Patent Abstract:
A refrigerator and a method of making shaved ice by controlling a period during which ice is fed into an ice-shaving compartment, thereby preventing ice from overflowing the ice-shaving compartment and preventing the ice-shaving compartment from being broken due to an excessive amount of ice. The method of making shaved ice comprises feeding cubed ice stored in an ice-storing unit mounted in a freezing compartment to a shaved ice-making unit mounted at a discharge port side of the ice-storing unit though an ice-feeding unit to make shaved ice, setting a driving time for the shaved ice-making unit, and setting a driving time for the ice-feeding unit. The driving time for the shaved ice-making unit is longer than the driving time for the ice-feeding unit.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION  
       [0001]     This application claims the benefit of Korean Patent Application No. 2004-78096, filed on Sep. 30, 2004 and Korean Patent Application No. 2005-83474, filed on Sep. 8, 2005 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.  
       BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present invention relates to a refrigerator and a method of making shaved ice, and, more particularly, to a refrigerator and a method of making shaved ice that is capable of controlling a feeding rate of ice, whereby the ice is fed in the optimum quantity necessary to make shaved ice.  
         [0004]     2. Description of the Related Art  
         [0005]     Generally, a refrigerator includes a refrigerating compartment and a freezing compartment, which are operated at different temperatures. Some of the cool air generated from an evaporator of the freezing compartment is supplied to the refrigerating compartment, or an additional evaporator is disposed in the refrigerating compartment to lower the temperature in the refrigerating compartment. Therefore, foods are maintained in a fresh state in the refrigerator.  
         [0006]     Recently, there has been increasingly used a refrigerator with an ice/water dispenser that allows cold water or ice to be taken out of the refrigerator without opening a door of the refrigerator, as a quality and a capacity of the refrigerator is increased. There has also been proposed another refrigerator with an ice shaver to shave cubed ice made in the freezing compartment into shaved ice, and then discharge the shaved ice out of the freezing compartment, which eliminates the necessity of an additional ice-shaving unit to make ice water.  
         [0007]     The ice shaver of the refrigerator is disposed under the discharge port of an ice bucket to store cubed ice made by an ice shaver, and the cubed ice discharged from the ice bucket is shaved into shaved ice by the ice shaver. The ice bucket has a spiral feeding unit to feed the stored ice to the discharge port. The feeding unit is connected to an ice-feeding motor, which is disposed at the rear of the ice bucket. In the ice shaver is defined an ice-shaving compartment. The ice-shaving compartment has an ice shaving cutter and a discharge port. Cubed ice discharged from the ice bucket is shaved into shaved ice by the ice-shaving cutter, and the shaved ice is discharged through the discharge port. To the ice shaver is connected to a shaved ice-making motor to drive the ice shaver. In  FIG. 1 , a method of making shaved ice includes in operation  10 , using a control unit to determine whether a shaved ice-making signal is input when a user pushes a shaved ice-making button to make ice water. When it is determined in operation  10 , that the shaved ice-making signal is input, the process moves to operations  20  and  30 , where the control unit outputs a control signal to a shaved ice-making motor and an ice-feeding motor to drive the shaved ice-making motor and the ice-feeding motor.  
         [0008]     The ice-feeding motor feeds cubed ice in the ice bucket to an ice-shaving compartment, where the cutter disposed in the ice-shaving compartment is operated by means of the shaved ice-making motor to shave the fed cubed ice into shaved ice. The shaved ice is discharged out of the ice-shaving compartment through the discharge port.  
         [0009]     From operation  30 , the process moves to operation  40 , where the control unit determines whether a predetermined amount of shaved ice has been made. When it is determined in operation  40 , that the predetermined amount of shaved ice has been made, the process moves to operation  50 , where the control unit outputs a stop signal to the shaved ice-making motor and the ice-feeding motor, and the shaved ice-making motor and the ice-feeding motor are stopped.  
         [0010]     As shown in  FIG. 2 , in the conventional method of making shaved ice, the shaved ice-making motor and the ice-feeding motor are operated at the same time when the shaved ice-making signal is input to the shaved ice-making motor and the ice-feeding motor, and the shaved ice-making motor and the ice-feeding motor are stopped at the same time when the predetermined amount of shaved ice has been made.  
         [0011]     Other ice shavers for refrigerators are disclosed in detail in Korean Unexamined Patent Publication No. 1999-40637 and Korean Registered Patent Publication No. 10-360863.  
         [0012]     In the conventional method of making shaved ice, however, the ice-feeding motor is operated simultaneously when the shaved ice-making motor is operated. As a result, ice is continuously fed to the ice-shaving compartment, and therefore, the amount of the ice is excessively increased. The excessive amount of ice may overflow the ice-shaving compartment, or may even break the ice shaver.  
         [0013]     Furthermore, a large amount of ice is left in the ice shaver after the shaved ice has been made, since the ice is continuously fed until the making of the shaved ice is completed. As a result, the ice left in the ice shaver may mass into a lump, or the ice left in the ice shaver may thaw into water, which may drop out of the refrigerator.  
       SUMMARY OF THE INVENTION  
       [0014]     Accordingly, it is an aspect of the present invention to provide a refrigerator and a method of making shaved ice that is capable of controlling a feeding period during which ice is fed into an ice shaver, thereby preventing ice from overflowing the ice shaver and preventing the ice shaver from being broken due to an excessive amount of ice.  
         [0015]     Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.  
         [0016]     The foregoing and/or other aspects of the present invention are achieved by providing a refrigerator and a method of making shaved ice, capable of minimizing an amount of ice left in the ice shaver after shaved ice has been made, thereby preventing the ice left in the ice shaver from massing into a lump, or preventing the ice left in the ice shaver from thawing into water, which may drop out of the refrigerator.  
         [0017]     It is an aspect of the present invention to provide a method of making shaved ice including feeding cubed ice stored in an ice-storing unit mounted in a freezing compartment to a shaved ice-making unit mounted at a discharge port side of the ice-storing unit though an ice-feeding unit to make shaved ice, the method further including setting a driving time for the shaved ice-making unit, and setting a driving time for the ice-feeding unit, wherein the driving time for the shaved ice-making unit is longer than the driving time for the ice-feeding unit.  
         [0018]     The method further includes performing a controlling operation such that the ice-feeding unit is stopped earlier than the shaved ice-making unit.  
         [0019]     The method further includes further driving the shaved ice-making unit for a predetermined period after the ice-feeding unit is stopped.  
         [0020]     The method further includes repeatedly driving and stopping the ice-feeding unit while driving the shaved ice-making unit continuously.  
         [0021]     The method further includes driving the ice-feeding unit for a predetermined first period, and then stopping for a predetermined second period, while driving the shaved ice-making unit continuously, thereby repeatedly driving and stopping the ice-feeding unit.  
         [0022]     The method further includes further driving the shaved ice-making unit for a predetermined third period after the predetermined period elapses to make cubed ice.  
         [0023]     The method further includes stopping the ice-feeding unit after the ice-feeding unit is driven for a predetermined number of times.  
         [0024]     The method further includes further driving the shaved ice-making unit for a predetermined third period after the predetermined period elapses to make cubed ice.  
         [0025]     It is another aspect of the present invention to provide a method of making shaved ice including feeding cubed ice stored in an ice-storing unit mounted in a freezing compartment to a shaved ice-making unit mounted at a discharge port side of the ice-storing unit though an ice-feeding unit to make shaved ice, the method further including driving the shaved ice-making unit for a predetermined period, and controlling the ice-feeding unit such that the ice-feeding unit is repeatedly driven and stopped for the predetermined period.  
         [0026]     The method further includes driving the ice-feeding unit for a predetermined first period, and then stopping for a predetermined second period, while driving the shaved ice-making unit, thereby repeatedly driving and stopping the ice-feeding unit for the predetermined period.  
         [0027]     The method further includes immediately stopping the ice-feeding unit, without stopping the ice-feeding unit for the predetermined second period, after the ice-feeding unit is driven for a predetermined number of times.  
         [0028]     It is another aspect of the present invention to provide a refrigerator including an ice shaver mounted in a freezing compartment to make ice, an ice-storing unit to store the ice made by the ice shaver, an ice-feeding unit to feed the ice stored in the ice-storing unit to the outside of the ice-storing unit, a shaved ice-making unit to receive the ice from the ice-feeding unit and to make the ice into shaved ice, and a control unit to perform a controlling operation such that the shaved ice-making unit is driven for a longer period than the ice-feeding unit.  
         [0029]     The control unit performs a controlling operation such that the ice-feeding unit is stopped earlier than the shaved ice-making unit.  
         [0030]     The control unit performs a controlling operation such that the ice-feeding unit is driven for a predetermined first period, and is then stopped for a predetermined second period, while the shaved ice-making unit is driven, the ice-feeding unit being repeatedly driven and stopped.  
         [0031]     The control unit drives the shaved ice-making unit for a predetermined period, drives the ice-feeding unit for a predetermined first period, and then stops the ice-feeding unit for a predetermined second period, the ice-feeding unit being repeatedly driven and stopped for the predetermined period, and further drives the shaved ice-making unit for a predetermined third period after the predetermined period elapses. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0032]     These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, of which:  
         [0033]      FIG. 1  is a flow chart illustrating a conventional method of making shaved ice;  
         [0034]      FIG. 2  is a graph respectively illustrating driving time for a shaved ice-making motor and an ice-feeding motor according to the conventional art;  
         [0035]      FIG. 3  is a sectional view schematically illustrating an inner structure of a refrigerator according to an embodiment of the present invention;  
         [0036]      FIG. 4  is a block diagram illustrating components of the refrigerator shown in  FIG. 3 ;  
         [0037]      FIG. 5  is a graph respectively illustrating a driving time for a shaved ice-making motor and an ice-feeding motor according to an embodiment of the present invention; and  
         [0038]      FIG. 6  is a flow chart illustrating a method of making shaved ice in the refrigerator shown in  FIG. 4 . 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0039]     Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.  
         [0040]     In  FIGS. 3 and 4 , a refrigerator according to the present invention comprises a housing  1  having an open front part, a freezing compartment door  2  and a refrigerating compartment door (not shown) hinged to the open front part of the housing  1 . The housing  1 , the freezing compartment door  2 , and the refrigerating compartment door together form the external appearance of the refrigerator. In the housing  1  are partitioned a freezing compartment  4  and a refrigerating compartment (not shown), which are opened/closed by means of the freezing compartment door  2  and the refrigerating compartment door.  
         [0041]     To the rear wall of the housing  1  is mounted an evaporator  5  to generate cool air. At the lower rear part of the housing  1  is disposed a compressor  6  to compress refrigerant. At the upper part of the freezing compartment  4  is disposed an automatic ice shaver  10  to automatically make and feed cubed ice of a predetermined size.  
         [0042]     The automatically ice shaver  10  comprises an ice-making container  11  to make ice with water supplied to the ice-making container  11 , an ice-storing container  20  disposed below the ice-making container  11  to store cubed ice made at the ice-making container  11 , and a water-supplying pipe  12  connected to an external water-supplying source (not shown) and extending above the ice-making container  11  to supply water necessary to make ice to the ice-making container  11 .  
         [0043]     To the freezing compartment door  2  is mounted a shaved ice-making unit  30  to make the cubed ice fed from the ice-storing container  20  into shaved ice and supply the shaved ice. At the freezing compartment door  2  are formed a recess  17  where the shaved ice-making unit  30  is disposed, and a shaved ice-discharging port  13 . At the ice-storing container  20  is disposed a cubed ice-feeding unit  50  to feed the cubed ice to the shaved ice-making unit  30 . At the rear of the cubed ice-feeding unit  50  is mounted an ice-feeding motor  51  to drive the cubed ice-feeding unit  50 .  
         [0044]     When a predetermined time period elapses after water is filled in the ice-making container  11  through the water-supplying pipe  12 , the water in the ice-making container  11  is frozen into cubed ice by means of cool air circulating in the freezing compartment  4 . The cubed ice is automatically fed to the ice-storing container  20 .  
         [0045]     When a user inputs a shaved ice-making signal, the ice-feeding unit  50  and the shaved ice-making unit  30  are operated such that shaved ice is discharged out of the freezing compartment door through the shaved ice-discharging port  13 .  
         [0046]     The ice-feeding unit  50  is connected to the ice-feeding motor  51 , which is mounted at one end of the ice-storing container  20 , to feed the cubed ice stored in the ice-storing container  20  to the shaved ice-making unit  30  disposed at the freezing compartment door.  
         [0047]     Specifically, the shaved ice-making unit  30  is disposed inside the freezing compartment door. The shaved ice-making unit  30  comprises a shaved ice-making motor  32  fixed to the recess  17 , which communicates with the shaved ice-discharging port  13 , while being disposed at the outside inner space of the freezing compartment door a reduction gear assembly  33  disposed above the shaved ice-making motor  32 , a case  34  fixedly fitted in the inner space of the freezing compartment door, and a rotary tub  35  rotatably disposed in the case  34 .  
         [0048]     The reduction gear assembly  33 , which is connected to the shaved ice-making motor  32  via a shaft, comprises a plurality of reduction gears (not shown), which are engaged with each other for properly reducing the rotation speed of the shaved ice-making motor  32 .  
         [0049]     The rotary tub  35 , which has open upper and lower ends, is provided at the inner circumference thereof with a spiral wing  37 . To the bottom of the case  34 , in which the rotary tube  35  is rotatably fitted, is fixed a cutting blade  41 , which cooperates with the spiral wing  37  such that the spiral wing  37  is rotated to make shaved ice.  
         [0050]     As shown in  FIG. 4 , the refrigerator according to the present invention further comprises a key input unit  61  to allow the user to select the amount of shaved ice to be made or a predetermined time period for which the shaved ice is to be made and a control unit  60  to control various units of the refrigerator.  
         [0051]     When a shaved ice-making signal is input to the control unit  60 , the control unit  60  outputs a driving signal to the shaved ice-making motor  32  and the ice-feeding motor  51  such that the shaved ice-making motor  32  and the ice-feeding motor  51  are operated to make shaved ice. As the ice-feeding motor  51  is operated, cubed ice stored in the ice-storing container  20  is fed to the shaved ice-making unit  30  by means of the ice-feeding unit  50 . When the cubed ice is introduced into the shaved ice-making unit  30 , the cubed ice is shaved into shaved ice by means of the cutting blade  41  disposed at the bottom of the case  34  while being rotated in the rotary tube  35  by means of the spiral wing  37  formed at the rotary tube  35  as the shaved ice-making motor  32  is operated.  
         [0052]     In this way, cubed ice fed by means of the ice-feeding motor  51  is made into shaved ice by means of the shaved ice-making motor  32 . If the cubed ice is continuously fed to the shaved ice-making unit  30 , the cubed ice in the shaved ice-making unit  30  is unnecessarily increased. As a result, the cubed ice may overflow the shaved ice-making unit  30 , or the shaved ice-making unit  30  may be broken by the cubed ice. For this reason, driving time for the shaved ice-making motor  32  and the ice-feeding motor  51  is controlled as is shown in  FIG. 5 .  
         [0053]     While the shaved ice-making motor  32  is operated for a predetermined period TM 1  after the shaved ice-making signal is input, the ice-feeding motor  51  is driven for a predetermined first reference period T 1  such that cubed ice is fed to the shaved ice-making unit  30 , and then the ice-feeding motor  51  is stopped for a predetermined second reference period T 2  such that an appropriate amount of ice is fed to the shaved ice-making unit  30 . Although the feed of the ice is interrupted for the second reference period, shaved ice is continuously made for the first reference period T 1  and the second reference period T 2 . After the second period T 2  elapses, the ice-feeding motor  51  is driven for the first period T 1  such that cubed ice is fed to the shaved ice-making unit  30 , and then the ice-feeding motor  51  is stopped for the second period T 2  such that the cubed ice fed to the shaved ice-making unit  30  for the first period T 1  is made into shaved ice. The above procedure is repeatedly carried out.  
         [0054]     After the ice-feeding motor  51  is driven by a predetermined number of times N, the ice-feeding motor  51  is completely stopped. In this case, the shaved ice-making motor  32  is further operated for a predetermined third reference period T 3  such that the cubed ice remaining in the shaved ice-making unit  30  is discharged out of the shaved ice-making unit  30 .  
         [0055]     The first reference period, the second reference period, the third reference period, and the number of times may vary depending on which mode the shaved ice is made in. The values are previously calculated on the basis of the corresponding mode, and stored in the control unit  60 . For example, when a user pushes a one-serving selection button to make the shaved ice corresponding to one serving of ice water with red bean, the shaved ice-making motor  32  is driven for 52 seconds. At this time, the ice-feeding motor  51  is driven for 3 seconds (T 1 ) and then stopped for 4 seconds (T 2 ). This procedure is repeatedly carried out. Specifically, the ice-feeding motor  51  is repeatedly driven for 3 seconds (T 1 ) by 8 times N, and is then repeatedly stopped for 4 seconds (T 2 ) by 7 times. In this way, the ice-feeding motor  51  is repeatedly driven and stopped for 52 seconds. The shaved ice-making motor  32  is further operated for 4 seconds (T 3 ) to made shaved ice.  
         [0056]     Now, a method of making shaved ice in the refrigerator shown in  FIG. 4  will be described with reference to  FIGS. 5 and 6 .  
         [0057]     In  FIG. 5 , in operation  100 , when a user selects a shaved ice-making mode using the key input unit  61 , and then inputs a shaved ice-making signal, the control unit  60  determines whether the shaved ice-making signal is input through the key input unit  61 .  
         [0058]     When the shaved ice-making signal is input in operation  100 , the process moves to operation  110  where the user sets the third reference period T 3 , for which the shaved ice-making motor  32  will be further operated, on the basis of the shaved ice-making mode. The set third period is transmitted to the shaved ice-making motor  32 . From operation  110 , the process moves to operation  120 , where the first period T 1 , for which the ice-feeding motor  51  is driven, the second period T 2 , for which the ice-feeding motor  51  is stopped, and the number of times N, for which the ice-feeding motor  51  is driven, are set. The set first period, the set second period, and the set number of times are transmitted to the ice-feeding motor  51 .  
         [0059]     After the mode of controlling the shaved ice-making motor  32  and the ice-feeding motor  51  has been set in operations  110  and  120 , the process moves to operation  130 , where the shaved ice-making motor  32  is driven. At the same time, in operation  140 , the ice-feeding motor  51  is also driven. As the shaved ice-making motor  32  and the ice-feeding motor  51  are driven, shaved ice is made according to the above shaved ice-making mode. From operation  140 , the process moves to operation  150 , where the control unit  60  determines whether the first period T 1  has elapsed after the ice-feeding motor  51  is driven. When it is determined in operation  150 , that the first period T 1  has elapsed, the process moves to operation  160 , where the ice-feeding motor  51  is stopped.  
         [0060]     From operation  160 , the process moves to operation  170 , where the control unit  60  determines whether the ice-feeding motor  51  has been repeatedly driven by the predetermined number of times N. Since the ice-feeding motor  51  has been driven once, in operation  180 , the microcomputer determines whether the second period T 2  has elapsed after the ice-feeding motor  51  is stopped. After the ice-feeding motor  51  has been stopped for the second period T 2 , the ice-feeding motor  51  is driven again for first period T 1 . This procedure is repeatedly carried out.  
         [0061]     After the ice-feeding motor  51  has been driven for the predetermined number of times N, the ice-feeding motor  51  is completely stopped, and from operation  170 , the process moves to operation  190 , where the shaved ice-making motor  32  is further driven for the third period T 3  such that the cubed ice remaining in the shaved ice-making unit  30  is made into shaved ice and then the shaved ice is discharged out of the shaved ice-making unit  30 .  
         [0062]     As apparent from the above description, the ice-feeding unit is repeatedly driven and stopped to prevent ice from being excessively fed into the shaved ice-making unit. Consequently, the present invention has the effect of preventing ice from overflowing the shaved ice-making unit and preventing the shaved ice-making unit from being broken.  
         [0063]     Furthermore, the shaved ice-making motor is further driven after the cubed ice-feeding unit is stopped to minimize the amount of ice left in the shaved ice-making unit. Consequently, the present invention has the effect of preventing the ice left in the shaved ice-making unit from massing into a lump, or preventing the ice left in the shaved ice-making unit from thawing into water, which may drop out of the refrigerator.  
         [0064]     Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Technology Classification (CPC): 5