Refrigeration circuit stops compressor if a compressor output pressure exceeds threshold in hot operating mode, restarts it if evaporator's thermal capacity falls below demand value

摘要

The arrangement has a compressor (10), a liquefier (14), pressure reducing devices (16,21a), an evaporator (18) and a hot gas bypass line (20). One of the pressure reducing devices (21a) is arranged in the hot gas bypass line. A stop device stops the compressor if a physical parameter representing the compressor output pressure exceeds a threshold level in a hot operating mode. A restart device restarts the compressor if a parameter representing the evaporator's thermal capacity falls below a demand value, indicating null capacity.