DE102007006169A1 - Device for heat recovery - Google Patents

Abstract

A heat recovery apparatus has an evaporator part (1) for evaporating an internal fluid, and a condenser part (2) for condensing the inside of the evaporator part (1) vaporized fluid). The evaporator section (1) and the condenser section (2) communicate with each other via a looped or looped channel in which the internal fluid circulates. The evaporator part (1) has evaporator heat pipes (3a) and evaporator fins (4a). Each of the heat pipes (3a) has flange portions (33a) at its longitudinal ends. The flange portions (33a) project in a direction perpendicular to the longitudinal direction of the evaporator heat pipe (3a) and are of a tubular shape. The evaporator heat pipes (3a) and the evaporator fins (4a) are alternately stacked and brazed, and the flange parts (33a) of the adjacent evaporator heat pipes (3a) are coupled with and brazed against each other such that the joint parts (6a) are formed by the coupled flange portions (33a) and the longitudinal ends of the evaporator heat pipes (3a).

Description

The The present invention relates to a device for heat recovery, which is used for example in a vehicle application.

Known is the so-called principle of using the "heat pipe", also called "heat pipe", in a heat exchanger, as disclosed, for example, in Japanese Unexamined Patent Publication No. 4-45393. In this heat exchanger are an evaporator part and a condenser part on a closed Circulation path arranged. The circulation path forms a closed one Loop. An evaporable and condensable heat transfer fluid is included in the closed circulation path.

Of the Evaporator part accomplishes the heat exchange between the heat transfer fluid and an external fluid, whereby the heat transfer fluid is evaporated. The condenser part is higher in one place than arranged the evaporator part. The condensing part or condenser part takes the heat exchange between the heat transfer fluid, which has been evaporated in the evaporator part, and an external fluid before, whereby the heat transfer fluid is condensed.

It has also been proposed to use a looped heat pipe heat exchanger heat exchanger as a heat recovery device in a vehicle. For example, an evaporator part is disposed in an exhaust pipe of a vehicle for recovering heat from an exhaust gas, the heat may be used for a warm-up operation. 7 shows an example of the device used in a vehicle for heat recovery. The heat recovery device has an evaporator part J1 and a condenser part J2, both of which include heat pipes J3. Longitudinal ends of the heat pipes J3 are coupled with collectors (connection parts) J6. This heat recovery device is manufactured in the following manner, for example.

First, be assembled the components J3, J4, J6. For example the ends of the heat pipes J3 in slotted holes introduced by the collector J6 and ribs J4a, J4b interposed between the heat pipes J3. Then this arrangement becomes preliminary fixed with fixing or stapling means, for example by teaching, by applying loads in two directions. In particular, be the loads in a direction perpendicular to the heat pipes for fixing the heat pipes J3 and the ribs J4a, J4b in a direction parallel to the heat pipes J3 for fixing the collector J6 with respect to the heat pipes J3 attached. In this condition, the entire assembly is heated by heating means, the component parts J3, J4, J6 are thus soldered together.

The The above components are made of stainless steel, for example manufactured with high corrosion resistance. Since the evaporator part J1 high temperature is exposed in the exhaust pipe, a nickel alloy as soldering material used for soldering. However, since the melting point of the nickel alloy is high, a high soldering temperature required. It thus becomes difficult to load in two directions under such high soldering temperature while of soldering applied.

Farther The evaporator part J1 thermally expands due to the high temperature in the exhaust pipe. In this construction, thermal stresses due to thermal expansion and contraction of the heat pipes (arrows X) and thermal Expansion and contraction of the collector J6 (arrows Y) concentrated on connecting, joint or abutting parts between the heat pipes J3 and the collectors J6. This will break the joints or joints to lead.

in the In view of the above, the present invention has been made: It is an object of the present invention to provide a device for heat recovery, which can be produced in an improved manner put. Another object of the present invention is a device for heat recovery, in which thermal stresses can be reduced.

According to one Aspect of the present invention has a device for heat recovery via a Evaporator and a capacitor part. The evaporator part and the capacitor part are arranged in a looped path, through which circulates an internal fluid. The evaporator part takes the Heat exchange between the inner fluid and a first fluid, whereby the internal fluid is evaporated. The condenser part takes the heat exchange between the evaporated in the evaporator part inner fluid and a second fluid over a temperature lower than that of the first fluid, thereby the inner fluid is condensed.

The evaporator section has a variety of evaporator heat pipes and evaporator fins. Each of the evaporator heat pipes has flange portions protruding from its longitudinal ends in a direction perpendicular to a longitudinal direction of the evaporator tube. Each flange part has a tubular shape. The evaporator heat pipes and the evaporator fins are alternately stacked and in a direction perpendicular to the longitudinal direction the evaporating heat pipes soldered; the flange portions of the adjacent evaporator heat pipes are coupled with and brazed to each other so that the evaporator joints are formed by the flange portions and the longitudinal ends of the evaporator heat pipes.

at This construction is because the connecting parts by coupling the flange parts of the evaporator heat pipes are formed, the Device for heat recovery soldered in a state where it is held in one direction, that is, perpendicular in one direction to the longitudinal direction the evaporator heat pipes. The device for heat recovery is easily assembled and soldered.

According to one Second aspect of the present invention is the evaporator part and the condenser part arranged close to each other and via coupling elements coupled. Thus, a compact heat recovery device for disposal posed. For example, the evaporator part and the condenser part coupled so that the evaporator heat pipes and condenser heat pipes are arranged parallel to each other. In this case, the evaporator part and the capacitor part is soldered together integrally. hereby the manufacturability is improved.

According to one In the third aspect of the present invention, the evaporator part has stress absorbing Parts in the connecting sections. Since the evaporator part in the flow of the first fluid of high temperature is placed, thermal expansion caused. Because the heat expansion in a rich direction perpendicular to the longitudinal direction of the evaporator heat pipes is absorbed by the stress absorbing part, the thermal stress reduced.

For example embodiments of the invention will now be described with reference to the accompanying drawings, in which in which similar Parts with similar reference numbers are provided, closer explained become. In these show:

1 a schematic section through a device for heat recovery according to a first embodiment of the invention;

2 a section through an evaporator heat pipe of the heat recovery device according to the first embodiment;

3 a schematic section through a device for heat recovery according to a second embodiment of the present invention;

4 a schematic section through an evaporator connection part of a device for heat recovery according to a third embodiment of the invention;

5 a section through an evaporator heat pipe of a device for heat recovery according to a fourth embodiment of the present invention;

6 a section through an evaporator-connecting portion of a device for heat recovery according to another embodiment of the present invention; and

7 a schematic section through a device for heat recovery according to another type.

First Embodiment

A first embodiment of the present invention will now be described with reference to FIGS 1 and 2 to be discribed. For example, a heat recovery apparatus is mounted on a vehicle and receives exhaust heat from an exhaust gas of a vehicle engine exhaust system, and uses the collected heat as a heat source for an air conditioner or the like.

As in 1 As shown, the heat recovery device has an evaporator section 1 and a capacitor part 2 which are arranged close to each other. The evaporator part 1 is in an evaporator housing 100 housed, which is arranged in an exhaust pipe (not shown) of the engine. The evaporator part 1 takes the heat exchange between the exhaust gas and a heat transfer fluid (inner fluid), whereby the heat transfer fluid is evaporated.

The capacitor part 2 is located outside the exhaust pipe. The capacitor part 2 is in a capacitor housing 200 disposed in a cooling water passage (not shown) through which an engine cooling water circulates. The capacitor part 2 takes the heat exchange between the heat transfer fluid in the evaporator part 1 has evaporated and the engine cooling water, whereby the heat transfer fluid is condensed.

Next, the structure of the evaporator part 1 to be discribed. The evaporator part 1 has a first heat exchanger section 5a , The first heat exchanger section 5a includes evaporator heat pipes 3a and evaporator ribs 4a , The evaporator ribs 4a For example, corrugated fins and outer surfaces of the evaporator heat pipes 3a connected.

Each of the evaporator heat pipes 3a is of flat tubular shape. The evaporator heat pipes 3a are arranged parallel to each other and extend in the vertical direction (arrow A1 in FIG 1 ). 2 gives the cross section of the evaporator heat pipe 3a defined in a direction perpendicular to a longitudinal direction of the evaporator heat pipe 3a , again.

Every evaporator heat pipe 3a is arranged such that a longitudinal axis of its cross section is parallel to a flow direction of the exhaust gas. That is, the up / down direction of the 2 corresponds to the flow direction of the exhaust gas. In 1 corresponds to the direction perpendicular to the plane of the flow direction of the exhaust gas.

The evaporator part 1 has evaporator collector 6a (vaporizing joints) at the longitudinal ends of the evaporator heat pipes 3a , The evaporator collector 6a extend in a direction in which the heat pipes 3a stacked (arrow A2). The evaporator collector 6a stand in connection with all heat pipes 3a ,

Here is one of the evaporator collectors 6a attached to the upper ends of the heat pipes 3a is arranged as the first evaporator collector 61a designated. The other evaporator collector 6b attached to the lower ends of the heat pipes 3a is arranged, is the first backflow collector 62a designated.

As 2 Recognize is every evaporator heat pipe 3a built from a pair of molded plates 31a . 32a as evaporating heat pipe elements, each having a substantially flat shape and a substantially U-shaped cross-section. The shaped plates or sheets 31a . 32a face each other so that an evaporator tube space is defined between them.

In addition, each of the molded plates has 31a . 32a a pair of evaporator flange parts 33a at the longitudinal ends. Each evaporator flange part 33a stands in one direction of the pipe 3a outward. The flange part 33a has a substantially tubular shape and defines an opening at one end. The shaped plates 31a . 32a face each other so that the flange parts 33a protrude in opposite directions.

A diameter of the opening of the flange part 33a one of the pairs of molded plates 31a . 32a is larger than a diameter of the opening of the flange part 33a the other of the pair of molded plates 31a . 32a , Thus, the end of the flange is 33a a heat pipe 3a received in and captured by the end of the flange 33a of the adjacent heat pipe 3a ,

Next will be the construction of the condenser part 2 described. As in 1 shown, has the capacitor part 2 a second heat exchanging section 5b , The second heat exchanging section 5b includes condensing heat pipes 3b and condenser ribs 4b , The capacitor ribs 4b For example, are straight ribs and are with the outer surfaces of the condenser heat pipes 3b connected.

Each of the condenser heat pipes 3b is of a flat pipe shape, similar to the evaporator heat pipes 3a , The condenser heat pipe 3b is arranged such that its main axis extends in its cross section, defined as perpendicular to the longitudinal direction, parallel to a flow direction of the cooling water. Furthermore, the condenser heat pipes 3b arranged parallel to each other and extending in the vertical direction (arrow A1).

The condensing part 2 continues to have condensing collectors 6b at the longitudinal ends of the condensing heat pipes 3b as condensing connecting parts or sections. The condenser collector 6b extend in the direction (arrow A2), in which the condenser heat pipes 3b are arranged and stand with all the condenser heat pipes 3b in connection.

One of the condenser collectors 6b attached to the upper ends of the condenser heat pipes 3b is arranged as a second evaporator collector 61b designated. The other of the condenser collectors 6b attached to the lower ends of the condenser heat pipes 3b is arranged as a second return current collector 62b designated.

Similar to the evaporator heat pipes 3a is each of the condenser heat pipes 3b from a pair of shaped plates 31b . 32b constructed as a condenser heat pipe elements. The condenser heat pipes 3b have similar cross section as the evaporator heat pipes 3a , as in 2 shown. Each of the molded plates 31b . 32b has a substantially plate shape and is of substantially U-shaped cross-section. The shaped plates 31b . 32b face each other such that a condenser tube space is defined between them.

Furthermore, each of the molded plates has 31b . 32b a pair of condensing flange parts 33b at the longitudinal ends. Each condensing flange part 33b stands in one direction outward, from the heat pipe 3b seen from before. The flange part 33b has a substantially tubular shape Shape and defines an opening at its end. The molded pipes 31a . 32b face each other in such a way that the flange parts 33b protrude in opposite directions.

The diameter of the opening of the flange part 33b one of the pairs of molded plates 31b . 32b is larger than a diameter of the opening of the flange part 33a the other of the pair of molded plates 31b . 32b , This is the end of the flange part 33b a heat pipe 3b received in and captured by the end of the flange 33b of the adjacent heat pipe 3b ,

Furthermore, there are inner ribs 34 in the evaporator heat pipes 3a and the condenser heat pipes 3b provided to increase the heat transfer surfaces and thus the heat exchange efficiency, as in 2 shown to improve.

The evaporator collector 6a and the capacitor collector 6b communicate with each other via coupling tubes (coupling elements) 7 that are ever pipe-shaped. The evaporator and condenser heat pipes 3a . 3b and the evaporator and condenser collectors 6a . 6b and the coupling tubes 7 form a closed path or channel. The vaporizable and condensable heat transfer fluid, such as water or alcohol, is trapped in the closed path or channel.

Because the coupling tubes 7 between the evaporator collectors 6a and the condenser collectors 6b (evaporating or condensing collector) are provided, a gap remains 8th between the evaporator part 1 (Evaporator housing 100 ) and the condenser part 2 (Condenser housing 200 ). The evaporator part 1 and the capacitor part 2 are thermally through the gap 8th isolated.

Next, a method of manufacturing the heat recovery apparatus will be described. First, the evaporator mold plates 31a . 32a put in pairs. The paired mold plates 31a . 32a and the evaporator ribs 4 are alternately in the direction perpendicular to the longitudinal direction of the evaporator heat pipes 3a in the evaporator housing 100 stacked. This will grip the ends of the evaporator flange parts 33a the adjacent evaporator heat pipes 3a into each other and make the connection to each other. This is how the evaporator collectors become 6a through the coupled evaporator flange parts 33a and the longitudinal ends of the evaporator heat pipes 3a built.

Similarly, the condensing mold plates 31b . 32b in pairs. The paired mold plates 31b . 32b and the capacitor ribs 4b be alternately in the direction perpendicular to the longitudinal direction of the condenser heat pipes 3b in the capacitor housing 200 stacked. This will grip the ends of the capacitor flange parts 33b the adjacent condenser heat pipes 3b into each other and make the connection to each other. This will be the capacitor collector 6b through the coupled capacitor flange parts 33b and the longitudinal ends of the condenser heat pipes 3b built up.

Then the coupling tubes 7 between the evaporator collectors 6a and the condenser collectors 6b coupled. Thus, all components 100 . 200 . 31a . 32a . 31b . 32b . 4a . 4b in one direction (stacking direction, arrow A2) stacked.

afterwards The stacked components are taught by a teaching, not shown held and fixed or stapled in the stacking direction such that the predetermined load can be applied in the stacking direction. In this condition, the stacked components are placed in the oven and warmed up. Thus, the component parts are soldered integrally as a unit.

Namely, there are the connecting parts between the heat pipes 3a . 3b , the ribs 4a . 4b and the collectors 6a . 6b and the coupling tubes 7 soldered. In this case, the molded plates 31a . 32a . 31b . 32b soldered simultaneously with soldering with other components. That is, the heat pipes 3a . 3b are formed simultaneously with the joint soldering. In this embodiment, all the components are made of stainless steel, and a nickel alloy is used as the soldering material.

As described above, the heat pipes become 3a . 3b Shaped by the shaped plates 31a . 32a . 31b . 32b arranged in pairs and soldered together, and the heat pipes 3a . 3b and the ribs 4a . 4b are stacked alternately. Therefore, the temporarily assembled components are held only in one direction during soldering. Namely, the load is applied only in the stacking direction during soldering. Thus, it is easy to assemble and solder all the components of the heat recovery device.

In this embodiment, the evaporator part 1 and the capacitor part 2 arranged close together. For example, the evaporator part 1 and the capacitor part 2 arranged such that the evaporator collector 6a and the capacitor collector 6b are aligned with respect to each other. The heat recovery device is there Smaller in size and easy to bring to the vehicle. Furthermore, since the evaporator part 1 and the capacitor part 2 be soldered at the same time, reduces the manufacturing steps.

Second Embodiment

A second embodiment will now be described with reference to 3 to be discribed. Here, similar components have the same reference numerals, their description is therefore omitted.

As in 3 shown has the evaporator mold plate 31a which is one of the paired plates, a first bellows part 9 as a tension absorbing part and extends from the flange part 33a , The first bellows part (bellows portion) 9 is integral with the flange part 33a educated. The end of the first bellows part 9 defines an opening and is configured to engage the end of the flange portion 33a the shaped plate 32a the adjacent evaporator heat pipe 3a comes.

The first bellows part 9 is with first bulges or beads 91 Mistake. In the example of 3 become two first bulges 91 shaped. The first bulges 91 can expand and contract in a radial direction to the first bellows part 9 , Each of the first bulges 91 protrudes radially outward in a direction and extends completely in a circumferential direction of the first bellows part 9 , Thus, the first bellows part lies 9 in the form of bellows and can expand and contract, that is, it is elastic in the stacking direction (arrow A2) of the evaporator heat pipes 3a ,

Furthermore, the evaporator part 1 and the capacitor part 2 via bellows coupling pipes with second bellows parts 10 as tension absorbing parts instead of the straight coupling parts 7 connected to the first embodiment. The bellows coupling tubes are formed as separate parts and engage with the first bellows part 9 of the evaporator heat pipe 3a which is adjacent to the condenser part 2 is arranged, and the flange part 33b the condenser heat pipe 3b adjacent to the evaporator section 1 is arranged.

Each of the second bellows parts 10 is with second bulges 101 shaped. After the example of 3 are three second bulges 101 educated. Each of the second courses 101 protrudes radially outward and extends completely in a circumferential direction of the second bellows part 10 , The second bellows parts 101 may be in a radial direction of the second bellows part 10 expand and contract. Namely, the bellows coupling pipe is in the form of bellows and thus can expand and contract, that is, it is elastic in the stacking direction (arrow A2) of the evaporator heat pipes 3a ,

Because the number of bulges 101 every second bellows part 10 bigger than the bulges 91 of the first bellows part 9 is, is the second bellows part 10 more elastic than the first bellows part 9 ,

When next should the operation of the heat recovery device to be discribed.

Since the evaporator part 1 In the exhaust pipe of the engine, not shown, it is constantly exposed to high temperatures. Thus, the evaporator heat pipes become 3a and the evaporator collectors 6a significantly expand and contract. Because the first bellows parts 9 in the stacking direction of the evaporator heat pipes 3a are elastic, the heat expansion in the stacking direction of the evaporator heat pipes 3a absorbed. Because the bulging parts continue 91 in the longitudinal direction of the evaporator heat pipes 3a expand and contract, the heat expansion in the longitudinal direction of the evaporator heat pipes 3a absorbed.

The evaporator part 1 is heated high by the exhaust gas while the condenser part 2 is cooled by the engine cooling water to a relatively low temperature. There is thus a large temperature difference between the evaporator part 1 and the condenser part 2 , causing significant thermal stresses between the evaporator part 1 and the condenser part 2 causes. In this case, since the second bellows parts 10 are elastic, more elastic than the first bulge parts 9 that absorbs thermal stress due to the temperature difference.

According to the second embodiment described above, the heat expansion in the stacking direction of the evaporator heat pipes 3a through the first bellows parts 9 absorbed, and the thermal expansion in the longitudinal direction of the evaporator heat pipes 3a gets through the first bulges of the first bellows parts 9 absorbed. Therefore, the thermal stress is reduced to the connecting parts of the respective components.

In addition, the thermal stress between the evaporator part 1 and the condenser part 2 due to the temperature difference between them effectively through the second bulge parts 10 absorbed, the higher elastic than the first bulge parts 9 are.

Third Embodiment

Regarding 4 become the first bellows parts 9 shaped as separate parts. The ends of each first bellows part 9 engage with the ends of the flange parts 33a the evaporator form plates 31a . 32a , Also in this embodiment similar advantageous effects are used.

In addition, the first bellows parts 9 separated from the evaporator mold plates 31a . 32a are formed, the first bulges can be 91 simpler shapes, compared with the case where the first bulges 9 integral with the flange parts 33a the mold plates 31a . 32a are shaped.

Fourth Embodiment

A fourth embodiment will now be described with reference to FIGS 4 and 5 to be discribed. Similar components are designated by like reference numerals, the description of which is thus omitted.

The structure of the mold plates or molded plates 31a . 32a . 31b . 32b can be modified. How out 5 to recognize each of the evaporator mold plates 31a . 32a formed by a plate or a sheet is bent substantially in U-shape. Every mold plate 31a . 32a has a flat part 310a . 320a and a pair of side panels 311 . 321a on the sides of the flat parts 310a . 320a , The side parts 311 . 321a lie substantially perpendicular to the flat part 310a . 320a ,

A removal of the side parts 311 the evaporator mold plate 31a is less than a distance of the side plates 321a the evaporator mold plate 32a , Thus grei fen the evaporator mold plates 31a . 32a in such a way that the side parts 311 with the inner surfaces of the side parts 321a overlap.

The mold plates 31b . 32b the condenser heat pipes 3b have flat parts 310b . 320b and side panels 311b . 321b and grip similar to the mold plates 31a . 32a the evaporator heat pipes 3a each other. Also in this embodiment, similar advantages and effects are achieved.

Other Embodiments

In the second embodiment, two bulges 91 on every first bellows part 9 educated. However, the number of bulges 91 not limited to two. For example, the first bellows part has 9 a bulge 91 , as in 6 shown. Also, it is not always necessary that the heat recovery device both, the first bellows parts 9 and the second bellows parts 10 , Has. For example, the second bellows part 10 be eliminated depending on the application.

In the above embodiments, the evaporator collectors 61a . 61b the return flow collector 62a . 62b the same dimension in the longitudinal direction as the heat pipes 3a . 3b , However, the evaporator collectors can 61a . 61b and the backflow collectors 62a . 62b have different dimensions, as long as only the dimensions of the evaporator collector 61a . 61b larger than the return current collector 62a . 62b is.

In the above embodiments, the inner ribs 34 in the heat pipes 3a . 3b intended. However, the inner ribs can 34 be omitted.

Also, it is not always necessary that the evaporator part 1 and the capacitor part 2 are arranged close to each other. evaporator part 1 and capacitor part 2 can be arranged separately or separately. Also, the structure of the capacitor part 2 not necessarily limited to the illustrated construction.

In the above embodiments, each heat pipe is 3a . 3b built from the pair of mold plates 31a . 32a . 31b . 32b , However, it is not always necessary that the heat pipe 3a . 3b from two shaped plates 31a . 32a . 31b . 32b is formed.

In the above embodiments, the coupling pipes are formed as separate parts. However, the coupling tubes may be integral with one of the group of evaporator heat pipes 3a and condenser heat pipe 4a be formed. Furthermore, the above embodiments can be used with any combinations.

Also, the arrangement of evaporator part 1 and capacitor part 2 not limited to the exhaust pipe and to the engine cooling water channel. Furthermore, in the evaporator part 1 recovered heat for any other purpose use find. Also, the use of the heat recovery device is not limited to the vehicle, but can be used for other purposes.

For example embodiments The present invention has been described above. however however, the present invention is not limited to these embodiments rather, in a different manner without departing from the scope of the invention deviate, be implemented.

Claims (12)

Apparatus for recovering heat comprising: an evaporator part ( 1 ) for carrying out the heat exchange between an inner fluid and a first fluid through which the inner fluid ver is steamed; and a capacitor part ( 2 ) for carrying out the heat exchange between the in the evaporator part ( 1 ) evaporated inner fluid and a second fluid having a temperature lower than the temperature of the first fluid, whereby the inner fluid is condensed, wherein evaporator part ( 1 ) and capacitor part ( 2 ) in conjunction with each other via a channel loop for circulation of the internal fluid thereby, the evaporator section ( 1 ) via a plurality of evaporator heat pipes ( 3a ) and evaporator ribs ( 4a ), and each of the evaporator tubes ( 3a ) Flange parts ( 33a ), which from its longitudinal ends in a direction perpendicular to the longitudinal direction of the evaporator heat pipe ( 3a ) and are each of tubular shape, and the evaporator heat pipes ( 3a ) and the evaporator ribs ( 4a ) alternately in a direction perpendicular to the longitudinal direction of the evaporator heat pipes ( 3a ) are stacked and soldered, and the flange parts ( 33a ) of the adjacent evaporator heat pipes ( 3a ) are coupled with and soldered to each other, such that the evaporator connection parts ( 6a ) through the flange parts ( 33a ) and the longitudinal ends of the evaporator heat pipes ( 3a ) are provided. A heat recovery apparatus according to claim 1, wherein each of said evaporator heat pipes ( 3a ) is constructed from a first evaporator heat pipe element ( 31a ) and a second evaporator heat pipe element ( 32a ), which depending on the flange ( 33a ) at their longitudinal ends, and wherein the first and second evaporator heat pipes ( 31a . 32a ) are arranged such that the flange parts ( 33a ) protrude in opposite directions and in a between the evaporator ribs ( 4a ) arranged state can be soldered. Heat recovery device according to claim 1 or 2, wherein the capacitor part ( 2 ) via a plurality of condensing heat pipes ( 3b ) and condensing ribs ( 4b ), each of the condenser heat pipes ( 3b ) Flange parts ( 33b ), which from their longitudinal ends in a direction perpendicular to the longitudinal direction of the condenser heat pipe ( 3b ) and each have a tubular shape, the condenser heat pipes ( 3b ) and the capacitor ribs ( 4b ) alternately in a direction perpendicular to a longitudinal direction of the condenser heat pipes ( 3b ) are stacked and soldered, and the flange parts ( 33b ) of the adjacent condenser heat pipes ( 3b ) are coupled with and soldered to each other, such that the capacitor connection parts ( 6b ) through the flange parts ( 33b ) and the longitudinal ends of the condenser heat pipes, wherein the heat recovery device further comprises: coupling elements ( 7 . 10 ) for coupling the evaporator connection parts ( 6a ) and the capacitor connection parts ( 6b ), and wherein evaporator part ( 1 ) and capacitor part ( 2 ) are arranged close to each other. Heat recovery device according to claim 3, wherein the evaporator part ( 1 ) and the capacitor part ( 2 ) are coupled such that the evaporator heat pipes ( 3a ) parallel to the condenser heat pipes ( 3b ) are arranged, and at least one of the evaporator connection parts ( 6a ) is aligned on one of the capacitor connection parts ( 6b ). A heat recovery apparatus according to claim 3 or 4, wherein each of the condenser heat pipes ( 3b ) is constructed from a first condenser heat pipe element ( 31b ) and a second condenser heat pipe element ( 32b ), which depending on the flange ( 33b ) at their longitudinal ends, and the first and second condenser heat pipe elements ( 31b . 32b ) are arranged such that the flange parts ( 33b ) protrude in opposite directions and in one between the condensing fins ( 4b ) arranged state can be soldered. A heat recovery device according to any one of claims 3 to 5, wherein each of the coupling elements is of tubular shape including stress absorbing parts ( 10 . 101 ), and the stress absorbing parts are configured to allow expansion and contraction of the coupling elements in one of their longitudinal directions. Heat recovery device according to one of claims 2 to 6, wherein the flange part ( 33a ) one of the first and second evaporator heat pipe elements ( 31a . 32a ) via a voltage-absorbing part ( 9 ), and the stress absorbing part ( 9 ) is configured to allow expansion and contraction in a direction perpendicular to the longitudinal direction of the evaporator heat pipe ( 3a ) allows. A heat recovery device according to claim 7, wherein said stress absorbing member (16) 9 ) has a bulge, which in a radial direction to the flange ( 33a ) projects over its entire circumference and allows expansion and contraction in a radial direction. A heat recovery apparatus according to claim 8, wherein said stress absorbing member ( 9 ) is formed by a bulge part. Heat recovery apparatus according to any one of claims 1 to 9, wherein the evaporator part ( 1 is disposed in an exhaust passage through which an exhaust gas discharged from an engine flows, and wherein the first fluid is the exhaust gas, the condenser part 2 ) is disposed in a cooling water passage through which an engine cooling water flows, and the second fluid is the engine cooling water itself. Apparatus for recovering heat comprising: an evaporator part ( 1 ) for effecting heat exchange between an internal fluid and a first fluid, whereby the internal fluid is evaporated; and a condensing part or condensing part ( 2 ) for effecting the heat exchange between the inner part of the evaporator ( 1 ) evaporated fluid and a second fluid of a temperature lower than the temperature of the first fluid, whereby the inner fluid is condensed, wherein the evaporator part ( 1 ) and the capacitor part ( 2 ) in conjunction with each other via a looped path for the circulation of the internal fluid thereby, wherein the evaporator part ( 1 ) via a plurality of evaporator heat pipes ( 3a ), Evaporator ribs ( 4a ) alternating with the evaporator heat pipes ( 3a ) are stacked, as well as connecting parts ( 6a ) at longitudinal ends of the evaporator heat pipes ( 3a ), the connecting parts ( 6a ) in a direction perpendicular to a longitudinal direction of the evaporator heat pipes ( 3a ) and define parts of the looped path, and the connecting parts ( 6a ) Bulges ( 91 ), which allow the thermal expansion and contraction as voltage-absorbing elements. A heat recovery device according to claim 11, wherein the condenser part ( 2 ) via a plurality of condenser heat pipes ( 3b ), Condenser ribs ( 4b ) alternating with the condenser heat pipes ( 3b ) are stacked, as well as connecting parts ( 6b ) at longitudinal ends of the condenser heat pipes ( 3b ), wherein the heat recovery device further comprises: coupling tubes ( 7 ) connecting the connecting parts ( 6a ) of the evaporator part ( 1 ) and the connecting parts ( 6b ) of the capacitor part ( 2 ), wherein the coupling tubes ( 7 ) and the connecting parts ( 6a . 6b ) are aligned with respect to each other.