一、為什么干手器能自動開關

自(zi)(zi)動(dong)開(kai)關是指(zhi)人(ren)體(ti)紅外智(zhi)能感(gan)應(ying)(ying)開(kai)關，是一(yi)種當有人(ren)從(cong)紅外感(gan)應(ying)(ying)探(tan)測區域經過而(er)自(zi)(zi)動(dong)啟動(dong)的開(kai)關。那么干手器(qi)原(yuan)理是什么呢(ni)？干手器(qi)能自(zi)(zi)動(dong)開(kai)關是因為(wei)(wei)在(zai)干手器(qi)內部(bu)，安裝了(le)變容(rong)(rong)式(shi)自(zi)(zi)動(dong)感(gan)應(ying)(ying)電(dian)(dian)(dian)(dian)(dian)路，由它控制(zhi)著一(yi)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)橋(qiao)平衡電(dian)(dian)(dian)(dian)(dian)路。電(dian)(dian)(dian)(dian)(dian)橋(qiao)平衡電(dian)(dian)(dian)(dian)(dian)路由四部(bu)分(fen)組(zu)(zu)成，稱為(wei)(wei)四個(ge)(ge)橋(qiao)臂。變容(rong)(rong)式(shi)自(zi)(zi)動(dong)感(gan)應(ying)(ying)電(dian)(dian)(dian)(dian)(dian)路組(zu)(zu)成了(le)其中的一(yi)個(ge)(ge)橋(qiao)臂。它的感(gan)應(ying)(ying)部(bu)分(fen)，安裝在(zai)干手器(qi)的出風(feng)口(kou)處。當濕手在(zai)風(feng)口(kou)下出現時，因為(wei)(wei)人(ren)體(ti)是導體(ti)，也能形成電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)，于是，使感(gan)應(ying)(ying)部(bu)分(fen)的電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)量發生變化，立(li)即使電(dian)(dian)(dian)(dian)(dian)橋(qiao)電(dian)(dian)(dian)(dian)(dian)路中的四個(ge)(ge)橋(qiao)臂的量值，從(cong)平衡轉(zhuan)向不(bu)平衡。原(yuan)來在(zai)平衡狀態(tai)下，橋(qiao)臂中能互相抵消的電(dian)(dian)(dian)(dian)(dian)流(liu)，不(bu)再抵消，出現了(le)一(yi)股新的電(dian)(dian)(dian)(dian)(dian)流(liu)。它能使吸鐵(tie)繼電(dian)(dian)(dian)(dian)(dian)器(qi)動(dong)作，接通(tong)風(feng)扇(shan)和電(dian)(dian)(dian)(dian)(dian)熱(re)器(qi)上(shang)的電(dian)(dian)(dian)(dian)(dian)源，就(jiu)會(hui)有風(feng)吹出來。

二、干手器安裝高度

干手(shou)器的安(an)裝(zhuang)高度一(yi)般(ban)是在(zai)1.2m左右，離洗手(shou)臺30-40cm遠。如果安(an)裝(zhuang)在(zai)家中就要考(kao)慮使用人群，一(yi)般(ban)家用型的掛式感受求可以根據家人的平(ping)均身高來安(an)裝(zhuang)，如果有(you)小孩可以選擇安(an)裝(zhuang)落地式向(xiang)上的干手(shou)器。

三、干手器有輻射嗎

一般通電的東西(xi)都會有(you)電離輻(fu)射(she)的，只(zhi)是輻(fu)射(she)大小(xiao)的問題，干手器也是有(you)輻(fu)射(she)的，不過不用擔心，畢竟它的體量并不大，并且(qie)你(ni)只(zhi)是使用不到半分鐘(zhong)，基本不會被輻(fu)射(she)所影響。

四、如何挑選干手器

挑選干手器主要根據自己的需要和環境等情況來決定是選以風為主熱量為輔的風量型的干手器，還是以熱量為主的熱風型干手器。此外，還需要考慮到干手器的外殼材質、重量、顏色、啟動原理、安裝方式、工作噪音、運行功率、干手時風溫等參數。購買的干手器品牌要有(you)質量保障，以(yi)用(yong)起來舒適為(wei)宜。