Ventilator

 Ventilator this word is now a days very common due to corona it' importance is increase at pick

lets know what is ventilator?

vent is small hole to allow air come in and out, also remove smoke, steam smells.

so ventilator does this venting function continuously 

its a machine blow air or oxygen to your lung 

when to use ventilator?

when you do not get oxygen to your blood which called respiratory failure then ventilator is used to push oxygen to lungs

Basic principle of ventilator

it is same as pump one stock suck air/oxygen and second stock push it to lungs.

here is fig, for e.g.

here is real ventilator example

here is shown in fig. 3 main components

to push the middle balloon need mechanism to press it continuously

here i will show you the mechanism can use for it.

This drive gear connected with motor which continuously pups with selected speed of demand & oxygen pumps to lungs by breathing circuit to control its speed and amount of oxygen controller is there to control

Thanks