KR102055832B1 - Ice maker and refrigerator including the same - Google Patents

Abstract

Control box; A motor unit provided in the control box and generating rotational power; A gear group including one or more gears having a transmission ratio to which the rotational power of the motor unit is transmitted and the rotational speed by the rotational power is shifted, and an output gear that is linked with the one or more gears and transmits the rotation shifted out of the control box; And an ice tray having one side connected to the connecting shaft extending from the output gear of the gear group and being rotated by the final rotational speed transmitted by the output gear, wherein the rotation angle of one side is larger than the rotation angle of the other side. The output gears receive the rotational power of the motor unit through one or more gears, and first gears and second gears formed of different modules are formed to be rotated through two speed ratios during rotation. The second gear is provided with an ice maker, which is formed in different predetermined rotation sections.

Description

ICE MAKER AND REFRIGERATOR INCLUDING THE SAME}

The present invention relates to an ice maker and a refrigerator including the same.

In general, a refrigerator includes a main body having a refrigerating compartment for storing food and a freezing compartment for freezing food, and a rear side of the main body is provided with a compressor for compressing a refrigerant and a heat exchanger for generating cold air. The cold air generated from the heat exchanger is supplied to the inside of the refrigerating compartment or the freezing compartment by the fan, and the air whose temperature is raised by circulating the refrigerating compartment or the freezing compartment is supplied to the refrigerating compartment or the freezing compartment through the heat exchanger to always keep fresh food stored in the refrigerating compartment or the freezing compartment. It can be kept in a state. At this time, an ice maker for manufacturing ice is installed in the freezing compartment or the refrigerating compartment.

The ice maker provided in the refrigerator automatically supplies water to the ice making container and checks the ice making state, and when the ice making is completed, the ice making machine is automatically removed from the ice making container to be loaded into the ice storage container, and the user for the ice making operation. It is widely used recently because ice can be obtained without a separate operation.

Such ice makers are of a type including an ejector and a heater to twist ice, and a type of twisting a tray. The energy efficiency is higher than the type including the ejector and the heater since the ice maker of the tray twist type does not use a heater. In the type of twisting the tray, it is necessary to twist the tray and return it to its original position, so it is necessary to rotate the tray as well as reverse rotation. For this purpose, the motor uses a direct current (DC) motor. Conventionally, a brush motor has been used as a direct current motor for a long time.

However, dust is generated over time in the brush formed of carbon used in the brush motor. For this reason, the life of the brush motor itself is limited, and dust contamination occurs around the brush motor (inside the refrigerator). In addition, the noise and vibration generated by the brush motor itself is severe, causing discomfort to the user during operation. In addition, the amount of current consumed during the operation of the brush motor is high and the heat generated by the brush motor is high, resulting in lower energy efficiency. In addition, as the driving force of the motor is uniformly transmitted during the twisting of the ice tray, the ice making process is not efficiently performed .

Republic of Korea Patent Publication No. 10-1366559 (2014. 02. 26)

One embodiment of the present invention is to provide an ice maker that can effectively apply the power of the motor to the ice by dividing the rotating section of the ice tray rotated by the motor into a high-low torque and low-speed torque section do.

An embodiment of the present invention is to distinguish the rotation section of the ice tray rotated by the motor, forming a coupling section of the gear by a predetermined section by the combination of the two gears ice machine that can efficiently provide power of the motor to the ice The purpose is to provide.

An embodiment of the present invention provides a refrigerator including an ice maker which can efficiently apply the power of the motor to the ice by dividing the rotating section of the ice tray rotated by the motor into a high-low torque and a low-high torque section. It aims to do it.

An embodiment of the present invention is to distinguish the rotation section of the ice tray rotated by the motor, forming a coupling section of the gear by a predetermined section by the combination of the two gears ice machine that can efficiently provide power of the motor to the ice It is an object to provide a refrigerator comprising a.

Control box; A motor unit provided in the control box and generating rotational power; A gear group including one or more gears having a transmission ratio to which the rotational power of the motor unit is transmitted and the rotational speed by the rotational power is shifted, and an output gear that is linked with the one or more gears and transmits the rotation shifted out of the control box; And an ice tray having one side connected to the connecting shaft extending from the output gear of the gear group and being rotated by the final rotational speed transmitted by the output gear, wherein the rotation angle of one side is larger than the rotation angle of the other side. The output gears receive the rotational power of the motor unit through one or more gears, and first gears and second gears formed of different modules are formed to be rotated through two speed ratios during rotation. The second gear is provided with an ice maker, which is formed in different predetermined rotation sections.

The motor unit may be arranged such that the motor shaft of the motor unit extends in the opposite direction to the connecting shaft of the output gear.

In addition, the motor shaft may be formed to be eccentric with the body of the motor unit.

And the motor portion is a geared stepping motor.

In addition, in the section in which the interlocked gears and the first gear are interlocked and rotated, the ice tray is rotated at a higher speed than the section in which the interlocked gears and the first gear are rotated. The ice tray may be rotated with a higher torque than the section rotated in conjunction with the gear.

In addition, the ice tray may be rotated when one side is rotated by the interlocking of the first gear and the second tooth, and the other side may be rotated only when the first gear is rotated by the interlocking of the first gear.

In addition, the ice tray may be formed of a resin material having elasticity.

In addition, the rotation range of the connecting shaft is 180 degrees or less, and a plurality of sections having different rotation speeds and torques within the rotation range of 180 degrees may be formed.

In addition, the rotation of the connecting shaft can be rotated forward or reverse by a predetermined angle, it can be operated in one cycle to be rotated back by the same angle.

In addition, one cycle may be performed for 90 to 120 seconds.

In addition, interlocked with the gear group may further include an ice detection lever which is operated through the rotational power of the fish group.

The apparatus may further include a correction capacitance sensor for detecting an amount of ice making water accommodated in the accommodation portion of the ice tray.

In addition, the gear that is interlocked with the output gear of the one or more gears in the gear group, a flow section for free rotation before and after the interlocking in the predetermined different rotation section may be formed.

In addition, the first gear may further include a display configured to display an origin in a rotation standby state in a state in which the first gear is interlocked.

In addition, by using different modules, a rotation section in which the torque of the linked output gear is increased and the rotation speed is decreased can be formed.

In addition, the second gear which is directly interlocked with the output gear, includes the 2-1 gear and the 2-2 gear, and the 2-1 gear is combined with the 2-2 gear by a predetermined angle around the same rotation axis Slide rotation is possible.

In addition, the predetermined angle may be 20 degrees.

A refrigerator is provided, comprising the ice maker as described above.

One embodiment of the present invention can provide an ice maker that can effectively apply the power of the motor to the ice by dividing the rotation section of the ice tray rotated by the motor into a high-low torque and low-speed torque section.

An embodiment of the present invention is to distinguish the rotation section of the ice tray rotated by the motor, forming a coupling section of the gear by a predetermined section by the combination of the two gears ice machine that can efficiently provide power of the motor to the ice Can be provided.

One embodiment of the present invention can provide an ice maker that can effectively apply the power of the motor to the ice by dividing the rotation section of the ice tray rotated by the motor into a high-low torque and low-speed torque section.

One embodiment of the present invention is to distinguish the rotation section of the ice tray rotated by the motor, by forming a coupling section of the gear by a predetermined section can be efficiently provided to the power of the motor by combining the two gears o A refrigerator including an ice maker may provide an ice maker.

1 is a cross-sectional view of an ice maker according to an embodiment of the present invention.
Figure 2 is a perspective view showing the arrangement of the gear group according to an embodiment of the present invention
Figure 3 is a side view showing the arrangement of the gear group according to an embodiment of the present invention
Figure 4 is a plan view showing the arrangement of the gear group according to an embodiment of the present invention
5 is a view showing a range in which the ice tray is rotated according to an embodiment of the present invention
6 is an exploded perspective view showing the structure of a second gear according to an embodiment of the present invention;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is only an exemplary embodiment and the present invention is not limited thereto.

In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for efficiently explaining the technical spirit of the present invention to those skilled in the art to which the present invention pertains.

In addition, the embodiments described below may include one or more of a control unit, a signal transmitter, a cross output unit, a signal receiver, a driver, and the like. Since the above configuration may serve as an aid in implementing the technical idea of the present invention, although not shown, the above description will be briefly described first and the present invention will be described in detail later.

In the above configuration, the control unit, the signal transmission unit and the cross output unit may be located at the refrigerator side, and the ice making unit 1 side may include a configuration such as a signal receiving unit and a driving unit. Since the control unit transmits a signal, that is, the signal transmitter and the cross output unit are located in the refrigerator, the controller may be the ice maker that receives the signal from the refrigerator.

1 is a cross-sectional view of an ice maker 1 according to an embodiment of the present invention.

Referring to FIG. 1, the ice maker 1 may be disposed in a space having a freezing temperature of the refrigerator. The ice maker 1 may include a driving unit 20 and an ice tray 30.

The ice tray 30 may include an accommodating part 31 accommodating the ice making water therein. A plurality of partitions are formed inside the ice tray 30 so that the accommodation part 31 may be divided into a plurality of spaces. The ice tray 30 may be formed with a temperature sensor unit (not shown) for measuring the temperature of the ice making water. In addition, a capacitive sensor (not shown) may be provided to detect the quantity of ice making water accommodated in the accommodating part 31.

The ice tray 30 may be formed of a resin material, and may be twisted by the rotation of the gear group 100 and then returned to its original shape.

Gear group 100 may be provided on one side of the ice tray (30). The gear group 100 may twist the ice tray 30 to ice the ice frozen in the ice tray 30. To this end, the gear group 100 may include a configuration for rotating the ice tray 30.

For example, the gear group 100 may include an output gear 130 connected to one or more gears and the ice tray 30. The one or more gears for shifting the rotational force transmitted from the motor unit 10 may be rotated by a predetermined section in engagement with the output gear 130. Here, the motor unit 10 may be a geared stepping motor. The geared stepping motor can be rotated by a constant angle every time a pulse signal is applied, and the rotation angle of the motor is proportional to the number of input pulse signals. Therefore, by controlling the input pulse, it is possible to precisely control the rotational angle of the motor and at the same time to shift.

When the motor unit 10 is a brush motor, the life of the brush formed of carbon is limited, and the surroundings of the motor are contaminated by carbon dust generated from the carbon brush. In addition, the noise and vibration generated in the brush motor is large, the current consumed when the brush motor is driven may be high. In addition, since the temperature generated by the brush motor is greatly increased, energy consumption may be large. In contrast, the stepping motor has a low current consumed by driving and a low noise and vibration during operation. In addition, the heat generated during the operation of the stepping motor is low and the energy efficiency is high. In addition, since there is no carbon brush, there is no contamination caused by carbon powder and wear does not occur, and thus life may be semipermanent.

The ice maker 1 may include a position sensor (not shown) for detecting a rotational position of the ice tray 30 by the motor unit 10. In this case, the rotation position may be a position at each end of the ice tray 30.

The gear group 100 may reduce the rotation speed of the rotation generated by the motor unit 10 and increase the torque. Conversely, it may increase the rotation speed and lower the torque. And, the gear group 100 is also connected to the ice sensor lever (not shown), not only twist the ice tray 30, but also of the ice generated in the ice maker 1 and stored in the ice storage unit (not shown) The operation of measuring the quantity can also be performed.

The control box 20 may accommodate the motor unit 10 and the gear group 100 therein, and a through hole (not shown) may be formed so that the output gear 130 may be connected to the ice tray 30. have. In addition, at least one of the light-emitting unit and the light-receiving unit for sensing the ice may be located at one side of the control box 20 to detect the ice of the ice stored in the ice storage container located under the control box 20. That is, the light emitting unit and / or the light receiving unit located at one side of the control box 20 may detect whether ice is full depending on the degree of reflection of light reflected on the ice.

The ice tray 30 may be twisted by the rotational force generated by the driving unit 20. In order for the ice tray 30 to be twisted, one side of the ice tray 30 may be stopped while being rotated by a predetermined rotation distance, and the other side of the ice tray 30 may be rotated more than the predetermined rotation distance. As such, the rotation distances at which both sides of the ice tray 30 rotate are different, so that the ice tray 30 may be twisted.

A motor controller (not shown) for controlling the motor unit 10 may be located in the ice maker 1 or in a refrigerator. When the motor controller is located in the ice maker 1, the motor controller may be located on a printed circuit board (not shown) disposed on one side of the motor unit 10. Since the motor unit 10 is a stepping motor, the motor control unit may control the motor unit 10 by receiving a control waveform. In addition, the position signal by the driving waveform of the motor unit 10 may be supplied to the motor control unit. Through this, the motor control unit can accurately control the rotation position of the motor unit 10. The motor controller may be a driver that generates a pulse signal for driving the motor unit 10.

The stepping motor as the motor unit 10 may be capable of both forward and reverse rotation. Therefore, it is possible to twist the ice tray 30 only by the motor unit 10 and to return it to its original position. However, the present invention is not limited thereto, and the twisting of the ice tray 30 may be performed by the motor unit 10, and the repositioning of the ice tray 30 again may include an elastic member (not shown) mounted on one side of the eye tray 30. May be used).

Furthermore, the ice maker 1 may further include the components of the signal transmitter, the cross output unit, the signal transmitter, and the drive described above with respect to the control. In detail, the signal transmitter included in the refrigerator may transmit an electric signal to drive the driver 20 according to the information included in the electric signal. The electrical signal received from the signal transmitter may be transferred to the signal receiver by the cross output unit. The direction in which the signal is transmitted may determine operation information of the driver to which the electrical signal is finally transmitted to the electrical signal.

Furthermore. The information included in the electrical signal received from the refrigerator may be delivered in different pulses per secomd (pps) when the electrical signals are transmitted in the form of pulses so that each pps (pulse per secomd) may include specific information. As an example, when delivered at 180pps, the driving unit may be driven in reverse rotation when delivered at 500pps forward. In addition to the information related to the rotation direction as described above, it may be information including the rotation angle and torque.

In the case of digital signals such as 0, 1, -1, and the like, the rotation speed, the rotation direction, the rotation angle, and the torque may be determined as a result of the signal combination transmitted for each of the plurality of signal lines. That is, the electrical signal may be of bipolar type. Of course, it may be a unipolar type. For example, even in the case of digital signals that are signals of 1 and 0, the rotation speed, the rotation direction, the rotation angle, and the torque may be determined through the combination of the respective signals. That is, one or more of bipolar and unipolar may be applied to the electrical signal.

The electrical signal transmitted from the cross output unit included in the refrigerator may be received by the signal receiver and transmitted to the driver. The driving unit may be driven by receiving the electric signal. Here, the driving unit, the drive and the drive motor may be included. The drive may produce rotation information in which the motor unit 10 is rotated by transmitting information for driving the motor unit 10. Here, the production may be based on a predetermined rule as a process of interpreting the information included in the previously received electrical signal, and the predetermined rule corresponds to the contents described for the information included in the above-described electrical signal.

When rotation information for rotating the motor unit 10 is produced in the drive, the rotation information is transmitted to the motor unit 10, and the driving motor may be driven corresponding to the predetermined rotation information. At this time, the power to rotate the motor unit 10 may be supplied by a power line separately from the outside. For example, the voltage for transmitting the electrical signal may be 5V, and the voltage for driving the motor unit 10 may be 12V. The power line may be connected to a driving unit to transmit power. That is, the power may be transmitted by being connected to a drive or a driving motor.

The transmitted power may rotate the motor unit 10 and rotate one side of the ice tray 30 connected to the shaft of the driving unit 10. One side portion of the ice tray 30 is connected to the motor unit 10 is rotated together with the whole of the light in accordance with the rotation of the motor unit 10, the other side may be rotated together by a predetermined section to be caught by a stopper (not shown). The predetermined section corresponds to a smaller range than the entire section, and since the predetermined section except for the entire section always rotates only one side of the ice tray 30, the ice tray 30 may be twisted. . When the ice tray 30 receives ice-making water and is disposed at subzero temperatures, the ice tray 30 may be twisted to ice the ice tray when the ice tray is changed to ice.

Thus, the ice tray 30 is twisted for ice making, at which time the motor unit 10 can be driven to twist the ice tray 30, and the motor unit 10 is rotated by a drive based on an electric signal. Information can be produced and delivered. That is, in the present embodiment, the electric signal to be the rotation information is determined by the selective transmission of the cross output unit, so that the ice can be performed.

Of course, the present invention is not limited thereto, and some of the components may not be included, and thus the motor unit 10 may be rotated by varying a transmission method of the electric signal and the rotation signal.

2 is a perspective view showing the arrangement of the gear group 100 according to an embodiment of the present invention.

Referring to FIG. 2, the gear group 100 may include a first gear 110, a second gear 120, and an output gear 130. In this example, the shift configurations included in the gear group 100 are the three configurations, but this is only one example, and may include one or more shiftable gears.

In detail, the first gear 110 may include the first-first gear 111 and the first-second gear 112. The first-first gear 111 is a gear included in the gear group 100 to which the rotational power of the motor unit 10 is initially transmitted, and a pitch circle may be formed larger than the first-second gear 112. . Of course, since the 1-1 gear 111 and the 1-2 gear 112 have the same rotation center axis, the rotational power of the motor unit 10 transmitted to the 1-1 gear 111 is 1- 1. The reduced rotational speed transmitted to the second gear 112 may be transmitted to the second gear 120.

The rotational power transmitted to the second-first gear 121 of the second gear 120 may be transmitted to the output gear 130. Here, the output gear 130 may be rotated by the combination of the second-first gear 121 and the first gear 131. The second gear 120 includes a 2-1 gear 121 and a 2-2 gear 122, the pitch circle of the 2-2 gear 122 is the pitch of the 2-1 gear 121 It is formed smaller than a circle and the center of rotation may be the same.

The first gear 131 is not all formed in the 360 degree direction based on the rotational center axis of the output gear 130, but may be a predetermined section. Therefore, the output gear 130 may be rotated by the combination of the second gear 121 and the first gear 131 by a predetermined section of the rotation section of the output gear 130.

The second gear 132 and the second-second gear 122 included in the output gear 130 after the predetermined section rotated by the interlocking of the first gear 131 and the second-first gear 121. ), The output gear 130 may rotate.

As described above, the second gear 120 may be formed by a pitch circle different from the same center of rotation of the second gear 121 and the second gear 122 included in the second gear 120. The output speed 130 interlocked with the 2-1 th gear 121 and the 2-2 gear 122 may have different rotation speeds and torques for each rotation section.

Specifically, it will be described below with reference to FIG.

3 is a side view showing the arrangement of the gear group 100 according to an embodiment of the present invention.

Referring to FIG. 3, the rotation speed, the rotation range (angle of rotation), the torque, and the like of the ice tray 30 may be known by interlocking the output gear 130 and the second gear 120. As the rotational power generated from the motor unit 10 is shifted through the first gear 110, the rotation speed decreases and the torque may be increased while being transmitted to the second gear 120. The decrease in the rotation speed and the increase in the torque may be inversely related to each other when the rotational power transmitted from the motor unit 10 is kept constant, so that each value may be increased or decreased.

Of course, the rotational power may vary due to factors such as a supply signal or power as described above, but it is assumed that a certain rotational power is provided to explain the speed ratio and the structure of the gear group 100.

In the gear group 100, the first gear 110 and the second gear 120 may be rotated at the same rotational speed by receiving rotational power from the pinion 12 provided in the motor shaft 12a of FIG. 4. Of course, the rotation can be forward rotation and reverse rotation, this control can be performed by the motor unit 10, which is a stepping motor is rotated through the control unit.

While there is a first gear 110 and a second gear 120 which are configurations of the gear unit 100 rotated at the same rotation speed, the output gear 130 may have a rotation speed that varies depending on the rotation section. In this configuration, the first gear 131 and the second gear 132 included in the output gear 130 are respectively the second-second gear 122 and the second-first gear 121 of the second gear 120. And rotated in engagement with each other, the gear teeth (jaw) formed in the output gear 130 may be possible by forming a partial section in the pitch circle direction.

Specifically, the gear teeth (jaw) are formed in both the first gear 131 and the second gear 132, but may be formed in a portion of the section, the portion of the gear from the center of rotation of the output gear 130 The predetermined angle may be formed, and the predetermined angles at which gear teeth are formed on the first gear 131 and the second gear 132 may be prevented from overlapping each other. However, each of the predetermined angles may be arranged in succession on the angle (360 degrees) between the whole.

When the first gear 131 is interlocked with the second gear-2 and engaged with the second gear 122 to form a gear jaw of the first gear 131, the second gear 132 is rotated at a high speed. The rotation that is engaged with the second-first gear 121 by an angle formed by gear teeth (jaw) of the first gear 131 may be referred to as high torque rotation.

The high speed and the high torque mean that the first gear 131 and the second gear 132 are increased relative to each other when rotated in conjunction with the gear group 100.

In addition, the second gear 120 which is interlocked with the output gear 130 in the gear group 100 may have a flow section that freely rotates before and after the second gear 120 is linked with the output gear 130. That is, since the linkage with the output gear 130 in which the gear teeth (jaw) are formed in the predetermined section is performed according to the section, the second gear 1-1 in a state in which the first gear 131 and the second gear 132 are not interlocked. The gear 121 and the second and second gears 122 may have free flow sections.

In addition, by using different modules, a rotation section in which the torque of the linked output gear 130 is increased and the rotation speed is decreased may be formed.

In addition, the first gear 131 may further display a display unit (not shown) that may display, by visual information, that the first gear 131 is arranged in a rotational standby state while the first gear 131 is linked. It may include. The display unit may be displayed in a different color from the jaw of a particular gear tooth or in a scale or the like. Therefore, according to the position of the display unit (not shown), it is possible to check whether the origin state.

Furthermore, since the high speed rotation and the high torque rotation of the output gear 130 may rotate the ice tray 30 connected to the connecting shaft 133, the ice tray 30 may be rotated at high speed or high torque. have. This will be described in more detail with reference to FIG. 5 below.

4 is a plan view showing the arrangement of the gear group 100 according to an embodiment of the present invention.

Referring to FIG. 4, the motor shaft 12a extends in one direction from the body of the motor unit 10, and the pinion 12 may be provided on the extended motor shaft 12a. The gear group 100 that rotates in association with the pinion 12 may be connected to the ice tray 30 through the output shaft 133. The direction in which the output shaft 133 connected to the ice tray 30 extends may be opposite to the direction in which the motor shaft 12a extends from the body of the motor unit 10. The gear group 100 and the motor 10 located in the control box 20 may be disposed in the structure as described above to reduce the volume of the control box 20.

In addition, a geared motor may be employed as the motor unit 10 as a method for reducing the volume of the control box. By employing a geared motor, an eccentric distance E between the center of rotation MC of the rotor embedded in the motor unit 10 and the motor shaft 12a extending to the outside of the body may be formed. By the eccentric distance (E) can be arranged so that the body of the motor unit 10 more adjacent to the inside of the control box (20). That is, the control box 20 can be further miniaturized by arranging the motor unit 10 inside the control box 20 by the eccentric distance E formed between the rotor rotation center MC and the center of the motor shaft 12a. It becomes possible.

5 is a view illustrating a range in which the ice tray 30 is rotated according to embodiments of the present invention.

Referring to FIG. 3, the rotation range of the ice tray 30 according to the rotation of the output gear 130 described above may be described in detail.

First, both sides of the ice tray 30 can be rotated and the rotation is divided into a second section and a third section of the first section, which will be described as A-B section, B-C section, and C-A section, respectively.

Referring to FIG. 5, as an example of the rotation angle range of the ice tray 30 rotated by the output gear 130 included in the above-described embodiment, ice-making water is supplied to the ice tray 30 and a subzero temperature environment. When the state is changed to ice by ice making, ice making can be performed. In this case, in the embodiments of the present invention, the ice may be defrosted by twisting the ice tray 30.

De-icing may be basically performed by forward and reverse rotation by the motor unit 10. Specifically, for example, if rotated by about 160 degrees when the forward rotation by the motor unit 10, the reverse rotation is rotated 160 degrees after the forward and reverse rotation is performed the ice tray 30 at the origin Can be returned. Here, when the reverse rotation is a process of returning to the origin and the forward rotation is a process for making ice, the forward rotation may be divided into A-B and B-C. Also, the 160 degrees may be determined in the range of 180 degrees or less as an example. Here, the process of performing the reverse rotation by the forward rotation and the forward rotation by one rotation range may be one cycle.

Further, as an example, the A-B section (forward rotation section) and the C-A section (reverse rotation section) is rotated at 1 RPM, the torque may be 10 kgfcm. And the B-C section (forward rotation section) is rotated at 0.25 RPM, the torque can be 40 kgfcm. In addition, the time consumed to perform the single cycle depends on the angular range of the A-C section, but may be, for example, 90 seconds to 120 seconds. Of course, depending on the rotational speed may vary depending on the factors described above.

In particular, the gear ratios of the B-C section twisting the ice tray 30 and the A-B section and the C-A section to rotate at high speed may be formed between 1.5 times and 4.7 times.

In FIG. 5, the ice tray 30 may be rotated by an A-B section (first section) based on the ice tray rotation center O. FIG. The rotation corresponds to a high speed rotation by the first gear, and the rotation is not twisted by the ice tray 30, and both ends including one side and the other side of which the ice tray 30 is connected to the output gear 130. It can be a section that is rotated by the same rotation angle together. Therefore, as described above, the A-B section may be an angle at which the ice can be moved in its own weight direction by its own weight, for example, an angle of 90 degrees or more, and may be 120 degrees in a specific example. When one side of the ice tray 30 connected to the connecting shaft 133 is rotated by the rotation of the output gear 130 from the point B to the point C, the other side is restricted by a stopper (not shown) and stopped. Can be. That is, the rotational force transmitted by the one side portion by the connecting shaft 133 may be applied to one side portion such that the ice tray 30 may be twisted (second section). As the ice tray 30 that has already rotated the A-B section is twisted, the iced ice may move in its own weight direction. After ice is iced, the ice tray 30 returns to the A point of origin (third section).

Therefore, in the section in which the first gear 131 is interlocked and rotated, both ends of the ice tray 30 are rotated to the point B, and in the section in which the second gear 132 is interlocked and rotated, both ends of the ice tray 30 are rotated. Only one side portion of the connecting shaft 133 may be connected to the C point.

The rotation section may include a forward rotation section and a third section including first and second sections divided based on positions adjacent to the stopper (not shown) so that the ice tray 30 may be twisted. It includes a reverse rotation section including, the rotation of the ice tray 30 is performed in the order of the first section, the second section and the third section, the other side of the eye tray 30 is the stopper ( If not adjacent to the second gear 132, the second gear 132 may be interlocked so as to increase the rotation torque of the output gear 130. Furthermore, the rotation of the second section may be controlled by a low pulse per second so that the rotation speed of the ice tray 30 is lowered.

On the other hand, the rotation section is a forward rotation section including a first section and a second section divided into positions before and after the angle adjacent to the rotation angle of the ice tray 30, the twist of the ice tray 30 is started, and the third section It may be divided into a reverse rotation section including a. The rotation is performed in the order of the first section, the second section, and the third section, and the first section and the third section may be pulse-controlled so that the rotation torque is reduced than the second section. For example, the first section and the third section may be driven by a higher pulse per second than the second section.

When the rotation path of the ice tray 220 is classified, the A-B section (first section), the B-C section (second section), and the C-A section (third section) may be divided. That is, section A-B is a rotation for providing an angle at which ice can be moved in its own weight direction, and section B-C is a rotation for twisting the ice tray 30 with the rotational power of the motor unit 10 to make ice. In addition, the C-A section may be a rotation to the state that can receive the ice-making water again, as the ice tray 30 returns to the origin.

In addition, when the ice tray 30 is formed of a resin material having elasticity, the torque when twisting the ice tray 30 in the BC section is required to be larger than the AB section in which the ice tray 30 is rotated. Can decrease and increase torque. The relationship between the rotational speed and the torque is as described in the foregoing description, when the same rotational power is provided from the motor unit 10, the change in the rotational speed through the speed ratio changes the torque, and the rotational speed and the torque are inversely proportional to each other. Can change. That is, even if the same rotational power is transmitted, the gear ratio can be variably determined according to the section, so that the rotational speed and torque can be varied.

Therefore, the section in which torque is the greatest among the three sections described above is a section B-C, and sections A-B and C-A may be adjusted in consideration of speed. In addition, the above-described angle of each section is an example, and the rotation angle for each section may be variously changed by those skilled in the art.

As described above, the motor unit 10 may be a stepping motor. Furthermore, it may be a stepping motor and at the same time a geared motor. A plurality of gears may be provided on a side from which the motor shaft 121 extends from the motor unit 10 to adjust the speed ratio to increase or decrease the rotation speed of the motor unit 10. Of course, since the rotation speed and the torque may be inversely proportional to one of ordinary skill in the art in consideration of the rotation speed and the torque, the gear ratio of the geared motor may be determined.

6 is an exploded perspective view showing the structure of the second gear 120 according to an embodiment of the present invention.

Referring to FIG. 6, the second gear 120 rotated in association with the output gear 130 may be operated by the combination of the second-first gear 121 and the second-second gear 122. The operation means that the second-first gear 121 and the second-two gear 122 move by generating an angle play by the rotation angle R, and the rotation angle R is the second-first gear ( 121) means a rotation range capable of compensating for the difference in rotational speed between the second and second gears 122. For example, the rotation angle R may be 20 degrees.

Since the modules when the first gear 131 and the second gear 132 are linked may be different from each other, a difference in rotational speed may occur and a transmission path of the rotational power may be changed from the first gear 131 to the second gear 132. Since the speed difference occurs at the time of movement, the gear rotation may be stopped if the rotation angle R is not formed.

Therefore, the rotation angle (R) for accommodating the rotational speed difference of the gear should be formed. For this purpose, the 2-2 gear 122 is coupled to the inside of the 2-1 gear 121 so that the slide portion 122a is It may be rotated in the guide portion 121a.

Although exemplary embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1: ice maker
10: motor unit
11: Built-in Gear
12: pinion
20: control box
30: ice tray
31: receptacle
100: gear group
110: first gear
111: 1-1 gear
112: 1-2 gear
120: second gear
121: 2-1 gear
122: 2-2 gear
130: output difference
131: first gear
132: second gear
133: connecting shaft
150: high speed connection
160: high torque connection
E: Eccentric Distance
MC: rotor rotation center
A: Branch 1
B: second point
C: third branch
O: icetray rotation center

Claims (18)

Control box;
A motor unit provided in the control box and generating rotational power;
The rotational power of the motor unit is transmitted, the output gear for transmitting the rotation shifted to the outside of the control box in conjunction with one or more gears and a gear ratio having a speed ratio in which the rotational speed by the rotational power can be shifted Gear group including; And
One side portion is connected to a connecting shaft extending from the output gear of the gear group and rotated by the final speed determined by the speed ratio transmitted by the output gear, and the rotation angle of the one side is the rotation angle of the other side. Includes a larger ice tray,
The ice tray is operated in one cycle including a forward rotation section and a reverse rotation section that is reversely rotated by the rotation range of the forward rotation section, and ice making is performed in the forward rotation section, and the reverse rotation section returns to the origin. Rotation
The output difference is,
Receives the rotational power of the motor unit through the one or more gears, the first gear and the second gear is formed of different modules to be rotated through the two speed ratio during rotation is formed,
The first gear and the second gear are formed in different predetermined rotation sections,
The second gear which is directly linked to the output difference,
An ice maker comprising: a 2-1 gear including a guide portion and a 2-2 gear including a slide portion, and the slide portion is rotatable by a predetermined angle on a coaxial axis along the guide portion.
The method according to claim 1,
The motor unit,
The motor shaft of the motor unit is disposed so as to extend in the opposite direction to the connecting shaft of the output gear.
The method according to claim 2,
The motor shaft is formed eccentric with the body of the motor portion, ice maker.
The method according to claim 1,
And the motor portion is a geared stepping motor.
The method according to claim 1,
The output difference is,
In the section in which the interlocked gears and the first gear are interlocked and rotated, the ice tray is rotated at a higher speed than the section in which the interlocked gears and the first gear are rotated.
In the section in which the gear and the second gear is interlocked to rotate, the ice tray is rotated with a higher torque than the section to be rotated in conjunction with the first gear.
The method according to claim 1,
The ice tray,
The one side portion is rotated at the time of rotation by the linkage of the first gear and the second gear,
The other side is rotated only when the rotation of the first gear by the interlock, ice maker.
The method according to claim 1,
The ice tray is formed of a resin material having an elastic, ice maker.
The method according to claim 1,
The rotation range of the connecting shaft is less than 180 degrees,
An ice maker is provided with a plurality of sections having different rotation speeds and torques within the rotation range of 180 degrees.
The method according to claim 1,
The rotation of the connecting shaft is rotated forward or reverse by a predetermined angle, and rotated by the same angle in one cycle, ice maker.
The method according to claim 1,
Wherein said one cycle is performed for 90 to 120 seconds.
The method according to claim 1,
Ice maker interlocked with the gear group further comprises an ice-sensing lever that is operated through the rotational power of the gear group.
The method according to claim 1,
And a correction capacitance sensor for detecting an amount of ice making water received in the accommodation portion of the ice tray.
The method according to claim 1,
In the gear group, the gear which is interlocked with the output gear among the one or more gears is formed with a flow section for free rotation before and after the linkage in the predetermined different rotation section, ice maker
The method according to claim 1,
By the different modules,
And a rotation section in which a torque of the output gear linked thereto is increased and a rotation speed decreases.
The method according to claim 1,
The first gear is,
The ice maker of claim 1, further comprising a display unit for displaying the origin in the rotation standby state in a state where the first gear is interlocked.
The method according to claim 1,
The predetermined angle is 20 degrees.
The refrigerator containing the ice maker of any one of Claims 1-16. delete

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