Patent ID: 11883697
Assignee: CARRIER CORPORATION
Field: Environmental technology (Chemistry)
Classification: CPC A | IPC A

Claim 17:
18. A transport refrigeration unit (TRU), comprising:
a housing in which components are disposed and configured to condition a container interior, the housing comprising hot spot locations proximal to each component; and
a detection system configured to detect a thermal event in the housing; and
a mitigation system coupled to the detection system and configured to take a mitigation action responsive to the thermal event being sensed by the detection system,
the detection system comprising a loop within the housing with a nominal pressure which is increasable responsive to the thermal event and a switch which is actuatable by an increased pressure in the loop to activate the mitigation system, and
the loop comprising gas-charged piping beginning and terminating at the switch and following a serpentine configuration with multiple hairpin turns proximate to the hot spot locations,
wherein the mitigation system comprises a safety controller and the mitigation action comprises a shutting off of gas flow to the components by the safety controller.