簡要描述:螺桿(gan)式(shi)制(zhi)冷(leng)壓縮機(ji)是(shi)容積式(shi)制(zhi)冷(leng)壓縮機(ji)的(de)一種類型,它與活塞式(shi)制(zhi)冷(leng)壓縮機(ji)相比,具有(you)結構簡單(dan)、體積小、重量(liang)輕、易(yi)損件少、操作簡單(dan);單(dan)機(ji)壓比大;對濕壓縮不敏感。螺桿(gan)式(shi)冷(leng)水機(ji)它是(shi)由螺桿(gan)式(shi)制(zhi)冷(leng)壓縮機(ji)、冷(leng)凝器、節流裝置、潤滑油泵、電氣控制(zhi)箱以(yi)及(ji)其他部件組成的(de)組裝式(shi)制(zhi)冷(leng)機(ji)組,具有(you)結構緊湊(cou)、運(yun)行平穩、操作簡便、制(zhi)冷(leng)量(liang)無(wu)級調(diao)節、占地面積小等(deng)優點(dian),使用范圍廣,適合賓館、酒店、工廠、醫院等(deng)大型空調(diao)用
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螺桿式冷水(shui)機(ji)原理: 螺(luo)桿(gan)(gan)(gan)式(shi)冷(leng)(leng)(leng)(leng)水機(ji)因其關鍵部件-壓(ya)縮機(ji)采用螺(luo)桿(gan)(gan)(gan)式(shi)故(gu)名(ming)螺(luo)桿(gan)(gan)(gan)式(shi)冷(leng)(leng)(leng)(leng)水機(ji),機(ji)組由由蒸發器出來的(de)(de)(de)狀態(tai)(tai)為(wei)的(de)(de)(de)氣(qi)(qi)體冷(leng)(leng)(leng)(leng)媒;經壓(ya)縮機(ji)絕熱(re)壓(ya)縮以后,變(bian)成(cheng)(cheng)高(gao)溫高(gao)壓(ya)狀態(tai)(tai)。被壓(ya)縮后的(de)(de)(de)氣(qi)(qi)體冷(leng)(leng)(leng)(leng)媒,在冷(leng)(leng)(leng)(leng)凝(ning)(ning)器中(zhong),等壓(ya)冷(leng)(leng)(leng)(leng)卻冷(leng)(leng)(leng)(leng)凝(ning)(ning),經冷(leng)(leng)(leng)(leng)凝(ning)(ning)后變(bian)化成(cheng)(cheng)液(ye)態(tai)(tai)冷(leng)(leng)(leng)(leng)媒,再經節(jie)流閥(fa)膨脹到低(di)壓(ya),變(bian)成(cheng)(cheng)氣(qi)(qi)液(ye)混合(he)物。其中(zhong)低(di)溫低(di)壓(ya)下的(de)(de)(de)液(ye)態(tai)(tai)冷(leng)(leng)(leng)(leng)媒,在蒸發器中(zhong)吸收被冷(leng)(leng)(leng)(leng)物質的(de)(de)(de)熱(re)量,重新(xin)(xin)變(bian)成(cheng)(cheng)氣(qi)(qi)態(tai)(tai)冷(leng)(leng)(leng)(leng)媒。氣(qi)(qi)態(tai)(tai)冷(leng)(leng)(leng)(leng)媒經管(guan)道重新(xin)(xin)進入壓(ya)縮機(ji),開始新(xin)(xin)的(de)(de)(de)循環。這就是冷(leng)(leng)(leng)(leng)凍循環的(de)(de)(de)四個過程(cheng)。也是螺(luo)桿(gan)(gan)(gan)式(shi)冷(leng)(leng)(leng)(leng)水機(ji)的(de)(de)(de)主要工(gong)作原理。 螺桿式冷水機的應用 螺桿式冷水機的功率與相比渦旋式的相對較大,主要應用于中央空調系統或大型工業制冷方面 螺桿式冷水機的分類: 螺(luo)桿式冷水(shui)機按照散熱方式的(de)不(bu)同可分為水(shui)冷螺(luo)桿式冷水(shui)機和風冷螺(luo)桿式冷水(shui)機 螺桿式冷水機選用要點 產品選用要點 1. 螺桿式冷水機組的主要控制參數為制冷性能系數,額定制冷量,輸入功率以及制冷劑類型等。 2. 冷水機組的選用應根據冷負荷及用途來考慮。對于低負荷運轉工況時間較長的制冷系統,宜選用多機頭活塞式壓縮機組或螺桿式壓縮機組,便于調節和節能。 3. 選用冷水機組時,優先考慮性能系數值較高的機組。根據資料統計,一般冷水機組全年在100% 負荷下運行時間約占總運行時間的1/4 以下。總運行時間內100%、75%、50%、25% 負荷的運行時間比例大致為2.3%、41.5%、46.1%、10.1%。因此,在選用冷水機組時應優先考慮效率曲線比較平坦的機型。同時,在設計選用時應考慮冷水機組負荷的調節范圍。多機頭螺桿式冷水機組部分負荷性能優良,可根據實際情況選用。 4. 選用冷水機組時,應注意名義工況的條件。冷水機組的實際產冷量與下列因素有關: a) 冷水出水溫度和流量; b) 冷卻水的進水溫度、流量以及污垢系數。 5. 選用冷水機組時,應注意該型號機組的正常工作范圍,主要是主電機的電流限值是名義工況下的軸功率的電流值。 6. 在設計選用中應注意:在名義工況流量下,冷水的出口溫度不應超過15℃,風冷機組室外干球溫度不應超過43℃。若必須超過上述范圍時,應了解壓縮機的使用范圍是否允許,所配主電機的功率是否足夠。 |
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