These are divided four different type:
Precooling: It aims Before the long-duration cooling storaged products temperature reducing.
Cold-storage: That storaged the products upper temperature of the freezing point.
Deep-Freezing: Compare the cooling system type with Cold-storage that get to chance more long-duration preserved to us.
Freeze Drying: The products firstly frozen and then they take a room which is evacuated.In this room humidification absorb sort of machine as required or completely.