Patent ID: 8453359

Claim:
An air-feed device of a boiler iron, the boiler iron having a vapor boiler with a heating plate and having a wet vapor snoot configured to discharge wet vapor, the air-feed device comprising: a three-position guiding valve having a body, the body of the guiding valve including a valve chamber therein, the valve chamber having an air inlet connected to the boiler, and having first and second air outlets, wherein the first air outlet is connected to the wet vapor snoot and the second air outlet is connected to the heating plate; a valve rod disposed in the valve body and having a proximal end and a distal end; and a valve plug attached to the distal end of the valve rod, wherein: when the valve rod is in a first position, the valve plug blocks the valve chamber between the first air outlet and the air inlet, and only the second air outlet is connected to the air inlet through the valve body, when the valve rod is in a second position, the valve plug blocks the valve chamber between the second air outlet and the air inlet, and only the first air outlet is connected to the air inlet through the valve body, and when the valve rod is in a third position, the valve plug does not block the valve chamber between any of the first air outlet, the second air outlet and the air inlet, whereby the first air outlet, the second air outlet and the air inlet are all connected to each other through the valve body.