洗衣機，無論是在斷電還是通電狀態下，只要打開連接進水的水龍頭就進水，其他功能正常 據此判斷為進水閥故障，拆機取出進水閥，測線圈阻值為5KΩ，正常。打開閥(fa)(fa)體，閥(fa)(fa)內(nei)黑色污垢很(hen)多，用(yong)(yong)水(shui)清洗(xi)后檢查橡膠墊(dian)無任(ren)何破損(sun)，但膠墊(dian)上兩(liang)通(tong)(tong)氣(qi)(qi)孔(kong)均被(bei)污垢堵(du)塞(sai)，用(yong)(yong)針疏(shu)通(tong)(tong)后再次清洗(xi)組裝后試機(ji)工作正常。 進(jin)(jin)水(shui)閥(fa)(fa)的橡膠墊(dian)為關鍵部件，該墊(dian)工作于兩(liang)種狀(zhuang)態，一是連通(tong)(tong)進(jin)(jin)水(shui)槽和出(chu)水(shui)孔(kong)使洗(xi)衣(yi)機(ji)進(jin)(jin)水(shui)，另(ling)外是堵(du)塞(sai)出(chu)水(shui)孔(kong)使進(jin)(jin)水(shui)槽和出(chu)水(shui)孔(kong)不連通(tong)(tong)，進(jin)(jin)水(shui)閥(fa)(fa)斷水(shui)，當(dang)進(jin)(jin)水(shui)閥(fa)(fa)線圈失電時(shi)，鐵心在彈簧(huang)作用(yong)(yong)力下堵(du)住通(tong)(tong)氣(qi)(qi)孔(kong)1，進水槽中水壓(ya)由通氣(qi)孔2傳遞到(dao)空(kong)腔(qiang)側(ce)，二(er)者(zhe)壓(ya)力(li)相(xiang)等，但橡(xiang)膠(jiao)(jiao)墊(dian)還受彈(dan)簧(huang)鐵心(xin)壓(ya)力(li)，所以(yi)橡(xiang)膠(jiao)(jiao)墊(dian)封堵(du)住(zhu)出(chu)水(shui)(shui)孔(kong)(kong)(kong)，進(jin)水(shui)(shui)閥出(chu)水(shui)(shui)孔(kong)(kong)(kong)無水(shui)(shui)，當線圈得電使鐵心(xin)克(ke)服彈(dan)簧(huang)壓(ya)力(li)向(xiang)(xiang)上(shang)運動時(shi)，空(kong)腔(qiang)與出(chu)水(shui)(shui)孔(kong)(kong)(kong)相(xiang)通，壓(ya)力(li)變(bian)小，進(jin)水(shui)(shui)槽(cao)水(shui)(shui)壓(ya)大(da)于空(kong)腔(qiang)側(ce)壓(ya)力(li)，使橡(xiang)膠(jiao)(jiao)墊(dian)向(xiang)(xiang)空(kong)腔(qiang)側(ce)凸出(chu)，進(jin)水(shui)(shui)槽(cao)與出(chu)水(shui)(shui)孔(kong)(kong)(kong)連通進(jin)水(shui)(shui)。 該機(ji)進(jin)水(shui)(shui)閥中兩通氣孔(kong)(kong)(kong)均堵(du)塞，進(jin)不槽(cao)側(ce)水(shui)(shui)壓(ya)遠(yuan)大(da)于空(kong)腔(qiang)側(ce)壓(ya)力(li)和彈(dan)簧(huang)向(xiang)(xiang)空(kong)腔(qiang)對膠(jiao)(jiao)墊(dian)的(de)壓(ya)力(li)，所以(yi)總使橡(xiang)膠(jiao)(jiao)墊(dian)向(xiang)(xiang)空(kong)腔(qiang)側(ce)凸出(chu)，使進(jin)水(shui)(shui)槽(cao)和出(chu)水(shui)(shui)孔(kong)(kong)(kong)一直(zhi)連通而失控。