CN111197893A

CN111197893A - Ice maker and refrigerator

Info

Publication number: CN111197893A
Application number: CN201911127174.3A
Authority: CN
Inventors: 金容贤; 洪镇驲
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2018-11-16
Filing date: 2019-11-18
Publication date: 2020-05-26
Also published as: EP3653974A1

Abstract

The ice maker of the present invention comprises: an upper tray assembly including an upper mold portion having at least one upper cavity; a lower tray assembly including a lower support and a lower mold section having at least one lower cavity and having flexibility, the lower mold section being detachably supported by the lower support; and a lower ejector movable relative to the upper tray assembly between an open position in which the upper and lower cavities form at least one ice cavity for making ice and a closed position in which the lower ejector penetrates a lower opening of the lower support such that the lower mold portion is partially separated from the lower support to de-ice from the lower cavity.

Description

Ice maker and refrigerator

Technical Field

The present specification relates to an ice maker and a refrigerator.

Background

In general, a refrigerator is a home appliance for enabling food to be stored in a storage space of an interior shielded by a door at a low temperature.

The refrigerator cools the inside of the storage space using cold air so that stored foods can be stored in a refrigerated or frozen state.

In general, an ice maker for making ice is provided inside a refrigerator.

The ice maker is configured to make ice by receiving water supplied from a water supply source or a water tank into a tray.

And, the ice maker is configured to move the made ice from the ice tray by a heating manner or a twisting manner.

The ice maker, which automatically supplies and removes water and ice in the above-described manner, is formed to be opened upward to take out the formed ice.

The ice produced by the ice maker having the above-described structure has at least one surface having a flat surface, such as a crescent shape or a diamond shape.

In addition, the ice can be more conveniently used in the case where the shape of the ice is formed in a spherical shape, and different use feelings can be provided to the user. Also, when storing the produced ice, it is possible to minimize ice condensation by minimizing the area of contact between the ice.

An ice maker is provided in korean registered patent publication No. 10-1850918, which is prior art document 1.

The ice maker of prior document 1 includes: an upper tray in which a plurality of upper housings having a hemispherical shape are arranged, the upper tray including a pair of link guide portions extending upward from both side ends; a lower tray to which a plurality of lower housings having a hemispherical shape are arranged and which is rotatably connected to the upper tray; a rotating shaft connected to rear ends of the lower tray and the upper tray to rotate the lower tray with respect to the upper tray; a pair of connecting rods, one end of which is connected with the lower tray and the other end of which is connected with the connecting rod guide part; and an upper push-out pin assembly having both ends connected to the pair of links in a state of being inserted into the link guide portions, respectively, and ascending and descending together with the links.

The lower tray includes: a tray main body formed with a lower case; a lower frame formed with a tray main body installation part for installing the tray main body; and an upper frame fixed to the bottom surfaces of the tray main body and the lower frame.

In the case of prior document 1, the tray main body is formed of a flexible plastic material that is deformable in outer shape.

Also, the ice maker of prior art document 1 includes a lower push-out pin assembly for pressing the lower tray when the lower tray is rotated.

When the lower tray is pressed by the lower push-out pin assembly, the ice of the lower tray is separated from the lower tray.

However, in the case of the conventional document 1, since a part of the lower tray is pressed by the lower push-out pin, there is a disadvantage that ice cannot be separated from the lower tray even if the ice is pressed by the lower push-out pin.

At this time, as the load applied to the lower ejector pin assembly increases, the lower ejector pin assembly may be deformed.

Further, the lower tray may not reach the maximum ice moving position due to the tolerance of the motor gear, and thus all of the ice may not be separated from the lower tray.

Also, at the same time, as most of the ice is removed, there is a problem in that a load applied to a motor rotating the lower tray increases.

Japanese registered patent publication No. 4657626, which is prior art document 2, discloses an automatic ice making device.

The automatic ice making device includes: an ice-making tray provided with a hole at a lower portion thereof; a film of rubber material configured to plug the hole in the ice making tray; and an ice pushing device for pushing the film through the holes to separate the ice from the ice making tray.

However, the ice pushing device of the prior art document is configured as a part of the pressing film, and thus, even if the pressing film is pressed by the ice pushing device, there is a disadvantage that ice cannot be separated from the film.

Disclosure of Invention

The present embodiment provides an ice maker in which a pressing force of a lower ejector is effectively transmitted to a lower tray during ice moving, thereby enabling ice to be smoothly separated from the lower tray.

The present embodiment provides an ice maker in which a pressing force of a lower ejector pressing a lower tray acts on a central portion of the lower tray, thereby improving ice transfer performance.

The present embodiment provides an ice maker that prevents ice from being broken or damaged during the process in which a lower ejector presses a lower tray.

The present embodiment provides an ice maker that prevents a lower ejector from interfering with a lower supporter supporting a lower tray during the lower ejector presses the lower tray.

The present embodiment provides an ice maker capable of reducing a load instantaneously applied to a motor included in a driving unit providing a rotational power to a lower assembly by distributing a load applied to the motor by a time difference.

The present embodiment provides a refrigerator including the above-described ice maker.

An ice maker according to an aspect includes: an upper tray assembly including an upper mold portion having at least one upper cavity; a lower push tray assembly comprising a lower support and a lower mold portion having at least one lower cavity and being flexible, detachably supported by the lower support; and a lower ejector.

The lower tray assembly is movable between an open position and a closed position relative to the upper tray assembly.

In the closed position, the upper and lower chambers may form at least one ice chamber for making ice.

In the open position, the lower ejector may pass through a lower opening of the lower support such that the lower mold section is partially separated from the lower support to de-ice from the lower cavity.

The lower opening may be formed at a position corresponding to the center of the outer surface of the lower chamber.

The contact point in the lower mold portion with the lower ejector may correspond to a centerline of the lower mold portion or to a symmetric centerline of the lower cavity.

The lower tray assembly is rotatable with respect to the upper tray assembly about a rotation axis.

The lower ejector may be formed in an arc shape of a circle having a center corresponding to the rotation axis.

The end surface of the lower ejector may be parallel to a tangent (tangent line) or a perpendicular line of the outer circumferential surface of the lower mold portion at a point where the lower ejector initially contacts the lower mold portion.

The lower mold portion may be formed of a flexible material or a silicon material.

The lower support may cover 1/2 or more of an outer circumferential surface of the lower mold part.

A part of the lower mold part is fixed to the lower support, and another part may be detachably supported by the lower support.

Further comprising a lower heater received in a heater receiving groove formed in the lower support adjacent the lower opening, the lower heater being contactable with the lower mold section at least in a closed position.

An upper ejector for separating ice from the upper chamber may be further included. The upper mold part may include an upper opening for passing the upper ejector therethrough.

The upper chamber and the lower chamber may be formed in a hemispherical shape to form a spherical ice chamber.

An ice maker according to another aspect may include: an upper tray and a lower tray forming an ice chamber; a lower support member supporting the lower tray; and pressing a lower ejector of the lower tray to separate ice from the lower tray.

The lower tray is rotatable relative to the upper tray. The lower ejector may include a lower ejector pin.

The lower ejector pin may penetrate the lower supporter to press the lower tray during rotation of the lower tray.

At least a portion of the lower push-out pin may be formed in a curved shape in a length direction to smoothly separate ice from the lower tray.

The length of the lower ejector pin may be formed to be greater than the radius of the ice chamber.

The lower ejector pin may include a pressing portion for pressing the lower tray.

The pressing part includes a pressing inclined part to increase a contact area of the pressing part with the lower tray during ice transfer, and an upper end part of the pressing inclined part contacts the lower tray before the lower end part during ice transfer.

When the rotation angle of the lower tray is increased, the lower end of the pressing inclined portion also comes into contact with the lower tray.

The pressing slope part is in surface contact with a central part of the lower tray in a state where the lower tray is rotated to the ice transfer position.

In the ice making position of the lower assembly, the first contact surface of the upper tray is in contact with the second contact surface of the lower tray. When a line passing through the first contact surface is referred to as a first imaginary line and a line passing through the second contact surface is referred to as a second imaginary line, an angle formed by the first imaginary line and the second imaginary line may be 100 degrees or more in a state where the lower assembly is rotated to the ice moving position.

The lower ejector may further include an ejector main body having an inclined surface inclined with respect to a vertical line. The lower ejector pin may protrude from the inclined surface.

In a state where the lower assembly is rotated to the ice moving position, a distance between an end of the lower ejector pin and the ejector body may be equal to or greater than a distance between the second imaginary line and the ejector body.

And, in a state where the lower assembly is rotated to the ice moving position, a distance between a portion of the lower tray contacting an end of the lower push-out pin and the ejector main body may be greater than a distance between the second imaginary line and the ejector main body.

Separate ice chambers may be defined by the upper tray and the lower tray.

A plurality of lower ejector pins may protrude from the ejector body.

One portion of the plurality of lower ejector pins may be formed in a longer length than another portion.

The ice maker may further include a driving unit for rotating the lower assembly.

A length of a lower ejector pin of the plurality of lower ejector pins located closest to the driving unit may be formed to be longer than a length of at least one of the remaining lower ejector pins.

A refrigerator according to another aspect may include: an upper assembly including an upper tray defining an upper chamber that is part of the ice chamber; a lower assembly including a lower tray defining a lower chamber as another part of the ice chamber and a lower support supporting the lower tray and having a lower opening, the lower assembly being rotatable with respect to the upper assembly; and a lower ejector provided with a lower ejector pin penetrating the lower opening to press the lower tray when the lower assembly is rotated to perform an ice moving process.

At least a portion of the lower ejector pin is formed in a curved shape in a length direction, and the length of the lower ejector pin may be formed to be greater than a radius of the ice chamber.

A refrigerator according to another aspect may include: a box body provided with a freezing chamber; and an ice maker making ice using cold air for cooling the freezing chamber.

The ice maker may include: an upper tray defining an upper chamber; a lower tray defining a lower chamber forming an ice chamber together with the upper chamber; a lower support supporting the lower tray and having a lower opening; and a lower ejector provided with a lower ejector pin penetrating the lower opening to press the lower tray when the lower tray is rotated in a forward direction in the ice moving process.

The lower tray may be movable from an ice making position to an ice moving position, and at least a part of a portion of the lower tray that contacts the lower push-out pin may be located on an opposite side of the lower opening with respect to an imaginary line passing through a surface of the lower tray that contacts the upper tray in a state where the lower tray is rotated to the ice moving position.

Alternatively, the lower tray may include a contact surface contacting the upper tray at the ice making position, and a portion of the lower push-out pin may intersect an imaginary line passing through the contact surface of the lower tray in a state where the lower tray is rotated to the ice transfer position.

An ice maker according to still another aspect may include: an upper assembly including an upper tray defining an upper chamber that is part of the ice chamber; a lower assembly including a lower tray defining a lower chamber as another part of the ice chamber and a lower support supporting the lower tray and having a lower opening and being rotatable with respect to the upper assembly; a lower ejector penetrating the lower opening to press the lower tray when the lower assembly is rotated in a forward direction during ice moving.

The lower ejector pin may include a pressing portion for pressing the lower tray. The pressing portion includes a pressing inclined portion including: an upper end portion located at a position close to the upper tray; and a lower end portion located at a position lower than the position of the upper end portion.

The upper end portion may contact the lower tray before the lower end portion during ice moving.

When the lower tray is additionally rotated in a state where the upper end portion is in contact with the lower tray, the upper end portion and the lower end portion are in contact with the lower tray together, and the pressing inclined portion may be in surface contact with the lower tray.

The lower ejector pin may be introduced into the interior of the lower support through the lower opening.

A length of a portion of the lower ejector pin introduced into the inside of the lower supporter may be equal to or greater than a radius of the ice chamber.

The lower unit may be rotated from an ice making position where the first contact surface of the upper tray is in contact with the second contact surface of the lower tray to an ice moving position, and a line passing through the first contact surface may be referred to as a first imaginary line and a line passing through the second contact surface may be referred to as a second imaginary line.

An angle formed by the first imaginary line and the second imaginary line may be 100 degrees or more in a state where the lower assembly is rotated to the ice moving position.

The second imaginary line may be parallel to the inclined surface in a state where the lower assembly is rotated to the ice moving position.

The second imaginary line may be parallel to the inclined surface at a specific position before the lower assembly is rotated to the ice moving position.

The lower ejector further includes an ejector main body from which the lower ejector pin may protrude.

A distance between a portion of the lower tray contacting an end of the lower ejector pin and the ejector main body may be greater than a distance between the second imaginary line and the ejector main body in a state where the lower assembly is rotated to the ice moving position.

The upper assembly may further include an upper housing supporting the upper tray.

The ejector main body may be fixed to the upper housing.

Separate ice chambers may be defined by the upper tray and the lower tray. The lower ejector includes an ejector main body from which a plurality of lower ejector pins may protrude.

A length of a lower ejector pin of the plurality of lower ejector pins located at a position closest to the drive unit may be longer than a length of at least one of the remaining lower ejector pins.

Each of the lower ejector pins may include: a pin body extending from the ejector body; and a pressing portion extending from the pin body and pressing the lower tray.

The pin body may be formed in a curved shape. A groove portion may be formed in the pressing portion. The pin body may be provided with a groove portion extending in a longitudinal direction.

An ice maker according to still another aspect may include: an upper assembly provided with an upper tray having a hemispherical upper chamber; and a lower assembly provided with a lower tray having a hemispherical lower chamber.

Spherical ice may be generated from the upper and lower chambers, and the generated ice may be separated from the upper and lower chambers by rotating a lower assembly.

And, a lower ejector including a lower ejector pin for separating ice from the lower tray by pressing the lower tray when the lower assembly is rotated to be spaced apart from the upper assembly after ice making is completed may be included.

And, the lower ejector may include: an ejector main body coupled to the upper assembly; and a plurality of lower ejector pins protruding from the ejector main body.

Further, at least one of the plurality of lower ejector pins may be formed to have a length smaller than that of the lower ejector pin disposed at the periphery.

Also, the lower ejector pin may be formed in a curved shape.

Also, the lower ejector pin may be formed with a concave groove portion at an end portion contacting the lower tray.

The lower supporter may be formed with a lower opening through which the lower ejector pin passes.

Also, the lower ejector may be coupled to a vertical wall extending in a vertical direction at an upper case supporting an upper side of the upper tray.

The ejector body may have an inclined surface formed on a side thereof on which the lower ejector pin is formed.

Also, the vertical wall may form a cavity recessed rearward.

Guide insertion grooves may be formed in both sides of the cavity in the vertical direction, and guide protrusions may be formed in both sides of the ejector body, the guide protrusions being inserted into the guide insertion grooves to slide in the vertical direction.

The ejector body is provided with a fastening groove portion recessed rearward, and the top surface of the fastening groove portion is in surface contact with the top surface of the cavity and can be fastened by a fastening device.

And, a coupling groove part recessed upward is formed at a lower end of the vertical wall, an extension part protruding rearward is formed at a lower end of the ejector main body, and a top surface of the coupling groove part is in contact with a coupling step surface formed at an upper end of the extension part and can be fastened by a fastening means.

A refrigerator according to another aspect may include: a box body provided with a freezing chamber; a housing disposed at the freezing chamber; and an ice maker disposed within the housing.

The ice maker includes a lower ejector having a lower ejector pin that separates ice from a lower tray by pressing the lower tray when the lower assembly rotates to be spaced apart from the upper assembly after ice making is completed.

According to the proposed invention, since the lower ejector pin is formed in a curved shape in a length direction, the length of which is longer than the radius of the ice chamber, the pressing force of the lower ejector pin is sufficiently applied to the lower tray during the ice transfer, thereby enabling the ice to be smoothly separated from the lower tray.

Further, the pressing portion of the lower push-out pin includes a pressing inclined portion, and an upper end portion of the pressing inclined portion is first in contact with the lower tray and then a lower end portion thereof is in contact with the lower tray during ice transfer of the lower tray, so that the pressing inclined portion presses a central portion of the lower tray when the lower tray moves to the ice transfer position, thereby enabling ice to be smoothly separated from the lower tray.

Also, when the lower tray is moved to the ice moving position, the pressing slope part is in surface contact with a central portion of the lower tray, so that it is possible to prevent ice from being broken due to a local force applied to the ice.

Further, since the lower push-out pin is formed in a curved shape in the longitudinal direction, it is possible to prevent interference with a lower support that supports the lower tray during rotation of the lower tray.

In the state where the lower tray is moved to the ice transfer position, at least a part of a portion of the lower tray that is in contact with the lower push-out pin is located on the opposite side of the lower opening with respect to an imaginary line passing through a surface of the lower tray that is in contact with the upper tray.

Also, since one portion of the plurality of lower push-out pins is formed in a longer length than another portion, a load applied to a motor included in a driving unit providing a rotational power to the lower assembly is distributed by separating a time difference, thereby having an advantage of being able to reduce a load instantaneously applied to the motor.

Drawings

Fig. 1 is a perspective view of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a view illustrating a state in which the refrigerator door of fig. 1 is opened.

Fig. 3 and 4 are perspective views of an ice maker according to an embodiment of the present invention.

Fig. 5 is an exploded perspective view of an ice maker according to an embodiment of the present invention.

FIG. 6 is an upper perspective view of an upper housing of an embodiment of the present invention.

FIG. 7 is a lower perspective view of an upper housing of an embodiment of the present invention.

Fig. 8 is an upper perspective view of an upper tray according to an embodiment of the present invention.

Fig. 9 is a lower perspective view of an upper tray in accordance with an embodiment of the present invention.

Fig. 10 is a side view of an upper tray of an embodiment of the present invention.

FIG. 11 is an upper perspective view of an upper support member of an embodiment of the present invention.

FIG. 12 is a lower perspective view of an upper support member of an embodiment of the present invention.

Fig. 13 is an enlarged view illustrating a heater combining portion in the upper case of fig. 6.

Fig. 14 is a view showing a state in which the heater is coupled to the upper case of fig. 6.

Fig. 15 is a diagram showing the arrangement of electric wires connected to the heater in the upper housing.

Fig. 16 is a sectional view showing a state where the upper assembly is assembled.

Fig. 17 is a perspective view of a lower assembly of an embodiment of the present invention.

FIG. 18 is an upper perspective view of the lower housing of one embodiment of the present invention.

Fig. 19 is a lower perspective view of the lower housing of an embodiment of the present invention.

Fig. 20 is an upper perspective view of a lower tray according to an embodiment of the present invention.

Fig. 21 and 22 are lower perspective views of a lower tray according to an embodiment of the present invention.

Fig. 23 is a side view of a lower tray of an embodiment of the present invention.

FIG. 24 is an upper perspective view of a lower support of an embodiment of the present invention.

FIG. 25 is a lower perspective view of a lower support member of one embodiment of the present invention.

Fig. 26 is a sectional view showing a state where the lower assembly is assembled.

FIG. 27 is a top view of a lower support of an embodiment of the present invention.

Fig. 28 is a perspective view illustrating a state in which the lower heater is coupled to the lower supporter of fig. 27.

Fig. 29 is a view showing a state in which the electric wire connected to the lower heater penetrates the upper housing in a state in which the lower module is coupled to the upper module.

3 fig. 3 30 3 is 3a 3 sectional 3 view 3 taken 3 along 3 line 3a 3- 3a 3 of 3 fig. 33 3. 3

Fig. 31 is a diagram illustrating a state in which ice making is completed in fig. 30.

Fig. 32 is a bottom perspective view showing a state where the ice maker according to the embodiment of the present invention is separated from the lower ejector.

Fig. 33 and 34 are perspective views of the lower ejector in fig. 32 viewed from different directions.

Fig. 35 is a bottom perspective view illustrating a state where an ice maker according to another embodiment of the present invention is separated from a lower ejector.

Fig. 36 and 37 are perspective views of the lower ejector in fig. 35 viewed from different directions.

Fig. 38 is a bottom view of the lower ejector according to the embodiment of the present invention.

Fig. 39 is a sectional view taken along line B-B of fig. 3 in a water supply state.

Fig. 40 is a sectional view taken along line B-B of fig. 3 in an ice making state.

Fig. 41 is a sectional view taken along line B-B of fig. 3 in a state where ice making is completed.

Fig. 42 is a sectional view taken along line B-B of fig. 3 in an initial state of ice transfer.

Fig. 43 is a sectional view taken along line B-B of fig. 3 in a state where the lower push-out pin is in contact with the lower tray.

Fig. 44 is a sectional view taken along line B-B of fig. 3 in a state where ice transfer is completed.

Detailed Description

Fig. 1 is a perspective view of a refrigerator according to an embodiment of the present invention, and fig. 2 is a view illustrating a state in which a refrigerator door of fig. 1 is opened.

Referring to fig. 1 and 2, a refrigerator 1 according to an embodiment of the present invention may include: a case 2 forming a storage space; and a door for opening and closing the storage space.

In detail, the case 2 forms a storage space partitioned vertically by a partition, and may form a refrigerating chamber 3 at an upper portion and a freezing chamber 4 at a lower portion.

Storage members such as drawers, shelves, and housings may be provided inside the refrigerating chamber 3 and the freezing chamber 4.

The door may include a refrigerating chamber door 5 shielding the refrigerating chamber 3 and a freezing chamber door 6 shielding the freezing chamber 4.

The refrigerating chamber door 5 may be formed of a pair of right and left doors and opened and closed by rotation. The freezing chamber door 6 may be configured to be drawn out and pushed in a drawer type.

Of course, the configuration of the refrigerating chamber 3 and the freezing chamber 4 and the form of the door may be different according to kinds of refrigerators, and the present invention may be applied to various kinds of refrigerators without being limited thereto. For example, the freezing chamber 4 and the refrigerating chamber 3 may be arranged on the left and right, or the freezing chamber 4 may be positioned on the upper side of the refrigerating chamber 3.

An ice maker 100 may be provided at the freezing chamber 4. The ice maker 100 is used to make ice from supplied water, and can generate spherical ice.

An ice bank 102 may be further provided below the ice maker 100, and the ice bank 102 is stored after the made ice is moved from the ice maker 100.

The ice maker 100 and the ice bank 102 may also be installed inside the freezing chamber 4 in a state of being received in a separate housing 101.

The user can take the ice by opening the freezing chamber door 6 and approaching the ice bank 102.

As another example, the refrigerating chamber door 5 may be provided with a dispenser 7 for extracting purified water or made ice from the outside.

The ice generated at the ice maker 100 or the ice generated at the ice maker 100 and stored in the ice bank 102 is transferred to the dispenser 7 by a transfer device so that a user can obtain the ice from the dispenser 7, and hereinafter, the ice maker will be described in detail with reference to the accompanying drawings.

Fig. 3 and 4 are perspective views of an ice maker according to an embodiment of the present invention, and fig. 5 is an exploded perspective view of the ice maker according to an embodiment of the present invention.

Referring to fig. 3 to 5, the ice maker 100 may include an upper assembly 110 (or an upper tray assembly) and a lower assembly 200 (or a lower tray assembly).

The lower assembly 200 may rotate relative to the upper assembly 110. For example, the lower unit 200 may be rotatably connected to the upper unit 110.

The lower assembly 200 may generate spherical ice together with the upper assembly 110 in a state of being in contact with the upper assembly 110.

That is, the upper assembly 110 and the lower assembly 200 form an ice chamber 111 for generating spherical ice. The ice chamber 111 is a substantially spherical chamber.

It should be understood that the term "spherical or hemispherical" in the present invention includes not only a shape of a geometrically complete sphere or hemisphere, but also a shape geometrically similar to the complete sphere or hemisphere.

The upper assembly 110 and the lower assembly 200 may form a plurality of ice chambers 111 that are separated.

Hereinafter, a case where three ice chambers 111 are formed by the upper assembly 110 and the lower assembly 200 is exemplified, and it is to be understood that the number of the ice chambers 111 is not limited.

In a state where the ice chamber 111 is formed by the upper assembly 110 and the lower assembly 200, water may be supplied to the ice chamber 111 through the water supply part 190.

The water supply part 190 is coupled to the upper assembly 110 and guides water supplied from the outside to the ice chamber 111.

After ice making, the lower assembly 200 may be rotated in a forward direction. At this time, the spherical ice formed between the upper assembly 110 and the lower assembly 200 may be separated from the upper assembly 110 and the lower assembly 200.

The ice maker 100 may further include a driving unit 180 to enable the lower assembly 200 to rotate with respect to the upper assembly 110.

The driving unit 180 may include: a drive motor; and a power transmission portion for transmitting the power of the driving motor to the lower assembly 200. The power transmission portion may include one or more gears.

The driving motor may be a motor capable of bidirectional rotation. Thus, the lower assembly 200 can rotate bi-directionally.

The ice maker 100 may further include an upper ejector 300 to enable ice to be separated from the upper assembly 110.

The upper ejector 300 may separate ice, which is closely attached to the upper assembly 110, from the upper assembly 110.

The upper ejector 300 may include: an ejector main body 310; and a plurality of upper ejector pins 320 extending in a cross direction from the ejector main body 310.

The upper ejector pins 320 may be provided in the same number as the ice chambers 111.

Separation preventing protrusions 312 for preventing the ejector main body 310 from being separated from the coupling unit 350 in a state where the ejector main body 310 is coupled to the coupling unit 350, which will be described later, may be provided at both ends of the ejector main body 310.

As an example, a pair of separation preventing protrusions 312 may protrude in opposite directions from the ejector main body 310.

The ice in the ice chamber 111 may be pressed in a process in which the upper push-out pin 320 is introduced into the ice chamber 111 through the upper unit 110.

The ice pressed by the upper push-out pin 320 may be separated from the upper assembly 110.

Also, the ice maker 100 may further include a lower ejector 400 to separate the ice clinging to the lower assembly 200.

The lower ejector 400 may separate ice clinging to the lower assembly 200 from the lower assembly 200 by pressing the lower assembly 200. For example, the lower ejector 400 may be fixed to the upper assembly 110.

The lower ejector 400 may include: an ejector main body 410; and a plurality of lower ejector pins 420 protruding from the ejector main body 410. The lower ejector pins 420 may be provided in the same number as the ice chambers 111.

During the rotation of the lower assembly 200 for moving ice, the rotational force of the lower assembly 200 may be transmitted to the upper ejector 300.

To this end, the ice maker 100 may further include a connection unit 350 connecting the lower assembly 200 and the upper ejector 300. The connection unit 350 may include more than one link.

As an example, when the lower assembly 200 is rotated in one direction, the upper ejector 300 is lowered by the connection unit 350, so that the upper ejector pin 320 can press the ice.

On the contrary, when the lower assembly 200 is rotated in the other direction, the upper ejector 300 is lifted up to return to the original position by the coupling unit 350.

The upper assembly 110 and the lower assembly 200 will be described in further detail below.

The upper assembly 110 may include an upper tray 150 forming a portion of an ice chamber 111, the ice chamber 111 being used to make ice. As an example, the upper tray 150 defines an upper portion of the ice chamber 111. The upper tray 150 may be referred to as a first tray. Alternatively, the upper tray 150 may be referred to as an upper mold part (upper mold).

The upper assembly 110 may further include an upper support 170 for fixing the position of the upper tray 150.

For example, the upper support 170 may support the lower side of the upper tray 150 to restrict the lower side movement.

The upper assembly 110 may further include an upper housing 120 for fixing the position of the upper tray 150.

The upper tray 150 may be located at a lower side of the upper housing 120. A portion of the upper support 170 may be located at the lower side of the upper tray 150.

As described above, the upper case 120, the upper tray 150, and the upper support 170 aligned in the up-down direction may be fastened by the fastening members.

That is, the upper tray 150 may be fixed to the upper housing 120 by fastening of fastening members.

For example, the water supply unit 190 may be fixed to the upper case 120.

The ice maker 100 may further include a temperature sensor 500 for sensing the temperature of the upper tray 150.

For example, the temperature sensor 500 may be mounted on the upper case 120. When the upper tray 150 is fixed to the upper case 120, the temperature sensor 500 may contact the upper tray 150.

In addition, the lower assembly 200 may include a lower tray 250, and the lower tray 250 forms another portion of the ice chamber 111 for making ice. As an example, the lower tray 250 defines a lower portion of the ice chamber 111. The lower tray 250 may be referred to as a second tray. Alternatively, the lower tray 250 may be referred to as a lower mold part (lower mold part).

The lower assembly 200 may further include a lower support 270 supporting the underside of the lower tray 250.

The lower assembly 200 may further include a lower housing 210, at least a portion of the lower housing 210 covering an upper side of the lower tray 250.

The lower case 210, the lower tray 250, and the lower support 270 may be fastened by fastening members.

In addition, the ice maker 100 may further include a switch 600 for turning on/off the ice maker 100. When the user operates the switch 600 to the activated state, ice can be made through the ice maker 100.

That is, when the switch 600 is activated, it may be repeatedly performed: an ice making process of supplying water to the ice maker 100 to make ice using cold air; and an ice moving process of rotating the lower assembly 200 to separate ice.

In contrast, when the switch 600 is operated to the off state, ice cannot be made through the ice maker 100. For example, the switch 600 may be provided in the upper case 120.

< Upper case >

Fig. 6 is an upper perspective view of an upper housing according to an embodiment of the present invention, and fig. 7 is a lower perspective view of the upper housing according to an embodiment of the present invention.

Referring to fig. 6 and 7, the upper case 120 may be fixed to the outer case 101 in the freezing chamber 4 in a state where the upper tray 150 is fixed.

The upper housing 120 may include an upper plate 121 for fixing the upper tray 150.

The upper tray 150 may be fixed to the upper plate 121 in a state where a part of the upper tray 150 is in contact with the bottom surface of the upper plate 121.

The upper plate 121 may be provided with an opening 123 for penetrating a portion of the upper tray 150.

For example, in a state where the upper tray 150 is positioned below the upper plate 121, when the upper tray 150 is fixed to the upper plate 121, a portion of the upper tray 150 may protrude above the upper plate 121 through the opening 123.

Alternatively, the upper tray 150 may be exposed above the upper plate 121 through the opening 123, rather than protruding above the upper plate 121 through the opening 123.

The upper plate 121 may include a recess 122 formed to be recessed downward. The opening 123 may be formed at the bottom 122a of the recess 122.

Therefore, the upper tray 150 penetrating the opening 123 may be located in a space formed by the recess 122.

The upper case 120 may be provided with a heater combining part 124 for combining an upper heater (refer to 148 of fig. 14) for heating the upper tray 150 to move ice.

For example, the heater coupling part 124 may be provided on the upper plate 121. The heater combining part 124 may be located at a lower side of the recess 122.

The upper housing 120 may further include a pair of mounting

ribs

128, 129 for mounting the temperature sensor 500.

The pair of mounting

ribs

128, 129 are arranged to be spaced apart in the arrow B direction in fig. 7. The pair of mounting

ribs

128, 129 are configured to face each other, and the temperature sensor 500 may be located between the pair of mounting

ribs

128, 129.

The pair of mounting

ribs

128, 129 may be provided to the upper plate 121.

The upper plate 121 may be provided with a plurality of

insertion grooves

131, 132 for coupling with the upper tray 150.

A portion of the upper tray 150 may be inserted into the plurality of

insertion grooves

131, 132.

The plurality of

slots

131, 132 may include: a first upper slot 131; and a second upper insertion groove 132 located on the opposite side of the first upper insertion groove 131 with respect to the opening 123.

The opening 123 may be located between the first upper insertion groove 131 and the second upper insertion groove 132.

The first upper insertion groove 131 and the second upper insertion groove 132 may be spaced apart in the arrow B direction in fig. 7.

The plurality of first upper slots 131 may be arranged at intervals in an arrow a direction (referred to as a first direction) that intersects an arrow B direction (referred to as a second direction), but is not limited thereto.

Also, the plurality of second upper slots 132 may be arranged to be spaced apart in the arrow a direction.

In this specification, the arrow a direction is the same direction as the arrangement direction of the plurality of ice chambers 111.

For example, the first upper insertion groove 131 may be formed in a curved shape. Accordingly, the length of the first upper insertion groove 131 may be increased.

For example, the second upper insertion groove 132 may be formed in a curved shape. Accordingly, the length of the second upper insertion groove 132 may be increased.

When the length of each of the

upper slots

131 and 132 is increased, the length of the protrusion (formed at the upper tray) inserted into each of the

upper slots

131 and 132 may be increased, so that the coupling force of the upper tray 150 to the upper case 120 can be increased.

The distance from the first upper insertion groove 131 to the opening 123 and the distance from the second upper insertion groove 132 to the opening 123 may be different. For example, the distance from the second upper insertion groove 132 to the opening 123 may be formed shorter than the distance from the first upper insertion groove 131 to the opening 123.

Each of the

upper insertion grooves

131, 132 may be formed in an arc shape in a shape protruding from each of the

insertion grooves

131, 132 to the outside of the opening 123 when viewed from the opening 123.

The upper plate 121 may further include a sleeve 133 for inserting a fastening boss of the upper supporter 170, which will be described later.

The sleeve 133 may be formed in a cylindrical shape and may extend upward from the upper plate 121.

For example, a plurality of sleeves 133 may be provided on the upper plate 121. The plurality of sleeves 133 may be arranged to be spaced apart in the arrow a direction. The plurality of sleeves 133 may be arranged in a plurality of rows in the arrow B direction.

A part of the plurality of sleeves 133 may be positioned between adjacent two first upper insertion grooves 131.

Another part of the plurality of sleeves 133 may be disposed between the adjacent two second upper insertion grooves 132, or disposed to face a region between the two second upper insertion grooves 132.

The upper housing 120 may further include a plurality of hinge supports 135, 136 to enable the lower assembly 200 to rotate.

The plurality of hinge supports 135 and 136 may be arranged to be spaced apart in the arrow a direction with reference to fig. 7. A first hinge hole 137 may be formed on each

hinge support

135, 136.

For example, the plurality of

hinge supporters

135 and 136 may extend downward from the upper plate 121.

The upper case 120 may further include a vertical extension 140 vertically extending along the periphery of the upper plate 121. The vertical extension 140 may extend upward from the upper plate 121.

The vertical extension 140 may include more than one coupling hook 140 a. The upper case 120 may be hook-coupled with the case 101 by the coupling hook 140 a.

The water supply part 190 may be coupled to the vertical extension part 140.

The upper housing 120 may further include a horizontal extension 142 horizontally extending to the outside of the vertical extension 140.

The horizontal extension 142 may be provided with a screw fastening part 142a protruded to the outside to screw-fasten the upper case 120 to the outer case 101.

The upper housing 120 may further include a side peripheral portion 143. The side peripheral portion 143 may extend downward from the horizontal extension portion 142.

The side peripheral portion 143 may be configured to surround the periphery of the lower assembly 200. That is, the side peripheral portion 143 functions to prevent the lower assembly 200 from being exposed to the outside.

Although the upper case 120 is fastened to the separate casing 101 inside the freezing chamber 4 as described above, the upper case 120 may be directly fastened to a wall forming the freezing chamber 4, unlike this.

< Upper tray >

Fig. 8 is an upper perspective view of an upper tray according to an embodiment of the present invention, fig. 9 is a lower perspective view of an upper tray according to an embodiment of the present invention, and fig. 10 is a side view of an upper tray according to an embodiment of the present invention.

Referring to fig. 8 to 10, the upper tray 150 may be formed of a flexible material that is a non-metallic material such that it can be restored to an original shape after being deformed by an external force.

For example, the upper tray 150 may be formed of a silicon material. When the upper tray 150 is formed of a silicon material as in the present embodiment, the upper tray 150 is restored to an original shape again even if an external force deforms the shape of the upper tray 150 during ice moving, and thus, spherical ice can be formed even though ice making is repeated.

In the case where the upper tray 150 is formed of a metal material, if an external force is applied to the upper tray 150 to deform the upper tray 150 itself, the upper tray 150 cannot be restored to an original shape.

In this case, after the shape of the upper tray 150 is deformed, spherical ice cannot be generated. That is, spherical ice cannot be repeatedly generated.

In contrast, when the upper tray 150 has a flexible material that can be restored to an original shape as in the present embodiment, such a problem can be solved.

Also, when the upper tray 150 is formed of a silicon material, the upper tray 150 can be prevented from being melted or thermally deformed by heat supplied from an upper heater, which will be described later.

The upper tray 150 may include an upper tray body 151 forming an upper chamber 152 that is a part of the ice chamber 111. The upper tray main body 151 may also be referred to as an upper mold main body.

The upper tray body 151 may define a plurality of upper chambers 152.

As an example, the plurality of upper chambers 152 may define a first upper chamber 152a, a second upper chamber 152b, and a third upper chamber 152 c.

The upper tray main body 151 may include three chamber walls 153 forming three independent

upper chambers

152a, 152b, 152c, and the three chamber walls 153 may be formed integrally and connected to each other.

The first, second and third

upper chambers

152a, 152b, 152c may be aligned. For example, the first upper chamber 152a, the second upper chamber 152b, and the third upper chamber 152c may be arranged in the direction of arrow a with reference to fig. 9. The arrow a direction of fig. 9 is the same direction as the arrow a direction of fig. 7.

The upper chamber 152 may be formed in a hemispherical shape. That is, the upper portion of the spherical ice may be formed by the upper chamber 152.

An upper opening 154 for allowing water to flow into the upper chamber 152 may be formed at an upper side of the upper tray main body 151. For example, three upper openings 154 may be formed in the upper tray main body 151. The cold air may be guided to the ice chamber 111 through the upper opening 154.

During ice removal, the upper ejector 300 may be introduced into the upper chamber 152 through the upper opening 154.

In order to minimize deformation of the upper tray 150 at the upper opening 154 side during the introduction of the upper ejector 300 through the upper opening 154, an inlet wall 155 may be provided at the upper tray 150.

The inlet wall 155 is disposed along the outer periphery of the upper opening 154 and may extend upward from the upper tray main body 151.

The inlet wall 155 may be formed in a cylindrical shape. Therefore, the upper ejector 300 may pass through the upper opening 154 through the inner space of the inlet wall 155.

One or more first coupling ribs 155a may be provided along the periphery of the inlet wall 155 during the introduction of the upper ejector 300 into the upper opening 154 to prevent the deformation of the inlet wall 155.

The first coupling rib 155a may couple the inlet wall 155 and the upper tray body 151. For example, the first coupling rib 155a may be integrally formed with the outer periphery of the inlet wall 155 and the outer surface of the upper tray main body 151.

The plurality of first coupling ribs 155a may be disposed along the periphery of the inlet wall 155, but is not limited thereto.

The two inlet walls 155 corresponding to the second and third

upper chambers

152b and 152c may be connected by a second connection rib 162. The second connection rib 162 also serves to prevent deformation of the inlet wall 155.

A water supply guide 156 may be provided at the inlet wall 155 corresponding to any one of the three

upper chambers

152a, 152b, 152 c.

The water supply guide 156 may be formed at the inlet wall 155 corresponding to the second upper chamber 152b, but is not limited thereto.

The water supply guide 156 may be inclined from the inlet wall 155 in a direction away from the second upper chamber 152b more to the upper side.

The upper tray 150 may further include a first receiving part 160. The recess 122 of the upper case 120 may be received in the first receiving portion 160.

Since the heater coupling portion 124 is provided in the recess 122 and the upper heater (see 148 of fig. 14) is provided in the heater coupling portion 124, it can be understood that the upper heater (see 148 of fig. 14) is accommodated in the first accommodating portion 160.

The first receiving portion 160 may be configured in a shape surrounding the

upper chambers

152a, 152b, 152 c. The first receiving portion 160 may be formed by a top surface of the upper tray main body 151 being recessed downward.

The heater coupling portion 124 coupled to the upper heater (see 148 of fig. 14) may be accommodated in the first accommodation portion 160.

The upper tray 150 may further include a second receiving portion 161 (or may be referred to as a sensor receiving portion) in which the temperature sensor 500 is received.

For example, the second receiving portion 161 may be provided in the upper tray main body 151. The second receiving portion 161 may be formed to be recessed downward from the bottom of the first receiving portion 160, but is not limited thereto.

The second receiving portion 161 may be located between adjacent two upper chambers. As an example, fig. 8 shows a case where the second receiving portion 161 is located between the first upper chamber 152a and the second upper chamber 152 b.

Therefore, interference between the upper heater (refer to 148 of fig. 14) accommodated in the first accommodation part 160 and the temperature sensor 500 can be prevented.

In a state where the temperature sensor 500 is accommodated in the second accommodation portion 161, the temperature sensor 500 may contact an outer surface of the upper tray main body 151.

The chamber wall 153 of the upper tray body 151 may include a vertical wall 153a and a curved wall 153 b.

The curved wall 153b may be curved in a direction away from the upper chamber 152 toward the upper side.

The upper tray 150 may further include a horizontal extension 164 extending in a horizontal direction from the outer periphery of the upper tray main body 151. For example, the horizontal extension part 164 may extend along the outer circumference of the upper end edge of the upper tray main body 151.

The horizontal extension 164 may be in contact with the upper housing 120 and the upper support 170.

As an example, the bottom surface 164b (or may be referred to as a "first surface") of the horizontal extension 164 may contact the upper support 170, and the top surface 164a (or may be referred to as a "second surface") of the horizontal extension 164 may contact the upper housing 120.

At least a portion of the horizontal extension 164 may be located between the upper housing 120 and the upper support 170.

The horizontal extension 164 may include a plurality of

upper protrusions

165, 166 for being inserted into the plurality of

upper insertion grooves

131, 132, respectively.

The plurality of

upper protrusions

165, 166 may include: a first upper projection 165; and a second upper projection 166 located on the opposite side of the first upper projection 165 with respect to the upper opening 154.

The first upper protrusion 165 may be inserted into the first upper insertion groove 131, and the second upper protrusion 166 may be inserted into the second upper insertion groove 132.

The first and second

upper protrusions

165 and 166 may protrude upward from the top surface 164a of the horizontal extension 164.

The first upper protrusion 165 and the second upper protrusion 166 may be spaced apart in the arrow B direction in fig. 9. The arrow B direction of fig. 9 is the same direction as the arrow B direction of fig. 7.

The plurality of first upper protrusions 165 may be arranged to be spaced apart in the arrow a direction, but is not limited thereto.

Also, the plurality of second upper protrusions 166 may be arranged to be spaced apart in the arrow a direction.

For example, the first upper protrusion 165 may be formed in a curved shape. In addition, the second upper protrusion 166 may be formed in a curved shape, for example.

In the present embodiment, each of the

upper protrusions

165 and 166 not only couples the upper tray 150 with the upper housing 120, but also prevents the horizontally extending portion 164 from being deformed during an ice making process or an ice moving process.

At this time, when the

upper protrusions

165, 166 are formed in a curved shape, the interval with the upper chamber 152 in the length direction of the

upper protrusions

165, 166 is the same or almost the same, so that the deformation of the horizontal extension 164 can be effectively prevented.

For example, the horizontal extension 164 is minimized in horizontal deformation, thereby preventing the horizontal extension 164 from being elongated and plastically deformed. If the horizontal extension 164 is plastically deformed, the upper tray main body cannot be located at an accurate position when ice is made, and thus the shape of ice is not spherical.

The horizontal extension 164 may further include a plurality of

lower projections

167, 168. The plurality of

lower protrusions

167 and 168 may be inserted into lower insertion grooves of the upper supporter 170, which will be described later.

The plurality of

lower projections

167, 168 may include: a first lower projection 167; and a second lower projection 168 located on the opposite side of the first lower projection 167 with respect to the upper chamber 152.

The first and second

lower protrusions

167 and 168 may protrude downward from the bottom surface 164b of the horizontal extension portion 164.

The first lower protrusion 167 may be located on the opposite side of the first upper protrusion 165 with respect to the horizontal extension 164. The second lower protrusion 168 may be located on the opposite side of the second upper protrusion 166 with respect to the horizontal extension 164.

The first lower protrusions 167 may be disposed to be spaced apart from the vertical wall 153a of the upper tray main body 151. The second lower protrusion 168 may be disposed to be spaced apart from the curved wall 153b of the upper tray main body 151.

The plurality of

lower protrusions

167, 168 may also be formed in a curved shape. By forming the

projections

165, 166, 167, 168 on the top surface 164a and the bottom surface 164b of the horizontally extending portion 164, respectively, the horizontally extending portion 164 can be effectively prevented from being deformed in the horizontal direction.

The horizontal extension portion 164 may be provided with a through hole 169 for allowing a fastening boss of the upper support 170, which will be described later, to pass therethrough.

For example, a plurality of through holes 169 may be provided in the horizontal extension portion 164.

A portion of the plurality of through holes 169 may be positioned between adjacent two first upper protrusions 165 or adjacent two first lower protrusions 167.

Another portion of the plurality of through holes 169 may be disposed between the two second lower protrusions 168, or may be disposed to face a region between the two second lower protrusions 168.

< Upper support >

Fig. 11 is an upper perspective view of an upper support according to an embodiment of the present invention, and fig. 12 is a lower perspective view of the upper support according to an embodiment of the present invention.

Referring to fig. 11 and 12, the upper support 170 may include a support plate 171 contacting the upper tray 150.

For example, the top surface of the support plate 171 may contact the bottom surface 164b of the horizontally extending portion 164 of the upper tray 150.

The support plate 171 may be provided with a plate opening 172 for allowing the upper tray main body 151 to pass through.

A peripheral wall 174 bent upward may be provided at an edge of the support plate 171. As an example, the peripheral wall 174 may contact at least a portion of the lateral periphery of the horizontal extension 164.

The top surface of the peripheral wall 174 may be in contact with the bottom surface of the upper plate 121.

The support plate 171 may include a plurality of

lower slots

176, 177.

The plurality of

lower insertion grooves

176, 177 may include a first lower insertion groove 176 into which the first lower protrusion 167 is inserted and a second lower insertion groove 177 into which the second lower protrusion 168 is inserted.

The plurality of first lower insertion grooves 176 may be disposed in the support plate 171 at intervals in the arrow a direction. The plurality of second lower slots 177 may be spaced apart from each other in the direction of arrow a in the support plate 171.

The support plate 171 may further include a plurality of fastening bosses 175. The plurality of fastening bosses 175 may protrude upward from the top surface of the support plate 171.

Each of the fastening bosses 175 may pass through the through-hole 169 of the horizontal extension 164 to be introduced into the interior of the sleeve 133 of the upper case 120.

In a state where the fastening boss 175 is introduced into the interior of the sleeve 133, the top surface of the fastening boss 175 may be located at the same height as the top surface of the sleeve 133 or at a lower height.

As an example, the fastening member fastened to the fastening boss 175 may be a bolt (B1 of fig. 3). The bolt B1 may include a main body portion and a head portion formed to be larger than a diameter of the main body portion. The bolt B1 may be fastened to the fastening boss 175 from above the fastening boss 175.

During the process of fastening the body portion of the bolt B1 to the fastening boss 175, the assembly of the upper assembly 110 may be completed when the head portion contacts the top surface of the sleeve 133 or the head portion contacts the top surface of the sleeve 133 and the top surface of the fastening boss 175.

The upper supporter 170 may further include a plurality of unit guides 181, 182 for guiding the connection unit 350 connected to the upper ejector 300.

For example, the plurality of unit guides 181 and 182 may be arranged at intervals in the arrow a direction with reference to fig. 12.

The unit guides 181 and 182 may extend upward from the top surface of the support plate 171. Each of the unit guides 181 and 182 may be coupled to the peripheral wall 174.

Each of the unit guides 181, 182 may include a guide insertion groove 183 extending in an up-down direction.

The connection unit 350 is connected to the ejector main body 310 in a state where both ends of the ejector main body 310 of the upper ejector 300 penetrate the guide insertion groove 183.

Accordingly, during the rotation of the lower assembly 200, when the rotational force is transmitted to the ejector main body 310 by the connection unit 350, the ejector main body 310 may move up and down along the guide insertion groove 183.

< Upper Heater bonding Structure >

Fig. 13 is an enlarged view showing a heater coupling portion in the upper case of fig. 6, fig. 14 is a view showing a state where the heater is coupled to the upper case of fig. 6, and fig. 15 is a view showing an arrangement of electric wires connected to the heater in the upper case.

Referring to fig. 13 to 15, the heater combining part 124 may include a heater receiving groove 124a for receiving the upper heater 148.

For example, the heater receiving groove 124a may be formed by partially recessing the bottom surface of the recess 122 of the upper case 120 upward.

The heater receiving groove 124a may extend along the periphery of the opening 123 of the upper case 120.

As an example, the upper heater 148 may be a wire type heater. Accordingly, the upper heater 148 may be bent to correspond to the shape of the heater receiving groove 124a to receive the upper heater 148 in the heater receiving groove 124 a.

The upper heater 148 may be a DC heater that receives a DC power supply. The upper heater 148 may be activated to move ice. The upper heater 148 may be referred to as a heater for ice moving. When the heat of the upper heater 148 is transferred to the upper tray 150, the ice may be separated from the surface (inner surface) of the upper tray 150. At this time, the stronger the heat of the upper heater 148, the more opaque the portion of the spherical ice facing the upper heater 148 is compared to other portions. That is, an opaque band having a shape corresponding to the upper heater is formed at the periphery of the ice.

However, in the case of the present embodiment, the heat transferred to the upper tray 150 is reduced by using the DC heater having a low output itself, so that it is possible to prevent the formation of the opaque band at the periphery of the ice.

The upper heater 148 may be configured to surround the periphery of the plurality of upper chambers 152 such that the heat of the upper heater 148 can be uniformly transferred to each of the plurality of upper chambers 152 of the upper tray 150.

The upper heater 148 may be in contact with the periphery of each of a plurality of chamber walls 153 respectively forming the plurality of upper chambers 152. At this time, the upper heater 148 may be located at a lower position than the upper opening 154.

The heater receiving groove 124a is recessed in the recess 122, and thus, the heater receiving groove 124a may be defined by an outer wall 124b and an inner wall 124 c.

In a state where the upper heater 148 is received in the heater receiving groove 124a, the diameter of the upper heater 148 may be formed to be greater than the depth of the heater receiving groove 124a so that the upper heater 148 may protrude to the outside of the heater combining part 124.

In a state where the upper heater 148 is received in the heater receiving groove 124a, a portion of the upper heater 148 protrudes to the outside of the heater receiving groove 124a, and thus, the upper heater 148 may contact the upper tray 150.

A detachment prevention protrusion 124d may be provided at one or more of the outer wall 124b and the inner wall 124c to prevent the upper heater 148 received in the heater receiving groove 124a from being detached from the heater receiving groove 124 a.

As an example, fig. 13 shows a case where a plurality of separation preventing projections 124d are provided on the inner wall 124 c.

The separation preventing protrusion 124d may protrude from an end of the inner wall 124c toward the outer wall 124 b.

At this time, the protrusion length of the detachment prevention protrusion 124d may be formed to be 1/2 or less of the interval of the outer wall 124b and the inner wall 124c, so that the insertion of the upper heater 148 is not hindered by the detachment prevention protrusion 124d and the upper heater 148 is prevented from being easily detached from the heater receiving groove 124 a.

As shown in fig. 14, in a state where the upper heater 148 is received in the heater receiving groove 124a, the upper heater 148 may be divided into an upper arc portion 148c and a straight portion 148 d.

That is, the heater receiving groove 124a includes an upper circular arc portion and a straight portion, and the upper heater 148 may be divided into an upper circular arc portion 148c and a straight portion 148d corresponding to the upper circular arc portion and the straight portion of the heater receiving groove 124 a.

The upper circular arc portion 148c is a portion arranged along the outer periphery of the upper chamber 152, and is a portion curved in an arc shape in the horizontal direction.

The straight line portion 148d is a portion connecting the upper circular arc portion 148c corresponding to each upper chamber 152.

The upper heater 148 is positioned below the upper opening 154 so that a line connecting two spaced points of the upper arc portion can pass through the upper chamber 152.

The upper circular arc portion 148c of the upper heater 148 is highly likely to be disengaged from the heater receiving groove 124a, and thus, the disengagement preventing protrusion 124d may be configured to contact the upper circular arc portion 148 c.

A through opening 124e may be provided on a bottom surface of the heater receiving groove 124 a. When the upper heater 148 is received in the heater receiving groove 124a, a portion of the upper heater 148 may be positioned at the through opening 124 e. For example, the through opening 124e may be located at a portion facing the detachment prevention protrusion 124 d.

When the upper heater 148 is curved in an arc shape in a horizontal direction, the wire may be broken due to the increased tension of the upper heater 148, and the upper heater 148 may be separated from the heater receiving groove 124 a.

However, in the case where the heater receiving groove 124a forms the through opening 124e as in the present embodiment, a portion of the upper heater 148 may be positioned at the through opening 124e, thereby reducing the tension of the upper heater 148 and preventing the upper heater from being detached from the heater receiving groove 124 a.

As shown in fig. 15, the power input terminal 148a and the power output terminal 148b of the upper heater 148 may pass through the heater passage hole 125 formed in the upper housing 120 in a state where they are arranged in parallel.

The upper heater 148 is received in the lower side of the upper housing 120, and thus, the power input terminal 148a and the power output terminal 148b of the upper heater 148 may extend upward to pass through the heater passing hole 125.

The power input terminal 148a and the power output terminal 148b passing through the heater passing hole 125 may be connected to a first connector 129 a.

The first connector 129a may be connected to a second connector 129c, and the second connector 129c may be connected to two wires 129d connected to correspond to the power input terminal 148a and the power output terminal 148 b.

The upper heater 148, the first connector 129a, the second connector 129c, and the first guide portion 126 guiding the wire 129d may be provided on the upper plate 121 of the upper case 120.

As an example, fig. 15 shows that the first guide portion 126 guides the first connector 129 a.

The first guide portion 126 extends upward from the top surface of the upper plate 121, and an upper end portion may be bent in a horizontal direction.

Therefore, the bent portion of the upper side of the first guide portion 126 restricts the first connector 129a from moving in the upper direction.

The electric wire 129d may be led out to the outside of the upper case 120 after being bent in a substantially U-like shape to prevent interference with peripheral structures.

The electric wire 129d extends in a state of being bent more than once, and therefore, the upper case 120 may further include electric wire guides 127, 128 for fixing the position of the electric wire 129 d.

The wire guides 127 and 128 may include a first guide 127 and a second guide 128 arranged to be spaced apart in the horizontal direction. The first guide 127 and the second guide 128 may be bent in a direction corresponding to the bending direction of the wire 129d to minimize damage of the bent wire 129 d.

That is, the first guide 127 and the second guide 128 may include curved portions, respectively.

One or more of the first guide 127 and the second guide 128 may include an upper guide 127a extending toward the other guide to restrict the electric wire 129d between the first guide 127 and the second guide 128 from moving in an upper direction.

Referring to fig. 16, the upper case 120, the upper tray 150, and the upper supporter 170 may be coupled to each other in a state where the upper heater 148 is coupled to the heater coupling part 124 of the upper case 120.

The first upper protrusion 165 of the upper tray 150 is inserted into the first upper insertion groove 131 of the upper housing 120. And, the second upper protrusion 166 of the upper tray 150 is inserted into the second upper insertion groove 132 of the upper housing 120.

Then, the first lower protrusion 167 of the upper tray 150 is inserted into the first lower insertion groove 176 of the upper support 170, and the second lower protrusion 168 of the upper tray is inserted into the second lower insertion groove 177 of the upper support 170.

At this time, the fastening boss 175 of the upper support 170 is received in the sleeve 133 of the upper case 120 through the through hole 169 of the upper tray 150. In this state, the bolt B1 can be fastened to the fastening boss 175 from above the fastening boss 175.

In a state where the bolt B1 is fastened to the fastening boss 175, the head of the bolt B1 is positioned higher than the upper plate 121.

In contrast, the hinge supports 135, 136 are positioned lower than the upper plate 121, and thus, the upper assembly 110 or the connection unit 350 is prevented from interfering with the head of the bolt B1 during the rotation of the lower assembly 200.

In the process of assembling the upper assembly 110, the plurality of unit guides 181, 182 of the upper support 170 protrude above the upper plate 121 through-openings (139 a, 139b of fig. 6) located at both sides of the upper plate 121 in the upper case 120.

The upper ejector 300 penetrates the guide insertion groove 183 of the unit guides 181 and 182 protruding above the upper plate 121 in the above-described manner.

Accordingly, the upper ejector 300 descends in a state of being located at an upper side of the upper plate 121 and is introduced into the inside of the upper chamber 152, thereby separating the ice of the upper chamber 152 from the upper tray 150.

When the upper assembly 110 is assembled, the heater combining part 124 combined with the upper heater 148 is received in the first receiving part 160 of the upper tray 150.

In a state where the heater combining portion 124 is accommodated in the first accommodating portion 160, the upper heater 148 is in contact with the bottom surface 160a of the first accommodating portion 160.

In the case where the upper heater 148 is accommodated in the concave-shaped heater coupling part 124 and is in contact with the upper tray main body 151 as in the present embodiment, it is possible to minimize the amount of heat transferred from the upper heater 148 to other portions than the upper tray main body 151.

At least a portion of the upper heater 148 may be configured to overlap the upper chamber 152 in an up-down direction such that heat of the upper heater 148 is smoothly transferred to the upper chamber 152.

In the present embodiment, the upper arc portion 148c of the upper heater 148 may vertically overlap the upper chamber 152.

That is, the maximum distance between two points of the upper arc portion 148c located on the opposite sides to each other is formed smaller than the diameter of the upper chamber 152 with respect to the upper chamber 152.

< lower case >

Fig. 17 is a perspective view of a lower assembly according to an embodiment of the present invention, fig. 18 is an upper perspective view of a lower housing according to an embodiment of the present invention, and fig. 19 is a lower perspective view of the lower housing according to an embodiment of the present invention.

Referring to fig. 17-19, the lower assembly 200 may include a lower tray 250. The lower assembly 200 may further include a lower support 270 and a lower housing 210.

The lower tray 250 may form the ice chamber 111 together with the upper tray 150.

The lower assembly 200 may further include a lower support 270 supporting the lower tray 250. In a state where the lower tray 250 is seated on the lower support 270, the lower support 270 and the lower tray 250 may be rotated together.

The lower assembly 200 may further include a lower housing 210 for fixing the position of the lower tray 250.

The lower case 210 may surround the periphery of the lower tray 250, and the lower support 270 may support the lower tray 250.

The connection unit 350 may be coupled to the lower supporter 270.

The connection unit 350 may include: a first link 352 receiving power of the driving unit 180 for rotating the lower support 270; and a second link 356 connected to the lower supporter 270 for transmitting a rotational force of the lower supporter 270 to the upper ejector 300 when the lower supporter 270 rotates.

The first link 352 and the lower support 270 may be connected by an elastic member 360. For example, the elastic member 360 may be a coil spring.

The elastic member 360 has one end connected to the first link 352 and the other end connected to the lower supporter 270.

The elastic member 360 provides an elastic force to the lower support 270 to maintain the state in which the upper tray 150 is in contact with the lower tray 250.

In this embodiment, a first link 352 and a second link 356 may be provided at both sides of the lower support 270.

Any one of the two first links 352 is connected with the driving unit 180 to receive a rotational force from the driving unit 180.

The two first links 352 may be connected by a connecting shaft (370 of fig. 5).

A hole 358 through which the ejector main body 310 of the upper ejector 300 can pass may be formed at an upper end portion of the second link 356.

The lower case 210 may include a lower plate 211 for fixing the lower tray 250.

The lower tray 250 may be fixed in a state in which a portion thereof contacts the bottom surface of the lower plate 211.

The lower plate 211 may be provided with an opening 212 through which a part of the lower tray 250 passes.

For example, in a state where the lower tray 250 is positioned below the lower plate 211, when the lower tray 250 is fixed to the lower plate 211, a portion of the lower tray 250 may protrude above the lower plate 211 through the opening 212.

The lower housing 210 may further include a peripheral wall 214 (or a covering wall) penetrating the lower plate 211 to surround the lower tray 250.

The peripheral wall 214 may include a vertical wall 214a and a curved wall 215.

The vertical wall 214a is a wall vertically extending upward from the lower plate 211. The curved wall 215 is an arc-shaped wall which is further away from the opening 212 from the lower plate 211 toward the upper side.

The vertical wall 214a may include a first coupling slot 214b for coupling with the lower tray 250. The first coupling groove 214b may be formed by recessing an upper end of the vertical wall 214a downward.

The curved wall 215 may include a second coupling slot 215a for coupling with the lower tray 250.

The second coupling slot 215a may be formed by recessing an upper end of the curved wall 215 downward.

The lower case 210 may further include a first fastening boss 216 and a second fastening boss 217.

The first fastening boss 216 may protrude downward from a bottom surface of the lower plate 211. For example, the plurality of first fastening bosses 216 may protrude downward from the lower plate 211.

The plurality of first fastening bosses 216 may be arranged at intervals in the arrow a direction with reference to fig. 18.

The second fastening boss 217 may protrude downward from a bottom surface of the lower plate 211. As an example, a plurality of second fastening bosses 217 may protrude from the lower plate 211. The plurality of second fastening bosses 217 may be arranged to be spaced apart in the arrow a direction with reference to fig. 18.

The first fastening projection 216 and the second fastening projection 217 may be disposed to be spaced apart in the arrow B direction.

In the present embodiment, the length of the first fastening boss 216 and the length of the second fastening boss 217 may be formed to be different. For example, the length of the second fastening projection 217 may be formed to be longer than the length of the first fastening projection 216.

The first fastening member may be fastened to the first fastening boss 216 from an upper side of the first fastening boss 216. Conversely, a second fastening member may be fastened to the second fastening boss 217 from the lower side of the second fastening boss 217.

The curved wall 215 is provided with a moving groove 215b of a fastening member during the fastening of the first fastening member to the first fastening boss 216 so that the first fastening member does not interfere with the curved wall 215.

The lower housing 210 may further include a slot 218 for coupling with the lower tray 250.

A portion of the lower tray 250 may be inserted into the slot 218. The slot 218 may be located adjacent to the vertical wall 214 a.

For example, the plurality of slots 218 may be arranged at intervals in the arrow a direction in fig. 18. Each of the slots 218 may be formed in a curved shape.

The lower case 210 may further include a receiving groove 218a for inserting a portion of the lower tray 250. The receiving groove 218a may be formed by a portion of the lower plate 211 being recessed toward the curved wall 215.

The lower housing 210 may further include an extension wall 219, and the extension wall 219 contacts a portion of the side periphery of the lower plate 211 in a state of being combined with the lower tray 250. The extension wall 219 may extend in a linear shape in the arrow a direction.

< lower tray >

Fig. 20 is an upper perspective view of a lower tray according to an embodiment of the present invention, fig. 21 and 22 are lower perspective views of a lower tray according to an embodiment of the present invention, and fig. 23 is a side view of a lower tray according to an embodiment of the present invention.

Referring to fig. 20 to 23, the lower tray 250 may be formed of a flexible material that is a non-metal, and the lower tray 250 may be restored to an original shape after being deformed by an external force.

For example, the lower tray 250 may be formed of a silicon material. When the lower tray 250 is formed of a silicon material as in the present embodiment, the lower tray 250 may be restored to an original shape again even if an external force is applied to the lower tray 250 to deform the shape of the lower tray 250 during ice moving. Therefore, although ice is repeatedly made, spherical ice can be generated.

If the lower tray 250 is formed of a metal material, the lower tray 250 cannot be restored to an original shape again when an external force is applied to the lower tray 250 to deform the lower tray 250 itself.

In this case, after the shape of the lower tray 250 is deformed, spherical ice cannot be generated.

That is, spherical ice cannot be repeatedly generated.

In contrast, when the lower tray 250 has a flexible material that can be restored to an original shape as in the present embodiment, such a problem can be solved.

Also, when the lower tray 250 is formed of a silicon material, the lower tray 250 can be prevented from being melted or thermally deformed by heat supplied from a lower heater, which will be described later.

The lower tray 250 may include a lower tray body 251 forming a lower chamber 252 as a part of the ice chamber 111. The lower tray body 251 may also be referred to as a lower mold body.

The lower tray body 251 may define a plurality of lower chambers 252.

For example, the plurality of lower chambers 252 may include a first lower chamber 252a, a second lower chamber 252b, and a third lower chamber 252 c.

The lower tray body 251 may include three chamber walls 252d forming separate three

lower chambers

252a, 252b, 252c, and the three chamber walls 252d may be formed as a single body and form the lower tray body 251.

The first lower chamber 252a, the second lower chamber 252b, and the third lower chamber 252c may be aligned. For example, the first lower chamber 252a, the second lower chamber 252b, and the third lower chamber 252c may be arranged in the direction of arrow a with reference to fig. 20.

The lower chamber 252 may be formed in a hemispherical shape or a shape similar to a hemisphere. That is, a lower portion of the spherical ice may be formed by the lower chamber 252.

The lower tray 250 may further include a first extension portion 253 extending from an upper end edge of the lower tray main body 251 in a horizontal direction. The first extension 253 may be continuously formed along the outer circumference of the lower tray body 251.

The lower tray 250 may further include a peripheral wall 260 extending upward from the top surface of the first extension 253.

The bottom surface of the upper tray main body 151 may contact the top surface 251e of the lower tray main body 251. The top surface 251e of the lower tray main body 251 may also be referred to as an end surface (end surface).

The peripheral wall 260 may surround the upper tray body 151 disposed at the top surface 251e of the lower tray body 251.

The peripheral wall 260 may include: a first wall 260a surrounding the vertical wall 153a of the upper tray main body 151; and a second wall 260b surrounding the curved wall 153b of the upper tray body 151.

The first wall 260a is a vertical wall extending perpendicularly from the top surface of the first extension 253. The second wall 260b is a curved wall formed in a shape corresponding to the upper tray main body 151. That is, the second wall 260b may be curved in a direction away from the lower chamber 252 toward an upper side from the first extension 253.

The lower tray 250 may further include a second extension 254 extending in a horizontal direction from the peripheral wall 260.

The second extension 254 may be located at a higher position than the first extension 253. Accordingly, the first extension 253 and the second extension 254 form a step.

The second extension 254 may include a first upper projection 255 for insertion into the slot 218 of the lower housing 210. The first upper projection 255 may be disposed to be spaced apart from the peripheral wall 260 in a horizontal direction.

For example, the first upper projection 255 may protrude upward from the top surface of the second extension 254 at a position adjacent to the first wall 260 a.

The plurality of first upper protrusions 255 may be arranged at intervals in the arrow a direction with reference to fig. 20, but is not limited thereto. As an example, the first upper protrusion 255 may extend in a curved shape.

The second extension portion 254 may further include a first lower protrusion 257 for being inserted into a protrusion groove of a lower supporter 270, which will be described later. The first lower protrusion 257 may protrude downward from a bottom surface of the second extension portion 254.

The plurality of first lower protrusions 257 may be arranged at intervals in the arrow a direction, but is not limited thereto.

The first upper protrusion 255 and the first lower protrusion 257 may be located on opposite sides with respect to the upper and lower sides of the second extension portion 254. At least a portion of the first upper protrusion 255 may overlap the first lower protrusion 257 in the up-down direction.

A plurality of through holes 256 may be formed in the second extension 254.

The plurality of through-holes 256 may include: a first through hole 256a through which the first fastening boss 216 of the lower case 210 passes; and a second through hole 256b for passing the second fastening boss 217 of the lower case 210.

For example, the plurality of first through holes 256a may be arranged at intervals in the arrow a direction in fig. 20.

The plurality of second through holes 256b may be arranged at intervals in the arrow a direction in fig. 20.

The plurality of first through holes 256a and the plurality of second through holes 256b may be located on opposite sides with respect to the lower chamber 252.

A portion of the plurality of second through holes 256b may be positioned between adjacent two first upper protrusions 255. Also, a portion of the plurality of second through holes 256b may be positioned between the two first lower protrusions 257.

The second extension 254 may further include a second upper protrusion 258. The second upper protrusion 258 may be located on an opposite side of the first upper protrusion 255 from the lower cavity 252.

The second upper projection 258 may be disposed to be spaced apart from the peripheral wall 260 in a horizontal direction. For example, the second upper protrusion 258 may protrude upward from the top surface of the second extension 254 at a position adjacent to the second wall 260 b.

The plurality of second upper protrusions 258 may be disposed to be spaced apart in the arrow a direction of fig. 20, but is not limited thereto.

The second upper protrusion 258 may be received in the receiving groove 218a of the lower housing 210. In a state where the second upper protrusion 258 is received in the receiving groove 218a, the second upper protrusion 258 may contact the curved wall 215 of the lower case 210.

The peripheral wall 260 of the lower tray 250 may include a first coupling projection 262 for coupling with the lower housing 210.

The first coupling projection 262 may be projected in a horizontal direction from the first wall 260a of the peripheral wall 260. The first coupling projection 262 may be located at a lateral upper side of the first wall 260 a.

The first coupling projection 262 may include a neck portion 262a having a diameter smaller than other portions of the neck portion 262 a. The neck 262a may be inserted into a first coupling groove 214b formed at the peripheral wall 214 of the lower housing 210.

The peripheral wall 260 of the lower tray 250 may further include a second coupling protrusion 260c for coupling with the lower housing 210.

The second coupling projection 260c may protrude from the second wall 260b of the peripheral wall 260 in a horizontal direction. The second coupling projection 260c may be inserted into the second coupling groove 215a formed at the peripheral wall 214 of the lower housing 210.

The second extension 254 may further include a second lower projection 266. The second lower projection 266 may be positioned on an opposite side of the first lower projection 257 from the lower cavity 252.

The second lower protrusion 266 may protrude downward from the bottom surface of the second extension 254. For example, the second lower protrusion 266 may extend in a linear shape.

A portion of the first plurality of through holes 256a may be located between the second lower protrusion 266 and the lower chamber 252.

The second lower protrusions 266 may be received in guide grooves formed in a lower supporter 270 described later.

The second extension 254 may further include a side restriction 264. The side restricting part 264 restricts the horizontal movement of the lower tray 250 in a state where the lower tray 250 is coupled to the lower housing 210 and the lower support 270.

The side surface restriction portion 264 protrudes laterally from the second extension portion 254, and the vertical length of the side surface restriction portion 264 is formed to be greater than the thickness of the second extension portion 254. For example, a part of the side surface restricting portion 264 is located higher than the top surface of the second extending portion 254, and the other part is located lower than the bottom surface of the second extending portion 254.

Accordingly, a portion of the side surface restriction part 264 may contact with the side surface of the lower case 210, and another portion may contact with the side surface of the lower supporter 270.

< lower support >

Fig. 24 is an upper perspective view of a lower supporter according to an embodiment of the present invention, fig. 25 is a lower perspective view of the lower supporter according to an embodiment of the present invention, and fig. 26 is a sectional view showing a state where a lower assembly is assembled.

Referring to fig. 24 to 26, the lower supporter 270 may include a supporter body 271 supporting the lower tray 250.

The support body 271 may include three chamber receiving parts 272 for receiving the three chamber walls 252d of the lower tray 250. The chamber receiving portion 272 may be formed in a hemispherical shape.

The holder body 271 may include a lower opening 274, and the lower opening 274 may be used to pass the lower ejector 400 therethrough during ice moving. For example, the holder body 271 may be provided with three lower openings 274 corresponding to the three chamber receiving portions 272.

Reinforcing ribs 275 for reinforcing strength may be provided along the periphery of the lower opening 274.

Also, adjacent two of the three chamber receiving parts 272 may be connected by a connecting rib 273. Such a connection rib 273 may enhance the strength of the chamber-receiving portion 272.

The lower supporter 270 may further include a first extension wall 285 extending from an upper end of the supporter body 271 in a horizontal direction.

The lower support 270 may further include a second extension wall 286 stepped with the first extension wall 285 at an edge of the first extension wall 285.

The top surface of the second extension wall 286 may be located higher than the first extension wall 285.

The first extension portion 253 of the lower tray 250 may be disposed on the top surface 271a of the holder body 271, and the second extension wall 286 may surround the side surface of the first extension portion 253 of the lower tray 250. At this time, the second extension wall 286 may contact a side of the first extension 253 of the lower tray 250.

The lower support 270 may further include a protrusion groove 287 for receiving the first lower protrusion 257 of the lower tray 250.

The protrusion groove 287 may extend in a curved shape. For example, the protrusion groove 287 may be formed on the second extension wall 286.

The lower support 270 may further include a first fastening groove 286a to which the first fastening member B2 penetrating the first fastening boss 216 of the upper housing 120 is fastened.

For example, the first fastening slits 286a may be provided to the second extension wall 286.

The plurality of first fastening slits 286a may be disposed at intervals in the arrow a direction on the second extension wall 286. A portion of the plurality of first fastening slits 286a may be located between two protrusion grooves 287 adjacent to the first fastening slits 286 a.

The lower support 270 may further include a boss penetration hole 286b for penetrating the second fastening boss 217 of the upper housing 120.

For example, the boss penetration hole 286b may be provided in the second extension wall 286. A sleeve 286c may be provided around the second fastening boss 217 through the boss penetration hole 286b in the second extension wall 286. The sleeve 286c may be formed in a cylindrical shape having an open lower portion.

The first fastening member B2 may be fastened to the first fastening groove 286a after penetrating the first fastening boss 216 from above the lower case 210.

The second fastening member B3 may be fastened to the second fastening boss 217 from below the lower support 270.

The lower end of the sleeve 286c may be located at the same height as the lower end of the second fastening boss 217 or may be located lower than the lower end of the second fastening boss 217.

Accordingly, during the fastening of the second fastening member B3, the head of the second fastening member B3 may contact the second fastening boss 217 and the bottom surface of the sleeve 286c, or the bottom surface of the sleeve 286 c.

The lower support 270 may further include an outer wall 280, and the outer wall 280 may be disposed to surround the lower tray main body 251 in a state of being spaced apart from the outer side of the lower tray main body 251.

For example, the outer wall 280 may extend downward along an edge of the second extension wall 286.

The lower support 270 may further include a plurality of

hinge bodies

281, 282 for coupling with each

hinge support

135, 136 of the upper housing 120.

The plurality of

hinge bodies

281 and 282 may be arranged to be spaced apart from each other in the arrow a direction in fig. 24. Each hinge

main body

281, 282 may further include a second hinge hole 281 a.

The shaft connection portion 353 of the first link 352 may penetrate the second hinge hole 281 a. The connection shaft 370 may be connected to the shaft connection portion 353.

The spacing between the plurality of

hinge bodies

281, 282 is less than the spacing between the plurality of hinge supports 135, 136. Accordingly, the plurality of

hinge bodies

281, 282 may be located between the plurality of hinge supports 135, 136.

The lower supporter 270 may further include a coupling shaft 283, and the second link 356 is rotatably connected to the coupling shaft 283. The coupling shafts 283 may be respectively disposed on both sides of the outer wall 280.

The lower support 270 may further include an elastic member coupling part 284 for coupling the elastic member 360. The elastic member coupling part 284 may form a space capable of receiving a portion of the elastic member 360. The elastic member 360 is received in the elastic member coupling portion 284, whereby the elastic member 360 can be prevented from interfering with peripheral structures.

The elastic member coupling part 284 may include a catching part 284a for catching a lower end of the elastic member 360.

< bonding Structure of lower Heater >

Fig. 27 is a plan view of a lower supporter according to an embodiment of the present invention, fig. 28 is a perspective view illustrating a state in which a lower heater is coupled to the lower supporter of fig. 27, and fig. 29 is a view illustrating a state in which an electric wire connected to the lower heater penetrates an upper case in a state in which a lower module is coupled to an upper module.

Referring to fig. 27 to 29, the ice maker 100 of the present embodiment may further include a lower heater 296 for applying heat to the lower tray 250 during the ice making process.

The lower heater 296 applies heat to the lower chamber 252 during ice making such that ice begins to freeze from an upper side within the ice chamber 111.

Also, since the lower heater 296 generates heat during the ice making process, bubbles in the ice chamber 111 move downward during the ice making process, and when the ice making is completed, the other portions except for the lowermost end portion of the spherical ice can be made transparent. That is, according to the present embodiment, substantially transparent spherical ice can be generated.

For example, the lower heater 296 may be a wire type heater.

The lower heater 296 may be disposed at the lower support 270. The lower heater 296 may be in contact with the lower tray 250 to provide heat to the lower chamber 252.

For example, the lower heater 296 may be in contact with the lower tray main body 251. The lower heater 296 may be configured to surround the three chamber walls 252d of the lower tray body 251.

The lower support 270 may further include a heater combining part 290 for combining the lower heater 296.

The heater combining part 290 may include a heater receiving groove 291 recessed downward from the chamber receiving part 272 of the lower tray body 251.

The heater combining part 290 may include an inner wall 291a and an outer wall 291b by the recess of the heater receiving groove 291.

For example, the inner wall 291a may be formed in a ring shape, and the outer wall 291b may be disposed to surround the inner wall 291 a.

When the lower heater 296 is received in the heater receiving groove 291, the lower heater 296 may surround at least a portion of the inner wall 291 a.

The lower opening 274 may be located at a region formed by the inner wall 291 a. Accordingly, when the chamber wall 252d of the lower tray 250 is received in the chamber receiving part 272, the chamber wall 252d may contact the top surface of the inner wall 291 a. The top surface of the inner wall 291a is an arc-shaped surface corresponding to the hemispherical chamber wall 252 d.

In a state where the lower heater 296 is accommodated in the heater accommodating groove 291, a diameter of the lower heater 296 may be formed to be larger than a recessed depth of the heater accommodating groove 291 such that a portion of the lower heater 296 protrudes to the outside of the heater accommodating groove 291.

A detachment prevention protrusion 291c may be provided at one or more of the outer wall 291b and the inner wall 291a to prevent the lower heater 296 accommodated in the heater accommodating groove 291 from being detached from the heater accommodating groove 291.

Fig. 27 shows that the escape prevention projection 291c is provided on the inner wall 291 a.

The inner wall 291a has a diameter smaller than that of the chamber-accommodating part 272, and thus, the lower heater 296 moves along the surface of the chamber-accommodating part 272 and is accommodated in the heater-accommodating groove 291 during the assembly of the lower heater 296.

That is, the lower heater 296 is accommodated in the heater accommodating groove 291 from above the outer wall 291b toward the inner wall 291 a. Therefore, the escape prevention protrusion 291c is preferably formed on the inner wall 291a to prevent the lower heater 296 from interfering with the escape prevention protrusion 291c during the process of being received in the heater receiving groove 291.

The escape prevention protrusion 291c may be protruded from an upper end portion of the inner wall 291a toward the outer wall 291 b.

The protruding length of the escape prevention protrusion 291c may be formed to be 1/2 or less of the interval of the outer wall 291b and the inner wall 291 a.

As shown in fig. 28, in a state where the lower heater 296 is accommodated in the heater accommodating groove 291, the lower heater 296 may be divided into a lower circular arc portion 296a and a linear portion 296 b.

The lower circular arc portion 296a is a portion disposed along the outer periphery of the lower chamber 252, and is curved in an arc shape in the horizontal direction.

The linear portion 296b is a portion connecting the lower circular arc portions 296a corresponding to the respective lower chambers 252.

In the lower heater 296, there is a high possibility that the lower circular arc portion 296a is disengaged from the heater receiving groove 291, and therefore, the disengagement prevention protrusion 291c may be configured to contact the lower circular arc portion 296 a.

A through opening 291d may be provided on a bottom surface of the heater receiving groove 291. When the lower heater 296 is received in the heater receiving groove 291, a portion of the lower heater 296 may be located at the through opening 291 d. As an example, the through opening 291d may be located at a portion facing the escape prevention protrusion 291 c.

When the lower heater 296 is curved in an arc shape in a horizontal direction, a wire may be broken due to an increase in tension of the lower heater 296, and the lower heater 296 may be likely to be detached from the heater receiving groove 291.

However, in the case where the heater receiving groove 291 forms the through opening 291d as in the present embodiment, a portion of the lower heater 296 may be located at the through opening 291d, thereby reducing the tension of the lower heater 296 and preventing the phenomenon that the lower heater 296 is detached from the heater receiving groove 291.

The lower support 270 may include: a first guide groove 293 for guiding the power input terminal 296c and the power output terminal 296d of the lower heater 296 accommodated in the heater accommodating groove 291; and a second guide groove 294 extending in a direction crossing the first guide groove 293.

For example, the first guide groove 293 may extend in the direction of arrow B from the heater accommodating groove 291.

The second guide groove 294 may extend from an end of the first guide groove 293 in the arrow a direction. In the present embodiment, the arrow a direction is a direction parallel to the extending direction of the rotation center axis C1 of the lower assembly 200.

Referring to fig. 28, the first guide groove 293 may extend from any one of the left and right chamber accommodating parts except for the central part among the three chamber accommodating parts.

Fig. 28 shows, as an example, a case where the first guide groove 293 extends from the left chamber accommodating portion of the three chamber accommodating portions.

As shown in fig. 28, the power input terminal 296c and the power output terminal 296d of the lower heater 296 may be accommodated in the first guide groove 293 in a side-by-side arrangement.

The power input 296c and the power output 296d of the lower heater 296 may be connected to a first connector 297 a.

The first connector 297a may be connected to a second connector 297b, and two wires 298 connected to the second connector 297b in a manner corresponding to the power input terminal 296c and the power output terminal 296 d.

In the present embodiment, the first and

second connectors

297a and 297b are accommodated in the second guide groove 294 in a state where the first and

second connectors

297a and 297b are connected.

The electric wire 298 connected to the second connector 297b is drawn out from the end of the second guide groove 294 to the outside of the lower support 270 through a drawing-out insertion groove 295 formed in the lower support 270.

According to the present embodiment, the first and

second connectors

297a and 297b are received in the second guide groove 294, and thus, there is an advantage in that the first and

second connectors

297a and 297b are not exposed to the outside when the assembly of the lower assembly 200 is completed.

As described above, if the first and

second connectors

297a and 297b are not exposed to the outside, the first and

second connectors

297a and 297b are prevented from interfering with a peripheral structure and from being separated from the second connector 297b during the rotation of the lower assembly 200.

Also, the first and

second connectors

297a and 297b are received in the second guide groove 294, and thus, a portion of the wire 298 is positioned in the second guide groove 294 and the other portion is positioned outside the lower support 270 through the lead-out socket 295.

At this time, the second guide groove 294 extends in a direction parallel to the rotation center axis C1 of the lower assembly 200, and thus, a portion of the wire 298 also extends in a direction parallel to the rotation center axis C1.

The other part of the wire 298 extends from the outside of the lower support 270 in a direction crossing the rotation center axis C1.

According to this arrangement of the wire 298, during the rotation of the lower assembly 200, almost no tensile force is applied to the wire 298, and a torsional force (torque) is applied.

In the case where the twisting force is applied, the possibility of breakage of the wire 298 is very low as compared with the case where a tensile force is applied to the wire 298.

In the case of this embodiment, the lower heater 296 maintains a fixed position during the rotation of the lower assembly 200 and applies a twisting force to the electric wire 298, and therefore, it is possible to prevent the lower heater 296 from being damaged and to prevent the electric wire 298 from being broken.

A disengagement prevention protrusion 293a for preventing the lower heater 296 or the wire 298 received therein from being disengaged may be provided at one or more of the first guide groove 293 and the second guide groove 294.

The power input terminal 296c and the power output terminal 296d of the lower heater 296 are located at the first guide groove 293. At this time, heat is also generated at the power input terminal 296c and the power output terminal 296d, and therefore, the heat supplied to the chamber accommodating portion on the left side where the first guide groove 293 extends is larger than the heat supplied to the other chamber accommodating portions.

In this case, if the amount of heat supplied to each of the chamber receiving parts is different, the transparency of the manufactured spherical ice may also be different from ice to ice after the ice making and the ice moving are completed.

Therefore, a detouring accommodating groove 292 may be further provided in a chamber accommodating part (e.g., a right chamber accommodating part) farthest from the first guide groove 293 among the three chamber accommodating parts to minimize a case where a difference in transparency of each ice becomes large.

For example, the bypass accommodating groove 292 may be formed to extend outward from the heater accommodating groove 291, be bent, and then be connected to the heater accommodating groove 291.

When the part 296e of the lower heater 296 is additionally accommodated in the bypass accommodating groove 292, a contact area between the chamber wall of the chamber accommodating portion 272 accommodated in the right side and the lower heater 296 can be increased.

Therefore, a projection 292a for fixing the position of the lower heater accommodated in the bypass accommodating groove 292 may be additionally provided in the chamber accommodating portion 272 on the right side.

Referring to fig. 29, in a state where the lower unit 200 is coupled to the upper housing 120 of the upper unit 110, the wire 298 drawn out to the outside of the lower supporter 270 passes through the wire insertion groove 138 formed in the upper housing 120, and may extend upward of the upper housing 120.

The wire insertion slot 138 may be provided with a restricting guide 139 for restricting movement of the wire 298 inserted through the wire insertion slot 138. The restricting guide 139 is formed in a shape bent a plurality of times, and the wire 298 may be located in an area where the restricting guide is formed.

3 fig. 3 30 3 is 3a 3 sectional 3 view 3 taken 3 along 3 line 3a 3- 3a 3 of 3 fig. 33 3, 3 and 3 fig. 3 31 3 is 3a 3 view 3 illustrating 3a 3 state 3 in 3 which 3 ice 3 generation 3 is 3 completed 3 in 3 fig. 3 30 3. 3

Fig. 30 shows a state where the upper tray and the lower tray are in contact with each other.

First, referring to fig. 30, the ice chamber 111 is completed by the upper tray 150 and the lower tray 250 contacting in the up-down direction.

The bottom surface 151a of the upper tray main body 151 is in contact with the top surface 251e of the lower tray main body 251. In this embodiment, the bottom surface 151a of the upper tray main body 151 is referred to as a first contact surface, and the top surface 251e of the lower tray main body 251 is referred to as a second contact surface.

At this time, the elastic force of the elastic member 360 is applied to the lower supporter 270 in a state where the top surface 251e of the lower tray main body 251 is in contact with the bottom surface 151a of the upper tray main body 151.

The elastic force of the elastic member 360 is applied to the lower tray 250 through the lower support 270, so that the top surface 251e of the lower tray main body 251 presses the bottom surface 151a of the upper tray main body 151.

Therefore, in a state where the top surface 251e of the lower tray main body 251 is in contact with the bottom surface 151a of the upper tray main body 151, the surfaces are pressed against each other, thereby increasing the adhesion force.

As described above, when the close contact force between the top surface 251e of the lower tray main body 251 and the bottom surface 151a of the upper tray main body 151 is increased, since there is no gap between the two surfaces, it is possible to prevent the formation of thin band-shaped ice along the outer periphery of the spherical ice after the ice making is completed.

The first extension 253 of the lower tray 250 is disposed at the top surface 271a of the support body 271 of the lower support 270. The second extension wall 286 of the lower support 270 contacts the side of the first extension 253 of the lower tray 250.

The second extension 254 of the lower tray 250 may be disposed at the second extension wall 286 of the lower support 270.

The upper tray main body 151 may be received in an inner space of the peripheral wall 260 of the lower tray 250 in a state that the bottom surface 151a of the upper tray main body 151 is seated on the top surface 251e of the lower tray main body 251.

At this time, the vertical wall 153a of the upper tray main body 151 is disposed to face the vertical wall 260a of the lower tray 250, and the curved wall 153b of the upper tray main body 151 is disposed to face the second wall 260b of the lower tray 250.

The outer surface of the chamber wall 153 of the upper tray body 151 is spaced from the inner surface of the peripheral wall 260 of the lower tray 250. That is, a space is formed between an outer surface of the chamber wall 153 of the upper tray main body 151 and an inner surface of the peripheral wall 260 of the lower tray 250.

Water supplied through the water supply part 190 is contained in the ice chamber 111, and when the amount of water supplied is greater than the volume of the ice chamber 111, water that cannot be contained in the ice chamber 111 is stored in a space between the outer surface of the chamber wall 153 of the upper tray body 151 and the inner surface of the peripheral wall 260 of the lower tray 250.

Therefore, according to the present embodiment, even if the amount of water supplied is greater than the volume of the ice chamber 111, water can be prevented from overflowing from the ice maker 100.

In addition, the lower tray main body 251 may be further provided with a heater contact portion 251a for increasing a contact area with the lower heater 296.

The heater contact part 251a may protrude from a bottom surface of the lower tray main body 251. For example, the heater contact part 251a may be formed in a ring shape on the bottom surface of the lower tray main body 251. The bottom surface of the heater contact 251a may be a flat surface.

The lower tray main body 251 may further include a protrusion 251b formed to protrude upward at a portion of a lower side thereof. That is, the convex portion 251b may be configured to protrude toward the inside of the ice chamber 111.

A recess 251c is formed at a lower side of the projection 251b such that the thickness of the projection 251b is substantially the same as that of the other portion of the lower tray body 251.

In this specification, "substantially the same" is meant to include the concepts that are identical and, although not identical, are nearly indistinguishable.

The convex portion 251b may be disposed to face the lower opening 274 of the lower support 270 in the up-down direction.

The lower opening 274 may be located vertically below the lower chamber 252. That is, the lower opening 274 may be positioned vertically below the projection 251 b.

The diameter D1 of the convex portion 251b may be formed smaller than the diameter D2 of the lower opening 274.

In a state where water is supplied to the ice chamber 111, when cold air is supplied to the ice chamber 111, the water in a liquid state is changed into ice in a solid state. At this time, the water expands during the water phase changes into ice, and the expansion force of the water is transmitted to the upper tray body 151 and the lower tray body 251, respectively.

In the case of the present embodiment, another portion of the lower tray main body 251 is surrounded by the support main body 271, and a portion (hereinafter, referred to as a "corresponding portion") corresponding to the lower opening 274 of the support main body 271 is not surrounded.

If the lower tray body 251 is formed in a complete hemispherical shape, in the case where the expansion force of the water is applied to a portion of the lower tray body 251 corresponding to the lower opening 274, the corresponding portion of the lower tray body 251 is deformed toward the lower opening 274 side.

In this case, the water supplied to the ice chamber 111 exists in a spherical shape before ice making, but additional ice of a convex shape corresponding to a space generated due to deformation of the corresponding portion is generated on the spherical ice due to deformation of the corresponding portion of the lower tray body 251 after the generation of ice is completed.

Therefore, in the present embodiment, in consideration of the deformation of the lower tray body 251, a convex portion 251b is formed at the lower tray body 251 so that the ice is made as close to a perfect sphere as possible.

In the case of this embodiment, before ice making, the water supplied to the ice chamber 111 does not have a spherical shape, but after the ice making is completed, the convex portion 251b of the lower tray main body 251 is deformed toward the lower opening 274 side, and thus spherical ice may be generated.

In the present embodiment, the diameter D1 of the convex portion 251b is formed to be smaller than the diameter D2 of the lower opening 274, and therefore, the convex portion 251b can be deformed and positioned inside the lower opening 274.

Fig. 32 is a bottom perspective view illustrating a state in which an ice maker according to an embodiment of the present invention is separated from a lower ejector, and fig. 33 and 34 are perspective views of the lower ejector in fig. 32 viewed from different directions.

Fig. 35 is a bottom perspective view illustrating a state where an ice maker according to another embodiment of the present invention is separated from a lower ejector, and fig. 36 and 37 are perspective views of the lower ejector in fig. 35 viewed from different directions. Fig. 38 is a bottom view of the lower ejector according to the embodiment of the present invention.

< lower ejector >

As described above, the ice maker 100 may further include a lower ejector 400 to enable separation of ice clinging to the lower assembly 200.

In detail, after the ice making is completed, when the lower block 200 is spaced apart from the upper block 110 and rotated, the lower ejector 400 can separate the ice adhered to the lower block 200 from the lower block 200 by pressing the lower block 200. At this time, the lower ejector 400 may press the lower tray 250.

For example, the lower ejector 400 may be fixed to the upper assembly 110.

The lower ejector 400 may include: a lower ejector main body 410; and a plurality of lower ejector pins 420 protruding from the lower ejector main body 410. The lower ejector pins 420 may be provided in the same number as the ice chambers 111.

For example, the lower ejector 400 may be coupled to the upper housing 120.

The lower ejector main body 410 may be coupled to a support wall 120a extending in a vertical direction from the upper housing 120. The lower ejector body 410 may be detachably assembled to the support wall 120 a.

Also, the lower ejector main body 410 may include a surface parallel to the support wall 120 a.

The lower ejector body 410 may include an inclined surface 410a, and the inclined surface 410a may be formed at a side facing the lower tray 250 with reference to the support wall 120 a. The lower ejector pin 420 may extend from the inclined surface 410 a.

For example, the inclined surface 410a may be inclined with respect to a vertical line.

In addition, in a state where the lower unit 200 is rotated to the lower ejector 400 side, the inclined surface 410a may be inclined at an angle corresponding to the inclination of the lower unit 200 to move ice.

As an example, in a state where the lower assembly 200 is moved to the ice separating position, the inclined surface 410a may be substantially parallel to a second imaginary line (L2 in fig. 44) passing through the top surface 251e (or the second contact surface) of the lower tray 250 to perform ice separation.

In the state where the lower assembly 200 is moved to the ice moving position, the lower ejector pin may intersect the second imaginary line to perform ice moving.

Alternatively, the inclined surface 410a may be parallel to a second imaginary line (L2 in fig. 44) passing through the top surface 251e (or the second contact surface) of the lower tray 250 at a prescribed angle before the lower assembly 200 moves to the ice moving position to perform ice moving.

The support wall 120a may be formed integrally with the upper case 120, or may be provided separately from the upper case 120.

Also, the supporter body 271 may include a lower opening 274, and the lower opening 274 may be used to pass the lower ejector 400 therethrough during the ice moving. The lower opening 274 may be formed at each chamber receiving portion 272.

The lower push-out pins 420 may be formed in the same number as the lower chamber 252 formed in the lower tray 250, the chamber housing portion 272 housing the lower chamber 252, and the lower opening 274 formed in the chamber housing portion 272.

As an example, the lower tray 250 may be formed with three lower chambers 252. Three chamber receiving portions 272 are formed at the holder body 271 to receive the three lower chambers 252, respectively, and a lower opening 274 may be provided at each chamber receiving portion 272. The lower ejector pins 420 may also be provided in three so that they press the three lower chambers 252 through each of the lower openings 274.

Therefore, when the lower assembly 200 is rotated to the lower ejector 400 side in a state where the lower ejector 400 is fixed, the lower ejector pin 420 penetrates the lower opening 274 and can press the lower tray 250. The lower tray 250 is deformed by the pressing force of the lower push-out pin 420, and the ice of the lower chamber 252 may be separated from the lower tray 250.

The plurality of lower ejector pins 420 may include a first ejector pin 421, a second ejector pin 422, and a third ejector pin 423.

Any one of the first to third ejector pins 421, 422, 423 may have a length longer than the other.

For example, the third ejector pin 423 located near the driving unit 180 among the first to third ejector pins 421, 422, 423 may be formed to have a length longer than the first ejector pin 421 and the second ejector pin 422.

As described above, if any one of the ejector pins 421, 422, 423 is formed to have a long length, the load applied to the motor can be reduced when moving ice.

In detail, when the length of the third push-out pin 423 of the plurality of push-out

pins

421, 422, 423 is formed to be long, the lower tray 250 contacts the third push-out pin 423 first and then contacts the remaining two push-out

pins

421, 422 during the rotation of the lower assembly 200.

As the lower assembly 200 continues to rotate, the third ejector pin 423 presses the lower tray 250, and the remaining two

ejector pins

421, 422 subsequently press the lower tray 250.

After the ice of the lower tray 250, which is previously pressed by the third push-out pin 423, is separated from the surface of the lower tray 250, the ice of the lower tray 250, which is subsequently pressed by the two push-out

pins

421, 422, may be separated from the surface of the lower tray 250.

That is, the ice of the lower tray 250 may be sequentially separated from the surface of the lower tray 250.

Accordingly, the load applied to the motor included in the driving unit 180 providing the rotational power to the lower assembly 200 is distributed by the time difference, so that the load instantaneously applied to the motor can be reduced.

In particular, since the third ejector pin 423 located at a position close to the driving unit 180 among the first to third ejector pins 421, 422, 423 presses the ice first, it is possible to prevent an increase in load applied to the motor at the initial stage of the motor operation.

In contrast, when the three push-out

pins

421, 422, 423 are formed to have the same length, the lower tray 250 may simultaneously contact the three lower push-out

pins

421, 422, 423 during the rotation of the lower assembly 200.

When the lower assembly 200 is continuously rotated, the three

ejector pins

421, 422, 423 simultaneously press the lower tray 250 to deform the lower tray 250, and the pressing forces of the three

ejector pins

421, 422, 423 are transmitted to the ice, so that three pieces of ice can be almost simultaneously separated from the surface of the lower tray 250.

At this time, the load applied to the motor included in the driving unit 180 can only be increased.

The lower ejector pin 420 may include: a pin body 420a protruding from the lower ejector body 410; and a pressing portion 420b formed to extend from the pin body 420 a.

For example, the pin body 420a and the pressing part 420b may be bent to form a predetermined angle, and the pressing part 420b may extend from the pin body 420a to press the central portion of the lower tray 250.

For example, the pin body 420a may be formed in a curved shape, and may be formed to be inclined downward from one side connected to the lower ejector body 410 toward the other side.

As another example, the pin body 420a may be inclined downward from one side connected to the lower ejector body 410 toward the other side, and have at least a portion thereof formed in an arc shape in a curve shape.

As still another example, the pin body 420a may be inclined downward from one side connected to the lower ejector body 410 toward the other side, and at least a portion thereof may be formed in a curved shape to be located on an extension line of the rotation trajectory of the lower assembly 200.

The center of curvature of at least a portion of the lower ejector pin 420 in the length direction may coincide with the center of rotation C2 of the lower assembly 200.

The pressing part 420b extends from the pin body 420a, and may be formed to contact a central portion of the lower tray 250 to be pressed when the lower assembly 200 is rotated for ice transfer.

In detail, the pressing part 420b may be connected to the pin body 420a at a predetermined angle so as to increase an area contacting the central portion of the lower tray 250.

The pressing part 420b may include a pressing inclined part 420c contacting the lower tray 250.

For example, since the length of the upper end portion 420d of the pressing portion 420b is formed longer than the length of the lower end portion 420e, the pressing inclined portion 420c may be formed.

The upper end portion 420d is located closer to the upper tray 150 than the lower end portion 420 e.

The pressing slope part 420c may be formed such that an upper end part of the pressing slope part 420c is first brought into contact with the lower tray 250 during ice transfer.

If the lower tray 250 rotates in a state where the pressing portion 420b does not have the pressing inclined portion 420c, the lower end portion of the pressing portion 420b first comes into contact with the lower tray 250.

In this case, in a state where only a portion of the pressing part 420b presses the lower tray 250 or the lower tray 250 rotates to the ice transfer position, the lower tray 250 is deformed at a position spaced apart from the central portion of the lower tray 250, and thus the ice transfer performance of ice may be degraded.

However, when the pressing inclined part 420c is formed at the pressing part 420b as in the present embodiment, the upper end part 420d of the pressing inclined part 420c first comes into contact with the lower tray 250 during the rotation of the lower tray 250.

The end surface of the pressing portion 420b may be parallel to a tangent line (tangent line) or a vertical line of the outer circumferential surface of the lower tray 250 at a point where the pressing portion 420b initially contacts the lower tray 250.

The upper end portion 420d contacts a position spaced apart from the central portion of the upper tray 150, but when the rotation angle of the lower tray 250 is increased, the upper end portion 420d and the lower end portion 420e contact the lower tray 250 together. When the upper end portion 420d and the lower end portion 420e are brought into contact with the lower tray 250 together, the pressing inclined portion 420c is brought into surface contact with the central portion of the lower tray 250.

As described above, when the pressing slope part 420c is in surface contact with the central part of the lower tray 250, ice transfer performance can be improved.

As described above, when the lower assembly 200 is additionally rotated in a state where the pressing portion 420b is in contact with the center of the lower tray 250, the pressing force is continuously applied to the center of the lower tray 250, which is advantageous for ice transfer.

Also, the pressing part 420b may be formed with a concave groove part 424 at an end contacting the lower tray 250.

Therefore, the strength of the lower ejector pin 420 can be increased. Further, when the pressing part 420b presses the convex lower side of the spherical lower tray 250, i.e., the lower chamber 252, to move ice, it can be stably contacted by the groove part 424, and thus it is possible to prevent the ice from being broken due to concentration of force at one place.

If the end of the pressing part 420b is a flat surface, the lower push-out pin 420 comes into point contact with the spherical lower chamber 252, and the contact area decreases, so that the pressing force may not be transmitted normally. Alternatively, there is a concern that the ice may be broken due to concentration of force at one place.

In contrast, in the case of the present invention, the lower ejector pin 420 can be brought into surface contact with the spherical lower chamber 252 by forming the concave groove portion 424 in the pressing portion 420b, and since the contact area is increased, there is an advantage that the pressing force is normally transmitted. Further, there is a problem that ice breakage can be prevented as the force is dispersed.

A reinforcing groove 425 may be formed in the bottom surface of the pin body 420a of the lower ejector pin 420. The groove 425 may extend in a longitudinal direction of the pin body 420 a.

Also, by extending the length of the lower push-out pin 420, when the lower assembly 200 is rotated to perform ice moving, even if the lower assembly 200 cannot reach the ice moving position due to a tolerance of a motor gear included in the driving unit 180, the pressing force can be sufficiently transmitted to the lower chamber 252.

In addition, the lower ejector 400 may be combined with the support wall 120a in various ways.

Referring to fig. 32 and 35, when the lower assembly 200 is rotated to move ice, the support wall 120a may be formed with a protrusion 121a protruding forward toward the side of the lower tray 250 at a side facing the lower tray 250.

A cavity 122a may be formed at a lower end of the protrusion 121a to be recessed rearward. The lower ejector body 410 of the lower ejector 400 may be received in the cavity 122 a. Therefore, the lower ejector main body 410 may be located at a lower portion of the protrusion 121 a.

Also, the protrusion 121a may include guide insertion grooves 123a disposed at both sides of the cavity 122 a.

Guide protrusions 415 slidably inserted into the guide insertion grooves 123a may be formed at both sides of the lower ejector main body 410.

Therefore, the lower ejector main body 410 can be coupled by sliding upward from below the support wall 120 a. At this time, the guide protrusions 415 of both sides of the lower ejector main body 410 are inserted into the guide insertion grooves 123a formed at both sides of the cavity 122 a.

Referring to fig. 32 and 33, the lower ejector main body 410 may be coupled to the top surface 122b of the cavity 122a by using a fastening means 430 such as a bolt, a screw, or the like in a state of being slidably coupled to the support wall 120a as described above.

To this end, the lower ejector main body 410 may include a fastening groove portion 416 recessed from the front to the rear. A fastening hole 416a through which the fastening device 430 penetrates may be formed at the top surface of the fastening groove portion 416.

Also, the fastening groove portion 416 may be formed at the inclined surface 410 a. The fastening groove portion 416 may have a shape in which a width in a front-rear direction thereof is gradually reduced from an upper portion to a lower portion.

Also, a fastening groove portion 416 may be formed between the lower ejector pins 420.

As described above, when the fastening groove portion 416 is formed, the top surface of the fastening groove portion 416 and the top surface 122b of the cavity 122a are fastened from below the fastening groove portion 416 using the fastening device 430 in a state where the top surface of the fastening groove portion 416 is in surface contact with the top surface 122b of the cavity 122a, so that the lower ejector main body 410 can be more easily fixed to the support wall 120 a. Further, the lower ejector 400 can be coupled to the support wall 120a without exposing the fastening portion to the outside.

Referring to fig. 35, a coupling groove portion 122c may be additionally formed at a lower end of the support wall 120a to be recessed upward.

The lower ejector main body 410 may be coupled to the top surface 122d of the coupling groove portion 122c using a fastening device 430 such as a bolt or a screw in a state of being slidably coupled to the support wall 120 a.

For this, the lower ejector body 410 may be formed at a lower end with an extension 417 protruding rearward. A coupling step 418 facing the top surface of the coupling groove portion 122c may be formed at the lower end of the rear surface of the lower ejector body 410 by the extension portion 417. A fastening boss 417b may be formed at the extension portion 417, and the fastening boss 417b may be formed with a fastening hole 417 a.

As described above, when the coupling groove portion 122c and the extension portion 417 are formed, the top surface 122d of the coupling groove portion 122c and the extension portion 417 are fastened from below the extension portion 417 using the fastening device 430 in a state where the top surface 122d of the coupling groove portion 122c is in surface contact with the coupling step 418, so that the lower ejector main body 410 can be more easily fixed to the support wall 120 a. Further, the lower ejector 400 can be coupled to the support wall 120a without exposing the fastening portion to the outside.

As described above, when the lower ejector 400 is provided, even if ice is not separated from the lower tray 250 by its own weight during the rotation of the lower unit 200 for moving ice, the lower ejector 400 presses the lower tray 250, and as a result, ice in the lower chamber 252 can be separated from the lower tray 250.

Specifically, the lower tray 250 contacts the lower ejector pin 420 while the lower unit 200 rotates toward the lower ejector 400.

When the lower assembly 200 is continuously rotated toward the lower ejector 400, the lower ejector pin 420 presses the lower tray 250 to deform the lower tray 250, and the pressing force of the lower ejector pin 420 is transmitted to the ice, so that the ice can be separated from the surface of the lower tray 250. The ice separated from the surface of the lower tray 250 is dropped downward and stored in the ice bin 102.

As described above, when the lower assembly 200 is rotated to perform ice moving, the lower assembly 200 may not reach the ice moving position due to the tolerance of the motor gear included in the driving unit 180. In this case, there is a problem that ice transfer cannot be sufficiently performed. Accordingly, it is possible to perform control of additionally rotating the motor included in the driving unit 180 so that the lower assembly 200 reaches the ice moving position, thereby enabling ice moving to be reliably performed.

Next, an ice making process of the ice maker according to an embodiment of the present invention will be described.

Fig. 39 is a sectional view taken along line B-B of fig. 3 in a water supply state, and fig. 40 is a sectional view taken along line B-B of fig. 3 in an ice making state.

Fig. 41 is a sectional view taken along line B-B of fig. 3 in an ice making completed state, fig. 42 is a sectional view taken along line B-B of fig. 3 in an ice moving initial state, and fig. 43 is a sectional view taken along line B-B of fig. 3 in a state where a lower ejector pin is in contact with a lower tray.

Referring to fig. 39 to 44, first, the lower assembly 200 is rotated to the water supply position.

In the following description, an imaginary line passing through the bottom surface 151a (or the first contact surface) of the upper tray main body 151 is referred to as a first imaginary line L1, and an imaginary line passing through the top surface 251e (or the second contact surface) of the lower tray main body 251 is referred to as a second imaginary line L2.

In the present embodiment, the rotation angle of the lower assembly 200 (or the lower tray 250) is assumed to be the angle formed by the first imaginary line L1 and the second imaginary line L2.

In the water supply position of the lower assembly 200, the top surface 251e of the lower tray 250 is spaced apart from the bottom surface 151e of the upper tray 150. The bottom surface 151e of the upper tray 150 may be referred to as an end surface (end surface).

In the water supply position, the first imaginary line L1 and the second imaginary line L2 may form a first angle θ 1. The first angle may be approximately about 8 degrees, but is not limited thereto.

The bottom surface 151e of the upper tray 150 may be located at the same or similar height as the rotation center C2 of the lower assembly 200, but is not limited thereto.

In the present embodiment, a direction in which the lower assembly 200 is rotated for ice removal (counterclockwise direction with reference to the drawing) is referred to as a forward direction, and a direction opposite thereto (clockwise direction) is referred to as a reverse direction.

In the state as described above, water supplied from the outside is guided by the water supply part 190 and supplied to the ice chamber 111.

At this time, water may be supplied to the ice chamber 111 through one of the plurality of upper openings 154 of the upper tray 150.

In a state where the water supply is completed, a part of the water fills the lower chamber 252, and another part of the water may be stored in a space between the upper tray 150 and the lower tray 250.

Another portion of the water may be stored in the upper chamber 152. Of course, depending on the angle formed by the top surface 251e of the lower tray 250 and the bottom surface 151e of the upper tray 150 or the volumes of the lower chamber 252 and the upper chamber 152, water may not be in the upper chamber 152 after the water supply is completed.

In the case of the present embodiment, the lower tray 250 does not have a passage for communication between the three lower chambers 252.

As described above, even though the lower tray 250 does not have a passage for moving water, since the top surface 251e of the lower tray 250 is spaced apart from the bottom surface 151e of the upper tray 150, water can flow to other lower chambers along the top surface 251e of the lower tray 250 when the water fills a specific lower chamber during the water supply process.

Accordingly, the plurality of lower chambers 252 of the lower tray 250 may be filled with water, respectively.

Also, in the case of the present embodiment, since the lower tray 250 does not have a passage for communicating the lower chamber 252, it is possible to prevent formation of additional ice in a convex shape at the periphery of ice after completion of ice making.

In a state where the water supply is completed, as shown in fig. 40, the lower assembly 200 is rotated in a reverse direction. When the lower assembly 200 is rotated in the reverse direction, the top surface 251e of the lower tray 250 approaches the bottom surface 151e of the upper tray 150.

At this time, the water between the top surface 251e of the lower tray 250 and the bottom surface 151e of the upper tray 150 is distributed to the inside of each of the plurality of upper chambers 152.

When the top surface 251e of the lower tray 250 and the bottom surface 151e of the upper tray 150 are completely attached, the upper chamber 152 is filled with water.

The position of the lower assembly 200 in a state where the top surface 251e of the lower tray 250 is in contact with the bottom surface 151e of the upper tray 150 may be referred to as an ice making position. Alternatively, the ice making position may be referred to as a closed position (closed position).

In the ice making position, the first imaginary line L1 coincides with the second imaginary line L2.

Ice making is started in a state where the lower assembly 200 is moved to the ice making position.

During ice making, the pressing force of water is less than a force for deforming the convex portion 251b of the lower tray 250, and thus, the convex portion 251b is not deformed to maintain an original shape.

When ice making is started, the lower heater 296 is activated. When the lower heater 296 is activated, the heat of the lower heater 296 is transferred to the lower tray 250.

Therefore, if ice making is performed in a state where the lower heater 296 is activated, ice making is started from the upper left side in the ice chamber 111.

That is, water is changed into ice in the ice chamber 111 from the upper opening 154 side. Ice is generated in the ice chamber 111 from an upper side, and thus bubbles in the ice chamber 111 move to a lower side.

The ice chamber 111 is formed in a spherical shape, and thus, a horizontal cross-sectional area is different according to a height of the ice chamber 111.

Accordingly, the output of the lower heater 296 may vary according to the mass per unit height in the ice chamber 111.

The mass per unit height of the water in the ice chamber 111 increases from the upper side toward the lower side, and increases to the maximum at the boundary of the upper tray 150 and the lower tray 250, and then decreases toward the lower side.

The output of the lower heater 296 may be decreased at an initial output and then increased again at a specific output based on the mass per unit height of water of the ice chamber 111.

In the ice chamber 111, the ice is in contact with the top surface of the convex portion 251b of the lower tray 250 in the process that the ice is generated from the upper side toward the lower side.

In this state, if ice is continuously generated, the convex portion 251b is pressed to be deformed as shown in fig. 41, and spherical ice may be generated when ice making is completed.

A control portion, not shown, may determine whether ice making is completed based on the temperature sensed by the temperature sensor 500.

The lower heater 296 may be turned off at the time of or before the completion of ice making.

When the ice making is completed, the upper heater 148 is first activated to move the ice. When the upper heater 148 is activated, heat of the upper heater 148 is transferred to the upper tray 150, so that ice can be separated from the surface (inner surface) of the upper tray 150.

When the upper heater 148 is operated for a set time, the upper heater 148 is turned off, and the lower assembly 200 may be rotated in a forward direction by operating the driving unit 180.

As shown in fig. 44, when the lower assembly 200 is rotated in the forward direction, the lower tray 250 is spaced apart from the upper tray 150.

The rotational force of the lower assembly 200 is transmitted to the upper ejector 300 through the connection unit 350. At this time, the upper ejector 300 is lowered by the unit guides 181 and 182, thereby introducing the upper ejector pin 320 into the upper chamber 152 through the upper opening 154.

During the ice moving process, the ice may be separated from the upper tray 150 before the upper push-out pin 320 presses the ice. That is, the ice may be separated from the surface of the upper tray 150 by the heat of the upper heater 148.

In this case, the ice may rotate together with the lower assembly 200 in a state of being supported by the lower tray 250.

Alternatively, there may be a case where ice is not separated from the surface of the upper tray 150 even though the heat of the upper heater 148 is applied to the upper tray 150.

Accordingly, when the lower assembly 200 is rotated in the forward direction, ice may be separated from the lower tray 250 in a state of being closely attached to the upper tray 150.

In this state, during the rotation of the lower assembly 200, the upper push-out pin 320 passing through the upper opening 154 presses the ice closely attached to the upper tray 150, thereby allowing the ice to be separated from the upper tray 150.

For example, when the angle formed by the first and second imaginary lines becomes a second angle θ 2 greater than the first angle, the upper push-out pin 320 presses the ice closely attached to the upper tray 150, and the ice can be separated from the upper tray 150.

However, the second angle θ 2 in fig. 42 is exemplary, and it is also possible that the ice is separated from the upper tray 150 in the case where the angle is smaller or larger than the second angle.

The ice separated from the upper tray 150 may be supported by the lower tray 250 again.

In a state where the ice is supported by the lower tray 250, when the ice rotates together with the lower assembly 200, the ice may be separated from the lower tray 250 by its own weight even if an external force is not applied to the lower tray 250.

Even if the ice is not separated from the lower tray 250 by its own weight during the rotation of the lower assembly 200, as shown in fig. 44, the ice may be separated from the lower tray 250 when the lower tray 250 is pressed by the lower ejector 400.

Specifically, the lower tray 250 contacts the lower ejector pin 420 during the rotation of the lower assembly 200.

The third angle θ 3 formed by the first and second imaginary lines L1 and L2 may be substantially 90 degrees when the lower ejector pin 420 is in contact with the lower tray 250.

When the lower tray 250 rotates by the third angle θ 3, the third ejector pin 423 of the plurality of lower ejector pins 421, 422, 423 contacts the lower tray 250 first.

At this time, the upper end portion 420d of the pressing portion 420b of the third push-out pin 423 is first brought into contact with the lower tray 250.

When the rotation angle of the lower tray 250 increases, the upper end portion 420d and the lower end portion 420e of the pressing portion 420b of the third push-out pin 423 contact the lower tray 250 together.

In a state where the third push-out pin 423 is in contact with the lower tray 250, when the rotation angle of the lower tray 250 is increased, the first push-out pin 421 and the second push-out pin 422 are in contact with the lower tray 250.

When the lower tray 250 is continuously rotated in the forward direction in a state where the lower push-out pin 420 is in contact with the lower tray 250, the lower push-out pin 420 presses the lower tray 250 to deform the lower tray 250, and the pressing force of the lower push-out pin 420 is transmitted to the ice, so that the ice can be separated from the surface of the lower tray 250.

For example, the ice may be separated from the lower tray 250 from a position adjacent to the second imaginary line L2 in the lower tray 250.

When the lower tray 250 is continuously rotated in the forward direction, the contact area of the ice with the lower tray 250 is reduced, thereby finally enabling the ice to be separated from the lower tray 250.

The lower tray 250 may be rotated to the ice moving position by the driving unit 180. The ice-moving position may also be referred to as an open position (open position).

In the ice moving position, the fourth angle θ 4 between the first imaginary line L1 and the second imaginary line L2 may be greater than 100 degrees, but is not limited thereto. In the present embodiment, the fourth angle may be set to approximately 115 degrees, for example.

In a state where the lower tray 250 is rotated to the ice moving position, the second imaginary line L2 of the lower tray 250 may be substantially parallel to the inclined surface 410a of the lower ejector main body 410.

In a state where the lower tray 250 is rotated to the ice moving position, the amount of deformation of the lower tray 250 is maximized.

For example, in a state where the lower tray 250 is rotated to the ice moving position, the pressing inclined portion 420c of the pressing portion 420b of the lower push-out pin 420 may be maintained in a surface contact state with the lower tray 250.

In a state where the lower tray 250 is rotated to the ice moving position, a distance between the pressing part 420b of the lower ejector pin 420 and the lower ejector main body 410 (e.g., the inclined surface 410a) may be equal to or greater than a distance between the second imaginary line L2 and the inclined surface 410 a.

In another aspect, in a state where the lower tray 250 is rotated to the ice moving position, at least a portion of the lower tray 250 contacting the lower push-out pin 420 may be located on an opposite side of the lower opening 274 with respect to the second imaginary line L2.

In this case, in consideration of the thickness of the lower tray 250, a distance between the portion 252f of the lower tray 250 contacting the lower ejector pin 420 and the lower ejector main body 410 (e.g., the inclined surface 410a) may be greater than a distance between the second imaginary line L2 and the inclined surface 410a in a state where the lower tray 250 is rotated to the ice moving position.

For example, in a state where the lower tray 250 is rotated to the ice moving position, more than 3/4 of the length of the lower push-out pin 420 may be introduced into the lower supporter 270. The length of the portion of the lower ejector pin 420 introduced into the inside of the lower supporter 270 may be equal to or greater than the radius of the ice chamber 111.

As described above, the length of the lower ejector pin 420 may be greater than the radius of the ice chamber 111 to increase the amount of deformation of the lower tray 250 due to the lower ejector pin 420.

According to this structure, ice can be completely separated from the lower tray 250 during ice transfer, so that ice transfer performance can be improved.

After the ice is separated from the lower tray 250, the lower assembly 200 is again reversely rotated downward by the driving unit 180.

When the lower ejector pins 420 are spaced apart from the lower tray 250 during the reverse rotation of the lower assembly 200, the deformed lower tray may be restored to an original shape.

During the reverse rotation of the lower assembly 200, the rotational force is transmitted to the upper ejector 300 through the connection unit 350, so that the upper ejector 300 is lifted and the upper ejector pin 320 is disengaged from the upper chamber 152.

When the lower assembly 200 reaches the water supply waiting position, the driving unit 180 is stopped, and the water supply is started again.

Claims

1. An ice making machine, comprising:

an upper tray assembly including an upper mold portion having at least one upper cavity;

a lower tray assembly including a lower support and a lower mold section having at least one lower cavity and having flexibility, the lower mold section being detachably supported by the lower support; and

a lower part pusher which is used for pushing out the materials,

the lower tray assembly is movable between an open position and a closed position relative to the upper tray assembly,

in the closed position, the upper and lower chambers form at least one ice chamber for making ice,

in the open position, the lower ejector extends through a lower opening of the lower support such that the lower mold section is partially separated from the lower support to de-ice the lower cavity.

2. The ice-making machine of claim 1,

the lower opening is formed at a position corresponding to the center of the outer surface of the lower chamber.

3. The ice maker of claim 1 or 2,

a contact point in the lower mold portion with the lower ejector corresponds to a center line of the lower mold portion or a symmetrical center line of the lower cavity.

4. The ice-making machine of claim 1,

5. The ice maker of claim 4,

the lower ejector is formed in a circular arc shape in which the center of the lower ejector corresponds to the center of the rotary shaft.

6. The ice-making machine of claim 1,

the end face of the lower ejector is parallel to a tangent line of the outer peripheral surface of the lower mold portion at a point where the lower ejector initially contacts the lower mold portion.

7. The ice-making machine of claim 1,

the lower mold portion is formed of a flexible material or a silicon material.

8. The ice-making machine of claim 1,

the lower support member covers 1/2 or more of the outer peripheral surface of the lower mold portion.

9. The ice-making machine of claim 1,

one part of the lower mold part is fixed to the lower support, and the other part is detachably supported by the lower support.

10. The ice-making machine of claim 1,

further comprising a lower heater received in a heater receiving groove formed in the lower support adjacent the lower opening, the lower heater contacting the lower mold portion at least in a closed position.

11. The ice-making machine of claim 1,

further comprising an upper ejector for separating ice from the upper chamber,

the upper mold portion includes an upper opening for passing the upper ejector therethrough.

12. The ice-making machine of claim 1,

the upper chamber and the lower chamber are formed in a hemispherical shape to form a spherical ice chamber.