The heat pump dryer mainly consists of four parts: a fin evaporator (outdoor unit), a compressor, a fin condenser (internal unit) and an expansion valve. It allows the refrigerant to continuously evaporate (absorbing heat in the outdoor environment)→ The thermal cycle process of compression → condensation (releasing heat in the indoor drying room) → throttling → re-evaporation, thereby transferring the heat from the external low-temperature environment to the drying room, heating and drying the drying medium, and thus continuously heating the cycle drying.

When the heat pump dryer is working, like ordinary air conditioners and heat pump units, it absorbs energy in the low-temperature environmental medium in the evaporator QA: It consumes part of the energy itself, that is, the compressor power consumption QB: Condensation through the working fluid circulation system The heat is released QC in the device, QC=QA+QB, so the efficiency of the high-temperature heat pump drying unit is (QB+QC)/QB, while the heating efficiency of other heating equipment is less than 1, so the heating efficiency of the high-temperature heat pump drying unit It is much greater than the efficiency of other heating equipment. It can be seen that using a high-temperature heat pump drying unit as a drying device can save energy, while also reducing the emission of CO2 and other pollutants, achieving energy saving and emission reduction effects.