DC Cartridge rhaub ua haujlwm li cas? Kauj ruam-los ntawm-Kev Ua Haujlwm thiab Mechanism

Kev nkag siab txog kev ua haujlwm ntawm DC cartridge rhaub yuav tsum tau rhuav tshem nws cov khoom thiab cov txheej txheem ntawm lub cev uas hloov hluav taws xob hluav taws xob rau hauv cov cua sov siv tau. Ntawm nws cov tub ntxhais, DC cartridge rhaub ua haujlwm ntawm Joule cua sov txoj cai, qhov tshwm sim tseem ceeb uas cov hluav taws xob tam sim no dhau los ntawm cov khoom siv tiv thaiv, ua kom muaj cua sov vim cov khoom tsis sib haum xeeb rau qhov ntws ntawm electrons ⚡. Tsis zoo li AC cartridge rhaub, uas tso siab rau qhov hloov pauv tam sim no (qhov twg cov kev taw qhia ntawm cov dej ntws hloov pauv ib ntus), DC cartridge rhaub siv tam sim no ncaj qha -tam sim no uas ntws hauv ib qho, qhov kev taw qhia tsis tu ncua- ua rau cov khoom siv hluav taws xob ruaj khov.

Kev ua haujlwm ntawm DC cartridge rhaub tuaj yeem muab faib ua plaub kauj ruam tseem ceeb, txhua qhov tseem ceeb rau nws qhov kev ua tau zoo. Ua ntej, DC fais fab mov (xws li lub roj teeb, lub hnub ci vaj huam sib luag, lossis DC lub zog hloov hluav taws xob) xa cov hluav taws xob tsis tu ncua mus rau cov hlau lead ntawm DC cartridge rhaub. Cov hlau lead, uas yog insulated los tiv thaiv hluav taws xob to, xa cov tam sim no mus rau lub resistive cua sov nyob rau hauv lub hlau sheath. Cov khoom cua sov-feem ntau yog cov hlau coiled ua los ntawm npib tsib xee-chromium (Ni-Cr) lossis hlau-chromium (Fe-Cr) alloy- yog tsim los kom muaj kev tiv thaiv tshwj xeeb, uas txiav txim siab cov cua sov tsim tawm 🧵.

Thib ob, raws li DC tam sim no dhau los ntawm cov khoom tiv thaiv, cov electrons nyob rau hauv tam sim no sib tsoo nrog cov atom ntawm cov cua sov, hloov hluav taws xob rau hauv thermal zog. Cov txheej txheem no yog hu ua Joule cua sov, thiab tus nqi ntawm cov cua sov tsim tawm ( ntsuas hauv watts) yog suav nrog cov qauv P=I²R, qhov twg P yog lub zog, Kuv yog tam sim no, thiab R yog qhov tsis kam. DC cartridge rhaub tus qauv tsim kom ntseeg tau tias cov cua sov no yog nyob rau hauv lub cylindrical sheath, txo qis kub poob thiab ua kom muaj txiaj ntsig zoo 🔢.

Qhov thib peb, qhov siab -kub magnesium oxide (MgO) hmoov uas nyob ib puag ncig cov cua sov ua si ob lub luag haujlwm tseem ceeb: nws insulates lub cua sov los ntawm cov hlau sheath (tiv thaiv hluav taws xob luv luv Circuit Court) thiab ua cov hluav taws xob tsim hluav taws xob rau hauv lub plhaub. MgO hmoov yog compacted thaum lub sij hawm tsim cov txheej txheem los xyuas kom meej qhov siab tshaj plaws thermal conductivity thiab hluav taws xob rwb thaiv tsev - qhov compaction no kuj pab kom ruaj khov lub cua sov nyob rau hauv nruab nrab ntawm lub sheath, tiv thaiv nws los ntawm kov cov phab ntsa thiab ua rau overheating los yog puas 🛡️.

Plaub, cov hlau sheath ntawm DC cartridge rhaub hloov cov cua sov mus rau lub hom phiaj nruab nrab. Qhov kev hloov pauv no tshwm sim los ntawm peb lub tswv yim: conduction (kev sib cuag ncaj qha nrog qhov nruab nrab, xws li pwm lossis kua), convection (kub hloov mus rau huab cua los yog kua ntws nyob ib ncig ntawm lub sheath), thiab hluav taws xob (kub tawm raws li infrared nthwv dej). Qhov ua tau zoo ntawm qhov hloov hluav taws xob no yog nyob ntawm cov khoom xws li cov ntaub qhwv (stainless steel muaj thermal conductivity), qhov chaw ntim ntawm DC cartridge rhaub, thiab cov khoom ntawm lub hom phiaj nruab nrab (piv txwv li, kua ua kom sov zoo dua huab cua) 🌬️.

Txhawm rau kom muaj kev ua tau zoo thiab kev nyab xeeb, ntau lub tshuab hluav taws xob DC tau nruab nrog cov yam ntxwv ntxiv, xws li ua tau -hauv cov thermocouples lossis thermistors. Cov khoom no saib xyuas qhov ntsuas kub ntawm lub rhaub thiab xa cov teeb liab mus rau tus maub los, uas kho cov khoom siv hluav taws xob DC kom tswj tau qhov kub ntawm qhov xav tau. Qhov kaw no - lub voj tswj lub voj voog tiv thaiv kom tsis txhob muaj cua sov thiab ua kom cov khoom siv hluav taws xob zoo ib yam, ua rau DC cartridge rhaub kom haum rau cov ntawv thov uas qhov tseeb yog qhov tseem ceeb, xws li cov cuab yeej kho mob lossis kev sim kuaj 📊.