One or several refrigeration compressors, condensers, fans, liquid receivers, filters, oil separators and necessary auxiliary equipment are installed on a common base (or frame). Such equipment is called a compressor condenser unit. According to the use needs, users can configure corresponding throttling devices, evaporators and other accessories to form a complete refrigeration system.

The compressor condensing unit is divided into ammonia unit and Freon unit according to the different refrigerants used; According to different cooling methods, it can be divided into air cooled units and water cooled units; According to the structure type of refrigeration compressor, it can be divided into open type, semi closed type and fully closed type units, as well as piston type units and screw type units.