1, freezer for insulation or sealing function is poor, leading to the cold loss big

Heat insulation function difference is because of pipeline, warehouse insulation wall insulation layer thickness is not enough, heat insulation and heat preservation effect is bad, it is primarily designed for thermal insulation layer thickness selection of inappropriate or construction insulation materials of poor quality caused by. Open the door should be avoided as far as possible, avoid a lot of hot air entering the warehouse. Of course, the warehouse into inventory frequently or purchase amount is too large, the heat load increases rapidly, to be cooled to temperatures usually needs a long time rules.

2, freezer transpiration device appearance frosting too thick or the dust too, reduce the heat transfer effect

Temperature decrease slowly led to another important reason is that the transpiration heat transfer power is low, this is mainly because the transpiration device looks the frost layer too thick or dust caused by too much. The following describes two kinds of relatively simple defrosting method:①stop defrosting. That suspends the compressor works, opened a warehouse door, let the temperature rise, the frost layer active after ablation, and then restart the compressor. The defrosting. The warehouse goods moved out, direct use of higher temperature of water erosion transpiration apparatus pipe appearance, make cream layer is dissolved or fall.

3, transpiration is put in more air or oil, heat transfer reduction
Once the heat transfer tube inner surface transpiration attach more oil, the heat transfer coefficient will decrease, the same, if the heat transfer tubes in the presence of many air, transpiration exchanger area decreases, its heat and power will be significantly reduced, warehouse temperature decrease speed slowed. Thus, in ordinary job protection, should notice to eradicate the transpiration heat transfer tube inner surface of oil pollution and discharge transpiration in air, in order to improve heat transfer power of transpiration.

4, a throttle valve regulating improper or obstruction, the refrigerant flow is too small or too big
Throttle valve regulating improper or obstruction, will directly affect the flow of refrigerant into the transpiration. Ice block is as boring boring effect is poor, the refrigerant containing water, flowing through the throttle valve, the temperature dropped to 0℃ below, in the refrigerant water into ice and blocking throttle valve hole; dirty block because the throttle valve inlet accumulated on the filter more dirt, refrigerant circulation is not smooth, constitute obstruction.

5, system of refrigeration dose deficiency, lack of refrigeration
Circulating mass of refrigerant deficiency there are two main reasons, one is the refrigerant charging quantity deficiency, at the moment, just fill in enough refrigerant can be. Another reason is, refrigerant leakage system more, in this situation, you should find the leak point view, each pipeline, valve connection, detect leak site after patch, and sufficient refrigerant.