A refrigerator and its frost-free refrigeration system

Abstract

The invention provides a refrigerator and a frostless refrigerating system thereof. The frostless refrigerating system includes an air duct panel which is arranged in the refrigerator and positioned in the front of a back side liner; an air duct is formed between the air duct panel and the back side liner; an evaporator is arranged in the air duct and can divide the air duct into a front air duct and a back air duct; the back air duct is provided with an air returning opening which communicates with a cavity of the liner, and the front air duct is provided with an air supplying opening which can supply air to the cavity of the liner; a fan can drive air flow to flow to the front air duct from the back air duct; a motor can drive the fan to rotate; and the motor is connected to the fan. According to the refrigerator and the frostless refrigerating system thereof, primary heat exchange is performed when air flow passes through the back part of the evaporator during air returning, secondary heat exchange is performed when the air flow passes through a back air duct of the fan and then passes through the front part of the evaporator during air supplying, and in this way, heat exchange is performed between the front part and the back part of the evaporator and the air flow, the heat exchange distance is prolonged, the heat exchange efficiency is improved, the frosting amount is reduced, power consumption of defrosting is decreased, extra power consumption of defrosting is not required, and energy consumption of the refrigerator is decreased.

Description

technical field [0001] The invention relates to the technical field of refrigerators, in particular to a refrigerator and its frost-free refrigeration system. Background technique [0002] In addition to the pursuit of beautiful appearance, clean and convenient design of refrigerators, high energy efficiency has become the mainstream of today's home appliances. The air-cooled refrigerator is clean and frost-free, and is welcomed by the market. The refrigerating room, variable temperature room, cooling room and other storage rooms except the freezing room of the air-cooled refrigerator are sent to the whole room by the cold air blown from the evaporator by the air duct, so as to keep the temperature of the storage room at a low level. temperature. [0003] At present, the refrigeration system of the above-mentioned storage room includes an air duct arranged at the rear of the refrigerator liner and a finned evaporator close to the rear of the air duct or the rear of the cab...

AI Technical Summary

Problems solved by technology

[0004] However, since the air flow in the air duct only exchanges heat with the side of the evaporator close to the air duct during the flow process, the heat exchange of the evaporator is insufficient, the local temperature is lowered, and frost is easy to form; and the fins of the finned evaporator It is also easier to frost between the finned evaporators, resulting in a large amount of frost on the surface of the finned evaporator. After a period of operation, the frost layer will seriously affect the cooling effect, so it is necessary to install a high-power (100W-300W) electric heater at the bottom to carry out Timed defrosting, the power consumption of defrosting is relatively large, which increases the energy consumption of the entire refrigerator

[0005] In addition, in the above-mentioned refrigeration system, the volume occupied by the air duct and the evaporator is relatively large, resulting in a corresponding reduction in the placement space of the placement chamber

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