Multifunctional safety valve

Abstract

A multi-functional safety valve comprises a valve body, an air-oxygen mixing cavity, a control gas chamber and an exhaust chamber, an air-oxygen input, an air suction port, an exhaust port and a gas control port are arranged on the valve body, the air-oxygen input and the air suction port are communicated with the air-oxygen mixing cavity, the exhaust port is communicated with the exhaust chamber, the gas control port is communicated with the control gas chamber; an air suction valve and a pressure reducing valve are arranged in the body, the air suction valve is sealed or the air-oxygen mixing cavity and the exhaust chamber are conducted by the action of the pressure reducing valve, the multi-functional safety valve further comprises: a two-position three-way electromagnetic valve, a first end thereof is connected with a gas source, a second end is connected with the gas control port and a third end is communicated with atmosphere; a pressure sensor, which is arranged in the air-oxygen mixing cavity and transmits a signal to a microprocessor according to the gas pressure in the air-oxygen mixing cavity; and a microprocessor, which controls the on-off of the two-position three-way electromagnetic valve according to the signal which is transmitted by the pressure sensor. Therefore, when the air suction pressure is super high or super low, a power supply is switched off and other accidents occur, the multi-functional safety valve can form the automatic protection, thus protecting the safety of a user of a respirator.

Description

technical field [0001] The invention relates to a multifunctional safety valve, which is a gas control valve for ensuring the safety of ventilator users. Background technique [0002] As a medical device with therapeutic effect, the first condition of the ventilator is to ensure the safety of the user. It is the most basic safety requirement to ensure that the user can always ventilate freely in case of various accidents of the device. During the use of the ventilator, unexpected situations such as power outages, ultra-high inspiratory pressure, and ultra-low inspiratory pressure (gas source cut-off) may occur. When the above serious situations occur, the usual measure is to manually disconnect the gas path connected to the patient, so that the patient can communicate with the atmosphere, so as to ensure the basic spontaneous breathing of the patient, so that the patient will not be suffocated by the machine or other dangerous situations. However, due to the need to manuall...

AI Technical Summary

Problems solved by technology

However, due to the need to manually disconnect the gas circuit connected to the patient in case of an accident, there will be two situations: either the medical staff must be constantly monitored and the labor intensity is increased, or the patient is in danger of breathing due to insufficient monitoring

At present, most of the common gas control valves used to ensure the safety of ventilator users use simple safety valves or cannot protect against unexpected situations such as power failures, ultra-high or ultra-low inspiratory pressures, etc.

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