Defrost control method and refrigerator

Abstract

The invention discloses a defrosting control method and a refrigerator. The defrosting control method includes: when the refrigeration system is in the cooling and cooling mode, recording the cooling and cooling time, and detecting the inlet temperature T of the heat exchanger 1 , outlet temperature T 2 , air inlet temperature T 3 and outlet temperature T 4 , when T 1 <0, the defrosting judgment will be carried out, when T 1 >0, continue to detect T 1 ; when T 2 > 0 and cooling down time t 运 ≥ the first preset time value t 1 when T 2 <0 and the cooling time t 运 ≥ second preset time value t 2 when or when T 3 -T 4 When it is less than the preset value K, start defrosting; when the surface temperature of the heat exchanger reaches the temperature preset value T 设 , end defrosting. Compared with the prior art, the present invention detects whether the evaporator is frosted, so that the defrosting judgment is more accurate, and the refrigeration system will not experience wrong defrosting or untimely defrosting, so as to achieve both precise control of defrosting and energy saving. energy purpose.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a defrosting control method and a refrigerator. Background technique [0002] At present, the refrigerators on the market adopt the time-interval natural defrosting mode when defrosting, that is, defrosting is performed every once in a while. The defrosting termination condition is the termination of temperature or time. When defrosting, the unit compressor stops. For refrigeration, the fan of the air curtain cabinet continues to run, and the return air of about 14°C is used to heat the evaporator, and the temperature of the evaporator continues to rise to about 11°C, so as to achieve the effect of defrosting. However, during the defrosting process of existing refrigerators, the temperature inside the cabinet will rise sharply to about 11°C; what is important is that in some occasions where the temperature and humidity are low, the evaporator does not have frosting, and it ...

AI Technical Summary

Problems solved by technology

However, during the defrosting process of existing refrigerators, the temperature inside the cabinet will rise sharply to about 11°C; what is important is that in some occasions where the temperature and humidity are low, the evaporator does not have frosting, and it is still Using the time-interval natural defrosting mode will lead to ineffective defrosting; at the same time, in some places with high temperature and humidity, the evaporator frosting is very serious. At this time, still using the time-interval natural defrosting mode may cause the frost to be unable to be completely removed.

Obviously, the time-interval defrosting mode cannot be adapted to various types, so that the actual temperature in the cabinet is already higher than the temperature required by the product, resulting in shortened storage time of the product. Therefore, the defrosting mode of the existing refrigerator cannot meet the actual use needs of users. Problems such as wrong defrosting or untimely defrosting will not only waste energy but also cause economic losses to users

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