VENTILATOR SCROLL ARRANGEMENT

摘要

A rooftop ventilator includes a fan arranged for rotation about a generally vertical axis. The fan is on a rooftop curb through which air is drawn by the fan from the building interior. A housing extends over the fan and said fan means, terminates above and spaced from the curb means to define a discharge opening for air drawn through the curb. A scroll arrangement is located above the curb means and arranged around the periphery of the fan to receive air discharged by the fan means and direct it toward the discharge opening. The scroll arrangement is made up of a plurality of scroll elements equally spaced around the periphery of said fan means. Each of the scroll elements includes a first elongated element having one end generally adjacent said fan periphery and extending away from said fan periphery; a second elongated element, connected to the first elements to provide a generally continuous extension from the fan periphery. Each of the first and second scroll elements are linear. The scroll arrangement also provides the support for the basic structrual parts of the ventilator.