US 12,396,138 B2
Heat removal systems and methods with automated fire suppression for data centers
Dale LeFebvre, Thomas, VI (US); and Kenneth Choi, Santa Clara, CA (US)
Filed by Dale LeFebvre, Thomas, VI (US); and Kenneth Choi, Santa Clara, CA (US)
Filed on Aug. 22, 2022, as Appl. No. 17/892,683.
Application 17/892,683 is a continuation in part of application No. 16/850,869, filed on Apr. 16, 2020, granted, now 11,659,693.
Application 16/850,869 is a continuation in part of application No. 16/230,799, filed on Dec. 21, 2018, granted, now 10,667,436, issued on May 26, 2020.
Application 16/230,799 is a continuation of application No. 15/678,961, filed on Aug. 16, 2017, granted, now 10,212,855, issued on Feb. 19, 2019.
Application 15/678,961 is a continuation of application No. 14/984,149, filed on Dec. 30, 2015, granted, now 9,769,960, issued on Sep. 19, 2017.
Claims priority of provisional application 62/098,176, filed on Dec. 30, 2014.
Prior Publication US 2022/0408605 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/20745 (2013.01) [H05K 7/20827 (2013.01); H05K 7/20836 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fire suppression method for a heat removal system, the fire suppression method comprising:
receiving, by a controller of the heat removal system, a temperature reading from a temperature sensor located inside a building having an inlet through which cool air is supplied to the building and an outlet through which hot air is expelled from the building without recycling, recirculating, or re-cooling the hot air, the heat removal system further having a first inlet module at the inlet of the building, an outlet module at the outlet of the building, a first louver at the first inlet module, and an exhaust fan at the outlet module;
determining, by the controller, whether the temperature reading reaches or exceeds a default or user-set temperature, indicating presence of a fire in the building;
responsive to the temperature reading reaches or exceeds the default or user-set temperature, closing the first louver at the first inlet module to shut off supply of the cool air through the inlet of the building;
determining, by the controller utilizing a pressure sensor, whether the building is under a negative pressure internally;
responsive to the building not being under a negative pressure internally, operating, by the controller, the exhaust fan to create a negative pressure internally;
determining, by the controller utilizing an oxygen sensor, whether an internal oxygen level of the building indicates that the fire has been contained; and
responsive to the fire not having been contained, activating, by the controller, a sprinkler system in the building.