EP4437924A1 - Dosing device - Google Patents

Abstract

The invention relates, inter alia, to a dosing device (10) for dosing powdered or solid media (12), such as cleaning agents or disinfectants, and for supplying them in dissolved form (24) to a washing or cleaning system (14), e.g. to a commercial dishwasher, comprising a carrier (21), in particular a cartridge carrier, to which a container (11), in particular a cartridge, with powdered or solid medium (12) can be attached, wherein the carrier (21) or the container (11) comprises a grid (23) which prevents the medium (12) from escaping from the container (11), and comprising a spray nozzle (20) with which, controlled by a control (15) of the dosing device (11), water (50) can be dispensed to dissolve the medium (12), wherein the medium dissolved in water (50) passing through the grid (23) (24) of the washing or cleaning system (14) via a feed device (20, 27, 28, 35), characterized in that the dosing device (10) comprises a switching device (57) which can be addressed by the controller (15) and which has at least two different switching states for operating the spray nozzle (20) in different operating modes.

Description

The patent application relates to a dosing device according to the preamble of claim 1.

Such dosing devices are known and are manufactured and sold by the applicant. For example, reference is made to the German patent application DE 10 2020 116 298 A1 a group of persons associated with the applicant, which shows a dosing device with the features of claim 1.

Reference is also made to the subsequently published German patent application DE 10 2020 114 022 A1 the group of persons associated with the applicant, which also discloses a generic dosing device.

The known dosing device comprises a spray nozzle with which water can be dispensed to dissolve a medium. The dispensing of water through the spray nozzle is controlled by a control device of the dosing device. This can, for example, initiate the appropriate dispensing of water after receiving a request signal from the target device, i.e. from the washing or cleaning system.

The water is released from the spray nozzle under a certain pressure and directed vertically upwards or diagonally upwards. The length of the spray jet and/or the spray angle can be adjusted accordingly.

The spray of water hits a grid or sieve that is arranged on the container or on the carrier.

The grid passes through an opening in the container or carrier. The grid prevents the medium in its initial state, i.e. in undissolved form, from passing through the grid. When water hits the grid, the water can dissolve or partially dissolve the medium. The dissolved medium can escape through the openings in the grid together with the water.

The medium dissolved in water, i.e. the media solution, is collected, in particular by a collecting device and fed to the target device via a feeding device, i.e. via fluid lines, if necessary with the aid of a pump.

Based on the previously described prior art, the object of the invention is to further develop the known dosing device in such a way that it ensures proper execution of dosing processes over a long service life of the dosing device with a simple construction.

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 dosing device comprises a switching device that can be addressed by the controller and has at least two different switching states for operating the spray nozzle in different operating modes.

The principle of the invention essentially consists in equipping the dosing device with a switching device that can operate the spray nozzle in two operating modes.

In both operating modes, the spray nozzle is designed to dispense water. However, the way in which the water is dispensed is different in the two operating modes of the spray nozzle.

According to the invention, it is provided that the spray nozzle can be operated in at least two different operating modes. For this purpose, a switching device is provided which has at least two different switching states.

The switching device can be addressed by the control system, in particular can be switched. In a first connected state of the switching device, the spray nozzle can be operated in a first switching mode and in a second switching state of the switching device, the spray nozzle can be operated in a second operating mode.

In particular, it can be provided that a first operating mode of the spray nozzle comprises a spray operation of the spray nozzle. In the spray operation of the spray nozzle, the grid can be exposed to water in order to spray the medium and to obtain a cleaning agent solution or a disinfectant solution in the conventional manner.

In a second operating mode of the spray nozzle, the spray nozzle can be operated in a rinsing mode. The spray nozzle also releases water in rinsing mode. However, in this second operating mode, it supplies water to a collecting device without applying pressure to the grid.

This offers the possibility of the dosing device causing the spray nozzle to release water without dissolving medium. This makes it possible to provide pure - clean - water. This can be used in particular to flush parts, elements or lines of the dosing device, or the supply lines to the target device or, if applicable, a pump arranged downstream of a collecting device.

Areas of the dosing device, such as the spray nozzle itself, can also be rinsed and cleaned. Chemical residues can be removed in this way - especially on a regular basis.

Advantageously, the spray nozzle can be flushed regularly, for example once a day or according to specified time intervals, or even on request.

The invention recognizes that flushing can be achieved in the simplest possible way using simple means, in particular without arranging an additional, separate water dispensing device, simply by controlling the spray nozzle in a second operating mode, a flushing operating mode.

The dosing device according to the invention not only allows a rinsing operation, but also provides the dosing device or downstream devices with pure water, i.e. water that is free of medium, for other purposes. For example, the water released by the spray nozzle in the second operating mode, which is free of medium, can also be used for calibration purposes.

The metering device according to the invention comprises a switching device. The switching device can be designed separately from a control of the metering device and connected to it. However, the switching device can also be part of the control or, for example, be integrated into the control.

The switching device may comprise its own processor or, alternatively, it may comprise a processor which is part of the control of the dosing device.

The switching device can be housed in a housing. In a variant of the invention, it can be housed in a housing separate from a housing of the dosing device. Alternatively, it can also be housed in the housing in which the control of the dosing device is housed.

The present invention relates to such dosing devices in which the medium is initially not in a liquid starting form, but as a solid, i.e. in a solid starting form, e.g. as a powder, granulate, block, possibly also as a pressed cleaner or a cleaner cast into a block.

The dosing devices that dose such media are also called solid dosing devices.

A target device within the meaning of the present patent application can be a commercial dishwasher, such as those used in canteens, for example. However, the target device can be any suitable dishwasher with which dishes and cutlery or other objects to be cleaned can be cleaned.

The invention also encompasses target devices provided by a washing machine, e.g. a textile washing machine, in particular a commercial washing machine.

Other cleaning devices in which media in the form of solids are to be supplied are also included as target devices in the invention.

The invention includes dosing devices with which only a specific medium from a specific container is supplied to a target device.

The invention also includes dosing devices with which several, possibly different media, can be conveyed from one or more containers to one or more target devices.

The control of the dosing device can comprise a processor or be formed by a processor, or comprise another computing unit. The control of the dosing device can, insofar as the dosing device has a pump or cooperates with a pump, coincide with a control unit of the pump or be provided separately by the pump but connected to the pump.

At least one switching device can be addressed by the control of the dosing device. The switching device can, for example, comprise at least one valve that can open or close a water pipe. The water pipe is preferably a fresh water pipe, but in some cases also a service water pipe.

The valve can be provided, for example, by a solenoid valve or a solenoid valve.

The control can open and/or close the valve via the switching device.

By controlling the valve, a predetermined amount of water can be dispensed from the water pipe via a dispensing opening. The dispensing opening is provided by a spray nozzle. A spray nozzle in the sense of the present invention is any type of dispensing device which is at least capable of directing one or more spray jets, or a spray mist, or the like, towards the grid.

The dosing device according to the invention includes a support for one container, or possibly also a support for several containers. The support can be attached to the wall, for example.

A carrier in the sense of the present patent application is a device to which the container with medium can be attached. The carrier has positioning surfaces or receiving surfaces. If necessary, the container can be fastened to the carrier - in particular detachably. In this case, a carrier according to the invention also has fastening surfaces for the container.

According to the invention, the dosing device has a switching device. The switching device can, for example, comprise at least two valves, i.e. a first valve and a second valve. The two valves can be controlled independently of one another. With the first valve, a first line branch of the water supply line can be opened or closed, and with the second valve, a second line branch of a water supply line can be opened or closed independently of the first line branch.

If both valves are closed, no water reaches the spray nozzle. It is not in operation.

In the first switching state of the switching device, both valves are open. Water then reaches the spray nozzle at the pressure of the domestic water network.

In a second switching state of the switching device, only one of the two valves is open. This blocks one of the two line branches and opens the other of the two line branches.

In particular, if the two pipe branches each have a smaller pipe cross-section than the pipe of the domestic water network, the water flow, i.e. the volume flow that reaches the spray nozzle, is reduced when the switching device is in a second switching state.

Therefore, when the switching device is in a second switching state, the water comes out of the spray nozzle at a lower pressure. No spray jet or spray area can form on the outlet side of the spray nozzle that reaches the grille. Instead, due to the lower pressure - caused by the second switching state and the smaller line cross-sections - water is released from the spray nozzle. However, this either flows out of the spray nozzle without being able to form a spray jet or spray area at all, or a spray jet or spray area is formed, but due to the lower pressure it is so short that it does not reach the grille.

In any case, the spray nozzle in its second operating mode causes water to be released, but without reaching the grid, i.e. without additional medium being released.

In one variant of the invention, the switching device comprises only one valve and an additional drive. The drive can be used, for example, to rotate the spray nozzle or to move a shielding element. In this variant, the switching device, controlled by the control of the dosing device, can address the valve and the drive.

According to an advantageous embodiment of the invention, a first operating mode of the spray nozzle comprises a spray operation of the spray nozzle in order to apply water to the grid. According to this advantageous embodiment of the invention, the spray nozzle can ensure a conventional spray operation in its first operating mode.

According to a further advantageous embodiment of the invention, a second operating mode of the spray nozzle includes a rinsing operation of the spray nozzle in order to supply water to a collecting device without applying pressure to the grid. According to this advantageous embodiment of the invention, the spray nozzle can ensure a rinsing operation in its second operating mode. This rinsing operation provides that the spray nozzle releases water. The water is supplied to the collecting device without applying pressure to the grid. This provides pure water free of medium. This enables chemical residues in the pipe path to be dissolved.

According to a further advantageous embodiment of the invention, the switching device supplies the spray nozzle in its first switching state with a first, higher volume flow and in its second switching state with a second volume flow that is lower than the first volume flow. This embodiment of the invention enables the spray nozzle to be supplied with different volume flows in different operating states.

According to a further advantageous embodiment, the dosing device is arranged externally of the target device, i.e. separately from the target device, in particular externally of the dishwasher. This embodiment of the invention enables, for example, the target device, in particular the dishwasher, to be retrofitted and a supply several target devices, in particular several dishwashers, with only one dosing device.

According to a further advantageous embodiment of the invention, the control of the dosing device is designed to be able to communicate with the washing and cleaning system. This embodiment of the invention enables an automated dosing process in cooperation with the target device.

According to a further advantageous embodiment of the invention, the switching device comprises two valves that can be addressed by the control system. This embodiment of the invention enables a simple construction.

According to a further advantageous embodiment of the invention, different line branches of a supply line leading to the spray nozzle can be opened or closed with the two valves. This embodiment of the invention enables a simple construction of the dosing device.

According to a further advantageous embodiment of the invention, the switching device comprises a valve that can be addressed by the control system and that can assume at least two different positions and that supplies the spray nozzle with different volume flows in different positions. This embodiment of the invention enables a particularly simple construction and control of the valve.

In this embodiment, a valve in a first position can keep the supply line to the spray nozzle completely open and in a second position the supply line, for example by reducing the cross-section. This reduces the volume flow.

It is also conceivable that the controllable valve can assume a third position in which it completely closes the line cross-section. In this design, only a single valve with at least three different positions is provided.

According to a further advantageous embodiment of the invention, the switching device can be used to address a displaceable shielding element which, in a first position, opens a path between the spray nozzle and the grid for the water and which, in a second position, blocks this path. This embodiment of the invention makes it possible to reliably prevent water from reaching the grid when the spray nozzle is in the rinsing mode.

According to a further advantageous embodiment of the invention, the switching device can be used to control a drive with which the spray nozzle can be moved, in particular rotated, between a first position and a second position. This embodiment of the invention makes it possible to particularly reliably prevent water from reaching the grid when the spray nozzle is in the rinsing mode.

This variant allows the spray nozzle to be rotated by operating the drive, or to adopt an orientation such that it faces away from the grid, for example.

According to a further advantageous embodiment of the invention, the spray nozzle in its first position applies water to the grid and in its second position supplies water to a collecting device without applying water to the grid. This embodiment of the The invention enables a particularly reliable prevention of water from the spray nozzle reaching the grid during rinsing operation.

According to a further advantageous embodiment of the invention, the dosing device has a collecting device arranged below the grid, e.g. a funnel, for collecting the medium dissolved in water. This embodiment of the invention enables recourse to an essentially conventional design of a dosing device and, if necessary, the use of conventional components.

According to a further advantageous embodiment of the invention, the feed device comprises a pump, in particular a hose pump, which can be addressed in particular by the control of the dosing device. This embodiment of the invention enables a particularly convenient mode of operation.

The invention further relates to a method according to claim 15 for operating a dosing device.

Based on the prior art described at the outset, the object of the invention is to provide a method by which proper operation of the dosing device is ensured over long periods of time.

The invention solves this problem with the features of claim 15.

In order to avoid repetition, reference is made to the previous statements in claims 1 to 14 with regard to the explanation of the features and the meaning of the terms used in the subject matter of claim 15.

According to a further advantageous embodiment of the invention, step c) is carried out regularly, in particular automatically.

Further advantages of the invention emerge from the uncited subclaims, as well as from the following description of the embodiments shown in the drawings.

Fig. 1

in einer schematischen, blockschaltbildartigen Prinzipdarstellung ein erstes Ausführungsbeispiel einer erfindungsgemäßen Dosiereinrichtung, bei der die Wasserzuführleitung zu der Sprühdüse zwei Leitungszweige aufweist, die jeweils über gesonderte Ventile öffenbar und sperrbar sind,

Fig. 2

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Dosiereinrichtung in einer Darstellung gemäß Fig. 1, die zusätzlich eine im Leitungsweg zwischen der Auffangvorrichtung und dem Zielgerät angeordnete Pumpe ausweist,

Fig. 3

in einer schematischen, blockschaltbildartigen Darstellung das Ausführungsbeispiel der Figur 1 etwa gemäß Teilkreis III in Figur 1, mit in der ersten Betriebsart, dem Sprühbetrieb, operierender Sprühdüse,

Fig. 4

das Ausführungsbeispiel der Figur 3 mit in zweiter Betriebsart, dem Spülbetrieb, operierender Sprühdüse,

Fig. 5

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Dosiereinrichtung in einer Darstellung gemäß Figur 1, wobei ein Antrieb zur Verlagerung der Sprühdüse vorgesehen ist,

Fig. 6

das Ausführungsbeispiel der Dosiereinrichtung gemäß Figur 5, etwa gemäß Teilkreisdarstellung VI in Figur 5, mit in erster Betriebsart befindlicher, einen Sprühbetrieb durchführender Sprühdüse,

Fig. 7

das Ausführungsbeispiel der Figur 6 mit in zweiter Betriebsart operierender Sprühdüse, die einen Spülbetrieb durchführt,

Fig. 8

in einer Darstellung gemäß Figur 1 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Dosiereinrichtung mit einem Abschirmelement, das in Nichtgebrauchsposition befindlich ist,

Fig. 9

das Ausführungsbeispiel der Figur 8 in vergrößerter Darstellung, etwa gemäß Teilkreis IX in Figur 8, wobei das Abschirmelement in Nichtgebrauchsposition befindlich ist und die Sprühdüse in ihrer ersten Betriebsweise einen Sprühbetrieb ermöglicht,

Fig. 10

das Ausführungsbeispiel der Dosiereinrichtung gemäß Figur 9, wobei sich das Abstellelement in Gebrauchsposition befindet und die Sprühdüse - einer zweiten Betriebsart entsprechend - einen Spülbetrieb durchführt,

Fig. 11

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Dosiereinrichtung in einer Darstellung gemäß Figur 1, wobei ein Mehrstellungsventil vorgesehen ist, das sich gemäß Figur 11 in einer ersten Position befindet, in der es den Wasserdurchtritt nicht behindert,

Fig. 12

das Ausführungsbeispiel der Figur 11, in vergrößerter Darstellung gemäß Teilkreis XI in Figur 10, mit in erster Position befindlichem Steuerventil, zur Bereitstellung eines Sprühbetriebes, und

Fig. 13

das Ausführungsbeispiel der Figur 12 mit in einer zweiten Gebrauchsposition befindlichem Steuerventil, in dem es den Leitungsquerschnitt teilweise reduziert, um einen Spülbetrieb der Sprühdose zu erreichen.

The drawings show:

Fig. 1

in a schematic, block diagram-like principle representation of a first embodiment of a dosing device according to the invention, in which the water supply line to the spray nozzle has two line branches, each of which can be opened and closed via separate valves,

Fig. 2

another embodiment of a dosing device according to the invention in a representation according to Fig. 1 , which additionally has a pump arranged in the line path between the collecting device and the target device,

Fig. 3

in a schematic, block diagram-like representation the embodiment of the Figure 1 approximately according to subcircle III in Figure 1 , with the spray nozzle operating in the first operating mode, the spray mode,

Fig. 4

the embodiment of the Figure 3 with spray nozzle operating in second operating mode, the rinsing mode,

Fig. 5

another embodiment of a dosing device according to the invention in a representation according to Figure 1 , whereby a drive is provided for moving the spray nozzle,

Fig. 6

the embodiment of the dosing device according to Figure 5 , approximately according to the partial circle representation VI in Figure 5 , with the spray nozzle in the first operating mode performing a spray operation,

Fig. 7

the embodiment of the Figure 6 with a spray nozzle operating in a second operating mode, which carries out a rinsing operation,

Fig. 8

in a representation according to Figure 1 another embodiment of a dosing device according to the invention with a shielding element that is in the non-use position,

Fig. 9

the embodiment of the Figure 8 in enlarged view, approximately according to circle IX in Figure 8 , wherein the shielding element is in the non-use position and the spray nozzle in its first operating mode enables a spray operation,

Fig. 10

the embodiment of the dosing device according to Figure 9 , wherein the storage element is in the use position and the spray nozzle - according to a second operating mode - carries out a rinsing operation,

Fig. 11

another embodiment of a dosing device according to the invention in a representation according to Figure 1 , whereby a multi-position valve is provided which is adjustable according to Figure 11 in a first position in which it does not hinder the passage of water,

Fig. 12

the embodiment of the Figure 11 , in enlarged view according to pitch circle XI in Figure 10 , with in the first place Position control valve to provide spray operation, and

Fig. 13

the embodiment of the Figure 12 with a control valve in a second operating position in which it partially reduces the line cross-section in order to achieve a rinsing operation of the spray can.

Embodiments of the invention are described by way of example in the following description of the figures, also with reference to the drawings. For the sake of clarity - even where different embodiments are concerned - identical or comparable parts or elements or areas are designated with identical reference symbols, sometimes with the addition of lower case letters.

Features that are described, illustrated or disclosed only in relation to one embodiment can also be provided in any other embodiment of the invention within the scope of the invention. Such modified embodiments are also included in the invention, even if they are not shown in the drawings.

All disclosed features are essential to the invention in themselves. The disclosure of the application hereby also fully includes the disclosure content of the associated priority documents (copy of the prior application) as well as the cited publications and the described devices of the prior art, also for the purpose of to include individual or multiple features of the subject matter disclosed therein in one or multiple claims of the present application. Such modified embodiments are also included in the invention, even if they are not shown in the drawings.

In the following, based on the Fig. 1 a first embodiment of a dosing device 10 according to the invention will be explained and described:
The metering device 10 according to the invention comprises a controller 15, which is connected to a first valve 16a and a second valve 16b via control lines 44a1, 44a2. The valves 16a, 16b can each be provided by a magnetic valve, in particular a solenoid valve, for example. The valves 16a, 16b are connected to a domestic water mains connection 18 via a water line 17a - if necessary with the interposition of a pipe separator (not shown).

The valves 16a, 16b can be opened and closed independently of each other.

The water pipe 17a splits into two pipe branches 60a, 60b in the area of a branching point. These lead to the two valves 16a, 16b. Downstream, the two pipe branches 60a, 60b are brought together again at a junction point to form a common pipe 17b.

The cross-sections of the lines are dimensioned as follows: The common lines 17a, 17b have an equal or substantially equal, larger cross-section.

The two line branches 60a, 60b have an identical or substantially identical line cross-section, which is smaller than the line cross-section of the common line sections 17a, 17b.

The two valves 16a, 16b and the electrical signal lines 44a1 and 44a2, which lead to the control 15, as well as possibly further parts and elements not shown, are components of a switching device 57.

If the switching device 57 is in a non-use state, both valves 16a, 16b are closed. The two line branches 60a, 60b are blocked and the spray nozzle 20 does not receive any water.

The control 15 can, for example after receiving a request signal from a target device 13 via the signal line 44b, receive a dosing command and address the switching device 57. The switching device 57 can now be set by the control 15 to a first switching state and open both valves 16a, 16b. In this case, the spray nozzle 20 is supplied with water via the two line branches 60a, 60b. A spray jet is generated which in Figure 3 can be seen. The spray jet is dimensioned such that the water 50 emitted by the spray nozzle 20 acts on a grid 23 or sieve 23 and can dissolve medium 12 located in the container 11. The spray nozzle 20 is now operated in a first operating mode.

The controller 15 can cause the valves 16a, 16b to be open for a certain, predetermined period of time and ensure that a chemical solution in the required amount can be supplied to the target device 13.

The control device 15 can also transfer the switching device 57 into a second switching state. In the second switching state, for example, only the first valve 16a is open and the second valve 16b is closed.

Alternatively, in the second switching state of the switching device 57, the second valve 16b can also be opened and the first valve 16a closed. In the second switching state, the switching device 57 ensures that water can only flow through one of the two line branches 60a, 60b, whereby, as mentioned above, the line cross-section of each line branch 60a, 60b is smaller than the line cross-section of the common water line 17a, 17b.

This means that only a smaller volume flow of water reaches the spray nozzle 20, i.e. less water per unit time. Since the line cross-section in the common line section 17b is larger than the line cross-section of the line branch 60a, the pressure when the water 50 exits the spray nozzle 20 is also lower. As a result, a spray pattern such as in Figure 3 shown, do not form and a spray pattern is created according to Figure 4 .

The according Figure 4 Water 50 exiting from the spray nozzle 20 cannot reach the grid 23. The water 50 exiting from the spray nozzle 20 is therefore fed to a collecting device 26 without medium 12 being dissolved in the water 50. The spray nozzle 20 is operated here in a second operating mode, in a rinsing mode.

The water pipe 17b can be fixed in the area of the discharge opening 19 by means of a fastening device 40 on site, e.g. attached to the wall.

The dosing device 10 according to the invention also includes a holder 21 for a container 11. This holder is also referred to as a carrier 21 in this patent application. The container 11 is designed in the manner of a cartridge or bottle. Accordingly, the carrier 21 is also referred to as a cartridge carrier.

The container 11 is provided with an outlet opening 22 which in the state according to Fig. 1 downwards, towards a floor 48 of a building room. A grid 23 or a type of grid or sieve is arranged in the outlet opening 22. The grid 23 has openings. The grid 23 can be part of the carrier 21, or alternatively part of the container 11. The invention also encompasses a first grid 23 being provided on the container 11 and a further grid 23 on the carrier 21.

The container 11 contains a medium 12, in particular a solid, e.g. in powder form or in block form. This can be any chemical, in particular a cleaner that is required for a cleaning or rinsing process. The invention also particularly covers when the medium 12 comprises a powder or solid disinfectant that is required for washing or cleaning processes.

With the dosing device 10 according to the invention, in the first operating mode of the spray nozzle 20, a desired amount of medium 12 can be released and transported to a target device 13. The target device 13 is in the embodiment of the Fig. 1 provided by a dishwasher 14. It is clear that the target device 13 shown in the figures in the form of a dishwasher 14 can also be formed by another target device, i.e. any washing and/or cleaning system.

Indicated on the target device 13 is a program selection switch 45a or a start switch 45b, and a target device-side control 41. The control 41 is connected to the control 15 of the dosing device 10 via a control line 44b.

In the example shown, the Fig. 1 that the dishwasher 14 has one or more dish trolleys 46a, 46b or cutlery drawers in which dishes 47 to be cleaned are shown. The dishwasher 14 can be a conventional or a household dishwasher or in particular a commercial dishwasher 14.

The invention also encompasses the case where several target devices 13 are connected to the dosing device 10, although this is not shown in the figures.

Instead of a dishwasher 14, the target device 13 can also be provided by a washing machine or by another cleaning device or cleaning machine.

In the embodiment of the Fig. 1 In the first operating mode, water 50 is emitted from the spray nozzle 20 so that the grid 23 is sprayed. The spray nozzle 20 is arranged below the outlet opening 22 and also below the grid 23 and at a distance from it.

Due to the pressure in the water pipe 17b when the spray nozzle 20 is in the first operating mode, the water 50 can be sprayed upwards and to the side, as in Fig. 1 As shown schematically, they are delivered in a spray jet.

The water 50 emerging from the discharge opening 19 of the spray nozzle 20 acts on the grid 23 and can partially also pass through the grid openings (not shown) and come into contact with the medium 12. The medium 12 can be dissolved as a result of the ingress of water 50 and drip down, as shown by the drops 24a, 24b, 24c, 24d. The drops illustrate a media solution 24, for example a cleaning solution 24, which is to be supplied to the target device 13, in particular at a predetermined time and in a predetermined amount.

It should be noted that the control 15 of the dosing device 10 particularly responds to the switching device 57 in order to spray the grid 23 when a corresponding command has been received from the target device 13.

How Fig. 1 shows, a collecting device 26 is arranged below the spray nozzle 20 and below the outlet opening 22 of the container 11.

This comprises a funnel 28 which is connected to the target device 13 via a hose line 27.

In the dosing device 10 according to the invention, a special positioning and design of the funnel 28 can be provided:
According to Fig. 1 a free edge of the funnel is designated overall by the reference numeral 29.

This free edge 29 of the funnel 28 is evidently Fig. 1 both at a distance 32 from the grid 23 and at a distance 31 from the spray nozzle 20.

The funnel 28 is thus arranged without contact with the discharge opening 19 and without contact with the grid 23.

At the same time, the free edge 29 of the funnel 28, as well as the funnel 28 as a whole, is arranged so as to be non-contact with the water pipe 17b and also non-contact and spaced apart from the holder 21 for the container 11 and also spaced apart and non-contact with the container 11 and spaced apart and non-contact with the holder 21 for the container.

As a result of this spacing, any direct contact between the collecting device 26 and the discharge opening 19 of the spray nozzle 20 is reliably prevented. Bacteria that can move by crawling along the collecting device 26 from the target device 13 via the hose line 27, e.g. on the outside thereof, cannot reach the discharge opening 19 and can therefore never contaminate the water line 17b.

It is therefore not absolutely necessary, for example, to use a dosing device according to Fig. 10 A pipe separation device must be provided upstream or downstream of the valves 16a, 16b.

It is clear that the invention also encompasses further embodiments which comprise other collecting devices.

In the embodiment of the Fig. 1 the funnel 28 has a funnel opening 52 with a particularly large clear width 30.

As can be seen from the presentation of the Fig. 1 The opening width or clear width 30 of the funnel 28 is dimensioned such that it Dimensions 33 of the outlet opening 22 exceeds, in particular significantly exceeds.

This ensures that any portions of water 50 and cleaning fluid 24 actually reach the inner surfaces or inner walls 49 of the funnel 28.

A further embodiment of a dosing device 10 according to the invention is shown in Fig. 2 shown.

To avoid repetition, the corresponding parts, elements and areas of the embodiment may be referred to as Fig. 2 to the corresponding previous passages to the description of the embodiment of the Fig. 1 be referred to.

In the embodiment of the Fig. 2 but there is the following difference:
The collecting device 26 comprises - as in the embodiment of the Fig. 2 - a funnel 28 which is connected via a hose line 27 to an inlet 38 for the hose line 27 on the target device 13.

In the embodiment of the Fig. 2 a pump 35, in particular a hose pump, is arranged between the collecting device 26 and the inlet 38, in particular between the funnel 28 and the inlet 38.

In the embodiment of the Fig. 2 The pump 35 has an inlet 36 and an outlet 37. The pump has a motor 42 which drives a rotor 51 which is arranged in a conventional manner with its Rollers propagate, presses or squeezes the hose section 54 running inside the pump 35 and in this way conveys the cleaning solution 24 through the pump 35 to the target device 13.

The pump 35 comprises in the embodiment of the Fig. 2 a control unit 34. This is connected to the controller 15 via a control line 44c.

In the embodiment of the Fig. 2 the control unit 34 of the pump 35 can also take over the tasks of the controller 15, or the controller 15 can merge with the controller 34 or be combined into one component. The control unit 15 can also be arranged inside the pump 35 or on the pump 35.

The pump 35 can in particular also be a component of the metering device 10 according to the invention.

In particular, it can be provided that the controller 15 and the pump 35 are housed together in one housing.

The metering device 10 according to the invention includes embodiments that include a pump 35 and also embodiments that do not require a pump 35. The metering device 10 according to the invention includes embodiments in which the controller 15 is arranged together with the pump 35 - if present - in a common housing. The metering device according to the invention also includes embodiments in which the controller 15 is arranged in a housing separate from the housing of the pump 35.

The metering device 10 according to the invention includes embodiments in which several valves 16a, 16b and/or only one valve 16 and/or a drive 61 to be described later and/or a drive 69 to be described later and/or a shielding element 66 to be described later are part of the metering device 10. The metering device 10 according to the invention also includes embodiments in which the previously described elements are merely assigned to the metering device 10 or interact with the metering device 10. Likewise, the previously described elements can be arranged within a housing in which the control 15 is also located, or arranged externally of such a housing.

In the embodiment of the Fig. 1 a minimum height MH is provided between the lower end 55 of the funnel 28 and the inlet 38 on the target device 13. This minimum height, or fall distance, must be complied with on site to ensure that the media solution, for example cleaning solution 24, can actually be fed to the target device 13 in the prescribed manner.

In the embodiment of the Fig. 2 Due to the arrangement of a pump 35, such a minimum height MH can no longer be maintained.

Here, it can be provided that the lower end 55 of the funnel 28 falls below a minimum height required in the state of the art with respect to the inlet 38.

The actual distance TA between the lower end 55 of the funnel 28 and the inlet 38 at the target device 13 can be determined Fig. 3 less than the minimum height according to Fig. 1 be.

The invention also encompasses the situation where the lower end 55 of the funnel 28 is arranged below the inlet opening 38 on the target device 13 or at the same height. However, the latter is not shown in the figures.

In the embodiment of the Fig. 2 the outlet 37 of the pump 35 is arranged below the inlet 38 on the target device 13.

This is also not absolutely necessary.

The outlet 37 of the pump 35 can also be arranged above the inlet 38 or at the same or approximately the same height as the inlet 38.

In the embodiment of the Fig. 1 and 2 the target device 13 is arranged on a base 48.

In further embodiments of the invention not shown, the target device 13 can also be arranged at a distance from the floor, possibly also mounted on the wall.

In the embodiment of the Fig. 2 the pump 35 is also arranged on the floor. In other embodiments of the invention not shown, the pump 35 can also be arranged on the wall, or hanging freely in the room, or at least spaced from the floor 48.

The invention further encompasses the fact that the dosing device 35 is fixedly arranged relative to the target device 13.

The embodiment of the Fig. 2 shows a pump 35 only schematically. The content of the present patent application is intended also the content of the following applications are included, which disclose further details of pumps usable in the context of this invention and other special features of dosing devices:
DE 10 2011 108 396 A1 , DE 10 2011 119 021 A1 , DE10 2011 122 921 A1 , WO 2013/075692 , DE 10 2012 012 913 A1 , WO 2014/000726 , DE 10 2013 008 973 A1 , DE 10 2013 022 329 A1 , DE 10 2014 002 560 A1 , DE 10 2014 010 126 A1 , EP 2 966 299 A1 , DE 10 2015 110 862 A1 , DE 10 2015 107 105 A1 , EP 3 091 114 A1 , DE 10 2015 107 976 A1 , DE 10 2016 102 829 A1 , DE 10 2017 114 767 A1 , DE 10 2017 103 168 A1 , DE 10 2016 125 928 A1 , DE 10 2017 114 665 A1 , DE 10 2018 106 045 A1 , DE 10 2018 110 155 A1 , DE 10 2018 113 644 A1 , DE 10 2018 122 651 A1 , DE 10 2020 107 555 A1 , DE 10 2020 106 712 A1 , DE 10 2020 107 558 A1 , DE 10 2020 113 828 A1 , DE 10 2020 115 590 A1 , DE 10 2020 116 298 A1 , DE 10 2020 114 022 A1 .

The disclosure content of all these applications for protection rights is hereby included in the disclosure content of the present patent application, also for the purpose of incorporating, if necessary, individual or several features of the aforementioned applications into the content of the present patent application, including into the content of the patent claims of the present application.

In the embodiment of the Fig. 2 the dosing device 11 can optionally also comprise a tank (not shown) for receiving and storing media solution 24, which is in particular connected upstream of the pump 35. Here, the medium 12 can be sprayed on in reserve and dissolved to provide a media solution 24. The media solution 24 is collected in the tank and stored until the target device 13 requests the media solution 24. The pump 35 can then convey the media solution 24 to the target device 13 in the desired amount.

In the examples of the Fig. 1 and 2 the collecting device 26 has a holder 56 which is intended, for example, for wall mounting, in particular to ensure a defined positioning of the funnel 28 relative to the holder 21 for the container 11.

In the embodiments of the invention according to the Fig. 1 and 2 the holder 21 for the container 11, the holder 56 for the collecting device 26 and the holder 40 for the discharge opening 19 can be provided separately from one another and each allow for on-site assembly.

However, the invention also encompasses the case where some or more of the mounting devices 21, 56, 40 are combined and provide a common or interconnected mounting surface.

The dosing device 10 according to the invention is also designed, for example, to cooperate with a washing or cleaning system 14 that cleans parts such as bottles, containers, boxes or the like.

Figure 3 shows the spray nozzle 20 in a first operating mode in which it ensures a spray operation. The switching device 57 is in a first switching state and both valves 16a, 16b are open. Water 50 flows through both line branches 60a, 60b. A conventional spray pattern can result at the spray nozzle 20, with the spray jet reaching as far as the grid 23 and dissolving medium 12. A media solution 24, schematically shown by drops 24a, 24b, 24c, drips into the collecting device 26.

In contrast, Figure 4 a second switching state of the switching device 27, in which the lower valve 16a is opened and the upper valve 16b is closed. Water 50 is only supplied to the spray nozzle 20 through the line branch 60a. The pressure is therefore lower, so that a Figure 4 changed spray pattern results: The spray jet no longer reaches the grille 23.

Schematically illustrated water 50 flows out of the discharge opening 19 of the spray nozzle 20 and is fed to the collecting device 26, represented by drops 25d to 25g.

Based on the examples of the Figures 5 to 7 an alternative embodiment of a dosing device 10 according to the invention is shown.

Here the Figures 5 and 6 the spray nozzle 20 in a first operating mode in which it emits water 50 with which the grid 23 is sprayed.

Figure 7 shows the nozzle 20 in a second operating mode in which it releases water 50 but supplies it directly to the collecting device 26 without impacting the grid 23.

For this purpose, in the embodiment of the Figures 5 to 7 It is provided that the spray nozzle 20 is connected to the water pipe 17b via a pivot bearing 62, such that a pipe section 71, which is firmly connected to the spray nozzle 20, can be rotated about an axis 72 relative to a fixed pipe section 73, which is firmly connected to the water pipe 72b. In order to set the nozzle 20 and the associated pipe section 71 in rotation, a drive 61 is provided. This is connected as a component of the switching device 57 via a Control line 44a3 is connected to the control 15 of the dosing device 10.

In this embodiment, the switching device 57 comprises only one valve 16 and the drive 61 as well as a displaceable spray nozzle 20 with pivot bearing 62 and rotatable line section 71. The switching device 57 also includes the control line 44a and the control line 44a3.

The switching device 57 may also include other parts or elements not shown.

The Figures 6 and 7 The control 15 (not shown) can move the switching device 57 into a first switching position according to Figure 6 or alternatively to a second switching position according to Figure 7 In these two switching positions, valve 16 is open.

In addition, the switching position 27 can be switched by the control 15 to a non-use position in which the valve 16 is closed. In this case, the spray nozzle 20 is not in operation.

Figure 6 shows the nozzle 20 and the line section 71 in a first operating position, corresponding to a first switching state of the switching device 57, in which the grid 23 is sprayed for the purpose of dissolving the medium 12.

Figure 7 shows a twisted position of the line section 71 such that the nozzle 20 is directed away from the grid 23 and directs its spray jet directly onto the Figure 7 only indicated collecting device 26. In this second operating mode, corresponding to a second switching state of the switching device 57, the spray nozzle 20 supplies pure water, i.e. water without dissolved medium 12, to the collecting device 26.

This water, free of medium, can now be used by the dosing device 10 for rinsing purposes - or possibly also for other purposes, e.g. for calibration purposes.

In one embodiment of the invention, the drive 61 can displace the spray nozzle 20 and the line section 71, for example, in the sense of a forward rotation and a reverse rotation, i.e. in different directions of rotation.

Alternatively, the invention also encompasses the drive 61 only activating the line section 71 to be rotated in one direction of rotation and, for example, the line section 71 is rotated by 180 degrees about the axis 72 in order to switch the spray nozzle 20 from the first operating mode to the second operating mode, and the line section 71 is rotated by a further 180 degrees about the axis 72 in order to switch the spray nozzle 20 from the second operating mode to the first operating mode.

In the embodiment of the Figures 5 to 7 As will be understood by the person skilled in the art, two valves 16a and 16b are not required, but the arrangement of a single valve 16 is sufficient. This is in the embodiments of the Figures 5 to 7 connected to the controller 15 via a signal line 44.

Another example is shown in the Figures 8 to 10 shown: Here the Figures 9 and 10 the two operating modes of the spray nozzle 20.

According to Figure 9 the spray nozzle 20 is in the first operating mode and can act on the grid 23 by releasing water 50 while providing a corresponding spray jet, dissolve medium 12 and feed this as media solution 24a, 24b, 24c to the collecting device 26.

The dosing device 10 of the embodiment of the Figures 8 to 10 additionally comprises a drive 69 with which a shielding element 66 can be displaced.

The shielding element 66, e.g. in the form of a plate-shaped body, is in the Figures 8 and 9 in the first position, the so-called non-use position, and in Figure 10 in the second position, the usage position.

When the shielding element 66 is in the non-use position, the spraying of the grid 23 by the spray nozzle 20 is not impaired.

If the shielding element 66 is moved to the use position 68 according to Figure 10 proceed, it blocks the path for the water 50 from the spray nozzle 20 to the grid 23 and prevents the water 50 from reaching the grid 23. Instead, the water 50 hits the underside 70 of the shielding element 66 and drips from there, illustrated by water drops 25a, 25b, 25c. In this embodiment too, when the spray nozzle 20 is in the second operating mode, pure water 50 that is not mixed with medium 12 is supplied to the collecting device 26.

In the embodiment of the Figures 8 to 10 The following applies: The switching device 57 in turn comprises a valve 16 and a drive 69, whereby the two elements can be addressed via signal lines 44a and 44a4. If the switching device 57 is switched by the control 15 in a first switching state, the valve 16 is opened and the drive 69 is activated in such a way that the shielding element 66 is in a non-use position according to Figure 9 is located.

When the control 15 receives a command to carry out a rinsing operation, whereby this command can originate, for example, from the target device 13, or from a control unit 34 of a pump 35, or can possibly be generated by the control 15 of the dosing device 10 itself, the control 15 addresses the drive 69 in order to move the shielding element 66 into its position of use according to Figure 10 The switching device 57 is then in its second switching state.

The drive 69 can, for example, comprise a gear (not shown) that cooperates with a rack (not shown) on the shielding element 66. Of course, the invention also encompasses other mechanical connections and couplings between the drive 69 and the shielding element 66.

Another embodiment is now described using the Figures 11 to 13 shown.

In this embodiment, a controllable valve 63 is provided as part of the switching device 57 in or on the water line 17b, upstream of the spray nozzle 20. This can assume a first use position and a second use position. In the first use position, the valve 63 is completely open and does not, or almost does not, prevent the water from flowing through the line section 17b.

The nozzle 20 is in its first operating mode and can spray the grid 23.

Figure 13 shows the controllable valve 63 in its second operating position. Here it is indicated - only schematically - that the valve 63 extends into the liquid flow within the line section 17b. In this second operating position 65, the controllable valve 63 ensures that the line cross-section within the water line 17b is reduced, or at least that there is an obstacle to the flow. By moving the controllable valve 63 to this position, the spray nozzle 20 can be put into its second operating mode, the spray mode.

The operating position of the valve 63 according to Figure 13 corresponds to the second switching state of the switching device 57, and the operating position of the valve 63 according to Figure 12 corresponds to the first switching state of the switching device 57.

There are different possibilities for constructing such a controllable valve 63. For example, a hose cross-section can be reduced in the manner of a camera aperture.

In a further embodiment of the invention, the controllable valve 63 can also be designed such that it additionally provides a completely closed or firmly shut-off state of the line section 17b.

In a further embodiment of the invention, not shown in the drawings, the line 17b is formed by a flexible hose line. Such a hose can be squeezed on the outside, e.g. by a cam.

In this case, the cam provides the controllable valve 63. The cam can hold the hose in a non-use position completely squeeze the hose, partially squeeze the hose in a first use position, or completely release the hose in a second use position to provide the different operating modes of the spray nozzle or to completely block the flow of water from the spray nozzle.

The numerous embodiments of the metering device 10 according to the invention enable the spray nozzle 20 to be operated in at least two different operating modes. In the first operating mode, the spray nozzle 20 can perform its conventional rinsing function and apply water 50 to the grid 23, dissolve medium 12 and supply a media solution 24 to the collecting device 26.

In the second operating mode, the spray nozzle 20 can dispense water 50, but the water is dispensed in such a way that no spray cone can build up, or a spray cone that does build up does not reach the grid 23.

The dosing device 10 can thus initiate a self-cleaning process. Such a self-cleaning process can be carried out occasionally or regularly and in particular automatically.

In the embodiments of the invention, which are shown for example in Figure 2 shown, have a pump 35, the dosing device 10 according to the invention can occasionally or regularly flush the line between the dosing device 10 and the pump 35 as well as the line between the pump 35 and the target device 14.

Powder or solid residues that adhere to pipe sections can be removed in this way. This prevents particles from settling, which could otherwise clog the fluid lines.

In the second operating mode, the dosing device 10 according to the invention also enables the spray nozzle 20 itself to be rinsed. The spray nozzle 20 can be rinsed as often as desired.

In the examples of the Figures 1 to 4 Two valves 16a and 16b are provided. The invention also encompasses the use of a double solenoid valve instead of two valves 16a and 16b; in the latter case, it is also not necessary for the water line 17 to be divided into two line branches 60a, 60b. Instead, for example, the individual valves of a double valve can be connected in parallel.

The examples of the Figures 5 to 8 show that the nozzle 20 can be rotated about a rotation axis. The invention also includes when the spray nozzle 20 is designed in the manner of a hand-held shower head and enables rotation of an element about an axis that corresponds approximately to the main direction of water jet when the spray nozzle 20 is operated in the first operating mode. Here, by rotating elements of the spray nozzle 20, possibly even only by small rotational angles, changed jet paths of the emitted water 50 can be achieved. The two different operating modes of the spray nozzle 20 can be made possible in this embodiment of the invention by different rotational positions of elements of the spray nozzle 20.

The method according to the invention enables nozzle flushing. This was not possible in the prior art.

The method according to the invention also enables flushing of pipe paths.

According to the invention, nozzle flushing and line flushing can be carried out automatically. Automated flushing can be carried out regularly, for example at predetermined times or after each dosing or after a certain number of dosings has been reached.

Claims (15)

Dosing device (10) for dosing powdered or solid media (12), such as cleaning agents or disinfectants, and for supplying them in dissolved form (24) to a washing or cleaning system (14), e.g. to a commercial dishwasher, comprising a carrier (21), in particular a cartridge carrier, to which a container (11), in particular a cartridge, with powdered or solid medium (12) can be attached, wherein the carrier (21) or the container (11) comprises a grid (23) which prevents the medium (12) from escaping from the container (11), and comprising a spray nozzle (20) with which, controlled by a control (15) of the dosing device (11), water (50) can be dispensed to dissolve the medium (12), wherein the medium (24) dissolved in water (50) and passing through the grid (23) of the washing or cleaning system (14) Cleaning system (14) can be fed via a feed device (20, 27, 28, 35), characterized in that the dosing device (10) comprises a switching device (57) which can be addressed by the controller (15) and which has at least two different switching states for operating the spray nozzle (20) in different operating modes. Dosing device (10) according to claim 1, characterized in that a first operating mode of the spray nozzle (20) comprises a spray operation of the spray nozzle (20) in order to apply water (50) to the grid (23). Dosing device (10) according to claim 2, characterized in that a second operating mode of the spray nozzle (20) comprises a rinsing operation of the spray nozzle (20) in order to supply water (50) to a collecting device (26) without acting on the grid (23). Dosing device (10) according to one of claims 1 to 3, characterized in that the switching device supplies the spray nozzle (20) in its first switching state with a first, higher volume flow of water (50) and in its second switching state with a second, lower volume flow of water (50) compared to the first volume flow. Dosing device (10) according to one of the preceding claims, characterized in that the dosing device (10) is arranged externally of the washing or cleaning system (14). Dosing device (10) according to one of the preceding claims, characterized in that the control (15) of the dosing device (10) is designed to communicate with the washing and cleaning system (14). Dosing device (10) according to one of the preceding claims, characterized in that the switching device (57) comprises two valves (16a, 16b) which can be addressed by the control (15). Dosing device (10) according to claim 7, characterized in that different line branches (60a, 60b) of a supply line (17b) leading to the spray nozzle (20) can be opened or closed with the two valves (16a, 16b). Dosing device (10) according to one of claims 1 to 6, characterized in that the switching device (57) comprises a valve (16a, 16b) which can be addressed by the control (15) and which can assume at least two different positions (Fig. 12, Fig. 13) and which, in the different positions, supplies the spray nozzle (20) with different volume flows of water (50). Dosing device (10) according to one of claims 1 to 6, characterized in that the switching device (57) comprises a displaceable shielding element (66) which, in a first position (64), clears a path between the spray nozzle (20) and the grid (23) for the water (50) and which, in a second position (65), blocks this path. Dosing device (10) according to one of claims 1 to 6, characterized in that the switching device (57) comprises a drive (61) with which the spray nozzle (20) is movable, in particular rotatable, between a first position and a second position. Dosing device (10) according to claim 11, characterized in that the spray nozzle (20) in its first position supplies the grid (23) with water (50) and in its second position supplies water (50) to a collecting device (26) without supplying the grid (23) with water (50). Dosing device (10) according to one of claims 1 to 12, characterized in that the dosing device (10) has a collecting device (26) arranged below the grid (23), e.g. a funnel (28), for collecting the medium (24) dissolved in water (50). Dosing device (10) according to one of the preceding claims, characterized in that the feed device comprises a pump (35), in particular a hose pump, which can be addressed in particular by the control (15) of the dosing device (10). Method for operating a dosing device (10) for dosing powdery or solid media (12), such as cleaning agents or disinfectants, and for feeding them into dissolved form (24) to a target device (14) in the form of a washing or cleaning system, e.g. to a commercial dishwasher, in particular a method for operating a dosing device (10) according to one of the preceding claims, characterized by the steps: a) providing a carrier (21) for a container (11) with a powdery or solid medium (12) to be dosed, b) Carrying out a dosing process comprising i) activating a switching device (57) by a control (15) of the metering device (10), ii) switching the spray nozzle (20) to a first operating mode, iii) spraying the medium (12) with water (50) through a grid (23), iv) collecting the media solution (24), v) supplying the media solution (24) to a target device (14), c) carrying out a rinsing process comprising vi) Activation of the switching device (57) by the control (15) of the dosing device (10), vii) switching the spray nozzle (20) to a second operating mode for flushing the pipe paths, viii)Dispensing water (50) through the spray nozzle without spraying the grid (23) and the medium (12).

Images