Heat pump drying as a kind of high efficiency and energy saving products, compared with the traditional drying, energy-saving effect is remarkable, keep better drying of material drying quality, unit USES the heat recovery technology, comprehensive energy efficiency as high as 5.0. Particularly suitable for dry sensitivity and volatile products, improve the quality of the material. At the same time, the heat pump drying process using intelligent control technology, the built-in various drying process curve, a large number of saves manpower cost, save time, save work. At present, agriculture, food, chemical, ceramics, medicine, mineral processing to pulp and paper, wood processing and textile industry, such as almost all industrial production processes have dry, dry production process has become a key link to improve the quality of products, but the drying process is also a process of high energy consumption. All kinds of industrial sector in the total energy consumption in our country, drying energy consumption is 4% (chemical industry) - 35% (paper industry). Developed countries, such as the United States, France, Britain, Japan, etc. About 12% of industrial energy consumption is used for drying. The heat pump drying is a kind of gentle, close to the natural drying, suitable for most of the agricultural products, medicine and other heat-sensitive materials. So. In the field of drying technology, the application of heat pump can be effective use of energy, protect the environment, to reduce the greenhouse effect and prevent ozone depletion.