Lowering the temperature of fruits and vegetables after harvest. (Pre-cooling) before storing in a cool room. Reduce the temperature of fruits and vegetables to low very quickly. The central temperature of fruits and vegetables. Almost reaches the desired temperature storage. Then it was stored in a cold room. The purpose is to pull heat accumulation in plants of the field (field heat) during the harvest. Reduce the rate of water discharge and reduced respiratory rate. Reduce water loss Allows for longer shelf life. And reduce the burden of cooling the storage room.