KR20210005800A - Refrigerator and method for controlling the same - Google Patents

Abstract

According to the present invention, a refrigerator enables a heater positioned on one side of a first tray or a second tray to be turned on in at least a partial section while a cold air supply means supplies cold air to an ice-making cell to generate transparent ice by movement of bubbles molten in water inside the ice-making cell from an ice generation portion to the water of a liquid state after supplying the water to the ice-making cell as much as a first water supply amount. A control unit determined whether there is abnormal operation of the heater in an ice-making process and supplies the water to the ice-making cell as much as a second water supply amount less than the first water supply amount in a next water supply process when it is determined that the heater is abnormally operated.

Description

Refrigerator and method for controlling the same}

The present specification relates to a refrigerator and a control method thereof.

In general, refrigerators are home appliances that allow low-temperature storage of food in an internal storage space that is shielded by a door.

The refrigerator uses cold air to cool the inside of the storage space, so that stored foods can be stored in a refrigerated or frozen state.

Usually, an ice maker for making ice is provided in the refrigerator.

The ice maker generates ice by cooling water after receiving water supplied from a water supply source or a water tank in a tray.

In addition, the ice maker may ice the ice which has been de-iced in the ice tray using a heating method or a twisting method.

In this way, the ice maker, which is automatically watered and iced, is formed to open upwards and pumps the ice formed.

Ice made in an ice maker with such a structure has a flat surface such as a crescent shape or a cubic shape.

On the other hand, when the shape of the ice is formed in a spherical shape, it may be more convenient to use ice, and a different feeling of use may be provided to the user. In addition, it is possible to minimize the sticking of ice by minimizing the area in contact with each other even when the ice is stored.

An ice maker is disclosed in Korean Patent Publication No. 10-1850918 (hereinafter referred to as "priority document 1"), which is a prior document.

In the ice maker of Prior Document 1, a plurality of hemispherical upper cells are arranged, an upper tray including a pair of link guides extending upward from both sides, and a plurality of hemispherical lower cells are arranged, and the upper A lower tray rotatably connected to a tray, a rotation shaft connected to the rear end of the lower tray and the upper tray so that the lower tray rotates with respect to the upper tray, one end connected to the lower tray, and the other end A pair of links connected to the link guide unit; And an upper ejecting pin assembly connected to the pair of links, respectively, with both ends being fitted in the link guide part, and moving up and down together with the link.

In the case of Prior Document 1, a sphere-shaped ice can be generated by the hemispherical upper cell and the hemispherical lower cell, but since the ice is simultaneously generated in the upper and lower cells, air bubbles contained in water are completely discharged. There is a drawback that the ice formed by the air bubbles dispersed in the water is opaque.

An ice-making apparatus is disclosed in Japanese Unexamined Patent Application Publication No. Hei 9-269172 (hereinafter referred to as "priority document 2"), which is a prior document.

The ice-making apparatus of Prior Document 2 includes an ice-making dish and a heater that heats the bottom of water supplied to the ice-making dish.

In the case of the ice making apparatus of Prior Document 2, water on one side and the bottom of the ice making block is heated by a heater during the ice making process. Thus, solidification proceeds on the water surface, and convection occurs in the water, so that transparent ice can be produced.

As the growth of transparent ice progresses and the volume of water in the ice-making block decreases, the solidification rate gradually increases, and sufficient convection suitable for the solidification rate cannot occur.

Therefore, in the case of Prior Document 2, when approximately 2/3 of the water is solidified, the heating amount of the heater is increased to suppress an increase in the solidification rate.

However, according to Prior Document 2, since the heating amount of the heater is increased when the volume of water is simply reduced, it is difficult to generate ice having uniform transparency according to the shape of ice.

The present embodiment provides a refrigerator capable of generating ice having uniform transparency as a whole regardless of its shape, and a control method thereof.

In addition, the present embodiment provides a refrigerator capable of generating spherical ice and having uniform transparency for each unit height of the spherical ice, and a control method thereof.

In addition, in the present embodiment, the heating amount of the transparent ice heater and/or the cooling power of the cold air supply means are varied in response to the variable heat transfer amount between the water in the ice making cell and the cold air in the storage compartment, thereby generating ice with uniform transparency as a whole. It provides a refrigerator capable of and a control method thereof.

In addition, the present embodiment provides a refrigerator and a control method thereof in which ice is smoothed after ice making is completed by adjusting the amount of water supply in consideration of volume expansion of water when it is detected that the transparent ice heater is not operating normally.

In addition, the present embodiment provides a refrigerator and a control method thereof capable of preventing water from being present at a central portion of ice even when an ice-making speed is increased because a transparent ice heater does not operate normally.

In the refrigerator according to one aspect, after supplying water to the ice making cell by the amount of the first water supply, the control unit may generate transparent ice by moving bubbles dissolved in the water inside the ice making cell toward liquid water in the ice-forming part. The heater is turned on in at least a portion of the section while the cool air supply means supplies the cool air.

The control unit determines whether the heater is abnormally operating during the ice making process, and if it is determined that the heater is abnormally operating, the control unit supplies water to the ice making cell by a second water supply amount smaller than the first water supply amount in the next water supply process. Can be controlled.

In this embodiment, the controller may determine whether the heater is abnormally operated based on a time elapsed from the start of ice making until the temperature sensed by the second temperature sensor reaches the first reference temperature. have.

The controller may determine that the heater operates normally when the elapsed time from the start of ice making until the temperature detected by the second temperature sensor reaches the first reference temperature is longer than a set time.

The control unit may determine that the heater operates abnormally if the elapsed time from the start of ice making until the temperature detected by the second temperature sensor reaches the first reference temperature is shorter than a set time.

When the elapsed time is shorter than the set time, the control unit waits for the ice break until the waiting time after the point in time when the temperature sensed by the second temperature sensor reaches the first reference temperature reaches the standby reference time. Later, you can perform eaves.

In this embodiment, the first tray may form a part of an ice-making cell, which is a space in which water is phase-changed into ice by the cold air, and the second tray forms another part of the ice-making cell, and an ice-making process In may be in contact with the first tray, and may be spaced apart from the first tray during the eaves process.

The second tray may be connected to a driving unit to receive power from the driving unit.

By the operation of the driving unit, the second tray may move from a water supply position to an ice making position. In addition, the second tray may move from the ice making position to the ice making position by the operation of the driving unit.

Water supply of the ice making cell may be performed while the second tray is moved to the water supply position.

After the water supply is completed, the second tray may be moved to the ice making position. After the second tray is moved to the ice making position, the cold air supply means supplies cool air to the ice making cell.

When the ice making in the ice making cell is completed, the second tray may move in a forward direction to the ice making position to take out the ice from the ice making cell.

After the second tray is moved to the eaves position, it is moved to the water supply position in the reverse direction, and water supply may be started again.

When it is determined that the heater is operating abnormally, water is supplied to the ice making cell by the second water supply amount for the next ice making. Thereafter, the second tray may be moved to the ice making position, and the cool air supply means may supply cool air to the ice making cell.

When the temperature sensed by the second temperature sensor reaches a first reference temperature after starting the ice making, the controller may determine that the ice making has been completed.

When it is determined that the ice making has been completed, the control unit may determine whether the ice making time has passed the completion reference time. When the ice-making time does not elapse the completion reference time, the ice-making may be performed after waiting for the ice-making until the ice-making time elapses the completion reference time.

The controller may control one or more of the cooling power of the cooling air supply means and the heating amount of the heater to vary according to the mass per unit height of water in the ice making cell.

A refrigerator according to another aspect may include a controller capable of recognizing a selection of one of a transparent ice mode and a quick ice making mode.

When the transparent ice mode is selected, the controller may control water supply to the ice making cell as much as the first water supply amount during the water supply process. On the other hand, when the quick ice making mode is selected, the water supply may be controlled to supply water to the ice making cell by a second water supply amount smaller than the first water supply amount in the water supply process.

In the transparent ice mode, the control unit is supplying cold air so that bubbles dissolved in the water inside the ice making cell move toward liquid water in the ice-generating portion to generate transparent ice. The heater can be turned on in at least some sections.

The controller may control one or more of the cooling power of the cooling air supply means and the heating amount of the heater to vary according to the mass per unit height of water in the ice making cell.

In the transparent ice mode, the controller may determine whether the heater is normally operated. If it is determined that the heater is operating abnormally, the water supply may be controlled to supply the second water supply amount to the ice making cell in the next water supply process.

In the quick ice making mode, the controller may turn off the heater.

In the rapid ice making mode, when the temperature sensed by the second temperature sensor reaches a first reference temperature after starting the ice making, the controller may determine that the ice making has been completed.

When it is determined that the ice making has been completed, it may be determined whether the ice making time has passed the completion reference time.

When the ice-making time does not elapse the completion reference time, the controller may perform the ice-breaking after waiting for the ice-making time until the completion reference time has elapsed.

A method of controlling a refrigerator according to another aspect includes: a first tray accommodated in a storage room, a second tray forming an ice making cell together with the first tray, a driving unit for moving the second tray, and the first tray And a heater for supplying heat to one or more of the second trays.

The method of controlling the refrigerator may include: performing water supply of the ice making cell as much as a first water supply amount while the second tray is moved to a water supply position; Performing ice making by supplying cold air to the ice making cell by a cold air supply means after the second tray moves from the water supply position to the ice making position in a reverse direction after completion of water supply; Determining whether ice making is complete; And when the ice making is completed, moving the second tray from the ice making position to the ice making position in a forward direction.

The controller turns on the heater in at least some section of the ice making step so that the bubbles dissolved in the water inside the ice making cell move toward the liquid water in the ice making part to generate transparent ice. I can.

The controller may determine whether the heater is abnormally operated while the heater is turned on.

If it is determined that the heater is operating abnormally, the control unit may control the water supply to the ice-making cell by a second water supply amount smaller than the first water supply amount in a next water supply process.

The control unit may determine whether the heater is abnormally operated based on a time elapsed until the temperature sensed by a temperature sensor for sensing the temperature of the ice making cell reaches a first reference temperature after starting the ice making.

The controller may determine that the heater operates normally when an elapsed time from the start of ice making until the temperature detected by the temperature sensor reaches the first reference temperature is longer than a set time. On the other hand, if the elapsed time is shorter than the set time, it may be determined that the heater operates abnormally.

When the elapsed time is shorter than the set time, the control unit waits for the eaves until the waiting time after the point in time when the temperature sensed by the temperature sensor reaches the first reference temperature reaches the standby reference time, Eave can be performed.

According to the proposed invention, since the cooling air supply means turns on the heater in at least some section while supplying the cold air, the ice-making speed is delayed by the heat of the heater, so that bubbles dissolved in the water inside the ice-making cell are generated at the portion where ice is generated. Clear ice can be created by moving towards liquid water.

In particular, in the case of this embodiment, by controlling one or more of the cooling power of the cooling air supply means and the heating amount of the heater according to the mass per unit height of water in the ice making cell, the overall transparency is uniform regardless of the shape of the ice making cell. Can generate ice.

In addition, in the present embodiment, the heating amount of the transparent ice heater and/or the cooling power of the cold air supply means are varied in response to the variable heat transfer amount between the water in the ice making cell and the cold air in the storage compartment, thereby generating ice with uniform transparency as a whole. I can.

In addition, even if the transparent ice heater operates abnormally, it is possible to generate ice in a spherical shape or a shape close to a sphere by adjusting the water supply amount.

In addition, there is an advantage in that ice is prevented from being iced in a state in which water is present after the formation of ice is completed.

1 is a view showing a refrigerator according to an embodiment of the present invention.
2 is a perspective view showing an ice maker according to an embodiment of the present invention.
3 is a perspective view of the ice maker with the bracket removed from FIG. 2;
4 is an exploded perspective view of an ice maker according to an embodiment of the present invention.
5 is a cross-sectional view taken along AA of FIG. 3 for showing a second temperature sensor installed in the ice maker according to an embodiment of the present invention.
6 is a longitudinal cross-sectional view of an ice maker when a second tray according to an embodiment of the present invention is positioned at a water supply position.
7 is a control block diagram of a refrigerator according to an embodiment of the present invention.
8 and 9 are flowcharts illustrating a process of generating ice in an ice maker according to an embodiment of the present invention.
10 is a view for explaining a height reference according to a relative position of a transparent ice heater with respect to an ice making cell.
11 is a view for explaining the output of the transparent ice heater per unit height of water in the ice making cell.
12 is a view showing a state in which water supply is completed at a water supply position.
13 is a view showing a state in which ice is generated at an ice making position.
14 is a view showing a state in which the second tray and the first tray are separated from each other in an eaves process.
15 is a view showing a state in which the second tray has been moved to the moving position during the moving process.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

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

Referring to FIG. 1, a refrigerator according to an exemplary embodiment of the present invention may include a cabinet 14 including a storage compartment and a door for opening and closing the storage compartment.

The storage chamber may include a refrigerating chamber 18 and a freezing chamber 32. The refrigerating chamber 14 is disposed on the upper side and the freezing chamber 32 is disposed on the lower side, so that each storage compartment can be opened and closed individually by each door.

As another example, a freezing chamber may be disposed on the upper side and a refrigerating chamber may be disposed on the lower side. Alternatively, a freezing compartment may be disposed on one of the left and right sides, and a refrigerating compartment may be disposed on the other side.

In the freezing chamber 32, an upper space and a lower space may be separated from each other, and a drawer 40 capable of drawing in/out from the lower space may be provided in the lower space.

The door may include a plurality of doors 10, 20, and 30 for opening and closing the refrigerating chamber 18 and the freezing chamber 32.

The plurality of doors 10, 20, 30 may include some or all of the doors 10, 20 for opening and closing the storage chamber in a rotating manner, and the door 30 for opening and closing the storage chamber in a sliding manner.

The freezing chamber 32 may be provided to be separated into two spaces, even though it can be opened and closed by one door 30.

In the present embodiment, the freezing chamber 32 may be referred to as a first storage chamber, and the refrigerating chamber 18 may be referred to as a second storage chamber.

An ice maker 200 capable of manufacturing ice may be provided in the freezing chamber 32. The ice maker 200 may be located in the upper space of the freezing chamber 32, for example.

An ice bin 600 in which ice produced by the ice maker 200 is dropped and stored may be provided under the ice maker 200. The user may take out the ice bin 600 from the freezing chamber 32 and use the ice stored in the ice bin 600.

The ice bin 600 may be mounted on an upper side of a horizontal wall that divides the upper space and the lower space of the freezing chamber 32.

Although not shown, the cabinet 14 is provided with a duct for supplying cold air to the ice maker 200. The duct guides the cool air heat-exchanged with the refrigerant flowing through the evaporator toward the ice maker 200.

For example, the duct may be disposed at the rear of the cabinet 14 to discharge cool air toward the front of the cabinet 14. The ice maker 200 may be located in front of the duct.

Although not limited, the outlet of the duct may be provided in at least one of a rear wall and an upper wall of the freezing chamber 32.

Although it has been described above that the ice maker 200 is provided in the freezing compartment 32, the space in which the ice maker 200 can be located is not limited to the freezing compartment 32, and as long as cold air can be supplied, various The ice maker 200 may be located in the space.

2 is a perspective view showing an ice maker according to an embodiment of the present invention, FIG. 3 is a perspective view of the ice maker with the bracket removed in FIG. 2, and FIG. 4 is an exploded perspective view of the ice maker according to an embodiment of the present invention to be. 5 is a cross-sectional view taken along line A-A of FIG. 3 for showing a second temperature sensor installed in an ice maker according to an embodiment of the present invention.

6 is a longitudinal cross-sectional view of an ice maker when a second tray according to an embodiment of the present invention is positioned at a water supply position.

2 to 6, each component of the ice maker 200 is provided inside or outside the bracket 220, so that the ice maker 200 may constitute one assembly.

The bracket 220 may be installed on an upper wall of the freezing chamber 32, for example.

A water supply unit 240 may be installed above the inner surface of the bracket 220.

The water supply unit 240 is provided with openings at upper and lower sides, respectively, so that water supplied to the upper side of the water supply unit 240 may be guided to the lower side of the water supply unit 240.

The upper opening of the water supply unit 240 is larger than the lower opening, and may limit a discharge range of water guided downward through the water supply unit 240.

A water supply pipe through which water is supplied may be installed above the water supply unit 240.

Water supplied to the water supply unit 240 may be moved downward. The water supply unit 240 prevents water discharged from the water supply pipe from falling from a high position, thereby preventing water from splashing.

Since the water supply unit 240 is disposed below the water supply pipe, water is guided downward without splashing to the water supply unit 240, and even if it is moved downward by a lowered height, the amount of water splashing can be reduced.

The ice maker 200 may include an ice making cell 320a, which is a space in which water is transformed into ice by cold air.

The ice maker 200 includes a first tray 320 forming at least a part of a wall for providing the ice making cell 320a, and a first tray 320 forming at least another part of the wall for providing the ice making cell 320a. It may include a second tray 380.

Although not limited, the ice making cell 320a may include a first cell 320b and a second cell 320c.

The first tray 320 may define the first cell 320b, and the second tray 380 may define the second cell 320c.

The second tray 380 may be disposed to be movable relative to the first tray 320. The second tray 380 may perform linear motion or rotational motion.

Hereinafter, an example in which the second tray 380 rotates will be described.

For example, in the ice making process, the second tray 380 may move with respect to the first tray 320 so that the first tray 320 and the second tray 380 may contact each other.

When the first tray 320 and the second tray 380 contact each other, the complete ice making cell 320a may be defined.

On the other hand, the second tray 380 may move relative to the first tray 320 during the ice-making process after the ice making is completed, so that the second tray 380 may be spaced apart from the first tray 320.

In this embodiment, the first tray 320 and the second tray 380 may be arranged in a vertical direction while the ice making cell 320a is formed.

Accordingly, the first tray 320 may be referred to as an upper tray, and the second tray 380 may be referred to as a lower tray.

A plurality of ice making cells 320a may be defined by the first tray 320 and the second tray 380. In FIG. 4, as an example, three ice making cells 320a are formed.

When water is cooled by cold air while water is supplied to the ice-making cell 320a, ice having the same or similar shape as that of the ice-making cell 320a may be generated.

In this embodiment, for example, the ice making cell 320a may be formed in a spherical shape or a shape similar to a spherical shape.

In this case, the first cell 320b may be formed in a hemispherical shape or a shape similar to that of a hemisphere. In addition, the second cell 320c may be formed in a hemispherical shape or a shape similar to a hemisphere.

Of course, the ice making cell 320a may be formed in a rectangular parallelepiped shape or a polygonal shape.

The ice maker 200 may further include a first tray case 300 coupled to the first tray 320.

For example, the first tray case 300 may be coupled to an upper side of the first tray 320.

The first tray case 300 may be manufactured as a separate article from the bracket 220 and may be coupled to the bracket 220 or integrally formed with the bracket 220.

The ice maker 200 may further include a first heater case 280. The first heater case 280 may be provided with a heater 290 for ice breaking. The heater case 280 may be integrally formed with the first tray case 300 or may be formed separately.

The ice-breaking heater 290 may be disposed at a position adjacent to the first tray 320. The ice-breaking heater 290 may be, for example, a wire type heater.

For example, the ice-breaking heater 290 may be installed to contact the first tray 320 or may be disposed at a position spaced apart from the first tray 320 by a predetermined distance.

In either case, the ice-making heater 290 may supply heat to the first tray 320, and heat supplied to the first tray 320 may be transferred to the ice-making cell 320a.

The ice maker 200 may further include a first tray cover 340 positioned below the first tray 320.

The first tray cover 340 has an opening formed to correspond to the shape of the ice making cell 320a of the first tray 320, and thus may be coupled to the lower side of the first tray 320.

The first tray case 300 may be provided with a guide slot 302 inclined at an upper side and vertically extending at a lower side. The guide slot 302 may be provided in a member extending upward of the first tray case 300.

The guide protrusion 262 of the first pusher 260 to be described later may be inserted into the guide slot 302. Accordingly, the guide protrusion 262 may be guided along the guide slot 302.

The first pusher 260 may include at least one extension part 264. As an example, the first pusher 260 may include an extension part 264 provided in the same number as the number of ice-making cells 320a, but is not limited thereto.

The extension part 264 may push ice located in the ice making cell 320a during the ice making process. For example, the extension part 264 may pass through the first tray case 300 and be inserted into the ice making cell 320a.

Accordingly, the first tray case 300 may be provided with a hole 304 through which a portion of the first pusher 260 passes.

The guide protrusion 262 of the first pusher 260 may be coupled to the pusher link 500. At this time, the guide protrusion 262 may be rotatably coupled to the pusher link 500. Accordingly, when the pusher link 500 moves, the first pusher 260 may also move along the guide slot 302.

The ice maker 200 may further include a second tray case 400 coupled to the second tray 380.

The second tray case 400 may support the second tray 380 from a lower side of the second tray 380.

As an example, at least a portion of a wall forming the second cell 320c of the second tray 380 may be supported by the second tray case 400.

A spring 402 may be connected to one side of the second tray case 400. The spring 402 may provide an elastic force to the second tray case 400 so that the second tray 380 may maintain a contact state with the first tray 320.

The ice maker 200 may further include a second tray cover 360.

The second tray 380 may include a peripheral wall 382 surrounding a part of the first tray 320 in a state in contact with the first tray 320.

The second tray cover 360 may surround the peripheral wall 382.

The ice maker 200 may further include a second heater case 420. A transparent ice heater 430 may be installed in the second heater case 420.

The transparent ice heater 430 will be described in detail. In this embodiment, the controller 800 may supply heat to the ice-making cell 320a by the transparent ice heater 430 in at least a portion of the period during which cold air is supplied to the ice-making cell 320a so that transparent ice may be generated. To be able to control.

Due to the heat of the transparent ice heater 430, the ice making speed is delayed so that the bubbles dissolved in the water inside the ice making cell 320a can move from the ice-generating portion to the liquid water. In 200), transparent ice may be generated. That is, air bubbles dissolved in water may be induced to escape to the outside of the ice-making cell 320a or to be collected in a predetermined position in the ice-making cell 320a.

On the other hand, when the cold air supply means 900 to be described later supplies cold air to the ice-making cell 320a, when the ice-forming speed is high, bubbles dissolved in the water inside the ice-making cell 320a are formed at the portion where ice is generated. The transparency of ice generated by freezing without moving toward liquid water may be low.

On the other hand, when the cold air supply means 900 supplies cold air to the ice making cell 320a, if the rate at which ice is generated is slow, the above problem may be solved and the transparency of the generated ice may increase, but the ice making time may take a long time. Problems can arise.

Therefore, to reduce the delay of the ice making time and increase the transparency of the generated ice, the transparent ice heater 430 may provide heat to the ice making cell 320a locally. It can be placed on one side.

Meanwhile, when the transparent ice heater 430 is disposed on one side of the ice making cell 320a, it is possible to reduce the heat from the transparent ice heater 430 easily transferred to the other side of the ice making cell 320a. At least one of the first tray 320 and the second tray 380 may be made of a material having a lower thermal conductivity than metal.

Meanwhile, at least one of the first tray 320 and the second tray 380 may be a resin including plastic so that ice attached to the trays 320 and 380 is separated well during the ice breaking process.

Meanwhile, at least one of the first tray 320 and the second tray 380 may be made of a flexible or flexible material so that the tray deformed by the pushers 260 and 540 during the eaves process can be easily restored to its original shape. have.

The transparent ice heater 430 may be disposed at a position adjacent to the second tray 380. The transparent ice heater 430 may be, for example, a wire type heater.

For example, the transparent ice heater 430 may be installed to contact the second tray 380 or may be disposed at a position spaced apart from the second tray 380 by a predetermined distance.

As another example, the second heater case 420 may not be separately provided, and the toming-bing heater 430 may be installed in the second tray case 400.

In any case, the transparent ice heater 430 may supply heat to the second tray 380, and heat supplied to the second tray 380 may be transferred to the ice making cell 320a.

The ice maker 200 may further include a driving unit 480 providing a driving force. The second tray 380 may move relative to the first tray 320 by receiving the driving force of the driving unit 480.

A through hole 282 may be formed in an extension portion 281 extending downward on one side of the first tray case 300.

A through hole 404 may be formed in the extension part 403 extending to one side of the second tray case 400.

The ice maker 200 may further include a shaft 440 passing through the through holes 282 and 404 together.

Rotating arms 460 may be provided at both ends of the shaft 440, respectively. The shaft 440 may be rotated by receiving a rotational force from the driving unit 480.

One end of the rotation arm 460 may be connected to one end of the spring 402 so that when the spring 402 is tensioned, the position of the rotation arm 460 may be moved to an initial value by a restoring force.

The driving unit 480 may include a motor and a plurality of gears.

A full ice detection lever 520 may be connected to the driving unit 480. The ice detection lever 520 may be rotated by the rotational force provided by the driving unit 480.

The full ice detection lever 520 may have an overall'U' shape. For example, the ice detection lever 520 includes a first portion 521 and a pair of second portions 522 extending in a direction crossing the first portion 521 at both ends of the first portion 521. ) Can be included.

One of the pair of second portions 522 may be coupled to the driving unit 480, and the other may be coupled to the bracket 220 or the first tray case 300.

The ice detection lever 520 may detect ice stored in the ice bin 600 while being rotated.

The driving unit 480 may further include a cam rotated by receiving rotational power of the motor.

The ice maker 200 may further include a sensor that detects rotation of the cam.

As an example, the cam may be provided with a magnet, and the sensor may be a Hall sensor for sensing magnetism of the magnet during rotation of the cam. Depending on whether the sensor detects a magnet, the sensor may output a first signal and a second signal, which are different outputs. One of the first signal and the second signal may be a high signal, and the other may be a low signal.

The controller 800, which will be described later, may determine the location of the second tray 380 based on the type and pattern of the signal output from the sensor. That is, since the second tray 380 and the cam are rotated by the motor, the position of the second tray 380 may be indirectly determined based on a detection signal of a magnet provided in the cam.

For example, a water supply location and an ice making location to be described later may be classified and determined based on a signal output from the sensor.

The ice maker 200 may further include a second pusher 540.

The second pusher 540 may be installed on the bracket 220.

The second pusher 540 may include at least one extension part 544. As an example, the second pusher 540 may include an extension 544 provided in the same number as the number of ice-making cells 320a, but is not limited thereto.

The extension part 544 may push ice located in the ice making cell 320a. For example, the extension part 544 may pass through the second tray case 400 and come into contact with the second tray 380 forming the ice making cell 320a, and the contacted second tray ( 380) can be pressurized.

Accordingly, a hole 422 through which a part of the second pusher 540 passes may be provided in the second tray case 400.

The first tray case 300 may be rotatably coupled to each other with respect to the second tray case 400 and the shaft 440, and thus may be disposed so that the angle changes around the shaft 440.

In this embodiment, the second tray 380 may be formed of a non-metal material.

For example, when the second tray 380 is pressed by the second pusher 540, the second tray 380 may be formed of a flexible material that can be deformed.

Although not limited, the second tray 380 may be formed of a silicon material.

Accordingly, while the second tray 380 is pressed by the second pusher 540, the second tray 380 is deformed so that the pressing force of the second pusher 540 may be transmitted to ice. Ice and the second tray 380 may be separated by the pressing force of the second pusher 540.

When the second tray 380 is formed of a non-metallic material and a flexible or soft material, the bonding force or adhesion between ice and the second tray 380 may be reduced, so that ice can be easily separated from the second tray 380 have.

In addition, when the second tray 380 is formed of a non-metallic material and a flexible or soft material, after the shape of the second tray 380 is deformed by the second pusher 540, the second pusher 540 When the pressing force of) is removed, the second tray 380 can be easily restored to its original shape.

Meanwhile, the first tray 320 may be formed of a metal material. In this case, since the bonding force or separation between the first tray 320 and ice is strong, the ice maker 200 of the present embodiment may include at least one of the ice-breaking heater 290 and the first pusher 260. I can.

As another example, the first tray 320 may be formed of a non-metal material.

When the first tray 320 is formed of a non-metal material, the ice maker 200 may include only one of the ice-ice heater 290 and the first pusher 260.

Alternatively, the ice maker 200 may not include the ice-breaking heater 290 and the first pusher 260.

Although not limited, the first tray 320 may be formed of a silicon material.

That is, the first tray 320 and the second tray 380 may be formed of the same material.

When the first tray 320 and the second tray 380 are formed of the same material, the first tray 320 and the second tray 380 may be formed of the same material, so that the sealing performance is maintained at a contact portion between the first tray 320 and the second tray 380. The hardness of the first tray 320 and the hardness of the second tray 380 may be different.

In the present embodiment, the second tray 380 is pressed by the second pusher 540 to deform the shape, so that the second tray 380 can be easily deformed, the second tray 380 The hardness of may be lower than that of the first tray 320.

Meanwhile, referring to FIG. 5, the ice maker 200 may further include a second temperature sensor (or tray temperature sensor) 700 for sensing the temperature of the ice making cell 320a.

The second temperature sensor 700 may detect the temperature of water or ice of the ice making cell 320a.

The second temperature sensor 700 is disposed adjacent to the first tray 320 and detects the temperature of the first tray 320, thereby indirectly measuring the temperature of water or ice of the ice making cell 320a. Can be detected. In this embodiment, the temperature of water or ice of the ice-making cell 320a may be referred to as an internal temperature of the ice-making cell 320a.

The second temperature sensor 700 may be installed in the first tray case 300.

In this case, the second temperature sensor 700 may contact the first tray 320 or may be spaced apart from the first tray 320 by a predetermined distance. Alternatively, the second temperature sensor 700 may be installed on the first tray 320 to contact the first tray 320.

Of course, when the second temperature sensor 700 is disposed so as to pass through the first tray 320, the temperature of water or ice of the ice making cell 320a may be directly sensed.

Meanwhile, a part of the ice-breaking heater 290 may be positioned higher than the second temperature sensor 700, and may be spaced apart from the second temperature sensor 700.

The wire 701 connected to the second temperature sensor 700 may be guided above the first tray case 300.

Referring to FIG. 6, the ice maker 200 of the present embodiment may be designed so that the position of the second tray 380 is different from a water supply position and an ice making position.

For example, the second tray 380 may be formed along a second cell wall 381 defining a second cell 320c among the ice making cells 320a, and along an outer edge of the second cell wall 381. It may include an extending perimeter wall 382.

The second cell wall 381 may include an upper surface 381a. In this specification, the upper surface 381a of the second cell wall 381 may be referred to as the upper surface 381a of the second tray 380.

The upper surface 381a of the second cell wall 381 may be positioned lower than the upper end of the peripheral wall 381.

The first tray 320 may include a first cell wall 321a defining a first cell 320b among the ice making cells 320a.

The first cell wall 321a may include a straight portion 321b and a curved portion 321c. The curved portion 321c may be formed in an arc shape having a center of the shaft 440 as a radius of curvature.

Accordingly, the circumferential wall 381 may also include a straight portion and a curved portion corresponding to the straight portion 321b and the curved portion 321c.

The first cell wall 321a may include a lower surface 321d. In the present specification, it may be referred to that the lower surface 321b of the first cell wall 321a is the lower surface 321b of the first tray 320.

The lower surface 321d of the first cell wall 321a may contact the upper surface 381a of the second cell wall 381a.

For example, in the water supply position as shown in FIG. 6, at least a portion of the lower surface 321d of the first cell wall 321a and the upper surface 381a of the second cell wall 381 may be spaced apart.

In FIG. 6, for example, it is shown that the lower surface 321d of the first cell wall 321a and all of the upper surface 381a of the second cell wall 381 are spaced apart from each other.

Accordingly, the upper surface 381a of the second cell wall 381 may be inclined to form a predetermined angle with the lower surface 321d of the first cell wall 321a.

Although not limited, in the water supply position, the lower surface 321d of the first cell wall 321a may be substantially horizontal, and the upper surface 381a of the second cell wall 381 is the first cell wall ( It may be disposed so as to be inclined with respect to the lower surface 321d of the first cell wall 321a under the 321a).

In the state shown in FIG. 6, the peripheral wall 382 may surround the first cell wall 321a. In addition, an upper end of the peripheral wall 382 may be positioned higher than a lower surface 321d of the first cell wall 321a.

Meanwhile, in the ice making position (see FIG. 12 ), the upper surface 381a of the second cell wall 381 may contact at least a portion of the lower surface 321d of the first cell wall 321a.

The angle formed by the upper surface 381a of the second tray 380 and the lower surface 321d of the first tray 320 at the ice making position is equal to the upper surface 382a of the second tray 380 and the second It is smaller than the angle formed by the lower surface 321d of the 1 tray 320.

In the ice making position, the upper surface 381a of the second cell wall 381 may contact all of the lower surface 321d of the first cell wall 321a.

In the ice making position, an upper surface 381a of the second cell wall 381 and a lower surface 321d of the first cell wall 321a may be disposed to be substantially horizontal.

In this embodiment, the reason why the water supply position of the second tray 380 and the ice making position are different is that when the ice maker 200 includes a plurality of ice making cells 320a, communication between the ice making cells 320a is This is to ensure that water is uniformly distributed to the plurality of ice making cells 320a without forming a water passage for the first tray 320 and/or the second tray 380.

If the ice maker 200 includes the plurality of ice making cells 320a, when a water passage is formed in the first tray 320 and/or the second tray 380, the ice maker 200 The water supplied to is distributed to the plurality of ice making cells 320a along the water passage.

However, when the water is distributed to the plurality of ice making cells 320a, water exists in the water passage, and when ice is generated in this state, ice generated in the ice making cell 320a is generated in the water passage part. Connected by ice.

In this case, there is a possibility that the ice will stick to each other even after the ice is completed, and even if the ice is separated from each other, some of the ice will contain ice generated in the water passage, so the shape of the ice is the shape of the ice making cell. There is a problem different from that.

However, as in the present embodiment, when the second tray 380 is spaced apart from the first tray 320 at the water supply position, the water dropped to the second tray 380 is the second tray. It may be uniformly distributed to the plurality of second cells 320c of 380.

For example, the first tray 320 may include a communication hole 321e. When the first tray 320 includes one first cell 320b, the first tray 320 may include one communication hole 321e.

When the first tray 320 includes a plurality of first cells 320b, the first tray 320 may include a plurality of communication holes 321e.

The water supply unit 240 may supply water to one communication hole 321e among the plurality of communication holes 321e.

In this case, the water supplied through the one communication hole 321e passes through the first tray 320 and then falls into the second tray 380.

During the water supply process, water may fall into any one second cell 320c of the plurality of second cells 320c of the second tray 380. Water supplied to one of the second cells 320c overflows from the one of the second cells 320c.

In the present embodiment, since the upper surface 381a of the second tray 380 is spaced apart from the lower surface 321d of the first tray 320, the water overflowing from the one second cell 320c is 2 It moves to another adjacent second cell 320c along the upper surface 381a of the tray 380.

Accordingly, water may be filled in the plurality of second cells 320c of the second tray 380.

In addition, when water supply is completed, a part of the water supplied is filled in the second cell 320c, and another part of the water supplied is filled in the space between the first tray 320 and the second tray 380. I can.

In the water supply position, depending on the volume of the ice making cell 320a, water when water supply is completed is located only in the space between the first tray 320 and the second tray 380, or the first tray 320 and It may be located in a space between the second trays 380 and in the first tray 320 (see FIG. 12).

When the second tray 380 moves from the water supply position to the ice making position, water in the space between the first tray 320 and the second tray 380 is uniformly distributed to the plurality of first cells 320b. Can be distributed.

Meanwhile, when a water passage is formed in the first tray 320 and/or the second tray 380, ice generated in the ice making cell 320a is also generated in the water passage portion.

In this case, in order to generate transparent ice, the control unit of the refrigerator performs at least one of the cooling power of the cold air supply unit 900 and the heating amount of the transparent ice heater 430 according to the mass per unit height of water in the ice making cell 320a. When this variable is controlled, at least one of the cooling power of the cold air supply means 900 and the heating amount of the transparent ice heater 430 in the portion where the water passage is formed is controlled to rapidly vary several times or more.

This is because the mass per unit height of water increases several times or more at a portion where the water passage is formed. In this case, reliability problems of parts may occur, and expensive parts having a large width of the maximum and minimum outputs can be used, which may be disadvantageous in terms of power consumption and cost of the parts. As a result, the present invention may require a technique related to the above-described ice making position to generate transparent ice.

7 is a control block diagram of a refrigerator according to an embodiment of the present invention.

Referring to FIG. 7, the refrigerator of the present embodiment may further include a cold air supply means 900 for supplying cold air to the freezing chamber 32 (or ice making cell). The cold air supply means 900 may supply cold air to the freezing chamber 32 by using a refrigerant cycle.

As an example, the cold air supply means 900 may include a compressor for compressing a refrigerant. The temperature of the cold air supplied to the freezing chamber 32 may vary according to the output (or frequency) of the compressor.

Alternatively, the cold air supply means 900 may include a fan for blowing air to the evaporator. The amount of cool air supplied to the freezing chamber 32 may vary according to the output (or rotational speed) of the fan.

Alternatively, the cool air supply means 900 may include a refrigerant valve that controls an amount of refrigerant flowing through the refrigerant cycle.

The amount of refrigerant flowing through the refrigerant cycle is varied by adjusting the opening degree by the refrigerant valve, and accordingly, the temperature of the cold air supplied to the freezing chamber 32 may vary.

Accordingly, in this embodiment, the cold air supply means 900 may include at least one of the compressor, fan, and refrigerant valve.

The refrigerator according to the present embodiment may further include a controller 800 that controls the cold air supply means 900.

In addition, the refrigerator may further include a water supply valve 242 for controlling an amount of water supplied through the water supply unit 240.

The controller 800 may control some or all of the ice ice heater 290, the transparent ice heater 430, the driving unit 480, the cold air supply means 900, and the water supply valve 242. .

In this embodiment, when the ice maker 200 includes both the ice-breaking heater 290 and the transparent ice heater 430, the output of the ice-breaking heater 290 and the transparent ice heater 430 The output of may be different.

When the outputs of the ice-breaking heater 290 and the transparent ice-heating heater 430 are different, the output terminal of the ice-breaking heater 290 and the output terminal of the transparent ice heater 430 may be formed in different shapes. , Incorrect connection of the two output terminals can be prevented.

Although not limited, the output of the ice ice heater 290 may be set to be greater than the output of the transparent ice heater 430. Accordingly, ice may be quickly separated from the first tray 320 by the ice-breaking heater 290.

In the present embodiment, when the ice-breaking heater 290 is not provided, the transparent ice heater 430 is disposed adjacent to the second tray 380 described above, or the first tray 320 and It can be placed in adjacent locations.

The refrigerator may further include a first temperature sensor 33 (or an interior temperature sensor) that senses the temperature of the freezing compartment 32.

The controller 800 may control the cold air supply means 900 based on the temperature sensed by the first temperature sensor 33.

In addition, the controller 800 may determine whether ice making is completed based on the temperature sensed by the second temperature sensor 700.

The refrigerator may further include a memory 940 in which a water supply amount is stored in advance. In the present embodiment, the memory 940 may store a first water supply amount when the transparent ice heater 430 operates normally and a second water supply amount when the transparent ice heater 430 does not operate normally.

8 and 9 are flowcharts illustrating a process of generating ice in an ice maker according to an embodiment of the present invention.

FIG. 10 is a view for explaining a height standard according to a relative position of a transparent ice heater with respect to an ice making cell, and FIG. 11 is a view for explaining an output of a transparent ice heater per unit height of water in an ice making cell.

12 is a view showing a state in which the water supply is completed at the water supply position, FIG. 13 is a view showing the state that ice is generated at the ice making position, and FIG. 14 is a state in which the second tray is separated from the first tray during the ice-making FIG. 15 is a view showing a state in which the second tray is moved to the eaves position during the eaves process.

6 to 15, in order to generate ice in the ice maker 200, the controller 800 moves the second tray 380 to a water supply position (S1).

In the present specification, a direction in which the second tray 380 moves from the ice making position of FIG. 12 to the ice making position of FIG. 14 may be referred to as a forward movement (or forward rotation).

On the other hand, a direction moving from the eaves position of FIG. 14 to the water supply position of FIG. 6 may be referred to as a reverse movement (or reverse rotation).

The movement of the water supply position of the second tray 380 is detected by a sensor, and when it is sensed that the second tray 380 has moved to the water supply position, the control unit 800 stops the drive unit 480.

Water supply is started while the second tray 380 is moved to the water supply position (S2).

Hereinafter, it will be described by way of example that the transparent ice heater 430 normally operates in the previous ice making process.

When the transparent ice heater 430 is normally operated during the previous ice making process, water is supplied to the ice making cell 320a as much as a first water supply amount.

For water supply, the controller 800 turns on the water supply valve 242 and, when it is determined that water equal to the first water supply amount has been supplied, may turn off the water supply valve 242.

For example, in the process of supplying water, a pulse is output from a flow sensor (not shown), and when the output pulse reaches a first reference pulse corresponding to the first water supply amount, it is determined that water equal to the first supply amount Can be.

After the water supply is completed, the control unit 800 controls the driving unit 480 to move the second tray 380 to the ice making position (S3).

For example, the control unit 800 may control the driving unit 480 so that the second tray 380 moves in a reverse direction from a water supply position.

When the second tray 380 is moved in the reverse direction, the upper surface 381a of the second tray 380 becomes close to the lower surface 321e of the first tray 320.

Then, the water between the upper surface 381a of the second tray 380 and the lower surface 321e of the first tray 320 is divided and distributed into each of the plurality of second cells 320c.

When the upper surface 381a of the second tray 380 and the lower surface 321e of the first tray 320 are completely in close contact with each other, water is filled in the first cell 320b.

The movement of the ice making position of the second tray 380 is detected by a sensor, and when it is sensed that the second tray 380 has moved to the ice making position, the control unit 800 stops the driving unit 480.

Ice-making starts while the second tray 380 is moved to the ice-making position (S4).

For example, when the second tray 380 reaches the ice making position, ice making may start. Alternatively, when the second tray 380 reaches the ice-making position and the water supply time elapses, ice-making may start.

When ice making starts, the controller 800 may control the cold air supply means 900 so that cold air is supplied to the ice making cell 320a.

After the ice making starts, the controller 800 may control the transparent ice heater 430 to be turned on in at least a portion of the section while the cold air supply means 900 supplies cold air to the ice making cell 320a. have.

When the transparent ice heater 430 is turned on, since heat from the transparent ice heater 430 is transferred to the ice making cell 320a, the ice making speed in the ice making cell 320a may be delayed.

As in the present embodiment, by delaying the ice-making speed so that bubbles dissolved in the water inside the ice-making cell 320a can move from the portion where ice is generated to the liquid water by the heat of the transparent ice heater 430 , Transparent ice may be generated in the ice maker 200.

During the ice making process, the controller 800 may determine whether the on condition of the transparent ice heater 430 is satisfied (S5).

In this embodiment, the transparent ice heater 430 is not turned on immediately after ice making starts, and the transparent ice heater 430 may be turned on only when the on condition of the transparent ice heater 430 is satisfied (S6).

In general, water supplied to the ice making cell 320a may be water at room temperature or water at a temperature lower than room temperature. The temperature of the water supplied in this way is higher than the freezing point of the water.

Therefore, after the water supply, when the temperature of the water decreases due to the cold air and then reaches the freezing point of the water, the water changes to ice.

In the case of this embodiment, the transparent ice heater 430 may not be turned on before the water changes into ice.

If the transparent ice heater 430 is turned on before the temperature of the water supplied to the ice making cell 320a reaches the freezing point, the speed at which the water temperature reaches the freezing point by the heat of the transparent ice heater 430 becomes slow. As a result, the start of ice formation is delayed.

The transparency of ice may vary depending on the presence or absence of bubbles in the portion where ice is generated after the ice starts to be generated.If heat is supplied to the ice making cell 320a before ice is generated, the above It can be seen that the transparent ice heater 430 operates.

Accordingly, according to the present embodiment, when the transparent ice heater 430 is turned on after the on condition of the transparent ice heater 430 is satisfied, power is consumed due to unnecessary operation of the transparent ice heater 430 Can be prevented.

Of course, even if the transparent ice heater 430 is turned on immediately after the start of ice making, the transparency is not affected, and thus the transparent ice heater 430 may be turned on after the start of ice making.

In this embodiment, the controller 800 may determine that the on condition of the transparent ice heater 430 is satisfied when a predetermined time elapses from a set specific time point. The specific time point may be set to at least one of the time points before the transparent ice heater 430 is turned on. For example, the specific time point may be set as a time point at which the cold air supply means 900 starts to supply cooling power for ice making, a time point at which the second tray 380 reaches the ice making position, a time point at which water supply is completed, etc. .

Alternatively, the controller 800 may determine that the on condition of the transparent ice heater 430 is satisfied when the temperature sensed by the second temperature sensor 700 reaches the on reference temperature.

For example, the on-reference temperature may be a temperature for determining that water has started to freeze at the top side (the communication hole side) of the ice making cell 320a.

When a part of water is frozen in the ice-making cell 320a, the temperature of ice in the ice-making cell 320a is sub-zero.

The temperature of the first tray 320 may be higher than the temperature of ice in the ice making cell 320a.

Of course, although water is present in the ice-making cell 320a, the temperature sensed by the second temperature sensor 700 may be a sub-zero temperature after the ice-making cell 320a starts to generate ice.

Accordingly, in order to determine that ice has started to be generated in the ice making cell 320a based on the temperature sensed by the second temperature sensor 700, the on-reference temperature may be set to a temperature below zero. .

That is, when the temperature sensed by the second temperature sensor 700 reaches the on reference temperature, the on reference temperature is a sub-zero temperature, so the temperature of the ice in the ice making cell 320a is sub-zero and the on-reference temperature Will be lower than the temperature. Accordingly, it may be indirectly determined that ice is generated in the ice making cell 320a.

In this way, when the transparent ice heater 430 is turned on, heat from the transparent ice heater 430 is transferred into the ice making cell 320a.

As in the present embodiment, when the second tray 380 is located under the first tray 320 and the transparent ice heater 430 is disposed to supply heat to the second tray 380 In the ice making cell 320a, ice may start to be generated from the upper side.

In this embodiment, since ice is generated in the ice-making cell 320a from the top, air bubbles move downward toward the liquid water in the portion where ice is generated in the ice-making cell 320a.

Since the density of water is greater than that of ice, water or air bubbles may convective in the ice-making cell 320a, and air bubbles may move toward the transparent ice heater 430.

In this embodiment, the mass (or volume) per unit height of water in the ice-making cell 320a may be the same or different depending on the shape of the ice-making cell 320a.

For example, when the ice-making cell 320a is a rectangular parallelepiped, the mass (or volume) per unit height of water in the ice-making cell 320a is the same.

On the other hand, when the ice making cell 320a has a shape such as a spherical shape, an inverted triangle, a crescent shape, or the like, the mass (or volume) per unit height of water is different.

If, assuming that the cooling power of the cold air supply means 900 is constant, if the heating amount of the transparent ice heater 430 is the same, the ice per unit height is different because the mass per unit height of water is different in the ice making cell 320a. The rate at which it is generated may vary.

For example, when the mass per unit height of water is small, the rate of ice formation is high, whereas when the mass per unit height of water is large, the rate of ice formation is slow.

As a result, the rate at which ice is generated per unit height of water may not be constant, so the transparency of ice may vary for each unit height. In particular, when the rate of formation of ice is high, bubbles may not move from ice to water, so that ice may contain bubbles, and thus transparency may be low.

That is, the smaller the deviation in the rate of ice formation per unit height of water, the smaller the variation in transparency per unit height of the generated ice.

Accordingly, in this embodiment, the control unit 800, the cooling power of the cold air supply means 900 and/or the heating amount of the transparent ice heater 430 according to the mass per unit height of water of the ice making cell 320a It can be controlled to be variable.

In the present specification, the cooling power of the cooling air supply means 900 may include one or more of variable output of the compressor, variable output of the fan, and variable opening degree of the refrigerant valve.

In addition, in the present specification, the variable heating amount of the transparent ice heater 430 may mean varying the output of the transparent ice heater 430 or varying the duty of the transparent ice heater 430 .

At this time, the duty of the transparent ice heater 430 means a ratio of the on time to the on time and off time of the transparent ice heater 430 in one cycle, or the on time of the transparent ice heater 430 in one cycle. It may mean a ratio of off time to time and off time.

In this specification, the standard of the unit height of water in the ice-making cell 320a may be different according to a relative position between the ice-making cell 320a and the transparent ice heater 430.

For example, as shown in FIG. 10A, the transparent ice heater 430 may be arranged to have the same height at the bottom of the ice making cell 320a.

In this case, a line connecting the transparent ice heater 430 is a horizontal line, and a line extending in a vertical direction from the horizontal line is a reference of the unit height of water of the ice making cell 320a.

In the case of (a) of FIG. 10, ice is generated and grown from the top to the bottom of the ice making cell 320a.

On the other hand, as shown in (b) of FIG. 10, the transparent ice heater 430 may be arranged to have a different height at the bottom of the ice making cell 320a.

In this case, since heat is supplied to the ice-making cell 320a at different heights of the ice-making cell 320a, ice is generated in a pattern different from that of FIG. 10A.

For example, in the case of (b) of FIG. 10, ice may be generated at a position spaced from the top to the left of the ice making cell 320a, and ice may grow downward to the right where the transparent ice heater 430 is located. .

Accordingly, in the case of (b) of FIG. 10, a line (reference line) perpendicular to a line connecting two points of the transparent ice heater 430 is a reference of the unit height of water of the ice making cell 320a. The reference line of FIG. 10B is inclined by a predetermined angle from the vertical line.

FIG. 11 shows the division of the water unit height and the output amount of the transparent ice heater per unit height when the transparent ice heater is disposed as shown in FIG. 10A.

Hereinafter, an example of controlling the output of the transparent ice heater so that the rate of ice generation is constant for each unit height of water will be described.

Referring to FIG. 11, when the ice-making cell 320a is formed in a spherical shape, for example, the mass per unit height of water in the ice-making cell 320a increases from top to bottom, then becomes maximum, and then decreases again. .

As an example, the water (or ice-making cell itself) in the spherical ice-making cell 320a having a diameter of 50 mm is divided into 9 sections (section A through I) with a height of 6 mm (unit height). At this time, it should be noted that there is no limit to the size of the unit height and the number of divided sections.

When the water in the ice making cell 320a is divided by the unit height, the height of each divided section is the same in section A to section H, and section I is lower than the rest of the section. Of course, depending on the diameter of the ice making cell 320a and the number of divided sections, the unit heights of all divided sections may be the same.

Among the many sections, section E is the section in which the mass of each unit height is the maximum. For example, in the section in which the mass of each unit height of water is the maximum, when the ice-making cell 320a has a spherical shape, the diameter of the ice-making cell 320a, the horizontal cross-sectional area or the circumference of the ice-making cell 320a is maximum. Includes phosphorus part.

As described above, assuming that the cooling power of the cold air supply means 900 is constant and the output of the transparent ice heater 430 is constant, the ice generation rate in section E is the slowest, and section A and I The ice formation rate in the section is the fastest.

In this case, there is a problem in that the ice generation rate is different for each unit height, so that the transparency of ice varies according to the unit height, and in a specific section, the ice generation rate is too fast, so that transparency including bubbles is lowered.

Therefore, in the present embodiment, the output of the transparent ice heater 430 so that the speed at which ice is generated for each unit height is the same or similar while allowing the air bubbles to move toward the water in the ice generating process. Can be controlled.

Specifically, since the mass of the E section is the largest, the output W5 of the transparent ice heater 430 in the E section may be set to the minimum.

Since the mass of section D is smaller than that of section E, the rate of ice formation increases as the mass decreases, so it is necessary to delay the rate of ice formation.

Accordingly, the output W4 of the toming ice heater 430 in the section D may be set higher than the output W5 of the transparent ice heater 430 in the section E.

For the same reason, since the mass of section C is smaller than the mass of section D, the output (W3) of the transparent ice heater 430 of section C is set higher than the output (W4) of the transparent ice heater 430 of section D. I can.

In addition, since the mass of the section B is smaller than the mass of the section C, the output W2 of the transparent ice heater 430 of the section B may be set higher than the output W3 of the transparent ice heater 430 of the section C. .

In addition, since the mass of section A is smaller than the mass of section B, the output W1 of the transparent ice heater 430 in section A may be set higher than the output W2 of the transparent ice heater 430 in section B. .

For the same reason, since the mass per unit height decreases from the E section to the lower side, the output of the transparent ice heater 430 may increase from the E section to the lower side (see W6, W7, W8, and W9). .

Accordingly, looking at the output change pattern of the transparent ice heater 430, after the transparent ice heater 430 is turned on, the output of the transparent ice heater 430 may be gradually reduced from the first section to the middle section.

The output of the transparent ice heater 430 becomes the minimum in the intermediate section in which the mass per unit height of water is the minimum.

From the next section of the intermediate section, the output of the transparent ice heater 430 may be increased stepwise again.

By controlling the output of the transparent ice heater 430, the transparency of ice becomes uniform for each unit height, and bubbles are collected in the lowermost section. Thus, when viewed as a whole, air bubbles may collect in localized portions and the rest of the ice may become entirely transparent.

As described above, even if the ice-making cell 320a is not in a spherical shape, transparent ice is generated when the output of the transparent ice heater 430 is varied according to the mass of each unit height of water in the ice-making cell 320a. can do.

The heating amount of the transparent ice heater 430 when the mass per unit height of water is large is smaller than the heating amount of the transparent ice heater 430 when the mass per unit height of water is small.

For example, while maintaining the same cooling power of the cold air supply means 900, the heating amount of the transparent ice heater 430 may be varied in inverse proportion to the mass per unit height of water.

In addition, transparent ice may be generated by varying the cooling power of the cold air supply means 900 according to the mass of each unit height of water.

For example, when the mass of water per unit height is large, the cooling power of the cool air supply means 900 may be increased, and when the mass per unit height is small, the cooling power of the cold air supply unit 900 may be decreased.

For example, while maintaining a constant heating amount of the transparent ice heater 430, the cooling power of the cold air supply means 900 may be varied in proportion to the mass per unit height of water.

Looking at the cooling power variable pattern of the cold air supply means 900 in the case of generating spherical ice, the cooling power of the cold air supply means 900 may be gradually increased from the first section to the middle section during the ice making process.

The cooling power of the cold air supply means 900 becomes maximum in the middle section in which the mass of water per unit height is the minimum.

In addition, from the next section of the intermediate section, the cooling power of the cold air supply means 900 may be gradually decreased.

Alternatively, transparent ice may be generated by varying the cooling power of the cold air supply means 900 and the heating amount of the transparent ice heater 430 according to the mass of each unit height of water.

For example, the cooling power of the cold air supply means 900 may be varied in proportion to the mass per unit height of water, and the heating amount of the transparent ice heater 430 may be varied in inverse proportion to the mass per unit height of water.

As in the present embodiment, when one or more of the cooling power of the cold air supply means 900 and the heating amount of the transparent ice heater 430 are controlled according to the mass of each unit height of water, the rate of ice generation per unit height of water is substantially The same or may be maintained within a predetermined range.

Meanwhile, the control unit 800 may determine whether ice making is complete based on the temperature sensed by the second temperature sensor 700 (S8).

For example, when the temperature sensed by the second temperature sensor 700 reaches a first reference temperature, the controller 800 may determine that ice making is complete.

When it is determined that the temperature sensed by the second temperature sensor 700 has reached the first reference temperature, the control unit 800 determines that the ice making time (the elapsed time from the ice making start point to the ice making completion point) is a set time. It can be determined whether it has elapsed (S9).

Alternatively, it is not divided into step S9 and step S9, and the control unit 800 sets the elapsed time from the start of ice making until the temperature sensed by the second temperature sensor 700 reaches the first reference temperature. It can be determined whether the time has elapsed.

Regardless of the operation of the transparent ice heater 430, when the temperature sensed by the second temperature sensor 700 reaches the first reference temperature, ice is entirely generated on the surface at least in contact with the ice making cell 320a. May be in the state.

The ice making time until the temperature sensed by the second temperature sensor 700 reaches the first reference temperature while the transparent ice heater 430 is turned off may be referred to as a first time (a).

The ice making time until the temperature sensed by the second temperature sensor 700 reaches the first reference temperature in a state in which the transparent ice heater 430 is turned on and operates normally may be referred to as a second time (b). have.

When the transparent ice heater 430 is turned on, the ice-making speed may be delayed, so that the ice-making time is lengthened, while when the transparent ice heater 430 is turned off, the ice-making speed is increased.

Therefore, the second time (b) is longer than the first time (a).

Since the ice making time differs depending on whether the transparent ice heater 430 is turned on or off (or whether it is normally operated), in the present embodiment, by determining whether the ice making time has passed a set time, the transparent ice heater ( It can be determined whether or not 430) operates normally.

In this case, the set time may be determined between the first time (a) and the second time (b).

For example, after determining completion of ice making, when it is determined that the ice making time has passed the set time (if the ice making time is greater than or equal to the set time), it may be determined that the transparent ice heater 430 operates normally.

On the other hand, after the completion of ice making, when it is determined that the ice making time has not passed the set time (if the ice making time is less than the set time), it may be determined that the transparent ice heater 430 operates abnormally.

When the transparent ice heater 430 operates abnormally, the transparent ice heater 430 is maintained in an off state due to a disconnection of the transparent ice heater 430, or the transparent ice heater 430 It is the case that it cannot operate with normal output in the ON state.

If it is determined in step S9 that the ice making time has passed the set time, the controller 800 determines that the transparent ice heater 430 operates normally, and the controller 800 determines that the transparent ice The heater 430 may be turned off (S10).

In the present embodiment, since the distance between the second temperature sensor 700 and each ice making cell 320a is different, in order to determine that ice generation has been completed in all ice making cells 320a, the controller 800, After a certain time elapses from the point when the transparent ice heater 430 is turned off, or when the temperature sensed by the second temperature sensor 700 reaches a second reference temperature lower than the first reference temperature, the ice ice may start. .

Of course, when the transparent ice heater 430 is turned off, it is also possible to start ice ice immediately.

When the ice making is completed, the controller 800 operates at least one of the ice ice heater 290 and the transparent ice heater 430 for ice ice removal (S11).

When at least one of the ice ice heater 290 and the transparent ice heater 430 is turned on, the heat of the heaters 290 and 430 is transferred to at least one of the first tray 320 and the second tray 380. The ice may be transferred and separated from one or more surfaces (inner surfaces) of the first tray 320 and the second tray 380.

In addition, heat from the heaters 290 and 430 is transferred to a contact surface between the first tray 320 and the second tray 380, so that the lower surface 321d of the first tray 320 and the second tray ( It is in a state that can be separated between the upper surfaces 381a of 380.

When at least one of the ice-breaking heater 290 and the transparent ice-ice heater 430 is operated for a set time, or when the temperature sensed by the second temperature sensor 700 is greater than or equal to the off-reference temperature, the controller 800 Turning off the on heaters 290 and 430 (S11).

Although not limited, the off reference temperature may be set as the temperature of the image.

The control unit 800 operates the driving unit 480 so that the second tray 380 moves in a forward direction (S12).

As shown in FIG. 13, when the second tray 380 is moved in the forward direction, the second tray 380 is spaced apart from the first tray 320.

Meanwhile, the moving force of the second tray 380 is transmitted to the first pusher 260 by the pusher link 500. Then, the first pusher 260 descends along the guide slot 302, so that the extension part 264 passes through the communication hole 321e, and presses the ice in the ice making cell 320a. do.

In the present embodiment, in the ice breaking process, ice may be separated from the first tray 320 before the extension part 264 presses the ice. That is, ice may be separated from the surface of the first tray 320 by the heat of the heated heater.

In this case, the ice may move together with the second tray 380 while being supported by the second tray 380.

As another example, even if the heat of the heater is applied to the first tray 320, there may be a case where ice does not separate from the surface of the first tray 320.

Accordingly, when the second tray 380 moves in the forward direction, there is a possibility that ice may be separated from the second tray 380 in a state in which the ice is in close contact with the first tray 320.

In this state, in the process of moving the second tray 380, the extension part 264 passing through the communication hole 320e presses the ice in close contact with the first tray 320, so that the ice It may be separated from the first tray 320.

The ice separated from the first tray 320 may be supported again by the second tray 380.

When ice moves together with the second tray 380 while being supported by the second tray 380, the ice may be caused by its own weight even if no external force is applied to the second tray 380. It can be separated from the tray 250.

If, in the process of moving the second tray 380, even if ice does not fall from the second tray 380 due to its own weight, the second tray 380 is moved by the second pusher 540 as shown in FIG. 14. When is pressurized, ice may be separated from the second tray 380 and may fall downward.

Specifically, as shown in FIG. 14, while the second tray 380 is moved, the second tray 380 comes into contact with the extension 544 of the second pusher 540.

When the second tray 380 is continuously moved in the forward direction, the extension part 544 presses the second tray 380 to deform the second tray 380, and the extension part ( The pressing force 544 is transmitted to the ice so that the ice may be separated from the surface of the second tray 380.

Ice separated from the surface of the second tray 380 may fall downward and be stored in the ice bin 600.

In this embodiment, as shown in FIG. 15, a position in which the second tray 380 is deformed by being pressed by the second pusher 540 may be referred to as an eave position.

Meanwhile, while the second tray 380 moves from the ice making position to the ice ice position, whether the ice bin 600 is full may be detected.

As an example, when the ice-cold detection lever 520 is rotated together with the second tray 380 and the ice-cold ice detection lever 520 interferes with the rotation of the ice-cold ice detection lever 520 , It may be determined that the ice bean 600 is in a full ice state. On the other hand, if the rotation of the ice-cold detection lever 520 is not interfered with by ice while the ice-cold detection lever 520 is rotated, it may be determined that the ice bin 600 is not in a full ice state.

After the ice is separated from the second tray 380, the control unit 800 controls the driving unit 480 to move the second tray 380 in the reverse direction (S13).

Then, the second tray 380 is moved from the moving position toward the water supply position (S1).

When the second tray 380 moves to the water supply position in FIG. 6, the control unit 800 stops the driving unit 480.

If the second tray 380 is spaced apart from the extension part 544 while the second tray 380 is moved in the reverse direction, the deformed second tray 380 may be restored to its original shape. have.

In the process of moving the second tray 380 in the reverse direction, the moving force of the second tray 380 is transmitted to the first pusher 260 by the pusher link 500, and the first pusher 260 Rises, and the extension part 264 is removed from the ice making cell 320a.

Meanwhile, as a result of the determination in step S9, if it is determined that the ice making time has not passed the set time, the control unit 800 sets the water supply amount as the second water supply amount (S21).

In this embodiment, the second water supply amount is smaller than the first water supply amount.

The controller 800 waits for eaves until the elapsed time after the determination of completion of the ice making reaches a standby reference time (S22).

When the ice making is completed before the ice making time passes the set time, the transparent ice heater 430 does not operate normally.

In this case, the temperature sensed by the second temperature sensor 700 reaches the first reference temperature before the water is transformed into ice as a whole.

For example, when the ice making cell 320a has a spherical shape, ice may be generated in a spherical shape, but water may exist inside the ice. Ice containing such water is iced, and when a user uses the iced ice, it may cause emotional dissatisfaction.

Therefore, when it is determined that the transparent ice heater 430 is abnormally operated, the control unit 800 determines the waiting time after the determination of the completion of ice making so that the ice in the ice making cell 320a is completely frozen. Wait until elapsed without performing eving.

When the waiting time after the determination of completion of ice making has passed the waiting reference time, the control unit 800 may perform the ice making (S23).

As another example, after determining that the ice making is complete, the controller 800 may wait until the ice making time passes the set time, and when the ice making time passes the set time, the controller 800 may perform the ice making.

The step (S23) of performing the ice break may include a step (S12) of operating the heater for ice breaking (290) and rotating the second tray (380) in a forward direction for the ice break (S12).

Then, the control unit 800 causes the second tray 380 to be moved to the water supply position (S24).

Water supply is started while the second tray 380 is moved to the water supply position, as long as full ice is not detected during the process of ice-bing.

In this embodiment, after the abnormal operation of the transparent ice heater 430 is detected, water is supplied as much as the second water supply amount (S25).

For water supply, the controller 800 turns on the water supply valve 242 and, when it is determined that water equal to the second water supply amount has been supplied, may turn off the water supply valve 242.

For example, in the process of supplying water, a pulse is output from a flow sensor (not shown), and when the output pulse reaches a second reference pulse corresponding to the second water supply amount, water equal to the second water supply amount is supplied. Can be judged.

After the second tray 380 is moved to the ice-making position (S26), ice-making starts (S27).

In this embodiment, the communication hole 321e is located at the top side 320a of the ice making cell 320a, and when water is supplied to the ice making cell 320a as much as the first water supply amount, the ice making cell 320a ) Of the water is located lower than the communication hole (321e).

The height (or water level) of the water in the ice-making cell 320a when water is supplied to the ice-making cell 320a by the amount of the first water supply is determined in consideration of the expansion force of water during a phase change of water into ice.

If water is supplied to a level higher than the communication hole 321e, after the ice making is completed, the ice becomes a spherical shape with a protrusion formed on the upper side, so that ice is not smooth.

In addition, since the sphere-shaped ice includes the protrusion on the upper side after the ice break is completed, it may cause a user's emotional dissatisfaction.

On the contrary, when water is supplied at a significantly lower height than the communication hole 321e (when water is supplied in an amount smaller than the first water supply), the ice after deicing becomes close to the shape of a hemisphere, and the ice making speed is fast. There is a disadvantage that the ice becomes opaque.

Therefore, it is preferable that the height (or water level) of water when water is supplied to the ice making cell 320a as much as the first water supply amount is set to be lower than the communication hole 321e and close to the communication hole 321e. .

In this way, when the transparent ice heater 430 operates normally in a state in which water equal to the first water supply amount is supplied, heat is supplied to the lower side of the ice making cell 320a, so that the uppermost side of the ice making cell 320a From, ice starts to form.

That is, ice starts to be generated in a portion close to the communication hole 321e and grows downward.

The expansion force of water not only acts as a portion of the generated ice, but also acts as the first tray 320 and the second tray 380 positioned lower than the communication hole 321e.

When each of the trays 320 and 380 is formed of a flexible material, since the trays 320 and 380 substantially absorb most of the expansion force, the volume expands evenly as a whole. Accordingly, after the ice making is completed, the ice becomes the same as or almost similar to the ice making cell 320a.

On the other hand, when the transparent ice heater 430 does not operate normally in a state where water equal to the first water supply amount is supplied, heat is not supplied to the lower side of the ice making cell 320a or the supplied heat is small, so that the ice making cell The ice starts to freeze on the lower side of (320a).

In this case, the expansion force of water not only acts as the trays 320 and 380, but also acts toward the communication hole 321e.

Since the communication hole 321e is open, water moves to a position higher than the communication hole 321e due to the volume expansion of water, and in this state, the water may phase change into ice.

Even if water starts to freeze at the communication hole 321e, the expansion force acting toward the communication hole 321e is greater than when the transparent ice heater 430 operates normally, so a position higher than that of the communication hole 321e Water becomes mobile.

When ice making is completed in this state, after the ice making is completed, the shape of the ice becomes a spherical shape with protrusions formed on the upper side, so that ice is not smooth, and after the ice making is completed, the spherical ice contains protrusions on the upper side. Can cause emotional dissatisfaction.

Accordingly, in the present embodiment, when the transparent ice heater 430 operates abnormally, water is supplied to the ice making cell 320a by a second water supply amount smaller than the first water supply amount in consideration of the expansion power of water. Although not limited, the second water supply amount may be set within a range of 85% to 95% of the first water supply amount in consideration of the expansion ratio of water.

Even if an amount of water smaller than the first water supply amount is supplied to the ice-making cell 320a, ice may be generated in the same or similar shape as a spherical shape by expansion of the water.

Meanwhile, the controller 800 may determine whether ice making is completed after the start of ice making (S28).

For example, when the temperature sensed by the second temperature sensor 700 reaches a first reference temperature, the controller 800 may determine that ice making is complete.

As a result of the determination in step S28, if it is determined that the ice-making has been completed, the control unit 800 may determine whether the ice-making time has passed the completion reference time (S29).

As the amount of water supplied to the ice-making cell 320a decreases and the amount of heat supplied from the transparent ice heater 430 decreases, the ice-making speed increases.

In the present embodiment, in a state in which the transparent ice heater 430 does not operate normally, the water supply amount is also smaller than that when the transparent ice heater 430 operates normally, so that the ice making speed is increased.

That is, after the start of ice making, the time when the temperature sensed by the second temperature sensor 700 reaches the first reference temperature is short.

Accordingly, ice may be entirely generated on the surface in contact with the ice making cell 320a, but water may exist inside the ice.

Therefore, when the temperature sensed by the second temperature sensor 700 reaches the first reference temperature after the start of ice making, the ice making process is not started immediately, and when the ice making time passes the completion reference time, the ice making process is performed. Can be (S23).

That is, according to the present embodiment, even after it is determined that the ice making is completed, the ice may be started after waiting for ice so that the water in the ice may be completely frozen.

According to this embodiment, even if the transparent ice heater operates abnormally, it is possible to generate ice in a spherical shape or a shape close to a sphere by adjusting the water supply amount.

In addition, there is an advantage in that ice is prevented from being iced in a state in which water is present after the formation of ice is completed.

Meanwhile, in the case of the present embodiment, since the transparent ice heater is operated to generate transparent ice during the ice making process, the ice making speed is slower than when the transparent ice heater is not operated.

In some cases, a user may want to quickly acquire ice even if it is not transparent ice.

Accordingly, in the present embodiment, a transparent ice mode for operating the transparent ice heater or a quick ice making mode in which the transparent ice heater is not operated may be selected using an input unit not shown or a button provided in the ice maker.

The controller 800 may recognize selection of one of the transparent ice mode and the rapid ice making mode.

If the transparent ice mode is selected, the first water supply amount is set, and water may be supplied to the ice making cell 320a as much as the first water supply amount.

The control unit 800 includes at least a portion of the cold air supply means supplying cold air so that transparent ice can be generated by moving bubbles dissolved in water inside the ice-making cell toward liquid water from a portion where ice is generated. The transparent ice heater 430 may be turned on in a section. In addition, the controller 800 may control one or more of the cooling power of the cooling air supply means and the heating amount of the heater to vary according to the mass per unit height of water in the ice making cell. The variable control of the cooling power of the cold air supply means 900 or the control of the heating amount of the transparent ice heater 430 are the same as described above.

On the other hand, when the quick ice making mode is selected, the second water supply amount is set, and water equal to the second water supply amount may be supplied to the ice making cell 320a.

In the quick ice making mode, the controller 800 may turn off the transparent ice heater 430.

Of course, even when the transparent ice mode is selected, if it is determined that the transparent ice heater 430 does not operate normally, water may be supplied to the ice making cell 320a equal to the second water supply amount.

Claims (18)

A storage room in which food is stored;
Cold air supply means for supplying cold air to the storage chamber;
A first temperature sensor for sensing a temperature in the storage chamber;
A first tray forming a part of an ice making cell, which is a space in which water is phase-changed into ice by the cold air;
A second tray that forms another part of the ice-making cell and is connected to a driving unit so that it may contact the first tray during an ice-making process and spaced apart from the first tray in an ice-making process;
A water supply unit for supplying water to the ice making cell;
A second temperature sensor for sensing the temperature of water or ice in the ice making cell;
A heater positioned adjacent to at least one of the first tray and the second tray; And
And a control unit for controlling the heater and the driving unit,
The control unit controls the cold air supply means to supply cold air to the ice-making cell after moving the second tray to the ice-making position after the water supply to the ice-making cell is completed,
The control unit controls the second tray to move in a forward direction to an ice-making position and then in a reverse direction to take out ice from the ice-making cell after the generation of ice in the ice-making cell is completed,
The control unit starts water supply after the second tray is moved to the water supply position in the reverse direction after the eaves are completed,
The control unit may be configured such that bubbles dissolved in the water inside the ice making cell move from the portion where ice is generated to the liquid water to generate transparent ice. Let the heater turn on,
The control unit determines whether the heater is abnormally operating during the ice making process, and if it is determined that the heater is abnormally operating, the control unit supplies water to the ice making cell by a second water supply amount smaller than the first water supply amount in a next water supply process. Refrigerator. The method of claim 1,
The controller determines whether or not the heater is abnormally operated based on an elapsed time from the start of ice making until the temperature detected by the second temperature sensor reaches a first reference temperature. The method of claim 2,
The control unit determines that the heater operates normally when an elapsed time from the start of ice making until the temperature detected by the second temperature sensor reaches the first reference temperature is longer than a set time, and performs ice-making. The method of claim 2,
The control unit determines that the heater operates abnormally when an elapsed time from the start of ice making until the temperature detected by the second temperature sensor reaches the first reference temperature is shorter than a set time. The method of claim 4,
When the elapsed time from the start of ice making until the temperature sensed by the second temperature sensor reaches the first reference temperature is shorter than a set time,
A refrigerator configured to perform eaves after waiting for eaves until a waiting time after a point in time when the temperature sensed by the second temperature sensor reaches the first reference temperature reaches a standby reference time. The method of claim 1,
The control unit controls the second tray to move to the ice-making position after water is supplied to the ice-making cell by the amount of the second water supply, and the cold air supply means to supply cold air to the ice-making cell,
When the temperature detected by the second temperature sensor reaches a first reference temperature after starting ice-making, the refrigerator determines that the ice-making has been completed. The method of claim 6,
When it is determined that the ice making is completed, the control unit determines whether the ice making time has passed the completion reference time,
When the ice making time does not elapse the completion reference time, the refrigerator performs ice saving after waiting for the ice making until the ice making time passes the completion reference time. The method of claim 1,
Wherein the controller controls at least one of a cooling power of the cooling air supply means and a heating amount of the heater to vary according to a mass per unit height of water in the ice making cell. A storage room in which food is stored;
Cold air supply means for supplying cold air to the storage chamber;
A first temperature sensor for sensing a temperature in the storage chamber;
A first tray forming a part of an ice making cell, which is a space in which water is phase-changed into ice by the cold air;
A second tray that forms another part of the ice-making cell and is connected to a driving unit so that it may contact the first tray during an ice-making process and spaced apart from the first tray in an ice-making process;
A water supply unit for supplying water to the ice making cell;
A second temperature sensor for sensing the temperature of water or ice in the ice making cell;
A heater positioned adjacent to at least one of the first tray and the second tray; And
And a control unit for controlling the heater and the driving unit,
The control unit controls the cold air supply means to supply cold air to the ice-making cell after the second tray is moved to the ice-making position after the water supply to the ice-making cell is completed,
The control unit may recognize selection of any one of a transparent ice mode and a quick ice making mode,
When the transparent ice mode is selected, the controller controls water supply to the ice making cell by the amount of the first water supply during the water supply process,
When the quick ice making mode is selected, a refrigerator for controlling water supply to the ice making cell by a second water supply amount smaller than the first water supply amount during a water supply process. The method of claim 9,
In the transparent ice mode, the control unit is supplying cold air so that bubbles dissolved in the water inside the ice making cell move toward liquid water in the ice-generating portion to generate transparent ice. A refrigerator configured to turn on the heater in at least some sections. The method of claim 10,
Wherein the controller controls at least one of a cooling power of the cooling air supply means and a heating amount of the heater to vary according to a mass per unit height of water in the ice making cell. The method of claim 10,
In the transparent ice mode, the controller determines whether the heater operates normally, and when it is determined that the heater operates abnormally, the refrigerator controls water supply to be supplied to the ice making cell by the second water supply amount in the next water supply process. . The method of claim 10,
In the quick ice making mode, the controller turns off the heater. The method of claim 10,
In the quick ice making mode, the controller determines that ice making is complete when the temperature sensed by the second temperature sensor reaches a first reference temperature after starting ice making,
When it is determined that the ice making has been completed, it is determined whether the ice making time has passed the completion reference time,
When the ice making time does not elapse the completion reference time, the refrigerator performs ice saving after waiting for the ice making until the ice making time passes the completion reference time. A first tray accommodated in the storage compartment, a second tray forming an ice making cell together with the first tray, a driving unit for moving the second tray, and at least one of the first tray and the second tray In the control method of a refrigerator including a heater for supply,
Performing water supply of the ice making cell as much as a first water supply amount while the second tray is moved to a water supply position;
Performing ice making by supplying cold air to the ice making cell by a cold air supply means after the second tray moves from the water supply position to the ice making position in a reverse direction after completion of water supply;
Determining whether ice making is complete; And
When the ice making is completed, the second tray is moved from the ice making position to the ice making position in a forward direction,
The controller turns on the heater in at least some section of the ice making step so that the bubbles dissolved in the water inside the ice making cell move toward the liquid water in the ice making part to generate transparent ice. ,
The control unit determines whether or not the heater is abnormally operated while the heater is turned on, and if it is determined that the heater is abnormally operated, the ice-making cell is transferred to the ice making cell by a second water supply amount less than the first water supply amount in the next water supply process A method for controlling a refrigerator, characterized in that water is supplied. The method of claim 15,
The control unit controls the refrigerator to determine whether the heater is abnormally operated based on an elapsed time until the temperature detected by a temperature sensor for sensing the temperature of the ice making cell reaches a first reference temperature after starting ice making. Way. The method of claim 16,
The controller determines that the heater operates normally when the elapsed time from the start of ice making until the temperature detected by the temperature sensor reaches the first reference temperature is longer than a set time,
If the elapsed time is shorter than a set time, the control method of the refrigerator determining that the heater is operating abnormally. The method of claim 17,
The control unit, when the elapsed time is shorter than the set time,
A method of controlling a refrigerator for performing ice-breaking after waiting for ice-breaking until a waiting time after a point in time when the temperature sensed by the temperature sensor reaches the first reference temperature reaches a waiting reference time.

Images