KR0160419B1 - Cool air duct of a refrigerator - Google Patents

Abstract

The present invention provides a cold air duct of a refrigerator configured to allow a proper amount of cold air to be discharged into the refrigerating chamber through a plurality of cold air discharging outlets, and to enable a smooth circulation of the cold air in the refrigerating chamber.

The cold air duct according to the present invention has a plurality of first and second flow paths for guiding the incoming cold air to both sides of the discharge ports, and a plurality of cold air ducts disposed above and below each of the cold air discharge ports to guide the cold air flowing through these flow paths to each cold air discharge port. The cold air induction portion of the.

Each cold air induction part has protruding jaws extending upwardly toward the first and second flow paths. Due to these protruding jaws, the cold air can flow into the refrigerating chamber without colliding with each discharge port from both sides.

In addition, since the protrusions of the cold air induction portion located on the lower side than the upper cold air inflow portion extend slightly to the cold air flow path side, a little more amount of cold air may flow into the cold air outlet on the lower side than the cold air outlet on the upper side, so that the uniformity in the refrigerating chamber can be obtained. Cooling can be performed.

Description

Cold duct of the refrigerator

1 is a cross-sectional view showing the structure of a typical refrigerator.

2 is a view showing the inside of a conventional canister discharge type refrigerator.

3 is a view showing the inside of a conventional three-dimensional cooling method of the refrigerator.

Figure 4 is an overall cross-sectional view schematically showing the structure of a refrigerator according to the present invention.

5 is a view showing the inside of the refrigerator compartment in a refrigerator door according to the present invention in a state where the refrigerator compartment door is opened.

6 is an exploded perspective view showing a housing including a cold air duct in the refrigerator according to the present invention.

7 and 8 are front and side views of the housing shown in FIG.

Figure 9a is a perspective view of the cold air duct according to the present invention, showing the arrangement relationship between the cold air flow path and the cold air discharge port.

Figure 9b is a front view of the cold air duct according to the present invention, showing the flow of cold air flowing from the cold air flow path to the cold air discharge port.

10 and 11 are cross-sectional views showing a modification of the cold air duct according to the present invention, showing the arrangement relationship between the cold air flow path and the cold air discharge port.

12 to 14 show a modification of the housing to which the cold air duct according to the present invention is applied.

* Explanation of symbols for main parts of the drawings

16: cold air outlet 17: housing

18: cold air inlet 25: cold air duct

26: rotor blade 35, 36: the first and second euro

37, 38: first and second connection path 370: cold air induction part

The present invention relates to a refrigerator having a cold air duct for efficiently guiding cold air to a plurality of cold air discharge ports. More specifically, the cold air passed through a cooler by a plurality of cold air induction parts protruding from a cold air duct surface to form a cold air flow path. It relates to the cold air duct of the refrigerator to properly distribute to each cold air outlet.

Generally, a refrigerator includes a freezer compartment 6 and a refrigerator compartment door in a refrigerator body 4 having a heat insulation structure forming a freezer compartment 2 and a refrigerator compartment 3 partitioned by an intermediate partition 1 as shown in FIG. 1. (7) is installed and configured. The compressor 11 is installed in the machine chamber 11M below the refrigerating chamber 3, and the condenser and pressure reducer, not shown, are embedded in the main body 4 or installed in the machine chamber 11M, and the cooler 12 is mounted on the rear wall of the freezing chamber 2. Installed to be connected by a refrigerant pipe not shown to perform the refrigeration cycle. A cooling fan 13 is installed above the cooler 12 to forcibly blow cold air generated in the cooler 12 to the freezing chamber 2 and the refrigerating chamber 3. In order to guide the supply of cold air, a fan guide 14 is disposed in front of the cooling fan 13, and a cold air duct 15A is provided on the rear wall of the refrigerating chamber 3. Reference numeral 19 denotes an adjustment damper for adjusting the amount of cold air supplied to the refrigerating compartment 3, and reference numeral 8 denotes a shelf for placing food.

In the conventional refrigerator, a cancan discharge method is generally employed as a method of supplying cold air to a refrigerating chamber. As shown in FIG. 2, the cold air discharge ports 16A, B, and C are provided in the cold air duct 15A provided on the rear wall of the refrigerating compartment 3 so as to correspond to the divided zones partitioned by the respective shelves 8. Are arranged up and down, and the cold air is discharged to each divided section formed by the plurality of shelves 8.

However, in the Kankan discharge type refrigerator, since the cold air discharge ports 16 are formed perpendicular to the flow direction of the cold air flowing in the cold air duct 15A, the cold air discharge ports 16A formed on the upper side of the cold air duct 15A. In the furnace, most of the cold air is lowered and collected at the lower side of the cold air duct 15A without a sufficient amount of cold air being discharged, thereby discharging more cold air than the cold air outlet 16C at the lower side. Therefore, the upper and lower portions of the refrigerating chamber 3 maintain different temperature ranges, thereby preventing uniform cooling. In addition, the food stored in the lower portion of the refrigerating chamber (3) is supercooled, while the food stored in the upper portion does not maintain an appropriate storage temperature, there is a problem that can not be stored fresh food.

Further, due to the cold air duct structure as described above, the cold air is discharged only from the cold air discharge port 16 toward the front direction of the refrigerating chamber 3. Therefore, the cold air circulation in the refrigerating chamber 3 is not smooth, so that the cold air does not reach the corner portions of the refrigerating chamber 3.

In addition, when a bulky food container is placed in front of the cold air discharge port 16, the circulation of the cold air does not proceed smoothly.

Therefore, there is a problem in that the food in the refrigerator can not be stored in an optimal state by forming a temperature deviation in the left and right directions and the front and rear directions of the refrigerating chamber 3.

In recent years, in order to make the temperature distribution in a refrigerator uniform, the refrigerator of the three-dimensional cooling system as shown in FIG. 3 was developed. In the conventional refrigerator, a plurality of cold air discharge ports 16S are formed on both side walls of the refrigerating chamber 3 together with the cold air discharge ports 16 provided on the rear wall of the refrigerating chamber 3 to discharge cold air from three surfaces.

However, even in the same refrigerator, cold air is merely discharged in one direction toward the inside of the refrigerator and is not distributed in various directions. Therefore, depending on the size and arrangement of the food, there is a portion that is exposed to cold and not so that the uniform cooling of the food is not achieved.

In addition, since the cold air duct structure of the refrigerator is the same as the above-described Kankan discharge type refrigerator, sufficient cold air does not pass through the upper discharge port, whereas more cold air passes through the lower discharge port. Therefore, the disadvantage of failing to keep the food stored in the refrigerating compartment fresh at a uniform temperature even by the refrigerator having the three-discharge outlet is not improved.

An object of the present invention is to provide a refrigerator in which the entire space of the refrigerating chamber can be maintained at a uniform temperature by discharging an appropriate amount of cold air through each cold air discharge port formed in the cold air duct in the vertical direction.

Still another object of the present invention is to provide a refrigerator in which cold air is discharged in opposite directions through both sides of the cold air discharge ports so as to smoothly circulate the cold air in the refrigerating compartment.

The refrigerator to which the present invention is applied includes a freezer compartment and a refrigerating compartment which are mutually divided by an intermediate wall, a cooler for generating cold air, a fan for circulating the generated cold to the freezer compartment and a refrigerating compartment, and a rear wall of the refrigerating compartment. It is provided with a cold air duct to guide the cold air to the refrigerating chamber.

The cold air duct forming a characteristic part of the present invention includes a cold air inlet formed in an upper portion of the cold air duct to introduce cold air passing through the cooler into the cold air duct, and a center of the cold air duct for supplying cold air to the refrigerating chamber. A plurality of cold air outlets formed in up and down directions, first and second cold air passages extending downwardly from the cold air inlet, and formed on both sides of the cold air outlets, and protruding from upper and lower portions of each of the cold air outlets; And a plurality of cold air induction parts that separate the second cold air flow paths from each other and distribute cold air flowing downward through the cold air flow paths to the respective cold air discharge outlets.

A pair of protruding jaws extending upwardly inclined toward the first and second cold air passages are formed on both upper ends of each of the cold air induction parts, and curved parts that are smoothly curved toward the cold air discharge ports are formed on both lower ends of the cold air induction parts. First and second connection paths are formed at both sides of the cold air discharge port by the curved part of the cold air induction part and the protruding jaw of another cold air induction part adjacent thereto.

Any one of the pair of protruding jaws formed at the upper end of the cold air induction part extends from the lower end of the cold air discharge port to the middle part, and the pair of curved parts formed at the lower end of the other cold air induction part located at the upper part of the cold air induction part. The curved portion located on the opposite side of the protruding jaw of the extending from the upper end of the cold air discharge port to the middle portion.

The cold air discharge ports form first and second cold air discharge ports that separate the discharge ports into upper and lower portions by the protruding jaw and the curved portion, and the first and second connection passages respectively form the first and second connection paths. It is connected to the cold air discharge part.

By the above structure, the cold air introduced into the first and second connection paths through the first and second cold air passages may be discharged toward both sides of the refrigerating chamber through the cold air discharge ports without colliding with each other.

The pair of protruding jaws extends slightly longer toward the first and second cold air passages as they are formed at the lower portion of the cold air induction portion, and the inlet portions of the first and second connection passages are located at the cold air discharge ports located at the lower side. As it is formed, it is made slightly wider, so that the cold air flowing through the first and second cold air flow passages is discharged more to the cold air discharge ports located below the upper side than the upper side.

In addition, the first and second connection passages connected to one cold air outlet at different heights may extend the protruding jaws and curved surfaces of the cold air outlet and the other cold air outlets adjacent to the cold air outlets so that their upper and lower positions are changed. The part is formed in the opposite position.

Due to the above structure, the lower cold air outlet through which cold air of relatively high temperature is discharged passes a larger amount of cold air than the upper cold air outlet through which cold air of relatively low temperature is discharged, so that the entire space of the refrigerating chamber is uniform. Will be able to maintain.

A limiting jaw is formed between the pair of protruding jaws of the cold air induction part located at the lowermost side and the first and second cold air flow paths to constantly limit the amount of cold air passing through the flow paths.

As another structure of the cold air duct according to the present invention, by forming a plurality of cold air flow passages which are branched separately from the cold air inlet and connected to both sides of each cold air outlet without mutual communication, the cold air passing through the cooler can be effectively discharged to the refrigerating compartment. have.

The structure and operation of the present invention will be disclosed more clearly and in detail in the following embodiments described with reference to the accompanying drawings.

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

4 is an overall side sectional view of a refrigerator according to the present invention. As shown in the drawing, the refrigerator according to the present invention includes a freezing compartment door 6 and a refrigerating compartment door in a refrigerator body 4 having an insulation structure forming a freezing compartment 2 and a refrigerating compartment 3 partitioned by an intermediate partition 1. (7) is installed and configured. In the refrigerating compartment 3, a plurality of shelves 8 for placing foods are installed. A third chamber 9 for storing specific foods at a specific temperature range is formed above the refrigerating compartment 3, and On the lower side, the vegetable compartment 10 is formed with the refrigerator compartment 3. The compressor 11 is installed in the machine room 11M below the refrigerating compartment 3, the condenser and the pressure reducer (not shown) are embedded in the main body 4 or installed in the machine room 11M, and the cooler 12 is the freezer compartment 2 It is installed on the rear wall of them to be connected by the refrigerant pipe to perform the refrigeration cycle.

A cooling fan 13 is installed above the cooler 12 to forcibly blow cold air generated in the cooler 12 to the freezing chamber 2 and the refrigerating chamber 3. In order to guide the supply of cold air, a fan guide 14 is disposed in front of the cooling fan 13, and a housing 17 having a cold air flow path and a discharge port, which will be described later, is installed on the rear wall 3W of the refrigerating chamber 3. do. Therefore, the cold air passing through the cooler 12 is branched and supplied to the freezing chamber 2 and the refrigerating chamber 3. 5 is a concave groove formed in the rear wall of the refrigerating chamber 3 for installation of the housing 17.

As shown in FIG. 5, this housing 17 is installed in the center of the rear wall 3W of the refrigerating chamber 3, the upper part of which is located immediately after the third chamber 9, and the middle part and the lower part It is arrange | positioned so that it may be located immediately after the refrigerator compartment 3 between the 3rd chamber 9 and the vegetable compartment 10. As shown in FIG. That is, the upper end of the housing 17 is in contact with the intermediate partition wall 1 and the lower end is extended to be adjacent to the vegetable compartment 10 to have a height substantially equal to the height of the refrigerating compartment 3.

As shown in FIG. 6, the housing 17 is roughly divided into the front plate 24, the cold air duct 25 having a similar shape to be joined with the front plate 24, and the rear surface of the cold air duct 25. As shown in FIG. It consists of a sealing plate 34 to be bonded. The rotary blade 26 is detachably installed on the front plate 24, and a driving motor 28 for driving the rotary blade 26 is housed in the motor case 29 on the upper side of the rotary blade 26. It is provided in the upper side part of the board 24. The driving motor 28 is installed on both sides of the interior lamp 30, 31 is the interior lamp cover 31 for the protection of the interior lamp (30).

Reference numeral 32, which is not described in FIG. 6, is turned on and off by the operating projection 33 provided on the upper end of the rotary blade 26 as a position detecting switch for adjusting the rotary position of the rotary blade 26. And (27) is a grid-shaped discharge grille installed so that the rotary blade 26 can be inserted into the front plate 24 for protection. The discharge grill prevents the operation of the rotary blades 26 from being disturbed by the stored goods stored in the refrigerator.

As illustrated in FIGS. 7 and 8, a cold air inlet 18 is formed at an upper end of the cold air duct 25 of the housing 17 to guide the cold air generated by the cooler 12 to the refrigerating compartment 3. A damper baffle 19 for adjusting the amount of cold air supplied to the refrigerating chamber by opening and closing the cold air inlet 18 and a damper motor 20 for driving the damper baffle 19 are installed. Temperature control of the refrigerating chamber 3 using them is carried out in the same manner as in the prior art. Reference numeral 21 denotes a damper cover, which is integrally formed with the front plate 24 in the present embodiment, and reference numeral 22 denotes a spacer, which is constituted by an insulator. 23 formed in the damper cover 21 is a cold air discharge port for discharging the cold air passing through the cold air inlet 18 to the third chamber (9). As a result, the distance that the cold air moves from the cold air inlet 18 to the cold air outlet 23 is shorter than the distance of moving the cold air inlet 18 from the cold air inlet 18 to the middle part and the lower part of the housing 17. Maintain lower temperature than (3). In this embodiment, two cold air outlets 23 are arranged on both sides.

As shown in FIGS. 9A and 9B, the cold air duct 25 that features the present invention includes a cold air passage 15 and a discharge port for guiding the cold air generated in the cooler 12 to be supplied to the refrigerating chamber 3. 16A, B, C) are formed. The cold air flow passage 15 is formed in both sides of the cold air duct 25 in a lengthwise direction to bisect and guide the cold air passing through the cold air inlet 18, and the discharge ports 16A, B, and C are cold air passages 15. It is formed through the housing 17 to communicate with the refrigerating chamber (3). The discharge ports 16A, B, and C are arranged up and down in the center of the cold air duct 25, and the cold air passage 15 has a first flow path 35 formed on both sides with the discharge holes 16A, B, and C interposed therebetween. A second flow path 36 is included. At this time, the discharge ports 16A, B, and C are formed at each end of the refrigerating chamber 3 (that is, the space partitioned by the shelf 8), similarly to the wing portion 26a (see FIG. 7) of the rotary blade 26. Correspondingly arranged up and down, in this embodiment, each wing portion 26a of the rotary blade 26 is arranged in front of each discharge port 16. Therefore, there are three cold air outlets. As such, the cold air passage 15 is bisected into the first passage 35 and the second passage 36, and the outlets 16A, B, and C are formed at the center thereof, so that the overall thickness of the cold air duct 25 is increased. It is reduced. The reduction in the thickness of the cold air duct 25 prevents the cold air duct 25 from protruding into the air, thereby reducing the effective space in the air.

The upper end of the first flow path 35 and the second flow path 36 is formed to be located at both sides of the cold air inlet 18, and the lower end is formed long and vertically connected to the vegetable chamber (10). Therefore, the cold air passing through the cold air inlet 18 by the opening of the damper baffle 19 (FIG. 8) is distributed to the left and right and downward along the first flow path 35 and the second flow path 36. And it is discharged to the vegetable chamber 10, a part is discharged to the third chamber 9 through the cold air discharge port (23). In order to guide the downward cooling air to the refrigerating chamber (3), the cold air flow passage (15) is the first connection passage 37 and the second flow passage (36) and the discharge opening (16) connecting the first passage 35 and the discharge port (16). It includes a second connecting path 38 for connecting the). The first and second connection passages 37 and 38 are formed to protrude above and below each cold air outlet 16. It is formed by a plurality of cold air induction portion 370. Therefore, the cold air flowing along the first flow path 35 and the second flow path 36 is guided to the first connection paths 37A, B, and C and the second connection paths 38A, B, and C, respectively, to discharge holes 16A, It is discharged to the refrigerating chamber 3 through B and C).

Here, the first connection passage 37 and the second connection passage 38 have a wide inlet portion connected to the first and second flow passages 35 and 36, as shown in FIG. 9B, and an outlet portion connected to the discharge port 16. It is narrowly formed. Particularly, the lower side (37U) and 38U of the cold air induction portion 370 forming the inlet portion of the first connection path 37 and the second connection path 38 are rounded, and the upper side thereof is a locking step 371 and 372 ( By having the shape extended by 373 to the outer side (left and right side of FIG. 9A) slightly more than the upper side, a part of downward cold air is naturally guided to these connection paths 37 and 38. As shown in FIG. Therefore, a part of the downward cold air is smoothly guided to the connection paths 37 and 38 by the locking step 371, 372 and 373 along the rounding part.

Also, as shown, the lower side of the cold air induction part 370B forming the inlet portion of the intermediate first and second connection paths 37B and 38B rather than the upper first and second connection paths 37A and 38A. The rounded length of 37U (38U) is formed longer, and also of the cold air induction part 370C forming the inlet portion of the lower first and second connection paths 37C and 38C than in the middle first and second connection paths. It is more preferable that the rounded lengths of the lower sides 37U and 38U are formed longer and extend more outward than the lower locking jaw 372. It is discharged first, the cold air located in the lower side of the cold air flow path (15), the heat exchange is performed for a longer time with the surroundings, so the temperature of the cold air is higher, so that the amount of cool air toward the lower side of the connecting passages (37) (38) and the discharge port ( It is to reduce the temperature deviation according to the height of the refrigerating chamber by discharging it into the refrigerating chamber (3) through the 16). That is, more cold air is guided through the lower side connecting passages 37C and 38C than the middle side connecting passages 37B and 38B, rather than the upper side connecting passages 37A and 38A. By doing so, it is possible to realize uniform cooling by eliminating the temperature deviation in the chamber caused by the temperature difference depending on the discharge position.

In addition, the lower limit of the first passage 35 and the second passage 36, more precisely, the lower limit jaw 48 of a predetermined height is provided on the lower side of the first connection passage 37C and the second connection passage 38C. The amount of cold air supplied to the vegetable compartment 10 is reduced, and the amount of cold air discharged to the refrigerating compartment 3 through the discharge port 16 is increased. Therefore, the refrigerating chamber 3 is kept lower than the vegetable chamber 10.

Meanwhile, in order to disperse the cold air discharged to the refrigerating chamber 3 from side to side, the discharge port 16A is directly connected to the first discharge part 39A directly connected to the first connection path 37A and the second connection path 38A. A second discharge portion 40A is included. They are preferably in communication with each other, but the discharge port 16 is formed to be divided into two upper and lower portions so that cold air flowing from the first and second flow paths 35 and 36 do not face each other. That is, the left side of the lower end of the cold air induction part 370A extends from the upper end of the discharge port 16A to the middle, and the right protruding jaw 371 of the cold air induction part 370B extends from the lower end of the discharge port 16A to the middle, thereby making it the first. The discharge portion 39A is eccentrically toward the first connection passage 37A, and the second discharge portion 40A is eccentrically toward the second connection passage 38A so that the cold air guided from each of the cold air flow passages 35 and 36 is discharged. When passing through 16A, they do not bump into each other and naturally disperse in opposite directions toward the inside of the refrigerating chamber 3. For example, the cold air guided to the first discharge unit 39A is discharged toward the left side, and the cold air guided to the second discharge unit 40A is discharged toward the right side so that the discharged cold air is naturally dispersed without frontal collision with each other. The line XX indicated at the discharge port 16A in FIG. 9B represents the center line of the discharge port 16A, the line YY represents the center line of the first discharge unit 39A, and the line ZZ represents the center line of the second discharge unit 40A. . That is, it can be seen that the first discharge portion 39A is eccentric to the right and the second discharge portion 40A to the left. In addition, it is preferable that the positions of the first discharge portion 39b and the second discharge portion 40B of the discharge port 16B adjacent to the upper discharge port 16A are opposite. That is, when the first discharge portion 39A is positioned above the second discharge portion 40A at the upper discharge port 16A, the second discharge portion 40B is opposite to the first discharge portion 39B at the intermediate discharge port 16B. It is located above. This is discharged first from the cold air inlet 18, the cold air located on the lower side of the cold air flow path 15 is higher than the cold air located on the upper side, so that the right side connection path than the left side connection passage 38A at the upper discharge port 16A. The temperature of the cold air flowing in from 37A becomes lower, and in the middle discharge port 16B, the cold air of lower temperature flows in from the left connection path 38B than the right connection path 37B, and in the lower discharge port 16C. It is because uniform cooling can be realized by allowing cold air of a lower temperature to flow from the right connection passage 37C than the left connection passage 38C again, and eliminating the left and right temperature variations in the refrigerator.

Referring to the operation of the refrigerator according to the present invention configured as described above are as follows.

First, when the compressor 11 is operated, the cooler 12 generates cold air by heat exchange with the surroundings. The cold air thus produced is supplied to the freezing compartment 2 and the refrigerating compartment 3 as indicated by the arrows in FIG. 4 by the operation of the cooling fan 13. At this time, the opening and closing operation of the damper baffle 19 (FIG. 8) is controlled according to the temperature of the refrigerating chamber 3, and when the damper baffle 19 is opened, cold air passes through the cold air inlet 18 (FIG. 9). It is supplied to the refrigerating chamber (3), the cold air passing through the cold air inlet 18 is distributed to the left and right and discharged downward along the first passage 35 and the second passage 36 to the refrigerating chamber (3) and the vegetable chamber (10). And some are discharged to the third chamber 9 through the cold air discharge port 23 (FIG. 5).

The discharge process of the cold air into the refrigerating chamber 3 will be described in more detail. In FIG. 9A and FIG. 9B, the cold air flowing along the first flow path 35 and the second flow path 36 is sequentially connected to the first connection path 37. ) And the second connection path 38 are discharged to the refrigerating chamber 3 through the discharge port 16.

That is, as described above, the discharge port 16 includes a first discharge portion 39 and the second discharge portion 40, which are in communication with each other and formed to be separated up and down, each discharge portion 39 (40) The cold air guided by) is discharged toward the opposite directions, thereby naturally dispersing in the refrigerating chamber 3. For example, if the cold air guided to the first discharge portion 39A is directed toward the left side of FIG. 9A, the cold air guided to the second discharge portion 40A is directed to the right side of FIG. 9A, and the discharged cold air is naturally dispersed. will be. In addition, the upper and lower arrangements of the first discharge portion 39b and the second discharge portion 40B of the upper discharge port 16A and the discharge port 16B adjacent to each other are reversed, and the lower discharge port 16C adjacent to the intermediate discharge port 16B is adjacent. Since the up and down arrangement of the first and second discharge portions 39C and 40C is reversed, the upper discharge port 16A allows cool air of a lower temperature to flow from the right side than the left side, and the right side at the intermediate discharge port 16B. Cold air of lower temperature is introduced from the left side, and cold air of lower temperature is introduced from the lower discharge port 16C again on the right side than the left side, and the right and left uniform cooling can be realized by eliminating the left and right temperature deviations in the air. have.

Also. The middle locking jaw 372 extends slightly outwardly than the upper locking jaw 371, and the lower locking jaw 373 extends slightly outwardly than the middle locking jaw 372. Therefore, although the cold air temperature is higher at the lower side than the upper side of the cold air passage 15, the amount of cold air is increased toward the intermediate side and the lower side to the connecting passages 37B, 38B and 37C, 38C, and the discharge port 16B and By discharging to the inside of the refrigerating chamber 3 through 16C, it is possible to reduce the temperature deviation according to the height of the refrigerating chamber and to realize uniform cooling of the upper and lower sides.

10 and 11 illustrate other embodiments of the present invention. As illustrated in detail in the first embodiment, the cold air duct 25A shown in FIG. 10 passes through the cold air inlet 18a by a plurality of cold air induction parts 370A ', B', C ', and D'. The cold air is divided into two and discharged to each of the cold air discharge ports 16A ', B', and C '.

In the first embodiment, the cold air duct 25A is not rounded at the bottom of each cold air induction part, and a limiting jaw is not provided between the lowest cold air induction part 370D 'and each of the cold air flow paths 35A and 36A. Different from the cold air duct 25 according to the above, other than the cold air duct 25 of the first embodiment, so that further description is omitted.

The cold air duct 25b shown in FIG. 11 does not have the common cold air flow path which connects each cold air discharge port 16A ", B", C "from the cold air inlet 18b. On the other hand, the first flow path 360 connecting the upper cold air outlet 16A '' and the cold air inlet 18B, and the second flow path connecting the middle cold air outlet 16B '' and the cold air inlet 18B ( 361 and the 3rd flow path 362 connecting the lower cold air discharge port 16C '' and the cold air inlet 18B are arranged independently of each other. Of course, the object and effect to be performed in the present invention can be obtained by the above structure.

12 to 14 show housings of various structures to which the cold air ducts of the present invention can be applied.

In the housing 17 shown in FIG. 12, a discharge grill 27 is disposed on the front surface of the lower cover 42, and a twisting rotary blade 26 is installed therebetween. The upper cover 41, on which the cooler 12 is installed, is disposed on the lower cover 42, and a cold air inlet 18 communicating with the lower cover 42 is formed at one end thereof. The cooling fan 13 is installed directly below the cold air inlet 18, that is, at the upper end of the lower cover 42. In the housing 17 having the above structure, when the cold air duct 25 according to the present invention is installed on the rear wall of the lower cover 42, the cold air passing through the cooler 12 is the cold air duct 25 of the present invention. It is efficiently guided by and discharged to the refrigerating chamber (3) through the discharge grill (27). Therefore, the object and effect according to the present invention can be obtained.

The housing 17 of FIG. 13 is similar to the housing of FIG. 12, in which the cooler 12 and the cooling fan 13 are disposed under the lower cover 42, and the refrigerating chamber 3 is provided in the upper cover 41. Cold air discharge ports 50 for discharging cold air from the upper portion to the lower portion are formed.

If the cold air duct 25 of the present invention is installed in the housing 17 having the structure as described above, the object and the effect according to the present invention will be obtained.

In addition, the same effect can be obtained by providing the cold air duct 25 of this invention also in the housing 17 as shown in FIG. That is, when the cold air duct 25 of the present invention is installed at the rear of the ellipsoidal polygonal rotary wing 26, the cold air passing through the cooler (not shown) is efficiently guided through the cold air duct 25 of the present invention. After being discharged to the refrigerating chamber (3) through the discharge grill 27 located on the front of the rotary wing (26).

As described in detail above, according to the cold air duct according to the present invention, the cold air is divided along the cold air flow paths on both sides, and is distributed in an appropriate amount to each cold air outlet, and a larger amount of cold air is provided to the cold air outlet on the lower side than the cold air outlet on the upper side. Since it can be discharged, uniform cooling can be performed in the vertical direction of the refrigerating chamber.

In addition, since the cold air guided to both sides of the cold air outlet is discharged to the refrigerating chamber in layers in the up and down direction, the cold air circulation is smoothly distributed in the left and right directions of the refrigerating chamber without the flow loss caused by the collision of the two cold air. .

Therefore, even if a bulky food is placed near the cold air outlet, the cold air circulation has a secondary advantage that can be achieved without any problem.

In addition, since the thickness of the cold air duct can be significantly reduced by the cold air duct structure as described above, it is possible to prevent the reduction of the effective space of the refrigerating chamber due to the installation of the cold air duct.

Claims (6)

The freezer compartment 2 and the refrigerating compartment 3 which are mutually partitioned by the intermediate wall 1, the cooler 12 which generate | occur | produce cold air, and the fan 13 for circulating the generated cold air to the said freezer compartment 2 and the refrigerating compartment 3 And a refrigerator provided on the rear wall of the refrigerating compartment 3 and having a cold air duct 25 for guiding the cold air to the refrigerating compartment 3, wherein the cold air duct 25 passes through the cooler 12. A cold air inlet 18 formed in an upper portion of the cold air duct 25 for introducing cold air into the cold air duct 25; A plurality of cold air discharge ports 16A, 16B, and 16C formed in a vertical direction at the center of the cold air duct 25 to supply cold air to the refrigerating chamber 3; First and second cold air passages 35 and 36 extending downwardly from the cold air inlet 18 and formed on both sides of the cold air outlets 16A, 16B, and 16C; Protruding above and below each of the cold air discharge ports 16A, 16B, and 16C to separate the first and second cold air passages 35 and 36 from each other, and to flow cold air downward through the cold air passages 35 and 36. The cold air duct of the refrigerator, characterized in that consisting of a plurality of cold air induction units (370A, 370B. 370C, 370D) distributed to each of the cold air discharge ports (16A, 16B, 16C). According to claim 1, wherein a pair of protruding jaws (371, 372, 373) inclined upward toward the first and second cold air passages (35, 36) on both sides of the upper end of each of the cold air induction portion (370B.370C, 370D) And curved portions 37U and 38U which are smoothly curved toward the cold air discharge ports 16A, 16B and 16C at lower ends thereof, so that the curved portions of the respective cold air induction portions and the protruding jaws of the lower cold air induction portions adjacent thereto are formed. Cold air duct of the refrigerator characterized in that the first and second connection paths (37A, 38A) (37B, 38B) (37C, 38C) are formed on both sides of each of the cold air discharge port. 3. The method of claim 2, wherein any one of the pair of protruding jaws 371, 372, and 373 formed at the upper end of the cold air induction parts 370B, 370C, and 370D has an intermediate portion from a lower end of the cold air discharge ports 16A, 16B, and 16C. Extends to the lower portion of the pair of curved portions 37U and 38U formed at the lower end of the other cold air induction portion located at the upper portion of the cold air induction portion, and the curved portion located at the opposite side of the extended projection jaw from the upper end of the cold air discharge port. Extending to the first and second connection paths 37A, 38A, 37B, 38B, 37C, 38C by the elongated protruding jaw and the curved portion, the cold air outlets 16A, 16B, Cold air duct of the refrigerator, characterized in that connected to (16C). 3. The method of claim 2, wherein the pair of protruding jaws 371, 372, and 373 extend slightly longer toward the first and second cold air passages 35 and 36 as formed in the lower portion of the cold air induction portion. The inlets of the first and second connection passages 37A, 38A, 37B, 38B, 37C, 38C are made slightly wider as they are formed at the cold air outlet located at the lower side, so that the first and second cold air passages ( 35, 36) The cold air duct of the refrigerator, characterized in that more air discharged to the outlet air outlet located on the lower side than the upper side. The first and second connection paths (37A, 38A) (37B, 38B) (37C, 38C) connected to one cold air outlet at different heights have their upper and lower positions at neighboring cold air outlets. The cold air duct of the refrigerator, characterized in that the elongated protruding jaw and the curved portion at the other side of the cold air discharge port adjacent to the cold air discharge port is formed in the opposite position. 3. The flow path of claim 2, wherein the restricting jaw 48 is formed between the pair of protruding jaws 373 of the cold air induction part 370D located at the lowermost side and the first and second cold air flow paths 35 and 36. A cold air duct of a refrigerator, characterized by a constant limitation on the amount of cold air passing through the (35, 36).