JPS57103512A - Liquid temperature controller - Google Patents

Liquid temperature controller

Info

Publication number
JPS57103512A
JPS57103512A JP17878980A JP17878980A JPS57103512A JP S57103512 A JPS57103512 A JP S57103512A JP 17878980 A JP17878980 A JP 17878980A JP 17878980 A JP17878980 A JP 17878980A JP S57103512 A JPS57103512 A JP S57103512A
Authority
JP
Japan
Prior art keywords
output
circuit
supplied
temperature
liquid
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
JP17878980A
Other languages
Japanese (ja)
Other versions
JPH0254569B2 (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 JP17878980A priority Critical patent/JPS57103512A/en
Priority to US06/330,981 priority patent/US4467183A/en
Priority to DE19813150601 priority patent/DE3150601A1/en
Publication of JPS57103512A publication Critical patent/JPS57103512A/en
Publication of JPH0254569B2 publication Critical patent/JPH0254569B2/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 prevent the thermal overshoot which is caused by the rise control of the liquid temperature, by varying the electric power to be applied during the rise. CONSTITUTION:The temperature of a liquid is detected by temperature sensors 7 and 8, and this output voltage is compared through differential amplifiers 9 and 10 with the reference voltage corresponding to a target temperature given from a reference setting power supply 11 to be supplied to an adder circuit 12. The output of the circuit 12 is supplied to an output circuit 13, and the output of the amplifier 10 is supplied to an output circuit 15. The output of the circuit 15 is supplied to a heater 17 through a reverse current preventing diode 16. In case when the temperature of the liquid is slightly lower than the target level, the output voltage of the circuit 12 is low. Accordingly the level is low for the output of the circuit 13 which is delivered while a timer 14 is active for a certain period of time. As a result, the electric power required for the rise can be reduced.
JP17878980A 1980-12-19 1980-12-19 Liquid temperature controller Granted JPS57103512A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17878980A JPS57103512A (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
JP17878980A JPS57103512A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Publications (2)

Publication Number Publication Date
JPS57103512A true JPS57103512A (en) 1982-06-28
JPH0254569B2 JPH0254569B2 (en) 1990-11-22

Family

ID=16054663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17878980A Granted JPS57103512A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Country Status (1)

Country Link
JP (1) JPS57103512A (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
JPH0254569B2 (en) 1990-11-22

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