Abstract: From the analysis of the principle of the heat exchange capacity of the outdoor unit of the air conditioner, the outdoor side air volume, and the calculation method of the heat exchange of the condenser, by optimizing the design of the external size of the outdoor unit, the key parameters of the fan and the heat exchanger, the height of the outdoor unit is reduced, and the width and thickness are increased. Reduce the height of the heat exchanger, increase the number of rows, and optimized and upgraded the dual-fan outdoor unit to a single-fan type. The experimental method compares the two outdoor units in terms of air volume, wind field, noise, performance of the whole machine, material cost per unit, and packing volume: it is concluded that the air volume, noise, and performance of the two outdoor units are the same, and the wind field of the single-fan outdoor unit is more uniform, the material cost of a single unit is reduced by 260 yuan, and packing quantity is increased by 20%.

Key words: Double-fan, Single-fan, Air volume, Wind field, Noise, Machine performance, Material cost, Packing quantity