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Method for controlling respirator output oxygen concentration

A control method and ventilator technology, applied in the direction of ventilator, etc., can solve problems such as difficulty in achieving precise control, and achieve the effects of precise control method, high control precision, and simple and fast control method.

Inactive Publication Date: 2013-05-01
BEIJING AEROSPACE CHANGFENG CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the air flow and oxygen flow at the input end of the ventilator are adjusted and controlled based on experience, and it is difficult to achieve precise control.

Method used

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Embodiment Construction

[0013] The method for controlling the output oxygen concentration of the ventilator according to the present invention will be described in detail below through specific embodiments.

[0014] The present invention is realized through the following steps:

[0015] (1) Before the air supply of the ventilator, first set a controllable flow proportional valve and an air flow sensor at the air input end of the ventilator; set a controllable flow proportional valve and an oxygen flow sensor at the oxygen input end of the ventilator .

[0016] (2) According to the specific needs of different patients, pre-set the total flow rate d of the air-oxygen mixture output to the patient from the ventilator output end, and the oxygen content c therein. According to the values ​​of c and d, the air flow a and oxygen flow b that need to be input at the input end of the ventilator can be calculated, and the calculation method is as follows:

[0017] Air flow a=[(100-c)*d] / 79;

[0018] Oxygen f...

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PUM

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Abstract

The invention discloses a method for controlling respirator output oxygen concentration. Controlled air and oxygen flow proportional valves and air and oxygen flow sensors are respectively arranged on an input end of a respirator; the total flow d of an air-oxygen mixed gas which needs to be output by an output end of the respirator and oxygen content c are preset; the air flow a and the oxygen flow b which need to be input by the input end of the respirator are calculated according to the values of c and d; the controlled air and oxygen flow proportional valves of the input end of the respirator are respectively regulated to reach the calculated air flow a and oxygen flow b; and then, during a gas supply process, a proportion integration differentiation (PID) control system is formed by the air and oxygen flow sensors and the controlled flow proportional valves, feedback regulates and controls the openings of the controlled flow proportional valves, so that the controlled flow proportional valves can maintain the required air and oxygen flows all the time.

Description

technical field [0001] The invention relates to a method for controlling the oxygen concentration in an output air-oxygen mixed gas after air and oxygen are mixed in a ventilator, and belongs to the technical field of medical equipment manufacturing. Background technique [0002] In ventilator control, it is necessary to accurately control the concentration of oxygen in the air-oxygen mixture inhaled by the patient, that is, to make a reasonable ratio of the volume of air and oxygen at the input end of the ventilator, and to provide a specific oxygen concentration according to different patients, so as to To achieve the effect of respiratory therapy. At present, most of the air flow and oxygen flow at the input end of the ventilator are adjusted and controlled based on experience, and it is difficult to achieve precise control. Contents of the invention [0003] The purpose of the present invention is to provide a method for controlling the output oxygen concentration of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00
Inventor 刁俊
Owner BEIJING AEROSPACE CHANGFENG CO LTD
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