Technical articleCov kev daws rau qhov kub thiab txias ntawm kev tswj ntawm qhov kub thiab txias hluav taws xob soldering hlau
Qhov kub thiab txias tsis tu ncua hluav taws xob soldering hlau txais siab Curie kub sawb-zoo li PTC qhov kub thiab txias cua sov lub caij nyob rau hauv, thiab yog nruab nrog ib tug fastening tshav kub conduction qauv. Cov yam ntxwv yog tias nws yog superior rau cov tsoos cua sov hlau soldering hlau core, nrog ceev cua sov, lub zog txuag, txhim khu kev qha lag luam, lub neej ntev thiab tus nqi qis. Nws tuaj yeem siv rau hauv thaj chaw nrog lub zog qis PTC cua sov tub ntxhais, uas yooj yim rau kev saib xyuas haujlwm.
Kev daws rau qhov kub thiab txias tawm ntawm kev tswj ntawm qhov kub thiab txias hluav taws xob soldering hlau
Ib qho tsis ua hauj lwm nrog cov thermostatic soldering hlau yog qhov kub thiab txias, uas ua rau overheating ntawm cov hlau soldering. Ntawm qhov tod tes, nws ua rau kub-kub oxidation ntawm soldering hlau taub (lub solder kuj oxidized tib lub sij hawm); ntawm qhov tod tes, soldering ntawm qhov kub thiab txias kuj yog ib qho yooj yim rau hlawv tawm hluav taws xob Cheebtsam. Thaum cov hluav taws xob soldering hlau ua haujlwm ntawm qhov kub siab ntev ntev, nws kuj yog ib qho yooj yim los ua kev puas tsuaj rau nws cov hluav taws xob sab hauv, ua rau tsis muaj kev tswj xyuas tas li lossis txawm tias siv tsis tau. Thaum lub sij hawm soj ntsuam txhaum, nws yuav pom tias zawv zawg sib cuag ntawm qhov kub thiab txias hloov resistor R2 (Daim duab 1) yog oxidized thiab muaj kev sib cuag tsis zoo, uas yog sib npaug rau qhov kub thiab txias tau hloov mus rau qhov siab tshaj plaws, yog li qhov kub ntawm cov soldering. hlau siab dhau lawm. Muaj ob qho laj thawj tseem ceeb: ib qho yog tias thaum lub tshuab hluav taws xob hluav taws xob ua haujlwm, ib feem ntawm cov cua sov tau xa mus rau tus tuav ntawm cov hlau soldering (built-in circuit), uas ua rau qhov kub thiab txias ntawm qhov chaw ua haujlwm. Tom qab ib lub sij hawm, nws yog ib qho yooj yim uas yuav ua rau lub movable hu rau R2 oxidize; Qhov thib ob yog qhov tam sim no-limiting resistor R1 (Daim duab 2) nyob rau hauv lub rectifier lim Circuit Court dissipates thiab dissipates tshav kub, uas ua rau qhov kub thiab txias ntawm qhov chaw ua hauj lwm ntawm lub Circuit Court nce thiab yooj yim ua rau lub movable hu rau R2 oxidize.
Txhawm rau tiv thaiv qhov tshwm sim ntawm qhov tsis ua haujlwm zoo li no, ob txoj hauv kev hauv qab no ntawm kev hloov kho lub voj voog raug npaj rau kev siv.
(1) Hloov kho qhov hloov kho R2 nrog lub zog ruaj khov: ua ntej kho R2 kom qhov kub ntawm cov hlau soldering ncav cuag qhov ntsuas kub zoo rau kev siv ib txwm, tom qab ntawd ntsuas tus nqi ntawm R2 thiab hloov nws nrog ib qho ruaj khov resistor.
(2) Kev hloov pauv ntawm lub voj voog rectifier: cov qauv hauv Circuit Court yog qhia hauv daim duab 3.
Hloov R1 nrog C (C≈0.12μF), thiab txuas lub diode D1 nyob rau tib lub sijhawm.
