A compressor for an automotive air conditioning system includes a cylinder head
that comprises a mixing chamber, suction chamber and discharge chamber. The cylinder
head comprises a first annular wall defining a mixing chamber and a second annular
wall disposed about the first annular wall and spaced apart therefrom to define
the suction chamber that communicates with the suction ports to the cylinder chambers.
The discharge chamber is disposed about the second annular wall and communicates
with the discharge ports. Refrigerant flows through the mixing chamber in a swirling
or other turbulent pattern and into suction chamber through circumferentially spaced
openings. By providing the mixing chamber and isolating the mixing chamber from
the suction chamber, pressure pulsation resulting from opening of the suction ports
to admit refrigerant is reduced.
