KR102187851B1 - Beverage refrigerator - Google Patents

Abstract

The present invention relates to a beverage refrigerator. More specifically, the beverage refrigerator comprises a storage chamber storing a beverage and a cooling device. The beverage refrigerator comprises: the storage chamber having an inner storage space; and a storage member which has a storage unit having one opened side and the inner storage space and has a coupling unit provided to the storage unit to be detachably coupled to the inside of the storage chamber.

Description

Beverage refrigerator{BEVERAGE REFRIGERATOR}

The present invention relates to a refrigerator for beverages, and more particularly, to a refrigerator for beverages including a cooling device in a storage compartment for storing beverages.

Refrigerators are generally box-shaped devices for storing food or drugs at low temperatures so that they do not cool or spoil. They consist of a storage compartment and a cooling device, and are cooled using ice, electricity, or gas.

Such a refrigerator compresses a refrigerant such as freon gas by a compressor, and the compressed refrigerant is vaporized in an evaporator via a condenser and absorbs heat to lower the temperature of the storage chamber.

There are refrigerators for beverages. The beverage refrigerator is provided with a plurality of shelves in the storage compartment at intervals along the height direction.

On the other hand, the prior art Patent Publication No. 10-2016-0149413 (hereinafter referred to as the prior art) relates to a refrigerator and a beverage supply method using the same, and more seriously, a main body having a food storage space; A door selectively shielding the food storage space; A storage unit formed inside the door and storing a beverage container; A support portion provided in the storage unit, supporting the beverage container upward, and having a first installation hole; A valve at least partially positioned in the first installation hole, coupled to an outlet of the beverage container, and selectively allowing a beverage stored in the beverage container to be supplied to the outside of the beverage container; And a lever provided below the support part, connected to the valve, interlocking with the valve, and receiving an upward external force. When the upward external force is input to the lever, the valve By allowing the user to descend through the outlet and to be supplied to the outside of the beverage container, the user can receive the beverage stored in the beverage container without taking out the beverage container stored inside the refrigerator door.

However, such a conventional technique has a problem in that it is easy to install a cooling device, has excellent aesthetics, and does not include a configuration capable of more effectively protecting the cooling device.

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a refrigerator for beverages that is easy to install a cooling device, has excellent aesthetics, and can more effectively protect the cooling device.

In addition, an object of the present invention is to provide a refrigerator for beverages in which space is easily utilized.

Another object of the present invention is to provide a refrigerator for beverages capable of effectively suppressing the outflow of cold air from the storage compartment.

The present invention for the purpose of solving the above problems has the following configurations and features.

A beverage refrigerator including a cooling device, comprising: a storage compartment having a storage space formed therein, an accommodation portion having an opening at one side and having an accommodation space formed therein, and a coupling portion provided in the accommodation portion and detachably coupled to the inside of the storage compartment It includes a receiving member.

In addition, the storage compartment may include an upper wall forming the storage space, and the upper wall may include an inclined portion that is provided at a front side and inclined upward.

In addition, the storage chamber may include an inner wall forming the storage space and a through hole formed in the inner wall, are made of a plastic material, and may include a sealing member covering the through hole.

The present invention having the above configuration and characteristics includes a receiving member including a receiving unit and a coupling unit provided in the receiving unit and detachably coupled to the inner side of the storage chamber, so that the refrigerant moving tube, cable, etc. are not installed outside the storage chamber, so it is beautiful And because the refrigerant moving tube, cable, etc. are not installed on the inner wall, it is possible to manufacture the storage room and the cooling device in a modular manner, and the cooling device can be easily installed in the storage room. It has the effect of being able to effectively protect against and inhibit heat exchange.

In addition, the present invention has an effect that space utilization is improved by including an upwardly inclined inclined portion in which the upper wall of the storage chamber is provided on the front side.

In addition, the present invention has the effect of improving versatility by including a sealing member made of a plastic material, since it is possible to effectively suppress the outflow of cold air from the storage chamber and to seal the through hole corresponding to the refrigerant moving tube having various appearances.

1 is a perspective view of a beverage refrigerator according to an embodiment of the present invention.
2 is a diagram for describing a cooling device in a beverage refrigerator.
3 is a front view of a beverage refrigerator.
4 is a view for explaining the accommodation member.
5 is a view for explaining the sealing member.
6 is a view for explaining a further embodiment of the present invention.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist~ are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~, etc. described in the present specification will only be referred to to distinguish different constituent elements, and are not limited to the order of manufacture, and the names in the detailed description and claims of the invention It may not match.

Throughout the present specification, when a part is said to be "connected" to another part, it is not only "directly connected" or "electrically directly connected", but also "indirectly" with another element interposed therebetween. It also includes cases of "connected" or "electrically indirectly connected".

1 is a perspective view of a beverage refrigerator according to an embodiment of the present invention, FIG. 2 is a view for explaining a cooling device in the beverage refrigerator, and FIG. 3 is a front view of the beverage refrigerator.

A beverage refrigerator R according to an exemplary embodiment of the present invention is a refrigerator for storing beverages in a refrigerator at a low temperature, and includes a cooling device 3. Illustratively, a beverage refrigerator R according to an embodiment of the present invention has a width (length in the left and right directions based on FIG. 3) of 650 mm, a thickness (length in the front and rear directions based on FIG. 3) of 580 mm, and a height ( 3, the length in the vertical direction) may be 1,850 mm.

A refrigerator for beverages (R) according to an embodiment of the present invention generally includes a storage compartment (1) in which a storage space (S) for storing beverages is formed, and a cooling device that supplies cold air to the storage compartment (1). It includes (3).

The cooling device 3 generally includes a compressor, a condenser, an evaporator 33 and the like. The compressor is a condenser (34) that discharges heat from the refrigerant supplied from the storage chamber (1), a compressor (31) that compresses gas to a high pressure, and a motor that rotates a rotating blade that cools the condenser (34) and the compressor (31). (35) and the like.

Such a compressor may be provided below the storage chamber 1 or on the rear side of the storage chamber 1 (left side with reference to FIG. 2 ).

The condenser moves the refrigerant compressed at high pressure to the side of the evaporator 33 to be described later. In the condenser, the refrigerant is liquefied due to the high pressure to release heat. This condenser may include a refrigerant moving tube 32 and a heat sink.

The evaporator 33 supplies the liquefied refrigerant to the storage chamber 1, and the liquefied refrigerant is easily vaporized due to high boiling point at high pressure, and the refrigerant is vaporized and absorbs heat from the storage chamber 1 to (Storage space (S)) is kept at a low temperature.

The evaporator 33 may include a capillary tube, which is a passage for a refrigerant having a small diameter. Since the moving speed of the refrigerant is increased to lower the static pressure, vaporization of the refrigerant in the storage space S may be further promoted.

In addition, the evaporator 33 may include a fan 331 so that the refrigerant is more effectively supplied to the storage chamber 1. The above-described refrigerant may be, for example, freon gas.

4 is a view for explaining the accommodation member.

A beverage refrigerator R according to an embodiment of the present invention includes the storage compartment 1 and the cooling device 3 described above, and in the following description, for convenience of explanation, a beverage refrigerator according to an embodiment of the present invention (R) will be referred to as'this device'.

Referring to FIGS. 1 to 4, the apparatus (a refrigerator for beverages R according to an exemplary embodiment of the present invention) includes the storage chamber 1, the accommodation member 2, and the cooling device 3.

The accommodating member 2 includes an accommodating portion 21 having one side open and an accommodating space formed therein, and a coupling portion 22 provided in the accommodating portion 21 and detachably coupled to the inside of the storage chamber 1.

It is said that the receiving portion 21 is detachably coupled to the inner side of the storage chamber 1, but may be detachably coupled to the inner wall of the storage chamber 1 forming the storage space S.

In general, the storage chamber 1 has a rectangular lower wall 13 in a box shape, a side wall 12 extending upward from the three corners of the lower wall 13, and an upper end of the side wall 12 facing the lower wall 13. It may include an upper wall 11 connecting the upper wall 11 and a door 14 for opening and closing an opening formed by a front end of the upper wall 11, the side wall 12, and the lower wall 13.

In this case, the coupling part 22 may be detachably coupled to the side wall 12 as an example, and may be detachably coupled to any one facing the door 14 in the side wall 12 as well.

The receiving part 21 is a case in which one side is opened and a receiving space is formed inside, and the one side may mean a side facing the inner wall, and the opening of the receiving part 21 is formed by the inner wall. Can be covered.

As described above, the coupling portion 22 is said to be detachably coupled to any one of the side walls 12 facing the door 14, but the receiving portion 21 may have an open rear side. Here, the rear (rear) refers to the left (left end) based on FIG. 2, and the front (front) refers to the right (right end) based on FIG. 2, and the same will be applied in the following description. .

At this time, the coupling portion 22 is, exemplarily, a junction portion 221 that extends by bending to be parallel to the inner wall (e.g., any one of the side walls 12 facing the door 14) at the rear end of the receiving portion 21 And a coupling unit 222 (e.g., a bolt) for mutually coupling through the junction 221 and the inner wall (e.g., any one of the side walls 12 facing the door 14). I can.

As described above, it was said that the receiving space of the receiving part 21 is covered by the inner wall, and the receiving space may accommodate at least a part of the refrigerant moving tube 32 of the cooling device 3.

The receiving member 2 may include a through hole through which the refrigerant moving tube 32 passes (for example, an inlet hole through which the refrigerant moving tube 32 is introduced and a lead hole through which the refrigerant moving tube 32 is drawn out. ), and is inserted and extracted by the through hole so that the refrigerant moving tube 32 may be in communication with or connected to the above-described compressor and evaporator 33.

In addition to the refrigerant moving tube 32, the receiving part 21 may accommodate a cable 36 or the like. If the refrigerant moving tube 32 or the like is provided outside the storage chamber 1, the appearance is not good, but when it is built into the inner wall in the storage chamber 1, separate production of the storage chamber 1 and the cooling device 3 is difficult. There is a problem that it is difficult to install the refrigerant moving tube 32.

At this time, when the refrigerant moving tube 32 is installed in the storage space S of the storage room 1, the coolant moves by colliding with the refrigerant moving tube 32 in the process of storing and withdrawing beverages in the storage space S. There is a problem that the tube 32 may be damaged, and heat exchange between the refrigerant inside the refrigerant moving tube 32 and the refrigerant in the storage chamber 1 may be performed.

At this time, since the device includes the accommodation member 2, the refrigerant moving tube 32 can be installed in the storage space S, thereby improving the aesthetics of the device, and producing a modularized production of the storage chamber 1 and the cooling device 3 It enables and facilitates the installation of the refrigerant transfer tube 32, effectively protects the refrigerant transfer tube 32, and heat exchange between the refrigerant inside the refrigerant transfer tube 32 and the refrigerant inside the storage chamber 1 There is an advantage that it can be suppressed.

1 to 4, the upper wall 11 may be provided on the front side and may include an upwardly inclined inclined portion 111. As described above, the front was referred to as a direction from the storage space S of the storage chamber 1 toward the door 14 (right side based on FIG. 2).

The above-described evaporator 33 may be incorporated in the upper wall 11, and the fan 331 may be installed on the inclined portion 111. In this way, the device includes the evaporator 33 built-in on the upper wall 11, but includes an upwardly inclined inclined portion 111 on the front side, thereby maximizing the space utilization of the storage space (S). There is an advantage.

More specifically, in general, in the beverage refrigerator R, a plurality of shelves 6 on which beverages are mounted are disposed at intervals along the vertical direction, and have a length in the vertical direction on the sidewall 12 and have a vertical direction. Accordingly, a detachable member 5 may be provided which is provided with a plurality of shelves and includes a detachable part detachably coupled to the shelf 6.

Here, the vertical direction refers to a vertical direction, and refers to the vertical direction based on FIG. 2, but the same will be applied in the following description.

At this time, when the beverage box is mounted on any one of the shelves 6 disposed on the upper side, the upper wall 11 includes an inclined portion 111, so that the storage and withdrawal of beverages is easy and the upper wall 11 and the beverage There is an advantage in that collision of the back can be suppressed.

5 is a view for explaining the sealing member. 1 to 5, the storage chamber 1 includes a through hole 15 formed in the inner wall, and the device is made of a plastic material, and includes a sealing member 4 covering the through hole 15. I can.

As described above, in the present apparatus, the refrigerant moving tube 32 moves the refrigerant of the compressor toward the evaporator 33, and the through hole 15 may be the one through which the refrigerant moving tube 32 passes, and the compressor, evaporator ( The cable 36 electrically connected to each component of 33) may pass through.

At this time, the cold air in the storage space (S) may be discharged to the outside through the through hole (15), and the device includes a sealing member (4) covering the through hole (15), thereby increasing the efficiency of the cooling device (3). There is an advantage that it can be maximized.

The sealing member 4 is, for example, rubber clay, and may be a plastic material, and is fired in a semi-dry state according to the external shape of the refrigerant moving tube 32 and the cable 36, and then dried to the through hole ( 15) can be covered.

In this way, the sealing member 4 is formed of a plastic material, and is fired according to the external shape of the refrigerant moving tube 32 to seal the through hole 15, so that the sealing member corresponds to the external shape of the refrigerant moving tube 32 (4) has the advantage of being excellent in versatility because it can be changed.

1 to 5, each of the upper wall 11, the side wall 12, and the lower wall 13 has a thickness of 4.0 cm, so that the thermal insulation effect may be excellent. In addition, each of the upper wall 11, the side wall 12, and the lower wall 13 has a foamed urethane embedded therein, but the urethane density is high, so that the thermal insulation effect may be excellent.

In addition, the device may further include a base plate (not shown) disposed on the lower wall 13, and the risk of corrosion of the lower wall 13 may be minimized.

In addition, the refrigerant moving tube 32 is made of a silicone resin material, not a curable resin, and can be elastically deformed to facilitate drainage.

In addition, the device includes a caster 7 at the bottom, and the caster 7 is made of urethane, and the caster 7 is easily moved, and is fixed with a body and bolts, so that the caster 7 can be structurally more stable.

In addition, the cable 36 of this device is exemplarily accommodated inside the 4P line, but it is possible to suppress a short circuit.

In addition, the device is provided under the storage chamber 1 and may include a machine room in which the compressor is accommodated. Among the cables 36, the power line is fixed and twisted multiple times on the inner surface of the machine room in addition to the distribution board. And interruptions and the like can be suppressed.

In addition, in the present apparatus, the machine room is coated with urethane, so that rust generation can be effectively suppressed.

In addition, the device may have excellent corrosion resistance because the bracket is formed of stainless steel.

In addition, in this device, the door 14 is not made of steel or PVC, but is made of ABS plastic, so it may be light and strong against moisture.

Meanwhile, the present apparatus is for storing beverages at a low temperature, and a process of introducing or withdrawing beverages into or out of the storage space S is repeatedly performed, so that scratches may occur on the outer surface (surface) of the storage chamber 1.

In addition, in the storage room (1), beverages from the outside enter the storage space (S) at a low temperature, and condensation and dropping of water vapor on the outer surface of the container containing the beverages, or by contact with water in the process of washing the storage compartment (1), etc. There is a risk of this occurring.

When scratches occur on the outer surface (surface) of the storage chamber (1), crack corrosion may occur and corrosion may be promoted, and when corrosion occurs on the outer surface of the storage chamber (1), stress is concentrated and stress corrosion cracking may occur. There is.

In order to solve the above problems, the storage chamber 1 may include a protective film G provided on the outer surface.

On the other hand, if the storage room 1 is used for a long time with the protective film G applied, it is possible to check in real time that a fine groove is generated in the protective film G and scratches or corrosion occurs on the outer surface of the storage room 1 For this purpose, the protective film G needs to be maintained in a transparent state, and if a groove (hole) or the like occurs for maintenance of the protective film G, it is necessary to check this.

As a means for satisfying the above needs, the protective film (G) film is a first transparent adhesive layer (G1) in contact with the outer surface of the storage chamber (1), a transparent heating layer (G2) provided on the first transparent adhesive layer (G1), A second transparent adhesive layer G3 provided on the transparent heating layer G2 and a variable protective layer G4 provided on the second transparent adhesive layer G3 may be included.

Each of the first transparent adhesive layer (G1) and the second transparent adhesive layer (G3) is 100 parts by weight of an acrylic monomer consisting of 70 to 99% by weight of butyl acrylate and 1 to 30% by weight of acrylonitrile, It may contain 0.1 to 5 parts by weight of a radical initiator and 0.01 to 20 parts by weight of a crosslinking agent.

Butyl acrylate was adopted because the glass transition temperature was less than 0℃ when polymerized with a homopolymer, and acrylonitrile had a glass transition temperature of 80℃ or more when polymerized with a homopolymer.

If the butyl acrylate is less than 70% by weight, the glass transition temperature is increased, thereby reducing the impact resistance, and there is a problem in that haze occurs. In addition, if the content exceeds 99% by weight, the glass transition temperature is too low, which is not preferable because there is a problem in that abrasion resistance is inferior.

If the content of acrylonitrile is less than 1% by weight, the glass transition temperature is too low, so that adhesion durability decreases, and if the content exceeds 30% by weight, there is a problem that the initial adhesive strength decreases, which is not preferable.

The radical initiator is used for polymerization of the acrylic monomer, and commercially available radical initiators may be used.

The crosslinking agent is added to crosslink the acrylate-based copolymer obtained by polymerizing butyl acrylate and acrylonitrile, and, for example, hexanediol diacrylate may be used. If the content ratio of the crosslinking agent is less than 0.1 parts by weight, the sheet becomes flexible and there is a problem that the cutting property decreases, resulting in a decrease in productivity, and if the content ratio exceeds 20 parts by weight, it becomes hard and the impact resistance decreases, and there is a problem of crushing, which is not preferable. .

Each of the first transparent adhesive layer G1 and the second transparent adhesive layer G3 may maintain an adhesive force at a high temperature while maintaining a transparent state. It goes without saying that the first transparent adhesive layer G1 and the second transparent adhesive layer G3 maintain adhesive strength at high temperatures (about 37°C or higher) and may contain other commercially available additives on the premise of maintaining a transparent state.

The transparent heating layer G2 is provided on the top of the first transparent adhesive layer G1 to be described later, and is disposed between the first transparent adhesive layer G1 and the second transparent adhesive layer G3, and is indium tin oxide (Indium Tin Oxide). ), which generates heat when DC or AC electricity is applied, and is characterized by being transparent.

The variable protective layer (G4) is provided on the second transparent heating layer (G2), and is an agent in which 3.84 g of N-isopropyl acrylamide (NIPAM) polymer and 1.25 g of sodium alginate are dissolved per 250 ml of distilled water. A converting agent in which a second solution containing 3% calcium chloride and 0.5% ammonium persulfate is mixed in 1 solution and 300 ml of distilled water, and 5 to 30 parts by weight of methyltrimethoxysilane, 20 to 75 parts by weight of colloidal alumina , It may include a protective agent containing 30 parts by weight or less of isopropyl alcohol (Isoprophylene alcohol).

The first solution and the second solution are each degassed with nitrogen gas, and the first solution is added dropwise by a syringe to the stirred second solution, and at the same time as the dropping, fine particles containing calcium alginate as macrocapsules are generated. . The polymerization of the NIPAM contained within 1 to 3 hours is completed, and the obtained fine particles can be washed 3 to 7 times with distilled water.

Such a converting agent is present in a transparent state at about 37°C or less, and in a state exceeding 37°C, the uncrosslinked polymer is insoluble in the fine particles and becomes cloudy, so it is converted to an opaque state. If it goes down again below 37℃ from the insoluble state, the converting agent is converted to a transparent state, and the transparent and opaque state may reversibly change.

5 to 30 parts by weight of methyltrimethoxysilane, 20 to 75 parts by weight of colloidal alumina, and 30 parts by weight or less of isopropyl alcohol may be mixed by stirring for about 1 hour and then subjected to ultrasonic dispersion treatment.These protective agents are transparent It has excellent wear resistance, chemical resistance, corrosion resistance, weather resistance, and thermal stability.

As such, the storage chamber 1 has an advantage that scratches, corrosion, etc. can be suppressed by being provided with a protective film G including a protective agent having excellent wear resistance and corrosion resistance on the outer surface.

As described above, as the storage chamber 1 is used for a long period of time with the protective layer G provided on the outer surface, the protective layer G may generate micro grooves due to external force, and the storage chamber 1 ) May cause scratches and corrosion on the outer surface.

As described above, the protective film G is maintained in a transparent state at 37°C or less (refer to Fig. 6A), so that scratches or corrosion occurred on the surface of the storage room 1 equipped with the protective film G in real time. I can confirm.

As described above, in order to confirm in advance that the protective film G has been provided (attached) to the outer surface of the storage chamber 1 and has been used for a long time, the groove of the protective film G has occurred, or to scratch the outer surface of the storage chamber 1, In a state where it is confirmed that damage such as corrosion has occurred, there is a need to check the location of the groove in the protective film G for maintenance of the protective film G.

At this time. When electricity is applied to the transparent heating layer (G2), the transparent heating layer (G2) generates heat to transfer heat to the change agent, and when the change agent exceeds 37°C, the variable protective layer (G4) containing a protective agent becomes cloudy. It becomes opaque. On the other hand, the first transparent adhesive layer (G1), the transparent heating layer (G2), and the second transparent adhesive layer (G3) maintain a transparent state, and the color of the storage chamber 1 which was in an opaque state and a cloudy variable protective layer (G4) ) Color is contrasted (see [B] of FIG. 6), so that the location of the grooves in the variable protective layer G4 can be easily identified (the color of the outer surface of the storage chamber 1 and the variable protective layer G4 in an opaque state) The color of) is preferably different).

As described above, since the second transparent adhesive layer (G3) maintains adhesive strength even at a high temperature exceeding 37°C, the variable protective layer (G4) in the grooves generated in the variable protective layer (G4) attached to the outer surface of the storage chamber (1). It can be easily maintained by newly inputting.

As described above, the storage chamber 1 includes the protective film G4, which is easy to maintain, so that scratches, corrosion, etc. can be suppressed from occurring on the outer surface of the storage chamber 1 for a long period of time.

The present invention described above with reference to the accompanying drawings can be variously modified and changed by a person skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Beverage refrigerator: R
Storage: 1 Storage: S
Upper wall: 11 Inclined part: 111
Side wall: 12 Lower wall: 13
Doors: 14 Holes: 15
Receptacle: 2 Receptacle: 21
Joint: 22 Joint: 221
Combination unit: 222 Cooling unit: 3
Compressor: 31 Refrigerant transfer tube: 32
Evaporator: 33 Fan: 331
Condenser: 34 Motor: 35
Cable: 36 Sealing member: 4
Removable member: 5 Shelves: 6
Casters: 7

Claims (4)

In the refrigerator for beverages comprising a cooling device,
A storage room having a storage space formed inside; And
A receiving member including a receiving portion having an open side and having an receiving space formed therein, and a coupling portion provided in the receiving portion and detachably coupled to the inner side of the storage chamber,
The storage chamber includes an upper wall forming the storage space,
The upper wall is provided on the front side, and includes an upwardly inclined inclined portion,
The storage chamber includes an inner wall forming the storage space and a through hole formed in the inner wall,
It is a plastic material, and includes a sealing member covering the through hole,
The storage compartment includes a protective film provided on an outer surface, wherein the protective film comprises a first transparent adhesive layer in contact with the outer surface of the storage compartment, a transparent heating layer provided on the first transparent adhesive layer, and a second provided on the transparent heating layer. Including a transparent adhesive layer and a variable protective layer provided on the second transparent adhesive layer,
The first transparent adhesive layer and the second transparent adhesive layer are 100 parts by weight of an acrylic monomer composed of 70 to 99% by weight of butyl acrylate and 1 to 30% by weight of acrylonitrile, respectively, and a radical initiator 0.1 to Including 5 parts by weight and 0.01 to 20 parts by weight of a crosslinking agent,
The transparent heating layer includes Indium Tin Oxide,
The variable protective layer contains 3% calcium chloride and 0.5% ammonium persulfate in a first solution in which 3.84 g of N-isopropyl acrylamide (NIPAM) polymer and 1.25 g of sodium alginate are dissolved per 250 ml of distilled water, and 300 ml of distilled water. Containing a converting agent in which the second solution is mixed and a protecting agent containing 5 to 30 parts by weight of methyltrimethoxysilane, 20 to 75 parts by weight of colloidal alumina, and 30 parts by weight or less of isopropyl alcohol A beverage refrigerator, characterized in that. delete delete delete

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