Oxygen concentrator
AssigneeTeijin Pharma Limited
InventorsYuta MORISHITA, Yoshihiro MUROSHIGE
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Abstract
An oxygen concentrator is provided with a monitoring means for monitoring conditions of the flow path switching means based on the output of the pressure sensor in the product tank, and detects an abnormality of the flow path switching valve when a detected value of the pressure sensor during the adsorption step and/or desorption step falls outside a predetermined threshold range. The problem of detecting an abnormality in a flow path switching valve upstream of an oxygen concentrator from the waveform of a pressure sensor provided in a product tank is thereby addressed.
Claims9
An oxygen concentrator comprising:
- a plurality of adsorption cylinders filled with an adsorbent selectively adsorbing nitrogen over oxygen;
- a compressor for supplying pressurized air to the adsorption cylinder;
- a flow path switching valve equipped with a supply valve for supplying pressurized air to each of the adsorption cylinders and an exhaust valve for discharging exhaust gas from the adsorption cylinders to outside the system;
- a product tank for temporarily storing the oxygen generated from the adsorption cylinder;
- and
- a pressure sensor for detecting a product tank pressure;
- the oxygen concentrator being a pressure swing adsorption-type oxygen concentrator continuously producing oxygen by sequentially switching and repeating an adsorption step of producing oxygen under pressurized conditions and a desorption step of exhausting nitrogen under reduced pressure in each adsorption cylinder,
- wherein the oxygen concentrator is provided with a monitoring means for monitoring conditions of the flow path switching means based on the output of the pressure sensor, and detects an abnormality of the flow path switching valve when a detected value of the pressure sensor during the adsorption step and/or desorption step falls outside a predetermined threshold range.
Dependencies are inferred from the claim text.