JPS54136299A - Smoke sensor of photoelectric type - Google Patents
Smoke sensor of photoelectric typeInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010238109A (en) * | 2009-03-31 | 2010-10-21 | Nohmi Bosai Ltd | Photoelectric smoke sensor |
-
1978
- 1978-04-14 JP JP4406778A patent/JPS5829559B2/en not_active Expired
Cited By (1)
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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