Patent ID: 7241121
Filing Date: 2007-07-10
Classification: F04C

Abstract:
1. A scroll fluid machine comprising: a housing; a driving shaft having an eccentric axial portion; a fixed scroll having a fixed wrap in the housing; an orbiting scroll comprising a boss around an axis and an orbiting wrap extending circumferentially from the boss; a bearing provided between the orbiting scroll and the eccentric axial portion of the driving shaft to allow the orbiting scroll to revolve around the eccentric axial portion by the driving shaft so that a gas sucked through a circumference of the housing is compressed as it moves toward a center of the orbiting scroll and discharged, a gas-guiding bore being formed axially in the orbiting scroll close to and radially outside the bearing in the boss of the orbiting scroll; and a cooling fan rotated by the driving shaft near an opening end of the gas-guiding bore, air flow generated by the cooling fan passing through the gas-guiding bore to reduce heat transfer of the compressed gas to the bearing to cool the bearing effectively.