Patent ID: 7083400

Claim:
A suction and discharge valve arrangement for a small hermetic compressor of the type presenting a compression cylinder, which has an end closed by a valve plate, and which is supplied by a suction pipe disposed adjacent to the valve plate and substantially orthogonal to the cylinder axis, characterized in that the valve plate comprises: a discharge orifice substantially centralized in relation to an axial projection of the internal contour of the compression cylinder, at least one suction orifice, which is: internal to said axial projection of the internal contour of the compression cylinder and external to a contour of the discharge orifice, and occupying an annular sector substantially concentric to at least one of the internal contour of the compression cylinder and discharge orifice in order to maintain with the discharge orifice a certain minimum spacing and defining at least part of a suction passage, with an end opened to the inside of the compression cylinder and an opposite end opened and connected to the suction pipe, via a transition portion, which is incorporated to one of the parts defined by the suction passage and the suction pipe, and with a cross section configured to impart to the gas flow a change of direction, which allows the whole cross sectional area of the suction orifice to be fully used for gas flow passage.