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空气阻力的确定与风机的正确选择是冻结装置设计能否成功的关键。通过论述空气阻力的确定过程，指出了计算空气阻力必须包含的内容及在设计冻结装置时应采取的措施和注意事项；并强调，在选择冻结装置冷却设备时必须对蒸发器和风机分别进行选择，才能确保所要求的设计参数。
Determination of air resistance and fan the right choice is the key to the success of the design of the device. By discussing the process of determining the air resistance, it is pointed out that the calculation of the air resistance must include the contents and the measures and precautions to be taken in the design of the freezing device. It is also emphasized that the evaporator and the fan must be selected respectively when selecting the cooling device for the freezing device , To ensure that the required design parameters.