| 摘要 |
PURPOSE:To rapidly regulate the permeability of a fluid permeable membrane by exerting an ultrasonic wave on the fluid permeable membrane. CONSTITUTION:When oxygen is selectively permeated through an oxygen permeable membrane 1, for example, air is sent through a pipe 2, the oxygen concn. is measured by an oxygen sensor 4, the result is compared with a set oxygen concn. by a controller 5, and an ultrasonic wave having specified intensity and frequency is exerted on the oxygen permeable membrane 1 from an ultrasonic oscillator 3 based on the result to regulate the oxygen permeability. When an ultrasonic wave is exerted on the fluid permeable membrane in this way, the molecule constituting the fluid permeable membrane is excited, hence the molecular motion is increased, the intermolecular distance is increased, the diameter of the micropore of the fluid permeable membrane is also increased, consequently the diameter of the micropore can be controlled by the wavelength and intensity of the ultrasonic wave, and the fluid permeability can be controlled. |
