초록 ▼

An access door to an air handler unit is provided, having a double seal set in the door frame. The double seal is composed of an outer seal which provides a moisture barrier, having an aperture to permit air to pass through, and an inner seal which provides an air barrier. The inner and outer seal a

An access door to an air handler unit is provided, having a double seal set in the door frame. The double seal is composed of an outer seal which provides a moisture barrier, having an aperture to permit air to pass through, and an inner seal which provides an air barrier. The inner and outer seal are spaced apart to provide an air gap therebetween. A lip is provided along the side and top of the door to shed water away from the outer seal. The door is hingedly supported in the frame, where the outer surface of the door comes in sealing contact with the outer seal and the inner surface of the door comes in sealing contact with the inner seal when the door is closed. A set of door handles is provided to lock the seals in place when the door is closed and latched properly.

대표청구항 ▼

[ What is claimed is:] [1.] In an air handling apparatus having an enclosed duct through which air at a negative pressure is moved, an entry for gaining access to said duct that includesa door frame mounted in an opening in said duct, said frame including a first outer seal for providing a moisture

[ What is claimed is:] [1.] In an air handling apparatus having an enclosed duct through which air at a negative pressure is moved, an entry for gaining access to said duct that includesa door frame mounted in an opening in said duct, said frame including a first outer seal for providing a moisture barrier that surrounds the frame, said outer seal having an aperture therein to permit ambient air to pass therethrough, and a second inner seal for providing an air barrier that surrounds said frame, said seals having an air gap therebetween; anda door hingedly supported in said frame, said door having a first surface means for closing in sealing contact against said outer seal and a second surface means for closing in sealing contact against said inner seal when the door is closed against the frame whereby the air gap between the seals is maintained at ambient pressure when the door is at closure.