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GB2474238B - Improvements in and relating to thermostats - Google Patents

Improvements in and relating to thermostats

Info

Publication number
GB2474238B
GB2474238B GB0917454.1A GB0917454A GB2474238B GB 2474238 B GB2474238 B GB 2474238B GB 0917454 A GB0917454 A GB 0917454A GB 2474238 B GB2474238 B GB 2474238B
Authority
GB
United Kingdom
Prior art keywords
terminals
actuator
switches
thermostat
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.)
Expired - Fee Related
Application number
GB0917454.1A
Other versions
GB2474238A (en
GB0917454D0 (en
Inventor
Andrew Hunt
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.)
Heatrod Elements Ltd
Original Assignee
Heatrod Elements 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 Heatrod Elements Ltd filed Critical Heatrod Elements Ltd
Priority to GB0917454.1A priority Critical patent/GB2474238B/en
Publication of GB0917454D0 publication Critical patent/GB0917454D0/en
Priority to PCT/GB2010/051673 priority patent/WO2011042740A2/en
Priority to EP10773955A priority patent/EP2494572A2/en
Publication of GB2474238A publication Critical patent/GB2474238A/en
Application granted granted Critical
Publication of GB2474238B publication Critical patent/GB2474238B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • 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
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/006—Thermally-actuated switches with different switches operated at substantially different temperatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/22—Means for adjustment of "on" or "off" operating temperature by adjustment of a member transmitting motion from the thermal element to contacts or latch
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0216—Switches actuated by the expansion of a solid element, e.g. wire or rod
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
    • H05B1/0283—For heating of fluids, e.g. water heaters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Temperature (AREA)

Abstract

A thermostat has two separate switches operated by one differential expansion actuator, a thermostatic switch 4 for controlling the temperature of fluid such as water in a tank and a thermal cut-out switch 5 to turn off a heater if the thermostatic switch fails. An assembly comprising the switches is attached to the end of an elongate actuator 3 comprising actuator members having different thermal expansion coefficients, such as a tube 7 attached to a rod 8 at its distal end. Changes in temperature can cause relative movement of the actuator members 7,8 which act separately on the switches to change their state at different thresholds, The temperature threshold may be adjustable using dial 19 for the thermostatic switch, which can automatically reset while the cut-out switch may require manual reset using push pin 33. A four-terminal thermostat (fig 6) can be adapted to replace a two-terminal thermostat by an adaptor (fig 8,70) that short-circuits two of its terminals such as the element terminals, (fig 8, 53,54) , the power supply terminals (fig 9, 51,52) or pilot light terminals (fig 10, 63,64). The adaptor can be insulated hand have male or female connectors.
GB0917454.1A 2009-10-06 2009-10-06 Improvements in and relating to thermostats Expired - Fee Related GB2474238B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0917454.1A GB2474238B (en) 2009-10-06 2009-10-06 Improvements in and relating to thermostats
PCT/GB2010/051673 WO2011042740A2 (en) 2009-10-06 2010-10-06 Improvements in and relating to thermostats
EP10773955A EP2494572A2 (en) 2009-10-06 2010-10-06 Improvements in and relating to thermostats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0917454.1A GB2474238B (en) 2009-10-06 2009-10-06 Improvements in and relating to thermostats

Publications (3)

Publication Number Publication Date
GB0917454D0 GB0917454D0 (en) 2009-11-18
GB2474238A GB2474238A (en) 2011-04-13
GB2474238B true GB2474238B (en) 2013-12-04

Family

ID=41393891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0917454.1A Expired - Fee Related GB2474238B (en) 2009-10-06 2009-10-06 Improvements in and relating to thermostats

Country Status (3)

Country Link
EP (1) EP2494572A2 (en)
GB (1) GB2474238B (en)
WO (1) WO2011042740A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201518418D0 (en) * 2015-10-19 2015-12-02 Shel Nibe Mfg Co Ltd Thermostat with independent over-temperature actuation
CN111457579B (en) * 2020-05-14 2024-01-19 珠海格力电器股份有限公司 Water heater system and control method thereof
IT202200014128A1 (en) * 2022-07-04 2024-01-04 Termoregolatori Campini Corel S P A Rod thermostat with safety

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (en) * 1900-01-01 Improvements to built-in safety thermal adjustment devices
GB652067A (en) * 1948-07-19 1951-04-18 Kaspar Erwin Bader Improvements in or relating to electric heaters for typesetting and composing machines and the like
GB1277848A (en) * 1970-04-16 1972-06-14 Ranco Controls Ltd Thermostat
DE2343834A1 (en) * 1973-08-30 1975-04-10 Ego Elektro Blanc & Fischer Hot plate temperature limiter - has temperature sensitive element exposed to the heat of an electric hot-plate
GB2156157A (en) * 1984-03-16 1985-10-02 Emerson Electric Co Dual temperature thermostat
US20030146818A1 (en) * 2001-01-10 2003-08-07 Hans-Peter Morbitzer Temperature limiter
US20030192877A1 (en) * 2001-04-27 2003-10-16 Michael Danko Method and apparatus for mounting a heater thermostat and temperature sensitive fuse

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB784841A (en) * 1954-07-08 1957-10-16 Technicon Int Ltd Adjustable temperature control device
US3821683A (en) * 1973-04-17 1974-06-28 Gen Electric Thermal switch
SE419806B (en) * 1973-08-30 1981-08-24 Ego Elektro Blanc & Fischer ELECTRICAL SWITCH
US3967545A (en) * 1974-02-14 1976-07-06 John Baker Controlling the supply of electric current to a room
DE2748109C2 (en) * 1977-10-27 1982-04-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electric cooker
GB9003209D0 (en) * 1990-02-13 1990-04-11 Strix Ltd Hob control
FR2807155B1 (en) * 2000-03-30 2003-03-21 Giat Ind Sa PYROTECHNIC INITIATOR WHICH CAN BE EQUIPPED WITH AN ELECTRIC OR ELECTRONIC COMPONENT AND / OR A CONNECTOR
JP4314902B2 (en) * 2003-06-30 2009-08-19 住友電気工業株式会社 Burn-in method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (en) * 1900-01-01 Improvements to built-in safety thermal adjustment devices
GB652067A (en) * 1948-07-19 1951-04-18 Kaspar Erwin Bader Improvements in or relating to electric heaters for typesetting and composing machines and the like
GB1277848A (en) * 1970-04-16 1972-06-14 Ranco Controls Ltd Thermostat
DE2343834A1 (en) * 1973-08-30 1975-04-10 Ego Elektro Blanc & Fischer Hot plate temperature limiter - has temperature sensitive element exposed to the heat of an electric hot-plate
GB2156157A (en) * 1984-03-16 1985-10-02 Emerson Electric Co Dual temperature thermostat
US20030146818A1 (en) * 2001-01-10 2003-08-07 Hans-Peter Morbitzer Temperature limiter
US20030192877A1 (en) * 2001-04-27 2003-10-16 Michael Danko Method and apparatus for mounting a heater thermostat and temperature sensitive fuse

Also Published As

Publication number Publication date
WO2011042740A3 (en) 2011-06-16
GB2474238A (en) 2011-04-13
EP2494572A2 (en) 2012-09-05
WO2011042740A2 (en) 2011-04-14
GB0917454D0 (en) 2009-11-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140304