| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a planned refrigerating cycle by controlling circulation of a refrigerant flowing to an intermediate injection circuit within a specific range. <P>SOLUTION: When an operation is started, the refrigerant flows to a refrigerant circuit R, and the refrigerant through a refrigerant flow channel 3A is returned to a second electric expansion valve 11, a secondary flow channel 4B of a cooler 4, and between rotary compression elements 1A, 1B of a compressor 1. A microcomputer 40 performs control to restrict a first electric expansion valve 6 by prescribed steps when a refrigerant discharge temperature D1 is lower than a temperature obtained by subtracting 2°C from a target discharge temperature TD during the split cycle operation. When the refrigerant discharge temperature D1 rises and becomes higher than the temperature obtained by subtracting 2°C from the target discharge temperature TD, and not higher than the temperature obtained by adding 2°C to the target discharge temperature, the microcomputer 40 keeps an opening of the first electric expansion valve 6 as it is. <P>COPYRIGHT: (C)2008,JPO&INPIT |
