JPS54136299A - Smoke sensor of photoelectric type - Google Patents

Smoke sensor of photoelectric type

Info

Publication number
JPS54136299A
JPS54136299A JP4406778A JP4406778A JPS54136299A JP S54136299 A JPS54136299 A JP S54136299A JP 4406778 A JP4406778 A JP 4406778A JP 4406778 A JP4406778 A JP 4406778A JP S54136299 A JPS54136299 A JP S54136299A
Authority
JP
Japan
Prior art keywords
smoke
sensor
height
labyrinth
sensing part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4406778A
Other languages
Japanese (ja)
Other versions
JPS5829559B2 (en
Inventor
Shigeto Harano
Yoshihiko Okuda
Tsunehiko Araki
Shuji Kamaya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP4406778A priority Critical patent/JPS5829559B2/en
Publication of JPS54136299A publication Critical patent/JPS54136299A/en
Publication of JPS5829559B2 publication Critical patent/JPS5829559B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE: To obtain quick and sure response through rapid introduction of smoke, by taking the ratio of the full height of the labyrinth to the height of cone guide within a specific range to introduce the smoke to the smoke sensing part in the sensor.
CONSTITUTION: Smoke can be introduced quickly to the smoke sensing part 14 placed in the sensor hausing consisting of the sensor base 1 and the sensor cover 2, when a fire is taken place. This smoke reaches the smoke sensing part partly after being passed through the labyrinth 2b formed at the base of the cone guide 16 projected upperward and the 6 sets of partitions 15 inside of it, and apart of it is flown away external the sensor after being passed through the labyrinth opposing. In this case, when the height l from the lower side of the labyrinth 2b of the guide 16 to the top is higher, the effect which catches the smoke and introduce it to the smoke sensor, is greater. But the higher the height, the greater the fluid resistance is, then the optimum effect can be obtained for smoke introduction by taking the ratio of the labyrinth 2b of height l to the full height lo as 1/2 to 2/3, and quick response can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP4406778A 1978-04-14 1978-04-14 photoelectric smoke detector Expired JPS5829559B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4406778A JPS5829559B2 (en) 1978-04-14 1978-04-14 photoelectric smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4406778A JPS5829559B2 (en) 1978-04-14 1978-04-14 photoelectric smoke detector

Publications (2)

Publication Number Publication Date
JPS54136299A true JPS54136299A (en) 1979-10-23
JPS5829559B2 JPS5829559B2 (en) 1983-06-23

Family

ID=12681274

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4406778A Expired JPS5829559B2 (en) 1978-04-14 1978-04-14 photoelectric smoke detector

Country Status (1)

Country Link
JP (1) JPS5829559B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010238109A (en) * 2009-03-31 2010-10-21 Nohmi Bosai Ltd Photoelectric smoke sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010238109A (en) * 2009-03-31 2010-10-21 Nohmi Bosai Ltd Photoelectric smoke sensor

Also Published As

Publication number Publication date
JPS5829559B2 (en) 1983-06-23

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