KR101151089B1 - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator having a cold air inlet configured to uniformly supply cold air to a drawer installed in the refrigerator.

In the refrigerator according to the present invention, a refrigerator including a cold air supply device 380 installed on the inner rear side of the refrigerator main body 100 to supply cold air to the inside of the refrigerator, the refrigerator is provided on one side of the main body 100. And a drawer drawer 420 which can receive the drawer and draws back and forth; It is formed through the back of the drawer drawer (420), and comprises a plurality of cold air inlet (424) for the uniform inflow of cold air supplied from the cold air supply (380); The plurality of cold air inlets 424 are densely formed away from the near side from the cold air supply device 380. According to the present invention having such a configuration, the cold air is evenly introduced into the drawer to improve the storage state of the food.

Refrigerator, chill, equality, supply, drawer, chill inlet

Description

Refrigerator {Refrigerator}

1 is a perspective view showing a state in which the drawer-type door of the refrigerator according to the prior art is opened.

Figure 2 is a partial perspective view showing a drawer drawer drawer according to the prior art.

Figure 3 is a perspective view showing an open state of the door of the refrigerator employing a preferred embodiment of the refrigerator according to the present invention.

Figure 4 is an exploded perspective view showing the configuration of a double drawer employing a preferred embodiment of the refrigerator according to the present invention.

5 is a cross-sectional view showing a cold air inlet which is a main component of a preferred embodiment of the refrigerator according to the present invention;

6 is a cross-sectional view showing a cold air inlet which is a main component of another embodiment of the refrigerator according to the present invention;

7 is a partial perspective view showing a cold air inlet which is a main component of another embodiment of the refrigerator according to the present invention;

8 is a partial perspective view showing a cold air inlet which is a main component of another embodiment of the refrigerator according to the present invention;

9 is a schematic diagram schematically showing a cold air supply structure of a double drawer employing a preferred embodiment of the refrigerator according to the present invention.

Explanation of symbols on the main parts of the drawings

100. main body 200. refrigerator

220. Rotating door 300. Drawer room

320. Drawer door 340. Storage box

360. 3-stage rail 380. Cold air supply system

400. Double Drawer 420. Drawer Drawer

422. Front Plate 424. Cold Air Inlet

424 '. Information board 424 ''. Connection

426. First rolling member 440. Supplementary drawers

442. Second rolling member 444. Sliding guide

450. Drawing rail 460. Guide rail

The present invention relates to a refrigerator drawer, and more particularly, to a refrigerator configured to have a cold air inlet for supplying cool air evenly to a drawer drawer mounted on the refrigerator.

In general, a refrigerator is a device for low temperature storage of food, and stored in a refrigerator or refrigerated according to the state of the food to be stored. The cold air supplied to the inside of the refrigerator is generated by the heat exchange action of the refrigerant, is continuously supplied into the refrigerator while repeatedly performing a cycle of compression, condensation, expansion, and evaporation, and the supplied refrigerant is supplied by convection. It is evenly distributed inside the refrigerator to store food in the refrigerator at a desired temperature.

1 is a perspective view showing a state in which a drawer-type door of a refrigerator according to the prior art is opened, and as shown in the drawing, the main body 1 of the refrigerator is formed in a rectangular shape, and the left and right sides of the main body 1 are left and right. A rotary door 10 that can be selectively opened and closed is formed, and a drawer-type door 12 which is slideable in the front and rear and can be pulled out and drawn in is formed at the bottom thereof.

Although not shown, a refrigerator compartment and a freezer compartment are formed inside the refrigerator body 1 to store various foods in a refrigerator or freezer, and various shelves or drawers in each refrigerator compartment and a freezer compartment to suit various food characteristics. , A tray and the like are configured.

On the other hand, the lower part of the refrigerator main body (1) is drawn out / drawn in by the drawer-type door 12, a drawer chamber 20 for storing food is formed. The drawer room 20 is a place used as a freezer compartment mainly stores meat or fish or food that requires long-term storage, and a plurality of storage spaces of different sizes to store a variety of food from large to small food It consists of

The drawer room 20 is provided with a storage box 30 for storing relatively large food, and a drawer drawer 40 for storing food smaller than the food stored in the storage box 30. The storage box 30 is a large sized food or food that does not require classification is stored.

The upper end of both sides of the storage box 30 is fixed to one side of the rail (Rail, 50) consisting of three stages, the other side of the rail 50 is fixed to both sides of the inside of the refrigerator body (1). Therefore, the storage box 30 is guided by the rail 50 when the storage box 30 is pulled out / retracted in conjunction with the drawer door 12 is pulled out / retracted.

And, the withdrawal drawer 40 is installed on the upper end of the storage box 30, the drawer drawer 40 will be described in more detail with reference to Figure 2, the drawer drawer 40 is approximately rectangular The drawer is formed on one side of the left and right sides of the drawer chamber 20.

The upper side of the drawer drawer 40 is open, and the front plate 42 is formed on the front of the drawer drawer 40 to form a part of the front appearance of the drawer drawer 40. And, the upper side of both sides of the drawer drawer 40 is formed with a rail mounting bracket 44 to which the rail 50 to be described below is fixed.

The drawer drawer 40 slides back and forth along the rail 50 while being withdrawn / inlet, allowing the user to store desired food.

In addition, the rail 50 is installed on the side wall of the drawer chamber 20 and is fixed to the movable rail 52 and the drawer drawer 40 is installed as a moving rail 54 while sliding forward and backward sliding. Each rail is integrally formed and coupled.

On the other hand, although not shown, a cold air supply device is provided at the center of the rear of the drawer chamber 20 to supply cool air for cooling the inside of the drawer chamber 20. The cold air supply device discharges cold air from the center of the rear of the drawer chamber 20 to the front to store the foods stored in the storage drawer 30 and the drawer drawer 40 and the like in a frozen or refrigerated manner.

However, the drawer drawer of the refrigerator configured as described above has the following problems.

The cold air supply device for supplying cold air to the inside of the drawer chamber 20 is installed in the central portion of the rear of the drawer chamber 20 to supply cold air to the front. Therefore, in the case of the drawer occupying the entire transverse direction in the lower side of the drawer room 20, such as the storage drawer 30, the inside of the drawer is relatively evenly cooled by the cold air supplied from the center.

However, when the drawer 40 is mounted above the drawer chamber 20 and the rear side of the drawer is shielded, the cooling performance of the drawer is somewhat lowered.

When the drawer drawer 40 is mounted to the right or left side with respect to the center of the drawer chamber 20, the cold air flowing into the drawer is biased toward the cold air supply device so as to be biased. 40 will cause a difference in the cooling performance.

This results in a different refrigeration condition depending on the location where the food stored in the drawer drawer 40 is stored, thereby reducing the food storage performance.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a refrigerator configured to have a cold air inlet for supplying cold air evenly to a drawer drawer mounted on the refrigerator.

According to a feature of the present invention for achieving the above object, the present invention is a refrigerator including a cold air supply device is installed on the inner rear of the refrigerator main body to supply cold air to the inside of the refrigerator, the one side of the main body A drawer drawer provided for storing food and drawing in and out; It is formed through the back of the drawer drawer, it comprises a plurality of cold air inlet for even inflow of cold air supplied from the cold air supply device; The plurality of cold air inlets are formed denser as the distance from the near side in the cold air supply device.

The drawer drawer has a space formed therein and is seated on an auxiliary drawer having a drawer rail to assist withdrawal / mouthing of the drawer drawer.

The auxiliary drawer is installed on the wall of the side of the main body, respectively, is withdrawn / drawn along the guide rail for guiding sliding of the auxiliary drawer.

The plurality of cold air inlets are formed to be smaller in size as the size of the side closer to the cold air supply device is larger and farther.

The plurality of cold air inlets are formed at the same size and intervals, and one side end of each cold air inlet is formed to protrude to have a predetermined inclination to form a guide plate for guiding the inflow direction of cold air of the cold air.

The plurality of cold air inlets are formed at the same size and interval, and the connection portion between each of the coolant inlets is twisted to have a predetermined angle to adjust the direction of the cold air.

According to the present invention having such a configuration, there is an advantage that the cold air flows into the inside of the drawer drawer evenly to improve the storage state of the food.

Hereinafter, a preferred embodiment of a refrigerator according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing an open state of a door of a refrigerator employing a preferred embodiment of the refrigerator according to the present invention. As shown in the drawing, the refrigerator main body 100 includes a refrigerating chamber 200 and a drawer chamber 300. It is composed.

The refrigerating chamber 200 is formed on the upper portion of the main body 100, and divided into two parts on the left and right sides. In the refrigerating compartment 200, various types of trays, shelves, and drawers are installed to partition the space of the refrigerating compartment 200 in order to efficiently store various kinds of foods.

Therefore, the cold air supplied from one side of the main body 100 is affected by the flow of the tray, the shelf and the drawers, thereby limiting or adjusting the convection of the cold air. The user can store and store suitable foods according to the temperature characteristics due to the difference in the cold air supply.                     

On the other hand, the rotary door 220 to shield the upper refrigerating chamber 200 of the main body 100 is formed on the left and right sides of the main body 100, respectively, the respective rotary doors 220 are both sides of the main body 100 It is hinged at the end and installed to be rotatable outward.

Therefore, the rotary door 220 separately shields the left and right sides of the refrigerating chamber 200 to form an independent space, and if necessary, one portion of the refrigerating chamber 200 may be used as the freezing chamber.

Handles are formed at one side of the rotary door 220 to allow the user to easily open and close the rotary door 220. In addition, the rotary door 220 may be installed such that a home bar or a water purifier to purify a drink may be exposed to the outside as needed.

On the other hand, a drawer chamber 300 is formed below the main body 100 in which the refrigerating chamber 200 is formed. The drawer chamber 300 is mainly used as a freezer compartment as a storage space that can be pulled out in the form of a drawer. The drawer room 300 has a separate cold air supply device 380 as a place for freezing and storing fish or meat or foods that require long-term storage to exhibit a strong cooling capacity.

The cold air supply device 380 is formed in at least one central portion of the rear of the drawer chamber 300, the front of the cold air from the upper side of the rear of the drawer chamber 300 in order to supply the cold air to the entire drawer chamber (300) Will be discharged.

In addition, the drawer room 300 is not only a freezer, but also can be used as a refrigerator if necessary. In this case, the space may be configured to store fruits or vegetables or food of relatively large or heavy weight, which is difficult to contain in a container.

A drawer type door 320 is formed on the front surface of the drawer chamber 300 to shield the inside of the drawer chamber 300. The lower end of the drawer door 320 is hinged to the lower end of the storage box 340 for storing food, the storage box 340 is equipped with a three-stage rail 360 extending in multiple stages while sliding back and forth.

In addition, one side of the three-stage rail 360 is fixed to both inner wall surfaces of the drawer room 300 so that the storage box 340 can slide back and forth along the three-stage rail 360, The storage box 340 and the drawer door 320 are pulled out / retracted together by pushing or pulling a handle formed above the drawer door 320.

On the other hand, the upper portion of the drawer chamber 300 is divided into both left and right sides, one side of the double drawer 400 for storing foods that need to be separated and stored so as not to mix with food or other foods somewhat small to store in the storage box 340 Is formed.

4 is an exploded perspective view showing the structure of a refrigerator according to the present invention. Referring to the double drawer in detail with reference to the drawings, the double drawer 400 is a drawer drawer 420 and an auxiliary drawer 440. And it is composed of a guide rail (460).

The drawer drawer 420 is formed to have a rectangular shape in which food for storage is accommodated, and a part of the front surface and the entire upper surface of the drawer drawer 420 are formed. In addition, the upper end portions of both side ends and the upper surface of the drawer drawer 420 are bent in a predetermined width vertically outward.

The front surface of the drawer drawer 420 forms a front shape of the drawer drawer 420, and a front plate 422 is formed to serve as a handle when the drawer drawer 420 is withdrawn / received. The front plate 422 may be formed of a transparent material so as to see through the interior as needed.

The cold air inlet 424 is formed on the rear surface of the drawer drawer 420. The cold air inlet 424 is to allow the cool air supplied from the rear side of the drawer chamber 300 to enter the inside of the drawer drawer 420 is formed in the longitudinal direction on the back of the drawer drawer 420.

5 is a cross-sectional view showing a cold air inlet which is a main component of a preferred embodiment of the refrigerator according to the present invention. Referring to the drawings, the cold air inlet is described in more detail. Cold air inlets 424 are formed.

The plurality of cold air inlets 424 are formed long in the longitudinal direction, the size and width of each are formed the same. However, when the drawer drawer 420 is mounted, the cold air inlet 424 adjacent to the cold air supply device 380 is formed to be somewhat wider, and the distance to the cold air supply device is somewhat narrower.

That is, the cold air inlet 424 on the back side of the drawer drawer 420 is formed narrower from one side to the other side. In more detail, when the drawer drawer 420 is mounted on the upper right side of the drawer chamber 300, the cold air supply device 380 is formed at an approximately rear center portion of the drawer chamber 300, and thus the drawer drawer 420. Adjacent to the back left.

Accordingly, the plurality of cold air inlets 424 formed on the rear side of the drawer drawer 420 are formed to have a wider gap on the left side, and the gap between the cold air inlets 424 is gradually narrowed toward the right side.

Therefore, when the cold air generated by the cold air supply device 380 is introduced into the drawer drawer 420 through the cold air inlet 424 on the rear side of the drawer drawer 420 and the cold air supply device 380. In the near side, strong cold air flows less, and in the far side from the cold air generating device, a lot of weak cold air flows into the cold air evenly.

6 to 8 are views illustrating a cold air inlet which is a main component of another embodiment of the refrigerator according to the present invention, and looks at the shape of the cold air inlet as shown in the following figures.

As shown in FIG. 6, a plurality of cold air inlets 424 are formed at roughly the rear surface of the drawer drawer 420. The plurality of cold air inlets 424 are formed at the same interval, the width of the cold air inlet 424 from one side to the other side is formed to widen.

When the cold air supply device 380 is installed at an approximately center portion of the rear side of the drawer chamber 300, and the drawer drawer 420 is mounted on the upper right side of the drawer chamber 300, the left side of the drawer drawer 420 is provided. The cold air supply device 380 is adjacent to.

Therefore, the width of the cold air inlet 424 becomes wider from the left side to the right side, so that the left side adjacent to the cold air supply device 380 is cold but the inflow is relatively small, and the width of the cold air inlet 424 increases toward the right side. The cold air supplied into the drawer drawer 420 as a whole is widened because relatively weak cold air is introduced.

As shown in FIG. 7, a plurality of cold air inlets 424 are formed at roughly the rear surface of the drawer drawer 420. The cold air inlet 424 is all formed in the same size and shape. However, the guide plate 424 ′ protruding inward is formed at the left side or the right side of the cold air inlet 424.

The guide plate 424 ′ is relatively far from the cold air supply device 380 when the cold air supplied from the cold air supply device 380 is introduced into the drawer drawer 420 through the cold air inlet 424. It is to be able to supply cold air even inside the drawer drawer 420.

The guide plate 424 ′ is formed at the left side or the right side of the cold air inlet 424, and is formed to be inclined at a predetermined angle away from the side where the cold air supply device 380 is formed. When the cold air supply device 380 is installed at an approximately center portion of the rear side of the drawer drawer 300, the guide plate 424 ′ is formed to protrude to the inside of the drawer drawer 420 and has a predetermined angle from left to right. It is formed to have.

Therefore, when cold air is discharged from the cold air supply device 380, cold air is introduced into the drawer drawer 420 via the cold air inlet 424, and the cold air introduced at this time is diagonally formed by the guide plate 424 ′. Flows in the direction. As a result, the cold air may be introduced into the drawer drawer 420 to a place far away from the cold air supply device 380.

As illustrated in FIG. 8, a plurality of cold air inlets 424 are formed at roughly the rear of the drawer drawer 420. The cold air inlet 424 is all formed in the same size and shape. However, between the plurality of cold air inlet 424 is formed a connecting portion 424 ″ twisted at a predetermined angle.

The connection part 424 ″ is relatively far from the cold air supply device 380 when the cold air generated in the cold air supply device 380 is introduced into the drawer drawer 420 through the cold air inlet 424. The drawer drawer 420 is to be able to supply cold air even inside.

The connection part 424 ″ is twisted at a predetermined angle between the plurality of cold air inlets 424. At this time, the cold air supply device 380 is closer to the rear side and the far side is formed to be twisted forward, the angle is adjustable according to the size of the drawer 420.

On the other hand, when the cold air supply device 380 is installed in the center of the rear of the drawer room 300 and the drawer drawer 420 is mounted on the upper left side of the drawer room 300, the drawer drawer 420 The left side of the rear is closer to the cold air supply device 380 than the right side.

Therefore, the connection portion 424 ″ of the rear side of the drawer drawer 420 is twisted so that the left side is recessed rearward and the right side protrudes forward, so that the cold air generated from the cold air supply device 380 is relatively cold. It is possible to smoothly supply cold air to the right front of the drawer drawer that cannot be supplied smoothly.                     

On the other hand, both side surfaces of the drawer drawer 420 is provided with a first rolling member 426, respectively. The first cloud member 426 is to be able to slide the drawer drawer 420 smoothly is formed on the rear end of both sides of the drawer drawer 420.

The first rolling member 426 may be provided with a roller formed of the same material as the drawer drawer 420, or a rolling member such as a bearing may be used as necessary. The drawer drawer 420 is seated in the auxiliary drawer 440, and is withdrawn while sliding back and forth in the inside of the auxiliary drawer 440.

The auxiliary drawer 440 is formed in a generally rectangular shape, and is formed somewhat larger than the drawer drawer 420 so that the drawer drawer 420 may be seated.

 The front of the auxiliary drawer 440 is fully open so that the drawer drawer 420 seated inside the auxiliary drawer 440 is easily slid forward, and the upper surface of the auxiliary drawer 440 is opened to draw out the drawer. Recognition inside the drawer 420 and storage of food more easily.

In addition, the rear of the auxiliary drawer 440 is formed so that the upper one side is opened, the rear of the auxiliary drawer 440 is formed so as not to shield the cold air inlet 424 of the back of the drawer drawer 420. That is, the upper portion of the rear side of the auxiliary drawer 440 is opened so that the cold air supplied from the cold air supply device 380 can smoothly flow into the cold air inlet 424 of the drawer drawer 420.

Drawout rails 450 are formed on both side surfaces of the auxiliary drawer 440. The withdrawal rail 450 guides the rolling motion of the first cloud member 426 formed at both sides of the drawer drawer 420 so that the drawer drawer 420 can be accommodated. ) Is formed at a position corresponding to the first cloud member 426 when seated on the auxiliary drawer 440.

In addition, an insertion part 452 is formed at the rear end of the withdrawal rail 450. The insertion part 452 serves as an insertion path of the first rolling member 426 and is formed to be opened upward from the rear end of the drawing rail 450.

In addition, both side surfaces of the auxiliary drawer 440 is provided with a second rolling member 442. The second rolling member 442 allows the auxiliary drawer 440 to slide along the guide rail 460 to be described below, and has the same structure as the first rolling member 426.

The second rolling member 442 is installed above the second half of the auxiliary drawer 440, that is, above the withdrawal rail 450. A sliding guide 444 is formed from a position where the second rolling member 442 is mounted to a front end of the auxiliary drawer 440.

The sliding guide 444 protrudes outwardly with a predetermined width so that the auxiliary drawer 440 does not sag when the auxiliary drawer 440 is withdrawn / inserted.

On the other hand, the auxiliary drawer 440 is mounted to the guide rail 460. The guide rails 460 guide the sliding of the auxiliary drawer 440 and are installed on the left and right sides of the main body 100 of the refrigerator, and more specifically, on the upper left and right sides of the drawer chamber 300.                     

The guide rail 460 is formed in a long horizontal rectangular plate shape, the center portion of the guide rail 460 is formed long recessed along the transverse direction of the guide rail 460 so that the second cloud member 442 is It is formed to be able to make a cloud movement from the inside.

Hereinafter, the operation of the refrigerator according to the present invention having the configuration as described above will be described with reference to the drawings.

FIG. 9 is a schematic view showing a cold draw structure of a double drawer employing a preferred embodiment of a refrigerator according to the present invention. As shown in the drawing, the cold air generated by a refrigeration cycle may be used as the cold air supply device 380. It is supplied through the inside of the refrigerator. The cold air supply device 380 is formed at an upper portion in the center of the rear side of the drawer chamber 300 to supply cold air to the front and the lower side of the drawer chamber 300.

As a result, cold air is supplied to a plurality of storage spaces such as the storage box 340 and the drawer drawer 420 provided inside the drawer chamber 300 to freeze or refrigerate the foods stored in the respective storage spaces.

The cold air discharged from the cold air supply device 380 passes through a rear surface of which the upper one side of the auxiliary drawer 440 in which the drawer drawer 420 is accommodated is opened and is transferred to the rear of the drawer drawer 420.

The cold air reaching the rear of the drawer drawer 420 flows into the drawer drawer 420 through the cold drawer inlet 424, and is relatively close to the cold drawer 380. Strong cold air flows quickly into the cold air, and weak cold air flows into the cold air inlet 424 on the right side with a relatively slow flow rate.

The cold air inlets 424 formed on the left side of the rear side of the drawer drawer 420 are formed to be somewhat wider, and the cold air inlets 424 formed on the right side of the drawer drawer 420 are formed relatively densely and thus the plurality of cold air inlets 424. The total amount of cold air flowing in through) is evenly introduced, and the cold air flows to a place relatively far from the cold air supply device 380.

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

For example, in the exemplary embodiment of the present invention, the drawer drawer 420 is formed in one configuration of the double drawer 400 and is mounted in the drawer chamber 300, but, if necessary, various inside of the refrigerator main body 100. It may be possible to be formed at a location, or to be installed alone.

In the refrigerator according to the present invention as described above in detail, a plurality of cold air inlets having the same size are formed on the rear surface of the drawer drawer in which food is stored away from the cold air supply device.

Therefore, the cold air introduced into the drawer drawer can be evenly introduced into the entire inside of the drawer drawer, it is possible to prevent the food stored in the drawer drawer locally frozen or refrigerated.                     

In addition, the supply of sufficient cold air even far away from the cold air supply device can be stored in the desired state of the food stored inside the drawer drawer has the effect of improving the storage performance of the refrigerator.

Claims (11)

delete delete delete A body forming a storage space; A cold air supply device provided on a rear wall surface of the storage space and discharging cold air to a high inner side; A drawer drawer provided at a front of the storage space to be withdrawable forward; An auxiliary drawer having a bottom, left and right both sides, and a back side to accommodate the drawer drawer inside; A withdrawal rail recessed in both left and right sides of the auxiliary drawer and guiding forward and backward movement of the withdrawal drawer; It is provided on both sides of the storage space, the guide rail for guiding the front and rear sliding movement of the drawer drawer; At least one of the cold air outlet of the cold air supply device is formed in a position facing the rear of the drawer drawer, The rear side of the drawer drawer is formed with a plurality of cold air inlet opening to guide the cold air discharged from the cold air supply device is introduced into the drawer drawer, The rear of the auxiliary drawer is characterized in that the refrigerator is formed to extend to a lower position than the upper end of the cold air inlet. The method of claim 4, wherein The plurality of cold air inlet is formed in the same size, The refrigerator is characterized in that the gap is formed closer to the position away from the discharge port of the cold air supply device. The method of claim 4, wherein The cold air inlets are formed at equal intervals, Refrigerator, characterized in that the size is larger as the distance away from the discharge port of the cold air supply device. The method of claim 4, wherein The plurality of cold air inlet is formed to be inclined toward the inner side to form a guide plate for guiding the flow of cold air, The guide plate is a refrigerator, characterized in that the inclination is larger as the distance from the discharge port of the cold air supply device closer. The method of claim 4, wherein Between the plurality of cold air inlet is formed to be twisted to have an inclined surface to form a connection for guiding the flow of cold air, And the connection part is formed such that the inclination increases as the distance from the discharge port of the cold air supply device increases. The method of claim 4, wherein The plurality of cold air inlet, Refrigerator, characterized in that the size is closer to the larger side and the farther away from the cold air supply device is smaller in size. The method of claim 4, wherein The plurality of cold air inlet, It is formed in the same size and space, the refrigerator characterized in that formed on the one side end of each cold air inlet protruding to have a predetermined inclination to guide the inflow direction of the cold air is formed. The method of claim 4, wherein The plurality of cold air inlet, It is formed in the same size and intervals, the refrigerator is characterized in that the connection portion between each cold air inlet is twisted to have a predetermined angle to adjust the inflow direction of the cold air.

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