JP2020204429A - Cooling device - Google Patents

Cooling device Download PDF

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JP2020204429A
JP2020204429A JP2019112014A JP2019112014A JP2020204429A JP 2020204429 A JP2020204429 A JP 2020204429A JP 2019112014 A JP2019112014 A JP 2019112014A JP 2019112014 A JP2019112014 A JP 2019112014A JP 2020204429 A JP2020204429 A JP 2020204429A
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working fluid
flow path
opening
path forming
liquid phase
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康光 大見
Yasumitsu Omi
康光 大見
義則　毅
Takeshi Yoshinori
毅 義則
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Denso Corp
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Denso Corp
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Priority to PCT/JP2020/023246 priority patent/WO2020255883A1/en
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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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transportation (AREA)
  • Sustainable Energy (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

To provide a cooling device which has a simple structure and enables improvement of cooling performance.SOLUTION: A cooling device includes, in the cylindrical pipeline part 15, a passage formation member 17 having: a partition part 170 which partitions a cylindrical pipeline part 15 above a liquid surface of a working fluid in a liquid phase when cooling of an object device is stopped; a first opening 171 for flowing the working fluid condensed by a condensation part 16; a second opening 172 for flowing the working fluid evaporated by an evaporation part 14; and a cylindrical passage formation part 173 which extends upward from the second opening 172 in a vertical direction and guides the working fluid introduced from the second opening 172 to an area above the liquid surface in the vertical direction.SELECTED DRAWING: Figure 2

Description

本発明は、対象機器を冷却する冷却装置に関するものである。 The present invention relates to a cooling device for cooling a target device.

近年、電気自動車またはハイブリッド自動車などの電動車両に搭載される蓄電装置などの電気機器の温度を調整するための機器温調装置としてサーモサイフォンを使用した技術が検討されている。 In recent years, a technique using a thermosiphon as a device temperature control device for adjusting the temperature of an electric device such as a power storage device mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle has been studied.

特許文献１に記載の温度調節装置は、電池の冷却時に、温度調節部の内側の作動流体が電池から吸熱して蒸発し、気相流路を通って熱媒体冷却部に流入する。熱媒体冷却部で凝縮した液相の作動流体は、液相流路を通り温度調節部に流入する。この温度調節装置は、蒸発器としての温度調節部、気相流路、凝縮器としての熱媒体冷却部、液相流路の順に作動流体が循環するループ型サーモサイフォンとして構成されている。 In the temperature control device described in Patent Document 1, when the battery is cooled, the working fluid inside the temperature control unit absorbs heat from the battery and evaporates, and flows into the heat medium cooling unit through the gas phase flow path. The liquid phase working fluid condensed in the heat medium cooling section flows into the temperature control section through the liquid phase flow path. This temperature control device is configured as a loop type thermosiphon in which a working fluid circulates in the order of a temperature control unit as an evaporator, a gas phase flow path, a heat medium cooling unit as a condenser, and a liquid phase flow path.

特開２０１５−４１４１８号公報JP-A-2015-41418

上記特許文献１に記載されたものは、気相流路と液相流路が別々に設けられているので、構成が複雑で各流路を構成する配管の体格も大きくなってしまう。 In the one described in Patent Document 1, since the gas phase flow path and the liquid phase flow path are separately provided, the configuration is complicated and the physique of the piping constituting each flow path becomes large.

そこで、図１７に示すように、冷却対象としての電池セル８１を冷却する蒸発器と凝縮器との間の冷媒の移動を１本の配管８０で行う単管型サーモサイフォンとして構成することが考えられる。しかしながら、この場合、以下のような問題が生じる。 Therefore, as shown in FIG. 17, it is conceivable to configure the thermosiphon as a single-tube thermosiphon in which the refrigerant moves between the evaporator and the condenser that cool the battery cell 81 to be cooled by one pipe 80. Be done. However, in this case, the following problems occur.

電池セル８１との熱交換によって蒸発器から配管８０内に流入したガス冷媒は気泡となって配管８０内を上昇しようとする。一方、凝縮器から流出した液冷媒は配管８０内でガス冷媒の上側から下方に流れようとする。すなわち、熱交換部から流出した液冷媒と蒸発器から流出したガス冷媒は対向流となる。 The gas refrigerant that has flowed into the pipe 80 from the evaporator due to heat exchange with the battery cell 81 becomes bubbles and tries to rise in the pipe 80. On the other hand, the liquid refrigerant flowing out of the condenser tends to flow from the upper side to the lower side of the gas refrigerant in the pipe 80. That is, the liquid refrigerant flowing out of the heat exchange section and the gas refrigerant flowing out of the evaporator are countercurrent.

このため、蒸発器から流出した気泡が上昇しにくくなり、凝縮器に到達すべき気相の冷媒の流量が減少する。そして、熱輸送能力が低下し冷却能力が低下するといった問題がある。 Therefore, the bubbles flowing out of the evaporator are less likely to rise, and the flow rate of the gas phase refrigerant that should reach the condenser is reduced. Then, there is a problem that the heat transport capacity is lowered and the cooling capacity is lowered.

本発明は上記点に鑑みたもので、簡素な構成で、かつ、冷却能力を向上することを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to improve the cooling capacity with a simple structure.

上記目的を達成するため、請求項１に記載の発明は、作動流体の液相と気相の相変化に伴う熱移動により対象機器を冷却する冷却装置であって、対象機器の冷却時に作動流体が蒸発するように対象機器と作動流体とが熱交換可能に構成された蒸発部（１４）と、蒸発部より上下方向上側に配置され蒸発部により蒸発した作動流体を凝縮させる凝縮部（１６）と、凝縮部により凝縮した作動流体を蒸発部側へ流すとともに蒸発部により蒸発した作動流体を凝縮部側へ流す筒状の配管部（１５）と、配管部内に配置され配管部内を凝縮部側の空間と蒸発部側の空間に仕切る仕切部（１７０）と、仕切部に形成され凝縮部により凝縮した作動流体を上下方向下側に導入する第１開口部（１７１）と、仕切部に形成され蒸発部により蒸発した作動流体を上下方向上側に導入する第２開口部（１７２）と、第２開口部から対象機器の冷却停止時における液相の作動流体の液面よりも上下方向上側に延びるとともに第２開口部から導入された作動流体を液面よりも上下方向上側へと導く筒状の筒状流路形成部（１７３）と、を有する流路形成部材（１７）と、を備えている。 In order to achieve the above object, the invention according to claim 1 is a cooling device for cooling a target device by heat transfer accompanying a phase change between the liquid phase and the gas phase of the working fluid, and the working fluid is cooled when the target device is cooled. An evaporative part (14) configured so that the target device and the working fluid can exchange heat so that the hydraulic fluid evaporates, and a condensing part (16) arranged above the evaporative part in the vertical direction to condense the working fluid evaporated by the evaporative part. A tubular piping section (15) that allows the working fluid condensed by the condensing section to flow to the evaporation section side and the working fluid evaporated by the evaporating section to flow to the condensing section side, and a tubular piping section (15) that is arranged in the piping section and has the inside of the piping section on the condensing section side. A partition (170) that divides the space and the space on the evaporation part side, and a first opening (171) that is formed in the partition and introduces the working fluid condensed by the condensing part downward in the vertical direction, and is formed in the partition. The second opening (172) that introduces the working fluid evaporated by the evaporating part upward in the vertical direction and the liquid phase of the liquid phase from the second opening upward in the vertical direction when the cooling of the target device is stopped. A flow path forming member (17) having a tubular tubular flow path forming portion (173) that extends and guides the working fluid introduced from the second opening upward in the vertical direction with respect to the liquid level is provided. ing.

このような構成によれば、仕切部に形成された第１開口部、第２開口部および筒状流路形成部によって蒸発部により蒸発して凝縮部側へ向かう作動流体の流れが凝縮部により凝縮して蒸発部側へ向かう作動流体の流れにより阻害されなくなる。したがって、簡素な構成で、かつ、冷却能力を向上することができる。 According to such a configuration, the flow of the working fluid that evaporates by the evaporating portion by the first opening, the second opening, and the tubular flow path forming portion formed in the partition portion and heads toward the condensing portion is caused by the condensing portion. It is not obstructed by the flow of the working fluid that condenses toward the evaporation part side. Therefore, the cooling capacity can be improved with a simple configuration.

なお、各構成要素等に付された括弧付きの参照符号は、その構成要素等と後述する実施
形態に記載の具体的な構成要素等との対応関係の一例を示すものである。 The reference reference numerals in parentheses attached to each component or the like indicate an example of the correspondence between the component or the like and the specific component or the like described in the embodiment described later.

第１実施形態の冷却装置の全体構成を示した図である。It is a figure which showed the whole structure of the cooling device of 1st Embodiment. 第１実施形態の冷却装置の流路形成部材の概略断面図である。It is the schematic sectional drawing of the flow path forming member of the cooling apparatus of 1st Embodiment. 第１実施形態の冷却装置の流路形成部材の外観図である。It is an external view of the flow path forming member of the cooling device of 1st Embodiment. 温度分布の発生について説明するための図である。It is a figure for demonstrating the occurrence of a temperature distribution. 図６におけるＡ−Ｏ−Ｂ断面図である。FIG. 6 is a cross-sectional view taken along the line AOB in FIG. 第２実施形態の冷却装置の概略断面図である。It is the schematic sectional drawing of the cooling apparatus of 2nd Embodiment. 第２実施形態の冷却装置の流路形成部材の外観図である。It is an external view of the flow path forming member of the cooling device of 2nd Embodiment. 第２実施形態の冷却装置の流路形成部材の作動流体の流れを示した図である。It is a figure which showed the flow of the working fluid of the flow path forming member of the cooling device of 2nd Embodiment. 図１０におけるＡ−Ｏ−Ｂ断面図である。FIG. 10 is a cross-sectional view taken along the line AOB in FIG. 第３実施形態の冷却装置の流路形成部材の概略断面図である。It is the schematic sectional drawing of the flow path forming member of the cooling apparatus of 3rd Embodiment. 第３実施形態の冷却装置の流路形成部材の外観図である。It is an external view of the flow path forming member of the cooling device of 3rd Embodiment. 第４実施形態の冷却装置の流路形成部材の概略断面図である。It is the schematic sectional drawing of the flow path forming member of the cooling apparatus of 4th Embodiment. 第４実施形態の冷却装置の流路形成部材の分解図である。It is an exploded view of the flow path forming member of the cooling device of 4th Embodiment. 第５実施形態の冷却装置の全体構成を示した図である。It is a figure which showed the whole structure of the cooling apparatus of 5th Embodiment. 第６実施形態の冷却装置の全体構成を示した図である。It is a figure which showed the whole structure of the cooling apparatus of 6th Embodiment. 図１５中のXVI−XVI断面図である。It is sectional drawing of XVI-XVI in FIG. 課題について説明するための図である。It is a figure for demonstrating an issue.

以下、本発明の実施形態について図面を参照しつつ説明する。なお、以下の各実施形態相互において、互いに同一もしくは均等である部分には、同一符号を付し、その説明を省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, the same or equal parts are designated by the same reference numerals, and the description thereof will be omitted.

（第１実施形態）
第１実施形態に係る冷却装置について図１〜図４を用いて説明する。図１に示すように、冷却装置１０は、車両に搭載された組電池ＢＰを対象機器として冷却する。組電池ＢＰは、直方体形状の複数の電池セルＢＣを有している。そして、組電池ＢＰは、その複数の電池セルＢＣを積層配置した積層体で構成されている。複数の電池セルＢＣは、概ね水平方向に積層配置されている。 (First Embodiment)
The cooling device according to the first embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the cooling device 10 cools the assembled battery BP mounted on the vehicle as a target device. The assembled battery BP has a plurality of battery cells BC having a rectangular parallelepiped shape. The assembled battery BP is composed of a laminated body in which the plurality of battery cells BC are laminated and arranged. The plurality of battery cells BC are arranged in a laminated manner in the substantially horizontal direction.

組電池ＢＰを構成する複数の電池セルＢＣは、電気的に直列に接続されている。組電池ＢＰを構成する各電池セルＢＣは、充放電可能な二次電池（例えば、リチウムイオン電池、鉛蓄電池）で構成されている。なお、電池セルＢＣは、直方体形状に限らず、円筒形状等の他の形状を有していてもよい。また、組電池ＢＰは、電気的に並列に接続された電池セルＢＣを含んで構成されていてもよい。 The plurality of battery cells BC constituting the assembled battery BP are electrically connected in series. Each battery cell BC constituting the assembled battery BP is composed of a rechargeable secondary battery (for example, a lithium ion battery or a lead storage battery). The battery cell BC is not limited to a rectangular parallelepiped shape, and may have another shape such as a cylindrical shape. Further, the assembled battery BP may be configured to include a battery cell BC electrically connected in parallel.

組電池ＢＰは車両の走行中の電力供給等を行うと自己発熱する。また、組電池ＢＰは高温環境下で放置されると、組電池ＢＰの劣化が進行する。そのため、冷却装置１０によって冷却する必要がある。 The assembled battery BP self-heats when power is supplied while the vehicle is running. Further, if the assembled battery BP is left in a high temperature environment, the deterioration of the assembled battery BP progresses. Therefore, it is necessary to cool it by the cooling device 10.

冷却装置１０は、気密に構成された密閉容器１０１と、蒸発熱拡散板１０２と、凝縮熱拡散板１０３とを備えている。冷却装置１０は、密閉容器１０１内に封入された作動流体の液相と気相との相変化に伴う熱移動を行うサーモサイフォンとして構成されている。そして、冷却装置１０は、そのサーモサイフォンでの熱移動により組電池ＢＰを冷却する。 The cooling device 10 includes an airtightly configured airtight container 101, an heat of vaporization diffusion plate 102, and a heat of condensation diffusion plate 103. The cooling device 10 is configured as a thermosiphon that transfers heat according to a phase change between the liquid phase and the gas phase of the working fluid sealed in the closed container 101. Then, the cooling device 10 cools the assembled battery BP by heat transfer in the thermosiphon.

ここで、サーモサイフォンとは、ヒートパイプの一種であり、密閉容器１０１の凝縮部１６で凝縮した液相の作動流体を重力を利用して密閉容器１０１の蒸発部１４へ還流させるものである。図１では、密閉容器１０１における気相の作動流体の流れは破線矢印ＡＧで示され、液相の作動流体の流れは実線矢印ＡＬで示されている。 Here, the thermosiphon is a kind of heat pipe, and returns the working fluid of the liquid phase condensed in the condensing portion 16 of the closed container 101 to the evaporating portion 14 of the closed container 101 by using gravity. In FIG. 1, the flow of the working fluid in the gas phase in the closed container 101 is indicated by the broken arrow AG, and the flow of the working fluid in the liquid phase is indicated by the solid arrow AL.

密閉容器１０１の凝縮部１６と密閉容器１０１の蒸発部１４の間は配管部１５によって接続されている。また、密閉容器１０１と蒸発熱拡散板１０２と凝縮熱拡散板１０３は何れも、高い熱伝導性を有する材料（例えば、アルミニウム、銅、アルミニウム合金などの金属材料）で構成されている。 The condensing portion 16 of the closed container 101 and the evaporation portion 14 of the closed container 101 are connected by a piping portion 15. Further, the closed container 101, the heat of vaporization diffusion plate 102, and the condensation heat diffusion plate 103 are all made of a material having high thermal conductivity (for example, a metal material such as aluminum, copper, or an aluminum alloy).

密閉容器１０１は管状部材で構成されている。本実施形態では、密閉容器１０１を構成する管状部材は１本である。管状部材の材料として、例えば継目無管が採用される。その管状部材は、材料である直管が複数箇所で曲げられることにより形成されている。 The closed container 101 is made of a tubular member. In the present embodiment, the number of tubular members constituting the closed container 101 is one. As a material for the tubular member, for example, a seamless tube is adopted. The tubular member is formed by bending a straight pipe, which is a material, at a plurality of places.

密閉容器１０１内には作動流体が充填されており、密閉容器１０１内は作動流体で満たされている。その作動流体としては、例えば、蒸気圧縮式の冷凍サイクルで利用されるＲ１３４ａ、Ｒ１２３４ｙｆ、Ｒ３２などの冷媒や、水が採用される。 The closed container 101 is filled with a working fluid, and the closed container 101 is filled with a working fluid. As the working fluid, for example, refrigerants such as R134a, R1234yf, and R32 used in a vapor compression refrigeration cycle, and water are adopted.

具体的に、その作動流体は、所定の充填量で密閉容器１０１に充填される。その所定の充填量は、冷却装置１０の車両搭載状態でサーモサイフォンの非作動時における液相の作動流体の液面ＳＦが蒸発部１４よりも上方であり且つ凝縮部１６よりも下方に位置する充填量とされている。なお、そのサーモサイフォンの非作動時とは、密閉容器１０１内で作動流体の蒸発および凝縮が行われていない状態をいう。これに対し、サーモサイフォンの作動時とは、密閉容器１０１内で作動流体の蒸発および凝縮が行われている状態をいう。 Specifically, the working fluid is filled in the closed container 101 with a predetermined filling amount. The predetermined filling amount is such that the liquid level SF of the working fluid of the liquid phase when the thermosiphon is not operating in the vehicle-mounted state of the cooling device 10 is located above the evaporation unit 14 and below the condensing unit 16. It is said to be the filling amount. The non-operating state of the thermosiphon means a state in which the working fluid is not evaporated and condensed in the closed container 101. On the other hand, when the thermosiphon is operating, it means that the working fluid is evaporated and condensed in the closed container 101.

密閉容器１０１は、その密閉容器１０１の機能面に着目すると、蒸発部１４と凝縮部１６と配管部１５とを備えている。その蒸発部１４と凝縮部１６と配管部１５は管状部材の一部として構成されている。蒸発部１４は、サーモサイフォンの非作動時における液相の作動流体の液面ＳＦよりも上下方向下側に配置され、凝縮部１６は、サーモサイフォンの非作動時における液相の作動流体の液面ＳＦよりも上下方向上側に配置されている。 Focusing on the functional aspect of the closed container 101, the closed container 101 includes an evaporation unit 14, a condensing unit 16, and a piping unit 15. The evaporation portion 14, the condensing portion 16, and the piping portion 15 are configured as a part of a tubular member. The evaporation unit 14 is arranged below the liquid level SF of the working fluid of the liquid phase when the thermosiphon is not operating, and the condensing part 16 is the liquid of the working fluid of the liquid phase when the thermosiphon is not operating. It is arranged above the surface SF in the vertical direction.

蒸発部１４は、組電池ＢＰの冷却時に作動流体が蒸発するように組電池ＢＰと作動流体とが熱交換可能に構成されている。蒸発部１４は、組電池ＢＰから蒸発部１４内の作動流体に吸熱させることにより、その作動流体を蒸発させる。そのために、蒸発部１４は、平板形状の蒸発熱拡散板１０２に例えばロウ付け等によって接合されている。その蒸発部１４と蒸発熱拡散板１０２との連結には、両者間の熱伝導性を良好に得られれば、ロウ付け以外の方法が採用されてもよい。 The evaporation unit 14 is configured so that the assembled battery BP and the working fluid can exchange heat so that the working fluid evaporates when the assembled battery BP is cooled. The evaporation unit 14 evaporates the working fluid by absorbing heat from the assembled battery BP to the working fluid in the evaporation unit 14. Therefore, the evaporation unit 14 is joined to the flat plate-shaped evaporation heat diffusion plate 102 by, for example, brazing. For the connection between the evaporation unit 14 and the heat of vaporization diffusion plate 102, a method other than brazing may be adopted as long as the thermal conductivity between the two can be obtained well.

そして、蒸発熱拡散板１０２は、蒸発部１４が接合された一面とは反対側の他面にて、組電池ＢＰに対し熱伝導可能に連結されている。これにより、蒸発部１４は、蒸発熱拡散板１０２を介して、組電池ＢＰに対し熱伝導可能な状態で組電池ＢＰに固定されている。蒸発熱拡散板１０２と組電池ＢＰとの間の熱伝導性が良好に維持されるように、蒸発熱拡散板１０２は、組電池ＢＰに対し押し付けられた状態で保持されている。また、蒸発熱拡散板１０２と組電池ＢＰは直接接触してもよいが、例えば、蒸発熱拡散板１０２と組電池ＢＰとの間には熱伝導シート材またはグリスが挟まれることにより、両者間の熱伝導性が高められている。 The heat of vaporization diffusion plate 102 is thermally conductively connected to the assembled battery BP on the other surface opposite to the one surface to which the evaporation portion 14 is joined. As a result, the evaporation unit 14 is fixed to the assembly battery BP in a state of being heat conductive to the assembly battery BP via the evaporation heat diffusion plate 102. The heat of vaporization diffusion plate 102 is held in a pressed state against the battery BP so that the thermal conductivity between the heat of vaporization diffusion plate 102 and the assembled battery BP is well maintained. Further, the heat of vaporization diffusion plate 102 and the assembled battery BP may be in direct contact with each other, but for example, a heat conductive sheet material or grease is sandwiched between the heat of vaporization diffusion plate 102 and the assembled battery BP. The thermal conductivity of is enhanced.

蒸発部１４は、車両の水平方向に対し傾斜して延びるように配置されている。具体的には、蒸発部１４の下端１４ｂよりも蒸発部１４の上端１４ａが上方に位置するように、蒸発部１４は、車両の水平方向に対し僅かに傾斜して延びている。 The evaporation unit 14 is arranged so as to extend at an angle with respect to the horizontal direction of the vehicle. Specifically, the evaporation unit 14 extends slightly inclined with respect to the horizontal direction of the vehicle so that the upper end 14a of the evaporation unit 14 is located above the lower end 14b of the evaporation unit 14.

これにより、蒸発部１４内で蒸発した気相の作動流体は、下端１４ｂ側ではなく蒸発部１４の上端１４ａ側へ流れ、その上端１４ａから配管部１５を通って凝縮部１６へ流れる。すなわち、蒸発部１４内で気泡となった気相の作動流体は蒸発部１４から凝縮部１６へ流出しやすく、且つ、液相の作動流体は凝縮部１６から蒸発部１４へ戻りやすくなっている。 As a result, the working fluid of the gas phase evaporated in the evaporation section 14 flows not to the lower end 14b side but to the upper end 14a side of the evaporation section 14, and flows from the upper end 14a to the condensing section 16 through the piping section 15. That is, the working fluid of the gas phase that has become bubbles in the evaporation unit 14 easily flows out from the evaporation unit 14 to the condensing unit 16, and the working fluid of the liquid phase easily returns from the condensing unit 16 to the evaporating unit 14. ..

凝縮部１６は、蒸発部１４より上下方向上側に配置され蒸発部１４により蒸発した作動流体を凝縮させる。凝縮部１６は、蒸発部１４で気化した作動流体から空気へ放熱させることにより、その作動流体を凝縮させる。そのために、凝縮部１６は、平板形状の凝縮熱拡散板１０３に例えばロウ付け等によって接合されている。その凝縮部１６と凝縮熱拡散板１０３との連結には、両者間の熱伝導性を良好に得られれば、ロウ付け以外の方法が採用されてもよい。なお、凝縮部１６の放熱先は、空気だけでなく、水などの低温物としてもよい。 The condensing unit 16 is arranged above the evaporating unit 14 in the vertical direction and condenses the working fluid evaporated by the evaporating unit 14. The condensing unit 16 condenses the working fluid by dissipating heat from the working fluid vaporized by the evaporating unit 14 to the air. Therefore, the condensing portion 16 is joined to the flat plate-shaped condensing heat diffusion plate 103 by, for example, brazing. For the connection between the condensing portion 16 and the condensed heat diffusing plate 103, a method other than brazing may be adopted as long as the thermal conductivity between the two can be obtained well. The heat dissipation destination of the condensing unit 16 may be not only air but also a low temperature substance such as water.

凝縮部１６は、上述した蒸発部１４と同様の姿勢で配置されている。すなわち、凝縮部１６は、車両の水平方向に対し傾斜して延びるように配置されている。具体的には、凝縮部１６の上端１６ａよりも凝縮部１６の下端１６ｂが下方に位置するように、凝縮部１６は、車両９０の水平方向に対し僅かに傾斜して延びている。 The condensing unit 16 is arranged in the same posture as the evaporation unit 14 described above. That is, the condensing portion 16 is arranged so as to extend so as to be inclined with respect to the horizontal direction of the vehicle. Specifically, the condensing portion 16 extends slightly inclined with respect to the horizontal direction of the vehicle 90 so that the lower end 16b of the condensing portion 16 is located below the upper end 16a of the condensing portion 16.

これにより、凝縮部１６内で凝縮した液相の作動流体は、重力の作用により、上端１６ａ側ではなく凝縮部１６の下端１６ｂ側へ流れ、その下端１６ｂから配管部１５を通って蒸発部１４へ流れる。すなわち、凝縮部１６内の気泡など気相の作動流体は上昇し上端１６ａ側へ移動しやすく、且つ、凝縮部１６内の液相の作動流体は凝縮部１６の下端１６ｂから蒸発部１４へ流出しやすくなっている。 As a result, the working fluid of the liquid phase condensed in the condensing portion 16 flows to the lower end 16b side of the condensing portion 16 instead of the upper end 16a side due to the action of gravity, and evaporates from the lower end 16b through the piping portion 15. Flow to. That is, the working fluid of the gas phase such as air bubbles in the condensing part 16 rises and easily moves to the upper end 16a side, and the working fluid of the liquid phase in the condensing part 16 flows out from the lower end 16b of the condensing part 16 to the evaporation part 14. It is easier to do.

なお、凝縮部１６と蒸発部１４との間に高低差が設けられていれば、凝縮部１６および蒸発部１４は水平方向に対して傾斜して配置されていなくても冷却装置は冷却作動することができる。 If a height difference is provided between the condensing portion 16 and the evaporating portion 14, the cooling device operates even if the condensing portion 16 and the evaporating portion 14 are not arranged at an angle with respect to the horizontal direction. be able to.

配管部１５は、凝縮部１６と蒸発部１４の間に配置されている。配管部１５は、上下方向に延びる直線状の直線部１５ａと、屈曲して凝縮部１６の下端１６ｂと接続される屈曲部１５ｂを有している。配管部１５は、凝縮部１６により凝縮した液相の作動流体を蒸発部１４側へ流すとともに蒸発部１４により蒸発した気相の作動流体を凝縮部１６側へ流す単管として構成されている。 The piping portion 15 is arranged between the condensing portion 16 and the evaporation portion 14. The piping portion 15 has a linear straight portion 15a extending in the vertical direction and a bent portion 15b that is bent and connected to the lower end 16b of the condensing portion 16. The piping unit 15 is configured as a single pipe in which the working fluid of the liquid phase condensed by the condensing unit 16 flows to the evaporation unit 14 side and the working fluid of the gas phase evaporated by the evaporation unit 14 flows to the condensing unit 16 side.

図１〜図２に示すように、配管部１５の内部には、流路形成部材１７が配置されている。流路形成部材１７は、対象機器の冷却停止時、すなわち、サーモサイフォンの非作動時における液相の作動流体の液面ＳＦよりも上下方向上側の配管部１５内に配置されている。 As shown in FIGS. 1 and 2, a flow path forming member 17 is arranged inside the piping portion 15. The flow path forming member 17 is arranged in the piping portion 15 above the liquid level SF of the working fluid of the liquid phase when the target device is stopped cooling, that is, when the thermosiphon is not operating.

図２〜図３に示すように、流路形成部材１７は、配管部１５内を凝縮部１６側の空間と蒸発部１４側の空間に仕切る仕切部１７０を有している。仕切部１７０は、有底円筒形状を成している。仕切部１７０は、上下方向上側に開口するよう配置されている。 As shown in FIGS. 2 to 3, the flow path forming member 17 has a partition portion 170 that partitions the inside of the piping portion 15 into a space on the condensing portion 16 side and a space on the evaporation portion 14 side. The partition portion 170 has a bottomed cylindrical shape. The partition portion 170 is arranged so as to open upward in the vertical direction.

仕切部１７０の底部には、凝縮部１６により凝縮した液相の作動流体を上下方向下側に導く第１開口部１７１が形成されている。また、仕切部１７０の底部には、蒸発部１４により蒸発した気相の作動流体を上下方向上側に導く第２開口部１７２が形成されている。また、仕切部１７０の底部には、第２開口部１７２から対象機器の冷却停止時における液相の作動流体の液面よりも上下方向上側に延びる筒状の筒状流路形成部１７３が形成されている。また、配管部１５の内周面と筒状流路形成部１７３との間には隙間が形成されている。 At the bottom of the partition portion 170, a first opening 171 that guides the working fluid of the liquid phase condensed by the condensing portion 16 downward in the vertical direction is formed. Further, at the bottom of the partition portion 170, a second opening 172 is formed to guide the working fluid of the gas phase evaporated by the evaporation portion 14 upward in the vertical direction. Further, at the bottom of the partition portion 170, a tubular tubular flow path forming portion 173 extending vertically upward from the liquid level of the working fluid of the liquid phase when cooling of the target device is stopped is formed from the second opening 172. Has been done. Further, a gap is formed between the inner peripheral surface of the piping portion 15 and the tubular flow path forming portion 173.

凝縮部１６により凝縮した液相の作動流体の多くは、配管部１５の内周面に沿って流下する。本実施形態の冷却装置は、配管部１５の内周面と筒状流路形成部１７３との間には隙間が形成されているので、凝縮部１６により凝縮した液相の作動流体の筒状流路形成部１７３への侵入が抑制される。また、上昇しようとする気相の作動流体と流下しようとする液相の作動流体がぶつかりにくくすることもできる。 Most of the working fluid of the liquid phase condensed by the condensing portion 16 flows down along the inner peripheral surface of the piping portion 15. In the cooling device of the present embodiment, since a gap is formed between the inner peripheral surface of the piping portion 15 and the tubular flow path forming portion 173, the tubular shape of the working fluid of the liquid phase condensed by the condensing portion 16 Invasion into the flow path forming portion 173 is suppressed. In addition, it is possible to prevent the working fluid of the gas phase that is going to rise and the working fluid of the liquid phase that is going to flow down from colliding with each other.

ところで、液相の作動流体が気化すると、その体積は２０倍以上になる。このため、気相の作動流体が通る第２開口部１７２の開口面積は、液相の作動流体が通る第１開口部１７１の開口面積よりも十分大きくなっている。 By the way, when the working fluid of the liquid phase is vaporized, its volume becomes 20 times or more. Therefore, the opening area of the second opening 172 through which the working fluid of the gas phase passes is sufficiently larger than the opening area of the first opening 171 through which the working fluid of the liquid phase passes.

また、仕切部１７０は、凝縮部１６により凝縮した液相の作動流体を集めて第１開口部１７１から蒸発部１４側へ流すとともに蒸発部１４により蒸発した気相の作動流体を第２開口部１７２および筒状流路形成部１７３を介して凝縮部１６側へ流す。 Further, the partition portion 170 collects the working fluid of the liquid phase condensed by the condensing part 16 and flows it from the first opening 171 to the evaporation part 14 side, and at the same time, the working fluid of the gas phase evaporated by the evaporation part 14 is passed through the second opening. The fluid flows to the condensing portion 16 side via the 172 and the tubular flow path forming portion 173.

仕切部１７０の外周面には、複数の係止爪１７５およびフランジ部１７６が形成されている。フランジ部１７６は第１突出部に相当し、係止爪１７５は第２突出部に相当する。複数の係止爪１７５およびフランジ部１７６は、仕切部１７０の外周面から径方向外側に突出している。一方、配管部１５の内周面には、該内周面から配管部の中心に向かって突出する凸部１５０が形成されている。 A plurality of locking claws 175 and flange portions 176 are formed on the outer peripheral surface of the partition portion 170. The flange portion 176 corresponds to the first protruding portion, and the locking claw 175 corresponds to the second protruding portion. The plurality of locking claws 175 and the flange portion 176 project radially outward from the outer peripheral surface of the partition portion 170. On the other hand, on the inner peripheral surface of the piping portion 15, a convex portion 150 protruding from the inner peripheral surface toward the center of the piping portion is formed.

配管部１５の内径よりもフランジ部１７６の外形が小さくなっている。このため、配管部１５の内周面とフランジ部１７６との間に隙間ｔが形成されるようになっている。 The outer shape of the flange portion 176 is smaller than the inner diameter of the piping portion 15. Therefore, a gap t is formed between the inner peripheral surface of the piping portion 15 and the flange portion 176.

配管部１５の内部に流路形成部材１７が挿入されると、複数の係止爪１７５が弾性変形して、フランジ部１７６と複数の係止爪１７５が凸部１５０を挟み込む。このようにして、仕切部１７０が配管部１５の内部に固定されている。 When the flow path forming member 17 is inserted into the piping portion 15, the plurality of locking claws 175 are elastically deformed, and the flange portion 176 and the plurality of locking claws 175 sandwich the convex portion 150. In this way, the partition portion 170 is fixed inside the piping portion 15.

また、配管部１５の内周面とフランジ部１７６との間に隙間ｔが形成されるようになっているので、配管部１５の内部に流路形成部材１７をスムーズに挿入することができる。 Further, since the gap t is formed between the inner peripheral surface of the piping portion 15 and the flange portion 176, the flow path forming member 17 can be smoothly inserted into the piping portion 15.

また、配管部１５の内部には、第１開口部１７１に接続された筒状の筒状流路形成部１７４が配置されている。筒状流路形成部１７４は、仕切部１７０から上下方向下側に向かって延びている。筒状流路形成部１７４は、第１開口部１７１に導入された作動流体を、第１開口部１７１よりも上下方向下側へと導く。 Further, inside the piping portion 15, a tubular tubular flow path forming portion 174 connected to the first opening 171 is arranged. The tubular flow path forming portion 174 extends downward from the partition portion 170 in the vertical direction. The tubular flow path forming portion 174 guides the working fluid introduced into the first opening 171 downward in the vertical direction with respect to the first opening 171.

筒状流路形成部１７４には、管状を成す液相流路部１８が接続されている。液相流路部１８は、凝縮部１６により凝縮し、第１開口部１７１に導入された作動流体を、液相の作動流体の液面ＳＦよりも上下方向下側に導く。なお、筒状流路形成部１７４および液相流路部１８は、液相流路形成部に相当する。 A tubular liquid phase flow path portion 18 is connected to the tubular flow path forming portion 174. The liquid phase flow path portion 18 is condensed by the condensing portion 16 and guides the working fluid introduced into the first opening 171 downward in the vertical direction with respect to the liquid level SF of the working fluid of the liquid phase. The tubular flow path forming portion 174 and the liquid phase flow path portion 18 correspond to the liquid phase flow path forming portion.

液相流路部１８は、蛇腹状に形成された樹脂や伸縮性のあるエラストマー等により構成することができる。液相流路部１８を配管部１５の内部に挿入する際に、配管部１５の形状に合わせて液相流路部１８が変形するようになっている。なお、配管部１５へ挿入後に配管部１５を曲げ加工することも可能である。また、液相流路部１８を備えることなく、筒状流路形成部１７４を液相の作動流体の液面ＳＦより上下方向下側に向けて伸びるようにしてもよい。なお、アルミニウム、銅等の金属により筒状流路形成部１７４を構成して、挿入後に曲げ加工することもできる。 The liquid phase flow path portion 18 can be formed of a bellows-shaped resin, an elastic elastomer, or the like. When the liquid phase flow path portion 18 is inserted into the piping portion 15, the liquid phase flow path portion 18 is deformed according to the shape of the piping portion 15. It is also possible to bend the piping portion 15 after inserting it into the piping portion 15. Further, the tubular flow path forming portion 174 may be extended downward in the vertical direction from the liquid level SF of the working fluid of the liquid phase without providing the liquid phase flow path portion 18. It is also possible to form the tubular flow path forming portion 174 with a metal such as aluminum or copper and bend it after insertion.

ただし、液相流路部１８は、沸騰する液相の作動流体からの受熱を低減するため、断熱部材により構成するのが好ましい。なお、金属筒状流路の場合は、表面あるいは内面に断熱層を有するのが好ましい。 However, the liquid phase flow path portion 18 is preferably formed of a heat insulating member in order to reduce heat reception from the working fluid of the boiling liquid phase. In the case of a metal tubular flow path, it is preferable to have a heat insulating layer on the surface or the inner surface.

次に、冷却装置１０が組電池ＢＰを冷却する場合の作動について説明する。図１に示すように、冷却装置１０において蒸発部１４が組電池ＢＰから受熱すると、蒸発部１４内の液相の作動流体は、その組電池ＢＰの熱により蒸発する。これにより、組電池ＢＰは熱を奪われ冷却される。蒸発部１４で蒸発した気相の作動流体は密閉容器１０１内で上昇する。そして、気相の作動流体は液相の作動流体の液面より上下方向上側に達すると、流路形成部材１７の筒状流路形成部１７３を通って凝縮部１６へと導入される。 Next, the operation when the cooling device 10 cools the assembled battery BP will be described. As shown in FIG. 1, when the evaporating unit 14 receives heat from the assembled battery BP in the cooling device 10, the working fluid of the liquid phase in the evaporating unit 14 evaporates due to the heat of the assembled battery BP. As a result, the assembled battery BP is deprived of heat and cooled. The working fluid of the gas phase evaporated in the evaporation unit 14 rises in the closed container 101. Then, when the working fluid of the gas phase reaches the upper side in the vertical direction from the liquid level of the working fluid of the liquid phase, it is introduced into the condensing part 16 through the tubular flow path forming part 173 of the flow path forming member 17.

また、凝縮部１６に到達した気相の作動流体は空気へ放熱して凝縮し、その凝縮した液相の作動流体は、重力の作用により流下して流路形成部材１７の仕切部１７０に集められた後、第１開口部１７１を通って蒸発部１４へ到達する。 Further, the working fluid of the gas phase that has reached the condensing portion 16 is radiated to the air and condensed, and the working fluid of the condensed liquid phase flows down by the action of gravity and is collected in the partition portion 170 of the flow path forming member 17. After that, it reaches the evaporation unit 14 through the first opening 171.

本実施形態の流路形成部材１７には仕切部１７０に形成された第２開口部１７２から凝縮部１６側、すなわち上下方向上側に延びる筒状の筒状流路形成部１７３が形成されている。このため、蒸発部１４で蒸発した気相の作動流体は、凝縮部１６から流下する液相の作動流体の流れの影響を受けることなく筒状流路形成部１７３を通って凝縮部１６にスムーズに到達する。したがって、凝縮部１６に到達すべき冷媒の流量を減少させることがなく、冷却能力を向上することができる。 The flow path forming member 17 of the present embodiment is formed with a tubular tubular flow path forming portion 173 extending from the second opening 172 formed in the partition portion 170 to the condensing portion 16 side, that is, upward in the vertical direction. .. Therefore, the working fluid of the gas phase evaporated in the evaporating part 14 passes through the tubular flow path forming part 173 and smoothly reaches the condensing part 16 without being affected by the flow of the working fluid of the liquid phase flowing down from the condensing part 16. To reach. Therefore, the cooling capacity can be improved without reducing the flow rate of the refrigerant that should reach the condensing portion 16.

また、仕切部１７０に集められた液相の作動流体は、筒状流路形成部１７３を通る気相の作動流体の流れの影響を受けることなく仕切部１７０に形成された第１開口部１７１を通って蒸発部１４へ到達することができる。 Further, the liquid phase working fluid collected in the partition portion 170 is formed in the partition portion 170 without being affected by the flow of the gas phase working fluid passing through the tubular flow path forming portion 173. It can reach the evaporation unit 14 through.

ところで、電池セルＢＣの下方の部位の温度が電池セルＢＣの上方の部位の温度よりも低く、かつ、凝縮部１６によって凝縮された作動流体の温度が電池セルＢＣの上方の部位の温度よりも高い場合、図４に示すように、電池セルＢＣの上方の部位で沸騰が生じる。 By the way, the temperature of the lower part of the battery cell BC is lower than the temperature of the upper part of the battery cell BC, and the temperature of the working fluid condensed by the condensing unit 16 is higher than the temperature of the upper part of the battery cell BC. If it is high, boiling occurs in the upper part of the battery cell BC, as shown in FIG.

この場合、液相の作動流体の液面近くの液相の作動流体が蒸発して上昇し、凝縮部１６によって凝縮された液相の作動流体は液相の作動流体の液面近くまでしか流下しない。したがって、電池セルＢＣの下方の部位の温度は低いままとなる。すなわち、電池セルＢＣの下方の部位の温度と電池セルＢＣの上方の部位の温度差が大きくなる。特に、配管部１５の配管長が長いほど温度分布は不均一となる。 In this case, the working fluid of the liquid phase near the liquid level of the working fluid of the liquid phase evaporates and rises, and the working fluid of the liquid phase condensed by the condensing unit 16 flows down only near the liquid level of the working fluid of the liquid phase. do not do. Therefore, the temperature of the lower portion of the battery cell BC remains low. That is, the temperature difference between the temperature of the lower portion of the battery cell BC and the temperature of the upper portion of the battery cell BC becomes large. In particular, the longer the pipe length of the pipe portion 15, the more uneven the temperature distribution.

しかしながら、本実施形態の冷却装置は、流路形成部材１７の第１開口部１７１から液相の作動流体の液面ＳＦよりも上下方向下側に凝縮部１６により凝縮した液相の作動流体を導く液相流路部１８を備えている。 However, in the cooling device of the present embodiment, the working fluid of the liquid phase condensed by the condensing portion 16 is moved downward in the vertical direction from the liquid level SF of the working fluid of the liquid phase from the first opening 171 of the flow path forming member 17. The liquid phase flow path portion 18 for guiding is provided.

したがって、凝縮部１６により凝縮した液相の作動流体が液相流路部１８を通って液相の作動流体の液面ＳＦよりも上下方向下側に導かれるので、対象機器の温度分布の均一化が可能である。なお、液相流路部１８は、気泡の少ない蒸発部１４の下端１４ｂの近くまで伸びるように配置するのが好ましい。このように、液相流路部１８を、気泡の少ない蒸発部１４の下端１４ｂの近くまで伸びるように配置することにより、電池セルＢＣの下方の部位の温度と電池セルＢＣの上方の部位の温度差を小さくすることができる。 Therefore, the working fluid of the liquid phase condensed by the condensing unit 16 is guided to the lower side in the vertical direction of the liquid level SF of the working fluid of the liquid phase through the liquid phase flow path portion 18, so that the temperature distribution of the target device is uniform. It is possible to change. The liquid phase flow path portion 18 is preferably arranged so as to extend close to the lower end 14b of the evaporation portion 14 having few bubbles. In this way, by arranging the liquid phase flow path portion 18 so as to extend close to the lower end 14b of the evaporation portion 14 having few bubbles, the temperature of the portion below the battery cell BC and the portion above the battery cell BC The temperature difference can be reduced.

以上、説明したように、本実施形態の冷却装置は、作動流体の液相と気相の相変化に伴う熱移動により対象機器を冷却する。本実施形態の冷却装置は、対象機器の冷却時に作動流体が蒸発するように対象機器と作動流体とが熱交換可能に構成された蒸発部１４を備えている。また、蒸発部１４より上下方向上側に配置され蒸発部１４により蒸発した作動流体を凝縮させる凝縮部１６を備えている。また、凝縮部１６により凝縮した作動流体を蒸発部１４側へ流すとともに蒸発部１４により蒸発した作動流体を凝縮部１６側へ流す筒状の配管部１５を備えている。また、流路形成部材１７を備えている。そして、流路形成部材１７は、配管部１５内に配置され配管部１５内を凝縮部１６側の空間と蒸発部１４側の空間に仕切る仕切部１７０を有している。また、仕切部１７０に形成され凝縮部１６により凝縮した作動流体を上下方向下側に導入する第１開口部１７１を有している。また、仕切部１７０に形成され蒸発部１４により蒸発した作動流体を上下方向上側に導入する第２開口部１７２を有している。また、第２開口部１７２から対象機器の冷却停止時における液相の作動流体の液面よりも上下方向上側に延びるとともに第２開口部から導入された作動流体を液面よりも上下方向上側へと導く筒状の筒状流路形成部１７３を有している。 As described above, the cooling device of the present embodiment cools the target device by heat transfer accompanying the phase change of the liquid phase and the gas phase of the working fluid. The cooling device of the present embodiment includes an evaporation unit 14 configured so that the target device and the working fluid can exchange heat so that the working fluid evaporates when the target device is cooled. Further, a condensing unit 16 is provided which is arranged above the evaporating unit 14 in the vertical direction and condenses the working fluid evaporated by the evaporating unit 14. Further, the tubular piping portion 15 is provided so that the working fluid condensed by the condensing unit 16 flows to the evaporation unit 14 side and the working fluid evaporated by the evaporation unit 14 flows to the condensing unit 16 side. It also includes a flow path forming member 17. The flow path forming member 17 has a partition portion 170 that is arranged in the piping portion 15 and partitions the inside of the piping portion 15 into a space on the condensation portion 16 side and a space on the evaporation portion 14 side. Further, it has a first opening 171 formed in the partition portion 170 and for introducing the working fluid condensed by the condensing portion 16 downward in the vertical direction. It also has a second opening 172 that is formed in the partition 170 and introduces the working fluid evaporated by the evaporation section 14 upward in the vertical direction. Further, the working fluid of the liquid phase when the cooling of the target device is stopped extends upward from the second opening 172 in the vertical direction, and the working fluid introduced from the second opening extends upward in the vertical direction from the liquid level. It has a tubular tubular flow path forming portion 173 that leads to.

このような構成によれば、仕切部１７０に形成された第１開口部１７１、第２開口部１７２および筒状流路形成部１７３により蒸発部１４から凝縮部１６側へ向かう作動流体の流れが、凝縮部１６から蒸発部１４側へ向かう作動流体の流れにより阻害されなくなる。したがって、簡素な構成で、かつ、冷却能力を向上することができる。 According to such a configuration, the flow of the working fluid from the evaporation portion 14 to the condensing portion 16 side is caused by the first opening 171 and the second opening 172 and the tubular flow path forming portion 173 formed in the partition portion 170. , It is not obstructed by the flow of the working fluid from the condensing section 16 toward the evaporation section 14. Therefore, the cooling capacity can be improved with a simple configuration.

本実施形態の冷却装置１０のような単管型のサーモサイフォンであっても、ループ型サーモサイフォンのようなスムーズな作動流体の循環が可能である。 Even with a single-tube thermosiphon such as the cooling device 10 of the present embodiment, smooth circulation of a working fluid like a loop-type thermosiphon is possible.

また、ループ管に対して多少管径を大きくしても、単管の方が構成が簡易であるため、搭載性も良好であり、コストを低減することも可能である。 Further, even if the pipe diameter is slightly larger than that of the loop pipe, the single pipe has a simpler configuration, so that the mountability is good and the cost can be reduced.

また、本実施形態の冷却装置は、第１開口部１７１に導入された作動流体を、第１開口部１７１よりも上下方向下側へと導く筒状流路形成部１７４を備えている。 Further, the cooling device of the present embodiment includes a tubular flow path forming portion 174 that guides the working fluid introduced into the first opening 171 downward in the vertical direction with respect to the first opening 171.

これによれば、蒸発部１４により蒸発した作動流体の影響を受けることなく、第１開口部１７１に導入された作動流体を、第１開口部１７１よりも上下方向下側へと導くことが可能である。 According to this, the working fluid introduced into the first opening 171 can be guided to the lower side in the vertical direction with respect to the first opening 171 without being affected by the working fluid evaporated by the evaporation unit 14. Is.

また、本実施形態の冷却装置は、第１開口部に導入された作動流体を、液面より上下方向下側に導く液相流路部１８を備えている。 Further, the cooling device of the present embodiment includes a liquid phase flow path portion 18 that guides the working fluid introduced into the first opening to the lower side in the vertical direction from the liquid level.

したがって、液相流路部１８により、第１開口部に導入された作動流体は、液面より上下方向下側に導かれるので、蒸発部１４の温度分布を均一化することが可能である。 Therefore, the working fluid introduced into the first opening is guided downward in the vertical direction by the liquid phase flow path portion 18, so that the temperature distribution of the evaporation portion 14 can be made uniform.

液相流路部１８が作動流体を蒸発部１４の下方から供給することができるので、単管でありながら、ループ管のように液冷媒が蒸発部１４内をよどみなく流れる。したがって、蒸発部１４の下方に蒸発部１４上方より低温、かつ、凝縮部１６より低温な部位があるような条件になっても、液冷媒が流れることで均温化される。したがって、対象機器の下方の部位の温度と対象機器の上方の部位の温度差を小さくすることができる。すなわち、対象機器の温度分布を均一化することができる。 Since the liquid phase flow path portion 18 can supply the working fluid from below the evaporation portion 14, the liquid refrigerant flows in the evaporation portion 14 without stagnation like a loop pipe even though it is a single pipe. Therefore, even under the condition that there is a portion below the evaporation portion 14 that is lower than the temperature above the evaporation portion 14 and lower than the concentration portion 16, the temperature is equalized by the flow of the liquid refrigerant. Therefore, the temperature difference between the temperature of the lower part of the target device and the temperature of the upper part of the target device can be reduced. That is, the temperature distribution of the target device can be made uniform.

仕切部１７０は、該仕切部１７０の外周面から径方向外側に突出する第１突出部としてのフランジ部１７６および第２突出部としての係止爪１７５を有している。また、配管部１５の内周面には、該内周面から配管部１５の中心に向かって突出する凸部１５０が形成されている。そして、凸部１５０の両側面がフランジ部１７６および係止爪１７５に挟まれることによって仕切部１７０が配管部１５の内部に固定されている。このように、配管部１５の内部に流路形成部材１７を容易に固定することができる。 The partition portion 170 has a flange portion 176 as a first protruding portion and a locking claw 175 as a second protruding portion that project radially outward from the outer peripheral surface of the partition portion 170. Further, a convex portion 150 is formed on the inner peripheral surface of the piping portion 15 so as to project from the inner peripheral surface toward the center of the piping portion 15. The partition portion 170 is fixed to the inside of the piping portion 15 by sandwiching both side surfaces of the convex portion 150 between the flange portion 176 and the locking claw 175. In this way, the flow path forming member 17 can be easily fixed inside the piping portion 15.

また、仕切部１７０は、有底筒形状を成し、上下方向上側に開口しており、第１開口部１７１、第２開口部１７２および筒状流路形成部１７３は、仕切部１７０の底面に形成されている。このように、有底筒形状を成す仕切部１７０の底面に第１開口部１７１、第２開口部１７２および筒状流路形成部１７３を形成することができる。 Further, the partition portion 170 has a bottomed tubular shape and opens upward in the vertical direction, and the first opening 171 and the second opening 172 and the tubular flow path forming portion 173 form the bottom surface of the partition portion 170. Is formed in. In this way, the first opening 171 and the second opening 172 and the tubular flow path forming portion 173 can be formed on the bottom surface of the partition portion 170 having a bottomed tubular shape.

また、第２開口部の開口面積は、第１開口部の開口面積よりも大きくなっている。したがって、液相の作動流体が気化しても十分な通路面積を確保することが可能である。 Further, the opening area of the second opening is larger than the opening area of the first opening. Therefore, it is possible to secure a sufficient passage area even if the working fluid of the liquid phase is vaporized.

（第２実施形態）
第２実施形態に係る冷却装置について図５〜図８を用いて説明する。上記第１実施形態の冷却装置は、流路形成部材１７の仕切部１７０の底面が平坦となっているが、本実施形態の冷却装置は、図５、図７に示すように、流路形成部材１７の仕切部１７０が漏斗形状を成している。また、上記第１実施形態の冷却装置は、１つの筒状流路形成部１７３を有しているが、本実施形態の冷却装置は、図６に示すように、４つの筒状流路形成部１７３を有している。 (Second Embodiment)
The cooling device according to the second embodiment will be described with reference to FIGS. 5 to 8. In the cooling device of the first embodiment, the bottom surface of the partition portion 170 of the flow path forming member 17 is flat, but in the cooling device of the present embodiment, the flow path is formed as shown in FIGS. 5 and 7. The partition portion 170 of the member 17 has a funnel shape. Further, the cooling device of the first embodiment has one tubular flow path forming portion 173, but the cooling device of the present embodiment has four tubular flow path forming portions as shown in FIG. It has a part 173.

図５、図７に示すように、流路形成部材１７の仕切部１７０は、上下方向下側に進むにつれて縮径する中空の円錐台形状を成している。このため、凝縮部１６で凝縮された液相の作動流体が仕切部１７０に溜まりにくく、液相の作動流体を速やかに蒸発部１４側に流下させることができる。 As shown in FIGS. 5 and 7, the partition portion 170 of the flow path forming member 17 has a hollow truncated cone shape whose diameter decreases as it advances downward in the vertical direction. Therefore, the working fluid of the liquid phase condensed in the condensing unit 16 is unlikely to accumulate in the partition portion 170, and the working fluid of the liquid phase can be quickly flowed down to the evaporation unit 14 side.

また、本実施形態の冷却装置は、４つの筒状流路形成部１７３を有している。また、４つの第２開口部１７２の開口面積の合計は、第１開口部１７１の開口面積よりも大きくなっている。したがって、大量の気相の作動流体を凝縮部１６側にスムーズに導くことができる。 Further, the cooling device of the present embodiment has four tubular flow path forming portions 173. Further, the total opening area of the four second openings 172 is larger than the opening area of the first opening 171. Therefore, a large amount of gas phase working fluid can be smoothly guided to the condensing portion 16 side.

本実施形態では、上記第１実施形態と共通の構成から奏される同様の効果を上記第１実施形態と同様に得ることができる。 In the present embodiment, the same effect obtained from the same configuration as that of the first embodiment can be obtained in the same manner as that of the first embodiment.

また、仕切部１７０は、中空の円錐台形状を成し、上下方向下側に進むにつれて縮径するよう配置されている。したがって、凝縮部１６で凝縮された液相の作動流体を蒸発部１４側に速やかに流下させることができる。 Further, the partition portion 170 has a hollow truncated cone shape, and is arranged so as to reduce its diameter as it advances downward in the vertical direction. Therefore, the working fluid of the liquid phase condensed in the condensing unit 16 can be quickly flowed down to the evaporation unit 14 side.

（第３実施形態）
第３実施形態に係る冷却装置について図９〜図１１を用いて説明する。上記第２実施形態の冷却装置は、流路形成部材１７が４つの筒状流路形成部１７３を有しているのに対し、本実施形態の冷却装置は、流路形成部材１７が２つの筒状流路形成部１７３を有している。また、上記第２実施形態の冷却装置は、流路形成部材１７の筒状流路形成部１７３により形成される流路の断面形状が円形を成している。これに対し、本実施形態の冷却装置は、流路形成部材１７の筒状流路形成部１７３により形成される流路の断面形状が略三日月状を成している。 (Third Embodiment)
The cooling device according to the third embodiment will be described with reference to FIGS. 9 to 11. In the cooling device of the second embodiment, the flow path forming member 17 has four tubular flow path forming portions 173, whereas in the cooling device of the present embodiment, the flow path forming member 17 has two. It has a tubular flow path forming portion 173. Further, in the cooling device of the second embodiment, the cross-sectional shape of the flow path formed by the tubular flow path forming portion 173 of the flow path forming member 17 is circular. On the other hand, in the cooling device of the present embodiment, the cross-sectional shape of the flow path formed by the tubular flow path forming portion 173 of the flow path forming member 17 is substantially crescent-shaped.

また、２つの第２開口部１７２の開口面積の合計は、第１開口部１７１の開口面積よりも大きくなっている。したがって、気相の作動流体を効率的に凝縮部１６側に導くことができる。 Further, the total opening area of the two second openings 172 is larger than the opening area of the first opening 171. Therefore, the working fluid of the gas phase can be efficiently guided to the condensing portion 16 side.

本実施形態では、上記第１実施形態と共通の構成から奏される同様の効果を上記第１実施形態と同様に得ることができる。 In the present embodiment, the same effect obtained from the same configuration as that of the first embodiment can be obtained in the same manner as that of the first embodiment.

（第４実施形態）
第４実施形態に係る冷却装置について図１２〜図１３を用いて説明する。本実施形態の流路形成部材１７は、筒状流路形成部１７３と仕切部１７０とが別体で構成されている。筒状流路形成部１７３は、３つの開口部１７３１を有している。また、仕切部１７０は、漏斗形状を成している。仕切部１７０には、１つの第１開口部１７１と、３つの第２開口部１７２が形成されている。 (Fourth Embodiment)
The cooling device according to the fourth embodiment will be described with reference to FIGS. 12 to 13. In the flow path forming member 17 of the present embodiment, the tubular flow path forming portion 173 and the partition portion 170 are separately formed. The tubular flow path forming portion 173 has three openings 1731. Further, the partition portion 170 has a funnel shape. The partition 170 is formed with one first opening 171 and three second openings 172.

そして、仕切部１７０に形成された３つの開口部１７３１が、それぞれ仕切部１７０に３つの第２開口部１７２と連結して、筒状流路形成部１７３が仕切部１７０に組み付けられている。 Then, the three openings 1731 formed in the partition 170 are connected to the partition 170 with the three second openings 172, respectively, and the tubular flow path forming portion 173 is assembled to the partition 170.

本実施形態では、上記第１実施形態と共通の構成から奏される同様の効果を上記第１実施形態と同様に得ることができる。 In the present embodiment, the same effect obtained from the same configuration as that of the first embodiment can be obtained in the same manner as that of the first embodiment.

（第５実施形態）
第５実施形態に係る冷却装置について図１４を用いて説明する。なお、図１４中では、流路形成部材１７を模式的に示してあるが、図１３に示したものと同様の構成をしている。 (Fifth Embodiment)
The cooling device according to the fifth embodiment will be described with reference to FIG. Although the flow path forming member 17 is schematically shown in FIG. 14, it has the same configuration as that shown in FIG.

本実施形態の冷却装置は、２つの配管部１５を有している。２つの配管部１５の一方には、凝縮器１９と流路形成部材１７と液相流路部１８が配置されている。凝縮器１９および流路形成部材１７は、液相の作動流体の液面ＳＦより上下方向上側に配置されている。また、液相流路部１８は、流路形成部材１７に接続されている。液相流路部１８は、凝縮部１６により凝縮した液相の作動流体を、液相の作動流体の液面ＳＦよりも上下方向下側に導く。液相流路部１８は、流路形成部材１７から、蒸発部１４の下端１４ｂの近くまで伸びるように配置されている。 The cooling device of this embodiment has two piping portions 15. A condenser 19, a flow path forming member 17, and a liquid phase flow path portion 18 are arranged on one of the two piping portions 15. The condenser 19 and the flow path forming member 17 are arranged above the liquid level SF of the working fluid of the liquid phase in the vertical direction. Further, the liquid phase flow path portion 18 is connected to the flow path forming member 17. The liquid phase flow path portion 18 guides the working fluid of the liquid phase condensed by the condensing portion 16 downward in the vertical direction with respect to the liquid level SF of the working fluid of the liquid phase. The liquid phase flow path portion 18 is arranged so as to extend from the flow path forming member 17 to the vicinity of the lower end 14b of the evaporation section 14.

２つの配管部１５の一方の上側の端部と２つの配管部１５の他方の上側の端部は接続されている。また、２つの配管部１５の一方の下側の端部と２つの配管部１５の他方の下側の端部は接続されている。 One upper end of the two pipes 15 and the other upper end of the two pipes 15 are connected. Further, one lower end of the two pipes 15 and the other lower end of the two pipes 15 are connected.

２つの配管部１５は、いずれも凝縮部１６により凝縮した液相の作動流体を蒸発部１４側へ流すとともに蒸発部１４により蒸発した気相の作動流体を凝縮部１６側へ流す単管として機能する。このように、単管として機能する配管部１５を複数備えるようにすることもできる。 Each of the two piping units 15 functions as a single pipe for flowing the working fluid of the liquid phase condensed by the condensing part 16 to the evaporation part 14 side and flowing the working fluid of the gas phase evaporated by the evaporation part 14 to the condensing part 16 side. To do. In this way, a plurality of piping portions 15 that function as a single pipe can be provided.

また、２つの配管部１５の一方には、流路形成部材１７が配置されている。この流路形成部材１７には、液相流路部１８が接続されている。そして、液相流路部１８は、気泡の少ない蒸発部１４の下端の近くまで伸びるように配置されている。 Further, a flow path forming member 17 is arranged on one of the two piping portions 15. A liquid phase flow path portion 18 is connected to the flow path forming member 17. The liquid phase flow path portion 18 is arranged so as to extend close to the lower end of the evaporation portion 14 having few bubbles.

したがって、液相流路部１８により、凝縮部１６によって凝縮した液相の作動流体を蒸発部１４の下端の近くまで導くことができる。 Therefore, the liquid phase flow path portion 18 can guide the working fluid of the liquid phase condensed by the condensing portion 16 to near the lower end of the evaporation portion 14.

また、２つの配管部１５の一方の下側の端部と２つの配管部１５の他方の下側の端部は接続されているので、液相流路部１８により蒸発部１４の下端の近くまで導かれた液相の作動流体を２つの配管部１５の他方の下側の端部に導くこともできる。したがって、２つの配管部１５の一方の温度分布だけでなく、２つの配管部１５の他方の温度分布を均一化することができる。 Further, since one lower end of the two piping portions 15 and the other lower end of the two piping portions 15 are connected, the liquid phase flow path portion 18 is near the lower end of the evaporation portion 14. It is also possible to guide the working fluid of the liquid phase guided to the lower end of the other of the two piping portions 15. Therefore, not only the temperature distribution of one of the two piping portions 15 but also the temperature distribution of the other of the two piping portions 15 can be made uniform.

本実施形態では、上記第１実施形態と共通の構成から奏される同様の効果を上記第１実施形態と同様に得ることができる。 In the present embodiment, the same effect obtained from the same configuration as that of the first embodiment can be obtained in the same manner as that of the first embodiment.

（第６実施形態）
第６実施形態に係る冷却装置について図１５〜図１６を用いて説明する。本実施形態では蒸発部１４の構成が第１実施形態と異なっている。また、本実施形態では、図１６に示すように組電池ＢＰが配置されている。なお、図１５では、組電池ＢＰを省略してある。 (Sixth Embodiment)
The cooling device according to the sixth embodiment will be described with reference to FIGS. 15 to 16. In this embodiment, the configuration of the evaporation unit 14 is different from that in the first embodiment. Further, in the present embodiment, the assembled battery BP is arranged as shown in FIG. In FIG. 15, the assembled battery BP is omitted.

また、本実施形態の冷却装置１０は蒸発熱拡散板１０２を備えていない。その一方で、本実施形態の密閉容器１０１は、凝縮部１６と配管部１５と蒸発部１４とを有している。 Further, the cooling device 10 of the present embodiment does not include the heat of vaporization diffusion plate 102. On the other hand, the closed container 101 of the present embodiment has a condensing section 16, a piping section 15, and an evaporation section 14.

また、蒸発部１４は、下方流路部１４４と、上方流路部１４５と、複数の蒸発管１４３とを有している。 Further, the evaporation unit 14 has a lower flow path portion 144, an upper flow path portion 145, and a plurality of evaporation pipes 143.

複数の蒸発管１４３は車両上下方向に延びている。複数の蒸発管１４３はそれぞれ、扁平断面形状を成している。そして、蒸発管１４３の両側の扁平面１４３ａ、１４３ｂにそれぞれ、電池側面ＢＰｂが熱伝導シート材３５を介して押し付けられた状態で組電池ＢＰが連結されている。これにより、組電池ＢＰは、蒸発部１４のうち複数の蒸発管１４３に対して熱伝導可能に固定されている。 The plurality of evaporation pipes 143 extend in the vertical direction of the vehicle. Each of the plurality of evaporation tubes 143 has a flat cross-sectional shape. Then, the assembled battery BP is connected to the flat surfaces 143a and 143b on both sides of the evaporation tube 143 in a state where the battery side surface BPb is pressed via the heat conductive sheet material 35, respectively. As a result, the assembled battery BP is thermally conductively fixed to the plurality of evaporation tubes 143 of the evaporation section 14.

また、複数の蒸発管１４３の下端１４３ｃは下方流路部１４４へそれぞれ連結し、その下端１４３ｃにて蒸発管１４３は下方流路部１４４へ連通している。また、複数の蒸発管１４３の上端１４３ｄは上方流路部１４５へそれぞれ連結し、その上端１４３ｄにて蒸発管１４３は上方流路部１４５へ連通している。 Further, the lower end 143c of the plurality of evaporation pipes 143 is connected to the lower flow path portion 144, respectively, and the evaporation pipe 143 communicates with the lower flow path portion 144 at the lower end 143c thereof. Further, the upper end 143d of the plurality of evaporation pipes 143 is connected to the upper flow path portion 145, respectively, and the evaporation pipe 143 communicates with the upper flow path portion 145 at the upper end 143d thereof.

下方流路部１４４は複数の電池セルＢＣの積層方向へ延びるように形成され、その複数の積層方向の一方にて配管部１５の下端へつながっている。下方流路部１４４は組電池ＢＰおよび複数の蒸発管１４３よりも下方に位置し、組電池ＢＰおよび熱伝導シート材３５に対して間隔を空けて配置されている。 The lower flow path portion 144 is formed so as to extend in the stacking direction of the plurality of battery cells BC, and is connected to the lower end of the piping portion 15 in one of the plurality of stacking directions. The lower flow path portion 144 is located below the assembled battery BP and the plurality of evaporation tubes 143, and is arranged at intervals with respect to the assembled battery BP and the heat conductive sheet material 35.

上方流路部１４５は複数の電池セルＢＣの積層方向へ延びるように形成され、下方流路部１４４、組電池ＢＰ、および複数の蒸発管１４３よりも上方に位置している。また、上方流路部１４５は電池セルＢＣの積層方向の一方にて、配管部１５のうちの流路形成部材１７に対する下方の部位に接続されている。 The upper flow path portion 145 is formed so as to extend in the stacking direction of the plurality of battery cells BC, and is located above the lower flow path portion 144, the assembled battery BP, and the plurality of evaporation tubes 143. Further, the upper flow path portion 145 is connected to a portion of the piping portion 15 below the flow path forming member 17 in one of the stacking directions of the battery cells BC.

このように構成された本実施形態の冷却装置１０では、図１５に示すように、蒸発管１４３が組電池ＢＰから受熱すると、その蒸発管１４３内の液相の作動流体は、その組電池ＢＰの熱により蒸発する。これにより、組電池ＢＰは熱を奪われ冷却される。蒸発管１４３で蒸発した気相の作動流体は上昇して上方流路部１４５へ流入し、上方流路部１４５から配管部１５へと流れる。そして、配管部１５内に配置された流路形成部材１７を通って凝縮部１６へと導かれる。 In the cooling device 10 of the present embodiment configured in this way, as shown in FIG. 15, when the evaporation pipe 143 receives heat from the assembled battery BP, the working fluid of the liquid phase in the evaporation pipe 143 is the assembled battery BP. Evaporates due to the heat of. As a result, the assembled battery BP is deprived of heat and cooled. The working fluid of the gas phase evaporated in the evaporation pipe 143 rises and flows into the upper flow path portion 145, and flows from the upper flow path portion 145 to the piping portion 15. Then, it is guided to the condensing portion 16 through the flow path forming member 17 arranged in the piping portion 15.

また、凝縮部１６から流下する液相の作動流体は、流路形成部材１７および液相流路部１８を通って蒸発部１４の下方流路部１４４へ流下する。ここで、その流下する液相の作動流体は、流路形成部材１７および液相流路部１８を通るので、上方流路部１４５から配管部１５内を上下方向上側に向かって上昇する気相の作動流体の流れの影響を受けることなく蒸発部１４に到達する。 Further, the working fluid of the liquid phase flowing down from the condensing unit 16 flows down to the lower flow path portion 144 of the evaporation portion 14 through the flow path forming member 17 and the liquid phase flow path portion 18. Here, since the working fluid of the liquid phase flowing down passes through the flow path forming member 17 and the liquid phase flow path portion 18, the gas phase that rises from the upper flow path portion 145 in the piping portion 15 in the vertical direction upward. It reaches the evaporation part 14 without being affected by the flow of the working fluid of.

そして、下方流路部１４４へ流入した液相の作動流体は、下方流路部１４４から複数の蒸発管１４３のそれぞれへ分配される。このように作動流体の液相と気相との相変化が密閉容器１０１内で繰り返されることにより、組電池ＢＰは冷却される。 Then, the working fluid of the liquid phase flowing into the lower flow path portion 144 is distributed from the lower flow path portion 144 to each of the plurality of evaporation pipes 143. By repeating the phase change between the liquid phase and the gas phase of the working fluid in the closed container 101 in this way, the assembled battery BP is cooled.

本実施形態では、上記第１実施形態と共通の構成から奏される同様の効果を上記第１実施形態と同様に得ることができる。 In the present embodiment, the same effect obtained from the same configuration as that of the first embodiment can be obtained in the same manner as that of the first embodiment.

（他の実施形態）
（１）上記各実施形態では、流路断面が円形となった配管部１５を備えたが、配管部１５の流路断面は円形に限られるものではなく、例えば、多角形や楕円形状とすることもできる。 (Other embodiments)
(1) In each of the above embodiments, the piping portion 15 having a circular flow path cross section is provided, but the flow path cross section of the piping portion 15 is not limited to a circular shape, and is, for example, a polygonal shape or an elliptical shape. You can also do it.

（２）上記各実施形態では、配管部１５の内周面に仕切部１７０を固定したが、配管部１５の内周面と仕切部１７０の間にシール部材を配置するようにしてもよい。 (2) In each of the above embodiments, the partition portion 170 is fixed to the inner peripheral surface of the piping portion 15, but a seal member may be arranged between the inner peripheral surface of the piping portion 15 and the partition portion 170.

（３）上記各実施形態では、管状を成す液相流路部１８を配置したが、この液相流路部１８の途中に貫通孔を形成し、この貫通孔から蒸発部１４に作動流体の一部を戻すようにしてもよい。 (3) In each of the above embodiments, the tubular liquid phase flow path portion 18 is arranged, but a through hole is formed in the middle of the liquid phase flow path portion 18, and the working fluid is transferred from the through hole to the evaporation portion 14. You may try to bring back a part.

（４）上記各実施形態では、対象機器の冷却停止時における液相の作動流体の液面ＳＦよりも上下方向上側の配管部１５内に流路形成部材１７を配置した。これに対し、対象機器の冷却停止時における液相の作動流体の液面ＳＦよりも上下方向上側の配管部１５内に筒状流路形成部１７３の上下方向上側の開口部が位置するように流路形成部材１７を配置してもよい。 (4) In each of the above embodiments, the flow path forming member 17 is arranged in the piping portion 15 above the liquid level SF of the working fluid of the liquid phase when the target device is stopped cooling. On the other hand, the opening on the upper side of the tubular flow path forming part 173 is located in the piping part 15 on the upper side of the liquid level SF of the working fluid of the liquid phase when the cooling of the target device is stopped. The flow path forming member 17 may be arranged.

（５）上記各実施形態では、流路形成部材１７と液相流路部１８を別体で構成したが、流路形成部材１７と液相流路部１８を一体で構成してもよい。 (5) In each of the above embodiments, the flow path forming member 17 and the liquid phase flow path portion 18 are formed separately, but the flow path forming member 17 and the liquid phase flow path portion 18 may be integrally formed.

（６）図１４に示した第２凝縮器１９には外周面にフィンが設けられていないが、第２凝縮器１９の外周面にフィンを備えるようにしてもよい。 (6) Although the second condenser 19 shown in FIG. 14 is not provided with fins on the outer peripheral surface, fins may be provided on the outer peripheral surface of the second condenser 19.

（７）上記各実施形態では、車両に搭載された組電池ＢＰを対象機器として冷却する例を示したが、組電池ＢＰだけでなく、例えば、電子機器、発熱機器を冷却する冷却装置として使用することもできる。 (7) In each of the above embodiments, an example of cooling the assembled battery BP mounted on the vehicle as a target device is shown, but it is used as a cooling device for cooling not only the assembled battery BP but also electronic devices and heat generating devices, for example. You can also do it.

（８）上記各実施形態では、車両に搭載された組電池ＢＰを対象機器として冷却する例を示したが、車載用の部品だけでなく、例えば、家庭用、設備用の部材を冷却する冷却装置として使用することもできる。 (8) In each of the above embodiments, an example of cooling the assembled battery BP mounted on the vehicle as a target device has been shown, but cooling for cooling not only in-vehicle parts but also, for example, household and equipment members. It can also be used as a device.

（９）上記各実施形態では、配管部１５の内部に流路形成部材１７を固定した例を示したが、例えば、作動流体の液面変動により変動する構成としてもよい。具体的には、流路形成部材１７が液相の作動流体に対し浮力を有し、液面近傍に流路形成部材１７が浮遊するよう構成することもできる。 (9) In each of the above embodiments, an example in which the flow path forming member 17 is fixed inside the piping portion 15 is shown, but for example, the configuration may vary due to fluctuations in the liquid level of the working fluid. Specifically, the flow path forming member 17 may have buoyancy with respect to the working fluid of the liquid phase, and the flow path forming member 17 may be suspended in the vicinity of the liquid surface.

（１０）上記各実施形態では、蛇腹状に形成された液相流路部１８を備えた例を示したが、例えば、ホースによって液相流路部１８を構成することもできる。 (10) In each of the above embodiments, an example including the liquid phase flow path portion 18 formed in a bellows shape is shown, but for example, the liquid phase flow path portion 18 can be configured by a hose.

（１１）上記各実施形態では、気相の作動流体が通る第２開口部１７２の開口面積が、液相の作動流体が通る第１開口部１７１の開口面積よりも十分大きくなるようにした。気体は液体よりも密度が小さいため、気相の作動流体が通る第２開口部１７２の開口面積は、少なくとも液相の作動流体が通る第１開口部１７１の開口面積の２倍以上とする必要がある。 (11) In each of the above embodiments, the opening area of the second opening 172 through which the working fluid of the gas phase passes is made sufficiently larger than the opening area of the first opening 171 through which the working fluid of the liquid phase passes. Since gas has a lower density than liquid, the opening area of the second opening 172 through which the working fluid of the gas phase passes must be at least twice the opening area of the first opening 171 through which the working fluid of the liquid phase passes. There is.

（１２）上記各実施形態では、上下方向に延びる直線状の直線部１５ａと屈曲して凝縮部１６の下端１６ｂと接続される屈曲部１５ｂを有する配管部１５を備えた。これに対し、直線状の直線部１５ａを斜めに傾斜して配置することもできる。 (12) In each of the above embodiments, a piping portion 15 having a linear straight portion 15a extending in the vertical direction and a bent portion 15b that is bent and connected to the lower end 16b of the condensing portion 16 is provided. On the other hand, the straight straight portion 15a can be arranged at an oblique angle.

なお、本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。また、上記各実施形態は、互いに無関係なものではなく、組み合わせが明らかに不可な場合を除き、適宜組み合わせが可能である。また、上記各実施形態において、実施形態を構成する要素は、特に必須であると明示した場合および原理的に明らかに必須であると考えられる場合等を除き、必ずしも必須のものではないことは言うまでもない。また、上記各実施形態において、実施形態の構成要素の個数、数値、量、範囲等の数値が言及されている場合、特に必須であると明示した場合および原理的に明らかに特定の数に限定される場合等を除き、その特定の数に限定されるものではない。また、上記各実施形態において、構成要素等の材質、形状、位置関係等に言及するときは、特に明示した場合および原理的に特定の材質、形状、位置関係等に限定される場合等を除き、その材質、形状、位置関係等に限定されるものではない。 The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. Further, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle. No. Further, in each of the above embodiments, when numerical values such as the number, numerical values, amounts, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and in principle, they are clearly limited to a specific number. It is not limited to the specific number except when it is done. In addition, in each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified or, in principle, the material, shape, positional relationship, etc. are limited to a specific material, shape, etc. , The material, shape, positional relationship, etc. are not limited.

（まとめ）
上記各実施形態の一部または全部で示された第１の観点によれば、冷却装置は、対象機器の冷却時に作動流体が蒸発するように対象機器と作動流体とが熱交換可能に構成された蒸発部を備えている。また、蒸発部より上下方向上側に配置され蒸発部により蒸発した作動流体を凝縮させる凝縮部を備えている。また、凝縮部により凝縮した作動流体を蒸発部側へ流すとともに蒸発部により蒸発した作動流体を凝縮部側へ流す筒状の配管部を備えている。また、流路形成部材を備えている。そして、流路形成部材は、配管部内に配置され配管部内を凝縮部側の空間と蒸発部側の空間に仕切る仕切部を有している。また、仕切部に形成され凝縮部により凝縮した作動流体を上下方向下側に導入する第１開口部を有している。また、仕切部に形成され蒸発部により蒸発した作動流体を上下方向上側に導入する第２開口部を有している。また、第２開口部から対象機器の冷却停止時における液相の作動流体の液面よりも上下方向上側に延びる筒状の筒状流路形成部を有している。 (Summary)
According to the first aspect shown in part or all of the above embodiments, the cooling device is configured so that the target device and the working fluid can exchange heat so that the working fluid evaporates when the target device is cooled. It has an evaporative part. Further, it is provided with a condensing portion which is arranged above the evaporating portion in the vertical direction and condenses the working fluid evaporated by the evaporating portion. Further, it is provided with a tubular piping portion that allows the working fluid condensed by the condensing portion to flow to the evaporation portion side and the working fluid evaporated by the evaporating portion to flow to the condensing portion side. It also includes a flow path forming member. The flow path forming member is arranged in the piping portion and has a partition portion that partitions the inside of the piping portion into a space on the condensing portion side and a space on the evaporation portion side. Further, it has a first opening for introducing the working fluid formed in the partition portion and condensed by the condensing portion downward in the vertical direction. Further, it has a second opening for introducing the working fluid formed in the partition portion and evaporated by the evaporation portion in the vertical direction. Further, it has a tubular tubular flow path forming portion extending vertically upward from the second opening to the liquid level of the working fluid of the liquid phase when cooling of the target device is stopped.

また、第２の観点によれば、冷却装置は、第１開口部に導入された作動流体を、第１開口部よりも上下方向下側へと導く筒状流路形成部を備えている。 Further, according to the second aspect, the cooling device includes a tubular flow path forming portion that guides the working fluid introduced into the first opening to the lower side in the vertical direction from the first opening.

これによれば、蒸発部により蒸発した作動流体の影響を受けることなく、第１開口部に導入された作動流体を、第１開口部よりも上下方向下側へと導くことが可能である。 According to this, it is possible to guide the working fluid introduced into the first opening to the lower side in the vertical direction from the first opening without being affected by the working fluid evaporated by the evaporating part.

また、第３の観点によれば、冷却装置は、第１開口部に導入された作動流体を、液面より上下方向下側に導く液相流路形成部を備えている。 Further, according to the third aspect, the cooling device includes a liquid phase flow path forming portion that guides the working fluid introduced into the first opening to the lower side in the vertical direction from the liquid surface.

したがって、液相流路形成部により、第１開口部に導入された作動流体は、液面より上下方向下側に導かれるので、蒸発部の温度分布を均一化することが可能である。 Therefore, the working fluid introduced into the first opening is guided downward in the vertical direction from the liquid surface by the liquid phase flow path forming portion, so that the temperature distribution of the evaporation portion can be made uniform.

また、第４の観点によれば、仕切部は、該仕切部の外周面から径方向外側に突出する第１突出部および第２突出部を有している。また、配管部の内周面には、該内周面から配管部の中心に向かって突出する凸部が形成されている。そして、凸部の両側面が第１突出部および第２突出部に挟まれることによって仕切部が配管部の内部に固定されている。このように、配管部の内部に流路形成部材を容易に固定することができる。 Further, according to the fourth aspect, the partition portion has a first protruding portion and a second protruding portion that project radially outward from the outer peripheral surface of the partition portion. Further, on the inner peripheral surface of the piping portion, a convex portion is formed so as to project from the inner peripheral surface toward the center of the piping portion. Then, the partition portion is fixed to the inside of the piping portion by sandwiching both side surfaces of the convex portion between the first protruding portion and the second protruding portion. In this way, the flow path forming member can be easily fixed inside the piping portion.

また、第５の観点によれば、仕切部は、有底筒形状を成し、上下方向上側に開口している。また、第１開口部、第２開口部および筒状流路形成部は、仕切部の底面に形成されている。このように、有底筒形状を成す仕切部の底面に第１開口部、第２開口部および筒状流路形成部を形成することができる。 Further, according to the fifth viewpoint, the partition portion has a bottomed tubular shape and opens upward in the vertical direction. Further, the first opening, the second opening and the tubular flow path forming portion are formed on the bottom surface of the partition portion. In this way, the first opening, the second opening, and the tubular flow path forming portion can be formed on the bottom surface of the partition portion having a bottomed tubular shape.

また、第６の観点によれば、仕切部は、中空の円錐台形状を成し、上下方向下側に進むにつれて縮径するよう配置されている。したがって、凝縮部で凝縮された液相の作動流体を蒸発部側に速やかに流下させることができる。 Further, according to the sixth aspect, the partition portion has a hollow truncated cone shape and is arranged so that the diameter decreases as it advances downward in the vertical direction. Therefore, the working fluid of the liquid phase condensed in the condensing portion can be quickly flowed down to the evaporation portion side.

また、第７の観点によれば、第２開口部の開口面積は、第１開口部の開口面積よりも大きくなっている。したがって、液相の作動流体が気化しても十分な通路面積を確保することが可能である。 Further, according to the seventh viewpoint, the opening area of the second opening is larger than the opening area of the first opening. Therefore, it is possible to secure a sufficient passage area even if the working fluid of the liquid phase is vaporized.

なお、上記実施形態における構成と特許請求の範囲の構成との対応関係について説明すると、フランジ部１７６が第１突出部に相当し、係止爪１７５が第２突出部に相当し、筒状流路形成部１７４および液相流路部１８が液相流路形成部に相当する。 Explaining the correspondence between the configuration in the above embodiment and the configuration of the claims, the flange portion 176 corresponds to the first protruding portion, the locking claw 175 corresponds to the second protruding portion, and the tubular flow The path forming portion 174 and the liquid phase flow path portion 18 correspond to the liquid phase flow path forming portion.

１０ 冷却装置
１４ 蒸発部
１５ 配管部
１６ 凝縮部
１７ 流路形成部材
１８ 流路部材
１０２ 蒸発熱拡散板
１０３ 凝縮熱拡散板 10 Cooling device 14 Evaporation part 15 Piping part 16 Condensing part 17 Flow path forming member 18 Flow path member 102 Evaporation heat diffusion plate 103 Condensation heat diffusion plate

Claims (7)

作動流体の液相と気相の相変化に伴う熱移動により対象機器を冷却する冷却装置であって、
前記対象機器の冷却時に前記作動流体が蒸発するように前記対象機器と前記作動流体とが熱交換可能に構成された蒸発部（１４）と、
前記蒸発部より上下方向上側に配置され前記蒸発部により蒸発した前記作動流体を凝縮させる凝縮部（１６）と、
前記凝縮部により凝縮した前記作動流体を前記蒸発部側へ流すとともに前記蒸発部により蒸発した前記作動流体を前記凝縮部側へ流す筒状の配管部（１５）と、
前記配管部内に配置され前記配管部内を前記凝縮部側の空間と前記蒸発部側の空間に仕切る仕切部（１７０）と、前記仕切部に形成され前記凝縮部により凝縮した前記作動流体を上下方向下側に導入する第１開口部（１７１）と、前記仕切部に形成され前記蒸発部により蒸発した前記作動流体を前記上下方向上側に導入する第２開口部（１７２）と、前記第２開口部から前記対象機器の冷却停止時における前記液相の前記作動流体の液面よりも前記上下方向上側に延びるとともに前記第２開口部から導入された前記作動流体を前記液面よりも前記上下方向上側へと導く筒状の筒状流路形成部（１７３）と、を有する流路形成部材（１７）と、を備えた冷却装置。 A cooling device that cools the target equipment by heat transfer accompanying the phase change of the liquid phase and gas phase of the working fluid.
An evaporating unit (14) configured so that the target device and the working fluid can exchange heat so that the working fluid evaporates when the target device is cooled.
A condensing unit (16) arranged above the evaporating unit in the vertical direction and condensing the working fluid evaporated by the evaporating unit,
A tubular piping portion (15) that allows the working fluid condensed by the condensing portion to flow to the evaporation portion side and the working fluid evaporated by the evaporating portion to the condensing portion side.
A partition portion (170) arranged in the piping portion and partitioning the inside of the piping portion into a space on the condensing portion side and a space on the evaporating portion side, and the working fluid formed in the partition portion and condensed by the condensing portion are vertically oriented. A first opening (171) to be introduced on the lower side, a second opening (172) to introduce the working fluid formed in the partition and evaporated by the evaporation part to the upper side in the vertical direction, and the second opening. When the cooling of the target device is stopped, the working fluid of the liquid phase extends upward from the liquid level in the vertical direction and is introduced from the second opening in the vertical direction with respect to the liquid level. A cooling device including a tubular tubular flow path forming portion (173) leading to the upper side, and a flow path forming member (17) having the tubular flow path forming portion (173). 前記第１開口部に導入された前記作動流体を、前記第１開口部よりも上下方向下側へと導く筒状流路形成部（１７４）を備えた請求項１に記載の冷却装置。 The cooling device according to claim 1, further comprising a tubular flow path forming portion (174) that guides the working fluid introduced into the first opening to the lower side in the vertical direction with respect to the first opening. 前記第１開口部に導入された前記作動流体を、前記液面より上下方向下側に導く液相流路形成部（１７４、１８）を備えた請求項１または２に記載の冷却装置。 The cooling device according to claim 1 or 2, further comprising a liquid phase flow path forming portion (174, 18) for guiding the working fluid introduced into the first opening to the lower side in the vertical direction from the liquid level. 前記仕切部は、該仕切部の外周面から径方向外側に突出する第１突出部（１７６）および第２突出部（１７５）を有し、
前記配管部の内周面には、該内周面から前記配管部の中心に向かって突出する凸部（１５０）が形成されており、
前記凸部の両側面が前記第１突出部および前記第２突出部に挟まれることによって前記仕切部が前記配管部の内部に固定されている請求項１ないし３のいずれか１つに記載の冷却装置。 The partition portion has a first protruding portion (176) and a second protruding portion (175) protruding radially outward from the outer peripheral surface of the partition portion.
A convex portion (150) protruding from the inner peripheral surface toward the center of the piping portion is formed on the inner peripheral surface of the piping portion.
The invention according to any one of claims 1 to 3, wherein the partition portion is fixed inside the piping portion by sandwiching both side surfaces of the convex portion between the first protruding portion and the second protruding portion. Cooling system. 前記仕切部は、有底筒形状を成し、前記上下方向上側に開口しており、
前記第１開口部、前記第２開口部および前記筒状流路形成部は、前記仕切部の底面に形成されている請求項１ないし４のいずれか１つに記載の冷却装置。 The partition portion has a bottomed tubular shape and opens upward in the vertical direction.
The cooling device according to any one of claims 1 to 4, wherein the first opening, the second opening, and the tubular flow path forming portion are formed on the bottom surface of the partition portion. 前記仕切部は、中空の円錐台形状を成し、前記上下方向下側に進むにつれて縮径するよう配置されている請求項１ないし４のいずれか１つに記載の冷却装置。 The cooling device according to any one of claims 1 to 4, wherein the partition portion has a hollow truncated cone shape and is arranged so as to reduce the diameter as it advances downward in the vertical direction. 前記第２開口部の開口面積は、前記第１開口部の開口面積よりも大きくなっている請求項１ないし６のいずれか１つに記載の冷却装置。 The cooling device according to any one of claims 1 to 6, wherein the opening area of the second opening is larger than the opening area of the first opening.
JP2019112014A 2019-06-17 2019-06-17 Cooling device Pending JP2020204429A (en)

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JPS58150795A (en) * 1982-03-03 1983-09-07 Mitsubishi Heavy Ind Ltd Heat pipe
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