Yintoni ithermostat?
Abalawuli bobushushu banamagama ahlukeneyo, afana nokutshintsha kokulawula ubushushu, izikhuseli zobushushu kunye nezilawuli zobushushu.Ngokomgaqo wokusebenza, inokohlulwa ibe yi-thermostat yohlobo lokutsiba, uhlobo lolwelo lwe-thermostat, uhlobo loxinzelelo lwe-thermostat kunye nohlobo lwe-electronic thermostat.Kwizixhobo zanamhlanje zolawulo lwemizi-mveliso, i-digital thermostat lolona hlobo lusetyenziswa kakhulu.Ngokwesakhiwo, umlawuli weqondo lokushisa unokwahlulwa ube ngumlawuli wokushisa odibeneyo kunye nomlawuli wokushisa wemodyuli.
Ziziphi iithemomitha?
Umzimba wokulinganisa ubushushu licandelo eliguqula isignali yeqondo lokushisa ibe ngumqondiso wombane, kwaye ngokuqhelekileyo ifakwe kwindawo yokufumanisa into elawulwayo ukujonga ixabiso layo lokushisa.Kwinkalo yolawulo lwamashishini, i-thermometers esetyenziswa ngokuqhelekileyo ibandakanya i-thermocouples, i-resistors ye-thermal, i-thermistors kunye ne-non-contact sensors.Phakathi kwabo, ezintathu zokuqala zi-thermometers zoqhagamshelwano.
1. Thermocouple
Umgaqo womlinganiselo wokushisa we-thermocouples usekelwe kwi-Seebeck effect (impembelelo ye-thermoelectric).Xa iintsimbi ezimbini zezixhobo ezahlukeneyo (ngokuqhelekileyo ii-conductor okanye i-semiconductors, njenge-platinum-rhodium, i-nickel-chromium-nickel-silicon kunye nezinye izinto ezidityanisiweyo) zenza i-loop evaliweyo kwaye zisebenzisa amaqondo okushisa ahlukeneyo kwiziphelo zabo ezimbini zokuxhuma, i-electromotive force yenziwa phakathi. iintsimbi ezimbini.I-loop enjalo ibizwa ngokuba yi "thermocouple," ngelixa iintsimbi ezimbini zibizwa ngokuthi "i-electrode ye-thermal," kwaye i-electromotive force ebizwa ngokuba yi "thermoelectric motitive force".Ii-Thermocouples ziphawulwa ngoluhlu lwazo lokulinganisa olubanzi lobushushu, impendulo ekhawulezayo ye-thermal, kunye nokuxhathisa okunamandla kokungcangcazela.
2. Ukumelana nobushushu
Ukumelana ne-thermal licandelo eliguqula umqondiso wokushisa ube ngumqondiso wombane, kwaye umgaqo wayo wokusebenza usekelwe ngokukodwa kwiimpawu zokutshintsha kwetsimbi kunye nobushushu.Ngokukodwa, abaxhathisi be-thermal basebenzisa le propati yesinyithi ukulinganisa ubushushu.
Kulawulo lwamashishini, iintlobo ezisetyenziswa ngokuqhelekileyo zokumelana nokushisa ziquka iplatinum, ithusi kunye ne-nickel.Phakathi kwabo, ukuxhathisa iplatinam yeyona nto ixhaphakileyo.Ukuxhatshazwa kwe-thermal kuneempawu zokuhambelana kakuhle kweqondo lokushisa, ukusebenza okuzinzile kunye nokuchaneka okuphezulu kwintsimi yokushisa okuqhelekileyo.Ngoko ke, kwindawo yokusetyenziswa kweqondo lokushisa eliphakathi, akukho vibration kunye neemfuno ezichanekileyo ezichanekileyo, ukusetyenziswa kokumelana neplatinamu ngokuqhelekileyo kukhethwa.
3. Thermistor
I-thermistor licandelo eliguqula umqondiso weqondo lokushisa libe ngumqondiso wombane, kwaye umgaqo wayo wokusebenza usekelwe ikakhulu kwiimpawu zokuchasana kwe-semiconductor ukutshintsha kunye nobushushu.Ngokukodwa, i-thermistors ithatha ithuba le propati yee-semiconductors ukulinganisa ubushushu.Xa kuthelekiswa nokumelana ne-thermal, ukuxhathisa kwe-thermistor kutshintsha kakhulu kunye nokutshintsha kweqondo lokushisa, ngoko ke uluhlu lokulinganisa ubushushu buncinci (-50 ~ 350 ℃).
Izifudumezi zohlulwe ngokwezifudumezi ze-NTC kunye ne-PTC thermistors.I-thermistors ye-NTC ine-coefficient yeqondo lokushisa elibi, kwaye ixabiso labo lokumelana liyancipha njengoko ubushushu bukhula.I-thermistor ye-PTC ine-coefficient yokushisa efanelekileyo, kwaye ixabiso layo lokumelana liya kunyuka ngokunyuka kweqondo lokushisa.Ngenxa yeempawu zayo ezikhethekileyo zokumelana nobushushu, i-thermistor inoluhlu olubanzi lwezicelo ekufumaneni ubushushu, ulawulo oluzenzekelayo, izixhobo zombane kunye nezinye iindawo.
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