WO2019151375A1 - Appareil de conversion d'énergie électrique et procédé de fabrication de caloduc à vibration auto-excité - Google Patents

Appareil de conversion d'énergie électrique et procédé de fabrication de caloduc à vibration auto-excité Download PDF

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Publication number
WO2019151375A1
WO2019151375A1 PCT/JP2019/003306 JP2019003306W WO2019151375A1 WO 2019151375 A1 WO2019151375 A1 WO 2019151375A1 JP 2019003306 W JP2019003306 W JP 2019003306W WO 2019151375 A1 WO2019151375 A1 WO 2019151375A1
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WIPO (PCT)
Prior art keywords
self
heat pipe
excited vibration
vibration heat
flow paths
Prior art date
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PCT/JP2019/003306
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English (en)
Japanese (ja)
Inventor
史花 鍋島
西原　淳夫
陽介 安田
秀一 寺門
秋山　悟
Original Assignee
株式会社日立製作所
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Priority to JP2019569211A priority Critical patent/JP7010974B2/ja
Publication of WO2019151375A1 publication Critical patent/WO2019151375A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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 power conversion device to which a self-excited vibration heat pipe is applied and a method for manufacturing the self-excited vibration heat pipe, and is suitable as a power conversion device for a railway vehicle.
  • the self-excited oscillating heat pipe is generally constituted by a fine stroke meandering flow path in the order of mm, and the working fluid is sealed in a state in which liquid columns and air columns are alternately present due to surface tension.
  • a plurality of heat receiving portions (high temperature portions) and heat radiating portions (low temperature portions) are alternately provided in the flow path, and the liquid column is formed by pressure increase due to bumping at the heat receiving portions and pressure decrease due to condensation at the heat radiating portions.
  • the air column vibrates itself and transports heat.
  • Patent Document 1 discloses a structure in which pore groups of a porous flat tube are connected to each other at portions close to both ends, and the flat tube is reshaped so as to meander a high temperature portion and a low temperature portion many times. A self-excited vibration heat pipe is described.
  • the inventor of the present application diligently studied the application of the self-excited vibration heat pipe to the cooling device for a railway vehicle power converter, and as a result, the following knowledge was obtained.
  • the power conversion device for controlling the electric motor that drives the railway vehicle is generally installed under the floor of the railway vehicle, and the cooling device for the power conversion device is also installed under the floor similarly.
  • Railcars are not only expected to be used in various environments because they travel outdoors, but are also more strongly affected by external temperature changes due to speed changes. For this reason, the cooling device for a railway vehicle power converter is required to operate in various environments.
  • the self-excited vibration heat pipe since the self-excited vibration heat pipe has a tendency that the gravity dependency becomes smaller as the number of heat receiving portions and heat radiating portions in contact with the flow path is larger, a one-stroke serpentine flow path structure is generally adopted.
  • a structure having a long flow path length such as a one-stroke serpentine flow path structure, faces the following problems when applied to a railway vehicle.
  • the self-excited vibration heat pipe transports heat by moving the hydraulic fluid by self-excited vibration. Therefore, if the movement resistance of the hydraulic fluid is large, the hydraulic fluid is difficult to vibrate and the cooling performance is deteriorated.
  • the magnitude of this movement resistance depends on, for example, the viscosity of the hydraulic fluid.
  • the viscosity of the hydraulic fluid tends to increase as the temperature decreases, the cooling performance of the self-excited vibration heat pipe decreases in a low temperature environment. Or, there is a concern that the self-excited vibration heat pipe stops operating.
  • the one-stroke serpentine flow path structure described in Patent Document 1 is likely to be affected by viscosity in a low temperature environment because of the long flow path length, and there is a concern that the usable temperature range is not sufficient.
  • the self-excited vibration heat pipe tends to make it difficult for bubbles to vibrate when the calorific value is small.
  • the power conversion device for a railway vehicle generally generates a large amount of heat when the motor is driven, but there is a state where the amount of heat generated is small without driving the motor such as during coasting. large.
  • the flow path length of the self-excited vibration heat pipe is designed to be long by assuming only the maximum heat generation amount, or when the flow path is provided with a branch, the performance with a low heat generation amount that increases the viscosity of the working fluid May decrease.
  • An object of the present invention is to expand the usable temperature range as a cooling device including a self-excited vibration heat pipe used for a moving body such as a railway vehicle, and to deteriorate performance when a hole is suddenly opened in a flow path. Is to improve reliability.
  • a power conversion device includes a semiconductor element that constitutes a power conversion circuit and a cooling device that cools heat generated from the semiconductor element.
  • the cooling device includes a self-excited vibration heat pipe, and the self-excited vibration heat pipe. Has a plurality of sealed flow paths arranged in parallel.
  • the present invention even in a low-temperature environment in which the viscosity of the hydraulic fluid increases, it is possible to extend the usable temperature range as a cooling device including a self-excited vibration heat pipe while suppressing the movement resistance of the hydraulic fluid. .
  • the cooling performance is reduced by minimizing the damage only to the damaged flow path and allowing the rest to operate as a self-excited vibration heat pipe. Can be minimized.
  • FIG. Sectional drawing which looked at the cooling device of the power converter device in Example 1 from the advancing direction of the railway vehicle.
  • FIG. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, showing a cross-sectional structure of a self-excited vibration heat pipe provided in the power conversion device in the first embodiment.
  • the perspective view which shows the structure in the Example 1 when the self-excited vibration heat pipe meanders so that a heat receiving part and a thermal radiation part may reciprocate alternately.
  • FIG. 9 is a cross-sectional view taken along line BB in FIG. 8 showing the fourth and fifth steps of the method for manufacturing the self-excited vibration heat pipe mounted on the power conversion device in the third embodiment.
  • the schematic diagram which shows the flow-path process to the stage before hydraulic fluid enclosure of the self-excited vibration heat pipe mounted in the power converter device in Example 4.
  • FIG. The perspective view which shows the structure of the power converter device in Example 5.
  • FIG. 7 The perspective view which shows the structure of the power converter device in Example 7.
  • FIG. 8 The perspective view which shows the structure of the power converter device in Example 8.
  • FIG. The schematic of the flow-path structure of the self-excited vibration heat pipe provided in the power converter device in Example 9.
  • FIG. 10 The schematic of the flow-path structure of the self-excited vibration heat pipe provided in the power converter device in Example 10.
  • a railway vehicle power conversion device including a semiconductor element that constitutes a power conversion circuit and a cooling device that cools heat generated from the semiconductor element, at least a part of the cooling device is arranged in parallel. And providing a self-excited vibration heat pipe having a plurality of sealed flow paths.
  • At least a part of the plurality of flow paths arranged in parallel is connected to each other, and the working fluid is poured into the plurality of flow paths at the same time to eliminate the communication, so that at least a part of the flow paths is parallel.
  • the plurality of closed flow paths have a linear shape parallel to the longitudinal direction of the self-excited vibration heat pipe.
  • the plurality of sealed flow paths are U-shaped.
  • a plurality of sealed flow paths have the same length.
  • the embodiment discloses that one end of the self-excited vibration heat pipe in the longitudinal direction is crushed.
  • the embodiment discloses that a plurality of sealed flow paths in which at least a part thereof are arranged in parallel are produced by crushing the plurality of flow paths.
  • the self-excited vibration heat pipe has a structure bent in a wave shape in the longitudinal direction.
  • a header part for flowing a working fluid into a plurality of flow paths is formed by removing a partition portion at one end of the plurality of flow paths and joining a sealing member.
  • the self-excited vibration heat pipe bent into a corrugated shape is supported by the heat receiving member, and one end of the self-excited vibration heat pipe on the side of the hydraulic fluid is long so as to protrude from the heat receiving member. To do.
  • the self-excited vibration heat pipe bent into a corrugated shape is supported by the heat receiving member, and one end of the self-excited vibration heat pipe on the side of the hydraulic fluid is bent so as to be lifted from the heat receiving member. Is disclosed.
  • the self-excited vibration heat pipe bent into a corrugated shape is supported by the heat receiving member, and the heat receiving member has a structure in which the periphery of one end of the self-excited vibration heat pipe on the hydraulic fluid sealing side is cut out. Disclose.
  • the self-excited vibration heat pipe bent into a corrugated shape is supported by the heat receiving member, and one end of the self-excited vibration heat pipe on the side of the hydraulic fluid is directed vertically upward from the heat receiving surface of the heat receiving member. Is disclosed.
  • FIG. 1 is a configuration diagram of a power conversion device mounted on a railway vehicle in the present embodiment.
  • the power conversion device is provided below the floor of the vehicle body of the railway vehicle 200 and controls the rotation speed of the electric motor by changing the frequency of electric power supplied to the electric motor (not shown) that drives the railway vehicle 200.
  • the power conversion device includes a power unit (power conversion circuit) including a plurality of power semiconductor modules 11 and electronic components 20, and a cooling device that cools heat generated when the power unit operates.
  • a power unit power conversion circuit
  • the power conversion device includes a power unit (power conversion circuit) including a plurality of power semiconductor modules 11 and electronic components 20, and a cooling device that cools heat generated when the power unit operates.
  • the power conversion device is fixed in a state of being suspended from the bottom of the vehicle body of the railway vehicle 200, for example.
  • FIG. 2 is a cross-sectional view of the cooling device for the power conversion device as seen from the traveling direction of the railway vehicle in this embodiment.
  • Arrows 101 and 102 indicate the direction of traveling wind generated by traveling in the traveling direction of the railway vehicle (see FIG. 1). Since the railway vehicle moves in either the front or rear direction, traveling wind is generated in either direction of the arrow 101 or 102 accordingly.
  • the cooling device has a heat receiving member 10, a self-excited vibration heat pipe 12, and fins 13.
  • FIG. 3 is a perspective view of the cooling device of the power conversion device in the present embodiment.
  • a plurality of power semiconductor modules 11 are arranged and arranged on the upper surface of the heat receiving member 10.
  • the heat receiving member 10 is made of a metal such as an aluminum alloy, iron, or copper, for example.
  • the power semiconductor module 11 includes a plurality of power semiconductor elements.
  • the power semiconductor element is, for example, an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor).
  • the power semiconductor module 11 is fixed to one surface (upper surface) of the heat receiving member 10 by a screw or the like (not shown) through a member such as grease (not shown).
  • an electrical component 20 such as a circuit for driving the IGBT or the MOSFET is installed.
  • the heat radiating portion 3 is provided on the surface opposite to the surface on which the power semiconductor module 11 is installed in the heat receiving member 10 (the lower side in FIG. 3).
  • the heat radiating section 3 is constituted by, for example, a self-excited vibration heat pipe 12 and a wave-shaped fin 13 made of an aluminum alloy or the like.
  • a self-excited vibration heat pipe 12 As the fins 13, wave-shaped fins are used in this embodiment, but other fins may be used.
  • the self-excited vibration heat pipe 12 shown in FIG. 2 has a shape in which a plate-like heat pipe is bent into a wave shape in the longitudinal direction of the heat pipe.
  • Each of the heat receiving member 10, the self-excited vibration heat pipe 12 and the fin 13 is fixed by brazing or the like.
  • FIG. 4 is a schematic diagram showing a flow path structure of a self-excited vibration heat pipe used as a cooling device of a power conversion device in the present embodiment.
  • the self-excited oscillating heat pipe 12 is configured by a plurality of sealed hydraulic fluid flow paths 1 that are arranged in parallel and parallel and do not communicate with each other in each row.
  • a partition 4 is provided between the hydraulic fluid channels 1.
  • the channel diameter and the width of the partition part 4 are each in the order of mm, and the channel length is sufficiently longer than the channel diameter.
  • FIG. 5 is a diagram showing a cross-sectional structure of the self-excited vibration heat pipe shown in FIG. 4 as a cross section AA in FIG.
  • the thickness of the self-excited vibration heat pipe 12 is set to the order of mm on the basis of thermal conductivity and ease of processing.
  • the self-excited vibration heat pipe has a very small flow path diameter
  • the movement resistance of the hydraulic fluid is easily affected by the viscosity increase, and there is a concern about the effect of the viscosity increase in a low temperature environment.
  • the closed flow channel does not have a meandering turn portion in the in-plane direction of the self-excited vibration heat pipe 12.
  • the movement resistance of the hydraulic fluid is smaller than that of the prior art with a one-stroke serpentine flow path structure.
  • the air column and the liquid column become easier to move and the cooling performance can be improved.
  • the moving resistance of the working fluid can be reduced as compared with the prior art of the one-stroke serpentine flow channel structure, so that the temperature range usable as a cooling device is widened.
  • the movement resistance of the hydraulic fluid is small, it can be operated as a self-excited vibration heat pipe even in a small calorific value region where bubbles are difficult to vibrate.
  • the maximum heat transport amount is assumed when handling large power as in a railway vehicle power converter, but it is possible to cope with a small amount of heat generated during coasting, that is, the amount of heat generated. It can also be applied when the range is wide.
  • the self-excited vibration heat pipe has a thin wall around the hydraulic fluid flow path 1, it is highly likely to be damaged by a collision of flying objects.
  • the flow path structure having a plurality of flow paths that are not in communication with each other as in the present embodiment can be damaged even when one part of the self-excited vibration heat pipe 12 is damaged. Only the damaged flow path is limited, and the remaining flow paths continue to operate as self-excited vibration heat pipes, thereby reducing the deterioration in cooling performance.
  • the cooling performance is comparable to that of a closed flow path without communication. Therefore, it is possible to estimate the average cooling performance for each channel. Thereby, it is possible to estimate the ratio of the number of broken channels among all the channels and the change in cooling performance when the number of channels is increased or decreased.
  • FIG. 6 is a perspective view in the case where the self-excited vibration heat pipe in this embodiment has a meandering structure in which the heat receiving portion and the heat radiating portion reciprocate alternately.
  • An example is shown in which the self-excited vibration heat pipe 12 meanders so as to alternately reciprocate between the heat receiving portion 2 and the heat radiating portion 3 and is bent into a corrugated shape.
  • the meandering pitch and meandering width are constant, and the heat receiving portion 2 is flat so that it can contact the heat receiving member 10.
  • the meandering pitch refers to the distance between adjacent meandering turns of the self-excited vibration heat pipe 12.
  • the meandering width means the distance from the heat receiving portion 2 of the self-excited vibration heat pipe 12 to the tip portion of the heat radiating portion 3.
  • the heat dissipating part 3 is a part other than the part in contact with the heat receiving member, and dissipates heat by taking natural convection, vehicle traveling wind, etc. between the self-excited vibration heat pipes 12.
  • the heat receiving portion 2 of the self-excited vibration heat pipe 12 has a structure that can be easily attached to the heat receiving member 10 or the heating element.
  • heat insulating portion between the heat receiving portion 2 and the heat radiating portion 3 that does not receive heat or radiate heat outside the flow path but transports heat.
  • the distance between the heat receiving part 2 and the heat radiating part 3 needs to be so short that the hydraulic fluid in the heat receiving part 2 reaches the heat radiating part 3 due to the vibration of the hydraulic fluid.
  • hydrocarbons such as water, alcohols and butane
  • hydrofluorocarbons such as water, alcohols and butane
  • hydrofluoroethers such as water, alcohols and butane
  • hydrofluoroolefins such as water, alcohols and butane
  • perfluoroketones such as water, alcohols and butane
  • R1336mzz (Z) which is a hydrofluoroolefin (HFO)
  • HFO hydrofluoroolefin
  • R1336mzz (Z) does not contain chlorine, it is chemically stable with respect to an aluminum alloy. The cooling performance can be maintained for a long time without corroding the excitation vibration heat pipe 12.
  • HFOs such as R1224yd (Z), R1234yf, R1234ze (E), R1123, R1234ze (Z), R1336mzz (E), R1233zd (Z) or R1233zd (Z) are used. Also good. Since HFOs have a low global warming potential and ozone depletion potential, the impact on the environment is reduced even when some of the flow paths are damaged by the impact of flying objects and the working fluid is released into the atmosphere. be able to.
  • the loss caused by the operation of the power semiconductor element becomes heat.
  • the heat generated from the power semiconductor element is transmitted to the self-excited vibration heat pipe 12 through the heat receiving member 10.
  • the hydraulic fluid sealed in the hydraulic fluid flow path 1 bumps at a plurality of heat receiving portions 2 that are in contact with the heat receiving member 10, causing a pressure increase.
  • the hydraulic fluid vibrates in the flow path, so that heat is transmitted to the tip of the heat radiating portion 3 of the self-excited vibration heat pipe 12.
  • the configuration of the present embodiment not only expands the temperature range and heat generation range that can be used as a cooling device, but also conventional cooling of self-excited vibration heat pipes when a part of the cooling device is damaged due to collision of flying objects, etc. It is possible to improve the reliability by reducing the performance degradation of the entire cooling device as compared with the device. Furthermore, since the cooling performance in units of flow paths can be estimated, the number of damaged flow paths among all the flow paths or the cooling performance when the number of flow paths is changed can be estimated.
  • This embodiment is different from the first embodiment in that the hydraulic fluid flow path 1 is U-shaped with an independent sealed flow path.
  • the difference from the first embodiment will be mainly described.
  • FIG. 7 is a schematic diagram showing a flow path structure of a self-excited vibration heat pipe used as a cooling device of a power conversion device in the present embodiment.
  • the flow paths arranged in parallel in parallel communicate with each other at one end in the longitudinal direction of the self-excited vibration heat pipe 12 to form a substantially U-shaped sealed flow path group.
  • the communicating part of the hydraulic fluid flow path 1 may be in the middle of the self-excited vibration heat pipe 12. Moreover, the communication location of each sealed flow path does not need to be unified.
  • a channel group may be mixed.
  • each closed flow channel communicating with each other is shorter than that of the prior art, when a part of the cooling device is damaged due to a collision of a flying object, the conventional self-excited vibration Compared to the heat pipe cooling device, the performance deterioration of the entire cooling device can be reduced.
  • the cooling performance of each flow channel group can be estimated, and the number of damaged flow channel groups or the number of flow channel groups among all the flow channel groups can be estimated. Cooling performance can be estimated.
  • Performance degradation can be reduced.
  • This example is a method for manufacturing a self-excited vibration heat pipe according to Examples 1 and 2.
  • FIG. 8 is a schematic diagram showing a process of manufacturing a flow path up to a previous stage in which a working fluid of a self-excited vibration heat pipe used as a cooling device of a power conversion device is sealed in the present embodiment.
  • a working fluid of a self-excited vibration heat pipe used as a cooling device of a power conversion device is sealed in the present embodiment.
  • FIG. 8A shows the first step of the flow path manufacturing in the present embodiment.
  • a multi-hole tube 30 having a large number of through holes 31 arranged in parallel in the longitudinal direction is prepared.
  • FIG. 8B shows the second step of the flow path manufacturing in the present example.
  • One end of the multi-hole tube 30 is sealed by joining a plate-shaped or square-shaped sealing member 32 having the same thickness and width as the multi-hole tube 30 by a joining means such as brazing or welding.
  • sealing may be performed by crushing one end of the multi-hole tube 30.
  • FIG. 8C shows the third step of the flow path manufacturing in the present example.
  • a part of the partition portion 4 separating each flow path is removed so that adjacent flow paths communicate with each other, thereby forming a communication flow path 34.
  • FIG. 8D shows the fourth step of the flow path manufacturing in the present example.
  • a plate-shaped or square-shaped sealing member 33 having the same thickness and width as the multi-hole tube 30 is attached to the side of the both ends of the self-excited vibration heat pipe as the working fluid sealing port, and joining means such as brazing or welding.
  • joining means such as brazing or welding.
  • FIG. 8 (e) shows the fifth step of the flow path manufacturing in the present embodiment.
  • the hydraulic fluid filling port 5 is attached to the header part 35.
  • the hydraulic fluid sealing port 5 is a hollow tube having a diameter equivalent to the channel diameter, and communicates with the communication channel 34. As long as it communicates with the communication channel 34, one of the channels may be extended.
  • the above-described fourth and fifth steps are welded to the multi-hole tube 30 in a state where the hydraulic fluid sealing port is already attached to form the header portion 35 including the communication channel 34. It may be replaced with the process of.
  • the manufacturing method of the meandering flow path described in Patent Document 1 includes a step of removing every other part of the partition that separates the flow paths at both ends of the multi-hole tube.
  • a part of the partition wall that separates the flow paths needs to be removed only on one side of the multi-hole tube. All the partition walls inside the first row and the last row of the channel of the hole tube may be removed.
  • the working fluid sealing port 5 at the tip of the communication channel 34, the working fluid can be sealed in all the channels at once.
  • each flow path communicating with the communication flow path 34 When the length of each flow path communicating with the communication flow path 34 is equal, the working fluid can be poured uniformly into all the flow paths, and the cooling performance of each flow path is equalized when operating as a cooling device. Let me.
  • the self-excited vibration heat pipe 12 is bent into a meandering shape a plurality of times so as to have the same reciprocal width and pitch and a flat surface for contacting the heat receiving member.
  • the heat receiving member 10 is brought into contact with one end portion forming the heat receiving portion of the self-excited vibration heat pipe 12 and the fins 13 are attached between the self-excited vibration heat pipes.
  • a required amount of hydraulic fluid is sealed in the flow path of the self-excited vibration heat pipe 12 through the hydraulic fluid sealing port 5.
  • FIG. 9 is a cross-sectional view taken along the line BB of FIG. 8, regarding the fourth and fifth steps of manufacturing the cooling device using the self-excited vibration heat pipe.
  • FIG. 9 after sealing the hydraulic fluid flow path in the header portion 35 through the third process, a process in the case of manufacturing a plurality of sealed flow paths that do not communicate with each other is shown.
  • FIGS. 9A and 9B show the fourth step of manufacturing the cooling device described above.
  • the header part 35 is crushed with tools, such as a vise, in the crushing position 36 of a communication flow path so that all the communication flow paths 34 may be crushed.
  • the crushed header portion 35 has a shape as shown in FIG.
  • FIGS. 9C and 9D show the fifth step of manufacturing the cooling device described above. As shown in (c), the crushed header portion 35 is folded inward, and is crushed at the crushing position 37 after being folded, close to the end of the self-excited vibration heat pipe 12. Finally, the shape of the crushed header part is as shown in (d). The hydraulic fluid filling port 5 (not shown) is removed before or after being bent and crushed.
  • the end of the flow path is crushed, folded, and then crushed again, thereby improving the sealing performance of the flow path and preventing refrigerant leakage from the flow path end. Can do.
  • channel manufacturing method and cooling device manufacturing method may be applied when manufacturing a plurality of channel groups (channel structure of Example 2) that are in communication with each other. Good.
  • the present embodiment does not require a high level of technology when manufacturing the flow path, so the time and cost can be reduced, and the number of times the hydraulic fluid is sealed can be reduced by the communication flow path. Further, when the cooling device is manufactured, the end of the flow path is crushed, bent, and then crushed again, so that the airtightness of the flow path is improved and refrigerant leakage from the flow path end can be prevented.
  • the present embodiment is a method of manufacturing a self-excited vibration heat pipe in which the end portion on the side of the hydraulic fluid sealing port is sealed with a hydraulic fluid sealing port and a sealing member with a communication channel.
  • the difference from the first to third embodiments will be mainly described.
  • FIG. 10 is a schematic diagram showing the flow path manufacturing process up to the previous stage in which the working fluid of a self-excited vibration heat pipe used as a cooling device of the power conversion device in this embodiment is sealed.
  • 10 (a) and 10 (b) show the first and second steps of the flow channel manufacturing in the present embodiment. Both steps are the same as the first and second steps of Example 3.
  • 10 (c) and 10 (d) show a third step of the flow path manufacturing in the present embodiment.
  • the end portion on the side of the hydraulic fluid sealing port 5 is the same in material, thickness and width as the multi-hole tube, and is sealed by a sealing member 38 having a hydraulic fluid sealing port and a communication channel.
  • Forming a header portion including The sealing member 38 with the hydraulic fluid sealing port and the communication channel is manufactured by a method such as removing the communication channel portion from a plate-shaped or rectangular member.
  • the step of removing the partition walls between the flow paths (third process of the third embodiment) can be omitted at the time of manufacturing the flow path as compared with the third embodiment, and the process is configured only by joining. Thereby, time and cost can be suppressed, and the number of times the hydraulic fluid is sealed by the communication channel can be reduced. Further, since the members that form the communication flow path are joined, the communication flow path diameter is constant, and when the hydraulic fluid is sealed in each flow path, the variation in the hydraulic fluid filling rate between the flow paths is reduced.
  • This embodiment is characterized by a structure in which a self-excited vibration heat pipe is supported by a heat receiving member.
  • a self-excited vibration heat pipe is supported by a heat receiving member.
  • FIG. 11 is a perspective view showing the structure of the power conversion device including the cooling device in this embodiment, and shows an example of the end portion structure of the self-excited vibration heat pipe on the side of the hydraulic fluid filling port.
  • the end of the self-excited vibration heat pipe 12 on the side where the hydraulic fluid sealing port 5 is provided is set long enough to protrude from the end of the heat receiving member 10.
  • the side of the self-excited vibration heat pipe 12 on which the hydraulic fluid is sealed is made long enough to protrude from the heat receiving member 10, whereby the side of the self-excited vibration heat pipe 12 on which the hydraulic fluid sealing port 5 is provided.
  • a space for using the work tool can be secured. Thereby, the time and cost when manufacturing the power converter device including a cooling device can be held down.
  • the present embodiment is characterized in that one end of the self-excited vibration heat pipe on the side where the hydraulic fluid is sealed is bent so as to be lifted from the heat receiving member.
  • FIG. 12 is a perspective view showing the structure of the power conversion device including the cooling device in the present embodiment, showing an example of the end portion structure on the side of the hydraulic fluid sealing port of the self-excited vibration heat pipe in the present embodiment.
  • the end of the self-excited vibration heat pipe 12 on the side where the hydraulic fluid sealing port 5 is provided is bent once in a direction perpendicular to the heat receiving member 10 as a direction away from the heat receiving member 10, and further bent once in a direction parallel to the heat receiving member 10. Accordingly, the end portion on the side where the hydraulic fluid sealing port 5 is provided is made to float from the heat receiving member 10.
  • the end of the self-excited vibration heat pipe on the side where the hydraulic fluid is sealed is shaped so as to be lifted from the heat receiving member, so that the end of the self-excited vibration heat pipe 12 on the side where the hydraulic fluid is sealed is provided.
  • a space for using the work tool can be secured. Thereby, the time and cost when manufacturing the power converter device including a cooling device can be held down.
  • the present embodiment is characterized in that the heat receiving member has a structure in which the periphery of one end of the self-excited vibration heat pipe on the hydraulic fluid sealing side is cut out.
  • the difference from the first to sixth embodiments will be mainly described.
  • FIG. 13 is a perspective view showing the structure of the power conversion device including the cooling device in this embodiment, and shows an example of the structure of the heat receiving member that supports the self-excited vibration heat pipe.
  • the heat receiving member 10 has a structure in which the periphery of the end portion on the side where the hydraulic fluid sealing port 5 is provided is cut out.
  • the heat receiving member 10 has a structure in which the periphery of one end of the self-excited vibration heat pipe 12 on the hydraulic fluid enclosure side is cut out, so that the self-excited vibration heat pipe 12 on the side where the hydraulic fluid enclosure port 5 is provided.
  • a space for using the work tool can be secured. Thereby, the time and cost when manufacturing the power converter device including a cooling device can be held down.
  • the present embodiment is characterized in that the end portion of the self-excited vibration heat pipe on the hydraulic fluid sealing side has a vertically upward structure from the heat receiving surface of the heat receiving member.
  • the difference from the first to seventh embodiments will be mainly described.
  • FIG. 14 is a perspective view showing the structure of the power conversion device including the cooling device in the present embodiment, and shows the positional relationship between the structure of the self-excited vibration heat pipe and the heat receiving member.
  • the end portion of the self-excited vibration heat pipe 12 is provided on the heat radiating portion side, and the hydraulic fluid filling port 5 is installed in the opposite direction to the heat receiving member 10 at the end of the end portion of the self-excited vibration heat pipe 12.
  • the hydraulic fluid sealing port 5 may be attached to any position of the self-excited vibration heat pipe 12 as long as it is on the heat radiating portion side.
  • the end portion of the self-excited vibration heat pipe on the side where the hydraulic fluid is encapsulated is lifted vertically upward from the heat receiving portion, so that the self-excited oscillation heat pipe 12 on the side where the hydraulic fluid enclosure port 5 is provided.
  • a space for using the work tool can be secured. Thereby, the time and cost when manufacturing the power converter device including a cooling device can be held down.
  • this embodiment is characterized in that a part of the hydraulic fluid channel 1 is communicated with an independent sealed channel.
  • the difference from the first embodiment will be mainly described.
  • FIG. 15 is a schematic diagram showing a flow path structure of a self-excited vibration heat pipe used as a cooling device for a power conversion device in the present embodiment.
  • the hydraulic fluid channels 1 arranged in parallel in parallel communicate with each other at both ends in the longitudinal direction of the self-excited vibration heat pipe 12 to form a sealed channel group composed of two or more rows of hydraulic fluid channels 1.
  • a plurality of closed flow channel groups are formed inside one self-excited vibration heat pipe 12.
  • the communication location of the hydraulic fluid flow path 1 is not limited to both ends, and may be one end or the middle of the self-excited vibration heat pipe 12. Moreover, the communication location of each sealed flow path does not need to be unified.
  • a road group may be mixed.
  • the entire cooling device is compared with the conventional self-excited vibration heat pipe cooling device. Performance degradation can be reduced.
  • the cooling performance since it has at least a communication portion with the adjacent flow path, when limited to a single sealed flow path, compared with Example 1 having a structure without communication, due to collision of flying objects, etc. Although some deterioration of the cooling performance at the time of breakage is inevitable, since the number of parallel flow paths can be increased per unit area, it is possible to obtain a cooling performance that is not significantly different from that of the first embodiment. . In addition, since the flow path length is still short and the hydraulic fluid movement resistance is small compared to the prior art with a one-stroke serpentine flow path structure, the temperature range usable as a cooling device can be widened.
  • the cooling device may be damaged. Performance degradation can be reduced.
  • FIG. 16 is a schematic diagram showing a flow path structure of a self-excited vibration heat pipe used as a cooling device for a power conversion device in the present embodiment.
  • the hydraulic fluid flow paths 1 arranged in parallel in one self-excited oscillating heat pipe 12 are arranged at both ends in the longitudinal direction of the self-excited oscillating heat pipe 12. Two or more rows communicate with each other to form one sealed flow path, and a plurality of self-excited vibration heat pipes 12 are installed.
  • the communication location of the hydraulic fluid flow path 1 is not limited to both ends as shown in FIG. 16, and may be one end or in the middle of the self-excited vibration heat pipe 12. Moreover, the communication location of each sealed flow path does not need to be unified.
  • the self-excited vibration heat pipe 12 in which a plurality of self-excited vibration heat pipes 12 are arranged with a plurality of one-line closed flow paths that are not in communication with each other as in the first embodiment, as in the present embodiment.
  • Such self-excited vibration heat pipes 12 having a group of sealed flow paths communicating with each other in two or more rows may be mixed.
  • the entire cooling device is compared with the conventional self-excited vibration heat pipe cooling device. Performance degradation can be reduced.
  • the cooling performance of each self-excited vibration heat pipe can be estimated, and all of the self-excited vibration heat pipes are damaged. It is possible to estimate the cooling performance when the number of self-excited vibration heat pipes or the number of self-excited vibration heat pipes is increased or decreased.
  • the cooling performance since it has at least a communication portion with the adjacent flow path, when limited to a single sealed flow path, compared with Example 1 having a structure without communication, due to collision of flying objects, etc. Although some deterioration of the cooling performance at the time of breakage is inevitable, since the number of parallel flow paths can be increased per unit area, it is possible to obtain a cooling performance that is not significantly different from that of the first embodiment. . In addition, since the flow path length is still short and the hydraulic fluid movement resistance is small compared to the prior art with a one-stroke serpentine flow path structure, the temperature range usable as a cooling device can be widened. Furthermore, since the single self-excited vibration heat pipe 12 has a compact size as compared with the first and ninth embodiments, it is possible to flexibly cope with the space at the installation location.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transportation (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Inverter Devices (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Le but de la présente invention est d'étendre une plage de température utilisable, de réduire la détérioration des performances pendant un dommage soudain à un passage de fluide, et d'améliorer la fiabilité, dans un dispositif de refroidissement pourvu d'un caloduc à vibration auto-excité utilisé dans un corps mobile tel qu'un véhicule ferroviaire. A cet effet, l'appareil de conversion d'énergie électrique selon la présente invention comprend : un élément semi-conducteur qui constitue un circuit de conversion d'énergie électrique ; et un dispositif de refroidissement qui refroidit la chaleur générée à partir de l'élément semi-conducteur, le dispositif de refroidissement étant pourvu d'un caloduc à vibration auto-excité et le caloduc à vibration auto-excité ayant une pluralité de passages de fluide fermés disposés en parallèle.
PCT/JP2019/003306 2018-01-31 2019-01-31 Appareil de conversion d'énergie électrique et procédé de fabrication de caloduc à vibration auto-excité WO2019151375A1 (fr)

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JP2021085609A (ja) * 2019-11-28 2021-06-03 株式会社日立製作所 移動体用の冷却装置及び電力変換装置
JP7500277B2 (ja) 2020-05-28 2024-06-17 株式会社日立製作所 自励振動ヒートパイプ、冷却装置及び電力変換装置

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JPH0914875A (ja) * 1995-06-29 1997-01-17 Akutoronikusu Kk 多孔扁平金属管ヒートパイプ式熱交換器
JP2000356486A (ja) * 1999-06-11 2000-12-26 Furukawa Electric Co Ltd:The 板型ヒートパイプおよびその製造方法
JP2003229520A (ja) * 2002-02-04 2003-08-15 Komatsu Ltd 冷却装置の製造方法
JP2004229500A (ja) * 2004-05-11 2004-08-12 Toshiba Corp 車両用電力変換装置
JP2012507680A (ja) * 2008-11-03 2012-03-29 ナンキン エコウェイ エナジー テクノロジー カンパニー．， リミテッド． 微細管配列を有するマイクロヒートパイプアレイ及びその作製方法並びに熱交換システム
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021085609A (ja) * 2019-11-28 2021-06-03 株式会社日立製作所 移動体用の冷却装置及び電力変換装置
JP7430521B2 (ja) 2019-11-28 2024-02-13 株式会社日立製作所 移動体用の冷却装置及び電力変換装置
JP7500277B2 (ja) 2020-05-28 2024-06-17 株式会社日立製作所 自励振動ヒートパイプ、冷却装置及び電力変換装置

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