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分析冷庫溫度下降緩慢的兩大原因
Analysis of the two main causes of cold storage temperature drops slowly
1、蒸發器中存在較多的空氣或冷凍油，傳熱效果下降
1, evaporator in more air or frozen oil, heat transfer effect
一旦蒸發器傳熱管內表面附上了較多的冷凍油，其換熱系數將會減小，同樣，若傳熱管中存在較多的空氣，蒸發器的換熱面積減小，其傳熱效率也會明顯下降，庫房溫度下降速度就隨之減緩。食品冷庫
Once attached on the surface of the evaporator heat transfer tube more frozen oil, its heat transfer coefficient will decrease, also, if there is more air in the pipe, the evaporator of the heat exchange area decreases, and its heat transfer efficiency will be significantly lower, the storehouse temperature decreasing speed is slow.
因此，在日常運行維護中，應注意及時清除蒸發器傳熱管內表面油污和排出蒸發器內的空氣，以提高蒸發器傳熱效率。
In daily operation maintenance, therefore, should pay attention to keep clear of the evaporator heat transfer tube surface oil and discharge the air inside the evaporator, heat transfer efficiency in order to improve the evaporator.
2、蒸發器表面結霜太厚或積塵過多，傳熱效果下降
2, the evaporator surface frost is too thick or too much dust, heat transfer effect
導致庫溫下降緩慢的另一重要原因是蒸發器傳熱效率低，這主要是由于蒸發器表面霜層過厚或積塵過多引起的。
Lead libraries temperature is another important reason for the slow decline in evaporator heat transfer efficiency is low, this is mainly due to the too thickness of evaporator surface frost layer or dust caused by too much.
由于中山冷庫蒸發器的表面溫度大多低于0℃，而庫房濕度相對較高，空氣中的水分極易在蒸發器表面結霜，甚至結冰，影響蒸發器的傳熱效果。
Due to zhongshan refrigerator evaporator surface temperature are lower than 0 ℃, relative humidity and warehouse is higher, the moisture in the air extremely easy in the evaporator surface frost, ice, even influence the effect of heat transfer in the evaporator.
為防止蒸發器的表面霜層過厚，需定期對其進行除霜。下面介紹兩種較簡單的除霜方法：
In order to prevent the surface of the evaporator frost layer thickness, on a regular basis to defrost. Here are two simpler defrosting method:
①停機融霜。即停止壓縮機運轉，打開庫房門，讓庫溫回升，待霜層自動融化后，再重新啟動壓縮機。
1) stop defrost. Which stop the compressor operation, and opened the door of storeroom, let the library temperature picks up, after being automatic melting frost layer, then restart the compressor.
②沖霜。將庫房中的貨物搬出后，直接用溫度較高的自來水沖洗蒸發器排管表面，使霜層溶解或脫落。
(2) cream. After the goods out of warehouse, with higher temperature of tap water rinse directly evaporator tube surface, to dissolve frost layer or fall off.
除了結霜過厚會導致蒸發器傳熱效果不佳外，蒸發器表面因長期未清掃而積塵過厚，其傳熱效率也會明顯下降。

In addition to the frost too thick will lead to poor performance of the evaporator heat transfer, the evaporator surface due to long-term not cleaning the dust too thick, its heat transfer efficiency will be significantly decreased.

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