KR20010027238A - Cold air supply device for freezing compartment in refrigerator - Google Patents

Abstract

PURPOSE: A cooling air supply system for freezing compartment is provided to protect the surface of the grille fan from freezing by allowing a high velocity cooling air to be discharged at the surface of the freezing compartment grille fan. CONSTITUTION: A system comprises a grille fan(100) having a plurality of cooling air discharge ports(110,120,116,126) and which is mounted at the rear surface of a freezing compartment; a cooling air supply unit for supplying cooling air into a freezing compartment through cooling air discharge ports of the grille fan; and cooling air guides(122a,116a) arranged at the front surface of the cooling air discharge port and which guide the supplied cooling air to the surface of the grille fan. Thus, high temperature high humidity air is prevented from staying at the surface of the freezing compartment grille fan, to thereby prevent freezing of the grille fan surface.

Description

Cold air supply device for freezing compartment in refrigerator}

The present invention relates to a freezer compartment cold air supply device, and more particularly, to a grill pan of a refrigerator capable of preventing freezing from occurring on the grill pan surface forming the rear wall of the freezer compartment.

Figure 1a is a longitudinal sectional view showing a structure of a conventional refrigerator. Hereinafter, with reference to this, the cold air circulation of the refrigerator will be described.

As shown, the inside of the refrigerator is divided into a freezer compartment 10 and a refrigerating compartment 30 by a barrier 20 filled with insulation. The heat exchange chamber 11 provided at the rear of the freezing chamber 10 is provided with an evaporator 12 through which a low temperature low pressure refrigerant passes. A part of the cold air heat exchanged by the evaporator 12 is supplied to the freezing chamber 10 by the blower fan 14, and the other part is supplied to the refrigerating chamber 30 via the cold air supply passage FD.

The cold air supplied to the freezer compartment 10 is supplied into the freezer compartment 10 through a plurality of cold air outlets 40a, 40b, and 40c formed in the grill pan 40. The cold air supplied to the refrigerating chamber 30 is the refrigerating chamber duct 34 of the refrigerating chamber 30 provided in the longitudinal direction at the rear of the refrigerating chamber 30 through the cold air discharge passage 26 formed in the barrier 20. Comes down. The cold air thus supplied is discharged into the refrigerating chamber 30 through a plurality of cold air discharge holes 34a formed at the refrigerating chamber 30 side from the refrigerating chamber duct 34.

The cold air supplied to the freezing compartment 10 or the refrigerating compartment 30 through such a process becomes relatively high temperature through heat exchange with the food being stored in the freezing compartment 10 or the refrigerating compartment 30. The air moves back to the heat exchange chamber 11 in which the evaporator 12 is installed again through the freezer compartment return passage 24 and the refrigerating compartment return passage 22 formed in the barrier 20.

On the other hand, the gas refrigerant heat exchanged with the ambient air flows into the compressor 51 installed in the machine room 50 at the lower rear side of the refrigerator. The refrigerant flowing into the compressor 51 is compressed and sent to a condenser (not shown) to liquefy. The low temperature and high pressure liquid refrigerant drops in a capillary tube (not shown) and is supplied again to the evaporator 12 of the freezer compartment 10. do. After that, the cycle is repeated.

1B is a front view of the refrigerator door in a state of being opened; As shown, the freezer compartment 10 is partitioned into the upper compartment 10a and the lower compartment 10b by the shelf 10c, and the grill pan 40 is provided at the front of the blower fan 14. In addition, a first cold air discharge hole 40a and a second cold air discharge hole 40b are formed in the grill pan 40 of the upper compartment 10a of the freezer compartment 10 to discharge cold air into the freezer compartment 10. . In addition, a third cold air discharge hole 40c is formed in the grill pan 40 of the lower compartment 10b of the freezer compartment 10.

2 shows a detailed view of the grill pan 40. As shown, the first cold air discharge hole (40a) and the second cold air discharge hole (40b) is formed in the upper left and right sides of the grill pan 40 to discharge the cold air to the front of the freezer compartment. The third cold air discharging hole 40c is formed in the center of the grill pan 40 to discharge cold air toward the center of the freezer compartment.

However, the conventional freezer compartment cold air supply structure configured as described above has the following problems.

1A and 1B, referring to the characteristics of the existing freezer cold air flow, the cold air of the cold air supply passage FD is connected to the freezer compartment 10 through the cold air outlets 40a, 40b, and 40c formed in the grill pan 40. ) Is discharged to the inside, and cold air flows forward in the vicinity of the cold air discharge ports 40a, 40b, and 40c. However, since the left and right sides and the lower side around the cold air discharge ports 40a, 40b, and 40c are not directly affected by the discharged cold air, the portion does not flow into the freezer compartment return path 24 of the barrier 20, Cold air circulating in the freezer is stagnant.

Such a flow pattern causes freezing on the surface of the grill pan 40 when the user frequently opens and closes the door in a high temperature and high humidity environment in the summer and a lot of moisture penetrates into the freezing compartment 10. That is, a part of the high temperature and high humidity air introduced into the freezing chamber 10 remains in the freezing chamber 10, and a part of the air flows in the vicinity of the evaporator 12 of the heat exchange chamber 11 through the freezing chamber return passage 24. If the introduced air contains more than a certain amount of water, during the heat exchange process on the surface of the evaporator 12, the water is completely condensed on the surface of the evaporator 12 and cannot be implanted. In this case, the cold air containing moisture is discharged into the freezing chamber 10 space. While cold air discharged in a normal state is a dry air of a temperature of -20 to -30 ° C and a relative humidity of 20 to 30%, in the summer of high temperature and humidity as described above, the cold air is in a humid air state of 40 to 60% relative humidity. Is discharged. Therefore, the cold air discharged in the wet air state is circulated to the grill pan 40 surface together with the wet air remaining in the freezing chamber 10 space.

However, the surface of the grill pan 40 is 2 to 3 ° C lower than the freezer compartment 10 left and right wall surfaces, the door basket part, and the freezer compartment 10 ceiling, so that the average temperature is -16 to -21 ° C. Potential is large. Accordingly, the wet air circulating on the grill pan 40 surface is condensed on the left and right and lower surfaces of the grill pan 40, in particular, the cold air outlets 40a, 40b, and 40c which are not directly affected by the discharged cold air. It is frozen and grows into frost.

In this case, the freezing not only becomes a resistance to inhibit the flow of cold air, but also serves as a heat insulator, thereby lowering heat transfer inside the freezing compartment and giving the user a feeling of failure, thereby causing reliability of the product.

However, in the above-mentioned freezing phenomenon, the surface of the grill pan 40 of the upper compartment 10a of the freezer compartment 10 is more severe than the surface of the grill pan 40 of the lower compartment 10b. This is because the wet air penetrated into the freezer compartment 10 from the outside of the refrigerator first passes through the upper compartment 10a of the freezer compartment 10 and then circulates to the lower compartment 10b.

The present invention has been made in order to achieve the above object, an object of the present invention is to provide a freezer compartment cold air supply device that can allow the cool air in the freezer compartment to smoothly flow to prevent freezing of the grill pan surface.

Figure 1a is a longitudinal sectional view showing the structure of a conventional refrigerator.

1B is a front view of a conventional refrigerator door open state;

Figure 2 is a front view showing a conventional grill pan structure.

Figure 3 is a front view showing a grill pan structure according to the present invention.

4A is a cross-sectional view taken along the line AA ′ of FIG. 3.

4B is a cross-sectional view taken along the line BB ′ of FIG. 3.

Explanation of symbols on the main parts of the drawings

100; Grill pans 110, 120, 116, 126, 130; Cold air outlet

112,122; Side cold air | gas discharge part 116a, 122a; Cold Guide

116b, 122b; Cold air discharge 116c and 122c; live

114,124; Central cold air discharge part H; Height of cold air discharge

L: length of the rib W; Width of cold guide

FD; Cold Supply Euro

In order to achieve the above object, the freezer compartment cold air supply apparatus according to the present invention, the grill fan having a plurality of cold air discharge holes, which is installed on the rear of the freezer compartment; Cold air supply means for supplying cold air to the cold air discharge holes of the grill pan; It is formed on the front surface of the cold air discharge hole, and comprises a cold guide for guiding the supplied cold air to the surface of the grill pan; The cold air guide is a technical point that can be selectively molded in at least a portion of the plurality of cold air discharge holes.

And the cold air guide is preferably molded in a streamlined toward the surface of the grill pan.

The cold air discharging hole of the grill pan includes first and second cold air discharging holes formed at the left and right sides of the upper end of the grill pan, and third and fourth cold air discharging balls formed under the first and second cold air discharging holes; It comprises a fifth cold air discharge hole is formed in the center of the lower end of the grill pan.

Cold guides formed in the first and second cold air discharging holes are partially downwardly formed at both end portions thereof to guide the cold air supplied through the first and second cold air discharging holes downward, and the third and fourth portions. The cold air guides formed in the cold air discharge holes are formed to guide the cold air to the sides facing each other.

A plate-shaped rib for selectively guiding the supplied cold air to the cold air discharge hole is selectively formed in the grill pan at the rear side of the cold air discharge hole.

According to the configuration of the present invention, by discharging the cold air to the surface of the freezer compartment grill pan there is an advantage that can prevent the formation of freezing on the grill pan surface by the stagnant air of high temperature and high humidity on the surface of the freezer compartment grill pan. As described above, when freezing is prevented from occurring on the grill pan surface, the problem of cold air flow inhibition due to freezing in the freezing compartment is solved.

In addition, the cold air of the cold air supply flow path may be guided to the cold air discharge port side to increase the amount of cold air discharged to the freezing chamber and the discharge speed of the cold air to generate high speed cold air flow on the grill pan surface. Therefore, there is an advantage in that the wet air can be prevented from stagnation on the grill pan surface.

Next, with reference to the embodiment shown in the accompanying drawings will be described in detail a preferred embodiment of the freezer compartment cold air supply apparatus according to the present invention.

Figure 3 is a front view showing a grill pan structure according to the present invention, 4a is a cross-sectional view taken along the line AA 'of Figure 3, Figure 4b is a cross-sectional view taken along the line B-B' of FIG.

As illustrated in FIG. 3, the grill pan 100 according to the present invention includes a first cold air outlet 110 and a second cold air outlet 120 on the left and right sides of the upper side, and the first cold air outlet. A third cold air outlet 116 and a fourth cold air outlet 126 are formed below the 110 and the second cold air outlet 120, respectively. A fifth cold air outlet 130 is formed below the third cold air outlet 116 and the fourth cold air outlet 126.

The first cold air outlet 110 and the second cold air outlet 120 are composed of a central cold air outlet 114 and 124 and side cold air outlets 112 and 122, respectively, and are symmetric. The central side cold air discharging parts 114 and 124 of the grill pan 100 discharge cold air to the front of the freezing chamber, and the left and right side cold air discharging parts 112 and 122 of the grill pan 100 have cold air on the upper surface of the grill pan 100. To discharge. In addition, the third cold air discharge port 116 and the fourth cold air discharge port 126 serve to discharge cold air to the middle surface of the grill pan 100. In addition, the fifth cold air discharge port 130 serves to discharge cold air to the middle front of the grill pan 100.

4A is a longitudinal cross-sectional view of the side cold air discharge portion 122 of the second cold air discharge port 120. As shown in the drawing, the upper side of the side cool air discharge part 122 is provided with a first cool air guide 122a having a "-" shape as a discharge guide. The first cold air guide 122a changes the direction of the cold air discharged through the first cold air discharge hole 122b of the side cold air discharge unit 122 downward so that the cold air is discharged toward the surface of the grill pan 100. It plays a role. A plate-shaped first rib 122c is formed at an inner side of the side cold air discharge part 122 and an upper portion of the cold air supply passage FD. The first rib 122c prevents the diffusion of cold air into the upper portion of the cold air supply passage FD and guides cold air toward the first cold air discharge hole 122b. Therefore, compared with the case where the first rib 122c is not provided, when the first rib 122c is installed, the air volume of the cold air discharged to the first cold air discharge hole 122b is increased. Here, since the first cold air outlet 110 and the second cold air outlet 120 are formed symmetrically with each other, the configuration of the side cold air outlet 122 of the second cold air outlet 120 described above is substantially the first. It will be appreciated that the configuration is the same as that of the side cold air discharge part 112 of the cold air discharge port 110.

4B is a cross-sectional view of the third cold air outlet 116. As shown, the second cold air guide 116a having an "a" shape is also provided above the second cold air discharge hole 116b of the third cold air discharge port 116. The second cold air guide 116a also serves to change the direction of the cold air discharged through the second cold air discharge hole 116b so that the discharged cold air flows in the center of the surface of the grill pan 100. The second cold guide 116a and the cold guide described later are preferably molded to have a streamlined shape to prevent flow noise of cold air.

A second rib 116c is provided inside the cold air supply flow path FD inside the second cold air discharge hole 116b (lower in FIG. 4B). The second rib 116c guides the cold air supplied through the cold air supply passage FD to the second cold air discharge hole 116b as in the first rib 122c (see FIG. 4A), and thus the second cold air. It serves to increase the amount of cold air discharged through the discharge hole (116b). In the above description, the second cold air outlet 120 and the third cold air outlet 116 have been described as an example, but the structures of the first cold air outlet 110 and the fourth cold air outlet 126 are basically the same.

Hereinafter, an operation relationship of the freezer compartment cold air supply device configured as described above will be described with reference to FIGS. 3, 4A, and 4B. Incidentally, the same parts as in the conventional refrigerator structure will be described using the same reference numerals.

Some of the cold air produced in the evaporator 12 (see FIG. 1A) is supplied to the refrigerating chamber 30 (see FIG. 1A) through the cold air supply passage FD (see FIG. 1A), while the other part of the freezer compartment 10 ( 1a). That is, a part of the cold air generated by the evaporator 12 is sent to the grill pan 100 side of the freezing chamber 10 which forms one side of the cold air supply passage FD (see FIG. 1A).

As shown in FIG. 4A, the cold air sent to the grill pan 100 side of the second cold air discharge port 120 (refer to FIG. 3) is provided by the first rib 122c installed in the cold air supply flow path FD. The central cold air discharging unit 124 (see FIG. 3) and the side cold air discharging unit 122 are led to the first cold air discharging hole 122b. Therefore, the amount of cold air discharged to the first cold air discharging hole 122b of the central cold air discharging unit 124 and the side cold air discharging unit 122 by the first rib 122c is increased.

The cold air discharged forward through the first cold air discharge hole 122b of the side cold air discharge part 122 is changed in the discharge direction by the first cold air guide 122a formed on the first cold air discharge hole 122b. And discharged downward. In this case, the discharged cold air flows from the upper surface of the grill pan 100 to the lower side. The cold air discharged through the central cold air discharge unit 124 flows in front of the grill pan 100, that is, toward the door side.

On the other hand, the high-speed cold air toward the third cold air discharge port 116 (the same as the fourth cold air discharge port 126 shown in Figure 3) formed in the middle portion of the grill pan 100 shown in Figure 4b, the grill pan It is discharged to the surface center portion of the (100). The second rib 116c is formed in the inner cold air supply passage FD of the third cold air discharge port 116, and the second cold air guide 116a is installed on the third cold air discharge port 116. Because there is. That is, the cold air of the cold air supply passage FD is guided to the second cold air discharge hole 116b by the second rib 116c, and is discharged through the second cold air discharge hole 116b while being discharged through the second cold air. This is because the guide 116a is guided to the surface of the grill pan 100.

The length L of the first rib 122c and the second rib 116c of FIGS. 4A and 4B is 30 mm, and the height of the first cold air discharge hole 122b and the second cold air discharge hole 116b ( When H) is 15 mm and the width W of the first cold guide 122a and the second cold guide 116a is 8 mm, the first cold air discharge hole 122b and the second cold air discharge hole 116b. It can be seen that the discharge speed of the cold air discharged through) increases. By considering the structure and size of the freezer compartment, the length of the ribs, the height of the cold air discharge hole, and the width of the cold guide can be varied to control the discharge speed of the cold air.

As described above, since high speed (1-3 m / s) cold air flows on the upper surface of the grill pan 100 according to the present invention, freezing of the surface of the grill pan 100 as in the prior art can be prevented. . That is, even if the door of the freezing chamber is opened in an environment of high temperature and high humidity, air of high temperature and high humidity flows into the freezing chamber 10, and even though the introduced air flows into the upper compartment 10a of the freezing chamber 10, the grill pan 100 is upper part. And the cold air of high temperature, high humidity does not stagnate on the central surface. Therefore, condensation does not occur on the surface of the grill pan 100.

As described above, when the freezing of the surface of the grill pan is prevented, the flow resistance and the heat transfer decrease due to the freezing are suppressed.

The present invention is a technical idea to discharge the cold air to the surface of the freezer compartment grill pan, to prevent condensation of the grill pan surface by preventing the high-temperature, high-humidity air to stagnate on the grill pan surface, and is not limited to the above embodiment Examples are possible.

As described above, the freezer compartment cold air supply apparatus according to the present invention has a discharge guide that guides the discharged cold air to the surface in front of the cold air discharge port formed in the freezer compartment grill pan so that the high speed cold air is discharged to the grill pan surface. . Therefore, it is possible to prevent the high temperature and high humidity air from stagnation on the surface of the freezer compartment grill pan to suppress freezing, and as a result, it is possible to prevent the flow resistance of the cold air due to the freezing and the reduction of heat transfer.

Claims (5)

A grill fan having a plurality of cold air discharge holes and installed at a rear side of the freezing compartment; Cold air supply means for supplying cold air to the cold air discharge holes of the grill pan; It is formed on the front surface of the cold air discharge hole, and comprises a cold guide for guiding the supplied cold air to the surface of the grill pan; The cold air guide is a freezer compartment cold air supply apparatus characterized in that it can be selectively molded in at least a portion of the plurality of cold air discharge holes. The freezer compartment cold air supply apparatus according to claim 1, wherein the cold air guide is bent in a streamlined direction toward the surface of the grill pan. According to claim 1 or 2, wherein the cold air discharge hole of the grill pan, First and second cold air discharging holes formed at the left and right sides of the upper end of the grill pan, Third and fourth cold air discharging holes formed under the first and second cold air discharging holes; Freezer compartment cold air supply apparatus comprising a fifth cold air discharge hole is formed in the center of the lower end of the grill pan. The cold air guide formed in the first and second cold air discharging holes is partially downwardly formed at both end portions thereof to guide the cold air supplied through the first and second cold air discharging holes downward. And the cold air guides formed in the third and fourth cold air discharge holes are formed to guide the cold air to side surfaces facing each other. 4. The freezer compartment cold air supply apparatus according to claim 3, wherein a plate-shaped rib for selectively guiding the supplied cold air to the cold air discharge hole is selectively formed in the grill pan at the rear of the cold air discharge hole.