JPS57103514A - Liquid temperature controller - Google Patents

Liquid temperature controller

Info

Publication number
JPS57103514A
JPS57103514A JP17879180A JP17879180A JPS57103514A JP S57103514 A JPS57103514 A JP S57103514A JP 17879180 A JP17879180 A JP 17879180A JP 17879180 A JP17879180 A JP 17879180A JP S57103514 A JPS57103514 A JP S57103514A
Authority
JP
Japan
Prior art keywords
amplifier
electric power
timer
heater
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
JP17879180A
Other languages
Japanese (ja)
Other versions
JPH0254571B2 (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 JP17879180A priority Critical patent/JPS57103514A/en
Priority to US06/330,981 priority patent/US4467183A/en
Priority to DE19813150601 priority patent/DE3150601A1/en
Publication of JPS57103514A publication Critical patent/JPS57103514A/en
Publication of JPH0254571B2 publication Critical patent/JPH0254571B2/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, by changing concurrently both the electric power to be applied to a heater and its application time during the rise. CONSTITUTION:The output voltage of a temperature sensor 7 is low in case when the temperature of a liquid is slightly lower than a target level. Accordingly the voltage which is supplied to a timer 12 and an electric power amplifier 13 from a differential amplifier 9 is set at a low level. As a result, the active time of the timer 12 is short. At the same time, the output power of the amplifier 13 is small, and the electric power to be supplied to a heater 17 is set at a low level. When the temperature of liquid is very low compared with a target level, the outputs of the sensor 7 and the amplifier 9 are set at a high level. Accordingly the active time of the timer 12 is long, and the output power of the amplifier 13 is set to a high level. As a result, the electric power to be supplied to the heater 17 is increased.
JP17879180A 1980-12-19 1980-12-19 Liquid temperature controller Granted JPS57103514A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17879180A JPS57103514A (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
JP17879180A JPS57103514A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Publications (2)

Publication Number Publication Date
JPS57103514A true JPS57103514A (en) 1982-06-28
JPH0254571B2 JPH0254571B2 (en) 1990-11-22

Family

ID=16054701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17879180A Granted JPS57103514A (en) 1980-12-19 1980-12-19 Liquid temperature controller

Country Status (1)

Country Link
JP (1) JPS57103514A (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
JPH0254571B2 (en) 1990-11-22

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