JP2015194271A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of ensuring prompt heat exchange even if a heat storage member is not warmed up sufficiently.SOLUTION: A heat exchanger 30 configured to implement heat exchange between exhaust gas G flowing in a first channel (heat exchange unit 20) and discharged from an engine ENG and cooling water W flowing in a second channel (heat exchange unit 40) via a heat storage member 31, and is configured so that a first heat transfer member 32 connected to the heat exchange unit 20 and a second heat transfer unit 34 connected to the heat exchange unit 40 are disposed to be spaced apart in the heat storage member 31, fins 38 provided in the first heat transfer member 32 are disposed in contact with the second heat transfer member 34, and the heat exchanger 30 comprises a cylinder device 36 which moves the first heat transfer member 32 and the second transfer member 34 in a direction of separating from each other to make the fins 38 out of contact with the second heat transfer member 34 if a temperature of the heat storage member 31 is equal to or higher than a predetermined temperature (100°C or higher).

Description

  The present invention relates to a heat exchange device.

  Patent Document 1 discloses that the temperature of conditioned air that is adjusted by an air conditioner immediately after the engine is started by storing the heat of warm water heated by the heat of exhaust gas discharged from the engine in a heat storage member of the heat storage device. It is disclosed that when the temperature is low, the conditioned air is warmed using heat stored in the heat storage member.

Japanese Utility Model Publication 2-76510

  In the heat exchanger of the exhaust heat recovery system, the first heat transfer member for exchanging heat between the hot water heated by the heat of the exhaust gas discharged from the engine and the heat storage member, A second heat transfer member for exchanging heat with the conditioned air flowing through the air conditioner is provided in the heat storage member with an interval between the first heat transfer member and the second heat transfer member. Heat exchange with the heat transfer member is performed via the heat storage member.

  Here, in the case of the heat exchanger of Patent Document 1, if the heat storage member is not sufficiently warmed, heat exchange between the first heat transfer member and the second heat transfer member cannot be performed appropriately. Therefore, when the heat storage member is not sufficiently warmed immediately after starting the engine, rapid heat exchange cannot be performed between the first heat transfer member and the second heat transfer member. It was.

  Therefore, even when the heat storage member is not sufficiently warmed, it is required to perform heat exchange quickly.

  The present invention performs heat exchange between the first heat exchange medium flowing through the first flow path and the second heat exchange medium flowing through the second flow path via the heat storage member. A heat exchange device configured as described above, wherein a first heat transfer member connected to the first flow path and a second heat transfer member connected to the second flow path are connected to the heat storage member. When the third heat transfer member provided on the first heat transfer member is placed in contact with the second heat transfer member and the temperature of the heat storage member is equal to or higher than a predetermined temperature, the inner heat transfer member is arranged with a space therebetween. Heat provided with driving means for moving the first heat transfer member and the second heat transfer member away from each other and bringing the third heat transfer member and the second heat transfer member into non-contact with each other An exchange device was used.

  According to the present invention, heat exchange can be performed quickly even when the heat storage member is not sufficiently warmed.

It is a lineblock diagram of the exhaust heat recovery system concerning an embodiment. It is the schematic explaining operation | movement of the cylinder apparatus concerning embodiment. It is a figure explaining the heat exchange apparatus concerning an embodiment. It is a section perspective view near the fin concerning an embodiment. It is a figure explaining operation | movement of the heat exchange apparatus concerning other embodiment.

Hereinafter, a case where the heat exchange device of the present invention is applied to an exhaust heat recovery system that performs heat exchange between exhaust gas of an engine and cooling water will be described as an example.
FIG. 1 is a schematic diagram illustrating the overall configuration of an exhaust heat recovery system 1 according to the first embodiment.
2 is a diagram illustrating the structure of the cylinder device 36, and is an enlarged view of the region A in FIG. 1. FIG. 2 (a) shows a case where the phase change medium B of the cylinder device 36 is in a solid state. (B) has each shown the case where the phase change medium B of the cylinder apparatus 36 is a liquid state.
FIG. 3 is a diagram illustrating the operation of the heat exchanging device 30, and FIG. 3A is a diagram illustrating a state in which the first heat transfer member 32 and the second heat transfer member 34 are at the reference position. (B) is a figure which shows the state which has the 1st heat-transfer member 32 and the 2nd heat-transfer member 34 in an operation position.
In FIG. 1, the cylinder device 36 of the exhaust heat recovery system 1 is shown in cross section.

  As shown in FIG. 1, the exhaust heat recovery system 1 includes a heat exchange device 30 that exchanges heat between the exhaust gas G discharged from the engine ENG and the cooling water W of the engine ENG.

  In the exhaust heat recovery system 1, the exhaust pipe 10 through which the exhaust gas G flows is provided with a heat exchange section 20 having a diameter larger than that of the exhaust pipe 10, and the piping 41 through which the cooling water W flows. A heat exchanging unit 40 having a diameter larger than that of the pipe 41 is provided, and the heat exchanging device 30 is located between the heat exchanging units 20 and 40.

  The heat exchange device 30 includes a first heat transfer member 32 connected to the heat exchange unit 20 and a second heat transfer member 34 connected to the heat exchange unit 40, and these first heat transfer members 34. The heat member 32 and the second heat transfer member 34 are provided in parallel to each other with a space inside the heat storage member 31.

  The heat storage member 31 is made of a material capable of storing heat, such as paraffin, xylitol, erythritol, and the heat storage member 31 stores heat of the exhaust gas G transmitted through the first heat transfer member 32. And it can be warmed up.

The first heat transfer member 32 is a cylindrical member formed of a material having high thermal conductivity such as copper or aluminum, and the one end 32a side in the longitudinal direction penetrates the peripheral wall 20a of the heat exchange unit 20. The heat exchanger 20 is located inside.
In the heat exchange part 20, the one end 32 a side of the first heat transfer member 32 is provided across the flow path of the exhaust gas G passing through the heat exchange part 20, and the exhaust gas G passing through the heat exchange part 20. Is in contact with the first heat transfer member 32, so that the first heat transfer member 32 is warmed by the heat of the exhaust gas G.

  Here, the other end 32b side of the first heat transfer member 32 is located in the heat storage member 31, and when the first heat transfer member 32 is warmed by the heat of the exhaust gas G, the heat storage member 31 also Heated by the heat transmitted through the heated first heat transfer member 32.

  Similarly to the first heat transfer member 32, the second heat transfer member 34 is also a cylindrical member formed of a material having a high thermal conductivity such as copper or aluminum. The one end 34 a side in the longitudinal direction of the member 34 passes through the peripheral wall 42 a of the heat exchange unit 40 and is located inside the heat exchange unit 40.

  One end 34 a side of the second heat transfer member 34 is provided across the flow path of the cooling water W that passes through the heat exchange unit 40 in the heat exchange unit 40, and the cooling water that passes through the heat exchange unit 40. When W contacts the second heat transfer member 34, heat exchange is performed between the cooling water W that passes through the heat exchange unit 40 and the second heat transfer member 34.

  Here, the other end 34 b side (tip side) in the longitudinal direction of the second heat transfer member 34 is located in the heat storage member 31, and the heat storage member 31 is interposed via the first heat transfer member 32. The exhaust gas G that is transmitted is heated by the heat. Therefore, the second heat transfer member 34 having the other end 34b side (front end side) positioned in the heat storage member 31 is warmed by the heat of the exhaust gas G transmitted from the first heat transfer member 32 to the heat storage member 31. The heat of the exhaust gas G that is finally transmitted to the second heat transfer member 34 is used for heat exchange with the cooling water W that passes through the heat exchanging unit 40, so that the cooling water W is heated by the heat of the exhaust gas G transmitted.

Inside the heat storage member 31, a fin 38 fixed to the outer periphery of the first heat transfer member 32 is located between the first heat transfer member 32 and the second heat transfer member 34.
FIG. 4 is a view for explaining the fins 38 fixed to the outer periphery of the first heat transfer member 32. FIG. 4A shows the first heat transfer member 32 and the second heat transfer arranged at the reference position. It is a figure explaining arrangement | positioning of the member 34 and the fin 38, (b) is sectional drawing which cut | disconnected the fin 38 circumference | surroundings in the surface A in (a).

The fin 38 is a plate-like member formed of a material having high thermal conductivity such as copper or aluminum, and the first heat transfer member 32 and the second heat transfer member 34 arranged at the reference position are The fins 38 are connected to each other.
Therefore, heat transfer between the first heat transfer member 32 and the second heat transfer member 34 disposed at the reference position can be performed via the fins 38.

The fins 38 extend from the outer periphery of the first heat transfer member 32 on the second heat transfer member 34 side to the second heat transfer member 34 side, and are spaced apart in the longitudinal direction of the first heat transfer member 32. A plurality of them are provided.
The plurality of fins 38 provided in the first heat transfer member 32 are arranged in parallel to each other, and each of the fins 38 has a tip 38 a extending from the radial direction of the second heat transfer member 34 in the second direction. The heat transfer member 34 is contacted.
The tips 38a of the fins 38 have an arc shape along the outer periphery of the second heat transfer member 34, and a contact area between the fins 38 and the second heat transfer member 34 is ensured.
The base end (the other end 38b) of the fin 38 also has an arc shape along the outer periphery of the first heat transfer member 32, and a contact area between the fin 38 and the first heat transfer member 32 is ensured. It has become so.

  In the embodiment, the length L1 of the central portion in the width direction of the fin 38 is arranged in parallel to each other with the first heat transfer member 32 and the second heat transfer member 34 arranged at the reference position. Sometimes, the fin 38 is set to a length that can contact the second heat transfer member 34.

  As shown in FIG. 1, in the heat storage member 31, the other end 32 b side of the first heat transfer member 32 and the other end 34 b side of the second heat transfer member 34 are separated from each other (the horizontal direction in the figure). The cylinder device 36 is provided inside the heat storage member 31 to move the first heat transfer member 32 and the second heat transfer member 34 forward and backward in the direction of separating them from each other. .

  The cylinder device 36 includes a bottomed cylindrical cylinder member 36a fixed to the second heat transfer member 34, and a piston member 36b. The piston member 36b and the cylinder member 36a are connected to the piston member 36b. FIG. 3A shows a first heat transfer member 32 to which the piston member 36b is fixed and a second heat transfer member 34 to which the cylinder member 36a is fixed by relative movement in the longitudinal direction. It is displaced from the reference position in a direction away from each other, and moves to the operating position shown in FIG.

The cylinder member 36a has a bottomed cylindrical shape in which one end in the longitudinal direction of the cylindrical tube portion 36a1 is sealed by the bottom portion 36a2, and the other end in the longitudinal direction of the tube portion 36a1 A ring-shaped wall portion 36a3 that closes the opening 36a1 is integrally formed.
The cylinder member 36 a has a bottom portion 36 a 2 fixed to the second heat transfer member 34 with the wall portion 36 a 3 facing the first heat transfer member 32.

The piston member 36b includes a shaft portion 36b1 whose one end in the longitudinal direction is fixed to the first heat transfer member 32, and a valve portion 36b2 provided at the other end of the shaft portion 36b1.
The shaft portion 36b1 of the piston member 36b is provided through a through hole 36a4 provided in the wall portion 36a3 of the cylinder member 36a, and the columnar valve portion 36b2 provided at the other end of the shaft portion 36b1 is replaced with a cylinder. It arrange | positions in the cylinder part 36a1 of the member 36a.

  In the embodiment, the outer diameter D2 of the valve portion 36b2 is formed with a diameter slightly smaller than the inner diameter of the cylindrical portion 36a1, and is larger than the hole diameter D1 of the through hole 36a4 provided in the wall portion 36a3. It is formed (D2> D1). For this reason, the piston member 36b is slidably movable in the longitudinal direction of the cylinder part 36a1 (left and right direction in FIG. 1) inside the cylinder part 36a1, and the valve part 36b2 of the piston member 36b is the wall part 36a3. When it moves to the side, it does not fall off from the cylinder part 36a1.

  A sealed space 37a surrounded by the cylindrical portion 36a1, the bottom portion 36a2, and the valve portion 36b2 is formed between the valve portion 36b2 of the piston member 36b and the bottom portion 36a2 of the cylinder member 36a, and this sealed space 37a. The inside is filled with a phase change medium B whose volume changes with temperature.

  A groove 36b3 is formed on the outer periphery of the valve portion 36b2 over the entire circumference in the circumferential direction, and a resin seal ring 36c is externally fitted to the groove 36b3. The seal ring 36c provided in the valve portion 36b2 prevents the phase change medium B from leaking into the open space 37b formed on the opposite side of the sealed space 37a with the valve portion 36b2 interposed therebetween.

The phase change medium B is a material that is in a solid state when the temperature is low, such as paraffin, xylitol, and erythritol, and that melts into a liquid state when the temperature is high, and is more liquid when it is in the solid state. It is made of a material whose volume is smaller than that in the state.
In the embodiment, the phase change medium B is a material having a property of solidifying and shrinking when the temperature is lower than a predetermined temperature (for example, lower than 100 ° C.), and melting and expanding when the temperature is higher than the predetermined temperature (for example, 100 ° C. or higher). Adopted.

In the embodiment, the cylinder device 36 in a state where the phase change medium B is solidified when the first heat transfer member 32 and the second heat transfer member 34 are arranged at reference positions that are parallel to each other. Is provided so as to straddle the first heat transfer member 32 and the second heat transfer member 34.
Therefore, in this state, when the cylinder device 36 is warmed and the phase change medium B sealed in the sealed space 37a is melted, the piston member 36b and the cylinder member 36a move relatively, and the first heat transfer is performed. The member 32 and the second heat transfer member 34 are displaced in directions away from each other.

Next, the operation of the heat exchange device 30 having such a configuration will be described.
As shown in FIGS. 1 and 3A, immediately after the engine ENG is started, the heat storage member 31 and the phase change medium B of the cylinder device 36 are not warmed by the heat of the exhaust gas G. The heat transfer member 32 and the second heat transfer member 34 are arranged at reference positions parallel to each other (see FIG. 3A).

In this state, the fin 38 fixed to the first heat transfer member 32 is in contact with the second heat transfer member 34, and the heat of the exhaust gas G is transmitted to the first heat transfer member 32. Then, the heated heat of the first heat transfer member 32 is directly transmitted to the second heat transfer member 34 through the fins 38.
Therefore, since the heat of the exhaust gas G is quickly transmitted from the first heat transfer member 32 to the second heat transfer member 34, the second heat transfer member and the second heat transfer member The cooling water W that performs heat exchange between the two is warmed.

Here, the other ends 32 b and 34 b of the first heat transfer member 32 and the second heat transfer member 34 and the fins 38 are located in the heat storage member 31. In parallel with the heat transfer through the fins 38 to the second heat transfer member 34, the heat storage member 31 is warmed and the piston member 36 b fixed to the first heat transfer member 32 is used to Phase change medium B will be warmed (see arrow in FIG. 3).
When the temperature of the warmed phase change medium B becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the solid phase change medium B melts and becomes a liquid state (phase change). When the phase change medium B melts and enters a liquid state, the volume of the phase change medium B expands to V2 (see FIG. 2B), and the volume V2 of the phase change medium B in the liquid state is solid. It becomes larger than the volume V1 of the phase change medium B in the state (V2> V1).

When the phase change medium B filled in the sealed space 37a is melted and expanded, the expanded phase change medium B causes the valve portion 36b2 of the piston member 36b located inside the cylinder member 36a to move to the first heat transfer member 32. Since it is pushed to the side (left side in FIG. 2), the piston member 36b moves to the first heat transfer member 32 side.
Thereby, the direction in which the first heat transfer member 32 supported by the peripheral wall 20a of the heat exchange unit 20 is separated from the second heat transfer member 34 (the fin 38 and the second heat transfer member 34 are not in contact with each other). The first heat transfer member 32 and the second heat transfer member 34 are separated from the second heat transfer member 34 by the fins 38 fixed to the first heat transfer member 32. It will move to the operation position which will be in a state (refer FIG.3 (b)).

  In this state, the heat of the first heat transfer member 32 warmed by the exhaust gas G is not directly transferred to the second heat transfer member 34 through the fins 38, so the heat of the first heat transfer member 32 is Then, the heat is transmitted to the second heat transfer member 34 through the heat storage member 31 surrounding the first heat transfer member 32.

  In the embodiment, the heat storage member 31 is housed in a case made of a heat insulating material (not shown), and the heat storage member 31 is provided in a state of being thermally insulated from the surroundings. Therefore, the release of the heat stored in the heat storage member 31 to the outside is suppressed.

  Then, similarly to the above, the cooling water W flowing through the heat exchanging unit 40 always comes into contact with the second heat transfer member 34 provided across the flow path of the cooling water W. It is heated through the heated second heat transfer member 34.

Here, since the temperature of the exhaust gas G is often higher than the boiling point of the cooling water W for temperature adjustment, the first heat transfer member 32 and the second heat transfer member after the heat storage member 31 is warmed. If the member 34 is connected via the fins 38 so that heat can be transferred, the cooling water W for temperature adjustment may be boiled.
Therefore, after the temperature of the heat storage member 31 becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the heat transfer between the first heat transfer member 32 and the second heat transfer member 34 is performed. It is possible to suitably prevent the cooling water W for temperature adjustment from being heated excessively and boiling.

  As described above, in the embodiment, the first heat exchange medium (exhaust gas G exhausted from the engine ENG) that flows through the first flow path (heat exchange unit 20) and the second flow path (heat The heat exchanging unit 30 is configured to perform heat exchange with the second heat exchange medium (cooling water W) flowing through the exchange unit 40) via the heat storage member 31, and the heat exchange unit The first heat transfer member 32 connected to 20 and the second heat transfer member 34 connected to the heat exchanging unit 40 are arranged inside the heat storage member 31 with an interval therebetween, and the first heat transfer member 34 is also connected. When the third heat transfer member (fin 38) provided on the heat member 32 is disposed in contact with the second heat transfer member 34, and the temperature of the heat storage member 31 becomes a predetermined temperature or higher (for example, 100 ° C. or higher). The first heat transfer member 32 and the second heat transfer member 34 are moved away from each other, and the fin 38 and the first heat transfer member 34 are moved away from each other. Of the heat transfer member 34 has a configuration in which a driving means for the non-contact (cylinder device 36).

If comprised in this way, while the temperature of the thermal storage member 31 is less than predetermined temperature (for example, less than 100 degreeC), the 1st heat-transfer member 32 and the 2nd heat-transfer member 34 will be via the fin 38. Since they are in direct contact, the heat exchange between the exhaust gas G flowing through the heat exchanging unit 20 and the cooling water W flowing through the heat exchanging unit 40 is in contact with each other so that heat can be transferred. The heat transfer member 32, the second heat transfer member 34, and the fins 38 are quickly performed. When the temperature of the heat storage member 31 becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the fin 38 and the second heat transfer member 34 are not in contact with each other, and therefore the exhaust gas G flowing through the exhaust pipe 10 Heat exchange with the cooling water W flowing through the heat exchange unit 40 is performed via the heat storage member 31 interposed between the first heat transfer member 32 and the second heat transfer member 34.
Therefore, even when the heat storage member 31 is not sufficiently warmed by the heat of the exhaust gas G just after the engine is started, heat exchange between the exhaust gas G and the cooling water W can be performed quickly.

  Further, at least one of the first heat transfer member 32 and the second heat transfer member 34 can be displaced in a direction in which the first heat transfer member 32 and the second heat transfer member 34 are separated from each other. The cylinder device 36 is provided on the second heat transfer member 34, and has a bottomed cylindrical cylinder member 36a with the wall portion 36a3 facing the first heat transfer member 32 side, While being provided in the heat transfer member 32, the valve part 36b2 fitted in the cylinder member 36a can be moved forward and backward in a direction in which the first heat transfer member 32 and the second heat transfer member 34 are separated from each other. And a phase change medium B that is filled between the bottom portion 36a2 of the cylinder member 36a and the valve portion 36b2 in the cylinder member 36a and whose volume changes with temperature. Yes, phase change media When the temperature is low (for example, below 100 ° C.), it solidifies and shrinks (the volume decreases), and when the temperature increases (for example, above 100 ° C.), it melts and expands (the volume increases). To be composed of materials.

With this configuration, when the temperature of the phase change medium B becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the phase change medium B melts and expands, so that the cylinder member 36a filled with the phase change medium B The bottom portion 36a2 and the valve portion 36b2 of the piston member 36b move so as to be separated from each other.
Then, the first heat transfer member 32 and the second heat transfer member 34 are displaced in directions away from each other, and the fins 38 and the second heat transfer member 34 are not in contact with each other. Heat exchange between the member 32 and the second heat transfer member 34 is performed via a heat storage member 31 interposed between the first heat transfer member 32 and the second heat transfer member 34.
When the temperature of the phase change medium B becomes less than a predetermined temperature (for example, less than 100 ° C.), the phase change medium B solidifies and contracts, so that the bottom portion 36a2 of the cylinder member 36a filled with the phase change medium B; At least one of the valve portions 36b2 of the piston member 36b moves in a direction approaching the other and returns to the reference position.
Then, the first heat transfer member 32 and the second heat transfer member 34 are in direct contact with each other via the fins 38, and heat exchange between the first heat transfer member 32 and the second heat transfer member 34 is performed. Is done quickly.
Therefore, even when the heat storage member 31 is not sufficiently warmed, heat exchange can be performed quickly.

  The first heat exchange medium is exhaust gas G of the internal combustion engine (engine ENG), and the second heat exchange medium is cooling water W for adjusting the temperature of the engine ENG.

With this configuration, when the temperature of the heat storage member 31 is low, such as immediately after the start of the engine ENG, heat exchange between the exhaust gas G and the cooling water W for temperature adjustment can be mutually conducted. Since the heat transfer is performed quickly via the first heat transfer member 32, the second heat transfer member 34, and the fins 38 that are in contact with each other, heat exchange is performed quickly even when the heat storage member 31 is not sufficiently warmed. be able to.
The first heat exchange medium may be a liquid for adjusting the temperature of the internal combustion engine (engine ENG) (cooling water W), and the second heat exchange medium may be the exhaust gas G of the engine ENG.

And if the temperature of the heat storage member 31 becomes more than predetermined temperature (for example, 100 degreeC or more), since the fin 38 and the 2nd heat-transfer member 34 will be in non-contact, the exhaust gas G which flows through the heat exchange part 20 Heat exchange between the first heat transfer member 32 and the second heat transfer member 34 is performed between the first heat transfer member 32 and the second heat transfer member 34. Done through.
Since the temperature of the exhaust gas G is often higher than the boiling point of the cooling water W for temperature adjustment, the first heat transfer member 32 and the second heat transfer member 34 can be obtained even after the heat storage member 31 is warmed. Are connected through the fins 38 so that heat can be transferred, the cooling water W for temperature adjustment may be boiled.
After the above configuration and the temperature of the heat storage member 31 reaches a predetermined temperature or higher (for example, 100 ° C. or higher), the heat transfer between the first heat transfer member 32 and the second heat transfer member 34 is performed. By performing the heat via the heat storage member 31, it is possible to suitably prevent the temperature-adjusting cooling water W from being heated excessively and boiling.

Next, a heat exchange device 30A according to the second embodiment will be described.
FIG. 5 is a diagram illustrating a heat exchange device 30A according to the second embodiment.

  The heat exchange device 30A according to the second embodiment includes a fin 38A1 fixed to the first heat transfer member 32 and a fin 38A2 fixed to the second heat transfer member 34. 32 and the second heat transfer member 34 are different from the configuration in which the fins 38 are provided only in the first heat transfer member 32 of the first embodiment described above in that they are arranged so as to be in contact with each other. .

In the heat exchange device 30A, the fins 38A1 and 38A2 are fixed to the outer circumferences of the first heat transfer member 32 and the second heat transfer member 34, respectively, and the fins 38A1 and 38A2 are connected to the first heat transfer member 32. And a plurality of heat transfer members 34 are provided at predetermined intervals in the longitudinal direction of the second heat transfer member 34.
The fins 38A1 of the first heat transfer member 32 extend from the outer periphery of the first heat transfer member 32 to the second heat transfer member 34 side, and the fins 38A2 of the second heat transfer member 34 are second The lengths of the fins 38A1 and 38A2 extend from the outer periphery of the heat transfer member 34 to the first heat transfer member 32 side, and the lengths of the fins 38A1 and 38A2 are the same as those of the first heat transfer member 32 and the second heat transfer member. It is set to be ½ or more of the distance L1 with the member 34.

  In the embodiment, for the fins 38A1 of the first heat transfer member 32 and the fins 38A2 of the second heat transfer member 34, the first heat transfer member 32 and the second heat transfer member 34 are arranged at the reference position. When touched, they come into contact.

In this state, when the heat of the exhaust gas G is transmitted to the first heat transfer member 32, the heated heat of the first heat transfer member 32 is supplied to the second heat via the fins 38A1 and 38A2 that are in contact with each other. It is transmitted directly to the heat transfer member 34.
For this reason, the heat of the exhaust gas G is quickly transmitted from the first heat transfer member 32 to the second heat transfer member 34, and therefore the second heat transfer member 34 is very short after the engine ENG is started. The cooling water W that exchanges heat with the water is warmed.

  When the heat storage member 31 and the phase change medium B are warmed by the heat of the exhaust gas G of the engine ENG, when the temperature of the warmed phase change medium B becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the solid The phase change medium B in the state melts to become a liquid state.

Then, the valve portion 36b2 of the piston member 36b located inside the cylinder member 36a is pushed to the first heat transfer member 32 side (left side in FIG. 2) by the phase change medium B expanded by melting, so that the piston member 36b Moves in a direction away from the second heat transfer member 34.
Thereby, the 1st heat transfer member 32 and the 2nd heat transfer member 34 move in the direction which mutually separates, and the 1st heat transfer member 32 and the 2nd heat transfer member 34 are FIG. If it moves to the operation position shown in (b), fin 38A1 of the 1st heat transfer member 32 and fin 38A2 of the 2nd heat transfer member 34 will be in a non-contact state.

  In this state, the heat of the first heat transfer member 32 warmed by the exhaust gas G is not directly transmitted to the second heat transfer member 34 through the fins 38A1 and 38A2, and therefore the first heat transfer member 32 The heat is transmitted to the second heat transfer member 34 through the heat storage member 31 surrounding the first heat transfer member 32.

  Thereby, in the heat exchange part 40, the heat of the 2nd heat-transfer member 34 is transmitted to the cooling water W through the warmed 2nd heat-transfer member 34.

  Therefore, the heat of the first heat transfer member 32 warmed by the heat of the exhaust gas G is directly transmitted to the second heat transfer member 34 through the fins 38A1 and 38A2 continuously for a long time after the engine ENG is started. Since the heat of the exhaust gas G is directly transmitted to the cooling water W, it is possible to prevent the cooling water W from boiling.

  As described above, in the second embodiment, heat exchange between the exhaust gas G flowing through the exhaust pipe 10 and the cooling water W flowing through the heat exchange unit 40 is performed via the heat storage member 31. The heat storage device 31 includes a first heat transfer member 32 connected to the heat exchange unit 20 and a second heat transfer member 34 connected to the heat exchange unit 40. And a fourth heat transfer member (fin 38A1) provided in the first heat transfer member 32 and a fifth heat transfer member (in the second heat transfer member 34) The fins 38A2) are disposed in contact with each other between the first heat transfer member 32 and the second heat transfer member 34, and when the temperature of the heat storage member 31 becomes equal to or higher than a predetermined temperature, the first heat transfer member 32 and the second heat transfer member 34 are moved away from each other, and the fins 38A1 and 38A2 are moved. And a cylinder device 36 for the contact.

If comprised in this way, while the temperature of the thermal storage member 31 is less than predetermined temperature (for example, less than 100 degreeC), the 1st heat-transfer member 32 and the 2nd heat-transfer member 34 will be the fin 38A1 and fin 38A2. Therefore, the heat exchange between the exhaust gas G flowing through the heat exchanging unit 20 and the cooling water W flowing through the heat exchanging unit 40 is in contact with each other so that heat can be transferred. The first heat transfer member 32, the second heat transfer member 34, the fins 38A1, and the fins 38A2 are quickly performed. When the temperature of the heat storage member 31 becomes equal to or higher than a predetermined temperature (for example, 100 ° C. or higher), the fins 38A1 and the fins 38A2 are not in contact with each other. Heat exchange with the cooling water W flowing therethrough is performed via a heat storage member 31 interposed between the first heat transfer member 32 and the second heat transfer member 34.
Therefore, even when the heat storage member 31 is not sufficiently warmed by the heat of the exhaust gas G, just after the engine ENG is started, heat exchange between the exhaust gas G and the cooling water W can be performed quickly.

  In the first and second embodiments described above, the present invention is applied to an exhaust heat recovery system that performs heat exchange between the exhaust gas of the engine and the cooling water of the engine. The exhaust gas may be applied to an exhaust heat recovery system that exchanges heat between the exhaust gas and the conditioned air supplied by the vehicle air conditioner (temperature-adjusted air).

  With this configuration, when the temperature of the heat storage member 31 is low, such as immediately after the start of the engine ENG, heat exchange between the exhaust gas G and the conditioned air flowing through the flow path of the air conditioner is mutually performed. Since the heat transfer is performed quickly via the first heat transfer member 32, the second heat transfer member 34, and the fin 38 that are in contact with each other, heat exchange can be performed even when the heat storage member 31 is not sufficiently warmed. Can be done quickly.

In the above embodiment, the first heat transfer member 32 and the second heat transfer member 34 are solid columnar members, but the present invention is not limited to this as long as it has a heat transferable shape.
For example, the heat transfer member may have a prismatic shape, and in this case, the other end 38b of the fin 38 is formed in a flat surface instead of an arc shape.
In this case, when the first heat transfer member 32 and the second heat transfer member 34 are at the reference position, the other end 38b of the fin 38 formed on the plane and the heat transfer member are in contact with each other on the surface. The contact area can be widened. Therefore, the heat of the first heat transfer member 32 can be efficiently transferred to the second heat transfer member 34 via the fins 38.

The first heat transfer member 32 and the second heat transfer member 34 may be hollow members. In such a case, it is preferable to fill the hollow portion with a medium having high thermal conductivity.
When the first heat transfer member 32 and the second heat transfer member 34 are hollow members, the heat of the exhaust gas G exhausted from the engine ENG is obtained from the meat portion of each heat transfer member and the medium having high thermal conductivity. Therefore, heat exchange between the first heat transfer member 32 and the second heat transfer member 34 can be reliably performed.

In the above-described embodiment, the first heat transfer member 32 is configured to displace the first heat transfer member 32 with respect to the second heat transfer member 34. Both of the two heat transfer members 34 may be displaced.
In this way, the amount of movement of the cylinder member 36a and the piston member 36b for separating the first heat transfer member 32 and the second heat transfer member 34 can be reduced, and the first heat transfer member 32 and The second heat transfer member 34 can be quickly switched between the reference position and the operating position.
Further, the second heat transfer member 34 may be in a cantilever state, and the second heat transfer member 34 may be displaced with respect to the first heat transfer member 32. Even if it does in this way, there can exist the same effect.

In the above embodiment, the fin 38 is a plate-shaped member having a thickness. However, the fin 38 is not limited to this as long as it has a shape capable of transferring heat.
For example, the fins 38 may be formed in a column shape, and similar effects can be obtained even in this way.

In the above embodiment, the cylinder device 36 and the plurality of fins 38 are arranged in this order from the other end 32b side of the first heat transfer member 32. The heat transfer member 32 may be disposed at any position in the longitudinal direction of the first heat transfer member 32 and the second heat transfer member 34.
For example, when the second heat transfer member 34 is displaced with respect to the first heat transfer member 32, the second heat transfer member 34 may be disposed closer to the one end 34 a side of the second heat transfer member 34 than the fins 38. preferable.

In the above embodiment, the medium that performs heat exchange with the exhaust gas G discharged from the engine ENG is the cooling water W that adjusts the temperature of the engine ENG or the conditioned air that flows through the flow path of the air conditioner. However, the present invention is not limited to this, and for example, a medium that performs heat exchange may be an adsorbent used in a humidity control apparatus that adjusts air humidity using an adsorbent.
Even in this case, heat exchange between the exhaust gas G of the engine ENG and the adsorbent can be quickly performed even in a state where the temperature of the heat storage member is low just after the start of the engine ENG.

  The present invention is not limited to the above-described embodiments, and includes various changes and improvements that can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Exhaust heat recovery system 10 Exhaust pipe 20 Heat exchange part 30 Heat exchange apparatus 31 Heat storage member 32 1st heat transfer member 34 2nd heat transfer member 36 Cylinder apparatus 36a Cylinder member 36a1 Cylindrical part 36a2 Bottom part 36a3 Wall part 36a4 Through-hole 36b Piston member 36b1 Shaft part 36b2 Valve part 36c Seal ring 37a Sealed space 37b Release space 38 Fin 40 Heat exchange part 41 Piping ENG Engine B Phase change medium G Exhaust gas P Pump W Cooling water

Claims (5)

The heat exchange between the first heat exchange medium flowing through the first flow path and the second heat exchange medium flowing through the second flow path is performed via the heat storage member. A heat exchange device,
While arrange | positioning the 1st heat-transfer member connected to the said 1st flow path, and the 2nd heat-transfer member connected to the said 2nd flow path at intervals inside the said thermal storage member, A third heat transfer member provided on the first heat transfer member is placed in contact with the second heat transfer member;
When the temperature of the heat storage member is equal to or higher than a predetermined temperature, the first heat transfer member and the second heat transfer member are moved away from each other, and the third heat transfer member and the second heat transfer member are moved. A heat exchanging device, characterized in that a drive means for making contact with the heat transfer member is provided. The heat exchange between the first heat exchange medium flowing through the first flow path and the second heat exchange medium flowing through the second flow path is performed via the heat storage member. A heat exchange device,
While arrange | positioning the 1st heat-transfer member connected to the said 1st flow path, and the 2nd heat-transfer member connected to the said 2nd flow path at intervals inside the said thermal storage member, The fourth heat transfer member provided on the first heat transfer member and the fifth heat transfer member provided on the second heat transfer member are combined with the first heat transfer member and the second heat transfer member. Arranged in contact with each other between the heat transfer members,
When the temperature of the heat storage member is equal to or higher than a predetermined temperature, the first heat transfer member and the second heat transfer member are moved away from each other, and the fourth heat transfer member and the fifth heat transfer member are moved. A heat exchanging device, characterized in that a drive means for making the heat transfer member non-contact is provided. At least one of the first heat transfer member and the second heat transfer member can be displaced in a direction in which the first heat transfer member and the second heat transfer member are separated from each other. ,
The driving means includes
A cylinder member with a bottomed cylindrical shape that is provided on the first heat transfer member and has an opening directed to the second heat transfer member side;
A valve portion provided in the second heat transfer member and fitted in the cylinder member moves forward and backward in a direction to separate the first heat transfer member and the second heat transfer member from each other. A piston member made possible;
In the cylinder member, a cylinder device having a medium that is filled between the bottom of the cylinder member and the valve portion and changes in volume according to temperature,
The heat exchange apparatus according to claim 1 or 2, wherein the volume of the medium decreases as the temperature decreases and increases as the temperature increases.   The first heat exchange medium is an exhaust gas of an internal combustion engine or a liquid for adjusting the temperature of the internal combustion engine, and the second heat exchange medium is a liquid for adjusting the temperature of the internal combustion engine or an exhaust of the internal combustion engine. It is gas, The vehicle heat exchanger as described in any one of Claims 1-3 characterized by the above-mentioned.   The first heat exchange medium is exhaust gas of an internal combustion engine or conditioned air flowing through the flow path of the air conditioner, and the second heat exchange medium is conditioned air flowing through the flow path of the air conditioner. 4. The vehicle heat exchanger according to claim 1, wherein the vehicle heat exchanger is exhaust gas of the internal combustion engine. 5.

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