A thermoelectrically coupled heat pipe type vacuum tube solar collector

Abstract

The present invention discloses a thermoelectrically coupled heat pipe type vacuum tube solar collector, which relates to the technical field of solar heat collection, comprising: a base, on which an inclined support is fixed; a heat collecting tube assembly, one end of which is fixed to the inclined support and the other end is embedded in a first water tank, and the heat collecting tube assembly is inclined; an auxiliary heat collecting assembly, which is arranged on the inclined support and located at the bottom of the heat collecting tube assembly; wherein a thermoelectric assembly is arranged in the first water tank; the heat collecting tube assembly comprises at least a vacuum tube and a heat collecting tube located in the vacuum tube, wherein a first heat collecting plate is embedded in the upper part of the heat collecting tube, and a second heat collecting plate is embedded in the lower part of the heat collecting tube, and a second fin is further connected to the end of the vacuum tube, which increases the heat absorption area and improves the heat collection efficiency, and the auxiliary heat collecting assembly can further enhance the heat collection effect.

Description

Technical Field

[0001] The invention relates to the technical field of solar heat collection, in particular to a thermoelectric coupling heat pipe type vacuum tube solar heat collector. Background Art

[0002] The primary operating principle of a solar thermal collector is to absorb solar radiation and transfer the resulting heat energy to a heat transfer medium. Collectors typically consist of one or more absorbing surfaces coated with a highly efficient, solar-selective coating to maximize absorption of solar radiation. When sunlight strikes the collector, the absorbing surface converts the solar radiation into heat energy, which it then transfers to the heat transfer medium in contact with through conduction and convection.

[0003] With the continuous development of science and technology, various high-efficiency solar thermal collectors have emerged. However, existing technologies still have some shortcomings in practical applications, especially in terms of thermoelectric conversion efficiency, operating mode flexibility, thermal management, and system reliability.

[0004] For example, some existing solar thermal systems suffer from low thermoelectric conversion efficiency due to improperly designed thermoelectric modules. Specifically, the modules may be too compact, preventing the adequate transfer and utilization of heat. Consequently, the system generates less electricity for the same amount of solar energy absorbed, making it unsuitable for large-scale applications.

[0005] Many existing solar thermal systems are limited to single-mode power generation or water heating, lacking the flexibility to switch between different operating modes. This limits their applicability to diverse climate conditions and user needs. For example, in conditions with ample sunshine but low demand for thermal energy, the system may not be able to effectively convert excess solar energy into electricity for storage.

[0006] Therefore, it is necessary to provide a thermoelectrically coupled heat pipe type vacuum tube solar collector to solve the above problems. Summary of the Invention

[0007] To solve the above problems, the present invention provides the following technical solutions: a thermoelectrically coupled heat pipe type vacuum tube solar collector, comprising: a base, on which an inclined support is fixed; a heat collecting tube assembly, one end of which is fixed to the inclined support and the other end is embedded in a first water tank, and the heat collecting tube assembly is inclined; an auxiliary heat collecting assembly, which is arranged on the inclined support and located at the bottom of the heat collecting tube assembly; wherein a thermoelectric assembly is arranged in the first water tank;

[0008] The heat collecting tube assembly includes at least a vacuum tube and a heat collecting tube located inside the vacuum tube, wherein the upper portion of the heat collecting tube is embedded with a first heat collecting plate, the lower portion of the heat collecting tube is embedded with a second heat collecting plate, and the end of the vacuum tube is further connected to a second fin.

[0009] Preferably, the end of the heat collecting tube is integrally formed into a heat exchange head, the second fin is connected to the heat exchange head, and a heat preservation tube is further connected between the vacuum tube and the heat exchange head.

[0010] Preferably, the thermoelectric component includes: a heat source component, which is attached to the second fin, and a P-type semiconductor and an N-type semiconductor are fixed on the other side of the heat source component; a first cold source component, which is fixed on the N-type semiconductor; and a second cold source component, which is fixed on the P-type semiconductor.

[0011] Preferably, the second fins, the first cooling source component and the second cooling source component are all extended vertically downward, and the bottoms of the second fins, the first cooling source component and the second cooling source component are flush.

[0012] Preferably, a plurality of first fins distributed at intervals are connected to the bottom of the heat exchange head, the bottom of the first fin is higher than the bottom of the second fin, and the first fin and the second fin are both made of elastic material.

[0013] Preferably, a substrate is provided on the top of the N-type semiconductor, the middle part of the substrate is hinged to the first water tank, the end of the substrate is hinged with a hinge, the hinge is also hinged to the telescopic part, and the telescopic part is fixedly embedded in the first water tank.

[0014] Preferably, the auxiliary heat collection assembly includes: a reflector, which is rotatably arranged in the inclined support and has an arc-shaped structure; a reduction motor, which is fixed on the inclined support and is used to drive the reflector; and a center of gravity adjustment member, which is fixed to the bottom of the reflector.

[0015] Preferably, the water inlet of the first water tank is connected in series with a second water tank, and the water inlet and outlet of the first water tank are both provided with valve bodies, and the total amount of water in the first water tank can be adjusted through the cooperation between the second water tank and the valve body.

[0016] Preferably, the water outlet end of the first water tank is further connected in series with a temperature control cylinder and a storage cylinder, wherein the temperature control cylinder has a heating function.

[0017] Compared to existing technologies, the present invention provides a thermoelectrically coupled heat pipe vacuum tube solar collector with the following advantages: It utilizes the thermoelectric effect to efficiently convert absorbed solar energy into electrical energy. By optimizing the layout and design of the thermoelectric components, the temperature difference effect is enhanced, thereby increasing the thermoelectric conversion efficiency.

[0018] The present invention supports two operating modes: thermal power generation and water heating, which can be flexibly switched according to actual needs. In thermal power generation mode, the thermoelectric conversion efficiency is maximized by adjusting the water infiltration state and the deflection angle of the thermoelectric component.

[0019] The heating function of the temperature control cylinder and the storage and buffering effect of the storage cylinder of the present invention realize the cascade utilization and efficient conversion of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of a thermoelectrically coupled heat pipe vacuum tube solar collector;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of a thermoelectrically coupled heat pipe vacuum tube solar collector;

[0022] Figure 3 The figure is a schematic cross-sectional view of a heat collecting tube assembly in a thermoelectrically coupled heat pipe type vacuum tube solar collector;

[0023] Figure 4 The figure is a schematic cross-sectional view of a thermoelectric component in a thermoelectrically coupled heat pipe vacuum tube solar collector;

[0024] In the figure: 1. Base; 2. Oblique support; 3. Heat collecting tube assembly; 4. Auxiliary heat collecting assembly; 5. First water tank; 6. Temperature control cylinder; 7. Storage cylinder; 8. Second water tank; 9. Thermoelectric assembly; 31. Vacuum tube; 32. Heat collecting tube; 33. First heat collecting plate; 34. Second heat collecting plate; 35. Insulation cylinder; 36. Heat exchange head; 37. First fin; 38. Second fin; 41. Reflector; 42. Speed reducer; 43. Center of gravity adjustment part; 91. P-type semiconductor; 92. N-type semiconductor; 93. Heat source part; 94. First cold source part; 95. Second cold source part; 96. Base plate; 97. Telescopic part; 98. Hinge part. DETAILED DESCRIPTION

[0025] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0026] Example: Please refer to Figure 1-Figure 4,In an embodiment of the present invention, a thermoelectrically coupled heat pipe type vacuum tube solar thermal collector is provided, comprising: a base 1 , on which an oblique support 2 is fixed;

[0027] The heat collecting tube assembly 3 has one end fixed on the inclined support 2 and the other end embedded in the first water tank 5, and the heat collecting tube assembly 3 is inclined; the auxiliary heat collecting assembly 4 is arranged on the inclined support 2 and is located at the bottom of the heat collecting tube assembly 3; wherein, a thermoelectric assembly 9 is arranged in the first water tank 5; the heat collecting tube assembly 3 includes at least a vacuum tube 31 and a heat collecting tube 32 located in the vacuum tube 31, wherein the upper part of the heat collecting tube 32 is embedded with a first heat collecting plate 33, and the lower part of the heat collecting tube 32 is embedded with a second heat collecting plate 34, and the end of the vacuum tube 31 is also connected to a second fin 38.

[0028] The first and second heat collecting plates 33 and 34 are respectively embedded in the upper and lower portions of the heat collecting tubes 32, increasing the heat absorption area and improving heat collection efficiency. The thermoelectric assembly 9 provided in the first water tank 5 converts the collected heat energy into electrical energy, achieving dual utilization of heat and electricity and improving energy conversion efficiency.

[0029] In addition, the auxiliary heat collection assembly 4 located at the bottom of the heat collection tube assembly 3 can further enhance the heat collection effect, especially under low-angle sunlight, and can still maintain a high heat collection efficiency.

[0030] The end of the heat collecting tube 32 is integrally formed into a heat exchange head 36 , the second fin 38 is connected to the heat exchange head 36 , and a heat preservation tube 35 is further connected between the vacuum tube 31 and the heat exchange head 36 .

[0031] In addition, the auxiliary heat collection assembly 4 includes: a reflector 41, which is rotatably arranged in the inclined support 2 and has an arc-shaped structure; a reduction motor 42, which is fixed on the inclined support 2 and is used to drive the reflector 41; and a center of gravity adjustment member 43, which is fixed to the bottom of the reflector 41.

[0032] Therefore, during use, the first heat collecting plate 33 in the heat collecting tube assembly 3 directly absorbs sunlight heat energy. At the same time, the sunlight is reflected by the reflector 41 onto the second heat collecting plate 34, thereby simultaneously transferring heat to the medium in the heat collecting tube 32. The medium in the heat collecting tube 32 increases in temperature after being heated, and the heat energy is transferred to the water in the first water tank 5 through heat conduction. The heated water in the first water tank 5 can be used for heating, hot water supply, etc.

[0033] In addition, the reduction motor 42 drives the reflector 41 to fine-tune the angle according to the preset program or the sunlight angle information fed back by the sensor, thereby reflecting more sunlight onto the second heat collecting plate 34. During this process, the center of gravity adjustment member 43 ensures that the reflector 41 remains stable during the adjustment process.

[0034] In addition, the thermoelectric component 9 utilizes the temperature difference of the water in the first water tank 5 to perform thermoelectric conversion to generate electrical energy.

[0035] In this embodiment, the thermoelectric component 9 includes: a heat source component 93, which is attached to the second fin 38, and a P-type semiconductor 91 and an N-type semiconductor 92 are fixed on the other side of the heat source component 93; a first cold source component 94, which is fixed on the N-type semiconductor 92; and a second cold source component 95, which is fixed on the P-type semiconductor 91.

[0036] The heat source 93 is attached to the second fin 38 to absorb the heat transferred by the heat collecting tube assembly 3. The second fin 38 increases the heat exchange area between the heat source 93 and the heat collecting tube assembly 3, thereby improving the heat transfer efficiency.

[0037] In this embodiment, the second fins 38 , the first cooling source 94 , and the second cooling source 95 are all vertically extended downward, and their bottoms are flush.

[0038] In this embodiment, a plurality of first fins 37 distributed at intervals are connected to the bottom of the heat exchange head 36 . The bottom of the first fin 37 is higher than the bottom of the second fin 38 . Both the first fin 37 and the second fin 38 are made of elastic material.

[0039] Furthermore, a substrate 96 is provided on the top of the N-type semiconductor 92, the middle part of the substrate 96 is hinged to the first water tank 5, the end of the substrate 96 is hinged with a hinge 98, and the hinge 98 is also hinged to the telescopic part 97, and the telescopic part 97 is fixedly embedded in the first water tank 5.

[0040] The telescopic member 97 is any one of an electric telescopic rod, a screw nut pair, and a magnetostrictor.

[0041] The water inlet end of the first water tank 5 is connected in series with the second water tank 8. The water inlet and outlet ends of the first water tank 5 are both provided with valve bodies. The total amount of water in the first water tank 5 can be adjusted through the cooperation of the second water tank 8 and the valve body to meet different needs.

[0042] Specifically, during implementation, two modes can be achieved: 1. Thermal power generation mode: In this mode, only a small amount of water exists in the first water tank 5. The water soaks the second fin 38, the first cold source element 94, and the second cold source element 95, but does not soak the first fin 37. During power generation, the telescopic element 97 extends, driving the base plate 96 to deflect, thereby raising the second fin 38 and lowering the first cold source element 94 and the second cold source element 95. As the second fin 38 is separated from the water, its temperature rises, and the contact area between the first cold source element 94 and the second cold source element 95 and the water increases, resulting in an increase in the temperature difference between the ends of the P-type semiconductor 91 and the N-type semiconductor 92, thereby improving the thermoelectric conversion efficiency.

[0043] It is worth noting that when the second fin 38 deflects, it contacts the first fin 37 , and this contact may further enhance the temperature difference effect because the first fin 37 is still at a higher temperature.

[0044] II. Water Heating Mode: In this mode, a large amount of water exists in the first water tank 5, soaking the first fins 37, second fins 38, first cooling element 94, and second cooling element 95. In this mode, the collector primarily functions as a water heater, heating the water with solar energy absorbed by the heat collecting tube assembly 3. Because the water soaks up a larger heat exchange area (including the first fins 37 and second fins 38), heating efficiency is higher.

[0045] That is to say, in this embodiment, by adjusting the amount of water and the deflection angle of the thermoelectric assembly 9, the collector can flexibly switch between the thermal power generation mode and the water heating mode.

[0046] In the thermal power generation mode, by optimizing the deflection of the thermoelectric component 9 and the wetting state of the water body, the temperature difference effect can be maximized and the thermoelectric conversion efficiency can be improved.

[0047] In this embodiment, the water outlet end of the first water tank 5 is further connected in series with a temperature control cylinder 6 and a storage cylinder 7, wherein the temperature control cylinder 6 has a heating function.

[0048] The main function of the temperature control cylinder 6 is to heat the water flowing out of the first water tank 5. This can be achieved by a built-in electric heater or other heat source, ensuring that the water reaches the required temperature before storage and use, especially when the ambient temperature is low or there is insufficient sunlight.

[0049] The primary function of the storage cylinder 7 is to store the water heated and temperature-controlled by the temperature-control cylinder 6. It provides a large, well-insulated storage space, ensuring that the water maintains the desired temperature over a long period of time. The storage cylinder 7 also serves as a thermal buffer, balancing the system's heat output during periods of sufficient and insufficient sunlight. This helps ensure that the system provides stable water heating services in all weather conditions.

[0050] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thermoelectrically coupled heat pipe type vacuum tube solar collector, characterized in that: include: A base (1) on which an oblique support (2) is fixed; A heat collecting tube assembly (3), one end of which is fixed to the inclined support (2) and the other end of which is embedded in the first water tank (5), and the heat collecting tube assembly (3) is inclined; an auxiliary heat collection assembly (4), which is arranged on the inclined support (2) and located at the bottom of the heat collection tube assembly (3); Wherein, a thermoelectric component (9) is provided in the first water tank (5); The heat collecting tube assembly (3) at least comprises a vacuum tube (31) and a heat collecting tube (32) located in the vacuum tube (31), wherein a first heat collecting plate (33) is embedded in the upper portion of the heat collecting tube (32), a second heat collecting plate (34) is embedded in the lower portion of the heat collecting tube (32), and a second fin (38) is further connected to the end of the vacuum tube (31); The thermoelectric assembly (9) comprises: A heat source element (93) is attached to the second fin (38), and a P-type semiconductor (91) and an N-type semiconductor (92) are fixed on the other side of the heat source element (93); A first cold source component (94) fixed on the N-type semiconductor (92); A second cold source component (95) fixed on the P-type semiconductor (91); A substrate (96) is provided on the top of the N-type semiconductor (92); the middle portion of the substrate (96) is hinged to the first water tank (5); an end portion of the substrate (96) is hinged to a hinged member (98); the hinged member (98) is further hinged to a telescopic member (97); and the telescopic member (97) is fixedly embedded in the first water tank (5); When there is only a small amount of water in the first water tank (5), it is in a thermal power generation mode, at which time the telescopic member (97) is extended, the driving base plate (96) is deflected, and the second fin (38) is lifted and the first cold source member (94) and the second cold source member (95) are lowered, so that the second fin (38) is separated from the water, and the contact area between the first cold source member (94) and the second cold source member (95) and the water is increased; when there is a large amount of water in the first water tank (5), it is in a water heating mode, and the water infiltrates the second fin (38), the first cold source member (94) and the second cold source member (95).

2. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 1, characterized in that: The end of the heat collecting tube (32) is integrally formed into a heat exchange head (36), the second fin (38) is connected to the heat exchange head (36), and a heat preservation tube (35) is also connected between the vacuum tube (31) and the heat exchange head (36).

3. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 1, characterized in that: The second fin (38), the first cooling source (94), and the second cooling source (95) are all distributed vertically downward, and the bottoms of the second fin (38), the first cooling source (94), and the second cooling source (95) are flush.

4. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 2, characterized in that: The bottom of the heat exchange head (36) is also connected to a plurality of first fins (37) distributed at intervals, the bottom of the first fin (37) is higher than the bottom of the second fin (38), and the first fin (37) and the second fin (38) are both made of elastic material.

5. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 1, characterized in that: The auxiliary heat collection component (4) comprises: A reflective plate (41) is rotatably disposed in the oblique support (2) and has an arc-shaped structure; a reduction motor (42), fixed on the oblique support (2) and used for driving the reflective plate (41); A center of gravity adjusting member (43) is fixed to the bottom of the reflective plate (41).

6. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 1, characterized in that: The water inlet end of the first water tank (5) is connected in series with the second water tank (8), and the water inlet end and the water outlet end of the first water tank (5) are both provided with valve bodies, and the total amount of water in the first water tank (5) can be adjusted by the cooperation between the second water tank (8) and the valve body.

7. The thermoelectric coupled heat pipe type vacuum tube solar collector according to claim 1, characterized in that: The water outlet end of the first water tank (5) is also connected in series with a temperature control cylinder (6) and a storage cylinder (7), wherein the temperature control cylinder (6) has a heating function.

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