Following passing in the expansion valve, the liquid refrigerant enters the evaporator. Because the refrigerant enters the evaporator, it absorbs the warmth of your indoor air and cools the indoor air. As the liquid refrigerant extracts heat with the indoor air, it evaporates and again converts into vapor refrigerant https://controltechme.com/hvac-companies-in-uae-dubai-ahu-fahu-chiller/