Environmental temperature difference energy power generation device

Abstract

The invention relates to an environment temperature difference energy power generation device which comprises a cylindrical phase change heat accumulator, a plurality of sets of P-type thermoelectric elements and N-type thermoelectric elements which are distributed in the circumferential direction of the phase change heat accumulator and arranged alternately, a plurality of first metal sheets arranged in the circumferential direction of the phase change heat accumulator and a plurality of second metal sheets arranged in the circumferential direction of the phase change heat accumulator. The P-type thermoelectric elements and the N-type thermoelectric elements can generate power based on the temperature difference between the external environment and the phase change heat accumulator, the P-type thermoelectric elements and the N-type thermoelectric elements distributed in the circumferential direction of the phase change heat accumulator can obtain a larger temperature contact area, and all-weather power generation is achieved under the phase change and heat accumulation characteristics of the phase change heat accumulator. Therefore, the generating stability of the generating capacity of the environment temperature difference energy generating device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of ambient temperature difference energy generation, and in particular to an ambient temperature difference energy generation device. Background Art

[0002] Ambient temperature difference energy harvesting technology is a low-grade energy utilization technology that uses thermoelectric power generation elements to convert ambient temperature difference energy into electrical energy. It has attracted widespread attention due to its advantages of being clean and pollution-free, long life, small and convenient. The principle of converting ambient temperature difference energy into electrical energy is to use the temperature difference between the cold side and the hot side of the thermoelectric power generation element as the driving force, and use the Seebeck effect to convert thermal energy into electrical energy. However, due to the low quality of ambient temperature difference energy and its intermittent and unstable characteristics, the output electrical energy based on ambient temperature difference energy harvesting technology is unstable. Summary of the invention

[0003] Based on this, it is necessary to provide an ambient temperature difference energy generating device that can stably output electrical energy.

[0004] Provided is an ambient temperature difference energy generating device, comprising:

[0005] Cylindrical phase change heat storage device;

[0006] A plurality of groups of alternately arranged P-type thermoelectric elements and N-type thermoelectric elements are distributed along the circumference of the phase change heat storage device;

[0007] A plurality of first metal sheets are arranged along the circumference of the phase change heat storage device, and each first metal sheet is connected to a P-type thermoelectric element and an N-type thermoelectric element in each group;

[0008] A plurality of second metal sheets are arranged along the circumference of the phase change heat storage device, and each second metal sheet is connected to the P-type thermoelectric element and the N-type thermoelectric element in two adjacent groups;

[0009] The first metal sheet and the second metal sheet are arranged on different sides of the P-type thermoelectric element and the N-type thermoelectric element.

[0010] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0011] A positive output port, the positive output port is led out from one of the P-type thermoelectric elements;

[0012] A negative output port is led out from an N-type thermoelectric element adjacent to the P-type thermoelectric element connected to the positive output port.

[0013] In one embodiment, multiple layers of P-type thermoelectric elements and N-type thermoelectric elements are distributed along the circumference of the phase change thermal storage device.

[0014] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0015] The heat sink is arranged on the outer sides of the P-type thermoelectric element and the N-type thermoelectric element along the circumferential direction of the phase change heat storage device.

[0016] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0017] The first fin is arranged on a side of the heat sink that contacts the external environment.

[0018] In one embodiment, the first fins are distributed on the outer wall of the heat sink at equal intervals along the circumference of the phase change heat storage device.

[0019] In one embodiment, the phase change heat accumulator includes a plurality of cone-shaped second fins, wherein the tip of the second fin is located at the center of the phase change heat accumulator, and the bottom of the second fin contacts the inner edge of the phase change heat accumulator.

[0020] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0021] Two ceramic plates, one of which is arranged between the phase change heat storage device and the first metal sheet, and the other ceramic plate is arranged on the outside of the second metal sheet.

[0022] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0023] The plastic-like thermal insulation cotton is arranged between two adjacent P-type thermoelectric elements and N-type thermoelectric elements.

[0024] In one embodiment, the above-mentioned ambient temperature difference energy generation device further comprises:

[0025] The screws pass through the plastic insulation cotton and are fixed in place with the threads on the outer edge of the phase change heat accumulator.

[0026] The above-mentioned ambient temperature difference energy generating device comprises a cylindrical phase change heat accumulator, a plurality of groups of P-type thermoelectric elements and N-type thermoelectric elements alternately arranged distributed along the circumference of the phase change heat accumulator, a plurality of first metal sheets arranged along the circumference of the phase change heat accumulator, and a plurality of second metal sheets arranged along the circumference of the phase change heat accumulator, so that the P-type thermoelectric elements and the N-type thermoelectric elements can generate electricity based on the temperature difference between the external environment and the phase change heat accumulator, and the P-type thermoelectric elements and the N-type thermoelectric elements distributed along the circumference of the phase change heat accumulator can obtain a larger temperature contact area, and realize all-weather power generation under the phase change and heat storage characteristics of the phase change heat accumulator, thereby improving the power generation stability of the ambient temperature difference energy generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is one of the top views of the structural block diagram of the ambient temperature difference energy power generation device according to one embodiment;

[0029] Figure 2 A cross-sectional view of a structural block diagram of an ambient temperature difference energy power generation device according to an embodiment;

[0030] Figure 3 This is a second top view of the structural block diagram of an ambient temperature difference energy power generation device according to an embodiment. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first metal sheet may be referred to as a second metal sheet, and similarly, a second metal sheet may be referred to as a first metal sheet. Both the first metal sheet and the second metal sheet are metal sheets, but they are not the same metal sheet.

[0034] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0035] It is understood that “plurality” refers to two or more than two, and “at least a portion of an element” refers to a portion or all of an element.

[0036] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0037] In one embodiment, Figure 1 and Figure 2 As shown, an ambient temperature difference energy power generation device 10 is provided, comprising: a cylindrical phase change heat accumulator 102, a plurality of groups of alternatingly arranged P (Positive) type thermoelectric elements 104 and N (Negative) type thermoelectric elements 106 distributed along the circumference of the phase change heat accumulator 102, a plurality of first metal sheets 108 and a plurality of second metal sheets 110.

[0038] A plurality of first metal sheets 108 are arranged along the circumference of the phase-change thermal storage device 102 , and each first metal sheet 108 is connected to a corresponding P-type thermoelectric element 104 and an N-type thermoelectric element 106 in each group.

[0039] A plurality of second metal sheets 110 are arranged along the circumference of the phase-change thermal storage device 102 , and each second metal sheet 110 is connected to a corresponding P-type thermoelectric element 104 and an N-type thermoelectric element 106 in two adjacent groups.

[0040] The first metal sheet 108 and the second metal sheet 110 are disposed on different sides of the P-type thermoelectric element 104 and the N-type thermoelectric element 106 .

[0041] The phase change heat storage device 102 includes a phase change heat storage material, which can store or release a large amount of heat during the phase change process. When there is a temperature difference between the temperature of the external environment and the temperature in the phase change heat storage device 102, the P-type thermoelectric element 104 and the N-type thermoelectric element 106, which are located between the external environment and the phase change heat storage device 102 and connected together by the first metal sheet 108 and / or the second metal sheet 110, will generate a voltage based on the Seebeck effect 2, thereby converting the ambient temperature difference energy into electrical energy. Among them, the phase change heat storage material can be selected according to the actual application environment. For example, a phase change heat storage material with a phase change temperature of 5°C-30°C can be selected, such as a paraffin phase change material.

[0042] When the temperature of the external environment is higher than the temperature of the phase-change heat storage device 102, the phase-change heat storage device 102 will store the excess heat energy; when the temperature of the external environment is lower than the temperature of the phase-change heat storage device 102, the phase-change heat storage device 102 will release the stored heat energy. In addition, since the phase-change heat storage material in the phase-change heat storage device 102 has the characteristic of thermal delay, a temperature difference can be formed between the phase-change heat storage device 102 and the external environment.

[0043] Furthermore, the heat storage capacity of the phase-change heat accumulator 102 can be adjusted by adjusting the volume of the phase-change heat accumulator 102. The larger the volume of the phase-change heat accumulator 102, the stronger the heat storage capacity of the phase-change heat accumulator 102.

[0044] Furthermore, the temperature of the external environment is variable, and all-weather power generation can be achieved through the phase change heat storage device 102. Specifically, when the temperature of the external environment is higher than the temperature of the phase change heat storage device 102 (such as during the day), the phase change heat storage device 102 will serve as the cold end, the external environment will serve as the hot end, and the P-type thermoelectric element 104 and the N-type thermoelectric element 106 will generate electricity under this temperature difference; when the temperature of the external environment is lower than the temperature of the phase change heat storage device 102 (such as at night), the phase change heat storage device 102 that has absorbed heat energy will serve as the hot end, the external environment will serve as the cold end, and the P-type thermoelectric element 104 and the N-type thermoelectric element 106 will generate electricity under this temperature difference; therefore, this environmental temperature difference energy power generation device 10 is less affected by the actual temperature fluctuations of the external environment, and can achieve all-weather continuous power generation based on the energy storage capacity of the phase change heat storage device 102.

[0045] Based on the above-mentioned P-type thermoelectric element 104, N-type thermoelectric element 106, first metal sheet 108 and second metal sheet 110, the first metal sheet 108 and second metal sheet 110 can connect any two adjacent P-type thermoelectric elements 104 and N-type thermoelectric elements 106 in series, thereby accumulating the electromotive force generated by the P-type thermoelectric element 104 and the N-type thermoelectric element 106 to achieve a higher voltage output. The multiple groups of P-type thermoelectric elements 104 and N-type thermoelectric elements 106 distributed along the circumference of the cylindrical phase change heat storage device 102 have a larger contact area with the external environment. Under the same temperature difference, the ambient temperature difference energy power generation device 10 can effectively increase the power generation.

[0046] Further, a suitable central angle α can be selected according to actual application requirements, and the central angles of the P-type thermoelectric element 104 and the N-type thermoelectric element 106 can be determined based on 360° / α, so that the P-type thermoelectric element 104 and the N-type thermoelectric element 106 are arranged in contact with the outer wall of the phase change thermal storage device 102. The smaller the central angle, the greater the number of the P-type thermoelectric element 104 and the N-type thermoelectric element 106, and the stronger the power generation capacity of the ambient temperature difference energy power generation device 10.

[0047] Therefore, the above-mentioned ambient temperature difference energy generation device 10 includes a cylindrical phase change heat accumulator 102, a plurality of groups of alternatingly arranged P-type thermoelectric elements 104 and N-type thermoelectric elements 106 distributed along the circumference of the phase change heat accumulator 102, a plurality of first metal sheets 108 arranged along the circumference of the phase change heat accumulator 102, and a plurality of second metal sheets 110 arranged along the circumference of the phase change heat accumulator 102, so that the P-type thermoelectric elements 104 and the N-type thermoelectric elements 106 can generate electricity based on the temperature difference between the external environment and the phase change heat accumulator 102, and the P-type thermoelectric elements 104 and the N-type thermoelectric elements 106 distributed along the circumference of the phase change heat accumulator 102 can obtain a larger temperature contact area, and realize all-weather power generation under the phase change and heat storage characteristics of the phase change heat accumulator 102, thereby improving the power generation stability of the ambient temperature difference energy generation device 10.

[0048] In one embodiment, the above-mentioned ambient temperature difference energy power generation device 10 further includes: a positive output port and a negative output port.

[0049] The positive output port is led out from one of the P-type thermoelectric elements 104 .

[0050] The negative output port is led out from the N-type thermoelectric element 106 adjacent to the P-type thermoelectric element 104 connected to the positive output port.

[0051] The use of electric energy can be realized by connecting the load or energy storage device to the positive output port and the negative output port.

[0052] In one embodiment, multiple layers of P-type thermoelectric elements 104 and N-type thermoelectric elements 106 are distributed along the circumference of the phase-change thermal storage device 102 .

[0053] like Figure 1 As shown, the P-type thermoelectric elements 104 and N-type thermoelectric elements 106 distributed along the circumference of the phase change heat accumulator 102 to form a complete ring are a layer of P-type thermoelectric elements 104 and N-type thermoelectric elements 106, and multiple layers of P-type thermoelectric elements 104 and N-type thermoelectric elements 106 can be distributed along the circumference of the phase change heat accumulator 102 to improve the power generation capacity of the ambient temperature difference energy power generation device 10.

[0054] It should be noted that, between the multi-layer ambient temperature difference energy power generation device 10, corresponding first metal sheets 108 and / or second metal sheets 110 need to be arranged to connect adjacent P-type thermoelectric elements 104 and N-type thermoelectric elements 106 to form a complete power generation circuit.

[0055] In one embodiment, Figure 3 As shown, the above-mentioned ambient temperature difference energy power generation device 10 also includes: a radiator 112.

[0056] The heat sink 112 is disposed outside the P-type thermoelectric element 104 and the N-type thermoelectric element 106 along the circumferential direction of the phase-change heat storage device 102 .

[0057] The radiator 112 can enhance the thermal conductivity of the ambient temperature difference energy power generation device 10 , thereby strengthening the phase change and heat storage efficiency of the phase change heat storage device 102 , allowing for more sufficient heat exchange, thereby improving the power generation capacity of the ambient temperature difference energy power generation device 10 .

[0058] In one embodiment, Figure 3 As shown, the above-mentioned ambient temperature difference energy power generation device 10 also includes: a first fin 114.

[0059] The first fin 114 is disposed on a side of the heat sink 112 that contacts the external environment.

[0060] The first fin 114 extends toward the external environment, thereby increasing the contact area with the external environment, further improving the heat exchange capacity of the ambient temperature difference energy power generation device 10 , and thus improving the power generation capacity of the ambient temperature difference energy power generation device 10 .

[0061] In one embodiment, Figure 3 As shown, the first fins 114 are evenly spaced and distributed on the outer wall of the heat sink 112 along the circumference of the phase change heat storage device 102 .

[0062] The first fins 114 distributed at equal intervals can ensure that the ambient temperature difference energy generating device 10 can achieve heat exchange from the surrounding external environment, avoiding inefficient power generation when the external environment heat distribution is uneven, thereby ensuring the power generation efficiency of the ambient temperature difference energy generating device 10.

[0063] In one embodiment, Figure 3 As shown, the phase-change heat accumulator 102 includes a plurality of cone-shaped second fins 116 , wherein the tip of the second fin 116 is located at the center point of the phase-change heat accumulator 102 , and the bottom of the second fin 116 contacts the inner edge of the phase-change heat accumulator 102 .

[0064] The second fins 116 can be evenly distributed in the phase change heat accumulator 102 to enhance the heat conductivity, thereby keeping the temperature change in the phase change heat accumulator 102 consistent and ensuring stable power generation of the ambient temperature difference energy power generation device 10 .

[0065] Since the phase change heat accumulator 102 is a cylinder, the area of ​​the tip top of the cone-shaped second fin 116 is relatively small compared to the area of ​​the bottom. Combined with the property that the area of ​​the cylinder increases along the radial direction, the cone-shaped second fin 116 can improve the thermal conductivity of the phase change heat accumulator therein, thereby minimizing the temperature difference between the center position of the phase change heat accumulator 102 and the outer edge position.

[0066] It should be noted that Figure 3 The number of the first fins 114 and the second fins 116 is only an example and does not limit the ambient temperature difference energy power generation device 10 .

[0067] In one embodiment, Figure 3 As shown, the above-mentioned ambient temperature difference energy power generation device 10 also includes: two ceramic plates 118 .

[0068] One of the ceramic plates 118 is disposed between the phase-change heat storage device 102 and the first metal sheet 108 , and the other ceramic plate 118 is disposed on the outer side of the second metal sheet 110 .

[0069] The ceramic plate 118 can isolate electrical leakage, ensuring that the electrical energy generated by the P-type thermoelectric element 104 and the N-type thermoelectric element 106 will not leak into the external environment and the phase change heat storage device 102 through the metal sheet, thereby ensuring the stability of the ambient temperature difference energy generation device 10 while taking into account the issue of electrical safety when using the ambient temperature difference energy generation device 10.

[0070] In one embodiment, Figure 3 As shown, the above-mentioned ambient temperature difference energy generation device 10 also includes: plastic insulation cotton 120.

[0071] The plastic heat insulation wool 120 is arranged between two adjacent P-type thermoelectric elements 104 and N-type thermoelectric elements 106 .

[0072] The plastic insulation cotton 120 has the function of heat preservation and insulation, which can prevent excessively high temperature from being transmitted between each P-type thermoelectric element 104 and each N-type thermoelectric element 106, resulting in the destruction of each P-type thermoelectric element 104 and each N-type thermoelectric element 106, thereby improving the reliability and stability of the ambient temperature difference energy generation device 10.

[0073] In one embodiment, the above-mentioned ambient temperature difference energy generation device 10 further includes: screws.

[0074] The screw passes through the plastic heat insulation wool 120 and is fixed with the thread on the outer edge of the phase change heat accumulator 102.

[0075] The screws pass through the plastic insulation cotton 120 to fix the components of the ambient temperature difference energy generation device 10, which can avoid passing through the P-type thermoelectric element 104 and the N-type thermoelectric element 106. There is no need to consider the electrical isolation and heat transfer effects when passing through the P-type thermoelectric element 104 and the N-type thermoelectric element 106, which greatly improves the design simplicity of the ambient temperature difference energy generation device 10.

[0076] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An ambient temperature difference energy generating device, characterized in that: include: Cylindrical phase change heat storage device; A plurality of groups of alternately arranged P-type thermoelectric elements and N-type thermoelectric elements are distributed along the circumference of the phase change heat storage device; A plurality of first metal sheets are arranged along the circumference of the phase change heat storage device, and each first metal sheet is connected to a P-type thermoelectric element and an N-type thermoelectric element in each group; A plurality of second metal sheets are arranged along the circumference of the phase change heat accumulator, and each second metal sheet is connected to the P-type thermoelectric element and the N-type thermoelectric element in two adjacent groups; The first metal sheet and the second metal sheet are arranged on different sides of the P-type thermoelectric element and the N-type thermoelectric element.

2. The ambient temperature difference energy power generation device according to claim 1, characterized in that: Also includes: A positive output port, the positive output port is led out from one of the P-type thermoelectric elements; A negative output port is led out from an N-type thermoelectric element adjacent to the P-type thermoelectric element connected to the positive output port.

3. The ambient temperature difference energy power generation device according to claim 1, characterized in that: Multiple layers of the P-type thermoelectric elements and the N-type thermoelectric elements are distributed along the circumference of the phase-change heat storage device.

4. The ambient temperature difference energy generating device according to claim 1, characterized in that: Also includes: A heat sink is arranged outside the P-type thermoelectric element and the N-type thermoelectric element along the circumferential direction of the phase-change heat storage device.

5. The ambient temperature difference energy generating device according to claim 4, characterized in that: Also includes: The first fin is arranged on a side of the heat sink that contacts the external environment.

6. The ambient temperature difference energy generating device according to claim 5, characterized in that: The first fins are distributed on the outer wall of the radiator at equal intervals along the circumference of the phase change heat storage device.

7. The ambient temperature difference energy power generation device according to claim 1, characterized in that: The phase-change heat accumulator includes a plurality of second fins with a cone structure, wherein the tip of each second fin is located at the center point of the phase-change heat accumulator, and the bottom of each second fin contacts the inner edge of the phase-change heat accumulator.

8. The ambient temperature difference energy generating device according to claim 1, characterized in that: Also includes: Two ceramic plates, one of which is arranged between the phase-change heat storage device and the first metal sheet, and the other ceramic plate is arranged on the outside of the second metal sheet.

9. The ambient temperature difference energy generating device according to claim 1, characterized in that: Also includes: Plastic-like heat-insulating cotton, the plastic-like heat-insulating cotton is arranged between two adjacent P-type thermoelectric elements and N-type thermoelectric elements.

10. The ambient temperature difference energy power generation device according to claim 9, characterized in that: Also includes: A screw passes through the plastic insulation cotton and is fixed to the thread on the outer edge of the phase change heat accumulator.

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