Accurate chemical dispensing device with residual quantity detection

Abstract

A dispensing device for a washing machine and a method for making the same are provided. A dispensing device for a washing machine includes a first portion configured to hold and dispense solid and liquid detergents and a second portion configured to hold and dispense solid and liquid rinse aids, wherein at least one of the first and second portions includes at least one weight sensor on a bottom interior surface, the at least one weight sensor configured to monitor the amount of remaining contents of at least one of the first and second portions.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application relates generally to washing machines, and more particularly to a method and apparatus for an accurate chemical dispensing device with residual volume detection for use with washing machines, such as dishwashers. [Background technology]

[0002] A dishwasher, also called a warewashing machine or ware-cleaning machine, is a machine for automatically cleaning items such as dishes, trays, labware, cutlery, and kitchen utensils. Typical domestic dishwashers are under-counter units intended for installation under a countertop. Other types of dishwashers include industrial or commercial dishwashers for use in restaurants, hotels, and other commercial establishments with food and beverage service.

[0003] A typical dishwasher may use various types of liquid or solid detergents (or chemicals) along with water to clean items. Some chemicals are not used properly or fully utilized, resulting in inefficient chemical use, which increases the cost of operating the dishwasher and the storage space required for the dishwasher chemicals.

[0004] There is a need for an improved dispenser or dispensing device for dishwashers that provides accurate chemical dispensing and residual quantity detection and that can be used with a variety of different types of chemicals or detergents. Summary of the Invention

[0005] Summary of the Invention

[0006] An accurate chemical dispensing and dispensing device with remaining quantity detection is provided. In one example, a dispensing device for a washing machine includes a first portion configured to hold and dispense solid and liquid detergents and a second portion configured to hold and dispense solid and liquid rinse aids. At least one of the first or second portions includes at least one weight sensor on a bottom interior surface, the at least one weight sensor configured to monitor the amount of remaining contents of at least one of the first or second portions.

[0007] In some examples, the device may also include a one-way pressure relief valve configured to prevent the contents of the first and second portions from flowing into an attached water supply. In some examples, the device may also include a magnetic door switch configured to prevent flushing of the first and second portions when the door of the dispensing device is open.

[0008] This Summary is an overview of some of the teachings of the present application and is not intended to be an exclusive or exhaustive treatment of the present subject matter. Further details regarding the present subject matter are found in the detailed description and appended claims. The scope of the present invention is defined by the appended claims and their legal equivalents. [Brief explanation of the drawings]

[0009] The drawings generally illustrate, by way of example, various embodiments discussed in the present document. The drawings are for illustration purposes only and may not be to scale.

[0010] [Figure 1A] 1 shows a perspective view of a chemical dispensing device for a dishwasher according to various embodiments of the present inventive subject matter.

[0011] [Figure 1B] 1B shows a rear view of the chemical dispensing device of FIG. 1A according to various embodiments of the present inventive subject matter.

[0012] [Figure 1C] 1B illustrates the chemical dispensing device of FIG. 1A with a circular barrel solid detergent and solid rinse aid according to various embodiments of the present inventive subject matter.

[0013] [Figure 2A] 1 illustrates a chemical dispensing device for a dishwasher with a peanut-shaped barrel solid detergent and solid rinse aid according to various embodiments of the present inventive subject matter.

[0014] [Figure 2B] 2B shows a tray for supporting the peanut-shaped barrel solid detergent of FIG. 2A, according to various embodiments of the present inventive subject matter.

[0015] [Figure 3A] 1 illustrates a chemical dispensing device for a dishwasher with a compressed solid detergent and a solid rinse aid according to various embodiments of the present inventive subject matter.

[0016] [Figure 3B] 3B illustrates a housing for supporting the compressed solid detergent of FIG. 3A, according to various embodiments of the present inventive subject matter.

[0017] [Figure 4] 1 illustrates a chemical dispensing device for a dishwasher with a circular barrel solid detergent and liquid rinse aid according to various embodiments of the present inventive subject matter.

[0018] [Figure 5] 1 illustrates a chemical dispensing device for a dishwasher with liquid detergent and solid rinse aid according to various embodiments of the present inventive subject matter.

[0019] [Figure 6] 1 illustrates the interior of a chemical dispensing device for a dishwasher with a one-way pressure relief valve and a solenoid valve according to various embodiments of the present inventive subject matter.

[0020] [Figure 7]1 illustrates the interior of a chemical dispensing device for a dishwasher including a pump module and a solenoid valve, according to various embodiments of the present inventive subject matter.

[0021] [Figure 8A] 1 illustrates the interior of a chemical dispensing device for a dishwasher with a weight sensor, according to various embodiments of the present inventive subject matter.

[0022] [Figure 8B] 1 illustrates the interior of a chemical dispensing device for a dishwasher with multiple weight sensors, according to various embodiments of the present inventive subject matter.

[0023] [Figure 9A] 1 shows a table containing test results for sensing detergent in a circular barrel in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter.

[0024] [Figure 9B] 1 shows a table containing test results for sensing detergent in a peanut-shaped barrel in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter.

[0025] [Figure 9C] 1 shows a table containing test results for sensing compressed solid detergent in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter.

[0026] [Figure 10] 1 shows a table containing test results for sensing solid rinse aid in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter.

[0027] [Figure 11A] 11A shows an embodiment of a dishwasher, with FIG. 11A being a front view. [Figure 11B] 11B is a side view of an embodiment of a dishwasher with the hood closed. FIG. [Figure 11C]11C is a side view of an embodiment of a dishwasher with the hood open. [Figure 11D] 11A and 11B show an embodiment of a dishwasher, with FIG. 11D being a top view.

[0028] [Figure 12] 11B illustrates the dishwasher embodiment of FIG. 11A with example accessories.

[0029] [Figure 13] 11B is a diagram of an embodiment of the hydraulic system of the dishwasher of FIG. 11A. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following detailed description of the present subject matter refers to subject matter in the accompanying drawings, which show, by way of illustration, specific aspects and embodiments in which the present subject matter may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present subject matter. References in this disclosure to "a," "one," or "various" embodiments do not necessarily refer to the same embodiment, and such references contemplate multiple embodiments. The scope of the present invention is defined by the appended claims, along with the full scope of legal equivalents to which such claims are entitled.

[0031] Currently, catering and restaurant companies are tending to form chains, and all catering companies are placing higher requirements on downsizing of warehouses, maximizing utilization of warehouse space, and diversifying kitchen equipment. Even with a small fixed storage capacity, restaurant workers expect to apply more electrical equipment. Therefore, higher requirements are placed on the space utilization of electrical equipment in the kitchen, such as dishwashers.

[0032] A typical dishwasher may use various types of liquid or solid detergents (or chemicals) along with water to clean items. Some chemicals are not used properly or fully utilized, resulting in inefficient chemical use, which increases the cost of operating the dishwasher and the storage space required for the dishwasher chemicals.

[0033] Therefore, it is desirable for a chemical dispenser for a dishwasher to be compatible with as many chemicals as possible, so that a single dispenser can meet a variety of needs. When different businesses use different chemical solutions, this universal dispenser not only increases equipment utilization but also facilitates after-sales maintenance.

[0034] Commercially available chemicals are expensive, but currently they cannot be adequately monitored in their actual use process, resulting in some chemicals being used improperly or not fully utilized. The chemical use process should be monitored in real time to understand the usage status and utilization rate of each chemical.

[0035] Dishwasher detergents are primarily composed of sodium hydroxide, sodium carbonate, and various designated dryer activators. The dispenser's primary function is to precisely dispense the amount of detergent required for each wash into the dishwasher. When the dishwasher finishes washing and enters the drying process, the dispenser can precisely dispense the necessary surfactants into the dishwasher. Thus, the dispenser dispenses chemicals into the dishwasher on time and as required, and receives and provides feedback on various signals within the dishwasher.

[0036] The present subject matter provides a universal dispenser or chemical dispensing device that automatically delivers chemicals (detergent, rinse aid, etc.) and automatically provides feedback on remaining chemical levels. The chemical dispensing device (also referred to herein as a dispenser or dispensing device) is compatible with several different washers and dishwashers, including, but not limited to, the dishwashers shown in Figures 11A-13. The chemical dispensing device is compatible with a variety of different brands and types of chemicals, including liquids and solids, and is configured to provide safe use and easy maintenance. The chemical dispensing device is configured to monitor remaining chemicals in real time and meets all waterproofing requirements for commercial dishwasher operation.

[0037] FIG. 1A illustrates a perspective view of a chemical dispensing device 100 for a dishwasher, according to various embodiments of the present inventive subject matter. FIG. 1B illustrates a rear view of a chemical dispensing device 100 for a dishwasher, according to various embodiments of the present inventive subject matter. The present invention provides a chemical dispensing device 100 that can dilute and dispense required chemicals into the appliance on demand. The chemical dispensing device 100 is compatible with a variety of solid and liquid chemicals, includes mechanisms to ensure safe use, and provides real-time monitoring of the current chemical remaining in the dispenser. In various examples, the chemical dispensing device 100 meets the chemical dispensing and quick interface requirements of many different dishwashers for compatibility. In various embodiments, the chemical dispensing device 100 meets the waterproof capabilities of the IPX4 standard.

[0038] FIG. 1C illustrates a chemical dispensing or dispensing device for a dishwasher including a circular barrel solid detergent and a solid rinse aid according to various embodiments of the present inventive subject matter. The dispensing device 100 is shown with the top of the housing removed and includes a first portion 102 configured to hold and dispense solid and liquid detergents and a second portion 104 configured to hold and dispense solid and liquid rinse aids. In the illustrated embodiment, the first portion 102 contains a circular barrel solid detergent 112, and the second portion 104 contains a solid rinse aid 114. In some examples, the circular barrel solid detergent 112 includes a solid circular carton with liquid detergent therein. In various examples, the dispensing device 100 further includes a display 105 for providing a user of the device with an indication of the remaining detergent and rinse aid. In various embodiments, methods of forming chemical dispensing or dispensing devices as described herein are provided.

[0039] 2A illustrates a chemical dispensing or dispensing device for a dishwasher including a peanut-shaped barrel solid detergent and a solid rinse aid according to various embodiments of the present inventive subject matter. Dispensing device 200 is shown with the top of the housing removed and includes a first portion 202 configured to hold and dispense solid and liquid detergents and a second portion 204 configured to hold and dispense solid and liquid rinse aids. In the illustrated embodiment, first portion 202 contains peanut-shaped barrel solid detergent 212, and second portion 204 contains solid rinse aid 214. In some examples, peanut-shaped barrel solid detergent 212 includes a solid peanut-shaped carton with liquid detergent inside the carton.

[0040] 2B illustrates a tray 222 for supporting the peanut-shaped barrel solid detergent 212 of FIG. 2A, according to various embodiments of the present inventive subject matter. When using the peanut-shaped solid detergent 212, in various examples, the tray 222 may be added to the first section 202 so that the peanut-shaped solid detergent 212 can rest stably in its installed position.

[0041] 3A illustrates a chemical dispensing or dispensing device for a dishwasher comprising a compressed solid detergent and a solid rinse aid according to various embodiments of the present inventive subject matter. The dispensing device 300 is shown with the top of the housing removed and comprises a first portion 302 configured to hold and dispense solid and liquid detergents and a second portion 304 configured to hold and dispense solid and liquid rinse aids. In the illustrated embodiment, the first portion 302 contains compressed solid detergent 312 and the second portion 304 contains solid rinse aid 314.

[0042] 3B illustrates a housing 332 for supporting the compressed solid detergent 312 of FIG. 3A, according to various embodiments of the present inventive subject matter. When using a compressed solid detergent 312, in various examples, the housing 332 may be added to the first portion 302 to allow the compressed solid detergent 312 to remain stable in its installed position. In some examples, the compressed solid detergent 312 has a peanut shape, as shown in FIG. 3B.

[0043] FIG. 4 illustrates a chemical dispensing or dispensing device for a dishwasher with a circular barrel solid detergent and liquid rinse aid according to various embodiments of the present inventive subject matter. FIGS. 4-5 are rear perspective views of the dispensing device 400, shown with the top of the housing removed, including a first portion 402 configured to hold and dispense solid and liquid detergents and a second portion 404 configured to hold and dispense solid and liquid rinse aids. In the illustrated embodiment, the first portion 402 contains solid detergent 412, and the second portion 404 contains liquid rinse aid 414. To accommodate the liquid rinse aid 414, in various examples, the pump inlet is relocated from inside to outside the second portion 404, and the flushing system 424 for the solid rinse aid is removed. In various embodiments, to accommodate liquid rinse aid 414, one-way pressure relief valve 434 is removed and solid rinse aid solenoid valve 444 is removed. In various examples, liquid rinse aid 414 can be drawn from outside of dispensing device 400 using liquid rinse aid port 454. The dispensing device, in various embodiments, can be used with a number of different solid, pressed solid, and liquid detergent, rinse aid, and descaling aid chemicals. Examples include, but are not limited to, detergents such as Solid Powder Plus, Solid Ultra Clean, Pressed Solid, and Express; rinse aids such as Elite and Solid Ultra Dry; and descaling aids such as Strip Away.

[0044] FIG. 5 illustrates a chemical dispensing or dispensing device for a dishwasher with liquid detergent and solid rinse aid according to various embodiments of the present inventive subject matter. The dispensing device 400 is shown with the top of the housing removed and includes a first compartment 502 configured to hold and dispense solid and liquid detergent and a second compartment 504 configured to hold and dispense solid and liquid rinse aid. In the illustrated embodiment, the first compartment 502 contains liquid detergent 512, and the second compartment 504 contains solid rinse aid 514. To accommodate the liquid detergent 512, in various examples, a liquid detergent pump 552 has been added, and the flushing system 522 for the solid detergent has been removed. In various embodiments, the solid detergent solenoid valve 542 has been removed, and the one-way pressure relief valve 532 has been removed to accommodate the liquid detergent 512. In various embodiments, the embodiments of Figure 4 (for the liquid rinse aid portion) and Figure 5 (for the liquid detergent portion) may be combined to accommodate dispensing of liquid detergent and liquid rinse aid.

[0045] FIG. 6 illustrates the interior of a chemical dispensing or dispensing device for a dishwasher, including a one-way pressure relief valve and a solenoid valve, according to various embodiments of the present inventive subject matter. Various portions of the present inventive subject matter provide for easy maintenance and safe use of the chemical dispensing or dispensing device 600. The use of a one-way pressure relief valve 610, in various examples, can prevent siphoning and ensure that chemicals do not backflow into the tap water circuit. In one example, after the solenoid valve 620 is opened, water enters the one-way relief valve 610 and then enters the flushing system. When the solenoid valve 620 is closed, the water in the inlet section of the pressure relief valve 610 remains unchanged, while the outlet section descends with gravity, allowing air to enter the top opening of the valve and isolate the tap water from water that may contain chemicals. Even if the solenoid valve fails to close, siphoning occurs, separating the chemical-containing water with an air column, preventing contamination of the water source.

[0046] In various examples, the present subject matter provides for the use of a magnetic door switch that can prevent accidental opening of the cover and spraying of the spray system. In various examples, when the cover of the dispenser is opened, the magnetic door switch shuts off the solenoid valve to prevent flushing from occurring.

[0047] FIG. 7 illustrates the interior of a chemical dispensing or dispensing device for a dishwasher, including a pump module and solenoid valves, according to various embodiments of the present inventive subject matter. In various examples, the descaler pump, detergent pump, and rinse aid pump are all secured to the base of the dispensing device 700 via a sheet metal bracket. In the event of a pump failure, a user can remove the three pumps together by removing two pump module fixing screws 710 on the sheet metal, which is very convenient for maintaining the pumps. The detergent solenoid valve and rinse aid solenoid valve are also secured using solenoid valve module fixing screws 720. In various examples, removing the fixing screws 720 on the sheet metal allows a user to remove the two solenoid valves together for convenient maintenance. In various examples, the chemical dispensing or dispensing device is connected or attached to a water source to support chemical dispensing and flushing of the respective compartments.

[0048] 8A shows the interior of a chemical dispensing or dispensing device for a dishwasher equipped with a weight sensor, according to various embodiments of the present inventive subject matter. In various examples, the dispensing device provides real-time monitoring of remaining chemicals (detergent or rinse aid). In various embodiments, one or more weight sensors 822 are positioned at or near the bottom surface 820 of the chemical container 810 and convert changes in the weight signal into changes in a current signal to detect changes in chemical weight in real time.

[0049] 8B shows the interior of a chemical dispensing or dispensing device for a dishwasher with multiple weight sensors, according to various embodiments of the present inventive subject matter. In various embodiments, four weight sensors 822 are evenly spaced at the bottom of the chemical basin to detect changes in the weight of the chemical basin in real time. Other numbers of sensors may also be used without departing from the scope of the present inventive subject matter.

[0050] FIG. 9A shows a table containing test results for sensing a round barrel detergent in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter. For a round barrel compatible detergent, the dispensed detergent concentration is tested as indicated in the table. FIG. 9B shows a table containing test results for sensing a peanut-shaped barrel detergent in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter. For a peanut-shaped barrel compatible detergent, the dispensed detergent concentration is tested as indicated in the table. FIG. 9C shows a table containing test results for sensing a compressed solid detergent in a chemical dispensing device for a dishwasher, according to various embodiments of the present inventive subject matter. For a compatible compressed solid detergent, the dispensed detergent concentration is tested as indicated in the table. As shown from the test results in each table, the desired concentration accuracy of ±2 drops is met using a dispensing device of the present inventive subject matter.

[0051] 10 shows a table containing test results for sensing solid rinse aid in a chemical dispensing device for a dishwasher according to various embodiments of the present inventive subject matter. A suitable solid rinse aid is tested for single-dispense accuracy as shown in the table. As shown in the test results in the table, the desired concentration accuracy of 6% to 12% is met. Therefore, the single-dispense accuracy of detergent and rinse aid is high.

[0052] Furthermore, the dispensing device provides safety and easy maintenance. The dispenser's one-way pressure relief valve indicates that during normal use, there is an air column of more than 20 cm at the top end of the one-way valve's outlet pipe, which meets the requirement of preventing chemicals from unintentionally entering the water supply. After the cover is opened, the magnetic switch is disconnected, causing the dispenser to stop operating and preventing the flushing system from engaging. Installation and maintenance of the various pumps and solenoid valves is convenient, providing additional benefits to users. As indicated above, the dispensing device provides real-time monitoring of remaining chemicals. In various embodiments, the dispenser displays the current remaining amount of chemical, and as chemicals are consumed, a light illuminates on the display, accompanied in one embodiment by an audible alarm. In some embodiments, the light illuminates with or without an audible alarm. In some embodiments, the audible alarm may be independent of the light on the display. In various examples, a light and / or alarm may be activated when the amount of remaining chemical is detected or the weight falls below a programmable threshold. In various embodiments, the remaining detergent and rinse aid are monitored separately.

[0053] As used in this disclosure, a "dishwasher" (also known as a dishwasher, warewasher, or warewasher) may include any type of washing machine capable of using detergent for cleaning and / or sanitizing purposes in a domestic or commercial environment. Items washed in a dishwasher may include dishes, plates, pots and pans, cutlery, flatware, glasses, utensils, serving pans, trays, etc. Such items may be placed in a dishwasher rack within the dishwasher. A "dishwasher rack" (also known as a warewashing rack) may include any rack used in a dishwasher to hold any items to be washed. Unless otherwise stated, "rack" in this disclosure refers to a dishwasher rack. The rack may be a built-in part of the dishwasher or a removable accessory suitable for use in a dishwasher. The rack may be a peg rack or an open rack and may have any size and shape suitable for a dishwasher. Each dishwasher may include one or more built-in racks and / or may accommodate one or more removable racks.

[0054] As used in this disclosure, a "wash cycle" of a dishwasher may include various operating periods, such as one or more of a descaling period, a washing period, a rinsing period, and a drying period, depending on the availability of the respective operating modes in the dishwasher and the settings entered by the user of the dishwasher. "Washing" may include washing only, sanitizing only, washing and sanitizing, descaling and washing, or descaling, washing, and sanitizing. A "descaling period" includes a period or operating mode during which a descaling solution formed by water and a descaling agent is intended to be applied to objects to be washed. A "washing period" includes a period or operating mode during which a washing solution formed by water and a detergent is intended to be applied to objects to be washed. A "rinsing period" includes a period or operating mode during which water, or a rinse solution formed by water and a rinse aid and / or sanitizing agent, is intended to be applied to objects to be washed. Some dishwashers (e.g., commercially available dishwashers) may include a rinse period primarily for sanitizing by thermal and / or chemical means. The descaling agent, detergent, rinse aid, and sanitizer may each be a chemical agent or mixture of chemical agents in liquid or solid form. A "drying period" includes a period or mode of operation intended to dry the washed object by airflow and / or heat without the application of additional water and / or chemical agents.

[0055] The trend toward franchising food service businesses is driving the need for store downsizing while maximizing store floor space utilization and diversifying kitchen equipment. Stores (e.g., restaurants) may face the challenge of increasing their use of electrically powered equipment without increasing the capacity of their existing power systems. The power available to operate dishwashers, an electrical appliance commonly used in restaurants or other food service establishments, may be limited while ensuring that the dishwasher's cleaning effectiveness is not compromised.

[0056] The chemical dispensing device 100 (also referred to herein as a dispenser or dispensing device) of the present subject matter is compatible with several different washing machines and dishwashers, including, but not limited to, the dishwasher 1100 shown in Figures 11A-13. In one example, the chemical dispensing device 100 is used as a dispenser 1105, discussed below.

[0057] 11A, 11B, 11C, and 11D are diagrams of an embodiment of a dishwasher 1100. As shown in FIGS. 11A-11D and discussed as an example for illustrative but not limiting purposes, the dishwasher 1100 is a hood-type dishwasher that includes a hood 1102 for covering a wash chamber (also known as a main wash chamber) 1101 during each wash cycle. A hood lift handle 1103 can be lifted by a user to open the hood 1102 to place items to be washed into the wash chamber 1101 before a wash cycle, lowered by a user to close the hood 1102 and cover the wash chamber 1101 before starting a wash cycle, and lifted by a user to open the hood 1102 to remove items that have been washed after the wash cycle is complete. A hood lock 1104 attached to the hood 1102 automatically locks when the wash cycle begins to prevent the hood 1102 from accidentally opening during the wash cycle. Figure 11A shows a front view of the dishwasher 1100 when the hood 1102 is closed. Figure 11B shows a side view of the dishwasher 1100 when the hood 1102 is closed. Figure 11C shows a side view of the dishwasher 1100 when the hood 1102 is open. Figure 11D shows a top view of the dishwasher 1100.

[0058] The dishwasher 1100 includes a dispenser 1105 containing various chemicals for dispensing during different periods of the wash cycle. Each chemical may be in liquid or solid form, and the dispenser 1105 is configured to accommodate the liquid and / or solid forms of each chemical depending on the form of the chemical that is available and intended for use. Each chemical in the dispenser 1105 is refillable. In one example, the dishwasher 1100 can perform a wash cycle that includes a descaling period, a wash period, and a rinse period, and the dispenser 1105 can contain a descaling agent, a detergent, and a rinse aid and is an all-in-one dispenser that can dispense the descaling agent for use during the descaling period, the detergent for use during the wash period, and the rinse aid for use during the rinse period.

[0059] The dishwasher 1100 includes a user interface 1106 that visually and / or audibly indicates its operating status and allows a user to control its operation. The user interface 1106 may include a display screen, such as a touchscreen, that displays the operating status of the dishwasher 1100 and can receive commands and other information from the user. The user interface 1106 may include a power switch that allows a user to turn the dishwasher 1100 on and off. The user interface 1106 allows a user to start a wash cycle, optionally after indicating that the user is ready to begin the wash cycle (e.g., after the hood 1102 is closed). In one example, the user interface 1106 allows a user to select which periods to include in the wash cycle. For example, if the dishes are known to be clean but require sanitizing, the user may select only the rinse period. The user may select the wash and rinse periods only when the dishes have not indicated that they need to be descaled. In another example, the user interface 1106 is configured (eg, programmed) to follow sanitation procedures and / or comply with regulations to ensure food safety.

[0060] The dishwasher 1100 provides high space and power efficiency to reduce operating costs and / or enable food service facilities to operate under limited space and / or power capacity. For example, the dishwasher 1100 includes an internal wastewater recycle system 1107 and an internal steam reduction system 1111 for recovering thermal energy generated from operation during each wash cycle to heat clean water used in operation. The wastewater recycle system 1107 includes a wash tank (also known as a main wash tank) 1108 that recycles the hot wash solution sprayed into and returned from the wash chamber 1101 during the wash period, and a wastewater tank 1109 (also known as an overflow tank) that receives excess hot wash solution from the wash tank 1108 as wastewater. A heat exchange module is disposed within the wastewater tank 1109 to heat the clean water while cooling the wastewater before the wastewater is discharged to a drain (e.g., a drain connected to a building's sewer). The heated clean water is added to the wash tank 1108 and the booster tank (also known as the rinse tank) 1110 as needed. In the example shown, the booster tank 1110 receives clean water and a descaling agent to form the descaling liquid that is sprayed into the wash chamber 1101 during the descaling period, and clean water and a rinse aid to form the rinse liquid that is sprayed into the wash chamber 1101 during the rinse period. The steam reduction system 1111 comprises a fan 1112 to draw steam from the wash chamber 1101 and a condenser 1113 located in the steam path to condense the steam while heating the clean water (in addition to recovering heat from the wastewater). The fan 1112 blows any remaining steam out of the dishwasher 1100.

[0061] The dishwasher 1100 may be sized to allow easy operation and maintenance by users having a height of 150 cm or greater. The force required to open the hood 1102 by lifting the hood lift handle 1103 may be approximately 3.5 kg or less. In one example, the wash tank 1108 has a capacity of approximately 24 L, the waste water tank 1108 has a capacity of approximately 12 L, and the booster tank 1110 has a capacity of approximately 10 L.

[0062] FIG. 12 is a diagram of an embodiment of a dishwasher 1100 with several accessories. As shown in FIG. 12 by way of illustrative but not limiting example, the accessories may include a dirty dish stand 1220, a clean dish stand 1223, a dishwasher rack 1224, and a vent hood 1225. The dirty dish stand 1220 includes one or more sinks 1221 and one or more faucets 1222. If necessary or convenient, dishes and / or other objects to be washed can be placed in the sink 1221 and pre-washed using water from the faucet 1222 (with the hood 1102 open) before being placed in the wash chamber 1101. The rack 1224 may be placed in the wash chamber 1101 when empty, and dishes and / or other objects may be placed in the rack 1224 for each wash cycle. After the wash cycle is complete, the rack 1224 containing the washed dishes and / or other objects may be removed from the wash chamber 1101 (with the hood 1102 open) and placed on the clean dish stand 1223 prior to use and / or further dispensing. The ventilation hood 1225 allows steam blown out of the dishwasher 1100 by the fan 1112 to be vented to the exterior of the building in which the dishwasher 1100 is located.

[0063] Figure 13 is a diagram of an embodiment of a hydraulic system 1329 of the dishwasher 1100. As an illustrative but non-limiting example, as shown in Figure 12, the hydraulic system 1329 can support liquid transfer functions during the descaling, washing, and rinsing periods.

[0064] The hydraulic system 1329 includes a main water valve 1335 (e.g., a solenoid-controlled valve) that can be opened to receive clean water from a water source (e.g., a building's water main). The clean water can be heated in the waste water tank 1109 and then sent to the cleaning tank 1108 and booster tank 1110. Clean water can also be sent to the dispenser 1105 through a dispenser valve 1336 if needed (e.g., to dissolve one or more chemical agents in solid form).

[0065] During the descaling period, descaling agent is dispensed from dispenser 1105 into booster tank 1110 to form descaling liquid together with heated clean water in booster tank 1110. The descaling liquid is pumped by rinse pump 1333 to rinse arm 1330. The rinse arm 1330 is positioned above and below the wash chamber 1101 and rotates to spray descaling liquid from above and below into the wash chamber 1101. After passing through the wash chamber 1101, the descaling liquid flows into the wash tank 1108.

[0066] During the wash period, detergent is dispensed from dispenser 1105 into wash tank 1108 to form a wash liquid together with heated clean water in wash tank 1108. The wash liquid is pumped by wash pump 1331 to wash arm 1332. Wash arm 1332 is positioned above and below wash chamber 1101 and rotates to spray the wash liquid from above and below into wash chamber 1101. After passing through wash chamber 1101, the wash liquid returns to wash tank 1108.

[0067] During the rinse period, rinse aid is dispensed from dispenser 1105 into booster tank 1110 to form rinse liquid with heated clean water in booster tank 1110. The rinse liquid is pumped by rinse pump 1333 to rinse arm 1330. The rinse arm 1330 rotates to spray rinse liquid from above and below into wash chamber 1101. After passing through wash chamber 1101, the rinse liquid flows into wash tank 1108.

[0068] Thus, the wash tank 1108 collects all liquid sprayed into the wash chamber 1101. When the liquid level in the wash tank 1108 exceeds a set threshold, the excess liquid flows into the wastewater tank 1109 as wastewater. In an example, as shown in FIG. 13 , the hydraulic system 1329 includes a wastewater recycling system that includes a drain valve 1337 and two watertight or waterproof seals 1338 and 1339 for separating wastewater from wastewater (wastewater ready to be discharged from the dishwasher 1100 down the drain). A drain pump 1334 pumps wastewater from the wastewater recycling system to the drain. When the drain pump 1334 is turned off and the drain valve 1337 is closed, wastewater flows from the wash tank 1108 into the wastewater tank 1109 and then out of the wastewater tank 1109 and towards the drain at the seal 1338. When the drain pump 1334 is turned on and the drain valve 1337 is closed, wastewater flows (is pumped) out of the wastewater tank 1109 through a path including the drain pump 1334 and to a drain at a seal 1338. When the drain valve 1337 is open, wastewater flows directly from the cleaning tank to a drain without flowing through the wastewater tank 1109 or the drain pump 1334. A heat exchange coil 1363 is located within the wastewater tank 1109. Clean water flows through the heat exchange coil 1363 and is heated by the wastewater before being sent to the cleaning tank 1109 or the booster tank 1110, while the wastewater is cooled by the clean water before being discharged to a drain. [Example]

[0069] Some non-limiting examples (Examples 1-20) of the present subject matter are provided below.

[0070] In Example 1, a dispensing device for a washing machine comprises a first portion configured to hold and dispense solid detergent and to dispense liquid detergent, and a second portion configured to hold and dispense solid rinse aid and to dispense liquid rinse aid, at least one of the first portion or the second portion comprising at least one weight sensor on a bottom inner surface, the at least one weight sensor configured to monitor the amount of remaining contents of at least one of the first portion or the second portion.

[0071] In Example 2, the subject matter of Example 1 can optionally be configured such that the at least one weight sensor is configured to detect a change in weight of the contents of at least one of the first portion or the second portion.

[0072] In Example 3, the subject matter of any one or any combination of Examples 1 or 2 can optionally be configured such that the at least one weight sensor includes four evenly spaced weight sensors.

[0073] In Example 4, the subject matter of any one or any combination of Examples 1-3 can optionally be configured to further include a display including an indication of the amount of remaining content in the first portion or the second portion.

[0074] In Example 5, the subject matter of Example 4 can optionally be configured where a light is illuminated on the display when the amount of remaining contents is below a programmable threshold.

[0075] In Example 6, the subject matter of any one or any combination of Examples 4-5 can optionally be configured such that the device activates an audible alarm when the amount of remaining contents is less than a programmable threshold.

[0076] In Example 7, the subject matter of any one or any combination of Examples 1-6 can optionally be configured such that the first portion is configured to receive a circular barrel of detergent.

[0077] In Example 8, the subject matter of any one or any combination of Examples 1-7 can optionally be configured such that the first portion is configured to receive a peanut-shaped barrel of detergent.

[0078] In Example 9, the subject matter of any one or any combination of Examples 1-8 may optionally further comprise a tray in the first portion for supporting the solid detergent.

[0079] In Example 10, the subject matter of any one or any combination of Examples 1-9 can optionally be configured such that the solid detergent comprises a compressed solid detergent.

[0080] In Example 11, the subject matter of any one or any combination of Examples 1-10 may further comprise a one-way pressure relief valve configured to prevent contents of the first and second portions from flowing into an attached water source.

[0081] In Example 12, the subject matter of any one or any combination of Examples 1-11 may further include a door magnetic switch configured to prevent flushing of the first portion and the second portion when the door of the dispensing device is open.

[0082] In Example 13, a method of making a dispensing device for a washing machine may include providing a first compartment configured to hold and dispense a solid detergent and configured to dispense a liquid detergent; providing a second compartment configured to hold and dispense a solid rinse aid and configured to dispense a liquid rinse aid; and providing at least one weight sensor on a bottom interior surface of at least one of the first compartment or the second compartment, wherein the at least one weight sensor is configured to monitor an amount of remaining contents of at least one of the first compartment or the second compartment.

[0083] In Example 14, the subject matter of Example 13 can further include providing a display for the dispensing device that includes an indication of the amount of remaining contents of the first compartment or the second compartment.

[0084] In Example 15, the subject matter of Example 14 can optionally be configured to illuminate a light on the display when the amount of remaining contents is below a programmable threshold.

[0085] In Example 16, the subject matter of any one or any combination of Examples 14-15 can optionally be configured such that the device activates an audible alarm when the amount of remaining contents is below a programmable threshold.

[0086] In Example 17, the subject matter of any one or any combination of Examples 13-16 can optionally further include providing a tray in the first compartment for supporting the solid detergent.

[0087] In Example 18, the subject matter of any one or any combination of Examples 13-17 can optionally be configured such that the solid detergent comprises a compressed solid detergent.

[0088] In Example 19, the subject matter of any one or any combination of Examples 13-18 can further include providing a one-way pressure relief valve configured to prevent contents of the first compartment and the second compartment from flowing into an attached water source.

[0089] In Example 20, the subject matter of any one or any combination of Examples 13-19 may further include providing a door magnetic switch configured to prevent flushing of the first compartment and the second compartment when the door of the dispensing device is open.

[0090] This application is intended to cover adaptations or variations of the present subject matter. It is to be understood that the above description is intended to be illustrative, and not limiting. The scope of the invention should be determined with reference to the appended claims, along with the full scope of legal equivalents to which such claims are entitled.

Claims

1. A dispensing device for a washing machine, comprising: a first portion configured to hold and dispense a solid detergent and configured to dispense a liquid detergent; a second portion configured to hold and dispense solid rinse aid and to dispense liquid rinse aid; Equipped with at least one of the first portion or the second portion includes at least one weight sensor on an inner bottom surface, the at least one weight sensor configured to monitor a remaining content amount of at least one of the first portion or the second portion.

2. The device of claim 1 , wherein the at least one weight sensor is configured to detect a change in weight of contents of at least one of the first portion or the second portion.

3. The device of claim 1 , wherein the at least one weight sensor comprises four evenly spaced weight sensors.

4. The device of claim 1 further comprising a display including an indication of the amount of remaining contents of the first portion or the second portion.

5. The device of claim 4 , wherein a light is illuminated on the display when the amount of remaining contents is below a programmable threshold.

6. The device of claim 4 , wherein the device activates an audible alarm when the amount of remaining contents is below a programmable threshold.

7. The device of claim 1 , wherein the first portion is configured to receive a circular barrel of detergent.

8. The device of claim 1 , wherein the first portion is configured to receive a peanut-shaped barrel of detergent.

9. The device of claim 1 , further comprising a tray within the first portion for supporting the solid detergent.

10. The device of claim 1 , wherein the solid detergent comprises a compressed solid detergent.

11. 10. The device of claim 1, further comprising a one-way pressure relief valve configured to prevent the contents of the first and second portions from flowing into an attached water source.

12. 10. The device of claim 1, further comprising a door magnetic switch configured to prevent flushing of the first and second portions when the door of the dispensing device is open.

13. 1. A method of making a dispensing device for a washer, the method comprising: providing a first compartment configured to hold and dispense a solid detergent and configured to dispense a liquid detergent; providing a second compartment configured to hold and dispense a solid rinse aid and configured to dispense a liquid rinse aid; providing at least one weight sensor on a bottom interior surface of at least one of the first compartment or the second compartment, the at least one weight sensor configured to monitor a remaining content amount in at least one of the first compartment or the second compartment.

14. 14. The method of claim 13, further comprising providing a display for the dispensing device that includes an indication of the remaining contents of the first compartment or the second compartment.

15. 15. The method of claim 14, wherein a light is illuminated on the display when the amount of remaining contents is below a programmable threshold.

16. 15. The method of claim 14, wherein the device activates an audible alarm when the amount of remaining contents is below a programmable threshold.

17. 14. The method of claim 13, further comprising providing a tray within the first compartment for supporting the solid detergent.

18. 14. The method of claim 13, wherein the solid detergent comprises a compacted solid detergent.

19. 14. The method of claim 13, further comprising providing a one-way pressure relief valve configured to prevent the contents of the first compartment and the second compartment from flowing into an attached water source.

20. 14. The method of claim 13, further comprising providing a door magnetic switch configured to prevent flushing of the first compartment and the second compartment when a door of the dispensing device is open.

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