JPS5481530A - Method and apparatus of safety check of heater - Google Patents

Method and apparatus of safety check of heater

Info

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
Application number
JP14710277A
Other languages
Japanese (ja)
Other versions
JPS5840090B2 (en
Inventor
Yoshinori Kudo
Motoshi Miyanaka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP52147102A priority Critical patent/JPS5840090B2/en
Publication of JPS5481530A publication Critical patent/JPS5481530A/en
Publication of JPS5840090B2 publication Critical patent/JPS5840090B2/en
Expired legal-status Critical Current

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
JP52147102A 1977-12-09 1977-12-09 Safety check method and device for heating equipment Expired JPS5840090B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (13)

* Cited by examiner, † Cited by third party
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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