Large cold storage refrigeration machine and condenser and other equipment together often called refrigeration unit, refrigeration unit has a water-cooled unit and air-cooled unit points. Large cold storage to air-cooled unit for the preferred form, it has a simple, compact, easy to install, easy to operate, less ancillary equipment and other advantages, this refrigeration equipment is also easier to see.

Refrigeration unit of the refrigeration machine is the heart of the refrigeration equipment, the common compression type refrigeration machine has open, semi-closed and fully closed type. Totally enclosed compressor is small, low noise, low power consumption, high efficiency and energy saving. It is the preferred model of small cold storage, air-cooled refrigeration units composed of hermetic compressor-based, can be made into a split air conditioning like the form, hanging on the wall mounted.