Patent ID: 7014435

Claim:
A scroll fluid machine comprising: a driving shaft having an eccentric portion; a housing; a stationary scroll having a stationary end plate from which an inner stationary wrap and an outer stationary wrap project, said stationary end plate being part of the housing; an orbiting scroll having an orbiting end plate from which an inner orbiting wrap and an outer orbiting wrap project, the orbiting scroll being fitted on the eccentric portion of the driving shaft and driven by the driving shaft to revolve eccentrically with respect to the stationary scroll; an inner annular partition wall mounted to the stationary end plate, said inner orbiting wrap being revolved by the driving shaft to engage with said inner stationary wrap inside the inner partition wall to form an expanding region; and an outer annular partition wall mounted to the stationary end plate, said outer orbiting wrap being revolved by the driving shaft to engage with said outer stationary wrap between the inner and outer partition walls to form a compressing region; a first outlet for discharging the first fluid in the compressing region; a second outlet for discharging the second fluid in the expanding region; a first inlet for introducing first fluid which is formed at part radially outer than the first outlet; a second inlet for introducing second fluid which is formed at part radially inner than the second outlet; and a discharge bore which is formed through the orbiting end plate so that the second fluid expanded and cooled in the expanding region flows partially through the discharge bore to a rear surface of the orbiting end plate to cool the orbiting end plate.