JP2009030569A - Exhaust heat recovery device - Google Patents

Exhaust heat recovery device Download PDF

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JP2009030569A
JP2009030569A JP2007197374A JP2007197374A JP2009030569A JP 2009030569 A JP2009030569 A JP 2009030569A JP 2007197374 A JP2007197374 A JP 2007197374A JP 2007197374 A JP2007197374 A JP 2007197374A JP 2009030569 A JP2009030569 A JP 2009030569A
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valve body
heat recovery
flow path
exhaust heat
exhaust
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Tomoyuki Suzuki
友行 鈴木
Yoshinobu Nagata
好伸 永田
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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    • 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
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain an exhaust heat recovery device with a switch valve capable of switching a flow path with a simple constitution. <P>SOLUTION: This device comprises a bypass flow path 26 for introducing exhaust gas from an upstream side to a downstream side, and an exhaust heat recovery flow path 28 for exchanging heats of the exhaust gas from the upstream side between it and a heat exchanging medium and introducing it to the downstream side. A switch valve 32 is provided for switching from the bypass flow path 26 or the exhaust heat recovery flow path 28 to a downstream exhaust flow path. The switch valve 32 comprises a first valve element 34 supported swingably around a swing shaft 36 and releasing/blocking the bypass flow path 26, and a second valve element 40 releasing/blocking the exhaust heat recovery flow path 28. The second valve element 40 is engaged with the first valve element 34 swingably with the swing of the first valve element 34, and the second valve element 40 is swung together with the release of the bypass flow path 26 by the swing of the first valve element 34 so as to block the exhaust heat recovery flow path 28. By the further swing of the first valve element 34, the second valve element 40 maintains the blocking condition of the exhaust heat recovery flow path 28. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、内燃機関からの排気流路に介装され、排気ガスと熱交換媒体との間で熱交換を行い排気熱を回収する排気熱回収装置に関する。   The present invention relates to an exhaust heat recovery apparatus that is interposed in an exhaust passage from an internal combustion engine and recovers exhaust heat by exchanging heat between exhaust gas and a heat exchange medium.

従来より、特許文献１にあるように、排気流路に介装され、内燃機関からの排気ガスと内燃機関の冷却水等の熱交換媒体との間で熱交換を行う排気熱回収装置が知られている。
このような排気熱回収装置では、上流側の排気流路からの排気ガスを下流側の排気流路に導くバイパス流路と、上流側の排気流路からの排気ガスを熱交換媒体との間で熱交換を行って下流側の排気流路に導く排気熱回収流路とを備えている。上流側の排気流路からバイパス流路を通って下流側の排気流路へ流し、または上流側の排気流路から排気熱回収流路を通って下流側の排気流路へ流すかを切り換える切換バルブを設けて、内燃機関の運転状態に応じて、排気ガスの流れを切り換えるようにしている。
特開２００４−２４５１２７号公報（第３実施例、図３） Conventionally, as disclosed in Patent Document 1, there is known an exhaust heat recovery device that is interposed in an exhaust passage and performs heat exchange between an exhaust gas from an internal combustion engine and a heat exchange medium such as cooling water of the internal combustion engine. It has been.
In such an exhaust heat recovery apparatus, the exhaust gas from the upstream exhaust flow path is led to the downstream exhaust flow path, and the exhaust gas from the upstream exhaust flow path is connected to the heat exchange medium. And an exhaust heat recovery passage that conducts heat exchange and guides it to the downstream exhaust passage. Switch between switching from the upstream exhaust flow path to the downstream exhaust flow path through the bypass flow path, or from the upstream exhaust flow path to the downstream exhaust flow path through the exhaust heat recovery flow path A valve is provided to switch the flow of exhaust gas according to the operating state of the internal combustion engine.
Japanese Unexamined Patent Publication No. 2004-245127 (Third Example, FIG. 3)

しかしながら、こうした従来のものでは、切換バルブがバタフライバルブで、２つの板状の弁体を９０度位相を異ならせて揺動軸に取り付けて、揺動軸を９０度揺動させることにより、上流側の排気流路からバイパス流路を通って下流側の排気流路へ流し、または上流側の排気流路から排気熱回収流路を通って下流側の排気流路へ流すかを切り換えるようにしている。   However, in such a conventional valve, the switching valve is a butterfly valve, and the two plate-like valve bodies are attached to the swinging shaft with a phase difference of 90 degrees, and the swinging shaft is swung by 90 degrees. Switching from the side exhaust flow path through the bypass flow path to the downstream exhaust flow path, or from the upstream exhaust flow path through the exhaust heat recovery flow path to the downstream exhaust flow path ing.

このため、９０度の一定角度揺動させたときにのみ、一方の流路が開放され他方の流路が遮断されて、流路が完全に切り換えられるので、揺動軸を一定角度揺動するアクチュエータを用いて切り換えるように構成しなければならず、アクチュエータにステップモータやＤＣモータを用いて回転を制御するか、アクチュエータにシリンダを用いてストッパに突き当てるように構成する等しなければならず、装置が複雑になるという問題があった。   For this reason, only when the rocking is performed at a constant angle of 90 degrees, one channel is opened and the other channel is shut off, and the channel is completely switched. It must be configured to switch using an actuator, and the actuator must be configured to control rotation using a step motor or DC motor, or be configured to abut against a stopper using a cylinder for the actuator, etc. There was a problem that the device became complicated.

本発明の課題は、簡単な構成で流路を切り換えることができる切換バルブを備えた排気熱回収装置を提供することにある。   The subject of this invention is providing the exhaust heat recovery apparatus provided with the switching valve which can switch a flow path by simple structure.

かかる課題を達成すべく、本発明は課題を解決するため次の手段を取った。即ち、
内燃機関からの排気流路に介装され、上流側の前記排気流路からの排気ガスを下流側の前記排気流路に導くバイパス流路と、上流側の前記排気流路からの排気ガスを熱交換媒体との間で熱交換を行って下流側の前記排気流路に導く排気熱回収流路とを備えた排気熱回収装置において、
前記バイパス流路または前記排気熱回収流路から下流側の前記排気流路へ前記排気ガスの流れを切り換える切換バルブを設け、
前記切換バルブは揺動軸の廻りに揺動可能に支持され前記バイパス流路を開放・遮断する第１弁体を備えると共に、前記排気熱回収流路を開放・遮断する第２弁体を備え、
前記第１弁体の揺動と共に揺動可能に前記第２弁体を前記第１弁体に係合し、前記第１弁体の揺動による前記バイパス流路の開放と共に、前記第２弁体が揺動して前記排気熱回収流路を遮断し、かつ、前記第１弁体の更なる揺動により前記第２弁体は前記排気熱回収流路の遮断状態を維持することを特徴とする排気熱回収装置がそれである。その際、前記第１弁体は付勢部材により遮断方向に付勢されると共に、前記排気ガスの作用力を開放方向に受ける構成でもよい。あるいは、前記切換バルブは、アクチュエータにより前記第１弁体を揺動させる構成でもよい。 In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
A bypass passage that is interposed in an exhaust passage from the internal combustion engine and guides exhaust gas from the upstream exhaust passage to the exhaust passage on the downstream side, and exhaust gas from the upstream exhaust passage. In an exhaust heat recovery apparatus comprising an exhaust heat recovery flow path that conducts heat exchange with a heat exchange medium and leads to the exhaust flow path on the downstream side,
A switching valve for switching the flow of the exhaust gas from the bypass flow path or the exhaust heat recovery flow path to the exhaust flow path downstream;
The switching valve includes a first valve body that is swingably supported around a swing shaft and opens and closes the bypass flow path, and a second valve body that opens and closes the exhaust heat recovery flow path. ,
The second valve body is engaged with the first valve body so as to be capable of swinging together with the swinging of the first valve body, and the bypass valve is opened by the swinging of the first valve body. A body swings to shut off the exhaust heat recovery flow path, and the second valve body maintains the shut off state of the exhaust heat recovery flow path by further swinging of the first valve body. This is the exhaust heat recovery device. At this time, the first valve body may be urged in the blocking direction by the urging member and receive the action force of the exhaust gas in the opening direction. Alternatively, the switching valve may be configured to swing the first valve body by an actuator.

また、前記第２弁体は前記揺動軸を中心とする湾曲管状に形成されると共に、前記第２弁体の一端が前記第１弁体に取り付けられ、前記第１弁体の揺動により前記第２弁体の他端が前記排気熱回収流路の開口へ進退して前記排気熱回収流路を開放・遮断する構成としてもよい。あるいは、前記第２弁体は前記揺動軸を中心とする円弧板状に形成されると共に、前記第２弁体の一端が前記第１弁体に取り付けられ、前記第１弁体の揺動により前記第２弁体の他端が前記揺動軸から放射方向に配置した前記排気熱回収流路の開口を開放・閉塞して前記排気熱回収流路を開放・遮断する構成としてもよい。更に、前記第２弁体は前記第１弁体に弾性係合され、前記第１弁体の揺動により前記第２弁体が前記排気熱回収流路を開放・遮断し、かつ、前記バイパス流路の開放方向への前記第１弁体の更なる揺動により弾性変形して前記第２弁体が前記排気熱回収流路の遮断状態を維持する構成としてもよい。   In addition, the second valve body is formed in a curved tubular shape centering on the swing shaft, and one end of the second valve body is attached to the first valve body. The other end of the second valve body may be configured to open / close the exhaust heat recovery flow path by moving forward and backward to the opening of the exhaust heat recovery flow path. Alternatively, the second valve body is formed in an arc plate shape centered on the swing shaft, and one end of the second valve body is attached to the first valve body, and the swing of the first valve body is performed. Accordingly, the exhaust heat recovery passage may be opened and closed by opening / closing the opening of the exhaust heat recovery passage where the other end of the second valve body is disposed radially from the swing shaft. Further, the second valve body is elastically engaged with the first valve body, and the second valve body opens and closes the exhaust heat recovery flow path by the swinging of the first valve body, and the bypass The second valve body may be elastically deformed by further swinging of the first valve body in the opening direction of the flow path to maintain the shut-off state of the exhaust heat recovery flow path.

本発明の排気熱回収装置は、第１弁体の揺動と共に揺動可能に第２弁体を第１弁体に係合し、第１弁体の揺動によるバイパス流路の開放と共に、第２弁体が揺動して排気熱回収流路を遮断し、かつ、第１弁体の更なる揺動により第２弁体は排気熱回収流路の遮断状態を維持するので、簡単な構成の切換バルブで流路を切り換えることができるという効果を奏する。   The exhaust heat recovery device of the present invention engages the second valve body with the first valve body so that the first valve body swings together with the swing of the first valve body, and opens the bypass flow path by swinging the first valve body. Since the second valve body swings to block the exhaust heat recovery flow path, and the second valve body maintains the cut-off state of the exhaust heat recovery flow path by further swinging of the first valve body, There is an effect that the flow path can be switched by the switching valve of the configuration.

第１弁体は付勢部材により遮断方向に付勢されると共に、排気ガスの作用力を開放方向に受けることにより、排気ガスの作用力で、切換バルブを切り換えることができ、アクチュエータを設けなくてもよい。また、切換バルブが、アクチュエータにより第１弁体を揺動させるように構成すると、アクチュエータは一定の揺動角度で揺動制御するような複雑なものでなくてもよい。   The first valve body is urged in the shut-off direction by the urging member, and the switching valve can be switched by the action force of the exhaust gas by receiving the action force of the exhaust gas in the opening direction, and no actuator is provided. May be. Further, when the switching valve is configured to swing the first valve body by the actuator, the actuator may not be complicated so as to control the swing at a constant swing angle.

第２弁体を揺動軸を中心とする湾曲管状に形成すると、第１弁体の更なる揺動により第２弁体が排気熱回収流路の遮断状態を維持する構成を容易に取ることができる。また、第２弁体を揺動軸を中心とする円弧板状に形成することによっても、第１弁体の更なる揺動により第２弁体が排気熱回収流路の遮断状態を維持する構成を容易に取ることができる。更に、第２弁体を第１弁体に弾性係合させることによっても、第１弁体の更なる揺動により第２弁体が排気熱回収流路の遮断状態を維持する構成を容易に取ることができる。   When the second valve body is formed in a curved tubular shape around the swing shaft, the second valve body can be easily configured to maintain the shut-off state of the exhaust heat recovery flow path by further swinging of the first valve body. Can do. Further, by forming the second valve body in the shape of an arc plate centered on the swing axis, the second valve body maintains the shut-off state of the exhaust heat recovery flow path by further swinging of the first valve body. The configuration can be taken easily. Furthermore, the second valve body can be easily engaged with the first valve body by the second valve body being elastically engaged so that the second valve body maintains the shut-off state of the exhaust heat recovery flow path by further swinging of the first valve body. Can be taken.

以下本発明を実施するための最良の形態を図面に基づいて詳細に説明する。
図１，図２に示すように、１は排気熱回収装置で、排気熱回収装置１はシェル部材２を備え、シェル部材２は、箱状に形成された２つの部材を突き合わせて形成された、いわゆる最中構造により形成されている。シェル部材２の外形は、ほぼ直方体状に形成されると共に、一部に切欠部４が形成されて、内部がほぼＣ字の中空状に形成されている。 The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
As shown in FIGS. 1 and 2, reference numeral 1 denotes an exhaust heat recovery device, the exhaust heat recovery device 1 includes a shell member 2, and the shell member 2 is formed by abutting two members formed in a box shape. The so-called middle structure is formed. The outer shape of the shell member 2 is formed in a substantially rectangular parallelepiped shape, and a notch 4 is formed in a part thereof, and the inside is formed in a substantially C-shaped hollow shape.

切欠部４をつないで、シェル部材２の内に熱回収器６が配置されている。シェル部材２には、入口孔８と出口孔１０とが対向して形成されており、入口孔８には流入管１２が挿入されている。流入管１２はシェル部材２の入口孔８から外部に飛び出しており、流入管１２には図示しない上流側の排気流路が接続される。シェル部材２内の流入管１２の先端の開口１３は、出口孔１０の近傍にほぼ対向するように配置されている。出口孔１０の周囲のシェル部材２は管状に突き出され、出口孔１０に図示しない下流側の排気流路が接続されて、排気熱回収装置１が図示しない排気流路に介装されている。   A heat recovery device 6 is arranged in the shell member 2 by connecting the notches 4. In the shell member 2, an inlet hole 8 and an outlet hole 10 are formed to face each other, and an inlet pipe 12 is inserted into the inlet hole 8. The inflow pipe 12 protrudes outside from the inlet hole 8 of the shell member 2, and an upstream exhaust passage (not shown) is connected to the inflow pipe 12. The opening 13 at the tip of the inflow pipe 12 in the shell member 2 is disposed so as to face the vicinity of the outlet hole 10. The shell member 2 around the outlet hole 10 protrudes in a tubular shape, a downstream exhaust passage (not shown) is connected to the outlet hole 10, and the exhaust heat recovery device 1 is interposed in the exhaust passage (not shown).

シェル部材２の内部の流入管１２には、流入管１２の軸方向と直交して分岐管１４が取り付けられている。分岐管１４の先端は、シェル部材２の内部に開口されており、分岐管１４を通った排気ガスが、熱回収器６の入口１６側に導かれるように形成されている。   A branch pipe 14 is attached to the inflow pipe 12 inside the shell member 2 perpendicular to the axial direction of the inflow pipe 12. The distal end of the branch pipe 14 is opened inside the shell member 2, and the exhaust gas that has passed through the branch pipe 14 is formed to be guided to the inlet 16 side of the heat recovery unit 6.

熱回収器６は入口１６から流入した排気ガスを、出口１８からシェル部材２の内部に排出すると共に、排気ガスと内燃機関の冷却水を用いた熱交換媒体との間で熱交換を行う周知のものである。   The heat recovery unit 6 is a well-known example that exhaust gas flowing in from the inlet 16 is discharged into the shell member 2 from the outlet 18 and heat exchange is performed between the exhaust gas and a heat exchange medium using cooling water of the internal combustion engine. belongs to.

熱回収器６の出口１８側のシェル部材２の内部が仕切部材２０により仕切られており、仕切部材２０には開口２２が形成されている。開口２２に連通して案内管２４が仕切部材２０に取り付けられている。   The inside of the shell member 2 on the outlet 18 side of the heat recovery unit 6 is partitioned by a partition member 20, and an opening 22 is formed in the partition member 20. A guide tube 24 is attached to the partition member 20 in communication with the opening 22.

排気熱回収装置１には、上流側の排気流路からの排気ガスを、流入管１２、流入管１２の開口１３、シェル部材２の内部を通り、出口孔１０を介して下流側の排気流路に導くバイパス流路２６と、排気ガスを流入管１２、分岐管１４、熱回収器６、仕切部材２０の開口２２及び案内管２４を通って、シェル部材２の内部から出口孔１０を介して下流側の排気流路に導く排気熱回収流路２８とが設けられている。   In the exhaust heat recovery device 1, the exhaust gas from the upstream exhaust passage passes through the inflow pipe 12, the opening 13 of the inflow pipe 12, the inside of the shell member 2, and the downstream exhaust flow through the outlet hole 10. The bypass passage 26 leading to the passage, the exhaust gas passes through the inlet pipe 12, the branch pipe 14, the heat recovery device 6, the opening 22 of the partition member 20 and the guide pipe 24, and from the inside of the shell member 2 through the outlet hole 10. And an exhaust heat recovery passage 28 that leads to an exhaust passage on the downstream side.

開口１３側の流入管１２の外周には、ラッパ管３０が取り付けられており、このラッパ管３０の内周に接触して開口１３を遮断可能な切換バルブ３２の第１弁体３４が配置されている。   A trumpet pipe 30 is attached to the outer periphery of the inflow pipe 12 on the opening 13 side, and a first valve body 34 of a switching valve 32 that can contact the inner circumference of the trumpet pipe 30 and shut off the opening 13 is disposed. ing.

第１弁体３４は、流入管１２の軸方向と直交し、シェル部材２に揺動可能に支持された揺動軸３６に一体的に取り付けられており、第１弁体３４が揺動軸３６と共に揺動して、第１弁体３４がラッパ管３０の内周に接触して開口１３を遮断可能に形成されている。また、第１弁体３４が揺動軸３６と共に揺動して、第１弁体３４がラッパ管３０の内周から離間して開口１３を開放可能に形成されている。   The first valve body 34 is integrally attached to a swing shaft 36 that is orthogonal to the axial direction of the inflow pipe 12 and is supported swingably on the shell member 2. The first valve body 34 is attached to the swing shaft. The first valve body 34 is configured to be able to block the opening 13 by swinging together with 36 and contacting the inner periphery of the trumpet pipe 30. Further, the first valve body 34 swings together with the swing shaft 36, and the first valve body 34 is formed to be able to open the opening 13 by being separated from the inner periphery of the trumpet tube 30.

シェル部材２の外側には、揺動軸３６と同軸上にねじりバネ３８が配置されており、ねじりバネ３８の付勢力により、第１弁体３４がラッパ管３０の内周に接触して開口１３を遮断する方向に付勢されている。また、第１弁体３４がラッパ管３０の内周に接触した遮断状態では、流入管１２に流入する排気ガスの作用力が第１弁体３４に作用するように形成されている。   A torsion spring 38 is disposed on the outer side of the shell member 2 coaxially with the swing shaft 36, and the first valve element 34 contacts the inner periphery of the trumpet tube 30 by the biasing force of the torsion spring 38 and opens. 13 is urged in the direction of blocking. Further, when the first valve body 34 is in contact with the inner periphery of the trumpet pipe 30, the acting force of the exhaust gas flowing into the inflow pipe 12 is configured to act on the first valve body 34.

ラッパ管３０と反対側の第１弁体３４には、第２弁体４０が取り付けられている。本実施形態では、第２弁体４０は管が揺動軸３６を中心とする円弧状に湾曲した湾曲管状に形成されている。第２弁体４０の一端が第１弁体３４に取り付けられて第２弁体４０の一端が閉塞されると共に、第２弁体４０の他端は案内管２４及び仕切部材２０の開口２２に進退可能に挿入されている。   A second valve body 40 is attached to the first valve body 34 opposite to the trumpet pipe 30. In the present embodiment, the second valve body 40 is formed in a curved tubular shape in which the tube is curved in an arc shape with the swing shaft 36 as the center. One end of the second valve body 40 is attached to the first valve body 34 and one end of the second valve body 40 is closed, and the other end of the second valve body 40 is connected to the guide tube 24 and the opening 22 of the partition member 20. It is inserted so that it can be moved forward and backward.

尚、案内管２４は、第２弁体４０が摺動可能な挿入できるように、第２弁体４０と同様に、揺動軸３６を中心とする円弧状に形成するとよい。また、仕切部材２０の開口２２は、ほぼ、揺動軸３６を中心とする円上に配置されると共に、揺動軸３６を中心とする円の接線方向を向いて形成すればよい。   The guide tube 24 may be formed in an arc shape with the swing shaft 36 as the center, like the second valve body 40, so that the second valve body 40 can be slidably inserted. Further, the opening 22 of the partition member 20 may be formed substantially on a circle centered on the swing shaft 36 and facing the tangential direction of the circle centered on the swing shaft 36.

第１弁体３４が流入管１２の開口１３を遮断した状態のときに、第２弁体４０の他端は、仕切部材２０の開口２２に挿入された状態にある。そして、第２弁体４０の中程には、連通孔４４が形成されて、仕切部材２０の開口２２が第２弁体４０、連通孔４４、シェル部材２の内部を介して、出口孔１０に連通され、仕切部材２０の開口２２が開放可能に形成されている。   When the first valve body 34 blocks the opening 13 of the inflow pipe 12, the other end of the second valve body 40 is inserted into the opening 22 of the partition member 20. A communication hole 44 is formed in the middle of the second valve body 40, and the opening 22 of the partition member 20 is connected to the outlet hole 10 through the second valve body 40, the communication hole 44, and the inside of the shell member 2. The opening 22 of the partition member 20 is formed so as to be openable.

図３（イ）に示すように、揺動軸３６が揺動されると、第１弁体３４と共に第２弁体４０も同様に揺動し、第１弁体３４がラッパ管３０から離間して流入管１２の開口１３を開放する。また、第２弁体４０が案内管２４に沿って摺動して、本実施形態では、揺動角度が５５度となると、第２弁体４０の連通孔４４が仕切部材２０を超えて摺動し、仕切部材２０の開口２２が第２弁体４０により遮断される。   As shown in FIG. 3A, when the swing shaft 36 is swung, the second valve body 40 is swung in the same manner as the first valve body 34, and the first valve body 34 is separated from the trumpet tube 30. Then, the opening 13 of the inflow pipe 12 is opened. Further, in the present embodiment, when the second valve body 40 slides along the guide tube 24 and the swing angle becomes 55 degrees, the communication hole 44 of the second valve body 40 slides beyond the partition member 20. The opening 22 of the partition member 20 is blocked by the second valve body 40.

図３（ロ）に示すように、更に、揺動軸３６と共に第１弁体３４が揺動されると、第２弁体４０は更に案内管２４及び開口２２に挿入されて、連通孔４４は仕切部材２０の開口２２よりも更に熱回収器６側に挿入されて、第２弁体４０による開口２２の遮断は維持される。   As shown in FIG. 3 (b), when the first valve body 34 is further swung together with the rocking shaft 36, the second valve body 40 is further inserted into the guide tube 24 and the opening 22, and the communication hole 44. Is inserted further to the heat recovery device 6 side than the opening 22 of the partition member 20, and the blocking of the opening 22 by the second valve body 40 is maintained.

シェル部材２の外側に突き出された揺動軸３６の端には、レバー部材４６が一体的に取り付けられている。レバー部材４６に対向してアクチュエータ４８が配置されており、アクチュエータ４８には、図示しない内燃機関からの冷却水が供給される入口管５０と、冷却水を熱回収器６に供給する接続管５２とが取り付けられている。アクチュエータ４８は入口管５０から流入する冷却水の温度が高いときには、図示しないバイメタル等によりロッド５４を突き出して、レバー部材４６を介して揺動軸３６をねじりバネ３８の付勢力に抗して揺動させ、第１弁体３４をラッパ管３０から離間して、開口１３を開放する。   A lever member 46 is integrally attached to the end of the swing shaft 36 that protrudes to the outside of the shell member 2. An actuator 48 is disposed opposite to the lever member 46. The actuator 48 includes an inlet pipe 50 to which cooling water from an internal combustion engine (not shown) is supplied, and a connection pipe 52 that supplies the cooling water to the heat recovery unit 6. And are attached. When the temperature of the cooling water flowing in from the inlet pipe 50 is high, the actuator 48 protrudes the rod 54 with a bimetal (not shown) and the like, and the rocking shaft 36 is rocked against the biasing force of the torsion spring 38 via the lever member 46. The first valve body 34 is moved away from the trumpet tube 30 and the opening 13 is opened.

アクチュエータ４８に供給された冷却水は、接続管５２から熱回収器６に供給され、熱回収器６内で、排気ガスとの間で熱交換を行った後、出口管５６から内燃機関側に戻される。   The cooling water supplied to the actuator 48 is supplied from the connection pipe 52 to the heat recovery unit 6, and after exchanging heat with the exhaust gas in the heat recovery unit 6, from the outlet pipe 56 to the internal combustion engine side. Returned.

次に、前述した本実施形態の排気熱回収装置１の作動について説明する。
まず、内燃機関が始動されたときには、内燃機関の冷却水温度が低く、排気ガスの圧力や流速も低い。このときの排気ガスは、上流側の排気流路から流入管１２に供給されて、第１弁体３４がこの排気ガスの圧力を受けるが、排気ガスの圧力や流速は低く、ねじりバネ３８の付勢力に抗して、第１弁体３４は揺動軸３６と共に揺動しない。 Next, the operation of the exhaust heat recovery apparatus 1 of the present embodiment described above will be described.
First, when the internal combustion engine is started, the cooling water temperature of the internal combustion engine is low, and the pressure and flow velocity of the exhaust gas are also low. The exhaust gas at this time is supplied to the inflow pipe 12 from the upstream exhaust flow path, and the first valve body 34 receives the pressure of the exhaust gas, but the exhaust gas pressure and flow velocity are low, and the torsion spring 38 The first valve body 34 does not swing with the swing shaft 36 against the urging force.

また、入口管５０からアクチュエータ４８に供給される冷却水温度も低いので、アクチュエータ４８のロッド５４が突き出されることがなく、揺動軸３６はアクチュエータ４８により揺動されない。   Further, since the coolant temperature supplied from the inlet pipe 50 to the actuator 48 is also low, the rod 54 of the actuator 48 is not protruded, and the swing shaft 36 is not swinged by the actuator 48.

よって、排気ガスは、分岐管１４から排気熱回収流路２８に流入し、熱回収器６に供給される。熱回収器６では、排気ガスと冷却水との間で熱交換が行われて、暖められた冷却水が出口管５６から内燃機関に戻される。従って、冷却水温度が低い始動時に、冷却水が排気ガスにより加熱されて、すみやかに冷却水温度が上昇する。   Therefore, the exhaust gas flows from the branch pipe 14 into the exhaust heat recovery passage 28 and is supplied to the heat recovery unit 6. In the heat recovery unit 6, heat exchange is performed between the exhaust gas and the cooling water, and the heated cooling water is returned from the outlet pipe 56 to the internal combustion engine. Accordingly, at the start-up time when the cooling water temperature is low, the cooling water is heated by the exhaust gas, and the cooling water temperature rises quickly.

熱回収器６を通った排気ガスは、第２弁体４０、連通孔４４を通過して、シェル部材２の内部を介して、出口孔１０から下流側の排気流路に排出される。尚、寒冷地での運転の際に、冷却水温度が低い場合も同様である。   The exhaust gas that has passed through the heat recovery device 6 passes through the second valve body 40 and the communication hole 44 and is discharged from the outlet hole 10 to the downstream exhaust passage through the inside of the shell member 2. The same applies when the cooling water temperature is low during operation in a cold region.

内燃機関が搭載された車両の加速運転中などの場合には、単位時間当たりの排気ガス量が増加すると共に圧力が上昇する。この排気ガスが上流側の排気流路から流入管１２に供給されて、第１弁体３４に排気ガスが作用して、ねじりバネ３８の付勢力を上回ると、第１弁体３４が揺動軸３６と共に揺動して、開口１３が開放される。   For example, during acceleration operation of a vehicle equipped with an internal combustion engine, the amount of exhaust gas per unit time increases and the pressure increases. When this exhaust gas is supplied from the upstream exhaust passage to the inflow pipe 12 and the exhaust gas acts on the first valve body 34 and exceeds the urging force of the torsion spring 38, the first valve body 34 swings. Swing with the shaft 36 to open the opening 13.

これにより、排気ガスは、流入管１２から開口１３を介してシェル部材２の内部に流入し、更に、出口孔１０から下流側の排気流路に排出される。第１弁体３４が排気ガスの流れによる作用力を受けて、揺動軸３６の廻りに揺動すると、バイパス流路２６が開放され、第２弁体４０が案内管２４、開口２２を摺動して、熱回収器６側に入り込む。   As a result, the exhaust gas flows into the shell member 2 from the inflow pipe 12 through the opening 13, and is further discharged from the outlet hole 10 to the downstream exhaust flow path. When the first valve body 34 receives an acting force due to the flow of exhaust gas and swings around the swing shaft 36, the bypass flow path 26 is opened, and the second valve body 40 slides along the guide tube 24 and the opening 22. It moves into the heat recovery unit 6 side.

そして、本実施形態では、図３（イ）に示すように、揺動角度がほぼ５５度に達すると、連通孔４４が開口２２を通過して、仕切部材２０よりも熱回収器６側に移動する。これにより、開口２２が第２弁体４０により遮断されて、排気熱回収流路２８を介した排気ガスの流れは遮断される。排気ガスはバイパス流路２６を通って下流側の排気流路に流れ、排気熱回収流路２８を通らないので、排気ガスと冷却水との間での熱交換が行われず、図示しないラジエータの負担が増加するのを抑制できる。   In this embodiment, as shown in FIG. 3A, when the swing angle reaches approximately 55 degrees, the communication hole 44 passes through the opening 22 and is closer to the heat recovery device 6 than the partition member 20. Moving. As a result, the opening 22 is blocked by the second valve body 40 and the flow of the exhaust gas through the exhaust heat recovery flow path 28 is blocked. The exhaust gas flows through the bypass flow path 26 to the downstream exhaust flow path and does not pass through the exhaust heat recovery flow path 28, so heat exchange between the exhaust gas and the cooling water is not performed, and a radiator (not shown) The increase in burden can be suppressed.

更に、内燃機関からの排気ガスの流量が増加すると、第１弁体３４への排気ガスの流れによる作用力も更に増加し、例えば、図３（ロ）に示すように、第１弁体３４が揺動して揺動角度が６５度になる。その際、第２弁体４０は案内管２４、開口２２を摺動して、更に熱回収器６側に入り込むが、開口２２の遮断は維持される。   Further, when the flow rate of the exhaust gas from the internal combustion engine increases, the acting force due to the flow of the exhaust gas to the first valve body 34 further increases. For example, as shown in FIG. The swing angle is 65 degrees. At this time, the second valve body 40 slides on the guide tube 24 and the opening 22 and further enters the heat recovery device 6 side, but the opening 22 is kept blocked.

このように、第２弁体４０により開口２２が遮断された状態で、更に、排気ガスの流量が増加して、第１弁体３４が第２弁体４０と共に揺動しても、第２弁体４０は更に開口２２、案内管２４内を摺動して、開口２２の遮断を維持する。よって、第２弁体４０が開口２２を遮断した状態で、第１弁体３４が更に開放方向に揺動しても、第２弁体４０も遮断状態を維持して揺動することができる。従って、第２弁体４０が開口２２を遮断したときに、それ以上の第１弁体３４の揺動を抑制する必要がない。   As described above, even when the opening 22 is blocked by the second valve body 40 and the flow rate of the exhaust gas further increases and the first valve body 34 swings together with the second valve body 40, the second The valve body 40 further slides in the opening 22 and the guide tube 24 to keep the opening 22 blocked. Therefore, even if the first valve body 34 further swings in the opening direction with the second valve body 40 blocking the opening 22, the second valve body 40 can also swing while maintaining the blocked state. . Therefore, when the second valve body 40 blocks the opening 22, it is not necessary to suppress further swinging of the first valve body 34.

これにより、切換バルブ３２は、第１弁体３４を所定の角度で揺動を抑制しなくても、第２弁体４０による遮断状態を維持でき、第１弁体３４の停止角度を制御する必要がなく、構成が容易になる。   Thereby, the switching valve 32 can maintain the cutoff state by the second valve body 40 without controlling the swinging of the first valve body 34 at a predetermined angle, and controls the stop angle of the first valve body 34. There is no need, and the configuration becomes easy.

一方、内燃機関からの冷却水の温度が上昇したときには、アクチュエータ４８のロッド５４が突き出されて、レバー部材４６及び揺動軸３６を介して第１弁体３４がねじりバネ３８の付勢力に抗して揺動軸３６の廻りに揺動される。   On the other hand, when the temperature of the cooling water from the internal combustion engine rises, the rod 54 of the actuator 48 is protruded, and the first valve body 34 resists the biasing force of the torsion spring 38 via the lever member 46 and the swing shaft 36. Thus, it is swung around the swinging shaft 36.

第１弁体３４の揺動と共に、第２弁体４０が案内管２４、開口２２を摺動して、熱回収器６側に入り込む。バイパス流路２６が開放され、連通孔４４が開口２２を通過すると、開口２２が第２弁体４０により遮断されて、排気熱回収流路２８は遮断される。   As the first valve body 34 swings, the second valve body 40 slides on the guide tube 24 and the opening 22 and enters the heat recovery unit 6 side. When the bypass flow path 26 is opened and the communication hole 44 passes through the opening 22, the opening 22 is blocked by the second valve body 40 and the exhaust heat recovery flow path 28 is blocked.

更に冷却水の温度が上昇すると、更にロッド５４が突き出されて第１弁体３４が揺動され、前述したと同様に、第２弁体４０が案内管２４、開口２２を摺動して、更に熱回収器６側に入り込むが、開口２２の遮断は維持される。   When the temperature of the cooling water further rises, the rod 54 is further protruded and the first valve body 34 is swung, and the second valve body 40 slides on the guide tube 24 and the opening 22 in the same manner as described above. Furthermore, although it enters the heat recovery device 6 side, the opening 22 is kept blocked.

従って、アクチュエータ４８により第１弁体３４を揺動させる場合でも、切換バルブ３２は、第１弁体３４を所定の角度で揺動を抑制しなくても、第２弁体４０による遮断状態を維持でき、第１弁体３４の停止角度を制御する必要がなく、構成が容易になる。   Therefore, even when the first valve body 34 is swung by the actuator 48, the switching valve 32 does not block the first valve body 34 at a predetermined angle, and the cut-off state by the second valve body 40 is maintained. This can be maintained, and there is no need to control the stop angle of the first valve body 34, and the configuration becomes easy.

次に、前述した第１実施形態と異なる第２実施形態の排気熱回収装置６１について、図４、図５によって説明する。尚、前述した第１実施形態と同じ部材については同一番号を付して詳細な説明を省略する。以下同様。   Next, an exhaust heat recovery device 61 of a second embodiment different from the first embodiment described above will be described with reference to FIGS. The same members as those in the first embodiment described above are denoted by the same reference numerals and detailed description thereof is omitted. The same applies hereinafter.

本第２実施形態の排気熱回収装置６１では、まず、前述した仕切部材２０の形状が異なり、第２実施形態では、仕切部材６２に揺動軸３６を中心として円弧状に形成された湾曲壁６４が形成されると共に、仕切部材６２が熱回収器６の出口１８側を覆うように形成されている。湾曲壁６４には、連通孔６６が形成されると共に、連通孔６６に連通する開口６８が形成された湾曲板７０が湾曲壁６４上に取り付けられている。連通孔６６と開口６８とは、揺動軸３６を中心とした放射方向に開口して形成されている。   In the exhaust heat recovery apparatus 61 of the second embodiment, first, the shape of the partition member 20 described above is different. In the second embodiment, a curved wall formed in an arc shape around the swing shaft 36 in the partition member 62. 64 is formed, and the partition member 62 is formed so as to cover the outlet 18 side of the heat recovery unit 6. In the curved wall 64, a communication hole 66 is formed, and a curved plate 70 in which an opening 68 communicating with the communication hole 66 is formed is attached on the curved wall 64. The communication hole 66 and the opening 68 are formed so as to open in a radial direction around the swing shaft 36.

第１弁体３４には、第２弁体７２の一端が取り付けられており、第２弁体７２は揺動軸３６を中心とする円弧板状に形成されると共に、第２弁体７２の他端が湾曲板７０の外側に接触して摺動可能に形成されている。図４に示すように、第１弁体３４がラッパ管３０に接触している状態では、第２弁体７２は湾曲板７０に接触することなく、離れた位置にある。   One end of a second valve body 72 is attached to the first valve body 34, and the second valve body 72 is formed in an arc plate shape with the swing shaft 36 as the center. The other end contacts the outside of the curved plate 70 and is slidable. As shown in FIG. 4, in a state where the first valve body 34 is in contact with the trumpet pipe 30, the second valve body 72 is in a separated position without contacting the curved plate 70.

流入管１２、分岐管１４、シェル部材２の内部、熱回収器６、仕切部材６２、連通孔６６、開口６８、シェル部材２の内部、出口孔１０により、排気熱回収流路７６が形成されている。バイパス流路２６については、前述した第１実施形態と同様である。   An exhaust heat recovery flow path 76 is formed by the inflow pipe 12, the branch pipe 14, the inside of the shell member 2, the heat recovery device 6, the partition member 62, the communication hole 66, the opening 68, the inside of the shell member 2, and the outlet hole 10. ing. The bypass channel 26 is the same as in the first embodiment described above.

この第２実施形態の場合でも、排気ガスの流量が増加すると、第１弁体３４が揺動軸３６の廻りに揺動して、第１弁体３４がラッパ管３０から離間して、開口１３を開放する。第１弁体３４の揺動と共に、第２弁体７２も揺動軸３６の廻りに揺動し、第２弁体７２の他端は湾曲板７０の外側に接触した状態で、湾曲板７０に沿って摺動する。   Even in the case of the second embodiment, when the flow rate of the exhaust gas increases, the first valve body 34 swings around the swinging shaft 36, and the first valve body 34 is separated from the trumpet tube 30 to be opened. 13 is released. As the first valve body 34 swings, the second valve body 72 swings around the swing shaft 36, and the other end of the second valve body 72 is in contact with the outside of the curved plate 70. Slide along.

そして、図５（イ）に示すように、第１弁体３４の揺動角度がほぼ５５度に達すると、第２弁体７２が開口６８を遮断する。更に排気ガスの流量が増加すると、図５（ロ）に示すように、第１弁体３４が更に揺動し、第２弁体７２も湾曲板７０に沿って摺動して、開口６８の遮断状態を維持する。   Then, as shown in FIG. 5A, when the swing angle of the first valve body 34 reaches approximately 55 degrees, the second valve body 72 blocks the opening 68. When the flow rate of the exhaust gas further increases, as shown in FIG. 5B, the first valve body 34 further swings, and the second valve body 72 also slides along the curved plate 70, Maintain shut-off state.

この第２実施形態の排気熱回収装置６１でも、切換バルブ３２は、第１弁体３４を所定の角度で揺動を抑制しなくても、第２弁体７２による遮断状態を維持でき、第１弁体３４の停止角度を制御する必要がなく、構成が容易になる。尚、アクチュエータ４８により揺動軸３６を揺動させる場合も同様である。   Even in the exhaust heat recovery apparatus 61 of the second embodiment, the switching valve 32 can maintain the shut-off state by the second valve body 72 without suppressing the swinging of the first valve body 34 at a predetermined angle. It is not necessary to control the stop angle of the single valve body 34, and the configuration becomes easy. The same applies when the swing shaft 36 is swung by the actuator 48.

次に、第３実施形態の排気熱回収装置８１について、図６、図７によって説明する。
第３実施形態の排気熱回収装置８１では、前述した第１実施形態と同様の仕切部材２０に開口２２が形成されており、また、第１弁体３４に第２弁体８２が取り付けられている。第２弁体８２は、開口２２を閉塞可能な蓋部８４と、蓋部８４から延出された支持部８６とを備え、支持部８６の端は第１弁体３４に固定されている。第２弁体８２はバネ鋼板により形成されており、支持部８６は弾性変形可能である。 Next, the exhaust heat recovery device 81 of the third embodiment will be described with reference to FIGS.
In the exhaust heat recovery device 81 of the third embodiment, the opening 22 is formed in the partition member 20 similar to the first embodiment described above, and the second valve body 82 is attached to the first valve body 34. Yes. The second valve body 82 includes a lid portion 84 that can close the opening 22 and a support portion 86 that extends from the lid portion 84, and an end of the support portion 86 is fixed to the first valve body 34. The second valve body 82 is formed of a spring steel plate, and the support portion 86 can be elastically deformed.

第１弁体３４がラッパ管３０に接触して開口１３を遮断した状態では、第２弁体８２は開口２２から離間した位置にあり、排気熱回収流路２８は開放されている。この第３実施形態の場合でも、排気ガスの流量が増加すると、第１弁体３４が揺動軸３６の廻りに揺動して、第１弁体３４がラッパ管３０から離間して、開口１３を開放する。   In a state where the first valve body 34 is in contact with the trumpet pipe 30 and the opening 13 is blocked, the second valve body 82 is located away from the opening 22 and the exhaust heat recovery flow path 28 is opened. Even in the case of the third embodiment, when the flow rate of the exhaust gas is increased, the first valve body 34 swings around the swinging shaft 36, and the first valve body 34 is separated from the trumpet tube 30 to be opened. 13 is released.

第１弁体３４の揺動と共に、第２弁体８２も揺動軸３６の廻りに、開口２２に向かって揺動する。そして、図７（イ）に示すように、第１弁体３４の揺動角度がほぼ５５度に達すると、第２弁体８２が開口２２を遮断する。   As the first valve body 34 swings, the second valve body 82 swings around the swing shaft 36 toward the opening 22. Then, as shown in FIG. 7A, when the swing angle of the first valve body 34 reaches approximately 55 degrees, the second valve body 82 blocks the opening 22.

更に排気ガスの流量が増加すると、図７（ロ）に示すように、第１弁体３４が更に揺動し、第２弁体８２の支持部８６が弾性変形して、蓋部８４による開口２２の遮断状態を維持する。   When the flow rate of the exhaust gas further increases, as shown in FIG. 7 (b), the first valve body 34 further swings, the support portion 86 of the second valve body 82 is elastically deformed, and the opening by the lid portion 84. The 22 interruption | blocking state is maintained.

この第３実施形態の排気熱回収装置８１でも、切換バルブ３２は、第１弁体３４を所定の角度で揺動を抑制しなくても、第２弁体８２による遮断状態を維持でき、第１弁体３４の停止角度を制御する必要がなく、構成が容易になる。尚、アクチュエータ４８により揺動軸３６を揺動させる場合も同様である。   Even in the exhaust heat recovery apparatus 81 of the third embodiment, the switching valve 32 can maintain the shut-off state by the second valve body 82 without suppressing the swinging of the first valve body 34 at a predetermined angle. It is not necessary to control the stop angle of the single valve body 34, and the configuration becomes easy. The same applies when the swing shaft 36 is swung by the actuator 48.

以上本発明はこの様な実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得る。   The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

本発明の一実施形態としての排気熱回収装置の正面図である。It is a front view of the exhaust heat recovery device as one embodiment of the present invention. 本実施形態の排気熱回収装置の中央断面図である。It is a center sectional view of the exhaust heat recovery device of this embodiment. 本実施形態の排気熱回収装置の第１弁体がバイパス流路を開放した状態を示す中央断面図である。It is a center sectional view showing the state where the 1st valve body of the exhaust heat recovery device of this embodiment opened the bypass channel. 第２実施形態の排気熱回収装置の中央断面図である。It is a center sectional view of the exhaust heat recovery device of a 2nd embodiment. 第２実施形態の排気熱回収装置の第１弁体がバイパス流路を開放した状態を示す中央断面図である。It is a center sectional view showing the state where the 1st valve body of the exhaust heat recovery device of a 2nd embodiment opened the bypass channel. 第３実施形態の排気熱回収装置の中央断面図である。It is a center sectional view of the exhaust heat recovery device of a 3rd embodiment. 第３実施形態の排気熱回収装置の第１弁体がバイパス流路を開放した状態を示す中央断面図である。It is a center sectional view showing the state where the 1st valve element of the exhaust heat recovery device of a 3rd embodiment opened the bypass channel.

符号の説明Explanation of symbols

１，６１，８１…排気熱回収装置
２…シェル部材 ４…切欠部
６…熱回収器 ８…入口孔
１０…出口孔 １２…流入管
１３…開口 １４…分岐管
２０，６２…仕切部材 ２２…開口
２４…案内管 ２６…バイパス流路
２８，７６…排気熱回収流路
３０…ラッパ管 ３２…切換バルブ
３４…第１弁体 ３６…揺動軸
３８…ねじりバネ ４０，７２，８２…第２弁体
４４…連通孔 ４６…レバー部材
４８…アクチュエータ ５０…入口管
５４…ロッド ５６…出口管
６４…湾曲壁 ６６…連通孔
６８…開口 ７０…湾曲板
８４…蓋部 ８６…支持部 DESCRIPTION OF SYMBOLS 1,61,81 ... Exhaust heat recovery apparatus 2 ... Shell member 4 ... Notch part 6 ... Heat recovery device 8 ... Inlet hole 10 ... Outlet hole 12 ... Inflow pipe 13 ... Opening 14 ... Branch pipe 20, 62 ... Partition member 22 ... Opening 24 ... guide pipe 26 ... bypass flow path 28, 76 ... exhaust heat recovery flow path 30 ... trumpet pipe 32 ... switching valve 34 ... first valve element 36 ... swing shaft 38 ... torsion spring 40, 72, 82 ... second Valve body 44 ... Communication hole 46 ... Lever member 48 ... Actuator 50 ... Inlet pipe 54 ... Rod 56 ... Outlet pipe 64 ... Curved wall 66 ... Communication hole 68 ... Opening 70 ... Curved plate 84 ... Cover part 86 ... Supporting part

Claims (6)

内燃機関からの排気流路に介装され、上流側の前記排気流路からの排気ガスを下流側の前記排気流路に導くバイパス流路と、上流側の前記排気流路からの排気ガスを熱交換媒体との間で熱交換を行って下流側の前記排気流路に導く排気熱回収流路とを備えた排気熱回収装置において、
前記バイパス流路または前記排気熱回収流路から下流側の前記排気流路へ前記排気ガスの流れを切り換える切換バルブを設け、
前記切換バルブは揺動軸の廻りに揺動可能に支持され前記バイパス流路を開放・遮断する第１弁体を備えると共に、前記排気熱回収流路を開放・遮断する第２弁体を備え、
前記第１弁体の揺動と共に揺動可能に前記第２弁体を前記第１弁体に係合し、前記第１弁体の揺動による前記バイパス流路の開放と共に、前記第２弁体が揺動して前記排気熱回収流路を遮断し、かつ、前記第１弁体の更なる揺動により前記第２弁体は前記排気熱回収流路の遮断状態を維持することを特徴とする排気熱回収装置。 A bypass passage that is interposed in an exhaust passage from the internal combustion engine and guides exhaust gas from the upstream exhaust passage to the exhaust passage on the downstream side, and exhaust gas from the upstream exhaust passage. In an exhaust heat recovery apparatus comprising an exhaust heat recovery flow path that conducts heat exchange with a heat exchange medium and leads to the exhaust flow path on the downstream side,
A switching valve for switching the flow of the exhaust gas from the bypass flow path or the exhaust heat recovery flow path to the exhaust flow path downstream;
The switching valve includes a first valve body that is swingably supported around a swing shaft and opens and closes the bypass flow path, and a second valve body that opens and closes the exhaust heat recovery flow path. ,
The second valve body is engaged with the first valve body so as to be capable of swinging together with the swinging of the first valve body, and the bypass valve is opened by the swinging of the first valve body. A body swings to shut off the exhaust heat recovery flow path, and the second valve body maintains the shut off state of the exhaust heat recovery flow path by further swinging of the first valve body. Exhaust heat recovery device. 前記第１弁体は付勢部材により遮断方向に付勢されると共に、前記排気ガスの作用力を開放方向に受けることを特徴とする請求項１に記載の排気熱回収装置。   2. The exhaust heat recovery apparatus according to claim 1, wherein the first valve body is urged in a blocking direction by an urging member and receives an action force of the exhaust gas in an opening direction. 前記切換バルブは、アクチュエータにより前記第１弁体を揺動させることを特徴とする請求項１または請求項２のいずれかに記載の排気熱回収装置。   The exhaust heat recovery apparatus according to claim 1 or 2, wherein the switching valve swings the first valve body by an actuator. 前記第２弁体は前記揺動軸を中心とする湾曲管状に形成されると共に、前記第２弁体の一端が前記第１弁体に取り付けられ、前記第１弁体の揺動により前記第２弁体の他端が前記排気熱回収流路の開口へ進退して前記排気熱回収流路を開放・遮断することを特徴とする請求項１ないし請求項３のいずれかに記載の排気熱回収装置。   The second valve body is formed in a curved tubular shape centering on the swing shaft, and one end of the second valve body is attached to the first valve body, and the first valve body swings to move the first valve body. 4. The exhaust heat according to claim 1, wherein the other end of the two-valve body advances and retreats to and from the opening of the exhaust heat recovery flow path to open / close the exhaust heat recovery flow path. Recovery device. 前記第２弁体は前記揺動軸を中心とする円弧板状に形成されると共に、前記第２弁体の一端が前記第１弁体に取り付けられ、前記第１弁体の揺動により前記第２弁体の他端が前記揺動軸から放射方向に配置した前記排気熱回収流路の開口を開放・閉塞して前記排気熱回収流路を開放・遮断することを特徴とする請求項１ないし請求項３のいずれかに記載の排気熱回収装置。   The second valve body is formed in an arc plate shape centered on the swing shaft, and one end of the second valve body is attached to the first valve body. The other end of the second valve body opens / closes the opening of the exhaust heat recovery flow path disposed radially from the swing shaft to open / close the exhaust heat recovery flow path. The exhaust heat recovery device according to any one of claims 1 to 3. 前記第２弁体は前記第１弁体に弾性係合され、前記第１弁体の揺動により前記第２弁体が前記排気熱回収流路を開放・遮断し、かつ、前記バイパス流路の開放方向への前記第１弁体の更なる揺動により弾性変形して前記第２弁体が前記排気熱回収流路の遮断状態を維持することを特徴とする請求項１ないし請求項３のいずれかに記載の排気熱回収装置。   The second valve body is elastically engaged with the first valve body, and the second valve body opens and closes the exhaust heat recovery flow path by swinging the first valve body, and the bypass flow path 4. The first valve body is further elastically deformed by further swinging of the first valve body in the opening direction, and the second valve body maintains the shut-off state of the exhaust heat recovery flow path. The exhaust heat recovery device according to any one of the above.
JP2007197374A 2007-07-30 2007-07-30 Exhaust heat recovery device Pending JP2009030569A (en)

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JP2012246835A (en) * 2011-05-27 2012-12-13 Yutaka Giken Co Ltd Exhaust heat recovery apparatus
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JP2015025604A (en) * 2013-07-25 2015-02-05 株式会社ユタカ技研 Heat exchanger and heat exchange device
JP2015148160A (en) * 2014-02-05 2015-08-20 株式会社三五 Exhaust heat recovery device
JP2016044666A (en) * 2014-08-27 2016-04-04 株式会社三五 Exhaust heat recovery device of internal combustion engine
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KR20170088993A (en) * 2014-12-31 2017-08-02 포르시아 쥐스뗌 데샤피망 Heat recovery device and exhaust line fitted with such device
WO2020027361A1 (en) * 2018-07-30 2020-02-06 세종공업 주식회사 Exhaust heat recovery apparatus having dual valve
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JP2011247206A (en) * 2010-05-28 2011-12-08 Yutaka Giken Co Ltd Exhaust heat recovery device
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US8893485B2 (en) 2011-05-27 2014-11-25 Yutaka Giken Co., Ltd. Exhaust heat recovery apparatus
JP2013213435A (en) * 2012-04-02 2013-10-17 Yutaka Giken Co Ltd Exhaust heat recovery device
JP2015025604A (en) * 2013-07-25 2015-02-05 株式会社ユタカ技研 Heat exchanger and heat exchange device
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JP2016044666A (en) * 2014-08-27 2016-04-04 株式会社三五 Exhaust heat recovery device of internal combustion engine
KR20170088993A (en) * 2014-12-31 2017-08-02 포르시아 쥐스뗌 데샤피망 Heat recovery device and exhaust line fitted with such device
KR101974764B1 (en) * 2014-12-31 2019-05-02 포르시아 쥐스뗌 데샤피망 Heat recovery device and exhaust line fitted with such device
US10337382B2 (en) 2014-12-31 2019-07-02 Faurecia Systems D'echappement Heat recovery device and exhaust line fitted with such device
KR101708777B1 (en) * 2015-09-10 2017-02-21 세종공업 주식회사 Exhaust heat recovery device having preventing vortex function
KR101732014B1 (en) * 2016-06-03 2017-05-04 세종공업 주식회사 Exhaust heat recovery device having elastic open-and-shut valve
WO2020027361A1 (en) * 2018-07-30 2020-02-06 세종공업 주식회사 Exhaust heat recovery apparatus having dual valve
US11022069B2 (en) 2018-12-07 2021-06-01 Tenneco Automotive Operating Company Inc. Exhaust gas heat recovery system
US11041459B2 (en) 2018-12-07 2021-06-22 Tenneco Automotive Operating Company Inc. Exhaust gas heat recovery system
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