Patent ID: 8783059

Claim:
A refrigerating air-conditioning apparatus constructed by connecting a heat-source side unit and a load-side unit by an existing refrigerant pipeline, wherein the heat-source side unit comprises a compressor, a four-way valve that changes a direction of a flow of refrigerant discharged from the compressor, an accumulator provided in a low-pressure side main refrigerant circuit pipeline from the four-way valve to a suction side of the compressor, the accumulator having a function to separate and collect a foreign material in an existing pipeline, and a collecting container for collecting the foreign material separated by the accumulator, wherein an inlet-side refrigerant pipeline of the accumulator, which is in the low-pressure side main refrigerant circuit pipeline from the four-way valve to the suction side of the compressor, and the collecting container, are connected by a degassing pipe, and a portion where the degassing pipe is connected to the low-pressure side main refrigerant circuit pipeline has an inner diameter being throttled to have a diameter less than a diameter of front and rear portions thereof.