Device for preventing compressor damage due to oil shortage at very low suction temperatures, particularly for vehicle refrigeration compressors

摘要

The arrangement has a branch (5) from the liquid delivery line (4) before the injection valve (6) which leads into a magnetic blocking valve (8) which is closed in the no-current state. A connecting line (9) after the evaporator (7) leading to the suction line (9) contains a choke element (10).