Abstract

This study reported computational fluid dynamics analysis on the behavior of R290 when it leaked into the room from a split household air conditioner. A leak experiment from a wall-mounted indoor unit was conducted to verify the validity of the analytical model and calculation method. The research aims to evaluate the necessity of operating the indoor unit fan when the refrigerant leaks to ensure safety when the refrigerant leaks from the air conditioner indoor unit. Blowing air diagonally downward from a wall-mounted indoor unit effectively facilitated refrigerant diffusion. Blowing air upward at 45 degrees from a floor-standing indoor unit was effective. Regarding the effect of the room area on the fan wind speed, it was essential to blow out the fan airflow in a direction that facilitates the formation of indoor circulating flow.