| 摘要 |
<p>In a fluid mixing device calibration and complementary gases are supplied to constant flow devices ( 10,12 ). The flows through devices ( 10,12 ) are adjusted to be equal. The two gas flows are connected to switching valves ( 14,16 ), which allow the gas flows to be either vented or fed to the frequency multiplier ( 18 ). The two valves ( 14,16 ) are coupled to switch simultaneously but in opposite positions. Thus, the flow rate into the frequency multiplier ( 18 ) is constant but may be switched to comprise either calibration or complementary gas. The frequency multiplier divides the input stream into a number of equal streams which, after different time delays have been introduced, are recombined to produce a single stream of reduced concentration ripple and periodicity. The output from the frequency multiplier ( 18 ) fed to a series of chambers ( 20 - 24 ) where each chamber produces an attenuation of the concentration ripple and a time response to a change in concentration. As the attenuations of the chambers ( 20 - 24 ) are multiplicative and the time responses are additive, multiple chambers give a higher ratio of ripple attenuation to time response than does a single chamber. Better and faster production of substantially homogenized fluid mixtures is possible.</p> |
