JP2016214875A - Hard floor nozzle for receiving coarse and fine dust - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction nozzle which is capable of easily receiving dirt and/or dust of different particle sizes and is characterized in particular by excellent performance of receiving coarse dust.SOLUTION: Provided is a suction nozzle for a vacuum cleaner for sucking up dirt and/or dust from a floor by means of a suction air flow, comprising: a housing (1); a suction chamber (3) formed inside the housing (1); a suction channel (4) connecting to the suction chamber (3) and guiding the suction air flow; and a suction mouth (5) formed as an opening in a floor side of the suction chamber (3). The suction mouth (5) has a central suction mouth section (6) and two lateral suction mouth sections (7) flanking the central suction mouth section (6). The central suction mouth section (6) is enlarged in width from the suction channel (4) to the front side of the suction nozzle, and the height of the central suction mouth section (6) is reduced from the suction channel (4) to the front side of the suction nozzle with an angle of 6° or more and 10° or less.SELECTED DRAWING: Figure 1

Description

  The present invention uses a suction airflow having a housing, a suction chamber formed in the housing, a suction pipe for guiding the suction airflow connected to the suction chamber, and a suction port formed as a floor side opening of the suction chamber. The present invention relates to a suction nozzle for a vacuum cleaner that sucks dirt and / or dust from the floor.

  Suction nozzles that are also installation tools, abbreviated as nozzles, or referred to as hard floor nozzles or carpet nozzles in relation to their intended use, are known in the field and usually clean up to suck dirt and / or dust from the floor Used with the machine. A vacuum cleaner having such a suction nozzle has a basic body in which a suction fan motor for generating a suction airflow that is electrically driven during normal operation is disposed. The suction nozzle is typically hermetically connected to the vacuum cleaner via a flexible suction hose and / or operating tube. In the case of a suction robot, the suction nozzle is generally integrated into the basic body itself. The suction nozzle is provided with several layers of brush hairs or the like for removing dirt and / or dust from the floor. The dust and / or dirt thus removed from the floor is attracted to the suction airflow and is mostly isolated in a dust filter bag in a dust collection chamber located in the basic body.

  Dirt or dust to be removed from the floor is classified into coarse dust and fine dust, respectively, depending on the size of the particles. From the prior art, suction nozzles optimized on the one hand for accommodating coarse dust are known, while other suction nozzles are also designed to accommodate fine dust particularly well. For example, many of the hard floor nozzles are not formed for the intake of coarse dust, while there are additional intake nozzles that can be manually switched between the inclusion of coarse and fine dust with a foot switch. By operating the foot switch, a row of brush bristles extends from the suction nozzle, which increases the spacing of the suction nozzle to the floor so that coarse dust can be better accommodated or sucked. Eventually, however, the suction nozzles known from the prior art compete and so far meet only one of the competing requirements, i.e. provide accommodation for either coarse or fine dust, or use The user must manually switch between different operating modes.

  An object of the present invention starting from that is to provide a suction nozzle that can be used freely for accommodating dirt and / or dust of different particle sizes, and is particularly excellent for accommodating particularly good coarse dust. In particular, the suction nozzle should therefore be able to accommodate both coarse and fine dust without having to manually switch the operation mode of the suction nozzle. It is therefore desirable for such a suction nozzle to be characterized by a slight thrust and / or a slight noise emission.

  The object of the invention is solved according to the invention by the features of the independent claims. Other preferred forms according to the invention can be taken from the dependent claims.

  According to it, it has a suction port formed as a housing, a suction chamber formed in the housing, a suction pipe for guiding a suction air flow connected to the suction chamber, and a floor side opening of the suction chamber. It has a central suction port part and two side suction port parts on the side of the central suction port part. The central suction port part expands from the suction pipe toward the front of the suction nozzle. , Using the suction airflow to remove dirt and / or dust from the floor, formed such that the height of the central suction port portion is reduced at an angle of ≧ 6 ° and ≦ 10 ° from the suction pipe toward the front surface of the suction nozzle The problem is solved by a suction nozzle for a vacuum cleaner.

  The essential point of the present invention is that the suction port is divided into a central suction port part and two side suction port parts, and the separated region is particularly for accommodating fine dust by the side suction port part. And in particular for the storage of coarse dust by the central inlet part. Proposal of a central suction port portion having a width that expands from the suction pipe toward the front surface of the suction nozzle, for example, a V-shaped form in a top view, and a height that decreases at an angle of ≧ 6 ° and ≦ 10 ° By virtue of the configuration, the coarse dust is advantageously shifted so that it is additionally fed mechanically in the air flow direction to the suction pipe as well. In addition to such a “funnel effect”, the central suction port portion, due to its reduced height as a flow diffuser, achieves substantially better coarse dust containment compared to the known forms from the prior art. Works. The suction airflow that has flowed in through the side suction port portion and the central suction port portion merges in the region of the suction pipe, from which the suction airflow is discharged from the suction nozzle together with dirt or dust sucked up from the floor, for example, by a pipe joint. The terminology chosen here for the description of the component arrangement of the suction nozzle is that in which the suction nozzle is placed on the floor and moves over it, how it works during the suction operation on the floor, It is used on the premise of the position and orientation of the suction nozzle.

  According to a preferred development of the suction nozzle, the width of the central suction port is increased linearly, stepwise and / or curved and the height of the central suction port is reduced linearly, stepwise and / or curved And / or a reduction in height of 8 ° is contemplated. A combination of heights that linearly shrink at an angle of 8 ° has proven particularly advantageous.

  According to another preferred development, the suction nozzle has a suction air flow shut-off means, which is arranged in the central suction port portion in the suction air flow direction between the front surface of the suction nozzle and the suction pipe. According to a further preferred development, a forward airflow sealing means is provided, which is implemented and arranged to at least partly define the central inlet part at the front face of the inlet nozzle. In particular, in the open configuration of the central suction port portion, the noise emission reduction of the suction nozzle is achieved by the installation of the sound blocking means and / or the forward air flow sealing means. Preferably, the configuration and / or dimensions of the sound blocking means and / or the forward airflow sealing means are such that the suction nozzle is an Eco Design Directive (EU) No. The sound volume generated by the suction air flow during the suction operation of the floor nozzle is set so as not to exceed 80 dB (A).

  Similarly, in a preferred development, the front airflow sealing means is formed in two parts and the sound blocking means is arranged between the two parts along the front face of the suction nozzle. For example, the sound blocking means is formed by two rows of brush hairs extending about 5 cm long, which are arranged in the housing offset from each other by an angle of about 30 °. The sound blocking means in the direction of extension perpendicular to the forward stroke is preferably reduced by directing the sound emission from the suction pipe towards the front, preferably by means of one part of each of the front air flow sealing means on both sides. So as to be surrounded.

  According to a particularly preferred development, the side inlet parts are respectively connected to the inner and outer side airflow sealing means extending from the inlet pipe to the side of the inlet nozzle, so that the central inlet part is on the inner side of the respective side inlet part. It is defined by the airflow sealing means. The inner and outer airflow sealing means are basically optionally formed to seal the suction airflow, but preferably the side airflow sealing means are arranged in a row of bristles, one or multiple rows of tufts, sealing lips And / or combinations thereof. Furthermore, the lateral airflow sealing means can be formed at least in part by a housing, for example a projection or wall projecting in the floor direction from the housing. More preferably, the inner and outer side airflow sealing means extend approximately parallel or substantially parallel to each other between the sides of the suction pipe and the suction nozzle.

  Preferably, the cross section of the side suction port part (intake pipe) has a discharge port with a width ≦ 60 mm, ≦ 50 mm, ≦ 40 mm, ≦ 35 mm, 33 mm, ≧ 30 mm or ≧ 20 mm in the region of the suction tube, The height is preferably ≦ 50 mm, ≦ 40 mm, ≦ 30 mm, 22 mm, ≧ 20 mm or ≧ 10 mm. On the side of the base surface of the housing, the width of the suction port of the side intake pipe is preferably ≦ 50 mm, ≦ 40 mm, ≦ 35 mm, 25 mm, ≧ 20 mm or ≧ 10 mm, and the height of the suction port is preferably ≦ 20 mm, ≦ 10 mm, 7.6 mm, ≧ 5 mm, or ≧ 2 mm. The smaller the width and / or height, the better the suction effect is achieved. More preferably, an air passage is formed in the suction pipe between the two side inlet portions, through which portions ≧ 40% and ≦ 65% of the suction air flow flow through the central inlet portion. The opening width of the air passage is preferably 25 mm, 30 mm, 32 mm, 37 mm, 40 mm or 45 mm. The width of the central suction portion on the front surface of the suction nozzle is preferably the same as or substantially the same as the width of the suction nozzle. In this distribution of the suction air flow between the central inlet part and the side inlet parts, particularly good containment of both fine and coarse dust is achieved.

  More preferably, the side suction port portion (intake pipe) extends away from the suction tube substantially linearly toward the base surface or the side surface of the suction chamber, and the suction port portion (intake pipe) is bent and / or curved. It is also possible to extend away from the suction pipe toward the side of the foundation surface. The brush bristles or seal lips preferably extend in the direction of the floor away from the housing vertically and are flexible so that when the suction nozzle moves in the normal direction of movement, it is on the floor under the bristles or seal lips. Coarse dust or fine dust can reach the central inlet part and / or the side inlet part through them. The two inner airflow sealing means preferably define a suction airflow path between the suction pipe and the central inlet portion.

  In a further preferred embodiment, the front airflow sealing means is pivotably formed into the suction chamber, and the front airflow sealing means can be swung completely into the suction chamber without touching the inner side airflow sealing means. It is contemplated to have some dimension. In this way, after the passage of coarse dust, it is ensured that the forward air flow sealing means can return to the starting position where it does not turn without obstruction.

  In yet another preferred embodiment, the front airflow sealing means has a shape like a rectangle, and the front airflow sealing means extends from the housing to the floor in the case of a suction nozzle placed on the floor, of the side airflow sealing means. One and / or rounded on the opposite side of the housing, the forward airflow sealing means has a region extending from the first housing to the floor and a second region connected thereto, the second region being the first region In the case of a suction nozzle placed on the floor, the forward airflow sealing means extends towards the suction chamber and is said to be bent (being bent) In a sense) bends. Preferably, when the forward airflow sealing means does not turn and the angle in the forward stroke direction, even if coarse dust outside the central suction port portion does not have a predetermined suction airflow, only by the movement of the suction nozzle in the forward stroke direction. This is done so that it can be transferred into the central inlet part. More preferably, the front airflow sealing means is formed such that one gap is formed between the front airflow sealing means and the two inner side airflow sealing means. The gap preferably extends at least 50 mm.

  There are basically various possibilities for the form of the sound blocking means. However, it is particularly preferred that the sound blocking means is V-shaped or partially circular, has an open shape towards the back side of the suction nozzle, and / or the sound blocking means is made of synthetic resin and / or 1 As long as two forward airflow sealing means are provided, it is made of a material that is harder than the forward airflow sealing means. According to a further preferred embodiment, the front airflow sealing means is formed as a plurality of suction airflow sound blocking means, the suction airflow sound blocking means being arranged along the front surface of the housing. In a further preferred embodiment, the forward air flow sealing means is arranged between the suction pipe and the front face of the housing, away from the front face, or arranged on the front face of the edge of the housing and / or extends parallel to the front face.

  In a preferred development, the suction port and / or the central suction port part has a shape like an isosceles triangle, preferably the suction pipe is connected to the suction chamber in the apex region between the sides of the triangle, The central suction port extends from the suction tube to the base of the isosceles triangle, and the side suction ports extend from the suction tube to the corners of the isosceles triangle located on the opposite side of the apex along each side of the isosceles triangle. It is formed as follows. The coarse dust region of the forward stroke of the suction nozzle formed by the central suction port portion according to the proposed form is arranged substantially before the fine dust region formed by the side suction port portion, and is then an isosceles triangle The side inlet portion at the corner located on the opposite side of the apex defines the central inlet portion. In this way, fine dust storage is advantageously possible at least up to the corner area of the suction nozzle and the front face of the suction nozzle.

  According to a further preferred form, the angle α between the longitudinal extension directions of the two side suction port portions is 45 ° ≦ 30, so that the two side suction port portions are each separated from the suction pipe to the side surface of one suction nozzle. α ≦ 160 °, preferably 90 ° ≦ α ≦ 135 °, particularly preferably α so that α is approximately equal to 135 °, or the two side inlet portions curve away from each other from the suction pipe It extends like so. If the two side suction port portions extend between the suction pipe and the side surface of the suction nozzle linearly or almost linearly, for example along the side of the suction port formed like an isosceles triangle, the central suction port The part preferably has a triangle, such as an isosceles triangle, whose base is directed towards the front of the suction nozzle.

  According to a preferred development, the suction port has a further central suction port part and two further lateral suction port parts to the side of the further central suction port part, the central suction port part and the further central suction port part being a suction pipe In the opposite direction away from the two side inlet portions and two further side inlet portions extend to form an X-shaped arrangement. The suction nozzle formed in this way can accommodate coarse dust in both the forward and return strokes. The suction nozzle is preferably configured symmetrically in the forward and return strokes, in particular mirror-symmetric. More preferably, the suction tube forms the center of this form, the central suction port part with two lateral suction port parts away from it, and in particular the further central suction port part with further lateral suctions facing mirror symmetry Extends with mouth part. In such a configuration, instead of manually rotating the suction nozzle known from the prior art by 180 °, the user simply moves the suction nozzle back and forth to accommodate coarse dust in the forward and return strokes.

1 shows a suction nozzle according to a preferred embodiment of the invention in a bottom view of the suction nozzle. FIG. 2 shows a perspective view of the suction nozzle of FIG. 1.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings.

  1 and 2 show a schematic bottom view of a suction nozzle, also called a floor nozzle, according to a preferred embodiment of the present invention. The suction nozzle has a housing 1 made of synthetic resin, and a bottom plate 2 is formed on the floor side. A suction chamber 3 is formed under the bottom plate 2, and a suction pipe 4 is connected to it, which forms a suction port 5 as an opening on the floor side. As can be seen in FIG. 1, the bottom plate 2 and the suction port 5 have a shape like an isosceles triangle, and the bottom side 6a forms the front surface of the suction nozzle in the forward travel direction.

  The suction pipe 4 is airtightly connected to a pipe joint (not shown) provided on the upper surface of the housing 1. An operating pipe and / or a flexible hose are airtightly connected to the basic body of the vacuum cleaner at the pipe joint, and a suction fan motor for generating an electrically driven suction airflow is disposed therein. It is possible to isolate dirt and / or dust that has been evacuated from the floor to be cleaned in a dust collection chamber arranged in the basic body by a suction air flow into the dust filter bag.

  The suction port 5 has a central suction port portion 6 and two side suction port portions 7 that are located on or around the side of the central suction port portion 6. The side suction port portions 7 extend linearly from the suction pipe 4 toward the corners 7 a of isosceles triangles, respectively, and the angle α is 135 ° between the longitudinal extension directions of the two side suction port portions 7. The side inlet portion 7 is defined by inner and outer side airflow sealing means 8 in terms of airflow technology. The outer side airflow sealing means 8 extends from each corner 7a of the isosceles triangle along each side and fuses in a partial circle between two sides partially defining the suction pipe 4.

  Correspondingly, the entire back surface of the suction nozzle is defined by an outer lateral airflow sealing means 8 which is here formed as a row of bristles. The inner side airflow seal means 8 is in parallel with the outer side airflow seal means 8 away from the suction pipe 4 in the direction of the corner 7a, and the suction pipe between the two inner side airflow seal means 8 4 extends to form an air passage 9 for the suction airflow. The air passage 9 here has a width of about 32 mm, while the two side inlet portions 7 each have a width of about 33 mm in the region of the suction pipe 4. With the above dimensions, it is achieved that about 45% of the suction airflow flows from the suction pipe 4 through the central inlet portion 6 while the remaining about 55% is evenly distributed to the two side inlet portions 7. .

  Like the suction port 5 and the bottom plate 2, the central suction port portion 6 has a shape like an isosceles triangle, and two inner side airflow sealing means 8 define the sides of the central suction port portion 6 in an airtight manner. . As already mentioned, the air passage 9 is arranged at the apex of the central suction port portion 6 toward the suction pipe 4, while facing the base 6a and uniting with the front surface of the suction nozzle, the front airflow sealing means 11 is the central suction port. It is provided for sealing at least part of the part 6.

  The central suction port portion 6 is expanded in a funnel or V-shape on the one hand in the width thereof straight from the suction pipe 4 toward the bottom 6a or the front surface of the suction nozzle, and on the other hand, the height of the central suction port portion 6 is the suction height. The tube 4 is linearly reduced at an angle of about 8 ° toward the base 6a or the front surface of the suction nozzle. Since the central suction port portion 6 thus serves as a kind of flow diffuser, the dust can be accommodated particularly well by the central suction port portion 6 thus formed.

  The front airflow sealing means 11 is formed as a flexible sealing lip so that coarse dust can pass through the sealing lip. Coarse dust that reaches the central suction port portion 6 is captured by the suction airflow and sucked through the suction pipe 4. The front airflow sealing means 11 reaches from the bottom plate 2 to the floor, and a gap of about 50 mm is formed on the side between the front airflow sealing means 11 and the corner 7a of the suction nozzle. Thus, the forward air flow sealing means 11 formed as a seal lip can be swung without touching the inner side air flow sealing means 8 when the coarse dust is transferred into the suction chamber 3.

  While the generation of noise emission already caused by the suction airflow is reduced by the forward airflow sealing means 11, a sound blocking means 12 is provided for further reduction of noise emission, which is integrated with the housing 1 in FIGS. It is formed as a shaped V-shaped frame edge, which is directed from the bottom plate 2 to the floor without touching the floor. The sound blocking means 12 formed in this way is disposed in the central suction port portion 6 in the suction airflow direction between the bottom 6a forming the front surface of the suction nozzle and the suction pipe 4. In alternative embodiments not shown, the sound blocking means 12 can also be arranged in front of the central suction port portion 6 or in front of the suction nozzle between the front air flow sealing means 11 portions. Similarly, the front air flow sealing means 11 may be formed by a plurality of sound blocking means 12, which are arranged in front of and behind the central suction port portion 6 across the forward travel direction.

  The distance between the front airflow sealing means 11 and the sound blocking means 12 is about 15 mm, while the distance between the sound blocking means 12 and the inner side airflow sealing means 8 is about 22 mm. Alternatively, the sound blocking means 12 can also be implemented by two rows of brush hairs extending about 5 cm long, which are offset from each other by an angle of about 30 ° from the suction pipe 4 to the front of the suction nozzle. It is arranged on the bottom plate 2 so that direct sound emission is limited at least.

  As in the embodiments known from the prior art, the proposed configuration of the central inlet portion with a width that expands from the suction pipe towards the front of the suction nozzle and a height that decreases at an angle of ≧ 6 ° and ≦ 10 °. Therefore, it is possible to efficiently inhale both fine dust and coarse dust without the need for manual switching between fine dust and coarse dust. Due to the experimentally confirmed dimensions of the side inlet portion 7, even higher airflow velocities and thereby high volumetric flow rates are achieved, which further provides very good and efficient fine dust containment. Since the suction port 5 has a surface to which a relatively small negative pressure is applied, the aforementioned embodiment is characterized by a slight thrust. On the other hand, the central suction port portion 6 is formed open to it, so that the suction nozzle here provides a very efficient coarse dust containment and is only slightly affected by the sound blocking means 12 and the forward air flow sealing means 11. Only noise emissions are recorded.

1 Housing 2 Bottom Plate 3 Suction Chamber 4 Suction Pipe 5 Suction Port 6 Central Suction Port Portion 6a Bottom Side 7 Side Suction Port Portion 7a Square 8 Airflow Sealing Means 9 Air Passage 11 Front Airflow Sealing Means 12 Sound Blocking Means

Claims (15)

A housing (1), a suction chamber (3) formed in the housing (1), a suction pipe (4) for guiding a suction air flow connected to the suction chamber (3), and a floor of the suction chamber (3) A suction nozzle for a vacuum cleaner that sucks dirt and / or dust from the floor using a suction airflow having a suction port (5) formed as a side opening,
The inlet (5) has a central inlet part (6) and two side inlet parts (7) on the sides of the central inlet part (6);
The central suction port portion (6) is such that the width of the central suction port portion (6) increases from the suction pipe (4) toward the front surface of the suction nozzle, and the height of the central suction port portion (6). Is a suction nozzle formed so as to be reduced at an angle of ≧ 6 ° and ≦ 10 ° from the suction pipe (4) toward the front surface of the suction nozzle.   The width of the central suction port portion (6) is increased linearly, stepwise and / or curved, and the height of the central suction port portion (6) is reduced linearly, stepwise and / or curved. The suction nozzle according to claim 1, wherein the height is reduced at an angle of 8 °.   The sound blocking means (12) for suction airflow disposed in the central suction port portion (6) in the suction airflow direction between the front surface of the suction nozzle and the suction pipe (4). The suction nozzle described in 1.   4. A front airflow sealing means (11) implemented and arranged to at least partially define the central inlet portion (6) at the front of the inlet nozzle. Suction nozzle.   The said front airflow sealing means (11) is formed in two parts, The said sound-blocking means (12) is arrange | positioned along the front surface of the said suction nozzle between two parts. Suction nozzle.   The central suction port is defined by inner and outer side airflow sealing means (8) each extending from the suction pipe (4) to the side surface (9a) of the suction nozzle. 6. A suction nozzle according to any one of the preceding claims, wherein portions (6) are defined by said inner side airflow sealing means (8) of each said side suction port portion (7).   The front airflow sealing means (11) is formed so as to be able to swivel into the suction chamber (3), and the front airflow sealing means (11) is completely free from touching the inner side airflow sealing means (8). Suction nozzle according to claims 4 and 6, having dimensions such that it can swivel into the suction chamber (3).   If the front air flow sealing means (11) is shaped like a rectangle and the front air flow sealing means (11) is a suction nozzle placed on the floor from the housing (1), it extends to the floor and the side A region rounded on one side of the airflow sealing means (8) and / or on the opposite side of the housing (1), the front airflow sealing means (11) extending from the first housing (1) to the floor And a second region connected thereto, wherein the second region is characterized by a lower strength relative to the first region, and / or the forward air flow sealing means (11) is placed on the floor. The suction nozzle according to claim 4, wherein the suction nozzle extends in the direction of the suction chamber (3) and is bent with respect to the vertical line of the floor.   The front airflow sealing means (11) is formed such that one gap is formed between the front airflow sealing means (11) and the two inner side airflow sealing means (8). A suction nozzle according to claims 4 and 6 or claim 7 or 8.   The sound blocking means (12) is V-shaped or partially circular, has an open shape toward the back side of the suction nozzle, and / or the sound blocking means (12) is made of synthetic resin, And / or combined with claim 3 or claim 3 formed of a stiffer material with respect to the forward air flow sealing means (11) as long as one forward air flow sealing means (11) is provided according to claim 4. The suction nozzle according to any one of claims 4 to 9.   The front airflow sealing means (11) is formed as a plurality of suction airflow sound blocking means (12), and the suction airflow sound blocking means (12) is disposed along the front surface of the housing (1). The suction nozzle according to claim 5, wherein the suction nozzle is combined with 4 or claim 4.   The front air flow sealing means (11) is arranged between the suction pipe (4) and the front surface of the housing (1) away from the front surface, or arranged on the front surface of the edge of the housing (1), and / or The suction nozzle according to any one of claims 5 to 11 combined with claim 4 or claim 4 extending parallel to the front surface.   The suction port (5) and / or the central suction port part (6) has a shape like an isosceles triangle, preferably the suction pipe (4) is in the apex region between the sides of the triangle. (3), the suction chamber (3) has a central suction port portion (6) extending from the suction pipe (4) to the base (6a) of an isosceles triangle, and the side suction port portion (7) 13. The mold according to claim 1, wherein the pipe is formed so as to extend from the suction pipe (4) along each side of the isosceles triangle to the corner (7 a) of the isosceles triangle disposed on the opposite side of the apex. The suction nozzle described in 1.   Longitudinal extension of the two side suction port portions (7) on each side surface (9a) of the suction nozzle so that the two side suction port portions (7) are separated from the suction pipe (4) The angle α between the directions extends 45 ° ≦ α ≦ 160 °, preferably 90 ° ≦ α ≦ 135 °, particularly preferably α extends equal to or substantially equal to 135 °, or the two sides 14. A suction nozzle according to any one of the preceding claims, wherein the suction port portion (7) extends away from the suction pipe (4) in a curved manner.   The inlet (5) has a further central inlet part and two further side inlet parts on the sides of the further central inlet part, the central inlet part (6) and the further central inlet part Part away from the inlet pipe (4) in the opposite direction, so that the two side inlet parts (7) and the two further side inlet parts form an X-shaped arrangement The suction nozzle according to any one of claims 1 to 14, which extends like this.

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