WO2017047562A1 - Thermoelectric power generation device and method for manufacturing same - Google Patents

Abstract

A thermoelectric power generation device is provided with: a duct (7) through the inside of which a low temperature fluid flows; a first power generation module (1) and a second power generation module (2) each internally provided with a thermoelectric power generation element and respectively making contact with outer surfaces of the duct (7) facing each other, so as to sandwich the duct (7); a first outer plate (3) and a second outer plate (4) respectively making contact with outer surfaces of the first and second power generation modules (1, 2) on the side opposite to the duct (7); and outside fins (5, 6) respectively provided on outer surfaces of the first and second outer plates (3, 4) on the side opposite to the respective power generation modules (1, 2) and making contact with a high temperature fluid. The first outer plate (3) and the second outer plate (4) have bent portions (3a, 4a), at both ends of the first and second outer plates (3, 4) in a direction orthogonal to a direction in which the low temperature fluid flows, which are welded in an elastically deformed state so that the first and second outer plates (3, 4) become closer to each other. The welding of the bent portions (3a, 4a) generates a stress of pressing the first power generation module (1) and the second power generation module (2) onto the duct (7).

Description

Thermoelectric generator and method for manufacturing the same Cross-reference of related applications

This application is based on Japanese Patent Application No. 2015-183254 filed on September 16, 2015 and Japanese Patent Application No. 2016-155818 filed on August 8, 2016. The description is incorporated.

The present disclosure relates to a thermoelectric power generation apparatus that performs thermoelectric power generation using a high-temperature fluid and a low-temperature fluid, and a manufacturing method thereof. In particular, the present invention relates to a thermoelectric power generation apparatus using vehicle exhaust and a method for manufacturing the same.

Conventionally, there is a thermoelectric generator described in Patent Document 1. In this apparatus, the power generation module, the low temperature side member, and the high temperature side member have different coefficients of thermal expansion during operation, and are concerned about the destruction of the power generation element in the power generation module due to the thermal strain generated thereby. Therefore, the power generation module, the low temperature side member, and the high temperature side member are not firmly fixed.

In addition, in order to enable heat transfer between the power generation module and the low temperature side member and the high temperature side member, use a fastening member such as a bolt while inserting a heat conduction member or the like between the members to improve the adhesion. Secured.

JP 2011-101460 A

According to the technique of the above-mentioned Patent Document 1, a fastening member such as a bolt for fastening is newly required, the number of parts is increased, and the material cost and manufacturing cost of the product are increased. In addition, such an increase in the number of parts increases the heat capacity that does not contribute to the heat exchange performance. As a result, a decrease in the amount of effective heat transfer in the initial operation of the power generation device and a decrease in the amount of power generation associated therewith occur, and sufficient performance cannot be obtained. Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

In view of such a problem, an object of the present disclosure is to provide a thermoelectric power generation device that suppresses a decrease in power generation performance and a manufacturing method thereof.

In order to achieve the above object, the thermoelectric generator according to the first aspect of the present disclosure includes a duct through which a low-temperature fluid flows and a thermoelectric generator in each of the ducts, and the ducts are arranged on the opposing outer surfaces of the duct. A first power generation module and a second power generation module that are in contact with each other so as to sandwich the first power generation module, and a first power generation module and a second power generation module that are in contact with the outer surfaces on the side opposite to the duct of the first power generation module and the second power generation module. And outer fins that are respectively provided on the outer surfaces of the first outer plate and the second outer plate on the side opposite to the power generation module and are in contact with the high-temperature fluid. The first outer plate and the second outer plate have a low temperature The first outer plate and the second outer plate in a direction perpendicular to the direction in which the fluid flows have bent portions that are welded in a state of being elastically deformed so as to approach each other. A power generation module, a second power generation module, It is characterized in that it generates a stress that presses the duct.

According to this, the outer plate has bent portions that are welded close to each other at both ends in a direction orthogonal to the direction in which the first fluid flows, and stress that presses the power generation module against the duct by welding of the bent portions. Is occurring. Accordingly, the adhesion between the power generation module, the first outer plate, the second outer plate, and the duct is improved, and the power generation performance is improved. Further, since a fastening member such as a bolt is not required to secure and maintain the adhesion, an increase in heat capacity due to a member that does not contribute to the heat exchange performance can be suppressed. Therefore, it is possible to provide a thermoelectric power generation apparatus that does not cause a decrease in the amount of effective heat transfer and a decrease in the amount of power generation in the initial stage of operation of the power generation apparatus and can obtain sufficient performance.

The thermoelectric power generation device according to the second aspect of the present disclosure includes a duct in which a low-temperature fluid flows, a thermoelectric generation element provided in each of the ducts, and the first and second outer surfaces facing each other so as to sandwich the duct. A first power generation module and a second power generation module; a first outer plate and a second outer plate that are in contact with the outer surfaces of the first power generation module and the second power generation module on the opposite side of the duct; Outer fins that are respectively provided on the outer surfaces of the outer plates on the side opposite to the power generation module and come into contact with the high-temperature fluid. The first outer plate and the second outer plate are orthogonal to the direction in which the low-temperature fluid flows. A bent portion that is welded in a state of being elastically deformed so that at least one of the first outer plate and the second outer plate approaches the other at both ends of the first outer plate and the second outer plate. By welding this bent part, the first power generation module and the first Characterized in that it generates a stress that presses the power generation module to the duct.

According to this thermoelectric generator, the outer plate is bent at both ends in a direction orthogonal to the direction in which the first fluid flows, and is welded close to the other outer plate in a state where at least one outer plate is elastically deformed. Part. A stress that presses the first power generation module and the second power generation module against the duct is generated by welding the bent portion. Therefore, the power generation performance is improved by improving the adhesion between each power generation module and the first outer plate and the second outer plate and the adhesion between each power generation module and the duct. Further, since a fastening member such as a bolt is not required to secure and maintain this adhesion, an increase in heat capacity due to a member that does not contribute to heat exchange performance can be suppressed. Therefore, it is possible to provide a thermoelectric power generation apparatus that does not cause a decrease in the amount of effective heat transfer and a decrease in the amount of power generation in the initial stage of operation of the power generation apparatus and can obtain sufficient performance.

A thermoelectric power generation device according to a third aspect of the present disclosure includes a duct through which a low-temperature fluid flows, a power generation module that is provided with a thermoelectric generation element therein, and that is in contact with an opposite outer surface of the duct, and an anti-duct side of the power generation module A first outer plate that contacts the outer surface, a second outer plate that directly or indirectly contacts the outer surface of the duct opposite to the power generation module side, and the first outer plate and the second outer plate, respectively. Outer fins that are respectively provided on the outer surface on the side opposite to the power generation module and come into contact with the high-temperature fluid, and the first outer plate and the second outer plate are arranged in a direction perpendicular to the direction in which the low-temperature fluid flows. At both ends of the plate and the second outer plate, there is a bent portion that is welded in a state of being elastically deformed so that at least one of the first outer plate and the second outer plate approaches the other. Press the power generation module against the duct by welding Characterized in that it has occurred to stress.

According to this thermoelectric generator, the outer plate is bent at both ends in a direction orthogonal to the direction in which the first fluid flows, and is welded close to the other outer plate in a state where at least one outer plate is elastically deformed. And a stress that presses the power generation module against the duct is generated by welding the bent portion. Therefore, the power generation performance is improved by improving the adhesion between the power generation module and the first outer plate and the second outer plate and the adhesion between the power generation module and the duct. Further, since a fastening member such as a bolt is not required to secure and maintain the adhesion, an increase in heat capacity due to a member that does not contribute to the heat exchange performance can be suppressed. Therefore, it is possible to provide a thermoelectric power generation apparatus that does not cause a decrease in the amount of effective heat transfer and a decrease in the amount of power generation in the initial stage of operation of the power generation apparatus and can obtain sufficient performance.

A method for manufacturing a thermoelectric generator according to a fourth aspect of the present disclosure includes a duct through which a low-temperature fluid flows, a power generation module in which a thermoelectric generator is provided, and a first outer plate and a second outer plate. The first outer plate and the second outer plate are opposed to each other, and each of the first outer plate and the second outer plate is in contact with the outside on the side opposite to the duct of the power generation module, A disposing step of disposing the power generation module and the duct between the first outer plate and the second outer plate so that the power generation module contacts each of the opposing outer surfaces of the duct; Pressurizing step to pressurize the second outer plate so as to approach each other and generate stress to press each of the first outer plate and the second outer plate against the power generation module; and the first outer plate in a state where the stress is generated And a welding step of welding the second outer plate.

According to this manufacturing method, the outer plate is welded so that both ends in a direction orthogonal to the direction in which the first fluid flows are close to each other, and a thermoelectric power generation device that generates stress that presses the power generation module against the duct by this welding is manufactured. it can. Accordingly, the adhesion of the power generation module, the first outer plate, the second outer plate, and the duct is improved, and the power generation performance is improved. Further, since a fastening member such as a bolt is not required to secure and maintain the adhesion, an increase in heat capacity due to a member that does not contribute to the heat exchange performance can be suppressed. Accordingly, it is possible to provide a method for manufacturing a thermoelectric power generator that does not cause a decrease in the amount of effective heat transfer and a decrease in the amount of power generation in the initial stage of operation of the power generator and can obtain sufficient performance.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing
It is a perspective view which shows a part of thermoelectric power generator in 1st Embodiment. It is a perspective view of the thermoelectric generator in a 1st embodiment. It is a top view of the thermoelectric power generator seen from the arrow Z3 direction of FIG. 1 in 1st Embodiment. It is the right view seen from the arrow Z4 direction of FIG. 3 in 1st Embodiment. It is a perspective view explaining the rigidity of the outside fin in a 1st embodiment. It is a partial enlarged view of the outside fin in a 1st embodiment. It is a top view of the thermoelectric power generator in 2nd Embodiment. It is a right view of the thermoelectric generator in 2nd Embodiment. It is a top view of the thermoelectric power generator in 3rd Embodiment. It is a right view of the thermoelectric generator in 3rd Embodiment. It is a perspective view in case the rod-shaped rigidity reinforcement member in 3rd Embodiment is a cross-sectional rectangle. It is a perspective view in case the rod-shaped rigidity reinforcement member in the modification of 3rd Embodiment is a rectangular tube type. It is a perspective view in case the rod-shaped rigidity reinforcement member in the modification of 3rd Embodiment is an angle type. It is a perspective view in case the rod-shaped rigidity reinforcement member in the modification of 3rd Embodiment is a channel type with a U-shaped cross section. It is a top view of the thermoelectric power generator in 4th Embodiment. It is a right view of the thermoelectric generator in 4th Embodiment. It is explanatory drawing which shows the external appearance of the electric power generation module used as the comparative example with respect to 4th Embodiment. It is explanatory drawing which shows the external appearance of the electric power generation module in which the accommodation groove | channel in 4th Embodiment was formed. It is explanatory drawing which shows the external appearance of the electric power generation module provided with the division part in the modification of 4th Embodiment. FIG. 5 is an explanatory diagram showing an example of a method for manufacturing a thermoelectric generator in the first to fourth embodiments. It is explanatory drawing which shows the state which pressurized and deform | transformed the 1st outer plate in the process of the manufacturing method shown in FIG. FIG. 6 is a characteristic diagram showing an example of characteristics common to the thermoelectric generators in the first to fourth embodiments. It is a perspective view of the thermoelectric generator of 5th Embodiment. It is a top view of the thermoelectric power generator of 5th Embodiment. It is the partial side view which showed the protrusion part of 5th Embodiment. It is the fragmentary sectional view which showed the protrusion part of 5th Embodiment. It is the partial side view which showed the protrusion part of 6th Embodiment. It is the fragmentary sectional view which showed the protrusion part of 6th Embodiment. It is a top view of the thermoelectric power generator of 7th Embodiment. It is the partial side view which showed the protrusion part of 7th Embodiment. It is the partial side view which showed the modification about the protrusion part of 7th Embodiment. It is a perspective view of the thermoelectric generator of 8th Embodiment. It is a perspective view of the thermoelectric power generator of 9th Embodiment.

Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where a part of the configuration is described in each form, the other forms described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.
(First embodiment)
Hereinafter, the first embodiment will be described in detail with reference to FIGS. 1 to 6. FIG. 1 is a partial cross-sectional configuration diagram of a thermoelectric generator 100. The first power generation module 1 and the second power generation module 2 are housed in a flat box-shaped airtight case to prevent oxidation of the elements. Therefore, although the power generation modules 1 and 2 can be seen only as plate-like boxes in appearance, a large number of P-type semiconductor elements and N-type semiconductor elements are alternately arranged inside an airtight case made of thin stainless steel. It is connected in a net shape. The power generation module generates power when the high temperature portion contacts one surface and the low temperature portion contacts the other surface.

One surface of each of the power generation modules 1 and 2 is in contact with the first outer plate 3 and the second outer plate 4 forming the high temperature part. The first outer plate 3 and the second outer plate 4 may be collectively referred to simply as the outer plates 3 and 4. The first outer plate 3 and the second outer plate 4 are bent so that both ends are welded to each other. The bent portions 3a and 4a which are the bent portions are welded to each other by seam welding or laser welding which is welded in a direction parallel to the direction in which the low-temperature fluid flows in the duct 7. By this welding, an internal space 30 surrounded by the first outer plate 3 and the second outer plate 4 is formed. In the internal space 30 surrounded by the first outer plate 3 and the second outer plate 4, the power generation modules 1, 2 and the duct 7 are accommodated. The duct 7 is made of aluminum or stainless steel, and a low-temperature fluid made of automobile engine cooling water flows through the duct 7. The duct 7 has flat outer surfaces.

Outer fins 5 and 6 are provided on the outer side (upper and lower sides in FIG. 1) of the first outer plate 3 and the second outer plate 4 on the side opposite to the power generation module. Exhaust of the automobile engine that becomes a high temperature fluid flows in contact with the outer fins 5 and 6. The inner surface which is the other surface of the power generation modules 1 and 2 is in contact with the outer surface of the duct 7 forming the low temperature part. The inside of the duct 7 is divided into a plurality of flow passages, and cooling water that becomes a low-temperature fluid flows in the flow passages.

In addition, although what was shown in FIG. 1 is the thermoelectric power generation apparatus 100 which consists of one electric power generation unit, you may laminate | stack a plurality of such electric power generation units. Also in this case, the high-temperature fluid flows in contact with the outer fins 5 and 6 positioned between the stacked power generation units.

The first outer plate 3 and the second outer plate 4 are pressurized as indicated by arrows Y11 to Y14 so that the bent portions 3a and 4a overlap each other during assembly. In this pressurized state, the bent portions 3a and 4a are welded to each other by seam welding or laser welding. Accordingly, the first outer plate 3 and the second outer plate 4 are subjected to a stress that sandwiches the power generation modules 1 and 2 to complete the product. As a result, the power generation modules 1 and 2 are easily brought into close contact with the first outer plate 3, the second outer plate 4 and the duct 7. That is, the pressure applied by the stress acts between the duct 7 and the power generation modules 1 and 2 and between the power generation modules 1 and 2 and the first outer plate 3 and the second outer plate 4, and the pressure contact portion therebetween. Is forming.

FIG. 2 is a perspective view of the entire thermoelectric generator 100. The thermoelectric generator 100 includes an outer fin 5, a first outer plate 3, a first power generation module 1, a duct 7, a second power generation module 2, a second outer plate 4, and an outer fin 6 from the upper side to the lower side in FIG. 2. It is the laminated body comprised. A low temperature fluid flows in the duct 7 as indicated by arrows Y21 and Y22. Inside the outer fins 5 and 6, the high temperature fluid flows as indicated by arrows Y21 and Y22 while contacting the outer fins 5 and 6, and the high temperature fluid and the outer fins 5 and 6 exchange heat.

FIG. 3 is a plan view of the thermoelectric generator 100 viewed from the direction of the arrow Z3 in FIG. FIG. 4 shows the right side as seen from the direction of arrow Z4 in FIG. The direction of arrow Y31 in FIG. 3 is the direction in which the high-temperature fluid flows. Further, the engine coolant that becomes a low temperature fluid flows orthogonally to the high temperature fluid as indicated by an arrow Y32 in FIG. The low-temperature fluid flows through the inside of a duct 7 having a plurality of divided flow paths installed at the center of FIG. The power generation modules 1 and 2 are installed on one surface side and the other surface side of the duct 7. The pair of power generation modules 1 and 2 sandwich the duct 7 on the inside, and the outside is sandwiched between the first outer plate 3 and the second outer plate 4. The width W4 between the outer fins 5 and 6 is 35 mm as an example.

FIG. 5 is a perspective view for explaining the rigidity of the outer fins 5 and 6. The outer fins 5 and 6 are easy to expand and contract in the direction of extending in a wave shape and have low rigidity. On the other hand, it is hard to expand and contract in the direction perpendicular to it and has high rigidity.

In FIG. 1, bending stress is applied to the first outer plate 3 and the second outer plate 4 due to the influence of the pressing force indicated by arrows Y11 to Y14. Therefore, rigidity that can withstand this bending stress is required. Therefore, it is desirable to increase the rigidity in the left-right direction orthogonal to the arrows Y11 and Y12 in FIG. 1, that is, the direction connecting the bent portions 3a and 4a. As can be seen from FIGS. 3 and 4, the direction connecting the bent portions 3a and 4a is the direction of the arrow Y31 through which the high-temperature fluid flows. Therefore, as shown in FIG. 5, the outer fins 5 and 6 have increased rigidity in the direction of the arrow Y31 through which the high-temperature fluid flows, and decreased rigidity in the direction perpendicular thereto.

FIG. 6 is a partially enlarged view of the outer fin 5. The outer fin 5 bent into a corrugated shape has a low rigidity in the wave traveling direction and a strong composition in the wave overlapping direction. By brazing such outer fins 5 to the first outer plate 3, the rigidity of the first outer plate 3 is also strengthened. As a result, a gap that hinders heat transfer is less likely to occur between the first outer plate 3, the second outer plate 4, and the power generation modules 1 and 2. In FIG. 6, as the outer fins 5 and 6, offset fins in which the positions of adjacent fins are separated by being slightly offset are employed.

It should be noted that a heat conducting member such as a graphite sheet may be sandwiched between pressure contact portions where the gap may occur. By providing such a heat conductive member in the pressure contact portion, the heat conductive member absorbs a certain level difference or unevenness that causes a gap in the pressure contact portion, and the thermal conductivity can be maintained.

The operation and effect of the first embodiment will be described. In the first embodiment, a duct 7 having a flat front and back outer surface through which a low-temperature fluid flows inside is contacted with the outer surface of the duct 7 so as to sandwich the duct 7, and a thermoelectric generator is provided inside. Modules 1 and 2 are provided. In addition, the first outer plate 3 and the second outer plate 4 are in contact with the outside of the power generation modules 1 and 2 on the side opposite to the duct. Further, outer fins 5 and 6 are joined to the outer sides of the first outer plate 3 and the second outer plate 4 on the side opposite to the power generation module.

The first outer plate 3 and the second outer plate 4 have bent portions 3a and 4a that are welded in an elastically deformed state so as to approach each other at both ends in a direction orthogonal to the direction in which the low-temperature fluid flows. A stress that presses the power generation modules 1 and 2 against the duct 7 is generated by welding the bent portions 3a and 4a.

The stress that presses the power generation modules 1 and 2 against the duct 7 is generated and maintained by welding the bent portions 3a and 4a. Therefore, the adhesiveness between the power generation modules 1, 2 and the first outer plate 3 and the second outer plate 4 and between the power generation modules 1, 2 and the duct 7 is improved, and the power generation performance is improved. Further, since welding is used to secure and maintain the adhesion, a fastening member such as a bolt is unnecessary. Therefore, the heat capacity that does not contribute to the heat exchange performance does not increase. As a result, a decrease in the amount of heat transfer and a decrease in the amount of power generation in the initial operation of the thermoelectric generator do not occur. Therefore, sufficient performance can be obtained.

In the first embodiment, the bent portions 3a and 4a are welded linearly by seam welding or laser welding in a pressurized state. Therefore, a stress that sandwiches the power generation modules 1 and 2 acts on the outer plates 3 and 4. As a result, the power generation modules 1 and 2 are in close contact with the outer plates 3 and 4 and the duct 7. The applied pressure acts between the duct 7 and the power generation modules 1 and 2 and between the power generation modules 1 and 2 and the outer plates 3 and 4, and a good pressure contact portion is formed between them.

In the first embodiment, as shown in FIG. 21, which will be described later, the first outer plate 3 and the second outer plate 4 are bent and elastic on the outer side of the end 3t or the end 3t of the power generation modules 1 and 2. It is deformed. According to this, while maintaining the flat pressure contact portion between the end portions 3t, the power generation module 1 with the reaction force that the elastically deformed first outer plate 3 and second outer plate 4 try to return to the original state, The adhesion between the second outer plate 3, the first outer plate 3, the second outer plate 4, and the duct 7 can be improved.

In the first embodiment, the welding of the bent portions 3a and 4a is seam welding or laser welding having a weld portion 34 that extends along the direction in which the low-temperature fluid flows. According to this, bending part 3a, 4a can be welded firmly. In addition, you may weld the end surface 3b of the bending part 3a.

In the first embodiment, an internal space 30 sandwiched between the first outer plate 3 and the second outer plate 4 is formed by welding the bent portions 3 a and 4 a, and the power generation modules 1 and 2 are included in the inner space 30. Stored. In the first embodiment, the high-temperature fluid flows in a direction orthogonal to the low-temperature fluid by stroking the outer fins 5 and 6. Accordingly, the hot fluid flows in the outer fins 5 and 6 in a direction intersecting the cold fluid. The outer fins 5 and 6 are configured to have a plurality of wave portions. As shown in FIG. 6, the plurality of wave portions have a wave traveling direction in parallel with the arrow Y61 direction in which the low-temperature fluid flows, and have a wave overlapping direction in parallel with the arrow Y62 direction in which the high-temperature fluid flows. Accordingly, in the plurality of wave portions, the traveling direction of the waves is parallel to the direction in which the cryogenic fluid flows. The plurality of wave portions may have the wave traveling direction intersecting the direction in which the low-temperature fluid flows.

According to this, the high-temperature fluid can easily flow between the waves, and the outer fins 5 and 6 can increase the rigidity in the direction in which the high-temperature fluid flows. As a result, the first outer plate 3 and the second outer plate 4 to which the outer fins 5 and 6 are joined can also increase the rigidity in the direction in which the high-temperature fluid flows. On the other hand, the first outer plate 3 and the second outer plate 4 have bent portions 3a and 4a that are welded close to each other at both ends in the direction in which the high-temperature fluid flows. A stress that presses the power generation modules 1 and 2 against the duct 7 is generated by welding the bent portions 3a and 4a. Therefore, the rigidity with respect to this stress can be increased by the outer fins 5 and 6, and the adhesion can be reliably maintained.
(Second Embodiment)
Next, a second embodiment will be described. In addition, about 2nd Embodiment or less, the same code | symbol as 1st Embodiment shows the same structure, Comprising: The description which precedes is used.

FIG. 7 is a plan view of a thermoelectric power generator showing a second embodiment. FIG. 8 shows the right side. As shown in FIG. 8, in the second embodiment, plate-like rigidity reinforcing members 8 and 9 are attached to the outer sides of the left and right outer fins on the side opposite to the outer plate. The material of the rigidity reinforcing members 8 and 9 is metal or ceramic. The plate-like rigidity reinforcing members 8 and 9 and the outer fins 5 and 6 are joined by bonding or brazing. As a result, the rigidity of the outer fins 5, 6, the first outer plate 3 and the second outer plate 4 can be enhanced. Particularly, as an outer fin, there is a great merit that it is possible to enhance the rigidity of the offset fin as shown in FIG. 6 where the positions of adjacent fins are divided with some offset. Although the offset fin itself is known, the heat exchange performance is excellent. The fin is not limited to the offset fin. It is also possible to use wave fins that are not offset.

The operational effects of the second embodiment will be described. According to the second embodiment, the plate-like rigidity reinforcing members 8 and 9 are joined to the outer fins 5 and 6 on the opposite sides of the first outer plate 3 and the second outer plate 4. In other words, the plate-like rigidity reinforcing members 8 and 9 are joined to the outer side of the outer fins 5 and 6 on the side opposite to the outer plate. According to this, the rigidity in the direction in which the high-temperature fluid flows in the first outer plate 3 and the second outer plate 4 can be increased. On the other hand, the first outer plate 3 and the second outer plate 4 have bent portions 3a and 4a that are welded close to each other at both ends in the direction in which the high-temperature fluid flows. And the stress which presses the electric power generation modules 1 and 2 against the duct 7, the 1st outer plate 3, and the 2nd outer plate 4 is generate | occur | produced by welding of this bending part 3a, 4a. The rigidity against the stress can be increased by the plate-like rigidity reinforcing members 8 and 9, and the adhesion can be reliably maintained.
(Third embodiment)
Next, a third embodiment will be described. A different part from above-described embodiment is demonstrated. 9 and 10, a total of eight rod-like shapes are mixed in the outer fins 5 and 6 positioned outside the first outer plate 3 and the second outer plate 4, that is, the outer fins 5 and 6 as an example. The rigidity reinforcing members 10 and 11 are inserted. The rigid reinforcing members 10 and 11 use a metal bar having a rectangular cross section as shown in FIG. 11, but a rectangular tube type as shown in FIG. 12, an angle type as shown in FIG. 13, and a cross section as shown in FIG. A U-shaped channel type or the like can be adopted. The direction in which the rod-shaped rigidity reinforcing members 10 and 11 extend is parallel to the direction in which the high-temperature fluid flows, and therefore the flow of the high-temperature fluid is rarely obstructed. The divided outer fins 5 and 6 are disposed between the rigidity reinforcing members 10 and 11. The rigidity reinforcing members 10 and 11 are brazed to the outer fins 5 and 6, the first outer plate 3, and the second outer plate 4.

The effect of the third embodiment will be described. According to the third embodiment, the plurality of rod-like rigidity reinforcing members 10 and 11 that are mixed with the outer fins 5 and 6 and extend in parallel with the direction in which the high-temperature fluid flows are the outer fins 5 and 6 and the first outer plate. 3 and the second outer plate 4.

According to this, the rigidity in the direction in which the high-temperature fluid flows can be increased. On the other hand, the first outer plate 3 and the second outer plate 4 have bent portions 3a and 4a that are welded close to each other at both ends in the direction in which the high-temperature fluid flows. A stress that presses the power generation modules 1 and 2 against the duct 7, the first outer plate 3, and the second outer plate 4 is generated by welding the bent portions 3a and 4a.
(Fourth embodiment)
Next, a fourth embodiment will be described. 9 and 10, the rod-like rigidity reinforcing members 10 and 11 are installed between the outer fins 5 and 6, but the installation area of the outer fins 5 and 6 is reduced. Considering this, in the fourth embodiment, as shown in FIGS. 15 and 16, the inner rigidity reinforcing members 10 r and 11 r are installed inside the outer fins 5 and 6. The inner rigidity reinforcing members 10 r and 11 r are joined to the first outer plate 3 and the second outer plate 4. The inner rigidity reinforcing members 10r and 11r are provided between the first outer plate 3 and the second outer plate 4 and the power generation modules 1 and 2, respectively. However, this causes the inner rigidity reinforcing members 10r and 11r to interfere with the first outer plate 3 and the second outer plate 4 or the power generation modules 1 and 2.

Therefore, a storage groove for storing at least part of the inner rigidity reinforcing members 10r and 11r may be formed in the first outer plate 3 and the second outer plate 4 or the power generation modules 1 and 2. In addition, by forming the power generation modules 1 and 2 with a plurality of modules provided at a predetermined interval, the dividing unit 13 can be formed in the power generation modules 1 and 2. In order to avoid interference between the inner rigidity reinforcing members 10r and 11r and the power generation modules 1 and 2, the dividing portion 13 can be used to accommodate at least a part of the inner rigidity reinforcing members 10r and 11r.

This will be explained below. In the first embodiment, the power generation modules 1 and 2 each having a rectangular box as shown in FIG. 17 are employed. In contrast, in the fourth embodiment, as shown in FIG. 18, the power generation modules 1 and 2 are provided with a storage groove 12 that stores a part of the inner rigidity reinforcing members 10 r and 11 r. As shown in FIG. 19, the power generation modules 1 and 2 are configured by a plurality of modules that are provided at predetermined intervals, which are the division units 13. A part of the inner rigidity reinforcing members 10r and 11r can be accommodated in the divided portion 13. Accordingly, it is possible to avoid the inner rigidity reinforcing members 10r and 11r from interfering with the first outer plate 3 and the second outer plate 4 or the power generation modules 1 and 2.

The operational effects of the fourth embodiment will be described. According to the fourth embodiment, a plurality of inner rigidity reinforcing members 10r, 11r extending in parallel with the direction in which the high-temperature fluid flows between the first outer plate 3, the second outer plate 4, and the power generation modules 1, 2. Are joined to the first outer plate 3 and the second outer plate 4. According to this, since the rigidity of the first outer plate 3 and the second outer plate 4 can be strengthened by the inner rigidity reinforcing members 10r and 11r, the rigidity against stress can be increased, and the adhesion can be reliably maintained. it can.

According to the fourth embodiment, the power generation modules 1 and 2 are provided with the storage grooves 12 or the divided portions 13 for storing the inner rigidity reinforcing members 10r and 11r. According to this, the inner rigidity reinforcing members 10r and 11r can be accommodated while avoiding interference between the first outer plate 3, the second outer plate 4, and the power generation modules 1 and 2.

Hereinafter, a method of manufacturing a power generation apparatus that is generally common to the first to fourth embodiments will be described using the first embodiment for convenience. As shown in FIG. 20, the first outer plate 3 and the second outer plate 4 are combined and installed between the receiving jig 21 and the pressing jig 22 of the pressing device. Then, pressure is applied to these jigs 21 and 22 as indicated by an arrow Y20 by pressing. As a result, the bent portions 3a and 4a are pressurized as indicated by arrows Y11 to Y14 so as to increase the overlapping portions. As shown in FIG. 21, the first outer plate 3 or the second outer plate 4 is bent and elastically deformed at the end portions 3t of the power generation modules 1 and 2, and the bent portions 3a and 4a are in a pressed state. They are welded together by a welder. Therefore, the first outer plate 3 and the second outer plate 4 are coupled together while a stress that sandwiches the power generation modules 1 and 2 is applied. As a result, the power generation modules 1 and 2 try to come into close contact with the first outer plate 3, the second outer plate 4 and the duct 7. Also, the arrows Y11 to Y14 indicating the applied pressure act between the duct 7 and the power generation modules 1 and 2 and between the power generation modules 1 and 2, the first outer plate 3, and the second outer plate 4, and are good pressure contact portions. Form. In addition, the manufacturing method of the said thermoelectric power generating apparatus is applicable also in the modification of embodiment.

Describes the effects of the manufacturing method. The method for manufacturing the thermoelectric generator includes a duct 7 in which a low-temperature fluid flows, a power generation module 1 and 2 that are in contact with the duct 7, and a first outer plate 3 that is in contact with the outside of the power generation modules 1 and 2, respectively. And the second outer plate 4 are applied to a thermoelectric generator.

In manufacturing, first, the first outer plate 3 and the second outer plate 4 are opposed to each other, and the power generation modules 1 and 2 and the duct 7 are disposed between the first outer plate 3 and the second outer plate 4. A disposing step. Next, a pressurizing step is performed in which the first outer plate 3 and the second outer plate 4 are pressed so as to approach each other, and a stress is generated to press the first outer plate 3 and the second outer plate 4 against the power generation modules 1 and 2. Have. Moreover, it has the welding process of welding the 1st outer plate 3 and the 2nd outer plate 4 and maintaining a pressurization state, generating this stress.

According to this, since the first outer plate 3 and the second outer plate 4 are welded while generating the stress that presses the first outer plate 3 and the second outer plate 4 against the power generation modules 1 and 2, the power generation module 1. 2 and the outer plates 3, 4 and the duct 7 are improved in adhesion. As a result, the power generation performance is improved. Further, since a fastening member such as a bolt for securing and maintaining the adhesion is not necessary, the heat capacity that does not contribute to the heat exchange performance does not increase. As a result, the thermoelectric generator does not cause a decrease in the amount of heat transfer and a decrease in the amount of power generation in the initial stage of operation, and sufficient performance can be obtained.

This will be described below with reference to FIG. In FIG. 22, the horizontal axis indicates the passage of time T, and the vertical axis indicates the flow rate Q of the high-temperature gas composed of exhaust gas and the heat exchange amount, and thus the power generation amount W. The hot gas starts to flow into the outer fins 5 and 6 at time T1. As a result, power generation is started, but in the characteristic C1 of the embodiment, the power generation amount W rises quickly. On the other hand, in the characteristic C2 of the device in the development process without stress as a comparative example, since the adhesion is poor, the rise of the power generation amount W is relatively slow. The area of the difference region R12 between the characteristics C1 and the characteristics C2 indicates the performance improvement by the thermoelectric generator according to the embodiment.
(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIGS. About 5th Embodiment, the same code | symbol as above-mentioned embodiment shows the same structure, Comprising: The description which precedes is used.

As shown in the figure, the first outer plate 3 has ribs 3c on the surface on the duct 7 side opposite to the outer fins 5. The rib 3c is a projecting deformed portion that is deformed so as to project the surface of the first outer plate 3 on the duct 7 side. The rib 3 c is a reinforcing part that can increase the rigidity of the first outer plate 3. The rib 3c can be manufactured by pressing the first outer plate 3 from the surface on the outer fin 5 side toward the duct 7 to deform the surface on the duct 7 side so as to protrude. As shown in FIGS. 23 and 24, a plurality of ribs 3 c are provided on the first outer plate 3. Each rib 3c is provided so as to extend over the entire length of the first outer plate 3 in the direction in which the high-temperature fluid flows. Each rib 3c is provided to extend so as to connect the bent portion 3a and the bent portion 3a at both ends in the first outer plate 3. The plurality of ribs 3 c are provided at intervals over the entire length of the outer fin 5 in the direction in which the low-temperature fluid flows in the first outer plate 3.

25, the rib 3c has at least a portion that overlaps with the end of the outer fin 5. As shown in FIG. According to this configuration, due to the overlap structure of the fins and the ribs 3c, when the first outer plate 3 is pressed during manufacturing, stress during pressing can be dispersed. Therefore, in the vicinity of the end portion of the outer fin 5, it is possible to avoid a situation in which the rigidity of the first outer plate 3 is greatly reduced, and it is possible to improve the durability of the thermoelectric generator 100.

Furthermore, the rib 3c is provided from the part which overlaps with the edge part of the outer side fin 5 to the bending part 3a. According to this configuration, there is an effect of stress dispersion when the springback occurs after the first outer plate 3 and the second outer plate 4 are welded. Therefore, a situation in which the rigidity of the first outer plate 3 is greatly reduced can be avoided, and the durability of the thermoelectric generator 100 can be improved.

As shown in FIG. 26, the rib 3 c is provided at a position avoiding the joint portion between the first outer plate 4 and the outer fin 5. According to this configuration, it is possible to secure a joint portion in the outer fin 5 that is joined to the first outer plate 3. Therefore, since the area which is not brazed in the junction part of the 1st outer plate 4 and the outer side fin 5 can be suppressed, the rigidity of the 1st outer plate 3 can be ensured. The above description relating to the rib 3 c in the first outer plate 3 is the same for the rib 4 c in the second outer plate 4. In the above description, the first outer plate 3 can be replaced with the second outer plate 4, and the rib 3c can be replaced with the rib 4c.
(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIGS. About 6th Embodiment, the same code | symbol as above-mentioned embodiment shows the same structure, Comprising: The description which precedes is used.

The sixth embodiment is different from the rib 3c and the rib 4c in the fifth embodiment in a block member 103c and a block member 104c. The block-shaped member 103 c is a member provided integrally on the surface of the first outer plate 3 on the duct 7 side. The block-shaped member 103c is a separate component from the first outer plate 3 before joining. The block-like member 103c is joined to the first outer plate 3 by brazing, welding, or the like, and is provided integrally with the first outer plate 3. The block-shaped member 103 c is a reinforcing part that can increase the rigidity of the first outer plate 3.

27, the block-shaped member 103c has a portion that overlaps at least the end portion of the outer fin 5. As shown in FIG. According to this configuration, due to the overlapping structure of the fins and the block-shaped member 103c, stress during pressurization can be dispersed when the first outer plate 3 is pressed during manufacturing. Therefore, in the vicinity of the end portion of the outer fin 5, it is possible to avoid a situation in which the rigidity of the first outer plate 3 is greatly reduced, and it is possible to improve the durability of the thermoelectric generator 100. As shown in FIG. 28, the block-like member 103 c is provided at a position that avoids the joint between the first outer plate 4 and the outer fin 5.

The block-like member 103c is provided from the portion overlapping the end of the outer fin 5 to the bent portion 3a. According to this configuration, there is an effect of stress dispersion when the springback occurs after the first outer plate 3 and the second outer plate 4 are welded. Therefore, a situation in which the rigidity of the first outer plate 3 is greatly reduced can be avoided, and the durability of the thermoelectric generator 100 can be improved.

Further, the block-shaped member 104c has the same configuration as the block-shaped member 103c described in the sixth embodiment, and exhibits the same operational effects as described above. In this case, the first outer plate 3 can be replaced with the second outer plate 4 in the operational effects described in the sixth embodiment.
(Seventh embodiment)
Next, a seventh embodiment will be described with reference to FIGS. About 7th Embodiment, the same code | symbol as above-mentioned embodiment shows the same structure, Comprising: The description which precedes is used.

7th Embodiment is a modification about the said reinforcement part. As shown in FIG.29 and FIG.30, the 1st outer plate 3 has the rigidity reduction part 203c. The rigidity reduction portion 203 c is a portion that is provided adjacent to the outer fin 5 and has lower rigidity than the outer fin 5. The rigidity lowering portion 203c is a portion having a simpler structure and a thinner plate thickness than the outer fins 5. For example, the rigidity reduction portion 203 c can be formed of a thin plate-like fin that protrudes vertically from the first outer plate 3.

The rigidity reduction portion 203c can be constituted by a protruding piece whose protruding height gradually decreases as the distance from the outer fin 5 increases. The protruding piece 3 c 1 is adjacent to the outer fin 5 and is closest to the outermost fin 5. The protruding piece 3 c 2 is adjacent to the protruding piece 3 c 1, has a protruding height lower than that of the protruding piece 3 c 1, and is separated from the outer fin 5. The protruding piece 3c3 is adjacent to the protruding piece 3c2, has a protruding height lower than that of the protruding piece 3c2, and is separated from the outer fin 5. The above description relating to the rigidity reduction portion 203c in the first outer plate 3 is the same for the rigidity reduction portion 204c in the second outer plate 4. In the above description, the first outer plate 3 is the second outer plate 4, the reduced rigidity portion 203c is the reduced rigidity portion 204c, the protruding pieces 3c1, the protruding pieces 3c2, and the protruding pieces 3c3 are the protruding pieces 4c1, the protruding pieces 4c2, and the protruding portions. Each of the pieces can be replaced with the piece 4c3.

Moreover, the rigidity reduction part 203c can be replaced with a rigidity reduction part 303c shown in FIG. Even if the rigidity reduction part 303c leaves | separates from the outer side fin 5, the protrusion height is set the same. The above description relating to the rigidity reduction portion 303 c in the first outer plate 3 is the same for the rigidity reduction portion 304 c in the second outer plate 4. In the above description, the first outer plate 3 can be replaced with the second outer plate 4, and the reduced rigidity portion 303c can be replaced with the reduced rigidity portion 304c.

The rigidity reduction portions 203 c, 204 c, 303 c, and 403 c have a portion that overlaps at least the end portion of the outer fin 5. According to this configuration, due to the overlap structure of the fins and the respective rigidity-decreasing portions, stress at the time of pressurization can be dispersed when the outer plate is pressed at the time of manufacture. Therefore, it is possible to avoid a situation in which the rigidity of the outer plate greatly decreases in the vicinity of the end portion of the outer fin 5, and to improve the durability of the thermoelectric generator 100.
(Eighth embodiment)
Next, an eighth embodiment will be described with reference to FIG. About 8th Embodiment, the same code | symbol as above-mentioned embodiment shows the same structure, Comprising: The description which precedes is used.

The eighth embodiment is different from the thermoelectric generator 100 of the first embodiment in that a power generation module is provided only on one side of the duct 7.

A thermoelectric power generation apparatus 100 according to the eighth embodiment includes a duct 7 and a first power generation module 1 that is in contact with the outer surface of the duct 7 that faces each other. The thermoelectric generator 100 further includes a first outer plate 3 that is in contact with an outer surface on the side opposite to the duct 7 of the first power generation module 1 and an outer surface on the opposite side of the duct 7 from the first power generation module 1 side. A second outer plate 4 that is indirectly contacted.

In the example shown in FIG. 32, the duct 7 and the second outer plate 4 are in contact with each other through the heat conductive member 102. That is, the duct 7 and the second outer plate 4 are in indirect contact with each other because the member is interposed therebetween. Moreover, the thermoelectric generator 100 of 8th Embodiment can also be set as the structure which is not provided with the heat conductive member 102, and the duct 7 and the 2nd outer plate | plate 4 contact directly. Also in the thermoelectric generator 100 of 8th Embodiment, there can exist an effect similar to each above-mentioned embodiment.
(Ninth embodiment)
Next, a ninth embodiment will be described with reference to FIG. About 9th Embodiment, the same code | symbol as above-mentioned embodiment shows the same structure, Comprising: The description which precedes is used.

9th Embodiment is a bending part in the state which elastically deformed only one outer plate among the 1st outer plates 3 and the 2nd outer plates 4 with respect to the thermoelectric generator 100 of 1st Embodiment. The difference is that it is an apparatus for welding.

As shown in FIG. 33, the first outer plate 3 and the second outer plate 4 are arranged at both ends of the first outer plate 43 and the second outer plate 4 in a direction orthogonal to the direction in which the low-temperature fluid flows. It has the bending parts 3a and 4a welded in the state elastically deformed so that at least one of the 2nd outer plates 4 may approach with respect to the other. A stress that presses the first power generation module 1 and the second power generation module 2 against the duct 7 is generated by welding the bent portion. The thermoelectric power generation device 100 of the ninth embodiment can achieve the same effects as those of the above-described embodiments.

Although the embodiment has been described as described above, the present disclosure is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present disclosure. The structure of the said embodiment is an illustration to the last, Comprising: The range of this indication is not limited to the range of these description. The scope of the present disclosure is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope. A modification of the above embodiment will be described.

In the first embodiment, as shown in FIG. 1, the first outer plate 3 is made smaller than the second outer plate 4, and the first outer plate 3 is put on the second outer plate 4. The first outer plate 3 and the second outer plate 4 may have the same size and may be assembled with their positions shifted from each other.

In the first embodiment, the first outer plate 3 and the second outer plate 4 are welded to seal the inner space 30 surrounded by the first outer plate 3 and the second outer plate 4. However, the sealing may not be performed completely, and the high temperature fluid that is a high temperature gas may not be adversely affected on the power generation modules 1 and 2 in the internal space 30. That is, spot welding at multiple points may be used.

In the first embodiment, the power generation modules 1 and 2 are covered with an airtight case made of stainless steel, and a large number of P-type semiconductor elements and N-type semiconductor elements are alternately connected in a net-like manner inside the airtight case. Has been. However, even if there is no airtight case and a large number of P-type semiconductor elements and N-type semiconductor elements are exposed inside the internal space 30 surrounded by the first outer plate 3 and the second outer plate 4. Good. In other words, the airtight case is not essential. In this case, the internal space 30 can be sealed with a cover or the like.

In the first embodiment, the first outer plate 3 and the second outer plate 4 are bent after being elastically deformed so as to approach each other at both ends in a direction orthogonal to the direction in which the low-temperature fluid flows. 3a, 4a. And the stress which presses the electric power generation modules 1 and 2 against the duct 7 grade | etc., Is generate | occur | produced by the coupling | bonding of these bending parts 3a and 4a. Although the joining surfaces of the bent portions 3a and 4a are flat, a serrated projection shape that does not return after engaging with each other or a concavo-convex shape constituting a labyrinth shape may be processed into the joining surface.

In the first embodiment, the portions of the first outer plate 3 and the second outer plate 4 that are in contact with the power generation modules 1 and 2 are flat surfaces, but may have any curved shape. In short, a uniform stress should be applied to the power generation modules 1 and 2 as much as possible. Further, an inclusion such as a graphite sheet excellent in heat conduction may be sandwiched between the first outer plate 3 and the first power generation module 1 and between the second outer plate 4 and the second power generation module 2. The thickness of the graphite sheet may not be uniform. In short, it is only necessary to apply a uniform stress as much as possible to the power generation module so that uniform heat conduction is achieved.

The duct 7 may be provided with a low-temperature fin for exchanging heat with a low-temperature fluid. In the first embodiment, the flow path of the low-temperature fluid in the duct 7 is divided, but the division is not essential. Further, the low-temperature fin may be formed integrally with the duct 7. In this case, the low-temperature fin may be a hook-shaped or uneven fin protruding from the inner wall surface of the duct 7.

In the first embodiment, the outer fins 5 and 6 made of stainless steel or aluminum are joined to the outer sides of the outer plates 3 and 4 made of an iron plate or a stainless steel plate by brazing or the like. 4 may be integrally formed continuously. In this case, the outer fins 5 and 6 may be hook-shaped fins that protrude or protrude from the surface of the outer plates 3 and 4.

When the thermoelectric power generation apparatus 100 shown in the first embodiment is used as one unit and a plurality of units are stacked to constitute the entire thermoelectric power generation apparatus, each unit is inserted into a frame that holds the unit. Then, the high-temperature fluid flows into the outer fins 5 and 6 between the units, and the low-temperature fluid is divided into the ducts 7.

Although the example of the exhaust of the automobile engine as the high-temperature fluid and the example of the engine cooling water as the low-temperature fluid are shown as the thermoelectric generator, the high-temperature gas of other industrial boilers may be used. Can be used as

Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, as well as other combinations and forms including only one element, more or less, are within the scope and spirit of the present disclosure.

Claims (20)

1. A duct (7) through which a cryogenic fluid flows;
   The first power generation module (1) and the second power generation module (2) are provided with thermoelectric power generation elements in each of them, and are in contact with the opposing outer surfaces of the duct (7) so as to sandwich the duct (7), respectively. When,
   A first outer plate (3) and a second outer plate (4), which are in contact with outer surfaces of the first power generation module (1) and the second power generation module (2) on the side opposite to the duct (7), respectively; ,
   Outer fins (5, 6) provided on the outer surfaces of the first outer plate (3) and the second outer plate (4) on the side opposite to the power generation module (1, 2), respectively, and in contact with the high temperature fluid; With
   The first outer plate (3) and the second outer plate (4) are disposed at both ends of the first outer plate (3) and the second outer plate (4) in a direction orthogonal to the direction in which the low-temperature fluid flows. Having bent portions (3a, 4a) welded in an elastically deformed state so as to approach each other;
   The thermoelectric power is characterized in that stress that presses the first power generation module (1) and the second power generation module (2) against the duct (7) is generated by welding of the bent portions (3a, 4a). Power generation device.
2. The first outer plate (3) and the second outer plate (4) are at the ends (3t) of the first power generation module (1) and the second power generation module (2) or the ends. The thermoelectric generator according to claim 1, wherein the thermoelectric generator is bent and elastically deformed outside the portion (3t).
3. The thermoelectric generator according to claim 1 or 2, wherein welding of the bent portions (3a, 4a) is seam welding or laser welding welded along a direction in which the low-temperature fluid flows.
4. An inner space (30) sandwiched between the first outer plate (3) and the second outer plate (4) is formed by welding the bent portions (3a, 4a), and the inner space (30) The thermoelectric power generator according to any one of claims 1 to 3, wherein the first power generation module (1) and the second power generation module (2) are accommodated therein.
5. The outer fins (5, 6) are configured to have a plurality of wave portions, the hot fluid flows through the outer fins (5, 6) in a direction intersecting the cold fluid, and the plurality of waves. 5. The thermoelectric generator according to claim 1, wherein the wave traveling direction is parallel to or intersects with a direction in which the cryogenic fluid flows.
6. Plate-shaped rigidity reinforcing members (8, 9) are joined to the outer fins (5, 6) on the opposite sides of the first outer plate (3) and the second outer plate (4). The thermoelectric power generator according to any one of claims 1 to 5, wherein the thermoelectric generator is provided.
7. Between the outer fins (5, 6) and the outer fins (5, 6), a rod-like rigidity reinforcing member (10, 11) extending in parallel with the flowing direction of the high-temperature fluid is provided.
   The rod-shaped rigidity reinforcing member (10, 11) is joined to the outer fin (5, 6) and the first outer plate (3) or the second outer plate (4). Item 6. The thermoelectric generator according to any one of Items 1 to 5.
8. The high temperature is sandwiched between the first outer plate (3) and the first power generation module (1) and between the second outer plate (4) and the second power generation module (2). A plurality of inner rigidity reinforcing members (10r, 11r) extending in parallel with the fluid flow direction;
   The inner rigidity reinforcing member (10r, 11r) is provided by being joined to the first outer plate (3) or the second outer plate (4). The thermoelectric generator according to one item.
9. The first power generation module (1) and the second power generation module (2) include a storage groove (12) for storing at least a part of the inner rigidity reinforcing member (10r, 11r). The thermoelectric generator according to claim 8.
10. Each of the first power generation module (1) and the second power generation module (2) is constituted by a plurality of power generation modules provided at intervals (13),
    The thermoelectric generator according to claim 8, wherein at least a part of the inner rigidity reinforcing member (10r, 11r) is accommodated in the gap (13).
11. A duct (7) through which a cryogenic fluid flows;
    The first power generation module (1) and the second power generation module (2) are provided with thermoelectric power generation elements in each of them, and are in contact with the opposing outer surfaces of the duct (7) so as to sandwich the duct (7), respectively. When,
    A first outer plate (3) and a second outer plate (4) that are in contact with outer surfaces of the first power generation module (1) and the second power generation module (2) on the side opposite to the duct (7);
    Outer fins (5, 6) provided on the outer surfaces of the first outer plate (3) and the second outer plate (4) on the side opposite to the power generation module (1, 2) and in contact with the high temperature fluid. And comprising
    The first outer plate (3) and the second outer plate (4) are disposed at both ends of the first outer plate (3) and the second outer plate (4) in a direction orthogonal to the direction in which the low-temperature fluid flows. A bent portion (3a, 4a) welded in a state where at least one of the first outer plate (3) and the second outer plate (4) is elastically deformed so as to approach the other,
    The thermoelectric power is characterized in that stress that presses the first power generation module (1) and the second power generation module (2) against the duct (7) is generated by welding of the bent portions (3a, 4a). Power generation device.
12. A duct (7) through which a cryogenic fluid flows;
    A power generation module (1) provided with a thermoelectric generation element therein and in contact with the opposing outer surface of the duct (7);
    A first outer plate (3) in contact with the outer surface of the power generation module (1) on the side opposite to the duct (7);
    A second outer plate (4) in direct or indirect contact with the outer surface of the duct (7) opposite to the power generation module (1) side;
    Outer fins (5, 6) provided on the outer surfaces of the first outer plate (3) and the second outer plate (4) on the side opposite to the power generation module (1) and in contact with the high-temperature fluid; With
    The first outer plate (3) and the second outer plate (4) are disposed at both ends of the first outer plate (3) and the second outer plate (4) in a direction orthogonal to the direction in which the low-temperature fluid flows. A bent portion (3a, 4a) welded in a state where at least one of the first outer plate (3) and the second outer plate (4) is elastically deformed so as to approach the other,
    The thermoelectric power generator characterized by generating the stress which presses the said power generation module (1) against the said duct (7) by welding of this bending part (3a, 4a).
13. The first outer plate (3) and the second outer plate (4) are provided with reinforcing portions (3c, 4c; 103c) on the surface on the duct (7) side opposite to the outer fins (5, 6). 104c; 203c, 204c; 303c, 304c)
    The said reinforcement part (3c, 4c; 103c, 104c; 203c, 204c; 303c, 304c) has at least the part which overlaps with the edge part of the said outer fin (5,6), The Claim 1 thru | or 3 characterized by the above-mentioned. The thermoelectric power generator according to any one of 12 above.
14. The reinforcing portion (3c, 4c) is a protruding deformation portion (deformed so as to protrude on the duct (7) side surface of each of the first outer plate (3) and the second outer plate (4). The thermoelectric generator according to claim 13, which is 3c, 4c).
15. The reinforcing portion (103c, 104c) is a block-shaped member (103c, 104c) provided integrally on the surface of the first outer plate (3) and the second outer plate (4) on the duct (7) side. The thermoelectric generator according to claim 13, which is 104c).
16. The reinforcing portions (203c, 204c; 303c, 304c) are provided adjacent to the outer fins (5, 6) and have a lower rigidity than the outer fins (5, 6) (203c, 204c; 303c, 304c).
17. The said projecting deformation part (3c, 4c) is provided from the part which overlaps with the edge part of the said outer side fin (5, 6) to the said bending part (3a, 4a), It is characterized by the above-mentioned. Thermoelectric generator.
18. The said block-shaped member (103c, 104c) is provided from the part which overlaps with the edge part of the said outer side fin (5, 6) to the said bending part (3a, 4a), It is characterized by the above-mentioned. Thermoelectric generator.
19. The projecting deformable portions (3c, 4c) are provided at positions avoiding joint portions between the first outer plate (3) and the second outer plate (4) and the outer fins (5, 6). The thermoelectric power generator according to claim 14, wherein
20. A thermoelectric device comprising: a duct (7) through which a low-temperature fluid flows; a power generation module (1, 2) provided with a thermoelectric generation element; and a first outer plate (3) and a second outer plate (4). In the method of manufacturing the power generation device,
    The first outer plate (3) and the second outer plate (4) are opposed to each other, and the first outer plate (3) is disposed outside the power generation module (1, 2) on the side opposite to the duct (7). And the second outer plate (4) are in contact with each other, and the power generation module (1, 2) is in contact with each of the opposing outer surfaces of the duct (7). And an arrangement step of arranging the power generation modules (1, 2) and the duct (7) between the second outer plate (4),
    The first outer plate (3) and the second outer plate (4) are pressurized so as to approach each other, and the first outer plate (3) and the second outer plate (4) are respectively connected to the power generation module. A pressurizing step for generating a stress to be pressed against (1, 2);
    A welding step of welding the first outer plate (3) and the second outer plate (4) in a state where the stress is generated;
    A method for manufacturing a thermoelectric generator, comprising:

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