DISHWASHER AND ROTATING SPRAY ARM THEREOF

Abstract

A dishwasher including a tub at least partially defining a treating chamber with an access opening. A rotating spray arm located within the tub. The rotating spray arm including a body, a fluid distribution manifold formed within the body and having a set of fluid nozzles provided along the body and opening to the treating chamber, and a chemistry distribution manifold separate from the fluid distribution manifold and being formed within the body. The chemistry distribution manifold having a set of chemistry nozzles provided along the body and opening to the treating chamber. The fluid distribution manifold supplies water to the set of fluid nozzles and the chemistry distribution manifold supplies treating chemistry to the set of chemistry nozzles.

Description

CROSS REFERENCE TO RELATED APPLICATION(S)

This application claims the priority of U.S. Provisional Patent Application No. 63/759,837, filed February 18, 2025, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a dishwasher, specifically, to a rotating spray arm of the dishwasher.

BACKGROUND

Contemporary automatic dishwashers for use in a typical household include a tub and at least one rack or basket for supporting soiled dishes within the tub. At least an upper rack and a lower rack for holding dishes to be cleaned are typically provided within the treating chamber. A silverware basket for holding utensils, silverware, etc. is also usually provided and normally removably mounts to the door or within the lower rack.

A spraying system can be provided for recirculating liquid throughout the tub to remove soils from the dishes. The spraying system can include various sprayers, including one or more rotatable sprayers. Various sprayers of the spraying system can be configured to spray toward the racks or silverware basket. One specific type of sprayer that can be included within the spraying system is a rotating spray arm.

BRIEF DESCRIPTION

In one aspect, the disclosure relates to a dishwasher comprising a tub at least partially defining a treating chamber with an access opening, a rotating spray arm located within the tub, the rotating spray arm comprising a body including a first side, a second side, a first end, and a second end, a fluid distribution manifold formed within the body and having a set of fluid nozzles provided along the body and opening to the treating chamber, and a chemistry distribution manifold separate from the fluid distribution manifold and being formed within the body, the chemistry distribution manifold having a set of chemistry nozzles provided along the body and opening to the treating chamber wherein the fluid distribution manifold supplies water to the set of fluid nozzles, and the chemistry distribution manifold supplies treating chemistry to the set of chemistry nozzles.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a schematic right-side perspective view of an exemplary household appliance in the form of an automatic dishwasher having multiple systems for implementing an automatic cycle of operation.

FIG. 2 is a schematic view of the household appliance of FIG. 1 illustrating some exemplary plumbing and electrical connections between at least some of the multiple systems.

FIG. 3 is a schematic view of a controller of the household appliance of FIG. 1.

FIG. 4 is a schematic perspective view of a rotating spray arm suitable for use within the household appliance of FIG. 1, further illustrating a set of fluid nozzles and a set of chemistry nozzles in accordance with various aspects described herein.

FIG. 5 is a schematic top view of the rotating spray arm of FIG. 4, further illustrating a spacing of the set of fluid nozzles and the set of chemistry nozzles in accordance with various aspects described herein.

DETAILED DESCRIPTION

A household appliance, such as a dishwasher, includes a tub defining a treating chamber, and a rotatable spray arm. The rotatable spray arm includes a plurality of nozzles. The plurality of nozzles are configured to emit a water, a chemistry, or combination thereof into the treating chamber. The dishwasher, as described herein, includes the rotatable spray arm including a set of fluid nozzles and a set of chemistry nozzles. The set of fluid nozzles are configured to emit a flow of fluid (e.g., water) into the treating chamber while the set of chemistry nozzles are configured to emit a flow of chemistry (e.g., treating chemistry) into the treating chamber. It will be appreciated that the flow of chemistry emitted from the set of chemistry nozzles can include pure treating chemistry or a mixture of treating chemistry and another fluid (e.g., water).

The use of the rotatable spray arm including the set of fluid nozzles and the set of chemistry nozzles directs one or more cleaning chemistries right to dishes, allowing for more coverage on the dirty dishes. Additionally, since the treating chemistries can be applied directly to the dishes via the set of chemistry nozzles the cycle time can be shortened by cutting down on the dissolving and incorporation time of the chemistry into the water. While described in terms of the household appliance, it will be appreciated that the household appliance has general applicability to other appliances such as, but not limited to, commercial appliances such as those found in factories, restaurants, hotels, retailers, or the like.

Features, advantages, and aspects of the present disclosure are set forth or apparent from a consideration of the following detailed description, drawings, and claims. Moreover, the following detailed description is exemplary and intended to provide explanation without limiting the scope of the disclosure as claimed.

As used herein, the terms “first,” “second,” “third,” “fourth,” or the like can be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. In addition, the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.

Here and throughout the specification and claims, range limitations are combined, and interchanged. Such ranges are identified and include all the sub-ranges contained therein unless context or language indicates otherwise. For example, all ranges disclosed herein are inclusive of the endpoints, and the endpoints are independently combinable with each other.

All directional references (e.g., radial, axial, proximal, distal, upper, lower, upward, downward, left, right, lateral, front, back, top, bottom, above, below, vertical, horizontal, clockwise, counterclockwise, upstream, downstream, forward, aft, etc.) are only used for identification purposes to aid the reader’s understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of aspects of the disclosure described herein. Connection references (e.g., attached, coupled, secured, fastened, connected, and joined) are to be construed broadly and can include intermediate members between a collection of elements and relative movement between elements unless otherwise indicated. As such, connection references do not necessarily infer that two elements are directly connected and in fixed relation to one another. The exemplary drawings are for purposes of illustration only and the dimensions, positions, order, and relative sizes reflected in the drawings attached hereto can vary.

Additionally, as used herein, a “controller” or “controller module” can include a component configured or adapted to provide instruction, control, operation, or any form of communication for operable components to effect the operation thereof. A controller module can include any known processor, microcontroller, or logic device, including, but not limited to: field programmable gate arrays (FPGA), an application specific integrated circuit (ASIC), a proportional controller (P), a proportional integral controller (PI), a proportional derivative controller (PD), a proportional integral derivative controller (PID controller), a hardware-accelerated logic controller (e.g. for encoding, decoding, transcoding, etc.), or the like, or a combination thereof. Non-limiting examples of a controller module can be configured or adapted to run, operate, or otherwise execute program code to effect operational or functional outcomes, including carrying out various methods, functionality, processing tasks, calculations, comparisons, sensing or measuring of values, or the like, to enable or achieve the technical operations or operations described herein. The operation or functional outcomes can be based on one or more inputs, stored data values, sensed or measured values, true or false indications, or the like. While “program code” is described, non-limiting examples of operable or executable instruction sets can include routines, programs, objects, components, data structures, algorithms, etc., that have the technical effect of performing particular tasks or implement particular abstract data types.

FIG. 1 illustrates an exemplary household appliance 1 capable of implementing an automatic cycle of operation for treating articles. The household appliance 1 can include any suitable appliance such as a dishwasher, a steam treatment appliance, a clothes washer, a clothes dryer, a combination washer/dryer, or the like, in non-limiting examples.

In the illustrated example, the household appliance 1 is in the form of a dishwasher 10 for treating dishes. As used in this description, the term “dish(es)” or “dish item(s)” is intended to be generic to any item, single or plural, that can be treated in the dishwasher 10, including, without limitation, dishes, plates, pots, bowls, pans, glassware, or silverware. As illustrated, the dishwasher 10 is a built-in dishwasher implementation, which is designed for mounting under a countertop. However, this description is applicable to other dishwasher implementations such as a stand-alone, drawer-type, or a sink-type, for example.

The dishwasher 10 has a variety of systems, some of which are controllable, to implement the automatic cycle of operation. A chassis 11 is provided to support the variety of systems for implementing the automatic cycle of operation. The chassis 11 includes an interior surface 13 that at least partially defines a treating chamber 16. The treating chamber 16 includes an open face for receiving the dishes 18. As illustrated, for a built-in implementation, the chassis 11 includes a frame in the form of a base 12 and an open-faced tub 14 supported on the base 12. The open-faced tub 14 includes a tub surface 15 at least partially defining the treating chamber 16. The chassis 11 includes a closure in the form of a door assembly 20. The door assembly 20 is pivotally mounted to the base 12 for movement between opened and closed positions to selectively open and close the open face of the treating chamber 16, such as for loading and unloading of dishes or other items. The door assembly 20 includes an inner door surface 21 at least partially defining the treating chamber 16. In this manner, the interior surface 13 can include at least one of the tub surface 15 or the inner door surface 21.

The chassis 11, as in the case of the built-in dishwasher implementation, can be formed by portions of the dishwasher 10, like the tub 14 and the door assembly 20, in addition to a dedicated frame structure, like the base 12, with them all collectively forming a unibody frame to which the variety of systems are supported. In other implementations, such as a drawer-type dishwasher, the chassis can be a tub that is slidable relative to a frame, with the closure being a part of the chassis or the countertop of the surrounding cabinetry. In a sink-type implementation, the sink forms the tub and the cover closing the open top of the sink forms the closure. Sink-type implementations are more commonly found in recreational vehicles.

The systems supported by the chassis 11, while essentially limitless, can include a dish holding system 30, a spray system 40, a recirculation system 50, a drain system 60, a water supply system 70, a drying system 80, a heating system 90, and a filter system 100. These systems are used to implement one or more treating cycles of operation for the dishes, for which there are many, and one of which includes a traditional automatic wash cycle.

A basic automatic wash cycle of operation has a wash phase, where a detergent/water mixture is recirculated and then drained, which is then followed by a rinse phase where water alone or with a rinse agent is recirculated and then drained. An optional drying phase can follow the rinse phase. The automatic wash cycle can have multiple wash phases and multiple rinse phases. The multiple wash phases can include a pre-wash phase where water, with or without detergent, is sprayed or recirculated on the dishes, and can include a dwell or soaking phase. There can be more than one pre-wash phase. A wash phase, where water with detergent is recirculated on the dishes, follows the pre-wash phase(s). There can be more than one wash phase; the number of which can be sensor controlled based on the amount of sensed soils in the wash liquid. One or more rinse phases can follow the wash phase(s), and, in some cases, come between wash phases. The number of wash phases can also be sensor controlled based on the amount of sensed soils in the rinse liquid. The wash phases and rinse phases can include the heating of the water, even to the point of one or more of the phases being hot enough for long enough to sanitize the dishes. A drying phase can follow the rinse phase(s). The drying phase can include a drip dry, heated dry, condensing dry, air dry, or any combination thereof.

A controller 22 can also be included in the dishwasher 10 and operably couples with and controls the various components of the dishwasher 10 to implement the cycle of operation. The controller 22 can be located within the door assembly 20 as illustrated, or it can alternatively be located somewhere within the chassis 11. The controller 22 can also be operably coupled with a control panel or user interface 24 for receiving user-selected inputs and communicating information to the user. The user interface 24 can include operational controls such as dials, lights, switches, and displays enabling a user to input commands, such as a cycle of operation, to the controller 22 and receive information.

The dish holding system 30 can include any suitable structure for holding dishes within the treating chamber 16. Exemplary dish holders are illustrated in the form of an upper dish rack 32 and a lower dish rack 34, referred to as “racks”, which are located within the treating chamber 16. The upper dish rack 32 and the lower dish rack 34 are typically mounted for slidable movement in and out of the treating chamber 16 through the open face for ease of loading and unloading. Drawer guides, which can include slides or rails 36, can be used to slidably mount the upper dish rack 32 to the tub 14. The lower dish rack 34 can have wheels or rollers 38 that roll along rails 39 formed in sidewalls of the tub 14 and onto the door assembly 20 when the door assembly 20 is in the opened position.

Dedicated dish holders can also be provided. One such dedicated dish holder is a third-level rack 33 located above the upper dish rack 32. Like the upper dish rack 32, the third-level rack is slidably mounted to the tub 14 with rails 36. The third-level rack 33 can be used to hold utensils, such as tableware, spoons, knives, spatulas, etc., in an on-the-side or flat orientation. However, the third-level rack 33 is not limited to holding utensils. If an item can fit in the third-level rack 33, it can be washed in the third-level rack 33. The third-level rack 33 generally has a much shorter height or lower profile than the upper and lower dish racks 32, 34. The height of the third-level rack 33 can be short enough that a typical glass cannot stand vertically in the third-level rack 33 within the treating chamber 16.

Another dedicated dish holder can be a silverware basket (not shown), which is typically carried by one of the upper or lower dish racks 32, 34 or mounted to the door assembly 20. Such a silverware basket can hold utensils and the like in an upright orientation as compared to the on-the-side or flat orientation of the third-level rack 33.

A dispenser assembly 48 is provided to dispense treating chemistry (e.g., detergent, anti-spotting agent, etc.) into the treating chamber 16. The dispenser assembly 48 can dispense one or more types of treating chemistries. The dispenser assembly 48 can be a single-use dispenser or a bulk dispenser, or a combination of both.

The dispenser assembly 48 is operably coupled to the interior surface 13 of the treating chamber 16. In the illustrated example, the dispenser assembly 48 is coupled to the inner door surface 21 though this need not be the case. The dispenser assembly 48 can also be coupled to the tub surface 15 in some implementations. It is also contemplated that multiple dispenser assemblies 48 can be provided, including on the inner door surface 21, the tub surface 15, or a combination thereof. It is also further contemplated that the dispenser assembly can be located outside of the dishwasher 10. In the non-limiting example shown, the dispenser assembly 48 can be fluidly coupled to the spray system 40, described further in FIG. 2.

Turning to FIG. 2, the spray system 40 is provided for spraying liquid in the treating chamber 16 and can have a set of spray assemblies or sprayers, some of which can be dedicated to a particular one of the dish holders, to a particular area of a dish holder, to a particular type of cleaning, or to a particular level of cleaning, etc. The set of sprayers can be fixed or movable, such as rotating, relative to the treating chamber 16 or dish holder. As a non-limiting example, the spray system 40 can have an upper spray arm 41, a lower spray arm 42, a third level sprayer 43, a deep-clean sprayer 44, a spot sprayer 45, and a tube sprayer 130. The upper spray arm 41 and lower spray arm 42 are rotating spray arms, located below the upper dish rack 32 and lower dish rack 34, respectively, and rotate about a generally centrally located and vertical axis.

In the non-limiting example shown, the upper and lower spray arm 41, 42 are fluidly coupled to the dispenser assembly 48, however, that need not be the case. Additionally or alternatively, the dispenser assembly 48 is exterior to the dishwasher 10. That is, the dispenser assembly 48 is fluidly separate from, for example, the recirculation system 50. Treating chemistry from the dispenser assembly 48 can be supplied directly to the upper and lower spray arms 41, 42. While the upper spray arm 41 and lower spray arm 42 are illustrated as being supplied by a singular chemistry distribution manifold 49, each of the upper spray arm 41 and the lower spray arm 42 can have a corresponding chemistry distribution manifold. The third level sprayer 43 is located above the third-level rack 33. The third level sprayer 43 is illustrated as being fixed, but could move, such as by rotating. In addition to the third level sprayer 43 or in place of the third level sprayer 43, the tube sprayer 130 can be located at least in part below a portion of the third-level rack 33. The tube sprayer 130 is illustrated as a fixed tube, carried by the third-level rack 33, but could be movable, such as by rotating about a longitudinal axis.

The deep-clean sprayer 44 is a manifold extending along a rear wall of the tub 14 and has multiple nozzles 46, with multiple apertures 47, generating an intensified and/or higher-pressure spray than the upper spray arm 41, the lower spray arm 42, or the third level sprayer 43. The nozzles 46 can be fixed or move, such as by rotating. The spray emitted by the deep-clean sprayer 44 defines a deep clean zone, which, as illustrated, would be disposed along a rear side of the lower dish rack 34. Thus, dishes for deep cleaning, such as dishes with baked-on food, can be located in the lower dish rack 34 to face the deep-clean sprayer 44. The deep-clean sprayer 44, while illustrated as only one unit on a rear wall of the tub 14 could comprise multiple units and/or extend along multiple portions, including different walls, of the tub 14, and can be provide above, below, or beside any of the dish holders where deep-cleaning is desired.

The spot sprayer 45, like the deep-clean sprayer, can emit an intensified and/or higher-pressure spray, especially to a discrete location within one of the dish holders. While the spot sprayer 45 is shown below the lower dish rack 34, it could be adjacent any part of any dish holder or along any wall of the tub 14 where special cleaning is desired. In the illustrated location below the lower dish rack 34, the spot sprayer 45 can be used independently of or in combination with the lower spray arm 42. The spot sprayer 45 can be fixed or can move, such as by rotating.

The upper spray arm 41, the lower spray arm 42, the third level sprayer 43, the deep-clean sprayer 44, the spot sprayer 45, and the tube sprayer 130 are illustrative examples of suitable sprayers and are not meant to be limiting as to the type of suitable sprayers in the set of sprayers 41-45, 130.

The recirculation system 50 recirculates the liquid sprayed into the treating chamber 16 by the sprayers of the spray system 40 back to the sprayers to form a recirculation loop or circuit by which liquid can be repeatedly and/or continuously sprayed onto dishes in the dish holders. The recirculation system 50 can include a sump 51 and a pump assembly 52. The sump 51 collects the liquid sprayed in the treating chamber 16 and can be formed by a sloped or recessed portion of a bottom wall of the tub 14. The pump assembly 52 can include one or more pumps such as a recirculation pump 53. The sump 51 can also be a separate module that is affixed to the bottom wall and include the pump assembly 52.

Multiple liquid supply conduits 54, 55, 56, 57, 58 fluidly couple the set of sprayers 41-45, 130 to the recirculation pump 53. A recirculation valve 59 can selectively fluidly couple each of the conduits 54-58 to the recirculation pump 53. While each sprayer 41-45, 130 is illustrated as having a corresponding dedicated supply conduit 54-58 one or more subsets, comprising multiple sprayers from the total group of sprayers 41-45, 130 can be supplied by the same conduit, negating the need for a dedicated conduit for each sprayer. For example, a single conduit can supply the upper spray arm 41 and the third level sprayer 43. Another example is that the tube sprayer 130 is supplied liquid by the conduit 56, which also supplies the third level sprayer 43.

The recirculation valve 59, while illustrated as a single valve, can be implemented with multiple valves. Additionally, one or more of the conduits 54-58 can be directly coupled to the recirculation pump 53, while one or more of the other conduits 54-58 can be selectively coupled to the recirculation pump 53 with one or more valves. There are essentially an unlimited number of plumbing schemes to connect the recirculation system 50 to the spray system 40. The illustrated plumbing is not limiting.

The drain system 60 drains liquid from the treating chamber 16. The drain system 60 includes a drain pump 62 fluidly coupling the treating chamber 16 to a drain line 64. As illustrated the drain pump 62 fluidly couples the sump 51 to the drain line 64.

While separate recirculation and drain pumps 53, 62 are illustrated, a single pump can be used to perform both the recirculating and the draining functions. Alternatively, the drain pump 62 can be used to recirculate liquid in combination with the recirculation pump 53. When both a recirculation pump 53 and drain pump 62 are used, the drain pump 62 can be more robust than the recirculation pump 53 as the drain pump 62 tends to have to remove solids and soils from the sump 51, unlike the recirculation pump 53, which may recirculate liquid which has solids and soils filtered away to some extent.

The water supply system 70 is provided for supplying fresh water to the dishwasher 10 from a household water supply via a household water valve 71. The water supply system 70 includes a water supply unit 72 having a water supply conduit 73 with a siphon break 74. While the water supply conduit 73 can be directly fluidly coupled to the tub 14 or any other portion of the dishwasher 10, the water supply conduit 73 is shown fluidly coupled to a supply tank 75, which can store the supplied water prior to use. The supply tank 75 is fluidly coupled to the sump 51 by a supply line 76, which can include a controllable valve 77 to control when water is released from the supply tank 75 to the sump 51.

The supply tank 75 can be conveniently sized to store a predetermined volume of water, such as a volume for a phase of the cycle of operation, which is commonly referred to as a “charge” of water. The storing of the water in the supply tank 75 prior to use is beneficial in that the water in the supply tank 75 can be “treated” in some manner, such as softening or heating prior to use.

A water softener 78 is provided with the water supply system 70 to soften the fresh water. The water softener 78 is shown fluidly coupling the water supply conduit 73 to the supply tank 75 so that the supplied water automatically passes through the water softener 78 on the way to the supply tank 75. However, the water softener 78 could directly supply the water to any other part of the dishwasher 10 than the supply tank 75, including directly supplying the tub 14. Alternatively, the water softener 78 can be fluidly coupled downstream of the supply tank 75, such as in-line with the supply line 76. Wherever the water softener 78 is fluidly coupled, it can be done so with controllable valves, such that the use of the water softener 78 is controllable and not mandatory.

The drying system 80 is provided to aid in the drying of the dishes during the drying phase. The drying system as illustrated includes a condensing assembly 81 having a condenser 82 formed of a serpentine conduit 83 with an inlet fluidly coupled to an upper portion of the tub 14 and an outlet fluidly coupled to a lower portion of the tub 14, whereby moisture laden air within the tub 14 is drawn from the upper portion of the tub 14, passed through the serpentine conduit 83, where liquid condenses out of the moisture laden air and is returned to the treating chamber 16 where it ultimately evaporates or is drained via the drain pump 62. The serpentine conduit 83 can be operated in an open loop configuration, where the air is exhausted to atmosphere, a closed loop configuration, where the air is returned to the treating chamber, or a combination of both by operating in one configuration and then the other configuration.

To enhance the rate of condensation, the temperature difference between the exterior of the serpentine conduit 83 and the moisture laden air can be increased by cooling the exterior of the serpentine conduit 83 or the surrounding air. To accomplish this, an optional cooling tank 84 is added to the condensing assembly 81, with the serpentine conduit 83 being located within the cooling tank 84. The cooling tank 84 is fluidly coupled to at least one of the spray system 40, the recirculation system 50, the drain system 60, or the water supply system 70 such that liquid can be supplied to the cooling tank 84. The liquid provided to the cooling tank 84 from any of the systems 40-70 can be selected by source and/or by phase of cycle of operation such that the liquid is at a lower temperature than the moisture laden air or even lower than the ambient air.

As illustrated, the liquid is supplied to the cooling tank 84 by the drain system 60. A valve 85 fluidly connects the drain line 64 to a supply conduit 86 fluidly coupled to the cooling tank 84. A return conduit 87 fluidly connects the cooling tank 84 back to the treating chamber 16 via a return valve 79. In this way, a fluid circuit is formed by the drain pump 62, the drain line 64, the valve 85, the supply conduit 86, the cooling tank 84, the return valve 79, and the return conduit 87 through which liquid can be supplied from the treating chamber 16 to the cooling tank 84, and back to the treating chamber 16. Alternatively, the supply conduit 86 could fluidly couple to the drain line 64 if re-use of the water is not desired.

To supply cold water from the household water supply via the household water valve 71 to the cooling tank 84, the water supply system 70 would first supply cold water to the treating chamber 16, then the drain system 60 would supply the cold water in the treating chamber 16 to the cooling tank 84. It should be noted that the supply tank 75 and cooling tank 84 could be configured such that one tank performs both functions.

The drying system 80 can use ambient air, instead of or in addition to cold water, to cool the exterior of the serpentine conduit 83. In such a configuration, a blower 88 is connected to the cooling tank 84 and can supply ambient air to the interior of the cooling tank 84. The cooling tank 84 can have a vented top 89 to permit the passing through of the ambient air to allow for a steady flow of ambient air blowing over the serpentine conduit 83.

The cooling air from the blower 88 can be used in lieu of the cold water or in combination with the cold water. The cooling air can be used when the cooling tank 84 is not filled with liquid. Advantageously, the use of cooling air or cooling water, or combination of both, can be selected according to the site-specific environmental conditions. If ambient air is cooler than the cold water temperature, then the ambient air can be used. If the cold water is cooler than the ambient air, then the cold water can be used. Energy efficiency and/or cost-effectiveness can also be taken into account when selecting one or both of cooling air or cooling water. The blower 88 can be used to dry the interior of the cooling tank 84 after the water has been drained. Suitable temperature sensors for the cold water and the ambient air can be provided and send their temperature signals to the controller 22, which can determine which of the two is colder at any time or phase of the cycle of operation.

The heating system 90 is provided for heating water used in the cycle of operation. The heating system 90 includes a heater 92, such as an immersion heater, located in the treating chamber 16 at a location where it will be immersed in the water supplied to the treating chamber 16. The heater 92 need not be an immersion heater. The heater 92 can also include an in-line heater located in any of the conduits. There can also be more than one heater 92, including both an immersion heater and an in-line heater.

The heating system 90 can also include a heating circuit 93, which includes a heat exchanger 94, illustrated as a serpentine conduit 95, located within the supply tank 75, with a supply conduit 96 supplying liquid from the treating chamber 16 to the serpentine conduit 95, and a return conduit 97 fluidly coupled to the treating chamber 16. The heating circuit 93 is fluidly coupled to the recirculation pump 53 either directly or via the recirculation valve 59 such that liquid that is heated as part of a cycle of operation can be recirculated through the heat exchanger 94 to transfer the heat to the charge of fresh water residing in the supply tank 75. As various wash phases use liquid that is heated by the heater 92, this heated liquid can then be recirculated through the heating circuit 93 to transfer the heat to the charge of water in the supply tank 75, which can be used in the next phase of the cycle of operation.

A filter system 100 is provided to filter un-dissolved solids from the liquid in the treating chamber 16. The filter system 100 includes a coarse filter 102 and a fine filter 104, which can be a removable basket 106 residing in the sump 51, with the coarse filter 102 being a screen 108 circumscribing the removable basket 106. Additionally, the recirculation system 50 can include a rotating filter in addition to or in place of the either or both of the coarse filter 102 and fine filter 104. Other filter arrangements are contemplated, such as an ultrafiltration system.

As illustrated schematically in FIG. 3, the controller 22 can be coupled with the heater 92 for heating the wash liquid during a cycle of operation, the drain pump 62 for draining liquid from the treating chamber 16 (FIG. 2), and the recirculation pump 53 for recirculating the wash liquid during the cycle of operation. The controller 22 can be provided with a memory 110 and a processor, such as a central processing unit (CPU) 112. The memory 110 can be used for storing control software that can be executed by the CPU 112 in completing a cycle of operation using the dishwasher 10 and any additional software. For example, the memory 110 can store one or more pre-programmed automatic cycles of operation that can be selected by a user and executed by the dishwasher 10. The controller 22 can also receive input from one or more sensors 114. Non-limiting examples of sensors that can be communicably coupled with the controller 22 include, but are not limited to, an ambient air temperature sensor, a treating chamber temperature sensor, a water supply temperature sensor, a door open/close sensor, and a turbidity sensor. A turbidity sensor may determine the soil load associated with a selected grouping of dishes, such as the dishes associated with a particular area of the treating chamber 16. The controller 22 can also communicate with the recirculation valve 59, the household water valve 71, the controllable valve 77, the return valve 79, and/or the valve 85. Optionally, the controller 22 can include or communicate with a wireless communication device 116.

While the non-limiting embodiment shown in FIGS. 1-3 is described and illustrated with various features and components, other embodiments can include subsets of those features and components. For example, some embodiments may not include tanks 75, 84, a water softener 78, and/or a heat exchanger 94, among other features and components.

FIG. 4 illustrates a perspective view of an exemplary rotatable spray arm 140 that can be used within the spray system 40 (FIG. 1). As a non-limiting example, the rotatable spray arm 140 can be utilized as the upper spray arm 41 (FIG. 1) or the lower spray arm 42 (FIG. 1). The rotatable spray arm 140 is configured to emit a liquid within a treating chamber (e.g., the treating chamber 16 of FIG. 1 and FIG. 2). The rotatable spray arm 140 includes a body 142. A fluid distribution manifold 144 and a chemistry distribution manifold 148 are at least partially formed within the body 142. The fluid distribution manifold 144 includes a set of fluid nozzles 146. The set of fluid nozzles 146 are provided along the body 142. The set of fluid nozzles 146 define a set of openings or outlets of the fluid distribution manifold 144. When the rotatable spray arm 140 is provided within a treating chamber (e.g., the treating chamber 16 of FIG. 1), the set of fluid nozzles 146 open into the treating chamber. The fluid distribution manifold 144 is fluidly coupled to any suitable source of fluid 141. As a non-limiting example, the fluid distribution manifold 144 can be fluidly coupled to a recirculation pump (e.g., the recirculation pump 53 of FIG. 1), or a fluid source outside of a dishwasher (e.g., the dishwasher 10 of FIG. 1).

The chemistry distribution manifold 148 includes a set of chemistry nozzles 150. The set of chemistry nozzles 150 are provided along the body 142. The set of chemistry nozzles 150 define a set of openings or outlets of the chemistry distribution manifold 148. When the rotatable spray arm 140 is provided within a treating chamber (e.g., the treating chamber 16 of FIG. 1), the set of chemistry nozzles 150 open into the treating chamber. The chemistry distribution manifold 148 is fluidly coupled to a chemistry dispenser assembly 143 (e.g., the dispenser assembly 48 of FIG. 1). and opening to the treating chamber.

The chemistry distribution manifold 148 is separate from the fluid distribution manifold 144. That is, treating chemistry distributed to the chemistry nozzles 150 via the chemistry distribution manifold 148 is fluidly separate from the fluid distributed to the fluid nozzles 146 via the fluid distribution manifold 144. Fluid dispensed by the fluid distribution manifold 144 is any suitable fluid, for example, water. Treating chemistry dispensed by the chemistry distribution manifold 148 is any suitable treating chemistry, for example, detergent, anti-spotting agent, etc. That is, the fluid dispensed by the fluid distribution manifold 144 is different than the treating chemistry dispensed by the chemistry distribution manifold 148. During operation of the rotatable spray arm 140, the rotatable spray arm 140 is rotatable about a rotational axis (Rax).

FIG. 5 is a top perspective view of the exemplary rotatable spray arm 140 of FIG. 4. The body 142 includes a first end 152 and a second end 154. In the non-limiting example shown, the first end 152 and the second end 154 are rounded ends, however that need not be the case. The body 142 includes a first side 156 and a second side 158 extending between the first end 152 and the second end 154. The body 142 includes a first surface 160 and a second surface 162. In the non-limiting example shown, the second surface 162 can be elevated relative to the first surface 160. That is, the first surface 160 is recessed below the second surface 162. The second surface 162 has a surface length 163 extending parallel to the first side 156.

The first surface 160 includes a pair of opposing segments; a first segment 160a corresponding to the first side 156 and a second segment 160b corresponding to the second side 158. The first segment 160a is provided on an opposing side of the body 142 with respect to the second segment 160b. As a non-limiting example, the first segment 160a and the second segment 160b are located on opposing sides of the second surface 162.

The first surface 160 is angled with respect to the second surface 162. The first surface 160 extends from the second surface 162. The first surface 160 defines a respective portion of a periphery of the body 142. The second surface 162 defines an interior or central portion of the body 142. The first surface 160 at least partially envelopes the second surface 162. The first end 152 and the second end 154 can be formed as continuations of the first surface 160. The first end 152 and the second end 154 connect the first segment 160a and the second segment 160b of the first surface 160. As such, the first surface 160, the first end 152, and the second end 154 can collectively extend envelope the second surface 162.

The set of fluid nozzles 146 can include a first subset of fluid nozzles 146a and a second subset of fluid nozzles 146b. The first subset of fluid nozzles 146a are located along the first segment 160a. The second subset of fluid nozzles 146b are located along the second segment 160b. As a non-limiting example, the first subset of fluid nozzles 146a are arranged equally spaced in a line adjacent to the first side 156. The first subset of fluid nozzles 146a are located on the first surface 160. While eleven fluid nozzles are shown in the first subset of fluid nozzles 146a, any number of fluid nozzles are contemplated. In the non-limiting example shown, each fluid nozzle within the first subset of fluid nozzles 146a are equally spaced by a fluid nozzle distance 164.

The second subset of fluid nozzles 146b are equally spaced along a line adjacent to the second side 158. The second subset of fluid nozzles 146b are located on the first surface 160. While eleven fluid nozzles are shown in the second subset of fluid nozzles 146b, any number of fluid nozzles are contemplated. In the non-limiting example shown, each fluid nozzle within the second subset of fluid nozzles 146b are equally spaced by a fluid nozzle distance 165. It is contemplated that the fluid nozzle distance 164 of the first subset of fluid nozzles 146a can be the same as the fluid nozzle distance 165 of the second subset of fluid nozzles 146b, however, that need not be the case.

Each of the first subset of fluid nozzles 146a and the second subset of fluid nozzles 146b extend a fluid nozzle subset distance 171. Within the fluid nozzle subset distance 171, the respective subset of fluid nozzles do not include a prolonged break or gap of the fluid nozzles of the set of fluid nozzles 146 for a given side of the body 142 that the respective subset of fluid nozzles is located along. As a non-limiting example, the first subset of fluid nozzles 146a extend the fluid nozzle subset distance 171 along a respective portion of the body 142, with each fluid nozzle of the first subset of fluid nozzles 146a being positioned at a regular interval with respect to an adjacent fluid nozzle of the first subset of fluid nozzles 146a. The regular interval in relation to the first subset of fluid nozzles 146a is the fluid nozzle distance 164. The fluid nozzle subset distance 171 can be equal between the first subset of fluid nozzles 146a and the second subset of fluid nozzles 146b. Alternatively, the fluid nozzle subset distance 171 of the first subset of fluid nozzles 146a can be larger or smaller than the fluid nozzle subset distance 171 of the second subset of fluid nozzles 146b.

The set of fluid nozzles 146 can be formed to extend only along the first surface 160. As a non-limiting example, at least one of the first end 152, the second end 154, the second surface 162, or a combination thereof can be formed without the set of fluid nozzles 146. As a non-limiting example, the first end 152 and the second end 154 are formed without the set of fluid nozzles 146. The set of fluid nozzles 146 terminate prior to the first end 152 and the second end 154.

The fluid nozzle subset distance 171 is less than or equal to surface length 163. As a non-limiting example, the fluid nozzle subset distance 171 is greater than or equal to 90% of and less than or equal to 100% of the surface length 163. It is contemplated that it is beneficial to provide form the set of fluid nozzles 146 within the aforementioned range in order to maximize an area of the treating chamber 16 (FIG. 1) that is covered by the set of fluid nozzles 146. Put another way, the fluid nozzle subset distance 171 is used to dictate an area of the treating chamber 16 that will receive a direct flow of fluid from the set of fluid nozzles 146 during use of the rotatable spray arm 140.

The set of chemistry nozzles 150 can include a first subset of chemistry nozzles 150a and a second subset of chemistry nozzles 150b. The first subset of chemistry nozzles 150a are spaced from the second subset of chemistry nozzles 150b. The first subset of chemistry nozzles 150 are adjacent to the first end 152 and located on the second surface 162. The first subset of chemistry nozzles 150a are arranged equally spaced in a line parallel to the first side 156. In the non-limiting example shown, each chemistry nozzle within the first subset of chemistry nozzles 150a are equally spaced by a chemistry nozzle distance 166.

The second subset of chemistry nozzles 150b are adjacent to the second end 154 and located on the second surface 162. The second subset of chemistry nozzles 150b are equally spaced along a line parallel to the second side 158. In the non-limiting example shown, each chemistry nozzle within the second subset of chemistry nozzles 150b are equally spaced by a chemistry nozzle distance 167. It is contemplated that the chemistry nozzle distance 166 of the first subset of fluid nozzles 146a can be the same as the chemistry nozzle distance 167 of the second subset of fluid nozzles 146b, however, that need not be the case.

The set of chemistry nozzles 150 can be arranged such that a gap 169 is formed between the first subset of chemistry nozzles 150a and the second subset of chemistry nozzles 150b. The gap 169 is formed along the second surface 162. The gap 169 is defined as a portion of the second surface 162 with an absence of the set of chemistry nozzles 150. It will be appreciated that the gap 169 can extend greater than or equal to 30% and less than or equal to 75% of the surface length 163. The gap 169 can be provided within a central region of the second surface 162. As used herein, the central region is defined as an area of the body 142 within a close proximity to and including a center of mass of the body 142. Put another way, a central region of the second surface 162 can be formed without the set of chemistry nozzles 150. Put another way, the periphery (e.g., opposing sides) of the second surface 162 can be formed with the set of chemistry nozzles 150.

Each of the first subset of chemistry nozzles 150a and the second subset of chemistry nozzles 150b extend a chemistry nozzle subset distance 173. Within the chemistry nozzle subset distance 173, the respective subset of chemistry nozzles do not include a prolonged break or gap (e.g., the gap 167) of the chemistry nozzles of the set of chemistry nozzles 150 for a given side of the body 142 that the respective subset of chemistry nozzles is located along. As a non-limiting example, the first subset of chemistry nozzles 150a extend the chemistry nozzle subset distance 173 along a respective portion of the body 142, with each fluid nozzle of the first subset of chemistry nozzles 150a being positioned at a regular interval with respect to an adjacent chemistry nozzle of the first subset of chemistry nozzles 150a. The regular interval in relation to the first subset of chemistry nozzles 150a is the chemistry nozzle distance. The chemistry nozzle subset distance 173 can be equal between the first subset of chemistry nozzles 150a and the second subset of chemistry nozzles 150b. Alternatively, the chemistry nozzle subset distance 173 of the first subset of chemistry nozzles 150a can be larger or smaller than the chemistry nozzle subset distance 173 of the second subset of chemistry nozzles 150b.

The set of chemistry nozzles 150 can be formed to extend only along the second surface 162. As a non-limiting example, at least one of the first end 152, the second end 154, the first surface 160, or a combination thereof can be formed without the set of chemistry nozzles 150. As a non-limiting example, the first end 152 and the second end 154 are formed without the set of chemistry nozzles 150. The set of chemistry nozzles 150 terminate prior to the first surface 160, the first end 152, and the second end 154.

The chemistry nozzle subset distance 173 is less than the surface length 163. As a non-limiting example, the chemistry nozzle subset distance 173 is greater than or equal to 10% and less than or equal to 60% of the surface length 163. It is contemplated that it is beneficial to provide form the set of chemistry nozzles 150 within the aforementioned range in order to dictate which area(s) of the treating chamber 16 are covered by the set of chemistry nozzles 150. Put another way, the chemistry nozzle subset distance 173 is used to dictate an area of the treating chamber 16 that will receive a direct flow of treating chemistry from the set of chemistry nozzles 150 during use of the rotatable spray arm 140.

While the set of chemistry nozzles 150 are shown arranged extending across a portion of the surface length 163 of the second surface 162 such that the gap 169 is formed, it is contemplated that the set of chemistry nozzles 150 can be arranged across the entirety of the surface length 163 of the second surface 162. It is also contemplated that the set of chemistry nozzles 150 can have any arrangement on the first surface 160, the second surface 162, or a combination thereof.

The set of fluid nozzles 146 can be open apertures. Open apertures are defined as openings in the body 142 for emitting fluid or treating chemistries. However, it is contemplated that the set of fluid nozzles 146 can be open apertures, nozzles with a nozzle structure, or a combination thereof.

Similarly, the set of chemistry nozzles 150 can include a nozzle structure configured to aid the distribution of treating chemistry. However, it is contemplated that the set of chemistry nozzles 150 can be open apertures, nozzles with a nozzle structure, or a combination thereof.

While the set of chemistry nozzles 150 can be arranged such that the gap 169 is formed, it is contemplated that the set of fluid nozzles 146 can extend at a continuous interval along a respective portion of the body 142. Put another way, the set of fluid nozzles 146 can be spaced a constant distance (e.g., the first fluid nozzle distance 164 and the second fluid nozzles distance 165) along the respective portion of the body 142. For example, the first subset of fluid nozzles 146a and the second subset of fluid nozzles 146b are positioned along opposing portions of the first surface 160 and extend between the first end 152 and the second end 154. Put another way, the set of fluid nozzles 146 can extend at a continuous interval that is equal to or near (e.g., withing 10% of) the surface length 163. The first end 152 and the second end 154 can be formed without either of the set of fluid nozzles 146, the set of chemistry nozzles 150, or a combination thereof. The rotatable spray arm 140 can be symmetric about a first plane that extends along the rotational axis (Rax) and is equidistant between the first side 156 and the second side 158. The first subset of fluid nozzles 146a and the second subset of fluid nozzles 146b can be symmetric about the first plane. Alternatively, the first subset of fluid nozzles 146a and the second subset of fluid nozzles 146b can be non-symmetric about the first plane. The rotatable spray arm 140 can be symmetric about a second plane that extends along the rotational axis (Rax) and is equidistant between the first end 152 and the second end 154. The first subset of chemistry nozzles 150a and the second subset of chemistry nozzles 150b can be symmetric about the first plane. Alternatively, the first subset of chemistry nozzles 150a and the second subset of chemistry nozzles 150b can be non-symmetric about the first plane.

Referring to FIGS. 4-5, during operation, the rotatable spray arm 140 emits a fluid into a dish rack (e.g., the upper and lower dish racks 32, 34 of FIG. 1). The chemistry distribution manifold 148 supplies one or more treating chemistries from the treating chemistry dispenser assembly 143 to the set of chemistry nozzles 150. Dishes and utensils located along the dish rack are sprayed with the one or more treating chemistries from the set of chemistry nozzles 150. The dishes and utensils sprayed with the one or more treating chemistries are cleaned or treated dishes and utensils. Concurrently with or at a different time than the supply of the treating chemistry to the set of chemistry nozzles 150, the fluid distribution manifold 144 supplies water from the source of fluid 141 to the set of fluid nozzles 146. The treated dishes and utensils can be rinsed with water dispensed from the set of fluid nozzles 146. Once rinsed, the dishwasher can commence in a cycle of treating. It will be understood that while in the rotatable spray arm 140 and prior to being sprayed into the treating chamber the one or more treating chemistries and the water are fluidly separate within the rotatable spray arm 140.

It is contemplated that the dishwasher including the rotatable spray arm 140 can include two or more dish racks, with each rack having a dedicated spray arm formed as the rotatable spray arm 140. Put another way, the dishwasher can include a plurality of rotatable spray arms 140 with each rotatable spray arm of the plurality of rotatable spray arms 140 being dedicated to at least one dish rack of the dishwasher. It is contemplated that each rotatable spray arm of the plurality of rotatable spray arms can be independently operable with respect to one another. That is, the set of chemistry nozzles 150 aimed at the upper dish rack can supply a different treating chemistry from the set of chemistry nozzles 150 aimed at the lower dish rack. Having a rotatable spray arm 140 in each of the upper and lower dish racks can allow a user to do zonal specific cleaning cycles. The treating chemistry applied to the upper dish rack can be tailored to the type of dirty dishes located in the upper dish rack. The treating chemistry applied to the lower dish rack can be tailored to the type of dirty dishes located in the lower dish rack. Additionally or alternatively, a cycle of operation can include treating only one dish rack of the upper and lower dish racks. This allows a user to clean smaller loads of dishes while reducing the amount of water and treating chemistry used.

Aspects of the disclosure provide for several benefits, including that routing the dishwasher chemistries directly through the rotatable spray arm allows each cycle to have a custom amount of one or more treating chemistries dispensed. The amount of each of the chemistries can be varied based on the soil/dirt level of the dishes. This can reduce the amount of treating chemistry used on cleaning cycles with less dishes or less dirty dishes. Further, having a set of chemistry nozzles separate from the set of fluid nozzles directs the one or more cleaning chemistries right to the dishes, allowing for more coverage on the dirty dishes. Additionally, since the treating chemistries be applied directly to the dishes via the set of chemistry nozzles the cycle time can be shortened by cutting down on the dissolving and incorporation time of the chemistry into the water.

Including one rotatable spray arm in each of the upper and lower dish racks would also allow the dishwasher to have zonal specific cycles. The user could then choose to run only one rack worth of dishes at a time, enabling smaller load washes for specialty items.

To the extent not already described, the different features and structures of the various embodiments can be used in combination, or in substitution with each other as desired. That one feature is not illustrated in all of the embodiments is not meant to be construed that it cannot be so illustrated, but is done for brevity of description. Thus, the various features of the different embodiments can be mixed and matched as desired to form new embodiments, whether or not the new embodiments are expressly described. All combinations or permutations of features described herein are covered by this disclosure.

This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.

Further non-limiting aspects are provided by the subject matter of the following clauses:

A dishwasher comprising a tub at least partially defining a treating chamber with an access opening, a rotating spray arm located within the tub, the rotating spray arm comprising a body including a first side, a second side, a first end, and a second end, a fluid distribution manifold formed within the body and having a set of fluid nozzles provided along the body and opening to the treating chamber, and a chemistry distribution manifold separate from the fluid distribution manifold and being formed within the body, the chemistry distribution manifold having a set of chemistry nozzles provided along the body and opening to the treating chamber wherein the fluid distribution manifold supplies water to the set of fluid nozzles, and the chemistry distribution manifold supplies treating chemistry to the set of chemistry nozzles.

The dishwasher of any preceding clause, wherein the body includes a first surface and a second surface extending from the first surface, with the first surface being angled with respect to second surface.

The dishwasher of any preceding clause, wherein the set of fluid nozzles are located along the first surface.

The dishwasher of any preceding clause, wherein the first surface includes a first segment and a second segment located on opposing sides of the body, and the first end interconnects the first segment and the second segment.

The dishwasher of any preceding clause, wherein the set of fluid nozzles terminate prior to the first end.

The dishwasher of any preceding clause, wherein the set of fluid nozzles includes a first subset of fluid nozzles located on the first segment, and a second subset of fluid nozzles located on the second segment.

The dishwasher of any preceding clause, wherein the first subset of fluid nozzles and the second subset of fluid nozzles each extend a fluid nozzle subset distance, with the fluid nozzle subset distance of the first subset of fluid nozzles being equal to the fluid nozzle subset distance of the second subset of fluid nozzles.

The dishwasher of any preceding clause, wherein the second surface has a surface length, and the set of fluid nozzles extend a fluid nozzle distance that is greater than or equal to 90% of and less than or equal to 100% of the surface length.

The dishwasher of any preceding clause, wherein the set of chemistry nozzles are located along the second surface.

The dishwasher of any preceding clause, wherein the set of chemistry nozzles include a first subset of chemistry nozzles and a second subset of chemistry nozzles located on opposing sides of the second surface with a gap formed therebetween.

The dishwasher of any preceding clause, wherein the second surface has a surface length, and the gap extends greater than or equal to 30% and less than or equal to 75% of the surface length.

The dishwasher of any preceding clause, wherein the gap is provided within a central region of the body.

The dishwasher of any preceding clause, wherein the first surface defines a periphery of the body, and the second surface defines a central region of the body.

The dishwasher of any preceding clause, wherein rotatable spray arm is rotatable about a rotational axis, and the set of fluid nozzles are symmetric about a plane extending along the rotational axis and being equidistant between the first side and the second side.

The dishwasher of any preceding clause, wherein rotatable spray arm is rotatable about a rotational axis, and the set of chemistry nozzles are symmetric about a plane extending along the rotational axis and being equidistant between the first end and the second end.

The dishwasher of any preceding clause, wherein the body includes a first surface and a second surface extending from the first surface, the set of fluid nozzles are located along the first surface, and the set of chemistry nozzles are located along the second surface.

The dishwasher of any preceding clause, wherein first surface, the first end, and the second end collectively form a periphery of the body.

The dishwasher of any preceding clause, further comprising a dish rack located within the treating chamber.

The dishwasher of any preceding clause, wherein the rotating spray arm is located adjacent to and emits a fluid into the dish rack.

The dishwasher of any preceding clause, wherein the dish rack is a lower rack.

Claims

1. A dishwasher comprising:

a tub at least partially defining a treating chamber with an access opening;

a rotating spray arm located within the tub, the rotating spray arm comprising: a body including a first side, a second side, a first end, and a second end; a fluid distribution manifold formed within the body and having a set of fluid nozzles provided along the body and opening to the treating chamber; and a chemistry distribution manifold separate from the fluid distribution manifold and being formed within the body, the chemistry distribution manifold having a set of chemistry nozzles provided along the body and opening to the treating chamber; wherein the fluid distribution manifold supplies water to the set of fluid nozzles, and the chemistry distribution manifold supplies treating chemistry to the set of chemistry nozzles.

2. The dishwasher of claim 1, wherein the body includes a first surface and a second surface extending from the first surface, with the first surface being angled with respect to second surface.

3. The dishwasher of claim 2, wherein the set of fluid nozzles are located along the first surface.

4. The dishwasher of claim 2, wherein the first surface includes a first segment and a second segment located on opposing sides of the body, and the first end interconnects the first segment and the second segment.

5. The dishwasher of claim 4, wherein the set of fluid nozzles terminate prior to the first end.

6. The dishwasher of claim 4, wherein the set of fluid nozzles includes a first subset of fluid nozzles located on the first segment, and a second subset of fluid nozzles located on the second segment.

7. The dishwasher of claim 6, wherein the first subset of fluid nozzles and the second subset of fluid nozzles each extend a fluid nozzle subset distance, with the fluid nozzle subset distance of the first subset of fluid nozzles being equal to the fluid nozzle subset distance of the second subset of fluid nozzles.

8. The dishwasher of claim 2, wherein the second surface has a surface length, and the set of fluid nozzles extend a fluid nozzle distance that is greater than or equal to 90% of and less than or equal to 100% of the surface length.

9. The dishwasher of claim 2, wherein the set of chemistry nozzles are located along the second surface.

10. The dishwasher of claim 9, wherein the set of chemistry nozzles include a first subset of chemistry nozzles and a second subset of chemistry nozzles located on opposing sides of the second surface with a gap formed therebetween.

11. The dishwasher of claim 10, wherein the second surface has a surface length, and the gap extends greater than or equal to 30% and less than or equal to 75% of the surface length.

12. The dishwasher of claim 10, wherein the gap is provided within a central region of the body.

13. The dishwasher of claim 2, wherein the first surface defines a periphery of the body, and the second surface defines a central region of the body.

14. The dishwasher of claim 1, wherein rotatable spray arm is rotatable about a rotational axis, and the set of fluid nozzles are symmetric about a plane extending along the rotational axis and being equidistant between the first side and the second side.

15. The dishwasher of claim 1, wherein the rotatable spray arm is rotatable about a rotational axis, and the set of chemistry nozzles are symmetric about a plane extending along the rotational axis and being equidistant between the first end and the second end.

16. The dishwasher of claim 1, wherein:

the body includes a first surface and a second surface extending from the first surface;

the set of fluid nozzles are located along the first surface; and

the set of chemistry nozzles are located along the second surface.

17. The dishwasher of claim 16, wherein the first surface, the first end, and the second end collectively form a periphery of the body.

18. The dishwasher of claim 1, further comprising a dish rack located within the treating chamber.

19. The dishwasher of claim 18, wherein the rotating spray arm is located adjacent to and emits a fluid into the dish rack.

20. The dishwasher of claim 19, wherein the dish rack is a lower rack.