Amazon.com, Inc.
Controlled bypass temperature based pressure and airflow control

Abstract:

A cold air outlet assembly can include one or more cold air outlets arranged to channel cold air to a contained cold region or cold aisle, and one or more bypass ducts arranged to fluidly connect a hot external environment with the cold region adjacent the cold air outlets. The bypass ducts include backdraft dampers arranged to allow flow of hot air from the hot environment to the cold region and restrict flow of cold air from the cold region to the hot environment so that, in operation, limited mixing of hot air and cold air within the cold region occurs under low pressure conditions in the cold region. The temperature of the mixed hot and cold air can be sensed and used for controlling airflow to the cold region.