Heat-generating resin composition and refrigerator comprising same

Abstract

A refrigerator according to an embodiment of the present disclosure may comprise: a body including a storage compartment; an ice-making assembly disposed inside the storage compartment; and a water supply member configured to supply water from an external water supply source to the ice-making assembly. At least a part of the ice-making assembly may be formed of a heat-generating resin composition that generates heat when electrical power is supplied. The heat-generating resin composition may include 17 to 40 wt% of a carbon filler and 60 to 83 wt% of an acrylonitrile butadiene styrene (ABS) resin.

Description

Heat-generating resin composition and refrigerator containing the same

[0001] Various embodiments of the present disclosure relate to a heat-generating resin composition and a refrigerator comprising the same.

[0002] Generally, a refrigerator is a device that cools and stores food using a refrigeration cycle consisting of a compressor, a condenser, an expansion valve, and an evaporator. The refrigerator may include an ice-making assembly located inside the storage compartment and configured to generate ice.

[0003] An ice-making assembly may include an ice-making tray forming a space for generating ice, an ejector separating ice from the ice-making tray, and an ice bucket formed to store the ice separated from the ice-making tray. The ice-making assembly may further include a control unit configured to control the entire ice-making process, thereby enabling the ice-making assembly to automatically generate ice and separate the generated ice.

[0004] The ice-making tray may include two trays arranged to be joined together. When the two trays are joined together, a space for generating ice may be formed.

[0005] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0006] A resin composition according to one embodiment may comprise 17 to 40 weight percent of carbon filler and the remainder of ABS (Acrylonitrile Butadiene Styrene) resin. In response to the application of voltage to the resin composition, heat may be generated by the electrical resistance of the resin composition.

[0007] According to one embodiment, the carbon filler may include carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), graphene, or a combination thereof.

[0008] According to one embodiment, the carbon fiber may be 85% to 97% by weight with respect to the total weight of the carbon filler.

[0009] According to one embodiment, the carbon black may be 1% to 5% by weight with respect to the total weight of the carbon filler.

[0010] According to one embodiment, the carbon nanotubes may be 1% to 5% by weight with respect to the total weight of the carbon filler.

[0011] According to one embodiment, the graphene may be 1% to 5% by weight with respect to the total weight of the carbon filler.

[0012] According to one embodiment, the resistance reduction rate of the resin composition may be 1% or less when voltage is repeatedly applied to and withdrawn from the resin composition for each corresponding time interval 200 times or more.

[0013] According to one embodiment, the carbon filler may be irregularly arranged within the resin composition without directionality.

[0014] A refrigerator according to one embodiment may include a main body including a storage compartment, an ice-making assembly disposed inside the storage compartment, and a water supply member configured to supply water to be made into ice from an external water source to the ice-making assembly. At least a portion of the ice-making assembly may include a resin composition. The resin composition may include 17 to 40 weight percent of carbon filler and the remainder being ABS (Acrylonitrile Butadiene Styrene). In response to the application of voltage to the resin composition, heat may be generated by the electrical resistance of the resin composition.

[0015] According to one embodiment, one or more components of the ice-making assembly configured to come into direct contact with water or ice during operation of the ice-making assembly may include the resin composition.

[0016] According to one embodiment, the ice-making assembly may include a first case comprising a first tray configured to form a first portion of ice made by the ice-making assembly, and a second case facing the first case and comprising a second tray configured to form a second portion of ice made by the ice-making assembly. At least one of the first case, the second case, the first tray, and the second tray may include the resin composition.

[0017] According to one embodiment, at least one of the first case, the second case, the first tray, and the second tray may further include a pair of electrode portions configured to receive power to apply voltage to the resin composition.

[0018] According to one embodiment, the ice-making assembly may include a cover housing and an input portion configured to guide water supplied from the water supply member into the inside of the cover housing. The input portion may be composed of the heat-generating resin composition.

[0019] According to one embodiment, the first part, which is one of the input part and the ice-making assembly, may be formed integrally. The integrally formed input part and the first part may each include the resin composition.

[0020] According to one embodiment, the input portion includes a first electrode portion, and the first portion may include a second electrode portion. The first electrode portion and the second electrode portion may be configured to receive power to apply voltage to the resin composition.

[0021] According to one embodiment, the device may further include a pair of first doors rotatably connected to the main body to open and close the storage chamber, and a rotating bar disposed between the pair of first doors, rotatably coupled to one of the pair of first doors and configured to prevent cold air leakage from the storage chamber. A portion of the rotating bar may include the resin composition.

[0022] According to one embodiment, the carbon filler may include carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), graphene, or a combination thereof.

[0023] According to one embodiment, the carbon fiber may be 85% to 97% by weight with respect to the total weight of the carbon filler.

[0024] According to one embodiment, the carbon black may be 1% to 5% by weight with respect to the total weight of the carbon filler, the carbon nanotube may be 1% to 5% by weight with respect to the total weight of the carbon filler, and the graphene may be 1% to 5% by weight with respect to the total weight of the carbon filler.

[0025] According to one embodiment, the carbon filler may be irregularly arranged within the resin composition without directionality.

[0026] The effects obtainable from the exemplary embodiments of the present disclosure are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the description below. That is, unintended effects resulting from the implementation of the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0027] FIG. 1 is a drawing illustrating a refrigerator among home appliances according to one embodiment.

[0028] FIG. 2 is an enlarged view of a part of the configuration of another refrigerator in one embodiment.

[0029] FIG. 3 illustrates an ice-making assembly included in a refrigerator according to one embodiment.

[0030] FIG. 4 is an exploded perspective view of an ice-making assembly according to one embodiment.

[0031] FIG. 5 is a flowchart illustrating the process of manufacturing a heat-generating injection molded product using a heat-generating resin composition according to one embodiment.

[0032] FIG. 6 is an experimental example in which the rate of change in resistance according to the difference in base resin in a heating resin composition according to one embodiment was measured.

[0033] FIG. 7 is an image showing the change in the arrangement of carbon fillers before and after voltage application in a heat-generating resin composition according to one embodiment, where the base resin is PA (Polyamide).

[0034] FIG. 8 is an image showing the change in the arrangement of carbon fillers before and after voltage application when the base resin in a heat-generating resin composition according to one embodiment is ABS (Acrylonitrile Butadiene Styrene).

[0035] FIG. 9 is a perspective view of the input section in an ice-making assembly of a refrigerator according to one embodiment.

[0036] FIG. 10 is a perspective view illustrating a case where some components (e.g., a first fixed frame) of an ice-making assembly of a refrigerator according to one embodiment are composed of a heat-generating resin composition.

[0037] FIG. 11 is a perspective view illustrating a case in which the input part and some components of an ice-making assembly of a refrigerator according to one embodiment are integrally formed and composed of a heat-generating resin composition.

[0038] FIG. 12 is a plan view of a first tray in an ice-making assembly of a refrigerator according to one embodiment.

[0039] FIG. 13 is an exploded perspective view of a rotating bar of a refrigerator according to one embodiment.

[0040] In the following description, the attached drawings are referenced, and specific examples of implementation are illustrated within the drawings. Additionally, other examples may be used and structural modifications may be made without departing from the scope of the various examples.

[0041] The various embodiments used to illustrate the principles of the present disclosure in FIGS. 1 through 13 disclosed below and in this patent document are for illustrative purposes only and should not be construed as limiting the scope of the present disclosure in any way. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any system or device appropriately arranged.

[0042] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0043] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0044] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0045] In the present disclosure, each of the phrases such as “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “at least one of A, B, or C” may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0046] The term “and / or” includes a combination of multiple related described components or any of the multiple related described components.

[0047] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another corresponding component and do not limit the components in other aspects (e.g., importance or order).

[0048] Additionally, terms such as 'front,' 'rear,' 'top,' 'bottom,' 'side,' 'left,' 'right,' 'top,' and 'bottom' used in this disclosure are defined based on the drawings, and the shape and location of each component are not limited by these terms.

[0049] Terms such as “include” or “have” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this disclosure, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0050] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0051] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0052] A refrigerator according to one embodiment may include a main body.

[0053] The “main body” may include an inner housing, an outer housing disposed on the outside of the inner housing, and an insulating material provided between the inner housing and the outer housing.

[0054] The “inner housing” may include at least one of a case, plate, panel, or liner forming a storage chamber. The inner housing may be formed as a single body or may be formed by assembling multiple plates. The “outer housing” may form the exterior of the main body and may be coupled to the outside of the inner housing so that an insulating material is placed between the inner housing and the outer housing.

[0055] The “insulating material” can insulate the interior and exterior of the storage room so that the temperature inside the storage room is maintained at a set appropriate temperature without being affected by the external environment. According to one embodiment, the insulating material may include a foamed insulating material. The foamed insulating material can be formed by injecting and foaming urethane foam, which is a mixture of polyurethane and a foaming agent, between an inner housing and an outer housing.

[0056] According to one embodiment, the insulation material may additionally include a vacuum insulation material in addition to a foam insulation material, or the insulation material may consist solely of a vacuum insulation material instead of a foam insulation material. The vacuum insulation material may include a core material and an outer shell material that accommodates the core material and seals the interior under vacuum or near-vacuum pressure. However, the insulation material is not limited to the foam insulation material or vacuum insulation material described above and may include various materials that can be used for insulation.

[0057] The "storage room" may include a space defined by an internal housing. The storage room may further include an internal housing that defines a space corresponding to the storage room. Various items such as food, medicine, and cosmetics may be stored in the storage room, and the storage room may be formed so that at least one side is open to allow for the retrieval and retrieval of items.

[0058] A refrigerator may include one or more storage compartments. When two or more storage compartments are formed in a refrigerator, each storage compartment may have a different use and may be maintained at a different temperature. To this end, each storage compartment may be partitioned from one another by a partition containing insulation.

[0059] The storage room may be provided to be maintained within an appropriate temperature range according to its intended use and may include a "refrigeration room," "freezing room," or "variable temperature room" distinguished according to its intended use and / or temperature range. The refrigerator room may be maintained at a temperature suitable for refrigerated storage of goods, and the freezer room may be maintained at a temperature suitable for frozen storage of goods. "Refrigeration" may mean cooling goods to a temperature that does not freeze them; for example, the refrigerator room may be maintained within a range of 0°C to 7°C. "Freezing" may mean cooling goods to freeze them or to maintain them in a frozen state; for example, the freezer room may be maintained within a range of -20°C to -1°C. The variable temperature room may be used as either a refrigerator room or a freezer room, with or without the user's choice.

[0060] Storage rooms may be referred to by various names, such as "vegetable room," "fresh room," "cooling room," and "ice-making room," in addition to terms like "refrigeration room," "freezing room," and "variable temperature room." The terms "refrigeration room," "freezing room," and "variable temperature room" used below should be understood as encompassing storage rooms with corresponding uses and temperature ranges.

[0061] According to one embodiment, the refrigerator may include at least one door configured to open and close one side of the storage compartment. The door may be provided to open and close each of one or more storage compartments, or a single door may be provided to open and close multiple storage compartments. The door may be installed to be rotatable or sliding on the front of the main body.

[0062] The “door” may be configured to seal the storage room when the door is closed. The door may include insulation material, similar to the main body, to insulate the storage room when the door is closed.

[0063] According to one embodiment, the door may include a door outer panel forming the front of the door, a door inner panel forming the rear of the door and facing the storage room, an upper cap, a lower cap, and a door insulation material provided inside the same.

[0064] A gasket may be provided on the edge of the door inner panel to seal the storage compartment by adhering to the front of the main body when the door is closed. The door inner panel may include a dyke that protrudes rearward to allow a door basket for storing items to be mounted.

[0065] According to one embodiment, the door may include a door body and a front panel detachably coupled to the front side of the door body and forming the front of the door. The door body may include a door outer panel forming the front of the door body, a door inner panel forming the rear of the door body and facing the storage compartment, an upper cap, a lower cap, and a door insulation material provided inside them.

[0066] Refrigerators can be classified into French Door Type, Side-by-side Type, BMF (Bottom Mounted Freezer), TMF (Top Mounted Freezer), or 1-door refrigerators depending on the arrangement of the door and storage compartment.

[0067] According to one embodiment, the refrigerator may include a cold air supply device arranged to supply cold air to the storage compartment.

[0068] The “cold air supply device” may include a machine, apparatus, electronic device, and / or a system combining these that can generate cold air and guide cold air to cool a storage room.

[0069] According to one embodiment, a cold supply device can generate cold air through a refrigeration cycle that includes the processes of compression, condensation, expansion, and evaporation of a refrigerant. To this end, the cold supply device may include a refrigeration cycle device having a compressor, a condenser, an expansion device, and an evaporator capable of driving the refrigeration cycle. According to one embodiment, the cold supply device may include a semiconductor such as a thermoelectric element. The thermoelectric element can cool a storage chamber through heat generation and cooling action via the Peltier effect.

[0070] According to one embodiment, the refrigerator may include a machine room arranged to accommodate at least some parts belonging to a cold air supply device.

[0071] The “machine room” may be configured to be partitioned and insulated from the storage room to prevent heat generated from components placed in the machine room from being transferred to the storage room. The interior of the machine room may be configured to communicate with the exterior of the main body to dissipate heat from components placed inside the machine room.

[0072] According to one embodiment, the refrigerator may include a dispenser provided on the door to provide water and / or ice. The dispenser may be provided on the door so that it is accessible to a user without opening the door.

[0073] According to one embodiment, the refrigerator may include an ice-making device configured to generate ice. The ice-making device may include an ice-making tray that stores water, an ice-removing device that separates ice from the ice-making tray, and an ice bucket that stores the ice generated from the ice-making tray.

[0074] According to one embodiment, the refrigerator may include a control unit for controlling the refrigerator.

[0075] The “control unit” may include a memory that stores or remembers a program and / or data for controlling a refrigerator, and a processor that outputs a control signal for controlling a cold air supply device, etc., according to the program and / or data stored in the memory.

[0076] The memory stores or records various information, data, commands, programs, etc., necessary for the operation of the refrigerator. The memory can store temporary data generated while generating control signals to control the components included in the refrigerator. The memory may include at least one of volatile memory or non-volatile memory, or a combination thereof.

[0077] The processor controls the overall operation of the refrigerator. The processor can control the components of the refrigerator by executing programs stored in memory. The processor may include a separate NPU that performs the operation of an artificial intelligence model. Additionally, the processor may include a central processing unit, a graphics processing unit (GPU), etc. The processor can generate control signals to control the operation of the cold air supply unit. For example, the processor can receive temperature information of the storage compartment from a temperature sensor and generate a cooling control signal to control the operation of the cold air supply unit based on the temperature information of the storage compartment.

[0078] Additionally, the processor can process user input of the user interface and control the operation of the user interface according to programs and / or data stored in memory. The user interface may be provided using an input interface and an output interface. The processor can receive user input from the user interface. Additionally, the processor can transmit display control signals and image data to the user interface to display an image on the user interface in response to the user input.

[0079] The processor and memory may be provided as a single unit or separately. The processor may include one or more processors. For example, the processor may include a main processor and at least one sub-processor. The memory may include one or more memory units.

[0080] According to one embodiment, the refrigerator may include a processor and memory that control all components included in the refrigerator, and may include a plurality of processors and a plurality of memories that individually control the components of the refrigerator. For example, the refrigerator may include a processor and memory that control the operation of a cold air supply device according to the output of a temperature sensor. Additionally, the refrigerator may separately provide a processor and memory that control the operation of a user interface according to user input.

[0081] The communication module can communicate with external devices, such as servers, mobile devices, and other home appliances, through nearby Access Points (APs). The Access Point (AP) can connect the Local Area Network (LAN) to which the refrigerator or user device is connected to the Wide Area Network (WAN) to which the server is connected. The refrigerator or user device can be connected to the server through the Wide Area Network (WAN).

[0082] The input interface may include keys, touchscreens, microphones, etc. The input interface may receive user input and transmit it to the processor.

[0083] The output interface may include a display, a speaker, etc. The output interface can output various notifications, messages, information, etc. generated by the processor.

[0084] FIG. 1 is a drawing illustrating a refrigerator among home appliances according to one embodiment.

[0085] FIG. 2 is an enlarged view of a part of the configuration of another refrigerator in one embodiment.

[0086] All features, components, and / or arrangement relationships between components illustrated in FIGS. 1 and 2 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 3 through 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 1 and 2.

[0087] The refrigerator (100) illustrated in FIG. 1 is a refrigerator illustrated for convenience of explanation, and the scope of the present disclosure is not limited by the configuration and shape of the illustrated refrigerator.

[0088] Referring to FIGS. 1 and 2, the refrigerator (100) may include a main body (110), a storage compartment (120), a door (130), or a cold air supply device. The refrigerator (100) of FIG. 1 is illustrated for convenience of explanation, and the scope of the present disclosure is not limited to the shape of the illustrated refrigerator (100).

[0089] The storage room (120) may be partitioned, for example, inside the main body (110) and formed into multiple spaces. The door (130) may be arranged, for example, at the front of the main body (110) to open and close the storage room (120). A cold air supply device may be provided, for example, inside the main body (110) to supply cold air to the storage room (120).

[0090] According to one embodiment, the main body (110) may include an inner housing (111) or an outer housing (112). The inner housing (111) may, for example, form the exterior of the storage room (120). The inner housing (111) may, for example, have a plastic material and be integrally injection molded. The outer housing (112) may, for example, form at least a part of the exterior of the refrigerator (100). The outer housing (112) may, for example, be made of a metal material with excellent durability and aesthetic appeal. A receiving space may be formed between the outer housing (112) and the inner housing (111). A part of the receiving space may include a main body insulation material (not shown) that insulates the storage room (120).

[0091] According to one embodiment, a cold air supply device can generate cold air using a cooling circulation cycle that compresses, condenses, expands, and evaporates a refrigerant. The cold air supply device may be referred to, for example, as a heat pump.

[0092] According to one embodiment, the main body (110) may form a storage room (120). According to one embodiment, the storage room (120) may be divided into multiple sections by partitions (114). That is, the storage room (120) may be formed by the internal housing (111) of the main body (110) and the partitions (114). Inside the storage room (120), a plurality of shelves (124) or storage containers (125) may be arranged to store food or the like. The plurality of shelves (124) and storage containers (125) may be arranged so as to be separable, for example.

[0093] According to one embodiment, the storage room (120) may be divided into a plurality of storage rooms (121, 122, 123) by a partition (114). For example, the storage room (120) may include one first storage room (121) located at the top (e.g., upper storage room) and two second storage rooms (122) (e.g., lower storage rooms) and a third storage room (123) (e.g., lower storage rooms) located at the bottom, as illustrated. The first storage room (121) may be, for example, a refrigerator room. The second storage room (122) and the third storage room (123) may be, for example, freezer rooms.

[0094] According to one embodiment, the partition wall (114) may include a first partition wall (1141) and a second partition wall (1142). The partition wall (114) may, for example, have a T-shaped cross-section. The first partition wall (1141) may be arranged horizontally to partition, for example, the first storage room (121) and the second and third storage rooms (122, 123). The second partition wall (1142) may be arranged vertically to partition, for example, the second storage room (122) and the third storage room (123). The second partition wall (1142) may be formed to protrude downward from the first partition wall (1141), for example. The illustrated second partition (1142) is formed protruding from the center of the first partition (1141), but is not limited thereto, and the size of the second storage room (122) and the third storage room (123) may vary depending on the position of the second partition (1142). The first partition (1141) and the second partition (1142) may be formed as a single unit.

[0095] Among the illustrated storage rooms (120), the first storage room (121) can be used as a refrigerator, and the second and third storage rooms (122, 123) can be used as freezers, but are not limited thereto, and the location and number of each refrigerator and freezer room can be varied according to the user's needs.

[0096] Additionally, the number, size, or shape of the storage rooms (120) may vary depending on the shape or location of the partition (114). The freezer room may be maintained at approximately minus 20 degrees, and the refrigerator room may be maintained at approximately plus 3 degrees. The storage rooms (120) may be insulated, for example, by the partition (114).

[0097] According to some embodiments, the storage room (120) may be divided into left and right sections by a single vertical partition. Here, the vertical partition may be formed such that one end contacts the upper part of the inner housing (111) and the other end contacts the lower part of the inner housing (111). Depending on the position of the vertical partition, the size of the storage room (120) divided into left and right sections may vary. For example, the vertical partition may be provided in the center so that the storage room (120) divided into left and right sections is provided in a mirror-symmetric manner. According to some embodiments, there may be multiple vertical partitions. If there are multiple vertical partitions, three or more storage rooms (120) may be formed in the left and right directions.

[0098] According to some embodiments, the storage room (120) may be divided vertically only by a single horizontal partition. That is, the storage room (120) may be divided into two parts, an upper storage room and a lower storage room. Here, the horizontal partition may be formed such that one end contacts the left side of the inner housing (111) and the other end contacts the right side of the inner housing (111). Depending on the position of the horizontal partition, the size of the vertically divided storage room (120) may vary. According to some embodiments, there may be multiple horizontal partitions. If there are multiple horizontal partitions, three or more storage rooms (120) may be formed in the vertical direction.

[0099] In addition to the above-described embodiment, a plurality of storage rooms (120) of various shapes can be configured depending on the shape and number of partitions (114).

[0100] According to one embodiment, the door (130) may include a first door (131) (e.g., upper door) or a second door (132) (e.g., lower door) as illustrated. The door (130) may be arranged to open and close, for example, an opening (110a) of the main body (110). The first door (131) may be configured as a pair (e.g., double door) to open and close the first storage room (121), for example. The second door (132) may be configured as a pair (e.g., double door) to open and close the second storage room (122) or the third storage room (123), for example. In addition, the number and shape of the door (130) may vary in correspondence with the number and shape of the storage room (120), and the door (130) may be configured to rotate around the hinge (116) as well as to slide.

[0101] According to one embodiment, a rotating bar (1316) may be provided on one of a pair of first doors (131). The rotating bar (1316) may be positioned, for example, on the side opposite to the side forming the axis of rotation in one of the pair of first doors (131). The rotating bar (1316) may be positioned, for example, so that the axis of rotation is fixed to the side of one of the pair of first doors (131) and can rotate around the axis of rotation. The rotating bar (1316) may be positioned, for example, in the center of the front of the main body (110) when one of the pair of first doors (131) is closed. The rotating bar (1316) may seal the gap between the pair of first doors (131) when the pair of first doors (131) are closed. The main body (110) may be provided with a rotating bar guide (115) that guides the movement of the rotating bar (1316) when one of the pair of first doors (131) is closed.

[0102] According to one embodiment, the door (130) (e.g., first door (131) or second door (132)) may include a door panel (130a) or a door body (130b). The door panel (130a) and the door body (130b) may be joined so as to be separable.

[0103] The door body (130b) may, for example, be fixed to the main body (110) by a hinge (116) on one side. Thus, the door body (130b) may be positioned to be rotatable relative to the main body (110). The door panel (130a) may, for example, form part of the front exterior of the refrigerator (100). The door panel (130a) may be an important aesthetic element, particularly when the refrigerator (100) is placed indoors. Accordingly, the user may customize the front exterior of the refrigerator (100) as desired by replacing the door panel (130a) with one having a different color or design. According to some embodiments, the door panel (130a) and the door body (130b) may be formed as a single unit.

[0104] For convenience of explanation, only one first door (131) and one second door (132) are described below, and the description of the remaining first door (131) and the remaining second door (132) is omitted. However, the first door (131) and the second door (132) for which the description is omitted may each have a configuration approximately identical to that of the first door (131) and the second door (132) described below, except that they are arranged in a mutual mirror-symmetrical manner. Additionally, the second door (132) may have a configuration identical to that of the first door (131), and a detailed description may be omitted.

[0105] According to one embodiment, the first door (131) may include a first door handle (not shown), a first door shelf (1313), a first shelf support (1314), or a first gasket (1315). The first door (131) may be rotatably coupled to the main body (110), for example, to open and close at least a portion of the first storage room (121). A user may open and close the first door (131) using the first door handle. The first door handle may be formed as a recess on the bottom surface of the first door (131) or as a protrusion on the front surface of the first door (131), but is not limited thereto.

[0106] The first door shelf (1313) may be positioned to store food, for example. On both the left and right sides of the first door shelf (1313), a first shelf support (1314) may be positioned to support the first door shelf (1313). The first shelf support (1314) may be formed to extend vertically from the first door (131), for example. That is, the first shelf support (1314) may be positioned to protrude rearward from the back surface of the first door (131) and extend in the vertical direction. The first shelf support (1314) may be positioned detachably on the first door (131) as a separate component, for example, or may be formed integrally. The first shelf support (1314) may be formed to protrude rearward from the rear surface of the door body (130b), for example.

[0107] The first gasket (1315) may be provided to wrap around the back edge of the first door (131), for example. Specifically, the first gasket (1315) may be provided to wrap around the edge of the door body (130b). The first gasket (1315) may be provided to seal the gap with the main body (110) when the first door (131) is closed.

[0108] According to one embodiment, the second door (132) may include a second door handle (1321) or a second gasket (1322). The second door (132) may be rotatably coupled to the main body (110), for example, to open and close the second storage room (122) or the third storage room (123). A user may open and close the second door (132) using the second door handle (1321). The second door handle (1321) may be formed as a recess on the upper surface of the second door (132) or as a protrusion on the front surface of the second door (132), but is not limited thereto.

[0109] The second gasket (1322) may be positioned to wrap around the back edge of the second door (132), for example. The second gasket (1322) may be positioned to seal the gap with the main body (110) when the second door (132) is closed.

[0110] Although not illustrated, the second door (132) may further include a configuration that is wholly or partially identical to the first door shelf (1313) and the first shelf support (1314) of the first door (131).

[0111] According to one embodiment, the refrigerator (100) may further include an ice-making assembly (200). According to one embodiment, an ice-making assembly (200) for generating ice using the cold air of the second storage room (122) may be disposed on one side of the second storage room (122) (e.g., freezer room). Additionally, an ice bucket (160) provided to store the ice generated from the ice-making assembly (200) may be mounted on a mounting frame (170).

[0112] According to one embodiment, the ice making assembly (200) can produce ball-shaped ice. However, it is not limited thereto, and ice of various shapes can be produced in correspondence with the shape of the space formed by the trays included in the ice making assembly (200) (e.g., the first tray (270) and the second tray (370) of FIG. 3).

[0113] According to one embodiment, the refrigerator (100) may further include a water supply member (150). The water supply member (150) may be formed to receive and deliver water from an external water source. For example, the water supply member (150) may be formed to receive water from the outside and deliver it into the ice-making assembly (200). The water supply member (150) may pass through the internal housing (111) of the refrigerator (100) and communicate with the storage room (120). To this end, a portion of the water supply member (150) may be embedded in an insulating material, and one end of the water supply member (150) may be positioned to be exposed to the storage room (120) of the refrigerator (100).

[0114] According to one embodiment, in order to increase the transparency of the ice and create an ice shape close to a spherical shape during the process of the ice making assembly (200) making ice, the ice making assembly (200) of the present disclosure may include buffer cells (e.g., the first buffer cell (275) and the second buffer cell (375) of FIG. 4) formed in the first tray (270) and the second tray (370). The buffer cell (275) may be located below the ice making cell (e.g., the first ice making cell (272) and the second ice making cell (372) of FIG. 4) formed to make ball ice. The buffer cells (275, 375) may form a space in which water supplied from the water supply member (150) to the ice making assembly (200) is primarily stored. When a certain amount of water is stored in the buffer cell (275, 375), water can be moved from the buffer cell (275, 375) to the ice-making cell (272, 372).

[0115] According to one embodiment, when ice is generated in the ice-making assembly (200), the ice-making assembly (200) may have a heating function to easily remove the ice formed on the first tray (270) and the second tray (370) and to easily remove the ice pieces remaining on the first tray (270) and the second tray (370) (hereinafter referred to as residual ice).

[0116] According to one embodiment, some of the components formed by injection molding in the refrigerator (100) may be composed of an injection molded product that generates heat when power is applied. The injection molded product that generates heat may include a heat-generating resin composition to be described later. For example, by manufacturing the injection molded product around the part where a heating device (or heater) is placed among the components of the refrigerator (100) using the heat-generating resin composition, the heater can be omitted, thereby reducing the manufacturing cost. In addition, during the process of assembling the heater, the assembly state varied depending on the worker's skill level and there were cases of defective assembly; however, in the present disclosure, the defect rate in the manufacturing process can be minimized by omitting the heater and using an injection molded product utilizing the heat-generating resin composition. Furthermore, as described later, even when power is repeatedly applied to the injection molded product utilizing the heat-generating resin composition according to one embodiment, the rate of change in resistance is very low, allowing for high durability.

[0117] FIG. 3 illustrates an ice-making assembly included in a refrigerator according to one embodiment.

[0118] FIG. 4 is an exploded perspective view of an ice-making assembly according to one embodiment.

[0119] All features, components, and / or arrangement relationships between components illustrated in FIGS. 3 and 4 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 and 2 and FIGS. 5 through 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 3 and 4.

[0120] Referring to FIGS. 3 and 4, the ice-making assembly (200) may include a cover housing (220). The cover housing (220) may be provided to be coupled with the ice-making housing (210) inside the ice-making housing (e.g., the ice-making housing (210) of FIG. 2). The cover housing (220) may be provided in a box shape with approximately one side and the bottom open.

[0121] According to one embodiment, the cover housing (220) may be positioned to form the overall appearance of the ice-making assembly (200) and to surround the first block (201) and the second block (202). The cover housing (220) may include a main housing (223) and an upper cover (221) positioned above the main housing (223).

[0122] According to one embodiment, the main housing (223) may form a box-shaped space for accommodating the first block (201) and the second block (202). For example, the main housing (223) may be formed such that the front and rear directions (e.g., x1 or x2 directions) through which the first block (201) and the second block (202) move are open, and the lower direction (e.g., z2 direction) through which ice produced in the ice-making assembly (200) is removed is open.

[0123] According to one embodiment, the ice-making assembly (200) may include an input section (230). The input section (230) may be mounted on one side of the cover housing (220). For example, the input section (230) may be mounted on the upper side of the upper cover (221). The input section (230) may guide water supplied from the water supply member (150) to move into the interior of the cover housing (220). In other words, the input section (230) may be provided to allow water supplied from the water supply member (150) to move into the space formed by the first tray (270) and the second tray (370).

[0124] According to one embodiment, the ice-making assembly (200) may include a cover housing (220), a first block (201) and a second block (202) that are positioned to be fixed to the cover housing (220) and formed to move mutually. The ice-making assembly (200) may further include a first pressing part (250) configured to press the first block (201) and a second pressing part (350) configured to press the second block (202).

[0125] According to one embodiment, the first block (201) may include a first case (240), a first tray (270) disposed to be received in the first case (240), and a first fixing frame (290) formed to fix the first case (240) and the first tray (270).

[0126] According to one embodiment, the second block (202) may include a second case (340), a second tray (370) disposed to be received in the second case (340), and a second fixing frame (390) formed to fix the second case (340) and the second tray (370).

[0127] According to one embodiment, the ice-making assembly (200) can form an ice-making space by moving a first block (201) and a second block (202) that are arranged to face each other. For example, an ice-making space for forming ball ice can be formed by the first block (201) and the second block (202) coming into close contact with each other.

[0128] According to one embodiment, the ice making assembly (200) may be configured such that the first block (201) and the second block (202) are separated from each other in order to remove the manufactured ice and store it in the ice bucket (160). For example, during the process of the first block (201) and the second block (202) being separated and separated, the first pressurizing unit (250) and the second pressurizing unit (350) may be configured to press the first tray (270) and the second tray (370), respectively, and to remove the ice (e.g., ball ice and buffer ice) formed in the ice making space.

[0129] According to one embodiment, the first case (240) may be disposed on one side of the cover housing (220). For example, the first case (240) may be formed integrally with the cover housing (220) or configured separately and disposed to be coupled to one side of the cover housing (220).

[0130] According to one embodiment, the first pressurizing member (250) may be formed to press the first tray (270). For example, the first pressurizing member (250) may press the first tray (270) to remove ice.

[0131] According to one embodiment, the first pressurizing member (250) may include a body (251) and a first ejecting pin (252) and a second ejecting pin (255) formed to protrude from the body (251) toward the first tray (270) (e.g., in the x2 direction). For example, the first ejecting pin (252) may be formed to pressurize the first ice-making cell (272). For example, the second ejecting pin (255) may be formed to pressurize the first buffer cell (275).

[0132] According to one embodiment, the first pressure member (250) may further include a leg (253). The leg (253) may be disposed on each side of the body (251). For example, the leg (253) may be disposed parallel to the direction of movement of the first pressure member (250) (e.g., in the x1 or x2 direction). The leg (253) may be disposed on both sides of the cover housing (220) and connected to one side of the second case (340).

[0133] According to one embodiment, the first tray (270) may be placed inside the ice-making housing (210). For example, the first tray (270) may be mounted inside the cover housing (220).

[0134] According to one embodiment, the first tray (270) may be made of an elastic material. For example, the first tray (270) may be composed of a material including at least one of silicone, synthetic rubber, and urethane.

[0135] According to one embodiment, the first tray (270) may receive water from a water supply member (150). The first tray (270) may include a guide member (271) so that the water supplied from the water supply member (150) flows into an ice-making cell inside the first tray (270) through an inlet member (230). The guide member (271) may be formed on the upper side of the first tray (270).

[0136] According to one embodiment, the first tray (270) may include a first ice cell (272) provided to form a portion of ice. The first ice cell (272) may be formed by indenting or removing a portion of the first tray (270). For example, the first ice cell (272) may be provided in a shape approximately hemispherical. Although the first ice cell (272) has been illustrated and described as being provided in three, it is not limited to what is illustrated, and the number of first ice cells (272) is not limited thereto.

[0137] According to one embodiment, the first tray (270) may include a first buffer cell (275). The first buffer cell (275) may be positioned below the first ice-making cell (272). The first buffer cell (275) may be connected to the first ice-making cell (272) by a first bridge (273). By connecting the first ice-making cell (272) and the first buffer cell (275) by the first bridge (273), water supplied from the water supply member (150) can move from the first buffer cell (275) toward the first ice-making cell (272).

[0138] According to one embodiment, the first fixed frame (290) can be formed to combine the first tray (270) with the first case (240). For example, the first fixed frame (290) can be fixed to one side of the cover housing (220) in a combined state with the first tray (270) and the first case (240).

[0139] According to one embodiment, the first fixed frame (290) may be formed to support the edge of the first tray (270). The first fixed frame (290) can reinforce the insufficient rigidity of the first tray (270) because the material of the first tray (270) is composed of an elastic material.

[0140] According to one embodiment, the second block (202) may be movably provided inside the cover housing (220).

[0141] According to one embodiment, the second block (202) may include a second case (340), a second tray (370) disposed to be received in the second case (340), a second pressing part (350) formed to press the second tray (370), and a second fixing frame (390) formed to fix the second case (340) and the second tray (370).

[0142] According to one embodiment, each component included in the second block (202) (e.g., second case (340), second tray (370), second pressure part (350), and second fixed frame (390)) may correspond to each component included in the first block (201). For example, the second case (340) may correspond to the first case (240). For example, the second tray (370) may correspond to the first tray (270). For example, the second pressure part (350) may correspond to the first pressure part (250). For example, the second fixed frame (390) may correspond to the first fixed frame (290). Each of the components included in the second block (202) may have substantially the same shape and function as each component included in the first block (201). Accordingly, the description of each configuration included in the first block (201) may be applied to each configuration included in the second block (202).

[0143] According to one embodiment, the second case (340) may be formed on one side of the cover housing (220). For example, the second case (340) may be formed integrally with the cover housing (220) or configured separately and arranged to be coupled to one side of the cover housing (220).

[0144] According to one embodiment, the second case (340) can accommodate the second tray (370). For example, the second case (340) may include a second tray receiving portion formed to accommodate the second tray (370).

[0145] According to one embodiment, the second pressurizing member (350) may be formed to press the second tray (370). For example, the second pressurizing member (350) may press the second tray (370) to remove ice.

[0146] According to one embodiment, the second pressurizing member (350) may include a body (351) and a first ejecting pin (352) and a second ejecting pin (355) formed to protrude from the body (351) toward the second tray (370) (e.g., in the x1 direction). For example, the first ejecting pin (352) may be formed to press the second ice-making cell (372). For example, the second ejecting pin (355) may be formed to press the second buffer cell (375).

[0147] According to one embodiment, the second tray (370) may be placed inside the ice-making housing (210). For example, the second tray (370) may be mounted inside the cover housing (220).

[0148] According to one embodiment, the second tray (370) may be made of an elastic material. For example, the second tray (370) may be composed of a material including at least one of silicone, synthetic rubber, and urethane.

[0149] According to one embodiment, the second tray (370) may receive water from the water supply member (150). The second tray (370) may include a guide member (371) so that the water supplied from the water supply member (150) flows into the ice-making cell inside the second tray (370) through the input member (230). The guide member (371) may be formed on the upper side of the second tray (370).

[0150] According to one embodiment, the second tray (370) may include a second ice cell (372) provided to form a portion of ice. The second ice cell (372) may be formed by indenting or removing a portion of the second tray (370). For example, the second ice cell (372) may be provided in a shape approximately hemispherical. Although the second ice cell (372) has been illustrated and described as being provided in three numbers, it is not limited to what is illustrated, and the number of second ice cells (372) is not limited thereto.

[0151] According to one embodiment, the second tray (370) may include a second buffer cell (375). The second buffer cell (375) may be positioned below the second ice-making cell (372). The second buffer cell (375) may be connected to the second ice-making cell (372) by a second bridge. By connecting the second ice-making cell (372) and the second buffer cell (375) by the second bridge, water supplied from the water supply member (150) can move from the second buffer cell (375) toward the second ice-making cell (372).

[0152] According to one embodiment, the second fixed frame (390) may be formed to combine the second tray (370) with the second case (340). For example, the second fixed frame (390) may be fixed to one side of the cover housing (220) with the second tray (370) and the second case (340) combined.

[0153] According to one embodiment, the second fixed frame (390) may be formed to support the edge of the second tray (370). The second fixed frame (390) can reinforce the insufficient rigidity of the second tray (370) because the material of the second tray (370) is composed of an elastic material.

[0154] According to one embodiment, the ice-making assembly (200) may further include a driving unit (400), a pinion (410), a bar (420), a rack gear (430), and an elastic member.

[0155] According to one embodiment, the driving unit (400) may be configured to generate power. For example, various electrical components, such as a motor and a circuit board, may be placed inside the driving unit (400). For example, the driving unit (400) may be coupled to the cover frame (220).

[0156] For example, the pinion (410) may be formed to be coupled to the drive unit (400) to transmit power generated from the drive unit (400). For example, the pinion (410) may be provided as a pair. The pair of pinions (410) may be connected by a bar (420). For example, the pair of pinions (410) may be connected to each side of the bar (420). The pinion (410) may be formed to rotate according to the drive of the drive unit (400). For example, the pinion (410) may be provided in a toothed shape to mesh with the rack gear (430).

[0157] According to one embodiment, the rack gear (430) may be formed to be movable relative to the cover housing (220). For example, the rack gear (430) may be moved linearly based on the rotational movement of the pinion (410).

[0158] According to one embodiment, the rack gear (430) may include a support portion supported by the cover housing (220) and a tooth portion formed on the upper surface of the support portion. For example, the rack gear (430) may be configured to move in a horizontal direction (e.g., x1 or x2 direction) relative to the cover housing (220) by engaging the tooth portion of the rack gear (430) with respect to the pinion (410).

[0159] According to one embodiment, the pinion (410) and the rack gear (430) mesh to convert the rotational motion of the drive unit (300) into linear motion. However, the structure is not limited to the illustrated structure, and various structures capable of converting rotational motion into linear motion may be applied.

[0160] According to one embodiment, an elastic member may be provided to connect the rack gear (430) and the second case (340). That is, the rack gear (430) and the second case (340) may be connected by the elastic member. For example, the elastic member may be implemented as a coil spring, but is not limited thereto and may be implemented in various configurations that provide elastic force in a predetermined direction.

[0161] According to one embodiment, as the rack gear (430) moves by receiving power from the drive unit (400), the second case (340) can move horizontally relative to the cover housing (220) (e.g., in the x1 or x2 direction). For example, the second tray (370) and the second case (340) can move linearly relative to the cover housing (220) by the rack gear (430).

[0162] According to one embodiment, the movement of the second case (340) is such that it moves integrally with the second tray (370) and the second fixed frame (390), and the second tray (370) can move horizontally relative to the first tray (270). As a result, the first block (201) and the second block (202) can move relative to each other so as to be in close contact or separated during the ice-making and ice-removing processes.

[0163] According to one embodiment, at least some components of the ice-making assembly (200) may be composed of a heat-generating resin composition that generates heat by an electric supply. Some of the parts injection-formed in the ice-making assembly (200) may be composed of a heat-generating resin composition that generates heat by an electric supply. Herein, the composition of the heat-generating resin composition and the method of manufacturing a heat-generating injection-molded product using the same are specifically described in FIGS. 5 to 8.

[0164] According to one embodiment, at least some parts of the ice-making assembly (200) that come into direct contact with water or ice may be composed of a heat-generating resin composition. For example, the input part (230), the first tray (270), and / or the second tray (370) of the ice-making assembly (200) may be composed of an injection-molded product that generates heat when power is applied. However, this is not limited thereto, and parts capable of indirectly transferring heat to water or ice at a location where parts in contact with water or ice can be heated may also be composed of a heat-generating resin composition. Here, the composition of the heat-generating resin composition and the method of manufacturing a heat-generating injection-molded product using the same are described in detail in FIGS. 5 to 8.

[0165] According to one embodiment, at least one of the first tray (270) and the second tray (370) composed of a heating resin composition may form a pair of electrode portions. A wire may be connected to the pair of electrode portions to apply power to at least one of the first tray (270) and the second tray (370).

[0166] According to one embodiment, an ice-making assembly (200) comprising a configuration formed by injection molding using a heating resin composition can reduce manufacturing costs by omitting a heater and generating heat using the injection molded product. In addition, as described below, using a heating resin composition according to one embodiment, the rate of change in resistance is very low even when power is repeatedly applied, so high durability can be achieved.

[0167] FIG. 5 is a flowchart illustrating the process of manufacturing a heat-generating injection molded product using a heat-generating resin composition according to one embodiment.

[0168] All features, components, and / or arrangement relationships between components illustrated in FIG. 5 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 4 and FIG. 5 through 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 5.

[0169] Referring to FIG. 5, the process of manufacturing a heat injection molded product may include a base resin preparation process (510), a resin pallet manufacturing process (520), and an injection molding process (530).

[0170] According to one embodiment, in the process (510) for preparing the base resin, the base resin may be an ABS (Acrylonitrile Butadiene Styrene) resin. In addition to ABS resin, PA (Polyamide) or PP (Polypropylene) may be used as the base resin for the injection molded product, but in the present disclosure, only ABS resin may be used as the base resin to manufacture the injection molded product.

[0171] According to one embodiment, the content of the base resin, ABS resin, may be 70 to 83 weight percent.

[0172] According to one embodiment, in the process (520) for manufacturing a heating resin palette, a carbon filler may be mixed into the base resin. Here, the carbon filler may include at least one of carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), and graphene.

[0173] According to one embodiment, the carbon filler content may be 17 to 40 weight percent. If the carbon filler content is less than 17 weight percent, it may be difficult to maintain the shape as an injection molded product. If the carbon filler content exceeds 40 weight percent, the rigidity of the injection molded product may decrease.

[0174] According to one embodiment, carbon fibers may be included in an amount of 85% to 97% by weight with respect to 100% by weight of carbon filler. Carbon black may be included in an amount of 1% to 5% by weight with respect to 100% by weight of carbon filler. Carbon nanotubes may be included in an amount of 1% to 5% by weight with respect to 100% by weight of carbon filler. Graphene may be included in an amount of 1% to 5% by weight with respect to 100% by weight of carbon filler.

[0175] According to one embodiment, the manufactured heating resin pallet can be dried at approximately 80 degrees Celsius for about 2 hours.

[0176] According to one embodiment, in an injection molding process (530), a heating injection molded product can be formed using a heating resin pallet. The heating injection molded product may be, for example, at least one injection molded product included in a refrigerator (e.g., refrigerator (100) of FIG. 1). For example, a part of an ice-making assembly (e.g., ice-making assembly (200) of FIG. 2) may be injection molded using the process of FIG. 5.

[0177] The heat-generating injection molded product manufactured through the process of FIG. 5 can be provided to replace the part where the heating device (or heater) was provided in the refrigerator (100). The heat-generating injection molded product manufactured through the process of FIG. 5 can be included as a component of the refrigerator, but this is exemplary and can be included in various electronic devices or home appliances that require heat generation in addition to the refrigerator.

[0178] FIG. 6 is an experimental example in which the rate of change in resistance according to the difference in base resin in a heating resin composition according to one embodiment was measured.

[0179] FIG. 7 is an image showing the change in the arrangement of carbon fillers before and after voltage application in a heat-generating resin composition according to one embodiment, where the base resin is PA (Polyamide).

[0180] FIG. 8 is an image showing the change in the arrangement of carbon fillers before and after voltage application when the base resin in a heat-generating resin composition according to one embodiment is ABS (Acrylonitrile Butadiene Styrene).

[0181] All features, components, and / or arrangement relationships between components illustrated in FIGS. 6 through 8 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 through 5 and FIGS. 9 through 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 6 through 8.

[0182] As shown in FIG. 6, differences in the rate of change of resistance over the period of use may occur depending on the type of base resin. FIG. 6(a) shows the rate of change of resistance of a heating injection molded product manufactured using PP as the base resin, FIG. 6(b) shows the rate of change of resistance of a heating injection molded product manufactured using PA as the base resin, and FIG. 6(c) shows the rate of change of resistance of a heating injection molded product manufactured using ABS as the base resin.

[0183] Figures 6 (a), (b), and (c) show the rate of change in resistance during the process of applying a voltage of 6V for 10 minutes and then cooling for 10 minutes, repeated 200 times in a chamber (e.g., minus 25 degrees Celsius) that simulates the environment inside a refrigerator (e.g., refrigerator (100) of Figure 1).

[0184] In the case of a heating injection molded product with PP as the base resin, the electrical resistance decreased by approximately 6.25% during 200 repetitions of voltage application and cooling. In the case of a heating injection molded product with PA as the base resin, the electrical resistance decreased by approximately 8.92% during 200 repetitions of voltage application and cooling. The magnitude of the voltage applied to the heating injection molded product is constant, but if the electrical resistance decreases over time, the power consumption of the refrigerator (100) may increase or damage may occur to the heating injection molded product.

[0185] On the other hand, in the case of a heat-generating injection molded product using ABS as the base resin, the electrical resistance decreased by approximately 0.04% during 200 cycles of voltage application and cooling. Experiments confirmed that the rate of change in electrical resistance was significantly lower than when PP or PA was used as the base resin. Through these experiments, the heat-generating resin composition according to one embodiment of the present disclosure used ABS resin as the base resin.

[0186] According to one embodiment, a heat-generating resin composition (or heat-generating injection molded product) based on ABS as a base resin may have a resistance reduction rate of 1% or less when voltage application and voltage non-application are repeated 200 times or more at predetermined time intervals.

[0187] Referring to Fig. 7, in the case of a heating injection molded product with PA as the base resin, it can be seen that before voltage is applied, the carbon fillers are arranged in a single direction (or parallel). That is, within the heating injection molded product with PA as the base resin, the carbon fillers can be arranged regularly. However, after voltage is applied, it can be seen that the arrangement of the carbon fillers changes irregularly. As this arrangement of carbon fillers continuously changes with repeated voltage application, it can cause a change in electrical resistance.

[0188] Referring to Fig. 8, in the case of a heating injection molded product with ABS as the base resin, it can be seen that the carbon fillers included in the heating resin composition (or heating injection molded product) are arranged irregularly without directionality before voltage is applied. Likewise, the carbon fillers are arranged irregularly even after voltage is applied. Since there is no significant difference in the directionality of the carbon fillers before and after voltage application, the heating injection molded product with ABS as the base resin can have high durability even when voltage is continuously applied.

[0189] FIG. 9 is a perspective view of the input section in an ice-making assembly of a refrigerator according to one embodiment.

[0190] FIG. 10 is a perspective view illustrating a case where some components (e.g., a first fixed frame) of an ice-making assembly of a refrigerator according to one embodiment are composed of a heat-generating resin composition.

[0191] FIG. 11 is a perspective view illustrating a case in which the input part and some components of an ice-making assembly of a refrigerator according to one embodiment are integrally formed and composed of a heat-generating resin composition.

[0192] All features, components, and / or arrangement relationships between components illustrated in FIGS. 9 through 11 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 through 8 and FIGS. 12 through 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 5.

[0193] FIGS. 9 to 11 are drawings for illustrating examples of injection-molded parts using a heat-generating resin composition among the components of an ice-making assembly (200). The injection-molded parts using a heat-generating resin composition in the present disclosure are not limited to those shown in FIGS. 9 to 11.

[0194] Referring to FIGS. 9, 10 and 11, an ice-making assembly according to one embodiment (e.g., the ice-making assembly (200) of FIG. 2) may include an input section (230) and a first fixed frame (290).

[0195] Referring to FIG. 9, according to one embodiment, the input portion (230) can be injection formed using a heat-generating resin composition. Here, the heat-generating resin composition can be manufactured using ABS resin as the base resin.

[0196] According to one embodiment, the input section (230) may be configured to guide water delivered from a water supply member (e.g., water supply member (150) of FIG. 2) into the interior of the ice-making assembly (200). In the case of the input section (230), water remaining on the surface may freeze when exposed to the temperature environment of the refrigerator room of a refrigerator (e.g., refrigerator (100) of FIG. 1). When the input section (230) is injection molded using a heat-generating resin composition, voltage may be applied to generate heat, thereby controlling the water on the surface of the input section (230) so that it does not freeze.

[0197] According to one embodiment, the input portion (230) may comprise 17 to 40 weight% of carbon filler and 60 to 83 weight% of ABS (Acrylonitrile Butadiene Styrene) resin. The carbon filler may comprise at least one of carbon fiber, carbon nanotube, carbon black, and graphene. The composition contained in the heat-generating resin composition may comprise, with respect to 100 weight% of carbon filler, 85 to 97 weight% of carbon filler, 1 to 5 weight% of carbon black, 1 to 5 weight% of carbon nanotube, and 1 to 5 weight% of graphene.

[0198] According to one embodiment, the input section (230) may include an input section body (231) and a pair of electrode sections (232, 233). The pair of electrode sections (232, 233) may extend from the input section body (231). The pair of electrode sections (232, 233) may extend from the edge portion of the input section body (231), but are not limited thereto. The input section (230) may generate heat when voltage is applied through the pair of electrode sections (232, 233).

[0199] Referring to FIG. 10, a first fixed frame (290) according to one embodiment can be injection formed using a heat-generating resin composition. Here, the heat-generating resin composition can be manufactured using ABS resin as the base resin.

[0200] According to one embodiment, the first fixed frame (290) may be heated by applying voltage when separating ice formed in the first tray (e.g., the first tray (270) of FIG. 4) and the second tray (e.g., the second tray (370) of FIG. 4) from the first tray (270) and the second tray (370). As the temperature of the first fixed frame (290) increases, the ice can be easily separated from the first tray (270) and the second tray (370).

[0201] According to one embodiment, the first fixed frame (290) may comprise 17 to 40 weight% of carbon filler and 60 to 83 weight% of ABS (Acrylonitrile Butadiene Styrene) resin. The carbon filler may comprise at least one of carbon fiber, carbon nanotube, carbon black, and graphene. The composition contained in the heat-generating resin composition may comprise, with respect to 100 weight% of carbon filler, 85 to 97 weight% of carbon filler, 1 to 5 weight% of carbon black, 1 to 5 weight% of carbon nanotube, and 1 to 5 weight% of graphene.

[0202] According to one embodiment, the first fixed frame (290) may include a frame body (291) and a pair of electrode parts (292, 293). The pair of electrode parts (292, 293) may extend from the frame body (291). The pair of electrode parts (292, 293) may extend from the edge portion of the frame body (291), but are not limited thereto. The first fixed frame (290) may generate heat when voltage is applied through the pair of electrode parts (292, 293).

[0203] Although the first fixed frame (290) is described as an example in FIG. 10, it is not limited thereto, and the second fixed frame (390) can also be injection molded using a heat-generating resin composition.

[0204] Referring to FIG. 11, according to one embodiment, a first component, which is either an input section (230) or an ice-making assembly (200), may be formed integrally. The integrally formed input section (230) and the first component may be composed of a heat-generating resin composition. In FIG. 11, the first component is illustrated as an example of a first fixed frame (290), but the first component is not limited thereto and may be a component that can be formed integrally in contact with the input section (230). For convenience of explanation, the first component is described below using the first fixed frame (290) as an example.

[0205] According to one embodiment, the integrally formed input part (230) and the first fixed frame (290) can be injection formed using a heat-generating resin composition. Here, the heat-generating resin composition can be manufactured using ABS resin as the base resin.

[0206] According to one embodiment, the input portion (230) may include a first electrode portion (1110). The first electrode portion (1110) may extend from the input portion body (231). The first electrode portion (1110) may be positioned at the edge of the input portion body (231).

[0207] According to one embodiment, the first fixed frame (290) may include a second electrode portion (1120). The second electrode portion (1120) may extend from the frame body (291). The second electrode portion (1120) may be positioned at the edge of the frame body (291).

[0208] When the heating injection molded product is formed as a single unit as shown in FIG. 11, the number of electrode parts for applying power can be reduced, thereby lowering the difficulty of the manufacturing and assembly process.

[0209] According to one embodiment, the 'heating resin composition' mentioned in FIGS. 9 to 11 may be substantially the same as the heating resin composition described in FIGS. 5 to 8. The composition of the 'heating resin composition' in FIGS. 9 to 11 may be substantially the same as the composition of the heating resin composition described in FIGS. 5 to 8.

[0210] FIG. 12 is a plan view of a first tray in an ice-making assembly of a refrigerator according to one embodiment.

[0211] All features, components, and / or arrangement relationships between components illustrated in FIG. 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 11 and FIG. 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 12.

[0212] Referring to FIG. 12, a first case (240) according to one embodiment may be injection-molded using a heat-generating resin composition. Here, the heat-generating resin composition may be manufactured using ABS resin as a base resin. The first case (240) may be configured to generate heat when power is applied to heat the buffer cells (275, 375).

[0213] According to one embodiment, the first case (240) can raise the temperature around the ice during the ice-forming process to suppress the generation of bubbles in the ice formed in the first tray (e.g., the first tray (270) of FIG. 4) and the second tray (e.g., the second tray (370) of FIG. 4). By heating the first case (240), dissolved gases remaining in the water can be moved to the buffer cell (275, 375) and removed. As the dissolved gases in the ice-making cell (272, 372) are moved to the buffer cell (275, 375) and heated, the ice formed in the ice-making cell (272, 372) can be formed as transparent ice with the turbidity removed.

[0214] According to one embodiment, the first case (240) may comprise 17 to 40 weight% of carbon filler and 60 to 83 weight% of ABS (Acrylonitrile Butadiene Styrene) resin. The carbon filler may comprise at least one of carbon fiber, carbon nanotube, carbon black, and graphene. The composition contained in the heat-generating resin composition may comprise, with respect to 100 weight% of carbon filler, 85 to 97 weight% of carbon filler, 1 to 5 weight% of carbon black, 1 to 5 weight% of carbon nanotube, and 1 to 5 weight% of graphene.

[0215] According to one embodiment, the first case (240) may include a case body (241) and a pair of electrode parts (242, 243). The pair of electrode parts (242, 243) may extend from the case body (241). The pair of electrode parts (242, 243) may extend from the edge portion of the case body (241), but are not limited thereto. The first case (240) may generate heat when voltage is applied through the pair of electrode parts (242, 243).

[0216] Although the first case (240) in FIG. 10 is described as an example, it is not limited thereto, and the second case (340) can also be injection molded using a heat-generating resin composition.

[0217] According to one embodiment, the 'heating resin composition' mentioned in FIG. 12 may be substantially the same as the heating resin composition described in FIG. 5 to 8. The composition of the 'heating resin composition' of FIG. 12 may be substantially the same as the composition of the heating resin composition described in FIG. 5 to 8.

[0218] FIG. 13 is an exploded perspective view of a rotating bar of a refrigerator according to one embodiment.

[0219] All features, components, and / or arrangement relationships between components illustrated in FIG. 13 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 13.

[0220] Referring to FIG. 13, a refrigerator (e.g., the refrigerator (100) of FIG. 1) may include a rotating bar (1200) (e.g., the rotating bar (1316) of FIG. 1). The refrigerator (100) may include a pair of first doors (e.g., the first door (131) of FIG. 1). The rotating bar (1200) may be rotatably coupled to one of the first doors (131). The rotating bar (1200) may be positioned between the pair of first doors (131) to prevent cold air leakage. When the pair of first doors (131) close the storage compartment (e.g., the storage compartment (120) of FIG. 1), cold air may leak out through a gap formed between the pair of first doors (131). The rotating bar (1200) may be provided to block this gap.

[0221] According to one embodiment, the rotating bar (1200) comprises a case (1210) that forms an exterior and has an internal receiving space (1210a) and has one side open, an insulating member (1230) that is received in the receiving space (1210a) of the case (1210), a rotating bar cover (1250) that is coupled to the open side of the case (1210), a metal plate (1270) that is coupled to the outside of the rotating bar cover (1250), and a heating member disposed in the space between the rotating bar cover (1250) and the metal plate (1270).

[0222] According to one embodiment, a guide projection (1210b) is provided on the upper part of the case (1210) to guide the rotation bar (1200) to rotate.

[0223] According to one embodiment, a passage (1240) may be provided on the upper part of the case (1210) so that the guide projection (1210b) can protrude outward from the case (1210), and the passage (1240) may be formed as a hole having the same shape as the guide projection (1210b).

[0224] According to one embodiment, an inclined surface (1210d) is provided on one side of the guide projection (1210b), and a spring (S) having elastic force is provided on the lower side of the guide projection (1210b).

[0225] According to one embodiment, the upper part of the spring (S) is coupled to a guide projection (1210b), and the lower part of the spring (S) is coupled to a coupling projection so that the guide projection (1210b) can move up and down in the passage (1240) by the elastic force of the spring (S).

[0226] According to one embodiment, the rotating bar (1200) is rotatably coupled to the first door (131) by a hinge bracket (not shown), and a plurality of coupling parts (1210c) to which the hinge bracket is rotatably coupled may be formed in the case (1210).

[0227] According to one embodiment, the insulating member (1230) is intended to insulate a storage room (e.g., the storage room (120) of FIG. 1) and may be formed of a lightweight EPS (Expanded PolyStyrene) material with excellent insulating performance.

[0228] According to one embodiment, the insulating member (1230) is formed to have a shape that can be inserted into the receiving space (1210a) of the case (1210) and then inserted into the receiving space (1210a) of the case (1210).

[0229] According to one embodiment, the rotating bar cover (1250) covers an open side of the case (1210) and can be coupled to the open side of the case (1210) after the insulating member (1230) is inserted into the receiving space (1210a) of the case (1210).

[0230] According to one embodiment, a metal plate (1270) formed of a metal material may be attached to the outer side of the rotating bar cover (1250) so as to be in close contact with the gasket by the magnetic force of a magnet (not shown) included in the gasket and to provide rigidity to the rotating bar (1200).

[0231] According to one embodiment, the rotating bar cover (1250) may include an injection-molded product composed of a heating resin composition. Here, the heating resin composition may be the resin composition described in FIGS. 5 to 8. According to one embodiment, the heating resin composition may include 17 to 40 weight% of carbon filler and 60 to 83 weight% of ABS (Acrylonitrile Butadiene Styrene) resin. The carbon filler may include at least one of carbon fiber, carbon nanotube, carbon black, and graphene. The composition contained in the heating resin composition may include, with respect to 100 weight% of carbon filler, 85 to 97 weight% of carbon filler, 1 to 5 weight% of carbon black, 1 to 5 weight% of carbon nanotube, and 1 to 5 weight% of graphene.

[0232] According to one embodiment, the rotating bar cover (1250) may be composed of a resin composition capable of generating heat. The rotating bar cover (1250) may be injection formed using a resin composition that generates heat when voltage is applied and has a very low reduction rate of electrical resistance even with repeated use, as described in FIGS. 5 to 8.

[0233] According to one embodiment, the rotating bar cover (1250) may include a first rotating bar electrode part (1251) and a second rotating bar electrode part (1252). The rotating bar cover (1250) may generate heat by receiving voltage from the first rotating bar electrode part (1251) and the second rotating bar electrode part (1252).

[0234] According to one embodiment, the rotating bar (1200) is a part that comes into direct contact with the cold air inside the storage room (120), and condensation may occur on the surface of the rotating bar (1200) due to the temperature difference between the storage room (120) and the outside of the refrigerator (100). To prevent or reduce the condensation phenomenon, a separate heating device is generally provided in the rotating bar (1200). Since the heating device must be assembled directly by a worker during the assembly process, defects may occur during the assembly process. The rotating bar (1200) according to one embodiment of the present disclosure may omit the heating device by manufacturing the injection molded part itself using a resin composition capable of generating heat and being continuously usable. As a result, the manufacturing cost is reduced, and the defect rate caused by the worker's skill level can also be reduced.

[0235] With the above configuration, when a pair of first doors (131) are closed, the rotating bar (1200) is in close contact with the gasket of the first door (131) to seal the gap between the pair of first doors (131), while minimizing the penetration of heat generated from the rotating bar cover (1250) of the rotating bar (1200) into the storage room (120).

[0236] Therefore, as the thermal insulation performance of the rotating bar (1200) is improved, heat loss from the heat generated in the rotating bar cover (1250) is minimized, so energy can be saved to prevent or reduce deposition on the rotating bar (1200).

[0237] According to one embodiment, a resin composition configured to generate heat by electrical resistance when voltage is applied may include 17 to 40 weight% of carbon filler and 60 to 83 weight% of ABS (Acrylonitrile Butadiene Styrene) resin.

[0238] According to one embodiment, the carbon filler may include at least one of carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), or graphene.

[0239] According to one embodiment, the carbon fiber may be 85% to 97% by weight with respect to 100% by weight of the carbon filler.

[0240] According to one embodiment, the carbon black may be 1% to 5% by weight with respect to 100% by weight of the carbon filler.

[0241] According to one embodiment, the carbon nanotubes may be 1% to 5% by weight with respect to 100% by weight of the carbon filler.

[0242] According to one embodiment, the graphene may be 1% to 5% by weight with respect to 100% by weight of the carbon filler.

[0243] According to one embodiment, the resin composition may have a resistance reduction rate of 1% or less when voltage application and voltage non-application are repeated 200 times or more at predetermined time intervals.

[0244] According to one embodiment, the carbon filler may be arranged irregularly without directionality.

[0245] A refrigerator (100) according to one embodiment may include a main body (110) including a storage room (120), an ice-making assembly (200) disposed inside the storage room (120), and a water supply member (150) configured to supply water from an external water source to the ice-making assembly (200). At least some components of the ice-making assembly (200) may be composed of a heat-generating resin composition that generates heat by supplying electricity. The heat-generating resin composition may include 17 to 40 weight% of a carbon filler and 60 to 83 weight% of an ABS (Acrylonitrile Butadiene Styrene) resin.

[0246] According to one embodiment, at least some of the parts of the ice-making assembly (200) that come into direct contact with water or ice may be composed of the heat-generating resin composition.

[0247] According to one embodiment, the ice-making assembly (200) may include a first case (240) and a second case (340) arranged to face each other, a first tray (270) received in the first case (240) and forming a first portion of ice, and a second tray (370) received in the second case (340) and forming a second portion of ice. At least one of the first case (240), the second case (340), the first tray (270), and the second tray (370) may be composed of the heating resin composition.

[0248] According to one embodiment, at least one of the first case (240), the second case (340), the first tray (270), and the second tray (370) composed of the heating resin composition may further include a pair of electrode portions for receiving power.

[0249] According to one embodiment, the ice-making assembly (200) may further include a first electrode portion extending from the input portion (230) and a second electrode portion extending from the first portion.

[0250] According to one embodiment, the refrigerator (100) may further include a pair of first doors (131) rotatably connected to the main body to open and close the storage compartment (120), and a rotating bar (1200) rotatably coupled to one of the pair of first doors (131) and positioned between the pair of first doors (131) to prevent or reduce cold air leakage from the storage compartment (120). A portion of the rotating bar (1200) may be composed of the heating resin composition.

[0251] According to one embodiment, the carbon filler may include at least one of carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), or graphene.

[0252] According to one embodiment, the carbon fiber may be 85% to 97% by weight with respect to 100% by weight of the carbon filler.

[0253] According to one embodiment, the carbon black may be 1% to 5% by weight with respect to 100% by weight of the carbon filler. The carbon nanotube may be 1% to 5% by weight with respect to 100% by weight of the carbon filler. The graphene may be 1% to 5% by weight with respect to 100% by weight of the carbon filler.

[0254] According to one embodiment, the carbon filler may be arranged irregularly without directionality.

[0255] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit this disclosure. For example, a component expressed in the singular should be understood as a concept including a plural component unless the context clearly implies only the singular. Each of the phrases used in this disclosure, such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C,” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. It should be understood that the term “and / or” used in this disclosure encompasses any possible combination of one or more of the listed items. Terms such as “comprising,” “having,” and “consisting of” used in this disclosure are intended merely to specify the existence of the features, components, parts, or combinations thereof described in this disclosure, and the use of such terms is not intended to exclude the existence or addition of one or more other features, components, parts, or combinations thereof. Expressions such as “first,” “second,” used in this disclosure may modify various components regardless of order and / or importance, and are used only to distinguish one component from another and do not limit said components.

[0256] The expression “configured to” as used in this disclosure may be appropriately substituted depending on the context, for example, with “suitable for,” “capable of,” “designed to,” “modified to,” “made to,” or “capable of.” The term “configured to” may not necessarily mean only that which is “specially designed” in hardware. Instead, in some situations, the expression “device configured to” may mean that the device is “capable of” together with other devices or components. For example, the phrase “device configured (1 or set) to perform A, B, and C” may mean a device dedicated to performing the said operation, or a general-purpose device capable of performing various operations including said operation.

[0257] Meanwhile, terms such as “upper side,” “lower side,” and “front-rear direction” used in this disclosure are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0258] Although the foregoing description in this disclosure has focused on specific embodiments, this disclosure is not limited to such specific embodiments and should be understood to encompass all various modifications, equivalents, and / or substitutions of various embodiments.

Claims

1. In a resin composition, 17 to 40 weight percent of carbon filler; and Includes the remainder of ABS (Acrylonitrile Butadiene Styrene) resin, and In response to the application of voltage to the resin composition, heat is generated by the electrical resistance of the resin composition. Resin composition.

2. In Paragraph 1, The above carbon filler is, Comprising carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), graphene, or a combination thereof, Resin composition.

3. In Paragraph 2, The above carbon fiber is, 85% to 97% by weight of the total weight of the carbon filler, Resin composition.

4. In Paragraph 2 or 3, The above carbon black is, 1% to 5% by weight relative to the total weight of the carbon filler, Resin composition.

5. In any one of paragraphs 2 through 4, The carbon nanotubes mentioned above are, 1% to 5% by weight relative to the total weight of the carbon filler, Resin composition.

6. In any one of paragraphs 2 through 5, The graphene mentioned above is, 1% to 5% by weight relative to the total weight of the carbon filler, Resin composition.

7. In any one of paragraphs 1 through 6, The above resin composition is, A resistance reduction rate of 1% or less when voltage is repeatedly applied to and withdrawn from the resin composition during corresponding time intervals for 200 or more times, Resin composition.

8. Regarding refrigerators, A main body (110) including a storage room (120); An ice-making assembly (200) placed inside the storage room (120); and It includes a water supply member (150) configured to supply water to be made into ice from an external water supply source to the ice-making assembly (200), and At least some of the above ice-making assembly (200) comprises a resin composition, and The above resin composition is, 17 to 40 weight% of carbon filler; and The remaining ABS (Acrylonitrile Butadiene Styrene) is included, and In response to the application of voltage to the resin composition, heat is generated by the electrical resistance of the resin composition. refrigerator.

9. In Paragraph 8, One or more components of the ice-making assembly configured to come into direct contact with water or ice during operation of the ice-making assembly (200) include the resin composition. refrigerator.

10. In Paragraph 8, The above ice-making assembly (200) is, A first case (240) comprising a first tray configured to form a first portion of ice made by the above ice-making assembly; and It includes a second case (340) comprising a second tray configured to face the first case and form a second portion of ice made by the ice-making assembly, and At least one of the first case (240), the second case (340), the first tray (270), and the second tray (370) comprises the resin composition, At least one of the first case (240), the second case (340), the first tray (270), and the second tray (370) further comprises a pair of electrode portions configured to receive power to apply voltage to the resin composition. refrigerator.

11. In Paragraph 8, The above ice-making assembly (200) is, Cover housing (220); and It includes an input part (230) configured to guide water supplied from the above water supply member (150) into the inside of the cover housing (220), and The above input part (230) is composed of the above heating resin composition, refrigerator.

12. In Paragraph 11, The first part, which is one of the above input part (230) and the above ice-making assembly (200), is formed integrally, and The input part (230) and the first part formed integrally each include the resin composition, and The above input part (230) includes a first electrode part, and The above-mentioned first component includes a second electrode portion, and The first electrode portion and the second electrode portion are configured to receive power to apply voltage to the resin composition, refrigerator.

13. In Paragraph 8, A pair of first doors (131) rotatably connected to the main body to open and close the storage room (120); and It further includes a rotating bar (1200) positioned between the pair of first doors (131) which is rotatably coupled to one of the pair of first doors (131) and configured to prevent cold air leakage of the storage room (120), and A portion of the above rotating bar (1200) comprises the above resin composition, refrigerator.

14. In any one of paragraphs 8 through 13, The above carbon filler is, It includes carbon fiber (CF), carbon nanotube (CNT), carbon black (CB), graphene, or a combination thereof, and The above carbon fiber is, 85% to 97% by weight of the total weight of the carbon filler, refrigerator.

15. In Paragraph 13 or 14, The above carbon black is, The above carbon filler is 1% to 5% by weight with respect to the total weight, and The carbon nanotubes mentioned above are, The above carbon filler is 1% to 5% by weight with respect to the total weight, and The graphene mentioned above is, 1% to 5% by weight relative to the total weight of the carbon filler, refrigerator.

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