Oil amount detector, refrigeration apparatus and air conditioner

摘要

An oil holding tank (40) is communicated to the case (10c) of the compressor (10). Part of the refrigerant discharged from the compressor (10) is introduced into the oil holding tank (40) so that the lubrication oil (L) is allowed to flow out from the oil holding tank (40) and the lubrication oil (L) which flows out is allowed to return to the case (10c). The presence of the lubrication oil (L) is detected from a comparison between the temperature (TK1) of the refrigerant introduced from the compressor (10) to the oil holding tank (40) and the temperature (TK2) of the lubrication oil (4) flowing out from the oil holding tank (40). On the basis of the result of the detection, it is judged whether or not the amount of the lubrication oil (L) in the case (10c) is appropriate.