Lub ntsuas cua sov yog dab tsi?
Temperature controllers muaj ntau lub npe, xws li kev tswj qhov kub thiab txias, cov khoom tiv thaiv kub thiab kub tswj. Raws li txoj cai ua haujlwm, nws tuaj yeem muab faib ua dhia hom ntsuas kub, kua hom ntsuas kub, ntsuas kub hom ntsuas kub thiab hluav taws xob hom ntsuas kub. Hauv cov cuab yeej tswj kev lag luam niaj hnub no, cov ntsuas kub digital yog hom siv ntau tshaj plaws. Raws li cov qauv, tus tswj qhov kub thiab txias tuaj yeem muab faib ua kev sib xyaw ua ke ntawm qhov ntsuas kub thiab ntsuas qhov ntsuas kub.
Cov ntsuas kub yog dab tsi?
Qhov ntsuas kub ntawm lub cev yog ib qho khoom siv uas hloov cov teeb liab kub rau hauv lub teeb liab hluav taws xob, thiab feem ntau yog ntsia rau hauv qhov kev tshawb pom ntawm cov khoom tswj los saib xyuas nws cov nqi kub. Hauv kev tswj hwm kev lag luam, feem ntau siv cov ntsuas kub muaj xws li thermocouples, thermal resistors, thermistors thiab tsis sib cuag sensors. Ntawm lawv, thawj peb yog hu rau tus pas ntsuas kub.
1. Thermocouple
Lub hauv paus ntsiab lus ntawm kev ntsuas kub rau thermocouples yog ua raws li Seebeck effect (thermoelectric effect). Thaum ob hlau ntawm cov ntaub ntawv sib txawv (feem ntau yog cov conductors lossis semiconductors, xws li platinum-rhodium, nickel-chromium-nickel-silicon thiab lwm yam ntaub ntawv ua ke) tsim lub voj kaw thiab siv qhov kub sib txawv rau lawv ob qhov txuas kawg, lub zog hluav taws xob yog tsim los ntawm ob hlau. Xws li lub voj hu ua "thermocouple," thaum ob lub hlau hu ua "thermal electrode," thiab qhov tshwm sim electromotive quab yuam hu ua "thermoelectric motive force." Thermocouples yog tus cwj pwm los ntawm lawv qhov ntsuas kub ntau, ceev thermal teb, thiab muaj zog kev co kuj.
2. Thermal tsis kam
Thermal resistance yog ib qho khoom siv uas hloov cov teeb liab kub rau hauv lub teeb liab hluav taws xob, thiab nws txoj haujlwm ua haujlwm feem ntau yog raws li cov yam ntxwv ntawm cov hlau tsis kam hloov nrog kub. Tshwj xeeb, thermal resistors coj kom zoo dua ntawm cov cuab yeej no ntawm cov hlau los ntsuas qhov kub thiab txias.
Hauv kev tswj hwm kev lag luam, feem ntau siv hom thermal kuj muaj xws li platinum, tooj liab thiab npib tsib xee. Ntawm lawv, platinum tsis kam yog qhov ntau tshaj plaws. Lub thermal kuj muaj cov yam ntxwv ntawm zoo kub linearity, ruaj khov kev ua tau zoo thiab siab precision nyob rau hauv lub tshav kub ntawm ib txwm kub. Yog li ntawd, nyob rau hauv daim ntawv thov ib puag ncig ntawm qhov kub thiab txias, tsis muaj kev vibration thiab siab precision, kev siv platinum kuj yog feem ntau nyiam.
3. Thermistor
Lub thermistor yog ib qho khoom siv uas hloov cov teeb liab kub rau hauv lub teeb liab hluav taws xob, thiab nws txoj haujlwm ua haujlwm feem ntau yog raws li cov yam ntxwv ntawm cov khoom siv hluav taws xob hloov pauv nrog qhov kub thiab txias. Tshwj xeeb, thermistors coj kom zoo dua ntawm cov cuab yeej no ntawm semiconductors los ntsuas qhov kub thiab txias. Piv nrog rau cov thermal tsis kam, qhov kev tiv thaiv ntawm lub thermistor hloov tau zoo heev nrog kev hloov pauv ntawm qhov kub thiab txias, yog li nws qhov ntsuas kub ntawm qhov ntsuas kub yog qhov nqaim (-50 ~ 350 ℃).
Thermistor muab faib ua NTC thermistor thiab PTC thermistor. NTC thermistors muaj qhov tsis zoo ntawm qhov kub thiab txias, thiab lawv cov nqi kuj txo qis thaum kub nce. PTC thermistor muaj qhov zoo kub coefficient, thiab nws cov nqi kuj yuav nce nrog qhov kub thiab txias. Vim nws cov yam ntxwv ntawm qhov kub thiab txias tsis kam, thermistor muaj ntau yam kev siv hauv kev ntsuas kub, kev tswj tsis siv neeg, cov khoom siv hluav taws xob thiab lwm yam.
Zhuo Meng Shanghai Auto Co., Ltd. tau cog lus los muag MG & MAUXS tsheb qhov chaw txais tos yuav.
