車(chē)放在室外,如果傍晚用車(chē)了,那么停一晚上第二天玻璃上就會(huì)結(jié)霜。結(jié)霜的厚度與氣溫和空氣濕度有關(guān),氣溫越低空氣濕度越大,結(jié)霜越厚。一旦結(jié)霜了,必須要清理干凈之后才能開(kāi)車(chē),否則視線受到霜的阻擋,前方是一點(diǎn)都看不清的。那么它為什么會(huì)結(jié)霜?為什么有的車(chē)就不結(jié)?結(jié)霜了之后如何清理最有效。
先來(lái)說(shuō)一下為什么會(huì)結(jié)霜?溫差是造成結(jié)霜的主要原因,傍晚開(kāi)過(guò)車(chē)之后,車(chē)內(nèi)氣溫高,擋風(fēng)玻璃的溫度高,然后會(huì)慢慢散熱輻射冷卻,自身溫度降低,周?chē)諝鉁囟壬撸魵庥龅降蜏匚矬w就會(huì)在表面形成霜。沒(méi)有開(kāi)過(guò)的車(chē)結(jié)霜比較少,或者不結(jié)霜,就是因?yàn)闆](méi)有玻璃散熱冷卻的緣故,沒(méi)有溫差就不會(huì)結(jié)霜。但有的時(shí)候車(chē)雖然沒(méi)有開(kāi)也會(huì)結(jié)霜,這是因?yàn)橥砩蠚鉁氐停?chē)的溫度慢慢降低,當(dāng)清晨隨著氣溫逐漸升高,車(chē)的密封性好,車(chē)內(nèi)溫度升高的慢,就會(huì)出現(xiàn)車(chē)內(nèi)溫度低于周?chē)h(huán)境溫度,玻璃的溫度也低于環(huán)境溫度,水蒸氣遇到冷的玻璃就會(huì)在其表面形成霜。有的時(shí)候早上進(jìn)入車(chē)內(nèi),會(huì)感覺(jué)車(chē)內(nèi)比車(chē)外還冷,就是這個(gè)道理。因此有人說(shuō)停車(chē)后打開(kāi)車(chē)門(mén)散散熱就不會(huì)結(jié)霜了,這是不正確的,只要環(huán)境夠潮濕,外界氣溫變化快,天氣晴朗無(wú)風(fēng),照樣會(huì)結(jié)霜,只不過(guò)結(jié)霜是會(huì)變輕微一點(diǎn)的。
結(jié)霜了有三種方法可以去除,第一種是用玻璃水噴一下,稍等片刻霜就會(huì)松動(dòng)融化,用硬紙板卡片之類的物品很容易就能去除了。操作方法是首先把雨刮片豎起來(lái),然后噴玻璃水,這樣雨刮片就不會(huì)在玻璃上來(lái)回刷了,能保護(hù)雨刮片受損,玻璃水照樣可以噴在玻璃上,這是最快最有效的方法。這個(gè)方法要首先保證玻璃水是防凍的,玻璃水也被凍住是無(wú)法用這個(gè)方法的。噴玻璃水不方便的話也可以購(gòu)買(mǎi)除冰劑,噴在玻璃上也能很快把冰融化。
第二種方法是用暖風(fēng)吹,把車(chē)打著火熱車(chē),只要水溫升高,能夠吹出熱風(fēng)了,風(fēng)向調(diào)至吹玻璃,除霜也是很快的。吹一會(huì)兒就會(huì)融化,用雨刷刷一下就干凈了,比較省力。但等待水溫升高的過(guò)程是比較慢的,至少要5分鐘以上,東北地區(qū)要更久,因此適合不趕時(shí)間的情況下使用。
第三種方法是直接用雪鏟、硬卡片等一點(diǎn)一點(diǎn)鏟除,因?yàn)榻Y(jié)的霜不是太硬,因此也用不了太久就會(huì)鏟完。缺點(diǎn)是比較費(fèi)力,并且鏟的不會(huì)太干凈,只靠鏟視線還是會(huì)受影響,鏟完后還是要用雨刷刷一下才會(huì)干凈。
每天都結(jié)霜的話比較麻煩,于是有人想出了不讓車(chē)輛結(jié)霜的好辦法,用大毛巾把玻璃覆蓋,或者用車(chē)衣把車(chē)輛蓋起來(lái)。這樣就會(huì)隔絕空氣中的水蒸氣,水蒸氣不與玻璃接觸,自然也就不會(huì)結(jié)霜了。方法是有效的,就是有點(diǎn)麻煩,可以一試。
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