| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate a useless sense of anxiety to a user and customer while leveling demand power by raising set temperature of cooling control during a predetermined period during business, and displaying as prescribed during the period. SOLUTION: A microcomputer 57 opens a solenoid valve 21 at the time of raising discharge air temperature TDA to -3 deg.C and closes a solenoid valve 21 at the time of lowering it to -5 deg.C based on the TDA detected by a temperature sensor 63. And, in the case of closing all the valves 21, a compressor of an icing temperature refrigerator is stopped. Temperatures of commodities displayed on a shelf in a storage chamber are maintained at about 0 deg.C under the cooling control. Incidentally, the microcomputer 57 lights a solenoid valve display unit 65 in the case of opening the valve 21, and puts out the unit 65 in the case of closing it. Thus, effective operation of the valve 21 (i.e., cooling control) is notified to a user and the like. Thus, the demand power is leveled, and a sense of anxiety to the user and customer is eliminated.</p> |
