Automatic defrosting control method for frost free refrigerator

Abstract

The invention discloses an automatic defrosting control method for a frost free refrigerator. The method comprises a step of: intelligently judging a defrosting pointcut, namely testing evaporation temperature, refrigerating chamber temperature, environment temperature and real-time running state of the refrigerator, judging the attenuation degree of the heat exchange capacity of an evaporator ofthe refrigerator according to a set algorithm of the control method, and further judging the defrosting pointcut to automatically control the defrosting process. By the method, defrosting cut accuracy and exit timeliness are realized, the energy efficiency level and refreshing quality of the refrigerator are improved, and the intelligent control level of the refrigerator is improved.

Description

technical field [0001] The invention relates to an automatic control system for a frost-free refrigerator, in particular to a control rule for automatic defrosting of a frost-free refrigerator and a control system for realizing automatic defrosting. Background technique [0002] The frost-free refrigerator uses the forced convection heat exchange method to organize the air in the refrigerator and freezer to flow through the evaporation chamber to exchange heat and moisture with the evaporator, and form the air circulation in the refrigerator. With the continuation of the operation time of the refrigerator, the frost layer on the surface of the evaporator gradually thickens. A thicker frost layer not only affects the heat exchange efficiency of the evaporator, but also produces a large flow resistance, which increases energy consumption and affects the quality of preservation. Therefore, The defrosting control technology of frost-free refrigerators is of great significance to...

AI Technical Summary

Problems solved by technology

According to the above-mentioned existing defrosting control rules, the accumulative running time of the compressor can be a fixed value, or it can be increased or decreased with the change of other control parameters, but these control rules can only infer an empirically appropriate defrosting control rule. The frost interval time allows the refrigerator to defrost "on time", but the actual working state of the refrigerator will change at any time with the environment and user usage conditions, so this control rule cannot detect the actual heat transfer performance of the refrigerator evaporator in real time, and according to the evaporator When defrosting due to changes in heat transfer performance, it is easy to perform defrosting operation when the actual cooling effect of the refrigerator is good, and not to defrost for a long time when the cooling effect deteriorates. On the one hand, it wastes electric energy and also affects the freshness preservation function of the refrigerator.

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