(57) A gas flow system for a hermetic compressor (10) is described which reduces the transfer
of heat from the cylinder head (54) and the hot discharge gases along with other hot
internal compressor parts, wherein a separately formed suction tube (58) is made from
a low thermal conductivity plastic and is adapted to be received in a separately formed
cylinder head (54). The cylinder head (54) includes discharge chambers (64, 65) formed
integrally therein but is adapted to receive the suction tube (58), while the suction
tube (58) includes a conduit (90) defining a suction plenum (90) having a suction
inlet (92) and adjutages (98, 99) extending transverse to the conduit (90) which extend
to the valve plate (44) and communicate with openings in the cylinder head (54) in
order that the refrigerant flowing therein bypass the hot cylinder head (54) and flows
directly into the cylinder (32, 33). The gas flow system also provides cooling for
the motor (20) in which a part of the refrigerant which flows into the suction tube
(58) is directed through the motor (20). Grooves (80, 81, 82) formed in the cylinder
head walls accommodate O-rings (84, 85, 86) that allow a press fit of the suction
tube (58) onto the cylinder head (54).
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