Refrigerator

Abstract

The invention provides a refrigerator. The refrigerator comprises a refrigerating chamber, a freezing chamber and a temperature-variable chamber, wherein the refrigerator also comprises a refrigerating system; the refrigerating chamber is provided with freezing air inlets and a freezing air returning opening; the temperature-variable chamber is provided with temperature-variable air inlets and a temperature-variable air returning opening; the refrigerating chamber is provided with a refrigerating air inlet and a refrigerating air returning opening; the refrigerating system comprises an evaporator chamber, an air supply channel, an air returning channel and a pressure balancing part; an evaporator and a fan are arranged in the evaporator chamber; the evaporator chamber comprises an air inlet end and an air inlet end; the fan is arranged close to the air outlet end; the air supply channel is communicated with the air outlet end and comprises a freezing air supply channel, a refrigeratingair supply channel and a temperature-variable air supply channel; the air returning channel comprises a freezing air returning channel and a temperature-variable air returning channel; the pressure balancing part is arranged close to the temperature-variable air returning opening. According to the refrigerator, after the refrigeration of the temperature-variable chamber is ended, the temperature-variable air inlets are closed and the temperature-variable air returning opening is opened; the pressure balancing part operates so as to enable the air pressure in the temperature-variable chamber to be balanced; the problem that the external hot air enters through the door gaps caused by negative pressure in the temperature-variable chamber is avoided.

Description

technical field [0001] The invention relates to the field of refrigerators, in particular to an air-cooled refrigerator capable of reducing frost formation on the top of a variable temperature chamber. Background technique [0002] At present, most air-cooled refrigerators on the market adopt a single-system refrigeration method, that is, only one evaporator and fan are used to provide cold air for the refrigerator, freezer and variable room, and the refrigerator, freezer and variable room are respectively equipped with air inlets. and return vents. This kind of refrigeration control system is relatively simple. However, since there is only one evaporator, when the cooling temperature required by the freezer is lower than that of the variable room, the variable temperature air inlet will be closed after the variable temperature room finishes cooling, but the variable temperature return air port will continue to return air. At this time, the temperature-changing room will fo...

AI Technical Summary

Problems solved by technology

At this time, the temperature-changing room will form a negative pressure, and the outside air with a higher temperature will easily enter the room through the door gap of the temperature-changing room and flow upwards, causing frost to form on the top of the room.

[0003] The existing technology to prevent frost on the top of the variable temperature chamber mainly includes adding an evaporator, that is, changing to a dual-system or three-system cooling method, but this technology costs a lot; defrosting, but this technology will significantly increase energy consumption, and at the same time, the work of the heating wire will affect the freshness of the food around it

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