KR101996269B1 - An apparatus for making ice comprising empty space inside and a method for manufacturing the same ice - Google Patents

Abstract

An ice making frame including a cavity therein, and an ice making apparatus and an ice making method including the ice making frame are disclosed. An ice making frame including a cavity therein includes a tray portion provided with an accommodation space for accommodating water therein and formed with an inlet for communicating the accommodation space with the outside; And a cavity-forming material receiver made of an elastic material capable of accommodating a cavity-forming material therein and having an insert portion insertable into a receiving space of the tray portion through an injection port and an exposed portion disposed outside the tray portion, The cavity forming material is injected into the interior of the inserted cavity-forming material receiver, water is supplied into the space and cooled, and ice is produced in the space excluding the cavity-forming material receiving space of the tray portion.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an ice making apparatus and an ice making method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice making apparatus and an ice making method including an internal cavity.

Generally, a ice shelf used in a home, a restaurant, a beverage shop such as a coffee or a juice is made of plastic or silicone material having a shape having a plurality of compartments corresponding to the shape of each ice, Is formed in a uniform shape filled with an inner space without an empty space. FIG. 1 shows a ice frame according to the related art, and in the case of producing ice using the ice frame of FIG. 1, a cubic ice having no empty space is produced.

Korean Patent Publication No. 2004-0001576 relates to a container for making ice for use in a home by putting it in a freezing room such as a refrigerator. Especially, by using silicon as a material of a container, the flexibility is maximized, And to facilitate the discharge of frozen ice.

However, in recent years, there has been an increase in consumer expectations and demands related to design diversity of a specific product. Consumers tend to prefer a different and unique product when selecting a product, The same is true for.

According to the above-described prior art, ice is produced using a silicon ice container, thereby preventing the release of environmental hormones and facilitating the discharge of frozen ice. It is not possible to form ice having an empty space therein, It can not meet the needs of changing consumers.

Therefore, at present, there is a need for an apparatus and a method for manufacturing a ice tray and an ice, which can manufacture ice having an empty space in the inside thereof.

Korea Patent Publication No. 2004-0001576

The present invention is realized by recognizing at least any one of the requirements or problems occurring in the conventional ice making apparatus and the ice making method.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide an ice maker capable of producing ice having an empty space therein, an ice maker including such ice maker,

In addition, ice having a cavity therein is manufactured, and various drinks or other resources are put into the empty space inside the ice making room.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an ice making mold including an inner cavity according to an embodiment of the present invention. The ice making mold includes an accommodation space for containing water therein. ; And a cavity-forming material receiver made of an elastic material, the cavity-forming material receptacle being capable of receiving a cavity-forming material therein and having an insertion portion insertable into the receiving space of the tray portion through the injection port and an exposed portion disposed outside the tray portion, Wherein the cavity-forming substance is injected into the cavity-forming substance receiver into which the insertion portion is inserted into the cavity, and water is supplied and cooled in the cavity, so that the space excluding the cavity- In which ice is produced.

According to an embodiment of the present invention, the ice making frame may further include a handle portion formed on an upper portion of the tray portion so as to protrude toward the outside of the tray portion, wherein the injection port of the tray portion is formed to pass through the handle portion, It is preferable that an upper fixing body is provided on the upper part of the injection port and a lower fixing body is provided on the lower part of the injection port to fix the cavity forming material receiver inserted in the receiving space.

According to an embodiment of the present invention, the lower surface of the tray may further include a discharge port for discharging impurities discharged during the ice making process to the outside.

Further, according to an embodiment, it is preferable that the liquid or the particle size of which has a smaller freezing point than that of water is smaller than the size of the injection port.

Also, according to one embodiment, the cavity-forming material receiver is preferably made of a silicon material.

According to another aspect of the present invention, there is provided an ice making apparatus including an internal cavity, comprising: the above-described ice making frame; A cylindrical inner water tank having a space for receiving the ice making frame therein and having an opened upper surface for storing water provided in the ice making frame; An outer case having a space for accommodating the inner water container therein and formed to surround the inner water container from the outside; And a cylindrical heat insulating material provided between the inner water container and the outer case.

According to another aspect of the present invention, there is provided a method of manufacturing ice including an inner cavity, comprising the steps of: preparing a receiving space in which water is contained, and a tray portion having an inlet for communicating the receiving space with the outside, ; Inserting into the receiving space of the tray portion a cavity-forming material receiver of an elastic material capable of receiving a cavity forming material therein; Injecting the cavity-forming material into the interior of the cavity-forming material receiver; Supplying water to a space between the tray portion and the cavity-forming material receiver; An ice making step of cooling the tray part to generate ice; And removing the cavity-forming material from the cavity-forming material receiver and removing the cavity-forming material receiver.

According to the present invention as described above, it is possible to easily manufacture ice having a cavity therein. In addition, it is possible to manufacture an ice having a cavity with a very high transparency, not a conventional opaque ice.

In addition, it is possible to manufacture ice having a cavity therein, and to use various drinks or other resources in the empty space in the interior.

This allows us to meet the needs of a variety of changing consumers, and to describe sales improvements from the seller's perspective.

1 is a block diagram of a general ice frame.
2 is a cross-sectional view of an ice making frame having an internal cavity according to an embodiment of the present invention.
3 is a view showing an embodiment of a receiving space of an ice making frame according to the present invention.
4 is a cross-sectional view of an ice making mold according to another embodiment of the present invention.
5 is a cross-sectional view of an ice making mold according to another embodiment of the present invention.
6 is a perspective view of an ice making mold according to another embodiment of the present invention,
7 is an exploded perspective view of an ice making apparatus according to an embodiment of the present invention.
8 is a configuration diagram of an ice making apparatus according to another embodiment of the present invention.
9 is a flowchart of a method of manufacturing ice according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

Also, throughout this specification, when a component is referred to as "comprising ", it means that it can include other components as well, without departing from the other components unless specifically stated otherwise.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential and essential characteristics thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Wherein like reference numerals refer to like elements throughout.

FIG. 2 is a cross-sectional view of an ice making frame having an internal cavity according to an embodiment of the present invention, FIG. 3 is an embodiment of a receiving space of the ice making frame according to the present invention, FIG. 5 is a cross-sectional view of an ice making mold according to another embodiment of the present invention, FIG. 6 is a perspective view of an ice making mold according to another embodiment of the present invention, and FIG. 7 is an exploded perspective view of an ice making apparatus according to an embodiment of the present invention, FIG. 8 is a structural view of an ice making apparatus according to another embodiment of the present invention, FIG. 9 is a cross- It is a flowchart of the method.

2 through 9, an ice making frame including an inner cavity according to the present invention, an ice making device including the ice making frame, and an ice making method including an inner cavity will be described in detail.

1. Full Configuration

Referring to FIG. 2, an ice making mold 100 including an empty space according to an embodiment of the present invention includes a tray 110 corresponding to a body, Forming material receptors 118. [0034] A receiving space 113 is provided in the tray 110 and an inlet 111 communicating with the receiving space 113 is provided in the upper portion of the receiving space 113. The liquid to be frozen (for example, water) is injected into the receiving space 113 of the tray unit 110 through the injection port 111, or when the ice making mold 100 is placed in the external water tank, Water can also be injected through outlet 112.

The ice making frame 100 of this embodiment can be used as a part of a transparent ice device including an inner water container, an outer case and a heat insulating material, rather than being used in a single configuration. The inner water tank has a space for accommodating the ice making frame therein, and an upper surface for storing water provided in the ice making frame is opened. The outer case has a space for accommodating the inner water bottle therein and is formed to surround the inner water bottle from the outside. A heat insulating material is provided between the inner water container and the outer case.

Particularly, the ice in the upper part can form a large transparent ice having a diameter of 5 cm or more by accommodating bubbles or impurities that escape from the inside of the tray portion during the freezing of the ice from the inside of the ice tray, It can be used for various purposes such as cocktail.

In this embodiment, the receiving space 113 is diamond-shaped, but this is merely an example for explanation, and the present invention is not limited thereto. Therefore, the shape of the accommodation space 113 can be variously adopted depending on the shape of the ice to be manufactured, which will be described later with reference to FIG. A liquid (for example, water or the like) to be frozen is received in the receiving space 113 of the tray unit 110. Although the present invention has been described in connection with the case where one receiving space 113 is formed in the tray unit 110, the present invention is not limited thereto. A plurality of receiving spaces 113 may be formed in the tray unit 110, It is also possible to form it.

2. Coupling material receptors

The cavity-forming material receiver 118 is made of an elastic material, wholly or partly of an elastic material, and can be discharged from the ice through a hole formed in the upper part when the ice is completed. The cavity-forming material receiver 118 is preferably made of a silicon material. The cavity-forming material receiver 118 is made of an elastic material, and may vary in volume and / or shape depending on the type and amount of the cavity-forming material injected therein. The cavity forming material receptacle 118 may include an insertion portion 118b which is a portion inserted into the receiving space 113 of the tray portion 110 and an exposure portion 118b which is not inserted into the receiving space 113 but is disposed outside the tray portion 110 118a. ≪ / RTI >

2-1. Co-forming material

At this time, the cavity-forming material that can be accommodated in the cavity-forming material receiver 118 should be a liquid having a lower freezing point than that of water (e.g., brine, alcohol, etc.). This is because water can be released from the common space inside the ice to the outside only if it exists in a liquid state even after the ice is frozen and formed.

After the cavity-forming material exits from the cavity in the ice, the insertion portion of the cavity-forming substance receiver also escapes through the upper hole of the ice. This results in the formation of transparent large ice with a complete cavity with small holes in the top.

In addition, other methods can insert solid (e.g., sand, salt, sugar, etc.) of small particles into the interior. In the case of being formed into a particulate solid, it is possible to maintain the internal fluidity irrespective of the freezing point. In particular, when moisture is present in the interior, the solids may partially aggregate depending on the temperature. do.

As described above, some or all of the cavity-forming material receiver 118 is made of an elastic material, so that after the ice is formed, a cavity is formed from the insertion portion 118b of the cavity-forming material receiver 118 to the exposed portion 118a Material can be discharged outside of the cavity-forming material receiver 118. [

The volume of the insertion portion 118b of the cavity-forming material receiver 118 must be smaller than the volume of the accommodation space 113 of the tray portion 110 and the space excluding the insertion portion 118b in the accommodation space 113 must be smaller than the volume of the ice- And becomes an ice making area to be generated.

2-2. Components for transparent ice

In addition, the ice making frame 100 according to an embodiment of the present invention may further include a handle 114 formed on an upper portion of the tray 110. The handle 114 is formed on the upper surface of the tray 110 and is formed to protrude a predetermined length toward the outside of the tray 110. The grip portion 114 is a structure for easily detaching the ice making frame 100 according to the present invention from the inner water container or separating the pair of tray portions 110 that are symmetrical in the left and right direction, And may further include a depression 115 that is recessed at a predetermined depth in the central portion. According to the present embodiment, when the ice making mold 100 further includes the handle 114, it is preferable that the injection port 111 is formed to penetrate through the handle 114.

The ice making mold 100 may further include a discharge port 112 provided below the storage space 113 and communicating with the storage space 113 from the outside. The discharge port 112 is formed on the lower surface of the tray unit 110 to discharge impurities generated in the receiving space 113 to the outside during the freezing. Specifically, in the process of forming ice, when water slowly starts to freeze from the upper part, bubbles or other impurities in the water push downward, pure water is converted into ice, and clear, transparent ice with high density . That is, as the ice is formed, the impurities contained in the water are pushed downward. Finally, the impurities are discharged through the discharge port 112 located at the bottom.

The ice making mold 100 according to the present invention is configured such that a pair of tray portions 110 symmetrical with respect to the cut surface are coupled so as to share a cut surface. The cut surfaces of the tray units 110 may have engaging portions 116 engageable with each other in order to mutually engage the pair of tray units 110.

In addition, according to another embodiment of the present invention, the ice making mold 100 may further include an upper stepped portion 117. The upper stepped portion 117 may have a predetermined thickness on the upper portion of the tray portion 110 and may protrude horizontally toward the outside of the tray portion 110. The upper stepped portion 117 is a structure for placing the ice making mold 100 on the inner water tank to be described later.

3, various examples relating to the shape of the receiving space 113 of the ice making frame 100 according to the present invention are shown. 3 (a) is a cube shape, and Fig. 3 (b) is an example of a sphere shape. However, the shape of the accommodation space 113 may be variously adopted depending on the shape of the ice to be manufactured (for example, a shape combining two umbrella structures, etc.).

2-3. Components for fixing

Another embodiment of the present invention will be described with reference to Fig. Referring to the drawings, the cavity-forming material receiver 118 may further include an upper fixing body 119a and a lower fixing body 119b. The upper fixing body 119a is provided on the upper portion of the injection port 111 and the lower fixing body 119b is provided on the lower portion of the injection port 111 to fix the cavity- .

The upper fixing body 119a may be formed in a shape larger than the diameter of the injection port 110 so that the portion after the upper fixing body 119a can not be inserted at all, Is formed on the upper portion of the insertion portion 118b of the receiver 118 to fix the lift by the buoyancy in the lower portion of the injection port.

Particularly, the upper part of the insertion part 118b can be more firmly fixed using the effect of flattening the surface area of the insertion part 118b as the insertion part 118b expands, And can easily escape through the injection port 111 after the internal material has escaped.

In this structure, the lower fixture 118b may be formed as a plurality of wings having a triangular cross section, and the cross section of the triangle should be designed to be smaller than the diameter of the inner injection port 111. [

2-4. Removal structure of unnecessary part

Another embodiment of the present invention will be described with reference to FIG. Referring to FIG. 1, the ice making mold 100 may further include an inner step 120 at the lower end of the injection port 111 and the upper end of the discharge port 112. It is necessary to break the ice formed in addition to the injection port 111 and / or the discharge port 112 to make the ice into the correct shape of the accommodation space 113 after the ice is formed. This makes it easy to break unnecessary ice. As shown in the figure, the inner step 120 is formed to protrude in a blade shape toward a vertical central axis of the ice making mold 100.

2-5. Insert structure

The exposed portion of the cavity-forming material receiver may further include a quantitative adjusting portion capable of adjusting the amount of the cavity-forming material injected into the insertion portion. In general, a structure similar to a cylinder-shaped syringe capable of quantitative measurement can be adopted, but is not limited thereto.

In the formation of the cavities, there is a need to form cavities of various sizes as required, and accordingly, there is a need to adjust the amount of the cavitation-forming material to be injected. At this time, the quantitative control unit can control the size of the cavity by adjusting the amount of the cavity-forming material that can be contained therein, for example, 80 cc, 100 cc, 120 cc or the like.

In addition, the cavity-forming material injected into the insertion part may increase the volume of the ice itself due to freezing of the ice, and thus, there is a possibility of backflow to the exposed part by the generated pressure. . The general backflow prevention part may be provided with a valve, a stopcock, or the like for blocking the flow of the backflow through the path of the metering control part.

Also, within the insertion portion of the cavity-forming substance receiver, a plurality of internal wires are disposed in the longitudinal direction between the exposed portion and the insertion portion. The inner wires are arranged in the longitudinal direction to support the spherical shape at the time of use and extend in the longitudinal direction at the time of discharge after use so that they can easily escape.

In addition, such an inner wire adopts a double-layer structure, such as a silicon film-an inner wire-silicon film, so that it can bring about an effect of preventing corrosion due to materials used therein.

In this structure, it is preferable to further include a wire control section for controlling the expansion and contraction of the inner wire to control the expansion of the space formed by the inner wire.

2-6. Plural ice structure

6, an ice making mold 100 according to another embodiment of the present invention is shown. As described above, a plurality of accommodation spaces 113 can be formed in the tray unit 110 of the ice making frame 100. Although five receiving spaces 113 are formed in the tray 110 in the present embodiment, the present invention is not limited thereto. The grip portions 114 may be formed to correspond to one accommodation space 113 in a one-to-one correspondence or correspond to a plurality of accommodation spaces 113 in a multi-to-one correspondence, In the case of a plurality of accommodating spaces as well, it is preferable that they are formed so as to correspond to multiples: 1. 6 (a) shows a state in which the pair of ice making molds 100 in a symmetrical shape are not coupled, and FIG. 6 (b) shows a combined state.

3. Ice making equipment

An exploded view of the ice making apparatus 10 according to another embodiment of the present invention is shown in Fig. Referring to the drawings, an ice making apparatus 10 according to the present invention includes an ice making mold 100, an inner water bottle 200, and an outer case 300. Since the ice making mold 100 has been described above, a detailed description thereof will be omitted. The inner water bottle 200 is for storing water provided in the ice making mold 100 and has a space for accommodating the ice making mold 100 therein. The inner water bottle 200 has an upper surface opened to allow the ice making mold 100 to be inserted and removed, and preferably has a shape corresponding to the shape of the ice making mold 100. For example, if the shape of the ice making mold 100 is the same as the example shown in FIG. 6, the inner water can 200 may have a hexahedral shape extending in the longitudinal direction. In addition, as shown in FIG. 7, when the ice making mold 100 has a cylindrical shape, the inner water container 200 will also have a cylindrical shape.

In addition, the material of the inner water bottle 200 may be a plastic, and preferably a polycarbonate (PC), but is not limited thereto. The outer case 300 has a space for accommodating the inner water bottle 200 therein and the shape of the outer case 300 corresponds to the shape of the inner water bottle 200. The material of the outer case 300 may be plastic, and is preferably polycarbonate (PC) or ABS (acryltryl-butadiene-styrene), but is not limited thereto. The thickness of the outer case 300 is preferably about 1.5 mm to 3.0 mm, but is not limited thereto. The outer case 300 may include a bottom portion 310 and the bottom portion 310 may be formed of a silicone material to prevent slipping.

8, the ice making apparatus 10 may further include a heat insulating material 250 provided between the inner water can 200 and the outer case 300. The heat insulating material 250 is preferably a cylindrical shape, and is preferably expanded polypropylene (EPP) or expanded polystyrene (EPS), but is not limited thereto. The heat insulating material 250 surrounds the side and the bottom of the inner water can 200 to maintain the heat insulation. Thus, directional freezing in which the ice gradually becomes frozen from the top to the bottom in the ice making mold 100 proceeds. Accordingly, the impurities in the water descend downward as the ice making progresses, and are discharged to the outside through the discharge port 112 to produce transparent ice. Meanwhile, the thickness of the heat insulating material 250 may be different depending on the height. For example, when the upper thickness of the heat insulating material 250 is thinner than the lower thickness, the cooling rate can be improved while maintaining the directional ice making.

4. How to make ice

Referring to Fig. 9, a method of manufacturing ice including an internal cavity according to another embodiment of the present invention will be described. First, an ice making frame including a tray portion having a receiving space therein is prepared (S100). The upper portion of the tray portion is provided with an inlet for communicating the inside accommodation space with the outside. When the ice making frame is prepared, an elastic material cavity-forming material receiver capable of accommodating the cavity-forming material is inserted into the receiving space of the tray portion (S110). At this time, instead of inserting the entire cavity-forming material receiver into the receiving space, only a part is inserted into the receiving space, and the other part is left outside the tray part. Since the tray unit has a structure in which the right and left sides are coupled, it is only necessary to insert the cavity-forming material receiver at a desired position of the tray unit and then connect the other tray unit.

For convenience of explanation, the portion of the cavity-forming material receiver which is inserted into the accommodation space is referred to as an insertion portion, and the portion remaining outside is referred to as an exposed portion. After the cavity-forming substance receiver is inserted into the receiving space, the cavity-forming substance can be injected into the cavity-forming substance receiver.

In some cases, a cavity-forming substance is already injected into the interior of the cavity-forming substance receiver, and the space between the insertion portion and the exposure portion can be made relatively movable. Here, the cavity-forming material is preferably a liquid (e.g., brine, alcohol, etc.) or solid (e.g., sand, salt, sugar, etc.) having a lower freezing point than water.

When the cavity-forming substance receiver is inserted into the cavity after the cavity-forming substance is injected into the cavity-forming substance receiver, it is preferable that the basic shape of the cavity-forming substance receptor is in the shape of a bevy (8).

Next, water is supplied to the space between the tray portion and the cavity-forming material receiver through the injection port (S120). After the water is supplied, the tray is cooled to produce ice (S130). When the deicing step S130 is completed, the cavity forming material is removed from the cavity forming material receiver and the cavity forming material receiving material is removed (S140).

The step of removing the cavity-forming material receiver moves the cavity-forming material from the insert to the exposed portion, and then discharges the slightly shrunk insert through the conventional injection port. Through this process, an inner cavity can be formed and an inner space can be formed as an empty space. As described above, since the cavity-forming substance is liquid or solid, the cavity-forming substance can be removed in a manner such as placing the tray portion upside down.

According to the present invention as described above, it is possible to easily manufacture ice having a cavity therein, and various drinks or other resources can be put into the empty space in the ice for various applications.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Ice making apparatus 100: Ice making frame
110: tray part 111: inlet
112: outlet 113: accommodation space
114: handle 115: depression
116: engaging portion 117: upper step
118: cavity forming material receptor 119:
120: inner step 200: inner bucket
250: Insulation material 300: Outer case

Claims (8)

1. An ice making mold comprising a cavity therein,
A tray portion having a receiving space for containing water therein and formed with an injection port communicating the receiving space with the outside; And
And a cavity-forming material receptacle capable of accommodating a cavity-forming material therein and including an insertion portion of an elastic material insertable into the receiving space of the tray portion through the injection port and an exposed portion disposed outside the tray portion,
Wherein said cavity-forming substance is injected into said cavity-forming substance receiver into which said insertion portion is inserted, and water is supplied and cooled in said cavity, so that the cavity- Ice is produced in space,
Further comprising: a plurality of internal wires disposed in the insertion portion of the cavity-forming material receptacle in a longitudinal direction between the exposed portion and the inserting portion, and a wire control portion for regulating expansion of the internal wire,
After the ice is produced, the wire control controls expansion and contraction of the inner wire such that the cavity-forming material is moved to the exposed portion within the cavity-forming material receiver, and the insertion portion is ejected through the injection port Wherein the ice making frame is made of glass.
The method according to claim 1,
The ice making frame may further include a grip portion protruding toward an outer side of the tray portion on an upper portion of the tray portion,
The injection port of the tray portion is formed to penetrate the handle portion,
And an outlet for discharging impurities discharged at the time of making the ice to the outside.
The method according to claim 1,
Wherein the cavity-forming material receiver comprises: an upper fixture fixed at an upper portion of the injection port; And
Further comprising a lower fixture formed on an upper portion of the insertion portion and fixing the upward movement by buoyancy at a lower portion of the injection port,
Wherein the cavity-forming substance receiver is fixed in the cavity when it is cooled.
The method according to claim 1,
Wherein the cavity-forming material comprises a liquid having a lower freezing point than water.
The method according to claim 1,
Wherein the exposed portion of the cavity-forming substance receiver is capable of injecting a predetermined amount of the cavity-forming substance into the insertion portion; And
Further comprising a backflow preventing portion for preventing the backflow of the cavity-forming material from the insertion portion to the exposed portion during cooling.
delete An ice maker according to any one of claims 1 to 5,
An inner water bottle having an upper surface opened to store water provided in the ice making frame, the space having a space for accommodating the ice making frame therein;
An outer case having a space for accommodating the inner water container therein and formed to surround the inner water container from the outside; And
And a heat insulating material provided between the inner water bottle and the outer case.
1. A method of manufacturing an ice comprising a cavity inside,
Preparing a tray portion having an accommodation space for containing water therein and formed with an injection port communicating the accommodation space with the outside;
Inserting an insertion portion of an elastic material cavity-forming material receiver containing a cavity-forming material into the receiving space of the tray portion;
Supplying water to a space between the tray portion and the cavity-forming material receiver;
An ice making step of cooling the tray part to generate ice;
Discharging the cavity-forming material in the insert to the outside of the tray; And
And discharging an insert of the cavity-forming substance receiver within the tray portion,
The cavity forming material receptacle further includes an exposed portion disposed on the outside of the tray portion in addition to the insertion portion inserted into the receiving space of the tray portion, And a wire control section for controlling the expansion of the inner wire,
Wherein the step of discharging the cavity-forming material in the insertion portion to the outside of the tray portion is performed by controlling the expansion and contraction of the internal wire by the wire control portion.

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