JP5498988B2 - Heat recovery device assembly and exhaust heat recovery device - Google Patents

Description

  The present invention relates to a waste heat recovery technique for recovering heat of exhaust gas with a medium.

  Various techniques for recovering heat of exhaust gas generated in an internal combustion engine with a medium flowing in a heat recovery device have been proposed (see, for example, Patent Document 1 (FIG. 2)).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 11, the heat recovery device assembly 100 includes a heat recovery device main body 110, an introduction portion 101 that is attached to the lower surface of the heat recovery device main body 110 and introduces a medium, and an upper surface of the heat recovery device main body 110. And a discharge unit 102 for discharging the medium.

  The heat recovery device main body 110 constituting the main part of the heat recovery device assembly 100 includes a core case 111 and an end plate 112 (shown only on the upstream side) that is attached to both ends of the core case 111 and closes the ends of the core case 111. ) And a plurality of heat transfer tubes 113 supported by these end plates 112 and extending in the exhaust gas flow direction.

The medium indicated by the white arrow (11) flows along the outer periphery of the heat transfer tube 113 in the core case 111. On the other hand, the exhaust gas indicated by the white arrow (12) flows through the inner peripheral portion of the heat transfer tube 113. The heat of the exhaust gas flowing through the inner peripheral portion of the heat transfer tube 113 is recovered by the medium flowing through the outer peripheral portion of the heat transfer tube 113.
The medium is preferably cooling water.

  By the way, the temperature of the exhaust gas before heat is recovered is very high. When the medium is water, the temperature of the exhaust gas is very high, and therefore the medium (water) heated by the exhaust gas may boil near the upstream end plate 112. When the medium boils, the bubbles hinder the smooth flow of the medium. Since the medium does not flow smoothly, the efficiency with which the heat recovery unit recovers heat decreases, which is not preferable.

  It is desired to provide a heat recovery technique that allows a medium to flow smoothly.

JP 2008-231929 A

  An object of the present invention is to provide a heat recovery technique that allows a heat medium to flow smoothly.

The heat recovery device main body according to claim 1 includes a core case, a plurality of heat transfer tubes that are housed in the core case and in which the first heat medium flows, and second heat that flows outside the heat transfer tubes. A second heat medium introduction port provided in the core case for guiding the medium into the core case, and a second heat for discharging the second heat medium introduced through the second heat medium introduction port and flowing in the core case to the outside It has a heat recovery unit body consisting of a medium outlet,
A second heat medium introduction tube for introducing a second heat medium into the heat recovery device main body and a second heat medium discharge tube for discharging the second heat medium from the heat recovery device main body are connected to the core case via a connecting member. A heat recovery unit assembly connected to
The second heat medium inlet is provided at the upstream end of the core case with reference to the flow direction of the first heat medium,
Second heat medium outlet, Ri Do from the upstream side discharge port provided at the upstream end of the core case, and the downstream side discharge port provided at the downstream end of the core case,
The second heat medium discharge pipe includes a downstream discharge pipe that connects the downstream discharge port to the connection member, and an upstream discharge pipe that extends outward from the connection member,
The connection member includes an introduction pipe connection port to which one end of the second heat medium introduction pipe is connected, a second heat medium introduction path connecting the introduction pipe connection port to the second heat medium introduction port, A downstream discharge pipe connection port to which one end of the downstream discharge pipe is connected, and a trifurcated second heat medium discharge path connecting the downstream discharge pipe connection port and the upstream discharge port to the upstream discharge pipe and wherein the Rukoto such from the.

In the heat recovery device assembly according to claim 2 , the core case has a substantially rectangular parallelepiped shape,
Arbitrary corner on the upstream side of the upper or lower surface of the core case is the first corner, and the other corner on the same surface as the first corner and upstream is the second corner. When the corner on the downstream side of the second corner portion is the third corner portion,
A second heat medium inlet is formed in the first corner;
An upstream outlet is formed in the second corner,
A downstream outlet is formed in the third corner,
The connecting member is attached from the first corner portion to the second corner portion.

The exhaust heat recovery apparatus according to claim 3 is an exhaust heat recovery apparatus equipped with a heat recovery device assembly,
The exhaust heat recovery apparatus includes an introduction port for introducing exhaust gas, a branch unit that is connected to the downstream side of the introduction port and branches the first heat medium into two downstream channels, A first flow path connected downstream and extending downstream of the inlet, a second flow path extending downstream from the branching portion so as to bypass the first flow path, and the second flow path are provided. A heat recovery device assembly, a merging portion extending from the downstream end of the second channel toward the first channel, a chamber to which the merging portion and the downstream end of the first channel are connected, and A valve shaft supported in the room, a valve that is supported by the valve shaft and rotated to switch between two flow paths, and a thermoactuator connected to the valve shaft to rotate the valve,
The connecting member includes a thermoactuator mounting portion to which a base portion of the thermoactuator is mounted.

In the first aspect of the invention, the second heat medium inlet and the upstream outlet are provided at the upstream end of the core case, and the downstream outlet is provided at the downstream end of the core case.
Part of the second heat medium introduced from the second heat medium introduction port flows toward the upstream discharge port. Since both the second heat medium inlet and the upstream outlet are provided at the upstream end of the core case, the flow path of the second heat medium is short. Since the flow path of the second heat medium is short, the second heat medium can be prevented from staying on the upstream side where boiling easily occurs, and the second heat medium can be discharged out of the core case before boiling occurs.
On the other hand, the remaining part of the second heat medium introduced from the second heat medium introduction port flows toward the downstream discharge port. Since the second heat medium introduced from the upstream end portion of the core case is discharged from the downstream end portion of the core case, the heat of the exhaust gas can be sufficiently recovered.

  That is, the second heat medium is discharged outside the core case before boiling. By preventing the second heat medium from boiling, the second heat medium can flow smoothly. By smoothly flowing the second heat medium, the heat of the first heat medium can be efficiently recovered.

In addition, in the invention according to claim 1 , the connection member is attached to the heat recovery unit main body. A second heat medium introduction pipe, an upstream discharge pipe, and a downstream discharge pipe are connected to the connection member. For example, after connecting the second heat medium introduction pipe, the upstream discharge pipe, and the downstream discharge pipe to the connection member, the connection member can be connected to the heat recovery unit main body. The number of parts can be reduced as compared with the case where each part is individually connected.

In the invention which concerns on Claim 2 , the connection member is attached ranging from the 1st corner part located in the upper surface or lower surface of a core case to a 2nd corner part. A connection member is attached to a portion above or below the core case, and the second heat medium introduction pipe, the upstream discharge pipe, and the downstream discharge pipe are connected to the connection member. That is, the second heat medium introduction pipe, the upstream side discharge pipe, and the downstream side discharge pipe can be arranged together near the upper surface or the lower surface of the core case. By arranging them together, it is possible to reduce the size of the heat recovery device assembly.

In the invention which concerns on Claim 3 , the connection member is equipped with the thermo actuator attachment part to which the base part of a thermo actuator is attached. The thermoactuator can be easily attached and the number of parts can be reduced.

It is a perspective view of the waste heat recovery device concerning the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 is a plan view of a heat recovery device assembly according to Embodiment 1. FIG. It is a top view of the heat recovery device concerning the present invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is sectional drawing of the connection member which concerns on this invention. FIG. 7 is a sectional view taken along line 7-7 in FIG. 3. It is a figure explaining the effect | action of the heat recovery device assembly which concerns on this invention. It is a top view of the heat recovery device assembly which concerns on Example 2. FIG. 6 is a plan view of a heat recovery device assembly according to Embodiment 3. FIG. It is a figure explaining the basic composition of the conventional technology.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

First, Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the exhaust heat recovery apparatus 10 includes an inlet 11 for introducing exhaust gas, and an exhaust gas (first heat medium) connected to and introduced downstream of the inlet 11 on the downstream side. A branch section 12 that branches into two flow paths, a first flow path 13 that is connected downstream of the branch section 12 and extends downstream of the introduction port 11, and the branch section 12 so as to bypass the first flow path 13. From the downstream end of the second flow path 14 toward the first flow path 13, the second flow path 14 extending from the second flow path 14 toward the downstream, the heat recovery device assembly 30 provided in the second flow path 14. Junction 16, chamber 17 to which the junction 16 and the downstream end of the first flow path 13 are connected, a valve shaft 18 supported by the chamber 17, and a rotation supported by the valve shaft 18. By attaching to the side of the chamber 21 and the valve 21 for switching the two flow paths Re and biasing means 22 for biasing a direction closing the valve shaft 18, made of thermo-actuators 23 operate at a temperature of the cooling water tip is connected to the biasing means 22 (second heat medium).

The introduction port 11 is formed integrally with the branch portion 12.
The base of the thermoactuator 23 is supported by the heat recovery device assembly 30.
Details of the valve 21 will be described with reference to the following figure.

  As shown in FIG. 2, the valve 21 includes a fixed portion 26 that is fixed to the valve shaft 18 via a bolt 25, and a valve that is provided at the tip of the fixed portion 26 and closes the downstream end portion 13 b of the first flow path 13. It consists of a body 28.

  The valve body 28 is seated on a seating portion 29 attached to the inner peripheral surface of the downstream end portion 13 b of the first flow path 13. In the state shown in the figure, the valve 21 closes the first flow path 13. Since the first flow path 13 is closed, the exhaust gas introduced from the introduction port 11 flows in the branch portion 12 toward the second flow path 14 (the back side of the drawing).

  On the other hand, the valve 21 opens the first flow path 13 by rotating the valve shaft 18. When the first flow path 13 is open, the exhaust gas introduced from the introduction port 11 flows through the first flow path 13. Returning to FIG. 1, the details will be described.

  When the first flow path 13 is closed, the exhaust gas introduced from the introduction port 11 goes to the second flow path 14 through the branch portion 12. A heat recovery device assembly 30 is provided in the second flow path 14, and the exhaust gas exchanges heat with the cooling water in the heat recovery device assembly 30. The exhaust gas that has undergone heat exchange flows to the room portion 17 via the junction 16 and is discharged to the outside.

When the cooling water flowing through the heat recovery unit assembly 30 exceeds a predetermined temperature, the wax in the thermoactuator 23 expands. As the wax expands, the distal end portion 23a of the thermoactuator 23 advances toward the right in the drawing. The tip 23 a of the thermoactuator 23 moves forward against the force urged by the urging means 22 and rotates the valve shaft 18. The valve 21 is opened by rotating the valve shaft 18, and the exhaust gas flows through the first flow path 13.
Details of the heat recovery unit assembly 30 will be described with reference to FIG.

As shown in FIG. 3, the heat recovery unit assembly 30 includes a heat recovery unit main body 40 that forms a second flow path (FIG. 1, reference numeral 14) and performs heat exchange with the exhaust gas, and the heat recovery unit. A connection member 60 attached to the upper surface of the main body 40, a second heat medium introduction pipe 31 that is connected to the connection member 60 and introduces cooling water (second heat medium) into the heat recovery body 40, and is connected to the connection member 60. And a second heat medium discharge pipe 32 for discharging the cooling water of the heat recovery unit main body 40.
Details of the heat recovery unit main body 40 will be described with reference to the next figure.

  As shown in FIG. 4, the heat recovery unit main body 40 has a substantially rectangular parallelepiped core case 41, an upstream end plate 42 attached to the upstream end 41 a of the core case 41, and the upstream end plate 42. The downstream end plate 43 is attached to the downstream end portion 41 b of the core case 41.

  Of the upper surface of the core case 41, the left corner on the upstream side is the first corner portion C1, and the other corner on the same upstream side as the first corner portion C1 is the second corner portion C2. A corner on the downstream side of the second corner portion C2 is defined as a third corner portion C3. In this case, the second heat medium introduction port 45 for introducing the cooling water is formed in the first corner portion C1, and is an exhaust port for discharging the cooling water and formed on the upstream side. An outlet 46 is formed in the second corner portion C2, and a downstream discharge port 47 that is a discharge port for discharging the cooling water and formed on the downstream side is formed in the third corner portion C3.

The second heat medium outlet 48 for discharging the cooling water includes two outlets, an upstream outlet 46 and a downstream outlet 47.
That is, the cooling water introduced into the core case 41 from the second heat medium introduction port 45 is discharged to the outside of the core case 41 from either the upstream side discharge port 46 or the downstream side discharge port 47.

  A part of the upper surface of the core case 41 is a flow path restricting recess 41c that is recessed to restrict the flow of the cooling water. Although details will be described later, the flow path of the cooling water can be regulated by forming the flow path regulating recess 41c. Since the flow path of the cooling water is regulated by the shape of the core case 41, the number of parts of the heat recovery unit main body 40 can be reduced.

  The second heat medium introduction port 45 and the upstream side discharge port 46 are formed by partitioning one hole 41 d opened in the upper surface of the core case 41. What is indicated by an imaginary line is a partition part 63b for partitioning the second heat medium inlet 45 and the upstream outlet 46. That is, the second heat medium introduction port 45 is a portion of the hole 41d closer to the first corner portion C1 (lower side in the drawing) than the partition portion 63b, and the upstream discharge port 46 is a partition of the hole 41d. This is a portion on the second corner portion C2 side (the upper side in the drawing) from the portion 63b. The hole 41d has a substantially rectangular shape.

In order to maintain the strength of the hole 41d, a plurality of reinforcing portions 49 are formed. A connecting member (FIG. 3, reference numeral 60) is attached to the upper portion of the hole 41d.
Details of the heat recovery unit main body 40 will be further described with reference to the next drawing.

  As shown in FIG. 5, a plurality of heat transfer tubes 51 are accommodated in the core case 41, and fins 52 are respectively disposed in these heat transfer tubes 51. Both ends of the heat transfer tube 51 are supported by end plates (FIG. 4, reference numerals 42 and 43).

  The exhaust gas flows into the heat transfer tube 51, and the cooling water flowing outside the heat transfer tube 51 is warmed. As the cooling water is warmed, the temperature of the exhaust gas flowing through the heat transfer tube 51 is lowered.

  The connection member 60 attached to the upper part of the core case 41 includes a second heat medium introduction path 61 for introducing cooling water into the core case 41 and a second heat medium for discharging the cooling water in the core case 41. The second heat medium introduction path 61 and the second heat medium discharge path 62 are partitioned by a wall portion 63. The wall 63 extends from the second heat medium introduction path 61 toward the second heat medium discharge path 62, and the wall 63 extends from the tip of the bulge 63a toward the heat transfer tube 51. It consists of a partition part 63 b that partitions the heat medium inlet 45 and the upstream outlet 46.

  By forming the bulging portion 63a, the connecting member 60 can be made compact while widening the second heat medium introduction path 61 and the second heat medium introduction port 45. By making the connecting member 60 compact, it can be disposed above the heat recovery unit main body 40. That is, the connection member 60 can be arranged so that the connection member 60 substantially overlaps the width of the heat recovery unit main body 40.

In addition, by extending the wall portion 63 to a position where it substantially contacts the heat transfer tube 51, a partition portion 63b that partitions the second heat medium inlet 45 and the upstream outlet 46 is formed. Since the wall part 63 is extended and formed, the number of parts can be reduced.
In addition, the cooling water introduced from the second heat medium introduction port 45 can be made to flow to the lower end of the heat transfer tube 51 by causing the partition part 63 b to substantially contact the heat transfer tube 51. That is, the partition part 63b also serves as a restricting part that restricts the flow path of the cooling water.

The shape of the edge portion 64 of the connection member 60 is formed in accordance with the shape of the edge portion 41 e of the core case 41, and the edge portion 64 of the connection member 60 can be fitted to the edge portion 41 e of the core case 41. . By fitting, the connecting member 60 can be easily positioned with respect to the heat recovery unit main body 40. Moreover, when welding the connection member 60 with respect to the heat recovery device main body 40, the connection member 60 is fixed and a welding operation can be performed easily.
Details of the heat recovery unit assembly (FIG. 3, reference numeral 30) will be described with reference to the next drawing.

  As shown in FIG. 6, the second heat medium discharge pipe 32 of the heat recovery device assembly 30 includes a downstream discharge pipe 33 that connects the downstream discharge port 47 to the connection member 60, and the connection member 60 toward the outside. And an upstream discharge pipe 34 extending therefrom.

  The connection member 60 includes an introduction pipe connection port 66 to which one end of the second heat medium introduction pipe 31 is connected, and a second heat medium introduction path 61 that connects the introduction pipe connection port 66 to the second heat medium introduction port 45. A thermoactuator mounting portion 67 formed downstream of the second heat medium introduction path 61 to which a thermoactuator base (FIG. 1, reference numeral 23b) is mounted, and a downstream side to which one end of the downstream discharge pipe 33 is connected. A discharge pipe connection port 68, and a downstream heat pipe discharge path 62 (see also FIG. 5) connecting the downstream discharge pipe connection port 68 and the upstream discharge port 46 to the upstream discharge pipe 34. And an upstream discharge pipe connection port 69 to which the upstream discharge pipe 34 is connected.

  Referring also to FIG. 1, the heat of the cooling water can be transmitted to the thermoactuator 23 by attaching the thermoactuator 23 to the thermoactuator mounting portion 67. When the heat of the cooling water is transmitted to the thermoactuator 23, the wax in the thermoactuator 23 expands or contracts. As the wax expands or contracts, the tip 23a of the thermoactuator 23 moves forward or backward. That is, the thermoactuator 23 operates according to the temperature of the cooling water.

  The connection member 60 includes a thermoactuator mounting portion 67 to which the base 23b of the thermoactuator 23 is mounted. The thermoactuator 23 can be easily attached and the number of parts can be reduced.

  Returning to FIG. 6, the second heat medium introduction pipe 31, the upstream discharge pipe 34, and the downstream discharge pipe 33 are connected to the connection member 60. For example, the second heat medium introduction pipe 31, the upstream discharge pipe 34 and the downstream discharge pipe 33 can be connected to the connection member 60 and then connected to the heat recovery body 40. The number of parts can be reduced as compared with the case where each part is individually connected.

  In addition, the connection member 60 is attached from the first corner portion C1 located on the upper surface of the core case 41 to the second corner portion C2. A connection member 60 is attached to a portion above the core case 41, and the second heat medium introduction pipe 31, the upstream discharge pipe 34 and the downstream discharge pipe 33 are connected to the connection member 60. That is, the second heat medium introduction pipe 31, the upstream side discharge pipe 34, and the downstream side discharge pipe 33 can be arranged together near the upper surface of the core case 41. By arranging them together, the heat recovery assembly 30 can be reduced in size.

The flow path regulating recess 41c is recessed to a position in the vicinity of the heat transfer tube (FIG. 5, reference numeral 51). The channel of the cooling water is regulated by denting the channel regulating recess 41c to a position near the heat transfer tube.
Details of the vicinity of the downstream discharge port 47 will be described with reference to the next drawing.

As shown in FIG. 7, the downstream discharge pipe 33 is connected to the downstream discharge port 47. A part of the cooling water introduced from the second heat medium inlet (FIG. 4, reference numeral 45) is discharged from the upstream outlet (FIG. 4, reference numeral 46), and the remaining part is discharged from the downstream outlet 47. .
Details of the flow of the cooling water will be described with reference to the next figure.

  As schematically shown in FIG. 8, the cooling water passes through the second heat medium introduction pipe 31 and the connection member 60 (see arrow (1)). A part of the cooling water that has passed through the connecting member 60 flows downward on the upstream side of the core case 41 as indicated by an arrow (2). The remaining portion of the cooling water flows downstream along the heat transfer tube 51 as indicated by the arrow (3).

  The cooling water flowing on the upstream side of the core case 41 flows upward through the lower end of the heat transfer tube 51 as indicated by an arrow (4), and flows into the connecting member 60 as indicated by an arrow (5). It is discharged towards.

On the other hand, the cooling water flowing toward the downstream flows between and outside the heat transfer tubes 51 as indicated by the arrow (6), and flows toward the downstream discharge pipe 33. As shown by the arrow (7), it passes through the downstream discharge pipe 33 and merges with the cooling water that has passed through the upstream side by the connecting member 60.
The merged cooling water passes through the upstream discharge pipe 34 as indicated by the arrow (8).

  A part of the cooling water (arrow (1)) introduced from the second heat medium introduction port flows toward the upstream discharge port (arrows (2), (4), (5)). Since both the second heat medium inlet and the upstream outlet are provided at the upstream end of the core case 41, the flow path of the cooling water is short. Since the flow path of the cooling water is short, the cooling water can be discharged out of the core case 41 before the boiling occurs on the upstream side where boiling easily occurs.

  On the other hand, the remaining portion of the second heat medium introduced from the second heat medium introduction port flows toward the downstream discharge port (arrows (3), (6)). Since the cooling water introduced from the upstream end portion of the core case is discharged from the downstream end portion of the core case 41, the heat of the exhaust gas can be sufficiently recovered.

That is, the cooling water is discharged to the outside of the core case 41 before boiling. By preventing the cooling water from boiling, the cooling water can flow smoothly. By smoothly flowing the cooling water, the heat of the exhaust gas can be efficiently recovered.
Another embodiment of such a heat recovery unit assembly will be described with reference to the following figure.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a plan view of the heat recovery device assembly according to the second embodiment, corresponding to FIG.
As shown in FIG. 9, a second medium introduction pipe 71 and a second medium discharge pipe 72 are connected to the heat recovery unit main body 70.
That is, the heat recovery device main body 70 according to the second embodiment is connected to the second medium introduction pipe 71 and the second medium discharge pipe 72 without the connection member (FIG. 3, reference numeral 60).

The heat recovery device main body 70 is provided with a second heat medium introduction port 74 at the upstream end 73 a of the core case 73.
The second heat medium discharge port 75 for discharging the cooling water includes an upstream discharge port 76 provided at the upstream end portion 73 a of the core case 73 and a downstream discharge port provided at the downstream end portion 73 b of the core case 73. It consists of an outlet 77.

Also when such a heat recovery device main body 70 is used, the cooling water is discharged to the outside of the core case 73 before the cooling water boils. By preventing the cooling water from boiling, the cooling water can flow smoothly. By smoothly flowing the cooling water, the heat of the exhaust gas can be efficiently recovered.
A further embodiment of such a heat recovery device assembly is described in the following figure.

Next, Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 10 is a plan view of the heat recovery device assembly according to the third embodiment, corresponding to FIG.
As shown in FIG. 10, a second medium introduction pipe 81 and a second medium discharge pipe 82 are connected to the heat recovery unit main body 80.
That is, in the heat recovery device main body 80 according to the third embodiment, the second medium introduction pipe 81 and the second medium discharge pipe 82 are connected without the connection member (FIG. 3, reference numeral 60).

The heat recovery device main body 80 is provided with a second heat medium introduction port 84 on the side surface of the upstream end portion 83 a of the core case 83.
The second heat medium discharge port 85 for discharging the cooling water is provided on the upstream discharge port 86 provided on the side surface of the upstream end portion 83 a of the core case 83 and on the side surface of the downstream end portion 83 b of the core case 83. And a downstream discharge port 87.

  The heat transfer tube is disposed along the flow direction of the cooling water (second heat medium). That is, in Example 1, the heat transfer tubes (see FIG. 5) arranged in the vertical direction are arranged in the horizontal direction in Example 3.

  Even when such a heat recovery device main body 80 is used, the cooling water is discharged to the outside of the core case 83 before the cooling water boils. By preventing the cooling water from boiling, the cooling water can flow smoothly. By smoothly flowing the cooling water, the heat of the exhaust gas can be efficiently recovered.

  In addition, the heat recovery device main body and the heat recovery device assembly according to the present invention can be applied to an EGR (Exhaust Gas Recirculation) cooler, and the use is not limited to these.

  The exhaust heat recovery apparatus of the present invention is suitable for a four-wheeled vehicle.

  DESCRIPTION OF SYMBOLS 10 ... Waste heat recovery apparatus, 11 ... Inlet port, 12 ... Branch part, 13 ... 1st flow path, 13b ... Downstream end part (of 1st flow path) 14 ... 2nd flow path, 16 ... Merge part, 17 ... Room part 18 ... Valve shaft 21 ... Valve 23 ... Thermoactuator 23b ... Base of (thermoactuator) 30 ... Heat recovery device assembly 31 ... Second heat medium introduction pipe 32 ... Second heat medium discharge Pipe, 33 ... downstream discharge pipe, 34 ... upstream discharge pipe, 40, 70, 80 ... heat recovery device body, 41, 73, 83 ... core case, 41a, 73a, 83a ... upstream end of core case , 41b, 73b, 83b ... downstream end of the core case, 45, 74, 84 ... second heat medium inlet, 46, 76, 86 ... upstream outlet, 47, 77, 87 ... downstream outlet 48, 75, 85 ... 2nd heat carrier discharge port, 51 ... Heat transfer tube, 6 ... Connection member, 61 ... Second heat medium introduction path, 62 ... Second heat medium discharge path, 66 ... Introduction pipe connection port, 68 ... Downstream discharge pipe connection port, C1 ... First corner portion, C2 ... Second Corner part, C3 ... third corner part.

Claims (3)

A core case, a plurality of heat transfer tubes housed in the core case and through which the first heat medium flows; and a second heat medium flowing outside the heat transfer tubes to guide the core case into the core case. Heat recovery comprising a second heat medium inlet provided in the core case, and a second heat medium outlet for discharging the second heat medium introduced through the second heat medium inlet and flowing through the core case to the outside It has a vessel body,
A second heat medium introduction tube for introducing a second heat medium into the heat recovery device main body and a second heat medium discharge tube for discharging the second heat medium from the heat recovery device main body are connected to the core case via a connecting member. A heat recovery unit assembly connected to
The second heat medium introduction port is provided at the upstream end of the core case with reference to the flow direction of the first heat medium,
The second heat medium outlet, Ri Do from the upstream side discharge port provided at the upstream end of the core case, and the downstream side discharge port provided at the downstream end of the core casing,
The second heat medium discharge pipe includes a downstream discharge pipe that connects the downstream discharge port to the connection member, and an upstream discharge pipe that extends outward from the connection member,
The connection member includes an introduction pipe connection port to which one end of the second heat medium introduction pipe is connected, a second heat medium introduction path connecting the introduction pipe connection port to the second heat medium introduction port, A downstream discharge pipe connection port to which one end of the downstream discharge pipe is connected, and a trifurcated second heat medium discharge path connecting the downstream discharge pipe connection port and the upstream discharge port to the upstream discharge pipe A heat recovery device assembly characterized by comprising: The core case has a substantially rectangular parallelepiped shape,
Of the upper surface or the lower surface of the core case, an arbitrary corner on the upstream side is a first corner portion, and the other corner on the same surface as the first corner portion and on the upstream side is a second corner portion. When the corner on the downstream side of the second corner portion is the third corner portion,
The second heat medium introduction port is formed in the first corner portion;
The upstream discharge port is formed in the second corner portion,
The downstream discharge port is formed in the third corner portion,
It said connecting member, the heat recovery assembly according to claim 1, wherein the mounted across from the first corner to said second corner. An exhaust heat recovery device in which the heat recovery device assembly according to claim 1 or 2 is mounted,
The exhaust heat recovery apparatus includes an introduction port for introducing exhaust gas, a branch portion connected downstream of the introduction port and branching the introduced exhaust gas into two downstream channels, and downstream of the branch portion. A first flow path that is connected and extends downstream of the introduction port, a second flow path that extends downstream from the branch portion so as to bypass the first flow path, and a second flow path are provided. The heat recovery device assembly, a merging portion extending from the downstream end of the second flow path toward the first flow path, and a chamber to which the merging portion and the downstream end of the first flow path are connected. A valve shaft supported by the chamber portion, a valve that is supported by the valve shaft and rotates to switch the two flow paths, and is connected to the valve shaft to rotate the valve. It consists of a thermo actuator,
The exhaust heat recovery apparatus according to claim 1, wherein the connection member includes a thermoactuator mounting portion to which a base portion of a thermoactuator is mounted.

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