JPS57103513A - Liquid temperature controller - Google Patents

Liquid temperature controller

Info

Publication number
JPS57103513A
JPS57103513A JP17879080A JP17879080A JPS57103513A JP S57103513 A JPS57103513 A JP S57103513A JP 17879080 A JP17879080 A JP 17879080A JP 17879080 A JP17879080 A JP 17879080A JP S57103513 A JPS57103513 A JP S57103513A
Authority
JP
Japan
Prior art keywords
output
circuit
supplied
rise
temperature
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
JP17879080A
Other languages
Japanese (ja)
Other versions
JPH0254570B2 (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 JP17879080A priority Critical patent/JPS57103513A/en
Priority to US06/330,981 priority patent/US4467183A/en
Priority to DE19813150601 priority patent/DE3150601A1/en
Publication of JPS57103513A publication Critical patent/JPS57103513A/en
Publication of JPH0254570B2 publication Critical patent/JPH0254570B2/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 changing the time during which the voltage is applied to a heating part during the rise. 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. These outputs of comparison are supplied to an adder circuit 12. The output of the amplifier 10 is supplied to an output circuit 16, and the output of the circuit 16 is supplied to a heater 18 through a diode 17 to carry out the control. In case when the temperature of the liquid is slightly lower than the target level, the output voltage of the circuit 12 is set at a low level. Accordingly the duration of the output pulse of a timer 13 is small, and the electric power required for the rise delivered from an output circuit 14 can be reduced.
JP17879080A 1980-12-19 1980-12-19 Liquid temperature controller Granted JPS57103513A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17879080A JPS57103513A (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
JP17879080A JPS57103513A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Publications (2)

Publication Number Publication Date
JPS57103513A true JPS57103513A (en) 1982-06-28
JPH0254570B2 JPH0254570B2 (en) 1990-11-22

Family

ID=16054682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17879080A Granted JPS57103513A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Country Status (1)

Country Link
JP (1) JPS57103513A (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
JPH0254570B2 (en) 1990-11-22

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