KR20180057596A - A refrigerator comprising a vacuum space - Google Patents

Abstract

The present invention relates to a refrigerator including a vacuum space part and, more specifically, relates to a refrigerator forming a vacuum space part between inner and outer cases forming a main body to enhance insulation function of the refrigerator. According to the present invention, the refrigerator comprises a main body including a storage space to store a certain stored material. The main body includes: an inner case having the storage space formed inside; an outer case to receive the inner case, wherein an inner surface thereof is spaced apart from an outer surface of the inner case at a predetermined interval; a vacuum space part disposed between the inner and outer cases, wherein the inside thereof is closed to be maintained in a vacuum state, so as to perform insulation reaction between the inner and outer cases; and a liquid-gas heat exchanger disposed to form a long passage in the vacuum space part, and performing heat exchange between low temperature gaseous refrigerant passing an evaporator and room temperature liquid refrigerant before flowing into the evaporator.

Description

[0001] The present invention relates to a refrigerator having a vacuum space,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerator having a vacuum space, and more particularly, to a refrigerator capable of improving a heat insulation function of a refrigerator by forming a vacuum space between an outer case and an inner case.

A refrigerator is an electrical appliance that can store refrigerated or frozen storage by keeping the temperature of the storage room at the image or sub-zero temperature using a refrigerant cycle.

A general structure of a refrigerator includes a main body in which a storage space for storing a stored product is formed, and a door that is rotatably disposed or slidably disposed in the main body and opens and closes the storage space.

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

Such an insulation prevents the temperature inside the storage space from being affected by the external temperature.

As the heat insulating material, a urethane foam material is often used, and a liquid urethane is injected into a space between the inner case and the outer case to perform foam molding.

However, in order to realize the thermal insulation effect by using the heat insulating material, the thickness of the heat insulating material must be secured to some extent, which means that the thickness of the heat insulating material is correspondingly increased. Naturally, the wall thickness between the inner case and the outer case becomes thick, .

However, in recent years, there has been a tendency for the refrigerator to become compact, and a need has arisen for a structure capable of decreasing the size of the internal storage space, while reducing the size of the internal storage space.

Therefore, the present invention proposes a new structure of a refrigerator which does not inject heat insulating material between the inner case and the outer case of the refrigerator but forms a vacuum space part to insulate the refrigerator.

On the other hand, in a refrigerator, a defrosting device is provided which evaporates water vapor in a refrigerating cycle to form a frost.

The water melted by the defrosting device is connected to the outside of the refrigerator through a drain pipe. The drain pipe penetrates the inner case and the outer case and the heat insulating material therebetween and is connected to the outside.

In addition to such a drain pipe, a pipe may be connected to the outside from the inside of the refrigerator.

In the case of a refrigerator in which a foam material is provided in a space between a conventional inner case and an outer case, the pipe simply connects the pipe so as to penetrate the inner case, the heat insulating material and the outer case.

Thus, the pipe is simply made of plastic and is piped so as to pass through the inner case and the outer case, followed by foam molding of the heat insulating material.

However, in the case of the vacuum refrigerator of the present invention, since the piping is connected so as to pass through the vacuum space part, it is necessary to maintain the closed state of the vacuum space part. Therefore, when the plastic pipe is used, There is an unbearable problem.

In addition, in the case of forming the pipe by using a metal pipe which can be welded to the inner case and the outer case which are generally formed of steel plates, there is a problem that the heat insulating performance of the refrigerator is impaired due to heat transfer through the pipe.

SUMMARY OF THE INVENTION The present invention is conceived to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a refrigerator capable of increasing a heat insulation effect by forming a vacuum space between an inner case and an outer case, have.

Another object of the present invention is to provide a refrigerator having a support structure in which a vacuum space is formed between an inner case and an outer case so that the inner case and the outer case are not deformed by an external impact but can maintain the gap.

Also, the present invention provides a refrigerator having a structure in which a liquid-gas heat exchanger is disposed in the vacuum space, thereby minimizing deterioration of heat insulating performance.

According to an aspect of the present invention, there is provided a refrigerator including a main body having a storage space in which a predetermined storage can be received, the main body including: an inner case having the storage space formed therein; An outer case in which the inner case is accommodated and the inner surface of the outer case is spaced apart from the outer surface of the inner case by a predetermined distance; A vacuum space part provided between the inner case and the outer case, the vacuum space part being sealed and kept in a vacuum state to perform a thermal insulation action between the inner case and the outer case; And a liquid-gas interchanger arranged to form a long flow path in the vacuum space and causing heat exchange between the low-temperature gas refrigerant flowing through the evaporator and the liquid refrigerant at room temperature before flowing into the evaporator, do.

The main body includes a first support plate provided on one of surfaces of the inner case and the outer case facing each other, and a second support plate provided on any other surface of the inner case and the outer case, And a plurality of spacers which are fixed to the first support plate and support the spacing between the inner case and the outer case.

The second support plate may include a plurality of grooves formed on an inner surface of the second support plate so as to insert the ends of the plurality of spaces.

The plurality of spacers are preferably arranged in a plurality of rows in the top, bottom, left and right directions.

The liquid-gas heat exchanger is preferably arranged so as not to be in contact with the plurality of spaces.

The liquid-gas heat exchanger is welded such that a compressor suction pipe through which the low-temperature gas refrigerant passing through the evaporator flows to the compressor and a capillary through which the liquid refrigerant flows at the room temperature before the refrigerant flows into the evaporator come into contact with each other, It is preferable that both end portions are welded to each other.

The liquid-gas heat exchanger is preferably disposed so as to be spaced apart from the inner case and the outer case, except for welds at both ends of the liquid-gas heat exchanger.

The main body may further include a plurality of guide rings arranged to surround the liquid-gas heat exchanger and supporting the liquid-gas heat exchanger so as to be spaced apart from the inner case and the outer case.

The liquid-gas heat exchanger may be made of a copper material, and the guide ring may be made of ceramic or polycarbonate.

The liquid-gas heat exchanger is preferably welded to the inner case and the outer case at positions where the capillary and the compressor suction pipe are spaced apart from each other at both ends welded to the inner case and the outer case.

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

Since the heat insulating effect in a vacuum state is remarkably superior to the heat insulating effect by a usual heat insulating material, the refrigerator according to the present invention has an advantage that it has better heat insulation than a conventional refrigerator.

On the other hand, in the case of the vacuum space part, heat is maintained if it is maintained in a vacuum state regardless of its thickness (the distance between the inner case and the outer case). However, in the case of ordinary heat insulation material, the thickness of the heat insulation material must be increased to increase the heat insulation effect. The increase in thickness will lead to an increase in the size of the refrigerator.

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

Further, the liquid-gas heat exchanger is disposed in the vacuum space portion, and the heat transfer performance through the liquid-gas heat exchanger is minimized.

1 is a perspective view showing an example of a refrigerator according to the present invention.
2 is a schematic diagram illustrating the function of a liquid-gas heat exchanger in the refrigeration cycle of a refrigerator;
3 is a Mollier diagram illustrating the function of a liquid-gas heat exchanger.
4 is a partially cut-away perspective view showing that a liquid-gas heat exchanger is provided in a vacuum space part between an inner case and an outer case in a refrigerator according to the present invention.
5 is a partially cutaway perspective view showing an inner case, an outer case, a spacer therebetween, and an assembly structure thereof.

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.

1, a refrigerator according to the present invention includes a main body 1 having a storage chamber, a first door 4 rotatably disposed on the left side of the main body 1, And a second door 5 rotatably provided on the right side of the second door 5.

Here, the first door 4 functions to open and close the freezing room in the storage room, and the second door 5 functions to open and close the refrigerator room in the storage room. However, the present invention is not limited to the refrigerator having such a structure.

That is, the refrigerator of FIG. 1 is a so-called side-by-side type refrigerator in which a freezing chamber is disposed on the left side and a refrigerating chamber is disposed on the right side. In the refrigerator of the present invention, It can be applied to refrigerator. It goes without saying that the present invention may be applied to a refrigerator including a refrigerator or a freezer only, and a refrigerator including a separate refrigerator in addition to a refrigerator and a freezer.

The outer case 120 and the inner case 110 are spaced apart from each other. In this space, no separate heat insulating material is disposed, but only a vacuum state is maintained to perform a heat insulating action.

That is, a vacuum space part 130 is formed between the outer case 120 and the inner case 110 so that the medium that mediates the heat transfer between the inner case 110 and the outer case 120 is removed .

Thus, the heat of the hot air outside the outer case 120 can be prevented from being transmitted to the inner case 110 and the inside thereof.

1, the inner case 110, the outer case 120, and the spacers 150 constituting the main body of the liquid-gas heat exchanger 200 are omitted.

2 and 3, the liquid-gas heat exchanger 200 provided in the vacuum space portion of the refrigerator of the present invention will be described.

2 is a schematic diagram illustrating the function of a liquid-gas heat exchanger in the refrigeration cycle of a refrigerator, and in Fig. 3 a Moliert line (Pi diagram or pressure-enthalpy diagram) illustrating the function of the liquid- .

The cooling cycle refers to a refrigerant circulation cycle in which refrigerant exchanges heat with outside air while passing through a compressor, an evaporator, an expansion valve, and an evaporator to supply cold air.

As shown in FIG. 2, the refrigerant vaporized in the evaporator 40 flows into the compressor 10, is compressed, and then condensed in the condenser 20 to be in a liquid state. The refrigerant in the liquid state is expanded while passing through the expansion valve (30), and evaporates in the evaporator, absorbing the heat of the ambient air to generate cool air.

In order to precisely overheat the refrigerant gas while supercooling the refrigerant discharged from the condenser 20 in a refrigeration apparatus such as a refrigerator, a liquid-gas interchanger 200 is installed as shown in FIG. There is a time.

If the refrigerant in the liquid state, that is, the refrigerant liquid is almost saturated, there is a pressure drop due to the resistance during passage through the refrigerant pipe, a decrease in fluid pressure due to the rise of the liquid pipe, So that a flash gas may be generated in the refrigerant liquid. As a result, the piping resistance is remarkably increased, and in particular, the capacity of the expansion valve is largely reduced, thereby greatly reducing the refrigeration capacity.

Therefore, the refrigerant liquid is supercooled so that this does not occur. That is, in FIG. 3, the refrigerant liquid near the saturation state from the condenser in the state of (3) is supercooled to the state of (4).

With this super-cooling, the refrigerant fluid is further cooled by _a Δi is the refrigeration effect as _a Δi increases when vaporized in evaporator refrigerant fluid through the expansion valve, as can be seen from the Moliere chart of FIG.

In the state where the refrigerant having a boiling point corresponding to the type of the evaporator enters the suction pipe, it is not necessarily completely saturated vapor state, and the refrigerant is liable to be sucked in a state in which the liquid particles remain ), And may be sucked into the state of humid vapors depending on the operating conditions. In this case, the liquid-gas heat exchanger 200 is used to increase the superheating degree of the intake gas.

In addition, in the case of the monolithic evaporator, since the refrigerant and the lubricant are mixed in the evaporator, the liquid level may be maintained at a relatively high level so that the refrigerant and the refrigerant are sucked into the suction pipe.

In such a case, the liquid-gas heat exchanger 200 is used to heat the refrigerant so that it is sucked into the suction pipe at an appropriate superheat, separates the oil from the refrigerant, and returns to the compressor through the suction pipe

As shown in the diagram of Figure 3, the refrigerant exiting the evaporator 40 is the liquid gajina the enthalpy such as ① - goes through a gas heat exchanger 200 to superheat the increase is the same state as ② Δi _b So that the enthalpy can be introduced into the compressor.

Therefore, in the refrigerator of the present invention, in order to increase the cooling efficiency of the cooling cycle by supercooling the refrigerant liquid to the expansion valve 30 and overheating the refrigerant gas sucked into the compressor 10, the liquid-gas heat exchanger 200 .

Hereinafter, the structure of the main body 1 including the liquid-gas heat exchanger 200 in the refrigerator of the present invention will be described in detail with reference to FIGS. 4 and 5. FIG.

4 is a partially cut-away perspective view showing a liquid-gas heat exchanger in a vacuum space between an inner case and an outer case in a refrigerator according to the present invention, and FIG. 5 shows the inner case, the outer case, And a partially cutaway perspective view showing the assembly structure thereof.

In FIG. 4, the outer case 120 is opaque, so that the interior of the vacuum space 130 is not visible.

In the refrigerator of the present invention, the main body (1) comprises: an inner case (110) in which the storage space is formed 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 vacuum space part (130) being hermetically sealed and kept in a vacuum state to perform a thermal insulation action between the inner case and the outer case; And a liquid-gas interchanger 200 arranged to form a long flow path in the vacuum space and causing heat exchange between the low-temperature gas refrigerant flowing through the evaporator and the liquid refrigerant at room temperature before flowing into the evaporator .

In the case of a refrigerator in which a foam material is provided in a vacuum space between a conventional inner case and an outer case, it is sufficient that the liquid-gas heat exchanger is embedded in the foam material so that the capillary and the compressor suction pipe are welded in long contact.

However, in the case of the refrigerator having the vacuum space part of the present invention, both ends of the pipe of the liquid-gas heat exchanger 200 must be welded to the inner case 110 and the outer case 120 in order to withstand the vacuum pressure There are restrictions.

Since the liquid-gas heat exchanger is made of a metal material, a pipe made of a metal material may be inserted into the inner case 110, the outer case 120, or other parts in the vacuum space part 130 in order to minimize heat conduction therethrough. It is desirable to minimize the contact with the electrode.

4 and 5, in order to maintain the shape of the vacuum space part 130 between the inner case 110 and the outer case 120, the inner case 110 and the outer case 120, A plurality of spacers 150 for maintaining a gap between the inner case 110 and the outer case 120 are preferably disposed between the inner case 110 and the outer case 120. A plurality of spacers 150 are disposed and supported to maintain a distance between the inner case 110 and the outer case 120.

A plurality of spacers 150 may be fixed between the inner case 110 and the outer case 120. The plurality of spacers 150 may be fixed to the first support plate 160, As shown in Fig.

The first support plate 160 may be disposed on one of surfaces of the inner case 110 and the outer case 120 facing each other.

4 and 5, the first support plate 160 is disposed to be in contact with the outer surface of the inner case 110, but the first support plate 160 is disposed to be in contact with the inner surface of the outer case 120 It is possible.

The first support plate 160 may further include a second support plate 170 disposed to be in contact with the outer surface of the inner case 110 and disposed to contact the inner surface of the outer case 120, The end of the spacer 150 of the first support plate 160 may contact the inner surface of the second support plate 170.

5, the main body 1 is provided on one of opposite surfaces of the inner case 110 and the outer case 120 so as to face the first supporting plate 160. In other words, And a second support plate (170) disposed thereon.

5, the second support plate 170 is disposed to be in contact with the inner surface of the outer case 120, and the plurality of spacers 150 are fixedly disposed on the first support plate 160, 1 to support the gap between the 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, So that the gap between the inner case 110 and the outer case 120 is maintained.

4, the end portions of the plurality of spacers 150 may be arranged to directly contact the inner surface of the outer case 120 when the second support plate 170 is not provided.

5, the second support plate 170 preferably includes a plurality of grooves 175 formed on the inner surface thereof so as to insert the ends of the plurality of spaces 150 .

The plurality of grooves 175 formed in the second support plate 170 are spaced apart from the spacers 150 when the second support plate 170 is placed in a plurality of spaces 150 formed integrally with the first support plate 160 So that the relative position is fixed.

The inner case 110 and the outer case 120 constituting the main body 1 have to be formed with a vacuum space 130 therebetween. For example, the inner case 110, which forms one side of the main body 1, 110 and the outer case 120 should be formed integrally with each other to have a size corresponding to the size of one side thereof.

The first support plate 160 and the second support plate 170 may be formed to have a predetermined size smaller than that of the inner case 110 and the outer case 120, A plurality of support plates 170 are assembled by inserting the spacers 150 between the inner case 110 and the outer case 120 and assembled.

Of course, the first support plate 160 and the second support plate 170 may be fabricated to have the same size as the inner case 110 and the outer case 120 and assembled.

FIG. 5 shows only a part of the inner case 110 and the outer case 120 in a stacked structure in order to show the assembly structure between the inner case 110 and the outer case 120. FIG.

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

5, when the ends of the spacers 150 are formed in a convex curved shape, the ends of the spacers 150 are assembled to the groove portions 175 formed in the second support plate 170 The assembly operation can be much easier since it is easily seated.

It is further 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, the positioning of the second support plate 170 can be facilitated during assembly, It can be fixed so as not to move in a direction parallel to the surface.

The plurality of spacers 150 are preferably arranged in a plurality of rows in the vertical and horizontal directions.

4 and 5, the plurality of spacers 150 integrally formed on the first support plate 160 are arranged in rows in the up-and-down direction and in the left-right direction.

By arranging the plurality of spacers 150 in a plurality of rows in this manner, it is easy to design and form a mold, and assembly work is easy, and the strength to withstand vacuum pressure or external impact in the vacuum space part 130 after assembly It can be bigger.

Referring back to FIG. 4, the mounting structure of the liquid-gas heat exchanger 200 will be described in detail.

The liquid-gas heat exchanger 200 is preferably disposed between the plurality of spaces 150 so as not to be in contact with the plurality of spaces 150.

The liquid-gas heat exchanger 200 is disposed in the vacuum space part 130 and both ends of the liquid-gas heat exchanger 200 are welded to the inner case 110 and the outer case 120, respectively. Are mounted so as not to come in contact with or interfere with a plurality of spaces 150 arranged in the vacuum space part 130.

Accordingly, the heat outside the outer case 120 can be prevented from being conducted to the inside of the inner case 110 through the liquid-gas heat exchanger 200 and the spacer 150 by conduction.

The liquid-gas heat exchanger 200 includes a compressor suction pipe 220 through which the low-temperature gas refrigerant passes through the evaporator 40 to the compressor 10, and a capillary tube 220 through which the liquid refrigerant at room temperature flows before entering the evaporator. The inner case 110 and the outer case 120 are welded to each other so that both ends thereof are welded to the inner case 110 and the outer case 120, respectively.

4, the compressor suction pipe 220 is formed to have a larger diameter than the capillary tube 210, which is a refrigerant tube through which the low-temperature gas refrigerant passing through the evaporator 40 flows to the compressor 10 have.

The capillary tube 210 is a refrigerant tube through which a liquid refrigerant at room temperature flows before being introduced into an evaporator, and is formed to have a relatively small diameter as compared with the compressor suction pipe 220.

Types of liquid-gas heat exchangers include shell-and-tube type, tube-contact type and double-tube type liquid-gas heat exchanger depending on the type of connection of the compressor suction pipe and the capillary or the whole type.

The liquid-gas heat exchanger 200 used in the present invention is preferably a tube-contact type liquid-gas heat exchanger, in which the compressor suction pipe 220 and the capillary tube 210 are welded so as to be in contact with each other, Do.

This is because the vacuum space 130 in which the liquid-gas heat exchanger 200 is mounted is relatively thin and has a large area.

The two ends 222 of the liquid-gas heat exchanger 200 are disposed at predetermined positions. In order to form a flow passage longer than the linear distance, the liquid-gas heat exchanger 200 is connected to the S- .

Therefore, the liquid-gas heat exchanger 200 may be referred to as an "S-pipe"

4, one end 222 of the liquid-gas heat exchanger 200 is welded to the communication port 122 formed in the outer case 120, and the liquid-gas heat exchanger 200 Is welded to a communication hole (not shown) formed in the inner case 110 in advance.

A portion of the first support plate 160 where one end portion 222 of the liquid-gas heat exchanger 200 is welded to the inner case 110 is provided with a communication hole 162 are preferably formed.

In FIG. 4, only the first support plate 160 is provided and the second support plate 170 is not provided. When the second support plate 170 is provided as shown in FIG. 5, the liquid-gas heat exchanger 200 The other end 222 of the outer case 120 is welded to the outer case 120, and a communication hole having a larger diameter and concentric with the other end 222 is formed.

The inner case 110 and the outer case 120 may be made of steel and the first and second support plates 160 and 170 may be made of metal, ceramics or reinforced plastic.

When the liquid-gas heat exchanger 200 is welded to the inner case 110 and the outer case 120, the first supporting plate 160 and the second supporting plate 160, which are structures for supporting the plurality of spacers 150, It is preferable that the communication hole 162 of the case is formed to be larger than the communication hole 122 of the support plate.

As described above, the liquid-gas heat exchanger 200 is preferably spaced apart from the inner case 110 and the outer case 120, except for welds at both ends of the liquid-gas heat exchanger 200.

This is because when the liquid-gas heat exchanger 200 made of metal is in contact with the inner case 110 or the outer case 120, or the first support plate 160 or the second support plate 170, So that heat insulating performance may be deteriorated.

In order to prevent this, the main body 1 is disposed so as to surround the liquid-gas heat exchanger 200 and supports the liquid-gas heat exchanger so as to be spaced apart from the inner case 110 and the outer case 120 It is preferable to further include a plurality of guide rings 250.

The plurality of guide rings 250 are formed in a ring shape surrounding the liquid-gas heat exchanger 200, that is, the compressor suction pipe 220 and the capillary tube 210, which are joined to each other.

The guide ring 250 separates the liquid-gas heat exchanger 200 from the inner case 110 and the outer case 120 by a predetermined distance.

When the first support plate 160 and the second support plate 170 are provided, the guide ring 250 prevents the liquid-gas heat exchanger 200 from being separated from the first support plate 160 and the second support plate 170, 2 support plate 170 so that they do not come into contact with each other.

The plurality of guide rings 250 are arranged at predetermined intervals according to the length of the liquid-gas heat exchanger 200 so that the liquid-gas heat exchanger 200 is disposed in the vacuum space part 130, And the supporting plate.

It is preferable that the guide ring 250 has an inner circumferential surface shape corresponding to the outer circumferential surface shape since the liquid-gas heat exchanger 200 is formed by joining two pipes having different diameters.

4, the guide ring 250 may have a different shape as long as it can support the liquid-gas heat exchanger 200 so as to be spaced apart from the surrounding case or the support plate. There will be.

The liquid-gas heat exchanger 200 is preferably made of a copper material having a high thermal conductivity because heat exchange must be actively performed.

Since both end portions of the liquid-gas heat exchanger 200 made of copper material can be welded to the inner case and the outer case, which are generally made of a stainless steel plate, The airtightness can be maintained.

Both end portions of the liquid-gas heat exchanger 200 are welded to the inner case 110 and the outer case 120, respectively, and eventually pass through the vacuum space portion 130. However, Since the length of the heat exchanger 200 is considerably long, the amount of heat transferred through the liquid-gas heat exchanger 200 made of copper is insignificant, so that the heat insulating performance is not significantly deteriorated.

The guide ring 250 is preferably made of a ceramic material or polycarbonate (PC).

Since the guide ring 250 separates the liquid-gas heat exchanger 200 from the surrounding case or the support plate, the guide ring 250 may be formed of a ceramic or polycarbonate material having a low thermal conductivity, thereby minimizing heat transfer therethrough.

The liquid-gas heat exchanger 200 is disposed at a position where the capillary tube 210 and the compressor suction tube 220 are spaced from each other at both ends welded to the inner case 110 and the outer case 120, The inner case 110 and the outer case 120 are welded to each other.

4, a capillary 210 of the liquid-gas heat exchanger 200 and a compressor suction pipe 220 are welded to predetermined portions of the outer case 120, Spheres 122 and 123 are formed.

The first communication hole 122 of the two communication holes 122 and 123 is welded to the end of the compressor suction pipe 220 and the second communication hole 123 is welded to the capillary tube 210.

Since the diameter of the compressor suction pipe 220 is larger than the diameter of the capillary tube 210, the first communication hole 122 is formed to be larger than the second communication hole 123.

4, it can be seen that the capillary 210 and the compressor suction pipe 220 are welded to each other at the other end of the liquid-gas heat exchanger 200.

According to the present invention, a vacuum space having a thickness thinner than a conventional one is formed between an inner case and an outer case, thereby providing a refrigerator having a relatively large capacity of a storage compartment and a better heat insulating performance.

In addition, when installing a liquid-gas heat exchanger for improving the cooling efficiency in the cooling cycle in the vacuum space, the refrigerator is easy to assemble without affecting the heat insulating performance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Changes will be possible.

1: Body
4, 5: Door
10: Compressor
20: condenser
30: Expansion valve
40: evaporator
110: inner case
120: outer case
122: first communicating hole
123: Second communicating port
130: Vacuum space part
150: Spacer
160: first support plate
162:
170: second support plate
175: Groove
200: liquid-gas heat exchanger
210: capillary tube
213: end
220: compressor suction pipe
222: end

Claims (20)

A body having a storage space in which a predetermined storage can be accommodated,
The main body includes:
An inner case in which the storage space is formed inside;
An outer case in which the inner case is accommodated and the inner surface of the outer case is spaced apart from the outer surface of the inner case by a predetermined distance;
A vacuum space part provided between the inner case and the outer case, the vacuum space part being sealed and kept in a vacuum state to perform a thermal insulation action between the inner case and the outer case;
A support structure positioned inside the vacuum space formed between the inner case and the outer case and configured to maintain a gap between the inner case and the outer case; And
A liquid-gas heat exchanger (not shown) disposed between the inner case and the outer case so as to form a long flow path parallel to the inner case or the outer case and causing heat exchange between the low-temperature gas refrigerant passing through the evaporator and the liquid refrigerant at room temperature before entering the evaporator liquid-gas interchanger,
The support structure includes:
A first support plate provided on one of surfaces of the inner case and the outer case facing each other; And
And a plurality of spacers fixedly disposed on the first support plate and supporting the inner case and the outer case so as to maintain an interval therebetween,
And a guide for supporting the liquid-gas heat exchanger in the vacuum space part by separating the liquid-gas heat exchanger from the inner case, the outer case, and the first support plate. The method according to claim 1,
Wherein the guide is adapted to receive the liquid-gas heat exchanger. 3. The method of claim 2,
Wherein the guide is fitted with the liquid-gas heat exchanger, or the guide surrounds the liquid-gas heat exchanger. The method according to claim 1,
Wherein the support structure is manufactured as a unit body having a predetermined size smaller than the inner case and the outer case, and is positioned between the inner case and the outer case. The method according to claim 1,
Wherein the liquid-gas heat exchanger is positioned between the inner case and the outer case together with the support structure after being coupled with the support structure. 6. The method according to any one of claims 1 to 5,
Wherein the liquid-gas heat exchanger is arranged between the plurality of spacers so as not to contact each other. 6. The method according to any one of claims 1 to 5,
Wherein the liquid-gas heat exchanger is spaced apart from the inner case and the outer case except for both ends. 8. The method of claim 7,
Wherein both ends of the liquid-gas heat exchanger are respectively welded to a communication hole of the inner case and a communication hole of the outer case. 6. The method according to any one of claims 1 to 5,
Wherein the support structure includes a second support plate disposed on one of opposite surfaces of the inner case and the outer case facing each other and facing the first support plate,
Wherein the guide supports the liquid-gas heat exchanger apart from the first support plate and the second support plate. 10. The method of claim 9,
The first support plate is formed with a first support plate communication hole formed to penetrate the liquid-gas heat exchanger and having a larger diameter than a communication hole of the inner case,
Wherein the second support plate is formed with a second support plate communication hole formed to penetrate the liquid-gas heat exchanger and having a larger diameter than a communication hole of the outer case. 10. The method of claim 9,
Wherein the support structure is inserted between the inner case and the outer case after the first support plate and the second support plate are assembled to abut against each other with the spacer interposed therebetween to form a set. 12. The method of claim 11,
Wherein the spacer is integrally formed with the first support plate,
Wherein the second support plate includes a groove portion formed in an inner surface of the second support plate so as to insert an end of the spacer. A body having a storage space in which a predetermined storage can be accommodated,
The main body includes:
An inner case in which the storage space is formed inside and a communication hole is formed;
An outer case in which the inner case is accommodated and the inner surface of the outer case is spaced apart from the outer surface of the inner case by a predetermined distance and a communication hole is 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 vacuum space part being sealed and kept in a vacuum state to perform a thermal insulation action between the inner case and the outer case;
A support structure positioned inside the vacuum space formed between the inner case and the outer case and configured to maintain a gap between the inner case and the outer case; And
And a liquid-gas interchanger arranged to form a long flow path in the vacuum space and causing heat exchange between the low temperature gas refrigerant passing through the evaporator and the liquid refrigerant at room temperature before being introduced into the evaporator,
The support structure includes:
A first support surface contacting one of surfaces of the inner case and the outer case facing each other;
A second supporting surface contacting the other surface of the inner case and the outer case facing each other; And
And a spacer provided between the first support surface and the second support surface to support the gap between the inner case and the outer case,
And a guide provided in the vacuum space part and supporting the liquid-gas interchanger apart from the outer surface of the inner case or the inner surface of the outer case. 14. The method of claim 13,
Wherein the liquid-gas heat exchanger is arranged to form a long flow path parallel to the first support surface and the second support surface. 15. The method of claim 14,
Wherein the guide is formed to surround the liquid-gas heat exchanger. 16. The method of claim 15,
Wherein the guide is configured to receive the liquid-gas heat exchanger. 15. The method of claim 14,
Wherein the guide is a circular ring-shaped guide ring. 18. The method according to any one of claims 13 to 17,
Wherein the support structure is manufactured as a unit body having a predetermined size smaller than the inner case and the outer case, and is positioned between the inner case and the outer case. 18. The method according to any one of claims 13 to 17,
Wherein both end portions of the liquid-gas heat exchanger are respectively welded to a communication hole of the inner case and a communication hole of the outer case, in order to maintain airtightness to withstand a vacuum pressure. 18. The method according to any one of claims 13 to 17,
Wherein the liquid-gas heat exchanger is positioned between the inner case and the outer case together with the support structure after being coupled with the support structure.

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