TWI604421B
A photoelectric smoke sensor (1) includes a housing (3) of an explosion-proof structure having a circuit accommodation chamber (18) to accommodate a circuit board (20), an inflow chamber (45) provided in the housing (3) and communicating with the designated exposition-proof zone (Z), a light emittin...
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| Zusammenfassung: | A photoelectric smoke sensor (1) includes a housing (3) of an explosion-proof structure having a circuit accommodation chamber (18) to accommodate a circuit board (20), an inflow chamber (45) provided in the housing (3) and communicating with the designated exposition-proof zone (Z), a light emitting portion (55) provided in the inflow chamber (45), and a light receiving portion (56) provided in the inflow chamber (45). The light emitting portion (55) includes a first light guide (59) guiding light emitted by the light emitting element (58) to the inflow chamber (45) and a first support portion (57) surrounding and holding the first light guide (59) and communicating with the circuit accommodation chamber (18). The light receiving portion (56) includes a second light guide (79) receiving light emitted by the light emitting element (58) in the inflow chamber (45) and guiding the light to the light receiving element (78) and a second support portion (77) surrounding and holding the second light guide (79) and c |
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