Heat recovery system

Abstract

The utility model discloses a heat recovery system, which comprises a heating main body with a heat dissipation surface; the hot end of the thermoelectric power generation sheet is attached to the heat dissipation surface; the cooling sleeve sleeves the heating main body and the thermoelectric power generation sheet, the cold end of the thermoelectric power generation sheet is in heat conduction connection with the cooling sleeve, and the cooling sleeve is used for cooling the cold end of the thermoelectric power generation sheet; and the thermoelectric power generation sheet is electrically connected with the power utilization module, and the thermoelectric power generation sheet is used for converting heat generated by the heating main body into electric energy so as to supply power to the power utilization module. In addition, the cooling sleeve is of an integrated structure and is arranged outside the heating body in a sleeving mode, different cooling plates do not need to be positioned many times, the cooling sleeve is reliably fixed in the radial direction of the heating body all the time, stable and reliable connection can be achieved without traditional installation of the cooling plates through punching bolts, and installation convenience is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of waste heat recovery, and in particular to a heat recovery system. Background Art

[0002] At present, most driving devices in industrial production will generate a lot of heat during operation, such as compressors, condensers, etc. This part of heat is usually discharged into the air through natural cooling or water cooling, resulting in direct waste of energy.

[0003] There are some technical solutions in the prior art for heat recovery and utilization through thermoelectric power generation sheets, but usually the fixing structure of the thermoelectric power generation sheets is relatively complex, the installation process is cumbersome, and there is a risk of the thermoelectric power generation sheets falling off. Utility Model Content

[0004] The present application provides a heat recovery system to solve the technical problems of inconvenient installation and unstable structure in the current heat recovery through thermoelectric power generation sheets.

[0005] To this end, the present application provides a heat recovery system, which includes:

[0006] include:

[0007] A heat-generating body having a heat-dissipating surface;

[0008] A thermoelectric power generation sheet, wherein the hot end of the thermoelectric power generation sheet is attached to the heat dissipation surface;

[0009] A cooling jacket, which is sleeved on the outside of the heat generating body and the thermoelectric power generation sheet, the cold end of the thermoelectric power generation sheet is thermally connected to the cooling jacket, and the cooling jacket is used to cool the cold end of the thermoelectric power generation sheet;

[0010] The power module is electrically connected to the thermoelectric power generation sheet, and the thermoelectric power generation sheet is used to convert the heat generated by the heat generating body into electrical energy to supply power to the power module.

[0011] To implement the above technical solution, on the one hand, the cooling jacket is an integrated structure and is mounted on the outside of the heat generating body. There is no need to use multiple cooling plates for fixing as in the traditional solution. Therefore, there is no need to position different cooling plates multiple times to ensure the accuracy of the positions of different cooling plates, and the installation process is simple and convenient. On the other hand, due to the integration of the cooling jacket and the design of the mounting, the cooling jacket is always fixed in the radial direction of the heat generating body, and the fixed connection relationship between the temperature difference power generation sheet and the cooling surface is used to provide a limited fixation of the cooling jacket along the axial direction of the heat generating body. There is no need to use punched bolts to fix the cooling plate as in the traditional installation, and a relatively stable and reliable connection can be achieved, further improving the convenience of installation. In particular, when some drive devices are working and the vibration conditions are relatively strong, this setting can ensure the reliable fixation of the temperature difference power generation sheet and the stability of heat recovery.

[0012] As one of the optional embodiments of the present application, at least a portion of the cooling jacket extends along the circumference of the heat-generating body to form an annular structure connected end to end.

[0013] The implementation of the above technical solution shows that the cooling jacket has a partially integrated annular structure, which further improves the reliability of the radial limiting fixation of the cooling jacket itself.

[0014] As one of the optional embodiments of the present application, the heat recovery system has a first direction and a second direction intersecting each other, the axis of the cooling jacket is parallel to the first direction, and the cooling jacket comprises:

[0015] An inner cylinder is sleeved on the outside of the heat generating body, and the inner wall surface of the inner cylinder forms the cooling surface;

[0016] An outer cylinder is sleeved on the outer side of the inner cylinder, and the inner cylinder and the outer cylinder are spaced apart along the second direction;

[0017] A first sealing plate and a second sealing plate, wherein the first sealing plate and the second sealing plate are respectively sealed and fixed at two ends of the inner tube and the outer tube in a first direction;

[0018] The inner cylinder, the outer cylinder, the first sealing plate and the second sealing plate together form the cooling chamber.

[0019] To implement the above technical solution, the cooling cavity is a connected annular cavity, which can increase the contact area between the cooling medium inside the cooling jacket and the external air, so as to improve the cooling efficiency.

[0020] As one of the optional embodiments of the present application, the cooling jacket has a cooling surface facing the thermoelectric power generation sheet, and the cooling surface is in contact with the cold end plane of the thermoelectric power generation sheet.

[0021] The implementation of the above technical solution can make the cooling surface and the temperature difference power generation sheet fit better and more comprehensively, facilitate installation, increase the cooling area and improve power generation efficiency.

[0022] As one of the optional implementation schemes of the present application, the hot end of the temperature difference power generation sheet is fixedly connected to the heat dissipation surface via a first thermal conductive adhesive layer.

[0023] As one of the optional implementation schemes of the present application, the cold end of the temperature difference power generation sheet is bonded to the cooling surface via a second thermal conductive adhesive layer.

[0024] To implement the above technical solution, the first thermally conductive adhesive and the second thermally conductive adhesive provide a fixing effect between the components on the one hand, and on the other hand, the first thermally conductive adhesive and the second thermally conductive adhesive can effectively improve the heat transfer efficiency and improve the power generation efficiency.

[0025] As one of the optional implementation schemes of the present application, a gap is formed between the cooling surface and the heat dissipation surface, and the gap is filled with a heat insulation layer.

[0026] By implementing the above technical solution, the heat insulation layer reduces the influence between adjacent thermoelectric power generation sheets, so that the output voltage between each thermoelectric power generation sheet is relatively stable.

[0027] As one of the optional embodiments of the present application, a cooling cavity for cooling medium to flow through is provided in the cooling jacket, an inlet and an outlet connected to the cooling cavity are provided on the cooling jacket, and the heat recovery system also includes a cooling circulation module, the cooling circulation module includes a pump, and the inlet and outlet of the pump are respectively connected to the outlet and the inlet.

[0028] As one of the optional embodiments of the present application, the cooling circulation module further includes a liquid storage tank, which is disposed between the pump and the inlet, and is communicated with the pump and the inlet respectively.

[0029] By implementing the above technical solution, the cooperation between the pump and the liquid storage tank can improve the cooling efficiency of the cold end of the thermoelectric power generation sheet, so that the temperature difference between the cold end and the hot end of the thermoelectric power generation sheet is maintained in a larger range, thereby improving the power generation efficiency.

[0030] As one of the optional embodiments of the present application, the power consumption module includes the pump and / or other loads.

[0031] The heat recovery system also includes a voltage stabilizing module, which is electrically connected to the thermoelectric power generation sheet and the power consumption module respectively. The heat recovery system also includes a voltage stabilizing module, which is electrically connected to the thermoelectric power generation sheet and the power consumption module respectively.

[0032] As one of the optional embodiments of the present application, the heat recovery system includes multiple groups of thermoelectric power generation sheet groups, each of the thermoelectric power generation sheet groups includes multiple thermoelectric power generation sheets, each of the thermoelectric power generation sheet groups, the voltage stabilizing module and the power consumption module are connected in series in sequence, and each thermoelectric power generation sheet in each of the thermoelectric power generation sheet groups is connected in parallel with each other.

[0033] One of the above technical solutions has the following advantages or beneficial effects:

[0034] On the one hand, the cooling jacket is an integral structure and is integrally mounted on the outside of the heating body. There is no need to position different cooling plates multiple times to ensure position accuracy like traditional multiple cooling plates are fixed, and the installation process is simple and convenient. On the other hand, due to the integral cooling and integral sleeve design, the cooling jacket is always fixed along the radial direction of the heating body, and the fixed connection relationship between the temperature difference power generation sheet and the cooling surface is used to provide a limited fixation of the cooling jacket along the axial direction of the heating body. There is no need to use punched bolts to fix the cooling plate like traditional installation, and a relatively stable and reliable connection can be achieved, further improving the convenience of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0036] Figure 1 It is a system block diagram provided in Example 1 of the present application and mainly used to represent the working principle of the heat recovery device;

[0037] Figure 2 It is a partial enlarged view of part A of the thermoelectric power generation sheet installation structure provided in Example 1 of the present application;

[0038] Figure 3 It is an exploded structural diagram provided in Example 1 of the present application and mainly used to represent the structure of the cooling jacket;

[0039] Figure 4 It is a schematic diagram provided in Example 1 of the present application, mainly used to represent the electrical connection of the thermoelectric power generation sheet.

[0040] Reference numerals: 1, heat-generating body; 1a, heat-dissipating surface;

[0041] 2. Thermoelectric power generation sheet; 200. Thermoelectric power generation sheet group;

[0042] 3. Cooling jacket; 3a. Cooling surface; 3b. Inlet; 3c. Outlet; 3d. Cooling chamber; 31. Inner cylinder; 32. Outer cylinder; 33. First sealing plate; 34. Second sealing plate;

[0043] 4. Voltage stabilizing module; 5. Power consumption module;

[0044] 61. first thermal conductive adhesive layer; 62. second thermal conductive adhesive layer; 7. thermal insulation layer;

[0045] 8. Cooling circulation module; 81. Pump; 82. Liquid storage tank;

[0046] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0049] The following is combined with Figure 1-4 The present application is further described.

[0050] Reference Figure 1 and Figure 2The present application provides a heat recovery system, which includes a heat generating body 1, a thermoelectric power generation sheet 2, a cooling jacket 3, a voltage stabilizing module 4 and an electric power module 5. The heat generating body 1 refers to a device capable of generating heat, such as a compressor, a condenser, etc. In this embodiment, the heat generating body 1 refers to a compressor, which is roughly cylindrical in shape. The heat generating body 1 has a heat dissipation surface 1a capable of dissipating heat. In this embodiment, the heat dissipation surface 1a refers to the outer peripheral side of the compressor. The thermoelectric power generation sheet 2 is provided in multiple pieces and is fixedly attached to the outer peripheral side of the compressor along the circumference of the compressor. Specifically, the hot end of the thermoelectric power generation sheet 2 is fixedly attached to the heat dissipation surface 1a. In this embodiment, the hot end of the thermoelectric power generation sheet 2 is fixedly attached to the heat dissipation surface 1a. In this embodiment, the hot end of the thermoelectric power generation sheet 2 is fixedly attached to the heat dissipation surface 1a by gluing and fixing the connection with the heat dissipation surface 1a through a first heat conductive adhesive layer 61. The cooling jacket 3 is configured to be sleeved on the outside of the compressor. The cooling jacket 3 has a cooling surface 3a facing the thermoelectric power generation sheet 2. The cold end of the thermoelectric power generation sheet 2 is fixedly attached to the cooling surface 3a. In this embodiment, the cold end of the thermoelectric power generation sheet 2 is fixedly attached to the cooling surface 3a by a second heat conductive adhesive layer 62. A cooling chamber 3d is provided in the cooling jacket 3 for the cooling medium to flow through, and an inlet 3b and an outlet 3c are provided on the cooling jacket 3 to communicate with the cooling chamber 3d. When the cooling medium passes through the cooling chamber 3d, the cold end of the thermoelectric power generation sheet 2 is cooled so that the cold end of the thermoelectric power generation sheet 2 is stably maintained at a relatively low temperature, so as to ensure the stability of the temperature difference formed between the hot end and the cold end of the thermoelectric power generation sheet 2, and improve the stability of the output voltage and the power generation efficiency of the thermoelectric power generation sheet 2. The thermoelectric power generation sheet 2 is electrically connected to the power module 5 through the voltage stabilizing module 4 in turn to supply power to the power module 5. The power module 5 refers to a device that can consume electricity.

[0051] According to the above setting, on the one hand, the cooling sleeve 3 is an integrated structure and is mounted on the outside of the heating body 1. There is no need to use multiple cooling plates for fixing as in the traditional solution. Therefore, there is no need to position different cooling plates multiple times to ensure the accuracy of the positions of different cooling plates, and the installation process is simple and convenient. On the other hand, due to the integration of the cooling sleeve 3 and the design of the sleeve, the cooling sleeve 3 is always fixed along the radial direction of the heating body 1, and the fixed connection relationship between the temperature difference power generation sheet 2 and the cooling surface 3a provides a limited fixation of the cooling sleeve 3 along the axial direction of the heating body 1. There is no need to use punched bolts to fix the cooling plate as in the traditional installation. A relatively stable and reliable connection can be achieved, further improving the convenience of installation, especially when the vibration conditions of some driving devices are relatively strong. This setting can ensure the reliable fixing of the temperature difference power generation sheet 2 and ensure the stability of heat recovery. On the one hand, the first thermal conductive glue and the second thermal conductive glue provide a fixing effect between the components, and on the other hand, the first thermal conductive glue and the second thermal conductive glue can effectively improve the heat transfer efficiency and the power generation efficiency.

[0052] It should be noted that the thermoelectric power generation sheet 2 is a common component in the prior art that uses the semiconductor power generation principle to achieve power generation. In this embodiment, the semiconductor thermoelectric power generation sheet 2 of model TEP1-142T300 is selected. In some other optional embodiments, the thermoelectric power generation sheet 2 of SP1848-27145 can also be selected. The basic principle of the thermoelectric power generation sheet 2 is: the thermoelectric power generation sheet 2 has a cold end and a hot end. When in use, the hot end of the thermoelectric power generation sheet 2 is attached to the heat dissipation surface 1a, and the cold end of the thermoelectric power generation sheet 2 dissipates heat to the external environment, so that the hot end and the cold end of the thermoelectric power generation sheet 2 form a potential difference, thereby generating an output voltage. Since the output voltage of a single thermoelectric power generation sheet 2 is small and not stable enough, multiple thermoelectric power generation sheets 2 are arranged and combined in series and parallel, and the multiple thermoelectric power generation sheets 2 are divided into multiple groups of thermoelectric power generation sheet groups 200. The thermoelectric power generation sheets 2 in each group of thermoelectric power generation sheet groups 200 are connected in parallel with each other, and the multiple groups of thermoelectric power generation sheet groups 200 are connected in series to finally form an output circuit. Finally, each thermoelectric power generation sheet group 200, the voltage stabilizing module 4 and the power module 5 are connected in series in sequence to obtain a larger output voltage and current. The specific arrangement in this embodiment is as follows: Figure 4 shown.

[0053] It should be noted that the voltage stabilizing module 4 is a "voltage stabilizing circuit" in the prior art, which is a power supply circuit that can keep the output voltage basically unchanged when the input voltage fluctuates or the load changes. Specifically, in this embodiment, the voltage stabilizing module 4 uses the voltage stabilizing chip LM5148 as the main control chip. LM5148 is a switching DC / DC controller that has all the functions required to realize an efficient synchronous buck power supply operating in a wide input voltage range of 3.5V to 80V.

[0054] It should be noted that in some other optional embodiments, the cooling sleeve 3 can also be selected to be in contact with the cold end of the temperature difference power generation sheet 2, and the first heat conductive adhesive layer 61 is not used for fixed connection, but a direct fixed connection between the cooling sleeve 3 and the heating body 1 is used, such as bolt connection, friction fixation, or adhesive fixation. Although it is still necessary to use bolt fixation, the design of the cooling sleeve 3 being integrally mounted on the outside of the heating body 1 can still provide a relatively stable radial limit fixation during use, thereby avoiding the possibility of falling off when the single-piece cooling plate is fitted and fixed in the existing technical solution, and the integral sleeve is also relatively simple and convenient during installation.

[0055] Reference Figure 1 , Figure 2 and Figure 3The shape of the heating body 1 is roughly cylindrical, and the heating body 1 has an intersecting first direction X and a second direction Y. The axis of the heating body 1 and the axis of the cooling sleeve 3 are parallel to the first direction X. The cooling sleeve 3 includes an inner cylinder 31, an outer cylinder 32, a first sealing plate 33 and a second sealing plate 34. Among them, the inner cylinder 31 is penetrated at both ends of the first direction X, and the inner cylinder 31 is sleeved on the outside of the heating body 1, and the inner wall surface of the inner cylinder 31 forms a cooling surface 3a. The outer cylinder 32 is sleeved on the outside of the inner cylinder 31, and the inner cylinder 31 and the outer cylinder 32 are spaced apart along the second direction Y, that is, there is a gap between the inner wall surface of the outer cylinder 32 and the outer wall surface of the inner cylinder 31. The first sealing plate 33 and the second sealing plate 34 are respectively sealed and fixed at both ends of the inner cylinder 31 and the outer cylinder 32 in the first direction X. Finally, the inner cylinder 31, the outer cylinder 32, the first sealing plate 33 and the second sealing plate 34 are surrounded to form a cooling chamber 3d. The above setting makes the cooling cavity 3d a connected annular cavity, which can increase the contact area between the cooling medium inside the cooling jacket 3 and the outside air, so as to improve the cooling efficiency. A gap is formed between the cooling surface 3a and the heat dissipation surface 1a, and the gap is filled with a heat insulation layer 7. The heat insulation layer 7 reduces the influence between adjacent thermoelectric power generation sheets 2, so that the output voltage between each thermoelectric power generation sheet 2 is relatively stable.

[0056] It should be noted that, in this embodiment, the inlet 3b and the outlet 3c of the cooling medium are both provided on the first sealing plate 33. The inlet 3b and the outlet 3c have a height difference in the second direction Y. Specifically, in this embodiment Figure 1 The middle inlet 3b is below the outlet 3c. In some other optional embodiments, the heights of the inlet 3b and the outlet 3c may also have other layouts, such as the inlet 3b is above the outlet 3c or the inlet 3b is flush with the outlet 3c. In some other optional embodiments, the inlet 3b and the outlet 3c may also be provided on the outer cylinder 32.

[0057] It should be noted that the cross section of the cooling jacket 3 in this embodiment is a polygon, that is, the cooling surface 3a is composed of a number of rectangular planes connected in a circle around the axis of the cooling jacket 3, and the annular arrangement of the thermoelectric power generation sheet 2 corresponds to the rectangular plane arrangement, that is, the cold end of each thermoelectric power generation sheet 2 is in plane contact with the rectangular planes. This setting can make the cooling surface 3a and the thermoelectric power generation sheet 2 better fit in an all-round manner, facilitate installation, increase the cooling surface 3a area, and improve power generation efficiency. Specifically in this embodiment, the cross section of the cooling jacket 3 is a regular decagon.

[0058] Reference Figure 1The heat recovery system also includes a cooling circulation module 8, which includes a pump 81 and a liquid storage tank 82. The liquid outlet of the pump 81 is connected to the inlet 3b of the cooling jacket 3, and the liquid inlet of the pump 81 is connected to the liquid storage tank 82. The liquid storage tank 82 is also connected to the outlet 3c of the cooling jacket 3. The cooling medium is sucked out from the liquid storage tank 82 by the pump 81 and pumped into the cooling chamber 3d through the inlet 3b of the cooling jacket 3, and then finally flows back to the liquid storage tank 82 through the outlet 3c of the cooling jacket 3. The cooling medium in the liquid storage tank 82 can have sufficient cooling time, ensuring that the temperature of the cooling medium is in a lower range, improving the cooling efficiency, and maintaining the temperature difference between the cold end and the hot end of the thermoelectric generator 2 in a larger range, thereby improving the power generation efficiency. The pump 81 increases the circulation speed of the cooling medium, thereby improving the efficiency of taking out heat and improving the cooling efficiency of the cold end of the thermoelectric generator 2. The power module 5 includes a pump 81 and / or other loads, and other loads refer to other electrical equipment other than the pump, such as a lamp.

[0059] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A heat recovery system, characterized in that: include: A heat-generating body (1) having a heat-dissipating surface (1a); A thermoelectric power generation sheet (2), wherein the hot end of the thermoelectric power generation sheet (2) is attached to the heat dissipation surface (1a); A cooling jacket (3) is sleeved on the outside of the heat generating body (1) and the temperature difference power generation sheet (2), the cold end of the temperature difference power generation sheet (2) is thermally connected to the cooling jacket (3), and the cooling jacket (3) is used to cool the cold end of the temperature difference power generation sheet (2); The power module (5) is electrically connected to the thermoelectric power generation sheet (2), and the thermoelectric power generation sheet (2) is used to convert the heat generated by the heat generating body (1) into electrical energy to supply power to the power module (5).

2. The heat recovery system according to claim 1, characterized in that: At least part of the cooling jacket (3) extends along the circumference of the heat-generating body (1) to form an annular structure connected end to end.

3. The heat recovery system according to claim 1 or 2, characterized in that: The heat recovery system has a first direction (X) and a second direction (Y) that intersect each other, the axis of the cooling jacket (3) is parallel to the first direction (X), and the cooling jacket (3) comprises: An inner cylinder (31) is sleeved on the outside of the heat generating body (1), and an inner wall surface of the inner cylinder (31) forms a cooling surface (3a); An outer cylinder (32) is sleeved on the outside of the inner cylinder (31), and the inner cylinder (31) and the outer cylinder (32) are spaced apart along the second direction (Y); A first sealing plate (33) and a second sealing plate (34), wherein the first sealing plate (33) and the second sealing plate (34) are respectively sealed and fixed at two ends of the inner cylinder (31) and the outer cylinder (32) in a first direction (X); The inner cylinder (31), the outer cylinder (32), the first sealing plate (33) and the second sealing plate (34) together form a cooling chamber (3d).

4. The heat recovery system according to claim 1 or 2, characterized in that: The cooling jacket (3) has a cooling surface (3a) facing the thermoelectric power generation sheet (2), and the cooling surface (3a) is in contact with the cold end plane of the thermoelectric power generation sheet (2).

5. The heat recovery system according to claim 4, characterized in that The hot end of the temperature difference power generation sheet (2) and the heat dissipation surface (1a) are fixedly connected via a first heat conductive adhesive layer (61).

6. The heat recovery system according to claim 4, characterized in that The cold end of the temperature difference power generation sheet (2) and the cooling surface (3a) are bonded together via a second heat conductive adhesive layer (62).

7. The heat recovery system according to claim 6, characterized in that A gap is formed between the cooling surface (3a) and the heat dissipation surface (1a), and a heat insulation layer (7) is filled in the gap.

8. The heat recovery system according to claim 1 or 2, characterized in that: The cooling jacket (3) is provided with a cooling cavity (3d) for a cooling medium to flow through, and the cooling jacket (3) is provided with an inlet (3b) and an outlet (3c) connected to the cooling cavity (3d). The heat recovery system also includes a cooling circulation module (8), and the cooling circulation module (8) includes a pump (81). The inlet and outlet (3c) of the pump (81) are respectively connected to the outlet (3c) and the inlet (3b).

9. The heat recovery system according to claim 8, characterized in that The cooling circulation module (8) further comprises a liquid storage tank (82), wherein the liquid storage tank (82) is arranged between the pump (81) and the inlet (3b), and the liquid storage tank (82) is respectively connected to the pump (81) and the inlet (3b).

10. The heat recovery system according to claim 1, characterized in that The heat recovery system further comprises a voltage stabilizing module (4), one end of the voltage stabilizing module (4) being electrically connected to the thermoelectric power generation sheet (2) and the other end of the voltage stabilizing module (4) being electrically connected to the power consumption module (5).

11. The heat recovery system according to claim 10, characterized in that The heat recovery system comprises a plurality of groups of thermoelectric power generation sheet groups (200), each of the thermoelectric power generation sheet groups (200) comprises a plurality of the thermoelectric power generation sheets (2), each of the thermoelectric power generation sheet groups (200), the voltage stabilizing module (4) and the power consumption module (5) are sequentially connected in series, and each of the thermoelectric power generation sheets (2) in each of the thermoelectric power generation sheet groups (200) are connected in parallel with each other.

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