Defrosting control method and refrigeration cabinet

Abstract

The invention discloses a defrosting control method and a refrigeration cabinet. The defrosting control method includes the steps of recording the refrigerating and cooling time when a refrigerating system is in a refrigerating and cooling mode, detecting an inlet temperature T1, an outlet temperature T2, an air inlet temperature T3 and an air outlet temperature T4 of a heat exchanger, performingdefrosting determining when T1 is smaller than 0, continuing to detect T1 when T1 is larger than 0, starting to perform defrosting when T2 is larger than 0 and the refrigerating and cooling time t islarger than or equal to a first preset time value t1 or when T2 is smaller than 0 and the refrigerating and cooling time t is larger than or equal to a second preset time value t2 or when the difference between T3 and T4 is smaller than a preset value K, and ending the defrosting when the surface temperature of the heat exchanger reaches a temperature preset value T. Compared with the prior art, defrosting determining can be more accurate by detecting whether frosting happens to an evaporator, the refrigerating system cannot perform defrosting by mistake or not in time, and the aims of precisely controlling defrosting and saving energy are realized.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a defrosting control method and a refrigerator. Background technique [0002] At present, the refrigerators on the market adopt the time-interval natural defrosting mode when defrosting, that is, defrosting is performed every once in a while. The defrosting termination condition is the termination of temperature or time. When defrosting, the unit compressor stops. For refrigeration, the fan of the air curtain cabinet continues to run, and the return air of about 14°C is used to heat the evaporator, and the temperature of the evaporator continues to rise to about 11°C, so as to achieve the effect of defrosting. However, during the defrosting process of existing refrigerators, the temperature inside the cabinet will rise sharply to about 11°C; what is important is that in some occasions where the temperature and humidity are low, the evaporator does not have frosting, and it ...

AI Technical Summary

Problems solved by technology

However, during the defrosting process of existing refrigerators, the temperature inside the cabinet will rise sharply to about 11°C; what is important is that in some occasions where the temperature and humidity are low, the evaporator does not have frosting, and it is still Using the time-interval natural defrosting mode will lead to ineffective defrosting; at the same time, in some places with high temperature and humidity, the evaporator frosting is very serious. At this time, still using the time-interval natural defrosting mode may cause the frost to be unable to be completely removed.

Obviously, the time-interval defrosting mode cannot be adapted to various types, so that the actual temperature in the cabinet is already higher than the temperature required by the product, resulting in shortened storage time of the product. Therefore, the defrosting mode of the existing refrigerator cannot meet the actual use needs of users. Problems such as wrong defrosting or untimely defrosting will not only waste energy but also cause economic losses to users

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