Kodi thermostat ndi chiyani?
Olamulira kutentha ali ndi mayina osiyanasiyana, monga ma switch owongolera kutentha, zoteteza kutentha ndi zowongolera kutentha. Malinga ndi mfundo yogwirira ntchito, imatha kugawidwa m'magulu awiri: thermostat ya jump type, thermostat ya liquid type, thermostat ya pressure type ndi thermostat yamagetsi. Mu zida zamakono zowongolera mafakitale, thermostat ya digito ndiyo yomwe imagwiritsidwa ntchito kwambiri. Malinga ndi kapangidwe kake, chowongolera kutentha chimagawidwa m'magulu awiri: chowongolera kutentha chophatikizika ndi chowongolera kutentha chokhazikika.
Kodi ma thermometers ndi chiyani?
Thupi loyezera kutentha ndi gawo lomwe limasintha chizindikiro cha kutentha kukhala chizindikiro chamagetsi, ndipo nthawi zambiri limayikidwa mu gawo lozindikira la chinthu cholamulidwa kuti liziyang'anira kutentha kwake. Mu gawo la kayendetsedwe ka mafakitale, ma thermometer omwe amagwiritsidwa ntchito kwambiri ndi monga ma thermocouples, ma thermal resistors, ma thermistors ndi masensa osakhudzana. Pakati pawo, atatu oyamba ndi ma thermometer olumikizana.
1. Chipinda chopoperamo kutentha
Mfundo yoyezera kutentha kwa ma thermocouple imachokera pa Seebeck effect (thermoelectric effect). Pamene zitsulo ziwiri za zinthu zosiyanasiyana (nthawi zambiri ma conductor kapena ma semiconductor, monga platinum-rhodium, nickel-chromium-nickel-silicon ndi zinthu zina zolumikizidwa) zimapanga loop yotsekedwa ndikugwiritsa ntchito kutentha kosiyana kumapeto awiri olumikizirana, mphamvu ya electromotive imapangidwa pakati pa zitsulo ziwirizi. Loop yotereyi imatchedwa "thermocouple," pomwe zitsulo ziwirizi zimatchedwa "thermal electrode," ndipo mphamvu ya electromotive yomwe imachokera imatchedwa "thermoelectric motivation force." Ma Thermocouple amadziwika ndi kuchuluka kwawo kwakukulu kwa kutentha, kuyankha mwachangu kwa kutentha, komanso kukana kwamphamvu kwa kugwedezeka.
2. Kukana kutentha
Kukana kutentha ndi gawo lomwe limasintha chizindikiro cha kutentha kukhala chizindikiro chamagetsi, ndipo mfundo yake yogwirira ntchito imadalira makamaka mawonekedwe a kusintha kwa kukana kwachitsulo ndi kutentha. Makamaka, zotsutsana ndi kutentha zimagwiritsa ntchito mphamvu iyi yachitsulo poyesa kutentha.
Mu kayendetsedwe ka mafakitale, mitundu yodziwika bwino ya kukana kutentha ndi platinamu, mkuwa ndi nikeli. Pakati pawo, kukana kwa platinamu ndiko komwe kumadziwika kwambiri. Kukana kutentha kumakhala ndi mawonekedwe a kulumikizana bwino kwa kutentha, magwiridwe antchito okhazikika komanso kulondola kwambiri pa kutentha kwabwinobwino. Chifukwa chake, m'malo ogwiritsira ntchito kutentha koyenera, osagwedezeka komanso olondola kwambiri, kugwiritsa ntchito kukana kwa platinamu nthawi zambiri kumakhala koyenera.
3. Chotenthetsera
Thermistor ndi chinthu chomwe chimasintha chizindikiro cha kutentha kukhala chizindikiro chamagetsi, ndipo mfundo yake yogwirira ntchito imadalira kwambiri mawonekedwe a kukana kwa semiconductor kusintha ndi kutentha. Makamaka, ma thermistor amagwiritsa ntchito mphamvu iyi ya ma semiconductor poyesa kutentha. Poyerekeza ndi kukana kwa kutentha, kukana kwa thermistor kumasintha kwambiri ndi kusintha kwa kutentha, kotero mulingo wake woyezera kutentha ndi wochepa (-50~350℃).
Ma thermistors amagawidwa m'magulu a NTC thermistors ndi PTC thermistors. Ma thermistors a NTC ali ndi coefficient yotsika ya kutentha, ndipo mtengo wawo wokana umachepa pamene kutentha kukukwera. PTC thermistor ili ndi coefficient yotsika ya kutentha, ndipo mtengo wake wokana umawonjezeka ndi kutentha kukukwera. Chifukwa cha mawonekedwe ake apadera a kukana kutentha, thermistor ili ndi ntchito zambiri pozindikira kutentha, kulamulira kokha, zida zamagetsi ndi zina.
Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa zida zamagalimoto za MG&MAUXS zomwe zikulandiridwa kugula.
