KR101959556B1 - Refrigerator - Google Patents

Abstract

Embodiments provide a refrigerator in which ice making is performed by a direct cooling method using a refrigerant in a ice making chamber in a door.
The refrigerator includes a refrigerator main body that forms an outer appearance of the refrigerator and is divided into a freezer compartment and a refrigerating compartment by a barrier, a door installed at both side edges of the front surface of the refrigerator body to open and close an internal space of the refrigerator body, An ice making pipe provided in the door so as to perform heat exchange with the refrigerant, and a coolant generating unit that generates ice through heat exchange between the coolant and the coolant, A control valve for blocking the flow of the refrigerant before the door is replaced when the door needs to be replaced, and a control valve for shutting off the flow of the refrigerant before the door is replaced, And a pipe case containing a foaming agent for insulation, and the soft pipe includes an outer rubber , The reinforcing layer, may be provided in the form of a pleated flexible coolant hose is made of a four-layer structure of the inner rubber layer and the resin layer.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator.

A refrigerator is a device intended for low-temperature storage of food, and can be configured to refrigerate or store food according to the type of food to be stored.

The interior of the refrigerator is cooled by the continuously supplied cold air, and the cold air is continuously generated by the heat exchange action of the refrigerant by the refrigeration cycle through compression-condensation-expansion-evaporation process. The cold air supplied to the inside of the refrigerator is uniformly transferred to the inside of the refrigerator by the convection so that the food inside the refrigerator can be stored at a desired temperature.

The refrigerator body may have a rectangular parallelepiped shape with the front surface thereof opened, and a refrigerator compartment and a freezer compartment may be provided inside the refrigerator body. In addition, a refrigerating chamber door and a freezing chamber door for selectively shielding the opening portion may be provided on the front surface of the refrigerator body. In the storage space inside the refrigerator, a plurality of drawers, a shelf, and a storage box And the like.

In general, a top-mount type refrigerator in which a freezing compartment is located on the upper side and a refrigerating compartment is located on the lower side is the mainstream. In recent years, however, a bottom freeze type Refrigerators are also on the market. In the case of the bottom freeze type refrigerator, the frequently used refrigerator room is located on the upper side and the relatively less used freezer room is located on the lower side, so that the user can conveniently use the refrigerator room. However, since the bottom freeze type refrigerator has the freezing chamber located on the lower side, it is inconvenient for the user to bend the waist to open the freezing chamber door and take out the ice to take out the ice.

In order to solve such a problem, a refrigerator is provided in which a dispenser for taking out ice is provided in a refrigerator door positioned above a bottom freeze type refrigerator. In this case, an ice maker for generating ice may be provided in the refrigerator compartment door or the refrigerating compartment.

In the case of the bottom freeze type refrigerator in which the ice maker is installed in the refrigerator compartment door, the air (cool air) cooled by the evaporator is branched out into the freezer compartment and the refrigerating compartment. The cool air discharged to the freezer compartment flows to the ice maker along the cool air supply duct embedded in the side wall of the refrigerator body of the refrigerator and then dehydrates while flowing inside the ice maker. Thereafter, the cold air in the ice maker is discharged to the cold storage room through the cold reduction duct embedded in the side wall of the refrigerator body of the refrigerator, thereby lowering the internal temperature of the refrigerator.

However, in the case of the conventional refrigerator, since the structure for insulation of the cold supply duct / cold reduction duct and the duct is added to the left or right wall portion of the refrigerator, the volume of the refrigerator can be reduced, have.

In addition, since the ice making in the refrigerator door is indirectly cooled by the cold air of the cold supply duct, the ice in the refrigerator door can not be directly cooled by the refrigerant, so that the ice making speed can be slow.

Patent Document: Korean Patent No. 10-0565621 (registered on March 22, 2006)

Embodiments of the present invention provide a refrigerator in which ice making is performed by a direct cooling method using a refrigerant in a ice making chamber in a door.

According to an aspect of the present invention, there is provided a refrigerator comprising: a refrigerator body forming an appearance of a refrigerator and being divided into a freezing chamber and a refrigerating chamber by a barrier; A door installed at both side edges of the front surface of the refrigerator body to open and close the internal space of the refrigerator body; An evaporator, a compressor for phase-changing the refrigerant discharged from the evaporator to a gaseous refrigerant at high temperature and pressure, a condenser for phase-changing the gaseous refrigerant to liquid refrigerant at a high pressure, and an expansion valve for providing the evaporator with the liquid- A cool air generating unit for circulating a coolant for supplying cool air to the inner space; A refrigerant pipe installed in the refrigerator body to receive the refrigerant of the cold-generating unit; An ice making pipe provided in the door to perform heat exchange with the refrigerant; An ice tray provided on the door to provide an ice-making space; an ice-making tray for providing a frame to be in contact with the ice-making pipe to generate ice through heat exchange with the refrigerant; An ice bucket, and the ice-making unit includes a heater provided on a periphery of the ice-making tray; A flexible pipe extending from the folded portion of the refrigerator body and the door to extend between the ice making pipe and the refrigerant pipe in the opening and closing directions of the door; A control valve that interrupts the flow of the refrigerant before the door is replaced when the door needs to be replaced; And a pipe case enclosing the end portion of the refrigerant pipe and having a foaming agent for heat insulation. The ice making pipe includes a contact portion extending from one end of the ice-making tray to the other end and extending toward one end of the ice- , The contact portion is attached to the bottom surface of the ice-making tray by an adhesive or a fastening member to cool water through direct heat exchange with water contained in the ice-making tray, and is curved a plurality of times to form a plurality And the flexible pipe may be provided as a flexible wrinkle-shaped refrigerant hose made of a four-layer structure of an outer rubber layer, a reinforcing layer, an inner rubber layer, and a resin layer.

At this time, a part of the refrigerant is circulated to the freezing cycle of the freezing chamber and the freezing chamber along the refrigerant line, and another part of the refrigerant is branched to the freezing chamber through the refrigerant pipe to cool the freezing chamber And then circulated to a refrigeration cycle composed of the compressor, the condenser, and the expansion valve.

When the ice is dropped by the rotary motor to the ice bucket disposed below the ice-making tray, the heater heats the surface of the ice-making tray for a predetermined time to melt the ice surface attached to the surface of the ice- The ice tray separates from the ice-making tray, and the ice is dropped by the ice-making tray into the ice bucket by the twisting, so that the ice inserted between the auger's wings is discharged to the outside through the dispenser provided in the door Can be discharged.

Embodiments of the present invention can provide ice making in the refrigerator door directly through the refrigerant by providing the refrigerant of the refrigerator body side refrigerant pipe to the ice maker pipe side of the refrigerator door so that the cooling efficiency of the ice can be improved, The energy efficiency consumed by the ice maker can be increased, and the ice-making speed can be increased.

1 is a perspective view illustrating a refrigerator according to a first embodiment of the present invention.
FIG. 2 is a state diagram showing the connection state between the ice making pipe, the refrigerant pipe, and the soft pipe in the refrigerator according to the first embodiment of the present invention.
3 is a state diagram illustrating a connection state between an ice making pipe, a refrigerant pipe, and a soft pipe in a refrigerator according to a modified example of the first embodiment of the present invention.
4 is a side cross-sectional view showing the internal configuration of the ice-making part of Fig.
FIG. 5 is a plan view showing an internal configuration of the ice-making portion of FIG. 1;
6 is a block diagram illustrating a cool air generating unit of a refrigerator according to a first embodiment of the present invention.
7 is a block diagram showing a cool air generating unit of a refrigerator according to a modification of the first embodiment of the present invention.
8 is a perspective view illustrating a refrigerator according to a second embodiment of the present invention.
FIG. 9 is a state diagram showing the connection state between the ice making pipe, the refrigerant pipe, and the soft pipe in the refrigerator according to the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish 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, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 1 is a perspective view illustrating a refrigerator according to a first embodiment of the present invention, FIG. 2 is a state diagram showing a connection state between an ice making pipe, a refrigerant pipe, and a soft pipe in a refrigerator according to a first embodiment of the present invention FIG. 3 is a state view showing a connection state between an ice making pipe, a refrigerant pipe and a soft pipe in a refrigerator according to a modified example of the first embodiment of the present invention, and FIG. 4 is a view showing an inner structure of the ice- And Fig. 5 is a plan view showing an internal configuration of the ice-making portion of Fig.

1 to 5, a refrigerator according to a first embodiment of the present invention includes a refrigerator body 10 forming an outer appearance, a door 20 for opening and closing an inner space of the refrigerator body 10, A refrigerant generating portion 40 for circulating the refrigerant and a flexible pipe 130 for expanding the refrigerant in the freezing portion 40 to the freezing portion 30 through the flexible pipe 130. The freezing portion 30 is provided in the door 20, (100) for regulating the flow of the refrigerant through the control valve.

Specifically, the refrigerator body 10 may be partitioned into a freezing chamber F and a refrigerating chamber R by a barrier 12 as a housing constituting the outer shape of the refrigerator. For example, a freezing chamber F may be provided below the refrigerator body 10, and a refrigerating chamber R may be provided above the refrigerator body 10. The freezing chamber (F) and the refrigerating chamber (R) can be opened and closed by a door (20).

The door 20 may include a refrigerator compartment door that selectively shields the refrigerating compartment R from both sides of the front surface of the refrigerator body 10 and a freezer compartment door that shields the front opening of the freezer compartment F. [

In this embodiment, the refrigerator compartment door provided with the ice-making compartment 30 is provided to open and close the refrigerating compartment R, but the ice-making compartment 30 is provided in the freezing compartment door provided for selectively shielding the freezing compartment F It is not excluded. In addition, although the refrigerator according to the present embodiment is a bottom freeze type refrigerator in which a freezing room F is located at a lower position, it is not limited thereto and the present invention can be applied to various types of refrigerators .

The ice making section 30 includes an ice making chamber 32 for providing an ice making space for generating ice, an ice making tray 33 for generating ice through heat exchange between the coolant and the ice making tray 33, A rotary motor 36 which rotates the ice-making tray 33 to drop the ice produced in the ice-making tray 33 into the ice bucket 34, a heater 36 provided on the periphery of the ice- (35).

Here, the ice-making tray 33 is provided with a space in which water is supplied from a water supply pipe (not shown) or the like and water is cooled by ice, and a plurality of molding spaces in which water can be received can be formed on the top surface . The molding space may have various shapes depending on the shape of the ice to be manufactured, and the quantity of the molding space can be variously adjusted.

The ice-making tray 33 may be made of a metal having a high thermal conductivity and the bottom surface of the ice-making tray 33 may be in contact with the ice making pipe 110. The contact portion 110a of the ice making pipe 110, which is in contact with the ice-making tray 33, may be provided in a U-shape. For example, the contact portion 110a of the ice-making pipe 110 starts to extend from one end of the ice-making tray 33 and is bent 180 ° in the vicinity of the other end of the ice-making tray 33, Lt; / RTI >

The contact portion 110a of the ice-making pipe 110 may be curved a plurality of times to reciprocate the bottom surface of the ice-making tray 33 a plurality of times. Alternatively, Or may be configured to be firmly attached to each other by a member or the like.

The refrigerant supplied from the refrigerant pipe 120 to the ice making pipe 110 is cooled by the direct heat exchange with the water contained in the ice making tray 33 at the contact portion 110a of the ice making pipe 110 And the cooled water can be phase-changed into ice. In other words, the contact portion 110a of the ice making pipe 110 can perform the same function as a miniaturized evaporator in the refrigeration cycle.

As described above, the present embodiment can generate ice by the direct cooling method through the solid-solid heat exchange between the ice making pipe 110 and the ice-making tray 33. On the other hand, in the case of the conventional refrigerator, the cool air provided from the refrigerator body is supplied to the ice-making tray of the ice-making section, and ice is generated by an indirect cooling method through gas-solid heat exchange. Accordingly, the present invention can remarkably shorten the generation time of ice through the excellent heat exchange performance according to the direct cooling system, as compared with the prior art.

The ice thus generated can be dropped by the rotary motor 36 into the ice bucket 34 disposed under the ice-making tray 33. At this time, the heater 35 heats the surface of the ice-making tray 33 for a short time to slightly dissolve the ice surface attached to the surface of the ice-making tray 33 so that the ice can be easily separated from the ice- .

When the upper surface of the ice-making tray 33 is rotated toward the ice bucket 34, the ice-making tray 33 is twisted by more than a specific angle, and the ice contained in the ice- It may fall into the ice bucket 34. The ice accumulated in the ice bucket 34 is inserted between the wings of the auger 37 and can be supplied to the user through a dispenser (not shown) provided on the door 20 when the auger 37 rotates have.

The direct cooling unit 100 includes an ice making pipe 110 installed in the ice making unit 30, a refrigerant pipe 120 installed in the refrigerator body 10, and a pair of ice making pipes 110 and 120, A control valve for selectively interrupting the flow of the refrigerant flowing between the ice making pipe 110 and the refrigerant pipe 120 and a pipe for enclosing the end of the refrigerant pipe 120, And may include a case 140.

The ice making pipe 110 may be installed in the ice making chamber 32 such that at least a portion (for example, the contact portion 110a) is in contact with the ice making tray 33 of the ice making portion 30. [ The refrigerant supplied to the ice making pipe 110 can rapidly cool the water through direct heat exchange with the water contained in the ice-making tray 33 at the contact portion 110a of the ice making pipe 110. [

The coolant pipe 120 is branched from the coolant line 45 of the cool air generating unit 40 and may be branched at the cool air generating unit 40 such that the end of the coolant pipe 120 is installed horizontally on the side wall of the refrigerator main body. The refrigerant pipe 120 includes a refrigerant pipe for supplying the refrigerant of the cold generating unit 40 to the ice making pipe 110 and a refrigerant pipe for reducing the refrigerant of the ice making pipe 110 to the cold generating unit 40 Gt; refrigerant < / RTI >

Since the refrigerant pipe 120 is connected to the ice making pipe 110 through the soft pipe 130, the refrigerant of the cold generating unit 40 can be supplied to or reduced from the ice making pipe 110. The refrigerant branched from the refrigerant line 45 to the refrigerant pipe 120 is moved to the ice making pipe 110 through the soft pipe 130 to cool the ice making unit 30, Can be moved to the refrigerant line (45) through the ice making pipe (110).

The flexible pipe 130 may be a refrigerant hose for connecting the ice making pipe 110 and the refrigerant pipe 120 in the opening and closing directions of the door 20 at the folded portions of the refrigerator body 10 and the door 20. [ For example, the flexible pipe 130 may be a flexible hose that can be expanded and contracted and may be bolted to the ends of the ice making pipe 110 and the refrigerant pipe 120.

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Particularly, since the soft pipe 130 is manufactured in a four-layer structure of an outer rubber layer, a reinforcing layer, an inner rubber layer, and a resin layer (nylon), cold loss can be reduced, and, in response to the opening / closing operation of the door 20, The refrigerant of the refrigerant pipe 120 installed in the main body 10 can be effectively transferred to the ice making pipe 110 provided in the door 20. [

The control valve may be an open / close valve 150 that selectively opens and closes the flow path of the refrigerant at the end of the refrigerant pipe 120 to selectively block the flow of the flow path between the ice making pipe 110 and the refrigerant pipe 120 have. 3, the opening and closing valve 150 may be installed at the end of the refrigerant pipe 120 and at the end of the ice-making pipe 110, respectively.

Accordingly, when the door 20 needs to be replaced, the refrigerant is prevented from flowing through the opening / closing valve 150 before the door 20 is replaced, thereby preventing the refrigerant from leaking out of the refrigerating unit 100 .

The pipe case 140 is a case for protecting the end portion of the refrigerant pipe 120 and may include a foaming agent such as urethane foam for heat insulation. Since the pipe case 140 covers the joint portion between the refrigerant pipe 120 and the flexible pipe 130, the quality of the appearance quality can be improved. The pipe case 140 may be provided with a case cover (not shown) for opening and closing the internal space.

6 is a block diagram illustrating a cool air generating unit of a refrigerator according to a first embodiment of the present invention.

As shown in FIG. 6, the cool air generating unit 40 can provide cool air to the freezing chamber and the freezing chamber through heat exchange between the coolant and the air (air) in the cooling duct (not shown).

For this purpose, the cold generator 40 includes an evaporator 41, a compressor 42 for converting the refrigerant discharged from the evaporator 41 into a gaseous refrigerant of high temperature and high pressure, a compressor 42 for converting the gaseous refrigerant into a high- And an expansion valve 44 for expanding the liquid phase refrigerant to provide the refrigerant to the evaporator 41.

In the compressor 42, the condenser 43, the expansion valve 44 and the evaporator 41, the refrigerant is heat-exchanged by the refrigeration cycle (compression-condensation-expansion-evaporation) Can be cooled by the cool air through heat exchange with the refrigerant of the heat exchanger (41). Here, the compressor 42, the condenser 43, and the expansion valve 44 configuration may share a refrigeration cycle for providing the refrigerant to the rotary compressor 100.

That is, some of the refrigerant may circulate in the refrigeration cycle composed of the evaporator 41, the compressor 42, the condenser, and the expansion valve 44 along the refrigerant line 45 to provide the freezing chamber and the refrigerating chamber with cold air, The other part is branched to the ice making pipe 110 through the refrigerant pipe 120 to cool the ice making unit 30 and then circulated to the refrigeration cycle composed of the compressor 42, the condenser 43 and the expansion valve 44 .

On the other hand, when the door 20 needs to be repaired as in the case of replacing the door 20, if the flow of the refrigerant in the direct cooling part 100 is blocked in advance through the opening of the door 20 and the opening / closing valve 150, It is possible to prevent the refrigerant from leaking from the refrigerant pipe 120 of the compressor 100 in advance.

7 is a block diagram showing a cool air generating unit of a refrigerator according to a modification of the first embodiment of the present invention.

As shown in FIG. 7, a three-way valve 160 may be provided at a branch point from the refrigerant line 45 to the refrigerant pipe 120. The three-way valve 160 can selectively block the flow of the refrigerant branched to the refrigerating unit 100, thereby replacing the function of the on-off valve 150 described above.

Hereinafter, the operation of the refrigerator according to the present embodiment having the above-described configuration will be described.

First, when a part of the refrigerant forming the refrigeration cycle in the refrigerator branches from the refrigerant line 45 to the refrigerant pipe 120, the refrigerant in the refrigerant pipe 120 is moved to the ice-making pipe 110 through the flexible pipe 130 . Since the flexible pipe 130 is made of a material that can be stretched and contracted in the opening and closing directions of the door 20, the refrigerant can be smoothly flowed between the refrigerant pipe 120 and the ice making pipe 110, .

The refrigerant moved to the ice-making pipe 110 can directly cool the ice-making tray 33 through the contact portion 110a. At this time, as the water supplied to the ice-making tray 33 is directly cooled by the contact portion 110a, the ice is rapidly changed due to a phase change. The ice produced in the ice-making tray 33 can be supplied to the user through the dispenser of the door 20 after being moved to the ice bucket 34 disposed below the ice-making tray 33.

Meanwhile, the refrigerant in the ice-making pipe 110, which is heat-exchanged with the ice-making tray 33, can be moved to the refrigerant pipe 120 through the soft pipe 130 again, May be included in the refrigeration cycle of the refrigerator through the refrigerator (45).

If the door 20 is required to be repaired as in the case of replacing the door 20, if the flow of the refrigerant in the refrigerating unit 100 is blocked in advance through the opening / closing valve 150, It is possible to prevent the refrigerant from leaking in advance.

FIG. 8 is a perspective view illustrating a refrigerator according to a second embodiment of the present invention, FIG. 9 is a state diagram illustrating a connection state between an ice making pipe, a refrigerant pipe, and a soft pipe in a refrigerator according to a second embodiment of the present invention .

8 to 9, in the refrigerator according to the second embodiment of the present invention, the refrigerating unit 100 is connected to the refrigerating unit 40 through the twistable soft pipe 130, 30, but the flow of the refrigerant through the control valve can be adjusted.

The structure of the refrigerator body 10, the door 20, the ice-maker 30 and the cold-generating unit 40 except for the direct cooling unit 100 is the same as that of the refrigerator shown in the first embodiment, The door 20, the ice-maker 30, and the cold-generating unit 40, detailed description thereof will be omitted.

However, the direct cooling unit 100 can provide the refrigerant of the cool air generating unit 40 to the ice making unit 30 through the twistable soft pipe 130 and can control the flow of the refrigerant through the open / close valve 150 have.

Here, the flexible pipe 130 can be twisted so as to connect the ice making pipe 110 and the refrigerant pipe 120 in the vertical direction of the door 20, at the hinge axis portions of the refrigerator body 10 and the door 20. [ It may be a refrigerant hose made of a flexible material. The flexible pipe 130 may be bolted to the ends of the ice making pipe 110 and the refrigerant pipe 120.

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As described above, the present invention can improve the cooling efficiency of the ice and the supply efficiency of the cool air by using the cool air directly cooled in the cooling duct, thereby improving the ice cooling efficiency and the cold air supply efficiency. It is possible to effectively reduce the loss of cold air, and consequently to reduce the power consumption due to the operation of the refrigerator.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

10: refrigerator body 20: door
30: ice making room 32: ice making room
33: Ice-making tray 35: Heater
40: cold air generating unit 41: evaporator
42: compressor 43: condenser
44: expansion valve 45: refrigerant line
100: direct cooling part 110: ice making pipe
120: refrigerant pipe 130: soft pipe
150: opening / closing valve 160: three way valve

Claims (3)

1. A refrigerator comprising: a refrigerator body formed with an outer appearance of a refrigerator and partitioned into a freezing chamber and a refrigerating chamber by a barrier;
A door installed at both side edges of the front surface of the refrigerator body to open and close the internal space of the refrigerator body;
An evaporator, a compressor for phase-changing the refrigerant discharged from the evaporator to a gaseous refrigerant at high temperature and pressure, a condenser for phase-changing the gaseous refrigerant to liquid refrigerant at a high pressure, and an expansion valve for providing the evaporator with the liquid- A cool air generating unit for circulating a coolant for supplying cool air to the inner space;
A refrigerant pipe installed in the refrigerator body to receive the refrigerant of the cold-generating unit;
An ice making pipe provided in the door to perform heat exchange with the refrigerant;
An ice tray provided on the door to provide an ice-making space; an ice-making tray for providing a frame to be in contact with the ice-making pipe to generate ice through heat exchange with the refrigerant; An ice bucket, and a heater provided on a periphery of the ice-making tray;
A flexible pipe for connecting the ice making pipe and the refrigerant pipe at a folded portion of the refrigerator body and the door so as to be twisted and expandable in a vertical direction of the door;
A control valve that interrupts the flow of the refrigerant before the door is replaced when the door needs to be replaced; And
And a pipe case surrounding the end of the refrigerant pipe and having a foaming agent for heat insulation,
Wherein the ice-making pipe includes a contact portion extending from one end of the ice-making tray to the other end and extending toward one end of the ice-making tray, and the contact portion is attached to the bottom surface of the ice-making tray by an adhesive or a fastening member, The tray is formed to cool the water through direct heat exchange with the water contained in the tray, to be curved a plurality of times, to reciprocate the bottom surface of the ice tray a plurality of times,
Wherein the flexible pipe is provided as a flexible wrinkle-shaped refrigerant hose made of a four-layer structure of an outer rubber layer, a reinforcing layer, an inner rubber layer and a resin layer. The method according to claim 1,
Wherein a part of the refrigerant is circulated to a freezing cycle of the freezing generating unit along a refrigerant line to provide freezing air to the freezing room and the freezing room,
And another part of the refrigerant is circulated to a refrigeration cycle composed of the compressor, the condenser, and the expansion valve after being branched to the freezing pipe through the refrigerant pipe to cool the freezing part. The method according to claim 1,
The heater
The ice surface of the ice-making tray is heated for a predetermined time to melt the ice surface attached to the surface of the ice-making tray, and the ice is discharged from the ice-making tray to the ice- Separated,
The ice-
And the ice stored in the ice-making tray is dropped into the ice bucket by twisting, so that the ice inserted between the auger's wings is discharged to the outside through the dispenser provided in the door.

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