JP7385912B2 - Refrigerator and its manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a refrigerator that cools and stores foods and the like in storage chambers, and a method for manufacturing the same, and particularly relates to a refrigerator having a heat insulating partition wall that separates storage chambers from each other, and a method for manufacturing the same.

A typical refrigerator has a plurality of storage compartments having different internal temperatures, and a heat insulating partition wall filled with a heat insulating material is arranged between the storage compartments.

With reference to FIG. 8, a structure for partitioning each storage chamber in the background art described in Patent Document 1 will be described. FIG. 8 is an exploded perspective view showing a refrigerator 1100 according to the background art. Refrigerator 1100 has a heat insulating box 1101, and a storage chamber is formed inside the heat insulating box 1101.

The insulating box body 1101 includes an outer box 1102, an inner box 1103 placed inside the outer box 1102, and a heat insulating material 1104 filled with foam between the outer box 1102 and the inner box 1103. . The storage compartment formed inside the heat insulating box 1101 includes, from above, a refrigerator compartment 1105, a freezer compartment 1106, and a vegetable compartment 1107.

The refrigerator compartment 1105 and the freezer compartment 1106 are separated by a heat insulating partition wall 1108 having a heat insulating structure. Further, the freezer compartment 1106 and the vegetable compartment 1107 are separated by a heat insulating partition wall 1109 having a heat insulating structure.

In the manufacturing process of the refrigerator 1100, after an inner box 1103 is placed inside an outer box 1102, a heat insulating material 1104 is foam-filled between the outer box 1102 and the inner box 1103. Furthermore, a heat insulating partition wall 1108 and a heat insulating partition wall 1109 prepared as separate parts are fitted into the inside of the inner box 1103. Thereby, the refrigerator compartment 1105 and the freezer compartment 1106 are heat-insulatedly partitioned by the heat-insulating partition wall 1108, and the freezer compartment 1106 and the vegetable compartment 1107 are heat-insulatedly partitioned by the heat-insulating partition wall 1109.

JP 2018-179407 Publication

However, with the above-mentioned background technology, there is room for improvement from the viewpoint of cooling efficiency of each storage compartment.

Specifically, the refrigerator compartment 1105 and the freezer compartment 1106 are insulated by a heat insulating partition wall 1108 that is prepared as a separate part from the heat insulating box 1101, but since the heat insulating partition wall 1108 is a separate part, It has not been easy to obtain a high heat insulation effect with the partition wall 1108. The same problem can be said about the heat insulating partition wall 1109 that insulates the freezer compartment 1106 and the vegetable compartment 1107.

Further, in the manufacturing process of the heat insulating box 1101, preparing the heat insulating partition wall 1108 and the heat insulating partition wall 1109 as separate parts may increase the manufacturing cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigerator that can improve the heat insulation effect of a heat insulation partition wall that heat-insulates each storage compartment, and a method for manufacturing the same. With the goal.

The refrigerator of the present invention includes: an outer box; a first inner box that is arranged on an inner side separated from the outer box and forms a first storage chamber; a second inner box disposed below the first storage chamber to form a second storage chamber; a heat insulating material filled between the outer box, the first inner box, and the second inner box; A heat insulating partition wall that partitions a first storage room and a second storage room, and a communication portion that penetrates the heat insulating partition wall and communicates the first inner box and the second inner box. , the communication portion includes a first fitting portion attached to a first opening formed on the lower surface of the first inner box, and a second fitting portion attached to a second opening formed on the upper surface of the second inner box. and a sealing member made of a soft material and filling a space between the first fitting part and the second fitting part.

Further, in the refrigerator of the present invention, the first fitting part is formed with a first cylindrical part extending downward, and the second fitting part is formed with the first cylindrical part extending upward. A second cylindrical portion having a width different from that of the second cylindrical portion is formed, and the sealing member is disposed between a side surface of the first fitting portion and a side surface of the second fitting portion. .

Further, in the refrigerator of the present invention, a water supply tank disposed in the first storage compartment, an ice maker disposed in the second storage compartment, and a conductor through which water supplied from the water supply tank to the ice maker circulates. The ice machine further includes a water channel, and the water conduit connects the water supply tank and the ice maker via the communication section.

In the method for manufacturing a refrigerator of the present invention, the first fitting portion is attached to the first opening formed on the lower surface of the first inner box, and the second fitting portion is attached to the second opening formed on the upper surface of the second inner box. a step of arranging a sealing member between the first fitting part and the second fitting part, and arranging the second inner box below the first inner box; and the second fitting part, and the first inner box and the second inner box are installed inside an outer box, and the first inner box, the second inner box, and the outer box are fitted together. A heat insulating material is filled between the first inner box and the second inner box, and the heat insulating material is filled between the lower surface of the first inner box and the upper surface of the second inner box to form a heat insulating partition wall. The method is characterized by comprising a step of communicating the first inner box and the second inner box through a communication section including the first inner box and the second fitting section.

The refrigerator of the present invention includes: an outer box; a first inner box that is arranged on an inner side separated from the outer box and forms a first storage chamber; a second inner box disposed below the first storage chamber to form a second storage chamber; a heat insulating material filled between the outer box, the first inner box, and the second inner box; A heat insulating partition wall that partitions a first storage room and a second storage room, and a communication portion that penetrates the heat insulating partition wall and communicates the first inner box and the second inner box. , the communication portion includes a first fitting portion attached to a first opening formed on the lower surface of the first inner box, and a second fitting portion attached to a second opening formed on the upper surface of the second inner box. and a sealing member made of a soft material and filling a space between the first fitting part and the second fitting part. As a result, according to the refrigerator of the present invention, even if a slight deviation occurs in the relative positions of the first inner box and the second inner box, the sealing member made of a soft material can maintain the position between the first fitting part and the second inner box. By being arranged and deformed between the first fitting part and the fitting part, the gap between the first fitting part and the second fitting part can be sealed.

Further, in the refrigerator of the present invention, the first fitting part is formed with a first cylindrical part extending downward, and the second fitting part is formed with the first cylindrical part extending upward. A second cylindrical portion having a width different from that of the second cylindrical portion is formed, and the sealing member is disposed between a side surface of the first fitting portion and a side surface of the second fitting portion. . Thereby, according to the refrigerator of the present invention, the space between the first cylindrical part and the second cylindrical part can be more effectively sealed by the sealing member.

Further, in the refrigerator of the present invention, a water supply tank disposed in the first storage compartment, an ice maker disposed in the second storage compartment, and a conductor through which water supplied from the water supply tank to the ice maker circulates. The ice machine further includes a water channel, and the water conduit connects the water supply tank and the ice maker via the communication section. As a result, according to the refrigerator of the present invention, in a refrigerator having an automatic ice maker, the gap between the first fitting part and the second fitting part of the communication part through which the water conduit is inserted can be sealed. I can do it.

In the method for manufacturing a refrigerator of the present invention, the first fitting portion is attached to the first opening formed on the lower surface of the first inner box, and the second fitting portion is attached to the second opening formed on the upper surface of the second inner box. a step of arranging a sealing member between the first fitting part and the second fitting part, and arranging the second inner box below the first inner box; and the second fitting part, and the first inner box and the second inner box are installed inside an outer box, and the first inner box, the second inner box, and the outer box are fitted together. A heat insulating material is filled between the first inner box and the second inner box, and the heat insulating material is filled between the lower surface of the first inner box and the upper surface of the second inner box to form a heat insulating partition wall. The method is characterized by comprising a step of communicating the first inner box and the second inner box through a communication section including the first inner box and the second fitting section. As a result, according to the method for manufacturing a refrigerator of the present invention, by arranging the sealing member between the first fitting part and the second fitting part, the first fitting part is removed in the step of filling the heat insulating material. The foamed heat insulating material can be prevented from entering the inside of the first inner box or the second inner box from between the part and the second fitting part.

1 is a perspective view showing a refrigerator according to an embodiment of the present invention. FIG. 1 is a perspective view showing a heat insulating box of a refrigerator according to an embodiment of the present invention. FIG. 1 is a side sectional view showing a refrigerator according to an embodiment of the present invention. 1 is a diagram showing an embodiment of the present invention, in which (A) is a side cross-sectional view showing a communicating portion, and (B) is a cutaway perspective view of the communicating portion. 1 is a diagram showing an embodiment of the present invention, (A) is a perspective view showing a step of assembling a first inner box and a second inner box in a manufacturing method of a refrigerator, and (B) is a perspective view showing a sealing member. It is a diagram. It is a figure which shows embodiment of this invention, and is an exploded side sectional view which shows the process of assembling a 1st fitting part and a 2nd fitting part in the manufacturing method of a refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of this invention, and is a side sectional view which shows the process of foam-filling a heat insulating material in the manufacturing method of a refrigerator. FIG. 1 is an exploded perspective view showing a refrigerator according to the background art.

Hereinafter, a refrigerator 10 according to an embodiment of the present invention will be described in detail based on the drawings. In the description of this embodiment, the same reference numerals are used for the same members in principle, and repeated description will be omitted. Further, in the following description, the directions will be described using up, down, front, back, left, and right directions, but left and right are left and right when the refrigerator 10 is viewed from the front.

FIG. 1 is a perspective view of a refrigerator 10 according to an embodiment of the present invention, viewed from the front right side. The refrigerator 10 has a heat insulating box 11 and a storage chamber formed inside the heat insulating box 11. As a storage room, it has a refrigerating room 12 and a freezing room 13 from the upper side. The front opening of the refrigerator compartment 12 is closed at the upper stage by a heat insulating door 18 and at the lower stage by a heat insulating door 19. The front opening of the freezer compartment 13 has an upper part closed by a heat insulating door 20 and a lower part closed by a heat insulating door 21. The heat insulating door 18 is a rotating door, and the heat insulating door 19, the heat insulating door 20, and the heat insulating door 21 are pull-out doors. Here, the refrigerator compartment 12 is the first storage compartment, and the freezing compartment 13 is the second storage compartment.

FIG. 2 is a perspective view showing the heat insulating box 11 from which the above-described heat insulating door 18, heat insulating door 19, heat insulating door 20, and heat insulating door 21 have been removed.

The refrigerator compartment 12 includes an upper refrigerator compartment 121 and a lower refrigerator compartment 122. Furthermore, the freezer compartment 13 is composed of an upper freezer compartment 131 and a lower freezer compartment 132.

The refrigerator compartment 12 and the freezer compartment 13 are separated by a heat insulating partition wall 28. The heat insulating partition wall 28 is a heat insulating member filled with a heat insulating material such as urethane.

FIG. 3 is a side cross-sectional view showing the refrigerator 10 as a whole. The insulating box body 11 includes an outer box 111 made of a steel plate bent into a predetermined shape, an inner box 112 made of a synthetic resin plate placed inside the outer box 111, and an outer box 111 and an inner box 112. and a heat insulating material 113 filled in between.

In the present embodiment, the inner box 112 is composed of a first inner box 23 and a second inner box 24. The refrigerator compartment 12 is formed inside the first inner box 23, and the inside of the second inner box 24 is A freezing chamber 13 is formed therein. The first inner box 23 and the second inner box 24 are separately formed resin molded bodies.

The refrigerator compartment 12 and the freezer compartment 13 are separated by a heat insulating partition wall 28 having a heat insulating structure. The heat insulating partition wall 28 is made of a heat insulating material 113 filled in a space formed between the lower surface of the first inner box 23 and the upper surface of the second inner box 24. Therefore, compared to the partitioning thermal structure according to the background art, there is no need to prepare a member that becomes the heat insulating partition wall 28 separately from the inner box 112, so the number of parts required for the refrigerator 10 can be reduced. Furthermore, since the heat insulating partition wall 28 is formed as part of the heat insulating material 113 between the refrigerator compartment 12 and the freezer compartment 13, the heat insulating partition wall 28 effectively insulates the refrigerator compartment 12 and the freezer compartment 13. be able to.

The refrigerator 10 has an automatic ice-making function, and includes a water supply tank 40, an ice-making machine 41, and a water conduit 42. The water supply tank 40 is a tank disposed at the lowest stage of the refrigerator compartment 12, and stores water for ice making. The ice maker 41 is an automatic ice maker that is disposed at the top of the freezer compartment 13 and automatically makes ice from water supplied from the water tank 40 . Water supplied from the water supply tank 40 to the ice maker 41 passes through a water conduit 42. The water conduit 42 is an aluminum pipe whose upper end communicates with the water supply tank 40 and whose lower end communicates with the ice maker 41.

The communication portion 30 is a portion that vertically penetrates the heat insulating partition wall 28 and connects the refrigerator compartment 12 and the freezer compartment 13. The specific configuration of the communication section 30 will be described later with reference to FIG. 4. The water supply channel 42 penetrates the communication portion 30 and allows the water supply tank 40 and the water supply channel 42 to communicate with each other. Water stored in the water supply tank 40 is supplied to the ice maker 41 via a water conduit 42 inserted into the communication portion 30 .

A cooling chamber 115 is formed at the back side of the freezing chamber 13, and the freezing chamber 13 and the cooling chamber 115 are partitioned by a partition plate 27. Inside the cooling chamber 115, an evaporator 116, which is a cooler, is arranged. Further, a machine room 14 is defined at the rear of the lower end of the refrigerator 10, and a compressor 22 is disposed in the machine room 14. The evaporator 116 and the compressor 22, together with a condenser, a dryer, and a capillary tube (not shown here), form a refrigerant compression type refrigeration cycle 16. By operating the refrigeration cycle 16, the cold air inside the cooling chamber 115 is cooled by the evaporator 116, and by blowing this cold air to each storage chamber, the internal temperature of each storage chamber is brought into a predetermined cooling temperature range. Ru.

Inside the cooling chamber 115, a blower 29 is arranged above the evaporator 116. The blower 29 is an axial blower or a centrifugal blower, and blows the cold air inside the cooling room 115 cooled by the evaporator 116 toward the refrigerator room 12 and the freezer room 13 .

A defrosting heater 117 is arranged inside the cooling chamber 115 and below the evaporator 116 . As the refrigerant compression refrigeration cycle operates, thick frost forms on the surface of the evaporator 116. When this happens, the control means (not shown) stops the compressor 22, closes the cooling chamber 115, and energizes and heats the defrosting heater 117, thereby performing a defrosting operation to melt and remove the frost.

The cold air blown from the blower 29 is blown to the refrigerator compartment 12 and the freezer compartment 13 via an air passage (not shown). Furthermore, the cold air that has cooled the refrigerator compartment 12 and the freezer compartment 13 returns to the cooling compartment 115 via a return air path (not shown). With this configuration, the refrigerating compartment 12 is cooled to a refrigeration temperature range, and the freezing compartment 13 is cooled to a freezing temperature range.

The configuration of the communication section 30 will be explained with reference to FIG. 4. 4(A) is a side cross-sectional view showing the communicating portion 30, and FIG. 4(B) is a cutaway perspective view showing the communicating portion 30. FIG.

Referring to FIGS. 4(A) and 4(B), the communication portion 30 includes a first fitting portion 31, a second fitting portion 32, and a seal member 33.

The first fitting part 31 is a member attached to the lower opening of the first inner box 23 shown in FIG. 3, and forms an upper part of the communication part 30. The first fitting portion 31 has a concave portion 36 that is recessed downward, and a first cylindrical portion 34 is formed at the lower end of the concave portion 36 .

The second fitting portion 32 is a member attached to the upper opening of the second inner box 24 shown in FIG. 3, and has a concave portion 37 recessed downward. A second cylindrical portion 35 is formed that projects upward from the bottom of the concave portion 37 in a cylindrical shape. Further, inside the second cylindrical portion 35, a substantially annular bottom portion 38 is formed when viewed from above, and a through hole 39 is formed in the center of the bottom portion 38.

Referring to FIG. 4(A), the inner diameter L11 of the second cylindrical portion 35 is larger than the outer diameter L10 of the first cylindrical portion 34. The inner diameter L11 of the second cylindrical portion 35 is, for example, longer than the outer diameter L10 of the first cylindrical portion 34 by 6 mm or more. In other words, the outer side surface of the first cylindrical portion 34 is spaced apart from the inner side surface of the second cylindrical portion 35. Thereby, the seal member 33 can be arranged between the first cylindrical part 34 and the second cylindrical part 35. Here, as will be described later, the seal member 33 has a flat cylindrical shape with a through hole formed in the center. Further, the width L13 of the through hole 39 formed in the second cylindrical portion 35 is shorter than the inner diameter L12 of the first cylindrical portion 34 of the communication portion 30.

The sealing member 33 disposed between the first cylindrical part 34 of the first fitting part 31 and the second cylindrical part 35 of the second fitting part 32 is made of, for example, a foamed resin with excellent flexibility, It is compressed between the outer surface of the first cylindrical portion 34 and the inner surface of the second cylindrical portion 35 . By forming the sealing member 33, in the step of foam-filling the heat insulating material 113 described above, the material of the heat insulating material 113 is removed from between the first fitting part 31 and the second fitting part 32 into the refrigerator compartment. 12 or the freezer compartment 13 can be prevented. Further, since the sealing member 33 is arranged between the first cylindrical part 34 and the second cylindrical part 35 in a vertically compressed state, the first cylindrical part 34 and the second cylindrical part The effect of sealing the gap with 35 can be increased.

Next, a method for manufacturing the refrigerator 10 described above will be described with reference to FIGS. 5 to 7.

FIG. 5(A) is an exploded perspective view showing the process of assembling the first inner box 23 and the second inner box 24 to each other, and FIG. 5(B) is a perspective view showing the sealing member 33. First, the first fitting part 31 is attached to the first opening 25 formed on the lower surface of the first inner box 23, and the second fitting part 32 is attached to the second opening 26 formed on the upper surface of the second inner box 24.

The first opening 25 is formed by opening the left rear end of the lower surface portion 231 of the first inner box 23 . The first fitting portion 31 is attached to the lower surface of the first inner box 23 so as to cover the portion where the first opening 25 is formed. Further, the second opening 26 is formed by opening the left rear end portion of the upper surface portion 241 of the second inner box 24 . The second fitting portion 32 is incorporated into the upper surface portion 241 from above.

A seal member 33 is placed on the bottom portion 38 of the second fitting portion 32 . As shown in FIG. 5(B), the seal member 33 is made of a soft material such as foamed resin and has a flat cylindrical shape, and has a through hole 331 extending through its center in the thickness direction.

The water conduit 42 includes the first opening 25 of the first inner box 23 , the first cylindrical part 34 of the first fitting part 31 , the through hole 331 of the seal member 33 , and the second cylindrical part of the second fitting part 32 . 35 and is inserted into the second opening 26 of the second inner box 24.

FIG. 6 is a side sectional view showing a state in which the first fitting part 31 of the first inner box 23 is inserted into the second fitting part 32 of the second inner box 24.

In this step, the first cylindrical part 34 of the first fitting part 31 attached to the lower surface part 231 of the first inner box 23 is connected to the second fitting part 34 of the first fitting part 31 attached to the upper surface part 241 of the second inner box 24. 32 into the second cylindrical part 35. At this time, the seal member 33 is compressed between the first cylindrical part 34 and the second cylindrical part 35, as shown in FIG. 4(A).

Due to processing tolerances, distortions, etc. of the first inner box 23 and the second inner box 24, the first cylindrical part 34 on the first inner box 23 side and the second cylindrical part 35 on the second inner box 24 side The relative position may shift in the front, back, left and right directions. Since the inner diameter L11 of the second cylindrical part 35 is made larger than the outer diameter L10 of the first cylindrical part 34, even if a positional shift occurs between the two, the first cylindrical part 34 can be reliably moved to the second cylindrical part 35. It can be arranged inside the cylindrical part 35. Moreover, the sealing member 33 is compressed between the second cylindrical part 35 and the first cylindrical part 34, thereby sealing the gap between the first cylindrical part 34 and the second cylindrical part 35. be able to. Therefore, in the next step, it is possible to prevent the heat insulating material 113 from entering the inside of the first inner box 23 or the second inner box 24 from between the first cylindrical part 34 and the second cylindrical part 35. .

Through the above steps, as shown in FIG. The inner box 24 communicates with the freezer compartment 13, which is an internal space, via a communication portion 30.

Referring to FIG. 7, next, a heat insulating material 113 is foam-filled between the inner box 112 and the outer box 111. FIG. 7 is a side sectional view showing the foam filling process.

In this step, first, the first inner box 23 and the second inner box 24, which communicate with each other via the communication part 30, are placed inside the heat insulating box 11. Next, a liquid foam material such as polyurethane foam is injected through an opening (not shown) formed in the outer box 111. The injected liquid foam material is foamed and filled between the outer box 111 and the inner box 112 while foaming. Further, a part of the injected liquid foam material is also foamed and filled between the lower surface part 231 of the first inner box 23 and the upper surface part 241 of the second inner box 24, thereby forming the heat insulating partition wall 28. be done.

In this step, the pressure of the foamed resin also acts on the communication portion 30. As shown in FIG. 4(A), the gap between the first cylindrical part 34 of the first fitting part 31 and the second cylindrical part 35 of the second fitting part 32, which constitute the communication part 30, is It is sealed by a compressed seal member 33. Therefore, the foamed material can be prevented from entering into the refrigerator compartment 12 or the freezer compartment 13 through the gap between the first cylindrical part 34 and the second cylindrical part 35.

After the above steps are completed, referring to FIG. Connect via Further, an evaporator 116, a defrosting heater 117, and the like are assembled to the outer box 111. Furthermore, the heat insulating door 18 or the heat insulating door 21 shown in FIG. 1 is assembled to the heat insulating box 11. Refrigerator 10 is manufactured through these steps.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

10 Refrigerator 11 Insulating box body 111 Outer box 112 Inner box 113 Insulating material 115 Cooling chamber 116 Evaporator 117 Defrosting heater 12 Refrigerating chamber 121 Upper refrigerating chamber 122 Lower refrigerating chamber 13 Freezing chamber 131 Upper freezing chamber 132 Lower freezing chamber 14 Machine room 16 Refrigeration cycle 18 Insulation door 19 Insulation door 20 Insulation door 21 Insulation door 22 Compressor 23 First inner box 231 Lower part 24 Second inner box 241 Upper part 25 First opening 26 Second opening 27 Partition plate 28 Insulation partition wall 29 Blower 30 Communication part 31 First fitting part 32 Second fitting part 33 Seal member 331 Through hole 34 First cylindrical part 35 Second cylindrical part 36 Concave part 37 Concave part 38 Bottom part 39 Through hole 40 Water tank 41 Ice making Machine 42 Water conduit 1100 Refrigerator 1101 Insulating box body 1102 Outer box 1103 Inner box 1104 Insulating material 1105 Refrigerator compartment 1106 Freezer compartment 1107 Vegetable compartment 1108 Insulating partition wall 1109 Insulating partition wall

Claims (4)

outer box and
a first inner box disposed inside the outer box and forming a first storage chamber;
a second inner box disposed inside the outer box and spaced apart from the outer box, and disposed below the first storage chamber to form a second storage chamber;
a heat insulating material filled between the outer box, the first inner box, and the second inner box;
an insulating partition wall that partitions the first storage room and the second storage room;
a communication part that penetrates the heat insulating partition wall and communicates the first inner box and the second inner box,
The communication portion includes a first fitting portion attached to a first opening formed on the lower surface of the first inner box, and a second fitting portion attached to a second opening formed on the upper surface of the second inner box. and a sealing member made of a soft material that fills the space between the first fitting part and the second fitting part. A first cylindrical part extending downward is formed in the first fitting part,
A second cylindrical portion extending upward and having a width different from that of the first cylindrical portion is formed in the second fitting portion,
The refrigerator according to claim 1, wherein the sealing member is arranged between a side surface of the first fitting part and a side surface of the second fitting part. Further comprising a water supply tank disposed in the first storage chamber, an ice maker disposed in the second storage chamber, and a water conduit through which water supplied from the water supply tank to the ice maker flows,
The refrigerator according to claim 1 or 2, wherein the water conduit connects the water supply tank and the ice maker via the communication section. attaching the first fitting part to the first opening formed on the lower surface of the first inner box, and attaching the second fitting part to the second opening formed on the upper surface of the second inner box;
A sealing member is arranged between the first fitting part and the second fitting part, and the second inner box is arranged below the first inner box. a step of fitting the second fitting part;
The first inner box and the second inner box are installed inside an outer box, a heat insulating material is filled between the first inner box, the second inner box, and the outer box, and the first inner box A heat insulating partition wall is formed by filling the heat insulating material between the lower surface of the inner box and the upper surface of the second inner box, and a communication section consisting of the first fitting part and the second fitting part connects the second inner box with the heat insulating material. A method for manufacturing a refrigerator, comprising the step of communicating the first inner box and the second inner box.

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