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A diagram might be helpful.You're kind of stating that both occur: pull air in from the outside AND recirculate the interior air?? Modern window units do not pull air from the outside, except as noted that a few might have a lever to open up to outside air.
EDIT: o.k., maybe your wording is just a bit confusing. They use outside air on the condenser, but it is not "pulled in" to the inside room.
Does A Window Air Conditioner Pull Air From Outside? - HVAC BOSS
The first time you switch on that air conditioner in the summer, it really does seem like magic. Especially if you've had to go without it for any length ofhvac-boss.com
They typically have two fans run off a common shaft. The outdoor fan circulates air across the condenser. The indoor fan pulls air from the room across the cooling coil. Indoor and outdoor air never mix - the unit is sealed on the inside.