Air-cooled refrigerator

Abstract

The invention provides an air-cooled refrigerator. The air-cooled refrigerator comprises a refrigeration chamber, an evaporator, a heating device, a heat conduction channel and a fan. The refrigeration chamber is provided with an air inlet and an air outlet used for conveying cold air to a storage chamber of the air-cooled refrigerator. The evaporator is arranged in the refrigeration chamber and is configured to provide cold air subjected to heat exchange by the evaporator for the storage chamber. The heating device is arranged in the refrigerating chamber and is configured to defrost the evaporator. The heat conduction channel is provided with a hot air inlet communicating with the refrigeration chamber and a hot air outlet communicating with the outer portion of the air-cooled refrigerator. The fan is configured to achieve the aims that when the air-cooled refrigerator carries out defrosting, after being driven to pass through the evaporator, hot air in the refrigeration chamber enters the heat conduction channel from the hot air inlet so as to be exhausted out of the air-cooled refrigerator. Forced convection is combined with radiation heat exchange defrosting, the defrosting speed and efficiency are improved, the defrosting time is shortened, and therefore the temperature fluctuation amplitude in the defrosting period is reduced; and meanwhile, redundant heat during defrosting can be guided out of the area where the evaporator is located, and therefore temperature fluctuation of the storage chamber in the defrosting period is reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to an air-cooled refrigerator. Background technique [0002] At present, frost-free refrigerators (also known as air-cooled refrigerators) have become the mainstream demand in the market, and their automatic frosting function brings great convenience to the use of refrigerators. At present, the mature technology for automatic defrosting of refrigerators is mainly electric heating defrosting, but because the traditional electric heating defrosting does not export the defrosting heat out of the box during defrosting, the damper opens after defrosting, and the defrosting heat will be released. If it is discharged into the compartment, it will inevitably lead to temperature fluctuations in the compartment, and the temperature fluctuation in the freezer (or refrigerator) may even reach 10°C, which will affect the freshness of the stored food. Therefore, how to reduce the...

AI Technical Summary

Problems solved by technology

The first is to use reverse cycle defrosting, energy storage defrosting and other technical means to replace electric heating defrosting, but this kind of technology has problems such as long defrosting cycle, increased system complexity and high cost, making it difficult to apply

The second is to reduce temperature fluctuations by using shielding technology (such as fan shielding technology), but under this technical means, the temperature fluctuation of the freezer is still 3-5 ℃, which still has a great impact on the preservation effect of frozen foods

[0004] In addition, when using electric heating to defrost, because it only relies on natural convection heat transfer, the defrosting time is very long, which also increases the range of temperature fluctuations and increases the power consumption of the refrigerator at the same time.

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