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US 8,077,018 B2Granted
Smoke detector
AssigneeNohmi Bosai Ltd.
InventorHiroyuki Yokota
Life of this patent
Estimating the term…
Abstract
To enable an air velocity of sampling air to be precisely measured, a smoke detector (S) includes: a smoke detection part (22) connected to a sampling pipe (11); a fan (12) that sucks sampling air (SA) into the sampling pipe; and an air velocity sensor (15) that measures an air velocity of the sampling air within the sampling pipe. The air velocity sensor (15) is disposed at a primary side of the fan (12), and a straightening vane (25) is disposed between the air velocity sensor (15) and a suction port (12a) of the fan (12).
Claims4
A smoke detector, comprising:
- a smoke detection part having an inflow port and an outflow port;
- a sampling pipe disposed in a monitor space;
- an airflow pipe coupled with the sampling pipe;
- and
- an intake side flow path branch part disposed in the airflow pipe and coupled with the inflow port of the smoke detection part,
- wherein the intake side flow path branch part has an intake port directed opposite to a flow direction of sampling air flowing in the airflow pipe.
3 more elements
Dependencies are inferred from the claim text.