A solar-based hospital hot water supply system

Abstract

The utility model discloses a kind of hospital hot water supply systems based on solar energy, it is related to energy-saving technical field, specifically including solar energy collector and solar energy water heater of installation in hospital building roof, water inlet pipeline connected with solar energy collector water inlet end, water outlet pipeline connected with solar energy collector water outlet end, heat supply pipeline and end temperature regulator, the water outlet end of heat supply pipeline is connected with tap by end temperature regulator, and the end temperature regulator includes heat preservation casing.This hospital hot water supply system based on solar energy, by using solar energy preferentially, in the case where illumination condition is good, the dependence on electric energy and other energy can be reduced to maximum degree, so as to reduce the energy consumption of entire heat supply system;And the residual cold water in heat supply pipeline can be heated using solar energy, reduce end temperature regulator energy consumption, improve user water experience.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving technology, specifically a hospital hot water supply system based on solar energy. Background Technology

[0002] As special public service venues, hospitals require their hot water supply systems to meet high safety, high stability, high hygiene standards, and large-capacity continuous supply requirements. Traditional hospital hot water supply systems often rely on coal-fired or gas-fired boilers, or electric water heaters powered by the municipal power grid, but these systems suffer from high energy costs. To address this issue, existing technologies have proposed solar-based hospital hot water supply systems, such as using solar water heaters to absorb solar radiation to heat the medium in a water tank, and then supplying water to the end users via heat exchangers or direct circulation. However, in such systems, the heating tank and the outlet are usually connected by pipes. When the outlet is closed, the residual water in the pipes exchanges heat with the air, causing the residual water in the outlet pipes to cool down easily, affecting the user experience. Furthermore, during periods without sunshine or on cloudy or rainy days, solar water heaters cannot function properly, leading to a decrease in the reliability of the hot water supply. Therefore, this application proposes a solar-based hospital hot water supply system. Utility Model Content

[0003] This invention provides a solar-based hospital hot water supply system, which solves the problems mentioned in the background art, such as cold water in the system drainage affecting the user experience; and the solar water heater failing to work properly during periods without sunshine or on cloudy or rainy days, leading to a decrease in the reliability of the hot water supply.

[0004] This utility model provides the following technical solution: a solar-based hospital hot water supply system, comprising a solar collector and a solar water heater installed on the roof of a hospital building, an inlet pipe connected to the inlet end of the solar collector, an outlet pipe connected to the outlet end of the solar collector, a heating pipe, and a terminal thermostat. The outlet end of the heating pipe is connected to a faucet via the terminal thermostat. The terminal thermostat includes an insulation shell, a spiral tube disposed in the middle of the inner cavity of the insulation shell, and an electric heater connected to the inner wall of the insulation shell. The inlet end of the spiral tube is provided with a hot water inlet pipe connected to the outlet end of the heating pipe and a cold water inlet pipe connected to the hospital's tap water network. The outlet end of the cold water inlet pipe is provided with a fourth electric ball valve. The outlet end of the spiral tube is connected to a faucet via an outlet connecting pipe. An electric heating rod is disposed in the middle of the inner cavity of the outlet connecting pipe. A second temperature sensor and a first flow meter are disposed on one side of the outlet connecting pipe. The outlet pipe of the heating pipe is provided with a second flow meter and a third temperature sensor.

[0005] Preferably, the water inlet pipeline includes a first water inlet branch pipe, a second water inlet branch pipe, and a solar circulation pump. The first water inlet branch pipe is connected to the cold water discharge end of the solar water heater tank. The water inlet end of the second water inlet branch pipe is connected to the water outlet end of the heating pipeline. The water outlet ends of both the first and second water inlet branch pipes are connected to the water inlet end of the solar circulation pump. The water outlet end of the solar circulation pump is connected to the water inlet end of the solar collector through a connecting pipe.

[0006] Preferably, the first inlet branch pipe is equipped with a first temperature sensor and a first electric ball valve, and the first temperature sensor is located on the side of the first electric ball valve closer to the solar water heater tank; the inlet end of the second inlet branch pipe is equipped with a second electric ball valve.

[0007] Preferably, the water outlet pipeline includes a main water outlet pipe connected to the water outlet end of the solar collector, a first water outlet branch pipe connected to the hot water inlet end of the solar water heater tank, and a second water outlet branch pipe connected to one side of the water inlet end of the heating pipeline. The water inlet ends of the first water outlet branch pipe and the second water outlet branch pipe are both equipped with a fifth electric ball valve.

[0008] Preferably, one side of the inlet end of the heating pipeline is connected to the hot water outlet end of the solar water heater tank via a one-way valve, and the outlet end of the heating pipeline is equipped with a third electric ball valve, which is located on the side of the inlet end of the second inlet branch pipe near the end thermostat.

[0009] Preferably, the cold water supply end of the solar water heater is connected to the hospital's tap water network via a water supply booster pump.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This solar-powered hospital hot water supply system prioritizes the use of solar energy, minimizing reliance on electricity and other energy sources under good lighting conditions, thereby reducing the overall energy consumption of the heating system. Furthermore, it can utilize solar energy to heat residual cold water in the heating pipeline, reducing the energy consumption of the terminal thermostat and improving the user's water experience.

[0011] 2. This solar-powered hospital hot water supply system dynamically adjusts the outlet water temperature to the comfort threshold range set by hospital users through the precise control function of the terminal thermostat, significantly improving the comfort experience of the water terminal. At the same time, relying on the synergistic energy supply mechanism of solar thermal collection and electric auxiliary heating, when there is sufficient sunlight, the solar thermal collector is given priority to absorb solar energy to directly heat the hot water. By maximizing the use of renewable energy, the system's operating energy consumption is significantly reduced. When there is insufficient sunlight (such as on cloudy or rainy days), the system automatically switches to the electric energy compensation mode to ensure that the system continuously and stably outputs sufficient hot water, effectively enhancing the reliability and adaptability of the overall heating solution. Attached Figure Description

[0012] Figure 1 A structural block diagram of a solar-based hospital hot water supply system proposed in this utility model; Figure 2 This is an enlarged schematic diagram showing the connection between the end thermostat of this utility model and the hot water supply pipe and faucet. Figure 3 This is a cross-sectional schematic diagram of the end temperature controller of this utility model.

[0013] In the diagram: 1. Solar collector; 2. Solar water tank; 3. Main outlet pipe; 4. Solar circulation pump; 5. Second temperature sensor; 6. Water supply booster pump; 7. Heating pipeline; 8. Third temperature sensor; 9. Terminal thermostat; 10. First inlet branch pipe; 11. Faucet; 12. Outlet connection pipe; 13. Hot water inlet pipe; 14. Cold water inlet pipe; 15. Insulation shell; 16. Electric heater; 17. Fourth electric ball valve; 18. Spiral tube; 19. Heating rod; 20. First temperature sensor; 21. First electric ball valve; 22. Second flow meter; 23. Third electric ball valve; 24. Second inlet branch pipe; 25. Second electric ball valve; 26. Check valve; 27. First flow meter; 28. Second outlet branch pipe; 29. ​​Fifth electric ball valve; 30. First outlet branch pipe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This utility model provides an embodiment: Please refer to Figures 1-3 A solar-based hospital hot water supply system includes a solar collector 1 and a solar water heater tank 2 installed on the roof of a hospital building, an inlet pipe connected to the inlet end of the solar collector 1, an outlet pipe connected to the outlet end of the solar collector 1, a heating pipe 7, and a terminal thermostat 9. The solar collector 1 and the solar water heater tank 2 both utilize existing mature technologies, and their structure, principle, and functional characteristics are common knowledge in the field and will not be elaborated upon further in this paper.

[0016] The water inlet pipeline includes a first water inlet branch pipe 10, a second water inlet branch pipe 24, and a solar circulation pump 4. The first water inlet branch pipe 10 is connected to the cold water discharge end of the solar water collector 2. A first temperature sensor 20 and a first electric ball valve 21 are installed on the first water inlet branch pipe 10, and the first temperature sensor 20 is located on the side of the first electric ball valve 21 close to the solar water collector 2. The water inlet end of the second water inlet branch pipe 24 is connected to the water outlet end of the heating pipeline 7. A second electric ball valve 25 is installed at the water inlet end of the second water inlet branch pipe 24. The water outlet ends of both the first water inlet branch pipe 10 and the second water inlet branch pipe 24 are connected to the water inlet end of the solar circulation pump 4. The water outlet end of the solar circulation pump 4 is connected to the water inlet end of the solar collector 1 through a connecting pipe. By setting up the inlet pipe, when the first electric ball valve 21 is in the open state, the operation of the solar circulation pump 4 can pump the cold water in the solar hot water tank 2 to the solar collector 1 through the connecting pipe. The solar collector 1 uses solar energy to heat the cold water, and the temperature of the cold water flowing in the first inlet branch pipe 10 can be monitored in real time by the first temperature sensor 20. When the cold water temperature reaches the set threshold, the controller of this application can control the solar circulation pump 4 to stop working, and the water in the solar hot water tank 2 does not need to be circulated for heating. When the second electric ball valve 25 is in the open state, the water remaining in the heating pipe 7 can be pumped to the solar collector 1 under the action of the solar circulation pump 4.

[0017] The water outlet pipeline includes a main water outlet pipe 3 connected to the water outlet end of the solar collector 1, a first water outlet branch pipe 30 connected to the hot water inlet end of the solar water heater 2, and a second water outlet branch pipe 28 connected to one side of the water inlet end of the heating pipeline 7. A fifth electric ball valve 29 is installed at the water inlet end of both the first water outlet branch pipe 30 and the second water outlet branch pipe 28. One side of the water inlet end of the heating pipeline 7 is connected to the hot water outlet end of the solar water heater 2 via a one-way valve 26. A third electric ball valve 23 is installed at the water outlet end of the heating pipeline 7. A second flow meter 22 and a third temperature sensor 8 are installed on the water outlet pipe of the heating pipeline 7. The third electric ball valve 23 is located on the side of the second flow meter 22 and the third temperature sensor 8 near the end thermostat 9.

[0018] With the arrangement of the outlet pipe, when the fifth electric ball valve 29 on the first outlet branch pipe 30 is in the open state, the hot water discharged from the solar collector 1 is discharged into the solar hot water tank 2 through the main outlet pipe 3 and the first outlet branch pipe 30. The hot water in the solar hot water tank 2 can enter the heating pipe 7 under the action of water pressure in the pipe.

[0019] When the fifth electric ball valve 29 on the second outlet branch pipe 28 is in the open state, the hot water discharged from the solar collector 1 can be directly discharged into the heating pipeline 7 through the main outlet pipe 3 and the second outlet branch pipe 28.

[0020] As can be seen from the above description, when this application is used, the solar energy absorbed by the solar collector 1 can be transferred to the cold water flowing through the cold water constructed by the first inlet branch pipe 10, the connecting pipe, the outlet main pipe 3 and the first outlet branch pipe 30. The cold water is circulated and heated through heat exchange. The heated hot water is finally returned to the solar water heater tank 2 through the circulation path for storage, realizing the effective conversion and storage of solar thermal energy into hot water.

[0021] When the water temperature in the solar water heater tank 2 reaches the set threshold, the controller of the system starts the solar circulation pump 4. Using the circulation heating path formed by the second inlet branch pipe 24, connecting pipe, main outlet pipe 3, second outlet branch pipe 28 and heating pipe 7, the residual cold water in the heating pipe 7 can be pumped to the solar collector 1 for circulation heating, thereby improving the utilization efficiency of solar energy. When the third temperature sensor 8 detects that the water temperature in the heating pipe 7 has reached the set threshold, the solar circulation pump 4 stops working.

[0022] The cold water supply end of the solar water heater 2 is connected to the hospital's tap water network through the water supply booster pump 6. The system can replenish water to the solar water heater 2 using the water supply booster pump 6.

[0023] The outlet of the heating pipeline 7 is connected to the faucet 11 through the terminal thermostat 9. The terminal thermostat 9 precisely adjusts the outlet water temperature to ensure that the hot water output by the faucet 11 meets the comfort needs of hospital users.

[0024] The terminal thermostat 9 includes an insulation shell 15. In Embodiment 1 of this application, the insulation shell 15 is covered with a low thermal conductivity insulation material (such as polyurethane foam, polystyrene foam, rock wool or glass wool) on the outer layer of the structure. The low thermal conductivity of the static air in the closed pores inside the material effectively blocks the heat of the internal hot water from being dissipated to the outside through conduction, thereby improving the overall insulation performance of the shell.

[0025] An electric heater 16 is installed on the inner wall of the heat-insulating shell 15. A spiral tube 18 is installed in the middle of the inner cavity of the heat-insulating shell 15. The inlet end of the spiral tube 18 is provided with a hot water inlet pipe 13 connected to the outlet end of the heating pipe 7 and a cold water inlet pipe 14 connected to the hospital's tap water network. The outlet end of the cold water inlet pipe 14 is provided with a fourth electric ball valve 17. The third electric ball valve 23 is located on the side of the inlet end of the second inlet branch pipe 24 near the end thermostat 9. The outlet end of the spiral tube 18 is connected to the faucet 11 through the outlet connection pipe 12. A second temperature sensor 5 and a first flow meter 27 are provided on one side of the outlet connection pipe 12. An electric heating rod 19 is installed in the middle of the inner cavity of the outlet connection pipe 12.

[0026] When the faucet 11 is open, the first flow meter 27 detects the flow data. The controller of this application controls the third electric ball valve 23 to be open based on the data collected by the first flow meter 27. Furthermore, the controller dynamically adjusts the operating frequency of the electric heating rod 19 and the electric heater 16 based on the data collected by the second temperature sensor 5, heating the residual cold water in the spiral tube 18 and the outlet connection pipe 12 so that the outflowing water temperature reaches the set threshold. Hot water in the solar water heater tank 2 can enter the terminal thermostat 9 under water pressure. The controller of this application determines the hot water temperature in the heating pipe 7 based on the data collected by the third temperature sensor 8. When the hot water temperature in the heating pipe 7 is higher than the set outlet water temperature, the controller adjusts the opening angle of the fourth electric ball valve 17 based on the data collected by the second flow meter 22, controlling the amount of cold water entering the spiral tube 18. This ensures that the hot and cold water are evenly mixed in the spiral tube 18, and the discharged water temperature reaches the set threshold. When the hot water temperature in the heating pipe 7 meets the requirements, the hot water is directly discharged through the terminal thermostat 9 and the faucet 11; when the hot water temperature in the heating pipe 7 is lower than the requirements, the controller of this application dynamically adjusts the working frequency of the electric heating rod 19 and the electric heater 16 to heat the hot water so that the outlet water temperature can meet the requirements.

[0027] As described above, this application utilizes the precise control function of the terminal thermostat 9 to dynamically adjust the outlet water temperature to the comfort threshold range set by the hospital user, significantly improving the comfort experience of the water terminal. Simultaneously, relying on the synergistic energy supply mechanism of solar thermal collection and electric auxiliary heating, when there is sufficient sunlight, the solar thermal collector 1 is prioritized to absorb solar energy to directly heat the hot water, significantly reducing the system's operating energy consumption by maximizing the use of renewable energy. When there is insufficient sunlight (such as on cloudy or rainy days), the system automatically switches to the electric energy compensation mode to ensure a continuous and stable output of sufficient hot water, effectively enhancing the reliability and adaptability of the overall heating solution of this system.

[0028] All electrical components involved in this application are existing technologies. Those skilled in the art can select appropriate models of electrical components according to their needs. No restrictions or elaborations are made here. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies are connected by wires. According to the actual situation, appropriate controllers are selected to meet control requirements. For specific connections and control sequences, please refer to the description below. The electrical connections between each electrical component are completed in the order of their operation. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0029] In summary, when this solar-powered hospital hot water supply system is in use, it utilizes a cold water circulation path constructed by the first inlet branch pipe 10, connecting pipes, the main outlet pipe 3, and the first outlet branch pipe 30. When the solar circulation pump 4 is working, it can pump the cold water in the solar hot water tank 2 to the solar collector 1. The solar energy absorbed by the solar collector 1 is transferred to the cold water flowing through this path, and the cold water is circulated and heated through heat exchange. The heated hot water finally flows back to the solar hot water tank 2 through the main outlet pipe 3 and the first outlet branch pipe 30 for storage, realizing the effective conversion and storage of solar thermal energy into hot water.

[0030] When the water temperature in the solar water heater tank 2 reaches the set threshold, the controller of the system starts the solar circulation pump 4. Using the circulation heating path formed by the second inlet branch pipe 24, connecting pipe, outlet main pipe 3, second outlet branch pipe 28 and heating pipe 7, the residual cold water in the heating pipe 7 is pumped to the solar collector 1 for circulation heating, thereby improving the utilization efficiency of solar energy. When the third temperature sensor 8 detects that the water temperature in the heating pipe 7 has reached the set threshold, the solar circulation pump 4 stops working.

[0031] When the faucet 11 is open, water in the system can be discharged through the faucet 11. The first flow meter 27 detects the flow rate, and the second temperature sensor 5 detects the discharge temperature. The controller of this application opens the third electric ball valve 23 based on the data collected by the first flow meter 27. The controller dynamically adjusts the working frequency of the electric heating rod 19 and the electric heater 16 based on the data collected by the second temperature sensor 5 and the preset outlet water temperature to heat the cold water and improve water comfort. In addition, the hot water in the solar water heater tank 2 can enter the terminal thermostat 9 under the action of water pressure. The controller of this application judges the hot water temperature in the heating pipe 7 based on the data collected by the third temperature sensor 8. When the hot water temperature in the heating pipe 7 is higher than the set outlet water temperature, the controller of this application adjusts the opening angle of the fourth electric ball valve 17 based on the data collected by the second flow meter 22 to control the amount of cold water entering the spiral tube 18, so that the hot water and cold water are mixed evenly in the spiral tube 18 and the discharged water temperature reaches the set threshold. When the hot water temperature in the heating pipe 7 meets the requirements, the hot water is directly discharged through the terminal thermostat 9 and the faucet 11; when the hot water temperature in the heating pipe 7 is lower than the requirements, the controller of this application dynamically adjusts the working frequency of the electric heating rod 19 and the electric heater 16 to heat the hot water so that the outlet water temperature can meet the requirements.

[0032] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology. The materials and specifications of each component can be selected according to the requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A solar-based hospital hot water supply system, comprising a solar collector (1) and a solar water heater (2) installed on the roof of a hospital building, an inlet pipe connected to the inlet end of the solar collector (1), an outlet pipe connected to the outlet end of the solar collector (1), a heating pipe (7), and a terminal thermostat (9), characterized in that: The outlet of the heating pipeline (7) is connected to the faucet (11) via a terminal thermostat (9). The terminal thermostat (9) includes an insulation shell (15), a spiral tube (18) located in the middle of the inner cavity of the insulation shell (15), and an electric heater (16) connected to the inner wall of the insulation shell (15). The inlet of the spiral tube (18) is provided with a hot water inlet pipe (13) connected to the outlet of the heating pipeline (7) and a cold water inlet pipe (14) connected to the hospital's tap water network. The outlet end of the cold water inlet pipe (14) is equipped with a fourth electric ball valve (17). The outlet end of the spiral pipe (18) is connected to the faucet (11) through the outlet connection pipe (12). The middle of the inner cavity of the outlet connection pipe (12) is equipped with an electric heating rod (19). A second temperature sensor (5) and a first flow meter (27) are provided on one side of the outlet connection pipe (12). The outlet pipe of the heating pipeline (7) is equipped with a second flow meter (22) and a third temperature sensor (8).

2. The hospital hot water supply system based on solar energy according to claim 1, characterized in that: The water inlet pipeline includes a first water inlet branch pipe (10), a second water inlet branch pipe (24), and a solar circulation pump (4). The first water inlet branch pipe (10) is connected to the cold water discharge end of the solar water heater (2). The water inlet end of the second water inlet branch pipe (24) is connected to the water outlet end of the heating pipeline (7). The water outlet ends of both the first water inlet branch pipe (10) and the second water inlet branch pipe (24) are connected to the water inlet end of the solar circulation pump (4). The water outlet end of the solar circulation pump (4) is connected to the water inlet end of the solar collector (1) through a connecting pipe.

3. A hospital hot water supply system based on solar energy according to claim 2, characterized in that: The first water inlet branch pipe (10) is equipped with a first temperature sensor (20) and a first electric ball valve (21), and the first temperature sensor (20) is located on the side of the first electric ball valve (21) close to the solar water heater (2); the water inlet end of the second water inlet branch pipe (24) is equipped with a second electric ball valve (25).

4. A hospital hot water supply system based on solar energy according to claim 1, characterized in that: The water outlet pipeline includes a main water outlet pipe (3) connected to the water outlet end of the solar collector (1), a first water outlet branch pipe (30) connected to the hot water inlet end of the solar water heater (2), and a second water outlet branch pipe (28) connected to the water inlet end of the heating pipeline (7). The water inlet ends of the first water outlet branch pipe (30) and the second water outlet branch pipe (28) are both equipped with a fifth electric ball valve (29).

5. A hospital hot water supply system based on solar energy according to claim 2, characterized in that: The inlet end of the heating pipeline (7) is connected to the hot water outlet end of the solar water heater (2) via a one-way valve (26). The outlet end of the heating pipeline (7) is equipped with a third electric ball valve (23). The third electric ball valve (23) is located on the side of the inlet end of the second inlet branch pipe (24) near the end thermostat (9).

6. A hospital hot water supply system based on solar energy according to claim 1, characterized in that: The cold water supply end of the solar water heater (2) is connected to the hospital's tap water network via a water supply booster pump (6).

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