Refrigerator

Abstract

This invention relates to a refrigerator. [Solution] An embodiment of the present invention may include a tray having a circumferential surface (or circumferential wall) to which water is supplied, and a motor for driving the tray. The tray may be provided so as to be rotatable and axially connected to the motor. A power transmission device may be included to transmit the driving force of the motor to the tray.

Description

TECHNICAL FIELD

[0001] The present specification relates to a refrigerator.

BACKGROUND ART

[0002] In general, a refrigerator is a home electric appliance that can store food and drinks at a low temperature in an internal storage space shielded by a door. The refrigerator can cool the inside of the storage space using cold air, so that the stored food and drinks can be kept in a refrigerated or frozen state.

[0003] In general, a freezer compartment of a refrigerator is provided with an ice maker for producing ice. The ice maker stores water supplied from a water supply source or a water tank in a tray, and then cools the water to generate ice. The ice generated by the ice maker is stored in an ice bin. For the ice stored in the ice bin, a user can open the freezer compartment door, approach the ice bin, and take out the ice in the ice bin. On the other hand, since ice is formed to be hard, there is a problem that teeth may be damaged when children, the elderly and the physically weak, or consumers with weak teeth chew and eat the ice. Accordingly, there has been a demand from consumers for ice having a relatively low strength that allows it to be chewed and eaten.

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] An embodiment of the present invention aims to provide a refrigerator capable of producing ice having such a strength that consumers can chew and eat the ice.

[0005] An embodiment of the present invention aims to provide a refrigerator that is provided with a tray including a peripheral surface on which ice is generated, and can produce ice with a thin thickness (ice in a first state) by cooling water supplied to the peripheral surface.

[0006] An embodiment of the present invention aims to provide a refrigerator that can produce powdered ice (second state ice) by providing a blade on one side of the tray to separate the thin ice from the circumferential surface.

[0007] The embodiment of the present invention aims to provide a refrigerator capable of compressing the powdered ice to produce molded ice (ice in a third state) having a predetermined strength.

[0008] An embodiment of the present invention aims to provide a refrigerator capable of driving a tray for ice removal and a piston for compressing powdered ice by driving a single drive unit including one motor.

[0009] An embodiment of the present invention aims to provide a refrigerator in which the motor drive can be controlled to sequentially drive the tray for de-ice and drive the piston for compressing the ice powder.

[0010] The embodiment of the present invention aims to provide a refrigerator that facilitates the driving of the tray and the driving of the piston by including a first gear that transmits the driving force of the motor to the tray and a second gear that works in conjunction with the first gear to guide the movement of the rack gear and the piston.

[0011] The embodiment of the present invention aims to provide a refrigerator that facilitates the ice removal operation and the compression operation by having the tray rotate in a first direction (for example, counterclockwise) during the ice removal operation and in a second direction (for example, clockwise) during the compression operation.

[0012] The embodiment of the present invention aims to provide a refrigerator that facilitates the driving of the tray and the driving of the piston by including a drive gear that transmits the driving force of a motor to the tray and a plurality of driven gears that are interlocked with the drive gear.

[0013] The embodiment of the present invention aims to provide a refrigerator that facilitates ice removal and compression operations by having the tray rotate in only one direction (for example, counterclockwise or clockwise) during the ice removal and compression operations.

[0014] The embodiment of the present invention aims to provide a refrigerator in which the tray is made of a material with high thermal conductivity, for example, a metal material, so that the tray is cooled quickly by the supplied cold air.

[0015] The embodiment of the present invention aims to provide a refrigerator in which a space or surface for ice making is formed on a portion of the circumferential surface of the tray (first circumferential surface) so as to improve the ice-making performance in the tray, while a space or surface for ice making is not formed on another portion of the circumferential surface (second circumferential surface).

[0016] In particular, the objective is to provide a refrigerator in which the first circumferential surface of the tray is configured to be in contact with the water in the water tank by forming a first central distance from the center of the tray, and the second circumferential surface of the tray is configured to be in contact with the water in the water tank by forming a second central distance from the center of the tray. In this case, the objective is to provide a refrigerator in which the second central distance is formed to be shorter than the first central distance.

[0017] The embodiment of the present invention aims to provide a refrigerator in which at least one of recesses and protrusions is formed on the circumferential surface of the tray to improve the ice-making performance of the tray, and in which a space or surface for generating ice is formed in at least one of the recesses and protrusions.

[0018] An embodiment of the present invention aims to provide a refrigerator in which tray holes are formed in the tray so as to increase the cooling area of ​​the tray, and in which cold air passages can be formed in the tray holes.

[0019] An embodiment of the present invention aims to provide a refrigerator equipped with a water storage tank, wherein at least a portion of a tray is placed in contact with the water storage tank, thereby enabling a smooth supply of water to the circumferential surface of the tray. [MEANS FOR SOLVING THE PROBLEMS]

[0020] A refrigerator according to an embodiment of the present invention may include a tray having a peripheral surface (or peripheral wall) to which water is supplied, and a motor for driving the tray. However, another liquid other than water may be supplied to the peripheral surface.

[0021] The tray may be provided to be rotatable by being axially connected to the motor.

[0022] A power transmission device that transmits the driving force of the motor to the tray may be included.

[0023] As an example, the power transmission device includes a gear assembly, and the gear assembly may include a first gear connected to a shaft of the motor, and a second gear interlocked with the first gear.

[0024] The motor may include a forward-reverse motor that provides driving force to enable forward and reverse rotation of the first gear.

[0025] The first gear is axially coupled to the tray and can rotate the tray.

[0026] The second gear can interlock with a rack gear for linear movement of a piston.

[0027] The refrigerator includes a cylinder for accommodating ice separated from the peripheral surface of the tray, and the piston may be arranged to be capable of reciprocating motion so as to compress or rejoin the ice accommodated in the cylinder.

[0028] The refrigerator includes a gear lever supported by the first gear, and the gear lever may be rotatably disposed on a protrusion of the first gear.

[0029] During the de-icing operation of the tray, the first gear rotates in a first direction (for example, counterclockwise), and at this time, the first gear and the second gear do not need to be linked.

[0030] During the compression or recombination operation of the piston, the first gear rotates in a second direction (for example, clockwise), and the teeth of the first and second gears may be arranged so that they move in conjunction with each other.

[0031] The second gear includes an interference projection that contacts the gear lever, and when the first gear rotates in a first direction, the gear lever overcomes the interference projection, and then, in the process of the first gear rotating in a second direction, the gear lever pushes the interference projection, thereby initiating the interlocking of the first and second gears.

[0032] As the second gear rotates in a first direction (for example, counterclockwise), the interlocking of the second gear and the rack gear causes the piston to move toward the cylinder, thereby compressing or recombining the ice in the cylinder.

[0033] As the second gear rotates in a second direction (for example, clockwise), the interlocking of the second gear and the rack gear allows the piston to move away from the cylinder.

[0034] As another example, the power transmission device may include a gear assembly which may include a drive gear connected to the shaft of the motor and at least two driven gears that work in conjunction with the drive gear.

[0035] The two driven gears may include a first driven gear and a second driven gear that are interlocked with each other.

[0036] The motor may include a unidirectional motor that provides driving force so that the drive gear can only rotate in one direction (for example, forward rotation).

[0037] The second gear is axially coupled to the tray, allowing the tray to rotate.

[0038] The first gear includes two sub-gears, the first of which can work in conjunction with the first driven gear to guide the compression motion of the piston toward the cylinder. The first sub-gear may be referred to as the "compression gear".

[0039] Of the two sub-gears mentioned above, the second sub-gear can work in conjunction with the second driven gear to guide the return movement of the piston away from the cylinder. The second sub-gear can be referred to as the "return gear".

[0040] The first sub-gear and the second sub-gear are integrally connected to the shaft of the first gear and can be separated in the axial direction.

[0041] The second driven gear can be coupled with a rack gear for the linear movement of the piston.

[0042] The circumferential surface of the tray may include a portion that extends in a rounded shape.

[0043] The circumferential surface of the tray may include portions having an arc shape.

[0044] The circumferential surface of the tray may include portions having a circular shape.

[0045] The tray may include a drum.

[0046] In one aspect of the present invention, a refrigerator may include a cabinet forming a storage compartment, a door for opening and closing the cabinet, a tray rotatably mounted on the door and having a circumferential surface that receives water to generate ice, a cylinder forming a space for containing ice separated from the circumferential surface, and a motor that provides driving force to the tray.

[0047] The refrigerator may include a gear assembly that transmits the driving force of the motor to the tray, and a piston that moves linearly in conjunction with the gear assembly to guide the ice separated from the circumferential surface to the cylinder.

[0048] The refrigerator may include a water tank provided on one side of the tray for storing water to be supplied to the circumferential surface of the tray.

[0049] The refrigerator may include a blade positioned on one side of the cylinder so as to face the circumferential surface and in contact with the ice generated on the circumferential surface.

[0050] The circumferential surface of the tray may include a first circumferential surface that is positioned to receive water supply at a first central distance from the center of the tray, and a second circumferential surface that is positioned to receive water supply at a second central distance smaller than the first central distance.

[0051] The gear assembly may include a first gear connected to the motor and the tray.

[0052] The gear assembly includes a second gear that interlocks with the first gear, and the first and second gears may be configured as incomplete gears, with gear teeth formed only on a portion of their outer surfaces.

[0053] The motor may be a motor that drives in both directions so that the first gear can rotate in a first direction and in a second direction.

[0054] The refrigerator may include a gear lever rotatably supported on the first gear and provided to be in contact with an interference projection on the second gear, and a lever spring having a first end connected to the gear lever and a second end supported on the first gear.

[0055] The gear assembly may include a bracket that supports the gear assembly, the bracket which may include a housing bracket that supports the center of the second gear and a stopper that is inserted into a guide groove of the second gear.

[0056] The refrigerator may include a torsion spring having both ends supported by the second gear and the bracket.

[0057] The gear assembly may include a rack gear that is interlocked with the second gear and connected to the piston.

[0058] The first gear includes a compression gear section and a return gear section arranged in the axial direction, and the compression gear section and the return gear section are connected to a central axis and can rotate together.

[0059] The compression gear section and the return gear section may be configured as incomplete gears, with gear teeth formed only on a portion of their outer circumferential surfaces.

[0060] The motor can be driven in one direction such that it can only rotate in the first direction of the first gear.

[0061] The gear assembly may include a second gear having an axial width greater than the axial width of the compression gear, which is interlocked with the compression gear but not with the return gear, and a third gear which is interlocked with the second gear.

[0062] The third gear can have an axial width greater than the axial width of the return gear, such that it is interlocked with the return gear and not with the compression gear.

[0063] The refrigerator may include a rack gear that is linked to the third gear and connected to the piston.

[0064] In another aspect of the present invention, a refrigerator may include a cabinet forming a storage compartment; a door for opening and closing the cabinet; a tray rotatably mounted on the cabinet or door for receiving a water supply; a blade positioned adjacent to the tray to separate ice formed on the tray; and a cylinder extending tangentially to the outer surface of the tray for containing the ice separated by the blade.

[0065] The refrigerator may include a piston that moves on one side of the cylinder in a direction approaching or away from the cylinder, a motor that generates a driving force for the rotation of the tray, and a gear assembly that transmits the driving force of the motor to the piston.

[0066] The gear assembly may include a first gear connected to the tray and supporting the lever gear, and a second gear that interlocks with the first gear and has a projection that contacts the lever gear.

[0067] The gear assembly may include a first gear connected to the tray and including a compression gear portion and a return gear portion, a second gear that is interlocked with the compression gear portion of the first gear, and a third gear that is interlocked with the return gear portion of the first gear. [Effects of the Invention]

[0068] According to embodiments of the present invention, it is possible to produce ice that has sufficient strength to be chewed and eaten by consumers, thereby improving consumer satisfaction.

[0069] According to an embodiment of the present invention, a tray is provided that includes a circumferential surface on which ice is generated, and by cooling the water supplied to the circumferential surface, a thin layer of ice (ice in a first state) can be easily produced.

[0070] According to an embodiment of the present invention, a blade is provided on one side of the tray to separate the thin ice from the circumferential surface, making it easy to produce powdered ice (ice in a second state).

[0071] According to embodiments of the present invention, the powdered ice can be compressed to easily produce molded ice (ice in a third state) having a predetermined strength.

[0072] According to embodiments of the present invention, a single drive device including one motor can be used to easily drive the tray for ice removal and the piston for compressing the ice powder.

[0073] According to an embodiment of the present invention, the motor drive can be controlled to easily and sequentially drive the tray for ice removal and the piston for compressing the powdered ice.

[0074] According to an embodiment of the present invention, by including a first gear that transmits the driving force of the motor to the tray, and a second gear that works in conjunction with the first gear to guide the movement of the rack gear and the piston, the tray and the piston can be easily driven.

[0075] According to an embodiment of the present invention, the tray rotates in a first direction (for example, counterclockwise) during the de-icing operation and in a second direction (for example, clockwise) during the compression operation, thereby facilitating the de-icing and compression operations.

[0076] According to an embodiment of the present invention, by including a drive gear that transmits the driving force of the motor to the tray and a plurality of driven gears that are interlocked with the drive gear, the tray and the piston can be easily driven.

[0077] According to embodiments of the present invention, the tray rotates in only one direction (for example, counterclockwise or clockwise) during the ice removal and compression operations, thereby facilitating the ice removal and compression operations.

[0078] According to embodiments of the present invention, since the tray is made of a material with high thermal conductivity, such as a metal, the tray can be cooled rapidly by the supplied cold air.

[0079] According to an embodiment of the present invention, a portion of the circumferential surface of the tray (the first circumferential surface) forms a space or surface for ice making, while another portion of the circumferential surface (the second circumferential surface) does not form a space or surface for ice making, thereby improving the ice-making performance of the tray.

[0080] In particular, the ice-making performance of the tray can be improved by ensuring that the first circumferential surface of the tray is in contact with the water in the water tank by forming a first central distance from the center of the tray, and the second circumferential surface of the tray is in contact with the water in the water tank by forming a second central distance smaller than the first central distance from the center of the tray.

[0081] According to embodiments of the present invention, at least one of a recess and a protrusion can be formed on the circumferential surface, and at least one of the recess and protrusion can form a space or surface in which ice is generated, thereby improving the ice-making performance of the tray.

[0082] According to an embodiment of the present invention, tray holes can be formed in the tray, and cold air passages can be formed in the tray holes, thereby increasing the cooling area of ​​the tray.

[0083] According to an embodiment of the present invention, a water storage tank is provided, and the tray is positioned so that at least a portion of it is in contact with the water storage tank, thereby enabling a smooth supply of water to the circumferential surface of the tray. [Brief explanation of the drawing]

[0084] [Figure 1] Figure 1(A) is a front view of a refrigerator according to an embodiment of the present invention, and Figure 1(B) is a drawing showing one door of the refrigerator separated. [Figure 2] Figure 2(A) is a perspective view of the first refrigerator door according to an embodiment of the present invention, viewed from the front, and Figure 2(B) is a perspective view of the first refrigerator door according to an embodiment of the present invention, viewed from the rear. [Figure 3]Figure 3(A) shows a state in which the basket and filter have been separated from the first refrigerator compartment door, and Figure 3(B) shows a state in which the ice-making compartment door and cover member have been separated from the first refrigerator compartment door. [Figure 4] Figure 4 is a diagram showing the configuration of an ice maker and door duct according to an embodiment of the present invention. [Figure 5] Figure 5 is an exploded perspective view showing the configuration of an ice maker and ice maker bracket according to a first embodiment of the present invention. [Figure 6] Figure 6 is a front perspective view showing the configuration of an ice maker according to one embodiment of the present invention. [Figure 7] Figure 7 is a rear perspective view showing the configuration of an ice maker according to the first embodiment of the present invention. [Figure 8] Figure 8 is an exploded perspective view showing the configuration of the ice-making part of an ice maker according to the first embodiment of the present invention. [Figure 9a] Figure 9a is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the water tank when it is in the first position (ice-making position). [Figure 9b] Figure 9b is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the blade when it is in the second position (ice release position). [Figure 9c] Figure 9c is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the water tank when it is in the third position (water supply position). [Figure 10] Figure 10 is an exploded perspective view showing the configuration of the compression part of an ice maker according to a first embodiment of the present invention. [Figure 11] Figure 11 is a perspective view showing the configuration of a transfer pipe and cylinder according to the first embodiment of the present invention. [Figure 12] Figure 12 is a cross-sectional view obtained by cutting along line 12-12 in Figure 11. [Figure 13] Figure 13 is a front view showing a partial configuration of the compression part according to the first embodiment of the present invention. [Figure 14]Figure 14 is a front perspective view showing the configuration of a gear assembly and piston according to a first embodiment of the present invention. [Figure 15] Figure 15 is a rear perspective view showing the configuration of a gear assembly and piston according to a first embodiment of the present invention. [Figure 16a] Figure 16a is a diagram showing how the first gear according to the first embodiment of the present invention rotates in the first direction and the gear lever and the interference projection begin to come into contact. [Figure 16b] Figure 16b is a diagram showing how the first gear according to the first embodiment of the present invention rotates in the first direction and overcomes the gear lever and interference projection. [Figure 16c] Figure 16c is a diagram showing how the first gear, according to the first embodiment of the present invention, rotates in the second direction and works in conjunction with the second gear, causing the piston to move toward the cylinder. [Figure 16d] Figure 16d is a diagram showing how the first gear according to the first embodiment of the present invention rotates in a first direction while being linked with the second gear, causing the piston to move away from the cylinder. [Figure 17a] Figure 17a is a cross-sectional view showing the piston according to the first embodiment of the present invention in a standby position. [Figure 17b] Figure 17b is a cross-sectional view showing the piston according to the first embodiment of the present invention in the compression position. [Figure 18a] Figure 18a is a diagram showing the state of an ice maker when ice is released from a tray according to the first embodiment of the present invention. [Figure 18b] Figure 18b is a diagram showing the state of an ice maker when ice is compressed by a piston according to the first embodiment of the present invention. [Figure 19] Figure 19 is a front left perspective view showing the configuration of an ice maker according to a second embodiment of the present invention. [Figure 20] Figure 20 is a front-right perspective view showing the configuration of an ice maker according to a second embodiment of the present invention. [Figure 21] Figure 21 is a rear perspective view showing the configuration of an ice maker according to a second embodiment of the present invention. [Figure 22]Figure 22 is an exploded view showing the configuration of an ice maker according to a second embodiment of the present invention. [Figure 23] Figure 23 is a front view showing a partial configuration of an ice maker according to a second embodiment of the present invention. [Figure 24] Figure 24 is a drawing showing the configuration of a gear assembly and piston according to a second embodiment of the present invention. [Figure 25] Figure 25 is a front view showing the configuration of a gear assembly according to a second embodiment of the present invention. [Figure 26a] Figure 26a is a diagram illustrating the operation of a gear assembly according to a second embodiment of the present invention. [Figure 26b] Figure 26b is a diagram illustrating the operation of a gear assembly according to a second embodiment of the present invention. [Figure 26c] Figure 26c is a diagram illustrating the operation of a gear assembly according to a second embodiment of the present invention. [Figure 26d] Figure 26d is a diagram illustrating the operation of a gear assembly according to a second embodiment of the present invention. [Figure 27a] Figure 27a is a diagram showing the state of ice removal in a tray according to a second embodiment of the present invention. [Figure 27b] Figure 27b is a diagram showing the compression action of a piston according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0085] Hereinafter, some embodiments of the present invention will be described in detail with reference to illustrative drawings. In assigning reference numerals to the components in each drawing, care has been taken to ensure that identical components have the same reference numeral whenever possible, even if they are shown in other drawings. Furthermore, in describing embodiments of the present invention, if it is determined that a specific description of a related known configuration or function would hinder the understanding of the embodiments of the present invention, such a detailed description will be omitted.

[0086] Furthermore, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. Such terms are merely for distinguishing a component from other components and do not limit the nature, order, or sequence of the component. When it is stated that a component is “connected,” “joined,” or “connected” to another component, it should be understood that the component may be directly connected to or connected to the other components, but that other components may also be “connected,” “joined,” or “connected” between each component.

[0087] On the other hand, in the description of the components of the embodiments of the present invention, the phrase "at least one of components A and B" can be understood to include three types of embodiments: (1) A alone, (2) B alone, and (3) both A and B.

[0088] Furthermore, in the description of the components of the embodiments of the invention, the phrase "at least one of component A or B" can be understood to include three types of embodiments: (1) A alone, (2) B alone, and (3) both A and B. In other words, the phrase "at least one of component A or B" is equivalent to the phrase "at least one of component A and B."

[0089] Figure 1(A) is a front view of a refrigerator according to an embodiment of the present invention, Figure 1(B) is a drawing showing one door of the refrigerator separated, Figure 2(A) is a perspective view of the first refrigerator compartment door according to an embodiment of the present invention as seen from the front, and Figure 2(B) is a perspective view of the first refrigerator compartment door according to an embodiment of the present invention as seen from the rear.

[0090] Figure 3(A) shows a state in which the basket and filter have been separated from the first refrigerator compartment door, and Figure 3(B) shows a state in which the ice-making compartment door and cover member have been separated from the first refrigerator compartment door.

[0091] Referring to Figures 1 to 3, a refrigerator 1 according to an embodiment of the present invention may include a cabinet 10. The cabinet 10 may have a storage compartment. The refrigerator 1 may further include a door for opening and closing the storage compartment. The door may be rotatably or movably connected to the cabinet 10.

[0092] The storage room may include a refrigerator 18. The storage room may optionally or additionally include a freezer 19. As an example, Figure 1(B) shows a storage room that includes a refrigerator 18 and a freezer 19. The refrigerator 18 and the freezer 19 may be separated by a partition wall.

[0093] The door may include refrigerator doors 20, 30 for opening and closing the refrigerator compartment 18. The refrigerator compartment 18 may be opened and closed by one or more refrigerator doors 20, 30. The door may include a freezer door 50 for opening and closing the freezer compartment 19. The freezer compartment 19 may be opened and closed by one or more freezer doors 50.

[0094] In the following explanation, we will describe the case where the refrigerator compartment 18 is opened and closed by the first refrigerator compartment door 20 and the second refrigerator compartment door 30 as an example.

[0095] One or more of the first refrigerator door 20 and the second refrigerator door 30 may include a dispenser 40 for draining water and / or ice. Of course, depending on the type of refrigerator, the freezer door 50 may also be equipped with the dispenser 40.

[0096] At least one of the first refrigerator compartment door 20 and the second refrigerator compartment door 30 may include one or more ice makers 100.

[0097] In the following explanation, we will describe the case in which the ice maker 100 is installed in the first refrigerator compartment door 20 as an example. Of course, it is also possible to install ice makers in the second refrigerator compartment door 30 or the freezer compartment door 50 as needed. In this case, the dispenser 40 and the ice maker may be installed in the same door. Alternatively, additional ice makers may be installed in the refrigerator compartment 18 or the freezer compartment 19.

[0098] Figure 1(B) illustrates that the refrigerator 1 is a bottom-freezer type refrigerator, but it is not limited to this, and the concept of the present invention can be similarly applied to side-by-side type refrigerators and top-mount type refrigerators. In the case of side-by-side type or top-mount type refrigerators, the freezer door may include an ice maker and dispenser, or the refrigerator door may include an ice maker and dispenser.

[0099] The dispenser 40 can be located in front of the first refrigerator door 20. A portion of the dispenser 40 can be recessed backward to provide space in which a container can be placed.

[0100] The dispenser 40 can discharge ice produced by the ice maker 100. At least a portion of the ice maker 100 can be positioned higher than the dispenser 40.

[0101] The first refrigerator compartment door 20 may include an outer case 21. The outer case 21 may form the front exterior. The first refrigerator compartment door 20 may include a door liner 70. The door liner 70 may be directly or indirectly connected to the outer case 21. The door liner 70 can open and close the refrigerator compartment 18.

[0102] With the outer case 21 and the door liner 70 connected, an insulating space may be formed between the outer case 21 and the door liner 70. An insulating material may be provided in the insulating space. The insulating material may be formed by the hardening of a foaming liquid injected from the outside. Alternatively, a vacuum insulating body may be provided in the insulating space. It is also possible for both the insulating material and the vacuum insulating body to be provided in the insulating space.

[0103] The refrigerator 1 may include an ice-making compartment 25 that provides a space for ice to be produced. The ice-making compartment 25 may, for example, be provided in the first refrigerator door 20. The ice maker 100 may be located in the ice-making compartment 25. For example, the door liner 70 may form the ice-making compartment 25. The ice-making compartment 25 may be formed by one side of the door liner 70 being recessed toward the outer case 21.

[0104] The first refrigerator door 20 may further include an ice bin 500 in which ice produced by the ice maker 100 is stored. The ice stored in the ice bin 500 can be discharged to the dispenser 40. The ice bin 500 may be housed in the ice-making compartment 25 together with the ice maker 100. The ice bin 500 may be located below the ice maker 100.

[0105] As an example, the ice-making compartment 25 may be supplied with cold air generated by a cooler. That is, the cooler may be configured to supply cold air to the ice-making compartment 25. Alternatively, the cooler may be configured to operate in order to supply cold air to the ice-making compartment 25. Thus, the ice-making compartment 25 may be cooled by an indirect cooling method using cold air, or as another example, the ice-making compartment 25 may be cooled by a direct cooling method using refrigerant pipes.

[0106] The cooler may be configured to cool the ice-making compartment 25 by including at least one of a refrigerant cycle and a thermoelectric element. For example, cold air for cooling the freezer compartment 19 may be supplied to the ice-making compartment 25.

[0107] The refrigerator 1 may further include a supply channel 16 that guides cold air from the freezer compartment 19 or the space where an evaporator that generates cold air for cooling the freezer compartment 19 is located to the first refrigerator compartment door 20. The refrigerator 1 may also include a discharge channel 17 that guides cold air discharged from the first refrigerator compartment door 20 to the freezer compartment 19 or the space where the evaporator is located. The supply channel 16 and the discharge channel 17 may be provided in the cabinet 10. The cold air circulating in the supply channel 16 and the discharge channel 17 can be flowed by a fan (not shown) located, for example, in the freezer compartment 19 or the space where the evaporator is located.

[0108] A first opening 16a may be formed in the inner wall of the refrigerator compartment 18, forming the end of the supply channel 16. Cold air from the supply channel 16 can be discharged from the supply channel 16 through the first opening 16a. A second opening 17a may be formed in the inner wall of the refrigerator compartment 18, forming the end of the discharge channel 17. Cold air from the supply channel 16 can flow into the discharge channel 16 through the second opening 17a. The first opening 16a and the second opening 17a may be formed in one of the many inner walls of the refrigerator compartment 18.

[0109] The first refrigerator door 20 may include a cold air inlet 75. When the first refrigerator door 20 is closed, the cold air inlet 75 may communicate with the supply passage 16 through the first opening 16a. The first refrigerator door 20 may include a cold air outlet 76. When the first refrigerator door 20 is closed, the cold air outlet 76 may communicate with the discharge passage 17 through the second opening 17a.

[0110] The cold air inlet 75 may be formed on one side of the door liner 70. The one side of the door liner 70 is, but is not limited, the surface facing the inner wall in the refrigerator compartment 18 where the supply passage 16 is located when the first refrigerator compartment door 20 is closed. The cold air outlet 76 may be formed on one side of the door liner 70. The one side of the door liner 70 is, but is not limited, the surface facing the inner wall in the refrigerator compartment 18 where the discharge passage 17 is located when the first refrigerator compartment door 20 is closed.

[0111] One side surface of the door liner 70 may include a first side surface 72 and a second side surface 74 having different widths in the front-rear direction. The front-rear width of the second side surface 74 may be greater than the width of the first side surface 72. One or more of the cold air inlet 75 and the cold air outlet 76 may be formed on the second side surface 74 of the door liner 70. The second side surface 74 may protrude further toward the refrigerator compartment 18 than the first side surface 72.

[0112] The first refrigerator compartment door 20 may include an ice-making compartment door 60 that opens and closes the ice-making compartment 25. The ice-making compartment door 60 may be an insulated door with insulating material inside. The ice-making compartment door 60 may be rotatably connected to the first refrigerator compartment door 20 by a hinge.

[0113] The ice-making compartment door 60 may be equipped with a first basket 62 capable of storing food and beverages. The first refrigerator compartment door 20 may be equipped with a second basket 65. For example, the second basket 65 can be positioned below the first basket 62. The length of the second basket 65 in the front-to-back direction may be shorter than the length of the first basket 62 in the front-to-back direction. The second basket 65 can overlap the dispenser 40 in the front-to-back direction.

[0114] The first refrigerator door 20 may have a component space 63 for housing components. The component space 63 may house one or more of the following: a valve 68 for regulating water flow, a filter (not shown) for purifying water, and a water tank 69 for storing water. The component space 63 may be formed by the door liner 70, or the component space 63 may be formed by a separate wall connected to the door liner 70. The first refrigerator door 20 may include a cover member 64 that covers the component space 63. The component space 63 may be provided with a holder 67 to which the filter is coupled.

[0115] The cover member 64 may include an opening 64a. The filter may be coupled to the holder 67 through the opening 64a. The second basket 65 can cover the opening 64a. When the second basket 65 is separated, the opening 64a can be exposed. The holder 67 can be exposed to the opening 64a.

[0116] Figure 4 is a diagram showing the configuration of an ice maker and door duct according to an embodiment of the present invention.

[0117] Referring together to Figures 3 and 4, the refrigerator door 20 according to an embodiment of the present invention may include an ice-making compartment 25 for housing an ice maker 100. The refrigerator door 20 may include a number of walls 80 that define the ice-making compartment 25.

[0118] The aforementioned number of walls can constitute at least a portion of the door liner 70.

[0119] The plurality of walls may include a lower wall 80a defining the lower part of the ice-making compartment 25, an upper wall 80b defining the upper part of the ice-making compartment 25, and two side walls 81 defining both sides of the ice-making compartment 25. The plurality of walls may further include a front wall 80c defining the front of the ice-making compartment 25.

[0120] The lower wall 80a can form a dispensing section 84 for dispensing ice stored in the ice bin 500 to the dispenser 40.

[0121] The ice maker 100 can be located between the upper wall 80b and the ice bin 500. For example, the ice maker 100 may be positioned adjacent to the upper wall 80b.

[0122] The side wall 81 may be provided with a first duct 90 connected to the cold air inlet 75 to supply cold air to the ice-making compartment 25. For example, the first duct 90 may be embedded in the side wall 81 so as not to be exposed to the ice-making compartment 25. The first duct 90 may extend upward from the cold air inlet 75 to the top of the refrigerator door 20 where the ice maker 100 is located.

[0123] The first duct 90 includes a duct discharge section 91 for discharging cold air, and the cold air discharged from the duct discharge section 91 can flow into the cold air duct 400 of the ice maker 100.

[0124] A supply section 82 for guiding cold air to the cold air duct 400 may be formed in the side wall 81. The duct discharge section 91 may be connected to the supply section 82, and the cold air duct 400 may be connected to the duct discharge section 91 via the supply section 82.

[0125] A return section 83 may be formed in the side wall 81 for sending the cold air from the ice-making compartment 25 to the cold air outlet 76. For example, the return section 83 may be formed at the height where the ice bin 500 is located.

[0126] A second duct 95 may be connected to the return section 83. The second duct 95 may include a duct inlet 96 for introducing cold air discharged through the return section 83. The duct inlet 96 may be connected directly or indirectly to the return section 83. For example, the second duct 95 may be embedded in the side wall 81 so as not to be exposed to the ice-making compartment 25. The second duct 95 may extend downward from the return section 83 to the bottom of the refrigerator door 20 and be connected to the cold air outlet 76.

[0127] The ice maker 100 may include an ice-making part 200 (see Figure 8) that receives a water supply, cools the tray assembly 240 (see Figure 8), and removes the cooled ice.

[0128] The ice maker 100 may include a compression part 300 (see Figure 8) that transfers the ice detached from the tray assembly 240 and recombines or compresses the transferred ice to produce ice in a third state. The ice in the third state may have a predetermined thickness. The ice in the third state corresponds to the inner surface shape of the cylinder 360 or discharge pipe 370 described later, and may, for example, have a cylindrical or polygonal prism shape.

[0129] The ice maker 100 may include a cold air duct 400 that supplies cold air to the ice-making part 200. The cold air duct 400 can be understood as being positioned between the side wall 81 and the tray assembly 240, which will be described later.

[0130] The detailed configuration of the ice maker 100 will be described below with reference to the drawings.

[0131] Figure 5 is an exploded perspective view showing the configuration of an ice maker and ice-making chamber bracket according to the first embodiment of the present invention; Figure 6 is a front perspective view showing the configuration of an ice maker according to the first embodiment of the present invention; Figure 7 is a rear perspective view showing the configuration of an ice maker according to the first embodiment of the present invention; and Figure 8 is an exploded perspective view showing the configuration of the ice-making part of an ice maker according to the first embodiment of the present invention.

[0132] Referring to Figures 5 to 8, the ice maker 100 according to an embodiment of the present invention may be installed in the ice-making compartment 25 of the refrigerator door 20. The refrigerator door 20 may include an ice-making compartment plate 85 that forms at least a portion of the wall 80 of the ice-making compartment 25. The ice-making compartment plate 85 may be configured to include the lower wall 80a and the front wall 80c.

[0133] The ice maker 100 may be supported by the front wall 80c of the ice making chamber 25.

[0134] The ice maker 100 is supported on the upper part of the front wall 80c, and the ice bin 500 can be located below the ice maker 100. The refrigerator door 20 may include a take-out motor (not shown) that provides driving force to discharge the ice stored in the ice bin 500 to the dispenser 40.

[0135] The wall of the ice-making chamber 25 may include a motor housing 86 that surrounds the extraction motor. The extraction motor is connected to a gear assembly located in front of the front wall 80c, and when the gear assembly is driven by the extraction motor, the auger (not shown) of the ice bin 500 is activated and ice is extracted. The front wall 80c may have a through-hole 87 through which a shaft connecting the gear assembly and the ice bin 500 passes. The ice extracted from the ice bin 500 can be discharged to the dispenser 40 via an extraction section 84 of the lower wall 80a.

[0136] The ice maker 100 may include an ice-making part 200, which includes a tray assembly 240.

[0137] The ice-making part 200 may include ice-making brackets 220 and 230 that form cold air passages. A cold air duct 400 is connected to one side of the ice-making brackets 220 and 230, and the cold air supplied through the cold air duct 400 can flow through the cold air passages formed inside the ice-making brackets 220 and 230. The cold air duct 400 may also be defined as the "first cold air duct," and the ice-making brackets 220 and 230 as the "second cold air duct."

[0138] The ice-making brackets 220 and 230 may include a first bracket 220 that forms a housing space for the tray assembly 240. A cold air duct 400 is connected to the first bracket 220, and cold air supplied through the cold air duct 400 can flow into the housing space.

[0139] The cold air duct 400 may include a duct body 410 extending from the side wall 81 toward the ice-making brackets 220 and 230, an inlet 420 formed at one end of the duct body 410 and connected to the supply section 82 of the side wall 81, and an outlet 430 formed at the other end of the duct body 410 and connected to the ice-making brackets 220 and 230 for discharging cold air.

[0140] The ice-making brackets 220 and 230 may include a second bracket 230 connected to the first bracket 220, which together with the first bracket 220 forms a cold air passage. For example, one side of the first bracket 220 may be open, and the open side may be covered by the second bracket 230, forming a cold air passage inside it.

[0141] The internal spaces of the first bracket 220 and the second bracket 230 can form a storage space for the tray assembly 240.

[0142] The ice-making unit 200 may include a water storage tank 250 for storing water. The water storage tank 250 can supply water to the tray assembly 240.

[0143] The first bracket 220 may include a water supply pipe bracket 221c that guides a water supply pipe 120 (see Figure 18a) for supplying water to the water storage tank 250. The water supply pipe bracket 221c may protrude from the first wall 221 of the first bracket 220.

[0144] The water supply pipe bracket 221c includes a water supply pipe connecting portion 221b into which the water supply pipe is inserted, and at least a portion of the water supply pipe may extend into the ice-making brackets 220, 230 via the water supply pipe connecting portion 221b.

[0145] The ice maker 100 may include a motor 310 that provides driving force to move the tray assembly 240.

[0146] The tray assembly 240 may include a tray 241 that receives a water supply and performs ice making. The tray 241 may be provided to be movable by power transmitted from the motor 310. For example, the tray 241 may be provided to be rotatable.

[0147] The tray 241 may include circumferential surfaces 242a and 242b (also called circumferential walls) that form a water storage space. The circumferential surfaces 242a and 242b can be understood to include cells for ice formation.

[0148] As an example, the tray 241 may have the shape of a drum with a circumferential surface. The circumferential surface may form the outer circumferential surface of the drum. That is, the circumferential surfaces 242a and 242b can be understood to extend in the circumferential direction to form the outer circumferential surface of the tray 241.

[0149] From another perspective, the tray 241 may have a disc shape or a plate shape including both side walls and a circumferential surface.

[0150] The circumferential surfaces 242a and 242b may include a first circumferential surface 242a to which water is supplied. The first circumferential surface 242a may form at least a portion of the outer circumferential surface of the tray 241. When the first circumferential surface 242a is positioned facing the water storage tank 250, it may include a surface that comes into contact with the water stored in the water storage tank 250.

[0151] The first circumferential surface 242a may be positioned adjacent to the first blade 280 such that the ice generated on the first circumferential surface 242a comes into contact with the first blade 280.

[0152] The first circumferential surface 242a may include at least one of a first part defining a recessed portion and a second part defining a protruding portion to increase the water contact area (cooling area). The first part may include a recess 241a, and the second part may include a protrusion 241b.

[0153] When the recessed portion of the first circumferential surface 242a is viewed as a reference position, the first circumferential surface 242a can be understood to include the protruding portion 241b, and when the protruding portion of the first circumferential surface 242a is viewed as a reference position, the first circumferential surface 242a can be understood to include the recess 241a.

[0154] The configuration of the recess 241a and the protrusion 241b allows us to understand that the first circumferential surface 242a includes an uneven structure.

[0155] The recesses 241a and protrusions 241b may each be provided in large numbers. The structure may have multiple recesses 241a and multiple protrusions 241b arranged alternately.

[0156] The circumferential surfaces 242a and 242b may include a second circumferential surface 242b connected to the first circumferential surface 242a and not supplied with water. The second circumferential surface 242b may include a surface that does not come into contact with the water stored in the water storage tank 250 when it is positioned facing the water storage tank 250.

[0157] The second circumferential surface 242b may be positioned relatively far away from the first blade 280 so that the ice generated on the second circumferential surface 242b does not come into contact with the first blade 280.

[0158] The distance from the center of the tray 241 to the second circumferential surface 242b (second center distance, D2) may be formed to be smaller than the distance from the center of the tray 241 to the first circumferential surface 242a (first center distance, D1). For example, the second circumferential surface 242b may have a shape that is cut out from the edge of the first circumferential surface 242a in a direction toward the center of the tray 241.

[0159] When the first circumferential surface 242a is in a position where it comes into contact with cold air and freezes, the second circumferential surface 242b is positioned to face the water storage tank 250. In this case, the second circumferential surface 242b does not come into contact with the water in the water storage tank 250, so the water storage tank 250 is not cooled by the tray 241 which forms a low temperature. Therefore, it is possible to prevent the water stored in the water storage tank 250 from freezing.

[0160] The tray 241 may include side walls 244 (also called sides). The side walls 244 may include portions that extend radially from the tray 241. Multiple side walls 244 may be provided, for example, two, to form both sides of the circumferential surfaces 242a, 242b.

[0161] The tray 241 may include an inner circumferential wall 244a connected to the side wall 244. The inner circumferential wall 244a can be understood to form the inner circumferential surface of the tray 241 and may include the opposite side of the circumferential surfaces 242a and 242b with respect to the side wall 244.

[0162] The tray 241 may include a central bracket 243 that forms the center (or central axis) of the tray 241. The central bracket 243 may protrude from both sides of the tray 241 in the axial direction.

[0163] The center bracket 243 may be coupled to the first gear 330 of the compression part 300. For example, the center bracket 243 may include an insertion hole 2431 into which the center bracket 331 of the first gear 330 is inserted.

[0164] The tray 241 may include extension walls 243a extending from the central bracket 243 toward the side wall 244 on the first circumferential surface 242a side. For example, the extension walls 243a may extend radially from the central bracket 243. A plurality of extension walls 243a may be provided, and the plurality of extension walls 243a may be spaced apart from each other and arranged circumferentially.

[0165] The side wall 244 on the second circumferential surface 242b side has a semicircular shape and may be connected to the extension wall 243a on the first circumferential surface 242a side.

[0166] The terms are defined in terms of direction. Throughout the specification, "axial direction" may mean the direction in which the shaft of the motor 310 extends, and "radial direction" may mean the direction toward the radius intersecting the axial direction.

[0167] The tray 241 can form tray holes 245. The tray holes 245 can be understood as holes that penetrate the tray 241 in the axial direction. Cold air can flow through the tray holes 245, increasing the cooling area of ​​the tray 241.

[0168] The tray hole 245 can be understood as a space defined by the central bracket 243 and a number of extension walls 243a and inner circumferential walls 244a. A number of tray holes 245 may be formed, and the number of tray holes 245 may be arranged in the circumferential direction of the tray 241.

[0169] The tray assembly 240 may include tray covers 246, 247 connected to the tray 241. The tray covers 246, 247 may be provided on the side walls 244 of the tray 241.

[0170] The tray covers 246 and 247 are arranged to cover at least one side of the tray 241 and can function to prevent water from the water tank 250 from flowing into the tray holes 245 of the tray 241.

[0171] The tray covers 246 and 247 may be made of a material with low thermal conductivity so as to limit ice formation. As an example, the material with low thermal conductivity may be a non-metallic material. Plastic material can be proposed as an example of the non-metallic material.

[0172] The tray covers 246 and 247 may include a first tray cover 246 provided on one side wall 244 of the tray 241 and a second tray cover 247 provided on the other side wall 244 of the tray 241.

[0173] The first and second tray covers 246 and 247 can have shapes that correspond to the shape of the tray 241. For example, the first and second tray covers 246 and 247 can each include portions that can cover the side walls 244, a number of extension walls 243a, and inner circumferential walls 244a of the tray 241.

[0174] The first and second tray covers 246 and 247 may each include corresponding cover penetrations connected to tray holes 245 of tray 241. Cold air can pass through the cover penetrations of the first and second tray covers 246 and 247 and the tray holes 245 of tray 241.

[0175] Let me explain from a different perspective.

[0176] The first tray cover 246 and the second tray cover 247 can be understood as components of a "tray" in a broad sense. In this case, the tray assembly 240 can be referred to as a "tray," and the tray 241 as a "tray part," and the first and second tray covers 246 and 247 can constitute a part of the tray 240.

[0177] Another embodiment will be described. The first and second tray covers 246 and 247 described above may not be provided, and the tray assembly 240 may be configured to include only the tray 241.

[0178] The ice-making part 200 may include a first bracket 220 that forms the first storage space 220a of the tray assembly 240.

[0179] The first bracket 220 may include a first wall 221 supported by the ice-making compartment plate 85. The first wall 221 can be understood as a wall that shields at least a portion of one side of the tray assembly 240.

[0180] In another view, the first wall 221 may be positioned to support the tray 241. The first wall 221 may include an insertion hole 221a into which at least a portion of the tray 241 is inserted to support the tray 241. For example, the center bracket 243 of the tray 241 may be rotatably inserted into the insertion hole 221a and coupled to the first gear 330 of the compression part 300.

[0181] The first bracket 220 may include a rotating guide rib 221d provided on the first wall 221 and positioned to surround the insertion hole 221a. The rotating guide rib 221d is formed circumferentially and can project from the first wall 221 toward the tray assembly 240.

[0182] At least a portion of the tray assembly 240 may be supported by the rotation guide rib 221d. For example, the second tray cover 247 may include a protruding rib that projects toward the first wall 221. The protruding rib may have a shape corresponding to the rotation guide rib 221d and may be rotatably supported on the inner surface of the rotation guide rib 221d when the tray assembly 240 is rotated.

[0183] The first wall 221 can form at least a portion of a wall that guides the flow of cold air that enters through the cold air duct 400.

[0184] The ice-making part 200 may include a second wall 222 connected to the first wall 221. The second wall 222 may be connected to an end of the first wall 221, for example, the upper end, and may project toward the second bracket 230. The second wall 222 may form the upper end of the ice-making part 200.

[0185] The ice-making part 200 may include a third wall 223 connected to the first wall 221. The third wall 223 may be connected to an end of the first wall 221, for example, its lower end, and may project toward the second bracket 230. The third wall 223 may form the lower end of the ice-making part 200.

[0186] The ice-making part 200 may include a fourth wall 224 and a fifth wall 225 connected to the third wall 223. The fourth wall 224 may be connected to one side of the third wall 223, and the fifth wall 225 may be connected to the other side of the third wall 224. For example, the fourth wall 224 and the fifth wall 225 may protrude from both ends of the third wall 223.

[0187] The ice-making unit 200 may include a second storage space in which a water tank 250 is placed. The second storage space can be understood as the space defined by the third wall 223, the fourth wall 224, and the fifth wall 225. The second storage space may be formed below the first storage space in which the tray assembly 240 is located.

[0188] The water storage tank 250 includes a case having a predetermined capacity, and the wall of the case may be provided with a water storage tank heater 255 that provides heat to prevent the water stored in the water storage tank 250 from freezing. The water discharged from the water supply pipe can flow slowly along the inclined surface of the fourth wall 224 and into the water storage tank 250.

[0189] The ice-making part 200 may include a first blade 280 that contacts the ice made in the tray 241 to separate the ice made in the tray 241. The first blade 280 may be positioned adjacent to the rotation path of the tray 241. In particular, the first blade 280 may be positioned adjacent to the first circumferential surface 242a when the tray 241 rotates.

[0190] The first blade 280 may be provided on the fifth wall 225. For example, a water tank 250 may be located on the inner surface of the fifth wall 225, and the first blade 280 may be coupled to the outer surface of the fifth wall 225.

[0191] The ice-making part 200 may include a second blade 285 that comes into contact with the frozen ice in order to separate the ice formed in the tray assembly 240.

[0192] The second blade 285 may be positioned adjacent to the side walls of the tray assembly 240 so as to scrape off ice that has frozen onto the side walls of the tray assembly 240, i.e., the first tray cover 246 and the second tray cover 247.

[0193] Multiple second blades 285 may be provided, and one of the second blades 285 may be placed on the first wall 221. Another second blade 285 may be placed on the bracket wall 231 of the second bracket 230.

[0194] As the tray assembly 240 rotates, any ice that comes into contact with the second blade 285 is separated from the tray assembly 240, and the separated ice can flow into the water storage tank 250.

[0195] A cold air passage may be formed inside the first bracket 220 through which cold air flowing in from the cold air duct 400 flows. At least a portion of the cold air passage may be formed in the first containment space 220a.

[0196] The first bracket 220 may include a first opening 224b to which the cold air duct 400 is connected, forming a cold air inlet. The first opening 224b may be formed in the fourth wall 224 of the first bracket 220. The cold air duct 400 may be connected to the first opening 224b.

[0197] The first opening 224b and the water tank 250 can be located on opposite sides of the tray 241 with respect to its center. For example, the first opening 224b may be formed at a higher position than the center of the tray 241, and the water tank 250 may be positioned at a lower position than the center of the tray 241. With such a configuration, cold air flowing in through the first opening 224b is prevented from flowing directly into the water tank 250.

[0198] The ice-making part 200 may include a guide wall 226 positioned to guide cold air towards the circumferential surfaces 242a and 242b of the tray 241. The guide wall 226 may be provided on the first wall 221 and may be formed in a rounded shape corresponding to the curvature of the circumferential surfaces 242a and 242b.

[0199] The first portion of the guide wall 226 may be connected to the first wall 221, and the second portion may be connected to the second wall 222.

[0200] The guide wall 226 and the first opening 224b can be positioned on opposite sides of the tray 241 with respect to its center. Therefore, the air supplied to the outer circumferential surface of the tray 241 through the first opening 224b is guided by the guide wall 226 located opposite the first opening 224b, making it easy to form a cold air flow along the outer circumferential surface of the tray 241.

[0201] The first bracket 220 may include a sixth wall 226a projecting from the first wall 221 toward the ice-making plate 85, i.e., toward the front of the refrigerator. The sixth wall 226a can support the side of a motor 310 which is installed on the back surface of the first wall 221. The back surface of the first wall 221 can be understood as the opposite side on which the tray assembly 240 is installed.

[0202] The sixth wall 226a includes a fastening hole 228 that connects to the ice-making plate 85, and a predetermined fastening member may pass through the fastening hole 228 and be fastened to the ice-making plate 85.

[0203] The first bracket 220 may include a seventh wall 226b that extends downward from the first wall 221 and supports the cutter wall 395. The cutter wall 395 is a component that cuts ice discharged from the cylinder 380, and the ice cut by the cutter wall 395 can fall into the ice bin 500. The cutter wall 395 may be located below the cylinder 380.

[0204] The second bracket 230 may include a bracket wall 231 that shields one open side of the first bracket 220. The bracket wall 231 can form at least one surface of the cold air passage formed inside the ice-making brackets 220 and 230.

[0205] The bracket wall 231 may include a through-hole 233 through which the central bracket 243 of the tray assembly 240 is supported. That is, a first portion of the central bracket 243 that protrudes toward the compression part 300 may be coupled to the first gear 330 of the compression part 300, and a second portion that protrudes toward the second bracket 230 may be inserted into and supported by the through-hole 233.

[0206] The second bracket 230 may include a blade bracket 235 positioned on the bracket wall 231 and on which the second blade 285 is mounted. The blade bracket 235 is positioned through the bracket wall 231, and the second blade 285 can be mounted on the blade bracket 235 and project toward the side wall of the tray assembly 240, for example toward the first tray cover 246.

[0207] Figure 9a is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the water tank when it is in the first position (ice making position), Figure 9b is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the blade when it is in the second position (ice release position), and Figure 9c is a diagram showing the relative arrangement of the tray assembly according to the first embodiment of the present invention with respect to the water tank when it is in the third position (water supply position).

[0208] The operation of the tray assembly 240 will be described with reference to Figures 9a to 9c. First, referring to Figure 9a, the tray assembly 240 can be positioned in the ice-making position based on the drive of the motor 310. In the ice-making position, the first circumferential surface 242a of the tray 241 can be positioned on both sides of the upper part of the water tank 250 without contacting the water tank 250.

[0209] The second circumferential surface 242b can be separated by a set distance S1 from the upper end of the water storage tank 250 or the maximum water level position of the water storage tank 250 so as not to come into contact with the water in the water storage tank 250. Therefore, since the tray assembly 240 does not come into contact with the water in the water storage tank 250 at the ice-making position, it is possible to prevent the water in the water storage tank 250 from freezing or the heat at room temperature of the water storage tank 250 from being transferred to the tray assembly 240.

[0210] At the ice-making location, the water supplied to the first circumferential surface 242a by the cold air supplied through the cold air duct 400 can be cooled and undergo a phase change to a thin ice state. The state of ice cooled on the first circumferential surface 242a can be referred to as the "first state". The ice in the first state may be formed at a predetermined height on the surface of the recess 241a and protrusion 241b provided on the first circumferential surface 242a. The ice in the first state can be understood as ice having a thin layer.

[0211] Once the set time has elapsed in the ice-making position, the motor 310 is driven, allowing the tray assembly 240 to rotate. As an example, as shown in Figure 9a, the tray assembly 240 can rotate in a counterclockwise direction.

[0212] During the rotation of the tray assembly 240, when the first circumferential surface 242a is in the position of the first blade 280, the first blade 280 can come into contact with the ice formed on the first circumferential surface 242a. During this contact process, the ice is separated from the first circumferential surface 242a and released.

[0213] The detached ice can flow into the compression section 300, particularly the transfer pipe 370. The detached ice has the form of powdered ice, and this state of ice I1 can be referred to as the "second state".

[0214] As the tray assembly 240 rotates further from the state shown in Figure 9b, the first circumferential surface 242a will pass through the water supply position as shown in Figure 9c while rotating. Water can be supplied to the first circumferential surface 242a as it passes through the water supply position.

[0215] More specifically, when the tray assembly 240 rotates counterclockwise from the position shown in Figure 9a, the first circumferential surface 242a undergoes de-icing at the position shown in Figure 9b, and the de-iced first circumferential surface 242a moves to the position shown in Figure 9c. At this time, the first circumferential surface 242a comes into contact with the water in the water tank 250. The water that comes into contact with the first circumferential surface 242a may remain on the first circumferential surface 242a due to surface tension.

[0216] After water is supplied to the first circumferential surface 242a, the tray assembly 240 rotates further, returning to the position shown in Figure 9a, and the ice-making operation can be performed again.

[0217] Figure 10 is an exploded perspective view showing the configuration of the compression part of an ice maker according to the first embodiment of the present invention; Figure 11 is a perspective view showing the configuration of the transfer pipe and cylinder according to the first embodiment of the present invention; Figure 12 is a cross-sectional view cut along line 12-12 in Figure 11; Figure 13 is a front view showing a partial configuration of the compression part according to the first embodiment of the present invention; Figure 14 is a forward perspective view showing the configuration of the gear assembly and piston according to the first embodiment of the present invention; and Figure 15 is a rear perspective view showing the configuration of the gear assembly and piston according to the first embodiment of the present invention.

[0218] Referring to Figures 10 to 15, an ice maker 100 according to an embodiment of the present invention may include a compression part 300 including a piston 365 to compress or recombine ice separated from the tray assembly 240. The piston 365 can be moved by the drive of the motor 310.

[0219] The compression part 300 may include a first bracket 320 connected to the motor 310. The first bracket 320 may support components of the compression part 300 and may include an open end.

[0220] The open end can be shielded by the first wall 221 of the first bracket 220 of the ice-making part 200. That is, the first bracket 320 and the first bracket 220 of the ice-making part 200 can form a space in which the components of the compression part 300 are installed.

[0221] The first bracket 320 may include a first wall 321 that forms a through hole 321a into which the motor shaft 312 of the motor 310 is inserted. The motor shaft 312 may be coupled to the center (or central axis) of the first gear 330, i.e., the central bracket 331, via the through hole 321a.

[0222] The compression part 300 may include a power transmission device for transmitting the driving force of the motor 310 to the piston 365. The power transmission device may include a gear assembly.

[0223] The gear assembly may include a first gear 330 as a drive gear that is coupled to and rotates on the motor shaft 312. The first gear 330 may include a first gear body 330a having an outer circumferential surface that forms a first gear portion 333.

[0224] The first gear 330 includes a central bracket 331 that forms a central part, and the central bracket 331 can protrude from a first surface of the first gear body 330a in a direction toward the tray assembly 240.

[0225] A shaft groove 336 may be formed on the second surface of the first gear body 330a, to which the motor shaft 312 is coupled. The second surface may form the back surface of the first surface.

[0226] The first gear 330 may include a lever projection 334 positioned radially away from the central bracket 331. The lever projection 334 may protrude from the first gear 330, and a gear lever 350 may be rotatably connected to the lever projection 334.

[0227] The gear lever 350 may include a lever body 351 that forms an insertion hole 352 into which the lever projection 334 is inserted. The lever body 351 can rotate about the lever projection 334.

[0228] The gear lever 350 may include a first part 354 forming a first end of the lever body 351 and a second part 355 forming a second end. The first part 354 may extend in one direction from the insertion hole 352, and the second part 355 may extend in the other direction from the insertion hole 352.

[0229] The first gear 330 may include an outer circumferential surface on which the first gear portion 333 is arranged. The first gear portion 333 may include multiple gear teeth. The first gear portion 333 may be provided only on a portion of the outer circumferential surface of the first gear 330, rather than on the entire outer circumferential surface. That is, the first gear portion 333 can form an incomplete gear portion. For example, the first gear portion 333 may be provided only in a region that forms a central angle of approximately 90 degrees with respect to the center of the first gear 330.

[0230] The second part 355 may be positioned to protrude radially beyond the gear portion 333 of the first gear 330. Therefore, even if there is no interlocking between the first and second gears 330 and 340 when the portion of the first gear 330 that does not have a gear portion rotates opposite the second gear 340, the second part 355 can come into contact with a portion of the second gear 340, for example, the interference projection 345.

[0231] The compression part 300 may include a lever spring 337 connected to the gear lever 350. The lever spring 337 may be connected to the first part 354 to elastically support the gear lever 350. As an example, the lever spring 337 may include a tension spring.

[0232] The first gear 330 may include a spring projection 335 to which the lever spring 337 is connected. The spring projection 335 may protrude from the first gear 330 and be positioned radially away from the center bracket 331. The spring projection 335 and the lever projection 334 may be positioned circumferentially separated from each other.

[0233] One end of the lever spring 337 may be connected to the gear lever 350, and the other end of the lever spring 337 may be connected to the spring projection 335.

[0234] The gear assembly may include a second gear 340 as a driven gear that interlocks with the first gear 330. The second gear 340 may include a second gear body 340a having an outer circumferential surface that forms a second gear portion 343.

[0235] The second gear 340 may include a central bracket 342 that forms a central part (or central axis). The central bracket 342 may be rotatably supported in a housing bracket 323 of the first bracket 320. The housing bracket 323 includes a housing groove, into which the central bracket 342 can be inserted.

[0236] The second gear 340 may include an outer circumferential surface on which the second gear portion 343 is arranged. The second gear portion 343 may include multiple gear teeth. The second gear portion 343 may be provided only on a portion of the outer circumferential surface of the second gear 340, rather than on the entire outer circumferential surface. That is, the second gear portion 343 can form an incomplete gear portion. For example, the second gear portion 343 may be provided only in a region that forms a central angle of approximately 270 degrees with respect to the center of the second gear 340.

[0237] The second gear 340 is positioned radially away from the central bracket 342 and may include a first projection 349 that supports one end of the gear spring 348. The first projection 349 may protrude from the second gear 340 toward the first bracket 320.

[0238] The gear spring 348 is a component that provides a restoring force to guide the rotation of the second gear 340 in one direction, and may include a torsion spring as an example.

[0239] The other end of the gear spring 348 may be supported by the second projection 329 of the first bracket 320. The second projection 329 can protrude from the first bracket 320 in a direction toward the second gear 340.

[0240] The first bracket 320 may include a stopper 325 for setting a rotational limit for the second gear 340. The stopper 325 may protrude from the first bracket 320 toward the second gear 340 and be inserted into a guide groove 346 of the second gear 340.

[0241] The guide groove 346 may have an arc shape and be formed in the circumferential direction with a predetermined center distance from the center bracket 342.

[0242] As the second gear 340 rotates, the stopper 325 moves along the guide groove 346, and when it comes into contact with the end of the guide groove 346, it restricts further rotation of the second gear 340.

[0243] The second gear 340 may include an interference projection 345 positioned radially away from the central bracket 342. The interference projection 345 may protrude from the second gear 340 toward the tray assembly 240.

[0244] The interference projection 345 is the part that contacts the gear lever 350 when the first gear 330 rotates, and when the gear lever 350 pushes up the interference projection 345, the second gear 340 can start rotating and move in conjunction with the first gear 330. In other words, the interference projection 345 may be a part that interferes with the gear lever 350 of the first gear 330 so that the second gear 340 starts moving in conjunction with the first gear 330.

[0245] The compression part 300 may include a rack gear 360 that is interlocked with the second gear 340. The rack gear 360 extends tangentially to the second gear 340 and can move upward or downward in response to the rotation of the second gear 340.

[0246] Here, "upward" may refer to a direction away from the ground on which the refrigerator cabinet is installed, with the ground being the reference point. Conversely, "downward" can be understood as a direction closer to the ground.

[0247] The rack gear 360 may include a number of gear teeth 362 that interlock with the second gear portion 343 of the second gear 340. The number of gear teeth 362 may be arranged in a linear direction.

[0248] The first bracket 320 may include a rail groove 326 that guides the linear movement of the rack gear 360. The rail groove 326 may be formed on the side of the rack gear 360 and may be elongated in the vertical direction of the first bracket 320.

[0249] The rack gear 360 may include a rail 364 that is inserted into and moves within the rail groove 326. For example, the rail 364 may be located at the side end of the rack gear 360.

[0250] The compression part 300 may include a piston bracket 363 connecting the rack gear 360 and the piston 365. The piston bracket 363 may be provided at the upper end of the rack gear 360, and the piston 365 may be positioned to extend downward from the piston bracket 363. The piston 365 and the rack gear 360 can move together as a single unit.

[0251] When the second gear 340 rotates in a first direction (for example, the counterclockwise direction based on Figure 13), the rack gear 360 and piston 365 can move in a direction toward the cylinder 380. Conversely, when the second gear 340 rotates in a second direction (for example, the clockwise direction based on Figure 13), the rack gear 360 and piston 365 can move toward the cylinder 380.

[0252] The compression part 300 may include a cylinder 380 that defines a space for the movement of ice (powdered ice) produced in the ice-making part 200. The ice that flows into the cylinder 360 can be compressed into ice (molded ice) of a predetermined volume by a reciprocating piston 335.

[0253] The cylinder 380 can be extended downward along the tangential direction of the first circumferential surface 242a to form an ice containment space.

[0254] The cylinder 380 may include a portion that extends in a direction corresponding to the discharge direction of the ice separated from the first circumferential surface 242a of the tray 241. For example, the cylinder 380 may include a portion that extends downward so that the ice separated by the first blade 280 falls downward and the falling ice can pass through the cylinder 380.

[0255] The compression part 300 is provided on the inlet side of the cylinder 380 and may include a transfer pipe 370 for transferring ice (powdered ice) discharged from the ice-making part 200 to the cylinder 380. A space for containing the powdered ice is formed inside the transfer pipe 370, and the powdered ice can move into the cylinder 380.

[0256] The compression part 300 may include a discharge pipe 390 provided on the outlet side of the cylinder 380, which provides a predetermined resistance force to compress the ice present in the cylinder 380.

[0257] As an example, in order to provide the resistance, the discharge pipe 390 may be formed such that its cross-sectional area is smaller with respect to the direction in which the ice is moving. In order to provide the resistance, the discharge pipe 390 may be made of an elastically deformable material, such as silicone.

[0258] The outlet of the discharge pipe 390 is open, and the molded ice, which is compressed or recombined as it passes through the discharge pipe 390, can be discharged through the open outlet of the discharge pipe 390.

[0259] The cutter wall 395 is positioned at a set distance from the outlet of the discharge pipe 390 so as to interfere with the molded ice discharged through the discharge pipe 390.

[0260] The cutter wall 395 includes an inclined surface facing the discharge pipe 390, and the molded ice discharged from the discharge pipe 390 is cut while being interfered with by the inclined surface. The cut ice can then fall into the ice bin 500.

[0261] The configuration of the transfer pipe 370 and cylinder 380 will be described in more detail with reference to Figures 11 and 12.

[0262] The transfer pipe 370 may include a transfer body 371 that forms an inlet 370a into which the powdered ice separated from the tray 241 flows. The inlet 370a may be positioned adjacent to the tip portion of the first blade 280 that scrapes the ice from the first circumferential surface 242a.

[0263] The transfer pipe 370 may include a guide surface 373 that contacts the first blade 280. The guide surface 373 is located on one side of the inlet 370a, and the ice separated by the first blade 280 can flow along the guide surface 373 into the interior of the transfer pipe 370 through the inlet 370a. An ice containment space 370b may be formed inside the transfer pipe 370.

[0264] The transfer pipe 370 may include a first fastening portion 372a that is connected to the first bracket 220 of the ice-making part 200. The transfer pipe 370 may also include a second fastening portion 372b that is connected to the cylinder 380.

[0265] The cylinder 380 is fastened to the outlet side of the transfer pipe 370 and extends downward, and may include an internal space that forms an ice containment space. The ice that has accumulated at the bottom of the transfer pipe 340 can be moved into the cylinder 360 by the piston 335.

[0266] The cylinder 380 can also be understood as constituting a part of the transfer pipe in a broad sense in that it guides the transfer of ice. Therefore, the transfer pipe 370 may be referred to as a "first transfer pipe", and the cylinder 380 may be referred to as a "second transfer pipe".

[0267] The cylinder 380 may include a cylinder body 381 that forms an ice accommodation space. The inner wall of the cylinder body 381 may form a cross-sectional area that decreases in the ice discharge direction, so that ice can be easily compressed or recombined inside the cylinder body 381.

[0268] The cylinder 380 may include a cylinder fastening portion 383 that is fastened to the first bracket 220.

[0269] The compression part 300 may include a discharge pipe 390 provided on the outlet side of the cylinder 380 and providing a force for compressing or recombining the ice transferred in the cylinder 380.

[0270] The discharge pipe 390 may include a discharge pipe body 391 coupled to the cylinder 380, and an inclined portion 392 that forms at least a part of the discharge pipe body 391 and has a cross-sectional area that decreases in the direction in which ice is discharged. The discharge pipe 390 may include a discharge hole 393 for discharging the compressed or recombined ice.

[0271] The piston 365 pressurizes one side of the ice present in the cylinder 380, and a resistance force is provided to the other side by the discharge pipe 390, whereby the pulverized ice is compressed or recombined. The compressed pulverized ice is formed into ice having a predetermined shape (ice in the third state, I2, molded ice), and can be discharged through the discharge portion of the discharge pipe 370.

[0272] Figure 16a is a diagram showing the first gear according to the first embodiment of the present invention rotating in a first direction and the gear lever and the interference projection beginning to come into contact; Figure 16b is a diagram showing the first gear according to the first embodiment of the present invention rotating in a first direction and overcoming the gear lever and the interference projection; Figure 16c is a diagram showing the first gear according to the first embodiment of the present invention rotating in a second direction and working in conjunction with the second gear, causing the piston to move toward the cylinder; and Figure 16d is a diagram showing the first gear according to the first embodiment of the present invention rotating in a first direction and working in conjunction with the second gear, causing the piston to move toward the cylinder.

[0273] Figure 17a is a cross-sectional view showing the piston according to the first embodiment of the present invention in the standby position, and Figure 17b is a cross-sectional view showing the piston according to the first embodiment of the present invention in the compression position.

[0274] Figure 18a is a diagram showing the state of the ice maker when ice is released from a tray according to the first embodiment of the present invention, and Figure 18a is a diagram showing the state of the ice maker when ice is compressed by a piston according to the first embodiment of the present invention.

[0275] Refer to Figures 16 to 18 to describe the operation of the tray 241, the gear assembly, and the piston 365.

[0276] Figure 16a shows the arrangement of the gear assembly when the tray 241 is in the ice-making position. In the ice-making position of the tray 241, the first gear portion 333 of the first gear 330 and the second gear 343 of the second gear 340 can be in positions where they are not interlocked with each other.

[0277] At the ice-making position of the tray 241, the second gear 340 is subjected to a force that causes it to rotate clockwise with respect to Figure 16a due to the restoring force of the gear spring 348, and is restricted from rotating counterclockwise unless an external force is present.

[0278] Furthermore, since the stopper 325 of the second gear 340 is interfering with the end of the guide groove 346, it will no longer rotate clockwise. Therefore, the second gear 340 can maintain the state shown in Figure 16a as long as no external force is present.

[0279] When the motor 310 is driven in one direction (forward direction) from the position shown in Figure 16a, the first gear 330 rotates, and the tray 241 can rotate counterclockwise by the first gear 330. When the first gear 330 rotates, the gear lever 350 can also rotate together with it.

[0280] As the tray 241 rotates, ice is removed from the first circumferential surface 242a by the first blade 280. More specifically, the tray 241 rotates counterclockwise from the ice-making position shown in Figure 18a while ice removal is performed.

[0281] When the first gear 330 rotates, the first gear portion 333 of the first gear 330 and the second gear portion 340 of the second gear 340 can be in positions where they do not interlock with each other.

[0282] Figure 16b shows the first gear 330 having rotated approximately one full turn (360 degrees) from the position shown in Figure 16a. At this time, the second part 355 of the gear lever 350 can come into contact with the interference projection 345 of the second gear 340.

[0283] However, the second gear 340 does not rotate clockwise because the stopper 325 is interfering with the end of the guide groove 346, and the second part 355 of the gear lever 350 can overcome the interfering projection 345.

[0284] The resistance encountered when the second part 355 overcomes the interference projection 345 causes the lever spring 337 to be pulled. In other words, the support force of the lever spring 337 allows the second part 355 to overcome the interference projection 345.

[0285] Figure 16a shows the state in which the second part 355 has overcome the interference projection 345.

[0286] Thereafter, in the state shown in Figure 16a, the motor 310 can be driven in the opposite direction (reverse direction). By driving the motor 310, the first gear 330 rotates clockwise, and the second part 355 can also rotate clockwise.

[0287] The second part 355 can pressurize the interference projection 345 during the rotation process. That is, in the configuration shown in Figure 16a, the second part 355 can push up the interference projection 345. At this time, a force greater than the restoring force of the gear spring 348 acts on the second gear 340, allowing the second gear 340 to rotate slightly counterclockwise.

[0288] As the second gear 340 rotates, the second gear portion 343 of the second gear 340 can rotate slightly counterclockwise to a position where it can engage with the first gear portion 333 of the first gear 330. As the second gear portion 343 rotates, it begins to engage with the first gear 330, which rotates clockwise.

[0289] Figure 16c shows the first and second gears 330 and 340 working in conjunction, causing the second gear 340 to rotate counterclockwise. At this time, a rotational force greater than the restoring force of the gear spring 348 is acting on the second gear 340.

[0290] As the second gear 340 rotates, the rack gear 360 moves downward, and the piston 365 moves downward together with the rack gear 360, moving through the internal space of the transfer pipe 370 to the inlet side of the cylinder 380. In this process, the ice powder inside the transfer pipe 370 flows into the internal space of the cylinder 380 and is compressed or recombined (ice compression or recombination process).

[0291] In the process of compressing or recombining the ice, the compression position of the piston 365 is illustrated in Fig. 17b, and the state of the tray 241 is illustrated in Fig. 18b.

[0292] At least a portion of the piston 365 may be drawn into the internal space of the cylinder 380 so that the ice is compressed. However, differently from this, the piston 365 may move to the inlet side of the cylinder 380 and may not be drawn into the interior of the cylinder.

[0293] As shown in Fig. 17b, when the piston 365 reaches the compression position, the stopper 325 is interfered with by the end of the guide groove 346 of the second gear 340, so that additional descending of the piston 365 can be prevented.

[0294] After the piston 365 reaches the compression position, the motor 310 is driven in the forward direction again, and as illustrated in Fig. 16d, the first and second gears 330, 340 are interlocked such that the first gear 330 can rotate in the counterclockwise direction, and the second gear 340 can rotate in the clockwise direction.

[0295] The rack gear 360 and the piston 365 ascend in response to the rotation of the second gear 340, and the piston 365 can return to the standby position as shown in Fig. 17a and Fig. 18a. On the other hand, when the second gear 340 rotates in the clockwise direction, the restoring force of the gear spring 348 can easily act on the second gear 340.

[0296] In this way, the interlocking of the motor 310, the gear assemblies 330, 340, 360 and the piston 365 facilitates the ice making and ice releasing of the tray 241 and the ice compressing action by the piston 365.

[0297] Hereinafter, the second embodiment of the present invention will be described. Since the second embodiment differs from the first embodiment only in part of the configuration, the differences will be mainly described, and for the same parts as those of the first embodiment, the description and drawing reference numerals of the first embodiment are incorporated herein by reference.

[0298] Figure 19 is a front left perspective view showing the configuration of an ice maker according to a second embodiment of the present invention; Figure 20 is a front right perspective view showing the configuration of an ice maker according to a second embodiment of the present invention; Figure 21 is a rear perspective view showing the configuration of an ice maker according to a second embodiment of the present invention; Figure 22 is an exploded view showing the configuration of an ice maker according to a second embodiment of the present invention; and Figure 23 is a front view showing a partial configuration of an ice maker according to a second embodiment of the present invention.

[0299] Referring to Figures 19 to 23, the ice maker 100a according to a second embodiment of the present invention may include a motor 1310 that generates a driving force and a tray assembly 1240 that is movable by the motor 1310.

[0300] The ice maker 100a may include ice-making brackets 1220 and 1280 that form cold air passages. A cold air duct 400a is connected to one side of the ice-making brackets 1220 and 1280, and the cold air supplied through the cold air duct 400a can flow through the cold air passages formed inside the ice-making brackets 1220 and 1280.

[0301] The cold air duct 400a may include a duct body 1410 extending from the side wall 81 toward the ice-making brackets 1220 and 1280, an inlet 1420 formed at one end of the duct body 1410 and connected to the supply section 82 of the side wall 81, and an outlet 1430 formed at the other end of the duct body 410 and connected to the ice-making brackets 1220 and 280 for discharging cold air.

[0302] The ice-making brackets 1220, 1280 may include a first bracket 1220 that supports a gear assembly 1250, and a second bracket 1280 provided on one side of the first bracket 1220 that supports the tray assembly 1240. The tray assembly 240 may be located in the space between the first bracket 1220 and the second bracket 1280.

[0303] The ice maker 100a may include a water storage tank 1210 for storing water. The water storage tank 1210 can supply water to the tray assembly 240.

[0304] The first bracket 220 may include a water supply pipe bracket 1221c that guides a water supply pipe (not shown) for supplying water to the water storage tank 1210. The water supply pipe bracket 1221c may protrude from the first wall 1221 of the first bracket 1220.

[0305] The water supply pipe bracket 1221c includes a water supply pipe connecting portion 1221b into which the water supply pipe is inserted, and at least a portion of the water supply pipe may extend into the ice-making brackets 1220, 1280 via the water supply pipe connecting portion 1221b.

[0306] The tray assembly 1240 may include a tray 241 that receives water and performs ice making. For example, the tray 1241 may be provided in a rotatable manner. The tray 1241 may have a circumferential surface that forms a water storage space.

[0307] The tray 1241 may include circumferential surfaces 1242a and 1242b (also called circumferential walls). For example, the tray 1241 may have the shape of a drum having circumferential surfaces. These circumferential surfaces may form the outer circumferential surface of the drum. That is, the circumferential surfaces 1242a and 1242b can be understood as extending in the circumferential direction to form the outer circumferential surface of the tray 1241.

[0308] The circumferential surfaces 1242a and 1242b may include a first circumferential surface 1242a to which water is supplied. The first circumferential surface 1242a may form at least a portion of the outer circumferential surface of the tray 241. When the first circumferential surface 1242a is positioned facing the water tank 1210, it may include a surface that comes into contact with the water stored in the water tank 1210.

[0309] The first circumferential surface 1242a may be positioned adjacent to the blade 1290 such that the ice generated on the first circumferential surface 1242a comes into contact with the blade 1290.

[0310] The circumferential surfaces 1242a and 1242b may include a second circumferential surface 1242b connected to the first circumferential surface 1242a and not supplied with water. The second circumferential surface 1242b may include a surface that does not come into contact with the water stored in the water storage tank 1210 when it is positioned facing the water storage tank 1210.

[0311] The second circumferential surface 1242a may be positioned relatively far away from the blade 280 so that the ice generated on the second circumferential surface 1242b does not come into contact with the first blade 1290.

[0312] When the first circumferential surface 1242a is in a position where it is in contact with cold air and freezes, the second circumferential surface 1242b is positioned to face the water storage tank 1210. In this case, the second circumferential surface 1242b does not come into contact with the water in the water storage tank 1210, so the water storage tank 1210 is not cooled by the tray 1241 which forms a low temperature. Therefore, it is possible to prevent the water stored in the water storage tank 1210 from freezing.

[0313] The tray 1241 includes side walls provided on both sides of the circumferential surfaces 1242a and 1242b, and the tray assembly 1240 may include a tray cover 1248 that shields the side walls. The tray cover 1248 may be bonded to both sides of the tray 1241. The tray cover 1248 may be made of a material with low thermal conductivity, such as a non-metallic material. The non-metallic material may include a plastic material.

[0314] The tray 1241 may include an inner circumferential wall 1244a connected to the side wall and forming the inner circumferential surface of the tray 1241. The inner circumferential wall 1244a may form the opposite side of the circumferential surfaces 1242a and 1242b.

[0315] The tray 1241 may include a central bracket 1243 that forms the center (or central axis) of the tray 1241. The central bracket 1243 may protrude from both sides of the tray 241 in the axial direction.

[0316] The center bracket 1243 may be coupled to the drive gear 1251. For example, the center bracket 1243 may include an insertion hole 1243a into which the gear shaft 1270 of the drive gear 1251 is inserted.

[0317] The tray 1241 may include extension walls 1244b extending from the central bracket 1243 toward the inner circumferential wall 1244a. The extension walls 1244b may, for example, extend radially from the central bracket 1243. A plurality of extension walls 1244b may be provided, and the plurality of extension walls 1244b may be spaced apart from each other and arranged circumferentially.

[0318] The tray 1241 can form tray holes 1245. The tray holes 1245 can be understood as holes that penetrate the tray 1241 in the axial direction. Cold air can flow through the tray holes 1245, increasing the cooling area of ​​the tray 1241.

[0319] The tray hole 1245 can be understood as a space defined by the central bracket 1243 and a number of extension walls 1244b and inner circumferential walls 1244a. A number of tray holes 1245 may be formed, and the number of tray holes 1245 may be arranged in the circumferential direction of the tray 1241.

[0320] The first bracket 1220 may include a first wall 1221 through which the motor 1310 is supported. The first wall 1221 may include an insertion hole through which the motor shaft 1312 of the motor 1310 passes, and the motor shaft 1312 may pass through the first wall 1221 and be coupled to the center of the drive gear 1251.

[0321] Driven gears 1260 and 1265 may be rotatably supported in the first wall 1221. For example, the center (or central axis) of the driven gears 1260 and 1265 may be inserted into a support hole in the first wall 1221.

[0322] The ice maker 100a may include a second wall 1222 and a third wall 1223 connected to both ends of the first wall 1221. The second wall 1222 and the third wall 1223 can provide a support structure for some of the components constituting the ice maker 100a.

[0323] The second wall 1222 can form at least a portion of the water supply bracket 1221c. The second wall 1222 may be provided so as to be inclined inward of the water supply bracket 1221c and may include a guide surface 1226 that guides the water discharged from the water supply pipe to the water storage tank 1210. The discharge end of the guide surface 126 may be positioned adjacent to the water storage tank 1210.

[0324] The water storage tank 1210 may be located below the tray assembly 1240. The water storage tank 1210 includes a case having a predetermined capacity, and water discharged from the water supply pipe can flow along the guide surface 1226 and into the water storage tank 1210.

[0325] The water tank 1210 may include a first support step 1211 that forms a water storage space 1210a and supports the cylinder 1360. The first support step 1211 may be positioned on both sides of the front end of the water tank 1210 to support both ends of the cylinder bracket 1365.

[0326] The water tank 1210 may include a second support step 1212 that supports the support wall 1366 of the cylinder 1360. The second support step 1212 may be positioned between two first support steps 1211 and may be formed by a recess in a portion of the tip of the water tank 1210.

[0327] The support wall 1366 of the cylinder 1360 can be understood as a component that extends from the cylinder bracket 1365 toward the front end of the water tank 1210 to guide some of the ice separated from the tray 1241 into the cylinder 1360 if some of the ice cannot flow into the water tank 1210.

[0328] The water storage tank 1210 may include a support bracket 1218 supported by the second bracket 1280. The support bracket 1218 may be positioned adjacent to the rear end of the water storage tank 1210.

[0329] The second bracket 1280 may include a support groove 1288 formed in the cover wall 1281 to support the water tank 1210. The support bracket 1218 of the water tank 1210 may be inserted into and supported by the support groove 1288.

[0330] A first temperature sensor 1390 may be installed in the cylinder 1360. The first temperature sensor 1390 is supported by the cylinder bracket 1365 and, for example, can sense the temperature of the cylinder 1360 by contacting its surface.

[0331] A second temperature sensor 1395 may be installed in the water storage tank 1210. The second temperature sensor 1395 is installed on the wall of the water storage tank that defines the water storage space 1210a and can sense the temperature of the water storage tank or the temperature of the water stored in the water storage tank.

[0332] The ice maker 100a may include a blade 1290 that contacts the ice produced in the tray 1241 to separate the ice produced in the tray 1241. The blade 1290 may be positioned adjacent to the rotation path of the tray 1241. In particular, the blade 1290 may be positioned adjacent to the first circumferential surface 1242a as the tray 1241 rotates.

[0333] The ice maker 100a may include a transfer pipe coupling portion 1295 that connects the blade 1290 to the transfer pipe 1340. The transfer pipe coupling portion 1295 may extend in both directions from the blade 1290 and be coupled to one surface of the transfer pipe 1340. The transfer pipe coupling portion 1295 may be formed integrally with the blade 1290.

[0334] The second bracket 1280 may include a cover wall 1281 that shields one side of the tray assembly 1240. The cover wall 1281 can form at least one side of the cold air passage formed inside the ice-making brackets 1220 and 1280.

[0335] The cover wall 1281 may include a through-hole 1283 that supports the central bracket 1243 of the tray assembly 1240. The tray assembly 1240 can rotate with respect to the central bracket 1243.

[0336] The tray assembly 1240 and the water tank 1210 may be placed in the space between the second bracket 1280 and the gear cover 1230.

[0337] The gear cover 1230 may be positioned to cover one side of the gear assembly 1250. The gear assembly 1250 may be positioned in the space between the first bracket 1220 and the gear cover 1230.

[0338] The gear cover 1230 may include a hole through which the gear shaft 1270 passes, and the gear shaft 1270 may be coupled to the gear assembly 1240 through the hole in the gear cover 1230.

[0339] The transfer pipe 1340 may be positioned in the space between the second bracket 1280 and the gear cover 1230. The transfer pipe 1340 may be integral to the gear cover 1230 or bonded to one side of the gear cover 1230. The second bracket 1280 may be bonded to the transfer pipe 1340 by a predetermined fastening member.

[0340] The transfer pipe 1340 includes one surface to which the blade 1290 is joined, and this surface can be understood as the surface facing the circumferential surfaces 1242a and 1242b. The end of the transfer pipe 1340, for example the upper end, may include an inlet 1345 (see Figure 27a) into which ice flows.

[0341] The cylinder 1360 may be positioned in the space between the second bracket 1280 and the gear cover 1230. The cylinder 1360 may be coupled to the end of the transfer pipe 1340 and may include an inlet 1362 into which ice transferred through the transfer pipe 1340 flows. The cylinder 1360 may include a cylinder bracket 1365 coupled to the transfer pipe 1340.

[0342] The ice maker 100a may include a piston 1350 that is movable to compress or recombine the ice separated in the tray assembly 240. The piston 1350 can be moved by the drive of the motor 1310.

[0343] The piston 1350 may be located outside the transfer pipe 1340 and provided inside the transfer pipe 1340 so as to be able to move linearly downward, for example, with reference to Figure 22.

[0344] The ice maker 100a may include a power transmission device for transmitting the driving force of the motor 1310 to the piston 1350. The power transmission device may include a gear assembly 1250.

[0345] The gear assembly 1250 may include a drive gear 1251 that rotates coupled to the motor shaft 1312. The gear assembly 1250 may also include a gear shaft 1270 that is coupled to the drive gear 1251 and extends to the tray assembly 1240.

[0346] The gear shaft 1270 may be coupled to the central bracket 1243 of the tray 1241. When the motor 310 is driven, the driving force of the motor 310 is transmitted to the tray assembly 1240 via the drive gear 1251, allowing the tray 1241 to rotate.

[0347] The gear assembly 1250 may include driven gears 1260 and 1265 that are interlocked with the drive gear 1251. The driven gears 1260 and 1265 may include a first driven gear 1260 and a second driven gear 1265 that are interlocked with each other.

[0348] For the sake of explanation, the drive gear 1251 may be referred to as the "first gear," the first driven gear 1260 as the "second gear," and the second driven gear 1265 as the "third gear."

[0349] The gear assembly 1250 may include a rack gear 1330 that interlocks with the second driven gear 1265. The rack gear 1330 may include a rack body 1331 that extends vertically in accordance with the direction of movement of the piston 1350, and a number of gear teeth 1332 formed on the rack body 1331 that interlock with the second driven gear 1265 (see Figure 26a).

[0350] The ice maker 100a may include a piston bracket 1355 connecting the rack gear 1330 and the piston 1350. The piston bracket 1355 may be provided at the upper end of the rack gear 1330, and the piston 1350 may be positioned to extend downward, connected to the piston bracket 1355. The piston 1350 and the rack gear 1330 can move together by the piston bracket 1355.

[0351] The first bracket 1220 may include a first rail groove 1227 that guides the linear movement of the rack gear 1330. The first rail groove 1227 may be located on one side of the rack gear 1330 and may be elongated in the vertical direction of the first bracket 1220.

[0352] The gear cover 1230 may include a second rail groove 1236 that guides the linear movement of the rack gear 1330. The rail groove 1236 may be located on the other side of the rack gear 1330 and may be elongated in the vertical direction of the gear cover 1230.

[0353] The rack gear 1330 may include rails 1335 that are inserted into and move in the first and second rail grooves 1227 and 1236. For example, the rails 1335 may be located at both ends of the rack gear 1330.

[0354] The ice that flows into the transfer pipe 1340 can be compressed into ice of a predetermined volume (molded ice) by a reciprocating piston 1350. The cylinder 1360 can be extended downward along the tangential direction of the first circumferential surface 242a to form an ice containment space.

[0355] The cylinder 1360 may include a portion that extends in a direction corresponding to the direction in which ice is discharged, separated from the first circumferential surface 242a of the tray 241.

[0356] The ice maker 100a may include a discharge pipe 1370 provided on the outlet side of the cylinder 1360, which provides a predetermined resistance force to compress the ice present in the cylinder 1360. The description of the discharge pipe 1370 is based on the description of the discharge pipe of the first embodiment.

[0357] The ice maker 100a may include a cutter wall 1380 supported by the gear cover 1230. The cutter wall 1380 is positioned at a set distance from the outlet of the discharge pipe 1370 so as to interfere with the molded ice discharged through the discharge pipe 1370. The cutter wall 1380 may include an inclined surface facing the discharge pipe 1370.

[0358] Figure 24 is a drawing showing the configuration of a gear assembly and piston according to a second embodiment of the present invention, and Figure 25 is a front view showing the configuration of a gear assembly according to a second embodiment of the present invention.

[0359] Referring to Figures 24 and 25, the gear assembly 1250 according to a second embodiment of the present invention may include a drive gear 1251 connected to the motor 1310, and a first driven gear 1260 and a second driven gear 1265 that are interlocked with the drive gear 1251.

[0360] The drive gear 1251 can be understood as a unidirectional rotating gear that rotates in one direction (for example, counterclockwise in the direction shown in Figure 25).

[0361] The drive gear 1251 may include a compression gear 1252 and a return gear 1255. The gear shaft 1270 of the drive gear 1251 is coupled to the compression gear portion 1252 and the return gear portion 1255 so that when the drive gear 1251 rotates, the compression gear portion 1252 and the return gear portion 1255 can rotate together. The gear shaft 1270 may be referred to as the "central shaft".

[0362] As an example, the compression gear section 1252 may be positioned between the return gear section 1255 and the motor 1310. The compression gear section 1252 and the return gear section 1255 may be positioned axially separated.

[0363] The compression gear portion 1252 may include an outer circumferential surface on which multiple gear teeth 1253a, 1253b, 1253c, and 1253d are formed. The multiple gear teeth may be provided only on a portion of the outer circumferential surface of the compression gear portion 1252, rather than on the entire outer circumferential surface. In other words, the compression gear portion 1252 can form an incomplete gear portion. For example, the compression gear portion 1252 may be provided only in a region that forms a central angle of approximately 60 degrees with respect to the center of the compression gear portion 1252.

[0364] The return gear portion 1255 may include an outer circumferential surface on which multiple gear teeth 1256a, 1256b, 1256c, and 1256d are formed. The multiple gear teeth may be provided only on a portion of the outer circumferential surface of the return gear portion 1255, rather than on the entire outer circumferential surface. In other words, the return gear portion 1255 can form an incomplete gear portion. For example, the return gear portion 1255 may be provided only in a region that forms a central angle of approximately 60 degrees with respect to the center of the return gear portion 1255.

[0365] With respect to the central axis 1270 of the drive gear 1251, the teeth 1253a, 1253b, 1253c, and 1253d of the numerous gears in the compression gear section 1252 and the teeth 1256a, 1256b, 1256c, and 1256d of the numerous gears in the return gear section 1255 may be formed to have a phase difference in the circumferential direction.

[0366] As an example, when the drive gear 1251 rotates in one direction (counterclockwise, as shown in Figure 25), the teeth 1253a, 1253b, 1253c, and 1253d of the numerous gears in the compression gear section 1252 may be formed to have a phase difference in the circumferential direction such that the teeth 1256a, 1256b, 1256c, and 1256d of the numerous gears in the return gear section 1255 are first linked to the first driven gear 1260, and then the teeth 1256a, 1256b, 1256c, and 1256d of the numerous gears in the return gear section 1255 are linked to the second driven gear 1265.

[0367] For details, please refer to Figure 25. The tooth 1253a of the first gear located at one end of the numerous gears in the compression gear section 1252 and the tooth 1256a of the first gear located at one end of the numerous gears in the return gear section 1255 can have a phase difference with respect to the center C of the drive gear 1251.

[0368] A first extension line connects the center C of the drive gear 1251 to the teeth 1253a of the first gear of the compression gear section 1252. JPEG2026169214000002.jpg8169 and a second extension line connecting the center C of the drive gear 1251 and the teeth 1256a of the first gear of the return gear section 1255. JPEG2026169214000003.jpg8169 can form a set angle θ1. For example, the set angle can form approximately 30 degrees.

[0369] The first driven gear 1260 may be arranged to interlock with the compression gear section 1252. Conversely, the first driven gear 1260 may be arranged not to interlock with the return gear section 1255.

[0370] The first driven gear 1260 may include a center bracket 1262 that forms a center. The center bracket 1262 may protrude from the first driven gear 1260 and be supported by the first bracket 1220. The first driven gear 1260 may include an outer surface that forms the teeth 1263 of a plurality of gears. The teeth 1263 of the plurality of gears may be formed on the entire outer surface of the first driven gear 1260.

[0371] The second driven gear 1265 may be arranged to interlock with the return gear section 1255. Conversely, the second driven gear 1265 may be arranged not to interlock with the compression gear section 1252.

[0372] The first driven gear 1260 and the second driven gear 1265 may be arranged to interlock with each other.

[0373] The numerous gear teeth formed on the first driven gear 1260 may have an axial width that allows them to interlock with the gear teeth of the compression gear section 1252 and the gear teeth of the second driven gear 1265. That is, the axial width W1 of the gear teeth of the first driven gear 1260 may be larger than the axial width W2 of the gear teeth of the compression gear section 1252.

[0374] That is, the numerous gear teeth formed on the first driven gear 1260 may include a first portion that interlocks with the gear of the compression gear portion 1252 and a second portion that interlocks with the gear of the second driven gear 1265. The first portion and the second portion may be arranged in the axial direction.

[0375] The numerous gear teeth formed on the second driven gear 1265 may have an axial width that allows them to interlock with the gear teeth of the first driven gear 1260 and the gear of the return gear section 1255. That is, the axial width W3 of the gear teeth of the second driven gear 1265 may be larger than the axial width W4 of the gear teeth of the return gear section 1255.

[0376] That is, the numerous gear teeth formed on the second driven gear 1265 may include a first portion that interlocks with the gear of the first driven gear 1260 and a second portion that interlocks with the gear of the return gear portion 1255. The first portion and the second portion may be arranged in the axial direction.

[0377] Figures 26a to 26d are diagrams showing the operation of a gear assembly according to a second embodiment of the present invention, Figure 27a is a diagram showing the state of ice removal in a tray according to a second embodiment of the present invention, and Figure 27b is a diagram showing the compression action of a piston according to a second embodiment of the present invention.

[0378] Referring together with Figure 25 to Figures 26a to 27b, when the drive gear 1251 rotates counterclockwise with respect to Figure 25, the drive gear 1251 can rotate independently without being linked to the first driven gear 1260 and the second driven gear 1265.

[0379] The behavior of the drive gear 1251 when it rotates independently is shown in Figure 26a, and in this case, the tray assembly 1240 can be rotated counterclockwise by the drive gear 1251 as shown in Figure 27a.

[0380] In the state shown in Figure 27a, the tray assembly 1240 rotates, and de-icing occurs on the first circumferential surface 1242a of the tray 1241 (de-icing operation). That is, the first circumferential surface 1242a rotates while positioned adjacent to the blade 1290, and the blade 1290 can come into contact with the ice on the first circumferential surface 1242a and separate the ice.

[0381] The de-icing operation may be performed during the section in which the first circumferential surface 1242a passes over the blade 1290. The first circumferential surface 1242a may be formed only on a portion of the outer circumferential surface (center angle 360 ​​degrees) of the entire outer circumferential surface (center angle θ11). For example, as shown in Figure 27b, the first center angle θ11 may be formed at a value of approximately 220 to 240 degrees.

[0382] The second circumferential surface 1242b may be formed only in the region corresponding to the remaining circumferential surface, for example, the region corresponding to the second central angle θ12. For example, the second central angle θ12 may be formed with a value of approximately 120 to 140 degrees.

[0383] During the de-icing process, the tray 1241 rotates, while the first driven gear 1260 and the second driven gear 1265 do not rotate. Therefore, the rack gear 1330 and the piston 1350 can remain stationary and motionless.

[0384] On the other hand, the first circumferential surface 1242a of the tray 1241 from which ice has been removed can be immediately in contact with the water in the water tank 1210 and receive a water supply (water supply process). In other words, the water supply process to the tray 1241 may be carried out continuously after the ice removal process.

[0385] After the tray 241 has rotated to allow this de-icing process to take place, the drive gear 1251 continues to rotate, and the compression gear section 1252 can begin to work in conjunction with the first driven gear 1260. This is illustrated in Figure 26b.

[0386] The first driven gear 1260 rotates clockwise in conjunction with the compression gear portion 1252 of the drive gear 1251, and the second driven gear 1265 can rotate clockwise in conjunction with the first driven gear 1260.

[0387] The rack gear 1330 moves downward in conjunction with the second driven gear 1265, and the piston 1350 can move in a direction toward the cylinder 1360, for example, downward. As the piston 1350 moves through the internal space of the transfer pipe 1340, it can push the ice inside the transfer pipe 1340 into the cylinder 1360 (compression process).

[0388] Such a compression process may be performed during the section in which the first driven gear 1260 is in conjunction with the compression gear section 1252. At this time, the state of the tray 1241 is illustrated in Figure 27b. Figure 27b shows the state in which the piston 1350 has moved to the maximum compression position. The compression process may be performed during the section in which the "A" region of the second circumferential surface 1242a passes to the side of the blade 1290, for example, during the section in which the tray 1241 rotates approximately 60 degrees.

[0389] Once the compression process is complete, as shown in Figure 26c, the linkage between the compression gear section 1252 and the first driven gear 1260 is released, and the return gear section 1255 and the second driven gear 1265 begin to link.

[0390] The second driven gear 1265 can rotate clockwise in conjunction with the return gear portion 1255, and the first driven gear 1260 can rotate counterclockwise in conjunction with the second driven gear 1265.

[0391] As the second driven gear 1265 rotates counterclockwise, the rack gear 1330 moves upward, and the piston 1350 can move upward, for example, away from the cylinder 1360. Therefore, the piston 1350 can return to its return position (return process). The state in which the piston 1350 has returned to its return position is illustrated in Figure 26d.

[0392] When the piston 1350 returns to its original position, the B region of the second circumferential surface 1242b shown in Figure 27b passes to the side of the blade 1290.

[0393] If the drive gear 1251 rotates further after the return process is completed, the interlocking between the drive gear 1251 and the first and second driven gears 1260 and 1265 may be stopped. As can be seen from Figure 26d, if the drive gear 1251 rotates a little more, the interlocking between the drive gear 1251 and the first and second driven gears 1260 and 1265 may be stopped.

[0394] After the piston 1350 has returned to its original position, an ice-making process may be carried out in which the water supplied to the first circumferential surface 1242a of the tray 1241 freezes. When the ice-making process is carried out, the motor 1310 stops, and the rotation of the drive gear 1251 and the first and second driven gears 1260 and 1265 stops, allowing the unit to be in a standby state. At this time, the tray assembly 1240 is shown in Figure 27a.

[0395] When the ice-making process is performed for a set time (for example, a time value between 30 seconds and 1 minute), the system recognizes that ice-making is complete and the motor 1310 can start driving.

[0396] The motor 1310 drives the gear assembly shown in Figure 26a and the tray 1241 shown in Figure 27a, initiating the de-ice process of the tray 1241 once again. This de-ice process, compression process, recovery process, and ice-making process may be repeated.

[0397] In this way, the drive gear 1251 rotates in one direction when driven by the motor 1310, causing the tray 1241 to rotate, and the compression gear section 1252 and return gear section 1255 of the drive gear 1251 and the first and second driven gears 1260 and 1265 work together to easily perform the ice removal process, compression process, return process, and ice making process of the tray 1241.

Claims

1. Cabinets forming a storage room, A door for opening and closing the aforementioned cabinet, A tray is rotatably mounted on the door and has a circumferential surface that receives water to generate ice, A cylinder that forms a space for containing ice separated from the circumferential surface, A motor that provides driving force to the tray, A gear assembly that transmits the driving force of the motor to the tray, A refrigerator, comprising: a piston that moves linearly in conjunction with the gear assembly to guide ice separated from the circumferential surface into the cylinder.

2. The refrigerator according to claim 1, comprising a water tank provided on one side of the tray for storing water supplied to the circumferential surface of the tray.

3. The refrigerator according to claim 1, comprising a blade positioned on one side of the cylinder so as to face the circumferential surface and in contact with the ice formed on the circumferential surface.

4. The circumferential surface of the tray includes a first circumferential surface that is positioned such that it has a first central distance from the center of the tray to receive a water supply, A refrigerator according to claim 1, comprising: a second circumferential surface arranged to have a second central distance smaller than the first central distance so as not to receive a water supply.

5. The refrigerator according to claim 1, wherein the gear assembly includes a first gear connected to the motor and the tray.

6. The refrigerator according to claim 5, wherein the gear assembly includes a second gear that interlocks with the first gear, and the first gear and the second gear are configured as incomplete gears that form gear teeth only on a portion of their outer surfaces.

7. The refrigerator according to claim 6, wherein the motor is a motor that drives in both directions so that the first gear can rotate in a first direction and in a second direction.

8. A gear lever is provided that is rotatably supported on the first gear and capable of contacting an interference projection on the second gear, The refrigerator according to claim 6, comprising a lever spring having a first end connected to the gear lever and a second end supported by the first gear.

9. Includes a bracket that supports the gear assembly, The refrigerator according to claim 6, wherein the bracket includes a housing bracket that supports the center of the second gear and a stopper that is inserted into a guide groove of the second gear.

10. The refrigerator according to claim 9, comprising the second gear and a torsion spring having both ends supported by the bracket.

11. The refrigerator according to claim 6, wherein the gear assembly includes a rack gear that is interlocked with the second gear and connected to the piston.

12. The refrigerator according to claim 5, wherein the first gear includes a compression gear portion and a return gear portion arranged in the axial direction, and the compression gear portion and the return gear portion are connected to a central axis and rotate together.

13. The refrigerator according to claim 12, wherein the compression gear section and the return gear section are configured as incomplete gears with gear teeth formed only on a portion of their outer surfaces.

14. The refrigerator according to claim 12, wherein the motor is a motor that drives in one direction such that the first gear can only rotate in the first direction.

15. The refrigerator according to claim 12, wherein the gear assembly includes a second gear that is interlocked with the compression gear section but is not interlocked with the return gear section and has an axial width greater than the axial width of the compression gear section, and a third gear that is interlocked with the second gear.

16. The refrigerator according to claim 15, wherein the third gear has an axial width greater than the axial width of the return gear, such that it is interlocked with the return gear and not interlocked with the compression gear.

17. The refrigerator according to claim 15, further comprising a rack gear which is linked to the third gear and connected to the piston.

18. Cabinets forming a storage room, A door for opening and closing the aforementioned cabinet, A tray rotatably mounted on the cabinet or door, A blade is positioned adjacent to the tray to separate the ice formed on the tray, A cylinder extending tangentially from the outer circumferential surface of the tray and containing the ice separated by the blade, A piston that moves on one side of the cylinder in a direction approaching the cylinder or in a direction away from the cylinder, A motor that generates a driving force for the rotation of the tray, A refrigerator, comprising a gear assembly that transmits the driving force of the motor to the piston.

19. The gear assembly is A first gear connected to the tray and supporting the lever gear, The refrigerator according to claim 18, further comprising: a second gear which is interlocked with the first gear and has a projection that contacts the lever gear.

20. The gear assembly is A first gear, connected to the tray, includes a compression gear section and a return gear section, A second gear that is linked to the compression gear portion of the first gear, The refrigerator according to claim 18, further comprising a third gear that is interlocked with the return gear portion of the first gear.

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