An intelligent precise constant temperature control solar water heating system

Abstract

The present invention discloses an intelligent precise constant temperature control solar water heating system, which is composed of a conventional solar water heating system, a temperature sensor, a flow meter, an intelligent precise constant temperature controller and other parts. Among them, the conventional solar water heating system includes a solar collector, a heat storage tank, hot and cold water inlet and outlet pipes, a control valve and the like; the intelligent precise constant temperature controller is provided with a temperature acquisition module, a flow acquisition module, a signal processing transmitter, and a water tank liquid level signal processor; the temperature sensor and the flow meter are respectively connected to the temperature acquisition module and the flow acquisition module and transmit temperature and flow signals; the liquid level display alarm is connected to the water tank liquid level signal processor to control the water level of the water tank; the signal processing transmitter is connected to an electric three-way valve, and the valve opening is calculated according to the user-set water temperature and the measured flow and temperature to control the outlet water temperature. This system can control the outlet water temperature by dynamically adjusting the outlet water ratio of hot and cold water, and has an automatic adjustment function to accurately and quickly control the outlet water temperature.

Description

Technical Field

[0001] The invention relates to a solar energy heat utilization technology, in particular to a temperature control system of a solar water heater. Background Art

[0002] Due to the growing demand for energy by human beings, conventional energy is increasingly in short supply. For the sustainable development of the whole society, in recent years, my country has vigorously advocated the application of renewable energy combined with buildings. As a clean and pollution-free renewable energy, solar energy has the characteristics of being distributed without geographical restrictions, and the energy quality is consistent with the energy consumption demand of buildings. Solar water heaters are a mature and widely used way of utilizing solar heat. Solar water heaters are a heating device that converts solar energy into thermal energy. The collector heats water by absorbing solar radiation and supplies it indoors to meet people's hot water needs in life and production. Its main components are solar collectors and insulated water tanks. There are two main types of solar collectors: vacuum collector tubes and flat-plate vacuum collectors. Vacuum collector tube solar water heaters are currently the main ones in use.

[0003] Conventional solar water heaters cannot accurately control the outlet water temperature during use, and users need to manually adjust the opening of the three-way valve at the end according to their own situation. This method wastes water, takes a long time to adjust the water temperature, and the temperature control is not accurate. In addition, the uncertain fluctuations in water pressure and water volume during use will cause the outlet water temperature to fluctuate, affecting the comfort of use. Using an intelligent precision constant temperature control system to control the electric three-way valve, the valve opening is calculated based on the temperature flow of the hot and cold water ends, and the mixed water temperature is controlled. Applying this technology to solar water heaters can greatly save water and has broad application prospects. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent precise constant temperature control solar water heating system to solve the problem that conventional solar water heaters cannot precisely control the outlet water temperature.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An intelligent precise constant temperature control solar water heating system comprises a heat preservation water tank (5), a liquid level display alarm (6), a solar heat collecting tube (9), a sloping roof (10), a water inlet pipe (1), a first temperature sensor (2-1), a second temperature sensor (2-2), a third temperature sensor (2-3), a first flow meter (3-1) and a second flow meter (3-2), a first electric valve (4-1) and a second electric valve (4-2), an electric three-way valve (7), a water outlet pipe (8), and an intelligent precise constant temperature controller (11);

[0007] The first and second outlets of the heat preservation water tank (5) are respectively connected to the inlet and outlet of the solar heat collection tube (9), and the heat preservation water tank (5) and the solar heat collection tube (9) are both located on the outer surface of the inclined roof (10);

[0008] The third outlet of the insulated water tank (5) is connected to the liquid level display alarm (6), and the fourth and fifth outlets of the insulated water tank (5) are connected to the water inlet pipe (1) and the water outlet pipe (8) respectively;

[0009] The water inlet pipe (1) and the water outlet pipe (8) are connected via an electric three-way valve (7); a first temperature sensor (2-1) and a first flow meter (3-1) are arranged at a position of the water inlet pipe (1) close to the electric three-way valve (7); a first electric valve (4-1) is arranged at a position of the water inlet pipe (1) close to the thermal insulation water tank (5); a second temperature sensor (2-2) and a second electric valve (4-2) are arranged at a position of the water outlet pipe (8) close to the electric three-way valve (7); and a third temperature sensor (2-3) and a second flow meter (3-2) are arranged at a position of the water outlet pipe (8) close to the thermal insulation water tank (5);

[0010] The intelligent precise constant temperature controller (11) comprises a temperature acquisition module (12), a flow acquisition module (13), a signal processing transmitter (14), a water tank liquid level signal processor (15), a temperature increase control button (16), a temperature decrease control button (17), and a controller screen (18);

[0011] The temperature increase control button (16) and the temperature decrease control button (17) are located on the left side of the controller screen (18) and are connected to the signal processing transmitter (14).

[0012] The first temperature sensor (2-1) is located at the water inlet pipe to measure the water inlet temperature T1, and the third temperature sensor (2-3) is located at the water outlet pipe (8) close to the solar water heater (5) to measure the water outlet temperature T2 of the water heater; the first temperature sensor (2-1) and the third temperature sensor (2-3) are connected to a temperature acquisition module (12) in an intelligent precision thermostatic controller (11), and the water inlet temperature T1 and the water outlet temperature T2 are sent to the temperature acquisition module (12).

[0013] The first flow meter (3-1) is located at the water inlet pipe to measure the water inlet flow rate G1, and the second flow meter (3-2) is located at the water outlet pipe (8) close to the heat preservation water tank (5) to measure the water outlet flow rate G2. The first flow meter (3-1) and the second flow meter (3-2) are connected to a flow acquisition module (13) in the intelligent precision thermostatic controller (11), and the water inlet flow rate G1 and the water outlet flow rate G2 are sent to the flow acquisition module (13).

[0014] The temperature acquisition module (12) and the flow acquisition module (13) in the intelligent precision thermostatic controller (11) are connected to the signal processing transmitter (14), and the signal processing transmitter (14) is connected to the electric three-way valve (7); the signal processing transmitter (14) calculates the valve opening of the hot water end of the insulation water tank (5) through a system-given program using the water inlet temperature T1, water outlet temperature T2, water inlet flow G1, and water outlet flow G2 collected by the temperature acquisition module (12) and the flow acquisition module (13), and transmits the valve opening signal to the electric three-way valve (7); the electric three-way valve (7) is adjusted according to the valve opening calculated by the signal processing transmitter (14).

[0015] The second temperature sensor (2-2) is located at the water outlet of the water outlet pipe (8) and is connected to the temperature acquisition module (12) to measure the outlet temperature T3 of the mixed water and send the outlet temperature T3 to the temperature acquisition module (12). The outlet temperature T3 is compared with the temperature set by the user via the signal processing transmitter (14). If the outlet temperature T3 is not equal to the temperature set by the user, the signal processing transmitter (14) calculates the valve opening again and sends a signal to the electric three-way valve (7) to adjust the valve opening of the hot and cold water ends. If the outlet temperature T3 is equal to the temperature set by the user, the signal processing transmitter (14) sends a valve opening signal to the second electric valve (4-2) to discharge water.

[0016] The liquid level display alarm (6) is located at the 3 / 4 water level of the insulated water tank (5) and is connected to the water tank liquid level signal processor (15) in the intelligent precision thermostatic controller (11). It can detect the liquid level in the water tank and send a signal to the water tank liquid level signal processor (15), which then displays the liquid level information on the controller screen (18); when the liquid level in the water tank exceeds 3 / 4, the liquid level display alarm (6) sends a liquid level alarm signal to the water tank liquid level signal processor (15), and the water tank liquid level signal processor (15) is connected to the second electric valve (4-2) and sends a valve closing signal to the first electric valve (4-1) to stop water inflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an intelligent precise constant temperature control solar water heating system;

[0018] Figure 2 It is the plan view of the intelligent precise thermostat controller;

[0019] Figure 3 It is a flow chart of an intelligent precise constant temperature control solar water heating system.

[0020] The numbers in the figure are as follows: 1. Water inlet pipe, 2-1. First temperature sensor, 2-2. Second temperature sensor, 2-3. Third temperature sensor, 3-1. First flow meter, 3-2. Second flow meter, 4-1. First electric valve, 4-2. Second electric valve, 5. Insulated water tank, 6. Liquid level display alarm, 7. Electric three-way valve, 8. Water outlet pipe, 9. Solar collector tube, 10. Inclined roof, 11. Intelligent precision constant temperature controller, 12. Temperature acquisition module, 13. Flow acquisition module, 14. Signal processing transmitter, 15. Water tank liquid level signal processor, 16. Temperature increase control button, 17. Temperature decrease control button, 18. Controller screen. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] The general concept of the present invention is: an electric three-way valve is arranged at the outlet pipe and the inlet pipe of the solar water heater, and the electric three-way valve is connected to the intelligent precision thermostat, which can calculate the valve opening according to the temperature flow of the cold and hot water ends, and control the valve opening of the electric three-way valve to make the outlet water temperature reach the ideal temperature desired by the user, which is specifically described below in conjunction with the accompanying drawings. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0023] The core components of the solar water heater are the solar collector tube 9 and the insulated water tank 5 located on the inclined roof 10, and the insulated water tank 5 is connected to the water inlet pipe 1 and the water outlet pipe 8; the first electric valve 4-1, the first temperature sensor 2-1, and the first flow meter 3-1 are located on the water inlet pipe 1; the third temperature sensor 2-3 and the second flow meter 3-2 are located at the outlet pipe 8 near the insulated water tank 5, the second temperature sensor 2-2 and the second electric valve 4-2 are located at the water outlet end of the outlet pipe 8, and the second electric valve 4-2 is located after the second temperature sensor 2-2; the electric three-way valve 7 is located at the connection between the water inlet pipe 1 and the outlet pipe 8; the liquid level display alarm 6 is located at the 3 / 4 liquid level of the insulated water tank 5; the intelligent precision constant temperature controller 11 is located indoors and hung on the wall The wall includes a temperature acquisition module 12, a flow acquisition module 13, a signal processing transmitter 14, a water tank liquid level signal processor 15, a temperature increase control button 16, a temperature decrease control button 17, and a controller screen 18; the temperature acquisition module 12 and the flow acquisition module 13 are connected to the signal processing transmitter 14; the temperature acquisition module 12 is connected to the first temperature sensor 2-1, the second temperature sensor 2-2, and the third temperature sensor 2-3; the flow acquisition module 13 is connected to the first flow meter 3-1 and the second flow meter 3-2; the signal processing transmitter 14 is connected to the electric three-way valve 7 and the second electric valve 4-2; the water tank liquid level signal processor 15 is connected to the liquid level display alarm 6 and the first electric valve 4-1.

[0024] Specific implementation method 1: Combination Figure 1 Description: In the processing mode of the water tank liquid level signal processor 15, the liquid level display alarm 6 on the insulated water tank 5 sends the real-time liquid level signal to the water tank liquid level signal processor 15. After receiving the signal, the water tank liquid level signal processor 15 displays the liquid level information on the controller screen 18; when the liquid level in the water tank is less than 3 / 4, the liquid level display alarm 6 sends a water replenishment signal to the water tank liquid level signal processor 15, and the first electric valve 4-1 remains open; when the liquid level in the water tank exceeds 3 / 4, the liquid level display alarm 6 sends a liquid level alarm signal to the water tank liquid level signal processor 15, and sends a valve closing signal to the first electric valve 4-1 to stop water intake.

[0025] Specific implementation method 2: Combination Figure 1 Description: In the processing mode of the temperature acquisition module 12, the first temperature sensor 2-1, the second temperature sensor 2-2, and the third temperature sensor 2-3 respectively measure the water temperature at their respective locations, record them as the inlet water temperature T1, the outlet water temperature T2, and the outlet water temperature T3, and send the temperature data to the temperature acquisition module 12.

[0026] Specific implementation method three: Combination Figure 1 It is explained that in the processing mode of the flow collection module 13 , the first flow meter 3 - 1 and the second flow meter 3 - 2 respectively measure the flow at their respective locations, record them as the inlet flow G1 and the outlet flow G2, and send the flow data to the flow collection module 13 .

[0027] Specific implementation method four: Combination Figure 1 and Figure 2 Description: In the processing mode, the temperature acquisition module 12 and the flow acquisition module 13 respectively send the collected temperature and flow signals to the signal processing transmitter 14; the signal processing transmitter 14 calculates the valve opening of the hot and cold water ends of the electric three-way valve 7 through a given program of the system, and sends it to the electric three-way valve 7 in the form of a signal. After the electric three-way valve 7 adjusts the opening, the cold and hot water are mixed. The signal processing transmitter 14 compares the outlet water temperature T3 measured by the third temperature sensor with the user set temperature. If the outlet water temperature T3 is not equal to the user set temperature, the signal processing transmitter 14 calculates the valve opening again and sends a signal to the electric three-way valve 7 to adjust the valve opening of the hot and cold water ends; if the outlet water temperature T3 is equal to the user set temperature, the signal processing transmitter 14 sends a valve opening signal to the second electric valve 4-2 to discharge water.

[0028] Specific implementation method five: Combination Figure 1 and Figure 2 It is noted that the user can adjust the temperature by using the temperature increase control button 16 and the temperature decrease control button 17, and the temperature information is displayed on the controller screen 18. The user can adjust the water temperature according to the needs.

Claims

1. An intelligent precise constant temperature control solar water heating system, characterized by: The system comprises a heat preservation water tank (5), a liquid level display alarm (6), a solar heat collecting tube (9), a sloping roof (10), a water inlet pipe (1), a first temperature sensor (2-1), a second temperature sensor (2-2), a third temperature sensor (2-3), a first flow meter (3-1) and a second flow meter (3-2), a first electric valve (4-1) and a second electric valve (4-2), an electric three-way valve (7), a water outlet pipe (8), and an intelligent precision constant temperature controller (11); The first and second outlets of the heat preservation water tank (5) are respectively connected to the inlet and outlet of the solar heat collection tube (9), and the heat preservation water tank (5) and the solar heat collection tube (9) are both located on the outer surface of the inclined roof (10); The third outlet of the insulated water tank (5) is connected to the liquid level display alarm (6), and the fourth and fifth outlets of the insulated water tank (5) are connected to the water inlet pipe (1) and the water outlet pipe (8) respectively; The water inlet pipe (1) and the water outlet pipe (8) are connected via an electric three-way valve (7); a first temperature sensor (2-1) and a first flow meter (3-1) are arranged at a position of the water inlet pipe (1) close to the electric three-way valve (7); a first electric valve (4-1) is arranged at a position of the water inlet pipe (1) close to the thermal insulation water tank (5); a second temperature sensor (2-2) and a second electric valve (4-2) are arranged at a position of the water outlet pipe (8) close to the electric three-way valve (7); and a third temperature sensor (2-3) and a second flow meter (3-2) are arranged at a position of the water outlet pipe (8) close to the thermal insulation water tank (5); The intelligent precise constant temperature controller (11) comprises a temperature acquisition module (12), a flow acquisition module (13), a signal processing transmitter (14), a water tank liquid level signal processor (15), a temperature increase control button (16), a temperature decrease control button (17), and a controller screen (18); The temperature increase control button (16) and the temperature decrease control button (17) are located on the left side of the controller screen (18) and are connected to the signal processing transmitter (14).

2. The intelligent precise constant temperature control solar water heating system according to claim 1, characterized in that: The first temperature sensor (2-1) corresponds to the water inlet temperature T1 measured by the water inlet pipe (1), and the third temperature sensor (2-3) corresponds to the water outlet temperature T2 measured at the water outlet pipe (8) near the heat preservation water tank (5); the first temperature sensor (2-1) and the third temperature sensor (2-3) are connected to a temperature acquisition module (12) in the intelligent precision thermostatic controller (11), and the water inlet temperature T1 and the water outlet temperature T2 are sent to the temperature acquisition module (12); the first flow meter (3-1) corresponds to the water inlet flow G1 measured by the water inlet pipe (1), and the second flow meter (3-2) corresponds to the water outlet flow G2 measured at the water outlet pipe (8) near the heat preservation water tank (5); the first flow meter (3-1) and the second flow meter (3-2) are connected to a flow acquisition module (13) in the intelligent precision thermostatic controller (11), and the water inlet flow G1 and the water outlet flow G2 are sent to the flow acquisition module (13).

3. The intelligent precise constant temperature control solar water heating system according to claim 2 is characterized by: The temperature acquisition module (12) and the flow acquisition module (13) in the intelligent precision thermostatic controller (11) are connected to the signal processing transmitter (14), and the signal processing transmitter (14) is connected to the electric three-way valve (7); the signal processing transmitter (14) calculates the valve opening of the hot water end of the insulation water tank (5) through a system-given program using the water inlet temperature T1, water outlet temperature T2, water inlet flow G1, and water outlet flow G2 collected by the temperature acquisition module (12) and the flow acquisition module (13), and transmits the valve opening signal to the electric three-way valve (7); the electric three-way valve (7) is adjusted according to the valve opening calculated by the signal processing transmitter (14).

4. The intelligent precise constant temperature control solar water heating system according to claim 1, characterized in that: The second temperature sensor (2-2) is located at the water outlet of the water outlet pipe (8) and is connected to the temperature acquisition module (12). It measures the outlet temperature T3 of the mixed water and sends the outlet temperature T3 to the temperature acquisition module (12). The outlet temperature T3 is compared with the temperature set by the user via the signal processing transmitter (14). If the outlet temperature T3 is not equal to the temperature set by the user, the signal processing transmitter (14) calculates the valve opening again and sends a signal to the electric three-way valve (7) to adjust the valve opening of the hot and cold water ends. If the outlet temperature T3 is equal to the temperature set by the user, the signal processing transmitter (14) sends a valve opening signal to the second electric valve (4-2) to discharge water.

5. The intelligent precise constant temperature control solar water heating system according to claim 1 is characterized by: The liquid level display alarm (6) is located at the 3 / 4 water level of the insulated water tank (5) and is connected to the water tank liquid level signal processor (15) in the intelligent precision thermostatic controller (11). It can detect the liquid level in the water tank and send a signal to the water tank liquid level signal processor (15), which then displays the liquid level information on the controller screen (18); when the liquid level in the water tank exceeds 3 / 4, the liquid level display alarm (6) sends a liquid level alarm signal to the water tank liquid level signal processor (15), and the water tank liquid level signal processor (15) is connected to the second electric valve (4-2) and sends a valve closing signal to the first electric valve (4-1) to stop water intake; when the liquid level in the water tank is less than 3 / 4, the liquid level display alarm (6) sends a water replenishment signal to the water tank liquid level signal processor (15), and the first electric valve (4-1) remains open.

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