Izinguquko Eziyinhloko Zezinhlelo Zokupholisa Uma Zishintsha i-R12 nge-R134a

Izimpawu ze-thermodynamic ze-R134a zifana nezika-R12, kodwa izimpawu zazo zomzimba zihluke. Ngakho-ke, izilungiselelo ezifanele kumasistimu okuphola zidingeka uma kusetshenziswa i-R134a njengokufaka esikhundleni se-R12. Ngokwehluka kwezimpawu zomzimba, i-R134a ayihlangani ne-mineral oil, kanti i-R12 inobudlelwano obuhle nayo. Lokhu kusho ukuthi i-mineral oil ohlelweni lokuqala kumele ifakwe i-polyol ester (POE) oil noma i-polyalkylene glycol (PAG) oil ehambisana ne-R134a. Ukwehluleka ukwenza lokhu kuzovimbela i-lubricating oil ekuphakeleni ne-refrigerant, okuholela ekunganeliseki kokunisela kwe-compressor, okukhona kuholela ekugugumeni kwe-compressor nasekushiseni. Okwesibili, ingcindezi ye-saturated vapor ye-R134a ihluke kuleyo ye-R12, futhi ukuhambisana kwayo nezikhwama zohlelo kuyahluka. Izikhwama ze-nitrile rubber ezivame ukusetshenziswa kumasistimu e-R12 zizokhula futhi zife uma zixhumana ne-R134a. Ngakho-ke, izikhwama kumele zishintshwe ngezokwenziwa ze-hydrogenated nitrile butadiene rubber (HNBR) noma i-fluororubber. Ngasikhathi sinye, imigudu eshiywe isikhathi eside nezivalo kufanele zihlolwe futhi zishintshwe ukuze kugwenywe uku leaking kwe-refrigerant okubangelwa ukungafaneleki kokuvikela. Ngaphezu kwalokho, ukusebenza kokudluliswa kokushisa nezici zokuhamba kwe-R134a kancane kuhluke kwe-R12. Ukuze kuqinisekiswe ukusebenza kahle kokuphola, kubalulekile ukufaka ifilitha ye-drier ye-system ngehlobo le-XH-7 noma le-XH-9 molecular sieve drier filter efanelekile ku-R134a, ukuze kuvinjelwe ukuvimbela kweqhwa okubangelwa umswakama ohlelweni. Ngasikhathi sinye, izinga lokuvula le-valve yokwandisa noma usayizi we-throttle orifice ungashintshwa ngokuya ngezimo zangempela ukuze kuthuthukiswe ukulawulwa kokuhamba kwe-refrigerant. Ekugcineni, ngemva kokuphothula ukushintshwa kwezingxenye nokuhlanza imigudu, uhlelo kumele lukhishwe ukuze kuqinisekiswe ukuthi awekho umoya noma umswakama osalayo ngaphakathi. Bese, gcwalisa uhlelo nge-refrigerant efanelekile ku-R134a, uqhubeke ngokulandela inani lokugcwalisa elichazwe encwadini yemishini ukuze ugweme ukugcwaliswa okunganele noma okweqile okungathinta ukusebenza kahle kokuphola.