JPS57103516A - Liquid temperature controller - Google Patents

Liquid temperature controller

Info

Publication number
JPS57103516A
JPS57103516A JP17879380A JP17879380A JPS57103516A JP S57103516 A JPS57103516 A JP S57103516A JP 17879380 A JP17879380 A JP 17879380A JP 17879380 A JP17879380 A JP 17879380A JP S57103516 A JPS57103516 A JP S57103516A
Authority
JP
Japan
Prior art keywords
voltage
output
timer
temperature
supplied
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
JP17879380A
Other languages
Japanese (ja)
Other versions
JPH0254573B2 (en
Inventor
Kazumi Ishima
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP17879380A priority Critical patent/JPS57103516A/en
Priority to US06/330,981 priority patent/US4467183A/en
Priority to DE19813150601 priority patent/DE3150601A1/en
Publication of JPS57103516A publication Critical patent/JPS57103516A/en
Publication of JPH0254573B2 publication Critical patent/JPH0254573B2/ja
Granted 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
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values

Landscapes

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

Abstract

PURPOSE:To avoid the thermal overshoot which is caused by the rise control, by changing the set time of a timer for rise with the differential voltage between the voltage corresponding to the temperature of a liquid measured before the control of temperature is applied and the reference voltage that gives a target temperature. CONSTITUTION:The output voltage of temperature sensors 7 and 8 is compared with the reference voltage corresponding to a target temperature given from a reference setting power supply 11 through differential amplifiers 9 and 10. The output of the amplifier 9 is supplied to a timer 12, and the output of the amplifier 10 is supplied to a heater driving circuit 13 respectively. When the liquid temperature is slightly lower than a target level, the output voltage of a sensor 7 is also set at a low level. As a result, the output of the timer 12 is turned into a comparatively short pulse. This pulse is supplied to the circuit 13. Thus the voltage which is previously set at a high level is applied to a heater 14 while a pulse is delivered from the timer 12. When no pulse is delivered from the timer 12, the circuit 13 controls the voltage to be supplied to the heater 14 with the output of the amplifier 10.
JP17879380A 1980-12-19 1980-12-19 Liquid temperature controller Granted JPS57103516A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17879380A JPS57103516A (en) 1980-12-19 1980-12-19 Liquid temperature controller
US06/330,981 US4467183A (en) 1980-12-19 1981-12-15 Liquid temperature control apparatus comprising initial temperature dependent high power heater drive
DE19813150601 DE3150601A1 (en) 1980-12-19 1981-12-21 "DEVICE FOR CONTROLLING A LIQUID TEMPERATURE"

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17879380A JPS57103516A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Publications (2)

Publication Number Publication Date
JPS57103516A true JPS57103516A (en) 1982-06-28
JPH0254573B2 JPH0254573B2 (en) 1990-11-22

Family

ID=16054737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17879380A Granted JPS57103516A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Country Status (1)

Country Link
JP (1) JPS57103516A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5462134U (en) * 1977-10-11 1979-05-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5462134U (en) * 1977-10-11 1979-05-01

Also Published As

Publication number Publication date
JPH0254573B2 (en) 1990-11-22

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