Drying machine is the same movement process with the system set up to reduce the temperature of the water vapor after the return of the preparation back to the material; in the drying process, the hot airflow from the tail forward movement, and the material is in full contact with the full use of heat conduction, convection, radiation heat transfer; heat energy directly to the material, so that the material's moisture in the cylinder body is constantly being evaporated, into the mouth of the induced draft device will be a large amount of moisture, moisture flow The induced air device at the inlet will extract a large amount of moisture and wet airflow, preventing the secondary pollution caused by dust discharge; through the internal spiral stirring, sweeping and scattering, and coping, it will promote the movement of materials to complete the whole drying process; the countercurrent conduction is dehumidified to avoid the reduction of repetitive drying procedures. Dryer can be divided into industrial and civilian two kinds, industrial dryer is also called drying equipment or dryer, civilian dryer is a kind of washing machinery, generally in the washing and dehydration after, used to remove the water in the clothing and other textiles.