PARTICLE-DETECTING SENSOR, DUST SENSOR, SMOKE DETECTOR, AIR PURIFIER, FAN, AND AIR CONDITIONER

摘要

A particle-detecting sensor (1) that has a light-emitting element (10) and a light-receiving element (20). Light from the light-emitting element (10) that has been scattered by particles in a detection region (DA) is received by the light-receiving element (20) in order to detect particles in a gas. This particle-detecting sensor (1) is provided with a heating device (50) that heats the gas and a reflector (40) that reflects the scattered light so as to guide said scattered light to the light-receiving element (20).