【導讀】核準通過，歸檔資料。未經(jīng)允許，請勿外傳！入鋼材后需要及時的對鋼材表面進行處理，達到防銹的目的。實踐表明，鋼材表。為核心，表面快速生銹，進而銹蝕到內(nèi)部，影響鋼材性能。內(nèi)賣不掉，時間長了就會生銹，不生產(chǎn)鋼材，就面臨著倒閉?；诖朔N狀況，一。為鋼材廠家提供足夠的緩沖時間，同時，表面不生銹也能成為其一大賣點。失效，因此，需要對藥箱進行降溫。須和余熱量平衡，且隨著鋼材生產(chǎn)速度變化，制冷量也能夠相應自動控制。

　　

【正文】 re timely processing of steel surface in the purchase of steel products, achieving the purpose of rust. Practice shows that the rust points on the steel surface with no rust treatment began to appear in 7 to 10 days. Then the steel surface rust rapidly taking the rust points as core, even corrode the internal steel, which impact properties of steel. At present, the steel market is sluggish. Many steel manufacturers are faced with a dilemma: if producing steel products can not sell out in the short term, it will rust after a long time, if not producing steel, the Steel plant is faced with collapse. Based on this condition, a rust inhibitor for steel surfaces has been developed, this potion can spray on the surface before the steel cooling bed, so as to achieve antirust purposes, under normal circumstances, the antirust time can be achieved around eight times as long as untreated steel, so that it can offer enough buffer time for steel manufacturers, at the same time, the surface being not rust can bee one big selling point. Steel surface is, however, before entering the cooling bed, the surface temperature reaches 450℃ or so, and the collection of fluid temperature will be also very high, which lead to rising temperature in the whole cabi. Eventually that will make anti rust inhibitor carbide lose efficacy. Therefore, they need to cool medicine cabi. The purpose of this subject is to design the refrigeration system that can make the internal temperature of medicine cabi constant , refrigerating capacity and residual heat must be in a balance. What is more, with changes in the rate of steel production, the refrigerating capacity can be also a corresponding automatic control. Keywords: refrigeration system。 double temperature double control。 automatic control system ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ i 目 錄 1 緒論 .............................................. 1 課題研究目的 ................................................. 1 制冷機簡介 ................................................... 1 工作原理 ............................................... 2 制冷機的種類 ........................................... 3 壓縮式制冷機 ...................................... 3 吸收式制冷機 ...................................... 4 小型制冷機發(fā)展現(xiàn)狀及新技術(shù) ................................... 4 壓縮機 ................................................. 4 換熱器 ................................................. 5 小型制冷機自動測試系統(tǒng)的組成 ................................. 5 制冷機的啟動 ................................................. 6 壓縮機電機工作原理 ..................................... 6 單相電機常用啟動型式 ................................... 6 電阻分相啟動 (RSIR) ............................... 6 電容分相啟動 (CSIR) ............................... 6 電容啟動、電容運轉(zhuǎn)型 (CSR) ........................ 7 現(xiàn)有啟動方式比較及其與啟動繼電器的配合 ................. 7 三種啟動方式比較 ................................. 7 與啟動繼電器的配合 ............................... 7 彈力式啟動繼電器 ............................ 7 重錘式啟動繼電器 ............................ 7 PTC 啟動繼電器 .............................. 8 制冷機的腐蝕與保護 ........................................... 8 制冷機低溫泵的故障及排除 ..................................... 9 關(guān)于小型制冷裝置的模擬研究 .................................. 11 小型制冷機的發(fā)展方向 ........................................ 11 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ii 2 制冷方法和系統(tǒng)的選擇 .............................. 13 制冷方法的選擇 .............................................. 13 壓縮式制冷 ............................................ 13 熱電制冷 .............................................. 13 擴散 吸收式制冷 ....................................... 15 制冷系統(tǒng)的選擇 .............................................. 16 3 鋼鐵防銹劑藥箱箱體的設計計算 ....................... 17 小型制冷裝置的分類 .......................................... 17 箱體設計要求及形式 .......................................... 18 箱體厚度設計及外表面溫度 校核 ................................ 18 鋼鐵防銹劑藥箱保溫層設計 .............................. 18 藥箱外表面溫度校核 .................................... 20 4 小型制冷機冷凝器設計計算 ........................... 22 制冷機組冷凝器作用及種類介紹 ................................ 22 冷凝器熱負荷的確定 .......................................... 23 空冷式冷凝器的設計計算 ...................................... 23 5 小型制冷機蒸發(fā)器設計計算 ........................... 31 蒸發(fā)器在制冷循環(huán)中的作用及常用類型 .......................... 31 蒸發(fā)器的設計計算 ............................................ 32 6 小型制冷機壓縮機的選擇 ......................... 38 制冷壓縮機的分類 ............................................ 38 主要制冷壓縮機的功能介紹 .................................... 39 往復式制冷壓縮機 ...................................... 39 轉(zhuǎn)子式制冷壓縮機 ...................................... 40 渦旋式壓縮機 .......................................... 40 螺桿式壓縮機 .......................................... 41 壓縮機的選擇和主要參數(shù)的確定 ............................... 41 7 小型制冷機毛細管的選型 ............................ 44 節(jié)流裝置的選擇 .............................................. 44 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ iii 毛細管型號的確定 ............................................ 46 8 小型制冷機輔助設備的選擇 ........................... 47 回熱器的設計選型 ............................................ 47 循環(huán)回熱器作用分析 .................................... 49 制冷系統(tǒng)的回熱器計算 .................................. 49 干燥 過濾器的選型 ............................................ 52 貯液器的選型 ................................................ 53 制冷劑最佳充注量的確定 ......................................