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  • 专利说明
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    • 专利摘要:
    DISHWASHER. The present disclosure relates to a dishwasher that includes one or more aspects aimed at saving water, energy or material. The developed dishwashers are even able to meet the dirty demands of the items to be washed.
    公开号:BR112014014334B1
    申请号:R112014014334-0
    申请日:2012-12-12
    公开日:2021-05-25
    发明作者:Jeffrey Paul Ellingson；Wesley Mark Nelson；Andrew Michael Jensen；Kyle D. Wood；Louis Mark Holzman
    申请人:Ecolab Usa Inc；
    IPC主号:
    专利说明:

    BACKGROUND
    [0001] Dishwashers, particularly commercial dishwashers, have to effectively clean a variety of items such as pots and pans, glasses, plates, bowls, and utensils. These items include a variety of soils, including protein, fat, starch, sugar, and coffee and tea stains, which can be difficult to remove. Sometimes these dirts can be burned or hardened, or otherwise thermally degraded. Other times dirt may have been allowed to remain on the surface for a period of time, making it more difficult to remove. Dishwashers remove dirt by using strong detergents, high temperatures, disinfectants, or mechanical action of copious amounts of water. It is in relation to this background the present disclosure is made. SUMMARY
    [0002] The present disclosure relates to a dishwasher that includes one or more aspects aimed at saving water, energy or material. The dishwashers revealed are even able to meet the dirt demands of the items to be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS
    [0003] Figures 1-A to 1-D show schematic diagrams for fluid movement in the dishwasher.
    [0004] Figures 2-A to 2-B show a schematic diagram of an automatic filling and unloading system and the corresponding logic.
    [0005] Figure 3 shows a schematic diagram of an intelligent automatic discharging and filling system.
    [0006] Figure 4 shows a schematic diagram of isolated paneling.
    [0007] Figure 5 shows a schematic diagram of a heat recovery system.
    [0008] Figure 6 shows a schematic diagram of a refrigerant reinforced heat recovery system.
    [0009] Figure 7 shows a schematic diagram of a dual stage refrigerant reinforced heat recovery system.
    [0010] Figure 8 shows a schematic diagram of a recirculated fluid accumulator.
    [0011] Figure 9 shows a schematic diagram of a recirculated steam heat recovery and condensing system.
    [0012] Figures 10-A and 10-B show schematic diagrams of alternative methods for fluid movement in the dishwasher.
    [0013] Figures 11-A and 11-B show schematic diagrams of an RFID tag inserted into a dinnerware shelf.
    [0014] According to common practice, the various aspects described are not drawn to scale, but are drawn to emphasize specific aspects relevant to the disclosure. Reference characters indicate similar aspects in all the various figures. DETAILED DESCRIPTION
    [0015] The present disclosure relates to a dishwasher that includes one or more aspects aimed at saving water, energy or material while meeting the dirt demands of the articles to be cleaned.
    [0016] Examples of water savings include using less water in the overall dishwasher cycle, reusing water or recycling water. Examples of energy savings include using less energy to heat water, and capturing heat and using the heat for other purposes. Examples of material savings include using less chemistry to clean items or using less metal in the overall dishwasher installation. These will now be discussed in more detail as they refer to specific aspects of the dishwasher. Water economy
    [0017] Dishwashers use copious amounts of water to wash dishes. A typical penthouse style or institutional door style dishwasher uses approximately 3.63 liters to approximately 5.45 liters of water per cycle. A typical restaurant uses approximately 25 to approximately 350 cycles per day. Which means that a restaurant uses approximately 90 to approximately 1,909 liters of water a day to wash dishes, pots and pans, glasses and utensils. The revealed dishwasher includes multiple aspects to reduce the amount of water used without sacrificing washing efficiency. Final pumped rinse
    [0018] In some embodiments, the dishwasher may use a final pumped rinse to save water. In this mode, the pump can draw rinse water from a source such as the final new rinse water accumulation tank (tank C 10 in figure 1) or the water recovered from the reinforced wash (tank B 6 in figure 1), also called the energy rinse tank. The tank can be selectable by utilizing a multi-position valve 20 at the pump 22 inlet. The pump can also discharge water to any or all of the wash arms, final rinse arms, or power rinse arms through a valve of multiple positions. This saves water by reusing water that is already in one of the dishwasher's existing tanks and eliminates or reduces the need to rely on fresh water for rinsing. One challenge with using water from an existing tank is that the water in the tank likely includes other detergents and dirt from the items in the dishwasher. Any chemistry used in the final rinse must be able to overcome any problems associated with using water from shared tanks.
    [0019] Figure 1 shows generally schematic diagrams for fluid movement through a dishwasher with a washing chamber 36. Figure 1-A shows a method in which each of the three fluids is pumped through separate systems. System A includes tank A 2, spray arm A 4, and pump 14. System B includes tank B 6, spray arm B 8, and pump 16. System C includes tank C 10, spray arm. spray 12 and pump 18. Tank C is replenished with fresh water from an external source. Note that each spray arm is shown as including an upper arm and a lower arm, however it is understood that both arms may not be required or one or both arms may be replaced with fixed nozzles. System A represents the wash system, system B represents the power rinse or enhanced wash system, and System C represents the final fresh water rinse system. The benefit of the method shown in figure 1-A is that each system can be optimized for that specific fluid by pump, tank and nozzle selection. Figure 1-B shows a method in which the reinforced water (system B) and final fresh water (system C) systems are joined at the pump inlet by a actuated 3-way valve 20. This allows a single pump 22 to be used to apply the booster fluid and the final rinse fluid through a single set of spray arms 24. The benefit of this is that fewer pumps and spray arms are required. Figure 1-C shows a method in which the scrubbing (System A) and the reinforced scrubbing (system B) systems are joined at the pump inlet by an actuated 3-way valve 26. This allows a single pump 28 to be used for apply the booster fluid and flushing fluid through a single set of spray arms 30. The benefit of this is that fewer pumps and spray arms are required. Figure 1-D shows an alternative to figure 1-B in which the reinforced wash systems (system B) and final fresh water (system C) are joined at the pump outlet by a three-way valve 32. This allows for optimization pump for each application.
    [0020] In an alternative configuration, a pressurized fresh water source can be used in place of the pumped fresh water source (tank C 10 in figure 1). In this case, pressurized water can enter the system at valve 34 as seen in figure 10. Figure 10-A is identical to figure 1-A with the exception that the fresh water source is pressurized without the aid of a water pump. final rinse 18 from tank C 10 and is controlled by the positioning of an automatically operated valve 34 as opposed to starting and starting the rinse pump 18. Figure 10-B is identical to figure 1-C with the exception that the Fresh water source is pressurized without the aid of a final rinse pump 18 and is controlled by positioning an automatically operated valve 34 as opposed to starting and stopping the rinse pump 18. Intelligent and automated unloading and filling
    [0021] In some embodiments, the dishwasher may incorporate an automated tank filling and discharge which could be incorporated into both or any of the dishwasher fluid tanks. This aspect automatically completely or partially drains and fills a volume of water from the dishwasher, and is shown in figure 2-A. the dishwasher can automatically drain and fill the machine in response to a change in the wash tank. Such a change could include the wash tank becoming too dirty, which could be determined by completing a predetermined number of wash cycles or in real time by a sensor such as a turbidity sensor 42 that effectively measures the tank turbidity and coordinates with controller 38 to open and close valves 44 to drain tanks 2 and 6. This saves a substantial amount of water and chemistry by not prematurely draining the tank before it gets dirty. This also ensures that the concentration of food dirt does not become so great that the dishwasher's rinsing system cannot properly rinse the utensils. The discharge and fill process automatically can be controlled using drain and fill valves with a 40 level sensor.
    [0022] Figure 2-B shows an example of the logic that dishwasher controller 38 can use to drain and refill dishwasher tanks 2 or 6 in response to feedback from turbidity sensors 42 Controller 38 receives feedback on fluid levels in tanks 2 and 6 from level sensors 40 (shown at 502). Controller 38 optionally receives feedback on the turbidity of tanks 2 and 6 from turbidity sensors 42 (shown at 504). Finally, the controller can optionally include a count to determine the number of shelves washed since the last drain event (shown at 506).
    [0023] In some embodiments, the shelf count simply counts the number of shelves that pass through the machine. In some embodiments, the shelf count is an intelligent shelf count that, together with a shelf identification system, counts the number and type of shelf and uses a weighted algorithm to determine when to drain and fill the machine after a certain number of shelf type go through the machine. For example, casseroles and pans are typically dirtier than cups. Thus, ten racks of casseroles and pans would be more messy than 10 racks of cups. A weighted shelf counting system would account for the dirt load typically associated with certain shelves. An exemplary algorithm includes the following: unload and fill the machine when ((shelf type A)*X) + ((shelf type B)*Y) + ((shelf type C)*Z) = default, where X, Y, and Z are values designed to give more weight to casserole and pan racks, less weight to bowl plate racks, less weight to utensil racks, and less weight to glassware racks. A greater or lesser number of shelves can be added to the algorithm to accommodate additional shelf types or fewer shelf types.
    [0024] The controller takes inputs 502, 504 and 506 and determines whether the turbidity measurement (508) or the shelf count measurement (510) has reached a predetermined value. The predetermined values would be programmed into controller 38 so that the controller would know how many shelves to wash before draining and refilling the tank or tanks. Similarly, controller 38 would be programmed to know how high the turbidity measurement can go before draining and refilling the tank or tanks. After the turbidity measurement or the shelf count reaches the predetermined value, the controller 38 would trigger the drain valve 44 on the tank or tanks to partially or fully drain them (shown at 512) and then refill to the desired level (514 ) as determined by level sensors 40.
    [0025] The intelligent flushing and filling system is shown in figure 3. The dishwasher controller 38 is programmed to adjust how often the dishwasher drains and refills in response to the use of the dishwasher. For example, during periods of high usage, the machine would be scheduled to drain and refill more frequently and during periods of low usage, the machine would be scheduled to drain and refill less frequently. “Usage” can be determined by counting wash cycles. “Usage” can also be determined by considering the contents of the dish racks 46. For example, restaurants with more casseroles and pans in the morning when preparing food for the day. Dishwasher controller 38 can be programmed to identify those 46 shelves as “casserole and pan” shelves and draining and refilling the dishwasher more often than if the same number of cup racks go through the machine.The fact of how the dishwasher determines the contents The shelf space is discussed in more detail below in US Patent Nos. 7,437,213 and 6,463,940, which are hereby incorporated by reference. Stated differently, the dishwasher could be programmed to unload and fill after 10 shelves of casseroles and pans, 100 racks of plates, 400 racks of cups, or some logical combination of rack totals. relatively high ratio of casseroles and pans versus plates, cups or utensils. Integrated water conditioner
    [0026] In some systems, the dishwasher may incorporate an integrated water conditioning system. The water conditioning that is built into the dishwasher avoids the need for an extreme external water conditioning system. And since the integrated system is only associated with the dishwasher, the only demands on the system are those of the dishwasher, not the rest of the water used in the kitchen or outbuilding. Integrating the water conditioning system into the dishwasher has additional benefits: water quality can be observed and analyzed by the machine, and adjustments to the conditioning level can be made. Traditional water treatment systems employ open loop control schemes. Water is treated at a predetermined rate, and regardless of usage, efficiency or performance, the treatment level remains constant. Technologies such as conductivity probes can be used to monitor the hardness of treated water; this can provide closed-loop feedback to the system allowing real-time adjustments to the water treatment level to maintain desired results. This can lead to significant improvements in both water conditioning effectiveness and efficiency. In the scenario where the dishwasher is in a low volume or storage state, the water treatment level can be reduced or disabled to match the lower needs of the machine. Similarly, if the machine is being subjected to a high volume scenario, the water treatment level can be increased to maintain valuable results. The treated water condition can also be used by the intelligent controller to adjust machine parameters and running chemistry. The amount of chemical used can be increased or decreased to suit the incoming water condition. Similarly, various machine control parameters can be adjusted to aid overall performance based on water condition. For example, if the water has a higher hardness level than expected, the wash and/or rinse cycle times can be adjusted in real time. All of these real-time tuning scenarios allow the machine to maintain optimal results regardless of the water condition. Various integrated water conditioning systems can be used. In some embodiments, the integrated water treatment system is an onboard water softener. In some embodiments, the integrated water treatment system is a capacitive deionization system as described in US 2012/0138470, US 2012/0125776, US 2012/0217170 and US 2012/0103818 patent applications. In some embodiments, the integrated water treatment system is an onboard reverse osmosis system. In some embodiments, the integrated water treatment system utilizes an acid regenerated ion exchange resin, such as those described in patent applications entitled Acid Regeneration of Ion Exchange resins for Industrial applications, with Attorney dossier number 2991USU1. and Integrated Acid Regeneration of Ion Exchange Resins for Industrial Applications, with Attorney dossier number 2991USU2, both filed simultaneously with the present.
    [0027] For every type of shelf, a specific washing sequence can be programmed in the dishwasher controller. These washing sequences can adjust the amount of chemistry used (acid detergents, alkaline detergents, rinsing aids, etc.) or the machine cycles themselves. For example, an acid cycle can be run before an alkaline cycle for a specific type of food grime for best results. Another option toggles the detergent's pH level repeatedly to remove a specific type of dirt. An example of this type of dirt would be coffee or starch stains. The cups benefit from a pre-rinse application of the acid product to neutralize any alkalinity from the wash cycle. They also benefit from an extended rinse cycle with additional rinse aid. In some embodiments, the dishwasher controller can detect whether a shelf has been washed with a full cycle or not. If the cycle is determined to be stopped for a given shelf (based on the position of the door switch and the shelf not being identified in the dishwasher) and is not restarted or completed for that shelf, an indicator may alert the operator of the incomplete washing sequence and suggests that the shelf be washed again. Statistics on the number of incomplete wash cycles can be collected and compiled into a report to provide an overall dishwasher “success rate” and help identify causes of incomplete wash cycles. Shelving
    [0028] A concept that is related to the concept of complete cycles is the concept of rewashing shelves or articles. In some embodiments, the dishwasher can determine the number of types of items that are rewashed based on the amount of time that has elapsed between a specific rack of items exiting and reentering the machine. Each shelf may be able to communicate not only the shelf type (ie, casserole and pan, cups, plates, etc.) but also a unique shelf identifier such as a serial number. If the amount of time from the end of a successful wash cycle for a given shelf to the start of the wash cycle for that exact shelf is less than the amount of time it would take to empty and refill the shelf, it can be flagged like a washed shelf again. This time can be between 10 seconds and 2 minutes. The time used for the alarm would benefit from the adjustability so it can be customized for the specific operation of the installation site. A report can be generated with wash information again and used in various ways such as operator training, machine maintenance, chemistry adjustments and chemistry selection. In addition, if a shelf is flagged it can be re-inserted into the dishwasher and the machine can be reprogrammed to change the cleaning cycle to address stubborn dirt that has forced rewash. Energy saving
    [0029] Dishwashers use a considerable amount of energy between the electricity required to run the machine and the energy required to heat the water used in the machine. Elevated temperatures are used in dishwashers to remove dirt and disinfect. Exemplary temperatures used in dishwashers include wash water 65.55-73.88°C and rinse water from 73.88-82.22°C for disinfection machines at hot water temperature and wash water temperatures and 48.88-60°C bleed for chemical disinfection machines. In a typical dishwasher process, most of the energy in hot water is lost, as steam, or drained into the drain when the dishwasher tank drains or overflows.
    [0030] Some of the water saving aspects described above are also energy saving. For example, by draining and refilling a dishwasher tank less frequently, less water needs to be heated. Creating smarter dishwashers with less frequent incomplete cycles or rewashing shelves ultimately use less water, and therefore less hot water. Specific energy saving aspects will now be described. Insulated Paneling
    [0031] In some embodiments, the dishwasher includes insulated paneling on the outside of the machine. Insulation helps with noise reduction as well as heat loss from the machine. Decreasing the rate of heat loss from the dishwasher in turn decreases the frequency that any (any) heater(s) in the dishwasher need to be used to maintain the temperature of the water in the machine. An example of insulated paneling is shown in figure 4. Specifically, figure 4 shows a dishwasher similar to the one in figure 2. The arrows in figure 4 indicate the flow of heat across a surface. For example, a double-sided arrow such as the one shown around controller 38 indicates a relatively high thermal conductivity threshold that encourages heat transfer. This type of surface can be solid or perforated and is recommended for use when heat transfer between two adjacent materials is desirable. Examples of materials with high thermal conductivity include stainless steel (10-20 gauge), carbon steel, iron, nickel, brass, silver, copper, and combinations or alloys of these. These materials could also be covered with a coating such as stainless steel over aluminum. In contrast, a single-sided arrow such as the one shown around wash chamber 36 and around tank A 2 and tank B 6 represents a relatively low thermal conductivity threshold, which discourages heat transfer. This will minimize heat loss to both the surrounding dishwasher environment and any dishwasher components that are heat sensitive. Examples of materials with low thermal conductivity include a certain thickness of foam or coated fiberglass insulation in stainless steel (10-20 gauge), porcelain, nylon, polymers such as PTFE, PVC, HDPE, and polystyrene, fiberglass, air and combinations of these. An exemplary combination of these materials includes the use of a material with an inner chamber filled with air. This would decrease overall weight, thermal conductivity and cost. Another exemplary combination is the use of an open or closed cell structure that is incorporated with air or other gases directly into the material. Figure 4 shows that heat can be contained in washing chamber 36 using materials with low thermal conductivity along the exterior of the machine and while allowing materials with high thermal conductivity in the confines of the dishwasher. Figure 4 also shows that high thermal conductive materials are suitable for components that are sensitive to heat such as electronic components like controller 38. heat recovery system
    [0032] In some embodiments, the dishwasher is designed to reduce the amount of heat lost from the machine. Dishwashers lose heat primarily through water drained or displaced through the floor drain as well as hot water vapor discharged into the environment outside the dishwasher. Heat loss due to drained or displaced water can be minimized by reducing the dishwasher's overall water consumption. Heat loss due to hot water vapor can be minimized by capturing and condensing the steam. The revealed dishwasher helps to reduce the amount of heat lost through one of several ways.
    [0033] For example, Figure 5 shows an embodiment of a dishwasher that incorporates a single or multiple stage heat recovery system. In figure 5, warm moist air is drawn from inside the machine at outlet 100. Hot moist air can optionally also be drawn from the environment surrounding the dishwasher at 102. The air from outlet 100 and environment 102 is drawn in into a heat exchanger 108 through inlet 104. Note that inlet 104 may be a simple hole into which air is drawn, in which case the arrows in Figure 5 represent the path that steam would take to flow in. of inlet 104. Alternatively, inlet 104 could be connected to outlet 100 with a duct, or tube such that air flows directly from the outlet of machine 100 and into inlet 104. In this situation, inlet 104 could also optionally including another hole from which to draw air from environment 102. In this embodiment, inlet 104 could also include a valve that could select between drawing air from outlet 100, from environment 102, or both.
    [0034] Air can be drawn into the heat exchanger 108 by a fan 106. After being inside the heat exchanger 108, a fan 106 or convection extracts heat from the warm moist air from the machine and environment around by drawing air through the tube or shell type heat exchanger(s) 110. The heat captured in the heat exchangers 110 is then used to preheat incoming water from the fluid accumulator. 116. After heat is removed from the warm moist air coming from the machine or environment, the relatively cool, dry air is discharged into the top of the heat exchanger 108 at the vent 114. Any water that has condensed inside the exchanger of heat 108 can be drained back into the machine at drain 112. This process reduces or eliminates reliance on traditional heaters. A booster heater 120 can be incorporated into the dishwasher to supplement incoming water heating as needed.
    [0035] In some embodiments, the dishwasher uses a refrigerant-enhanced heat recovery process. Figure 6 shows a refrigerant reinforced heat recovery process that uses a single step. Figure 7 shows a refrigerant reinforced heat recovery process using a multi-step process with at least one stage being reinforced by refrigerant.
    [0036] Figure 6 shows a dishwasher that collects warm moist air from the interior of the dishwasher at outlet 100 and optionally from the environment surrounding the dishwasher at 102. The warm moist air is collected and piped to an inlet 104, which sends air into a heat exchanger 108. The heat exchanger 108 may include a fan 106 to help collect air and direct it through the heat exchanger coils 110. As in Figure 5, inlet 104 may be a simple hole into which air is drawn, in which case the arrows in Figure 6 represent the path that steam would take to flow into inlet 104. Alternatively, inlet 104 could be connected to the outlet 100 with a duct, or tube such that air flows directly from the outlet of the machine 100 and into the inlet 104. In this situation, the inlet 104 could also optionally include another hole from which to draw air to leave from ambient 102. In this embodiment, inlet 104 could also include a valve that could select between drawing air from outlet 100, from ambient 102, or both.
    [0037] After the heat has been removed from the air of 100 and 102, the cool dry air is sent over the discharge 114 and the condensed, cooled water is drained back into the dishwasher at drain 112. In the figure 6, coils 110, compressor 122, coils 128, and expansion valve 124 form a good heat bath where coils 110 and 128 are filled with Freon. In use, heat from the dishwasher steam is removed and the steam is transferred to the Freon inside the coils 110. This heat is moved over the condenser coils 128 where it is pulled out and used to heat fluid to from fluid accumulator 132. Water entering from fluid supply 118 flows into fluid accumulator 132. Water from fluid accumulator 132 is pumped into condenser 126 where it draws heat out of coils 128 before being pumped back into fluid accumulator 132. The water heated in fluid accumulator 132 is then pumped by pump 18 to an optional booster heater 120 before being used in the machine. In some embodiments, heat from the heat pump system is capable of heating the water in fluid accumulator 132 upwards to 37.77°C. In some embodiments, heat from the heat pump system is capable of heating the water in fluid accumulator 132 by -9.44°C, -1.11°C or 7.22°C.
    [0038] Figure 7 shows a dishwasher that collects warm moist air from inside the dishwasher at outlet 100 and optionally from the environment surrounding the dishwasher at 102. The warm moist air is collected and piped to an inlet 104, which sends air into a heat exchanger 108. The heat exchanger 108 may include a fan 106 to help collect air and direct it through the heat exchanger coils 110. As with Figures 5 and 6, the inlet 104 may be a simple hole into which air is drawn, in which case the arrows in Figure 7 represent the path that steam would follow to flow into the inlet 104. Alternatively, the inlet 104 could be connected to outlet 100 with a duct, or tube such that air flows directly from the outlet of the machine 100 and into the inlet 104. In this situation, the inlet 104 could also optionally include another hole from which suck air from environment 102 in this embodiment, inlet 104 could also include a valve that could select between drawing air from outlet 100, from environment 102, or both.
    [0039] After the heat has been removed from the air of 100 and 102, the air from the heat exchanger 108 is sent up to the discharge 114 and the cooled, condensed water is drained back into the dishwasher in the drain 112. Air sent up from exhaust 114 is collected at inlet 134 and sent through another heat exchanger 138. As with the first heat exchanger, inlet 134 can be a simple hole into which air is drawn, in which case the arrows from outlet 114 to inlet 134 represent the path that steam would take to flow into inlet 134. Alternatively, inlet 134 could be connected to outlet 114 with a duct or tube such that air flows directly from the discharge 114 to inlet 134. Heat exchanger 138 may also include a fan 136 to assist with collecting air and moving air through coils 140. In Figure 7, coils 140, compressor 122, coils 158, and expansion valve 154 form a pump d and heat where coils 140 and 158 are filled with Freon. In use, heat from dishwasher steam is removed from the steam and transferred to the Freon within coils 140. This heat is moved to condenser coils 148 where it is pulled out and used to heat fluid to from fluid accumulator 132. Water entering from fluid supply 118 flows into fluid accumulator 132. Water from fluid accumulator 132 is pumped into condenser 156 where it draws heat out of coils 158 before being pumped back into fluid accumulator 132. The water heated in fluid accumulator 132 is then pumped by pump 18 to an optional booster heater 120 before being used in the machine. In some embodiments, heat from the heat pump system is capable of heating the water in fluid accumulator 132 to 37.77°C. In some embodiments, heat from the heat pump system is capable of heating the water in fluid accumulator 132 by -9.44°C, -1.11°C or 7.22°C.
    [0040] After additional heat is removed from the air in heat exchanger 138 the cool dry air is sent out of discharge 142 and any additional condensed water is allowed to drain back into the dishwasher via drain 150.
    [0041] Figure 8 shows a more detailed view of the fluid accumulator 132. Cold water enters the fluid accumulator 132 from the fluid supply 118. Water in the fluid accumulator 132 is gradually heated by recirculating the fluid in the fluid accumulator 132 through coils in condenser 126 and/or heat exchanger 108 through recirculation pump 130. Optional baffles 300 in fluid accumulator 132 help maintain a temperature gradient across fluid accumulator 132 so that cold water the from the fluid supply 118 is at least partially separated from the warmer water that has been recirculated through the condenser 126 and optionally heat exchanger 108. This also allows the warmer recirculated water to be closer to the outlet 302 that supplies the washing chamber. 36. The water leaving fluid accumulator 132 is pumped using fluid pump 18 which transports the water through an optional booster heater 120 and onto arms 12 in wash chamber 36.
    [0042] There are several advantages to using a heat recovery system. For example, the heat exchange capacity of the heat recovery system can be specified and matched to the expected heat load of the dishwasher and potentially exceeded allowing for recovery of different heat loads from the dishwasher. This is beneficial in institutional kitchens that are often hot and humid environments due to the continued use of ovens, stoves and hot water and would allow heat recovery from these other appliances. The heat recovery system is also beneficial because it can operate independently of the dishwasher cycle and continue to capture heat from the environment surrounding the dishwasher, even if the dishwasher is not working or is generating little to no steam. The heat recovery system is also beneficial because it can be used with both high temperature and low temperature dishwashers. It also lowers total water usage by incorporating the condensate back into the dishwasher. In addition, the heat recovery system also reduces the steam released from the dishwasher. This is beneficial in that it can eliminate the need to install material-intensive, complicated and expensive vents typically associated with dishwashers. It can also reduce heating and air conditioning costs used to compensate for the release of steam in the area around the dishwasher, which would be additional, significant energy savings.
    In some embodiments, the dishwasher may include a steam vent such as that described in US patent no. Re 40.123, incorporated herein by reference in its entirety. Solutions like the one described in the '123 patent do not recover heat but instead reduce the amount of steam released from the dishwasher. Reduced steam machines can be “ventless” and eliminate the need to install material-intensive, complicated and expensive vents above the machine.
    [0044] In an alternative configuration, the heat recovery system can be designed to discharge back into the wash chamber as shown in figure 9. This is desirable because it allows the steam to make multiple passes through the heat exchanger, which means that any air discharged out of the machine is additionally drier and cooler. Figure 9 shows a dishwasher with a washing chamber 36. The washing chamber 36 includes one or more spray arms 200 that emit a spray 202. The dishwasher includes doors 204 and discharges 206. Dishwasher also includes a drain 208, a wash reservoir 210, and a heating unit 212, which can be electric. The dishwasher also includes a booster heater 214. During operation, hot wet steam exits the washing chamber 36 through vent 222, where it enters heat exchanger 216. Heat exchanger 216 includes coils 218. , hot passes over coils 218, which remove heat from the steam, causing the water to condense and the water and cooled air to drain back into the wash chamber 36 through drain 220. Drain 220 may optionally include a fan 228 to assist in displacing air from heat exchanger 216 back into wash chamber 36. Fresh water from fresh water supply 226 is pumped through flush valve 224 and into the interior of coils 218 where is heated. The water exiting coils 218 may optionally pass through a booster heater 214 before being pumped back into wash chamber 36 and arms 200.
    [0045] This method has two distinct benefits: decreased drying times for items and decreased heat loss from the dishwasher. Decreased drying times are triggered by decreased steam condensation on the articles in the wash chamber due to the discharge of warm, relatively dry air back into the machine as well as the physical force of air acting on the articles to dislodge or migrate water out of articles. To shorten drying times of articles (as compared to any equivalent machine without heat recovery/steam condensation), the temperature of the articles must be higher than the mist point of the washing chamber to prevent the formation of condensation on the articles. . This recirculated design will remove vapor from the chamber air thereby lowering the cloud point to prevent condensation on the surfaces of the articles especially as the articles immediately begin to cool with the opening of the door. To decrease heat loss from the dishwasher, chamber air is recirculated through the heat exchanger and back into the machine to prevent loss of sensitive and latent heat to the environment surrounding the dishwasher. which may not be captured in a single pass through the heat exchanger. In other words, this recirculation of chamber air through the heat exchanger and back into the chamber allows the system to capture heat from the air in multiple passes through the heat exchanger in a washing machine cycle. single crockery. Additionally, the heat exchanger design may not be able to remove enough sensible heat from the chamber air to lower the chamber air temperature below the temperature of the air surrounding the dishwasher. This means that more heat will be preserved in the dishwasher if make-up air is supplied back into the washing chamber by recirculated air as opposed to the cooler air surrounding the dishwasher. If cooler ambient air were sucked into the machine, it would remove energy from machine components, most notably from machine metal surfaces that come in contact with rinse and wash water. In this scenario, the wash and rinse water would then lose energy to the metal surfaces of the machine and pull more overall energy from the machine power source. washing time
    [0046] In some embodiments, the dishwasher can be configured to alert the operator to the optimal time for washing subsequent shelves or provide a historical average on how well the operator is serving that optimal time. Much like a hybrid car graphically alerts the operator to wash subsequent shelves within a certain time frame. One method of doing this would be for the dishwasher or controller to include a timer, where the timer starts counting down or up from some predetermined time when the dishwasher cycle starts or ends. Starting another wash cycle would reset the timer. The purpose of the timer would be to encourage the operator to start another shelf at a specific time frame in relation to the dishwasher cycle. Doing so would reduce energy costs by ensuring that the dishwasher is using its cheapest source of heat and minimizing downtime where available heat is not being used for washing dishes. Another graphical output could be a red, yellow, or green indicator to indicate historical efficiency averages where red would be bad, yellow would be best, and green would be best. In this mode, more cycles done before the timer expires would improve a historical average from red (bad) to yellow (best) to green (best). An additional benefit of this technology would be maximized machine productivity as well as reduced labor time required to complete article washing. Instead of or in addition to graphically showing this on the dishwasher or dishwasher controller, the information could be recorded and included in a report. The report could be given to a client or used for training. In addition, the dishwasher could be programmed to emit an audible noise when the timer starts, when the timer is about to run out, or when the timer ends, to alert an operator in the area of the dishwasher that the previous cycle has been completed and the next dishwasher cycle should start. Material saving
    [0047] In addition to water and energy, dishwashers require large amounts of other materials with two significant examples being the materials used to make the dishwasher effective and the various chemical compositions used in the dishwasher during a cycle . Reducing or extending the life of the materials used to make the dishwasher is important for several reasons. For example, metal raw material prices are increasing, making metal items more expensive. In addition, after the dishwasher has completed its useful life, materials that cannot be cost-effectively reused or recycled are underused for landfills. And the various components of dishwashers can break or need to be repaired or replaced over time. Simplifying machine design simplifies machine repair and maintenance.
    [0048] The chemical compositions used in the dishwasher are critical to obtain clean, shiny and stain-free dishes, saucepans and pans, utensils and glasses. Dirty dishes, pots and pans, utensils and glasses can have serious health consequences and negatively affect the consumer's perception of a restaurant. If a restaurant doesn't see the results they're getting, the first place they should look is chemistry, not water or the machine. Therefore, it is important that the chemistry used in the dishwasher is able to overcome any changes and variations that occur in the volume, temperature and quality of water, the design of the dishwasher and any other variables in the dishwasher process. With this in mind, the tendency may be to over-use the amount of chemical compositions and rely on the strongest chemicals available. The present dish washer disclosed strategically utilizes chemical compositions in a way that uses less chemistry yet still cleans items.
    [0049] Items that are cleaned in a dishwasher experience different types of dirt. For example, casseroles and pans are soiled with large amounts of starch, sugar, protein, and greasy dirt. Conversely, cups are not typically heavily soiled, but have dirt that is difficult to remove such as lipstick, coffee and tea stains. In some embodiments, the dishwasher uses dishwasher shelves with unique identifiers to alert the washing machine of the item on the shelf. After the dishwasher has identified the type of item on the shelf, it can modify the dishwasher cycle in a mode that selects the various cycles, times, temperatures, and compositions that need to clean that item without overusing anything to that specific article. For example, operating a wash cycle with chemical compositions that are effective in cleaning pots and pans would likely be too chemical for a shelf that is full of cups. Shelf identification allows a dishwasher operator to use the correct type and concentration of chemical for the item to be cleaned. And by not using excessive chemistry, the operator can use less chemistry overall while still seeing the expected cleaning performance results. An exemplary shelf identification system is described in US patents nos. 7,437,213 and 6,463,940, which are incorporated by reference herein in their entirety.
    [0050] A shelf identification system could be realized through the use of a Radio Frequency Identification (RFID) tag as discussed in 7,437,213 and 6,463,940. One modality of this type of RFID shelf identification system could make use of disk-shaped RFID tags encased in a PPS/epoxy or plastic strip. These tags are designed to withstand water, chemical and temperature environments in dishwashers and are well suited for use in a dishwasher. More specifically, tags with low frequency (LF) eg between 125 KHz or 148 KHz, or preferably high frequency (HF) eg 13.56 MHz and above operating frequencies can be used for these applications. Some examples of these tags are available from Texas Instruments, HID Global and SmartTrac.
    [0051] These RFID tags can be integrated into the dishwasher shelf in many ways. They can be physically attached to the shelf using a fastener, they can be molded directly to the shelf, or they can be attached to the shelf with a machined or molded bracket or clamp. They can be located anywhere on the shelf, but preferably they will be located along the outer edge of the shelf, so they do not interfere with the spray of washing-up water. Preferably the mounting aspect allows the RFID tag to be attached to both new and pre-existing shelves. One method of doing this is with an injection molded holder that is designed to hold the RFID tag in a specific position on the shelf, and can be inserted into many types of shelves. A particularly preferred location for the RFID tag is in a horizontal location near the bottom of the shelf, in the corner of the shelf. This is a location that places the tag in a compatible location, which can be read through an antenna located just below the shelf guide in the dishwasher. The size of tags for horizontal use on the corner of shelves must not be too large or water spray will be blocked. Preferred tags are between 10-30 mm, or 1519 mm in diameter. Figures 11-A and 11-B show an example of an RFID tag 400 inserted into a clip 402 which is then inserted into a shelf 404.
    [0052] There are several ways in which it would be possible to attach the tag holder to the cymbal shelf, such as a fastener, a screw, a plastic push rod, a circular protrusion that would fit into a hole in the shelf, a small horizontal rib that would fasten in a slit-matched look on the shelf, or using a modified clip during shelf molding, or the shelf may need to be retrofitted.
    [0053] The RFID reader electronics and reader antenna are integrated into the dishwasher to read the shelf ID inserted into the machine. In order to select the correct dishwasher and chemical cycle characteristics to use for a shelf, it is helpful to have the shelf identification read before or too early during the dishwasher wash cycle. The shelf RFID tag can be read outside the dishwasher, or preferably inside the dishwasher, to avoid reading tags on other shelves that could be in close proximity to the reader antenna outside the dishwasher . Also, it is preferable to locate the antenna below where the shelf is located in the dishwasher. If the antenna is placed horizontally, it can read longer distances with an RFID tag placed horizontally on the shelf. It is preferable to read the tag while the shelf is being inserted into the dishwasher, rather than reading it after it is fully inserted.
    [0054] The identification of the type of dishware shelf can help to configure the process used to wash the items in which specific dishware shelf, can create trends and historical data on problems encountered during the washing process, the general operation of the machine ( for example, how often it drains), and the type of items washed during specific times and days of the week, and can help create reports to improve control of a dishwashing facility. Selected Chemistry
    [0055] In some embodiments, the disclosed dishwasher uses combinations of chemical compositions to obtain improved cleaning results. An example of such a combination is the use of chemical compositions with opposite pH values. Exemplary combinations include using alkaline and acidic compositions in alternating alkaline-acid-alkaline or acid-alkaline-acid sequences. The chemical compositions could be dishwasher pre-sauces, detergents, rinsing aids and the like. The pH of alkaline compositions can range from approximately 7 to approximately 14, from approximately 9 to approximately 13, or from approximately 10 to approximately 12. The pH of the acidic composition may range from approximately 0 to approximately 7, from approximately 1 to approximately 5, or from about 2 to about 4. When using combinations of chemical compositions, it may be desirable to apply the compositions in certain ways. For example, in some embodiments, the acidic composition can be applied through the rinse arm of the dishwasher, through spray nozzles mounted on the top, bottom and top, or the bottom of the dishwasher, through a separate arm (such as a secondary rinse arm) from the dishwasher, through nozzles in the rinse arm, or a combination of these. The acidic composition can be metered into the dishwasher's water holding tank, or it can be injected into the flowing water stream. Additional embodiments using alkaline and acidic compositions are described in US patents nos. 7,942,980 and 8,092,613, the disclosures of which are incorporated by reference herein in their entirety. Removal of lime
    [0056] In some embodiments, the dishwasher may incorporate an automatic or intelligent deliming cycle to periodically remove lime scale from walls and components within the dishwasher and dishwasher components. Traditional dishwashers have lime removed by pouring lime-removal chemical into the machine wash tank and operating the wash pump for a specified duration. This process does not allow the deliming chemical to circulate through the dishwasher rinse system as there are no provisions for injecting the deliming chemical into the fresh water supply of the dishwasher and pump No water circulates through the rinse system. A possible solution to this is to inject lime-removal chemistry at the point of entry of fresh water into the dishwasher, this chemistry can be part of, or separate from, chemistry already used in normal dishwasher cycles. This injection method will ensure that all fluid-carrying surfaces of the dishwasher can have lime removed. Also, in a dishwasher with a pumped rinse system, the deliming chemistry can be injected into the water tank that stores the water for the pumped rinse. The frequency of the lime removal operation will be determined by environmental variables such as water quality. The dishwasher controller may have provisions to provide an indication that a lime removal cycle is required.
    [0057] In a dishwasher that uses multiple tanks with a diverter to control which tank the water is directed to, it would be possible to use a water solution with appropriate chemistry to remove residual lime, i.e., pumped into a tank to remove lime in the other tank. This would be done by operating the pump connected to the tank with the deliming chemistry while using the diverter to redirect the water to the other tank. After enough water with lime removal chemistry has been guided into the other tank, it would be possible to use the pump connected to the other tank to pump water with lime removal chemistry through the piping and rinse arms of that other tank, resulting in withdrawal of lime from the surfaces of this piping and rinse arms, as well as removing lime from this second tank. The Dishwasher Controller
    [0058] In some embodiments, the dishwasher or dishwasher controller is programmed to select cycle parameters based on the type of item to be washed. Cycle parameters could include cycle time, cycle sequence, water temperature, chemical composition sequence, chemical composition concentration, and the like. Selecting dishwasher parameters to match the item being washed can result in using less water, energy and material (chemistry). In some embodiments, the dishwasher or dishwasher controller can be programmed to select cycle parameters that are more difficult to change in real time such as water temperature, or the detergent concentration of the wash tank. Some parameters like cycle time are easy to change shelf to shelf. However, water temperature can be difficult to change shelf to shelf due to the time required for the water to cool or heat. Similarly, changing the washing tank detergent concentration is difficult to change in real time shelf to shelf without discharging and refilling the tank for each shelf. An alternative to real-time tuning is to select dishwasher parameters that reflect the dirt most likely to be encountered by the dishwasher. The “most likely dirt” can be determined by the time of day, day of the week, day of the month, day of the year, and can be determined by the nature of the remainder or location. For example, early in the day, restaurants are preparing antipasti for lunch and dinner. During this time of day, a dishwasher is more likely to see casseroles and pans. Therefore, during the hours of 4:00 am and 9:00 am, the dishwasher can be programmed to wash pots and pans, which can mean a higher concentration of detergent in the wash tank, higher temperatures of water and longer dishwasher cycles. Later in the day, for example, during lunch and dinner hours, the dishwasher will likely see plates and bowls and could be programmed to have wash temperatures, rinse temperatures, and detergent concentrations that match the wash of more dishes. And at the end of the day, after dinner, a restaurant can see more glasses, in which case the dishwasher can be programmed to have wash temperatures and rinse temperatures that correspond to washing glasses, and a higher concentration of a rinse aid to make sure the cups are free of stains. These parameters are exemplary only. In some embodiments, the dishwasher or controller could be programmed for the type of food mess to be found on that specific day of the week, date, or month to account for reoccurring events such as holidays. In some embodiments, if a specific set of temperatures is found to be beneficial and these temperatures are higher than the minimum required temperatures, the logic can be programmed to more broadly determine the likely times of dishwasher use and direct the higher temperatures at these times to avoid increased energy usage during idle hours. In some embodiments, the dishwasher or controller could be programmed for the type of food dirt most likely to be found in a specific location. Examples could include detergents designed to remove starch stains in an Italian restaurant, or detergents designed to remove coffee and tea stains in a coffee shop. In this example a set of pre-programmed parameters would then be used to help remove specific food soils.
    [0059] Setting the dishwasher to operate under different operating parameters based on the time of day, day of the week or other control parameters can be programmed in the dishwasher operating parameters initially or when it is configured for operation in a specific location. Alternatively, the configuration of these operating parameters could take place automatically by collecting historical data about the machine's operation obtained through the shelf identification functionality. For example, cumulative data on the number of shelves of different type of article that is washed during specific time periods during the day or weekdays could be used to automatically adjust the chemistry, cycle processes, etc., to better wash the type of article expected during that time. In this way, operating parameters could automatically adjust over time as control parameters change which could occur seasonally, for example.
    [0060] Other dishwasher functionality not directly related to single cycle operation can also be adjusted based on manually set values or automated processes. For example, automatic tank draining and refilling, complete or partial, to improve the cleanliness of the water in the tanks could be adjusted based on the type of article being washed. With the example above, if pots and pans are washed between 4:00 am and 9:00 am, more frequent tank draining and refilling processes could be used. Alternatively, this functionality could be determined by collecting historical data through shelf identification and adjustment of drain and replenish functionality based on cumulative data over time.
    [0061] In some embodiments, the dishwasher may include a casing to help protect the machine and its internal components from the environment. The dishwasher environment is subject to higher than normal ambient temperatures and humidity as well as the potential to drive water sprays downward. Regulatory standards help protect against these types of factors up to a point, but may not ensure that desired reliability is met.
    [0062] In some embodiments, the dishwasher or controller can be used to determine the optimal mix of shelf types needed by a customer based on the frequency of use of each shelf type. For example, if a dishwasher or controller determines that ten cup racks are washed for each dish rack, a recommendation can be made to adjust the number of each type of rack used in the dish space so that the customer has ten times the number of cup racks as plate racks. Similarly, similar data could be collected to estimate the number of uses of each type of article. For example, the number of shelves for a specific type of article could be counted and multiplied by the number of items on the shelf. That number could be divided by the total number of that type of article in circulation to estimate the number of uses. A customer could use that number of uses to anticipate when ordering replacements or for warranty purposes on the article. In addition, this data could be used to report to the customer and recommend process adjustment to improve the washing process; for example, if data shows that more cup racks are being washed than expected, processes could be examined to determine if racks are not being filled before washing, or if conditions are resulting in substandard wash performance , requiring cups to be washed again for proper cleaning.
    [0063] The above descriptive report, examples and data provide a complete description of the manufacture and use of the disclosed dishwasher. Since many embodiments of the disclosure can be made without departing from the spirit and scope of the invention, the invention is based on the claims.
    权利要求:
    Claims (9)
    [0001]
    1. Dishwasher CHARACTERIZED in that it comprises: a housing defining a washing chamber (36) comprising at least one spray arm (12) mounted thereto and at least one spray nozzle on the spray arm (12 ), the housing further comprising a port and an outlet (100); a water source (118); a heat recovery system comprising: a. a first flow passage (108) in fluid communication with the washing chamber (36) via the outlet (100), wherein the first flow passage (108) comprises a first end and a second end and a drain ( 112) and a fan (106), the first end positioned adjacent the outlet (100) and the second end positioned opposite the first end, wherein the fan (106) is arranged to bring moist air from within the washing chamber (36 ) and air from outside the enclosure into the first flow passage when the door is in a closed position; wherein the drain (112) is in fluid communication with the wash chamber (36) and adapted to drain condensate from the first flow passage (108) to the wash chamber (36), and wherein the first flow passage (108) further comprises an exhaust port (114) positioned at the second end; b. a second flow passage (126) extending between and in fluid communication with the water source (118) and the wash chamber (36); c. a refrigerant reinforced heat exchanger circuit comprising a closed loop circuit filled with refrigerant fluid, the circuit comprising a first coil (110) extending in the first flow passage (108) and constructed and arranged to absorb heat from the fluid in the first passage flow (108); and a second coil (128) extending in the second flow passage (126) and constructed and arranged to release heat into the fluid in the second flow passage (126), wherein the heat recovery system has a heat exchange capability. that exceeds a heat load produced by the dishwasher.
    [0002]
    2. Dishwasher according to claim 1, CHARACTERIZED by the fact that it further comprises a booster heater (120).
    [0003]
    3. Dishwasher according to claim 1, CHARACTERIZED by the fact that it further comprises a water treatment system located in the dishwasher.
    [0004]
    4. Dishwasher according to claim 1, CHARACTERIZED by the fact that it further comprises insulated panels around the washing chamber.
    [0005]
    5. Dishwasher CHARACTERIZED by the fact that it comprises:6. housing defining a washing chamber (36) comprising at least one spray arm (12) mounted thereto and at least one spray nozzle on the spray arm (12), the housing further comprising a port and an outlet (100) a water source (118); a heat recovery system comprising: a. a first flow passage (108) in fluid communication with the washing chamber (36) via the outlet (100), wherein the first flow passage (108) comprises an exhaust port (114) adapted for exhausting gases from the first flow passage (108), a drain (112) in fluid communication with the washing chamber (36) and adapted to drain condensate from the first flow passage (108) to the washing chamber (36 ) and a fan (106), wherein the fan (106) is arranged to bring moist air from inside the washing chamber (36) and/or air from outside the housing to the first flow passage (108) when the port is in the closed position; b. a second flow passage (138) in fluid communication with the first flow passage (108) via the exhaust port (114) of the first flow passage (108), the second flow passage (138) comprising a port exhaust (142) adapted for exhausting gases from the second flow passage (138) out of the dishwasher, a drain (150) in fluid communication with the washing chamber (36) and adapted to drain condensate from the second flow passage (138) to the washing chamber (36) and a fan (136), wherein the fan (136) is arranged to bring air from the first flow passage (108) to the second flow passage (138) ;ç. a third flow passage (156) in fluid communication with the water source (118) and the wash chamber (36);d. a first circuit comprising a heat exchanger coil (110) extending in the first flow passage (108) and constructed and arranged to absorb heat from the fluid in the first flow passage (108), wherein the first circuit is in fluid communication. with the external water source (118) and the washing chamber (36); e. a refrigerant reinforced heat exchanger circuit comprising a closed loop circuit filled with refrigerant fluid, the circuit comprising a first coil (140) extending in the second flow passage (138) constructed and arranged to absorb heat from the fluid in the second passage of flow passage (138) and a second coil (158) extending in the third flow passage (156) constructed and arranged to release heat into the fluid in the third flow passage (156), wherein the heat recovery system has a heat exchange capacity that exceeds a heat load taken from the washing chamber.
    [0006]
    6. Dishwasher according to claim 5, CHARACTERIZED by the fact that it further comprises a booster heater (120).
    [0007]
    7. Dishwasher according to claim 1 or 5, CHARACTERIZED by the fact that it further comprises an integrated water conditioning system.
    [0008]
    8. Dishwasher according to any one of claims 1, 5 and 7, CHARACTERIZED by the fact that the first flow passage (108) comprises an inlet port (104) between the first flow passage (108) and a dishwasher exterior.
    [0009]
    9. Dishwasher according to any one of claims 1, 5 and 7, CHARACTERIZED by the fact that the second flow passage further comprises a tank external to the heat recovery system.
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    同族专利:
    公开号 | 公开日
    US11191419B2|2021-12-07|
    BR112014014334A2|2017-06-13|
    CA2859358C|2020-03-10|
    AU2017200059B2|2019-11-21|
    CN106108823B|2020-01-10|
    US9289107B2|2016-03-22|
    CA2859358A1|2013-06-20|
    EP2865313A1|2015-04-29|
    JP6462036B2|2019-01-30|
    CA3067817A1|2013-06-20|
    US20140041695A1|2014-02-13|
    US20160367107A1|2016-12-22|
    US20190350431A1|2019-11-21|
    JP6141865B2|2017-06-07|
    EP2790561A4|2015-10-28|
    WO2013090443A1|2013-06-20|
    AU2012352338A1|2014-06-12|
    EP2790561A1|2014-10-22|
    US10314461B2|2019-06-11|
    CN104105436A|2014-10-15|
    US20160262593A1|2016-09-15|
    AU2017200059A1|2017-02-02|
    JP2015504708A|2015-02-16|
    AU2012352338B2|2016-12-15|
    CN104105436B|2016-09-14|
    AU2020201130A1|2020-03-05|
    CN106108823A|2016-11-16|
    JP2017127755A|2017-07-27|
    US10349803B2|2019-07-16|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-03| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-25| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161569930P| true| 2011-12-13|2011-12-13|
    US61/569,930|2011-12-13|
    PCT/US2012/069272|WO2013090443A1|2011-12-13|2012-12-12|Dishmachine|
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