每到炎热的夏季,各种各样能降温解暑的电器就格外受人们的青睐,电风扇就是其中的一种。一次,我跟父亲去亲戚家吃饭,那时天气酷热,可我坐的那个位置电风扇偏偏吹不到,热得我汗流浃背。回家后,我思考了很久。电风扇因便宜、安装方便、吹风自然等优点,深受人们的喜爱,但它也有一些弊端:1.摆头角度小,一般只有90°左右,因此受风面积小,受益人少,对于人多面积大的地方来说不是很能适应需求;2.等待时3. Every hot summer, all kinds of appliances that can cool the summer heat are particularly popular, fans are one of them. Once, my father and I went to relatives to eat, when the weather was hot, but I sit in the position where the fan could not blow, hot I sweat. After going home, I thought for a long time. Fans because of cheap, easy installation, natural hair, etc., by the people’s favorite, but it also has some drawbacks: 1 swing angle is small, usually only about 90 °, so the wind area is small, beneficiaries less, for people Area is not very large enough to adapt to demand; 2. Waiting time 3.