Dehumidifier from compressors, heat exchangers, fans, water containers, chassis and controller. The working principle is : fans will be pumped moist air into the aircraft, through the heat exchanger, this time in the air condensing into water droplets of water become drier air from the plane, so the cycle to reduce indoor humidity. Therefore dehumidifier widely used in offices, archives, information, library, computer room, Precision instruments, hospitals and warehouses hemorrhoid valuables such a place, so that electronic products, optical instruments, sophisticated equipment and valuables to avoid the damp, mold its fate. In recent years, with people's living standard continued to improve, people's consumption concept, dehumidifier family also gradually going to become an integral part of the family one. Especially in the rainy season, they become high-grade leather garments and high-grade household electrical appliances God, to become rheumatism, respiratory disease patients and the elderly, maternal and infant health, Suitable for all users humidity create a good environment.