| 摘要 |
PURPOSE: A gas concentrator is provided which selectively separates the specific gas by applying pressure difference to the adsorbent using selective adsorptivity of an adsorbent for adsorbing a specific gas primarily. CONSTITUTION: The gas concentrator comprises an adsorption bed in which absorbent is contained; and a check valve means connected to an upper part of the adsorption bed and consisted of fitting(1) and rubber valve(2), wherein the rubber valve comprises body part(4) and rubber plate(3), the rubber plate is attached to the edge of an upper part of the body part, wherein the rubber valve is inserted into the fitting, and the fitting is connected to an upper part of the adsorption bed so as to close the check valve means if pressure in the adsorption bed is the same as or less than an external pressure and open the check valve means to obtain a specific gas enriched air by exceeding elastic force of the rubber plate if pressure in the adsorption bed is greater than the external pressure, and wherein the gas concentrator further comprises a pump means so that the gas concentrator is operated at a pressure between vacuum pressure and the atmospheric pressure by the pump means, and a gas supply means connected to the check valve means to inject the enriched gas into a target space after sucking an enriched gas produced when the check valve means is opened.
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