| 摘要 |
PCT No. PCT/FI84/00036 Sec. 371 Date Jan. 7, 1985 Sec. 102(e) Date Jan. 7, 1985 PCT Filed May 17, 1984 PCT Pub. No. WO84/04802 PCT Pub. Date Dec. 6, 1984.The present invention concerns a flow regulator for gaseous substances, particularly a flow regulator intended for air in air-conditioning and ventilation installations, for maintaining the volumetric flow of the gaseous substance at desired magnitude with sufficient accuracy when the differential pressure acting across the flow regulator varies within given limits. The flow regulator comprises an envelope and a regulating member turnably disposed in the flow passage confined by the envelope (11). The torque produced by the flow of gaseous substance on the regulating member and on the other hand a counter-torque dependent on the position of the regulating member cause the regulating member turning in the flow passage to assume a position of equilibrium such that the requisite pressure drop is obtained for maintaining the volumetric flow rate at predetermined magnitude. The range of operation of the flow regulator is changeable by regulating the size, dependent on the different angular positions of the regulating member, of the efective flow aperture between the regulating member and the flow passage. The effective size of the regulating member is changeble in order to change the size of the effective flow aperture. The regulating member is composed of parts placed to overlap and disposed to move so that the effective size of the regulating member is changeable. |
