Multiple-refrigerating system used for refrigerator

Abstract

The invention relates to a multiple-refrigerating system used for a refrigerator and belongs to the technical field of refrigerators. The multiple-refrigerating system used for the refrigerator comprises a compressor, a condenser, a first freezing evaporator, a refrigeration evaporator, a variable temperature evaporator and a power-driven changeover valve. An outlet of the condenser is connected with an inlet of the power-driven changeover valve. The multiple-refrigerating system used for the refrigerator further comprises a second freezing evaporator. An outlet of the power-driven changeover valve is connected with an outlet of the refrigeration evaporator through a refrigeration capillary tube, connected with an outlet of the variable temperature evaporator through a variable temperature capillary tube and connected with an outlet of the second freezing evaporator through a freezing capillary tube. An outlet of the refrigeration evaporator and an outlet of the variable temperature evaporator are connected with an inlet of the first freezing evaporator. An outlet of the first freezing evaporator and an outlet of the second freezing evaporator are connected with an inlet of the compressor. The first freezing evaporator and the second freezing evaporator are both arranged between a thermal insulation layer and a freezing chamber liner of an existing refrigerator. The multiple-refrigerating system used for the refrigerator is low in startup rate and short in working time.

Description

technical field [0001] The invention relates to a refrigeration system for a refrigerator, which belongs to the technical field of refrigerators. Background technique [0002] At present, direct cooling refrigerators on the market usually use two types of refrigeration systems: 1) the refrigeration evaporator and the variable temperature evaporator are connected in parallel, and at the same time, the outlets of the refrigeration evaporator and the variable temperature evaporator are connected to the inlet of the freezing evaporator; 2) the refrigeration evaporator The evaporator, variable temperature evaporator and refrigeration evaporator are connected in parallel. [0003] The applicant found that with the first type of refrigeration system, it is very difficult to achieve the set refrigeration temperature due to the low temperature requirement of the freezer, which needs to reach -18°C. With the second type of refrigeration system, it is not only difficult to achieve the...

AI Technical Summary

Problems solved by technology

During the working process of the refrigerator, the surface of the evaporating coil directly exchanges heat with the air in the freezer room. Although it can quickly reduce the temperature in the freezer room, due to the large temperature difference between the rooms, it is very easy to evaporate on the surface of the inner tank of the freezer room. The surface of the coil is frosted, and the frosted parts are unevenly distributed, so it is not easy to defrost

[0005] At the same time, as far as the applicant knows, the existing freezer refrigeration generally uses a wire-tube evaporator with a built-in evaporator, but the built-in evaporator not only occupies a certain space volume, but is still prone to frost in the compartment and is not easy to defrost.

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