Patent KR-100861550-B1 (KR)
Title: Apparatus for generating concentrated gas being capable of controlling concentration of gas by using flow control valve and method of generating concentrated gas by using the same
Inventor: BAEK MIN
IPC: B01D53/047
Filed: 2008-06-10
Granted: 2008-10-02
Abstract: An improved apparatus for generating concentrated gas is provided to improve shortcomings of an oxygen or nitrogen concentrating method, operate the apparatus efficiently as compared with a conventional concentrated gas generating apparatus, selectively concentrate oxygen or nitrogen in air according to the selection of an adsorbent, and selectively control concentration and output of the concentrated gas, and an improved method for generating concentrated gas using the apparatus is provided. An apparatus for generating concentrated gas comprises: an air inlet(2) for receiving compressed air from the outside; an air compressor(4) for compressing air passing through the air inlet; an air regulator(10) for regulating pressure of compressed air passing through the air compressor; a first pressure gauge(12) connected to the air regulator to detect a pressure variation in rear of the air regulator; an actuated valve(16) for selectively controlling a flow path of compressed air passing through the air regulator; a muffler(18) for exhausting compressed air from inlets of first and second adsorption beds(20,22) to the outside via the actuated valve; an adsorption bed including the first and second adsorption beds having inlets into which compressed gas is flown to separate a specific gas from the compressed air and outlets to which gas except the specific gas is exhausted; a circulation valve(24) which selectively controls concentrated gas passing through the outlets of the first and second adsorption beds, connects the outlet of the first adsorption bed to the inlet of the second adsorption bed, and connects the outlet of the second adsorption bed to the inlet of the first adsorption bed; a flow control valve including a first flow control valve(30) for controlling the flow rate of concentrated gas passing through the outlet of the first adsorption bed to control the concentration and the inflow amount of the concentrated gas stored in the storage tank, and a second flow control valve(32) for controlling the flow rate of concentrated gas passing through the outlet of the second adsorption bed to control the concentration and the inflow amount of the concentrated gas stored in the storage tank; an actuated product valve including a first actuated product valve(34) for selectively controlling concentrated gas passing through the first flow control valve, and a second actuated product valve(36) for selectively controlling concentrated gas passing through the second flow control valve; a storage tank(44) for receiving concentrated gas passing through the actuated product valve to store the concentrated gas at a predetermined pressure; a pressure switch(46) for detecting pressure in the storage tank; and a control part(52) for receiving a detected signal from the pressure switch to produce and supply concentrated gas by controlling driving of the air compressor and valves if the storage amount of the concentrated gas in the storage tank is insufficient. Further, the actuated valve and the actuated product valve are solenoid valves.