KR19980083063A - Refrigerator with freezer cold air control structure using air curtain - Google Patents

Abstract

The present invention prevents hot air from invading the freezer compartment when opening the freezer door of the refrigerator, thereby preserving cold air in the freezer compartment, thereby reducing power loss for lowering the temperature in the freezer compartment and allowing moisture contained in the hot air to form around the cooler. This is to prevent the cooling efficiency from lowering.

The present invention is provided in the cold air supply duct 40 and the cold air supply duct 40 formed on the upper surface of the freezer compartment 20 to communicate with the front of the freezer compartment 20 from the cooler 22 of the freezer compartment 20 It is provided with the cross flow fan 42 which sprays below the front surface, and forms an air curtain.

The present invention prevents the hot air from entering the inside of the freezer compartment 20 rapidly by the air curtain to preserve the cold air in the freezer compartment 20 to prevent the contents of the inside of the freezer compartment 20 from being deteriorated due to temperature rise, By shortening the refrigerant compression time of the compressor (70) to reduce the noise generation time and power consumption, it is effective to prevent the moisture contained in the hot air in the cooler 22 to increase the cooling efficiency.

Description

Refrigerator with freezer cold air control structure using air curtain

The present invention relates to a refrigerator having a freezer compartment air-conditioning structure using an air curtain, and in particular, a cold air supply duct communicating with the front side of the freezer compartment in the freezer compartment of the refrigerator and installing a cross flow fan for generating laminar flow in the cold air supply duct. By forming an air curtain on the front of the freezer compartment when the freezer door is opened, it relates to a refrigerator having a freezer cold air control structure using an air curtain to prevent the loss of cold air by invading hot air into the freezer compartment.

In general, as shown in FIG. 1, the refrigerator main body 110 is thermally insulated on all sides except the front surface, and is divided into a freezer compartment 114 and a refrigerating compartment 116 by a partition wall 112. Doors 120 are hingedly installed on the front surfaces of the freezer compartment 114 and the refrigerating compartment 116, respectively.

On the rear side of the inside of the freezer compartment 114 of the refrigerator, a cooler 122 that absorbs the surrounding heat by the refrigerant compression of the compressor 140 and obtains a cooling effect is installed, and the cold air generated by the cooler 122 is installed on the upper portion thereof. Cold air into the refrigerating compartment 116 through the freezer compartment pure fan 124 and the multi-duct 126 installed on the rear side of the refrigerating compartment 116 through the supply port 118 formed on the inner wall of the freezing compartment 114. The refrigerator compartment circulation fan 128 to supply is provided. In addition, the partition walls 112 between the freezer compartment 114 and the refrigerating compartment 116 are provided with circulation passages 134 and 136 having cold air inlets 130 and 132 for circulating cold air of the freezer compartment 114 and the refrigerating compartment 116, respectively. have.

In the conventional refrigerator having the cooling structure as described above, as the power is applied, the refrigerant compressed by the compressor 140 installed on the bottom of the main body 110 absorbs latent heat for evaporating from the cooler 122 and thus passes through the air. Lower the temperature. As the freezer compartment and the refrigerating compartment circulation fans 124 and 128 are driven in this manner, the air cooled by the cooler 122 is supplied into the freezer compartment 114 and the refrigerating compartment 116, respectively. At this time, the cold air is discharged toward the front from the rear side of the freezer compartment 114 and the refrigerating compartment 116 to freeze the contents in the freezer compartment 114 or to keep the contents stored in the refrigerating compartment 116 fresh.

The cold air inside the freezing compartment 114 and the refrigerating compartment 116 passes through the cold air inlet 120 and the circulation passage 136 of the partition wall 112 to the cooler 122 side and continuously circulates. Therefore, the freezer compartment 114 is kept constant at -18 ℃ so that the contents can be stored in a frozen state for a long time, the refrigerator compartment 116 is maintained at 0 ℃ to 9 ℃ to store up to fish or meat as well as vegetables do.

When the door 120 of the freezer compartment 114 of the conventional refrigerator operating in the above state is opened, the operation of the circulation fan 124 installed in the freezer compartment 114 by the door switch (not shown) is stopped to cool the air into the freezer compartment 114. Supply is interrupted. Therefore, as the outside hot air rides in from the top of the freezing compartment 114 without any resistance as shown by the arrow and flows downward, the cold air in the freezing compartment 114 easily flows out, thereby increasing the temperature in the freezing compartment 114.

Accordingly, after the door 118 is closed, in order to lower the temperature inside the freezer compartment 114, the compressor 140 compresses the refrigerant to generate a cooling effect in the cooler 122, and rotates the freezer compartment circulation fan 124. By supplying cold air into the freezer compartment 114, the temperature inside the freezer compartment 114 is lowered. However, as the door of the freezer compartment 114 opens, the outside hot air invades and the temperature in the freezer compartment 114 rises considerably. Therefore, in order to lower the temperature of the inside of the freezer compartment 114 to a predetermined reference or less, the compressor 140 for a long time. Since the evaporation effect should be obtained by operating the power loss, the power loss is increased, and the moisture contained in the hot air introduced from the outside becomes cold, resulting in the cooling of the cooler 122, thereby lowering the cooling efficiency.

The present invention has been made to solve the conventional problems, and an object of the present invention is to reduce the temperature in the freezer compartment by preserving cold air in the freezer compartment by preventing hot air from entering the freezer compartment when opening the freezer door of the refrigerator. To reduce the power loss, and to prevent moisture contained in the hot air is formed around the cooler to lower the cooling efficiency.

The present invention for achieving the above object, forming a cold air supply duct communicated to the front of the freezer compartment from the cooler on the upper surface of the freezer compartment, and installed a cross flow fan for blowing cold air to the front of the freezer compartment in the freezer compartment freezer compartment By forming an air curtain on the front side of the freezer compartment when the door is opened, it can be achieved by providing a freezer compartment cold intermittent structure of the refrigerator which prevents intrusion of hot outside air.

Figure 1 is a schematic diagram showing the air flow when the freezer door opening of a typical refrigerator.

Figure 2 is a schematic diagram showing a freezer compartment cold air control structure of the refrigerator according to the present invention.

Figure 3 is a schematic diagram showing the air flow when the freezer door opening of the refrigerator according to the present invention.

4 is a cross-sectional view showing a cold air supply duct and a cross flow fan according to the present invention.

<Explanation of symbols for main parts of drawing>

10 body 12 partition wall

20: freezer 22: cooler

24: freezer compartment circulation fan 26: refrigerator compartment circulation fan

28, 52: door 30, 54: pocket

32, 60: shelf 34, 56: circulation passage

36: supply port 40: cold air supply duct

42: cross flow fan 44: discharge port

46: step 50: cold room

58: multi duct 70: compressor

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the cooling structure of the refrigerator according to the present invention will be described in detail.

First, as shown in FIG. 2, the refrigerator body 10 is thermally insulated on all sides of the refrigerator body 10 except for the front surface, and divided into a freezing compartment 20 and a refrigerating compartment 50 by the partition wall 12. Doors 28 and 52 are hingedly installed on the front surfaces of the freezer compartment 20 and the refrigerating compartment 50, respectively, and pockets 30 and 54 which contain contents are provided on inner surfaces of the doors 28 and 52, respectively. Is installed.

On the rear side of the freezing chamber 20, a cooler 22 is provided in which the refrigerant compressed by the compressor 70 absorbs latent heat of evaporation to obtain a cooling effect, and an upper portion of the freezer compartment supplies air cooled by the cooler 22. A freezer compartment circulation fan 24 is installed to directly supply the freezer compartment 20 through the 36, and the refrigerating compartment 50 is provided through a multi duct 58 installed in the refrigerating compartment 50 at one side of the freezer compartment circulation fan 24. The refrigerator compartment circulation fan 26 which supplies cold air into the inside is provided. In the partition wall 12 of the bottom surface of the freezing chamber 20 and the upper surface of the refrigerating chamber 50, circulation passages 34 and 56 communicating from the freezing chamber 20 and the refrigerating chamber 50 to the cooler 22 are formed, respectively.

A cold air supply duct 40 is formed on the upper surface of the freezer compartment 20 of the refrigerator such that the cooler 22 communicates with the front side of the freezer compartment 20, and the cold air is provided in the cold air supply duct 40. The transverse flow fan 42 which blows by laminar flow is provided. The crossflow fan 42 is installed adjacent to the rear surface of the freezing chamber 20 to directly blow air cooled by the cooler 22 into the cold air supply duct 40.

As shown in FIG. 4, the cold air supply duct 40 has the same slit shape as the inside width of the refrigerating compartment 50, and the internal height of the cold air supply duct 40 gradually decreases toward the front of the freezing compartment 20. It is formed to lose. Therefore, the upper side of the laminar flow generated in the crossflow fan 42 has a faster speed than the lower side, and in order to enhance this effect, one or more steps 46 are formed on the inner lower surface of the cold air supply duct 40.

In addition, the cold air supply duct 40 is a discharge port curved downward from the upper side of the freezing chamber 20 so that the cold air blown by the cross flow fan 42 is smoothly rotated downward from the horizontal to the front of the freezing chamber 20 ( 44 is formed, and the cold air injection angle θ of the discharge port 44 is formed to be inclined by 5 ° to 20 ° to the outside of the freezing chamber 20.

Hereinafter, the operation of the freezer compartment cold air control structure of the refrigerator according to the present embodiment will be described.

As shown in FIG. 2, the refrigerator having the structure as described above has the freezing compartment 20 and the refrigerating compartment based on the information of the temperature sensors installed in the freezing compartment 20 and the refrigerating compartment 50, as shown in FIG. 2. When the temperature of 50 is greater than or equal to a predetermined reference, the controller controls the compressor 70 in the main body 10 to compress the refrigerant and supply the refrigerant to the cooler 22 to cool the air around the cooler 22. At this time, the freezer compartment circulation fan 24 installed on the upper side of the cooler 22 rotates to supply cold air directly into the freezer compartment 20 through the supply port 36 so that the pocket 30 of the door 28 of the freezer compartment 20 and The contents stored in the shelf 32 are frozen, and the refrigerating compartment circulation fan 26 installed in parallel with the freezer compartment circulation fan 24 also rotates to cool the air cooled by the cooler 22 through the multi-duct 58 through the refrigerating compartment 50. ) To cool the contents stored in the pocket 54 of the door 52 and the shelf 60 of the refrigerating chamber 50.

In this state, as shown in FIG. 3, when the door 28 of the freezer compartment 20 is opened, the controller detects the opening of the door 28 from the sensor installed in the door 28 and compresses the refrigerant of the compressor 70. By stopping, the cooling effect by the evaporation of the cooler 22 is temporarily suspended, and the lateral flow fan 42 installed in the cold air supply duct 40 above the freezing chamber 20 is rotated to form cold air in the freezing chamber 20 in the form of laminar flow. The air is blown into the cold air supply duct 40. Accordingly, the cool air in the cold air supply duct 40 moves to the discharge port 44 on the front side of the freezer compartment 20 and is injected downward along the curved surface of the discharge port 44 to form an air curtain on the front surface of the freezer compartment 20. Then, the process of circulating back to the cross flow fan 42 passes through the circulation passage 34 formed below the front surface of the freezing compartment 20.

As described above, since the cold air having the air curtain formed on the front surface of the freezing compartment 20 blocks the introduction of external hot air, the cold air inside the freezing compartment 20 does not leak to the outside, and thus the rapid temperature inside the freezing compartment 20 is increased. Prevent rise. In the above, the flow of laminar flow generated by the crossflow fan 42 is 5 kPa or more, and the lower end of the cold air supply duct 40 gradually narrows toward the front of the freezing chamber 20, and further, the inside of the cold air supply duct 40 Since the step 46 is formed at the lower end, the laminar flow generated in the cross flow fan 40 is a laminar flow having a higher upper side and a lower lower side. This laminar flow forms an air curtain, and then the coldest air at the innermost speed in the upper side of the freezer compartment 20 is first bent into the freezer compartment 20 by the suction force of the cross flow fan 40 and then through the supply port 36. The cold air is circulated to the cross flow fan 42, and the other cold air forms an air curtain to the bottom of the freezing compartment 20, and then rapidly disperses, thereby forming a circulation passage 34 formed on the bottom surface of the freezer compartment 20 by the suction force of the cross flow fan 40. It is circulated through the cooler 22 to the cross flow fan 42.

On the other hand, when the cross flow fan 40 is rotated to close the door 28 of the freezer compartment 20 while the air curtain is formed on the front surface of the freezer compartment 20, the door from the sensor installed in the freezer compartment 20 by the controller. Detects the closing of the 28 and stops the rotation of the cross flow fan 42, controls the compressor 70 to compress the refrigerant to cool the air around the cooler 22, and rotate the freezer compartment circulation fan 24 to cool To the freezer compartment 20 through the supply port 36 to freeze the contents stored in the freezer compartment 20. At this time, since the temperature of the pocket 30 installed in the door 28 is in contact with the outside air when the door 28 is opened, the portion of the pocket 30 is supplied by supplying cold air by the freezer compartment circulation fan 24. Since it takes some time to lower the temperature of the door, the crossflow fan 42 is rotated until the temperature is lower than the predetermined temperature in the state in which the door 28 is closed, thereby cooling the air cooled by the cooler 22 of the door 28. The contents stored in the pocket 30 may be quickly frozen by supplying the portion to the pocket 30.

When opening the door 28 of the freezer compartment 20 as described above, the cross flow fan 42 forms an air curtain on the front surface of the freezer compartment 20 to block intrusion of outside air to prevent cold air from flowing out of the freezer compartment 20. As a result, the outflow of cold air in the freezer compartment 20 is reduced, so that the time for operating the compressor 70 to reduce the temperature in the freezer compartment 20 when the door 28 of the freezer compartment 20 is closed is reduced. In addition, the intrusion of hot air is blocked by the air curtain formed on the front surface of the freezing chamber 20, thereby preventing the water contained in the hot air from being implanted in the cooler 22.

This phenomenon is more effective than the case where the freezing chamber 20 is maintained at -18 ° C, so that the cross flow fan 42 is installed in the refrigerating chamber 50 maintained at 0 ° C to 9 ° C to form an air curtain on the front side of the refrigerating chamber 50. Becomes large.

As described in the above embodiments, the refrigerator having a freezer compartment cold intermittent structure using the cold air for the air curtain according to the present invention has a cold air supply duct 40 communicating from the cooler 22 to the front of the freezer compartment 20 in the freezer compartment 20. And a cross flow fan 42 for blowing air cooled by the cooler 22 in the form of laminar flow in the cold air supply duct 40 to form an air curtain on the front surface of the freezing chamber 20. By preventing the external hot air from entering the freezer compartment 20 rapidly, by preserving cold air in the freezer compartment 20, the contents of the freezer compartment 20 are prevented from being deteriorated due to a rise in temperature, and the refrigerant of the compressor 70 By reducing the compression time to reduce the noise generation time and power consumption, there is an effect that can increase the cooling efficiency by preventing the moisture contained in the hot air is implanted in the cooler (22).

Claims (4)

In the refrigerator divided into the freezing compartment 20 and the refrigerating compartment 50 by the partition wall 12, the cooler 22 is provided on the rear surface of the freezing compartment 20, The cold air supply duct 40 formed on the upper surface of the freezer compartment 20 to communicate with the front surface of the freezer compartment 20 in the cooler 22 and the cold air supply duct 40 are installed in the cold air down the front of the freezer compartment 20. Refrigerator having a freezer compartment air-conditioning structure using an air curtain, characterized in that it comprises a cross flow fan (42) for spraying to form an air curtain. The refrigerator of claim 1, wherein the cross flow fan (42) is installed adjacent to the rear surface of the refrigerating chamber (50). The method of claim 1, wherein the cold air supply duct 40 has a slit shape the same as the inside width of the refrigerating compartment 50, the height of the inside gradually decreases toward the front of the freezer compartment 20, the upper side of the freezer compartment 20 Refrigerator having a freezer compartment air-conditioning structure using an air curtain, characterized in that the discharge port 44 is curved downward. The refrigerator of claim 3, wherein the cold air supply duct (40) has one or more steps (46) formed on an inner lower surface thereof.