Solar heat collection system

Abstract

The utility model discloses a solar heat collecting system which comprises a plurality of solar heat collectors and a heat exchange box, each solar heat collector comprises a fixed support, a plurality of vacuum tubes are arranged on the fixed support at intervals, and heat conducting media are filled in the vacuum tubes. A connecting copper pipe is arranged between every two adjacent vacuum pipes, and the multiple vacuum pipes and the multiple connecting copper pipes are connected to form an S-shaped structure. A plurality of reflectors are rotationally arranged on the fixed bracket, are in one-to-one correspondence with the vacuum tubes, are positioned on the back surfaces of the vacuum tubes and can rotate by taking the vacuum tubes as axes so as to reflect light onto the vacuum tubes. The reflecting plate is rotatably connected with the fixing support, multi-angle arbitrary adjustment can be achieved, and the LED lamp is widely suitable for the use environment of global illumination latitude. The reflector is arranged on the back surface of the vacuum tube to form a light gathering effect, the light receiving surface of the vacuum tube is increased, light reflection and illumination are complementary, and the heat collecting efficiency of the vacuum tube is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of solar collector technology, and specifically relates to a solar thermal collection system. Background Technology

[0002] A solar collector is a device that converts solar radiation into heat energy. Because solar energy is relatively dispersed, it must be concentrated; therefore, the collector is a key component of various solar energy utilization devices. Due to different applications, solar collectors and their matching systems are classified into many types with different names, such as solar cookers for cooking, solar water heaters for producing hot water, solar dryers for drying items, solar furnaces for smelting metals, as well as solar houses, solar thermal power plants, solar desalination plants, and so on.

[0003] Chinese patent document CN212274285U discloses a serpentine solar vacuum glass tube pressure collector and collector system, relating to the field of collector technology. The collector includes two manifolds and multiple straight-through solar vacuum glass collector tubes disposed between the two manifolds. Each manifold has multiple perforations along the distribution direction of the straight-through solar vacuum glass collector tubes. The two ends of each straight-through solar vacuum glass collector tube pass through corresponding perforations on the two manifolds. Each straight-through solar vacuum glass collector tube contains a heat-conducting metal straight tube. An elastic straight tube bracket is provided between each straight-through solar vacuum glass collector tube and its corresponding heat-conducting metal straight tube. A connecting fitting connects the heat-conducting metal straight tubes at the heads of adjacent straight-through solar vacuum glass collector tubes, forming an S-shaped serpentine pipe. The aforementioned patent document has the effect of controlling the upper limit of the temperature of the heat transfer medium within a controllable time range. However, its scheme of directly collecting light through heat collection tubes has limited heat collection efficiency due to the limited light-receiving surface of the heat collection tubes. Utility Model Content

[0004] The purpose of this invention is to provide a solar thermal collection system to solve the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a solar thermal collector system, comprising a plurality of solar collectors and a heat exchange box, wherein a heat exchange coil is provided inside the heat exchange box, and the heat exchange coil is connected to the vacuum tube of each solar collector; the solar collector includes a fixed support, and a plurality of vacuum tubes are spaced apart on the fixed support, the vacuum tubes being filled with a heat-conducting medium; a connecting copper pipe is provided between adjacent vacuum tubes, and the plurality of vacuum tubes and the plurality of connecting copper pipes are connected to form an S-shaped structure; a plurality of reflectors are rotatably provided on the fixed support, the plurality of reflectors being arranged one-to-one with the plurality of vacuum tubes, the reflectors being located on the back of the vacuum tubes and being able to rotate about the vacuum tube as an axis to reflect light onto the vacuum tubes; the heat-conducting medium is heat-conducting oil.

[0006] As an optional implementation of the above technical solution, the reflector has a C-shaped cross-section.

[0007] As an optional implementation of the above technical solution, the reflector is a stainless steel plate.

[0008] As an optional implementation of the above technical solution, the distance between the reflector and the vacuum tube is 5cm-15cm.

[0009] As an optional implementation of the above technical solution, the distance between the reflector and the vacuum tube is 9.5cm.

[0010] As an optional implementation of the above technical solution, the fixed bracket includes two tripods arranged opposite each other, and protective sleeves are inclinedly provided on the tripods. The two ends of the vacuum tube are respectively installed on the two protective sleeves, and the connecting copper tube is arranged inside the protective sleeves.

[0011] As an optional implementation of the above technical solution, the protective sleeve has a D-shaped cross-section.

[0012] As an optional implementation of the above technical solution, the protective sleeve is made of stainless steel.

[0013] As an optional implementation of the above technical solution, multiple vacuum tubes are arranged in parallel on the same plane, and the plane where the vacuum tubes are located makes an angle of 36 degrees with the ground.

[0014] As an optional implementation of the above technical solution, the heat exchange box is provided with an input pipe and an output pipe. The vacuum tube at the top of the solar collector is connected to one end of the heat exchange coil through the input pipe, and the vacuum tube at the bottom of the solar collector is connected to the other end of the heat exchange coil through the output pipe.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model features multiple reflectors rotatably mounted on a fixed bracket. Each reflector corresponds to a vacuum tube, and the reflectors are located on the back of the vacuum tubes and can rotate around the tubes to reflect light onto them. The reflectors are rotatably connected to the fixed bracket, allowing for multi-angle adjustment and making it widely applicable to various latitudes and lighting conditions worldwide. By placing the reflectors on the back of the vacuum tubes, this utility model creates a focusing effect, increases the light-receiving surface of the vacuum tubes, and achieves complementary reflection and illumination, significantly improving the heat collection efficiency of the vacuum tubes.

[0017] 2. This utility model requires only a small amount of energy to drive the entire solar thermal system to operate normally. It ensures efficient heat transfer while also being economical. Moreover, it is simpler to operate and maintain, making it suitable for large-scale promotion and application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a solar thermal collector system in one embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the vacuum tube and the connecting copper tube in one embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the reflector structure in one embodiment of the present invention.

[0021] In the diagram: 1-vacuum tube; 2-connecting copper tube; 3-reflector; 4-tripod; 5-protective sleeve; 6-heat exchange box; 7-heat exchange coil; 8-input tube; 9-output tube. Detailed Implementation

[0022] This embodiment provides a solar collector, including a fixed bracket with multiple horizontally spaced vacuum tubes 1. Each vacuum tube 1 is filled with a heat-conducting medium, typically heat-conducting oil. The vacuum tubes 1 transfer heat to the heat-conducting oil, which then transfers the heat to water, thus providing hot water for the user. Figure 2 As shown, a connecting copper pipe 2 is provided between two adjacent vacuum tubes 1, and multiple vacuum tubes 1 and multiple connecting copper pipes 2 are connected to form an S-shaped structure. The connecting copper pipe 2 is a bent pipe with a diameter of 8mm. Multiple connecting copper pipes 2 are used to connect multiple vacuum tubes 1 to facilitate the circulation of heat transfer oil in the vacuum tubes 1.

[0023] like Figure 1As shown, multiple reflectors 3 are rotatably mounted on the fixed bracket, with each reflector 3 corresponding to a vacuum tube 1. The reflectors 3 are located on the back of the vacuum tube 1 and can rotate around the vacuum tube 1 to reflect light onto it. The reflectors 3 are rotatably connected to the fixed bracket, allowing for multi-angle adjustment and making them widely applicable to various latitudes of sunlight worldwide. This invention places the reflectors 3 on the back of the vacuum tube 1, creating a light-gathering effect, increasing the light-receiving surface of the vacuum tube 1, and complementing the reflection and illumination to greatly improve the heat collection efficiency of the vacuum tube 1.

[0024] To further improve the heat collection efficiency of vacuum tube 1, such as Figure 3 As shown, the reflector 3 has a C-shaped cross-section and is made of stainless steel to increase its service life. The distance between the reflector 3 and the vacuum tube 1 is 5cm-15cm. Preferably, the distance is 9.5cm. In this invention, the optimal distance between the reflector 3 and the vacuum tube 1 is 9.5cm, which provides good light-gathering effect and the complementary effect of reflection and illumination, significantly improving the heat collection efficiency of the vacuum tube 1.

[0025] In one specific embodiment, the fixing bracket includes two opposing tripods 4, with protective sleeves 5 inclinedly mounted on the tripods 4. The two ends of the vacuum tube 1 are respectively mounted on the two protective sleeves 5, and the connecting copper tube 2 is disposed inside the protective sleeves 5. The protective sleeves 5 have a D-shaped cross-section and are made of stainless steel, providing stable support for the vacuum tube 1 from the fixing bracket.

[0026] In this design, multiple vacuum tubes 1 are arranged in parallel on the same plane, and the plane containing the vacuum tubes 1 makes an angle of 36 degrees with the ground. That is, the protective sleeve 5 maintains an acute angle of 36 degrees with the ground. The solar collector adopts this design method, which has the following advantages: First, the solar collector has the best light-collecting angle; second, the solar collector has strong wind resistance; and third, the solar collector occupies a small area.

[0027] like Figure 1 As shown, this embodiment also provides a solar thermal collector system, including several of the aforementioned solar collectors and a heat exchange box 6. The heat exchange box 6 contains heat exchange coils 7, which are connected to the vacuum tubes 1 of each solar collector. The heat exchange box 6 has an inlet and an outlet. Low-temperature water is supplied to the heat exchange box 6 through the inlet to exchange heat with the heat exchange coils 7, and the resulting hot water is output through the outlet. Multiple solar collectors are typically arranged side-by-side to reduce floor space. The multiple solar collectors supply heated thermal oil to the heat exchange box 6, where the high-temperature thermal oil inside the heat exchange coils 7 exchanges heat with the low-temperature water inside the heat exchange box 6. The cooled thermal oil is then returned to the vacuum tubes 1, and the heated water is delivered to the user.

[0028] The heat exchange box 6 is externally equipped with an input pipe 8 and an output pipe 9. A power circulation device is installed on the input pipe 8 or the output pipe 9. The vacuum tube 1 at the top of the solar collector is connected to one end of the heat exchange coil 7 through the input pipe 8, and the vacuum tube 1 at the bottom of the solar collector is connected to the other end of the heat exchange coil 7 through the output pipe 9. The power circulation device drives the heat transfer oil to circulate, thereby achieving heat output.

[0029] This invention perfectly combines a vacuum tube 1 with a connecting copper tube 2. When strong light shines on the vacuum tube 1, the temperature inside the tube reaches as high as 250 degrees Celsius, and the copper tube has excellent thermal conductivity. Furthermore, industrial-grade heat transfer oil is used inside the vacuum tube 1. This oil circulates in a high-temperature environment, with an outlet oil temperature reaching 150 degrees Celsius and a return temperature of 95-102 degrees Celsius. The heat exchange rate between the heat transfer oil and water in the heat exchange box 6 is as high as 85%, resulting in minimal heat loss. Moreover, apart from the power circulation equipment, there is no other energy consumption, leading to low operating costs and high practicality.

[0030] During the heat collection process, the reflector 3 with a stainless steel mirror surface plays a significant role. The optimal distance between the reflector 3 and the vacuum tube 1 is 9.5cm, providing complementary reflection and illumination to improve thermal efficiency. Moreover, the reflector 3 can be adjusted at multiple angles to keep the vacuum tube 1 in the best state of collecting sunlight, making it widely applicable to various latitudes around the world.

[0031] This invention requires only a small amount of energy to drive the entire solar thermal system to operate normally. It ensures efficient heat transfer while also being economical. Moreover, it is simpler to operate and maintain, making it suitable for widespread promotion and application.

[0032] In this description of the utility model, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this utility model is not limited to the specific implementation methods described above. Based on the basic technical concept of this utility model, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this utility model.

Claims

1. A solar thermal system, characterized in that, The solar energy collector comprises a plurality of solar energy collectors and a heat exchange box (6) provided with a heat exchange coil (7) therein, the heat exchange coil (7) being communicated with the vacuum tubes (1) of the solar energy collectors; The solar energy collector comprises a plurality of solar energy collectors and a heat exchange box (6) provided with a heat exchange coil (7) therein, the heat exchange coil (7) being communicated with the vacuum tubes (1) of the solar energy collectors; The heat conducting medium is heat conducting oil.

2. The solar thermal system of claim 1, wherein, The heat exchange box (6) is externally provided with an input pipe (8) and an output pipe (9), the vacuum tube (1) at the top of the solar energy collector is connected with one end of the heat exchange coil (7) through the input pipe (8), and the vacuum tube (1) at the bottom of the solar energy collector is connected with the other end of the heat exchange coil (7) through the output pipe (9).

3. The solar thermal system of claim 1, wherein, The cross section of the light reflecting plate (3) is C-shaped.

4. The solar thermal system of claim 1, wherein, The distance between the light reflecting plate (3) and the vacuum tube (1) is 5-15 cm.

5. The solar thermal system of claim 4, wherein, The distance between the light reflecting plate (3) and the vacuum tube (1) is 9.5 cm.

6. The solar thermal system of claim 1, wherein, The fixing support comprises two oppositely arranged tripods (4), the tripods (4) are obliquely provided with protective sleeves (5), the two ends of the vacuum tube (1) are respectively mounted on the two protective sleeves (5), and the connecting copper pipe (2) is arranged in the protective sleeve (5).

7. The solar thermal system of claim 6, wherein, The cross section of the protective sleeve (5) is D-shaped, and the protective sleeve (5) is made of stainless steel.

8. The solar collector system of claim 1, wherein, The plurality of vacuum tubes (1) are arranged in parallel in the same plane, and the angle between the plane where the vacuum tubes (1) are arranged and the ground is 36 degrees.

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