Tray for ice maker

Abstract

The invention discloses a tray for an ice maker. The tray for an ice maker according to the present invention comprises: a tray body formed from a conductive composite material comprising a conductive material and a base resin, the conductive material forming an electrical network and being capable of separating ice cubes for making ice by means of electrical impedance heat generation; and power supply terminals which receive power supplied by an external power supply and supply power to the tray body, at least two rows of ice cube trays are arranged on the tray body, and the plurality of power supply terminals are arranged in a manner of replacing positive and negative polarities from one side end face to the other side end face with respect to the left-right direction of the tray body. According to the present invention, the base resin and the conductive material (carbon-based material) are effectively mixed, so that the carbon-based material forms an efficiently dispersed state in the base resin, thereby maximizing the heat dissipation performance of the tray body and improving the injection molding performance.

Description

Technical Field

[0001] The present invention relates to an ice maker tray which is formed in a shape that can easily separate ice cubes by generating heat by itself when power is supplied from the outside. Background Art

[0002] Generally speaking, an icemaker is a device that artificially produces a large amount of ice cubes at home or in a business place.

[0003] In conventional ice making machines, the tray for producing ice cubes is formed of plastic material or aluminum material, and the method of separating the ice cubes is different depending on the material of the tray.

[0004] If the tray is made of plastic, the ice cubes are separated from the tray by twisting the tray, but this method has the disadvantage of poor durability and is limited in mass production of ice cubes.

[0005] When the tray is made of aluminum, a heater is provided at the bottom of the tray, and the ice is slightly melted by the heat provided by the heater to separate the ice. However, if the tray is made of aluminum, an anti-corrosion film is formed on the surface using anodizing technology to prevent surface corrosion, which makes the manufacturing process of the tray complicated and requires an additional heating element, resulting in a high cost.

[0006] In order to solve the above problems, the present applicant has developed an ice maker using a composite material which is easy to manufacture and can save manufacturing costs as disclosed in Korean Patent Gazette No. 10-2302921.

[0007] However, the technology disclosed in the above-mentioned patent publication has the problem that it is difficult to form a state where the conductive material is uniformly dispersed in the base resin (non-conductive resin), and therefore, there is still a problem to be solved in maximizing the heat dissipation performance of the tray. Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] The present invention is proposed to solve the above-mentioned previous problems, and its purpose is to provide a tray for an ice maker in which a base resin and a conductive material (carbon-based material) are well mixed to form a state in which the carbon-based material is effectively dispersed in the base resin, and the base resin adopts a polyamide series resin, thereby maximizing the heat dissipation performance and rigidity of the tray.

[0010] Technical solutions to the problem

[0011] According to one embodiment of the present invention, there is provided a tray for an ice maker, comprising: a tray body, which is provided with an ice-making space, at least a portion of which is made of a conductive composite material containing a conductive material and a base resin by injection molding, and when an external power source is applied, the conductive material forms an electrical network and generates heat through resistance, so that ice cubes formed by ice making can be separated; and a power terminal, which is inserted into the interior of the tray body, receives an external power source and supplies power to the tray body, wherein the tray body is provided with at least two rows of ice-making grids based on the left-right direction, and the multiple rows of ice-making grids arranged in the front-to-back direction are arranged at intervals from each other, and the power terminals are respectively inserted into one side end face of the tray body based on the left-right direction, between at least two rows of ice-making grids, and the other side end face of the tray body based on the left-right direction, and the polarities of the multiple power terminals are alternately changed to + and - poles between the one side end face of the tray body based on the left-right direction to the other side end face.

[0012] The conductive material includes: a carbon material dispersed in a base resin to form the electrical network, including at least one of carbon nanotubes, graphene, carbon fiber, and graphite filler; and a metal powder distributed between the carbon materials to enhance the electrical network connection between the carbon materials and improve the thermal conductivity of the conductive composite material, thereby transferring the resistive heat generated by the carbon material to the surface of the tray body.

[0013] The carbon-based materials include carbon nanotubes, graphene, carbon fibers and graphite fillers.

[0014] The content of each component in the conductive composite material is:

[0015] 10 to 17 wt% of carbon nanotubes, 1 to 1.7 wt% of graphene, 2 to 5 wt% of carbon fibers, 10 to 50 wt% of graphite fillers, and 12 to 22 wt% of metal powder.

[0016] The base resin is PA6 or PA66, and the content of PA6 or PA66 in the conductive composite material is 20 to 60 weight %;

[0017] The base resin is formed by further including a conductive resin including polypyrrole (PPy) in a non-conductive resin PA6 or PA66, and the content of the conductive resin in the base resin is 0 to 10 w % or less.

[0018] The tray body is integrally formed with the power terminal through an insert injection molding process, and one end of the power terminal is exposed to the outside.

[0019] Effects of the Invention

[0020] According to the ice maker tray of the present invention, the carbon material in the conductive material includes carbon nanotubes, graphene, carbon fiber and graphite filler, which can fully mix the base resin and the conductive carbon material to achieve an efficient dispersion state of the carbon material in the base resin, thereby maximizing the heat dissipation performance of the tray body and improving the injection molding properties.

[0021] In addition, by using PA6 or PA66 as the base resin, the heat dissipation performance and structural rigidity of the tray body can be further enhanced.

[0022] Furthermore, by alternately inserting a plurality of power terminals with + and - polarities between one end face and the other end face of the tray body in the left-right direction, heat can be quickly transferred to a plurality of ice cube trays and evenly distributed heat conduction can be achieved, thereby ensuring that a large amount of ice cubes can be easily separated from the tray body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view showing a tray for an ice maker according to an embodiment of the present invention;

[0024] Figure 2 It is a front cross-sectional view showing various modified examples of the tray for an ice maker according to an embodiment of the present invention;

[0025] Figure 3 1 is a diagram showing an operating state of a tray for an ice maker according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in many different forms. This embodiment is provided only to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art of the present invention. The same symbols in the accompanying drawings refer to the same elements.

[0027] According to a preferred embodiment of the present invention, the ice maker tray is injection molded from a conductive composite material containing a conductive material, and a power terminal is integrally embedded during the injection molding process. When an external power source supplies power to the power terminal, the conductive material forms an electrical network and generates heat, so there is no need to install an additional heater in the tray, making the structure simple, easy to manufacture, and reducing costs, and enabling convenient separation of ice cubes.

[0028] The present invention will be described in detail below with reference to examples.

[0029] like Figure 1As shown, the tray 10 for ice making machine according to the embodiment of the present invention (hereinafter referred to as "tray") is an ice making space for accommodating water to be cooled by a cooling device (not shown) to form ice cubes. For example, it extends in the left-right (or front-back) direction to form a long strip structure and is divided into a plurality of inwardly concave ice making grids 110 to generate a plurality of ice cubes.

[0030] The tray 10 according to the embodiment of the present invention comprises a tray body 100 and a power terminal 200. The material constituting the tray body 100 is first described below, and the specific shape, structure, and heat generation for separating ice cubes of the tray body 100 will be described in detail later.

[0031] The tray body 100 is provided with an ice-making space, at least a portion of which is injection-molded by a conductive composite material including a conductive material and a base resin. When external power is supplied, the conductive material forms an electrical network and generates heat due to resistance, thereby achieving separation of the ice cubes. In addition, the tray body 100 is connected to a rotating discharge device (not shown), which rotates the tray body 100 to cause the ice cubes melted to a predetermined degree by the heat (heat dissipation) of the tray body 100 to fall downward and separate.

[0032] In addition, the power terminal 200 is inserted into the tray body 100 for receiving an external power source and supplying power to the tray body 100 . The power terminal 200 is in a long strip structure, and 2 to 4 power terminals can be inserted into the tray body 100 at intervals.

[0033] In an embodiment of the present invention, the tray body 100 is integrally formed with the power terminal 200 through an embedded injection molding process, so that one end of the power terminal 200 is exposed to the outside. Through this one-piece injection molding method, the power terminal 200 can be fixed to the tray body 100 without an additional fixing assembly process, thereby improving production efficiency. The end of the power terminal 200 exposed to the outside can be connected to a power supply device (not shown). In addition, the power terminal 200 can also be designed during injection molding so that except for one end, its central area is also exposed to the outside.

[0034] In the embodiment of the present invention, the conductive composite material constituting the tray body 100 includes a conductive material, a base resin, a stabilizer, and an adhesive (other additives, such as wax, etc.).

[0035] The conductive material includes carbon material and metal powder.

[0036] The carbon material is dispersed in the base resin to form an electrical network, and includes at least one of carbon nanotubes (CNT), graphene, carbon fiber, and graphite filler.

[0037] Preferably, the carbon-based material should include carbon nanotubes, graphene, carbon fibers and graphite fillers at the same time. The following description will be based on the case where the carbon-based material includes all of the above components.

[0038] In particular, the graphite filler can fully mix the base resin and the carbon material described later, ensuring that the carbon material is in an efficient dispersion state in the base resin, thereby further maximizing the heat dissipation performance of the tray body 100 .

[0039] In addition, the graphite filler also has an anti-oxidation property and can enhance the sealing performance of the tray body 100 .

[0040] In an embodiment of the present invention, the length of the carbon material in the conductive composite material is 1 to 100 micrometers (μm), and the content of the carbon material is formed in the following suitable ratio in order to form a stable and efficient electrical network.

[0041] Specifically, preferably, in the conductive composite material, the content of carbon nanotubes is preferably 10 to 17w%, the content of graphene is 1 to 1.7w%, the content of carbon fibers is 2 to 5w%, and the content of graphite fillers is 10 to 50w%.

[0042] Among them, if the carbon nanotube content is lower than 10w%, the conductivity of the conductive composite material is insufficient, resulting in reduced heat generation of the tray body 100, making it difficult to quickly separate ice cubes, thereby affecting the functional practicality of the product; if it exceeds 17w%, although the conductivity is improved, the heat generation will exceed the range required for ice separation, and the injection molding property will also be deteriorated.

[0043] In addition, if the graphene content is less than 1w%, the conductivity of the conductive composite material will decrease due to uneven dispersion; if it exceeds 1.7w%, although the conductivity is improved, the product price will increase and the cost performance will decrease.

[0044] Meanwhile, if the carbon fiber content is less than 2w%, not only the electrical network strength is weakened, but also defects may occur due to uneven conductivity; if it exceeds 5w%, the injection moldability is deteriorated.

[0045] In addition, if the graphite filler content is lower than 10w%, it is difficult to achieve sufficient mixing and efficient dispersion of the carbon material in the base resin, which ultimately results in the inability to maximize the heat generation (heat dissipation) performance of the tray body 100; if it exceeds 50w%, the injection moldability of the tray body 100 is significantly reduced.

[0046] In addition, metal powder filled between carbon materials can not only strengthen the electrical network formed by the carbon materials, but also improve the thermal conductivity of the conductive composite material, thereby transferring the resistance heat generated by the carbon materials to the surface of the tray body 100 .

[0047] It should be added that if the metal powder is not included, the thermal conductivity of the conductive composite material will be reduced to a level close to that of the base resin (non-conductive resin). Therefore, due to the extremely low thermal conductivity of the base resin (non-conductive resin), the resistance heat generated by the carbon-based material cannot be efficiently transferred to the surface of the tray body 100, making it difficult to effectively separate the ice cubes from the tray body.

[0048] In the conductive composite material, the diameter of the metal powder is preferably 10nm to 100nm, and the content of the metal powder should be more than 12w% in order to increase the electrical network between the carbon materials and improve the thermal conductivity of the conductive composite material; at the same time, in order to reduce the specific gravity of the conductive composite material, its content should be less than 22 weight percent w%. In the embodiment of the present invention, aluminum powder is used as an example of the application of metal powder for explanation.

[0049] In addition, the base resin is a main base material constituting the tray body 100, and a non-conductive resin PA6 or PA66 polyamide is used. Of course, the base resin may also include PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer) and the like in addition to PA6 or PA66, but in order to improve the thermal conductivity (i.e., heat dissipation characteristics) and rigidity of the tray body 100, it is preferably composed of only PA6 or PA66.

[0050] In addition, polyamide resin is relatively cheap compared to PP, PE, and ABS, thus helping to improve the economic efficiency of the product. In the embodiments of the present invention, the base resin is described based on polyamide using non-conductive resin PA6 or PA66.

[0051] It should be added that when PA6 or PA66 is used as the base resin, although the injection molding performance may be inferior to that of PP, PE, and ABS, it can significantly enhance the heat dissipation characteristics and rigidity of the tray body 100, thereby more efficiently and stably performing the core functions of generating and separating ice cubes.

[0052] In an embodiment of the present invention, the content of the base resin, ie, PA6 or PA66, in the conductive composite material is preferably 20 to 60w%.

[0053] If the PA6 or PA66 content is lower than 20w%, the proportion of carbonaceous substances (carbon materials) in the pallet body 100 material will increase relatively, resulting in deterioration of injection molding performance; if it exceeds 60w%, the heating performance of the pallet body will decrease, and the higher cost of PA66 will lead to an increase in product price.

[0054] In other embodiments of the present invention, the base resin may be composed of a non-conductive resin of PA6 or PA66 and an additional conductive resin including PPy (polypyrrole), wherein the content of the conductive resin in the base resin should be controlled to be below 0 to 10w%. If both the non-conductive resin of PA6 or PA66 and the conductive resin of PPy are included, the electrical properties (electrical conductivity, thermal conductivity) of the conductive composite material can be further optimized.

[0055] In addition, the content of the stabilizer in the conductive composite material is 0.1 to 0.6 w%, and the content of the binder and the wax is 0.4 to 2.1 w%.

[0056] like Figure 1 As shown, the power terminal 200 is inserted into the tray body 100 for receiving an external power source and supplying power to the tray body 100 , especially to the conductive material constituting the tray body, and is disposed in the tray body 100 in plural form.

[0057] Specifically, if Figure 2 As shown in (a), taking the case where the tray body 100 is provided with two rows of ice cube trays 110 as an example, 2 to 4 power terminals 200 can be inserted. These power terminals 200 are not combined with the tray body separately, but are integrally formed by insert injection molding during the tray body injection molding.

[0058] The related drawings show that the ice trays 110 are arranged in two rows, with a positive power terminal 210 inserted between the two rows of ice trays, and negative power terminals 220 inserted at intervals on the left and right sides thereof. This will be used as an example for explanation below.

[0059] In this embodiment, a plurality of power terminals 200 are inserted into the tray body 100 in a strip shape as conductors along the length direction of the tray body 100, but the present invention is not limited thereto, and the length and insertion position of the positive power terminal 210 and the negative power terminal 220 can be flexibly adjusted. It is necessary to ensure that one end of the positive power terminal 210 and the negative power terminal 220 is exposed outside the tray body 100 so as to be conveniently connected to the power supply device (not shown).

[0060] The positive power terminal 210 and the negative power terminal 220 are made of at least one of aluminum wire, copper alloy wire, copper wire, and conductive composite material wire having a certain conductivity. The conductive composite material wire may include carbon wire.

[0061] When making ice cubes, the user pours water into the tray body 100, and the cooling device (not shown) of the ice maker generates ice cubes by cooling. When the ice cubes need to be separated, the power supply device (not shown) supplies power to the power terminal 200. At this time, the positive power terminal 210 and the negative power terminal 220 are energized to generate a potential difference, and the inside of the tray body 100 generates heat due to the resistance.

[0062] As a result, the tray body 100 heats up, specifically the tray surface in contact with the ice cubes heats up, and the ice cubes are easily separated from the tray after the surface melts slightly. Figure 3 As shown, rotating the tray body can cause the ice cubes to fall downward and separate.

[0063] The following describes a method for manufacturing the tray 10 according to an embodiment of the present invention.

[0064] First, carbon materials (carbon nanotubes, graphene, carbon fibers, graphite fillers), metal powder (aluminum powder), PA6 (or PA66), stabilizers and adhesives are mixed in a preset ratio.

[0065] The carbon nanotube content accounts for 10 to 17w% of the total amount of the conductive composite material, the graphene accounts for 1 to 1.7w%, the carbon fiber accounts for 2 to 5w%, and the graphite filler accounts for 10 to 50w%.

[0066] The content of carbon nanotubes, graphene, carbon fibers, and graphite fillers is a parameter that affects the conductivity, i.e., resistivity, of the conductive composite material. If the content of any of the carbon nanotubes, graphene, carbon fibers, and graphite fillers is lower than the above numerical range, the electrical network of the carbon material cannot be effectively formed, resulting in a decrease in the conductivity of the tray body 100.

[0067] As mentioned above, if the conductivity of the tray body 100 is too low, the current input by the power terminal 200 cannot be effectively conducted to the carbon material, resulting in the inability to generate resistance heat.

[0068] If the content of any one of carbon nanotubes, graphene, carbon fiber, and graphite filler exceeds the above range, the electrical conductivity will no longer be improved. Therefore, from the perspective of economy, it is preferred to maintain each component within the above appropriate numerical range.

[0069] In particular, when the graphite filler content is lower than 10w%, it is difficult for the carbon material to be well mixed in the base resin and to be efficiently dispersed, and it is difficult to achieve the optimal state, which affects the maximization of the heat generation performance of the tray body; when it exceeds 50w%, there is another defect that the injection moldability of the tray body 100 is deteriorated.

[0070] Therefore, in order to ensure that the conductivity of the conductive composite material is within an appropriate range in the present invention, preferably, the content of carbon nanotubes, graphene, carbon fiber, and graphite filler needs to be maintained within the above-mentioned appropriate range.

[0071] In addition, the content of metal powder (aluminum powder) is set to 12 to 22w% of the total amount of the conductive composite material. The content of metal powder is a parameter that directly affects the electrical conductivity and thermal conductivity of the material. If the content of metal powder is less than 12w%, the metal powder cannot effectively enhance the electrical network in the carbon material, and cannot effectively play the role of heat conduction to transfer the resistance heat generated by the carbon material to the surface of the tray body 100, resulting in the tray body 100 not being able to heat up to the extent of melting ice cubes.

[0072] Also, if the content of the metal powder exceeds 22w%, there is a defect in that the specific gravity of the conductive composite material increases.

[0073] In the embodiment of the present invention, metal powder (aluminum powder) is added in addition to carbon materials (carbon nanotubes, graphene, carbon fibers, graphite fillers), which can reduce the manufacturing cost of the tray body 100 and further improve its electrical conductivity and thermal conductivity compared to using only carbon materials.

[0074] And, the content of PA6 or PA66 is 20 to 60w%, the stabilizer is 0.1 to 0.6w%, and the binder is 0.4 to 2.1w%.

[0075] The conductive composite material mixed in the optimal ratio as described above is injected at high temperature and high pressure into the mold cavity for molding the tray body 100, thereby injection molding the tray body 100. At this time, as an example, a plurality of power terminals 200 are pre-placed at specific positions of the lower mold of the injection mold, and are integrally molded by insert injection molding. After the conductive composite material is solidified in the injection mold, the tray body 100 with the power terminals integrally inserted is separated and taken out from the injection mold.

[0076] That is, the present invention can form the integrated structure of the power terminal 200 and the tray body 100 by one injection molding, which significantly reduces the manufacturing man-hours and costs.

[0077] The test results of the conductive composite material manufactured by this method are as follows:

[0078] The specific gravity (according to the test result of ASTM D792) of the conductive composite material including the conductive material (carbon material and metal powder) and the base resin (PA6 or PA66) is 1.0 to 1.7. And the resistivity of the conductive composite material is 1 to 10 Ω·mm 2 The carbon material and the metal powder are mixed at an optimal ratio, so that the conductive composite material has an optimal resistivity, and the tray body 100 manufactured by injection molding the conductive composite material has appropriate electrical conductivity and thermal conductivity.

[0079] Furthermore, the thermal conductivity of the conductive composite material is 20 to 120 W / m·K. The thermal conductivity can be adjusted according to the content of the metal powder. In this embodiment, the content of the metal powder is set to a range of 12 to 22 w%, so that the conductive composite material has the thermal conductivity within the above range.

[0080] The present invention mixes carbon materials with metal powders, thereby further improving the thermal conductivity of the conductive composite material and effectively transferring the resistance heat generated by the carbon materials to the surface of the tray body 100), thereby facilitating the separation of ice cubes from the tray body 100).

[0081] Furthermore, the tensile strength of the conductive composite material (according to the test results of ASTM D638) is 180 to 200 kgf / cm 2 , tensile elongation (according to the test results of ASTMD638) is 22 to 27%, and flexural modulus (according to the test results of ASTMD790) is 1,200 to 1,300 kgf / cm 2 , flexural strength (according to the test results of ASTMD790) is 200 to 220kgf / cm 2 The above test results confirm that the tray of the embodiment of the present invention, which is injection molded using the conductive composite material, has excellent tensile strength and bending strength.

[0082] The tray body 100 and the power terminal 200 are further described below.

[0083] like Figures 1 to 3 As shown, as an example, the tray body 100 is provided with two rows of ice cube trays 110, each of which is formed into a corresponding shape capable of generating hexagonal or octagonal columnar ice cubes.

[0084] Therefore, the inner side and the bottom surface of the ice tray 110 are both flat. In addition, the outer side of the ice tray 110 exposed to the outside, that is, the two side surfaces of the tray body 100, are also flat.

[0085] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the tray body 100 is provided with at least two rows of ice cube trays 110 along the left-right direction, and a plurality of rows of ice cube trays 110 are arranged at intervals from each other in the front-back direction.

[0086] And, if Figure 2As shown, power terminals are respectively inserted near one side end surface of the tray body 100 based on the left-right direction, between at least two rows of ice cube trays 110, and near the other side end surface of the tray body 100 based on the left-right direction.

[0087] The polarities of the power terminals 200 are alternately distributed with + / - polarities from one end surface to the other end surface based on the left-right direction of the tray body 100, thereby ensuring that heat is quickly and evenly transferred to the ice cube trays 110, making it easier to separate the ice cubes from the tray body 100.

[0088] As an example, Figure 2 (a) shows that a plurality of ice trays 110 are formed in two rows, a positive power terminal 210 is inserted between the two rows of ice trays, and negative power terminals 220 are inserted on the left and right sides thereof, but the present invention is not limited thereto, and the number of rows of ice trays can be expanded to 1 row, 3 rows, 4 rows or more.

[0089] In this embodiment, the plurality of power terminals 200 are wires, which are inserted into a longitudinal strip along the tray body 100, but are not limited thereto, and the length and insertion position of the positive power terminal 210 and the negative power terminal 220 can be adjusted. However, when inserted, one end of the positive power terminal 210 and the negative power terminal 220 is exposed to the outside of the tray body 100, so that it is easy to be powered by a power supply device (not shown).

[0090] Moreover, without limitation thereto, the number of power terminals 200 to be inserted can be adjusted according to the number of rows of the plurality of ice cube trays 110 and the shape of the tray body 100, for example, two to four can be selected. The basis for selecting the number of power terminals 200 to be inserted as described above is based on ensuring uniform thermal conductivity (heat generation) to the entire surface of the tray body 100 in order to shorten the heating time of the separated ice cubes.

[0091] The above preferred embodiments are used to illustrate the principles of the present invention, but the protection scope of the present invention is not limited to the structures and functions illustrated in the figures. Those skilled in the art may make various modifications and variations to the present invention without departing from the spirit of the claims.

[0092] Industrial Applicability

[0093] The present invention fully mixes the base resin with the conductive material (carbon material) to form a state in which the carbon material is efficiently dispersed in the base resin, and uses a polyamide series resin as the base resin, thereby showing industrial application feasibility in maximizing the heat dissipation performance and rigidity of the tray.

Claims

1. A tray for an ice maker, characterized in that: include: a tray body, which is provided with an ice-making space, at least a portion of which is made of a conductive composite material comprising a conductive material and a base resin by injection molding, and when an external power source is applied, the conductive material forms an electrical network and generates heat through resistance, so that ice cubes formed by ice making can be separated; and A power terminal is inserted into the tray body, receives external power and supplies power to the tray body, The tray body is provided with at least two rows of ice cubes based on the left-right direction, and the multiple rows of ice cubes arranged in the front-back direction are arranged at intervals from each other. Furthermore, power terminals are inserted into one end surface of the tray body in the left-right direction, between at least two rows of ice cube trays, and the other end surface in the left-right direction. Furthermore, the polarities of the plurality of power terminals are alternately changed to + and - poles between one end surface and the other end surface based on the left-right direction of the tray body.

2. The ice maker tray according to claim 1, characterized in that: The conductive material comprises: A carbon material dispersed in the base resin to form the electrical network, comprising at least one of carbon nanotubes, graphene, carbon fibers, and graphite fillers; and The metal powder is distributed among the carbon materials, strengthens the electrical network connection between the carbon materials and improves the thermal conductivity of the conductive composite material, and transfers the resistance heat generated by the carbon materials to the surface of the tray body.

3. The ice maker tray according to claim 2, characterized in that: The carbon materials include carbon nanotubes, graphene, carbon fibers and graphite fillers.

4. The ice maker tray according to claim 2, characterized in that: The contents of the components in the conductive composite material are: 10 to 17 weight % of carbon nanotubes, 1 to 1.7 weight % of graphene, 2 to 5 weight % of carbon fibers, 10 to 50 weight % of graphite fillers, and 12 to 22 weight % of metal powder.

5. The ice maker tray according to claim 1, characterized in that: The base resin is PA6 or PA66, Furthermore, the content of the PA6 or PA66 in the conductive composite material is 20 to 60 weight %; The base resin is formed by further including a conductive resin containing polypyrrole in a non-conductive resin PA6 or PA66. Furthermore, the content of the conductive resin in the base resin is 0 to 10 w % or less.

6. The ice maker tray according to claim 1, characterized in that: The tray body is integrally formed with the power terminal through an insert injection molding process, and one end of the power terminal is exposed to the outside.

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