refrigerator

Abstract

A refrigerator according to one embodiment comprises: an ice-making chamber providing a space in which ice is made; a cooler for supplying cold to the ice-making chamber; and an ice maker having ice-making cells, which are spaces in which water phase-changes into ice by means of the cold, wherein the ice maker includes: a first tray assembly including a first tray forming a portion of the ice-making cells; and a second tray assembly including a second tray forming the other portion of the ice-making cells, the ice-making cells are aligned in a plurality of rows, and each of the plurality of rows includes the plurality of ice-making cells.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a refrigerator.BACKGROUND ART

[0002] In general, a refrigerator is a home appliance for storing food at a low temperature in a storage space that is covered by a door. The refrigerator is configured to keep stored food in in a refrigerated state or frozen state by cooling an inside of the storage space using cold air.

[0003] Typically, an ice maker to make ice is provided in a freezing chamber of a refrigerator. The ice maker receives water supplied from a water source or a water tank in a tray and cools the water to make ice. The ice generated in the ice maker may be stored in an ice bin. Ice stored in the ice bin can be taken out of the ice bin by a user opening a freezing chamber door and approaching the ice bin.

[0004] A refrigerator is disclosed in Korean Patent Publication No. 10-2016-0136659 that is a prior art document (hereinafter referred to as “first prior art document”.

[0005] A refrigerator of a first prior art document includes a storage chamber where food is stored; a first tray assembly provided in the storage chamber and forming a part of an ice making cell, which is a space where water is phase-changed into ice by cold; and a second tray assembly forming another part of the ice making cell.

[0006] In the case of the first prior art document, spherical ice can be generated using the first and second tray assemblies, but there is a disadvantage in that a user must open a door to use the ice.

[0007] In the case of the first prior art document, since only a small amount of ice can be generated at one time, there is a disadvantage in that a lot of waiting time is required when a large amount of ice is to be used.

[0008] An ice maker and an ice bank provided in a refrigerating chamber door is disclosed in Chinese Patent Publication No. 114174740A10-2016-0136659 that is a prior art document (hereinafter referred to as “second prior art document”).

[0009] Ice stored in the ice bank can be taken out through a dispenser assembly. The ice maker includes an elastic mold that forms a cavity and is formed of an elastic material, a heat exchanger that is connected to the elastic mold and freezes water in the cavity, an elevating mechanism that easily discharges the ice from the cavity, and a driving mechanism that drives the elevating mechanism. The driving mechanism includes a motor and a rotating cam.

[0010] In the case of the second prior art document, spherical ice cannot be generated, and in a structure where the elevating mechanism presses the elastic mold from below, there is a disadvantage that it is difficult for the ice to separate from the elastic mold and fall downward. In order to completely separate the ice from the elastic mold, a vertical movement range of the elevating mechanism must be increased, and in this case, a size of the rotating cam must be increased, which has the disadvantage of increasing an overall size of the ice maker.DISCLOSURETechnical Problem

[0011] One embodiment provides a refrigerator capable of increasing a number of generated ices during one ice making process.

[0012] Alternatively or additionally, one embodiment provides a refrigerator capable of increasing an ice making amount per unit time within a limited space.

[0013] Alternatively or additionally, one embodiment provides a refrigerator capable of generating spherical ice from a door.

[0014] Alternatively or additionally, one embodiment provides a refrigerator capable of easily discharging generated ice from a dispenser of a door.Technical Solution

[0015] In one embodiment, a refrigerator may include an ice making chamber to provide a space in which ice is generated. The refrigerator may further include a cooler. The cooler may supply cold or operable to supply cold to the ice making chamber.

[0016] The refrigerator may further include an ice maker. The ice maker may be disposed in the ice making chamber. An ice maker of one aspect may include a first tray assembly. The first tray assembly may define a portion of an ice making cell, which is a space in which water is phase-changed into ice by cold. The ice maker may further include a second tray assembly. The second tray assembly may define another portion of the ice making cell.

[0017] The first tray assembly may include a first tray. The second tray assembly may include a second tray.

[0018] Ice making cells are arranged in a plurality of rows, and each of the plurality of rows may include a plurality of ice making cells.

[0019] A number of a plurality of ice making cells in a first row among the plurality of rows may be different from a number of a plurality of ice making cells in a second row.

[0020] The second tray assembly may be rotated relative to the first tray assembly with respect to a rotation center. The first row may be positioned closer to the rotation center than the second row. A number of a plurality of ice making cells in the first row may be less than a number of a plurality of ice making cells in the second row.

[0021] The refrigerator may further include an ice making chamber door that opens and closes the ice making chamber. The second row may be positioned closer to the ice making chamber door than the first row. A number of a plurality of ice making cells in the first row may be less than a number of a plurality of ice making cells in the second row.

[0022] A plurality of rows includes a first row and a second row, and the first row and the second row may be arranged in a Y-axis direction. One ice making cell of the first row may overlap two ice making cells of the second row adjacent to the one ice making cell in a Y-axis direction.

[0023] A plurality of ice making cells are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and when a plurality of rows are even rows, a diameter (D) of the ice making cell may satisfy L×20 / 76≤D≤L×27 / 76.

[0024] The plurality of ice making cells are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction. When a plurality of rows are odd rows, a diameter (D) of ice making cell may satisfy L×17 / 76≤D≤L×20 / 76.

[0025] An ice making cell of the first row and an ice making cell of the second row may be spaced apart from each other by a set distance in a Y-axis direction or overlapped by a set width in an X-axis direction.

[0026] The plurality of ice making cells are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and in a specific row having a largest number of ice making cells among the plurality of rows, a diameter (D) of the ice making cell may satisfy W×20 / 197≤D≤W×27 / 197.

[0027] A distance between two adjacent ice making cells in the first row among the plurality of rows may be different from a distance between two other adjacent ice making cells in the first row.

[0028] Among the plurality of rows, a distance between two adjacent ice making cells in the second row may be different from a distance between two other adjacent ice making cells in the second row.

[0029] A line connecting a center of one ice making cell in the first row and centers of two ice making cells in the second row adjacent to the one ice making cell may be an equilateral triangle.

[0030] A line connecting a center of one ice making cell in the second row and centers of two ice making cells in the first row adjacent to the one ice making cell may be an equilateral triangle.

[0031] A line connecting a center of another ice making cell in the first row and centers of two ice making cells in the second row adjacent to the other ice making cell may be a non-equilateral triangle.

[0032] A line connecting a center of another ice making cell in the second row and centers of two ice making cells in the first row adjacent to the other ice making cell may be a non-equilateral triangle.

[0033] A length of each of lines in the non-equilateral triangle may be different from each other.

[0034] The ice maker may further include a temperature sensor to detect a temperature of water or ice in the ice making cell. The temperature sensor may include a portion positioned between two adjacent ice making cells in the first row, or may include a portion positioned between two adjacent ice making cells in the second row.

[0035] In another embodiment, a refrigerator may include a cabinet having a storage space. The refrigerator may further include a door that opens and closes the storage space. The refrigerator may further include an ice making chamber provided in the door. The refrigerator may further include an ice maker provided in the ice making chamber and generating ice. The refrigerator may further include an ice bin for storing ice generated by the ice maker. The refrigerator may further include a dispenser provided in the door and for discharging ice stored in the ice bin.

[0036] The ice maker may include a first tray assembly having a first tray to define a portion of an ice making cell, and a second tray assembly having a second tray to define another portion of the ice making cell.

[0037] The ice making cell may include a plurality of ice making cells in a first row and a plurality of ice making cells in a second row. The first row may be positioned closer to a front surface of the door than the second row.

[0038] A number of the plurality of ice making cells in the first row may be less than a number of the plurality of ice making cells in the second row.

[0039] The plurality of ice making cells in the first row and the second row are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and a diameter (D) of the ice making cell may satisfy L×20 / 76≤D≤L×27 / 76.

[0040] In a case in which an additional third row is further included in addition to the first and second rows, a plurality of ice making cells of the first to third rows are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and a diameter (D) of the ice making cell may satisfy L×17 / 76≤D≤L×20 / 76.

[0041] A plurality of ice making cells of the first row and the second row are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and in a specific row having a largest number of ice making cells, a diameter (D) of the ice making cell may satisfy W×20 / 197≤D≤W×27 / 197.Advantageous Effects

[0042] According to one embodiment, there is an advantage in that a number of generated ices in one ice making process can be increased.

[0043] According to one embodiment, there is an advantage in that an ice making amount per unit time can be increased within a limited space.

[0044] According to one embodiment, there is an advantage in that spherical ice can be generated in a refrigerator door.

[0045] According to one embodiment, generated spherical ice can be easily discharged from a dispenser of a door.DESCRIPTION OF DRAWINGS

[0046] FIG. 1A is a front view of a refrigerator according to the present embodiment, and FIG. 1B is a drawing showing a state in which one door of a refrigerator is separated.

[0047] FIG. 2A is a perspective view of a front of a first refrigerating chamber door according to the present embodiment, and FIG. 2B is a perspective view of a rear of a first refrigerating chamber door according to the present embodiment.

[0048] FIG. 3A is a drawing showing a state in which a basket and a filter are separated from a first refrigerating chamber door, and FIG. 3B is a drawing showing a state in which an ice making chamber door and a cover member are separated from a first refrigerating chamber door.

[0049] FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 2A.

[0050] FIG. 5A is a drawing showing a state in which a cold air duct is connected to a door liner according to the present embodiment, and FIG. 5B is a drawing showing an ice making chamber wall of a door liner according to the present embodiment.

[0051] FIG. 6 is a drawing showing a state in which an ice maker is installed in a supporting portion according to the present embodiment.

[0052] FIG. 7 is a drawing showing an arrangement relationship between an ice maker and a cold air duct according the present embodiment.

[0053] FIG. 8A is a perspective view of an ice maker as viewed from one upper side according to the present embodiment, and FIG. 8B is a perspective view of an ice maker as viewed from another upper side according to the present embodiment.

[0054] FIG. 9A is a front view of an ice maker of a first embodiment, and FIG. 9B is a perspective view of an ice maker as viewed from a lower side according to the present embodiment.

[0055] FIG. 10 is an exploded perspective view of an ice maker according to the present embodiment.

[0056] FIG. 11 is an exploded front view of an ice maker according to the present embodiment.

[0057] FIG. 12A is a perspective view of a first tray as viewed from an upper side according to the present embodiment. FIG. 12B is a perspective view of a first tray as viewed from a lower side according to the present embodiment.

[0058] FIG. 13 is a bottom view of a first tray according to the present embodiment.

[0059] FIG. 14A is a perspective view of a first tray cover as viewed from an upper side according to the present embodiment. FIG. 14B is a perspective view of a first tray cover as viewed from a lower side according to the present embodiment.

[0060] FIG. 15A is a perspective view of a second tray assembly as viewed from an upper side according to the present embodiment. FIG. 15B is a perspective view of a second tray assembly as viewed from a lower side according to the present embodiment.

[0061] FIG. 16A is a perspective view of a second tray as viewed from one side according to the present embodiment, and FIG. 16B is a perspective view of a second tray as viewed from another side according to the present embodiment.

[0062] FIG. 17 is a perspective view of a second tray as viewed from a lower side according to the present embodiment.

[0063] FIG. 18 is a bottom view of a second tray according to the present embodiment.

[0064] FIG. 19 is a cross-sectional view showing an ice maker at a water supply position of a second tray assembly according to the present embodiment.

[0065] FIG. 20 is a cross-sectional view showing an ice maker at an ice making position of a second tray assembly according to the present embodiment.

[0066] FIG. 21 is a cross-sectional view showing an ice maker when a second tray assembly is to a full ice detection position in an ice separation process.

[0067] FIG. 22A is a cross-sectional view showing an ice maker in a state where a first column of a second pusher is in contact with a second tray, and FIG. 22B is a cross-sectional view showing an ice maker in a state where a second column of a second pusher is in contact with a second tray.

[0068] FIG. 23A is a drawing showing a state where a first column of a second pusher presses a second tray in an ice separation position, and FIG. 23B is a drawing showing a state where a second column of a second pusher presses a second tray in an ice separation position.

[0069] FIG. 24 is a control block diagram of a refrigerator according to the present embodiment.MODE FOR INVENTION

[0070] In this specification, at least one of component A and component B may be interpreted as comprising component A, or component B, or component A+B. Additionally, at least one of component A or component B may be interpreted as comprising component A, or component B, or component A+B.

[0071] FIG. 1A is a front view of a refrigerator according to a first embodiment, and FIG. 1B is a drawing showing a state in which one door of a refrigerator is separated. FIG. 1A is a front view of a refrigerator according to the present embodiment, and FIG. 1B is a drawing showing a state in which one door of a refrigerator is separated.

[0072] FIG. 2A is a perspective view of a front of a first refrigerating chamber door according to the present, and FIG. 2B is a perspective view of a rear of a first refrigerating chamber door according to the present. FIG. 3A is a drawing showing a state in which a basket and a filter are separated from a first refrigerating chamber door, and FIG. 3B is a drawing showing a state in which an ice making chamber door and a cover member are separated from a first refrigerating chamber door.

[0073] Referring to FIGS. 1 to 3, a refrigerator 1 of the present embodiment may include a cabinet 2. The cabinet 2 may have a storage space. The refrigerator 1 may further include a door that opens and closes the storage space. The door may be movably connected to the cabinet 2. The storage space may include a refrigerating chamber 18. The storage chamber may alternatively or additionally include a freezing chamber 19. As an example, FIG. 1B illustrates that the storage space includes a refrigerating chamber 18 and a freezing chamber 19.

[0074] The door may include a refrigerating chamber door 5 that opens and closes the refrigerating chamber 18. The refrigerating chamber 18 may be opened and closed by one or more refrigerating chamber doors 5.

[0075] The door may further include a freezing chamber door 30 that opens and closes the freezing chamber 19. The freezing chamber 19 may be opened and closed by one or more freezing chamber doors 30.

[0076] Hereinafter, an example will be described in which the refrigerating chamber 18 is opened and closed by a first refrigerating chamber door 10 and a second refrigerating chamber door 20.

[0077] At least one of the first refrigerating chamber door 10 or the second refrigerating chamber door 20 may include a dispenser 11 for discharging water and / or ice. Of course, depending on a type of a refrigerator, it is also possible for the freezing chamber door 30 to be provided with the dispenser 11.

[0078] At least one of the first refrigerating chamber door 10 or the second refrigerating chamber door 20 may include at least one ice maker 200.

[0079] If a refrigerator includes a plurality of ice makers, types of ice generated by the ice makers may be the same or different. Sizes (or volumes) of ice generated by the ice makers may be the same or different. A transparency of ice generated by the ice makers may be the same or different. In ice makers, structures for generating ice and methods for separating generated ice may be the same or different.

[0080] Hereinafter, an example in which an ice maker 200 is provided in the first refrigerating chamber door 10 will be described. Of course, if necessary, an ice maker may also be provided in the second refrigerating chamber door 20 or the freezing chamber door 30. At this time, the dispenser 11 and the ice maker may be provided in the same door. Alternatively, an additional ice maker may be provided in the refrigerating chamber 18 or the freezing chamber 19.

[0081] In FIG. 1B, the refrigerator 1 is exemplarily illustrated as a bottom freezer type refrigerator, but it should be noted that an idea of the present invention can be equally applied to a side-by-side type refrigerator or a top-mount type refrigerator. In a case of a side-by-side type or top-mount type refrigerator, a freezing chamber door may include an ice maker and a dispenser, or a refrigerating chamber door may include an ice maker and a dispenser.

[0082] The dispenser 11 may be positioned at a front side of the first refrigerating chamber door 10. A portion of the dispenser 11 may be recessed rearward to provide a space in which a container may be positioned.

[0083] The dispenser 11 may discharge ice generated in the ice maker 200. At least a portion of the ice maker 200 may be positioned higher than the dispenser 11.

[0084] The first refrigerating chamber door 10 may include an outer case 101. The outer case 101 may form a front exterior of the first refrigerating chamber door 10. The first refrigerating chamber door 10 may further include a door liner 102. The door liner 102 may be directly or indirectly connected to the outer case 101. The door liner 102 may open and close the refrigerating chamber 18.

[0085] In a state in which the outer case 101 and the door liner 102 are connected, an insulating space may be formed between the outer case 101 and the door liner 102. An insulator may be provided in the insulating space. The insulator may be formed by hardening a foaming agent injected from an outside. Alternatively, a vacuum insulator may be provided in the insulating space. It is also possible for the insulator and the vacuum insulator to be provided together in the insulating space.

[0086] The refrigerator 1 may include an ice making chamber 122 that provides a space where ice is generated. The ice making chamber 122 may be provided, for example, in the first refrigerating chamber door 10. The ice maker 200 may be disposed in the ice making chamber 122. For example, the door liner 102 may form the ice making chamber 122. The ice making chamber 122 may be formed as one surface of the door liner 102 is recessed toward the outer case 101.

[0087] The first refrigerating chamber door 10 may further include an ice bin 600 in which ice generated in the ice maker 200 is stored. Ice stored in the ice bin 600 may be discharged to the dispenser 11. The ice bin 600 may be received in the ice making chamber 122 together with the ice maker 200. The ice bin 600 may be disposed below the ice maker 200.

[0088] Cold generated in a cooler 110 (see FIG. 24) may be supplied to the ice making chamber 122. That is, a cooler 110 may be configured to supply cold to the ice making chamber 122. Alternatively, the cooler 110 may be a component configured to operate to supply cold to the ice making chamber 122.

[0089] The cooler 110 may be configured to cool the ice making chamber 122, including at least one of a refrigerant cycle or a thermoelectric element. For example, cold air for cooling the freezing chamber 19 may be supplied to the ice making chamber 122.

[0090] The refrigerator 1 may further include a supply passage 2a that guides cold air of the freezing chamber 19 or cold air of a space where an evaporator that generates cold air for cooling the freezing chamber 19 is disposed to the first refrigerating chamber door 10. The refrigerator 1 may include a discharge passage 2b that guides cold air discharged from the first refrigerating chamber door 10 to the freezing chamber 19 or a space where the evaporator is disposed. The supply passage 2a and the discharge passage 2b may be provided in the cabinet 2.

[0091] The first refrigerating chamber door 10 may include a cold air inlet 123a. When the first refrigerating chamber door 10 is closed, the cold air inlet 123a may be communicated with the supply passage 2a. The first refrigerating chamber door 10 may further include a cold air outlet 123b. When the first refrigerating chamber door 10 is closed, the cold air outlet 123b may be communicated with the discharge passage 2b. The cold air inlet 123a may be formed on one side of the door liner 102. Although not limited, the one side of the door liner 102 may be a side facing a wall where the supply passage 2a is disposed in the refrigerating chamber 18 when the first refrigerating chamber door 10 is closed. The cold air outlet 123b may be formed on one side of the door liner 102. Although not limited, the one side of the door liner 102 may be a side facing a wall where the discharge passage 2b is disposed in the refrigerating chamber 18 when the first refrigerating chamber door 10 is closed.

[0092] The ice maker 200 may form ice having a spherical shape. The “spherical shape” mentioned in this specification means not only a geometrically spherical shape but also a shape similar to a spherical shape.

[0093] The one side of the door liner 102 may include a first side portion 102a and a second side portion 102b having different widths in the front-back direction. A width of the second side portion 102b may be formed to be greater than a width of the first side portion 102a. At least one of the cold air inlet 123a or the cold air outlet 123b may be formed in the second side portion 102b of the door liner 102. The second side portion 102b may protrude further toward the refrigerating chamber 18 than the first side portion 102a.

[0094] The first refrigerating chamber door 10 may further include an ice making chamber door 130 that opens and closes the ice making chamber 122. The ice making chamber door 130 may be an insulated door having an insulator provided therein. The ice making chamber door 130 may be rotatably connected to the first refrigerating chamber door 10 by a hinge.

[0095] Meanwhile, a basket 136 (a first basket) capable of storing food, may be connected to the ice making chamber door 130. Of course, a basket 137 (a second basket) may also be provided on the first refrigerating chamber door 10. For example, the second basket 137 may be positioned below the first basket 136.

[0096] A component space 123 for receiving a component may be formed in the first refrigerating chamber door 10. At least one of a valve 750 for controlling the flow of water, a filter (not shown) for purifying water, or a water tank 700 for storing water may be received in the component space 123. The component space 123 may be formed by the door liner 102. The first refrigerating chamber door 10 may further include a cover member 132 that covers the component space 123. A holder 125 to which the filter is coupled may be provided in the component space 123.

[0097] The cover member 132 may include an opening 133. The filter may be coupled to the holder 125 through the opening 133. The second basket 137 may cover the opening 133. When the second basket 137 is separated, the opening 133 may be exposed. The holder 125 may be exposed to the opening 133.

[0098] FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 2A.

[0099] Referring to FIGS. 3 and 4, the dispenser 11 may include a dispenser housing 11a. The dispenser housing 11a may form a space 11b. A container such as a cup may be positioned in the space 11b. Water or ice may be discharged into the space 11b.

[0100] At least a portion of the ice making chamber 122 may overlap the component space 123 in a vertical direction. The ice maker 200 may overlap the dispenser housing 11a in a vertical direction. The ice bin 600 may overlap the dispenser housing 11a in a vertical direction. As will be described later, the ice maker 200 may include a second pusher 530. The second pusher 530 may overlap the ice bin 600 in a vertical direction. The second pusher 530 may overlap the dispenser housing 11a in a vertical direction.

[0101] The ice bin 600 may include an ice discharging portion 630 that operates to discharge stored ice. The ice discharging portion 630 may include, for example, a rotating member that rotates.

[0102] An ice chute 800 may be arranged at a lower side of the ice making chamber 122. The ice chute 800 may be opened and closed by a cap duct 820. An ice guide 840 may be positioned at a lower side of the ice chute 800. The ice chute 800 may provide a path for ice to move. The ice chute 800 may guide ice discharged from the ice bin 600 to the ice guide 840. The ice guide 840 may guide ice to the space 11b. The ice chute 800 may overlap at least a portion of the ice making chamber 122 in a vertical direction. At least a portion of the ice chute 800 may overlap the ice maker 200 in a vertical direction.

[0103] The second pusher 530 may overlap the ice chute 800 in the vertical direction. The second pusher 530 may overlap the cap duct 820 in a vertical direction. The second pusher 530 may overlap the ice guide 840 in a vertical direction.

[0104] As will be described later, the ice maker 200 may further include a first pusher 510. The second pusher 530 may be positioned closer to the outer case 101 than the first pusher 510. A horizontal distance between the second pusher 530 and a front surface of the outer case 101 may be less than a horizontal distance between a path formed by the ice chute 800 and a front surface of the outer case 101.

[0105] The first pusher 510 may overlap the ice discharging portion 630 in a vertical direction. The first pusher 510 may overlap the ice chute 800 in a vertical direction. The first pusher 510 may overlap the ice guide 840 in a vertical direction.

[0106] The ice maker 200 may overlap the water tank 700 in a vertical direction.

[0107] FIG. 5A is a drawing showing a state in which a cold air duct is connected to a door liner of the present embodiment, and FIG. 5B is a drawing showing an ice making chamber wall of a door liner of the present embodiment. FIG. 6 is a drawing showing a state in which an ice maker is installed in a supporting portion of the present embodiment. FIG. 7 is a drawing showing an arrangement relationship between an ice maker and a cold air duct of the present embodiment.

[0108] Referring to FIGS. 5 to 7, the door liner 102 may include an ice making chamber wall 140 forming the ice making chamber 122. The door liner 102 may further include a peripheral wall 102c. The peripheral wall 102c may be spaced apart from the ice making chamber wall 140 at an outer side of the ice making chamber wall 140.

[0109] The first refrigerating chamber door 10 may further include a cold air duct 900. The cold air duct 900 may guide cold air introduced through the cold air inlet 123a to the ice making chamber 122. The cold air duct 900 may guide cold air of the ice making chamber 122 to the cold air outlet 123b.

[0110] The cold air duct 900 may include a first duct 910 forming a first passage. The first passage may communicate the cold air inlet 123a with the ice making chamber 122. The cold air duct 900 may further include a second duct 920. The second duct 920 may form the first passage together with the first duct 910.

[0111] A portion of the first duct 910 may be aligned with the cold air inlet 123a. A portion of the second duct 920 may be in contact with the ice making chamber wall 140. A first through hole 140a may be formed in the ice making chamber wall 140. The first through hole 140a is a supply through hole through which cold air is supplied to the ice making chamber 122. A portion of the second duct 920 may be aligned with the first through hole 140a. One surface of the second duct 920 may form the first passage.

[0112] The cold air duct 900 may further include a third duct 930. The third duct 930 may form a second passage. The second passage may communicate the cold air outlet 123a with the ice making chamber 122. The third duct 930 may form the second passage together with the second duct 920. For example, another surface of the second duct 920 may form the second passage. A second through hole 140b may be formed in the ice making chamber wall 140. The second through hole 140b is a discharge through hole through which cold air is discharged from the ice making chamber 122. The second through hole 140b may be located below the first through hole 140a. Another portion of the second duct 920 may be aligned with the cold air outlet 123b. A portion of the third duct 930 may be aligned with the second through hole 140b.

[0113] If the ice maker 200 is provided in the freezing chamber door 30, the cold air duct 900 may be omitted.

[0114] The ice making chamber wall 140 may include a front wall 141. The front wall 141 may be a wall facing the outer case 101. The ice making chamber wall 140 may further include a first side wall 143. The ice making chamber wall 140 may further include a second side wall 144 positioned opposite the first side wall 143. The cold air duct 900 may be positioned between the second side wall 144 and the peripheral wall 102c. The first through hole 140a and the second through hole 140b may be formed in the second side wall 144. The ice making chamber wall 140 may further include an upper wall 142. The ice making chamber wall 140 may further include a lower wall 148.

[0115] The first refrigerating chamber door 10 may further include a supporting portion 150 on which the ice maker 200 is installed. The supporting portion 150 may be installed on the ice making chamber wall 140. As another example, a portion or all of the supporting portion 150 may be integrally formed with the ice making chamber wall 140. Alternatively, the supporting portion 150 may be omitted and the ice maker 200 may be installed on the ice making chamber wall 140. In either case, the ice maker 200 may be described as being supported on the ice making chamber wall 140.

[0116] The supporting portion 150 may include a first member 152. The first member 152 may extend in a vertical direction. The ice maker 200 may be installed on the first member 152. The first member 152 may include a mounting portion 155. The mounting portion 155 may be disposed at an upper portion of the first member 152. For example, the first member 152 may be provided with a slot 154 through which a portion of the ice maker 200 passes. A motor assembly for driving an ice discharging portion 630 of the ice bin 600 may be mounted on the first member 152.

[0117] The supporting portion 150 may further include a second member 153. The second member 153 may extend in a horizontal direction from the first member 152. The ice bin 600 may be seated on the second member 153. An ice through hole 153a through which ice passes may be formed in the second member 153.

[0118] The ice maker 200 may further include a bracket 220 supported by the supporting portion 150 or supported by the ice making chamber wall 140. When the ice maker 200 is directly supported by the ice making chamber wall 140, the ice maker 200 may be supported by the front wall 141.

[0119] FIG. 8A is a perspective view of an ice maker as viewed from one upper side according to the present embodiment, and FIG. 8B is a perspective view of an ice maker as viewed from another upper side according to the present embodiment. FIG. 9A is a front view of an ice maker of the present embodiment, and FIG. 9B is a perspective view of an ice maker as viewed from a lower side according to the present embodiment. FIG. 10 is an exploded perspective view of an ice maker according to the present embodiment. FIG. 11 is an exploded front view of an ice maker according to the present embodiment.

[0120] Referring to FIGS. 4 to 11, the ice maker 200 may include a first tray assembly 201. The first tray assembly 201 may form a portion of an ice making cell 203. The ice maker 200 may further include a second tray assembly 202. The second tray assembly 202 may form another portion of the ice making cell 203. The ice making cell 203 is a space where water is phase-changed by cold.

[0121] A driver 480 may be mounted on one side of the bracket 220. The driver 480 may provide driving force to the second tray assembly 202. The first tray assembly 201 may be installed on the bracket 220. The second tray assembly 202 may move relative to the first tray assembly 201. For example, the second tray assembly 202 may move linearly, curvedly, or rotationally.

[0122] The driver 480 may include a motor housing 481. The driver 480 may further include a motor received in the motor housing 481 and a power transfer portion. A coupling portion 482 may be formed at an upper side of the motor housing 481. The coupling portion 482 may be coupled to the bracket 220 by a coupling member. The driver 480 may be positioned adjacent to the first side wall 143. That is, the driver 480 may be positioned opposite a first through hole (inlet through hole) 140a through which cold air is introduced.

[0123] The ice maker 200 may further include a full ice detection lever 550 for detecting a full ice of the ice bin 600. One end of the full ice detection lever 550 may be connected to the driver 480. Another end of the full ice detection lever 550 may be connected to the bracket 220.

[0124] The ice making chamber wall 140 may be provided with a recess formed at a position corresponding to the driver 480. The recess may include a first recess 145a formed in the first side wall 143. The recess may further include a second recess 145b formed in the front wall 141.

[0125] The ice making chamber wall 140 may further include a third recess 145c in which a portion of the supporting portion 150 is positioned. The third recess 145c may be formed in the front wall 141. The third recess 145c may be connected to the second recess 145b.

[0126] The ice maker 200 may further include a cold guide. The cold guide may provide a path for supplying cold to the ice making cell 203. The cold guide may be provided outside the ice making cell 203. Hereinafter, an example in which the cold is cold air will be described. The cold guide may include, for example, a cold air guide 270. Accordingly, all configurations described in the cold air guide may be understood as configurations of the cold guide. In the present specification, a path for supplying cold to the ice making cell 203 may be formed by the cold air guide, the first tray, and the first tray cover. Accordingly, at least a portion of each of the cold guide, the first tray and the first tray cover may serve as the cold guide.

[0127] The cold air guide 270 may be adjacent to or in contact with the second side wall 144. The cold air guide 270 may be a separate component from the first tray case described below or may be a portion of the first tray case.

[0128] The driver 480 may be located at an opposite side of the second side wall 144 or the cold air guide 270 with respect to the ice maker 200. The ice making chamber wall 140 may have slots 146, 147 formed therein through which a water pipe through which water flows and one or more connectors (or wire) for connection with the ice maker 200 pass. The slots 146, 147 may be formed in the front wall 141.

[0129] A portion of water may be phase-changed into ice while being received in a portion of the ice making cell 203 formed by the first tray assembly 201. Another portion of water may be phase-changed into ice while being received in a portion of the ice making cell 203 formed by the second tray assembly 202. In a state in which an ice making is completed, a portion of ice may be in contact with the first tray assembly 201. In a state in which an ice making is completed, another portion of ice may be in contact with the second tray assembly 202.

[0130] The first tray assembly 201 may include a first tray 320. The first tray 320 may form a portion of each of a plurality of ice making cells 203.

[0131] At least a portion of the first tray 320 may be formed of a metal material to facilitate a transfer of cold air. The first tray assembly 201 may include a first tray case. The first tray case may include a portion that is in contact with the first tray 320 or that is supported by the first tray 320.

[0132] The first tray case may further include a first tray cover 300. The first tray cover 300 may be coupled to the first tray 320. The first tray cover 300 may be disposed at one side of the first tray 320.

[0133] The first tray 320 may be coupled to the bracket 220. For example, the first tray 320 may be coupled to the bracket 220 in a state in which the first tray cover 300 is coupled to one side of the first tray 320. Alternatively, when the bracket 220 is omitted, the first tray 320 may be coupled to the supporting portion 150 or the ice making chamber wall 140.

[0134] The ice maker 200 may further include a heater 330 to provide heat to the ice making cell 203. For example, the first tray assembly 201 may include the heater 330.

[0135] The heater 330 may operate at least in an ice separation process to provide heat to the first tray 320 after an ice making is completed. The heater 330 may function as an ice separation heater. The heater 330 may be in contact with the first tray 320.

[0136] The first tray assembly 201 may further include a heater case 340 (or a heater cover).

[0137] The heater case 340 may include a portion in contact with the heater 330 or supported by the heater 330. The heater case 340 may be a separate component from the first tray cover 300 or may be integrally formed with the first tray cover 300.

[0138] The heater case 340 may press the heater 330 toward the first tray 320. The heater case 340 may be positioned between the first tray 320 and the first tray cover 300. For example, the heater case 340 may be positioned at an upper side of a portion of the first tray 320 and at a lower side of a portion of the first tray cover 300.

[0139] The second tray assembly 202 may include a second tray 360. The second tray 360 may form another portion of each of a plurality of ice making cells 203.

[0140] At least a portion of the second tray 360 may be formed of a deformable material so that ice may be easily separated.

[0141] The second tray assembly 202 may further include a second tray case. The second tray case may include a portion in contact with or to support the second tray 360.

[0142] The second tray case may include a second tray cover 350. A portion of the second tray cover 350 may be positioned closer to the first tray 320 than a portion of the second tray 360. The second tray case may further include a second tray supporter 380. A portion of the second tray supporter 380 may be positioned farther way from the first tray 320 than a portion of the second tray 360.

[0143] The ice maker 200 may further include a water supply 240 for supplying water to the ice making cell. The water supply 240 may supply water to some of a plurality of ice making cells. The water supply 240 may be installed on the bracket 220. The water supply 240 may be provided with a slot 242 through which a water pipe passes. The water supply 240 may include a through hole 241 through which water is discharged.

[0144] The cold air guide 270 may be installed on, for example, the bracket 220, the first tray 320, or the first tray cover 300. The cold air guide 270 may guide cold air to the ice making cell 203. The cold air guide 270 may be in contact with the first tray assembly 201. The cold guide 270 may be in contact with one or more of the first tray 320 and the first tray cover 300.

[0145] A portion of the cold air guide 270 may be positioned at an opposite side of the driver 480 with respect to the first tray assembly 201. Cold air guided by the cold air guide 270 may flow in a direction close to the driver 480. The driver 480 may be prevented from acting as a flow resistance of cold air by an arrangement of the driver 480.

[0146] The ice maker 200 may further include a temperature sensor 710 for detecting a temperature of water or ice in an ice making cell. For example, the temperature sensor 710 may detect a temperature of the first tray 320. The temperature sensor 710 may be seated on the first tray 320. The temperature sensor 710 may be covered by an insulator 720. The insulator 720 may prevent cold air from directly contacting the temperature sensor 710.

[0147] The ice maker 200 may further include a transfer portion 420, 421 for transmitting a power of the driver 480. For example, a power of the driver 480 may be transmitted to the second tray assembly 202 by a plurality of transfer portions 420, 421. A first transfer portion 420 of a plurality of transfer portions 420, 421 may be connected to the driver 480. The first transfer portion 420 may be coupled to one side of the second tray supporter 380. A second transfer portion 421 of a plurality of transfer portions 420, 421 may be coupled to another side of the second tray supporter 380.

[0148] The ice maker 200 may further include a shaft 410 coupled to each of the plurality of transfer portions 420 and 421. The first transfer portion 420 may be movably supported by one side of the first tray 320. The second transfer portion 421 may be movably supported by another side of the first tray 320.

[0149] A material of the transfer portions 420, 421 is different from a material of the first tray 320. The transfer portions 420, 421 may be, for example, a plastic injection molded product. To prevent direct friction between two components having different materials, an intermediate member 416 may be coupled to one of the transfer portions 420, 421 and the first tray 320. For example, the intermediate member 416 may be coupled to the first tray 320. The transfer portions 420, 421 may pass through the intermediate member 416 and be in contact with the intermediate member 416.

[0150] The ice maker 200 may further include a first pusher 510 to press ice or a first tray assembly 201 in an ice separation process. The first pusher 510 may push ice so that ice is separated from the first tray 320. The first pusher 510 may pass through the first tray cover 300 to push ice, for example. The first pusher 510 may push ice by passing through the first tray 320.

[0151] The first pusher 510 may receive a power from the driver 480. For example, the first pusher 510 may receive a power from the driver 480 transmitted to the second tray assembly 202.

[0152] The ice maker 200 may further include a pusher link 440. For example, a plurality of pusher links 440 may be connected to the first pusher 510. One side of the pusher link 440 may be connected to the first pusher 510, and another side of the pusher link 440 may be connected to the second tray assembly 202. For example, the other side of the pusher link 440 may be connected to the second tray supporter 380.

[0153] The ice maker 200 may further include an elastic member 460. One end of the elastic member 460 may be connected to the transfer portion 420, 421, and another end of the elastic member 460 may be connected to the second tray assembly 202. When the elastic member 460 is tensioned, a position of the transfer portions 420 and 421 may be moved to an initial position by a restoring force. The elastic member 460 may increase an adhesion force between the first tray assembly 201 and the second tray assembly 202 at an ice making position. The other end of the elastic member 460 may be coupled to the second tray supporter 380.

[0154] The ice maker 200 may further include a second pusher 530 to press ice or the second tray assembly 202 in an ice separation process. The second pusher 530 may be installed on the bracket 220, for example. If the bracket 220 is omitted, the second pusher 530 may be installed on the supporting portion 150 or the ice making chamber wall 140.

[0155] The ice maker 200 may further include a full ice detection lever 550. The full ice detection lever 550 may include a lever body 552 extending in one direction. The full ice detection lever 550 may further include a first extension 553 extending from one end of the lever body 552. The full ice detection lever 550 may further include a second extension 554 extending from another end of the lever body 552. The first extension 553 may be connected to the driver 480. The second extension 554 may be connected to the bracket 220.

[0156] The driver 480 may include an extension rib 484 for insertion into or passing through the bracket 220. For example, a plurality of extension ribs 484 may be arranged to be spaced apart from each other in a horizontal or vertical direction. For example, the extension ribs 484 may protrude from the motor housing 481.

[0157] FIG. 12A is a perspective view of a first tray as viewed from an upper side according to the present embodiment. FIG. 12B is a perspective view of a first tray as viewed from a lower side according to the present embodiment. FIG. 13 is a bottom view of a first tray according to the present embodiment.

[0158] Referring to FIGS. 12 and 13, the first tray 320 may define a first cell 321, which is a portion of the ice making cell 203. The first tray 320 may include a first cell wall 322 to form the first cell 321. The first cell 321 may be formed in a hemispherical shape or a shape similar to a hemisphere, for example.

[0159] The first tray 320 may include a first contact surface 322a in contact with the second tray 360. The first contact surface 322a may be one surface of the first cell wall 322.

[0160] The first tray 320 may form, for example, a plurality of first cells 321. A plurality of first cells 321 may be arranged in a plurality of rows so as to reduce a size of generated ice while increasing a number of ices. The plurality of first cells 321 may include a first cell portion 321a arranged in a first row and a second cell portion 321b arranged in a second row.

[0161] The first cell portion 321a may form a portion of a first ice making cell of the first row, and the second cell portion 321b may form a portion of a second ice making cell of the second row. The first row and the second row may be arranged in a Y-axis direction in the drawing. The Y-axis direction may be, for example, a front-back direction of a refrigerator or a front-back direction of a door.

[0162] The first row may include a plurality of first cell portions 321a. The second row may include a plurality of second cell portions 321b.

[0163] The first row may be positioned closer to the front wall 141 or an outer case 101 or a front surface of the door or a cold air guide 270 than the second row. The second row may be positioned closer to the ice making chamber door 130 than the first row.

[0164] A number of the plurality of first cell portions 321a may be the same as or different from a number of the plurality of second cell portions 321b. As an example, FIG. 13 illustrates that a number of the plurality of first cell portions 321a is less than a number of the plurality of second cell portions 321b.

[0165] One first cell portion 321a may be arranged to correspond to an area between two adjacent second cell portions 321b. Alternatively, one first cell portion 321a may be arranged to face an area between two adjacent second cell portions 321b. The first cell portion 321a and the second cell portion 321b may be arranged in a zigzag arrangement or a staggered arrangement.

[0166] One ice making cell of the first row (a first cell portion) may overlap with two ice making cells of the second row (a second cell portion) adjacent to the one ice making cell in a Y-axis direction.

[0167] The first tray 320 may further include through holes 323a, 323a1, 323b that provide a path for water or cold air. The through holes 323a, 323a1, 323b may be provided in the same number as a number of the plurality of first cells 321.

[0168] The first tray 320 may further include an auxiliary storage chamber 323d. The auxiliary storage chamber 323d may allow water or cold air to pass through. The auxiliary storage chamber 323d may be disposed at an upper side of the through holes 323a, 323a1, 323b. The first tray 320 may further include an extension wall 323c. The extension wall 323c may extend upward from a periphery of the through holes 323a, 323a1, 323b to form the auxiliary storage chamber 323d. The extension wall 323c may extend from the first cell wall 322.

[0169] The auxiliary storage chamber 323d may be a space where ice is generated. Alternatively, the auxiliary storage chamber 323d may be a portion of an ice making cell 203. When an ice making is completed, an upper end of ice may be located in the through hole 323a, 323b or adjacent to the through hole 323a, 323b. Accordingly, generated ice may have a spherical shape or a shape that is almost spherical.

[0170] The auxiliary storage chamber 323d may store water supplied in excess to the ice making cell 203. The auxiliary storage chamber 323d may store ice that expands in a process of supplied water being phase-changed.

[0171] The through holes 323a, 323a1, 323b may include a water supply through hole 323a1. The water supply through hole 323a1 may allow water flowing through the water supply 240 to pass through. The water supply through hole 323a1 may be arranged in the first row. A size of the water supply through hole 323a1 may be greater than a size of each of other through holes 323a, 323b.

[0172] The first tray 320 may further include an extension 324. The extension 324 may include a portion extending from the first cell wall 322. The extension 324 may be in contact with a portion of the cold air guide 270 or may support the cold air guide 270.

[0173] The extension 324 may include a portion spaced apart from the cold air guide 270. Cold air may flow through a space between the extension 324 and the cold air guide 270.

[0174] The extension portion 324 may include a first extension wall 324e. The extension 324 may further include a second extension wall 324d. The second extension wall 324d may extend in a direction crossing the first extension wall 324e. The first and second extension walls 324d, 324e may be in contact with the guide wall or be spaced apart from the guide wall at the corner portion.

[0175] The first tray 320 may further include one or more coupling parts to be coupled to the bracket 220. For example, the first tray 320 may include a first coupling part 324a. The first tray 320 may further include a second coupling part 324b. When the bracket 220 is omitted, the first and second coupling parts 324a, 324b may be in contact with or be supported by the ice making chamber wall 140.

[0176] The extension 324 may further include the first and second coupling parts 324a, 324b. For example, the first and second coupling parts 324a, 324b may extend from one end of the first extension wall 324e in a direction away from the second tray 360. The first and second coupling parts 324a, 324b may be arranged spaced apart from each other in an X-axis direction (a direction crossing a Y-axis, for example, a horizontal direction). The first and second coupling parts 324a, 324b may include a coupling hole 324c.

[0177] The first tray 320 may further include a supporter 325 that supports a component for a movement of the second tray assembly 202. For example, a plurality of supporters 325 may be arranged spaced apart from each other in an X-axis direction. The supporter 325 may extend in one direction from the extension 324.

[0178] The supporter 325 may include a hole 325a. For example, the transfer portions 420 and 421 may be movably coupled to the supporter 325. For example, the transfer portions 420 and 421 may be rotatably coupled to the supporter 325. The intermediate member 416 may be coupled to the hole 325a of the supporter 325, and a slot 325b into which a portion of the intermediate member 416 is inserted may be provided in the supporter 325 to prevent the intermediate member 416 from rotating with respect to the supporter 325. The slot 325b may extend outwardly from the hole 325a.

[0179] The intermediate member 416 may be formed of a different material than the first tray 320. An entirety of the first tray 320 may be formed of the same material, or at least a portion of the first tray 320 may be formed of a metal material.

[0180] A plurality of supporters 325 may be arranged spaced apart from the first tray 320. A distance W1 between the plurality of supporters 325 may be less than a distance W2 (e.g., a maximum distance) between two ice making cells disposed at both sides of the plurality of ice making cells in the second row.

[0181] The first tray 320 may further include a bracket coupling portion 325c to be coupled to the bracket 220. The bracket coupling portion 325c may protrude from the extension 324. The bracket coupling portion 325c may be positioned between a plurality of supports 325.

[0182] The first tray 320 may further include a cover coupling portion 327 to be coupled to the first tray cover 300. For example, a plurality of cover coupling portions 327 may be arranged to be spaced apart from each other in a left-right direction or a front-back direction. For example, the cover coupling portion 327 may protrude from the extension 324.

[0183] The first tray 320 may further include a sensor mounting portion 326 on which the temperature sensor 710 is mounted. The sensor mounting portion 326 may be formed in a recessed shape toward the second tray 360. The temperature sensor 710 may be received in the sensor mounting portion 326.

[0184] A portion of the sensor mounting portion 326 may be positioned between two adjacent first cell portions 321a. Another portion of the sensor mounting portion 326 may be positioned between two adjacent second cell portions 321b. That is, the temperature sensor 710 may include a portion positioned between two adjacent ice making cells in the first row. The temperature sensor 710 may include a portion positioned between two adjacent ice making cells in the second row.

[0185] The sensor mounting portion 326 may be arranged to be inclined with respect to an arrangement direction of a plurality of first cell portions 321a. The sensor mounting portion 326 may be arranged to be inclined with respect to an arrangement direction of a plurality of second cell portions 321b.

[0186] The first tray 320 may further include a receiving portion 326a for receiving an insulator 720 seated on the temperature sensor 710.

[0187] The first tray 320 may further include a plurality of coupling bosses 328a, 328b, 328c. The plurality of coupling bosses 328a, 328b, 328c may include a first coupling boss 328a. The heater case 340 may be seated on the first coupling boss 328a. The first coupling boss 328a may be coupled to a coupling member passing through the first tray cover 300 and the heater case 340.

[0188] The plurality of coupling bosses 328a, 328b, 328c may further include a second coupling boss 328b. The first tray cover 300 may be seated on the second coupling boss 328b. The second coupling boss 328b may be coupled to a coupling member that is coupled to the first tray cover 300.

[0189] The plurality of coupling bosses 328a, 328b, 328c may further include a third coupling boss 328c. The third coupling boss 328c may be coupled to a coupling member passing through the first tray cover 300.

[0190] The first tray 320 may further include a heater seating portion 329 on which the heater 330 is seated. The heater seating portion 329 may be formed, for example, by a portion of the first tray 320 being recessed in a direction toward the second tray 360.

[0191] The first tray 320 may further include a guide groove 329a for guiding a portion of the heater 330 disposed outside the heater seating portion 329.

[0192] The first tray 320 may further include a recess 329c recessed in a direction toward the second tray 360 from the extension 324 or the first cell wall 322. The heater seating portion 329 may be formed by being recessed in the recess 329c. Of course, the recess 329c may be omitted.

[0193] FIG. 14A is a perspective view of a first tray cover as viewed from an upper side according to the present embodiment. FIG. 14B is a perspective view of a first tray cover as viewed from a lower side according to the present embodiment.

[0194] Referring to FIG. 14, the first tray cover 300 may include a first portion 301. At least a portion of the first portion 301 may be spaced apart from the first tray 320. For example, at least a portion of the first portion 301 may be positioned at an upper side of the first tray 320. Cold air may flow between the first portion 301 and the first tray 320.

[0195] The first tray cover 300 may further include a second portion 302 extending from one side of the first portion 301. The second portion 302 may extend from the first portion 301 in a direction crossing the first portion 301. For example, the second portion 302 may extend from the first portion 301 in a direction away from the first tray 320.

[0196] The second portion 302 may cover the first pusher 510 at an ice making position. The second portion 302 may minimize an exposure of the first pusher 510. The second portion 302 may be positioned between the first pusher 510 and the ice making chamber door 130. A hole 302a may be formed in the second portion 302. A coupling member may pass through the hole 302a.

[0197] The first tray cover 300 may further include a guide 303. The guide 303 may extend from the first portion 301 and provide a movement path of the first pusher 510. The guide 303 may extend in a direction crossing the first portion 301 from the first portion 301. The guide 303 may include a guide slot 303a.

[0198] The first tray cover 300 may further include a water supply hole 301a. The water supply hole 301a may be aligned with a through hole 241 of the water supply 240. The water supply hole 301a may be aligned with a water supply through hole 323a1.

[0199] The first tray cover 300 may further include a communication hole 301b aligned with the auxiliary storage chamber 323d (or a through hole 323a, 323a1, 323b) of the first tray 320. For example, a plurality of communication holes 301b may be formed in the first portion 301.

[0200] The first tray cover 300 may further include a first coupling hole 301d aligned with the first coupling boss 328a. A coupling member may be coupled to the first coupling boss 328a by passing through the first coupling hole 301d and the heater case 340.

[0201] The first tray cover 300 may further include a coupling portion 301e aligned with the second coupling boss 328b. The coupling portion 301e may protrude from the first portion 301. A coupling member may be coupled to the second coupling boss 328b by passing through the coupling portion 301e.

[0202] The first tray cover 300 may further include a second coupling hole 301f aligned with the third coupling boss 328c. A coupling member may be coupled to the third coupling boss 328c by passing through the second coupling hole 301f.

[0203] The first portion 301 may further include a receiving groove 301g in which an extension wall 323c of the first tray 320 is received. A rib 301c may be formed in a portion of the receiving groove 301g corresponding to the communication hole 301b.

[0204] The first tray cover 300 may further include a guide cover 304 in contact with a portion of the cold air guide 270. The guide cover 304 may cover a portion of the cold air guide 270. The guide cover 304 may be bent at the first portion 301.

[0205] The first tray cover 300 may further include a guide contact portion 304a in contact with the cold air guide 270. The guide contact portion 304a may extend upward from the first portion 301.

[0206] The first tray cover 300 may further include a tray seating portion 305 seated on the first tray 320. For example, a plurality of tray seating portions 305 may be arranged to be spaced apart from the first portion 301. The tray seating portion 305 may extend downward from both ends of the first portion 301. The first portion 301 may be spaced apart from a portion of the first tray 320 by the tray seating portion 305.

[0207] The first tray cover 300 may further include a tray coupling portion 306 to be coupled to the first tray 320. The cover coupling portion 327 may be coupled to the tray coupling portion 306. For example, the cover coupling portion 327 may be inserted into the tray coupling portion 306.

[0208] The first tray cover 300 may further include a case contact portion 307. The case contact portion 307 may protrude from the first portion 301. The case contact portion 307 may be in contact with the heater case 340. The case contact portion 307 may press the heater case 340. For example, a plurality of case contact portions 307 may be arranged to be spaced apart in a front-back direction and a left-right direction.

[0209] The first tray cover 300 may further include a pressing protrusion 308. The pressing protrusion 380 may press the insulator 720. For example, a plurality of pressing protrusions 308 may protrude from the first portion 301.

[0210] The first tray cover 300 may further include a heater guide 309. The heater guide 309 may be positioned adjacent to one tray seating portion of a plurality of tray seating portions 305. The heater guide 309 may protrude from the first portion 301. A portion of the heater 330 may be positioned between the heater guide 309 and the one tray seating portion 305.

[0211] FIG. 15A is a perspective view of a second tray assembly as viewed from an upper side according to the present embodiment. FIG. 15B is a perspective view of a second tray assembly as viewed from a lower side according to the present embodiment.

[0212] Referring to FIG. 15, the second tray 360 may define a second cell 361, which is another portion of the ice making cell. The second tray 360 may include a second cell wall 362 forming the second cell 361. The second tray 360 may form, for example, a plurality of second cells 361. A plurality of second cells 361 may be arranged in a plurality of rows so as to reduce a size of generated ice while increasing a number of generated ices.

[0213] A plurality of second cells 361 may include a first cell portion 361a arranged in a first row and a second cell portion 361b arranged in a second row. The first cell portion 361a may form another portion of a first ice making cell of the first row, and the second cell portion 361b may form another portion of a second ice making cell of the second row.

[0214] The first row and the second row may be arranged in a Y-axis direction in the drawing. The Y-axis direction may be, for example, a front-back direction of a refrigerator or a front-back direction of a door. The first row may include a plurality of first cell portions 361a. The second row may include a plurality of second cell portions 361b.

[0215] The first row may be positioned closer to the front wall 141 or an outer case 101 or a front surface of the door or a cold air guide 270 than the second row. The second row may be positioned closer to the ice making chamber door 130 than the first row. One ice making cell of the first row may overlap two ice making cells of the second row adjacent to the one ice making cell in a Y-axis direction. Since the second cell 361 of the second tray 360 may be arranged to correspond to the first cell 321 of the first tray 320, a description of a specific arrangement of the second cell 361 will be omitted.

[0216] The second tray 360 may be seated on the second tray supporter 380. When the second tray 360 is seated on the second tray supporter 380, a portion of the second tray 360 may pass through the second tray supporter 380.

[0217] In a state in which the second tray 360 is seated on the second tray supporter 380, the second tray cover 350 may be seated on the second tray 360. A portion of the second tray 360 may pass through the second tray cover 350.

[0218] The second tray supporter 380, the second tray 360, and the second tray cover 350 may be coupled at once by a coupling member S4. The coupling member S4 may be coupled, for example, at a side of the second tray supporter 380.

[0219] The second tray assembly 202 may further include a fixing portion 390 (or connection portion).

[0220] Although not limited, when the second tray assembly 202 is divided into three regions in an X-axis direction (left and right direction), the fixing portion 390 may be positioned in a region located in a center portion.

[0221] During an ice separation process, a pressing force of the second pusher 530 may be applied to the second tray 360 having a plurality of second cells. The fixing portion 390 may reduce a phenomenon in which the second tray 360 having the second cells arranged in a plurality of rows is not restored to an original shape after an ice separation process is completed.

[0222] The fixing portion 390 may be seated on the second tray 360. In a state in which the fixing portion 390 is seated on the second tray 360, a portion of the fixing portion 390 may pass through the second tray 360.

[0223] The fixing portion 390 passing through the second tray 360 may be in contact with the second tray supporter 380 or may pass through the second tray supporter 380.

[0224] The second tray supporter 380, the second tray 360, and the fixing portion 390 may be coupled at once by a coupling member S5. The coupling member S5 may be coupled, for example, at a lower side of the second tray supporter 380.

[0225] In a state in which the second tray cover 350 is seated on the second tray 360, one end (for example, an upper end) of the second tray 360 may be positioned farther from the second tray supporter 380 than one end (for example, an upper end) of the second tray cover 350. For example, an upper end of the second tray 360 may be positioned higher than an upper end of the second tray cover 350.

[0226] FIG. 16A is a perspective view of a second tray as viewed from one side according to the present embodiment, and FIG. 16B is a perspective view of a second tray as viewed from another side according to the present embodiment. FIG. 17 is a perspective view of a second tray as viewed from a lower side according to the present embodiment. FIG. 18 is a bottom view of a second tray according to the present embodiment.

[0227] Referring to FIGS. 16 to 18, the second tray 360 may define a second cell 361, which is another portion of the ice making cell. The second tray 360 may include a second cell wall 362 forming the second cell 361. The second cell 361 may be formed, for example, in a hemispherical shape or a shape similar to a hemisphere.

[0228] A first cell portion 361a may be positioned to correspond to an area between two adjacent second cell portions 361b or to face an area between two adjacent second cell portions 361b. That is, the first cell portion 361a and the second cell portion 361b may be arranged in a zigzag arrangement or a staggered arrangement.

[0229] The second tray 360 may further include a pusher contact portion 362a in contact with the second pusher 530 during an ice separation process. The pusher contact portion 362a may be formed on the second cell wall 362. A thickness of the second cell wall 362 in a circumferential direction may be different from a thickness of the pusher contact portion 362a. A thickness of the pusher contact portion 362a may be greater than a thickness of the second cell wall 362. The pusher contact portion 362a may include a flat surface.

[0230] The second tray 360 may further include a peripheral wall 365. The peripheral wall 365 may extend from the second cell wall 362 toward the first tray 320. The peripheral wall 365 may surround the first cell wall 322.

[0231] The peripheral wall 365 may include a curved wall 365a. The curved wall 365a may be positioned adjacent to the first cell portion 361a. The peripheral wall 365 may further include a straight wall 365b. The straight wall 365b may, for example, be parallel to a Z-axis. The straight wall 365b may be positioned adjacent to the second cell portion 361b.

[0232] The peripheral wall 365 may further include a connecting wall 365c connecting the straight wall (365b) and the curved wall 365a. The connecting wall 365c may be rounded in a Z-axis direction. A curvature of the curved wall 365b may be different from a curvature of the connecting wall 365c. A curvature of the curved wall 365b may be greater than a curvature of the connecting wall 365c. The cover body 351 may surround an outer surface of the peripheral wall 365.

[0233] The second tray 360 may further include an extension 367. The extension 367 may extend from the second cell wall 362 or the peripheral wall 365. Alternatively, the extension 367 may extend from a boundary portion between the second cell wall 362 and the peripheral wall 365. The extension 367 may extend in a direction crossing the peripheral wall 365.

[0234] The second tray cover 350 may be seated on one surface of the extension 367. Another surface of the extension 367 may be seated on the second tray supporter 380.

[0235] The first protrusion 368a may be formed on one surface of the extension 367. The second protrusion 368 may be formed on another surface of the extension 367.

[0236] The first protrusion 368a may be bent one or more times in a horizontal direction. For example, the first protrusion 368a may include a first part and a second part inclined from the first part. The first protrusion 368a may be formed in a shape such as a “V”, for example.

[0237] The second protrusion 368 may be bent one or more times in a horizontal direction. For example, the second protrusion 368 may include a first part and a second part inclined from the first part. The second protrusion 368 may be formed in a shape such as a “V”, for example.

[0238] A third protrusion 369 may be provided on another surface of the extension 367 to be coupled to the second tray supporter 380. The third protrusion 369 may overlap the curved wall 365a in a Z-axis direction, for example.

[0239] The second protrusion 368 may be positioned closer to the straight wall 365b than the curved wall 365a. The first protrusion 368a may be positioned closer to the second cell portion 361b. The second protrusion 368 may be positioned closer to the second cell portion 361b. The third protrusion 369 may be positioned closer to the first cell portion 361a.

[0240] The extension 367 may be provided with a plurality of holes 367a through which the coupling protrusions 353, 353a pass. A portion of the extension 367 where the coupling protrusions 353, 353a are formed (referred to as a “fixed end”) is fixed to the second tray cover 350 and the second tray supporter 380. When the second pusher 530 presses the second tray 360, walls forming each of the second cells 361 must be independently deformed so that ice can be easily separated from the second cells 361.

[0241] However, since a distance between each of the plurality of second cells 361 and the fixed end is different, a wall of a portion disposed far from the fixed end may not be deformed independently, but may simply move together with ice while maintaining its original shape or with a small amount of deformation. In this case, ice may not be separated from the second cell 361. For example, when the second tray 360 is divided into three regions in left and right directions, an separation performance may be degraded in a central region.

[0242] In a case of this present invention, in order to improve an ice separation performance, the fixing portion 390 may fix a central region of the second tray 320. Since the fixing portion 390 functions as the fixing end, some of the second cells are positioned adjacent to the fixing portion 390, so that walls of the second cells positioned adjacent to the fixing portion can be independently deformed during an ice separation process, so that an ice separation performance can be improved.

[0243] The second tray 360 may further include a fixing groove 364 in which the fixing portion 390 is received. A portion of the fixing groove 364 may be positioned between two adjacent first cell portions 361a. Another portion of the fixing groove 364 may be positioned between two adjacent second cell portions 361b.

[0244] The second tray 360 may further include a protruding wall 364a extending from a portion corresponding to the fixing groove 364. The fixing portion 390 may pass through the fixing groove 364 and be positioned within the protruding wall 364a.

[0245] The fixed portion 390 may be configured to allow the second cell wall 362 and the second tray supporter 380 to be coupled within a space formed by the peripheral wall 365.

[0246] Meanwhile, in order to increase an ice making amount in a predetermined area in an ice maker in the present embodiment, following features may be included. In FIG. 18, a predetermined area of the second tray is described as an example, but it is not only applicable to the second tray, but can also be equally applied to the first tray, the first tray assembly, or the second tray assembly.

[0247] Referring to FIG. 18, ice making cells may be arranged in two or more rows within a predetermined area. A predetermined area may be determined by W, which is a length in an X-axis direction, and L, which is a length in a Y-axis direction. The predetermined area may be an area within a rectangle or an area within a square. Of course, the predetermined area may be an area formed by a polygon or various shapes.

[0248] In this embodiment, the predetermined area will be described as an area within a horizontal border of the second tray 360 or an area of the extension 367.

[0249] First, when a plurality of rows of ice making cells are arranged within a predetermined area, a number of ice making cells when the ice making cells are arranged in a zigzag arrangement or staggered arrangement may be less than a number of ice making cells when the ice making cells are arranged in-line.

[0250] In the present specification, in a case of a zigzag arrangement or staggered arrangement, a number of ice making cells in a first row may be less than a number of ice making cells in a second row.

[0251] The in-line arrangement may mean a case in which a number of ice making cells in each row is the same, and the ice making cells are arranged so that a center of each of icemaking cells in the first row coincides with a center of each of ice making cells in the second row in a Y-axis direction.

[0252] In addition, a zigzag arrangement or a staggered arrangement may be referred to as a first pattern arrangement. An in-line arrangement may be referred to as a second pattern arrangement. A sum of volumes of a plurality of ice making cells in the first pattern arrangement may be greater than a sum of volumes of a plurality of ice making cells in the second pattern arrangement. In terms of increasing an ice making amount, the first pattern arrangement may be preferable.

[0253] Meanwhile, the ice making cells may be arranged in even rows or odd rows within a predetermined area. In FIG. 18, the ice making cells are arranged in even rows, but it is to be noted that the ice making cells may also be arranged in odd rows. When the ice making cells are arranged in odd rows, a plurality of ice making cells may be arranged in the first to third rows. Of course, it is also possible for the ice making cells to be arranged in five or more rows.[a Case in which Ice Making Cells are Arranged in Even Rows]

[0254] In FIG. 18, a distance from a first end of a second tray to an ice making cell of a first row may be referred to as A, and a diameter of each of the ice making cells of the first and second rows may be referred to as D. An overlapping width (distance) in an X-axis direction between the ice-making cells of the first row and the ice-making cells of the second row can be referred to as B. An overlapping width (distance) in the X-axis direction between an ice making cell of a first row and an ice making cell of a second row may be referred to as B. A distance from a second end of the second tray to an ice making cell of a second row may be referred to as C. The first end and the second end may be spaced apart in a Y-axis direction.

[0255] In this case, L (mm)=A+C+(D×2n)−(B×(2n−1)). n is an integer greater than or equal to 1. B may be less than C and A. D may be greater than A and C.

[0256] In order to maintain an ice making amount within a set range, a diameter of an ice making cell may satisfy the following condition 1.L×20 / 76≤D⁢(mm)≤L×27 / 76

[0257] Unlike FIG. 18, if an ice making cell of a first row and an ice making cell of a second row are spaced apart in a Y-axis direction, a distance between the ice making cell of the first row and the ice making cell of the second row may be referred to as B.

[0258] In this case, L (mm)=A+C+(D×2n)+(B×(2n−1)). n is an integer greater than or equal to 1. In this case, a diameter of an ice making cell may satisfy the condition 1.[a Case in which Ice Making Cells are Arranged in Odd Rows]

[0259] As shown in FIG. 18, a distance from a first end of a second tray to an ice making cell of a first row may be referred to as A, and a diameter of each of ice making cells of first and second rows may be referred to as D. An overlapping width (distance) in an X-axis direction between an icemaking cell of a first row and an ice making cell of a second row may be referred to as B. A distance from a second end of the second tray to an ice making cell of the second row may be referred to as C.

[0260] In this case, L (mm)=A+C+(D×(2n+1))−(B×2n). n is an integer greater than or equal to 1. B may be less than C and A. D may be greater than A and C.

[0261] In order to maintain an ice making amount within a set range, a diameter of an ice making cell may satisfy the following condition 2.L×17 / 76≤D⁢(mm)≤L×20 / 76

[0262] Unlike FIG. 18, if an ice making cell of a first row and an ice making cell of a second row are spaced apart in a Y-axis direction, a distance between an ice making cell of a first row and an ice making cell of the second row may be referred to as B.

[0263] In this case, L (mm)=A+C+(D×(2n+1))+(B×2n). n is an integer greater than or equal to 1. In this case, a diameter range of an ice making cell may satisfy the condition 2.

[0264] Meanwhile, in a specific row, ice making cells may be arranged in an odd or even number. At this time, the specific row is a row with a largest number of ice making cells among a plurality of rows.

[0265] In order to maintain an ice making amount within a set range in a specific row, a diameter of an ice making cell may satisfy the following condition 3.W×20 / 197≤D⁢(mm)≤W×27 / 197

[0266] A distance from a third end of the second tray to a first outermost cell of ice making cells in a second row may be E, and a diameter of an ice making cell in the second row may be D. A gap between ice making cells in the second row may be F. A gap between two specific ice making cells may be G. A distance from a fourth end of the second tray to a second outermost cell of ice making cells in the second row may be H. The third end and the fourth end may be spaced apart in an X-axis direction.

[0267] In this case, W (mm)=E+G+H+(D×m)+F×(m−1).

[0268] m may be an integer greater than or equal to 5.

[0269] E may be greater than F. H may be greater than F. G may be greater than F. G may be equal to E or H, or greater than E or H. D may be greater than E, F, G, and H.

[0270] Meanwhile, a line connecting a center of one ice making cell in the first row and centers of two ice making cells in the second row adjacent to the one ice making cell may be an equilateral triangle. A line connecting a center of one ice making cell in the second row and centers of two ice making cells in the first row adjacent to the one ice making cell may be an equilateral triangle.

[0271] A line connecting a center of another ice making cell in the first row and centers of two ice making cells in the second row adjacent to the other ice making cell may be a non-equilateral triangle. A line connecting a center of another ice making cell in the second row and centers of two ice making cells in the first row adjacent to the other ice making cell may be a non-equilateral triangle. Lengths of lines forming a non-equilateral triangle may be different from each other.

[0272] A distance between two adjacent ice making cells in the first row may be different from A distance between another two ice making cells. A distance between two adjacent ice making cells in the second row may be different from a distance between another two ice making cells.

[0273] Hereinafter, an operation of the ice maker 200 will be described.

[0274] FIG. 19 is a cross-sectional view showing an ice maker at a water supply position of a second tray assembly according to the present embodiment. FIG. 20 is a cross-sectional view showing an ice maker at an ice making position of a second tray assembly according to the present embodiment. FIG. 21 is a cross-sectional view showing an ice maker when a second tray assembly is to a full ice detection position in an ice separation process.

[0275] FIG. 22A is a cross-sectional view showing an ice maker in a state where a first column of a second pusher is in contact with a second tray, and FIG. 22B is a cross-sectional view showing an ice maker in a state where a second column of a second pusher is in contact with a second tray.

[0276] FIG. 23A is a drawing showing a state where a first column of a second pusher presses a second tray in an ice separation position, and FIG. 23B is a drawing showing a state where a second column of a second pusher presses a second tray in an ice separation position. FIG. 24 is a control block diagram of a refrigerator according to the present embodiment.

[0277] Referring to FIGS. 19 to 24, the refrigerator may further include a controller 100. The controller 100 may be installed or separated from a component for control. The controller 100 may be disposed inside or outside the component for control.

[0278] The driver 480 may be controlled by the controller 100. The controller may control the driver 480 so that the second tray assembly 202 moves to a water supply position, an ice making position, a full ice detection position, and an ice separation position.

[0279] A position of the second tray assembly 202 in FIG. 19 is a water supply position. A position of the second tray assembly 202 in FIG. 20 is an ice making position. A position of the second tray assembly 202 in FIG. 21 is a full ice detection position. A position of the second tray assembly 202 in FIG. 23 is an ice separation position.

[0280] The second tray assembly 202 may move in a first direction from the water supply position to the ice making position. The first direction is clockwise direction in the drawing. The second tray assembly 202 may move in a second direction, which is opposite to the first direction, from the ice making position to the water supply position. The second direction is counterclockwise direction in the drawing.

[0281] The second tray assembly 202 may move in the second direction from the water supply position to the full ice detection position. The second tray assembly 202 may move in the second direction from the full ice detection position to the ice separation position. The second tray assembly 202 may move in the first direction from the ice separation position to the water supply position.

[0282] Referring to FIG. 19, a water supply process may be performed at an water supply position of the second tray assembly 202. Water may be supplied to the ice making cell 203 through the water supply 240.

[0283] At the water supply position of the second tray assembly 202, at least a portion of the second tray 360 may be spaced apart from the first tray 320. For example, the first cell 321 and the second cell 361 may be spaced apart from each other.

[0284] The first row may be positioned closer to a rotation center C1 of the second tray assembly 202 than the second row. A distance between the second cell portion 321b of the first tray 320 and the second cell portion 361b of the second tray 360 in the second row may be greater than a distance between the first cell portion 321a of the first tray 320 and the first cell portion 361a of the second tray 360 in the first row.

[0285] The first pusher 510 may include a first column 513. A first column 513 of the first pusher 510 may separate ice from an ice making cell 203 of the first row. The first column 513 may push ice of the ice making cell 203 of the first row. The first pusher 510 may include a second column 514. The second column 514 may separate ice from an ice making cell 203 of the second row. The second column 514 may push ice of the ice making cell 203 of the second row.

[0286] Each of the first column 513 and the second column 514 may include a first edge 513b, 514b to press ice, and a second edge 513c, 514c positioned opposite the first edge 513b, 514b. The first edge 513b, 514b may be positioned closer to the ice making cell 203 than the second edge 513c, 514c.

[0287] At the water supply position and / or ice making position, the second portion 302 of the first tray cover 300 may overlap the pusher body 511 in a horizontal direction.

[0288] The first portion 301 may be positioned between the first edge 513b, 514b and the ice making cell 203. The first edge 513b, 514b may be positioned outside the cooling passage 310. At the water supply position, the second portion 302 of the first tray cover 300 may face the first pusher 510. When a water supply is completed, the second tray assembly 202 may move to an ice making position. When the second tray assembly 202 moves to the ice making position, the first tray 320 and the second tray 360 may be in contact with each other. In this state, a complete ice making cell 203 may be formed by the first cell 321 and the second cell 322. A portion of the water received in the second tray 360 may be distributed to the first cell 321 of the first tray 320.

[0289] At the ice making position, a portion of the full ice detection lever 550 may be positioned below the second pusher 530. For example, the lever body 552 may be positioned below the second pusher 530. At least a portion of the first extension 553 connected to the driver 480 may be extended in a direction close to the second pusher 530.

[0290] At the ice making position, an ice making process may be performed. Cold air may flow through the cold air guide 270. Cold air flowing through the cold air guide 270 may flow between the first tray cover 300 and the first tray 320. In the present embodiment, cold air may be supplied to the ice making chamber 122 even during the water supply process. Alternatively, cold air can be supplied to the ice making chamber 122 only during an ice making process. Cold air may be supplied to the ice making chamber 122 even during an ice separation process. Air flowing through the cold air guide 270 may flow from a first row to the second row. That is, cold air may cool an ice making cell of the first row first. If a number of ice making cells of the first row is less than a number of ice making cells of the second row, a flow resistance of the cold air by the first row may be reduced. Cold air flowing between two ice making cells of the first row collides with a wall of an ice making cell corresponding to two ice making cells of the first row in the second row and flows along the wall, so that a cooling performance of ice making cells of the second row may be maintained.

[0291] During an ice making process, it may be determined whether an ice making is complete based on at least one of a temperature detected by the temperature sensor 710 or a time for supply cold air.

[0292] When an ice making is completed, an ice separation process may be performed. The ice separation process may include a heating process in which the heater 330 operates. When the heater 330 is turned on, heat of the heater 330 may be transferred to the ice making cell 203. Ice may be separated from the first tray 320 by heat of the heater 330. A turning off of the heater 330 may be determined based on at least one of an operating time of the heater 330 or a temperature detected by the temperature sensor 710.

[0293] The ice separation process may further include a moving process in which the second tray assembly 202 moves. The moving process may be performed after the heater 330 is turned off, or the moving process may be performed while the heater 330 is operating, and the heater 330 may be turned off during the moving process.

[0294] In the ice separation process, the second tray assembly 202 may move in the second direction (direction of arrow A) from the ice making position toward the ice separation position.

[0295] In the ice separation process, while the second tray assembly 202 moves in the second direction, a power of the driver 480 may be transmitted to the full ice detection lever 550 to move. The full ice detection lever 550 may be maintained in a stopped state before the second tray assembly 202 is rotated by a predetermined angle in the second direction from the ice making position. The full ice detection lever 550 may be rotated when the second tray assembly 202 is rotated by the predetermined angle or more. At this time, the full ice detection lever 550 may be rotated in a first direction (direction of arrow B) opposite to a rotational direction of the second tray assembly 202.

[0296] In a state in which the second tray assembly 202 is moved to the full ice detection position, the full ice detection lever 550 may also be moved to a full ice detection position. At this time, the lever body 552 may be spaced apart from the second tray assembly 202.

[0297] If a full ice is not detected in a state in which the second tray assembly 202 is moved to the full ice detection position, the second tray assembly 202 may be additionally moved in the second direction toward the ice separation position.

[0298] While the second tray assembly 202 is additionally moved in a state in which the full ice detection lever 550 is moved to the full ice detection position, the full ice detection lever 550 may also be moved in the second direction and returned to an initial position. Accordingly, an interference between the full ice detection lever 550 and the second tray assembly 202 may be prevented.

[0299] Meanwhile, while the second tray assembly 202 is moved from the ice making position to the ice separation position, the columns 513 and 514 of the first pusher 510 may be inserted into the first cell 321 by passing through the through holes 323a and 323b of the first tray 320. In a process of inserting the columns 513 and 514 of the first pusher 510 into the first cell 321, the columns 513 and 514 of the first pusher 510 may press ice.

[0300] The second pusher 530 may include a first column 532. The second pusher 530 may further include a second column 533. The first column 532 may separate ice from the ice making cell 203 of the first row. The second column 533 may separate ice from the ice making cell 203 of the second row.

[0301] While the second tray assembly 202 is moved to the ice separation position, the first column 532 of the second pusher 530 may first contact the second tray 360 as shown in FIG. 22A. The first column 532 may be positioned closer to a vertical line V1 passing through a rotation center C1 than the second column 533.

[0302] A distance between a first row and the rotation center C1 in the second tray 360 is different from a distance between a second row and the rotation center C1 in the second tray 360. Therefore, positions of the first column 532 and the second column 533 need to be different with respect to a vertical line V1 passing through a rotation center C1. A horizontal distance between the first column 532 and the vertical line V1 may be less than a horizontal distance between the second column 533 and the vertical line V1.

[0303] The first column 532 may include a first pressing surface 532b. The first pressing surface 532b may press a portion corresponding to the first row in the second tray 360. The second column 533 may include a second pressing surface 533b. The second pressing surface 533b may press a portion corresponding to the second row in the second tray 360.

[0304] The first pressing surface 532b may be inclined with respect to the vertical line V1. The second pressing surface 533b may be inclined with respect to the vertical line V1. An inclination angle of the first pressing surface 532b may be different from an inclination angle of the second pressing surface 533b. For example, an inclination angle of the first pressing surface 532b with respect to a vertical line may be less than an inclination angle of the second pressing surface 533b.

[0305] In a state in which the first column 532 is in contact with the second tray 360, the second column 533 may be spaced apart from the second tray 360. In this state, when the second tray assembly 202 is further moved in the second direction, the second column 533 may be in contact with the second tray 360 as shown in FIG. 22B. The first column 532 may press the first row in the second tray 360, so that a portion of the second cell wall 362 forming the first row can be deformed.

[0306] Referring to FIG. 23, when the second tray assembly 202 is moved to the ice separation position, a portion of the second cell wall 362 forming the first row is deformed by the first column 532, so that ice in the first row can be separated from the second tray 360. In addition, another portion of the second cell wall 362 forming the second row is deformed by the second column 533, so that ice in the second row can be separated from the second tray 360.

[0307] At the ice separation position, the first edges 513b, 514b of the first and second columns 513, 514 of the first pusher 510 may pass through the first cell 321 and be positioned outside of the first cell 321. For example, the first edges 513b, 514b may be positioned lower than the first tray 320 based on the drawing. According to the present embodiment, ice may be sufficiently pressed by the first edges 513b, 514b, so that ice separation performance may be improved.

[0308] Ice separated from the second tray assembly 202 may fall downward and be stored in the ice bin 600.

[0309] After the second tray assembly 202 is moved to the ice separation position, the second tray assembly 202 may be moved in the first direction toward the water supply position.

Claims

1. A refrigerator comprising:an ice making chamber to provide a space in which ice is generated;a cooler configured to supply cold or operable to supply cold to the ice making chamber;an ice maker configured to define ice making cells, which is a space in which water is phase-changed into ice by the cold,wherein the ice maker includes a first tray assembly to define a portion of the ice making cells, anda second tray assembly to define another portion of the ice making cells,wherein ice making cells are arranged in a plurality of rows, and each of the plurality of rows includes a plurality of ice making cells.

2. The refrigerator of claim 1,wherein a number of a plurality of ice making cells in a first row among the plurality of rows is different from a number of a plurality of ice making cells in a second row.

3. The refrigerator of claim 2,wherein the second tray assembly is rotated relative to the first tray assembly with respect to a rotation center, the first row is positioned closer to the rotation center than the second row, and the number of the plurality of ice making cells in the first row is less than the number of the plurality of ice making cells in the second row, orfurther an ice making chamber door that opens and closes the ice making chamber, wherein the second row is positioned closer to the ice making chamber door than the first row, and the number of the plurality of ice making cells in the first row is less than the number of the plurality of ice making cells in the second row.

4. The refrigerator of claim 1,wherein the plurality of rows includes a first row and a second row,the first row and the second row are arranged in a Y-axis direction, andone ice making cell of the first row overlaps two ice making cells of the second row adjacent to the one ice making cell in a Y-axis direction.

5. The refrigerator of claim 1,wherein the plurality of ice making cells are arranged within a predetermined area of the ice maker, the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, andwhen the plurality of rows are even rows, a diameter (D) of the ice making cell satisfies L×20 / 76≤D≤L×27 / 76.

6. The refrigerator of claim 1,wherein the plurality of ice making cells are arranged within a predetermined area of the ice maker, the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, andwhen the plurality of rows are odd rows, a diameter (D) of ice making cell satisfies L×17 / 76≤D≤L×20 / 76.

7. The refrigerator of claim 1,wherein the plurality of rows includes a first row and a second row, andan ice making cell of the first row and an ice making cell of the second row are spaced apart from each other by a set distance in a Y-axis direction or overlapped by a set width in an X-axis direction.

8. The refrigerator of claim 1,wherein the plurality of ice making cells are arranged within a predetermined area of the ice maker, the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, andin a specific row having a largest number of ice making cells among the plurality of rows, a diameter (D) of the ice making cell satisfies W×20 / 197≤D≤W×27 / 197.

9. The refrigerator of claim 1,wherein a distance between two adjacent ice making cells in a first row among the plurality of rows is different from a distance between two other adjacent ice making cells in the first row.

10. The refrigerator of claim 1,wherein a distance between two adjacent ice making cells in a second row among the plurality of rows is different from a distance between two other adjacent ice making cells in the second row.

11. The refrigerator of claim 1,wherein a line connecting a center of one ice making cell in a first row among the plurality of rows and centers of two ice making cells in a second row adjacent to the one ice making cell is an equilateral triangle.

12. The refrigerator of claim 1,wherein a line connecting a center of one ice making cell in a second row among the plurality of rows and centers of two ice making cells in a first row adjacent to the one ice making cell is an equilateral triangle.

13. The refrigerator of claim 1,wherein a line connecting a center of another ice making cell in a first row among the plurality of rows and centers of two ice making cells in a second row adjacent to the other ice making cell is a non-equilateral triangle.

14. The refrigerator of claim 1,wherein a line connecting a center of another ice making cell in a second row among the plurality of rows and centers of two ice making cells in a first row adjacent to the other making cell is a non-equilateral triangle.

15. The refrigerator of claim 13,wherein a length of each of lines in the non-equilateral triangle is different from each other.

16. The refrigerator of claim 1,further comprising a temperature sensor to detect a temperature of water or ice in the ice making cell,wherein the temperature sensor includes a portion positioned between two adjacent ice making cells in the first row among the plurality of rows, or includes a portion positioned between two adjacent ice making cells in a second row.

17. A refrigerator comprising:a cabinet having a storage space;a door that opens and closes the storage space;an ice making chamber provided in the door;an ice maker provided in the ice making chamber and configured to generate ice; andan ice bin configured to store ice generated by the ice maker; anda dispenser provided in the door and configured to discharge ice stored in the ice bin,wherein the ice maker includes a first tray assembly having a first tray to define a portion of an ice making cell, and a second tray assembly having a second tray to define another portion of the ice making cell,wherein the ice making cell includes a plurality of ice making cells in a first row and a plurality of ice making cells in a second row, andwherein the first row is positioned closer to a front surface of the door than the second row.

18. The refrigerator of claim 17,wherein a number of the plurality of ice making cells in the first row is less than a number of the plurality of ice making cells in the second row.

19. The refrigerator of claim 17,wherein the plurality of ice making cells in the first row and the second row are arranged within a predetermined area of the ice maker, the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, anda diameter (D) of each of the ice making cells satisfies L×20 / 76≤D≤L×27 / 76.

20. The refrigerator of claim 17,wherein in a case in which the ice making cell includes a plurality of ice making cells in a third row in addition to the first and second rows, a plurality of ice making cells of the first to third rows are arranged within a predetermined area of the ice maker, and the predetermined area is determined by L, which is a length in a Y-axis direction, and W, which is a length in an X-axis direction, and a diameter (D) of the ice making cell satisfies L×17 / 76≤D≤L×20 / 76.

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