| 摘要 |
<p>Automatic device for the cut-off of combustion air in pellet stoves which can be inserted in the duct (5) for the supply of the combustion air, to prevent the backflow of hazardous gases into the room. This device (D) is composed of a parallelepiped box-shaped body (10) whose main sides (11a-11b) are connected to suitable openings and respective sections (51-52) of the supply duct (5). A plate (13) which is connected to a relative electromagnet (15) slides through a slot (121) on a lateral side (12a) of the box-shaped body (10). When the electromagnet is not energized, it releases the plate so that a spring (16) pushes it into the body of the box-shaped body (10) until it impacts the opposing perimeter side (12b) where it sill be positioned in a manner that prevents the passage of air or smoke. When instead the electromagnet (15) is energized, it extracts the plate (131) from the box-shaped body (10) so that inside it (10) there will be an opening that allows passage of combustion air.
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