| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling storage appropriately estimating outside air temperature, even in a cooling storage having a plurality of storerooms and attaining independent control over cooling operation and defrosting operation. Ž<P>SOLUTION: This cooling storage includes: a clogging detecting temperature sensor for sensing the outlet temperature of a condenser, equipped on the condenser, and determining the clogged state of a filter; a sensed temperature fetching means for fetching the temperature sensed by the clogging detecting temperature sensor at each predetermined sampling time; and an outside air temperature estimation means for estimating outside air temperature. During a defrosting operation period for one storeroom of a plurality of storerooms (time t8 to time t12), the outside air temperature estimation means determines the lowest value of the temperature fetched by the sensed temperature fetching means and estimates the outside air temperature, based on the determined lowest value. A duty factor for each predetermined period τ of a dew condensation preventing heater is determined, based on the estimated outside air temperature. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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