JP2009062915A - Exhaust heat recovery unit - Google Patents

Exhaust heat recovery unit Download PDF

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Publication number
JP2009062915A
JP2009062915A JP2007232525A JP2007232525A JP2009062915A JP 2009062915 A JP2009062915 A JP 2009062915A JP 2007232525 A JP2007232525 A JP 2007232525A JP 2007232525 A JP2007232525 A JP 2007232525A JP 2009062915 A JP2009062915 A JP 2009062915A
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evaporation
connecting portion
plate
heat recovery
cover
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JP2007232525A
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Masataka Ota
政孝 太田
Yoshihiko Suzuki
義彦 鈴木
Masao Toi
昌夫 戸井
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Denso Corp
Toyota Motor Corp
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Denso Corp
Toyota Motor Corp
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Priority to JP2007232525A priority Critical patent/JP2009062915A/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
    • F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust heat recovery unit capable of relieving thermal stress, while securing sealability of a heating fluid. <P>SOLUTION: In this exhaust heat recovery unit, a cover part 121 is integrally formed in a connecting part with respective connecting parts 151 and 152 in a duct part 120; first and second washers 18 and 19 having a through-hole are arranged in a clearance between the respective connecting parts 151 and 152 and a cover part 122; the first washer 18 is made slidable relative to the respective connecting parts 151 and 152; the second washer 19 is made slidable relative to the cover part 121; an outer diameter of the first washer 18 is formed smaller than an outer diameter of the second washer 19; an inner diameter of the through-hole of the second washer 19 is set in a range of an inner diameter of the through-hole of the first washer 18 to the outer diameter of the first washer 18; a clearance 17 for absorbing a thermal expansion difference between an evaporation part 110 and the duct part 120 generated between the evaporation side connecting part 151 and the condensation side connecting part 152, is set between the cover part 121 and the first washer 18; and a labyrinth structure is constituted of the first and second washers 18 and 19. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、自動車等の車両に用いられる排熱回収器に関する。   The present invention relates to an exhaust heat recovery device used for a vehicle such as an automobile.

近年、ヒートパイプの原理を利用して車両のエンジンの排気系から排気ガスの排気熱を回収して、この排気熱を暖機促進等に利用する技術が知られている。   2. Description of the Related Art In recent years, a technology is known in which exhaust heat of exhaust gas is recovered from an exhaust system of a vehicle engine using the principle of a heat pipe, and this exhaust heat is used for promoting warm-up.

このような排熱回収器は、エンジンの排気管内にヒートパイプの蒸発部を配設するとともに、エンジンの冷却水経路内にヒートパイプの凝縮部を配設し、排気ガスの排気熱によって冷却水を加熱している（例えば、特許文献１参照）。   In such an exhaust heat recovery device, a heat pipe evaporating part is provided in the exhaust pipe of the engine, and a heat pipe condensing part is provided in the engine cooling water path so that the cooling water is cooled by the exhaust heat of the exhaust gas. Is heated (see, for example, Patent Document 1).

また、ヒートパイプの原理を利用した熱交換器として、ループ型ヒートパイプ式熱交換器が提案されている（例えば、特許文献２参照）。これは、閉ループを形成する密閉された循環経路と、循環経路内に封入され、蒸発および凝縮可能な作動流体と、循環経路に配設され、外部からの入熱により作動流体を蒸発させる蒸発部と、循環経路の蒸発部より高い位置に配設され、蒸発部で蒸発した作動流体と外部からの被加熱流体との間で熱交換を行う凝縮部とを有するものである。
特開昭６２−２６８７２２号公報 特開平４−４５３９３号公報 In addition, a loop heat pipe type heat exchanger has been proposed as a heat exchanger using the principle of a heat pipe (see, for example, Patent Document 2). This includes a closed circulation path that forms a closed loop, a working fluid enclosed in the circulation path that can be evaporated and condensed, and an evaporation unit that is disposed in the circulation path and evaporates the working fluid by heat input from the outside. And a condensing part that is disposed at a position higher than the evaporation part of the circulation path and exchanges heat between the working fluid evaporated in the evaporation part and the fluid to be heated from the outside.
Japanese Patent Laid-Open No. 62-268722 JP-A-4-45393

車両への搭載性に有利な、簡素でコンパクトな構造の排熱回収器を提供しようとする場合、蒸発部と凝縮部を一体に構成する事が望ましい。一例を示すと、複数本のヒートパイプを有する蒸発部と凝縮部とが水平方向に隣接して配置され、蒸発部で蒸発した作動流体を凝縮部に導く蒸発側連結部と、凝縮部で凝縮した作動流体を蒸発部に導く凝縮側連結部とを備えるような構成が考えられる。このとき、蒸発部は排気ガス（加熱流体）が流通する筐体内に配置されており、各連結部は筐体に接合されている。   In order to provide an exhaust heat recovery device having a simple and compact structure that is advantageous for mounting on a vehicle, it is desirable that the evaporating section and the condensing section are configured integrally. As an example, an evaporation unit having a plurality of heat pipes and a condensing unit are arranged adjacent to each other in the horizontal direction, and an evaporating side connecting unit that guides the working fluid evaporated in the evaporating unit to the condensing unit, and condensing in the condensing unit It is conceivable to have a condensing side connecting part that guides the working fluid to the evaporating part. At this time, the evaporating part is disposed in a casing through which exhaust gas (heating fluid) flows, and each connecting part is joined to the casing.

このような排熱回収器において、蒸発部と筐体との間の温度差が生じると、各連結部における筐体との根付部に熱膨張差に起因する熱応力が発生するという問題がある。これに対し、筐体における各連結部が接合された面にスリットを設けることで熱膨張差に起因する熱応力を吸収する手段が考えられるが、スリットから筐体外部への排気ガスの流出を防止する、すなわち排気ガスのシール性を確保することが困難である。   In such an exhaust heat recovery device, when a temperature difference occurs between the evaporation unit and the housing, there is a problem that thermal stress due to a difference in thermal expansion occurs in the root portion of each connecting portion with the housing. . On the other hand, a means for absorbing thermal stress due to a difference in thermal expansion by providing a slit on the surface of each housing where the connecting portions are joined can be considered. It is difficult to prevent, that is, to ensure the sealing property of exhaust gas.

本発明は、上記点に鑑み、加熱流体のシール性を確保しつつ、熱応力を緩和することができる排熱回収器を提供することを目的とする。   An object of this invention is to provide the waste heat recovery device which can relieve | moderate a thermal stress, ensuring the sealing performance of a heating fluid in view of the said point.

上記目的を達成するため、本発明では、筐体（１２０）における蒸発側連結部（１５１）および凝縮側連結部（１５２）のうち少なくとも一方との接続部には、当該少なくとも一方の連結部（１５１、１５２）の外周面を覆うカバー部（１２１）が、筐体（１２０）と一体に形成されており、少なくとも一方の連結部（１５１、１５２）とカバー部（１２２）との間に設定された隙間には、少なくとも一方の連結部（１５１、１５２）が挿入される貫通穴を有する第１、第２プレート（１８、１９）が設けられており、第１プレート（１８）は少なくとも一方の連結部（１５１、１５２）に対して摺動可能になっているとともに、第２プレート（１９）はカバー部（１２１）に対して摺動可能になっており、第１プレート（１８）の外径は、第２プレート（１９）の外径より小さくなっているとともに、第２プレート（１９）の貫通穴の内径は、第１プレート（１８）の貫通穴の内径以上、第１プレート（１８）の外径未満の範囲内になっており、カバー部（１２１）と第１プレート（１８）との間には、蒸発側連結部（１５１）および凝縮側連結部（１５２）間において発生する蒸発部（１１０）と筐体（１２０）との熱膨張差を吸収するための隙間（１７）が設定されており、第１、第２プレート（１８、１９）により迷路構造が構成されていることを特徴としている。   In order to achieve the above object, according to the present invention, at least one of the connection portions (151) and the condensation side connection portion (152) of the housing (120) is connected to at least one of the connection portions ( 151 and 152) are formed integrally with the housing 120, and are set between at least one of the connecting portions 151 and 152 and the cover 122. The gap is provided with first and second plates (18, 19) having through holes into which at least one connecting portion (151, 152) is inserted, and at least one of the first plate (18) is provided. The second plate (19) is slidable with respect to the cover portion (121), and is slidable with respect to the connecting portions (151, 152) of the first plate (18). The outer diameter is The outer diameter of the first plate (18) is smaller than the outer diameter of the second plate (19), and the inner diameter of the through hole of the second plate (19) is equal to or larger than the inner diameter of the through hole of the first plate (18). The evaporating part (110) generated between the evaporating side connecting part (151) and the condensing side connecting part (152) between the cover part (121) and the first plate (18). ) And the housing (120) are configured to absorb a difference in thermal expansion (17), and the first and second plates (18, 19) constitute a maze structure. Yes.

筐体（１２０）内に加熱流体が流通すると、筐体（１２０）および蒸発部（１１０）が熱膨張し、筐体（１２０）と一体に形成されているカバー部（１２１）と、蒸発部（１１０）に熱的に接続されている少なくとも一方の連結部（１５１、１５２）とが、連結部配置方向外側（各連結部（１５１、１５２）同士が離れる方向、他の連結部から遠ざかる方向）にそれぞれ変位する。このとき、外部に露出している筐体（１２０）と、外部に露出していない蒸発部（１１０）とでは熱膨張量が異なる、すなわち筐体（１２０）と蒸発部（１１０）との間に熱膨張差が発生するため、カバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との連結部配置方向外側の隙間が減少する。そして、カバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との隙間が０になり、カバー部（１２１）と少なくとも一方の連結部（１５１、１５２）とが接触すると、その接触部に熱応力が発生する。   When the heating fluid flows in the housing (120), the housing (120) and the evaporation unit (110) are thermally expanded, and the cover unit (121) formed integrally with the housing (120) and the evaporation unit (110) and at least one connecting portion (151, 152) thermally connected to the outer side in the connecting portion arrangement direction (direction in which the connecting portions (151, 152) are separated from each other, away from other connecting portions) ). At this time, the amount of thermal expansion differs between the case (120) exposed to the outside and the evaporation unit (110) not exposed to the outside, that is, between the case (120) and the evaporation unit (110). Therefore, a gap on the outer side in the connecting portion arrangement direction between the cover portion (121) and at least one of the connecting portions (151, 152) is reduced. When the gap between the cover part (121) and at least one of the connection parts (151, 152) becomes zero and the cover part (121) and at least one of the connection parts (151, 152) come into contact with each other, the contact part Thermal stress is generated.

これに対し、カバー部（１２１）と第１プレート（１８）との間に、蒸発側連結部（１５１）および凝縮側連結部（１５２）間において発生する蒸発部（１１０）と筐体（１２０）との熱膨張差を吸収するための隙間（１７）を設定することで、筐体（１２０）と蒸発部（１１０）との間の熱膨張差によりカバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との隙間が減少したときに、カバー部（１２１）と第１プレート（１８）とが接触することを防止できる。したがって、筐体（１２０）と蒸発部（１１０）との熱膨張差に起因する熱応力の発生を抑制することができる。   On the other hand, between the cover part (121) and the first plate (18), the evaporation part (110) and the housing (120) generated between the evaporation side connection part (151) and the condensation side connection part (152). ) And the gap (17) for absorbing the difference in thermal expansion between the cover (121) and the cover (121) due to the difference in thermal expansion between the housing (120) and the evaporator (110). When the gap between the portions (151 and 152) decreases, the cover portion (121) and the first plate (18) can be prevented from contacting each other. Therefore, generation | occurrence | production of the thermal stress resulting from the thermal expansion difference of a housing | casing (120) and an evaporation part (110) can be suppressed.

また、第１、第２プレート（１８、１９）により、カバー部（１２１）と少なくとも一方の連結部（１５１、１５２）間の隙間に迷路構造を構成することで、カバー部（１２１）と少なくとも一方の連結部（１５１、１５２）間の隙間から筐体（１２０）の外部に加熱流体が流出することを抑制できる。したがって、加熱流体のシール性を確保しつつ、熱応力を緩和することが可能となる。   Further, by forming a labyrinth structure in the gap between the cover part (121) and at least one of the connecting parts (151, 152) by the first and second plates (18, 19), the cover part (121) and at least It is possible to prevent the heated fluid from flowing out of the casing (120) from the gap between the one connecting portions (151, 152). Therefore, it is possible to relax the thermal stress while ensuring the sealing property of the heating fluid.

なお、「迷路構造」とは、周知のごとく、通路の入口側から出口側までに至る部位に、通路が屈曲する部位を少なくとも一カ所設けることにより、通路を流通する流体が直線的に流通することができないようにしたものである。   As is well known, the “maze structure” means that at least one portion where the passage is bent is provided in a portion extending from the entrance side to the exit side of the passage so that the fluid flowing through the passage flows linearly. It is something that cannot be done.

また、上記特徴の排熱回収器において、蒸発側連結部（１５１）および凝縮側連結部（１５２）の配置方向を連結部配置方向としたとき、カバー部（１２１）と第１プレート（１８）との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離が、蒸発側連結部（１５１）および凝縮側連結部（１５２）間において発生する蒸発部（１１０）および筐体（１２０）の連結部配置方向の熱膨張に起因するカバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との隙間の変化量より大きく設定されていてもよい。   Further, in the exhaust heat recovery device having the above characteristics, when the arrangement direction of the evaporation side connection portion (151) and the condensation side connection portion (152) is the connection portion arrangement direction, the cover portion (121) and the first plate (18). The distance on the side farther from the other connecting portion in the connecting portion disposition direction between the evaporation portion (110) and the evaporation side connecting portion (151) and the condensation side connecting portion (152) is generated between the evaporation portion (110) and the housing. You may set larger than the variation | change_quantity of the clearance gap between the cover part (121) and at least one connection part (151,152) resulting from the thermal expansion of the connection part arrangement | positioning direction of a body (120).

また、上記特徴の排熱回収器において、第２プレート（１９）と少なくとも一方の連結部（１５１、１５２）との間には、蒸発側連結部（１５１）および凝縮側連結部（１５２）間において発生する蒸発部（１１０）と筐体（１２０）との熱膨張差を吸収するための隙間（１７０）が設定されていてもよい。   Further, in the exhaust heat recovery device having the above characteristics, between the second plate (19) and at least one of the connection portions (151, 152), between the evaporation side connection portion (151) and the condensation side connection portion (152). A gap (170) for absorbing a difference in thermal expansion between the evaporation section (110) and the casing (120) generated in step S1 may be set.

これによれば、筐体（１２０）と蒸発部（１１０）との間の熱膨張差によりカバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との隙間が減少したときに、第２プレート（１９）の貫通穴と少なくとも一方の連結部（１５１、１５２）とが接触することを防止できる。したがって、筐体（１２０）と蒸発部（１１０）との熱膨張差に起因する熱応力の発生をより抑制することが可能となる。   According to this, when the gap between the cover part (121) and at least one of the connection parts (151, 152) is reduced due to the difference in thermal expansion between the housing (120) and the evaporation part (110), the first It can prevent that the through-hole of 2 plates (19) and at least one connection part (151,152) contact. Therefore, it is possible to further suppress the generation of thermal stress due to the difference in thermal expansion between the casing (120) and the evaporation section (110).

この場合、第２プレート（１９）と少なくとも一方の連結部（１５１、１５２）との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離（Ｚ）が、蒸発側連結部（１５１）および凝縮側連結部（１５２）間において、蒸発部（１１０）と筐体（１２０）との間で連結部配置方向に発生する熱膨張に起因するカバー部（１２１）と少なくとも一方の連結部（１５１、１５２）との隙間の変化量より大きく設定されていてもよい。   In this case, the distance (Z) on the side farther from the other connecting portion of the distance in the connecting portion arrangement direction between the second plate (19) and at least one of the connecting portions (151, 152) is the evaporation side connection. The cover part (121) and / or the cover part (121) caused by thermal expansion occurring in the connecting part arrangement direction between the evaporation part (110) and the housing (120) between the part (151) and the condensing side connecting part (152) It may be set larger than the amount of change in the gap with the connecting portions (151, 152).

また、上記特徴の排熱回収器において、カバー部（１２１）には、第１、第２プレート（１８、１９）がカバー部（１２１）より凝縮部（１３０）側に移動することを規制する蓋部（１２２）が設けられていてもよい。   Further, in the exhaust heat recovery device having the above characteristics, the cover portion (121) restricts the first and second plates (18, 19) from moving from the cover portion (121) to the condensation portion (130) side. A lid (122) may be provided.

これによれば、第１、第２プレート（１８、１９）が凝縮部（１３０）側に移動することを規制することができるため、加熱流体のシール性を確実に確保しつつ、熱応力を確実に緩和することが可能となる。   According to this, since it can control that the 1st, 2nd plate (18, 19) moves to the condensation part (130) side, while ensuring the sealing performance of heating fluid reliably, thermal stress is controlled. It is possible to surely relax.

また、上記特徴の排熱回収器において、少なくとも一方の連結部（１５１、１５２）とカバー部（１２２）との間に設定された隙間には、２つの第１プレート（１８）および１つの第２プレート（１９）が設けられており、１つの第２プレート（１９）が、２つの第１プレート（１８）間に配置されていてもよい。   In the exhaust heat recovery device having the above characteristics, two first plates (18) and one first plate are provided in a gap set between at least one of the connecting portions (151, 152) and the cover portion (122). Two plates (19) may be provided, and one second plate (19) may be disposed between the two first plates (18).

また、上記特徴の排熱回収器において、少なくとも一方の連結部（１５１、１５２）と蒸発部（１１０）とを接続するジョイント（１６）を備え、ジョイント（１６）は、蒸発部（１１０）側に大径部（１６１）、少なくとも一方の連結部（１５１、１５２）側に小径部（１６２）を有しており、第１、第２プレート（１８、１９）は、小径部（１６２）とカバー部（１２２）との間の隙間に設けられており、第１、第２プレート（１８、１９）の貫通穴の内径は、大径部（１６１）の外径より小さく形成されていてもよい。   Further, the exhaust heat recovery device having the above characteristics includes a joint (16) for connecting at least one of the connecting portions (151, 152) and the evaporation portion (110), and the joint (16) is on the evaporation portion (110) side. The large-diameter portion (161) has a small-diameter portion (162) on the side of at least one of the connecting portions (151, 152). The first and second plates (18, 19) are connected to the small-diameter portion (162). Even if the inner diameter of the through hole of the first and second plates (18, 19) is smaller than the outer diameter of the large-diameter portion (161). Good.

これによれば、第１、第２プレート（１８、１９）が蒸発部（１１０）側に移動することを規制することができるため、加熱流体のシール性を確実に確保しつつ、熱応力を確実に緩和することが可能となる。   According to this, since it is possible to restrict the movement of the first and second plates (18, 19) to the evaporation section (110) side, the thermal stress is reliably ensured while ensuring the sealing performance of the heating fluid. It is possible to surely relax.

なお、この欄および特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

以下、本発明の一実施形態について図１〜図３に基づいて説明する。本実施形態の排熱回収器１００は、車両のエンジン（内燃機関）の排気系から排気ガスの排気熱を回収して、この排気熱を暖機促進等に利用するものである。なお、排気ガスが本発明の加熱流体に相当し、エンジン冷却水が被加熱流体に相当している。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The exhaust heat recovery device 100 of the present embodiment recovers exhaust heat of exhaust gas from an exhaust system of an engine (internal combustion engine) of a vehicle and uses this exhaust heat for promoting warm-up. The exhaust gas corresponds to the heating fluid of the present invention, and the engine cooling water corresponds to the heated fluid.

図１は、本実施形態に係る排熱回収器１００の車両への搭載状態を示す模式図である。図１に示すように、エンジン１０は水冷式の内燃機関であり、燃料が燃焼した後の排気ガスが排出される排気筒１１を有している。エンジン１０は、エンジン１０冷却用のエンジン冷却水（以下、冷却水と略す）が循環するラジエータ回路２０と、このラジエータ回路２０とは別の流路として冷却水が循環する排熱回収回路３０と、空調空気加熱用のヒータコア４１に冷却水（温水）が循環するヒータ回路４０とを有している。   FIG. 1 is a schematic diagram illustrating a mounted state of the exhaust heat recovery device 100 according to the present embodiment on a vehicle. As shown in FIG. 1, the engine 10 is a water-cooled internal combustion engine, and has an exhaust cylinder 11 through which exhaust gas after combustion of fuel is discharged. The engine 10 includes a radiator circuit 20 through which engine cooling water for cooling the engine 10 (hereinafter abbreviated as cooling water) circulates, and an exhaust heat recovery circuit 30 through which the cooling water circulates as a flow path different from the radiator circuit 20. The heater core 40 for circulating cooling water (warm water) is provided in the heater core 41 for heating air-conditioning air.

ラジエータ回路２０にはラジエータ２１が設けられており、ラジエータ２１は、ウォータポンプ２２によって循環される冷却水を外気との熱交換により冷却する。ラジエータ回路２０中にはラジエータ２１を迂回して冷却水が流通するバイパス流路２３が設けられており、サーモスタット２４によってラジエータ２１を流通する冷却水量とバイパス流路２３を流通する冷却水量とが調節されるようになっている。特に暖機時においてはバイパス流路２３側の冷却水量が増加されて暖機が促進される。つまり、ラジエータ２１による冷却水の過冷却が防止される。   The radiator circuit 20 is provided with a radiator 21, and the radiator 21 cools the cooling water circulated by the water pump 22 by heat exchange with the outside air. The radiator circuit 20 is provided with a bypass flow path 23 that bypasses the radiator 21 and flows the cooling water, and the thermostat 24 adjusts the amount of cooling water that flows through the radiator 21 and the amount of cooling water that flows through the bypass flow path 23. It has come to be. In particular, during warm-up, the amount of cooling water on the bypass flow path 23 side is increased, and warm-up is promoted. That is, overcooling of the cooling water by the radiator 21 is prevented.

排熱回収回路３０は、ラジエータ回路２０のエンジン出口部から分岐して、ウォータポンプ２２に接続される流路であり、ウォータポンプ２２によって冷却水が循環されるようになっている。排熱回収回路３０の途中には後述する排熱回収器１００の水タンク１４０（凝縮部１３０）が接続されている。   The exhaust heat recovery circuit 30 is a flow path branched from the engine outlet of the radiator circuit 20 and connected to the water pump 22, and cooling water is circulated by the water pump 22. In the middle of the exhaust heat recovery circuit 30, a water tank 140 (condensing unit 130) of the exhaust heat recovery device 100 described later is connected.

また、ヒータ回路４０は、ラジエータ回路２０のエンジン出口部とは異なる部位から冷却水（温水）が流出して、排熱回収回路３０の下流側に合流する回路としている。このヒータ回路４０には、暖房用熱交換器としてのヒータコア４１が設けられており、上記のウォータポンプ２２によって冷却水（温水）が循環されるようにしている。ヒータコア４１は、図示しない空調ユニットの空調ケース内に配設されており、送風機によって送風される空調空気を温水との熱交換により加熱する。   Further, the heater circuit 40 is a circuit in which cooling water (hot water) flows out from a portion different from the engine outlet of the radiator circuit 20 and joins to the downstream side of the exhaust heat recovery circuit 30. The heater circuit 40 is provided with a heater core 41 as a heat exchanger for heating, and cooling water (hot water) is circulated by the water pump 22. The heater core 41 is disposed in an air conditioning case of an air conditioning unit (not shown), and heats the conditioned air blown by the blower by heat exchange with hot water.

図２は、図１のＡ−Ａ断面図である。図２に示すように、本実施形態の排熱回収器１００は、蒸発部１１０、ダクト部１２０、凝縮部１３０、水タンク１４０等を有しており、蒸発部１１０と凝縮部１３０とが互いに接続されることでループ式のヒートパイプ１０１を形成している。   FIG. 2 is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 2, the exhaust heat recovery device 100 of the present embodiment includes an evaporation unit 110, a duct unit 120, a condensing unit 130, a water tank 140, and the like, and the evaporating unit 110 and the condensing unit 130 are mutually connected. By being connected, a loop type heat pipe 101 is formed.

ヒートパイプ１０１には図示しない封入部が設けられており、この封入部からヒートパイプ１０１内が真空引き（減圧）され、作動媒体が封入された後に封入部は封止されている。作動媒体は、ここでは水を使用している。なお、作動媒体としては、水の他にアルコール、フロロカーボン、フロン等を用いてもよい。   The heat pipe 101 is provided with a sealing portion (not shown), and the inside of the heat pipe 101 is evacuated (depressurized) from the sealing portion, and the sealing portion is sealed after the working medium is sealed. Here, water is used as the working medium. As the working medium, alcohol, fluorocarbon, chlorofluorocarbon or the like may be used in addition to water.

蒸発部１１０は、内部を排気ガスが流通するダクト部１２０内に収容されている。また、蒸発部１１０は、排気ガスと後述する作動流体との間で熱交換を行い、作動流体を蒸発させるようになっている。なお、ダクト部１２０が、本発明の筐体に相当している。   The evaporation part 110 is accommodated in a duct part 120 through which exhaust gas flows. Further, the evaporating unit 110 performs heat exchange between the exhaust gas and a working fluid described later, thereby evaporating the working fluid. The duct portion 120 corresponds to the casing of the present invention.

凝縮部１３０は、排気筒１１の外部に設けられており、排熱回収回路３０（図１参照）内に配置される水タンク１４０内に設けられている。また、凝縮部１３０は、蒸発部１１０で蒸発した作動流体と冷却水との間で熱交換を行い、作動流体を凝縮させるようになっている。水タンク１４０には、エンジンの冷却水出口側に接続される冷却水流入口（図示せず）と、エンジンの冷却水入口側に接続される冷却水流出口（図示せず）とが設けられている。なお、水タンク１４０が、本発明の被加熱流体経路に相当している。   The condensing unit 130 is provided outside the exhaust cylinder 11 and is provided in a water tank 140 disposed in the exhaust heat recovery circuit 30 (see FIG. 1). Further, the condensing unit 130 performs heat exchange between the working fluid evaporated in the evaporating unit 110 and the cooling water to condense the working fluid. The water tank 140 is provided with a cooling water inlet (not shown) connected to the cooling water outlet side of the engine and a cooling water outlet (not shown) connected to the cooling water inlet side of the engine. . The water tank 140 corresponds to the heated fluid path of the present invention.

蒸発部１１０および凝縮部１３０は、水平方向に隣接するように配置されている。通常、排気筒１１は車両前後方向に亘って設けられているため、蒸発部１１０および凝縮部１３０の配置方向は、車両幅方向に一致している。   The evaporator 110 and the condenser 130 are arranged so as to be adjacent in the horizontal direction. Usually, since the exhaust pipe 11 is provided over the vehicle front-rear direction, the arrangement direction of the evaporation unit 110 and the condensation unit 130 coincides with the vehicle width direction.

次に、蒸発部１１０の構成について説明する。蒸発部１１０は、複数本の蒸発側チューブ１１１と、蒸発側チューブ１１１の外表面に接合されたコルゲート状の蒸発側フィン１１２とを有している。蒸発側チューブ１１１は、排気ガスの流通方向（図２の紙面垂直方向）が長径方向と一致するように扁平状に形成されているとともに、その長手方向が鉛直方向に一致するように複数本平行に配置されている。   Next, the configuration of the evaporation unit 110 will be described. The evaporation unit 110 includes a plurality of evaporation side tubes 111 and corrugated evaporation side fins 112 joined to the outer surface of the evaporation side tube 111. The evaporation side tube 111 is formed in a flat shape so that the flow direction of the exhaust gas (perpendicular direction in FIG. 2) coincides with the major axis direction, and a plurality of the evaporation side tubes 111 are parallel so that the longitudinal direction thereof coincides with the vertical direction. Is arranged.

蒸発部１１０において、蒸発側チューブ１１１の長手方向両端部には、蒸発側チューブ１１１の積層方向に延びて、複数の蒸発側チューブ１１１と連通する蒸発側ヘッダ１１３、１１４がそれぞれ設けられている。蒸発側ヘッダのうち、下方側に配置されるものを蒸発側下ヘッダ１１３といい、上方側に配置されるものを蒸発側上ヘッダ１１４という。   In the evaporation unit 110, evaporation side headers 113 and 114 that extend in the stacking direction of the evaporation side tubes 111 and communicate with the plurality of evaporation side tubes 111 are provided at both ends in the longitudinal direction of the evaporation side tube 111. Among the evaporation side headers, the one arranged on the lower side is called the evaporation side lower header 113, and the one arranged on the upper side is called the evaporation side upper header 114.

各蒸発側ヘッダ１１３、１１４の蒸発側チューブ１１１に対応する位置には、チューブ孔（図示せず）が穿設されている。そして、複数の蒸発側チューブ１１１の長手方向両端部は、それぞれ各蒸発側ヘッダ１１３、１１４のチューブ孔に接合されており、複数の蒸発側チューブ１１１は、各蒸発側ヘッダ１１３、１１４内と連通している。   Tube holes (not shown) are formed at positions corresponding to the evaporation side tubes 111 of the evaporation side headers 113 and 114. The both ends in the longitudinal direction of the plurality of evaporation side tubes 111 are joined to the tube holes of the evaporation side headers 113 and 114, respectively. The plurality of evaporation side tubes 111 communicate with the inside of each evaporation side header 113 and 114. is doing.

次に、凝縮部１３０の構成について説明する。凝縮部１３０は、上記蒸発部１１０と同様に、長手方向が鉛直方向に一致するように複数本平行に配置される凝縮側チューブ１３１を有しており、各凝縮側チューブ１３１の間には凝縮側フィン１３２が介在されているとともに、各凝縮側チューブ１３１の長手方向両端部が凝縮側上ヘッダ１３３、凝縮側下ヘッダ１３４に接合されて形成されている。複数の凝縮側チューブ１３１は、各凝縮側ヘッダ１３３、１３４内と連通している。   Next, the configuration of the condensing unit 130 will be described. Similar to the evaporation unit 110, the condensing unit 130 includes a plurality of condensing tubes 131 arranged in parallel so that the longitudinal direction thereof coincides with the vertical direction. Side fins 132 are interposed, and both end portions in the longitudinal direction of the respective condensation side tubes 131 are joined to the condensation side upper header 133 and the condensation side lower header 134. The plurality of condensing side tubes 131 communicate with the inside of the condensing side headers 133 and 134.

また、蒸発側ヘッダ１１３、１１４と凝縮側ヘッダ１３３、１３４は、円筒状の連結部１５１、１５２を介して連通状態に接続されている。ここで、連結部のうち、上方側に配置され、蒸発側上ヘッダ１１４と凝縮側上ヘッダ１３３とを接続し、蒸発部１１０で蒸発した作動流体を凝縮部１３０に導くものを蒸発側連結部１５１といい、下方側に配置され、凝縮側下ヘッダ１３３と蒸発側下ヘッダ１１４とを接続し、凝縮部１３０で凝縮された作動流体を蒸発部１１０に導くものを凝縮側連結部１５２という。   Further, the evaporation side headers 113 and 114 and the condensation side headers 133 and 134 are connected in a communicating state via cylindrical connecting portions 151 and 152. Here, of the connecting portions, the evaporation side connecting portion is arranged on the upper side, connects the evaporation side upper header 114 and the condensation side upper header 133, and guides the working fluid evaporated in the evaporation portion 110 to the condensing portion 130. 151, which is disposed on the lower side, connects the condensing side lower header 133 and the evaporating side lower header 114, and guides the working fluid condensed in the condensing unit 130 to the evaporating unit 110 is referred to as a condensing side connecting unit 152.

そして、蒸発側、凝縮側チューブ１１１、１３１、蒸発側、凝縮側ヘッダ１１３、１１４、１３３、１３４および各連結部１５１、１５２によって閉ループが形成されており、作動流体は蒸発部１１０および凝縮部１３０を循環するようになっている。すなわち、蒸発側下ヘッダ１１３→蒸発側チューブ１１１→蒸発側上ヘッダ１１４→蒸発側連結部１５１→凝縮側上ヘッダ１３３→凝縮側チューブ１３１→凝縮側下ヘッダ１３４→凝縮側連結部１５２→蒸発側下ヘッダ１１３が環状に繋がっており、ヒートパイプ１０１を形成している。   Further, a closed loop is formed by the evaporation side, the condensation side tubes 111 and 131, the evaporation side, the condensation side headers 113, 114, 133 and 134, and the connecting portions 151 and 152, and the working fluid is the evaporation unit 110 and the condensation unit 130. It has come to circulate. That is, the evaporation side lower header 113 → the evaporation side tube 111 → the evaporation side upper header 114 → the evaporation side connecting portion 151 → the condensing side upper header 133 → the condensing side tube 131 → the condensing side lower header 134 → the condensing side connecting portion 152 → the evaporation side. The lower header 113 is connected in a ring shape to form the heat pipe 101.

以上のように排熱回収器１００は形成されており、この排熱回収器１００は車両の床下の地上側から見て車室内側にへこむように形成されたへこみ部に配設される。そして、ダクト部１２０が排気筒１１に介在され、また、水タンク１４０の両パイプ（図示せず）が排熱回収回路３０に接続されている。なお、本実施形態では、ダクト部１２０は排気筒１１と一体に成形されている。   As described above, the exhaust heat recovery device 100 is formed, and the exhaust heat recovery device 100 is disposed in a recessed portion formed so as to be recessed toward the vehicle interior as viewed from the ground side under the floor of the vehicle. The duct portion 120 is interposed in the exhaust cylinder 11, and both pipes (not shown) of the water tank 140 are connected to the exhaust heat recovery circuit 30. In the present embodiment, the duct portion 120 is formed integrally with the exhaust tube 11.

図３は、図２のＢ部拡大図である。図２および図３に示すように、各連結部１５１、１５２は、ジョイント１６によって各蒸発側ヘッダ１１３、１１４とそれぞれ接続されている。このジョイント１６は、大径部１６１および小径部１６２を有しており、大径部１６１は小径部１６２より蒸発部１１０側に配置されている。なお、ジョイント１６は、各連結部１５１、１５２の一部を構成している。   FIG. 3 is an enlarged view of a portion B in FIG. As shown in FIGS. 2 and 3, the connecting portions 151 and 152 are connected to the evaporation side headers 113 and 114 by joints 16, respectively. The joint 16 has a large-diameter portion 161 and a small-diameter portion 162, and the large-diameter portion 161 is disposed closer to the evaporation unit 110 than the small-diameter portion 162. The joint 16 constitutes a part of each of the connecting portions 151 and 152.

ダクト部１２０における各連結部１５１、１５２との接続部には、各連結部１５１、１５２の外周を覆うカバー部１２１が一体に形成されている。カバー部１２１は、凝縮部１３０側に突出するように形成されている。また、カバー部１２１と各連結部１５１、１５２の外周面との間には、隙間が設定されており、この隙間はダクト部１２０内と連通している。本実施形態では、カバー部１２１は、ジョイント１６に対応する部位に設けられている。   A cover portion 121 that covers the outer periphery of each of the connecting portions 151 and 152 is formed integrally with the connecting portion of the duct portion 120 with the connecting portions 151 and 152. The cover part 121 is formed so as to protrude toward the condensing part 130 side. Further, a gap is set between the cover part 121 and the outer peripheral surfaces of the connecting parts 151 and 152, and this gap communicates with the inside of the duct part 120. In the present embodiment, the cover part 121 is provided at a site corresponding to the joint 16.

図３に示すように、カバー部１２１とジョイント１６の小径部１６との間の隙間には、第１、第２ワッシャ１８、１９が配設されている。第１ワッシャ１８には、ジョイント１６の小径部１６２が挿入される第１貫通穴が形成されている。同様に、第２ワッシャ１９にも、小径部１６２が挿入される第２貫通穴が形成されている。第１、第２貫通穴は、それぞれジョイント１６に対応する形状（本実施形態では円状）に形成されている。また、第１、第２貫通穴の内径は、大径部１６１の外径より小さくなっている。なお、第１、第２ワッシャ１８、１９が、本発明の第１、第２プレートに相当している。   As shown in FIG. 3, first and second washers 18 and 19 are disposed in the gap between the cover portion 121 and the small diameter portion 16 of the joint 16. The first washer 18 is formed with a first through hole into which the small diameter portion 162 of the joint 16 is inserted. Similarly, the second washer 19 is also formed with a second through hole into which the small diameter portion 162 is inserted. The first and second through holes are each formed in a shape corresponding to the joint 16 (circular shape in the present embodiment). The inner diameters of the first and second through holes are smaller than the outer diameter of the large diameter portion 161. The first and second washers 18 and 19 correspond to the first and second plates of the present invention.

第１ワッシャ１８は、各連結部１５１、１５２に対して各連結部１５１、１５２の軸方向（以下、連結部軸方向という）に摺動可能になっている。また、第２ワッシャ１９は、カバー部１２１に対して連結部軸方向に摺動可能になっている。すなわち、第１貫通穴の内径は、小径部１６２の外径よりも若干大きくなっており、第１貫通穴の内周面と小径部１６２の外周面との間には微小隙間が設定されている。同様に、第２ワッシャ１９の外径は、カバー部１２１の内径より若干小さくなっており、第２ワッシャ１９の外周面とカバー部１２１の内周面との間には微小隙間が設定されている。これらの微小隙間は、各ワッシャ１８、１９が連結部軸方向に移動可能な範囲内で、できる限り小さく設定されており、本実施形態では０．０１ｍｍ程度になっている。   The first washer 18 is slidable in the axial direction of the connecting portions 151 and 152 (hereinafter referred to as the connecting portion axial direction) with respect to the connecting portions 151 and 152. Further, the second washer 19 is slidable in the connecting portion axial direction with respect to the cover portion 121. That is, the inner diameter of the first through hole is slightly larger than the outer diameter of the small diameter portion 162, and a minute gap is set between the inner peripheral surface of the first through hole and the outer peripheral surface of the small diameter portion 162. Yes. Similarly, the outer diameter of the second washer 19 is slightly smaller than the inner diameter of the cover portion 121, and a minute gap is set between the outer peripheral surface of the second washer 19 and the inner peripheral surface of the cover portion 121. Yes. These minute gaps are set as small as possible within a range in which the washers 18 and 19 can move in the connecting portion axial direction, and are about 0.01 mm in this embodiment.

第１ワッシャ１８の外径は、第２ワッシャ１９の外径より小さくなっている。また、第２貫通穴の内径は、第１貫通穴の内径以上、第１ワッシャ１８の外径未満の範囲内になっている。   The outer diameter of the first washer 18 is smaller than the outer diameter of the second washer 19. In addition, the inner diameter of the second through hole is in the range of not less than the inner diameter of the first through hole and less than the outer diameter of the first washer 18.

本実施形態では、第１ワッシャ１８が２つ、第２ワッシャ１９が１つ設けられており、２つの第１ワッシャ１８間に１つの第２ワッシャ１９が配置されている。そして、第１、第２ワッシャ１８、１９により、迷路構造が形成されている。   In the present embodiment, two first washers 18 and one second washer 19 are provided, and one second washer 19 is disposed between the two first washers 18. A labyrinth structure is formed by the first and second washers 18 and 19.

ところで、蒸発側連結部１５１および凝縮側連結部１５２の配置方向を、以下、連結部配置方向とする。本実施形態では、連結部配置方向は蒸発側チューブ１１１の長手方向、すなわち鉛直方向に一致している。   By the way, the arrangement | positioning direction of the evaporation side connection part 151 and the condensation side connection part 152 is hereafter set as a connection part arrangement | positioning direction. In the present embodiment, the connecting portion arrangement direction coincides with the longitudinal direction of the evaporation side tube 111, that is, the vertical direction.

カバー部１２１と第１ワッシャ１８との間には、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０とダクト部１２０との熱膨張差、すなわち蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０の連結部配置方向の熱膨張量と、ダクト部１２０の連結部配置方向の熱膨張量との差を吸収するための隙間１７が設定されている。   Between the cover part 121 and the first washer 18, the difference in thermal expansion between the evaporation part 110 and the duct part 120 generated between the evaporation side connection part 151 and the condensation side connection part 152, that is, the evaporation side connection part 151 and the condensation. A gap 17 is formed to absorb the difference between the amount of thermal expansion in the connecting portion arrangement direction of the evaporator 110 and the amount of thermal expansion in the connecting portion arrangement direction of the duct portion 120 that occurs between the side connecting portions 152.

そして、この隙間１７の大きさ、すなわちカバー部１２１と第１ワッシャ１８との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離は、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０およびダクト部１２０の連結部配置方向の熱膨張に起因するカバー部１２１と各連結部１５１、１５２との隙間の変化量より大きく設定されている。換言すると、カバー部１２１と第１ワッシャ１８との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離は、蒸発側連結部１５１および凝縮側連結部１５２間において、蒸発部１１０とダクト部１２０との間で連結部配置方向に発生すると想定される熱膨張差より大きく設定されている。   The size of the gap 17, that is, the distance in the connecting portion arrangement direction between the cover portion 121 and the first washer 18, the distance farther from the other connecting portion is the evaporation side connecting portion 151 and the condensation side. It is set to be larger than the amount of change in the gap between the cover part 121 and the connecting parts 151 and 152 due to the thermal expansion in the connecting part arrangement direction of the evaporation part 110 and the duct part 120 generated between the connecting parts 152. In other words, of the distance in the connecting portion arrangement direction between the cover part 121 and the first washer 18, the distance farther from the other connecting portion is the evaporation between the evaporation side connecting portion 151 and the condensation side connecting portion 152. It is set larger than the thermal expansion difference assumed to occur in the connecting portion arrangement direction between the portion 110 and the duct portion 120.

本実施形態では、図２に示すように、カバー部１２１は、ダクト部１２０における蒸発側連結部１５１および凝縮側連結部１５２との接続部にそれぞれ設けられている。ここで、カバー部１２１のうち、ダクト部１２０における蒸発側連結部１５１との接続部に配置されるものを第１カバー部１２１ａといい、ダクト部１２０における凝縮側連結部１５２との接続部に配置されるものを第２カバー部１２１ｂという。そして、第１カバー部１２１ａと第１プレート１８との間の連結部配置方向における距離のうち、凝縮側連結部１５２から遠い側の距離Ｘ１と、第２カバー部１２１ｂと第１プレート１８との間の連結部配置方向における距離のうち、蒸発側連結部１５１から遠い側の距離Ｘ２との合計が、蒸発側連結部１５１および凝縮側連結部１５２間において、蒸発部１１０とダクト部１２０との間で連結部配置方向に発生すると想定される熱膨張差より大きく設定されている。   In the present embodiment, as shown in FIG. 2, the cover part 121 is provided at each connection part of the duct part 120 to the evaporation side connection part 151 and the condensation side connection part 152. Here, of the cover part 121, the cover part 121 arranged at the connection part with the evaporation side connection part 151 in the duct part 120 is referred to as a first cover part 121 a, and the connection part with the condensation side connection part 152 in the duct part 120. What is arranged is referred to as a second cover part 121b. And among the distance in the connection part arrangement | positioning direction between the 1st cover part 121a and the 1st plate 18, distance X1 of the side far from the condensation side connection part 152, and the 2nd cover part 121b and the 1st plate 18 Among the distances in the connecting portion arrangement direction between the evaporation side connecting portion 151 and the condensation side connecting portion 152, the sum of the distance X2 far from the evaporation side connecting portion 151 is between the evaporation portion 110 and the duct portion 120. It is set larger than the thermal expansion difference assumed to occur in the connecting portion arrangement direction.

具体的には、蒸発部１１０および各連結部１５１、１５２がオーステナイト系ステンレス（線膨張係数１８×１０−６）で構成され、ダクト部１２０およびカバー部１２１がフェライト系ステンレス（線膨張係数１２×１０−６）で構成されており、２つの連通部１５１、１５２間のピッチＹが４０ｍｍになっており、ダクト部１２０に排気ガスが流通する際に、蒸発部１１０が８００℃、ダクト部１２０が６００℃になる場合（基準温度を２５℃とする）、蒸発部１１０の熱膨張が０．５５８ｍｍ、ダクト部１２０の熱膨張が０．２７６ｍｍとなるため、その熱膨張差は０．２８２ｍｍとなる。したがって、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０およびダクト部１２０の連結部配置方向の熱膨張に起因するカバー部１２１と各連結部１５１、１５２との隙間の変化量は、０．２８２ｍｍとなる。このため、本実施形態では、第１カバー部１２１ａと第１プレート１８との間の連結部配置方向における距離のうち、凝縮側連結部１５２から遠い側の距離Ｘ１と、第２カバー部１２１ｂと第１プレート１８との間の連結部配置方向における距離のうち、蒸発側連結部１５１から遠い側の距離Ｘ２との合計は、０．２８２ｍｍより大きく設定されている。なお、２つの連結部１５１、１５２間のピッチＹとは、各連結部１５１、１５２の軸間距離のことをいう。 Specifically, the evaporating part 110 and the connecting parts 151 and 152 are made of austenitic stainless steel (linear expansion coefficient 18 × 10 −6 ), and the duct part 120 and the cover part 121 are made of ferritic stainless steel (linear expansion coefficient 12 × 10 −6 ), the pitch Y between the two communication portions 151 and 152 is 40 mm, and when the exhaust gas flows through the duct portion 120, the evaporation portion 110 is 800 ° C., the duct portion 120. Is 600 ° C. (reference temperature is 25 ° C.), the thermal expansion of the evaporation section 110 is 0.558 mm, and the thermal expansion of the duct section 120 is 0.276 mm, so the difference in thermal expansion is 0.282 mm. Become. Therefore, the change of the clearance gap between the cover part 121 and each connection part 151 and 152 resulting from the thermal expansion of the evaporation part 110 and the duct part 120 in the connection part arrangement direction generated between the evaporation side connection part 151 and the condensation side connection part 152. The amount is 0.282 mm. For this reason, in this embodiment, among the distances in the connecting portion arrangement direction between the first cover portion 121a and the first plate 18, the distance X1 farther from the condensation side connecting portion 152 and the second cover portion 121b Of the distances in the connecting portion arrangement direction between the first plate 18 and the distance X2 far from the evaporation side connecting portion 151, the total is set to be larger than 0.282 mm. The pitch Y between the two connecting portions 151 and 152 refers to the distance between the axes of the connecting portions 151 and 152.

ところで、上述したように、第１、第２ワッシャ１８、１９は、連結部軸方向に摺動可能になっている。このため、カバー部１２１の凝縮部１３０側の端部には、第１、第２ワッシャ１８、１９がカバー部１２１より凝縮部１３０側に移動することを規制する蓋部１２２が設けられている。   As described above, the first and second washers 18, 19 are slidable in the connecting portion axial direction. For this reason, the cover part 121 is provided with a cover part 122 that restricts the movement of the first and second washers 18 and 19 from the cover part 121 to the condensation part 130 side at the end part of the cover part 121 on the condensation part 130 side. .

具体的には、蓋部１２２は、カバー部１２１の凝縮部１３０側の端部からジョイント１６の小径部１６２に向かって延びる板状に形成されている。そして、蓋部１２２と小径部１６２の外周面との間には、隙間１２３が形成されている。この隙間１２３の連結部配置方向外側の長さは、カバー部１２１と第１ワッシャ１８との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離以上、第１ワッシャ１８の外径未満の範囲内になっている。なお、蓋部１２２はカバー部１２１と別体として構成されており、排熱回収器１００の製造時において、カバー部１２１内に第１、第２ワッシャ１８、１９を圧入（挿入）した後に、カバー部１２１の先端部に一体にろう付けされるようになっている。そして、排熱回収器１００の作動時には、ダクト部１２０内の排気ガスの圧力により第１、第２ワッシャ１８、１９は蓋部１２２に押しつけられるようになっている。   Specifically, the cover part 122 is formed in a plate shape extending from the end part of the cover part 121 on the condensation part 130 side toward the small diameter part 162 of the joint 16. A gap 123 is formed between the lid portion 122 and the outer peripheral surface of the small diameter portion 162. The length of the gap 123 on the outer side in the connecting portion arrangement direction is equal to or more than the distance on the side farther from the other connecting portion in the connecting portion arrangement direction between the cover portion 121 and the first washer 18. It is within the range of less than the outer diameter. The cover part 122 is configured as a separate body from the cover part 121, and after the first and second washers 18 and 19 are press-fitted (inserted) into the cover part 121 when the exhaust heat recovery device 100 is manufactured, The cover portion 121 is brazed integrally with the tip portion. When the exhaust heat recovery device 100 is operated, the first and second washers 18 and 19 are pressed against the lid portion 122 by the pressure of the exhaust gas in the duct portion 120.

また、本実施形態では、図３に示すように、第２ワッシャ１９と各連結部１５１、１５２との間には、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０とダクト部１２０との熱膨張差を吸収するための隙間１７０が設定されている。この隙間１７０の大きさ、すなわち第２ワッシャ１９と各連結部１５１、１５２との間の連結部配置方向における距離のうち、他方の連結部から遠い側の距離Ｚが、蒸発側連結部１５１および凝縮側連結部１５２間において、蒸発部１１０とダクト部１２０との間で連結部配置方向に発生する熱膨張に起因するカバー部１２１と各連結部１５１、１５２との隙間の変化量より大きく設定されている。   Further, in the present embodiment, as shown in FIG. 3, between the second washer 19 and each of the connection parts 151 and 152, the evaporation part 110 generated between the evaporation side connection part 151 and the condensation side connection part 152, and A gap 170 for absorbing a difference in thermal expansion from the duct portion 120 is set. Of the distance 170 in the connecting portion arrangement direction between the second washer 19 and each connecting portion 151, 152, the distance Z far from the other connecting portion is the evaporation side connecting portion 151 and the size of the gap 170. Between the condensing side connection parts 152, it sets larger than the variation | change_quantity of the clearance gap between the cover part 121 and each connection part 151 and 152 resulting from the thermal expansion which generate | occur | produces in the connection part arrangement | positioning direction between the evaporation part 110 and the duct part 120. Has been.

ところで、ダクト部１２０内に排気ガスが流通すると、ダクト部１２０および蒸発部１１０が熱膨張し、ダクト部１２０と一体に形成されているカバー部１２１と、蒸発部１１０に熱的に接続されている２つの連結部１５１、１５２とが、連結部配置方向外側（各連結部１５１、１５２同士が離れる方向、すなわち他の連結部から遠ざかる方向）にそれぞれ変位する。このとき、外部に露出しているダクト部１２０と、外部に露出していない蒸発部１１０とでは熱膨張量が異なる、すなわちダクト部１２０と蒸発部１１０との間に熱膨張差が発生するため、カバー部１２１と各連結部１５１、１５２との連結部配置方向外側の隙間が減少する。そして、カバー部１２１と各連結部１５１、１５２との隙間が０になり、カバー部１２１と各連結部１５１、１５２とが接触すると、その接触部に熱応力が発生する。   By the way, when the exhaust gas flows through the duct part 120, the duct part 120 and the evaporation part 110 are thermally expanded, and are thermally connected to the cover part 121 formed integrally with the duct part 120 and the evaporation part 110. The two connecting portions 151 and 152 are displaced outward in the connecting portion arrangement direction (a direction in which the connecting portions 151 and 152 are separated from each other, that is, a direction away from the other connecting portions). At this time, the duct portion 120 exposed to the outside and the evaporation portion 110 not exposed to the outside have different thermal expansion amounts, that is, a difference in thermal expansion occurs between the duct portion 120 and the evaporation portion 110. The gap on the outer side in the connecting portion arrangement direction between the cover 121 and the connecting portions 151 and 152 decreases. And when the clearance gap between the cover part 121 and each connection part 151 and 152 becomes 0 and the cover part 121 and each connection part 151 and 152 contact, a thermal stress will generate | occur | produce in the contact part.

これに対し、本実施形態のように、カバー部１２１と第１ワッシャ１８との間に、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０とダクト部１２０との連結部配置方向の熱膨張差を吸収するための隙間１７を設定することで、ダクト部１２０と蒸発部１１０との間の熱膨張差によりカバー部１２１と各連結部１５１、１５２との隙間が減少したときに、カバー部１２１と第１ワッシャ１８とが接触することを防止できる。したがって、ダクト部１２０と蒸発部１１０との熱膨張差に起因する熱応力の発生を抑制することができる。   On the other hand, as in the present embodiment, a connecting portion between the evaporation portion 110 and the duct portion 120 generated between the evaporation side connecting portion 151 and the condensation side connecting portion 152 between the cover portion 121 and the first washer 18. By setting the gap 17 for absorbing the thermal expansion difference in the arrangement direction, the gap between the cover part 121 and each of the connecting parts 151 and 152 is reduced due to the thermal expansion difference between the duct part 120 and the evaporation part 110. Sometimes, the cover portion 121 and the first washer 18 can be prevented from contacting each other. Therefore, the generation of thermal stress due to the difference in thermal expansion between the duct part 120 and the evaporation part 110 can be suppressed.

また、第１、第２ワッシャ１８、１９により、カバー部１２１と各連結部１５１、１５２間の隙間に迷路構造を構成することで、カバー部１２１と各連結部１５１、１５２間の隙間からダクト部１２０の外部に排気ガスが流出することを抑制できる。したがって、排気ガスのシール性を確保しつつ、熱応力を緩和することが可能となる。   Further, the first and second washers 18 and 19 form a labyrinth structure in the gap between the cover portion 121 and each of the connecting portions 151 and 152, so that the duct is formed from the gap between the cover portion 121 and each of the connecting portions 151 and 152. The exhaust gas can be prevented from flowing out of the portion 120. Therefore, it is possible to alleviate the thermal stress while ensuring the exhaust gas sealing performance.

また、第２ワッシャ１９と各連結部１５１、１５２との間に、蒸発側連結部１５１および凝縮側連結部１５２間において発生する蒸発部１１０とダクト部１２０との連結部配置方向の熱膨張差を吸収するための隙間１７０を設定することで、ダクト部１２０と蒸発部１１０との間の熱膨張差によりカバー部１２１と各連結部１５１、１５２との隙間が減少したときに、第２ワッシャ１９の貫通穴と各連結部１５１、１５２とが接触することを防止できる。したがって、ダクト部１２０と蒸発部１１０との熱膨張差に起因する熱応力の発生をより抑制することが可能となる。   Further, between the second washer 19 and each of the connecting portions 151 and 152, a difference in thermal expansion in the connecting portion arrangement direction between the evaporation portion 110 and the duct portion 120 generated between the evaporation side connecting portion 151 and the condensation side connecting portion 152. When the gap 170 between the cover part 121 and each of the connecting parts 151 and 152 is reduced due to the difference in thermal expansion between the duct part 120 and the evaporation part 110, the second washer is set. It can prevent that 19 through-holes and each connection part 151 and 152 contact. Therefore, it is possible to further suppress the generation of thermal stress due to the difference in thermal expansion between the duct part 120 and the evaporation part 110.

また、カバー部１２１の端部に蓋部１２２を設けることで、第１、第２ワッシャ１８、１９がカバー部１２１より凝縮部１３０側に移動することを規制することができる。さらに、第１、第２ワッシャ１８、１９の各貫通穴の内径を、ジョイント１６の大径部１６１の外径より小さく形成することで、第１、第２ワッシャ１８、１９が蒸発部１１０側に移動することを規制することができる。これらにより、第１、第２ワッシャ１８、１９を、カバー部１２１と小径部１６２との隙間に確実に配置することができる。このため、排気ガスのシール性を確実に確保しつつ、熱応力を確実に緩和することが可能となる。   Moreover, by providing the cover part 122 at the end part of the cover part 121, it is possible to restrict the first and second washers 18 and 19 from moving toward the condensing part 130 from the cover part 121. Further, by forming the inner diameter of each through hole of the first and second washers 18 and 19 to be smaller than the outer diameter of the large-diameter portion 161 of the joint 16, the first and second washers 18 and 19 are on the evaporation unit 110 side. Can be restricted from moving to. Thus, the first and second washers 18 and 19 can be reliably arranged in the gap between the cover portion 121 and the small diameter portion 162. For this reason, it is possible to surely relieve the thermal stress while ensuring the sealing performance of the exhaust gas.

（他の実施形態）
なお、上記実施形態では、第１、第２プレートとしてリング状の第１、第２ワッシャ１８、１９を採用しているが、これに限らず、第１、第２プレートとしては、楕円状や多角形状のプレートを採用してもよい。 (Other embodiments)
In the above embodiment, the first and second washers 18 and 19 in the ring shape are employed as the first and second plates. However, the present invention is not limited to this, and the first and second plates may be elliptical or A polygonal plate may be employed.

また、上記実施形態では、第１、第２ワッシャ１８、１９の合計数を３つとしたが、各ワッシャ１８、１９がそれぞれ１つ以上であれば、他の数に変更してもよい。   In the above embodiment, the total number of the first and second washers 18 and 19 is three. However, as long as each of the washers 18 and 19 is one or more, the number may be changed to another number.

また、上記実施形態では、カバー部１２１を、ダクト部１２０における蒸発側連結部１５１および凝縮側連結部１５２との接続部にそれぞれ設けた例について説明したが、これに限らず、ダクト部１２０における蒸発側連結部１５１および凝縮側連結部１５２のうちいずれか一方との接続部にのみ設けてもよい。   Moreover, although the said embodiment demonstrated the example which each provided the cover part 121 in the connection part with the evaporation side connection part 151 and the condensation side connection part 152 in the duct part 120, it is not restricted to this, In the duct part 120 You may provide only in the connection part with either one of the evaporation side connection part 151 and the condensation side connection part 152. FIG.

また、上記実施形態では、被加熱流体として冷却水を採用しているが、被加熱流体としては、エンジンオイル、車両オートマチックトランスミッション用のトルクコンバータ内のオイル等を採用してもよい。   Moreover, in the said embodiment, although cooling water is employ | adopted as a to-be-heated fluid, engine oil, the oil in the torque converter for vehicle automatic transmissions, etc. may be employ | adopted as a to-be-heated fluid.

また、上記実施形態では、２つの連通部１５１、１５２間のピッチＹを４０ｍｍとした例について説明したが、第１、第２ワッシャ１８、１９の寸法を小型化するために、ピッチＹをさらに狭く設定してもよい。   In the above embodiment, the example in which the pitch Y between the two communication portions 151 and 152 is 40 mm has been described. However, in order to reduce the size of the first and second washers 18 and 19, the pitch Y is further increased. You may set narrowly.

本発明の実施形態に係る排熱回収器１００の車両への搭載状態を示す模式図である。It is a schematic diagram which shows the mounting state to the vehicle of the exhaust heat recovery device 100 which concerns on embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２のＢ部拡大図である。It is the B section enlarged view of FIG.

符号の説明Explanation of symbols

１７…隙間、１８…第１ワッシャ（第１プレート）、１９…第２ワッシャ（第２プレート）、１１０…蒸発部、１２０…ダクト部（筐体）、１２１…カバー部、１３０…凝縮部、１５１…蒸発側連結部、１５２…凝縮側連結部。   17 ... Gap, 18 ... First washer (first plate), 19 ... Second washer (second plate), 110 ... Evaporation part, 120 ... Duct part (housing), 121 ... Cover part, 130 ... Condensation part, 151 ... Evaporation side connection part, 152 ... Condensation side connection part.

Claims (7)

加熱流体が流通する筐体（１２０）内に配置され、前記加熱流体と内部に封入された蒸発および凝縮可能な作動流体との間で熱交換を行い、前記作動流体を蒸発させる蒸発部（１１０）と、
被加熱流体が流通する被加熱流体経路内に配置され、前記蒸発部（１１０）で蒸発した前記作動流体と前記被加熱流体との間で熱交換を行い、前記作動流体を凝縮させる凝縮部（１３０）と、
前記蒸発部（１１０）で蒸発した前記作動流体を前記凝縮部（１３０）に導く蒸発側連結部（１５１）と、
前記凝縮部（１３０）で凝縮した前記作動流体を前記蒸発部（１１０）に導く凝縮側連結部（１５２）とを備える排熱回収器であって、
前記筐体（１２０）における前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）のうち少なくとも一方との接続部には、当該少なくとも一方の連結部（１５１、１５２）の外周面を覆うカバー部（１２１）が、前記筐体（１２０）と一体に形成されており、
前記少なくとも一方の連結部（１５１、１５２）と前記カバー部（１２２）との間に設定された隙間には、前記少なくとも一方の連結部（１５１、１５２）が挿入される貫通穴を有する第１、第２プレート（１８、１９）が設けられており、
前記第１プレート（１８）は前記少なくとも一方の連結部（１５１、１５２）に対して摺動可能になっているとともに、前記第２プレート（１９）は前記カバー部（１２１）に対して摺動可能になっており、
前記第１プレート（１８）の外径は、前記第２プレート（１９）の外径より小さくなっているとともに、前記第２プレート（１９）の前記貫通穴の内径は、前記第１プレート（１８）の前記貫通穴の内径以上、前記第１プレート（１８）の外径未満の範囲内になっており、
前記カバー部（１２１）と前記第１プレート（１８）との間には、前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）間において発生する前記蒸発部（１１０）と前記筐体（１２０）との熱膨張差を吸収するための隙間（１７）が設定されており、
前記第１、第２プレート（１８、１９）により迷路構造が構成されていることを特徴とする排熱回収器。 An evaporating section (110) that is disposed in a casing (120) through which the heated fluid flows, exchanges heat between the heated fluid and the working fluid that can be evaporated and condensed, and evaporates the working fluid. )When,
A condensing unit (condensed) that is disposed in a heated fluid path through which the heated fluid flows, exchanges heat between the working fluid evaporated by the evaporation unit (110) and the heated fluid, and condenses the working fluid. 130),
An evaporation side connecting portion (151) for guiding the working fluid evaporated in the evaporation portion (110) to the condensing portion (130);
A waste heat recovery device comprising a condensing side connection part (152) for guiding the working fluid condensed in the condensing part (130) to the evaporation part (110),
An outer peripheral surface of the at least one connecting portion (151, 152) is connected to at least one of the evaporation side connecting portion (151) and the condensation side connecting portion (152) in the housing (120). A cover portion (121) for covering is formed integrally with the casing (120),
A gap formed between the at least one connecting portion (151, 152) and the cover portion (122) has a first through hole into which the at least one connecting portion (151, 152) is inserted. A second plate (18, 19) is provided,
The first plate (18) is slidable with respect to the at least one connecting portion (151, 152), and the second plate (19) is slidable with respect to the cover portion (121). Is possible,
The outer diameter of the first plate (18) is smaller than the outer diameter of the second plate (19), and the inner diameter of the through hole of the second plate (19) is the same as that of the first plate (18). ) In the range of not less than the inner diameter of the through hole and less than the outer diameter of the first plate (18),
Between the cover part (121) and the first plate (18), the evaporation part (110) generated between the evaporation side connection part (151) and the condensation side connection part (152) and the housing. A gap (17) for absorbing the difference in thermal expansion from the body (120) is set,
A muffler structure is constituted by the first and second plates (18, 19). 前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）の配置方向を連結部配置方向としたとき、
前記カバー部（１２１）と前記第１プレート（１８）との間の前記連結部配置方向における距離のうち、他方の前記連結部から遠い側の距離が、前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）間において発生する前記蒸発部（１１０）および前記筐体（１２０）の前記連結部配置方向の熱膨張に起因する前記カバー部（１２１）と前記少なくとも一方の連結部（１５１、１５２）との隙間の変化量より大きく設定されていることを特徴とする請求項１に記載の排熱回収器。 When the arrangement direction of the evaporation side connection part (151) and the condensation side connection part (152) is the connection part arrangement direction,
Of the distance in the connecting portion arrangement direction between the cover portion (121) and the first plate (18), the distance on the side farther from the other connecting portion is the evaporation side connecting portion (151) and the first plate (18). The cover portion (121) and the at least one connection portion (at least one of the evaporation portion (110) and the casing (120) generated between the condensation side connection portions (152) due to thermal expansion in the connection portion arrangement direction ( 151, 152). The exhaust heat recovery device according to claim 1, wherein the exhaust heat recovery device is set to be larger than an amount of change in a gap between the exhaust heat recovery device 151 and 152). 前記第２プレート（１９）と前記少なくとも一方の連結部（１５１、１５２）との間には、前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）間において発生する前記蒸発部（１１０）と前記筐体（１２０）との熱膨張差を吸収するための隙間（１７０）が設定されていることを特徴とする請求項１または２に記載の排熱回収器 Between the second plate (19) and the at least one connection part (151, 152), the evaporation part (between the evaporation side connection part (151) and the condensation side connection part (152)) The exhaust heat recovery device according to claim 1 or 2, wherein a gap (170) for absorbing a difference in thermal expansion between the housing (120) and the housing (120) is set. 前記第２プレート（１９）と前記少なくとも一方の連結部（１５１、１５２）との間の前記連結部配置方向における距離のうち、他方の前記連結部から遠い側の距離（Ｚ）が、前記蒸発側連結部（１５１）および前記凝縮側連結部（１５２）間において、前記蒸発部（１１０）と前記筐体（１２０）との間で前記連結部配置方向に発生する熱膨張に起因する前記カバー部（１２１）と前記少なくとも一方の連結部（１５１、１５２）との隙間の変化量より大きく設定されていることを特徴とする請求項３に記載の排熱回収器。 Of the distance in the connecting portion arrangement direction between the second plate (19) and the at least one connecting portion (151, 152), the distance (Z) far from the other connecting portion is the evaporation. The cover caused by thermal expansion that occurs in the connecting portion arrangement direction between the evaporation portion (110) and the housing (120) between the side connecting portion (151) and the condensation side connecting portion (152). The exhaust heat recovery device according to claim 3, wherein the exhaust heat recovery device is set to be larger than a change amount of a gap between the portion (121) and the at least one connecting portion (151, 152). 前記カバー部（１２１）には、前記第１、第２プレート（１８、１９）が前記カバー部（１２１）より前記凝縮部（１３０）側に移動することを規制する蓋部（１２２）が設けられていることを特徴とする請求項１ないし４のいずれか１つに記載の排熱回収器。 The cover part (121) is provided with a lid part (122) for restricting the first and second plates (18, 19) from moving toward the condensing part (130) from the cover part (121). The exhaust heat recovery device according to any one of claims 1 to 4, wherein the exhaust heat recovery device is provided. 前記少なくとも一方の連結部（１５１、１５２）と前記カバー部（１２２）との間に設定された隙間には、２つの前記第１プレート（１８）および１つの前記第２プレート（１９）が設けられており、
前記１つの第２プレート（１９）が、前記２つの第１プレート（１８）間に配置されていることを特徴とする請求項１ないし５のいずれか１つに記載の排熱回収器。 In the gap set between the at least one connecting portion (151, 152) and the cover portion (122), two first plates (18) and one second plate (19) are provided. And
The exhaust heat recovery device according to any one of claims 1 to 5, wherein the one second plate (19) is disposed between the two first plates (18). 前記少なくとも一方の連結部（１５１、１５２）と前記蒸発部（１１０）とを接続するジョイント（１６）を備え、
前記ジョイント（１６）は、前記蒸発部（１１０）側に大径部（１６１）、前記少なくとも一方の連結部（１５１、１５２）側に小径部（１６２）を有しており、
前記第１、第２プレート（１８、１９）は、前記小径部（１６２）と前記カバー部（１２２）との間の隙間に設けられており、
前記第１、第２プレート（１８、１９）の前記貫通穴の内径は、前記大径部（１６１）の外径より小さく形成されていることを特徴とする請求項１ないし６のいずれか１つに記載の排熱回収器。 A joint (16) for connecting the at least one coupling part (151, 152) and the evaporation part (110);
The joint (16) has a large diameter part (161) on the evaporation part (110) side and a small diameter part (162) on the at least one connection part (151, 152) side,
The first and second plates (18, 19) are provided in a gap between the small diameter portion (162) and the cover portion (122),
The inner diameter of the through hole of the first and second plates (18, 19) is formed smaller than the outer diameter of the large diameter portion (161). Exhaust heat recovery unit described in 1.
JP2007232525A 2007-09-07 2007-09-07 Exhaust heat recovery unit Withdrawn JP2009062915A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013148231A1 (en) * 2012-03-30 2013-10-03 Thermo King Corporation Transport refrigeration system
JP2016210413A (en) * 2015-05-12 2016-12-15 ベンテラー・アウトモビールテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Motor vehicle heat exchanger system
JP2016211840A (en) * 2015-05-12 2016-12-15 ベンテラー・アウトモビールテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Automobile heat exchanger system
CN108730000A (en) * 2017-04-18 2018-11-02 丰田自动车株式会社 Heat extraction recover

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013148231A1 (en) * 2012-03-30 2013-10-03 Thermo King Corporation Transport refrigeration system
CN104271374A (en) * 2012-03-30 2015-01-07 冷王公司 Transport refrigeration system
JP2016210413A (en) * 2015-05-12 2016-12-15 ベンテラー・アウトモビールテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Motor vehicle heat exchanger system
JP2016211840A (en) * 2015-05-12 2016-12-15 ベンテラー・アウトモビールテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Automobile heat exchanger system
US10309348B2 (en) 2015-05-12 2019-06-04 Benteler Automobiltechnik Gmbh Motor vehicle heat exchanger system
CN108730000A (en) * 2017-04-18 2018-11-02 丰田自动车株式会社 Heat extraction recover
US10563558B2 (en) 2017-04-18 2020-02-18 Toyota Jidosha Kabushiki Kaisha Exhaust heat recovery unit
CN108730000B (en) * 2017-04-18 2020-09-29 丰田自动车株式会社 Heat extraction recoverer

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