REVIEW: It is important to isolate the air conditioner air flow. Air conditioners work by producing heat as part of the "cooling" process. Hot air is pushed out of one side and cool air from the other. Keep the hot part out of your area as much as possible. Often, the hot air tubes become radiant heaters, themselves. Keep them as short as possible and insulate them if possible.
The doors into the room appear to be close together. If the doors open into a hallway or into a common room, that area will become a larger room to cool, in effect.
If the adjacent room is cooler than yours, the fan alone in the doorway will equalize the temperature by recirculating and mixing the air with both doors open. If not close the door to reduce the load on your air conditioner.
The Fan: Once you have isolated yourself in your environment, position the fan to create optimal air circulation within the room by having all the air moving in the same direction. Try putting it against the centre of a wall so that air is pushed around the room in as smooth a circular pattern as possible.