Defrost system and method thereof

Abstract

The invention discloses a defrosting system and a method thereof. The defrosting system comprises a compressor, a first switching unit, a cooling unit, a second switching unit, a first throttling unit, a heat exchange unit, a second throttling unit, an evaporation unit, a third switching unit and a first defrosting unit. According to the defrosting system, by controlling opening and / or closing of two outlets of each switching unit, refrigeration operation of two different chambers can be achieved; and condensing heat of the heat exchange unit can be used for defrosting the chamber where the heat exchange unit is located, the control logic is simple, and operability is high. In addition, when the evaporation unit does not need to execute refrigeration operation, the first defrosting unit can be used for defrosting without extra refrigeration operation, and practicability and feasibility are also good.

Description

technical field [0001] The invention relates to the technical field of frost defrosting, in particular to a defrosting system and method thereof. Background technique [0002] At present, with the intensification of the greenhouse effect and the society's advocacy of low-carbon life, the energy-saving needs of household appliances, especially refrigerators, are getting more and more attention, and there are more and more energy-saving new technologies. [0003] Generally, a refrigerator includes a freezer and a refrigerator, each having its own refrigeration system and defrosting system, and there is no air circulation between the freezer and the refrigerator. When their respective refrigeration systems issue a defrosting request, they defrost independently. In this way, the condensation heat of each refrigeration system cannot be better utilized, resulting in a waste of energy. [0004] In response to the above problems, some refrigerator defrosting systems that can utili...

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Problems solved by technology

In this way, the condensation heat of each refrigeration system cannot be better utilized, resulting in a waste of energy.

[0004] In response to the above problems, some refrigerator defrosting systems that can use condensation heat to defrost have appeared on the market. However, the existing defrosting systems still have the problems of complex control logic, poor practicability and feasibility

[0005] For example, the Chinese patent application number 201510555985.9 discloses an automatic frosting system and its control method for an air-cooled refrigerator, but its defrosting branch relies more on other cooling branches, that is, when using condensation heat for defrosting In this case, the refrigeration branch is bound to be used for refrigeration operation. When the refrigeration branch does not need refrigeration, the refrigeration operation still needs to be turned on to condense heat for the defrosting operation. The practicability and feasibility are poor, and the energy-saving effect is not ideal.

Moreover, there are many pipelines in each refrigeration branch, and there are many flow directions, and the control logic is complicated.

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