WO2020158324A1 - Heat sink for self-oscillating heat pipe - Google Patents

Heat sink for self-oscillating heat pipe Download PDF

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Publication number
WO2020158324A1
WO2020158324A1 PCT/JP2020/000365 JP2020000365W WO2020158324A1 WO 2020158324 A1 WO2020158324 A1 WO 2020158324A1 JP 2020000365 W JP2020000365 W JP 2020000365W WO 2020158324 A1 WO2020158324 A1 WO 2020158324A1
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WIPO (PCT)
Prior art keywords
heat
self
excited vibration
heat pipe
heat receiving
Prior art date
Application number
PCT/JP2020/000365
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French (fr)
Japanese (ja)
Inventor
史花 鍋島
陽介 安田
敬介 堀内
秀一 寺門
Original Assignee
株式会社日立製作所
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Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP2020569473A priority Critical patent/JP7133044B2/en
Publication of WO2020158324A1 publication Critical patent/WO2020158324A1/en

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    • 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
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/487—Neutral point clamped inverters

Definitions

  • the present invention relates to a self-excited vibration heat pipe cooler, and is particularly suitable as a cooler for a power conversion device mounted on an electric railway vehicle or the like.
  • the self-excited vibration heat pipe is composed of a one-stroke, one-stroke, small-diameter, meandering flow path, and the working fluid is sealed in a state where liquid columns and air columns alternate due to surface tension.
  • the liquid column and the air column vibrate by self-excitation due to the pressure increase due to bumping in the heat receiving part and the pressure decrease due to condensation in the heat radiating part.
  • Transport the self-excited vibration heat pipe does not require the circulation by gravity, and thus has a freedom in the installation posture and has an advantage that it can be made smaller than the conventional heat pipe.
  • Patent Document 1 a plurality of power semiconductor elements are arranged on one surface of a heat receiving member, and a heat radiating section including a self-excited vibration heat pipe is installed on the opposite surface of the heat receiving member on the other side.
  • An excited oscillatory heat pipe cooler is shown.
  • the inventor of the present application has earnestly studied about applying the self-excited vibration heat pipe to a cooler for a power semiconductor element used in a power conversion device mounted on an electric railway vehicle or the like, and as a result, obtained the following findings. Came to.
  • An electric power conversion device mounted on an electric railway vehicle or the like is installed under a floor of a vehicle for controlling an electric motor that drives the vehicle.
  • the cooler for the power converter is also installed under the floor of the vehicle, it is required to operate as the cooler in various environments.
  • the self-excited vibration heat pipe tends to have less gravity dependency as the number of high-temperature parts and low-temperature parts in contact with the flow path increases. Therefore, as shown in Patent Document 1, a one-stroke writing meandering flow path structure is generally adopted.
  • the structure of the self-excited vibration heat pipe it may be considered to have a flow channel structure in which the flow channels do not communicate with each other.
  • the self-excited vibration heat pipe cooler has, for example, good manufacturability.
  • a structure in which a heat receiving member is joined and a heating element is arranged on the opposite surface is conceivable.
  • the performance in the heat receiving part of the self-excited vibration heat pipe is as follows: Best near the center of the direction, and tends to worsen as it approaches the edges. For this reason, a local temperature rise is likely to occur at the end of the cooler, which may cause a failure when the cooling target is a precision device.
  • the object of the present invention is to improve the cooling performance when the self-excited vibration heat pipe cooler is formed by forming a sealed multi-hole flat tube in a corrugated shape.
  • the self-excited vibration heat pipe cooler forms a corrugated shape by communicating a multi-hole flat tube in a rectangular wave shape in the thickness direction, and the multi-hole flat tube is sealed with a working fluid sealed therein.
  • the self-excited vibration heat pipe having a structure in which the heat receiving portion and the heat radiating portion are alternately arranged, the heat receiving member joined to the heat receiving portion, and the heat receiving member joined to the heat receiving portion are arranged on the surface opposite to the joint surface.
  • a heating element is provided, and at least one of the configuration of the heat receiving section, the configuration of the heat radiating section, the configuration of the heat receiving member, and the configuration of the heating element is changed to input to the self-excited vibration heat pipe via the heat receiving section. It is characterized in that the distribution of the amount of heat generated has a characteristic of becoming smaller from the vicinity of the center in the longitudinal direction of the multi-hole flat tube to the end portion of the multi-hole flat tube.
  • the amount of heat input to the heat receiving part is reduced from near the center in the longitudinal direction of the multi-hole flat tube to the end, and the amount of heat input to the heat receiving part having poor performance near the end in the flat tube longitudinal direction is suppressed.
  • the local temperature rise is suppressed without changing the total heat generation amount, and the performance of the entire cooler is improved.
  • Example 6 It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 6 of this invention. It is a circuit diagram of a three-level inverter shown as a specific example of a heating element having a different heating value.
  • FIG. 1 is a diagram showing a structure of a self-excited vibration heat pipe cooler according to a first embodiment of the present invention from a sectional shape.
  • the self-excited oscillating heat pipe cooler includes a heat receiving member 10 and a heat radiating portion 20 (the wave-shaped self-excited oscillating heat pipe 12 and the wave-shaped fin 13 ).
  • the heat receiving member 10 is made of, for example, a metal such as an aluminum alloy, iron, or copper.
  • One or more heating elements 11 including a power semiconductor element such as a plurality of IGBTs (Insulated Gate Bipolar Transistors) or a plurality of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) are installed on the upper side of the heat receiving member 10. ing.
  • the one or more heating elements 11 are, for example, a power conversion device including the power semiconductor element described above, and a heat receiving member by a screw (not shown) via a member (not shown) such as grease. It is fixed to one surface of 10 (the upper surface in FIG. 1).
  • a heat radiating section 20 is provided on the surface (lower surface in FIG. 1) of the heat receiving member 10 opposite to the surface on which the heating element 11 is installed.
  • the heat radiating unit 20 is configured by, for example, a wave type self-excited vibration heat pipe 12 and a fin (for example, a wave type fin) 13 made of an aluminum alloy or the like.
  • the heat receiving member 10, the corrugated self-excited vibration heat pipe 12, and the corrugated fin 13 are fixed by brazing or the like.
  • FIG. 2 and 3 are diagrams showing an example of the flow path structure of the self-excited vibration heat pipe adopted as the embodiment of the present invention.
  • FIG. 4 is a view showing a cross-sectional structure of the self-excited vibration heat pipe shown in FIG. 2 or FIG. 3, for example, a cross section taken along the line AA of FIG.
  • the self-excited oscillating heat pipe 12 is, for example, arranged in parallel and in parallel, and is configured by a plurality of flow paths (FIG. 2) or meandering flow paths (FIG. 3) that are not connected to each other in each row.
  • a partition 2 is provided between the adjacent channels 1.
  • the flow channel diameter and the width of the partition (flow channel pitch) are each on the order of mm, and the flow channel length is sufficiently longer than the flow channel diameter.
  • the thickness of the self-excited vibration heat pipe 12 (FIG. 4) is set on the order of mm in terms of thermal conductivity and workability. Furthermore, when forming the self-excited vibration heat pipe into a corrugated shape, straight straight multi-hole flat tubes having the same length are arranged in parallel in the thickness direction without using a bending process for the multi-hole flat tubes. You may comprise by installing. That is, each end of the multi-hole flat tube installed in parallel in the multiple thickness direction, each end is fixed using a member such as an end sealing member having a slit on the multi-hole flat tube side, by this slit By alternately connecting the ends of the adjacent multi-hole flat tubes at both ends of the multi-hole flat tube, the hydraulic fluid can be moved. In this way, it is possible to form a self-excited vibration heat pipe having a closed flow path in which the flow path is formed in a rectangular wave shape (which is alternately folded back and extends along the longitudinal direction of the multi-hole flat tube).
  • FIG. 5 is a diagram showing an example of the heat resistance distribution of each heat receiving part calculated from the heat receiving part temperature and the outside air temperature of the self-excited vibration heat pipe cooler having the above-mentioned flow path structure and the input heat amount distribution to each heat receiving part. is there.
  • the cooling performance is near the longitudinal center of the heat pipe. Best, it tends to get worse as it approaches the edges.
  • the end heat receiving part has less freedom of operation of the hydraulic fluid than other heat receiving parts, and in the case of a meandering flow path, the turn part at the end of the flat pipe is It is considered that the hydraulic fluid is hard to operate because of the large flow resistance of. In such a case, a local temperature rise may occur in the heat receiving portion near the end of the cooler, which has poor performance, and may cause a failure when the heating element is a precision device. Therefore, the heat input to the heat receiving part is reduced from near the longitudinal center of the wave-type self-excited vibration heat pipe to the end to suppress the heat input to the heat receiving part with poor performance near the end of the flat tube in the longitudinal direction.
  • the temperature of the heat receiving part can be averaged by subscribing the amount to the heat receiving part near the center with good performance. With this, it is possible to suppress the local temperature rise and improve the performance of the entire cooler without changing the total input heat amount.
  • the distribution of the amount of input heat may be stepwise.
  • Example 1 shown in FIG. 1 when the corrugated self-excited vibration heat pipe 12 is installed on the surface of the heat receiving member 10 opposite to the surface on which the heating element 11 is arranged, the corrugated self-excited vibration heat pipe 12 is installed at the end portion of the corrugated self-excited vibration heat pipe.
  • One of the closest heat receiving parts 3 is arranged in the longitudinal direction of the heat pipe so as to be located outside the arrangement area of the heating element 11 projected on the opposite surface.
  • an adjacent heat receiving portion may be included as the heat receiving portion arranged outside the arrangement area of the heating element 11 projected on the opposite surface.
  • the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe is arranged outside the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged.
  • the amount of heat input to the heat receiving section near the end of the wave-type self-excited vibration heat pipe can be reduced, and the amount of heat input can be contracted to the heat-receiving section at the center of the wave self-excited vibration heat pipe.
  • a local temperature rise can be prevented and the performance of the entire self-excited vibration heat pipe cooler is improved.
  • the wave type self-excited vibration heat pipe 12 may be divided and arranged in the longitudinal direction of the heat pipe. However, since the end portion of the wave-type self-excited vibration heat pipe also exists near the center of the heat receiving member 10, this portion also has a heating element projected on the surface opposite to the surface on which the heating element 11 is arranged. It is necessary to place it outside the 11 area.
  • the working fluid sealed in the heat pipe for example, water, alcohols, hydrocarbons such as butane, hydrofluorocarbons, hydrofluoroethers, hydrofluoroolefins and perfluoroketones are used.
  • the loss caused by the operation of the heating element 11 is heat.
  • the heat generated from the heating element 11 is conducted to the corrugated self-excited vibration heat pipe 12 via the heat receiving member 10.
  • the hydraulic fluid enclosed in the hydraulic fluid flow path 1 bumps and a pressure rise occurs.
  • the hydraulic fluid vibrates in the flow path, and heat is conducted to the tip of the heat dissipation portion 20 of the wave type self-excited vibration heat pipe 12.
  • the corrugated fins 13 are attached to the heat dissipation part 20, heat is conducted from the self-excited vibration heat pipe 12 to the corrugated fins 13, and then the traveling wind 101 or 102 generated by traveling of the vehicle is corrugated, for example. By passing between the fins 13, heat is radiated from the surfaces of the corrugated fins 13 and the self-excited vibration heat pipe 12 to the air.
  • FIG. 6 shows the self-excited vibration heat pipe cooler according to the present invention. It is a figure which shows the structure at the time of installing the attached power converter device in the rail vehicle.
  • the electric power conversion device provided with the self-excited vibration heat pipe cooler according to the present invention is installed in a form of being fixed under a vehicle body floor of a railway vehicle (hereinafter abbreviated as a vehicle) 200 while being suspended.
  • the power conversion device includes a case (housing) that houses the heating element 11 (power semiconductor element) and the electric component 50, and changes the frequency of the power supplied to the electric motor (not shown) that drives the vehicle 200. Thus, the rotation speed of the electric motor is controlled.
  • FIG. 7 is a diagram showing the structure of the self-excited vibration heat pipe cooler according to the second embodiment of the present invention, from the sectional shape.
  • the same components as in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
  • the second embodiment is characterized in that the thickness of the heat receiving member 30 in the portion in contact with the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe is thinner than that in the heat receiving member 10 in contact with another heat receiving portion. ..
  • One or a plurality of heating elements 11 are arranged on the opposite surface of the heat receiving member 10 that is in contact with the self-excited vibration heat pipe except for the thin portion.
  • the region where the thickness is reduced may include a heat receiving portion and a heat radiating portion which are adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
  • the side of the heat receiving member 10 that is in contact with the wave type self-excited vibration heat pipe 12 is cut out, and the wave type self-excitation is provided in the area where the heating element 11 is projected on the opposite surface of the surface of the heat receiving member 10 where the heating element 11 is arranged.
  • the heat receiving part 3 closest to the end of the excited vibration heat pipe 12 may be arranged.
  • the thickness of the heat receiving member 10 may be reduced in a shape that is inclined with respect to the horizontal direction.
  • the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, and the thickness of the heat receiving member 10 is reduced in the heat receiving portion 3 closest to the end of each corrugated self excited vibration heat pipe 12. May be.
  • the heat is horizontally spread from the heat receiving member 10 in contact with the heating element 11 to the heat receiving member 30 in contact with the heat receiving unit 3 closest to the end of the wave-type self-excited vibration heat pipe 12. Suppress. As a result, by reducing the amount of heat input to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12, it is possible to suppress a local temperature rise and improve the cooling performance. ..
  • FIG. 8 is a diagram showing a cross-sectional shape of a self-excited vibration heat pipe cooler according to a third embodiment of the present invention.
  • the third embodiment is characterized in that the heat receiving member 10 has a notch 30 in a region that is closest to the end of the wave type self-excited vibration heat pipe 12 and does not include the heat receiving unit 3.
  • One or a plurality of heating elements 11 are arranged on the surface opposite to the surface of the heat receiving member 10 in contact with the self-excited vibration heat pipe. Since the thickness of the heat receiving member 10 is thin in most of the portions that are in contact with the heating element 11, the heat spread of the heat receiving member 10 in the horizontal direction can be suppressed.
  • the size of the notch 30 can be freely determined as long as the amount of heat input to the heat receiving part 3 closest to the end of the wave type self-excited vibration heat pipe 12 can be made smaller than that of the other heat receiving parts.
  • the cutout portion 30 may include a heat receiving portion and a heat radiating portion which are adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
  • the heat receiving member 10 may be cut out leaving an edge so that a brazing material or the like can be poured.
  • corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, and the heat receiving member is provided in a region including the heat receiving part other than the heat receiving part 3 closest to the end of each corrugated self excited vibration heat pipe 12. 10 may be cut out.
  • the amount of heat input to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is suppressed by suppressing the heat spread in the horizontal direction of the heat receiving member 10 in the portion in contact with the heating element 11. Can be made smaller. As a result, a local temperature rise can be suppressed and the cooling performance can be improved.
  • FIG. 9 is a diagram showing the structure of the self-excited vibration heat pipe cooler according to the fourth embodiment of the present invention, from the sectional shape thereof.
  • the fourth embodiment focuses on the fin structure and is characterized in that the number of fins between the heat radiating portions adjacent to the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe 12 is larger than that of the other heat radiating portions.
  • One or a plurality of heating elements 11 are arranged on the surface opposite to the surface of the heat receiving member 10 in contact with the self-excited vibration heat pipe.
  • the fin 13 may be attached only in the vicinity of the heat radiating portion adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
  • a plurality of corrugated self-excited vibration heat pipes 12 are arranged in the longitudinal direction of the heat receiving member 10, and the heat radiation part adjacent to the heat receiving part 3 closest to the end of each corrugated self excited vibration heat pipe 12 is disposed.
  • the number of fins 13 may be changed.
  • the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. ..
  • the structure of the fourth embodiment it is possible to increase the heat radiation area by increasing the heat radiation area in the heat radiation portion adjacent to the heat receiving portion 3 near the end of the corrugated self-excited vibration heat pipe 12. As a result, a local temperature rise can be suppressed and the cooling performance can be improved. Further, when the thickness of the heat receiving member 10 is restricted, it is possible to suppress a local temperature increase while maintaining the structure of the heat receiving member 10.
  • FIG. 10 is a diagram showing the structure of a self-excited vibration heat pipe cooler according to a fifth embodiment of the present invention, from the sectional shape.
  • the fifth embodiment is characterized in that the length of the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is made shorter than the other heat receiving portions. Since the length of the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is short, the heat flux can be reduced. Further, the length of the heat receiving portion may be gradually reduced from the central portion to the end portion of the corrugated self-excited vibration heat pipe 12.
  • the joint part of the two wave-type self-excited vibration heat pipes 12 is The fin 13 having the same size as that of the portion can be inserted, which eliminates the need to prepare another fin die for the joint portion, thereby reducing the cost.
  • the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. ..
  • the structure of the fifth embodiment by reducing the heat flux to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12, it is possible to suppress the local temperature rise and improve the cooling performance. Can be made. Further, when the thickness of the heat receiving member 10 is restricted, the input heat amount of the heat receiving unit 3 closest to the end of the wave-type self-excited vibration heat pipe 12 can be reduced while maintaining the structure of the heat receiving member 10. Furthermore, when a plurality of corrugated self-excited vibration heat pipes 12 are arranged, the length of the heat receiving portion 3 closest to the end of the corrugated self-excited vibration heat pipe 12 is short, which leads to space saving.
  • FIG. 11 is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 6 of this invention.
  • Example 6 is applied when cooling a plurality of heating elements having different heating values.
  • the heating elements 41 (T1 to T4) having a large heating value and the heating elements 42 (D1 and D2) having a small heating value are the surfaces of the heat receiving member 10 in contact with the self-excited vibration heat pipe. It is placed on the opposite side.
  • the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is projected onto the surface of the heat receiving member 10 opposite to the surface on which the heat generating elements 41 and 42 are arranged, and the heat generating element 42 having a small heat generation amount. It is characterized in that it is arranged in or near the arrangement area of (D1 and D2).
  • the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10
  • the division point 40 in the longitudinal direction is arranged in the arrangement area of the above-mentioned heating element 42 having a small heat generation amount.
  • FIG. 12 A circuit diagram of a three-level inverter is shown in FIG. 12 as a specific example of a heating element having a different heating value.
  • the three-level inverter includes four IGBTs (T1 to T4) arranged in series as heating elements 41 having a large heating value, and two clamping diodes (D1 and D2) connected in series as heating elements 42 having a small heating value.
  • T1 to T4 IGBTs
  • D1 and D2 clamping diodes
  • the heat receiving portion 3 which is arranged in the vicinity and is closest to the end of the wave type self-excited vibration heat pipe 12 on the side opposite to the dividing point 40 is projected on the surface opposite to the surface on which the heat generating elements 41 and 42 of the heat receiving member 10 are arranged. By disposing the heating elements 41 and 42 outside the disposition area, the amount of heat input to both ends can be reduced.
  • the clamp diodes 42 (D1 and D2) having a small amount of heat generation are arranged at the end of the heat receiving member 10,
  • the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heating element 42 projected on the surface opposite to the surface on which the heating element 42 of 10 is arranged.
  • the power semiconductor element 42 when cooling a plurality of power semiconductor elements having different heat generation amounts, the power semiconductor element 42 can be arranged in the area of the heat receiving member 10 corresponding to the end of the wave type self-excited vibration heat pipe 12. The cooling performance can be improved, and the space of the heat receiving member 10 can be saved.

Abstract

In order to solve the problem wherein cooling performance of a heat sink for self-oscillating heat pipe is best in the proximity of the center of the heat pipe in the longitudinal direction, and deteriorates towards the ends, this heat sink for self-oscillating heat pipe is constituted to comprise: a self-oscillating heat pipe having a structure wherein multi-holed flat pipes are connected in a rectangular wave shape in the thickness direction to form a wave shape, and said multi-holed flat pipes have an operating fluid sealed therein, thereby alternately positioning the heat-receiving portion and heat-dissipating portions; a heat-receiving member which is joined to the heat-receiving portion; and a heating element which is positioned on the surface opposite the joining surface of the heat-receiving member which joins with the heat-receiving member. The heat sink for self-oscillating heat pipe has the characteristic wherein by changing at least one of the configuration of the heat-receiving portion, the configuration of the heat-dissipating portion, the configuration of the heat-receiving member, or the configuration of the heating element, the distribution of heat input to the self-oscillating heat pipe via the heat-receiving portion becomes smaller from the proximity of the center of the multi-holed flat pipe towards the ends of said multi-holed flat pipe.

Description

自励振動ヒートパイプ冷却器Self-oscillating heat pipe cooler
　本発明は、自励振動ヒートパイプ冷却器に関し、特に、電気鉄道車両等が搭載する電力変換装置の冷却器として好適である。 The present invention relates to a self-excited vibration heat pipe cooler, and is particularly suitable as a cooler for a power conversion device mounted on an electric railway vehicle or the like.
　自励振動ヒートパイプは、ｍｍオーダーの一筆書き細径蛇行流路により構成され、表面張力により液柱と気柱とが交互に存在する状態で作動液が封入されている。複数の受熱部および放熱部を流路中に交互に設けると、受熱部における突沸による圧力上昇および放熱部における凝縮による圧力減少により、液柱と気柱とが自励的に振動し、熱の輸送を行う。
　また、自励振動ヒートパイプは、従来のヒートパイプとは異なり、重力による還流を必要としないため、設置姿勢に自由度があり、従来のヒートパイプに比べて小型にできるといった利点を持つ。 The self-excited vibration heat pipe is composed of a one-stroke, one-stroke, small-diameter, meandering flow path, and the working fluid is sealed in a state where liquid columns and air columns alternate due to surface tension. When a plurality of heat receiving parts and heat radiating parts are alternately provided in the flow path, the liquid column and the air column vibrate by self-excitation due to the pressure increase due to bumping in the heat receiving part and the pressure decrease due to condensation in the heat radiating part. Transport.
Further, unlike the conventional heat pipe, the self-excited vibration heat pipe does not require the circulation by gravity, and thus has a freedom in the installation posture and has an advantage that it can be made smaller than the conventional heat pipe.
　例えば、特許文献１には、複数のパワー半導体素子を受熱部材の一方側の面に配置し、受熱部材の他方側の反対面に自励振動ヒートパイプからなる放熱部を設置した構造を持つ自励振動ヒートパイプ冷却器が示されている。 For example, in Patent Document 1, a plurality of power semiconductor elements are arranged on one surface of a heat receiving member, and a heat radiating section including a self-excited vibration heat pipe is installed on the opposite surface of the heat receiving member on the other side. An excited oscillatory heat pipe cooler is shown.
特開２０１８－８８７４４号公報Japanese Patent Laid-Open No. 2018-88744
　本願に係る発明者は、自励振動ヒートパイプを、電気鉄道車両等が搭載する電力変換装置に用いられるパワー半導体素子向けの冷却器に適用することについて、鋭意検討した結果、次の知見を得るに至った。 The inventor of the present application has earnestly studied about applying the self-excited vibration heat pipe to a cooler for a power semiconductor element used in a power conversion device mounted on an electric railway vehicle or the like, and as a result, obtained the following findings. Came to.
　電気鉄道車両等が搭載する電力変換装置は、車両を駆動する電動機の制御用として車両の床下等に設置される。同様に、電力変換装置向けの冷却器も車両の床下に設置されるため、様々な環境下で冷却器として動作することが求められる。
　自励振動ヒートパイプは、流路に接する高温部と低温部の数が多い程、重力依存性が小さくなる傾向がある。そのため、特許文献１に示されるように、一筆書き蛇行流路構造が一般的に採用されている。
　一方で、飛来物による突発的な流路の破損などに対して高信頼性であることが重要視される。この場合には、自励振動ヒートパイプの構造として、流路同士に連通のない流路構造にすることも考えられる。 An electric power conversion device mounted on an electric railway vehicle or the like is installed under a floor of a vehicle for controlling an electric motor that drives the vehicle. Similarly, since the cooler for the power converter is also installed under the floor of the vehicle, it is required to operate as the cooler in various environments.
The self-excited vibration heat pipe tends to have less gravity dependency as the number of high-temperature parts and low-temperature parts in contact with the flow path increases. Therefore, as shown in Patent Document 1, a one-stroke writing meandering flow path structure is generally adopted.
On the other hand, it is important to have high reliability against accidental breakage of the flow path due to flying objects. In this case, as the structure of the self-excited vibration heat pipe, it may be considered to have a flow channel structure in which the flow channels do not communicate with each other.
　自励振動ヒートパイプ冷却器は、製作性の良さから、例えば、密閉された多穴扁平管を波型に複数回曲げて、受熱部および放熱部を交互に往復するように成形し、受熱部には受熱部材を接合してその反対面には発熱体を配置した構造が考えられる。 The self-excited vibration heat pipe cooler has, for example, good manufacturability. A structure in which a heat receiving member is joined and a heating element is arranged on the opposite surface is conceivable.
　しかしながら、上記した構造の自励振動ヒートパイプ冷却器が一筆書き蛇行流路構造または連通のない流路構造を持つ場合には、自励振動ヒートパイプの受熱部における性能としては、ヒートパイプの長手方向の中心付近で最も良好で、端部に近づくにつれて悪化する傾向がある。このため、冷却器の端部で局所的な温度上昇が発生しやすくなり、冷却対象が精密機器の場合には故障の原因となる可能性がある。 However, when the self-excited vibration heat pipe cooler having the above-mentioned structure has a one-stroke meandering flow path structure or a flow path structure without communication, the performance in the heat receiving part of the self-excited vibration heat pipe is as follows: Best near the center of the direction, and tends to worsen as it approaches the edges. For this reason, a local temperature rise is likely to occur at the end of the cooler, which may cause a failure when the cooling target is a precision device.
　本発明の目的は、自励振動ヒートパイプ冷却器が密閉された多穴扁平管を波型に形成して構成される場合の冷却性能を向上させることである。 The object of the present invention is to improve the cooling performance when the self-excited vibration heat pipe cooler is formed by forming a sealed multi-hole flat tube in a corrugated shape.
　本発明に係る自励振動ヒートパイプ冷却器は、多穴扁平管を厚み方向に矩形波状に連通して波型形状に形成すると共に当該多穴扁平管は作動液が封入され密閉されることで受熱部と放熱部とが交互に配置される構造を有する自励振動ヒートパイプと、受熱部と接合する受熱部材と、受熱部と接合する受熱部材の接合面と反対側の面に配置される発熱体とを備え、受熱部の構成、放熱部の構成、受熱部材の構成および発熱体の構成の内少なくともいずれか一つを変更することで、受熱部を介して自励振動ヒートパイプに入力される熱量の分布が、多穴扁平管の長手方向の中心付近から当該多穴扁平管の端部にかけて小さくなる特性を有することを特徴とする。 The self-excited vibration heat pipe cooler according to the present invention forms a corrugated shape by communicating a multi-hole flat tube in a rectangular wave shape in the thickness direction, and the multi-hole flat tube is sealed with a working fluid sealed therein. The self-excited vibration heat pipe having a structure in which the heat receiving portion and the heat radiating portion are alternately arranged, the heat receiving member joined to the heat receiving portion, and the heat receiving member joined to the heat receiving portion are arranged on the surface opposite to the joint surface. A heating element is provided, and at least one of the configuration of the heat receiving section, the configuration of the heat radiating section, the configuration of the heat receiving member, and the configuration of the heating element is changed to input to the self-excited vibration heat pipe via the heat receiving section. It is characterized in that the distribution of the amount of heat generated has a characteristic of becoming smaller from the vicinity of the center in the longitudinal direction of the multi-hole flat tube to the end portion of the multi-hole flat tube.
　本発明によれば、受熱部への入力熱量を多穴扁平管の長手方向中心付近から端部にかけて小さくして、扁平管長手方向の端部付近で性能が悪い受熱部への入力熱量を抑制し、その分を性能の良い中心付近の受熱部に請け負わせることにより、総発熱量は変えずに、局所的な温度上昇を抑制し、冷却器全体の性能が向上する。
　上記した以外の課題、構成および効果については、以下の実施形態の説明により明らかにされる。 According to the present invention, the amount of heat input to the heat receiving part is reduced from near the center in the longitudinal direction of the multi-hole flat tube to the end, and the amount of heat input to the heat receiving part having poor performance near the end in the flat tube longitudinal direction is suppressed. However, by subcontracting that amount to the heat receiving portion near the center with good performance, the local temperature rise is suppressed without changing the total heat generation amount, and the performance of the entire cooler is improved.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.
本発明の実施例１に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 1 of this invention. 本発明の実施形態として採用する自励振動ヒートパイプ冷却器の流路構造の一例を示す図である。It is a figure which shows an example of the flow path structure of the self-excited vibration heat pipe cooler employ|adopted as embodiment of this invention. 本発明の実施形態として採用する自励振動ヒートパイプ冷却器の流路構造の一例を示す図である。It is a figure which shows an example of the flow path structure of the self-excited vibration heat pipe cooler employ|adopted as embodiment of this invention. 本発明の実施形態として採用する自励振動ヒートパイプ冷却器の断面構造を示す図である。It is a figure which shows the cross-section of the self-excited vibration heat pipe cooler employ|adopted as embodiment of this invention. 自励振動ヒートパイプ冷却器の各受熱部の熱抵抗分布および入力熱量分布の一例を示す図である。It is a figure which shows an example of the thermal resistance distribution and input heat amount distribution of each heat receiving part of a self-excited vibration heat pipe cooler. 本発明に係る自励振動ヒートパイプ冷却器を併設した電力変換装置が鉄道車両に搭載された場合の構造を示す図である。It is a figure which shows the structure at the time of mounting the electric power converter device which put together the self-excited vibration heat pipe cooler which concerns on this invention in a railroad vehicle. 本発明の実施例２に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 2 of this invention. 本発明の実施例３に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 3 of this invention. 本発明の実施例４に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 4 of this invention. 本発明の実施例５に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 5 of this invention. 本発明の実施例６に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。It is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 6 of this invention. 発熱量の異なる発熱体の具体例として示す３レベルインバータの回路図である。It is a circuit diagram of a three-level inverter shown as a specific example of a heating element having a different heating value.
　以下、本発明を実施するための形態として、実施例１から実施例６について図面を用いて説明する。 Embodiments 1 to 6 will be described below with reference to the drawings as modes for carrying out the present invention.
　図１は、本発明の実施例１に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。自励振動ヒートパイプ冷却器は、受熱部材１０と放熱部２０（波型自励振動ヒートパイプ１２および波型フィン１３）とを有する。 FIG. 1 is a diagram showing a structure of a self-excited vibration heat pipe cooler according to a first embodiment of the present invention from a sectional shape. The self-excited oscillating heat pipe cooler includes a heat receiving member 10 and a heat radiating portion 20 (the wave-shaped self-excited oscillating heat pipe 12 and the wave-shaped fin 13 ).
　以下、発熱体１１を含めて各構成要素について説明する。 Each component including the heating element 11 will be described below.
　受熱部材１０は、例えば、アルミニウム合金、鉄、銅等の金属から成る。
　受熱部材１０の上側には、複数のＩＧＢＴ（Ｉｎｓｕｌａｔｅｄ　Ｇａｔｅ　Ｂｉｐｏｌａｒ　Ｔｒａｎｓｉｓｔｏｒ）または複数のＭＯＳＦＥＴ（Ｍｅｔａｌ－Ｏｘｉｄｅ－Ｓｅｍｉｃｏｎｄｕｃｔｏｒ　Ｆｉｅｌｄ－Ｅｆｆｅｃｔ　Ｔｒａｎｓｉｓｔｏｒ）等のパワー半導体素子を含む発熱体１１が、一つまたは複数設置されている。 The heat receiving member 10 is made of, for example, a metal such as an aluminum alloy, iron, or copper.
One or more heating elements 11 including a power semiconductor element such as a plurality of IGBTs (Insulated Gate Bipolar Transistors) or a plurality of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) are installed on the upper side of the heat receiving member 10. ing.
　一つまたは複数の発熱体１１は、例えば、上述のパワー半導体素子から構成される電力変換装置であって、グリース等の部材（図示せず）を介してねじ等（図示せず）によって受熱部材１０の一面（図１では上面）に固定される。 The one or more heating elements 11 are, for example, a power conversion device including the power semiconductor element described above, and a heat receiving member by a screw (not shown) via a member (not shown) such as grease. It is fixed to one surface of 10 (the upper surface in FIG. 1).
　受熱部材１０における発熱体１１の設置面の反対側の面（図１では下面）には、放熱部２０が設けられる。 A heat radiating section 20 is provided on the surface (lower surface in FIG. 1) of the heat receiving member 10 opposite to the surface on which the heating element 11 is installed.
　放熱部２０は、例えば、波型自励振動ヒートパイプ１２およびアルミニウム合金等から成るフィン（例えば、波型フィン）１３により構成される。 The heat radiating unit 20 is configured by, for example, a wave type self-excited vibration heat pipe 12 and a fin (for example, a wave type fin) 13 made of an aluminum alloy or the like.
　受熱部材１０、波型自励振動ヒートパイプ１２および波型フィン１３それぞれは、ロウ付け等によって固定される。 The heat receiving member 10, the corrugated self-excited vibration heat pipe 12, and the corrugated fin 13 are fixed by brazing or the like.
　図２および図３は、本発明の実施形態として採用する自励振動ヒートパイプの流路構造の一例を示す図である。また、図４は、図２または図３に示す自励振動ヒートパイプの断面構造として、例えば図２のＡ－Ａ断面を示す図である。
　自励振動ヒートパイプ１２は、例えば、平行並列に整列し、各列で相互に連通のない複数の流路（図２）または蛇行流路（図３）により構成されている。隣り合う流路１の間には、仕切り部２が設けられている。流路径および仕切り部の幅（流路間ピッチ）は、それぞれｍｍオーダーであり、流路長は流路径に比べて十分に長い。
　また、自励振動ヒートパイプ１２の厚み（図４）は、熱伝導性や加工容易性からｍｍオーダー程度に設定される。
　更に、自励振動ヒートパイプを波型に形成するに当たっては、多穴扁平管に対して曲げ工程を用いることなく、同じ長さを持つストレート形状の多穴扁平管を複数本厚み方向に並列に設置することによって構成してもよい。すなわち、複数本厚み方向に並列に設置した多穴扁平管の両端部それぞれを、多穴扁平管側にスリットを備えた端部封止部材のような部材を使用して固定し、このスリットにより多穴扁平管の両端それぞれにおいて隣接する多穴扁平管の端部同士を交互に連通させることにより、作動液の移動を可能にする。このようにして、流路が矩形波状に形成される（多穴扁平管の長手方向に沿って交互に折り返して延在する）密閉流路を持つ自励振動ヒートパイプを形成することができる。 2 and 3 are diagrams showing an example of the flow path structure of the self-excited vibration heat pipe adopted as the embodiment of the present invention. FIG. 4 is a view showing a cross-sectional structure of the self-excited vibration heat pipe shown in FIG. 2 or FIG. 3, for example, a cross section taken along the line AA of FIG.
The self-excited oscillating heat pipe 12 is, for example, arranged in parallel and in parallel, and is configured by a plurality of flow paths (FIG. 2) or meandering flow paths (FIG. 3) that are not connected to each other in each row. A partition 2 is provided between the adjacent channels 1. The flow channel diameter and the width of the partition (flow channel pitch) are each on the order of mm, and the flow channel length is sufficiently longer than the flow channel diameter.
Further, the thickness of the self-excited vibration heat pipe 12 (FIG. 4) is set on the order of mm in terms of thermal conductivity and workability.
Furthermore, when forming the self-excited vibration heat pipe into a corrugated shape, straight straight multi-hole flat tubes having the same length are arranged in parallel in the thickness direction without using a bending process for the multi-hole flat tubes. You may comprise by installing. That is, each end of the multi-hole flat tube installed in parallel in the multiple thickness direction, each end is fixed using a member such as an end sealing member having a slit on the multi-hole flat tube side, by this slit By alternately connecting the ends of the adjacent multi-hole flat tubes at both ends of the multi-hole flat tube, the hydraulic fluid can be moved. In this way, it is possible to form a self-excited vibration heat pipe having a closed flow path in which the flow path is formed in a rectangular wave shape (which is alternately folded back and extends along the longitudinal direction of the multi-hole flat tube).
　図５は、上記した流路構造を持つ自励振動ヒートパイプ冷却器の受熱部温度および外気温度から算出した各受熱部の熱抵抗分布並びに各受熱部への入力熱量分布の一例を示す図である。
　例えば、一筆書き蛇行流路構造または連通のない流路構造を持つ自励振動ヒートパイプ冷却器の各受熱部に同等の入力熱量を与えた場合、冷却性能は、ヒートパイプの長手方向中心付近で最もよく、端部に近づくにつれて悪化する傾向がある。
　この原因としては、連通のない流路の場合、端部受熱部は作動液動作の自由度が他の受熱部に比べて少ない点、また、蛇行流路の場合、扁平管端部におけるターン部の流動抵抗が大きいため、作動液が動作しづらい点が考えられる。
　このような場合に、冷却器端部付近の性能が悪い受熱部において、局所的な温度上昇が起こる可能性があり、発熱体が精密機器である場合には故障を招く可能性がある。
　そこで、受熱部への入力熱量を、波型自励振動ヒートパイプの長手方向中心付近から端部にかけて小さくして、扁平管長手方向の端部付近の性能が悪い受熱部への入力熱量を抑制し、その分を性能が良好な中心付近の受熱部に請け負わせることにより、受熱部の温度を平均化できる。
　これによって、総入力熱量を変えないまま、局所的な温度上昇を抑制し、冷却器全体の性能を向上できる。
　ここで、入力熱量の分布はステップ状でもよい。 FIG. 5 is a diagram showing an example of the heat resistance distribution of each heat receiving part calculated from the heat receiving part temperature and the outside air temperature of the self-excited vibration heat pipe cooler having the above-mentioned flow path structure and the input heat amount distribution to each heat receiving part. is there.
For example, if the same input heat quantity is given to each heat receiving part of the self-excited vibration heat pipe cooler having a one-stroke writing meandering flow path structure or a flow path structure without communication, the cooling performance is near the longitudinal center of the heat pipe. Best, it tends to get worse as it approaches the edges.
The reason for this is that in the case of a flow path without communication, the end heat receiving part has less freedom of operation of the hydraulic fluid than other heat receiving parts, and in the case of a meandering flow path, the turn part at the end of the flat pipe is It is considered that the hydraulic fluid is hard to operate because of the large flow resistance of.
In such a case, a local temperature rise may occur in the heat receiving portion near the end of the cooler, which has poor performance, and may cause a failure when the heating element is a precision device.
Therefore, the heat input to the heat receiving part is reduced from near the longitudinal center of the wave-type self-excited vibration heat pipe to the end to suppress the heat input to the heat receiving part with poor performance near the end of the flat tube in the longitudinal direction. However, the temperature of the heat receiving part can be averaged by subscribing the amount to the heat receiving part near the center with good performance.
With this, it is possible to suppress the local temperature rise and improve the performance of the entire cooler without changing the total input heat amount.
Here, the distribution of the amount of input heat may be stepwise.
　図１に示す実施例１では、波型自励振動ヒートパイプ１２を、受熱部材１０の発熱体１１を配置した面の反対面に設置する際に、波型自励振動ヒートパイプの端部に最も近い受熱部３が、この反対面に投影した発熱体１１の配置エリア外に位置するように、ヒートパイプの長手方向に一つ配置している。ここで、この反対面に投影した発熱体１１の配置エリア外に配置する受熱部として、隣接する受熱部を含めてもよい。 In Example 1 shown in FIG. 1, when the corrugated self-excited vibration heat pipe 12 is installed on the surface of the heat receiving member 10 opposite to the surface on which the heating element 11 is arranged, the corrugated self-excited vibration heat pipe 12 is installed at the end portion of the corrugated self-excited vibration heat pipe. One of the closest heat receiving parts 3 is arranged in the longitudinal direction of the heat pipe so as to be located outside the arrangement area of the heating element 11 projected on the opposite surface. Here, an adjacent heat receiving portion may be included as the heat receiving portion arranged outside the arrangement area of the heating element 11 projected on the opposite surface.
　このように、受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア外に、波型自励振動ヒートパイプの端部に最も近い受熱部３を配置することで、波型自励振動ヒートパイプの端部付近の受熱部への入力熱量を小さくし、その分を波型自励振動ヒートパイプの中央部の受熱部へ請け負わせることができる。これにより、局所的な温度上昇を防ぐことができ、自励振動ヒートパイプ冷却器全体の性能が向上する。 In this way, the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe is arranged outside the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. Thus, the amount of heat input to the heat receiving section near the end of the wave-type self-excited vibration heat pipe can be reduced, and the amount of heat input can be contracted to the heat-receiving section at the center of the wave self-excited vibration heat pipe. As a result, a local temperature rise can be prevented and the performance of the entire self-excited vibration heat pipe cooler is improved.
　ここで、波型自励振動ヒートパイプ１２は、ヒートパイプの長手方向に分割して配置してもよい。ただし、受熱部材１０の中央付近にも波型自励振動ヒートパイプの端部が存在することになるため、この部分も受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア外に配置する必要がある。 Here, the wave type self-excited vibration heat pipe 12 may be divided and arranged in the longitudinal direction of the heat pipe. However, since the end portion of the wave-type self-excited vibration heat pipe also exists near the center of the heat receiving member 10, this portion also has a heating element projected on the surface opposite to the surface on which the heating element 11 is arranged. It is necessary to place it outside the 11 area.
　なお、ヒートパイプに封入する作動液としては、例えば、水、アルコール類、ブタン等の炭化水素類、ハイドロフルオロカーボン類、ハイドロフルオロエーテル類、ハイドロフルオロオレフィン類およびパーフルオロケトン類等が使われる。 Note that as the working fluid sealed in the heat pipe, for example, water, alcohols, hydrocarbons such as butane, hydrofluorocarbons, hydrofluoroethers, hydrofluoroolefins and perfluoroketones are used.
　次に、実施例１における冷却器の動作態様について説明する。
　発熱体１１が動作することによって生じる損失は、熱となる。発熱体１１から生じた熱は、受熱部材１０を経て波型自励振動ヒートパイプ１２に伝導する。
　波型自励振動ヒートパイプ１２のうち、受熱部材１０と接触している複数箇所の受熱部で、作動液流路１に封入された作動液が突沸して圧力上昇を起こす。それにより、作動液が流路内で振動し、熱は波型自励振動ヒートパイプ１２の放熱部２０の先端へと伝導する。
　さらに、放熱部２０に波型フィン１３が取り付けられている場合、自励振動ヒートパイプ１２から波型フィン１３に熱が伝導し、次いで、例えば、車両走行により生じる走行風１０１または１０２が波型フィン１３の間を通過することにより、波型フィン１３および自励振動ヒートパイプ１２の表面から空気へと放熱される。 Next, an operation mode of the cooler in the first embodiment will be described.
The loss caused by the operation of the heating element 11 is heat. The heat generated from the heating element 11 is conducted to the corrugated self-excited vibration heat pipe 12 via the heat receiving member 10.
In the corrugated self-excited vibration heat pipe 12, at a plurality of heat receiving portions in contact with the heat receiving member 10, the hydraulic fluid enclosed in the hydraulic fluid flow path 1 bumps and a pressure rise occurs. As a result, the hydraulic fluid vibrates in the flow path, and heat is conducted to the tip of the heat dissipation portion 20 of the wave type self-excited vibration heat pipe 12.
Furthermore, when the corrugated fins 13 are attached to the heat dissipation part 20, heat is conducted from the self-excited vibration heat pipe 12 to the corrugated fins 13, and then the traveling wind 101 or 102 generated by traveling of the vehicle is corrugated, for example. By passing between the fins 13, heat is radiated from the surfaces of the corrugated fins 13 and the self-excited vibration heat pipe 12 to the air.
　次に、本発明に係る自励振動ヒートパイプ冷却器を、鉄道車両などの輸送機器の電力変換装置に適用する場合の一例として、図６は、本発明に係る自励振動ヒートパイプ冷却器を併設した電力変換装置が鉄道車両に搭載された場合の構造を示す図である。 Next, as an example of applying the self-excited vibration heat pipe cooler according to the present invention to a power conversion device for transportation equipment such as a railroad vehicle, FIG. 6 shows the self-excited vibration heat pipe cooler according to the present invention. It is a figure which shows the structure at the time of installing the attached power converter device in the rail vehicle.
　本発明に係る自励振動ヒートパイプ冷却器を併設した電力変換装置は、鉄道車両（以下、車両と略する）２００の車体床下に吊り下げられた状態で固定される形態で設置される。ここで、電力変換装置は、発熱体１１（パワー半導体素子）および電気部品５０を収納したケース（筐体）を備え、車両２００を駆動する電動機（図示せず）に供給する電力の周波数を変えることにより、電動機の回転速度を制御する。 The electric power conversion device provided with the self-excited vibration heat pipe cooler according to the present invention is installed in a form of being fixed under a vehicle body floor of a railway vehicle (hereinafter abbreviated as a vehicle) 200 while being suspended. Here, the power conversion device includes a case (housing) that houses the heating element 11 (power semiconductor element) and the electric component 50, and changes the frequency of the power supplied to the electric motor (not shown) that drives the vehicle 200. Thus, the rotation speed of the electric motor is controlled.
　以上のとおり、実施例１の構造により、自励振動ヒートパイプ冷却器における局所的な温度上昇を抑制することができ、冷却性能を向上させることができる。 As described above, with the structure of the first embodiment, it is possible to suppress the local temperature rise in the self-excited vibration heat pipe cooler and improve the cooling performance.
　図７は、本発明の実施例２に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。なお、実施例２以降の構造を示す各図面において、実施例１と同じ構成要素は同じ番号で表記し、その説明については省略する。 FIG. 7 is a diagram showing the structure of the self-excited vibration heat pipe cooler according to the second embodiment of the present invention, from the sectional shape. In each of the drawings showing the structure of the second and subsequent embodiments, the same components as in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
　実施例２は、波型自励振動ヒートパイプの端部に最も近い受熱部３と接する部分の受熱部材３０の厚みが、他の受熱部と接する受熱部材１０に比べて薄いことを特徴とする。一つまたは複数の発熱体１１は、厚みの薄い部分を除く受熱部材１０の自励振動ヒートパイプと接する反対面に配置される。 The second embodiment is characterized in that the thickness of the heat receiving member 30 in the portion in contact with the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe is thinner than that in the heat receiving member 10 in contact with another heat receiving portion. .. One or a plurality of heating elements 11 are arranged on the opposite surface of the heat receiving member 10 that is in contact with the self-excited vibration heat pipe except for the thin portion.
　受熱部材３０にあって波型自励振動ヒートパイプ１２の端部に最も近い受熱部３と接する部分の厚みが薄いため、他の受熱部と接する受熱部材１０から水平方向への熱広がりを抑制できる。これにより、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を小さくすることができる。
　厚みを薄くする領域としては、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３と隣接する受熱部および放熱部を含んでもよい。また、受熱部材１０の波型自励振動ヒートパイプ１２と接する側を切り欠き、受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア内に、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を配置してもよい。
　また、受熱部材１０の水平方向に対して傾斜をつける形状で厚みを薄くしてもよい。
　さらに、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向に分割し、それぞれの波型自励振動ヒートパイプ１２の端部に最も近い受熱部３において、受熱部材１０の厚みを薄くしてもよい。 Since the thickness of the portion of the heat receiving member 30 that is in contact with the heat receiving portion 3 that is closest to the end of the corrugated self-excited vibration heat pipe 12 is thin, the heat spread in the horizontal direction from the heat receiving member 10 that is in contact with another heat receiving portion is suppressed. it can. This makes it possible to reduce the amount of heat input to the heat receiving section 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
The region where the thickness is reduced may include a heat receiving portion and a heat radiating portion which are adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12. In addition, the side of the heat receiving member 10 that is in contact with the wave type self-excited vibration heat pipe 12 is cut out, and the wave type self-excitation is provided in the area where the heating element 11 is projected on the opposite surface of the surface of the heat receiving member 10 where the heating element 11 is arranged. The heat receiving part 3 closest to the end of the excited vibration heat pipe 12 may be arranged.
Further, the thickness of the heat receiving member 10 may be reduced in a shape that is inclined with respect to the horizontal direction.
Further, the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, and the thickness of the heat receiving member 10 is reduced in the heat receiving portion 3 closest to the end of each corrugated self excited vibration heat pipe 12. May be.
　以上のとおり、実施例２の構造により、発熱体１１と接する受熱部材１０から、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３と接する受熱部材３０への水平方向の熱広がりを抑制する。これにより、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を小さくすることで、局所的な温度上昇を抑制することができ、冷却性能を向上させることができる。 As described above, according to the structure of the second embodiment, the heat is horizontally spread from the heat receiving member 10 in contact with the heating element 11 to the heat receiving member 30 in contact with the heat receiving unit 3 closest to the end of the wave-type self-excited vibration heat pipe 12. Suppress. As a result, by reducing the amount of heat input to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12, it is possible to suppress a local temperature rise and improve the cooling performance. ..
　図８は、本発明の実施例３に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。
　実施例３は、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を含まない領域において受熱部材１０が切欠き部３０を有する構造としたことを特徴とする。一つまたは複数の発熱体１１は、自励振動ヒートパイプが接する受熱部材１０の面と反対の面に配置される。
　発熱体１１と接する大部分において受熱部材１０の厚みが薄いため、受熱部材１０の水平方向への熱広がりを抑制できる。これにより、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を小さくすることができる。
　また、受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア内に、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３が存在する場合でも、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３と接する部分の受熱部材３１の厚みが厚いため、水平方向への熱広がりを促進する。これにより、垂直方向への熱伝導を抑制し、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を小さくすることができる。 FIG. 8 is a diagram showing a cross-sectional shape of a self-excited vibration heat pipe cooler according to a third embodiment of the present invention.
The third embodiment is characterized in that the heat receiving member 10 has a notch 30 in a region that is closest to the end of the wave type self-excited vibration heat pipe 12 and does not include the heat receiving unit 3. One or a plurality of heating elements 11 are arranged on the surface opposite to the surface of the heat receiving member 10 in contact with the self-excited vibration heat pipe.
Since the thickness of the heat receiving member 10 is thin in most of the portions that are in contact with the heating element 11, the heat spread of the heat receiving member 10 in the horizontal direction can be suppressed. This makes it possible to reduce the amount of heat input to the heat receiving section 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
Further, even when the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 exists in the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. Since the thickness of the heat receiving member 31 at the portion in contact with the heat receiving portion 3 closest to the end of the corrugated self-excited vibration heat pipe 12 is large, the heat spread in the horizontal direction is promoted. As a result, it is possible to suppress heat conduction in the vertical direction and reduce the amount of heat input to the heat receiving section 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
　切欠き部３０の大きさとしては、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を他の受熱部よりも小さくできるならば、自由に決めることができる。また、切欠き部３０に、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３と隣接する受熱部および放熱部を含ませてもよい。
　さらに、ロウ材などを流し込めるように受熱部材１０の縁を残して切り欠いてもよい。
　また、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向で分割し、それぞれの波型自励振動ヒートパイプ１２の端部に最も近い受熱部３以外の受熱部を含む領域において受熱部材１０を切り欠いてもよい。 The size of the notch 30 can be freely determined as long as the amount of heat input to the heat receiving part 3 closest to the end of the wave type self-excited vibration heat pipe 12 can be made smaller than that of the other heat receiving parts. Further, the cutout portion 30 may include a heat receiving portion and a heat radiating portion which are adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
Further, the heat receiving member 10 may be cut out leaving an edge so that a brazing material or the like can be poured.
In addition, the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, and the heat receiving member is provided in a region including the heat receiving part other than the heat receiving part 3 closest to the end of each corrugated self excited vibration heat pipe 12. 10 may be cut out.
　実施例３の構造により、発熱体１１と接する部分の受熱部材１０の水平方向への熱広がりを抑制して、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への入力熱量を小さくすることできる。これにより、局所的な温度上昇を抑制することができ、冷却性能を向上させることができる。 With the structure of the third embodiment, the amount of heat input to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is suppressed by suppressing the heat spread in the horizontal direction of the heat receiving member 10 in the portion in contact with the heating element 11. Can be made smaller. As a result, a local temperature rise can be suppressed and the cooling performance can be improved.
　図９は、本発明の実施例４に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。
　実施例４は、フィン構造に着目し、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３に隣接する放熱部間のフィン枚数が他の放熱部に比べて多いことを特徴とする。一つまたは複数の発熱体１１は、自励振動ヒートパイプが接する受熱部材１０の面と反対の面に配置される。
　波型自励振動ヒートパイプ１２の端部に最も近い受熱部３に隣接する放熱部付近にのみフィン１３を取り付ける構造であってもよい。
　また、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向に複数個配置し、それぞれの波型自励振動ヒートパイプ１２の端部に最も近い受熱部３に隣接する放熱部に対して、フィン１３の枚数を変更してもよい。
　さらに、受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア内に波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を配置してもよい。 FIG. 9 is a diagram showing the structure of the self-excited vibration heat pipe cooler according to the fourth embodiment of the present invention, from the sectional shape thereof.
The fourth embodiment focuses on the fin structure and is characterized in that the number of fins between the heat radiating portions adjacent to the heat receiving portion 3 closest to the end of the wave type self-excited vibration heat pipe 12 is larger than that of the other heat radiating portions. To do. One or a plurality of heating elements 11 are arranged on the surface opposite to the surface of the heat receiving member 10 in contact with the self-excited vibration heat pipe.
The fin 13 may be attached only in the vicinity of the heat radiating portion adjacent to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12.
Further, a plurality of corrugated self-excited vibration heat pipes 12 are arranged in the longitudinal direction of the heat receiving member 10, and the heat radiation part adjacent to the heat receiving part 3 closest to the end of each corrugated self excited vibration heat pipe 12 is disposed. The number of fins 13 may be changed.
Further, the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. ..
　実施例４の構造により、波型自励振動ヒートパイプ１２の端部に近い受熱部３に隣接する放熱部における放熱面積を拡大し、放熱量を大きくすることできる。これにより、局所的な温度上昇を抑制することができ、冷却性能を向上させることができる。また、受熱部材１０の厚みに制約がある場合に、受熱部材１０の構造を保ったまま、局所的な温度上昇を抑制することができる。 With the structure of the fourth embodiment, it is possible to increase the heat radiation area by increasing the heat radiation area in the heat radiation portion adjacent to the heat receiving portion 3 near the end of the corrugated self-excited vibration heat pipe 12. As a result, a local temperature rise can be suppressed and the cooling performance can be improved. Further, when the thickness of the heat receiving member 10 is restricted, it is possible to suppress a local temperature increase while maintaining the structure of the heat receiving member 10.
　図１０は、本発明の実施例５に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。
　実施例５は、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の長さを他の受熱部よりも短くすることを特徴とする。波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の長さが短いことにより、熱流束を小さくできる。
　また、波型自励振動ヒートパイプ１２の中央部から端部にかけて、徐々に受熱部の長さを短くしてもよい。
　さらに、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向に複数個配置し、それぞれの波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の長さを短くしてもよい。例えば、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の長さを他の受熱部の半分とすれば、２つの波型自励振動ヒートパイプ１２同士の接合部に、他の部分と同じサイズのフィン１３を挿入することができる、これにより、接合部用に別のフィン金型を用意する必要がなく、コストを削減できる。
　また、受熱部材１０の発熱体１１を配置した面の反対面に投影した発熱体１１の配置エリア内に波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を配置してもよい。 FIG. 10 is a diagram showing the structure of a self-excited vibration heat pipe cooler according to a fifth embodiment of the present invention, from the sectional shape.
The fifth embodiment is characterized in that the length of the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is made shorter than the other heat receiving portions. Since the length of the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is short, the heat flux can be reduced.
Further, the length of the heat receiving portion may be gradually reduced from the central portion to the end portion of the corrugated self-excited vibration heat pipe 12.
Furthermore, even if a plurality of corrugated self-excited vibration heat pipes 12 are arranged in the longitudinal direction of the heat receiving member 10 and the length of the heat receiving part 3 closest to the end of each corrugated self excited vibration heat pipe 12 is shortened. Good. For example, if the length of the heat receiving part 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is set to half of the other heat-receiving parts, the joint part of the two wave-type self-excited vibration heat pipes 12 is The fin 13 having the same size as that of the portion can be inserted, which eliminates the need to prepare another fin die for the joint portion, thereby reducing the cost.
Further, the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heat generating element 11 projected on the surface opposite to the surface of the heat receiving member 10 on which the heat generating element 11 is arranged. ..
　実施例５の構造により、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３への熱流束を小さくすることで、局所的な温度上昇を抑制することができ、冷却性能を向上させることができる。
　また、受熱部材１０の厚みに制約がある場合に、受熱部材１０の構造を保ったまま、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の入力熱量を小さくできる。さらに、波型自励振動ヒートパイプ１２を複数個配置する際に、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３の長さが短いため、スペースの節約にもつながる。 With the structure of the fifth embodiment, by reducing the heat flux to the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12, it is possible to suppress the local temperature rise and improve the cooling performance. Can be made.
Further, when the thickness of the heat receiving member 10 is restricted, the input heat amount of the heat receiving unit 3 closest to the end of the wave-type self-excited vibration heat pipe 12 can be reduced while maintaining the structure of the heat receiving member 10. Furthermore, when a plurality of corrugated self-excited vibration heat pipes 12 are arranged, the length of the heat receiving portion 3 closest to the end of the corrugated self-excited vibration heat pipe 12 is short, which leads to space saving.
　図１１は、本発明の実施例６に係る自励振動ヒートパイプ冷却器の断面形状からその構造を示す図である。
　実施例６は、複数の発熱量の異なる発熱体を冷却する場合に適用するものである。ここで、発熱量の異なる発熱体として、発熱量の大きい発熱体４１（Ｔ１～Ｔ４）および発熱量の小さい発熱体４２（Ｄ１およびＤ２）は、自励振動ヒートパイプが接する受熱部材１０の面と反対の面に配置される。
　実施例６は、波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を、受熱部材１０の発熱体４１および４２を配置した面の反対面に投影した発熱量の小さな発熱体４２（Ｄ１およびＤ２）の配置エリア内またはその付近に配置することを特徴とする。
　また、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向に分割する場合は、その長手方向の分割点４０を上記した発熱量の小さな発熱体４２の配置エリア内に配置する。 FIG. 11: is a figure which shows the structure from the cross-sectional shape of the self-excited vibration heat pipe cooler which concerns on Example 6 of this invention.
Example 6 is applied when cooling a plurality of heating elements having different heating values. Here, as the heating elements having different heating values, the heating elements 41 (T1 to T4) having a large heating value and the heating elements 42 (D1 and D2) having a small heating value are the surfaces of the heat receiving member 10 in contact with the self-excited vibration heat pipe. It is placed on the opposite side.
In the sixth embodiment, the heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 is projected onto the surface of the heat receiving member 10 opposite to the surface on which the heat generating elements 41 and 42 are arranged, and the heat generating element 42 having a small heat generation amount. It is characterized in that it is arranged in or near the arrangement area of (D1 and D2).
When the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, the division point 40 in the longitudinal direction is arranged in the arrangement area of the above-mentioned heating element 42 having a small heat generation amount.
　発熱量の異なる発熱体の具体例として、３レベルインバータの回路図を図１２に示す。３レベルインバータは、発熱量の大きな発熱体４１として、４個直列に配置したＩＧＢＴ（Ｔ１～Ｔ４）と、発熱量の小さな発熱体４２として、２個直列に接続したクランプダイオード（Ｄ１およびＤ２）とを備える。
　ここで、波型自励振動ヒートパイプ１２を受熱部材１０の長手方向に分割する場合、発熱量の小さなクランプダイオード４２（Ｄ１およびＤ２）を波型自励振動ヒートパイプ１２の長手方向分割点４０付近に配置し、この分割点４０と反対側の波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を、受熱部材１０の発熱体４１および４２を配置した面の反対面に投影した発熱体４１および４２の配置エリア外に配置することで、両方の端部への入力熱量を小さくできる。
　また、受熱部材１０の長手方向に一つの長い波型自励振動ヒートパイプ１２を用いる場合は、発熱量の小さなクランプダイオード４２（Ｄ１およびＤ２）を受熱部材１０の端部に配置し、受熱部材１０の発熱体４２を配置した面の反対面に投影した発熱体４２の配置エリア内に波型自励振動ヒートパイプ１２の端部に最も近い受熱部３を配置してもよい。 A circuit diagram of a three-level inverter is shown in FIG. 12 as a specific example of a heating element having a different heating value. The three-level inverter includes four IGBTs (T1 to T4) arranged in series as heating elements 41 having a large heating value, and two clamping diodes (D1 and D2) connected in series as heating elements 42 having a small heating value. With.
Here, when the corrugated self-excited vibration heat pipe 12 is divided in the longitudinal direction of the heat receiving member 10, the clamp diodes 42 (D1 and D2) having a small heat generation amount are divided in the longitudinal direction division point 40 of the corrugated self-excited vibration heat pipe 12. The heat receiving portion 3 which is arranged in the vicinity and is closest to the end of the wave type self-excited vibration heat pipe 12 on the side opposite to the dividing point 40 is projected on the surface opposite to the surface on which the heat generating elements 41 and 42 of the heat receiving member 10 are arranged. By disposing the heating elements 41 and 42 outside the disposition area, the amount of heat input to both ends can be reduced.
When one long wave type self-excited vibration heat pipe 12 is used in the longitudinal direction of the heat receiving member 10, the clamp diodes 42 (D1 and D2) having a small amount of heat generation are arranged at the end of the heat receiving member 10, The heat receiving portion 3 closest to the end of the wave-type self-excited vibration heat pipe 12 may be arranged in the arrangement area of the heating element 42 projected on the surface opposite to the surface on which the heating element 42 of 10 is arranged.
　実施例６の構成により、発熱量の異なる複数のパワー半導体素子を冷却する場合、波型自励振動ヒートパイプ１２の端部に対応する受熱部材１０のエリアにもパワー半導体素子４２を配置できるため、冷却性能を向上でき、受熱部材１０のスペースを節約できる。 According to the configuration of the sixth embodiment, when cooling a plurality of power semiconductor elements having different heat generation amounts, the power semiconductor element 42 can be arranged in the area of the heat receiving member 10 corresponding to the end of the wave type self-excited vibration heat pipe 12. The cooling performance can be improved, and the space of the heat receiving member 10 can be saved.
１：作動液の流路、２：仕切り部、３：扁平管端部に最も近い受熱部、１０：受熱部材、１１：発熱体、１２：波型自励振動ヒートパイプ、１３：フィン（波型フィン）、２０：放熱部、３０：受熱部材の切欠き部、３１：流路端部の受熱部と接する部分の受熱部材、４０：長手方向分割点、４１：ＩＧＢＴ（Ｔ１～Ｔ４）、４２：クランプダイオード（Ｄ１、Ｄ２）、５０：電気部品、５１：ケース（筐体）、１０１、１０２：風の方向、２００：鉄道車両 1: Flow path of hydraulic fluid, 2: Partition part, 3: Heat receiving part closest to the end of the flat tube, 10: Heat receiving member, 11: Heating element, 12: Wave type self-excited vibration heat pipe, 13: Fin (wave) Mold fins), 20: heat radiating portion, 30: notch portion of heat receiving member, 31: heat receiving member in a portion in contact with the heat receiving portion at the end of the flow path, 40: dividing point in the longitudinal direction, 41: IGBT (T1 to T4), 42: Clamp diode (D1, D2), 50: Electric component, 51: Case (housing), 101, 102: Wind direction, 200: Railway vehicle

Claims (11)

  1. 　多穴扁平管を厚み方向に矩形波状に連通して波型形状に形成すると共に当該多穴扁平管は作動液が封入され密閉されることで受熱部と放熱部とが交互に配置される構造を有する自励振動ヒートパイプと、
    　前記受熱部に接合する受熱部材と、
    　前記受熱部と接合する前記受熱部材の接合面と反対側の面に配置される発熱体と
    を備え、
    　前記受熱部の構成、前記放熱部の構成、前記受熱部材の構成および前記発熱体の構成の内少なくともいずれか一つを変更することで、前記受熱部を介して前記自励振動ヒートパイプに入力される熱量の分布が、前記多穴扁平管の長手方向の中心付近から当該多穴扁平管の端部にかけて小さくなる特性を有する
    ことを特徴とする自励振動ヒートパイプ冷却器。     A structure in which a multi-hole flat tube is formed in a corrugated shape by communicating in a rectangular wave shape in the thickness direction, and the multi-hole flat tube is filled with a working fluid and sealed so that heat receiving portions and heat radiating portions are alternately arranged. A self-excited vibrating heat pipe having
    A heat receiving member joined to the heat receiving portion,
    A heating element disposed on a surface opposite to a bonding surface of the heat receiving member that is bonded to the heat receiving portion,
    Input to the self-excited vibration heat pipe via the heat receiving unit by changing at least one of the configuration of the heat receiving unit, the configuration of the heat radiating unit, the configuration of the heat receiving member, and the configuration of the heating element. A self-excited oscillating heat pipe cooler having a characteristic that the distribution of the amount of heat generated becomes smaller from the vicinity of the longitudinal center of the multi-hole flat tube to the end of the multi-hole flat tube.
  2. 　請求項１に記載された自励振動ヒートパイプ冷却器において、
    　前記自励振動ヒートパイプの前記波型形状は、前記多穴扁平管を当該多穴扁平管の長手方向に前記矩形波状に複数回曲げることで形成される
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to claim 1,
    The corrugated shape of the self-excited vibration heat pipe is formed by bending the multi-hole flat tube in the longitudinal direction of the multi-hole flat tube a plurality of times in the rectangular wave shape. Cooler.
  3. 　請求項１に記載された自励振動ヒートパイプ冷却器において、
    　前記自励振動ヒートパイプの前記波型形状は、前記多穴扁平管を複数本厚み方向に並列に設置し当該多穴扁平管の隣接する両端部それぞれを交互に前記矩形波状に連通することで形成される
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to claim 1,
    The corrugated shape of the self-excited vibration heat pipe is such that a plurality of the multi-hole flat tubes are installed in parallel in the thickness direction and the two adjacent end portions of the multi-hole flat tubes are alternately communicated in the rectangular wave shape. A self-excited vibration heat pipe cooler characterized by being formed.
  4. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記多穴扁平管の端部に最も近い前記受熱部が、前記接合面に投影した前記発熱体の配置エリア外に配置される
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    The self-excited vibration heat pipe cooler, wherein the heat receiving portion closest to the end of the multi-hole flat tube is arranged outside the arrangement area of the heating element projected on the joint surface.
  5. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記多穴扁平管の端部に最も近い前記受熱部に接合する前記受熱部材の厚みと当該最も近い前記受熱部以外の他の前記受熱部に接合する前記受熱部材の厚みが異なる
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    The thickness of the heat receiving member joined to the heat receiving portion closest to the end of the multi-hole flat tube and the thickness of the heat receiving member joined to the heat receiving portion other than the closest heat receiving portion are different. Self-excited vibrating heat pipe cooler.
  6. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記多穴扁平管の端部に最も近い前記受熱部に隣接する前記放熱部と当該放熱部に隣り合う前記放熱部との間に設置されたフィンを有する
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    A self-excited vibration heat pipe having a fin installed between the heat radiating portion adjacent to the heat receiving portion closest to the end of the multi-hole flat tube and the heat radiating portion adjacent to the heat radiating portion. Cooler.
  7. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記放熱部の全てにわたり、隣り合う前記放熱部の間に設置されたフィンを有し、
    　前記多穴扁平管の端部に最も近い前記受熱部に隣接する前記放熱部と当該放熱部に隣り合う前記放熱部との間に設置された前記フィンの枚数を多くする
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    Over all of the heat dissipation part, having fins installed between the adjacent heat dissipation parts,
    The number of the fins provided between the heat radiating portion adjacent to the heat receiving portion closest to the end of the multi-hole flat tube and the heat radiating portion adjacent to the heat radiating portion is increased. Excited vibration heat pipe cooler.
  8. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記多穴扁平管の端部に最も近い前記受熱部の前記接合面の前記長手方向の長さが、当該最も近い前記受熱部以外の他の前記受熱部の前記接合面の前記長手方向の長さより短い
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    The length in the longitudinal direction of the joint surface of the heat receiving portion closest to the end of the multi-hole flat tube is the length in the longitudinal direction of the joint surface of the heat receiving portion other than the closest heat receiving portion. A self-excited vibration heat pipe cooler characterized by being shorter than that.
  9. 　請求項１～３のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記発熱体の中で発熱量の小さい発熱体が、前記反対側の面に投影した前記多穴扁平管の端部に最も近い前記受熱部の配置エリア内または当該エリア付近に配置される
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 3,
    A heat generating element with a small heat generation amount among the heat generating elements is arranged in or near the arrangement area of the heat receiving section closest to the end of the multi-hole flat tube projected on the opposite surface. Characteristic self-excited vibration heat pipe cooler.
  10. 　請求項１～９のいずれか１項に記載された自励振動ヒートパイプ冷却器において、
    　前記受熱部材の長手方向に、複数の前記自励振動ヒートパイプが分割して配置される
    ことを特徴とする自励振動ヒートパイプ冷却器。     The self-excited vibration heat pipe cooler according to any one of claims 1 to 9,
    A self-excited vibration heat pipe cooler, wherein a plurality of the self-excited vibration heat pipes are divided and arranged in a longitudinal direction of the heat receiving member.
  11. 　請求項１～１０のいずれか１項に記載された自励振動ヒートパイプ冷却器を搭載し、自らが搭載する電力変換装置が備える半導体素子が前記発熱体であることを特徴とする電気鉄道車両。 An electric railway vehicle equipped with the self-excited vibration heat pipe cooler according to any one of claims 1 to 10, and a semiconductor element included in a power conversion device installed therein is the heating element. ..
PCT/JP2020/000365 2019-01-31 2020-01-09 Heat sink for self-oscillating heat pipe WO2020158324A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020200110A1 (en) * 2020-01-08 2021-07-08 Robert Bosch Gesellschaft mit beschränkter Haftung Cooling device
DE102021115922A1 (en) 2021-06-21 2022-12-22 Bayerische Motoren Werke Aktiengesellschaft Arrangement of a pulsating heat pipe for cooling power electronic components in a motor vehicle
DE102021116262A1 (en) 2021-06-23 2022-12-29 Bayerische Motoren Werke Aktiengesellschaft Two-sided cooling of power electronics assemblies

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JP2011259536A (en) * 2010-06-07 2011-12-22 Hitachi Ltd Cooling device, power conversion device, and railway vehicle
JP2018088744A (en) * 2016-11-28 2018-06-07 株式会社日立製作所 Electric power conversion apparatus of railway vehicle

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JP2011259536A (en) * 2010-06-07 2011-12-22 Hitachi Ltd Cooling device, power conversion device, and railway vehicle
JP2018088744A (en) * 2016-11-28 2018-06-07 株式会社日立製作所 Electric power conversion apparatus of railway vehicle

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Publication number Priority date Publication date Assignee Title
DE102020200110A1 (en) * 2020-01-08 2021-07-08 Robert Bosch Gesellschaft mit beschränkter Haftung Cooling device
DE102021115922A1 (en) 2021-06-21 2022-12-22 Bayerische Motoren Werke Aktiengesellschaft Arrangement of a pulsating heat pipe for cooling power electronic components in a motor vehicle
DE102021116262A1 (en) 2021-06-23 2022-12-29 Bayerische Motoren Werke Aktiengesellschaft Two-sided cooling of power electronics assemblies
WO2022268502A1 (en) 2021-06-23 2022-12-29 Bayerische Motoren Werke Aktiengesellschaft Bilateral cooling of power electronics assemblies

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