US 12,260,725 B2
Fire detection apparatus
Keisuke Washizu, Tokyo (JP); and Hiroki Masuzawa, Tokyo (JP)
Assigned to HOCHIKI Corporation, Tokyo (JP)
Filed by HOCHIKI Corporation, Tokyo (JP)
Filed on Aug. 24, 2023, as Appl. No. 18/237,460.
Application 18/237,460 is a continuation in part of application No. PCT/JP2022/000541, filed on Jan. 11, 2022.
Prior Publication US 2023/0401947 A1, Dec. 14, 2023
Int. Cl. G08B 17/107 (2006.01); G08B 17/113 (2006.01)
CPC G08B 17/107 (2013.01) [G08B 17/113 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fire detection apparatus comprising:
a heat detection element configured to detect heat of a heat air current generated in association with a fire in a monitoring area, the heat detection element being disposed so that a detector protrudes from a predetermined base portion of the fire detection apparatus; and
a control structure that has a stepped portion higher than the predetermined base portion, the control structure being configured to guide the heat air current to the detector of the heat detection element along an outer peripheral wall of the stepped portion,
wherein at least a part of the detector of the heat detection element is located on a base portion side lower than the uppermost part of the stepped portion;
the fire detection apparatus further comprising a smoke detector configured to detect smoke in association with the fire,
wherein
the control structure has a labyrinth portion in which a plurality of partition walls is disposed to be erected with a gap therebetween from an upper surface of the stepped portion along an outer periphery of the stepped portion,
the labyrinth portion guides the heat air current to the smoke detector provided inside the fire detection apparatus through the gap, and supplies particles of the smoke contained in an introduced heat air current to the smoke detector, and
the labyrinth portion guides the heat air current to the detector of the heat detection element along a side end portion corresponding to an outer peripheral side of the stepped portion of the plurality of partition walls.