1. Raws li cov evaporation kub ts ntawm refrigerants nyob rau hauv tus qauv atmospheric siab (100kPa) tej yam kev mob, lawv muaj peev xwm muab faib ua: high-temperature refrigerants, medium-temperature refrigerants, thiab low-temperature refrigerants.
1) Cov tub yees txias txias, xws li R113, R114, thiab R21, feem ntau siv hauv cov tshuab cua txias ntawm cov tub yees centrifugal.
2) Cov tub yees txias nruab nrab, xws liR22, R717, R142, thiab R502, feem ntau yog siv nyob rau hauv ib qho yooj yim-theem compression thiab ob-theem compression piston tub yees compressors.
3) Cov tub yees kub kub, xws li R503, alkanes, thiab olefins, feem ntau yog siv nyob rau hauv qhov kub-kub theem ntawm cascade tub yees.
2. Raws li kev sib txawv ntawm cov tshuaj sib txawv, cov tub yees tuaj yeem muab faib ua pawg hauv qab no: cov khoom tsis muaj tshuaj lom neeg, halides ntawm saturated hydrocarbons, hydrocarbons, azeotropic refrigerants, thiab non-azeotropic refrigerants.
1) Inorganic compounds
2) Halides ntawm saturated hydrocarbons (xws li chlorine-muaj cov tshuaj xws li perchlorofluorocarbons thiab hydrochlorofluorocarbons)
3) Hydrocarbons
4) Azeotropic tub yees
5) Tsis yog-azeotropic refrigerant
Cov tub yees uas tsis yog azeotropic qhia tias thawj tus lej tom qab R yog 4, thiab ob tus lej tom qab raug suav nrog hauv qhov kev txiav txim ntawm kev tshawb pom, xws li R400, R401, R407A, R407B, R407C, thiab lwm yam. Cov tub yees sib xyaw muaj cov khoom sib xws tab sis sib txawv. , thiab txawv los ntawm cov lej ua raws li cov tsiaj ntawv.
Tswv yim:Txhawm rau paub qhov txawv ntawm qhov kev puas tsuaj ntawm cov tub yees rau cov txheej txheem ozone, R feem ntau hloov los ntawm CFC, HCFC, HFC, thiab HC feem.
CFC- perchlorofluorocarbon, muaj chlorine, fluorine thiab tsis muaj hydrogen. Nws muaj kev puas tsuaj rau txheej ozone. Peb lub teb chaws tau txwv tag nrho cov khoom tsim thiab siv tshwj tsis yog rau lub hom phiaj tshwj xeeb.
HCFC- Hydrochlorofluorocarbon, muaj cov tshuaj chlorine, fluorine thiab hydrogen, muaj kev puas tsuaj rau txheej ozone. Raws li kev hloov pauv rau CFC, nws tab tom raug txiav tawm ntawm qhov nrawm nrawm.
HFC- hydrofluorocarbon, tsis muaj cov tshuaj chlorine lossis fluorine, tsis muaj kev puas tsuaj rau txheej txheej ozone, tab sis muaj peev xwm ua rau lub tsev cog khoom siab. Raws li Kigali Kev Hloov Kho rau Montreal Protocol, cov txheej txheem tshem tawm yog pib.(Cov HFC cov tub yees muaj xws li:R134a tub yees gas, R410a tub yees gas, R404a refrigerant gas, thiab lwm yam)
HC- hydrocarbon, tsis muaj cov tshuaj chlorine lossis fluorine, tsis muaj kev puas tsuaj rau txheej txheej ozone, thiab muaj peev xwm ua rau lub tsev cog khoom tsawg.
