With the gradual popularization of home ventilators, more and more people are purchasing ventilators as one of the home medical devices. When choosing a ventilator, most people pay attention to the price and function, but rarely understand the principle of ventilators and the difference between invasive and non-invasive ventilators. In this issue, we will give you a science popularization. 

      The basic principle of the ventilator is to drive the positive pressure between the airway opening and the alveoli through mechanical driving from the outside, so as to help patients complete the respiratory process. When a person breathes on their own the inhalation action produces negative pressure in the chest cavity, causing the lungs to expand passively and producing negative pressure in the alveoli and airways, which constitutes a difference between the airway opening and the alveoli, thus completing inhalation. After inhalation, the elastic recoil of the chest and lungs produces the opposite pressure difference thus completing exhalation. Normal breathing is achieved through the body's respiratory movements, which produce an "active negative pressure difference" between the alveoli and the airway to inhale, and the elastic recoil of the chest and lungs after inhalation produces a "passive positive pressure difference" between the alveoli and the airway opening exhale, thus meeting the needs of physiological ventilation. In contrast, ventilator ventilation is achieved through mechanical driving from the outside, and after the pressure from the outside mechanical driving removed, it relies on the elastic recoil of the chest and lungs to produce a "passive positive pressure difference" between the alveoli and the airway opening to exhale and the entire respiratory cycle is characterized by a "passive positive pressure difference". Ventilators are generally divided into non-invasive ventilators and invasiveilators. Non-invasive ventilators are generally used for the treatment of mild to moderate patients, while severe patients require invasive ventilators for treatment. The difference the two is: 1. The processing technology of non-invasive ventilators is simpler than that of invasive ventilators; 2. Non-invasive ventil have far fewer parts than invasive ventilators. Invasive ventilators have more parts than non-invasive ventilators, such as voice coil motors, solenoid, flow sensors, turbines, and fans. 

     Kunshan Tongmao Electronics Co., Ltd. is one of the few high-tech enterprises in China with ability to research and develop custom voice coil motors. Since the outbreak of the epidemic at the beginning of 2020, Tongmao has taken the initiative to bear the responsibility of a high-tech enterprise, successfully launched voice coil motors for ventilators, and has been continuously optimizing them, supplying thousands of units to ventilator manufacturers at and abroad. 

     This article is originally created by Kunshan Tongmao Electronics Co., Ltd. (www.tmmotion.com). Please indicate the source whenprinting.