| 摘要 |
<p>PCT No. PCT/DK91/00261 Sec. 371 Date Mar. 9, 1993 Sec. 102(e) Date Mar. 9, 1993 PCT Filed Sep. 10, 1991 PCT Pub. No. WO92/04667 PCT Pub. Date Mar. 19, 1992.The invention is directed to a flow controlling device for a discharge system, such as a drainage system, having a first vortex chamber with an inlet and an outlet and a second bigger vortex chamber with a peripheral inlet and a central outlet axial in relation to a vortex in the second chamber. The second vortex chamber is connected at its inlet to the outlet of the first vortex chamber. The first vortex chamber is symmetrical with respect to a median plane perpendicular to a vortex axis (A), the direction of both the inlet and the outlet of this chamber being parallel with the median plane. The first vortex chamber is asymmetric with respect to a plane parallel with the inlet direction and perpendicular to the median plane. The vortex axis (A) of the first vortex chamber being perpendicular to a tangent of the second vortex chamber at the peripheral inlet and the ratio between the diameters of the first vortex chamber and the second vortex chamber is less than 0.43:1.</p> |
