Fresh air system in addition to formaldehyde can be used in? Brief introduction of fresh air system. The principle of fresh air system is that in a closed room, fresh air is sent into the room by special equipment on one side and then discharged out of the room by special equipment on the other side, and a "fresh air flow field" will be formed indoors, thus meeting the needs of fresh air ventilation in the room. The implementation scheme is as follows: the centrifugal fan is driven by a high-pressure head and a high-speed DC brushless motor with large flow and low power, and blows air into the room from one side through mechanical force, and the other side forcibly forms a fresh air flow field in the system through a specially designed fresh air exhaust fan. At the same time of air supply, the air entering the room is filtered, disinfected, sterilized, oxygenated and preheated (in winter). When the exhaust air passes through the main engine, it exchanges heat with the fresh air, and most of the recovered energy is sent back indoors through the fresh air. Make use of the scheme of forming clean space on a large scale to ensure that the air entering the room is clean. In this way, indoor air can purify the environment. Fresh air system in addition to formaldehyde can be used in? The fresh air system can remove formaldehyde. The implementation scheme is that the centrifugal fan is driven by a high-pressure head, and the DC high-speed brushless motor with large flow and low power is used. Air is blown into the room from one side by mechanical force, and the fresh air flow field is forced to form in the system by a specially designed fresh air exhaust fan on the other side. At the same time of air supply, the air entering the room is filtered, disinfected, sterilized, oxygenated and preheated (in winter). When the exhaust air passes through the main engine, it exchanges heat with the fresh air, and most of the recovered energy is sent back indoors through the fresh air. The scheme of forming a clean space in a large scale ensures that the air entering the room is clean, so as to achieve the purpose of purifying the environment by indoor air.