Heat conversion device

Abstract

To provide a heat exchanger in which heat exchange efficiency to a thermoelectric element is improved, power generation capacity can be adjusted by adjusting the number of heat exchangers, and power generation efficiency is maximized.SOLUTION: A heat exchange system 10 includes a first inclined member 2000 arranged to incline from one wall surface of a frame 3000 to one side of gas guide members 1400 of first and second heat exchangers 1000-1 and 1000-2, and a second inclined member 2100 arranged to incline from the other wall surface of the frame to the other side of the gas guide members of the first and second heat exchangers. Openings 3200 and 3202 are formed in the wall surface of the frame, and the one wall surface of the frame, the first inclined member, the gas guide members, the second inclined member, and the other wall surface of the frame are sequentially arranged along a first direction. The first and second inclined members guide high-temperature gas flowing into the heat exchange system toward a region where the thermoelectric module 1200 is arranged, whereby it is possible to improve power generation efficiency.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a heat conversion device, and more particularly to a heat conversion device that uses heat from hot gas to generate electricity. This relates to a conversion device. [Background technology]

[0002] Thermoelectric phenomena occur due to the movement of electrons and holes within a material. This phenomenon refers to the direct conversion of energy between heat and electricity.

[0003] Thermoelectric elements are a general term for elements that utilize thermoelectric phenomena, and are made up of P-type and N-type thermoelectric materials with metal electrodes. It has a structure in which a PN junction pair is formed by joining the two.

[0004] Thermoelectric elements are elements that utilize the temperature change of electrical resistance, a phenomenon in which electromotive force is generated by temperature differences. A device that utilizes the Seebeck effect, a phenomenon in which heat is absorbed or generated by electric current. They can be classified into elements that utilize the Loutier effect, etc.

[0005] Thermoelectric elements are widely used in home appliances, electronic components, communication components, etc. The element can be applied to cooling devices, heating devices, power generation devices, etc. The demands on thermoelectric performance are increasing.

[0006] Recently, it has become possible to generate electricity by using high-temperature waste heat generated from engines of automobiles and ships and thermoelectric elements. There is a need to generate electricity. At this time, a structure that can improve power generation performance is required. do. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Korean Patent Publication No. 10-2015-0132209 (2015.11.25) [Patent Document 2] Korean Patent Publication No. 10-2017-0063817 (2017.06.08) [Patent Document 3] Korean Patent Publication No. 10-2018-0134070 (2018.12.18) Summary of the Invention [Problem to be solved by the invention]

[0008] The technical problem to be solved by the present invention is to provide a heat conversion device that generates electricity by utilizing waste heat. That is the thing. [Means for solving the problem]

[0009] The power generating device according to one embodiment of the present invention includes a through hole that penetrates along a first direction and forms an inner surface. a case including a through hole; a second direction perpendicular to the first direction, the second direction being disposed in the through hole of the case; a duct having a flow path formed therein so that a first fluid flows along the direction of the duct; a first thermoelectric element disposed on the first thermoelectric element; and a first fin disposed on the first thermoelectric element. a module; a second thermoelectric element disposed on a second surface of the duct opposite the first surface; and a second thermoelectric module including a second fin disposed on the second thermoelectric element; and coupled to the case. a plurality of first guide portions disposed opposite to each other on the duct; a second guide portion disposed on a third surface formed between the first surface and the second surface, The second guide portion extends along the second direction between the plurality of first guide portions, and The first guide portion and the second guide portion each include an inclined surface, and the inclination of the inclined surface of the second guide portion The inclination angle is different from the inclination angles of the respective inclined surfaces of the plurality of first guide portions.

[0010] The inclined surface of the second guide portion may be disposed along the second direction.

[0011] The inclined surface of the first guide portion is configured to guide the second fluid in the first direction so that the second fluid flows along the first direction. the second guide portion is inclined with respect to the first direction or the second direction, and the inclined surface of the second guide portion is inclined with respect to the second direction or the second direction, The flow path may be inclined relative to the first direction so as to diverge and flow along the first direction.

[0012] The temperature of the second fluid may be higher than the temperature of the first fluid.

[0013] The duct is connected to the inner surface of the through hole of the case and has a plurality of oppositely disposed portions. a plurality of support parts and a body part disposed between the plurality of support parts, The guide portions are respectively disposed on the plurality of support portions of the duct, and the second guide portion is disposed on the duct. The device may be disposed on the body of the device.

[0014] The first guide portion and the second guide portion may not overlap with each other in the first direction.

[0015] The length of each of the plurality of support portions of the duct in the first direction is equal to or less than the length of the body portion of the duct in the first direction. the length of each of the plurality of support portions of the duct in the second direction is greater than the length of the body of the duct; It may be smaller than the length of the body in the first direction.

[0016] Each of the plurality of first guide parts includes a coupling part coupled to an inner surface of the through hole, The farther away from the coupling portion in the second direction, the more adjacent to the duct.

[0017] The inclined surfaces of the plurality of first guide portions and the second guide portion do not overlap with each other in the second direction. That's fine.

[0018] Each of the first guide portions includes a first end portion closest to the duct, and the second guide portion includes a first end portion closest to the duct. The guide portion may include an end portion in the second direction.

[0019] The support portion of the duct includes a side surface facing the second guide portion, and the plurality of first guides A plurality of first ends of the portion are disposed on the support portion of the duct, and the plurality of first ends are disposed on the side It can be adjacent to a surface.

[0020] The first fin and the second fin may each extend in the first direction.

[0021] The first fin and the second fin are each spaced apart from the second guide portion by a predetermined distance in the first direction. Distance can be maintained.

[0022] The duct includes a plurality of ducts spaced apart from one another, and each of the plurality of ducts is opposite to one another. a first surface facing the first thermoelectric module and a second surface facing the first thermoelectric module, the first thermoelectric module being disposed on the first surface; a plurality of one-sided thermoelectric modules disposed on the second surface, It may include a plurality of other-side thermoelectric modules arranged.

[0023] The plurality of one-side thermoelectric modules includes a plurality of first portions facing the inner surface of the through hole, and and a plurality of second portions facing the second thermoelectric module, The module includes a plurality of third portions facing the inner surface of the through-hole, and the first thermoelectric module. The fourth portion may include a plurality of fourth portions facing the ball.

[0024] The second part of the thermoelectric module on one side may be spaced a predetermined distance from the fourth part of the thermoelectric module on the other side. do.

[0025] The first thermoelectric module and the second thermoelectric module are each coupled to the duct. A plurality of first fastening portions may be included.

[0026] The first fastening portions may be spaced apart from one another along the second direction.

[0027] The second guide portion includes a plurality of grooves, and the plurality of grooves are spaced apart from each other along the second direction. can be arranged as follows.

[0028] a plurality of second fastening portions respectively disposed in the plurality of grooves of the second guide portion; The first fastening portions face the first surface and the second surface of the duct, and the plurality of second fastening portions The connection faces a third surface of the duct, and the first surface and the second surface face the third surface. It can be perpendicular to the surface.

[0029] A power generating device according to an embodiment of the present invention includes a duct through which a cooling fluid passes in a first direction; a first thermoelectric element disposed on a first surface of the substrate; and a first heat dissipation fan disposed on the first thermoelectric element. a first thermoelectric module including a first fin; a second thermoelectric module disposed parallel to the first surface of the duct; A second thermoelectric element is disposed on the surface, and a second heat dissipation fin is disposed on the second thermoelectric element. a second thermoelectric module including: a second thermoelectric module disposed between the first surface and the second surface of the duct; a gas guide member disposed on the first surface; a region in which the distance from the second surface to the center of the third surface increases as the distance from the second surface increases; The width between the outer side of the first heat dissipation fin and the outer side of the second heat dissipation fin is the gas guide member is larger than the width of the material and is positioned to correspond to the center of the third surface; One region directs incoming gas to the first thermoelectric module and the second thermoelectric module. and a gas guide member disposed on the third surface between the third surface and the gas guide member. a heat insulating member and a shield disposed on the heat insulating member between the third surface and the gas guide member; The sensor further includes a heat sink.

[0030] The distance between the first surface and the first heat dissipation fin is the distance between the first surface and the first thermoelectric element. the distance between the second surface and the second heat dissipation fin is larger than the distance between the second surface and the second thermoelectric It may be larger than the distance between the elements.

[0031] The width between the outside of the first thermoelectric element and the outside of the second thermoelectric element is equal to or greater than the width of the gas guide member. It could be above.

[0032] The gas guide member is disposed between the first surface and the second surface and parallel to the third surface. It may further be disposed on a fourth surface disposed thereon.

[0033] The heat insulating member has a first heat insulating surface disposed on the third surface, and a first heat insulating surface extending from the first heat insulating surface to the first surface. a second surface extending in a direction parallel to the first surface and disposed on a part of the first thermoelectric element; a second insulating surface and a second insulating surface extending from the first insulating surface in a direction parallel to the second surface and a third heat insulating surface disposed on a portion of the second thermoelectric element or the first thermoelectric element, and the shielding member is a first shield surface disposed on the first heat insulating surface; a first shield surface extending parallel to the first surface from the first shield surface; a second shield surface extending in a direction perpendicular to the first insulating surface and disposed on at least a portion of the second insulating surface; a third insulating surface extending from the first shield surface in a direction parallel to the second surface; The shielding surface may include a third shielding surface disposed at the

[0034] The gas guide member, the first shield surface, the first insulating surface, and the third surface are fastened together. It can be connected.

[0035] An air layer may be formed between the gas guide member and the first shield surface.

[0036] A power generation system according to an embodiment of the present invention includes a first power generation device, a power generation device in parallel with the first power generation device, and a power generation device in front of the first power generation device. a second power generating device disposed at a predetermined distance from the first power generating device; a frame supporting the first power generating device and the second power generating device; Each of the second power generating units has a duct through which a cooling fluid passes in a first direction; a first thermoelectric element disposed on a surface and a first heat dissipation fin disposed on the first thermoelectric element; a first thermoelectric module disposed on a second surface of the duct that is parallel to the first surface; a second thermoelectric element including a second thermoelectric element and a second heat dissipation fin disposed on the second thermoelectric element; a module; and a third surface of the duct disposed between the first surface and the second surface of the duct. a first gas guide member disposed apart from the third surface; and a first gas guide member disposed between the first surface and the second surface. and a fourth surface disposed parallel to the third surface and spaced apart from the fourth surface. a second gas guide member having a first surface and a second surface; a region in which the distance from the surface to the center of the third surface increases, The width between the outer side of the first heat dissipating fin and the outer side of the second heat dissipating fin is the first gas guide member being larger than the width and positioned to correspond to the center of the third surface; One region directs incoming gas to the first thermoelectric module and the second thermoelectric module. The frame is oriented perpendicular to the first direction so that the gas passes through. An opening is formed on both sides of the first surface and a second direction parallel to the second surface, and the cooling fluid Openings are formed on both sides in the first direction so that the gas can pass through, and the gas is It passes between the second thermoelectric module and the first thermoelectric module of the second power generator.

[0037] A first gas guide portion of the first power generating device and the second power generating device extends from one wall surface of the frame. a first inclined member arranged to incline to one side of the frame, and a second inclined member arranged to incline to one side of the frame; The first power generating device and the second power generating device are inclined to the other side of the first gas guide member. a second inclined member disposed on the first wall of the frame, the first inclined member, and the front The first gas guide member, the second inclined member, and the other wall surface of the frame are arranged in the first direction. They can be arranged sequentially along the

[0038] The first power generating device and the second power generating device are each disposed at one end of the duct. a fluid inlet into which the cooling fluid flows and a cooling fluid supply pipe disposed at the other end of the duct; the first inclined member extends from one wall surface of the frame to the front The second inclined member extends toward the boundary between the duct and the fluid inlet portion, It extends from the other wall surface toward the boundary between the duct and the fluid discharge portion. [Effects of the Invention]

[0039] According to the embodiment of the present invention, a thermal conversion device with excellent power generation performance can be obtained. According to the embodiment of the present invention, the number of parts used and the volume occupied are reduced, making assembly easy and Furthermore, according to the embodiment of the present invention, a thermal conversion device with excellent power generation performance can be obtained. A heat exchange device with improved heat transfer efficiency to the thermoelectric element can be obtained. According to the embodiment, the power generation capacity can be adjusted by adjusting the number of heat conversion devices. According to an embodiment of the invention, the contact area between the high temperature gas and the heat dissipation fins of the thermoelectric module is maximized. This can maximize the power generation efficiency. [Brief explanation of the drawings]

[0040] [Figure 1] 1 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention. [Figure 2] 1 is a perspective view of a heat exchanger according to an embodiment of the present invention; [Figure 3] 1 is an exploded perspective view of a heat exchanger according to an embodiment of the present invention; [Figure 4] 1 is a partial cross-sectional view of a heat conversion system including a heat conversion device according to an embodiment of the present invention. [Figure 5] 1 is a partial perspective view of a heat conversion system including a heat conversion device according to an embodiment of the present invention. [Figure 6] 2 is a cross-sectional view of a thermoelectric element included in a thermoelectric module according to an embodiment of the present invention. [Figure 7] 1 is a perspective view of a thermoelectric element included in a thermoelectric module according to an embodiment of the present invention; [Figure 8] 1 is a partial perspective view of a heat exchanger according to an embodiment of the present invention; [Figure 9] 10A and 10B show various variations in height and shape of a gas guide member according to an embodiment of the present invention. [Figure 10] FIG. 10 is a perspective view of a heat exchanger according to another embodiment of the present invention. [Figure 11]11 is a perspective view of a heat conversion system including the heat conversion device of FIG. 10. [Figure 12] 11 is a perspective view of a heat conversion system including the heat conversion device of FIG. 10. [Figure 13] 11 is a perspective view of a heat conversion system including the heat conversion device of FIG. 10. [Figure 14] 11 is a perspective view of a heat conversion system including the heat conversion device of FIG. 10. DETAILED DESCRIPTION OF THE INVENTION

[0041] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0042] However, the technical idea of ​​the present invention is not limited to some of the embodiments described. The present invention may be embodied in various different forms, and the configurations thereof may be interchanged between embodiments within the scope of the present invention. One or more of the elements can be selectively combined or substituted.

[0043] Furthermore, terms (including technical and scientific terms) used in the embodiments of the present invention are expressly and specifically defined. Unless otherwise defined and described, it is understood by those skilled in the art that the present invention pertains to Terms that can be interpreted in a way that is understandable and commonly used, such as dictionary-defined terms, The meaning may be interpreted taking into account the contextual meaning of the relevant art.

[0044] Furthermore, the terms used in the embodiments of the present invention are intended to explain the embodiments and are not intended to limit the present invention. It is not an attempt to limit

[0045] As used herein, the singular can include the plural unless the context clearly dictates otherwise, and includes "A and ( If it says "and) at least one (or more) of B and C," then it means A, B, and C. It may include one or more of all possible combinations.

[0046] In addition, in the description of the components of the embodiment of the present invention, first, second, A, B, (a), (b) Terms such as:

[0047] Such terms are merely used to distinguish the component from other components, and the term The present invention is not limited to the nature, order, or sequence of the relevant components.

[0048] And, when a component is described as being "coupled," "bonded," or "connected" to another component, When a component is connected to, or is directly coupled to, or connected to, any other component, Not only that, but also other components between that component and other components make it " This also includes cases where the terms "connected," "coupled," or "connected" are used.

[0049] It is also described as being formed or placed "above or below" each component. When two components are in direct contact with each other, "up" or "down" refers to the case where two components are in direct contact with each other. In addition, one or more other components may be formed or disposed between the two components. Also, when it is expressed as "upper" or "lower," it is a single component. It can mean not only the upward direction but also the downward direction based on the above.

[0050] FIG. 1 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of a heat exchanger according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view of a heat conversion system including a heat conversion device according to an embodiment of the present invention. FIG. 5 is a partial perspective view of a heat conversion system including a heat conversion device according to an embodiment of the present invention. .

[0051] FIG. 6 is a cross-sectional view of a thermoelectric element included in a thermoelectric module according to an embodiment of the present invention, and FIG. 1 is a perspective view of a thermoelectric element included in a thermoelectric module according to an embodiment of the present invention.

[0052] 1 to 5, the thermal conversion device 1000 includes a duct 1100, a first thermoelectric module 12, and a second thermoelectric module 13. 100, a second thermoelectric module 1300 and a gas guide member 1400. The heat exchange system can include a plurality of the heat exchange devices 1000 shown in FIGS. The thermal conversion devices 1000-1, 1000-2, and 1000-3 are arranged at predetermined intervals. It can be done.

[0053] The heat exchanger 1000 according to the embodiment of the present invention is a cooling device that flows through the inside of the duct 1100. The temperature difference between the operating fluid and the hot gas passing outside the duct 1100 is used to generate electricity. Accordingly, in this specification, the heat conversion device may be referred to as a power generation device. In this specification, the fluid flowing through the inside of the duct 1100 is referred to as the first fluid. The gas passing through the outside of 1100 can be referred to as the second fluid. The temperature of the body may be greater than the temperature of the first fluid.

[0054] For this purpose, the first thermoelectric module 1200 is disposed on one surface of the duct 1100, and the second thermoelectric module The thermoelectric module 1300 may be placed on another surface of the duct 1100. The duct 1100 on both sides of the module 1200 and the second thermoelectric module 1300 The surface facing the center becomes the low-temperature part, and the temperature difference between the low-temperature part and the high-temperature part is used to generate electricity. can be produced.

[0055] The cooling fluid entering the duct 1100 can be, but is not limited to, water. The cooling fluid flowing into the duct 1100 can be any of a variety of fluids with cooling properties. The temperature may be less than 100°C, preferably less than 50°C, and more preferably less than 40°C. However, the cooling fluid discharged after passing through the duct 1100 may be any of the following: The temperature of each duct 110 may be higher than the temperature of the cooling fluid entering the duct 1100. 0 is disposed so as to face the first surface 1110 and be parallel to the first surface 1110. a second surface 1120 disposed between the first surface 1110 and the second surface 1120; and a third surface 1130 disposed between the first surface 1110 and the second surface 1120. and disposed between the first surface 1110 and the second surface 1120 so as to face the third surface 1130. The first surface 1110, the second surface 1120, the third surface 1130 and the fourth surface 1140 are included. The cooling fluid passes through the duct formed by the surface 1140. The cooling fluid flows into the cooling port 1100 through the cooling fluid inlet and is discharged through the cooling fluid outlet. To facilitate the inflow and outflow of the operating fluid and to support the duct 1100, The cooling fluid inlet side and the cooling fluid outlet side of the cooling fluid inlet flange 310 and the cooling fluid outlet flange 311 are provided, respectively. The inlet flange 1500 and the outlet flange 1600 may be further disposed. The flanges 1600 are arranged to correspond to the cooling fluid inlet and the cooling fluid outlet, respectively. The openings formed in the inlet flange 1500 are plate-shaped. The size, shape and position of the cooling fluid inlet of the duct 1100 are the same. An opening (not shown) formed in the outlet flange 1600 is used for cooling the duct 1100. The fluid outlet may be formed to have a matching size, shape and location.

[0056] Although not shown, heat dissipation fins may be arranged on the inner wall of the duct 1100. The shape, number, and area of ​​the inner wall of the duct 1100 are determined based on the temperature of the cooling fluid, the waste heat, etc. The heat dissipation fins can be changed in various ways depending on the temperature of the duct 110, the required power generation capacity, etc. The area of ​​the inner wall of the duct 1100 can be, for example, 1 to 40% of the cross-sectional area of ​​the duct 1100. According to the study, it is possible to obtain high thermoelectric conversion efficiency without interfering with the flow of the cooling fluid. In this case, the heat dissipation fins must have a shape that does not obstruct the flow of the cooling fluid. For example, the heat dissipation fins can be formed along the direction in which the cooling fluid flows. That is, the heat dissipation fin is a plate extending in the direction from the cooling fluid inlet to the cooling fluid outlet. The heat dissipation fins may be arranged at predetermined intervals. The duct 1100 may be integrally formed with the inner wall of the duct.

[0057] The inside of the duct 1100 may be divided into a plurality of regions. When the duct 1100 is divided into multiple regions, the flow rate of the cooling fluid may be increased to fill the inside of the duct 1100. Even if there is not enough cooling fluid to fill the duct 1100, the cooling fluid can be evenly distributed within the duct 1100. It is possible to obtain uniform thermoelectric conversion efficiency over the entire surface of the duct 1100.

[0058] Meanwhile, the first thermoelectric module 1200 is included in the first surface 1110 of the duct 1100. The second thermoelectric module 1300 is disposed on the first surface 1112 facing outward. A second surface 1120 of the duct 1100 is included in the second surface 1120 and is arranged toward the outside of the duct. 122 is arranged symmetrically to the first thermoelectric module 1200.

[0059] Here, the first thermoelectric module 1200 and the second thermoelectric module 1200 are symmetrical. The second thermoelectric module 1300 arranged as above is called a pair of thermoelectric modules or a unit thermoelectric module. It may also be referred to as a rule.

[0060] In this specification, a pair of thermoelectric modules is arranged for each duct 1100 as an example. However, the present invention is not limited to this, and multiple pairs of thermoelectric modules may be provided for each duct 1100. In other words, a plurality of unit thermoelectric modules may be arranged. This allows the size and number of unit thermoelectric modules to be adjusted.

[0061] At this time, at least one of the plurality of first thermoelectric modules 1200 connected to the duct 1100 The sections are electrically connected to each other using bus bars (not shown) and connected to the duct 1100. At least some of the second thermoelectric modules 1300 are connected to other bus bars (not shown). ) can be electrically connected to each other. The bus bar can be used, for example, to The first thermoelectric modules may be disposed on the exhaust port side and connected to external terminals. The PCB for the thermoelectric module 1200 and the plurality of second thermoelectric modules 1300 are provided inside the thermal conversion device. The plurality of first thermoelectric modules 1200 and the plurality of second thermoelectric modules 1201 may be arranged in a 300 can be supplied with power, which simplifies the design and assembly of the heat conversion device.

[0062] The first thermoelectric module 1200 and the second thermoelectric module 1300 are connected by using screws. The first thermoelectric module 1200 and the second thermoelectric module 1200 may be connected to the duct 1100. The electrical module 1300 can be stably coupled to the surface of the duct 1100; or At least one of the first thermoelectric module 1200 and the second thermoelectric module 1300 Using thermal interface material (TIM) It may be glued to the surface of the duct 1100 .

[0063] On the other hand, the first thermoelectric module 1200 and the second thermoelectric module 1300 each have a first Thermoelectric elements 1210, 1310 disposed on the surface 1112 and the second surface 1122, respectively and heat dissipation fins 1220 and 1320 disposed on the thermoelectric elements 1210 and 1310 . At this time, the distance between the first surface 1112 and the first heat dissipation fin 1220 is The distance between the second surface 1122 and the second heat dissipation fin 1320 is greater than the distance between the elements 1210. may be greater than the distance between the second surface 1122 and the thermoelectric element 1310. A duct 1100 through which a cooling fluid flows is arranged on one of the two surfaces of the elements 1210 and 1310. On the other side, heat dissipation fins 1220 and 1320 are arranged. When high-temperature gas passes through the thermoelectric element 1210, 1310, the temperature between the heat absorption surface and the heat radiation surface This can increase the difference, and accordingly, the thermoelectric conversion efficiency can be increased. The heat dissipation fins 1220 and 1320 serve to send out heat. It may refer to not only a fin but also a fin that absorbs heat. 220, 1320 are connected between the plurality of heat conversion devices 1000-1, 1000-2, 1000-3. The high-temperature parts of the thermoelectric elements 1210 and 1310, i.e., the heat-absorbing surfaces, absorb heat from the passing high-temperature gas. Accordingly, the heat dissipation fins 1220 and 1320 can be used as heat receiving fins. Alternatively, they may be referred to as heat absorption fins.

[0064] At this time, the structure of the thermoelectric elements 1210 and 1310 is the same as that of the thermoelectric element 100 illustrated in FIGS. 6 and 7, the thermoelectric device 100 may have a lower substrate 110, a lower A bottom electrode 120, a P-type thermoelectric leg 130, an N-type thermoelectric leg 140, a top electrode 150 and a top The main board 160 is included.

[0065] The lower electrode 120 is connected to the lower substrate 110 and the P-type thermoelectric leg 130 and the N-type thermoelectric leg 140. The upper electrode 150 is disposed between the upper substrate 160 and the P-type thermoelectric leg 130 and and the upper bottom surface of the N-type thermoelectric leg 140. Accordingly, a plurality of P-type thermoelectric legs The thermoelectric legs 130 and the plurality of N-type thermoelectric legs 140 are connected by the lower electrode 120 and the upper electrode 150. The lower electrode 120 and the upper electrode 150 are disposed between the upper electrode 150 and electrically connected to each other. A pair of connected P-type thermoelectric legs 130 and N-type thermoelectric legs 140 forms a unit cell. It is possible.

[0066] For example, a voltage is applied to the lower electrode 120 and the upper electrode 150 through the lead wires 181 and 182. When applied, current flows from the P-type thermoelectric leg 130 to the N-type thermoelectric leg 140. The substrate absorbs heat. The substrate acts as a surface through which current flows from the N-type thermoelectric leg 140 to the P-type thermoelectric leg 130. It can act as a heat dissipation surface.

[0067] Here, the P-type thermoelectric leg 130 and the N-type thermoelectric leg 140 are made of bismuth (Bi) and It can be a bismuth telluride (Bi-Te)-based thermoelectric leg containing tellurium (Ti) as the main raw material. The P-type thermoelectric leg 130 is made of antimony (Sb), nickel, and tantalum (Tb) in a ratio of 100 wt% to the total weight. Ni (Ni), aluminum (Al), copper (Cu), silver (Ag), lead (Pb), boron (B ), gallium (Ga), tellurium (Te), bismuth (Bi) and indium (In) Bismuth telluride (Bi-Te)-based main raw material containing at least one of the following: 99-99. The thermoelectric leg contains 999 wt% of a mixture containing Bi or Te at 0.001 to 1 wt%. For example, if the main raw material is Bi-Se-Te, and Bi or Te accounts for 0.01% of the total weight, The N-type thermoelectric leg 140 may further contain 0.001 to 1 wt% of the total weight of 100 Selenium (Se), nickel (Ni), aluminum (Al), copper (C) u), silver (Ag), lead (Pb), boron (B), gallium (Ga), tellurium (Te), bi Bismuth tellurite containing at least one of smectic (Bi) and indium (In) Bi-Te-based main raw material 99-99.999 wt% and mixtures containing Bi or Te For example, the thermoelectric leg may contain 0.001 to 1 wt% of Bi-Sb- Te, and may further contain Bi or Te in an amount of 0.001 to 1 wt% of the total weight. do.

[0068] The P-type thermoelectric leg 130 and the N-type thermoelectric leg 140 may be formed in a bulk or stacked type. Generally, the bulk type P-type thermoelectric leg 130 or the bulk type N-type thermoelectric leg 140 is a thermoelectric The material is heat treated to produce ingots, which are then crushed and sieved. After obtaining the powder for the thermoelectric leg, it is sintered and the sintered body is cut. The stacked P-type thermoelectric leg 130 or the stacked N-type thermoelectric leg 140 can be obtained in a sheet form. A paste containing a thermoelectric material is applied to the substrate to form unit members, and then the unit members are stacked. It can be obtained through a cutting process.

[0069] At this time, the pair of P-type thermoelectric legs 130 and N-type thermoelectric legs 140 have the same shape and volume. or may have different shapes and volumes. Since the electrical conduction characteristics of the N-type thermoelectric leg 130 and the N-type thermoelectric leg 140 are different, The height or cross-sectional area may be formed differently from the height or cross-sectional area of ​​the P-type thermoelectric leg 130. good.

[0070] The performance of the thermoelectric device according to an embodiment of the present invention can be expressed by a thermoelectric figure of merit. The number (ZT) can be expressed as in Equation 1. Equation 1

[0071] TIFF0007818684000001.tif11158

[0072] where α is the Seebeck coefficient [V / K], σ is the electrical conductivity [S / m], and α 2 σ is the power factor (PowerFactor, [W / mK 2 ]) and T is the temperature , k is the thermal conductivity [W / mK]. k is a·c p ρ, and a is the thermal diffusivity [cm 2 / S] and c p is the specific heat [J / gK] and ρ is the density [g / cm 3 ] .

[0073] To obtain the thermoelectric performance index of the thermoelectric element, a Z meter is used to measure the Z value (V / K). The measured Z value can be used to calculate the thermoelectric figure of merit (ZT).

[0074] According to an embodiment of the present invention, the P-type thermoelectric leg 130 and the N-type thermoelectric leg 140 are shown in FIG. ) Referring to FIG. 6(b), the thermoelectric legs 130, 140 The thermoelectric material layers 132 and 142 are laminated on one surface of the thermoelectric material layers 132 and 142. The layers 134 and 144 are laminated on the other surface of the thermoelectric material layers 132 and 142, which are arranged opposite to one surface of the thermoelectric material layers 132 and 142. the second plating layers 134, 144, the thermoelectric material layers 132, 142 and the first plating layer 134; and between the thermoelectric material layers 132, 142 and the second plating layers 134, 144, respectively. The first bonding layer 136, 146 and the second bonding layer 136, 146 are disposed in a layered manner. The first gold layer is laminated on the plating layers 134, 144 and the second gold layer is laminated on the plating layers 134, 144. The metal layers 138, 148 include a first metal layer 138, 148 and a second metal layer 138, 148.

[0075] Here, the thermoelectric material layers 132 and 142 are made of semiconductor materials, bismuth (Bi) and tellurium ( The thermoelectric material layers 132 and 142 may contain the P-type thermoelectric material described in FIG. It can have the same material or shape as leg 130 or N-type thermoelectric leg 140 .

[0076] The first metal layer 138, 148 and the second metal layer 138, 148 are made of copper (Cu), copper alloy, or the like. It can be selected from gold, aluminum (Al) and aluminum alloys, and has a thickness of 0.1 to 0.5 mm. The first metal layer 138, 14 preferably has a thickness of 0.2 to 0.3 mm. The thermal expansion coefficients of the thermoelectric material layers 132 and 142 are The number of metal layers is similar to or greater than the number of metal layers 138, 148 and the number of metal layers 148, ... 138, 148 and the thermoelectric material layers 132, 142, compressive stress is applied at the interfaces between the The first metal layer 138, 148 and the second metal layer 149 can be prevented from cracking or peeling. The strong bonding strength between the metal layers 138, 148 and the electrodes 120, 150 allows the thermoelectric legs 130, 1 40 can be stably coupled to the electrodes 120, 150.

[0077] Next, the first plating layer 134, 144 and the second plating layer 134, 144 are respectively made of Ni, It may contain at least one of Sn, Ti, Fe, Sb, Cr and Mo, and 1 to The first plating layer 134 may have a thickness of 20 μm, preferably 1 to 10 μm. 144 and the second plating layer 134, 144 are semiconductor materials in the thermoelectric material layers 132, 142. Reaction between Bi or Te and the first metal layer 138, 148 and the second metal layer 138, 148 Therefore, not only can the deterioration of the performance of the thermoelectric element be prevented, but also the first metal layers 138 and 148 Furthermore, oxidation of the second metal layers 138 and 148 can be prevented.

[0078] At this time, the thermoelectric material layers 132, 142 and the first plating layers 134, 144 are Between the first and second plating layers 132, 142 and the second plating layers 134, 144, first bonding layers 136, 146 and The first and second bonding layers 136, 146 may be disposed. The second bonding layers 136, 146 may contain Te. 6 and the second bonding layers 136, 146 are Ni-Te, Sn-Te, Ti-Te, Fe-Te , Sb—Te, Cr—Te, and Mo—Te. According to an embodiment of the present invention, the first bonding layer 136, 146 and the second bonding layer 136, 146 and The thickness of each layer may be 0.5 to 100 μm, preferably 1 to 50 μm. For example, the thermoelectric material layers 132 and 142, the first plating layers 134 and 144, and the second plating layers a first bonding layer 136, a second bonding layer 146, and a second bonding layer 136 containing Te between the layers 134, 144; 146 is placed in advance, and Te in the thermoelectric material layers 132 and 142 is and the second plating layers 134 and 144. The occurrence of i-rich regions can be prevented.

[0079] On the other hand, the lower substrate 110 and the P-type thermoelectric leg 130 and the N-type thermoelectric leg 140 are arranged between the The lower electrode 120 is connected to the upper substrate 160, and the P-type thermoelectric leg 130 and the N-type thermoelectric leg 140 are connected to the upper substrate 160. The upper electrode 150 disposed between the electrodes 140 is made of copper (Cu), silver (Ag), and nickel (N i) and may have a thickness of 0.01 mm to 0.3 mm. When the thickness of the lower electrode 120 or the upper electrode 150 is less than 0.01 mm, If the thickness exceeds 0.3 mm, the resistance will increase and the electrical conductivity will decrease. This can reduce the conduction efficiency.

[0080] The lower substrate 110 and the upper substrate 160 facing each other are insulating substrates or metal substrates. The insulating substrate may be an alumina substrate or a flexible polymer resin substrate. Polymer resin substrates with this property include polyimide (PI), polystyrene (PS), and polymethylmethacrylate (PMMA). Poly(methyl methacrylate) (PMMA), Cyclic olefin copolymer (COC), Poly(ethylene terephthalate) Various high-transmittance plastics such as PET and resin The metal substrate may contain Cu, Al or a Cu-Al alloy. The thickness of the metal substrate can be 0.1 mm to 0.5 mm. If it is less than 0.5mm or exceeds 0.5mm, the heat dissipation characteristics or thermal conductivity may become excessively high. In addition, since the lower substrate 110 and the upper substrate 160 are made of metal, the reliability of the thermoelectric element may be reduced. In the case of a substrate, the lower substrate 110 and the lower electrode 120 are connected to the upper substrate 160 and the upper electrode 170. A dielectric layer 170 may be further formed between the layers 150. The dielectric layer 170 may have a thickness of 5 to 1 It contains a material with a thermal conductivity of 0 W / mK and is formed with a thickness of 0.01 mm to 0.15 mm. If the thickness of the dielectric layer 170 is less than 0.01 mm, the insulation efficiency or the withstand voltage characteristics may be reduced. If the thickness exceeds 0.15 mm, the thermoelectric conductivity may decrease, resulting in a decrease in heat dissipation efficiency. .

[0081] In this case, the lower substrate 110 and the upper substrate 160 may be formed to have different sizes. For example, the volume, thickness or area of ​​one of the lower substrate 110 and the upper substrate 160 is smaller than that of the other. The volume, thickness or area of ​​the thermoelectric element can be increased. Heat dissipation performance can be improved.

[0082] In addition, a heat dissipation pattern is formed on the surface of at least one of the lower substrate 110 and the upper substrate 160. For example, a concave-convex pattern may be formed. This improves the heat dissipation performance of the thermoelectric element. When the concave-convex pattern comes into contact with the P-type thermoelectric leg 130 or the N-type thermoelectric leg 140, When formed on a surface that is also called a thermoelectric leg, the bonding properties between the thermoelectric leg and the substrate may also be improved.

[0083] On the other hand, the P-type thermoelectric leg 130 or the N-type thermoelectric leg 140 may have a cylindrical shape, a polygonal prism shape, an elliptical shape, or the like. It may have a cylindrical shape or the like.

[0084] According to one embodiment of the present invention, the P-type thermoelectric leg 130 or the N-type thermoelectric leg 140 is an electrode. The width of the joining portion may be made wider.

[0085] At this time, the lower substrate 110 disposed on the duct 1100 is made of aluminum substrate 1212, 1 312, and the aluminum substrate 1212, 1312 has a first surface 1112 and a second surface 1312. The surfaces 1122 and the thermal interface material The aluminum substrates 1212 and 1312 have good heat transfer properties. Because of its excellent thermal conductivity, one of the two surfaces of the thermoelectric elements 1210 and 1310 is connected to the duct through which the cooling fluid flows. Heat transfer between the aluminum substrates 1212 and 1312 and the cooling The duct 1100 through which the cooling fluid flows is made of a thermal interface material. When bonded with a TIM (terial, TIM), the aluminum substrate 1212, 1312 Heat transfer between the ducts 1100 through which the cooling fluid flows can be unimpeded.

[0086] Referring again to FIGS. 1-5, the cooling fluid passes through the duct 1100 in a first direction and the gas passes through the duct 1100 in a second direction. A plurality of electrodes are arranged in a direction perpendicular to the first direction and parallel to the first surface 1112 and the second surface 1122. It can pass through the heat exchangers 1000-1, 1000-2, and 1000-3. Therefore, the gas guide member 1400 is provided for each duct 1100 or for each duct 110 A plurality of such nozzles may be arranged at every 100° C., and may be arranged in the direction in which high-temperature gas flows in. For example, The third surface 1130 of the pipe 1100 faces the direction in which the hot gas flows in, and the fourth surface 1140 faces When the gas guide member 1400 is arranged so as to face the direction in which the high-temperature gas is discharged, The gas guide member 1400 may be disposed on the third surface 1130 side of the duct 1100. It can also be arranged on the fourth surface 1140 of the duct 1100 according to pneumatic principles.

[0087] At this time, the space between the plurality of heat exchangers 1000-1, 1000-2, and 1000-3 is The temperature of the gas flowing between the plurality of heat exchangers 1000-1, 1000-2, 1000- 3. For example, the temperature of the gas discharged from the space between the plurality of heat exchangers 1 The gas flowing into the space between 000-1, 1000-2, and 1000-3 is from the automobile, It can be, but is not limited to, waste heat generated from engines of ships, etc. For example, the space between the plurality of heat exchangers 1000-1, 1000-2, and 1000-3 The temperature of the gas flowing into the reactor is 100°C or higher, preferably 200°C or higher, and more preferably 22 The temperature may be 0°C to 250°C, but is not limited thereto. The width of the space between the positions 1000-1, 1000-2, and 1000-3 is within a few mm. The size of the heat conversion device, the temperature of the inflowing gas, the inflow velocity of the gas, the required amount of power generation, etc. Here, the plurality of thermal conversion devices 1000-1, 1000-2, 1000 The space between the first and second thermoelectric modules 1300 and 1301 is for radiating the second thermoelectric module 1300 of one heat exchanger 1000. The heat fin 1320 is connected to the heat dissipation fin of the first thermoelectric module 1200 of the heat exchange device 1000 adjacent to the heat fin 1320. For example, referring to FIG. 4, a plurality of heat exchange devices 10 The space (a) between 00-1, 1000-2, and 1000-3 is preferably 10 mm or less. The thickness may be 5 mm or less, and more preferably 3 mm or less. The heat dissipation fins 1320 of the second thermoelectric module 1300 and the first heat exchanger 1000 adjacent to each other The heat dissipation fins 1220 of one thermoelectric module 1200 may be in contact with each other, but However, there may be a tolerance in the space where the heat dissipation fins 1220 and 1320 are arranged. The distance between the plurality of heat exchangers 1000-1, 1000-2, and 1000-3 is smaller than the pressure. The hydraulic pressure in the space (a) may be low, and as a result, the plurality of heat exchangers 1000-1, 1 The gas flowing between 000-2 and 1000-3 is smaller than that between fins 1220 and 1320. (a) Separate spaces between the multiple heat exchangers 1000-1, 1000-2, and 1000-3 The heat exchanger 1000-1, 1000-2, 100 A vortex may occur in the space (a) between the heat exchangers 10-3. The separation distance (a) between 000-1, 1000-2, and 1000-3 exceeds 10 mm In this case, the efficiency of heat exchange between the inflowing gas and the heat dissipation fins 1220 and 1320 may be reduced. In addition, the space between the plurality of heat exchangers 1000-1, 1000-2, and 1000-3 is The larger (a), the fewer number of heat exchangers that can be installed in a given space. Accordingly, the distance between the plurality of heat exchangers 1000-1, 1000-2, and 1000-3 is The space (a) is 10 mm or less, preferably 5 mm or less, and more preferably 3 mm or less. could be.

[0088] The gas guide member 1400 is included in the third surface 1130 of the duct 1100 and is directed toward the outside of the duct. On the third surface 1132, from both ends of the third surface 1132 to the center between both ends of the third surface 1132 The distance from the third surface 1132 may be increased as the distance increases. The body guide member 1400 may have an umbrella or roof shape. The heat exchanger 1000 is connected to the gas guide member 1400. It can be guided to pass through the space between -1, 1000-2, and 1000-3. At this time, the inclination angle θ of the gas guide member 1400 is 10 to 80°, preferably 20 to 70°, The angle may be more preferably 30 to 65°, and even more preferably 45 to 60°. If the inclination angle θ of the gas guide member 1400 is outside this range, If the inclination angle θ of 0 exceeds the upper limit of this range, the gas flowing in will After flowing along the material 1400, it leaves the area where the heat dissipation fins 1220 and 1320 are arranged. (a) Separate spaces between the multiple heat exchangers 1000-1, 1000-2, and 1000-3 In addition, the gas may flow in a direction opposite to the inclination angle θ of the gas guide member 1400. If the numerical value falls outside this range, for example, the inclination angle θ of the gas guide member 1400 is If the value is below the lower limit of the range, it may be difficult to manufacture the gas guide member 1400. The height of the heat exchanger is too high, and the heat of the gas is absorbed through the gas guide member 1400. Therefore, the heat exchange efficiency may be low.

[0089] At this time, the gas guide member 1400 is formed as a pair of thermoelectric modules 1200 and 1300. A plurality of pairs of thermoelectric modules 1100 may be arranged in series on one duct 1100. It may be formed in units of 200 or 1300.

[0090] Meanwhile, in one heat conversion device 1000, the first heat dissipation fin 12 of the first thermoelectric module 1200 The width W1 between the outside of the second thermoelectric module 1300 and the outside of the second heat dissipation fin 1320 of the second thermoelectric module 1300 may be greater than the width W2 of the gas guide member 1400. The width W3 between the outside of the second thermoelectric element 1310 and the outside of the second thermoelectric element 1310 is equal to or greater than the width of the gas guide member 1400. Here, the outer side of the first heat dissipation fin 1220 and the outer side of the second heat dissipation fin 1320 may be Each of these may refer to the opposite side facing the duct 1100. Similarly, the first thermoelectric element 1 The outside of the second thermoelectric element 1310 and the outside of the second thermoelectric element 1310 are opposite to the side facing the duct 1100. Here, the first heat dissipation fin 1220 and the second heat dissipation fin 1320 are For example, the first heat dissipation fin 1220 and the second heat dissipation fin 1221 may be formed in a direction that does not obstruct the flow. The fins 1320 may have a plate shape extending along the second direction in which the gas flows. Alternatively, the first heat dissipation fins 1220 and the second heat dissipation fins 1320 are arranged in a second direction in which the gas flows. The shape may be folded so that a flow path is formed along the At this time, the first heat dissipation fin 1220 of the first thermoelectric module 1200 and the second thermoelectric module 130 The maximum width W1 between the second heat dissipation fins 1320 is The distance from the farthest point of the fin 1220 to the farthest point of the second heat dissipation fin 1320 is The maximum width W2 of the gas guide member 1400 is the third surface 1132 of the duct 1100. This may refer to the width of the gas guide member 1400 at its closest point in the second direction. The flow of the inflowing gas is not obstructed by the gas guide member 1400, and the first heat dissipation fin 1 220 and the second heat dissipation fin 1320. Accordingly, the gas and the first heat dissipation The contact area between the fin 1220 and the second heat dissipation fin 1320 is increased, and the first heat dissipation fin The amount of heat received by the first fin 1220 and the second fin 1320 from the gas increases, and the power generation efficiency increases. It can become.

[0091] At this time, the vertical distance d between the gas guide member 1400 and the heat dissipation fins 1220 and 1320 is 10 mm or more, preferably 15 mm or more, and more preferably 17 mm or more. According to this, the gas guide member 1400, the duct 1100, the first thermoelectric module 1200, and A space for fastening the second thermoelectric module 1300 may be secured, and the gas guide member 1400 may be secured. The gas branched by the In particular, the gas guide member 1400 and the heat dissipation fins 1220, 1 The longer the vertical distance d between the gas guide members 1400, the The heat can pass through the first heat dissipation fin 1220 and the second heat dissipation fin 1320 efficiently without flow resistance. However, the gap between the gas guide member 1400 and the heat dissipation fins 1220 and 1320 If the vertical distance d is too long, the height of the heat exchanger will be too high, resulting in a limited The number of heat exchange devices that can be arranged in the space can be reduced, and the gas can be distributed through the gas guide member 1400. The heat of the branched gas can be cooled before passing through the heat dissipation fins 1220 and 1320, so that the heat exchange As a result, the efficiency of the gas guide member 1400 and the heat dissipation fins 1220 and 13 The vertical distance d between the two is 200 mm or less, preferably 150 mm or less, and more preferably 1 00mm or less.

[0092] On the other hand, the first thermoelectric module 1200, the duct 1100, and the second thermoelectric module 1300 To improve the sealing and insulating effect between the third surface 1132 of the duct 1100 and the air A heat insulating member 1700 and a shielding member 1800 are further disposed between the body guide members 1400. It can be placed.

[0093] The insulating member 1700 includes a first insulating surface 1710 disposed on the third surface 1132, a first insulating surface 1712 disposed on the third surface 1132, and a second insulating surface 1713 disposed on the third surface 1132. 10 in a direction parallel to the first surface 1112 and contacts a part of the first surface 1112 or the first thermoelectric A second insulating surface 1720 and a second insulating surface 1710 are disposed on a portion of the element 1200. A portion of the second surface 1122 or the second thermoelectric element 1300 extends in a direction parallel to the surface 1122. The third insulating surface 1730 may be disposed in a portion of the first thermoelectric element 12. A part of the first thermoelectric element 1200 and a part of the second thermoelectric element 1300 are connected to the first thermoelectric element 1200 and the second thermoelectric element 1300, respectively. 2 may refer to the lower substrate of the thermoelectric element 1300, and the lower substrate may be an aluminum plate. .

[0094] The shield member 1800 has a first shield surface 181 disposed on the first heat insulating surface 1710. 0, extending from the first shield surface 1810 in a direction parallel to the first surface 1112 to form the second heat insulating surface 17 20 and the second shield surface 1820 and the first shield surface 181 0 in a direction parallel to the second surface 1122 and disposed on at least a portion of the third insulating surface 1730. The shield may include a third shield surface 1830 positioned on the shield.

[0095] In particular, the second shield surface 1820 and the third shield surface 1830 are respectively connected to the first thermoelectric element 1. 210 and the first heat dissipation fin 1220 and the boundary between the second thermoelectric element 1310 and the second heat dissipation fin 1320.

[0096] According to this, high-temperature gas passing between the plurality of thermal conversion devices 1000 is transferred to the first thermoelectric module. The heat dissipation fins 1220 and 1320 of the first thermoelectric module 1200 and the second thermoelectric module 1300 are passed through the The first thermoelectric module 1200 and the second thermoelectric module 1300 only pass through the This prevents the problem of direct contact with the thermoelectric elements 1210 and 1310, and The side surface of the first thermoelectric module 1200, the third surface 1130, and the second thermoelectric module 1200 are connected to the first thermoelectric module 1400. The sides of the module 1300 can be insulated to prevent the problem of a decrease in thermoelectric conversion performance. It is possible.

[0097] On the other hand, the gas guide member 1400, the first shield surface 1810, the first heat insulating surface 1710 and the The third surfaces 1132 of the connectors 1100 may be fastened together, thereby forming a gas guide member 140. An air layer may be formed between the first shield surface 1810 and the second shield surface 1810. The heat insulating performance can be further improved by the air layer between the first shield surface 1810 and the second shield surface 1810. do.

[0098] Alternatively, in order to further improve the heat insulating performance, the first heat insulating surface 1710 and the first shield surface 1810 An additional insulating member 1740 may further be placed in between.

[0099] Alternatively, although not shown, one surface of the gas guide member 1400 may extend to have a hollow triangular shape. and accordingly, may be joined to the first shield surface 1810. .

[0100] Meanwhile, according to the embodiment of the present invention, the height and shape of the gas guide member 1400 may be variously changed. It can be done.

[0101] FIG. 8 is a partial perspective view of a heat exchanger according to an embodiment of the present invention, and FIG. 9 is a partial perspective view of a heat exchanger according to an embodiment of the present invention. 10 shows various modifications regarding the height and shape of the gas guide member according to the present invention.

[0102] 9(a) and 9(b), the height of the gas guide member 1400 is related to the gas flow rate. For example, the flow rate of the gas passing between the plurality of heat exchange devices 1000 is high. As shown in FIG. 9(a), it is advantageous for the gas guide member 1400 to be tall. As shown in FIG. 9(b), the lower the flow velocity, the lower the height of the gas guide member 1400. can be advantageous.

[0103] Alternatively, as shown in FIG. 9(c) and FIG. 9(d), the gas guide member 1400 may have a curved surface. For example, as shown in FIG. 9(c), the gas guide member 1400 has a slope that increases from the center to the edge. The gas guide member 1400 may have a dome shape with a high inclination, or as shown in FIG. 9(d), The shape may have a slope that becomes gentler from the center to the edge.

[0104] In this way, the height and shape of the gas guide member 1400 can be adjusted to suit the flow rate and flow velocity of the gas. As described above, the gas guide member 1400 can be modified as desired. The shielding member 1800, the heat insulating member 1700, and the duct 110 are connected through the formed holes. When fastened with screws, etc., the gas guide part is suitable for the gas flow rate and flow velocity. The material 1400 can be replaced.

[0105] On the other hand, in the above description, the fluid inlet and outlet of the duct 1100 of the heat exchanger 1000 are Although the flanges 1500 and 1600 are formed on the respective ends in the illustrated example, there is no restriction to this. It is not limited to:

[0106] FIG. 10 is a perspective view of a heat exchanger according to another embodiment of the present invention, and FIGS. 11 to 14 are views of the heat exchanger shown in FIG. 10. 1 to 9. FIG. 1 is a perspective view of a heat exchange system including the heat exchange device. Duplicate explanations will be omitted.

[0107] Referring to FIG. 10, a heat exchanger 1000 is disposed at one end of a duct 1100. A fluid inlet 1900 into which the body flows and a cooling fluid are arranged at the other end of the duct 1100. The fluid inlet 1950 may further include a fluid outlet 1950. At least one fluid inlet pipe 1902 is connected to the fluid outlet portion 1950. At least one fluid outlet 1952 may be connected.

[0108] Meanwhile, referring to FIGS. 11 to 13, the first thermal exchange device 1000-1 and the second thermal exchange device 1000-2 can be supported by the frame 3000. At this time, the frame 3000 Openings 3100, 3102 are formed on both sides in the second direction for the body to pass through, and a cooling fluid is Openings 3200 and 3202 may be formed on both sides in the first direction so that the heat exchanger 3200 can pass through. The fluid inlet pipe 1902 of the exchange device 1000 passes through the opening 3200, and the fluid outlet pipe 1952 passes through the opening The port 3202 can be penetrated.

[0109] Meanwhile, referring to FIG. 11, the thermal conversion system 10 according to the embodiment of the present invention includes a frame 30. The gas of the first heat exchanger 1000-1 and the second heat exchanger 1000-2 is a first inclined member 2000 disposed so as to be inclined to one side of the guide member 1400; The first thermal exchange device 1000-1 and the second thermal exchange device 1000-2 are connected to the other wall surface of the frame 3000. The second inclined member 21 is arranged to incline to the other side of the gas guide member 1400 of 0-2. It may further include 00.

[0110] At this time, one wall surface of the frame 3000 is a wall surface in which the opening 3200 is formed, and The other wall surface of the frame 3000 may be a wall surface in which the opening 3202 is formed, and one wall surface of the frame 3000, First inclined member 2000, gas guide member 1400, second inclined member 2100, and frame The other wall surfaces of 3000 may be arranged sequentially along the first direction.

[0111] The first inclined member 2000 and the second inclined member 2100 The high-temperature gas flowing into the area is directed toward the area where the thermoelectric modules 1200 and 1300 are arranged. The first inclined portion can be guided in this manner, and thus the power generation efficiency can be improved. The first inclined member 2000 and the second inclined member 2100 may each be referred to as a guide portion.

[0112] In particular, in embodiments where the heat exchange device 1000 includes a fluid inlet 1900 and a fluid outlet 1950 The first inclined member 2000 is connected to one wall of the frame 3000 and the duct 1100 and the fluid inlet portion. 1900, and the second inclined member 2100 extends from the other wall surface of the frame 3000. If the flow path extends from the duct 1100 to the boundary between the duct 1100 and the fluid outlet 1950, the hot gas will flow. Since the flow to the body inlet 1900 and the fluid outlet 1950 can be blocked, The power generation efficiency can be maximized. The second inclined member 1400 and the second inclined member 2100 are arranged so as not to overlap each other in the first direction, The inclined surface of the first inclined member 2000, the inclined surface of the gas guide member 1400, and the inclined surface of the second inclined member 2100 The ramps may be arranged so as not to overlap one another in the second direction.

[0113] At this time, the inclined surface of the gas guide member 1400 is inclined relative to the first inclined member 2000 and the second inclined member 2000. Each of the 100 inclined surfaces may be inclined in a different direction, for example, in the first direction in which the first fluid flows. and a third direction perpendicular to the second direction in which the second fluid flows, i.e., a plurality of heat exchange devices are arranged. The first inclination member 2000 and the second inclination member 2002 are inclined relative to a virtual plane formed by the inclined direction and the first direction. 100 Each inclined surface is arranged to be inclined with respect to an imaginary line extending in a first direction, and The inclined surface of the guide member 1400 may be arranged to be inclined with respect to an imaginary line extending in the third direction. Accordingly, the inclined surfaces of the first inclined member 2000 and the second inclined member 2100 are The inclined surface of the gas guide member 1400 is inclined so that the second fluid flows in the second direction. It may be angled to diverge and flow along a second direction.

[0114] 12, the thermal conversion system 10 according to the embodiment of the present invention includes a frame 30. 1000-1 toward one side of the gas guide member 1400 of the first heat exchanger 1000-1. The third inclined member 2200 is disposed so as to be inclined in the direction of the arrow A. The third inclined member 2200 is disposed so as to be inclined in the direction of the arrow B ... The gas guide member 1400 of the second heat exchanger 1000-2 is inclined from the first heat exchanger 1000-1 to the other side of the gas guide member 1400 of the second heat exchanger 1000-2. The fourth inclined member 2300 may further be disposed on the

[0115] At this time, one wall surface of the frame 3000 is spaced a predetermined distance from the first heat exchanger 1000-1. The surface may be arranged parallel to the thermoelectric module of the thermal conversion device 1000-1. The other wall surface of the frame 3000 faces the one wall surface of the frame 3000, and the second heat exchanger 1000 -2 and in parallel with the thermoelectric module of the second heat conversion device 1000-2 at a predetermined distance. That is, one wall surface and the other wall surface of the frame 3000 may be arranged as shown in FIG. A wall disposed between the wall surfaces on which the first inclined member 2000 and the second inclined member 2100 are disposed. Accordingly, one wall surface of the frame 3000, the third inclined member 2200, the first heat The gas guide member 1400 of the first thermal conversion device 1000-1 and the gas guide member 1400 of the second thermal conversion device 1000-2 The other wall surfaces of the guide member 1400, the fourth inclined member 2300, and the frame 3000 are in the first direction. The first and second directions may be arranged sequentially along a direction perpendicular to the first direction.

[0116] The third inclined member 2200 and the fourth inclined member 2300 allow the inside of the thermal conversion system 10 to be The high-temperature gas flowing into the area is directed toward the area where the thermoelectric modules 1200 and 1300 are arranged. The third inclined portion can be guided in this manner, and the power generation efficiency can be improved. The first inclined member 2200 and the fourth inclined member 2300 may each be referred to as a guide portion.

[0117] 13, the thermal conversion system 10 according to the embodiment of the present invention includes a frame 30. The first inclination member 2000, the second inclination member 2100, and the third inclination member 2200 are arranged on the four walls of the It may include a first angled member 2200 and a fourth angled member 2300 .

[0118] 11 to 13, the first inclined member 2000, the second inclined member 2100, and the third inclined member 2200 The fourth inclined member 2300 is shown as being coupled to the inner wall surface of the frame 3000. However, the present invention is not limited to this, and the first inclination member 2000 and the second inclination member 21 At least one of the third inclined member 2200 and the fourth inclined member 2300 is a frame. The connection may be made through the outer wall surface of the frame 3000.

[0119] 11 to 13 show a heat conversion system including two heat conversion devices. It is to be understood that the present invention is not limited to the above and may include more than two heat exchangers, as shown in FIG. According to this, the first inclination member 2000 and the second inclination member 2100 are configured to have n heat exchangers. The length along the direction in which the device is arranged, i.e., the third direction perpendicular to the first and second directions. It may be extended.

[0120] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will appreciate that This application is hereby incorporated by reference in its entirety without departing from the spirit and scope of the present invention as set forth in the following claims. It will be understood that the invention is susceptible to numerous modifications and variations.

Claims

1. a duct through which a cooling fluid passes in a first direction; a first thermoelectric module including a first thermoelectric element disposed on a first surface of the duct and a first heat dissipation fin disposed on the first thermoelectric element; a second thermoelectric module including a second thermoelectric element disposed on a second surface of the duct that is parallel to the first surface of the duct, and a second heat dissipation fin disposed on the second thermoelectric element; a gas guide member disposed on a third surface of the duct disposed between the first surface and the second surface; and a heat insulating member and a shielding member disposed between the third surface and the gas guide member; the gas guide member includes a region in which a distance from the first surface and the second surface to the third surface increases as the distance from the second surface increases toward a center of the third surface, a width between an outer side of the first heat dissipation fin and an outer side of the second heat dissipation fin is greater than a width of the gas guide member; A thermal conversion device, wherein one region of the gas guide member, which is arranged to correspond to the center of the third surface, branches the incoming gas toward the first thermoelectric module and the second thermoelectric module.

2. a distance between the first surface and the first heat dissipation fin is greater than a distance between the first surface and the first thermoelectric element; The thermal exchange device according to claim 1 , wherein the distance between the second surface and the second heat dissipation fin is greater than the distance between the second surface and the second thermoelectric element.

3. The thermal exchange device according to claim 2 , wherein a width between an outer side of the first thermoelectric element and an outer side of the second thermoelectric element is equal to or greater than a width of the gas guide member.

4. The heat exchanger according to claim 1 , wherein the gas guide member is further disposed on a fourth surface disposed between the first surface and the second surface and parallel to the third surface.

5. the heat insulating member includes a first heat insulating surface disposed on the third surface, a second heat insulating surface extending from the first heat insulating surface in a direction parallel to the first surface and disposed on a part of the first surface or a part of the first thermoelectric element, and a third heat insulating surface extending from the first heat insulating surface in a direction parallel to the second surface and disposed on a part of the second surface or a part of the second thermoelectric element, The thermal conversion device of claim 1, wherein the shield member includes a first shield surface disposed on the first insulating surface, a second shield surface extending from the first shield surface in a direction parallel to the first surface and disposed on at least a portion of the second insulating surface, and a third shield surface extending from the first shield surface in a direction parallel to the second surface and disposed on at least a portion of the third insulating surface.

6. The thermal exchange device of claim 5 , wherein the gas guide member, the first shield surface, the first insulating surface, and the third surface are fastened together.

7. The thermal exchange device according to claim 5 , wherein an air layer is formed between the gas guide member and the first shield surface.

8. a first heat exchange device; a second heat exchanger arranged parallel to the first heat exchanger and spaced a predetermined distance from the first heat exchanger; a frame supporting the first heat exchanger and the second heat exchanger; Each of the first heat exchange device and the second heat exchange device is a duct through which a cooling fluid passes in a first direction; a first thermoelectric module including a first thermoelectric element disposed on a first surface of the duct and a first heat dissipation fin disposed on the first thermoelectric element; a second thermoelectric module including a second thermoelectric element disposed on a second surface of the duct that is parallel to the first surface of the duct, and a second heat dissipation fin disposed on the second thermoelectric element; a gas guide member disposed on a third surface of the duct spaced apart from the third surface and disposed between the first surface and the second surface; and a heat insulating member and a shielding member disposed between the third surface and the gas guide member; the gas guide member includes a region in which a distance from the first surface and the second surface to the third surface increases as the distance from the second surface increases toward a center of the third surface, a width between an outer side of the first heat dissipation fin and an outer side of the second heat dissipation fin is greater than a width of the gas guide member; a region of the gas guide member disposed to correspond to a center of the third surface branches the incoming gas toward the first thermoelectric module and the second thermoelectric module; The frame is perpendicular to the first direction so that the gas passes through, and openings are formed on both sides in a second direction parallel to the first surface and the second surface, and openings are formed on both sides in the first direction so that the cooling fluid passes through.

9. a first inclined member disposed so as to be inclined from one wall surface of the frame to one side of the gas guide member of the first heat exchange device and the second heat exchange device, and a second inclined member disposed so as to be inclined from another wall surface of the frame to the other side of the gas guide member of the first heat exchange device and the second heat exchange device, The thermal conversion system according to claim 8 , wherein the one wall surface of the frame, the first inclined member, the gas guide member, the second inclined member, and the other wall surface of the frame are arranged in sequence along the first direction.

10. each of the first heat exchange device and the second heat exchange device further includes a fluid inlet portion disposed at one end of the duct and into which the cooling fluid flows, and a fluid outlet portion disposed at the other end of the duct and through which the cooling fluid is discharged; the first inclined member extends from one wall surface of the frame toward a boundary between the duct and the fluid inlet portion; The heat exchange system according to claim 9 , wherein the second inclined member extends from the other wall surface of the frame toward the boundary between the duct and the fluid discharge portion.

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