PROBLEM TO BE SOLVED: To reduce the electric capacity of a cool air dryer as much as possible.SOLUTION: A cool air dryer includes a dry chamber 10 in which a material to be dried is stored, a chiller 1 and a plurality of reheaters 2 disposed in the dry chamber 10, a compressor 11, a condenser 12, and a receiver tank 13 disposed inside or outside the dry chamber 10, a first refrigerant passage 21 leading to each of the plurality of reheaters 2 and the condenser 12 from the compressor 11, flow rate adjustment means 20 consisting of a valve device for adjusting refrigerant supply amounts to at least one of the plurality of reheaters 2 and to the condenser 12 from the compressor 11 in multiple steps or steplessly, a second refrigerant passage 22 leading to the receiver tank 13 from each of the plurality of reheaters 2 and the condenser 12, an expansion valve 15 disposed in a third refrigerant passage 23 leading to the chiller 1 from the receiver tank 13, and a fourth refrigerant passage 24 leading to the compressor 11 from the chiller 1.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】冷風乾燥機の電気容量をできるかぎり小さくする。【解決手段】被乾燥物が収容される乾燥庫１０と、乾燥庫１０内に配置される冷却器１及び複数の再熱器２と、乾燥庫１０内又は外に配置される圧縮機１１、凝縮器１２及びレシーバタンク１３と、圧縮機１１から複数の再熱器２及び凝縮器１２のそれぞれへ通じる第一冷媒通路２１と、圧縮機１１から複数の再熱器２の少なくとも一つ及び凝縮器１２のそれぞれへの冷媒の供給量を複数段階に又は無段階に調整する弁装置からなる流量調整手段２０と、複数の再熱器２及び凝縮器１２のそれぞれからレシーバタンク１３へ通じる第二冷媒通路２２と、レシーバタンク１３から冷却器１へと通じる第三冷媒通路２３に配置される膨張弁１５と、冷却器１から圧縮機１１へと通じる第四冷媒通路２４とを備える冷風乾燥機とした。【選択図】図１
