KR20130129794A - Refrigerator - Google Patents

Abstract

The present invention discloses a refrigerator. The refrigerator includes an evaporator that cools the surrounding air by vaporization of the refrigerant to generate cold air; Blower fan to blow cold air; A cold air duct disposed at a rear side of the freezing compartment and having a cold air discharge port formed to discharge cold air blown by the blowing fan to the freezing compartment; And a shielding film covering an outlet end of the cold air discharge port, wherein the shielding film is opened by cold air introduced into the inlet end of the cold air discharge port in the operation mode of the blower fan to open the outlet end of the cold air discharge port.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator, and more particularly, to a refrigerator for refrigerating and freezing food by using a heat exchange action of a refrigerant by a refrigeration cycle.

In general, the intercooled refrigerator employs a defrost heater and removes frost formed on the surface of the evaporator, unlike the direct cooled refrigerator.

However, in the conventional intercooled refrigerator, the heat generated by the heat generation of the defrost heater is discharged to the freezing chamber through the cold air discharge port, so that the temperature of the freezing chamber as a whole rises, and the temperature difference of the inside of the freezing chamber increases due to the convection of the heat. There was this.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to provide a refrigerator that can block the heat flowing into the freezer.

In order to achieve the above object, a refrigerator according to an embodiment of the present invention, an evaporator for cooling the ambient air by the vaporization of the refrigerant to generate cold air; A blowing fan for blowing the cold air; A cold air duct disposed on a rear surface of a freezing compartment, the cold air duct being formed to discharge the cold air blown by the blowing fan to the freezing compartment; And a shielding film covering an outlet end of the cold air discharge port, wherein the shielding film is opened by the cold air introduced into the inlet end of the cold air discharge port in an operation mode of the blower fan to open the outlet end of the cold air discharge port. do.

According to an embodiment of the present invention, further comprising a defrost heater for supplying heat to the evaporator to melt the frost formed on the evaporator, the defrost heater is operated in the stop mode of the blowing fan, when the defrost heater is operated, The shielding membrane may close the cold air discharge port.

According to an embodiment of the present invention, the shielding membrane is provided in a thin plate, the upper end of the shielding membrane may be coupled above the cold air outlet on the cold air duct.

According to the present invention, it is possible to minimize the temperature rise inside the freezer compartment.

And according to the present invention, it is possible to minimize the vertical deviation of the inside of the freezer compartment.

Moreover, according to this invention, the efficiency of a defrost function can be increased.

The drawings described below are for illustrative purposes only and are not intended to limit the scope of the invention.
1 is a side cross-sectional view of a refrigerator according to an embodiment of the present invention.
FIG. 2 is an enlarged view of portion “A” of FIG. 1.
3 is a view showing the operation of the shielding membrane.

Hereinafter, a refrigerator according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to constituent elements of each drawing, it should be noted that the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

(Example)

1 is a side cross-sectional view of a refrigerator according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion “A” of FIG. 1, and FIG. 3 is a view illustrating an operation of a shielding film.

1 to 3, the refrigerator 10 according to the embodiment of the present invention has a refrigerator main body 100 having a rectangular parallelepiped shape with an open front surface. The internal space of the refrigerator main body 100 may be divided into a freezing compartment 110 and a refrigerating compartment (not shown) by a vertical partition wall (not shown). In the freezing chamber 110, a plurality of shelves 112 for storing food are spaced apart in the vertical direction.

An open front of the refrigerator main body 100 is coupled to the refrigerator door 200 for opening and closing the freezer compartment 110 and a refrigerating compartment (not shown), and the cold air duct 300 at a position spaced inward from the rear side of the refrigerator main body 100. ) Are combined. The cold air duct 300 is provided in a plate shape having a size corresponding to the rear surface of the refrigerator body 100. An evaporator 400, a blowing fan 500, and a defrost heater 600, which will be described later, are disposed between the cold air duct 300 and the rear surface of the refrigerator main body 100.

The evaporator 400 generates cold air by cooling the ambient air by vaporization of the refrigerant. The blowing fan 500 blows the cold air generated by the evaporator 400 toward the freezing chamber 110. The defrost heater 600 supplies heat to the evaporator 400 to dissolve and remove frost formed on the evaporator 400. The defrost heater 600 is operated in the stop mode of the evaporator 400 and the blowing fan 500.

The cold air duct 300 is formed with a plurality of cold air outlets 320. The cold air outlets 320 may be formed to be spaced apart from each other along the longitudinal direction of the cold air duct 300. The cold air blown by the blowing fan 500 flows up and down along the longitudinal direction of the cold air duct 300, and is discharged to the freezing chamber 110 through the cold air discharge ports 320.

However, the heat generated by the defrost heater 600 for defrosting the evaporator 400 may be discharged to the freezing chamber 110 through the cold air discharge ports 320. When the heat is discharged to the freezer compartment 110, the temperature of the freezer compartment 110 is raised as a whole, as well as the problem that the temperature difference of the up and down inside the freezer compartment 110 may increase due to convection of the heat.

The present invention, in order to solve the above problems, provides a shielding film to block the discharge of heat through the cold air discharge port 320, which will be described in detail as follows.

As shown in FIG. 2, the shielding film 340 is disposed to cover the outlet end of the cold air discharge port 320. The shielding film 340 may be provided as a thin plate of a thin flexible material. The upper end of the shielding film 340 is coupled to the upper portion of the cold air discharge port 320 on the cold air duct 300, and the lower end and both sides of the shielding film 340 form a free end without being restrained.

For example, in the operation mode of the refrigeration cycle including the blowing fan 500 (FIG. 3), the cold air blown by the blowing fan 500 flows into the inflow end of the cold air discharge port 320 and the cold air discharge port 320. Is discharged to the outflow end. At this time, the shielding film 340 is floated by the pressure of the cold air discharged to the outflow end, and the cold air discharge port 320 is opened. In this state, cold air is continuously discharged to the freezing chamber to cool the freezing chamber.

In contrast, in the stop mode of the refrigerating cycle including the blowing fan 500 (FIG. 2), since the cool air does not flow into the cold air discharge port 320, the pressure of the cold air does not act on the shielding film 340. Therefore, the shielding film 340 moves downward by its own weight, thereby closing the outflow end of the cold air discharge port 320. In this state, when the defrost heater 600 releases heat for defrosting the evaporator 400, most of the heat generated by the defrost heater 600 dissolves and removes the frost on the evaporator 400. In addition, a portion of the heat may flow into the cold air outlets 320, but since the outlet end of the cold air outlets 320 is closed by the shielding film 340, the shielding film 340 is freezer 110. To block heat ingress

Therefore, the refrigerator according to the embodiment of the present invention, the problems caused by the inflow of hot air into the freezer compartment 110, that is, the temperature of the freezer compartment is increased by the heat, or the problem that the upper and lower temperature deviation inside the freezer compartment by the heat increases Can be solved.

In addition, the refrigerator according to the embodiment of the present invention, since the heat loss to the cold air discharge port is prevented, it is possible to increase the efficiency of the defrost function of the defrost heater.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: refrigerator body
200: refrigerator door
300: cold air duct
320: cold air outlet
340: shielding film
400: evaporator
500: blower fan
600: defrost heater

Claims (3)

An evaporator that cools the surrounding air by vaporization of the refrigerant to generate cold air;
A blowing fan for blowing the cold air;
A cold air duct disposed on a rear surface of a freezing compartment, the cold air duct being formed to discharge the cold air blown by the blowing fan to the freezing compartment; And
A shielding film covering an outlet end of the cold air discharge port,
And the shielding membrane is opened by the cold air introduced into the inlet end of the cold air outlet in the operation mode of the blower fan to open the outlet end of the cold air outlet. The method of claim 1,
It further comprises a defrost heater for supplying heat to the evaporator to melt the frost is implanted in the evaporator,
The defrost heater is operated in the stop mode of the blowing fan,
And the shielding membrane closes the cold air discharge port when the defrost heater is operated. 3. The method according to claim 1 or 2,
The shielding membrane is provided in a thin plate,
And an upper end of the shielding membrane is coupled above the cold air outlet on the cold air duct.

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