KR20200133312A - A refrigerator comprising a vacuum space - Google Patents

Abstract

The present invention relates to a refrigerator having a vacuum space. More specifically, the refrigerator has a vacuum space between an outer case and an inner case forming a main body to improve a thermal insulation function thereof. According to the present invention, the refrigerator comprises the main body including a storage space for storing a predetermined storing object, and the main body comprises: the inner case; the outer case; the vacuum space; a support structure provided to maintain an interval of the vacuum space; a liquid-gas interchanger causing heat exchange; and a guide provided inside the vacuum space to support the liquid-gas interchanger by spacing the liquid-gas interchanger from an outer surface of the inner case or an inner surface of the outer case. One side end part of the liquid-gas interchanger is coupled to a connection hole preliminarily formed in the outer case, and the other side end part of the liquid-gas interchanger is coupled to another connection hole preliminarily formed in the inner case.

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 thermal 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 electric product that can store or refrigerate storage by maintaining the temperature of a storage room at an image or sub-zero temperature using a refrigerant cycle.

A general configuration of a refrigerator includes a main body in which a storage space for storing stored items is formed, and a door disposed rotatably or slidably 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 an insulating material is disposed between the inner case and the outer case.

The heat insulator prevents the temperature in the storage space from being affected by the external temperature.

Urethane foam is widely used as the heat insulating material, and a liquid urethane is injected into the space between the inner case and the outer case to foam-molded.

However, in order to realize the insulation effect by 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, and naturally the wall thickness between the inner case and the outer case becomes thicker, so that the size of the refrigerator becomes that It gets bigger.

However, in recent years, the tendency of refrigerators to become more compact has emerged, and there has been a need for a structure in which the volume of the internal storage space is increased and the external size is reduced than before.

Therefore, the present invention proposes a refrigerator having a new structure in which insulation is not injected between the inner case and the outer case of the refrigerator, but insulates by forming a vacuum space.

Meanwhile, in a refrigerator, since water vapor is cooled and attached to the evaporator forming a refrigeration cycle as frost, a defrosting device is provided that heats it to make 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, the outer case, and an insulating material therebetween.

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

In the case of a refrigerator in which a foam material is provided in a space between the inner case and the outer case in the related art, the pipe simply connects the pipe so as to pass through the inner case, the insulation material and the outer case.

Thus, the pipe was simply molded of plastic and then piped so as to pass through the inner case and the outer case, and then the insulation was foamed.

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

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

The present invention has been conceived to solve the above-described conventional problem, and provides a refrigerator capable of increasing the heat insulation effect by forming a vacuum space between the inner case and the outer case, while minimizing the external volume. have.

In addition, an object is to provide a refrigerator having a support structure capable of maintaining the space between the inner case and the outer case without being deformed by an external shock, even though a vacuum space is formed between the inner case and the outer case.

In addition, an object of the present invention is to provide a refrigerator having a structure capable of minimizing deterioration of thermal insulation performance by disposing a liquid-gas heat exchanger in the vacuum space.

A refrigerator according to the present invention for achieving the above object includes a main body having a storage space in which a predetermined storage object 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 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 an adiabatic action between the inner case and the outer case; It is characterized in that it comprises a liquid-gas exchanger (liquid-gas interchanger) arranged to form a long flow path in the vacuum space, for heat exchange between the low temperature gas refrigerant passed through the evaporator and the liquid refrigerant at room temperature before flowing into the evaporator. do.

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

It is preferable that the second support plate includes a plurality of grooves formed on an inner surface thereof such that end portions of the plurality of spaces are inserted.

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

It is preferable that the liquid-gas heat exchanger is arranged so as not to contact the plurality of spaces therebetween.

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

It is preferable that the liquid-gas heat exchanger is arranged to be spaced apart from the inner case and the outer case, respectively, except for welding portions at both ends thereof.

It is preferable that the main body further includes a plurality of guide rings arranged to surround the liquid-gas heat exchanger to support the liquid-gas heat exchanger so as to be spaced apart from the inner case and the outer case, respectively.

It is preferable that the liquid-gas heat exchanger is made of copper, and the guide ring is made of ceramic or polycarbonate.

The liquid-gas heat exchanger is preferably welded to the inner case and the outer case, respectively, at a position where the capillary tube and the compressor suction tube are spaced apart from each other at both ends of the inner case and the outer case.

According to the refrigerator of the present invention described above of the present invention, a vacuum space portion is formed between the inner case and the outer case, rather than a normal heat insulating material, and heat transfer between the inner case and the outer case is suppressed by the vacuum space portion. The action takes place.

Since the heat insulation effect in a vacuum state is remarkably superior to the heat insulation effect of a conventional heat insulation material, the refrigerator according to the present invention has the advantage of excellent heat insulation than the conventional refrigerator.

On the other hand, in the case of the vacuum space, heat insulation is achieved if only the vacuum state is maintained regardless of its thickness (the gap between the inner case and the outer case). The increase in thickness leads to an increase in the size of the refrigerator.

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

In addition, a liquid-gas heat exchanger is disposed in the vacuum space, but heat transfer is minimized through the liquid-gas heat exchanger, thereby providing excellent insulation performance.

1 is a perspective view showing an example of a refrigerator according to the present invention.
2 is a schematic diagram illustrating a function of a liquid-gas heat exchanger in a cooling cycle of a refrigerator.
3 is a Moliere diagram illustrating the function of the 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 between an inner case and an outer case in the refrigerator according to the present invention.
5 is a partially cut-away perspective view showing an inner case and an outer case, spacers 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.

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 provided to be rotatable on the right side of.

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

That is, the refrigerator of FIG. 1 is a so-called side-by-side type refrigerator in which the freezer compartment is disposed on the left side and the refrigerator compartment is disposed on the right side. However, the refrigerator of the present invention is of all types regardless of how the refrigerator compartment and the freezer compartment are arranged. Can be applied to refrigerators. In addition, of course, it may be applied to a refrigerator provided with 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.

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

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

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

Meanwhile, in FIG. 1, for convenience, the inner case 110, the outer case 120, and the spacer 150 constituting the main body are illustrated in a state in which the liquid-gas heat exchanger 200 to be described later is omitted.

With reference to FIGS. 2 and 3, a liquid-gas heat exchanger 200 provided in the vacuum space of the refrigerator of the present invention will be described.

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

The cooling cycle refers to a refrigerant circulation cycle in which a refrigerant passes through a compressor, an evaporator, an expansion valve, and an evaporator to exchange heat with external air to supply cool air.

As shown in FIG. 2, the refrigerant vaporized in the evaporator 40 flows into the compressor 10 and is compressed, and then condensed in the condenser 20 to become a liquid state. The liquid refrigerant expands while passing through the expansion valve 30 and then vaporizes in the evaporator to absorb heat from the surrounding air to generate cold air.

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

If the liquid refrigerant, that is, the refrigerant liquid is almost saturated, there is a pressure drop due to the resistance during passage of the refrigerant pipe, the liquid pressure decreases due to the rise of the liquid pipe, or heat penetration due to the high ambient temperature. Accordingly, flash gas may be generated in the refrigerant liquid. Accordingly, the piping resistance is remarkably increased, and in particular, the capacity of the expansion valve is greatly reduced, thereby significantly reducing the refrigeration capacity.

Thus, the refrigerant liquid is supercooled so that this does not occur. That is, the refrigerant liquid close to the saturated state from the condenser in the state ③ in FIG. 3 is supercooled to the state ④.

By this supercooling, as can be seen from the Moliere diagram of FIG. 3, when the refrigerant liquid is further cooled by Δi _a and the refrigerant liquid vaporizes in the evaporator through the expansion valve, the refrigeration effect increases by Δi _a .

In addition, depending on the type of evaporator, it cannot be said that the refrigerant boiled in the suction pipe is completely saturated, and it is easily sucked in a state where liquid particles remain (full-liquid evaporator ), and it may be inhaled in the state of wet steam depending on the driving conditions. In such a case, the liquid-gas heat exchanger 200 is used to increase the superheat degree of the suction gas.

In addition, in a flooded evaporator, since the refrigerant and lubricating oil are mixed inside the evaporator, the liquid level is kept relatively high so that the oil and the refrigerant are sucked into the suction pipe from the evaporation surface.

In such a case, the refrigerant is heated using the liquid-gas heat exchanger 200 to be sucked into the suction pipe with an appropriate superheat, and at the same time, the oil is separated from the refrigerant and returned to the compressor through the suction pipe.

As shown in the diagram of FIG. 3, the refrigerant gas exiting the evaporator 40 has the same enthalpy as ①, but the superheat degree increases as it passes through the liquid-gas heat exchanger 200 and becomes the same as ②, Δi _b As the enthalpy is increased, it can be introduced into the compressor.

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

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 partially cut-away perspective view showing that a 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, and FIG. 5 shows the inner case and the outer case, and a spacer therebetween. And a partially cut-away perspective view showing the assembly structure thereof is shown.

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

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 in which the inner case is accommodated and disposed to be spaced apart from the inner case by a predetermined distance; A vacuum space unit 130 provided between the inner case and the outer case, the inner case being sealed and maintained in a vacuum state to perform an adiabatic action between the inner case and the outer case; And a liquid-gas interchanger (200) disposed to form a long flow path in the vacuum space and configured to exchange heat between a low temperature gas refrigerant passing through the evaporator and a liquid refrigerant at room temperature before flowing into the evaporator. .

In the case of a refrigerator having a vacuum space of the present invention, there is a limitation in that 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. have.

In addition, since the liquid-gas heat exchanger is made of a metal material, pipes made of metal are used to minimize heat conduction through the inner case 110 and the outer case 120 or other parts in the vacuum space unit 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 to maintain a gap between the 120s are disposed between the inner case 110 and the outer case 120. The plurality of spacers 150 are disposed and supported so as to maintain a gap between the inner case 110 and the outer case 120.

The plurality of spacers 150 should 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 provided with the first support plate 160 It is formed integrally with and arranged.

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

4 and 5, the first support plate 160 is arranged to contact the outer surface of the inner case 110, but the first support plate 160 is arranged to contact the inner surface of the outer case 120. May be.

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

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

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 It is 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 Eventually, the inner case 110 and the outer case 120 are supported so as to maintain a gap therebetween.

In addition, when there is no second support plate 170 as shown in FIG. 4, ends of the plurality of spacers 150 will be disposed to directly contact 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 so as to insert the ends of the plurality of spaces 150 into the inner surface thereof. .

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

Since the inner case 110 and the outer case 120 constituting the main body 1 need to 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 so as to have a size corresponding to the size of one side thereof.

On the other hand, the first support plate 160 and the second support plate 170 produce a unit having a predetermined size smaller than that of the inner case 110 and the outer case 120, and then 2 A plurality of sets assembled by butting the support plate 170 with the spacer 150 interposed therebetween may be fabricated and assembled by inserting it 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 fabricated and assembled to have the same size as the inner case 110 and the outer case 120.

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

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 is in the groove 175 formed in the second support plate 170 when assembling. Because it is easily seated, the assembly can be much easier.

In addition, it is more preferable that the plurality of groove portions 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, positioning is easy during assembly and the second support plate 170 is It can be fixed so that it does not move in a direction parallel to its surface.

In addition, it is preferable that the plurality of spacers 150 are arranged in a plurality of rows vertically and horizontally.

A plurality of spacers 150 integrally formed and disposed on the first support plate 160 are arranged in rows in vertical and horizontal directions, as shown in FIGS. 4 and 5.

Since the plurality of spacers 150 are arranged in a plurality of rows in this way, not only is it easy to design and manufacture, but also assemble work is easy, and the strength to withstand vacuum pressure or external shock in the vacuum space 130 after assembly is increased. It can be bigger.

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

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

Through this, it is possible to prevent heat from outside the outer case 120 from being transmitted by 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 pipe 220 through which a low-temperature gas refrigerant that has passed through the evaporator 40 flows to the compressor 10 and a capillary tube through which a liquid refrigerant at room temperature flows before flowing into the evaporator. It is preferable that both ends are welded to the inner case 110 and the outer case 120 so that the 210 is in contact with each other.

As shown in FIG. 4, the compressor suction pipe 220 is a refrigerant pipe through which the low-temperature gaseous refrigerant that has passed through the evaporator 40 flows to 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 the liquid refrigerant at room temperature flows before flowing into the evaporator, and is formed to have a relatively small diameter compared to the compressor suction tube 220.

The type of liquid-gas heat exchanger includes a shell and tube type, a tube contact type, and a double tube type liquid-gas heat exchanger, depending on the method of joining the compressor suction tube and the capillary tube or the overall shape.

The liquid-gas heat exchanger 200 used in the present invention is a tube-contact liquid-gas heat exchanger among them, and the compressor suction pipe 220 and the capillary tube 210 are welded to contact each other to form a long pipe. 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 wide area instead.

In addition, both ends 222 of the liquid-gas heat exchanger 200 are respectively disposed at predetermined positions, and in order to form a flow path longer than the linear distance, the liquid-gas heat exchanger 200 is S-shaped. It is desirable to form it.

Thus, the liquid-gas heat exchanger 200 may be referred to as an "S-pipe" in light 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 previously formed in the outer case 120, and the liquid-gas heat exchanger 200 The other end 222 of) is welded to a communication port (not shown) previously formed in the inner case 110.

In addition, in the 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, a communication hole concentric therewith and 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 as shown in FIG. 5, the liquid-gas heat exchanger 200 A communication port having a larger diameter and a concentric circle therewith will be formed at a portion where the other end 222 of) is welded to the outer case 120.

The inner case 110 and the outer case 120 are 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.

So, 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 support plate 160 and the second structure support the plurality of spacers 150 Since it may affect the support plate 170, 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 disposed to be spaced apart from the inner case 110 and the outer case 120, respectively, except for welding portions at both ends thereof.

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, the contact portion This is because heat may be conducted through the thermal insulation and the thermal insulation performance may be reduced.

To prevent this, the main body 1 is arranged to surround the liquid-gas heat exchanger 200 to support the liquid-gas heat exchanger so as 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 are formed in the form of a ring surrounding the liquid-gas heat exchanger 200, that is, the compressor suction pipe 220 and the capillary tube 210 bonded 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 distance, respectively.

Strictly speaking, when the first support plate 160 and the second support plate 170 are provided, the guide ring 250 includes the liquid-gas heat exchanger 200 and the first support plate 160 and the first support plate 160 and the second support plate 170 are provided. 2 Separate the support plate 170 so as not to contact.

In addition, 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 arranged in a different case in the vacuum space 130. B. Support to be separated from the support plate.

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

On the other hand, the guide ring 250 is shown to have a circular ring shape in FIG. 4, but may have a different shape if it can be supported so as to be spaced apart from a surrounding case or support plate by inserting the liquid-gas heat exchanger 200. 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 ends of the liquid-gas heat exchanger 200 made of copper material can be welded to the inner case and the outer case made of a stainless steel sheet in general, it is sufficient to withstand the vacuum pressure of the vacuum space unit 130. Confidentiality can be maintained.

In addition, both ends 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 130, but the liquid-gas heat exchanger Since the length of 200 is quite long, the amount of heat transferred through the liquid-gas heat exchanger 200 made of copper is insignificant, and the heat 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 is to separate the liquid-gas heat exchanger 200 from the surrounding case or support plate, it is possible to minimize heat transfer through it by forming a ceramic or polycarbonate material having a low thermal conductivity.

Finally, in the liquid-gas heat exchanger 200, the capillary tube 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 It is preferable that the inner case 110 and the outer case 120 are welded respectively.

As shown in FIG. 4, at a predetermined portion of the outer case 120, the capillary tube 210 of the liquid-gas heat exchanger 200 and the compressor suction tube 220 are separated from each other so that they can be welded. 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 pipe 220 is larger than the diameter of the capillary tube 210, the first communication port 122 is naturally formed larger than the second communication port 123.

In addition, referring to FIG. 4, it can be seen that the capillary tube 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, by forming a vacuum space portion having a thickness thinner than that of the prior art between the inner case and the outer case, not only can the volume of the storage chamber be made larger, but also a refrigerator having better thermal insulation performance is provided.

In addition, when a liquid-gas heat exchanger for improving cooling efficiency in a cooling cycle is installed in a vacuum space, there is provided a refrigerator that is easy to assemble without affecting thermal insulation performance.

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 of ordinary skill in the relevant field will appropriately fall within the scope described within 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: groove
200: liquid-gas heat exchanger
210: capillary tube
213: end
220: compressor suction pipe
222: end

Claims (11)

Including a body having a storage space in which a predetermined storage can be accommodated,
The main body,
An inner case in which the storage space is formed inside;
An outer case accommodating the inner case, the inner surface 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 an adiabatic action between the inner case and the outer case;
A support structure positioned inside the vacuum space portion formed between the inner case and the outer case, and provided to maintain a space between the inner case and the outer case; And,
A liquid-gas interchanger disposed to form a long flow path between the inner case and the outer case, and configured to exchange heat between the gaseous refrigerant passing through the evaporator and the liquid refrigerant before flowing into the evaporator,
It is provided inside the vacuum space, and includes a guide that separates the liquid-gas interchanger from an outer surface of the inner case or an inner surface of the outer case,
A refrigerator provided with a portion excluding one end 222 of the liquid-gas heat exchanger 200 and the other end 222 of the liquid-gas heat exchanger 200 spaced apart from the inner case and the outer case. The method of claim 1,
The guide is a refrigerator that separates the liquid-gas interchanger so that it does not come into contact with the support structure. The method of claim 1,
The support structure includes a support plate provided between the inner case and the outer case, and a spacer supporting the inner case and the outer case to maintain a gap therebetween. The method of claim 3,
The guide is a refrigerator that is spaced apart so that the liquid-gas interchanger does not contact the support plate. The method of claim 3,
The guide is a refrigerator that separates the liquid-gas interchanger from contacting the spacer. Including a body having a storage space in which a predetermined storage can be accommodated,
The main body,
An inner case in which the storage space is formed inside;
An outer case accommodating the inner case, the inner surface 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 an adiabatic action between the inner case and the outer case;
A support structure positioned inside the vacuum space portion formed between the inner case and the outer case, and provided to maintain a space between the inner case and the outer case; And,
A liquid-gas interchanger disposed to form a long flow path between the inner case and the outer case, and configured to exchange heat between the gaseous refrigerant passing through the evaporator and the liquid refrigerant before flowing into the evaporator,
One end 222 of the liquid-gas interchanger and the other end 222 of the liquid-gas heat exchanger 200 are fixed to the inner case and the outer case, respectively,
One end 222 of the liquid-gas heat exchanger 200 is fixed to a communication port 122 previously formed in the outer case 120, and the other end 222 of the liquid-gas heat exchanger 200 is It is fixed to a communication port previously formed in the inner case 110,
A refrigerator provided with a portion excluding one end 222 of the liquid-gas heat exchanger 200 and the other end 222 of the liquid-gas heat exchanger 200 spaced apart from the inner case and the outer case. The method of claim 6,
The liquid-gas heat exchanger 200 includes a capillary tube 210 and a compressor suction tube 220, and both ends of the capillary tube and the compressor suction tube are fixed to the inner case 110 and the outer case 120, respectively. . The method of claim 6,
The outer case 120 includes two communication ports 122 and 123 spaced apart from each other so that the capillary tube 210 and the compressor suction tube 220 of the liquid-gas heat exchanger 200 can be fixed. The method of claim 6,
A refrigerator comprising a guide provided inside the vacuum space and supporting the liquid-gas interchanger by being spaced apart from an outer surface of the inner case or an inner surface of the outer case. The method of claim 6,
The liquid-gas heat exchanger 200 is a refrigerator mounted so as not to contact or interfere with other components in the vacuum space 130 arranged in the vacuum space 130 except for the inner case and the inner case . The method of claim 6,
The liquid-gas heat exchanger 200 is a refrigerator mounted so as not to contact or interfere with other parts in the vacuum space 130 arranged in the vacuum space 130 except for the guide.

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