Patent ID: 6908290

Claim:
A compressor for an automotive air conditioning system comprising: a cylinder block defining a plurality of cylinders; pistons reciprocally received in said cylinder; a cylinder head comprising a first annular wall defining a mixing chamber, a second annular wall disposed about the first annular wall and spaced apart therefrom to define a suction chamber; and a discharge chamber disposed about said second annular wall, said cylinder head comprising an inlet communicating with said mixing chamber for admitting fluid thereto, said first annular wall comprising at least two openings in circumferentially spaced relationship for admitting fluid from said mixing chamber to said suction chamber; suction ports communicating between said cylinders and said suction chamber for admitting fluid from said suction chamber into said cylinders; and discharge ports communicating between said cylinders and said discharge chamber for discharging fluid from said cylinders to said discharge chamber; wherein said cylinder head includes at least one wall between said first annular wall and said second annular wall effective to block circumferential propagation of pressure pulsations through said suction chamber.