JP2008232084A - Exhaust gas heat recovering muffler - Google Patents

Exhaust gas heat recovering muffler Download PDF

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Publication number
JP2008232084A
JP2008232084A JP2007075806A JP2007075806A JP2008232084A JP 2008232084 A JP2008232084 A JP 2008232084A JP 2007075806 A JP2007075806 A JP 2007075806A JP 2007075806 A JP2007075806 A JP 2007075806A JP 2008232084 A JP2008232084 A JP 2008232084A
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Japan
Prior art keywords
exhaust
exhaust gas
heat recovery
exhaust heat
pipe
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Pending
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JP2007075806A
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Japanese (ja)
Inventor
Satoshi Kimura
敏 木村
Ryoichi Hori
亮一 堀
Norimitsu Matsudaira
範光 松平
Shiro Nakajima
史朗 中嶋
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Marelli Corp
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Calsonic Kansei Corp
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Publication date
Application filed by Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Priority to JP2007075806A priority Critical patent/JP2008232084A/en
Priority to PCT/JP2008/052396 priority patent/WO2008117580A1/en
Publication of JP2008232084A publication Critical patent/JP2008232084A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust gas heat recovering muffler capable of reducing exhaust noise when exhaust gas heat is recovered as well as when exhaust heat is not recovered. <P>SOLUTION: The exhaust gas heat recovering muffler 1 is provided with an inner tube 3 in which exhaust gas flows, an outer tube 2 arranged outside of the inner tube 3, an exhaust heat recovery part 4 arranged between the inner tube 3 and the outer tube 2 and recovering exhaust gas heat by exchanging heat between exhaust gas and heat exchanging medium, an inflow pipe 22 supplying the heat exchange medium to the exhaust heat recovery part 4 with passing through the outer tube 2, a discharge tube 23 discharging heat exchange medium from the exhaust heat recovery part 4 with passing through the outer tube 2, and a change over part 5 changing over flow of exhaust gas to the inner tube 3 and the exhaust gas heat recovery part 4, and is provided with a sound attenuation part 6 communicating with both of the exhaust gas heat recovery part 4 and the inner tube 3 and reducing exhaust noise of exhaust gas passing through the exhaust gas heat recovery part 4 or the inner tube 3 irrespective of the change over part 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、排気熱回収マフラに関する。   The present invention relates to an exhaust heat recovery muffler.

従来、排気熱回収装置で回収した熱を利用する技術が公知となっており、この排気熱回収装置とマフラを一体的に形成した排気熱回収マフラの技術が公知になっている（特許文献１〜３参照）。
特開２００６−１０５１２４号公報 特開２００７−３２５６１号公報 特開２００４−１６９５９４号公報 Conventionally, a technique using heat recovered by an exhaust heat recovery device has been publicly known, and a technology of an exhaust heat recovery muffler in which the exhaust heat recovery device and the muffler are integrally formed is known (Patent Document 1). To 3).
JP 2006-105124 A JP 2007-32561 A JP 2004-169594 A

しかしながら、従来の発明にあっては、排気熱の非回収時に排気ガスの排気騒音を低減できるものの、排気熱回収時に排気騒音が大きくなるという問題点があった。   However, in the conventional invention, although exhaust gas exhaust noise can be reduced when exhaust heat is not recovered, there is a problem that exhaust noise increases when exhaust heat is recovered.

本発明は上記課題を解決するためになされたものであって、その目的とするところは、排気熱の非回収時に加えて、排気熱の回収時にも排気ガスの排気騒音を低減できる排気熱回収マフラを提供することである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide exhaust heat recovery that can reduce exhaust gas exhaust noise when exhaust heat is recovered in addition to when exhaust heat is not recovered. To provide a muffler.

本発明の請求項１記載の発明では、排気ガスが通過する内管と、前記内管の外側に配置される外管と、前記内管と外管の間に配置され、且つ、排気ガスと熱交換媒体との間で熱交換を行うことにより排気熱を回収する排気熱回収部と、前記外管を貫通した状態で排気熱回収部へ熱交換媒体を供給する流入管と、前記外管を貫通した状態で排気熱回収部から熱交換媒体を排出する排出管と、前記内管と前記排気熱回収部に排気ガスの流れを切り換える切換部を備える排気熱回収マフラにおいて、前記排気熱回収部と内管の両方に連通し、該排気熱回収部または内管を通過する排気ガスの排気騒音を前記切換部の切り換えに関わらず低減する消音部を備えることを特徴とする。   In the first aspect of the present invention, the inner pipe through which the exhaust gas passes, the outer pipe disposed outside the inner pipe, the exhaust pipe disposed between the inner pipe and the outer pipe, An exhaust heat recovery section that recovers exhaust heat by exchanging heat with the heat exchange medium, an inflow pipe that supplies the heat exchange medium to the exhaust heat recovery section in a state of passing through the outer pipe, and the outer pipe In the exhaust heat recovery muffler, the exhaust heat recovery muffler includes a discharge pipe that discharges a heat exchange medium from the exhaust heat recovery section in a state of passing through the exhaust pipe, and a switching section that switches the flow of exhaust gas to the inner pipe and the exhaust heat recovery section. And a silencer that communicates with both the exhaust pipe and the inner pipe and reduces exhaust noise of exhaust gas passing through the exhaust heat recovery section or the inner pipe regardless of the switching of the switching section.

本発明の請求項１記載の発明にあっては、排気ガスが通過する内管と、前記内管の外側に配置される外管と、前記内管と外管の間に配置され、且つ、排気ガスと熱交換媒体との間で熱交換を行うことにより排気熱を回収する排気熱回収部と、前記外管を貫通した状態で排気熱回収部へ熱交換媒体を供給する流入管と、前記外管を貫通した状態で排気熱回収部から熱交換媒体を排出する排出管と、前記内管と前記排気熱回収部に排気ガスの流れを切り換える切換部を備える排気熱回収マフラにおいて、前記排気熱回収部と内管の両方に連通し、該排気熱回収部または内管を通過する排気ガスの排気騒音を前記切換部の切り換えに関わらず低減する消音部を備えるため、排気熱の非回収時に加えて、排気熱の回収時にも排気ガスの排気騒音を低減できる。   In the first aspect of the present invention, the inner tube through which the exhaust gas passes, the outer tube disposed outside the inner tube, the inner tube and the outer tube, and An exhaust heat recovery section that recovers exhaust heat by exchanging heat between the exhaust gas and the heat exchange medium; an inflow pipe that supplies the heat exchange medium to the exhaust heat recovery section in a state of passing through the outer pipe; In an exhaust heat recovery muffler comprising a discharge pipe for discharging a heat exchange medium from an exhaust heat recovery part in a state of passing through the outer pipe, and a switching part for switching the flow of exhaust gas to the inner pipe and the exhaust heat recovery part, A silencer that communicates with both the exhaust heat recovery section and the inner pipe and reduces exhaust noise of exhaust gas passing through the exhaust heat recovery section or the inner pipe regardless of the switching of the switching section is provided. Reduces exhaust gas noise when recovering exhaust heat as well as during recovery Kill.

以下、この発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

以下、実施例１を説明する。
図１は本発明の実施例１の排気熱回収マフラを示す側断面図、図２は図１のＳ２−Ｓ２線における断面図、図３、４は本実施例１の排気熱回収時の作用を説明する図である。 Example 1 will be described below.
1 is a side sectional view showing an exhaust heat recovery muffler according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line S2-S2 in FIG. 1, and FIGS. 3 and 4 are actions during exhaust heat recovery according to the first embodiment. FIG.

先ず、全体構成を説明する。
図１に示すように、本実施例１の排気熱回収マフラ１では、外管２と、内管３と、排気熱回収部４と、切換部５と、消音部６等が備えられている。 First, the overall configuration will be described.
As shown in FIG. 1, the exhaust heat recovery muffler 1 according to the first embodiment includes an outer tube 2, an inner tube 3, an exhaust heat recovery unit 4, a switching unit 5, a silencer 6, and the like. .

外管２は、円筒状のシェル７と、このシェル７の開口両端を閉塞する略皿状のエンドプレート8,9とから構成される他、シェル７の両端部はそれぞれ対応するエンドプレート8,9の外周に全周に亘って溶接Ｘ１等で固定されている。   The outer tube 2 is composed of a cylindrical shell 7 and substantially dish-shaped end plates 8 and 9 that close both ends of the opening of the shell 7, and both end portions of the shell 7 have corresponding end plates 8 and 8 respectively. It is fixed to the outer periphery of 9 by welding X1 or the like over the entire periphery.

外管２の内部は、それぞれ略皿状の３つの仕切り部10,11,12に仕切られ、これによって、４つの室R1,R2,R3,R4が形成されている。
なお、シェル７と各仕切り部10,11,12は、図外のスポット溶接等によりそれぞれ固定されている。 The inside of the outer tube 2 is partitioned into three substantially dish-shaped partition portions 10, 11, and 12, thereby forming four chambers R1, R2, R3, and R4.
In addition, the shell 7 and each partition part 10,11,12 are each being fixed by spot welding etc. which are not shown in figure.

内管３は、直管状に形成される他、外管２のエンドプレート8,9を貫通した状態で設けられる他、その両端部が全周に亘ってそれぞれ対応するエンドプレート8,9に溶接Ｘ２等で固定されている。
また、内管３の中途部の外側には円筒状のシェル１３が設けられると共に、このシェル１３の両端部は内管３の外周に全周に亘って溶接Ｘ３等でそれぞれ固定され、これによって、内管３とシェル７の間に断熱空間１４が形成されている。
さらに、内管３の外周には、室R1,R3,R4にそれぞれ連通する複数のパンチング孔15,16,17が形成されている。 The inner tube 3 is formed in a straight tube shape, is provided in a state of passing through the end plates 8 and 9 of the outer tube 2, and both ends thereof are welded to the corresponding end plates 8 and 9 over the entire circumference. It is fixed with X2 etc.
In addition, a cylindrical shell 13 is provided outside the middle portion of the inner tube 3, and both end portions of the shell 13 are respectively fixed to the outer periphery of the inner tube 3 by welding X3 or the like. A heat insulating space 14 is formed between the inner tube 3 and the shell 7.
Furthermore, a plurality of punching holes 15, 16, and 17 communicating with the chambers R1, R3, and R4, respectively, are formed on the outer periphery of the inner tube 3.

切換部５は、外管２のシェル７から室Ｒ１を介して内管３に挿通された円筒状のカラー部材１８と、このカラー部材１８内に挿通された回転軸１９と、この回転軸１９の先端に一体的に接続され、且つ、内管３内に配置された略円盤状の弁体２０とから構成され、回転軸１９が図外のモータ等により軸周り方向に回転することにより、弁体２０が内管３を開閉するようになっている。
また、カラー部材１８は、その全周に亘って外管２のシェル７に溶接Ｘ４等で固定されている。 The switching unit 5 includes a cylindrical collar member 18 inserted into the inner tube 3 from the shell 7 of the outer tube 2 through the chamber R1, a rotating shaft 19 inserted into the collar member 18, and the rotating shaft 19 And a substantially disc-like valve body 20 that is integrally connected to the tip of the inner tube 3 and disposed in the inner tube 3, and the rotating shaft 19 is rotated in the direction around the axis by a motor or the like not shown in the drawing, The valve body 20 opens and closes the inner pipe 3.
The collar member 18 is fixed to the shell 7 of the outer tube 2 by welding X4 or the like over the entire circumference.

排気熱回収部４には、両端部が両仕切り部10,11に挿通し固定された複数（本実施例では２０個）の熱交換パイプ２１と、外管２の径方向に対向する位置で、且つ、シェル７の軸方向にオフセットした位置からそれぞれ室Ｒ２に連通した流入管２２及び排出管２３が設けられている。
また、図２に示すように、本実施例１では熱交換パイプ２１が内管３を中心として放射線状に複数配置されている。
さらに、流入管２２と排気管はそれぞれの全周に亘って外管２のシェル７に溶接Ｘ５等でそれぞれ固定される他、各仕切り部10,11と各熱交換パイプ２１、及び各仕切り部10,11とシェル１３はそれぞれ図示を省略する溶接等で固定されている。 The exhaust heat recovery section 4 has a plurality (20 in this embodiment) of heat exchange pipes 21 whose both ends are inserted and fixed in the partition sections 10 and 11, and a position facing the radial direction of the outer tube 2. In addition, an inflow pipe 22 and an exhaust pipe 23 that are respectively communicated with the chamber R2 from a position offset in the axial direction of the shell 7 are provided.
Further, as shown in FIG. 2, in the first embodiment, a plurality of heat exchange pipes 21 are arranged radially with the inner tube 3 as the center.
Further, the inflow pipe 22 and the exhaust pipe are respectively fixed to the shell 7 of the outer pipe 2 by welding X5 or the like over the entire circumference, and the partition portions 10 and 11, the heat exchange pipes 21, and the partition portions. 10 and 11 and shell 13 are being fixed by welding etc. which omit illustration, respectively.

消音部６には、室Ｒと室Ｒ４が設けられる他、室Ｒ３にはグラスファイバー等を素材とする吸音部材２４が充填される一方、仕切り部１２には室R3,R4同士を連通状態とする複数のパンチング孔２５が形成されている。   The silencer 6 is provided with a chamber R and a chamber R4, and the chamber R3 is filled with a sound absorbing member 24 made of glass fiber or the like, while the partitioning portion 12 is connected to the chambers R3 and R4. A plurality of punching holes 25 are formed.

従って、室Ｒ３は排気熱回収部４の各熱交換パイプ２１と内管３のパンチング孔１６の両方に連通される一方、室Ｒ４は室Ｒ３を介して排気熱回収部４の各熱交換パイプ２１と内管３のパンチング孔１７の両方に連通されている。   Accordingly, the chamber R3 is communicated with both the heat exchange pipes 21 of the exhaust heat recovery unit 4 and the punching holes 16 of the inner tube 3, while the chamber R4 is communicated with the heat exchange pipes of the exhaust heat recovery unit 4 via the chamber R3. 21 and the punching hole 17 of the inner tube 3 communicate with each other.

その他、本実施例１の排気熱回収マフラ１は吸音部材２４を除く各構成部材が全て金属製となっている。   In addition, in the exhaust heat recovery muffler 1 of the first embodiment, all the constituent members except the sound absorbing member 24 are made of metal.

次に、作用を説明する。
このように構成された排気熱回収マフラ１では、内管３の一端部がエンジン側の接続管（図示せず）に接続される一方、他端部がメインマフラ側の接続管（図示せず）に接続される。
また、流入管２２及び排出管２３が図示しない排気熱の利用先の接続管にそれぞれ接続される。 Next, the operation will be described.
In the exhaust heat recovery muffler 1 configured in this way, one end of the inner pipe 3 is connected to a connection pipe (not shown) on the engine side, while the other end is a connection pipe (not shown) on the main muffler side. ).
Further, the inflow pipe 22 and the exhaust pipe 23 are connected to connection pipes of exhaust heat utilization destinations (not shown).

そして、排気熱の回収時には、図３に示すように、制御バルブの弁体２０が閉じられると共に、排気熱の利用先から流入管２２を介して排気ガスよりも低温な熱交換媒体（一点鎖線矢印で図示）が室Ｒ２に流入した後、排出管２３から再び排気熱の利用先へ排出される。   At the time of exhaust heat recovery, as shown in FIG. 3, the valve body 20 of the control valve is closed, and a heat exchange medium (one-dot chain line) that is lower in temperature than the exhaust gas from the exhaust heat usage destination via the inflow pipe 22. After flowing into the chamber R2, the exhaust pipe 23 again discharges the exhaust heat to the use destination.

そして、内管３の一端部から流入した排気ガス（破線矢印で図示）はパンチング孔１５を介して室Ｒ１に流入した後、各熱交換パイプ２１を介して室Ｒ３に流入する。   Then, exhaust gas (shown by a broken line arrow) that flows from one end of the inner pipe 3 flows into the chamber R1 through the punching hole 15, and then flows into the chamber R3 through the heat exchange pipes 21.

この際、排気ガスは室Ｒ２に流入した熱交換媒体に熱を奪われて低温化する一方、熱交換媒体は高温化され、これによって排気熱を回収できる。
また、排気ガスと熱交換媒体が対向流となり、熱交換率を促進できる。
また、低温化に伴う体積減少により排気ガスを消音できる。
さらに、室Ｒ３の吸音部材２４による音エネルギーの分散・吸収作用により排気ガスを消音できる。 At this time, the exhaust gas is deprived of heat by the heat exchange medium flowing into the chamber R2 and lowered in temperature, while the heat exchange medium is raised in temperature and thereby the exhaust heat can be recovered.
Further, the exhaust gas and the heat exchange medium become a counter flow, and the heat exchange rate can be promoted.
Further, the exhaust gas can be silenced due to the volume reduction accompanying the low temperature.
Further, the exhaust gas can be silenced by the sound energy dispersing / absorbing action of the sound absorbing member 24 in the chamber R3.

室Ｒ３の排気ガスは、仕切り部１２のパンチング孔２５を介して消音室Ｒ４に流入した後、内管３のパンチング孔１７を介して内管３の他端部へ排出される。   The exhaust gas in the chamber R3 flows into the silencer chamber R4 through the punching hole 25 of the partition part 12, and then is discharged to the other end of the inner tube 3 through the punching hole 17 of the inner tube 3.

この際、パンチング孔25,17の拡縮作用により排気ガスを消音できる。
なお、本実施例１では、室Ｒ３内の排気ガスは流通抵抗の関係から略全量が直線的に流通してパンチング孔２５へ向かうが、パンチング孔２５を省略してパンチング孔１６へ向かわせても良い。 At this time, the exhaust gas can be silenced by the expansion / contraction action of the punching holes 25 and 17.
In the first embodiment, the exhaust gas in the chamber R3 almost linearly flows toward the punching hole 25 because of the flow resistance, but the punching hole 25 is omitted and is directed toward the punching hole 16. Also good.

従って、本実施例１では、消音部６によって排気熱回収時に排気ガスの排気騒音を低減できる。   Therefore, in the first embodiment, the silencer 6 can reduce the exhaust noise of the exhaust gas at the time of exhaust heat recovery.

一方、図４に示すように、排気熱の非回収時においては、制御バルブの弁体２０が開くことにより、内管３の一端部から流入した排気ガス（破線矢印で図示）の略全量が内管３の他端部へ直線的に通過する。   On the other hand, as shown in FIG. 4, when exhaust heat is not recovered, the valve body 20 of the control valve opens, so that substantially the entire amount of exhaust gas (shown by broken line arrows) flowing in from one end of the inner pipe 3 is reduced. It passes linearly to the other end of the inner tube 3.

この際、断熱空間１４によって排気ガスの熱が室Ｒ２の熱交換媒体に伝熱するのを防止でき、排気熱の非回収時に熱交換媒体が高温化するのを防止できる。
また、排気ガスの音エネルギーをパンチング孔１６から室Ｒ３に流入させて吸音部材２４による音エネルギーの分散・吸収作用により排気ガスを消音できる。
加えて、排気ガスの音エネルギーをパンチング孔１７から室Ｒ４に流入させて共鳴作用を得ることにより排気ガスを消音できる。 At this time, the heat of the exhaust gas can be prevented from being transferred to the heat exchange medium in the chamber R2 by the heat insulating space 14, and the heat exchange medium can be prevented from being heated at a time when the exhaust heat is not recovered.
Further, the sound energy of the exhaust gas can be flown into the chamber R3 from the punching hole 16, and the exhaust gas can be silenced by the sound energy dispersing and absorbing action by the sound absorbing member 24.
In addition, the exhaust gas can be silenced by flowing the sound energy of the exhaust gas from the punching hole 17 into the chamber R4 to obtain a resonance effect.

なお、制御バルブの弁体２０の開閉量や開閉のタイミングは回収した排気熱の用途に応じて適宜設定できる。
また、排気熱の非回収時に熱交換媒体を流通させるかどうかは任意である。 The opening / closing amount and opening / closing timing of the valve body 20 of the control valve can be appropriately set according to the use of the recovered exhaust heat.
Whether or not the heat exchange medium is circulated when exhaust heat is not recovered is arbitrary.

次に、効果を説明する。
以上、説明したように、本実施例１の排気熱回収マフラ１にあっては、排気ガスが通過する内管３と、内管３の外側に配置される外管２と、内管３と外管２の間に配置され、且つ、排気ガスと熱交換媒体との間で熱交換を行うことにより排気熱を回収する排気熱回収部４と、外管２を貫通した状態で排気熱回収部４へ熱交換媒体を供給する流入管２２と、外管２を貫通した状態で排気熱回収部４から熱交換媒体を排出する排出管２３と、内管３と排気熱回収部４に排気ガスの流れを切り換える切換部５を備える排気熱回収マフラ１において、排気熱回収部４と内管３の両方に連通し、該排気熱回収部４または内管３を通過する排気ガスの排気騒音を切換部５の切り換えに関わらず低減する消音部６を備えるため、排気熱の非回収時に加えて、排気熱の回収時にも排気ガスの排気騒音を低減できる。 Next, the effect will be described.
As described above, in the exhaust heat recovery muffler 1 of the first embodiment, the inner tube 3 through which the exhaust gas passes, the outer tube 2 disposed outside the inner tube 3, the inner tube 3, An exhaust heat recovery unit 4 that is disposed between the outer tubes 2 and recovers exhaust heat by exchanging heat between the exhaust gas and the heat exchange medium, and exhaust heat recovery in a state of passing through the outer tube 2 An inflow pipe 22 for supplying a heat exchange medium to the section 4, a discharge pipe 23 for discharging the heat exchange medium from the exhaust heat recovery section 4 through the outer pipe 2, and exhausting to the inner pipe 3 and the exhaust heat recovery section 4 In an exhaust heat recovery muffler 1 including a switching unit 5 for switching a gas flow, exhaust noise of exhaust gas that communicates with both the exhaust heat recovery unit 4 and the inner pipe 3 and passes through the exhaust heat recovery unit 4 or the inner pipe 3. In addition to the non-recovery of the exhaust heat, the silencer 6 is provided to reduce the noise regardless of the switching of the switching unit 5, Even at the time of the recovery of the gas heat can reduce the exhaust noise of the exhaust gas.

以上、本実施例を説明してきたが、本発明は上述の実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等があっても、本発明に含まれる。
例えば、各構成部材の詳細な部位の構造、熱交換媒体の種類、及び回収した排気熱の用途（排気熱の利用先）等については適宜設定でき、例えば、熱交換媒体をラジエータの冷却水としてオイルウォーマーやヒータコアに利用したり、ランキンシステムの媒体として用いることは当然考えられる。 Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.
For example, the detailed structure of each component, the type of heat exchange medium, and the use of recovered exhaust heat (use of exhaust heat) can be set as appropriate. For example, the heat exchange medium can be used as cooling water for a radiator. Of course, it can be used for oil warmers and heater cores, or as a medium for Rankine systems.

また、熱交換パイプ２１の形状や配置等についても適宜設定でき、例えば、図５に示すように渦巻き状に配置しても良く、この場合、小スペースで排気ガスの流通断面積を確保できる。   Further, the shape, arrangement, and the like of the heat exchange pipe 21 can be set as appropriate. For example, the heat exchange pipe 21 may be arranged in a spiral shape as shown in FIG. 5, and in this case, the exhaust gas flow cross-sectional area can be secured in a small space.

本発明の実施例１の排気熱回収マフラを示す側断面図である。It is a sectional side view which shows the exhaust heat recovery muffler of Example 1 of this invention. 図１のＳ２−Ｓ２線における断面図である。It is sectional drawing in the S2-S2 line | wire of FIG. 本実施例１の排気熱回収時の作用を説明する図である。It is a figure explaining the effect | action at the time of the exhaust heat recovery of the present Example 1. FIG. 本実施例１の排気熱回収時の作用を説明する図である。It is a figure explaining the effect | action at the time of the exhaust heat recovery of the present Example 1. FIG. その他の実施例の熱交換パイプの配置を説明する断面図である。It is sectional drawing explaining arrangement | positioning of the heat exchange pipe of another Example.

符号の説明Explanation of symbols

Ｘ１、Ｘ２、Ｘ３、Ｘ４ 溶接
Ｒ１、Ｒ２、Ｒ３、Ｒ４ 室
１ 排気熱回収マフラ
２ 外管
３ 内管
４ 排気熱回収部
５ 切換部
６ 消音部
７ シェル
８、９ エンドプレート
１０、１１、１２ 仕切り部
１３ シェル
１４ 断熱空間
１５、１６、１７ パンチング孔
１８ カラー部材
１９ 回転軸
２０ 弁体
２１ 熱交換パイプ
２２ 流入管
２３ 排出管
２４ 吸音部材
２５ パンチング孔 X1, X2, X3, X4 Welding R1, R2, R3, R4 Chamber 1 Exhaust heat recovery muffler 2 Outer tube 3 Inner tube 4 Exhaust heat recovery unit 5 Switching unit 6 Silencing unit 7 Shell 8, 9 End plates 10, 11, 12 Partition 13 Shell 14 Thermal insulation space 15, 16, 17 Punching hole 18 Collar member 19 Rotating shaft 20 Valve body 21 Heat exchange pipe 22 Inflow pipe 23 Outlet pipe 24 Sound absorbing member 25 Punching hole

Claims (1)

排気ガスが通過する内管と、
前記内管の外側に配置される外管と、
前記内管と外管の間に配置され、且つ、排気ガスと熱交換媒体との間で熱交換を行うことにより排気熱を回収する排気熱回収部と、
前記外管を貫通した状態で排気熱回収部へ熱交換媒体を供給する流入管と、
前記外管を貫通した状態で排気熱回収部から熱交換媒体を排出する排出管と、
前記内管と前記排気熱回収部に排気ガスの流れを切り換える切換部を備える排気熱回収マフラにおいて、
前記排気熱回収部と内管の両方に連通し、該排気熱回収部または内管を通過する排気ガスの排気騒音を前記切換部の切り換えに関わらず低減する消音部を備えることを特徴とする排気熱回収マフラ。 An inner pipe through which exhaust gas passes;
An outer tube disposed outside the inner tube;
An exhaust heat recovery unit that is disposed between the inner pipe and the outer pipe and recovers exhaust heat by performing heat exchange between the exhaust gas and the heat exchange medium;
An inflow pipe for supplying a heat exchange medium to the exhaust heat recovery section in a state of penetrating the outer pipe;
A discharge pipe for discharging the heat exchange medium from the exhaust heat recovery section in a state of penetrating the outer pipe;
In the exhaust heat recovery muffler comprising a switching unit that switches the flow of exhaust gas to the inner pipe and the exhaust heat recovery unit,
A silencer that communicates with both the exhaust heat recovery unit and the inner pipe and that reduces exhaust noise of exhaust gas that passes through the exhaust heat recovery unit or the inner pipe regardless of switching of the switching unit is provided. Exhaust heat recovery muffler.
JP2007075806A 2007-03-23 2007-03-23 Exhaust gas heat recovering muffler Pending JP2008232084A (en)

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JP2011185151A (en) * 2010-03-08 2011-09-22 National Maritime Research Institute Exhaust heat collection silencer and exhaust heat collection silencer system
DE102012202390A1 (en) * 2012-02-16 2013-08-22 Eberspächer Exhaust Technology GmbH & Co. KG Heat exchanger device i.e. exhaust gas heat exchanger device, for exhaust system of combustion engine in motor car, has heat exchanger channel enclosing bypass channel, and heat exchanger arranged helically around bypass channel
JP2013213435A (en) * 2012-04-02 2013-10-17 Yutaka Giken Co Ltd Exhaust heat recovery device
CN113914971A (en) * 2021-08-16 2022-01-11 宁波亿超消音科技有限公司 Silencer

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ITBO20100474A1 (en) 2010-07-27 2012-01-28 Magneti Marelli Spa SILENCER WITH INTEGRATED HEAT EXCHANGER
EP2463490B1 (en) * 2010-12-10 2015-09-09 Perkins Engines Company Limited Improvements in or relating to gas coolers for internal combustion engines
ITBO20120626A1 (en) 2012-11-15 2014-05-16 Magneti Marelli Spa HEAT EXCHANGER WITH THERMAL ENERGY RECOVERY FOR AN INTERNAL COMBUSTION ENGINE EXHAUST SYSTEM
EP3293379B1 (en) 2016-09-12 2019-04-17 Volvo Car Corporation Combined heat exchanger and exhaust silencer

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JP4566055B2 (en) * 2004-09-10 2010-10-20 フタバ産業株式会社 Exhaust heat recovery muffler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007032561A (en) * 2005-06-20 2007-02-08 Sango Co Ltd Exhaust gas heat recovery device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185151A (en) * 2010-03-08 2011-09-22 National Maritime Research Institute Exhaust heat collection silencer and exhaust heat collection silencer system
DE102012202390A1 (en) * 2012-02-16 2013-08-22 Eberspächer Exhaust Technology GmbH & Co. KG Heat exchanger device i.e. exhaust gas heat exchanger device, for exhaust system of combustion engine in motor car, has heat exchanger channel enclosing bypass channel, and heat exchanger arranged helically around bypass channel
DE102012202390B4 (en) * 2012-02-16 2016-02-18 Eberspächer Exhaust Technology GmbH & Co. KG Heat exchanger system for an exhaust system of an internal combustion engine
JP2013213435A (en) * 2012-04-02 2013-10-17 Yutaka Giken Co Ltd Exhaust heat recovery device
CN113914971A (en) * 2021-08-16 2022-01-11 宁波亿超消音科技有限公司 Silencer

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