A device with thermoelectric power generation and heat dissipation functions and a thermoelectric power generation method

Abstract

The present invention relates to a device with thermoelectric power generation and heat dissipation functions and a thermoelectric power generation method. The device with thermoelectric power generation and heat dissipation functions includes a high-temperature end heat conduction module, a low-temperature end heat conduction module, a short-distance thermoelectric power generation module, and a long-distance thermoelectric power generation module. The high-temperature end heat conduction module includes a high-temperature end heat conduction layer and a heat dissipation fin group; the low-temperature end heat conduction module includes a low-temperature end heat conduction layer; the short-distance thermoelectric power generation module is arranged inside the heat dissipation fin group; the long-distance thermoelectric power generation module includes a hot end module arranged on the high-temperature end heat conduction layer and a cold end module arranged on the low-temperature end heat conduction layer. The present invention integrates a thermoelectric power generation device and a rapid heat dissipation device. While utilizing thermoelectric power generation, it can enhance heat exchange by using heat sinks; it has good heat dissipation effect and can better protect instrument equipment; at the same time, a short-distance thermoelectric power generation module and a long-distance thermoelectric power generation module are provided, which can make full use of heat energy to drive thermoelectric power generation and improve the power generation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation and power generation utilization, in particular to a device with thermoelectric power generation and heat dissipation functions and a thermoelectric power generation method. Background Art

[0002] According to the principle of thermoelectric power generation, when two metal conductors (or semiconductors) with different free electron densities (or carrier densities) are in contact in a temperature difference environment, electrons on the contact surface diffuse from high concentration to low concentration, and the diffusion rate of electrons is proportional to the temperature difference in the contact area. Therefore, as long as the temperature difference between the two contact conductors is maintained, electrons can continuously diffuse, and a stable voltage will be formed between the other two ends of the two conductors, realizing thermoelectric power generation.

[0003] In the existing thermoelectric power generation devices, the semiconductor power generation chips are all in sheet structures. Although they have strong mobility and can be used in most occasions, for the situation that requires rapid heat dissipation, the sheet power generation chips are relatively thin and cannot dissipate heat quickly, resulting in a small temperature difference between the cold and hot ends and unable to efficiently utilize thermoelectric power generation; in addition, the cold and hot ends of the thermoelectric power generation device are in close contact, resulting in a small temperature difference and low power generation efficiency due to the short distance.

[0004] For heat sinks, there are mainly the following types in the existing technology: ① Flat fin heat sinks can ensure heat transfer performance by increasing the heat transfer area, but they have no obvious help for optimizing the air flow organization; ② Corrugated chevron heat sinks can improve the pressure resistance and heat transfer performance, but the enhanced turbulence makes it difficult for the fluid to be quickly discharged; ③ Heat sinks such as sine type and triangle type can enhance the vortex disturbance and heat transfer effect, but it is difficult to quickly discharge the fluid, and at the same time, their frictional resistance also increases to a certain extent. Summary of the Invention

[0005] The main object of the present invention is to overcome the shortcomings of the existing technology, and provide a device with thermoelectric power generation and heat dissipation functions and a thermoelectric power generation method that can enhance heat transfer using a heat sink while utilizing thermoelectric power generation, with good heat dissipation effect and high power generation efficiency.

[0006] The present invention adopts the following technical solutions:

[0007] A device with thermoelectric power generation and heat dissipation functions includes:

[0008] A high-temperature end heat conduction module, including a high-temperature end heat conduction layer for abutting against a high-temperature object and a heat dissipation fin group arranged on the high-temperature end heat conduction layer, and the heat dissipation fin group includes a plurality of heat dissipation fins;

[0009] A low-temperature end heat conduction module, including a low-temperature end heat conduction layer abutting against a low-temperature object;

[0010] The close-proximity thermoelectric power generation module is disposed inside the heat dissipation fin group and includes a number of sub-power generation modules. Each sub-power generation module includes a number of thermocouple components and a first positive P-type thermocouple element and a first negative N-type thermocouple element for leading out the positive and negative poles. The thermocouple component includes a first P-type thermocouple element, a first N-type thermocouple element disposed inside the same heat dissipation fin, and a first conductive sheet for electrically connecting the hot ends of the first P-type thermocouple element and the first N-type thermocouple element. A number of thermocouple components are connected in series in sequence and are connected in series between the first positive P-type thermocouple element and the first negative N-type thermocouple element. The cold ends of different types of thermocouple elements between the front and rear stages are electrically connected through a conductor.

[0011] And the remote thermoelectric power generation module includes a hot-end module disposed on the high-temperature end heat conduction layer and a cold-end module disposed on the low-temperature end heat conduction layer. The hot-end module and the cold-end module are respectively provided with a number of sub-hot-end modules and sub-cold-end modules corresponding to each other. The correspondingly provided sub-hot-end modules and sub-cold-end modules respectively include a number of thermocouple pairs and a second positive P-type thermocouple element and a second negative N-type thermocouple element for leading out the positive and negative poles. The thermocouple pair includes a second P-type thermocouple element, a second N-type thermocouple element, and a second conductive sheet for electrically connecting the lower ends of the second P-type thermocouple element and the second N-type thermocouple element. The thermocouple pairs of the sub-hot-end modules and the sub-cold-end modules are connected in series at intervals in sequence and are connected in series between the second positive P-type thermocouple element and the second negative N-type thermocouple element. The upper ends of the same type of thermocouple elements of the front and rear stage sub-hot-end modules and sub-cold-end modules are electrically connected through a conductor. Further, the positive and negative poles led out from the number of sub-power generation modules of the close-proximity thermoelectric power generation module are respectively connected in parallel to form a positive pole and a negative pole; the negative and positive poles led out from the number of sub-hot-end modules and sub-cold-end modules of the remote thermoelectric power generation module are respectively connected in parallel to form a negative pole and a positive pole.

[0012] Further, the positive and negative poles of the remote thermoelectric power generation module and the close-proximity thermoelectric power generation module are respectively connected in parallel to form a positive pole and a negative pole.

[0013] Further, the heat dissipation fins are columnar bodies with a streamline cross-section, and a number of heat dissipation fins are arranged in a diamond-shaped staggered pattern.

[0014] Further, both the hot-end module and the cold-end module include a metal insulating substrate. A number of grooves corresponding to the shape of the thermocouple pairs are formed on the metal insulating substrate. Each thermocouple pair and the second positive P-type thermocouple element and the second negative N-type thermocouple element are respectively embedded in the corresponding grooves and the upper ends respectively lead out wires.

[0015] Further, the bottoms of the number of heat dissipation fins of the heat dissipation fin group are connected into a whole through a heat-conducting metal plate. The metal insulating substrate of the hot-end module is tightly connected between the high-temperature end heat conduction layer and the heat-conducting metal plate, and an insulating layer is provided between the metal insulating substrate and the heat-conducting metal plate.

[0016] Furthermore, the low-temperature end heat conduction module further includes a top-layer insulating and heat-conducting layer, and the metal insulating substrate of the cold-end module is closely connected between the low-temperature end heat-conducting layer and the top-layer insulating and heat-conducting layer.

[0017] Furthermore, a plurality of wire channels for embedding wires are formed on the metal insulating substrate.

[0018] Furthermore, the high-temperature end heat-conducting layer, the low-temperature end heat-conducting layer, and the top-layer insulating and heat-conducting layer are all heat-conducting silica gel pads.

[0019] A thermoelectric power generation method for a device with thermoelectric power generation and heat dissipation functions based on the above, the high-temperature end heat-conducting layer and the low-temperature end heat-conducting layer are respectively in contact with a high-temperature object and a low-temperature object; the heat of the high-temperature object is conducted to the heat dissipation fin group and dissipated through the heat dissipation fin group, and the close-range thermoelectric power generation module arranged inside the heat dissipation fin group uses the temperature difference between the hot end and the cold end of the first P-type thermocouple element and the first N-type thermocouple element to generate electricity; at the same time, the long-range power generation module uses the temperature difference between the hot-end module and the cold-end module to generate electricity, and outputs to a charging device or an electrical device through the positive and negative electrodes.

[0020] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0021] First, integrating the thermoelectric power generation and the rapid heat dissipation device into one, while utilizing the thermoelectric power generation, the heat exchange can be enhanced by using the heat sink.

[0022] Second, the thermoelectric power generation consists of two parts. One part is the long-range thermoelectric power generation module formed by connecting the hot-end module and the cold-end module, and the other part is the close-range thermoelectric power generation module arranged inside the heat dissipation fins, making full use of the heat dissipation area of the heat dissipation fins and making full use of the heat energy to drive the thermoelectric power generation; the hot-end module and the cold-end module of the long-range thermoelectric power generation module can be placed separately, which can increase the temperature difference and improve the power generation efficiency; and when the temperature difference cannot drive the close-range thermoelectric power generation module inside the heat dissipation fins to generate electricity, the long-range thermoelectric power generation module can ensure power generation.

[0023] Third, the heat dissipation fins are metal cylinders with a streamlined cross-section and are arranged in a diamond-shaped staggered pattern, with little resistance to the air flow, which can effectively improve the air flow organization, greatly increase the air flow speed, thereby reducing the hot-end temperature and significantly improving the heat dissipation effect, and better protecting the instrument and equipment.

[0024] Fourth, wire channels are provided on the metal insulating substrate, facilitating wire arrangement; at the same time, the positive and negative electrodes of each power generation module are connected in parallel and finally form one positive electrode and one negative electrode output, which is more convenient for management and use. Description of the Drawings

[0025] Figure 1It is a schematic diagram of the overall structure of the device with thermoelectric power generation and heat dissipation functions in Embodiment 1 of the present invention;

[0026] Figure 2 It is a schematic exploded view of the high-temperature end heat conduction module and the hot end module in Embodiment 1 of the present invention;

[0027] Figure 3 It is Figure 2 The enlarged view of part A in

[0028] Figure 4 It is a schematic exploded view of the low-temperature end heat conduction module and the cold end module in Embodiment 1 of the present invention;

[0029] Figure 5 It is a schematic diagram of the circuit structure of the short-distance thermoelectric power generation module in Embodiment 1 of the present invention;

[0030] Figure 6 It is a schematic diagram of the circuit structure of the long-distance thermoelectric power generation module in Embodiment 1 of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure in which thermocouple elements are embedded in the insulating substrate of the cold end module in Embodiment 2 of the present invention, and the wire channel structure is shown in the figure;

[0032] Figure 8 It is a schematic diagram of the structure in which thermocouple elements are embedded in the insulating substrate of the hot end module in Embodiment 2 of the present invention, and the wire channel structure is shown in the figure.

[0033] In the figure: 1. High-temperature end heat conduction layer, 2. Heat dissipation fins, 3. Heat-conducting metal plate, 4. Low-temperature end heat conduction layer, 5. Top insulating heat conduction layer, 6. Sub-power generation module, 61. Thermocouple assembly, 611. First P-type thermocouple element, 612. First N-type thermocouple element, 613. First conductive sheet, 62. First positive P-type thermocouple element, 63. First negative N-type thermocouple element, 7. Wire, 8. Hot end module, 81. Sub-hot end module, 9. Cold end module, 91. Sub-cold end module, 10. Thermocouple pair, 101. Second P-type thermocouple element, 102. Second N-type thermocouple element, 103. Second conductive sheet, 11. Second positive P-type thermocouple element, 12. Second negative N-type thermocouple element, 13. Metal insulating substrate, 131. Groove, 14. Insulating layer, 15. Wire channel. Specific embodiments

[0034] The present invention will be further described below through specific embodiments.

[0035] Embodiment 1

[0036] Refer to Figures 1 to 6, A device with thermoelectric power generation and heat dissipation functions according to the present invention includes a high-temperature end heat conduction module, a low-temperature end heat conduction module, a short-distance thermoelectric power generation module, and a long-distance thermoelectric power generation module.

[0037] The high-temperature end heat conduction module includes a high-temperature end heat conduction layer 1 for abutting against a high-temperature object and a heat dissipation fin group disposed on the high-temperature end heat conduction layer 1. The high-temperature end heat conduction layer 1 is a heat-conducting silica gel layer. The heat dissipation fin group includes a plurality of heat dissipation fins 2. The heat dissipation fins 2 are columns with a streamlined cross-section. A plurality of heat dissipation fins are arranged in a diamond-shaped staggered pattern. The heat dissipation fins 2 are made of metal copper with a relatively high thermal conductivity. The bottoms of the plurality of heat dissipation fins 2 in the heat dissipation fin group are connected into one body by a heat-conducting metal plate 3. The heat-conducting metal plate 3 is a metal copper plate, which is formed by an electroplating process and plated with the heat dissipation fins 2 into one body.

[0038] The low-temperature end heat conduction module includes a low-temperature end heat conduction layer 4 abutting against a low-temperature object and a top-layer insulating heat conduction layer 5. Both the low-temperature end heat conduction layer 4 and the top-layer insulating heat conduction layer 5 are heat-conducting silica gel layers.

[0039] The short-distance thermoelectric power generation module is disposed inside the heat dissipation fin group and includes five sub-power generation modules 6 corresponding to the number of rows of the heat dissipation fins 2. Each sub-power generation module 6 includes a plurality of thermocouple components 61 and a first positive P-type thermocouple element 62 and a first negative N-type thermocouple element 63 for leading out the positive and negative electrodes. The thermocouple component 61 includes a first P-type thermocouple element 611, a first N-type thermocouple element 612 disposed inside the same heat dissipation fin 2, and a first conductive sheet 613 that electrically connects the hot ends of the first P-type thermocouple element 611 and the first N-type thermocouple element 612. The first conductive sheet 613 is made of a metal copper sheet. A plurality of thermocouple components 61 are connected in series in sequence and are connected in series between the first positive P-type thermocouple element 62 and the first negative N-type thermocouple element 63. The cold ends of different types of thermocouple elements between the front and rear stages are electrically connected by a wire 7. The cold end of the first P-type thermocouple element 611 and the cold end of the first N-type thermocouple element 612 of the thermocouple component 61 are respectively electrically connected to the cold end of the first N-type thermocouple element 612 of the subsequent-stage thermocouple component 61 and the cold end of the first P-type thermocouple element 611 of the previous-stage thermocouple component 61. The positive and negative electrodes led out from the five sub-power generation modules 6 of the short-distance thermoelectric power generation module are respectively connected in parallel to form a positive electrode and a negative electrode. The wire 7 is made of a malleable metal wire.

[0040] The long-distance thermoelectric power generation module includes a hot-end module 8 disposed on the high-temperature end heat conduction layer 1 and a cold-end module 9 disposed on the low-temperature end heat conduction layer 4. Both the hot-end module 8 and the cold-end module 9 include a metal insulating substrate 13, and six groups of sub-hot-end modules 81 and sub-cold-end modules 91 are respectively arranged in correspondence. Correspondingly, the sub-hot-end module 81 includes four thermocouple pairs 10 and a second negative N-type thermocouple element 12 for leading out the negative electrode, and the sub-cold-end module 91 includes five thermocouple pairs 10. The thermocouple pair 10 includes a second P-type thermocouple element 101, a second N-type thermocouple element 102, and a second conductive sheet 103 for electrically connecting the lower ends of the second P-type thermocouple element 101 and the second N-type thermocouple element 102. The second conductive sheet 103 is made of a metal copper sheet. The second P-type thermocouple element 101 of the outermost thermocouple pair 10 of the sub-cold-end module 91 serves as the second positive P-type thermocouple element 11 for leading out the positive electrode. The thermocouple pairs 10 of the sub-hot-end module 81 and the sub-cold-end module 91 are sequentially connected in series at intervals and are connected in series between the second positive P-type thermocouple element 11 and the second negative N-type thermocouple element 12. The upper ends of the same-type thermocouple elements of the front and rear sub-hot-end modules 81 and sub-cold-end modules 91 are electrically connected by a wire 7. The upper ends of the second P-type thermocouple element 101 and the second N-type thermocouple element 102 of the thermocouple pair 10 of the sub-hot-end module 81 are electrically connected by a wire 7 to the upper ends of the second P-type thermocouple element 101 and the upper ends of the second N-type thermocouple element 102 of the thermocouple pair 10 of the front-stage sub-cold-end module 91 and the rear-stage sub-cold-end module 91 in series therewith respectively. The negative electrodes and positive electrodes led out by the six groups of sub-hot-end modules 81 and sub-cold-end modules 91 of the long-distance thermoelectric power generation module are respectively connected in parallel to form a negative electrode and a positive electrode. A plurality of grooves 131 corresponding to the shape of the thermocouple pair 10 are formed on the metal insulating substrate 13, and each thermocouple pair 10 and the second negative N-type thermocouple element 12 are embedded in the corresponding groove 131 and the upper ends respectively lead out a wire 7. The metal insulating substrate 13 of the hot-end module 8 is tightly connected between the high-temperature end heat conduction layer 1 and the heat conduction metal plate 3, and an insulating layer 14 is provided between the metal insulating substrate 13 and the heat conduction metal plate 3. The insulating layer 14 is an insulating film that completely covers the bottom of the heat conduction metal plate 3. The heat conduction metal plate 3 has a side edge that embeds the metal insulating substrate 13 therein. The metal insulating substrate 13 of the cold-end module 9 is tightly connected between the low-temperature end heat conduction layer 4 and the top insulating heat conduction layer 5. The wire 7 is made of a malleable metal wire.

[0041] The positive and negative electrodes of the long-distance thermoelectric power generation module and the short-distance thermoelectric power generation module are respectively connected in parallel, and finally form a positive electrode and a negative electrode, and the output is connected to a charging device or an electrical device. The connecting wires 7 in the middle of the hot-end module 8 and the cold-end module 9 are twisted into one wire and are wound and encapsulated with an insulating tape. The thickness of each thermocouple element is the same as the depth of the groove 131 of the metal insulating substrate 13, and each thermocouple element is made of a bismuth telluride material.

[0042] Refer toFigures 1 to 6 , based on the thermoelectric power generation method of the above device with thermoelectric power generation and heat dissipation functions, the high-temperature end heat conduction layer 1 and the low-temperature end heat conduction layer 4 are respectively closely attached to a high-temperature object and a low-temperature object; the heat of the high-temperature object is conducted to the heat dissipation fins 2 and dissipated through the heat dissipation fins 2, and the close-range thermoelectric power generation module arranged inside the heat dissipation fins 2 uses the temperature difference between the hot end and the cold end of the first P-type thermocouple element 611 and the first N-type thermocouple element 612 to generate electricity; at the same time, the long-distance power generation module uses the temperature difference between the hot end module 8 and the cold end module 9 to generate electricity, and outputs to the charging device or the electrical device through the positive and negative electrodes.

[0043] Example 2

[0044] Refer to Figure 7 and Figure 8 , the difference between this embodiment and Embodiment 1 is that: a plurality of wire channels 15 for embedding the wire 7 are opened on the metal insulating substrates 13 of the hot end module 8 and the cold end module 9. A plurality of heat dissipation fins 2 of the heat dissipation fin group are connected into one body through an insulating heat conduction plate, and the heat dissipation fins 2 are bonded to the insulating heat conduction plate. The metal insulating substrate 13 of the hot end module 8 is closely connected between the high-temperature end heat conduction layer 1 and the insulating heat conduction plate.

[0045] The above are only two specific implementation manners of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modification of the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.

Claims

1. A device with thermoelectric power generation and heat dissipation functions, characterized in that: It includes: A high-temperature end heat conduction module, including a high-temperature end heat conduction layer for abutting against a high-temperature object and a heat dissipation fin group arranged on the high-temperature end heat conduction layer, and the heat dissipation fin group includes a plurality of heat dissipation fins; A low-temperature end heat conduction module, including a low-temperature end heat conduction layer abutting against a low-temperature object; A short-distance thermoelectric power generation module, arranged inside the heat dissipation fin group, including a plurality of sub-power generation modules, and each sub-power generation module includes a plurality of thermocouple components and a first positive electrode P-type thermocouple element and a first negative electrode N-type thermocouple element for leading out the positive and negative electrodes. The thermocouple component includes a first P-type thermocouple element, a first N-type thermocouple element arranged inside the same heat dissipation fin and a first conductive sheet for electrically connecting the hot ends of the first P-type thermocouple element and the first N-type thermocouple element. A plurality of thermocouple components are connected in series in sequence and are connected in series between the first positive electrode P-type thermocouple element and the first negative electrode N-type thermocouple element. The cold ends of different-type thermocouple elements between the front and rear stages are electrically connected through a conductor; And a long-distance thermoelectric power generation module, including a hot end module arranged on the high-temperature end heat conduction layer and a cold end module arranged on the low-temperature end heat conduction layer. The hot end module and the cold end module are respectively provided with a plurality of sub-hot end modules and sub-cold end modules correspondingly. The correspondingly arranged sub-hot end modules and sub-cold end modules respectively include a plurality of thermocouple pairs and a second positive electrode P-type thermocouple element and a second negative electrode N-type thermocouple element for leading out the positive and negative electrodes. The thermocouple pair includes a second P-type thermocouple element, a second N-type thermocouple element and a second conductive sheet for electrically connecting the lower ends of the second P-type thermocouple element and the second N-type thermocouple element. The thermocouple pairs of the sub-hot end module and the sub-cold end module are connected in series at intervals in sequence and are connected in series between the second positive electrode P-type thermocouple element and the second negative electrode N-type thermocouple element. The upper ends of the same-type thermocouple elements of the front and rear stage sub-hot end modules and sub-cold end modules are electrically connected through a conductor; The positive and negative electrodes led out from the plurality of sub-power generation modules of the short-distance thermoelectric power generation module are respectively connected in parallel to form a positive electrode and a negative electrode; the negative and positive electrodes led out from the plurality of sub-hot end modules and sub-cold end modules of the long-distance thermoelectric power generation module are respectively connected in parallel to form a negative electrode and a positive electrode; The heat dissipation fin is a column with a streamline cross-section, and a plurality of heat dissipation fins are arranged in a diamond-shaped staggered manner.

2. The device with thermoelectric power generation and heat dissipation functions according to claim 1, characterized in that: The positive and negative electrodes of the long-distance thermoelectric power generation module and the short-distance thermoelectric power generation module are respectively connected in parallel to form a positive electrode and a negative electrode.

3. The device with thermoelectric power generation and heat dissipation functions according to claim 1, characterized in that: Both the hot end module and the cold end module include a metal insulating substrate, and a plurality of grooves corresponding to the shape of the thermocouple pairs are formed on the metal insulating substrate. Each thermocouple pair and the second positive electrode P-type thermocouple element and the second negative electrode N-type thermocouple element are respectively embedded in the corresponding grooves and the upper ends respectively lead out wires.

4. A device with thermoelectric power generation and heat dissipation functions as described in claim 3, characterized in that: The bottoms of the plurality of heat dissipation fins of the heat dissipation fin group are connected into a whole through a heat-conducting metal plate. The metal insulating substrate of the hot end module is tightly connected between the high-temperature end heat conduction layer and the heat-conducting metal plate, and an insulating layer is arranged between the metal insulating substrate and the heat-conducting metal plate.

5. The device with thermoelectric power generation and heat dissipation functions as described in claim 3, characterized in that: The low-temperature end heat conduction module further includes a top layer insulating heat conduction layer, and the metal insulating substrate of the cold end module is tightly connected between the low-temperature end heat conduction layer and the top layer insulating heat conduction layer.

6. The device with thermoelectric power generation and heat dissipation functions according to claim 3, wherein: A plurality of wire channels for embedding wires are formed on the metal insulating substrate.

7. The device with the functions of thermoelectric power generation and heat dissipation according to claim 5, characterized in that: The high-temperature heat conduction layer, the low-temperature heat conduction layer, and the top insulating heat conduction layer are all heat-conducting silicone pads.

8. A thermoelectric power generation method for a device with thermoelectric power generation and heat dissipation functions according to any one of claims 1 to 7, characterized in that: The high-temperature heat conduction layer and the low-temperature heat conduction layer are respectively in contact with the high-temperature object and the low-temperature object; the heat of the high-temperature object is conducted to the heat dissipation fin group and dissipated through the heat dissipation fin group. The short-distance thermoelectric power generation module arranged inside the heat dissipation fin group generates electricity by using the temperature difference between the hot end and the cold end of the first P-type thermocouple element and the first N-type thermocouple element; at the same time, the long-distance power generation module generates electricity by using the temperature difference between the hot end module and the cold end module, and outputs to the charging device or the electrical device through the positive and negative electrodes.

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