Ventilator is a crucial medical equipment which enables to treat respiratory failure, reduce complication and prolong patient‘s life. In the absence of specific drug, ventilator and extracorporeal membrane oxygenation (ECMO) is extremely critical to the treatment of novel coronavirus pneumonia. According to the relevant medical reports, novel coronavirus pneumonia will cause obvious damage to the lung function of patients. Severe case must rely on the ventilator to achieve assistant ventilation once confusion, respiratory failure or shock, thus enhances blood oxygen saturation and decrease the mortality rate. In fact, sintered neodymium magnet has also served as the ventilator magnet in the exhalation valve.

About Ventilator Magnet

Exhalation valve is a necessary component of the ventilator. The positive end expiration pressure (PEEP) function of the ventilator can help patients to preserve some gas in their lungs and hence enhance oxygenation time. Most of current exhalation valves are utilizes voice coil motor to drive the diaphragm to do linear displacement and this displacement will change the throttle area of fluid channel to dominate the on-off and flow rate, thus inhale and exhale can be controlled. Ventilator magnet is essentially a voice coil motor magnet. The voice coil motor in the exhalation of ventilator is composed of a ventilator magnet situated within a moving coil and all of two are inside of a ferromagnetic cylinder. Coil will be magnetized when current run through the coil and repels against the magnets, thus producing an in and out motion.