| 摘要 |
PROBLEM TO BE SOLVED: To keep the internal humidity at a high level by controlling refrigeration supply to an evaporator in order to manage the internal humidity depending on the detection value of each sensor provided in the evaporator. SOLUTION: During cooling operation, a decision is made whether an internal temperature detected by an internal temperature sensor 33 has reached a set level or not. If it has reached the set level, internal humidity is calculated based on an evaporation temperature detected by an evaporation temperature sensor 31 and an internal temperature detected by the internal temperature sensor 33, a decision is made whether the internal humidity has reached a set level or not and cooling operation is interrupted if it has been reached. When the internal temperature exceeds the set level, cooling operation is resumed such that the quantity of refrigerant being circulated to the evaporator 21 of each cooling coil 5 increases from the start of cooling operation as compared with previous cooling operation. |
