PROBLEM TO BE SOLVED: To provide a food maturation device that can keep temperature in an arrangement space in which food is arranged, constant over a long period.SOLUTION: An interior environment adjustment device comprises two evaporators A and B. Downstream side throttle means is located downstream of the evaporators A and B. Both the evaporator A and the evaporator B can perform normal cooling operation and evaporator temperature control operation. The evaporator temperature control operation throttles the downstream side of the evaporators with downstream side throttle means, increases refrigerant evaporation pressure in the evaporators, and increases surface temperature of the evaporators. A refrigerant is supplied to both the evaporators A and B at the same time, one of them is made to perform the normal cooling operation, the other is made to perform the evaporator temperature control operation, and frost attached to the evaporator made to perform the evaporator temperature control operation is removed while temperature in the arrangement space is kept.SELECTED DRAWING: Figure 1【課題】食物を配置する配置空間内の温度を長期に渡って一定に保つことが可能な食物熟成装置を提供する。【解決手段】２台の蒸発器Ａ、Ｂを有する。蒸発器Ａ、Ｂの下流側に下流側絞り手段がある。蒸発器Ａでも蒸発器Ｂでも通常冷却運転と、蒸発器温度制御運転を実施可能であり、蒸発器温度制御運転は、下流側絞り手段によって蒸発器の下流側を絞って蒸発器内の冷媒蒸発圧力を上昇させ、蒸発器の表面温度を上昇させるものである。蒸発器Ａ、Ｂの双方に同時に冷媒を供給し、いずか一方を通常冷却運転し、他方を蒸発器温度制御運転し、前記配置空間の温度を維持しつつ蒸発器温度制御運転を実施する側の蒸発器に付着した霜を除霜する。【選択図】図１
