The use of heat-absorbing medium inside the device (refrigerant) from the air or natural environment to collect heat, and through the heat exchanger so that cold water rapidly warming, while the discharge of cold air. Avoiding the defects that traditional solar products can not work in rainy and rainy days and nights can work normally when the outside temperature is above 1-15 degrees Celsius, so the utility model can be more efficient, energy-saving, and does not occupy the open space. The utility model has the advantages of simple installation and flexible use. Heat pump water heater is composed of a refrigeration cycle, including the host and the condenser in two parts. The host part includes evaporator, fan, compressor and expansion valve; the condenser is an incubator with condensing coil inside. The refrigerant absorbs the heat of the outside air in the evaporator, releases heat within the condensing coil by the heat pump cycle, and heats the water in the tank. Water tank insulation with closed-cell rubber sponge or polyurethane foam, and has good insulation properties. Heat pump unit dedicated equipment absorbs heat medium --- refrigerant, which liquefied state at room temperature below minus 20 degrees, therefore, it exists with the outside temperature temperature, the refrigerant absorbs the outside temperature, inside the evaporator Produce pressure and evaporate and evaporate. Through the work of the heat exchanger (heat pump), when the refrigerant is transformed from the vaporized state to the liquefied state, the objective heat is released to the storage water in the water tank. Electricity is only used to release heat, rather than used in direct heating, so little electricity, in the summer when the temperature is high, the production of a ton of hot water loss of about 5-6 kWh, the winter cold weather about 20 ~ 25 degrees electricity, the annual average does not exceed 15 degrees electricity. A wide range of sources of heat, including sunlight, rain and air. No matter the day or the night, regardless of sunny days, windy and rainy weather, snowing works as usual and weather-free works all day long all year round. Can be placed anywhere you specify, does not affect the appearance of the building, with little space, no direct light, the installation is very easy. Can be placed in the open, but also can be placed in inconspicuous corners or the basement, and can achieve unmanned operation, automatic temperature control water supply. Can be used in hotels, restaurants, factories, schools, hospitals, saunas, beauty salons, swimming pools, greenhouses, farms, laundries, homes, etc., can be used alone, can also be used separately, different heating Requirements, choose a different product range and installation design, but also free access to air-conditioning, from any angle to meet your requirements; excellent without CFC insulation, only 2% heat loss, longer time to maintain water temperature, thermal efficiency than the other Regular solar products indeed times. Free refrigerant freon, without any exhaust gas, waste water discharge, absolute environmental protection, no gas or electric tank to promote, absolutely safe. Energy-saving effect is obvious, compared with the use of fuel, gas, electricity, media, etc., can save at least 75% of operating costs, allowing you to easily recover the cost. High efficiency and energy saving: The hot water unit takes hot air with low temperature and air as heat source, and consumes only 1 / 3-1 / 4 of the electric water heater. Compared with coal, oil and gas hot water units, it can save 75% Operating costs. Environmentally-friendly and pollution-free: The system operates without any combustions and emissions and is a sustainable and environmentally friendly product. Safe and reliable operation: the whole system is running without the danger of flammable, explosive, poisoning and short circuit which may exist in the traditional water heater (fuel or gas or electric water heater). It is a safe and reliable hot water system. Long service life, low maintenance costs. Comfortable and convenient, automated, high degree of intelligence.