Hot gas bypass defrosting system of refrigerator

Abstract

An exhaust port of a compressor is connected with a condenser through a first pipeline, an air suction port of the compressor is connected with a backflow pipeline, an outlet of a throttling component is connected with a second pipeline, a coil pipe of an evaporator is divided into two independent sections, the section close to a fan of the evaporator is a first coil pipe, and the section close to a fan of the evaporator is a second coil pipe. The other section is a second coil pipe, air inlet ports of the first coil pipe and the second coil pipe are respectively connected with a first shunting branch and a second shunting branch, and the other ends of the two shunting branches are converged at the tail end of the second pipeline; a first node, a second node and a main air valve are sequentially arranged on the first pipeline at intervals, and the first node is connected to the first shunt branch through a first bypass branch pipe; the second node is connected to the second pipeline through a second bypass branch pipe, and the two bypass branch pipes are respectively provided with an air valve. The utility model has the advantages that the coil pipe of the evaporator is divided into two sections, so that the sectional defrosting control on the coil pipe of the evaporator is realized, and the energy consumption of a refrigerator and the refrigerating cycle heat load are reduced.

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