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JPS5739420A - Temperature controlling circuit - Google Patents

Temperature controlling circuit

Info

Publication number
JPS5739420A
JPS5739420A JP55115138A JP11513880A JPS5739420A JP S5739420 A JPS5739420 A JP S5739420A JP 55115138 A JP55115138 A JP 55115138A JP 11513880 A JP11513880 A JP 11513880A JP S5739420 A JPS5739420 A JP S5739420A
Authority
JP
Japan
Prior art keywords
peltier element
electric power
power source
output
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.)
Pending
Application number
JP55115138A
Other languages
Japanese (ja)
Inventor
Michitoshi Nakaya
Norio Murakami
Hiroyasu Sugiki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55115138A priority Critical patent/JPS5739420A/en
Publication of JPS5739420A publication Critical patent/JPS5739420A/en
Pending 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
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • 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
    • G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller

Landscapes

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

Abstract

PURPOSE:To simplify the circuit and also to realize a low electric power consumption, by constituting a Peltier element of a single unipolar electric power source. CONSTITUTION:Transistors TR1, TR2 and TR3, TR4 are connected to a Peltier element PT so as to cross to each other, and resistances R6, R7 for providing a potential difference across the Peltier element PT are inserted into the base circuit of the TR2 and TR4. Only a single electric power source +VP is used as an electric power source for the Peltier element. When a detection temperature of a thermistor TH is higher than a set temperature, an output of an operational amplifier OP1 becomes (+), an output of said amplifier OP2 becomes (-), the TR1 and TR2 are operated and the TR3 and TR4 are not operated, therefore, a current flowing to the Peltier element PT executes cooling in the direction as indicated with a white thick arrow, and also magnitude of the current is proportional to an output of the operational amplifier OP1, that is to say, the extent of a temperature variation from the set temperature. When the detection temperature of the thermistor TH becomes lower than the set temperature, a current in the direction as indicated with a black thick arrow flows to the Peltier element PT, and heating is executed.
JP55115138A 1980-08-20 1980-08-20 Temperature controlling circuit Pending JPS5739420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55115138A JPS5739420A (en) 1980-08-20 1980-08-20 Temperature controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55115138A JPS5739420A (en) 1980-08-20 1980-08-20 Temperature controlling circuit

Publications (1)

Publication Number Publication Date
JPS5739420A true JPS5739420A (en) 1982-03-04

Family

ID=14655220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55115138A Pending JPS5739420A (en) 1980-08-20 1980-08-20 Temperature controlling circuit

Country Status (1)

Country Link
JP (1) JPS5739420A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123471U (en) * 1985-01-21 1986-08-04
GB2382144B (en) * 2001-07-11 2005-10-26 Siemens Ag Improved magnetic resonance tomography appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123471U (en) * 1985-01-21 1986-08-04
GB2382144B (en) * 2001-07-11 2005-10-26 Siemens Ag Improved magnetic resonance tomography appliance

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