| 摘要 |
PROBLEM TO BE SOLVED: To prevent a shift in cooling temperatures at both storing chambers from being produced as much as possible when the two storing chambers are cooled to the same set temperature. SOLUTION: At a left storing chamber 3A where it is easily cooled, a cooler 17 and a cooling fan 20A are controlled for its ON and OFF. At a right storing chamber 3B where it is hardly cooled, a cooling fan 20B is controlled for its ON and OFF, thereby holding the storing chambers at each of the set temperatures. In the case that the set temperatures of both chambers A, B are same, the left storing chamber 3A reaches a lower limit temperature and only the cooler 17 is kept continuously at its ON state only for a time set in an exceeding timer at a control part, even though normally the cooler 17 (a compressor) and the cooling fan 20A should be turned OFF. Due to this fact, cold air produced at the cooler 17 is circulated by the cooling fan 20B at the right storing chamber 3B still over the lower limit temperature so as to perform a fast cooling. At the right and left storing chambers 3A, 3B, a shift in cooling temperature is prevented as much as possible. |
