Patent ID: 6551081
Filing Date: 2003-04-22
Classification: F04C

Abstract:
A scroll-type compressor for a fuel cell, comprising:a fixed scroll for compression; a movable scroll for compression that defines a compression chamber, between the movable scroll for compression and the fixed scroll for compression, in which a gas sucked from the outer circumferential side is compressed by moving the gas in the direction of the inner circumference; a movable plate that has the movable scroll for compression erected on a first surface thereof and a cup-shaped cylindrical shaft insertion portion, which opens toward a second surface reverse to the first surface near the center and into which a drive shaft is inserted; a bearing that is provided inside the shaft insertion portion and supports the drive shaft with a lubricant therein; a fixed scroll for expansion provided in such a way as to oppose the second surface of the movable plate; a movable scroll for expansion that is erected on the second surface of the movable plate and defines an expansion chamber, between the movable scroll for expansion and the fixed scroll for expansion, in which the gas, that has flowed in through an inflow port formed near the center of the inner circumferential side, is expanded by moving the gas in the direction of the outer circumference; wherein the compressor also comprises, a seal means for preventing the leakage of the lubricant through the opening end of the shaft insertion portion, and an obstruction member provided between the seal means and the inflow port to prevent water, contained in the gas, from entering the bearing within the shaft insertion portion by changing the flow of the gas, containing the water, that flows in through the inflow port.