초록 ▼

A damper unit is provided that is adapted to be positioned in a furnace duct line. The damper unit has a housing which is in communication with a fresh air source and a furnace system. The housing has a damper blade which is moveable between an open position which allows air flow through the housing

A damper unit is provided that is adapted to be positioned in a furnace duct line. The damper unit has a housing which is in communication with a fresh air source and a furnace system. The housing has a damper blade which is moveable between an open position which allows air flow through the housing and a closed position which prevents air flow through the housing. The blade is coupled with a solenoid so that when the solenoid is activated the blade is moved to an open position allowing air flow through the housing. Further, a fan is located in the housing adjacent the damper blade. The fan operates to move air into and out of the housing and across the damper blade when the damper blade is in its open position. In one embodiment, a pair of sealing ridges are provided on the interior of the housing. When the damper blade is in a closed position, it is in abutting relationship with the sealing ridges so that air flow across the closed damper blade is substantially prevented by the damper blade and the sealing ridges.

대표청구항 ▼

[ We claim:] [1.]1. A damper unit adapted to be positioned in communication with a furnace at a furnace duct line for selectively providing fresh air to an indoor environment, comprising:a housing having an inlet opening in spatial communication with a fresh air source and an exit opening in spatial

[ We claim:] [1.]1. A damper unit adapted to be positioned in communication with a furnace at a furnace duct line for selectively providing fresh air to an indoor environment, comprising:a housing having an inlet opening in spatial communication with a fresh air source and an exit opening in spatial communication with the furnace duct line;a damper blade disposed completely in said housing and moveable between an open position which allows the passage of air through said housing and a closed position which blocks the flow of air through said housing;means for actuating said blade between its open and closed positions; anda fan disposed in said housing adjacent said blade, said fan operating to move air into said housing, across said blade in its open position, out of said exit opening, and into the furnace duct line wherein said actuating means and said fan are electrically connected to the furnace to be simultaneously operated in conjunction therewith.