Exhalation membrane valve

Abstract

The invention relates to an exhalation membrane valve which comprises an exhalation valve body installation base 6, an exhalation adapter 8, an exhalation pressure air inlet base 2, a membrane assembly and an exhalation valve locking nut 1. The exhalation adapter 8 is connected with the exhalation valve body installation base 6. The exhalation pressure air inlet base 2 and the membrane assembly are sequentially arranged in the exhalation valve body installation base 6. The exhalation valve locking nut 1 is arranged on the outer side of the exhalation pressure air inlet base 2 and is rotatably fixed with the exhalation valve body installation base 6. A hollow exhalation valve membrane 5 divides a whole exhalation valve into an upper cavity and a lower cavity, two interfaces are arranged in a positive end expiratory pressure (PEEP) cavity 1, one interface is connected with a PEEP valve to control air inlet, and the other interface is connected with the air (the caliber is controlled by a flow proportional valve). Two interfaces are arranged in an exhalation cavity 12, one interface is connected with patient exhalation airflow, and the other interface is directly connected with the air. The membrane is thin-wall and hollow so that the membrane is sensitive to acting force exerted on the membrane very much and can fast respond to seal or release exhalation airflow, the delay time is shortened, data are accurate and reliability of breathing machines is improved.

Description

technical field [0001] The invention relates to a very important safety component in a ventilator (the ventilator belongs to Class III equipment in medical equipment), in particular to an exhalation valve control system for the ventilator and anesthesia machine. Background technique [0002] The ventilator and anesthesia machine use the exhalation valve to control the patient's exhalation, and its main function is to cooperate with the breathing assistance equipment for breathing action. It closes during inspiration so that the gas supplied by the device can be fully delivered to the patient. At the end of inspiration, the exhalation valve can continue to close to hold your breath, and it only opens when you exhale to make it open; when the airway pressure is lower than PEEP, the exhalation part must be closed to maintain PEEP. Exhalation can only be exhaled from this circuit, not inhaled from this circuit. [0003] Common exhalation valves include moving iron solenoid val...

AI Technical Summary

Problems solved by technology

Generally speaking, electromagnetic proportional valves are not universal parts. They are specially designed and produced by various manufacturers according to their needs. The cost ratio is high. Its advantages are fast response time and relatively stable performance. The valve and the patient's exhaled air cannot be in direct contact. In addition, due to frequent disassembly, disinfection and reassembly, the processing and assembly requirements for each component are increased, and its life is shortened at the same time.

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