GB1335983A - Temperature control system - Google Patents

Temperature control system

Info

Publication number
GB1335983A
GB1335983A GB3765270A GB3765270A GB1335983A GB 1335983 A GB1335983 A GB 1335983A GB 3765270 A GB3765270 A GB 3765270A GB 3765270 A GB3765270 A GB 3765270A GB 1335983 A GB1335983 A GB 1335983A
Authority
GB
United Kingdom
Prior art keywords
boilers
shaft
switches
motor
potentiometers
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.)
Expired
Application number
GB3765270A
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.)
Raypak Inc
Original Assignee
Raypak Inc
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 Raypak Inc filed Critical Raypak Inc
Publication of GB1335983A publication Critical patent/GB1335983A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • 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
    • 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
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F24D2200/043—More than one gas or oil fired boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/18—Flue gas recuperation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

1335983 Automatic control of temperature RAYPAK Inc 15 Sept 1970 [10 Nov 1969] 37652/70 Heading G3R In an automatic temperature control system (e.g. for a building) a plurality of gas-fired boilers B<SP>1</SP>-B<SP>4</SP> (Fig. 1), the outputs of which are arranged to feed a common heating water line 10, 12, are cumulatively added or subtracted to increase or decrease in steps the total heating output in dependence upon the output of a control unit RC including a bridge circuit in which are connected a thermistor T<SP>1</SP> responsive to boiler outlet temperature, a thermistor T<SP>2</SP> responsive to outdoor temperature and a control potentiometer. Respective gas valves V<SP>1</SP> to V<SP>4</SP> are operated sequentially each being first opened to a half-way position and then modulated automatically to smooth out the step increase or decrease so that the total heating output follows a heating load demand curve Fig. 2 (not shown) determined by outdoor temperature. A timer T (Fig. 3) operates a switch 40 to reverse every 36 hours the order in which the boilers are brought into operation, whereby to share operating time equally amongst the boilers. In Fig. 3, the control unit RC controls the angular position of the shaft of a motor MA coupled to a potentiometer which controls a motor MB whereby the shaft of motor MB follows the angular position of the motor MA shaft. The angular position of the shafts, is thus related to the heating demand signal from unit RC. The shaft of MA carries potentiometers AP1, AP2 and cams AC1, AC2 for operating switches S1, S2. The shaft of MB carries potentiometers BP3 BP4 and cams BC3, BC4 to operate switches S3, S4. The switches are connected to respective gas valves via a double throw relay SR-36. The pots are connected respecitvely to the valves via respective D.T. relays R1 to R4 for modulating the respective valve postions. OPERATION. When switch 40 is closed by timer T all the relay coils are energized so that depending upon which switches S1 to S4 are closed by the cams, the corresponding valves are opened, each initially to a "half-open" position which results in approximately half capacity output from the respective boiler; the respective valve control potentiometer e.g. AP2 having moved through half its range. The motors then drive the potentiometers in one or other direction to modulate the valve positions of all of the boilers which are operating until the total boiler output meets the demand. The cam switches are arranged to open at a different angular position of the motor shafts when taking boilers off load than when putting them on load. The sensors T1, T2 may alternatively be bulbs actuating bellows to move potentiometers. Alternatively the control arrangement may be applied to cooling units (not illustrated).
GB3765270A 1969-11-10 1970-09-15 Temperature control system Expired GB1335983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87503769A 1969-11-10 1969-11-10

Publications (1)

Publication Number Publication Date
GB1335983A true GB1335983A (en) 1973-10-31

Family

ID=25365083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3765270A Expired GB1335983A (en) 1969-11-10 1970-09-15 Temperature control system

Country Status (4)

Country Link
US (1) US3576177A (en)
DE (1) DE2055056C3 (en)
GB (1) GB1335983A (en)
NL (1) NL7016234A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431131A (en) * 1980-07-15 1984-02-14 Pyrox Limited Heating arrangements and control systems therefor
GB2154029A (en) * 1984-02-13 1985-08-29 Johnson Service Co Method of controlling a space heating system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421068A (en) * 1982-07-06 1983-12-20 Measurex Corporation Optimization of steam distribution
DE3406793A1 (en) * 1983-03-15 1984-11-22 Friedrich 7180 Crailsheim Müller Arrangement for the regulation and/or for the monitoring of the heat supply to a water heater and/or room heat generator
GB8318452D0 (en) * 1983-07-07 1983-08-10 Esg Controls Ltd Boiler cycling controller
US4864972A (en) * 1987-06-08 1989-09-12 Batey John E Boiler optimization for multiple boiler heating plants
JP2998573B2 (en) * 1994-09-02 2000-01-11 三浦工業株式会社 How to control the number of fluid heaters
US5775582A (en) * 1996-09-26 1998-07-07 Hammer; Jack Method and apparatus for regulating heater cycles to improve fuel efficiency
US20060062035A1 (en) * 2004-08-20 2006-03-23 Cutler Timothy J Systemizer control enclosure
US9863646B2 (en) 2007-01-26 2018-01-09 David E. Johnson, Jr. Modulation control of hydronic systems
US7658335B2 (en) * 2007-01-26 2010-02-09 Thermodynamic Process Control, Llc Hydronic heating system
US20080179416A1 (en) * 2007-01-26 2008-07-31 Johnson David E Modulation control of a hydronic heating system
US7506617B2 (en) * 2007-03-09 2009-03-24 Lochinvar Corporation Control system for modulating water heater
US8479689B2 (en) * 2008-07-10 2013-07-09 Heat-Timer Corporation Optimizing multiple boiler plant systems with mixed condensing and non-condensing boilers
US11619400B2 (en) * 2015-11-06 2023-04-04 Mestek, Inc. Networked boiler system and method
CA2975467C (en) * 2016-08-04 2020-11-10 Watershed Technologies Inc. System and method for building climate control

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168680A (en) * 1936-01-02 1939-08-08 Internat Engineering Corp Control system for heating plants
US2780206A (en) * 1953-06-23 1957-02-05 Vapor Heating Corp Multiple boiler control system
US3387589A (en) * 1966-09-12 1968-06-11 Vapor Corp Multiple boiler control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431131A (en) * 1980-07-15 1984-02-14 Pyrox Limited Heating arrangements and control systems therefor
GB2154029A (en) * 1984-02-13 1985-08-29 Johnson Service Co Method of controlling a space heating system
US4559441A (en) * 1984-02-13 1985-12-17 Johnson Service Company Method of controlling a space heating system

Also Published As

Publication number Publication date
US3576177A (en) 1971-04-27
DE2055056C3 (en) 1974-12-19
DE2055056B2 (en) 1974-04-25
NL7016234A (en) 1971-05-12
DE2055056A1 (en) 1971-06-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees