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專業(yè)研發(fā)、生產(chǎn)、銷售制冷設(shè)備及空調(diào)設(shè)備
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制冷系統(tǒng)排污方法
發(fā)布日期：2023-05-23 18:16:36瀏覽量：165
制冷設(shè)備安裝后，內(nèi)部仍不可避免地會有焊渣、鐵屑、氧化物、砂子等殘留在系統(tǒng)內(nèi)，為不使閥門、機組受損，避免過濾器、管道堵塞，在機組運行前必須非污，排污通常采用壓力氣體對管道、系統(tǒng)吹除的方法，吹除壓力為0.6MPa。吹除工作可用壓縮機、空壓機、氮氣瓶等作為氣源。對于氟利昂系統(tǒng)，吹除工作最好用氮氣進行，因為氟利昂對系統(tǒng)的含水量要求高，用壓縮空氣勢必會帶進水分，而氮氣無腐蝕、無水分、不燃不爆、 價格低廉，操作使用方便。
排污工作可分管段、樓層進行。排污口應(yīng)設(shè)在各段的最低處，排污時，將系統(tǒng)所有接觸外界大氣的閥門全部關(guān)閉，其余閥門全開。在排污口可用木塞將所需吹除管段的口堵上（為安全起見，木塞用鐵絲栓牢，或用麻袋套牢木塞，以防木塞飛出傷人)。當壓力達到0.6MPa時，將木塞打掉，使氣體迅速排出，以排出管道內(nèi)的污物和水分。這樣如此反復(fù)一至三次，直至將污物、水分除盡為止。排污工作應(yīng)連續(xù)循序進行，直至全部清除。
排污的檢查方法如下：放氣時，在排污口的150-200mm處，放一塊浸濕的白紗布或未干的白油漆板，氣體吹過后無明顯的污點為合格，在排污過程中，應(yīng)盡量少開關(guān)閥門，以防污物損壞閥門的密封線。系統(tǒng)排污結(jié)束后，應(yīng)拆卸清洗過濾器及閥門的閥心。
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