| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restrain the cooling operation time from being longer and to avoid lowering of cooling efficiency and breakage of a compressor due to excessive flow of a refrigerant to an evaporator by varying the opening of an electronic expansion valve in cooling (pull-down) operation according to the load fluctuation of a storage. <P>SOLUTION: In this cooling device, the opening of the electronic expansion valve 13 is controlled based on the internal temperature of the storage 10 in the normal operation to put the storage 10 in a desired temperature state. The cooling device includes: an opening calculating part 41 for calculating a predetermined valve opening from the opening of the electronic expansion valve 13 in a preset predetermined time immediately before the end of normal operation; an information storing part 42 for previously storing the opening setting information on an opening increase related to the opening of the electronic expansion valve 13 in the normal operation; and an initial valve opening setting part 43 for setting the initial valve opening of the electronic expansion valve 13 in the cooling (pull down) operation during the period from after the defrosting of an evaporator 12 to the transition to the normal operation based on the predetermined valve opening and the opening setting information. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
