US20170089629A1 - Ice maker, refrigerator comprising same, and method for controlling ice maker heater - Google Patents
Ice maker, refrigerator comprising same, and method for controlling ice maker heater Download PDFInfo
- Publication number
- US20170089629A1 US20170089629A1 US15/310,885 US201415310885A US2017089629A1 US 20170089629 A1 US20170089629 A1 US 20170089629A1 US 201415310885 A US201415310885 A US 201415310885A US 2017089629 A1 US2017089629 A1 US 2017089629A1
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- United States
- Prior art keywords
- ice
- heater
- control unit
- power
- refrigerator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C5/00—Working or handling ice
- F25C5/02—Apparatus for disintegrating, removing or harvesting ice
- F25C5/04—Apparatus for disintegrating, removing or harvesting ice without the use of saws
- F25C5/08—Apparatus for disintegrating, removing or harvesting ice without the use of saws by heating bodies in contact with the ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/04—Producing ice by using stationary moulds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/22—Construction of moulds; Filling devices for moulds
- F25C1/24—Construction of moulds; Filling devices for moulds for refrigerators, e.g. freezing trays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C5/00—Working or handling ice
- F25C5/02—Apparatus for disintegrating, removing or harvesting ice
- F25C5/04—Apparatus for disintegrating, removing or harvesting ice without the use of saws
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C5/00—Working or handling ice
- F25C5/20—Distributing ice
- F25C5/22—Distributing ice particularly adapted for household refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2305/00—Special arrangements or features for working or handling ice
- F25C2305/024—Rotating rake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2400/00—Auxiliary features or devices for producing, working or handling ice
- F25C2400/10—Refrigerator units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2600/00—Control issues
- F25C2600/04—Control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2700/00—Sensing or detecting of parameters; Sensors therefor
- F25C2700/06—Rotation angle of the ejector ejecting ice from a stationary mould
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2700/00—Sensing or detecting of parameters; Sensors therefor
- F25C2700/12—Temperature of ice trays
Definitions
- Embodiments of the present disclosure relate to an ice maker, a refrigerator having the same, and a method for controlling an ice maker heater, and more particularly, to an ice maker which may notify a refrigerator of an operation of an ice separation heater, a refrigerator which may reduce or stop an operation of an electronic component during the operation of the ice separation heater, and a method for controlling use of electricity of other components to be limited or mixed during the operation of the ice separation heater in order to secure a DC current required during an operation of a heater of the ice maker.
- a refrigerator includes a refrigerator compartment that keeps food refrigerated and a freezer compartment that keeps food frozen. At this point, an ice maker for producing ice is installed in the freezer compartment or the refrigerator compartment.
- FIG. 1 is a perspective view showing a conventional ice maker for a refrigerator
- FIG. 2 is a view showing a state in which a heater is formed in a lower portion of a conventional ice maker for a refrigerator.
- a conventional ice maker 10 for a refrigerator includes an ice making tray 11 , an ejector 13 , a control unit 15 , a side guide 17 , an ice bank 19 , a water supply pipe 21 , a water supply cup 23 , an ice full sensing lever 25 , and a heater 27 .
- the conventional ice maker 10 for a refrigerator may supply water to an ice making space within the ice making tray 11 through the water supply pipe 21 and the water supply cup 23 , and then start to perform an ice making operation on the supplied water.
- the conventional ice maker 10 for a refrigerator may slightly dissolve ice firmly attached to an inner surface of the ice making tray 11 by operating the heater 27 installed at a lower portion of the ice making tray 11 .
- the heater 27 is constituted of, for example, a sheath heater and is formed in a U-shape from the lower portion of the ice making tray 11 .
- film heaters 106 and 108 have been mainly used as heaters in order to improve adhesion between the ice making tray 11 and the heaters, and the heaters are separated into a first heater and a second heater and installed on both side portions or lower portions of an ice making tray to effectively separate ice from the ice making tray in order to effectively perform ice separation.
- a motor for rotating the ejector 13 and the ice separation heater installed in close contact with one side of the ice making tray 11 uses high power of 145 W using AC power and consumes much power, and when ice separation is performed by replacing the ice separation heater with a DC heater, a DC current required for the DC heater should be additionally secured from a DC power unit built into a refrigerator or the like with an ice maker installed therein resulting in an increase in a product price or the like.
- an ice maker may be mounted inside a refrigerator and receive a supply of water, and when water is frozen by cold air inside the refrigerator, the ice maker may automatically discharge the frozen water to an ice storage box using an ejector. At this point, the ice maker may apply heat to the tray using an ice separation heater so that the ice can be easily separated from the tray.
- a refrigerator may cool air inside the refrigerator using a refrigeration cycle including a compressor, a condenser, a decompressor, and an evaporator, and evenly spread the cooled air inside the refrigerator using a cooling fan disposed in the vicinity of the evaporator and a cold air blowing fan disposed in a refrigerator compartment or the like.
- an operational timing of the ice separation heater of the ice maker is determined by a control unit of the ice maker which is operated independently of the refrigerator. That is, when it is determined that water stored in a tray of the ice maker is completely frozen and becomes ice using an ice making sensor or the like attached to the tray of the ice maker, the control unit of the ice maker may supply power to the ice separation heater and cause an increase in power consumption.
- the control unit of the ice maker operates the ice separation heater while a main control unit of the refrigerator operates a compressor motor, a cooling fan, or the like of the refrigeration cycle in order to lower a temperature inside the refrigerator, since an amount of current is increased and cold air is supplied to the tray, an effect of the ice separation heater applying heat to the tray may be halved.
- the present disclosure is directed to providing an ice maker which may enable a refrigerator to recognize an operation of an ice separation heater when the ice maker operates the ice separation heater, and a refrigerator which may reduce or stop a supply of power to an electronic component when an ice maker notifies the refrigerator of an operation of an ice separation heater.
- the present disclosure is also directed to providing a method for controlling an amount of current supplied to a motor, a heater, an electronic component, and the like using an amount of current of limited DC power to driving a DC heater in a cross-management method or a mixed-management method, and an ice maker operated using the method.
- an ice maker for a refrigerator including: a tray that accommodates a liquid; an ejector that discharges ice frozen in the tray; a first heater that provides heat to the tray; and an ice maker control unit, wherein the ice maker enables a main control unit of the refrigerator to recognize a completion of ice making or a start of an operation of the first heater when the first heater is operated.
- the ice maker control unit may enable the main control unit to recognize the completion of ice making or the start of the operation of the first heater.
- the ice maker control unit may enable the main control unit to recognize the completion of ice making or the start of the operation of the first heater through a power line for receiving power from the main control unit.
- the ice maker for a refrigerator may further include a motor that supplies power to the ejector, wherein the ice maker control unit enables the main control unit to recognize an operation of the motor when the motor is operated.
- the ice maker control unit may enable the main control unit to recognize a supply of the liquid when the liquid is supplied to the tray.
- the ice maker for the refrigerator may further include an ice making sensor that detects whether the liquid in the tray is frozen, wherein the ice maker control unit notifies the main control unit of the completion of ice making when the ice maker control unit receives a signal of the ice making sensor.
- the ice maker control unit may notify the main control unit of the completion of ice making through a power line for receiving power from the main control unit.
- the main control unit may reduce or block power supplied to an electronic component of the refrigerator when the main control unit recognizes a start of an operation of the first heater by the ice maker control unit.
- the main control unit may reduce or stop a supply of power to an electronic component of the refrigerator when the main control unit recognizes an operation of a motor for supplying power to the ejector.
- the electronic component may be at least one of a compressor motor, a blowing fan for blowing cold air, and a second heater mounted in the refrigerator.
- Still another aspect of the present disclosure provides a refrigerator including an ice maker, wherein the ice maker includes a tray that accommodates a liquid, an ejector that discharges ice frozen in the tray, a first heater that provides heat to the tray, and an ice maker control unit, the refrigerator including: a main control unit that measures or controls a current supplied to the ice maker.
- the main control unit may compare a magnitude of the measured current with a predetermined value and reduce or stop a supply of power to an electronic component of the refrigerator when the magnitude is larger than the predetermined value.
- the electronic component may be at least one of a compressor motor, a blowing fan for blowing cold air, and a second heater mounted in the refrigerator.
- the ice separation heater may be a planar heater.
- DC power may be supplied to the ice separation heater while the ice maker performs an ice separating operation.
- an ice maker for a refrigerator including: an ice making tray that accommodates ice making water; a driving unit; and an ice separation heater that is attached to the ice making tray, wherein a required amount of power is supplied to the ice separation heater by controlling an electronic component of the refrigerator during an ice separating operation of the ice maker.
- a further aspect of the present disclosure provides an ice maker that transmits a signal indicating performance of an ice separating operation to a refrigerator.
- a further aspect of the present disclosure provides an ice maker including an ice making tray that accommodates ice making water, a driving unit, and an ice separation heater, wherein power supplied to the ice separation heater is pulse width modulation (PWM)-controlled.
- PWM pulse width modulation
- FIG. 1 is a perspective view showing a conventional ice maker for a refrigerator
- FIG. 2 is a view showing a state in which a heater is formed in a lower portion of a conventional ice maker for a refrigerator;
- FIG. 3 is a partial cross-sectional view of a conventional ice maker
- FIG. 4 is a schematic view showing an inner structure of a cooling device which includes an ice maker according to the present invention and uses a method for controlling a heater of an ice maker according to the present invention
- FIG. 5 is a partial cross-sectional view of an ice maker according to an embodiment of the present invention.
- FIG. 6 is a block diagram of an ice maker according to a preferred embodiment of the present invention.
- FIG. 7 is a control block diagram of a refrigerator according to another embodiment of the present invention.
- FIG. 8 is a control block diagram of a refrigerator according to still another embodiment of the present invention.
- FIG. 4 is a schematic view showing an inner structure of a cooling device which includes an ice maker according to the present invention and uses a method for controlling a heater of an ice maker according to the present invention.
- the cooling device includes an ice maker 100 in an upper portion thereof that receives a supply of water or the like, freezes the water, and stores the frozen water; a cold air blowing fan 200 that is used to circulate cold air inside a cooler; and a compressor 300 that is used to compress a refrigerant of the cooling device.
- the ice maker 100 , the cold air blowing fan 200 , and the compressor 300 are shown as electronic components of the cooling device, but it should be apparent to those skilled in the art that other electronic components may be included in the cooling device.
- the ice maker 100 may be made of PP (polypropylene) or aluminum.
- FIG. 5 is a partial cross-sectional view of an ice maker according to an embodiment of the present invention.
- the ice maker 100 includes an ice making tray 11 , an ejector 13 , a first heater 121 , a second heater 122 , a temperature sensor 130 , a position sensor 131 , and a power control operating system 140 (see FIG. 6 ).
- the ejector 13 includes a plurality of ejector fins 13 - 2 that are disposed to be spaced apart from one another along an axis perpendicular to the drawing in order to push ice of the ice making tray 11 during an ice separating operation; a shaft 13 - 1 that is disposed to be rotated together with the ejector fins 13 - 2 ; and a motor 110 (see FIG. 6 ) that rotates the shaft 13 - 1 during the ice separating operation.
- the ice making tray 11 has an ice making space that may accommodate water therein.
- An inner space of the ice making tray 11 is divided into a plurality of ice making spaces by a plurality of partition walls. At this point, the divided ice making spaces inside the ice making tray 11 are formed to correspond to the ejector fins 13 - 2 , respectively.
- An ice separation heater for slightly dissolving ice frozen on an inner surface of the ice making tray 11 by heating the ice making tray 11 so that ice separation can smoothly proceed during the ice separating operation that is, a first heater 121 and a second heater 122 , are installed below the ice making tray 11 to be in close contact with the ice making tray 11 .
- the first heater 121 and the second heater 122 are separately connected to the power control operating system 140 so as to receive a supply of a current from the power control operating system 140 (see FIG. 6 ).
- An amount of heat generated by the ice separation heater may vary depending on an amount of the supplied current.
- the power control operating system 140 may control power supplied to the first and second heaters 121 and 122 , for example, with PWM (pulse width modulation).
- two ice separation heaters 121 and 122 are provided, but, one or at least three ice separation heaters installed on a lower portion of the ice making tray 11 may be provided as necessary, and an attachment position of the ice separation heater may also be varied.
- the ice separation heaters 121 and 122 may be constituted of one or more of a film heater, a sheath heater, a cartridge heater, a cord heater, a planar heater, and a coating heater.
- the temperature sensor 130 for measuring a temperature of the ice making tray 11 is mounted at one side of the ice making tray 11 .
- the temperature sensor 130 is connected to the power control operating system 140 to transmit a measured value thereto (see FIG. 6 ).
- Gears for transmitting a driving force of the motor 110 to the shaft 13 - 1 of the ejector 13 are provided above the ice making tray 11 , and the printed circuit board (PCB) position sensor 131 is inserted into any one gear of these gears and mounted thereat to detect a magnetic field of a magnet rotated together with the gear.
- the position sensor 131 is connected to the power control operating system 140 and transmits the measured value thereto (see FIG. 6 ).
- FIG. 6 is a block diagram of an ice maker according to a preferred embodiment of the present invention.
- the ice maker includes an A/D converter, a power control operating system 140 , a motor 110 of an ejector 100 , ice separation heaters 121 and 122 , a temperature sensor 130 , a position sensor 131 , and a timer 132 .
- the power control operating system 140 receives a supply of a current from a DC power unit, for example, the A/D converter, a rectifier, a smoothing circuit, or the like.
- a DC power unit for example, the A/D converter, a rectifier, a smoothing circuit, or the like.
- the power control operating system 140 receives signals from the temperature sensor 130 that measures a temperature of an ice making tray 11 and transmits the measured value, the position sensor 131 , which is inserted into a gear for transmitting a driving force from the motor 110 to an ejector shaft 13 - 1 , detects a magnetic field of a magnet rotated together with the gear and transmits a measured signal, and the timer 132 notifies the power control operating system 140 of a time elapsed from the start of an ice separating operation.
- the power control operating system 140 controls a current supplied to the motor 110 of the ejector 100 , the first heater 121 , the second heater 122 , a compressor 300 , and a blowing fan 200 based on the signals received from the temperature sensor 130 , the position sensor 131 , and the timer 132 .
- the power control operating system 140 may start an ice separating operation for discharging frozen ice from the ice making tray 11 based on a signal measured by the temperature sensor 130 , and then cross-manage and distribute power of the ice separation motor 110 of the ejector 100 and the ice separation heaters 121 and 122 . That is, a current is not supplied to the ice separation heaters 121 and 122 while a current is supplied to the ice separation motor 110 of the ejector 100 , and a current is supplied to the ice separation heaters 121 and 122 when a current is not supplied to the ice separation motor 110 .
- a current is supplied only to the ice separation heater after starting the ice separating operation, and, after ice is dissolved to a certain extent, a current is supplied only to the ice separation motor 110 until ejector fins 13 - 2 approach the ice.
- a current is supplied only to all of the ice separation heaters or the first heater 121 .
- a current is supplied only to the motor 110 in order to rotate the ejector fins 13 - 2 again, and when the ejector fins 13 - 2 arrive at the vicinity of a portion where the second heater 122 is installed, a current is supplied only to the second heater 122 again, and then a current is supplied only to the motor 110 again after a certain period of time has elapsed.
- the power control operating system 140 may mixedly manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 .
- the power control operating system 140 may increase or increase and then decrease the current supplied to the ice separation motor 110 while the fins 13 - 2 of the ejector 100 approach ice of the ice making tray 11 , pass through the ice making tray 11 , and make one revolution, and may decrease the current supplied to the ice separation heaters 121 and 122 in a stepwise or continuous manner from an initial maximum value.
- the power control operating system 140 may simultaneously manage and distribute power of some of the ice separation motor 110 and the ice separation heaters 121 and 122 .
- the power control operating system 140 may increase or increase and then decrease the current supplied to the ice separation motor 110 in a stepwise or continuous manner along each of steps including, for example, a step focusing on dissolving ice and a step focusing on discharging ice while the fins 13 - 2 of the ejector 100 approach the ice of the ice making tray 11 , pass through the ice making tray 11 , and make one revolution, and may decrease the current supplied to the ice separation heaters 121 and 122 in a stepwise or continuous manner from the initial maximum value or supply the current to the first heater 121 and the second heater 122 with a time difference therebetween.
- the power control operating system 140 may initially supply a larger amount of current to the first heater 121 than the second heater 122 after starting the ice separating operation, and increase the amount of current supplied to the second heater 122 while gradually decreasing the amount of current supplied to the first heater 121 , or may supply a current to the second heater 122 without supplying a current to the first heater 121 , that is, by turning the first heater 121 off. That is, the power control operating system 140 may perform a supply of full load power and a supply of power below the full load power on the ice separation heaters for each condition.
- the power control operating system 140 may receive a value of the position sensor 131 after starting the ice separating operation and estimate the position of the fins 13 - 2 of the ejector 13 .
- the power control operating system 140 may cross-manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 , simultaneously manage and distribute power of some of the ice separation motor 110 and the ice separation heaters 121 and 122 , or mixedly manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 by using the estimated position of the fins 13 - 2 of the ejector 13 .
- the power control operating system 140 may use, for example, a signal from the timer 132 and cross-manage and distribute the power of the above-described ice separation motor 110 and ice separation heaters 121 and 122 , simultaneously manage and distribute power of some of the ice separation motor 110 and the ice separation heaters 121 and 122 , or mixedly manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 based on this signal.
- the power control operating system 140 may use, for example, a signal from the temperature sensor 130 and cross-manage and distribute the power of the above-described ice separation motor 110 and ice separation heaters 121 and 122 , simultaneously manage and distribute power of some of the ice separation motor 110 and the ice separation heaters 121 and 122 , or mixedly manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 based on this signal.
- the power control operating system 140 may more accurately estimate the position of the fins 13 - 2 using, for example, signals from any two or three of the temperature sensor 130 , the position sensor 131 , and the timer 132 and cross-manage and distribute the power of the above-described ice separation motor 110 and ice separation heaters 121 and 122 , simultaneously manage and distribute power of some of the ice separation motor 110 and the ice separation heaters 121 and 122 , or mixedly manage and distribute the power of the ice separation motor 110 and the ice separation heaters 121 and 122 using the estimated position.
- the power control operating system 140 may use a method of managing and distributing the power of the ice separation motor 110 and the ice separation heaters 121 and 122 in order to manage and distribute the power of the ice separation heater and electronic components of the cooling device, for example, the compressor 300 and the blowing fan 200 .
- a method of managing and distributing the power of the ice separation motor 110 and the ice separation heaters 121 and 122 in order to manage and distribute the power of the ice separation heater and electronic components of the cooling device, for example, the compressor 300 and the blowing fan 200 .
- the compressor 300 for example, by cross-managing and distributing the power of the ice separation heaters 121 and 122 and the compressor 300 , it is possible to cut off and control a current supplied to the compressor 300 while a current is supplied to the ice separation heaters 121 and 122 .
- the power control operating system 140 may operate a DC heater at maximum capacity using a limited DC current by managing and distributing power of the electronic components of the cooling device such as the ice separation heaters 121 and 122 , the compressor 300 , and the like.
- FIG. 7 is a control block diagram of a refrigerator according to another embodiment of the present invention.
- a refrigerator 400 may include a power supply unit 421 , a main control unit 420 , electronic components 422 , and an ice maker 415 .
- the electronic components 422 of the refrigerator may include at least one of a compressor motor 424 of a compressor (not shown) constituting a cooling cycle of refrigerator, a cold air blowing fan 423 disposed to be adjacent to an evaporator (not shown) constituting the cooling cycle, another cold air blowing fan (not shown) that is arranged inside the refrigerator to circulate cold air, and a heater that is arranged inside the refrigerator to remove, for example, frost.
- a compressor motor 424 of a compressor constituting a cooling cycle of refrigerator
- a cold air blowing fan 423 disposed to be adjacent to an evaporator (not shown) constituting the cooling cycle
- another cold air blowing fan (not shown) that is arranged inside the refrigerator to circulate cold air
- a heater that is arranged inside the refrigerator to remove, for example, frost.
- the main control unit 420 of the refrigerator may receive a supply of a current from the power supply unit 421 and appropriately supply the received current to the electronic components 422 and the ice maker 415 .
- the main control unit 420 may control power supplied directly from the power supply unit 421 to the electronic components 422 and the ice maker 415 .
- the ice maker 415 may include a tray (not shown) that receives a supply of liquid, an ejector (not shown) that discharges ice frozen in the tray, a motor 411 that provides a driving force to the ejector, an ice separation heater 412 that applies heat to the tray, an ice making sensor 413 that transmits a signal for determining a frozen state to a control unit 410 , and the control unit 410 that receives the signal of the ice making sensor 413 and controls power supplied to the ice separation heater 412 and the motor 411 .
- the ice separation heater 412 may be any one of a planar heater, a cord heater, and a flexible heater.
- the planar heater may generate heat over a predetermined area.
- the planar heater may be manufactured in a thin form, for example, with a thickness of more than 0 and 1 mm or less.
- the planar heater may be manufactured in a thin form to reduce heat capacity thereof, and thereby quickly increase a temperature of the planar heater to a predetermined temperature. In this case, power consumption of the planar heater may be reduced.
- a positive temperature coefficient (PTC) heater may be used as the planar heater, but the present invention is not limited thereto.
- the planar heater may include a heating body, a first insulating member that is provided to surround the heating body on one surface of the heating body, and a second insulating member that is provided to surround the heating body on the other surface of the heating body.
- the heating body may be provided over the whole area of the planar heater in a zigzag form.
- a thin metal film such as a thin stainless film, a thin platinum film, a thin tungsten film, a thin nickel film, or the like may be used as the heating body, however, the heating body is not limited thereto.
- the heating body may be formed by performing thin film coating on carbon nano tubes, a carbon nano plate, or the like.
- a pad for receiving power from the outside may be provided at the heating body.
- the first insulating member and the second insulating member may be made of a polyimide or grapheme material. In this case, it is possible to stably protect the heating body even when a temperature of the heating body is increased to a high temperature or external shock is applied to the heating body.
- the first insulating member and the second insulating member may be provided in the form of a film.
- the first insulating member and the second insulating member may be respectively attached to one surface of the heating body and the other surface thereof.
- the flexible heater may include a heat generating portion and an insulating portion that is formed to surround the heat generating portion.
- the heat generating portion is a portion that generates heat when a voltage is applied thereto.
- a general heating wire for example, a nickel-chrome wire, a copper-nickel wire, or the like
- the heat generating portion is not limited thereto and may be provided in a form in which a glass fiber is wound around the heating wire or the heating wire is wound around a glass fiber.
- the insulating portion is a portion that forms an outer shell of the flexible heater and serves to protect the heat generating portion.
- the insulating portion may be made of a soft insulating material or an insulating material having elasticity.
- the flexible heater has a flexible property, and therefore the flexible heater may be brought into close contact with an ice tray accommodating ice, or the flexible heater may be coupled to the tray in a zigzag form.
- a cord heater for example, is an example of the flexible heater, but the type of flexible heater is not limited thereto.
- the flexible heater includes the heat generating portion and the insulating portion, and therefore a diameter of the flexible heater may be formed to be smaller (for example, 2 to 4 mm) than that of a sheath heater. That is, the diameter of the flexible heater may be formed to be 1 ⁇ 3 to 1 ⁇ 2 the diameter of the sheath heater.
- the flexible heater has a small diameter and a flexible property, and therefore it is possible to increase an area in which the flexible heater comes into contact with the tray when the flexible heater is formed on an outer circumferential surface of the ice tray.
- the cord heater includes a connector for a power connection, a heat-generating cord heater wire, an attachment surface to which the cord heater wire is attached, electrothermal tape that adheres the cord heater wire and the attachment surface, and a connection terminal that connects a power input wire and the cord heater wire.
- the cord heater wire is provided in a form in which a heat generating wire is wound around a glass fiber and an insulator for electrical insulation is wrapped around the resultant object.
- connection terminal is formed by pressurizing a copper tube from an outside thereof to an inside thereof so that a radius thereof is decreased except for at both distal ends of the connection terminal in which the power input wire and the cord heater wire may be inserted and at a central area of the connection terminal in which the power input wire and the cord heater wire may be connected to each other.
- the power input wire and the cord heater wire are respectively inserted into both distal ends of the connection terminal obtained by pressurizing the copper tube in the above manner and connected to each other at the central area of the connection terminal.
- a waterproof connection tube is mounted on the outside of the connection terminal to prevent penetration of moisture from the outside.
- the power input wire connected with the connector for power connection and the cord heater wire are connected by the connection terminal, and thereby the cord heater receives power from the connector for power connection.
- the control unit 410 of the ice maker 415 may receive a supply of a current through a power line from the main control unit 420 of the refrigerator 400 .
- the control unit 410 may receive a signal of the ice making sensor 413 to determine whether ice making is completed.
- power may be supplied to the ice separation heater 412 to enable the ice separation heater 412 to apply heat to the tray.
- the control unit 410 determines that ice making is completed, power may be supplied to the motor 411 simultaneously with the supply of power to the ice separation heater 412 or after a certain period of time has elapsed.
- control unit 410 controls the ice separation heater 412 and the motor 411 is not limited thereto and can be changed into various types.
- control unit 410 may perform PWM control on the power supplied to the ice separation heater 412 .
- the main control unit 420 of the refrigerator 400 may recognize the completion of ice making.
- the control unit 410 of the ice maker 415 transmits a signal to the main control unit 420 through the power line through which power is received from the main control unit 420 so that the main control unit 420 may recognize the completion of ice making while supplying power to the ice separation heater 412 .
- the control unit 410 of the ice maker 415 may transmit a signal to the main control unit 420 through the power line so that the main control unit 420 may recognize the completion of ice making.
- the main control unit 420 that has received the signal from the control unit 410 of the ice maker 415 may stop or reduce a supply of power to at least one of the electronic components 422 , that is, the cold air blowing fan 423 , the compressor motor 424 , and the heater 425 , or change a corresponding frequency.
- cold air circulation inside the refrigerator 400 may be decreased or a drop in a temperature of the cold air may be suppressed, and thus heat applied to the tray by the ice separation heater 412 is not lost so that the ice separating operation may not be interrupted and the total power consumption of the refrigerator may be reduced or maintained at a constant level.
- the ice maker 415 having a structure according to the present embodiment and operations of the refrigerator 400 will be described.
- control unit 410 of the ice maker 415 determines that water accommodated in a tray is frozen using a signal from the ice making sensor 413 .
- the control unit 410 may supply power to the ice separation heater 412 during the ice separating operation so that the ice separation heater 412 may provide heat to the tray.
- the control unit 410 of the ice maker 415 may enable the main control unit 420 to recognize an operation of the ice separation heater 412 .
- the control unit 410 of the ice maker 415 may generate an ice separation start signal and transmit the ice separation start signal to the main control unit 420 through a power line for supplying power from the main control unit 420 to the control unit 410 .
- the control unit 410 of the ice maker 415 may transmit a signal indicating a completion of ice making received from the ice making sensor 413 to the main control unit 420 .
- the control unit 410 may provide power to the motor 411 for providing a driving force to an ejector so that the ejector may pressurize ice frozen in the tray to discharge the ice from the tray.
- the control unit 410 of the ice maker 415 may enable the main control unit 420 of the refrigerator to recognize an operation of the motor 411 .
- the control unit 410 may generate a signal indicating the supply of the power to the motor 411 and transmit the generated signal to the main control unit 420 of the refrigerator through the power line for supplying power from the main control unit 420 to the control unit 410 .
- the main control unit 420 may stop or reduce the supply of power to the electronic components 422 of the refrigerator or change the corresponding frequency when the main control unit 420 recognizes that ice making in the ice maker 415 is completed.
- FIG. 8 is a control block diagram of a refrigerator according to still another embodiment of the present invention.
- a refrigerator 400 ′ according to still another embodiment of the present invention is different from the refrigerator 400 according to another embodiment shown in FIG. 7 in that a main control unit 420 of the refrigerator 400 ′ may measure and control a current supplied to an ice maker 415 .
- the main control unit 420 of the refrigerator measures a magnitude of a current of power supplied from the main control unit 420 to an ice maker 415 .
- the main control unit 420 may compare the measured magnitude of the current with a predetermined value and determine that an ice separation heater 412 of the ice maker 415 is operated when the measured magnitude is equal to or larger than the predetermined value. Then, the main control unit 420 may reduce or stop a supply of power to electronic components 422 or change a corresponding frequency. For example, the main control unit 420 may reduce power supplied to a cold air blowing fan 423 , thereby reducing power consumption. Alternatively, the main control unit 420 may reduce or stop a supply of power to a compressor motor 424 or reduce a corresponding frequency.
- the main control unit 420 of the refrigerator may determine that the ice separation heater 412 is operated and reduce or stop a supply of power to the cold air blowing fan 423 and the compressor motor 424 so that cold air circulation inside the refrigerator may be reduced or a drop in the temperature of the cold air may be suppressed.
- the heat applied to the tray by the ice separation heater 412 is not lost so that the ice separating operation may not be interrupted and the total power consumption of the refrigerator may be maintained at a constant level.
- the main control unit 420 of the refrigerator may compare the measured magnitude of the current with a second predetermined value, and determine that the motor 411 for supplying a driving force to the ejector of the ice maker 415 is operated when the measured magnitude is equal to or larger than the second predetermined value. Then, the main control unit 420 may reduce or stop a supply of power to the electronic components 422 , or change the corresponding frequency. For example, the main control unit 420 may reduce the power supplied to the cold air blowing fan 423 , thereby reducing power consumption. Alternatively, the main control unit 420 may reduce or stop the supply of power to the compressor motor 424 or reduce the corresponding frequency.
- the main control unit 420 of the refrigerator may determine that the motor 411 of the ejector is operated, and reduce or stop the supply of power to the cold air blowing fan 423 and the compressor motor 424 so that cold air circulation inside the refrigerator may be decreased or a drop in a temperature of the cold air may be suppressed, and therefore an ice separating operation may not be interrupted and a total power consumption of the refrigerator may be maintained at a constant level.
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Abstract
Description
- Embodiments of the present disclosure relate to an ice maker, a refrigerator having the same, and a method for controlling an ice maker heater, and more particularly, to an ice maker which may notify a refrigerator of an operation of an ice separation heater, a refrigerator which may reduce or stop an operation of an electronic component during the operation of the ice separation heater, and a method for controlling use of electricity of other components to be limited or mixed during the operation of the ice separation heater in order to secure a DC current required during an operation of a heater of the ice maker.
- Generally, a refrigerator includes a refrigerator compartment that keeps food refrigerated and a freezer compartment that keeps food frozen. At this point, an ice maker for producing ice is installed in the freezer compartment or the refrigerator compartment.
-
FIG. 1 is a perspective view showing a conventional ice maker for a refrigerator, andFIG. 2 is a view showing a state in which a heater is formed in a lower portion of a conventional ice maker for a refrigerator. - Referring to
FIGS. 1 and 2 , aconventional ice maker 10 for a refrigerator includes anice making tray 11, anejector 13, acontrol unit 15, aside guide 17, anice bank 19, awater supply pipe 21, awater supply cup 23, an icefull sensing lever 25, and aheater 27. - The
conventional ice maker 10 for a refrigerator may supply water to an ice making space within theice making tray 11 through thewater supply pipe 21 and thewater supply cup 23, and then start to perform an ice making operation on the supplied water. When the ice making operation is completed, theconventional ice maker 10 for a refrigerator may slightly dissolve ice firmly attached to an inner surface of theice making tray 11 by operating theheater 27 installed at a lower portion of theice making tray 11. At this point, theheater 27 is constituted of, for example, a sheath heater and is formed in a U-shape from the lower portion of theice making tray 11. Next, when theconventional ice maker 10 for a refrigerator pushes ice within theice making tray 11 up by rotating theejector 13 in a clockwise direction, the ice slides downward on theside guide 17 formed at one side of theice making tray 11 and is accommodated in anice bank 19. - In addition, as shown in
FIG. 3 , in recent years,film heaters ice making tray 11 and the heaters, and the heaters are separated into a first heater and a second heater and installed on both side portions or lower portions of an ice making tray to effectively separate ice from the ice making tray in order to effectively perform ice separation. - However, in order to discharge the ice made in the
ice making tray 11 to theice bank 19 using theejector 13 in the above-described structure, a motor (not shown) for rotating theejector 13 and the ice separation heater installed in close contact with one side of theice making tray 11 uses high power of 145 W using AC power and consumes much power, and when ice separation is performed by replacing the ice separation heater with a DC heater, a DC current required for the DC heater should be additionally secured from a DC power unit built into a refrigerator or the like with an ice maker installed therein resulting in an increase in a product price or the like. - In addition, generally, an ice maker may be mounted inside a refrigerator and receive a supply of water, and when water is frozen by cold air inside the refrigerator, the ice maker may automatically discharge the frozen water to an ice storage box using an ejector. At this point, the ice maker may apply heat to the tray using an ice separation heater so that the ice can be easily separated from the tray.
- Meanwhile, a refrigerator may cool air inside the refrigerator using a refrigeration cycle including a compressor, a condenser, a decompressor, and an evaporator, and evenly spread the cooled air inside the refrigerator using a cooling fan disposed in the vicinity of the evaporator and a cold air blowing fan disposed in a refrigerator compartment or the like.
- However, an operational timing of the ice separation heater of the ice maker is determined by a control unit of the ice maker which is operated independently of the refrigerator. That is, when it is determined that water stored in a tray of the ice maker is completely frozen and becomes ice using an ice making sensor or the like attached to the tray of the ice maker, the control unit of the ice maker may supply power to the ice separation heater and cause an increase in power consumption. That is, when the control unit of the ice maker operates the ice separation heater while a main control unit of the refrigerator operates a compressor motor, a cooling fan, or the like of the refrigeration cycle in order to lower a temperature inside the refrigerator, since an amount of current is increased and cold air is supplied to the tray, an effect of the ice separation heater applying heat to the tray may be halved.
- The present disclosure is directed to providing an ice maker which may enable a refrigerator to recognize an operation of an ice separation heater when the ice maker operates the ice separation heater, and a refrigerator which may reduce or stop a supply of power to an electronic component when an ice maker notifies the refrigerator of an operation of an ice separation heater.
- The present disclosure is also directed to providing a method for controlling an amount of current supplied to a motor, a heater, an electronic component, and the like using an amount of current of limited DC power to driving a DC heater in a cross-management method or a mixed-management method, and an ice maker operated using the method.
- One aspect of the present disclosure provides an ice maker for a refrigerator including: a tray that accommodates a liquid; an ejector that discharges ice frozen in the tray; a first heater that provides heat to the tray; and an ice maker control unit, wherein the ice maker enables a main control unit of the refrigerator to recognize a completion of ice making or a start of an operation of the first heater when the first heater is operated.
- The ice maker control unit may enable the main control unit to recognize the completion of ice making or the start of the operation of the first heater.
- The ice maker control unit may enable the main control unit to recognize the completion of ice making or the start of the operation of the first heater through a power line for receiving power from the main control unit.
- The ice maker for a refrigerator may further include a motor that supplies power to the ejector, wherein the ice maker control unit enables the main control unit to recognize an operation of the motor when the motor is operated.
- The ice maker control unit may enable the main control unit to recognize a supply of the liquid when the liquid is supplied to the tray.
- The ice maker for the refrigerator may further include an ice making sensor that detects whether the liquid in the tray is frozen, wherein the ice maker control unit notifies the main control unit of the completion of ice making when the ice maker control unit receives a signal of the ice making sensor.
- The ice maker control unit may notify the main control unit of the completion of ice making through a power line for receiving power from the main control unit.
- Another aspect of the present disclosure provides a refrigerator which includes an ice maker for a refrigerator and a main control unit.
- The main control unit may reduce or block power supplied to an electronic component of the refrigerator when the main control unit recognizes a start of an operation of the first heater by the ice maker control unit.
- The main control unit may reduce or stop a supply of power to an electronic component of the refrigerator when the main control unit recognizes an operation of a motor for supplying power to the ejector.
- The electronic component may be at least one of a compressor motor, a blowing fan for blowing cold air, and a second heater mounted in the refrigerator.
- Still another aspect of the present disclosure provides a refrigerator including an ice maker, wherein the ice maker includes a tray that accommodates a liquid, an ejector that discharges ice frozen in the tray, a first heater that provides heat to the tray, and an ice maker control unit, the refrigerator including: a main control unit that measures or controls a current supplied to the ice maker.
- The main control unit may compare a magnitude of the measured current with a predetermined value and reduce or stop a supply of power to an electronic component of the refrigerator when the magnitude is larger than the predetermined value.
- The electronic component may be at least one of a compressor motor, a blowing fan for blowing cold air, and a second heater mounted in the refrigerator.
- The ice separation heater may be a planar heater.
- DC power may be supplied to the ice separation heater while the ice maker performs an ice separating operation.
- Yet another aspect of the present disclosure provides an ice maker for a refrigerator including: an ice making tray that accommodates ice making water; a driving unit; and an ice separation heater that is attached to the ice making tray, wherein a required amount of power is supplied to the ice separation heater by controlling an electronic component of the refrigerator during an ice separating operation of the ice maker.
- A further aspect of the present disclosure provides an ice maker that transmits a signal indicating performance of an ice separating operation to a refrigerator.
- A further aspect of the present disclosure provides an ice maker including an ice making tray that accommodates ice making water, a driving unit, and an ice separation heater, wherein power supplied to the ice separation heater is pulse width modulation (PWM)-controlled.
-
FIG. 1 is a perspective view showing a conventional ice maker for a refrigerator; -
FIG. 2 is a view showing a state in which a heater is formed in a lower portion of a conventional ice maker for a refrigerator; -
FIG. 3 is a partial cross-sectional view of a conventional ice maker; -
FIG. 4 is a schematic view showing an inner structure of a cooling device which includes an ice maker according to the present invention and uses a method for controlling a heater of an ice maker according to the present invention; -
FIG. 5 is a partial cross-sectional view of an ice maker according to an embodiment of the present invention; -
FIG. 6 is a block diagram of an ice maker according to a preferred embodiment of the present invention; -
FIG. 7 is a control block diagram of a refrigerator according to another embodiment of the present invention; and -
FIG. 8 is a control block diagram of a refrigerator according to still another embodiment of the present invention. - Hereinafter, specific embodiments of an ice maker according to the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments are merely exemplary embodiments, and the present invention is not limited thereto.
- When it is determined that a detailed description of a known art related to the present invention may unnecessarily obscure the gist of the present invention while describing the present invention, the detailed description thereof will be omitted. Further, the terminology described below is defined in consideration of functions in the present invention and may vary according to a user's or operator's intention or usual practice. Thus, the meanings of the terminology should be interpreted based on the overall context of the present specification.
- The technical idea of the present invention is determined by the claims, and the exemplary embodiments herein are provided so that the technical idea of the present invention will be efficiently explained to those skilled in the art to which the present invention pertains.
-
FIG. 4 is a schematic view showing an inner structure of a cooling device which includes an ice maker according to the present invention and uses a method for controlling a heater of an ice maker according to the present invention. - Referring to
FIG. 4 , the cooling device includes anice maker 100 in an upper portion thereof that receives a supply of water or the like, freezes the water, and stores the frozen water; a coldair blowing fan 200 that is used to circulate cold air inside a cooler; and acompressor 300 that is used to compress a refrigerant of the cooling device. - In addition, in
FIG. 4 , theice maker 100, the coldair blowing fan 200, and thecompressor 300 are shown as electronic components of the cooling device, but it should be apparent to those skilled in the art that other electronic components may be included in the cooling device. - For example, the
ice maker 100 may be made of PP (polypropylene) or aluminum. -
FIG. 5 is a partial cross-sectional view of an ice maker according to an embodiment of the present invention. - Referring to
FIG. 5 , theice maker 100 includes anice making tray 11, anejector 13, afirst heater 121, asecond heater 122, atemperature sensor 130, aposition sensor 131, and a power control operating system 140 (seeFIG. 6 ). - The
ejector 13 includes a plurality of ejector fins 13-2 that are disposed to be spaced apart from one another along an axis perpendicular to the drawing in order to push ice of theice making tray 11 during an ice separating operation; a shaft 13-1 that is disposed to be rotated together with the ejector fins 13-2; and a motor 110 (seeFIG. 6 ) that rotates the shaft 13-1 during the ice separating operation. - The
ice making tray 11 has an ice making space that may accommodate water therein. An inner space of theice making tray 11 is divided into a plurality of ice making spaces by a plurality of partition walls. At this point, the divided ice making spaces inside theice making tray 11 are formed to correspond to the ejector fins 13-2, respectively. - An ice separation heater for slightly dissolving ice frozen on an inner surface of the
ice making tray 11 by heating theice making tray 11 so that ice separation can smoothly proceed during the ice separating operation, that is, afirst heater 121 and asecond heater 122, are installed below theice making tray 11 to be in close contact with theice making tray 11. Thefirst heater 121 and thesecond heater 122 are separately connected to the powercontrol operating system 140 so as to receive a supply of a current from the power control operating system 140 (seeFIG. 6 ). An amount of heat generated by the ice separation heater may vary depending on an amount of the supplied current. The powercontrol operating system 140 may control power supplied to the first andsecond heaters - In the present embodiment, two
ice separation heaters ice making tray 11 may be provided as necessary, and an attachment position of the ice separation heater may also be varied. - In addition, the
ice separation heaters - The
temperature sensor 130 for measuring a temperature of theice making tray 11 is mounted at one side of theice making tray 11. Thetemperature sensor 130 is connected to the powercontrol operating system 140 to transmit a measured value thereto (seeFIG. 6 ). - Gears for transmitting a driving force of the
motor 110 to the shaft 13-1 of theejector 13 are provided above theice making tray 11, and the printed circuit board (PCB)position sensor 131 is inserted into any one gear of these gears and mounted thereat to detect a magnetic field of a magnet rotated together with the gear. Theposition sensor 131 is connected to the powercontrol operating system 140 and transmits the measured value thereto (seeFIG. 6 ). -
FIG. 6 is a block diagram of an ice maker according to a preferred embodiment of the present invention. - Referring to
FIG. 6 , the ice maker according to the preferred embodiment of the present invention includes an A/D converter, a powercontrol operating system 140, amotor 110 of anejector 100,ice separation heaters temperature sensor 130, aposition sensor 131, and atimer 132. - The power
control operating system 140 receives a supply of a current from a DC power unit, for example, the A/D converter, a rectifier, a smoothing circuit, or the like. - The power
control operating system 140 receives signals from thetemperature sensor 130 that measures a temperature of anice making tray 11 and transmits the measured value, theposition sensor 131, which is inserted into a gear for transmitting a driving force from themotor 110 to an ejector shaft 13-1, detects a magnetic field of a magnet rotated together with the gear and transmits a measured signal, and thetimer 132 notifies the powercontrol operating system 140 of a time elapsed from the start of an ice separating operation. - The power
control operating system 140 controls a current supplied to themotor 110 of theejector 100, thefirst heater 121, thesecond heater 122, acompressor 300, and a blowingfan 200 based on the signals received from thetemperature sensor 130, theposition sensor 131, and thetimer 132. - For example, the power
control operating system 140 may start an ice separating operation for discharging frozen ice from theice making tray 11 based on a signal measured by thetemperature sensor 130, and then cross-manage and distribute power of theice separation motor 110 of theejector 100 and theice separation heaters ice separation heaters ice separation motor 110 of theejector 100, and a current is supplied to theice separation heaters ice separation motor 110. For example, a current is supplied only to the ice separation heater after starting the ice separating operation, and, after ice is dissolved to a certain extent, a current is supplied only to theice separation motor 110 until ejector fins 13-2 approach the ice. Next, when the approach of the ejector fins 13-2 to the ice is completed, a current is supplied only to all of the ice separation heaters or thefirst heater 121. Next, a current is supplied only to themotor 110 in order to rotate the ejector fins 13-2 again, and when the ejector fins 13-2 arrive at the vicinity of a portion where thesecond heater 122 is installed, a current is supplied only to thesecond heater 122 again, and then a current is supplied only to themotor 110 again after a certain period of time has elapsed. - Alternatively, the power
control operating system 140 may mixedly manage and distribute the power of theice separation motor 110 and theice separation heaters control operating system 140 may increase or increase and then decrease the current supplied to theice separation motor 110 while the fins 13-2 of theejector 100 approach ice of theice making tray 11, pass through theice making tray 11, and make one revolution, and may decrease the current supplied to theice separation heaters - Alternatively, the power
control operating system 140 may simultaneously manage and distribute power of some of theice separation motor 110 and theice separation heaters control operating system 140 may increase or increase and then decrease the current supplied to theice separation motor 110 in a stepwise or continuous manner along each of steps including, for example, a step focusing on dissolving ice and a step focusing on discharging ice while the fins 13-2 of theejector 100 approach the ice of theice making tray 11, pass through theice making tray 11, and make one revolution, and may decrease the current supplied to theice separation heaters first heater 121 and thesecond heater 122 with a time difference therebetween. - In the above manner, by adjusting a current distribution amount between the
ice separation motor 110 and theice separation heaters ice making tray 11 immediately after ice is discharged from theice making tray 11 may be kept low, and thereby theice making tray 11 may be cooled again for subsequent ice-making within a shorter time. - Alternatively, the power
control operating system 140 may initially supply a larger amount of current to thefirst heater 121 than thesecond heater 122 after starting the ice separating operation, and increase the amount of current supplied to thesecond heater 122 while gradually decreasing the amount of current supplied to thefirst heater 121, or may supply a current to thesecond heater 122 without supplying a current to thefirst heater 121, that is, by turning thefirst heater 121 off. That is, the powercontrol operating system 140 may perform a supply of full load power and a supply of power below the full load power on the ice separation heaters for each condition. - By performing the supply of full load power and the supply of power below the full load power on the ice separation heaters for each condition, it is possible to further enhance the above-described effect.
- Alternatively, the power
control operating system 140 may receive a value of theposition sensor 131 after starting the ice separating operation and estimate the position of the fins 13-2 of theejector 13. The powercontrol operating system 140 may cross-manage and distribute the power of theice separation motor 110 and theice separation heaters ice separation motor 110 and theice separation heaters ice separation motor 110 and theice separation heaters ejector 13. - Alternatively, after the start of the ice separating operation, the power
control operating system 140 may use, for example, a signal from thetimer 132 and cross-manage and distribute the power of the above-describedice separation motor 110 andice separation heaters ice separation motor 110 and theice separation heaters ice separation motor 110 and theice separation heaters - Alternatively, after starting the ice separating operation, the power
control operating system 140 may use, for example, a signal from thetemperature sensor 130 and cross-manage and distribute the power of the above-describedice separation motor 110 andice separation heaters ice separation motor 110 and theice separation heaters ice separation motor 110 and theice separation heaters - Alternatively, after starting the ice separating operation, the power
control operating system 140 may more accurately estimate the position of the fins 13-2 using, for example, signals from any two or three of thetemperature sensor 130, theposition sensor 131, and thetimer 132 and cross-manage and distribute the power of the above-describedice separation motor 110 andice separation heaters ice separation motor 110 and theice separation heaters ice separation motor 110 and theice separation heaters - In addition, the power
control operating system 140 may use a method of managing and distributing the power of theice separation motor 110 and theice separation heaters compressor 300 and the blowingfan 200. For example, by cross-managing and distributing the power of theice separation heaters compressor 300, it is possible to cut off and control a current supplied to thecompressor 300 while a current is supplied to theice separation heaters - In the above manner, the power
control operating system 140 may operate a DC heater at maximum capacity using a limited DC current by managing and distributing power of the electronic components of the cooling device such as theice separation heaters compressor 300, and the like. -
FIG. 7 is a control block diagram of a refrigerator according to another embodiment of the present invention. - As shown in
FIG. 7 , a refrigerator 400 according to another embodiment of the present invention may include apower supply unit 421, amain control unit 420,electronic components 422, and anice maker 415. - The
electronic components 422 of the refrigerator may include at least one of acompressor motor 424 of a compressor (not shown) constituting a cooling cycle of refrigerator, a coldair blowing fan 423 disposed to be adjacent to an evaporator (not shown) constituting the cooling cycle, another cold air blowing fan (not shown) that is arranged inside the refrigerator to circulate cold air, and a heater that is arranged inside the refrigerator to remove, for example, frost. - The
main control unit 420 of the refrigerator may receive a supply of a current from thepower supply unit 421 and appropriately supply the received current to theelectronic components 422 and theice maker 415. Alternatively, themain control unit 420 may control power supplied directly from thepower supply unit 421 to theelectronic components 422 and theice maker 415. - The
ice maker 415 may include a tray (not shown) that receives a supply of liquid, an ejector (not shown) that discharges ice frozen in the tray, amotor 411 that provides a driving force to the ejector, anice separation heater 412 that applies heat to the tray, anice making sensor 413 that transmits a signal for determining a frozen state to acontrol unit 410, and thecontrol unit 410 that receives the signal of theice making sensor 413 and controls power supplied to theice separation heater 412 and themotor 411. - The
ice separation heater 412 may be any one of a planar heater, a cord heater, and a flexible heater. The planar heater may generate heat over a predetermined area. The planar heater may be manufactured in a thin form, for example, with a thickness of more than 0 and 1 mm or less. The planar heater may be manufactured in a thin form to reduce heat capacity thereof, and thereby quickly increase a temperature of the planar heater to a predetermined temperature. In this case, power consumption of the planar heater may be reduced. A positive temperature coefficient (PTC) heater may be used as the planar heater, but the present invention is not limited thereto. - In addition, the planar heater may include a heating body, a first insulating member that is provided to surround the heating body on one surface of the heating body, and a second insulating member that is provided to surround the heating body on the other surface of the heating body. For example, the heating body may be provided over the whole area of the planar heater in a zigzag form. A thin metal film such as a thin stainless film, a thin platinum film, a thin tungsten film, a thin nickel film, or the like may be used as the heating body, however, the heating body is not limited thereto. The heating body may be formed by performing thin film coating on carbon nano tubes, a carbon nano plate, or the like. A pad for receiving power from the outside may be provided at the heating body. The first insulating member and the second insulating member may be made of a polyimide or grapheme material. In this case, it is possible to stably protect the heating body even when a temperature of the heating body is increased to a high temperature or external shock is applied to the heating body. The first insulating member and the second insulating member may be provided in the form of a film. The first insulating member and the second insulating member may be respectively attached to one surface of the heating body and the other surface thereof.
- Meanwhile, the flexible heater may include a heat generating portion and an insulating portion that is formed to surround the heat generating portion. The heat generating portion is a portion that generates heat when a voltage is applied thereto. In the heat generating portion, a general heating wire (for example, a nickel-chrome wire, a copper-nickel wire, or the like) may be used. However, the heat generating portion is not limited thereto and may be provided in a form in which a glass fiber is wound around the heating wire or the heating wire is wound around a glass fiber. The insulating portion is a portion that forms an outer shell of the flexible heater and serves to protect the heat generating portion. The insulating portion may be made of a soft insulating material or an insulating material having elasticity. In this case, the flexible heater has a flexible property, and therefore the flexible heater may be brought into close contact with an ice tray accommodating ice, or the flexible heater may be coupled to the tray in a zigzag form. A cord heater, for example, is an example of the flexible heater, but the type of flexible heater is not limited thereto.
- The flexible heater includes the heat generating portion and the insulating portion, and therefore a diameter of the flexible heater may be formed to be smaller (for example, 2 to 4 mm) than that of a sheath heater. That is, the diameter of the flexible heater may be formed to be ⅓ to ½ the diameter of the sheath heater. The flexible heater has a small diameter and a flexible property, and therefore it is possible to increase an area in which the flexible heater comes into contact with the tray when the flexible heater is formed on an outer circumferential surface of the ice tray.
- The cord heater includes a connector for a power connection, a heat-generating cord heater wire, an attachment surface to which the cord heater wire is attached, electrothermal tape that adheres the cord heater wire and the attachment surface, and a connection terminal that connects a power input wire and the cord heater wire. Here, the cord heater wire is provided in a form in which a heat generating wire is wound around a glass fiber and an insulator for electrical insulation is wrapped around the resultant object. The connection terminal is formed by pressurizing a copper tube from an outside thereof to an inside thereof so that a radius thereof is decreased except for at both distal ends of the connection terminal in which the power input wire and the cord heater wire may be inserted and at a central area of the connection terminal in which the power input wire and the cord heater wire may be connected to each other. The power input wire and the cord heater wire are respectively inserted into both distal ends of the connection terminal obtained by pressurizing the copper tube in the above manner and connected to each other at the central area of the connection terminal. Next, a waterproof connection tube is mounted on the outside of the connection terminal to prevent penetration of moisture from the outside. The power input wire connected with the connector for power connection and the cord heater wire are connected by the connection terminal, and thereby the cord heater receives power from the connector for power connection.
- The
control unit 410 of theice maker 415 may receive a supply of a current through a power line from themain control unit 420 of the refrigerator 400. Thecontrol unit 410 may receive a signal of theice making sensor 413 to determine whether ice making is completed. When thecontrol unit 410 determines that ice making is completed, power may be supplied to theice separation heater 412 to enable theice separation heater 412 to apply heat to the tray. Meanwhile, when thecontrol unit 410 determines that ice making is completed, power may be supplied to themotor 411 simultaneously with the supply of power to theice separation heater 412 or after a certain period of time has elapsed. However, a method by which thecontrol unit 410 controls theice separation heater 412 and themotor 411 is not limited thereto and can be changed into various types. For example, thecontrol unit 410 may perform PWM control on the power supplied to theice separation heater 412. - In addition, when the
control unit 410 of theice maker 415 determines that ice making is completed, themain control unit 420 of the refrigerator 400 may recognize the completion of ice making. For example, thecontrol unit 410 of theice maker 415 transmits a signal to themain control unit 420 through the power line through which power is received from themain control unit 420 so that themain control unit 420 may recognize the completion of ice making while supplying power to theice separation heater 412. - Alternatively, when a signal indicating the completion of ice making is received from the
ice making sensor 413, thecontrol unit 410 of theice maker 415 may transmit a signal to themain control unit 420 through the power line so that themain control unit 420 may recognize the completion of ice making. - As described above, the
main control unit 420 that has received the signal from thecontrol unit 410 of theice maker 415 may stop or reduce a supply of power to at least one of theelectronic components 422, that is, the coldair blowing fan 423, thecompressor motor 424, and theheater 425, or change a corresponding frequency. - By the
main control unit 420 controlling theelectronic components 422 in the above manner, cold air circulation inside the refrigerator 400 may be decreased or a drop in a temperature of the cold air may be suppressed, and thus heat applied to the tray by theice separation heater 412 is not lost so that the ice separating operation may not be interrupted and the total power consumption of the refrigerator may be reduced or maintained at a constant level. - Hereinafter, the
ice maker 415 having a structure according to the present embodiment and operations of the refrigerator 400 will be described. - First, when the
control unit 410 of theice maker 415 determines that water accommodated in a tray is frozen using a signal from theice making sensor 413, an ice separating operation is started. Thecontrol unit 410 may supply power to theice separation heater 412 during the ice separating operation so that theice separation heater 412 may provide heat to the tray. At this point, thecontrol unit 410 of theice maker 415 may enable themain control unit 420 to recognize an operation of theice separation heater 412. For example, when supplying power to theice separation heater 412, thecontrol unit 410 of theice maker 415 may generate an ice separation start signal and transmit the ice separation start signal to themain control unit 420 through a power line for supplying power from themain control unit 420 to thecontrol unit 410. Alternatively, for example, thecontrol unit 410 of theice maker 415 may transmit a signal indicating a completion of ice making received from theice making sensor 413 to themain control unit 420. - In addition, during the ice separating operation, the
control unit 410 may provide power to themotor 411 for providing a driving force to an ejector so that the ejector may pressurize ice frozen in the tray to discharge the ice from the tray. At this point, thecontrol unit 410 of theice maker 415 may enable themain control unit 420 of the refrigerator to recognize an operation of themotor 411. For example, when power is supplied to themotor 411, thecontrol unit 410 may generate a signal indicating the supply of the power to themotor 411 and transmit the generated signal to themain control unit 420 of the refrigerator through the power line for supplying power from themain control unit 420 to thecontrol unit 410. - The
main control unit 420 may stop or reduce the supply of power to theelectronic components 422 of the refrigerator or change the corresponding frequency when themain control unit 420 recognizes that ice making in theice maker 415 is completed. -
FIG. 8 is a control block diagram of a refrigerator according to still another embodiment of the present invention. - As shown in
FIG. 8 , a refrigerator 400′ according to still another embodiment of the present invention is different from the refrigerator 400 according to another embodiment shown inFIG. 7 in that amain control unit 420 of the refrigerator 400′ may measure and control a current supplied to anice maker 415. - Hereinafter, focusing on differences with the refrigerator 400 according to another embodiment shown in
FIG. 7 , the refrigerator 400′ according to still another embodiment will be described. - The
main control unit 420 of the refrigerator measures a magnitude of a current of power supplied from themain control unit 420 to anice maker 415. Themain control unit 420 may compare the measured magnitude of the current with a predetermined value and determine that anice separation heater 412 of theice maker 415 is operated when the measured magnitude is equal to or larger than the predetermined value. Then, themain control unit 420 may reduce or stop a supply of power toelectronic components 422 or change a corresponding frequency. For example, themain control unit 420 may reduce power supplied to a coldair blowing fan 423, thereby reducing power consumption. Alternatively, themain control unit 420 may reduce or stop a supply of power to acompressor motor 424 or reduce a corresponding frequency. - In the above manner, when the magnitude of the current measured in the
main control unit 420 is equal to or larger than the predetermined value, themain control unit 420 of the refrigerator may determine that theice separation heater 412 is operated and reduce or stop a supply of power to the coldair blowing fan 423 and thecompressor motor 424 so that cold air circulation inside the refrigerator may be reduced or a drop in the temperature of the cold air may be suppressed. As a result, the heat applied to the tray by theice separation heater 412 is not lost so that the ice separating operation may not be interrupted and the total power consumption of the refrigerator may be maintained at a constant level. - In addition, the
main control unit 420 of the refrigerator may compare the measured magnitude of the current with a second predetermined value, and determine that themotor 411 for supplying a driving force to the ejector of theice maker 415 is operated when the measured magnitude is equal to or larger than the second predetermined value. Then, themain control unit 420 may reduce or stop a supply of power to theelectronic components 422, or change the corresponding frequency. For example, themain control unit 420 may reduce the power supplied to the coldair blowing fan 423, thereby reducing power consumption. Alternatively, themain control unit 420 may reduce or stop the supply of power to thecompressor motor 424 or reduce the corresponding frequency. - In this manner, when the magnitude of the current measured in the
main control unit 420 is equal to or larger than the second predetermined value, themain control unit 420 of the refrigerator may determine that themotor 411 of the ejector is operated, and reduce or stop the supply of power to the coldair blowing fan 423 and thecompressor motor 424 so that cold air circulation inside the refrigerator may be decreased or a drop in a temperature of the cold air may be suppressed, and therefore an ice separating operation may not be interrupted and a total power consumption of the refrigerator may be maintained at a constant level. - Although a few embodiments of the present disclosure have been shown and described, those skilled in the art should appreciate that changes may be made to these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
-
[Description of reference numerals] 10: Ice maker 11: Ice making tray 13: Ejector 13-1: Ejector shaft 13-2: Ejector fins 19: Ice bank 100: Ice maker 121: First heater 122: Second heater 130: Temperature sensor 131: Position sensor 132: Timer 140: Power control operating system 200: Blowing fan 300: Compressor 410: Control unit 411: Motor 412: Ice separation heater 413: Ice making sensor 415: Ice maker 420: Main control unit 421: Power supply unit 422: Electronic components 423: Cold air blowing fan 424: Compressor motor 425: Heater 400; 400′: Refrigerator
Claims (26)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2014-0075848 | 2014-06-20 | ||
KR20140075848 | 2014-06-20 | ||
KR1020140104992A KR20160020101A (en) | 2014-08-13 | 2014-08-13 | Ice-maker and refrigerator including the same |
KR10-2014-0104992 | 2014-08-13 | ||
PCT/KR2014/009704 WO2015194707A1 (en) | 2014-06-20 | 2014-10-16 | Ice maker, refrigerator comprising same, and method for controlling ice maker heater |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170089629A1 true US20170089629A1 (en) | 2017-03-30 |
Family
ID=54935676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/310,885 Abandoned US20170089629A1 (en) | 2014-06-20 | 2014-10-16 | Ice maker, refrigerator comprising same, and method for controlling ice maker heater |
Country Status (2)
Country | Link |
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US (1) | US20170089629A1 (en) |
WO (1) | WO2015194707A1 (en) |
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US20180017307A1 (en) * | 2016-07-13 | 2018-01-18 | Samsung Electronics Co., Ltd. | Ice maker and refrigerator having the same |
US20190226739A1 (en) * | 2018-01-19 | 2019-07-25 | Manitowoc Foodservice Companies, Llc | Ice-making machine that utilizes closed-loop harvest control with vibrational feedback |
EP3517864A1 (en) * | 2018-01-26 | 2019-07-31 | Lg Electronics Inc. | Ice maker and refrigerator including the same |
WO2021096586A1 (en) * | 2019-11-13 | 2021-05-20 | Electrolux Home Products, Inc. | Direct cooling ice maker |
US11022358B2 (en) | 2017-12-22 | 2021-06-01 | Electrolux Home Products, Inc. | Direct cooling ice maker |
CN113260826A (en) * | 2018-08-17 | 2021-08-13 | 伊利诺斯工具制品有限公司 | Wireless beam ice maker system |
US11131492B2 (en) | 2019-12-11 | 2021-09-28 | Midea Group Co., Ltd. | Dual direction refrigerator ice maker |
US20210341209A1 (en) * | 2018-10-02 | 2021-11-04 | Lg Electronics Inc. | Refrigerator |
US20210348823A1 (en) * | 2018-10-02 | 2021-11-11 | Lg Electronics Inc. | Refrigerator and control method therefor |
US11181309B2 (en) | 2017-12-22 | 2021-11-23 | Electrolux Home Products, Inc. | Direct cooling ice maker |
US20210372681A1 (en) * | 2018-10-02 | 2021-12-02 | Lg Electronics Inc. | Refrigerator and method for controlling same |
US20210381741A1 (en) * | 2018-10-02 | 2021-12-09 | Lg Electronics Inc. | Refrigerator and method for controlling the same |
US20210404722A1 (en) * | 2018-10-02 | 2021-12-30 | Lg Electronics Inc. | Refrigerator |
CN114739068A (en) * | 2018-01-16 | 2022-07-12 | 三星电子株式会社 | Ice making machine |
US20220260296A1 (en) * | 2019-07-29 | 2022-08-18 | Dae Chang Co., Ltd | Ice maker, refrigerator and control method of the same |
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US11674729B2 (en) | 2017-12-22 | 2023-06-13 | Electrolux Home Products, Inc. | Direct cooling ice maker |
US11181309B2 (en) | 2017-12-22 | 2021-11-23 | Electrolux Home Products, Inc. | Direct cooling ice maker |
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US10480843B2 (en) * | 2018-01-19 | 2019-11-19 | Manitowoc Foodservice Companies, Llc | Ice-making machine that utilizes closed-loop harvest control with vibrational feedback |
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CN113260826A (en) * | 2018-08-17 | 2021-08-13 | 伊利诺斯工具制品有限公司 | Wireless beam ice maker system |
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US20210372681A1 (en) * | 2018-10-02 | 2021-12-02 | Lg Electronics Inc. | Refrigerator and method for controlling same |
US20210404722A1 (en) * | 2018-10-02 | 2021-12-30 | Lg Electronics Inc. | Refrigerator |
US12111091B2 (en) * | 2018-10-02 | 2024-10-08 | Lg Electronics Inc. | Refrigerator |
US12111089B2 (en) * | 2018-10-02 | 2024-10-08 | Lg Electronics Inc. | Refrigerator |
US20210348823A1 (en) * | 2018-10-02 | 2021-11-11 | Lg Electronics Inc. | Refrigerator and control method therefor |
US11892220B2 (en) * | 2018-10-02 | 2024-02-06 | Lg Electronics Inc. | Refrigerator and method for controlling same |
US20210381741A1 (en) * | 2018-10-02 | 2021-12-09 | Lg Electronics Inc. | Refrigerator and method for controlling the same |
US11859888B2 (en) * | 2018-10-02 | 2024-01-02 | Lg Electronics Inc. | Refrigerator and control method therefor |
US20220357088A1 (en) * | 2019-06-26 | 2022-11-10 | Lg Electronics Inc. | Refrigerator and method for controlling the same |
US20220260296A1 (en) * | 2019-07-29 | 2022-08-18 | Dae Chang Co., Ltd | Ice maker, refrigerator and control method of the same |
CN114667426A (en) * | 2019-11-13 | 2022-06-24 | 伊莱克斯家用产品公司 | Direct cooling type ice maker |
WO2021096586A1 (en) * | 2019-11-13 | 2021-05-20 | Electrolux Home Products, Inc. | Direct cooling ice maker |
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