Patent ID: 9372009
Filing Date: 2016-06-21
CPC Classification: F24F,G05D

Claim Text:
1. A pressurization control system configured to regulate air pressure within a room, the room comprising a closeable doorway, the system comprising: a first damper fluidly coupled to an air supply duct and having an operating range, the first damper configured to control delivery of a main air flow directly to the room; a second damper having an operating range, the second damper fluidly coupled to a second air supply duct, the second damper configured to control delivery of a supplemental air flow directly to the room, the supplemental air flow being separate from the main air flow; and a room controller configured to: wherein in a first configuration, the first control signal drives the first damper to direct the main air flow towards a deadband within the operating range of the first damper, the deadband within the operating range of the first damper including a pressure set point for the room, and when the air pressure within the room is within the deadband within the operating range of the first damper, the second control signal drives the second damper to direct the supplemental air flow towards the pressure set point for the room, and wherein in response to the closeable doorway opening and the air pressure within the room increasing, the second control signal drives the second damper towards a closed position, and when the air pressure within the room exits the deadband, the first control signal drives the first damper towards a closed position until a low flow limit is reached.