Hermetic seal construction for coolant in domestic refrigerator - features rotary piston in coolant compressor divided into three regions with different functions

摘要

A hermetic envelope (2) surrounds the compressor block (3) sealed into a main bearing (4) in which an intermediate space (5) is provided with a simple connection (6) to the gas inlet (7), from which the gas can flow directly into the cylinder space (9). This forms part of the compression space (10) which features regions (11) within the envelope (2) for evapn. of the compressed gas. The motor space (12) is sepd. from the intermediate space (5), and the motor shaft (15) is tapered (16) to guarantee circulation of oil (17) to convect heat away from the motor (13, 14) to the envelope (2), improving efficiency in comparison with open systems. ADVANTAGE - Considerable redn. of thermal stress is guaranteed with inducted gas supplied directly to compressor, and smaller heat losses from motor and seal.