流言:从工作原理、工作时间和工作效果上来看,空调的除湿模式相对于制冷模式更省电,大家要想省电,建议开空调时就用除湿模式。真相:除湿、制冷两种模式都可以制冷,但哪种模式更省电需要根据室内外空气的温度和湿度等情况来具体分析。除湿的原理是把温度降到空气中的水蒸气可以冷凝的程度,水蒸气凝结成的冷凝水会经过空调管道通过室外机排出去。随着水汽不断凝结成冷凝水排出室外,房间内的湿度也会随之下降。在没有水汽增加的情况下,即便关了空调,房间的湿度也可以维持一段时间。制冷关闭后,室温往往会逐渐上升。因为,热量会像水的流动一样,从热量高的地方向热量低的地方传递,所以空调关闭后,如果室外温度高于室内,热量则会通过门窗、墙壁等传递进来,室温便会逐渐上升,直到热量平衡。一般来说,当气温在20℃~30℃,空气的湿度很高时,除湿模式比制冷模式省电;当气温大于30℃时,除湿和制冷模式的用电量差不多,但是除湿模式降温效果比不上制冷模式。除湿的主要目的是降低湿度,尽快改善闷热的环境,适合沿海等地区梅雨天或者回南天等;制冷主要是降温,也有一些除湿效果,但是是副效应。
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