THERMOELECTRIC GENERATOR

Abstract

Thermoelectric generator (1), comprising: a heat absorption section (2); a heat dissipation section (3); a thermoelectric generating module (5) arranged between the heat absorption section (2) and the heat emission section (3) and having a first end surface in contact with the heat absorption section (2) or the heat emission section (3); and a first heat transfer element (13) arranged between the heat absorption section (2) and the heat emission section (3) and comprising a first connecting section (11) which is in contact with a second end surface of the thermoelectric generating module (5); an elastic section (15) arranged between the first heat transfer element (13) and at least one of the heat absorption section (2) and the heat emission section (3); and a second heat transfer element (14) comprising a second connecting section (12) configured to be connected at one end to at least one of the heat absorption section (2) and the heat emission section (3) and guiding the first heat transfer element (13) on both sides in a direction orthogonal to the heat absorption section (2) and the heat emission section (3), while at least one region of the second heat transfer element (14) is in contact with the first heat transfer element (13) along the orthogonal direction, wherein a lubricant with a heat transfer property is provided between an inner circumferential surface of the second heat transfer element (14) and an outer circumferential surface of the first heat transfer element (13).

Description

[0001] The present invention relates to a thermoelectric generator.

[0002] Thermoelectric generators are known that contain thermoelectric generating modules which generate electrical power by utilizing the Seebeck effect. Each of the thermoelectric generating modules generates electrical power through a temperature difference applied between one end surface and the other end surface of the thermoelectric generating module.

[0003] The prior art includes the following publications: JP 2016 – 157 356 A, DE 20 2012 012 536 U1, JP 2013 - 004 837 A, DE 10 2007 056 150 A1. DE 20 2012 012 536 U1 discloses a thermoelectric generator with a heat absorption section, a heat emission section, a thermoelectric generating module arranged between the heat absorption section and the heat emission section, a heat transfer element and an elastic section. Summary of the invention: Technical problem

[0004] In some cases, a heat transfer element is connected to the thermoelectric generating module for heat transfer. If the heat transfer element becomes thermally deformed, excessive external force can be exerted on the thermoelectric generating module, or the thermoelectric generating module and the heat transfer element can separate. As a result, the performance of the thermoelectric generator can deteriorate.

[0005] The object of the present invention is to suppress a deterioration in the performance of a thermoelectric generator. Solution to the problem

[0006] According to the present invention, a thermoelectric generator comprises: a heat absorption section; a heat emission section; a thermoelectric generating module arranged between the heat absorption section and the heat emission section, having a first end surface in contact with the heat absorption section or the heat emission section; a first heat transfer element arranged between the heat absorption section and the heat emission section, comprising a first connecting section in contact with a second end surface of the thermoelectric generating module; and an elastic section arranged between the first heat transfer element and at least one of the heat absorption section and the heat emission section.and a second heat transfer element comprising a second connecting section configured to be connected at one end to at least one of the heat absorption section and the heat emission section, and guiding the first heat transfer element on both sides in a direction orthogonal to the heat absorption section and the heat emission section, while at least one region of the second heat transfer element is in contact with the first heat transfer element along the orthogonal direction, wherein a lubricant having a heat transfer property is provided between an inner circumferential surface of the second heat transfer element and an outer circumferential surface of the first heat transfer element.

[0007] Preferred embodiments are defined in dependent claims 2 to 10. Advantageous effects of the invention

[0008] According to the present invention, a deterioration in the performance of the thermoelectric generator is suppressed. Brief description of the drawings Fig. Figure 1 is a cross-sectional view illustrating a thermoelectric generator according to a first embodiment. Fig. Figure 2 is an enlarged cross-sectional view of a part of the thermoelectric generator according to the first embodiment. Fig. Figure 3 is a perspective view that schematically illustrates a thermoelectric generating module according to the first embodiment. Fig. Figure 4 is a schematic view illustrating an example of a heat transfer mechanism according to the first embodiment. Fig. Figure 5 is a schematic view illustrating an example of a heat transfer mechanism according to a second embodiment. Fig. Figure 6 is a schematic view illustrating an example of a heat transfer mechanism according to a third embodiment. Fig. Figure 7 is a schematic view illustrating an example of a heat transfer mechanism according to a fourth embodiment. Fig. Figure 8 is a schematic view illustrating an example of a heat transfer mechanism according to a fifth embodiment. Fig. Figure 9 is a schematic view illustrating an example of a heat transfer mechanism according to a sixth embodiment. Description of the embodiments

[0009] Embodiments according to the present invention are described below with reference to the drawings. Component elements according to the embodiments described below can be combined with one another in a suitable manner. Furthermore, some of the component elements may not be used in certain cases.

[0010] In the following description, an orthogonal XYZ coordinate system is defined, and positional relationships between sections are described with reference to this orthogonal XYZ coordinate system. A direction parallel to an X-axis in a predetermined plane is represented as the X-axis direction; a direction parallel to a Y-axis orthogonal to the X-axis in the predetermined plane is represented as the Y-axis direction; and a direction parallel to a Z-axis orthogonal to the predetermined plane is represented as the Z-axis direction. An XY plane encompassing both the X- and Y-axes is parallel to the predetermined plane. [First embodiment]<Thermoelektrischer Generator>

[0011] A first embodiment is described. Fig. Figure 1 is a cross-sectional view illustrating an example of a thermoelectric generator 1 according to the present embodiment. Fig. Figure 2 is an enlarged cross-sectional view of a section of the thermoelectric generator 1 according to the present embodiment. As shown in the Fig. 1 and Fig. As shown in Figure 2, the thermoelectric generator 1 comprises a heat absorption section 2, a heat emission section 3, a circumferential wall element 4 arranged between the circumferential edge section of the heat absorption section 2 and the circumferential edge section of the heat emission section 3, a thermoelectric generating module 5 arranged between the heat absorption section 2 and the heat emission section 3, a plurality of electronic components 6 configured to be driven by the electrical power generated by the thermoelectric generating module 5, and a substrate 7 configured to support at least some of the electronic components.

[0012] Furthermore, the thermoelectric generator 1 includes a heat transfer mechanism 10 which is configured to be at least partially connected to the thermoelectric generating module 5.

[0013] The heat absorption section 2 is installed on object B. The heat absorption section 2 is a plate-shaped element. The heat absorption section 2 is made of a metallic material, such as aluminum or copper. Object B acts as a heat source. The heat absorption section 2 absorbs heat from object B. The heat from the heat absorption section 2 is transferred to the thermoelectric generating module 5 via the heat transfer mechanism 10.

[0014] The heat dissipation section 3 is located opposite the heat absorption section 2, with a space between them. The heat dissipation section 3 is a plate-shaped element. The heat dissipation section 3 is made of a metallic material such as aluminum or copper. The heat dissipation section 3 absorbs heat from the thermoelectric generating module 5. The heat from the heat dissipation section 3 is released into an ambient air space surrounding the thermoelectric generator 1.

[0015] The heat absorption section 2 has a heat absorption surface 2A facing a surface of object B and an inner surface 2B facing in the opposite direction to heat absorption surface 2A. Heat absorption surface 2A faces in a -Z direction. Inner surface 2B faces in a +Z direction. Both heat absorption surface 2A and inner surface 2B are flat. Both heat absorption surface 2A and inner surface 2B are parallel to the XY plane. In the XY plane, the outer shape of heat absorption section 2 is essentially quadrilateral.

[0016] The heat dissipation section 3 has a heat dissipation surface 3A facing the ambient air space and an inner surface 3B facing in the opposite direction to heat dissipation surface 3A. Heat dissipation surface 3A faces in the +Z direction. Inner surface 3B faces in the -Z direction. Both heat dissipation surface 3A and inner surface 3B are flat. Both heat dissipation surface 3A and inner surface 3B are parallel to the XY plane. In the XY plane, the outer shape of heat dissipation section 3 is essentially quadrilateral.

[0017] In the XY plane, the outer shape and dimensions of heat absorption section 2 and the outer shape and dimensions of heat emission section 3 are essentially the same.

[0018] The peripheral wall element 4 is arranged between the peripheral edge section of the inner surface 2B of the heat absorption section 2 and the peripheral edge section of the inner surface 3B of the heat emission section 3.

[0019] The peripheral wall element 4 connects the heat absorption section 2 and the heat emission section 3. The peripheral wall element 4 is made of a synthetic resin.

[0020] In the XY plane, the peripheral wall element 4 has an annular shape. The outer shape of the peripheral wall element 4 in the XY plane is essentially quadrilateral. The heat absorption section 2, the heat emission section 3, and the peripheral wall element 4 define an interior space 8 of the thermoelectric generator 1. The peripheral wall element 4 has an interior surface 4B facing the interior space 8. The interior surface 2B of the heat absorption section 2 faces the interior space 8. The interior surface 3B of the heat emission section 3 faces the interior space 8. The ambient air space around the thermoelectric generator 1 is an exterior space of the thermoelectric generator 1.

[0021] A sealing element 9A is arranged between the circumferential edge section of the inner surface 2B of the heat-absorbing section 2 and an end surface on the -Z side of the circumferential wall element 4. A sealing element 9B is arranged between the circumferential edge section of the inner surface 3B of the heat-dissipating section 3 and an end surface on the +Z side of the circumferential wall element 4. Each of the sealing elements 9A and 9B comprises, for example, an O-ring. The sealing element 9A is arranged in a recess 2BT provided on the circumferential edge section of the inner surface 2B. The sealing element 9B is arranged in a recess 3BT provided on the circumferential edge section of the inner surface 3B. The sealing elements 9A and 9B prevent foreign bodies from entering the interior 8 of the thermoelectric generator 1.

[0022] The thermoelectric generating module 5 utilizes the Seebeck effect to generate electrical power. An end surface 51 on the -Z side of the thermoelectric generating module 5 is heated to apply a temperature difference between the end surface 51 on the -Z side and an end surface 52 on the +Z side of the thermoelectric generating module 5, thereby generating electrical power.

[0023] End face 51 points in the -Z direction. End face 52 points in the +Z direction. Each end face 51 and end face 52 has a flat shape. Each end face 51 and end face 52 is parallel to the XY plane. In the XY plane, the outer shape of the thermoelectric generating module 5 is essentially rectangular.

[0024] The end surface 52 faces the inner surface 3B of the heat dissipation section 3. A recess 3BU is formed in the inner surface 3B of the heat dissipation section 3. At least part of the thermoelectric generating module 5 is arranged in the recess 3BU. The thermoelectric generating module 5 is attached to the heat dissipation section 3. The heat dissipation section 3 and the thermoelectric generating module 5 are connected to each other, for example, by an adhesive.

[0025] Fig. Figure 3 is a perspective view schematically illustrating the thermoelectric generating module 5 according to the present embodiment. The thermoelectric generating module 5 comprises thermoelectric P-type semiconductor devices 5P, thermoelectric N-type semiconductor devices 5N, first electrodes 53, second electrodes 54, a first substrate 51S, and a second substrate 52S. In the XY plane, the thermoelectric P-type semiconductor devices 5P and the thermoelectric N-type semiconductor devices 5N are arranged alternately. Each of the first electrodes 53 is connected to each of the thermoelectric P-type semiconductor devices 5P and the thermoelectric N-type semiconductor devices 5N. Each of the second electrodes 54 is connected to each of the thermoelectric P-type semiconductor devices 5P and the thermoelectric N-type semiconductor devices 5N.A lower surface of the thermoelectric P-type semiconductor device 5P and a lower surface of the thermoelectric N-type semiconductor device 5N are connected to the first electrode 53. An upper surface of the thermoelectric P-type semiconductor device 5P and an upper surface of the thermoelectric N-type semiconductor device 5N are connected to the second electrode 54. The first electrode 53 is connected to the first substrate 51S. The second electrode 54 is connected to the second substrate 52S.

[0026] Each of the thermoelectric P-type semiconductor device 5P and the thermoelectric N-type semiconductor device 5N, for example, comprises a BiTe-based thermoelectric material. Each of the first substrates 51S and second substrates 52S is made of an electrically insulating material such as ceramic or polyimide.

[0027] The first substrate 51S has end face 51. The second substrate 52S has end face 52. In response to the heating of the first substrate 51S, a temperature difference is applied between the end sections on the +Z-side and the -Z-side of each thermoelectric P-type semiconductor device 5P and the thermoelectric N-type semiconductor device 5N. In response to the application of the temperature difference between the end sections on the +Z-side and the -Z-side of the thermoelectric P-type semiconductor device 5P, holes move in the thermoelectric P-type semiconductor device 5P. In response to the application of the temperature difference between the end sections on the +Z-side and the -Z-side of the thermoelectric N-type semiconductor device 5N, electrons move in the thermoelectric N-type semiconductor device 5N.The thermoelectric P-type semiconductor assembly 5P and the thermoelectric N-type semiconductor assembly 5N are connected via the first electrode 53 and the second electrode 54. A potential difference is generated between the first electrode 53 and the second electrode 54 by holes and electrons. The thermoelectric generating module 5 generates an electric current due to this potential difference between the first electrode 53 and the second electrode 54. A connecting line 55 is connected to the first electrode 53. The thermoelectric generating module 5 delivers electrical power via the connecting line 55.

[0028] The electronic components 6 are each driven by electrical energy generated by the thermoelectric generator 5. The thermoelectric generator 1 comprises the multitude of electronic components 6. At least some of the electronic components 6 are arranged in the interior 8.

[0029] In the present embodiment, the electronic components 6 include a sensor 6A and a transmitter 6B configured to transmit acquisition data from the sensor 6A. Furthermore, the electronic components 6 include an amplifier 6C configured to amplify the acquisition data from the sensor 6A, and a microcomputer 6D configured to control the sensor 6A, the transmitter 6B, and the amplifier 6C.

[0030] Substrate 7 comprises a control board designed to support at least some of the electronic components 6. Substrate 7 is located within the interior 8. Substrate 7 is connected to heat absorption section 2 via a support element 7A. Substrate 7 is connected to heat dissipation section 3 via a support element 7B. Substrate 7 is supported by support elements 7A and 7B to isolate it from both heat absorption section 2 and heat dissipation section 3.

[0031] The sensor 6A comprises, for example, a temperature sensor. In the present embodiment, three sensors 6A are arranged. The sensors 6A are each arranged at the heat absorption section 2, the heat emission section 3, and the substrate 7. The detection data from each of the sensors 6A are amplified by the amplifier 6C and then transmitted by the transmitter 6B to a control device located outside the thermoelectric generator 1. <Wärmeübertragungsmechanismus>

[0032] Fig. Figure 4 is a schematic view illustrating an example of the heat transfer mechanism 10 according to the present embodiment. The heat transfer mechanism 10 receives heat from the heat absorption section 2 and transfers the heat to the thermoelectric generating module 5.

[0033] As in the Fig. 1, Fig. 2 and Fig. As shown in Figure 4, the heat transfer mechanism 10 comprises a first connecting section 11, which is configured for connection with the thermoelectric generating module 5, and a second connecting section 12, which is configured for connection with the heat absorption section 2. At least a part of the heat transfer mechanism 10 is elastically deformed. At least a part of the heat transfer mechanism 10 is arranged in the interior 8.

[0034] In the present embodiment, the heat transfer mechanism 10 comprises a first heat transfer element 13, which includes the first connecting section 11, an elastic section 15, which is arranged between the first heat transfer element 13 and the heat absorption section 2, and a second heat transfer element 14, which includes the second connecting section 12 and is configured to guide the first heat transfer element 13.

[0035] The first heat transfer element 13 is made of a metallic material such as aluminum or copper. The first heat transfer element 13 is a rod-shaped element that extends in the Z-axis direction. In the present embodiment, the first heat transfer element 13 is a column-shaped element.

[0036] The first connecting section 11 comprises an end section on the +Z side of the first heat transfer element 13. The first heat transfer element 13 is connected to the end surface 51 of the thermoelectric generating module 5. In the present embodiment, the first connecting section 11 is connected to the end surface 51 of the thermoelectric generating module 5 via a heat transfer plate 16. The heat transfer plate 16 is flexible. The heat transfer plate 16 is, for example, made of carbon. Fig. 4 The illustration of the heat transfer plate 16 is omitted.

[0037] The second heat transfer element 14 is made of a metallic material such as aluminum or copper. The second heat transfer element 14 is a cylindrical element arranged around the first heat transfer element 13. In the present embodiment, the second heat transfer element 14 is a cylindrical element.

[0038] The second connecting section 12 includes an end section on the -Z side of the second heat transfer element 14. The second heat transfer element 14 is rigidly connected to the heat absorption section 2. The first heat transfer element 13 is movable in the Z-axis direction. The second heat transfer element 14 guides the first heat transfer element 13 in the Z-axis direction.

[0039] The elastic section 15 deforms elastically in the Z-axis direction. In the present embodiment, the elastic section 15 comprises an elastic element, such as a helical spring. The elastic section 15 is arranged between an end section on the -Z-side of the first heat transfer element 13 and the inner surface 2B of the heat absorption section 2. An end section on the +Z-side of the elastic section 15 is connected to the end section on the -Z-side of the first heat transfer element 13. As shown in Fig. 1 and Fig. As shown in Figure 2, a recess 2BU is formed in the inner surface 2B of the heat absorption section 2. At least part of the elastic section 15 is arranged in the recess 2BU. An end section on the -Z side of the elastic section 15 is connected to a bottom surface of the recess 2BU.

[0040] The elastic section 15 is compressed and positioned between the first heat transfer element 13 and the heat absorption section 2. The elastic section 15 is positioned between the first heat transfer element 13 and the heat absorption section 2 and generates an elastic force that moves the first heat transfer element 13 in the +Z direction.

[0041] When the first heat transfer element 13 is thermally deformed in a Z-axis direction, the elastic section 15 expands and contracts in the Z-axis direction. For example, if the first heat transfer element 13 is thermally deformed so that it expands in a Z-axis direction, the elastic section 15 contracts in the Z-axis direction. Conversely, if the first heat transfer element 13 is thermally deformed so that it contracts in the Z-axis direction, the elastic section 15 expands in the Z-axis direction. The second heat transfer element 14 guides the first heat transfer element 13, which is thermally deformed in the Z-axis direction.

[0042] The first heat transfer element 13 and at least a portion of the second heat transfer element 14 are in contact with each other. In the present embodiment, the outer circumferential surface of the first heat transfer element 13 and at least a portion of the inner circumferential surface of the second heat transfer element 14 come into contact. The first heat transfer element 13 moves in the Z-axis direction while it comes into contact with the inner circumferential surface of the second heat transfer element 14. The contact between the outer circumferential surface of the first heat transfer element 13 and the inner circumferential surface of the second heat transfer element 14 enables sufficient heat transfer between the first heat transfer element 13 and the second heat transfer element 14.Additionally, a lubricant with heat transfer properties, such as thermally conductive grease, can be provided between the outer circumferential surface of the first heat transfer element 13 and the inner circumferential surface of the second heat transfer element 14. < Company>

[0043] Next, an example of the operation of the thermoelectric generator 1 according to the present embodiment is described. The thermoelectric generator 1 is installed on object B, which is located in an industrial plant, such as a factory. Object B comprises a device or machine installed in the industrial plant. In a case where the sensor 6A of the thermoelectric generator 1 is a temperature sensor, the thermoelectric generator 1 detects the temperature of object B using sensor 6A.

[0044] Object B generates heat. The heat from object B is transferred to the thermoelectric generating module 5 via the heat absorption section 2 and the heat transfer mechanism 10. The second connecting section 12 of the second heat transfer element 14 makes contact with the heat absorption section 2. The second heat transfer element 14 and the first heat transfer element 13 are in contact with each other.

[0045] The first connecting section 11 of the first heat transfer element 13 is in contact with the thermoelectric generating module 5. Therefore, sufficient heat from object B is transferred to the thermoelectric generating module 5 via the heat absorption section 2, the first heat transfer element 13 and the second heat transfer element 14.

[0046] The thermoelectric generating module 5, which has absorbed heat, generates electrical power. The electronic components 6 are each driven by the electrical power generated by the thermoelectric generating module 5. As described above, in the present embodiment, the electronic components 6 comprise the sensor 6A, the transmitter 6B, the amplifier 6C, and the microcomputer 6D. The sensor 6A detects the temperature of object B. The microcomputer 6D amplifies the detection data from sensor 6A via the amplifier 6C and then transmits the detection data via the transmitter 6B to the control device in the industrial plant, which is located outside the thermoelectric generator 1. The thermoelectric generator 1 is installed on each of a plurality of objects B in the industrial plant.The management device is set up to monitor and manage the states of the multitude of objects B based on the acquisition data transmitted by the multitude of thermoelectric generators 1.

[0047] The heat from object B will likely cause at least part of the heat transfer mechanism 10 to deform thermally in a Z-axis direction. For example, if the first heat transfer element 13 is thermally deformed in a Z-axis direction, excessive external force may be exerted on the thermoelectric generating module 5, or the thermoelectric generating module 5 may separate from the first heat transfer element 13. If the first heat transfer element 13 is thermally deformed in such a way that it expands in the Z-axis direction, the thermoelectric generating module 5 may be squeezed between the first heat transfer element 13 and the heat dissipation section 3, thereby exerting excessive external force on the thermoelectric generating module 5.If the first heat transfer element 13 is thermally deformed, causing it to contract in the Z-axis direction, the thermoelectric generating module 5 can be separated from the first heat transfer element 13, resulting in insufficient heat transfer between the thermoelectric generating module 5 and the heat absorption section 2.

[0048] In the present embodiment, at least part of the heat transfer mechanism 10 is elastically deformed to maintain the distance between the first connecting section 11 and the inner surface 3B of the heat dissipation section 3 in a Z-axis direction. This configuration thus prevents excessive external force from being exerted on the thermoelectric generating module 5 and prevents the thermoelectric generating module 5 from separating from the heat transfer mechanism 10.

[0049] When the first heat transfer element 13 is thermally deformed, causing it to expand in a Z-axis direction, the elastic section 15 is elastically deformed, causing it to contract in the Z-axis direction. The second heat transfer element 14 guides the first heat transfer element 13, which is thermally deformed to expand in the Z-axis direction. When the elastic section 15 is elastically deformed to contract in the Z-axis direction, the position of the end section on the -Z-side of the first heat transfer element 13 changes in the Z-axis direction, but a change in the distance in the Z-axis direction between the inner surface 3B of the heat dissipation section 3 and the first connecting section 11, which is the end section on the +Z-side of the first heat transfer element 13, is suppressed.

[0050] When the first heat transfer element 13 is thermally deformed, causing it to contract in the Z-axis direction, the elastic section 15 is also elastically deformed, causing it to expand in the Z-axis direction. The elastic section 15 is compressed and positioned between the first heat transfer element 13 and the heat absorption section 2. The thermal deformation of the first heat transfer element 13 in the Z-axis direction allows the elastic section 15 to thermally deform and expand in the Z-axis direction. The second heat transfer element 14 guides the first heat transfer element 13, which is thermally deformed, causing it to contract in the Z-axis direction.When the elastic section 15 is elastically deformed so that it expands in the Z-axis direction, the position of the end section on the -Z-side of the first heat transfer element 13 is changed in the Z-axis direction, but a change in the distance in the Z-axis direction between the inner surface 3B of the heat dissipation section 3 and the first connecting section 11, which is the end section on the +Z-side of the first heat transfer element 13, is suppressed.

[0051] In this way, the elastic section 15, which is elastically deformable in a Z-axis direction, is provided, and thus, even if the first heat transfer element 13 is thermally deformed in a Z-axis direction, a change in the distance between the inner surface 3B of the heat dissipation section 3 and the first connection section 11 of the first heat transfer element 13 in the Z-axis direction is suppressed. Thus, an excessive external force acting on the thermoelectric generating module 5 or a separation of the end surface 51 of the thermoelectric generating module 5 from the first connection section 11 of the first heat transfer element 13 is suppressed. <wirkungen>

[0052] As described above, in the present embodiment, the heat transfer mechanism 10 comprises the first connecting section 11, which is configured to be connected to the thermoelectric generating module 5, and the second connecting section 12, which is configured to be connected to the heat absorption section 2. This configuration transfers the heat from the heat absorption section 2 sufficiently to the thermoelectric generating module 5 via the heat transfer mechanism 10. Therefore, a sufficient temperature difference is established between the end surface 51 and the end surface 52 of the thermoelectric generating module 5. Thus, the thermoelectric generator 1 is configured to generate sufficient electrical power.

[0053] In a case where the first heat transfer element 13 is connected to the thermoelectric generating module 5 to transfer heat to the thermoelectric generating module 5, it is likely that the first heat transfer element 13 will thermally deform. In the present embodiment, the heat transfer mechanism 10 has an elastic section 15 that is elastically deformable. Therefore, the elastic section 15 deforms elastically even when the first heat transfer element 13 is thermally deformed, thus suppressing excessive external force exerted on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13. Therefore, a deterioration in the performance of the thermoelectric generator 1 is prevented.

[0054] The perimeter wall element 4 is made of a synthetic resin. The peripheral wall element 4 has thermally insulating properties. Therefore, the transfer of heat from the heat absorption section 2 to the heat emission section 3 via the peripheral wall element 4 is suppressed. The heat from the heat absorption section 2 is transferred exclusively to the thermoelectric generating module 5 via the heat transfer mechanism 10 provided in the interior 8. This configuration suppresses the loss of heat transferred from the heat absorption section 2 to the thermoelectric generating module 5.

[0055] The first heat transfer element 13 is made of a metal, such as aluminum or copper, and the peripheral wall element 4 is made of a synthetic resin. The coefficient of thermal expansion of the peripheral wall element 4 is greater than that of the first heat transfer element 13. Therefore, thermal deformation of the peripheral wall element 4 in the Z-axis direction can change the distance between the heat-absorbing section 2 and the heat-discharging section 3 in the Z-axis direction. In the present embodiment, the first heat transfer element 13 is supported by the elastic section 15, and thus, even if the distance between the heat-absorbing section 2 and the heat-discharging section 3 changes in a Z-axis direction, a change in the distance between the inner surface 3B of the heat-discharging section 3 and the first connecting section 11 of the first heat transfer element 13 in the Z-axis direction is suppressed.Therefore, an excessive external force exerted on the thermoelectric generating module 5, which is arranged between the heat dissipation section 3 and the first heat transfer element 13, or a separation of the thermoelectric generating module 5 from the first heat transfer element 13 is suppressed.

[0056] The first heat transfer element 13 is guided by the second heat transfer element 14. The second heat transfer element 14 guides the first heat transfer element 13 in a specific direction in which the first heat transfer element 13 is thermally deformed. In the present embodiment, the direction in which the first heat transfer element 13 is thermally deformed is a Z-axis direction. The direction of guidance by the second heat transfer element 14 is also the Z-axis direction. Therefore, the first heat transfer element 13 is designed to move smoothly in the Z-axis direction.

[0057] The first heat transfer element 13 and at least part of the second heat transfer element 14 are in contact with each other. Therefore, sufficient heat from object B is transferred to the thermoelectric generating module 5 via the heat absorption section 2, the first heat transfer element 13, and the second heat transfer element 14.

[0058] The first connecting section 11 is connected to the thermoelectric generating module 5 via the heat transfer plate 16, which exhibits flexibility. In this configuration, the heat transfer plate 16 suppresses the application of a local external force to the thermoelectric generating module 5, even if the first heat transfer element 13 is thermally deformed, for example, in a direction inclined to the Z-axis.

[0059] At least part of the heat transfer mechanism 10 is located within the interior space 8, which is defined by the heat absorption section 2, the heat emission section 3, and the peripheral wall element 4. Therefore, the heat transfer mechanism 10 is protected by the heat absorption section 2, the heat emission section 3, and the peripheral wall element 4. The heat transfer mechanism 10, located within the interior space 8, prevents foreign bodies from adhering to it. Consequently, the first heat transfer element 13 and the second heat transfer element 14 are frictionlessly movable relative to each other.

[0060] At least some of the electronic components 6 are arranged within the interior space 8, which is defined by the heat absorption section 2, the heat dissipation section 3, and the peripheral wall element 4. Therefore, the electronic components 6 are protected by the heat absorption section 2, the heat dissipation section 3, and the peripheral wall element 4. The arrangement of the electronic components 6 within the interior space 8 prevents foreign bodies from adhering to them.

[0061] The electronic components 6 include the sensor 6A and the transmitter 6B, which is configured to transmit acquisition data from sensor 6A. This configuration allows the management device located outside the thermoelectric generator 1 to easily acquire the acquisition data from sensor 6A. In a case where the thermoelectric generator 1 is installed at each of the multiple objects B in the industrial plant, the management device is configured to monitor and manage the states of the multiple objects B based on the acquisition data from the sensors 6A, which are transmitted by the multiple thermoelectric generators 1. [Second embodiment]

[0062] A second embodiment is described. In the following description, component elements that are identical or equivalent to those of the preceding embodiment are designated by the same reference numerals, and the description of these elements is simplified or omitted.

[0063] Fig. Figure 5 is a schematic view illustrating an example of a heat transfer mechanism 10B according to the present embodiment. As shown in Fig. As shown in Figure 5, the heat transfer mechanism 10B comprises a first heat transfer element 13B, which includes the first connecting section 11, which is configured to be connected to the thermoelectric generating module 5, an elastic section 15B, which is arranged between the first heat transfer element 13B and the heat absorption section 2, and a second heat transfer element 14B, which includes the second connecting section 12, which is configured to be connected to the heat absorption section 2 and is configured to guide the first heat transfer element 13B.

[0064] The first heat transfer element 13B is a cylindrical element having an upper plate section. The first connecting section 11 comprises an end section on the +Z side of the first heat transfer element 13B. The first heat transfer element 13B is connected to the end face 51 of the thermoelectric generating module 5.

[0065] The second heat transfer element 14B is a rod-shaped element arranged within the first heat transfer element 13B. The second connecting section 12 includes an end section on the -Z side of the second heat transfer element 14B. The second heat transfer element 14B is attached to the heat absorption section 2. The first heat transfer element 13B and the second heat transfer element 14B are movable relative to each other in the Z-axis direction. The second heat transfer element 14B guides the first heat transfer element 13B in the Z-axis direction.

[0066] The elastic section 15B deforms elastically in the Z-axis direction. The elastic section 15B comprises an elastic element, such as a helical spring. The elastic section 15B is located between an end section on the -Z-side of the first heat transfer element 13B and the inner surface 2B of the heat absorption section 2. An end section on the +Z-side of the elastic section 15B is connected to the end section on the -Z-side of the first heat transfer element 13B.

[0067] As described above, in the present embodiment, excessive external force acting on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13B is also suppressed. Accordingly, a deterioration in the performance of the thermoelectric generator 1 is suppressed. [Third embodiment]

[0068] A third embodiment is described. Fig. Figure 6 is a schematic view illustrating an example of a heat transfer mechanism 10C according to the present embodiment. As shown in Fig. As shown in Figure 6, the heat transfer mechanism 10C comprises a first heat transfer element 13C which includes the first connecting section 11, a second heat transfer element 14C which includes the second connecting section 12 and is configured to guide the first heat transfer element 13C, and an elastic section 15C which is arranged between the first heat transfer element 13C and the second heat transfer element 14C.

[0069] The first heat transfer element 13C is a rod-shaped element. The first connecting section 11 comprises an end section on the +Z side of the first heat transfer element 13C. The first heat transfer element 13C is connected to the end face 51 of the thermoelectric generating module 5.

[0070] The second heat transfer element 14C is a cylindrical element with a base plate section. The second connecting section 12 includes an end section on the -Z side of the second heat transfer element 14C. The second heat transfer element 14C is attached to the heat absorption section 2. The first heat transfer element 13C and the second heat transfer element 14C are movable relative to each other in the Z-axis direction. The second heat transfer element 14C guides the first heat transfer element 13C in the Z-axis direction.

[0071] The elastic section 15C deforms elastically in the Z-axis direction. The elastic section 15C comprises an elastic element, such as a helical spring. The elastic section 15C is located between an end section on the -Z-side of the first heat transfer element 13C and the base plate section of the second heat transfer element 14C. An end section on the +Z-side of the elastic section 15B is connected to the end section on the -Z-side of the first heat transfer element 13C.

[0072] As described above, in the present embodiment, excessive external force acting on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13C is also suppressed. Accordingly, a deterioration in the performance of the thermoelectric generator 1 is suppressed. [Fourth embodiment]

[0073] A fourth embodiment is described. Fig. Figure 7 is a schematic view illustrating an example of a heat transfer mechanism 10D according to the present embodiment. As shown in Fig. As shown in Figure 7, the heat transfer mechanism 10D comprises a first heat transfer element 13D which includes the first connecting section 11, a second heat transfer element 14D which includes the second connecting section 12 and is configured to guide the first heat transfer element 13D, and an elastic section 15D which is arranged between the first heat transfer element 13D and the second heat transfer element 14D.

[0074] The first heat transfer element 13D is a rod-shaped element. The first connecting section 11 comprises an end section on the +Z side of the first heat transfer element 13D. The first heat transfer element 13D is connected to the end face 51 of the thermoelectric generating module 5.

[0075] The second heat transfer element 14D is a cylindrical element with a base plate section. The second connecting section 12 includes an end section on the -Z side of the second heat transfer element 14D. The second heat transfer element 14D is attached to the heat absorption section 2. The first heat transfer element 13D and the second heat transfer element 14D are movable relative to each other in the Z-axis direction. The second heat transfer element 14D guides the first heat transfer element 13D in the Z-axis direction.

[0076] The elastic section 15D deforms elastically in the Z-axis direction. The elastic section 15D comprises a compressible fluid, such as a gas. The elastic section 15D is located between an end section on the -Z-side of the first heat transfer element 13D and the base plate section of the second heat transfer element 14D.

[0077] As described above, in the present embodiment, excessive external force acting on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13D is also suppressed. Accordingly, a deterioration in the performance of the thermoelectric generator 1 is suppressed. [Fifth embodiment]

[0078] A fifth embodiment is described. Fig. Figure 8 is a schematic view illustrating an example of a heat transfer mechanism 10E according to the present embodiment. As shown in Fig. As shown in Figure 8, the heat transfer mechanism 10E comprises a first heat transfer element 13E, which includes the first connecting section 11, and an elastic section 15E, which includes the second connecting section 12 and is arranged between the first heat transfer element 13E and the heat absorption section 2.

[0079] The first heat transfer element 13E is a rod-shaped element. The first connecting section 11 comprises an end section on the +Z side of the first heat transfer element 13E. The first heat transfer element 13E is connected to the end face 51 of the thermoelectric generating module 5.

[0080] The elastic section 15E deforms elastically in a Z-axis direction. The second connecting section 12 includes an end section on the -Z-side of the elastic section 15E. The end section on the -Z-side of the elastic section 15E is attached to the heat-absorbing section 2. The elastic section 15E is positioned between an end section on the -Z-side of the first heat transfer element 13E and the heat-absorbing section 2. The first heat transfer element 13E is supported by the elastic section 15E.

[0081] As described above, in the present embodiment, excessive external force acting on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13D is also suppressed. Accordingly, a deterioration in the performance of the thermoelectric generator 1 is suppressed.

[0082] Note that in the present embodiment, the elastic section 15E can be arranged between the first heat transfer element 13E and the heat dissipation section 3, and the thermoelectric generating module 5 can be arranged between the first heat transfer element 13E and the heat absorption section 2. In this configuration, the elastic section 15E comprises the first connecting section 11, which is configured to be connected to the heat dissipation section 3, and the first heat transfer element 13E comprises the second connecting section 12, which is configured to be connected to the heat absorption section 2. [Sixth embodiment]

[0083] A sixth embodiment is described. Fig. Figure 9 is a schematic view illustrating an example of a heat transfer mechanism 10F according to the present embodiment. As shown in Fig. As shown in Figure 6, the heat transfer mechanism 10F comprises a first heat transfer element 13F, which includes the first connecting section 11, which is configured to be connected to the thermoelectric generating module 5, an elastic section 15F, which is arranged between the first heat transfer element 13F and the heat dissipation section 3, and a second heat transfer element 14F, which includes the second connecting section 12, which is configured to be connected to the heat dissipation section 3 and is configured to guide the first heat transfer element 13F.

[0084] The first heat transfer element 13F is a rod-shaped element. The first connecting section 11 comprises an end section on the -Z-side of the first heat transfer element 13F. The thermoelectric generating module 5 is arranged between the first connecting section 11 of the first heat transfer element 13F and the heat absorption section 2.

[0085] The second heat transfer element 14F is a cylindrical element arranged around the first heat transfer element 13F. The second connecting section 12 includes an end section on the +Z side of the second heat transfer element 14F. The second heat transfer element 14F is attached to the heat dissipation section 3. The first heat transfer element 13F and the second heat transfer element 14F are movable relative to each other in the Z-axis direction. The second heat transfer element 14F guides the first heat transfer element 13F in the Z-axis direction.

[0086] The elastic section 15F deforms elastically in the Z-axis direction. The elastic section 15F comprises an elastic element, such as a helical spring. The elastic section 15F is located between an end section on the +Z side of the first heat transfer element 13F and the heat dissipation section 3. An end section on the +Z side of the elastic section 15F is connected to the heat dissipation section 3. An end section on the -Z side of the elastic section 15F is attached to the first heat transfer element 13F.

[0087] As described above, in the present embodiment, excessive external force acting on the thermoelectric generating module 5 or separation of the thermoelectric generating module 5 from the first heat transfer element 13F is also suppressed. Accordingly, a deterioration in the performance of the thermoelectric generator 1 is suppressed. [Other embodiments]

[0088] In the embodiments described above, the elastic sections 15 (15B, 15C, 15E, 15F) may not have a helical spring. The elastic section 15 may have at least one leaf spring, disc spring, resin spring, or spiral spring.

[0089] In the embodiments described above, an elastic section 15 (15D) need not be a compressible gas, but can be a liquid.

[0090] In the embodiments described above, the elastic section 15 (15B, 15C, 15D, 15E, 15F) can be a non-spring and can be an elastic element such as rubber.

[0091] In the embodiments described above, the heat transfer plate 16 can be omitted.

[0092] In the embodiments described above, sensor 6A is not limited to a temperature sensor. Sensor 6A can, for example, be a vibration sensor. List of reference symbols 1 THERMOELECTRIC GENERATOR 2 HEAT ABSORPTION SECTION 2A HEAT ABSORPTION SURFACE 2B INNER SURFACE 2BT RECESS 2BU RECESS 3 HEAT EXHAUST SECTION 3A HEAT RADIATION SURFACES 3B INNER SURFACE 3BT cutout 3BU RECESS 4 CIRCUMFERENCE ELEMENT 4B INNER SURFACE 5 THERMOELECTRIC GENERATION MODULE 5P THERMOELECTRIC P-TYPE SEMICONDUCTOR DEVICE 5N THERMOELECTRIC N-TYPE SEMICONDUCTOR DEVICE 6 ELECTRONIC COMPONENT 6A SENSOR 6B TRANSMITTER 6C AMPLIFIER 6D MICROCOMPUTER 7 SUBSTRATE 7A SUPPORT ELEMENT 7B SUPPORT ELEMENT 8 INTERIOR 9A SEALING ELEMENT 9B SEALING ELEMENT 10 HEAT TRANSFER MECHANISM 10B Heat Transfer Mechanism 10C HEAT TRANSFER MECHANISM 10D HEAT TRANSFER MECHANISM 10E Heat Transfer Mechanism 10F HEAT TRANSFER MECHANISM 11 FIRST CONNECTION SECTION 12 SECOND CONNECTION SECTION 13 FIRST HEAT TRANSFER ELEMENT 13B FIRST HEAT TRANSFER ELEMENT 13C FIRST HEAT TRANSFER ELEMENT 13D FIRST HEAT TRANSFER ELEMENT 13E FIRST HEAT TRANSFER ELEMENT 13F FIRST HEAT TRANSFER ELEMENT 14 SECOND HEAT TRANSFER ELEMENT 14B SECOND HEAT TRANSFER ELEMENT 14C SECOND HEAT TRANSFER ELEMENT 14D SECOND HEAT TRANSFER ELEMENT 14F SECOND HEAT TRANSFER ELEMENT 15 ELASTIC SECTION 15B ELASTIC SECTION 15C ELASTIC SECTION 15D ELASTIC SECTION 15E ELASTIC SECTION 15F ELASTIC SECTION 16 HEAT TRANSFER SHEET 51 END SURFACES 51S FIRST SUBSTRATE 52 END AREA 52S SECOND SUBSTRATE 53 FIRST ELECTRODE 54 SECOND ELECTRODE 55 CONNECTION LINE B OBJECT< / wirkungen>

Claims

[1] Thermoelectric generator (1) comprising: a heat absorption section (2); a heat dissipation section (3); a thermoelectric generating module (5) arranged between the heat absorption section (2) and the heat emission section (3) and having a first end surface in contact with the heat absorption section (2) or the heat emission section (3); and a first heat transfer element (13) arranged between the heat absorption section (2) and the heat emission section (3) and comprising a first connecting section (11) which is in contact with a second end surface of the thermoelectric generating module (5); an elastic section (15) arranged between the first heat transfer element (13) and at least one of the heat absorption section (2) and the heat emission section (3); and a second heat transfer element (14) comprising a second connecting section (12) configured to be connected at one end to at least one of the heat absorption section (2) and the heat emission section (3) and guiding the first heat transfer element (13) on both sides in a direction orthogonal to the heat absorption section (2) and the heat emission section (3), while at least one region of the second heat transfer element (14) is in contact with the first heat transfer element (13) along the orthogonal direction, wherein a lubricant with a heat transfer property is provided between an inner circumferential surface of the second heat transfer element (14) and an outer circumferential surface of the first heat transfer element (13). [2] Thermoelectric generator (1) according to claim 1, where the elastic section (15, 15B to 15F) includes the second connecting section (12). [3] Thermoelectric generator (1) according to claim 1 or 2, wherein the first heat transfer element (13, 13B to 13F) is a rod-shaped element, and the second heat transfer element (14, 14B to 14F) is a cylindrical element arranged around the first heat transfer element (13, 13B to 13F). [4] Thermoelectric generator (1) according to one of claims 1 or 2, wherein the first heat transfer element (13, 13B to 13F) is a cylindrical element, and the second heat transfer element (14, 14B to 14F) is a rod-shaped element that is arranged inside the first heat transfer element (13, 13B to 13F). [5] Thermoelectric generator (1) according to claim 1, where the elastic section (15, 15B to 15F) is arranged between the first heat transfer element (13, 13B to 13F) and the second heat transfer element (14, 14B to 14F). [6] Thermoelectric generator (1) according to any one of claims 1 to 5, wherein the first heat transfer element (13, 13B to 13F) and at least a part of the second heat transfer element (14, 14B to 14F) come into contact with each other. [7] Thermoelectric generator (1) according to one of claims 1 to 6, wherein the first connecting section (11) is connected to the thermoelectric generating module (5) via a heat transfer plate (16). [8] Thermoelectric generator (1) according to any one of claims 1 to 7, further comprising a circumferential wall element (4) which is arranged between a circumferential edge section of the heat absorption section (2) and a circumferential edge section of the heat emission section (3) and is configured to connect the heat absorption section (2) and the heat emission section (3), wherein at least part of the heat transfer mechanism (10, 10B to 10F) is arranged in an interior space (8) defined by the heat absorption section (2), the heat emission section (3) and the peripheral wall element (4). [9] Thermoelectric generator (1) according to claim 8, further comprising electronic components (6) which are powered by the electrical energy generated by the thermoelectric generating module (5), wherein at least some of the electronic components (6) are arranged in the interior (8). [10] Thermoelectric generator (1) according to claim 9, wherein the electronic components (6) comprise a sensor (6A) and a transmitter (6B) configured to transmit detection data from the sensor (6A).

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