Method for measuring air leakage rate of building atrium external window

The invention relates to the field of air conditioning, and particularly relates to a method for measuring the air leakage rate of a building atrium external window. The method comprises the steps of firstly determining the air leakage rate of the external window and the indoor and outdoor pressure difference based on test data of a small room, then measuring the indoor and outdoor pressure difference at each orientation of a building atrium, and finally acquiring the air leakage rate of the atrium external window based on the external window air leakage rate of the small room, the indoor and outer pressure difference and the indoor and outdoor pressure difference at each measuring point of the atrium. The method provided by the invention is high in measurement precision, influences imposed on the external window air leakage rate by the orientations and the height difference are sufficiently considered in the measuring process, and the measurement precision can be ensured. The measurement method provided by the invention is simple, and only some indoor and outdoor pressure difference measuring points of the external window are additionally arranged on the basis of a traditional measurement method. The method is wide in application range, limitations of the traditional method are overcome, and the modified measurement method can be widely applied to large-space buildings.