JP6251583B2 - Exhaust heat recovery unit - Google Patents

Exhaust heat recovery unit Download PDF

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JP6251583B2
JP6251583B2 JP2014015112A JP2014015112A JP6251583B2 JP 6251583 B2 JP6251583 B2 JP 6251583B2 JP 2014015112 A JP2014015112 A JP 2014015112A JP 2014015112 A JP2014015112 A JP 2014015112A JP 6251583 B2 JP6251583 B2 JP 6251583B2
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exhaust
heat recovery
heat
recovery material
recovery device
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JP2015140756A (en
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洋平 一柳
洋平 一柳
出居　一博
一博 出居
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Calsonic Kansei Corp
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Priority to JP2014015112A priority Critical patent/JP6251583B2/en
Priority to CN201480074497.XA priority patent/CN105940198B/en
Priority to PCT/JP2014/082252 priority patent/WO2015114949A1/en
Priority to US15/115,036 priority patent/US10648746B2/en
Priority to DE112014006300.2T priority patent/DE112014006300T5/en
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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
    • 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

Description

本発明は、排気熱回収器に係り、自動車等の排気の熱を回収するものに関する。   The present invention relates to an exhaust heat recovery device, and more particularly to an exhaust heat recovery device that recovers heat of exhaust from an automobile or the like.

従来、排気の流れをコントロールするバルブによって、熱を回収する必要があるとき（たとえば、冬季等で暖房に使用するとき）には、熱回収室で排気熱を回収し、熱の回収が不要であるときには、迂回路に排気を流すことで排気をそのまま廃棄する構成の排気熱回収器が知られている（たとえば、特許文献１参照）。   Conventionally, when heat needs to be recovered by a valve that controls the flow of exhaust (for example, when used for heating in winter), exhaust heat is recovered in the heat recovery chamber, and heat recovery is not required. In some cases, an exhaust heat recovery device is known in which the exhaust gas is discarded as it is by flowing the exhaust gas through a bypass (see, for example, Patent Document 1).

特開２０１０−２２９８４７号公報JP 2010-229847 A

本発明は、熱媒体を用いて排気から熱を回収する排気熱回収器において、熱回収効率の低下を防ぐことができるものを提供することを目的とする。   An object of the present invention is to provide an exhaust heat recovery unit that recovers heat from exhaust using a heat medium, and that can prevent a decrease in heat recovery efficiency.

請求項１に記載の発明は、排気が流れる排気管と、前記排気管に設けられ、前記排気の熱を回収する熱回収材と、前記熱回収材の外側を囲むように形成されており、熱媒体が流れる熱媒体流路と、前記熱回収材に設けられている複数の排気通路と、前記排気管に設けられており、前記複数の排気通路のうち前記熱媒体流路に隣接する前記排気通路への排気の流れを抑制する排気抑制部とを有し、前記各排気通路は、お互いが独立して貫通している排気熱回収器である。 The invention according to claim 1 is formed so as to surround an exhaust pipe through which exhaust flows, a heat recovery material provided in the exhaust pipe for recovering heat of the exhaust, and an outside of the heat recovery material , A heat medium flow path through which the heat medium flows, a plurality of exhaust passages provided in the heat recovery material, and provided in the exhaust pipe, and adjacent to the heat medium flow path among the plurality of exhaust passages An exhaust gas suppression unit that suppresses the flow of exhaust gas to the exhaust passage, and each of the exhaust passages is an exhaust heat recovery unit that penetrates each other independently.

請求項６に記載の発明は、請求項１に記載の排気熱回収器において、前記排気抑制部は、前記排気の流れ方向上流側で、前記熱回収材に隣接しているリング状の部材で構成されている排気熱回収器である。 The invention according to claim 6 is the exhaust heat recovery device according to claim 1, wherein the exhaust suppression portion is a ring-shaped member adjacent to the heat recovery material on the upstream side in the exhaust flow direction. It is the comprised exhaust heat recovery device.

請求項３に記載の発明は、請求項２に記載の排気熱回収器において、前記熱回収材は、筒状の熱回収材支持体の内部で、前記熱回収材支持体の中間部に設けられており、前記縮径部は、前記熱回収材支持体内に入り込んでいる排気熱回収器である。   According to a third aspect of the present invention, in the exhaust heat recovery device according to the second aspect, the heat recovery material is provided in an intermediate portion of the heat recovery material support inside the cylindrical heat recovery material support. The reduced diameter portion is an exhaust heat recovery device that has entered the heat recovery material support.

請求項４に記載の発明は、請求項２または請求項３に記載の排気熱回収器において、前記縮径部は、前記熱回収材側で内径が小さくなっているテーパ状に形成されている排気熱回収器である。   According to a fourth aspect of the present invention, in the exhaust heat recovery device according to the second or third aspect, the reduced diameter portion is formed in a tapered shape having a smaller inner diameter on the heat recovery material side. Exhaust heat recovery device.

請求項５に記載の発明は、請求項２または請求項３に記載の排気熱回収器において、前記縮径部は、内径と外径とが一定であって前記熱回収材の外径よりも小さい筒状に形成されている排気熱回収器である。   According to a fifth aspect of the present invention, in the exhaust heat recovery device according to the second or third aspect, the reduced diameter portion has a constant inner diameter and an outer diameter and is larger than an outer diameter of the heat recovery material. It is an exhaust heat recovery device formed in a small cylindrical shape.

請求項６に記載の発明は、請求項１に記載の排気熱回収器において、前記排気抑制部は、前記排気の流れ方向上流側で、前記回収部材に隣接しているリング状の部材で構成されている排気熱回収器である。   According to a sixth aspect of the present invention, in the exhaust heat recovery device according to the first aspect, the exhaust suppression unit is a ring-shaped member adjacent to the recovery member on the upstream side in the exhaust flow direction. It is an exhaust heat recovery device.

請求項７に記載の発明は、請求項１に記載の排気熱回収器において、複数の排気通路が前記熱回収材の中央部側にのみ設けられていることで、前記排気抑制部が構成されている排気熱回収器である。   According to a seventh aspect of the present invention, in the exhaust heat recovery device according to the first aspect, the exhaust suppression unit is configured by providing a plurality of exhaust passages only on a central portion side of the heat recovery material. It is an exhaust heat recovery device.

本発明によれば、熱媒体を用いて排気から熱を回収する排気熱回収器において、熱回収効率の低下を防ぐことができるものを提供することができるという効果を奏する。   Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to provide an exhaust heat recovery device that recovers heat from exhaust using a heat medium and that can prevent a decrease in heat recovery efficiency.

本発明の実施形態に係る排気熱回収器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the exhaust heat recovery device which concerns on embodiment of this invention. 図１におけるＩＩ−ＩＩ断面を示す図である。It is a figure which shows the II-II cross section in FIG. 図１におけるＩＩＩ−ＩＩＩ断面を示す図である。It is a figure which shows the III-III cross section in FIG. 変形例に係る排気熱回収器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the exhaust heat recovery device which concerns on a modification. 変形例に係る排気熱回収器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the exhaust heat recovery device which concerns on a modification. 変形例に係る排気熱回収器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the exhaust heat recovery device which concerns on a modification.

本発明の実施形態に係る排気熱回収器１は、たとえば、自動車の排気（排気ガス）の熱を回収するものであり、図１で示すように、排気管３と熱回収材（蓄熱材）５と熱媒体流路（液体熱媒体流路）７と排気抑制部（排気遮断部）９とを備えて構成されている。   The exhaust heat recovery device 1 according to the embodiment of the present invention recovers the heat of, for example, automobile exhaust (exhaust gas), and as shown in FIG. 1, the exhaust pipe 3 and the heat recovery material (heat storage material). 5, a heat medium flow path (liquid heat medium flow path) 7, and an exhaust suppression unit (exhaust cutoff unit) 9.

排気管３の内部には、図１に矢印で示すように排気が流れるようになっている。熱回収材５には、複数の排気通路１１が設けられている。熱回収材５は、外周が排気管３の内壁に接するようにして排気管３の内部に設置されており、排気通路１１を流れる排気の熱を回収するようになっている。   Exhaust gas flows through the exhaust pipe 3 as indicated by arrows in FIG. A plurality of exhaust passages 11 are provided in the heat recovery material 5. The heat recovery material 5 is installed inside the exhaust pipe 3 so that the outer periphery is in contact with the inner wall of the exhaust pipe 3, and recovers the heat of the exhaust gas flowing through the exhaust passage 11.

熱回収材５は、排気管３内の排気の流れ方向（排気管３の中心軸の延伸方向；図１の左右方向）で、排気管３内の中間部に設けられており、熱回収材５の外周の全周は、排気管３の内周面に接触している。そして、排気の総てが、熱回収材５の排気通路１１を通って、排気管３内を流れるようになっている。   The heat recovery material 5 is provided at an intermediate portion in the exhaust pipe 3 in the flow direction of the exhaust gas in the exhaust pipe 3 (the extending direction of the central axis of the exhaust pipe 3; the left-right direction in FIG. 1). The entire outer periphery of 5 is in contact with the inner peripheral surface of the exhaust pipe 3. Then, all of the exhaust gas flows through the exhaust pipe 3 through the exhaust passage 11 of the heat recovery material 5.

排気通路１１は、貫通孔で構成されている。貫通孔は、排気管３の中心軸の延伸方向に延びており、排気の流れ方向で熱回収材５よりも上流側に位置している排気管３の内部と、排気の流れ方向で熱回収材５よりも下流側に位置している排気管３の内部とをお互いにつないでいる。また、各貫通孔は、排気管３の中心軸の延伸方向から見ると、ほぼ均等に分散しており、熱回収材５で回収された熱が排気管３に伝わるようになっている。   The exhaust passage 11 is configured by a through hole. The through hole extends in the extending direction of the central axis of the exhaust pipe 3, and the inside of the exhaust pipe 3 located upstream of the heat recovery material 5 in the exhaust flow direction and heat recovery in the exhaust flow direction. The inside of the exhaust pipe 3 positioned downstream of the material 5 is connected to each other. Further, each through-hole is almost uniformly dispersed when viewed from the extending direction of the central axis of the exhaust pipe 3, so that the heat recovered by the heat recovery material 5 is transmitted to the exhaust pipe 3.

熱媒体流路７は、熱回収材５の外周の外側（排気管３の外周の外側）に設けられている。熱媒体流路７には、熱回収材５で回収された熱を回収する熱媒体（水もしくは油等の液体状の熱媒体）が流れるようになっている。   The heat medium flow path 7 is provided outside the outer periphery of the heat recovery material 5 (outside the outer periphery of the exhaust pipe 3). A heat medium (liquid heat medium such as water or oil) that recovers the heat recovered by the heat recovery material 5 flows through the heat medium flow path 7.

さらに説明すると、熱媒体流路７は、環状に形成されており、排気管３の中心軸の延伸方向から見ると、図２で示すように、熱回収材５や排気管３の外側で、熱回収材５を囲むように設けられている。そして、熱回収材５で回収され排気管３を伝わってきた熱を回収する熱媒体が熱媒体流路７を流れるようになっている。   More specifically, the heat medium flow path 7 is formed in an annular shape. When viewed from the extending direction of the central axis of the exhaust pipe 3, as shown in FIG. 2, on the outside of the heat recovery material 5 and the exhaust pipe 3, It is provided so as to surround the heat recovery material 5. A heat medium that recovers the heat recovered by the heat recovery material 5 and transmitted through the exhaust pipe 3 flows through the heat medium flow path 7.

排気抑制部９は、熱回収材５の外周部に位置している排気通路１１での排気の流れを抑制する（たとえば、遮断する）ように構成されている。すなわち、図３で示す円Ｃ１と円Ｃ２との間で斜線によって示されたリング状の部位での排気の流れを抑制するように構成されている。   The exhaust suppression unit 9 is configured to suppress (for example, block) the flow of exhaust in the exhaust passage 11 located on the outer peripheral portion of the heat recovery material 5. That is, it is configured to suppress the flow of exhaust gas in a ring-shaped portion indicated by oblique lines between the circle C1 and the circle C2 shown in FIG.

排気抑制部９は、筒状の縮径部１３で構成されている。縮径部１３は、熱回収材５よりも排気の流れ方向上流側に設けられている。縮径部１３の内径は熱回収材５の外径よりも小さくなっている。これにより、熱回収材５の外周部に位置している排気通路１１での排気の流れが抑制されるようになっている。   The exhaust suppression unit 9 is configured by a cylindrical reduced diameter portion 13. The reduced diameter portion 13 is provided upstream of the heat recovery material 5 in the exhaust flow direction. The inner diameter of the reduced diameter portion 13 is smaller than the outer diameter of the heat recovery material 5. Thereby, the flow of the exhaust gas in the exhaust passage 11 located on the outer peripheral portion of the heat recovery material 5 is suppressed.

また、熱回収材５は、排気管３の一部を構成している筒状の熱回収材支持体１５の内部で、熱回収材支持体１５の中間部（熱回収材支持体１５の中心軸の延伸方向の中間部）に設けられている。縮径部１３の外径は、熱回収材支持体１５の内径よりも小さくなっており、縮径部１３は、熱回収材支持体１５と同軸で熱回収材支持体１５内に入り込んでいる。すなわち、図１において、縮径部１３の右端が熱回収材支持体１５の左端よりも右側に位置している。   Further, the heat recovery material 5 is disposed inside the cylindrical heat recovery material support 15 constituting a part of the exhaust pipe 3, in the middle portion of the heat recovery material support 15 (the center of the heat recovery material support 15. It is provided in the middle part of the extending direction of the shaft). The outer diameter of the reduced diameter portion 13 is smaller than the inner diameter of the heat recovery material support 15, and the reduced diameter portion 13 is coaxial with the heat recovery material support 15 and enters the heat recovery material support 15. . That is, in FIG. 1, the right end of the reduced diameter portion 13 is located on the right side of the left end of the heat recovery material support 15.

また、縮径部１３は、熱回収材５側（排気の流れの下流側）で内径が小さくなっているテーパ状に形成されている。   The reduced diameter portion 13 is formed in a tapered shape having an inner diameter that is smaller on the heat recovery material 5 side (downstream side of the exhaust flow).

排気管３は、たとえば、薄肉円筒状に形成されており、熱回収材５よりも排気の流れ方向上流側に設けられている筒状の上流側部位（上流側排気管）１７と、熱回収材５や熱媒体流路７のところに位置している中間部位１９と、熱回収材５よりも排気の流れ方向下流側に設けられている筒状の下流側部位（下流側排気管）２１とを備えて構成されている。上流側部位１７と中間部位１９と下流側部位２１とは、それぞれが別体で構成されている。   The exhaust pipe 3 is formed in, for example, a thin cylindrical shape, and has a cylindrical upstream portion (upstream exhaust pipe) 17 provided upstream of the heat recovery material 5 in the exhaust flow direction, and heat recovery. An intermediate part 19 located at the material 5 and the heat medium flow path 7 and a cylindrical downstream part (downstream exhaust pipe) 21 provided downstream of the heat recovery material 5 in the exhaust flow direction. And is configured. The upstream portion 17, the intermediate portion 19, and the downstream portion 21 are configured separately from each other.

上流側部位１７は、円筒状の嵌合部２３と縮径部１３とを備えて構成されており、縮径部１３は、円錐台側面状のテーパ状部２５と円筒状の小径部２７とで構成されている。嵌合部２３とテーパ状部２５と小径部２７とは排気の流れ方向でこの順にならんでおり、テーパ状部２５の径は、排気の流れ方向上流側から下流側に向かって、次第に小さくなっている。嵌合部２３の径は、テーパ状部２５の端部の径（排気の流れ方向上流側の端部の径）と等しくなっており、小径部２７の径は、テーパ状部２５の端部の径（排気の流れ方向下流側の端部の径）と等しくなっている。下流側部位２１は、上流側部位１７と同形状で対称に形成されている。   The upstream portion 17 includes a cylindrical fitting portion 23 and a reduced diameter portion 13, and the reduced diameter portion 13 includes a truncated cone-shaped tapered portion 25, a cylindrical small diameter portion 27, and the like. It consists of The fitting portion 23, the tapered portion 25, and the small diameter portion 27 are arranged in this order in the exhaust flow direction, and the diameter of the tapered portion 25 gradually decreases from the upstream side to the downstream side in the exhaust flow direction. ing. The diameter of the fitting portion 23 is equal to the diameter of the end portion of the tapered portion 25 (the diameter of the end portion on the upstream side in the exhaust flow direction), and the diameter of the small diameter portion 27 is the end portion of the tapered portion 25. (The diameter of the end on the downstream side in the exhaust flow direction). The downstream portion 21 is formed in the same shape and symmetry as the upstream portion 17.

中間部位１９は、熱回収材支持体１５で構成された内側中間部位２９と、内側中間部位２９の外側で熱回収材支持体１５とともに熱媒体流路７を構成している熱媒体流路構成体３１の小径部３５で構成された外側中間部位３３とで構成されている。   The intermediate part 19 includes an inner intermediate part 29 constituted by the heat recovery material support 15 and a heat medium flow path structure constituting the heat medium flow path 7 together with the heat recovery material support 15 outside the inner intermediate part 29. It is comprised by the outer side intermediate part 33 comprised by the small diameter part 35 of the body 31. FIG.

熱回収材支持体１５は、円筒状に形成されており、熱回収材支持体１５の内径は、縮径部１３の小径部２７の外径よりも大きくなっている。熱回収材支持体１５の外径は、上流側部位１７の嵌合部２３の外径とほぼ等しくなっている。   The heat recovery material support 15 is formed in a cylindrical shape, and the inner diameter of the heat recovery material support 15 is larger than the outer diameter of the small diameter portion 27 of the reduced diameter portion 13. The outer diameter of the heat recovery material support 15 is substantially equal to the outer diameter of the fitting portion 23 of the upstream portion 17.

熱媒体流路構成体３１は、円筒状の大径部３７と一対の円筒状の小径部３５と一対の連結部４１とで構成されている。一対の小径部３５は、大径部３７の両端に設けられており、連結部４１は、小径部３５と大径部３７とをつないでいる。   The heat medium flow path component 31 includes a cylindrical large diameter portion 37, a pair of cylindrical small diameter portions 35, and a pair of connecting portions 41. The pair of small diameter portions 35 are provided at both ends of the large diameter portion 37, and the connecting portion 41 connects the small diameter portion 35 and the large diameter portion 37.

小径部３５の内径は、熱回収材支持体１５や嵌合部２３の外径と等しくなっている。熱媒体流路構成体３１の長さ寸法（中心軸の延伸方向の寸法）は、熱回収材支持体１５の長さ寸法よりも大きくなっている。   The inner diameter of the small diameter portion 35 is equal to the outer diameter of the heat recovery material support 15 and the fitting portion 23. The length dimension of the heat medium flow path component 31 (the dimension of the central axis in the extending direction) is larger than the length dimension of the heat recovery material support 15.

そして、熱回収材支持体１５が熱媒体流路構成体３１の内側に入り込んでいることで、環状の熱媒体流路７が形成されている。熱媒体流路７の外径は、上流側部位１７の外径よりも大きくなっている。   And since the heat recovery material support 15 has entered the inside of the heat medium flow path structure 31, the annular heat medium flow path 7 is formed. The outer diameter of the heat medium flow path 7 is larger than the outer diameter of the upstream portion 17.

また、熱媒体流路構成体３１の一方の（排気の流れの上流側の）小径部３５は、熱回収材支持体１５より突出しており（図１では左側に突出しており）、熱媒体流路構成体３１の他方の（排気の流れの下流側の）小径部３５も、熱回収材支持体１５より突出している（図１では右側に突出している）。   Further, one small diameter portion 35 (on the upstream side of the exhaust flow) of the heat medium flow path structure 31 projects from the heat recovery material support 15 (projects to the left in FIG. 1), and the heat medium flow The other small diameter portion 35 (on the downstream side of the exhaust flow) of the path structure 31 also projects from the heat recovery material support 15 (projects to the right in FIG. 1).

そして、熱媒体流路構成体３１の一方の小径部３５内に上流側部位１７の嵌合部２３が入り込んで嵌合し、熱媒体流路構成体３１の他方の小径部３５内に下流側部位２１の嵌合部２３が入り込んで嵌合することで、上流側部位１７と中間部位１９の熱媒体流路構成体３１の小径部３５と熱回収材支持体１５と下流側部位２１とによって排気管３が形成されている。なお、上流側部位１７と中間部位１９下流側部位２１とはお互いが同軸になっている。   Then, the fitting portion 23 of the upstream portion 17 enters and fits into the one small diameter portion 35 of the heat medium flow path structure 31, and the downstream side into the other small diameter section 35 of the heat medium flow path structure 31. The fitting part 23 of the part 21 enters and fits, so that the small diameter part 35, the heat recovery material support 15 and the downstream part 21 of the heat medium flow path constituting body 31 of the upstream part 17 and the intermediate part 19 are used. An exhaust pipe 3 is formed. The upstream portion 17 and the intermediate portion 19 and the downstream portion 21 are coaxial with each other.

また、熱媒体流路７には、熱媒体流路７に熱媒体を供給する熱媒体供給口４３と、熱媒体流路７から熱媒体を回収する熱媒体回収口４５が設けられている。   The heat medium flow path 7 is provided with a heat medium supply port 43 that supplies the heat medium to the heat medium flow path 7 and a heat medium recovery port 45 that recovers the heat medium from the heat medium flow path 7.

なお、図１に示す排気熱回収器１において、下流側部位２１の縮径部１３を削除してもよい。   In the exhaust heat recovery device 1 shown in FIG. 1, the reduced diameter portion 13 of the downstream portion 21 may be deleted.

次に、排気熱回収器１の動作について説明する。   Next, the operation of the exhaust heat recovery device 1 will be described.

図１に矢印で示すように、排気管３内を高温の排気が流れており、熱媒体流路７を熱媒体が流れている。   As indicated by arrows in FIG. 1, high-temperature exhaust gas flows through the exhaust pipe 3, and the heat medium flows through the heat medium flow path 7.

排気は、排気管３の上流側部位１７の縮径部１３で若干絞られ、流路面積が狭くなり、図３の円Ｃ１の内側に位置している熱回収材５の排気通路１１を流れる。これにより、熱回収材５の外周部（図３で示す円Ｃ１と円Ｃ２との間で斜線によって示されたリング状の部位）では、排気が流れない。   Exhaust gas is throttled slightly at the reduced diameter portion 13 of the upstream portion 17 of the exhaust pipe 3, the flow area becomes narrow, and flows through the exhaust passage 11 of the heat recovery material 5 located inside the circle C1 in FIG. . As a result, exhaust does not flow at the outer peripheral portion of the heat recovery material 5 (ring-shaped portion indicated by oblique lines between the circle C1 and the circle C2 shown in FIG. 3).

図３の円Ｃ１の内側の排気通路１１を流れた排気は、熱回収材５を加熱し、この熱が、熱回収材支持体１５を通って、熱媒体流路７の熱媒体を加熱し、熱の回収がなされる。   The exhaust gas flowing through the exhaust passage 11 inside the circle C1 in FIG. 3 heats the heat recovery material 5, and this heat passes through the heat recovery material support 15 to heat the heat medium in the heat medium flow path 7. The heat is recovered.

排気熱回収器１によれば、排気抑制部９が設けられているので、熱回収材５の外周部に位置している排気通路１１では排気が流れず、もしくは、流れたとしても僅かに流れる程度になっている。つまり、排気が熱媒体流路７から離れたところを流れ熱媒体流路７の近傍では排気が流れないようになっている。これにより、熱媒体流路７内で熱媒体が排気の熱によって局部的に沸騰することが無くなり、熱回収効率の低下を防ぐことができる。   According to the exhaust heat recovery device 1, since the exhaust suppression unit 9 is provided, the exhaust does not flow in the exhaust passage 11 located on the outer peripheral portion of the heat recovery material 5, or even if it flows, it flows slightly. It is about. That is, the exhaust gas flows away from the heat medium flow channel 7 and does not flow near the heat medium flow channel 7. As a result, the heat medium does not boil locally due to the heat of the exhaust gas in the heat medium flow path 7, and a decrease in heat recovery efficiency can be prevented.

また、排気熱回収器１によれば、排気の流れをコントロールするバルブが設けられておらず迂回路に排気を流さず、排気が熱回収材５のところを常に流れるように構成されているので、熱回収材５や媒体流路７での排気熱の回収を効率良く行うことができる。   Further, according to the exhaust heat recovery device 1, no valve for controlling the flow of exhaust gas is provided, exhaust gas does not flow through the detour, and exhaust gas always flows through the heat recovery material 5. In addition, exhaust heat can be efficiently recovered in the heat recovery material 5 and the medium flow path 7.

また、排気熱回収器１によれば、排気抑制部９が筒状の縮径部１３で構成されており、縮径部１３内を排気が通過するので、排気の流れが安定する（排気の流線が縮径部１３の中心軸の延伸方向と一致する）。これにより、熱回収材５の外周部に位置している排気通路１１に排気が流れることを的確に抑制することができる。   Further, according to the exhaust heat recovery device 1, the exhaust suppressing portion 9 is configured by the cylindrical reduced diameter portion 13, and the exhaust gas passes through the reduced diameter portion 13, so that the flow of the exhaust gas is stabilized (exhaust flow rate). The streamline coincides with the extending direction of the central axis of the reduced diameter portion 13). Thereby, it can suppress exactly that exhaust gas flows into the exhaust passage 11 located in the outer peripheral part of the heat recovery material 5. FIG.

また、排気熱回収器１によれば、縮径部１３が熱回収材支持体１５内に入り込んでいるので、縮径部１３と熱回収材５とが近接しており、熱回収材５の外周部に位置している排気通路１１に排気が流れることを一層的確に抑制することができる。   Further, according to the exhaust heat recovery device 1, since the reduced diameter portion 13 enters the heat recovery material support 15, the reduced diameter portion 13 and the heat recovery material 5 are close to each other. It is possible to more accurately suppress the exhaust from flowing into the exhaust passage 11 located on the outer peripheral portion.

また、排気熱回収器１によれば、縮径部１３が熱回収材５側（排気の流れ方向下流側）で内径が小さいテーパ状に形成されているので、縮径部１３から出た排気が熱回収材５の中央部に集中して流れるようになり、熱回収材５の外周部に位置している排気通路１１に排気が流れることを確実に抑制することができ、局部的な高温部であるヒートスポットの発生を抑えることができ、熱媒体が部分的に沸騰することが無くなる。   Further, according to the exhaust heat recovery device 1, since the reduced diameter portion 13 is formed in a tapered shape with a small inner diameter on the heat recovery material 5 side (downstream in the exhaust flow direction), the exhaust gas that has exited from the reduced diameter portion 13. Is concentrated on the central portion of the heat recovery material 5, and it is possible to reliably suppress the exhaust gas from flowing into the exhaust passage 11 located on the outer peripheral portion of the heat recovery material 5. It is possible to suppress the occurrence of a heat spot, which is a part, and the heat medium does not partially boil.

排気熱回収器１の構成を次に示すように適宜変更してもよい。１つ目の変形例に係る排気熱回収器１を、図４を参照しつつ説明する。   The configuration of the exhaust heat recovery unit 1 may be appropriately changed as follows. An exhaust heat recovery device 1 according to a first modification will be described with reference to FIG.

１つ目の変形例に係る排気熱回収器１は、縮径部１３（上流側部位１７）が、内径と外径とが一定であって熱回収材５の外径よりも小さい筒状（たとえば、円筒状）に形成されている。熱媒体流路７や熱回収材支持体１５の内径は、当然に、縮径部１３の外径よりも大きくなっている。これにより、縮径部１３（上流側部位１７）の製造が容易になる。   In the exhaust heat recovery device 1 according to the first modification, the reduced diameter portion 13 (upstream portion 17) has a cylindrical shape (the inner diameter and the outer diameter are constant and smaller than the outer diameter of the heat recovery material 5). For example, it is formed in a cylindrical shape. Naturally, the inner diameters of the heat medium flow path 7 and the heat recovery material support 15 are larger than the outer diameter of the reduced diameter portion 13. Thereby, manufacture of the reduced diameter part 13 (upstream part 17) becomes easy.

２つ目の変形例に係る排気熱回収器１を、図５を参照しつつ説明する。２つ目の変形例に係る排気熱回収器１では、上流側部位１７のテーパ状の縮径部１３の先端にリング状の鍔部４７が設けられている。下流側部位２１では、縮径部１３が削除されている。   An exhaust heat recovery device 1 according to a second modification will be described with reference to FIG. In the exhaust heat recovery device 1 according to the second modification, a ring-shaped flange 47 is provided at the tip of the tapered diameter-reduced portion 13 of the upstream portion 17. In the downstream region 21, the reduced diameter portion 13 is deleted.

３つ目の変形例に係る排気熱回収器１を、図６を参照しつつ説明する。３つ目の変形例に係る排気熱回収器１では、排気抑制部９が、排気の流れ方向上流側で、熱回収材５に隣接している（たとえば、接触している）リング状の部材４９で構成されている。   An exhaust heat recovery device 1 according to a third modification will be described with reference to FIG. In the exhaust heat recovery device 1 according to the third modification, the exhaust suppression unit 9 is adjacent to (for example, in contact with) the heat recovery material 5 on the upstream side in the exhaust flow direction. 49.

排気抑制部９をリング状の部材４９で構成することで、排気熱回収器１の構成を簡素化することができる。   By configuring the exhaust suppression unit 9 with the ring-shaped member 49, the configuration of the exhaust heat recovery device 1 can be simplified.

４つ目の変形例に係る排気熱回収器（図示せず）は、複数の排気通路１１が熱回収材５の中央部側にのみ設けられていることで、排気抑制部９が構成されている。これにより、排気熱回収器の組立作業やメンテナンス作業が簡素化される。   In the exhaust heat recovery device (not shown) according to the fourth modification, the exhaust suppression portion 9 is configured by providing the plurality of exhaust passages 11 only on the central portion side of the heat recovery material 5. Yes. Thereby, the assembly work and maintenance work of the exhaust heat recovery device are simplified.

なお、上述した各排気熱回収器１は、排気が流れる排気管と、複数の排気通路が設けられており、前記排気管の内部に設置され、前記排気通路を流れる排気の熱を回収する熱回収材と、前記排気管に設けられ、前記熱回収材で回収された熱を回収する熱媒体が流れる熱媒体流路と、前記熱回収材の前記熱媒体流路近傍での前記排気の流れを抑制する排気抑制部とを有する排気熱回収器の例である。   Each of the exhaust heat recovery devices 1 described above is provided with an exhaust pipe through which exhaust flows and a plurality of exhaust passages, and is installed in the exhaust pipe to recover heat of the exhaust flowing through the exhaust passage. A heat recovery medium provided in the exhaust pipe, through which a heat medium that recovers heat recovered by the heat recovery material flows, and a flow of the exhaust gas in the vicinity of the heat medium flow path of the heat recovery material It is an example of the exhaust heat recovery device which has an exhaust_gas | exhaustion suppression part which suppresses.

１ 排気熱回収器
３ 排気管
５ 熱回収材
７ 熱媒体流路
９ 排気抑制部
１１ 排気通路
１３ 縮径部
１５ 熱回収材支持体
４９ リング状の部材 DESCRIPTION OF SYMBOLS 1 Exhaust heat recovery device 3 Exhaust pipe 5 Heat recovery material 7 Heat medium flow path 9 Exhaust suppression part 11 Exhaust passage 13 Reduced diameter part 15 Heat recovery material support body 49 Ring-shaped member

Claims (7)

排気が流れる排気管と、
前記排気管に設けられ、前記排気の熱を回収する熱回収材と、
前記熱回収材の外側を囲むように形成されており、熱媒体が流れる熱媒体流路と、
前記熱回収材に設けられている複数の排気通路と、
前記排気管に設けられており、前記複数の排気通路のうち前記熱媒体流路に隣接する前記排気通路への排気の流れを抑制する排気抑制部と、
を有し、前記各排気通路は、お互いが独立して貫通していることを特徴とする排気熱回収器。 An exhaust pipe through which exhaust flows,
A heat recovery material provided in the exhaust pipe and recovering heat of the exhaust;
Formed so as to surround the heat recovery material, a heat medium flow path through which the heat medium flows, and
A plurality of exhaust passages provided in the heat recovery material;
An exhaust suppression unit that is provided in the exhaust pipe and suppresses an exhaust flow to the exhaust passage adjacent to the heat medium flow path among the plurality of exhaust passages;
And the exhaust passages penetrate each other independently. 請求項１に記載の排気熱回収器において、
前記排気抑制部は、前記熱回収材よりも前記排気の流れ方向上流側に設けられており、内径が前記熱回収材の外径よりも小さい筒状の縮径部で構成されていることを特徴とする排気熱回収器。 The exhaust heat recovery device according to claim 1,
The exhaust suppression portion is provided upstream of the heat recovery material in the exhaust flow direction, and is configured by a cylindrical reduced diameter portion whose inner diameter is smaller than the outer diameter of the heat recovery material. A featured exhaust heat recovery unit. 請求項２に記載の排気熱回収器において、
前記熱回収材は、筒状の熱回収材支持体の内部で、前記熱回収材支持体の中間部に設けられており、前記縮径部は、前記熱回収材支持体内に入り込んでいることを特徴とする排気熱回収器。 The exhaust heat recovery device according to claim 2,
The heat recovery material is provided in an intermediate portion of the heat recovery material support inside the cylindrical heat recovery material support, and the reduced diameter portion enters the heat recovery material support. Exhaust heat recovery device. 請求項２または請求項３に記載の排気熱回収器において、
前記縮径部は、前記熱回収材側で内径が小さくなっているテーパ状に形成されていることを特徴とする排気熱回収器。 In the exhaust heat recovery device according to claim 2 or 3,
The exhaust heat recovery device according to claim 1, wherein the reduced diameter portion is formed in a tapered shape having an inner diameter that is smaller on the heat recovery material side. 請求項２または請求項３に記載の排気熱回収器において、
前記縮径部は、内径と外径とが一定であって前記熱回収材の外径よりも小さい筒状に形成されていることを特徴とする排気熱回収器。 In the exhaust heat recovery device according to claim 2 or 3,
The exhaust diameter heat recovery device is characterized in that the reduced diameter portion is formed in a cylindrical shape having a constant inner diameter and an outer diameter and smaller than the outer diameter of the heat recovery material. 請求項１に記載の排気熱回収器において、
前記排気抑制部は、前記排気の流れ方向上流側で、前記熱回収材に隣接しているリング状の部材で構成されていることを特徴とする排気熱回収器。 The exhaust heat recovery device according to claim 1,
The exhaust heat recovery device is characterized in that the exhaust suppression unit is configured by a ring-shaped member adjacent to the heat recovery material on the upstream side in the exhaust flow direction. 請求項１に記載の排気熱回収器において、
複数の排気通路が前記熱回収材の中央部側にのみ設けられていることで、前記排気抑制部が構成されていることを特徴とする排気熱回収器。 The exhaust heat recovery device according to claim 1,
The exhaust heat recovery device is characterized in that the exhaust suppression unit is configured by providing a plurality of exhaust passages only on the center side of the heat recovery material.
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PCT/JP2014/082252 WO2015114949A1 (en) 2014-01-30 2014-12-05 Exhaust waste heat recovery device
US15/115,036 US10648746B2 (en) 2014-01-30 2014-12-05 Exhaust waste heat recovery device
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