JP2015173521A - Thermoelectric power generation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce steps for adjusting the facial pressure of a thermoelectric element.SOLUTION: In a state that a thermoelectric element 4 is held between a first pipe 2 and a second pipe 3a and a thermoelectric element 4 is held between the first pipe 2 and a second pipe 3b, the first pipe 2, two second pipes 3a, 3b and two thermoelectric elements 4 are surrounded by a pair of enclosures 5,6. A leaf spring 8 provided between a recess part 5c of the enclosure 5 and the second pipe 3a, energizes the second pipe 3a against the thermoelectric element 4.

Description

  The present invention relates to a thermoelectric power generation unit that recovers electrical energy from engine exhaust gas.

  In a thermoelectric power generation unit that recovers electrical energy from the high-temperature exhaust gas of an engine, heat from the exhaust gas is received on one side of the thermoelectric element, and the other side of the thermoelectric element is cooled to create a temperature difference on both sides of the thermoelectric element. It is generated and an electromotive force is generated.

  However, in a working machine such as a hydraulic excavator, the temperature of the exhaust gas of the engine varies depending on the fuel load. If an excessive surface pressure is applied to the thermoelectric element due to thermal expansion of the exhaust gas passage, the thermoelectric element may be damaged.

  Further, in a working machine or the like, an excessive surface pressure is applied to the thermoelectric element due to vibration of the vehicle or the engine, and the thermoelectric element may be damaged.

  Therefore, Patent Document 1 discloses a thermoelectric unit that prevents the thermoelectric element from being damaged by vibration or thermal expansion of the exhaust passage. In this thermoelectric unit, the surface pressure is adjusted by providing a surface pressure adjusting mechanism for adjusting the surface pressure that presses the thermoelectric element against the heat receiving body in the fixing mechanism that presses and fixes the thermoelectric element against the heat receiving body.

JP 2010-275976 A

  However, in the thermoelectric unit of Patent Document 1, the surface pressure is adjusted by a plurality of coil springs provided along the flow direction of the exhaust gas. Since the amount that can be tightened at one time is very small, this coil spring takes a lot of man-hours. For this reason, the thermoelectric element may be displaced from a predetermined position while the plurality of coil springs are being tightened little by little so that an uneven load is not applied to the thermoelectric element. In particular, when grease for promoting heat transfer is applied to the thermoelectric element, the thermoelectric element becomes slippery, so that the thermoelectric element is easily displaced from a predetermined position. If the deviation of the thermoelectric element is large, the power generation performance is deteriorated or the thermoelectric element is sometimes damaged.

  Further, when the thermoelectric unit is increased in size, the number of thermoelectric elements increases and the number of coil springs increases. It takes too much man-hours to tighten these coil springs one by one while preventing the thermoelectric element from being subjected to an unbalanced load.

  The objective of this invention is providing the thermoelectric power generation unit which can reduce the man-hour concerning adjustment of the surface pressure of a thermoelectric element.

  The present invention is provided with a first pipe having a rectangular cross section filled with a first medium and a second medium provided in parallel with the first pipe and having a temperature different from that of the first medium. A second pipe having a rectangular cross section, a thermoelectric element sandwiched between the first pipe and the second pipe, and a sandwiching direction in which the first pipe and the second pipe sandwich the thermoelectric element. A pair of plate members sandwiching the first pipe and the second pipe, a connecting member for connecting the plate members, the second pipe, and the plate member adjacent thereto. And urging means for urging the second pipe toward the thermoelectric element.

  According to the present invention, the second pipe is biased toward the thermoelectric element by the biasing means provided between the second pipe and the plate member adjacent to the second pipe. Since this urging means is provided between the second pipe and the plate member, once incorporated, the urging means continues to urge the second pipe toward the thermoelectric element with the set urging force. If the urging force of the urging means is designed in consideration of the thermal expansion of the pipe filled with the high temperature medium, it is not necessary to adjust the surface pressure of the thermoelectric element after assembling the unit. Therefore, the man-hour concerning adjustment of the surface pressure of a thermoelectric element can be reduced.

It is a perspective view of the rear part of a working machine. It is a permeation | transmission perspective view of a part of thermoelectric power generation unit. It is AA sectional drawing of FIG. It is a perspective view of a leaf | plate spring. It is the permeation | transmission perspective view which looked at FIG. 2 from E direction. It is an enlarged view of the principal part F of FIG. It is GG sectional drawing of FIG. It is AA sectional drawing of FIG. It is AA sectional drawing of FIG. It is AA sectional drawing of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Work machine configuration)
The thermoelectric power generation unit 1 according to the embodiment of the present invention is provided in the work machine 20. The work machine 20 is, for example, a hydraulic excavator. As shown in FIG. 1, which is a rear perspective view, the work machine 20 includes an upper swing body 21 that is mounted so as to be swingable with respect to a lower traveling body (not shown). A counterweight 22 that is a weight is provided at the rear of the upper swing body 21. The front side of the counterweight 22 is an engine room 23 in which an engine and the like are mounted. The thermoelectric power generation unit 1 of the present embodiment is provided above the engine room 23 and collects electric energy from engine exhaust gas.

(Configuration of thermoelectric generator unit)
As shown in FIG. 2, which is a partially transparent perspective view of the thermoelectric power generation unit 1, the thermoelectric power generation unit 1 includes a first pipe 2 having a rectangular cross section filled with a high-temperature fluid (first medium), a first pipe 2 And a second pipe 3 having a rectangular cross section filled with a low temperature fluid (second medium) having a temperature different from that of the high temperature fluid. In the present embodiment, the second pipe 3 is provided on each side of the first pipe 2. That is, the 2nd piping 3a is provided in the back side in the figure of the 1st piping 2, and the 2nd piping 3b is provided in the near side in the figure of the 1st piping 2. FIG. In the present embodiment, the high-temperature fluid is exhaust gas of several hundred degrees, but is not limited thereto, and may be air, gas, steam, hot water (such as waste water), or the like. In the present embodiment, the low-temperature fluid is cooling water at about 40 ° C., but is not limited thereto, and may be a fluid such as air, cooling oil, refrigerant, liquefied gas, or a solid.

  An inflow pipe 3c and an outflow pipe 3d are connected to the second pipe 3 respectively. The cooling water flowing into the second pipe 3 through the inflow pipe 3c flows through the second pipe 3, and is discharged from the second pipe 3 through the outflow pipe 3d. The cooling water discharged from the second pipe 3 is cooled and sent to the second pipe 3 again.

  As shown in FIG. 3, which is an AA cross-sectional view of FIG. 2, the thermoelectric power generation unit 1 has a thermoelectric element 4 sandwiched between a first pipe 2 and a second pipe 3. The thermoelectric element 4 has an energization portion 4a that energizes the outside, and generates an electromotive force due to a temperature difference between both surfaces. The thermoelectric element 4 is provided between the second pipe 3a and the first pipe 2 on the left side in the figure, and between the second pipe 3b and the first pipe 2 on the right side in the figure. . The side surfaces of the first pipe 2 and the second pipe 3 sandwiching the thermoelectric element 4 are in contact with the entire surface of the thermoelectric element 4.

  In addition, the inside of the 1st piping 2 is divided | segmented into the some flow path so that the contact area with a high temperature fluid may increase. Thereby, the heat of the high-temperature fluid flowing through the first pipe 2 can be efficiently transmitted to one surface of the thermoelectric element 4.

  Further, the thermoelectric power generation unit 1 includes a second pipe 3a, a first pipe 2, and a second pipe 3b from the sandwiching direction B in which the first pipe 2 and the second pipe 3 sandwich the thermoelectric element 4. A pair of casings 5 and 6 are sandwiched. Each of the pair of housings 5 and 6 is a rigid body.

  The housing 5 includes a plate portion (plate member) 5a and a pair of connecting portions (connecting members) 5b. The plate portion 5 a is provided with a recess 5 c along the longitudinal direction C of the second pipe 3. The second pipe 3a on the left side in the drawing adjacent to the plate portion 5a is fitted in the recess 5c. For this reason, while being easy to assemble, the vibration of the 2nd piping 3a is suppressed in the width direction D of the 2nd piping 3a.

  The housing (plate member) 6 is provided with a recess 6 a along the longitudinal direction C of the second pipe 3. The second pipe 3b on the right side in the figure adjacent to the housing 6 is fitted in the recess 6a. For this reason, it becomes easy to assemble and vibration of the second pipe 3b is suppressed in the width direction D of the second pipe 3b.

  The first pipe 2 is accommodated inside the pair of connecting portions 5b. The pair of connecting portions 5b are connected to the housing 6 by bolts 7, respectively. Each of the pair of housings 5 and 6 is a rigid body. And a pair of connection part 5b has connected the board part 5a and the housing | casing 6 firmly. Therefore, even if the 1st piping 2 expands thermally, the space | interval of a pair of housings | casings 5 and 6 does not change. Note that the means for fastening the pair of housings 5 and 6 is not limited to the bolt 7, and rubber or the like for binding the pair of housings 5 and 6 may be used.

  In the present embodiment, the second pipe 3 through which the cooling water having a temperature close to the ambient temperature outside the thermoelectric power generation unit 1 flows is disposed outside the pair of housings 5 and 6. 2 is arranged in the center of the pair of casings 5 and 6, respectively, so that the amount of heat leaking to the outside of the thermoelectric power generation unit 1 is reduced. However, when the low-temperature fluid is a liquefied gas or the like and the high-temperature fluid is closer to the external ambient temperature, the second pipe 3 is placed in the center of the pair of casings 5 and 6 and the first pipe 2 May be arranged outside the pair of casings 5 and 6 so that the amount of heat leaking to the outside of the thermoelectric power generation unit 1 is reduced. That is, in FIG. 3, the arrangement of the first pipe 2 and the second pipe 3 may be reversed.

  Further, the thermoelectric power generation unit 1 has a leaf spring (biasing means) 8 provided between the bottom surface of the recess 5c of the plate portion 5a and the second pipe 3a fitted into the recess 5c. The leaf spring 8 biases the second pipe 3 a toward the thermoelectric element 4. The urging force of the leaf spring 8 is designed in consideration of the thermal expansion of the first pipe 2.

  As shown in FIG. 4 which is a perspective view, the leaf spring 8 has a plate-like main body 8a. In the width direction D orthogonal to the longitudinal direction C and the sandwiching direction B of the second pipe 3a, biasing portions 8b for biasing the second pipe 3a are provided symmetrically at one end and the other end of the main body 8a. It has been. Further, the urging portion 8b provided at one end portion in the width direction D and the urging portion 8b provided at the other end portion in the width direction D are alternately provided in the longitudinal direction C of the second pipe 3a. It has been.

  As shown in FIG. 3, the plate spring 8 is disposed so that the main body 8a abuts on the plate portion 5a and the tip of the urging portion 8b contacts the second pipe 3a. The leaf spring 8 urges the second pipe 3a in the width direction D in a range straddling both ends of the second pipe 3a. Here, the end portion of the second pipe 3a is a portion in the range of 1/3 width from the end when the length (width) of the second pipe 3a in the width direction D is equally divided into three. By energizing the second pipe 3a in such a range, the second pipe 3a is not inclined with respect to the width direction D.

  Further, as shown in FIG. 5 which is a transparent perspective view of FIG. 2 viewed from the direction E, the leaf spring 8 is 70 centered on the center of the second pipe 3a in the longitudinal direction C of the second pipe 3a. The second pipe 3a is energized over the range of 100% to 100%. By energizing the second pipe 3a in such a range, the second pipe 3a is not inclined with respect to the longitudinal direction C.

  As shown in FIG. 3, since the leaf spring 8 is provided between the plate portion 5a and the second pipe 3a, once assembled, the second pipe 3a is connected to the thermoelectric element 4 with a set biasing force. Continue energizing towards. If the urging force of the leaf spring 8 is designed in consideration of the thermal expansion of the first pipe 2, it is not necessary to adjust the surface pressure of the thermoelectric element 4 after assembling the thermoelectric generator unit 1. . Therefore, the man-hour concerning adjustment of the surface pressure of the thermoelectric element 4 can be reduced.

  Moreover, even if the 1st piping 2 thermally expands by connecting firmly the board part 5a and the housing | casing 6 via a pair of connection part 5b, the space | interval of the board part 5a and the housing | casing 6 changes. You can avoid it. Therefore, it is possible to easily design the urging force in the leaf spring 8 in consideration of thermal expansion.

  Further, in the width direction D, the second pipe 3a is energized in a range straddling both ends of the second pipe 3a so that the second pipe 3a is not inclined with respect to the width direction D. Can do. Thereby, the 2nd piping 3a can be made to contact the thermoelectric element 4 equally along the width direction D. FIG.

  Further, in the longitudinal direction C, the second piping 3a is biased in the longitudinal direction C by energizing the second piping 3a over a range of 70% to 100% centered on the center of the second piping 3a. In contrast, it can be prevented from tilting. Thereby, the 2nd piping 3a can be made to contact the thermoelectric element 4 equally along the longitudinal direction C. FIG.

  Further, by providing symmetrically the urging portion 8b for urging the second pipe 3a at one end and the other end in the width direction D of the leaf spring 8, the second pipe 3a is extended along the width direction D. It can be energized evenly.

  In addition, the urging portion 8b provided at one end portion in the width direction D and the urging portion 8b provided at the other end portion in the width direction D are alternately provided in the longitudinal direction C, whereby the second pipe 3a can be evenly urged along the width direction D.

  As shown in FIG. 3, in the present embodiment, the plate spring 8 is disposed such that the main body 8a abuts on the plate portion 5a and the tip of the urging portion 8b contacts the second pipe 3a. However, the reverse may be possible. That is, the leaf spring 8 may be arranged such that the tip of the urging portion 8b contacts the plate portion 5a and the main body 8a contacts the second pipe 3a.

  Moreover, the thermoelectric power generation unit 1 has a pair of leaf springs (vibration suppressing means) 9 provided between the connecting portion 5b and the first pipe 2 as shown in FIG. These leaf springs 9 are equivalent to the leaf springs 8 shown in FIG. 4, and are connected between the upper connecting portion 5b and the first pipe 2 in the drawing and between the lower connecting portion 5b and the first connecting portion 5b. 1 between the two pipes 2. The leaf spring 9 is made of a shape or material that is difficult to conduct heat so as not to leak the heat of the first pipe 2 to the outside. The leaf spring 9 suppresses vibration of the first pipe 2 in the width direction D.

  Instead of the pair of leaf springs 9, the first pipe 2 is connected by using a plurality of bolts that respectively penetrate the pair of connecting portions 5 b in the width direction D and abut against the upper and lower surfaces of the first pipe 2. By supporting in the width direction D, vibration in the width direction D of the first pipe 2 may be suppressed.

  Further, as shown in FIG. 6, which is an enlarged view of the main part F of FIG. 3, a recess 2 a is provided along the longitudinal direction C on the wall surface of the first pipe 2 that contacts the thermoelectric element 4. The thermoelectric element 4 is fitted in the recess 2a. Thereby, the thermoelectric element 4 can be prevented from shifting in the width direction D.

  Moreover, as shown in FIG. 7 which is a GG sectional view of FIG. 6, a recess 3 e is provided along the width direction D on the wall surface of the second pipe 3 a that contacts the thermoelectric element 4. The thermoelectric element 4 is fitted in the recess 3e. Thereby, the thermoelectric element 4 can be prevented from shifting in the longitudinal direction C.

  As shown in FIG. 7, a gap 10 is provided between the first pipe 2 and the second pipe 3. Thus, heat exchange is not performed between the first pipe 2 and the second pipe 3.

  Instead of the recess 2a and the recess 3e, a recess along the outer shape of the thermoelectric element 4 may be provided, and the thermoelectric element 4 may be fitted in the recess. Moreover, the structure which provides only any one of the recessed part 2a and the recessed part 3e may be sufficient.

  As shown in FIG. 3, the first pipe 2, the second pipe 3, the thermoelectric element 4, the leaf spring 8, and the leaf spring 9 in a cross-sectional view orthogonal to the longitudinal direction C of the second pipe 3. Can be prevented from adhering to the thermoelectric element 4 by enclosing them with a pair of casings 5 and 6. Thereby, the energization part 4a of the thermoelectric element 4 can be made difficult to break down.

(Modification)
As shown in FIG. 8, which is a cross-sectional view taken along the line AA of FIG. 2, the leaf spring 8 is not between the bottom surface of the recessed portion 5c of the plate portion 5a and the second pipe 3a, but the recessed portion 6a of the housing 6. May be provided between the bottom surface of the second pipe 3b and the second pipe 3b fitted into the recess 6a. Of course, leaf springs 8 are provided between the bottom surface of the recess 5c of the plate portion 5a and the second pipe 3a, and between the bottom surface of the recess 6a of the housing 6 and the second pipe 3b, respectively. Also good.

  Moreover, as shown in FIG. 9 which is AA sectional drawing of FIG. 2, the 2nd piping 3 may be one.

  Moreover, as shown in FIG. 10 which is AA sectional drawing of FIG. 2, the 4th 2nd piping 3 may be provided around the 1st piping 2. As shown in FIG. A thermoelectric element 4 is provided between each of the four second pipes 3 and the first pipe 2. In this case, in the clamping direction B, at least one of the two second pipes 3 is urged toward the thermoelectric element 4, and in the width direction D, at least one of the two second pipes 3 is connected to the thermoelectric element. By providing the leaf springs 8 that bias the elements 4 toward each other, the surface pressure of each thermoelectric element 4 can be kept at a set value.

(effect)
As described above, according to the thermoelectric power generation unit 1 according to the present embodiment, as shown in FIG. 3, the leaf spring 8 provided between the second pipe 3a and the plate portion 5a adjacent thereto is used. The second pipe 3 a is urged toward the thermoelectric element 4. Since this leaf spring 8 is provided between the second pipe 3a and the plate portion 5a, once it is assembled, it continues to bias the second pipe 3a toward the thermoelectric element 4 with a set biasing force. . If the urging force of the leaf spring 8 is designed in consideration of the thermal expansion of the first pipe 2, it is not necessary to adjust the surface pressure of the thermoelectric element 4 after assembling the thermoelectric generator unit 1. . Therefore, the man-hour concerning adjustment of the surface pressure of the thermoelectric element 4 can be reduced.

  Moreover, even if the 1st piping 2 thermally expands by connecting firmly a pair of housing | casing 5 and 6 via the connection part 5b, the space | interval of a pair of housings 5 and 6 is prevented from changing. be able to. Therefore, it is possible to easily design the urging force in the leaf spring 8 in consideration of thermal expansion.

  Moreover, in the width direction D, the 2nd piping 3a is not inclined with respect to the width direction D by energizing the 2nd piping 3a with the leaf | plate spring 8 in the range which straddles the both ends of the 2nd piping 3a. Can be. Thereby, the 2nd piping 3a can be made to contact the thermoelectric element 4 equally along the width direction D. FIG.

  Further, as shown in FIG. 5, in the longitudinal direction C, the second pipe 3a is biased by the leaf spring 8 over a range of 70% or more and 100% or less around the center of the second pipe 3a. The second pipe 3a can be prevented from being inclined with respect to the longitudinal direction C. Thereby, the 2nd piping 3a can be made to contact the thermoelectric element 4 equally along the longitudinal direction C. FIG.

  Further, as shown in FIG. 4, the second pipe 3a is provided symmetrically at one end and the other end in the width direction D of the leaf spring 8 so as to bias the second pipe 3a. Can be evenly biased along the width direction D.

  In addition, the urging portion 8b provided at one end portion in the width direction D and the urging portion 8b provided at the other end portion in the width direction D are alternately provided in the longitudinal direction C, whereby the second pipe 3a can be evenly urged along the width direction D.

  Further, as shown in FIG. 3, by fitting the second pipe 3 a adjacent to the plate part 5 a into the recess 5 c, the assemblability is improved and the second pipe 3 a is prevented from vibrating in the width direction D. be able to.

  Further, by providing the leaf spring 9 between the connecting portion 5 b and the first pipe 2, vibration in the width direction D of the first pipe 2 can be suppressed.

  Also, as shown in FIGS. 6 and 7, in the first pipe 2 and the second pipe 3, the recesses 2 a and 3 e are provided on the surface in contact with the thermoelectric element 4 to fit the thermoelectric element 4. As a result, the thermoelectric element 4 can be prevented from shifting in the width direction D or the longitudinal direction C.

  In addition, as shown in FIG. 3, the first pipe 2, the second pipe 3, the thermoelectric element 4, and the leaf springs 8 and 9 in the cross-sectional view orthogonal to the longitudinal direction C of the second pipe 3 a By enclosing with a pair of housing | casing 5,6, it can suppress that dust adheres to the thermoelectric element 4. FIG. Thereby, the energization part 4a of the thermoelectric element 4 can be made difficult to break down.

(Modification of this embodiment)
The embodiment of the present invention has been described above, but only specific examples are illustrated, and the present invention is not particularly limited, and the specific configuration and the like can be appropriately changed in design. Further, the actions and effects described in the embodiments of the invention only list the most preferable actions and effects resulting from the present invention, and the actions and effects according to the present invention are described in the embodiments of the present invention. It is not limited to what was done.

  For example, although the leaf spring 8 is used as an urging means for urging the second pipe 3 toward the thermoelectric element 4, other urging means such as a panel having a large number of coil springs attached thereto are used. Also good. With another urging means, the second pipe 3 is urged in the range across the both ends of the second pipe 3 in the width direction D, and the center of the second pipe 3 is centered in the longitudinal direction C. By energizing the second pipe 3 over a range of 70% or more and 100% or less, the second pipe 3 can be brought into contact with the thermoelectric elements 4 evenly in the width direction D and the longitudinal direction C. it can.

DESCRIPTION OF SYMBOLS 1 Thermoelectric power generation unit 2 1st piping 2a Concave part 3, 3a, 3b 2nd piping 3c Inflow pipe 3d Outflow pipe 3e Concave part 4 Thermoelectric element 4a Current supply part 5 Case 5a Plate part (plate member)
5b Connecting part (connecting member)
5c Concave part 6 Case (plate member)
6a Concave portion 7 Bolt 8 Leaf spring (biasing means)
8a body 8b urging portion 9 leaf spring (vibration suppressing means)
DESCRIPTION OF SYMBOLS 10 Clearance 20 Work machine 21 Upper turning body 22 Counterweight 23 Engine room

Claims (10)

A first pipe having a rectangular cross section filled with a first medium;
A second pipe having a rectangular cross section provided in parallel with the first pipe and filled with a second medium having a temperature different from that of the first medium;
A thermoelectric element sandwiched between the first pipe and the second pipe;
A pair of plate members sandwiching the first pipe and the second pipe from a sandwiching direction in which the first pipe and the second pipe sandwich the thermoelectric element;
A connecting member for connecting the plate members;
A biasing means provided between the second pipe and the plate member adjacent to the second pipe, and biasing the second pipe toward the thermoelectric element;
A thermoelectric power generation unit comprising: The pair of plate members and the connecting member are rigid bodies,
The thermoelectric power generation unit according to claim 1, wherein the pair of plate members are firmly connected via the connection member.   The biasing means biases the second pipe in a range straddling both ends of the second pipe in the longitudinal direction of the second pipe and the width direction orthogonal to the clamping direction. The thermoelectric power generation unit according to claim 1 or 2.   The biasing means biases the second pipe in a longitudinal direction of the second pipe over a range of 70% or more and 100% or less around the center of the second pipe. The thermoelectric power generation unit according to any one of claims 1 to 3. The biasing means is a leaf spring,
In the longitudinal direction of the second pipe and the width direction orthogonal to the clamping direction, biasing portions for biasing the second pipe are provided symmetrically at one end and the other end of the biasing means. The thermoelectric power generation unit according to claim 1, wherein the thermoelectric generation unit is provided.   The urging portion provided at one end portion in the width direction and the urging portion provided at the other end portion in the width direction are alternately provided in the longitudinal direction of the second pipe. The thermoelectric power generation unit according to claim 5. The plate member is provided with a recess along the longitudinal direction of the second pipe,
The thermoelectric power generation unit according to claim 1, wherein the second pipe adjacent to the plate member is fitted in the recess.   Vibration suppression means provided between the connecting member and the first pipe, and for suppressing vibration of the first pipe in a width direction perpendicular to the longitudinal direction of the first pipe and the clamping direction; The thermoelectric power generation unit according to claim 1, wherein the thermoelectric power generation unit is provided. The wall surface contacting the thermoelectric element of at least one of the first pipe and the second pipe is provided with a recess,
The thermoelectric power generation unit according to claim 1, wherein the thermoelectric element is fitted in the recess.   In a cross-sectional view orthogonal to the longitudinal direction of the second pipe, at least the first pipe, the second pipe, the thermoelectric element, and the biasing means are provided by the pair of plate members and the connecting member. Is enclosed, The thermoelectric power generation unit of any one of Claims 1-9 characterized by the above-mentioned.

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