我公司代理銷售:丹佛斯、艾默生全線熱力膨脹閥產品
熱力膨脹(zhang)閥(fa)安裝在蒸發(fa)器(qi)入口,常稱為(wei)膨脹(zhang)閥(fa),主要作用(yong)有(you)兩個:
1. 節(jie)流(liu)作用(yong):低(di)(di)溫(wen)高壓(ya)的液(ye)態制(zhi)(zhi)冷(leng)劑(ji)經過膨脹閥(fa)的節(jie)流(liu)孔節(jie)流(liu)后(hou),成(cheng)為低(di)(di)溫(wen)低(di)(di)壓(ya)的霧狀的液(ye)壓(ya)制(zhi)(zhi)冷(leng)劑(ji),為制(zhi)(zhi)冷(leng)劑(ji)的蒸發創(chuang)造(zao)條件;
2. 控(kong)制(zhi)制(zhi)冷(leng)劑的流量(liang):進入蒸發器(qi)的液(ye)態(tai)制(zhi)冷(leng)劑,經(jing)過(guo)蒸發器(qi)后,制(zhi)冷(leng)劑由(you)液(ye)態(tai)蒸發為氣態(tai),吸收(shou)熱量(liang),降低(di)車內的溫度。膨脹閥(fa)控(kong)制(zhi)制(zhi)冷(leng)劑的流量(liang),保證蒸發器(qi)的出(chu)口(kou)完(wan)全為氣態(tai)制(zhi)冷(leng)劑,若流量(liang)過(guo)大,出(chu)口(kou)含(han)有(you)液(ye)態(tai)制(zhi)冷(leng)劑,可能(neng)進入壓縮機產生液(ye)擊;若制(zhi)冷(leng)劑流量(liang)過(guo)小,提前蒸發完(wan)畢,造(zao)成制(zhi)冷(leng)不足;
3.熱力膨脹閥分(fen)為外(wai)平衡(heng)和內(nei)平衡(heng)兩種,在(zai)小型制冷系統(tong)中適合內(nei)平衡(heng)式膨脹閥,大(da)的制冷系統(tong)中適合外(wai)平衡(heng)式膨脹閥。