Patent ID: 6520289
Filing Date: 2003-02-18
Classification: F04B

Abstract:
An intake silencer for sealed motor-driven compressors for refrigerators and the like, comprising:a hollow body constituted by a lower element (28) in the form of a cup and by an upper element (30) in the form of a lid, of which the lower element (28) comprises a lateral inlet duct (32) and the upper element (30) comprises an upper outlet duct (34), two partition walls (46, 48-56) inside the cavity of the body dividing this cavity into two resonance chambers (88, 90) and an upper outlet chamber (96) communicating with the outlet duct (34), and an internal duct (52-54) which has a siphon-like shape and the ends of which communicate with the inlet duct (32) and with the outlet chamber (96), respectively, the internal duct having, along its extent, lateral openings (92, 94) for communication with the two resonance chambers (88, 90), characterized in that it comprises a pair of matching inserts (42, 44) of rigid moulded plastics material which are confined inside the lower element (28) of the body by the lid (30) and which together have a T-shaped configuration with a Longitudinal partition (46) which corresponds to the leg of the T and which extends in the lower element (28) dividing it into two juxtaposed resonance chambers (88-90), and with a transverse partition (48-56) corresponding to the transverse portion of the T, which separates the juxtaposed resonance chambers (88, 90) from the upper outlet chamber (96), and in that each insert (42, 44) comprises a respective upper flange (48, 56) corresponding to a respective half of the transverse partition, one (42) of the inserts comprising the longitudinal partition (46) and this longitudinal partition having a siphon-shaped half-duct (52) in the form of a recess, and the other insert (44) comprising at least one semi-tubular appendage (54) of corresponding siphon-like shape extending from the respective upper flange (56) and constituting another half-duct which, in combination with the aforesaid recess (52), completes the internal duct.