KR20210005789A - Refrigerator and method for controlling the same - Google Patents

Abstract

According to the present invention, a refrigerator comprises: a storage chamber storing food; a cold air supply means for supplying cold air to the storage chamber; a first tray forming a part of an ice-making cell which is a space where water changes its phase into ice by the cold air; a second tray forming another part of the ice-making cell, which is able to come in contact with the first tray in the ice-making process and to be connected to a driving unit to be apart from the first tray in the ice-moving process; a heater which is placed adjacent to at least one of the first tray and the second tray; a sensor for determining the position of the second tray in the process of moving the second tray; and a control unit which controls the heater and the driving unit. At the point of time when the initializing operation of the second tray starts, if a second signal is outputted from the sensor, the control unit controls to move the second tray in the reverse direction for A seconds and then move the second tray in the normal direction for B seconds. After the second tray is moved for B seconds in the normal direction, when a first signal is outputted from the sensor, the control unit controls to move the second tray in the normal direction until the output from the sensor is changed into the second signal, and the control unit recognizes the position of the second tray at the point of time when the output of the sensor is changed into the second signal as the position for supplying water. The present invention aims to provide a refrigerator and the control method thereof, which are able to make ice with a uniform transparency.

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 capable of accurately moving the second tray to the water supply position even if the water supply position and the ice making position of the second tray are set to different positions, even if the refrigerator is turned on after being turned off, and a control method thereof.

In addition, the present embodiment provides a refrigerator and a control method thereof in which damage to a driving unit is prevented while the second tray is moved to a water supply position.

In addition, this embodiment prevents the ice in the ice making cell from falling into the ice bin while the second tray is moved to the water supply position when the refrigerator is turned on after being turned off while ice is present in the ice making cell. It provides a refrigerator and a control method thereof.

A refrigerator according to an aspect includes a first tray forming a part of an ice-making cell, which is a space in which water is phase-changed into ice by cold air, and another part of the ice-making cell, and may be in contact with the first tray during an ice-making process. The ice making process may include a second tray connected to a driving unit to be spaced apart from the first tray, and a heater for supplying heat to the ice making cell.

In the present embodiment, in the refrigerator, the cold air supply means supplies cold air to the ice-making cell so that bubbles dissolved in water inside the ice-making cell move toward liquid water from the portion where ice is generated to generate transparent ice. A heater located at one side of the first tray or the second tray is turned on in at least some section.

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 is 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.

The refrigerator may further include a sensor for determining the position of the second tray in the process of moving the second tray.

When the second signal is output from the sensor when the initial operation of the second tray starts, the control unit moves the second tray in the reverse direction by A seconds and then moves the second tray by B seconds in the forward direction. Can be controlled.

After the second tray moves in the forward direction for B seconds and moves, if the first signal is output from the sensor, the control unit controls the second tray until the output from the sensor is changed to the second signal. It can be controlled to move in the direction.

When the output of the sensor is changed to the second signal, the control unit may recognize a location where the second tray is located as a water supply location.

The start time of the initializing operation may include at least one of a time when the abnormal mode in which power applied to the refrigerator is cut off, a time when the cut off power is applied again, and a time when the mode of the refrigerator is switched to a service mode have.

When the first signal is output from the sensor when the initial operation of the second tray starts, the controller moves the second tray in the reverse direction until the second signal is output from the sensor. Can be controlled.

When the refrigerator is turned on, the controller turns on the heater, and when the temperature detected by the second temperature sensor reaches a set temperature, after turning off the heater, based on a signal output from the sensor, The driving unit may be controlled so that the second tray moves to the water supply position.

The refrigerator may further include a heater for ice removal to supply heat to the ice making cell.

When the refrigerator is turned on, the controller turns on the ice-breaking heater, and when the temperature detected by the second temperature sensor reaches a set temperature, the signal output from the sensor after turning off the ice-breaking heater Based on, the driving unit may be controlled so that the second tray moves to the water supply position.

The B second may be set smaller than the A second.

When the output of the sensor is changed to the second signal, the control unit moves the second tray forward for an additional C seconds at the time when the output of the sensor is changed to the second signal, and then The second tray may be stopped after moving the second tray in the reverse direction until the first signal is output.

When the output of the sensor is changed to the second signal, the controller may stop the second tray.

The refrigerator may further include cold air supply means for supplying cold air to the storage chamber.

In the present embodiment, 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.

For example, the control unit may maintain the same cooling power of the cooling air supply means, and the heater so that the heating amount of the heater when the mass per unit height of water is large is smaller than the heating amount of the heater when the mass per unit height of water is small. The heating amount of can be controlled.

In another example, the controller may maintain the same heating amount of the heater, and the cooling power of the cold air supplying means when the mass per unit height of water is large is less than that of the cold air supplying means when the mass per unit height of water is small. The cooling power of the cooling air supply means can be controlled so as to be large.

In this embodiment, the control unit is configured to maintain the ice-making speed of the water inside the ice-making cell within a predetermined range lower than the ice-making speed when ice-making is performed with the heater turned off. The heating amount of the heater may be increased when the heat transfer amount between the water of the water is increased, and the heating amount of the heater may be decreased when the heat transfer amount between the cold air in the storage compartment and the water of the ice making cell decreases.

A method of controlling a refrigerator according to another aspect includes: a first tray accommodated in a storage compartment, 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 at least one of the second trays, and a sensor for checking a position of the second tray.

The method of controlling the refrigerator may include performing water supply of the ice making cell while the second tray is moved to a water supply position; Performing ice making after the second tray is moved from the water supply position to the ice making position in the reverse direction after the water supply is completed; And after the ice making is completed, moving the second tray from the ice making position to the ice making position in a forward direction.

The heater may be turned on in at least a portion of the step in which the ice making is performed so that bubbles dissolved in the water inside the ice making cell move toward the liquid water in the portion where ice is generated to generate transparent ice.

The second signal may be output from the sensor at the ice making position of the second tray, and the first signal may be output while the second tray moves from the ice making position to the water supply position.

When the signal output from the sensor changes from the first signal to the second signal, the position of the second tray may be set as a water supply position.

In this embodiment, when the refrigerator is turned on after being turned off, the control unit may control the driving unit to move the second tray to the water supply position based on a signal output from the sensor.

As an example, when the second signal is output from the sensor when the refrigerator is turned on, the controller may move the second tray in a set pattern.

Moving the second tray in a set pattern means moving the second tray in the reverse direction by A seconds and then moving the second tray by B seconds less than A seconds in the forward direction.

After the second tray is moved in a set pattern, when the first signal is output from the sensor, the control unit may move the second tray in the forward direction until the second signal is output from the sensor. .

The control unit further moves the second tray forward for C seconds from the time when the second signal is output from the sensor, and then moves the second tray in the reverse direction until the first signal is output from the sensor. After that, the second tray can be stopped.

After the second tray is moved to a set pattern, if the first signal is output from the sensor, the control unit moves the second tray in the forward direction until the second signal is output from the sensor, and then the The second tray can be stopped.

After the second tray is moved in a set pattern, when the second signal is output from the sensor, the control unit may move the second tray in the reverse direction until the first signal is output from the sensor.

When the first signal is output from the sensor, the control unit moves the second tray in the reverse direction until the second signal is output from the sensor, and when the second signal is output from the sensor, the second tray Can be moved to a set pattern.

In this embodiment, when the refrigerator is turned on, when the first signal is output from the sensor, the controller rotates the second tray in the reverse direction until the second signal is output from the sensor, and then the The second tray can be moved in a set pattern.

A method of controlling a refrigerator according to another aspect may include turning on the refrigerator; When a second signal is output from the sensor, the control unit moving the second tray in a set pattern; When the first signal is output from the sensor, moving the second tray in a reverse direction until the second signal is output from the sensor and then moving the second tray in a set pattern; And moving the second tray to a water supply position when the first signal is output from the sensor after moving the second tray in a set pattern.

In one embodiment, the water supply position of the second tray is set to a position different from the ice-making position, and the second tray may be moved to the ice-making position by rotating in a forward direction from the water supply position.

The step of moving the second tray in a set pattern includes moving the second tray in a reverse direction by A seconds, and moving the second tray in a forward direction by B seconds less than A seconds. I can.

Moving the second tray to the water supply position may include moving the second tray in a forward direction until the second signal is output from the sensor; Additionally moving the second tray forward for C seconds at the time when the second signal is output from the sensor; And stopping the second tray after moving the second tray in a reverse direction until the first signal is output from the sensor.

In the step of moving the second tray to the water supply position, the second tray may be stopped after moving the second tray in a forward direction until the second signal is output from the sensor.

A refrigerator according to another aspect may include a first tray assembly forming a part of the ice making cell and a second tray assembly forming another part of the ice making cell.

The tray assembly may be defined as a tray. The tray assembly may be defined as a tray and a tray case surrounding the tray.

The first tray assembly may include a first tray, and the second tray assembly may include a second tray.

The refrigerator may further include a heater positioned adjacent to at least one of the first tray assembly and the second tray assembly.

Any one of the first and second tray assemblies may be closer to the heater than the other tray assembly. The heater may be disposed on any one of the tray assemblies.

The refrigerator may further include a driving unit connected to the second tray assembly. By the driving unit, the second tray assembly may contact the first tray assembly during an ice making process, and may be spaced apart from at least a portion of the first tray assembly during an ice making process. The refrigerator may further include a control unit that controls the heater and the driving unit.

The control unit may control the cooler to supply cold to the ice making cell after moving the second tray assembly to the ice making position after the water supply of the ice making cell is completed. The cooler may be defined as a means for cooling the storage chamber including at least one of a cold air supply means including an evaporator and a thermoelectric element.

After the ice making in the ice making cell is completed, the controller may control the second tray assembly 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.

The control unit may start water supply after the second tray assembly is moved to the water supply position in the reverse direction after the ice-breaking is completed. The control unit may control the heater to be turned on so that ice is easily separated from the tray assemblies before the second tray assembly moves in a forward direction to the moving position.

An additional heater may be disposed on the other tray assembly. The heating amount of the additional heater may be less than the heating amount of the heater in at least some sections while the cooler supplies cold.

The driving unit may further include a cam. The cam may have a path in which the lever moves therein. The cam may be directly or indirectly connected to the second tray assembly.

The control unit may control the position of the second tray to be determined according to the movement position (linear/rotary movement) of the driving unit. The control unit may control the position of the cam to be determined according to the movement position (linear/rotary movement) of the driving unit. A gear may be formed on the outer peripheral surface of the cam. The cam may have a rotation shaft formed in the center.

After the ice making in the ice making cell is completed, the controller may control the cam to move in the first direction (or forward direction) until the second tray is moved to the ice making position.

The refrigerator includes a first edge formed with a surface for pressing ice or a tray (or tray assembly) to easily separate ice from the trays (or tray assemblies), a bar extending from the first edge, and an end of the bar It may further include a pusher having a second edge located at.

The controller may move at least one of the pusher and the second tray assembly to control a relative position between the pusher and the second tray assembly to change. During the ice breaking process, in order to increase the pressing force applied by the pusher to the ice of the second tray (or the second tray assembly), the control unit moves the second tray (or the second tray assembly) to the ice breaking position. After that, the cam can be controlled to stop after moving further in the first direction.

In order to reduce a reduction in the pressing force applied by the pusher to the ice of the second tray (or the second tray assembly) due to the deformation of the second tray (or the second tray assembly) during the ice breaking process, the controller , After the second tray (or the second tray assembly) is moved to the moving position, the cam may be controlled to stop after further moving in the first direction.

The control unit controls the second tray (or the second tray assembly) and the cam to rotate, and the ice-breaking position may be a position in which the rotation angle of the cam is greater than 90 degrees based on the ice-making position. The rotation angle of the cam may be a position greater than 90 degrees and less than 180 degrees. The rotation angle of the cam may be a position greater than 90 degrees and less than 150 degrees. The rotation angle of the cam may be a position greater than 90 degrees and less than 140 degrees.

The controller may control the cam to move in the second direction (reverse direction) until the second tray (or the second tray assembly) is moved to the water supply position after the eaves are completed. After the second tray (or the second tray assembly) is moved to the water supply position, the control unit may control the cam to move further in the second direction and then stop. The second direction may be a direction opposite to the direction of gravity. Considering the inertia of the tray (tray assembly) and the motor, it is more advantageous for position control to further rotate the cam in a direction opposite to the direction of gravity.

The control unit controls the second tray (or second tray assembly) and the cam to rotate, and the water supply position is at least a part of the ice making cell formed by the second tray (or second tray assembly). It may be a position before reaching the horizontal reference line passing through the center of the rotation axis of the driving unit.

In the ice making position, the rotation angle of the cam may be set to be zero.

The controller controls the second tray (or the second tray assembly) and the cam to rotate, and at the water supply position, the rotation angle of the cam may be greater than zero. The rotation angle of the cam may be greater than 0 degrees and less than 20 degrees. The rotation angle of the cam may be greater than 5 degrees and less than 15 degrees.

The controller may control the cam to move in the second direction (reverse direction) until the second tray (or the second tray assembly) is moved to the ice making position after the water supply of the ice making cell is completed. .

In the ice-making process, the control unit, after the second tray (or the second tray assembly) is moved to the ice-making position, to increase the coupling force between the first and second trays, the cam moves the second It can be controlled to move further in the direction. The controller controls the second tray (or second tray assembly) and the cam to rotate, and the ice making position is at least a part of the ice making cell formed by the second tray (or second tray assembly). It may be a position reaching the horizontal reference line passing through the center of the rotation axis of the driving unit.

The control unit controls the second tray (or the second tray assembly) and the cam to rotate, and in the ice making position, the position of the cam may be greater than (-)30° and less than 0°. The rotation angle of the cam may be greater than (-)25 degrees and less than (-)5 degrees. The rotation angle of the cam may be greater than (-)20 degrees and less than (-)10 degrees.

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, according to 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 change in the amount of heat transfer 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 can do.

In addition, according to the present embodiment, even if the water supply position and the ice-making position of the second tray are set to different positions, as the signal output from the sensor is set so that the signals of the water supply position and the ice-making position and the signal of the interval between them are different, The second tray can be moved accurately to the water supply position.

Further, according to the present embodiment, damage to the driving unit may be prevented while the second tray is moved to the water supply position.

In addition, in the present embodiment, even if the refrigerator is turned on again after the refrigerator is turned off while ice is present in the ice making cell, ice in the ice making cell is prevented from falling into the ice bin while the second tray is moved to the water supply position. I can.

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 the movement of the second tray when full ice is not detected during the ice breaking process,
13 is a view showing the movement of the second tray when full ice is detected during the ice breaking process,
14 is a diagram showing movement of a second tray when full ice is detected again after full ice is detected.
15 is an exploded perspective view of a driving unit according to an embodiment of the present invention.
16 is a plan view showing an internal configuration of a driving unit.
17 is a view showing a cam of a driving unit and an operation lever.
18 is a view showing a positional relationship between a Hall sensor and a magnet according to the rotation of the cam.
19 is a flowchart illustrating a process of moving a second tray to a water supply position, which is an initial position, when the refrigerator is turned on.
20 is a view showing a process of moving a second tray to a water supply position when the refrigerator is turned on.

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 also serves as a tray case.

Accordingly, the first tray case 340 and the first tray cover 340 may be collectively referred to as a first tray case. The first tray 320 and the first tray case may be collectively referred to as a first tray assembly.

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 cover 360 also serves as a tray case.

Accordingly, the second tray case 400 and the second tray cover 360 may be collectively referred to as a second tray case.

The second tray 380 and the second tray case may be collectively referred to as a second tray assembly.

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.

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 ice detection lever 520 may be a swing type lever.

The ice detection lever 520 crosses the inside of the ice bin 600 during a rotation process.

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.

An extension direction of the first portion 521 may be parallel to an extension direction of a rotation center of the second tray 380.

Alternatively, the extension direction of the rotation center of the ice detection lever 520 may be parallel to the extension direction of the rotation center of the second tray 380.

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 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 full ice detection means 950 for detecting full ice of the ice bin 600.

The ice sensing means 950 may include, for example, the ice sensing lever 520, a magnet 4881 provided in the driving unit 480, and a sensor 4823 for detecting the magnet 481. I can. The sensor (refer to 4823 of FIG. 18) may be, for example, a Hall sensor.

The structure of the driving unit 480 will be described later.

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.

In the process of moving the second tray 380 (or ice detection lever 520) from the ice making position to the water supply position, the first signal is output from the sensor (refer to 4823 in FIG. 18) and moves to the water supply position. It may be designed to output a second signal from the sensor (refer to 4823 of FIG. 18).

In addition, a second signal is output from the sensor (refer to 4823 in FIG. 18) while the second tray 380 moves from the water supply position to the full ice detection position, and when the second tray 380 moves to the full ice detection position, the sensor ( See 4823 of FIG. 18) may be designed to output the first signal.

In addition, a second signal is output from the sensor (refer to 4823 in FIG. 18) while the second tray 380 moves from the ice detection position to the ice ice position, and when the second tray 380 moves to the ice ice position, the sensor (Fig. 18 of 4823) may be designed to output the first signal.

Accordingly, when the first signal is output from the sensor (refer to 4823 in FIG. 18) for a predetermined time after the second tray 380 passes the water supply position during the ice-bing process, the controller 800 It can be judged as.

On the other hand, the controller 800 does not output the first signal from the sensor (refer to 4823 of FIG. 18) during the reference time during the ice-bing process, or the second signal from the sensor (refer to 4823 of FIG. 18) during the reference time. When is continuously outputted, it may be determined that the ice bean 600 is in a full ice state.

As another example, the ice detection means 950 may include a light-emitting unit and a light-receiving unit provided in the ice bin 600. In this case, the full ice detection lever 520 may be omitted. When the light irradiated from the light-emitting unit reaches the light-receiving unit, it may be determined that the ice is not full. If the light irradiated from the light emitting unit does not reach the light receiving unit, it may be determined that it is full.

In this case, the light emitting unit and the light receiving unit may be provided in the ice maker. In this case, the light emitting part and the light receiving part may be located in the ice bin.

As described above, since the type and time of the signal output from the sensor (refer to 4823 in FIG. 18) are different for each location of the second tray 380, the controller 800 determines the current location of the second tray 380 You can accurately grasp.

The second tray 380 may also be described as being in the full ice detection position when the full ice detection lever 520 is in the full ice detection position.

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.

FIG. 12 is a view showing the movement of the second tray when full ice is not detected during the eaves process, FIG. 13 is a view showing the movement of the second tray when full ice is detected during the eaves process, and FIG. 14 Thereafter, it is a view showing the movement of the second tray when full ice is detected again.

FIG. 12(a) shows a state in which the second tray has moved to the ice making position, and FIG. 12(b) shows a state in which the second tray and the full ice detection lever have moved to the ice-making position, and FIG. 12 (C) of shows a state in which the second tray has moved to the eaves position.

13D shows a state in which the second tray has moved to the water supply position.

6 to 14, in order to generate ice in the ice maker 200, the control unit 800 moves the second tray 380 to a water supply position (S1).

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

On the other hand, the direction of moving from the ebbing position of FIG. 12(c) to the water supply position of FIG. 13(d) may be referred to as a reverse movement (or reverse rotation).

When it is sensed that the second tray 380 has moved to the water supply position, the control unit 800 stops the driving unit 480.

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

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, when a pulse is output from a flow sensor (not shown) and the output pulse reaches a reference pulse, it may be determined that water equal to the water supply amount has been supplied.

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 mass per unit height of water in the ice making cell 320a is different, so that per unit height The rate at which ice is produced 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.

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).

When it is determined that the ice making is completed, the control unit 800 may turn off the transparent ice heater 430 (S9).

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 and turn off the transparent ice heater 430.

At this time, in the case of 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 the ice making cells 320a, the controller 800 The ice-making may start after a predetermined time elapses from the time when it is determined that the ice-making is complete or when the temperature sensed by the second temperature sensor 700 reaches a second reference temperature lower than the first reference temperature.

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 (S10).

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 The on heaters 290 and 430 are turned off.

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

For eaves, 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, while the second tray 380 moves, 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 the present embodiment, when the second tray 380 is moved to the moving position, the second tray 380 may be pressed by the second pusher 540 to change its shape.

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 (S12).

As an example, when the full ice detection lever 520 is rotated together with the second tray 380, when the full ice detection lever 520 moves to the full ice detection position, the sensor Since 1 signal is output, it may be determined that the ice bin 600 is not full.

In a state in which the full ice detection lever 520 is moved to the full ice detection position, the first body 521 of the full ice detection lever 520 is located in the ice bin 600.

In this case, the maximum distance from the upper end of the ice bin 600 to the first body 521 may be set to be smaller than a radius of ice generated in the ice making cell 320a.

This means that the first body 521 lifts the ice stored in the ice bin 600 while the ice detection lever 520 moves to the ice detection position so that ice is discharged from the ice bin 600. This is to prevent.

In addition, the first body 521 is lower than the second tray 380 in the process of rotating the ice detection lever 520 to prevent interference between the ice detection lever 520 and the second tray 380. It may be positioned, and spaced apart from the second tray 380.

On the other hand, in the process of rotating the full ice detection lever 520, before the full ice detection lever 520 moves to the full ice detection position, if the full ice detection lever 520 interferes with ice, the sensor 1 signal is not output.

Accordingly, when the first signal is not output from the sensor for a reference time during the ice-ving process or the second signal is continuously output from the sensor during the reference time, the ice bin 600 It can be determined that this is full.

If it is determined that the ice bin 600 is not full ice, the controller 800 controls the driving unit 480 to the ice ice position of the second tray 380 as shown in FIG. 12C.

As described above, when the second tray 380 moves to the icebreaking position, ice may be separated from the second tray 380.

After the ice is separated from the second tray 380, the controller 800 controls the driving unit 480 so that the second tray 380 moves in the reverse direction (S14).

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, 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.

On the other hand, as a result of the determination in step S12, if it is determined that the ice bin 600 is full ice, the control unit 800 causes the second tray 380 to move to the ice ice position. 480) is controlled (S15).

That is, in the present embodiment, even when full ice is first detected by the full ice detection means, the ice is separated from the second tray 380.

Then, the control unit 800 controls the driving unit 480 to move the second tray 380 in a reverse direction to move to the water supply position (S16).

The controller 800 may determine whether a set time has elapsed while the second tray 380 has moved to the water supply position (S17).

When the set time elapses while the second tray 380 is moved to the water supply position, whether or not the ice is filled may be detected again (S19).

For example, the control unit 800 controls the driving unit 480 to move the second tray 380 from the water supply position to the full ice detection position.

That is, in the present embodiment, after the second tray 380 moves to the ice ice position for ice ice, the full ice detection may be repeatedly performed at a predetermined period.

As a result of determination in step S19, when full ice is detected, the second tray 380 moves to the water supply position and waits.

On the other hand, as a result of the determination in step S19, when full ice is not detected, the second tray 380 may move from the ice detection position to the ice ice position and then to the water supply position. Alternatively, the second tray 380 may be moved in a reverse direction from the full ice position to move to the water supply position.

In the present embodiment, even when full ice is detected, the reason for the ice is as follows.

If, after completion of ice making, full ice is sensed and waits in a state in which ice exists in the ice making cell 320a, the ice in the ice making cell 320a may melt due to an abnormal situation such as a power failure.

In this state, when the abnormal situation is released, the water melted in the ice making cell 320a may be changed to ice again.

However, since full ice has already been detected, the transparent ice heater does not operate and waits at the water supply position, so that the ice generated in the ice making cell 320a is not transparent.

If the non-transparent ice is undetected in the future and ice, the user uses the opaque ice, which may cause emotional dissatisfaction with the user.

Alternatively, when full ice is sensed after the completion of ice making and waits in a state in which ice exists in the ice making cell 320a, the ice in the ice making cell 320a may be melted due to an abnormal situation such as opening of the door for a long time.

As described above, when the second tray is waiting at the water supply position, the ice is detected again after a set time. When melted water is present in the ice making cell 320a, the movement process of the second tray 380 There is a problem in that the water falls into the ice bin 600. In this case, a problem occurs in that ice stored in the ice bin 600 sticks to each other by falling water.

However, as in the present embodiment, when ice does not exist in the ice making cell in the waiting process after detection of full ice, the above problem can be fundamentally controlled.

On the other hand, in the case of the present embodiment, when the second tray 380 waits at the water supply position when sensing full ice, the second tray 380 is prevented from sticking to the first tray 320, so that the ice is detected later. When the second tray 380 is able to move smoothly.

15 is an exploded perspective view of a driving unit according to an embodiment of the present invention, FIG. 16 is a plan view showing an internal configuration of the driving unit, FIG. 17 is a view showing a cam and an operation lever of the driving unit, and FIG. 18 is It is a diagram showing the positional relationship between the Hall sensor and the magnet.

Figure 18 (a) shows a state in which the Hall sensor and the magnet are aligned in the first position of the magnet lever, and Figure 18 (b) shows the state in which the Hall sensor and the magnet are not aligned in the first position of the magnet lever. Show.

15 to 18, the drive unit 480 is organically formed along a motor 4822, a cam 4830 rotated by the motor 4822, and a cam surface for a sensing lever of the cam 4830. It may include an interlocking actuating lever 4840.

In addition, the driving unit 480 may further include a lever coupling unit 4850 that rotates (swings) the ice detection lever 520 left and right while being rotated by the operation lever 4840.

The driving unit 480 includes a magnet lever 4860 that organically interlocks along a cam surface for a magnet of the cam 4830, the motor 4822, a cam 4830, an operation lever 4840, and a lever coupling unit ( A case 4810 in which the 4850 and the magnet lever 4860 are incorporated may be further included.

The case 4810 includes a first case 4811 in which the motor 4822, a cam 4830, an operation lever 4840, a lever coupling part 4850, and a magnet lever 4860 are built-in, and the first A second case 4815 covering the case 4811 may be included.

The motor 4822 generates power for rotating the cam 4830.

The driving unit 480 may further include a control panel 4821 coupled to an inner side of the first case 4811. The motor 4822 may be connected to the control panel 4821.

A sensor 4823 may be provided on the control panel 4821. The sensor 4823 may output a first signal and a second signal according to a position relative to the magnet lever 4860.

As shown in FIG. 17, the cam 4830 may include a coupling portion 4831 to which the rotation arm 460 is coupled. The coupling part 4831 serves as a rotation shaft of the cam 4830.

The cam 4830 may include a gear 4832 to transmit power to the motor 4822. The gear 4832 may be formed on an outer peripheral surface of the cam 4830.

The cam 4830 may include a cam surface 4833 for a sensing lever and a cam surface 4834 for a magnet. That is, the cam 4830 forms a path through which the levers 4840 and 4860 move.

The sensing lever cam surface 4833 is formed with a sensing lever cam groove 4833a for rotating the ice sensing lever 520 by lowering the operation lever 4840.

The magnet cam surface 4834 is formed with a magnet cam groove 4834a for lowering the magnet lever 4860 so that the magnet lever 4860 and the hall sensor 423 are separated from each other.

A reduction gear 4870 may be provided between the cam 4830 and the motor 4822 to reduce the rotational force of the motor 4822 and transmit it to the cam 4830.

The reduction gear 4870 includes a first reduction gear 4871 connected to the motor 4822 so as to transmit power, a second reduction gear 4872 meshing with the first reduction gear 4871, and the first reduction gear 4870. It may include a second reduction gear (4872) and a third reduction gear (4873) connecting the cam (4830) to enable power transmission.

One end of the operation lever 4840 is fitted and coupled to the rotation shaft of the third reduction gear 4873 so as to be freely rotatable, and a gear 4882 formed at the other end is connected to the lever coupling portion 4850 so as to transmit power. That is, when the operation lever 4840 is moved, the lever coupling part 4850 rotates.

The lever coupling part 4850 has one end rotatably connected to the operation lever 4840 inside the case 4810, and the other end protrudes to the outside of the case 4810 to detect the filling detection lever 520 ) And is combined.

The magnet lever 4860 has a central portion rotatably provided in the case 4810, an end portion that is organically interlocked along the magnet cam surface 4834 of the cam 4830, and is aligned with the sensor 4823 Or it may include a magnet (4861) spaced apart from the sensor (4823).

As shown in (a) of FIG. 18, when the magnet 4881 is aligned with the sensor 4824, any one of the first signal and the second signal may be output from the sensor 4823.

As shown in (b) of FIG. 18, when the magnet 4881 is out of the position facing the sensor 4824, another signal among the first signal and the second signal may be output from the sensor 4824. have.

The cam groove for the sensing lever so that the operation lever 4840 moving along the cam surface 4833 for the sensing lever is not inserted into the cam groove for the sensing lever 4833a when the ice sensing lever 500 returns to the rotation shaft of the cam 4830. A blocking member 4880 for selectively blocking the 4833a may be provided.

That is, the blocking member 4880 includes a coupling portion 4881 rotatably coupled to the rotation axis of the cam 4830, and a protrusion formed on one side of the coupling portion 4881 and formed on the bottom surface of the case 4810. While being coupled to the 4813 may include a locking groove 4882 for limiting the rotation angle of the coupling portion 4881.

In addition, the blocking member 4880 is provided on the outside of the coupling portion 4881 and is supported or separated by the operating lever 4840 when the cam gear rotates forward or reverse, so that the operating lever 4840 is used for the sensing lever. It may further include a support protrusion (4883) for limiting the operation so as not to be inserted into the cam groove (4833a).

In addition, the driving unit 480 may further include an elastic member 4890 that provides an elastic force so that the lever coupling unit 4850 rotates in one direction. One end of the elastic member 4890 may be connected to the lever coupling portion 4850 and the other end may be fixed to the case 4810.

A protrusion 4833b may be provided between the cam surface 4833 for the sensing lever of the cam 4830 and the cam groove 4833a.

On the other hand, since the rotation arm 460 is connected to the cam 4830, the rotation angle of the cam 4830 in the process of moving from the ice making position to the ice making position or the process of moving from the ice making position to the ice making position May be the same as the second tray 380.

However, as described above, due to the relatively rotatable structure of the rotation arm 460 and the second tray supporter 400, the cam 4830 is in a state in which the second tray 380 is moved to the ice making position. May be additionally rotated while the second tray 380 is stopped.

The ice making position may be a position in which at least a part of the ice making cell formed by the second tray 380 reaches a reference line passing through the rotation center of the shaft 440 (which is the rotation center of the driving unit). The water supply position may be a position before at least a part of the ice making cell formed by the second tray 380 reaches a reference line passing through the rotation center of the shaft 440.

It is assumed that the rotation angle of the cam 4830 is 0 in the ice making position. The cam 4830 may be further rotated in a reverse direction due to a difference in length between the second protrusion 463 of the rotation arm 460 and the extension hole 404b of the extension part 403.

That is, in the ice making position of the second tray 380, the cam 4830 may additionally rotate in the reverse direction.

The rotation angle of the cam 4830 when the cam 4830 rotates in the reverse direction in the ice making position may be referred to as a negative rotation angle.

In the ice making position, the rotation angle of the cam 4830 when the cam 4830 is rotated in a forward direction toward a water supply position or an ice ice position may be referred to as a (+) rotation angle. Hereinafter, in the case of the (+) rotation angle, (+) will be omitted.

In the ice making position, the cam 4830 may be rotated by a first rotation angle to the water supply position. The first rotation angle may be greater than 0 degrees and less than 20 degrees. Preferably, the first rotation angle may be greater than 5 steps and less than 15 degrees.

By setting the water supply location according to the present embodiment, water that has fallen to the second tray 380 can be evenly spread to the plurality of ice making cells 320a, while preventing the overflow of water that has fallen to the second tray 380 Can be.

In the ice making position, the cam 4830 may be rotated to the ice making position by a second rotation angle. The second rotation angle may be greater than 90 degrees and less than 180 degrees. Preferably, the second rotation angle may be greater than 90 degrees and less than 150 degrees. More preferably, the second rotation angle may be greater than 90 degrees and less than 150 degrees.

In the eaves position, the cam 4830 may be additionally rotated by a third angle. Due to the assembly tolerance of the cam 4830 and the rotation arm 460, the rotation angle difference in each of the pair of rotation arms due to the cam 4830 being coupled to one of the pair of rotation arms 460, etc. The cam 4830 may be further rotated by a third rotation angle in the forward direction while the second tray assembly is moved to the moving position. When the cam 4830 is further rotated in the forward direction, a pressing force applied by the second pusher 540 to press the second tray 380 may be increased.

In the ebbing position, the cam 4830 may be rotated in a reverse direction, and after the second tray 380 is moved to the water supply position, the cam 4830 may be further rotated in the reverse direction. I can. The reverse direction may be a direction opposite to the direction of gravity. Considering the inertia of the tray assembly and the motor, if the cam further rotates in a direction opposite to the direction of gravity, it is advantageous in controlling the water supply position.

In the ice making position, the cam 4830 may be rotated by a fourth rotation angle in a reverse direction. The fourth rotation angle may be set in a range between 0 degrees and (-) 30 degrees. Preferably, the fourth rotation angle may be set in a range between (-)5 degrees and (-)25 degrees. More preferably, the fourth rotation angle may be set in a range between (-)10 degrees and (-)20 degrees.

FIG. 19 is a flowchart illustrating a process of moving a second tray to a water supply position, which is an initial position, when the refrigerator is turned on, and FIG. 20 is a diagram illustrating a process of moving a second tray to a water supply position when the refrigerator is turned on. to be.

First, a signal output from the sensor 4824 for each position of the second tray 380 will be described.

In the present specification, the ice making position may be referred to as a first position section P1, and a second signal may be output from the sensor 4824 in the first position section P1.

When the second tray 380 is rotated in the forward direction in the first position section P1, the first signal may be output from the sensor 4824 for a first time.

After the first signal is output for the first time, a second signal may be output from the sensor 4824.

In the present embodiment, the position of the second tray 380 when the signal of the sensor 4824 changes from the first signal to the second signal may be set as a water supply position.

Of course, the position of the second tray 380 when the signal of the sensor 4824 changes from the second signal to the first signal while the second tray 380 is rotated in the reverse direction is also a water supply position.

As a result, the position of the second tray 380 at the time when the signal output from the sensor 4824 changes may be set as a water supply position.

A section between the ice making location and the water supply location may be referred to as a second location section P2.

A section between the water supply location and the ice detection location may be referred to as a third location section P3.

In the third position section P3, a second signal may be output from the sensor 4824.

In the third position section P3, the second signal may be output for a second time from the sensor 4824.

While the second signal is output from the sensor 4824 in the third position section P3, the first signal may be output from the sensor 4823.

The position of the second tray 380 (or the full ice detection lever 520) when the signal output from the sensor 4824 changes from the second signal to the first signal is the full ice detection position.

At the full ice detection position, a first signal may be output from the sensor 4824 and the first signal may be output for a third time while the second tray 380 moves to the ice ice position.

After the first signal is output for the third time, the second signal may be output again from the sensor 4824.

A section in which the first signal is output for a third time may be referred to as a fourth position section P4.

After passing through the fourth position section P4, a first signal may be output while the second signal is output from the sensor 4824 while the second tray 380 is rotated in the forward direction.

After passing through the fourth position section P4, a time until the first signal is output from the sensor 4824 may be a fourth time.

In this case, the position of the second tray 380 when the first signal is again output from the sensor 4824 after the second signal is output for a fourth time period is an ebbing position.

A section in which the second signal is output during the fourth time may be referred to as a fifth position section P5.

The ebbing position may be referred to as a sixth position section P6.

When the second tray 380 is moved in the forward direction from the ice-making position, the second tray 380 moves to the ice-breaking position after passing through the water supply position and the full ice detection position.

On the other hand, when the second tray 380 moves in the reverse direction from the ice-breaking position, the second tray 380 moves to the ice-making position past the full ice detection position and the water supply position.

In the present specification, the lengths of each of the location sections P1 to P6 may be set differently, and the control unit 800 may determine the length of the second tray 380 according to the pattern and length of the signal output from the sensor 4824. The location can be identified, and the identified location can be stored in a memory.

However, when the refrigerator is turned off such as a power outage, the location information of the second tray 380 stored in the memory is reset.

When the refrigerator is turned on again in this state, the control unit 380 does not recognize the current position of the second tray 380, so an algorithm for moving the position of the second tray 380 to the initial position is performed. Can be done.

In this embodiment, the initial position of the second tray 380 is a water supply position.

First, when the refrigerator is turned on (S21), the controller 800 may turn on the ice ice heater 290 and/or the transparent ice heater 430 (S22).

When the refrigerator is turned off while ice is present in the ice making cell 320a, the ice in the ice making cell 320a may be melted.

Unless the second tray 380 is in the ice making position when the refrigerator is turned off, water flows between the first tray 320 and the second tray 380 during ice melting. In a state in which ice is not completely melted, ice is present in a state attached to the first tray 320 and the second tray 380.

In this state, when the refrigerator is turned on and the second tray 380 is immediately moved, the second tray 380 may not move smoothly.

Accordingly, in this embodiment, when the refrigerator is turned on, the ice-ice heater 290 and/or the transparent ice heater 430 are turned on so that the second tray 380 moves smoothly.

The controller 800 determines whether the ice ice heater 290 and/or the transparent ice heater 430 is turned on and the temperature sensed by the second temperature sensor 700 reaches a set temperature ( S23).

The set temperature may be set as an image temperature, for example. The set temperature may be the same as or different from the off reference temperature described above.

As a result of the determination in step S23, when it is determined that the temperature sensed by the second temperature sensor 700 has reached a set temperature, the controller 800 may turn off the turned on heater (S24).

Of course, in the present embodiment, steps S22 to S24 may be omitted, and in this case, when the refrigerator is turned on, step S25 may be performed immediately.

The controller 800 may determine whether a second signal is output from the sensor 4824 (S25).

When the second signal is output from the sensor 4823, the second tray 380 is selected from one of the first position section P1, the third position section P3, and the fifth position section P5. This is the case where it is located in a section.

On the other hand, when the first signal is output from the sensor 4824, the second tray 380 is in the second position section (P1), the third position section (P3), and the fifth position section (P5). This is the case where it is located in one section.

When the second signal is output from the sensor 4824, the controller 800 moves the second tray 380 in the reverse direction (S26).

In the present embodiment, when the second tray 380 is moved in the reverse direction, it is to prevent the water from the ice making cell 320a from falling downward when water is present in the ice making cell 320a. .

While the second tray 380 is moved in the reverse direction, the control unit 800 determines whether a second signal is output from the sensor 4823 (S25).

When the second signal is output from the sensor 4823 in a total of six position sections, if the second tray 380 is rotated in the reverse direction until the first signal is output from the sensor 4824, the expected The location section of the second tray 380 may be reduced to three.

Accordingly, the time required to move the second tray 380 to the initial position can be reduced, and the algorithm can be simplified.

As a result of the determination in step S25, when the second signal is output from the sensor 4824, the controller 800 may control the driving unit 480 so that the second tray 380 moves in a set pattern ( S27).

When the second tray 380 moves in a set pattern, it means that the second tray 380 moves in the reverse direction by A seconds and then moves in the forward direction by B seconds.

In this case, B seconds may be set smaller than A seconds. After the second tray 380 moves in the reverse direction by A seconds, before moving in the forward direction, the second tray 380 may stop by D seconds. D seconds may be less than A seconds and B seconds.

When A second is set smaller than B second, the time to move in the reverse direction is shorter than the time to move in the forward direction of the second tray 380.

In this way, when A seconds is set smaller than B seconds, even if water is present in the ice making cell 320a in the process of moving the second tray 380 to the set pattern, it is possible to prevent it from falling below the water. have.

In this embodiment, A second may be set to be greater than the length of the second position section P2.

After the second tray 380 is moved in a set pattern, the control unit 800 determines whether the first signal is output from the sensor 4823 (S28).

When the first signal is output from the sensor 4824, the second tray 380 is positioned in the first position section P1 at a point in time when the second tray 380 moves to a set pattern. This is the case.

On the other hand, when the first signal is not output from the sensor 4824, the second tray 380 moves to the third position section P3 or the second tray 380 moves to a set pattern. This is the case where it is located in the fifth position section P5.

That is, even when the second tray 380 is located in the third position section P3 or the fifth position section P5, even if the second tray 380 moves to a set pattern, the second tray 380 is It is located in (P3) or the fifth position section (P5).

As a result of the determination in step S28, if it is determined that the first signal is output from the sensor 4823, the control unit 800 is configured to the second tray until the second signal is output from the sensor 4824. 380) is moved in the forward direction (S31).

When the second signal is output from the sensor 4823 during the forward movement of the second tray 380, the controller 800 additionally moves the second tray 380 in the forward direction by C seconds. Make it possible (S32) (see Fig. 16).

C seconds can be set smaller than A seconds and B seconds.

When the second tray 380 is moved in the forward direction by C seconds, the control unit 800 rotates the second tray 380 in the reverse direction (S33), and the first signal is detected by the sensor 4823. When it occurs (S34), the second tray 380 is stopped (S35).

Of course, when the second signal is output from the sensor 4824 during the forward movement of the second tray 380, the controller 800 may control the second tray 380 to stop immediately. Do. The position stopped in this way is the water supply position.

On the other hand, as a result of the determination in step S28, if the first signal is not output from the sensor 4824, the control unit 800 operates the second tray 380 until the first signal is output from the sensor 4824. Move in the reverse direction (S29)

Then, the second tray 380 positioned in the third location section P3 may move to the second location section P2. The second tray 380 located in the fifth location section P3 may move to the fourth location section P4.

After the first signal is output from the sensor 4823 in the process of moving the second tray 380 in the reverse direction, the control unit 800 operates until the second signal is outputted from the sensor 4823. The second tray 380 is further moved in the reverse direction (S30).

Then, the second tray 380 positioned in the second location section P2 may move to the first location section P1. The second tray 380 positioned in the fourth location section P3 may move to the third location section P3.

When the second signal is output from the sensor 4823 by further moving the second tray 380 in the reverse direction, the controller 800 is configured to set the second tray 380 in a set pattern. Let it move (S27).

After performing steps S29 and S30, and performing step S28 again, if the first signal is output from the sensor 4824, the second tray ( This is the case where 380 is located in the first position section P1.

On the other hand, if the first signal is not output from the sensor 4824, when the second tray 380 is located in the third position section P1 at the time when the second tray 380 moves to a set pattern to be.

Accordingly, as a result of determination in step S28, when the first signal is output from the sensor 4824, steps S31 to S35 are performed so that the second tray 380 moves to the initial position.

In the present embodiment, steps S31 to S35 may be collectively referred to as a step in which the second tray 380 moves to an initial position (or a water supply position).

On the other hand, as a result of determination in step 28, if the first signal is not output from the sensor 4824, after steps S29 and 28 are performed, through the determination process of step S28, steps S31 to S35 are performed. I can.

As described above, when the second tray 380 is positioned in the first position section P1 when the refrigerator is turned on, the second tray 380 moves in a set pattern.

When the second tray 380 moves in the forward direction while the second tray 380 is positioned in the first position section P1, the second tray 380 and the first tray 320 In a contacted state, a moving force is transmitted to the second tray 380.

However, when the second tray 380 and the first tray 320 are in contact with each other, the second tray 380 may no longer move.

Of course, when the first tray 320 and the second tray 380 are formed of an elastically deformable material, the second tray 380 may move as much as an elastic deformation is possible.

If the second tray 380 and the first tray 320 are in contact with each other and the moving force is transmitted to the second tray 380 for a long time, in order to move the second tray 380 There is a risk of overloading the running motor or damaging the gears for power transmission.

Accordingly, in the present embodiment, A seconds may be determined based on the specifications of the motor and/or the gears so as to prevent damage to the drive unit 480 while the second tray 380 moves in a set pattern. . Although not limited, A second can be set to 2 seconds.

On the other hand, when the second tray 380 is moved to the water supply position through a series of steps, it is determined whether or not ice making is completed in a state in which additional water supply is not performed, and the ice making process is performed after the ice making is completed. Thereafter, water supply can be performed after returning to the water supply position.

When the refrigerator is turned off and then turned on while ice is present in the ice making cell 320a, the second tray 320 may move to a water supply position. However, when water supply starts in this state, water overflows in the ice making cell 320a, and there is a fear that the overflowed water may fall into the ice bin 600. When water falls into the ice bin 600, there is a problem that the ice in the ice bin 600 becomes agglomerated with each other.

Accordingly, when the refrigerator is turned on, the second tray 380 moves to the ice making position without water supply, and the ice making process is performed, and water supply may be started after the ice ice is completed.

As another example, while the second tray 380 is positioned for water supply through a series of steps, the position of the second tray 380 at the time when the refrigerator is turned on may be determined.

When the second tray 380 is located in the sixth position section P6 when the refrigerator is turned on, water supply may be started immediately after the second tray 380 returns to the water supply position.

When the second tray 380 is located in the sixth position section P6 when the refrigerator is turned on, since the second tray 380 has moved to the ice-breaking position, ice is separated from the ice-making cell 320a. It can be judged that it has become. Therefore, water supply may start immediately after the second tray 380 moves to the water supply position.

On the other hand, when the second tray 380 is located in any one of the first position section to the fifth position section P1 to P5 when the refrigerator is turned on, the second tray 380 moves to the water supply position. After returning, watering may be started after deicing and ice breaking processes.

The refrigerator of the present invention is characterized in that the second tray 380 can move to at least two or more of an ice making position, a water supply position, a full ice detection position, and an ice ice position so that ice can be generated and iced inside the tray. To do.

In this case, an abnormal mode in which power applied to the refrigerator is cut off due to a power outage or a breakdown occurs, or it is necessary to move the position of the second tray 380 to a predetermined position for a service mode such as a failure repair.

This operation is defined as an initial operation of the second tray 380. The start time of the initial operation may be understood as a time when the abnormal mode is terminated or a time when the cut off power is applied again. In addition, the starting point of the initial operation may be understood as a point in time when the service mode is started, and a point in time when the mode of the refrigerator is switched to the service mode for repair or the like.

The initializing operation is mainly designed to move the second tray 380 to a water supply position. The reason is that when the second tray 380 is moved to a water supply position by the initial operation, a water supply process can be performed immediately and an ice-making process can be performed thereafter.

If the signal output from the sensor 4824 is the second signal at a time when the initial operation of the second tray 380 starts, the second tray 380 is It means that it is located in any one of the 3 position section P3 and the fifth position section P5. (Hereinafter the first case)

If the signal output from the sensor 4823 is the first signal at a time when the initial operation of the second tray 380 starts, the second tray 380 is It means that it is located in any one of the 4-position section P4 and the sixth location section P6. (Hereinafter the second case)

In the case of the first case, the control unit controls the second tray 380 to move in the set pattern.

The movement of the second tray 380 in the set pattern is as much as B seconds after the second tray 380 moves in the reverse direction for A seconds from the start of the initial operation of the second tray 380. It means moving in the forward direction.

In the case of the second case, the control unit controls the second tray 380 to move in the reverse direction until the signal output from the sensor 4824 is changed to the second signal. Then, the second tray 380 moves from the second location section P2 to the first location section P1, or from the fourth location section P4 to the third location section P3, It moves from the sixth position section P6 to the fifth position section P5. Then, the control unit controls the second tray 380 in the same way as when the second tray 380 is positioned in the first position section P1, the third position section P3, and the fifth position section P5. 380).

On the other hand, in the case of the first case, while moving the second tray 380 to the set pattern, the control unit may change the second tray 380 according to a signal output from the sensor 4824. Can be controlled.

First, the second tray 380 starts to move in the set pattern, and the output of the second signal from the sensor 4823 is maintained for A seconds when the second tray 380 moves in the reverse direction. , When B seconds after the second tray 380 moves in the forward direction, when the first signal is output from the sensor 4823, the second tray 380 is the first position section P1 Means that it was located in.

In this case, the control unit controls the second tray 380 to move in a forward direction from a point in time that the second tray 380 has elapsed by B seconds until the output from the sensor 4824 is changed to the second signal. The control unit recognizes a location where the second tray 380 is located as a water supply position when the output of the sensor 4824 is changed to the second signal.

Second, the second tray 380 starts to move in the set pattern, and the output of the second signal from the sensor 4823 is maintained for A seconds when the second tray 380 moves in the reverse direction. , When B seconds after the second tray 380 moves in the forward direction, if the second signal is still being output from the sensor 4823, the second tray 380 is in the third position section ( It means that it was located in P3) or the fifth position section P5. It is mainly located in the second half of the third position section P3 or the second half of the fifth position section P5. In this case, the controller controls the second tray 380 to continuously move in the reverse direction until the first signal is output from the sensor 4824.

Then, the second tray 380 will be located in the second position section P2 or the fourth position section P4. In this case, as described above for the case of the second case, the controller moves the second tray 380 in the reverse direction until the signal output from the sensor 4824 is changed to the second signal. To be controlled.

Then, the second tray 380 will be located in the first position section P1 or the third position section P3.

In this case, as described above for the case of the first case, the controller controls the second tray 380 to move in the set pattern.

Meanwhile, while moving the second tray 380 to the set pattern, the control unit moves the second tray 380 in one of the first method and the second method according to a signal output from the sensor 4823. Controlled by

Third, the second tray 380 starts to move in the set pattern, and the signal output from the sensor 4823 is in the second signal during A seconds when the second tray 380 moves in the reverse direction. When it is changed to the first signal, it means that the second tray 380 was located in the third position section P3 or the fifth position section P5. It is mainly located in the first half of the third location section P3 or the first half of the fifth location section P5. In this case, the second tray 380 is controlled to move in the reverse direction until the second signal is output from the sensor 4823.

Then, the second tray 380 will be located in the first position section P1 or the third position section P3. In this case, as described above for the case of the first case, the controller controls the second tray 380 to move in the set pattern.

Meanwhile, while moving the second tray 380 to the set pattern, the control unit moves the second tray 380 in one of the first method and the second method according to a signal output from the sensor 4823. Controlled by

Claims (23)

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;
A sensor for determining a position of the second tray in the process of moving the second tray;
And a control unit for controlling the heater and the driving unit,
The controller controls the cold air supply means to supply cool air to the ice-making cell after moving the second tray to the ice-making position after the water supply of 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,
When the second signal is output from the sensor when the initial operation of the second tray starts, the control unit moves the second tray in the reverse direction by A seconds and then moves the second tray by B seconds in the forward direction. Control,
After the second tray moves in the forward direction for B seconds and moves, if the first signal is output from the sensor, the control unit controls the second tray until the output from the sensor is changed to the second signal. Control to move in the direction,
The control unit recognizes a location where the second tray is located as a water supply position when the output of the sensor is changed to the second signal. The method of claim 1,
A refrigerator including at least one of a time when the abnormal mode in which power applied to the refrigerator is cut off ends, a time when the cut off power is reapplied, and a time when the refrigerator mode is switched to a service mode. . The method of claim 1,
When the first signal is output from the sensor when the initial operation of the second tray starts, the controller moves the second tray in the reverse direction until the second signal is output from the sensor. Refrigerator to be controlled. The method of claim 1,
When the refrigerator is turned on, the controller turns on the heater, and when the temperature sensed by the second temperature sensor reaches a set temperature, after turning off the heater,
A refrigerator that controls the driving unit to move the second tray to the water supply position based on a signal output from the sensor. The method of claim 1,
Further comprising a heater for ice for supplying heat to the ice making cell,
When the refrigerator is turned on, the controller turns on the ice-breaking heater, and when the temperature sensed by the second temperature sensor reaches a set temperature, after turning off the ice-breaking heater,
A refrigerator that controls the driving unit to move the second tray to the water supply position based on a signal output from the sensor. The method of claim 1,
The refrigerator B is smaller than the second A. The method of claim 1,
When the output of the sensor is changed to the second signal,
The controller further moves the second tray forward for C seconds at the time when the output of the sensor is changed to the second signal,
A refrigerator for stopping the second tray after moving the second tray in a reverse direction until a first signal is output from the sensor. The method of claim 1,
When the output of the sensor is changed to the second signal, the controller stops the second tray. 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. The method of claim 9,
The control unit, while maintaining the cooling power of the cold air supply means the same,
A refrigerator that controls the heating amount of the heater so that the heating amount of the heater when the mass per unit height of water is large is smaller than the heating amount of the heater when the mass per unit height of water is small. The method of claim 9,
The control unit, while maintaining the same heating amount of the heater,
A refrigerator that controls the cooling power of the cold air supply means so that the cooling power of the cold air supply means when the mass per unit height of water is large is greater than the cooling power of the cold air supply means when the mass per unit height of water is small. The method of claim 1,
The control unit, so that the ice-making speed of the water inside the ice-making cell is maintained within a predetermined range lower than the ice-making speed when ice-making is performed with the heater off,
The heating amount of the heater is increased when the amount of heat transfer between the cold in the storage compartment and the water in the ice-making cell increases, and when the amount of heat transfer between the cold in the storage compartment and the water in the ice-making cell decreases, the heating amount of the heater Refrigerator, characterized in that the control to reduce the. 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 the refrigerator comprising a heater for supplying a heater and a sensor for checking the position of the second tray,
Performing water supply of the ice making cell while the second tray is moved to a water supply position;
Performing ice making after the second tray is moved from the water supply position to the ice making position in the reverse direction after the water supply is completed; And
After completion of the ice making, moving the second tray from the ice making position to the ice making position in a forward direction,
The heater is turned on in at least a portion of the step in which the ice making is performed so that the bubbles dissolved in the water inside the ice making cell move toward the liquid water in the ice making portion to generate transparent ice,
At the ice making position of the second tray, a second signal is output from the sensor,
A first signal is output while the second tray moves from the ice making position to the water supply position,
The position of the second tray when the signal output from the sensor changes from the first signal to the second signal is set as a water supply position,
When the refrigerator is turned on after being turned off, the control unit controls the driving unit to move the second tray to the water supply position based on a signal output from the sensor. The method of claim 13,
When the second signal is output from the sensor when the refrigerator is turned on, the control unit moves the second tray in a set pattern. The method of claim 14,
Moving the second tray in a set pattern means moving the second tray in a reverse direction by A seconds and then moving the second tray by B seconds less than A seconds in a forward direction. The method of claim 14,
After the second tray is moved to a set pattern, when the first signal is output from the sensor,
The control unit moves the second tray in a forward direction until the second signal is output from the sensor,
After the second tray is further moved forward for C seconds at the time when the second signal is output from the sensor,
A method of controlling a refrigerator in which the second tray is stopped after moving the second tray in a reverse direction until the first signal is output from the sensor. The method of claim 14,
After the second tray is moved to a set pattern, if the first signal is output from the sensor, the control unit moves the second tray in the forward direction until the second signal is output from the sensor, and then the Control method of a refrigerator to stop the second tray. The method of claim 14,
After the second tray is moved to a set pattern, when the second signal is output from the sensor,
The control unit moves the second tray in the reverse direction until the first signal is output from the sensor,
When the first signal is output from the sensor, the second tray is moved in the reverse direction until the second signal is output from the sensor,
When a second signal is output from the sensor, the control unit moves the second tray in a set pattern again. The method of claim 14,
When the refrigerator is turned on, when the first signal is output from the sensor, the controller rotates the second tray in the reverse direction until the second signal is output from the sensor,
A method of controlling a refrigerator to move the second tray in a set pattern. 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 comprising a heater for supplying a heater, a sensor for checking a position of the second tray, and a controller for controlling the driving unit,
Turning on the refrigerator;
When a second signal is output from the sensor, the control unit moving the second tray in a set pattern;
When the first signal is output from the sensor, moving the second tray in a reverse direction until the second signal is output from the sensor and then moving the second tray in a set pattern; And
After moving the second tray in a set pattern, when the first signal is output from the sensor, moving the second tray to a water supply position,
The water supply position of the second tray is set to a position different from the ice-making position, and the second tray is rotated in a forward direction from the water supply position to move to the ice-making position. The method of claim 20,
The step of moving the second tray in a set pattern,
Moving the second tray in the reverse direction by A seconds,
And moving the second tray in a forward direction by B seconds less than A seconds. The method of claim 21,
Moving the second tray to the water supply position,
Moving the second tray in a forward direction until the second signal is output from the sensor;
Additionally moving the second tray forward for C seconds at the time when the second signal is output from the sensor; And
And stopping the second tray after moving the second tray in a reverse direction until a first signal is output from the sensor. The method of claim 21,
In the step of moving the second tray to a water supply position, the second tray is stopped after moving the second tray in a forward direction until the second signal is output from the sensor.

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