EP2891446B1 - Dishwasher - Google Patents

Description

The invention relates to a Geschirrautomaten, in particular in the embodiment of a program-controlled dishwasher, with a washing compartment providing a Spülbehälter and a rotatably mounted within the Spülbehälters arranged spray arm, the spray arm cleaning nozzles for each generation of a Reinigungssprühkegels on the one hand and preferably end of the Sprüharms trained drive nozzles for each generation a drive jet on the other hand, which nozzles are connected to the feed with rinsing fluid in terms of flow to a circulation pump.

Dishwashers in general and program-controlled dishwashers in particular are well known in the art. Separate documentary proof is therefore not required.

Generic automatic dishwashers have a washing container that provides a washing compartment. When used as intended, the washing compartment provided by the washing compartment receives items to be cleaned. In this case, a feed opening provided by the washing container is provided for charging the washing compartment with items to be cleaned. The latter can be closed in a fluid-tight manner by means of a flushing door, wherein the flushing door is typically pivotably mounted about a horizontally extending pivot axis.

For a loading of items to be cleaned with rinse liquor is a spray. This provides within the washing container rotatably arranged spray arms. These are typically supplied with rinsing fluid via a circulation pump. Depending on the configuration of the dishwasher, two, three or more spray arms can be provided.

A spray arm has two groups of nozzles. On the one hand, cleaning nozzles and, on the other hand, drive nozzles are provided. The cleaning nozzles serve in the intended use of the respective generation of a Reinigungssprühkegels, which is delivered in the direction of the items to be cleaned. The drive nozzles are preferably formed at the end of the spray arm and serve, however, the rotary drive of the spray arm.

Both the cleaning nozzles and the drive nozzles are in fluid communication with a distribution chamber provided by the respective spray arm. When used as intended, rinsing fluid conveyed by the circulating pump flows into the distribution chamber of the spray arm, from where both the cleaning nozzles and the drive nozzles are operated with rinsing liquor.

Dishwasher provide a variety of possible washing programs available that can be selected by the user, usually depending on the degree of contamination of the dishes to be cleaned. In this case, depending on the user-selected wash program operation of the circulation pump with different circulation pump speeds take place, which set different volume flows of wash liquor during the course of the wash program depending on the pump speed. Thus, with a higher pump speed, the volume flow of rinsing liquor promoted with the circulating pump also increases. In this way, the fact of particularly dirty items to be taken into account.

Although the increased pump speed and the concomitant increased volume flow of rinsing liquor, although an improvement in the cleaning results can be achieved, the desired effect is not achieved. This is due to the fact that with increased volume flow, the pressure within the distribution chamber of the spray arm increases, which leads to the consequence that over the respective drive nozzles of the spray arm, a pressure-increased drive beam is discharged, which ultimately leads to an increased rotational speed of the spray arm. As a consequence of this increased rotational speed of the spray arm, the cleaning spray cones emitted by the cleaning nozzles pass too quickly past the soiling of the items to be cleaned, so that the actually desired improved cleaning effect is not reliably achieved in full despite increased volume flow. Depending on the nature of the buildup and soiling of the items to be cleaned, it may even lead to a deterioration of the cleaning result despite increased volume flow of wash liquor.

The EP 1586264 A2 describes a dishwashing machine with a spray arm having cleaning nozzles with adjusting units, which are released only at an increased pump pressure by utilizing this pressure these cleaning nozzles. As a result, an intensive scavenging zone is formed which can be switched on and off in a simple manner by means of the pump speed.

The DE 2143111 A1 describes a dishwashing machine with a spray arm, which has an adjustment unit with which the direction of rotation of the spray arm can be changed when the circulation pump is briefly off and then turned on again.

It is based on the above therefore the object of the invention to provide a dishwasher of the type mentioned, which is structurally further developed so that with increased pump pressure, an actually improved cleaning result can be achieved reliably.

To solve this problem, a dishwashing machine of the type mentioned is proposed with the invention, which is characterized in that the drive nozzles are each equipped with an adjustment that adjusts the spray characteristic of the drive jet of the respective drive nozzle as a function of the pump pressure.

The drive nozzles of the dishwasher are according to the invention each equipped with an adjustment. This serves to adjust the spray characteristic of the drive jet as a function of the pump pressure. It can thus be achieved independent of the pump pressure rotational speed of each spray arm, that is, the rotational speed of the spray arm remains unchanged even with increasing pump pressure. As a consequence, the associated increase in volume flow can be used effectively to achieve an improved cleaning result with increased pump pressure, since an increase in the Sprüharmdrehgeschwindigkeit does not take place with simultaneous Spülflottenmehrabgabe on the cleaning nozzles.

By increasing the pump speed, in particular, the speed of the rinsing fluid emerging from the cleaning nozzles is increased, which at the moment of impingement of the rinsing liquor on the ware to be cleaned leads to an improved detachment of soiling, and consequently to an improved cleaning result. It will this improved cleaning result is not minimized by a pressure increased Spülflottenabgabe on the drive nozzles and a concomitant increase in Sprüharmdrehzahl. The adjustment unit provided according to the invention for each drive nozzle ensures that the spray characteristic of the drive jet of the respective drive nozzle is adjusted to achieve a rotational speed of the spray arm independent of the pump pressure as a function of the pump pressure. The rotational speed of the spray arm thus remains substantially unchanged despite increased pump pressure.

The adjustment unit provided according to the invention may be designed in different ways. According to a first embodiment, the adjusting unit has a flow throttle. This ensures that the amount of wash liquor dispensed via the drive nozzles is throttled with increasing pump pressure. As a result, a constant rotational speed of the spray arm is achieved even with increasing pump pressure.

The flow restrictor may according to a particular proposal of the invention comprise a membrane, which is arranged upstream of the nozzle outlet in the flow direction of the wash liquor, preferably leaving an annular gap. In this case, the annular gap defines the flow opening for the wash liquor. With increasing pump pressure, a corresponding deformation of the membrane occurs, which in consequence leads to a reduction of the annular gap. Thus, the higher the pump pressure, the smaller the flow-through opening defined by the annular gap for the rinsing liquor, that is, the lower the volume flow delivered via the respective drive nozzle. The membrane acts in this respect as a speed throttle.

According to an alternative embodiment, the adjusting device has a closure element for at least partially closing the nozzle outlet. With increasing closure of the nozzle exit, the angle enclosed between the spray arm and the drive jet changes. At normal pressure, that is to say in the case of a standard rinsing program, there is typically a 90 ° angle between the spray arm and the drive jet of a drive nozzle. At elevated pressure, the closure element provided according to the invention is guided over the outlet opening of the drive nozzle, whereby it comes to a partial closing of the outlet opening with the consequence that the drive beam is deflected in the direction of the axis of rotation of the spray arm, that of the spray arm and the drive beam enclosed angle becomes smaller. Despite increased speed of the drive jet as a result of the pressure increase, this does not also result in an increased spray arm rotational speed.

It is preferred that the closure element is held under spring bias in the open position. At elevated pressure, the closure element is moved counter to the spring pressure for at least partially closing the nozzle occurrence, wherein the closure element moves corresponding to the applied pressure and thus corresponding to the pressure takes place a corresponding closing of the nozzle outlet. Thus, the higher the rinsing pool pressure, the further the nozzle outlet is closed and the greater the deflection of the drive jet.

According to a further alternative of the invention, the drive nozzle is designed to be rotatable. The adjusting device has in this case a rotary drive for the drive nozzle. In this case, the rotational drive is aligned flushing raft pressure dependent, so that with increasing Spülflottendruck a correspondingly wide rotational position of the drive nozzle is accompanied. As a consequence, a corresponding deflection of the drive jet occurs in the already described manner, so that a constant constant rotational speed of the spray arm is ensured despite increased rinsing fluid pressure.

According to a further alternative of the invention it is provided that the adjusting device has a locking member for changing the cross section of the nozzle outlet, the nozzle side provides a baffle surface.

According to this embodiment, a locking member is provided, which moves in response to the applied rinsing liquid pressure relative to the drive nozzle and thus changes the free flow area of the nozzle outlet. The locking member also provides the nozzle side a baffle so that it is not only a change in the flow cross-section at increased rinsing fluid pressure, it is also generated another spray pattern, so that in consequence a constant constant rotational speed of the spray is achieved even at elevated rinsing fluid pressure.

It is provided according to a further feature of the invention that the locking member is held in the open position by means of an elastically deformable element, whereby the locking member is always trying to move to its starting position. At elevated pressure the rinsing liquor works against this elastically deformable element, which may be formed, for example, as a membrane or as a spring element.

Fig. 1

in schematischer Darstellung einen nach der Erfindung ausgebildeten Sprüharm gemäß einer ersten Ausführungsform;

Fig. 2

den Sprüharm nach Fig. 1 in einer schematischen Seitenansicht in einer ersten Stellung der Antriebsdüsen;

Fig. 3

den Sprüharm nach Fig. 1 in einer schematischen Seitenansicht in einer zweiten Stellung der Antriebsdüsen;

Fig. 4

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß einer weiteren Ausführungsform mit einer in einer ersten Stellung befindlichen Antriebsdüse;

Fig. 5

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß Fig. 4 mit einer in einer zweiten Stellung befindlichen Antriebsdüse;

Fig. 6

in einer schematischen Seitenansicht den Sprüharm nach Fig. 4;

Fig. 7

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß einer weiteren Ausführungsform mit einer in einer ersten Stellung befindlichen Antriebsdüse;

Fig. 8

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß Fig. 7 mit einer in einer zweiten Stellung befindlichen Antriebsdüse;

Fig. 9

in einer schematischen Seitenansicht den Sprüharm nach Fig. 7;

Fig. 10

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß einer weiteren Ausführungsform mit einer in einer ersten Stellung befindlichen Antriebsdüse;

Fig. 11

in schematischer Ausschnittsdarstellung den erfindungsgemäßen Sprüharm gemäß Fig. 10 mit einer in einer zweiten Stellung befindlichen Antriebsdüse;

Fig. 12

in einer schematischen Seitenansicht den Sprüharm nach Fig. 10;

Fig. 13

in schematischer Seitenansicht den erfindungsgemäßen Sprüharm gemäß einer weiteren Ausführungsform mit einer in einer ersten Stellung befindlichen Antriebsdüse;

Fig. 14

in schematischer Seitenansicht den erfindungsgemäßen Sprüharm gemäß Fig. 13 mit einer in einer zweiten Stellung befindlichen Antriebsdüse;

Fig. 15

in schematischer Seitenansicht einen Geschirrspülautomaten.

Further features and advantages of the invention will become apparent from the following description with reference to FIGS. Showing:

Fig. 1

a schematic representation of a trained according to the invention spray arm according to a first embodiment;

Fig. 2

after the spray arm Fig. 1 in a schematic side view in a first position of the drive nozzles;

Fig. 3

after the spray arm Fig. 1 in a schematic side view in a second position of the drive nozzles;

Fig. 4

in a schematic sectional view of the spray arm according to the invention according to a further embodiment with a drive located in a first position nozzle;

Fig. 5

in a schematic sectional view of the spray arm according to the invention Fig. 4 with a drive nozzle in a second position;

Fig. 6

in a schematic side view of the spray arm Fig. 4 ;

Fig. 7

in a schematic sectional view of the spray arm according to the invention according to a further embodiment with a drive located in a first position nozzle;

Fig. 8

in a schematic sectional view of the spray arm according to the invention Fig. 7 with a drive nozzle in a second position;

Fig. 9

in a schematic side view of the spray arm Fig. 7 ;

Fig. 10

in a schematic sectional view of the spray arm according to the invention according to a further embodiment with a in a first position located drive nozzle;

Fig. 11

in a schematic sectional view of the spray arm according to the invention Fig. 10 with a drive nozzle in a second position;

Fig. 12

in a schematic side view of the spray arm Fig. 10 ;

Fig. 13

in a schematic side view of the spray arm according to the invention according to another embodiment with a drive in a first position drive nozzle;

Fig. 14

in a schematic side view of the spray arm according to the invention Fig. 13 with a drive nozzle in a second position;

Fig. 15

in a schematic side view of a dishwasher.

Fig. 15 can be seen in a schematic view of a dishwasher 1, as it is also known from the prior art.

The dishwasher 1 has a housing 2. Within the housing 2, a washing container 3 is arranged, which provides a washing compartment 4. The washing compartment 4 is accessible via a charging opening 5 which can be closed in a fluid-tight manner by means of a flushing door 6.

When used as intended, the washing compartment 4 serves to receive items to be cleaned. For the positioning of the items to be cleaned to be cleaned within the washing compartment 4 serve in the figure, not shown Spülkörbe. These can be moved on the user side out of the washing compartment 4 or introduced into it.

For the purpose of loading of items to be cleaned with rinse liquor, a spray device 10 is used, which has spray arms 11 and 12 in the illustrated embodiment. The spray arms 11 and 12 are each rotatably mounted within the washing container 3, wherein the spray arm 11 rotates about the axis 13 and the spray arm 12 about the axis 14. The axes 13 and 14 form preferably a common axis of rotation.

The rinsing tank 3 opens into a collecting pot 7, to which a circulating pump 8 is fluidically connected, which is connected by means of a line 9 to the spray device 10, that is, the two spray arms 11 and 12 fluidly.

The circulating pump 8 is used in the intended use of the circulation of the intended for charging the ware wash solution. This is discharged via the spray arms 11 and 12 on the items to be cleaned, from where it drips and the bottom of the washing container 3 accumulates in the collecting pot 7, from where by means of the circulation pump 8, a redistribution can take place on the spray arms 11 and 12.

The spray arms 11 and 12 each have cleaning nozzles 19 on the one hand and via drive nozzles 21 on the other hand, as shown in FIG Fig. 1 is shown by way of example with reference to the spray arm 12 according to the invention.

As Fig. 1 can be seen, the spray arm 12 is formed of an upper shell 15 and a lower shell 16, which form between them as a distribution chamber 17 serving volume space. The upper shell 15 has an access opening 18 through which, in the intended use case, rinsing fluid flows into the spray arm 12, that is to say into the distribution chamber 17 provided by the spray arm 12. From there, the rinsing liquor reaches the cleaning nozzles 19 on the one hand and the drive nozzles 21 on the other hand.

The cleaning nozzles 19 are used for the respective generation of a Reinigungssprühkegels 20, as this example in Fig. 15 are shown. By means of the spray nozzles 19 thus takes place a delivery of rinsing water to the items to be cleaned.

The drive nozzles 21 serve to generate a respective drive jet and, in the intended use, provide for a rotational movement of the spray arm about its respective axis of rotation. The drive nozzles 21 are preferably formed for this purpose end of each spray arm, as can be seen from the illustration Fig. 1 can be removed.

The circulation pump 8 is operable with an optionally adjustable speed. It increases with increasing pump speed funded by the circulation pump 8 Volume flow of rinsing liquor. As a consequence, this leads to an increase in pressure within the spray arm, so that the washing liquor is conveyed out of the cleaning nozzles 19 on the one hand or the drive nozzles 21 on the other hand at an increased speed. The increased exit velocity is desirable with regard to the cleaning nozzles 19, since this allows an improved detachment of soiling from the items to be washed can be achieved. However, an increased exit speed with respect to the drive nozzles 21 is not desired since this results in an increased rotational speed of the spray arm. As a consequence, the cleaning spray cones 20 emitted by the cleaning nozzles 19 rapidly slip past the soiling of the ware to be cleaned, which then results in a reduced cleaning result as a consequence. In this respect, it is endeavored, despite the increased pressure within the spray arm, to achieve a rotational speed of the spray arm which is unchanged compared with normal pressure.

According to the invention, an adjusting unit is provided for achieving a pump speed independent rotational speed of the spray arm 11 or 12 per drive nozzle 21, which adjusts the spray characteristic of the drive jet of the respective drive nozzle 21 as a function of the pump pressure.

With regard to the configuration of the adjusting unit 22 different structural variants are possible, wherein the FIGS. 1 to 14 show preferred embodiments.

According to a first embodiment, which in the FIGS. 1, 2 and 3 is shown, the adjustment unit 22 has a flow restrictor. This has a membrane 23, which is connected upstream of the nozzle outlet 24 in the flow direction of the rinsing fluid leaving an annular gap.

In the FIGS. 2 and 3 Two spray arm states are shown with different pump pressures. As shown Fig. 2 the spray arm is pressurized with a standard pump pressure p _s . According to this pump pressure results in a cleaning pressure p _R1 and a driving pressure p _A1 , which opens into a driving force F _A1 . When applying the standard pump pressure p _s , for example, a speed of the rotary arm 12 of 20 revolutions per minute is achieved. If now the pump speed of the circulation pump 8 is increased, then it happens an increased pressure p _e within the distribution chamber 17 provided by the spray arm 12, as shown in FIG Fig. 3 results. As a result of this increased pressure, the cleaning pressure also increases to p _R2 > p _R1 .

The increased pressure setting within the distribution chamber 17 results in a deformation of the membrane 23, as a result of which a reduction of the annular gap formed between the membrane 23 and the lower shell 16 of the spray arm 12 occurs. As a result, only a reduced volume flow of rinsing fluid can pass through the nozzle outlet 24 of the drive nozzle 21. As a consequence, a drive pressure p _A2 results within the drive _nozzle , which essentially corresponds to the drive pressure p _A1 according to standard pressurization. As a result, in spite of the increased pressure within the distribution chamber 17, the driving force F _A2 caused by the driving nozzle 21 does not increase, and thus is approximately equal to the driving force F _A1 according to standard pressurization. Despite increased pressure within the distribution chamber 17, this results in a substantially unchanged speed of the spray arm 12.

According to a further feature of the invention, a switching behavior with hysteresis is also conceivable. Thereafter, it could be provided, for example, that the Sprüharmdrehzahl increases with increasing volume flow and after a short time to change back to the standard Sprüharmdrehzahl.

So that the nozzle outlet 24 is not completely blocked by the membrane 23, it is also proposed to form spacer ribs on the underside of the membrane 23, which in the figures according to the FIGS. 1, 2 and 3 not shown in particular. At maximum applied pump pressure, the diaphragm 23 is supported in this case via their spacer ribs at a defined distance from the nozzle outlet 24 with respect to the lower shell 16 of the spray arm 12. It is set as a defined outlet cross-section and thus a defined rotational speed. The minimum on the one hand and the maximum on the other hand possible pump pressure determines the design of the membrane 23rd

Another embodiment is the FIGS. 4, 5 and 6 refer to. According to this variant, the exit angle of the drive jet leaving the drive nozzle 21 is adjusted in a pressure-dependent manner. The drive nozzle 21 itself is fixed, so it is not twisted or otherwise designed to be movable. The exit angle of the spray is through a Closing element 25 determined. This closure element 25 is spring-loaded by means of a spring 27 and is at its default position p _s in its starting position, as in FIG Fig. 4 shown.

The closure element 25 provides an impact surface 26 on its side opposite the spring 27. On this baffle 26 acts in the distribution chamber 17 conveyed rinsing. Now, the pump pressure increases to an increased pressure p _n , which is greater than the standard pressure p _s , the closure member 25 is against the spring 27 acting on it with respect to the plane of the drawing after the FIGS. 4 or 5 shifted to the right. As a result, there is a partial closure of the nozzle outlet 24, which in turn leads to a deflection of the discharge jet 26 in the direction of the axis of rotation of the spray arm. The trapped by exit jet and spray arm 12 angle thus decreases, as in the FIGS. 4 and 5 recognize indicated arrows. As a result of this angular change occurs despite increased pressure within the spray arm 12 does not increase the Sprüharmdrehgeschwindigkeit.

Another alternative is the FIGS. 7, 8 and 9 refer to. According to this embodiment, the drive nozzle 21 is rotatably mounted. The nozzle exit 24 is provided by a rotatable disc 29. This is equipped with a pin or pivot pin 30 which engages in a slot 32 of a driver 31. The driver 31 is supported with the interposition of a spring 33 relative to the inside of the spray arm 12, wherein the spring 33 is dimensioned such that the drive nozzle 21 at standard pressure p _s in the in Fig. 7 shown starting position moves.

The driver 31 provides on its side opposite the spring 33 a baffle 26 ready against which the wash liquor acts upon introduction into the distribution chamber 17. Once an introduction of wash liquor takes place with increased pressure, the driver 31 against the spring force acting on it with respect to the plane of the drawing after the FIGS. 7 or 8 to the right. As a result, it comes with the interposition of the pin 30 to a corresponding deflection of the disc 29 and thus to a rotational movement of the drive nozzle 21. As a result of this twisting movement, a changed exit angle between the spray arm 12 and exit jet. The Sprüharmdrehgeschwindigkeit can thus be kept constant even with increasing pressure.

Another embodiment show the FIGS. 10, 11 and 12 , wherein also here a change of the exit angle is reached. According to this embodiment, a pivotally mounted drive nozzle 21 is used, which is located on the outer circumference of a pivot arm 34. In this case, the pivot arm 34 is supported on the spray arm 12 with the interposition of a spiral spring 35.

The coil spring 35 moves the drive nozzle 21 depending on the pump pressure within two angular positions. In this case, the spiral spring 35 is arranged with its one end on the spray arm 12 and with its other end on the pivot arm 34. A Sprühwinkeleinstellung depending on the applied pump pressure is ensured in an advantageous manner.

Another alternative embodiment of the invention is shown in FIGS FIGS. 13 and 14 shown. According to this embodiment, a locking member 36 is used, which serves to change the exit surface provided by the nozzle outlet 24. The locking member 36 is coupled to a resilient member, in the illustrated embodiment with a diaphragm 37. With increasing pump pressure, the diaphragm 37 deforms elastically, as in Fig. 14 is shown. As a result, there is an immigration of the locking member 36 into the nozzle outlet 24, as a result, is accompanied by a change in cross section, so that at elevated pressure p _E less volume flow of rinsing water through the nozzle outlet 24 can be dispensed. In addition, another spray pattern is set, since a different radiation angle with respect to the spray arm 12 leaving and on the baffle 36 provided by the baffle surface 36 impinging washing solution is reached. In combination of a modified outlet area on the one hand and a modified spray pattern on the other hand, a speed of the spray arm 12 which is unchanged even with an increased pump pressure p _E compared to the standard pump pressure is thus ensured.

reference numeral

1

dishwasher

2

casing

3

rinse tank

4

Wash cabinet

5

loading port

6

door

7

collecting pot

8th

circulating pump

9

management

10

spraying

11

spray arm

12

spray arm

13

axis

14

axis

15

Upper shell

16

subshell

17

distribution chamber

18

access opening

19

cleaning nozzle

20

spray cones

21

drive nozzle

22

adjustment

23

membrane

24

nozzle exit

25

closure element

26

baffle

27

feather

28

turning drive

29

disc

30

Pin or pivot pin

31

takeaway

32

Long hole

33

feather

34

swivel arm

35

spiral spring

36

locking member

37

membrane

38

baffle

Claims (10)

1. Automatic dishwasher, in particular a program-controlled dishwasher, comprising a washing container (3) that provides a washing chamber (4), and a spray arm (11, 12) that is arranged inside the washing container (3) so as to be rotatable, the spray arm (11, 12) comprising, on the one hand, cleaning nozzles (19) for each generating a cleaning spray cone (20) and, on the other hand, drive nozzles (21) that are preferably formed on the end face of the spray arm (11, 12) for each generating a drive jet for rotatably driving the spray arm (11, 12), which nozzles (19, 21) are fluidically connected to a circulating pump (8) in order to be supplied with the washing solution,
   characterised in that
   the drive nozzles (21) are each equipped with an adjustment unit (22) that sets the spray characteristics of the drive jet of the relevant drive nozzle (21) according to the pump pressure in such a way that a rotational speed of the spray arm (11, 12) that is independent of the pump pressure can be achieved.
2. Automatic machine according to claim 1, characterised in that the adjustment unit (22) comprises a flow restrictor.
3. Automatic machine according to claim 2, characterised in that the flow restrictor comprises a membrane (23) that is upstream of and spaced apart from the nozzle outlet (24) in the flow direction of the washing solution, preferably so as to leave an annular gap.
4. Automatic machine according to claim 1, characterised in that the adjustment device (22) comprises a closing element (25) for closing the nozzle outlet (24) at least in part.
5. Automatic machine according to claim 4, characterised in that the closing element (25) comprises a baffle (26).
6. Automatic machine according to either claim 4 or claim 5, characterised in that the closing element (25) is held in an open position under spring-preloading.
7. Automatic machine according to claim 1, characterised in that the drive nozzle (21) is designed to be rotatable.
8. Automatic machine according to claim 7, characterised in that the adjustment device (22) comprises a rotary drive (28) for the drive nozzle (21).
9. Automatic machine according to claim 1, characterised in that the adjustment device (22) comprises a blocking element (36) for changing the cross section of the nozzle outlet (24), which blocking element provides a baffle (38) on the nozzle side.
10. Automatic machine according to claim 9, characterised in that the blocking element (36) is held in an open position by means of an elastically deformable element.

Images