Iyini i-thermostat?
Izilawuli zamazinga okushisa zinamagama ahlukahlukene, njengokushintshwa kokulawula izinga lokushisa, izivikeli zokushisa nezilawuli zokushisa.Ngokomgomo wokusebenza, ingahlukaniswa nge-thermostat yohlobo lwe-jump, uhlobo lwe-liquid thermostat, uhlobo lwe-pressure thermostat kanye ne-electronic type thermostat.Emishinini yesimanje yokulawula izimboni, i-thermostat yedijithali iwuhlobo olusetshenziswa kakhulu.Ngokusho kwesakhiwo, isilawuli sokushisa singahlukaniswa sibe isilawuli sokushisa esihlanganisiwe nesilawuli sokushisa se-modular.
Ayini ama-thermometers?
Umzimba wokulinganisa izinga lokushisa uyingxenye eguqula isignali yezinga lokushisa ibe isignali kagesi, futhi ngokuvamile ifakwa engxenyeni etholwayo yento elawulwayo ukuze kuqashwe inani layo lokushisa.Emkhakheni wokulawulwa kwezimboni, ama-thermometers asetshenziswa ngokuvamile ahlanganisa ama-thermocouples, ama-thermal resistors, ama-thermistors kanye nezinzwa ezingaxhunywanga.Phakathi kwazo, ezintathu zokuqala ziyi-thermometers yokuxhumana.
1. Thermocouple
Isimiso sokulinganisa izinga lokushisa kwama-thermocouples sisekelwe kumphumela we-Seebeck (umphumela we-thermoelectric).Lapho izinsimbi ezimbili zezinto ezihlukene (imvamisa ama-conductor noma ama-semiconductors, njenge-platinum-rhodium, i-nickel-chromium-nickel-silicon nezinye izinto ezibhanqiwe) zakha iluphu evaliwe futhi zisebenzisa amazinga okushisa ahlukene emikhawulweni yazo emibili yokuxhuma, kukhiqizwa amandla e-electromotive phakathi kwawo. izinsimbi ezimbili.Iluphu enjalo ibizwa ngokuthi "i-thermocouple," kuyilapho izinsimbi ezimbili zibizwa ngokuthi "i-electrode eshisayo," futhi amandla e-electromotive avelayo abizwa ngokuthi "i-thermoelectric motitive force."Ama-Thermocouples abonakala ngebanga lawo lokushisa elibanzi lokulinganisa, ukuphendula okushisayo okusheshayo, nokumelana nokudlidliza okuqinile.
2. Ukumelana nokushisa
Ukumelana nokushisa kuyingxenye eguqula isignali yokushisa ibe isignali kagesi, futhi isimiso sayo sokusebenza sisekelwe ikakhulukazi ezicini zezinguquko zokumelana nensimbi nezinga lokushisa.Ngokukhethekile, ama-resistors ashisayo asebenzisa lesi sakhiwo sensimbi ukukala izinga lokushisa.
Ekulawuleni izimboni, izinhlobo ezivame ukusetshenziswa zokumelana nokushisa zihlanganisa iplatinum, ithusi ne-nickel.Phakathi kwabo, ukumelana ne-platinum yikhona okuvame kakhulu.Ukumelana nokushisa kunezici zokulinganisa okuhle kokushisa, ukusebenza okuzinzile nokunemba okuphezulu emkhakheni wokushisa okuvamile.Ngakho-ke, endaweni yesicelo sokushisa okumaphakathi, akukho ukudlidliza kanye nezidingo zokunemba okuphezulu, ukusetshenziswa kokumelana neplatinamu kuvame ukuthandwa.
3. Thermistor
I-thermistor iyingxenye eguqula isignali yezinga lokushisa ibe isignali kagesi, futhi isimiso sayo sokusebenza sisekelwe ikakhulukazi ezicini zokumelana ne-semiconductor ezishintshayo nezinga lokushisa.Ngokukhethekile, ama-thermistors asebenzisa leli thuba lama-semiconductors ukukala izinga lokushisa.Uma kuqhathaniswa nokumelana nokushisa, ukumelana kwe-thermistor kushintsha kakhulu ngokushintsha kwezinga lokushisa, ngakho-ke ububanzi bayo bokulinganisa izinga lokushisa buncane kakhulu (-50 ~ 350℃).
Ama-thermistors ahlukaniswe ama-thermistors e-NTC kanye nama-thermistors e-PTC.Ama-thermistors e-NTC ane-coefficient yezinga lokushisa elibi, futhi inani lazo lokumelana liyehla njengoba izinga lokushisa likhuphuka.I-thermistor ye-PTC ine-coefficient yezinga lokushisa elihle, futhi inani layo lokumelana lizokhula ngokunyuka kwezinga lokushisa.Ngenxa yezici zayo ezihlukile zokumelana nezinga lokushisa, i-thermistor inezinhlobonhlobo zezinhlelo zokusebenza ekutholeni izinga lokushisa, ukulawula okuzenzakalelayo, amadivaysi kagesi neminye imikhakha.
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