KR100231150B1 - Method and apparatus for control of ice rejecting mode in the auto ice maker - Google Patents

Abstract

The present invention relates to a method and an apparatus for controlling an ice mode of an automatic ice maker.

Conventional automatic ice makers are to control the ebbing mode of the tray using a horizontal switch, an ice switch and a plurality of ribs attached to the cam gear to control the switching state of each switch. Therefore, a malfunction occurs due to a poor mechanical contact, and a problem that parts replacement and repair work are difficult due to a complicated mechanical structure.

The present invention relates to a method of controlling an ice maker of an automatic ice maker by repeatedly rotating an ice motor in a forward direction and a reverse direction, wherein the ice driving mode is detected by detecting a motor driving voltage level for rotating the ice motor in a predetermined direction. A method of controlling an ice maker mode of an automatic ice maker that stops the ice motor when the motor driving voltage level is lower than the reference voltage.

In addition, the automatic ice making machine is capable of forward rotation and reverse rotation, and including an ice motor for rotating the tray in a predetermined direction by receiving a drive voltage, the automatic ice maker comprising: a voltage sensing unit for detecting a drive voltage level applied to the ice motor; And a microcomputer for comparing the driving voltage level detected by the voltage sensing unit with a preset reference voltage level and controlling the driving state of the moving motor according to the result.

Description

TECHNICAL AND APPARATUS FOR CONTROL OF ICE REJECTING MODE IN THE AUTO ICE MAKER}

The present invention relates to a method and an apparatus for controlling an ice mode of an auto ice maker, and more specifically, to remove a rib structure attached to a horizontal switch and a cam, and a voltage applied to the ice motor. The present invention relates to a method and an apparatus for controlling an ice maker mode of an automatic ice maker, which further includes a voltage sensing circuit for detecting a value to determine an initial horizontal state and an ice state (maximum torsion state) of a tray.

In general, an automatic ice maker is installed in a freezer compartment of a refrigerator to automatically supply ice making water to a tray and check the ice making state, and when ice making is completed, the ice making machine is automatically removed from the tray and loaded into the ice making machine. As it is very convenient because there is no need for a user's separate operation for operation, it has recently become an essential component of a refrigerator.

The conventional automatic ice maker will be described with reference to FIGS. 1 to 3 as follows.

Figure 1 is a schematic block diagram showing a conventional automatic ice maker.

1, a power supply unit 1 for supplying a driving voltage in an automatic ice maker, a tray position detection unit 2 for detecting a current position of a tray (not shown), and a refrigerator so that a user can select an automatic ice making function. A function selection unit 3 mounted on an outer surface of the control panel and listing a plurality of function keys; an ice motor rotation control unit 5 for controlling the rotation state of the ice motor 4; and a water supply motor for supplying ice-making water to the tray. Water supply motor rotation control unit 7 for controlling the rotation state of the (6), an ice determination unit (8) mounted on the lower end of the tray to check the ice state, and a microcomputer (9) for controlling the above-described components Consists of.

Meanwhile, referring to FIG. 2, the detailed mechanical structure of the automatic ice maker will be described. An ice motor 4 is mounted in the case 10 of the automatic ice maker, and a worm gear is installed on the shaft extended from the ice motor 4. (11) is provided. In addition, the worm gear 11 is configured such that the first to third gears 12 to 14 are sequentially engaged so that the rotational force of the worm gear 12 is sequentially transmitted from the first gear 12 to the third gear 14. have. In addition, the cam gear 15 is engaged with the third gear 14 so that the cam gear 15 is interlocked according to the rotational force of the third gear 14.

In addition, on one side of the outer circumferential surface of the cam gear 15, a damage preventing protrusion 17 protrudes from the outer circumferential surface of the cam gear 15 so as to prevent the tray 16 from being over rotated and damaged. When the motor is returned to the initial horizontal state, the horizontal stopper 18 is formed at a predetermined position of the case 10 so as to come into contact with the breakage preventing protrusion 17, so that the cam gear is caused by the breakage preventing protrusion 17 and the horizontal stopper 18 contacting with each other. (15) is configured to prevent rotation further in the counterclockwise direction.

In addition, when the tray 16 is rotated by about 158 °, the ice stopper 19 is attached to one side of the ice motor 4 so as to contact the damage preventing protrusion 17 attached to the outer circumferential surface of the cam gear 15. The cam gear 15 is no longer rotated in the clockwise direction due to the contact between the prevention protrusion 17 and the moving stopper 19.

On the other hand, the lower side of the cam gear 15 is provided with a horizontal switch 20 to detect the initial horizontal state of the tray 16, the horizontal switch 20 is a horizontal switch attached to the cam gear 15 The switching ribs are configured to control the switching state.

In addition, when the lever connector 24 is mounted at the point adjacent to the horizontal switch 20 and the lever lever 24 is attached to the cam gear 15, the lever connector 24 is pressed. The ice level lever 26 integrally formed in 24 is rotated to turn on the ice level switch 22. At this time, the ice level lever 25 is controlled to rotate the ice level lever 26 according to the ice load of the ice container (not shown) accommodated in the lower portion of the automatic ice maker.

On the other hand, at a lower predetermined position of the tray 16, an ice sensor (herein, 'thermistor' is used) to detect a temperature change of the tray 16 and determine an ice making state and an ice state. Is equipped. The ice sensor 26 is installed in the above-described ice determination unit 8 of FIG. 1 to check the variation of the voltage value according to the temperature change of the ice sensor 26 to determine the ice and ice state.

The operation of the conventional automatic ice maker having the above-described configuration will be described with reference to FIG. 3 as follows.

When the user operates the automatic ice making function selection key among the plurality of function keys arranged in the function selecting section 3 to select the automatic ice making function, this operation signal is applied to the microcomputer 9. At the same time, the driving voltage generated in the power supply unit 1 is supplied to the microcomputer 9 and other components, respectively.

The microcomputer 9 outputs a control signal to the feed water motor rotation control unit 5 according to the control signal applied from the function selection unit 3 to drive the feed water motor 6. Accordingly, although not shown, the ice making water stored in the water supply tank stored at a predetermined position of the refrigerating compartment is supplied to the tray 16 of the freezer compartment through the water supply hose by a predetermined amount. At this time, since the tray 16 is maintained in the initial horizontal state as shown in Figure 3a, the horizontal switch 21 is located in the concave portion of the horizontal switch adjustment rib 21 attached to the cam gear 15 ' Maintain Off state. In addition, since the lever connector 24 is located in the recess of the ice lever adjusting rib 23 attached to the cam gear 15, the lever connector 24 is not pressed, and thus the ice lever 25 is not rotated. Thus, the ice level switch 22 is maintained in the 'off' state. Here, the microcomputer 9 checks that the horizontal switch 20 and the ice level switch 22 are each off to determine that the current position of the tray 16 is the initial horizontal state.

Thereafter, the microcomputer 9 checks whether the ice making is completed by the ice making unit 8, and when the ice making is completed, outputs a control signal to the ice motor rotation control unit 5 to move the ice motor 4 in a predetermined direction. (Here, it is set to 'clockwise') (see FIG. 3B). As the moving motor 4 is rotated, the horizontal switch adjustment rib 21 attached to the cam gear 15 is rotated, and the horizontal switch 20 is positioned on the convex portion of the horizontal switch adjustment rib 21 so that it is turned on. On) 'state. In addition, since the lever connector 24 is located at the convex portion of the ice lever adjusting rib 23 attached to the cam gear 15, the lever connector 24 is pressed, and the ice lever adjusting rib 23 is rotated accordingly. The ice switch 22 is switched to the 'on' state. At this time, the microcomputer 9 checks that the horizontal switch 20 and the ice level switch 22 are 'on' states, and determines that the automatic ice maker is set to the ice making state.

Then, as the moving motor 4 further rotates from the ready state of the ice, the horizontal switch adjustment rib 21 attached to the cam gear 15 rotates, and the horizontal switch 20 of the horizontal switch adjustment rib 21 is rotated. Because it is located in the recess, it is switched to the 'off' state. In addition, since the lever connector 24 is still located in the convex portion of the ice lever adjusting rib 23, the lever connector 24 is kept pressed and the ice switch 22 is kept in an 'on' state. do. At this time, the microcomputer 9 checks that the horizontal switch 20 is in an 'off' state and checks that the ice switch 22 is in an 'on' state to determine that the automatic ice maker is set to an ice state. . Thus, the microcomputer 9 controls the moving motor rotation control unit 5 to stop the moving motor 4. Here, when the upper end of the tray 16 faces the ice making container before the tray 16 is stopped by the microcomputer 9, one side of the tray 16 is caught on a step and no longer rotates, and the tray ( The other side of 16 is continuously rotated by the moving motor 4 so that the tray 16 is distorted (see FIG. 3C).

Accordingly, the iced ice is separated from the tray 16 and loaded into the ice making container. Then, when it is determined that the ice removal operation is completed by the control signal detected from the ice making determination unit 8, the microcomputer 9 rotates the ice motor. The controller 5 is controlled to rotate the moving motor 4 in a direction opposite to the initial rotation direction (here, set to the counterclockwise direction). Accordingly, the horizontal switch 20 is located in the convex portion of the horizontal switch adjustment rib 21 mounted on the cam gear 15 to be turned on, and the lever connector 24 is the ice lever. Since it is located in the convex portion of the adjustment rib 23, the 'On' state is maintained continuously. At this time, the microcomputer 9 checks that the horizontal switch 20 and the ice level switch 22 are 'on' states, and determines that the automatic ice maker is set to the return state.

Thereafter, as the moving motor 4 continues to rotate, the horizontal switch 20 and the ice level switch 22 are positioned at the recesses of the horizontal switch adjustment rib 21 and the ice lever adjustment rib 23, respectively. 20 and the ice level switch 22 are switched to the 'off' state. At this time, the microcomputer 9 determines whether the automatic ice maker has returned to its initial state by checking whether the horizontal switch 20 and the ice level switch 22 are 'turn-off', respectively, and then the ice motor rotation control unit (5) is controlled to stop the moving motor (4). Thus, the automatic ice maker returns to the initial state (see FIG. 3D).

Thereafter, when it is determined that the automatic ice maker returns to the initial state, the microcomputer 9 repeatedly performs the above-described automatic ice making operation.

However, in the conventional automatic ice maker as described above, the plurality of ribs 21 and 23 attached to the cam gear 15 come into contact with the horizontal switch 20 and the ice switch 22 to switch the switching state. By doing so, the mechanical failure rate of contact is high, thereby causing a problem in the automatic ice maker malfunctioning.

In addition, a cam gear having a plurality of ribs 21 and 23 for controlling the horizontal switch 20 and the ice switch 22 and their switching states in order to determine the initial horizontal state and the ice state of the tray 16. Since 15) must be provided, there is a problem that the configuration is complicated.

In addition, due to the complicated configuration, there is a problem in that repair and replacement parts are difficult in case of malfunction or failure of the automatic ice maker.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to determine the initial horizontal state and the ice state (maximum torsion state) of a tray using a simple voltage sensing circuit without using a mechanical switch. The present invention provides a method of controlling an ice-making mode of an automatic ice maker.

In addition, another object of the present invention is to remove the plurality of ribs mounted on the mechanical switch and the cam gear, and to further configure the voltage sensing circuit, the structure is simple, the failure rate is reduced, easy repair and replacement parts The present invention provides a method of controlling an ice-making mode of an automatic ice maker.

In addition, another object of the present invention to provide an ice-making mode control apparatus of an automatic ice maker for achieving the above objects.

1 is a schematic block diagram of an automatic ice maker according to the prior art,

2 is a detailed structural diagram of an automatic ice maker according to the prior art,

3a to 3d is an operating state diagram of the automatic ice maker shown in FIG.

4 is a schematic block diagram of a ribbing mode control apparatus for an automatic ice maker according to the present invention;

5 is a detailed circuit diagram of the moving motor rotation control unit and the moving motor and voltage sensing unit shown in FIG.

6 is a detailed structural diagram of an automatic ice maker according to the present invention;

7a and 7b is an operating state of the automatic ice maker according to the present invention,

8 is a flowchart illustrating the operation of the microcomputer for performing the method of controlling the ice maker according to the present invention.

<Description of the symbols used in the main parts of the drawing>

4: moving motor 5: moving motor rotation control unit

15: Camgear 16: Tray

17: Breakage prevention protrusion 18: Horizontal stopper

19: moving ice stopper 27: voltage detection unit

28: microcomputer 29: forward voltage detection unit

30: reverse voltage detection unit 31: forward amplification buffer

32: forward reverse voltage protection diode 33: forward inverter

34: reverse amplification buffer 35: reverse reverse voltage prevention diode

36: reverse inverter R1 to R6: voltage divider resistance

C1, C2: coupling capacitor

A feature of the present invention for achieving the above object is a method of controlling an ice maker mode of an automatic ice maker to perform an automatic ice making operation by repeatedly rotating an ice motor in a forward direction and a reverse direction: rotating the ice motor in a predetermined direction And a method of controlling an ice maker of an automatic ice maker to stop the moving motor when the detected motor driving voltage level is less than a reference voltage.

In the above-described feature of the present invention, when the automatic deicing function is selected or the completion of the ice, the moving motor is reversely rotated, and the voltage applied to the moving motor is detected to detect the voltage applied to the moving motor and the moving motor A first step of stopping; And a second step of rotating the moving motor forward and stopping the moving motor when the detected voltage is less than the reference voltage when ice making is completed, and detecting the voltage applied to the moving motor. It is preferable to repeatedly perform the second step.

In addition, after performing the first step, it is preferable to further include the step of forward rotation of the moving motor for a predetermined time in order to relax the stress of the reversely rotated moving motor.

In addition, after performing the second step, it is preferable to further include the step of waiting for a predetermined time in the state in which the ice motor is stopped so that the iced ice is separated.

On the other hand, another feature of the present invention, the automatic ice making machine that can be rotated forward and reverse, and including a moving motor for applying a driving voltage to rotate the tray in a predetermined direction: detecting the driving voltage level applied to the moving motor A voltage sensing unit; And a microcomputer comparing the driving voltage level sensed by the voltage sensing unit with a preset reference voltage level and controlling the driving state of the moving motor according to the result.

In another aspect of the present invention, the voltage sensing unit, a plurality of voltage divider for dividing the voltage applied to the ice motor; And a coupling capacitor connecting the plurality of divided resistors and the microcomputer.

The microcomputer stops the moving motor when the driving voltage detected by the voltage sensing unit is less than the reference voltage, and sets the moving motor when the driving voltage detected by the voltage sensing unit is greater than or equal to the reference voltage. It is preferable to be set to rotate.

Hereinafter, a method of controlling an ice making mode of an automatic ice maker and a device according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a schematic block diagram of a ribbing mode control apparatus for an automatic ice maker according to the present invention. In Fig. 4, the same reference numerals as in Fig. 1 denote the same parts.

4, a power supply unit 1 for supplying a driving voltage in the automatic ice maker, a function selection unit 3 mounted on an outer surface of the refrigerator and listing a plurality of function keys so that a user can select an automatic ice making function, An ice motor rotation control unit 5 for controlling the rotation state of the motor 4, a voltage sensing unit 27 for sensing a voltage applied to the ice motor 4 to detect the present state of the tray, and an ice-making water in the tray. A water supply motor rotation control unit 7 for controlling the rotational state of the water supply motor 6 for supplying water, and an ice determination unit 8 mounted at the lower end of the tray to check an iced state (maximum torsional state); It consists of the microcomputer 28 which controls each structure part. Here, since the present state of the tray is determined by using the voltage detecting unit 27, the conventional tray position detecting unit 2 is removed.

Meanwhile, referring to FIG. 5, a detailed configuration of the moving motor rotation control unit 5, the moving motor 4, and the voltage sensing unit 27 will be described.

First, the moving motor rotation controller 5 is divided into a forward rotation controller 29 and a reverse rotation controller 30, and the forward rotation controller 29 is a 5-volt (V) motor driving output from the microcomputer 28. A forward amplification buffer 31 for amplifying the voltage to a motor driving voltage of 12 volts (V) and a driving voltage of 12 volts (V) amplified by the forward amplifying buffer 31 are supplied to the moving motor 4 in the forward direction. Forward reverse voltage prevention diode 32 and the forward inverter to invert the motor driving voltage of 5 volts (V) output from the microcomputer 28 to form a loop for driving the moving motor 4 in the forward direction ( 33).

In addition, the reverse rotation controller 30 amplifies the motor driving voltage of 5 volts (V) output from the microcomputer 28 to the motor driving voltage of 12 volts (V) in the same manner as the configuration of the forward rotation control unit 29. The reverse amplification buffer 34, a reverse reverse voltage prevention diode 35 for supplying a driving voltage of 12 volts (V) amplified by the reverse amplification buffer 34 to the moving motor 4 in a forward direction, and a microcomputer. It consists of the reverse inverter 36 which inverts the motor driving voltage of 5 volts (V) output from (28) to form a loop for driving the moving motor 4 in the reverse direction.

In addition, the voltage sensing unit 27 is mounted on the output terminals of the forward amplification buffer 31 and the reverse amplification buffer 34, respectively, and has a plurality of voltage divider resistors R1 to R6 and a coupling capacitor (Coupling Capacitor) ( It consists of RC connection circuit composed of C1 and C2, and is configured to detect a change in voltage value according to the amount of current flowing through each of the amplification buffers 31 and 34. At this time, the voltage value detected by the voltage sensing unit 27 is output to the voltage sensing terminal (not shown) of the microcomputer 28 to adjust the horizontal and ice state (maximum torsion state) of the tray according to the detected voltage value. It is configured to judge.

In addition, referring to the structure of the automatic ice maker according to the present invention shown in FIG. 6, the horizontal switch 20 is removed from the above-described components of FIG. 2, and at the same time, a plurality of ribs attached to the cam gear 15 ( 21 and 23 all have the configuration removed.

The operation of the present invention having the above-described configuration will be described with reference to FIGS. 7 and 8 as follows.

When the automatic de-icing function is initially selected (S1), the microcomputer 28 supplies the motor driving voltage to rotate the ice motor 4 in the reverse direction (S2). This is to prevent the tray from malfunctioning when the tray does not maintain the normal initial horizontal state due to a breakdown or failure of the automatic ice maker. The motor driving voltage of 5 volts (V) output from the microcomputer 28 is reversed. After amplification to 12 volts (V) by the amplification buffer 34 is supplied to the moving motor (4) through the reverse reverse voltage prevention diode (35). Accordingly, the ground terminal of the moving motor 4 is subjected to a voltage of -5 volts (V) by the reverse inverter 36, and reverse flow is reversed by the reverse reverse voltage prevention diode 35, so that the reverse amplification is performed. The loop of the buffer 34 → reverse reverse voltage prevention diode 35 → the moving motor 4 → the reverse inverter 36 is formed, which causes the moving motor 4 to rotate in the reverse direction so that the tray 16 is initially leveled. Switch to the state.

At this time, the microcomputer 28 compares whether the voltage at the 'B' point is less than the reference voltage (S3). Here, in the state in which the moving motor 4 is normally driven, the 'B' point of the voltage sensing unit 27 is applied with a voltage equal to or greater than a preset reference voltage. For example, the voltage divider resistor R4 is set to 12 kiloohms, the voltage divider resistor R5 is set to 10 kiloohms, and the voltage divider resistor R6 is set to 1 kiloohm. If the coupling capacitor C2 is set to 0.0001 picofarads, the voltage across point 'B' is greater than 4.8 volts (V). Therefore, when a voltage of 4.8 volts (V) or more is detected from the point 'B', the microcomputer 28 returns to the above-described step 2 (S2) because the moving motor 4 is normally driven. ) Repeat all subsequent steps.

Then, when the tray 16 returns to the initial horizontal state, as shown in FIG. 7A, the break preventing protrusion 17 and the horizontal stopper 18 of the cam gear 15 come into contact with each other, and the moving motor 4 is no longer provided. It cannot be rotated, and thus the current value flowing through the ice motor 4 is increased. As a result, since the amount of current flowing through the voltage sensing unit 27 decreases, the voltage applied to the point 'B' of the voltage sensing unit 27 drops below the reference voltage. When the dropped voltage is applied to the microcomputer 28, the microcomputer 28 senses that the voltage is less than the reference voltage and determines that the moving motor 4 is returned to the initial horizontal state, and is supplied to the moving motor 4. The motor driving voltage is cut off to stop the moving motor 4 (S4). Thus, the tray 16 maintains the initial horizontal state.

Thereafter, the microcomputer 28 supplies the motor driving voltage to the moving motor 4 for a predetermined time to alleviate the stress of the cam gear 15, thereby rotating the moving motor 4 for a predetermined time in a forward direction (S5). Here, it is preferable to set predetermined time to about 0.5 second.

On the other hand, the microcomputer 28 checks whether the ice making is completed through the ice making unit 8 (S6), and when it is determined that ice making is completed, the microcomputer 28 rotates the motor to the ice motor 4 to rotate the ice motor 4 forward. Supply the driving voltage. The motor driving voltage of 5 volts (V) output from the microcomputer 28 is amplified to 12 volts (V) by the forward amplification buffer 31 and then through the forward reverse voltage prevention diode 32 to the moving motor 4. Supplied to. Accordingly, the ground terminal of the moving motor 4 is subjected to a voltage of -5 volts (V) by the forward inverter 33, so that the forward amplification buffer 31 → the forward reverse voltage prevention diode 32 → the moving motor ( 4) → the loop of the forward inverter 33 is formed, thereby the ice motor 4 is rotated in the forward direction to switch the tray 16 to the ice state (maximum torsion state) (S7).

At this time, the microcomputer 28 compares whether the voltage at the 'A' point is less than the reference voltage (S8). Here, in a state in which the moving motor 4 is normally driven, a voltage equal to or higher than a preset reference voltage is applied to the 'A' point of the voltage sensing unit 27. At this time, the reference voltage is equal to the case of detecting the voltage value at the 'B' point in the voltage sensing unit 27 described above, and each of the divided voltage resistors R1 to R3 is 12 kilo ohms and 10 kilo ohms. ㏀ and 1 kilo ohm, and the coupling capacitor (C1) is set to 0.0001 picofarad (㎊) is 4.8 volts (V). The reference voltage can be arbitrarily set by adjusting the values of the divided resistors R1 to R3 and the coupling capacitor C1. Therefore, when a voltage of 4.8 volts (V) or more is detected from the 'A' point, since the moving motor 4 is normally driven, the microcomputer 28 returns to the above-described step 7 (S7) and the step 7 (S7). ) Repeat all subsequent steps.

Subsequently, when the tray 16 is switched to the icing state (maximum torsion state), the break preventing protrusion 17 of the cam gear 15 and the driving stopper 19 come into contact with each other as shown in FIG. 7B. ) Is no longer rotated, and thus the current value flowing through the ice motor 4 is increased. As a result, since the amount of current flowing through the voltage sensing unit 27 decreases, the voltage applied to the point 'A' of the voltage sensing unit 27 drops below the reference voltage. When the dropped voltage is applied to the microcomputer 28, the microcomputer 28 detects a voltage less than the reference voltage and determines that the moving motor 4 is in the moving state (maximum torsion state). The motor driving voltage supplied to 4) is cut off to stop the moving motor 4 (S9). Thus, the tray 16 is kept in an iced state (maximum torsion state).

Thereafter, the microcomputer 28 waits for a predetermined time (in this case, it is set to '2 seconds') so that the iced ice is completely separated from the tray 16 (S10), and then returns to the aforementioned step 2 (S2). By repeating all the processes after Step 2 (S2), it is possible to continuously perform the automatic ice making operation of the automatic ice maker.

Accordingly, a simple voltage sensing unit (11.23) mounted on the horizontal switch 20, the ice level switch 22, and the cam gear 15 is not required to detect the current position of the tray 16. 27, it is possible to determine the current position of the tray 16.

After all, according to the method and the apparatus of the automatic ice maker according to the present invention, by adding a simple voltage sensing circuit to determine the initial horizontal state and the ice state (maximum torsion state) of the tray, a plurality of attached to the cam gear Due to the manner in which the two ribs are in contact with the horizontal switch and the ice level switch, there is an advantage of preventing malfunction of the automatic ice maker due to mechanical contact failure.

In addition, since a plurality of ribs attached to the horizontal switch and the cam gear can be removed, the configuration thereof is simplified, the defect rate is reduced, and repair and replacement of parts are easy.

Claims (5)

In the method of controlling the ice maker mode of the automatic ice maker which performs the automatic ice making operation by repeatedly rotating the ice motor in the forward and reverse directions: Determining whether an automatic ice making function is selected; If it is determined that the automatic ice making function is selected, rotating the ice motor in a reverse direction; Detecting a first voltage applied to the moving motor; Determining whether the first voltage detected in the detecting step is an overvoltage state higher than a preset reference voltage; Stopping the moving motor if the first voltage is an overvoltage as a result of the determination; Determining whether the ice making operation is completed; If it is determined in the determining step that the ice making operation is completed, rotating the ice motor forward; Detecting a second voltage applied to the moving motor; Determining whether the second voltage detected in the detecting step is an overvoltage higher than the preset reference voltage; And Stopping the moving motor if the second voltage is an overvoltage as a result of the determination; And a step of repeatedly moving the moving motor from the reverse rotation of the moving motor to stopping the rotating state of the moving motor in the forward direction until the automatic ice making function is released. According to claim 1, After the step of stopping the state in which the moving motor is rotated in the reverse direction, And rotating the moving motor forwards for a predetermined time to alleviate the stress of the moving motor rotated in the reverse direction. According to claim 1, After the step of stopping the state in which the moving motor is rotated in the forward direction, And a step of waiting for a predetermined time in the state in which the ice motor is stopped to separate the iced ice. In an automatic ice maker including a moving motor capable of forward rotation and reverse rotation and receiving a driving voltage to rotate a tray in a predetermined direction: A voltage sensing unit connected between the moving motor and a driving voltage supply source to sense a driving voltage level applied to the moving motor; And A microcomputer controlling a driving state of the moving motor according to the driving voltage level sensed by the voltage sensing unit; When the automatic deicing function is selected, the microcomputer rotates the moving motor in the reverse direction, detects a third voltage applied to the moving motor through the voltage detection unit, and the detected third voltage is higher than a preset reference voltage. When the overvoltage stops the moving motor, and when the ice making operation is completed, the moving motor rotates forward, detects a fourth voltage applied to the moving motor through the voltage detector, and detects the fourth voltage based on the preset reference voltage. If the over-voltage is higher than the voltage, the ice motor is stopped, and the ice-making mode control apparatus of the automatic ice maker characterized in that the steps are repeatedly performed until the automatic ice making function is released. The method of claim 4, wherein the voltage sensing unit, A plurality of voltage divider resistors for dividing the voltage applied to the moving motor; And A coupling capacitor connecting the plurality of voltage divider and the microcomputer; If the voltage value divided by the plurality of voltage divider resistance is a voltage value lower than a predetermined level, it determines that the voltage applied to the ice motor is an overvoltage.

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