Campus composite heat pump hot water system
By introducing photovoltaic devices and air-source heat pumps into the hot water supply system for university students, combined with nighttime and daytime water storage tanks, parallel power supply, and multi-heat pump control, the problems of low energy utilization and heat loss in the hot water supply system for university students have been solved, achieving stable and efficient hot water supply and energy conservation.
Patent Information
- Application Number
- CN202423058749.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing hot water supply systems for university students have low energy utilization rates. Traditional solar water heating systems are inefficient at night or on cloudy or rainy days, failing to meet the demand for stable hot water supply. They also suffer from heat loss and high investment costs.
Design a campus composite heat pump hot water system, which adopts photovoltaic devices and air source heat pumps, combined with nighttime and daytime water storage tanks. The system is powered by a photovoltaic drive circuit and a mains drive circuit connected in parallel, and multiple air source heat pumps are controlled in parallel. The dual-tank system meets different hot water needs, and the use of the storage tank is switched by adjusting the solenoid valve through the control center.
It achieves a stable hot water supply around the clock, improves energy efficiency, reduces energy consumption and equipment investment, has additional power supply capacity, reduces carbon dioxide emissions, adapts to hot water demand in different seasons, and reduces heat loss.
Smart Images
Figure CN223580232U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a hot water supply system, in particular to a campus composite heat pump hot water system. BACKGROUND
[0002] The hot water demand is the necessity of the life of the college students. At present, the hot water supply for the college students is usually realized by the mode that the hot water is produced by the electric heating or the coal combustion in the boiler room to realize the water supply network of the college, and the energy utilization rate of the mode is low, and the mode does not meet the demand of the current energy saving and environmental protection. Compared with the traditional energy, the solar energy is a clean, pollution-free, sustainable and renewable energy, has the advantages of universality, easy availability, resource abundance and long-term inexhaustibility, and the solar energy is used to provide the hot water for the students, can reduce the building energy consumption, and relieves the energy crisis. But the hot water demand of the college is large, the traditional solar water heating system is low in efficiency under the condition of night or rainy weather, and the traditional solar water heating system cannot meet the demand of the stable hot water supply of the campus, and it is necessary to configure an auxiliary heat source, increases the investment cost, and the operation control is more complex.
[0003] In addition, the college campus has the characteristics that the hot water demand is small in the daytime and large at night, and the water use rule is fixed. The traditional campus hot water system only adopts a large water tank to store the hot water, and in order to meet the hot water supply requirement, the water temperature in the water tank needs to be maintained at the design temperature at any time. When the hot water demand is small in the daytime, the water tank dissipates heat to the surrounding environment, and unnecessary heat loss is caused.
[0004] Therefore, the applicant considers designing a campus hot water system mainly using solar energy, so that the energy saving and consumption demand is better met. CONTENT OF THE UTILITY MODEL
[0005] In view of the above technical problems of the prior art, the utility model solves the technical problems of how to provide a campus composite heat pump hot water system mainly using solar energy and more energy saving and consumption.
[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0007] The application discloses a campus compound heat pump hot water system, which comprises a photovoltaic device, a hot water device and a night water storage tank, characterized in that a daily water storage tank with a smaller storage capacity than the night water storage tank is further included, the hot water device is an air source heat pump, a power output end of the photovoltaic device is connected to a power supply interface of the air source heat pump through a photovoltaic driving circuit, a voltmeter and a first relay control switch are arranged in series in the photovoltaic driving circuit, the power supply interface of the air source heat pump is further connected to a commercial power driving circuit which is connected in parallel with the photovoltaic driving circuit, an inverter and a second relay control switch are arranged in series in the commercial power driving circuit, a power supply end of the commercial power driving circuit is connected to a commercial power grid after being connected in series with a voltage transformation box, and the voltmeter, the first relay control switch, the inverter and the second relay control switch are connected to a control center respectively; a water outlet at a lower end of the night water storage tank is connected to a water outlet pipeline through a night water outlet control valve arranged in the night water outlet pipeline, a water outlet at a lower end of the daily water storage tank is connected in parallel to the water outlet pipeline through a daily water outlet control valve arranged in a daily water outlet pipeline, a water pump is arranged in the water outlet pipeline and connected to a water inlet end of the air source heat pump, a water outlet end of the air source heat pump is connected to one end of a water return pipeline, the other end of the water return pipeline is connected to a night water return pipeline which is connected to a water return inlet at an upper end of the night water storage tank, a night water return control valve is arranged in the night water return pipeline, and the other end of the water return pipeline is further connected in parallel to a daily water return pipeline which is connected to a water return inlet at an upper end of the daily water storage tank, and a daily water return control valve is arranged in the daily water return pipeline; a water supply inlet at a lower end of the night water storage tank is connected to a water supply pipeline through a night water supply control valve arranged in a night water supply pipeline, and a water supply inlet at a lower end of the daily water storage tank is connected in parallel to the water supply pipeline through a daily water supply control valve arranged in a daily water supply pipeline; the night water outlet control valve, the daily water outlet control valve, the night water return control valve, the daily water return control valve, the night water supply control valve and the daily water supply control valve are all electromagnetic valves and are connected to the control center.
[0008] In this way, the heat pump hot water system can use the set photovoltaic device to supply power for the air source heat pump to produce heat, heat the water storage tank to obtain hot water for the dormitory, and parallelly connect the mains driving circuit and the mains power grid in the power supply part. When the photovoltaic driving circuit power is insufficient, the mains power grid can be controlled to supply power to ensure sufficient power supply to meet the hot water demand. The hot water conversion efficiency of the air source heat pump is higher than that of the traditional electric heating method, and energy consumption is more saved. At the same time, the water storage tank is provided with two different water storage capacities. When the water consumption is large at night, the water outlet, return water and water supply of the daily use water storage tank can be controlled to be closed, and the water storage tank with large water storage capacity is used to work, and the water in it is pumped to the air source heat pump for heating and supplying hot water. When the water consumption is low during the day, the water outlet, return water and water supply of the night use water storage tank can be controlled to be closed, and the water storage tank with small water storage capacity is used to work, and the water in it is pumped to the air source heat pump for heating and supplying hot water. In this way, the different hot water demands of day and night are met, and the effect of better energy saving and reducing loss is achieved.
[0009] Further, the air source heat pump includes a plurality of parallelly arranged air source heat pumps, the power supply interfaces of the air source heat pumps are respectively connected with corresponding photovoltaic driving circuits and mains driving circuits, the water inlet ends of the air source heat pumps are respectively connected with corresponding heat pump water inlet branch pipes and connected to a water outlet pipeline and the water pump, the flow meters, check valves and throttles are installed in series in the heat pump water inlet branch pipes, the water outlet ends of the air source heat pumps are respectively connected with corresponding heat pump water outlet branch pipes and connected to a water return pipeline, and the flow meters, check valves and throttles are respectively connected with the control center, and the temperature sensors are installed in the heat pump water outlet branch pipes and connected with the control center.
[0010] This is because the campus hot water demand is large, and a single air source heat pump cannot meet the hot water demand. At the same time, there is a difference in hot water volume between day use and night use. Therefore, a plurality of air source heat pumps are connected in parallel, and each air source heat pump can be independently controlled to switch the power supply and control the water inlet and outlet flow. According to the different hot water demands, part of the air source heat pumps can be controlled to work, and the water inlet flow of a single air source heat pump can be controlled after detecting the water outlet temperature to ensure that the hot water effect meets the standard. The independent control effect of each air source heat pump is better according to the demand.
[0011] Further, the night use water storage tank and the day use water storage tank are respectively provided with temperature probes connected with the control center.
[0012] In this way, the temperature in the water storage tank can be conveniently monitored to feedback control and adjust the number of heat pumps and the flow of hot water, so as to meet the hot water supply requirements.
[0013] Further, the upper end of the night water storage tank is also connected with a night water distribution pipeline and a municipal water pipe, a night water storage tank water replenishment control valve is installed on the night water distribution pipeline, and a night water storage tank liquid level meter is also installed in the night water storage tank.
[0014] In this way, the night water storage tank is replenished with water conveniently.
[0015] Further, the upper end of the day water storage tank is also connected with a day water distribution pipeline and the lower end of the night water storage tank, a day water storage tank water replenishment control valve is installed on the day water distribution pipeline, and a day water storage tank liquid level meter is also installed in the day water storage tank.
[0016] In this way, the day water storage tank is replenished with water conveniently through the night water storage tank, and no additional water replenishment pipeline is needed; meanwhile, the structure is arranged so that the excess hot water in the night water storage tank can be directly controlled to be stored in the smaller day water storage tank to avoid heat dissipation after the students go to sleep at night, and the students can be better supplied with water through the day water storage tank during the day.
[0017] Further, a booster pump is also installed in the water supply main pipeline. In this way, the water supply pressure can be better ensured.
[0018] Compared with the prior art, the utility model has following beneficial technical effects: 1, the utility model can satisfy the demand of life hot water when solar energy is sufficient, can satisfy the demand of life hot water of campus male and female dormitory when solar energy is insufficient, realizes a set of equipment to satisfy the demand of hot water in different seasons of a year, compared with prior art, equipment simplification, equipment utilization is higher, reduces municipal power grid fluctuation.2, the utility model is high in comprehensive utilization degree of solar energy, and does not need to access power grid under the condition that solar energy is sufficient and hot water demand is small, from the theoretical level, except initial investment cost, this system has no operating cost.Not only this, the system also has the ability of extra power supply for other products, thereby lightening the burden of power grid, greatly saving energy consumption, and even there is the possibility of realizing " zero energy consumption". In addition, in the use process of the system, carbon dioxide emission does not increase.3, the equipment related in the utility model has the characteristics of small volume, can be applied to outdoor environment, can satisfy the demand of personnel who work outdoors for a long time in work and life.4, the utility model can switch between direct current and alternating current, satisfies the demand of life hot water in different environments.5, the utility model sets up heat storage water tank, heat preservation water tank to switch and coordinate use in day and night, reduces the loss of heat in heat preservation water tank, utilizes more solar energy, improves the utilization rate of energy.6, the utility model sets up double water tank system, can better adapt to the hot water demand of male and female dormitory in different seasons, under the condition that solar energy is sufficient and hot water demand is small in day, can supply extra heat to constant temperature water tank.7, the relay set up in the utility model can flexibly control switching heat pump system to access photovoltaic direct current or municipal alternating current according to hot water demand.8, the control center of the utility model can set specific time to control the switch of electromagnetic valve to reach switching use between double water tanks.
[0019] In conclusion, the utility model has the advantages of better satisfying the demand of campus hot water use and saving energy and reducing consumption. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a structural schematic view of the utility model. DETAILED DESCRIPTION
[0021] The utility model will be further explained in detail in combination with specific implementation.
[0022] Specific implementation: such as Figure 1As shown, a campus composite heat pump hot water system, comprising a photovoltaic device 1, a hot water device and a night water storage tank 3, characterized in that it further comprises a daily water storage tank 4 with a smaller storage capacity than the night water storage tank 3, the hot water device is an air source heat pump 2, the power output end of the photovoltaic device 1 is connected to the power interface of the air source heat pump 2 through a photovoltaic driving circuit, a voltmeter 5 and a first relay control switch 6 are connected in series in the photovoltaic driving circuit, the power interface of the air source heat pump 2 is also connected to a mains driving circuit in parallel with the photovoltaic driving circuit, an inverter 7 and a second relay control switch 8 are connected in series in the mains driving circuit, the power end of the mains driving circuit is connected to the power grid 10 after being connected in series with a voltage transformation box 9, the voltmeter 5, the first relay control switch 6, the inverter 7 and the second relay control switch 8 are connected to a control center (not shown in the figure) respectively; a night water outlet control valve 11 is installed in the night water outlet pipe connected to a water outlet pipeline 13 after the water outlet of the lower end of the night water storage tank 3, a daily water outlet control valve 12 is installed in the daily water outlet pipe connected to the water outlet pipeline 13 in parallel after the water outlet of the lower end of the daily water storage tank 4, a water pump 14 is installed in the water outlet pipeline 13 and connected to the water inlet end of the air source heat pump 2, the water outlet end of the air source heat pump 2 is connected to one end of a water return pipeline 15, the other end of the water return pipeline 15 is connected to the upper end of the night water storage tank 3 through a night water return pipe connected to the water return inlet, a night water return control valve 16 is installed in the night water return pipe, the other end of the water return pipeline is also connected to the upper end of the daily water storage tank 4 through a daily water return pipe connected to the water return inlet, a daily water return control valve 17 is installed in the daily water return pipe; a night water supply control valve 18 is installed in the night water supply pipe connected to the water supply main pipeline 31 after the water supply inlet of the lower end of the night water storage tank 3, a daily water supply control valve 19 is installed in the daily water supply pipe connected to the water supply main pipeline 31 in parallel after the water supply inlet of the lower end of the daily water storage tank 4; the night water outlet control valve 11, the daily water outlet control valve 12, the night water return control valve 16, the daily water return control valve 17, the night water supply control valve 18 and the daily water supply control valve 19 are all solenoid valves connected to the control center.
[0023] In this way, the heat pump hot water system can use the set photovoltaic device to supply power for the air source heat pump to produce heat, heat the water storage tank to obtain hot water for the dormitory, and provide power supply in parallel with the city power driving circuit and the city power grid. When the power of the photovoltaic driving circuit is detected to be insufficient, the city power grid can be controlled to supply power to ensure that the power is sufficient to meet the hot water demand. The hot water conversion efficiency of the air source heat pump is higher than that of the traditional electric heating method, and the energy consumption is more saved. At the same time, the water storage tank is provided with two different water storage capacities. When the water consumption is large at night, the water outlet, return water and water supply of the daily use water storage tank can be controlled to be closed, and the water storage tank with large water storage capacity is used to work, and the water in it is pumped to the air source heat pump for heating and supplying hot water. When the water consumption is low during the day, the water outlet, return water and water supply of the night use water storage tank can be controlled to be closed, and the water storage tank with small water storage capacity is used to work, and the water in it is pumped to the air source heat pump for heating and supplying hot water. In this way, the different hot water demands of day and night are met, and the effect of better energy saving and consumption is achieved.
[0024] Among them, the air source heat pump 2 includes multiple parallel connections, each air source heat pump 2 power interface is respectively connected with the corresponding photovoltaic driving circuit and city power driving circuit, each air source heat pump 2 water inlet end is respectively connected with the corresponding heat pump water inlet branch pipe 20 and connected to the water outlet waterway pipe 13 and the water pump, each heat pump water inlet branch pipe 20 is connected with the flow meter 21, check valve 22 and throttle valve 23 in series, each air source heat pump 2 water outlet end is respectively connected with the corresponding heat pump water outlet branch pipe 24 and connected to the return water waterway pipe 15, the flow meter 21, check valve 22 and throttle valve 23 are respectively connected with the control center, and the temperature sensor 25 is installed in each heat pump water outlet branch pipe 24 and connected with the control center.
[0025] This is because the campus hot water demand is large, and a single air source heat pump cannot meet the hot water demand. At the same time, there is also a difference in the size of the hot water between the day and night. Therefore, multiple air source heat pumps are connected in parallel, and each can independently control the switching of the power supply and the size of the water inlet and outlet. It can be achieved according to the different control of the hot water demand of the air source heat pump, and the feedback control of the water inlet flow after detecting the water outlet temperature of the single air source heat pump to ensure that the hot water effect meets the standard. Better independent control effect of each air source heat pump according to the demand.
[0026] Among them, the night use water storage tank 3 and the daily use water storage tank 4 are respectively provided with temperature probes 26 connected with the control center.
[0027] In this way, it is convenient to monitor the temperature in the water storage tank and feedback control the number of heat pumps and the flow of hot water to meet the hot water supply requirements.
[0028] The upper end of the night water storage tank 3 is further connected with a night water distribution pipeline and a municipal water pipe, a night water storage tank water replenishment control valve 27 is installed on the night water distribution pipeline, a night water storage tank liquid level meter 28 is further installed in the night water storage tank 3, and the night water storage tank liquid level meter 28 and the night water storage tank water replenishment control valve 27 are respectively connected with the control center.
[0029] In this way, the night water storage tank is replenished with water conveniently.
[0030] The upper end of the day water storage tank 4 is further connected with a day water replenishment pipeline and the lower end of the night water storage tank 3, a day water storage tank water replenishment control valve 29 is installed on the day water distribution pipeline, and a day water storage tank liquid level meter 30 is further installed in the day water storage tank, and the day water storage tank liquid level meter 30 and the day water storage tank water replenishment control valve 29 are respectively connected with the control center.
[0031] In this way, the day water storage tank is replenished with water conveniently through the night water storage tank, without an additional water replenishment pipeline; meanwhile, the structure is arranged so that the excess hot water in the night water storage tank can be directly controlled to be stored in the smaller day water storage tank to avoid heat dissipation after the students go to sleep at night, and the students are better supplied with water through the day water storage tank during the day.
[0032] A booster pump 32 is further installed in the water supply main pipeline 31, so that the water supply pressure can be better ensured.
Claims
1. A campus-based composite heat pump water heating system, comprising a photovoltaic device, a hot water device, and a nighttime water storage tank, characterized in that, It also includes a daytime water storage tank with a smaller water capacity than the nighttime water storage tank. The hot water device is an air source heat pump. The power output terminal of the photovoltaic device is connected to the power interface of the air source heat pump through a photovoltaic drive circuit. A voltmeter and a first relay control switch are connected in series in the photovoltaic drive circuit. The power interface of the air source heat pump is also connected to a mains drive circuit in parallel with the photovoltaic drive circuit. An inverter and a second relay control switch are connected in series in the mains drive circuit. The power terminal of the mains drive circuit is connected to the mains power grid after being connected in series with a transformer box. The voltmeter, the first relay control switch, the inverter, and the second relay control switch are respectively connected to the control center. The water outlet at the lower end of the nighttime water storage tank is connected to a water outlet pipe after a nighttime water outlet control valve is installed through the nighttime water outlet pipe. The water outlet at the lower end of the daytime water storage tank is connected to a water outlet pipe in parallel after a daytime water outlet control valve is installed through the daytime water outlet pipe. A water pump is installed in the pipeline and connected to the inlet of an air source heat pump. The outlet of the air source heat pump is connected to one end of a return water pipeline. The other end of the return water pipeline is connected to a nighttime return water pipeline, which is connected to the return water inlet at the top of the nighttime water storage tank. A nighttime return water control valve is installed in the nighttime return water pipeline. The other end of the return water pipeline is also connected in parallel to a daytime return water pipeline, which is connected to the return water inlet at the top of the daytime water storage tank. A daytime return water control valve is installed in the daytime return water pipeline. The water supply outlet at the bottom of the nighttime water storage tank is connected to the main water supply pipeline via a nighttime water supply pipeline with a nighttime water supply control valve installed. The water supply outlet at the bottom of the daytime water storage tank is connected to the main water supply pipeline via a daytime water supply pipeline with a daytime water supply control valve installed. All the nighttime water outlet control valve, daytime water outlet control valve, nighttime water return control valve, daytime water return control valve, nighttime water supply control valve, and daytime water supply control valve are solenoid valves and are connected to the control center.
2. The campus composite heat pump hot water system as described in claim 1, characterized in that, The air source heat pump includes multiple units connected in parallel. The power interface of each air source heat pump is connected to a corresponding photovoltaic drive circuit and a mains drive circuit. The water inlet of each air source heat pump is connected to a corresponding heat pump inlet branch pipe and then to the water outlet pipe and the water pump. A flow meter, a check valve, and a throttle valve are installed in series in each heat pump inlet branch pipe. The water outlet of each air source heat pump is connected to a corresponding heat pump outlet branch pipe and then to the return water pipe. The flow meter, check valve, and throttle valve are connected to the control center. A temperature sensor is installed in each heat pump outlet branch pipe and connected to the control center.
3. The campus composite heat pump hot water system as described in claim 2, characterized in that, Temperature probes are installed in the nighttime water storage tank and the daytime water storage tank, respectively, and are connected to the control center.
4. The campus composite heat pump hot water system as described in claim 1, characterized in that, The upper end of the night-use water storage tank is also connected to the night-use water distribution pipe and the municipal water pipe. The night-use water distribution pipe is equipped with a night-use water storage tank replenishment control valve. The night-use water storage tank is also equipped with a night-use water storage tank level gauge. The night-use water storage tank level gauge and the night-use water storage tank replenishment control valve are respectively connected to the control center.
5. The campus composite heat pump hot water system as described in claim 4, characterized in that, The upper end of the daily water storage tank is connected to the daily water supply pipe and the lower end of the night water storage tank. The daily water distribution pipe is equipped with a daily water supply control valve. The daily water storage tank is also equipped with a daily water level gauge. The daily water level gauge and the daily water supply control valve are respectively connected to the control center.
6. The campus composite heat pump hot water system as described in claim 1, characterized in that, A booster pump is also installed in the main water supply pipeline.