| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an air conditioning device suppressing situations that comfort is significantly degraded and protective control is executed, by adjusting a refrigerant supply amount in an oil equalizing operation. <P>SOLUTION: This air conditioning device 1 includes: compressors 11A, 11B connected by an oil equalizing pipe 46; accumulators 27A, 27B, recirculation piping 47 for gradually supplying liquid refrigerant stored in the accumulators 27A, 27B to the compressors 11A, 11B; and a control part 53 having an oil equalization control mode 55 for keeping amounts of lubricants to a specific level or more. In the oil equalization control mode 55, motion for rotating a part of the compressors 11A, 11B with a prescribed rotational frequency Nac to sufficiently suck the liquid refrigerant, and reducing the rotational frequency of the remaining compressor so that the refrigerant supply amount by all of the compressors keeps the refrigerant supply amount before starting the oil equalizing operation, is repeated while changing the part of the compressors so that all of the compressors are operated with the prescribed rotational frequency Nac at least once. <P>COPYRIGHT: (C)2012,JPO&INPIT |
