因此，可在不增加冰箱的总体尺寸以及不引起对于冷气的流入的阻力的情况下，增大涡轮风扇的叶片的高度。

Therefore, it is possible to increase the height of the blades of the turbo fan without increasing the total size of the refrigerator and causing resistance to the inflow of cool air.

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当风扇转速一定时，冷却系统阻力随车速的增大而增大，冷凝器阻力对车速变化比较敏感。

The drag of cooling system will become bigger with the increase of speed of fan when the speed of car is constant and the drag of radiator is sensitive to speed of fan.

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