| 摘要 |
PURPOSE:To reduce the flow rate resistance to attain a high capability and small-sized and compact flow rate detector, by swirling a fluid in the range of the cross section of a flow passage and circulating a ball in the direction vertical to the flow direction by its swirling current. CONSTITUTION:A fixed impeller 3 which is provided for swirling the fluid and is not rotated is fixed in the upstream side of a housing 1 forming a flow passage 2 by press-fitting or the like. In the downstream side of the impller 3, a ball 4 consisting of an opaque resin which is circulated in the flow passage by the swirling current of the fluid and a flow-out preventing member 5 are stored in the housing 1, and the flow-out preventing member 5 is fixed to the housing 1 by pressure or the like. The fluid is swirled in the range of the section of the flow passage, and the ball is circulated in the direction vertical to the flow direction by its swirling current to reduce the flow rate resistance, thus attaining a high-capability and small-sized and compact flow rate detector. |
