WO2014054640A1 - 熱電変換式発電装置 - Google Patents
熱電変換式発電装置 Download PDFInfo
- Publication number
- WO2014054640A1 WO2014054640A1 PCT/JP2013/076706 JP2013076706W WO2014054640A1 WO 2014054640 A1 WO2014054640 A1 WO 2014054640A1 JP 2013076706 W JP2013076706 W JP 2013076706W WO 2014054640 A1 WO2014054640 A1 WO 2014054640A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thermoelectric conversion
- cooling
- conversion module
- plate member
- rigid portion
- Prior art date
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 212
- 238000001816 cooling Methods 0.000 claims abstract description 123
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000010248 power generation Methods 0.000 claims description 44
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 13
- 239000012809 cooling fluid Substances 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 5
- 230000001737 promoting effect Effects 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 description 19
- 238000007789 sealing Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 15
- 238000005304 joining Methods 0.000 description 15
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 230000001603 reducing effect Effects 0.000 description 9
- 230000006837 decompression Effects 0.000 description 8
- 238000005219 brazing Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000013585 weight reducing agent Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005678 Seebeck effect Effects 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/13—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
Definitions
- the present invention relates to a thermoelectric power generation apparatus that converts a thermal energy into an electrical energy by giving a temperature difference to a thermoelectric conversion module housed in an airtight container.
- thermoelectric conversion element uses a Seebeck effect in which a potential difference is generated between a high-temperature part and a low-temperature part by giving a temperature difference to a separated part, and the power generation amount increases as the temperature difference increases.
- thermoelectric conversion element is used in the form of a thermoelectric conversion element module in which a plurality of thermoelectric conversion elements are joined. Then, the thermoelectric conversion module is sandwiched between the heating-side plate member and the cooling-side plate member, and the heating-side plate member is heated and the cooling-side plate member is cooled to give a temperature difference to the thermoelectric conversion module.
- a thermoelectric power generation apparatus that obtains electricity from the thermoelectric conversion module is configured (see Patent Document 1, etc.).
- thermoelectric conversion module As one of the measures for increasing the temperature difference of the thermoelectric conversion module, the plate members on the heating side and the cooling side, which are arranged with the thermoelectric conversion module interposed therebetween, are brought into close contact with the thermoelectric conversion module in a uniform state. It is effective to increase the thermal conductivity through the substrate.
- each plate member can be brought into close contact with the thermoelectric conversion module in a pressurized state using a fastening member such as a tie rod or a nut as in Patent Document 1 described above.
- a fastening member such as a tie rod or a nut as in Patent Document 1 described above.
- it is difficult to press the plate member to the thermoelectric conversion module with a uniform pressure and the configuration of the apparatus becomes complicated and the cost increases.
- the present invention has been made in view of the above circumstances, and its main problem is that each plate member on the heating side and the cooling side of a hermetic container disposed across the thermoelectric conversion module to give a temperature difference to the thermoelectric conversion module Can be adhered to the thermoelectric conversion module in a uniform pressure state without the complexity and cost of the device, and the thermoelectric conversion type can contribute to improvement in design and design freedom and weight reduction. It is to provide a power generation device.
- thermoelectric conversion power generation device of the present invention is a state in which a hermetic container including a heating-side plate member and a cooling-side plate member is disposed between the heating-side plate member and the cooling-side plate member. And a thermoelectric conversion module disposed in the sealed container, wherein the heating side plate member is heated and the cooling side plate member is cooled to give a temperature difference to the thermoelectric conversion module.
- thermoelectric conversion power generation device that generates power from the thermoelectric conversion module, wherein at least one of the heating-side plate member and the cooling-side plate member is in a reduced pressure state in the sealed container.
- thermoelectric conversion module A movable plate member that is brought into contact with the thermoelectric conversion module in a pressurized state due to a pressure difference between the inside and outside of the sealed container that is generated in this manner, and the movable plate member has rigidity and is attached to the thermoelectric conversion module.
- Rigid rigidity When formed continuous with the rigid portion, and deformed by the pressure difference, characterized by having a, a deformation portion that is brought into contact with the thermoelectric conversion module of the rigid portion by deformation.
- the assembled state is completed by reducing the pressure in the sealed container to a predetermined pressure.
- a pressure difference occurs between the inside and outside of the sealed container due to the internal pressure reduction, and the deformable portion is deformed by the pressure reducing action in the movable plate member having the rigid portion and the deformable portion, and the rigid portion is pressurized to the thermoelectric conversion module by the external pressure. Abut and adhere. Since the plate member on the movable side is brought into close contact with the thermoelectric conversion module by reducing the pressure in the sealed container without using a fastening member such as a tie rod or nut, the device on the movable side becomes complicated and expensive. It can be made to adhere to a thermoelectric conversion module in the uniform pressurization state without. And since the member for fastenings, such as a bolt and a nut, is not used, it can contribute to the improvement in design, the freedom degree of design, and weight reduction.
- the portion that is in close contact with the thermoelectric conversion module is a rigid portion, so that the thermoelectric conversion module can be surely brought into contact with the thermoelectric conversion module without causing deformation. Easy to obtain uniform pressure on the module.
- the inside of the sealed container is depressurized, the inside of the sealed container is less likely to be heated than when a gas such as air is present at normal pressure, and the internal gas expands to affect the sealed container, or the thermoelectric Generation
- the present invention includes a form in which the deformable portion is deformable by the pressure difference because the plate thickness is smaller than that of the rigid portion. According to this embodiment, the deformable portion can be easily configured.
- the present invention includes a form in which the cooling-side plate member is the movable-side plate member, and the rigid portion is provided with fins for promoting cooling.
- the cooling effect of the plate member on the cooling side is improved, the temperature difference generated in the thermoelectric conversion module is further increased, and the power generation performance is further improved.
- the rigidity of the rigid portion is increased by the fin, and the effect of preventing the deformation of the rigid portion can be further enhanced. Furthermore, since it is a rigid part, it is easy to fix a fin.
- the deforming portion is provided in a state extending laterally from the outer side opposite to the thermoelectric conversion module side in the peripheral surface of the rigid portion, and the peripheral surface of the rigid portion is It includes a form that is formed in a substantially tapered shape that protrudes laterally from the outside toward the inside that is the thermoelectric conversion module side. According to this aspect, the deformed portion that is deformed by the pressure reducing action is less likely to interfere with the peripheral surface of the rigid portion, and the deformed portion is less likely to be broken or cracked.
- the sealed container has a hollow portion surrounded by the heating-side plate member, the thermoelectric conversion module is disposed around the hollow portion, and the thermoelectric conversion module is disposed outside the thermoelectric conversion module.
- a cooling-side plate member is disposed, and a heating fluid is circulated through the hollow portion to heat the heating-side plate member.
- the heating-side plate member can be efficiently heated without causing the heating fluid to diffuse by allowing the heating fluid to flow through the hollow portion.
- the present invention includes a form in which the thermoelectric conversion module is not joined to the rigid portion.
- the thermoelectric conversion module or the rigid portion expands / shrinks due to heating / cooling, the rigid portion and the thermoelectric conversion module are in a non-bonded state, so that both move relatively in contact with each other. Therefore, there is no problem of deformation due to stress caused by thermal effects.
- the present invention includes a form in which the deforming portion is an elastic portion that is elastically deformed and elastically pressurizes and contacts the rigid portion to the thermoelectric conversion module side.
- the rigid portion is pressed against and contacted with the thermoelectric conversion module also by the action of the elastic portion, so that the adhesion of the rigid portion to the thermoelectric conversion module can be further improved.
- the present invention includes a form having an elastic member that presses and contacts at least one of the heating-side plate member and the cooling-side plate member against the thermoelectric conversion module.
- the rigid portion is also pressed against the thermoelectric conversion module by the elastic member and comes into contact with the thermoelectric conversion module, so that the adhesion of the rigid portion to the thermoelectric conversion module can be further improved.
- a pressing plate is disposed on an outer surface side of the plate member that is pressed against and contacts the thermoelectric conversion module by the elastic member, and the elastic member is interposed between the pressing plate and the plate member. Including the sandwiched form.
- the elastic member can generate and hold the elastic force, and the elastic force of the elastic member can be maintained. A structure that is surely applied to the thermoelectric conversion module is obtained.
- the elastic member includes a form in which the elastic member is bonded to either the plate member or the pressing plate, and the other side is in a non-bonded state.
- the elastic member is joined to either the plate member or the pressing plate, so that the elastic member can be easily handled and can be easily assembled.
- the non-joined side of the elastic member can move relative to the thermoelectric conversion module or plate member, which causes stress due to thermal effects. It is difficult to cause problems such as deformation.
- the plate member is a plate member on the cooling side, and includes a mode in which a cooling medium flows between the plate member and the pressing plate, and the cooling medium contacts the elastic member.
- the temperature of the cooling-side plate member is transmitted to the elastic member, and the elastic member is cooled by the cooling medium, so that the cooling efficiency of the cooling-side plate member is improved. That is, the heat dissipation effect by the elastic member can be obtained.
- the elastic member in this case is preferably formed in a fin shape for promoting cooling. Examples of the fin shape include a corrugated cross section, a V shape, a U shape, and an ⁇ shape.
- the present invention further includes a cooling chamber in which the movable plate member is the cooling plate member, the cooling fluid is supplied, and the cooling fluid is brought into contact with the cooling plate member.
- the embodiment includes a mode in which the rigid portion of the cooling-side plate member is brought into contact with the thermoelectric conversion module in a pressurized state by an internal pressure generated in the cooling chamber by the cooling fluid.
- the rigid part of the cooling-side plate member is brought into contact with the thermoelectric conversion module in a pressurized state by the internal pressure of the cooling chamber generated by supplying the cooling fluid. Adhesion can be further improved.
- the applied pressure from the cooling-side plate member can be transmitted to the heating-side plate member via the thermoelectric conversion module, the heating-side plate member is brought into close contact with the thermoelectric conversion module in a uniform pressure state. It is also possible.
- the plate members on the heating side and the cooling side of the hermetic container disposed with the thermoelectric conversion module sandwiched between them in order to give a temperature difference to the thermoelectric conversion module can be obtained without making the apparatus complicated and expensive.
- the thermoelectric conversion module can be brought into close contact with the thermoelectric conversion module in a uniform pressure state, and there is an effect that a thermoelectric conversion power generation device that can contribute to improvement in design and freedom of design and weight reduction is provided.
- thermoelectric conversion power generator according to a first embodiment of the present invention. It is a perspective view which shows the state which removed the outer side cover and the sealing cover in the thermoelectric conversion electric power generating apparatus of 1st Embodiment. It is a side view of the thermoelectric conversion type electric power generating apparatus of 1st Embodiment.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a front view of the thermoelectric conversion type electric power generating apparatus of 1st Embodiment.
- FIG. 6 is a sectional view taken along line VI-VI in FIG. 5.
- thermoelectric conversion module with the elastic board pinched
- a state where pressure is applied is shown.
- thermoelectric conversion module Comprising: (a) The state before joining a cooling case, (b) Inside rigidity of a movable board part by joining a cooling case and an elastic board The state in which the part is pressurized to the thermoelectric conversion module is shown. It is sectional drawing which shows typically the periphery of the edge part cooling part in the electric power generation unit of the thermoelectric conversion power generator which concerns on 3rd Embodiment of this invention, Comprising: (a) Before decompressing the inside of a sealed container, (b) Sealing The inside of the container is shown in a decompressed state.
- thermoelectric conversion module in a pressurized state.
- sectional drawing which shows the modification of 4th Embodiment, Comprising: It is a modification which made the spring plate which comprises the elastic part of a movable plate part cyclic
- Thermoelectric conversion type generator 3 Sealed container 31 ... Movable plate part (cooling side plate member, movable side plate member) of housing 312 ... Inner rigid part (rigid part) 312b ... Peripheral surface 313 ... Deformation part 317 ... Elastic part 351 ... Hollow part 36 ... Inner plate part (plate member on heating side) of flow pipe 4 ... Thermoelectric conversion module 53B ... Cooling case (pressing plate) 53a, 53b ... Cooling jacket (cooling chamber) 7 ... Fin 70 ... Elastic plate (elastic member) H ... Heating fluid W ... Cooling water (cooling fluid)
- FIGS. 1 to 6 show a thermoelectric conversion power generation device (hereinafter referred to as a power generation device) 1 of a first embodiment.
- a power generation device 1 a thermoelectric conversion power generation device (hereinafter referred to as a power generation device) 1 of a first embodiment.
- a plurality of power generation units 2 each having a sealed container 3 are stacked in a parallel state with a cooling unit 5A sandwiched in the Y direction in the figure, and cooling units are also provided on both side surfaces of the entire device 1, that is, both ends in the Y direction. 5B is arranged.
- the number of the power generation units 2 is arbitrary, and in this case, the power generation apparatus 1 is configured by stacking four power generation units 2.
- the sealed container 3 includes a substantially rectangular parallelepiped box-shaped casing 30 whose longitudinal section (YZ section) is long in the Z direction, and a flat tube whose longitudinal section disposed in the center of the casing 30 is long in the Z direction. And a sealing cover 38 (see FIG. 6) that closes the openings at both ends in the X direction.
- Both the casing 30 and the flow pipe 35 are open at both ends in the X direction, and the inside of the flow pipe 35 is a hollow portion 351 through which a heating fluid described later flows in the X direction.
- the housing 30 includes a pair of movable plate portions (a cooling-side plate member and a movable-side plate member of the present invention) 31 that are parallel to the XZ plane and face each other, and a movable plate.
- a pair of flat end plate portions 32 connecting the upper and lower edges of the portion 31 are formed in a substantially rectangular box shape.
- the flow pipe 35 has a semicircular cross section that connects a pair of opposed inner plate portions (plate members on the heating side of the present invention) 36 parallel to the XZ plane and the upper and lower edges of the inner plate portion 36.
- a pair of arcuate curved portions 37 is formed into a flat tubular shape.
- Fins 352 are disposed inside the distribution pipe 35, that is, in the hollow portion 351 of the sealed container 3.
- the fins 352 are formed, for example, by bending a plate material into a corrugated plate shape, and are joined by a joining means such as brazing while the outer side of the bent portion is in contact with the inner surface of the inner plate portion 36.
- thermoelectric conversion module 4 is each arrange
- the plurality of sealed containers 3 in which the thermoelectric conversion modules 4 are disposed in a pair of states in regions on both sides in the Y direction of the internal space 3 a include the cooling unit 5 ⁇ / b> A between the movable plate units 31. They are stacked in parallel in the Y direction.
- cooling units 5B are also disposed on the outer surfaces of the movable plate 31 at both ends in the Y direction.
- the cooling unit 5A between the sealed containers 3 is referred to as an intermediate cooling unit 5A
- the cooling units 5B at both ends in the Y direction are referred to as end cooling units 5B.
- thermoelectric conversion module 4 connects one surface and the other surface of a plurality of thermoelectric conversion elements 41 arranged in a plane in a zigzag manner by an electrode 42 made of copper or the like.
- the electrode 42 on one surface side is joined to the inner surface of the inner plate portion 36 of the flow pipe 35 by a joining means such as brazing.
- the electrode 42 on the other surface side of the thermoelectric conversion module 4 is in contact with the inner surface of the inner rigid portion 312 described later of the movable plate portion 31 of the housing 30. That is, the thermoelectric conversion module 4 is in a non-bonded state with the inner rigid portion 312, and both can move relative to each other along the contact surface.
- thermoelectric conversion element 41 constituting the thermoelectric conversion module 4 a type having a high heat resistance temperature is used.
- a silicon-germanium system, a magnesium-silicon system, a manganese-silicon system, an iron silicide system, or the like is preferably used.
- the thermoelectric conversion module 4 is connected to a pair of terminals 43 for taking out electricity.
- the terminal 43 extends upward in the upper part of the internal space 3 a, and penetrates the end plate portion 32 on the upper side of the sealed container 3 and protrudes to the outside.
- the through hole of the terminal 43 of the end plate part 32 is subjected to a process of hermetically closing.
- the opening on the X side of the internal space 3 a of the sealed container 3 is closed by an oval sealing cover 38 as a whole with a U-shaped cross section that is recessed inward.
- the sealing cover 38 is airtightly joined to the inner surface of an outer rigid portion 311 (described later) of the movable plate portion 31 and the outer surface of the end portion in the X direction of the flow pipe 35.
- the internal space 3 a of the sealed container 3 is hermetically sealed by the housing 30, the distribution pipe 35 and the sealing cover 38.
- Outer covers 33 are joined to both end surfaces in the X direction of the casing 30 of each sealed container 3, and both sides in the X direction of the apparatus 1 are covered with the outer covers 33. Both end portions in the X direction of each flow pipe 35 protrude from each housing 30, and the protruding end portions pass through flow pipe insertion holes 331 formed in the outer cover 33 and protrude to the outside.
- the movable plate portion 31 constituting the casing 30 of the airtight container 3 includes an outer rigid portion 311 whose outer shape is formed in a rectangular frame shape, and an outer side.
- the inner rigid portion 312 having the same thickness as the outer rigid portion 311 disposed inside the rigid portion 311 and the gap 314 having a constant width formed between the outer rigid portion 311 and the inner rigid portion 312 are closed. It has a deformed portion 313 that is thinner than the thickness of each of the disposed rigid portions 311 and 312.
- the inner edge 311a of the outer rigid portion 311 is formed in a substantially oval shape
- the outer edge 312a of the inner rigid portion 312 is formed in a substantially oval shape with a certain gap 314 from the inner edge 311a of the outer rigid portion 311.
- a flexible thin plate 315 is joined to the outer surface of the inner rigid portion 312 by a joining means such as brazing.
- the thin plate 315 has a size that covers the gap 314 between the rigid portions 311, 312 and reaches the outer surface of the outer rigid portion 311, and the outer edge portion is joined to the outer surface of the outer rigid portion 311 such as brazing. It is joined with.
- the thin plates 315 are connected so that the rigid portions 311 and 312 are in the same plane.
- the rigid portions 311 and 312 are present in the same plane, but the positional relationship between the rigid portions 311 and 312 is not limited to this, and one of the rigid portions 311 and 312 is displaced inward by the thin plate 315.
- the connected structure may be sufficient.
- a portion of the thin plate 315 covering the gap 314 constitutes a substantially annular deformable portion 313 having flexibility, and a convex portion projecting inward is formed at the center in the width direction of the deformable portion 313 as shown in FIG.
- a strip 313a is formed over the entire circumference.
- the deformable portion 313 is provided in a state of extending from the outer side of the peripheral surface 312 b of the inner rigid portion 312 to the outer side of the inner edge 311 a of the outer rigid portion 311. Edges on both sides in the Z direction of the outer rigid portion 311 are formed so as to be integrated with the end plate portion 32.
- the outer rigid portion 311 on both sides is integrally formed with the pair of upper and lower end plate portions 32, and the inner rigid portion 312 is joined to the outer rigid portion 311 via the thin plate 315 to constitute the housing 30.
- the inner rigid portion 312 has a size that covers the thermoelectric conversion module 4 and is in contact with the entire surface of one side of the thermoelectric conversion module 4.
- a plurality of decompression sealing ports 321 are provided in the upper end plate portion 32 of the sealed container 3, and the internal space 3 a in the sealed container 3 is decompressed using these decompression sealing ports 321.
- the sealed container 3 sucks the air inside from the decompression sealing port 321 to decompress the internal space 3a in the sealed container 3 to a predetermined pressure (for example, about 1 to 100 Pa), and welds the decompression sealing port 321. Thus, it is in an airtightly sealed state. As a result, a pressure difference is generated in the sealed container 3 such that the inside has a pressure lower than that of the outside atmosphere, and the movable plate portion 31 of the housing 30 receives a force that is pressurized inward by the pressure difference.
- a predetermined pressure for example, about 1 to 100 Pa
- FIG. 8A shows a state before the inside of the sealed container 3 is depressurized.
- the movable plate portion 31 When the movable plate portion 31 is pressurized inward by being depressurized, it has flexibility as shown in FIG. 8B.
- the deformed portion 313 is deformed so that the protruding strip portion 313 a further protrudes inward, whereby the inner rigid portion 312 is in strong contact with the thermoelectric conversion module 4 and is in a state of being in close contact with the thermoelectric conversion module 4.
- the intermediate cooling unit 5A and the end cooling unit 5B include cooling cases 53A and 53B, respectively.
- the cooling case 53A of the intermediate cooling part 5A is formed in a frame shape along the periphery of the outer rigid part 311 of the movable plate part 31, and is sandwiched between adjacent outer rigid parts 311. It is joined to the outer peripheral edge. That is, in the present apparatus 1, the adjacent casings 30 are in a state where the adjacent outer rigid portions 311 are joined together via the cooling case 53A.
- a cooling jacket 53a is formed inside the intermediate cooling part 5A surrounded by the cooling case 53A and the movable plate parts 31 on both sides sandwiching the cooling case 53A to cool the movable plate part 31 as a cooling water flow path. Has been.
- the cooling case 53B of the end cooling unit 5B is formed in a lid shape that covers the movable plate 31 at the end, and the shallow recess formed on one side is directed toward the movable plate 31 to end the cooling plate 53B.
- the edge is joined to the outer peripheral edge of the outer rigid portion 311.
- a cooling jacket 53 b that is supplied with cooling water to cool the movable plate portion 31 is formed in the end cooling portion 5 ⁇ / b> B surrounded by the inner surface of the cooling case 53 ⁇ / b> B and the movable plate portion 31.
- a cooling water supply port 51 is formed at the lower end surface and a cooling water drain port 52 is formed at the upper end surface of each of the cooling cases 53A and 53B of the intermediate cooling unit 5A and the end cooling unit 5B.
- the cooling water supply port 51 and the cooling water drain port 52 are formed in the center in the X direction, and a cooling water supply pipe and a drain pipe (not shown) are connected to the cooling water supply port 51 and the cooling water drain port 52, respectively.
- fins 7 formed in, for example, a corrugated shape are accommodated. One end of the fin 7 is joined to the inner rigid portion 312 and the other end is in contact with the inner surface of the cooling case 53B without being joined.
- cooling water is supplied and circulated into the cooling jackets 53a and 53b to cool the movable plate portion 31 of the sealed container 3.
- a high-temperature heating fluid H is passed through each flow pipe 35 from one end side to the other end side to heat the flow pipe 35.
- the temperature of the cooled movable plate portion 31 is transmitted to the outer surface side of the thermoelectric conversion module 4, and the outer surface side of the thermoelectric conversion module 4 is cooled, while the temperature of the inner plate portion 36 of the heated flow pipe 35 is heated.
- the inner surface side of the thermoelectric conversion module 4 is heated.
- the heating fluid H does not diffuse by flowing through the hollow portion 351, and the inner plate portion 36 of the flow pipe 35 is efficiently heated.
- the movable plate portion 31 of the housing 30 serves as a cooling-side plate member, and the inner plate portion 36 of the flow pipe 35 constitutes a heating-side plate member.
- a temperature difference is given between the outer surface side and the inner surface side of the thermoelectric conversion module 4, whereby the thermoelectric conversion module 4 generates power and electricity is taken out from the terminal 43.
- exhaust heat gas generated in a factory or a garbage incinerator, automobile exhaust gas, or the like is used as the heating fluid H.
- the pressure inside the sealed container 3 is reduced to create a pressure difference between the inside and the outside of the sealed container 3, so that the thermoelectric conversion module 4 is simply used in a state where pressure is not reduced.
- the inner rigid portion 312 of the movable plate portion 31 that is in contact with the thermoelectric conversion module 4 is in contact with the thermoelectric conversion module 4 in a pressurized state, and is in a state of being in close contact with the thermoelectric conversion module 4.
- the movable plate portion 31 includes an inner rigid portion 312 that abuts the thermoelectric conversion module 4 and a deformable portion 313 having flexibility around the movable plate portion 31.
- the rigid portion 312 can easily come into contact with the thermoelectric conversion module 4 uniformly. For this reason, the thermal conductivity from the cooling parts 5A and 5B to the thermoelectric conversion module 4 through the inner rigid part 312 of the movable plate part 31 is improved, and the temperature difference given to the thermoelectric conversion module 4 is increased, resulting in power generation performance. Will improve.
- the inner rigid portion 312 of the movable plate portion 31 that is a cooling-side plate member is thermoelectrically converted by reducing the pressure in the sealed container 3 without using a fastening member such as a tie rod or a nut. Since the module 4 is brought into close contact with the module 4, the inner rigid portion 312 can be brought into close contact with the thermoelectric conversion module 4 in a uniform pressure state without being complicated and expensive. Further, since no fastening member such as a bolt and a nut is used, the design and the degree of freedom of design can be improved and the weight can be reduced.
- the inner rigid portion 312 that is brought into close contact with the thermoelectric conversion module 4 by the pressure reducing action is set to a thickness that does not cause deformation even when pressurized to the thermoelectric conversion module 4 side, while the deformation portion 313 is a sealed container.
- the inner rigid portion 312 can be deformed following the inward movement. For this reason, it is possible to prevent the inner rigid portion 312 from being deformed, and the inner rigid portion 312 can reliably come into contact with the thermoelectric conversion module 4 on the surface and be in close contact with the thermoelectric conversion module 4.
- the inside of the sealed container 3 is depressurized, the inside of the sealed container 3 is less likely to be heated than when a gas such as air is present in the internal space 3a at normal pressure, and the internal gas expands and affects the sealed container 3 Or the occurrence of problems such as deterioration of the thermoelectric conversion module 4 due to heating can be suppressed.
- the deformable portion 313 of the movable plate portion 31 can be deformed because the plate thickness is smaller than that of the inner rigid portion 312, and the deformable portion 313 can be easily provided.
- the inner rigid portion 312 of the movable plate portion 31 is in close contact with the thermoelectric conversion module 4 but is not joined, and the inner rigid portion 312 and the thermoelectric conversion module 4 are relatively aligned with each other along the contact surface. It is movable. For this reason, when the thermoelectric conversion module 4 or the inner rigid portion 312 expands / shrinks due to heating / cooling, they both move relative to each other along the abutting surface, and as a result, stress due to the thermal effect is applied. It does not cause problems such as deformation.
- the fins 7 are attached to the outer surface of the inner rigid portion 312 of the movable plate portion 31, the cooling effect is improved and the temperature difference generated in the thermoelectric conversion module 4 can be further increased, and the power generation performance is further improved.
- the rigidity of the inner side rigid part 312 increases by the fin 7, and the effect
- the peripheral surface 312b of the inner rigid portion 312 of the movable plate portion 31 is arranged from the outer side to the inner side (in FIG. 9, opposite to the thermoelectric conversion module 4 side). From the upper side of the side toward the lower side of the thermoelectric conversion module 4 side, it is formed in a substantially tapered shape that protrudes inclined to the side. According to this embodiment, the deformed portion 313 that is deformed inward by the pressure reducing action is less likely to interfere with the corner portion between the peripheral surface 312b and the outer surface of the inner rigid portion 312, and the deformed portion 313 is less likely to be damaged or cracked. .
- the tapered peripheral surface 312b is a flat surface, but it may be formed into a concave curved surface or a convex curved surface as it goes from the outside to the inside as necessary.
- the thin plate 315 constituting the deformable portion 313 does not cover the entire outer surface of the inner rigid portion 312, but is wide enough to cover the gap 314 between the outer rigid portion 311 and the inner rigid portion 312. It is good also as what was formed in the cyclic
- thermoelectric conversion module 4 the cooling side plate member (in this case, the inner rigid portion 312 of the movable plate portion 31 in the sealed container 3) and the heating side plate member (in this case, the inside of the flow pipe 35 in the sealed container 3).
- a cushioning material made of a flexible material may be disposed between at least one of the plate portions 36).
- an elastic plate (elastic member) 70 is provided instead of the fin 7 of the first embodiment.
- a plurality of elastic plates 70 are sandwiched between the cooling case (pressing plate) 53B and the inner rigid part 312 in a compressed state.
- the elastic plate 70 has a fin shape with a corrugated cross section. One end of the elastic plate 70 is joined to the inner surface of the cooling case 53B, the other end abuts the inner rigid portion 312 and is not joined.
- FIG. 11A shows a state before the cooling case 53B is joined to the outer rigid portion 311 of the movable plate portion 31, and the other end portion on the inner rigid portion 312 side of the elastic plate 70 in the free state is connected to the inner side.
- the rigid portion 312 is in contact with the outer surface.
- the joining edge of the cooling case 53B to the outer rigid portion 311 is spaced apart from the outer rigid portion 311.
- the cooling case 53B moves toward the movable plate portion 31 against the elastic force of the elastic plate 70, presses the joining edge against the outer rigid portion 311, and is joined to the outer rigid portion 311 while maintaining this state. .
- the elastic plate 70 in the cooling jacket 53b is sandwiched between the cooling case 53B and the inner rigid portion 312 in an elastically compressed state.
- each of the plurality of elastic plates 70 provided in the cooling jacket 53 a of the intermediate cooling unit 5 ⁇ / b> A is joined to one of the inner rigid portions 312, and the other end is the inner rigid portion 312. It is abutted and not joined.
- the elastic plate 70 of the intermediate cooling portion 5A is compressed by bringing the adjacent inner rigid portions 312 close to each other when the adjacent sealed containers 3 are bonded via the cooling case 53A. Is held between the two.
- the sealed container 3 sucks the air inside from the decompression sealing port 321 to decompress the internal space 3a in the sealed container 3 to a predetermined pressure (for example, about 1 to 100 Pa), and welds the decompression sealing port 321. Thus, it is in an airtightly sealed state. As a result, a pressure difference is generated in the sealed container 3 such that the inside has a pressure lower than that of the outside atmosphere, and the movable plate portion 31 of the housing 30 receives a force that is pressurized inward by the pressure difference.
- a predetermined pressure for example, about 1 to 100 Pa
- FIG. 11B shows a state in which the internal space 3a in the sealed container 3 is decompressed, and when the internal space 3a is decompressed and the movable plate portion 31 is pressurized inwardly, the deformable portion having flexibility. 313 is deformed so that the protrusion 313a further protrudes inward as shown in the figure, whereby the inner rigid portion 312 strongly contacts the thermoelectric conversion module 4 in addition to the elastic force of the elastic plate 70. Then, the thermoelectric conversion module 4 is uniformly adhered. In other words, it is realized by the deformation of the deforming portion 313 that the contact surface of the inner rigid portion 312 with the thermoelectric conversion module 4 moves so as to be in close and uniform contact with the thermoelectric conversion module 4.
- the inner rigid portion 312 of the movable plate portion 31 that is a heating-side plate member is heated by the elastic force of the elastic plate 70 in a compressed state.
- the conversion module 4 is pressed against and comes into close contact. Since the inner rigid portion 312 is pressed by the elastic plate 70 to be brought into close contact with the thermoelectric conversion module 4 without using a fastening member such as a tie rod or a nut, the inner side with respect to the thermoelectric conversion module 4 is not complicated and expensive.
- the rigid portion 312 can be brought into close contact in a uniform pressure state.
- the member for fastenings such as a bolt and a nut
- the elastic plate 70 can improve the rigidity of the inner rigid portion 312, the deformation of the inner rigid portion 312 can be suppressed, and the inner rigid portion 312 can be easily adhered to the thermoelectric conversion module 4.
- the inner rigid portion 312 is brought into close contact with the thermoelectric conversion module 4 in a pressurized state also by the pressure reducing action in the sealed container 3.
- the inner rigid portion 312 is set to a thickness that does not cause deformation even when pressurized to the thermoelectric conversion module 4 side.
- the deformable portion 313 is the inner rigid portion. It can be deformed following the inward movement of 312. For this reason, it is possible to prevent the inner rigid portion 312 from being deformed, and the inner rigid portion 312 can reliably come into contact with the thermoelectric conversion module 4 on the surface and be in close contact with the thermoelectric conversion module 4.
- the elastic plate 70 accommodated in the cooling jacket 53a of the intermediate cooling part 5A is sandwiched and installed between the inner rigid parts 312 of the adjacent sealed containers 3.
- the elastic plate 70 accommodated in the cooling jacket 53b of the end cooling section 5B is elastically pressed by fixing the cooling case 53B to the housing 30 side. A force can be generated and held, and the elastic force of the elastic plate 70 can be reliably applied to the thermoelectric conversion module 4.
- the elastic plate 70 is joined at one end to the cooling case 53B at the end cooling part 5B and to one side of the inner rigid parts 312 sandwiched between the intermediate cooling part 5A. The other end is in contact with the other side in a non-bonded state. Thereby, the handling of the elastic plate 70 becomes easy and the effect that it is easy to assemble is obtained. Further, when the thermoelectric conversion module 4 and the inner rigid portion 312 are expanded and contracted by heating / cooling, the non-joining side of the elastic plate 70 can be moved relative to the thermoelectric conversion module 4 and the inner rigid portion 312. Therefore, it is difficult to cause a problem such as deformation due to stress caused by heat.
- the internal space 3a in the sealed container 3 is depressurized, the internal space 3a is less likely to be heated than when a gas such as air is present in the internal space 3a at normal pressure. For this reason, generation
- the deformable portion 313 of the movable plate portion 31 can be deformed because the plate thickness is smaller than that of the inner rigid portion 312, and the deformable portion 313 can be easily provided.
- the cooling water that flows in the cooling jackets 53a and 53b contacts the elastic plate 70. Since the temperature of the inner rigid portion 312 is transmitted to the elastic plate 70 and the elastic plate 70 is cooled by the cooling water, a heat dissipation effect by the elastic plate 70 can be obtained. Therefore, it is preferable that the elastic plate 70 is formed in a fin shape as in this embodiment because the cooling effect is improved.
- the elastic plate 70 is not limited to the shape of the above embodiment as long as the inner rigid portion 312 is pressed against the thermoelectric conversion module 4.
- a pair of elastic plates 70 having a V-shaped cross section are arranged in a bilaterally symmetric state, or a ridge section 71 having a ⁇ cross section is formed in parallel as shown in FIG. And an elastic plate 70.
- (a) shows a state before the cooling case 53B of the end cooling part 5B is joined to the outer rigid part 311 of the movable plate part 31, and (b) shows that the cooling case 53B is joined to the outer rigid part 311.
- the inner rigid portion 312 of the movable plate portion 31 is pressed against the thermoelectric conversion module 4 by the elastic plate 70.
- the elastic plate 70 a fin-shaped plate that can obtain a heat radiation effect by contact with cooling water as described above is suitable.
- the third embodiment is characterized in that internal pressure is generated in the cooling jackets 53a and 53b by the cooling water (cooling fluid) supplied into the cooling jackets (cooling chambers) 53a and 53b in the first embodiment. The operation will be described.
- FIG. 15A shows a state before the inside of the sealed container 3 at the end where the end cooling portion 5B is disposed is decompressed, and when the movable plate portion 31 is pressurized to the inside when the pressure is reduced.
- the deformable portion 313 having flexibility is deformed so that the protruding portion 313 a further protrudes inward, whereby the inner rigid portion 312 is brought into contact with the thermoelectric conversion module 4.
- the movement of the abutting surface of the inner rigid portion 312 to the thermoelectric conversion module 4 so as to abut on the thermoelectric conversion module 4 is realized by the deformation of the deforming portion 313.
- FIG. 16 shows a state in which the inside of the sealed container 3 on both sides of the intermediate cooling unit 5A is depressurized, and the protruding portion 313a of the flexible deforming portion 313 is similarly deformed so as to protrude inward. And the inner side rigid part 312 is contact
- the cooling water W is supplied and circulated in the cooling jackets 53 a and 53 b to cool the movable plate portion 31 of the sealed container 3.
- a high-temperature heating fluid H for example, exhaust heat gas generated in a factory or a garbage incinerator or automobile exhaust gas
- H is passed through each flow pipe 35 from one end side to the other end side to heat the flow pipe 35.
- the temperature of the cooled movable plate portion 31 is transmitted to the outer surface side of the thermoelectric conversion module 4, and the outer surface side of the thermoelectric conversion module 4 is cooled, while the temperature of the inner plate portion 36 of the heated flow pipe 35 is heated.
- the inner surface side of the thermoelectric conversion module 4 is heated.
- the heating fluid H does not diffuse by flowing through the hollow portion 351, and the inner plate portion 36 of the flow pipe 35 is efficiently heated. In this way, a temperature difference is given between the outer surface side and the inner surface side of the thermoelectric conversion module 4, whereby the thermoelectric conversion module 4 generates power and electricity is taken out from the terminal 43.
- the amount of the cooling water W supplied into the cooling jackets 53a and 53b of the cooling units 5A and 5B is generated at a certain level (for example, 0.1 to 1 MPa) in the cooling jackets 53a and 53b.
- a certain level for example, 0.1 to 1 MPa
- the inner rigid portion 312 of the movable plate portion 31 is brought into contact with the thermoelectric conversion module 4 in a pressurized state with the internal pressure. It is done. For this reason, the inner side rigid part 312 can be closely_contact
- thermoelectric conversion module 4 the thermal conductivity from the cooling parts 5A and 5B to the thermoelectric conversion module 4 through the inner rigid part 312 of the movable plate part 31 is improved, and the temperature difference given to the thermoelectric conversion module 4 is increased, resulting in power generation performance. Will improve.
- the inner rigid portion 312 is pressed against the thermoelectric conversion module 4 using the cooling water W in the cooling jackets 53a and 53b, the inner rigid portion 312 is not complicated and expensive. Can be adhered to the thermoelectric conversion module 4 in a uniform pressure state. Further, since no fastening members such as bolts and nuts are used, it is possible to contribute to improvement in design and freedom of design and weight reduction.
- the movable plate portion 31 that is a cooling-side plate member includes an inner rigid portion 312 that contacts the thermoelectric conversion module 4 and a deformable portion 313 that has flexibility around it. .
- the portion that is in close contact with the thermoelectric conversion module 4 a rigid portion the thermoelectric conversion module 4 is reliably brought into contact with the surface without deformation, and a uniform pressurization state to the thermoelectric conversion module 4 is obtained. Cheap.
- the inner rigid portion 312 of the movable plate portion 31 is brought into contact with the thermoelectric conversion module 4 in a pressurized state by reducing the pressure in the sealed container 3 in addition to the internal pressure of the cooling jackets 53a and 53b. . Therefore, the adhesion degree of the inner side rigid part 312 with respect to the thermoelectric conversion module 4 can further be raised. Further, since the inside of the sealed container 3 is depressurized, the inside of the sealed container 3 is less likely to be heated than when a gas such as air is present in the internal space 3a at normal pressure, and the internal gas expands and affects the sealed container 3 Or the occurrence of problems such as deterioration of the thermoelectric conversion module 4 due to heating can be suppressed.
- the fourth embodiment is characterized in that the sealed container 3 of the first embodiment is provided with an elastic portion 317 instead of the deformable portion 313.
- the airtight container 3 of 4th Embodiment is demonstrated anew.
- the movable plate portion 31 constituting the housing 30 of the airtight container 3 of the fourth embodiment is an outer rigid portion formed in a rectangular frame shape. 311, an inner rigid portion 312 having the same thickness as the outer rigid portion 311 disposed inside the outer rigid portion 311, and a gap 314 having a constant width formed between the outer rigid portion 311 and the inner rigid portion 312. And an elastic portion 317 that is thinner than the thickness of each of the rigid portions 311 and 312 disposed in a closed state.
- the inner edge 311a of the outer rigid portion 311 is formed in a substantially oval shape
- the outer edge 312a of the inner rigid portion 312 is formed in a substantially oval shape with a certain gap 314 from the inner edge 311a of the outer rigid portion 311.
- An elastic spring plate 316 is joined to the outer surface of the inner rigid portion 312 by joining means such as brazing.
- the spring plate 316 has a size that covers the gap 314 between the rigid portions 311 and 312 and reaches the outer surface of the outer rigid portion 311, and the outer edge portion is joined to the outer surface of the outer rigid portion 311 by brazing or the like. It is joined by means.
- a portion covering the gap 314 of the spring plate 316 constitutes a substantially annular elastic portion 317.
- the elastic portion 317 is provided so as to extend from the outer side of the outer edge 312a of the inner rigid portion 312 to the outer side of the inner edge 311a of the outer rigid portion 311.
- the spring plate 316 In a free state where it is not assembled as a closed container 3 in which is disposed, it is inclined inward. That is, the spring plate 316 is bent inwardly from the outer edge 311 a of the outer rigid portion 311 and extends flat, and is bent so as to be joined to the outer surface of the inner rigid portion 312 at the outer edge 312 a of the inner rigid portion 312. Therefore, the entire movable plate portion 31 of the housing 30 is in a state in which a recess 319 is formed from the elastic portion 317 to the inner rigid portion 312 when the elastic portion 317 is in a free state.
- a plurality of decompression sealing ports 321 are provided in the upper end plate portion 32 of the sealed container 3, and the internal space 3 a in the sealed container 3 is decompressed using these decompression sealing ports 321.
- the edges on both sides in the Z direction of the outer rigid portion 311 are formed in an integrated state with the end plate portion 32. That is, the outer rigid portions 311 on both sides are integrally formed with the pair of upper and lower end plate portions 32, and the inner rigid portion 312 is joined to the outer rigid portions 311 via the spring plates 316 to constitute the housing 30. .
- the inner rigid portion 312 has a size that covers the thermoelectric conversion module 4 and is in contact with the entire surface of one side of the thermoelectric conversion module 4.
- FIG. When the sealed container 3 having the above configuration is assembled with the inner surface of the outer rigid portion 311 of the movable plate portion 31 being joined to the sealing cover 38 with the thermoelectric conversion module 4 disposed therein, FIG. As shown, when the inner surface of the inner rigid portion 312 of the movable plate portion 31 abuts on the thermoelectric conversion module 4 and the elastic portion 317 elastically deforms outward, the recess 319 disappears, and the outer rigid portion 311 and the inner rigid portion The part 312 exists in substantially the same plane, and the elastic part 317 is substantially parallel to the rigid parts 311 and 312.
- the inner rigid portion 312 is in strong contact with the thermoelectric conversion module 4 by the elastic force of the deformed elastic portion 317 and is in close contact with the thermoelectric conversion module 4.
- the rigid portions 311 and 312 are present in the same plane.
- the positional relationship between the rigid portions 311 and 312 is not limited to this, and the spring is moved in a state in which one of them is displaced inward.
- the structure connected with the board 316 may be sufficient.
- the inside air is sucked from the reduced pressure sealing port 321 to reduce the pressure inside the sealed container 3 to a predetermined pressure (for example, about 1 to 100 Pa), and the reduced pressure sealing port 321 is welded to be hermetically sealed. State.
- each cooling unit (intermediate cooling unit 5A and end cooling unit 5B) are the same as those in the first embodiment.
- the inner rigid portion 312 of the movable plate portion 31 of the sealed container 3 is applied to the thermoelectric conversion module 4 by the elastic force of the elastic portion 317 of the spring plate 316. It contacts in a pressed state and is in a state of being in intimate contact. For this reason, the thermal conductivity from the cooling parts 5A and 5B to the thermoelectric conversion module 4 via the inner rigid part 312 is improved, and the temperature difference given to the thermoelectric conversion module 4 is increased, thereby improving the power generation performance.
- the inner rigid portion 312 which is a cooling-side plate member is generated by generating an elastic force in the elastic portion 317 of the movable plate portion 31 without using a fastening member such as a tie rod or a nut as in the prior art. Is adhered to the thermoelectric conversion module 4, and the inner rigid portion 312 can be adhered to the thermoelectric conversion module 4 in a uniform pressure state without being complicated and expensive. Further, since no fastening member such as a bolt and a nut is used, the design and the degree of freedom of design can be improved and the weight can be reduced.
- the inner rigid portion 312 that is brought into close contact with the thermoelectric conversion module 4 in a pressurized state by the elasticity of the elastic portion 317 of the movable plate portion 31 is set to a thickness that does not cause deformation even when pressed to the thermoelectric conversion module 4 side. For this reason, it is possible to prevent the inner rigid portion 312 from being deformed, and the inner rigid portion 312 can reliably come into contact with the thermoelectric conversion module 4 on the surface and be in close contact with the thermoelectric conversion module 4.
- the inside of the sealed container 3 is depressurized, the inside of the sealed container 3 is less likely to be heated than when a gas such as air is present at normal pressure, and the internal gas expands and affects the sealed container 3. Or the occurrence of a problem that the thermoelectric conversion module 4 is heated and deteriorated can be suppressed.
- the spring plate 316 constituting the elastic portion 317 does not cover the entire outer surface of the inner rigid portion 312, but covers the gap 314 between the outer rigid portion 311 and the inner rigid portion 312. It is good also as what was formed in the cyclic
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Abstract
Description
3…密閉容器
31…筐体の可動板部(冷却側の板部材、可動側の板部材)
312…内側剛性部(剛性部)
312b…周縁面
313…変形部
317…弾性部
351…中空部
36…流通管の内板部(加熱側の板部材)
4…熱電変換モジュール
53B…冷却ケース(押圧板)
53a,53b…冷却ジャケット(冷却室)
7…フィン
70…弾性板(弾性部材)
H…加熱流体
W…冷却水(冷却用流体)
[1]第1実施形態
[1-1]熱電変換式発電装置の全体構成
図1~図6は、第1実施形態の熱電変換式発電装置(以下、発電装置)1を示している。この発電装置1は、密閉容器3を有する複数の発電ユニット2が図中Y方向に冷却部5Aを挟んで並列状態で積層され、装置1全体の両側面、すなわちY方向両端部にも冷却部5Bが配設された構成となっている。発電ユニット2の数は任意であり、この場合は4つの発電ユニット2を積層して発電装置1を構成している。
上記密閉容器3の筐体30を構成する可動板部31は、図7に示すように、外形が長方形の枠状に形成された外側剛性部311と、外側剛性部311の内側に配設された外側剛性部311と同じ厚さの内側剛性部312と、外側剛性部311と内側剛性部312との間に形成される一定幅の隙間314を塞ぐ状態に配設された各剛性部311,312の厚さよりも薄い変形部313とを有している。
中間冷却部5Aおよび端部冷却部5Bは、それぞれ冷却ケース53A,53Bを備えている。中間冷却部5Aの冷却ケース53Aは、可動板部31の外側剛性部311の周縁に沿った枠状に形成されており、隣接する外側剛性部311の間に挟まれ、これら外側剛性部311の外面周縁部に接合されている。すなわち本装置1においては、隣接する筐体30は、隣接する外側剛性部311どうしが冷却ケース53Aを介して接合された状態となっている。冷却ケース53Aと、冷却ケース53Aを挟む両側の可動板部31とで囲まれた中間冷却部5Aの内部には、冷却水の流路となって可動板部31を冷却する冷却ジャケット53aが形成されている。
上記構成からなる発電装置1では、各冷却ジャケット53a,53b内に冷却水を供給して流通させ、密閉容器3の可動板部31を冷却する。一方、各流通管35に、一端側から他端側に向けて高温の加熱流体Hを流して流通管35を加熱する。冷却された可動板部31の温度は熱電変換モジュール4の外面側に伝わり、熱電変換モジュール4の外面側が冷却され、一方、加熱された流通管35の内板部36の温度は熱電変換モジュール4の内面側に伝わり、熱電変換モジュール4の内面側が加熱される。加熱流体Hは中空部351を流れることで拡散せず、流通管35の内板部36が効率よく加熱される。
本実施形態の発電装置1では、密閉容器3内を減圧して密閉容器3の内外に圧力差を生じさせることにより、減圧しない状態では単に熱電変換モジュール4に当接する状態である可動板部31の内側剛性部312が、熱電変換モジュール4に対し加圧された状態で当接し、均一に密着した状態となる。可動板部31を、熱電変換モジュール4に当接する内側剛性部312と、その周囲の可撓性を有する変形部313とを有する構成とすることにより、減圧状態において変形部313が変形し、内側剛性部312が熱電変換モジュール4に均一に当接しやすくなる。このため、可動板部31の内側剛性部312を介しての冷却部5A,5Bから熱電変換モジュール4への熱伝導度は向上し、熱電変換モジュール4に与えられる温度差が大きくなって発電性能が向上する。
図9に示すように、可動板部31の内側剛性部312の周縁面312bを、外側から内側(図9で、熱電変換モジュール4側とは反対側の上側から、熱電変換モジュール4側の下側)に向かうにしたがって、側方に傾斜して突出する略テーパ状に形成する。この形態によれば、減圧作用で内側に変形する変形部313が内側剛性部312の周縁面312bと外面との角部に干渉しにくくなり、変形部313に折れや亀裂といった損傷が生じにくくなる。なお、図示例ではテーパ状の周縁面312bは平坦面であるが、必要に応じて、外側から内側に向かうにしたがって凹状曲面もしくは凸状曲面等に形成される場合もある。
次に、図11~図14を参照して本発明の第2実施形態を説明する。
第2実施形態においては、上記第1実施形態のフィン7に代えて、弾性板(弾性部材)70が設けられている。
上記第2実施形態によれば、加熱側の板部材である可動板部31の内側剛性部312が圧縮状態の弾性板70の弾発力によって熱電変換モジュール4に対して加圧されて当接し、密着する。タイロッドやナットといった締結用の部材を用いず、弾性板70によって内側剛性部312を加圧して熱電変換モジュール4に対し密着させるため、複雑かつ高コストになることなく熱電変換モジュール4に対して内側剛性部312を均一な加圧状態で密着させることができる。そして、ボルト・ナットといった締結用の部材を用いないため、設計やデザインの自由度の向上や軽量化に寄与することができる。また、弾性板70により内側剛性部312の剛性を向上させることが可能であり、内側剛性部312の変形が抑えられ、内側剛性部312を熱電変換モジュール4に密着させやすくすることができる。
弾性板70は内側剛性部312を熱電変換モジュール4に加圧するものであれば、上記実施形態の形状に限定されない。例えば、図13に示すように断面V字状の一対の弾性板70を左右対称の状態に配設したものや、図14に示すように断面Ω状の凸条部71が並列して形成された弾性板70などが挙げられる。これら図は、いずれも(a)が端部冷却部5Bの冷却ケース53Bを可動板部31の外側剛性部311に接合する前の状態、(b)が冷却ケース53Bを外側剛性部311に接合して弾性板70により可動板部31の内側剛性部312が熱電変換モジュール4に加圧されている状態を示している。弾性板70としては、上記のように冷却水が接触して放熱効果を得ることができるフィン形状のものが好適とされる。
次に、図15および図16を参照して本発明の第3実施形態を説明する。第3実施形態では、上記第1実施形態における冷却ジャケット(冷却室)53a,53b内に供給する冷却水(冷却用流体)により冷却ジャケット53a,53bに内圧を生じさせることを特徴としており、以下、その作用を説明する。
次に、図17~図19を参照して本発明の第4実施形態を説明する。
第4実施形態では、上記第1実施形態の密閉容器3において、変形部313に代えて弾性部317を設けたことを特徴としている。以下、改めて第4実施形態の密閉容器3を説明する。
図17に示すように、第4実施形態の密閉容器3の筐体30を構成する可動板部31は、外形が長方形の枠状に形成された外側剛性部311と、外側剛性部311の内側に配設された外側剛性部311と同じ厚さの内側剛性部312と、外側剛性部311と内側剛性部312との間に形成される一定幅の隙間314を塞ぐ状態に配設された各剛性部311,312の厚さよりも薄い弾性部317とを有している。
本実施形態においては、密閉容器3の可動板部31の内側剛性部312が、バネ板316の弾性部317の弾発力によって熱電変換モジュール4に対し加圧された状態で当接し、均一に密着した状態となる。このため、内側剛性部312を介しての冷却部5A,5Bから熱電変換モジュール4への熱伝導度は向上し、熱電変換モジュール4に与えられる温度差が大きくなって発電性能が向上する。
Claims (14)
- 加熱側の板部材と冷却側の板部材とを備えた密閉容器と、
前記加熱側の板部材と前記冷却側の板部材との間に配設した状態で、前記密閉容器内に配設される熱電変換モジュールとを備え、
前記加熱側の板部材が加熱されるとともに前記冷却側の板部材が冷却されて前記熱電変換モジュールに温度差が与えられることにより、該熱電変換モジュールが発電する熱電変換式発電装置であって、
前記加熱側の板部材および前記冷却側の板部材のうちの少なくとも一方の板部材が、前記密閉容器内が減圧状態とされて発生する該密閉容器の内外の圧力差によって前記熱電変換モジュールに加圧状態で当接される可動側の板部材とされ、
該可動側の板部材は、剛性を有し前記熱電変換モジュールに当接させられる剛性部と、この剛性部に連なって形成され、前記圧力差によって変形し、該変形により前記剛性部を前記熱電変換モジュールに当接させる変形部と、を有することを特徴とする熱電変換式発電装置。 - 前記変形部は前記剛性部よりも板厚が小さいことにより前記圧力差によって変形可能となっていることを特徴とする請求項1に記載の熱電変換式発電装置。
- 前記冷却側の板部材が前記可動側の板部材とされ、前記剛性部に、冷却促進用のフィンが設けられていることを特徴とする請求項1または2に記載の熱電変換式発電装置。
- 前記変形部が、前記剛性部の周縁面における前記熱電変換モジュール側とは反対側の外側から側方に延びる状態に設けられており、該剛性部の周縁面は、前記外側から前記熱電変換モジュール側である内側に向かうにしたがって、側方に突出する略テーパ状に形成されていることを特徴とする請求項1~3のいずれかに記載の熱電変換式発電装置。
- 前記密閉容器は、前記加熱側の板部材で囲繞される中空部を有し、該中空部の周囲に前記熱電変換モジュールが配設され、該熱電変換モジュールの外側に前記冷却側の板部材が配設され、
前記中空部に加熱流体が流通されて前記加熱側の板部材が加熱されることを特徴とする請求項1~4のいずれかに記載の熱電変換式発電装置。 - 前記熱電変換モジュールは、前記剛性部と非接合状態であることを特徴とする請求項1~5のいずれかに記載の熱電変換式発電装置。
- 前記変形部は、弾性変形して前記剛性部を弾性的に前記熱電変換モジュール側に加圧して当接させる弾性部であることを特徴とする請求項1に記載の熱電変換式発電装置。
- 前記加熱側の板部材および前記冷却側の板部材のうちの少なくとも一方の板部材を、前記熱電変換モジュールに加圧して当接させる弾性部材を有することを特徴とする請求項1に記載の熱電変換式発電装置。
- 前記弾性部材によって前記熱電変換モジュールに加圧されて当接する前記板部材の外面側に押圧板が配設され、該押圧板と該板部材との間に該弾性部材が挟持されていることを特徴とする請求項8に記載の熱電変換式発電装置。
- 前記弾性部材は、前記板部材もしくは前記押圧板のいずれか一方に接合されており、他方側には非接合状態であることを特徴とする請求項9に記載の熱電変換式発電装置。
- 前記板部材は冷却側の板部材であり、該板部材と前記押圧板との間に冷却媒体が流され、該冷却媒体が前記弾性部材に接触することを特徴とする請求項8~10のいずれかに記載の熱電変換式発電装置。
- 前記弾性部材は、冷却促進用のフィン形状に形成されていることを特徴とする請求項11に記載の熱電変換式発電装置。
- 前記弾性部材は、断面が波形、V型、U型、Ω型等のフィン形状に形成されていることを特徴とする請求項12に記載の熱電変換式発電装置。
- 前記可動側の板部材は前記冷却側の板部材とされ、
かつ、冷却用流体が供給され、前記冷却側の板部材に該冷却用流体を接触させる冷却室を備え、
前記冷却用流体によって前記冷却室内に生じる内圧で前記冷却側の板部材の前記剛性部が前記熱電変換モジュールに加圧状態で当接させられることを特徴とする請求項1に記載の熱電変換式発電装置。
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DE112018003950T5 (de) * | 2017-08-02 | 2020-05-07 | Ngk Insulators, Ltd., | Wärmerückgewinnungsvorrichtung und wärmerückgewinnungssystem |
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