Water-saving and electricity-saving system for campus bathing

Abstract

The utility model discloses a water-saving and power-saving system for campus bathing. The water-saving and power-saving system comprises an electric water heater and a wash basin, the electric water heater is connected with a first cold and hot water mixing faucet through a hot water pipe and a cold water pipe. A water outlet of the first cold and hot water mixing faucet is connected with a shower through a warm water pipe. The washing basin is provided with a second cold and hot water mixing faucet connected with the electric water heater through a hot water branch pipe and a cold water branch pipe, and the water heater further comprises a heat preservation water tank and a heat exchanger located below the washing basin; a sewage inlet and a sewage outlet of the heat exchanger are respectively communicated with a sewage pipe communicated with the wash basin, a tap water inlet and a tap water outlet of the heat exchanger are respectively communicated with a water supply pipe, and the tap water outlet of the heat exchanger is communicated with a water inlet of the heat preservation water tank through the water supply pipe; a water outlet of the heat preservation water tank communicates with a water inlet of the electric water heater through a water inlet pipe. The warm water pipe is communicated with a water return port of the heat-preservation water tank through a water return pipe. The solar water heater saves water resources and electric energy.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation and environmental protection, in particular to a water-saving and electricity-saving system for bathing on a campus. Background Art

[0002] As a service complex for education and life, university campuses provide different bathing modes due to different regions and school conditions. They are mainly divided into three types: centralized large bathhouses, centralized small bathrooms in dormitory buildings, and bathrooms in student dormitories. The convenience for students gradually increases.

[0003] Bathroom facilities in student dormitories are popular because they are convenient and safe for students to use. Since most students live on campus and study and live on campus, they use a lot of water for bathing at night. However, when the water temperature does not reach the bathing temperature, the water is directly discharged from the outlet without being used, which causes a huge waste of resources. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a water-saving and electricity-saving system for bathing on campus, so as to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] A campus bathing water-saving and power-saving system comprises an electric water heater and a wash basin arranged in a dormitory bathroom; the electric water heater is connected to a first hot and cold water mixing faucet through a hot water pipe and a cold water pipe, and the water outlet of the first hot and cold water mixing faucet is connected to a shower head through a warm water pipe; a second hot and cold water mixing faucet connected to the electric water heater through a hot water branch pipe and a cold water branch pipe is arranged on the wash basin, wherein the system further comprises a PLC controller, an insulated water tank and a heat exchanger located below the wash basin and arranged in the dormitory bathroom, the PLC controller being electrically connected to the electric water heater; the sewage inlet and sewage outlet of the heat exchanger are respectively connected to the sewage pipe connected to the wash basin, the tap water inlet and tap water outlet of the heat exchanger are respectively connected to the water supply pipe, and the tap water outlet of the heat exchanger is connected to the water inlet of the insulated water tank through the water supply pipe; the water outlet of the insulated water tank is connected to the water inlet of the electric water heater through the water inlet pipe; the warm water pipe is connected to the return water outlet of the insulated water tank through the return water pipe.

[0007] Preferably, a third temperature sensor is provided on the sewage pipe, a third solenoid valve is provided on the water supply pipe, and a second liquid level gauge and a second temperature sensor are provided in the insulated water tank; the input end of the PLC controller is respectively connected to the output ends of the second liquid level gauge, the second temperature sensor and the third temperature sensor, and the output end of the PLC controller is connected to the controlled end of the third solenoid valve.

[0008] Preferably, a first liquid level gauge is provided in the electric water heater, and a pump for pumping water in the insulated water tank into the electric water heater is provided on the water inlet pipe; the input end of the PLC controller is connected to the output end of the first liquid level gauge, and the output end of the PLC controller is connected to the controlled end of the pump.

[0009] Preferably, the warm water pipe is provided with a first temperature sensor located in front of the connection point between the warm water pipe and the return water pipe, the warm water pipe is provided with a first solenoid valve located behind the connection point between the warm water pipe and the return water pipe, and the return water pipe is provided with a second solenoid valve; the input end of the PLC controller is connected to the output end of the first temperature sensor, and the output end of the PLC controller is connected to the controlled ends of the first solenoid valve and the second solenoid valve, respectively.

[0010] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0011] The utility model can recycle the heat of washing water through the heat exchanger and the insulated water tank, increase the minimum temperature of water used by the electric water heater, and thus save electric energy; through the return water pipe connected between the warm water pipe and the insulated water tank, water that does not reach the bathing temperature can be recycled, saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Among them: 1. Electric water heater, 2. Water inlet pipe, 3. Pump, 4. Hot water pipe, 5. Cold water pipe, 6. First hot and cold water mixing faucet, 7. Warm water pipe, 8. First temperature sensor, 9. First solenoid valve, 10. Shower, 11. Return pipe, 12. Second solenoid valve, 13. Insulated water tank, 14. Second temperature sensor, 15. Hot water branch pipe, 16. Cold water branch pipe, 17. Second hot and cold water mixing faucet, 18. Washbasin, 19. Sewage pipe, 20. Third temperature sensor, 21. Heat exchanger, 22. Water supply pipe, 23. Third solenoid valve. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] A campus bathing water and electricity saving system, combined with Figure 1As shown, it includes a PLC controller, an electric water heater 1 and a wash basin 18 arranged in the dormitory bathroom, wherein the electric water heater 1 is connected to a first hot and cold water mixing faucet 6 through a hot water pipe 4 and a cold water pipe 5, and the water outlet of the first hot and cold water mixing faucet 6 is connected to a shower head 10 through a warm water pipe 7; a second hot and cold water mixing faucet 17 is arranged on the wash basin 18, and the second hot and cold water mixing faucet 17 is connected to the electric water heater 1 through a hot water branch pipe 15 and a cold water branch pipe 16. Through the above connection, the electric water heater 1 provides warm water for students to bathe and wash.

[0016] A heat preservation water tank 13 and a heat exchanger 21 are also provided in the dormitory bathroom.

[0017] The heat exchanger 21 is located below the wash basin 18, and the sewage inlet and sewage outlet of the heat exchanger 21 are respectively connected to the sewage pipe 19 connected to the wash basin 18, and the tap water inlet and tap water outlet of the heat exchanger 21 are respectively connected to the water supply pipe 22. When the student washes with warm water, the warm water flows into the heat exchanger 21 through the sewage pipe 19 and exchanges heat with the tap water in the heat exchanger 21, thereby increasing the temperature of the tap water. After the heat exchange, the warm water flows into the sewage treatment system through the sewage pipe 19; at the same time, the tap water outlet of the heat exchanger 21 is connected to the water inlet of the thermal insulation water tank 13 through the water supply pipe 22, so that the tap water heated after the heat exchange flows into the thermal insulation water tank 13 for storage.

[0018] The water outlet of the insulated water tank 13 is connected to the water inlet of the electric water heater 1 through the water inlet pipe 2. A pump 3 is provided on the water inlet pipe 2. The pump 3 is used to pump the water in the insulated water tank 13 into the electric water heater 1, thereby providing the electric water heater 1 with water with a certain temperature and reducing the power consumption of the electric water heater 1.

[0019] The warm water pipe 7 is connected to the return port of the insulated water tank 13 through the return pipe 11. The warm water pipe 7 is provided with a first temperature sensor 8, which is located in front of the connection between the warm water pipe 7 and the return pipe 11. The warm water pipe 7 is provided with a first solenoid valve 9, which is located behind the connection between the warm water pipe 7 and the return pipe 11, and is used to control the connection between the warm water pipe 7 and the shower 10. The return pipe 11 is provided with a second solenoid valve 12, which is used to control the connection between the warm water pipe 7 and the insulated water tank 13. When the water temperature in the warm water pipe 7 detected by the first temperature sensor 8 does not reach the bathing temperature, the first solenoid valve 9 is closed, the second solenoid valve 12 is opened, and the warm water flows back to the thermal insulation water tank 13, thereby realizing the recovery of water that does not reach the bathing temperature and saving resources; when the water temperature in the warm water pipe 7 detected by the first temperature sensor 8 reaches the bathing temperature, the first solenoid valve 9 is opened, the second solenoid valve 12 is closed, and the warm water flows out through the shower head 10 to realize bathing.

[0020] The sewage pipe 19 is provided with a third temperature sensor 20, the water supply pipe 22 is provided with a third solenoid valve 23, and the insulated water tank 13 is provided with a second liquid level gauge and a second temperature sensor 14. When the third temperature sensor 20 detects that the sewage flowing into the sewage pipe 19 is sewage with a temperature higher than the set temperature, the third solenoid valve 23 is opened to realize the heat exchange between the tap water and the sewage; when the second liquid level gauge detects that the water in the insulated water tank 13 is at the highest liquid level, even if the high-temperature sewage flows out, the third solenoid valve 23 is not opened; when the second liquid level gauge detects that the water in the insulated water tank 13 is at the lowest liquid level and the pump 3 still needs to pump water into the electric water heater 1, the third solenoid valve 23 is opened to avoid failure to supply water to the electric water heater 1.

[0021] A first liquid level gauge is provided in the electric water heater 1. When the first liquid level gauge detects that the water in the electric water heater 1 is at the highest liquid level, the pump 3 is turned off and stops pumping water into the electric water heater 1; when the first liquid level gauge detects that the water in the electric water heater 1 is not at the highest liquid level and the electric water heater 1 is turned on, the pump 3 is turned on and pumps water into the electric water heater 1.

[0022] The PLC controller is electrically connected to the electric water heater 1; the input end of the PLC controller is respectively connected to the output ends of the first temperature sensor 8, the first liquid level gauge, the second liquid level gauge, the second temperature sensor 14 and the third temperature sensor 20; the output end of the PLC controller is respectively connected to the controlled ends of the pump 3, the first solenoid valve 9, the second solenoid valve 12 and the third solenoid valve 23, thereby realizing automatic control of the system.

[0023] When the utility model is in use, the heat of washing water can be recovered through the heat exchanger 21 and the insulated water tank 13, and the minimum temperature of water used by the electric water heater 1 can be increased, thereby saving electric energy; the return water pipe 11 connected between the warm water pipe 7 and the insulated water tank 13 can be used to recover water that does not reach the bathing temperature, thereby saving water resources.

Claims

1. A campus bathing water-saving and power-saving system, comprising an electric water heater (1) and a wash basin (18) arranged in a dormitory bathroom; the electric water heater (1) is connected to a first hot and cold water mixing faucet (6) via a hot water pipe (4) and a cold water pipe (5), and the water outlet of the first hot and cold water mixing faucet (6) is connected to a shower head (10) via a warm water pipe (7); the wash basin (18) is provided with a second hot and cold water mixing faucet (17) connected to the electric water heater (1) via a hot water branch pipe (15) and a cold water branch pipe (16), characterized in that: The invention also comprises a PLC controller, a heat preservation water tank (13) and a heat exchanger (21) located below a wash basin (18) and arranged in a dormitory bathroom. The PLC controller is electrically connected to the electric water heater (1); the sewage inlet and sewage outlet of the heat exchanger (21) are respectively connected to a sewage pipe (19) connected to the wash basin (18); the tap water inlet and tap water outlet of the heat exchanger (21) are respectively connected to a water supply pipe (22); and the tap water outlet of the heat exchanger (21) is connected to the water inlet of the heat preservation water tank (13) through the water supply pipe (22); the water outlet of the heat preservation water tank (13) is connected to the water inlet of the electric water heater (1) through the water inlet pipe (2); and the warm water pipe (7) is connected to the water return port of the heat preservation water tank (13) through the water return pipe (11).

2. The campus bathing water and electricity saving system according to claim 1 is characterized by: The sewage pipe (19) is provided with a third temperature sensor (20), the water supply pipe (22) is provided with a third solenoid valve (23), and the thermal insulation water tank (13) is provided with a second liquid level meter and a second temperature sensor (14); the input end of the PLC controller is respectively connected to the output ends of the second liquid level meter, the second temperature sensor (14) and the third temperature sensor (20), and the output end of the PLC controller is connected to the controlled end of the third solenoid valve (23).

3. The campus bathing water and electricity saving system according to claim 1 is characterized by: The electric water heater (1) is provided with a first liquid level gauge, and the water inlet pipe (2) is provided with a pump (3) for pumping water in the thermal insulation water tank (13) into the electric water heater (1); the input end of the PLC controller is connected to the output end of the first liquid level gauge, and the output end of the PLC controller is connected to the controlled end of the pump (3).

4. The campus bathing water and electricity saving system according to claim 1 is characterized by: The warm water pipe (7) is provided with a first temperature sensor (8) located in front of the connection point between the warm water pipe (7) and the return water pipe (11); the warm water pipe (7) is provided with a first solenoid valve (9) located behind the connection point between the warm water pipe (7) and the return water pipe (11); and the return water pipe (11) is provided with a second solenoid valve (12); the input end of the PLC controller is connected to the output end of the first temperature sensor (8), and the output end of the PLC controller is connected to the controlled ends of the first solenoid valve (9) and the second solenoid valve (12), respectively.

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