AT515721A1 - Dispenser and dosing system for the metered dispensing of stored in containers chemical substances to a dishwasher or washing machine - Google Patents

Abstract

A dispensing device (2, 3) for the metered dispensing of chemical substances stored in containers (24, 25) to a dishwasher (4) or washing machine comprises a dispensing logic unit (22, 23) having a control algorithm (22a, 23a) for metering the chemical Substance (24b, 25b). The control algorithm (22a, 23a) doses the delivery of the chemical substance (24b, 25b) in such a way that the actual substance value of the mixture of the chemical substance dispensed and water in the dishwasher (4) or washing machine is approximated to a desired substance conductivity. The control algorithm (22a, 23a) adjusts the target level of conductance by a standard conductivity, a standard water conductivity for supplied water, an actual water conductivity of the supplied water, a standard water hardness for supplied water, an actual water hardness of the supplied water, a compensation factor for deviations between the standard water hardness and the actual water hardness and optionally includes an adjustable correction factor as a control parameter. Optionally, the donor logic unit (22, 23) reads this data by means of an RFID reader (2h, 3h) from an RFID tag (24c, 25c) of the pack.

Description

Dispenser and Dosiersvstem for metered delivery of stored in containers chemical substances to a dishwasher or washing machine

The invention relates to a dispenser and a dosing system for the metered delivery of stored in containers chemical substances to a dishwasher or washing machine. Such dispenser devices and dosing systems are used in commercial kitchens, laundries, etc.

On-the-market dispenser devices have a mains power supply, central logic placed directly in the dispenser and controlling all processes of metered dispensing of a substance from the dispenser, inlet and outlet valves, a water supply to dissolve the substance with water and / or to mix, a substance output line and sensors, such as a conductivity sensor placed in the dishwasher or washing machine for measuring the conductivity of the chemical substance delivered. A user interface in the form of a display and buttons is attached to the housing of the dispenser and connected to the central logic. An outlet opening of the container of the chemical substance is connected to an inlet opening of the dispenser, wherein the container is placed directly on the dispensing device and by means of micro-switch based on the shape of the container outlet, the substance contained therein is detected.

The object of the present invention, in a first aspect, is to provide an improved control algorithm for dispensing the chemical substance with which the dosage of the substance succeeds more accurately than before and which leads to improved rinsing and washing processes in the dishwasher or washing machine, optimally at the same time reduced Substance consumption leads. This improved control algorithm doses the delivery of the chemical substance so that the actual material conductivity of the mixture of the chemical substance dispensed and water in the dishwasher or washing machine, which mixture is referred to by experts as a wash liquor or rinse liquor, from a target material conductivity of the mixture Water is approximated with the substance dispensed by the dispenser in the dishwasher or washing machine. The control algorithm includes as a control parameter a predetermined standard conductivity, a given standard Wasserleitwert of zuzuführendem water, an actual conductivity of the supplied water, a predetermined standard water hardness of zuzuführendem water, an actual water hardness of the supplied water, a balancing factor for the standard -Substanzleitwert for deviations between the standard water hardness and the actual water hardness and optionally an adjustable

Correction factor, wherein the desired substance conductivity of the rinsing liquor is preferably calculated according to the following formula:

Target substance value = correction factor x (standard substance conductivity -

StandardWas serleitwert + IstWasserleitwert) x compensation factor (IstWasserhärte "StandardWasserhärte)

The standard level of conductance is the conductance in pS exhibited by the chemical substance and water mixture in the manufacturer's tests in a dishwasher or washing machine, which tests had shown a proper wash result.

The standard water conductivity is the conductivity in pS of the water that was mixed with the substance in the tests.

The standard water hardness is the water hardness in ° dH of the water that was mixed with the substance in the tests.

The actual water conductivity is the conductivity in pS of that water which is supplied to the donor device on site.

The actual water hardness is the water hardness in ° dH of that water, which is supplied to the donor device on site.

The correction factor is set by a technician and makes it possible to adapt the dosage locally to the circumstances, for example if old or in bad state dishwashers are present, or no prewashing is to be performed, etc.

The compensation factor represents an increase per ° dH and indicates the factor by which the dosage of the substance must be increased with a higher water hardness in order to achieve an equally good rinsing or washing result.

The equalizing factor is very important, for example, when the substance to be dosed is a cleaner containing two different components, one of which is an alkaline component responsible for the performance of the cleaning, and a second component is a complexing agent which is responsible for the binding of all cations is responsible, because only then the cleaner can work effectively. By the

Compensation factor is dosed at a higher water hardness more cleaner to have enough complexing agent in the rinse water mixture, the so-called rinsing liquor.

The control algorithm of the donor logic unit provides particularly good results if it is configured as a fuzzy logic controller.

The detection of a container of conventional dispenser devices by means of micro-switches has proven in rough everyday operation as unreliable. Furthermore, the problem with the proposed control algorithms is that they access parameters that are substance-dependent and changeable. It would therefore be desirable if the substance-dependent parameters could not be supplied manually but automatically to the control algorithm of the donor logic of the dispenser device according to the invention. To solve these objects, the invention proposes that the dispenser device has an RFID reader near its substance inlet, with which information contained in an RFID tag attached to the container can be read, the information preferably comprising a substance identification, such as a product and country code, and substance characteristics, such as standard standard conductivity, standard conductivity of water to be supplied to the substance, standard water hardness of the substance to be supplied with water, and standard standard deviation value for the deviation between the standard water hardness and the actual water hardness.

In a further aspect of the invention, a container is proposed which contains a chemical substance for dispensing to a dishwasher or washing machine, which container has an outlet which can be connected to a substance inlet of a dispenser, the container having an RFID tag, the one substance identification and substance characteristics, such as a standard conductivity, a standard conductivity of water to be supplied to the substance, a standard water hardness of the water to be supplied to the substance, and a standard substance conductance compensation factor for deviations between the standard water hardness and the actual water hardness.

In known dosing has been found to be problematic that the mains voltage is applied directly in the dispenser. In the event of breaks or leaks in the water and substance lines, the supplied water and the substance splash around in the housing of the dispenser device and can cause mains voltage short circuits, destroy central logic and endanger people. If the central logic fails, the entire dosing system including the dishwasher is paralyzed. When repeatedly opening the

Housing of the dispenser there is a risk that the cable of the user interface is kinked or torn off.

To overcome these difficulties, the present invention also proposes to integrate a dispenser according to the invention in a metering system for the metered delivery of stored in containers chemical substances to a dishwasher or washing machine, wherein the dosing a machine logic unit for controlling the operation of the dishwasher or washing machine and a user Interface with a display and includes buttons. The dosing system is characterized in that it is modular in construction, with the donor logic unit included in each dispenser being spatially separate from the machine logic unit, preferably installed in the dishwasher or washing machine, the machine logic unit being equipped with sensors in the dishwasher or washing machine communicates and monitors and controls pumps, motors, control inputs, and optionally the heating of the dishwasher or washing machine, the machine logic unit having a low voltage electrical power supply power supply, in particular 12 volts or 24 volts DC, the at least one donor logic unit and the machine logic unit connected by a power and communication bus, the power supply lines with the low voltage generated by the power supply and data lines for communication between the at least one donor logic unit and the machine log ikeinheit has.

The main difference of the metering system according to the invention over the conventional system lies in the decentralization of the logic of the system and the modular design of the system. Now, each dispenser and each unit of the system has its own logic that can independently handle such tasks as e.g. control the metered delivery of the substance, the filling of a reservoir, etc. The units are powered by the power supply and communication bus with a low voltage generated by a power supply and therefore no longer have to carry mains voltage. Information about the bus is given. other system participants passed on.

In one embodiment of the invention, the user interface is configured as a separate unit from the donor device and the machine logic unit, which is connected to the power and communication bus. For the scalability, maintainability and monitoring of the metering system according to the invention, it is advantageous if the units connected to the power supply and communication bus are configured as a master-slave system in which a unit, preferably the user interface, is defined as a higher-level controller, which controls the remaining units. Preferably, the machine logic unit transmits readings of the sensors to which it is connected to the donor logic unit.

The inventive design of the dosing system offers the following advantages: Any expansion of the system, additional components can be added simply as bus subscribers. The dosing system can be ideally designed for the respective dishwasher, regardless of whether it is a small glasswasher or a large belt machine. The same applies to washing machines. • Minimized cabling and Installation costs, as signals or relevant variables are taken directly u. be processed where they arise. For example, signal states of the dishwasher are measured directly in the machine, digitized u. processed. • Accessories, such as a central dosing or an interface module for communication can be easily integrated without the basic system having to be changed. • If one unit in the system fails, the remaining units remain functional; the construction of redundant systems is possible. Certain units of the system may be used in other systems, e.g. the user interface in a dosing system for the laundry.

In order to dissolve the chemical substance in the connected container with water, in particular when the substance is in the form of a pressed, solid powder block, and / or to dilute a liquid or viscous substance, in one embodiment of the invention the dispensing device has a valve or pump the donor logic unit controlled water supply. Preferably, in the water supply a communicating with the Spenderlogikeinheit communi water meter is installed, which provides information about the actual water consumption, which in turn allows conclusions about deficient substances. For example, a substance present as a pressed powder block in the container could be deficient if too much water is needed to make the product

Rinse substance from the container. In order to achieve an optimal cleaning result, low water consumption and uniform substance consumption, it is advantageous if the machine logic unit has a communicating with a tank of the dishwasher or washing machine liquid temperature sensor, the donor logic unit only begins with the dosage of the substance when the liquid in the tank a has or exceeds specified minimum temperature.

The regulation of the metered delivery of the substance in the dispenser can be accelerated if the dispenser device in the path of the substance by the dispenser has a conductivity sensor for measuring the conductance of the chemical substance to be dispensed or the mixture to be dispensed the substance with the water supplied. In this configuration, the donor logic unit will immediately have conductivity changes available for adjustment of the control. In particular, the emptying of the substance in the container, the change in the composition of the mixture of the substance with the supplied water or an overflow of the substance in the dispenser immediately recognizable and it can be set the appropriate measures, whereas in a conductivity measurement only in the dishwasher conductance changes only delayed get to the donor logic unit.

To increase electrical safety, the donor logic unit and the machine logic unit are sheathed in a watertight manner. Their electrical connections are accessible via watertight, preferably polarity-reversing, sockets, with particularly preferred electrical connections, in particular those connections, which lead voltages above the limit of the protective extra-low voltage of 50 V, are opto-electronically or galvanically isolated.

The dosing system according to the invention makes it possible to connect to the power supply and communication bus a personal computer, a notebook, a tablet computer or the like, on which a monitoring, maintenance or configuration program of the dosing system is executable. In a further development of the metering system according to the invention, a remote maintenance module of the metering system can be connected to the power supply and communication bus.

In order to still have to lay a hose to the dishwasher or washing machine while using multiple dispenser devices on a dishwasher or washing machine, it is advantageous if the substance outlet of the dispenser has a connection for connection to a substance outlet of another dispenser.

The invention will be explained in more detail by means of embodiments with reference to the drawings.

Fig. 1 shows schematically an embodiment of a modular metering system according to the invention.

Fig. 2 shows a graph of an algorithm used in the dosing control.

Reference is first made to FIG. 1, which schematically shows an embodiment of a modular metering system according to the invention for the metered dispensing of chemicals stored in containers 24, 25 to a dishwasher 4. The dosing system has a user interface 1, which serves as input and output device for the user and technician to control and configure the system. The user interface 1 has a display 10, buttons 11 for control and two bus plugs 12, 13 for the power supply of the user interface 1 and for communication with other bus subscribers by means of a power and communication bus.

The dosing system further comprises a dispensing device 2 for dispensing a chemical substance 24b in the form of a pressed into a powder block cleaner, which is flushed out of its container 24 by water. The container 24 is connected with its outlet 24a to the substance inlet 2a of the dispenser 2, the rinsed cleaner is passed via the hose connection 20 in the tank 32 of a dishwasher 4. An electronic donor logic unit 22 built into the donor device 2 controls and controls the donor device 2. The donor logic unit 22 is connected to sensors such as a conductivity sensor 2f and a water meter 2e and valves 2d and optionally a pump, all of which are disposed in the donor device 2. The donor logic unit 22 is connected to the power and communication bus via two bus connectors 14, 15 which are used for powering and communicating with the other bus users. The dispenser device 2 has a water supply line 2c for rinsing out the substance 24b. The water supply line is controlled by the donor logic unit 22 via the valve 2d. In the water supply line 2c, a water meter 2e communicating with the donor logic unit 22 is installed. Furthermore, the donor logic unit 22 measures the electrical conductivity of the mixture of purged cleaner and water by means of the conductivity sensor 2f arranged on the substance outlet 2b.

The dosing system comprises a second dispensing device 3 for dispensing a chemical substance 25b in the form of a fluid from a container 25. The container 25 is with his

Outlet 25a connected to the substance inlet 3a of the dispenser 3. Depending on the type of fluid, this is conducted either directly via the supply line 21 and the spray arm 26 into the dishwasher 4 or through a connecting line 33 connected to the substance outlet 2b of the first dispenser 2 and further into the tank 32 via the hose connection 20 the dishwasher 4 out. The second dispenser device 3 is very similar to the first dispenser device 2. It also has a built-in electronic donor logic unit 23 which controls and controls the dispenser device 2. The donor logic unit 23 is connected to sensors such as a conductivity sensor 3f disposed at the substance outlet 3b and valves 3d for controlling the flow of the fluid. The donor logic unit 23 is connected to the power and communication buses via two bus plugs 16, 17, which are for powering and communicating with the other bus users.

The dishwasher 4, depending on the design, a small glasswasher, or - as shown in Fig. 1 - a hood machine, or even a large belt machine. In the dishwasher 4, a machine logic unit 31 is installed, which has a power supply 31a for converting electrical mains voltage into low voltage, in particular 12 volts or 24 volts DC. With the low voltage supplied to the machine logic unit 31 all participants of the dosing via the bus. The machine logic unit 31 has sensor inputs 29, 30 for detecting status values of e.g. Solenoid valves 27, motors 28, temperature (from a liquid temperature sensor 35), quantities of water, limit switches, etc. The machine logic unit 31 has control inputs E1-E3 for e.g. the functions filling, washing, rinsing. The dishwasher 4 has a tank 32 in which the wash liquor (= mixture of water with the substance 24b, 25b delivered by the dispenser devices 2, 3) is located, which is supplied via the motor 28, which drives a pump, and the spray water. Arm 26 is pumped in a circle. For measuring the concentration of the substance 24b, 25b in the wash liquor, a conductivity probe 34 is installed in the tank 32, which is connected via the bus line 9 to one of the two bus connectors 18, 19 and thus communicates with the machine logic unit 31.

All participants in the dosing system are cabled via bus cables 5, 6, 7, 8, 9.

The power supply and communication bus is designed as a RS485 bus.

The donor logic units 22, 23 and the machine logic unit 31 are each constructed with a microcontroller and have an RS485 bus interface, if necessary voltage converters for 5 V and 3.3 V, a program memory, a non-volatile data memory, a RAM and potential-free inputs and outputs. Also one

Real-time clock (RTC) can be provided, optionally also a display and buttons. The donor logic unit 22, 23 and the machine logic unit 31 are sheathed watertight. Dire electrical connections are accessible via watertight, preferably polarity-proof, sockets and / or plugs.

In this embodiment, the user interface 1 is spatially separated from the donor devices 2, 3 and the machine logic unit 31. In an alternative embodiment, the user interface 1 may also be integrated into the dispenser devices 2, 3.

The units connected to the power and communication bus, namely the user interface 1, the dispenser devices 2, 3 and the machine logic unit 31 are configured as a master-slave system with the user interface 1 as the master controlling the remaining units. In an alternative embodiment, e.g. also the machine logic unit 31 may be configured as a master and the user interface 1 as a slave.

The control algorithms 22a, 23a of the donor logic units 22, 23 operate as described in detail above and are configured as fuzzy logic controllers. The fuzzy logic controller implements two separate algorithms. The first algorithm determines the stability of the determined actual substance value and is based on the knowledge that, depending on the type of dishwasher, e.g. Hood machine or belt machine, but also on the size of the machine, the installation situation of the hose connection 20 and the Leitwertsonde 34 in the dishwasher, the positioning of the suction for the washing pump motor 28 and the dynamics in the wash liquor a more or less sluggish system Mixing of the rinse liquor arises. In order to achieve a good control in this inert system, the fuzzy logic controller only regulates the difference between the desired value of the substance and the actual value of the substance if it has determined the actual substance value to be sufficiently stable. This determination is carried out by always taking the last x (eg 16) measured values of the actual substance conductance as the basis for calculating the mean value from the current point in time and determining a bandwidth which is a% (eg 10%) above and b% (eg 10%). below the mean. If y (e.g., 10) values within the bandwidth of the last x measurements used for averaging are taken, then the actual bulk factor is considered sufficiently stable. The sampling rate is e.g. 1 measurement / sec. This method is shown in the graph of FIG.

The second algorithm in the fuzzy logic controller takes care of the amount of substance that needs to be dosed. This is done on the basis of the duration of the delivery of a

Test dosage having a certain time value "X", e.g. 250 ms. After the stabilization of the new actual substance conductivity of the rinsing liquor, the difference between the desired substance value and the actual substance value is calculated back to the still necessary duration of delivery of the substance by means of a final calculation. Thus, a very accurate dosage and precise achievement of the target material conductivity is possible. Since this works in every dosing process, any changes in the water pressure, the temperature, the consistency of the substance and the level of the substance in the container are taken into account.

Each dispenser device 2, 3 has, near its substance inlet 2a, 3a, an RFID reader 2h, 3h with which information located in an RFID tag 24c, 25c attached to the container 24a, 25a can be read. This information contains a substance identification and substance characteristics, such as a standard conductivity, a standard conductivity of water to be supplied to the substance, a standard water hardness of water to be supplied to the substance, and a balance factor for deviations of the standard value between the standard water hardness and the actual water hardness. The information read by means of the RFID reader 2h, 3h is forwarded to the control algorithm 22a, 23a and taken into account by it as a control parameter in the control.

Claims (17)

Claims 1. A dispensing device (2, 3) for metered dispensing of chemical substances stored in containers (24, 25) to a dishwashing machine (4) or washing machine, having a substance inlet (2a, 3a) connected to an outlet (24a , 25a) of a container (24, 25) is connectable, which is a chemical substance, such as a cleaning agent, products for disinfection, water treatment or a rinse aid, said dispenser having a connectable to the dishwasher or washing machine substance outlet (2b, 3b), from which the substance is discharged, and a donor logic unit (22, 23) comprising a control algorithm (22a, 23a) which controls the dosage of the chemical substance (24b, 25b) to be delivered by the dispenser, wherein the control algorithm (22a, 23a) doses the delivery of the chemical substance (24b, 25b) such that the Is the material conductivity of the mixture of the chemical substance dispensed and water in the dishwasher (4) or washing machine is approximated to a desired substance conductivity, characterized in that the control algorithm (22a, 23a) adapts the desired substance conductivity by a predetermined standard Conductivity, a given standard water conductivity for zuzuführendes water, an actual water conductivity of zugeführ water, a given standard water hardness for water to be supplied, an actual water hardness of the water supplied, a compensation factor for the standard material conductivity for deviations between the standard water hardness and the actual water hardness and optionally includes an adjustable correction factor as a control parameter, wherein the Targeted substance conductivity is preferably calculated according to the following formula: Targeted material conductivity = correction factor x (standard substance conductivity - standard conductivity + actual water conductivity) x balancing factor (Isl-water hardness-Slandard Wasserhärle) 2. dispenser device (2, 3) according to claim 1, characterized in that the control algorithm (22a, 23a) of the donor logic unit (22, 23) is configured as a fuzzy logic controller. 3. dispenser device (2, 3) according to claim 2, characterized in that the fuzzy logic controller determines the stability of the determined Istleitleitwerte and only then corrects the difference between the setpoint and the actual conductivity, if he the actual substance as fulfilling a stability criterion, whereby the determination of the stability of the determined actual substance conductance value is carried out by taking the mean value of the last x measured values of the actual substance conductance from the current time and determining a bandwidth which is a% above and b% below that Is averaged, and then it is checked whether of the measurements used for averaging, y values (x> y) are within the bandwidth, which is considered to satisfy the stability criterion. 4. dispenser device (2, 3) according to claim 2 or 3, characterized in that the fuzzy logic controller calculates the dosage of the substance to be dispensed on the basis of the duration of the delivery of a test dosage by taking the difference between the target value of material and actual Value of the substance by means of a final calculation from the duration of the delivery of the test dosage to the still necessary duration of the current delivery of the substance. 5. dispenser device (2, 3) according to any one of the preceding claims, characterized in that the dispenser device near its substance inlet has an RFID reader (2h, 3h), with the in an on the container (24, 25) mounted RFID Tag (24c, 25c) information is read, the information preferably a substance identification, such as a product and Fändercode, and substance characteristics, such as a standard conductivity, a standard conductivity of water to be supplied to the substance, a standard water hardness of the water to be supplied to the substance, and a standard substance value balance for deviations between the standard water hardness and the actual water hardness. 6. Container (24, 25) containing a chemical substance (24b, 25b) for dispensing to a dishwasher or washing machine, which container has an outlet (24a, 25a) with a substance inlet (2a, 3a) of a Dispenser (2, 3) is connectable, characterized in that the container (24, 25) has an RFID tag (24c, 25c) having a substance identification, such as a product and Fändercode, and substance characteristics, such as eg a standard conductivity, a standard baseline of water to be supplied to the substance, a standard water hardness of the water to be supplied to the substance, and a standard substance conductance balancing factor for deviations between the standard water hardness and the actual water hardness. 7. Dosing system for metered dispensing of containers (24, 25) stored chemical substances to a dishwasher (4) or washing machine, characterized by: at least one dispensing device (2, 3) according to one of claims 1 to 5, a machine logic unit (31) for controlling the operation of the dishwasher or washing machine; a user interface (1) having a display (10) and buttons (11); the dosing system being of modular design, the dispenser logic unit (22, 23) contained in each dispenser (2, 3) being spatially separated from the machine logic unit (31), preferably installed in the dishwasher (4) or washing machine, wherein the machine logic unit (31) communicates with sensors (34) in the dishwasher or washing machine and monitors and controls pumps (27), motors (28), control inputs (E1-E3) and optionally the heating of the dishwasher or washing machine, the machine logic unit ( 31) has a power supply (31a) for converting electrical mains voltage into low voltage, in particular 12 volts or 24 volts DC, wherein the at least one donor logic unit (22, 23) and the machine logic unit (31) are interconnected by means of a power supply and communication bus , the power supply lines with the low voltage generated by the power supply and data lines for communication between the st has a donor logic unit and the machine logic unit. Dosing system according to claim 7, characterized in that the user interface (1) is configured as a local unit separate from the dispenser device (2, 3) and from the machine logic unit (31) connected to the power and communication bus. 9. dosing system according to claim 7 or 8, characterized in that the connected to the power supply and communication bus units (1, 2, 3, 31) are configured as a master-slave system, in which a unit, preferably the user interface (1), defined as the parent control that controls the remaining units. 10. Dosing system according to one of claims 7 to 9, characterized in that the machine logic unit (31) transmits measured values of the sensors (34, 35), with which it is connected, to the donor logic unit (22, 23). 11. Dosing system according to one of claims 7 to 10, characterized in that the dispenser device (2, 3) by means of a valve (2d) or pump from the Spenderlogikeinheit (22, 23) controlled water supply line (2c) to the in the connected container Dissolve located chemical substance with water and / or to mix, preferably in the water supply with the donor logic unit kommuni zierender water meter (2 e) is installed. 12. dosing system according to claim 11, characterized in that the machine logic unit (31) having a tank (32) of the dishwasher (4) or washing machine communicating liquid temperature sensor (35), wherein the donor logic unit (22, 23) only then for dosing the Substance activated when the liquid in the tank (32) has or exceeds a predetermined minimum temperature. 13. Dosing system according to one of claims 7 to 12, characterized in that the dispenser device (2, 3) in the path of the substance through the dispenser a conductivity sensor (2f, 3f) for measuring the conductance of the chemical substance to be delivered or the mixture to be delivered Substance with the supplied water has. 14. Dosing system according to one of claims 7 to 13, characterized in that the dispenser logic unit (22, 23) and the machine logic unit (31) are sheathed waterproof and their electrical connections via waterproof, preferably reverse polarity, jacks and / or plugs are accessible, wherein Particularly preferably, the electrical connections are optoelectronic or galvanically isolated. 15. Dosing system according to one of claims 7 to 14, characterized in that the power supply and communication bus, a computer, in particular a personal computer, a notebook or a tablet computer is connectable, on which a monitoring, maintenance or configuration program of Dosing system is executable. 16. Dosing system according to one of claims 7 to 15, characterized in that a remote maintenance module of the dosing system can be connected to the power supply and communication bus. 17. Dosing system according to one of claims 7 to 16, characterized in that the substance outlet (2b, 3b) of the dispenser device has a connection for connection to a line (33) from a substance outlet of a further dispenser device.