Fresh air module and wall-mounted air conditioner indoor unit with same

The utility model provides a fresh air module and a wall-mounted air conditioner indoor unit with the fresh air module. The fresh air module comprises a shell, at least one fan and at least one air door. The shell is provided with a first ventilation opening, a second ventilation opening and a third ventilation opening. The at least one fan is arranged in the shell and used for promoting air in the shell to flow. At least one air door is arranged to be capable of achieving conduction of any two of the first ventilation opening, the second ventilation opening and the third ventilation opening and blocking of the remaining ventilation opening. Wherein the first ventilation opening is communicated with the outdoor environment, and the second ventilation opening and the third ventilation opening are communicated with the indoor environment. Under the condition that only one fresh air pipe is arranged, outdoor air is introduced into a room, indoor air is exhausted out of the room, or the air circulates in the room