制(zhi)冷(leng)的(de)主要目的(de)是降(jiang)低封(feng)閉(bi)空間和材料的(de)溫度，并(bing)保(bao)持降(jiang)低的(de)溫度，有時降(jiang)低相對濕度。冷(leng)卻這個術語通常是指任何自然(ran)或(huo)人工(gong)的(de)散熱過程

以(yi)食(shi)品工業為例，食(shi)品中微(wei)(wei)生(sheng)(sheng)物(wu)的(de)生(sheng)(sheng)長與溫(wen)度(du)(du)(du)密(mi)切相關。如果控制(zhi)溫(wen)度(du)(du)(du)，就可以(yi)控制(zhi)微(wei)(wei)生(sheng)(sheng)物(wu)的(de)生(sheng)(sheng)長。當溫(wen)度(du)(du)(du)低于10℃時，微(wei)(wei)生(sheng)(sheng)物(wu)的(de)生(sheng)(sheng)長速(su)度(du)(du)(du)明顯減慢。冷藏可以(yi)降低儲存食(shi)物(wu)中微(wei)(wei)生(sheng)(sheng)物(wu)的(de)產(chan)生(sheng)(sheng)速(su)度(du)(du)(du)，給我(wo)們帶來(lai)更加美味和(he)方便(bian)的(de)生(sheng)(sheng)活體驗(yan)。

   在(zai)工業生產中，物(wu)料的(de)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)發(fa)酵需要在(zai)零度或超低(di)(di)溫(wen)(wen)(wen)(wen)(wen)下進行，這是在(zai)室溫(wen)(wen)(wen)(wen)(wen)下無法(fa)完成(cheng)的(de)，因此制(zhi)(zhi)冷環(huan)節(jie)尤為關(guan)鍵什(shen)么是制(zhi)(zhi)冷系(xi)統(tong)?制(zhi)(zhi)冷系(xi)統(tong)由(you)壓(ya)(ya)(ya)(ya)縮機、冷凝器(qi)(qi)、節(jie)流元件和蒸(zheng)發(fa)器(qi)(qi)四個基本部件組(zu)成(cheng)。四個主要部件由(you)銅管按(an)一(yi)定(ding)順序連(lian)接(jie)，形成(cheng)一(yi)個封閉系(xi)統(tong)，系(xi)統(tong)內(nei)充有一(yi)定(ding)量的(de)制(zhi)(zhi)冷劑。氟(fu)(fu)利(li)昂(ang)和R22在(zai)過去(qu)被用作空調的(de)制(zhi)(zhi)冷劑以制(zhi)(zhi)冷為例，壓(ya)(ya)(ya)(ya)縮機從蒸(zheng)發(fa)器(qi)(qi)中吸出低(di)(di)溫(wen)(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)氣(qi)(qi)體，壓(ya)(ya)(ya)(ya)縮成(cheng)高溫(wen)(wen)(wen)(wen)(wen)高壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)氣(qi)(qi)體，流經毛(mao)細管，節(jie)流成(cheng)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)汽液兩相，低(di)(di)溫(wen)(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)液再吸收蒸(zheng)發(fa)器(qi)(qi)內(nei)室內(nei)空氣(qi)(qi)的(de)熱量，變成(cheng)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)氣(qi)(qi)體，低(di)(di)溫(wen)(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)氟(fu)(fu)利(li)昂(ang)氣(qi)(qi)體由(you)壓(ya)(ya)(ya)(ya)縮機吸入。

   室(shi)內空氣通過蒸(zheng)發(fa)器釋放熱(re)(re)量(liang)(liang)，空氣溫(wen)度(du)下降(jiang)。這樣重復壓縮冷(leng)凝節(jie)流(liu)蒸(zheng)發(fa)的(de)循環(huan)，制(zhi)(zhi)(zhi)冷(leng)劑(ji)不斷地帶走室(shi)內空氣的(de)熱(re)(re)量(liang)(liang)，從而(er)降(jiang)低制(zhi)(zhi)(zhi)冷(leng)系統的(de)室(shi)溫(wen)。壓縮冷(leng)凝節(jie)流(liu)蒸(zheng)發(fa)是(shi)制(zhi)(zhi)(zhi)冷(leng)工藝的(de)四(si)大要素，而(er)完成這一(yi)工藝的(de)設(she)備(bei)就(jiu)是(shi)制(zhi)(zhi)(zhi)冷(leng)設(she)備(bei)。為了使(shi)制(zhi)(zhi)(zhi)冷(leng)更加人性化(hua)和智能化(hua)，現代制(zhi)(zhi)(zhi)冷(leng)技術通常增加一(yi)些集成模(mo)塊來實現智能操(cao)作界面、遠程控(kong)制(zhi)(zhi)(zhi)和電路保(bao)護裝置等一(yi)系列(lie)功能。