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孟津縣離心式冷水機組中的過濾器具體起到哪些作用(2)

2022-11-29

制冷機

冷水機組

工業制冷設備

進入冷凝盤管的高溫氣態制冷劑通過盤管壁與盤管外側噴淋水和空氣進行熱交換,制冷劑氣體的溫度隨著在管內的時間加長而下降,由氣態逐漸變成液態。用風機**風力,使噴淋水充分覆蓋在盤管外表面上,從而提高了換熱效率。噴淋水和空氣吸收盤管壁的熱量后溫度升高,部分水由液態變成氣態,帶走管壁上大量熱量,濕熱空氣中的水份被擋水板截住引入PVC熱交換層中,熱空氣排出。PVC熱交換層中的水被流過的新風冷卻,溫度降低,流入集水槽中,再由水泵送入噴淋系統中,繼續循環。散失到空氣中的水份由水位控制裝置自動調節補充。

   截止閥的選型和配置主要基于冷熱一體冷水機的運行工況,即常用的溫度和壓縮機的功率。家用空調和小型冷熱一體冷水機通常使用毛細管作為截流器,毛細管的直徑和長度要根據壓縮機的功率和工作溫度來確定。原則上,功率越小,毛細管越長,口徑越小,工作溫度越低,毛細管就越長。其他型號通常使用膨脹閥作為截流裝置。膨脹閥分為外部平衡閥、內部平衡閥和電子膨脹閥。外部平衡是最廣泛的一個。通過檢測低壓回端溫度,自動調節閥門開度,達到佳制冷效果,內部平衡多采用低溫、超低溫低溫裝置。閥門的尺寸通過內置的壓力平衡管進行調整。電子膨脹主要用于變頻機組,根據設定的溫度和工作條件來調整壓縮機的工作頻率。還安裝了電子膨脹裝置,根據控制系統的數據反饋和蒸發器進出口的過熱,自動調節開啟度

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