KR20150053064A - refrigerator and control method thereof - Google Patents

Abstract

The present invention is to provide a refrigerator having an improved structure to induce falling water to a drain hose while improving cooling performance to solve stated problems. The refrigerator according to an embodiment comprises: a main body installed with a storage chamber therein; a fan circulating cool air to the storage chamber; a duct guiding the cool air discharged from the fan to the storage chamber; at least one drain hose connected to the duct, and discharging the falling water generated from the inside of the main body to the outside; and a falling water guiding unit including a body unit installed between the fan and the drain hose, and a damper installed on at least one side of the body unit, and rotating between a first location and a second location.

Description

{REFRIGERATOR AND CONTROL METHOD THEREOF}

The present invention relates to a refrigerator, and more particularly, to a refrigerator having an improved structure for increasing the flow of cool air or dripping water flowing in a duct.

Generally, a refrigerator is a household appliance that stores a food in a fresh state by having a storage room for storing food and a cooler for supplying cool air to the storage room.

The refrigerator has a plurality of storage compartments including a freezer compartment for cryopreserving the stored product and a refrigerating compartment for storing the refrigerated product, and the refrigerator repeatedly performs the compression-condensation-expansion-evaporation refrigeration cycle And maintains the internal temperature of the freezing chamber and the freezing chamber at the set target temperature, respectively.

Such a refrigerator is provided with a compressor, a condenser, an expansion valve (or capillary), an evaporator, and the like for performing a refrigerating cycle of compression-condensation-expansion-evaporation.

That is, the refrigerator drives at least one of the fans provided in the freezer compartment and the refrigerating compartment based on the target temperature of the freezer compartment and the target temperature of the refrigerating compartment so that the heat-exchanged air in the evaporator is blown into the storage compartment, .

The refrigerator for maintaining the internal temperature of the freezing compartment and the refrigerating compartment at each target temperature using one evaporator includes a flow path for guiding the cool air heat-exchanged in the evaporator into the freezing compartment and the refrigerating compartment, and a flow path for guiding the cold air in the refrigerating compartment to the freezing compartment and the evaporator .

In addition, the refrigerator may further include a damper installed in at least one flow path to open and close at least one flow path. In this case, the evaporator is disposed on the side of the freezing chamber, and the cold air heat-exchanged by the evaporator is supplied to the refrigerating chamber.

In such a refrigerator, the air in the refrigerating chamber flows into the evaporator, so that an impingement is formed on the evaporator, and a defrosting device may be provided to remove such impurities. At this time, in order to guide the falling water generated by the irrigation removal to the drain hose in the process of removing the frost formed on the evaporator by the defrosting device, a rhombic dropping guide portion is used at the center of the flow channel.

A generally used dropping guide can effectively drop the downfalling water from the top to the left / right of the center structure if it is larger than the width of the downwardly directed flow path.

At this time, if the width of the water drop guide portion is increased, the flow path resistance is increased to cause a decrease in the flow rate of the freezer and the refrigerator, which may lower the cooling performance.

On the other hand, if the downflow guide portion is miniaturized to improve the flow resistance, the downfall water may fall into the lower flow passage, which may cause clogging of the flow passage, which may cause a decrease in the flow rate of the freezer and the refrigerator.

Disclosure of Invention Technical Problem [8] The present invention provides a refrigerator having improved structure for introducing water to a drain hose while improving cooling performance.

More particularly, the present invention provides a refrigerator including a dewatering guide provided on at least one side surface of a damper.

Further, it is desirable to provide a refrigerator including a water drop guide portion provided to rotate around at least one rotation axis.

According to an aspect of the present invention, there is provided a refrigerator including a main body having a storage chamber therein, a fan circulating cool air to the storage chamber, a duct guiding cool air discharged from the fan to the storage chamber, At least one drain hose for discharging the dripping water generated inside the main body to the outside, and a damper installed on at least one side of the body part and between the first and second positions provided between the fan and the drain hose And a water drop guide portion.

In addition, the damper can be rotated in the first position direction to extend the width of the duct when cool air is supplied into the storage compartment.

Further, the damper can be rotated in the second position direction so as to guide the dropped water to the drain hose when the refrigerator is defrosting operation.

Also, the water drop guide part may be formed so that water flowing inside the duct branches right and left with respect to the front surface of the refrigerator.

Further, the damper may be provided as a shape memory alloy.

According to another aspect of the present invention, there is provided a refrigerator comprising: a main body having a storage chamber therein; a fan for circulating cool air to the storage chamber; a duct for guiding the cool air discharged from the fan to the storage chamber; At least one drain hose for discharging the dripping water generated in the drainage hose to the outside, a dripping water guide portion provided between the fan and the drain hose for rotating around at least one rotary shaft, and a control portion for controlling the rotation of the dripping water guiding portion .

Further, the dropout guide portion may have a bar shape.

In addition, the controller may control the water drop guide to extend the width of the duct when cool air is supplied into the storage chamber.

In addition, the control unit can control the water drop guide unit such that the width of the duct is narrowed when the refrigerator is defrosted.

According to the refrigerator of the present invention configured as described above, the following effects can be expected.

First, the flow resistance can be reduced due to the miniaturization of the falling water induction structure, which enables the flow rate to be discharged into the high-pressure side.

In addition, it is expected that the improvement of the cooling performance and the internal temperature can be expected through the increase of the discharge flow rate, so that the energy saving effect can be expected by shortening the operating time.

In addition, when the induction structure using a damper structure that does not use a separate component such as an electric motor is used, the inconvenience of assembling can be solved, and the cost reduction effect can be expected in terms of material cost.

1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a side elevational view of a refrigerator according to an embodiment.
3 is a rear elevation view of a refrigerator according to an embodiment.
FIG. 4 is a view illustrating a configuration of a first flow path including a dropping guide according to an embodiment.
FIGS. 5A and 5B are diagrams illustrating the operation of the damper installed in the water discharge guide portion of the refrigerator according to the embodiment, and the flow of cold air and dripping water flowing in the duct.
6 is a view showing the structure of a water drop guide part of a refrigerator according to another embodiment.
FIGS. 7A and 7B are diagrams showing the operation of the damper installed in the water drop guide portion of the refrigerator according to another embodiment, and the flow of cold air and dripping water flowing in the duct.

The embodiments described herein and the configurations shown in the drawings are merely exemplary embodiments of the present invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification.

In this regard, the refrigerator of the present invention includes an electronic refrigerator and an electronic kimchi refrigerator, and should be widely understood as including not only domestic but also industrial applications.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a refrigerator 100 according to an embodiment of the present invention. FIG. 3 is a side view of a refrigerator 100 according to an embodiment. Fig.

1, a refrigerator 100 includes a main body 110, storage rooms 120 and 121, and doors 130 and 131 and 132.

The main body 110 forms an outer appearance of the refrigerator 100, and the refrigerator 100 has a receiving space formed by the main body 110. The accommodation space is provided with an intermediate partition 111 and the accommodation space of the main unit 110 is divided into upper and lower portions by the intermediate partition 111. In this manner, the upper and lower receiving spaces defined in the main body 110 form a plurality of storage rooms 120 (121, 122) for storing food.

The storage room 120 includes a freezer compartment 121 as a first storage compartment for cryopreserving food and a refrigerating compartment 122 as a second storage compartment for refrigerating the food. In addition, an ice making chamber (not shown) for making ice may be provided in the freezing chamber 121.

At least one first hole 112 is formed in the inner wall surface of the main body 110 forming the freezing chamber 121. The at least one first hole 112 is a hole through which the cool air generated in the cool air generation chamber 140 flows into the freezing chamber 121. At least one shelf for storing food may be installed in the freezing chamber 121.

At least one second hole 113 is formed in the inner wall surface of the main body 110 forming the refrigerating compartment 122 and the plurality of second holes 113 are formed in the refrigerating compartment 122, respectively. Shelves and storage boxes for storing food can be mounted in the refrigerating compartment 122 and the positions of the second holes 112 provided in the refrigerating compartment 122 can be adjusted based on the mounting positions of the shelf and the storage box. .

The cool air of the freezing chamber 121 is transferred to the cool air generation room 140 on the rear surface of the freezing chamber 121 and the rear surface of the refrigerating chamber 122 with respect to the intermediate partition wall 111 partitioning the freezing chamber 121 and the refrigerating chamber 122, And a fourth hole 115 for transferring the cool air of the refrigerating chamber 122 to the cold generating chamber 140 may be formed. The cool air in the freezing chamber 121 is circulated through the first hole 112 and the third hole 114 and the cool air in the freezing chamber 122 is circulated through the second hole 113 and the fourth hole 115 .

The refrigerator 100 includes a door 130 (131, 132) for opening and closing an opening of the main body 110. The openings of the freezing compartments 121 and the refrigerating compartments 122 of the plurality of storage compartments 120 are opened and the doors 130 and 131 and 132 are rotatably installed at the openings of the freezing compartments 121 and the refrigerating compartments 122 Respectively. The door 130 (131, 132) shields the freezing chamber 121 and the refrigerating chamber 122 from the outside. In addition, a plurality of door shelves for storing food can be mounted on the inner surfaces of the doors 130 (131, 132).

2 and 3, the refrigerator 100 includes a cold generating room 140, a first duct 151, a second duct 152, and a machine room (not shown) formed in a space between the inner walls of the main body 110 160 and a refrigeration cycle unit 170.

The cool air generation room 140 may be located on the rear surface of the main body 110 where the freezing room 121 is located. The cool air generating chamber 140 is spatially connected to the freezing chamber 121 and the freezing chamber 122 through the first duct 151 and the second duct 152 to supply cool air to the freezing chamber 121 and the freezing chamber 122 And also receives cool air from the freezing room 121 and the refrigerating room 122. That is, the cool air generation room (140) is shielded from the outside by a space where the cool air is heat-exchanged and circulated.

The cool air generated in the evaporator 175 is blown into the cool air generation chamber 140 so that the cool air generated by the evaporator 175 and the cool air generated by the evaporator 175 are supplied to the freezing chamber 121 and the freezing chamber 122, A first fan 176 is provided.

The cool air generated in the evaporator 175 can be supplied to the freezing chamber 121 and the refrigerating chamber 122 by the rotational force of the first fan 176 and the cool air generated in the freezing chamber 121 and the refrigerating chamber 122 can be supplied to the freezing chamber 121 140, respectively.

The cool air generation chamber 140 includes a discharge hole 141 for discharging the cool air generated by the evaporator 175 and a suction hole 142 for sucking the cool air from the freezing chamber 121 and the refrigerating chamber 122. Here, the discharge hole 141 may be formed around the first fan 176, and the suction hole 142 may be formed around the evaporator 175.

The duct 150 is a space through which cool air flows and includes a first duct 151 for guiding the cool air generated in the cool air generating chamber 140 to the freezing room 121 and the refrigerating chamber 122, And a second duct 152 for guiding the cool air of the cool air generation chamber 122 to the cool air generation room 140.

The first duct 151 is disposed between the cool air generation chamber 140 and the freezing chamber 121 and includes a first flow path 151a for guiding the cool air generated in the cool air generation chamber 140 to the freezing chamber 121, And a second flow path 151b extending from the flow path 151a to the rear surface of the refrigerating chamber 122 and guiding the cool air generated in the cold generating room 140 to the refrigerating chamber 122. [

The first flow path 151a receives the cool air generated in the cool air generation chamber 140 and supplies a part of the cool air to the freezing chamber 121 through the first hole 112, And supplies the refrigerant to the refrigerating chamber 122 through the second hole 113 formed in the second flow path 151b. The wall surface of the first flow path 151a is a wall surface having the first hole 112 and the wall surface of the second flow path 151b is a wall surface having the second hole 113. The first hole 112, The cold air can be discharged to the freezing room 121 and the refrigerating room 122 through the second hole 113. [

That is, the cool air supplied to the freezing chamber 121 is the cool air supplied through the cool air generation chamber 140, the first flow path 151a of the first duct 151 and the first hole 112, The supplied cool air is cool air supplied through the cool air generation room 140, the first flow path 151a, the second flow path 151b, and the second hole 113 of the first duct 151.

The first flow path 151a is provided with a drop discharge guide portion 190-1 for improving the flow of the flow path. The drainage guide unit 190-1 is a structure provided to introduce the drain water flowing into the first flow path 151a into the drain hose (not shown) and is installed between the fan 176 and the drain hose And a damper (not shown) installed on at least one side of the body part 192 and the body part 192 to rotate between the first position and the second position. The drain hose (not shown) is connected to the first flow path 151a and connected to the drain cylinder 193 provided in the machine room 160 for discharging the dripping water generated in the main body to the outside, do. A detailed description will be given below with respect to the water drop guide portion 190-1 provided in the first flow path 151a.

The second duct 152 is located around the first duct 151. For example, the second duct 152 is located on the rear or side of the first duct 151.

The second duct 152 includes a third flow path 152a disposed between the cool air generation chamber 140 and the freezing chamber 121 to guide the cool air in the freezing chamber 121 to the cool air generation chamber 140, And a fourth flow path 152b extending to the rear surface of the refrigerating compartment 122 from the refrigerating compartment 152a to guide the cold air in the refrigerating compartment 122 to the cold generating room 140. [

The third flow path 152a of the second duct 152 guides the cool air in the freezing chamber 121 to the vicinity of the evaporator 175 of the cool air generation chamber 140 through the third hole 114, 152b guide the cold air in the refrigerating chamber 122 to the vicinity of the evaporator 175 of the cold generating room 140 through the fourth hole 115. [ Thereby facilitating the heat exchange of the air in the cold generating chamber 140. A third hole 114 is formed in a wall surface of the third flow path 152a and a fourth hole 115 is formed in a wall surface of the fourth flow path 152b.

The first duct 151 and the second duct 152 spatially connect the cool air generation room 140, the freezing room 121, and the refrigerating room 122. Therefore, not only the cold air in the cold room 140 but also the cold air in the freezer room 121 can be supplied to the cold room 122.

The refrigerator 100 further includes a damper 153 installed in the first duct 151 and the second duct 152 to open and close the inner space of the first duct 151 and the inner space of the second duct 152 do. The damper 153 is located inside the second flow path 151b of the first duct 151 and inside the fourth flow path 152b of the second duct 152. At this time, The damper may be a single damper that is integrally formed by rotating the motor using the rotational force of the motor.

The damper 153 performs opening and closing operations for opening and closing the second flow path 151b of the first duct 151 and the fourth flow path 152b of the second duct 152 based on the temperature of the refrigerating chamber 122 The cooling air generated in the cold generating room 140 is prevented from being supplied to the cold storage room 122 through the closing operation and the cold air in the cold storage room 122 is prevented from being supplied to the cold generating room 140.

The refrigerator (100) further includes a machine room (160) formed at a lower rear portion of the main body (110). The machine room 160 may include an opening and a cover 161 for opening and closing the opening. When the machine room 160 further includes the cover 161, the machine room 160 can be opened and closed by the cover 161. [

A part of the refrigeration cycle unit 170 may be disposed in the machine room 160. More specifically, the machine room 160 is provided with a compressor 171 for compressing the refrigerant and discharging the refrigerant at a high temperature and a high pressure, a condenser 172 for condensing the refrigerant compressed by the compressor 171 at high temperature and high pressure through heat radiation, A capillary 173 for decompressing the refrigerant condensed in the condenser 172 and a second fan 174 for cooling the condenser 172 may be provided.

The capillary tube 173 is connected to the evaporator 175 in the cool air generating chamber 140 through the inside of the main body 110 to supply the reduced pressure refrigerant to the evaporator 175. It is also possible to use an expansion valve instead of the capillary tube 173.

The evaporator 175 cools ambient air by a cooling action absorbing latent heat when the reduced pressure refrigerant is supplied from the capillary tube 173, and supplies the gaseous refrigerant to the compressor 171 again.

The first fan 176 is installed in the evaporator 175 so that the air in the freezing compartment 121 and the refrigerating compartment 122 is sucked and the air passing through the evaporator 175 flows into the freezing compartment 121 and the refrigerating compartment 122 A blowing force is applied to the cool air to be discharged.

That is, the machine room 160 and the cool air generation room 140 are spatially separated, but share the refrigeration cycle unit 170 integrally formed through the coolant pipe.

The machine room 160 may be provided with a drain cylinder 193 for collecting dripping water flowing into the drain hoses 195 (195a, 195b) branching from the first flow path 151a. The water droplets collected in the drain cylinder 193 can be periodically discharged to the outside.

4 is a view showing the structure of the first flow path 151a of the refrigerator 100 including the water drop guide part 190-1 according to the embodiment.

As shown in FIG. 4, the refrigerator 100 according to one embodiment is provided with a water discharge guide portion 190-1 inside the first flow path 151a.

The water drop guide portion 190-1 is a structure provided to prevent falling water formed in the defrosting operation from flowing into the second flow path 151b. The water drop guide portion 190-1 has a cross section as viewed from the front of the refrigerator 100, And the water flowing inside the duct 150 may be branched to the left and right with respect to the front surface of the refrigerator 100. [ More specifically, the dropout guide includes a body portion 192 and a damper installed on at least one side of the body portion 192 and rotating between the first position and the second position.

Hereinafter, the first position means the position of the damper when the damper is folded to the lower portion of the body portion 192 so that the width of the flow path formed by branching by the water drop guide portion is formed larger than the width of the drop discharge guide portion, When the damper is extended to the left and right of the body portion 192 with respect to the front surface of the refrigerator 100 so that the width of the flow path branched by the guide portion is smaller than the width of the drop water guide portion, .

Generally, when the width of the flow path branched by the dropping guide portion 190-1 is smaller than the width of the dropping guide portion 190-1, the dropping guide portion 190-1 can exert its function properly . However, in this case, the internal resistance of the duct 150 may increase due to the water drop guide 190-1, which may lower the cooling performance of the refrigerator 100. [ Accordingly, the refrigerator 100 according to one embodiment is provided to be rotatable by providing a damper 191 on at least one side of the body part 192.

The dampers 191 (191a, 191b) are designed to reduce the flow resistance of the first flow path (151a) when the downfalling guide portion (190-1) And the drain water flowing through the first flow path 151a is led to the drain hose 195 (195a, 195b) when rotating in the second position direction.

The dampers (191: 191a, 191b) may be formed to change their shape according to temperature. In this case, the dampers (191: 191a, 191b) according to one embodiment may be made of a shape memory alloy material. The dampers 191a and 191b may be provided so as to be rotatable by a motor so that a motor is installed at a coupling portion of the body 192 and the dampers 191a and 191b. Can be rotated by means of a rotating means within a range that can easily be conceived by a person who has knowledge of the present invention.

Hereinafter, the rotation of the dampers (191: 191a, 191b) included in the water drop guide portion of the refrigerator (100) according to one embodiment will be described in detail.

5A and 5B are views showing the operation of the dampers 191 and 191b installed in the water discharge guide portion 190-1 of the refrigerator 100 according to the embodiment and the flow of cold air or dripping water flowing in the duct 150. [ FIG. 5A is a view showing the operation of the dampers 191, 191a and 191b when cool air is supplied into the storage chamber 120, FIG. 5B is a view showing the operation of the drain hoses 195: 195a and 195b (191a, 191b) when dripping water is discharged through the dampers (191, 191a, 191b).

Referring to FIG. 5A, the arrow indicates the flow of cold air. Part of the cool air discharged to the first flow path 151a through the first fan 176 is supplied to the freezing chamber 121, And is discharged to the second flow path 151b via the flow path formed by branching by the first flow path 190-1. At this time, the dampers 191 (191a, 191b) rotate in the first position direction so that the cold air can more effectively pass through the flow path formed by the water drop guide portion 190-1.

5B, the arrow indicates the flow of water. The water produced by the defrosting flows into the first flow path 151a through the first fan 176, and the water flowed into the first flow path 151a Is branched by the water drop guide 190-1 and discharged to the outside through the drain hose 195 (195a, 195b). At this time, the dampers 191a and 191b are extended to the left and right of the drop outlet guide 190-1 on the basis of the front surface of the refrigerator 100 so that the drop water is effectively supplied to the drain hose 195 (195a, 195b) So as to take a structure in which the second position is to be taken.

6 is a view showing the structure of the water drop guide unit 190-2 included in the refrigerator 100 according to another embodiment. The description of the configuration overlapping with the above-described FIG. 1 to FIG. 5 with respect to FIG. 6 will be omitted.

Referring to FIG. 6, the refrigerator 100 according to another embodiment includes a water discharge guide portion 190-2 that rotates about at least one rotation axis, and a control portion that controls rotation of the water discharge guide portion 190-2 . FIG. 6 shows a case where one drop guide portion 190-2 rotates around one rotation axis. However, the present invention is not limited thereto, and it is possible to use the drop guide portion 190-2 within a range that can be easily devised by those skilled in the art It should be understood as a concept including a change implementation.

As shown in FIG. 4, the dropping guide unit 190-2 may have a rhombic shape and may have a bar shape as shown in FIG.

Further, the dropping guide portion 190-2 may be provided so as to be rotatable in a direction parallel to the flow direction of the cool air by the motor. More specifically, the drop guide portion 190-2 can be rotated in a direction parallel to the flow direction of cold air, so that the resistance inside the flow path can be more effectively reduced. On the other hand, the dropping guide portion 190-2 is provided so as to have a bar shape, so that the resistance inside the flow path can be effectively reduced.

The control unit controls the rotation of the water drop guide unit 190-2 according to the operation mode of the refrigerator 100. [ More specifically, when cold air is supplied into the storage chamber 120 of the refrigerator 100, the water discharge guide unit 190-2 is positioned in parallel with the flow direction of the cold air so as to extend the width of the first flow path 151a It is possible to control the dropping guide unit 190-2.

When the refrigerator 100 is in the defrosting operation, the water discharge guide portion 190-2 guides the flow of dew water to the drain hose 195 (195a, 195b) so that the width of the first flow path 151a is narrowed. (190-2) can be controlled.

7A and 7B are views for explaining in detail the operation of the water discharge guide portion 190-2 of the refrigerator 100 and the flow of cold water or dripping water flowing in the duct 150 according to another embodiment, FIG. 7B is a view illustrating the operation of the water drop guide unit 190-2 when cool air is supplied into the storage chamber 120. FIG. 7B is a view showing the operation of the water drop guide unit 190-2 when the water drop is discharged through the drain hose 195 (195a, 195b) (190-2).

Referring to FIG. 7A, the arrow indicates the flow of cold air. Part of the cool air discharged to the first flow path 151a through the first fan 176 is supplied to the freezing chamber 121, Is discharged to the second flow path 151b through the flow path formed by the first flow path 190-2. At this time, the water discharge guide portion 190-2 can be controlled to be positioned in parallel with the flow direction of the cool air so that cool air can pass through the flow path more effectively.

7B, the arrow indicates the flow of water. The water generated by the defrosting flows into the first flow path 151a through the first fan 176, and the water flowed into the first flow path 151a Is branched by the water drop guide portion 190-2 and discharged to the outside through the drain hose 195 (195a, 195b). At this time, the drainage guide portion 190-2 may be controlled to be positioned in parallel with the bottom surface of the refrigerator 100 so that the drainage water is effectively supplied to the drain hose 195 (195a, 195b).

100: refrigerator 110: main body
111: intermediate bulkhead 112: first hole
113: second hole 114: third hole
115: Fourth hole 120: Storage room
121: Freezer 122: Refrigerator
130: Door 140: Cold generating room
150: duct 160: machine room
170: a refrigeration cycle unit 190 (190-1, 2)
191 (191a, b): damper 192:
193: drain cylinder 195: drain hose

Claims (9)

A main body having a storage chamber therein;
A fan circulating cool air to the storage chamber;
A duct for guiding cool air discharged from the fan to the storage chamber;
At least one drain hose connected to the duct and discharging drain water generated in the main body to the outside; And
And a damping guide provided on at least one side of the body, the dampers being rotatable between a first position and a second position between the fan and the drain hose. The method according to claim 1,
The damper includes:
And when the cold air is supplied into the storage compartment, the refrigerating compartment is rotated in the first position direction so as to expand the width of the duct. The method according to claim 1,
The damper includes:
And when the refrigerator is defrosting operation, rotates in the second position direction to guide the drain water to the drain hose. The method according to claim 1,
The water drop guide part
Wherein the water flowing inside the duct is branched to the left and right with respect to the front surface of the refrigerator. The method according to claim 1,
Wherein the damper is formed of a shape memory alloy. A main body having a storage chamber therein;
A fan circulating cool air to the storage chamber;
A duct for guiding cool air discharged from the fan to the storage chamber;
At least one drain hose connected to the duct and discharging drain water generated in the main body to the outside;
A water drop guide provided between the fan and the drain hose and rotating about at least one rotation axis; And
And a control unit for controlling the rotation of the water drop guide unit. The method according to claim 6,
Wherein the water drop guide portion has a bar shape. The method according to claim 6,
Wherein,
And controls the water drop guide unit to extend the width of the duct when cold air is supplied into the storage chamber. The method according to claim 6,
Wherein,
And controls the water drop guide portion so that the width of the duct is narrowed when the refrigerator is defrosted.

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