Abstract：

Presents the research status of condensation dehumidification devices, fixed bed dehumidifiers, desiccant wheel dehumidifiers, heat pump dehumidifiers and electrochemical dehumidification, liquid desiccant dehumidifiers, membranebased dehumidifiers and HVAC dehumidification systems. Analyses the respective principle, application range, advantages and disadvantages of these dehumidifiers. Points out the developing direction for dehumidifier devices.

Keywords:dehumidification, humidity control, dehumidifier, dehumidification principle