Is the refrigerant changed once a year? Turn off the common misunderstanding of air conditioning

Do you think that air-conditioning refrigerant needs to be changed once a year? Do you think that the air conditioner in your home does not open for a long time? Do you still think that even if you turn on the air conditioner indoor air for a long time, you don't need to replace it? In fact, these are all wrong practical concepts, and these misunderstandings often make us make wrong judgments. Nowadays