| 摘要 |
PROBLEM TO BE SOLVED: To appropriately maintain a refrigeration temperature band and a low- temperature band and to freshly maintain accommodated food for a long time by providing a control means for operating a compressor and a blower based on the temperature detection means of a freezing room and a control means for switching a damper device based on the temperature detection means of a switching room. SOLUTION: The room temperature of a switching room 29 that can be switched to a freezing temperature band and the other temperature bands is detected by a switching room temperature detection means 42, and the room temperature is compared with a setting temperature by a room temperature judgment means 46. When the room temperature is higher by T1, a damper device 40 is opened by a damper device control means 47. On the other hand, when the room temperature is lower, the damper device 40 is closed. Furthermore, a heater device 44 is turned on and the temperature of the switching room 29 is preserved by the command of a heater device control means 48 while a damper device 37 is closed. In this manner, cold air is sent from a switching room ceiling duct 39 to the witching room 29 and the cold air is returned from the switching room 29 to a cooler 37 via a suction duct 41, thus maintaining the temperature of the switching room 29 at a setting temperature. |
