Non-frost refrigerator control system and defrosting control method thereof

Abstract

The invention relates to a control system for a frost-free refrigerator, which comprises a singlechip processor, and a refrigerating chamber temperature sensor, a freezing chamber temperature sensor, an evaporator temperature sensor and a door switch signal which are connected with the singlechip processor respectively, wherein the singlechip processor is respectively connected with a compressor, a fan motor, a defrosting heater and an electric air door through a drive circuit. The control system for the frost-free refrigerator also comprises an air outlet temperature sensor which is connected with the singlechip processor, wherein the air outlet temperature sensor is arranged on an air outlet of the fan motor of an evaporator. The invention also comprises a defrosting control method for the control system of the frost-free refrigerator, which can control the refrigerator to perform heating defrosting only when the frosting degree of the evaporator influences the refrigerating effect by taking the temperature difference of the evaporator temperature sensor and the air outlet temperature sensor as the basis for judgment, and is not influenced by the ambient humidity and the service condition. Under the condition of actual use, the control system and the defrosting control method can reduce the energy consumption of the refrigerator and the temperature fluctuation in the refrigerator, and achieve the aim of improving the complete machine performance of the refrigerator.

Description

technical field [0001] The invention relates to the field of refrigerator manufacturing, in particular to a control system for a frost-free refrigerator. The invention also relates to the defrosting control method of the frost-free refrigerator control system. technical background [0002] The refrigerator runs through the compressor to make the evaporator absorb heat for cooling, and the operation of the fan motor makes the cold air on the evaporator circulate to all parts of the box. However, frost will accumulate on the surface of the evaporator after cooling for a period of time. If the frost layer is too thick, the heat exchange will deteriorate and the cooling performance will deteriorate. Therefore, the frost accumulation on the surface of the evaporator must be removed to ensure the performance of the refrigerator. In the prior art, the control system of the frost-free refrigerator includes an automatic frosting process, which does not require the user to remove the...

AI Technical Summary

Problems solved by technology

For example, when the cumulative working time is used as the basis for judgment, when the environment is dry, the door is rarely opened or there is little food in the box, when the accumulated time is up, there is actually little frost on the evaporator, and there is no need to defrost at this time. Heating and defrosting makes the temperature in the box rise and fluctuate, and at the same time cause a waste of electric energy

Or under certain conditions such as high humidity environment, poor door seal, and high moisture content of food, the evaporator has been severely frosted before the accumulated time, and the refrigeration efficiency of the refrigerator is low due to excessive frosting, which causes the refrigerator to consume electricity volume increase

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