refrigerator

Abstract

The invention discloses a refrigerator, comprising: a first inner tank, a second inner tank, a circulating air duct, an evaporator room and a telescopic air bag, the first inner tank and the second inner tank are arranged to surround the outer side of the first inner tank Circulating air duct, the evaporator chamber and the cavity are connected through a circulating air duct, an airflow channel is formed between the evaporator chamber, the circulating air duct and the cavity, and a telescopic chamber is formed inside the telescopic airbag, and the telescopic chamber and the airflow The passages are in air communication, and the telescopic air bag is arranged in the freezing chamber surrounded by the first inner tank. The exchange of cold energy between the cavity and the refrigeration compartment of the refrigerator avoids the problems of food being blown dry, odors, and evaporator frosting. The telescopic chamber of the telescopic airbag is connected to the airflow channel. Stretching or shrinking, the pressure change in the airflow channel is avoided through the volume change, thereby avoiding the problem of structural deformation of the first inner tank or the second inner tank.

Description

technical field [0001] The invention relates to the field of refrigerators, in particular to an air-cooled refrigerator with a structure for indirectly cooling a refrigeration compartment. Background technique [0002] Existing air-cooled refrigerators often have problems such as easy drying of food, frosting on the evaporator, and odor accumulation. Or the freezer can only be effectively solved by heat exchange. [0003] However, after the cooling capacity is limited to circulate in the inner space, due to the problem of thermal expansion and cold contraction, according to the ideal gas state equation: P'V' / T'=PV / T, the same closed space, as the temperature decreases, its pressure also decreases. It will decrease, and the difference between the internal and external air pressure will cause the deformation of the cabinet. If you need to eliminate the problem of deformation caused by the pressure difference, assume that the internal and external air pressure is the same. Tak...

AI Technical Summary

Problems solved by technology

[0002] Existing air-cooled refrigerators often have problems such as easy drying of food, frosting on the evaporator, and odor accumulation. Or the freezer can effectively solve the problem only by heat exchange

[0003] However, after the cooling capacity is limited to circulate in the inner space, due to the problem of thermal expansion and cold contraction, according to the ideal gas state equation: P'V' / T'=PV / T, the same closed space, as the temperature decreases, its pressure also decreases. It will decrease, and the difference between the internal and external air pressure will cause the deformation of the cabinet. If you need to eliminate the problem of deformation caused by the pressure difference, assume that the internal and external air pressure is the same. Take the actual use conditions in summer as an example. The air temperature of the cold wind is -33°C. From the formula V / (273+37)=V′ / (273-33), it can be concluded that: V′=0.77V, that is, the volume of the internal space needs to be changed to 77% of the original volume to Avoiding the problem of deformation caused by the difference between internal and external pressure, or using materials with higher rigidity, will lead to higher costs, and in order to prevent the possibility of deformation caused by internal and external pressure due to insufficient rigidity, the rigidity needs to be as high as possible, resulting in further costs. Improvement; if the internal space is connected with the external space, the water vapor in the external atmosphere will be sucked into the interior, which will cause the problem of frosting in the evaporator and air duct, which violates the original intention of the design

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