Heat pump is a kind of high-quality hot equipment that can get low-grade heat from the air, water or soil in nature and work through electric power. It is a clean energy-saving heating and air conditioning integrated equipment, according to different sources of heat generally divided into water, ground source and air source heat pump three. As a natural phenomenon, just as water flows from low to high, the heat also tends to flow from high to low temperatures. But people can create machines that use water pumps to pump heat from low to high temperatures, just as water is raised from low to high. Therefore, the heat pump is essentially a heat lifting device. The function of the heat pump is to draw heat from the surrounding environment and transfer it to the heated object (the object with a higher temperature), which works in the same way as the refrigerator and is in accordance with Reverse Carnot cycle work. At the same time the heat pump is not the electrical energy into heat, a small amount of electrical energy is only used to enhance the hot grade, so the heat pump is not a perpetual motion machine. Heat pump at work, it consumes part of the energy itself, the energy stored in the environmental media to be tapped through the refrigerant circulation system to increase the temperature to use, and the entire heat pump device consumes only a small part of the output power, therefore, Using heat pump technology can save a lot of high-grade energy. Heat pump hot water system has the advantages of power saving, safety, fast heating, etc. In particular, its thermal efficiency of more than 300% in the current lack of energy in the world situation, the future will be the main hot water system products. Suntech's development and utilization of heat pump technology is an extension and expansion of the direct indirect use of solar energy and provides a more effective way to prevent and control thermal pollution and control the environment. Heat pump hot water system composition (pictured) Heat pump hot water system includes heat pump host and heat exchange water tank in two parts. The main part of the heat pump includes air-cooled evaporator, compressor and expansion valve; heat exchange tank is a built-in condensing coil storage tank. Refrigerant (working fluid) in the evaporation tube to absorb the heat in the ambient air by the heat pump cycle by the condensation coil in the tank to release heat and heat the water in the tank.