CA2349380C - Method and device for detecting the quantity of a product dissolved in a solution flow - Google Patents
Method and device for detecting the quantity of a product dissolved in a solution flow Download PDFInfo
- Publication number
- CA2349380C CA2349380C CA002349380A CA2349380A CA2349380C CA 2349380 C CA2349380 C CA 2349380C CA 002349380 A CA002349380 A CA 002349380A CA 2349380 A CA2349380 A CA 2349380A CA 2349380 C CA2349380 C CA 2349380C
- Authority
- CA
- Canada
- Prior art keywords
- product
- concentration
- conductivity
- solution
- pulse
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
-
- 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
- A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
-
- 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
- B01F35/2133—Electrical conductivity or dielectric constant of the mixture
-
- 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
- B01F35/82—Forming a predetermined ratio of the substances to be mixed by adding a material to be mixed to a mixture in response to a detected feature, e.g. density, radioactivity, consumed power or colour
-
- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/08—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid which is flowing continuously
-
- 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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/30—Variation of electrical, magnetical or optical quantities
-
- 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
-
- 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
- D06F2105/58—Indications or alarms to the control system or to the user
-
- 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
- D06F2105/62—Stopping or disabling machine operation
Abstract
The invention relates to a method for detecting the quantity of a product (P), preferably in paste or powder form, dissolved in a solution flow of known flow rate and unknown and/or variable concentration. Said universal method, which can be used with different con-trol and evaluation units, is character-ized by the following steps: a) cyclic measurement of the solution's (L) con-ductance; b) determination of the con-centration of the solution (L) by com-parison of the conductance measured with conductance/concentration charac-teristic curves (4a) stored in a data memory; c) calculation of the quantity of product from the product concen-tration determined in this way and the known flow rate; and d) addition of the calculated product quantity and generation of a pulse (7) as soon as a settable product quantity is reached. The invention also relates to a device for carrying out the above method.
Description
Method and Device for detecting the quantity of a product dissolved in a solution flow The invention relates to a method for detecting of the quantity of a product, preferably in paste or powder form, dissolved in a solution flow of known flow rate and unknown, variable concentration. In addition, the invention relates to a device for carrying out this method.
Various meters, for example, impeller wheel meters, oval wheei meters and turbine meters, are known in practice for detecti.on of the throughflow quantity or admetering quantity of liquid products in a fixed and constant mixture ratio. The detection of products, for example of pasty or pulverulent consistency, dissolved in water is possible by these meters only if a fixed and constant mixture ratio is maintained. These known meters are not suitable for detection of the quantity of a product dissolved in a solution flow of known flow rate, but unknown, variable concentration, as the throughflow quantities measured by them do not allow any conclusions to be drawn about the concentration of the product in the solution flow.
For ascertaining the concentration of a product dissolved in a sotution flow it is known in practice to determine the product concentration in the solution flow by means of conductivity measurements. For example, there is known from EP 0 229 038 B1 a method of dispensing a predetermined quantity of a chemical in a solution of unknown or variable concentration, in which the determination of the product concentration in the solution flow is carried out by means of conductivity measurements and temperature measurement.
The product quantity dissolved in the solution flow is subsequently computed from the measured conductivity and temperature values in a computer by reference to known conductivity characteristic curves for the respective product. The computed dissolved product quantities are summated and compared with the maximum product quantity necessary for the method. As soon as the product quantity ascertained on the basis of the conductivity measurements corresponds with the product quantity which may, at most, be consumed in the method to be controlled, the solution flow is interrupted.
Thus, it is possible with this known method to perform quantity detection and admetering of a product for a specific purpose of use. The admetering on the basis of comparison of the respectively ascertained product quantities with a predetermined maximum product quantity and the obligatory temperature measurement for compensation for temperature-induced fluctuations in conductivity is very complicated in practice for this known method and in each instance can be used only with a defined, integrated specific control.
Various meters, for example, impeller wheel meters, oval wheei meters and turbine meters, are known in practice for detecti.on of the throughflow quantity or admetering quantity of liquid products in a fixed and constant mixture ratio. The detection of products, for example of pasty or pulverulent consistency, dissolved in water is possible by these meters only if a fixed and constant mixture ratio is maintained. These known meters are not suitable for detection of the quantity of a product dissolved in a solution flow of known flow rate, but unknown, variable concentration, as the throughflow quantities measured by them do not allow any conclusions to be drawn about the concentration of the product in the solution flow.
For ascertaining the concentration of a product dissolved in a sotution flow it is known in practice to determine the product concentration in the solution flow by means of conductivity measurements. For example, there is known from EP 0 229 038 B1 a method of dispensing a predetermined quantity of a chemical in a solution of unknown or variable concentration, in which the determination of the product concentration in the solution flow is carried out by means of conductivity measurements and temperature measurement.
The product quantity dissolved in the solution flow is subsequently computed from the measured conductivity and temperature values in a computer by reference to known conductivity characteristic curves for the respective product. The computed dissolved product quantities are summated and compared with the maximum product quantity necessary for the method. As soon as the product quantity ascertained on the basis of the conductivity measurements corresponds with the product quantity which may, at most, be consumed in the method to be controlled, the solution flow is interrupted.
Thus, it is possible with this known method to perform quantity detection and admetering of a product for a specific purpose of use. The admetering on the basis of comparison of the respectively ascertained product quantities with a predetermined maximum product quantity and the obligatory temperature measurement for compensation for temperature-induced fluctuations in conductivity is very complicated in practice for this known method and in each instance can be used only with a defined, integrated specific control.
2 Having regard thereto the invention is based on the technical problem of providing a method for detection of the quantity of a product dissolved in a solution flow of known flow rate and unknown, variable concentration, which method processes and delivers the detected quantity in such a form that the method can be used in variable manner and applied to discrete, different control and evaluating units and is usable in this way. In addition, the invention has the object of providing a device for carrying out this method.
The fulfilment of this object in terms of method is characterised by the following steps:
a) cyclic measurement of the conductivity of the solution;
b) determination of the concentration of the solution by comparison of the measured conductivity with conductivity/concentration characteristic curves stored in a data store;
c) calculation of the product quantity from the ascertained product concentration of the solution and the known flow rate; and d) summation of the calculated product quantities and generation of a pulse as soon as a presettable product quantity is reached.
Figure 1 schematically illustrates a method according to one embodiment of the invention.
The method according to the invention is distinguished by the fact that no comparison of the ascertained product quantity with a predetermined product quantity or product concentration takes place, but instead thereof a pulse is generated by a pulse transmitter per calculated product quantity. The generated pulses are passed on as a pulse train to commercially available forms of control and output unit. The pulse train is comparable with the result in the case of product detection by means of a normal meter. The product quantity necessary to generate a pulse can be freely predetermined in the computer for each purpose of use. Through use of this simple pulse transmitter, which issues the pulses as a pulse train like a normal meter, the outlay on equipment for performance of this method is small.
The measurement and calculation results can be improved, in accordance with a preferred embodiment of the invention, if in step b) a temperature compensation is additionally included in the calculation, as the conductivity of a product is very strongly dependent on temperature and the stored conductivity/concentration characteristic curves are filed in the data store only for some selected temperatures. The including of the temperature compensation is advantageously carried out in accordance with the following formula known from conductometry:
JUN-21-2001 17: 35 ADAMS CASSICA 02349380 2001-04-30 1 613 828 0024 P.06i09 .
The fulfilment of this object in terms of method is characterised by the following steps:
a) cyclic measurement of the conductivity of the solution;
b) determination of the concentration of the solution by comparison of the measured conductivity with conductivity/concentration characteristic curves stored in a data store;
c) calculation of the product quantity from the ascertained product concentration of the solution and the known flow rate; and d) summation of the calculated product quantities and generation of a pulse as soon as a presettable product quantity is reached.
Figure 1 schematically illustrates a method according to one embodiment of the invention.
The method according to the invention is distinguished by the fact that no comparison of the ascertained product quantity with a predetermined product quantity or product concentration takes place, but instead thereof a pulse is generated by a pulse transmitter per calculated product quantity. The generated pulses are passed on as a pulse train to commercially available forms of control and output unit. The pulse train is comparable with the result in the case of product detection by means of a normal meter. The product quantity necessary to generate a pulse can be freely predetermined in the computer for each purpose of use. Through use of this simple pulse transmitter, which issues the pulses as a pulse train like a normal meter, the outlay on equipment for performance of this method is small.
The measurement and calculation results can be improved, in accordance with a preferred embodiment of the invention, if in step b) a temperature compensation is additionally included in the calculation, as the conductivity of a product is very strongly dependent on temperature and the stored conductivity/concentration characteristic curves are filed in the data store only for some selected temperatures. The including of the temperature compensation is advantageously carried out in accordance with the following formula known from conductometry:
JUN-21-2001 17: 35 ADAMS CASSICA 02349380 2001-04-30 1 613 828 0024 P.06i09 .
3 Xg = X,, 1 + aZ5/100 ' (S - 25)]
wherein:
Xd, = conductance value at measured temperature, X2, ~ conductance value at 25 C, a25 = temperature coefficient of the product to be measured, and S = measured temperature.
In an advantageous variant of the method the water throughflow is limited. The magnitudes influencing the conductance value are thereby minimised. Since merely the conductance value, optionally with temperature compensation, is utilised for determination of the metered quantity, the accuracy of the determination is thereby increased.
In order to be able to also ascertain with sufficient accuracy the quantities of products without conductivity/concentration charactetistic curves stored in the data store, in accordance with a further embodiment of the invention a correction factor for determination of the concentration of these products is included in the calculation in method step b)_ The device for canying out the method according to the invention is characteris,ed by a pulse transmitter, which is connected with the computer, for generating count pulses per predetermined product quantity and by a pulse counter connected with the pulse transmitter. Apart from the at least one conductivity measuring cell and the computer with permanent data store, in order to provide a device able to be connected to the most diverse fomis of control and evaluating unit it is simply necessary in the case of this device according to the invention to provide, as a further component, a pulse transmitter which for preference is similarly realised within the computer.
Further features and advantages of the invention are evident from the following description of the accompanying drawing, in which the sequence of the method according to the invention is schematically illustrated.
A solution L of unknown, variable concentration is prepared in metering apparatus I
starting from a solvent LM, for example water, and a product P of preferably pasty or pulveruient consistency. For detection and detemiination of the quantity of dissolved JUN-21-2001 17:36 ADAMS CRSSFCA 02349380 2001-04-30 1 613 828 0024 P.07/09
wherein:
Xd, = conductance value at measured temperature, X2, ~ conductance value at 25 C, a25 = temperature coefficient of the product to be measured, and S = measured temperature.
In an advantageous variant of the method the water throughflow is limited. The magnitudes influencing the conductance value are thereby minimised. Since merely the conductance value, optionally with temperature compensation, is utilised for determination of the metered quantity, the accuracy of the determination is thereby increased.
In order to be able to also ascertain with sufficient accuracy the quantities of products without conductivity/concentration charactetistic curves stored in the data store, in accordance with a further embodiment of the invention a correction factor for determination of the concentration of these products is included in the calculation in method step b)_ The device for canying out the method according to the invention is characteris,ed by a pulse transmitter, which is connected with the computer, for generating count pulses per predetermined product quantity and by a pulse counter connected with the pulse transmitter. Apart from the at least one conductivity measuring cell and the computer with permanent data store, in order to provide a device able to be connected to the most diverse fomis of control and evaluating unit it is simply necessary in the case of this device according to the invention to provide, as a further component, a pulse transmitter which for preference is similarly realised within the computer.
Further features and advantages of the invention are evident from the following description of the accompanying drawing, in which the sequence of the method according to the invention is schematically illustrated.
A solution L of unknown, variable concentration is prepared in metering apparatus I
starting from a solvent LM, for example water, and a product P of preferably pasty or pulveruient consistency. For detection and detemiination of the quantity of dissolved JUN-21-2001 17:36 ADAMS CRSSFCA 02349380 2001-04-30 1 613 828 0024 P.07/09
4 product P contained in the solution flow, which is of known flow rate, the solution L flows through a conductivity measuring cell 2 connected by way of a oonductor line 3 with a computer 4. The computer includes a permanent data store.
Conductivity/concentration characteristic curves 4a of different products are stored in this permanent data store.
From the conductance value, which is ascertained by the conductivity measuring cell 2, of the product L to be investigated, the concentration of the product P in the solution L is determined by reference to the characteristic curve 4a belonging to the product P
contained in the solution L. The quantity of the product P delivered from the admetering apparatus I is calculated from the ascertained concentration on the basis of the known flow rate of the solution L The calculated product quantities are summated in the computer 4 and communicated by way of a conductor line 5 to a pulse transmitter 6 whenever a freely presettable product quantity is reached. The pulses 7 generated by the pulse transmitter 6 per product quantity are counted by a pulse counter 8 connected with the pulse transmitter 6.
For improvement in the measurement or calcula6on results it is in addition possible to supply a temperature T to the computer 4 as a further computation magnitude.
The temperature compensation connected therewith serves the purpose of taking into account the different conductance values of the product at changing temperatures.
Moreover, it is possible to supply a correction factor K to the computer 4 in order to be able to ascertain with sufficient accuracy even the quantities of products P without characteristic curves stored in the data store of the computer 4.
Altogether, the method described in the foregoing is thus distinguished by the fact that it is universally connectible to the most diverse forms of control and evaluating unit.
JUN-21-2001 17:36 ADAMS CASSICA 02349380 2001-04-30 1 613 828 0024 P. 08i09 Reference Numeral Ust:
1 metering apparatus 2 conductivity measuring cell 3 conductor line 4 computer 4a characteristic curve
Conductivity/concentration characteristic curves 4a of different products are stored in this permanent data store.
From the conductance value, which is ascertained by the conductivity measuring cell 2, of the product L to be investigated, the concentration of the product P in the solution L is determined by reference to the characteristic curve 4a belonging to the product P
contained in the solution L. The quantity of the product P delivered from the admetering apparatus I is calculated from the ascertained concentration on the basis of the known flow rate of the solution L The calculated product quantities are summated in the computer 4 and communicated by way of a conductor line 5 to a pulse transmitter 6 whenever a freely presettable product quantity is reached. The pulses 7 generated by the pulse transmitter 6 per product quantity are counted by a pulse counter 8 connected with the pulse transmitter 6.
For improvement in the measurement or calcula6on results it is in addition possible to supply a temperature T to the computer 4 as a further computation magnitude.
The temperature compensation connected therewith serves the purpose of taking into account the different conductance values of the product at changing temperatures.
Moreover, it is possible to supply a correction factor K to the computer 4 in order to be able to ascertain with sufficient accuracy even the quantities of products P without characteristic curves stored in the data store of the computer 4.
Altogether, the method described in the foregoing is thus distinguished by the fact that it is universally connectible to the most diverse forms of control and evaluating unit.
JUN-21-2001 17:36 ADAMS CASSICA 02349380 2001-04-30 1 613 828 0024 P. 08i09 Reference Numeral Ust:
1 metering apparatus 2 conductivity measuring cell 3 conductor line 4 computer 4a characteristic curve
5 conductor line
6 pulse generator
7 pulse
8 pulse counter LM solvent P product L solution T temperature compensation K correction factor
Claims (5)
1. Method for detecting the quantity of a product (P), in paste or powder form, dissolved in a solution flow of a known flow rate and an unknown or variable concentration, with the method steps of:
(a) cyclically measuring the conductivity of the solution (L);
(b) determining the concentration (L) by matching the conductivity measured in step (a) conductivity/concentration characteristics (4a) stored in a data memory, (c) calculating the product quantity from the determined concentration of the solution (L) and the known flow rate, (d) summating the calculated product quantities, (e) prescribing a specific referenced product quantity as a comparison for the product quantities calculated by summation, (f) generating a pulse each time, and as soon as the reference product quantity has been reached by summation of the calculated product quantities, (g) evaluating the series of pulses generated in method step (f) by counting down the pulses in some kind of control and evaluation unit;
(h) interrupting the solution flow as soon as the number of counted pulses shows that the maximum necessary product quantity has been metered.
(a) cyclically measuring the conductivity of the solution (L);
(b) determining the concentration (L) by matching the conductivity measured in step (a) conductivity/concentration characteristics (4a) stored in a data memory, (c) calculating the product quantity from the determined concentration of the solution (L) and the known flow rate, (d) summating the calculated product quantities, (e) prescribing a specific referenced product quantity as a comparison for the product quantities calculated by summation, (f) generating a pulse each time, and as soon as the reference product quantity has been reached by summation of the calculated product quantities, (g) evaluating the series of pulses generated in method step (f) by counting down the pulses in some kind of control and evaluation unit;
(h) interrupting the solution flow as soon as the number of counted pulses shows that the maximum necessary product quantity has been metered.
2. Method according to claim 1, characterized in that in method step (b) a temperature compensation (T) is included in the calculation.
3. Method according to claim 1 or 2, characterized in that the quantity of water flowing through is limited.
4. Method according to any one of claims 1 to 3, characterized in that in method step (b) a correction factor (K) for determining the concentration of products of which no characteristics are stored in the data memory is additionally included in the calculation.
5. Device for carrying out a method according to any one of claims 1 to 4, with at least one conductivity measuring cell and a computer with a permanent data memory with conductivity/concentration characteristics stored in it for the evaluation of the values measured by the conductivity measuring cell, a pulse generator, connected to the computer, for generating a pulse for each reference product quantity achieved and a pulse counter of some kind of control and evaluation unit, connected to the pulse generator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19852164A DE19852164A1 (en) | 1998-11-12 | 1998-11-12 | Method and device for detecting the quantity of a product dissolved in a solution stream |
| DE19852164.2 | 1998-11-12 | ||
| PCT/EP1999/008384 WO2000028879A1 (en) | 1998-11-12 | 1999-11-03 | Method and device for detecting the quantity of a product dissolved in a solution flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2349380A1 CA2349380A1 (en) | 2000-05-25 |
| CA2349380C true CA2349380C (en) | 2008-09-23 |
Family
ID=7887539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002349380A Expired - Lifetime CA2349380C (en) | 1998-11-12 | 1999-11-03 | Method and device for detecting the quantity of a product dissolved in a solution flow |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1128760B1 (en) |
| AT (1) | ATE349180T1 (en) |
| AU (1) | AU1550700A (en) |
| CA (1) | CA2349380C (en) |
| DE (2) | DE19852164A1 (en) |
| ES (1) | ES2277453T3 (en) |
| NO (1) | NO20012340L (en) |
| PL (1) | PL347637A1 (en) |
| WO (1) | WO2000028879A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10103091A1 (en) * | 2001-01-24 | 2002-08-01 | Ecolab Gmbh & Co Ohg | Process for producing, conveying and metering a solution and device for carrying out the process |
| US8012421B2 (en) * | 2003-06-24 | 2011-09-06 | Ecolab Inc. | Concentration monitor |
| DE10354140A1 (en) * | 2003-11-19 | 2005-06-23 | Miele & Cie. Kg | Method for determining a quantity of cleaner or its volume flow and program-controlled dishwasher for carrying out such a method |
| DK2042837T3 (en) * | 2007-09-26 | 2020-03-30 | Kamstrup As | Meter for communication on a communication line |
| DE102011006176B4 (en) | 2011-03-25 | 2015-03-12 | Judo Wasseraufbereitung Gmbh | Method for operating a metering pump and associated metering device |
| EP2959819B1 (en) * | 2014-06-24 | 2017-12-13 | Electrolux Appliances Aktiebolag | Method for operating a washing appliance and washing appliance implementing the same |
| US11225746B2 (en) | 2018-08-27 | 2022-01-18 | Ecolab Usa Inc. | System and technique for extracting particulate-containing liquid samples without filtration |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858449A (en) * | 1986-01-09 | 1989-08-22 | Ecolab Inc. | Chemical solution dispenser apparatus and method of using |
| US5478537A (en) * | 1992-09-24 | 1995-12-26 | Sunburst Chemicals, Inc. | Detergent dispenser for use with solid casting detergent |
| US5500050A (en) * | 1994-07-15 | 1996-03-19 | Diversey Corporation | Ratio feed detergent controller and method with automatic feed rate learning capability |
| US5782109A (en) * | 1996-05-06 | 1998-07-21 | Ecolab Inc. | Dispenser |
| DE19641742A1 (en) * | 1996-10-10 | 1998-04-23 | Henkel Ecolab Gmbh & Co Ohg | Dosage of detergent pastes |
-
1998
- 1998-11-12 DE DE19852164A patent/DE19852164A1/en not_active Withdrawn
-
1999
- 1999-11-03 PL PL99347637A patent/PL347637A1/en unknown
- 1999-11-03 AT AT99957984T patent/ATE349180T1/en not_active IP Right Cessation
- 1999-11-03 CA CA002349380A patent/CA2349380C/en not_active Expired - Lifetime
- 1999-11-03 WO PCT/EP1999/008384 patent/WO2000028879A1/en active IP Right Grant
- 1999-11-03 ES ES99957984T patent/ES2277453T3/en not_active Expired - Lifetime
- 1999-11-03 EP EP99957984A patent/EP1128760B1/en not_active Expired - Lifetime
- 1999-11-03 AU AU15507/00A patent/AU1550700A/en not_active Abandoned
- 1999-11-03 DE DE59914104T patent/DE59914104D1/en not_active Expired - Lifetime
-
2001
- 2001-05-11 NO NO20012340A patent/NO20012340L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2277453T3 (en) | 2007-07-01 |
| EP1128760B1 (en) | 2006-12-27 |
| ATE349180T1 (en) | 2007-01-15 |
| PL347637A1 (en) | 2002-04-22 |
| CA2349380A1 (en) | 2000-05-25 |
| DE19852164A1 (en) | 2000-05-25 |
| WO2000028879A1 (en) | 2000-05-25 |
| NO20012340D0 (en) | 2001-05-11 |
| NO20012340L (en) | 2001-05-11 |
| DE59914104D1 (en) | 2007-02-08 |
| AU1550700A (en) | 2000-06-05 |
| EP1128760A1 (en) | 2001-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4080837A (en) | Sonic measurement of flow rate and water content of oil-water streams | |
| US20180128662A1 (en) | Method and apparatus for determining the mass of a fluid flowing through a flow rate meter in a consumption time interval | |
| US4136563A (en) | Digital volumetric flow rate measurement of a flowing fluid | |
| CA2349380C (en) | Method and device for detecting the quantity of a product dissolved in a solution flow | |
| DE69309939D1 (en) | FLOWMETER | |
| US7278325B2 (en) | Method and apparatus to measure flow rate | |
| US20070028663A1 (en) | Method for detecting corrosion, erosion or product buildup on vibrating element densitometers and coriolis flowmeters and calibration validation | |
| JP2001515200A (en) | Method and apparatus for monitoring the onset of liquid chemical vaporization | |
| EP0674154A1 (en) | Method and device for determining the flow rate of a pumped fluid | |
| WO2003010498A1 (en) | Apparatus and method for measuring enthalpy and flow rate of a mixture | |
| US20220196602A1 (en) | Measuring concentrations of mixed gases at an endpoint | |
| KR101522243B1 (en) | a gas mass flow meter program using turbine and the measuring device using thereof | |
| US3839909A (en) | Process and apparatus for determining the weight per unit volume of liquids of variable density | |
| US4177674A (en) | Spreader application rate monitoring device | |
| SU1700447A1 (en) | Method and device for measuring drop size and concentration in two-phase gas streams | |
| SU1654667A1 (en) | Model flowmetering rig | |
| RU2084827C1 (en) | Device for determination of flow rate and amount of liquid delivered by pumping unit | |
| RU2128328C1 (en) | Mass flowmeter of gas and liquid flow | |
| SU609972A1 (en) | Apparatus for calibration and testing of rotary counters and gas flowmeters | |
| SU1749176A1 (en) | Milk meter | |
| RU2279641C2 (en) | Method and device for measuring mass flow rate of gas-liquid mixture | |
| RU2178871C1 (en) | Mass flowmeter for gas-and-liquid flow | |
| JPH01288324A (en) | Liquid mixing apparatus | |
| JPH09243668A (en) | Method and device for measuring instantaneous valve of pulse signal | |
| JPS604818A (en) | Flow rate measuring apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20191104 |