Solar heat collection device

Abstract

The utility model relates to the technical field of solar heat collection, in particular to a solar heat collection device which comprises a heat collector composed of heat collection pipes, an air heat exchanger communicated with the heat collector through an air guide pipe, a water tank communicated with the air heat exchanger through a water pipe and an auxiliary heater communicated with the water tank. A coil pipe is arranged in the air heat exchanger, a gap for air circulation is formed between the coil pipe and a shell of the air heat exchanger, the water inlet end and the water outlet end of the coil pipe are communicated with the water tank through the water pipe to form a closed loop, and a first circulating pump is arranged on the water pipe; the air guide pipe, the inlet end of the heat collector and the outlet end of the heat collector form a closed loop, and a circulating air pump is arranged on the air guide pipe. Therefore, the solar heat collection device can solve the technical problems of frost damage of a low-temperature pipeline, high heating power consumption and heavy weight of a solar device.

Description

Technical Field

[0001] The present application relates to the technical field of solar heat collection, and more specifically, to a solar heat collection device. Background Art

[0002] As the global energy crisis and environmental pollution become increasingly serious, the development and utilization of solar energy as a clean and renewable energy source has received widespread attention. In heating systems, the use of solar energy for heating is considered an effective way to save energy. At present, most solar heating systems use a single-pass pipe design, in which hot water circulates in the pipe to transfer heat. However, this design has some obvious technical problems in cold winter weather. The comparative document CN103017353B has a complex structure and is inconvenient to install during on-site construction, especially in remote rural areas where construction conditions are poor and a large number of structures are inconvenient to access the site.

[0003] First, single-pass pipe systems are prone to freezing in low temperatures, leading to pipe cracking. This is because when water is stagnant or flowing slowly within the pipe, it easily freezes and expands at low temperatures, damaging the pipe. Furthermore, the pipes must be strong enough to withstand the pressure and weight of the water, which results in a heavy system and places high demands on the building's load-bearing structure.

[0004] Due to the aforementioned issues, traditional solar heating systems often fail to meet the needs of large numbers of users in densely populated areas such as schools. Without solar assistance, these facilities typically rely on electric heating to provide hot water. However, electric heating consumes a lot of energy, is expensive to operate, and poses environmental risks.

[0005] To address these issues, researchers have been exploring more effective solar heating technologies. For example, multi-energy complementary heating systems can improve heating stability and efficiency. These systems typically combine solar energy with other energy sources, such as ground-source heat pumps and air-source heat pumps, to achieve more efficient energy utilization. However, these systems often suffer from low system integration, complex operation, and difficult construction, limiting their wider application.

[0006] Furthermore, while electric heating systems offer a fast heating solution, their high energy consumption and operating costs remain a challenge. This is especially true in energy-intensive locations such as schools, where the economics and sustainability of electric heating systems have been questioned.

[0007] Therefore, developing a new type of solar heating system that can not only overcome technical defects but also provide an efficient and economical heating solution has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0008] Based on the above problems, the present application proposes a solar thermal collector device to solve the technical problems of freezing of low-temperature pipelines, high power consumption for heating, and heavy weight of the solar device.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0010] A solar heat collecting device comprises a heat collector composed of heat collecting tubes, an air heat exchanger connected to the heat collector via an air duct, a water tank connected to the air heat exchanger via a water pipe, and an auxiliary heat exchanger connected to the water tank;

[0011] The air heat exchanger is provided with a coil, a gap for air circulation is provided between the coil and the shell of the air heat exchanger, the water inlet and outlet of the coil are connected to the water tank through the water pipe to form a closed loop, and the water pipe is provided with a first circulation pump;

[0012] The air duct forms a closed loop with the inlet and outlet ends of the heat collector, and a circulating air pump is provided on the air duct;

[0013] The water tank and the auxiliary heater are connected through a separate pipeline to form a closed loop, and a second circulation pump is arranged on the pipeline.

[0014] In a specific possible implementation scheme, a first temperature detector is provided on the side wall inside the water tank, and the side wall of the water tank is covered with a thermal insulation layer.

[0015] In a specific feasible implementation scheme, the heat collecting tube is a double-pass type at both ends, at least one group of heat collectors is provided on the device, and at least one heat collecting tube is provided on a group of heat collectors. The heat collector includes an upper pass tube and a lower pass tube, and the heat collecting tube is located between the upper pass tube and the lower pass tube. The upper and lower ends of the heat collecting tube are respectively connected to the upper pass tube and the lower pass tube.

[0016] In a specific feasible implementation scheme, one end of the upper through-tube of each group of the collectors is closed and the other end is open, one end of the lower through-tube of each group of the collectors is closed and the other end is open, the open ends of the upper through-tube and the lower through-tube face oppositely, the open end of the upper through-tube is connected to the open end of the next upper through-tube, and the open end of the lower through-tube is connected to the open end of the next lower through-tube.

[0017] In a specific possible implementation scheme, a threaded pipe for increasing the heat exchange area is provided in the inner wall of the heat collecting pipe, and the threaded pipe is located in the upper half of the inner wall of the heat collecting pipe.

[0018] In a specific possible implementation scheme, a second temperature detector is provided on the inner wall of the upper through pipe of the last stage.

[0019] In a specific possible implementation scheme, the water tank is provided with a water inlet and a water outlet, and a third circulation pump is provided on the water outlet pipe provided on the water outlet.

[0020] Positive effects of this utility model:

[0021] Using solar energy as the main energy source and absorbing solar energy through collectors reduces dependence on electric heating, thereby reducing operating costs.

[0022] When solar energy is insufficient, the auxiliary heater serves as an auxiliary energy source. It can be electric heating or other energy forms, but it mainly relies on solar energy, thus reducing overall energy consumption. At the same time, the hot air flowing through the heat collecting tubes avoids the problem of water freezing and cracking in winter. The water tank in the device can be installed on the ground, effectively reducing the load-bearing pressure on the roof. The design of the device allows the use of solar energy in combination with other energy forms (such as ground source heat pumps and air source heat pumps). This multi-energy complementary heating system can improve energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0024] Figure 1 It is a structural diagram of the utility model structure;

[0025] Figure 2 This is a cross-sectional view of the heat collecting tube of the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the heat collector of the utility model;

[0027] Description of Reference Numerals

[0028] 1. Collecting tube; 2. Collector; 3. Air duct; 4. Air heat exchanger; 5. Water tank; 6. Auxiliary heater; 7. Water pipe; 8. Coil; 9. First circulation pump; 10. Circulating air pump; 11. Second circulation pump; 12. Insulation layer; 13. Upper pipe; 14. Lower pipe; 15. Threaded pipe; 16. Second thermometer; 17. Water outlet pipe; 18. Third circulation pump; 19. First thermometer; 20. Water inlet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Example

[0031] like Figure 1-3 As shown, a solar heat collection device includes a collector 2 composed of a heat collecting tube 1, the heat collecting tube 1 is a double-pass type at both ends, and at least one group of heat collectors 2 is provided on the device, and at least one heat collecting tube 1 is provided on a group of the heat collectors 2. The number of heat collecting tubes 1 and heat collectors 2 is selected according to the amount of heat used on site. In general, considering the accessories and assembly issues on site, most people choose to install thirty heat collecting tubes 1 in each group of heat collectors 2, and connect the heat collectors 2 in series in sequence. The hot air flows in the heat collecting tubes 1 to avoid the problem of water freezing and cracking in winter.

[0032] The heat collector 2 includes an upper tube 13 and a lower tube 14. The heat collecting tube 1 is located between the upper tube 13 and the lower tube 14. The upper tube 13 of each group of heat collectors 2 has one end sealed and the other end unsealed. The lower tube 14 of each group of heat collectors 2 has one end sealed and the other end unsealed. The unsealed ends of the upper tube 13 and the lower tube 14 face opposite directions. The upper and lower ends of the heat collecting tube 1 are respectively connected to the upper tube 13 and the lower tube 14. A threaded pipe 15 is provided within the inner wall of the heat collecting tube 1 to increase the heat exchange area with the air. The threaded pipe 15 is located in the upper half of the inner wall of the heat collecting tube 1.

[0033] The heat collector 2 is connected to an air heat exchanger 4 via an air duct 3, and the air heat exchanger 4 is connected to a water tank 5 via a water pipe 7. The water tank 5 is connected to an auxiliary heat source 6, which provides auxiliary heating when solar energy is insufficient, ensuring a stable hot water supply. This serves as a backup heat source, ensuring that hot water demand can still be met in extreme weather or when solar energy is insufficient.

[0034] The water tank 5 has a capacity of ten tons. A first thermometer 19 is provided on the side wall inside the water tank 5. The thermometer is provided inside the water tank 5 to monitor the water temperature in real time and realize intelligent temperature control by controlling the operation of the circulation pump.

[0035] The side walls of the water tank 5 are covered with a thermal insulation layer 12, which reduces heat loss and improves the thermal efficiency of the system.

[0036] A coil 8 is provided in the air heat exchanger 4. A gap for air circulation is provided between the coil 8 and the outer shell of the air heat exchanger 4 so that the high-temperature air flowing out of the heat collector 2 can heat the water in the coil 8. The water inlet and outlet of the coil 8 are connected to the water tank 5 through the water pipe 7 to form a closed loop. A first circulation pump 9 is provided on the water pipe 7.

[0037] The air duct 3 forms a closed loop with the inlet and outlet ends of the heat collector 2 and a circulating air pump 10 is provided on the air duct 3;

[0038] The water tank 5 and the auxiliary heat exchanger 6 are connected via a separate pipeline to form a closed loop, and a second circulation pump 11 is provided on the pipeline. When assembling the collector 2, the open end of the upper tube 13 is connected to the open end of the next upper tube 13, and the open end of the lower tube 14 is connected to the open end of the next lower tube 14. A second temperature detector 16 is provided on the inner wall of the upper tube 13 of the last stage. The water tank 5 is provided with a water inlet and a water outlet. The outlet pipe 17 provided at the outlet is provided with a third circulation pump 18, which is connected to a heating device requiring hot water through the outlet pipe.

[0039] When the device was installed and used on site, one set of the device was installed for each of the boys' and girls' dormitories in a certain school. Each of the boys' and girls' dormitories accommodates approximately 1,200 people. Each system is equipped with 540 heat collecting tubes and is connected to a ten-ton water tank. The measured water temperature is maintained between 30° and 45°. From August to September, one system consumes a total of 300 degrees of electricity, with an average power consumption of 0.25° per person, which greatly reduces power consumption. In addition, in rural areas where centralized heating is used, the use of solar energy as auxiliary heating has great application prospects and has significant economic and environmental benefits. Among the experimental users who have installed the device, compared with traditional coal-fired heating, the winter heating operating costs can be reduced by 75%, and natural gas heating by 80%. The entire investment in this device can be saved in three years.

[0040] The first circulation pump 9, circulating air pump 10, second circulation pump 11, second thermometer 16, and first thermometer 19 are connected to an external controller to monitor temperatures at various locations in real time, provide accurate data for system control, and help adjust the system's operating status to maximize heat collection efficiency. (The first, second, and third circulation pumps 18) have a high degree of automation, ensuring smooth water and air circulation, promoting the circulation of water or air in the system, and improving heat transfer efficiency. When using the collector 2, which heats the air, there is no need to consider scaling issues when heating the water, greatly reducing the risk of replacing and cleaning the collector 2.

[0041] In actual application, the water tank 5 and the heat exchanger can be removed, and the collector 2 can be connected to the drying room to realize the application of the drying room. It can be used in drying scenes below 120°.

[0042] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0043] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solar heat collecting device, characterized in that: It comprises a heat collector (2) composed of a heat collecting pipe (1), an air heat exchanger (4) connected to the heat collector (2) via an air guide pipe (3), a water tank (5) connected to the air heat exchanger (4) via a water pipe (7), and an auxiliary heat device (6) connected to the water tank (5); A coil (8) is provided in the air heat exchanger (4), a gap for air circulation is provided between the coil (8) and the shell of the air heat exchanger (4), the water inlet and outlet of the coil (8) are connected to the water tank (5) through the water pipe (7) to form a closed loop, and a first circulation pump (9) is provided on the water pipe (7); The air duct (3) forms a closed loop with the inlet and outlet ends of the heat collector (2), and a circulating air pump (10) is provided on the air duct (3); the water tank (5) and the auxiliary heat collector (6) are connected via a separate pipeline to form a closed loop, and a second circulating pump (11) is provided on the pipeline.

2. A solar heat collecting device according to claim 1, characterized in that: A first temperature measuring device (19) is provided on the side wall inside the water tank (5), and the side wall of the water tank (5) is covered with a heat-insulating layer (12).

3. A solar heat collecting device according to claim 1, characterized in that: The heat collecting tube (1) is of a double-pass type at both ends. At least one group of heat collectors (2) is provided on the device. At least one heat collecting tube (1) is provided on each group of heat collectors (2). The heat collector (2) comprises an upper pass tube (13) and a lower pass tube (14). The heat collecting tube (1) is located between the upper pass tube (13) and the lower pass tube (14). The upper and lower ends of the heat collecting tube (1) are respectively connected to the upper pass tube (13) and the lower pass tube (14).

4. A solar heat collecting device according to claim 3, characterized in that: One end of the upper tube (13) of each group of heat collectors (2) is closed and the other end is open, one end of the lower tube (14) of each group of heat collectors (2) is closed and the other end is open, the open ends of the upper tube (13) and the lower tube (14) face oppositely, the open end of the upper tube (13) is connected to the open end of the next upper tube (13), and the open end of the lower tube (14) is connected to the open end of the next lower tube (14).

5. A solar heat collecting device according to claim 1, characterized in that: A threaded pipe (15) for increasing the heat exchange area is provided inside the inner wall of the heat collecting pipe (1); the threaded pipe (15) is located in the upper half of the inner wall of the heat collecting pipe (1).

6. A solar heat collecting device according to claim 3, characterized in that: A second temperature detector (16) is provided on the inner wall of the upper through pipe (13) of the last stage.

7. A solar heat collecting device according to claim 3, characterized in that: The water tank (5) is provided with a water inlet and a water outlet, and a third circulation pump (18) is provided on the water outlet pipe (17) provided on the water outlet.

Images