JP6838825B2 - Exhaust heat recovery device - Google Patents

Description

The present invention relates to an exhaust heat recovery device that recovers and uses exhaust heat from an internal combustion engine of an automobile or the like.

Conventionally, there is known a device that heats cooling water with exhaust heat of exhaust generated in an internal combustion engine of an automobile and recovers the exhaust heat. For example, Patent Document 1 describes an exhaust gas introduction section into which exhaust gas generated by an internal combustion engine is introduced, a heat recovery path connected to the upper downstream side of the exhaust gas introduction section, and an exhaust gas introduction section provided below the heat recovery path. A detour connected to the lower part of the downstream side, a heat recovery device mounted on the upper surface of the detour and heating the cooling water with the exhaust gas sent from the heat recovery path, and rotatable upstream or downstream of the detour and the heat recovery path. Disclosed is an exhaust heat recovery device provided in an exhaust gas with a valve that closes either a detour or a heat recovery path to regulate the flow of exhaust gas.

The detour of this exhaust heat recovery device consists of a substantially semi-cylindrical main body connected to the exhaust gas introduction part and a lid part covered with the main body part, and the lid part is welded to the main body part to form a detour. Has been done. A heat recovery path and a heat recovery device are provided above the detour so that they are in contact with the detour, respectively, so that the exhaust heat recovery device can be miniaturized (Patent Document 1 paragraph [0009]). , [0019], [0025], [0029], [0041], see FIGS. 1 to 6).

Japanese Unexamined Patent Publication No. 2012-31796

However, in the exhaust heat recovery device of Patent Document 1, a detour is formed by a substantially semi-cylindrical main body and a lid, and a separate heat recovery path and heat recovery device are provided on the upper side of the detour. Since the structure is such that the heat recovery path and the detour are connected by a separate exhaust gas introduction section, the number of parts is extremely large. Therefore, the number of joints of parts is large, the manufacturing efficiency is inferior, and the manufacturing cost is high. Further, this large number of parts also increases the weight of the exhaust heat recovery device, and is also a factor of reducing fuel consumption when mounted on an automobile for recovering exhaust heat from the exhaust of an internal combustion engine of the automobile, for example.

The present invention is proposed in view of the above problems, and provides an exhaust heat recovery device capable of improving manufacturing efficiency, reducing manufacturing cost, and realizing weight reduction by reducing the number of parts. The purpose is.

The exhaust heat recovery device of the present invention is provided in a substantially tubular fluid introduction section, a substantially tubular fluid lead-out section, and between the fluid introduction section and the fluid lead-out section, and is provided in the fluid introduction section and the fluid lead-out section. A pair of halves having a bulging portion that protrudes laterally in one direction, and having a shape in which the fluid introduction portion, the fluid outlet portion, and the bulging portion are divided into two in the protruding direction of the bulging portion. A substrate formed by joining the substrates, a separator extending in the flow direction of the fluid flowing through the substrate and substantially dividing the inside of the bulging portion into a heat exchange path and a detour, and the substrate are circulated. A tilt valve that can be switched so as to restrict the flow of fluid to either the heat exchange path or the detour, and a plurality of juxtaposed fluids that flow through the heat exchange path are provided so as to flow around. The separator, the tilt valve, and the flow pipe are erected between the half bodies, and the heated fluid flows through the substrate, and the heated fluid is introduced from one of the half bodies. It is characterized in that it circulates in the erection direction of the flow pipe so as to be derived from the other half body side.
According to this, a heat exchange path and a detour can be formed by a substrate formed by joining a pair of halves and a separator that substantially separates the inside of the bulging portion of the substrate, so that the number of parts is small. An exhaust heat recovery device can be formed. Therefore, the number of joining points of the parts is reduced, the manufacturing efficiency can be improved, and the cost of the parts and the cost of the joining work can be reduced to reduce the manufacturing cost. Further, since the number of parts is small, the weight of the exhaust heat recovery device can be reduced. For example, when the exhaust heat recovery device recovers the exhaust heat from the exhaust of the internal combustion engine of an automobile, the weight of the exhaust heat recovery device is light. Fuel efficiency can be improved by the conversion. Further, in a configuration in which a heating fluid such as exhaust flows through the substrate, the exhaust heat recovery device can be easily exhausted by connecting the exhaust pipe or the like on the upstream side to the fluid introduction part and the exhaust pipe or the like on the downstream side to the fluid outlet part. It can be attached to a heating fluid flow system such as a system, and the installation work of the exhaust heat recovery device can be facilitated. Further, the separator, the tilt valve, and the flow pipe can be easily installed on the substrate in cooperation with the work of aligning the pair of halves with each other.

The exhaust heat recovery device of the present invention is provided in a substantially tubular fluid introduction section, a substantially tubular fluid lead-out section, and between the fluid introduction section and the fluid lead-out section, and is provided in the fluid introduction section and the fluid lead-out section. A pair of halves having a bulging portion that protrudes laterally in one direction, and having a shape in which the fluid introduction portion, the fluid outlet portion, and the bulging portion are divided into two in the protruding direction of the bulging portion. A substrate formed by joining the substrates, a separator extending in the flow direction of the fluid flowing through the substrate and substantially dividing the inside of the bulging portion into a heat exchange path and a detour, and the substrate are circulated. A tilt valve that can be switched so as to restrict the flow of fluid to either the heat exchange path or the detour, and a plurality of juxtaposed fluids that flow through the heat exchange path are provided so as to flow around. The separator, the tilt valve, and the flow pipe are erected between the half bodies, and the fluid to be heated flows through the substrate, and the heated fluid is introduced from one of the half bodies. It is characterized in that it circulates in the erection direction of the flow pipe so as to be derived from the other half body side.
According to this, a heat exchange path and a detour can be formed by a substrate formed by joining a pair of halves and a separator that substantially separates the inside of the bulging portion of the substrate, so that the number of parts is small. An exhaust heat recovery device can be formed. Therefore, the number of joining points of the parts is reduced, the manufacturing efficiency can be improved, and the cost of the parts and the cost of the joining work can be reduced to reduce the manufacturing cost. Further, since the number of parts is small, the weight of the exhaust heat recovery device can be reduced. For example, when the exhaust heat recovery device recovers the exhaust heat from the exhaust of the internal combustion engine of an automobile, the weight of the exhaust heat recovery device is light. Fuel efficiency can be improved by the conversion. Further, the separator, the tilt valve, and the flow pipe can be easily installed on the substrate in cooperation with the work of aligning the pair of halves with each other.

The exhaust heat recovery device of the present invention is characterized in that both ends of the flow pipe are fitted and welded to the through hole of one half body and the through hole of the other half body, respectively.
According to this, the flow pipe can be easily and surely positioned with respect to the pair of halves and the substrate, and the flow pipe can be fixed in an erected state.

In the exhaust heat recovery device of the present invention, bearings are provided on one wall portion of the half body and the wall portion of the other half body, respectively, and the shaft portion of the tilt valve is tiltably supported by the bearings on both sides. It is characterized by being.
According to this, the tilt valve can be easily and surely positioned at the position of the bearing with respect to the pair of halves and the substrate, and the tilt valve can be attached in a tiltable state.

In the exhaust heat recovery device of the present invention, the fitting portion provided in the mating portion of one of the half bodies is fitted to the fitted portion provided in the mating portion of the other half body. It is characterized by that.
According to this, one half body and the other half body can be positioned and aligned at an accurate position, and the manufacturing work can be facilitated and the yield can be improved. In addition, the work of erection of the separator, the tilt valve, and the flow pipe at an accurate position between the half bodies can be facilitated.

In the exhaust heat recovery device of the present invention, the flow pipe is a flat pipe, the flat plane of the flat pipe extends in the flow direction of the fluid flowing through the substrate, and the flat pipes are laminated at intervals. It is characterized by being done.
According to this, the flow pipe is used as a flat pipe to increase the surface area, the flat plane of the flat pipe is extended in the flow direction of the fluid to increase the contact area with the fluid, and the flat pipes are laminated at intervals. As a result, the heat exchange area of the flow pipe can be increased to improve the heat exchange efficiency. Further, due to the shape and arrangement of the flat tube, the pressure loss of the fluid flowing through the substrate can be reduced, and a smooth fluid flow can be ensured. For example, when the exhaust gas of an internal combustion engine of an automobile flows through a substrate, the back pressure of the internal combustion engine can be reduced by reducing the pressure loss, and the exhaust efficiency, intake efficiency, and combustion efficiency of the internal combustion engine can be improved.

According to the waste heat recovery device of the present invention, the number of parts can be reduced, the manufacturing efficiency can be improved, the manufacturing cost can be reduced, and the weight can be reduced.

The perspective view of the exhaust heat recovery device of embodiment according to this invention. An exploded perspective view of the exhaust heat recovery device of the embodiment. An exploded perspective view of a state in which the distribution connection unit is removed from the exhaust heat recovery device of the embodiment. The longitudinal explanatory view of the valve open state of the exhaust heat recovery device of an embodiment. The longitudinal explanatory view of the valve closed state of the exhaust heat recovery device of an embodiment.

[Exhaust heat recovery device of the embodiment]
As shown in FIGS. 1 to 5, the waste heat recovery device 1 of the embodiment according to the present invention includes a substantially tubular fluid introduction unit 21, a substantially tubular fluid lead-out unit 22, a fluid introduction unit 21, and a fluid lead-out unit. A base 2 having a bulging portion 23 provided between the portions 22 is provided. The bulging portion 23 bulges outward so that a wide space is formed inside, and the substrate 2 as a whole is formed in a substantially tubular shape having a bulge in the intermediate portion. In the substrate 2 of the present embodiment, the axis of the substantially tubular fluid introduction portion 21 and the axis of the substantially tubular fluid lead-out portion 22 are formed so as to substantially coincide with each other, and the bulging portion 23 is the fluid introduction portion. It is formed so as to project laterally in one direction from 21 and the fluid lead-out unit 22.

The substrate 2 is formed by joining a pair of halves 24a and 24b. The half bodies 24a and 24b have a shape in which the base 2 is divided into two in the axial direction of the fluid introduction portion 21 and the fluid lead-out portion 22 and in the protruding direction of the bulging portion 23, and the half body 24a and the half body 24b are substantially the same. The shape is almost the same size.

The mating portions of the half body 24a and the half body 24b are in contact with each other at the upstream end of the fluid introduction portion 21 and the downstream end of the fluid lead-out portion 22, and are fitted to the intermediate portion thereof. The portion 241a and the fitted portion 241b are formed so as to bulge outward at different heights, and the fitting portion 241a is fitted inside the fitted portion 241b. Then, the contacted end face and the overlapping surface of the fitting portion 241a and the fitted portion 241b or the end portion of the fitted portion 241b are welded by laser welding or the like to join the half body 24a and the half body 24b. , Is integrated as a substrate 2.

A mounting portion 251 is formed at a predetermined position on the wall portion 25 corresponding to the bulging portion 23 of the substrate 2 so as to be recessed inward, and the separator 3 described later is positioned on the mounting portion 251. It will be placed. The mounting portions 251 are formed on each of the half body 24a and the half body 24b, and are provided on both sides of the substrate 2. Further, bearings 26 and 26 are attached to the wall portions 25 and 25 on both sides corresponding to the bulging portions 23 of the substrate 2, in other words, the wall portions 25 of one half body 24a and the wall portions 25 of the other half body 24b, respectively. Is provided, and the shaft portion 42 of the tilt valve 4, which will be described later, is supported by the bearings 26 and 26 on both sides so as to be tiltable.

Further, the wall portions 25 and 25 on both sides corresponding to the bulging portions 23 of the substrate 2, in other words, the wall portions 25 of one half body 24a and the wall portions 25 of the other half body 24b have through holes 27, respectively. 27 is provided. The through hole 27 of the present embodiment is an elongated hole extending in the pipeline direction of the substantially tubular substrate 2, is formed at a position closer to the protruding direction of the bulging portion 23, and corresponds to the wall portions 25 and 25. A plurality of pairs of through holes 27 and 27 are provided at positions at intervals. Both ends of the flow pipe 6, which will be described later, are fitted and welded to the through holes 27 and 27 on both sides.

Inside the bulging portion 23, a separator 3 that substantially divides the inside of the bulging portion 23 into a heat exchange path ER and a detour DR is extended in the flow direction of the fluid flowing through the substrate 2. The separator 3 of the present embodiment has a substantially rectangular tray shape, is provided so that the recesses are on the fluid introduction portion 21 and the fluid lead-out portion 22 side, and the end faces of the side walls 31 and 31 on both sides thereof are mounting portions. It is placed on 251 and 251 and positioned. The positioned separator 3 is provided at a position closer to the protruding side of the bulging portion 23 than the pipeline of the fluid introducing portion 21 and the fluid leading portion 22.

Then, the side walls 31 and 31 of the separator 3 are joined to the wall portions 25 and 25 of the base 2 by laser welding or the like and fixed to the base 2, and the separator 3 is provided so as to be erected between the half bodies 24a and 24b. Has been done. It should be noted that a required slit may be formed in the wall portions 25 and 25 of the half bodies 24a and 24b, and the side walls 31 and 31 of the separator 3 may be pressed against the slits to be fixed by plug welding or fillet welding.

On the upstream side of the separator 3, a tilt valve 4 that can be switched so as to restrict the flow of the fluid flowing through the substrate 2 to either the heat exchange path ER or the detour DR is provided. The tilt valve 4 is composed of a valve plate 41 having a substantially tongue-like shape and a shaft portion 42 fixed to the base of the valve plate 41, and bearings 26 having wall portions 25 and 25 at both ends of the shaft portion 42. The tilt valve 4 is inserted into 26 and is supported so as to be tiltable, and is erected between the half bodies 24a and 24b. The shaft portion 42 of the tilt valve 4 is connected to a thermoactuator 5 on one bearing 26 side, for example, which senses and drives the temperature of the fluid to be heated flowing out of the flow pipe 6 described later. The tilt valve 4 may be provided on the downstream side of the separator 3.

At a position closer to the protruding direction of the bulging portion 23 than the separator 3, a plurality of distribution pipes 6 having the shape of flat pipes are juxtaposed at intervals, and are erected between the halves 24a and 24b. The distribution pipe 6 is extended so that the substantially tubular substrate 2 extends in the pipeline direction, in other words, the flat surface extends in the flow direction of the fluid flowing through the substrate 2, and the plurality of distribution pipes 6 are spaced apart from each other. The fluids that are laminated and flow through the heat exchange path ER are provided so as to flow around.

Both ends of each flow pipe 6 are fitted into the through hole 27 of the wall portion 25 of the half body 24a and the through hole 27 of the wall portion 25 of the half body 24b, and are welded to be joined to the substrate 2. Further, in the present embodiment, a plurality of fins 61 are provided at predetermined intervals in the pipeline direction of the flow pipe 6, and the heat transfer area for heat exchange is increased by the fins 61. However, the fins 61 are provided. Instead, the fluid flow in the heat exchange path ER may be made smoother and the pressure loss may be further reduced.

On the outside of the through holes 27 on both sides, a distribution connection unit 7 for introducing and deriving the fluid to be circulated in the distribution pipe 6 is provided. The distribution connection unit 7 is composed of a connection cover 71 that covers the entire plurality of through holes 27 on one side and a pipe 72 that is connected to the connection cover 71, and the edge portion of the connection cover 71 follows the shape of the base 2. It is arranged so as to be joined to the substrate 2 by welding or the like.

Then, for example, the fluid to be heated is introduced into the flow pipe 6 from the distribution connection unit 7 joined to the half body 24b, and the fluid to be heated is derived from the flow pipe 6 by the distribution connection unit 7 joined to the half body 24a. The heated fluid to be heated and derived is sent from the pipe 72 on the half body 24a side and sent to the thermoactuator 5 that controls the opening / closing operation of the tilt valve 4, and the temperature of the fluid to be heated becomes equal to or higher than a predetermined temperature. When this happens, the tilt valve 4 is opened to stop heating the fluid to be heated.

In the exhaust heat recovery device 1 of the present embodiment, for example, the base 2 is connected to the exhaust pipeline of the internal combustion engine of an automobile to circulate the exhaust gas through the base 2. Further, a fluid to be heated such as cooling water, oil, and air is circulated in the flow pipe 6. Then, when the tilt valve 4 is in the open state, as shown in FIG. 4, the exhaust gas circulates through the detour DR of the substrate 2 of the exhaust heat recovery device 1 as shown by the thick line double-dashed line arrow. Further, when the thermoactuator 5 closes the tilt valve 4 because the temperature of the fluid to be heated drops below a predetermined temperature, as shown in FIG. 5, the heat exchange path ER of the base 2 of the exhaust heat recovery device 1 The exhaust circulates as shown by the thick line two-point chain line arrow, and heats the fluid to be heated such as cooling water flowing through the flow pipe 6.

In this closed state, the portion of the tilt valve 4 protruding downstream from the shaft portion 42 of the valve plate 41 is a receiving portion installed inside the front wall 32 that inclines downward toward the upstream side of the separator 3. By abutting on 33, the tilting operation of the valve plate 41 is regulated, and the flow of exhaust gas between the separator 3 and the valve plate 41 is regulated. Reference numeral 28 in the drawing is a receiving portion for receiving the valve plate 41 in the open state provided in the substrate 2.

According to the waste heat recovery device 1 of the present embodiment, the heat exchange path is provided by a substrate 2 formed by joining a pair of halves 24a and 24b and a separator 3 that substantially separates the inside of the bulging portion 23 of the substrate 2. Since the ER and the detour DR can be configured, the exhaust heat recovery device 1 can be formed with a small number of parts. Therefore, the number of joining points of the parts is reduced, the manufacturing efficiency can be improved, and the cost of the parts and the cost of the joining work can be reduced to reduce the manufacturing cost. Further, since the number of parts is small, the weight of the exhaust heat recovery device 1 can be reduced. For example, when the exhaust heat recovery device 1 recovers the exhaust heat from the exhaust of the internal combustion engine of an automobile, the exhaust heat recovery device 1 is used. Fuel efficiency can be improved by reducing the weight of 1. Further, in the configuration in which the exhaust gas flows through the substrate 2, the exhaust heat recovery device 1 can be easily connected to the exhaust pipe by connecting the exhaust pipe on the upstream side to the fluid introduction unit 21 and the exhaust pipe on the downstream side to the fluid lead-out unit 22. It can be attached, and the installation work of the exhaust heat recovery device 1 can be facilitated.

Further, the separator 3, the tilt valve 4, and the flow pipe 6 are erected between the half bodies 24a and 24b, so that the pair of half bodies 24a and 24b are linked to each other to be linked to the separator 3, the tilt valve 4, and the tilt valve 4. The distribution pipe 6 can be easily installed on the substrate 2. Further, both ends of the flow pipe 6 are fitted and welded to the through hole 27 of one half body 24a and the through hole 27 of the other half body 24b, respectively, so that the pair of half bodies 24a, 24b and the base 2 can be formed. On the other hand, the distribution pipe 6 can be easily and surely positioned, and the distribution pipe 6 can be fixed in an erected state. Further, bearings 26 are provided on the wall portion 25 of one half body 24a and the wall portion 25 of the other half body 24b, respectively, and the shaft portions 42 of the tilt valve 4 are tiltably supported by the bearings 26 and 26 on both sides. , The tilt valve 4 can be easily and surely positioned at the position of the bearing 26 with respect to the pair of half bodies 24a and 24b, and the base 2, and the tilt valve 4 can be attached in a tiltable state.

Further, one half body is configured to fit the fitting portion 241a provided in the mating portion of one half body 24a to the fitted portion 241b provided in the mating portion of the other half body 24b. The 24a and the other half body 24b can be positioned and aligned at an accurate position, facilitating the manufacturing work and improving the yield. Further, it is possible to facilitate the work of erection of the separator 3, the tilt valve 4, and the flow pipe 6 at an accurate position between the half bodies 24a and 24b.

Further, the flow pipe 6 is used as a flat pipe to increase the surface area, the flat plane of the flat pipe is extended in the flow direction of the fluid to increase the contact area with the fluid, and the flat pipes are laminated at intervals. The heat exchange efficiency of the flow pipe 6 can be increased by increasing the heat exchange area. Further, due to the shape and arrangement of the flat tube, the pressure loss of the fluid flowing through the substrate 2 can be reduced, and a smooth fluid flow can be ensured. For example, when the exhaust gas of an internal combustion engine of an automobile flows through the substrate 2, the back pressure of the internal combustion engine can be reduced by reducing the pressure loss, and the exhaust efficiency, intake efficiency, and combustion efficiency of the internal combustion engine can be improved.

[Scope of inclusion of the invention disclosed herein]
The inventions disclosed in the present specification are specified by changing these partial contents to other contents disclosed in the present specification to the extent applicable, in addition to the inventions and embodiments listed as inventions. Alternatively, those specified by adding other contents disclosed in the present specification to these contents, or those specified by deleting these partial contents to the extent that a partial effect can be obtained and making them into a higher concept. Include. The invention disclosed in the present specification also includes the following modifications and additional contents.

The pair of halves in the exhaust heat recovery device of the present invention is not limited to the halves 24a and 24b of the above embodiment, for example, a substantially tubular shape having a connection hole formed in an axial intermediate portion and a tilt valve attached. The other half body, which has a shape corresponding to the bulging portion of the bulging portion 23 and to which the flow pipe and the separator are attached, is arranged and joined so as to be placed on the connection hole. Is also possible.

Further, the control mechanism for switching the tilt valve in the present invention is not limited to the thermoactuator 5 of the above embodiment, and is appropriate. For example, the connecting portion of the control mechanism is connected to the shaft portion 42 of the tilt valve 4 for operation. It is also possible to use a control mechanism or the like that rotates the shaft portion 42 of the tilt valve 4 according to the ON / OFF operation of the operator by a switch such as a seat. Further, the shape of the separator 3 is appropriate as long as the inside of the bulging portion 23 can be substantially divided into a heat exchange path ER and a detour DR.

Further, in the exhaust heat recovery device 1 of the above embodiment, the exhaust heat flows through the base 2 and the heated fluid flows through the flow pipe. However, in the exhaust heat recovery device 1 of the present invention, the base 2 is the heated fluid. It is also possible to configure the distribution pipe 6 to circulate the exhaust as well as to distribute the fluid, thereby reducing the number of parts, improving the manufacturing efficiency, reducing the manufacturing cost, and reducing the weight of the exhaust heat recovery device. Can be done. Further, the heating fluid in the present invention includes other than exhaust such as liquid and steam, and the exhaust heat recovery device of the present invention includes other than those installed in an automobile.

The present invention can be used, for example, when recovering exhaust heat from the exhaust gas of an internal combustion engine of an automobile.

1 ... Exhaust heat recovery device 2 ... Base 21 ... Fluid introduction part 22 ... Fluid lead-out part 23 ... Swelling part 24a, 24b ... Half body 241a ... Fitting part 241b ... Fitted part 25 ... Wall part 251 ... Mounting part 26 ... Bearing 27 ... Through hole 28 ... Receiving part 3 ... Separator 31 ... Side wall 32 ... Front wall 33 ... Receiving part 4 ... Tilt valve 41 ... Valve plate 42 ... Shaft part 5 ... Thermoactuator 6 ... Flow pipe 61 ... Fin 7 ... Distribution connection unit 71 ... Connection cover 72 ... Piping ER ... Heat exchange path DR ... Detour

Claims (6)

A substantially tubular fluid introduction section, a substantially tubular fluid lead-out section, provided between the fluid introduction section and the fluid lead-out section, and projecting laterally in one direction with respect to the fluid introduction section and the fluid lead-out section. A substrate having a bulging portion to be formed by joining a pair of halves having a shape in which the fluid introduction portion, the fluid out-drawing portion, and the bulging portion are divided into two in the protruding direction of the bulging portion. When,
A separator extending in the flow direction of the fluid flowing through the substrate and substantially dividing the inside of the bulging portion into a heat exchange path and a detour.
A tilt valve that can be switched to regulate the flow of fluid flowing through the substrate to either the heat exchange path or the detour.
The fluid flowing through the heat exchange path is provided so as to flow around, and a plurality of flow tubes arranged side by side at intervals are provided.
The separator, the tilt valve, and the flow pipe are erected between the half bodies.
Exhaust heat recovery is characterized in that the heated fluid flows through the substrate and the fluid to be heated flows in the erection direction of the flow pipe so that the fluid to be heated is introduced from one half body side and led out from the other half body side. apparatus. A substantially tubular fluid introduction section, a substantially tubular fluid lead-out section, provided between the fluid introduction section and the fluid lead-out section, and projecting laterally in one direction with respect to the fluid introduction section and the fluid lead-out section. A substrate having a bulging portion to be formed by joining a pair of halves having a shape in which the fluid introduction portion, the fluid out-drawing portion, and the bulging portion are divided into two in the protruding direction of the bulging portion. When,
A separator extending in the flow direction of the fluid flowing through the substrate and substantially dividing the inside of the bulging portion into a heat exchange path and a detour.
A tilt valve that can be switched to regulate the flow of fluid flowing through the substrate to either the heat exchange path or the detour.
The fluid flowing through the heat exchange path is provided so as to flow around, and a plurality of flow tubes arranged side by side at intervals are provided.
The separator, the tilt valve, and the flow pipe are erected between the half bodies.
Exhaust heat recovery is characterized in that the fluid to be heated flows through the substrate and the heated fluid flows in the erection direction of the flow pipe so that the heated fluid is introduced from one half body side and led out from the other half body side. apparatus. The waste heat recovery according to claim 1 or 2 , wherein both ends of the flow pipe are fitted and welded to the through hole of one half body and the through hole of the other half body, respectively. apparatus. The claim is characterized in that bearings are provided on one wall portion of the half body and the wall portion of the other half body, respectively, and the shaft portion of the tilt valve is tiltably supported by the bearings on both sides. The exhaust heat recovery device according to any one of 1 to 3. Claims 1 to 1 , wherein the fitting portion provided in the mating portion of one of the half bodies is fitted to the mated portion provided in the mating portion of the other half body. The exhaust heat recovery device according to any one of 4. It said flow tube is a flat tube, wherein the flat surface of the flat tube while being extended in the flow direction of the fluid flowing through the substrate, the flat tube, characterized in that it is laminated at intervals Item 4. The exhaust heat recovery device according to any one of Items 1 to 5.

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