Patent ID: 9644839
Date: 2017-05-09
CPC Classifications: F23D,F23L,F23N,F24H

Claim:
1. A dual venturi comprising, a tubular part having a primary passageway and a secondary passageway separated by an internal partition therebetween, wherein a primary gas inlet is provided on a side wall of the primary passageway; a damper part having a damper part-side secondary gas outlet and a body part, the damper part being located in an interior of the second passageway of the tubular part, for opening/closing a flow of a secondary air by rotating in a horizontal plane and a vertical plane directions, the horizontal plane direction being a cross-sectional direction of the tubular part and the vertical plane direction being perpendicular to the horizontal plane; a driving part, connected to a lateral surface of the damper part via a rotational shaft, for rotationally driving the damper part in the horizontal and vertical plane directions; and a secondary gas inlet for introducing a secondary gas into the secondary passageway of the tubular part via the damper part by means of a secondary gas inlet-side outlet, which connects selectively to the damper part-side secondary gas outlet according to a rotational position of the damper part, wherein the secondary gas inlet is coupled with the damper part such that the secondary gas inlet is configured to function as a stationary rotational shaft for fixing the damper part and the damper part can be rotated on the secondary gas inlet when the damper part is rotated by the rotational shaft of the driving part.