Refrigerator

Abstract

The present invention relates to an ice maker and / or a refrigerator having the ice maker. In an aspect of the present invention, the refrigerator comprises: a storage chamber storing food; a door opening / closing the storage chamber; an ice-making chamber provided on the door or in the storage chamber; a cooler for supplying cold air to the storage chamber; cells which are provided in the ice-making chamber and are spaces where the phase of a material changes from liquid to solid phase; a first tray providing a first wall forming at least part of the cells; and a second tray providing a second wall forming another part of the cells. The degree of adhesion degree between the material which is phase-changed into the solid state and the first tray may be less than the degree of adhesion between the material that is phase-changed into the solid phase and the second tray.

Description

refrigerator

[0001] The present specification relates to an ice maker and / or a refrigerator equipped with an ice maker.

[0002] In general, a refrigerator is a home appliance that can store food at a low temperature in an internal storage space that is sealed by a door. By using cold to cool the inside of the storage space, the stored food can be kept in a refrigerated or frozen state.

[0003] Refrigerators typically come equipped with an ice maker to produce ice. This ice maker draws water from a water source or water tank into a tray, cools the water, and creates ice. Furthermore, the ice maker can remove the ice from the tray using a heating or twisting method. This type of ice maker, which automatically supplies water and removes ice, is designed to open upward to scoop up the formed ice.

[0004] Ice produced by an ice maker with this type of structure has at least one flat surface, such as a crescent or cubic shape. Meanwhile, spherical ice can be more convenient to use and provide a unique user experience. Furthermore, by minimizing the contact area between ice cubes during storage, clumping of ice cubes can be minimized. Furthermore, recent efforts have been made to produce transparent ice.

[0005] An embodiment of the present invention aims to provide an ice maker and / or a refrigerator equipped with an ice maker, which includes a tray forming an opening smaller than the diameter of ice and discharges ice by utilizing deformation of the tray.

[0006] An embodiment of the present invention aims to provide an ice maker and / or a refrigerator equipped with an ice maker, which can easily implement cells of a desired shape, including a tray having a first cell wall forming at least a portion of a cell and an additional tray having a second cell wall forming another portion of the cell and having a smaller size than the first cell wall.

[0007] An embodiment of the present invention aims to provide an ice maker and / or a refrigerator equipped with an ice maker in which the shape, material or thickness of a tray is improved so that the internal deformation of the tray in the radial direction of the cell is reduced during the deformation process of the tray.

[0008] An embodiment of the present invention aims to provide an ice maker and / or a refrigerator equipped with an ice maker in which the shape, material or thickness of a tray is improved so that the internal deformation of the tray increases in the direction of ice separation during the deformation process of the tray.

[0009] An ice maker according to an embodiment of the present invention may include a first tray forming at least a portion of a cell and a second tray forming another portion of the cell.

[0010] The first tray may include a first wall and a second wall.

[0011] From one perspective, the first wall may include a portion having a smaller deformation resistance than the second wall.

[0012] The first tray may include a guide for supplying a material to the cell, and the guide may include a third wall connected to the first wall.

[0013] The first wall of the first tray may include a portion having a smaller deformation in the first direction than the second wall of the first tray.

[0014] The above-mentioned internal deformation indicates the degree of resistance to deformation due to external force including gravity, and may be a value determined by the material, shape, thickness, etc. of the first tray.

[0015] For example, the above-mentioned strain can be understood as a factor representing stiffness, elastic modulus, hardness or flexibility.

[0016] The above first direction may be the radial direction of the cell.

[0017] The first wall of the first tray may include a portion having a smaller internal deformation in the second direction than the second wall of the first tray.

[0018] The second direction may be a direction in which a material located in the cell is discharged from the internal space of the first tray to the external space of the first tray through the opening of the first tray.

[0019] For example, the second direction may be the direction in which ice movement occurs (ice movement direction).

[0020] The above second direction may be a direction perpendicular to the above first direction.

[0021] The first wall of the first tray may include a portion in which the degree of deformation in the first direction is smaller than the degree of deformation in the second direction.

[0022] In the first wall of the first tray, the internal deformation in the first direction can vary along the second direction, and at this time, the rate of change of the internal deformation in the first direction can have a first value.

[0023] In the first wall of the first tray, the internal deformation in the second direction can vary along the first direction, and at this time, the rate of change of the internal deformation in the second direction can have a second value.

[0024] The above first value may be greater than the above second value.

[0025] From another perspective, the first tray may include portions having different thicknesses (in terms of thickness of the first tray).

[0026] The first tray may include a first region having a first thickness and a second region having a second thickness that is greater than the first thickness.

[0027] In the first tray, the proportion occupied by the first area among the total area of ​​the first area and the second area may be formed to be greater than the proportion occupied by the second area.

[0028] In the first tray, the ratio of the first area to the total area of ​​the first area and the second area may increase as it gets closer to the opening in the second direction.

[0029] For example, the first region of the first wall may have a shape of a triangle, a diamond, an arc, or an inverted Y.

[0030] The second region may have a circumferential length in the first portion of the first wall that is smaller than a circumferential length in the second portion of the first wall that is further from the first portion from the opening.

[0031] For example, the second region may have a triangular, diamond-shaped or inverted Y-shaped shape.

[0032] The second region may include a first rib extending in the first direction and a second rib extending in the second direction.

[0033] The above first rib may be a first portion of a second part of the first tray.

[0034] The above second rib may be a reinforcing rib.

[0035] The above first and second regions can be molded together.

[0036] For example, the first and second regions can be formed together by a method such as sheet metal or injection molding.

[0037] After the first and second regions are each pre-formed, the first region and the second region can be combined.

[0038] After the first wall is pre-formed, a portion of the first wall may be additionally joined to a portion of the first tray, so that the first and second regions of the first tray may be formed separately.

[0039] For example, additional raised ribs can be added to increase the thickness, such as by adding an attachment.

[0040] After the first wall is pre-formed, a portion of the first tray may be removed so that the first and second regions of the first tray may be formed separately.

[0041] For example, a concave rib can be formed by cutting or melting to reduce thickness.

[0042] After the first wall is pre-formed, a force may be applied to a portion of the first tray so that the first and second regions of the first tray may be formed separately.

[0043] For example, a negative rib can be formed by thinning the thickness of the pressurized material.

[0044] The first region of the first wall may be provided spaced apart from a portion of the wall of the first tray where the circumference of the cell is the largest.

[0045] The first region of the first wall may extend in the second direction to the opening.

[0046] From another perspective, the first wall of the first tray may include a first region including a portion extending in a first direction while forming the first wall, and a second region including a first portion connected to the first region and extending in a second direction different from the first direction (a reinforcing rib that is also applicable when the thickness is the same).

[0047] The above first wall may include a strain-reinforcing rib.

[0048] The internal deformation of the first region may be smaller than that of the second region.

[0049] The ratio of the first area to the total area of ​​the first area and the second area in the first wall of the first tray may be smaller than that of the second wall of the first tray.

[0050] The second region of the first tray may include a second portion extending from the first portion in a direction different from the second direction.

[0051] The direction in which the first part extends includes the first direction, the direction in which the second part extends includes the second direction, and the length in which the first part extends in the first direction may be greater than the length in which the second part extends in the second direction.

[0052] The ratio of the first area to the total area of ​​the first area and the second area in the first wall of the first tray may decrease as it gets closer to the opening in the second direction.

[0053] The first and second regions of the first wall can be formed together.

[0054] For example, the first and second regions can be formed together by a method such as sheet metal or injection molding.

[0055] After the first and second regions of the first wall are each pre-formed, the first region and the second region can be combined.

[0056] After the first wall is pre-formed, a portion of the first wall may be additionally joined to a portion of the first tray, so that the first and second regions of the first tray may be formed separately.

[0057] For example, additional raised ribs can be added to increase the thickness, such as by adding an attachment.

[0058] After the first wall is pre-formed, a portion of the first tray may be removed so that the first and second regions of the first tray may be formed separately.

[0059] For example, a concave rib can be formed by cutting or melting to make it thinner.

[0060] After the first wall is pre-formed, a force may be applied to a portion of the first tray so that the first and second regions of the first tray may be formed separately.

[0061] For example, a negative rib can be formed by thinning the thickness of the pressurized material.

[0062] The first region of the first wall may be provided spaced apart from a portion of the wall of the first tray where the circumference of the cell is the largest.

[0063] The first region of the first wall may extend in the second direction to the opening.

[0064] From another perspective, the first wall of the first tray may include a first region including a portion extending in a first direction while forming the first wall, and a second region including a first portion connected to the first region and extending in a second direction different from the first direction (a deformation reduction rib applicable even when the thickness is the same).

[0065] The internal deformation of the first region may be greater than that of the second region.

[0066] In the first wall of the first tray, the proportion of the first area among the total area of ​​the first area and the second area may be greater than that of the second wall of the first tray.

[0067] The second region of the first tray may include a second portion extending from the first portion in a direction different from the second direction.

[0068] The direction in which the first part extends includes the first direction, the direction in which the second part extends includes the second direction, and the length in which the first part extends in the first direction can be formed to be smaller than the length in which the second part extends in the second direction.

[0069] In the first wall of the first tray, the ratio of the first area to the total area of ​​the first area and the second area may increase as it gets closer to the opening in the second direction.

[0070] The first and second regions of the first wall can be formed together.

[0071] For example, the first and second regions can be formed together by a method such as sheet metal or injection molding.

[0072] After the first and second regions of the first wall are each pre-formed, the first region and the second region can be combined.

[0073] After the first wall is pre-formed, a portion of the first wall may be additionally joined to a portion of the first tray, so that the first and second regions of the first tray may be formed separately.

[0074] For example, additional raised ribs can be added to increase the thickness, such as by adding an attachment.

[0075] After the first wall is pre-formed, a portion of the first tray may be removed so that the first and second regions of the first tray may be formed separately.

[0076] For example, a concave rib can be formed by cutting or melting to reduce thickness.

[0077] After the first wall is pre-formed, a force may be applied to a portion of the first tray so that the first and second regions of the first tray may be formed separately.

[0078] For example, a negative rib can be formed by thinning the thickness of the pressurized material.

[0079] The first region of the first wall may be provided spaced apart from a portion of the wall of the first tray where the circumference of the cell is the largest.

[0080] The first region of the first wall may extend in the second direction to the opening.

[0081] From another perspective, the first wall of the first tray may include a first region having a first internal strain and a second region having a second internal strain that is greater than the first internal strain (from a material perspective of the first tray).

[0082] The material of the first region and the material of the second region may be different from each other.

[0083] In the first wall of the first tray, the proportion of the first area among the total area of ​​the first area and the second area may be greater than that of the second wall of the first tray.

[0084] In the first wall of the first tray, the ratio of the first area to the total area of ​​the first area and the second area may increase as it gets closer to the opening in the second direction.

[0085] The first and second regions of the first wall can be formed together.

[0086] For example, the first and second regions can be formed together by a method such as sheet metal or injection molding.

[0087] After the first and second regions of the first wall are each pre-formed, the first region and the second region can be combined.

[0088] After the first wall is pre-formed, a portion of the first wall may be additionally joined to a portion of the first tray, so that the first and second regions of the first tray may be formed separately.

[0089] For example, additional raised ribs can be added to increase the thickness, such as by adding an attachment.

[0090] After the first wall is pre-formed, a portion of the first tray may be removed so that the first and second regions of the first tray may be formed separately.

[0091] For example, a concave rib can be formed by cutting or melting to reduce thickness.

[0092] After the first wall is pre-formed, a force may be applied to a portion of the first tray so that the first and second regions of the first tray may be formed separately.

[0093] For example, a negative rib can be formed by thinning the thickness of the pressurized material.

[0094] The first region of the first wall may be provided spaced apart from a portion of the wall of the first tray where the circumference of the cell is the largest.

[0095] The first region of the first wall may extend in the second direction to the opening.

[0096] A refrigerator according to an embodiment of the present invention may include a storage room in which food is stored, a door for opening and closing the storage room, an ice making room provided in the door or the storage room, a cooler for supplying cold to the storage room, a cell provided in the ice making room as a space in which a substance changes from a liquid to a solid state, and a tray wall provided with a first wall forming at least a portion of the cell and a second wall forming another portion of the cell.

[0097] The first wall may include a portion having a degree of deformation smaller than the degree of deformation of the second wall.

[0098] The first wall may include a portion in which the internal deformation in the radial direction of the cell or the internal deformation in the moving direction is smaller than that of the second wall.

[0099] The first wall may include a portion in which the internal deformation in the radial direction of the cell is smaller than the internal deformation in the moving direction.

[0100] The first wall may have an internal deformation in the radial direction of the cell that varies along the moving direction of the cell, and an internal deformation in the moving direction of the cell that varies along the radial direction of the cell.

[0101] The first rate of change in the radial deformation of the cell along the moving direction of the cell may be formed to be greater than the second rate of change in the radial deformation of the cell along the moving direction of the cell.

[0102] The first wall and the second wall constitute a first tray, the first wall is in contact with the second tray, and the second wall can be supported by a tray supporter.

[0103] The first wall may include a first region having a first thickness and a second region having a second thickness greater than the first thickness.

[0104] In the first wall, the proportion occupied by the first area among the total area of ​​the first area and the second area may be formed to be greater than the proportion occupied by the second area.

[0105] The second region is formed closer to the center of the cell among the center of the cell and the opening of the tray wall, and the opening may be a through hole through which a solid material is discharged.

[0106] The first region is formed closer to the center of the cell and the opening of the tray wall, and the opening may be a through hole through which a solid substance is discharged.

[0107] The first region may be configured to increase from the center of the cell toward the opening.

[0108] The second region may extend from the center of the cell toward the opening in the shape of a triangle, a diamond, an arc, or an inverted Y.

[0109] The second region includes a first portion and a second portion extending in a circumferential direction, and at least a portion of the first region may be located between the first portion and the second portion.

[0110] When defining a circumferential extension line (ℓ1) passing through a portion of the first wall, the extension line (ℓ1) may alternately pass through the first area and the second area.

[0111] The second region may include a first rib extending in the circumferential direction of the first wall and a second rib connected to the first rib and extending toward the opening of the tray wall.

[0112] The second region may include a rib extending in the direction of movement from the center of the cell toward the opening in the tray wall.

[0113] The above rib may include a plurality of ribs spaced apart from each other in the circumferential direction, and the second region may include an additional rib connecting the plurality of ribs and extending in the circumferential direction.

[0114] The first region and the second region may be formed integrally, or the first region and the second region may be provided separately and then combined.

[0115] The first region and the second region may be composed of different materials so that the internal deformation of the first region and the internal deformation of the second region are formed differently.

[0116] The above tray wall includes an opening through which a solid material is discharged, and the diameter of the opening can be formed to be 70% or more and less than 100% of the diameter of the cell.

[0117] The tray wall includes a pusher that presses the wall, and the hardness of the tray wall can be determined to be a value greater than the first hardness (H1) and less than the second hardness (H2) so that the insertion depth of the pusher at which the maximum ice-breaking force is generated is formed in a range of 14% to 35% of the diameter of the ice.

[0118] According to an embodiment of the present invention, a tray is provided that forms an opening smaller than the diameter of ice, and ice can be easily discharged by utilizing deformation of the tray.

[0119] According to an embodiment of the present invention, a cell of a desired shape can be easily implemented by including a tray having a first cell wall forming at least a portion of a cell and an additional tray having a second cell wall forming another portion of the cell and having a smaller size than the first cell wall.

[0120] According to an embodiment of the present invention, the shape, material or thickness of the tray can be improved so that the internal deformation of the tray in the radial direction of the cell is reduced during the deformation process of the tray, thereby improving the icing performance.

[0121] In an embodiment of the present invention, the ice-breaking performance can be improved by improving the shape, material, or thickness of the tray so that the internal deformation of the tray increases in the direction of ice-breaking during the deformation process of the tray.

[0122] FIG. 1 is a drawing illustrating a refrigerator according to an embodiment of the present invention.

[0123] Figure 2 is a perspective view showing an ice maker according to a first embodiment of the present invention.

[0124] Figure 3 is an exploded perspective view of an ice maker according to a first embodiment of the present invention.

[0125] Figure 4 is a cross-sectional view of an ice maker according to a first embodiment of the present invention.

[0126] FIG. 5 is a drawing showing a tray assembly according to a first embodiment of the present invention.

[0127] Figure 6 is a drawing showing a first tray according to a first embodiment of the present invention.

[0128] Figure 7 is a side view of the first tray.

[0129] Figure 8 is a plan view of the first tray.

[0130] Figure 9 is a bottom view of the first tray.

[0131] Figure 10 is a cross-sectional view taken along line 10-10 of Figure 6.

[0132] Figure 11 is a cross-sectional view taken along line 11-11 of Figure 6.

[0133] Figure 12 is a cross-sectional view taken along line 12-12 of Figure 6.

[0134] Figure 13 is a front view of the first tray.

[0135] Figure 14 is a cross-sectional view taken along line 14-14 of Figure 13.

[0136] Figure 15 is a cross-sectional view taken along line 15-15 of Figure 13.

[0137] Figure 16 is a cross-sectional view of the tray assembly.

[0138] Figures 17 and 18 are drawings showing the operation of an ice maker according to the first embodiment of the present invention.

[0139] Figure 19 is a graph showing the change in pulling power measured according to the pulling distance during the ice breaking process.

[0140] Fig. 20 is a drawing showing the configuration of a pusher according to the first embodiment of the present invention.

[0141] Figure 21 is a schematic diagram showing how the maximum ice breaking force point differs depending on the difference in the length of the pusher during the ice breaking process.

[0142] Figure 22 is an experimental graph showing the change in maximum ice breaking force according to the ratio of ice diameter and opening diameter of the first tray.

[0143] Figure 23 is an experimental graph showing the change in the insertion depth of the pushing bar at which the maximum icing force is generated, depending on the hardness of the first tray.

[0144] Fig. 24 is a perspective view of a first tray according to a second embodiment of the present invention.

[0145] Figure 25 is a side view of the first tray.

[0146] Figure 26 is a cross-sectional view taken along line 26-26 of Figure 24.

[0147] Figure 27 is a cross-sectional view taken along line 27-27 of Figure 24.

[0148] Figure 28 is a front view of the first tray.

[0149] Fig. 29 is a cross-sectional view taken along line 29-29 of Fig. 28.

[0150] Fig. 30 is a perspective view of a first tray according to a third embodiment of the present invention.

[0151] Figure 31 is a side view of the first tray.

[0152] Figure 32 is a plan view of the first tray.

[0153] Figure 33 is a bottom view of the first tray.

[0154] Figure 34 is a cross-sectional view taken along line 34-34 of Figure 30.

[0155] Figure 35 is a cross-sectional view taken along line 35-35 of Figure 30.

[0156] Figure 36 is a front view of the first tray.

[0157] Figure 37 is a cross-sectional view taken along line 37-37 of Figure 36.

[0158] Figure 38 is a cross-sectional view taken along line 38-38 of Figure 36.

[0159] Figure 39 is a perspective view of a first tray according to a fourth embodiment of the present invention.

[0160] Figure 40 is a side view of the first tray.

[0161] Figure 41 is a cross-sectional view taken along line 41-41 of Figure 39.

[0162] Figure 42 is a cross-sectional view taken along line 42-42 of Figure 39.

[0163] Figure 43 is a front view of the first tray.

[0164] Figure 44 is a cross-sectional view taken along line 44-44 of Figure 43.

[0165] Figure 45 is a cross-sectional view taken along line 45-45 of Figure 43.

[0166] Figure 46 is a perspective view of a first tray according to a fifth embodiment of the present invention.

[0167] Figure 47 is a side view of the first tray.

[0168] Fig. 48 is a cross-sectional view taken along line 48-48 of Fig. 46.

[0169] Figure 49 is a cross-sectional view taken along line 49-49 of Figure 46.

[0170] Figure 50 is a front view of the first tray.

[0171] Figure 51 is a cross-sectional view taken along line 51-51 of Figure 50.

[0172] Figure 52 is a cross-sectional view taken along line 52-52 of Figure 56.

[0173] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of related known structures or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0174] In addition, when describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," "supported," or "connected" to another component, it should be understood that the component may be directly "connected," "coupled," "supported," or "connected" to the other component, but another component may also be "connected," "coupled," "supported," or "connected" between each component.

[0175] Meanwhile, in describing the components of an embodiment of the present invention, the description "at least one of components A and B" can be understood to include three embodiments: (1) A alone, (2) B alone, and (3) both A and B.

[0176] Additionally, in describing components of an embodiment of the invention, the meaning of the description "at least one of components A or B" can be understood to include three embodiments meaning (1) A alone, (2) B alone, and (3) both A and B. In other words, the meaning of the description "at least one of components A or B" can be the same as the meaning of the description "at least one of components A and B."

[0177] The refrigerator according to an embodiment of the present invention may include a storage compartment in which items (e.g., food, medicine, etc.) are stored. The refrigerator may include a door for opening and closing the storage compartment. The refrigerator may store the items in a refrigerated or frozen state. The refrigerator may include an ice-making compartment in which at least a portion of an ice maker, which will be described later, is disposed. The ice-making compartment may be provided in the storage compartment and / or the door.

[0178] An ice maker according to an embodiment of the present invention may include a cell, which is a space in which the product (e.g., water) changes phase into ice. The ice maker may include a tray assembly. The tray assembly may include a tray, a tray case, or the tray and the tray case. The tray may include a wall forming at least a portion of the cell. The tray case may include a wall connected to the tray, coupled to the tray, supported by the tray, or surrounding at least a portion of the tray. The tray case may include at least one of a tray cover and a tray supporter. The tray assembly may include a first tray assembly and a second tray assembly. The first tray assembly may include a first tray, a first tray case, or the first tray and the first tray case. The first tray may include a wall forming a first portion of the cell. The first tray case may include a wall connected to the first tray, coupled to the first tray, supported by the first tray, or surrounding at least a portion of the first tray. The first tray case may include at least one of a first tray cover and a first tray supporter. The second tray assembly may include a second tray, a second tray case, or the second tray and a second tray case. The second tray may include a wall forming a second portion of the cell. The second tray case may include a wall connected to the second tray, coupled to the second tray, supported by the second tray, or surrounding at least a portion of the second tray. The second tray case may include at least one of a second tray cover and a second tray supporter. The ice maker may include a bracket.The bracket may cover at least a portion of the tray assembly or may accommodate at least a portion of the tray assembly.

[0179] The ice maker and / or the refrigerator may include a pusher. The pusher may be provided to press the ice and / or the tray assembly so as to separate the ice from the tray assembly. The pusher may include a first edge formed with a surface that presses the ice and / or the tray assembly. The pusher may include a bar extending from the first edge. The pusher may include a second edge positioned at an end of the bar.

[0180] A pressurizing portion that pressurizes the pusher may be formed on the tray assembly, and the pusher may be configured to apply pressure to one surface of the tray assembly. The pusher may be defined as a non-penetrating pusher.

[0181] A first edge of the pusher may be movable along a surface of a tray defining at least a portion of the cell at a first point outside the cell. The pusher may be defined as a movable pusher. The pusher may be connected to a drive unit, a rotational axis of the drive unit, or a drive connected to a movable tray assembly.

[0182] The above pusher can further pressurize the pressurized portion after contacting the pressurized portion at a first point outside the cell. The pusher can be coupled to a fixed end. The pusher can be defined as a fixed pusher.

[0183] The ice maker and / or the refrigerator may include a heater. The heater (e.g., a wire heater, a cord heater, a radiant heater, etc.) may supply heat to the cell and / or the storage compartment. The heater may directly supply heat by contacting the tray assembly and / or the cell. The heater may indirectly supply heat (e.g., hot or warm air) without being connected to the tray assembly and / or the cell.

[0184] The ice maker and / or the refrigerator may include a cooler (e.g., an evaporator, a refrigerant pipe, a refrigerant valve, a fan, a damper, a thermoelectric module, etc.). The cooler may directly supply cold by contacting the tray assembly and / or the cell. The cooler may indirectly supply heat (e.g., cold or cold air) without being connected to the tray assembly and / or the cell.

[0185] The ice maker and / or the refrigerator may include a temperature sensor. The temperature sensor may be provided to detect the temperature of an item (e.g., water) or ice in the cell.

[0186] The ice maker and / or the refrigerator may include a driving device. The driving device may be connected to the tray assembly and / or the pusher.

[0187] The refrigerator of the present invention may include a tray assembly forming a portion of a cell, which is a space where water changes into ice, a cooler for supplying cold to the cell, a water supply unit for supplying water to the cell, and a controller.

[0188] The controller may control the cooler to supply cold to the cell after the tray assembly is moved to the ice-making position. The controller may control the tray assembly to move forward to the ice-removing position to remove ice from the cell after ice production in the cell is completed. The controller may control the tray assembly to move in the reverse direction to the water supply position after ice production is completed and then start supplying water. The controller may control the tray assembly to move to the ice-making position after the water supply is completed.

[0189] In the present invention, a cell is defined as a space located within the storage chamber where water undergoes a phase change into ice. The circumference of the cell refers to the outer surface of the cell, regardless of the shape of the cell. In another aspect, the outer surface of the cell may refer to the inner surface of the wall forming the cell.

[0190] In the present invention, a tray may be defined as a wall that divides the cell and the interior of the storage chamber. The tray may be defined as a wall that forms at least a portion of the cell. There may be a plurality of trays. The plurality of trays may be in contact with each other.

[0191] In the present invention, the refrigerator may include at least one tray assembly in which a heater is disposed. The heater may be disposed near the tray assembly so as to heat a cell formed by the tray assembly in which the heater is disposed. The heater may include a heater (hereinafter, "transparent ice heater") that is controlled to be turned on at least in a portion of a section while the cooler supplies cold so that bubbles dissolved in water inside the cell move from a portion where ice is generated toward liquid water, thereby generating transparent ice. The heater may include a heater (hereinafter, "separating ice heater") that is controlled to be turned on at least in a portion of a section after ice-making is completed so that ice can be easily separated from the tray assembly.

[0192] In the present invention, the cell may be cooled by the cooler that cools the storage compartment. For example, the storage compartment where the cell is located may be a freezer that can be controlled to a temperature below 0 degrees Celsius, and the cell may be cooled by the cooler that cools the freezer. The cell may be located in a door that opens and closes the storage compartment.

[0193] In the present invention, the degree of deformation resistance refers to the degree to which an object resists deformation due to an external force applied to the object, and is defined as a value determined by the shape including the thickness of the object, the material of the object, etc. As an example, the external force may include the pressure applied to the tray assembly during the process in which water inside the cell solidifies and expands. As another example, the external force may include the pressure applied to the ice or a part of the tray assembly by a pusher for separating the ice and the tray assembly. As another example, when a plurality of trays are combined, the pressure applied by the combination may be included.

[0194] Meanwhile, from the perspective of the material of the object, a large degree of internal deformation of the object may mean that the object has high rigidity. The thermal conductivity may be a unique material characteristic of the object. Even when the material of the object is the same, the degree of internal deformation may vary depending on the shape of the object, etc. The degree of internal deformation may be affected by an internal deformation reinforcement portion extended in the direction in which the external force is applied. The greater the rigidity of the internal deformation reinforcement portion, the greater the degree of internal deformation. The greater the height of the extended internal deformation reinforcement portion, the greater the degree of internal deformation.

[0195] In the present invention, the degree of restoration refers to the degree to which an object deformed by an external force is restored to its shape before the external force was applied after the external force is removed, and is defined as a value determined by the shape including the thickness of the object, the material of the object, etc.

[0196] Hereinafter, a specific embodiment of the refrigerator of the present invention will be described with reference to the drawings.

[0197] FIG. 1 is a drawing illustrating a refrigerator according to an embodiment of the present invention.

[0198] Referring to FIG. 1, a refrigerator according to an embodiment of the present invention may include a cabinet (14) including a storage compartment and a door for opening and closing the storage compartment.

[0199] The storage compartment may include a refrigerator (18) and a freezer (32). The refrigerator (14) is positioned on the upper side, and the freezer (32) is positioned on the lower side, so that each storage compartment can be individually opened and closed by its own door. As another example, the freezer may be positioned on the upper side, and the refrigerator may be positioned on the lower side. Alternatively, the freezer may be positioned on one of the left and right sides, and the refrigerator may be positioned on the other side.

[0200] The above freezer (32) can be divided into first and second spaces (e.g., lower space and upper space), and the first space can be equipped with a drawer (40) that can be pulled out and in from the first space.

[0201] The above door may include a plurality of doors (10, 20, 30) that open and close the refrigerator compartment (18) and the freezer compartment (32). The plurality of doors (10, 20, 30) may include some or all of a door (10, 20) that opens and closes the storage compartment in a rotating manner and a door (30) that opens and closes the storage compartment in a sliding manner.

[0202] The above freezer (32) may be provided to be separated into two spaces, even though it can be opened and closed by a single door (30). In this embodiment, the freezer (32) may be referred to as a first storage room, and the refrigerator (18) may be referred to as a second storage room.

[0203] The above freezer (32) may be equipped with an ice maker (200) capable of producing ice. The ice maker (200) may be located, for example, in a portion of the freezer (32) (e.g., an upper space).

[0204] An ice bin (600) may be placed on one side (e.g., the lower side) of the ice maker (200) into which ice produced by the ice maker (200) is dropped and stored. A user may take the ice bin (600) out of the freezer (32) and use the ice stored in the ice bin (600). The ice bin (600) may be coupled to one side (e.g., the upper side) of a wall dividing a first space (e.g., the lower space) and a second space (e.g., the upper space) of the freezer (32).

[0205] Although not shown, the cabinet (14) is provided with a duct (not shown) for supplying cold to the ice maker (200). The duct guides the cold that has exchanged heat with the refrigerant flowing through the evaporator toward the ice maker (200). For example, the duct may be arranged at one side (e.g., the rear) of the cabinet (14) and discharge the cold toward the other side (e.g., the front) of the cabinet (14). The ice maker (200) may be located at the other side (e.g., the front) of the duct. Although not limited, the discharge port of the duct may be provided at one or more of the first side wall (e.g., the rear wall) and the second side wall (e.g., the upper wall) of the freezer (32).

[0206] Although it has been described above that the ice maker (200) is provided in the freezer (32), the space in which the ice maker (200) can be located is not limited to the freezer (32), and the ice maker (200) can be located in various spaces as long as cold can be supplied. Hereinafter, it will be described that the ice maker (200) is located in the storage room.

[0207] FIG. 2 is a perspective view showing an ice maker according to a first embodiment of the present invention, and FIG. 3 is an exploded perspective view of the ice maker according to the first embodiment of the present invention.

[0208] Referring to FIGS. 2 and 3, an ice maker (200) according to a first embodiment of the present invention may include a bracket (220) that supports a tray assembly. Each component of the ice maker (200) may be provided inside or outside the bracket (220), so that the ice maker (200) may form a single assembly.

[0209] The bracket (220) may be coupled to at least one surface of the storage compartment. The bracket (220) may include a first wall (221) having a through hole (226) formed therein. At least a portion of the first wall (221) may extend in a first direction (e.g., horizontally) and may be coupled to one surface of the storage compartment.

[0210] The above bracket (220) may include two second walls (222) extending in one direction (e.g., downward) from both sides of the first wall (221). The space between the two second walls (222) may form a space in which the tray assembly and the driving unit (510) are arranged.

[0211] One of the two second walls (222) may cover the driving unit (510). The other of the two second walls (222) may function as a barrier to prevent ice from falling into the ice bin (600) or ice stored in the ice bin (600) from falling, and may form a wall penetration hole (222a) with at least a portion thereof penetrated to prevent frost formation.

[0212] The above bracket (220) may include a third wall (223) protruding from the first wall (221). The third wall (223) may protrude from the first wall (221) in a direction toward the storage chamber.

[0213] The third wall (223) may include a first part (223a) extending in a direction corresponding to one direction of the storage room (e.g., front-back direction) and a second part (223b) extending from one end (e.g., front end) of the first part (223a) in the other direction (e.g., left-right direction).

[0214] The third wall (223) may include a hook (223c) that is coupled to one side (e.g., the upper side) of the storage room. For example, the hook (223c) may be provided on the second part (223b).

[0215] A water supply unit (240) can be coupled to the second part (223b). The water supply unit (240) includes a hook (248), and the hook (248) can be hooked to one end (e.g., the upper end) of the second part (223b).

[0216] The bracket (220) may be formed with a suction hole (224a) through which cold air from the storage chamber flows toward the tray assembly. The suction hole (224a) may be formed in a side wall of the bracket (220). For example, the suction hole (224a) may be formed in a space between the second wall (222) and the third wall (223). From another perspective, the suction hole (224a) may be formed by penetrating at least a portion of the second wall (222).

[0217] Cold can be sucked from one side of the bracket (220) to the tray assembly side through the suction hole (224a) and act as cold for ice making.

[0218] The first wall (221) may include a through hole that functions as an outlet through which cold air passing through the tray assembly is discharged. A plurality of the through holes may be formed.

[0219] The above bracket (220) may include a guide wall (225) that guides cold sucked through the suction hole (224a) toward the tray assembly. The guide wall (225) may extend from the third wall (223) toward the central portion of the bracket (220).

[0220] For example, the guide wall (225) may include a portion extending roundly from the third wall (223) toward the cell (360). The cell (360) may be positioned closer to one end (e.g., the front end) than to the other end (the rear end).

[0221] The above bracket (220) may include a blocking plate (227a) that prevents cold air sucked through the suction hole (224a) from being discharged from the bracket (220) rather than toward the tray assembly. For example, the blocking plate (227a) may extend in one direction (e.g., upward) from the first wall (221).

[0222] The above ice maker (200) may include a first tray assembly and a second tray assembly.

[0223] The first tray assembly may include a first tray (400), a first tray case, or the first tray (400) and a second tray case. For example, in the present embodiment, the first tray assembly may include a first tray (400).

[0224] The second tray assembly may include the second tray (300) and the first tray case. The second tray case may include at least one of a second tray supporter and a second tray cover.

[0225] The above bracket (220) can define at least a portion of a space that accommodates the first tray assembly and the second tray assembly.

[0226] The bracket (220) may be arranged, for example, on one side wall (e.g., the upper wall) of the freezer (32). A water supply unit (240) may be arranged on the bracket (220). The water supply unit (240) may guide water supplied from one side (e.g., the upper side) to the other side (e.g., the lower side) of the water supply unit (240). A water supply pipe (not shown) for supplying water may be arranged on one side (e.g., the upper side) of the water supply unit (240).

[0227] The above water supply unit (240) may be supported by a bracket (220). The above water supply unit (240) may include a hook (248) that is coupled to the bracket (220). For example, the hook (248) may be hooked to a second part (223b) of the bracket (220).

[0228] The ice maker (200) may include a cell (see 360 ​​in FIG. 4), which is a space where water changes into ice due to cold. The first tray (400) may form at least a portion of the cell (360). The second tray (300) may form another portion of the cell (360). The cell (360) may include a first cell formed by the first tray (400) and a second cell formed by the second tray (300).

[0229] The second tray (300) can be coupled to the bracket (220). The first tray (400) can be positioned to be relatively movable with respect to the second tray (300). The first tray (400) can move linearly or rotate.

[0230] During the ice-making process, the first tray (400) moves relative to the second tray (300), so that the second tray (300) and the first tray (400) can come into contact. When the second tray (300) and the first tray (400) come into contact, the cell (360) can be defined.

[0231] After the ice making process is completed, the first tray (400) may move relative to the second tray (300), so that the first tray (400) may be separated from the second tray (300).

[0232] In this embodiment, the second tray (300) and the first tray (400) may be arranged in one direction (e.g., up and down) while forming a cell (360). Accordingly, the second tray (300) may be referred to as an upper tray, and the first tray (400) may be referred to as a lower tray.

[0233] A plurality of cells (360) can be defined by the second tray (300) and the first tray (400). For example, the plurality of cells (360) can include three cells (360).

[0234] When water is supplied to the cell (360) and the water is cooled by cold, ice having a shape identical to or similar to that of the cell (360) can be created. For example, the cell (360) can be formed in a spherical shape or a shape similar to a sphere. Of course, the cell (360) can also be formed in a rectangular parallelepiped shape or a polygonal shape.

[0235] The second tray (300) may include a plurality of tray parts (300a, 300b, 300c). The number of the plurality of tray parts (300a, 300b, 300c) may correspond to the number of the plurality of cells (360).

[0236] Each tray part can form at least a portion of one cell. Based on the total surface area of ​​one cell (360), the surface area of ​​a portion of the cell formed by each tray part can be smaller than the surface area of ​​another portion of the cell formed by the first tray (400).

[0237] The above first tray case may include, for example, a first tray cover (480) and a first tray supporter (450). The first tray (400), the first tray supporter (450), and the first tray cover (480) may be joined by a fastening member (457).

[0238] At least a portion of the first tray cover (480) may be positioned on one side (e.g., the upper side) of the first tray (400). The first tray cover (480) may include a cover wall (481) forming an opening (482). The cover wall (481) may be positioned on one side (e.g., the upper side) of the first extension wall (420, see FIG. 6) of the first tray (400).

[0239] The first extension wall (420) may be provided with a contact protrusion (428) that comes into contact with the first tray cover (480). The contact protrusion (428) may extend in one direction (e.g., upward) from the first extension wall (420).

[0240] An insertion hole (481a) into which the contact protrusion (428) is inserted may be formed in the cover wall (481) of the first tray cover (480). The contact protrusion (428) may contact the stopper (250). In the process of the first tray (400) moving to the ice-making position, the contact protrusion (428) may be pressed by the stopper (250), thereby improving the adhesion between the first and second trays (300, 400).

[0241] The above opening (482) may be formed so that at least a portion of the first tray cover (480) passes through it so that at least a portion of the first tray (400) passes through it. The opening (482) may be formed to have a predetermined curvature corresponding to the shape of the outer surface of the cell (360).

[0242] The first tray cover (480) may include a cover fastening portion (485) that protrudes in one direction (e.g., downward) from the cover wall (481). A plurality of the cover fastening portions (485) may be provided along the perimeter of one side (e.g., the bottom side) of the cover wall (481). The cover fastening portions (485) may be coupled to at least one of the fastening portion (425, see FIG. 6) of the first tray (400) and the supporter fastening portion (456) of the first tray supporter (450).

[0243] At least a portion of the first tray supporter (450) may be positioned on one side (e.g., the lower side) of the first tray (400). The first tray supporter (450) may support the second tray (400) on one side (e.g., the lower side) of the second tray (400). At least a portion of a wall forming a first cell of the first tray (400) may be supported by the first tray supporter (450).

[0244] The first tray (400) may include a peripheral wall (430, see FIG. 6) that surrounds a portion of the second tray (300) while in contact with the second tray (300).

[0245] The above ice maker (200) may include a driving unit (510) that provides driving force. By receiving the driving force of the driving unit (510), the first tray (400) can move relative to the second tray (300).

[0246] The first tray supporter (450) may include two extension parts (455) in which through holes (455a) are formed. The two extension parts (455) may be provided on both sides of the first tray supporter (450). The ice maker (200) may include a shaft (520) that passes through the through holes (455a). The shaft (520) extends between the two extension parts (455) and may rotate by receiving power from the driving unit (510).

[0247] The first tray supporter (450) may include two first walls (451) forming two side surfaces. The two extensions (455) may be provided at one end (e.g., the rear end) of the first wall (451), respectively.

[0248] The first tray supporter (450) may include a second wall (452) connecting the other ends (e.g., front ends) of the two first walls (451). The second wall (452) may form a first surface (e.g., front surface) of the first tray supporter (450).

[0249] The first tray supporter (450) may include a third wall (453) forming a second surface (e.g., an upper surface) of the first tray supporter (450). The first extension wall (420, see FIG. 6) of the first tray (400) may be mounted on the third wall (453).

[0250] A joining portion (459) to which the first edge (422a, see FIG. 16) of the first tray (400) is joined may be formed on the third wall (453). The joining portion (459) may include a through hole through which the first edge (422a) is inserted.

[0251] An insertion portion (458a) may be formed in the third wall (453) to which the second edge (422b, see FIG. 16) of the first tray (400) is coupled. The insertion portion (458a) may include a groove recessed from the third wall (453) to allow the second edge (422b) to be inserted.

[0252] The first tray supporter (450) may include at least one of a fourth wall (454) and a fifth wall (458) extending in one direction (e.g., downward) from the third wall (453). The fourth wall (454) may be one side wall (e.g., rear wall) of the first tray supporter (450). The fifth wall (458) may be understood as an inner wall spaced apart in the other direction (e.g., forward) from the fourth wall (454).

[0253] The above insertion portion (458a) may be a space formed between the fourth wall (454) and the fifth wall (458).

[0254] The first tray supporter (450) may be formed with a receiving space (453a) that is sunken in one direction (e.g., downward) from the third wall (453). A portion of the first cell of the first tray (400) may be received in the receiving space (453a).

[0255] A transparent ice heater (490) for applying heat to the first tray (400) during the ice-making process may be placed in the above-mentioned receiving space (453a). The transparent ice heater (490) may be placed adjacent to or in contact with one side (e.g., the lower side) of the first tray (400) so as to supply heat to a portion (e.g., the lower side) of the first tray (400). The transparent ice heater (490) may be a wire-type heater.

[0256] The first tray supporter (450) may include a fourth wall (454) forming a third surface (e.g., a rear surface) of the first tray supporter (450). The outer surface of the first tray supporter (450) may be defined by the first to fourth walls (451, 452, 453, 454).

[0257] A holder (530) may be provided at both ends of the shaft (440). The holder (530) may include a first holder (531) connecting the shaft (520) and the driving unit (510). The first holder (531) may be coupled to one end of the shaft (520) and may be positioned between the extension (455) and the driving unit (510).

[0258] The first holder (531) is configured to have an open side end portion so that the shaft (520) passes through it, and the shaft (520) can be coupled to the driving unit (510) by passing through the first holder (531).

[0259] The holder (530) may include a second holder (532) coupled to the other end of the shaft (520). The second holder (532) is positioned on the outside of the extension (455), and the shaft (520) may pass through the through hole (455a) and be supported by the second holder (532).

[0260] The above driving unit (510) may include a motor and a plurality of gears.

[0261] A full ice detection lever (550) may be connected to the driving unit (510). The full ice detection lever (550) is moved by power provided from the driving unit (510), and the ice stored in the ice bin (600) may be detected during the movement of the lever (550).

[0262] The above driving unit (510) may include a cam that rotates or moves by receiving power from the motor. The ice maker (200) may include a sensor that detects the rotation or movement of the cam.

[0263] The refrigerator controller can determine the position of the first tray (400) (or first tray assembly) based on the type and pattern of the signal output from the sensor. That is, since the first tray (400) and the cam are moved by the motor, the water supply position, ice-making position, and ice-separating position of the first tray (400) can be distinguished and determined based on the detection signal of the magnet provided in the cam.

[0264] The above ice maker (200) may include a pusher (540). The pusher (540) may be placed on the bracket (220), for example.

[0265] The pusher (540) may include a coupling plate (542) coupled to the bracket (220) and at least one pushing bar (544) extending from the coupling plate (542). For example, the pusher (540) may include a number of pushing bars (544) equal to the number of cells (360), but is not limited thereto.

[0266] The pushing bar (544) can push out ice located in the cell (360). For example, the pushing bar (544) can penetrate the first tray supporter (450) and come into contact with the first tray (400) forming the cell (360), and pressurize the second tray (400) that is in contact.

[0267] The first tray (400) may be formed of a non-metallic material. For example, the first tray (400) may be formed of a flexible or malleable material that can change shape when pressed by the pusher (540). Although not limited, the first tray (400) may be formed of a silicone material, for example.

[0268] In the process of pressurizing the first tray (400) by the pusher (540), the first tray (400) may be deformed and the pressing force of the pusher (540) may be transmitted to the ice. The ice and the first tray (400) may be separated by the pressing force of the pusher (540).

[0269] When the first tray (400) is formed of a non-metallic material and a flexible or malleable material, the bonding or adhesive force between the ice and the first tray (400) can be reduced, so that the ice can be easily separated from the first tray (400).

[0270] When the first tray (400) is formed of a non-metallic material and a flexible or malleable material, after the shape of the first tray (400) is deformed by the pusher (540), when the pressing force of the pusher (540) is removed, the first tray (400) can be easily restored to its original shape.

[0271] For example, the second tray (300) may be formed of a metal material or a plastic material. In this case, the bonding or adhesive force per unit area between the second tray (300) and the ice may be relatively strong. However, since the cells formed within the second tray (300) have a small surface area (or ice contact area), ice separation can be easily achieved.

[0272] As another example, the second tray (300) may be formed of a non-metallic material. In this case, the bonding or adhesive force per unit area between the second tray (300) and the ice may be relatively weak. Accordingly, ice separation may be facilitated. Although not limited, the second tray (300) may be formed of, for example, a silicone material.

[0273] The second tray (300) and the first tray (400) may be formed of the same material. In this case, the hardness of the second tray (300) and the hardness of the first tray (400) may be different so that sealing performance is maintained at the contact area between the second tray (300) and the first tray (400).

[0274] In the present embodiment, since the first tray (400) is deformed by being pressed by the pusher (540), the hardness of the first tray (400) may be lower than the hardness of the second tray (300) so that the shape of the first tray (400) can be easily deformed.

[0275] Figure 4 is a cross-sectional view of an ice maker according to a first embodiment of the present invention.

[0276] Referring to Fig. 4, the second tray (300) according to the first embodiment of the present invention can be coupled to a bracket (220). The bracket (220) can include a coupling wall (221a) coupled to the second tray (300). The coupling wall (221a) can be formed to be stepped in one direction (e.g., downward) from the first wall (221) forming one surface (e.g., upper surface) of the bracket (220).

[0277] The second tray (300) may be fastened to the connecting wall (221a) by a predetermined fastening member. A fastening groove (325) into which the fastening member is fastened may be formed in a portion (e.g., the upper portion) of the second tray (300).

[0278] The above bracket (220) may include a support wall (229) for supporting the second tray (300). The support wall (229) may extend in one direction (e.g., downward) from the joining wall (221a) and may be configured to support the guide wall (320) of the second tray (300).

[0279] The second tray (300) includes a plurality of tray parts (300a, 300b, 300c), and the plurality of tray parts can be arranged spaced apart in one direction (e.g., left and right direction).

[0280] The second tray (300) may form a through hole (323) that allows air to escape to the outside of the cell at the ice-making position. The through hole (323) may be formed so that at least a portion of the second tray (300) passes through in one direction (e.g., in the up-down direction). The through hole (323) may be formed in a portion (e.g., the upper portion) of the second tray (300).

[0281] A water supply unit (240) may be coupled to the upper portion of the bracket (220). A storage space (241) for storing fluid may be formed inside the water supply unit (240). A first portion of the water supply unit (240) may be located on the outside of the tray assembly and supported by the bracket (220). For example, the first portion may form a portion (e.g., an upper portion) of the water supply unit (240).

[0282] The second part of the water supply unit (240) is positioned inside the tray assembly to supply fluid to the cell (360). For example, the second part may form the other part (e.g., the lower part) of the water supply unit (240). When the fluid is supplied, the tray assembly may be in the water supply position.

[0283] The above water supply unit (240) may be provided with a discharge unit (243) for discharging fluid. The discharge unit (243) may be formed at one end (e.g., the lower end) of the water supply unit (240). The discharge unit (243) may include a discharge opening for discharging fluid.

[0284] At the ice-making position of the tray assembly, the second tray (300) and the first tray (400) can contact each other to form cells (360) corresponding to the desired ice shape.

[0285] The inner surface of the cell (360) may include a first cell surface (410a) formed by the first tray (400) and a second cell surface (310a) formed by the second tray (300). The first cell surface (410a) and the second cell surface (310a) may extend in the circumferential direction to form a cell (360).

[0286] Based on the center (C1) of the cell (360), the diameter (D1) of the cell (360) may be formed to be larger than the diameter (D2) of the portion where the first cell surface (410a) and the second cell surface (310a) come into contact. The portion where the first cell surface (410a) and the second cell surface (310a) come into contact may be understood as the boundary between the second tray (300) and the first tray (400).

[0287] The above diameter (D2) can form the diameter of the opening (313) of the second tray (300). The opening (313) of the second tray (300) can form one end (e.g., the lower end) of the second tray (300). The above diameter (D2) can form the diameter of the opening (413) of the first tray (400). The opening (413) of the first tray (400) can form one end (e.g., the upper end) of the first tray (400).

[0288] From one perspective, the second tray (300) may be understood to function as a cover member covering the opening of the first tray (400).

[0289] With respect to the center (C1) of the cell (360), the circumferential length of the first cell surface (310a) may be formed to be smaller than the circumferential length of the second cell surface (410a). With respect to the center (C1) of the cell (360), the central angle formed by the first cell surface (310a) may be formed to be smaller than the central angle formed by the second cell surface (410a).

[0290] When defining the horizontal (X-axis) diameter (D1) and the vertical (Z-axis) diameter (D3) of the above cell (360), the diameters (D1) and (D3) may be formed to be the same to implement a spherical cell. As another example, the diameter (D3) may be formed to be larger than the diameter (D1) to implement an elliptical cell having a major axis in one direction (e.g., up and down). Since the cell is formed in an elliptical shape, the diameter (D1) perpendicular to the moving direction (Z-axis direction) may be formed to be smaller than the diameter (D3) corresponding to the moving direction, so that the moving torque may be reduced.

[0291] FIG. 5 is a drawing showing a tray assembly according to a first embodiment of the present invention, FIG. 6 is a drawing showing a first tray according to the first embodiment of the present invention, FIG. 7 is a side view of the first tray, FIG. 8 is a plan view of the first tray, and FIG. 9 is a bottom view of the first tray.

[0292] Referring to FIGS. 3 and 4, and FIGS. 5 to 9 together, a tray assembly according to a first embodiment of the present invention may include a first tray (400) and a second tray (300). The first tray (400) may define a first cell (410b) which is a part of a cell (360).

[0293] The second tray (300) may include a second tray wall (310) forming a portion of the cell (360). For example, the second tray wall (310) may define the second cell (310b). The inner surface of the second tray wall (310) may form a second cell surface (310a), and the second cell surface (310a) may be understood to define an outer surface of the second cell (310b).

[0294] The second tray (300) may include a plurality of tray parts (300a, 300b, 300c) each defining a second cell (310b). The plurality of second cells (310b) may be arranged in one direction (e.g., in the X-axis direction) with reference to FIG. 8.

[0295] The second tray (300) may include a second opening (313). The second opening (313) forms one end (e.g., the lower end) of the second tray (300) and may be in contact with the first tray (400).

[0296] The second tray (300) may include a guide wall (320) extending from the second tray wall (310). The guide wall (320) may, for example, extend in one direction (e.g., upward) from the first tray wall (310).

[0297] The above guide wall (320) can form a through hole (323). The through hole (323) can be formed to penetrate from the inner surface of the second tray wall (310), i.e., the second cell surface (310a), to the outer surface of the guide wall (320).

[0298] The first end of the above-mentioned through hole (323), i.e., the inlet-side end, may be connected to the second cell surface (310a). The second end of the above-mentioned through hole (323), i.e., the discharge-side end, may be connected to one end (e.g., the upper end) of the above-mentioned guide wall (320). During the ice-making process, air bubbles in the cell (360) are discharged through the through hole (323), thereby preventing an air pocket phenomenon in the cell (360).

[0299] The above guide wall (320) may include a drainage portion (324) that is connected to the through hole (323) and penetrates one side (e.g., the front) of the guide wall (320). The drainage portion (324) may direct the fluid discharged through the through hole (323) to the outside of the second tray (300) to prevent ice from forming in the through hole (323). The drainage portion (324) may include a drain hole.

[0300] The above guide wall (320) may be formed with a fastening portion (325) to which a fastening member is coupled. The fastening portion (325) may be configured as a fastening groove that is recessed from one end (e.g., the upper end) of the guide wall (320). The fastening member may be coupled to the bracket (220) and / or may be coupled to the fastening portion (325) to couple the second tray (300) to the bracket (220).

[0301] The first tray (400) may define a first cell (410b), which is another part of the cell (360). The first tray (400) may include a first tray wall (410) that forms another part of the cell (360). For example, the first tray wall (410) may define the first cell (410b). The first tray wall (410) may be referred to as a "cell wall" that forms a cell.

[0302] The inner surface of the first tray wall (410) forms a first cell surface (410a), and the first cell surface (410a) can be understood as defining an outer surface of the first cell (410b). The first tray (400) can define, for example, a plurality of first cells (410b). The plurality of first cells (410b) can be arranged in one direction (for example, in the X-axis direction) with reference to FIG. 9, for example.

[0303] In order to define the plurality of first cells (410b), a plurality of first tray walls (410) are provided, and each first tray wall (410) can be arranged in one direction (e.g., in the X-axis direction).

[0304] The first tray (400) may include a first opening (413). The first opening (413) forms one end (e.g., an upper end) of the first tray (400) and may be in contact with the second tray (300).

[0305] The first tray (400) may include a first extension wall (420) extending in a first direction (e.g., horizontally) toward the outside of the first tray wall (410). The first extension wall (420) may be mounted on the third wall (453) of the first tray supporter (450).

[0306] A plurality of first tray walls (410) defining the plurality of first cells (410b) are provided, and the first extension wall (420) may extend outward from the plurality of first tray walls (410). For example, the first extension wall (420) may include a square-shaped flat wall.

[0307] The first extension wall (420) may be formed at a location where an extension line in a first direction (e.g., horizontal direction) that bisects the height of the cell (360) in the second direction (e.g., vertical direction) passes. When defining the center (C1) of the cell (360), an extension line in the first direction (e.g., horizontal direction) that passes through the center (C1) may pass through the first extension wall (420).

[0308] The first tray wall (410) may include a first part (411) positioned on one side (e.g., the lower side) of the first extension wall (420) based on the first extension wall (420). The first part (411) may form one area (e.g., the lower area) of the cell (360).

[0309] One end (e.g., the lower end) of the first part (411) may form a recessed portion (411a). As water expands during the ice-making process, the recessed portion (411a) may be deformed (expanded) into a desired cell shape.

[0310] The above first part (411) can be accommodated in the accommodation space (453a) of the first tray supporter (450) and supported by the first tray supporter (450).

[0311] The first tray wall (410) may include a second part (412) located on the other side (e.g., upper side) of the first extension wall (420) with respect to the first extension wall (420). The second part (412) may form a part of the other area (e.g., upper area) of the cell (360).

[0312] One end (e.g., the upper end) of the second part (412) may form the first opening (413). The second part (412) may be understood as a portion that is not accommodated in the accommodation space (453a).

[0313] The above first part (411) and the above second part (412) can be formed as one piece.

[0314] The first part (411) is provided with a sensor bracket (414) for coupling a temperature sensor that detects the temperature of the cell (360). For example, the sensor bracket (414) may be arranged to connect two adjacent first parts (411) among a plurality of first parts (411).

[0315] From one perspective, the first tray wall (410) may include a plurality of walls having different degrees of internal deformation. The degree of internal deformation indicates the degree of resistance to deformation due to external forces including gravity, and may be a value determined by the material, shape, thickness, etc. of the first tray. The degree of internal deformation may be understood as a factor indicating rigidity, elastic modulus, hardness, or flexibility.

[0316] The above plurality of walls may include a first wall forming the second part (412) and a second wall forming the first part (411). Hereinafter, the first wall (412) and the second wall (411) will be described in terms of the first wall (412) and the second wall (411).

[0317] The first wall (412) may include a portion having a smaller degree of deformation than the second wall (411). The first wall (412) of the first tray (400) may include a portion having a smaller degree of deformation in a first direction than the second wall (411) of the first tray (400). For example, the portion having a smaller degree of deformation may include a first region (412a). The first direction may be a radial direction of the cell (360).

[0318] The first wall (412) of the first tray (400) may include a portion having a smaller internal deformation in the second direction than the second wall of the first tray (400). For example, the portion having a smaller internal deformation may include a first region (412a).

[0319] The second direction may be a direction in which a material located in the cell (360) is discharged from the internal space of the first tray (400) to the external space of the first tray (400) through the opening (413) of the first tray (400). For example, the second direction may be a direction in which ice separation occurs (ice separation direction). For example, the second direction may be a direction perpendicular to the first direction.

[0320] The first wall (412) of the first tray (400) may include a portion in which the degree of deformation in the first direction is smaller than the degree of deformation in the second direction. With this configuration, deformation in the first direction is relatively large and deformation in the second direction is relatively small, so that movement in the second direction can be easily achieved.

[0321] In the first wall (412) of the first tray (400), the internal deformation in the first direction can vary along the second direction, and at this time, the rate of change of the internal deformation in the first direction can have a first value.

[0322] In the first wall (412) of the first tray (400), the internal deformation in the second direction can vary along the first direction, and at this time, the rate of change of the internal deformation in the second direction can have a second value. The first value can be greater than the second value.

[0323] The plurality of walls may include a first wall (412) having a first internal strain and a second wall (411) having a second internal strain. The internal strain of at least a portion of the first wall (412) may be less than the internal strain of the second wall (411). In another aspect, the first tray (400) may include portions having different thicknesses.

[0324] The first wall (412) of the first tray (400) may include a first region (412a) having a first thickness and a second region (412b) having a second thickness greater than the first thickness. In the first wall (412) of the first tray (400), the proportion of the first region among the total area of ​​the first region and the second region may be formed to be greater than that of the second wall (411) of the first tray (400).

[0325] In the first wall (412) of the first tray (400), the proportion of the first area among the total area of ​​the first area and the second area may increase as it gets closer to the opening in the second direction. For example, the first area may have a triangular, diamond-shaped, arc-shaped, or inverted Y-shaped shape.

[0326] The circumferential length of the second region in the first part of the first wall may be smaller than the circumferential length of the second part of the first wall that is further from the first part from the opening (413). For example, the second region may have a triangular, diamond-shaped, arc-shaped, or inverted Y-shaped shape. That is, the circumferential length of the second region may become smaller as it goes toward the opening (413).

[0327] As illustrated in Fig. 10, when defining an extension line (ℓ1) passing circumferentially through the first rib (412b1) forming the second region, the circumferential length of one first rib (412b1) closer to the opening (413) based on the extension line (ℓ1) may be smaller than the circumferential length of another first rib (412b1). For example, one of the first ribs (412b) may be an upper first rib, and the other first rib (412b1) may be a lower first rib.

[0328] Based on the circumferential direction of the above extension line (ℓ1), the first region (412a) and the second region (412b) of the first wall (412) can be arranged alternately.

[0329] The second region may include a first rib (412b1) extending in the first direction and a second rib (412b2) extending in the second direction. The first rib (412b1) forms a part of the second region and may extend in the circumferential direction.

[0330] The second rib (412b2) forms a part of the second region and can extend in the second direction from a point of the first rib (412b). The second rib (436) can be called a “reinforcing rib.”

[0331] The first and second regions may be formed together. For example, the first and second regions may be formed together by a method such as sheet metal or injection molding. After the first and second regions of the first wall (412) are each formed in advance, the first region and the second region may be combined.

[0332] After the first wall (412) is pre-formed, a portion of the first wall may be additionally joined to a portion of the first tray, so that the first and second regions of the first tray may be formed separately. For example, a raised rib that increases the thickness, such as an addition, may be additionally joined.

[0333] After the first wall (412) is pre-formed, a portion of the first tray may be removed to form first and second regions of the first tray separately. For example, a concave rib may be formed by cutting or melting to reduce the thickness.

[0334] After the first wall (412) is pre-formed, force may be applied to a portion of the first tray to form first and second regions of the first tray separately. For example, a negative rib that is thinned by applying pressure may be formed.

[0335] The first region (412a) of the first wall (412) may be provided spaced apart from a portion of the wall of the first tray where the circumference of the cell is the largest. The first region (412a) of the first wall (412) may extend in the second direction to the opening (413).

[0336] Additional configurations of the first tray (400) will be described. The first tray (400) may include a third extension wall (433) that forms a flow path for a fluid supplied to the cell (360). The third extension wall (433) may be understood as a guide device that supplies a substance to the cell (360). The third extension wall (433) may extend outward from the second part (412, first wall), for example, upward.

[0337] The first tray (400) may include a peripheral wall (430) extending along the perimeter of one end (e.g., the upper end) of the first tray wall (410). For example, the peripheral wall (430) may be formed integrally with the first tray wall (410) and may extend upward from one end (e.g., the upper end) of the first tray wall (410).

[0338] As another example, the peripheral wall (430) may be formed separately from the first tray wall (410) and positioned around one end (e.g., the upper end) of the first tray wall (410). In this case, the peripheral wall (430) may contact the first tray wall (410) or be spaced apart from the first tray wall (410). In either case, the peripheral wall (430) may surround at least a portion of the second tray (300).

[0339] If the first tray (400) includes the peripheral wall (430), the first tray (400) can surround the second tray (300). The space between the peripheral wall (430) and the second tray (300) can form a fluid flow space when water is supplied from the water supply unit (240).

[0340] The space between the above-mentioned peripheral wall (430) and the second tray (300) can form a storage space for the discharged fluid when the fluid is discharged through the drainage portion (324) of the second tray (300).

[0341] The above-described peripheral wall (430) may include a second extension wall (431) extending in one direction (e.g., in an up-down direction) along the perimeter of one end (e.g., an upper end) of the second part (412). The second extension wall (431) may be arranged to surround at least a portion of the second tray (300). One end (431b) of the second extension wall (431) may be formed at a higher position than the cell (360). For example, the one end (431b) may form an “upper end.”

[0342] A portion of the inner surface of the second extension wall (431) may be in contact with the second tray (300). In detail, at least a portion of the outer surface of the first tray wall (310) may form a first contact surface (312a) that is in contact with the second extension wall (431).

[0343] The second extension wall (431) may extend in an inclined or rounded manner in a direction away from the second tray (300). The inclined or rounded portion may form a contact surface (431a) that contacts the first contact surface (312a).

[0344] The above contact surface (431a) can be extended upwardly at a set angle (θ) with respect to the X-axis direction. That is, the above contact surface (431a) can form an inclined contact surface (see Fig. 16).

[0345] The second extension wall (431) can reduce the heat transferred from the transparent ice heater (490) to the first tray (400) from being transferred to the first cell (310b) formed by the second tray (300). That is, the second extension wall (431) serves to move the heat conduction path away from the first cell (310b).

[0346] The above second extension walls (431) may be provided at one end (e.g., the upper end) of each of the plurality of first tray walls (410). The plurality of second extension walls (431) may be spaced apart from each other in one direction (e.g., the X-axis direction).

[0347] The first tray (400) may include a separation wall (432) provided between the plurality of second extension walls (431). The separation wall (432) may connect one end (e.g., the rear end) of the plurality of second extension walls (431). By the separation wall (432), the plurality of second extension walls (431) may be spaced apart from each other.

[0348] The first tray (400) may include a plurality of tray parts defining a plurality of cells. For example, the plurality of tray parts may include a first tray part (401a) defining a first cell, a second tray part (401b) defining a second cell, and a third tray part (401c) defining a third cell.

[0349] The first tray part (401a) may be a part that forms a central cell among a plurality of cells, and the second and third tray parts (401b, 401c) may be parts that form cells on both sides among a plurality of cells. The first tray part (401a) may be placed between the second and third tray parts (401b, 401c).

[0350] The first to third tray parts (401a, 401b, 401c) can be arranged to be connected or in contact with each other (see FIGS. 13 and 14).

[0351] The above-mentioned separation wall (432) may be provided in multiple numbers. For example, the above-mentioned separation wall (432) may include a first separation wall (432a) provided between the second extension wall (431) of the first tray part (401a) and the second extension wall (431) of the second tray part (401b).

[0352] The above-mentioned separation wall (432) may include a second separation wall (432b) provided between the first extension wall (431) of the second tray part (401b) and the second extension wall (431) of the third tray part (401c).

[0353] The second extension wall (431) and the third extension wall (433) may be positioned opposite each other with respect to the center of the cell. For example, the second extension wall (431) may be positioned on one side (e.g., the rear side) of the second tray (300), and the third extension wall (433) may be provided on the opposite side of the second extension wall (431).

[0354] At least a portion of the third extension wall (433) can guide the flow or form a flow path when water is supplied from the water supply unit (240) to the cell (360).

[0355] The third extension wall (433) may extend from the second tray wall (410) in a first direction (e.g., upward). The third extension wall (433) may extend from the second tray wall (410) in a second direction (e.g., forward) and may be configured to have a “ㄷ” shape by bending in a third direction (e.g., sideways).

[0356] The first tray (400) may include a plurality of cells. For example, the first tray (400) may include three cells. However, the number of cells may not be limited thereto. The first cell may be positioned between the second cell and the third cell so that the fluid discharged from the first cell flows into the second cell and the third cell.

[0357] The above extension wall (433) can be connected to a second cell wall forming the second cell and a third cell wall forming the third cell.

[0358] The second tray (300) may include a water supply guide (327) provided on at least one side of the guide surface (311). The water supply guide (327) protrudes from the first tray wall (310) of the second tray (300) and may prevent fluid from leaking out of the guide surface (311). For example, the water supply guide (327) may include a protruding rib.

[0359] The above water supply guide (327) may protrude from at least one side of the guide surface (311). The guide surface (311) may be understood as a surface defined between the water supply guides (327) on both sides of the outer surface of the first tray wall (310).

[0360] The above water supply guide (327) may extend from the guide wall (320) in a direction toward the third extension wall (433). A space in which a fluid is stored or a space in which a fluid flows may be formed between the third extension wall (433) and the water supply guide (327).

[0361] The first tray (400) may include a connecting wall (434) connecting the second extension wall (431) and the third extension wall (433). The connecting wall (434) may extend roundly or slanted in one direction (e.g., rearward) from the second extension wall (431) toward the third extension wall (433).

[0362] The above connecting wall (434) may be provided on at least one side of the first tray (400). In a broad sense, the connecting wall (434) may be understood as a part of the second extension wall (431). In this case, the second extension wall (431) may be understood as being connected to the third extension wall (433).

[0363] One end of the third extension wall (433) may be connected to the second tray part (401b), and the other end may be connected to the third tray part (401c). For example, both ends of the third extension wall (433) may be connected to the second extension wall (431) of the second tray part (401b) and the second extension wall (431) of the third tray part (401c).

[0364] The above second extension wall (431), separation wall (432), connection wall (434), and third extension wall (433) can define a space in which the second tray (300) is located. The space can form a space (channel) in which fluid flows or is stored during the water supply process.

[0365] The first tray (400) may include a reinforcing rib (412b2) to reinforce the strength of the first tray (400). The reinforcing rib (412b2) may be a part of the second region (412b). The reinforcing rib (412b2) may be provided on the second tray wall (410) or the peripheral wall (430).

[0366] The first tray (400) may be made of a flexible material. The reinforcing rib (412b2) may prevent undesirable deformation when water is supplied to the first tray (400) or when it is moved to an ice-making position (or ice-making position).

[0367] For example, the reinforcing rib (412b2) may be provided on at least one wall among the second part (412), the second extension wall (431), and the separation wall (432). The reinforcing rib (412b2) may be arranged on the surface of the at least one wall so as to extend in one direction (e.g., in the vertical direction).

[0368] The above reinforcing rib (412b2) may be provided at a relatively weak location in the first tray (400) to prevent undesirable expansion or deformation from occurring during the ice-making process. For example, at least a portion of the above reinforcing rib (412b2) may be arranged in the second tray wall (410), particularly in the second area (412b) having the second thickness (t2) among the second part (412) (see FIG. 14).

[0369] FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 6, FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 6, FIG. 12 is a cross-sectional view taken along line 12-12 of FIG. 6, FIG. 13 is a front view of the first tray, FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. 13, FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. 13, and FIG. 16 is a cross-sectional view of the tray assembly.

[0370] Referring to FIGS. 10 to 16, a first tray (400) according to an embodiment of the present invention may include a first wall (412) and a second wall (411). The first wall (412) may include a portion having a smaller deformation resistance than the second wall (411). The first wall (412) may include a first region (412a) having a first thickness (t1) and a second region (412b) having a second thickness (t2) greater than the first thickness (t1).

[0371] The second region (412b) may include a rib protruding from the first region (412a). The rib may include a first rib (412b1) extending in a circumferential direction. The rib may include a second rib (412b2) extending from the first rib (412b1) in a direction toward the opening (413).

[0372] Fig. 13 is a cross-sectional view showing a cut line passing through the third extension wall (433) without passing through the second rib (412b2), Fig. 14 is a cross-sectional view showing a cut line passing through the second rib (412b2) and the third extension wall (433), and Fig. 15 is a cross-sectional view showing a cut line passing through neither the second rib (412b2) nor the third extension wall (433).

[0373] First, referring to FIG. 13, the second wall (411) can form a second thickness (t2). The first region (412a) of the first wall (412) can form the first thickness (t1). The second extension wall (431) can form the first thickness (t1).

[0374] The thickness of the third extension wall (433) may form a third thickness (t3). The second thickness (t2) and the third thickness (t3) may be greater than the first thickness (t1). The third thickness (t3) may be equal to or slightly smaller than the second thickness (t2).

[0375] Since the first part (411) is supported by the first tray supporter (450), a desired ice shape can be realized during the process of fluid expansion during ice making. However, the second part (412, first wall) may protrude above the second tray supporter (450) and may not be directly supported by the first tray supporter (450). Therefore, it may not be easy to realize a desired ice shape during the process of fluid expansion during ice making.

[0376] To solve this, at least one of the first region (412a) and the second region (412b) can be configured so that the portion of the second part (412) adjacent to the first extension wall (420) undergoes relatively little deformation, and the portion far from the first extension wall (420) undergoes relatively much deformation.

[0377] The second region (412b) forms a portion adjacent to the first extension wall (420) and may have a relatively large first thickness (t2). The portion adjacent to the first extension wall (420) may be understood as a portion adjacent to the center (C1) of the cell (360) forming the ice diameter (D1).

[0378] The second region (412b) may be understood as a portion adjacent to an extension line passing through the center (C1) of the cell (360) in a first direction (e.g., horizontal direction). Among the second region (412b), the first rib (412b1) may be positioned adjacent to an extension line passing through the center (C1) of the cell (360) in a first direction (e.g., horizontal direction).

[0379] The first region (412a) forms a portion that is relatively far from the first extension wall (420) and may have a second thickness (t1) that is relatively thin. The portion that is relatively far from the first extension wall (420) may be understood as a portion that is far from the center (C1) of the cell (360) that forms the diameter (D1) of the ice.

[0380] The first region (412a) can be understood as a portion adjacent to the first opening (413) of the first tray (400). In this way, a portion of the second region (412b) near the center of the ice among the cells (360) can be formed to have a large degree of internal deformation or a large thickness, thereby reducing the amount of deformation during the ice separation process.

[0381] Among the cells (360), other parts of the first region (412a) far from the center of the ice can be made to have a small internal deformation or a small thickness, thereby increasing the deformation amount during the ice separation process. With this configuration, when the first opening (413) of the first tray (400) expands during the ice separation process and ice is discharged, the deformation amount in the part adjacent to the first opening (413) increases, making ice separation easier.

[0382] The first wall (412) may be configured such that the size of the first region (412a) having the first thickness (t1) increases from the first extension wall (420) toward the first opening (413). For example, the first and second portions of the second region (412b) having the second thickness (t2) may be spaced apart from each other, and the first region (412a) may be provided between the first and second portions. For example, the first and second portions may be spaced apart from each other in the circumferential direction.

[0383] The area of ​​the first region (412a) may increase as it moves toward the first opening (413). With this configuration, the expansion rate can be maintained evenly in the circumferential direction of the first wall (412) during the ice-making process.

[0384] Referring to Fig. 11, in order to reinforce the thin thickness of the first region (412a) and the second extension wall (431), the first tray (400) may include a second rib (412b2, reinforcing rib). A portion of the first wall (412) on which the second rib (412b2) is provided may have a second thickness (t2).

[0385] The second rib (412b2) may form a part of the second region (412b). The second rib (412b2) may be provided on the outer surface of at least one of the first region (412a) and the second extension wall (431).

[0386] The second ribs (412b2) are arranged in multiple numbers spaced apart from each other in the circumferential direction of the first wall (412), so that the expansion rate can be maintained evenly in the circumferential direction of the first wall (412).

[0387] The thickness (t3) of the third extension wall (433) may be formed to be greater than the thickness (t1) of at least one of the first region (412a) of the first wall (412) and the second extension wall (431) so as not to be easily deformed by the pressure of the fluid.

[0388] Referring to Fig. 16, the third extension wall (433) may be formed in steps. For example, the third extension wall (433) may include a first part (433a) extending in one direction (e.g., upward) from the opening (413) of the first tray wall (410) forming the opening (413).

[0389] The first part (433a) may constitute at least a portion of the first region (412a) or the second region (412b) of the first wall (412). The first part (433a) may form a contact surface that comes into contact with the second tray (300). The second tray (300) may form a second contact surface (312b) that comes into contact with the first part (433a). The second contact surface (312b) may form a contact surface that extends in one direction (e.g., in the vertical direction).

[0390] The third extension wall (433) may include a second part (433b) that extends in an inclined direction (e.g., upward) from the first part (433a). The second part (433b) may extend in an inclined direction away from the second tray (300).

[0391] The third extension wall (433) may include a third part (433c) extending in one direction (e.g., upward) from the second part (433b). A space defining a fluid flow path may be formed inside the third extension wall (433).

[0392] The above water supply unit (240) may include a portion located on the inner side of the third extension wall (433). The fluid of the above water supply unit (240) may be discharged from the inner space of the third extension wall (433) and fall onto the second tray (300).

[0393] Returning to FIG. 12, the connecting wall (434) may form a relatively thin first thickness (t1). The thickness of the connecting wall (434) may be substantially the same as the thickness of the first region (412a) of the first wall (412). By forming such a thickness, the first wall (412) may have a condition in which a relatively large amount of deformation is formed during the ice-breaking process.

[0394] Another embodiment can be proposed. The first region (412a) and the second region (412b) of the first wall (412) can be composed of different materials to have different degrees of deformation. For example, the material of the second region (412b) can be different from the material of the first region (412a) so that the degree of deformation of the second region (412b) can be greater than that of the first region (412a).

[0395] Figures 17 and 18 are drawings showing the operation of an ice maker according to the first embodiment of the present invention.

[0396] Fig. 17 is a drawing showing how ice is made in an ice maker according to a first embodiment of the present invention. When ice making is completed at the ice making positions of the first and second tray assemblies, ice (I) is created, and the second tray assembly can be moved to the ice removal position as shown in Fig. 18.

[0397] The direction in which the first tray assembly moves from the ice-making position of Fig. 17 to the ice-breaking position of Fig. 18 may be referred to as forward movement (or forward rotation). On the other hand, the direction in which the first tray assembly moves from the ice-breaking position of Fig. 18 to the ice-making position of Fig. 17 may be referred to as reverse movement (or reverse rotation).

[0398] When the driving unit (510) is driven in the forward direction by a set angle, the contact between the ice and the second tray (300) is separated, and the ice (I) can move to a state where it is located on the first tray (400). Since the adhesion force (or contact area) between the ice and the first tray (400) is formed to be large, the adhesion force (or contact area) between the ice and the second tray (300) can be easily separated during the ice-making process.

[0399] By the pusher (540) pressuring one end (e.g., the lower end) of the first tray (400), ice can be separated from the first tray (400). In the process of separating the ice from the first tray (400), the first tray (400) can be deformed in a direction in which the diameter of the opening (413) expands. For this purpose, the first tray (400) can be made of, for example, a flexible or soft material. The separated ice can be completely separated from the first tray (400) and stored in the ice bin (600).

[0400] When the ice-making operation is completed, the first tray assembly can move in the reverse direction and return to the ice-making position as shown in FIG. 17. When the water supply operation is started at the position of FIG. 17, the first tray assembly moves in the forward direction toward the water supply position, and the material (M) is supplied through the water supply unit (240) at the water supply position, and the fluid can be supplied to a plurality of cells (360). When the water supply is completed, the system can wait for a set time so that water can spread and be supplied from one cell (center cell) to the other cells (both side cells).

[0401] When the set time has elapsed, the first tray assembly can move backward to the ice-making position as shown in Fig. 17 and perform an ice-making operation. During the ice-making process, cold is supplied to the ice maker and the transparent ice heater (490) operates to produce transparent ice.

[0402] Fig. 19 is a graph showing changes in the pulling force measured according to the pulling distance during the ice-breaking process, Fig. 20 is a drawing showing the configuration of a pusher according to the first embodiment of the present invention, and Fig. 21 is a schematic diagram showing a difference in the maximum ice-breaking force time point depending on the difference in the length of the pusher during the ice-breaking process.

[0403] Referring to Fig. 19, during the process of ice separation after ice making is completed in the cell (360), the pulling power generated from the motor (510) may change. The distance from the center height of the cell (360) to the first opening (413) of the first tray (400) may be defined as the first distance (△), and the distance along which the ice made in the ice separation direction is taken out may be defined as the pulling distance (h).

[0404] [A] shows the withdrawal distance (h) being ho at the point where ice making is complete, and [B] to [D] show the withdrawal distance being h1 to h3. The ho may be 0. Looking at the change in the withdrawal force from [A] to [D] as the withdrawal distance increases, as the withdrawal distance increases from ho (0) toward [B], the withdrawal force increases due to interference between the ice and the first tray (400).

[0405] When the withdrawal distance is ho, the withdrawal power can form F1. The above F1 can be 0. During the ice withdrawal process, the opening (413) of the first tray (400) expands, and during this process, the withdrawal power (ice moving torque) of the motor (510) can increase.

[0406] The above-mentioned pulling power can increase until the state of [B], i.e., the pulling distance corresponds to h1. For example, the pulling distance (h1) can correspond to 1 / 2 of the first distance (△). When the pulling distance is h1, the pulling power can form F2. When the pulling distance of the ice begins to increase further from h1, the restoring force of the first tray (400) helps in pulling out the ice, and in this process, the pulling power of the motor (510) can decrease.

[0407] The above-mentioned extraction power forms F3 when the state of [C], that is, when the extraction distance is h2, and the F3 may be smaller than F2. For example, the extraction distance (h2) may be equal to or substantially equal to the first distance (△). As the extraction of ice continues in the state of [C], the extraction power of the motor (510) decreases, and the extraction power is at the minimum at the extraction distance (h2').

[0408] The above-mentioned extraction distance (h2') corresponds to the extraction distance between [C] and [D], and at the above-mentioned extraction distance (h2'), the extraction power (freezing torque) of the motor (510) forms a force in the opposite direction. When the above-mentioned extraction distance increases from h2', the extraction power of the motor increases, and in the state [D] where the ice is completely separated, the extraction power of the motor converges to 0. In this way, based on the change in the extraction power of the motor (510) during the ice separation process, the pusher (540) according to the first embodiment of the present invention can be configured to provide a difference at the maximum input point of the motor.

[0409] The pusher (540) may include a plurality of pushing bars (544) corresponding to a plurality of cells (360). The plurality of pushing bars (544) may have different lengths. The plurality of pushing bars (544) may include a first pushing bar (544a) having a first length (E1), a second pushing bar (544b) having a second length (E2), and a third pushing bar (544c) having a third length (E3).

[0410] The above third length (E3) may be greater than the above second length (E2) by a second length difference (△).

[0411] The above second length (E2) may be greater than the above first length (E1) by the first length difference (△).

[0412] Depending on the difference in length of the above pushing bar (544), after the point in time when the pulling force generated in the cell (360) moved by the third pushing bar (544c) is at its maximum has passed, the point in time when the pulling force is at its maximum in the cell (360) moved by the second pushing bar (544b) may arrive.

[0413] After the point in time when the pulling force is maximum in the cell (360) being moved by the second pushing bar (544b) has passed, the point in time when the pulling force is maximum in the cell (360) being moved by the first pushing bar (544a) may arrive. With this configuration, when ice is moved from multiple cells (360), the point in time when the maximum pulling torque is reached in each cell may be differentiated, and thus the load of the motor (510) may be distributed. As a result, the timing of ice moving may vary in multiple cells (360).

[0414] Figure 22 is an experimental graph showing the change in maximum ice-breaking force according to the ratio of ice diameter to the opening diameter of the first tray. Referring to Figure 22, the horizontal axis represents the ratio of the diameter of the first opening (413) of the first tray (400) to the ice diameter. The vertical axis represents the maximum ice-breaking force generated by the motor (510). The maximum ice-breaking force can be understood as the ice-breaking force generated by the motor (510) when ice is separated from the first tray (400).

[0415] The starting point of the horizontal axis represents 50%, and the ending point represents 100%. The starting point represents that the diameter of the first opening (413) is half the diameter of the ice, and the ending point represents that the diameter of the first opening (413) is the same as the diameter of the ice. At the ending point, the maximum ice-breaking power of the motor (510) may be substantially close to 0.

[0416] In an embodiment of the present invention, in order for ice to be normally separated from the first tray (400), it is preferable that the maximum ice separation force be formed to be less than or equal to the reference ice separation force (Fo). If the maximum ice separation force is greater than or equal to the reference ice separation force (Fo), it can be understood that there is a high possibility that ice separation will not occur from the first tray (400) even though sufficient ice separation force has been generated, and only deformation will occur in the first tray (400) while storing ice.

[0417] Experimental results show that the desired ice breaking performance can be achieved when the ratio is formed in a range that corresponds to a standard ice breaking power (Fo) or less, that is, 70% or more and less than 100%. Therefore, in this embodiment, the ratio of the diameter of the first opening (413) of the first tray (400) to the diameter of the ice is proposed to be 70% or more and less than 100%.

[0418] Figure 23 is an experimental graph showing the change in the insertion depth of the pushing bar at which the maximum icing force is generated, depending on the hardness of the first tray. Referring to Figure 23, the horizontal axis represents the hardness (H) of the first tray (400), and the vertical axis represents the insertion depth at which the maximum icing force is generated.

[0419] The insertion depth of the vertical axis above may represent the insertion depth of the pushing bar (544) at the time of separation from the first tray (400). That is, the insertion depth may be understood as the distance that the pushing bar (544) moves from the time the pushing bar (544) comes into contact with the first tray (400) to the time of separation. If the insertion depth is too large, it may be understood that even if the pushing bar (544) is sufficiently inserted toward the first tray (400), ice is not separated, and only the first tray (400) is deformed while storing ice.

[0420] As a result of the experiment, if the hardness of the first tray (400) is too low, that is, below H1, the ductility increases, so that the separating may not occur well. On the other hand, if the hardness of the first tray (400) is too high, that is, above H2, the deformation of the first tray (400) does not occur well, so that the insertion of the pushing bar (544) may not occur easily. Therefore, in the present embodiment, in order to obtain the desired separating performance, the hardness (H) is determined in a range in which the insertion depth is greater than the first depth (Dp1) and less than the second depth (Dp2).

[0421] The silicon hardness (H) may be greater than the first hardness (H1) so that the above insertion depth is formed to be smaller than the second depth (Dp2). The above insertion depth may be configured to be formed to be larger than the first depth (Dp1) so that the first hardness (H2) is formed to be smaller than the first depth (Dp1).

[0422] For example, the first depth (Dp1) may be a value corresponding to 14% of the diameter of the ice. The second depth (Dp2) may be a value corresponding to 35% of the diameter of the ice.

[0423] In summary, the hardness of the first tray (400) may be determined to be a value greater than the first hardness (H1) and less than the second hardness (H2) so that the insertion depth is formed in a range of 14% to 35% of the diameter of the ice. The first tray (400) may be composed of a deformable material, for example, silicon.

[0424] Hereinafter, additional embodiments of the present invention will be described. Since these additional embodiments differ from the first embodiment in the configuration of the first tray, the description will focus on the differences, and for the same parts as the first embodiment, the description and drawing references of the first embodiment will be used.

[0425] FIG. 24 is a perspective view of a first tray according to a second embodiment of the present invention, FIG. 25 is a side view of the first tray, FIG. 26 is a cross-sectional view taken along line 26-26 of FIG. 24, FIG. 27 is a cross-sectional view taken along line 27-27 of FIG. 24, FIG. 28 is a front view of the first tray, and FIG. 29 is a cross-sectional view taken along line 29-29 of FIG. 28.

[0426] Referring to FIGS. 24 to 29, a first tray (400a) according to a second embodiment of the present invention may include a first tray wall (1410) forming a portion of a cell (360). The first tray wall (1410) may include a first part (1411) positioned on one side (e.g., a lower side) of the first extension wall (420) with respect to the first extension wall (420). The first part (1411) may form a portion (e.g., a lower portion) of the cell (360).

[0427] The first tray wall (1410) may include a second part (1412) positioned on the other side (e.g., upper side) of the first extension wall (420) with respect to the first extension wall (420). The second part (1412) may form a part of another part of the cell (360) (e.g., upper part).

[0428] One end (e.g., the upper end) of the second part (1412) may form the first opening (413). The first opening (413) forms a contact end (412c) with which the second tray (300) makes contact, and the second extension wall (431) of the first tray (400a) may extend obliquely in one direction (e.g., upward) from the contact end (412c).

[0429] As described in the first embodiment, the first part (1411) may be referred to as a “second wall,” and the second part (1412) may be referred to as a “first wall.” The first wall (1412) may include a plurality of regions having different degrees of internal deformation. The first wall (1412) may include a first region (1412a) having a first degree of internal deformation and a second region (1412b) having a second degree of internal deformation that is greater than the first degree of internal deformation.

[0430] The second region (1412b) may protrude from the first region (1412a). The second region (1412b) may be formed in the circumferential direction of the first region (1412a).

[0431] The second region (1412b) may include a first rib (1412b1) extending from the first extension wall (420) in a direction corresponding to the first opening (413), i.e., the moving direction. A plurality of the first ribs (1412b1) may be provided spaced apart from each other in one direction of the first region (1412a). For example, the one direction may be a circumferential direction.

[0432] The second region (1412b) may include a second rib (1412b2) extending in the one direction and connecting two adjacent first ribs (1412b1).

[0433] The first tray (400a) may include a third extension wall (1433) extending from the second tray wall (1410) and forming a flow path for the supplied fluid. The third extension wall (1433) may include a first wall part (1434) extending in the direction in which the plurality of cells are arranged, i.e., in the direction in which the plurality of tray parts (401a, 401b, 401c) forming the plurality of cells are arranged.

[0434] The third extension wall (1433) may include a second wall part (1435) that extends from at least one end of the first wall part (1434) to the second extension wall (431) and is connected to the second extension wall (431). The internal space defined by the first wall part (1434) and the second wall part (1435) may form a fluid flow path. The third extension wall (1433) of the first tray (400b) may be in contact with the second tray (300).

[0435] Fig. 26 is a cross-sectional view showing a cut line passing through the third extension wall (1433) without passing through the first rib (1412b1), and Fig. 33 is a cross-sectional view showing a cut line passing through the first rib (1412b1) and the third extension wall (433).

[0436] Referring to Fig. 26, the second wall (411) can form a second thickness (t2). The first region (1412a) of the first wall (1412) can form the first thickness (t1). The second extended wall (431) can form the first thickness (t1). The thickness of the third extended wall (433) can form a third thickness (t2).

[0437] The second thickness (t2) may be greater than the first thickness (t1). The third thickness (t3) may be equal to or slightly smaller than the second thickness (t2).

[0438] Referring to Fig. 27, in order to reinforce the thin thickness of the first region (1412a), the first tray (400) may include a first rib (1412b1, reinforcing rib). A portion of the first wall (1412) on which the first rib (1412b1) is provided may have a second thickness (t2). A portion of the first wall (1412) on which the second rib (1412b2) is provided may have a second thickness (t2).

[0439] The first rib (1412b1) may form a part of the second region (412b). The first rib (1412b1) may be provided on the outer surface of at least one of the first region (1412a) and the second extension wall (431). The first ribs (1412b1) are arranged in multiple numbers spaced apart from each other in one direction of the first wall (1412), so that the expansion rate of the first wall (1412) may be evenly maintained in the one direction. For example, the one direction may be a circumferential direction.

[0440] The thickness (t2) of the third extension wall (1433) may be formed to be greater than the thickness (t1) of the first region (1412a) of the first wall (1412) so as not to be easily deformed by fluid pressure.

[0441] Another embodiment can be proposed. The first region (1412a) and the second region (1412b) of the first wall (1412) can be composed of different materials to have different degrees of deformation. For example, the material of the second region (1412b) can be different from the material of the first region (1412a) so that the degree of deformation of the second region (1412b) can be greater than that of the first region (1412a).

[0442] FIG. 30 is a perspective view of a first tray according to a third embodiment of the present invention, FIG. 31 is a side view of the first tray, FIG. 32 is a plan view of the first tray, FIG. 33 is a bottom view of the first tray, FIG. 34 is a cross-sectional view taken along line 34-34 of FIG. 30, FIG. 35 is a cross-sectional view taken along line 35-35 of FIG. 30, FIG. 36 is a front view of the first tray, FIG. 37 is a cross-sectional view taken along line 37-37 of FIG. 36, and FIG. 38 is a cross-sectional view taken along line 38-38 of FIG. 36.

[0443] Referring to FIGS. 30 to 38, a first tray (400b) according to a third embodiment of the present invention may include a first tray wall (2410) forming a portion of a cell (360). The first tray wall (2410) may include a first part (2411) positioned on one side (e.g., a lower side) of the first extension wall (420) with respect to the first extension wall (420). The first part (2411) may form a portion (e.g., a lower portion) of the cell (360).

[0444] The first tray wall (2410) may include a second part (2412) positioned on the other side (e.g., upper side) of the first extension wall (420) with respect to the first extension wall (420). The second part (1412) may form a part of another part of the cell (360) (e.g., upper part).

[0445] One end (e.g., the upper end) of the second part (2412) may form the first opening (413). The first opening (413) forms a contact end (412c) with which the second tray (300) comes into contact, and the second extension wall (431) of the first tray (400b) may extend in an inclined direction (e.g., upward) from the contact end (412c).

[0446] The first wall (2412) may include a plurality of regions having different internal strains. The first wall (2412) may include a first region (2412a) having a first internal strain and a second region (2412b) having a second internal strain that is greater than the first internal strain.

[0447] The second region (2412b) may protrude from the first region (2412a). The second region (2412b) may be formed in the circumferential direction of the first region (2412a).

[0448] The second region (2412b) may include a rib (2412b) extending from the first extension wall (420) in a direction corresponding to the moving direction, i.e., toward the first opening (413). A plurality of ribs (2412b) may be provided spaced apart from each other in the circumferential direction of the first region (2412a).

[0449] Referring to FIG. 33, the second edge (422b') may have a bent shape to connect the second tray part (401b) and the third tray part (401c). One end of the second edge (422b') may be connected to the second tray part (401b). The other end of the second edge (422b') may be connected to the third tray part (401c).

[0450] The above second edge (422b') may include a portion bent in a “ㄷ” shape to connect the one end and the other end.

[0451] Figure 34 is a cross-sectional view showing a cut line passing through the third extension wall (1433) without passing through the rib (2412b), and Figure 35 is a cross-sectional view showing a cut line passing through the rib (2412b) and the third extension wall (1433).

[0452] Referring to FIG. 34, the second wall (2411) can form a second thickness (t2). The first region (2412a) of the first wall (2412) can form the first thickness (t1). The second extension wall (431) can form the first thickness (t1). The thickness of the third extension wall (433) can form a third thickness (t3).

[0453] The second thickness (t2) may be greater than the third thickness (t3), and the third thickness (t3) may be greater than the first thickness (t1). In order to reinforce the thin thickness of the first region (2412a), the first tray (400) may include a rib (2412b, reinforcing rib).

[0454] A portion of the first wall (2412) provided with the rib (2412b) may have a second thickness (t2). The rib (2412b) may form a portion of the second region (2412b). The rib (2412b) may be provided on the outer surface of at least one of the first region (2412a) and the second extension wall (431).

[0455] The first ribs (2412b) are arranged in multiple numbers spaced apart from each other in one direction of the first wall (2412), so that the expansion rate of the first wall (2412) can be maintained evenly in the one direction. For example, the one direction may be a circumferential direction.

[0456] The thickness (t2) of the third extension wall (1433) may be formed to be greater than the thickness (t1) of the first region (2412a) of the first wall (2412) so as not to be easily deformed by fluid pressure.

[0457] Another embodiment can be proposed. The first region (2412a) and the second region (2412b) of the first wall (2412) can be composed of different materials to have different degrees of deformation. For example, the material of the second region (2412b) can be different from the material of the first region (2412a) so that the degree of deformation of the second region (2412b) can be greater than that of the first region (2412a).

[0458] Referring to FIGS. 37 and 38, the first wall (2412) may include a reinforcing rib (2412d). The reinforcing rib (2412d) may be provided on at least one of the portion of the outer circumferential surface of the first wall (2412) that is connected to the second extension wall (431) and the portion that is connected to the third extension wall (1433).

[0459] The second extension wall (431) is likely to be deformed due to its own weight since it extends upward from the point of contact with the second tray (300). Meanwhile, if the first tray (400) is folded when moving backward from the ice-making position to the ice-making position, a problem of interference with the second tray (300) may occur. Therefore, a reinforcing rib (2412d) may be provided at the point where the second extension wall (431) is connected among the first walls (2412) to increase the deformation resistance of the second extension wall (431).

[0460] The third extension wall (1433) may form a flow path for supplying fluid to the cell during the water supply process. The third extension wall (433) may be deformed due to the hydraulic pressure of the fluid. Therefore, a reinforcing rib (2412d) may be provided at the point where the third extension wall (1433) is connected to the first wall (2412) to increase the internal deformation of the third extension wall (1433).

[0461] The above reinforcing rib (2412d) may be configured to protrude from the first region (2412a) and have a predetermined width in the circumferential direction. The above reinforcing rib (2412d) may be configured to extend in the ejection direction from the first extension wall (420) to the first opening (413).

[0462] The above rib (2412b) may be provided on the outer surface of the pocket (2412d). The above reinforcing rib (2412d) may also be provided on the outer surface of the first wall (2412) where the rib (2412b) is not provided. The above rib (2412b) may be referred to as a “first rib” and the above reinforcing rib (2412d) may be referred to as a “second rib.”

[0463] FIG. 39 is a perspective view of a first tray according to a fourth embodiment of the present invention, FIG. 40 is a side view of the first tray, FIG. 41 is a cross-sectional view taken along line 41-41 of FIG. 39, FIG. 42 is a cross-sectional view taken along line 42-42 of FIG. 39, FIG. 43 is a front view of the first tray, FIG. 44 is a cross-sectional view taken along line 44-44 of FIG. 43, and FIG. 45 is a cross-sectional view taken along line 45-45 of FIG. 43.

[0464] Referring to FIGS. 39 to 45, a first tray (400c) according to a fourth embodiment of the present invention may include a first wall (3412) and a second wall (3411). The first wall (3412) may include a portion having a smaller deformation resistance than the second wall (3411).

[0465] The first wall (3412) may include a first region (3412a) having a first thickness (t1) and a second region (3412b) having a second thickness (t2) greater than the first thickness (t1).

[0466] The second region (3412b) may include a rib protruding from the first region (3412a). The rib may include a first rib (3412b1) extending in a circumferential direction. The rib may include a second rib (3412b2) extending from the first rib (3412b1) in a direction toward the opening (413).

[0467] The first rib (3412b1) may have a polygonal shape, for example, a shape in which triangles are repeatedly arranged in the circumferential direction. The second rib (3412b2) may extend from the tip of the first rib (3412b1) in a direction toward the first opening (413). For example, the second rib (3412b2) may have a belt or bar shape.

[0468] Figure 41 is a cross-sectional view showing a cut line passing through the third extension wall (1433) without passing through the second rib (3412b2), and Figure 48 is a cross-sectional view showing a cut line passing through the second rib (3412b2) and the third extension wall (1433).

[0469] The second wall (3411) can form a second thickness (t2). The first region (3412a) of the first wall (3412) can form the first thickness (t1). The second extended wall (431) can form the first thickness (t1). The thickness of the third extended wall (1433) can form a third thickness (t3).

[0470] The second thickness (t2) may be greater than the third thickness (t3). The third thickness (t3) may be greater than the first thickness (t1). The first wall (3412) may be configured such that the size of the first region (3412a) having the first thickness (t1) increases from the first extension wall (420) toward the first opening (413).

[0471] For example, the first and second parts of the second region (3412b) having the second thickness (t2) may be spaced apart from each other, and a first region (3412a) may be provided between the first and second parts. For example, the first and second parts may be spaced apart from each other in the circumferential direction.

[0472] The area of ​​the first region (3412a) may increase as it moves toward the first opening (413). With this configuration, the expansion rate can be maintained evenly in the circumferential direction of the first wall (3412) during the ice-making process.

[0473] Referring to FIG. 42, in order to reinforce the thin thickness of the first region (3412a), the first tray (400c) may include a second rib (3412b2, reinforcing rib).

[0474] A portion of the first wall (3412) provided with the second rib (3412b2) may have a second thickness (t2). The second rib (3412b2) may form a portion of the second region (3412b). The second rib (3412b2) may be provided on the outer surface of the first region (3412a).

[0475] The second ribs (3412b2) are arranged in multiple numbers spaced apart from each other in the circumferential direction of the first wall (3412), so as to maintain an even expansion rate in the circumferential direction of the first wall (3412). The thickness (t3) of the third extension wall (1433) may be formed to be larger than the thickness (t1) of the first region (412a) of the first wall (412) and the second extension wall (431) so as not to be easily deformed by the pressure of the fluid.

[0476] Another embodiment can be proposed. The first region (3412a) and the second region (3412b) of the first wall (3412) can be composed of different materials to have different degrees of deformation. The materials of the second region (3412b) and the first region (3412a) can be different so that the degree of deformation of the second region (3412b) can be greater than that of the first region (3412a).

[0477] FIG. 46 is a perspective view of a first tray according to a fifth embodiment of the present invention, FIG. 47 is a side view of the first tray, FIG. 48 is a cross-sectional view taken along line 48-48 of FIG. 46, FIG. 49 is a cross-sectional view taken along line 49-49 of FIG. 46, FIG. 50 is a front view of the first tray, FIG. 51 is a cross-sectional view taken along line 51-51 of FIG. 50, and FIG. 52 is a cross-sectional view taken along line 52-52 of FIG. 56.

[0478] Referring to FIGS. 46 to 52, a first tray (400d) according to a fifth embodiment of the present invention may include a first wall (4412) and a second wall (4411). The first wall (4412) may include a portion having a smaller deformation resistance than the second wall (4411).

[0479] The first wall (4412) may include a first region (4412a) having a first thickness (t1) and a second region (4412b) having a second thickness (t2) greater than the first thickness (t1).

[0480] The second region (4412b) may include a rib (4412b) protruding from the first region (4412a). The rib (4412b) may extend in the circumferential direction of the first region (4412a). For example, the rib (4412b) may have a ring shape.

[0481] The second region (4412b) is connected to the first extension wall (420) and may be configured to have a predetermined height. The first region (4412a) may extend from the second region (4412b) in a direction toward the first opening (413).

[0482] The second wall (4411) can form a second thickness (t2). The first region (4412a) of the first wall (4412) can form the first thickness (t1). The second extended wall (431) can form the first thickness (t1). The thickness of the third extended wall (1433) can form a third thickness (t3).

[0483] The second thickness (t2) may be greater than the third thickness (t3), and the third thickness (t3) may be greater than the first thickness (t1). Since the second region (4412b) includes a rib (4412b) extending in the circumferential direction, the expansion rate of the first wall (4412) may be evenly maintained in the circumferential direction during the ice-making process.

[0484] The diameters of the plurality of cells (360) according to the fifth embodiment of the present invention may be formed differently. For example, the plurality of cells (360) may include a first cell (360a) at the center, and second cells (360b) and third cells (360c) at both sides.

[0485] At least two of the diameter (D11) of the first cell (360a), the diameter (D12) of the second cell (360b), and the diameter (D13) of the third cell (360c) may be formed to have different sizes. For example, D11 may be larger than D12, and D13 may be larger than D11. For example, D11 may be formed to be 49 mm, D12 to be 48 mm, and D13 to be 50 mm.

[0486] At least two of the diameter (D21) of the opening (413a) of the central tray part defining a part of the first cell (360a), the diameter (D22) of the opening (413b) of the first lateral tray part defining a part of the second cell (360b), and the diameter (D23) of the opening (413c) of the second lateral tray part defining a part of the third cell (360c) may be formed to have different sizes. For example, D22 may be larger than D21, and D21 may be larger than D23. For example, D21 may be formed to be 47 mm, D22 to be 45 mm, and D23 to be 49 mm.

[0487] The above D21, D22, and D23 may correspond to the diameter of the opening of the second tray (400d). In order to implement this configuration, the height (△S1) of the opening (413b) with respect to the center of the height in one direction (e.g., in the vertical direction) of the second cell (360b) may be greater than the height (△S2) of the opening (413c) with respect to the center of the height in the vertical direction of the third cell (360c).

[0488] Based on the contact area between the second tray (300) and the ice, the contact area on the third cell (360c) side may be larger than the contact area of ​​the first cell (360a) on the central side. The contact area of ​​the first cell (360a) on the central side may be larger than the contact area on the second cell (360b) side. According to this configuration, when the driving unit (510) is driven to separate ice made in a plurality of cells (360), the deformation amount of the second tray (400d), that is, the deformation amount according to the difference between the diameter of the ice and the diameter of the opening of the second tray (400d), may vary over time, so there is an advantage in that the separation torque can be reduced.

[0489] Another embodiment can be proposed. The first region (4412a) and the second region (4412b) of the first wall (4412) can be composed of different materials to have different degrees of deformation. The materials of the second region (4412b) and the first region (4412a) can be different so that the degree of deformation of the second region (4412b) can be greater than that of the first region (4412a).

[0490] The present invention relates to an ice maker and / or a refrigerator equipped with an ice maker, and has remarkable industrial applicability because it includes a tray forming an opening smaller than the diameter of ice, and ice can be easily discharged by utilizing deformation of the tray.

Claims

1. A storage room where food is stored; A door for opening and closing the above storage room; An ice making room provided in the above door or the above storage room; A cooler for supplying cold to the above storage room; A cell, which is a space provided in the above ice making room where a substance changes from a liquid to a solid state; and A tray wall comprising a first wall forming at least a portion of the cell and a second wall forming another portion of the cell, A refrigerator wherein the first wall includes a portion having a degree of deformation smaller than that of the second wall.

2. In paragraph 1, The above first wall is, A refrigerator including a portion in which the internal deformation in the radial direction of the cell or the internal deformation in the moving direction is smaller than that of the second wall.

3. In paragraph 1, The above first wall is, A refrigerator including a portion in which the internal deformation in the radial direction of the cell is smaller than the internal deformation in the moving direction.

4. In paragraph 1, The above first wall is, A refrigerator configured such that the degree of internal deformation in the radial direction of the cell varies along the moving direction of the cell, or such that the degree of internal deformation in the moving direction of the cell varies along the radial direction of the cell.

5. In paragraph 1, A refrigerator wherein the first rate of change in the radial internal deformation of the cell varies along the moving direction of the cell is formed to be greater than the second rate of change in the radial internal deformation of the cell varies along the radial direction of the cell.

6. In paragraph 1, A refrigerator wherein the first wall includes a first region having a first thickness and a second region having a second thickness greater than the first thickness.

7. In paragraph 6, A refrigerator in which, in the first wall, the ratio of the first region to the total area of ​​the first region and the second region is formed to be greater than the ratio of the second region.

8. In paragraph 6, A refrigerator in which the second region is formed closer to the center of the cell among the center of the cell and the opening of the tray wall, the opening being a through hole through which a solid substance is discharged.

9. In paragraph 8, A refrigerator in which the first region is formed closer to the center of the cell and the opening of the tray wall, the opening being a through hole through which a solid substance is discharged.

10. In paragraph 8, A refrigerator wherein the first region is configured to increase from the center of the cell toward the opening.

11. In paragraph 8, A refrigerator wherein the second region extends from the center of the cell toward the opening in the shape of a triangle, a rhombus, an arc, or an inverted Y.

12. In paragraph 6, A refrigerator wherein the second region includes a first portion and a second portion extending in a circumferential direction, and at least a portion of the first region is located between the first portion and the second portion.

13. In paragraph 12, A refrigerator in which, when defining a circumferential extension line (ℓ1) passing through a portion of the first wall, the extension line (ℓ1) alternately passes through the first area and the second area.

14. In paragraph 6, A refrigerator wherein the second region includes a first rib extending in a circumferential direction of the first wall and a second rib connected to the first rib and extending toward an opening in the tray wall.

15. In paragraph 6, A refrigerator wherein the second region includes a rib extending in a moving direction from the center of the cell toward the opening of the tray wall.

16. In paragraph 15, The above rib comprises a plurality of ribs spaced apart in the circumferential direction, A refrigerator wherein the second region includes an additional rib extending circumferentially and connecting the plurality of ribs.

17. In paragraph 6, The above first area and the above second area are formed integrally, or A refrigerator in which the first area and the second area are provided separately and then combined.

18. In paragraph 17, A refrigerator in which the first region and the second region are formed of different materials so that the internal deformation of the first region and the internal deformation of the second region are formed differently.

19. In paragraph 1, The above tray wall includes an opening through which a solid material is discharged, A refrigerator wherein the diameter of the opening is formed to be 70% or more and less than 100% of the diameter of the cell.

20. In paragraph 1, Including a pusher for pressurizing the above tray wall, The hardness of the above tray wall is: A refrigerator in which the insertion depth of the pusher at which the maximum ice-breaking force is generated is determined to be a value greater than the first hardness (H1) and smaller than the second hardness (H2) so that the depth is formed in a range of 14% to 35% of the diameter of the ice.

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