Electromagnetically controlled tee-joint flow valve and medical breathing machine

Abstract

The invention discloses an electromagnetically controlled tee-joint flow valve and a medical breathing machine. The electromagnetically controlled tee-joint flow valve comprises an air source opening, a releasing opening and a breathing opening, wherein an inspiration valve is arranged between the air source opening and the breathing opening, an expiration valve is arranged between the breathing opening and the releasing opening, the inspiration valve and the expiration valve are regulated in a linkage relationship, are of a hollowed cylindrical nested structure and respectively comprise a fixing cylinder and a sliding cylinder which are nested together, and the sliding cylinders of the inspiration valve and the expiration valve are connected with electromagnetic drivers so as to realize synchronous control on opening degrees of the inspiration valve and the expiration valve. The medical breathing machine can control pressure and flow of inspiration and expiration by regulating the opening degrees of the inspiration valve and the expiration valve after being connected with the electromagnetically controlled tee-joint flow valve so as to maintain the suitable pressure or flow during inspiration and expiration, thus double-level pressure control and flow control of the medical breathing machine is realized; in addition, the medical breathing machine has the advantages of simple structure, convenience for using, exactness in control and capability of reducing power consumption.

Description

technical field [0001] The invention relates to a medical breathing apparatus, in particular to an electromagnetically controlled three-way flow valve and a medical ventilator. Background technique [0002] Non-invasive positive pressure ventilation (NPPV) is an effective method to help treat chronic obstructive pulmonary disease (COPD). Non-invasive positive pressure ventilation technology refers to the positive pressure ventilation treatment of COPD patients through medical ventilators and nasal masks without implanting artificial airways. Its medical ventilator can automatically control the pressure in the nasal mask according to the preset pressure value. If the pressure is set to two levels, inspiratory and expiratory, then positive pressure ventilation will assist the patient as they inhale and passively exhale due to lung recoil. [0003] Existing ventilators use three techniques to control output pressure: [0004] The first is to use a fan to adjust the pressure ...

AI Technical Summary

Problems solved by technology

[0006] For the method of controlling the pressure by regulating the fan, good pressure responsiveness and reliability depend on the motor bearing technology, the power management of the fan and the friction stability in the system, and these factors are less consistent and stable; The second method achieves the goal of controlling the pressure by simultaneously adjusting the fan and the proportional valve, so when the system is subject to the patient's cough decompression or any other interference, it is difficult to precisely control the pressure; the third method for pressure control system exists Leakage, so overall inefficiency, and noisy operation

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