塵埃堆積検知装置

Japanese Patent JP7234838

B2

To provide a dust accumulation detector capable of detecting accumulation of dust regardless of a kind of dust.SOLUTION: A dust accumulation detector comprises: a reflection member 120 having two reflection planes and having an L-shaped cross section; a light emission part 102 for radiating light to the reflection member; a light detecting part 106 for detecting light reflected by the reflection member; and an evaluation part (control part 108) for evaluating a degree of dust accumulation on the reflection member according to a ratio of light intensity detected by the light detection part and intensity of radiation light from the light emission part, in a state of radiating light from the light emission part to the reflection member. The light emission part is provided at a position higher than a top end of a vertical plane out of the two reflection planes, the light emission part and the light detection part are arranged so that light radiated from the light emission part is reflected sequentially by the two reflection planes, then is detected by the light detection part. Therefore, regardless of a kind of dust, dust can be accurately detected.SELECTED DRAWING: Figure 1

Chibayashi Akatsuki
Fukunaga Tetsuya
Shouta Nakamura

JP2019129711A

March 08, 2023

July 12, 2019

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Nissin Electric Co., Ltd.

G01N21/47; G01N21/552

JP5172088U
JP2000506619A
JP4198740A
JP2007256243A
JP200974899A
JP6222006A
JP8184560A
JP2000171396A
JP2019124531A
JP771712A

Shimizu Satoshi
Kimio Matsumoto
Hiroaki Sakamoto
Tetsuji Ueshiro
Naomi Kanno

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