The drying process of materials in an air source heat pump dryer is quite complex, and the characteristics of each material are different. The main factors affecting efficiency are as follows:

1. The structure and rotation speed of the air source heat pump dryer;

2. The contact condition between the drying medium and the material;

3. The temperature, humidity, and flow rate of the drying medium;

4. The structure of the combustion chamber and the quality of the fuel;

5. The properties and structure of the material.