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Method for controlling air and oxygen mixing concentration in respirator

A control method, ventilator technology, applied in various fluid ratio control, ventilator, non-electric variable control, etc., can solve problems such as difficult to achieve precise control, achieve precise control method, simple and fast control method, and high control accuracy Effect

Inactive Publication Date: 2016-08-24
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] Hereinafter, the method for controlling the air-oxygen mixed concentration of the ventilator of the present invention will be described in detail through specific implementations.

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

[0015] (1) Before supplying air to the ventilator, first set up 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 d of the air-oxygen mixture that the ventilator needs to output to the patient, and the oxygen content c in it. According to the values ​​of c and d, the air flow a and oxygen flow b that need to be input at the input of the ventilator can be calculated. The calculation method is as follows:

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

[0018] Oxygen flow rate b=[(c-21)*d] / ...

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Abstract

The invention provides a method for controlling the air and oxygen mixing concentration in a respirator. An air flow controllable proportional valve and an oxygen flow controllable proportional valve are arranged at the input ends of the respirator respectively, and an air flow sensor and an oxygen flow sensor are arranged at the input ends of the respirator respectively; the total flow d of air and oxygen mixed gas needing to be output by the output end of the respirator and the oxygen content c in the air and oxygen mixed gas are set in advance; according to the values of c and d, the air flow a and oxygen flow b needing to be input by the input ends of the respirator are calculated; the air flow controllable proportional valve and the oxygen flow controllable proportional valve at the input ends of the respirator are adjusted respectively so that the respirator can reach the calculated air flow a and oxygen flow b; in the air supply process, a PID control system is formed by the air flow sensor, the oxygen flow sensor and the flow controllable proportional valves, and the opening degrees of the flow controllable proportional valves are adjusted in a feedback mode and controlled so that the respirator can always keep passing of required air flow and oxygen flow.

Description

Technical field [0001] The invention relates to a method for controlling the oxygen concentration in the air-oxygen mixed gas output after air-oxygen mixing in a ventilator, and belongs to the technical field of medical equipment manufacturing. Background technique [0002] In ventilator control, the concentration of oxygen in the air-oxygen mixture inhaled by the patient needs to be accurately controlled, that is, the volume of air and oxygen is reasonably proportioned at the input end of the ventilator, and specific oxygen concentration needs to be provided according to different patients. Achieve respiratory treatment effect. At present, most of the air flow and oxygen flow at the input end of the ventilator are adjusted and controlled based on experience, which is difficult to achieve precise control. Summary of the invention [0003] The object of the present invention is to provide a method for controlling the air-oxygen mixed concentration of a ventilator, which can accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/12G05D11/13G05D7/06G05D27/02
Inventor 刁俊
Owner BEIJING AEROSPACE CHANGFENG CO LTD
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