Defrost control method, device and refrigeration equipment using the method and device

Abstract

The invention provides a defrosting control method used for a refrigerating device. The refrigerating device comprises an evaporation chamber and a refrigerating chamber. An evaporator and a draught fan are arranged in the evaporation chamber. The defrosting control method for the refrigerating device is characterized by comprising the following steps that S1, whether the evaporator completes defrosting or not is judged; and S2, if the evaporator completes defrosting, the evaporator is stopped being heated, the draught fan is controlled to rotate backwards, cold air in the refrigerating chamber is led into the evaporation chamber so that hot air generated by defrosting can be blown out of the evaporation chamber, and the evaporator is cooled. In the time period from defrosting of the evaporator to refrigerating running recovering, the draught fan rotates backwards to directly discharge hot air generated by defrosting out of the evaporation chamber, then the evaporator is started againfor refrigerating so that the cold capacity generated by the evaporator can be completely applied to the refrigerating chamber, cold capacity consumption is avoided, and a certain energy-saving effectis achieved; and in addition, fast cooling of the evaporator is facilitated by means of the process that the draught fan rotates backwards to discharge hot air, and the time interval from defrostingcompleting to refrigerating recovering of the evaporator is shortened.

Description

Technical field [0001] The invention relates to the field of refrigeration equipment, and in particular to a defrosting control method, a defrosting device, and refrigeration equipment using the method and the device. Background technique [0002] After the existing air-cooled refrigerator has been running for a period of time, because the water vapor carried in the return air from the compartment will condense on the evaporator, when the condensed water stays on the evaporator for a long time, it will gradually form frost. When the frost layer reaches a certain thickness It is necessary to stop the machine to defrost the evaporator; at this stage, the commonly used method of defrosting is to arrange an electric heating wire on the lower end or surface of the evaporator. When the defrost is needed, the electric heating is turned on, and the heat generated by the electric heating is melted and evaporated. Until the frost on the evaporator is detected to melt (usually the temperatu...

AI Technical Summary

Problems solved by technology

But at this time, due to the heat generated by the electric heating during the defrosting process, the hot air rises and gathers at the upper end of the evaporator. If it is directly turned on for cooling operation, all the hot air will flow into the storage compartment, causing severe fluctuations in the temperature of the compartment ( rise), and to reduce the temperature in the chamber to the set temperature during this time, it will consume part of the cooling capacity of the evaporator, resulting in waste

[0003] In order to avoid the influence of the hot air generated by the evaporator after defrosting on the compartments of the existing refrigerators, the evaporator is generally operated for a period of time for refrigeration, so that the temperature in the evaporator cabin is lowered to a certain temperature, and then the compartment air door and The fan supplies air to cool the compartment. Although this method can avoid the influence of defrosting heat on the compartment, it still requires the evaporator to run for a period of time to reduce the temperature of the evaporator cabin, which will inevitably affect the cooling capacity to a certain extent. waste

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