Ventilation proportion valve for respirator

Abstract

A ventilating proportional valve for a ventilator, which is provided with a valve chamber (1) with an air inlet (5), an air outlet (2) and a release port (6), the inner walls of the air inlet and the release port are connected to the valve chamber Inside, the side wall of the cylindrical regulating valve (8) that can be closed is slidably connected, and the regulating valve body is provided with a horizontally penetrating inlet valve hole (4) and a release valve hole (7), and the regulating valve (8) The position where the air inlet is fully opened is staggered by an angle from the position where the release port is fully opened. The maximum release area of ​​the release port is smaller than the maximum air intake area of ​​the air intake (5). The regulating valve and the stepping motor (3) Transmission connection, the valve chamber (1) is provided with a pressure and / or flow rate sensor, the sensor is electrically connected to the input end of the intelligent control circuit, and the stepping motor is electrically connected to the output end of the intelligent control circuit. The device can dynamically control the pressure and flow rate in the valve cavity to the most appropriate state, and has the advantages of low working noise and simple and compact structure.

Description

technical field [0001] The invention belongs to a medical device, in particular to a valve for adjusting the gas flow rate or pressure of a ventilator. Background technique [0002] The ventilator is an important rescue tool for critically ill patients. It has become more and more widely used clinically. It has become a necessary equipment for ICU, respiratory department, emergency department, anesthesia recovery room and other departments and family wards. The ventilator is an artificial mechanical ventilation device. , to assist or control the patient's spontaneous breathing movement, to achieve the function of lung gas exchange, reduce the work of human respiratory muscles, and facilitate the recovery of respiratory function, because it can send gas into the lungs and expel it out of the lungs It can also be called a mechanical ventilator clinically. [0003] The ventilator is mainly composed of two parts: electronic control and air circuit structure. The main function ...

AI Technical Summary

Problems solved by technology

[0004] Existing ventilation proportional valves for ventilators have the following disadvantages: the area of ​​the air inlet and release port is not adjustable or the adjustment method is complicated, because the flow or pressure released by the release port is not the same as the flow or pressure required by the actual patient. The pressure is related, so when the demand is relatively small, the released flow or pressure will be relatively large, and the noise generated in this case will also increase accordingly

In addition, because the ventilation proportional valve of the original non-invasive ventilator has superimposed components of the residual amount of exhaled gas in the application, the exhaled part of the breathing curve is not flat, and there is a slow falling part

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