DISCHARGE VALVE ACTUATING SYSTEM FOR HERMETIC COMPRESSORS

摘要

PCT No. PCT/BR94/00018 Sec. 371 Date Feb. 26, 1996 Sec. 102(e) Date Feb. 26, 1996 PCT Filed May 2, 1994 PCT Pub. No. WO94/27047 PCT Pub. Date Nov. 24, 1994Discharge valve actuating system for hermetic compressors of the type having 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). There is 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). The inoperative and operative positions are defined as a function of the pressure inside the discharge chamber (2) in relation to the pressure existing in the subchamber (70) during each pumping cycle of the piston (3).