Hermetic or semi-hermetic refrigeration motor compressor unit

摘要

the liquid from the condenser (34) is provided inside the engine by a drive (11) and is vaporized while cooling the engine. the resulting gas is sent through a pipe (10) with a hole (9) of the compressor economizer. at full load, the hole (9) is at a pressure higher than the inlet pressure of the compressor.a partial load, the hole (9) is at a pressure close to the intake pressure.;a piston (12) is provided on one side (12a) to the pressure in the interior of the engine, and on the other side of the suction pressure.when the two pressures tend to be equal, the piston (12) is shifted to a shoulder (16) in order to create a pressure drop in the pressure in the envelope of the engine (7), so as to maintain a pressure capable of returning the liquid from the engine. vaporateur (37) through a duct (38).;use for the return of the liquid to the evaporator reliably even in partial system.