Return air defrosting control method for air-cooled full refrigerated container

Abstract

The invention discloses a return air defrosting control method for an air-cooled full refrigerated container. The return air defrosting control method for the air-cooled full refrigerated container comprises the following steps that S1, a controller calculates the continuous running time t1 of a compressor, if t1 is greater than or equal to ta, the compressor stops running and the step S5 is executed, and if t1 is smaller ta, the compressor continues running until a refrigerating chamber reaches the shutdown temperature, the compressor stops running and the step S2 is executed; S2) the openingtimes K0 of a refrigerating chamber door in a first defrosting period is calculated, and the opening times K0 is compared with the defrosting target time table of the opening times to obtain the defrosting target time tm of the current opening times; S3) the cumulative running time t2 of the compressor in the first defrosting period is detected, if t2 is greater than or equal to tm, the step S5 is executed, and if t2 is smaller tm, the step S4 is executed; S4) a fan is kept running until the temperature T0 of a defrosting temperature sensing head is greater than or equal to Tmb, and the stepS6 is executed; S5) the fan is kept running until the temperature T0 of the defrosting temperature sensing head is greater than or equal to Ta, the step S6 is executed; and S6) the fan stops running.According to the return air defrosting control method for the air-cooled full refrigerated container, defrosting is conducted after the compressor is stopped, defrosting is conducted through heat return, the interior of the refrigerator is continuously cooled through residual cold of an evaporator, and energy consumption of the whole refrigerator can be reduced.

Description

technical field [0001] The invention relates to the technical field of refrigerator control methods, in particular to a method for controlling the weathering and defrosting of an air-cooled full refrigerator. Background technique [0002] For defrosting and frost-free refrigerators with circulating air, generally the fan of the refrigerator not only circulates the cold air generated by the evaporator when the refrigerator compressor is cooling, to cool down the refrigerator, but also because the fan of the refrigerator is in the compressor. When shutting down, use the high-temperature gas in the refrigerator to wash the frost layer on the evaporator. Its significance is: because the temperature of the refrigerating room is generally in the range of 2-10 ℃, and the temperature of the evaporator of the refrigerator is generally below 0 ℃ when the compressor is stopped, the evaporator can be cleaned by using the high-temperature gas in the refrigerating room. Frost. Secondly,...

AI Technical Summary

Problems solved by technology

However, in the prior art, the defrosting operation of the evaporator is to defrost before the compressor is turned on, and the temperature difference between th

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