Patent Abstract:
A refrigerator includes a refrigerator cabinet, a refrigerator compartment disposed within the refrigerator cabinet, a refrigerator compartment door for providing access to the refrigerator compartment, an ice maker on the refrigerator compartment door, a thermoelectric cooler associated with the ice maker and operatively connected to the refrigerator compartment door, the thermoelectric cooler having a first side and an opposite second side, and a cooling loop operatively connected to the refrigerator compartment door and configured for cooling the thermoelectric cooler.

Full Description:
FIELD OF THE INVENTION 
     The present invention relates to ice makers. More particularly, but not exclusively, the present invention relates to cooling an ice maker on a door of a refrigerator. 
     BACKGROUND OF THE INVENTION 
     Refrigerators have long provided for making ice. Some refrigerators include ice makers on a door of the fresh food compartment. Yet, problems remain with cooling the ice makers and or ice storage bins. What is needed is a refrigerator which provides for on the door ice maker cooling. 
     SUMMARY 
     Therefore, it is a primary object, feature, or advantage of the present invention to improve over the state of the art. 
     It is a further object, feature, or advantage of the present invention to provide a refrigerator which provides for on the door cooling. 
     Yet another object, feature, or advantage of the present invention is to provide a refrigerator which may make clear ice. 
     One or more of these and/or other objects, features, or advantages of the present invention will become apparent from the specification and claims that follow. No single embodiment need meet or provide each and every object, feature, or advantage. Different embodiments may have different objects, features, or advantages. The present invention is not to be limited by or to these objects, features, or advantages. 
     According to one aspect, a refrigerator is provided. The refrigerator includes a refrigerator cabinet, a refrigerator compartment disposed within the refrigerator cabinet, a refrigerator compartment door for providing access to the refrigerator compartment, an ice maker on the refrigerator compartment door, a thermoelectric cooler associated with the ice maker and operatively connected to the refrigerator compartment door, the thermoelectric cooler having a first side and an opposite second side, and a cooling loop operatively connected to the refrigerator compartment door and configured for cooling the thermoelectric cooler. The refrigerator may further include a heat sink thermally coupled with one of the first side and the opposite second side. There may be cooling media within the cooling loop such as glycol and/or water. The cooling loop may further provide for heating water to provide heated water. The refrigerator may further include a dispenser on the refrigerator compartment door and adapted to dispense the heated water. 
     According to another aspect, a method of making ice on a door of a refrigerator is provided. The method includes providing a refrigerator, the refrigerator having a refrigerator cabinet, a refrigerator compartment disposed within the refrigerator cabinet, a refrigerator compartment door for providing access to the refrigerator compartment, an ice maker on the refrigerator compartment door, a thermoelectric cooler associated with the ice maker and operatively connected to the refrigerator compartment door, the thermoelectric cooler having a first side and an opposite second side, and a cooling loop operatively connected to the refrigerator compartment door. The method further provides for cooling a surface associated with the ice maker using the first side of the thermoelectric cooler. The method further provides for circulating cooling media through the cooling loop to cool the second side of the thermoelectric cooler. The method may further include cooling water by circulating the cooling media through the cooling loop. The method may further include heating water or ice by circulating the cooling media through the cooling loop. The refrigerator may further include a fan associated with the refrigerator compartment door and further comprising altering temperature in the refrigerator compartment door using the fan. 
     According to another aspect, a refrigerator is provided. The refrigerator may include a refrigerator cabinet, a refrigerator compartment disposed within the refrigerator cabinet, a refrigerator compartment door for providing access to the refrigerator compartment, an ice maker on the refrigerator compartment door, and a fluid cooled thermoelectric cooler associated with the ice maker and operatively connected to the refrigerator compartment door. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of one example of a refrigerator of the present invention. 
         FIG. 2  is a perspective view of the refrigerator of  FIG. 1  with the French doors in an open position. 
         FIG. 3  is a perspective view of one example of an ice maker of the present invention. 
         FIG. 4  is a cross-sectional view of the ice maker of  FIG. 3  taken along section line  4 - 4 . 
         FIG. 5  is a cross-sectional view of the ice maker of  FIG. 3  taken along section line  5 - 5 . 
         FIG. 6  is an end view of the ice maker showing an inlet and outlet for the fluid loop. 
         FIG. 7  is an exploded view of the ice maker. 
         FIG. 8  is a diagram illustrating one example of a fluid loop. 
         FIG. 9  is a diagram illustrating another example of a fluid loop. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       FIG. 1  illustrates one embodiment of a refrigerator of the present invention. In  FIG. 1  a refrigerator  10  has a bottom mount freezer with French doors. It is should be understood that the present invention may be used in other configurations including side-by-side refrigerator configurations and other types of configurations, especially where an ice maker and/or ice storage is on a door providing access to a fresh food compartment. The refrigerator  10  has a refrigerator cabinet  12 . One or more compartments are disposed within the refrigerator cabinet  12 . As shown in  FIG. 1 , a fresh food compartment  14  is shown with French doors  16 ,  18  providing access to the fresh food compartment  14 . Mounted on the door  16  is a water and ice dispenser  20 . Below the fresh food compartment  14  is a freezer compartment  22  which may be accessed by pulling drawer  24  outwardly. 
       FIG. 2  illustrates the refrigerator  10  of  FIG. 1  with French doors  16 ,  18  in an open position. Mounted on the French door  16  is an ice making compartment  30  in which an ice maker  32  and an ice storage bucket  34  may be disposed. Note the ice making compartment as shown in  FIG. 2  is within the refrigeration or fresh food compartment  14 . 
       FIG. 3  illustrates one example of an ice maker  32  where a liquid cooled system is used for freezing water into ice. An ice mold  40  is positioned above a thermoelectric cooler (TEC). The ice mold  40  is preferably fixed in place during harvesting of the ice.  FIG. 4  illustrates an end view of the ice maker showing the thermoelectric cooler  46  with electrical inputs  42 ,  44  shown. Fluid is shown in fluid line  48  which is in contact with a bottom side  50  of the thermoelectric cooler  46 . The fluid line  48  comprises a plurality of channels  51  at least partially separated by a plurality of fins  53 . Thus, in operation fluid within the fluid line  48  can remove heat from the thermoelectric cooler  46 .  FIG. 5  provides another illustration where one or more thermoelectric coolers  46  are used to remove heat from an ice maker using liquid cooling. During harvest, heat may be provided to the ice mold. The heat may be provided through the thermoelectric cooler or through warm fluid through the fluid line  48 . 
       FIG. 6  is an end view of the ice maker  32 . The ice maker  32  has a fluid inlet  60  and a fluid outlet  62  for the fluid loop. 
       FIG. 7  is an exploded view of the ice maker  32 . The ice maker  32  has a flex grid  70  which sits inside a molded tray wall  72 . A tray cold plate  40  is also shown along with a gasket  74  with openings for thermoelectric devices  46 . A transfer plate  76  is also provided as is a transfer cover  78  and a seal  80  for sealing the transfer cover  78  to the transfer plate  76 . A harvest assembly  82  is shown which may be used for harvesting ice from the ice maker  32 . 
       FIG. 8  is a diagram illustrating one example of a fluid loop  88  through the ice maker  32  with thermo electric coolers  46 . Fluid is received through the fluid inlet  60  for cooling the thermo electric coolers  46 . As a result of the cooling process the temperature of the fluid increases so that fluid leaving the ice maker  32  at the fluid outlet  62  may be warm. A pump  90  may be placed within the fluid loop  88  to pump the fluid through the fluid loop  88 . A heat exchanger  92  is provided which provides for removing heat from the fluid in the fluid loop  88 . Heat may be removed in any number of ways. For example, a fan may be used to drive cooling air from any number of sources to cool fluid within the fluid loop  88 , although any number of types and configurations of heat exchangers may be used. 
       FIG. 9  is a diagram illustrating another example of a fluid loop  88  through the ice maker  32  with thermo electric coolers  46 . Fluid such as water is received through the fluid inlet  60  for cooling the thermo electric coolers  46 . As a result of the cooling process the temperature of the fluid increases so that fluid leaving the ice maker  32  at the fluid outlet  62  may be warm. A valve  94  is shown which allows for the warm fluid to be released to a water dispenser or otherwise. It is to be understood that the warm fluid is not necessarily hot but may be, for example, room temperature. Thus, room temperature water may be dispensed for drinking or other purposes without needing to provide additional heating or else the warm water may be further heated using only a limited amount of additional energy to provide an even higher temperature. Thus, energy savings can be achieved in this way as well. The valve  94  which may be electronically controlled allows a portion of the warm water to be directed to the water dispenser or otherwise and a remaining portion of the water to be circulated to the heat exchanger  92 . Because water may be removed from the fluid loop  88  at the valve  94 , another valve  96  is provided which allows for additional fluid to be added to the system. The valve  96  as shown is positioned after the heat exchanger  92 , although depending upon temperature of fluid being added, fluid could be added elsewhere in the loop  88 . 
     Thus, the present invention provides for using a thermoelectric cooler to be used in making ice. The ice maker may reside in the refrigerator compartment at above freezing temperature, particularly where clear ice is desired. Alternatively, the ice maker may reside in the freezer compartment. 
     Therefore, a refrigerator which provides for on the door cooling has been provided. The present invention contemplates numerous variations including the number and placement of thermoelectric coolers where used, the manner in which fluid cooling is used, the type of cooling fluid, the placement of the ice maker, and other options, variations, and alternatives. In general, the present invention is only intended to be limited by the scope of the following claims.

Technology Classification (CPC): 5