Patent ID: 8894395

Claim:
A compressor, comprising: a housing, a compressing portion which is provided inside the housing and which compresses a refrigerant, a rotation shaft which is connected to the compressing portion and which drives the compressing portion, a clutch unit connected to one end of the rotation shaft and which transmits or cuts off power to the rotation shaft, a boss portion provided in the housing on an axial side of the housing which is closest to the clutch unit, the boss portion including a hole into which the rotation shaft is inserted, a sealing member provided on the boss portion on an axial side of the boss portion which is closest to the compressing portion, the sealing member coming into contact with the rotation shaft and shielding the housing and the boss portion from each other, and a bearing which rotatably holds the rotation shaft with respect to the housing, the bearing including an outer ring provided on an axial end of the boss portion which is closest to the clutch unit, the outer ring being attached to the hole of the boss portion, an inner ring provided on an inner periphery of the outer ring and which abuts against an outer peripheral surface of the rotation shaft, a plurality of balls for rotatably supporting the inner ring with respect to the outer ring, provided between the outer ring and the inner ring, a first seal member provided between the outer ring and the inner ring, the first seal member being attached to an axial end surface of the bearing which is closest to the sealing member, and a second seal member provided between the outer ring and the inner ring, the second seal member being attached to an axial end surface of the bearing which is closest to the clutch unit, the second seal member being exposed to an outside of the housing, wherein the first seal member is always in non-contact with the inner ring and the second seal member is in contact with the inner ring when pressure in a space in the boss portion is lower than a predetermined value, and wherein, when pressure in the space in the boss portion is equal to or higher than the predetermined value, a portion of the second seal member closest to the inner ring tilts away from the housing and is not in contact with the inner ring.