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(peng)脹閥安裝在蒸發器入(ru)口，常(chang)稱為膨(peng)脹閥，主要(yao)作(zuo)用有兩個:

1. 節流(liu)作(zuo)用:低(di)溫高壓(ya)的(de)(de)液態制冷(leng)劑經過膨脹閥的(de)(de)節流(liu)孔節流(liu)后(hou)，成(cheng)為低(di)溫低(di)壓(ya)的(de)(de)霧狀(zhuang)的(de)(de)液壓(ya)制冷(leng)劑，為制冷(leng)劑的(de)(de)蒸發創造條件;

2. 控制(zhi)(zhi)(zhi)(zhi)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)的流(liu)(liu)(liu)量(liang):進入蒸(zheng)(zheng)(zheng)發器(qi)(qi)的液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)，經過(guo)蒸(zheng)(zheng)(zheng)發器(qi)(qi)后，制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)由(you)液(ye)態(tai)(tai)蒸(zheng)(zheng)(zheng)發為氣態(tai)(tai)，吸收熱量(liang)，降低車內(nei)的溫度。膨脹閥控制(zhi)(zhi)(zhi)(zhi)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)的流(liu)(liu)(liu)量(liang)，保證蒸(zheng)(zheng)(zheng)發器(qi)(qi)的出(chu)(chu)口完全為氣態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)，若(ruo)流(liu)(liu)(liu)量(liang)過(guo)大，出(chu)(chu)口含有液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)，可能(neng)進入壓縮機產(chan)生液(ye)擊(ji);若(ruo)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)流(liu)(liu)(liu)量(liang)過(guo)小，提前蒸(zheng)(zheng)(zheng)發完畢，造成制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)不足;

3.熱力膨脹閥分為外平(ping)衡(heng)和內平(ping)衡(heng)兩種，在小型制冷系統中適(shi)合內平(ping)衡(heng)式(shi)膨脹閥，大的(de)制冷系統中適(shi)合外平(ping)衡(heng)式(shi)膨脹閥。