US 12,228,319 B2
Maintenance recommendation system
Takayuki Uchida, Tokyo (JP); Kazuki Horiwaki, Tokyo (JP); Shuntaro Hitomi, Tokyo (JP); and Yasuharu Namba, Tokyo (JP)
Assigned to Hitachi, Ltd., Tokyo (JP)
Filed by Hitachi, Ltd., Tokyo (JP)
Filed on Sep. 27, 2021, as Appl. No. 17/485,987.
Claims priority of application No. 2020-194803 (JP), filed on Nov. 25, 2020.
Prior Publication US 2022/0163246 A1, May 26, 2022
Int. Cl. F25B 49/00 (2006.01)
CPC F25B 49/005 (2013.01) 10 Claims
OG exemplary drawing
 
1. A maintenance recommendation system that identifies a failure mode of an inspection item, the system comprising:
an information input unit configured to receive, as an input, at least one or more inspection results necessary to identify a failure mode; and
a computer configured to
store therein (i) the inspection result, (ii) a failure mode probability table containing recorded information relating to a probability of occurrence of the failure mode, and (iii) an inspection item probability table containing information relating to a probability that an inspection item exhibits specified inspection item behavior when the failure mode occurs;
estimate the probability of the failure mode from the at least one time or more inspection results and the information from the failure mode probability table and the inspection item probability table;
change a criterion for calculating a probability in association with a change in the inspection item; and
among the failure mode probability table and the inspection item probability table, update only the failure mode probability table when the change in the inspection item occurs.