Hochiki Corporation

Hiroki Masuzawa

Keisuke Washizu

A sensoris a fire detection apparatus attached to a ceiling surface, and includes an inflow spaceprovided inside the sensor, a detection spacefor detecting a detection target, the detection spacebeing provided at a position on a ceiling surfaceside of the inflow spaceon the inside of the sensor, an inner coverfor housing the detection space, the inner coverbeing capable of allowing gas containing the detection target to flow into and out of the detection spacethrough the inflow space, an outer coverfor housing the inner cover, the outer coverbeing capable of allowing the gas to flow into and out of the inflow space, and a suppressorprovided in the inflow spaceand formed integrally with the outer cover, the suppressorbeing used to suppress inflow of moisture contained in the gas into the detection space

Fire detection apparatus

Provided is a sensorprovided with a detection elementfor detecting heat of a heat air current generated in association with a fire in a monitoring area, in which the detection elementis disposed so that a detector protrudes from a predetermined base portion of the sensor, the sensorincludes 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 detection elementalong an outer peripheral wall of the stepped portion, at least a part of the detector of the detection elementis located on a base portion side lower than the uppermost step of the stepped portion, a labyrinth portion guides the heat air current to the detector of the detection elementalong a side end portion corresponding to an outer peripheral side of the stepped portion of a plurality of partition walls, and the heat air current containing smoke introduced into the labyrinth portion is introduced to the smoke detector disposed in a lower part of the control structure via an opening penetrating the stepped portion of the control structure from an upper surface to a lower surface side.

Growing community of inventors

Tokyo, Japan

Hiroki Masuzawa