Drain assembly and glasswasher incorporating the same

Abstract

A drain assembly comprises a manifold drain comprising a first inlet connectable to a drain tray positioned adjacent a front portion of a glasswasher; a second inlet connectable to a wash tank drain of the glasswasher; a third inlet connectable to a rinse tank drain of the glasswasher; and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 763,530, filed February 26, 2025, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to a drain assembly and a glasswasher incorporating the same.BACKGROUND

[0003] Drain assemblies often struggle with efficient fluid management, leading to potential cross-contamination, clogging, and leaks.BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Embodiments are described in detail below, with reference to the following drawings:

[0005] FIG. 1 is an isometric view of an on-demand glasswasher;

[0006] FIG. 2 is a schematic view showing various components of the on-demand glasswasher of FIG. 1;

[0007] FIG. 3 is a schematic view of a wash system forming part of the on-demand glasswasher of FIG. 1;

[0008] FIG. 4 is a schematic view of a rinse system forming part of the on-demand glasswasher of FIG. 1;

[0009] FIGS. 5 to 10 show views of a drain assembly and the on-demand glasswasher of FIG. 1 incorporating the same;

[0010] FIG. 11 is a top plan view of a motor and conveyor system forming part of the on-demand glasswasher of FIG. 1;

[0011] FIG. 12 is a side view of a sanitary divider forming part of the on-demand glasswasher of FIG. 1;

[0012] FIG. 13 is an isometric view of a cylinder forming part of the on-demand glasswasher of FIG. 1;

[0013] FIG. 14 is a top plan view of the on-demand glasswasher of FIG. 1; and

[0014] FIG. 15 is an exploded view of a tank forming part of the on-demand glasswasher of FIG. 1.

[0015] Like reference numerals are used in the drawings to denote like elements and features.DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

[0016] Accordingly, in one aspect, there is provided a drain assembly that comprises a manifold drain. The manifold drain comprises a first inlet connectable to a drip tray positioned adjacent a front portion of a glasswasher, a second inlet connectable to a wash tank drain of the glasswasher, a third inlet connectable to a rinse tank drain of the glasswasher, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0017] In one or more embodiments, the first inlet is vertically offset from the second inlet and the third inlet.

[0018] In one or more embodiments, the second inlet is vertically offset from the first inlet and the third inlet.

[0019] In one or more embodiments, the third inlet is vertically offset from the first inlet and the second inlet.

[0020] In one or more embodiments, an interior of the manifold drain includes a sleeve that fluidly separates the first inlet from the second inlet.

[0021] In one or more embodiments, the sleeve extends from a top of the manifold drain, past the first inlet, and to a position below the second inlet.

[0022] In one or more embodiments, a top of the manifold drain is closed and positioned opposite the outlet.

[0023] In one or more embodiments, the first inlet connects to the drain tray via a sealed fitting.

[0024] In one or more embodiments, the sealed fitting includes at least one O-ring for leak prevention.

[0025] In one or more embodiments, the sealed fitting includes a locking mechanism that is engaged in response to rotation of the sealed fitting within the first inlet of the manifold drain.

[0026] In one or more embodiments, the drain assembly further comprises the drain tray.

[0027] In one or more embodiments, the drain tray comprises an outlet configured to direct the egress of fluid from the drain tray to the manifold drain.

[0028] In one or more embodiments, the drain tray comprises a sloped bottom surface to facilitate drainage, directing any fluid received therein towards the outlet via gravity.

[0029] Accordingly, in another aspect, there is provided an on-demand glasswasher that comprises a drain tray removably connected to a front portion of a housing and a drain assembly. The drain assembly comprises a manifold drain, which includes a first inlet connected to the drip tray via a sealed connector, a second inlet connected to a wash tank drain, a third inlet connected to the rinse tank drain, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0030] In one or more embodiments the manifold drain comprises a body having a cylindrical wall, and the first, second, and third inlets are circumferentially spaced apart along the cylindrical wall.

[0031] In one or more embodiments, the sealed connector comprises a sealed fitting received in the first inlet of the manifold drain, the sealed fitting including an internal bore dimensioned to receive an outlet of the drain tray in a friction fit.

[0032] In one or more embodiments, the sealed connector further comprises a locking tab that is biased outward and engages a recess in the manifold drain when the sealed fitting is rotated into position.

[0033] In one or more embodiments, the drain tray comprises a drain outlet located at a lowest point of a sloped bottom surface.

[0034] In one or more embodiments, the manifold drain further comprises a sleeve extending from a top of the manifold drain to a location below the second inlet, the sleeve forming an internal partition that directs fluid from the first inlet to the outlet while fluidly isolating the second inlet.

[0035] In one or more embodiments, a control system is configured to activate a drain pump in response to fluid level signals from one or more fluid level sensors in the wash tank and the rinse tank, wherein the drain pump is fluidly connected to the outlet of the manifold drain.

[0036] Other aspects and features of the present application will be understood by those of ordinary skill in the art from a review of the following description of examples in conjunction with the accompanying figures.

[0037] In the present application, the term “and / or” is intended to cover all possible combinations and sub-combinations of the listed elements, including any one of the listed elements alone, any sub-combination, or all of the elements, and without necessarily excluding additional elements.

[0038] In the present application, the phrase “at least one of …and…” is intended to cover any one or more of the listed elements, including any one of the listed elements alone, any sub-combination, or all of the elements, without necessarily excluding any additional elements, and without necessarily requiring all of the elements.

[0039] Turning to FIGS. 1 to 13, an on-demand glasswasher is shown and is generally identified by reference numeral 100. The on-demand glasswasher 100 includes a control system 200 (FIG. 2), a wash system 300 (FIG. 3), a rinse system 400 (FIG. 4), a drain assembly 500 (FIGS. 5 to FIG. 10), a motor and conveyor system 900 (FIG. 11), a sanitary divider 1000 (FIG. 12), a cylinder 1100 (FIG. 13) and a housing 110 that houses the various components therein. The on-demand glasswasher 100 includes a rotary conveyor and is used to wash glasses such as for example glassware, drinkware, barware, wine glasses, etc. as they travel along the rotary conveyor.

[0040] The control system 200 includes at least a microprocessor and a memory device. The memory device is provided to store, amongst other things, instructions that, when executed by the microprocessor, causes the microprocessor to control operation of the on-demand glasswasher 100 and the various components thereof. Example instructions will be described in more detail below.

[0041] The wash system 300 is shown in FIG. 3. The wash system 300 includes a wash tank 305, a heater 310, a bi-metal safety 315, a drain 320, a fluid level sensor assembly 325, a thermistor 330, a detergent dispenser 335, an injector 340, a pump 345, upper wash arms 350, lower wash arms 355, a valve 360 and a screen 365.

[0042] The wash tank 305 receives water from water mains M via the valve 360. Put another way, the valve 360 is connected to the water mains and is used to selectively fill the wash tank 305 with water from the water mains M. The valve 360 may be connected to and controlled by the control system 200.

[0043] The heater 310 is located within the wash tank 305 and is configured to heat water stored in the wash tank 305. The bi-metal safety 315 is connected to the heater 310 and is configured to monitor a temperature of the heater. In the event that the temperature of the heater 310 goes above a threshold temperature, the bi-metal safety 315 is configured to shut-off the heater. The heater 310 and / or the bi-metal safety 315 may be connected to and controlled by the control system 200.

[0044] The drain 320 is located in the bottom of the wash tank 305 and is configured to drain water and / or soap water from the wash tank 305. In one or more embodiments, the drain 320 may be connected to a drain pump 322 that may be used to pump the drain water and / or soap water to drain mains DM. The drain 320 and / or drain pump 322 may be connected to and controlled by the control system 200.

[0045] The fluid level sensor assembly 325 is located within the wash tank 305 and is configured to monitor a level of fluid in the wash tank 305. Specifically, the fluid level sensor assembly 325 emits ultrasonic signals into the wash tank 305. The ultrasonic signals are reflected back to the fluid level sensor assembly 325. The fluid level sensor assembly 325 receives the reflected ultrasonic signals and communicates the reflected ultrasonic signals to the control system 200 where they are processed to determine the level of fluid in the wash tank 305.

[0046] The thermistor 330 is located within the wash tank 305 and is configured to monitor a temperature of the water in the wash tank 305. The thermistor 330 may be connected to and controlled by the control system 200.

[0047] The detergent dispenser 335 provides detergent to the wash tank 305 via the injector 340. The injector 340 may be connected to and controlled by the control system 200.

[0048] Within the wash tank 305, the water contained therein and the detergent are combined to create soap water that may be used to clean one or more objects as they travel along at least a portion of the rotary conveyor. Specifically, the pump 345 is connected to the wash tank 305 and is configured to pump soap water contained in the wash tank 305 to the upper wash arms 350 and the lower wash arms 355.

[0049] The upper wash arms 350 and lower wash arms 355 are positioned to dispense the soap water received from the wash tank 305 via the pump 345. Specifically, the upper wash arms 350 and the lower wash arms 355 are positioned above and below the rotary conveyor (not shown in FIG. 3), respectively. Each one of the wash arms includes at least one nozzle configured to direct the egress of soap water towards the rotary conveyor (not shown). The at least one nozzle may include a plurality of nozzles. In this manner, soap water from the wash tank 305 is used to clean one or more objects as they travel along the rotary conveyor (not shown).

[0050] The screen 365 is positioned between the upper wash arms 350 and the lower wash arms 355 and the wash tank 305. The screen 365 is used to capture or filter debris received from the one or more objects as they are cleaned.

[0051] During operation of the wash system 300, the wash tank 305 is filled with a predefined amount of water via the valve 360 and is filled with a predefined amount of detergent from the detergent dispenser 335 via the injector 340. The water and the detergent are combined within the wash tank 305 to create soap water. The soap water is heated to a predefined temperature using the heater 310.

[0052] As objects travel along a portion of the rotary conveyor, soap water is directed out of the nozzles of the upper wash arms 350 and the lower wash arms 355 and towards the objects. The soap water cleans the objects and excess soap water and any debris from the objects travels through the screen 365 and back into the wash tank 305. In the event that the amount of soap water in the wash tank 305 drops below a certain level, the control system 200 may perform operations to refill or top-up the wash tank 305 with water and detergent. In this manner, the wash system 300 may operate continuously to clean objects as they are placed on the rotary conveyor.

[0053] The rinse system 400 is positioned downstream of the wash system 300. Put another way, as objects travel along the rotary conveyor, they pass through the wash system 300 and then pass through the rinse system 400. In this manner, the objects are rinsed by the rinse system 400 after they are washed by the wash system 300.

[0054] The rinse system 400 is shown in FIG. 4. The rinse system 400 includes a valve 405, a sanitizer dispenser 410, a rinse-aid dispenser 415, an injector 420, an injection fitting 425, upper rinse arms 430, lower rinse arms 435 and a drain 440.

[0055] The rinse system 400 receives water from the water mains M via the valve 405. It will be appreciated that the water received from the water mains M may be cold water, that is, the water is not heated. The water travels to the injection fitting 425. The valve 405 may be connected to and controlled by the control system 200.

[0056] The sanitizer dispenser 410 provides sanitizer to the injection fitting 425 via the injector 420 and similarly the rinse-aid dispenser 415 provides rinse-aid to the injection fitting 425 via the injector 420. The injector 420 may be connected to and controlled by the control system 200. The injector 420 may be the same injector as the injector 340 of the wash system 300.

[0057] The injection fitting 425 receives the water from the water mains via the valve 405, the sanitizer from the sanitizer dispenser 410 via the injector 420, and rinse-aid from the rinse-aid dispenser 415 via the injector 420 and provides the mixture to the upper rinse arms 430 and the lower rinse arms 435.

[0058] The upper rinse arms 430 and the lower rinse arms 435 are positioned to dispense the mixture received from the injection fitting 425. Specifically, the upper rinse arms 430 and the lower rinse arms 435 are positioned above and below the rotary conveyor (not shown), respectively. Each one of the rinse arms includes at least one nozzle that is configured to direct the egress of the mixture towards the rotary conveyor (not shown). The at least one nozzle may include a plurality of nozzles. In this manner, the mixture of water, sanitizer and rinse-aid is used to rinse one or more objects as they travel along the rotary conveyor (not shown).

[0059] The drain 440 is located below the upper rinse arms 430 and the lower rinse arms 435. The drain 440 is configured to drain the mixture from the rinse system 400. The drain 440 may be connected to drain mains and as such the mixture received by the drain 440 may be drained out through the drain mains. Similar to the drain 320, the drain 440 may be connected to a drain pump which may be used to pump the mixture to the drain mains. The drain 440 and / or the drain pump may be connected to and controlled by the control system 200. A screen may be provided to capture or filter debris received from the one or more objects as they are rinsed and the screen may be positioned between the upper rinse arms 430 and the lower rinse arms 435 and the drain 440.

[0060] During operation of the rinse system 400, the injection fitting 425 receives the water from the water mains via the valve 405, the sanitizer from the sanitizer dispenser 410 via the injector 420, and rinse-aid from the rinse-aid dispenser 415 via the injector 420 and provides the mixture to the upper rinse arms 430 and the lower rinse arms 435.

[0061] After being washed by the wash system 300, objects travel along a portion of the rotary conveyor towards the rinse system 400. As the objects travel through the rinse system 400, the mixture is directed out of the nozzles of the upper rinse arms 430 and the lower rinse arms 435 towards the objects. The mixture rinses the objects and excess mixture travels down through the drain 440.

[0062] The upper wash arms 350 and the upper rinse arms 430 are connected to a housing of an upper spray arm assembly and the lower wash arms 355 and the lower rinse arms 435 are connected to a housing of a lower spray arm assembly.

[0063] The housing of the upper spray arm assembly and the housing of the lower arm spray assembly define at least one locating port that includes an opening. A spring-loaded connector that has a body complementary in shape to the locating port is used to connect the upper wash arms and upper rinse arms (or lower wash arms and lower rinse arms) to the housing.

[0064] In one or more embodiments, the spring-loaded connector includes a body and a yoke pivotally connected to the body via a torsion spring. The housing may include a feature that exerts a force on the yoke during insertion of the spring-loaded connector into the locating port and causes the yoke to pivot with respect to the body during the insertion. Prior to insertion, the torsion spring is in an unloaded position, during insertion, the torsion spring moves to a loaded position, and once connected to the housing the torsion spring moves back to the unloaded position.

[0065] The spring-loaded connector connects to at least one spray arm. In one or more embodiments, the spring-loaded connector connects to two spray arms such that the two spray arms extend out from the spring-loaded connector in a V-shape formation. It will be appreciated that the two spray arms may include two wash arms or two rinse arms.

[0066] The drain assembly 500 is shown in FIGS. 5 to 10. The drain assembly 500 includes a manifold drain 510, a drain tray 520, and a sealed fitting 530.

[0067] The manifold drain 510 is configured to receive and drain fluid from multiple sources. Specifically, the manifold drain 510 comprises a first inlet 512, a second inlet 514, and a third inlet 516, each configured to be connected via a sealed fitting or fluid conduit to a corresponding fluid source. The first inlet 512 is connected to and receives fluid from the drain tray 520, the second inlet 514 is connected to and receives fluid from the wash tank drain (such as the drain 320 described herein), and the third inlet 516 is connected to and receives fluid from the rinse tank drain (such as the drain 440 described herein). The manifold drain 510 includes an outlet 518 that is fluidly connected to the first inlet 512, the second inlet 514, and the third inlet 516 allowing for the drainage of fluids from each source.

[0068] In one or more embodiments, the manifold drain 510 comprises a body having a cylindrical wall. The first inlet 512, second inlet 514, and third inlet 516 are formed through the cylindrical wall and are circumferentially spaced apart from one another. The circumferential arrangement of the inlets facilitates organized routing of fluid sources into the manifold drain and improves overall fluid handling efficiency.

[0069] In one or more embodiments, the first inlet 512 is vertically offset from the second inlet 514 and the third inlet 516. The second inlet 514 is vertically offset from the first inlet 512 and the third inlet 516. The third inlet 516 is vertically offset from the first inlet 512 and the second inlet 514. These vertical offsets allow for increased fluid flow, reducing the risk of cross-contamination or clogging.

[0070] In one or more embodiments, the interior of the manifold drain 510 includes a sleeve 513 that fluidly separates the first inlet 512 from the second inlet 514. The sleeve 513 extends from the top of the manifold drain 510, past the first inlet 512, and continues to a position below the second inlet 514. The sleeve 513 ensures fluid isolation between the first inlet 512 and the second inlet 514, improving overall performance and preventing potential leakage or mixing of fluids. The sleeve 513 forms a dedicated fluid channel between the first inlet 512 and the outlet 518, and by extending below the second inlet 514, prevents turbulent fluid from the second source from mixing with fluid entering through the first inlet. In addition to serving as a passive fluid isolator, the sleeve 513 further provides anti-siphon functionality that maintains fluid levels within the wash tank and inhibits backflow from the drain pump into the wash water. The sleeve 513 thus acts as a passive fluid isolator. It will be appreciated that the top of the manifold drain 510 is closed, ensuring that fluid exits only through the designated outlet 518.

[0071] The sleeve 513 thus forms an internal partition within the manifold drain 510 that separates flow paths from different inlets. By directing each flow path to the outlet 518 while resisting siphoning or reversing pump effects, the sleeve 513 enhances both isolation and backflow prevention. This partitioning helps ensure fluid from the first inlet 512 is directed to the outlet 518 without interacting with fluid entering via the second inlet 514.

[0072] The drain tray 520 connects to the housing 110 of the on-demand glasswasher 100. Specifically, the drain tray 520 connects to the housing 110 at a position adjacent to a front portion of the glasswasher 100. The drain tray 520 may receive fluids dumped out of glasses to be washed by the glasswasher 100 and / or other fluids such as fluids splashed out of the on-demand glasswasher 100.

[0073] The drain tray 520 is connected to the first inlet 512 of the manifold drain 510 via the sealed fitting 530. In one or more embodiments, the drain tray 520 may include an outlet 522 that extends from a bottom surface thereof. The outlet 522 may be dimensioned to be received by the sealed fitting 530 and retained therein, such as by friction or an interference fit. At least one O-ring may be used to create a seal between the outlet 522 and the sealed fitting 530.

[0074] In one or more embodiments, the sealed fitting 530 includes an internal bore that is dimensioned to receive the outlet 522 of the drain tray 520 in a friction fit or interference fit. This connection provides a leak-resistant, mechanically stable interface between the drain tray 520 and the manifold drain 510.

[0075] In one or more embodiments, the bottom surface of the drain tray 520 includes a sloped surface to facilitate drainage and direct any fluid received therein towards the outlet 522 via gravity. The outlet 522 is positioned at the lowest point of the sloped surface to promote drainage.

[0076] The drain tray 520 prevents ambient fluid or accidental spills from entering the interior of the housing 110 and routes such fluids directly to the manifold drain 510 via the sealed fitting 530. This structure minimizes contamination risk and simplifies cleaning operations, particularly in high-volume or sanitary-sensitive environments such as for example bars or commercial kitchens.

[0077] The sealed fitting 530 securely connects the drain tray 520 to the manifold drain 510, ensuring leak-free operation. In some embodiments, the sealed fitting 530 includes at least one O-ring to prevent leaks and maintain a fluid-tight seal between the drain tray 520 and the manifold drain 510.

[0078] Additionally, the sealed fitting 530 may incorporate a locking mechanism that engages through a rotational motion, enhancing the reliability of the connection. As shown in FIG. 8, the sealed fitting 530 is inserted into the first inlet 512 at an angle and pushed inward. Once properly positioned within the first inlet 512, it is rotated to a vertical position, locking it in place. After installation, the outlet 522 of the drain tray 520 can be inserted into the sealed fitting 530 (see FIG. 9). The locking mechanism not only ensures a secure connection but also simplifies maintenance and installation.

[0079] In some embodiments, the locking mechanism of the sealed fitting 530 includes a locking tab that is biased outward. The locking tab is configured to engage with a corresponding recess formed in the manifold drain 510 when the sealed fitting 530 is rotated into its final position. This engagement secures the fitting in place and ensures a reliable mechanical and fluid connection.

[0080] Overall, the drain assembly 500 provides an efficient and reliable solution for managing drainage from multiple fluid sources in the on-demand glasswasher 100. The vertical offsets of the inlets, the interior sleeve, and the sealed fitting all contribute to the operation of the drain assembly 500. These features ensure proper fluid flow, prevent leaks, and minimize the risk of fluid mixing.

[0081] By integrating vertically offset inlets and an internal sleeve within the manifold drain, the drain assembly operates more efficiency by reducing the likelihood of backflow and cross-contamination. As mentioned, the sleeve 513 not only promotes unidirectional flow using gravitational advantage and internal channeling but also provides an anti-siphon function that maintains proper fluid levels within the wash tank and resists reverse flow caused by the drain pump. These integrated functions promote unidirectional flow using gravitational advantage and internal channeling while preventing water from the drain pump from being forced back into the wash water. These features improve the overall fluid management performance of the system without the need for additional pumps or valves.

[0082] In one or more embodiments, the drain assembly 500 is operatively integrated with the control system 200 such that drainage events are selectively initiated or regulated based on system conditions sensed or computed by the control system 200. For example, the control system 200 may receive inputs from fluid level sensors and / or thermistors in the wash tank and / or the rinse tank, and based on predefined threshold, may generate control signals to activate drain pumps connected to the manifold drain 510. The geometry of the manifold drain 510, including the vertically offset inlets, internal sleeve 513, and sealed fitting 530, enables the control system to efficiently manage multiple fluid sources without requiring a complex array of valves or flow switches. This architecture reduces system complexity and response latency while improving overall fluid evacuation efficiency. The control logic of the control system is simplified as it requires simplified binary pump control routines rather than the need to manage dynamically variable flow paths, thereby reducing processing cycles and memory usage. In this manner, the structural configuration of the drain assembly 500 contributes to a more efficient and deterministic software control model, improving the performance of the on-demand glasswasher system 100 as a whole.

[0083] In one or more embodiments, the drain pump is fluidly connected to inlet 514 of the manifold drain 510, and is controlled by the control system 200 in response to system conditions such as fluid level sensor signals. The outlet 518 of the manifold drain 510 then directs fluid to the building drain.

[0084] As shown in FIG. 11, the motor and conveyor system 900 includes a rotary conveyor 910 that is driven by a motor positioned therebelow. In this embodiment, the motor is a drive motor that is connected to the rotary conveyor 910 via a drive shaft and conveyor drive gear such that rotation of the motor causes rotation of the rotary conveyor 910. The motor is connected to and controlled by the control system 200.

[0085] In this embodiment, the rotary conveyor 910 comprises a plurality of concentric ribs 915 and a plurality of radially extending vanes 920. The radially extending vanes 920 are connected to the concentric ribs 915. The conveyor drive gear includes guides or teeth that are angled to receive the rotary conveyor 910 and ensure it is held in the correct position. Put another way, the conveyor drive gear includes guides or teeth that define slots that are complementary in shape with the vanes 920 and / or the ribs 915 and are used to connect the rotary conveyor 910 to the drive shaft and to ensure that the rotary conveyor 910 is held in the correct position.

[0086] The motor and conveyor system 900 may additionally include one or more components that may be used to control the operation thereof. For example, the motor and conveyor system 900 may include a sensor such as a proximity sensor that may be used to detect the presence of one or more objects on the rotary conveyor 910 which in turn may be used to control the operation of the on-demand glasswasher 100. For example, the sensor may communicate with the control system 200 to selectively start the motor when no object is detected in proximity of the sensor and may selectively stop the motor when an object is detected in proximity of the sensor.

[0087] The sanitary divider 1000 is shown in FIG. 12. In this embodiment, the sanitary divider 1000 includes a panel 1010 that is made of a rigid material such as for example plastic and the rigid material may be transparent. The panel 1010 is generally rectangular and includes a tapered section 1015 at a top side thereof. The tapered section 1015 extends downward from the top surface to a side of the panel 1010. The sanitary divider 1000 includes a bracket 1020 that is dimensioned to receive and retain the panel 1010. Specifically, the bracket 1020 includes parallel spaced apart sections that define an opening to receive and retain a portion of the panel 1010. Fasteners such as screws may be used to secure the panel 1010 in the bracket 1020. The bracket 1020 includes a hook 1025 that is dimensioned to connect to a portion of the housing 110.

[0088] In one or more embodiments, the sanitary divider 1000 divides or separates a load zone and a clean zone of the on-demand glasswasher 100 and this may ensure any dirt or debris from dirty or unwashed glasses does not contact or soil clean glasses located in the clean zone.

[0089] The cylinder 1100 is shown in FIG. 13. The cylinder 1100 may be made of a material such as for example stainless steel. The cylinder 1100 is dimensioned to be circumscribed by the rotary conveyor 910. Specifically, the cylinder 1100 is dimensioned to be positioned within the center of the rotary conveyor 910 such that at least a portion of the cylinder 1100 extends above the rotary conveyor 910 while still allowing the rotary conveyor 910 to rotate. The rounded surface of the cylinder 1100 prevents or otherwise minimizes the risk of glasses falling over or being scratched should they come into contact therewith.

[0090] Assembly of various components of the on-demand glasswasher 100 will now be described with respect to FIG. 14 which is a top plan view of the on-demand glasswasher 100. It will be appreciated that the on-demand glasswasher 100 is shown without a top covering for illustrative purposes only in FIG. 14.

[0091] The motor and conveyor system 900 are positioned within the housing 110. The lower wash arms 355 and the lower rinse arms 435 are located directly beneath the upper wash arms 350 and the upper rinse arms 430, respectively.

[0092] As mentioned, the motor and conveyor system 900 may additionally include one or more components that may be used to control the operation thereof. In the example shown in FIG. 14, the motor and conveyor system 900 includes a sensor 1300 that is positioned within the housing 110 of the on-demand glasswasher 100.

[0093] The hook 1025 of the sanitary divider 1000 connects to a portion of the housing 110. In the example shown in FIG. 14, the sanitary divider 1000 is positioned adjacent to the sensor 1300 of the motor and conveyor system 900 and such that the panel 1010 extends into the housing 110.

[0094] The cylinder 1100 is positioned within the center of the rotary conveyor 910 such that at least a portion of the cylinder 1100 extends above the rotary conveyor 910 while still allowing the rotary conveyor 910 to rotate.

[0095] The on-demand glasswasher 100 includes four zones. A load zone is defined at a first end of the housing 110. The load zone may be defined on a particular side of the sanitary divider 1000. Specifically, the load zone may be defined such that any objects placed on the rotary conveyor 910 travel in a direction away from the sanitary divider 1000. During use, a user places objects to be cleaned onto the rotary conveyor 910 at a location that corresponds to the load zone.

[0096] A wash zone is defined intermediate the upper wash arms 350. The wash zone is downstream of the load zone. As objects travel along the rotary conveyor (in the direction indicated by arrow A in FIG. 14) into the wash zone, the objects are washed by the wash system 300 in manners described herein.

[0097] A rinse zone is defined intermediate the upper rinse arms 430. The rinse zone is downstream of the wash zone. As objects travel along the rotary conveyor (in the direction indicated by arrow A in FIG. 14) into the rinse zone, the objects are rinsed by the rinse system 400 in manners described herein.

[0098] A clean zone is defined at the front end of the housing 110. The clean zone is downstream of the rinse zone. The clean zone may be defined on a second side of the sanitary divider 1000. In this manner, the sanitary divider 1000 divides or separates the load zone and the clean zone and this may ensure any dirt or debris from dirty or unwashed glasses does not contact or soil clean glasses located in the clean zone. During use, once objects have been washed and rinsed, they remain in the clean zone until the user removes them from the rotary conveyor.

[0099] FIG. 15 is an exploded view of a tank of the on-demand glasswasher described herein. The tank generally has an upper portion 1510, a lower portion 1520, and a sump wash tank 1530. The tank includes an integrated tank and wash chamber. The wash tank 305 may be of the same type as the tank shown in FIG. 15.

[0100] As noted, certain adaptations and modifications of the described embodiments can be made. Therefore, the above discussed embodiments are considered to be illustrative and not restrictive.

Examples

Embodiment Construction

[0016]Accordingly, in one aspect, there is provided a drain assembly that comprises a manifold drain. The manifold drain comprises a first inlet connectable to a drip tray positioned adjacent a front portion of a glasswasher, a second inlet connectable to a wash tank drain of the glasswasher, a third inlet connectable to a rinse tank drain of the glasswasher, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0017]In one or more embodiments, the first inlet is vertically offset from the second inlet and the third inlet.

[0018]In one or more embodiments, the second inlet is vertically offset from the first inlet and the third inlet.

[0019]In one or more embodiments, the third inlet is vertically offset from the first inlet and the second inlet.

[0020]In one or more embodiments, an interior of the manifold drain includes a sleeve that fluidly separates the first inlet from the second inlet.

[0021]In one or more embodiments, the sleeve extends from a...

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 763,530, filed February 26, 2025, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to a drain assembly and a glasswasher incorporating the same.BACKGROUND

[0003] Drain assemblies often struggle with efficient fluid management, leading to potential cross-contamination, clogging, and leaks.BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Embodiments are described in detail below, with reference to the following drawings:

[0005] FIG. 1 is an isometric view of an on-demand glasswasher;

[0006] FIG. 2 is a schematic view showing various components of the on-demand glasswasher of FIG. 1;

[0007] FIG. 3 is a schematic view of a wash system forming part of the on-demand glasswasher of FIG. 1;

[0008] FIG. 4 is a schematic view of a rinse system forming part of the on-demand glasswasher of FIG. 1;

[0009] FIGS. 5 to 10 show views of a drain assembly and the on-demand glasswasher of FIG. 1 incorporating the same;

[0010] FIG. 11 is a top plan view of a motor and conveyor system forming part of the on-demand glasswasher of FIG. 1;

[0011] FIG. 12 is a side view of a sanitary divider forming part of the on-demand glasswasher of FIG. 1;

[0012] FIG. 13 is an isometric view of a cylinder forming part of the on-demand glasswasher of FIG. 1;

[0013] FIG. 14 is a top plan view of the on-demand glasswasher of FIG. 1; and

[0014] FIG. 15 is an exploded view of a tank forming part of the on-demand glasswasher of FIG. 1.

[0015] Like reference numerals are used in the drawings to denote like elements and features.DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

[0016] Accordingly, in one aspect, there is provided a drain assembly that comprises a manifold drain. The manifold drain comprises a first inlet connectable to a drip tray positioned adjacent a front portion of a glasswasher, a second inlet connectable to a wash tank drain of the glasswasher, a third inlet connectable to a rinse tank drain of the glasswasher, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0017] In one or more embodiments, the first inlet is vertically offset from the second inlet and the third inlet.

[0018] In one or more embodiments, the second inlet is vertically offset from the first inlet and the third inlet.

[0019] In one or more embodiments, the third inlet is vertically offset from the first inlet and the second inlet.

[0020] In one or more embodiments, an interior of the manifold drain includes a sleeve that fluidly separates the first inlet from the second inlet.

[0021] In one or more embodiments, the sleeve extends from a top of the manifold drain, past the first inlet, and to a position below the second inlet.

[0022] In one or more embodiments, a top of the manifold drain is closed and positioned opposite the outlet.

[0023] In one or more embodiments, the first inlet connects to the drain tray via a sealed fitting.

[0024] In one or more embodiments, the sealed fitting includes at least one O-ring for leak prevention.

[0025] In one or more embodiments, the sealed fitting includes a locking mechanism that is engaged in response to rotation of the sealed fitting within the first inlet of the manifold drain.

[0026] In one or more embodiments, the drain assembly further comprises the drain tray.

[0027] In one or more embodiments, the drain tray comprises an outlet configured to direct the egress of fluid from the drain tray to the manifold drain.

[0028] In one or more embodiments, the drain tray comprises a sloped bottom surface to facilitate drainage, directing any fluid received therein towards the outlet via gravity.

[0029] Accordingly, in another aspect, there is provided an on-demand glasswasher that comprises a drain tray removably connected to a front portion of a housing and a drain assembly. The drain assembly comprises a manifold drain, which includes a first inlet connected to the drip tray via a sealed connector, a second inlet connected to a wash tank drain, a third inlet connected to the rinse tank drain, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0030] In one or more embodiments the manifold drain comprises a body having a cylindrical wall, and the first, second, and third inlets are circumferentially spaced apart along the cylindrical wall.

[0031] In one or more embodiments, the sealed connector comprises a sealed fitting received in the first inlet of the manifold drain, the sealed fitting including an internal bore dimensioned to receive an outlet of the drain tray in a friction fit.

[0032] In one or more embodiments, the sealed connector further comprises a locking tab that is biased outward and engages a recess in the manifold drain when the sealed fitting is rotated into position.

[0033] In one or more embodiments, the drain tray comprises a drain outlet located at a lowest point of a sloped bottom surface.

[0034] In one or more embodiments, the manifold drain further comprises a sleeve extending from a top of the manifold drain to a location below the second inlet, the sleeve forming an internal partition that directs fluid from the first inlet to the outlet while fluidly isolating the second inlet.

[0035] In one or more embodiments, a control system is configured to activate a drain pump in response to fluid level signals from one or more fluid level sensors in the wash tank and the rinse tank, wherein the drain pump is fluidly connected to the outlet of the manifold drain.

[0036] Other aspects and features of the present application will be understood by those of ordinary skill in the art from a review of the following description of examples in conjunction with the accompanying figures.

[0037] In the present application, the term “and / or” is intended to cover all possible combinations and sub-combinations of the listed elements, including any one of the listed elements alone, any sub-combination, or all of the elements, and without necessarily excluding additional elements.

[0038] In the present application, the phrase “at least one of …and…” is intended to cover any one or more of the listed elements, including any one of the listed elements alone, any sub-combination, or all of the elements, without necessarily excluding any additional elements, and without necessarily requiring all of the elements.

[0039] Turning to FIGS. 1 to 13, an on-demand glasswasher is shown and is generally identified by reference numeral 100. The on-demand glasswasher 100 includes a control system 200 (FIG. 2), a wash system 300 (FIG. 3), a rinse system 400 (FIG. 4), a drain assembly 500 (FIGS. 5 to FIG. 10), a motor and conveyor system 900 (FIG. 11), a sanitary divider 1000 (FIG. 12), a cylinder 1100 (FIG. 13) and a housing 110 that houses the various components therein. The on-demand glasswasher 100 includes a rotary conveyor and is used to wash glasses such as for example glassware, drinkware, barware, wine glasses, etc. as they travel along the rotary conveyor.

[0040] The control system 200 includes at least a microprocessor and a memory device. The memory device is provided to store, amongst other things, instructions that, when executed by the microprocessor, causes the microprocessor to control operation of the on-demand glasswasher 100 and the various components thereof. Example instructions will be described in more detail below.

[0041] The wash system 300 is shown in FIG. 3. The wash system 300 includes a wash tank 305, a heater 310, a bi-metal safety 315, a drain 320, a fluid level sensor assembly 325, a thermistor 330, a detergent dispenser 335, an injector 340, a pump 345, upper wash arms 350, lower wash arms 355, a valve 360 and a screen 365.

[0042] The wash tank 305 receives water from water mains M via the valve 360. Put another way, the valve 360 is connected to the water mains and is used to selectively fill the wash tank 305 with water from the water mains M. The valve 360 may be connected to and controlled by the control system 200.

[0043] The heater 310 is located within the wash tank 305 and is configured to heat water stored in the wash tank 305. The bi-metal safety 315 is connected to the heater 310 and is configured to monitor a temperature of the heater. In the event that the temperature of the heater 310 goes above a threshold temperature, the bi-metal safety 315 is configured to shut-off the heater. The heater 310 and / or the bi-metal safety 315 may be connected to and controlled by the control system 200.

[0044] The drain 320 is located in the bottom of the wash tank 305 and is configured to drain water and / or soap water from the wash tank 305. In one or more embodiments, the drain 320 may be connected to a drain pump 322 that may be used to pump the drain water and / or soap water to drain mains DM. The drain 320 and / or drain pump 322 may be connected to and controlled by the control system 200.

[0045] The fluid level sensor assembly 325 is located within the wash tank 305 and is configured to monitor a level of fluid in the wash tank 305. Specifically, the fluid level sensor assembly 325 emits ultrasonic signals into the wash tank 305. The ultrasonic signals are reflected back to the fluid level sensor assembly 325. The fluid level sensor assembly 325 receives the reflected ultrasonic signals and communicates the reflected ultrasonic signals to the control system 200 where they are processed to determine the level of fluid in the wash tank 305.

[0046] The thermistor 330 is located within the wash tank 305 and is configured to monitor a temperature of the water in the wash tank 305. The thermistor 330 may be connected to and controlled by the control system 200.

[0047] The detergent dispenser 335 provides detergent to the wash tank 305 via the injector 340. The injector 340 may be connected to and controlled by the control system 200.

[0048] Within the wash tank 305, the water contained therein and the detergent are combined to create soap water that may be used to clean one or more objects as they travel along at least a portion of the rotary conveyor. Specifically, the pump 345 is connected to the wash tank 305 and is configured to pump soap water contained in the wash tank 305 to the upper wash arms 350 and the lower wash arms 355.

[0049] The upper wash arms 350 and lower wash arms 355 are positioned to dispense the soap water received from the wash tank 305 via the pump 345. Specifically, the upper wash arms 350 and the lower wash arms 355 are positioned above and below the rotary conveyor (not shown in FIG. 3), respectively. Each one of the wash arms includes at least one nozzle configured to direct the egress of soap water towards the rotary conveyor (not shown). The at least one nozzle may include a plurality of nozzles. In this manner, soap water from the wash tank 305 is used to clean one or more objects as they travel along the rotary conveyor (not shown).

[0050] The screen 365 is positioned between the upper wash arms 350 and the lower wash arms 355 and the wash tank 305. The screen 365 is used to capture or filter debris received from the one or more objects as they are cleaned.

[0051] During operation of the wash system 300, the wash tank 305 is filled with a predefined amount of water via the valve 360 and is filled with a predefined amount of detergent from the detergent dispenser 335 via the injector 340. The water and the detergent are combined within the wash tank 305 to create soap water. The soap water is heated to a predefined temperature using the heater 310.

[0052] As objects travel along a portion of the rotary conveyor, soap water is directed out of the nozzles of the upper wash arms 350 and the lower wash arms 355 and towards the objects. The soap water cleans the objects and excess soap water and any debris from the objects travels through the screen 365 and back into the wash tank 305. In the event that the amount of soap water in the wash tank 305 drops below a certain level, the control system 200 may perform operations to refill or top-up the wash tank 305 with water and detergent. In this manner, the wash system 300 may operate continuously to clean objects as they are placed on the rotary conveyor.

[0053] The rinse system 400 is positioned downstream of the wash system 300. Put another way, as objects travel along the rotary conveyor, they pass through the wash system 300 and then pass through the rinse system 400. In this manner, the objects are rinsed by the rinse system 400 after they are washed by the wash system 300.

[0054] The rinse system 400 is shown in FIG. 4. The rinse system 400 includes a valve 405, a sanitizer dispenser 410, a rinse-aid dispenser 415, an injector 420, an injection fitting 425, upper rinse arms 430, lower rinse arms 435 and a drain 440.

[0055] The rinse system 400 receives water from the water mains M via the valve 405. It will be appreciated that the water received from the water mains M may be cold water, that is, the water is not heated. The water travels to the injection fitting 425. The valve 405 may be connected to and controlled by the control system 200.

[0056] The sanitizer dispenser 410 provides sanitizer to the injection fitting 425 via the injector 420 and similarly the rinse-aid dispenser 415 provides rinse-aid to the injection fitting 425 via the injector 420. The injector 420 may be connected to and controlled by the control system 200. The injector 420 may be the same injector as the injector 340 of the wash system 300.

[0057] The injection fitting 425 receives the water from the water mains via the valve 405, the sanitizer from the sanitizer dispenser 410 via the injector 420, and rinse-aid from the rinse-aid dispenser 415 via the injector 420 and provides the mixture to the upper rinse arms 430 and the lower rinse arms 435.

[0058] The upper rinse arms 430 and the lower rinse arms 435 are positioned to dispense the mixture received from the injection fitting 425. Specifically, the upper rinse arms 430 and the lower rinse arms 435 are positioned above and below the rotary conveyor (not shown), respectively. Each one of the rinse arms includes at least one nozzle that is configured to direct the egress of the mixture towards the rotary conveyor (not shown). The at least one nozzle may include a plurality of nozzles. In this manner, the mixture of water, sanitizer and rinse-aid is used to rinse one or more objects as they travel along the rotary conveyor (not shown).

[0059] The drain 440 is located below the upper rinse arms 430 and the lower rinse arms 435. The drain 440 is configured to drain the mixture from the rinse system 400. The drain 440 may be connected to drain mains and as such the mixture received by the drain 440 may be drained out through the drain mains. Similar to the drain 320, the drain 440 may be connected to a drain pump which may be used to pump the mixture to the drain mains. The drain 440 and / or the drain pump may be connected to and controlled by the control system 200. A screen may be provided to capture or filter debris received from the one or more objects as they are rinsed and the screen may be positioned between the upper rinse arms 430 and the lower rinse arms 435 and the drain 440.

[0060] During operation of the rinse system 400, the injection fitting 425 receives the water from the water mains via the valve 405, the sanitizer from the sanitizer dispenser 410 via the injector 420, and rinse-aid from the rinse-aid dispenser 415 via the injector 420 and provides the mixture to the upper rinse arms 430 and the lower rinse arms 435.

[0061] After being washed by the wash system 300, objects travel along a portion of the rotary conveyor towards the rinse system 400. As the objects travel through the rinse system 400, the mixture is directed out of the nozzles of the upper rinse arms 430 and the lower rinse arms 435 towards the objects. The mixture rinses the objects and excess mixture travels down through the drain 440.

[0062] The upper wash arms 350 and the upper rinse arms 430 are connected to a housing of an upper spray arm assembly and the lower wash arms 355 and the lower rinse arms 435 are connected to a housing of a lower spray arm assembly.

[0063] The housing of the upper spray arm assembly and the housing of the lower arm spray assembly define at least one locating port that includes an opening. A spring-loaded connector that has a body complementary in shape to the locating port is used to connect the upper wash arms and upper rinse arms (or lower wash arms and lower rinse arms) to the housing.

[0064] In one or more embodiments, the spring-loaded connector includes a body and a yoke pivotally connected to the body via a torsion spring. The housing may include a feature that exerts a force on the yoke during insertion of the spring-loaded connector into the locating port and causes the yoke to pivot with respect to the body during the insertion. Prior to insertion, the torsion spring is in an unloaded position, during insertion, the torsion spring moves to a loaded position, and once connected to the housing the torsion spring moves back to the unloaded position.

[0065] The spring-loaded connector connects to at least one spray arm. In one or more embodiments, the spring-loaded connector connects to two spray arms such that the two spray arms extend out from the spring-loaded connector in a V-shape formation. It will be appreciated that the two spray arms may include two wash arms or two rinse arms.

[0066] The drain assembly 500 is shown in FIGS. 5 to 10. The drain assembly 500 includes a manifold drain 510, a drain tray 520, and a sealed fitting 530.

[0067] The manifold drain 510 is configured to receive and drain fluid from multiple sources. Specifically, the manifold drain 510 comprises a first inlet 512, a second inlet 514, and a third inlet 516, each configured to be connected via a sealed fitting or fluid conduit to a corresponding fluid source. The first inlet 512 is connected to and receives fluid from the drain tray 520, the second inlet 514 is connected to and receives fluid from the wash tank drain (such as the drain 320 described herein), and the third inlet 516 is connected to and receives fluid from the rinse tank drain (such as the drain 440 described herein). The manifold drain 510 includes an outlet 518 that is fluidly connected to the first inlet 512, the second inlet 514, and the third inlet 516 allowing for the drainage of fluids from each source.

[0068] In one or more embodiments, the manifold drain 510 comprises a body having a cylindrical wall. The first inlet 512, second inlet 514, and third inlet 516 are formed through the cylindrical wall and are circumferentially spaced apart from one another. The circumferential arrangement of the inlets facilitates organized routing of fluid sources into the manifold drain and improves overall fluid handling efficiency.

[0069] In one or more embodiments, the first inlet 512 is vertically offset from the second inlet 514 and the third inlet 516. The second inlet 514 is vertically offset from the first inlet 512 and the third inlet 516. The third inlet 516 is vertically offset from the first inlet 512 and the second inlet 514. These vertical offsets allow for increased fluid flow, reducing the risk of cross-contamination or clogging.

[0070] In one or more embodiments, the interior of the manifold drain 510 includes a sleeve 513 that fluidly separates the first inlet 512 from the second inlet 514. The sleeve 513 extends from the top of the manifold drain 510, past the first inlet 512, and continues to a position below the second inlet 514. The sleeve 513 ensures fluid isolation between the first inlet 512 and the second inlet 514, improving overall performance and preventing potential leakage or mixing of fluids. The sleeve 513 forms a dedicated fluid channel between the first inlet 512 and the outlet 518, and by extending below the second inlet 514, prevents turbulent fluid from the second source from mixing with fluid entering through the first inlet. In addition to serving as a passive fluid isolator, the sleeve 513 further provides anti-siphon functionality that maintains fluid levels within the wash tank and inhibits backflow from the drain pump into the wash water. The sleeve 513 thus acts as a passive fluid isolator. It will be appreciated that the top of the manifold drain 510 is closed, ensuring that fluid exits only through the designated outlet 518.

[0071] The sleeve 513 thus forms an internal partition within the manifold drain 510 that separates flow paths from different inlets. By directing each flow path to the outlet 518 while resisting siphoning or reversing pump effects, the sleeve 513 enhances both isolation and backflow prevention. This partitioning helps ensure fluid from the first inlet 512 is directed to the outlet 518 without interacting with fluid entering via the second inlet 514.

[0072] The drain tray 520 connects to the housing 110 of the on-demand glasswasher 100. Specifically, the drain tray 520 connects to the housing 110 at a position adjacent to a front portion of the glasswasher 100. The drain tray 520 may receive fluids dumped out of glasses to be washed by the glasswasher 100 and / or other fluids such as fluids splashed out of the on-demand glasswasher 100.

[0073] The drain tray 520 is connected to the first inlet 512 of the manifold drain 510 via the sealed fitting 530. In one or more embodiments, the drain tray 520 may include an outlet 522 that extends from a bottom surface thereof. The outlet 522 may be dimensioned to be received by the sealed fitting 530 and retained therein, such as by friction or an interference fit. At least one O-ring may be used to create a seal between the outlet 522 and the sealed fitting 530.

[0074] In one or more embodiments, the sealed fitting 530 includes an internal bore that is dimensioned to receive the outlet 522 of the drain tray 520 in a friction fit or interference fit. This connection provides a leak-resistant, mechanically stable interface between the drain tray 520 and the manifold drain 510.

[0075] In one or more embodiments, the bottom surface of the drain tray 520 includes a sloped surface to facilitate drainage and direct any fluid received therein towards the outlet 522 via gravity. The outlet 522 is positioned at the lowest point of the sloped surface to promote drainage.

[0076] The drain tray 520 prevents ambient fluid or accidental spills from entering the interior of the housing 110 and routes such fluids directly to the manifold drain 510 via the sealed fitting 530. This structure minimizes contamination risk and simplifies cleaning operations, particularly in high-volume or sanitary-sensitive environments such as for example bars or commercial kitchens.

[0077] The sealed fitting 530 securely connects the drain tray 520 to the manifold drain 510, ensuring leak-free operation. In some embodiments, the sealed fitting 530 includes at least one O-ring to prevent leaks and maintain a fluid-tight seal between the drain tray 520 and the manifold drain 510.

[0078] Additionally, the sealed fitting 530 may incorporate a locking mechanism that engages through a rotational motion, enhancing the reliability of the connection. As shown in FIG. 8, the sealed fitting 530 is inserted into the first inlet 512 at an angle and pushed inward. Once properly positioned within the first inlet 512, it is rotated to a vertical position, locking it in place. After installation, the outlet 522 of the drain tray 520 can be inserted into the sealed fitting 530 (see FIG. 9). The locking mechanism not only ensures a secure connection but also simplifies maintenance and installation.

[0079] In some embodiments, the locking mechanism of the sealed fitting 530 includes a locking tab that is biased outward. The locking tab is configured to engage with a corresponding recess formed in the manifold drain 510 when the sealed fitting 530 is rotated into its final position. This engagement secures the fitting in place and ensures a reliable mechanical and fluid connection.

[0080] Overall, the drain assembly 500 provides an efficient and reliable solution for managing drainage from multiple fluid sources in the on-demand glasswasher 100. The vertical offsets of the inlets, the interior sleeve, and the sealed fitting all contribute to the operation of the drain assembly 500. These features ensure proper fluid flow, prevent leaks, and minimize the risk of fluid mixing.

[0081] By integrating vertically offset inlets and an internal sleeve within the manifold drain, the drain assembly operates more efficiency by reducing the likelihood of backflow and cross-contamination. As mentioned, the sleeve 513 not only promotes unidirectional flow using gravitational advantage and internal channeling but also provides an anti-siphon function that maintains proper fluid levels within the wash tank and resists reverse flow caused by the drain pump. These integrated functions promote unidirectional flow using gravitational advantage and internal channeling while preventing water from the drain pump from being forced back into the wash water. These features improve the overall fluid management performance of the system without the need for additional pumps or valves.

[0082] In one or more embodiments, the drain assembly 500 is operatively integrated with the control system 200 such that drainage events are selectively initiated or regulated based on system conditions sensed or computed by the control system 200. For example, the control system 200 may receive inputs from fluid level sensors and / or thermistors in the wash tank and / or the rinse tank, and based on predefined threshold, may generate control signals to activate drain pumps connected to the manifold drain 510. The geometry of the manifold drain 510, including the vertically offset inlets, internal sleeve 513, and sealed fitting 530, enables the control system to efficiently manage multiple fluid sources without requiring a complex array of valves or flow switches. This architecture reduces system complexity and response latency while improving overall fluid evacuation efficiency. The control logic of the control system is simplified as it requires simplified binary pump control routines rather than the need to manage dynamically variable flow paths, thereby reducing processing cycles and memory usage. In this manner, the structural configuration of the drain assembly 500 contributes to a more efficient and deterministic software control model, improving the performance of the on-demand glasswasher system 100 as a whole.

[0083] In one or more embodiments, the drain pump is fluidly connected to inlet 514 of the manifold drain 510, and is controlled by the control system 200 in response to system conditions such as fluid level sensor signals. The outlet 518 of the manifold drain 510 then directs fluid to the building drain.

[0084] As shown in FIG. 11, the motor and conveyor system 900 includes a rotary conveyor 910 that is driven by a motor positioned therebelow. In this embodiment, the motor is a drive motor that is connected to the rotary conveyor 910 via a drive shaft and conveyor drive gear such that rotation of the motor causes rotation of the rotary conveyor 910. The motor is connected to and controlled by the control system 200.

[0085] In this embodiment, the rotary conveyor 910 comprises a plurality of concentric ribs 915 and a plurality of radially extending vanes 920. The radially extending vanes 920 are connected to the concentric ribs 915. The conveyor drive gear includes guides or teeth that are angled to receive the rotary conveyor 910 and ensure it is held in the correct position. Put another way, the conveyor drive gear includes guides or teeth that define slots that are complementary in shape with the vanes 920 and / or the ribs 915 and are used to connect the rotary conveyor 910 to the drive shaft and to ensure that the rotary conveyor 910 is held in the correct position.

[0086] The motor and conveyor system 900 may additionally include one or more components that may be used to control the operation thereof. For example, the motor and conveyor system 900 may include a sensor such as a proximity sensor that may be used to detect the presence of one or more objects on the rotary conveyor 910 which in turn may be used to control the operation of the on-demand glasswasher 100. For example, the sensor may communicate with the control system 200 to selectively start the motor when no object is detected in proximity of the sensor and may selectively stop the motor when an object is detected in proximity of the sensor.

[0087] The sanitary divider 1000 is shown in FIG. 12. In this embodiment, the sanitary divider 1000 includes a panel 1010 that is made of a rigid material such as for example plastic and the rigid material may be transparent. The panel 1010 is generally rectangular and includes a tapered section 1015 at a top side thereof. The tapered section 1015 extends downward from the top surface to a side of the panel 1010. The sanitary divider 1000 includes a bracket 1020 that is dimensioned to receive and retain the panel 1010. Specifically, the bracket 1020 includes parallel spaced apart sections that define an opening to receive and retain a portion of the panel 1010. Fasteners such as screws may be used to secure the panel 1010 in the bracket 1020. The bracket 1020 includes a hook 1025 that is dimensioned to connect to a portion of the housing 110.

[0088] In one or more embodiments, the sanitary divider 1000 divides or separates a load zone and a clean zone of the on-demand glasswasher 100 and this may ensure any dirt or debris from dirty or unwashed glasses does not contact or soil clean glasses located in the clean zone.

[0089] The cylinder 1100 is shown in FIG. 13. The cylinder 1100 may be made of a material such as for example stainless steel. The cylinder 1100 is dimensioned to be circumscribed by the rotary conveyor 910. Specifically, the cylinder 1100 is dimensioned to be positioned within the center of the rotary conveyor 910 such that at least a portion of the cylinder 1100 extends above the rotary conveyor 910 while still allowing the rotary conveyor 910 to rotate. The rounded surface of the cylinder 1100 prevents or otherwise minimizes the risk of glasses falling over or being scratched should they come into contact therewith.

[0090] Assembly of various components of the on-demand glasswasher 100 will now be described with respect to FIG. 14 which is a top plan view of the on-demand glasswasher 100. It will be appreciated that the on-demand glasswasher 100 is shown without a top covering for illustrative purposes only in FIG. 14.

[0091] The motor and conveyor system 900 are positioned within the housing 110. The lower wash arms 355 and the lower rinse arms 435 are located directly beneath the upper wash arms 350 and the upper rinse arms 430, respectively.

[0092] As mentioned, the motor and conveyor system 900 may additionally include one or more components that may be used to control the operation thereof. In the example shown in FIG. 14, the motor and conveyor system 900 includes a sensor 1300 that is positioned within the housing 110 of the on-demand glasswasher 100.

[0093] The hook 1025 of the sanitary divider 1000 connects to a portion of the housing 110. In the example shown in FIG. 14, the sanitary divider 1000 is positioned adjacent to the sensor 1300 of the motor and conveyor system 900 and such that the panel 1010 extends into the housing 110.

[0094] The cylinder 1100 is positioned within the center of the rotary conveyor 910 such that at least a portion of the cylinder 1100 extends above the rotary conveyor 910 while still allowing the rotary conveyor 910 to rotate.

[0095] The on-demand glasswasher 100 includes four zones. A load zone is defined at a first end of the housing 110. The load zone may be defined on a particular side of the sanitary divider 1000. Specifically, the load zone may be defined such that any objects placed on the rotary conveyor 910 travel in a direction away from the sanitary divider 1000. During use, a user places objects to be cleaned onto the rotary conveyor 910 at a location that corresponds to the load zone.

[0096] A wash zone is defined intermediate the upper wash arms 350. The wash zone is downstream of the load zone. As objects travel along the rotary conveyor (in the direction indicated by arrow A in FIG. 14) into the wash zone, the objects are washed by the wash system 300 in manners described herein.

[0097] A rinse zone is defined intermediate the upper rinse arms 430. The rinse zone is downstream of the wash zone. As objects travel along the rotary conveyor (in the direction indicated by arrow A in FIG. 14) into the rinse zone, the objects are rinsed by the rinse system 400 in manners described herein.

[0098] A clean zone is defined at the front end of the housing 110. The clean zone is downstream of the rinse zone. The clean zone may be defined on a second side of the sanitary divider 1000. In this manner, the sanitary divider 1000 divides or separates the load zone and the clean zone and this may ensure any dirt or debris from dirty or unwashed glasses does not contact or soil clean glasses located in the clean zone. During use, once objects have been washed and rinsed, they remain in the clean zone until the user removes them from the rotary conveyor.

[0099] FIG. 15 is an exploded view of a tank of the on-demand glasswasher described herein. The tank generally has an upper portion 1510, a lower portion 1520, and a sump wash tank 1530. The tank includes an integrated tank and wash chamber. The wash tank 305 may be of the same type as the tank shown in FIG. 15.

[0100] As noted, certain adaptations and modifications of the described embodiments can be made. Therefore, the above discussed embodiments are considered to be illustrative and not restrictive.

Examples

Embodiment Construction

[0016]Accordingly, in one aspect, there is provided a drain assembly that comprises a manifold drain. The manifold drain comprises a first inlet connectable to a drip tray positioned adjacent a front portion of a glasswasher, a second inlet connectable to a wash tank drain of the glasswasher, a third inlet connectable to a rinse tank drain of the glasswasher, and an outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

[0017]In one or more embodiments, the first inlet is vertically offset from the second inlet and the third inlet.

[0018]In one or more embodiments, the second inlet is vertically offset from the first inlet and the third inlet.

[0019]In one or more embodiments, the third inlet is vertically offset from the first inlet and the second inlet.

[0020]In one or more embodiments, an interior of the manifold drain includes a sleeve that fluidly separates the first inlet from the second inlet.

[0021]In one or more embodiments, the sleeve extends from a...

Claims

1. A glasswasher drain assembly comprising:a manifold drain comprising:a first inlet connectable to a drain tray positioned adjacent a front portion of a glasswasher;a second inlet connectable to a wash tank drain of the glasswasher;a third inlet connectable to a rinse tank drain of the glasswasher; andan outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

2. The drain assembly of claim 1, wherein the first inlet is vertically offset from the second inlet and the third inlet.

3. The drain assembly of claim 1, wherein the second inlet is vertically offset from the first inlet and the third inlet.

4. The drain assembly of claim 1, wherein the third inlet is vertically offset from the first inlet and the second inlet.

5. The drain assembly of claim 1, wherein an interior of the manifold drain includes a sleeve fluidly separating the first inlet and the second inlet.

6. The drain assembly of claim 5, wherein the sleeve extends from a top of the manifold drain, past the first inlet, and to a position below the second inlet.

7. The drain assembly of claim 1 wherein a top of the manifold drain is closed and is opposite the outlet.

8. The drain assembly of claim 1, wherein the first inlet connects to the drain tray via a sealed fitting.

9. The drain assembly of claim 8, wherein the sealed fitting includes at least one O-ring for leak prevention.

10. The drain assembly of claim 8, wherein the sealed fitting includes a locking mechanism that is engaged in response to rotation of the sealed fitting within the first inlet of the manifold drain.

11. The drain assembly of claim 1, further comprising the drain tray.

12. The drain assembly of claim 11, wherein the drain tray comprises an output configured to direct egress of fluid from the drain tray to the manifold drain.

13. The drain assembly of claim 12, wherein the drain tray comprises a sloped bottom surface to facilitate drainage, directing fluid received therein towards the outlet via gravity.

14. An on-demand glasswasher comprising:a drain tray removably connected to a front portion of a housing; anda drain assembly comprising:a manifold drain comprising:a first inlet connected to the drain tray via a sealed connector;a second inlet connected to a wash tank drain;a third inlet connected to a rinse tank drain; andan outlet fluidly connected to the first inlet, the second inlet, and the third inlet.

15. The on-demand glasswasher of claim 14, wherein the manifold drain comprises a body having a cylindrical wall, and the first, second, and third inlets are circumferentially spaced apart along the cylindrical wall.

16. The on-demand glasswasher of claim 14, wherein the sealed connector comprises a sealed fitting received in the first inlet of the manifold drain, the sealed fitting including an internal bore dimensioned to receive an outlet of the drain tray in a friction fit.

17. The on-demand glasswasher of claim 14, wherein the sealed connector further comprises a locking tab that is biased outward and engages a recess in the manifold drain when the sealed fitting is rotated into position.

18. The on-demand glasswasher of claim 14, wherein the drain tray comprises a drain outlet located at a lowest point of a sloped bottom surface.

19. The on-demand glasswasher of claim 14, wherein the manifold drain further comprises a sleeve extending from a top of the manifold drain to a location below the second inlet, the sleeve forming an internal partition that directs fluid from the first inlet to the outlet while fluidly isolating the second inlet.

20. The on-demand glasswasher of claim 14, further comprising a control system configured to activate a drain pump in response to fluid level signals from one or more fluid level sensors in the wash tank and the rinse tank, wherein the drain pump is fluidly connected to the outlet of the manifold drain.

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