Refrigeration – Means producing shaped or modified congealed product – With raw material projector – e.g. – spray
Reexamination Certificate
2001-02-09
2002-10-29
Tapolcai, William E. (Department: 3744)
Refrigeration
Means producing shaped or modified congealed product
With raw material projector, e.g., spray
C062S353000
Reexamination Certificate
active
06470701
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to freezers, and, more particularly, to ice makers within freezers.
2. Description of the Related Art
The freezer portion of a refrigeration/freezer appliance often includes an ice cube maker which dispenses the ice cubes into a dispenser tray. A mold has a series of cavities, each of which is filled with water. The air surrounding the mold is cooled to a temperature below freezing so that each cavity forms an individual ice cube. As the water freezes, the ice cubes become bonded to the inner surfaces of the mold cavities.
In order to remove an ice cube from its mold cavity, it is first necessary to break the bond that forms during the freezing process between the ice cube and the inner surface of the mold cavity. In order to break the bond, it is known to heat the mold cavity, thereby melting the ice contacting the mold cavity on the outermost portion of the cube. The ice cube can then be scooped out or otherwise mechanically removed from the mold cavity and placed in the dispenser tray. A problem is that, since the mold cavity is heated and must be cooled down again, the time required to freeze the water is lengthened.
Another problem is that the heating of the mold increases the operational costs of the ice maker by consuming electrical power. Further, this heating must be offset with additional refrigeration in order to maintain a freezing ambient temperature, thereby consuming additional power. This is especially troublesome in view of government mandates which require freezers to increase their efficiency.
Yet another problem is that, since the mold cavity is heated, the water at the top, middle of the mold cavity freezes first and the freezing continues in outward directions. In this freezing process, the boundary between the ice and the water tends to push impurities to the outside of the cube. Thus, the impurities become highly visible on the outside of the cube and cause the cube to have an unappealing appearance. Also, the impurities tend to plate out or build up on the mold wall, thereby making ice cube removal more difficult.
A further problem is that vaporization of the water in the mold cavities causes frost to form on the walls of the freezer. More particularly, in a phenomenon termed “vapor flashing”, vaporization occurs during the melting of the bond between the ice and the mold cavity. Moreover, vaporization adds to the latent load or the water removal load of the refrigerator.
Yet another problem is that the ice cube must be substantially completely frozen before it is capable of withstanding the stresses imparted by the melting and removal processes. This limits the throughput capacity of the ice maker.
Still another problem is that the fill tube coupled with the mold may jet water into the mold such that the water splatters from the mold cavity into an adjacent portion of the freezer unit. This obviously is not desirable since the splattered water then freezes and may interfere or reduce the efficiency of the ice maker or other components in the freezer unit.
What is needed in the art is an ice maker which quickly and effectively fills a mold cavity with water without splattering the water into adjacent portions.
SUMMARY OF THE INVENTION
The present invention provides a fill tube for an automatic ice maker which is structured and arranged relative to at least one mold cavity and an auger within the mold cavity to quickly and effectively fill the mold cavity without splattering water out of the mold.
The invention comprises, in one form thereof, an ice maker including a mold with at least one cavity for containing water therein for freezing into ice. Each cavity has a plurality of side walls. An ice removal device is positioned at least partly within the at least one mold cavity. A fill tube is positioned in association with the at least one mold cavity. The fill tube includes an outlet from which water is expelled at an impingement angle against at least one side wall of at least one mold cavity. The impingement angle is between about 10° and 60° relative to a horizontal reference.
The invention comprises, in another form thereof, a method of making ice in an automatic ice maker, including the steps of: providing a mold including at least one cavity, each cavity having a plurality of side walls; positioning an ice removal device at least partly in the at least one mold cavity; coupling a fill tube with the at least one mold cavity, the fill tube having an outlet; and expelling water from the outlet from an impingement angle against at least one side wall of the at least one mold cavity, the impingement angle being between 10° and 60° relative to a horizontal reference.
An advantage of the present invention is that the fill tube is structured and arranged relative to the mold to provide a fast fill cycle of water within the mold cavity.
Another advantage is that the mold cavity is filled without splattering water into an adjacent portion of the freezer unit.
Yet another advantage is that the fill tube may be quickly and easily assembled with the mold using barbed fasteners.
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Cox Robert G.
De Witt Donald E.
Tchougounov Andrei
Dekko Heating Technologies, Inc.
Tapolcai William E.
Taylor & Aust P.C.
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