Roof distributed solar anti-freezing and anti-overheating system

Abstract

The utility model relates to the technical field of new energy, in particular to a roof distribution type solar anti-freezing and anti-overheating system which comprises a plurality of solar heat collectors, a drain outlet connected with an internal flow channel of each flat plate type solar heat collector is formed in the bottom of each solar heat collector, and a liquid drainage pipeline connected with the drain outlet is arranged below each solar heat collector. Media in the heat collector are discharged through the drain outlet and the drainage pipeline, and equipment damage caused by freezing of the internal media is prevented. And the liquid drainage pipeline can quickly and effectively drain the internal medium, so that the overheating protection function of the solar heat collector is ensured, and the safety and efficiency of the system are improved. And the medium in the liquid drainage main pipe flows back to the recovery tank by virtue of gravity. Liquid drainage is stable and reliable, and energy consumption and operation cost of the system are low. An electric valve is arranged on the liquid drainage main pipe and electrically connected with the storage battery system, liquid drainage is independently and automatically controlled, and intelligent and convenient automatic management of the system is achieved. The medium in the recovery tank flows back into the solar heat collector through the liquid supplementing pump, the medium of the system is recycled, and stability and reliability of the system are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a roof distributed solar energy anti-freezing and anti-overheating system. Background Technique

[0002] At present, the most widely used solar thermal system; when the system suddenly loses power, the circulation pump stops, and the solar collector is in a state of stagnant sun exposure. The temperature and pressure of the medium will increase sharply. This will cause problems such as medium gasification, joint leakage, damage to the collector flow channel, and reduced service life.

[0003] When the system is powered off for a long time, the circulation pump stops. When the ambient temperature is low, there is a risk of freezing of the medium in the solar collector, resulting in freezing and cracking of the collector flow channel, equipment damage, and medium loss. When the system resumes power, it needs to be shut down for maintenance before refilling the liquid and running again.

[0004] After the solar collector operates for a long time, impurities are likely to be generated in the system, which can cause blockage of the inner branch pipes in the collector, resulting in poor medium flow and reduced heat collection efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, to solve the problems raised in the above background technique, the technical problem to be solved by the utility model is to provide a roof distributed solar energy anti-freezing and anti-overheating system with reasonable design, which can smoothly and timely discharge, collect and recycle the medium in the solar collector quickly.

[0006] The technical problem to be solved by the utility model is realized through the following technical solutions. A roof distributed solar energy anti-freezing and anti-overheating system includes a plurality of solar collectors laid on the roof or at a high place. A sewage discharge port connected to the internal flow channel of the flat solar collector is provided at the bottom of the solar collector. A liquid discharge pipeline connected to the sewage discharge port is provided below the solar collector. After the liquid discharge pipelines are connected in parallel, they are connected to a liquid discharge main pipe. A recovery tank is provided at the end of the liquid discharge main pipe. An electric valve is provided on the liquid discharge main pipe, and the electric valve is electrically connected to a battery system. The system discharges the medium in the collector through the sewage discharge port and the liquid discharge pipeline to prevent equipment damage caused by freezing of the internal medium. The liquid discharge pipeline can quickly and effectively empty the internal medium, ensure the overheat protection function of the solar collector, and improve the safety and efficiency of the system. The electric valve is electrically connected to the battery system, and independently and automatically controls the liquid discharge to realize the intelligent and convenient automatic management of the system.

[0007] As a further solution of the present utility model, the main liquid discharge pipe is arranged as a ramp pipe inclined towards the recovery tank, and the medium in the main liquid discharge pipe flows back to the recovery tank by gravity. The medium flows smoothly into the recovery tank by gravity, avoiding the risk of blockage and water accumulation problems during the drainage process, and the liquid discharge is stable and reliable. At the same time, the dependence on pumps or other mechanical equipment is reduced, thereby reducing the energy consumption and operating costs of the system.

[0008] As a further solution of the present utility model, the sewage outlet is connected to the internal flow channel of the solar collector and extends to the outside of the frame of the solar collector, and the medium in the internal flow channel of the solar collector flows to the sewage outlet to be unloaded. Ensuring the smooth outflow of the medium can avoid the risks of overheating and freezing of the collector, and ensure the stability and reliability of the system under different working conditions.

[0009] As a further solution of the present utility model, the bottom of the recovery tank is provided with a water outlet, a liquid supplement pipeline is connected to the water outlet, and the end of the liquid supplement pipeline is connected with a circulation pump for driving the heat exchange cycle in the solar collector. The liquid supplement pipeline is connected to the liquid supplement port of the circulation pump, and a liquid supplement pump is provided on the liquid supplement pipeline. Through the liquid supplement pipeline and the liquid supplement pump, the system can automatically supplement the liquid in the solar collector to keep the system running normally. The thermal performance of the system is optimized, thereby improving the overall energy utilization efficiency.

[0010] As a further solution of the present utility model, an exhaust valve for exhausting or supplementing air for the system is provided at the high end of the solar collector or the liquid discharge pipe. The exhaust valve effectively exhausts the air in the system or is used to supplement the gas in the system, ensuring the exhaust during the normal operation of the system and the smooth drainage of the medium under abnormal conditions such as overheating and freezing, which helps to improve the overall thermal efficiency of the collector.

[0011] As a further solution of the present utility model, the battery system includes a battery and a power supply circuit, and the battery supplies power to the electric valve through the power supply circuit to control the opening and closing of the electric valve. In the case of interruption or instability of the main power supply, the battery serves as a power supply to ensure the normal operation of the electric valve and enhance the reliability of the system; using the battery can store and utilize electric power when needed, which helps to reduce the dependence on the main power supply.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: The system includes several solar collectors laid on the roof or at a high place. A sewage outlet connected to the internal flow channel of the flat-plate solar collector is provided at the bottom of the solar collector. A liquid discharge pipeline connected to the sewage outlet is provided below the solar collector. The system discharges the medium in the collector through the sewage outlet and the liquid discharge pipeline to prevent equipment damage caused by freezing of the internal medium. The liquid discharge pipeline can quickly and effectively empty the internal medium, ensure the overheat protection function of the solar collector, and improve the safety and efficiency of the system. The medium in the main liquid discharge pipe flows back to the recovery tank by gravity. The liquid discharge is stable and reliable, and the energy consumption and operation cost of the system are low.

[0013] An electric valve is provided on the main liquid discharge pipe. The electric valve is electrically connected to the battery system to independently and automatically control the liquid discharge, realizing intelligent and convenient automatic management of the system.

[0014] The medium in the recovery tank flows back to the solar collector through the liquid replenishing pump, and the system medium is recycled to ensure the stable and reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the system principle of the utility model.

[0016] In the figure: 1 - solar collector, 101 - exhaust valve, 102 - sewage outlet, 103 - circulation pump, 2 - liquid discharge pipeline, 3 - main liquid discharge pipe, 4 - electric valve, 5 - battery system, 6 - recovery tank, 7 - liquid replenishing pipeline, 701 - liquid replenishing pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further details the utility model through embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0018] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model.

[0019] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature means that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature means that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0020] As shown in the attached Figure 1 figure, a roof distributed solar energy anti-freezing and anti-overheating system includes a plurality of solar collectors 1 laid on a roof or at a high place, and the plurality of solar collectors are connected in sequence.

[0021] A sewage discharge port 102 connected to the internal flow channel of the flat plate solar collector is provided at the bottom of the solar collector. The sewage discharge port is connected to the internal flow channel of the solar collector and extends to the outside of the frame of the solar collector. The medium in the internal flow channel of the solar collector flows to the sewage discharge port and is discharged. A liquid discharge pipeline 2 connected to the sewage discharge port is provided below the solar collector. The medium in the solar collector flows out along the sewage discharge port and enters the liquid discharge pipeline, and the system always remains stable under different working conditions.

[0022] The liquid discharge pipelines are connected in parallel and then connected to a main liquid discharge pipe 3. A recovery tank is provided at the end of the main liquid discharge pipe. The main liquid discharge pipe is arranged as a ramp pipeline inclined towards the recovery tank, and the medium in the main liquid discharge pipe flows back to the recovery tank by gravity. Without the traction force of a pump or other mechanical equipment, it can flow smoothly into the recovery tank.

[0023] An electric valve 4 is provided on the main liquid discharge pipe. The electric valve is electrically connected to a battery system 5. The battery system includes a battery and a power supply circuit. The battery supplies power to the electric valve through the power supply circuit to control the opening and closing of the electric valve.

[0024] When the solar collector system is operating normally or there is a power outage, the battery system continuously supplies power to the electric valve, so that the medium in the main liquid discharge pipe flows into the recovery tank in time. The system discharges the medium in the collector through the sewage discharge port and the liquid discharge pipeline, preventing equipment damage caused by freezing of the internal medium. The liquid discharge pipeline can quickly and effectively empty the internal medium, ensuring the overheat protection function of the solar collector.

[0025] The bottom of the recovery tank is provided with a water outlet, and a liquid supplement pipeline 7 is connected to the water outlet. The end of the liquid supplement pipeline is connected to a circulation pump 103 that drives the heat exchange cycle in the solar collector. The liquid supplement pipeline is connected to the liquid supplement port of the circulation pump, and a liquid supplement pump 701 is provided on the liquid supplement pipeline. The medium is collected by the recovery tank. When the system of the solar collector restarts, the liquid supplement pump and the circulation pump are turned on, and the medium collected in the recovery tank is sucked by the liquid supplement pump and the circulation pump and then replenished into the solar collector for recycling.

[0026] During the operation of the entire system, an exhaust valve 101 for exhausting or supplementing air in the system is provided at the high end of the solar collector or the drain pipeline. The exhaust valve effectively exhausts the air in the system or is used to supplement the gas in the system to ensure normal liquid circulation; it keeps the medium in the system flowing smoothly and the system running stably.

[0027] In the description of this specification, terms such as "connection", "installation", "fixation", "setting", etc. are all understood in a broad sense. For example, "connection" means fixed connection or indirect connection through an intermediate component without affecting the relationship between components and technical effects, and it can also be integral connection or partial connection. In the case of this example, for those of ordinary skill in the art, the specific meanings of the above terms in this utility model or the invention can be understood according to specific circumstances. As described above, the above is only the preferred specific implementation mode of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by this utility model, according to the technical solution of this utility model and its inventive concept, makes equivalent replacements or changes, and all should be covered by the protection scope of this utility model.

Claims

1. A roof distributed solar energy anti-freezing and anti-overheating system, characterized in that: It includes several solar collectors (1) laid on the roof or at a high place. A sewage discharge port (102) connected to the internal flow channel of the flat solar collector is provided at the bottom of the solar collector. A liquid discharge pipeline (2) connected to the sewage discharge port is provided below the solar collector. The liquid discharge pipelines are connected in parallel and then connected to a main liquid discharge pipe (3). A recovery tank (6) is provided at the end of the main liquid discharge pipe. An electric valve (4) is provided on the main liquid discharge pipe. The electric valve is electrically connected to a battery system (5).

2. The roof distributed solar energy anti-freezing and anti-overheating system according to claim 1, characterized in that: The main liquid discharge pipe (3) is arranged as a ramp pipeline inclined towards the recovery tank, and the medium in the main liquid discharge pipe flows back to the recovery tank by gravity.

3. The roof distributed solar energy anti-freezing and anti-overheating system according to claim 1, characterized in that: The sewage discharge port (102) is connected to the internal flow channel of the solar collector and extends outside the frame of the solar collector. The medium in the internal flow channel of the solar collector flows to the sewage discharge port and is discharged.

4. A roof distributed solar energy anti-freezing and anti-overheating system according to claim 1, characterized in that: A water outlet is provided at the bottom of the recovery tank (6). A liquid supplement pipeline (7) is connected to the water outlet. The end of the liquid supplement pipeline is connected to a circulation pump (103) that drives the heat exchange cycle in the solar collector. The liquid supplement pipeline is connected to the liquid supplement port of the circulation pump, and a liquid supplement pump (701) is provided on the liquid supplement pipeline.

5. The roof distributed solar energy anti-freezing and anti-overheating system according to claim 2, characterized in that: An exhaust valve (101) for exhausting or supplementing air to the system is provided at the high end of the solar collector or the liquid discharge pipeline.

6. The distributed solar anti-freezing and anti-overheating system for a roof according to claim 1, characterized in that: The battery system (5) includes a battery and a power supply circuit. The battery supplies power to the electric valve through the power supply circuit to control the opening and closing of the electric valve.

Images