KR102547150B1 - A refrigerator comprising a vacuum space - Google Patents

Abstract

The present invention relates to a refrigerator having a vacuum space, and more particularly, to a refrigerator capable of improving the insulation function of the refrigerator by forming a vacuum space between an outer case and an inner case constituting a main body.
A refrigerator having a vacuum space according to the present invention includes a main body having a storage space in which predetermined stored objects can be accommodated, and the main body includes an inner case with the storage space formed on the inside and a communication hole formed on one side. and; an outer case in which the inner case is accommodated, the inner surface of which is spaced apart from the outer surface of the inner case by a predetermined distance, and a communication hole formed at a position corresponding to the communication hole of the inner case; a vacuum space part provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; It is characterized in that it comprises a connecting pipe connecting the communication hole of the inner case and the communication hole of the outer case in the vacuum space to form a passage through which drainage or pipes pass.

Description

A refrigerator comprising a vacuum space

The present invention relates to a refrigerator having a vacuum space, and more particularly, to a refrigerator capable of improving the insulation function of the refrigerator by forming a vacuum space between an outer case and an inner case constituting a main body.

A refrigerator is an electrical appliance capable of refrigerating or freezing storage by maintaining the temperature of a storage compartment at a temperature above or below zero using a refrigerant cycle.

Looking at the general configuration of a refrigerator, it includes a main body in which a storage space capable of storing stored objects is formed, and a door that is rotatably disposed or slidably disposed in the main body to open and close the storage space.

The main body includes an inner case in which a storage space is formed and an outer case in which the inner case is accommodated, and a heat insulating material is disposed between the inner case and the outer case.

The influence of the temperature in the storage space by the external temperature is suppressed by this heat insulating material.

Urethane foam is widely used as the heat insulator, and liquid urethane is injected into the space between the inner case and the outer case to be foam molded.

However, in order to realize the insulation effect using the insulation material, the thickness of the insulation material must be secured to a certain extent, which means that the insulation material becomes thicker. It gets bigger.

However, recently, a trend of miniaturization of refrigerators has emerged, and a need for a structure capable of reducing the external size while increasing the volume of the internal storage space has appeared.

Therefore, the present invention proposes a refrigerator having a new structure in which insulation is formed by forming a vacuum space instead of injecting an insulating material between the inner case and the outer case of the refrigerator.

On the other hand, in the refrigerator, since water vapor is cooled and attached to the evaporator forming the refrigeration cycle, it is provided with a defrosting device that heats it to make it into water and then removes it.

The water melted by the defrosting device is connected to be discharged to the outside of the refrigerator through a drain pipe, and the drain pipe is connected to the outside through the inner case and the outer case and the insulation material therebetween.

In addition, there are cases where a pipe is connected from the inside of the refrigerator to the outside other than the drain pipe.

In the case of a conventional refrigerator in which a foam material is provided in a space between an inner case and an outer case, the pipe may simply be connected to pass through the inner case, the insulator, and the outer case.

Therefore, the pipe was simply molded of plastic and piped to pass through the inner case and the outer case, and then the insulator was foam-molded.

However, in the case of the vacuum refrigerator of the present invention, since the pipe must be connected to pass through the vacuum space while maintaining the vacuum space, it is difficult to seal the connection when using a plastic pipe, and the vacuum pressure of the vacuum space is reduced. I have an intolerable problem.

In addition, when the pipe is formed using a metal pipe that can be welded to the inner case and the outer case, which are generally formed of steel plates, heat transfer occurs through the pipe, thereby impairing the insulation performance of the refrigerator.

The present invention has been made to solve the above conventional problems, and an object of the present invention is to provide a refrigerator capable of enhancing the insulation effect by forming a vacuum space between an inner case and an outer case, while minimizing the external volume. there is.

In addition, an object of the present invention is to provide a refrigerator having a support structure capable of maintaining a gap between the inner case and the outer case without being deformed by an external impact while a vacuum space is formed between the inner case and the outer case.

In addition, the present invention is to provide a refrigerator including a connection pipe having a structure capable of withstanding vacuum pressure while drain, pipe, or refrigerant pipe passing through the vacuum space.

In addition, it is intended to provide a connection tube structure capable of minimizing heat transfer through a connection tube connected to pass through the vacuum space.

A refrigerator having a vacuum space of the present invention for achieving the above object includes a main body having a storage space in which a predetermined storage can be accommodated, wherein the main body has the storage space formed inside and on one side. an inner case in which a communication hole is formed; an outer case in which the inner case is accommodated, the inner surface of which is spaced apart from the outer surface of the inner case by a predetermined distance, and a communication hole formed at a position corresponding to the communication hole of the inner case; a vacuum space part provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; It is characterized in that it comprises a connecting pipe connecting the communication hole of the inner case and the communication hole of the outer case in the vacuum space to form a passage through which drainage or pipes pass.

It is preferable that the side wall of the connection pipe is formed in a corrugated form to maintain strength to maintain airtightness of the vacuum space and to minimize heat transfer by conduction.

The connection pipe is preferably in the form of a bellows type pipe.

It is preferable that the connecting pipe is manufactured by molding a thin metal plate and welded to the inner case and the outer case, respectively.

The corrugated part of the side wall of the connector is preferably made of a thin metal plate having a thickness of 0.05 to 0.2 mm.

The body includes a first support plate provided on at least one surface of surfaces of the inner case and the outer case facing each other, and is fixedly disposed on the first support plate to maintain a distance between the inner case and the outer case. It is preferable to further include a plurality of spacers.

The main body may further include a second support plate provided on at least one of surfaces of the inner case and the outer case facing each other and disposed to face the first support plate.

It is preferable to include a plurality of grooves formed on an inner surface of the second support plate so that ends of the plurality of spaces are inserted.

It is preferable that the connecting pipe is spaced apart from the spacer so as not to interfere with the plurality of spacers.

It is preferable that the connection tube penetrates the first support plate and the second support plate and is welded to the inner case and the outer case, respectively.

It is preferable that the inner surface of the connecting pipe is coated with plastic to prevent corrosion.

According to the refrigerator of the present invention described above, a vacuum space portion, which is not a normal heat insulating material, is formed between the inner case and the outer case, and heat transfer between the inner case and the outer case is suppressed by the vacuum space portion. action takes place

Since the thermal insulation effect in a vacuum state is significantly superior to that of conventional thermal insulators, the refrigerator according to the present invention has an advantage of superior thermal insulation compared to conventional refrigerators.

On the other hand, in the case of the vacuum space, insulation is performed as long as the vacuum state is maintained regardless of its thickness (interval between the inner case and the outer case). An increase in thickness leads to an increase in the size of the refrigerator.

Therefore, compared to conventional refrigerators, the refrigerator according to the present invention can reduce the size of the outer case while maintaining the same storage space, thereby contributing to compactness of the refrigerator.

In addition, a refrigerator including a connection pipe having a structure capable of withstanding vacuum pressure while passing through a drain or pipe passing through the vacuum space is provided.

In addition, it is possible to minimize heat transfer through the connecting pipe connected to pass through the vacuum space between the inner case and the outer case.

In addition, since at least a part of the side wall of the connecting pipe is formed in the form of a bellows type pipe, elastic deformation is possible, and thus durability against external impact is excellent.

1 is a perspective view showing an example of a refrigerator according to the present invention.
2 is a partially cut-away perspective view showing that a connection pipe is connected through a vacuum space between an inner case and an outer case in a refrigerator according to the present invention.
Figure 3 is a partial cross-sectional view showing the connection pipe of Figure 2 and the inner case and outer case around it.
Figure 4 is a perspective view separately showing the connection pipe of Figure 3;
5 is a partially cut-away perspective view showing an inner case, an outer case, a spacer therebetween, and an assembly structure thereof.
6 is a partial cross-sectional perspective view showing a state in which the connection pipe of FIG. 4 is welded and assembled to the case structure of FIG. 5;
7 is a cross-sectional view showing that a plastic coating layer is formed on the inner surface of the connecting pipe of FIG. 3 .

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

1 shows an example of a refrigerator according to the present invention. FIG. 2 is a partially cut-away perspective view showing that a connection pipe is connected through a vacuum space between an inner case and an outer case in a refrigerator according to the present invention. FIG. 3 is a partial cross-sectional view showing the connector of FIG. 2 and the inner case and outer case around it. 4 is a perspective view showing the connecting pipe separately.

As shown in FIG. 1, the refrigerator according to the present invention includes a main body 1 in which a storage compartment is formed, a first door 4 rotatably provided on the left side of the main body 1, and the main body 1. It includes a second door 5 rotatably provided on the right side of.

Here, the first door 4 opens and closes the freezing compartment of the storage compartment, and the second door 5 opens and closes the refrigerating compartment of the storage compartment, but the present invention is not limited to the refrigerator having this structure.

That is, the refrigerator of FIG. 1 is a so-called side-by-side type refrigerator in which the freezing compartment is disposed on the left side and the refrigerating compartment is disposed on the right side. Applicable to refrigerators. In addition, it can be applied to a refrigerator having only a refrigerating compartment or a freezing compartment or a refrigerator further including a separate cooling compartment in addition to the refrigerating compartment and the freezing compartment.

Looking at the structure of the main body 1, the inner case 110 in which the storage space is formed to the inside; an outer case 120 accommodating the inner case and spaced apart from the inner case by a predetermined distance; a vacuum space part 130 provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; The vacuum space includes a connection pipe 200 connecting the communication hole 112 of the inner case and the communication hole 122 of the outer case to form a passage through which drainage or pipes pass.

The outer case 120 and the inner case 110 are disposed to be spaced apart from each other, and a separate heat insulating material is not disposed in this space, but only maintained in a vacuum state to perform an insulation function.

That is, as the vacuum space 130 is formed between the outer case 120 and the inner case 110, the medium mediating heat transfer between the inner case 110 and the outer case 120 is removed. keep

By doing so, it is possible to prevent the heat of the hot air outside the outer case 120 from being transferred to the inner case 110 and the inside thereof.

Meanwhile, in FIG. 1 , the inner case 110 , the outer case 120 , and the spacer 150 are illustrated with the connecting pipe 200 omitted for convenience.

The connection pipe 200 and the spacer 150 will be described in detail later.

The connection pipe 200 is used as a passage through which defrost water such as an evaporator is discharged or a passage through which a pipe connected from the inside of the inner case 110 to the outside of the outer case 120 can pass. It can be.

Since the connection tube 200 needs to maintain a vacuum state while penetrating the vacuum space 130, it is preferable that the connection parts of the inner case 110 and the outer case 120 are welded to withstand the vacuum pressure.

To this end, since both the inner case 110 and the outer case 120 are generally made of steel plate, the connection pipe 200 is preferably made of a metal material that can be welded to the steel plate.

In addition, the connection pipe 200 preferably has a corrugated sidewall to maintain strength to maintain the airtightness of the vacuum space 130 and to minimize heat transfer by conduction.

The corrugated side wall portion of the connector 200 is called a side wall corrugated portion 240 .

Since the side wall corrugated portion 240 must withstand the vacuum pressure difference between the inside and outside of the vacuum space portion 130, it must have excellent strength.

In the case of simply making pipe-type connectors with thick steel plates to secure high strength and connecting them by welding, the strength may be sufficient, but the heat conduction through the connectors may significantly degrade the insulation performance.

In order to prevent this, as shown in FIG. 3, the side wall corrugation part 240 laminates a plurality of thin metal plates with holes therein, but sequentially welds the inner diameter and outer diameter parts to form a zigzag shape on the sidewall. It is desirable that it is made to achieve.

The shape of the side wall corrugation 240 may be referred to as a bellows type pipe, and it is preferable that at least a part of the side wall of the connection pipe 200 of the present invention is a bellows type pipe.

As described above, the side wall corrugation part 240 of the connector 200 is manufactured by sequentially welding the inner diameter part and the outer diameter part while stacking metal thin plates, and the side wall corrugation part 240 is again the upper pipe part ( 220) and the lower pipe portion 230 and the upper and lower portions thereof are welded and manufactured integrally.

The upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are each manufactured in the form of a circular pipe having a predetermined height, diameter, and thickness, and welded to the side wall corrugated part 240 to form a connection pipe 200. make up

The heights of the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 may be appropriately formed in consideration of the heights of the side wall corrugated part 240 and the vacuum space part 130 .

For example, when the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are welded to the outer case 120 and the inner case 110, as shown in FIG. The upper surface of the case 120 and the lower surface of the inner case 110 may be welded to protrude upward and downward, respectively.

Also, unlike this, when the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are welded to the outer case 120 and the inner case 110, as shown in FIG. 6, the The height of the upper surface of the outer case 120 and the lower surface of the inner case 110 may be matched so as not to protrude.

In addition, the height of the corrugated portion 240 on the side wall of the connection pipe 200 may be formed to match the height of the vacuum space portion 130 or may be formed smaller than that.

In FIG. 3 , the height of the sidewall corrugated portion 240 is shown to match the height of the vacuum space portion 130 , whereas in FIG. 6 , the height of the sidewall corrugated portion 240 is the same as the vacuum space portion 130 ) is formed smaller than the height of

The shape of the corrugated portion 240 on the side wall of the connector 200 is formed of a thin metal plate. The shape of the corrugated portion 240 on the side wall increases the strength of the thin metal plate, particularly the strength to withstand vacuum pressure in the radial direction. It is a structure capable of minimizing heat transfer by conduction by forming a very long path through which heat is conducted through the connection pipe 200 as well as being able to further increase the heat transfer.

In addition, communication ports 112 and 122 (see FIG. 6) are formed in advance in the inner case 110 and the outer case 120, respectively.

In the connection pipe 200, the upper pipe part 220 is welded to the communication hole 112 of the outer case 120 and the lower pipe part 230 is welded to the communication hole 122 of the inner case 110. and can be assembled.

In addition, the corrugated part 240 of the side wall of the connection pipe 200 may be manufactured by welding while laminating thin metal plates, but the upper pipe part 220, the side wall corrugated part 240 and the lower pipe part 230 may be manufactured. It may be integrally manufactured by a pressure molding method.

The connection pipe 200 manufactured in this way is shown in FIG. 4 .

The corrugated part 240 on the side wall of the connection pipe 200 is preferably made of a thin metal plate having a thickness of 0.05 to 0.2 mm.

Since the side wall wrinkles 240 must withstand vacuum pressure within the vacuum space, they can have sufficient strength when they are 0.05 mm or more.

In addition, since the side wall wrinkles 240 serve as a passage through which heat is transferred from the outer case 120 to the inner case 110 by conduction, it is preferable to have a thickness of 0.2 mm or less.

The upper pipe part 220 and the lower pipe part 230 may be formed thicker than the side wall corrugation part 240, but if proper strength can be maintained, it is preferable to form them not too thick to reduce heat transfer by conduction. will be.

On the other hand, the main body 1 is fixed to the first support plate 160 provided on at least one surface of the inner case 110 and the outer case 210 facing each other, and is disposed on the first support plate, It is preferable to further include a plurality of spacers 150 for supporting to maintain a gap between the case and the outer case.

As shown in FIG. 2 , in order for the vacuum space 130 between the inner case 110 and the outer case 120 to maintain its shape, the inner case 110 and the outer case 120 It is preferable that a plurality of spacers 150 are disposed between the inner case 110 and the outer case 120 to maintain a distance between them. The plurality of spacers 150 are arranged and supported so as to maintain a distance between the inner case 110 and the outer case 120 .

A plurality of spacers 150 are to be fixed between the inner case 110 and the outer case 120, and as a structure for fixing them, the plurality of spacers 150 are attached to the first support plate 160. It is integrally formed and placed in

The first support plate 160 may be provided to come into contact with any one of surfaces of the inner case 110 and the outer case 120 facing each other.

In FIG. 2 , the first support plate 160 is disposed to contact the outer surface of the inner case 110, but the first support plate 160 may be disposed to contact the inner surface of the outer case 120.

In addition, as will be described later with reference to FIGS. 5 and 6 , the first support plate 160 is disposed to contact the outer surface of the inner case 110 and is disposed to contact the inner surface of the outer case 120. Two support plates 170 may be further provided so that the spacer 150 of the first support plate 160 contacts the second support plate 170 .

Referring to the connection pipe 200 shown in FIG. 3 , the sidewall corrugated portion 240 may be formed to have a larger outer diameter than the distance between two adjacent spacers 150 .

However, as shown in FIG. 2 , the connector 200 may be arranged so as not to interfere with four adjacent spacers 150 .

That is, it is preferable that the connection pipe 200 be spaced apart from the spacers so as not to interfere with the plurality of spacers 150 .

In this way, the connection pipe 200 can be disposed between the first support plate 160 and the second support plate 170 on which the plurality of spacers 150 are disposed, and the connection pipe 200 Heat transfer to the spacer 150 may be minimized.

As shown in FIGS. 5 and 6, the main body 1 is provided on any other surface of the inner case 110 and the outer case 120 facing each other and disposed to face the first support plate. It is preferable to further include a second support plate 170 .

5 and 6, the second support plate 170 is disposed to contact the inner surface of the outer case 120, and the plurality of spacers 150 are fixed to the first support plate 160. It is disposed and supported to maintain a gap between the first support plate 160 and the second support plate 170 .

Since the first support plate 160 is in contact with the outer surface of the inner case 110 and the second support plate 170 is in contact with the inner surface of the outer case 120, the plurality of spacers 150 are After all, it is supported to maintain the distance between the inner case 110 and the outer case 120 .

In the case of the embodiment shown in FIGS. 5 and 6, the second support plate 170 is provided with a predetermined distance from the first support plate 160, but as shown in FIG. 2, the plurality of spacers 150 are integrated. Only the first support plate 160 fixedly disposed may be provided between the inner case 110 and the outer case 120.

In the case where the second support plate 170 is not present, ends of the plurality of spacers 150 may be disposed to directly contact the inner surface of the outer case 120 .

It will be appreciated that in FIG. 5, the connection pipe 200 is omitted for convenience.

In addition, as shown in the enlarged view of FIG. 5, the second support plate 170 preferably includes a plurality of grooves 175 formed on its inner surface so that the ends of the plurality of spaces 150 are inserted. .

The plurality of grooves 175 formed in the second support plate 170 are provided to the spacers 150 when the second support plate 170 is overlapped with the plurality of spaces 150 integrally formed in the first support plate 160. position relative to it is fixed.

In addition, it is preferable that the ends of the plurality of spacers 150 have a convex curved shape.

As shown in the enlarged circle of FIG. 5 , by forming the end of the spacer 150 in a convex curved shape, the end of each spacer 150 fits into the groove 175 formed in the second support plate 170 during assembly. Since it is easily seated, assembly work can be much easier.

In addition, it is more preferable that the plurality of grooves 175 of the second support plate 170 have a concave curved shape corresponding to the shape of the plurality of spacers 150 .

Since the plurality of grooves 175 of the second support plate 170 are formed in a shape corresponding to the shape of the plurality of spacers 150, not only is positioning easy during assembly, but also the second support plate 170 remains stable after assembly. It can be fixed so that it does not move in a direction parallel to its surface.

The connection pipe 200 is preferably welded to the inner case 110 and the outer case 120 through the first support plate 160 and the second support plate 170 , respectively.

Referring to FIG. 6 , communication holes 112 and 122 are formed in the inner case 110 and the outer case 120 so that the lower and upper portions of the connection pipe 200 can be welded.

That is, the outer surfaces of the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are connected to the communication hole 112 of the inner case 110 and the communication hole 122 of the outer case 120. are welded to each

In addition, communication holes 162 and 172 concentric with the connection pipe 200 are formed on the above-described first support plate 160 and the second support plate 170, respectively.

The communication ports 162 and 172 of the first support plate 160 and the second support plate 170 preferably have larger diameters than the communication ports 112 and 122 of the inner case 110 and the outer case 120. do.

The inner case 110 and the outer case 120 are made of steel, and the first support plate 160 and the second support plate 170 may be made of any one of metal, ceramic, and reinforced plastic.

Therefore, when the connecting pipe 200 is welded to the inner case 110 and the outer case 120, the first support plate 160 and the second support plate 170 are structures for supporting the plurality of spacers 150. ), it is preferable to form the communication holes 162 and 172 of the case larger than the communication holes 112 and 122 of the support plate.

Finally, it is preferable that the inner surface of the connection pipe 200 is coated with plastic to prevent corrosion.

The inner surface of the connection pipe 200 made of a thin metal plate may be corroded because liquid such as water or refrigerant may flow or external air may flow into the inner surface thereof.

Therefore, as shown in FIG. 7 , by forming a coating layer 260 of plastic or the like on the inner surface of the connection pipe 200 , corrosion can be prevented and durability can be improved.

According to the refrigerator having a vacuum space part of the present invention, a refrigerator having a connection pipe structure capable of withstanding vacuum pressure while drain or pipe passing through the vacuum space part is provided.

In addition, heat transfer through the connecting pipe can be minimized by making the sidewall of the connecting pipe into a corrugated bellows form.

In the above, preferred embodiments of the present invention have been described, but the scope of the present invention is not limited only to such specific embodiments, and those skilled in the art can properly within the scope described in the claims of the present invention. change will be possible.

1: body
4, 5: door
110: inner case
112: communication port
120: outer case
122: communication port
130: vacuum space
150: spacer
160: first support plate
162: communication port
170: second support plate
172: communication port
175: groove part
200: connector
220: upper pipe
230: lower pipe
240: side wall wrinkles
260: coating layer

Claims (16)

An inner case in which a storage space is formed to the inside;
an outer case in which the inner case is accommodated, the inner surface being spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface having an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage passing through at least a part of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connection pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space can pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has an inner space of the connecting pipe provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connecting pipe has a higher pressure than the vacuum space,
The inner space of the connecting pipe has the same pressure as the storage space or the inner space of the connecting pipe has the same pressure as the outer space,
The connection pipe includes a side wall positioned between the inner case and the outer case, and the side wall is manufactured so that an inner diameter portion and an outer diameter portion are sequentially coupled to form a zigzag side profile.
According to claim 1,
The inner diameter part and the outer diameter part are assembled by welding.
According to claim 1,
The connection pipe includes an upper pipe part and a lower pipe part connected to the side wall, and after the side wall is manufactured, the upper pipe part and the lower pipe part are assembled to the side wall, respectively.
According to claim 3,
The side wall and the upper pipe part or the side wall and the lower pipe part are assembled by welding.
According to claim 3,
After the upper pipe part and the lower pipe part are assembled to the sidewall, respectively, the upper pipe part and the lower pipe part are assembled to the outer case and the inner case, respectively.
According to claim 3,
The upper pipe part and the lower pipe part, when the upper pipe part and the lower pipe part are assembled with the outer case and the inner case, the heights of the upper surface of the outer case and the lower surface of the inner case are matched so that they do not protrude Refrigerator shaped.
According to claim 6,
The upper pipe part and the outer case, or the lower pipe part and the inner case are assembled by welding.
According to claim 3,
The upper pipe part and the lower pipe part, when the upper pipe part and the lower pipe part are assembled with the outer case and the inner case, are formed to protrude upward and downward from the upper surface of the outer case and the lower surface of the inner case, respectively refrigerator.
According to claim 8,
The upper pipe part and the outer case, or the lower pipe part and the inner case are assembled by welding.
According to claim 1,
The connection pipe includes an upper pipe part and a lower pipe part connected to the side wall, and the height of the side wall is equal to or smaller than the height of the vacuum space.
According to claim 1,
The connection pipe is formed to protrude more inward than the lower surface of the inner case and protrude outward more than the upper surface of the outer case, or is formed such that its height coincides with the lower surface of the inner case, and its height matches that of the upper surface of the outer case. Refrigerator formed to match.
According to claim 1,
The connection pipe includes an upper pipe part and a lower pipe part connected to the side wall, and the upper pipe part protrudes outward more than the upper surface of the outer case or is formed so that its height coincides with the upper surface of the outer case, or the lower part The refrigerator wherein the tube protrudes more inward than the lower surface of the inner case or is formed such that its height matches that of the lower surface of the inner case.
An inner case in which a storage space is formed to the inside;
an outer case in which the inner case is accommodated, the inner surface being spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface having an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage passing through at least a part of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connection pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space can pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has an inner space of the connecting pipe provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connecting pipe has a higher pressure than the vacuum space,
The inner space of the connecting pipe has the same pressure as the storage space or the inner space of the connecting pipe has the same pressure as the outer space,
The connection pipe includes a side wall positioned between the inner case and the outer case and an upper pipe part and a lower pipe part connected to the side wall, and after the side wall is manufactured, the upper pipe part and the lower pipe part are attached to the side wall. Refrigerators individually assembled.
According to claim 13,
The side wall and the upper pipe part or the side wall and the lower pipe part are assembled by welding.
According to claim 13,
After the upper pipe part and the lower pipe part are assembled to the sidewall, respectively, the upper pipe part and the lower pipe part are assembled to the outer case and the inner case, respectively.
An inner case in which a storage space is formed to the inside;
an outer case in which the inner case is accommodated, the inner surface being spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface having an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage passing through at least a part of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connection pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space can pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has an inner space of the connecting pipe provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connecting pipe has a higher pressure than the vacuum space,
The inner space of the connecting pipe has the same pressure as the storage space or the inner space of the connecting pipe has the same pressure as the outer space,
The connection pipe includes a side wall positioned between the inner case and the outer case, the height of the side wall is equal to or smaller than the height of the vacuum space, and the connection pipe includes an upper pipe portion and a lower portion connected to the side wall. A refrigerator comprising a tube.

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