Proportional valve for non-invasive ventilators

Abstract

The invention belongs to the field of medical instruments and particularly relates to a proportional valve for non-invasion ventilators. The proportional valve comprises a valve body, a head cover, a valve spool and a motor. The head cover is disposed at the bottom of the valve body, and the valve spool and the motor are accommodated inside the valve body. Guide channels are arranged on the valve spool along the circumferential direction, two ends of each guide channel are the closed, and a position sensor is arranged on the side wall of the cavity of the valve spool; an air inlet valve hole, an air outlet valve hole and an exhaust valve hole respectively communicated with the corresponding guide channels are arranged in the valve body, a detector is arranged at the position of the outlet of the air outlet valve hole, and the position sensor and the detector are respectively electrically connected with an intelligent control circuit; the valve spool is driven to rotate through the motor, and conversion of the proportional valve under the states of complete air outlet, complete exhaustion and half opening and half closing can be realized by connecting or disconnecting the guide channels with the air inlet valve hole in the valve spool. The proportional valve is simple and reasonable in structure and small in size; size of pressure or flow velocity tidal volume can be controlled in real time, noises during operation can be reduced, and pressure titration or the tidal volume can be accurately controlled and provided for a patient.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a proportional valve for a non-invasive ventilator, which can adjust the gas pressure and flow rate of the non-invasive ventilator. Background technique [0002] With the development of society, medical conditions are gradually improving, and medical equipment is developing by leaps and bounds. The ventilator is a medical device developed to assist breathing in the continuous improvement of medical conditions. Ventilator is a device that can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce breathing work consumption, and save heart reserve capacity; its mechanism of action is to assist or control the patient's autonomous Respiratory exercise, in order to achieve gas exchange in the lungs, reduce the power consumption of human respiratory muscles, and facilitate the recovery of respiratory function, ...

AI Technical Summary

Problems solved by technology

[0004] However, the current mainstream ventilation proportional valve structure still has the following disadvantages: the area of ​​its air inlet and exhaust port cannot be adjusted or cannot be adjusted at the same time; The patient's rest is affected; at the same time, when the patient's flow rate or pressure demand is relatively small, the gas exhaled by the patient cannot be quickly removed, so that the pressure deviates from the set value when the patient exhales, which affects the therapeutic effect

Images