The D series of air cooler is a kind of indoor cooling equipment matching with condensing unit forall kinds of cold room,Asper different temperature,has DL,DD,DJ 3 sub series of production for different range temperature needed.DL air cooler for around 0ºC,mainly use for fresh-keep cold storage;DD for around -18ºC,mainly use for cold storage;Dj for temperature below -25ºC~-30ºC,specially use for blast freezer room.