An air conditioner is provided that includes an outer circulation unit. The outer circulation unit includes an outer circulation housing, an outer circulation inlet, an outer circulation outlet, and a condenser. The outer circulation inlet is formed on the outer circulation housing. The outer circulation outlet is formed on the outer circulation housing. An outer circulation flow enters the outer circulation unit via the outer circulation inlet, passes through the condenser to remove heat from the condenser, and leaves the outer circulation unit via the outer circulation outlet, wherein the height of the outer circulation inlet is higher than the height of the outer circulation outlet in a vertical direction.