JPS56147211A - Temperature control circuit for electric heater - Google Patents

Temperature control circuit for electric heater

Info

Publication number
JPS56147211A
JPS56147211A JP5103780A JP5103780A JPS56147211A JP S56147211 A JPS56147211 A JP S56147211A JP 5103780 A JP5103780 A JP 5103780A JP 5103780 A JP5103780 A JP 5103780A JP S56147211 A JPS56147211 A JP S56147211A
Authority
JP
Japan
Prior art keywords
circuit
heater
contact
counter
turning
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
JP5103780A
Other languages
Japanese (ja)
Inventor
Masayuki Naruo
Daisuke Tawa
Hiroshi Manabe
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5103780A priority Critical patent/JPS56147211A/en
Publication of JPS56147211A publication Critical patent/JPS56147211A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1913—Control of temperature characterised by the use of electric means using an analogue comparing device delivering a series of pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To regulate the turning-off time of the turning-on and off control to a constant time even for a low control set temperature, by providing a generating circuit for the forced conduction command of the heater circuit in the electric heater. CONSTITUTION:AC power source 1 is connected to heater 2 through relay contact 11a, and further, power of power source 1 is converted to a constant-voltage DC power source in 5 and is divided in 6 and is supplied to thermosensitive resistor 3. The impedance change of resistor 3 accompanied with the temperature change of heater 2 is detected by detector 7. This detection value is compared with a prescribed threshold by switching circuit 8 and is decided, and relay 11 is controlled to switch contact 11a. Generating circuit 12 for the forced conduction command of the heater circuit is provided in circuit 8. Circuit 12 is provided with clock circuit 14 and counter 13, and counter 13 is driven in accordance with the cut-off output of the heater feed line of comparing circuit 9 of circuit 8; and when counter 13 counts a prescribed number of clocks of circuit 14, the signal corresponding to closing of contact 11a is given to the input of circuit 9 forcedly, thus regulating the turning-off time of contact 11a to a constant time.
JP5103780A 1980-04-15 1980-04-15 Temperature control circuit for electric heater Pending JPS56147211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5103780A JPS56147211A (en) 1980-04-15 1980-04-15 Temperature control circuit for electric heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5103780A JPS56147211A (en) 1980-04-15 1980-04-15 Temperature control circuit for electric heater

Publications (1)

Publication Number Publication Date
JPS56147211A true JPS56147211A (en) 1981-11-16

Family

ID=12875596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5103780A Pending JPS56147211A (en) 1980-04-15 1980-04-15 Temperature control circuit for electric heater

Country Status (1)

Country Link
JP (1) JPS56147211A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100432444B1 (en) * 2002-03-16 2004-05-22 주식회사 나래나노텍 Temperature control system for heater without sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430648A (en) * 1977-08-09 1979-03-07 Matsushita Electric Ind Co Ltd Temperature control apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430648A (en) * 1977-08-09 1979-03-07 Matsushita Electric Ind Co Ltd Temperature control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100432444B1 (en) * 2002-03-16 2004-05-22 주식회사 나래나노텍 Temperature control system for heater without sensor

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