WO2019174797A1

WO2019174797A1 - Agricultural spraying device

Info

Publication number: WO2019174797A1
Application number: PCT/EP2019/051172
Authority: WO
Inventors: Oliver Meil; Olaf Ohlhafer; Steffen SIES; Hans-Arndt Freudigmann; Dieter Amesoeder
Original assignee: Robert Bosch Gmbh
Priority date: 2018-03-13
Filing date: 2019-01-17
Publication date: 2019-09-19
Also published as: DE102018203791A1

Abstract

The invention relates to an agricultural spraying device (11) for dispensing a treatment liquid (26) to be dispensed, onto an agricultural area, by means of a dispensing unit (24), comprising: a carrier liquid valve (50), which can be connected to a carrier liquid tank (30) by means of a carrier liquid supply line (70) and is designed to meter a carrier liquid from the carrier liquid tank (30) into a liquid line (60) connected to the dispensing unit (24); a first metering valve (52), which can be connected to a first treatment liquid tank (40) by means of a first supply line (80) and is arranged in the liquid line (60) and is designed to meter a first treatment liquid from the first treatment liquid tank (40) into the liquid line (60); and a second metering valve (54), which can be connected to a second treatment liquid tank (42) by means of a second supply line (82) and is arranged in the liquid line (60) and is designed to meter a second treatment liquid from the second treatment liquid tank (42) into the liquid line (60).

Description

description

title

Agricultural sprayer

State of the art

The invention relates to an agricultural spraying device for delivering a treatment liquid to be delivered to an agricultural surface by means of a dispensing unit, with a carrier liquid valve, a first

Dosing valve and a second metering valve. Furthermore, the invention relates to a method for dispensing a treatment liquid to be dispensed onto an agricultural surface by means of an agricultural spraying device. The present invention also provides a control device and a computer program as well as an agricultural spray system with the spray device and the control device.

WO 2014/0896 A1 discloses a system for producing and dispensing a mixed liquid. Here, a plurality of valves is provided to prevent unwanted backflow of liquids in the system.

Disclosure of the invention

The present invention is an agricultural

Spraying device for dispensing a treatment liquid to be dispensed onto an agricultural surface by means of a dispensing unit according to independent claim 1.

The subject of the present invention is also a method for dispensing a treatment liquid to be dispensed onto an agricultural surface according to independent claim 6 and a control device according to claim 10. The subject matter of the present invention is furthermore a computer program which is set up to carry out all the steps of a previously described method as well as a machine-readable storage medium with a computer program stored thereon.

The present invention is finally an agricultural spray system according to claim 11 with the agricultural

Spraying device and the control device.

In particular, the spray device may be part of an agricultural

Spray system such as an agricultural sprayer or a crop protection device or be designed as an agricultural sprayer or a crop protection device. The spraying device can be arranged and / or arranged on or on a mobile unit.

The mobile unit may be designed as a land vehicle and / or aircraft and / or trailers. The mobile unit may in particular be an agricultural working machine, for example a tractor

Tractor, a tractor or a (self-propelled or autonomous) sprayer, be. The spray device may also be mounted on a hydraulic device of the agricultural machine. It is also conceivable that the spraying device is constructed on a loading surface of the agricultural machine. Alternatively, the

Sprayer be attached to the agricultural machine. The agricultural spray device is designed to treat an agricultural area with the treatment liquid, in particular with a spray mixture. Preferably, the spray device, comprising the valves and the dispensing unit, is arranged on a partial width of a spray boom of a field sprayer. Particularly preferred are at the partial width of the spray boom of the sprayer at least two, in particular a plurality, the

arranged agricultural spraying devices according to the invention. In this case, each agricultural spraying device preferably has a dispensing unit designed as a single spray nozzle.

An agricultural area may be an agricultural area, a crop area for plants or even a plot of such land Surface or acreage can be understood. The agricultural area can thus be a field, arable land, a grassland or a pasture.

The plants can, for example, crops whose fruit

used agriculturally (for example as food, animal feed or energy crop), as well as weeds or weeds and grass weeds. The plants can be part of the agricultural area.

The dispensing or applying the treatment liquid to the

Agricultural area or on a plant on the agricultural area may be part of a treatment of the agricultural area. It is also conceivable that the dispensing of the treatment liquid comprises treating the agricultural surface with the liquid for mechanical processing or damage, for example, of weeds on the agricultural surface.

Under a liquid can in the context of the present invention, a

Treatment liquid or a carrier liquid to be understood. In the context of the present invention, a treatment liquid can be understood as an agriculturally usable liquid. The treatment liquid is preferably a spray mixture. In the context of the present invention, a liquid can also be understood as meaning a suspension or an emulsion or a mixture of a suspension and an emulsion.

The treatment liquid has at least one active agent. The active agent may be a spray, that is a preparation or

Plant protection products, in particular a pesticide concentrate have. The active agent may accordingly comprise, for example, a herbicide, fungicide or an insecticide (pesticide). However, the active agent may also comprise a fertilizer, in particular a fertilizer concentrate. The active agent may accordingly have a liquid fertilizer and / or a growth regulator. The active agent can be formed as a liquid or as a solid, for example in the form of granules, or as a pre-dissolved solid, for example in the form of pre-dissolved granules. The treatment liquid preferably further comprises a carrier liquid for diluting the active agent. In the context of the present invention, a carrier liquid can be understood as meaning a liquid which is designed to be mixed with the active agent in order to bring it out

or dispensing the active agent, for example the

Pesticides or fertilizer to enable or improve. It is also conceivable that a present as a solid or granules active agent is suspended in the carrier liquid. It is also conceivable that a non-soluble in the carrier liquid active agent is emulsified in the carrier liquid. The carrier liquid is preferably water.

The treatment liquid is preferably formed as a plant protection agent diluted by means of a carrier liquid or fertilizer diluted by a carrier liquid. The treatment liquid is particularly preferably designed as a mixture of at least two plant protection agents diluted by means of a carrier liquid or two fertilizers diluted by means of a carrier liquid. Further preferably, the treatment liquid is diluted as a mixture of three by means of a carrier liquid

Pesticides or three fertilizers diluted by a carrier liquid formed.

The spraying device has a dispensing unit, in particular a

Spray nozzle unit, for dispensing or applying the treatment liquid. It is conceivable that the spray device at least one

Carrier liquid tank and at least two treatment liquid tanks comprises.

The carrier liquid can be separated from the carrier liquid tank by means of a

Carrier liquid supply line and a liquid line to the dispensing unit to be guided or passed. The treatment liquid can be guided or directed by the respective treatment liquid tank by means of a feed line and a liquid line to the dispensing unit. In the context of the present invention, a portion of the corresponding carrier fluid supply or supply line or a carrier fluid supply line or a supply line or a liquid line Liquid line to be understood. The carrier liquid supply line, the supply line and the liquid line may be formed as a fluidic connection line, for example in the form of a tube, tube, channel or a tube.

Furthermore, the spray device has a carrier fluid valve and two

Dosing valves on. The carrier liquid valve is by means of a

Carrier liquid supply with the carrier liquid tank connectable. The carrier fluid valve is preferably connected to the carrier fluid tank by means of the carrier fluid supply line. The carrier liquid valve is designed to dose the carrier liquid from the carrier liquid tank into the liquid line connected to the dispensing unit. That is, in other words, the carrier liquid valve is configured to control dosing of the carrier liquid from the carrier liquid tank into the liquid line. In the context of the present invention, metering of a liquid by means of a valve can be understood as meaning control of a volume flow of the liquid passing through the valve or passing through the valve. The metering thus comprises the targeted or defined feeding of the liquid to be metered to a line or unit arranged downstream of the valve. The dosing also includes interrupting a supply of the liquid to the downstream of the valve

arranged line or unit. The liquid metering valve is thus designed to interrupt a passage of the liquid. The

Carrier liquid valve can be arranged in the carrier liquid supply line and / or the liquid line or integrated into the carrier liquid supply line and / or the liquid line.

Preferably, each metering valve is assigned a treatment liquid tank. Furthermore, each metering valve is associated with a supply line. Each of the metering valves can be connected by means of the feed line assigned to the respective metering valve to the treatment liquid tank assigned to the respective metering valve. Each of the metering valves is preferably connected by means of the feed line assigned to the respective metering valve to the treatment liquid tank assigned to the respective metering valve. Each of the metering valves is formed, the treatment liquid from the respective metering valve associated treatment liquid tank in the connected to the dispensing unit Dosing liquid line. In other words, in each case, each of the metering valves is designed to control a metering of the treatment liquid from the treatment liquid tank assigned to the respective metering valve into the liquid line. The metering valves are arranged in the liquid line or integrated into the liquid line. That is, in other words, the metering valves are at least partially disposed in the fluid conduit. Preferably, the metering valves are arranged in the liquid line in such a way that they can be flowed through or flowed through or flushed through by the carrier liquid. In this case, the metering valves can be designed to control a passage of the carrier liquid in the liquid line. The influence of a metering valve through which the carrier liquid flows is preferably as low as possible on a passage of the carrier liquid through the metering valve.

The method according to the invention comprises a step of receiving a specification of a mixing combination of the treatment liquid to be dispensed by means of an agricultural spraying device associated

Control unit. The mixing combination of the treatment liquid to be dispensed can be a relative mixing combination of the treatment liquid-producing liquids. For example, the mixing combination may be "1 unit of the first treatment liquid and 0 unit of the second treatment liquid and 1 unit of the carrier liquid" or "1 unit of the first treatment liquid and 1 unit of the second treatment liquid and 0 unit of the carrier liquid". It is also conceivable that the mixing combination of the deliverable

Treatment liquid an absolute mixing combination of the

Treatment liquid-generating liquids. In this case, to the relative mixing combination, a volume flow or an amount of expenditure of the treatment liquid to be dispensed per unit area of the

agricultural area can be specified or predetermined. It is conceivable that the mixing combination can be entered by an operator of the injection device into the control device by means of an input unit, for example by means of an operator interface such as a touch-sensitive screen. It is also conceivable that the mixing combination by means of a wireless

Communication connection such as mobile or a

Nahfeldkommunikationsmethode can be specified. It is also conceivable that the Mixed combination is stored on a memory unit of the control device.

The method according to the invention also provides that at least one of the valves is controlled in a closed position in order to allow at least one liquid to flow out of the respective tank into the liquid line

interrupt. That is, in other words, that at least one of

Liquids for a defined discharge time or delivery time or injection duration does not contribute to the generation of the treatment liquid to be dispensed. It is conceivable that at the same time a treatment liquid and the carrier liquid or at the same time the first and the second treatment liquid are dispensed.

The control device according to the invention is designed to receive a specification of a mixing combination of the treatment liquid to be dispensed, for example by means of the user interface, a wireless communication or a readout from a memory unit. Furthermore, the control device is designed to control the valves and the dispensing unit. It is conceivable that the control device is designed, a control signal, in particular a

electrical, mechanical or pneumatic control signal to deliver control of a valve or the dispensing unit.

By the injection device according to the invention, the inventive

Spray system and the method according to the invention, it is now possible to produce by means of a small number of valves and thus particularly cost effective treatment liquid for delivery to an agricultural area. Due to the arrangement of the metering valves in the liquid line, the metering valves are particularly easy to flush with carrier liquid. Furthermore, by dosing the treatment liquids by means of arranged in the liquid line metering valves excellent mixing of

Liquids already accessible at the metering valves.

It is advantageous if

- The carrier liquid valve has a valve position, by means of which a passage of the carrier liquid from the carrier liquid tank in the liquid line and / or - At least one of the metering valves has a valve position, by means of which a passage of the respective treatment liquid from the respective treatment liquid tank is interruptible in the liquid line. Preferably, the valve position of the carrier liquid valve, by means of which the passage of the carrier liquid from the carrier liquid tank in the

Liquid line is interrupted, a closed position of the

Carrier fluid valve. Likewise preferred is the valve position of the

Dosing valve, by means of which the passage of the treatment liquid from the treatment liquid tank can be interrupted in the liquid line, a closed position of the metering valve. Here, the metering valve is preferably formed, the carrier liquid, regardless of the valve position of the

Pass metering valve through the metering valve. With this configuration, the agricultural spray device is designed to control a mixing combination of the treatment liquid to be dispensed and to which

agricultural area or plants to be treated on the agricultural area.

It is also advantageous if each of the metering valves has a valve position by means of which a volume flow of the respective metered into the liquid line treatment liquid for each metering valve is the same size. The valve position of the metering valves, by means of which the volume flow of the respective in the

Liquid line metered treatment liquid for each metering valve is the same size, is preferably a passage position of the metering valves. It is conceivable that the metering valves are equally constructed and controlled so that at the same pressure of the treatment liquids, the volume flow of the metered into the liquid line treatment liquids for each metering valve is the same size. In other words, if several metering valves have this passage position, the volume flow of the respective metered from the respective metering valve of the treatment liquid to be dispensed or supplied treatment liquid is the same size. For this purpose, the respective treatment liquid can be acted upon by a constant pressure source, for example by means of a constant pressure source. Thereby, the agricultural spray device is formed, a dosing or supplying a first

To interrupt liquid to be dispensed treatment liquid by means of a first metering valve and at the same time a dosing or supplying a second liquid to the dispensed treatment liquid by means of a Activate second metering valve, wherein the generated volume flow of the liquid to be dispensed remains constant.

Furthermore, it is advantageous if

- The carrier liquid valve and / or at least one of the metering valves as a steadily adjustable valve and / or

- The carrier fluid valve are designed as a 2/2-way valve and / or at least one of the metering valves as a 3/2-way valve.

The constantly adjustable can be a continuously adjustable or continuously controllable valve or a continuous valve. The continuously adjustable valve is designed to allow a steady transition of valve positions. For example, the continuously variable valve may be a proportional valve. The 2/2-way valve has two connections for fluid lines or supply lines and two valve positions. The 3/2-way valve has three connections for fluid lines or supply lines and two valve positions. The 3/2-way valve preferably has two connections for two fluidic supply lines and one connection for a fluidic line or discharge line. That is, in other words, preferably, the 3/2-way valve is formed, two upstream of the 3/2-way valve arranged supply lines with a downstream of the 3/2-way valve arranged line or discharge line connect to. As a result of this configuration, a mixing combination of the treatment liquid to be dispensed can optionally be set particularly precisely or the injection device can be realized in a particularly cost-effective manner.

Moreover, it is advantageous if the agricultural spraying device has a further metering valve, which is connectable by means of a further supply line to a further treatment liquid tank, arranged in the liquid line and is adapted to meter a further treatment liquid from the further treatment liquid tank into the liquid line. The further metering valve can be designed as a steadily adjustable valve. Preferably, the further metering valve is designed as a 3/2-way valve. More preferably, the further metering valve is disposed downstream of the first and second metering valves and upstream of the dispensing unit. This allows the

to be dispensed treatment liquid variable in time and flexible adapted to be treated agricultural area from the up to three

Treatment liquids and the carrier liquid can be generated. Finally, it is advantageous if the agricultural spray device is formed by means of an agricultural associated

Control device to be controlled in a total closed position. For this purpose, the control device is set up, the carrier liquid valve in a

To control closed position, to a passage or supply of

Carrier liquid from the carrier liquid tank in the liquid line to interrupt, and to control the metering valves in each case a closed position to a passage of the treatment liquids from the

Interrupt treatment liquid tanks in the liquid line.

As a result, the spray device is formed, a return of

To prevent carrier liquid in the treatment liquid tank or the supply lines to the treatment liquid tank when no treatment liquid is discharged.

It is of particular advantage if the method provides a step of controlling the carrier fluid valve in a closed position to allow passage of the carrier fluid line from the carrier fluid tank in the

Liquid line to break, then, when the received specification dictates controlling the metering valves in a Dosierventilstellung, by means of which the first and the second treatment liquid from the respective

Treatment liquid tank is guided into the liquid line. By this configuration, the treatment liquid to be dispensed is only then

Carrier liquid supplied by the carrier liquid valve or

Carrier liquid is metered into the liquid line when at least one of the metering valves is controlled in a closed position to interrupt passage of the metered from the at least one metering valve treatment liquid. A total volume flow of the liquid to be dispensed or dispensed consists of a sum of the partial volume flows of the liquids metered by the valves, the liquid line. Preferably, the total volume flow of the liquid to be dispensed is constant. Looks that

Method of dispensing a dispensing treatment liquid with only one dosed into the liquid line treatment liquid, it sees Method preferably dosing the carrier liquid in the

Treatment liquid before to keep constant the total volume flow of the treatment liquid to be dispensed. Preference may be given to interrupting a feeding or dosing of a treatment liquid in the

Liquid line can be compensated by the supply or dosing of the carrier liquid in the liquid line such that a volume flow of the liquid to be dispensed assumes a constant value.

Also of advantage is a computer program product or computer program with program code which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory and for carrying out, implementing and / or controlling the steps of the method according to one of the embodiments described above is used, especially when the program product or program is executed on a computer or a device.

drawings

The invention will be described below with reference to the accompanying drawings

exemplified in more detail. Show it:

Figure 1 is a schematic representation of an embodiment of an agricultural spray system with the spray device.

FIG. 2 shows a schematic illustration of an embodiment of an agricultural spraying device; FIG. and

3 is a flow chart of a method for dispensing a

Treatment liquid on an agricultural area.

In the following description of preferred embodiments of the present invention are for the in the various figures

represented and similar elements acting the same or similar

Reference is made to a repeated description of the

Elements is omitted. In Fig. 1, an agricultural spray system is shown, which is provided in its entirety by the reference numeral 10.

The agricultural spray system 10 includes a tractor 12 and a mounted sprayer 14 on the tractor 12.

The mounted sprayer 14 has a spray boom 16, a control device 18 and a tank unit 20 with a plurality of liquid tanks. The liquid tanks each contain a liquid.

The spray boom 16 is divided into several sections 22. Each of the

Partial sections 22 has a plurality of dispensing units 24 designed as spray nozzles 24. On each section 22 are several agricultural

Spray devices arranged. In this case, each spray nozzle 24 is assigned part exactly to an agricultural spray device. The agricultural

Spraying device comprises the respective spray nozzle and the spray nozzle 24 associated valves and liquid lines.

The spray nozzles 24 are connected to the tank unit 20 via hose connections (not shown). Thus, the spray nozzles 24 are formed to spray the liquid 26 to be dispensed from the tank unit 20 onto an agricultural surface 28.

Each of the spray nozzles 24 has a plurality of valves associated with the spray nozzle 24. The valves are arranged upstream of the associated spray nozzle 24 at the corresponding part width 22 and by means of one each

Hose connection with a liquid tank of the tank unit 20 is connected.

The control device 18 is electronically connected to each of the spray nozzles 24 such that the valves can be actuated automatically via the control device 18. Here, the valves are controlled such that the

Liquids from the liquid tanks of the tank unit 20 are metered into a liquid line opening in the spray nozzle 24. In Fig. 2, an agricultural spray device is shown, which is provided in its entirety by the reference numeral 11.

The agricultural spraying device 11 is part of the mounted sprayer 14 or of the agricultural spraying system 10.

The spray device 11 has a water tank 30 and three

Treatment liquid tanks 40, 42, 44 on. The water tank 30 contains water. The treatment liquid tanks 40, 42, 44 each contain a plant protection agent prediluted to a defined concentration.

Furthermore, the spray device 11 comprises a water valve 50 and three

Metering valves 54, 56, 58, the liquid line 60, and the spray nozzle 24. The water valve 50 is formed as a 2/2-way valve 50. The metering valves 54, 56, 58 are arranged in the liquid line 60. The metering valves 54, 56, 58 are designed as 3/2-way valves 54, 56, 58. The liquid line 60 is designed as a hose connection 60 and opens into the spray nozzle 24.

The water tank 30 is connected by means of a supply line 70 to the water valve 50. The treatment liquid tanks 40, 42, 44 are connected by means of supply lines 80, 82, 84 with the respective metering valve 54, 56, 58. The supply lines 70, 80, 82, 84 are formed as hose connections 70, 80, 82, 84.

The water valve 50 and the metering valves 54, 56, 58 are electronically controllable by means of the control device 18 of the spray system 10 assigned to the spray device 11. As a result, the water valve 50 is designed to meter water from the water tank 30 into the liquid line 60. Further, the metering valves 54, 56, 58 are formed, the respective treatment liquid from the associated with the respective metering valve 54, 56, 58

Treatment liquid tank 40, 42, 44 to meter into the liquid line 60. In this case, the control device 18 is designed to control the valves 50, 54, 56, 58 based on a specification of a mixing combination of the treatment liquid 26 to be dispensed by the control device 18. The spray device 11 is designed to deliver the liquid to be dispensed 26 at least for the following combinations of valve positions with a constant volume flow.

In a first combination, the water valve 50 assumes a closed position to allow the passage of water from the water tank 30 into the water

Liquid line 60 to interrupt, and the metering valves 54, 56, 58 each take a passage position to the treatment liquids from the

Treatment liquid tanks 40, 42, 44 to the liquid line 60th

pass.

In a second combination, the water valve 50 assumes a passageway to pass water from the water tank 30 to the liquid line 60, two of the metering valves 54, 56, 58 each take one

On passage position to pass the respective treatment liquids to the liquid line 60, and one of the metering valves 54, 56, 58 assumes a closed position to the passage of the respective

Treatment liquid in the liquid line 60 to interrupt.

Furthermore, the spray device 11 is designed to be controlled by means of the control device 18 in a preferred overall closing position. Here, the control device 18 is arranged to control the water valve 50 in a closed position to interrupt the passage of water from the water tank 30 into the liquid line 60, and the metering valves 54, 56, 58 in each case to control a closed position to a passage the treatment liquids from the treatment liquid tanks 40, 42, 44 to the liquid line 60 to interrupt.

3 shows a flowchart of a method for delivering a

Treatment liquid on the agricultural surface 28 by means of

Sprayer 11. The process is in its entirety with the

Reference numeral 100 provided.

The method comprises a step of receiving 110 specifying a mixing combination of the treatment liquid 26 to be dispensed by means of the control unit 18 assigned to the agricultural spraying device 11. Further, the method includes a step of controlling 120 the water valve 50 to a first water valve position based on the received default to meter water from a water tank 30 into the liquid line 60.

In addition, the method includes a step of controlling 130 the first metering valve 54 to a first metering valve position based on the received instruction to meter a first treatment fluid from the first treatment fluid tank 40 into the fluid conduit 60.

The method further comprises a step of controlling 140 the second metering valve 56 to a second metering valve position based on the received instruction to meter a second treatment liquid from the second treatment liquid tank 42 into the liquid line 60.

In addition, the method includes a step of controlling 150 the third metering valve 58 to a third metering valve position based on the

received default to dose a third treatment liquid from the third treatment liquid tank 44 in the liquid line 60.

Finally, the method comprises a step of dispensing 160 of the treatment liquid to be dispensed by means of the spray nozzle 24.

If an exemplary embodiment includes a "and / or" link between a first feature and a second feature, this is to be read such that the

Embodiment according to an embodiment, both the first feature and the second feature and according to another embodiment, either only the first feature or only the second feature.

Claims

claims

1. Agricultural spray device (11) for delivery of a dispensed

Treatment liquid (26) on an agricultural surface (28) by means of a dispensing unit (24), with

- A carrier liquid valve (50) by means of a

Carrier liquid supply line (70) with a carrier liquid tank (30) is connectable and formed, a carrier liquid from the

Carrier liquid tank (30) to be metered into a liquid line (60) connected to the dispensing unit (24),

- A first metering valve (54) by means of a first supply line (80) with a first treatment liquid tank (40) connectable, arranged and formed in the liquid line (60), a first treatment liquid from the first treatment liquid tank (40) in the liquid line ( 60), and

- A second metering valve (56) by means of a second supply line (82) with a second treatment liquid tank (42) connectable, arranged and formed in the liquid line (60), a second treatment liquid from the second treatment liquid tank (42) in the liquid line ( 60).

2. Agricultural spray device (11) according to claim 1, characterized

marked that

- The carrier liquid valve (50) has a valve position, by means of which a passage of the carrier liquid from the carrier liquid tank (30) in the liquid line (60) and / or

- At least one of the metering valves (54, 56) has a valve position, by means of which a passage of the respective treatment liquid from the respective treatment liquid tank (40, 42) in the

Liquid line (60) is interruptible.

3. Agricultural spray device (11) according to claim 1 or 2, characterized in that - Each of the metering valves (54, 56) has a valve position by means of which a volume flow of the respective in the liquid line (60) metered treatment liquid for each metering valve (54, 56) is the same size.

4. Agricultural sprayer (11) after one of the previous

Claims, characterized in that

- The carrier fluid valve (50) and / or at least one of

Metering valves (54, 56) as a continuously adjustable valve and / or

- The carrier liquid valve (50) as a 2/2-way valve (50) and / or at least one of the metering valves (54, 56) as 3/2-way valves (54, 56) are formed.

5. Agricultural sprayer (11) after one of the previous

Claims, characterized by a further metering valve (58) which by means of a further supply line (84) with a further treatment liquid tank (44) connectable, arranged and formed in the liquid line (60), a further treatment liquid from the other

To dose treatment liquid tank (44) in the liquid line (60).

6. A method (100) for dispensing a treatment liquid (26) to be delivered to an agricultural area (28) by means of an agricultural spraying device (11) having a dispensing unit (24), comprising the following steps:

Receiving (110) a specification of a mixing combination of

to be dispensed treatment liquid (26) by means of one of

agricultural spray device (11) associated control unit (18);

- controlling (120) a carrier fluid valve (50) into a first one

Carrier fluid valve position based on the received specification to dose a carrier fluid from a carrier fluid tank (30) into a fluid line (60),

Controlling (130) a first metering valve (54) into a first one

Dosing valve position based on the received specification to a first treatment liquid from a first

Dosing treatment liquid tank (40) into the liquid line (60), - controlling (140) a second metering valve (56) in a second

Dosierventilstellung based on the received default to a second treatment liquid from a second

Dosing treatment liquid tank (42) in the liquid line (60),

- Wherein at least one of the valves (50, 54, 56) is controlled in a closed position to allow passage of at least one liquid from the respective tank (30, 40, 42) in the liquid line (60)

break; and

- Dispensing (160) of the dispensed treatment liquid (26) by means of the dispensing unit (24).

7. The method according to claim 6, characterized by a step of

Controlling the carrier liquid valve (50) to a closed position to interrupt passage of the carrier liquid from the carrier liquid tank (30) into the liquid line (60), if the received preset dictates controlling the metering valves (54, 56) to a metering valve position, by means of which the first and the second treatment liquid from the respective treatment liquid tank (40, 42) of the liquid line (60) is supplied.

A computer program adapted to perform the method (100) of claim 6 or 7.

9. Machine-readable storage medium with a stored on it

Computer program according to claim 8.

10. control device (18) for controlling a delivery of a treatment liquid (26) to be delivered to an agricultural surface (28) by means of an agricultural spraying device (11) having a dispensing unit (24), wherein the control device (18) is set up,

- a specification of a mixing combination of the delivered

Receiving treatment liquid (26);

- A carrier liquid valve (50) in a first

Carrier fluid valve position based on the received preset to meter a carrier liquid from a carrier liquid tank (30) into a liquid line (60),

to control a first metering valve (54) in a first metering valve position based on the received default to a first metering valve position (54)

Dosing treatment liquid from a first treatment liquid tank (40) into the liquid line (60),

to control a second metering valve (56) in a second metering valve position based on the received preset to a second

Dosing treatment liquid from a second treatment liquid tank (42) into the liquid line (60),

break; and

- controlling the dispensing unit (24) to deliver the

Dispensing treatment liquid (26) by means of the dispensing unit (24).

11. agricultural spray system (10) with a carrier liquid tank (30), a first and a second treatment liquid tank (40, 42) and an agricultural spray device (11) according to one of claims 1 to 5 and a control device (18) according to claim 10.