JP2015032747A - Fixing method of thermoelectric conversion element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a thermoelectric conversion element which can be operated continuously without requiring to lay the wiring or to replace a battery, while suppressing damage on the thermoelectric conversion element.SOLUTION: A temperature detector 101 includes a detecting section 11 having a temperature receiving element 2, a power generating section 12 having a thermoelectric conversion element 3, a first heat transfer section 41 for transferring heat or cold heat to the power generating section 12, an emitting section 13, a second heat transfer section 42 for transferring heat or cold heat to the emitting section 13, and an output section 14 for outputting the measurement results. The power required for operation of the temperature receiving element 2 and output section 14 is supplied by the thermoelectric conversion element 3. In the fixing structure of a thermoelectric conversion element, the power generating section 12 includes an element pressing structure 16 for fixing the thermoelectric conversion element 3 by pressing, and thermal connection elements 45a, 45b having shock absorbing properties are interposed between the first heat transfer section 41 and thermoelectric conversion element 3 or between the second heat transfer section 42 and thermoelectric conversion element 3.

Description

  The present invention relates to a thermoelectric conversion element fixing structure.

  A monitoring system that detects the temperature of a fluid such as exhaust gas generated from a device such as an engine and grasps the occurrence of an abnormality at an early stage is considered as an effective means for preventing a failure or an accident of the device.

  An example of a temperature sensor for detecting the temperature of a fluid to be measured by disposing an element in a flow path through which the fluid to be measured flows in a high temperature environment such as the inside of a catalytic converter or an exhaust pipe of an exhaust gas purification device, It is described in Japanese Patent No. 3826095 (Patent Document 1).

  An example of the temperature monitoring device is described in JP 2012-127710 A (Patent Document 2).

Japanese Patent No. 3826095 JP 2012-127710 A

  In order to construct a fluid temperature monitoring system, it is required to arrange temperature sensors at a large number of locations and form a sensor network. Like a temperature sensor, a normal temperature sensor is a wired connection type, and thus wiring is required. In order to arrange the temperature sensors with wiring in many places, restrictions on the installation place and cost required for the installation become problems, and in reality, a sufficiently large number of temperature sensors cannot be arranged.

  Therefore, it is conceivable to use a wireless temperature sensor that does not require wiring instead of a wired connection type temperature sensor, but in that case, it is necessary to provide a battery as an operating power source, and the replacement cost of the battery becomes a problem. It was difficult to form a sufficient sensor network.

  On the other hand, in the apparatus described in Patent Document 2, electric power is generated based on thermal energy received from an object to be monitored using a thermoelectric conversion element, and temperature information is generated from a voltage signal output from the thermoelectric conversion element. Temperature information is sent to the outside. However, in Patent Document 2, there is no detailed description of the application, the method of contacting the heat source, the cooling method, etc., and the specific structure is unknown.

  Moreover, an impact or excessive pressure applied to the thermoelectric conversion element can cause damage to the thermoelectric conversion element.

  Therefore, the present invention does not require wiring laying or battery replacement for securing a power source, can detect the temperature of the heat source, can operate continuously, and can prevent damage to the thermoelectric conversion element. It is an object to provide a fixing structure for a conversion element.

  In order to achieve the above object, the thermoelectric conversion element fixing structure according to the present invention is a thermoelectric conversion element fixing structure in a temperature detection device. The temperature detection device referred to here is a detection unit including a temperature receiving element that detects the temperature of the heat source, a power generation unit that is arranged apart from the detection unit, and includes a thermoelectric conversion element, and the heat or cold of the heat source. A first heat transfer unit that transmits to the power generation unit, a discharge unit that is spaced apart from the power generation unit, releases heat or cold to the outside, and receives heat or cold from the power generation unit and transmits the heat or cold to the discharge unit A second heat transfer section, and an output section for outputting a measurement result obtained from the temperature receiving element. The thermoelectric conversion element generates power by a temperature difference between a surface of the thermoelectric conversion element on the first heat transfer unit side and a surface of the thermoelectric conversion element on the second heat transfer unit side. The electric power necessary for the operation of the temperature receiving element and the output unit is supplied by the thermoelectric conversion element. In this thermoelectric conversion element fixing structure, the power generation unit houses the thermoelectric conversion element and presses the thermoelectric conversion element along a direction in which the first heat transfer unit and the second heat transfer unit are arranged. The element pressing structure which fixes by this is provided. A thermal connection element having shock absorption properties is interposed between at least one of the first heat transfer unit and the thermoelectric conversion element and between the second heat transfer unit and the thermoelectric conversion element.

  According to the present invention, since the temperature detection device can generate power by itself and supply power for operating the temperature receiving element and the output unit, wiring laying and battery replacement for securing a power source are unnecessary, and the heat source The temperature can be detected and operated continuously. Furthermore, as a fixing structure of the thermoelectric conversion element in the temperature detection device, it is possible to suppress an impact from being applied to the thermoelectric conversion element by disposing a thermal connection element having shock absorption, and therefore, The probability that the thermoelectric conversion element is damaged can be reduced.

It is a conceptual diagram of the temperature detection apparatus in Embodiment 1 based on this invention. It is sectional drawing of the temperature detection apparatus in Embodiment 1 based on this invention. It is an expanded sectional view of the vicinity of the thermoelectric conversion element with which the temperature detection apparatus in Embodiment 1 based on this invention is provided. It is sectional drawing of the temperature detection apparatus in Embodiment 2 based on this invention. It is an expanded sectional view of the electric power generation part of the temperature detection apparatus in Embodiment 2 based on this invention. It is a side view of the place which took out the thermal connection component independently. It is a side view of the modification of a thermal connection component. It is an expanded sectional view of the electric power generation part of the temperature detection apparatus in Embodiment 3 based on this invention. It is sectional drawing of the modification of the temperature detection apparatus in Embodiment 3 based on this invention. It is an expanded sectional view of the temperature detection apparatus in Embodiment 4 based on this invention.

(Embodiment 1)
(Constitution)
With reference to FIGS. 1-3, the fixing structure of the thermoelectric conversion element in Embodiment 1 based on this invention is demonstrated. A temperature detection apparatus 101 in the present embodiment is conceptually shown in FIG.

  The temperature detection device 101 includes a detection unit 11 that includes a temperature receiving element 2 that detects the temperature of the heat source, a power generation unit 12 that is disposed apart from the detection unit 11 and includes the thermoelectric conversion element 3, and heat or cold of the heat source 1. The first heat transfer section 41 that transmits the heat to the power generation section 12, the discharge section 11 that is disposed apart from the power generation section 12, and releases heat or cold to the outside, and the discharge section that receives heat or cold from the power generation section 12 11 is provided with a second heat transfer section 42 that transmits to the heat transfer element 11 and an output section 14 that outputs the measurement result obtained from the temperature receiving element 2. The thermoelectric conversion element 3 generates power by a temperature difference between the surface of the thermoelectric conversion element 3 on the first heat transfer unit 41 side and the surface of the thermoelectric conversion element 3 on the second heat transfer unit 42 side. Electric power necessary for the operation of the temperature receiving element 2 and the output unit 14 is supplied by the thermoelectric conversion element 3. The power generation unit 12 includes the element pressing structure 16 that accommodates the thermoelectric conversion element 3 and fixes the thermoelectric conversion element 3 by pressing along the direction in which the first heat transfer unit 41 and the second heat transfer unit 42 are arranged. . Thermal connection elements 45a and 45b having shock absorption properties are provided between at least one of the first heat transfer section 41 and the thermoelectric conversion element 3 and between the second heat transfer section 42 and the thermoelectric conversion element 3. Intervene.

  The temperature receiving element 2 provided in the detection unit 11 and the output unit 14 are connected by a wiring 4. The thermoelectric conversion element 3 and the output unit 14 are connected by a wiring 5. An electronic circuit may be disposed in the output unit 14. As a method of output by the output unit 14, a method of transmitting wirelessly is conceivable, but a method of displaying on some display device is also conceivable.

  In FIG. 1, the tip of the first heat transfer unit 41 is drawn at a position different from the detection unit 11, but the temperature receiving element 2 and the tip of the first heat transfer unit 41 are both in the detection unit 11. It may be arranged.

  A more specific configuration of the temperature detection apparatus 101 is shown in FIG. In FIG. 2, for convenience of explanation, some parts such as the case 6 are displayed in a state of being divided in half. The upper and lower concepts mentioned here are merely for convenience of explanation, and are not always used in such a posture in actual use.

  In the example shown in FIG. 2, the first heat transfer unit 41 is housed in a cylindrical case 6. The lower end of the case 6 is closed and has a dome-like outer shape. The temperature receiving element 2 is disposed inside the case 6. A portion where the temperature receiving element 2 in the vicinity of the lower end of the case 6 is accommodated is the detection unit 11. The temperature receiving element 2 is in contact with the inner surface of the case 6. The tip of the first heat transfer unit 41 is also in contact with the inner surface of the case 6. In the example illustrated in FIG. 2, the tip of the first heat transfer unit 41 is disposed in the detection unit 11 as with the temperature receiving element 2.

  The upper end of the case 6 is open, and is a power generation unit housing 6 a that is widened to accommodate the thermoelectric conversion element 3. The upper end of the first heat transfer section 41 has a flat surface facing the thermoelectric conversion element 3 and spreads in a collar shape. The lower end of the second heat transfer part 42 has a flat surface facing the thermoelectric conversion element 3 and spreads in a collar shape. The thermoelectric conversion element 3 is sandwiched between the first heat transfer part 41 and the second heat transfer part 42 by attaching the fixing component 7 from the upper side in a state where the thermoelectric conversion element 3 is accommodated in the power generation unit housing 6a. Is fixed. In the example shown in FIG. 2, a female screw is provided on the inner surface of the power generation unit housing 6 a, and a male screw is provided on the lower outer surface of the fixed component 7. The fixed component 7 is assembled by being screwed into the power generation unit housing 6a in a state where the thermoelectric conversion element 3 is pressed downward.

  The power generation unit 12 includes the element pressing structure 16 that accommodates the thermoelectric conversion element 3 and fixes the thermoelectric conversion element 3 by pressing along the direction in which the first heat transfer unit 41 and the second heat transfer unit 42 are arranged. . The part where the upper end of the first heat transfer part 41 spreads and the part where the lower end of the second heat transfer part 42 spreads form part of the element pressing structure 16.

  FIG. 3 shows an enlarged view of the vicinity of the thermoelectric conversion element 3. The thermoelectric conversion element 3 has a surface 3a and a surface 3b so as to face each other. The end of the first heat transfer section 41 is in contact with the surface 3a of the thermoelectric conversion element 3 through the heat connection element 45a, and the end of the second heat transfer section 42 is in contact with the surface 3b through the heat connection element 45b. ing. The thermal connection elements 45a and 45b are shock-absorbing. Here, an example in which the thermal connection element is in contact with both the surfaces 3a and 3b has been shown, but between the first heat transfer section 41 and the thermoelectric conversion element 3 and between the second heat transfer section 42 and the thermoelectric conversion element 3 The thermal connection element should just interpose at least any one of between. However, it is preferable to intervene in both. The heat connection elements 45a and 45b may be, for example, elastic sheets or applied grease. The elastic sheet may be, for example, a rubber sheet.

(Action / Effect)
In the present embodiment, the temperature detecting device can generate power by itself and supply power for operating the temperature receiving element 2 and the output unit 14, so that there is no need for wiring laying or battery replacement for securing a power source. It can detect the temperature of the heat source and operate continuously. Furthermore, in the present embodiment, at least one of the first heat transfer unit 41 and the thermoelectric conversion element 3 and the second heat transfer unit 42 and the thermoelectric conversion element 3 has shock absorption. Since the thermal connection elements 45 a and 45 b are interposed, it is possible to suppress an impact from being applied to the thermoelectric conversion element 3. Therefore, in the present embodiment, damage to the thermoelectric conversion element 3 due to vibration or impact can be suppressed.

  In the present embodiment, the first heat transfer unit 41 is preferably a heat pipe or a metal rod. This is because by adopting this configuration, the first heat transfer section 41 can efficiently transfer heat or cold to the thermoelectric conversion element 3.

  It is preferable that the outer peripheral surface of the 1st heat-transfer part 41 is covered with the heat insulating material or space. In the example shown in FIG. 2, the outer peripheral surface of the first heat transfer unit 41 is covered with a space 8. That is, in the example shown in FIG. 2, the first heat transfer section 41 is installed through the space 8 formed in a cylindrical shape inside the case 6. The space 8 may be a space filled with vacuum or air. Instead of providing the space 8 around the first heat transfer part 41 in this way, a heat insulating material is arranged in a cylindrical shape inside the case 6, and the first heat transfer part 41 is arranged inside the heat insulating material. It may be a configuration.

  For example, when the heat source 1 is at a high temperature, the heat entering the lower end of the first heat transfer unit 41 from the heat source 1 is the first heat transfer unit 41, the heat connection element 45a, the thermoelectric conversion element 3, the heat connection element 45b, the second It is assumed that heat is transferred in the order of the heat transfer section 42 and the discharge section 13. It is desirable to suppress as much as possible that the heat that has entered the lower end of the first heat transfer section 41 from the heat source 1 leaks and is transmitted to other routes. This is because in order to increase the temperature difference in the thermoelectric conversion element 3 as much as possible, it is desirable that the heat that has entered the lower end of the first heat transfer section 41 from the heat source 1 is transferred as much as possible to the surface 3a of the thermoelectric conversion element 3. is there. By covering the outer peripheral surface of the first heat transfer section 41 with a heat insulating material or space, the heat that has entered the lower end of the first heat transfer section 41 can be prevented from escaping.

  For example, when a high temperature fluid to be measured passes through a pipe, the temperature tends to be slightly lower in the vicinity of the outer periphery of the pipe while the center of the pipe is hot. In such a situation, when it is arranged so that the tip of the first heat transfer unit 41 and the detection unit 11 reach the center of the pipe, the heat received by the first heat transfer unit 41 at the center of the pipe is the first. It is effective to cover the outer peripheral surface of the first heat transfer part 41 with a heat insulating material or a space so as not to be taken away by the fluid in the vicinity of the outer periphery of the pipe while being transmitted through the inside of the heat transfer part 41. is there.

  Moreover, it is required to suppress other heat from being mixed into an undesired portion of the temperature detection device from the outside as much as possible. This is because the temperature difference in the thermoelectric conversion element 3 is reduced when a portion that does not need to be heated is heated to high temperature by heat from the outside. By covering the outer peripheral surface of the first heat transfer section 41 with a heat insulating material or a space, it is possible to prevent the heat transmitted through the first heat transfer section 41 from heating undesired components other than the thermoelectric conversion element 3. .

  In this Embodiment, the example in which the case 6 was provided so that the 1st heat-transfer part 41 was wrapped was shown. Thus, it is preferable to include the case 6 that houses at least the first heat transfer unit 41. The case 6 is for preventing the first heat transfer unit 41 from being deteriorated due to the first heat transfer unit 41 being directly exposed to a high temperature fluid to be measured. A configuration without the case 6 is also conceivable as the temperature detection device. Even when there is no case 6 for housing the first heat transfer section 41, the temperature receiving element 2 and the first heat transfer section 41 are arranged. In this case, it is preferable that the first heat transfer portion 41 is exposed only at the tip and the outer peripheral surface is covered with a heat insulating material.

  In the present embodiment, the second heat transfer unit 42 is preferably a heat pipe or a metal rod. This is because by adopting this configuration, the second heat transfer section 42 can efficiently transfer heat or cold to the discharge section 13.

  It is preferable that the outer peripheral surface of the second heat transfer section 42 is covered with a heat insulating material or a space. In the example shown in FIG. 2, the outer peripheral surface of the second heat transfer section 42 is covered with the heat insulating material 9. Instead of using the heat insulating material 9, some case surrounding the second heat transfer section 42 may be arranged so that the outer peripheral surface of the second heat transfer section 42 is covered with a space. This space may be a space filled with vacuum or air. With such a configuration, it is possible to prevent the heat transmitted from the first heat transfer section 41 and the like without passing through the thermoelectric conversion element 3 from entering the second heat transfer section 42, so that the thermoelectric It can prevent that the temperature difference in the conversion element 3 becomes small. Further, with this configuration, it is possible to prevent radiant heat from the external environment from entering the second heat transfer section 42.

  The heat connection elements 45 a and 45 b are preferably made of a material having a property of filling a minute gap generated at the interface between the first heat transfer section 41 or the second heat transfer section 42 and the thermoelectric conversion element 3. This is because the heat resistance can be lowered when the first heat transfer section 41 or the second heat transfer section 42 and the thermoelectric conversion element 3 are brought into direct contact with each other when having such properties. .

  The power generation unit 12 may be used for fixing the temperature detection device 101 to, for example, a pipe through which the fluid to be measured flows. In this case, the temperature detection device 101 is attached so as to penetrate the outer wall of the pipe. That is, the temperature detection device 101 is attached to the pipe so that a portion below the power generation unit 12 in FIG. 2 protrudes into the pipe and a portion above the power generation unit 12 in FIG. 2 protrudes to the outside of the pipe. It is done. As a result, the detection unit 11 is arranged at a position that enters the pipe to some extent, and the discharge unit 13 is arranged at a position separated from the pipe to some extent.

(Embodiment 2)
(Constitution)
With reference to FIGS. 4-7, the fixing structure of the thermoelectric conversion element in Embodiment 2 based on this invention is demonstrated. FIG. 4 shows the entire temperature detection apparatus 102 in the present embodiment, and FIG. 5 shows an enlarged view of the power generation unit 12. The temperature detection device 102 has basically the same configuration as the temperature detection device 101 shown in the first embodiment, but differs in the following points.

  The thermal connection elements 45 a and 45 b include a thermal connection component having a contact surface portion facing the thermoelectric conversion element 3, and a shock absorbing material having shock absorption arranged so as to overlap the contact surface portion. That is, the thermal connection element 45a includes a thermal connection component 46a and a shock absorber 47a. The thermal connection element 45b includes a thermal connection component 46b and a shock absorber 47b.

  The place where the thermal connection component 46a is taken out alone is shown in FIG. The thermal connection component 46a has a contact surface portion 46ac. The thermal connection component 46a includes a collar portion 46ad. The heat connection component 46 a has a receiving part 46 ae for connection with the first heat transfer part 41. The shape of the heat connection component 46b is also symmetrical in the vertical direction. In addition, the shape of the thermal connection components 46a and 46b shown here is merely an example, and is not limited thereto. In FIG. 6, the collar portion 46ad is on the extension of the contact surface portion 46ac. However, as shown in FIG. 7, the collar portion 46ad may be located at a position shifted from the contact surface portion 46ac.

(Action / Effect)
Since the thermal connection element includes the impact absorbing material, it is possible to suppress the impact from being applied to the thermoelectric conversion element. Therefore, in this embodiment, the same effect as described in Embodiment 1 can be obtained. Furthermore, in this embodiment, since the thermal connection element is a combination of the thermal connection component and the shock absorber, the thermal connection component is connected to the tip even if the tip of the heat transfer section is a simple rod. By doing, it can be made the shape which is easy to press against a thermoelectric conversion element. Since the thermal connection component is used, the thermoelectric conversion element can be pressed efficiently.

(Embodiment 3)
(Constitution)
With reference to FIG. 8, the fixing structure of the thermoelectric conversion element in Embodiment 3 based on this invention is demonstrated. The place which expanded the electric power generation part 12 of the temperature detection apparatus in this Embodiment is shown in FIG. The temperature detection device in the present embodiment has basically the same configuration as the temperature detection device 102 shown in the second embodiment, but differs in the following points.

  The element pressing structure 16 that sandwiches the thermoelectric conversion element 3 includes a fastener 48 in addition to the thermal connection elements 45a and 45b. The thermal connection components 46a and 46b, which are part of the thermal connection elements 45a and 45b, are fixed by the fasteners 48 so as to sandwich the thermoelectric conversion element 3 therebetween. A constant pressing force acts on the thermoelectric conversion element 3. The thermoelectric conversion element 3 and the element pressing structure 16 are installed in the power generation unit 12 in a state of being fixed by the action of the fastening tool 48. The fastening tool 48 is, for example, a screw or a nut.

(Action / Effect)
In the present embodiment, a constant pressing force can be applied to the thermoelectric conversion element 3 by the action of the fastener 48. In the present embodiment, the element pressing structure 16 can be handled as an integrated object in a state where the thermoelectric conversion element 3 is fixed in advance, and the element pressing structure 16 only needs to be housed in the power generation unit housing 6a. Become.

  Here, although the example in case there exist heat connection components 46a and 46b was shown, as shown in Drawing 9, it provides a brim-like part at the tip of the 1st heat transfer part 41 and the 2nd heat transfer part 42, and these It is good also as a structure fixed with the fastener 49 using a collar-shaped part.

(Embodiment 4)
(Constitution)
With reference to FIG. 10, the fixing structure of the thermoelectric conversion element in Embodiment 4 based on this invention is demonstrated. The place which expanded the electric power generation part 12 of the temperature detection apparatus in this Embodiment is shown in FIG. The temperature detection device in the present embodiment has basically the same configuration as the temperature detection device 101 shown in the first embodiment, but differs in the following points.

  At least a part of the portion where the element pressing structure 16 presses at least one of the first heat transfer part 41, the second heat transfer part 42, and the heat connection components 46a and 46b in order to press the thermoelectric conversion element 3. Is provided with a heat insulating material 50 having shock absorption.

(Action / Effect)
In this Embodiment, since the heat insulating material 50 which has a shock absorptivity is interposed in the appropriate location, it can suppress more reliably that an impact is added with respect to a thermoelectric conversion element.

(Embodiment 5)
(Constitution)
The fixing structure of the thermoelectric conversion element in Embodiment 5 based on this invention is demonstrated.

  As already shown in FIGS. 2, 5, etc., the element pressing structure 16 includes a power generation unit housing 6 a as a first portion having a female screw portion, and a first screw portion having a male screw portion for screwing into the first portion. The thermoelectric conversion element 3 is accommodated by the combination of the said 1st part and the said 2nd part including the stationary component 7 as 2 parts. The element pressing structure 16 presses the thermoelectric conversion element 3 by screwing the second part into the first part.

(Action / Effect)
In the present embodiment, the same effect as described in the first embodiment can be obtained. Furthermore, in the present embodiment, the element pressing structure 16 includes the first part and the second part, and the thermoelectric conversion element 3 can be pressed and fixed by screwing the second part into the first part. Easy to assemble.

  In the present embodiment, an example in which the power generation unit housing 6a is provided with the female screw part and the fixed component 7 is provided with the male screw part is shown, but the reverse may be possible. That is, a configuration in which a male screw portion is provided in the power generation unit housing 6a and a female screw portion is provided in the fixed component 7 may be employed. In this case, the fixed component 7 corresponds to the first part, and the power generation unit housing 6a corresponds to the second part.

  Further, the concept of the first part and the second part is not limited to the combination of the power generation unit housing and the fixed part, and any two parts may be used as long as the thermoelectric conversion element 3 is accommodated by combining the two parts. Good.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Heat source, 2 Temperature receiving element, 3 Thermoelectric conversion element, 4, 5 Wiring, 6 Case, 6a Power generation part housing | casing, 7 Fixed component, 8 Space, 9 Thermal insulation, 11 Detection part, 12 Power generation part, 13 Release | 14 output part, 16 element pressing structure, 41 1st heat transfer part, 42 2nd heat transfer part, 45a, 45b thermal connection element, 46a, 46b thermal connection part, 46ac contact surface part, 46ad collar part, 46ae receiving part, 47a, 47b Shock absorber, 48, 49 Fastener, 50 Insulating material, 101, 102 Temperature detector.

Claims (4)

A detector having a temperature sensing element for detecting the temperature of the heat source;
A power generation unit that is disposed apart from the detection unit and includes a thermoelectric conversion element;
A first heat transfer unit that transfers heat or cold of the heat source to the power generation unit;
A discharge part that is spaced apart from the power generation part and releases heat or cold to the outside;
A second heat transfer section that receives heat or cold from the power generation section and transmits the heat or cold heat to the discharge section;
An output unit that outputs a measurement result obtained from the temperature sensing element;
The thermoelectric conversion element generates power by a temperature difference between a surface of the thermoelectric conversion element on the first heat transfer unit side and a surface of the thermoelectric conversion element on the second heat transfer unit side,
The electric power necessary for the temperature receiving element and the output unit to operate is a fixed structure of the thermoelectric conversion element in the temperature detection device supplied by the thermoelectric conversion element,
The power generation unit includes an element pressing structure that houses the thermoelectric conversion element and fixes the thermoelectric conversion element by pressing the thermoelectric conversion element along a direction in which the first heat transfer unit and the second heat transfer unit are arranged.
Between at least one of the first heat transfer section and the thermoelectric conversion element and between the second heat transfer section and the thermoelectric conversion element, a thermal connection element having shock absorption properties is interposed. Thermoelectric conversion element fixing structure.   The said thermal connection element is provided with the thermal connection component which has a contact surface part which opposes the said thermoelectric conversion element, and the impact-absorbing material which has the shock absorption property arrange | positioned so that it may overlap with the said contact surface part. Thermoelectric conversion element fixing structure.   At least a part of the element pressing structure that presses at least one of the first heat transfer unit, the second heat transfer unit, and the heat connection component in order to press the thermoelectric conversion element, The thermoelectric conversion element fixing structure according to claim 1 or 2, wherein a heat-insulating material having shock absorption properties is interposed. The element pressing structure includes a first portion having a female screw portion and a second portion having a male screw portion for screwing into the first portion, and the element pressing structure is a combination of the first portion and the second portion. Contains a thermoelectric conversion element,
4. The thermoelectric conversion element fixing structure according to claim 1, wherein the element pressing structure presses the thermoelectric conversion element by screwing the second part into the first part. 5.

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