KR20200015658A - A refrigerator comprising a vacuum space - Google Patents

Abstract

The present invention relates to a refrigerator including a vacuum space part and, more specifically, to a refrigerator capable of improving insulation performance of a refrigerator by forming a vacuum space part between external and internal cases forming a main body. The refrigerator includes a main body having a storage space to store a predetermined storage material. The main body includes: an internal case; an external case; a vacuum space part; a support structure installed to keep a gap of the vacuum space part; and a liquid-gas interchanger causing a heat interchange. The refrigerator includes a guide installed in the vacuum space part to support the liquid-gas interchanger at a distance from the outer surface of the internal case or the inner surface of the external case. One end of the liquid-gas interchanger is combined with a connection port which is pre-formed on the external case, and the other end of the liquid-gas interchanger is combined with a connection port which is pre-formed on the internal case.

Description

A refrigerator comprises a vacuum space

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

A refrigerator is an electric product that can store or store a stored product in a refrigerated or frozen state by maintaining a temperature of a storage room at an image or sub-zero temperature using a refrigerant cycle.

The general configuration of the refrigerator includes a main body in which a storage space for storing a storage is formed, and a door disposed in the main body so as to be rotatable or slidably movable 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 an insulating material is disposed between the inner case and the outer case.

By this heat insulating material, it is suppressed that the temperature in the storage space is affected by the external temperature.

The urethane foam is used a lot as the heat insulating material, the liquid urethane is injected into the space between the inner case and the outer case and foamed.

However, in order to realize the heat insulation effect using the heat insulating material, the thickness of the heat insulating material must be secured to some extent, which means that the heat insulating material is thickened, and the wall thickness between the inner case and the outer case is naturally thickened, so that the size of the refrigerator It becomes bigger.

However, in recent years, the trend toward the compactness of the refrigerator has emerged, and the necessity of a structure capable of reducing the external size while increasing the volume of the internal storage space has emerged.

Therefore, the present invention proposes a refrigerator having a new structure to insulate by forming a vacuum space rather than insulated between the inner case and the outer case of the refrigerator.

On the other hand, the refrigerator is provided with a defrosting device for heating and making water by removing water vapor is cooled to the evaporator constituting the refrigeration cycle is frost.

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

In addition, the pipe may be connected to the outside from the refrigerator in addition to the drain pipe.

In the case of a refrigerator having a foam member in a space between a conventional inner case and an outer case, the pipe simply connected to the inner case, the heat insulating material and the outer case.

Thus, the pipe was simply piped through the inner case and the outer case molded from plastic and then foamed the insulation.

However, in the case of the vacuum refrigerator of the present invention, while the pipe is connected to pass through the vacuum space portion, it is necessary to maintain the sealed state of the vacuum space portion, when the plastic pipe is used, it is not only difficult to seal the connection portion but also to maintain the vacuum pressure of the vacuum space portion. There is an unbearable problem.

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

The present invention has been made to solve the above-mentioned problems, the purpose of providing a refrigerator that can increase the heat insulating effect, while compacting the outer volume by forming a vacuum space between the inner case and the outer case. have.

In addition, while a vacuum space is formed between the inner case and the outer case to provide a refrigerator having a support structure that can maintain the gap between the inner case and the outer case is not deformed by an external impact.

In addition, the present invention is to provide a refrigerator having a structure that can minimize the degradation of the thermal insulation performance through the liquid-gas heat exchanger in the vacuum space.

The refrigerator of the present invention for achieving the above object comprises a main body having a storage space in which a predetermined storage can be accommodated, the main body comprising: an inner case in which the storage space is formed; An outer case accommodating the inner case, the inner surface of the inner case being 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 inside of which is sealed and maintained in a vacuum state to perform a heat insulating action between the inner case and the outer case; It is arranged to form a long flow path in the vacuum space portion, characterized in that it comprises a liquid-gas heat exchanger (liquid-gas exchanger) for causing heat exchange between the low-temperature gas refrigerant and the liquid refrigerant at room temperature before entering the evaporator do.

The main body may include a first support plate provided on one surface of the inner case and an outer case facing each other, and provided on any other surface of the inner case and the outer case facing each other to face the first support plate. It is preferable to further include a second support plate to be disposed, and a plurality of spacers fixed to the first support plate to support to maintain the gap between the inner case and the outer case.

Preferably, the second support plate includes a plurality of grooves formed to insert end portions of the plurality of spaces on inner surfaces thereof.

It is preferable that the plurality of spacers are arranged in a plurality of rows vertically and horizontally.

The liquid-gas heat exchanger is preferably configured to be disposed therebetween so as not to contact the plurality of spaces.

The liquid-gas heat exchanger is welded such that the compressor suction pipe through which the low-temperature gas refrigerant flowing through the evaporator flows into the compressor and the capillary tube through which the liquid refrigerant at room temperature flows before being introduced into the evaporator are in contact with each other. It is preferable that both ends are welded to each other.

The liquid-gas heat exchanger may be disposed to be spaced apart from the inner case and the outer case, respectively, except for welds at both ends thereof.

The main body may further include a plurality of guide rings disposed to surround the liquid-gas heat exchanger to support the liquid-gas heat exchanger to be spaced apart from the inner case and the outer case, respectively.

The liquid-gas heat exchanger is made of copper, and the guide ring is preferably 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 tube and the compressor suction tube are spaced apart from each other at both ends welded to the inner case and the outer case.

According to the above-described refrigerator of the present invention of the present invention, a vacuum space portion which is not a normal heat insulating material is formed between the inner case and the outer case, and the heat insulation between the inner case and the outer case is suppressed by the vacuum space portion. Work is done.

Since the thermal insulation effect in the vacuum state is remarkably superior to the thermal insulation effect by the conventional thermal insulator, the refrigerator according to the present invention has the advantage that the thermal insulation is superior to the conventional refrigerator.

On the other hand, in the case of the vacuum space portion, the insulation is maintained as long as the vacuum state is maintained irrespective of its thickness (gap between the inner case and the outer case), but in the case of a normal insulation material, in order to increase the insulation effect, the thickness of the insulation material must be thickened. The increase in thickness leads to the 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 compared with the conventional refrigerator, thereby contributing to the compactness of the refrigerator.

In addition, by arranging the liquid-gas heat exchanger in the vacuum space portion by minimizing the heat transfer through it is very excellent thermal insulation performance.

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 a cooling cycle of a refrigerator.
3 is a Moliere diagram illustrating the function of a liquid-gas heat exchanger.
4 is a partial cutaway perspective view showing that the liquid-gas heat exchanger is provided in the vacuum space between the inner case and the outer case in the refrigerator according to the present invention.
5 is a partially cutaway perspective view illustrating an inner case and an outer case, a spacer therebetween, and an assembly structure thereof;

Hereinafter, exemplary 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.

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 the.

Here, the first door 4 opens and closes the freezer compartment in the storage compartment, and the second door 5 functions to open and close the refrigerator compartment in the storage compartment, but 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 freezer compartment is disposed on the left side and a refrigerator compartment is disposed on the right side, but the refrigerator of the present invention is any type of refrigerator and freezer compartment. It can be applied to the refrigerator. In addition, in addition to the refrigerator or a freezer compartment and a freezer compartment provided with only a refrigerating compartment or a freezing compartment, the present invention may be applied to a refrigerator further comprising a separate cooling compartment.

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

That is, since the vacuum space 130 is formed between the outer case 120 and the inner case 110, the medium that mediates heat transfer between the inner case 110 and the outer case 120 is removed. Keep it.

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

Meanwhile, FIG. 1 illustrates the inner case 110, the outer case 120, and the spacer 150 constituting the main body with the liquid-gas heat exchanger 200 omitted later for convenience.

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 shows a schematic diagram illustrating the function of the liquid-gas heat exchanger in the cooling cycle of the refrigerator, and FIG. 3 shows a Moliere diagram (Pi diagram or pressure-enthalpy diagram) illustrating the function of the liquid-gas heat exchanger. It is.

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

As shown in FIG. 2, the vaporized refrigerant in the evaporator 40 is introduced into the compressor 10, compressed, and then condensed in the condenser 20 to become a liquid state. The liquid refrigerant is expanded through the expansion valve 30, and then vaporized in the evaporator to absorb the heat of the ambient air to generate cold air.

However, in order to supercool the refrigerant liquid leaving the condenser 20 in a refrigerating device such as a refrigerator and to overheat the refrigerant gas accurately, a liquid-gas exchanger 200 is installed as shown in FIG. 2. There is a time.

When the liquid refrigerant, i.e., the refrigerant liquid, is almost saturated, there is a pressure drop due to the resistance during the passage of the refrigerant pipe, a decrease in the liquid pressure due to the standing of the liquid pipe, or a heat invasion due to the high ambient temperature. As a result, flash gas may be generated in the refrigerant liquid. This significantly increases the pipe resistance, and in particular, greatly reduces the capacity of the expansion valve to significantly reduce the freezing capacity.

Thus, the coolant liquid is subcooled so that this does not occur. That is, in Fig. 3, the coolant liquid close to the saturation state exiting the condenser in the state ③ is supercooled to the state 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.

It is not always said that saturated refrigerant enters a suction tube depending on the type of evaporator, and it is not necessarily completely saturated steam, but has a structure that is liable to be sucked in a state where liquid droplets remain (full liquid evaporator). ) And may be sucked in the state of wet steam depending on the operating conditions. In this case, the liquid-gas heat exchanger 200 is used to increase the degree of superheat in the suction gas.

Further, in the fully liquid evaporator, since the refrigerant and the lubricating oil are in a mixed state inside the evaporator, the liquid level is kept relatively high so that oil may be sucked into the suction pipe together with the refrigerant on the evaporation surface.

In such a case, the liquid-gas heat exchanger 200 is used to heat the refrigerant to be sucked into the suction pipe with a suitable superheat, and to separate the oil from the refrigerant to return to the compressor through the suction pipe.

As shown in the diagram of FIG. 3, the refrigerant gas exiting the evaporator 40 has an enthalpy such as ① but the superheat is increased while passing through the liquid-gas heat exchanger 200 to be in a state Δi _b. As the enthalpy is increased, it can be introduced into the compressor.

Thus, the liquid-gas heat exchanger 200 described above to increase the cooling efficiency of the cooling cycle by overcooling the refrigerant liquid going to the expansion valve 30 and overheating the refrigerant gas sucked into the compressor 10 in the refrigerator of the present invention. ).

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.

4 is a partial cutaway perspective view showing that the liquid-gas heat exchanger is provided in the vacuum space between the inner case and the outer case in the refrigerator according to the present invention, Figure 5 is an inner case and the outer case and the spacer therebetween And a partially cutaway perspective view showing the assembly structure thereof.

In FIG. 4, the outer case 120 is opaque so that the inside of the vacuum space 130 will not be visible, but is shown to be visible for convenience.

In the refrigerator of the present invention, the main body 1 includes an inner case 110 in which the storage space is formed; An outer case 120 accommodated in the inner case and spaced apart from the inner case by a predetermined distance; A vacuum space portion 130 provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform a heat insulating action between the inner case and the outer case; It is arranged to form a long flow path in the vacuum space, and includes a liquid-gas exchanger (200) for heat exchange between the low-temperature gas refrigerant and the liquid refrigerant at room temperature before entering the evaporator. .

In the case of the refrigerator having a vacuum space of the present invention, in order to withstand the vacuum pressure, there is a restriction that the 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. have.

In addition, since the liquid-gas heat exchanger is made of a metal material, the metal pipe is made of metal material to minimize the conduction of heat through the inner case 110 and the outer case 120 or other components in the vacuum space 130. It is desirable to minimize contact with.

4 and 5, in order to maintain the shape of the vacuum space 130 between the inner case 110 and the outer case 120, the inner case 110 and the outer case. It is preferable that a plurality of spacers 150 for maintaining the spacing between the 120 are disposed between the inner case 110 and the outer case 120. The plurality of spacers 150 are arranged to support a plurality of spacers 150 so as to maintain a gap 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, a structure for fixing the plurality of spacers 150 is the first support plate 160 It is formed integrally with the arrangement.

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

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

In addition, the first support plate 160 is further provided with a second support plate 170 disposed to contact the outer surface of the inner case 110 and disposed to contact the inner surface of the outer case 120. An end portion of the spacer 150 of 160 may be disposed to contact an inner surface of the second support plate 170.

That is, as shown in FIG. 5, the main body 1 is provided on any other surface of the inner case 110 and the outer case 120 facing each other to face the first support plate 160. It is preferable to further include a second support plate 170 disposed.

In the embodiment of FIG. 5, the second support plate 170 is disposed to contact the inner surface of the outer case 120, and the plurality of spacers 150 are fixedly disposed on the first support plate 160. The first supporting plate 160 and the second supporting plate 170 are maintained to maintain a gap.

Since the first support plate 160 is in contact with the outer surface of the inner case 110, the second support plate 170 is in contact with the inner surface of the outer case 120, the plurality of spacers 150 As a result, to maintain the gap between the inner case 110 and the outer case 120.

In addition, when there is no second support plate 170 as shown in Figure 4, the end of the plurality of spacers 150 will be arranged to be in direct contact with the inner surface of the outer case 120.

In addition, as shown in the enlarged view of FIG. 5, the second support plate 170 preferably includes a plurality of grooves 175 formed to insert end portions of the plurality of spaces 150 on the inner surface thereof. .

The plurality of grooves 175 formed on the second support plate 170 may be disposed on the spacers 150 when the second support plate 170 is poked in the plurality of spaces 150 formed integrally with the first support plate 160. Ensure that the relative position relative to

Since the inner case 110 and the outer case 120 forming the main body 1 should form a vacuum space 130 therebetween, for example, an inner case forming 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.

On the other hand, the first support plate 160 and the second support plate 170 to produce a unit having a predetermined size smaller than the inner case 110 and the outer case 120 and then the first support plate 160 and the first Two support plates 170 can be assembled by inserting a plurality of sets assembled by arranging the spacers 150 therebetween and inserted between the inner case 110 and the outer case 120.

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

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

In addition, end portions of the plurality of spacers 150 may have a convex curved shape.

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

In addition, the plurality of grooves 175 of the second support plate 170 may 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 is easy after assembling and the second support plate 170 is not removed after assembly. It can be fixed so as not to move in a direction parallel to the surface.

In addition, the plurality of spacers 150 may be arranged in a plurality of rows vertically and horizontally.

As shown in FIGS. 4 and 5, the plurality of spacers 150 integrally formed and arranged on the first support plate 160 are arranged in rows in the vertical direction and the left and right directions.

By arranging the plurality of spacers 150 in such a manner as to arrange a plurality of rows, not only the design and molding manufacturing is easy but also the assembling work is easy, and the strength to withstand the vacuum pressure or external impact in the vacuum space 130 after assembly is increased. Can be larger.

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

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

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

Through this, heat of the outside of the outer case 120 may be prevented from being transferred by the conduction into the inner case 110 through the liquid-gas heat exchanger 200 and the spacer 150.

The liquid-gas heat exchanger 200 includes a compressor suction tube 220 through which a low-temperature gas refrigerant flowing through the evaporator 40 flows into the compressor 10, and a capillary tube through which liquid refrigerant at room temperature flows before entering the evaporator 40. It is preferable that 210 is welded to contact each other, and both ends of the inner case 110 and the outer case 120 are welded to each other.

As shown in FIG. 4, the compressor suction tube 220 is a refrigerant tube through which the low-temperature gas refrigerant flowing through the evaporator 40 flows into the compressor 10, and is formed to have a larger diameter than the capillary tube 210. have.

The capillary tube 210 is a refrigerant tube through which a liquid refrigerant at room temperature flows before being introduced into the evaporator, and is formed to have a relatively smaller diameter than the compressor suction tube 220.

Types of liquid-gas heat exchangers include shell-and-tube, tube-contact and double-tube liquid-gas heat exchangers, depending on the method of joining the compressor suction pipe and capillary or the overall shape.

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

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

In addition, both ends 222 of the liquid-gas heat exchanger 200 are respectively disposed at a predetermined position, and the liquid-gas heat exchanger 200 is S-shaped to form a flow path longer than its straight line distance. It is desirable to make it into a form.

Thus, the liquid-gas heat exchanger 200 may be referred to as "S-pipe" in view of its shape.

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

In addition, a portion of the first support plate 160 in which the one end 222 of the liquid-gas heat exchanger 200 is welded to the inner case 110 is a concentric circle and a communication hole having a larger diameter ( 162 is 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 together with the second support plate 170, the liquid-gas heat exchanger 200 is provided. At the other end portion 222 of the) is welded to the outer case 120 will be formed a communication port concentric with it and having a larger diameter.

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

Thus, when the liquid-gas heat exchanger 200 is welded to the inner case 110 and the outer case 120, the first support plate 160 and the second supporting plate 160, which are structures for supporting the plurality of spacers 150, are provided. Since the support plate 170 may be affected, it is preferable to form the communication port 162 of the case larger than the communication port 122 of the support plate.

And, as mentioned above, the liquid-gas heat exchanger 200 is preferably spaced apart from the inner case 110 and the outer case 120, respectively, except for welds at both ends thereof.

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, the contact portion thereof. This is because heat may be conducted through the heat insulation performance.

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

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

The guide ring 250 allows the liquid-gas heat exchanger 200 to be spaced apart from the inner case 110 and the outer case 120 by a predetermined interval, respectively.

Strictly speaking, when the first support plate 160 and the second support plate 170 is provided, the guide ring 250 is the liquid-gas heat exchanger 200 is the first support plate 160 and the first 2 is spaced apart from contact with the support plate 170.

In addition, the plurality of guide rings 250 are disposed at predetermined intervals along the length of the liquid-gas heat exchanger 200 so that the liquid-gas heat exchanger 200 is different in the vacuum space 130. B) be spaced apart from the support plate.

In addition, the guide ring 250, since the liquid-gas heat exchanger 200 is a shape in which two pipes having different diameters are joined to each other, the guide ring 250 preferably has an inner peripheral surface shape corresponding to the outer peripheral surface shape.

On the other hand, the guide ring 250 is shown in the form of a circular ring in Figure 4, if the liquid-gas heat exchanger 200 can be supported so as to be spaced apart from the surrounding case or support plate may have a different form. There will be.

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

Thus, both ends of the liquid-gas heat exchanger 200 made of copper may be welded to an inner case and an outer case made of a stainless steel sheet, and thus, may endure the vacuum pressure of the vacuum space 130. Confidentiality can be maintained.

In addition, although both ends of the liquid-gas heat exchanger 200 are welded to the inner case 110 and the outer case 120, respectively, and eventually penetrate the vacuum space 130, the liquid-gas heat exchanger Since the length of the 200 is considerably long, the heat transfer conducted through the liquid-gas heat exchanger 200 made of copper is insignificant, so that the thermal insulation performance is not significantly reduced.

In addition, the guide ring 250 is preferably made of a ceramic material or polycarbonate (PC).

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

Finally, the liquid-gas heat exchanger 200, the capillary 210 and the compressor suction tube 220 are spaced apart from each other at both ends welded to the inner case 110 and the outer case 120. In the inner case 110 and the outer case 120 is preferably welded to each.

As shown in FIG. 4, two communication parts are spaced apart from each other so that the capillary 210 and the compressor suction tube 220 of the liquid-gas heat exchanger 200 can be welded to a predetermined portion of the outer case 120. Spheres 122 and 123 are formed.

Among the two communication ports 122 and 123, the first communication port 122 is welded to the end of the compressor suction pipe 220, and the second communication port 123 is welded to the capillary tube 210.

Since the diameter of the compressor suction tube 220 is larger than that of the capillary tube 210, the first communication port 122 is naturally larger than the second communication port 123.

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

According to the present invention, a thinner vacuum space portion is formed between the inner case and the outer case to provide a refrigerator having a relatively large volume of the storage compartment as well as a better thermal insulation performance.

In addition, in the installation of the liquid-gas heat exchanger in the vacuum space for improving the cooling efficiency in the cooling cycle provides a refrigerator that is easy to assemble without affecting the thermal insulation performance.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited only to this specific embodiment, and those skilled in the art are appropriately within the scope described in the claims of the present invention. Changes will be possible.

1: main body
4, 5: door
10: compressor
20: condenser
30: expansion valve
40: evaporator
110: inner case
120: outer case
122: first communication port
123: second communication port
130: vacuum space part
150: spacer
160: first support plate
162: communication port
170: second support plate
175: home
200: liquid-gas heat exchanger
210: capillary
213: end
220: compressor suction pipe
222: end

Claims (20)

Including a body having a storage space that can accommodate a predetermined storage,
The main body,
An inner case in which the storage space is formed;
An outer case accommodating the inner case, the inner surface of the inner case being 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 inside of which is sealed and maintained in a vacuum state to perform a heat insulating action between the inner case and the outer case;
A support structure positioned in the vacuum space portion formed between the inner case and the outer case and provided to maintain a vacuum space portion between the inner case and the outer case; And
A liquid-gas exchanger disposed to form a long flow path between the inner case and the outer case and causing heat exchange between the gas refrigerant passing through the evaporator and the liquid refrigerant before entering the evaporator,
It is provided in the vacuum space portion, and includes a guide for supporting the liquid-gas exchanger spaced apart from the outer surface of the inner case or the inner surface of the outer case,
One end of the liquid-gas heat exchanger is coupled to the communication port pre-formed in the outer case, the other end of the liquid-gas heat exchanger refrigerator characterized in that it is coupled to the communication port formed in the inner case. The method of claim 1,
And both ends of the liquid-gas heat exchanger are coupled to the inner case and the outer case, respectively, to pass through the vacuum space part. The method of claim 1,
And the guide has an inner circumferential surface shape corresponding to the outer circumferential surface shape of the liquid-gas heat exchanger. The method of claim 1,
At least a portion of the inner circumferential surface has a portion having a ring shape. The method of claim 1,
The guide is a refrigerator, characterized in that the heat conductivity is lower than the inner case and the outer case. The method of claim 1,
And the guide is arranged to receive the liquid-gas heat exchanger. The method of claim 1,
The liquid-gas heat exchanger is fitted to the guide, or the guide surrounds the liquid-gas heat exchanger. The method of claim 1,
And the liquid-gas heat exchanger is positioned between the inner case and the outer case together with the support structure after being combined with the support structure. The method of claim 1,
The liquid-gas heat exchanger is supported by the guide inside the vacuum space part, and the guide is supported by the support structure. The method of claim 1,
The refrigerator is provided with at least two guides spaced apart from each other. The method of claim 1,
At least a portion of the guide has a ring shape. The method of claim 1,
The guide is in contact with the support structure. The method of claim 12,
The support structure, the refrigerator having a support surface in contact with the guide. The method of claim 1,
And the liquid-gas heat exchanger is not in contact with the inner case and the outer case by the guide. The method of claim 1,
And the liquid-gas heat exchanger is elongated and has a bent portion. Including a body having a storage space that can accommodate a predetermined storage,
The main body,
An inner case in which the storage space is formed;
An outer case accommodating the inner case, the inner surface of the inner case being 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 inside of which is sealed and maintained in a vacuum state to perform a heat insulating action between the inner case and the outer case;
A support structure positioned in the vacuum space portion formed between the inner case and the outer case and provided to maintain the vacuum space portion between the inner case and the outer case; And
A liquid-gas exchanger disposed to form a long flow path between the inner case and the outer case and causing heat exchange between the gas refrigerant passing through the evaporator and the liquid refrigerant before entering the evaporator,
It is provided in the vacuum space portion, and includes a guide for supporting the liquid-gas exchanger spaced apart from the outer surface of the inner case or the inner surface of the outer case,
The support structure may be produced in the same size as that of the inner case and the outer case forming one side of the main body, or as a unit having a predetermined size smaller than the inner case and the outer case forming one side of the main body. After production, the refrigerator characterized in that located between the inner case and the outer case. The method of claim 16,
The support structure includes a first support part provided on any one surface of the inner case and the outer case facing each other, and a second support part provided on any other surface of the inner case and the outer case facing each other. Refrigerator, characterized in that. The method of claim 16,
And the liquid-gas heat exchanger is positioned between the inner case and the outer case together with the support structure after being combined with the support structure. The method of claim 16,
And the liquid-gas heat exchanger is arranged to form a long flow path in parallel with the first and second support parts. Including a body having a storage space that can accommodate a predetermined storage,
The main body,
An inner case in which the storage space is formed;
An outer case accommodating the inner case, the inner surface of the inner case being 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 inside of which is sealed and maintained in a vacuum state to perform a heat insulating action between the inner case and the outer case;
A support structure positioned in the vacuum space portion formed between the inner case and the outer case to maintain the vacuum space portion between the inner case and the outer case; And,
A liquid-gas exchanger disposed to form a long flow path between the inner case and the outer case and causing heat exchange between the gas refrigerant passing through the evaporator and the liquid refrigerant before entering the evaporator,
It is provided in the vacuum space portion, and includes a guide for separating the liquid-gas exchanger (liquid-gas exchanger) from the outer surface of the inner case or the inner surface of the outer case,
The guide is a refrigerator, characterized in that at least part in contact with the support structure.

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