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GB9325024D0 - Controlling ac current - Google Patents

Controlling ac current

Info

Publication number
GB9325024D0
GB9325024D0 GB939325024A GB9325024A GB9325024D0 GB 9325024 D0 GB9325024 D0 GB 9325024D0 GB 939325024 A GB939325024 A GB 939325024A GB 9325024 A GB9325024 A GB 9325024A GB 9325024 D0 GB9325024 D0 GB 9325024D0
Authority
GB
United Kingdom
Prior art keywords
controlling
current
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.)
Withdrawn
Application number
GB939325024A
Other versions
GB2274219A (en
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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
Priority claimed from GB939300359A external-priority patent/GB9300359D0/en
Priority claimed from GB939301215A external-priority patent/GB9301215D0/en
Application filed by Smiths Group PLC filed Critical Smiths Group PLC
Publication of GB9325024D0 publication Critical patent/GB9325024D0/en
Publication of GB2274219A publication Critical patent/GB2274219A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
    • 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
    • G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Control Of Resistance Heating (AREA)
GB9325024A 1993-01-09 1993-12-07 Power control for an electric heater Withdrawn GB2274219A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939300359A GB9300359D0 (en) 1993-01-09 1993-01-09 Controlling ac current
GB939301215A GB9301215D0 (en) 1993-01-22 1993-01-22 Controlling ac current

Publications (2)

Publication Number Publication Date
GB9325024D0 true GB9325024D0 (en) 1994-02-02
GB2274219A GB2274219A (en) 1994-07-13

Family

ID=26302279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9325024A Withdrawn GB2274219A (en) 1993-01-09 1993-12-07 Power control for an electric heater

Country Status (3)

Country Link
DE (1) DE4344404A1 (en)
FR (1) FR2700427A1 (en)
GB (1) GB2274219A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542531B (en) * 2012-07-12 2016-04-06 珠海格力电器股份有限公司 Electric heater with fan, control method and circuit thereof and household appliance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB593432A (en) * 1945-02-23 1947-10-16 Frederick Cecil Heayberd Improvements in and relating to the fine control of current and voltage in alternating current electric circuits
GB739045A (en) * 1951-06-08 1955-10-26 Thorn Electrical Ind Ltd Improvements in dimming circuits for electric discharge lamps
GB1097427A (en) * 1965-04-05 1968-01-03 Takao Kawabe Improvements in or relating to starters for alternating current motors
US3602788A (en) * 1969-11-13 1971-08-31 Takao Kawabe Multistage voltage regulating apparatus for alternating current machines
GB1525924A (en) * 1975-10-23 1978-09-27 Spall G Electrical controller
US4147962A (en) * 1977-12-19 1979-04-03 Westinghouse Electric Corp. Energy-conserving illumination system
WO1981002642A1 (en) * 1980-03-13 1981-09-17 Santoku Giken Kk Electric power control device

Also Published As

Publication number Publication date
GB2274219A (en) 1994-07-13
FR2700427A1 (en) 1994-07-13
DE4344404A1 (en) 1994-07-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)