US20040226959A1 - Methods of dispensing - Google Patents

Methods of dispensing Download PDF

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Publication number
US20040226959A1
US20040226959A1 US10/436,454 US43645403A US2004226959A1 US 20040226959 A1 US20040226959 A1 US 20040226959A1 US 43645403 A US43645403 A US 43645403A US 2004226959 A1 US2004226959 A1 US 2004226959A1
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US
United States
Prior art keywords
ingredient
amount
dispensed
time
dispensing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/436,454
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English (en)
Inventor
Richard Mehus
John Thomas
Thomas Batcher
Bryan Maser
Michael Shulman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecolab USA Inc
Original Assignee
Ecolab Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecolab Inc filed Critical Ecolab Inc
Priority to US10/436,454 priority Critical patent/US20040226959A1/en
Assigned to ECOLAB INC. reassignment ECOLAB INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MEHUS, RICHARD J., BATCHER, THOMAS J., MASER, BRYAN A., SHULMAN, MICHAEL, THOMAS, JOHN E.
Priority to BRPI0410177-4A priority patent/BRPI0410177A/pt
Priority to CN200480012860.1A priority patent/CN1787771B/zh
Priority to CA2762124A priority patent/CA2762124C/en
Priority to JP2006532437A priority patent/JP4855938B2/ja
Priority to AU2004238211A priority patent/AU2004238211B2/en
Priority to CA2524169A priority patent/CA2524169C/en
Priority to MXPA05012124A priority patent/MXPA05012124A/es
Priority to PCT/US2004/012165 priority patent/WO2004100756A2/en
Publication of US20040226959A1 publication Critical patent/US20040226959A1/en
Priority to JP2009277006A priority patent/JP2010094524A/ja
Priority to AU2010212307A priority patent/AU2010212307B2/en
Priority to US14/029,374 priority patent/US9376306B2/en
Assigned to ECOLAB USA INC. reassignment ECOLAB USA INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ECOLAB INC.
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4436—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • B01F21/22—Dissolving using flow mixing using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2117—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2211—Amount of delivered fluid during a period
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/24—Weighing mechanism control arrangements for automatic feed or discharge

Definitions

  • This invention relates to methods of dispensing an ingredient and, more particularly, to methods of dispensing an ingredient in which the dispensed is controlled by a dispenser.
  • Dispensing systems to dispense an ingredient for a commercial purpose have been widely used in many industries. For example, in the restaurant industry, warewashing systems are employed to rapidly wash large quantities of eating utensils, plates, pots, pans, glassware, etc. In another example in the hotel industry, linens, towels, clothing and the like are washed in commercial cleaning systems. Such systems commonly employ dispensers to dispense chemicals, such as detergents, to effectively perform the washing function.
  • dispensers and control systems for such dispensers have been utilized.
  • Such dispensers, control systems and methods for controlling such dispensers have utilized a variety of techniques.
  • such methods may dispense a predetermined amount of the ingredient into the cleaning apparatus for each cycle of the apparatus.
  • Other systems and methods attempt to determine when the ingredient needs to be replenished in the cleaning apparatus by measuring a characteristic of the cleaning apparatus, e.g., measuring the conductivity of a use solution to determine when additional detergent needs to be added.
  • Dispensing an ingredient, usually from a container (either in a dispenser or self-contained) in order to accurately measure an amount of an ingredient dispensed provides significant advantages.
  • accurately measuring an amount of an ingredient dispensed can be advantageously used in a dispenser to adjust a dispenser which otherwise dispenses the ingredient on another basis, e.g., on the basis of time.
  • the present invention provides a method of dispensing a requested amount of an ingredient.
  • the ingredient is dispensed based on a factor affecting a dispensed amount of the ingredient.
  • the dispensed amount of the ingredient is determined.
  • the factor is adjusted for a subsequent dispense cycle using a comparison between the requested amount and the dispensed amount.
  • the present invention provides a method of dispensing a requested amount of an ingredient from a container.
  • An initial weight of the ingredient in the container is measured.
  • the ingredient is dispensed from the container for a predetermined period of time.
  • a final weight of the ingredient in the container is measured.
  • a dispensed amount of the ingredient dispensed during the predetermined period of time is determined by comparing the final weight with the initial weight.
  • the predetermined period of time is adjusted for a subsequent dispense cycle using a comparison between the requested amount and the dispensed amount.
  • the present invention provides a method of dispensing a requested amount of an ingredient from a container by eroding the ingredient with a diluent.
  • An initial weight of the ingredient in the container is measured.
  • the ingredient is dispensed from the container for a predetermined period of time.
  • a time lag allows the diluent to drain from the ingredient.
  • a final weight of the ingredient in the container is measured.
  • a dispensed amount of the ingredient dispensed during the predetermined period of time is determined by comparing the final weight with the initial weight.
  • the dispensed weight is compared with the requested weight.
  • the predetermined period of time for a subsequent dispense cycle is adjusted as a function of the comparing step.
  • the present invention provides a method of dispensing a requested amount of an ingredient in each of a plurality of cycles.
  • the ingredient in each of the plurality of cycles is dispensed based on a factor affecting a dispensed amount of the ingredient.
  • the dispensed amount of the ingredient over the plurality of cycles is determined.
  • the predetermined factor is adjusted for a subsequent dispense cycle using a comparison between the requested amount over the plurality of cycles and the dispensed amount.
  • the predetermined amount of time is adjusted downward if the dispensed amount exceeds the requested amount.
  • the predetermined amount of time is adjusted upward if the requested amount exceeds the dispensed amount.
  • the factor comprises a pumping speed of a pump used to dispense the ingredient.
  • the factor comprises an effectiveness of a grinder used to dispense the ingredient.
  • the factor comprises a speed of dispenser used to dispense a powdered ingredient.
  • the factor comprises a degree of flooding the ingredient.
  • the factor comprises a temperature at which the ingredient is dispensed.
  • the ingredient is dispensed by eroding the ingredient with a diluent.
  • the initial weight is compared with a known weight representative of an empty container and the container is replaced before dispensing if the comparison indicates that the container is empty.
  • the plurality of cycles is at least two.
  • accurately measuring the weight of an ingredient being dispensed e.g., from a powdered or solid ingredient being eroded by a diluent, can be advantageously utilized in methods to control the erosion where the amount of the ingredient being dispensed his being partially masked by the weight of the diluent.
  • the present invention provides a method of dispensing a requested amount of an ingredient from a container, i.e., eroding the ingredient with a diluent.
  • the ingredient is weighed.
  • the diluent is activated to erode the ingredient.
  • a measured weight loss from a maximum weight of the ingredient is determined.
  • the diluent is deactivated when the measured weight loss indicates that the requested amount will be dispensed.
  • the present invention provides a method of dispensing a requested amount of an ingredient.
  • the ingredient is weighed.
  • a dispenser is activated to dispense the ingredient.
  • a weight loss of the ingredient is determined at least in part by measuring a rate at which the ingredient is being dispensed. The dispenser is the activated when the weight loss indicates that the requested amount will be dispensed.
  • the ingredient is solid.
  • the diluent is sprayed on the ingredient.
  • the diluent is sprayed on the ingredient from below the ingredient.
  • a minimum weight is reached after activation and before the maximum weight.
  • the ingredient is powdered.
  • the deactivating step is accomplished when the measured weight equals the difference between the maximum weight and the requested amount minus an offset.
  • the offset is based upon an amount of the ingredient dispensed between a time at which the activating step occurs and a time when the ingredient reaches the maximum weight.
  • the offset is empirically determined.
  • the offset is additionally based upon a trailing amount of the ingredient dispensed following the deactivating step.
  • the rate at which the ingredient is being dispensed is a function of measuring a slope of a dispensing curve.
  • the determining step comprises measuring a maximum of the ingredient and a rate at which the ingredient is being dispensed to interpolate a time when the requested amount of the ingredient will be dispensed.
  • accurately measuring the weight of an ingredient being dispensed can be advantageously used along with measurement of a factor indicative of the effectiveness of the ingredient in the apparatus.
  • the ingredient dispensed is based on the factor in order to maintain the effectiveness of the ingredient in the apparatus.
  • the present invention provides a method of dispensing an ingredient for use in an apparatus.
  • the ingredient has an effectiveness in use in the apparatus in which the effectiveness is dependent upon a measurable factor.
  • the factor is measured.
  • An amount of the ingredient to be dispensed is predicted based at least in part on the factor. The amount of the ingredient is dispensed.
  • the present invention provides a method of dispensing a concentrate into an apparatus having a sump containing a solution of the concentrate in a diluent in which any effectiveness of the concentrate declines in use.
  • the effectiveness is dependent upon a measurable factor. The factor is measured. Whether an additional amount of the concentrate should be added to the sump in order to increase the effectiveness is determined. The additional amount of the concentrate is dispensed, if required.
  • the present invention provides a method of dispensing a concentrate in each of a plurality of cycles into an apparatus having a sump containing a diluent in which any effectiveness of the concentrate declines in use.
  • the effectiveness is dependent upon a measurable factor.
  • the factor is measured in each of the plurality of cycles.
  • An amount of the concentrate is dispensed in each of the plurality of cycles based at least in part on the factor.
  • the ingredient is dispensed into a solution in the apparatus.
  • the factor is a function of the solution.
  • the factor is the pH of the solution.
  • the factor indicates too much of the concentrate in the sump.
  • the measuring step indicates that the sump has been refilled with fresh diluent and wherein the dispensing step dispenses a refill amount of the concentrate.
  • the amount of the concentrate dispensed is dependent upon a dispense time and wherein the dispense time is adjusted based at least in part on the measuring step.
  • FIG. 1 is an illustration of a dispenser in which some or all of methods of the present invention may find usefulness
  • FIG. 2 is a chart illustrating the weight of a dispensing ingredient of the dispenser of FIG. 1;
  • FIG. 3 is a flow chart illustrating an embodiment of the invention in which an ingredient is dispensed by eroding the ingredient with a diluent;
  • FIG. 4 is a flow chart illustrating a first portion of a more detailed preferred embodiment of the method illustrated in FIG. 3;
  • FIG. 5 is a flow chart illustrating a second portion of the method of FIG. 4;
  • FIG. 6 is a flow chart illustrating an embodiment of the invention in which an ingredient is dispensed based on the result of a previous dispense cycle
  • FIG. 7 is a flow chart illustrating a more detailed preferred embodiment of the method illustrated in FIG. 6;
  • FIG. 8 is a flow chart illustrating a first portion of an embodiment of the invention in which an amount of an ingredient is dispensed based upon a predicted amount of the ingredient needed to maintain an effectiveness of the ingredient;
  • FIG. 9 is a flow chart illustrating a second portion of the method of FIG. 8.
  • FIG. 10 is a flow chart illustrating an alternative embodiment of the method illustrated in FIG. 8 and FIG. 9.
  • Dispenser 10 includes a housing 12 that has an outer wall 12 a having a cavity (not shown). Outer wall 12 a has a larger diameter at the top so as to accommodate capsule (not shown).
  • the capsule in a preferred embodiment, contains a solid block of an ingredient to be dispensed.
  • Inlet hose 15 allows a diluent to be sprayed into capsule and onto the block of ingredient to be dispensed effectively eroding a portion of the block of ingredient.
  • Sump region 12 c provides for a collection that region for a use solution of the eroded ingredient and the diluent.
  • Hose 17 is connected to outlet 14 allowing the use solution to be directed to a desired location.
  • Load cell 22 measures that combined weight of capsule, the block of ingredient and any diluent contained in capsule.
  • Dispenser 10 operates by spraying a diluent through inlet host 15 into capsule and onto the block of ingredient. As the block of ingredient is eroded, a mixture of eroded ingredient and diluent is discharged from dispenser 10 through hose 17 . Load cell 22 accurately measures the combined weight before the diluent is sprayed onto the block of ingredient, while the diluent is sprayed onto the block of ingredient and after the diluent is sprayed onto the block of ingredient.
  • FIG. 2 is a chart illustrating the effect of the spray of diluent onto the block of ingredient in the dispenser of FIG. 1.
  • the mantissa is time and the ordinate is weight in grams.
  • Time 50 before the initiation of spray represents the starting combined weight, netted out at approximately zero (0) grams, for purposes of illustration.
  • Spray is initiated at time 52 at which point two things begin to happen. First, pressure from the diluent sprayed on the underside of the block of ingredient relieves some of the combined weight from load cell 22 . Second, the added weight from diluent accumulating in capsule tends to cause an increased combined weight.
  • the combined weight on load cell 22 initially decreases until time 54 at which point the combined weight reaches an initial minimum of approximately minus four ( ⁇ 4) grams.
  • the added weight of the diluent in capsule causes the combined weight to rather significantly increase.
  • the added weight of the diluent in capsule tends to stabilize as the block of ingredient is eroded.
  • the block of ingredient As the block of ingredient is eroded, its weight decreases.
  • the combined weight reaches a maximum at approximately sixteen (16) grams.
  • the block of ingredient continues to be eroded as the diluent continues to spray. Since the added weight of the diluent in capsule has stabilized, the combined weight continues to decrease during time 58 until the spray is discontinued.
  • the spray of diluent is discontinued at time 60 causing a momentary weight gain for the combined weight as the upward pressure on the block of ingredient is discontinued.
  • diluent continues to drain from capsule during time period 62 resulting in the near final weight at time 64 of approximately minus twenty-six ( ⁇ 26) grams.
  • the difference between the starting weight at time 50 of approximately zero (0) grams and the ending weight of approximately minus twenty-six ( ⁇ 26) grams, once the diluent has drained from capsule, of twenty-six (26) grams represents the amount of ingredient dispensed.
  • the difference between the maximum weight of approximately sixteen (16) grams and the weight at time 60 of approximately minus nine ( ⁇ 9) grams when spray is discontinued is only twenty-five (25) grams. This is because ingredient was eroded from the block of ingredient during time 66 , between time 52 when spray is begun and time 56 when the maximum is measured, and also during time 62 as diluent drains from capsule.
  • a requested amount of the ingredient requested is set (block 110 ).
  • Load cell 22 weighs the ingredient (block 112 ).
  • a valve is turned on (block 114 ) at time 52 initiating the spray of diluent against the block of ingredient.
  • the process waits (block 116 ) for a minimum weight at time 54 to be reached.
  • the process waits (block 118 ) for diluent being added by spray to accumulate in capsule and increase the combined weight. Note that if the step represented by block 116 is omitted, it is still proper to wait for weight gain in block 118 .
  • the method searches for a maximum combined weight at time 56 and, once found, records that peak weight (block 122 ). Again optionally, the process waits for weight loss (block 124 ). Load cell 22 measures (block 126 ) the amount of weight lost from the maximum or peak weight recorded. Optionally, the process adjusts for an offset (block 128 ) which is explained below.
  • the process determines (block 130 ) whether the measured weight lost is equal to an amount which will result in a dispensed amount of ingredient which equals the requested amount. When such a determination is made, the valve is turned off (block 132 ) discontinuing the spray of diluent against the block of ingredient. The process stops (block 134 ) until the process is repeated by again setting a requested amount (block 110 ).
  • the amount of weight lost from capsule during time 58 does not necessarily equal the total weight of the ingredient eroded and, hence, dispensed.
  • an amount of the ingredient which is additionally dispensed during time 66 and time 62 can be calculated and/or estimated by a variety of means. For example, this amount can be determined empirically from previous dispensed cycles.
  • the slope of curve 48 during all or a portion of time 58 may be determined and an original maximum 68 may be determined by regression to account for an amount of the ingredient eroded during time 66 .
  • the amount of additional ingredient eroded during times 66 and 62 can be accounted for in the method in block 128 by adjusting the time 60 at which the spray of the diluent is discontinued. For example, if it is determined that the additional amount of the ingredient dispensed during time periods 66 and 62 is equal to approximately one (1) gram, then time 60 can be adjusted to turn off the spray of diluent when the measured weight loss is equal to the requested amount of ingredient minus one (1) gram.
  • FIG. 4 is a flow chart illustrating a more detailed process.
  • the process starts at block 150 waiting for a dispense request.
  • a determination is made at block 152 whether or not a dispensed request has occurred.
  • the starting weight is logged, the requested amount is determined and the diluent spray valve is turned on (block 154 ).
  • the initial weight loss is evaluated (block 156 ). If the weight loss is excessive (block 158 ) a fault is recorded (block 160 ).
  • the weight gain is evaluated (block 162 ) to determine if a peak weight has been reached (block 164 ).
  • the peak weight is recorded (block 166 ) and a branch is made to compute an offset value (block 168 ).
  • Dispensing continues (block 170 ) and the offset (from offset value in block 172 ) is subtracted (block 174 ) from the requested amount. If the requested amount is greater (block 176 ) than the amount remaining, a determination is made (block 178 ) whether the capsule is empty. If the capsule is empty, the spray valve is turned off (block 180 ) and an alarm is sounded (block 182 ). If the capsule is not empty or if the requested amount is still greater than the amount remaining, the current weight is subtracted from the previous weight and added to the startup offset (block 184 ).
  • the spray valve is turned off (block 188 )
  • the process waits (block 190 ) and updates the offset buffer (block 192 ) before returning to the wait for dispense request at block 150 .
  • the startup offset plus the previous weight is not equal to the requested amount, and the process returns to block 184 and the current weight is again subtracted from the previous weight and added to the startup offset (block 184 ).
  • FIG. 5 is a flow chart illustrating the offset value calculation from the flow chart illustrated in FIG. 4. From the offset value in FIG. 4 (block 194 ), the process determines whether this is the capsule's first dispense cycle (block 196 ). If it is, the process uses a predetermined new capsule startup value (block 198 ) before updating the FIFO buffer with the new offset amount (block 200 ) and returning (block 202 ) to the offset value in FIG. 4. If however (at block 196 ) it is not the capsule's first dispense cycle, the process determines (block 204 ) if it is the capsule's second dispense cycle.
  • an average (block 206 ) between the predetermined new capsule startup value and an empirical result from the first dispense cycle is sent to the FIFO buffer (block 200 ) and the process returns to FIG. 4 (block 202 ). If however (at block 204 ) it is not the capsule's second dispense cycle, the process determines (block 208 ) if it is the capsule's third dispense cycle. If it is, an average (block 210 ) of a new capsule startup value and empirical result from the first and second dispense cycles is sent to the FIFO buffer (block 200 ) and the process returns to FIG. 4 (block 202 ).
  • an average (block 212 ) of the empirical result from the capsule's last three dispensed cycles are used as an offset and sent to the FIFO buffer (block 200 ) and the process returns to FIG. 4 (block 202 ).
  • FIG. 6 An alternative embodiment of a method of the present invention is illustrated in the flow chart of FIG. 6 which can be utilized, for example, in a dispenser which dispense as an ingredient for a predetermined period of time in each of a plurality of cycles.
  • a desired weight of an amount of the ingredient to be dispensed is determined (block 220 ).
  • the initial weight is measured (block 222 ).
  • a determination is made (block 224 ) on whether the initial weight is greater than the weight of an empty capsule. If the initial weight is not greater than the weight of an empty capsule, the capsule may be changed (block 226 ) and the process again measures the initial weight (at block 222 ).
  • the ingredient is dispensed (block 228 ) for the predetermined period of time. Following dispensing, the amount of dispensed ingredient is determined (block 230 ). If the amount actually dispensed should disagree with the desired amount to be dispensed, the period of time for the next dispense period (block 228 ) is appropriately adjusted (block 232 ). The initial weight is then set to be equal to the final weight (block 234 ) to properly enable the next dispense cycle.
  • FIG. 7 is a flow chart illustrating a more detailed method of FIG. 6.
  • the weight to be dispensed is set (block 220 ) and the initial weight is measured (block 222 ).
  • a determination (block 224 ) is made on whether the capsule is empty and whether the capsule should be changed (block 226 ).
  • the ingredient is dispensed for a predetermined period of time (block 228 ).
  • the process waits (block 236 ) for any remaining diluent to drain from the capsule.
  • the final weight is measured (block 238 ) and the dispensed weight is determined (block 240 ).
  • the weight dispensed is compared (block 242 ) to the set weight and the predetermined period of time to dispense for the next cycle is adjusted (block 232 ) appropriately. As an example, if the amount dispensed is greater than the set amount, then the period of time to dispense would be adjusted downward. However, if the amount dispensed is less than the set amount, then the period of time to dispense would be adjusted upward. And, of course, if the amount dispensed equals the set amount no adjustment need be made. The initial weight is then set to be equal to the final weight (block 234 ) to properly enable the next dispense cycle.
  • FIG. 8 and FIG. 9 An alternative embodiment of a method of the present invention is illustrated in the flow chart of FIG. 8 and FIG. 9 which can be utilized in any of the dispensers described or other dispensers.
  • the process first waits for a dispense request (block 250 ) using the determination block 252 based on whether a cycle signal has been received. Once a cycle signal is received, the process measures a factor which, at least in part, is indicative of the effectiveness of the ingredient being dispensed into the machine in which the ingredient is utilized. In one example in a machine in which the ingredient is dispensed into a use solution in a sump, a measurement of the pH of the use solution is indicative of an amount of detergent (for example, an alkaline detergent) contained in the use solution.
  • an amount of detergent for example, an alkaline detergent
  • a dispenser can predict an amount of ingredient, in this case detergent, which should be dispensed into the machine.
  • ingredient in this case detergent
  • pH of a use solution is just an example of one of many factors which may be indicative of the effectiveness of the ingredient being dispensed.
  • other examples could include temperature, turpidity, conductivity, water pressure, or another factor not related to the use solution per se such as a degree of soiling of the dishes or the length of time since the last cycle.
  • the pH is measured (block 254 ) and a determination (block 256 ) on whether the measured pH is greater than an upper limit is made. If the pH is greater than the upper limit, the machine already has too much detergent, the present dispense cycle is skipped and the process returns to block 250 to wait for the next dispense request. If, however, the measured pH is not greater than the upper limit, a determination (block 258 ) is made on whether the pH is lower than a lower limit. If not, then the detergent amount is with in a normal range and the process dispenses (block 260 ) a regular amount of detergent for the current dispense cycle.
  • FIG. 10 is a flow chart illustrating generally how the predictive process of FIG. 9 can be integrated in a dispensing method previously illustrated in FIG. 3. Instead of setting the amount of ingredient to be dispensed (as is done in FIG. 3), the process waits for a dispense request (block 250 ) and determines (block 252 ) whether a dispense cycle has been requested. If a dispense cycle has been requested, the amount of the ingredient which needs to be dispensed is predicted (block 270 ) using the techniques illustrated in FIG. 9. Essentially having substituted the predictive process of FIG. 9 for the manual setting of FIG. 3, the process of FIG. 10 continues essentially identical to the process illustrated in FIG. 3 beginning with block 112 without optional steps represented by blocks 124 and 128 .
  • the present invention has applicability in many areas in addition to those already discussed. The following is a list of at least some of the areas in which the invention may be used.
  • a load cell could be utilized to measure a pre-set amount of ready-to-use insecticide which would enable the user to document proof of delivery for regulatory compliance, while ensuring a consistent dose was used for each application.
  • Use in the vehicle cleaning market could encompass the use of a chemical measurement device for a vehicle care product dispenser.
  • the product could be in a solid, liquid or gel form. Delivery would be by conventional means such as a recirculating system for solid products or pump systems for liquids or gels.
  • the load cell would measure precise weight changes in the product being delivered from a concentrate to create a ready-to-use solution or an intermediate solution that can be diluted at a user's convenience.
  • the prior art procedures require chemical or volumemetric measurements by operators of product usage to ensure reproducible product delivery.
  • product type varies greatly in chemical components for vehicle cleaning products, different chemical tests need to be developed and validated for each new product.
  • Batch to batch variations in solid dissolution rates require very stringent quality control measures and greatly restrict new product development of solid systems.
  • Large variations in product use temperature due to seasonal temperature variations in the vehicle cleaning market have negative effects on liquid product viscosities. Water pressure variations within vehicle cleaning sites result in wide changes in product delivery as many dilution systems are based on siphon technology. These variations often result in unacceptable differences in product delivery.
  • Still another area where the present invention could be utilized is in the janitorial and health care areas.
  • the janitorial business would be able to utilize the technology of the present invention for accurately dispensing two component chemistries as well as cross linking chemistries for floor care.
  • the present invention would be able to be utilized for proof of delivery for sanitizers and disinfectants.
  • the technology would be available for both liquid and solid products.
  • the present invention is also applicable for Housekeeping.
  • the invention is able to be utilized as a platform for accurate solid, liquid or concentrate proportioning when it is used in conjunction with a device that can quantify an amount of water passing through a pipe.
  • a proportion would be known. So in an accurate dispenser of this kind, the user would set a proportion. While water is filling up the use vessel, the concentrate is dispensed. Dispensing the concentrate occurs until the proportion is satisfied. If a known amount of water is passed through a pipe in a fixed time, the dispenser could dispense the concentrate to satisfy the proportion. For example, if 100 milliliters of water is passed through the dispenser, a known amount of concentrate would be needed to satisfy the set proportion. The known amount of concentrate could be dispensed and stopped, when the load cell is satisfied.
  • the present invention is also applicable for laundry systems.
  • Present laundry systems service two machines at a relatively high cost.
  • the system is both complex and costly.
  • the load cell technology of the present invention would reduce both the cost and complexity of a current laundry dispenser.
  • the current laundry system for liquid also has significant drawbacks in that there is no empty drum alarm and no way to compensate for the reduced output of the peristaltic pump dispensing.
  • Load cell technology of the present invention would allow for accurate dispensing of the peristaltic pump over time, providing a signal of when to change the squeeze tube, and allow and empty warning device. These would be significant improvements over the prior art.
  • the foregoing is not an exhaustive list but are just further examples of the applicability of the present invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US10/436,454 2003-05-12 2003-05-12 Methods of dispensing Abandoned US20040226959A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US10/436,454 US20040226959A1 (en) 2003-05-12 2003-05-12 Methods of dispensing
PCT/US2004/012165 WO2004100756A2 (en) 2003-05-12 2004-04-20 Methods of dispensing an ingredient
CA2524169A CA2524169C (en) 2003-05-12 2004-04-20 Methods of dispensing
CN200480012860.1A CN1787771B (zh) 2003-05-12 2004-04-20 分配配料的方法
CA2762124A CA2762124C (en) 2003-05-12 2004-04-20 Methods of dispensing
JP2006532437A JP4855938B2 (ja) 2003-05-12 2004-04-20 分配方法
AU2004238211A AU2004238211B2 (en) 2003-05-12 2004-04-20 Methods of dispensing an ingredient
BRPI0410177-4A BRPI0410177A (pt) 2003-05-12 2004-04-20 métodos de distribuir um ingrediente
MXPA05012124A MXPA05012124A (es) 2003-05-12 2004-04-20 Metodos para distribuir un ingrediente.
JP2009277006A JP2010094524A (ja) 2003-05-12 2009-12-04 分配方法
AU2010212307A AU2010212307B2 (en) 2003-05-12 2010-08-12 Methods of dispensing an ingredient
US14/029,374 US9376306B2 (en) 2003-05-12 2013-09-17 Methods of dispensing

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US10/436,454 US20040226959A1 (en) 2003-05-12 2003-05-12 Methods of dispensing

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US14/029,374 Expired - Lifetime US9376306B2 (en) 2003-05-12 2013-09-17 Methods of dispensing

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JP (2) JP4855938B2 (pt)
CN (1) CN1787771B (pt)
AU (2) AU2004238211B2 (pt)
BR (1) BRPI0410177A (pt)
CA (2) CA2762124C (pt)
MX (1) MXPA05012124A (pt)
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CA2524169A1 (en) 2004-11-25
US20140017142A1 (en) 2014-01-16
US9376306B2 (en) 2016-06-28
CA2762124A1 (en) 2004-11-25
JP2010094524A (ja) 2010-04-30
WO2004100756A3 (en) 2005-05-12
AU2004238211B2 (en) 2010-09-02
CA2524169C (en) 2012-06-05
JP4855938B2 (ja) 2012-01-18
MXPA05012124A (es) 2006-02-10
BRPI0410177A (pt) 2006-05-16
JP2006528051A (ja) 2006-12-14
AU2010212307B2 (en) 2012-03-08
CN1787771A (zh) 2006-06-14
CN1787771B (zh) 2014-09-24
AU2004238211A1 (en) 2004-11-25
CA2762124C (en) 2014-01-14
WO2004100756A2 (en) 2004-11-25

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