KR102412126B1 - Ice machine and operation method thereof - Google Patents

Abstract

The present invention relates to an ice maker and an operating method thereof, and more particularly, to an ice maker capable of adjusting ice of various thicknesses requested by a user in stages, and an operating method thereof. To this end, an ice maker including a storage tank for accommodating ice-making water, an evaporator for cooling the ice-making water supplied from the storage tank, and a housing for protecting the storage tank and the evaporator from the outside. an interface unit generating an input signal for each thickness for and when the user input thickness exceeds a predetermined size of the reference ice-making thickness, a first sample interval for a unit thickness is calculated based on a ratio between the first ice-making period and the reference ice-making thickness, and in the first sample interval and a control unit for calculating a second sample interval for a unit thickness based on an average value of internal and external environment information, wherein the control unit calculates the first sample interval from the user input thickness according to a unit time that is a sum of the first and second sample intervals. Based on the variable information derived based on the ice-making period, a second ice-making period, which is a time interval for additional ice-making, is calculated.

Description

Ice maker and its operation method {ICE MACHINE AND OPERATION METHOD THEREOF}

The present invention relates to an ice maker and an operating method thereof, and more particularly, to an ice maker capable of adjusting ice of various thicknesses requested by a user in stages, and an operating method thereof.

An ice maker is a device that is provided in a refrigerator or an ice purifier to make ice.

Such an ice maker is a device for continuously producing ice blocks having a certain shape, and the ice maker is widely used in homes, restaurants, cafes, and the like. In particular, the ice maker supplies ice-making water stored in the ice-making water storage to the evaporator through a pump, and the evaporator makes ice to produce ice.

However, since the ice maker is operated by one system, the size of the generated ice is generally constant. Accordingly, there is a problem in that the user cannot select various sizes of ice according to the purpose of use of the ice or the size of the container.

Korean Patent Laid-Open Patent Publication 10-2012-0072719

The present invention is to solve the above problems, and an object of the present invention is to provide an ice-making time and additional ice-making to form a standard ice-making thickness based on the ice-making water level in a storage tank without an expensive sensor for detecting the size of the ice. An object of the present invention is to provide an ice maker capable of calculating an ice making time for forming a thickness input by a user and an operating method thereof.

Another object of the present invention is to provide an ice maker that allows a user to easily control it by a touch input through an interface and an operating method thereof.

These and other objects and advantages of the present invention will become apparent from the following description of preferred embodiments.

The above object is an ice maker including a storage tank for accommodating ice-making water, an evaporator for cooling the ice-making water supplied from the storage tank, and a housing for protecting the storage tank and the evaporator from the outside. An interface unit that generates an input signal for each thickness for adjusting, in response to the input signal for each thickness, detects the first ice-making cycle of the water level section corresponding to the reference ice-making thickness, and detects internal and external environmental information based on the housing When the thickness of the sensor unit and the user input exceeds a predetermined size of the reference ice-making thickness, a first sample interval for a unit thickness is calculated based on a ratio between the first ice-making period and the reference ice-making thickness, and the first sample interval and a control unit for calculating a second sample interval for a unit thickness based on an average value of internal and external environment information in This can be solved by the technical feature of calculating the second ice-making period, which is a time interval for additional ice-making, based on the variable information derived based on the first ice-making period.

According to an embodiment of the present invention, without an expensive sensor for detecting the size of the ice, the ice-making time for forming the reference ice-making thickness using the difference in the level of the ice-making water in the storage tank and the ice-making time for forming the user input thickness using additional ice making can be calculated.

In addition, it allows the user to easily adjust the touch input through the interface.

1A is a perspective view of an ice maker according to an embodiment of the present invention.
FIG. 1B is a view schematically showing the inside of the ice maker of FIG. 1 .
FIG. 2 is a block diagram of the ice maker of FIG. 1B according to an embodiment.
3A is a view for explaining an entire ice-making section corresponding to a thickness input by a user.
3B is a diagram for explaining a thickness of a user input formed in stages.
4 is a view schematically showing the inside and outside of the housing in order to explain an arrangement example of the sensor unit of FIG. 2 .
5 is a block diagram of the control unit of FIG. 1 according to an embodiment.
6 is an operation process for the ice maker of FIG. 2 .

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those of ordinary skill in the art that these examples are merely presented by way of example to explain the present invention in more detail, and that the scope of the present invention is not limited by these examples. .

Further, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in case of conflict, this specification, including definitions will take precedence.

In order to clearly explain the invention proposed in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are assigned to similar parts throughout the specification. And, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, "unit" described in the specification means one unit or block that performs a specific function.

In each step, identification numbers (first, second, etc.) are used for convenience of description, and identification numbers do not describe the order of each step, and each step does not clearly describe a specific order in context. It may be performed differently from the order specified above. That is, each step may be performed in the same order as the specified order, may be performed substantially simultaneously, or may be performed in the reverse order.

1A is a perspective view of an ice maker 100 according to an embodiment of the present invention, FIG. 1B is a view schematically showing the inside of the ice maker 100 of FIG. 1 , and FIG. 2 is a view of the ice maker 100 of FIG. 1B It is a block diagram according to an embodiment, and FIG. 3A is a diagram for explaining the entire ice-making section P _T corresponding to the user input thickness _DIN , and FIG. 3B is a user input thickness _DIN formed step by step. It is a drawing for explanation.

1A to 3B , the ice maker 100 according to an embodiment of the present invention includes a storage tank 101 , an evaporator 102 , a housing 103 , an interface unit 110 , a sensor unit 120 , and a control unit. 130 may be included.

First, as shown in FIG. 1B , the storage tank 101 is a container for accommodating ice-making water, and the evaporator 102 has a cooling line through which the refrigerant circulates to cool the ice-making water supplied from the storage tank 101 . can be provided In this case, the housing 103 may be formed to protect the storage tank 101 , the evaporator 102 , the interface unit 110 , a part of the sensor unit 120 , and the control unit 130 from the outside. Meanwhile, the evaporator 102 may further include a tray 102_1 for accommodating ice having a thickness of a predetermined length section.

For example, the storage tank 101 accommodates the ice-making water supplied through the ice-making water supply valve 101_1 to a certain height, and supplies the ice-making water to the evaporator 102 through the pump 101_2 to remove the falling ice water. can be reused. The one-way arrows shown in FIG. 1B are for explaining the circulation path of the ice-making water. In addition, the evaporator 102 is disposed above the storage tank 101 and formed in a plate shape, and when the ice-making water supplied to the plate-shaped surface reaches a freezing point, ice adheres to the surface, and then the ice gradually expands to make ice.

According to an embodiment, the interface unit 110 may receive a user input thickness _DIN and generate an input signal for each thickness for adjusting the ice-making thickness step by step. Here, the input signal for each thickness may be adjusted according to a user input.

Specifically, as shown in FIG. 1A , the interface unit 110 receives a user input from the user through the thickness control unit 110_1 and the driving input unit 110_2 , and generates an input signal for each thickness corresponding to the user input. to transmit to the controller 130 .

For example, the thickness adjusting unit 110_1 is implemented in a jog shuttle and button method to adjust the ice-making thickness step by step, and the driving input unit 110_2 is implemented in a button and lever method to check the ice-making thickness adjusted by the user. can be The thickness adjusting unit 110_1 and the driving input unit 110_2 may be implemented as a touch display 110_3 capable of a user touch input. Meanwhile, the interface unit 110 may further include a power switching unit 110_3 for turning on/off power.

Next, the sensor unit 120 detects the first ice-making period P1 in the water level section corresponding to the reference ice-making thickness D _R according to the input signal for each thickness generated through the interface unit 110, and the It is possible to detect internal and external environmental information based on the housing.

Here, the first ice-making cycle P1 is the initial time T1 at the high-level position P _H of the ice-making water sensed by the sensor unit 120 and the low-level position of the ice-making water detected by the sensor unit 120 . It may be a time interval between the end time point T2 at ( _PL ). That is, the first ice-making period P1 may be an ice-making time for forming a reference ice-making thickness using information on the level of ice-making water in the storage tank.

Next, the control unit 130 operates the sensor unit 120 based on the input signal for each thickness received from the interface unit 110 and supplies ice-making water to the storage tank 101 through the ice-making water supply valve 101_1 . and the ice making water may be supplied from the storage tank 101 to the evaporator 102 through the pump 101_2.

According to an embodiment, when the user input thickness D _IN exceeds a predetermined size greater than the reference ice-making thickness D _R , the controller 130 performs the first ice-making cycle P1 to obtain a time interval for additional ice-making. The first sample section S1 for the unit thickness D _U may be calculated based on the ratio of the ice-making thickness D _R and the reference ice-making thickness D R . That is, the controller 130 may calculate the first sample section S1 for the unit thickness D _U through the following ratio formula (1).

(1)이고, P1은 제1 제빙주기, D_R은 기준 제빙 두께, S1은 제1 샘플 구간 및 D_U는 단위 두께를 의미한다. Here, ratio formula (1) is

(1), P1 is the first ice-making cycle, D _R is the reference ice-making thickness, S1 is the first sample section, and D _U is the unit thickness.

In this case, the unit thickness D _U is an ice thickness preset in advance by an administrator and a user, and may be limited to be formed smaller than the reference ice-making thickness D _R .

For example, when the first ice-making cycle P1 is 4000 seconds, the reference ice-making thickness D _R is 100 mm, and the unit thickness D _U is 1 mm, the first sample section S1 is shown in FIG. 3A . As described above, the time interval between T2 and T3 may be 40 seconds.

Also, the controller 130 may calculate the second sample period S2 for the unit thickness D _U based on the average value of the internal and external environment information in the first sample period S1 . Here, the meaning of the second sample section S2 may mean a delay time during ice making of a unit thickness D _U according to internal and external environmental information.

Specifically, the control unit 130 receives the difference between the average value of the internal and external environmental information in the first sample period (S) and the preset weight for each environmental information item, through the second sample period calculation formula (2), the unit thickness D _U ) for the second sample interval S2 may be calculated.

이고, 이때, C_AINS1은 제1 샘플 구간(S1)에서의 외부 환경정보에 대한 평균값이고, C_AOUTS1은 제1 샘플 구간(S1)에서의 내부 환경정보에 대한 평균값이며, τ는 환경정보 항목별로 기설정된 가중치를 의미할 수 있다. Here, the second sample interval calculation formula (2) is

In this case, C _AINS1 is the average value of the external environmental information in the first sample section (S1), C _AOUTS1 is the average value of the internal environmental information in the first sample section (S1), τ is the environmental information item It may mean a preset weight.

For example, when the average value of the external environment information in the first sample section S1 is 40°C, the average value of the internal environment information in the first sample section S1 is 10°C, and the preset weight for the temperature item is 15 , the second sample interval S2 for the unit thickness D _U may be 45 seconds, which is a time interval between T3 and T4 as shown in FIG. 3A .

According to an embodiment, in order to determine a preset weight τ for each environmental information item, the control unit 130 uses the following first weight arithmetic equation (3) and second weight arithmetic equation (4) to determine at least two weights. weights can be calculated. In this case, the controller 130 may determine an average value between at least two weights as a weight τ preset for each corresponding environment information.

이고, 이때, T_D는 기설정된 제빙수를 공급 및 배출하는데 소요되는 작동 시간, C_T1OUT은 제1 제빙 주기의 초기 시점(T1)의 외부 환경정보 및 C_T1OUT은 제1 제빙 주기의 초기 시점(T1)의 내부 환경정보일 수 있다. Here, the first weight calculation equation (3) is

In this case, T _D is the operation time required to supply and discharge the preset ice-making water, C _T1OUT is the external environment information of the initial time point T1 of the first ice-making cycle, and C _T1OUT is the initial time point of the first ice-making cycle ( It may be the internal environment information of T1).

For example, when P1 is 4000 seconds, T _D is 3964 seconds, the temperature that is the external environmental information at the initial time point T1 is 32°C, and the temperature that is the internal environmental information at the initial time point T1 is 16°C, The first weight may be 18.

이고, 이때, T_D는 기 기설정된 제빙수를 공급 및 배출하는데 소요되는 작동 시간, C_T2OUT은 제1 제빙 주기의 종료 시점(T2)의 외부 환경정보 및 C_T2OUT은 제1 제빙 주기의 종료 시점(T2)의 내부 환경정보일 수 있다. In addition, the second weight calculation formula (4) is

, where T _D is the operation time required to supply and discharge the preset ice-making water, C _T2OUT is the external environment information of the end time (T2) of the first ice-making cycle, and C _T2OUT is the end time of the first ice-making cycle It may be the internal environment information of (T2).

For example, when P1 is 4000 seconds, T _D is 3964 seconds, the temperature that is the external environmental information at the initial time point T1 is 40° C., and the temperature that is the external environmental information at the initial time point T1 is 10° C., The second weight may be 12. Accordingly, the weight τ preset in the environmental information temperature item may be 15, which is an average value of 18 and 12, which are the first and second weights.

That is, the control unit 130 calculates the weight for each time point based on the temperature difference between the inside and the outside at each specific point in the first ice making cycle P1, the first ice making cycle P1, and the delay time according to the preset ice making water supply, By averaging these, it is possible to determine a preset weight for each environmental information item in advance.

As a result, the controller 130 is derived based on the first ice-making period P1 from the user input thickness _DIN according to the unit time T _U that is the sum of the first and second sample periods S1 and S2. Based on the variable information, it is possible to calculate a second ice-making period P2, which is a time interval for additional ice-making. That is, the second ice-making period P2 may be an additional ice-making time for forming a user input thickness using additional ice-making based on the reference ice-making thickness D _R .

Here, the unit time (T _U ) means a unit time section in which ice is made with a unit thickness (D _U ), and may include first and second sample sections ( S1 and S2 ). For example, when the first sample interval S1 for the unit thickness D _U is 40 seconds and the second sample interval S2 for the unit thickness D _U is 45 seconds, the unit time T _U ) may be 85 seconds, which is a time interval between T2 and T4.

In this case, the variable information may be calculated through the following formula (5).

이고, 이때, D_IN은 사용자 입력 두께이고, D_R은 기준 제빙 두께이며, D_U는 단위 두께일 수 있다. Here, the formula (5) is

_In this case, DIN may be a user input thickness, D _R may be a reference ice-making thickness, and D _U may be a unit thickness.

For example, when the user input thickness D _IN is 60 mm, the reference ice-making thickness D _R is 20 mm, and the unit thickness D _U is 10 mm, the variable information may be 4. As shown in FIG. 3B , the control unit 130 calculates the values calculated through the ratio equation (1), the second sample interval calculation equation (2), the first weight arithmetic equation (3), and the second weight arithmetic equation (4). The product of the unit thickness (D _U ) and the variable information calculated through Equation (5) is 40 mm to calculate the additional ice-making thickness (D _A ).

That is, the user input thickness (D _IN ) corresponding to the entire ice-making section (P _T ) is the sum of the reference ice-making thickness (DR ) and the additional ice-making thickness (D _A ), and the additional ice-making thickness ( _{D A )} is the unit thickness ( D _U ) and variable information.

In this way, as shown in FIG. 5 , the controller 130 calculates the second ice-making period P2 by multiplying the variable information and the unit time T _U , and the first ice-making period P1 and the second ice-making period ( By calculating the total ice making section P _T by adding P2), ice can be made with the user input thickness _DIN corresponding to the entire ice making section P _T .

Here, the second ice-making period P2 refers to a time section in which additional ice is made, and may be a product of variable information and a unit time T _U . For example, the second ice-making period P2 may mean a time interval between T2 and T5, and the entire ice-making period P _T may mean a time interval between T1 and T5.

Thereafter, the control unit 130 calculates the total ice-making period P _T by adding the first ice-making period P1 and the second ice-making period P2 to the first ice-making period P1 through the interface unit 110 , The second ice-making period P2 and the entire ice-making period P _T may be displayed.

Hereinafter, the configuration of the present invention and its effects will be described in more detail through specific examples and comparative examples. However, these examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

4 is a view schematically showing the inside and outside of the housing 103 in order to explain an arrangement example of the sensor unit 120 of FIG. 2 .

2 and 4 , the sensor unit 120 may include first and second sensor units 121 and 122 .

First, the first sensor unit 121 receives the first and second levels through the first and second water level sensors 121_1 and 121_2 spaced apart from each other by a reference distance d2 according to the input signal for each thickness generated through the interface unit 110 . An initial time point T1 and an end time point T2 of one ice-making cycle P1 may be detected.

In this case, the second water level sensor 121_2 may be formed to be transported up and down along the sidewall of the storage tank 101 based on a user's correction input for the reference ice-making thickness D _R .

Meanwhile, in FIG. 4, the storage tank 101 and the evaporator 102 are connected through the supply pipe 102_2 and the discharge pipe 102_3, but this is not limited thereto. As shown in FIG. 1b, only the supply pipe 102_2 connected, the storage tank 101 may be disposed below the evaporator 102 and the ice tray 102_1. At this time, the bottom surface of the ice tray 102_1 may be formed in a mesh shape so that the ice-making water can be dropped.

Specifically, as shown in FIG. 4 , the first water level sensor 121_1 is disposed at a predetermined high water level position P _H on one side wall of the storage tank 101 , and the water level of the ice-making water is set at the high water level position P _H . It is possible to measure the initial time point T1, which is time information when it is detected as .

In addition, the second water level sensor 121_2 is disposed at a preset low water level position P _L on one side wall of the storage tank 101, and is time information when the water level of the ice making water is detected as the low water level position P _L The time point T2 can be measured.

According to the embodiment, the second water level sensor 121_2 is disposed to be spaced apart from the bottom surface of the storage tank 101 by a first distance d1 in the upper direction, and the first water level sensor 121_1 is the bottom surface of the storage tank 101 . may be disposed to be spaced apart from the second water level sensor 121_2 by a second distance d2 in the upper direction. Here, the first distance d1 may be set to be at least twice as large as the second distance d2 corresponding to the reference distance.

Next, the second sensor unit 122 detects internal environmental information through the internal environmental sensor 122_1 disposed inside the housing 101, and through the external environmental sensor 122_2 disposed outside the housing 101 External environmental information can be detected.

Here, the internal environmental information may include an ice-making water temperature, a cooling water temperature, atmospheric pressure, humidity, and temperature inside the housing 101 , and the external environmental information may include an atmospheric pressure, humidity, and temperature outside the housing 101 .

Specifically, as shown in FIG. 4 , a plurality of internal environmental sensors 122_1 are disposed inside the housing 101 to be positioned adjacent to each component, and the external environmental sensors 122_2 are provided in the housing 101 . A plurality of vents may be attached and disposed adjacent to the ventilation holes 103_1.

Hereinafter, with reference to FIG. 5 , the control unit 130 will be described in more detail.

5 is a block diagram of the controller 130 of FIG. 1 according to an embodiment.

Referring to FIG. 5 , the control unit 130 may include an ice removal machine control unit 131 , a feedback unit 132 , and a variable ratio correction unit 133 .

First, after the entire ice-making section P _T , the ice-removing machine control unit 131 may remove (de-ice) the ice made in the evaporator 102 through the ice-removing machine 104 . Here, the ice remover 104 may be a heater that increases the temperature of the evaporator to remove ice formed in the evaporator 102 .

Next, the feedback unit 132 may receive a feedback signal for the thickness of the ice removed through the ice remover 104 from the user through the interface unit 110 . Here, the feedback signal may include a confirmation input signal indicating that the ice thickness is appropriate and a correction thickness input signal for requesting a predetermined size correction of the ice thickness.

Next, when the feedback signal is the correction thickness input signal, the variable correction unit 133 may determine the additional ice-making thickness as an ice-making failure. At this time, the variable correction unit 133 is a correction thickness corrected according to the first difference value between the user input thickness (D _IN ) and the reference ice-making thickness ( _{DR ) and the correction input signal according to the correction thickness input signal (D INR )} Variable information may be corrected based on the ratio of the second difference value between and the reference ice-making thickness D _R .

For example, when the correction input signal is a 10 mm increase request signal, the reference ice-making thickness D _R is 20 mm, the user input thickness D _IN is 100 mm, and the variable information is 4, the variable correction unit 133 is Based on the ratio of the first difference value '80mm' and the second difference value '90mm', the variable information '4' may be corrected to '4.5'.

FIG. 6 is an operation process for the ice maker 100 of FIG. 2 .

1 to 6 , first, in step S110 , the interface unit 110 may receive a user input thickness _DIN from a user and generate an input signal for each thickness for adjusting the ice-making thickness. In this case, the interface unit 110 may transmit an input signal for each thickness to the control unit 130 .

Then, in step S120 , the sensor unit 120 detects the first ice-making cycle P1 in the water level section corresponding to the reference ice-making thickness D _R according to the input signal for each thickness received through the control unit 130 . And, it is possible to sense internal and external environmental information based on the housing 103 .

At this time, in step S130 , when the user input thickness D _IN exceeds a predetermined size than the reference ice-making thickness D _R , the controller 130 controls the interval between the first ice-making cycle P1 and the reference ice-making thickness D _R . Based on the ratio, the first sample section S1 for the unit thickness D _U may be calculated.

Then, in step S140 , the controller 130 may calculate the second sample section S2 for the unit thickness D _U based on the average value of the internal and external environment information in the first sample section S1 .

In this case, in step S150 , the control unit 130 based on the variable information derived from the user input thickness based on the first ice-making period P1 according to the unit time T _U that is the sum of the first and second sample intervals. Accordingly, the second ice-making period P2, which is a time interval for additional ice-making, may be calculated.

Thereafter, in step S160 , the control unit 130 calculates the total ice-making period P _T by adding the first ice-making period P1 and the second ice-making period P2 to the first ice-making period through the interface unit 110 . (P1), the second ice-making period P2, and the entire ice-making period P _T may be displayed.

In this specification, only a few examples among the various embodiments performed by the present inventors are described, but the technical spirit of the present invention is not limited or limited thereto, and it is of course that it may be modified and variously implemented by those skilled in the art.

100: ice machine
110: interface unit
120: sensor unit
130: control unit

Claims (5)

An ice maker comprising: a storage tank containing ice-making water; an evaporator for cooling the ice-making water supplied from the storage tank; and a housing for protecting the storage tank and the evaporator from the outside;
an interface unit that receives a user input thickness and generates an input signal for each thickness for step-by-step adjustment of the ice-making thickness;
a sensor unit configured to sense a first ice-making cycle in a water level section corresponding to a reference ice-making thickness according to the input signal for each thickness, and to sense internal and external environmental information based on the housing; and
When the user input thickness exceeds a predetermined size of the reference ice-making thickness, a first sample interval for a unit thickness is calculated based on the ratio between the first ice-making period and the reference ice-making thickness, and inside and outside the first sample interval A control unit for calculating a second sample section for a unit thickness based on the average value of the environmental information,
The control unit is
A second ice-making period, which is a time period for additional ice-making, is calculated based on variable information derived from the user input thickness based on the first ice-making period according to a unit time that is the sum of the first and second sample periods,
The control unit calculates the first sample interval through the following ratio equation,
Here, ratio formula (1) is

(1), P1 is the first ice-making cycle, D _R is the reference ice-making thickness, S1 is the first sample interval, and D _U is the unit thickness,
The second sample interval is calculated through the following second sample interval calculation formula (2),
Here, the second sample interval calculation formula (2) is

In this case, C _AINS1 is the average value of the external environment information in the first sample period S1, C _AOUTS1 is the average value of the internal environment information in the first sample period S1, τ is the environmental information item An ice maker, which is a preset weight. delete According to claim 1,
The sensor unit may include: a first sensor unit configured to sense an initial time and an end time of the first ice-making cycle through first and second water level sensors spaced apart from each other by a reference distance according to the input signal for each thickness; and
A second sensor unit for detecting internal environmental information through a plurality of internal environmental sensors disposed inside the housing, and detecting external environmental information through a plurality of external environmental sensors disposed outside the housing,
A second distance between the second water level sensor and the bottom surface of the reservoir is set to be at least twice greater than the first distance between the first and second water level sensors,
and the second water level sensor is configured to be moved up and down along one sidewall of the storage tank based on a user's request for modification of the reference ice-making thickness. According to claim 1,
The control unit may include: an ice maker control unit configured to remove ice made in the evaporator through an ice eliminator provided inside the housing after an entire ice making section that is the sum of the first and second ice making cycles;
a feedback unit for receiving a feedback signal for the thickness of ice removed through the ice removal machine from a user through the interface unit;
When the feedback signal is the correction thickness input, the additional ice-making thickness is determined as an ice-making failure, and the ratio of the first difference value between the user input thickness and the reference ice-making thickness and the second difference value between the correction thickness and the reference ice-making thickness An ice maker comprising a variable correction unit that corrects variable information based on delete

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