RICH INTERNATIONAL TRADE CO .,LTD

Field of the PSA nitrogen generator
Accordingly, the present invention is directed to a portable PSA nitrogen generator that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a portable PSA nitrogen generator which can control the concentration of oxygen generated by an oxygen generator very easily.
Another object of the invention is to provide a portable PSA oxygen generator which can clean the polluted air and supply it indoors.
The present invention relates to a portable pressure swing adsorption ( PSA) oxygen generator and, more particularly, to a portableVPSA oxygen generator which enables a patient at home to adjust the concentration of oxygen, utilizing for a therapeutic use.
To achieve these and other advantages and in accordance with the purpose of the present Nitrogen generator for coal mine, as embodied and broadly described, a portable nitrogen generator of the invention includes: first and second filters for filtering inside air; a fan motor for passing through the air; a third filter for filtering the air intaken through the fan motor; a compressor assembly for compressing the air supplied; an oxygen concentrator for adding/eliminating oxygen to/from the compressed air supplied from the compressor assembly to generate the highly concentrated oxygen; an oxygen tank for storing the oxygen generated in the oxygen concentrator; an oxygen filter for filtering oxygen exhausted; a nitrogen filter for filtering and exhausting nitrogen; a pressure sensor installed inside the oxygen tank and outputting a signal indicating an internal pressure state; a failure alarming circuit made of buzzer connected with the pressure sensor in series, and a light emitting diode; a timer for limiting an operation time; an oxygen sensor for estimating the concentration of the PSA nitrogen generator  exhausted through the oxygen filter; a control knob for controlling the concentration of the oxygen; a micro computer connected with the timer, the oxygen sensor and the control knob; and a driving circuit for switching with a signal generated in the micro computer and outputting a control signal to the fan motor which absorbs air.