Solar water heating system capable of preventing overheating
By using a combination of temperature-controlled three-way valve and radiator in the solar water heater system, the system's automatic anti-overheating function is realized, solving the problem of overheating of the solar water heater system and ensuring the safe and stable operation of the system.
Patent Information
- Application Number
- CN202421183794.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the case of high solar radiation or low water use of users, the solar water-heating system is prone to overheating, resulting in excessive temperature of the heat transfer medium and opening the safety valve, causing leakage of the heat transfer medium, posing hidden dangers to the system.
A solar water heater system that is anti-overheating is designed, using a temperature-controlled three-way valve and a radiator. Through the automatic switching function of the temperature-controlled three-way valve, a closed-circuit circulation for heat dissipation is set up in the heat collector to prevent the system from overheating.
In sunny weather, the temperature-controlled three-way valve can be automatically switched to prevent the system from overheating and ensure the safe and stable operation of the system.
Smart Images
Figure CN222560294U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of solar water heaters, in particular to an overheating-proof solar water heating system. Background Art
[0002] Solar collectors can convert solar energy into heat energy, which is environmentally friendly and energy-saving, and have gradually become popular. However, sunlight cannot be controlled. When the solar radiation is high or the user uses less water, the solar system will overheat, causing the water tank temperature in the water tank to be too high or the heat transfer medium temperature in the collector to be too high, causing the safety valve to open, causing the heat transfer medium to leak, and bringing hidden dangers to the system. Summary of the invention
[0003] The utility model designs an overheating-proof solar water heating system to solve the overheating problem of a flat-plate solar water heater.
[0004] The technical solution adopted by the utility model to solve the technical problems existing in the known technology is:
[0005] A solar water heating system for preventing overheating, wherein the collector outlet at the upper part of the collector is connected to the A port on the temperature-controlled three-way valve, the B port on the temperature-controlled three-way valve is connected to one end of the heat exchange coil inside the water storage tank, the other end of the heat exchange coil is connected to the collector inlet at the lower part of the collector through a water pump, the C port on the temperature-controlled three-way valve is connected to the radiator inlet on the radiator, and the radiator outlet is connected to the lower end of the water pump. The cold water inlet is located at the lower part of the water storage tank, the hot water outlet is located at the upper part of the water storage tank, the water tank temperature sensor is located in the middle part of the water storage tank, and the collector temperature sensor is located at the outlet of the collector outlet; the controller is connected to the collector temperature sensor through the collector temperature sensor connection line and is connected to the water tank temperature sensor through the water tank temperature sensor connection line, the controller is connected to the water pump through the water pump connection line, and the controller is connected to the photovoltaic panel through the photovoltaic panel connection line.
[0006] The working principle of the utility model is: the photovoltaic panel provides power to the controller and the water pump. The collector absorbs the heat of sunlight. When the temperature of the collector temperature sensor is higher than that of the water tank temperature sensor, the controller controls the water pump to circulate, and the heat transfer medium in the collector 1 passes through the A port and the B port on the temperature-controlled three-way valve, and transfers the heat in the collector to the water tank through the heat exchange coil. When the temperature of the heat transfer medium reaches the overheat protection temperature, the temperature sensing element in the temperature-controlled three-way valve expands due to heat, pushing the piston to the right, closing the A port-B port on the temperature-controlled three-way valve, and opening the A port-C port on the temperature-controlled three-way valve. The heat transfer medium in the collector passes through the A port and the C port on the temperature-controlled three-way valve and enters the radiator inlet. After the heat is dissipated by the radiator, it passes through the radiator outlet and enters the collector inlet, and forms a closed-loop heat dissipation cycle with the water pump. When the temperature of the heat transfer medium is lower than the overheat protection temperature, the temperature sensing element in the temperature-controlled three-way valve shrinks under the action of thermal expansion and contraction, and the piston moves left under the action of the spring, so that the A-C port on the temperature-controlled three-way valve is closed, and the A-B port on the temperature-controlled three-way valve is opened, and the heat in the collector is transferred to the water tank through the heat exchange coil. The advantage of the system is that in fine weather, the temperature-controlled three-way valve can be automatically switched to prevent the system from overheating. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG1 is a schematic diagram of the structure of the utility model;
[0008] In Figure 1: 1. Collector; 2. Collector temperature sensor; 3. Collector outlet; 4. Collector temperature sensor connection line; 5. Photovoltaic panel; 6. Collector inlet; 7. Temperature-controlled three-way valve; 8. Controller; 9. Photovoltaic panel connection line; 10. Water tank temperature sensor connection line; 11. Hot water outlet; 12. Water storage tank; 13. Water pump; 14. Water pump connection line; 15. Water tank temperature sensor; 16. Cold water inlet; 17. Heat exchange coil; 18. Radiator outlet; 19. Radiator; 20. Radiator inlet; 21. Expansion tank. DETAILED DESCRIPTION
[0009] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0010] In FIG1 , the collector outlet 3 at the upper part of the collector 1 is connected to the port A on the temperature-controlled three-way valve 7, the port B on the temperature-controlled three-way valve 7 is connected to one end of the heat exchange coil 17 inside the water storage tank 12, the other end of the heat exchange coil 17 is connected to the collector inlet 6 at the lower part of the collector 1 through the water pump 13, the expansion tank 21 is connected to the pipeline, the port C on the temperature-controlled three-way valve 7 is connected to the radiator inlet 20 on the radiator 19, and the radiator outlet 18 is connected to the lower end of the water pump 13. The cold water inlet 16 is located at the lower part of the water tank 12, the hot water outlet 11 is located at the upper part of the water tank 12, the water tank temperature sensor 15 is located in the middle part of the water tank 12, the collector temperature sensor 2 is located at the outlet of the collector outlet 3, the controller 8 is connected to the collector temperature sensor 2 through the collector temperature sensor connecting line 4, the controller 8 is connected to the water tank temperature sensor 15 through the water tank temperature sensor connecting line 10, the controller 8 is connected to the water pump 13 through the water pump connecting line 14, and the controller 8 is connected to the photovoltaic panel 5 through the photovoltaic panel connecting line 9.
[0011] The working principle of the utility model is as follows: as shown in FIG1 , the photovoltaic panel 5 provides power to the controller 8 and the water pump 13. The collector 1 absorbs the heat of the sun. When the temperature of the collector temperature sensor 2 is higher than that of the water tank temperature sensor 15, the controller 8 controls the water pump 13 to circulate. The heat transfer medium in the collector 1 passes through the A port and the B port on the temperature control three-way valve 7, and transfers the heat in the collector 1 to the water tank 12 through the heat exchange coil 17. When the temperature of the heat transfer medium reaches the overheat protection temperature, the temperature sensing element in the temperature control three-way valve 7 expands due to the heat, pushing the piston to the right, closing the A-B port on the temperature control three-way valve 7 and opening the A-C port on the temperature control three-way valve 7. The heat transfer medium in the collector 1 enters the radiator inlet 20 through the A and C ports on the temperature control three-way valve 7, and after the heat is dissipated by the radiator, it enters the collector inlet 6 through the radiator outlet 18 and forms a closed-loop heat dissipation cycle with the water pump 13. When the temperature of the heat transfer medium is lower than the overheat protection temperature, the temperature sensing element in the temperature control three-way valve 7 shrinks due to the effect of thermal expansion and contraction, and the piston moves to the left under the effect of the spring, closing the A-C port on the temperature control three-way valve 7 and opening the A-B port on the temperature control three-way valve 7, and transferring the heat in the collector 1 to the water storage tank 12 through the heat exchange coil 17. The advantage of the system is that in fine weather, the temperature-controlled three-way valve 7 can be switched automatically to prevent the system from overheating.
[0012] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims
1. A solar water heating system for preventing overheating, comprising: Collector (1) collector temperature sensor (2), collector outlet (3), collector temperature sensor connection line (4), photovoltaic panel (5), collector inlet (6), temperature-controlled three-way valve (7), controller (8), photovoltaic panel connection line (9), water tank temperature sensor connection line (10), hot water outlet (11), water storage tank (12), water pump (13), water pump connection line (14), water tank temperature sensor (15), cold water inlet (16), heat exchange coil (17), radiator outlet (18), radiator (19), heat dissipation The invention relates to a heat collector inlet (20); the heat collector outlet (3) at the upper part of the heat collector (1) is connected to the port A on the temperature control three-way valve (7); the port B on the temperature control three-way valve (7) is connected to one end of the heat exchange coil (17) inside the water storage tank (12); the other end of the heat exchange coil (17) is connected to the heat collector inlet (6) at the lower part of the heat collector (1) through the water pump (13); the port C on the temperature control three-way valve (7) is connected to the radiator inlet (20) on the radiator (19); and the radiator outlet (18) is connected to the lower end of the water pump (13).
2. The overheating-proof solar water heating system according to claim 1, characterized in that: The controller (8) is connected to the collector temperature sensor (2) via the collector temperature sensor connection line (4), the controller (8) is connected to the water tank temperature sensor (15) via the water tank temperature sensor connection line (10), the controller (8) is connected to the water pump (13) via the water pump connection line (14), and the controller (8) is connected to the photovoltaic panel (5) via the photovoltaic panel connection line (9).