JPS57103511A - Liquid temperature controller - Google Patents

Liquid temperature controller

Info

Publication number
JPS57103511A
JPS57103511A JP17878880A JP17878880A JPS57103511A JP S57103511 A JPS57103511 A JP S57103511A JP 17878880 A JP17878880 A JP 17878880A JP 17878880 A JP17878880 A JP 17878880A JP S57103511 A JPS57103511 A JP S57103511A
Authority
JP
Japan
Prior art keywords
circuit
supplied
output
electric power
output voltage
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
JP17878880A
Other languages
Japanese (ja)
Other versions
JPH0254568B2 (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 JP17878880A priority Critical patent/JPS57103511A/en
Priority to US06/330,981 priority patent/US4467183A/en
Priority to DE19813150601 priority patent/DE3150601A1/en
Publication of JPS57103511A publication Critical patent/JPS57103511A/en
Publication of JPH0254568B2 publication Critical patent/JPH0254568B2/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 eliminate the thermal overshoot which is caused by the rise control of the fluid temperature, by supplying the electric power required for the rise to a heater by changing the electric power and the time of application of the electric power. CONSTITUTION:The temperature of a liquid is detected by temperature sensors 7 and 8, and this output voltage is compared by differential amplifiers 9 and 10 with the reference voltage corresponding to a target temperature given from a reference setting power supply 11. The difference of voltage is added through an adder circuit 12, and the output of addition is supplied to an electric power amplifier 13. Then the electric power corresponding to the output voltage of the circuit 12 is supplied to an output circuit 14. At the same time, the output voltage of the circuit 12 is supplied to a timer 15, and the output of the timer 15 is made active for the time corresponding to the output voltage of the circuit 12. The electric power supplied from the amplifier 13 is supplied to a heater 18 through the circuit 14 while the timer 15 is active. On the other hand, the output voltage of a differential amplifier 10 is supplied to an output circuit 16. The output of the circuit 16 is supplied to the heater 18 via a reverse current preventing diode 17 to perform the control.
JP17878880A 1980-12-19 1980-12-19 Liquid temperature controller Granted JPS57103511A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17878880A JPS57103511A (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
JP17878880A JPS57103511A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Publications (2)

Publication Number Publication Date
JPS57103511A true JPS57103511A (en) 1982-06-28
JPH0254568B2 JPH0254568B2 (en) 1990-11-22

Family

ID=16054643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17878880A Granted JPS57103511A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Country Status (1)

Country Link
JP (1) JPS57103511A (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
JPH0254568B2 (en) 1990-11-22

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