US20130134184A1 - Liquid metering and injection system - Google Patents
Liquid metering and injection system Download PDFInfo
- Publication number
- US20130134184A1 US20130134184A1 US13/687,812 US201213687812A US2013134184A1 US 20130134184 A1 US20130134184 A1 US 20130134184A1 US 201213687812 A US201213687812 A US 201213687812A US 2013134184 A1 US2013134184 A1 US 2013134184A1
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- Prior art keywords
- cleaning solution
- dosing
- dosing tank
- tank
- weight sensor
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
- D06F39/022—Devices for adding soap or other washing agents in a liquid state
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F95/00—Laundry systems or arrangements of apparatus or machines; Mobile laundries
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/20—Washing liquid condition, e.g. turbidity
- D06F2103/22—Content of detergent or additives
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/37—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of metering of detergents or additives
Definitions
- the present invention relates to liquid metering, measuring, and dispensing, and particularly to metering and measuring liquid products for use in industrial or commercial laundry facilities.
- a flow meter may introduce errors as air enters the delivery tubes or if the supply pump connected to the flow meter generates a back pressure to the flow meter. Errors in the flow meter may result in under-delivering or over-delivering the chemicals and liquids. Under-delivering the chemicals and liquids may result in ineffective cleaning, while over-delivering may result in wasting the chemicals and liquids, and potentially damage the loads of laundry.
- the disclosure relates to a liquid metering system for a commercial or industrial laundry operation that can measure a weight of a cleaning solution that is being transferred.
- the system generally includes a dosing tank configured to receive the cleaning solution, a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank, and a discharge pump operable to pump the measured cleaning solution from the transport tank to downstream equipment.
- the disclosure relates to a metering assembly for a commercial or industrial laundry operation that can measure a weight of a cleaning solution that is being transferred.
- the metering assembly generally includes a dosing tank configured to receive the cleaning solution, and a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank.
- FIG. 1 is a perspective view of a liquid metering and injection system embodying the invention.
- FIG. 2 is a perspective view of a frame of the liquid metering and injection system of FIG. 1 .
- FIG. 3 is an enlarged perspective view of a portion of the frame of FIG. 2 .
- FIG. 4 is a perspective view of a metering assembly of the liquid metering and injection system of FIG. 1 .
- FIG. 5 is an exploded perspective view of the metering assembly of FIG. 4 .
- FIG. 6 is a perspective view of an injection cap of the metering assembly of FIG. 4 .
- FIG. 7 is a perspective view of a load cell of the metering assembly of FIG. 4 .
- FIGS. 8 a , 8 b , and 8 c are top, side, and perspective views, respectively, of a load cell bracket of the metering assembly of FIG. 4 .
- FIG. 9 is a perspective view of a load cell bracket cover of the metering assembly of FIG. 4 .
- FIG. 10 is a perspective view of a dosing tank of the metering assembly of FIG. 4 .
- FIG. 11 is a perspective view of a transport tank of the metering assembly of FIG. 4 .
- FIG. 12 is a perspective view of a transport tank lid of the metering assembly of FIG. 4 .
- FIG. 1 illustrates a liquid metering and injection system 10 .
- the system 10 includes a lower pumping cabinet 14 , an upper control cabinet 18 mounted above the pumping cabinet 14 , and a metering assembly 22 supported on one side of the pumping cabinet 14 .
- the pumping cabinet 14 houses pumps and manifolds for distributing cleaning solutions, which typically are in liquid form and include different concentrations of various chemicals and compounds for obtaining a specific cleaning goal.
- cleaning solution shall refer to any liquid pumped and distributed by the system 10 without regard to its specific composition or ultimate purpose.
- the control cabinet 18 includes electronic circuitry and control systems for controlling operation of the pumps and manifolds, and the metering assembly 22 measures specific quantities of cleaning solution for distribution to downstream equipment (not shown), such as commercial or industrial laundry equipment.
- the pumping cabinet 14 includes an upper shelf 26 and a middle shelf 30 each supporting a plurality (e.g., six as illustrated) of pumps 34 configured to pump cleaning solution. Each pump 34 is coupled to a supply tank (not shown) for a different cleaning solution and is operable to pump its respective cleaning solution to the metering assembly 22 .
- the pumping cabinet 14 also includes a lower shelf 38 that supports three additional pumps, including a first water flush pump 42 , a second water flush pump 46 , and a discharge pump 50 .
- the pumps 34 , 42 , 46 , and 50 are diaphragm pumps, chosen based at least in part upon their relatively low cost, long life, and good reliability.
- a plurality of manifolds 54 are mounted below the middle shelf 30 and to the left of the discharge pump 50 .
- the discharge pump 50 is coupled at its input to the metering assembly 22 for receiving metered amounts of cleaning solution(s) therefrom, and is coupled at its output to the manifolds 54 for controlling distribution of the metered cleaning solution(s) to the downstream commercial washing equipment.
- the pumping cabinet 14 includes a frame 58 for supporting the various components of the system 10 .
- the illustrated frame 58 includes base members 62 engaging the ground, uprights 64 extending upwardly from the base members 62 , and a plurality of cross beams 66 extending between the uprights 64 .
- the right hand side of the frame 58 includes an upper extension 68 extending outwardly from the side of the frame 58 , and a lower extension 70 below the upper extension.
- the upper and lower extensions 68 , 70 cooperate to support the metering assembly 22 .
- FIG. 3 illustrates the upper and lower extensions 68 , 70 in further detail.
- Each extension 68 , 70 is substantially U-shaped.
- the upper extension 68 includes a pair of side legs 72 extending away from the frame 58 and a base leg 74 extending between the side legs 72 .
- Each side leg 72 includes a top hole 76 substantially centered along the length of the side leg 72 , and a pair of inwardly-facing, spaced-apart, side holes 78 that face inwardly (only the side holes 78 of the rear side leg 72 are visible in FIG. 3 ).
- the base leg 74 of the upper extension 68 also includes a pair of inwardly-facing side holes 78 .
- side holes 78 and the top hole 76 may have crimps in threaded inserts.
- the upper extension 68 also includes a central support member 80 extending substantially parallel to the side legs 72 from the cross beam 66 of the frame to the base leg 74 .
- the central support member 80 is substantially centered between the side legs 72 and is coupled (e.g., by welding) to the undersides of the cross beam 66 and the base leg 74 .
- the central support member 80 includes a pair of mounting holes 82 on an underside thereof (the mounting holes 82 are showing facing upwardly in FIG. 3 to show their approximate location along the central support member 80 , but in fact face downwardly when the system 10 is properly assembled).
- the lower extension 70 is also substantially U-shaped and includes a pair of side legs 84 extending away from the frame 58 and a base leg 86 extending between the side legs 84 .
- Each side leg 84 includes a top hole 88 substantially centered along the length of the side leg 72 .
- the metering assembly 22 is configured to receive one or more cleaning solutions from the pumps 34 , measure by weight a specific amount of cleaning solution or solutions, and discharge the measured amount of cleaning solution or solutions to the discharge pump 50 .
- Some or all components of the metering assembly 22 may be made of stainless steel or ethylene tetrafluoroethylene (ETFE) coated aluminum.
- ETFE ethylene tetrafluoroethylene
- the metering assembly 22 includes a dosing cap 90 that is coupled to and supported by the upper extension 68 .
- the dosing cap 90 includes a floor 92 having formed therein a plurality of apertures 94 sized and arranged to receive nozzles and conduits that are coupled to the various pumps 34 .
- the illustrated dosing cap 90 also includes four sidewalls 96 , with two of the sidewalls 96 defining opposed load openings 98 positioned near the floor 92 . As explained below, the remaining two sidewalls 96 each define an upwardly opening slot 102 that receives a respective end 110 , 112 of a weight sensor 108 when the dosing tank is supported from the frame 58 by way of the weight sensor 108 .
- one of the sidewalls 96 defining the upwardly opening slot 102 also defines a plurality of apertures 94 formed therein sized and arranged to accommodate the various conduits and nozzles.
- Each sidewall 96 defines a pair of holes 106 along an upper edge thereof that are configured for alignment with the inwardly-facing side holes 78 in the upper extension. Fasteners (not shown) extend through the holes 106 and into the side holes 78 secure the dosing cap 90 to the upper extension 68 .
- a dosing lid 107 covers the dosing cap 90 . The dosing lid 107 fits over and is coupled to the top holes 88 provided in the side legs 84 of the upper extension 68 .
- the metering assembly 22 further includes a weight sensor or load cell 108 having a first end 110 coupled to the central support member 80 and a second end 112 that supports other portions of the metering assembly 22 .
- the first and second ends 110 , 112 of the load cell each include a pair of openings 114 for securing the load cell 108 to other components.
- the illustrated load cell 108 also includes a central sensing portion 116 that includes sensors 118 (e.g., strain gauges) configured to measure the load that is supported by the load cell 108 .
- the illustrated load cell 108 is an OMEGA® brand LCAE-25KG load cell, however those skilled in the art will readily appreciate that other types, brands, and sizes of load cells or load/force measurement devices could also be used without departing from the spirit and scope of the present invention.
- a weight sensor bracket or load cell bracket 120 ( FIGS. 8 a , 8 b , 8 c ) is coupled to the second end 112 of the load cell 108 .
- the illustrated load cell bracket 120 is a cylindrical rod and extends outwardly and away from the load cell 108 .
- the load cell bracket 120 includes a centrally-located flat 122 and central bores 124 for coupling to the second end 112 of the load cell 108 .
- Each end of the load cell bracket 120 includes an axially-aligned threaded bore 126 , and a small overhanging tab 128 .
- a pair of load cell bracket covers 129 ( FIG.
- the load cell bracket covers 129 ensure that the conduits and other components coupled to and extending from the dosing cap 90 do not contact the load cell bracket 120 , thereby eliminating a potential source of errors in the readings taken by the load cell 108 .
- the load cell bracket 120 supports a dosing tank 130 that receives and contains the cleaning solutions dispensed from the nozzles that are coupled to the dosing cap 90 .
- the dosing tank 130 includes sidewalls 132 , two of which define opposed openings 134 .
- the dosing tank 130 also includes downwardly and inwardly sloping interior walls 138 that act as a funnel and terminate at a bottom wall 142 defining a discharge opening 146 .
- the dosing tank 130 also includes a splash guard 147 therein. In other embodiments, however, the dosing tank 130 may not include the splash guard 147 .
- the ends of the load cell bracket 120 extend through and slightly beyond the opposed load openings 98 in the dosing cap 90 .
- the dosing tank 130 is moved upwardly and over the bottom portion of the dosing cap 90 , which as noted above is coupled to and supported by the upper extension 68 .
- the openings 134 in the dosing tank sidewalls 132 are then aligned with the axially-aligned threaded bores 126 of the load cell bracket 120 .
- Fasteners (not shown) are then extended through the openings 134 and threaded into the threaded bores 126 to couple the dosing tank 130 to the ends of the load cell bracket 120 .
- the overhanging tabs 128 on the ends of the load cell bracket 120 fit over the ends of the dosing tank sidewalls 132 to prevent rotation of the dosing tank 130 with respect to the load cell bracket 120 (see FIG. 4 ).
- the dosing tank 130 is sized to loosely receive the lower portion of the dosing cap 90 .
- the load cell openings 98 in the sidewalls of the dosing cap 90 are larger than the load cell bracket 120 such that the load cell bracket 120 extends through the openings 98 without contacting the load cell openings.
- the dosing tank 130 receives the dosing cap 90 and is in close proximity thereto, the dosing cap 90 is supported more or less directly and exclusively by the frame 58 , whereas the dosing tank 130 is supported from the frame 58 by way of the load cell 108 and load cell bracket 120 . Because the dosing tank 130 is supported from the second end 112 of the load cell 108 , the load cell 108 is able to measure the weight of the dosing tank 130 and any cleaning solutions dispensed into the dosing tank 130 .
- the weight sensor 108 is a load cell coupled to the load cell bracket 120 , in other embodiments other structures performing the same function as the load cell 108 disclosed herein can be used instead.
- the weight of the cleaning solution received by the dosing tank 130 may be measured by a sensor pad supporting an underside of the dosing tank 130 .
- the weight sensor 108 may include any mechanical assembly configured to measure the weight of the cleaning solution received by the dosing tank 130 .
- the weight sensor 108 may include a piezoelectric compression sensor or any other electric sensors depending on the usage requirements or preferences for the liquid metering and injection system 10 .
- the illustrated embodiment includes a single weight sensor 108 , other embodiments may include a plurality of weight sensors 108 , for example so as to reliably and accurately measure the weight of the cleaning solution.
- a valve assembly 148 is coupled to and supported by the dosing tank 130 .
- the valve assembly 148 includes an inlet 149 coupled to the discharge opening 146 and can be closed and opened to either retain and collect cleaning solution in the dosing tank 130 or to allow cleaning solution to flow out of the dosing tank 130 .
- the illustrated valve assembly 148 includes an air-operated diaphragm valve 150 that can be operated by pressurized air. Those skilled in the art will readily appreciate that other types of valves could also be used without departing from the spirit and scope of the present invention. When the valve 150 is closed, cleaning solution collects in the dosing tank 130 .
- valve 150 When the valve 150 is opened, cleaning solution flows by gravity feed out of the dosing tank 130 , through the valve assembly 148 and out a discharge tube 152 that extends downwardly from the valve 150 . Because the valve assembly 148 is supported by the dosing tank 130 , the mass of the valve assembly 148 is included in the overall load that is supported by the load cell 108 .
- the discharge tube 152 of the valve assembly 148 discharges cleaning solution into a transport tank 154 that is coupled to and supported by the lower extension 70 of the frame 58 .
- a transport tank lid 156 is also coupled to the lower extension 70 , covers the transport tank 154 , and defines an opening 158 through which the discharge tube 152 extends.
- the discharge tube 152 may include a through-pipe rubber grommet (not shown) that creates a light seal between the discharge tube 152 and the opening 158 in the transport tank lid 156 without affecting the movement of the dosing tank 130 . In this way, the dosing tank 130 and valve assembly 148 are supported substantially exclusively by the load cell 108 and the load cell bracket 120 .
- the transport tank 154 also includes downwardly and inwardly sloping interior walls 160 ( FIG. 11 ) that act as a funnel and guide cleaning solution(s) in the transport tank 154 toward a centrally located discharge opening (not shown) in the bottom of the transport tank 154 .
- a conduit 162 extends from the bottom of the transport tank 154 and is coupled to the discharge pump 50 , which pumps cleaning solution(s) from the transport tank 154 to the manifolds 54 for distribution to the downstream equipment.
- the load cell 108 supports the load cell bracket 120 , the dosing tank 130 , and the valve assembly 148 .
- the dosing cap 90 and dosing lid 107 are supported by the upper extension 68
- the transport tank 154 and transport lid 156 are supported by the lower extension 70 .
- the control system housed in the control cabinet 18 responds to operator or automated requests for dispensing a specific cleaning solution by operating the metering assembly 22 to measure the appropriate quantity of the specific cleaning solution.
- the diaphragm valve 150 is closed and the pump 34 associated with the cleaning solution is turned on. Turning on the pump 34 pumps cleaning solution through conduits in the pumping cabinet 14 to the corresponding discharge nozzle (not shown) that is coupled to the floor 92 of the dosing cap 90 . The cleaning solution is then discharged into the dosing tank 130 . Because the diaphragm valve 150 is closed, the cleaning solution begins to accumulate in the dosing tank 130 , and the load on the load cell 108 begins to increase.
- the densities of the various cleaning solutions pumped by the system 10 are pre-programmed into the control system.
- the control system is able to monitor the weight of the cleaning solution via the load readings provided by the load cell 108 , and can then convert the weight of the cleaning solution into a volume of cleaning solution that has been dispensed.
- overall cycle time of the system 10 can be reduced by constantly monitoring the load on the load cell 108 and adjusting the speed of the pump 34 on the fly. For example, at the beginning of a discharge cycle the pump 34 can be operated at maximum speed to rapidly fill the dosing tank 130 . However, as the desired quantity of cleaning solution is approached, the speed of the pump 34 can be reduced to allow the final amount of cleaning solution dispensed to be controlled more precisely.
- the pump 34 is turned off and the diaphragm valve 150 is opened.
- the cleaning solution then flows by gravity through the discharge tube 152 and into the transport tank 154 .
- the control system can continue to monitor the load on the load cell 108 and thus be able to detect when the dosing tank 130 is completely empty.
- the diaphragm valve 150 is closed and another metered dose of cleaning solution can be prepared, potentially before the previously-metered dose of cleaning solution has been pumped from the transport tank 154 by the discharge pump 50 .
- the discharge pump 50 is operated and the manifolds 54 are controlled to supply the metered and optionally pre-mixed cleaning solution(s) to the appropriate downstream equipment.
- the system 10 is advantageously configured to dispense a plurality of different cleaning solutions (e.g., twelve in the illustrated embodiment). In some circumstances, these different cleaning solutions may be dangerously reactive with one another.
- the first and second water flush pumps 42 , 46 can be used to rinse the dosing tank 130 and the transport tank 154 , respectively.
- the first water flush pump 42 is connected via conduits to the dosing cap 90 and is operable to pump rinse water into the dosing tank 130 .
- the second water flush pump 46 is connected via conduits to the transport tank 154 or transport tank lid 156 , and is operable to pump rinse water into the transport tank 154 .
- the control system can be pre-programmed to recognize potentially dangerous combinations of cleaning solutions and to rinse the dosing tank 130 and/or the transport tank 154 as needed between metering operations.
- the system 10 may also include a self-calibration feature that utilizes a float assembly mounted to the dosing cap 90 .
- the float assembly extends or can be adjusted to extend downwardly from the dosing cap 90 to sense a location of the free surface of any liquid contained within the dosing tank 130 .
- the control system can fill the dosing tank 130 with a liquid of known density (e.g., water) to a predetermined calibration level having a known volume by sensing the level of the liquid with the float assembly.
- the control system can then compare the reading of the load cell 108 with the expected reading based upon the known volume and known density of the liquid that held in the dosing tank, and can adjust the calibration level of the load cell 108 as necessary.
- the self-calibration feature may utilize an ultra sonic sensor or a sight glass instead of a float assembly.
- the system 10 may not include a self-calibration feature. For example, a known amount of liquid may be injected so as to eliminate the need for a self-calibration feature.
- the apparatus and articles of manufacture described herein are not limited in this regard.
- the system 10 is operable to meter and dispense a desired amount of cleaning solution by measuring the weight of the cleaning solution before dispensing the cleaning solution to downstream equipment.
- the system 10 includes a dosing tank 130 supported by a load cell 108 .
- the system 10 is configured to minimize possible interference with readings of the load cell 108 by supporting at least the dosing cap 90 and the transport tank 154 by separate structure, such as the upper and lower extensions 68 , 70 . Because the system 10 includes two tanks, namely the dosing tank 130 and the transport tank 154 , a first measured quantity of cleaning solution can be prepared in the dosing tank 130 and transferred to the transport tank 154 .
- a second measured quantity of cleaning solution can begin to be prepared in the now-empty dosing tank 130 , thereby reducing overall cycle time of the system.
- the two tank arrangement also allow for the pre-mixing of multiple measured quantities of cleaning solutions in the transport tank 154 .
- the system is also capable of performing self-calibration of the load cell 108 using a float assembly mounted to the dosing cap 90 .
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Abstract
A liquid metering system for a commercial or industrial laundry operation includes a dosing tank supported by a weight sensor that can measure the weight of cleaning solution transferred into the dosing tank. A valve assembly is operable to transfer the measured cleaning solution from the dosing tank to a transport tank, and a discharge pump is operable to pump the measured cleaning solution from the transport tank to downstream equipment. Measured quantities of different cleaning solutions can also be mixed in the transport tank before being delivered to downstream equipment. A control system regulates operation of the various pumps, valves, and manifolds, and monitors the readings from the weight sensor.
Description
- This claims priority to U.S. Provisional Patent Application No. 61/564,038, filed on Nov. 28, 2011, the content of which is herein fully incorporated by reference.
- The present invention relates to liquid metering, measuring, and dispensing, and particularly to metering and measuring liquid products for use in industrial or commercial laundry facilities.
- Large capacity industrial and commercial laundry facilities utilize washing machines having capacities on the order of 100 lbs. or more of laundry. Depending upon the type of laundry, different types and amounts of detergent, chemicals, and cleaning solutions are used during different stages in the washing operation. Because the sizes of washers and the sizes of individual loads of laundry can vary throughout a commercial washing facility and from load to load, it is desirable to have an automated system for dispensing the correct amount of detergent and cleaning solutions for each system and each load.
- Known systems for regulating the various chemicals and liquids used in commercial laundry facilities rely upon in-line flow meters to measure the flow rate of a given liquid through a given conduit. When the flow rate is known, the total amount of liquid dispensed by the system can be controlled by regulating the duration of the flow. Because different liquids have different viscosities and are carried by different conduits, it generally is required to have individual flow meters for each type of liquid that is to be supplied to the washing machine. As a result, each flow meter must be individually calibrated for the specific liquid being measured. Moreover, because flow meters are highly sensitive to pressure changes, cavitation, and other flow irregularities, the pumps used to initiate the flow of the liquids through the conduits must be of a type that provides a uniform and relatively consistent output flow. For example, peristaltic pumps have been successfully used in commercial laundry facilities.
- During use in commercial laundry facilities, a flow meter may introduce errors as air enters the delivery tubes or if the supply pump connected to the flow meter generates a back pressure to the flow meter. Errors in the flow meter may result in under-delivering or over-delivering the chemicals and liquids. Under-delivering the chemicals and liquids may result in ineffective cleaning, while over-delivering may result in wasting the chemicals and liquids, and potentially damage the loads of laundry.
- In an aspect the disclosure relates to a liquid metering system for a commercial or industrial laundry operation that can measure a weight of a cleaning solution that is being transferred. The system generally includes a dosing tank configured to receive the cleaning solution, a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank, and a discharge pump operable to pump the measured cleaning solution from the transport tank to downstream equipment.
- In another aspect the disclosure relates to a metering assembly for a commercial or industrial laundry operation that can measure a weight of a cleaning solution that is being transferred. The metering assembly generally includes a dosing tank configured to receive the cleaning solution, and a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank.
- Aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
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FIG. 1 is a perspective view of a liquid metering and injection system embodying the invention. -
FIG. 2 is a perspective view of a frame of the liquid metering and injection system ofFIG. 1 . -
FIG. 3 is an enlarged perspective view of a portion of the frame ofFIG. 2 . -
FIG. 4 is a perspective view of a metering assembly of the liquid metering and injection system ofFIG. 1 . -
FIG. 5 is an exploded perspective view of the metering assembly ofFIG. 4 . -
FIG. 6 is a perspective view of an injection cap of the metering assembly ofFIG. 4 . -
FIG. 7 is a perspective view of a load cell of the metering assembly ofFIG. 4 . -
FIGS. 8 a, 8 b, and 8 c are top, side, and perspective views, respectively, of a load cell bracket of the metering assembly ofFIG. 4 . -
FIG. 9 . is a perspective view of a load cell bracket cover of the metering assembly ofFIG. 4 . -
FIG. 10 is a perspective view of a dosing tank of the metering assembly ofFIG. 4 . -
FIG. 11 is a perspective view of a transport tank of the metering assembly ofFIG. 4 . -
FIG. 12 is a perspective view of a transport tank lid of the metering assembly ofFIG. 4 . - It is to be understood that the invention is not limited in its application to the details of the construction and the arrangements of components set forth in the following description or illustrated in the drawings. The present invention is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
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FIG. 1 illustrates a liquid metering andinjection system 10. Thesystem 10 includes alower pumping cabinet 14, anupper control cabinet 18 mounted above thepumping cabinet 14, and ametering assembly 22 supported on one side of thepumping cabinet 14. Thepumping cabinet 14 houses pumps and manifolds for distributing cleaning solutions, which typically are in liquid form and include different concentrations of various chemicals and compounds for obtaining a specific cleaning goal. As used herein, the term “cleaning solution” shall refer to any liquid pumped and distributed by thesystem 10 without regard to its specific composition or ultimate purpose. Thecontrol cabinet 18 includes electronic circuitry and control systems for controlling operation of the pumps and manifolds, and themetering assembly 22 measures specific quantities of cleaning solution for distribution to downstream equipment (not shown), such as commercial or industrial laundry equipment. - The
pumping cabinet 14 includes anupper shelf 26 and amiddle shelf 30 each supporting a plurality (e.g., six as illustrated) ofpumps 34 configured to pump cleaning solution. Eachpump 34 is coupled to a supply tank (not shown) for a different cleaning solution and is operable to pump its respective cleaning solution to themetering assembly 22. Thepumping cabinet 14 also includes alower shelf 38 that supports three additional pumps, including a firstwater flush pump 42, a secondwater flush pump 46, and adischarge pump 50. In the illustrated construction, thepumps manifolds 54 are mounted below themiddle shelf 30 and to the left of thedischarge pump 50. Thedischarge pump 50 is coupled at its input to themetering assembly 22 for receiving metered amounts of cleaning solution(s) therefrom, and is coupled at its output to themanifolds 54 for controlling distribution of the metered cleaning solution(s) to the downstream commercial washing equipment. - Referring also to
FIG. 2 , thepumping cabinet 14 includes aframe 58 for supporting the various components of thesystem 10. The illustratedframe 58 includesbase members 62 engaging the ground,uprights 64 extending upwardly from thebase members 62, and a plurality ofcross beams 66 extending between theuprights 64. The right hand side of theframe 58 includes anupper extension 68 extending outwardly from the side of theframe 58, and alower extension 70 below the upper extension. The upper andlower extensions metering assembly 22. -
FIG. 3 illustrates the upper andlower extensions extension upper extension 68 includes a pair ofside legs 72 extending away from theframe 58 and abase leg 74 extending between theside legs 72. Eachside leg 72 includes atop hole 76 substantially centered along the length of theside leg 72, and a pair of inwardly-facing, spaced-apart,side holes 78 that face inwardly (only theside holes 78 of therear side leg 72 are visible inFIG. 3 ). Thebase leg 74 of theupper extension 68 also includes a pair of inwardly-facingside holes 78. In some constructions,side holes 78 and thetop hole 76 may have crimps in threaded inserts. - The
upper extension 68 also includes acentral support member 80 extending substantially parallel to theside legs 72 from thecross beam 66 of the frame to thebase leg 74. Thecentral support member 80 is substantially centered between theside legs 72 and is coupled (e.g., by welding) to the undersides of thecross beam 66 and thebase leg 74. Thecentral support member 80 includes a pair ofmounting holes 82 on an underside thereof (themounting holes 82 are showing facing upwardly inFIG. 3 to show their approximate location along thecentral support member 80, but in fact face downwardly when thesystem 10 is properly assembled). Thelower extension 70 is also substantially U-shaped and includes a pair ofside legs 84 extending away from theframe 58 and abase leg 86 extending between theside legs 84. Eachside leg 84 includes atop hole 88 substantially centered along the length of theside leg 72. - Referring also to
FIGS. 4 and 5 , themetering assembly 22 is configured to receive one or more cleaning solutions from thepumps 34, measure by weight a specific amount of cleaning solution or solutions, and discharge the measured amount of cleaning solution or solutions to thedischarge pump 50. Some or all components of themetering assembly 22 may be made of stainless steel or ethylene tetrafluoroethylene (ETFE) coated aluminum. However, the apparatus and articles of manufacture described herein are not limited in this regard. - Referring also to
FIG. 6 , themetering assembly 22 includes adosing cap 90 that is coupled to and supported by theupper extension 68. Thedosing cap 90 includes afloor 92 having formed therein a plurality ofapertures 94 sized and arranged to receive nozzles and conduits that are coupled to the various pumps 34. The illustrateddosing cap 90 also includes foursidewalls 96, with two of the sidewalls 96 defining opposedload openings 98 positioned near thefloor 92. As explained below, the remaining twosidewalls 96 each define anupwardly opening slot 102 that receives arespective end weight sensor 108 when the dosing tank is supported from theframe 58 by way of theweight sensor 108. - Although in the illustrated embodiment includes two
sidewalls 96 each defining theupwardly opening slot 102, other embodiments may include asingle sidewall 96 defining theupwardly opening slot 102. An open side (not shown) of thedosing cap 90 may then face toward the pumpingcabinet 14 when thedosing cap 90 is coupled to theupper extension 68 and accommodate the various conduits extending between thepumps 34 and the nozzles that are received by theapertures 94 of thedosing cap 90. In the illustrated embodiment without the open side, one of the sidewalls 96 defining theupwardly opening slot 102 also defines a plurality ofapertures 94 formed therein sized and arranged to accommodate the various conduits and nozzles. - Each
sidewall 96 defines a pair ofholes 106 along an upper edge thereof that are configured for alignment with the inwardly-facing side holes 78 in the upper extension. Fasteners (not shown) extend through theholes 106 and into the side holes 78 secure thedosing cap 90 to theupper extension 68. Adosing lid 107 covers thedosing cap 90. Thedosing lid 107 fits over and is coupled to the top holes 88 provided in theside legs 84 of theupper extension 68. - Referring also to
FIG. 7 , themetering assembly 22 further includes a weight sensor orload cell 108 having afirst end 110 coupled to thecentral support member 80 and asecond end 112 that supports other portions of themetering assembly 22. The first and second ends 110, 112 of the load cell each include a pair ofopenings 114 for securing theload cell 108 to other components. The illustratedload cell 108 also includes acentral sensing portion 116 that includes sensors 118 (e.g., strain gauges) configured to measure the load that is supported by theload cell 108. The illustratedload cell 108 is an OMEGA® brand LCAE-25KG load cell, however those skilled in the art will readily appreciate that other types, brands, and sizes of load cells or load/force measurement devices could also be used without departing from the spirit and scope of the present invention. - A weight sensor bracket or load cell bracket 120 (
FIGS. 8 a, 8 b, 8 c) is coupled to thesecond end 112 of theload cell 108. The illustratedload cell bracket 120 is a cylindrical rod and extends outwardly and away from theload cell 108. Theload cell bracket 120 includes a centrally-located flat 122 andcentral bores 124 for coupling to thesecond end 112 of theload cell 108. Each end of theload cell bracket 120 includes an axially-aligned threadedbore 126, and asmall overhanging tab 128. As shown inFIGS. 4 and 5 , a pair of load cell bracket covers 129 (FIG. 9 ) are coupled to thedosing cap 90 and cover the portions of theload cell bracket 120 that extend outwardly and away from theload cell 108. The load cell bracket covers 129 ensure that the conduits and other components coupled to and extending from thedosing cap 90 do not contact theload cell bracket 120, thereby eliminating a potential source of errors in the readings taken by theload cell 108. - The
load cell bracket 120 supports adosing tank 130 that receives and contains the cleaning solutions dispensed from the nozzles that are coupled to thedosing cap 90. As shown inFIG. 10 , thedosing tank 130 includessidewalls 132, two of which defineopposed openings 134. Thedosing tank 130 also includes downwardly and inwardly slopinginterior walls 138 that act as a funnel and terminate at abottom wall 142 defining adischarge opening 146. In the illustrated embodiment, thedosing tank 130 also includes asplash guard 147 therein. In other embodiments, however, thedosing tank 130 may not include thesplash guard 147. - With reference also to
FIGS. 4 and 5 , the ends of theload cell bracket 120 extend through and slightly beyond theopposed load openings 98 in thedosing cap 90. To couple thedosing tank 130 to theload cell bracket 120, thedosing tank 130 is moved upwardly and over the bottom portion of thedosing cap 90, which as noted above is coupled to and supported by theupper extension 68. Theopenings 134 in thedosing tank sidewalls 132 are then aligned with the axially-aligned threadedbores 126 of theload cell bracket 120. Fasteners (not shown) are then extended through theopenings 134 and threaded into the threaded bores 126 to couple thedosing tank 130 to the ends of theload cell bracket 120. The overhangingtabs 128 on the ends of theload cell bracket 120 fit over the ends of the dosing tank sidewalls 132 to prevent rotation of thedosing tank 130 with respect to the load cell bracket 120 (seeFIG. 4 ). Thedosing tank 130 is sized to loosely receive the lower portion of thedosing cap 90. Furthermore, theload cell openings 98 in the sidewalls of thedosing cap 90 are larger than theload cell bracket 120 such that theload cell bracket 120 extends through theopenings 98 without contacting the load cell openings. In this regard, even though thedosing tank 130 receives thedosing cap 90 and is in close proximity thereto, thedosing cap 90 is supported more or less directly and exclusively by theframe 58, whereas thedosing tank 130 is supported from theframe 58 by way of theload cell 108 andload cell bracket 120. Because thedosing tank 130 is supported from thesecond end 112 of theload cell 108, theload cell 108 is able to measure the weight of thedosing tank 130 and any cleaning solutions dispensed into thedosing tank 130. - Although in the illustrated embodiment the
weight sensor 108 is a load cell coupled to theload cell bracket 120, in other embodiments other structures performing the same function as theload cell 108 disclosed herein can be used instead. For example, in some embodiments the weight of the cleaning solution received by thedosing tank 130 may be measured by a sensor pad supporting an underside of thedosing tank 130. In some embodiments, theweight sensor 108 may include any mechanical assembly configured to measure the weight of the cleaning solution received by thedosing tank 130. In other embodiments, theweight sensor 108 may include a piezoelectric compression sensor or any other electric sensors depending on the usage requirements or preferences for the liquid metering andinjection system 10. Moreover, although the illustrated embodiment includes asingle weight sensor 108, other embodiments may include a plurality ofweight sensors 108, for example so as to reliably and accurately measure the weight of the cleaning solution. - As shown in
FIGS. 4 and 5 , avalve assembly 148 is coupled to and supported by thedosing tank 130. Thevalve assembly 148 includes aninlet 149 coupled to thedischarge opening 146 and can be closed and opened to either retain and collect cleaning solution in thedosing tank 130 or to allow cleaning solution to flow out of thedosing tank 130. The illustratedvalve assembly 148 includes an air-operateddiaphragm valve 150 that can be operated by pressurized air. Those skilled in the art will readily appreciate that other types of valves could also be used without departing from the spirit and scope of the present invention. When thevalve 150 is closed, cleaning solution collects in thedosing tank 130. When thevalve 150 is opened, cleaning solution flows by gravity feed out of thedosing tank 130, through thevalve assembly 148 and out adischarge tube 152 that extends downwardly from thevalve 150. Because thevalve assembly 148 is supported by thedosing tank 130, the mass of thevalve assembly 148 is included in the overall load that is supported by theload cell 108. - Referring also to
FIGS. 11 and 12 , thedischarge tube 152 of thevalve assembly 148 discharges cleaning solution into atransport tank 154 that is coupled to and supported by thelower extension 70 of theframe 58. Atransport tank lid 156 is also coupled to thelower extension 70, covers thetransport tank 154, and defines anopening 158 through which thedischarge tube 152 extends. In some embodiments, thedischarge tube 152 may include a through-pipe rubber grommet (not shown) that creates a light seal between thedischarge tube 152 and theopening 158 in thetransport tank lid 156 without affecting the movement of thedosing tank 130. In this way, thedosing tank 130 andvalve assembly 148 are supported substantially exclusively by theload cell 108 and theload cell bracket 120. Like thedosing tank 130, thetransport tank 154 also includes downwardly and inwardly sloping interior walls 160 (FIG. 11 ) that act as a funnel and guide cleaning solution(s) in thetransport tank 154 toward a centrally located discharge opening (not shown) in the bottom of thetransport tank 154. A conduit 162 (FIG. 1 ) extends from the bottom of thetransport tank 154 and is coupled to thedischarge pump 50, which pumps cleaning solution(s) from thetransport tank 154 to themanifolds 54 for distribution to the downstream equipment. - In the above-described
metering assembly 22, theload cell 108 supports theload cell bracket 120, thedosing tank 130, and thevalve assembly 148. Thedosing cap 90 anddosing lid 107 are supported by theupper extension 68, and thetransport tank 154 andtransport lid 156 are supported by thelower extension 70. Thus, as cleaning solution is dispensed into thedosing tank 130, the weight supported by theload cell 108 increases in proportion to the volume of solution that is dispensed, allowing for an accurate measurement of cleaning solution volume for subsequent discharge to downstream equipment. - In use, the control system housed in the
control cabinet 18 responds to operator or automated requests for dispensing a specific cleaning solution by operating themetering assembly 22 to measure the appropriate quantity of the specific cleaning solution. To measure a specific quantity of a given cleaning solution, thediaphragm valve 150 is closed and thepump 34 associated with the cleaning solution is turned on. Turning on thepump 34 pumps cleaning solution through conduits in the pumpingcabinet 14 to the corresponding discharge nozzle (not shown) that is coupled to thefloor 92 of thedosing cap 90. The cleaning solution is then discharged into thedosing tank 130. Because thediaphragm valve 150 is closed, the cleaning solution begins to accumulate in thedosing tank 130, and the load on theload cell 108 begins to increase. - The densities of the various cleaning solutions pumped by the
system 10 are pre-programmed into the control system. As such, the control system is able to monitor the weight of the cleaning solution via the load readings provided by theload cell 108, and can then convert the weight of the cleaning solution into a volume of cleaning solution that has been dispensed. In some applications, overall cycle time of thesystem 10 can be reduced by constantly monitoring the load on theload cell 108 and adjusting the speed of thepump 34 on the fly. For example, at the beginning of a discharge cycle thepump 34 can be operated at maximum speed to rapidly fill thedosing tank 130. However, as the desired quantity of cleaning solution is approached, the speed of thepump 34 can be reduced to allow the final amount of cleaning solution dispensed to be controlled more precisely. - Once the desired amount of cleaning solution has been transferred to the
dosing tank 130, thepump 34 is turned off and thediaphragm valve 150 is opened. The cleaning solution then flows by gravity through thedischarge tube 152 and into thetransport tank 154. As the cleaning solution is flowing into thetransport tank 154, the control system can continue to monitor the load on theload cell 108 and thus be able to detect when thedosing tank 130 is completely empty. When thedosing tank 130 is empty, thediaphragm valve 150 is closed and another metered dose of cleaning solution can be prepared, potentially before the previously-metered dose of cleaning solution has been pumped from thetransport tank 154 by thedischarge pump 50. For certain operating parameters, it may also be desirable to mix metered amounts of different cleaning solutions in thetransport tank 154 before thetransport tank 154 is emptied by thedischarge pump 50. Once the final desired amount of cleaning solution or solutions have been transferred to thetransport tank 154, thedischarge pump 50 is operated and themanifolds 54 are controlled to supply the metered and optionally pre-mixed cleaning solution(s) to the appropriate downstream equipment. - The
system 10 is advantageously configured to dispense a plurality of different cleaning solutions (e.g., twelve in the illustrated embodiment). In some circumstances, these different cleaning solutions may be dangerously reactive with one another. To reduce potential risks associated with the mixing of incompatible cleaning solutions, the first and second water flush pumps 42, 46 can be used to rinse thedosing tank 130 and thetransport tank 154, respectively. The first waterflush pump 42 is connected via conduits to thedosing cap 90 and is operable to pump rinse water into thedosing tank 130. The second waterflush pump 46 is connected via conduits to thetransport tank 154 ortransport tank lid 156, and is operable to pump rinse water into thetransport tank 154. In some embodiments, the control system can be pre-programmed to recognize potentially dangerous combinations of cleaning solutions and to rinse thedosing tank 130 and/or thetransport tank 154 as needed between metering operations. - The
system 10 may also include a self-calibration feature that utilizes a float assembly mounted to thedosing cap 90. The float assembly extends or can be adjusted to extend downwardly from thedosing cap 90 to sense a location of the free surface of any liquid contained within thedosing tank 130. Thus, the control system can fill thedosing tank 130 with a liquid of known density (e.g., water) to a predetermined calibration level having a known volume by sensing the level of the liquid with the float assembly. The control system can then compare the reading of theload cell 108 with the expected reading based upon the known volume and known density of the liquid that held in the dosing tank, and can adjust the calibration level of theload cell 108 as necessary. In other embodiments, the self-calibration feature may utilize an ultra sonic sensor or a sight glass instead of a float assembly. In still other embodiments, thesystem 10 may not include a self-calibration feature. For example, a known amount of liquid may be injected so as to eliminate the need for a self-calibration feature. The apparatus and articles of manufacture described herein are not limited in this regard. - In view of the foregoing, the
system 10 is operable to meter and dispense a desired amount of cleaning solution by measuring the weight of the cleaning solution before dispensing the cleaning solution to downstream equipment. Thesystem 10 includes adosing tank 130 supported by aload cell 108. Thesystem 10 is configured to minimize possible interference with readings of theload cell 108 by supporting at least thedosing cap 90 and thetransport tank 154 by separate structure, such as the upper andlower extensions system 10 includes two tanks, namely thedosing tank 130 and thetransport tank 154, a first measured quantity of cleaning solution can be prepared in thedosing tank 130 and transferred to thetransport tank 154. Then, before the first measured quantity of cleaning solution is transferred from thetransport tank 154, a second measured quantity of cleaning solution can begin to be prepared in the now-empty dosing tank 130, thereby reducing overall cycle time of the system. The two tank arrangement also allow for the pre-mixing of multiple measured quantities of cleaning solutions in thetransport tank 154. The system is also capable of performing self-calibration of theload cell 108 using a float assembly mounted to thedosing cap 90. - It is understood that the disclosure may embody other specific forms without departing from the spirit or central characteristics thereof. The disclosure of aspects and embodiments, therefore, are to be considered as illustrative and not restrictive. While specific embodiments have been illustrated and described, other modifications may be made without significantly departing from the spirit of the invention.
Claims (20)
1. A liquid metering system for a commercial or industrial laundry operation, the system comprising:
a dosing tank configured to receive a cleaning solution;
a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank; and
a discharge pump operable to pump the measured cleaning solution from the dosing tank to downstream equipment.
2. The system of claim 1 further comprising a valve assembly operable to transfer the measured cleaning solution from the dosing tank to the transport tank.
3. The system of claim 1 further comprising a control system operatively connected to the weight sensor and discharge pump, wherein the control system monitors the weight of the cleaning solution and adjusts a speed of the discharge pump.
4. The system of claim 3 , wherein the control system regulates the discharge pump at a first speed during a first mode of operation and at a second speed that is slower than the first speed during a second mode of operation.
5. The system of claim 3 , wherein the control system is configured to be programmed with a density of the cleaning solution, and whereby the control system monitors a volume of the cleaning solution.
6. The system of claim 5 further comprising a float assembly coupled to the dosing tank, wherein the float assembly is configured to sense a level of the cleaning solution contained within the dosing tank for performing self-calibration of the control system.
7. The system of claim 1 further comprising a manifold configured to receive a plurality of measured cleaning solutions from respective discharge pumps, to mix the plurality of measured cleaning solutions, and to deliver the mixed cleaning solution to the downstream equipment.
8. The system of claim 1 further comprising a weight sensor bracket coupled to the dosing tank, and wherein the dosing tank is supported substantially exclusively by the weight sensor and the weight sensor bracket.
9. The system of claim 8 , wherein the weight sensor includes a first end, a second end, and a sensing portion positioned therebetween, and wherein at least one of the first and second ends is coupled to the weight sensor bracket.
10. The system of claim 9 , wherein the sensing portion includes a strain gauge.
11. The system of claim 1 further comprising a transport tank configured to receive the measured cleaning solution from the dosing tank.
12. The system of claim 11 , wherein the dosing and transport tanks are supported by separate structures.
13. The system of claim 11 further comprising a flush pump connected to at least one of the dosing and transport tanks, wherein the flush pump is operable to rinse water into at least one of the dosing and transport tanks.
14. A metering assembly for a commercial or industrial laundry operation, the metering assembly comprising:
a dosing tank configured to receive a cleaning solution; and
a weight sensor configured to measure a weight of the cleaning solution received by the dosing tank.
15. The metering assembly of claim 14 further comprising a weight sensor bracket coupled to the dosing tank, wherein the dosing tank is supported substantially exclusively by the weight sensor and the weight sensor bracket.
16. The metering assembly of claim 15 , wherein the weight sensor includes a first end, a second end, and a sensing portion positioned therebetween, and wherein at least one of the first and second ends is coupled to the weight sensor bracket.
17. The metering assembly of claim 16 , wherein the sensing portion includes a strain gauge.
18. The metering assembly of claim 14 further comprising a transport tank configured to receive the measured cleaning solution from the dosing tank.
19. The metering assembly of claim 18 , wherein the transport tank is configured to receive a plurality of measured cleaning solutions from the dosing tank, and to mix the plurality of measured cleaning solutions.
20. The metering assembly of claim 18 , wherein the dosing and transport tanks are supported by separate structures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/687,812 US20130134184A1 (en) | 2011-11-28 | 2012-11-28 | Liquid metering and injection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US201161564038P | 2011-11-28 | 2011-11-28 | |
US13/687,812 US20130134184A1 (en) | 2011-11-28 | 2012-11-28 | Liquid metering and injection system |
Publications (1)
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US20130134184A1 true US20130134184A1 (en) | 2013-05-30 |
Family
ID=48465893
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US13/687,812 Abandoned US20130134184A1 (en) | 2011-11-28 | 2012-11-28 | Liquid metering and injection system |
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CA (1) | CA2797154A1 (en) |
Cited By (3)
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CN104961091A (en) * | 2015-07-02 | 2015-10-07 | 成都朗默科技有限责任公司 | Weighing container system, weighing type liquid distribution system and method |
WO2015197404A1 (en) * | 2014-06-23 | 2015-12-30 | Olympus Winter & Ibe Gmbh | Cleaning and/or disinfecting device |
DE102017105418A1 (en) * | 2017-03-14 | 2018-09-20 | Agrotop Gmbh | Device for filling tanks with intermediate container |
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- 2012-11-28 US US13/687,812 patent/US20130134184A1/en not_active Abandoned
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WO2015197404A1 (en) * | 2014-06-23 | 2015-12-30 | Olympus Winter & Ibe Gmbh | Cleaning and/or disinfecting device |
CN106455902A (en) * | 2014-06-23 | 2017-02-22 | 奥林匹斯冬季和Ibe有限公司 | Cleaning and/or disinfecting device |
CN104961091A (en) * | 2015-07-02 | 2015-10-07 | 成都朗默科技有限责任公司 | Weighing container system, weighing type liquid distribution system and method |
DE102017105418A1 (en) * | 2017-03-14 | 2018-09-20 | Agrotop Gmbh | Device for filling tanks with intermediate container |
DE102017105418B4 (en) * | 2017-03-14 | 2021-03-18 | Agrotop Gmbh | Device for filling tanks with intermediate containers |
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