Refrigerator and its defrosting method

Abstract

The invention discloses a refrigerator and a defrosting method thereof. A defrosting channel air inlet and a defrosting channel air outlet which are communicated with the outside are arranged at the back of a refrigerator body, the defrosting channel air inlet and the defrosting channel air outlet are arranged on the lower portion and the upper portion of an evaporator respectively, two groups of insulation devices are fixed to the defrosting channel air inlet and the defrosting channel air outlet respectively in a moving mode and are blocked to the defrosting channel air inlet and the defrosting channel air outlet respectively, or two groups of insulation devices are blocked to a duct air outlet and a duct air inlet respectively. By the aid of the refrigerator and the method, the heat exchange between the hot air outside the refrigerator body and the evaporator is conducted to defrost, the energy consumption is low, the refrigerator and the method are safe and reliable and things stored in the refrigerator body cannot be affected.

Description

technical field [0001] The invention relates to a refrigerator, in particular to a refrigerator with a defrosting structure and a defrosting method thereof. Background technique [0002] Air-cooled refrigerators currently on the market use forced cold air circulation for refrigeration. When the refrigerator is cooling, the air inside the refrigerating (freezing) box is forced to pass through the evaporator under the action of the circulating fan. Since the surface temperature of the evaporator is much lower than the dew point of the air in the refrigerating (freezing) box during cooling, This will cause condensation and frost on the surface of the fins of the evaporator, which will affect the cooling effect. When the frost layer on the surface of the evaporator reaches a certain thickness, it is necessary to defrost the evaporator. [0003] The currently known defrosting method for air-cooled refrigerators is mainly the electric heating defrosting method, which utilizes el...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this defrosting method is that the defrosting power consumption is large, and the defrosting efficiency of the electric heater is low, resulting in a long defrosting cycle.

According to relevant studies, only about 1 / 3 of the total heat released by the electric heater is used for defrosting, and most of the other heat is lost in the refrigerator box, causing a sharp rise in the temperature inside the refrigerator box and affecting the items in the refrigerator box. storage effect

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