JPS55108015A - Protective device for temperature control - Google Patents
Protective device for temperature controlInfo
- 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
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
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)
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 |
-
1979
- 1979-02-15 JP JP1546279A patent/JPS55108015A/en active Pending
Cited By (2)
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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