JPS55108015A - Protective device for temperature control - Google Patents

Protective device for temperature control

Info

Publication number
JPS55108015A
JPS55108015A JP1546279A JP1546279A JPS55108015A JP S55108015 A JPS55108015 A JP S55108015A JP 1546279 A JP1546279 A JP 1546279A JP 1546279 A JP1546279 A JP 1546279A JP S55108015 A JPS55108015 A JP S55108015A
Authority
JP
Japan
Prior art keywords
thermister
temperature
relay
temperature control
vessel
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
Application number
JP1546279A
Other languages
Japanese (ja)
Inventor
Michio Nakajima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1546279A priority Critical patent/JPS55108015A/en
Publication of JPS55108015A publication Critical patent/JPS55108015A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Temperature (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

PURPOSE: To prevent the occurrence of overheat fault of heating furnace and dryer and of a fire in advance, by connecting the photo diode in series with the thermister used for the temperature control unit and detecting the open wire of the thermister circuit.
CONSTITUTION: In performing the temperature control of the heating vessel 15 with the heater 11 under the control of the relay 10, the detection signal of the thermister 1 detecting the temperature in the vessel 15 is fed to the junction between the temperature set resistor 2a and the photo coupler 3. Further, when the thermister 1 is conductive, the transistor Tr12 is OFF by flowing current to the photo coupler 3 to turn on Tr14, and the relay 10 is operated via Tr9 with the output of the comparator 8 to keep the temperature in the vessel 15 within a given temperature. Further, if the thermister 1 is in open wire, the coupler 3 is OFF, Tr12 is ON, and Tr14 is OFF. Further, the relay 10 is OFF independently of the output of the comparator 8 to keep the heater 11 OFF to prevent the failure due to open wire of the thermister 1 in advance.
COPYRIGHT: (C)1980,JPO&Japio
JP1546279A 1979-02-15 1979-02-15 Protective device for temperature control Pending JPS55108015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1546279A JPS55108015A (en) 1979-02-15 1979-02-15 Protective device for temperature control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1546279A JPS55108015A (en) 1979-02-15 1979-02-15 Protective device for temperature control

Publications (1)

Publication Number Publication Date
JPS55108015A true JPS55108015A (en) 1980-08-19

Family

ID=11889455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1546279A Pending JPS55108015A (en) 1979-02-15 1979-02-15 Protective device for temperature control

Country Status (1)

Country Link
JP (1) JPS55108015A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166990U (en) * 1984-04-14 1985-11-06 ソニー株式会社 heating device
JPS6365988U (en) * 1986-10-18 1988-04-30

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166990U (en) * 1984-04-14 1985-11-06 ソニー株式会社 heating device
JPS6365988U (en) * 1986-10-18 1988-04-30

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