 60 mixed in the liquid refrigerant 50 can be easily collected on the center side of the swirl chamber 11a, and the separation of the liquid refrigerant 50 and the vapor bubbles 60 can be promoted.
  • the plurality of blades 17 are attached in the swirl chamber 11a.
  • the present invention is not limited to this.
  • a punching metal 18 having a plurality of holes provided in a cylindrical metal plate as shown in the modification of FIG. 17 may be attached.
  • the punching metal 18 of FIG. 17 may not be a metal plate.
  • a plurality of holes may be provided in a cylindrical plate formed of a resin or ceramic plate.
  • the punching metal 18 of FIG. 17 may not be formed in a cylindrical shape, and one or a plurality of bent metal pieces may be arranged.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

La présente invention concerne un dispositif de séparation gaz-liquide installé dans un système d'ébullition et de refroidissement ayant un chemin d'écoulement rempli d'un liquide de refroidissement, le dispositif de séparation gaz-liquide comprenant une chambre de turbulence cylindrique disposée au-dessus du trajet d'écoulement. La chambre de turbulence comprend : un orifice de communication communiquant avec le trajet d'écoulement; une unité d'alimentation pour introduire un liquide de refroidissement dans la chambre de turbulence à partir de l'extérieur du système d'ébullition et de refroidissement; et une unité de décharge pour décharger le liquide de refroidissement vers l'extérieur du système d'ébullition et de refroidissement à partir de la chambre de turbulence. L'orifice de communication souffle des bulles de vapeur générées à l'intérieur du chemin d'écoulement vers la chambre de turbulence. L'unité d'alimentation achemine le liquide de refroidissement vers la chambre de turbulence, et génère un écoulement tourbillonnant dans la chambre de turbulence. La chambre de turbulence sépare les bulles de vapeur du liquide de refroidissement au moyen du flux tourbillonnant.
PCT/JP2016/087566 2016-12-16 2016-12-16 Dispositif de séparation gaz-liquide d'un système d'ébullition et de refroidissement WO2018109928A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2016/087566 WO2018109928A1 (fr) 2016-12-16 2016-12-16 Dispositif de séparation gaz-liquide d'un système d'ébullition et de refroidissement
JP2018556146A JP6732042B2 (ja) 2016-12-16 2016-12-16 沸騰冷却システムの気液分離装置

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PCT/JP2016/087566 WO2018109928A1 (fr) 2016-12-16 2016-12-16 Dispositif de séparation gaz-liquide d'un système d'ébullition et de refroidissement

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536592A (zh) * 2019-09-23 2019-12-03 中航光电科技股份有限公司 一种相变冷却系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55176570U (fr) * 1979-06-05 1980-12-18
JPS5853153U (ja) * 1981-10-06 1983-04-11 株式会社東芝 沸騰冷却装置
JP2013120055A (ja) * 2011-12-07 2013-06-17 Hyundai Motor Co Ltd 車両用ラジエーター
JP2014183107A (ja) * 2013-03-18 2014-09-29 Fujitsu Ltd 冷却装置
JP2015140735A (ja) * 2014-01-29 2015-08-03 いすゞ自動車株式会社 冷却補助装置
JP2015229144A (ja) * 2014-06-05 2015-12-21 マツダ株式会社 気液分離装置
WO2016159056A1 (fr) * 2015-03-30 2016-10-06 日本電気株式会社 Dispositif de distribution de milieu thermique et procédé de distribution de milieu thermique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55176570U (fr) * 1979-06-05 1980-12-18
JPS5853153U (ja) * 1981-10-06 1983-04-11 株式会社東芝 沸騰冷却装置
JP2013120055A (ja) * 2011-12-07 2013-06-17 Hyundai Motor Co Ltd 車両用ラジエーター
JP2014183107A (ja) * 2013-03-18 2014-09-29 Fujitsu Ltd 冷却装置
JP2015140735A (ja) * 2014-01-29 2015-08-03 いすゞ自動車株式会社 冷却補助装置
JP2015229144A (ja) * 2014-06-05 2015-12-21 マツダ株式会社 気液分離装置
WO2016159056A1 (fr) * 2015-03-30 2016-10-06 日本電気株式会社 Dispositif de distribution de milieu thermique et procédé de distribution de milieu thermique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536592A (zh) * 2019-09-23 2019-12-03 中航光电科技股份有限公司 一种相变冷却系统

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