Air source heat pump is to use electricity, but electricity is only used in the drive heat pump system to absorb heat from the external environment. And release the heat to heat the water, instead of directly forming 860 calories of electricity to heat the water like a conventional electric water heater does. Experiments show that the same electricity used in heat pump system to absorb heat from the outside world is four times the calories of 860 kcal, so the electricity consumption is only one-fourth of the electric water heater. Playing a popular analogy: heat pump unit with 1 electric energy can draw 2-3 free heat from the environment, and then use these heat to heat water, consumption of 1 electric energy is also used to heat hot water. So eventually the thermal efficiency can reach 300-500%. (One person from the development zone to pick up the burden to the urban area up to 100 kilograms .How he did a lot of work, with how much force, there is a can measure the quantitative and value.Also use so much effort to promote a car, With the car this device, can be 400 kg of goods with the same so much work, the same force so pushed to the urban area. So with the car of this device, the effect of generating 4 times the load effect. So the heat pump This kind of equipment is similar to the car, and ordinary electric, gas water heater is similar to a person pick a burden.) We can understand why the heat pump product is a energy-efficient products. The general heating method is to directly use energy to heat water, electric water heater energy efficiency of about 95%, natural gas is about 70%, while the heat pump unit is driven by electricity to compressors, rather than directly for heating water, heat Actual from the environment. Using the energy transfer characteristics of the refrigerant, the refrigerant circulates under the action of the compressor, is continuously evaporated in the evaporator to absorb the heat energy in the air, and at the same time, heat is continuously released in the condenser to flow through Condenser cold water temperature. Since the entire system only needs to rotate the compressor to promote the circulation of the refrigerant, the amount of electricity required for cooling is reduced to the maximum extent, achieving the goal of high efficiency and energy saving. Heat pump water heater is the second generation of hot water heater after gas water heater, electric water heater and solar water heater. It is an alternative to the boiler heating equipment. Heat pump hot water machine to absorb heat in the air, take full advantage of the free energy, it is the perfect combination of electric water heaters and solar water heaters their own advantages of energy-saving environmentally friendly water heater. Heat pump water heater is one of the best equipment to use new energy sources, 365 days a year around the clock, not adverse weather. The same calorific value, heat pump water heater electricity consumption is only about a quarter of the water heater, greatly saving power. Heat pump hot water machine is advanced recommended by the developed countries green products, has been very popular in developed countries. Heat pump water heater installation is simple, small footprint, the roof can not be installed solar water heaters users are particularly suitable, the system automatically controls, without special care; and not subject to the weather, so widely used in factories, schools, hotels, restaurants, Hospitals, sauna foot bath, bathing center and other hot places larger demand.