| 摘要 |
To provide a gas concentrator for simplifying an adsorption bed including adsorbent as well as surrounding devices of the gas concentrator to construct the gas concentrator through simple connection of pump means and valve control means, improve assembling efficiency and lower cost of the gas concentrator. In a gas concentrator for separating the specific gas from a mixed gas by applying pressure difference to an adsorbent having a selective adsorptivity for a specific gas, the gas concentrator comprises: two or more adsorption beds(1,1',1") in which the adsorbent is contained; a vacuum pump means(2) for applying vacuum pressure to the adsorption beds; a filter(3) for filtering impurities of the mixed gas; a gas ejector(9) for ejecting a produced gas into a target space; a valve means(4) for converting channels of the adsorption beds such that the adsorption beds alternately receive pressure and vacuum pressure of the mixed gas; a single check valve(5) for flowing down the produced gas in one direction; and minute pipes(6,6',6") installed at a produced gas production part that is an upper part of each of the adsorption beds, wherein the minute pipes installed at the respective adsorption beds are connected to the single check valve, the mixed gas is flown into one of the adsorption beds through the valve means by pressure difference between the mixed gas and the vacuum pump means such that the specific gas is adsorbed onto the adsorbent, components relatively less adsorbed onto the adsorbent are sucked in through the minute pipes and the check valve by the gas ejector such that produced gas is ejected into a target space, and the other adsorption bed receives vacuum pressure by the vacuum pump means.
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