Lub ntsuas kub yog dab tsi?
Cov tswj kub muaj ntau lub npe, xws li cov hloov tswj kub, cov tiv thaiv kub thiab cov tswj kub. Raws li lub hauv paus ntsiab lus ua haujlwm, nws tuaj yeem muab faib ua hom dhia thermostat, hom kua thermostat, hom siab thermostat thiab hom hluav taws xob thermostat. Hauv cov khoom siv tswj kev lag luam niaj hnub no, digital thermostat yog hom siv ntau tshaj plaws. Raws li cov qauv, cov tswj kub tuaj yeem muab faib ua kev sib xyaw ua ke tswj kub thiab modular tswj kub.
Cov thermometers yog dab tsi?
Lub cev ntsuas kub yog ib qho khoom uas hloov lub teeb liab kub mus rau hauv lub teeb liab hluav taws xob, thiab feem ntau yog ntsia rau hauv qhov chaw ntes ntawm cov khoom tswj hwm los saib xyuas nws qhov kub. Hauv kev tswj hwm kev lag luam, cov ntsuas kub feem ntau siv suav nrog thermocouples, thermal resistors, thermistors thiab cov sensors tsis sib cuag. Ntawm lawv, thawj peb yog cov ntsuas kub sib cuag.
1. Lub ntsuas kub
Lub hauv paus ntsiab lus ntawm kev ntsuas kub rau cov thermocouples yog raws li Seebeck effect (thermoelectric effect). Thaum ob lub hlau ntawm cov khoom sib txawv (feem ntau yog cov conductors lossis semiconductors, xws li platinum-rhodium, nickel-chromium-nickel-silicon thiab lwm yam khoom sib koom ua ke) tsim ib lub voj voog kaw thiab siv cov kub sib txawv rau lawv ob qhov kawg txuas, lub zog electromotive raug tsim ntawm ob lub hlau. Lub voj voog zoo li no hu ua "thermocouple," thaum ob lub hlau hu ua "thermal electrode," thiab lub zog electromotive tshwm sim hu ua "thermoelectric motive force." Cov thermocouples tau piav qhia los ntawm lawv qhov ntsuas kub dav, teb sai sai, thiab tiv taus kev co.
2. Kev tiv thaiv thermal
Kev tiv thaiv kub yog ib qho khoom uas hloov lub teeb liab kub mus rau hauv lub teeb liab hluav taws xob, thiab nws txoj haujlwm ua haujlwm feem ntau yog raws li cov yam ntxwv ntawm kev hloov pauv ntawm cov hlau tiv thaiv nrog qhov kub. Tshwj xeeb, cov thermal resistors siv qhov zoo ntawm cov hlau no los ntsuas qhov kub.
Hauv kev tswj kev lag luam, cov hom kev tiv thaiv thermal feem ntau siv suav nrog platinum, tooj liab thiab nickel. Ntawm lawv, platinum tsis kam yog qhov feem ntau. Qhov kev tiv thaiv thermal muaj cov yam ntxwv ntawm qhov kub zoo, kev ua haujlwm ruaj khov thiab kev ua haujlwm siab hauv thaj chaw kub ib txwm. Yog li ntawd, nyob rau hauv qhov chaw siv ntawm qhov kub nruab nrab, tsis muaj kev co thiab qhov yuav tsum tau ua haujlwm siab, kev siv platinum tsis kam feem ntau yog qhov nyiam.
3. Lub ntsuas kub
Lub thermistor yog ib qho khoom siv uas hloov lub teeb liab kub mus ua lub teeb liab hluav taws xob, thiab nws txoj haujlwm ua haujlwm feem ntau yog raws li cov yam ntxwv ntawm qhov tsis kam ntawm lub semiconductor hloov pauv nrog qhov kub. Tshwj xeeb, cov thermistors siv qhov khoom no ntawm semiconductors los ntsuas qhov kub. Piv nrog rau qhov tsis kam thermal, qhov tsis kam ntawm thermistor hloov pauv ntau heev nrog qhov kub hloov pauv, yog li nws qhov ntsuas kub yog qhov nqaim heev (-50 ~ 350 ℃).
Cov thermistors raug muab faib ua NTC thermistors thiab PTC thermistors. NTC thermistors muaj qhov kub thiab txias tsis zoo, thiab lawv tus nqi tsis kam txo qis thaum qhov kub nce. PTC thermistor muaj qhov kub thiab txias zoo, thiab nws tus nqi tsis kam yuav nce nrog qhov kub nce. Vim nws cov yam ntxwv kub tsis kam tshwj xeeb, thermistor muaj ntau yam kev siv hauv kev kuaj kub, kev tswj tsis siv neeg, cov khoom siv hluav taws xob thiab lwm yam teb.
Zhuo Meng Shanghai Auto Co., Ltd. tau cog lus tias yuav muag MG&MAUXS cov khoom siv tsheb.
