The invention relates to a
fresh air variable air rate energy saving method and device based on absolute
humidity control. The
fresh air variable air rate energy saving method is characterized in that the
fresh air variable air rate energy saving device based on the absolute
humidity control is arranged at the
tail end of the fresh air
system of an
air conditioning system, the opening degree of a valve is automatically controlled through the fresh air variable air rate energy saving device according to the change of indoor
humidity, and the fact that the volume of fresh air supplied indoors meets indoor actual dynamic needs is guaranteed; the
air volume is automatically adjusted according to the change of the
moisture content, namely, the absolute humidity of a room, air output by a fresh air handling unit is dry air of a fixed state, and the
relative humidity value of the room is guaranteed; the
coupling relationship of
relative humidity and dry-
bulb temperature is relieved. The absolute humidity, an indoor environment parameter, is controlled, the indoor
relative humidity can be precisely controlled, the
coupling relationship of the relative humidity and the dry-
bulb temperature is relieved well, the
moisture condensation risk of a cold emission plate is avoided, meanwhile, control is stable and reliable, and the fresh air variable air rate energy saving method and device have good comfort and the good energy saving effect.