MXPA02008758A - Duct structure for refrigerator. - Google Patents

Abstract

The present invention refers to a duct structure for refrigerator, which is characterized in that it comprises an insulating layer 105 placed between outer and inner housings 101 and 102, the same forming outer and inner surfaces of the refrigerator 100 respectively. A duct body 120 having a cold air path therein is assembled to the rear portion of the inner housing 102, where the insulating layer is located 105. The duct body 120 vertically extends along the inner housing 102 and presents a side thereof which is opened and facing said inner housing 102, both edges of said side include flanges 124 arranged in a longitudinal manner. The flanges 124 are portions that come into close contact with the rear portion of the inner housing 102, said both edges of the opened side or the portion of the duct body 120 are formed by means of fastening protrusions 126. The inner housing 102 is provided with a coupling orifice 103 that is perforated in order to allow a refrigerating chamber 107 and t he cold air path 122 to be in contact therebetween through the opened side of the duct body 120. The invention further includes a cover plate 130 that is attached to the duct body 120 by means of the coupling orifice 103 facing the inner housing 102; the rear portion of the cover plate includes coupling elastic ribs 134 and elastic arms 135, the same protruding from the tip portion of the ribs 134 to the rear portion of the cover plate 130 respectively; the tip portions of the elastic arms 135 are formed by a plurality of channeled slots 136 respectively.

Description

CONDUIT STRUCTURE FOR REFRIGERATOR BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a refrigerator, and more particularly to a duct structure provided on a wall surface of the storage space of a refrigerator for transferring cold air into the storage space.

DESCRIPTION OF THE PREVIOUS TECHNIQUE Figure 1 is a sectional view showing the internal constitution of a conventional refrigerator. As can be seen in the figure, an outer housing 2 forms an outer surface of the refrigerator, while an inner housing 3 forms an interior surface of the refrigerator. An insulating material is filled between the outer and inner housings 2, 3 to form an insulating layer 5. An interior space of a cooler body 1, whose inner surface is formed by the inner housing 3, is divided into freezing and cooling chambers. cooling 9, 10 by a barrier 7. Each of the freezing and cooling chambers 9, 10 is maintained at a predetermined temperature and contains items for storage. Below the cooling chamber 10, a machine compartment 11 is provided in which several components are installed to perform a heat exchange cycle. The freezing and cooling chambers 9, 10 are open at the front sides thereof, which are selectively opened and closed by port 12, 12 ', respectively. For reference, an inner surface of the door 12 'for the cooling chamber 10 can be formed with a duct for supplying cold air to the interior of the cooling chamber 10. A rear side inside the freezing chamber 9 is formed with a chamber of heat exchange 14, and an evaporator 16 for generating cold air is installed inside the heat exchange chamber 14. The cold air generated from the evaporator 16 is supplied to the freezing and cooling chambers 9, 10 through several trajectories. A cold air supply conduit 19 for supplying cold air to the cooling chamber 10 is installed on the rear side inside the cooling chamber 10. Furthermore, a side wall of the cooling chamber 10 is provided with a side duct 20 for receiving the cold air through the cold air passage 18 which is formed inside the barrier 7, and then supplying the cold air inside the cooling chamber 10. Figure 2 shows a sectional structure of the duct lateral 20. As can be seen in the figure, the lateral conduit 20 is mainly composed of a conduit body 22 and a cover plate 27. The lateral conduit 20 is installed so that it is vertically elongated in the side wall of the chamber cooling 10. Accordingly, the conduit body 22 is formed to be vertically elongated, and a cold air flow path 23, one side of which corresponds to a hole coupling ring 31 formed in the side wall, is open and is provided in the conduit body 22. Both ends of a portion in which the cold air flow path 23 of the conduit body 22 is open, are formed with vertically elongated tabs 24 in contact with the rear side of the lower housing 3, and holding protrusions 25 projecting to face each other from a position adjacent to the portions in which the tabs 24 are formed. The cover plate 27 is engaged with the body of the duct 22 on a front side of the inner housing 3 to cover the open portion of the cold air flow path 23. The cover plate 27 is formed with a plurality of cold air discharge holes 28. coupling 29 are formed so that they protrude from the rear side of the cover plate 27 so that they can be secured to the fastening protuberances 25 of the body. or the conduit 22. The lateral conduit 20 constructed as such, is installed in such a way that the conduit body 22 is placed on the rear side of the inner housing 3 and the cover plate 27 is then fastened to the conduit body 22 by means of of the coupling hole 3h which is on the front side of the inner housing 3, before forming the insulating layer 5.

However, the aforementioned prior art has the following problems: First, the conduit body 22 and the cover plate 27 are fastened to each other only by means of the coupling hooks 29 and the holding protuberances 25. However, Due to the manufacturing and assembly tolerance of the conduit body 22 and the cover plate 27, a problem can be generated because the flanges 24 are not firmly sealed to the rear side of the inner housing 3. In such case, with the formation of the insulating layer 5, a foam can be introduced into the cold air flow path 23 between the flanges 24 and the rear side of the inner housing 3. To avoid this problem, the flanges 24 and the inner housing 3 have been conventionally bonded one to the other by means of an adhesive tape. However, the problem remains that working to adhere the tape to the back side of the inner housing 3 is very problematic. Meanwhile, the inner surface of the door 12 'for the cooling chamber 10 is also substantially constructed as a wall surface of the cooling chamber 10. As can be seen in figure 3, it can also be provided with a duct d door to supply cold air inside the cooling chamber. That is, an insulator layer 12h is also formed between an outer housing 12a and an inner housing 2b of the door 12 '.

A transverse protuberance 32 is formed in the inner housing 12b, that is, an inner surface forming the wall surface of the cooling chamber 10. As the transverse protrusion 32 is formed in such a way that it protrudes from the inner housing 12b, in As a result, a groove 32"is formed on the rear side of the inner housing 12 B. Here, the transverse protrusion 32 is constructed to form or support a door basket provided on the door 12. A grid plate 33 connects to the protrusion transverse 32 and is inclined with respect to the inner housing 12b A plurality of discharge 33h are drilled in the grid plate 23. On the rear side of the inner housing 12b of the door, there is a space to form a cold air flow path 38 defined by the transverse protuberance 32 and the grid surface 33. For this purpose, a first insulating member 34 is installed with an end or the same fitted in a slot 32 'of the transverse protrusion 32, and a second isolation member 35 is installed to define the cold air flow path 38 in cooperation with the first insulation member 34 and the grid plate 33. The first and second insulating members 34, 35 are fixed to the rear side of the inner housing 32b with a tape 36. However, when a door conduit 30 constructed in this way is installed in the door 12 ', the door 12' its thickness increases with the thickness of the insulation members 34, 35, and in this way the refrigerator becomes bulky. However, there is a problem that it is complicated to manufacture a door conduit 30 since the belt 38 must be applied to the rear side of the inner housing 12b to fix the insulation members 34, 35 in the inner housing 12b.

BRIEF DESCRIPTION OF THE INVENTION Therefore, it is contemplated that the present invention will solve the above problems of the prior art. An object of the present invention is to allow a conduit for supplying cold air to be more accurately installed in a wall of the storage space of a refrigerator. Another objective of the present invention is to allow a conduit to be easily assembled in a wall of the storage space of a refrigerator. A further objective of the present invention is to produce a total thickness of a wall of a storage space of a refrigerator, in which a duct can be installed. In accordance with one aspect of the present invention to achieve the objectives, a conduit structure for a refrigerator including a refrigerator body is provided in which an insulating layer is formed between the outer and inner housing thereof, and a storage space is provided, comprising: a conduit body formed for being elongated in one direction, and including tabs that come into contact with the rear side of the inner housing forming an interior surface of the storage space, and a cold air flow path formed therein; a cover plate attached to the conduit body at the front of the inner housing formed with a coupling hole, which communicates with the cold air flow path of the conduit body through the coupling hole to protect the flow path of cold air, and which is formed with a plurality of cold air discharge holes communicating with the cold air flow path and with the storage space; fastening protuberances formed inside the conduit body corresponding to the rear side of the inner housing; and elastically engageable ribs which are formed on the back side of the cover plate, each includes a plurality of grooved grooves within which each of the fastening protrusions selectively settle, and have an elasticity to elastically deform with the fastener of the ribs in the clamping protuberances. A whole surface of the duct body corresponding to the rear side of the inner housing is formed in such a way that it is open, and the gripping protrusions are formed so as to face each other inside both ends of the open portion .

End-to-end ends of the elastically attachable ribs are provided, with elastic arms extending to the rear side of the cover plate, and the outside of each of the tip ends of the spring arms is formed with grooved grooves. The duct body is installed in such a way that it is compressed in the insulating layer forming a side wall surface of the cooling chamber which is the storage space. According to another aspect of the present invention, a conduit structure for a cooler is provided which includes a cooler body in which an insulating layer is formed between the outer and inner housings thereof, and a storage space is provided, comprising: a coupling groove formed to be elongated in one direction by compressing a portion of a surface of the inner housing, forming an interior surface of the storage space inside the insulator layer; and a conduit body formed to elongate in one direction, to settle inside the coupling slot, and which includes a cold air flow path in which cool air flows, and a plurality of discharge holes to allow that the cold air flow path and the storage space communicate with each other and provide cold air to the storage space. An adhesive material is provided between the inner surface of the coupling groove and the corresponding outer groove of the conduit body such that the conduit body is fixed to the coupling groove. Tabs are formed at both longitudinal ends of the conduit body to come into close contact with portions of the surface of the inner housing corresponding to both ends of the coupling groove, and are fastened to the inner housing in a state in which the body The conduit is seated in the coupling slot. According to another aspect of the present invention there is provided a conduit structure for a refrigerator door to selectively open or close a storage space provided inside a refrigerator body, in which an insulating layer is formed between the outer and outer housing. interior of the door thereof, comprising: a depressed portion formed to extend in a direction in the inner housing of the door forming a side wall of the housing space; and a grid plate having a width and a length corresponding to those of the depressed portion of the cover at an inlet of the depressed portion, including a plurality of discharge holes, and forming a cold air flow path in cooperation with the depressed portion. First and second protrusions are formed to protrude parallel with the depressed portion at the upper and lower ends of the depressed portion, respectively, and the first protrusion formed at the upper end protrudes relatively more than the second protrusion formed at the lower end.

The first protrusion is a component that is used for a door rack that is provided with an interior surface of the door.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and other objects and features of the present invention will be apparent from the following description of the preferred embodiments which are given in conjunction with the accompanying drawings, in which: Figure 1 is a sectional view showing the interior constitution of a conventional refrigeration; Figure 2 is a sectional view of a conduit structure for the conventional refrigerator; Figure 3 is a partially cutaway perspective view of another conduit structure for the conventional refrigerator; Figure 4 is a sectional view showing the constitution of a conduit structure for a refrigerator according to a first embodiment of the present invention; Figure 5 is a sectional view showing the constitution of a conduit structure for the refrigerator according to a second embodiment of the present invention; Figure 6 is a sectional view showing the constitution of a conduit structure for the refrigerator according to a third embodiment of the present invention; and Figure 7 is a sectional view showing the constitution of a conduit structure for the refrigerator according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, preferred embodiments of a conduit structure for a refrigerator in accordance with the present invention will be described in detail with reference to the accompanying drawings. Figure 4 is a sectional view showing the constitution of a first embodiment of the present invention. As can be seen in the figure, an insulating layer 105 is formed between the outer and inner housings 101 and 102, which form exterior and interior surfaces of a refrigerator body 100, respectively. The insulator layer 105 serves to prevent some heat transfer between the storage space that is formed inside the cooler body 100, for example, a cooling layer, and the exterior thereof. Side ducts 110 are installed in the inner housing 102 forming an interior wall of the cooling chamber 107, which is a storage space in the refrigerator body 100 constructed as such. Side ducts 110 are installed in portions of the inner housing corresponding to both side walls of cooling chamber 107, to supply cold air to side portions of cooling chamber 107. Side ducts 10 are formed to be elongated from the side top of the bottom of the interior of the cooling chamber 107. Each of the side ducts 110 is composed for the most part by a duct body 120 and a cover plate 130, and the duct body 120 and the cover plate 130 they are attached to each other by means of a coupling hole 103 which is formed in the inner housing 102. The conduit body 120 is formed with a cold air flow path 122, which is a path where cold air flows . The sectional form of the conduit body is not limited to that which appears in the figure of the present embodiment. The entire portion of the cold air flow path 122 of the conduit body 120 corresponding to the coupling hole 103 of the inner housing 102 is open. Portions of the conduit body 120 corresponding to both ends of the open portion, are formed with flanges 124 connected to the inner housing 102 and extending in opposite directions to each other. It is preferable that the tabs 124 have a predetermined width so that the contact areas with the inner housing 102 remain larger than a predetermined value. It is also preferable that the flanges 124 are formed over the entire conduit body 20. Clamping protrusions 126 are formed inside both ends of the open portion of the conduit body 120. The fastening protuberances 126 extend in directions facing one another. to the other on both ends. The holding protuberances 126 are used to hold the cover plate 130. Meanwhile, the cover plate 130 has a length and width capable of protecting the coupling hole 103 that is formed in the inner housing 102. A plurality of holes of cold air discharge 132 are formed in the cover plate 130 in a longitudinal direction thereof. The cold air discharge holes 132 serve to transfer the cold air introduced through the cold air flow path 122 to each portion of the cooling chamber 107. Elastically engagable ribs 134 for fastening to the conduit body 120 are installed in a space between the outer and inner housing 101 and 102, are formed on a back side of the cover plate 130. The resiliently engageable ribs 134 are formed at both longitudinal ends of the cover plate 130. The resiliently engageable ribs 134 are fastened to the holding protuberances 126 of the conduit body 120. , respectively. The tip ends of the elastically engageable ribs 134 are provided with elastic arms 135, respectively, each of which extends towards the rear side of the cover plate 130 and have a predetermined elasticity. The elastic arms 135 are formed on the outside of the elastically engageable ribs 134 at both ends of the cover plate, and face the holding protuberances 126 of the conduit body 120, respectively. The pointed ends of the elastic arms 135 are formed continuously with a plurality of grooved grooves 136, respectively. The pointed ends of the clamping protuberances 126 are seated in the grooved grooves 136, respectively. At this point, the elastic arms 135 are elastically deformed by means of the clamping protuberances 126 and are in a state of being compressed towards the elastically attachable ribs 134, respectively. The operation of the first embodiment of the present invention having the constitution described above will be described below. Each of the side conduits 110 is assembled to the inner housing 102 before forming the insulator layer 105. That is, the conduit body 120 sits on the rear side of the inner housing 102, and the cover plate 130 is attached to the body. of conduit 120 through the coupling holes 103 in the front part of the inner housing 102. At this point, the elastic arms 135 of the elastically engageable ribs 134 inserted in the cold air flow path 122 of the conduit body 120 a through the coupling holes 103, they are guided along the clamping protuberances 126 of the conduit leather 120. In this procedure, the elastic arms 135 are in a state of being compressed towards the elastically attachable ribs 134. When the body of conduit 120 and cover plate 130 are located close to each other, clamping protrusions 126 are seated in grooved grooves 136 of the elastic arms 135. Elastic arms 135 remain in the elastically deformed state. In a state in which the conduit body 120 and the cover plate 130 are coupled to each other with the inner housing 102 interposed therebetween, the flanges 124 should be in close contact with the rear side of the inner housing 102. Here, the degree of close contact of the flanges 124 with the inner housing 102 depends on the grooved grooves in which the clamping protuberances 126 are seated. When the clamping protuberances 126 settle in the grooved grooves 136 closest to the ends at the end of the elastic arms 135, respectively, the flanges 124 come into closer contact with the inner housing 102. Then, Figure 5 shows a second embodiment of the present invention. As can be seen in the figure, an insulator layer 205 is formed between the outer and inner housings 201, 202, which forms exterior and interior surfaces of a refrigerator body 200, respectively. In addition, a coupling slot 203 is formed to be depressed inside the insulator layer 205. The slot 203 is formed in the inner housing 202 to extend vertically. A side duct 210 is installed inside the mating slot 203. The side duct 210 is configured to coincide with the upper interior of the slot 203 taking its shapes into account. In the embodiment of the present invention, the side conduit 210 is formed in such a way that a section of the conduit body 220 thereof is rectangular. The conduit body 220 is elongated to match the coupling slot 203 and is provided with a cold air flow path 222. A plurality of cold air discharge holes 224 are formed in a surface of the conduit body 220., facing the cooling chamber 207. In the embodiment of the present invention, the side conduit 210 is fixed within the coupling slot 203. In such a case, it is preferred that the adhesive material 230 be placed between the coupling slot. 203 and the conduit body 220, to prevent the side conduit 210 from inadvertently detaching from the coupling slot 203. Next, Figure 6 shows a third embodiment of the present invention. As can be seen in the figure, the conduit body 220 is formed with flanges 226 that come into close contact with the inner front surface of the inner housing 202. The flanges 226 are formed vertically at both ends of the conduit body 220, facing the conduit body 220 from the cooling chamber 207. The conduit body 220 with the flanges 226 formed therein, is designed in such a way that the flanges 226 come into close contact with an inner front surface of the inner housing 202 when the body of conduit 220 is secured in the coupling groove 203, which is formed to be depressed in the inner housing 202 in the same manner as in the second embodiment. In addition, to secure the conduit body 220 in the coupling slot 203, screws 228 pass through the flanges 26 and are secured in the inner housing 202. Now the operation of the conduit structure according to the second embodiment will be explained. and the third embodiments of the present invention, constructed as such. In the embodiments of the present invention, the conduit body 220 is installed inside the coupling slot 203 of the inner housing 202 after having previously formed an insulator layer 205. That is, the insulator layer 205 is first formed between the outer housing 201 and the inner housing 202, and then the conduit body 220 engages the depressed engagement slot 203 in the insulator layer 205. At this point, in the second embodiment, the adhesive material is placed inside the engagement slot 203 , and the conduit body 220 is then fixed in the groove with the adhesive material applied thereto. Alternatively, in the third embodiment, the conduit body 220 is inserted into the coupling slot 203 and then clamped in the inner housing 202 and the insulator layer 205 by means of screws 228 passing through the flanges 226, which enter in close contact with the inner housing 202 and screwed into the inner housing 202 and in the insulator layer 205. Finally, Figure 7 shows a fourth embodiment of the present invention. As can be seen in the figure, a door duct 310 is installed on an interior surface of a door 300 by constructing a side wall of a cooling chamber 207 that serves as a storage space. The door 300 is a part for selectively opening or closing the cooling chamber 307, and an outer housing 301 forms a front outer surface of the door 300. An inner housing 302 engages the outer housing 301 to form an interior surface of the door 300. Also, an insulating layer 303 is formed between the outer and inner housings 301, 302. The insulating layer 303 is a part that prevents any transfer of heat through the door 300. In the inner housing 302 of the door, they are formed first and second transverse protuberances 305, 305 ', projecting towards the cooling chamber 307, in such a way that they are separated from one another at a predetermined vertical interval. The transverse protuberances 305, 305 ', are formed to elongate in a lateral direction when viewed in the inner housing 302 from inside the cooling chamber 307. The first transverse protrusion 305 protrudes relatively more than the second transverse protrusion 305'. The first transverse protuberance 305 serves to form a portion of a door basket provided in the door 300, or serves to support the door rack in it. Between the first transverse protrusion 305 and the second transverse protrusion 305 ', a transverse depressed portion 306 is formed to elongate in the lateral direction in the inner housing 302. The transverse depressed portion 306 is formed in such a way that a portion of the inner housing 302 it is depressed relatively. The depressed transverse portion 306 cooperates with the grid plate 320 which will be described below, to form a cold air flow path 330. A gate conduit 310 is formed in the transverse depressed portion 306 of the inner housing 302. That is, the grid plate 320 is installed to cover an inlet of the transverse depressed portion 306. The grid plate 320 has a width and a length corresponding to those of the transverse depressed portion 306. The installation of the grid plate 320 in the Interior housing of the door 302, can be made in a variety of configurations. For example, a structure can be formed by means of which a molded part can be held in the inner housing 302 and the grid plate 320, respectively, in such a way that they can be fastened to one another using clamping screws. Alternatively, the grid plate 320 can be formed integrally with the inner housing 302. A plurality of discharge holes 322 for discharging the cold air in the cooling chamber 307 are punched in the grid plate. Meanwhile, the cold air flow path 330 is formed by installing the grid plate 320 at the inlet of the transverse depressed portion 306. The cold air flow path 330 is connected to a cold air supply path that is formed in the body of the refrigerator, to one side of one end of the inner surface of the door 300 and is supplied with the cold air. The cold air supplied to the cold air flow path 330 is discharged into the cooling chamber 307 through the discharge holes 322. Alternatively, a plurality of cold air flow paths 330 can be formed in the door 300. Next, the operation of the fourth embodiment of the present invention constructed as such will be described. In this embodiment, the door conduit 310 is provided in the interior housing of the door 302 to substantially form an interior wall on one side of the cooling chamber 307, forming the interior surface of the door 300. At this point, the portion depressed transverse 306 is formed in the inner housing 302 and the grid plate 320 covers the entrance of the transverse depressed portion 306 so that the cold air flow path 330 is formed in the transverse depressed portion 306. Therefore, in the present mode the grid plate 320 for forming the cold air fixed path 330 can be installed at any time before and after the formation of the insulator layer 303. Furthermore, in the present embodiment, the gate conduit 310 communicates to a side thereof with the cold air supply path formed in the body of the refrigerator and is supplied with the cold air. Then, the door duct 310 discharges cold air through the discharge holes 322 towards the door 300 and the inlet of the cooling chamber 307. In the present invention constructed as such, it is not necessary to use an insulating member. separated for the formation of the cold air flow path 330, the thickness of the door 300 is relatively prevented from increasing in a portion in which the cold air flow path 330 is formed. No work is necessary to pre-assemble a insulating member or the like, to form the cold air flow path 330. The conduit structure according to the present invention, which was described in detail above, is constructed by forming the depressed conduit inside the wall surface of the storage space. Thus, no foam material is introduced to form the insulating layer inside the duct, so that the duct can be installed more accurately, and the duct is prevented from becoming clogged with the foam material.

Also, since no foam material is introduced into the conduit, the insulator layer can be formed firmly inside the refrigerator body or in the door. Thus, they can improve the insulation characteristics of the refrigerator. According to the present invention, since no pre-assembly work is necessary to apply a separate tape on the rear side of the inner housing with the installation of the conduit body constituting the conduit, the assembly work for the conduit can be done in a relatively quick and easy way. Further, in accordance with the present invention, as no separate insulating material has to be pre-assembled in the insulating layer, when the duct is formed which will be depressed in the wall surface of the storage space, the thickness of the wall forming the insulating layer can be minimized so that the refrigerator storage is increased, or the overall size of the refrigerator can be reduced.

Claims (9)

NOVELTY OF THE INVENTION CLAIMS

1. - A conduit structure for a refrigerator that includes a refrigerator body in which an insulating layer is formed between outer and inner housings thereof, and a storage space is provided, characterized in that it comprises: a conduit body formed to elongate a direction, and includes tabs that come in close contact with the rear side of the inner housing, forming an interior surface of the storage space, and a cold air flow path formed therein; a cover plate attached to the conduit body at the front of the inner housing, formed with a coupling hole, which communicates with the cold air flow path of the conduit body through the coupling hole to protect the path of cold air flow, and is formed with a plurality of cold air discharge holes communicating with the cold air flow path and the storage space; clamping protuberances formed in an inlet of the conduit body corresponding to the rear side of the inner housing; and elastically engageable ribs which are formed on the back side of the cover plate, each includes a plurality of grooved grooves on which each of the fastening protuberances selectively settle, and have elasticity to elastically deform with the fastening of the fasteners. ribs in the clamping protuberances.

2. - The conduit structure according to claim 1, further characterized in that a whole surface of duct body corresponding to the rear side of the inner housing, is formed to be open, and the clamping protuberances are formed to face a the other inside both ends of the open portion.

3. The conduit structure according to claim 1, further characterized in that tip ends of the elastically engageable ribs are provided with elastic arms extending to the rear side of the cover plate, and the outer part of each end The tip of the elastic arms is formed with grooved grooves.

4. The conduit structure according to claims 1, 2 or 3, further characterized in that the conduit body is installed to be depressed inside the insulating layer forming a side wall surface of the cooling chamber which is the space storage.

5. A conduit structure for a refrigerator that includes a refrigerator body in which an insulating layer is formed between the outer and inner housings thereof, and a storage space is provided, characterized in that it comprises: a coupling groove formed for elongating in one direction by depressing a portion of a surface of the inner housing, which forms an interior surface of the storage space inside the insulator layer; and a conduit body formed to elongate in one direction, to settle inside the coupling slot, and which includes a cold air flow path in which cold air flows, and a plurality of discharge holes to allow that the cold air flow path and the storage space communicate with each other, and to provide cold air to the storage space.

6. The conduit structure according to claim 5, further characterized in that an adhesive material is provided between an inner surface of the coupling groove and a corresponding outer surface of the conduit body, such that the conduit body is fixed to the coupling slot.

7. The conduit structure according to claim 5, further characterized in that flanges are formed at both longitudinal ends of the conduit body to come into close contact with portions of the surface of the inner housing corresponding to both ends of the conduit groove. coupling, and are fastened to the inner housing in a state in which the conduit body is seated in the coupling slot.

8. A conduit structure for a refrigerator door for selectively opening or closing a storage space that is provided in a refrigerator body, wherein an insulating layer is formed between the outer and inner door housings thereof, characterized because it comprises: a depressed portion formed to extend in one direction in the inner housing of the door forming a side wall of the storage space; and a grid plate having a width and a length corresponding to those of the depressed portion, to protect an entry of the depressed portion, including a plurality of discharge holes, and forming a cold air flow path in cooperation with the depressed portion.

9. The conduit structure according to claim 8, further characterized in that the first and second protuberances are formed to protrude parallel with the depressed portion at the upper and lower ends of the depressed portion, respectively, and the first The protrusion formed at the upper end protrudes relatively more than the second protrusion formed at the lower end. 10 - The conduit structure according to claim 8, further characterized in that the protrusion is a component that is used for a door rack provided with an interior surface of the door. SUMMARY OF THE INVENTION The present invention relates to a conduit structure for a refrigerator; an insulator layer 105 is formed between outer and inner housings 101 and 102, which form exterior and interior surfaces of the cooler body 100, respectively; a conduit body 120 with a cold air flow path 122 formed therein is installed on the rear side of the inner housing 102 where the insulator layer 105 is formed; the conduit body 120 is formed to elongate in the inner housing 102 vertically, a side thereof which is directed towards the inner housing 102 is open, and both ends thereof are formed with flanges 124 in a longitudinal direction; the flanges 124 are portions that come in close contact with the rear side of the inner housing 102; both ends of the open inlet or the portion of the conduit body 120 are formed with holding protrusions 126; the inner housing 102 is provided with a perforated coupling hole 103 to allow a cooling chamber 107 and a cold air flow path 22 to communicate with each other through the open portion of the conduit body 120; a cover plate 130 is attached to the conduit leather 120 through the coupling hole 103 opposite the inner housing 102; the rear side of the cover plate 130 is formed with engageable resilient ribs 134, and resilient arms 135 are formed to protrude from the tip ends of the engageable resilient ribs 134, to the rear side of the cover plate 130, respectively; the pointed ends of the elastic arms 135 are formed with a plurality of grooved grooves 136, respectively. P02 / 1406