Central hot water system>> Solar energy and air source heat pump hot water system combined>> solar energy combined with the air source heat pump hot water system 









 Conventional solar hot water systems generally use the central fuel (gas) or electricity as an auxiliary heating energy, and energy conditions as the market changes, the prevalence of the following problems, leading to the central hot water system solar market development will be restricted: 
 1, the oil (gas) prices continue to rise, resulting in equipment operation costs continue to rise, increasing the financial burden of the user. Meanwhile the oil (gas) combustion devices commonly found environmental protection, fire-side constraints, to be on every promotion. 
 2, as the auxiliary heating power to the climate in Guangdong, for example, annual average power consumption per ton of hot water is about 20 kWh of electricity, more expensive, the user generally difficult to accept. At the same time limited by the supply power capacity, the current solar hot water heating system as the auxiliary power electric heaters generally small, in the cold season, heating is not timely, the system often no hot water, poor customer satisfaction. 
 Nearly 2 years and more, I will be the introduction of air source heat pump hot water system to the application of solar hot water system, while automatic identification system using all-weather weather control technology, the successful realization of the ideal combination of two kinds of special equipment to resolve the above problem, opened up the application of solar energy central hot water system, a new field. The system will now be described as follows: 
 ① operation principle of solar water heating system: The system uses programmable controller, with timing, temperature, temperature cycles and other functions, its operating principle is: under the control of the programmable logic controller, solar water heating system uses timing, temperature, operating temperature , that is set on the programmer run-time (8:00-17:00) above, the temperature controller, programmed to run temperature (2 ℃ <△ t <8 ℃). At run time, according to solar radiation intensity, when the water temperature above the solar collector water temperature (8 ℃), the circulating pump up and running; circulation pump running when the temperature returned to 2 ℃, the circulating pump stops the same time, low-temperature solar water tank and the bottom of the tube into the collector under the loop and continue heating by solar radiation. So the cycle to heat the water temperature rising in the tank, the hot water reservoir tank in the insulation. 
 ② air-source heat pump hot water circulation system operating principle: According to the principle of reverse Carnot cycle, the refrigerant system through thermal expansion, the temperature is low (minus 20 ℃ or less), low temperature heat pump refrigerant into the evaporator in the evaporation absorbs the environment (air) in the heat, and then compressed by the compressor for power becomes high temperature and pressure, re-entering the loop with thermal storage tank condensing heat exchanger, the heat released in the meantime to the cold water tank. Through the cycle of heating, air-source heat pump to heat storage tank water temperature to rise to the preset temperature. 
 Hot water heating energy from the environment air heat, heat pump compressor in the heat only for handling the role, so are significant energy-saving heat pump hot water equipment. 
 ③ combined solar energy with air source heat pump hot water system operation