US 12,274,903 B2
Fire detection apparatus
Yasuharu Fujiwara, Tokyo (JP); Isao Saeki, Tokyo (JP); and Hideki Takano, Tokyo (JP)
Assigned to HOCHIKI Corporation, Tokyo (JP)
Filed by HOCHIKI Corporation, Tokyo (JP)
Filed on Jan. 2, 2024, as Appl. No. 18/402,258.
Application 18/402,258 is a division of application No. 17/033,714, filed on Sep. 26, 2020, granted, now 11,975,228.
Application 17/033,714 is a continuation in part of application No. PCT/JP2019/012780, filed on Mar. 26, 2019.
Claims priority of application No. 2018-062681 (JP), filed on Mar. 28, 2018; application No. 2018-162772 (JP), filed on Aug. 31, 2018; and application No. 2018-173389 (JP), filed on Sep. 18, 2018.
Prior Publication US 2024/0139569 A1, May 2, 2024
Int. Cl. G01J 5/00 (2022.01); A62C 37/36 (2006.01); G01J 5/04 (2006.01); G01N 21/53 (2006.01)
CPC A62C 37/04 (2013.01) [G01J 5/0014 (2013.01); G01J 5/048 (2013.01); G01N 21/53 (2013.01)] 5 Claims
OG exemplary drawing
 
2. A fire detection apparatus for detecting a fire in a monitored area, the fire detection apparatus comprising:
a housing;
a first detection space for performing detection of a first detection target contained in a gas flowing in from an outside of the housing on the inside of the housing;
a second detection space located on the inside or the outside of the housing, the second detection space being provided to perform detection of a second detection target;
a partition wall provided in the housing, the partition wall being provided to partition the first detection space or the second detection space so that inhibiting the gas flowing into the first detection space from flowing out to the second detection space is allowed;
an inflow hole provided in the housing to allow the gas containing the first detection target to flow into the first detection space; and
a first detection target detecting unit that detects the first detection target, the first detection target detecting unit being accommodated in the first detection space,
wherein the partition wall is configured to surround at least a part of a periphery of the first detection target detecting unit and the inflow hole in the first detection space.