EP4162856A1 - Dispositif de dosage - Google Patents

Dispositif de dosage Download PDF

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Publication number
EP4162856A1
EP4162856A1 EP22193361.7A EP22193361A EP4162856A1 EP 4162856 A1 EP4162856 A1 EP 4162856A1 EP 22193361 A EP22193361 A EP 22193361A EP 4162856 A1 EP4162856 A1 EP 4162856A1
Authority
EP
European Patent Office
Prior art keywords
medium
temperature
control unit
dosing
heating element
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.)
Pending
Application number
EP22193361.7A
Other languages
German (de)
English (en)
Inventor
Michael Saier
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.)
HERBERT SAIER GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4162856A1 publication Critical patent/EP4162856A1/fr
Pending legal-status Critical Current

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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
    • 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
    • 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
    • A47L15/006—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control using wireless communication between internal components of the machine
    • 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
    • A47L15/4418—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
    • 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
    • A47L15/449—Metering controlling devices
    • 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
    • D06F34/04—Signal transfer or data transmission arrangements
    • D06F34/05—Signal transfer or data transmission arrangements for wireless communication between components, e.g. for remote monitoring or control
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/022—Devices for adding soap or other washing agents in a liquid state
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • 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
    • 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
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/07—Consumable products, e.g. detergent, rinse aids or salt
    • 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
    • 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
    • D06F2103/16—Washing liquid temperature
    • 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
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • 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
    • D06F2105/42—Detergent or additive supply
    • 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

Definitions

  • the invention initially relates to a dosing device according to the preamble of claim 1.
  • the invention is based specifically on a metering device with the features of the preamble of claim 1, in particular of a metering device as for example in EP 2 783 142 A2 is described.
  • the object of the invention is to further develop the known dosing device in such a way that the control device is enabled to check whether a dosing process has been carried out correctly and/or that the control device is enabled to provide additional information about a carried out dosing process.
  • the invention solves this problem with the features of claim 1, in particular with those of the characterizing part, and is accordingly characterized in that the fluid line has at least one heating element and at least one temperature sensor connected to a measuring device, with the measuring device using one of the temperature sensors output measured value information about a promotion of the medium through the fluid line can be determined and transmitted to the control unit.
  • the principle of the invention essentially consists in associating at least one heating element, at least one temperature sensor and at least one measuring device with the dosing device.
  • the heating element can apply thermal energy to the medium present in the fluid line, and the at least one temperature sensor can—in particular be arranged at a distance from the heating element and—measure the temperature present there.
  • the medium e.g. B. a flushing medium
  • the medium is therefore in the fluid line and no medium funding is made, depending on the activation of the heating element on the temperature sensor, a specific temperature reading can be determined or measured.
  • the activation of the heating element can in particular take place continuously or clocked or on demand or as required or according to a predetermined principle or scheme.
  • the temperature present and measurable at the temperature sensor changes.
  • the measuring device can process and evaluate this change in the measured temperature value and determine from this information about a promotion of the medium through the fluid line.
  • This information can be transmitted from the measuring device to the control unit. As a result of the information being transmitted to the control unit, the control unit can carry out different processing steps.
  • control unit can work out a reference to the type of medium being conveyed or a reference to the conveyed quantity.
  • This information can be provided by the control unit, e.g. B. can be used to check whether the correct medium has been funded, or to make a determination as to which flow rate of medium has been funded, or to check whether the correct flow rate has been funded by the pump.
  • At least one heating element and at least two temperature sensors are provided.
  • the temperature sensors are in particular arranged symmetrically to the heating element, with a first temperature sensor being arranged downstream and a second temperature sensor being arranged upstream of the heating element.
  • the thermal energy introduced into the medium by the heating element is distributed evenly due to the symmetrical arrangement of the temperature sensors, assuming a symmetrical design of the fluid line and the components involved, so that the temperature sensors have the same or essentially the same temperature the same temperature is measured.
  • there is a particularly simple possibility of differential measurement so that the measured temperature values obtained, or at least measured values that are related to the temperature, e.g. As voltages or currents can be subtracted from each other.
  • a difference measurement determines a value of zero or almost zero, since the two values given by the temperature sensors correspond or essentially correspond to each other.
  • the temperature sensor arranged downstream of the heating element necessarily measures a different temperature than the temperature upstream of the heating element due to the heat transport associated with the fluid flow Heating element arranged temperature sensor.
  • the differential measurement then provides meaningful values that differ from zero.
  • information about a fluid transport can also be obtained if only a single temperature sensor is provided.
  • a changed measured value can be detected as a result of a fluid flow, based on a situation in which the medium is in the fluid line.
  • a particular advantage of the dosing device according to the invention is that the proposed measuring arrangement does not use any moving parts.
  • Dosing devices have become known from the prior art, in which impeller meters or oval wheel meters are used to measure fluid flows.
  • impeller meters or oval wheel meters are used to measure fluid flows.
  • moving parts here that deliver imprecise measured values, especially when using different media with different viscosities, and are also exposed to high mechanical stress, so that failures are often recorded.
  • the dosing device according to the invention is completely maintenance-free due to an arrangement of heating element and temperature sensor.
  • the measuring principle according to the invention also offers the possibility of extremely short response times.
  • the invention recognizes that, particularly when operating a dosing device that uses a peristaltic pump and in which only small dosing quantities are conveyed, very precise and rapid measurements and, as a result, very precise determinations of conveyed quantities can be achieved.
  • the dosing device according to the invention also enables a very precise and reliable determination of a type of media.
  • the measuring device or a computer unit cooperating with it or a computer unit connected downstream of it, or alternatively also the control unit processes the measured values obtained, and from the signal form, e.g. B. from the signal length, or from the signal amplitude, or from the behavior of signal rising edges, or signal falling edges, or by frequency analysis or spectral analysis, or by checking or determining periodicities, or by checking signal patterns, delay times, phase delays, etc., very precise determination of flow rates for different media and different Viscosities and very precise determinations of different types of media can be achieved.
  • the signal form e.g. B. from the signal length, or from the signal amplitude, or from the behavior of signal rising edges, or signal falling edges, or by frequency analysis or spectral analysis, or by checking or determining periodicities, or by checking signal patterns, delay times, phase delays, etc.
  • control unit can advantageously be assigned a memory in which values for different media or values for different delivery quantities or for different delivery capacities of the pump are stored.
  • the values can e.g. B. values of different signal patterns, signal forms, signal types, signal rising edges, or signal falling edges, periodicities, delay times, phase delays, signal amplitudes and other signal properties.
  • the control unit can make an assessment using the memory, e.g. B. make a comparison between the measured value and the value stored in memory and z. B. based on this assessment, z. B. due to this comparison, z. B. carry out a determination or an inspection of what type of medium has been funded and/or what flow rate of a specific medium or a type of media or class of medium has been funded.
  • the dosing device according to the invention is used for dosing and supplying media via a fluid line to at least one target device.
  • the target device can be provided, for example, by a commercial, textile washing machine or by a commercial dishwasher. However, other target devices can also be considered, to which the same or different, possibly consecutive, media must be fed regularly or irregularly.
  • the dosing device is connected on the input side to at least one container that is filled with a medium.
  • the container can, for example, comprise an access opening for a suction lance which has a hose line which can be connected to the dosing device.
  • z. B. referred to the German patent application DE 10 2020 106 712 A1 the applicant, the content of which is hereby included in the disclosure content of the present patent application for the purpose of avoiding repetition.
  • the dosing device can also be connected on the input side to a plurality of containers which are filled with the same medium or with different media.
  • the dosing device according to the invention is used for successively supplying different media to a target device.
  • EP 2 783 142 A2 the applicant, the content of which is hereby incorporated into the content of the present patent application.
  • the dosing device can be equipped with a so-called mixing distributor, which is described and disclosed in the aforesaid patent application.
  • a mixed distribution device can have an actuator that can be addressed by the control unit and that switches different communication paths, so that a specific one of the multiple containers can be connected to the target device and in this way successively different media can be fed to the target device.
  • At least one of the media can be in the form of a rinsing agent, so that a rinsing medium can be conveyed each time a medium has been conveyed in order to rinse the line paths.
  • a medium within the meaning of the present patent application is a liquid, e.g. B. highly concentrated means z. B. can be used when washing or cleaning objects or textiles, z. B. a component of a detergent, or a chemical z. B. is required as part of a washing or cleaning process. Any material can be used as a medium, such as B. in the EP2 783 142 A2 or as described in any of the other references referenced.
  • the dosing device has a control unit.
  • This can be a device that has a computer unit, e.g. B. has a microprocessor.
  • the control unit can have one or more electronic components. It can be organized centrally or decentrally.
  • the control unit can e.g. B. by prompting by a target device, z. B. cause after pressing a program selector switch on a target device and selection of a washing or cleaning program that a pump is addressed.
  • the pump can in particular be a peristaltic pump.
  • a predetermined amount of medium can be removed from the container and conveyed to the target device.
  • the invention also includes dosing devices that are connected to a number of target devices on the output side.
  • a second mixed distribution device can be provided, which includes an actuator that switches the communication paths accordingly.
  • the washing machine requests different media in different quantities from the dosing device at different points in time during the washing program.
  • the dosing device can address the actuator so that the correct communication path to the correct container is established, and then cause the pump to rotate for a predetermined period of time or a predetermined number of revolutions, a predetermined Promote amount of medium to the target device.
  • control unit can obtain information from the measuring device about the medium being conveyed through the fluid line.
  • the control unit can use this information, for example, to check whether the correct medium or the correct type or class of media has been conveyed.
  • the control unit can also or alternatively use the information to check whether the correct delivery rate has been delivered.
  • the invention also makes it possible to check whether a specific delivered volume of medium has arrived at a target device.
  • a process which is also referred to as POD (proof of delivery)
  • POD proof of delivery
  • a corresponding heating element and at least one temperature sensor can be arranged on the input side or at least upstream of a target device, in particular each target device, and a measuring device that displays the corresponding information transmitted by the control unit.
  • this information can also be transmitted to a control unit of the target device.
  • the measuring device uses a measured value output by the temperature sensor to determine information about the medium being conveyed through the fluid line.
  • the measured value output by the temperature sensor can, for example, directly include a measured temperature, or a measured variable that is related to a temperature, e.g. B. a measured voltage, a measured current or a measured resistance. It is crucial that the measured value correlates in some way with the temperature value present at the temperature sensor.
  • the wording according to which the measured value is output by a temperature sensor includes the fact that the measured value is queried directly or indirectly by a temperature sensor or is obtained directly or indirectly from the temperature sensor by the measuring device in another way.
  • At least one heating element and at least one temperature sensor are provided.
  • This wording includes embodiments in which the temperature sensor is formed integrally with the heating element, or the heating element also represents or comprises the temperature sensor at the same time.
  • a heating element can be provided which cooperates with a controller for the heating element, which ensures a constant temperature or a target temperature of the heating element. B. to keep the temperature constant, it can be determined whether medium is moving within the fluid line, and what amounts of fluid are currently being funded.
  • a heating control for the heating element can be designed in such a way that it regulates in the sense of a constant temperature, so that the heating element always maintains a constant temperature of z. 35°C. As long as the medium is in the fluid line and is not pumped, this temperature, which is higher than room temperature, can be maintained by supplying very little heating energy.
  • the type and degree of activation of the heating element can also indirectly be a measure of the fluid delivery and the amount of fluid delivery, so that the measurement of the type of activation of the heating element indirectly also provides a configuration of a temperature sensor within the meaning of the invention.
  • the heating element can also be provided together with the temperature sensor, for example, by an integrated component.
  • This can include a temperature-dependent resistor, for example.
  • such a component can be provided by an NTC (Negative Temperature Coefficient) component or by a PTC (Positive Temperature Coefficient) component.
  • NTC Negative Temperature Coefficient
  • PTC Positive Temperature Coefficient
  • Such an electronic component can also advantageously cooperate with a constant current source.
  • the voltage drop across the component can be measured and represents a measure of the temperature-dependent resistance. This measured value is therefore also a measure of its current temperature.
  • the current temperature of the electronic component depends on whether the medium surrounding the component is standing or flowing, and also depends, for example, on the heat capacity of the respective medium.
  • Information about the conveyance of medium can therefore be determined from a value of the voltage drop across the electronic component when supplied via a constant current source.
  • a pump within the meaning of the invention is in particular a device with which a fluid, in particular a liquid, can be conveyed.
  • the invention also includes dosing devices with pumps that use suction principles, e.g. B. according to the Venturi principle, work.
  • z. B. by opening a valve on a water pipe
  • z. B. by opening another valve of a media line that communicates with the water line, in the media line for the purpose of entrainment generates a negative pressure.
  • a pump is also referred to as a vacuum pump, suction pump, venturi pump or venturi nozzle, jet pump or water jet pump.
  • the measured value is based on a measured temperature or takes a measured temperature into account.
  • This embodiment enables particularly simple signal processing and a fast response time.
  • the fluid line includes a pair of temperature sensors.
  • This embodiment enables particularly good signal processing and a simple and precise measurement in order to determine that media has been conveyed or to determine what amount of medium and what type of medium has been conveyed.
  • the two temperature sensors are arranged symmetrically or essentially symmetrically relative to the heating element.
  • a first temperature sensor is arranged upstream of the heating element and a second temperature sensor is arranged downstream of the heating element.
  • the measuring device can be used to compare the values output by the two temperature sensors, in particular in the manner of a difference measurement, with the measuring device providing information about the transport of the medium through the fluid line from the comparison can be determined and transmitted to the control unit.
  • This embodiment enables particularly simple signal processing and signal evaluation. In doing so, e.g., conventional methods for processing differential measurement values that have become known in other areas of technology can be used.
  • the heating element and the temperature sensor or the pair of temperature sensors are combined to form a structural unit.
  • the structural unit has an analog output or a digital interface for a signal output.
  • the embodiment can provide for analog signal outputs to be provided in the structural unit, so that the control unit or electronics connected upstream of the control unit—or the measuring device—process these analog measured values.
  • the structural unit has a digital interface, e.g. B. has an I 2 C interface.
  • the last variant requires z. B. that a computer unit is already arranged in the structural unit, which carries out a signal processing or signal pre-processing of the measured values obtained. It can be provided, for example, that a difference measurement or a comparison measurement is already carried out in the structural unit.
  • the measuring device can also be arranged on the structural unit.
  • the structural unit can also be connected to a measuring device.
  • the structural unit has a computer unit.
  • This embodiment enables a particularly advantageous system architecture, so that the control unit can be relieved of calculation steps and a pre-calculation takes place in the structural unit.
  • the computer unit is connected to the control unit.
  • This embodiment enables very efficient signal processing to be carried out.
  • the heating element is arranged between the pump and the target device, in particular directly downstream of the pump.
  • the component can be arranged immediately downstream of the pump. This makes it possible to provide the heating element or the component as part of the dosing device and to design it integrally with the dosing device. With this positioning of the heating element or with this positioning of the component near the pump, it can also be ensured that the line paths are kept short. It is therefore z. B. no significant dilution of medium with flushing medium such. B. with water, to be feared in the measuring and detection range of the temperature sensor.
  • the heating element is arranged upstream, in particular directly upstream, of the pump, in particular downstream of an inlet of the dosing device.
  • This embodiment enables a particularly compact arrangement and integration of the heating element, in particular an integration of the component into the dosing device.
  • At least one heating element is assigned to a target device and/or that at least one heating element is assigned to the dosing device.
  • a first structural unit in particular for measuring a delivery rate, is assigned to the dosing device, and that at least a second structural unit is assigned to a target device.
  • This embodiment enables a simple system architecture to achieve particularly reliable dosing processes.
  • the first structural unit and the second structural unit are connected to the control unit.
  • a dosing device is provided with which dosing processes are designed to be particularly safe.
  • each target device is assigned a structural unit.
  • This embodiment contributes to increasing safety in dosing processes.
  • the dosing process is designed to be particularly reliable.
  • the POD signal can be processed by the control unit and/or by a control unit of a target device.
  • the POD signal can be further processed for documentation purposes.
  • the heating element and the temperature sensor are an integral part of the dosing device and/or are firmly connected to the dosing device.
  • This configuration enables a particularly compact design of the dosing device.
  • the information relates to a delivery rate.
  • control unit can use the response times of the pump, e.g. B. from the known number of revolutions of the pump for pumping the medium or from the known duty cycle of the pump, check by comparison whether the pump is working properly and has pumped the intended flow rate, or whether a recalibration or recalibration of the pump is required.
  • control unit can relate the information received to a type of medium that is already known per se to the control unit.
  • a dosing device that allows several containers to be connected on the input side may have previously obtained information manually or automatically about which medium is in which container or which medium has just been conveyed. If the dosing device receives information from the measuring device that relates to a flow rate, the control unit can, taking into account the already existing information about the type of medium, e.g. B. determine or control the flow rate of this medium exactly.
  • the information relates to a type of medium being conveyed.
  • the dosing device can control or check whether the correct medium has been conveyed.
  • control unit independently of the measuring device, provides second information about the type of material being conveyed or to be conveyed Medium receives or possesses.
  • the second piece of information is also referred to as media information.
  • the control unit can, for example, receive media information about the funded medium or medium to be funded from an operator who z. B. when connecting different containers or when filling different containers to the dosing device, information is entered at an interface as to which medium has been connected to which input of the dosing device. Such information input can of course also be automated, e.g. B. with the help of the suction lances.
  • the control unit thus has information about the medium conveyed or to be conveyed that has reached it in different ways:
  • the control unit has received initial information about the medium from the measuring device.
  • the control unit has received a second piece of information from a user or automatically when the containers or the suction lances are connected. These two items of information can be compared and processed by the control unit.
  • control unit determines in such a comparison that a check shows that the dosing process has been carried out properly, this can be documented.
  • control unit determines in a comparison that the two pieces of information contradict each other because, according to the first information available, a first type of media should have been conveyed, but according to the second information available to the control unit, this is actually due to a specific connection of a container with a specific medium to the control unit another medium should have been conveyed, the control unit can display an error or Issue or initiate a warning message or take this into account in a documentation step.
  • the information can be related to the second information with the control unit.
  • This configuration enables a large number of machining operations on the dosing device, which are used in particular to make the dosing process particularly reliable.
  • a documentation of dosing processes can, for example, be carried out or initiated by the control unit of the dosing device, with the data of the documentation being stored or temporarily stored, if necessary, and, if necessary, via an external interface, e.g. B. via the Internet, WLAN or the like, to a control panel or to an external device.
  • Dosing processes can also be documented in such a way that the control unit transmits information to a control unit of a target device that a dosing process has been successfully completed and further documentation is then initiated by the control unit of the target device.
  • the information from the control unit can be used to determine or check the functionality of the pump or to calibrate the pump.
  • z. B be checked regularly or irregularly whether the pump is working properly or whether aging processes of the dosing device, z. B. an aging-related behavior of the fluid line providing hoses, require an adjustment.
  • control unit when the determination is carried out or when the check is carried out or when the documentation is carried out, the control unit also receives second information about a type or a delivery quantity of the medium and/or third information about a density of the medium Medium and / or fourth information about a viscosity of the medium and / or a temperature of the medium can be used.
  • This refinement enables a particularly reliable process control.
  • the pump is provided by a peristaltic pump.
  • a signal detected by the measuring device is subject to a pulsation that can be detected and/or recognized and/or processed and/or evaluated by the measuring electronics.
  • This embodiment recognizes that pulsations occur in the flow behavior of the pumped fluid, particularly in peristaltic pumps, and the pulsations in the measurement signal can be made visible by means of the dosing device according to the invention due to the short response times.
  • this embodiment recognizes that the pulsations contained in the signal allow a statement to be made about the conveyed quantities and/or also a statement about the type of medium conveyed.
  • control unit can be used to determine the type of medium being conveyed and/or the medium being conveyed, taking into account differences in the pulsations of the signal when using different media.
  • control unit is assigned a memory in which values, e.g. B. Calibration values, comparison values or signal patterns for different media and/or for different flow rates or pump capacities of the pump and/or for flushing media such as water and/or different parameter sets for the signal processing of measured values of different media are stored.
  • values e.g. B. Calibration values, comparison values or signal patterns for different media and/or for different flow rates or pump capacities of the pump and/or for flushing media such as water and/or different parameter sets for the signal processing of measured values of different media are stored.
  • the control unit can also access the values stored in the memory for the calculations to be carried out. Alternatively and/or additionally, it can also be provided that the measuring device can access the values stored in the memory.
  • control unit or a computer unit assigned to it carries out an evaluation of the information with recourse to the memory and with the aid of methods for signal processing, such as spectral analysis.
  • At least one medium is provided by a flushing medium, in particular water.
  • This embodiment of the metering device takes into account that rinsing with a rinsing medium advantageously takes place each time a medium has been metered.
  • the measuring device can also determine information for the flushing medium. For example, volumes of flushing medium can be determined and controlled. This information can be used to control and verify the functionality of the pump.
  • the heating element and/or the temperature sensor has a coating.
  • a coating includes, for example, parylene or polyurethane.
  • coatings made of or with ceramic materials are also possible, as well as coatings with resins, in particular epoxy resins.
  • This coating enables trouble-free functioning of the dosing device and a long service life, especially when using different media.
  • a plurality of containers with the same or with different media are connected to the dosing device on the input side, the dosing device having a mixed distribution device with an actuating element that can be addressed by the control unit and that has different positions in different actuating positions Switches communication paths in order to supply successive media, in particular different media, to the target device.
  • This exemplary embodiment enables different media to be supplied successively to one or more target devices.
  • the media located in the containers have, in particular, different viscosities and/or different thermal conductivities.
  • the measuring device in particular in cooperation with the control unit, is designed to take into account information about different media or information about different viscosities of the conveyed media during signal processing.
  • the invention thus provides a very broad area of application, which allows reliable determination of the type of medium and reliable determination of the delivery quantities, or their respective control, over a wide spectrum of different media.
  • the invention relates to a method according to claim 14.
  • the invention is based on the object of further developing a method known from the prior art in such a way that the dosing process is configured reliably.
  • the invention solves this problem with the features of claim 14.
  • the method is characterized by the step: Transmitting the information to the control unit.
  • This embodiment enables particularly simple signaling processing of the information.
  • This embodiment enables a particularly reliable process control.
  • the invention relates to a dosing device according to claim 15.
  • This invention is based on the object of developing a metering device of the generic type described at the outset in such a way that it allows metering processes to be carried out in an improved manner.
  • the invention solves this problem with the features of claim 15.
  • the principle according to the invention is that the dosing device has a temperature measuring device.
  • the temperature of a medium or a temperature of an environment of the dosing device can be measured with the temperature measuring device, ie an environment in which the dosing device is located or in which the medium is located.
  • the information about the temperature to be measured is referred to as temperature information.
  • This temperature information can be transmitted to the control unit of the dosing device.
  • the control unit of the dosing device can be connected directly or indirectly to the temperature measuring device, for example.
  • the control unit can subsequently take into account the temperature information received when the pump is activated.
  • the Invention recognizes that the viscosity of media, including the viscosity of water, is temperature dependent.
  • media are regularly used whose viscosity increases with increasing temperature.
  • media are also known, for example, whose viscosity decreases with increasing temperature. The differences in viscosity can be decisive in certain temperature ranges and significant for dosing processes and, if not taken into account, can lead to improper dosing processes.
  • the control unit can take into account the temperature-dependent differences in viscosity and, for example, at higher temperatures, run the pump for a longer period of time Allow the medium to be pumped, thus compensating for the higher viscosity and, as a result, pumping the required and desired amount of medium to a target vessel.
  • the control unit accesses a memory in which viscosity information is stored.
  • viscosity information include information about different viscosities of different media at different temperatures.
  • continuous or discrete values for the viscosity can be stored here.
  • the filing of this Viscosity information can be in the form of algorithms, curves, tables etc.
  • the temperature information from the control unit can be related to the viscosity information. After relating this information, the control unit can take into account the viscosity information and the temperature information when performing a dosing process or in a process for calibrating the pump.
  • the temperature measuring device is provided by the temperature sensor.
  • the invention kills two birds with one stone:
  • the temperature sensor with the help of which information about the conveyance of the medium through the conveying line can be determined, can also be used to obtain information about the temperature of the medium or the environment in order to determine temperature-dependent To be able to consider viscosities of the medium in a dosing process.
  • a first exemplary embodiment of a dosing device according to the invention is 1 designated 10 in its entirety.
  • a suction lance 42a, 42b, 42c dips into each of the containers 11a, 11b, 11c and is connected to an inlet 20a, 20b, 20c of a mixing distribution device 17 via a supply line 54a, 54b, 54c.
  • the mixed distribution device 17 comprises an input disk 18 and an output disk 19 which can be rotated about an axis of rotation 53 .
  • a motor 22 is provided in order to rotate the output disc 19, which functions as an actuator or actuator 41.
  • the engine 22 is can be addressed by a control unit 15 of the dosing device 10 via a signal line 23b.
  • the mixing distributor device 17 has an outlet 21 to which a fluid line 13 is connected.
  • the fluid line 13 leads to a target device 14 (see e.g. 1 ).
  • the target device is a commercial washing machine or a household washing machine 14.
  • the washing machine 14 includes a program selection switch 47 which is connected to a control device 55 on the target device 14 .
  • the control unit 55 of the target device 14 is connected to the control unit 15 on the dosing device 10 via a signal line 23a shown in dashed lines.
  • the metering device 10 also includes a pump 16, which is also connected to the control unit 15 via a signal line 23c.
  • the control unit 55 can make a request for a specific medium to the control unit 15 via the signal line 23a.
  • the control unit 15 receives the request to convey a predetermined quantity of a predetermined medium to the target device 14 at a specific point in time.
  • the control unit 15 can first address the motor 22 in order to Actuate actuating element 41 in order to switch the desired communication path, so that the corresponding medium 12a, 12b, 12c can be promoted. Then the control unit 15 can address the pump 16 to operate for a predetermined period of time or for a predetermined number of revolutions in order to deliver a predetermined amount of medium.
  • the fluid line 13 can then be flushed.
  • control unit can address the motor 22 again, so that the actuator 41 is shifted to a different rotational position and connects an input 20a, 20b, 20c connected to a container with rinsing agent to the output 21.
  • the pump 16 can then be addressed again by the control unit 15 in order to convey flushing medium.
  • the dosing device 10 according to 1 a unit 30a is provided, which according to the Fig.2a according to the invention a heating element 24 and at least one temperature sensor 25, preferably a pair 27 of temperature sensors 25a, 25b.
  • the structural unit 30, 30a also includes a measuring device 26.
  • the structural unit is denoted by 30a and is arranged in the flow path between the mixing distribution device 17 and the pump 16.
  • the structural unit 30a is therefore arranged upstream of the pump 16.
  • FIG. 12 also shows an alternative embodiment in dashed lines, according to which an assembly 30b of the same or identical construction can be arranged downstream of the pump 16.
  • FIG. 12 also in this alternative embodiment, the structural unit 30b but associated with the dosing device 10 . In particular, this is part of the dosing device 10.
  • Figure 2a shows a schematic representation of a unit 30, which includes a heating element 24, a first temperature sensor 25a and second temperature sensor 25b.
  • the heating element 24 protrudes into the interior of the fluid line 13 .
  • the assembly 30 provides a piece of tubing 57 having two hose connector ends 48a, 48b for connecting corresponding portions 13a, 13b of the fluid line.
  • a circumferential rib can be provided on the pipe section 57, for example. This enables the hose ends 13a, 13b to be clamped and mechanically fastened in a simple manner.
  • these elements 24, 25a, 25b may also protrude into the fluid flow in other exemplary embodiments, for example in order to ensure turbulence in the area of temperature measurements and also to make the fluid flow more even over the entire cross section of the fluid line 13.
  • the two temperature sensors 25a, 25b are arranged symmetrically to the heating element 24.
  • the distance 29a between the temperature sensor 25a arranged upstream of the heating element 24 and the heating element 24 is exactly as large as the distance 29b of the heating element 24 to the temperature sensor 25b arranged downstream.
  • the symmetrical geometry means that when the medium is at a standstill, i.e. when no medium is being pumped, the heat flow generated by the heating coil 49 or another heating device is distributed evenly over the two temperature sensors 25a, 25b, so that due to the identical distance 29a, 29b from the two sensors 25a, 25b, from the two sensors 25a, 25b in each case also the same or essentially the same heat input is measured.
  • the temperature sensor 25a arranged upstream can no longer measure any thermal energy generated by the heating element 24 due to the heat entrainment, or at least only one considerably less thermal energy than the downstream temperature sensor 25b.
  • no signal or almost no signal can be measured when the medium is at a standstill, and a clear signal can be measured after the pump drive is switched on.
  • the embodiment of Figure 2b has a modified symmetrical arrangement, in which the heating element 24 is arranged on one wall of the structural unit 30 and the two temperature sensors 25a, 25b are arranged on the opposite wall.
  • the pipe section can have window-like openings in its wall area, which, however, Figure 2c are not shown.
  • the assembly 30 includes according Figure 2a (- but also according to the Figure 2b and 2c -) A heating control 56, which ensures that the heating element 24 is addressed continuously or clocked or irregularly or possibly according to specific specifications and causes a corresponding heat input into the fluid line 13 pending or funded medium.
  • the heating controller 56 is connected to a measuring device 26 via a signal line 23f.
  • the measuring device 26 is also connected to the temperature sensors 25a, 25b via corresponding signal lines 23g and 23h and can record corresponding measured values from there.
  • the measuring device 26 can have a computer unit 31 or be connected to a computer unit 31 via a signal line 23i.
  • the measuring device 26 is able to process the signals output or received from the two temperature sensors 25a, 25b or to preprocess the signals.
  • the measuring device 26 can determine a difference between the values output by the two temperature sensors 25a, 25b.
  • this differential value contains information about whether medium has been conveyed through the structural unit 30, and in particular also provides information about the volume of medium that has been conveyed and what type of medium is being conveyed.
  • a measured value ⁇ V corresponding to a result of a differential measurement is plotted on the Y-axis. This is just an example of a differential reading, assuming temperature readings are reported in volts.
  • This measured value ⁇ V should therefore only stand as an example for any differential measured value.
  • differential values ⁇ V of zero or approximately zero are to be measured. It is a differential measurement signal that takes into account that in both temperature sensors 25a, 25b of the embodiment of FIG figure 2a the same temperatures are measured due to the symmetrical design of the assembly 30.
  • the signal curve of the differential measured value ⁇ V shows the 3 for time periods t ⁇ t 0 a difference measurement value V 0 , ie a kind of offset value.
  • this can be zero or approximately zero, or at least a small, essentially constant value.
  • the value can also be subject to a certain amount of noise, as will be explained later using further actual measured values.
  • the pump 16 is activated in order to deliver a predetermined quantity of medium, this leads to the difference signal ⁇ V according to 3 corresponding to a signal edge 51 rises sharply, up to a value V 1 .
  • the difference between V 1 and V 0 is called amplitude A 1 .
  • the pump 16 is then switched off and thus stopped, some medium will continue to flow.
  • the signal ⁇ V then falls in accordance with the signal falling edge 52, up to approximately a point in time t 3 , at which the initial value V 0 is reached again.
  • An actually measured signal can also deviate in its signal form from the signal curves shown in the drawings.
  • the signal can include information about the amount of medium being pumped.
  • the signal can be integrated.
  • the Area under the curve of 3 should be proportional to the flow rate, or at least in relation to the flow rate.
  • z. B. Shown in dashed lines 3 a second waveform 33b, z. B. is used for another medium, the z. B. has a different viscosity.
  • the dashed line 33b in 3 can also represent a signal curve for a delivery of the same medium with a different pump delivery rate.
  • the flow rate can also be inferred from this signal form. Again, a statement about the delivered volume can be obtained by integration, ie by determining the area under the signal curve.
  • FIG. 12 again shows two different signal forms, the signal form 33e corresponding to the signal form 33a, and a different signal form 33f being obtained for a different medium.
  • the signal rising edges 51, 51f and the signal falling edges 52, 52f differ significantly due to the different viscosities and the different media, possibly also due to the different heat capacities and/or the different thermal conductivity properties of the media used.
  • information can be derived on the basis of the measured signal curves of measured values, in particular differential measured values that come from temperature sensors and can be subjected to signal processing:
  • signal forms or signal contours signal rising edges, Signal falling edges, signal amplitudes, signal lengths, and signal-swept areas, as well as periodicities or pulsations in the signal curve, which will be explained later, can be used to obtain a large amount of information about the conveyed volume and the type of medium conveyed.
  • This information can also be related by the control unit to information already present in the control unit, e.g. B. about the nature of the funded medium or the target flow rate. This allows tests, controls and determinations of different types to be carried out.
  • the Figures 7a to 8b show different signal patterns for different media, with different viscosities or with different heat capacities and different pump capacities.
  • the measured values allow information to be determined.
  • Information can be ascertained by the measuring device 26 or by the control unit 15 of the dosing device 10 . In any case, information as far as it is determined by the measuring device 26 can be transmitted to the control unit of the dosing device.
  • the schematically illustrated signal curves 58a, 58b, 58c, 58d, 58e, 58f, 58g, 58h of Figures 7a to 8d correspond to the representations that become visible on an oscilloscope when a differential measured value is measured on a structural unit 30, 30a, 30b, 32a, 32b, 32c.
  • the Figures 7a to 7d correspond to the differential measured values of measurements of a first medium, the same pump being used in each case, but different pump delivery rates having been set.
  • the Figures 7a to 7d different rotational speeds or speeds of a peristaltic pump. So can Figure 7a example of a signal curve 58a of a pump with a flow rate of only 25%, Figure 7b for a delivery rate of 40%, Figure 7c for a flow rate of 85%, and Figure 7d for a delivery rate of 95%.
  • the Figures 8a to 8d illustrate turn for comparable different flow rates the signal behavior in a compared to the Figures 7a to 7d changed medium with a different viscosity.
  • the signal curves are all or almost all periodic: the period duration is designated as T 1 , T 2 , T 3 , T 4 etc. in each case.
  • the signal course of the Figure 7a has a periodicity T 1 .
  • the time interval between the times t 1 and t 0 is exactly the same as the time interval between the signal profile minima at the times t 2 and t 1 or t 3 and t 2 .
  • the signal curve with minima and maxima can be explained by the pressure behavior of the rollers or rollers of a peristaltic pump, which has a pair of pressure rollers located 180° opposite one another. This results in a certain pulsation 37, which is imposed on the fluid flow during operation of the peristaltic pump, and which is also reflected in the signal pattern Figures 7a to 7d shows.
  • FIG.7a an amplitude A 2 between minimum and maximum and Figure 7b an amplitude A 1 , which is lower in contrast and the respect Figures 7c and 7d , referred to as A 1 and A 2 there, is further reduced.
  • the dosing device 10 has a memory 39 which is part of the control unit 15 or connected to it via a signal line 23j connected is.
  • Various values can be stored in the memory 39 .
  • the values can include signal curves or signal patterns or signal properties for different delivery capacities of the pumps and/or for different types of media and/or for different viscosities and/or for different delivery quantities.
  • the control unit 15 can determine the amount of medium that is being conveyed, whether the correct amount of medium has been conveyed, which medium has been conveyed, or whether the correct medium has been conveyed.
  • the embodiment of 6 corresponds to the embodiment of 1 , With the input side to the metering device 10 of 6 only one container 11 is connected.
  • FIG 6 Again illustrates the embodiment of FIG 6 two different positions for the assembly 30a, 30b, whereby this can be arranged either upstream of the pump 16 or downstream of the pump 16.
  • the embodiment of 9 shows a dosing device 10 according to the invention, to which three target devices 14a, 14b, 14c are connected on the output side, with the dosing device 10 having a second mixing distribution device 43, with an input disk 44 functioning as an actuating element 46 and an output disk 45.
  • the input disk 44 is from a motor 22b can be driven in rotation and can optionally produce different communication paths between the inlet 20 and the three outlets 21a, 21b, 21c of the outlet disc 45.
  • each target device 14a, 14b, 14c is assigned a structural unit 30a, 30b, 30c.
  • Each of the structural units 30a, 30b, 30c is connected either to the control unit 15 of the dosing device 10 and/or to a control unit 55 of the corresponding target device 14a, 14b, 14c.
  • the structural unit 30a, 30b, 30c is used to provide a POD signal. This is important, for example, for certain washing or cleaning programs. It can also be used for documentation purposes to provide ongoing assurance that proper dosing has been performed at specific times.
  • FIG 10 shows another embodiment of a dosing device according to the invention, based on the embodiment of FIG 9 :
  • an additional structural unit 32a, 32b, 32c is provided immediately upstream of the target devices 14a, 14b, 14c.
  • assemblies 32a, 32b, 32c are configured to generate a POD (proof-of-delivery) signal.
  • This signal can either be transmitted to the respective control unit 55a, 55b, 55c of the respective target device 14a, 14b, 14c or via the in 10 connecting line shown in solid lines to the control unit 15 of the dosing device 10.
  • this information can be further used by the control unit. For example, the conveyed amount of medium can be reported to the target device or documented. It can also be compared with a request signal and the target delivery rate. In this way, the control unit can check whether the dosing process has been carried out correctly. If there is a discrepancy between the target flow rate and a specific or calculated flow rate, e.g. B. a warning signal can be issued or a fault message can be initiated.
  • a specific or calculated flow rate e.g. B.
  • a measurement signal according to Figure 8b recorded.
  • the periodicity of the signal, or waveform, or waveform, e.g. B. the amplitudes, the signal rising edges, the signal falling edges, the signal contours can be checked by comparison with corresponding values that are arranged in the memory 39 to determine whether the correct medium has been promoted.
  • This Values are media-dependent or viscosity-dependent.
  • the control unit 15 can have previously obtained information about which media have been connected to which inlets 20a, 20b, 20c of the dosing device 10. After receiving a request signal from the target device 14 and a response of the motor 22, the control unit knows which medium 12a, 12b, 12c should be conveyed. By comparing with the values received from the structural unit 30, 30a, 30b and using the values stored in the memory 39, the control unit can check whether the measured signal curve corresponds to an expected signal curve or deviates from it.
  • a warning signal, a fault message or the like can be generated or initiated.
  • the pump 16 by measuring the signal curve and determining the amount of medium delivered from it, it can be checked whether the pump 16 is still able to deliver the desired delivery amounts. If necessary, the measured and determined flow rate values can be used to recalibrate the pump.
  • the structural unit 30, 30a, 30b has an internal computer unit 31 with which signal processing can be performed.
  • the signal processing can be based on the values determined by the different temperature sensors 25a, 25b being subjected to a comparative analysis.
  • a special exemplary embodiment of the invention provides for these considerations and calculations for optimizing the measurement results with different sets of parameters be performed.
  • adjustments of the parameter sets to different media are provided according to the invention, the media z. B. have different viscosities or different heat capacities.
  • the dosing device 10 with the aid of the control unit 15 with knowledge of the medium 12a, 12b, 12c to be conveyed and in cooperation with the computer unit 31 of the structural unit 30, 30a, 30b, to the medium conveyed in this individual case 12a, 12b, 12c adapted sets of parameters or calculation parameters transmitted.
  • the invention encompasses when the structural unit 30, 30a, 30b only supplies raw values and the corresponding signal processing and calculation is carried out by the control unit 15 or by a computer unit connected to the control unit 15.
  • ID figure 11 is an embodiment of a unit 30 of a dosing device 10 according to the invention in a representation comparable to that Figure 2a illustrated, in which only a temperature sensor 25 and a heating element 24 are provided.
  • the temperature sensor 25 and the heating element 24 are designed to be integrated and combined to form an NTC component.
  • An example is in the embodiment of figure 11 an NTC component shown, which could alternatively be a PTC component.
  • the device 30 according to figure 11 includes a constant current source 59. This leads the NTC component 60 a constant current.
  • the circuit of the constant current source 59 which is not shown, can include a power limiter.
  • the current flowing through the component 60 heats the component or the resistor due to ohmic heat. As a result, the component 60 reaches a specific temperature.
  • the voltage U drop across the resistor can be measured as a measure of the electrical resistance R of the component 60 .
  • the input 61a and the output 61b of the component 60 are connected to the measuring device 26, which can carry out a voltage measurement.
  • the voltage to be measured is constant or almost constant. If the pump 16 responds and the medium 12 is conveyed through the fluid line 13, the medium 12 takes thermal energy with it, so that the temperature of the component 60 decreases. Depending on whether the component 60 is an NTC element or a PTC element, this leads to a rising or falling resistance of the component 60. The change in the resistance R of the component 60 is expressed in a corresponding change in voltage U.
  • the measurement signal recorded by the measurement electronics 26 can therefore in turn include information about the fluid conveyance through the fluid line 13 .
  • the invention encompasses further exemplary embodiments that are not shown, which include a plurality of electronic components 60 with NTC or PTC components.
  • the invention also includes when more than two heating elements 24 and/or more than two temperature sensors 25a, 25b are provided along the fluid line 13. For example at When media are used that can easily break off when conveyed, it has proven to be advantageous if a measurement is carried out along a number of measuring points, ie along a number of temperature sensors spaced apart from one another, and an averaging is carried out along different measuring points.
  • the invention also includes the use of a measuring circuit that includes a plurality of temperature-dependent resistors as temperature sensors, which are connected in series, for example.
  • the embodiment of figure 12 shows a structural unit 30 with a first temperature sensor 25a and with a second temperature sensor 25b.
  • the first temperature sensor 25a includes a heating element 24 which is addressed by a heating controller 56 .
  • the two temperature sensors 25a, 25b can be of any design. For example, they can each have a temperature-dependent, measurable resistance.
  • the temperature sensor 25a is connected to a first measuring device 26a via a measuring circuit and the temperature sensor 25b is connected to a measuring device 26b via an analog measuring circuit. Both measuring devices 26a, 26b are connected to a computer unit 31 of the structural unit 30.
  • the computer unit 31 is in turn connected to the heating controller 56 via a signal line 23n.
  • a first temperature T1 can be measured at the temperature sensor 25a, which differs by a constant amount, for example by 5 degrees Celsius, or by 10 degrees Celsius, or by 15 degrees Celsius, from a temperature T2 that is in the range of the second Temperature sensor 25b is measured.
  • the heating controller 56 attempts to keep this temperature difference, which can be set if necessary, constant.
  • the measuring devices 26a, 26b can report the measured temperature values from the two temperature sensors 25a, 25b to the computer unit 31 and the computer unit can transmit a corresponding feedback signal to the heating controller 56 via the signal lines 23.
  • This feedback signal leads to readjustment of the heating control and thus to heating of the heating element 24 in order to bring the temperature difference, which may have gotten out of balance, back to a desired value.
  • the heating element 24 requires a specific power or energy supplied. If the medium 12 is conveyed through the fluid line 13 by the pump 16, additional heating energy must be added in order to keep the temperature difference ⁇ T between the two temperature sensors 25a, 25b constant. Under the premise that a heating controller 56 attempts to keep the temperature difference ⁇ T between the two measured temperature values constant, the supplied heating power or heating energy for the heating element can be a measure of the delivery of medium 12 through the fluid line 13 . According to the invention, this value can be used as a measured value.
  • the computer unit 31 is able to compare the temperatures calculated by the measuring devices 26a, 26b and to transmit a determined signal to the heating control 56 via the signal line 23n.
  • the extent of this activation can also be used as a measured value, for example.
  • the invention also includes when the heating power for the heating element is determined or measured at another location.
  • the embodiment of figure 12 shows a regulation of the heating control 56 in the manner of a digital regulation.
  • other analog control circuits (not shown) are also encompassed by the invention.
  • a dosing device 10 which has a temperature measuring device 62 with which a temperature of at least one medium 12a, 12b, 12c can be measured, or with which a temperature of an environment of the dosing device 10 can be measured.
  • the temperature information about the measured temperature can be transmitted to the control unit 15 of the dosing device 10 .
  • the control unit 15 is designed to take into account the information obtained about the temperature when controlling the pump 16 for carrying out a dosing process or when calibrating the pump 16 .
  • a temperature measuring device 62a is provided, which is arranged directly on the fluid line 13, or protrudes into it, or is provided at another suitable point.
  • the Temperature measuring device 62a is designed to measure a temperature of the medium 12a, 12b and/or a temperature of the surroundings of the metering device 10 and to transmit this temperature information to the control unit 15 of the metering device 10 via a signal line 23o.
  • the metering device 10 includes a memory 39 which is connected to the control unit 15 via the signal line 23j. Viscosity information is stored in memory 39 . This viscosity information includes, in particular, information about the viscosities of different media 12a, 12b, 12c at different temperatures.
  • control unit 15 can use the memory 39 to determine the viscosity of the medium 12a to be conveyed at this temperature. The control unit 15 can then check whether there is a reason to adapt or change the dosing process, for example in such a way that the running time of the pump 16 is increased or reduced in order to supply the desired correct amount of medium 12a, 12b, 12c to the target device 14.
  • This procedure takes into account that media whose viscosity increases with increasing temperature can, for example, require a longer pumping time at higher temperatures.
  • the control unit 15 can take this fact into account in terms of a longer response time of the pump 16 .
  • FIG 13 also makes it clear that additional or alternative temperature measuring devices 62b, 62c, 62d, each connected via signal lines 23p, 23q, 23r, also to the control unit 15 can be connected.
  • additional or alternative temperature measuring devices 62b, 62c, 62d each connected via signal lines 23p, 23q, 23r, also to the control unit 15 can be connected.
  • Such an arrangement of the temperature measuring devices 62b, 62c, 62d on the containers 11a, 11b, 11c or near the containers makes sense, for example, if the containers 11a, 11b, 11c for the media 12a, 12b, 12c are located at a distance from the dosing device 10, for example in separate rooms.
  • the embodiment of figure 14 shows another example of the invention, which has a temperature measuring device 62 and based on the embodiments of FIG Figures 1 to 12 has described unit.
  • at least one of the two temperature sensors 25a, 25b, which is arranged in the structural unit 30a, is designed in such a way that it also provides the temperature measuring device 62.
  • the desired information about a promotion of medium 12 can be determined and at the same time temperature information about the temperature of the medium 12 can be transmitted to the control unit 15.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
EP22193361.7A 2021-10-07 2022-09-01 Dispositif de dosage Pending EP4162856A1 (fr)

Applications Claiming Priority (2)

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DE102022116545 2022-07-01

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EP3115498A1 (fr) 2015-07-06 2017-01-11 Michael Saier Dispositif de dosage destine au dosage et a l'introduction de milieux et procede
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DE102017114767A1 (de) 2017-04-04 2018-10-04 Beatrice Saier Dosiereinrichtung und Verfahren zum Betreiben einer Dosiereinrichtung
DE102017114665A1 (de) 2017-06-30 2019-01-03 Beatrice Saier Dosiereinrichtung u.a.
DE102018113644A1 (de) 2018-06-07 2019-12-12 Beatrice Saier Dosiereinrichtung
DE102020106712A1 (de) 2019-05-22 2020-11-26 Beatrice Saier System zur Dosierung von Medien u.a.

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