[格力空调维修] 第7章-柜式空调器基础知识-第1节-连接线和毛细管位置

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第1节 连接线和毛细管位置

一、室内外机连接线

1.连接线数量

室外机共有4束连接线,见图7-1(a),其中两束引线接电源接线端子、两束引线接对接插头。

室内机共有3束连接线,见图7-1(b),其中一束接电源接线端子、两束为对接插头。

2.电源线

室外机共有两束电源线连至接线端子,见图7-2(a),两束电源线并联。其中的一束接空气开关为整机供电,一束连接至室内机为室内机供电。

室内机共有一束电源线,见图7-2(b),连接至室外机接线端子,室内机的供电由室外机提供。

每束电源线共有5根引线,3根相线接L1(棕线)、L2(黑线)、L3(紫线),一根零线接N(蓝线),一根地线接地(黄绿线)。

图7-1 连接线数量

图7-1 连接线数量

图7-2 电源线

图7-2 电源线

3.方形对接插头

室外机和室内机各有一个相同的方形对接插头,见图7-3,由一束5根引线连接,室外机插头连接负载,室内机插头连接至主板强电电路。

4.扁形对接插头

室外机和室内机各有一个相同的扁形对接插头,见图7-4,由一束4根引线连接,室外机插头连接室外环温、室外管温、压缩机排气共3个传感器,室内机插头连接至显示板弱电电路。

图7-3 方形对接插头

图7-3 方形对接插头

图7-4 扁形对接插头

图7-4 扁形对接插头

二、毛细管位置

1.室外机制冷系统

制冷模式下制冷剂从冷凝器出口经干燥过滤器、单向阀,直接到二通阀,节流部分只有单向阀和并联的辅助毛细管,并未设计节流用的主毛细管,见图7-5。

2.室内机制冷系统

可发现毛细管位于室内机,见图7-6,由4路并联组成,2端均连接干燥过滤器,安装在细管回路中。制冷模式下制冷剂流程:细管(接室外机二通阀)→干燥过滤器→毛细管→干燥过滤器→莲花头(8路分配器)→蒸发器→粗管(接室外机三通阀)。

图7-5 制冷剂流向

图7-5 制冷剂流向

图7-6 毛细管安装位置

图7-6 毛细管安装位置

3.二通阀和三通阀状态

5P柜式空调器毛细管位于室内机,见图7-7(a),因此细管为真正意义的高压管,制冷模式下正常运行时,二通阀干燥且手摸较热、三通阀结露且手摸较凉。

常见1~1.5P的挂式空调器、2~3P的柜式空调器,见图7-7(b),毛细管设计在室外机,细管压力和粗管压力相同,均为约0.45MPa的低压,因此细管不是真正意义的“高压管”,只是约定俗成的叫法,制冷模式下正常运行时,二通阀和三通阀均结露。

格力早期的某些型号2P或3P空调器,毛细管有设在室内机的;目前部分型号(或其他品牌)的5P空调器,毛细管也有设在室外机的。

图7-7 正常制冷时二通阀和三通阀状态

图7-7 正常制冷时二通阀和三通阀状态


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