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一、前言自1973年第一次石油危机以来,能源费用急剧上涨,促使制冷、采暖领域的节能技术得到了迅速发展,在此期间,也开发出了各种节能的除霜方法。如果将通常的空气冷却到饱和空气温度以下,空气中水分就会析出,即除湿。以0℃为界,0℃以上,以水的形态除湿;0℃以下,以霜的形态除湿。在0℃以上情况下,以水滴形态除湿,不会降低冷却性能。但是在0℃以下形成霜时,则一方面使冷却管间隙阻塞,另一方面形成热阻,冷却器(冷风机)传热性能下降。因此,为使传热性能不下降,
I. Introduction Since the first oil crisis in 1973, the sharp rise in energy costs has prompted the rapid development of energy-saving technologies in the field of refrigeration and heating. During this period, various energy-saving defrosting methods have also been developed. If the usual air is cooled to below the saturated air temperature, moisture in the air will precipitate, that is, dehumidification. To 0 ℃ for the community, 0 ℃ above, the form of water dehumidification; 0 ℃ below, dehumidification in the form of frost. In the case of more than 0 ℃, dehumidification in the form of water droplets, will not reduce the cooling performance. However, when the frost is formed below 0 ° C, the cooling tube gap is clogged on the one hand and the thermal resistance is formed on the other hand and the heat transfer performance of the cooler (air cooler) is reduced. Therefore, in order not to reduce the heat transfer performance,