| 摘要 |
<p>A method and a device are described which allow any open fireplace to operate normally even though it has any type of malfuction which may cause a blow-back of smoke. The method uses a suction housing (1) containing an electric turbine (2) which compresses outside air and feeds it via a duct (12, 13) to a nozzle (7) mounted inside the chimney hood at the foot of the flue and provided with two cascaded venturi nozzles (8, 9) placed one above the other. The device is particularly intended for open fireplaces located in rooms which have controlled mechanical ventilation.</p> |
