Refrigerator

Abstract

A refrigerator of the present embodiment comprises: a cabinet which forms a storage compartment; a door which opens and closes the storage compartment; and an ice maker which is provided in the door or storage compartment and produces ice, wherein the ice maker comprises: a first tray which forms a part of an ice-making cell; a second tray which forms the other part of the ice-making cell and is movable relative to the first tray; a drive unit which provides power to move the second tray; and a transmission mechanism for moving the first tray by transmitting the moving force of the second tray or the power of the drive unit to the first tray in the process of moving the second tray.

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] The refrigerator may be a side-by-side type refrigerator in which a freezing chamber and a refrigerating chamber are arranged left and right, a top mount type refrigerator in which the freezing chamber is located above the refrigerating chamber, or a bottom freezer type refrigerator in which the refrigerating chamber is located above the freezing chamber.

[0004] Typically, an ice maker is provided in the freezing chamber of a refrigerator to make ice. The ice maker receives water supplied from a water source or a water tank in a tray and cools the water to generate ice. The ice generated by the ice maker may be stored in an ice bin.

[0005] The ice stored in the ice bin can be discharged through a dispenser provided in the door, or the user can open a freezing chamber door, approach the ice bin, and take out the ice in the ice bin.

[0006] A refrigerator is disclosed in Korean Patent Publication No. 10-2021-00057839 that is a prior art document.

[0007] A refrigerator of the prior art document may include a freezing chamber, a cooler for supplying cold air to the freezing chamber, and an ice maker provided in the freezing chamber.

[0008] The ice maker includes a first tray to form a portion of an ice making cell, which is a space where water is phase-changed into ice by cold; a second tray to form another portion of the ice making cell; a water supply to supply water to the ice making cell; a first pusher passing through the first tray to separate ice in an ice separation process; a second pusher to press the second tray in an ice separation process; an ice separation heater for supplying heat to the ice making cell in an ice separation process; and a transparent ice heater for supplying heat to the ice making cell in an ice making process.

[0009] According to the prior art document, since the first tray is supported by the first tray supporter and the first tray cover, there is a disadvantage in that a configuration for supporting the first tray in an ice maker is complicated.

[0010] According to the prior art document, in order to separate ice in an ice separation process, there is a first pusher that presses ice, and since the first pusher receives a rotational power of the second tray by a pusher link, there is a disadvantage in that an additional space is required for installing the first pusher and an additional configuration is required for transmitting power to the first pusher.

[0011] According to the prior art document, since the transparent ice heater and the ice separation heater are separated, there is a disadvantage in that a structure is complex and a separate control algorithm is required to control the two heaters.[Disclosure] [Technical Problem]

[0012] One embodiment provides a refrigerator capable of generating spherical ice by a simple structure.

[0013] Alternatively or additionally, one embodiment provides a refrigerator capable of maintaining a constant shape of generated ice regardless of a change in an amount of water supplied.

[0014] Alternatively or additionally, one embodiment provides a refrigerator capable of improving ice separation performance by moving each of a first tray and a second tray in an ice separation process.

[0015] Alternatively or additionally, one embodiment provides a refrigerator in which a heater is operable to generate ice having high transparency in an ice making process, operable to separate ice in an ice separation process.[Technical Solution]

[0016] In one embodiment, a refrigerator may include a cabinet to form a storage space. The refrigerator may further include a door to open and close the storage space. The refrigerator may further include an ice maker provided in the door or the storage space and for generating ice.

[0017] An ice maker may include a first tray to form a portion of an ice making cell. The ice maker may further include a second tray to form another portion of the ice making cell and being movable relative to the first tray.

[0018] The ice maker may further include a driver that provides a power for moving the second tray. The ice maker may further include a transmission assembly to transmit a moving power of the second tray or a power of the driver to the first tray to move the first tray during a movement of the second tray.

[0019] The ice maker may further include a bracket that movably supports the first tray. The first tray may be rotatably supported by the bracket.

[0020] The bracket may include a stopper that contacts a portion of the first tray and restricts a movement of a contacted portion.

[0021] The transmission assembly may include a first transmission connected to the second tray. The transmission assembly may further include a second transmission connected to the first tray. The driver may be connected to the first transmission. The first tray may include a shaft to provide a rotation center. The second transmission may be connected to the shaft. Alternatively, the second transmission may be provided at a position spaced apart from the shaft. The second transmission may be integrally formed with the first tray or may be coupled to the first tray.

[0022] While the second tray moves in a forward direction, the first tray may move in a reverse direction opposite to the forward direction.

[0023] The first transmission may include an extension. The second transmission may include a contact portion in contact with the extension during a movement of the second tray.

[0024] The ice maker may further include a heater to supply heat to the ice making cell. The ice maker may further include a heater case that supports the heater. A portion of the first transmission may be provided in the heater case.

[0025] The first transmission may include a first portion provided in the heater case. The first transmission may further include a second portion separated from the first portion and connected to the heater case and the second tray.

[0026] The first transmission may include a first cam surface to move the first tray in a forward direction. The first transmission may further include a second cam surface to move the first tray in a reverse direction. The first transmission may further include a third cam surface to further rotate the first tray in the reverse direction.

[0027] The second tray may move in a forward direction from an ice making position to an ice separation position and then move from the ice separation position to the ice making position. In a process of the second tray moving from the ice separation position to the ice making position, the first tray may be moved by the transmission assembly and then returned to an initial position before the second tray moves to the ice making position.

[0028] In a process of the second tray moving in a forward direction, the first tray may move in the forward direction and then move in a reverse direction which is an opposite direction to the forward direction.

[0029] The second tray may move in a forward direction from an ice making position to an ice separation position. Before the second tray reaches the ice separation position, the first tray may move in the reverse direction and then return to an initial position, and then additionally move in the reverse direction again.

[0030] The ice maker may further include a stopper that restricts a movement of a portion of the second tray during a movement of the second tray.

[0031] The ice maker may further include a channel provided in at least one of the first tray or the second tray. The ice maker may further include a water storage provided in the second tray and to store water overflowing from the ice making cell through the channel. The ice maker may further include a pusher to press the water storage during a process in which the second tray moves to an ice separation position.

[0032] The ice maker may further include a channel provided in at least one of the first tray or the second tray, and a water guide to guide water overflowing from the ice making cell through the channel. The ice maker may further include a water storage in which water flowing along the guide is stored.

[0033] In another embodiment, a refrigerator may include a driver that generates power. The ice maker may further include a first tray to form a portion of an ice making cell, and a second tray to form another portion of the ice making cell and being movable with respect to the first tray. The ice maker may include a first transmission that transmits power of the driver to the first tray. The ice maker may further include a second transmission that transmits power of the driver to the first tray.[Advantageous Effects]

[0034] According to one embodiment, there is an advantage in that spherical ice may be produced by a simple structure.

[0035] According to one embodiment, since a predetermined amount of water may be filled in an ice making cell even if an amount of water supplied is changed, there is an advantage in that generated may maintain a certain shape.

[0036] According to one embodiment, since each of a first tray and a second tray may move and twist in an ice separation process, there is an advantage in that a separation performance of ice can be improved.

[0037] According to one embodiment, the heater may operate to generate ice with high transparency during an ice making process, and the heater may operate to separate ice during an ice separation process, so that a installation structure of a heater and control algorithm of a heater are simplified.[Description of Drawings]

[0038] FIG. 1 is a front view of a refrigerator according to a first embodiment. FIG. 2A is a drawing showing a state in which a refrigerator door is separated from a refrigerator, and FIG. 2B is a side view of a refrigerating chamber door. FIG. 3 is a perspective view of an ice maker according to a first embodiment. FIG. 4 is an exploded perspective view of an ice maker of FIG. 3. FIG. 5 is a perspective view showing a state where a first tray and a second tray are aligned in a vertical direction. FIG. 6 is a drawing showing a bracket as viewed from a lower side according to a first embodiment. FIG. 7 is a view showing a state where a first tray is supported by a bracket according to a first embodiment. FIG. 8 is a view of a first transmission as viewed from one side according to a first embodiment. FIG. 9 is a view of a second transmission as viewed from one side according to a first embodiment. FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 3. FIG. 11 is a drawing showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 12 is a drawing showing a first tray in a twisted state. FIG. 13 is a perspective view of an ice maker according to a second embodiment. FIG. 14 is an exploded perspective view of an ice maker of FIG. 13. FIG. 15 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a second embodiment. FIG. 16 is a perspective view of a first tray and a first transmission as viewed from one side according to a second embodiment. FIG. 17 is a perspective view of a first tray and a first transmission as viewed from a rear side according to a second embodiment. FIG. 18 is a view of a first tray and a first transmission as viewed from an upper side according to a second embodiment. FIG. 19 is a side view of a first tray and a first transmission according to a second embodiment. FIG. 20 is a plan view showing a heater installed in a heater case according to a second embodiment. FIG. 21 is a perspective view showing a heater installed in a heater case according to a second embodiment. FIGS. 22 to 24 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 25 is a drawing showing a first tray in a twisted state. FIG. 26 is a front view of an ice maker according to a third embodiment. FIG. 27 is an exploded perspective view of an ice maker of FIG. 26. FIG. 28 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a third embodiment. FIG. 29 is a perspective view of a first tray and a first transmission viewed from one side according to a third embodiment. FIG. 30 is a perspective view of a first tray and a first transmission viewed from a rear side according to a third embodiment. FIG. 31 is a view of a first tray and a first transmission viewed from a rear side according to a third embodiment. FIG. 32 is a side view of a first tray and a first transmission according to a third embodiment. FIG. 33 is a perspective view of a second tray according to a third embodiment. FIG. 34 is a view showing a state in which a water storage and a fixing portion are coupled with a second tray of FIG. 33. FIG. 35 is a side view of a heater case according to a third embodiment. FIG. 36 is a perspective view showing a heater seated on a heater case according to a third embodiment. FIG. 37 is a perspective view of a bracket according to a third embodiment. FIGS. 38 to 40 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 41 is a drawing showing a state in which a second tray is in contact with a stopper. FIG. 42 is a drawing showing a second tray in a twisted state. FIG. 43 is a drawing showing relative positions of a pusher and a second tray during an operation of an ice maker according to a third embodiment. FIG. 44 is a perspective view of an ice maker according to a fourth embodiment. FIG. 45 is an exploded perspective view of an ice maker of FIG. 44. FIG. 46 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a fourth embodiment. FIG. 47 is a perspective view of a first tray and a first transmission viewed from one side according to a fourth embodiment. FIG. 48 is a perspective view of a first tray and a first transmission viewed from a rear side according to a fourth embodiment. FIG. 49 is a view of a first tray and a first transmission viewed from a rear side according to a fourth embodiment. FIG. 50 is a side view of the first tray and the first transmission according to a fourth embodiment. FIG. 51 is a plan view showing a heater mounted on a heater case according to a fourth embodiment. FIG. 52 is a perspective view showing a heater mounted on a heater case according to a fourth embodiment. FIGS. 53 to 55 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 56 is a cross-sectional view taken along line 56-56 of FIG. 46. FIG. 57 is a cross-sectional view taken along line 57-57 of FIG. 44. FIG. 58 is a cross-sectional view taken along line 58-58 of FIG. 46. FIG. 59 is a drawing showing relative positions of a first tray and a second tray in an ice maker according to a fifth embodiment. FIG. 60 is a drawing showing a heater installed in a heater case according to a sixth embodiment. FIG. 61 is a drawing showing a heater installed in a heater case according to a seventh embodiment. [Mode for Invention]

[0039] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that when components in the drawings are designated by reference numerals, the same components have the same reference numerals as far as possible even though the components are illustrated in different drawings. Further, in description of embodiments of the present disclosure, when it is determined that detailed descriptions of well-known configurations or functions disturb understanding of the embodiments of the present disclosure, the detailed descriptions will be omitted.

[0040] Also, in the description of the embodiments of the present disclosure, the terms such as first, second, A, B, (a) and (b) may be used. Each of the terms is merely used to distinguish the corresponding component from other components, and does not delimit an essence, an order or a sequence of the corresponding component. It should be understood that when one component is "connected", "coupled", "joined" or "supported" to another component, the former may be directly connected, coupled, jointed or supported to the latter or may be "connected", coupled", "joined" or supported to the latter with a third component interposed therebetween.

[0041] In this specification, at least one of component A and component B may be interpreted as including component A, or component B, or component A and component B.

[0042] In addition, at least one of component A or component B may be interpreted as including component A, or component B, or component A and component B.

[0043] This specification describes a number of embodiments, and the present invention may also include embodiments derived by combining two or more embodiments. The present invention may also include embodiments derived by extracting and combining some configurations of each of two or more embodiments.

[0044] FIG. 1 is a front view of a refrigerator according to a first embodiment. FIG. 2A is a drawing showing a state in which a refrigerator door is separated from a refrigerator, and FIG. 2B is a side view of a refrigerating chamber door.

[0045] Referring to FIGS. 1 and 2, a refrigerator 1 of the present embodiment may include a cabinet 14 having a storage space. The refrigerator 1 may further include a refrigerator door to open and close the storage space.

[0046] The storage space may include a refrigerating chamber 18. The storage space may optionally or additionally include a freezing chamber 19. For example, FIG. 2 illustrates that the storage space includes a refrigerating chamber 18 and a freezing chamber 19.

[0047] FIG. 2 illustrates that a refrigerator 1 is a bottom freezer type refrigerator, but it should be noted that spirit of the present invention may be equally applied to a side-by-side type refrigerator or a top mount type refrigerator.

[0048] The refrigerator door may include a refrigerating chamber door 5 and a freezing chamber door 30. The refrigerating chamber 18 may be opened and closed by one or more refrigerating chamber doors 5. The freezing chamber 19 may be opened and closed by one or more freezing chamber doors 30. Hereinafter, the refrigerating chamber 18 is described as being opened and closed by a first refrigerating chamber door 10 and a second refrigerating chamber door 20 as an example.

[0049] At least one of the first refrigerating chamber door 10 or the second refrigerating chamber door 20 may include a dispenser 11 to discharge water and / or ice. Of course, depending on a type of refrigerator, the freezing chamber door 30 may also be provided with the dispenser 11.

[0050] The refrigerator 1 may further include an ice maker 200. The ice maker 200 may be disposed in the freezing chamber 19. Alternatively or additionally, the ice maker 200 may be provided in the refrigerating chamber door 5. That is, a refrigerator 1 may include one ice maker 200 or may include a plurality of ice makers 200.

[0051] When the refrigerator 1 includes one ice maker 200, the ice maker 200 may be disposed in a storage space, a refrigerating chamber door 5, or a freezing chamber door 30. When the refrigerator 1 includes a plurality of ice makers 200, 200a, the plurality of ice makers 200, 200a may be disposed in a storage space, a refrigerating chamber door 5, or a freezing chamber door 30. Alternatively, one ice maker 200 may be disposed in a storage space, and another ice maker 200a may be disposed in a refrigerating chamber door 5 or a freezing chamber door 30. Alternatively, a plurality of ice makers 200, 200a may be disposed in a refrigerating chamber door 5 or a freezing chamber door 30.

[0052] For example, it is possible that a first refrigerating chamber door 10 includes a single space, and the ice maker 200a may be received in the single space. Alternatively, it is possible that a first refrigerating chamber door 10 includes a first space 122 and a second space 124, and an ice maker 200, 200a is provided in at least one of the two spaces 122, 124. Alternatively, it is possible that ice makers 200, 200a are provided in each of the two spaces 122, 124. For example, a second ice maker 200a may be provided in a first space 122, and a first ice maker 200 may be provided in a second space 124.

[0053] Ice generated in the second ice maker 200a may be stored in a second ice bin 300a. Ice generated in the first ice maker 200 may be stored in a first ice bin 300.

[0054] Ice stored in the second ice bin 300a may be discharged to an outside through the dispenser 11. As another example, the dispenser 11 may include a first dispenser from which ice generated in the second ice maker 200a is discharged, and a second dispenser from which ice generated in a first ice maker 200 is discharged.

[0055] In the present embodiment, the first ice maker 200 may be omitted, and in this case, the second space 124 may be present. In this case, the second space 124 may function as a door storage space used for a specific purpose. Alternatively, the second ice maker 200a may be omitted. A shape of ice generated by the second ice maker 200a may be the same as or different from a shape of ice generated by the first ice maker 200. For example, the first ice maker 200 may form spherical ice. The "spherical shape" mentioned herein means not only a geometrically spherical shape but also a shape similar to a spherical shape.

[0056] A transparency of ice generated by from the first ice maker 200 may be the same as or different from a transparency of ice generated by the second ice maker 200a. For example, a transparency of ice generated by the first ice maker 200 may be higher than a transparency of ice generated by the second ice maker 200a. A size (or volume) of ice generated by the second ice maker 200a may be different from a size (or volume) of ice generated by the first ice maker 200. For example, a size (or volume) of ice generated by the first ice maker 200 may be greater than a size (or volume) of ice generated by the second ice maker 200a.

[0057] A structure of the second ice maker 200a for generating ice and a method by which the generated ice is separated may be the same as or different from a structure of the first ice maker 200 and a method by which the ice generated in the first ice maker 200 is separated.

[0058] If structures and / or ice separating methods of ice makers are different, a shape of a first space 122 in which the second ice maker 200a is disposed may be different from a shape of a second space 124 in which the first ice maker 200 is disposed.

[0059] Hereinafter, an ice maker 200 capable of generating spherical ice will be described as an example.

[0060] FIG. 3 is a perspective view of an ice maker according to a first embodiment. FIG. 4 is an exploded perspective view of an ice maker of FIG. 3. FIG. 5 is a perspective view showing a state where a first tray and a second tray are aligned in a vertical direction.

[0061] Referring to FIGS. 3 to 5, an ice maker 200 of the present embodiment may include a first tray 230 to form a portion of an ice making cell. The ice maker 200 may include a second tray 240 to form another portion of the ice making cell. The ice making cell may be clearly understood by a drawing symbol IC of FIG. 43. The ice making cell formed by the first tray 230 and the second tray 240 may have, for example, a spherical shape.

[0062] The second tray 240 is movable relative to the first tray 230. At this time, the second tray 240 may rotate or move linearly relative to the first tray 230. Hereinafter, as an example, it will be described that the second tray 240 is rotatable with respect to the first tray 230.

[0063] In terms of the transmission assembly described below, the same or similar application may be applied to a case where the second tray 240 moves linearly.

[0064] The ice maker 200 may further include a bracket 210 (or a tray case) to support the first tray 230. The bracket 210 may be mounted on the refrigerating chamber door 5 or the freezing chamber door 30. Alternatively, the bracket 210 may be mounted on a wall forming a storage space.

[0065] The bracket 210 may, for example, guide cold air toward the ice making cell. The bracket 210 may include a cold air hole 219. The bracket 210 may further include a plate 211. An opening 212 may be formed in the plate 211. The opening 212 may be aligned with at least a portion of the first tray 230. Cold air may be supplied to the first tray 230 through the opening 212. The opening 212 may allow water to pass through.

[0066] The first tray 230 may be movably connected to the bracket 210. For example, the first tray 230 may be rotatably connected to the bracket 210 or may be connected to enable linear or curved movement. Hereinafter, as an example, it will be described that the first tray 230 is rotatably connected to the bracket 210.

[0067] The bracket 210 may further include a motor supporter 213 that supports the driver 220. The driver 220 may include, for example, a motor, a power transmission that transmits power of the motor, and a motor housing 222 that receives the motor.

[0068] The power transmission may include a connector 224. The connector 224 may pass through the motor supporter 213. The connector 224 may be connected to a transmission assembly to be described later. When the motor operates in a state in which the connector 224 is connected to the transmission assembly, a power of the motor is transmitted to the transmission assembly, so that the second tray 240 may move.

[0069] The first tray 230 may include a first cell wall 231. The first cell wall 231 may form a portion of the ice making cell. A first opening 233 may be formed in the first cell wall 231. The first opening 233 may serve as a passage through which water and / or air may flow.

[0070] The first tray 230 may include a first shaft 236 and a second shaft 237. The first shaft 236 and the second shaft 237 may provide a rotation center of the first tray 230. For example, the first tray 230 may be rotated by the first and second shafts 236, 237 as a rotation center.

[0071] Alternatively, the first tray 230 may include a first shaft, and the bracket 210 may include a second shaft. In this case, the first shaft may be rotatably connected to the bracket 210, and the second shaft may be rotatably connected to the first tray 230. Alternatively, the bracket 210 may include first and second shafts, and the first tray 230 may include a shaft connecting portion to which the first and second shafts are connected.

[0072] In a case in which the first tray 230 includes the first and second shafts 236, 237, each of the first and second shafts 236, 237 may be rotatably supported by the bracket 210. Alternatively, the first shaft 236 may be rotatably supported by the bracket 210, and the second shaft 237 may be supported by a separate supporter 218. The supporter 218 may be coupled to the bracket 210 while supporting the second shaft 237.

[0073] For example, the first shaft 236 may extend from one side wall 231a of the first cell wall 231. The second shaft 237 may extend from another side wall 231b of the first cell wall 231. The one side wall 231a and another side wall 231b may face each other.

[0074] At least one of the one side wall 231a and the other side wall 231b may be provided with a protrusion 239. In FIG. 5, as an example, the one side wall 231a is illustrated with the protrusion 239. The protrusion 239 may be disposed to be spaced apart from the first shaft 236.

[0075] The second shaft 237 may be provided with a connecting protrusion 238 to be connected to a transmission assembly to be described later. The connecting protrusion 238 may protrude radially from the second shaft 237. The connecting protrusion 238 may be spaced apart from the other side wall 231b. As an example, it is also possible for a plurality of connecting protrusions 238 to protrude from the second shaft 237 at positions spaced apart from each other.

[0076] The second tray 240 may be moved to a first position, a second position, and a third position by receiving a power from the driver 220. The first position may be a water supply position. The second position may be an ice making position. The third position may be an ice separation position. The first position may be disposed between the second position and the third position.

[0077] The second tray 240 may be moved in a forward direction from the second position to the first position. The second tray 240 may be moved in the forward direction from the first position to the third position.

[0078] The second tray 240 may be moved in a reverse direction from the third position to the first position. The second tray 240 may be moved in the reverse direction from the first position to the second position. In some cases, the water supply position and the ice making position may be the same. In this case, the second tray 240 may be moved between an ice making position and an ice separation position.

[0079] The ice maker 200 may further include a transmission assembly. The transmission assembly may receive a power from the driver 220 to move the second tray 240. The transmission assembly may move the first tray 230 during a movement of the second tray 240. For example, the first tray 230 may be rotated during a rotating of the second tray 240.

[0080] In some cases, the first tray 230 may move linearly or in a curved manner during a rotating of the second tray 240. Alternatively, the first tray 230 may rotate or move linearly or in a curved manner during a rotating of the second tray 240.

[0081] The transmission assembly may include a first transmission 270 that transmits a power of the driver 220 to the second tray 240. The first transmission 270 may be connected to the connector 224. The first transmission 270 may be connected to the second tray 240. Therefore, the second tray 240 may be rotated together with the first transmission 270.

[0082] The ice maker 200 may further include a transmission shaft 280. The transmission shaft 280 transmits a rotational power of the first transmission 270 connected to one side of the second tray 240 to another side of the second tray 240. Accordingly, the second tray 240 may rotate stably as a whole. The first transmission 270 may be connected to one end of the transmission shaft 280. A shaft connector 286 may be connected to another end of the transmission shaft 280.

[0083] The first transmission 270 may include a body 271. The body 271 may have a variable diameter or a constant diameter in an extension direction of a rotation center, but is not limited thereto. The body 271 may include a first extension 273. The first extension 273 may extend in an axial direction. The first extension 273 may include a coupling portion 274. The coupling portion 274 may be coupled to the transmission shaft 280. The coupling portion 274 may have a protrusion 275 in a radial direction. Although not limited thereto, a plurality of protrusions 275 may protrude at spaced positions.

[0084] The transmission assembly may further include a second transmission 290 that interacts with the first transmission 270 to transmit a moving force of the second tray 240 to the first tray 230.

[0085] The second transmission 290 may be integrally formed with the first tray 230 or manufactured as a separate component from the first tray 230 and coupled to the first tray 230. FIG. 5 illustrates the second transmission 290 being coupled to the first tray 230. For example, the second transmission 290 may be coupled to the second shaft 237 of the first tray 230. The connecting protrusion 238 may be coupled to the second transmission 290.

[0086] The second transmission 290 may include a contact portion 295 in contact with the first transmission 270 during a movement of the first transmission 270. In a state in which the first transmission 270 is in contact with the contact portion 295, the second transmission 290 may receive a power from the first transmission 270.

[0087] The ice maker 200 may further include a heater 250. The heater 250 may provide heat to the ice making cell in an ice making process. When the heater 250 supplies heat to the ice making cell in an ice making process, a difference in ice making rate occurs in each region of the ice making cell, causing bubbles to move to a portion where water exists. When the bubbles gather in a portion of an ice making cell, a transparency of generated ice may increase. Since a generation of ice with high transparency by the heater 250 may be implemented by a known technology, a detailed description thereof will be omitted. However, in the present embodiment, the heater 250 may provide heat to the ice making cell even in an ice separation process.

[0088] The heater 250 may be positioned adjacent to the second tray 240. The heater 250 may provide heat to the second tray 240 in an ice separation process and an ice making process. Of course, heat provided to the second tray 240 may be transferred to the first tray 230.

[0089] The ice maker 200 may further include a heater case 260 that supports the heater 250. The heater case 260 may be coupled to the second tray 240 in a state in which the heater 250 is seated on the heater case 260. The heater 250 seated on the heater case 260 may be in contact with an outer surface of the second tray 240.

[0090] The ice maker 250 may further include a pressing portion 420 for additionally rotating the second tray 240 in a reverse direction in a state in which the second tray 240 is moved in the reverse direction to the ice making position. The pressing portion 420 may be connected to the first transmission 270. Accordingly, the pressing portion 420 may move together with the second tray 240.

[0091] In a state in which the second tray 240 is moved to an ice making position, the second tray 240 may be in contact with the first tray 230. In a state in which the second tray 240 is moved to an ice making position, the first transmission 270 may be further rotated in the reverse direction. By a rotation of the first transmission 270, the pressing portion 420 may be further rotated in the reverse direction, so that the pressing portion 420 may press the second tray 240 toward the first tray 230. Therefore, the first tray 230 and the second tray 240 may be maintained in close contact at the ice making position.

[0092] Meanwhile, the ice maker 200 may further include a lever 400 to detect a fullness of an ice bin 300. The lever 400 may be connected to the driver 220 and may be rotated by receiving a power from a motor. For example, a sensor detecting a rotational position of the lever 400 may be used to detect a fullness of ice.

[0093] The ice maker 200 may further include a water supply 410. The water supply 410 may guide water supplied from an external water source or a water tank provided in a refrigerator to the ice making cell. Therefore, the water supply 410 may also be referred to as a water supply guide. The water supply 410 may be integrally formed with the bracket 210 or may be coupled to the bracket 210 as a separate component from the bracket 210.

[0094] FIG. 6 is a drawing showing a bracket as viewed from a lower side according to a first embodiment. FIG. 7 is a view showing a state where a first tray is supported by a bracket according to a first embodiment. In FIG. 6, the motor supporter is omitted.

[0095] Referring to FIGS. 6 and 7, the bracket 210 may further include a first supporter 214 that movably supports the first tray 230. For example, a first shaft 236 of the first tray 230 may be rotatably connected to the first supporter 214. The first supporter 214 may, for example, extend downward from the plate 211.

[0096] The ice maker 200 may further include a second supporter 218 that movably supports the first tray 230. The second supporter 218 may be integrally formed with the bracket 210 or may be coupled to the bracket 210 while supporting the first tray 230. FIG. 7 illustrates a separate second supporter 218 coupled to the bracket 210 while supporting the first tray 230. The second supporter 218 may support the second shaft 237 of the first tray 230.

[0097] The first supporter 214 may include a hole 214a through which the first shaft 236 passes. After the first shaft 236 passes through the hole 214a, the second supporter 218 may be coupled to the bracket 210 while supporting the second shaft 237. In order for the second supporter 218 to rotatably support the second shaft 237, the second supporter 218 may be formed in a shape such as, for example, "U".

[0098] The bracket 210 may further include a side wall 216 disposed to face the motor supporter 213. The side wall 216 may extend from the plate 211. The side wall 216 may form the cold air hole 219.

[0099] The side wall 216 may be provided with a stopper 217 in contact with a protrusion 239 of the first tray 230. The stopper 217 may be integrally formed with the side wall 216 or may be coupled to the side wall 216. In a state in which the first tray 230 is stopped, a protrusion 239 of the first tray 230 may be positioned at an upper side of the stopper 217. When the protrusion 239 of the first tray 230 is positioned at an upper side of the stopper 217, while the first tray 230 is rotated, a rotation of the protrusion 239 of the first tray 230 is restricted by the stopper 217. Accordingly, there is a difference between an amount of rotation of one side wall 231a where the protrusion 239 is positioned in the first cell wall 231 and an amount of rotation of the other side wall 231b positioned opposite the one side wall 231a, so that the first cell wall 231 may be twisted. That is, the first cell wall 231 may be twisted, and ice may be separated from the first cell wall 231 by a twisting of the first cell wall 231.

[0100] The bracket 210 may further include a third supporter 215. For example, a plurality of third supporters 215 may be disposed to be spaced apart from each other in a horizontal direction. The third supporter 215 may include a hole 215a. The third supporter 215 may support the second tray 240 or support the first transmission 270 connected to the second tray 240 and / or the shaft connector 286. Accordingly, the bracket 210 may movably support the first tray 230 and the second tray 240. Of course, it is also possible for the second tray 240 to be supported by a separate structure by a structural change.

[0101] Meanwhile, the first cell wall 231 may form a first cell 232, which is a portion of the ice making cell. The first cell 232 may be formed in a hemispherical shape, for example. The first cell wall 231 may form a plurality of first cells 232. The plurality of first cells 232 can be arranged in a direction parallel to an extension direction of a rotation center C1 of the first tray 230. A portion of ice may be formed in the first cell 232.

[0102] FIG. 8 is a view of a first transmission as viewed from one side according to a first embodiment. FIG. 9 is a view of a second transmission as viewed from one side according to a first embodiment.

[0103] Referring to FIGS. 4, 5, 8, and 9, a body 271 of the first transmission 270 may be provided with a connecting portion 272 to which the connector 224 is connected. Although not limited, the connecting portion 272 may be a groove into which the connector 224 is inserted. The first transmission 270 may further include a second extension 276. The second extension 276 may extend in a direction crossing the first extension 274. The second extension 276 may extend radially from the body 271. The second extension 276 may be in contact with a contact portion 295 of the second transmission 290 during a rotation.

[0104] The second transmission 290 may include a shaft hole 292 to which the second shaft 237 is coupled. The shaft hole 292 may be positioned adjacent to one of both ends of the second transmission 290. The second transmission 290 may further include a protrusion hole 293 extending from the shaft hole 292. The protrusion hole 293 may extend radially from the shaft hole 292. The connecting protrusion 238 may be disposed in the protrusion hole 293. Accordingly, the second transmission 290 may be prevented from rotating with respect to the first tray 230 by the shaft hole 292 and the protrusion hole 293. That is, the second transmission 290 may be rotated together with the first tray 230.

[0105] The second transmission 290 may further include the contact portion 295. The contact portion 295 may protrude from the second transmission 290. For example, the contact portion 295 may extend from the second transmission 290 in a direction parallel to a rotation center of the first tray 230. The contact portion 295 may be positioned adjacent to another of both ends of the second transmission 290. A rotation center of the first tray 230 passes through the shaft hole 292. When the contact portion 295 is disposed spaced apart from the shaft hole 292, a moment acting on the second transmission 290 increases, thereby enabling smooth rotation (or twisting) of the first tray 230.

[0106] In the present embodiment, the first tray 230 may be a plastic injection molded product. In this case, in order for ice to be smoothly separated from the first tray 230, the first tray 230 may be twisted. The second tray 240 may also be, for example, a plastic injection molded product. When a rotational force of the second tray 240 is transmitted to the first tray 230 during a rotating of the second tray 240, a twisting force may also be applied to the second tray 240. At this time, the first tray 230 and the second tray 240 may be formed of same material or different materials.

[0107] FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 3.

[0108] Referring to FIGS. 4 and 10, the second tray 240 may include a second cell wall 241. The second cell wall 241 may form a second cell 242, which is another portion of the ice making cell. Another portion of the ice may be formed in the second cell 242. The second cell 242 may be formed in a hemispherical shape, for example. The second cell wall 241 may form a plurality of second cells 242. The plurality of second cells 242 may be arranged in a direction parallel to an extension direction of a rotation center C2 of the second tray 240. In an ice making process, the first cell 232 and the second cell 242 may be arranged in a vertical direction or a left-right direction.

[0109] The second tray 240 may further include a connecting portion 243 through which a rotation center C2 passes. For example, a plurality of connecting portions 243 may be spaced apart from each other. For example, a pair of connecting portions 243 may be disposed between a pair of pressing portions 420. The first transmission 270 may pass through one connecting portion 243 after passing through one pressing portion 420. One end of the transmission shaft 280 may be coupled to the first transmission 270 passing through the one connecting portion 243. The shaft connector 286 may pass through another pressing portion 420 and then pass through another connecting portion 243. In the drawing, the other pressing portion 420 may be positioned at a left side of the one pressing portion 420. In the drawing, the other connecting portion 243 may be positioned on the left side of the one connecting portion 243. Another end of the transmission shaft 280 may be connected to the shaft connector 286 passing through the other connecting portion 243.

[0110] A hole to which the first transmission 270 is coupled may be formed in the one pressing portion 420. A hole to which the first transmission 270 is coupled may also be formed in the one connecting portion 243. Each of the holes may be formed in a shape corresponding to the coupling portion 274 and the protrusion 275 in the first transmission 270. A corresponding portion corresponding to the protrusion 275 in a hole of the connecting portion 243 may be formed greater than the protrusion 275. Accordingly, the protrusion 275 is movable within the corresponding portion. On the other hand, a corresponding portion corresponding to the protrusion 275 in a hole of the one pressing portion 420 may be formed to have a same size as the protrusion 275. By this structure, even when the second tray 240 is moved to an ice making position, an additional rotation of the pressing portion 420 in the corresponding portion is possible by a size difference between the corresponding portion and the protrusion 275.

[0111] FIG. 11 is a drawing showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 12 is a drawing showing a first tray in a twisted state.

[0112] In FIG. 11, for the sake of simplicity, A twisting of the first tray is not shown, and a first tray is shown as rotating.

[0113] Referring to FIGS. 4 to 12, (a) of FIG. 11 shows that a second tray 240 is positioned at an ice making position. After a water supply is completed, an ice making may be performed at an ice making position of the second tray 240. The heater 250 may be operated to generate ice with high transparency in an ice making process. When the heater 250 is operated, ice may be generated from the first tray 230 toward the second tray 240.

[0114] The heater 250 may be turned off before the ice making process is completed. Alternatively, the heater 250 may be maintained in an on state even after the ice making process is completed. In this case, the heater 250 functions as an ice separation heater in an ice separation process.

[0115] In an ice separation process, when the heater 250 operates, heat may be transferred to the first tray 230 and the second tray 240, which may help ice to be separated from the first tray 230 and the second tray 240. Ice may be separated from the first tray 230 and the second tray 240 by heat of the heater 250. Alternatively, a portion of the ice may be separated from the first tray 230 and the second tray 240 by heat of the heater 250, and another portion may be maintained in a state of being attached to the first tray 230 and the second tray 240. However, since heat of the heater 250 is firstly transferred to the second tray 240, there is a high possibility that ice will be completely separated from the second tray 240.

[0116] In an ice separation process, the driver 220 operates so that the first transmission 270 may rotate in a forward direction (a direction of arrow A in FIG. 11). When the first transmission 270 rotates in the forward direction, the second tray 240 also rotates in the forward direction. In a process of the second tray 240 rotating in the forward direction, the first transmission 270 may be in contact with the second transmission 290. For example, the second extension 276 may be in contact with a contact portion 295 of the second transmission 290. As shown in (b) of FIG. 11, in a state in which the first transmission 270 is in contact with the second transmission 290, and as shown in (c) of FIG. 11, the first transmission 270 is additionally rotated in a forward direction, the first tray 230 is rotated in a reverse direction, the first tray 230 may be twisted. As shown in (c) of FIG. 11, when the second tray 240 moves to an ice separation position, a twist amount of the first tray 230 may become maximum. For example, as shown in FIG. 12, as a positional change of another side wall 231b with respect to one side wall 231a of the first cell wall 231 increases, ice may be easily separated from the first tray 230.

[0117] As described above, when the second tray 240 is rotated while the first transmission 270 is in contact with the second transmission 290, a twisting force may also be applied to the second tray 240.

[0118] As shown in (c) of FIG. 11, when the second tray 240 completely moves to an ice separation position or before moving to an ice separation position, ice may be separated from the first tray 230 and fall downward due to a twist of the first tray 230. Even if ice is separated from the first tray 230 but not from the second tray 240, ice may be separated from the second tray 240 due to a twist of the second tray 240.

[0119] Meanwhile, after the second tray 240 is moved to an ice separation position, the second tray 240 may be rotated in a reverse direction (a direction of arrow B in FIG. 11) by the driver 220. Then, the first tray 240 is rotated in a forward direction. While the first tray 240 is rotated in the forward direction, the first transmission 270 and the second transmission 290 are spaced apart from each other. Then, the first tray 230 is stopped in a state in which the first tray is moved to an initial position, and the second tray 240 may be moved to a water supply position or an ice separation position.

[0120] (d) of FIG. 11 illustrates a state in which a pressing portion 420 presses the second tray 240 by an additional rotation of the first transmission 270 in a state in which the second tray 240 is moved to an ice making position.

[0121] According to this embodiment, since an ice making cell is formed by a first tray and a second tray, and a first tray is supported by a bracket, and a second tray may also be supported by a bracket, there is an advantage in that spherical ice may be generated by a simple structure.

[0122] In addition, since a twisting force is applied to each of the first tray and the second tray in an ice separation process, there is an advantage in that ice may be easily separated from the first tray and the second tray. In other words, there is an advantage in that a pusher of a separate structure does not need to be used, and a structure for moving the pusher is unnecessary.

[0123] In addition, since a moving force of the second tray is transmitted to the first tray through a transmission assembly, there is an advantage in that the first tray may be moved using a single driver without multiple drivers.

[0124] In addition, since a single heater without using multiple heaters is operated in an ice making process and an ice separation process, there is an advantage in that a structure is simplified and a heater control is simplified.

[0125] FIG. 13 is a perspective view of an ice maker according to a second embodiment. FIG. 14 is an exploded perspective view of an ice maker of FIG. 13. FIG. 15 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a second embodiment.

[0126] In a second embodiment, differences from a first embodiment will be mainly explained. Therefore, in the description of a second embodiment, even if there is no drawing symbol for a configuration illustrated in the second embodiment or a configuration that is not described in the description according to the second embodiment, for the same configuration as the first embodiment, drawing symbols and descriptions of the first embodiment may be applied identically.

[0127] Referring to FIGS. 13 to 15, an ice maker 201 of the present embodiment may include a first tray 530 and a second tray 540. The first tray 530 may form a first cell, and the second tray 540 may form a second cell. The first cell and the second cell may form an ice making cell.

[0128] In this embodiment, a water supply 411 may be coupled to a bracket 210. A bracket 210 of this embodiment may have the same basic configuration as a bracket 210 of the first embodiment, so a detailed description thereof will be omitted.

[0129] The ice maker 201 may include a transmission assembly. The transmission assembly may include a first transmission 570. The first transmission 570 may be connected to a connector of a driver 220. The first transmission 570 may be connected to the second tray 540. Therefore, the second tray 540 may be rotated together with the first transmission 570.

[0130] The ice maker 201 may further include a transmission shaft 280. The transmission shaft 280 transmits a rotational power of the first transmission 570 connected to one side of the second tray 540 to another side of the second tray 540. The first transmission 570 may be connected to one end of the transmission shaft 280. A shaft connector 586 may be connected to another end of the transmission shaft 280.

[0131] The transmission assembly may further include a second transmission 590 that interacts with the first transmission 570 to transmit a moving force of the second tray 540 to the first tray 530. The second transmission 590 may be integrally formed with the first tray 530 or may be manufactured as a separate component from the first tray 530 and coupled to the first tray 530. FIG. 15 illustrates, as one example, the second transmission 590 being integrally formed with the first tray 530.

[0132] The first tray 530 may include a first shaft 536 and a second shaft 537. A description of a deformable structure for a rotation of the first tray 230 in the first embodiment may be applied to the first tray 530 of the present embodiment as well.

[0133] The first tray 530 may further include a protrusion 539 for twisting. Since a function of the protrusion 539 is the same as that described in the first embodiment, a detailed description thereof will be omitted.

[0134] The first tray 530 may further include the second transmission 590. The second transmission 590 may be spaced apart from the second shaft 537. That is, when the second transmission 590 is positioned spaced apart from the second shaft 537, a moment may be increased. The second transmission 590 may be positioned at an opposite side of the protrusion 539.

[0135] The second tray 540 may include a contact protrusion 546. The contact protrusion 546 may protrude from a side surface of the second tray 540. The contact protrusion 546 may be pressed by the first transmission 570 in a state in which the second tray 540 is moved to an ice making position. That is, in the present embodiment, the first transmission 570 may serve as a pressing portion of the first embodiment.

[0136] The ice maker 201 may further include a heater 550. The ice maker 201 may further include a heater case 560 that supports the heater 550.

[0137] FIG. 16 is a perspective view of a first tray and a first transmission as viewed from one side according to a second embodiment. FIG. 17 is a perspective view of a first tray and a first transmission as viewed from a rear side according to a second embodiment. FIG. 18 is a view of a first tray and a first transmission as viewed from an upper side according to a second embodiment. FIG. 19 is a side view of a first tray and a first transmission according to a second embodiment.

[0138] Referring to FIGS. 15 to 19, the first tray 530 may include a first cell wall 531. A second shaft 537 and a second transmission 590 may be positioned at one side of the first cell wall 531. The first transmission 570 may be positioned at a lower side of the second transmission 590 while being connected to the second tray 540.

[0139] The first transmission 570 may include a body 571. The body 571 may be provided with a connection portion 572 for connection with a connector of the driver 220. The first transmission 570 may further include a first extension 573 extending from the body 571. For example, the first extension 573 may be connected to the second tray 540. Accordingly, the first extension 573 may provide a rotation center of the second tray 540. The first extension 573 may include a protrusion that protrudes in a radial direction.

[0140] The first transmission 570 may include a first portion 574 extending in a direction crossing the first extension 573. The first portion 574 may extend from the body 571 in a radial direction. The first transmission 570 may further include a second portion 574 extending in a direction crossing the first extension 573. In the present embodiment, the first portion 574 and the second portion 575 may be referred to as a second extension. Accordingly, the second extension is a portion that interacts with the second transmission 590 for a rotation of the first tray 530.

[0141] The first portion 574 and the second portion 575 may be spaced apart from each other. For example, the first portion 574 and the second portion 575 may be spaced apart from each other in a circumferential direction of the body 571 (a direction of arrow C in FIG. 19). The first portion 574 may extend from a first point of the body 571. The second portion 575 may extend from a second point spaced apart from the first point in a longitudinal direction of the body 571 (the direction of arrow D in FIG. 18) (or the extension direction of the center of rotation) in the body 571.

[0142] The second transmission 590 may protrude from the first cell wall 531. The second transmission 590 may include a first part 591 protruding from the first cell wall 531. The first part 591 may be in contact with the first portion 574 during a rotation of the first transmission 570. The second transmission 590 may further include a second part 595. The second part 595 may be in contact with the second portion 575 during a rotation of the first transmission 570. For example, the second part 595 may protrude from the first part 591.

[0143] The first portion 574 may include a first cam surface 574a. The first cam surface 574a may be in contact with a portion of the first part 591 during a rotation of the first transmission 570. The first portion 574 may further include a second cam surface 574c. The second cam surface 574c may be in contact with another portion of the first part 591 during a rotation of the first transmission 570. The first cam surface 574a may be formed in a straight shape or may be rounded. In a case in which the first cam surface 574a is rounded, a curvature of the first cam surface 574a may be varied. The second cam surface 574c may be formed in a straight shape or may be rounded. In a case in which the second cam surface 574c is rounded, a curvature of the second cam surface 574c may be varied. A connecting surface 574b of the first cam surface 574a and the second cam surface 574c may be a flat surface or a round surface. At this time, it is also possible that the connecting surface 574b does not exist.

[0144] The first part 591 may include a first contact surface 592. During a rotation of the first transmission 570, a portion of the first portion 574 may be in contact with the first contact surface 592. For example, the first cam surface 574a may be in contact with the first contact surface 592. The connecting surface 574b may also be in contact with the first contact surface 592. The first part 591 may further include a second contact surface 593. During a rotation of the first transmission 570, another portion of the first portion 574 may be in contact with the second contact surface 593. For example, the second cam surface 574c may be in contact with the second contact surface 593. Although not limited, the first contact surface 592 may be a rounded surface. The second contact surface 593 may be an inclined surface. For example, the second contact surface 593 may be inclined with respect to a horizontal plane. The second portion 575 may include a third cam surface 575a. The third cam surface 575a may be in contact with the second part 595 during a rotation of the first transmission 570. The third cam surface 575a may be, for example, a rounded surface. A curvature of the third cam surface 575a may be varied. For example, a curvature of the third cam surface 575a may increase as being away from the body 571.

[0145] In the present embodiment, a moving direction of the first tray 530 may be changed multiple times in an ice separation process by the first portion 574 and the second portion 575. When a moving direction of the first tray 530 is changed multiple times, a twisting force of the first tray 530 may be increased, thereby improving an ice separation performance.

[0146] The first transmission 570 may further include a third portion 577 extending from the body 571. The third portion 577 may be extended in a direction crossing the first extension 573. A pressing protrusion 578 may be formed at an end of the third portion 577. The pressing protrusion 578 may press the contact protrusion 546 of the second tray 570.

[0147] FIG. 20 is a plan view showing a heater installed in a heater case according to a second embodiment. FIG. 21 is a perspective view showing a heater installed in a heater case according to a second embodiment.

[0148] Referring to FIGS. 20 and 21, the heater 550 may be installed in a heater case 560. The heater case 560 may be in contact with the second tray 540. For example, the heater case 560 may be coupled to the second tray 540.

[0149] The heater case 560 may include a supporter 561 formed in a shape corresponding to a second cell of the second tray 540. The heater case 560 may further include an extension 565 extending from an upper portion of the supporter 561.

[0150] The supporter 561 may be formed, for example, in a hemispherical shape. A heater seating groove 562 in which the heater 550 is seated may be formed in the supporter 561. One end of the heater 550 may pass through the extension 565 and be seated on the supporter 561, and another end of the heater 550 may extend from the supporter 561 toward the extension 565.

[0151] For example, the heater 550 may include a first section 551 that extends in a vertical direction (or an arrangement direction of the first tray and the second tray). The heater 550 may further include a second section 552 that extends from the first section 551 in a direction crossing the first section 551. The second section 552 may extend in a horizontal direction with respect to the drawing. The heater 550 may further include a third section 553 extending from the second section 552 in a vertical direction. For example, the third section 553 may extend in a direction away from the first section 551 from the second section 552.

[0152] The heater 550 may further include a fourth section 554 extending in a direction crossing the third section 553 from the third section 553. The fourth section 554 may extend in a horizontal direction with respect to the drawing. The fourth section 554 may be disposed closer to the first tray 530 than the second section 552. A length of the fourth section 554 may be greater than a length of the second section 552. The fourth section 554 may be rounded. The second section 552 may be rounded. A radius of the fourth section 554 may be greater than a radius of the second section 552.

[0153] In an ice separation process, heat of the fourth section 554 may assist in a separation between the first tray 530 and the second tray 540. Heat of the first to third sections may assist in a separation between ice and the second tray 540.

[0154] The heater 550 may further include a fifth section 555 disposed at a boundary portion of a connection portion of two adjacent cells. The first to fourth sections may be arranged sequentially in one cell.

[0155] FIGS. 22 to 24 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 25 is a drawing showing a first tray in a twisted state.

[0156] Referring to FIGS. 22 to 25, an ice making process may be the same as the first embodiment, and therefore, a detailed description thereof will be omitted.

[0157] After an ice making is completed, the first transmission 570 may be moved in a forward direction (A direction) by the driver 220 during an operation of the heater 550 or after an operation of the heater 550 is completed. For example, in a state such as (a) of FIG. 22, the first transmission 570 may be rotated in a forward direction. When the first transmission 570 is rotated, the second tray 540 may be rotated in the forward direction. In a process of the first transmission 570 being rotated in the forward direction, the first portion 574 may be in contact with the first part 575 as shown in (b) of FIG. 22. For example, the first cam surface 574a may be in contact with the first contact surface 592. In this state, if the first transmission 570 is additionally rotated in the forward direction, the first tray 530 may be rotated in the forward direction as shown in (c) of FIG. 22. If the first transmission 570 is additionally rotated in the forward direction as shown in (d) of FIG. 22, the second cam surface 574c may be in contact with the second contact surface 593. In this state, if the first transmission 570 is additionally rotated in the forward direction, the first tray 530 may be rotated in a reverse direction (in a direction of arrow B) again. As shown in (d) of FIG. 22, the first tray 530 may return to an initial position after being rotated in the forward direction.

[0158] Next, as shown in (a) of FIG. 23, when the first transmission 570 is additionally rotated in the forward direction, the second portion 575 may be in contact with the second part 595. In this state, as shown in (b) of FIG. 23, when the first transmission 570 is additionally rotated in the forward direction, the second portion 575 presses the second part 595 downward, so that the first tray 530 rotates in a reverse direction from an initial position. After the second tray 540 moves to an ice separation position, the first transmission 570 rotates in a reverse direction again, as shown in (c) of FIG. 23. During a reverse rotation of the first transmission 570, the first tray 530 rotates in the forward direction.

[0159] If the second part 595 and the second portion 575 are spaced apart from each other during a reverse rotation of the first transmission 570, the first tray 530 stops rotating at an initial position as shown in (d) of FIG. 23. If the first transmission 570 is additionally rotated in the reverse direction, the first portion 574 may be in contact with the first part 591 as shown in (a) of FIG. 24, so that the first tray 530 rotates in the forward direction again. If the first transmission 570 is additionally rotated in the reverse direction, the first portion 574 is spaced apart from the first part 591, so that the first tray 530 stops at an initial position.

[0160] (b) of FIG. 24 illustrates a state in which the second tray 540 is moved to an ice making position, and a pressing protrusion 578 of the third portion 577 presses a contact protrusion 546 of the second tray 240 by an additional rotation of the first transmission 570.

[0161] In the present embodiment, when the second tray 540 moves from an ice making position to an ice separation position in an ice separation process, the first tray 530 is rotated in the forward direction and then rotated in the reverse direction to, for example, stop at an initial position. Then, the first tray 530 is rotated in the reverse direction and then rotated in the forward direction again.

[0162] In addition, when the second tray 540 moves from the ice separation position to a water supply position or an ice separation position in an ice separation process, the first tray 530 rotates in the reverse direction and then stops at, for example, an initial position. Then, the first tray 530 rotates in the reverse direction and then rotates in the forward direction again and stops at the initial position. At this time, before the second tray 540 moves from an ice separation position to a water supply position, the first portion 574 may be spaced apart from the first part 591 so that the first tray 530 may move to an initial position.

[0163] As shown in FIG. 25, as a displacement of the other side wall 531b relative to the one side wall 531a of the first tray 530 increases, a twisting force of the first tray 530 increases, so that ice may be easily separated from the first tray 539.

[0164] According to the present embodiment, since a moving direction of the first tray 530 changes multiple times in an ice separation process, a direction in which a twisting force acts on the first tray 530 changes, so there is an advantage that an ice separation performance can be improved.

[0165] In addition, since a single transmission includes a plurality of spaced portions, there is an advantage in that a moving direction of the first tray 530 may be changed multiple times by a simple structure.

[0166] FIG. 26 is a front view of an ice maker according to a third embodiment. FIG. 27 is an exploded perspective view of an ice maker of FIG. 26. FIG. 28 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a third embodiment.

[0167] In a third embodiment, differences from a first embodiment and a second embodiment will be mainly explained. Therefore, in the description of a third embodiment, even if there is no drawing symbol for a configuration illustrated in the third embodiment or a configuration that is not described in the description according to the third embodiment, for the same configuration as the first embodiment or the second embodiment, drawing symbols and descriptions of the first embodiment or the second embodiment may be applied identically.

[0168] Referring to FIGS. 26 to 28, an ice maker 202 of the present embodiment may also include a first tray 630 and a second tray 640. The first tray 630 may form a first cell, and the second tray 640 may form a second cell. The first cell and the second cell may form an ice making cell.

[0169] In the present embodiment, a water supply 410 may be coupled to a bracket 210. A basic configuration of a bracket 210 of the present embodiment may be the same as that of a bracket 210 of the first embodiment, so a detailed description thereof will be omitted.

[0170] The ice maker 202 may include a transmission assembly. The transmission assembly may include a first transmission 664. A portion of the first transmission 664 may be connected to the second tray 640. The first transmission 644 may include a first portion 665. The first transmission 644 may include a second portion 670 separate from the first portion 665. The second portion 670 may be connected to a connector of a driver 220. The second portion 670 may be connected to the second tray 640.

[0171] The ice maker 202 may further include a transmission shaft 280. The transmission shaft 280 transmits a rotational power of the second portion 670 connected to one side of the second tray 640 to another side of the second tray 640. The second portion 670 may be connected to one end of the transmission shaft 280. A shaft connector 670a may be connected to another end of the transmission shaft 280.

[0172] The transmission assembly may further include a second transmission 690 that interacts with the first transmission 664 to transmit a moving force of the second tray 640 to the first tray 630. The second transmission 690 may be integrally formed with the first tray 630 or may be manufactured as a separate component from the first tray 630 and coupled to the first tray 630. FIG. 28 illustrates, as one example, the second transmission 690 being integrally formed with the first tray 630.

[0173] The ice maker 202 may further include a heater 650. The ice maker 202 may further include a heater case 660 that supports the heater 650. The ice maker 202 may further include a motor supporter 213a on which the driver 220 is installed. The motor supporter 213a may be coupled to the bracket 210.

[0174] The ice maker 202 may further include a stopper 610 in contact with the second tray 640 during a movement of the second tray 640. When the second tray 640 is in contact with the stopper 610 during a movement of the second tray 640, a portion of the second tray 640 is restricted from moving while another portion of the second tray 640 is able to move, so that the second tray 640 may be twisted. By a twisting of the second tray 640, ice may be easily separated from the second tray 640. The stopper 610 may be integrally formed with the bracket 210 or may be coupled to the bracket 210.

[0175] The ice maker 202 may further include a water storage 680. The water storage 680 may store overflowing water when some of water supplied to the ice making cell overflows from the ice making cell. The water storage 680 may be installed, for example, in the second tray 640. The ice maker 202 may further include a fixing portion 688 for fixing the water storage 680 to the second tray 640 in a state in which the water storage 680 is seated on the second tray 640.

[0176] The ice maker 202 may further include a pusher 620 to press the water storage 680 during a movement of the second tray 640. Even if water stored in the water storage 680 changes into ice, ice in the water storage 680 may be separated from the water storage 680 by the pusher 620 pressing the water storage 680. The pusher 620 may be integrally formed with the bracket 210 or may be coupled to the bracket 210.

[0177] FIG. 29 is a perspective view of a first tray and a first transmission viewed from one side according to a third embodiment. FIG. 30 is a perspective view of a first tray and a first transmission viewed from a rear side according to a third embodiment. FIG. 31 is a view of a first tray and a first transmission viewed from a rear side according to a third embodiment. FIG. 32 is a side view of a first tray and a first transmission according to a third embodiment.

[0178] Referring to FIGS. 29 to 32, the first tray 630 may include a first shaft 636 and a second shaft 637. A description of a deformable structure for a rotation of the first tray 230 in the first embodiment may be applied to a first tray 630 of the present embodiment.

[0179] The first tray 630 may further include a protrusion 639 for twisting. Since a function of the protrusion 639 is the same as that described in the first embodiment, a detailed description thereof will be omitted.

[0180] The first tray 630 may further include the second transmission 690. The second transmission 690 may be spaced apart from the second shaft 637. When the second transmission 690 is positioned spaced apart from the second shaft 637, a moment may be increased. The second transmission 690 may be positioned at an opposite side of the protrusion 639. The second transmission 690 may protrude from the first tray 630.

[0181] The second transmission 690 may include a first part 691 that may be in contact with the first portion 665. The second transmission 690 may include a second part 695 that may be in contact with the second portion 670. The second part 695 may protrude from the first part 691.

[0182] The first portion 665 may be provided in the heater case 660. For example, the first portion 665 may be integrally formed with the heater case 660 or may be coupled to the heater case 660.

[0183] The heater case 660 may further include a coupling portion 663 to be coupled with the second portion 670. A portion of the second portion 670 may pass through the coupling portion 663 and be coupled with the second tray 640.

[0184] The first portion 665 may include a first cam surface 665a. The first cam surface 665a may be in contact with a portion of the first part 691 during a rotation of the second tray 640. The first portion 665 may further include a second cam surface 665c. The second cam surface 665c may be in contact with another portion of the first part 691 during a rotation of the second tray 640. The first cam surface 665a may be formed in a straight shape or may be rounded. In a case in which the first cam surface 665a is rounded, a curvature of the first cam surface 665a may be varied. The second cam surface 665c may be formed in a straight shape or may be rounded. In a case in which the second cam surface 665c is rounded, a curvature of the second cam surface 665c may be varied. A connecting surface 665b of the first cam surface 665a and the second cam surface 665c may be a flat surface or a rounded surface. At this time, it is also possible that the connecting surface 665b does not exist.

[0185] The second portion 670 may include a body 671. The body 671 may be provided with a connecting portion 672 for connecting with a connector of the driver 220. The second portion 670 may further include a first extension 673 extending from the body 671. For example, the first extension 673 may be connected to the coupling portion 663 and the second tray 640. Accordingly, the first extension 673 may provide a rotation center of the second tray 640. The first extension 673 may include a protrusion protruding in a radial direction. The second portion 670 may further include a second extension 675 extending in a direction crossing the first extension 673. The second extension 675 is a portion that interacts with the second part 695 for a rotation of the first tray 630.

[0186] The first part 691 may include a first contact surface 691a. During a rotation of the second tray 640, a portion of the first portion 665 may be in contact with the first contact surface 691a. For example, the first cam surface 665a may be in contact with the first contact surface 691a. The connecting surface 665b may also be in contact with the first cam surface 665a. The first part 691 may further include a second contact surface 691b. During a rotation of the second tray 640, another portion of the first portion 665 may be in contact with the second contact surface 691b. For example, the second cam surface 665c may be in contact with the second contact surface 691b. Although not limited, the first contact surface 691a may be a rounded surface. The second contact surface 691b may be an inclined surface. For example, the second contact surface 691b may be inclined with respect to a horizontal plane. The second portion 675 may include a third cam surface 675a. The third cam surface 675a may be in contact with the second part 695 during a rotation of the second tray 640. The third cam surface 675a may be, for example, a rounded surface. Ae curvature of the third cam surface 675a may be varied.

[0187] In the present embodiment, a moving direction of the first tray 630 in an ice separation process may be changed multiple times by the first portion 665 and the second portion 670. When a moving direction of the first tray 630 is changed multiple times, a twisting force of the first tray 630 increases, so that an ice separation performance can be improved.

[0188] In the present embodiment, since the heater case 660 is connected to the second portion 670, when the second portion 670 rotates, the heater case 660 may also be rotated by the second portion 670.

[0189] As described in the first embodiment, if a hole of the coupling portion 663 corresponding to a protrusion formed in a first extension 673 of the second portion 670 is formed greater than the protrusion, the heater case 660 may rotate relative to the second tray 640. With this structure, the heater case 660 may additionally rotate to press the second tray 640 in a state in which the second tray 640 is moved to an ice making position. That is, the heater case 660 itself may serve as a pressing portion described in the first embodiment.

[0190] FIG. 33 is a perspective view of a second tray according to a third embodiment. FIG. 34 is a view showing a state in which a water storage and a fixing portion are coupled with a second tray of FIG. 33.

[0191] Referring to FIGS. 33 and 34, the second tray 640 may include a second cell wall 641. The second cell wall 641 may form a second cell 642. Of course, the first tray 630 may include a first cell wall, and the first cell wall may form a first cell.

[0192] The second tray 640 may include a plurality of spaced connecting portions 646. One of the plurality of connecting portions 646 may be connected to the second portion 670. Another of the plurality of connecting portions 646 may be connected to the shaft connector 670a.

[0193] The second tray 640 may further include a connecting body 647 connecting the plurality of connecting portions 646. The connecting body 647 may be spaced apart from the second cell wall 641 by the plurality of connecting portions 646. The second cell wall 641, the plurality of connecting portions 646, and the connecting body 647 may form a space 648. The water storage 680 may be positioned in the space 648. A portion of the water storage 680 may pass through the space 648, and another portion of the water storage 680 may be seated in at least one of the second cell wall 641, the plurality of connecting portions 646, or the connecting body 647. The water storage 680 may be formed of a deformable material. The water storage 680 may form a storage space 682 to store water.

[0194] The fixing portion 688 may be seated on a perimeter of the water storage 680 in a state in which the water storage 680 is seated on the second tray 640. The fixing portion 688 may be hook-connected to the second tray 640, for example. The second tray 640 may further include a guide slot 643 that guides water overflowing from the ice making cell to flow toward the water storage 680. The guide slot 643 may be disposed at a position adjacent to the water storage 680 in the second tray 640. The guide slot 643 may be formed as a portion of the second cell wall 641 is recessed. Each of the plurality of connecting portions 646 may include a hole 646a through which the second portion 670 passes. The connecting portion 646 may further include a protrusion slot 646b extending from the hole 646a. The protrusion slot 646b may extend from the hole 646a in a radial direction. A protrusion provided in the first extension 673 of the second portion 670 may be positioned in the protrusion slot 646b.

[0195] FIG. 35 is a side view of a heater case according to a third embodiment. FIG. 36 is a perspective view showing a heater seated on a heater case according to a third embodiment.

[0196] Referring to FIG. 36, the heater case 660 may include a supporter 661. The heater 650 may be seated on the supporter 661. The supporter 661 may be in contact with the second tray 640. The supporter 661 may be formed in a shape corresponding to a second cell of the second tray 640. The supporter 661 may be formed in a hemispherical shape, for example. A heater seating groove 662 on which the heater 650 is seated may be formed on the supporter 661.

[0197] The heater case 660 may further include a coupling portion 663 extending from the supporter 661. A plurality of coupling portions 663 may extend from the supporter 661 while being spaced apart from each other. Among the plurality of coupling portions 663, the first portion 665 may be extended from one coupling portion. The one coupling portion is a portion to which the second portion is coupled. Each of the plurality of coupling portions 663 may include a hole 663a through which the second portion 670 passes. Each of the plurality of coupling portions 663 may further include a protrusion slot 663b extending from the hole 663a. The protrusion slot 663b may extend from the hole 663 in a radial direction. A protrusion provided in the first extension 673 of the second portion 670 may be positioned in the protrusion slot 663b.

[0198] The protrusion slot 663b of the heater case 660 may be formed to have a same size as a protrusion of the first extension 673. A protrusion slot 663b of the second tray 640 may be greater than a protrusion of the first extension 673. Accordingly, the heater case 660 may rotate relative to the second tray 640.

[0199] FIG. 37 is a perspective view of a bracket according to a third embodiment.

[0200] Referring to FIG. 27 and FIG. 37, the bracket 210 may further include a supporter coupling portion 616 to which the motor supporter 213a is coupled. The motor supporter 213a may be coupled to the supporter coupling portion 616 by a screw and / or a hook.

[0201] The bracket 210 may further include a first coupling portion 612 to which the stopper 610 is coupled. In a state in which the stopper 610 is coupled to the first coupling portion 612, the stopper 610 may protrude outward from the first coupling portion 612. The bracket 210 may further include a second coupling portion 614 to which the pusher 620 is coupled. Although not limited, a plurality of pushers 620 may be coupled to the bracket 210.

[0202] The stopper 610 may be positioned on a movement trajectory of the second tray 640 while the second tray 640 moves. The stopper 610 may be in into contact with a portion closer to one of both ends of the second tray 640 so as to allow twisting of the second tray 640.

[0203] FIGS. 38 to 40 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed. FIG. 41 is a drawing showing a state in which a second tray is in contact with a stopper. FIG. 42 is a drawing showing a second tray in a twisted state.

[0204] Referring to FIGS. 38 to 42, an ice making process may be the same as the first embodiment, and therefore, a detailed description thereof will be omitted.

[0205] After an ice making is completed, the second portion 670 and the heater case 660 may be moved in a forward direction (A direction) by the driver 220 during an operation of the heater 650 or after an operation of the heater 650 is completed. At this time, the second tray 640 is maintained in a stopped state at an ice making position, as shown in (b) of FIG. 38. If the heater case 660 is additionally rotated in the forward direction, the second tray 640 may be rotated in the forward direction together with the heater case 660. During a rotation of the second tray 640 and the heater case 660 in the forward direction, the first portion 665 may be in contact with the first part 691 as shown in (c) of FIG. 38. For example, the first cam surface 665a may be in contact with the first contact surface 691a. In this state, if the heater case 660 is additionally rotated in the forward direction, the first tray 630 may be rotated in the forward direction as shown in (d) of FIG. 38.

[0206] As shown in (a) of FIG. 39, if the heater case 660 is additionally rotated in the forward direction, the second cam surface 665c may be in contact with the second contact surface 691b. In this state, if the heater case 660 is additionally rotated in the forward direction, the first tray 630 can be rotated in a reverse direction. As shown in (a) of FIG. 39, the first tray 630 may return to an initial position after being rotated in the reverse direction.

[0207] Next, as shown in (b) of FIG. 39, when the second tray 640 is additionally rotated in the forward direction, the second portion 670 may be in contact with the second part 695. In this state, as shown in (c) of FIG. 39, when the second tray 640 is additionally rotated in the forward direction, the second portion 670 presses the second part 695 downward, so that the first tray 630 rotates in the reverse direction from an initial position.

[0208] As shown in FIG. 41, before the second tray 640 reaches an ice separation position, a portion of the second tray 640 may be in contact with the stopper 610. In this state, the second tray 640 may be twisted during a moving of the second tray 640 to the ice separation position. As shown in FIG. 42, as the second tray 640 is twisted and relative positions of one side wall 641a and another side wall 641b of the second tray 640 change, ice may be easily separated from the second tray 640.

[0209] When a reference amount of water is supplied to the ice making cell, ice exists in a spherical shape, so there is a high possibility that ice will be attached to the first tray 630. Ice attached to the first tray 630 may be easily separated from the first tray 630 during a twisting process of the first tray 630.

[0210] On the other hand, if an amount of water less than the reference amount is supplied to the ice making cell, ice is likely to be generated in a hemisphere or a hemisphere-like shape and attached only to the second tray 640. In this case, ice may be separated from the second tray 640 by twisting of the second tray 640.

[0211] After the second tray 640 moves to an ice separation position, the second tray 640 rotates in the reverse direction again as shown in (d) of FIG. 39. During a reverse rotation of the second tray 640, the first tray 630 rotates in the forward direction. When the second part 695 and the second portion 670 are spaced apart from each other during a reverse rotation of the second tray 630, the first tray 630 stops rotating at an initial position as shown in (a) of FIG. 40.

[0212] If the second tray 630 is additionally rotated in the reverse direction, the first portion 665 may be in contact with the first part 691 as shown in (b) of FIG. 40, and the first tray 630 rotates in the forward direction again. If the second tray 630 is additionally rotated in the reverse direction, the first portion 665 is spaced apart from the first part 691, and the first tray 630 stops at an initial position.

[0213] (d) of FIG. 40 illustrates a state in which the heater case 660 presses the second tray 640 by an additional rotation of the heater case 660 in a state in which the second tray 640 is moved to an ice making position.

[0214] In the present embodiment, while the second tray 640 moves from an ice making position to an ice separation position in an ice separation process, the first tray 630 is rotated in the forward direction and then rotated in the reverse direction to, for example, stop at an initial position. Then, the first tray 630 is rotated in the reverse direction and then rotated in the forward direction again.

[0215] In addition, while the second tray 640 moves from the ice separation position to a water supply position or an ice separation position in an ice separation process, the first tray 630 rotates in the reverse direction and then stops at the initial position, for example. Then, the first tray 630 rotates in the reverse direction and then rotates in the forward direction again and stops at the initial position. At this time, before the second tray 640 moves from an ice separation position to a water supply position, the first portion 665 may be spaced apart from the first part 691 so that the first tray 630 may move to an initial position.

[0216] FIG. 43 is a drawing showing relative positions of a pusher and a second tray during an operation of an ice maker according to a third embodiment.

[0217] Referring to b of FIG. 43, at least one of the first tray 630 and the second tray 640 may be provided with a channel CH for a flow of water.

[0218] The channel CH may be formed as a portion of a contact surface of the first tray 630 that contacts the second tray 640 is recessed upward. Alternatively, the channel CH may be formed as a portion of a contact surface of the second tray 640 that contacts the first tray 630 is recessed downward. Alternatively, the channel CH may be formed by being recessed in a contact surface of each of the first tray 630 and the second tray 640. In any cases, the channel CH may be formed in a portion of the second tray 640 adjacent to a rotation center of the second tray 640, or in a portion adjacent to the water storage 680.

[0219] As shown in (a) of FIG. 43, water may be supplied to an ice making cell IC through a water supply 410 at a water supply position. After a water supply is completed, as shown in (b) of FIG. 43, the second tray 640 may be moved to an ice making position. During a process in which the second tray 640 moves from the water supply position to the ice making position or in a state in which the second tray 640 is moved to an ice making position, water in the ice making cell IC may be discharged from the ice making cell IC through the channel CH.

[0220] A water passage WP may be formed between the first tray 630 and the second tray 640. For example, as a portion of the second tray 640 is spaced apart from the first tray 630, the water passage WP may be formed. Alternatively, the water passage WP may be formed by at least one of the first tray 630 or the second tray 640 being recessed.

[0221] Therefore, a portion W1 of water W supplied to the ice making cell IC, may be discharged from the ice making cell IC, flow through the water passage WP, and then be stored in the water storage 680.

[0222] There is a possibility that a reference amount of water may not be supplied to an ice making cell IC during a water supply process due to differences in water pressure in each region, or air existing in a filter or water path after replacing a filter for water purification. A shape of generated ice may vary depending on an actual water supply amount.

[0223] In a case of oversupply, protrusions may exist on an outside of spherical ice, and in a case of insufficient water supply, ice may be formed in a shape that does not form a complete spherical shape.

[0224] In the present embodiment, a reference amount may be set to be greater than an amount theoretically required to generate spherical ice. In this case, since some of the water may be discharged from the ice making cell IC after being supplied to the ice making cell IC, an amount of water present in the ice making cell IC after a water supply is completed may be less than a water supply amount. In the present embodiment, an amount of water in the ice making cell IC after the water supply is completed may be constant regardless of a water supply environment or a replacement of the filter.

[0225] In the ice making cell IC, water may be supplied in a volume less than a volume of the ice making cell IC in consideration of an expansion of water.

[0226] When an ice making is completed, spherical ice may be generated as shown in (c) of FIG. 43. Ice generated in the ice making cell IC may be separated from the ice making cell IC in an ice separation process as described above in FIGS. 38 to 40.

[0227] Meanwhile, water stored in the water storage 680 may be frozen when an ice making process is completed. Ice I1 existing in the water storage 680 may be separated from the water storage 680 by the pusher 620 pressuring the water storage 680 during a process in which the second tray 640 moves to an ice separation position. The pusher 620 may press the water storage 680 by passing through the second tray 640.

[0228] The water storage 680 pressed by the pusher 620 may be deformed, and when spaced apart from the pusher 620, the water storage 680 may be restored to an original shape.

[0229] FIG. 44 is a perspective view of an ice maker according to a fourth embodiment. FIG. 45 is an exploded perspective view of an ice maker of FIG. 44. FIG. 46 is a perspective view showing a first tray and a second tray aligned in a vertical direction according to a fourth embodiment.

[0230] In a fourth embodiment, differences from first to third embodiments will be mainly explained. Therefore, in the description of a fourth embodiment, even if there is no drawing symbol for a configuration illustrated in the fourth embodiment or a configuration that is not described in the description according to the fourth embodiment, for the same configuration as the first to third embodiments, drawing symbols and descriptions of the first to third embodiments may be applied identically.

[0231] Referring to FIGS. 44 to 46, an ice maker 203 of the present embodiment may also include a first tray 730 and a second tray 740. The first tray 730 may form a first cell, and the second tray 740 may form a second cell. The first cell and the second cell may form an ice making cell.

[0232] In the present embodiment, a water supply 410 may be coupled to the bracket 210. A basic configuration of a bracket 210 of the present embodiment may be the same as that of a bracket 210 of the first embodiment, so a detailed description thereof will be omitted.

[0233] The ice maker 203 may include a transmission assembly. The transmission assembly may include a first transmission 770. The first transmission 770 may be connected to a connector of the driver 220. The first transmission 770 may be connected to the second tray 740.

[0234] The ice maker 203 may further include a transmission shaft 280. The transmission shaft 280 transmits a rotational power of the first transmission 770 connected to one side of the second tray 740 to another side of the second tray 740. The first transmission 770 may be connected to one end of the transmission shaft 280. A shaft connector 770a may be connected to another end of the transmission shaft 280.

[0235] The transmission assembly may further include a second transmission 739 that interacts with the first transmission 770 to transmit a moving force of the second tray 740 to the first tray 730. The second transmission 739 may be integrally formed with the first tray 730 or may be manufactured as a separate component from the first tray 730 and coupled to the first tray 730. FIG. 46 illustrates, as one example, the second transmission 739 being integrally formed with the first tray 30.

[0236] The ice maker 203 may further include a motor supporter 213a on which the driver 220 is installed. The motor supporter 213a may be coupled to the bracket 210. The ice maker 203 may further include a heater 750. The ice maker 203 may further include a heater case 760 that supports the heater 750.

[0237] The ice maker 203 may further include an elastic member 768. One end of the elastic member 768 may be connected to the first transmission 770, and another end may be connected to the second tray 740. The elastic member 768 may provide elastic force to the second tray 740 so that the second tray 740 remains in contact with the first tray 730 at an ice making position of the second tray 740.

[0238] FIG. 47 is a perspective view of a first tray and a first transmission viewed from one side according to a fourth embodiment. FIG. 48 is a perspective view of a first tray and a first transmission viewed from a rear side according to a fourth embodiment. FIG. 49 is a view of a first tray and a first transmission viewed from a rear side according to a fourth embodiment. FIG. 50 is a side view of the first tray and the first transmission according to a fourth embodiment.

[0239] Referring to FIGS. 47 to 50, the first tray 730 may include a first shaft 736 and a second shaft 737. A description of a deformable structure for a rotation of the first tray 230 in the first embodiment may be applied to a first tray 730 of the present embodiment.

[0240] The first tray 730 may further include a protrusion 738 for twisting. Since a function of the protrusion 738 is the same as that described in the first embodiment, a detailed description thereof will be omitted.

[0241] The first tray 730 may further include the second transmission 739. The second transmission 739 may be spaced apart from the second shaft 747. That is, when the second transmission 590 is positioned spaced apart from the second shaft 537, a moment may be increased. The second transmission 739 may be positioned at an opposite side of the protrusion 738. The first transmission 770 may be positioned at a lower side of the second transmission 739 while being connected to the second tray 740.

[0242] The first transmission 770 may include a body 771. The body 771 may be provided with a connection portion 772 for connection with the connector. The first transmission 770 may further include a first extension 773 extending from the body 771. For example, the first extension 773 may be connected to the second tray 740. The first extension 773 may include a protrusion that protrudes in a radial direction. The first transmission 770 may include a first portion 774 extending in a direction crossing the first extension 773. The first portion 774 may extend from the body 771 in a radial direction. The first transmission 770 may further include a second portion 775 extending in a direction crossing the first extension 773. In the present embodiment, the first portion 774 and the second portion 775 may be referred to as a second extension. Therefore, the second extension is a portion that interacts with the second transmission 739 for a rotation of the first tray 730. The first portion 774 and the second portion 775 may be spaced apart from each other. A separation direction of the first part 774 and the second part 775 is the same as that described in the second embodiment, so a detailed description will be omitted. The second transmission 739 may protrude from one side wall of the first tray 730.

[0243] The first portion 774 may include a first cam surface 774a. The first cam surface 774a may be in contact with a portion of the second transmission 739 during a rotation of the first transmission 770. The first portion 774 may further include a second cam surface 774c. The second cam surface 774c may be in contact with another portion of the second transmission 739 during a rotation of the first transmission 770. The first cam surface 774a may be formed in a straight shape or may be rounded. In a case in which the first cam surface 774a is rounded, a curvature of the first cam surface 774a may be varied. The second cam surface 774c may be formed in a straight shape or may be rounded. In a case in which the second cam surface 774c is rounded, a curvature of the second cam surface 774c may be varied. The second portion 775 may include a third cam surface 775a. The third cam surface 775a may be in contact with another portion of the second transmission 739 during a rotation of the first transmission 770. The third cam surface 775a may be, for example, a rounded surface. A curvature of the third cam surface 775a may be varied.

[0244] In the present embodiment, a moving direction of the first tray 730 of an ice separation process may be changed multiple times by the first portion and the second portion. When a moving direction of the first tray 730 is changed multiple times, a twisting force of the first tray 730 is increased, so that an ice separation performance can be improved.

[0245] The first transmission 770 may further include a third portion 777 extending from the body 771. The third portion 777 may be extended in a direction crossing the first extension 773. The elastic member 768 may be connected to an end of the third portion 777.

[0246] FIG. 51 is a plan view showing a heater mounted on a heater case according to a fourth embodiment. FIG. 52 is a perspective view showing a heater mounted on a heater case according to a fourth embodiment.

[0247] Referring to FIGS. 51 and 52, a shape of the heater 750 in the present embodiment when the heater 750 is mounted on the heater case 660 is the same as or similar to a shape of a heater 550 described in the second embodiment, and therefore, a detailed description thereof will be omitted.

[0248] The heater case 760 may include a supporter 761 that may be in contact with the second tray 740. The heater case 760 may further include an extension 765 extending from an upper portion of the supporter 761. The supporter 761 may be formed in, for example, a hemispherical shape, but a portion thereof may be cut to form a slot. A heater seating groove 762 in which the heater 750 is seated may be formed in the supporter 761. A hook 767 for coupling with the second tray 740 may be provided in the extension 765.

[0249] FIGS. 53 to 55 are drawings showing relative positions of a first tray and a second tray in an ice separation process after an ice making process is completed.

[0250] Referring to FIGS. 53 to 55, an ice making process may be the same as the first embodiment, so a detailed description thereof will be omitted.

[0251] After an ice making is completed, the first transmission 770 may be moved in a forward direction (A direction) by the driver 220 during an operation of the heater 750 or after an operation of the heater 750 is completed.

[0252] For example, in a state such as (a) of FIG. 53, the first transmission 770 may be rotated in a forward direction. When the first transmission 770 is rotated, the second tray 740 may be rotated in a forward direction. In a process in which the first transmission 770 is rotated in the forward direction, the first portion 774 may be in contact with the second transmission 739, as shown in (b) of FIG. 53. For example, the first cam surface 774a may be in contact with the second transmission 739. In this state, when the first transmission 770 is additionally rotated in the forward direction, the first tray 730 may be rotated in the forward direction, as shown in (c) of FIG. 53.

[0253] As shown in (d) of FIG. 53, if the first transmission 770 is additionally rotated in the forward direction, the second cam surface 774c may be in contact with the second transmission 739. In this state, if the first transmission 770 is additionally rotated in the forward direction, the first tray 730 may be rotated in a reverse direction (in a direction of arrow B) again. As shown in (d) of FIG. 53, the first tray 730 may return to an initial position after being rotated in the forward direction.

[0254] Next, as shown in (a) of FIG. 54, when the first transmission 770 is additionally rotated in the forward direction, the second portion 775 may be in contact with the second transmission 739. In this state, as shown in (b) of FIG. 54, when the first transmission 770 is additionally rotated in the forward direction, the second portion 775 presses the second transmission 739 downward, so that the first tray 730 rotates in a reverse direction from an initial position.

[0255] After the second tray 740 moves to an ice separation position, the first transmission 770 rotates in the reverse direction again as shown in (c) of FIG. 54. During a reverse rotation of the first transmission 770, the first tray 730 rotates in the forward direction. When the second portion 775 and the second transmission 739 are spaced apart from each other during a reverse rotation of the first transmission 770, the first tray 530 stops rotating at an initial position as shown in (d) of FIG. 54.

[0256] If the first transmission 770 is additionally rotated in the reverse direction, the first portion 774 may be in contact with the second transmission 739 as shown in (a) of FIG. 55, so that the first tray 730 rotates in the forward direction again. If the first transmission 770 is additionally rotated in the reverse direction, the first portion 774 is spaced apart from the second transmission 739, so that the first tray 730 stops at an initial position.

[0257] (b) of FIG. 55 illustrates a state in which an elastic force of the elastic member 768 is applied to the second tray 740 by an additional rotation of the first transmission 770 in a state in which the second tray 740 is moved to an ice making position.

[0258] FIG. 56 is a cross-sectional view taken along line 56-56 of FIG. 46. FIG. 57 is a cross-sectional view taken along line 57-57 of FIG. 44. A bracket is omitted in FIG. 57. FIG. 58 is a cross-sectional view taken along line 58-58 of FIG. 46.

[0259] Referring to FIGS. 56 to 58, at least one of the first tray 730 or the second tray 740 may be provided with a channel CH for a flow of water. The channel CH may be formed as a portion of a contact surface of the first tray 730 in contact with the second tray 740 is recessed upward. Alternatively, the channel CH may be formed as a portion of a contact surface of the second tray 740 in contact with the first tray 730 is recessed downward. Alternatively, the channel CH may be formed by a contact surface of each of the first tray 730 and the second tray 740 being recessed. In any cases, the channel Ch may be formed in a portion of the second tray 740 adjacent to a rotation center of the second tray 740.

[0260] A water passage WP may be formed between the first tray 730 and the second tray 740. That is, as a portion of the second tray 740 is spaced apart from the first tray 730, the water passage WP may be formed. Alternatively, the water passage WP may be formed as at least one of the first tray 730 or the second tray 730 is recessed. Accordingly, a portion of water supplied to the ice making cell may be discharged from the ice making cell and flow through the water passage.

[0261] The second tray 740 may further include a water guide 746 that guides flowing water to a separate water storage 800 provided at a lower side of the second tray 740. The second tray 740 may further include a guide slot 744 that guides water overflowing from the ice making cell to flow toward the water guide 746. The guide slot 744 may be disposed at a position adjacent to the water guide 746 in the second tray 740. In the present embodiment, a bottom surface 746a of the water guide 746 may be inclined so that water may smoothly flow to one side.

[0262] In this embodiment, a structure for discharging water from an ice making cell and a technical effectiveness thereof are the same as those described in the third embodiment, so a detailed description thereof will be omitted.

[0263] FIG. 59 is a drawing showing relative positions of a first tray and a second tray in an ice maker according to a fifth embodiment. In a fifth embodiment, differences from first to fourth embodiments will be mainly explained.

[0264] Therefore, in the description of a fifth embodiment, even if there is no drawing symbol for a configuration illustrated in the fifth embodiment or a configuration that is not described in the description according to the fifth embodiment, for the same configuration as the first to fourth embodiments, drawing symbols and descriptions of the first to fourth third embodiments may be applied identically.

[0265] Referring to FIG. 59, an ice maker 204 of the present embodiment may include a first tray 830 and a second tray 840.

[0266] The ice maker 204 may include a transmission assembly. The transmission assembly may include a first transmission 870. The first transmission 870 may be connected to a connector of the driver 220. The first transmission 870 may be connected to the second tray 840. The transmission assembly may further include a second transmission 880 that interacts with the first transmission 870 to transmit a moving force of the second tray 840 to the first tray 830. The second transmission 880 may be integrally formed with the first tray 830 or may be manufactured as a separate component from the first tray 830 and coupled to the first tray 830. FIG. 59 illustrates, as one example, the second transmission 880 being integrally formed with the first tray 730.

[0267] The first transmission 870 may include a body 871. Although not shown, a structure for coupling the body 871 to the second tray 840 may be the same structure as described in the previous embodiments. The first transmission 870 may include a first gear 872 formed on a portion of a circumference of the body 871. The second transmission 880 may be coupled to a shaft 837 of the first tray 830. The shaft 837 may provide a rotation center of the first tray 830. The second transmission 880 may include a second gear 883 engaged with the first gear. For example, the second transmission 880 may include a body 881 coupled to the shaft 837. The second transmission 880 may include an extension 882 extending from the body 881. The extension 882 may extend in a radial direction of the body 881. The second gear 883 may be provided on the extension 882.

[0268] After an ice making is completed, the first transmission 870 may be moved in a forward direction (A direction) by the driver 220 during an operation of the heater or after an operation of the heater is completed. For example, the first transmission 870 may be rotated in the forward direction in a state such as (a) of FIG. 59. When the first transmission 870 is rotated, the second tray 840 may be rotated in a forward direction. In a process in which the first transmission 870 is rotated in the forward direction, the first gear 872 may be connected to the second gear 883 of the second transmission 880 as (b) of FIG. 59. In this state, when the first transmission 870 is additionally rotated in the forward direction, the first tray 830 may be rotated in a reverse direction as (c) of FIG. 59. After the second tray 840 is moved to an ice separation position, the first transmission 870 may be moved in a reverse direction. When the first transmission 870 is rotated in the reverse direction, the second tray 840 may also be rotated in the reverse direction. During a process in which the first transmission 870 moves in the reverse direction, when the first gear 872 is engaged with the second gear 883 of the second transmission 880, the first tray 830 may be rotated in the forward direction. When the first transmission 870 is additionally rotated in the forward direction as shown in (d) of FIG. 59, an engagement between the first gear 872 and the second gear 883 may be released. Then, the first tray 840 is stopped at an initial position, and the second tray 840 may move to a water supply position or an ice making position.

[0269] FIG. 60 is a drawing showing a heater installed in a heater case according to a sixth embodiment. FIG. 61 is a drawing showing a heater installed in a heater case according to a seventh embodiment.

[0270] First, referring to FIG. 60, the heater 850 may be seated on a heater case 860. The heater 850 may include a first section 851. The heater 850 may further include a second section 852 extending from the first section 851 in a direction crossing the first section 851. The first section 851 may extend in a vertical direction. The heater 850 may further include a third section 853 extending from the second section 852 in a direction crossing the second section 852. The third section 853 may extend in a horizontal direction based on the drawing. For one ice making cell, two third sections 853 (or more) may be arranged facing each other. The heater 850 may further include a fourth section 854 extending in a direction crossing the third section 853 from the third section 853. The fourth section 854 may extend in a vertical direction.

[0271] The first section 851 may be positioned closer to the first tray than the third section 853. A length of the first section 851 may be greater than a length of the third section 853. The first section 851 may be rounded. The third section 853 may be rounded. A radius of the first section 851 may be greater than a radius of the third section 851.

[0272] In an ice separation process, heat of the first section 851 may assist in a separation between the first tray and the second tray. Heat of the second to fourth sections may assist in a separation between the ice and the second tray.

[0273] The heater 850 may further include a fifth section 855 positioned at a boundary of two adjacent cells.

[0274] Two or more third sections 853 may be arranged symmetrically for one ice making cell. In this case, a line connecting a plurality of third sections 853 may form a circle.

[0275] Referring to FIG. 61, the heater 860b may be seated on the heater case 860a. A heater 860b of the seventh embodiment may be the same as a heater 860a of the sixth embodiment in its basic form. However, comparing the sixth embodiment and the seventh embodiment, a diameter D1 of a circle formed by a plurality of third sections 853 in the sixth embodiment may be less than a diameter D2 of a circle formed by a plurality of third sections 853a in the seventh embodiment.

[0276] In the case of the sixth embodiment, a diameter D1 of a circle formed by a plurality of third sections 853a may be less than a radius of the first section 851. On the other hand, in the case of the seventh embodiment, a diameter D2 of a circle formed by a plurality of third sections 853a may be equal to or greater than a radius of the first section 851.

[0277] A transparency of a circle formed by a plurality of third sections 853, 853a having a small diameter may be higher than a transparency of a circle formed by a plurality of third sections 853, 853a having a larger diameter. On the other hand, an ice making performance of a circle formed by a plurality of third sections 853, 853a having a lager diameter may be higher than a transparency of a circle formed by a plurality of third sections 853, 853a having a small diameter.

[0278] In another embodiment, ae power of the driver 220 may be directly transmitted to the first tray. For example, the ice maker may include a first transmission to transmit a power of the driver to the first tray and a second transmission to transmit a power of the driver to the second tray.

[0279] Alternatively, the transmission assembly may include a crank and one or more links. Alternatively, the transmission assembly may include a plurality of links.

Claims

1. A refrigerator comprising: a cabinet to form a storage space; a door configured to open and close the storage space; an ice maker provided in the door or the storage space and for generating ice, wherein the ice maker includes a first tray to form a portion of an ice making cell; a second tray to form another portion of the ice making cell and movable relative to the first tray; a driver to provide a power for moving the second tray; and a transmission assembly to transmit a moving power of the second tray or the power of the driver to the first tray to move the first tray during a movement of the second tray.

2. The refrigerator of claim 1, further comprising a bracket that movably supports the first tray.

3. The refrigerator of claim 2, wherein the first tray is rotatably supported by the bracket.

4. The refrigerator of claim 2, wherein the bracket includes a stopper that contacts a portion of the first tray and restricts a movement of a contacted portion.

5. The refrigerator of claim 1, further comprising a stopper that restricts a movement of a portion of the second tray during a movement of the second tray.

6. The refrigerator of claim 1, wherein the transmission assembly includes a first transmission connected to the second tray, and a second transmission connected to the first tray.

7. The refrigerator of claim 6, wherein the driver is connected to the first transmission.

8. The refrigerator of claim 6, wherein the first tray includes a shaft to provide a rotation center, and the second transmission is connected to the shaft.

9. The refrigerator of claim 8, wherein the first transmission includes an extension, and the second transmission includes a contact portion in contact with the extension during a movement of the second tray.

10. The refrigerator of claim 6, wherein the first tray includes a shaft to provide a rotation center, and the second transmission is provided at a position spaced apart from the shaft.

11. The refrigerator of claim 10, wherein the second transmission is integrally formed with the first tray or is coupled to the first tray.

12. The refrigerator of claim 6, further comprising a heater to supply heat to the ice making cell, and a heater case that supports the heater, wherein a portion of the first transmission is provided in the heater case.

13. The refrigerator of claim 12, wherein the first transmission includes a first portion provided in the heater case, and a second portion separated from the first portion and connected to the heater case and the second tray.

14. The refrigerator of claim 6, wherein the first transmission includes: a first cam surface to move the first tray in a forward direction, a second cam surface to move the first tray in a reverse direction, and a third cam surface to further move the first tray in the reverse direction in a state in which the first tray is stopped after moving the first tray in the reverse direction.

15. The refrigerator of claim 1, wherein while the second tray moves in a forward direction, the first tray moves in a reverse direction opposite to the forward direction.

16. The refrigerator of claim 1, wherein the second tray moves from an ice separation position to an ice making position after moving from the ice making position to the ice separation position in a forward direction, during a movement of the second tray from the ice separation position to the ice making position, the first tray is moved by the transmission assembly and then returned to an initial position before the second tray moves to the ice making position.

17. The refrigerator of claim 1, wherein during a movement of the second tray in a forward direction, the first tray moves in the forward direction and then moves in a reverse direction which is an opposite direction to the forward direction.

18. The refrigerator of claim 17, wherein the second tray moves in the forward direction from an ice making position to an ice separation position, before the second tray reaches the ice separation position, the first tray moves in the reverse direction and then returns to an initial position, and then additionally moves in the reverse direction again.

19. The refrigerator of claim 1, further comprising a channel provided in at least one of the first tray or the second tray, a water storage provided in the second tray and to store water overflowing from the ice making cell through the channel, and a pusher to press the water storage during a movement of the second tray to an ice separation position.

20. The refrigerator of claim 1, further comprising a channel provided in at least one of the first tray or the second tray, a water guide to guide water overflowing from the ice making cell through the channel, and a water storage in which water flowing along the guide is stored.

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