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断桥铝窗资讯

冬季切忌为门窗玻璃罩上塑料薄膜,小心病从“罩”出

到了寒冷的冬季,好多家庭都为了保暖起见都喜欢在门窗玻璃上罩一层塑料薄膜,用以防止窗子漏风提高室内温度。这样做虽然能起到一些防风保暖作用,但也有它不利的一面,这就是加罩一层塑料布会严重影响室内的日照。

冬季切忌为门窗玻璃罩上塑料薄膜,小心病从“罩”出

日照,指的是太阳光透过门窗进入室内的直射日光。日照与人的健康关系极为密切,特别是在冬季,人们大部分时间是在室内度过的,日光直射的机会比较少,这就要求冬季室内要有良好的日照和足够的日照时间。阳光直射到室内后,通过人的视觉和皮肤可产生温热感和光电效应,从而能提高人的免疫能力,促进新陈代谢,加强人体各个系统的功能。对儿童来说足够的日照还有利于生长发育和具有搞佝偻病的作用。阳光中的紫外线可以杀死室内细菌,良好的日照能有效的减少室内致病菌的密度,降低冬春季传染病发病机会。据测定,京津地区日光透过玻璃直射入室内,两小时可心杀灭室内50%的链球菌,三小时可杀灭70%左右。说明日照时间越长,室内致病菌被杀死的就越多,人的患病机会也就随之减少。
   
阳光射在玻璃上,并非所有紫外线都能进入室内,其中约有60-70会被玻璃吸收或者反射掉。如果玻璃不洁,透明度差,进入室内的紫外线就会更少了。我国东北高寒地区,为了提高室内温度,许多人采用双层玻璃,据有关部门测定,双层玻璃的日照效果远不如单层下班,紫外线被吸收和折射掉的就会更多。据哈尔滨地区实验资料证实,把装有葡萄球菌的器皿放在单层玻璃的房间里,在冬季中午直射光线下三小时即可杀死被试细菌的90%,而置于双层玻璃的房间内,则要五个小时才能达到同样的效果,塑料薄膜的透明度和光洁度远远不如玻璃,在门窗上加罩一层薄膜,无疑会使日照受到严重影响,所以,冬季取暖不仅不应在门窗上罩上别的东西,而且应经常擦玻璃,让更多紫外线、红外线进入室内为人们的健康服务。

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