CN112752886B

CN112752886B - Shower with additive dispenser

Info

Publication number: CN112752886B
Application number: CN201980062632.1A
Authority: CN
Inventors: E·莫克; M·罗塞莱
Original assignee: Gjosa SA
Current assignee: Gjosa SA
Priority date: 2018-10-02
Filing date: 2019-10-01
Publication date: 2023-05-05
Anticipated expiration: 2039-10-01
Also published as: EP3861178A1; EP3861178B1; WO2020070154A1; CN112752886A

Abstract

A dispenser, in particular a shower, arranged for dispensing water with an additive, comprising: a shower head (14); -a shower hose (13) for supplying water to the shower header (14); -at least one additive supply source (21); -at least one additive line (16) for supplying additive from the at least one additive supply source (21) to the showerhead (14); and wherein the spray hose (13) and the at least one additive line (16) are flexible and optionally bonded to each other. Furthermore, the dispenser comprises at least one additive pump (9) for delivering the additive from the at least one additive supply source (21) to the at least one additive line (16); and the at least one additive pump (9) is arranged and controlled to control delivery of the additive to the showerhead (14).

Description

Shower with additive dispenser

Technical Field

The present invention relates to the field of sanitary equipment. It relates to a dispenser and a corresponding method arranged for dispensing water with additives as described in the preamble of the respective independent claims.

Background

US8'490'891 discloses a shower head and a washing fluid supply device, wherein a delivery pipe for the washing fluid is arranged in a water pipe leading from the supply device to the shower head. The supply device includes a piston that generates pressure to deliver the washing fluid to the showerhead via its tube. The piston is activated by the pressure of tap water. In the shower head, a pair of manually operated valves allow switching between the delivery of water or a foam mixture of water, washing fluid and air. This mixture is created in the showerhead and exits the showerhead at another outlet than water. It is not possible to control the volume of washing fluid dispensed or its concentration within the mixture. The valve system in the showerhead is mechanically complex and must be operated manually.

US2007/235091 shows a tap for a kitchen sink having two ports for connection to cold and hot water supply lines and a third port for connection to a special water supply line, for example for supplying filtered or soda water. Using two concentric hoses, the control valve selects to supply mixed or special water to the drain head.

WO2007/004050 shows separate delivery of treated water and tap water, comprising a flexible hose for separately delivering treated water and tap water to establish a connection between a nozzle provided at two separate delivery points and a dispensing unit for separately supplying treated water and tap water.

EP0313913A2 discloses a mixing device in a shower head remotely controlled by a button on the shower head having a base unit with a pump. The additive line may extend parallel to the water line leading to the showerhead such that the additive is dispensed in front of the showerhead through the valve.

WO2018/122223A1 and WO2018/122206A1 disclose apparatus and methods for dispensing a mixture of water and additives via a showerhead and parameters related to the user of the apparatus.

US2013/0291947A1 discloses a faucet having an additive line leading to a mixer at the faucet outlet parallel to the water pipe.

Disclosure of Invention

It is therefore a possible object of the present invention to create a dispenser arranged for dispensing water with additives of the initially mentioned type, which overcomes the aforementioned drawbacks.

Another possible object of the invention is to create a dispenser that allows to precisely control at least one of the delivery time, volume or concentration of the additive being delivered.

These objects are achieved by a dispenser according to the claims.

A dispenser, which may be a shower in particular, is arranged for dispensing water with an additive. It comprises the following steps:

a shower head;

a shower hose for supplying water to the shower header;

at least one additive supply source;

at least one additive line for supplying additive from the at least one additive supply source to the showerhead;

wherein the spray hose and the at least one additive line are flexible and optionally bonded to each other;

wherein the method comprises the steps of

The dispenser comprises at least one additive pump for delivering the additive from the at least one additive supply source to the at least one additive line;

an additive pump is arranged and controlled to control delivery of the additive to the showerhead.

In other words, the delivery of the additive to the showerhead and thus the delivery of the water flow into the showerhead is not controlled by valves or the like in the showerhead itself at the end of the additive line rather than at the beginning of the additive line. This allows for control of the mixing of the additives in the showerhead itself with the water in a precise manner, but without increasing the structural complexity of the showerhead.

In an embodiment, the additive pump is arranged to increase the additive pressure in the additive line to be higher than the water pressure in the water supply line when connected to the mains water supply. The additive is typically a liquid. Additional liquids other than water may be used.

In an embodiment, the additive outlet arranged at the end of the additive pipe is arranged in the shower head.

This allows a mixing device for mixing the additive and the water to be arranged in the shower head downstream of the additive outlet. The mixing device or mixing unit may be a static mixer comprising elements that create turbulence in the mixed flow of water and additives. This may be done by shaping the piping for mixing the streams and/or by incorporating elements for creating turbulence in the streams into the piping.

In an embodiment, the showerhead downstream of the additive outlet comprises a conduit for maintaining an at least approximately laminar flow of the mixed flow until the mixed flow reaches the region of the outlet of the showerhead. In particular, the conduit may have uninterrupted walls, such as edges, ledges or protrusions protruding into the conduit.

This may help reduce energy losses in the mixed flow and thus increase the effectiveness of the shower in generating a spray.

In an embodiment, the additive line at the additive outlet opens into a space within the showerhead for directing water to an outlet of the showerhead.

In other words, the end of the additive line is free of valves. When the pressure in the additive line is lower than the water pressure in the showerhead, the additive will be pushed back or retained in the additive line.

In an embodiment, the additive outlet is arranged to reduce or eliminate venturi effect introducing the additive into the water stream.

In an embodiment, the additive outlet comprises a check valve. This may prevent water from flowing back into the additive line.

In an embodiment, the check valve is designed to open only if the pressure difference across the check valve exceeds a threshold value.

This prevents the additive from flowing into the water stream when the additive pump is not running. The threshold value for opening the check valve may be, for example, 0.1 bar or 0.5 bar or 1 bar.

In an embodiment, the check valve is a diaphragm valve, such as a duckbill valve or an English valve.

In an embodiment, the additive pump is a volumetric pump, in particular a peristaltic pump or a diaphragm pump.

This allows controlling the amount of additive, in particular the volume of additive, being delivered by controlling the movement of the additive pump. It is not necessary to measure the flow of additive. The additive can be dosed precisely.

In an embodiment, the at least one additive line and the spray hose extend parallel to each other.

In an embodiment, the at least one additive line and the spray hose are attached to each other.

In embodiments, the at least one additive line and spray hose have a length of at least 80 centimeters or at least 1 meter.

In an embodiment, the at least one additive line is arranged in the spray hose, and in particular

The inner diameter of the shower hose is between 8 mm and 12 mm, in particular at least about 10 mm,

exactly one additive line is present in the spray hose, and the external diameter of the additive line is 3 to 6 mm, in particular at least about 4 mm.

In an embodiment, the inner cross section of the spray hose comprising one or more additive pipes still used for guiding the water has an area of less than 60 square millimeters or less than 50 square millimeters or less than 40 square millimeters or less than 30 square millimeters.

In an embodiment, the water pump is designed to deliver water flow through the showerhead at a rate of less than 5 liters/minute or less than 4 liters/minute or less than 3 liters/minute or less than 2 liters/minute.

Such a low flow rate is advantageous in combination with the fact that the internal area of the spray hose is reduced by the presence of the additive line: by arranging one or more additive lines within the spray hose, the remaining cross-section of the spray hose through which water can be delivered to the spray header is reduced. However, this has proven to be advantageous in connection with low flow distributors. Low flow dispensers, such as showers, require a smaller inside diameter of the spray hose in order to reduce the delay caused by the time it takes for water to travel along the spray hose. The delay should be small because when the user adjusts the water temperature, a change should be perceived at the showerhead as soon as possible. In summary, although the inner cross section has been reduced due to the additive piping, spray hoses having an outer diameter similar to that of conventional spray hoses may be used. For the end user, the overall treatment of the shower hose is the same as that of a conventional shower hose, which is advantageous.

In embodiments, the additive line has an inner diameter of between 1 mm and 3 mm or 4 mm, in particular at least about 2 mm.

In an embodiment, the dispenser comprises two or more additive lines, each having an associated additive supply source and optionally an associated additive pump.

This allows a variety of additives specific to the dispenser application to be dispensed and mixed with water in a controlled manner.

For example, in dispensers designed for hair care, the individual additives may be different types of shampoos, conditioners, colorants, and the like.

In embodiments, the dispenser may include a selective activation device for activating the dispensing of one or more additives. The selective activation means may comprise a plurality of activation switches or buttons, each associated with a particular additive. The selective activation means may comprise a selection element for selecting an additive from two or more additives and an activation switch or button for activating the dispensing of the selected additive.

Each of the one or more additives may be associated with an additive control input. This may be an input device or an input element allowing to adjust the amount of additive. The quantity may be expressed for example as,

the volume or weight of additive to be dispensed in a single "injected" additive;

volume or weight of additive to be dispensed per time unit of continuous delivery of the mixture of additive and water;

the concentration of additives to be distributed in a single "shot" or continuously distributed in the water. The concentration may be expressed in terms of the relative weight or relative volume of the additive to the water.

For example, a concentration of 0.5 g to 1 g of additive in 10 g of water may be used.

The additive pump may be controlled to deliver a corresponding amount or volume of additive, given the desired additive concentration and the delivery rate or flow rate of the water pump.

Or vice versa, if a given amount or desired concentration of additive, a diluted "injection" additive in the water is specified, and the water pump can then be controlled to deliver a corresponding amount of water during a "mixture delivery time".

For one or more additives, a set of dispensing parameters may include parameters specifying the amount of additive and optionally the duration of dispensing the additive. The duration may be specified relative to a reference point in time. Thus, for one or more additives, the set of allocation parameters may specify a trajectory of the time-varying amounts that is initiated, for example, by triggering an activation button.

Such a trajectory may simply specify the dispensing of two or more additives simultaneously, each having a particular concentration. Or the trajectory may specify the injection of a first additive (or combination of additives) that is dispensed first, the injection of a second additive (or a different combination of additives) that is dispensed after a certain time, etc.

In an embodiment, the dispensing may be terminated by user input, e.g. by the same or another activation button, and/or by turning off the water supply to the dispenser.

In an embodiment, a dispenser is configured to store at least one set of dispensing parameters specifying the dispensing of one or more additives and to determine a set of dispensing parameters to be used in the operation of the dispenser by:

selecting one of a plurality of sets of said allocation parameters, and/or

Modifying a stored set of allocation parameters, and/or

Receiving a set of stored allocation parameters from another device

And based on at least the following information:

information identifying an operator of the dispenser;

information identifying the person or object to be treated by the dispenser;

information specifying one or more additives or characteristics of one or more additives.

In this way, the operation of the dispenser may be adapted to the user's preferences and/or current tasks. In the context of hair care, in particular professional hair care, the person to be treated is a customer of the hairdresser, and the stored dispensing parameters are relevant to the customer. They may reflect customer preferences and/or characteristics of the hair appropriate for the customer.

Furthermore, it is possible to adapt the operation of the dispenser to the physical and chemical characteristics of one or more additives. Such characteristics may be solubility, viscosity, concentration of the agent contained in the additive, etc.

In an embodiment, the water pump is designed to generate a pressure in the spray hose of at least 4 bar, at least 5 bar, at least 6 bar, at least 7 bar or at least 8 bar.

Such relatively high pressures allow for atomizing the water and/or the mixture of water and additives to produce a fine mist. Although this is a fine mist with small droplets, the droplets have a high kinetic energy. This makes them effective in cleaning and rinsing. This occurs when the fluid flow rate is relatively low.

In particular, a combination of low flow rates with spraying or atomizing at relatively high pressures is advantageous for hair care applications and in combination with dispensing of additives as described herein. This combination allows for a rapid switching between dispensing and flushing of the mixture of water and one or more additives. As previously mentioned, the flushing may be at a low flow rate due to the effect caused by the high pressure. A low flow rate is advantageous in view of the reduced diameter of the spray hose due to the reduced additive piping within the hose.

In an embodiment, the spray header is arranged to dispense water and a mixture of water and additives through the same outlet of the spray header, in particular through the outlet that generates the droplet spray.

In an embodiment, the showerhead is configured to dispense a liquid such as water or a water-based mixture by generating impinging liquid jets.

Corresponding outlets using impinging jets are disclosed for example in US8458826 or WO2011/054120A, which are hereby incorporated by reference. They typically have one or two or three nozzle groups, each nozzle group having two or more nozzles for generating impinging liquid jets. Upon collision, the liquid atomizes, producing a fine mist with droplets. Spraying at increased pressure increases the kinetic energy of the droplets.

In an embodiment, the water pump is arranged downstream of the water valve.

In an embodiment, there is no water valve. The water pump may then also have the function of a water valve.

In an embodiment, the water pump and the additive pump and optionally at least one of the water valve, the pressure activated switch, the microcontroller are arranged together in a single housing in the base unit.

A method for operating a dispenser for dispensing water with an additive, comprising the following steps for dispensing a portion of the additive (in the form of a mixture of additive and water):

starting with the operation in which water is delivered to and sprayed through the showerhead;

reducing or stopping the delivery of water to the showerhead;

o for example by partially or completely closing the water valve and/or reducing the delivery rate of the water pump or stopping the water pump;

delivering additive through an additive line to the showerhead while reducing or stopping delivery of water;

restart the delivery of water to the showerhead or increase the delivery rate to the same rate as before the reduction or stopping or a different rate.

In an embodiment, said delivery of said additive is accomplished by delivering a predetermined amount, in particular a portion, of the additive. This may be done as a single "injection" of the additive.

In an embodiment, said delivering of said additives is accomplished by delivering a preset amount of at least one additive per unit time. This corresponds to a continuous flow of the mixture of water and additives and a preset concentration of at least one additive.

In an embodiment, the method comprises the steps of

Restarting the delivery of water only for a short time called "mixture delivery time" and stopping the delivery of water to the showerhead after the "mixture delivery time".

As already mentioned above, these amounts and durations (or corresponding frequencies) as dispensing parameters may be adjusted according to the user, task and/or additive.

In an embodiment, the method comprises the steps of:

during a "mixture delivery time", the water pump is operated to deliver an amount of water corresponding to the volume of a portion of the additive delivered by the additive pump, resulting in a controlled concentration of the additive in the water during delivery of the mixture.

For example, given 0.5 g to 1 g of additive (e.g., corresponding to 0.5 ml to 1 ml) delivered by an additive pump, they are dissolved in 16 g of water, which is achieved by delivering 2 liters per minute in half a second by operating the water pump.

According to another aspect and corresponding other embodiments, the mixing of the additive and water occurs before the shower hose. The additive line thus supplies the additive to the mixing unit before being connected to the spray hose. Other elements described herein may be used in conjunction with this aspect as long as they are compatible.

The description of the invention refers primarily to water as the base liquid being dispensed alone or in combination with one or more additives, it being understood that the invention may be practiced with other liquids instead of water.

Other embodiments are evident from the dependent claims. Features of the method claims may be combined with features of the apparatus claims and vice versa.

Drawings

The subject matter of the invention will be described in detail hereinafter with reference to embodiments shown in the drawings, which schematically show:

FIG. 1 is a dispenser for an additive;

FIG. 2 is a dispenser for an additive with an additive line within the spray hose; and

fig. 3 is a dispenser for several additives.

The reference numerals used in the figures and their meanings are listed in summary form in the list of reference numerals. In principle, like parts have like reference numerals in the figures.

Detailed Description

Fig. 1 schematically shows a dispenser comprising a base unit 4, a spray hose 13 and a spray header 14. The base unit 4 is supplied with water via a water supply fitting 1 (e.g. a tap or valve which may be manually operated), an optional pressure reducing valve 2 and a water supply line 3. In an embodiment, no valve is present in the water supply fitting 1 or at the water supply fitting 1. The water valve 15 must then be designed to handle the tap water pressure. The base unit 4 supplies water to the shower header 14 through the shower hose 13. The base unit 4 comprises a water valve 15, the water valve 15 being supplied by the water supply line 3 and being arranged to be controlled by control signals, for example from a microcontroller 18. The pressure activated switch 5 is arranged to provide a signal dependent on the water pressure after the water valve 15. Water from the water valve 15 passes through the pump water fitting 6 to the water pump 12. The water pump 12 delivers water to the spray hose 13 and thence to the spray header 14. The base unit 4 comprises an additive supply source 21 and an additive pump 9 which supplies additive to the additive line 16 and from there to the shower head 14. The additive supply source 21 may be disposed inside the base unit 4 or may be attached to the outside of the base unit 4. Existing one-way or refillable containers may be used. The additive line 16 ends in an additive outlet 20, where the additive is added to the water flow delivered by the shower hose 13. Optionally, a check valve 11 is arranged at the end of the additive line 16.

The microcontroller 18 is arranged to control the water valve 15, the water pump 12 and the additive pump 9. The microcontroller receives input signals from the aforementioned pressure activated switch 5 and optional user input devices such as an activation push button or switch 17 and/or an additive amount or concentration controller 19. The microcontroller 18 may be arranged to start delivering the mixture of water and additive when the activation switch 17 is activated. The microcontroller 18 may be arranged to control the amount of additive to be delivered, or the concentration of additive in the water, in dependence of the input signal of the additive amount or concentration controller 19.

In other embodiments, the water valve 15 is operated directly by the pressure activated switch 5.

The activation push button or switch 17 may be disposed on the base unit 4 or may be disposed on a remote unit remote from the base unit 4. For example, the activation push button or switch 17 may be disposed in the foot pedal or in the showerhead 14. The switching signal from the activation switch 17 may be transferred to the microcontroller 18 via a wireless or wired link.

Likewise, the additive concentration controller 19 may be part of the base unit 4 or may be disposed on a remote unit remote from the base unit 4. Information from the additive concentration controller 19 may be transmitted to the microcontroller 18 via a wireless or wired link.

The activation button 17 and/or the additive concentration controller 19 may be implemented in a dedicated device or by software on a general purpose device such as a smart phone or other portable communication device.

Fig. 2 shows the same elements as fig. 1, but with an additive line 16 extending through the shower hose 13.

Fig. 3 shows the same elements as fig. 1, but with a plurality of additive supplies 21, additive pumps 9 and additive pipes 16. Furthermore, the additive concentration controller 19 includes a corresponding plurality of controller inputs, one for each additive.

In other embodiments, starting from the configuration of fig. 2 or 3, the order of the water valve 15 and the pressure activated switch 5 is reversed. The signal from the pressure activated switch 5 is thus dependent on the water pressure in the water supply line 3 before the water valve 15.

The following applies to all the constructions of fig. 1 to 3. Details of the single set of additive supply source 21, additive pump 9, additive line 16, additive concentration controller 19, etc., and their operation are applicable to each such set if more than one is present.

The additive pump 9 is a pump that allows control of the amount of additive that is delivered. For example it is a volumetric pump. The volumetric pump may be rotary, reciprocating or linear. In other embodiments, the additive pump 9 is a non-volumetric pump, such as a diaphragm pump, in combination with a sensor for measuring the flow rate generated by the pump.

While the invention has been described in terms of the present embodiments, it is to be clearly understood that the invention is not limited thereto but may be otherwise embodied and practiced within the scope of the appended claims.

Claims

1. A dispenser arranged for dispensing a base liquid with an additive, comprising:

a shower head (14);

a spray hose (13) for supplying a base liquid to the spray header (14);

at least one additive supply source (21);

at least one additive line (16) for supplying additive from the at least one additive supply source (21) to the showerhead (14);

wherein the spray hose (13) and the at least one additive line (16) are flexible and are bonded to each other;

wherein,,

the dispenser comprises at least one additive pump (9) for delivering the additive from the at least one additive supply source (21) to the at least one additive line (16);

-said at least one additive pump (9) is arranged and controlled in such a way as to control the delivery of said additive to said spray header (14);

wherein an additive outlet (20) arranged at the end of the additive pipe (16) is arranged in the spray header (14) for mixing additive and base liquid in the spray header (14);

wherein the additive line (16) opens at the additive outlet (20) into a space within the showerhead (14) for guiding a base liquid to an outlet of the showerhead (14); and is also provided with

Wherein the spray header (14) is configured to dispense liquid by generating impinging liquid jets.

2. Dispenser according to claim 1, wherein the additive outlet (20) comprises a check valve (11).

3. Dispenser according to claim 2, wherein the check valve (11) is designed to open only if the pressure difference before and after the check valve (11) exceeds a threshold value.

4. A dispenser according to one of claims 1 to 3, wherein the additive pump (9) is a volumetric pump.

5. A dispenser according to one of claims 1 to 3, wherein the at least one additive line (16) is arranged within the spray hose (13) and

the inner diameter of the spraying hose (13) is between 8 mm and 12 mm,

an additive line (16) is located in the shower hose (13), and the external diameter of the additive line (16) is 3 to 6 mm.

6. Dispenser according to claim 5, wherein the inner cross section of the spray hose (13) comprising one or more additive pipes (16) still intended to guide the base liquid has an area of less than 60 square millimeters.

7. A dispenser according to one of claims 1 to 3, wherein the base liquid pump (12) is designed to deliver a base liquid flow through the spray header (14) at a rate of less than 5 litres/minute.

8. A dispenser according to one of claims 1 to 3, wherein the additive line (16) has an inner diameter of between 1 and 4 mm.

9. A dispenser according to one of claims 1 to 3, comprising more than two additive lines (16), each having an associated additive supply source (21) and an associated additive pump (9).

10. A dispenser according to one of claims 1 to 3, configured to store at least one set of dispensing parameters that explicitly prescribe the dispensing of one or more additives and to determine a set of dispensing parameters to be used in the operation of the dispenser by:

selecting one set and/or from a plurality of sets of said allocation parameters

Modifying a stored set of allocation parameters and/or

Receiving a stored set of allocation parameters from another device

And based on at least one of the following information:

information identifying an operator of the dispenser;

information identifying a person or object to be treated with the dispenser;

information specifying one or more additives or characteristics of one or more additives is explicitly specified.

11. A dispenser according to one of claims 1 to 3, wherein the base liquid pump (12) is designed to generate a pressure of at least 4 bar in the spray hose (13).

12. A dispenser according to one of claims 1 to 3, wherein the spray header (14) is arranged to dispense the base liquid and the mixture of base liquid and additive through the same outlet of the spray header (14).

13. The dispenser of claim 10, wherein the set of dispensing parameters includes parameters that explicitly define the amount of additive and the duration of additive dispensing for the one or more additives, whereby the set of dispensing parameters can explicitly define a trajectory of the amount over time for the one or more additives.

14. A spray header for use in a dispenser according to one of claims 1 to 13, arranged to be connected to a spray hose and at least one additive line, wherein an additive outlet arranged at the end of the additive line is arranged in the spray header for mixing additive and base liquid in the spray header; and is also provided with

Wherein the additive line (16) opens at the additive outlet (20) into a space within the showerhead (14) for guiding a base liquid to an outlet of the showerhead (14);

and wherein the spray header (14) is configured to dispense liquid by generating impinging liquid jets.

15. A method for operating a dispenser according to one of claims 1 to 13 for dispensing a base liquid with an additive, comprising the following steps for dispensing an additive:

starting with an operation in which a base liquid is delivered to the showerhead (14) and sprayed through the showerhead (14);

reducing or stopping the delivery of base liquid to the showerhead (14);

by partially or completely closing the base liquid valve (15) and/or reducing the delivery rate of the base liquid pump (12) or stopping the base liquid pump (12);

delivering additive through the additive line (16) and additive outlet (20) to a space within the showerhead (14) for directing base liquid to the outlet of the showerhead (14) for mixing with base liquid in the showerhead (14) while reducing or stopping delivery of base liquid and dispensing a base liquid based mixture by creating impinging liquid jets;

restarting delivery of the base liquid to the showerhead (14) or increasing the delivery rate to the same rate as the rate prior to the reduction or stopping or a different rate.

16. The method of claim 15, comprising the steps of:

the base liquid delivery is resumed only for a short period of time known as the "mixture delivery time" and the delivery of base liquid to the showerhead (14) is stopped after the "mixture delivery time".

17. The method of claim 16, comprising the steps of:

during the "mixture delivery time", the base liquid pump (12) is operated to deliver an amount of base liquid corresponding to the volume of a portion of the additive delivered by the additive pump (9), thereby obtaining a controlled concentration of the additive in the base liquid during delivery of the mixture.

18. The method of claim 15, wherein the delivering of the additive is accomplished by delivering a preset amount.

19. The method of claim 18, wherein the delivering of the additive is accomplished by repeatedly delivering a preset amount of the additive at subsequent time intervals.

20. A dispenser for use in a shower arranged to dispense a base liquid with an additive, comprising:

at least one additive supply source (21);

at least one additive line (16) for supplying additive from the at least one additive supply source (21) to a spray hose (13) for supplying a base liquid to a spray header (14);

it is characterized in that the method comprises the steps of,

the dispenser comprises at least one additive pump (9) for supplying additive from the at least one additive supply source (21) to the at least one additive line (16),

an additive pump (9) is arranged and controlled in such a way as to control the delivery of additive to the spray hose (13);

wherein an additive outlet (20) arranged at the end of the additive pipe (16) is arranged in the mixing unit for mixing additive and base liquid in the spray header; and wherein at the additive outlet (20) the additive line (16) opens into a space within the mixing unit for guiding a base liquid to an outlet of the mixing unit;

wherein the mixing unit comprises elements that generate turbulence in the mixed flow of base liquid and additive;

21. Dispenser according to claim 20, wherein the additive outlet (20) comprises a check valve (11).

22. Dispenser according to claim 21, wherein the check valve (11) is designed to open only if the pressure difference before and after the check valve (11) exceeds a threshold value.

23. Dispenser according to one of claims 20 to 22, wherein the additive pump (9) is a volumetric pump.

24. The dispenser of one of claims 20 to 22, wherein the base liquid pump (12) is designed to deliver a base liquid flow through the spray header (14) at a rate of less than 5 liters/minute.

25. Dispenser according to one of claims 20 to 22, wherein the additive line (16) has an inner diameter of between 1 and 4 mm.

26. Dispenser according to one of claims 20 to 22, comprising more than two additive lines (16), each having an associated additive supply source (21) and an associated additive pump (9).

27. Dispenser according to one of claims 20 to 22, configured to store at least one set of dispensing parameters specifying one or more additives and to determine a set of dispensing parameters to be used in the operation of the dispenser by:

selecting one set and/or from a plurality of sets of said allocation parameters

Modifying a stored set of allocation parameters and/or

Receiving a stored set of allocation parameters from another device

And based on at least one of the following information:

information identifying an operator of the dispenser;

information identifying a person or object to be treated with the dispenser;

28. The dispenser of claim 27, wherein the set of dispensing parameters includes parameters that explicitly define the amount of additive and the duration of additive dispensing for the one or more additives, whereby the set of dispensing parameters can explicitly define a trajectory of the amount over time for the one or more additives.

29. Dispenser according to one of claims 20 to 22, wherein the base liquid pump (12) is designed to generate a pressure of at least 4 bar.

30. Dispenser according to one of claims 20 to 22, wherein the mixing unit incorporates elements for generating turbulence into the flow of the conduit.

31. A method for operating a dispenser for dispensing a base liquid with an additive, preferably according to one of claims 20 to 30, comprising the following steps for dispensing an additive:

starting with the basic liquid being fed to the mixing unit and from the mixing unit to the spray hose (13) and the spray header (14) in an operational manner for spraying by means of said spray header (14);

reducing or stopping the delivery of base liquid to the mixing unit;

delivering an additive to a space within the mixing unit via the additive line (16) and additive outlet (20) for mixing with a base liquid in the mixing unit while reducing or stopping the delivery of the base liquid and dispensing a base liquid based mixture by generating impinging liquid jets;

restarting the delivery of the base liquid to the mixing unit or increasing the delivery rate to the same rate as the rate before the reduction or stopping or a different rate.

32. The method of claim 31, comprising the steps of:

the delivery of the base liquid is resumed only for a short time called "mixture delivery time" and stopped after said "mixture delivery time" to said mixing unit.

33. The method of claim 32, comprising the steps of:

34. The method of claim 31, wherein the delivering of the additive is accomplished by delivering a preset amount.

35. The method of claim 34, wherein the delivering of the additive is accomplished by repeatedly delivering a preset amount of the additive at subsequent time intervals.