| 摘要 |
PROBLEM TO BE SOLVED: To suppress a state that temperatures of an illuminator and near it are carelessly raised while improving an illumination effect by installing the illuminator on a ceiling surface in a cold storage chamber. SOLUTION: When a door provided at a cold storage chamber having an illuminator installed on a ceiling surface is opened ('YES' in step A4), an operation of a cooling fan for the chamber for circulating cold air generated from a cooler for special purpose of the chamber is started (Step A8) when a delay time τ calculated in a delay time arithmetic routine A2 is elapsed ('YES' in step A6). When the door for the chamber is closed (('YES' in step A7 or A9), an operation of the fan is stopped (Step A10). |
