JPS5481530A - Method and apparatus of safety check of heater - Google Patents
Method and apparatus of safety check of heaterInfo
- Publication number
- JPS5481530A JPS5481530A JP14710277A JP14710277A JPS5481530A JP S5481530 A JPS5481530 A JP S5481530A JP 14710277 A JP14710277 A JP 14710277A JP 14710277 A JP14710277 A JP 14710277A JP S5481530 A JPS5481530 A JP S5481530A
- Authority
- JP
- Japan
- Prior art keywords
- thermistor
- switched
- heater
- resistance
- comparator
- 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
- Control Of Temperature (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Fixing For Electrophotography (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Abstract
PURPOSE: To make easy the comparison of the resistance of a thermistor with that when broken in an apparatus with a negative characteristic thermistor as a temperature sensor, by starting heating first when operation is started, and by checking the thermistor after a specified time.
CONSTITUTION: When a start switch 31 is turned on, the voltage divided by resistors 27 and 28 and the voltage divided by a resistor 25 and a thermistor 26 are applied to a comparator 24. As the resistance of the thermistor 26 is high, the output of the comparator 24 becomes "1" and a transistor Tr 21 is switched on. In the same way, the output of the voltage comparator 13 becomes "O", Tr 9 is switched off and Tr 6 is switched on, and current is flowed through a heater 3 by the excitation of a relay 4. After a certain time, Tr 20 is switched on via a Zener diode 19, and if the resistance of the thermistor 26 is lower than a certain value including a broken case, Tr 6 is switched off and the heater 3 is deenergized.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52147102A JPS5840090B2 (en) | 1977-12-09 | 1977-12-09 | Safety check method and device for heating equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52147102A JPS5840090B2 (en) | 1977-12-09 | 1977-12-09 | Safety check method and device for heating equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5481530A true JPS5481530A (en) | 1979-06-29 |
JPS5840090B2 JPS5840090B2 (en) | 1983-09-03 |
Family
ID=15422540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52147102A Expired JPS5840090B2 (en) | 1977-12-09 | 1977-12-09 | Safety check method and device for heating equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5840090B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5576371A (en) * | 1978-12-01 | 1980-06-09 | Minolta Camera Co Ltd | Failure detecting method in heat fixing device of electrophotographic copier |
JPS5685150U (en) * | 1979-11-30 | 1981-07-08 | ||
JPS56165291A (en) * | 1980-05-26 | 1981-12-18 | Hitachi Ltd | Temperature control device for heater |
JPS5856006A (en) * | 1981-09-29 | 1983-04-02 | Sharp Corp | Fault detecting method for temperature regulator |
JPS5875622A (en) * | 1981-10-30 | 1983-05-07 | Matsushita Electric Ind Co Ltd | Liquid fuel combustion apparatus |
JPS58142119A (en) * | 1982-02-19 | 1983-08-23 | Matsushita Electric Ind Co Ltd | Liquid fuel combustion apparatus |
JPS5943416A (en) * | 1982-09-01 | 1984-03-10 | Matsushita Electric Ind Co Ltd | Temperature controller |
JPH01116665A (en) * | 1987-10-30 | 1989-05-09 | Fuji Xerox Co Ltd | Light quantity control device such as printer using led head |
JPH06307643A (en) * | 1993-04-26 | 1994-11-01 | Rinnai Corp | Cooking device |
JPH07127858A (en) * | 1993-10-29 | 1995-05-16 | Noritz Corp | Cooking heater |
-
1977
- 1977-12-09 JP JP52147102A patent/JPS5840090B2/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS629907B2 (en) * | 1978-12-01 | 1987-03-03 | Minolta Camera Kk | |
JPS5576371A (en) * | 1978-12-01 | 1980-06-09 | Minolta Camera Co Ltd | Failure detecting method in heat fixing device of electrophotographic copier |
JPS5685150U (en) * | 1979-11-30 | 1981-07-08 | ||
JPS56165291A (en) * | 1980-05-26 | 1981-12-18 | Hitachi Ltd | Temperature control device for heater |
JPS5856006A (en) * | 1981-09-29 | 1983-04-02 | Sharp Corp | Fault detecting method for temperature regulator |
JPH0211817B2 (en) * | 1981-10-30 | 1990-03-15 | Matsushita Electric Ind Co Ltd | |
JPS5875622A (en) * | 1981-10-30 | 1983-05-07 | Matsushita Electric Ind Co Ltd | Liquid fuel combustion apparatus |
JPS58142119A (en) * | 1982-02-19 | 1983-08-23 | Matsushita Electric Ind Co Ltd | Liquid fuel combustion apparatus |
JPH0232536B2 (en) * | 1982-02-19 | 1990-07-20 | Matsushita Electric Ind Co Ltd | |
JPS5943416A (en) * | 1982-09-01 | 1984-03-10 | Matsushita Electric Ind Co Ltd | Temperature controller |
JPH01116665A (en) * | 1987-10-30 | 1989-05-09 | Fuji Xerox Co Ltd | Light quantity control device such as printer using led head |
JPH06307643A (en) * | 1993-04-26 | 1994-11-01 | Rinnai Corp | Cooking device |
JPH07127858A (en) * | 1993-10-29 | 1995-05-16 | Noritz Corp | Cooking heater |
Also Published As
Publication number | Publication date |
---|---|
JPS5840090B2 (en) | 1983-09-03 |
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