JPS5799412A - Air flow control circuit of air conditioner for car - Google Patents

Air flow control circuit of air conditioner for car

Info

Publication number
JPS5799412A
JPS5799412A JP55174512A JP17451280A JPS5799412A JP S5799412 A JPS5799412 A JP S5799412A JP 55174512 A JP55174512 A JP 55174512A JP 17451280 A JP17451280 A JP 17451280A JP S5799412 A JPS5799412 A JP S5799412A
Authority
JP
Japan
Prior art keywords
voltage
air flow
circuit
resistor
amplifier
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
JP55174512A
Other languages
Japanese (ja)
Other versions
JPS6218361B2 (en
Inventor
Yasuo Kanehata
Toshio Hayashibara
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55174512A priority Critical patent/JPS5799412A/en
Publication of JPS5799412A publication Critical patent/JPS5799412A/en
Publication of JPS6218361B2 publication Critical patent/JPS6218361B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00828—Ventilators, e.g. speed control

Abstract

PURPOSE:To prevent phase lag which is caused by the fluctuation of power supply voltage by using the voltage value in which the power supply voltage is divided as the control reference voltage in a circuit and making each resistivity of negative feedback signal and preset voltage sections equal to the said partial voltage ratio. CONSTITUTION:An air flow preset circuit 2 consisting of a resistor R and the OP amplifier A of an air flow control circuit 3 are connected to the output end of a constant voltage source 1 consisting of a resistor 5 and a zener diode ZD. The voltage Vr in which the power supply voltage VB is divided by resistors R1 and R2 is applied to the reverse input terminal of the OP amplifier A. On the other hand, resistors R3 and R4 are connected to a non-reverse input terminal. The R3 is connected to the air flow preset circuit 2 and the R4 to the collector of a power transistor Tr4. Moreover, a blower motor 5 is connected to the collector of the Tr4 and the output terminal of the OP amplifier A is connected to the base of the Tr4 through a resistor R6. By obtaining a circuit constant in which a relationship of R1/R2=R4/R3 is established, a desired purpose is achieved.
JP55174512A 1980-12-12 1980-12-12 Air flow control circuit of air conditioner for car Granted JPS5799412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55174512A JPS5799412A (en) 1980-12-12 1980-12-12 Air flow control circuit of air conditioner for car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55174512A JPS5799412A (en) 1980-12-12 1980-12-12 Air flow control circuit of air conditioner for car

Publications (2)

Publication Number Publication Date
JPS5799412A true JPS5799412A (en) 1982-06-21
JPS6218361B2 JPS6218361B2 (en) 1987-04-22

Family

ID=15979798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55174512A Granted JPS5799412A (en) 1980-12-12 1980-12-12 Air flow control circuit of air conditioner for car

Country Status (1)

Country Link
JP (1) JPS5799412A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189623A (en) * 1984-03-08 1985-09-27 Hitachi Ltd Air conditioner for automobile
JP2008130930A (en) * 2006-11-22 2008-06-05 Kobe Steel Ltd Drive current control circuit, and electromagnetic proportional valve control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159979A (en) * 1980-05-12 1981-12-09 Diesel Kiki Co Ltd Revolution controlling circuit for dc motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159979A (en) * 1980-05-12 1981-12-09 Diesel Kiki Co Ltd Revolution controlling circuit for dc motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189623A (en) * 1984-03-08 1985-09-27 Hitachi Ltd Air conditioner for automobile
JP2008130930A (en) * 2006-11-22 2008-06-05 Kobe Steel Ltd Drive current control circuit, and electromagnetic proportional valve control system

Also Published As

Publication number Publication date
JPS6218361B2 (en) 1987-04-22

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