The working principle is that the fan draws humid air into the machine, and through the heat exchanger, the water molecules in the air condense into water droplets. The treated dry air is discharged from the machine, and this cycle keeps the indoor humidity at an appropriate relative humidity.

Dehumidifiers, also known as dehumidifiers, dryers, and dehumidifiers, can generally be divided into two categories: civilian dehumidifiers and industrial dehumidifiers, and belong to a part of air-conditioned households. Typically, a conventional dehumidifier consists of a compressor, heat exchanger, fan, water container, casing, and controller.