| 摘要 |
<p>A kitchen extractor hood which comprises an outlet that is located usually on the upper part of the hood shield casing. The outlet is connected to a centrifugal blower located inside the hood shield casing (H). The primary function of the hood is to expel cooking fumes from the household kitchen by the air pressure generated by the blower, via the outlet into an appropriate ducting system. The invention eliminates the need for a centrifugal blower by mounting a motor driven propeller (M) in the outlet. When the motor is running, the propeller creates air pressure that pushes cooking fumes collected by hood shield casing (H) through the outlet and into the duct system. The result is a reduction of components needed to manufacture the hood, higher efficiency due to the axially direct flow of the cooking fumes from the hood shield casing through the outlet and into the duct system. Without a centrifugal blower system inside, the hood shield casing (H) can have more designs possibilities than those limited by the dimensions of the centrifugal blower.</p> |
