IiThermitors eziNtathu zahlulwe ngoHlobo loBuqondo

Izifudumezi zibandakanya i-coefficient yobushushu evumayo (PTC) kunye ne-negative temperature coefficient (NTC) thermistors, kunye ne-critical thermistors (CTRS).

1.PTC thermistor

I-Positive Temperature CoeffiCient (PTC) yi-thermistor phenomenon okanye izinto ezinomlinganiso wokushisa ofanelekileyo kunye nokunyuka okubukhali ekuchaseni kwiqondo elithile. Ingasetyenziswa njengenzwa yeqondo lokushisa rhoqo. Izinto eziphathekayo ngumzimba we-sintered kunye ne-BaTiO3, i-SrTiO3 okanye i-PbTiO3 njengenxalenye ephambili, kwaye yongeza i-oxides ye-Mn, Fe, Cu kunye ne-Cr eyandisa i-coefficient yokumelana nokushisa okufanelekileyo kunye nezinye izongezo ezidlala ezinye iindima. Izinto eziphathekayo zenziwe ngenkqubo ye-ceramic eqhelekileyo kunye ne-sintered kwiqondo lokushisa eliphezulu ukwenza i-platinum titanate kunye nesisombululo sayo esiqinileyo se-semi-conductive. Ngaloo ndlela izixhobo ze-thermistor ezineempawu ezintle zifunyenwe. I-coefficient yeqondo lokushisa kunye neqondo lokushisa le-Curie liyahluka ngokubunjwa kunye neemeko ze-sintering (ingakumbi iqondo lokupholisa).

I-PTC thermistor yavela ngenkulungwane yama-20, i-thermistor ye-PTC ingasetyenziselwa ukulinganisa ubushushu kunye nokulawula kwishishini, ikwasetyenziselwa ukubonwa kobushushu kunye nolawulo lwenxalenye yemoto, kodwa kunye nenani elikhulu lezixhobo zoluntu, ezinjengolawulo lwemoto. Ubushushu bamanzi obukhawulezayo bamanzi, i-air conditioner kunye nobushushu bokugcina obubandayo, ukusetyenziswa kokufudumeza kwayo ukuhlalutya kwegesi kunye ne-anemometer kunye neminye imiba.

I-PCT thermistor inomsebenzi wokugcina ubushushu kuluhlu oluthile, kwaye iphinda idlale indima yokutshintsha. Ukusebenzisa le mpawu yokumelana nokushisa njengomthombo wokufudumeza, inokudlala indima yokukhusela ukufudumala kwezixhobo zombane.

2.NTC thermistor

I-Negative Temperature CoeffiCient (NTC) ibhekisa kwisenzeko se-thermistor kunye nemathiriyeli enomlinganiso wobushushu ombi kuba ukuxhathisa kuncipha ngokukhawuleza njengoko ubushushu bunyuka. Izinto eziphathekayo yi-ceramic ye-semiconducting eyenziwe ngee-oxide zetsimbi ezimbini okanye ngaphezulu ezifana ne-manganese, ubhedu, i-silicon, i-cobalt, isinyithi, i-nickel, kunye ne-zinc, ezixutywe ngokupheleleyo, zenziwe, kwaye zifakwe kwi-sintered ukuvelisa i-thermistor ene-coefficient yeqondo lokushisa elibi (NTC). ).

Inqanaba lophuhliso lwe-NTC thermistor: ukusuka ekufumaneni kwayo ngenkulungwane ye-19 ukuya ekuphuhlisweni kwayo kwinkulungwane yama-20, isalungiswa.

Ukuchaneka kwethemometha ye-thermistor inokufikelela kwi-0. 1℃, kwaye ixesha lokuva ubushushu linokuba ngaphantsi kwe-10s. Ayifanelekanga kuphela i-thermometer ye-granary, kodwa ingasetyenziselwa ukugcina ukutya, amayeza kunye nempilo, ukulima kwenzululwazi, ulwandle, inzulu, ukuphakama okuphezulu, ukulinganisa ubushushu be-glacier.

3.CTR thermistor

I-Critical Temperature Thermistor CTR (I-Critical Temperature Resistor) inesimo esibi sokuchasa ukuguquka, kwiqondo lokushisa elithile, ukuchasana kuncipha kakhulu ngokunyuka kweqondo lokushisa kwaye kunomlinganiselo omkhulu wokushisa ongalunganga. Izinto zokuqulunqa i-vanadium, i-barium, i-strontium, i-phosphorus kunye nezinye izinto zomzimba oxubeneyo, i-semiconductor ye-semi-glassy, ​​eyaziwa ngokuba yi-CTR ye-glass thermistor. I-CTR ingasetyenziswa njenge alarm yokulawula ubushushu kunye nezinye izicelo.

I-Thermistor inokusetyenziswa njengento yesekethe ye-elektroniki kwimbuyekezo yobushushu besekethe yesixhobo kunye nembuyekezo yobushushu besiphelo esibandayo se-thermocouple. Ulawulo lokuzuza ngokuzenzekelayo lunokuphunyezwa ngokusebenzisa i-self-heating character of NTC thermistor, kunye ne-amplitude stabilization circuit, isiphaluka sokulibaziseka kunye nokukhusela isiphaluka se-RC oscillator inokwakhiwa. I-PTC thermistor isetyenziswa ikakhulu kwizixhobo zombane zokukhusela ubushushu obugqithileyo, ukuhanjiswa konxibelelwano, ubushushu obungaguqukiyo, ulawulo lokuzuza ngokuzenzekelayo, ukuqala kwemoto, ukulibaziseka kwexesha, ukujizeka okuzenzekelayo kweTV, i-alam yomlilo kunye nembuyekezo yobushushu, njl.