Output device for outputting a liquid jet surrounded by an air flow sleeve

Abstract

The present invention relates to an output device (10) for outputting a liquid jet (18) that is sleeved by an airflow and fan-shaped in a beam plane (16). The output device includes a beam generating component (12) having a flat beam nozzle (30) for generating the liquid jet (18), and an air-enveiling component (14) for enveloping the liquid jet (18) with an airflow. The air-enveiling component (14) has a receiving section (66) for receiving the liquid jet (18) and an output section (68) for outputting the liquid jet (18) and the airflow enveloping the liquid jet. The receiving section (66) is in flow connection with at least one air intake opening (70, 72). The output section (68) extends to an exit opening (64) and fan-shaped in the beam plane (16). The distance between the outlet opening (64) and the nozzle discharge opening of the flat beam nozzle (30) is measured in centimeters and is at least 0.16 times the percentage increase of the preset cleaning width plus a fixed value of 9 cm, wherein the percentage increase of the cleaning width refers to the percentage increase related to the cleaning width that can be achieved using the flat beam nozzle (30) without using the air-encasing component (14) at the same cleaning intensity.

Description

Technical Field

[0001] The present invention relates to an output device for outputting a liquid jet that is sleeved by an airflow and fan-shaped in the beam plane, wherein the output device includes a beam generating component having a flat beam nozzle for generating the liquid jet, and an air-enveiling component for enveloping the liquid jet with an airflow, wherein the air-enveiling component has a through channel having a receiving section for receiving the liquid jet and an output section for outputting the liquid jet and the airflow enveloping the liquid jet, wherein the receiving section is in flow connection with at least one air intake opening of the output device, and the output section extends to an exhaust opening and fan-shaped in the beam plane. Background Technology

[0002] A beam generating component with a flat beam nozzle is used to generate a liquid jet that expands in a fan shape in the beam plane, for example as an accessory for pressure cleaning equipment, particularly high-pressure cleaning equipment, so that the fan-shaped liquid jet can be brushed across the surface to be cleaned. The beam generating component can, for example, be designed as a beam tube with an integrated flat beam nozzle. Pressurized water can be used, for example, as the liquid. Such a flat beam nozzle is known from WO 2014 / 090333 A1.

[0003] The fan-shaped liquid jet emanating from the flat beam nozzle undergoes interaction with the surrounding air in its path to the surface to be cleaned. This results in the liquid jet slowing down and losing compactness, thus affecting the achievable cleaning intensity. To counteract this effect, JP 2004223409 A proposes an output device in which, in addition to a jet-generating component in the form of a supply pipe (which carries a flat beam nozzle at its free end), an air-enveloping component is used to envelop the liquid jet using an airflow, wherein the airflow sleeve-like surrounds the liquid jet supplied by the flat beam nozzle. The air-enveloping component has a through channel with a receiving section and an output section. The receiving section receives the liquid jet emitted from the flat beam nozzle and is in flow connection with a plurality of air intake openings. The output section extends from the receiving section to the exit opening of the air-enveloping component and expands in the jet plane as it gets closer to the exit opening. Under the influence of the liquid jet, air is drawn into the through-channel through the air intake opening. The through-channel forms an air sleeve, which encloses the liquid jet and is output together with the liquid jet through the exhaust opening. The air sleeve surrounding the fan-shaped liquid jet reduces the interaction between the liquid jet and the surrounding air.

[0004] The output device, by using an air-encapsulating component, can clean a wider surface area with the same cleaning intensity when guiding a liquid jet along the surface to be cleaned, compared to using a flat jet nozzle without an air-encapsulating component. Therefore, a greater cleaning width can be achieved on the surface to be cleaned. Advantageously, the output device can be designed to achieve a percentage increase in the predetermined cleaning width compared to the cleaning width achievable with the same flat jet nozzle without an air-encapsulating component at the same cleaning intensity. Summary of the Invention

[0005] Therefore, the objective of this invention is to improve the type of output device so that a predetermined cleaning width can be increased by a percentage compared to the cleaning width achievable with the same flat beam nozzle without the use of an air-enveloping component at the same cleaning intensity.

[0006] In the aforementioned type of output device, this task is solved according to the invention in such a way that the distance (measured in centimeters) between the exit opening of the air-envelope component and the exit opening of the flat beam nozzle is at least 0.16 times the percentage increase of the preset cleaning width plus a fixed value of 9 cm, wherein the percentage increase of the cleaning width refers to the percentage increase related to the cleaning width that can be achieved using the flat beam nozzle without using the air-envelope component at the same cleaning intensity.

[0007] "Cleaning width" is understood as the width of the surface stripes on the surface to be cleaned, in which a predetermined cleaning intensity is achieved when a liquid jet is guided along the surface once at a constant speed and oriented perpendicular to the surface, wherein the width of the surface stripes is measured in the beam plane of the liquid jet. The predetermined cleaning intensity can be, for example, a predetermined percentage removal of the surface coating of the surface to be cleaned. The liquid jet can be guided along the surface to be cleaned, for example, at a relative speed of 10 cm / s, wherein the liquid jet is directed perpendicular to the surface. The predetermined percentage removal can be, for example, between 20% and 100% of the surface coating, particularly 50%. The surface to be cleaned can be, for example, a plastic sheet coated with disperse dye made of extruded polystyrene. If the plastic sheet coated with disperse dye is loaded with a liquid jet, then at least partially removing the disperse dye can be achieved. When using black disperse dye applied to a white plastic sheet made of extruded polystyrene, the cleaning intensity achievable by means of a liquid jet is manifested as a brightening of the surface of the plastic sheet to which the liquid jet is loaded. If the liquid jet moves relative to the plastic plate at a constant speed and is perpendicular to the plastic plate, a striped, brightened surface area is formed. The width of the brightened surface area represents the achievable cleaning width. When using the output device according to the invention, this cleaning width is greater than the width of the same brightened striped surface area achievable under the same conditions using a flat jet nozzle without an air-encasing component. The desired percentage increase in cleaning width determines the distance required for that percentage increase between the escaping opening of the air-encasing component and the nozzle discharge opening of the flat jet nozzle. That is, the distance required for that percentage increase in cleaning width between the escaping opening of the air-encasing component and the nozzle discharge opening of the flat jet nozzle is at least 0.16 times the desired percentage increase in cleaning width plus a fixed value of 9 cm.

[0008] In this invention, it is understood that there is a specific linear relationship between the percentage increase in the preset cleaning width and the distance between the exhaust opening of the air-enveloping component and the nozzle discharge opening of the flat beam nozzle required for that increase. That is, for a percentage increase of at least 20% to 75%, the preset percentage increase in cleaning width can be achieved by the distance between the exhaust opening of the air-enveloping component and the nozzle discharge opening of the flat beam nozzle—measured in centimeters—being at least 0.16 times the preset percentage increase in cleaning width plus a fixed value of 9 cm. It should be noted that this distance can vary by ±5% based on tolerances caused by manufacturing and measurement techniques. As already mentioned, the percentage increase in cleaning width refers to the percentage increase related to the cleaning width achievable with the same cleaning intensity using the same flat beam nozzle without the air-enveloping component.

[0009] For example, if, by means of the output device according to the invention, when the liquid jet is smoothly guided along the surface to be cleaned at a relative speed of 10 cm / s and the liquid jet is oriented perpendicular to the surface, to achieve a 50% increase in cleaning width compared to the cleaning width achievable using a flat jet nozzle of the output device without using an air-encasing component at the same cleaning intensity, then it is necessary that the output device be designed such that the distance between the escaping opening of the air-encasing component and the nozzle discharge opening of the flat jet nozzle is at least 17 cm.

[0010] Preferably, the percentage increase of the preset cleaning width is 20% to 75%.

[0011] Advantageously, the distance between the outlet of the air-envelope component and the nozzle discharge opening of the flat beam nozzle is at most 0.16 times the percentage increase of the preset cleaning width plus an additional fixed value, which is at most 13.5 cm, and especially 11 cm. As a result, the impact on the maximum achievable cleaning intensity and operability of the output device can be kept very small.

[0012] In an advantageous design of the output device according to the invention, the output section, which extends in a fan shape in the beam plane, has an opening angle of 20° to 30°, particularly 25°, in the beam plane. This opening angle allows for particularly effective use of air to enclose the liquid beam within the output section, thereby preventing the liquid beam from being affected.

[0013] The output device according to the invention is preferably designed to output a liquid with a pressure of 10 bar to 300 bar. The liquid pressure can be, in particular, between 70 bar and 250 bar.

[0014] Advantageously, the output device is designed to output liquids with a volumetric flow rate of 300 l / h to 3000 l / h, especially 300 l / h to 1300 l / h, particularly preferably 400 l / h to 500 l / h, for example 490 l / h.

[0015] In a preferred design of the output device according to the invention, the flow cross-section of the receiving section of the through channel decreases towards the output section. This allows air flowing into the receiving section through at least one air intake opening to be accelerated.

[0016] Advantageously, the output section is directly connected to the minimum flow cross-section of the receiving section in the direction of liquid flow. Therefore, the minimum flow cross-section of the receiving section forms a throttling point in the through-channel, to which the output section, extending in the beam plane, is directly connected. This enhances the intake of air into the receiving channel.

[0017] In order to keep the flow loss of the intake air particularly small and advantageous, the output section is tangentially and continuously connected to the receiving section.

[0018] In a preferred embodiment of the invention, the minimum flow cross-section of the receiving section is arranged to be 3 mm to 70 mm, particularly 20 mm to 40 mm, for example 29 mm, from the nozzle discharge opening of the flat beam nozzle.

[0019] Advantageously, the height of the output section perpendicular to the beam plane is 1 mm to 6 mm. It has been confirmed that the liquid beam, which spreads in a fan shape in the beam plane, is therefore subjected to only minor effects perpendicular to the beam plane.

[0020] The height of the output section perpendicular to the beam plane can be constant along the entire length of the output section. Alternatively, it can be specified that the height of the output section perpendicular to the beam plane decreases, at least in the longitudinal region, as it approaches the exit opening of the air-enveloping component. For example, it can be specified that the output section has a height of 6 mm in its input region, which decreases to 1 mm until it reaches the exit opening of the air-enveloping component.

[0021] The width of the escaping opening of the air-enclosed component is advantageously 60 mm to 120 mm in the beam plane.

[0022] In a preferred design of the output device according to the invention, the flat beam nozzle is designed to output a liquid beam that extends in a fan shape at a beam angle of 20° to 30°, particularly at a beam angle of 23° to 27°, for example, 25°. Attached Figure Description

[0023] The following description of advantageous embodiments of the invention, taken in conjunction with the accompanying drawings, provides a detailed explanation. Wherein: Figure 1 A perspective view is shown of an output device for outputting a liquid beam that is surrounded by an airflow sleeve and extends in a fan shape in the beam plane. The output device has a beam generating component and an air-enveloping component. Figure 2 Shown from the diagonal front Figure 1 A perspective view of the air envelope component of the output device; Figure 3 It shows Figure 1 A perspective cross-sectional view of the air-enclosed component of the output device; Figure 4 It shows Figure 1 A partial cross-sectional view of the output device in the beam plane of the liquid beam; Figure 5A graphical illustration shows the distance between the exhaust opening of the air-encapsulated component and the nozzle discharge opening of the flat beam nozzle of the beam generating component, which is required to achieve a preset percentage increase in cleaning width. Detailed Implementation

[0024] An advantageous embodiment of the output device according to the invention for outputting a liquid beam that is surrounded by an airflow sleeve and extends in a fan shape in the beam plane is described below. Figures 1 to 4 The output device 10 is illustrated by way of example and is generally indicated by reference numeral 10. It has a beam generating component 12 and an air-enveloping component 14, which can be pluggably connected to and interlocked with each other in a preset rotational position. The beam generating component 12 generates a liquid beam 18 that fan-shaped in a beam plane 16, which is enveloped by a sleeve-shaped airflow via the air-enveloping component 14. The beam plane 16 and the liquid beam 18 are in... Figure 3 It is shown in the middle with a dotted line.

[0025] As from Figure 1 and Figure 4 As can be seen, the beam generating component 12 has a beam tube 20 with a first end region 22 and a second end region 24. A connecting element 26 is arranged on the first end region 22, by means of which the beam generating component 12 can be releasably connected to a liquid input component known per se and therefore not shown in the drawings for better overview. In the illustrated embodiment, the connecting element 26 is designed as a bayonet connector 28. For example, a spray gun can be used as the liquid input component, which is in flow connection with a high-pressure cleaning device via a pressure hose.

[0026] A flat beam nozzle 30 is arranged anti-rotatingly at the second end region 24 of the beam tube 20, and is form-locked into the beam tube 20. Pressurized liquid, particularly a cleaning liquid, can be supplied to the beam generating component 12 via a liquid input component (not shown in the figures). The liquid can be output via the flat beam nozzle 30 in the form of a liquid beam 18 fanning out in the beam plane 16. Such a flat beam nozzle is known to those skilled in the art, for example, from WO 2014 / 090333 A1.

[0027] The beam tube 20 is surrounded by a housing sleeve 32, which is formed by two threaded half-shells connected to each other, and has a receiving portion formed on its front side 38 facing the air-enveloping component 14, into which the end section of the air-enveloping component 14 facing the beam-generating component 12 can be inserted. This end section is designed in the form of a sleeve 40 and has two oppositely positioned hooks 42, 44 on its outer side, which allow the beam-generating component 12 and the air-enveloping component 14 to be locked in a releasable manner. This will be explained in more detail later.

[0028] The air-encapsulating component 14 has a housing 46 connected to the sleeve 40 in a direction opposite to the beam-generating component 12, and has a top wall 48, a bottom wall 50, an end wall 52 opposite to the beam-generating component 12, a rear wall 54 facing the beam-generating component 12, and two opposing, elastically deformable side walls 56 and 68. The side walls 56 and 58 are arranged between the top wall 48 and the bottom wall 50, and extend from the end wall 52 to the rear wall 54, respectively. Hooks 42 or 44 are individually connected to the side walls 56 and 58 in the direction of the beam-generating component 12, wherein the hooks 42 and 44 pass through the rear wall 54. The sleeve 40 is formed onto the rear wall 54. The housing 46 of the air-encapsulating component 14 surrounds a through channel 60 extending from the free end 62 of the sleeve 40 to an exit opening 64 of the air-encapsulating component 14. The exit opening 64 is arranged on the end wall 52 of the housing 46.

[0029] Especially from Figure 3 and Figure 4 As can be seen, the through channel 60 has a receiving section 66 that receives the liquid jet 18 provided by the flat jet nozzle 30 and connects to an output section in the flow direction of the liquid jet 18. The output section extends to an exit opening 64 and continuously expands within the jet plane 16 defined by the liquid jet 18 as it gets closer to the exit opening 64. The expansion of the output section 68 ensures that the liquid jet 18 provided by the flat jet nozzle 30 is not affected by the through channel 60; instead, the liquid jet 18 maintains a substantially constant distance from the wall of the through channel 60 along the entire length of the output section 68.

[0030] At the height of the accommodating section 66, the side walls 56 and 58 of the housing 46 have air intake openings 70 and 72, respectively, which are connected to air intake channels 74 and 76 pointing into the housing 46.

[0031] Inside the containment section 66, a negative pressure is formed under the action of the liquid jet 18, thereby drawing air into the containment section 66 through the air intake openings 70, 72 and the connected air intake channels 74, 76. The air surrounds the liquid jet 18 in the peripheral direction in the form of an air sleeve, and is output together with the liquid jet 18 through the exhaust opening 64.

[0032] Therefore, the liquid jet output by the output device 10 is surrounded by an airflow sleeve, which reduces the interaction between the liquid jet 18 and the surrounding air, thereby reducing the deceleration of the liquid jet 18 and making the compactness of the liquid jet 18 less affected by the surrounding air.

[0033] The output section 68 and the receiving section 66 are directly fronted at the end region of the output section 68 by a tube 78, which is surrounded by a housing 46 and held on the top wall 48 and bottom wall 50 of the housing 46 by means of a retainer 80.

[0034] The side walls 56 and 58 of the housing 46 extend from the end wall 52 to the rear wall 54. At a small distance from the end wall 52, the side walls 56 and 58 each have a first retaining rib 82, which is shape-locked through a complementary retaining groove 84 in the top wall 58. Furthermore, at a small distance from the end wall 52, the side walls 56 and 58 each have a second retaining rib (not shown in the figures for better overview), which is shape-locked through a complementary retaining groove in the bottom wall 50.

[0035] The air intake openings 70 and 72 on the sidewalls 56 and 58 are respectively connected to one of the aforementioned latches 42 or 44 in the direction of the beam generating component 12. Hooks 42 and 44 respectively engage from the rear with locking protrusions 86 and 88 located inside the half-shells 34 and 36 of the housing sleeve 32 of the beam generating component 12, thereby allowing the air-encasing component 14 to lock with the beam generating component 12. To release the locking connection and separate the air-encasing component 14 from the beam generating component 12 when needed, the latches 42 and 44 each have release elements 90 and 92 in the sidewall regions connected to the air intake openings 70 and 72 in the direction of the end wall 52. These release elements are designed in the form of material thickenings on the respective sidewalls 56 and 58 and protrude outwards from the respective sidewalls 56 and 58. This is, for example, from... Figure 4 It can be seen.

[0036] As already mentioned, the air-encapsulating component 14 can be plugged into the beam generating component 12 and can be locked in a releasable manner. To establish a plugged connection, the sleeve 40 of the air-encapsulating component 14 can be inserted into the housing sleeve 32 of the beam generating component 12 and locked with the housing sleeve 32 by means of locking protrusions 86, 88. When the sleeve 40 is inserted into the housing sleeve 32, the hooks 42, 44 automatically occupy their locking positions, in which the hooks engage with their respective locking protrusions 86, 88 from the rear. If the user wants to separate the air-encapsulating component 14 from the beam generating component 12 again, he only needs to press the release elements 90, 92 against each other. This causes the sidewalls 56, 58 to move into the release position, and the hooks 42, 44 are also moved into the release position by means of these sidewalls, in which they release their respective locking protrusions 86, 88.

[0037] As already mentioned, the output section 68 expands within the beam plane 16 of the liquid jet 18 as it approaches the exit opening 64. The output section 68 has an opening angle α of 25°. The flat jet nozzle 30 has a nozzle profile and a nozzle discharge opening designed such that the liquid forms a fan-shaped beam pattern as it exits the flat jet nozzle 30, wherein, in the exemplary embodiment shown, the beam angle β is also 25°.

[0038] As from Figure 3 and Figure 4 As can be seen, the flow cross-section of the receiving section 66, which is directly preceding the end region of the output section 68, continuously decreases in the direction of the output section 68. In the illustrated embodiment, the minimum flow cross-section of the receiving section 66 is arranged at a distance a of 29 mm. The minimum flow cross-section of the receiving section 66 is tangentially and continuously connected to the output section 68.

[0039] The output device 10 is designed to output a liquid with a pressure of 70 bar to 250 bar, wherein the volumetric flow rate of the liquid is approximately 300 l / h to approximately 1800 l / h. The height of the output section 68 perpendicular to the beam plane 16 is approximately 6 mm in the region directly connected to the receiving section 66, and decreases to approximately 2 mm in the end region directly preceding the output section 68 at the exit opening 64.

[0040] In the illustrated embodiment, the escaping opening 64 has a width of 80 mm in the beam plane 16, wherein, in the illustrated embodiment, the escaping opening of the air-encapsulating component 14 and the nozzle discharge opening of the flat beam nozzle 30 are arranged at a distance A of 17 cm.

[0041] A fan-shaped liquid jet 18 can be directed at a surface to clean it. If the liquid jet 18 is perpendicular to the surface to be cleaned and moves smoothly relative to the surface perpendicular to the jet plane, a striped surface area is formed, which is cleaned with a certain cleaning intensity, and the width of this surface area is currently referred to as the cleaning width. The cleaning width is increased by using the air-envelope component 14 compared to the cleaning width achievable with the same cleaning intensity using only the flat jet nozzle 30 without the air-envelope component 14. It has been identified that there is a specific linear relationship between the percentage increase in the preset cleaning width and the distance A required for that increase between the exhaust opening 64 of the air-envelope component 14 and the nozzle discharge opening of the flat jet nozzle 30. That is, the distance A (measured in centimeters) required for the desired percentage increase in cleaning width between the exhaust opening 64 of the air-envelope component 14 and the nozzle discharge opening of the flat jet nozzle 30 is at least 0.16 times the desired percentage increase in cleaning width plus a fixed value of 9 cm.

[0042] To verify the aforementioned linear relationship between the percentage increase in cleaning width and the distance required for that increase, measurements were performed using multiple output devices, which differed from output device 10 described above only in the distance A, specifically, between 12.8 cm and 21.3 cm, depending on the output device. For the measurements, white plastic sheets made of extruded polystyrene were coated with black disperse dye. After the disperse dye had hardened, in a first step, using only a flat beam nozzle 30 without the air-encasing component 14, a fan-shaped liquid jet was directed vertically upwards towards the surface of the disperse dye-coated plastic sheet, wherein the plastic sheet moved perpendicularly to the beam plane 16 at a constant speed of 10 cm / s, creating striped surface areas on the plastic sheet where the disperse dye was partially removed. The distance between the nozzle outlet of the flat beam nozzle 30 and the plastic sheet was set such that approximately 50% of the disperse dye was removed. This was the case at a distance of 13.5 cm. This removal resulted in the plastic sheet becoming brighter in the form of a specific grayscale value, indicating how bright the surface stripes appeared to the human eye. The width of the brightened surface area represents the cleaning width achievable with the flat beam nozzle 30 without the use of the air-envelope component 14, at a cleaning intensity corresponding to the detected brightening (grayscale value) of the surface area. Brightening thus defines the degree of cleaning intensity achieved.

[0043] In a further step, output devices, differing only from each other at distance A, are then sequentially positioned above a plastic plate coated with disperse dye. Liquid jets 18, fanning out from their respective output devices in the beam plane 16, are directed vertically upwards towards the plastic plate, which moves relative to the output devices at a constant speed of 10 cm / s perpendicular to the beam plane 16. By applying the liquid jets 18, striped, brightened surface areas are created on the plastic plate. For each output device, the distance between its outlet opening and the plastic plate is individually set such that the same brightening and, consequently, the same cleaning intensity is produced as when using the flat beam nozzle 30 without the air-enveloping component 14; that is, the striped surface areas thus have the same grayscale value as when using the flat beam nozzle 30 without the air-enveloping component 14. This is the case at distances between 1.5 cm and 3.3 cm, depending on the output device. Therefore, the same cleaning intensity exists when measuring with different output devices as when measuring using only the flat beam nozzle 30 without the air-enveloping component 14. The pressure of the liquid supplied to the beam generating component 12 was 126 bar in all measurements, and the volumetric flow rate of the liquid was 490 l / h. The cleaning width achieved using each output device was measured separately and compared with the cleaning width achievable at the same cleaning intensity using the flat beam nozzle 30 without the air-enclosed component 14. The measurement results are presented in... Figure 5 The figure is illustrated graphically. It shows the relationship between the measured distance A of the respective output devices—namely, the distance between the exit opening 64 of the air-envelope component 14 and the nozzle discharge opening of the flat-beam nozzle 30—and the percentage increase in cleaning width achieved by the output devices, relative to the cleaning width achieved using the flat-beam nozzle 30 without the air-envelope component 14 at the same cleaning intensity. As can be seen from the figure, the distance between the exit opening 64 of the air-envelope component 14 and the nozzle discharge opening of the flat-beam nozzle 30 required for the percentage increase in the predetermined cleaning width is at least 0.16 times the percentage increase in the predetermined cleaning width plus a fixed value of 9 cm. To achieve the predetermined percentage increase in cleaning width—compared to the cleaning width achievable using the flat-beam nozzle 30 without the air-envelope component 14 at the same cleaning intensity—by means of the output device 10 according to the invention, it is only necessary to design the output device 10 such that the distance A between the exit opening 64 of the air-envelope component 14 and the nozzle discharge opening of the flat-beam nozzle 30 satisfies the above condition. This applies at least to increases in cleaning width ranging from 20% to 75%.

Claims

1. An output device for outputting a liquid beam (18) that is surrounded by an airflow sleeve and extends in a fan shape in a beam plane (16), wherein, The output device (10) includes a beam generating component (12) having a flat beam nozzle (30) for generating a liquid beam (18) and an air-enveiling component (14) for enveloping the liquid beam (18) with an airflow. The air-enveiling component (14) has a through channel (60) having a receiving section (66) for receiving the liquid beam (18) and an output section (68) for outputting the liquid beam (18) and the airflow enveloping the liquid beam. (66) is in flow connection with at least one air intake opening (70, 72) of the output device (10), and the output section (68) extends to the exit opening (64) and fans out in the beam plane (16), characterized in that the distance (A) between the exit opening (64) of the air envelope component (14) and the nozzle discharge opening of the flat beam nozzle (30) is measured in centimeters and is at least 0.16 times the percentage increase of a preset cleaning width plus a fixed value of 9 cm, wherein the percentage increase of the cleaning width refers to the percentage increase related to the cleaning width that can be achieved at the same cleaning intensity using the flat beam nozzle (30) without using the air envelope component (14).

2. The output device according to claim 1, characterized in that, The percentage increase of the preset cleaning width is 20% to 75%.

3. The output device according to claim 1 or 2, characterized in that, The distance (A) between the vent opening (64) of the air-envelope component (14) and the nozzle discharge opening of the flat beam nozzle (30) is measured in centimeters and is at most 0.16 times the percentage increase of the preset cleaning width plus an additional fixed value, which is at most 13.5 cm, and especially 11 cm.

4. The output device according to any one of the preceding claims, characterized in that, The output section (66) that extends in a fan shape in the beam plane (16) has an opening angle of 20° to 30° in the beam plane (16).

5. The output device according to claim 4, characterized in that, The output section (68) has an opening angle of 25° in the beam plane (16).

6. The output device according to any one of the preceding claims, characterized in that, The output device (10) is designed to output liquid with a pressure of 10 bar to 300 bar.

7. The output device according to any one of the preceding claims, characterized in that, The output device is designed to output liquid with a volumetric flow rate of 300 l / h to 3000 l / h.

8. The output device according to any one of the preceding claims, characterized in that, The flow cross-section of the receiving section (66) decreases toward the output section (68).

9. The output device according to claim 8, characterized in that, The output section (68) is directly connected to the minimum flow cross section of the receiving section (66) in the direction of liquid flow.

10. The output device according to claim 9, characterized in that, The output section (68) is tangentially and continuously connected to the receiving section (66).

11. The output device according to claim 9 or 10, characterized in that, The minimum flow cross section of the receiving section (66) is arranged to be 3 mm to 70 mm away from the nozzle discharge opening of the flat beam nozzle (30).

12. The output device according to any one of the preceding claims, characterized in that, The height of the output section (68) perpendicular to the beam plane (16) is 1 mm to 6 mm.

13. The output device according to any one of the preceding claims, characterized in that, The height of the output section (68) perpendicular to the beam plane (16) is constant over the entire length of the output section (68), or at least decreases in the longitudinal region of the output section (68) as it gets closer to the exit opening (64) of the air-envelope component (14).

14. The output device according to any one of the preceding claims, characterized in that, The width (B) of the escaping opening (64) of the air-encased component (14) is 60 mm to 120 mm in the beam plane (16).

15. The output device according to any one of the preceding claims, characterized in that, The flat beam nozzle (30) is designed to output a fan-shaped liquid beam at a beam angle of 20° to 30°.

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