The air cooler sends filtered cold air to the room. The indoor air density is increased, forcing the window to form a positive pressure zone, and the indoor sultry air is driven out of the room due to the increasing air pressure. In the actual application of industrial plants, the chillers are installed centrally on one side of the plant, and are exported to the other side of the plant. The air is convectively blown from the outlet to the outlet of the chiller. During this process, the doors and windows near the chiller remain closed, forcing air to be compensated into the workshop by the door and window on the side of the inlet. The air is lined up in an orderly manner, flowing into the workshop from the air inlet, flowing through the workshop, and discharging the workshop under the pressure of the large air volume of the air cooler. The ventilation is thorough and efficient, and the ventilation rate can be as high as 99%. Through specific engineering design, designing ventilation speed and wind speed according to needs, any high heat, harmful gas and dust smoke can be quickly discharged into the workshop, and any problem of poor ventilation can be completely solved at one time. Ventilation is achieved within seconds of turning on the chiller.