WO2007077190A2 - Dosieranlage für eine flüssigkeit - Google Patents
Dosieranlage für eine flüssigkeit Download PDFInfo
- Publication number
- WO2007077190A2 WO2007077190A2 PCT/EP2006/070242 EP2006070242W WO2007077190A2 WO 2007077190 A2 WO2007077190 A2 WO 2007077190A2 EP 2006070242 W EP2006070242 W EP 2006070242W WO 2007077190 A2 WO2007077190 A2 WO 2007077190A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- electrode
- metered
- disinfectant
- dosing system
- 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.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/0061—Air and water supply systems; Valves specially adapted therefor
- A61C1/0076—Sterilising operating fluids or fluid supply elements such as supply lines, filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/64—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by measuring electrical currents passing through the fluid flow; measuring electrical potential generated by the fluid flow, e.g. by electrochemical, contact or friction effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
- G01F1/708—Measuring the time taken to traverse a fixed distance
- G01F1/7088—Measuring the time taken to traverse a fixed distance using electrically charged particles as tracers
Definitions
- the invention relates to a metering system for a liquid with a control unit, wherein the metering system has a control unit via the control mixing valve, via which the liquid is metered.
- the disinfection system is usually composed of a mixing container, which is separated according to the regulation over an air gap from the drinking water network and which is filled with a predefined volume of water and the same time a certain amount of disinfectant is added. With the water thus treated, the respective consumers of this treatment unit are then supplied via a pump.
- the disinfectant is in a housing part and is supplied via a valve as needed to the mixing container.
- the disinfectant is usually added time-controlled.
- the object of the invention is to design and arrange a dosing system in such a way that an accurate, proper dosage on the one hand and feedback on the metered amount on the other hand is guaranteed.
- the dosing system for a liquid comprises a mixing valve controlled by a control unit, via which the liquid can be metered from a storage container.
- a sensor through which the liquid flows to detect the metered liquid is provided, which has a first electrode and at least one second electrode.
- At least one electrode is designed as a pipe section through which the liquid to be metered flows, wherein the flow cross section of the electrode is selected such that it remains filled with liquid when the mixing valve is closed or after closing due to capillary forces , The resulting change in the electrical resistance between the two electrodes is detected with the liquid contact and thus the dosing is determined for itself and the metered amount of liquid.
- the electrical contact between the two electrodes is achieved by the liquid flowing through in that the liquid is electrically conductive and forms a continuous liquid column.
- This liquid column thus forms a kind of conductor between the two electrodes, whereby the resistance between the two electrodes is reduced.
- the liquid can remain in the respective electrode, on the other hand, at least the lower pipe section is used for collecting or introducing the liquid in free fall between the two electrodes.
- the capillary action dependent on the surface tension of the liquid and the pipe section used, ensures that, if the pipe cross-section is sufficiently small, the liquid at the lower end of the pipe section does not escape on its own. The pipe section thus remains filled after closure of the mixing valve.
- the liquid After opening the mixing valve, the liquid flows out from the lower open end of the pipe section and after some time reaches the second electrode, whereby a contact is made.
- the leaked until then from the pipe section amount of liquid is constant, neglecting the Grep-level of the liquid volume.
- the level of the liquid volume has only an effect on the exit velocity of the liquid and is negligible for the purposes of this invention.
- the volume of the liquid to be metered can be determined with sufficient accuracy.
- a faulty function of the dosing be determined if, despite actuation of the valve no disinfecting liquid flows through between the two electrodes. An additional additional timer or a liquid sensor are not necessary.
- the delivered volume of the liquid flowing through can be determined from the cross section of the liquid column, the exit velocity and the distance S.
- the volume of the liquid column with the height S between the two electrodes represents the smallest meterable and reproducible volume. Accordingly, it can also be measured once for the purpose of determination in the context of a default.
- both electrodes flat and to guide the liquid over a separate pipe, wherein the two electrodes are arranged in each case such that they are connected to each other via the formed as a liquid jet conductor.
- At least one electrode may have a funnel-shaped inlet opening for metered liquid.
- the lower electrode may be funnel-shaped, so that they absorb the free-falling liquid jet without significant losses and forward or can deliver to the mixing vessel.
- the electrode for the purpose of detecting the change in electrical resistance via control lines to the control unit can be connected by measurement.
- the control unit is used to evaluate the determined electrical resistance values for the purpose of calculating the metered volume of liquid.
- At least one display means may be provided, which provides information about the type and / or the amount of the done dosage. Via the display means can be controlled whether by pressing the Mixing valves disinfectant was ever delivered and in what amount this was metered. In that regard, the proper condition of the liquid supplied to the medical treatment center for the treatment of the patient, which must contain a prescribed amount of disinfectant, is better controllable.
- the distance S between the first electrode and the second electrode may be variable in order to change the volume of liquid to be dispensed.
- the first electrode and / or the second electrode are mounted so as to be movable or adjustable relative to one another, at least with regard to their vertical position. The adjustment of the amount to be metered is preferably carried out before the metering, so that the desired amount is dispensed per metering operation.
- a treatment unit with a fillable mixing container for metered liquid and water comprises a disinfectant system with a reservoir for disinfectants.
- the disinfectant system includes the dosing system according to the invention.
- the mixing valve is opened via the control unit, so that the liquid exits from the first electrode and after a predetermined fall distance S enters the second electrode arranged at a distance S.
- the mixing valve is closed via the control unit.
- a defined amount of liquid is delivered.
- the above steps are repeated as needed until the desired total amount of liquid is dispensed. Only when sufficient liquid flows out does it come to the aforementioned contact between the two electrodes. Otherwise, the mixing valve remains open. The requested dosage can not be confirmed. In this case, it may be advantageous for the distance S between the first electrode and the second electrode to be changed in order to change the volume of liquid to be dispensed.
- the amount of liquid volume to be dispensed once can thus be adapted to the boundary conditions, such as the size of the mixing container.
- the total volume of fluid is determined by the number of delivery cycles. Depending on the variation of the distance S or the individual volume, a single delivery without repetitions is possible.
- the change in the electrical resistance resulting from the electrical contacting of the two electrodes by the liquid is detected by the control unit, whereby the resulting from the flow area of the electrode and the distance S amount of dosed liquid is detected ,
- the liquid conductivity is determined and from this the type of liquid is determined.
- the state or the concentration of the liquid used can also be evaluated by means of the conductivity value determination.
- FIG. 1 is a schematic diagram of a medical treatment unit according to the invention
- FIG. 2 is a sectional view of the metering system according to the invention in the first embodiment
- Fig. 3 is a perspective view of a dosing in the second embodiment.
- a treatment unit 1 shown in FIG. 1 has a disinfectant system 2 with a metering system 3 and a mixing container 4 and a water connection 5 with a control valve 6.
- the mixing vessel 4 the water removed from the water connection 5 is mixed with a disinfectant 7 'dosed via the disinfectant system 3. Via a pump 8, this mixture is provided to the respective consumers, not shown.
- the mixing container 4 has two level sensors 9, 10, which report the high and the low.
- an overflow 11 is provided.
- the disinfectant system 2 has, in addition to the dosing system 3, a preferably arranged above reservoir 12 for disinfectant 7 with a level sensor 13 and a filler neck 14.
- the disinfectant 7 is discharged via a mixing valve 15 to a sensor 16 and via this to the mixing container 4.
- Both the mixing valve 15 and the sensor 16 are connected via control lines 17, 17 ', 18, 18' with a control eratti 19 electrically connected, in which a display means 19.1 is present.
- the sensor 16 has an upper electrode 20 in the form of a pipe section and a second funnel-shaped electrode 21 arranged at a distance S below it.
- the mixing valve 15 opens, the disinfectant 7 flows through the upper electrode 20, emerges from it and, after the falling distance S, strikes or passes through the lower funnel-shaped electrode 21.
- the two electrodes 20, 21 are electrically connected in this way via the disinfectant 7 in the form of a liquid column 7 ', so that the control unit 19 detects and evaluates the associated change in the electrical resistance between the two electrodes 20, 21.
- the amount of dosed disinfectant 7 is determined.
- the mixing valve 15 By repeatedly opening and closing the mixing valve 15 upon impact of the disinfectant 7 in the form of a liquid column 7 'on the lower electrode 21, a desired amount is delivered.
- the senor 16 has a sensor housing 22 with a funnel-shaped inner cross-section, at the upper end of which the first electrode 20 and at the lower end of which the second electrode 21 is provided. Both electrodes 20, 21 are formed as a pipe section.
- the upper electrode 20 is pressed by means of a spring washer 23 to an electrical connection 24 and in a corresponding manner the lower electrode 21 is pressed via a spring washer 25 to a further electrical connection 26.
- the spring washers 23, 25 are arranged between the housing 22 and in each case a collar 27, 28 of the electrodes 20, 21, wherein the electrodes 20, 21 are secured in the housing 22.
- the housing 22 itself consists of an electrically insulating material and is closed at the upper end with a plug 29.
- the disinfectant 7 flows through the upper electrode 20 and exits therefrom via an outlet connection 20.1. Subsequently, the disinfectant 7 'falls in free fall through the sensor housing 22 and is passed in the lower part through the funnel-shaped configuration of the housing 22 in the lower electrode 21 and exits from this in a mixing container 4 shown in FIG.
- the sensor housing 22 also has a ventilation opening 30, which ensures unhindered inflow of the disinfectant 7 into the interior space between the two electrodes 20, 21 or an unhindered escape from it. As a result, occurring pressure differences in the interior of the sensor housing 22 are compensated for the external pressure.
- a hose 31 is attached, which leads to the mixing valve 15 shown in Fig. 1.
- the senor 16 is designed as an attachment for the mixing container 4.
- the first, upper electrode 20 is formed as a pipe section and protrudes through the plug 29 therethrough.
- At the upper end of the electrode 20 of the hose 31 is shown only schematically attached.
- electrical Terminal 24 is provided, which is connected via the only schematically illustrated line 18 with the controller 19 shown in FIG.
- the second, lower electrode 21 is held in the plug 29, but projects through it and is arranged at a horizontal distance from the first electrode 20, wherein the two electrodes 20, 21 are electrically isolated from each other.
- the electrode initially runs approximately parallel to the direction of fall of the disinfectant 7 'emerging from the first electrode 20 and then projects below the first electrode 20 by means of an angled section 21.1.
- the disinfectant 7 emerging from the first electrode 20 at the outlet connection 20.1 'then applies after covering the drop distance S on the angled portion 21.1, which causes a change in the electrical conductivity.
- This change can be evaluated via the line 18 'shown only schematically by the controller 19 shown in FIG. 1, in that the electrical contacting formed via the disinfectant 7 in the form of a liquid column 7' and the associated change in resistance between the two electrodes 20, 21 is detected.
- a downwardly directed drainage nose 21.2 is provided at the end of the electrode.
- the mixing valve 15 is opened via the control unit 19 (FIG. 1) and releases the disinfectant 7. This flows from the reservoir 12 through the sensor 16 into the mixing tank 4.
- the sensor 16 consists of two electrodes 20 and 21, which are separated by an air gap of length S from each other.
- the Disinfectant 7 flows over the electrode 20 and falls in the form of a liquid column 7 'on the electrode 21.
- Via the control unit 19, the electrical connection between the first electrode 20 and the second electrode 21 is registered in the form of an electrical resistance change.
- the mixing valve 15 is closed and the liquid column 7 'tears off at the outlet of the first electrode 20.
- the flow cross-section between the mixing valve 15 and the first electrode 20 is favorably chosen so that the disinfectant 7 remains in the resting state by the capillary action and does not leak.
- the distance S between the first electrode 20 and the second electrode 21 and the flow diameter of the first electrode 20 or its outlet nozzle 20. 1 define a volume of liquid or disinfectant volume which is added to the water in the mixing container 4.
- the distance S is determined such that a liquid column 7 'is formed, which is not interrupted.
- the sensor 16 can also detect this leakage flow in the case of an amount which leads to a continuous liquid column 7 '.
- the type of disinfectant 7 can be detected by determining the liquid conductance value.
Landscapes
- Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Dentistry (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Accessories For Mixers (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06841641A EP1969321A2 (de) | 2005-12-30 | 2006-12-28 | Dosieranlage für eine flüssigkeit |
| JP2008547968A JP5162470B2 (ja) | 2005-12-30 | 2006-12-28 | 液体用注入装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005063154.1 | 2005-12-30 | ||
| DE102005063154A DE102005063154B4 (de) | 2005-12-30 | 2005-12-30 | Dosieranlage für eine Flüssigkeit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007077190A2 true WO2007077190A2 (de) | 2007-07-12 |
| WO2007077190A3 WO2007077190A3 (de) | 2007-11-01 |
Family
ID=38169806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/070242 Ceased WO2007077190A2 (de) | 2005-12-30 | 2006-12-28 | Dosieranlage für eine flüssigkeit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1969321A2 (de) |
| JP (1) | JP5162470B2 (de) |
| DE (1) | DE102005063154B4 (de) |
| WO (1) | WO2007077190A2 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115306A (ja) * | 2008-11-12 | 2010-05-27 | Morita Mfg Co Ltd | バキューム管路洗浄装置及びこれを用いた歯科用診療装置 |
| MD411Z5 (ro) * | 2010-10-21 | 2012-03-31 | Институт Сельскохозяйственной Техники "Mecagro" | Instalaţie de dozare continuă a lichidului (variante) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6713243B2 (en) | 2000-03-31 | 2004-03-30 | Fuji Photo Film Co., Ltd. | Silver halide photosensitive material |
| WO2020222112A1 (en) | 2019-04-29 | 2020-11-05 | Kesem Health Pty Ltd. | A method and a system for measuring instantaneous inflow rate of urine |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB582155A (en) * | 1945-03-06 | 1946-11-06 | Aluminium Plant & Vessel Co | Improvements in or relating to liquid measuring or metering devices |
| EP0084185A1 (de) * | 1982-01-15 | 1983-07-27 | Gist-Brocades N.V. | Verfahren zur Messung von Gasmengen und zur Abgabe vorherbestimmter Flüssigkeitsmengen und Vorrichtungen zur Durchführung dieser Verfahren |
| DD257115A1 (de) * | 1987-01-12 | 1988-06-01 | Ingbuero F Landtechnik | Stroemungssignalgeber |
| DE3926630A1 (de) * | 1989-08-11 | 1991-02-21 | Wolf Gmbh Richard | Messeinrichtung zur durchflussmessung von koerperfluessigkeit |
| DE4018254A1 (de) * | 1990-06-07 | 1991-12-12 | Braun Melsungen Ag | Stroemungswaechter |
| JPH0943038A (ja) * | 1995-08-01 | 1997-02-14 | Fuji Photo Film Co Ltd | 液体の計量添加装置及び計量添加方法 |
| JP2000317298A (ja) * | 1999-05-13 | 2000-11-21 | Shibaura Mechatronics Corp | 処理液の調合装置及び洗浄処理装置 |
| FI113521B (fi) * | 2000-11-08 | 2004-05-14 | Planmeca Oy | Menetelmät hammashoitokoneen vesilinjojen desinfioimiseksi ja hammashoitokoneen vesilinjojen desinfiointijärjestelyt |
| JP4159034B2 (ja) * | 2003-01-10 | 2008-10-01 | 株式会社ニットク | 飲料液提供テーブル |
| US6931943B1 (en) * | 2004-04-30 | 2005-08-23 | Medtronic, Inc. | Permanent magnet flowmeter with noncircular sensing passage |
-
2005
- 2005-12-30 DE DE102005063154A patent/DE102005063154B4/de not_active Expired - Fee Related
-
2006
- 2006-12-28 JP JP2008547968A patent/JP5162470B2/ja active Active
- 2006-12-28 WO PCT/EP2006/070242 patent/WO2007077190A2/de not_active Ceased
- 2006-12-28 EP EP06841641A patent/EP1969321A2/de not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115306A (ja) * | 2008-11-12 | 2010-05-27 | Morita Mfg Co Ltd | バキューム管路洗浄装置及びこれを用いた歯科用診療装置 |
| MD411Z5 (ro) * | 2010-10-21 | 2012-03-31 | Институт Сельскохозяйственной Техники "Mecagro" | Instalaţie de dozare continuă a lichidului (variante) |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005063154A1 (de) | 2007-07-12 |
| DE102005063154B4 (de) | 2010-10-07 |
| WO2007077190A3 (de) | 2007-11-01 |
| EP1969321A2 (de) | 2008-09-17 |
| JP2009522083A (ja) | 2009-06-11 |
| JP5162470B2 (ja) | 2013-03-13 |
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