All-in-one ecological fresh air machine

The invention discloses an all-in-one ecological fresh air machine which comprises an external housing and internal fresh air handling unit, wherein the external housing is used for protecting internal air handling components and serves as a hoisting and bearing structure; the internal fresh air handling unit comprises a filter, fans, a total heat exchanger, a surface air cooler, a humidifier, an activated carbon adsorption module, a photo-energy particle sterilizer, an electric heater and related valves. The all-in-one ecological fresh air machine can be used for integrated processing of a small-scale fresh air system to achieve the purpose of integrating the functions of reaching PM2.5 fresh air filtering quality, sterilization, odor removing, heating, cooling, humidifying and dehumidifying, so that repeated investment of equipment is avoided, and ceiling space is saved; moreover, in transitional seasons, fresh air can be prevented from passing the total heat exchanger, the surface air cooler and the like b