Air conditioner box capable of resetting constant fresh air volume

The utility model relates to an air conditioner box capable of resetting a constant fresh air volume in the field of air conditioner ventilation. The technical scheme is that the air conditioner box is formed by sequentially connecting a fresh air returning section, a coarse-medium effect filtering section, a cold-heat exchange coil pipe section, a humidifying section and an air feeding section; a fresh air pipe and an air returning pipe are positioned at the fresh air returning section; a fresh air dual-position electric air valve is arranged on the fresh air pipe; an air returning electric adjusting air valve is positioned on the air returning pipe. An actuator is positioned on the air returning electric adjusting air valve; a negative pressure measuring pipe is arranged at a stable pressure position in the fresh air returning section; a zero pressure measuring pipe is arranged at an outdoor stable pressure position; the negative pressure measuring pipe and the zero pressure measuring pipe are connected ont