Adaptive defrosting control method and device

Abstract

The invention discloses an adaptive defrosting control method and device, and relates to the technical field of defrosting of refrigerators. The adaptive defrosting control device comprises a timing unit, a detection unit, a recording unit, a calculating unit and a control unit. The adaptive defrosting control method comprises the steps that the time interval Hi of defrosting, the humidity RHj ofan air return port, and the accumulative working time Ti of an air compressor are monitored; and values of the humidity of the air return port RHj are added to figure out the average; a predicted value Di of a frosting thickness is established, the heat-exchange capacity and frosting degree of an evaporator are predicted, defrosting is started, the time ti from the starting of defrosting to the end of defrosting is monitored, and the next defrosting time interval is updated. According to the adaptive defrosting control method and device, weighting accumulated values of the humidity of the airreturn port of a controlled room and of the accumulative working time of the air compressor are monitored to serve as judgment criteria so that the heat-exchange capacity and frosting degree of the evaporator can be predicted more accurately, then the next defrosting time interval is updated to enable the defrosting frequency adapt to the actual service condition of a refrigerator, and the purposes of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention belongs to the technical field of refrigerator defrosting, in particular to an adaptive defrosting control method and a device thereof. Background technique [0002] Frost on the evaporator will seriously affect the heat exchange capacity of the evaporator. Conventional defrosting control generally controls the defrosting of the heater according to the method of setting a specific time, for example, according to the accumulated running time of the compressor or the door opening time reaching the preset value, Start the heater to defrost. This kind of defrosting control does not defrost according to the actual frosting situation. According to the different usage environments of the refrigerator, when the accumulative running time of the compressor or the door opening time is the same, the degree of frosting on the evaporator will be different. Do not start defrosting when defrosting should not be used to waste electricity. [0003] In o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an adaptive defrosting control method, by monitoring the humidity at the return air outlet of the controlled room and the weighted cumulative value of the cumulative running time of the compressor as the basis for judgment, the heat transfer capacity and performance of the evaporator can be more accurately predicted. Then adjust the duration of the next defrost interval cycle according to the defrost duration of the previous defrost cycle, which solves the existing problems of not being able to defrost in time and wasting electric energy

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