1. suav nrog cov yeeb nkab roj, cov yeeb nkab ua kua thiab rwb thaiv tsev.
2. Ze li ntawm 70% ntawm tag nrho cov txheej txheem ntawm VRF ceg khoom siv tau ua tiav.
3. Txhua Ceg Cov Khoom Siv yog degreased / deoiled, tsis muaj kev sib cuag nrog H2SO4, tsis muaj kev cuam tshuam loj heev rau ib puag ncig, thiab tsis muaj tshuaj lom rau cov yeeb nkab tooj liab.
4. Xaiv cov khoom siv ceg raws li cov lus qhia rau cov qauv tsim raws li lub peev xwm ntawm cov khoom siv hauv qab IDUs.
5. Txiav qhov tsis xav tau los ntawm cov cuab yeej tshwj xeeb (xws li cutters) raws li qhov tseeb cov yeeb nkab txoj kab uas hla.
6. Tag nrho cov txheej txheem brazing tsis siv neeg, ua cov khoom siv brazing tusyees faib, ua tiav kev nkag mus rau kev ua kom ntseeg tau tias txhua ceg khoom siv zoo.
7. Txhua qhov khoom siv ceg ntoo raug kuaj rau huab cua nruj los ntawm 5.0MPa siab, tawg siab siab tshaj 12.51MPa.
8. Ua tib zoo saib xyuas kev kho mob ntawm cov xwm txheej tshwj xeeb hauv qab no: A. Thaum qhov tseeb cov yeeb nkab txoj kab uas hla sib tw nrog U-shaped tee ntawm qhov kawg ntawm qhov tsis sib haum, braze cov yeeb nkab nrog U-shaped tee ncaj qha. B. Rau qhov kawg inlet, txiav nws ntawm lub hauv paus ntawm flared kawg nyob rau hauv raws li
