The fresh air transmission method adopts the displacement type instead of the internal circulation principle of the air-conditioning gas and the unhealthy practice of mixing old and new gas. The outdoor novel air is automatically sucked into the room through the negative pressure mode, and is installed in the bedroom, the living room or the living room window. When the fresh air inlet enters the room, it will automatically remove dust and filter. At the same time, the corresponding indoor pipeline is connected with the exhaust vents in several utility rooms, and the circulatory system will take away the indoor exhaust gas, and concentrate on the exhaust vents to "exhale", and the exhausted exhaust gas is no longer used for recycling. New and old styles with good circulation.
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