Layered ICE Maker Appliance

The present subject matter relates generally to ice maker appliances, and in particular to ice maker appliances configured to produce layered ice, e.g., ice pieces comprising two or more distinct layers.

Certain refrigerator appliances include an ice maker. An ice maker appliance may also be a stand-alone appliance designed for use in commercial and/or residential settings. To produce ice, liquid water is directed to the ice maker and frozen. For example, certain ice makers include a mold body for receiving liquid water. In some systems, a working fluid is used to directly cool the mold body, e.g., by conductive heat transfer. In other systems, the air around the mold body may be cooled such that the mold body is indirectly cooled via the air. When the mold body is cooled, directly and/or indirectly, ice may be formed from the liquid water therein. After ice is formed in the mold body, it may be harvested from the mold body and stored within an ice bin or bucket within the refrigerator appliance.

Conventional ice maker appliances are configured for producing monolithic, homogenous ice pieces solely from water, e.g., tap water or water from other similar sources. Thus, the resulting ice from such ice maker appliances may be perceived as bland and lacking in visual aesthetic appeal. Thus, there is a desire for ice maker appliances which can produce enhanced ice.

Accordingly, an ice maker with features for producing layered ice pieces would be desirable.

Aspects and advantages of the invention will be set forth in part in the following description, or may be apparent from the description, or may be learned through practice of the invention.

According to an exemplary embodiment, an ice maker appliance is provided. The ice maker appliance includes a fill tube in fluid communication with a water supply and a mold body comprising two or more mold cavities. The mold body is positioned downstream of the fill tube. The ice maker appliance further includes a controller. The controller is configured for flowing a first volume of liquid into at least one of the mold cavities. The controller is also configured for retaining the first volume of liquid in the at least one of the mold cavities for a first predetermined time after flowing the first volume of liquid into the at least one of the mold cavities. As a result, a first layer of an ice piece forms from the first volume of liquid in the mold cavity. The controller is further configured for flowing a second volume of liquid into the at least one of the mold cavities after the first layer of the ice piece forms. The controller is also configured for retaining the second volume of liquid in the at least one of the mold cavities for a second predetermined time to form a second layer of the ice piece. As a result, the second layer of the ice piece is distinct from the first layer of the ice piece.

According to another exemplary embodiment, a method of operating an ice maker appliance is provided. The ice maker appliance includes a fill tube in fluid communication with a water supply and a mold body comprising two or more mold cavities. The mold body is positioned downstream of the fill tube. The method includes flowing a first volume of liquid into at least one of the mold cavities. The method also includes retaining the first volume of liquid in the at least one of the mold cavities for a first predetermined time after flowing the first volume of liquid into the at least one of the mold cavities. As a result, a first layer of an ice piece forms from the first volume of liquid in the mold cavity. The method further includes flowing a second volume of liquid into the at least one of the mold cavities after the first layer of the ice piece forms. The method also includes retaining the second volume of liquid in the at least one of the mold cavities for a second predetermined time to form a second layer of the ice piece. As a result, the second layer of the ice piece is distinct from the first layer of the ice piece.

These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present invention.

Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

As used herein, terms of approximation, such as “generally,” or “about” include values within ten percent greater or less than the stated value. When used in the context of an angle or direction, such terms include within ten degrees greater or less than the stated angle or direction. For example, “generally vertical” includes directions within ten degrees of vertical in any direction, e.g., clockwise or counterclockwise. As used herein, the terms “first,” “second,” and “third” may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components.

Furthermore, the skilled artisan will recognize the interchangeability of various features from different embodiments. Similarly, the various method steps and features described, as well as other known equivalents for each such methods and feature, can be mixed and matched by one of ordinary skill in this art to construct additional systems and techniques in accordance with principles of this disclosure. Of course, it is to be understood that not necessarily all such objects or advantages described above may be achieved in accordance with any particular embodiment. Thus, for example, those skilled in the art will recognize that the systems and techniques described herein may be embodied or carried out in a manner that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other objects or advantages as may be taught or suggested herein.

provides a perspective view of a refrigerator applianceaccording to an exemplary embodiment of the present subject matter. Refrigerator applianceincludes a cabinet or housingthat extends between a topand a bottomalong a vertical direction V, between a first sideand a second sidealong a lateral direction L, and between a front sideand a rear sidealong a transverse direction T. Each of the vertical direction V, lateral direction L, and transverse direction T are mutually perpendicular to one another.

Housingdefines chilled chambers for receipt of food items for storage. In particular, housingdefines fresh food chamberpositioned at or adjacent a right side (e.g., second side) of housingand a freezer chamberarranged at or adjacent a left side (e.g., first side) of housing. As such, refrigerator applianceis generally referred to as a side-by-side refrigerator. It is recognized, however, that the benefits of the present disclosure apply to other types and styles of refrigerator appliances such as, e.g., a top mount refrigerator appliance, a bottom mount refrigerator appliance, or a single door refrigerator appliance (such as a refrigerator appliance with a single chilled chamber therein, e.g., a standalone freezer or standalone refrigerator appliance, such as a columns unit). Consequently, the description set forth herein is for illustrative purposes only and is not intended to be limiting in any aspect to any particular refrigerator chamber configuration.

Refrigerator dooris rotatably hinged to an edge of housingfor selectively accessing fresh food chamber. In addition, a freezer dooris arranged opposite refrigerator doorfor selectively accessing freezer chamber. Refrigerator doorand freezer doorare shown in the closed configuration in. One skilled in the art will appreciate that other chamber and door configurations are possible and within the scope of the present invention.

Referring still to, a dispensing assemblywill be described according to exemplary embodiments of the present subject matter. Dispensing assemblyis generally configured for dispensing liquid water and/or ice. Although an exemplary dispensing assemblyis illustrated and described herein, it should be appreciated that variations and modifications may be made to dispensing assemblywhile remaining within the present subject matter.

Dispensing assemblyand its various components may be positioned at least in part within a dispenser recessdefined on one of the doors, e.g., freezer door. In this regard, dispenser recessis defined on front sideof refrigerator appliancesuch that a user may operate dispensing assemblywithout opening freezer door. In addition, dispenser recessis positioned at a predetermined elevation convenient for a user to access ice and enabling the user to access ice without the need to bend over. In the exemplary embodiment, dispenser recessis positioned at a level that approximates the chest level of a user.

Dispensing assemblyincludes an ice dispenser including a discharging outlet for discharging ice from dispensing assembly. An actuating mechanism, shown as a paddle, is mounted below discharging outlet for operating an ice or water dispenser. In alternative exemplary embodiments, any suitable actuating mechanism may be used to operate the dispenser. For example, the dispenser may include a sensor (such as an ultrasonic sensor) or a button rather than the paddle. The discharging outlet and the actuating mechanismare an external part of the ice and/or water dispenser and are mounted in dispenser recess.

Returning again to, a control panelis provided for controlling the mode of operation. For example, control panelmay include one or more selector inputs (not shown), such as knobs, buttons, touchscreen interfaces, etc., such as a water dispensing button and an ice-dispensing button, for selecting a desired mode of operation such as crushed or non-crushed ice. In addition, the selector inputs may be used to specify a fill volume or method of operating dispensing assembly. In this regard, the selector inputs may be in communication with a processing device or controller. Signals generated in controlleroperate refrigerator applianceand dispensing assemblyin response to selector inputs. Additionally, a display, such as an indicator light or a screen, may be provided on control panel. The display may be in communication with controller, and may display information in response to signals from controller.

As used herein, “processing device” or “controller” may refer to one or more microprocessors or semiconductor devices and is not restricted necessarily to a single element. The processing device can be programmed to operate refrigerator applianceand dispensing assembly. The processing device may include, or be associated with, one or more memory elements (e.g., non-transitory storage media). In some such embodiments, the memory elements include electrically erasable, programmable read only memory (EEPROM). Generally, the memory elements can store information accessible to the processing device, including instructions that can be executed by processing device. Optionally, the instructions can be software or any set of instructions and/or data that when executed by the processing device, cause the processing device to perform operations. For example, the instructions may include a software package configured to operate the system to, e.g., execute the exemplary methods described below. In exemplary embodiments, the various method steps as disclosed herein may be performed, e.g., in whole or part, by controllerand/or another, separate, dedicated controller.

Turning now to, an inner side of freezer dooris illustrated.illustrates a section through the exemplary refrigerator applianceat the freezer chamber. As may be seen in, an iceboxmay be defined on the inner side of the freezer door. Thus, as shown, e.g., in, the iceboxmay be disposed within the freezer chamberwhen the freezer dooris in the closed position. The iceboxmay house an ice maker, which may be a primary ice maker of the refrigerator appliance and which may be configured to supply ice to dispenser recess. In this regard, for example, iceboxmay define an ice making chamber for housing ice maker (e.g., a first or primary ice maker configured for making water ice or plain ice), a storage mechanism, and a dispensing mechanism.

Refrigerator appliancemay further include a second ice maker(sometimes also referred to as an ice making assembly), such as may be configured for making infused ice, e.g., flavored ice. For example, when the first or primary ice maker configured for making water ice or plain ice is provided, the second ice makerwhich makes infused ice may be a specialty or auxiliary ice maker. As may be seen in, ice making assemblymay be defined on the inner side of the freezer door, such that the ice making assemblymay be disposed within the freezer chamberwhen the freezer dooris in the closed position. The ice makeris generally configured for freezing liquid water mixed with an additive to form the infused ice, e.g., infused ice pieces such as ice cubes. For example, the ice makermay include one or more mold cavities(see, e.g.,) defined therein, such as in a mold bodythereof, and the liquid water and additive may be directed into the mold cavity (or cavities)of the ice maker. The liquid water and additive may be mixed together while flowing to the mold bodyand/or may mix in the mold body, and the mixed liquid may then be retained in the mold body at a temperature at or below the freezing point of water to form an ice piece or ice pieces. Such ice pieces may be harvested from the mold bodyand stored in an ice bin, e.g., below the mold bodysuch that the ice binmay receive the infused ice pieces from the mold bodyby gravity.

As mentioned above, the present disclosure may also be applied to other types and styles of refrigerator appliances such as, e.g., a top mount refrigerator appliance, a bottom mount refrigerator appliance, or may be applied to a standalone ice maker appliance. Variations and modifications may be made to ice making assembly while remaining within the scope of the present subject matter. Accordingly, the description herein of the iceboxand ice makeron the doorof the freezer chamberis by way of example only. In other example embodiments, the ice making assembly or ice makermay be positioned in the fresh food chamber, e.g., of the illustrated side by side refrigerator, of a bottom-mount refrigerator, of a top-mount refrigerator, or any other suitable refrigerator appliance. As another example, the ice making assemblymay also be provided in a standalone ice maker appliance and/or may be the only ice making assembly in the ice maker appliance. As used herein, the term “standalone ice maker appliance” refers to an appliance of which the sole or primary operation is generating or producing ice, e.g., without any additional or other chilled chambers, whereas the more general term “ice maker appliance” includes such appliances as well as appliances with diverse capabilities in addition to making ice, such as a refrigerator appliance equipped with an ice maker, among other possible examples.

In some embodiments, the ice makermay include a dedicated controller, e.g., similar to the controllerof the refrigerator appliancewhich is described above. In embodiments where the ice makeris incorporated into a refrigerator appliance such as the exemplary refrigerator appliancedescribed hereinabove, the dedicated controller may be in addition to the controllerof the refrigerator appliance and may be in communication with the controllerof the refrigerator appliance, and the controller of the ice makermay be in operative communication with other components of the ice makerand may be configured specifically for controlling or directing operation of such components.

Referring now to, an exemplary embodiment of the ice makeris illustrated. In some embodiments, the ice makermay include an additive receiver, which may be a cup, reservoir, or chamber in which an additive may be received, such as directly received, or a pod or other container holding the additive may be received in the additive receiver. A lid or door() may be provided in order to permit access to the additive receiver, e.g., for adding, replacing, or removing additive from the additive receiver. As may be seen in, a dispensing tubemay extend from the additive receiverto provide a flow of additive() from the additive receiverto the mold body, as will be discussed further below. The ice makermay further include a water fill tube, e.g., which is coupled to a water supply to provide plain water(e.g., tap water such as from a municipal water system, well, or other similar source of potable water, such that “plain water” is intended to refer to typical drinking water as is understood by those of ordinary skill in the art). The mold bodymay be downstream of, e.g., below, the additive dispensing tubeand the water fill tube, such that the mold bodyreceives both water and additive in order to form infused ice from both the liquid water and the additive in the mold body.

As may be seen, e.g., in, the mold bodyof the ice makermay include one or more compartmentswhich define mold cavitiesfor receiving liquid therein, such as alternating volumes of distinct liquids to form distinct layers in the resultant ice piece. Each successive volume of liquid, e.g., liquid water alone or liquid water mixed with additive, may be retained within the compartment(s)until ice is formed, e.g., the liquid may be held in the mold cavityand cooled until the liquid freezes before flowing a subsequent volume of liquid into the mold body, thereby forming one or more layered ice pieces, e.g., comprising at least one enhanced or infused layer from water and additive (or the enhanced layer may include only additive) and at least one layer comprising water only.

A dosing pumpmay be connected to the additive receiver, such as the dosing pumpmay be connected to the additive receivervia the dispensing tube, such as the dosing pumpmay be coupled in line with the dispensing tubeor the dosing pumpmay be a peristaltic pump engaged with an outer surface of the dispensing tube(as will be described further below with reference to).

The dispensing tubemay be downstream of the additive receiver, such that a flow of additive from the additive receivermay be urged by the dosing pumpto the mold bodyvia the dispensing tube. For example, the dispensing tubemay extend from an inlet of the dispensing tubecoupled to the additive receiverto an outletof the dispensing tube.

The additive receivermay define an internal volumewhich is sized and configured to hold a volume of liquid additive, such as a volume that is, in proportion to the total volume of the mold cavity (or cavities), sufficient for mixing with a volume of water to form infused ice pieces in the mold cavity. In some embodiments, the liquid additive may be poured directly into the additive receiver. In additional embodiments, the additive receivermay also be sized and configured to hold a vessel, e.g., pod, containing the volume of liquid additive therein as well as or instead of liquid added directly into the additive receiver(e.g., the internal volumemay be sized and configured to alternately receive liquid directly therein for one batch of enhanced ice and to receive a vessel therein for another batch of enhanced ice). Thus, the additive receivermay be configured to hold an additive, such as a liquid additive, for mixing with liquid water as the liquid water flows from a fill tubeof the ice maker. The additive may be provided to and stored in the additive receiverin a liquid state, and may remain in the liquid state at least until the additive mixes with liquid water.

Also illustrated inis a stream of wateremanating from the water fill tube, and, ina stream of additiveemanating from an outletof the dispensing tubeis also illustrated. In some embodiments, a trough or cup, e.g., a fill cup, may be positioned between the fill tubeand the mold body. In such embodiments, the fill cupmay include two or more outlets, and each outletof the two or more outletsmay be positioned and configured to direct a flow of liquid to only one of the two or more mold cavities, and each mold cavityof the two or more mold cavitiesmay be positioned and configured to receive the flow of liquid from only one of the two or more outlets. Thus, the outletsand the mold cavitiesmay be paired in a one-to-one correspondence, e.g., one outletfor each mold cavity, and one mold cavityfor each outlet. For example, in the illustrated embodiments, two mold cavitiesare provided and the fill cupincludes two outlets. Also as may be seen in, each outletmay be in direct fluid communication with the respective mold cavity, such that the liquid (e.g., water and/or additive) flows to each mold cavityfrom each outletwithout flowing through any intervening structures.

Accordingly, the mold body, e.g., the one or more mold cavitiestherein, may be positioned downstream of the dispensing tubeand downstream of the fill tube, such as downstream of the fill cupwhich receives the flow of additivefrom the dispensing tubeand the flow of liquid waterfrom the fill tube.

Referring now toin particular, in some embodiments, the ice makermay be operable for flowing a first volume of liquid into at least one of the mold cavities, e.g., into both of the two mold cavitiesillustrated inat the same time. In such embodiments, the ice makermay be further configured for retaining the first volume of liquid in the at least one of the mold cavities (e.g., both or all of the mold cavities in embodiments which include the fill cupas illustrated inand described above) for a first predetermined time after flowing the first volume of liquid into the at least one of the mold cavities. As a result of retaining the first volume of liquid in the mold cavity or cavities for the first predetermined time, a first layer of an ice piece(see, e.g.,) forms from the first volume of liquid in the mold cavity or cavities. As illustrated in, the first volume of liquid may be water only, such that the first layer of the ice pieceis a water layer(see, e.g.,).

Referring now toin particular, in such embodiments the ice makermay also be configured for flowing a second volume of liquid into the at least one of the mold cavities after the first layer of the ice piece forms, and retaining the second volume of liquid in the at least one of the mold cavities for a second predetermined time to form a second layer of the ice piece. In some embodiments, the second volume of liquid may be a different liquid than the first volume of liquid, e.g., as illustrated in, one of the first volume and the second volume may be water only and the other of the first volume and the second volume may be a mixture of additive and water.

In exemplary embodiments where the first volume and/or second volume of liquid is or includes the mixture of additive and water, e.g., as illustrated in, the stream of additiveand the stream of watermay mix at least partially in the fill cup, forming a mixtureof water and additive. The mixing may be complete in the fill cupalone, or the additive and the water may be only partially mixed in the fill cup, e.g., the mixing of the waterand additivemay continue as the liquid flows into the mold cavity, and the mixturemay only completely form (e.g., mixing of the waterand additivemay be completed) in the mold cavity.

Thus, in such embodiments, the mold cavitymay be configured for receiving the mixtureof liquid water and liquid additive, e.g., from the fill cup. The mold cavitymay be further configured for retaining the mixtureof liquid water and liquid additive to form a second layer of the ice piece from the mixturein the mold cavity. For example, in embodiments such as the exemplary embodiment illustrated in, the second layer may be a mixed layer(see, e.g.,) which is formed from the mixtureof additiveand water.

In some embodiments, the first volume may be the same volume as the second volume, or the second volume and the first volume may differ. In embodiments where the first volume is a different volume than the second volume, the resultant first and second layers of the ice piecewill have different thicknesses or heights. In some embodiments, the first predetermined time may be the same amount of time as the second predetermined time, or the first predetermined time and the second predetermined time may be different lengths of time. For example, varying the length of time for each volume of liquid may also create distinct layers, such as one layer may be clear while another layer may be cloudy. In various embodiments of the present disclosure, the first and second volumes may be different liquids, different volumes, or both. Moreover, any of the foregoing variations may be combined with the first predetermined time and the second predetermined time being approximately the same or being different amounts of time.

Referring now to, in some embodiments, the ice makermay still include the fill cup, but the additive, e.g., the dispensing tubewhich conveys the additive to the mold body, may bypass the fill cup. Such embodiments may provide easier cleaning, in that the fill cupmay not need to be cleaned (or at least not cleaned as frequently) when the additive is not flowed through the fill cup. In such embodiments, the dispensing tubemay include a first outletto provide additive() to a first one of the mold cavitiesand a second outletto provide additive() to a second one of the mold cavities. The first and second outletsandof the dispensing tubemay be in direct fluid communication with each respective mold cavity, such that the liquid additive flows to each mold cavityfrom each outlet,without flowing through any intervening structures. Embodiments such as the exemplary embodiment illustrated inmay be similar to the embodiments ofdescribed above, e.g., may be configured for flowing the various volumes of liquid simultaneously into each (e.g., both) of the mold cavities.

In some embodiments, e.g., as illustrated in, the ice makermay also include an actuatorcoupled to the dispensing tubeand the fill tube. The actuatormay be operable to selectively move the dispensing tube and the fill tube between a first position and a second position. The dispensing tubeand the fill tubemay be positioned for directing a flow of at least one liquid from the dispensing tubeand the fill tube(e.g., at least waterfrom the fill tubeor additivefrom the dispensing tube, or both additivefrom the dispensing tubeand waterfrom the fill tube) to a first mold cavityof the two or more mold cavitiesin the first position. The dispensing tubeand the fill tubemay be positioned for directing a flow of at least one liquid from the dispensing tubeand the fill tubeto a second mold cavityof the two or more mold cavitiesin the second position. For example, the actuatormay be or may include a motor, such as a wax motor. The wax motor, as is generally understood by those of ordinary skill in the art, may include a spring embedded in wax and a heater, where the heater causes the wax to melt when the heater is activated, such that the spring is then freed to move to a second position toward which the spring is biased. The components of the wax motor, being understood by those of ordinary skill in the art, are not specifically illustrated or described in further detail herein for the sake of brevity and clarity.

In embodiments where the actuatoris provided, the first volume of liquid may be provided in a first proportion (e.g., half in embodiments which include two mold cavities, e.g., as illustrated in) to a first one of the mold cavities, as shown in. Turning now to, the actuatormay then move the dispensing tubeand the fill tube(e.g., such motion indicated by arrow M in) to a second position, from which a second proportion of the first volume of liquid may be provided to a second mold cavity. As illustrated in, the dispensing tubeand the fill tubemay be returned to the first position, e.g., when the wax of the wax motor resolidifies after the heater is deactivated in embodiments where the actuatoris provided as a wax motor. After returning to the first position (and after retaining at least the first proportion of the first volume of liquid long enough to freeze), a first proportion of the second volume of liquid may be provided to the first mold cavity, e.g., where the second volume of liquid is the mixtureas illustrated in. Thus, it will be understood that the actuator may again move the dispensing tubeand the fill tubeto the second position in order to provide a second proportion of the second volume of liquid to the second mold cavity(e.g., after the second proportion of the first volume of liquid has been retained in the mold bodylong enough to freeze and thereby complete formation of the first layer of each ice piece in the exemplary two mold cavities). Also, in embodiments where more than two mold cavities are provided, the actuatormay be operable to move the dispensing tubeand the fill tubeto a third position, to provide one or more liquids to a third mold cavity, etc.

Various exemplary ice pieceshaving two or more distinct layers which may be formed using ice makersand/or methods of operating an ice maker according to various embodiments of the present disclosure are illustrated in. As noted above, such layers may be distinct as a result of differences in the liquid provided in the first volume of liquid and the second volume of liquid, differences in the volume of the first volume of liquid and the second volume of liquid, and/or differences in the length of time that each volume of liquid is retained in the mold body. For example, any two of the foregoing may be varied, or all three may be varied, or only one may be varied, in order to form the distinct layers from the two or more volumes of liquid.

The number and size of layers may vary. For example, as may be seen fromgenerally, the two or more distinct layers may include three layers (see, e.g.,), four layers (see, e.g.,), or more than four layers, such as six layers as illustrated in. Also as may be seen throughout, the size, e.g., thickness or height, of the layers may be equal or may differ, or, in embodiments with at least three layers, some layers may be the same size while other layers have a different size.

As illustrated in, the ice piecemay include a water layer(which may also be referred to as a plain layer, and which may be a clear layer or a cloudy later, e.g., based on the predetermined amount of time for which the water was retained in the mold cavity to form the layer), e.g., the first layer may be a water layer. The second layer of the ice piecemay be a mixed layer, e.g., may be formed from a volume liquid that included both additive and water mixed together. Also as shown in, the ice piecemay include a second water layer. For example, the first water layermay be a clear layer, and the second water layermay be a cloudy layer (e.g., due to variations in the freezing time, as noted above). In some embodiments, the pattern of layers may be repeated, e.g., as illustrated in. For example, as illustrated in, the layers may begin with a pattern of clear water layer, mixed water and additive layer, and cloudy water ice layer, with three additional layers in the same order. In additional embodiments, the pattern of layers may vary or be asymmetrical. For example, the first (bottommost) layer may be cloudy water ice layer, followed by an enhanced (i.e., mixed) ice layer, then the clear ice layer, a second mixed layer, a second cloudy layer, and finally a second clear ice layer, among numerous other possible asymmetrical patterns of different layers.

Referring now to, in some embodiments, the dosing pumpmay be a peristaltic pump. For example, a segment of the dispensing tubemay extend through a housingof the peristaltic pump, and the peristaltic pumpmay include a plurality of rollers, each of which compresses a portion of the dispensing tubebetween the rollerand the housing. The peristaltic pumpmay further include a motor(), such as a stepper motor, which is operable to rotate the rollerswithin the housingsuch that the rollersprogressively and sequentially compress portions of the dispensing tube, thereby urging the additive from the additive receiverthrough the dispensing tubeand to the mold body.

Turning now to, embodiments of the present disclosure may also include methods of operating an ice maker appliance, such as the exemplary methodillustrated in. Such methods may be used with any suitable ice maker appliance, for example but not limited to the exemplary refrigerator applianceand/or ice makerdescribed above. Thus, for example, the ice maker appliance may include a fill tube in fluid communication with a water supply and a mold body comprising two or more mold cavities. The mold body may be positioned downstream of the fill tube.

As illustrated in, in some embodiments, methods according to the present disclosure such as methodmay include () flowing a first volume of liquid into at least one of the mold cavities, and () retaining the first volume of liquid in the at least one of the mold cavities for a first predetermined time after flowing the first volume of liquid into the at least one of the mold cavities. As a result of retaining the first volume of liquid, a first layer of an ice piece forms from the first volume of liquid in the mold cavity.

Methodmay also include () flowing a second volume of liquid into the at least one of the mold cavities after the first layer of the ice piece forms. Methodmay further include () retaining the second volume of liquid in the at least one of the mold cavities for a second predetermined time to form a second layer of the ice piece. As a result, the second layer of the ice piece is distinct from the first layer of the ice piece. For example, the second layer of the ice piece may be visually distinct from the first layer of the ice piece, such as the layers may vary in color (e.g., one of the layers may include an additive which provides a distinct color) and/or clarity (e.g., one of the layers may be frozen more slowly to form clearer ice, whereas another layer may be frozen rapidly to form cloudy ice). The second layer may also be distinct from the first layer in taste, e.g., one of the layers may include an additive and the additive may be or may include a flavorant.

For example, in some embodiments, the first volume of liquid may include water only and the second volume of liquid may also include water only. In such embodiments, the second predetermined time may differ from the first predetermined time, and, as a result of such time difference, one of the first layer or the second layer may be a layer of clear ice and the other of the first layer or the second layer may be non-clear ice (e.g., a cloudy layer), thus causing the second layer of the ice piece to be visually distinct from the first layer of the ice piece, e.g., due to the variation in clarity.

In some embodiments, one of the first volume of liquid or the second volume of liquid may include a liquid additive. In some embodiments, the one of the first volume of liquid or the second volume of liquid may include only the liquid additive, e.g., may be a volume of pure additive which, when frozen, forms a layer of the ice piece that is a pure additive layer. In additional embodiments, the volume of liquid that includes the additive may be a mixed liquid, e.g., the one of the first volume of liquid or the second volume of liquid may include liquid water and the liquid additive. Thus, the resultant ice piece may include at least one enhanced layer containing the additive (either additive alone or a mixture of additive and water), and the resultant ice piece may also include at least one plain layer or water ice layer, e.g., the other of the first volume of liquid or the second volume of liquid may include only liquid water.

In some embodiments, () flowing the first volume of liquid into at least one of the mold cavities may include flowing the first volume of liquid simultaneously into each mold cavity of the two or more mold cavities, such as from multiple outlets of a fill cup(see, e.g.,). In such embodiments, () flowing the second volume of liquid into the at least one of the mold cavities after the first layer of ice forms may also include flowing the second volume of liquid simultaneously into each mold cavity of the two or more mold cavities. For example, the ice maker appliance may further include a fill cup between the fill tube and the mold body. The fill cup may include two or more outlets, such that flowing the first volume of liquid simultaneously into each mold cavity of the two or more mold cavities may include flowing at least a portion of the first volume of liquid simultaneously through the two or more outlets of the fill cup into each mold cavity of the two or more mold cavities, and flowing the second volume of liquid simultaneously into each mold cavity of the two or more mold cavities may include flowing at least a portion of the second volume of liquid simultaneously through the two or more outlets of the fill cup into each mold cavity of the two or more mold cavities.

In some embodiments, () flowing the first volume of liquid into at least one of the mold cavities may include flowing a first proportion of the first volume of liquid only into one first mold cavity of the two or more mold cavities. Such embodiments may also include flowing a second proportion of the first volume of liquid only into one second mold cavity of the two or more mold cavities while retaining the first proportion of the first volume of liquid in the one first mold cavity. In such embodiments, flowing the second volume of liquid into the at least one of the mold cavities after the first layer of ice forms may include flowing a first proportion of the second volume of liquid only into the one first mold cavity of the two or more mold cavities.