Patent ID: 8864477
Filing Date: 2014-10-21
Classification: A61M,F04B

Abstract:
1. An oxygen concentrator provided with a compressor that generates compressed air by compressing raw air, and an adsorption member that holds an adsorbent that adsorbs nitrogen from the compressed air, wherein the compressor has: a case section; a driving motor that is provided in the case section and that has an output shaft; a head section operated by rotation of the output shaft of the driving motor and that sucks and compresses the raw air to generate thereby the compressed air; and a raw air intake section formed of a plurality of raw air intake holes for taking the raw air into the case section and supplying the raw air to the head section; the raw air intake holes of the raw air intake section are arrayed along a circumference centered around a rotation center axis of the output shaft, and the raw air intake holes are covered by a cylindrical hood member; and wherein each of the raw air intake holes has a first hole section, a second hole section and a tapered section along in the direction of a flow path of introducing the raw air, an inner diameter of the first hole section is set to be greater than an inner diameter of the second hole section, the tapered section is formed between the first hole section and the second hole section.