ELECTRONIC CUT-OUT PREVENTING ELECTRIC AND/OR ELECTRICALLY CONTROLLED CONSUMERS FROM UNDESIRABLE TEMPERATURE CHANGES

Title:

ELECTRONIC CUT-OUT PREVENTING ELECTRIC AND/OR ELECTRICALLY CONTROLLED CONSUMERS FROM UNDESIRABLE TEMPERATURE CHANGES

Document Type and Number:

WIPO Patent Application WO/2000/054121

Kind Code:

A1

Abstract:

An electronic cut-out preventing electric and/or electrically controlled consumers from undesirable temperature changes, consists of a high interrupting-capacity switch (HICS), connected between the source (S) of electric power and the consumer (C), and connected to an evaluating circuit (EC) which is connected to a temperature picking-up circuit, particularly thermosensor (TS), connected to the consumer (C) in a thermally conductive way. Between the consumer (C) and the source (S) of electric power, there is connected a thermoregulator (TR).

Inventors:

DVORAK PAVEL (CZ)

Application Number:

PCT/CZ2000/000010

Publication Date:

September 14, 2000

Filing Date:

March 01, 2000

Export Citation:

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Assignee:

DVORAK PAVEL (CZ)

International Classes:

G05B9/02; G05D23/19; H02H3/06; H02H5/04; (IPC1-7): G05D23/19; G05B9/02

Foreign References:

DE3500854A1	1985-07-25
EP0308579A2	1989-03-29
US4677282A	1987-06-30

Attorney, Agent or Firm:

Forejt, Antonín (KAVC, Trída Politickych veznu 7 Praha 1, CZ)

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Claims:

aimsCl electroniccut-outpreventingelectricand/or1.An consumersfromundesirableelectricallycontrolled temperature bythefactthatitcharacterized ahighinterrupting-capacityswitch(HICS),consistsof asourceofelectricpower(S)andconnectedbetween a consumer connectedtoanevaluatingcircuitand isconnectedtoatemperaturepicking-up(EC)which athermosensor(TS),connectedtocircuit,particularly (C)inathermallyconductiveway.theconsumer 2.2.The asinclaim1,characterizedcut-ont bythatthehighinterrupting-capacityswitchfact (HICS)byatriac,thyristor,relay,contactorformed or selenoid. electroniccut-outasinclaim1and2.3.The thefactthatbetweentheconsumer(C)characterizedby and (S)ofelectricpower,thereisconnectedsource a(TR). electroniccut-outasinclaim1to3,4.The thefactthattheevaluationcircuit(EC),characterizedby the highinterrupting-capacity andthe(HICS) havecommonelectronicelements.thermoregulator(TR) 5. cut-outasinclaim1to4.electronic thefactthattheevaluationcircuit(EC).characterizedby thethermoregulator(TR)formacontrollingpossiblyeven amicroprocessorthermoregulator.algorithmof AMENDED CLAIMS

1.

[received by the International Bureau on 25 August 2000 (25.08.00); original claim 3 cancelled; original claim 1 amended; original claims 4 and 5 renumbered as claims 3 and 4; other claims unchanged (1 pages)] An electronic cutout preventig electric and/or electrically controlled consumers from undesirable temperature changes, characterized by the fact that it consists of a high interruptingcapacity switch (HICS), connected between a source of electric power (S) and a consumer (C), and connected to an evaluating circuit (EC) which is connected to a temperature pickingup circuit by one thermosensor (TS), connected to the consumer (C) in a thermally conductive way, and between the consumer (C) and the source (S) of electric power, there is connected a thermoregulator (TR) equipped by a high interruptingcapacity switch.

2.

_ The electronic cutout as in claim 1, characterized by the fact that the high interruptingcapacity switch (HICS) is formed by a triac, thyristor, relay, contactor or selenoid. 3The electronic cutout as in claim 1 to 2, characterized by the fact that the evaluation curcuit (EC), the high interruptingcapacity switch (HICS) and th thermoregulator (TR) have common elektronic elements. 4The electronic cutout as in claim 1 to 3, characterized by the fact that the evaluation circuit (EC), possibly even the thermoregulator (TR) form a controlling algorithm of a microprocessor thermoregulator.

Description:

preventingelectricand/orelectricallyElectroniccut-out fromundesirabletemperaturechanges.controlledconsumers TechnicalField The toanelectroniccut-outrelates and/orelectricallycontrolledpreventingelectric undesirabletemperaturechanges,suchasconsumersfrom plastics,electricboilers,cookers,weldersfor electricallycontrolledfurnaces,refrigerators,kettles, etc.electriciron, BackgroundArt To ofelectricand/orelectricallysafety therehavebeenhithertoappliedcontrolledconsumers, fuses,breakdownthermostats,lockingmechanicalthermal temperaturelimiterswhich,incaseofanthermostatsor oftemperature,stopthepowersupplyundesirablechange consumer.Inthisway,theconsumerispreventedtoa from damage which affects in a evenway the Thedrawbackofsuchasolutionresidesoperationsafety. in mentionedelementssecuringtheof causedbythermalcycleswhichresultinconsumersafety, easingofmechanicaliointsofsaidsafetyagradual furtherproblemisrepresentedbytoleranceselements.A temperaturesoffuses,causede.g.byofswitching-off metalsappliedinsafetyelements.Theageingof alsocausedbyliquidcomprisedinsomeunreliabilityis athermalfuseorofabreak-downthermostat.systemsof fusecan,inextremecases,switchoffprematurelySothe or notswitchoffatall.Saiddrawbacksaffectdoes ofthefuses,aswellasthesafetyofthereliability andofoperation.theconsumer Disclosure of Invention Thetheinventionisrepresentedbyanof preventingelectricand/orelectricallyelectroniccut-out fromundesirabletemperaturechangescontrolledconsumers totheinvention,consistsofahighwhich,according connectedbetweenasourceinterrupting-capacityswithc,

of electric power and a consumer, and connected to an evaluating circuit which is connected to a temperature particularlythermosensor,connectedpicking-upcircuit, to the consumer in a thermally conductive way. Between the consumer and the source of electric power there may be athermoregulator.Theevaluationadvantageouslyconnected circuit, the high interrupting-capacity switch and the have,advantageously,someelectricthermoregulatormay Theevaluationcircuitmaybeadvantageouslyelementscommon. formed by a controlling algorithm of a microprocessor temperaturecontroller-Thetemperaturecontrolleris inamicroprocessorembodiment.Theadvantageouslymade switchisadvantageouslyhighinterrupting-capacity anactiveswitchingelement,suchasatriac,representedby connectororselenoid.Atthyristor,relay, an undesirable detectofthecontrollerorsensor,temperaturechange, circuitdisconnectsvoltageforthehightheevaluation whichdisconnectsthesupplyinterrupting-capacityswitch, power(electriccurrent,gas,oil,andtheofelectric like) to the consumer. The consumer provided with the electronictotheinventionisreliable.acording anditcanworkwithinalargescopeofwithoutdefects, temperatures. forCarryingouttheInventionBestMode In theinventionisdescribedindescription, more details on a drawing where there is illustrated a ofanexemplarywiringoftheelectronicblockdiagram cut-out according to the invention.

The consistsofthehighcut-out HJCSandoftheevaluatinginterrupting-capacityswitch circuit EC. The consumer C is fed from the source S of BetweenthesourceSofelectricpowerandelectricpower.

C.theremaybeconnectedthethermoregulatortheconsumer TR. The thethermoregulatorTRisconnectedtoof thehighinterrupting-capacityswitchHICS.Ifthe isnotapplied,thehighinterrupting-thermoregulatorTR

HICSmaybeconnecteddirectlytothe-capacityswitch ofelectricpowerS.Thehighinterrupting-sourceS HICSisrepresentede.g.byatriac,-capacityswitch connectororselenoid.Totheoutputofthyristor,relay, interrupting-capacityswitchHICS,thereisthehigh connected the consumer S-The excitation of the high HICSisperformedfromtheinterrupting-capacityswitch EC.Theinputoftheevaluationcircuitevaluationcircuit E is connected to the thermal sensor TS which is also connectedtotheinputofthethermoregulatorTR-The andtheevaluationcircuitECmayhavethermoregulatorTR common,suchasmicroprocessor,integratedsomecomponents etc.circuit,resistor, Indus. Rppticability The accordingtotheinventiorcut-out may ne utilized in electric consumers or electrically controlied ones, such as in portable welders for welding ofplastics,electricirons,cookers,pipingmade refrigeratorsetc.

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