JPS57120783A - Control of flow rate - Google Patents

Control of flow rate

Info

Publication number
JPS57120783A
JPS57120783A JP752281A JP752281A JPS57120783A JP S57120783 A JPS57120783 A JP S57120783A JP 752281 A JP752281 A JP 752281A JP 752281 A JP752281 A JP 752281A JP S57120783 A JPS57120783 A JP S57120783A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
output
comparator
difference
flow rate
pressure
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
JP752281A
Other versions
JPS626152B2 (en )
Inventor
Kentaro Inoue
Tadashi Kojima
Eiichi Morozumi
Michio Saeki
Original Assignee
Yamatake Honeywell 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

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1906Control of temperature characterised by the use of electric means using an analogue comparing device

Abstract

PURPOSE:To make up for a variation in pressure on the secondary side of a valve by controlling the opening degree of a flow rate control valve in such a way as to minimize the deviation between the pressure of a fluid to be controlled on the outlet pathway side and a set value. CONSTITUTION:A comparator 11 generates an output signal corresponding to the difference between a set value SP showing a desired temperature of hot water and the actual temperature of water inside a heat exchanger 9, detected by a temperature sensor 10, and then sends to a comparator 13 through a signal conversion circuit 12. In the comparator 13, the output of the circuit 12 is compared with the output signal of the sensor 6, and an output corresponding to the difference between them is sent to a drive circuit 14. In short, the output of the comparator 13 corresponds to the difference between the magnitude of heat requirement and the flow rate of fuel gas to be supplied to a burner 8. The drive circuit 14 supplies a drive signal corresponding to the output of the comparator 13 to an actuator 2 and controls the position of the valve body 1 in such a way that the output of the pressure sensor 6 becomes a value matching the magnitude of heat requirement.
JP752281A 1981-01-20 1981-01-20 Expired JPS626152B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP752281A JPS626152B2 (en) 1981-01-20 1981-01-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP752281A JPS626152B2 (en) 1981-01-20 1981-01-20

Publications (2)

Publication Number Publication Date
JPS57120783A true true JPS57120783A (en) 1982-07-27
JPS626152B2 JPS626152B2 (en) 1987-02-09

Family

ID=11668098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP752281A Expired JPS626152B2 (en) 1981-01-20 1981-01-20

Country Status (1)

Country Link
JP (1) JPS626152B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485400A (en) * 1989-10-02 1996-01-16 Rosemount Inc. Field-mounted control unit
ES2168179A1 (en) * 1999-07-23 2002-06-01 Fagor S Coop Flow regulating valve for gas heating apparatus.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57104076U (en) * 1980-12-18 1982-06-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57104076U (en) * 1980-12-18 1982-06-26

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485400A (en) * 1989-10-02 1996-01-16 Rosemount Inc. Field-mounted control unit
US5825664A (en) * 1989-10-02 1998-10-20 Rosemount Inc. Field-mounted control unit
ES2168179A1 (en) * 1999-07-23 2002-06-01 Fagor S Coop Flow regulating valve for gas heating apparatus.

Also Published As

Publication number Publication date Type
JPS626152B2 (en) 1987-02-09 grant

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