OXYGEN ENRICHER

PROBLEM TO BE SOLVED: To provide an oxygen enricher, securing the oxygen enrich operation time satisfying a user with the minimum capacity of a secondary battery, and restraining increase in weight of the secondary battery. SOLUTION: This oxygen enricher includes: a power supply circuit 32 for generating a DC power source by commercial power; the secondary battery 23 charged by the power supply circuit 32; an oxygen enriching means 28 for generating oxygen enriched air; a discharge port 7 for discharging the air sucked by a sucking means 25 to the outside; an air intake port 27; a first operation mode of sucking the air from the air intake port 27 through the oxygen enriching means 28 to make the oxygen enriched air, and delivering the air to the discharge port 7; a second operation mode of sucking the air from the air intake port 27 not through the oxygen enriching means 28 and delivering the air to the discharge port 7; and a power source determining means 31 for determining whether the power source is the commercial power or the secondary battery 23, wherein the operation time in the first operation mode or/and the second operation mode is made different depending on the kind of the power source. COPYRIGHT: (C)2007,JPO&INPIT