Optoelectronic dust sensor and air conditioning equipment in...

Details Optoelectronic dust sensor and air conditioning equipment in... Optoelectronic dust sensor and air conditioning equipment in...

2006-05-02

2006-05-02

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C340S630000

Reexamination Certificate

active

07038189

ABSTRACT:
At an optoelectronic dust sensor, opening(s) is/are formed at front panel(s) of main body housing(s), and passage hole(s) is/are formed at back panel(s) of main body housing(s). Provided between such back panel passage hole(s) and front panel opening(s) is/are dust passage route(s) permitting passage of dust and/or smoke. Passage hole(s) is/are for introducing dust and/or smoke to dust passage route(s). Opening(s), being for discharging dust and/or smoke from dust passage route(s), is/are sufficiently larger than passage hole(s).

REFERENCES:
patent: 4906978 (1990-03-01), Best et al.
patent: 5319827 (1994-06-01), Yang
patent: 2004/0155178 (2004-08-01), Ito
patent: 8-62136 (1996-03-01), None

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