REFRIGERATING/AIR-CONDITIONING DEVICE

摘要

A refrigerating/air-conditioning device in which at least the followings are realized: first, foreign matters do not return to a compressor from an accumulator in piping cleaning operation, and secondly, foreign matters are recovered in a short time. A heat source side unit has an accumulator with a function of separating and recovering foreign matters in existing piping, and also has a recovery container for recovering the foreign matters separated by the accumulator. At the lower part of the accumulator is provided oil return piping for returning refrigerator oil to a compressor via a flow rate regulation means. In normal cooling/heating operation, the refrigerator oil is made to flow in the oil return piping, and in piping cleaning and foreign matter recovery operation, the flow rate regulation means is totally closed.