The present invention provides an apparatus which stably provides highly concentrated oxygen to a patient, regardless of an environmental temperature and/or a highly concentrated oxygen gas flow rate. The present invention is an oxygen concentrator characterized in that an oxygen concentration senso
The present invention provides an apparatus which stably provides highly concentrated oxygen to a patient, regardless of an environmental temperature and/or a highly concentrated oxygen gas flow rate. The present invention is an oxygen concentrator characterized in that an oxygen concentration sensor detecting a concentration of the oxygen gas produced by the oxygen concentrator, a temperature sensor measuring an environmental temperature and/or a flow rate sensor are provided, a control increasing/decreasing a supply airflow volume of the compressed air supply device based on a detected oxygen concentration detected value to maintain an oxygen concentration at a predetermined concentration is performed, and a control device is switched based on a value measured by the temperature sensor and/or flow rate sensor of the apparatus.
대표청구항▼
1. An pressure swing adsorption-type oxygen concentrator provided with an adsorption bed filled with an adsorbent, which selectively adsorbs nitrogen relative to oxygen, and a compressed air supply device, which supplies compressed air to the adsorption bed, to adsorb and eliminate nitrogen in raw m
1. An pressure swing adsorption-type oxygen concentrator provided with an adsorption bed filled with an adsorbent, which selectively adsorbs nitrogen relative to oxygen, and a compressed air supply device, which supplies compressed air to the adsorption bed, to adsorb and eliminate nitrogen in raw material air to produce unadsorbed oxygen and to supply an oxygen gas at a predetermined flow rate by a flow rate setting device, comprising: an oxygen concentration sensor, which detects a concentration of an oxygen gas produced by the oxygen concentrator,a temperature sensor, which measures an environmental temperature,a control device, which performs control by increasing or decreasing a supply airflow volume of the compressed air supply device based on a detected oxygen concentration value to maintain an oxygen concentration at a predetermined concentration,wherein the control device controls a supply airflow volume of the compressed air supply device based on a value detected by the temperature sensor when the value detected by the temperature sensor being outside a predetermined threshold,wherein the control device is a control device, which performs control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the threshold during running of the oxygen concentrator. 2. The oxygen concentrator according to claim 1, wherein the oxygen concentration sensor is a zirconia-type oxygen concentration sensor or an ultrasonic-type oxygen concentration sensor. 3. An pressure swing adsorption-type oxygen concentrator provided with an adsorption bed filled with an adsorbent, which selectively adsorbs nitrogen relative to oxygen, and a compressed air supply device, which supplies compressed air to the adsorption bed, to adsorb and eliminate nitrogen in raw material air to produce unadsorbed oxygen and to supply an oxygen gas at a predetermined flow rate by a flow rate setting device, comprising: an oxygen concentration sensor, which detects a concentration of an oxygen gas produced by the oxygen concentrator,a temperature sensor, which measures an environmental temperature,a control device, which performs control by increasing or decreasing a supply airflow volume of the compressed air supply device based on a detected oxygen concentration value to maintain an oxygen concentration at a predetermined concentration,wherein the control device controls a supply airflow volume of the compressed air supply device based on a value detected by the temperature sensor when the value detected by the temperature sensor being outside a predetermined threshold,wherein the control device is a control device, which performs control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the threshold and the supply airflow volume is lower than a predetermined airflow volume during running of the oxygen concentrator. 4. The oxygen concentrator according to claim 1, wherein the temperature dependent control device is a device, which performs control to make a supply airflow volume of the compressed air supply device to be higher than a supply airflow volume corresponding to an oxygen concentration value detected by the oxygen concentration sensor, regardless of the value detected by the oxygen concentration sensor when the temperature sensor detects a value lower than a predetermined lower temperature limit of the threshold on start-up of the oxygen concentrator. 5. The oxygen concentrator according to claim 2, wherein the lower temperature limit is 5° C. 6. An oxygen concentrator provided with an adsorption bed filled with an adsorbent, which selectively adsorbs nitrogen relative to oxygen and a compressed air supply device, which supplies compressed air to the adsorption bed to adsorb and eliminate nitrogen in raw material air to produce unadsorbed oxygen and to supply an oxygen gas at a predetermined flow rate by a flow rate setting device, comprising: an oxygen concentration sensor, which detects a concentration of an oxygen gas produced,a flow rate sensor, which measures an oxygen gas flow rate,a control device, which performs control by increasing or decreasing a supply airflow volume of the compressed air supply device based on a detected oxygen concentration value to maintain an oxygen concentration at a predetermined concentration, andwherein the control device performs control without allowing the supply airflow volume of the compressed air supply device to change when the value detected by the flow rate sensor being outside the predetermined range. 7. The oxygen concentrator according to claim 6, wherein a threshold of a value detected by the flow rate sensor is allocated individually in accordance with a set value of the flow rate setting device or independently of a set flow rate value. 8. The oxygen concentrator according to claim 7, wherein the control device is a device, which performs control without allowing the supply airflow volume of the compressed air supply device to change regardless of a value detected by the oxygen concentration sensor when the value detected by the flow rate sensor is +10% or higher or −10% or less of a set value of the flow rate setting device. 9. The oxygen concentrator according to claim 6, wherein the flow rate sensor is an ultrasonic-type flow rate sensor or a heat wire-type flow rate sensor. 10. An oxygen concentrator provided with an adsorption bed filled with an adsorbent, which selectively adsorbs nitrogen relative to oxygen and a compressed air supply device, which supplies compressed air to the adsorption bed, to adsorb and eliminate nitrogen in raw material air to produce unadsorbed oxygen and to supply an oxygen gas at a predetermined flow rate by a flow rate setting device, comprising: an oxygen concentration sensor, which detects a concentration of an oxygen gas produced by the oxygen concentrator,a temperature sensor, which measuring an environmental temperature,a flow rate sensor, which measures an oxygen gas flow rate,a control device, which performs control by increasing or decreasing a supply airflow volume of the compressed air supply device based on a detected oxygen concentration value to maintain an oxygen concentration at a predetermined concentration,wherein the control device performs control of a supply airflow volume of the compressed air supply device based on a value detected by the temperature sensor when the value detected by the temperature sensor being outside a predetermined threshold, andwherein the control device performs flow rate dependent control without allowing the supply airflow volume of the compressed air supply device to change when the value detected by the flow rate sensor being outside a predetermined range. 11. The oxygen concentrator according to claim 10, wherein the control device is a control device, which performs control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detecting a value lower than a predetermined lower temperature limit of the threshold and the supply airflow volume being lower than a predetermined airflow volume during running of the oxygen concentrator. 12. The oxygen concentrator according to claim 10, wherein the control device is a device, which performs control that makes a supply airflow volume of the compressed air supply device to be higher than a supply airflow volume corresponding to an oxygen concentration value detected by the oxygen concentration sensor, regardless of the value detected by the oxygen concentration sensor when the temperature sensor detects a value lower than a predetermined lower temperature limit of the threshold on start-up of the oxygen concentrator.
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이 특허에 인용된 특허 (6)
Leitgeb Paul (Munich DEX), Adsorption process producing varying amounts of product gas of a constant purity.
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