Introduction
Theso-calledliquidheaterusesbenzoicacidasaheatingreagentheater.Thecladdinglayerandtheresistancewirestrandedwireinthecenterformanintegraltypeofdirectheatingmonomerthatcanbebentatwillandcanbeinclosecontactwiththeheatedobject.Theheatingmonomerisrepeatedlyformedbywindingandwindingaccordingtotheshapeandsizeoftheheatedobject.Withasheetshape,multipleparallelmonomersarewoventogetherhorizontallywithmetalwirestoformabraidedhightemperatureelectricheaterthatcanbedirectlywrappedontheobjecttobeheated.
Workingprincipleh2>
Theworkingprincipleistoinstallaprimarycoilwithalargenumberofturnsandasecondarycoilwithasmallnumberofturnsonthesameironcore.Theratioofinputtooutputvoltageisequaltotheratioofthenumberofturnsofthecoil,whiletheenergyremainsthesame.Therefore,thesecondarycoilgeneratesalargecurrentunderlowvoltageconditions.Forinductionheaters,thebearingisashort-circuitedsingle-turnsecondarycoilthatpassesalargecurrentundertheconditionofalowerACvoltage,thusgeneratingalotofheat.Theheateritselfandtheyokearekeptatroomtemperature.Sincethisheatingmethodcaninducecurrent,thebearingwillbemagnetized.Itisimportanttoensurethatthebearingisdemagnetizedinthefuturesothatitwillnotattractmetalmagneticchipsduringoperation.FAGinductionheatershaveautomaticdemagnetizationfunction.
Itistheuseofmetaltogenerateeddycurrentinanalternatingmagneticfieldtomakeitselfheat,whichisusuallyusedinmetalheattreatment.Theprincipleisthatwhenthickermetalisinanalternatingmagneticfield,currentwillbegeneratedduetoelectromagneticinduction.Whenthethickermetalgeneratescurrent,thecurrentwillformaspiralflowpathinsidethemetal,sothattheheatgeneratedbythecurrentflowisabsorbedbythemetalitself,whichwillcausethemetaltoquicklyheatup.
Precautionsforuse
1.Thesize"B"oftheliquidheaterintheoutlinedimensiondrawingmustbecompletelyimmersedinoiltoavoidburningthecomponents.Theheatedoilshouldbenon-corrosive.
2.TheworkingfluidlevelofSRY3typemustbebelowthefastenerandabovethedimensionline"B".
3.Whenmeltingbitumen,paraffinandothersolidoils,thevoltageshouldbeloweredforuse,andthenraisedtotheratedvoltageaftermelting.Inordertopreventthepowerconcentrationfromreducingtheservicelifeofthecomponents.
4.Whenitisfoundthatthereiscarbononthesurfaceofthetube,itmustberemovedbeforeuse,soasnottoreducetheefficiencyorevenburnoutthecomponents.
5.Thecomponentsshouldbestoredoutofdryness.Iftheinsulationresistancedropsbelow1megohmduetolong-termstorage,theycanbedriedinanovenatabout200°Cforseveralhours(orpassthecomponentthroughseveralHours),orrestoretheinsulationresistance.