Tub yees R404a yog cov tub yees sib xyaw, uas yog li ntawm 44% R125, 4% R134A, thiab 52% R143A. Ob lub tub yees txias tsis tuaj yeem sib xyaw. R22 yog thawj tub yees, thiab R404a yog cov tub ntxhais sib xyaw theem nrab tub yees, azeotropic thiab tsis-azeotropic, qhov kub taw tes siab yog txawv. ODP ntawm tub yees yog 0, thiab GWP yog 4540.
Qhov paug tawm ntawm R404A tub yees yog li ntawm 1.2 npaug ntawm R22, thiab cov dej ntws tawm ntau yog li 1.5 npaug ntawm R22. Cov pa tso tawm kom tsawg thiab cov kuj nce ntxiv. Feem ntau hais lus, lub peev xwm hloov tshav kub ntawm cov kwj dej yog nce ntxiv 20% rau 30% dua R22.
R404A yog dej tsis-azeotropic sib xyaw ua haujlwm kua. Kev sib xyaw ua ke ntawm cov khoom siv uas tsis yog-azeotropic hloov pauv nrog kev ntsuas kub thiab siab. Qhov no coj qee yam nyuaj rau kev tsim, kev debugging thiab kev kho lub tub yees, thiab tseem muaj qhov cuam tshuam rau lub tshav kub hloov ua tiav ntawm lub system. Tshwj xeeb tshaj yog thaum cov roj tso tawm, qhov system tub yees tau pom zoo kom ua tiav thiab hloov chaw, thiaj li ua kom muaj qhov sib npaug ntawm txhua qhov sib xyaw ua kom tiav thiab ua tiav cov qauv tsim lub tub yees.
