KR20190083434A - Refrigerator and Control method of refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator and a control method thereof. The refrigerator comprises a control unit in which an ice removing motor is driven to rotate an ice tray at a predetermined angle to accelerate freezing when temperature of the ice tray reaches a first predetermined temperature. Moreover, the first predetermined temperature is set as temperature between a second predetermined temperature and 0°C for determining completion of ice making.

Description

[0001] The present invention relates to a refrigerator and a refrigerator,

The present invention relates to a refrigerator and a control method of the refrigerator.

Generally, a refrigerator is a household appliance that allows low-temperature storage of food in an internal storage space that is shielded by a door. To this end, the refrigerator is configured to cool the inside of the storage space by using cool air generated through heat exchange with the refrigerant circulating in the refrigeration cycle, thereby storing the stored food in an optimum state.

The inside of the refrigerator may include a refrigerator compartment and a freezer compartment. Inside the refrigerator compartment and the freezer compartment, a receiving member such as a shelf, a drawer, and a basket is provided. The refrigerator compartment and the freezer compartment are shielded by a door. The refrigerator is variously classified according to the arrangement of the refrigerator compartment and the freezer compartment and the type of the door.

[0003] The refrigerator is becoming increasingly multifunctional in accordance with changes in dietary life and products, and refrigerators having various structures and convenience devices for users' convenience have been introduced.

For example, the refrigerator may be equipped with an ice maker for making ice, and the ice is de-iced by supplying cool air, and the ice is stored in the oven and can be taken out to the user when desired.

On the other hand, the ice made by the ice maker must be able to make ice quickly, and when the completion of ice-making is delayed, power consumption may increase and the food in the space adjacent to the ice maker may be overcooled.

On the other hand, in the conventional refrigerator, when the door is not opened for a long time or is kept for a long time in a stable state, the freezing point of the water supplied to the ice maker does not freeze at 0 ° C and maintains the supercooled state, Which will be described in more detail with reference to the drawings.

FIG. 1 is a graph showing changes in tray temperature according to an elapsed time of an ice making operation according to the related art.

As shown in the figure, the ice-making operation as a whole may be performed in the water supplying step S1, the ice making step S2, and the ice-making step S3.

In detail, when the ice-making operation is started, a watering step (S1) in which water is supplied to the ice tray of the ice maker is performed. In the water supply step (S1), the water supply valve is opened to fill the ice tray with water for ice-making. During the watering step (S1), the temperature of the ice tray is continuously increased, and the temperature of the ice tray is increased until the water supply is completed.

When the water supply is completed, an ice-making step S2 may be performed in which cooling for ice-making is performed substantially. The blowing fan is driven at the start of the ice making step S2 and the cold air can be supplied toward the ice maker by driving the blowing fan and the temperature of the ice tray is lowered. Of course, the driving of the blowing fan is not limited to that performed at the start of the ice making step S2, and may be started simultaneously with water supply or water supply.

In the icing step S2, the temperature of the ice tray is continuously lowered, and icing may start at a temperature of 0 ° C or lower. However, if the door of the refrigerator is not opened or closed for a long time immediately after the water supply, the water stored in the ice tray may become stabilized or metastable. In such a state, have.

That is, the water stored in the ice tray maintains the state of the liquid that has not undergone the phase change, and the temperature of the ice tray is continuously decreased at the same slope as in FIG. If the temperature is continuously lowered in this state and the temperature reaches approximately -8 캜, which is the temperature at which the ice-making is determined to be completed, a problem may be caused that the ice-making is completed.

Of course, a phase change may occur before reaching -8 ° C and freezing may start, but when a phase change occurs in a state where the temperature is lowered to about -6.5 ° C, the water starts to freeze instantaneously as shown in the figure, The temperature of the ice tray rises due to the changed phase change. In this state, additional cooling is required to reach -8 ° C, the temperature at which ice-making is completed.

That is, when the supercooling is generated, additional cooling is required as much as the temperature rise occurring in the phase change, which may increase the time of the entire ice making operation. In addition, there is a problem in that the food inside the space where the ice maker is disposed can be overcooled due to excessive supply of cold air due to the overcooling.

When the temperature of the ice tray reaches -8 DEG C, which is the temperature at which the ice tray is to be completed, the ice making step S2 is ended and the ice making step S3 is performed. In the ice-releasing step S3, it is determined that the ice is completed in the ice tray, and the ice of the ice tray is released. When the ice-making is completed, the entire ice-making operation can be terminated. If it is determined that additional ice-making is required, the ice-making operation is performed again.

As described above, in the conventional general ice-making operation, the total ice-making operation time due to the supercooling is about 40 minutes or more, the power consumption due to the increase of the ice-making operation time, the problem of the ice- Which may cause damage to the surrounding food.

In addition, Korean Patent Laid-Open Publication No. 10-2016-0046551 proposes various techniques such as a control method of a refrigerator in which water supplied to a tray is split and watered to shorten an ice making time in order to further improve the ice making speed.

It is an object of the present invention to provide a refrigerator and a control method of a refrigerator which can shorten an icing time and reduce power consumption.

An object of the present invention is to provide a refrigerator and a control method of a refrigerator which can minimize undesired operation of ice making and prevent overcooling in the hearth.

An object of the present invention is to provide a refrigerator and a control method of a refrigerator which can prevent an error of ice making completion judgment and improve the ice making performance and the reliability of the ice making operation.

A refrigerator according to an embodiment of the present invention includes: a cabinet having a storage space opened and closed by a door; An ice tray disposed in an area of the storage space and storing water supplied; A blower fan for supplying cold air to the ice tray; An ice-making motor coupled to the ice tray and rotating the ice tray for ice-making; A temperature sensor provided in the ice tray and measuring a temperature of the ice tray; And a control unit for accelerating freezing when the temperature of the ice tray reaches a first predetermined temperature by rotating the ice tray by a predetermined angle by driving the ice tray motor, 2 set temperature and 0 < 0 > C.

The controller may drive the ice-making motor so that the rotation angle of the ice tray rotated at the first set temperature is smaller than the rotation angle at the time of ice-breaking.

The ice tray may be provided inside the cabinet.

The ice tray may be provided on a rear surface of the refrigerator door.

A method of controlling a refrigerator according to an embodiment of the present invention includes: a water supply step of supplying water to an ice tray for ice making; An ice making step of supplying cold air to the ice tray; Wherein the ice tray is rotated at a predetermined angle when the temperature of the ice tray reaches a first set temperature in the ice making step, And the first set temperature is set to a temperature between 0 ° C and a second set temperature for judging completion of ice making.

It is possible that the rotation angle of the ice tray rotated at the first set temperature is smaller than the rotation angle of the ice tray.

The rotation of the ice-making motor for accelerating freezing in the ice-making step may be performed a plurality of times.

(A) of the ice tray before the temperature of the ice tray reaches the first set temperature and the temperature gradient (A) of the ice tray after the ice tray is rotated And further determines the additional operation of the ice-making motor for accelerating the freezing.

It is possible to perform the additional rotation of the freezing motor when the error between the tilt A and the tilt B is equal to or smaller than the set magnitude.

When the inclination B is smaller than 0, it is possible to further rotate the ice-making motor.

It is possible that the ice-making step is carried out when the error between the slope A and the slope B is equal to or larger than the set size and the ice tray temperature reaches the second set temperature.

It is possible that the unfreezing step is performed when the error between the tilt A and the tilt B is equal to or larger than the set size and the icing step is continued for a set time or more.

According to the control method of the refrigerator and the refrigerator according to the embodiment of the present invention, the following effects can be expected.

The ice tray is rotated at a set temperature lower than the freezing point in the ice making step in which cold air is supplied so that the water supplied into the ice tray can be shaken to prevent the supercooled state from entering the supercooled state or to eliminate the supercooled state, .

Accordingly, it is possible to prevent the water stored in the ice tray from being overcooled, thereby accelerating the freezing speed and shortening the entire ice making operation time. In addition, there is an effect that the power consumption can be reduced by shortening the time of the ice making operation.

In addition, the ice tray is capable of originally blocking the entry of the supercooled state by only slightly rotating the ice tray at a predetermined angle irrespective of whether the ice tray is supercooled at a set temperature below the freezing point or not, There is an advantage that damage due to supercooling of food in the space can be prevented. In particular, even if the supercooling degree is temporarily deviated from the supercooling degree temporarily by the driving of the ice-maker motor, the supercooling degree can be minimized by preventing the supercooling by driving the ice- There is an advantage to be able to.

In addition, by preventing the ice tray from entering or being kept in the supercooled state, it is possible to prevent the error that the ice tray temperature is lowered to a temperature close to the freezing temperature in the supercooled state to judge that the ice making is finished, thereby improving the ice making performance and reliability The effect can be expected.

FIG. 1 is a graph showing changes in tray temperature according to an elapsed time of an ice making operation according to the related art.
2 is a view illustrating a door of a refrigerator opened according to an embodiment of the present invention.
3 is an exploded perspective view of an ice maker according to an embodiment of the present invention.
FIG. 4 is a block diagram schematically showing a control signal flow in the configuration for the icemaker operation of the refrigerator.
5 is a flowchart sequentially showing the ice making operation of the refrigerator.
FIG. 6 is a graph showing changes in tray temperature over time of the ice making operation of the refrigerator.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

In particular, embodiments of the present invention will be described with reference to an ice maker provided in a freezer compartment door of a side by side refrigerator for convenience of explanation and understanding. It should be noted that it is applicable to all types of refrigerators that can be refrigerated.

2 is a view illustrating a door of a refrigerator opened according to an embodiment of the present invention.

Referring to the drawings, a refrigerator (1) according to an embodiment of the present invention includes a cabinet (10) having a storage space formed therein and forming an outer shape, a door for selectively shielding an opened front face of the cabinet So that an external shape can be formed.

The inside of the cabinet 10 is partitioned to the left and right by the barrier 11 to form a freezing chamber 12 and a refrigerating chamber 13. The inside of the freezing chamber 12 and the refrigerating chamber 13 A number of shelves and drawers may be provided.

The rear wall of the freezing compartment 12 may be formed by a grill fan 15. An evaporator 14 for supplying cool air for cooling the freezing compartment 12 is provided at the rear of the grill pan 15 .

A cool air discharge port 151 is provided above the grill pan 15 or above the rear wall of the freezer compartment 12 and a blower fan 16 may be provided behind the grill pan 15. The cooling air generated in the evaporator by the blowing fan 16 can be supplied to the interior space through the cooling air outlet 151. The indoor air is cooled by heat exchange with air in the interior space, To be circulated.

The door may be composed of a freezing chamber door 21 and a freezing chamber door 22 for shielding the freezing chamber 12 and the freezing chamber 13. The freezing chamber door 21 and the freezing chamber door 22 are connected to each other, And is rotatably mounted to the cabinet 10 to selectively open and close the freezing compartment 12 and the refrigerating compartment 13. [

Meanwhile, a dispenser (not shown) may be provided on the front surface of the freezing chamber door 21. The dispenser may be configured to extract purified water used as drinking water or ice made in the ice maker 100 described below from the outside.

The ice maker 100 may be provided on the rear surface of the freezer compartment door 21. The ice maker 100 is a device for making ice by automatically freezing water to be supplied to the ice maker 100 so that the ice can be automatically separated from the ice maker 100 after the ice is produced.

The ice maker 100 includes an ice tray 120 in which water to be automatically supplied for ice making is received and becomes ice and ice sheets 120 for rotating the ice tray 120 to freeze ice from the ice tray 120. [ A motor 111 and a temperature sensor 123 for measuring the temperature of the ice tray 120. [ The construction of such an ice maker 100 is general, and a detailed description thereof will be omitted.

An ice bank 23 may be provided below the ice maker 100 to store the ice made by the ice maker 100 before the ice is taken out to the dispenser. The ice bank 23 stores the ice made by the ice maker 100 and is configured so that the ice separated from the ice maker 100 can be dropped.

The ice bank 23 is configured to communicate with the dispenser so that the ice stored in the dispenser can be supplied. The ice maker 100 and the ice bank 23 may be integrally mounted on a door liner forming the back surface of the freezer compartment door 21, Some may be configured to be accommodated.

Of course, the ice maker 100 may be provided in the form of being exposed to the inside of the freezing compartment space, if necessary, or may be provided in the inner area of the freezing compartment 12, not the freezing compartment door 21. The ice maker 100 may be provided in a separate heat insulating space provided in the refrigerating compartment 13 or the refrigerating compartment 13.

An inlet 241 may be provided at one side of the cover 24 above the ice maker 100 to serve as an inflow passage for cold air for ice making. The inlet 241 may be located at a position facing the cold air discharge opening 151. Therefore, the cool air discharged from the cool air discharge port 151 flows into the ice maker 100 through the inlet 241 to freeze the water contained in the ice tray to make ice.

Of course, a separate flow path may be formed in the ice maker 100 so that cold air is directly supplied to the ice maker 100 without passing through the inside of the freezing compartment 12.

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

The ice maker 100 includes a driving unit 110 having an ice making motor 111 as a whole and an ice tray 120 coupled to the ice making motor 111 to receive ice for ice making, And the like.

The driving unit 110 includes a driving unit case 114 forming an outer shape, an ice-making motor 111 accommodated in the driving unit case 114, and a plurality of gears coupled with the ice-making motor 111 . A tray rotating shaft 112 coupled with the ice tray 120 and a lever rotating shaft 113 coupled to the ice-making sensing lever 140 may protrude from one side of the driving unit case 114.

The ice tray 120 includes a plurality of partitioned cells 121, and the ice tray 120 is frozen. One end of the ice tray 120 may be coupled to the tray rotation shaft 112 of the driving unit 110 and the other end of the ice tray 120 may be coupled to the shaft coupling unit 133 of the tray cover 130. [ And is rotatable. The ice tray 120 may be rotatably connected to the ice-making motor 111 directly or indirectly.

A temperature sensor 123 may be provided on the lower surface of the ice tray 120. The temperature sensor 123 senses the temperature of the ice tray 120 and senses the temperature of the ice tray 120 to determine completion of ice-making.

A tray cover 130 may be provided above the ice tray 120 to prevent cold air from being supplied to the ice tray 120 and to prevent water from overflowing the ice tray 120.

The tray cover 130 may have a structure in which the driving unit 110 and the ice tray 120 are fixed. The ice tray 120 may include a rim 131 formed along an upper surface of the ice tray 120 and an opening 132 formed between the rim 131 and the ice tray 120.

The cool air directed toward the ice maker 100 can be concentrated on the upper surface of the ice tray 120 through the opening 132 and thus the water contained in the cell 121 can be effectively cooled and ice-cooled.

When the ice making operation is in progress, the lower end of the rim 131 is brought into contact with the upper surface of the ice tray 120, so that the ice tray 120 can be prevented from overflowing.

A full ice sensing lever 140 may be provided on one side of the driving unit 110. The ice-making sensing lever 140 is formed with a shaft coupling part 141 connected to the lever rotation shaft 113 of the driving part 110 and extends along the ice tray 120 below the ice tray 120 .

The ice-making sensing lever 140 may be interlocked with the operation of the ice-making motor 111 and may detect whether ice stored in the ice bank 23 is completely ice- Or < / RTI >

Hereinafter, the icing operation of the refrigerator according to the embodiment of the present invention will be described.

FIG. 4 is a block diagram schematically showing a control signal flow in the configuration for the icemaker operation of the refrigerator. 5 is a flowchart sequentially showing the ice making operation of the refrigerator.

Referring to the drawings, the ice-making operation may include a water supplying step S1, an ice-making step S2, and an ice-making step S3 as a whole.

At the start of the ice-making operation, the water supply step S1 is performed. In the control unit 17, the water supply valve 150 is opened to start water supply to the ice tray 120. The water to be supplied may be supplied for a predetermined time or at a constant flow rate and may be supplied to fill all the cells 121 of the ice maker 100. When the amount of water set in the ice tray 120 is supplied, the controller 17 closes the water supply valve 150 to complete water supply. When the water supply is completed, the water supply step (S1) ends. [S100]

The ice making step S2 is started at the end of the water supplying step S1. At the start of the ice making step S2, the control unit drives the blowing fan 16. The cool air generated by the evaporator 14 may be supplied to the ice maker 100 by driving the blowing fan 16. The water supplied to the ice tray 120 can be cooled by driving the blowing fan 16. [S100]

The driving time of the blowing fan 16 can be calculated by the timer 171 together with the driving of the blowing fan 16. The control unit 17 determines whether the blowing fan 16 is driven for a first set time T1 in a state where the water supply valve 150 is closed after water supply is completed.

The first set time T1 may be set to a temperature at which the ice tray 120 is sufficiently cooled and an accurate temperature change can be sensed through the temperature sensor 123. [ For example, the first set time T1 may be set to approximately one minute during which the ice tray 120 is substantially cooled. [S210]

The control unit 17 measures the temperature of the ice tray 120 sensed by the temperature sensor 123 and stores the measured temperature in the storage unit do. The temperature sensor 123 may be continuously measured until the temperature of the ice tray 120 reaches the first set temperature t1 and may be stored in the storage unit.

The control unit 17 may calculate the slope of the temperature change of the ice tray 120 through the measured temperature change of the ice tray 120. The calculated slope A may also be stored in the storage unit 172 ). ≪ / RTI > Then, it is possible to determine the progress of the ice making process through the calculated slope (A). [S220]

Meanwhile, the control unit 17 determines whether the temperature of the ice tray 120 has reached the first set temperature t1. At this time, the first set temperature t1 may be -1 [deg.] C, for example, an arbitrary temperature lower than 0 [deg.] C at which icing starts.

That is, when the temperature of the ice tray 120 is lower than 0 ° C, which is the temperature at which the ice tray 120 is frozen, the icing can be completed within the set time T after the start of icing, that is, the start of the phase change.

However, in a state where the water supplied to the ice tray 120 is stabilized, even when the temperature has reached a lower temperature beyond the first set temperature T1, icing may not start and may enter the supercooled state.

The controller 17 determines whether the ice tray 120 reaches the first set temperature t1 to prevent the water supplied to the ice tray 120 from being maintained in a supercooled state. When the temperature of the ice tray 120 does not reach the first set temperature t1, the control unit 17 continuously calculates and stores the temperature gradient A of the ice tray 120 When the temperature of the ice tray 120 reaches the first preset temperature t1, the ice-making motor 111 is instructed to operate. [S230]

When the ice tray 120 reaches the first preset temperature t1, the controller 17 operates the ice-making motor 111. [ At this time, the ice-making motor 111 can be rotated at an angle significantly smaller than the rotation angle of the ice tray 120 in the ice-making step S3. In order to distinguish the operation of the ice-making motor 111 from the ice-making step S3, the ice-making motor 111 is operated when the ice tray 120 reaches the first set temperature t1 And the ice tray 120 is rotated in the ice making step S3 as ice-making rotation.

Since the ice tray 120 is rotated only so that the water supplied to the inside of the ice tray 120 can be rotated out of the stabilized state, the water can be released from the stabilized state even when the water tray 120 is rotated by about 3 to 7 degrees. Of course, the rotation angle of the ice tray 120 may be adjusted within a range in which the ice tray 120 does not overflow. The ice tray 120 may be rotated to be smaller than the rotation angle during the freezing operation.

The ice-making motor 111 may be rotated by an angle set by the ice-making rotation and then rotated back to an initial position to return the ice tray 120 to an initial state. The ice-making motor 111 may continuously perform the ice-making rotation for a plurality of times so that the water supplied to the ice tray 120 is reliably supercooled. [S240]

On the other hand, in the state where the supercooling angle is eliminated by the rotation of the ice-making motor 111, the icing immediately starts and the ice of the ice tray 120 can be made quickly. Then, the controller 17 determines whether the second set time T2 has elapsed after the rotation of the ice-making motor 111 to determine whether sufficient freezing is occurring.

The second set time T2 may be set to a temperature at which a sufficient temperature change can be sensed through the temperature sensor 123 since the ice tray 120 is sufficiently cooled. For example, the second set time T2 may be set to approximately one minute.

The control unit 17 waits while supplying cold air to the ice tray 120 until the second predetermined time T2 elapses after the ice-making motor 111 rotates. When the second preset time T2 elapses, the controller 17 stores the temperature of the ice tray 120. [S250]

When the second set time T2 elapses, the controller 17 stores the temperature measured by the temperature sensor 123. [ The control unit 17 calculates and stores the temperature change gradient B of the ice tray 120 through the measured temperature change. [S260]

The control unit 17 controls the temperature change gradient A of the ice tray 120 and the temperature of the ice tray 120 after the lapse of the second set time T2 before the ice- It is judged whether the error (absolute value of (AB) / A) between the change slopes B is larger than the set value.

In some cases, even if the ice-making motor 111 rotates, the ice-making speed is not sufficient or the phase change itself does not occur, so that the supercooling state may still be maintained. In this case, the error may be smaller than the set value.

In this case, it is determined that the supercooled state has not completely deviated from the supercooled state, and the control unit 17 proceeds to step S240 for operating the ice-making motor 111 again. [S270]

In addition, the control unit 17 may determine whether the temperature change gradient B of the ice tray 120 is greater than zero. If the temperature difference gradient B of the ice tray 120 is greater than 0 while the error is smaller than the predetermined value, Is less than 0, it is determined that the supercooling has not been solved, and the control unit proceeds to step S240 for operating the ice-making motor 111 again. [S280]

When the temperature of the ice tray 120 reaches the second predetermined temperature t2 or the ice-making completion time T is reached, the control unit 17 stops the ice- The blowing fan 16 may be continuously driven to continue the cooling so that the ice-making can proceed. When the temperature of the ice tray 120 reaches the second predetermined temperature t2 or reaches the ice-making completion time T, the controller 17 determines that ice-making is completed. [S290]

When the controller 17 determines that the ice making is completed, the controller 17 drives the ice making motor 111 and the ice making motor 111 performs the ice- So that the ice tray 120 is cooled.

When the ice tray 120 is completely removed from the ice tray 120, the ice-making motor 111 returns to the initial position and the ice-making operation is terminated.

Hereinafter, a state in which a normal ice-making operation is performed through the ice-making operation will be described.

FIG. 6 is a graph showing changes in tray temperature over time of the ice making operation of the refrigerator.

As shown in the figure, the ice making operation of the refrigerator 1 may consist entirely of the water supplying step S1, the ice making step S2, and the ice making step S3, Same as.

When the water supply step S1 is started, water is supplied by opening the water supply valve 150, and the temperature of the ice tray 120 is raised by the water supply until the water supply is completed.

When the ice tray 120 enters the ice making step S2 after the water supplying step S1, the temperature of the ice tray 120 is continuously lowered by the driving of the blowing fan 16. When the temperature of the ice tray 120 is lower than 0 ° C, icing starts. When icing occurs, the temperature change gradients A and B of the ice tray 120 are changed due to a phase change.

When the temperature of the ice tray 120 reaches the first set temperature t1, the ice tray 120 is rotated by a predetermined angle by operating the ice-making motor 111, And allows the stored water to escape from the stabilized state to facilitate freezing.

That is, even if the ice tray 120 does not undergo a freezing condition at a temperature of 0 ° C, when the first set temperature t1 reaches -1 ° C, for example, the ice tray 120 rotates to a supercooled state So that the ice can be released.

When the ice tray 120 starts to freeze, the temperature change of the ice tray 120 becomes more gentle and the temperature change gradient B of the ice tray 120 and the temperature change gradient B of the ice tray 120 The phase change state of the ice tray 120 immediately before the rotation of the ice tray 120 is confirmed. At this time, if it is determined that the water in the ice tray 120 is still in a supercooled state or the ice tray 120 is not sufficiently iced, the ice tray 120 may be further rotated.

The ice-making step S2 is terminated when the temperature of the ice tray 120 reaches the second predetermined temperature t2. In this case, The operation of the blowing fan 16 can be stopped.

At the end of the ice-making step S2, the ice-making motor 111 is driven and the ice-making step S3 is performed, and the ice-making operation is completed.

The time T for completion of the ice-making operation is approximately 37 minutes, and the time for the ice-making operation can be shortened.

On the other hand, even if the temperature of the ice tray 120 does not reach the second set temperature t2, if the [S270] or [S280] step is satisfied, the ice making operation reaches the set time of for example 40 minutes It is possible to perform the ice-making step S3 and finish the ice-making.

Claims (12)

A cabinet having a storage space opened and closed by a door;
An ice tray disposed in an area of the storage space and storing water supplied;
A blower fan for supplying cold air to the ice tray;
An ice-making motor coupled to the ice tray and rotating the ice tray for ice-making;
A temperature sensor provided in the ice tray and measuring a temperature of the ice tray;
And a controller for controlling the ice tray to rotate at a predetermined angle to accelerate ice formation when the temperature of the ice tray reaches a first set temperature,
Wherein the first set temperature is set to a temperature between 0 ° C and a second set temperature for judging completion of ice making.
The method according to claim 1,
Wherein,
Wherein the controller is configured to drive the ice-making motor so that the rotation angle of the ice tray rotated at the first set temperature is smaller than the rotation angle at the time of ice-making.
The method according to claim 1,
Wherein the ice tray is provided inside the cabinet.
The method according to claim 1,
Wherein the ice tray is provided on a rear surface of the refrigerator door.
A water supply step of supplying water to the ice tray for ice-making;
An ice making step of supplying cold air to the ice tray;
And an ice-making step for rotating the ice-making motor so that the ice tray is rotated to freeze the iced ice,
Wherein when the temperature of the ice tray reaches the first set temperature in the ice making step, the ice tray is rotated at a predetermined angle to accelerate icing,
Wherein the first set temperature is set to a temperature between 0 ° C and a second set temperature for judging completion of ice making.
6. The method of claim 5,
Wherein the rotation angle of the ice tray rotated at the first set temperature is smaller than the rotation angle of the ice tray.
6. The method of claim 5,
Wherein the rotation of the ice-making motor for accelerating freezing in the ice-making step is performed a plurality of times.
6. The method of claim 5,
In the ice-making step,
(A) of the ice tray before the temperature of the ice tray reaches the first set temperature,
(A) of the ice tray after the ice-making motor is rotated,
And determining an additional operation of the ice-making motor for accelerating freezing.
9. The method of claim 8,
Wherein the additional rotation of the ice-making motor is performed when an error between the tilt (A) and the tilt (B) is equal to or smaller than a set size.
10. The method of claim 9,
And the additional rotation of the ice-making motor is performed when the inclination (B) is smaller than zero.
6. The method of claim 5,
Wherein the ice-making step is performed when an error between the slope (A) and the slope (B) is equal to or larger than a predetermined size and the ice tray temperature reaches a second set temperature.
The method of claim 5,
Wherein when the error between the slope (A) and the slope (B) is equal to or larger than a set size and the ice-making step is continued for a set time or more, the ice-making step is performed.

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