Flat-plate solar collector

Abstract

The utility model provides a flat-plate solar collector which comprises a shell, a transparent cover plate, a heat insulation layer, a main flow pipeline, a branch flow pipeline, a heat absorption plate and a first connecting assembly, a heat collection cavity is formed in the shell, the transparent cover plate is fixed to an opening in the upper portion of the shell, and the heat insulation layer covers the inner surface of the shell. The front ends and the rear ends of the branch pipelines are fixed to the two main flow pipelines respectively and communicate with the main flow pipelines, the heat absorbing plates are fixed to the left sides and the right sides of the branch pipelines, the first connecting assembly comprises a first connecting pipe, an inner connecting sleeve and an outer connecting sleeve, threads are arranged outside the first connecting pipe, and the first connecting pipe transversely penetrates through the shell and is in threaded connection with the shell. Threads are arranged in the inner connecting sleeve, the left end and the right end of the inner connecting sleeve are in threaded connection with the main flow pipeline and the first connecting pipe respectively, threads are arranged in the outer connecting sleeve, the outer connecting sleeve corresponds to the outside of the shell, and one end of the outer connecting sleeve is in threaded connection with the first connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of solar collector technology, and in particular to a flat-plate solar collector. Background Technology

[0002] Flat-plate solar collectors are fundamental components of low-temperature solar thermal utilization. In a solar thermal system, they are non-concentrating components that receive solar radiation and transfer heat to the heat transfer medium. A flat-plate solar collector mainly consists of an absorber plate, a transparent cover plate, an insulation layer, and an outer shell. When the collector is operating, solar radiation passes through the transparent cover plate and is projected onto the absorber plate. The absorber plate absorbs the radiation and converts it into heat energy, which is then transferred to the heat transfer medium within the absorber plate, raising its temperature and providing the collector with usable energy output.

[0003] Traditionally, the absorber plate is fixed on both sides of the branch pipe, and the two ends of the branch pipe are welded to the main pipe and connected to the main pipe. Therefore, the main pipe needs to pass through the outer shell first, and then welding is carried out inside the outer shell. However, after welding, the main pipe, branch pipe and absorber plate are all restricted inside the outer shell and cannot be removed. This brings inconvenience to daily inspection and maintenance. For example, when it is necessary to replace one of the branch pipes, it is necessary to cut and re-weld inside the outer shell. Not only is the operation difficult, but waste particles from maintenance will cover the insulation layer and are not easy to clean. In order to solve the above problems, it is necessary to manufacture a flat plate solar collector. Utility Model Content

[0004] The purpose of this invention is to provide a flat-plate solar collector to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flat-plate solar collector includes a shell, a transparent cover, a heat insulation layer, a main pipe, branch pipes, a heat absorption plate, and a first connecting assembly. The shell contains a heat collection cavity. The transparent cover is fixed to an opening at the top of the shell. The heat insulation layer covers the inner surface of the shell. The main pipe is arranged laterally, with two sets corresponding to the front and rear sides of the shell. The front and rear ends of the branch pipes are fixed to the two sets of main pipes and connected to them. Multiple sets of branch pipes are evenly arranged laterally. The heat absorption plate is fixed to the left and right sides of the branch pipes. The first connecting assembly includes a first connecting pipe, an inner connecting sleeve, and an outer connecting sleeve. The first connecting pipe has threads on its exterior and passes laterally through the shell, threadedly connected to it. The inner connecting sleeve has threads inside, corresponding to the heat collection cavity, and its left and right ends are threadedly connected to the main pipe and the first connecting pipe, respectively. The outer connecting sleeve has threads inside, corresponding to the exterior of the shell, and one end is threadedly connected to the first connecting pipe.

[0007] Further description of this utility model: The outer contours of both the inner connecting sleeve and the outer connecting sleeve are hexagonal.

[0008] Further description of the present invention: It also includes a second connecting component, which includes a second connecting tube and a closed sleeve. The second connecting tube passes through the outer shell longitudinally and is threaded to the outer shell. The closed sleeve is threaded inside and one end of the closed sleeve is open and threaded to the outer end of the second connecting tube. Four sets of the second connecting components are symmetrically arranged on the front and rear sides of the outer shell.

[0009] Further description of this utility model: It also includes multiple sets of tee connecting pipes, each tee connecting pipe including a longitudinal pipe and a transverse pipe that are interconnected. Both ends of the branch pipe are fixed on the longitudinal pipe. The main pipe includes multiple sets of end pipes and middle connecting pipes. The left and right ends of the middle connecting pipe are respectively inserted into two adjacent sets of transverse pipes and are threadedly connected to the transverse pipes. The thread directions of the left and right ends of the middle connecting pipe are opposite. The left and right ends of the end pipes are respectively threadedly connected to the inner connecting sleeve and the transverse pipe.

[0010] Further description of this utility model: The thread direction of the end pipe and the first connecting pipe is the same.

[0011] Further description of this utility model: The front and rear ends of the branch pipe are respectively threaded to the longitudinal pipe.

[0012] The beneficial effects of this utility model are as follows: During installation, the heat insulation layer is first installed in the heat collection cavity of the outer shell. Then, the first connecting pipe is screwed into the outer shell through threads. An inner connecting sleeve is installed on the inner end of the first connecting pipe, and the inner connecting sleeve is rotated as much as possible towards the inner wall of the outer shell to provide more space for subsequent installation. Then, the assembled main pipe, branch pipe, and heat absorber plate are placed downwards into the heat collection cavity. The inner connecting sleeve is rotated towards the main pipe and connected to the main pipe, thereby achieving the fixation and connection between the main pipe and the first connecting pipe. Next, an outer connecting sleeve is installed on the outer end of the first connecting pipe. The outer connecting sleeve is used to connect with the external thread of the pipe on the electrical appliance. If the pipe on the electrical appliance is internally threaded, it is not necessary to... Using an external connecting sleeve, or by rotating the external connecting sleeve toward the outer casing to expose the outer end of the first connecting pipe, the electrical pipe is directly threaded into the first connecting pipe. This process is repeated for the four main pipe ports on the outer casing. After installing the transparent cover, the installation is complete. When maintenance is required on the main pipe, branch pipe, or absorber plate, remove the transparent cover and rotate the entire inner connecting sleeve toward the inner wall of the outer casing to disconnect the main pipe from the first connecting assembly. This allows the main pipe, branch pipe, and absorber plate to be removed together for easy maintenance. Furthermore, it prevents waste generated during maintenance from spilling into the heat collection chamber, thus improving maintenance efficiency and maintaining the cleanliness of the collector's interior. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the present invention (with a partial cross-sectional view of the transparent cover plate);

[0014] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle;

[0015] Figure 3 This is a structural diagram of the first connecting component in this utility model;

[0016] Figure 4 This is a structural diagram of the second connecting component in this utility model;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Outer shell; 11. Heat collection chamber; 2. Transparent cover; 3. Insulation layer; 4. Main stream pipe; 41. End pipe; 42. Middle connecting pipe; 5. Branch pipe; 6. Absorber plate; 7. First connecting assembly;

[0019] 71. First connecting pipe; 72. Inner connecting sleeve; 73. Outer connecting sleeve; 8. Second connecting assembly;

[0020] 81. Second connecting pipe; 82. Sealing sleeve; 9. Tee connecting pipe; 91. Longitudinal pipe; 92. Horizontal pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figures 1 to 4 As shown, a flat-plate solar collector includes a shell 1, a transparent cover plate 2, a heat insulation layer 3, a main flow pipe 4, branch flow pipes 5, a heat absorption plate 6, and a first connecting assembly 7. The shell 1 contains a heat collection cavity 11. The transparent cover plate 2 is fixed to the opening at the top of the shell 1. The heat insulation layer 3 covers the inner surface of the shell 1. The main flow pipe 4 is arranged laterally, with two sets corresponding to the front and rear sides of the shell 1. The front and rear ends of the branch flow pipes 5 are respectively fixed to the two sets of main flow pipes 4 and connected to them. Multiple sets of branch flow pipes 5 are evenly arranged laterally. The heat absorption plate... 6 is fixed on the left and right sides of the branch pipe 5. The first connecting component 7 includes a first connecting pipe 71, an inner connecting sleeve 72 and an outer connecting sleeve 73. The first connecting pipe 71 is threaded on the outside and passes through the outer shell 1 in a transverse direction and is threaded to the outer shell 1. The inner connecting sleeve 72 is threaded inside and corresponds to the heat collection cavity 11. Its left and right ends are threaded to the main pipe 4 and the first connecting pipe 71, respectively. The outer connecting sleeve 73 is threaded inside and corresponds to the outside of the outer shell 1. One end of the outer connecting sleeve 73 is threaded to the first connecting pipe 71.

[0023] During installation, the insulation layer 3 is first installed inside the heat collection cavity 11 of the outer shell 1. Then, the first connecting pipe 71 is screwed into the outer shell 1. An inner connecting sleeve 72 is installed on the inner end of the first connecting pipe 71, with the inner connecting sleeve 72 rotated as close as possible to the inner wall of the outer shell 1 to provide more space for subsequent installation. Next, the assembled main stream pipe 4, branch pipe 5, and heat absorber plate 6 are placed downwards into the heat collection cavity 11. The inner connecting sleeve 72 is rotated towards the main stream pipe 4 and connected to it, thus fixing and connecting the main stream pipe 4 and the first connecting pipe 71. Then, an outer connecting sleeve 73 is installed on the outer end of the first connecting pipe 71. The outer connecting sleeve 73 is used for external thread connection to the pipes on the electrical appliance. If the pipes on the electrical appliance are internally threaded, an outer connecting sleeve 73 is not required. Connect the sleeve 73, or rotate the outer connecting sleeve 73 toward the outer casing 1 so that the outer end of the first connecting pipe 71 is exposed. The electrical pipe is directly threaded to the first connecting pipe 71. This operation is performed on the ports of the four main pipes 4 on the outer casing 1. After installing the transparent cover plate 2, the installation can be completed. When it is necessary to repair the main pipe 4, the branch pipe 5, or the heat absorber plate 6, remove the transparent cover plate 2 and rotate the inner connecting sleeve 72 toward the inner wall of the outer casing 1 to disengage the main pipe 4 from the first connecting component 7. Then the main pipe 4, the branch pipe 5, and the heat absorber plate 6 can be taken out together for easy repair. Moreover, the waste generated during the repair will not be spilled into the heat collection cavity 11, which improves the efficiency of repair and maintains the cleanliness of the inside of the heat collector.

[0024] The outer contours of both the inner connecting sleeve 72 and the outer connecting sleeve 73 are hexagonal, which makes it easy to rotate the inner connecting sleeve 72 and the outer connecting sleeve 73 using an adjustable wrench.

[0025] This design also includes a second connecting component 8, which includes a second connecting pipe 81 and a closed sleeve 82. The second connecting pipe 81 passes through the outer shell 1 longitudinally and is threaded to the outer shell 1. The closed sleeve 82 has internal threads, and one end of the closed sleeve 82 is open and threaded to the outer end of the second connecting pipe 81. Four sets of the second connecting components 8 are symmetrically arranged on the front and rear sides of the outer shell 1.

[0026] The second connecting component 8 is provided to accommodate the longitudinal installation of the main pipe 4. If the main pipe 4 is installed transversely, the sealing sleeve 82 is installed at the outer end of the second connecting pipe 81 to prevent heat from dissipating outward. If the main pipe 4 is installed longitudinally, the sealing sleeve 82 is removed and installed at the outer end of the first connecting pipe 71. At the same time, the inner connecting sleeve 72 and the outer connecting sleeve 73 are removed and installed at the inner and outer ends of the second connecting pipe 81, respectively. In this case, the functions of the second connecting pipe 81 and the first connecting pipe 71 are interchanged, so that the main pipe 4 can be connected to the second connecting pipe 81.

[0027] This design also includes multiple sets of tee connecting pipes 9. The tee connecting pipes 9 include interconnected longitudinal pipes 91 and transverse pipes 92. Both ends of the branch pipe 5 are fixed on the longitudinal pipe 91. The main pipe 4 includes multiple sets of end pipes 41 and middle connecting pipes 42. The left and right ends of the middle connecting pipe 42 are respectively inserted into two adjacent sets of transverse pipes 92 and are threadedly connected to the transverse pipes 92. The thread directions of the left and right ends of the middle connecting pipe 42 are opposite. The left and right ends of the end pipes 41 are respectively threadedly connected to the inner connecting sleeve 72 and the transverse pipe 92.

[0028] By setting multiple sets of tee connecting pipes 9 and middle connecting pipes 42, a branch pipe 5 can be directly dismantled for maintenance. Specifically, the inner connecting sleeve 72 is first rotated toward the inner wall of the shell to disconnect it from the end pipe 41 and provide space for dismantling. Since the threads at the left and right ends of the middle connecting pipe 42 are opposite, rotating the middle connecting pipe 42 at this time can cause the tee connecting pipes 9 on both sides to move in the opposite direction from the middle connecting pipe 42 and disengage, thereby dismantling a branch pipe 5.

[0029] The end pipe 41 and the first connecting pipe 71 have the same thread direction. This ensures that the end pipe 41 and the first connecting pipe 71 will not move relative to each other when the inner connecting sleeve 72 is rotated, thus facilitating the connection or disconnection of the two. If the thread directions of the end pipe 41 and the first connecting pipe 71 are opposite, the first connecting pipe 71 needs to be rotated first to disconnect it from the inner connecting sleeve 72 before the inner connecting sleeve 72 can be removed from the end pipe 41.

[0030] The front and rear ends of the branch pipe 5 are threaded to the longitudinal pipe 91, respectively, so as to assemble, disassemble or replace the branch pipe 5 from the tee connecting pipe 9.

[0031] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A flat-plate solar collector, characterized in that: The device includes an outer shell, a transparent cover, a heat insulation layer, a main flow pipe, branch flow pipes, a heat absorption plate, and a first connecting assembly. The outer shell contains a heat collection cavity. The transparent cover is fixed to an opening at the top of the outer shell. The heat insulation layer covers the inner surface of the outer shell. The main flow pipe is arranged laterally, with two sets corresponding to the front and rear sides of the outer shell. The front and rear ends of the branch flow pipes are fixed to the two sets of main flow pipes and communicate with them. Multiple sets of branch flow pipes are evenly arranged laterally. The heat absorption plate is fixed to the left and right sides of the branch flow pipes. The first connecting assembly includes a first connecting pipe, an inner connecting sleeve, and an outer connecting sleeve. The first connecting pipe has external threads and passes laterally through the outer shell, threadedly connected to it. The inner connecting sleeve has internal threads and corresponds to the heat collection cavity, with its left and right ends threadedly connected to the main flow pipe and the first connecting pipe, respectively. The outer connecting sleeve has internal threads and corresponds to the outside of the outer shell, with one end threadedly connected to the first connecting pipe.

2. A flat-plate solar collector according to claim 1, characterized in that: Both the inner connecting sleeve and the outer connecting sleeve have hexagonal outer contours.

3. A flat-plate solar collector according to claim 1, characterized in that: It also includes a second connecting assembly, which includes a second connecting tube and a closed sleeve. The second connecting tube passes through the outer shell longitudinally and is threaded to the outer shell. The closed sleeve has internal threads and one end of the closed sleeve is open and threaded to the outer end of the second connecting tube. Four sets of the second connecting assemblies are symmetrically arranged on the front and rear sides of the outer shell.

4. A flat-plate solar collector according to claim 1, characterized in that: It also includes multiple sets of tee connecting pipes, each tee connecting pipe comprising a longitudinal pipe and a transverse pipe that are interconnected. Both ends of the branch pipe are fixed to the longitudinal pipe. The main pipe comprises multiple sets of end pipes and middle connecting pipes. The left and right ends of the middle connecting pipe are respectively inserted into two adjacent sets of transverse pipes and are threadedly connected to the transverse pipes. The thread directions of the left and right ends of the middle connecting pipe are opposite. The left and right ends of the end pipes are respectively threadedly connected to the inner connecting sleeve and the transverse pipe.

5. A flat-plate solar collector according to claim 4, characterized in that: The end pipe and the first connecting pipe have the same thread direction.

6. A flat-plate solar collector according to claim 4, characterized in that: The front and rear ends of the branch pipe are respectively threaded to the longitudinal pipe.

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