Amazon.com, Inc.
Differential temperature based pressure sensing and airflow control

Abstract:

An insert for monitoring pressure changes between a cold environment and a hot environment, such as a cold aisle/hot aisle cooling system, includes a conduit having two separated openings, and a frame configured for placement between the hot environment and cold environment. One or more temperature sensors are positioned within the conduit proximate to both of the openings, and configured to sample a first temperature corresponding to the cold environment near the first opening and a second temperature associated with the hot environment near the second opening. In a cooling system, the insert can be used in conjunction with a controller to receive temperature data associated with the first and second temperatures, and determine, based on the temperature data, a direction of flow of air flowing in the conduit and a degree of overpressure or underpressure associated with the cold environment.