JPS6477887A - Heater control device - Google Patents
Heater control deviceInfo
- Publication number
- JPS6477887A JPS6477887A JP23457587A JP23457587A JPS6477887A JP S6477887 A JPS6477887 A JP S6477887A JP 23457587 A JP23457587 A JP 23457587A JP 23457587 A JP23457587 A JP 23457587A JP S6477887 A JPS6477887 A JP S6477887A
- Authority
- JP
- Japan
- Prior art keywords
- electric current
- heater
- becomes
- shut
- current detection
- 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.)
- Pending
Links
Abstract
PURPOSE:To make it possible to shut off an electric power source with an abnormal spark quickly sensed by changing an electric current detection level in an electric current detection circuit according to the detected temperature of a heater, and turning a shut-off contact off according to the output of the circuit. CONSTITUTION:A current transformer 7 and an electric current detection circuit 8 are provided to detect a heater electric current, and an electric current detection level is made to change according to the heater 2 temperature detected with a temperature detection element 3. It the high heater electric current flows by some accident, for instance: the glass tube of the heater 2 breaks, a nichrome wire in the inside touches to a casing, and a spark etc. occurs; output becomes a H level and C87 begins charging since normal rotation input becomes higher than reverse rotation input in a comparator 84, the TRS89 becomes ON when the base electric potential of the TRS89 becomes the Zener voltage of the ZD88, electric current flows in a coil 6-1 of a trip type relay 6, and the heater circuit is shut off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23457587A JPS6477887A (en) | 1987-09-18 | 1987-09-18 | Heater control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23457587A JPS6477887A (en) | 1987-09-18 | 1987-09-18 | Heater control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477887A true JPS6477887A (en) | 1989-03-23 |
Family
ID=16973163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23457587A Pending JPS6477887A (en) | 1987-09-18 | 1987-09-18 | Heater control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477887A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011248098A (en) * | 2010-05-27 | 2011-12-08 | Konica Minolta Business Technologies Inc | Fixing device and image forming apparatus |
JP2013122486A (en) * | 2011-12-09 | 2013-06-20 | Konica Minolta Business Technologies Inc | Image forming apparatus |
-
1987
- 1987-09-18 JP JP23457587A patent/JPS6477887A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011248098A (en) * | 2010-05-27 | 2011-12-08 | Konica Minolta Business Technologies Inc | Fixing device and image forming apparatus |
JP2013122486A (en) * | 2011-12-09 | 2013-06-20 | Konica Minolta Business Technologies Inc | Image forming apparatus |
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