DISCHARGE VALVE ACTUATING SYSTEM FOR HERMETIC COMPRESSORS

摘要

Discharge valve actuating system for hermetic compressors, of the type comprising: a piston (3) reciprocating inside a cylinder (2), which pumps gas to a discharge chamber (22), maintained in selective fluid communication with the cylinder (2) through a discharge orifice (12) provided on a valve plate (10) and closed by a respective reed discharge valve (40), said system comprising at least one subchamber (70), which maintains with the discharge chamber (22) a fluid communication that is constantly blocked by a movable blocking element (60), which moves between an operative position of contact with the discharge valve (40) when at a closed position and an inoperative position of spacing from said discharge valve (40), said inoperative and operative positions being defined in function of the pressure inside the discharge chamber (22) in relation to that pressure existing in the subchamber (70) during each pumping cycle of the piston (3).