EP3525647B1 - Appareil de nettoyage et procédé de fabrication d'un appareil de nettoyage - Google Patents

Appareil de nettoyage et procédé de fabrication d'un appareil de nettoyage Download PDF

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Publication number
EP3525647B1
EP3525647B1 EP16781419.3A EP16781419A EP3525647B1 EP 3525647 B1 EP3525647 B1 EP 3525647B1 EP 16781419 A EP16781419 A EP 16781419A EP 3525647 B1 EP3525647 B1 EP 3525647B1
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EP
European Patent Office
Prior art keywords
outlet
inlet
outlet pipe
inlet pipe
pipe
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EP16781419.3A
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German (de)
English (en)
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EP3525647A1 (fr
Inventor
Dominik Scholl
Andreas Neu
Florian EBERT
Felix BENSING
Simon Jetter
Markus Oesterle
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Alfred Kaercher SE and Co KG
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Alfred Kaercher SE and Co KG
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Publication of EP3525647A1 publication Critical patent/EP3525647A1/fr
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping

Definitions

  • the invention relates to a cleaning device, comprising at least one noise source and an air guiding device with at least one flow deflection element, the at least one flow deflection element having a first arm with an inlet pipe and a second arm with an outlet pipe, the outlet pipe being oriented transversely to the inlet pipe, the inlet pipe having a
  • the inlet has an extension in a first depth direction and in a first width direction
  • the outlet pipe has an outlet with a depth in a second depth direction and a width in a second width direction
  • the first depth direction and the second depth direction are oriented parallel to one another
  • the first Width direction and the second width direction are oriented transversely to one another.
  • the invention also relates to a method for producing a cleaning device, comprising at least one noise source and an air guiding device with at least one flow deflection element, the at least one flow deflection element having a first arm with an inlet pipe and a second arm with an outlet pipe, the outlet pipe being oriented transversely to the inlet pipe the inlet pipe has an inlet with an extension in a first depth direction and in a first width direction, the outlet pipe has an outlet with a depth in a second depth direction and a width in a second width direction, the first depth direction and the second depth direction oriented parallel to one another are, and the first width direction and the second width direction are oriented transversely to one another.
  • a suction device comprising a blower device for generating a suction air flow and an air guiding device which has at least one flow deflection element with an inlet pipe and an outlet pipe, the outlet pipe is oriented transversely to the inlet pipe.
  • a sound mirror device on which sound is reflected and / or sound is absorbed, is arranged at a transition area between the inlet pipe and the outlet pipe.
  • a cleaning device comprising at least one noise source with a noise emission in a frequency range below 2000 Hz and at least one perforated plate resonator, which is assigned to the at least one noise source.
  • a vacuum cleaner in which a suction unit is surrounded in the circumferential direction by two semicircular outlet channels which open into a common outlet opening for discharging the suction air sucked in by the suction unit.
  • the invention is based on the object of providing a cleaning device of the type mentioned at the outset, in which an effective noise reduction can be achieved.
  • this object is achieved according to the invention in that the width is at least 1.2 times the depth.
  • the at least one flow deflection element is designed to be “flat” in relation to its depth.
  • the corresponding flow deflection element can be installed in a large number of applications. For example, it can be installed in a guide device for exhaust air in a suction device or in a guide device for cleaning air for a filter device of a suction device. It can also be installed, for example, in a cooling air duct of a cleaning device.
  • the second depth direction and the second width direction are oriented transversely and preferably perpendicular to one another.
  • the inlet pipe and the outlet pipe are oriented transversely to one another. For example, they can be oriented at an angle of 90 ° ⁇ 20 ° to one another. In one embodiment, the first width direction and the second width direction are perpendicular to one another. This results in an effective noise reduction.
  • the width and the depth at the outlet advantageously relate to a rectangular envelope which has sides with an extension in the second depth direction and the second width direction.
  • the noise reduction effect can be achieved if there is a rectangular cross-sectional area at the outlet (in which case an outline of the cross-sectional area is the envelope), or if the cross-sectional area is not rectangular but has a rectangular envelope.
  • the width and depth are then measured for the ratio (which is at least 1.2).
  • the inlet has a rectangular envelope, which has sides that extend in the first depth direction and the first width direction.
  • the cross-sectional area at the inlet can be rectangular or can have a different shape.
  • the ratio of the width to the depth (at the outlet) is at least 1.5: 1 and in particular at least 2: 1 and in particular at least 3: 1 and in particular at least 4: 1 and in particular at least 5: 1.
  • the higher this ratio of width to depth the more effective the noise reduction.
  • a very effective noise reduction results, for example, from a ratio of 2: 1.
  • the outlet pipe prefferably has the same cross section from the outlet to a connection area with the inlet pipe.
  • the inlet pipe has the same cross section from the inlet to a transition region to the outlet pipe.
  • a uniform flow velocity in a flow deflecting element can be achieved in a simple manner by appropriately designing the inlet pipe and the outlet pipe.
  • the inlet pipe at the inlet has the same hydraulic cross-sectional area as the outlet pipe at the outlet and in particular the cross-sectional area at the inlet has the same shape as the cross-sectional area at the outlet. This ensures that there is a uniform flow velocity during the flow.
  • the hydraulic cross-sectional area results from the hydraulic cross-section D H as ⁇ ⁇ D H 2/4 .
  • the hydraulic cross-section D H results in turn as the ratio of four times an (actual) cross-sectional area perpendicular to the main flow direction to the circumference of this cross-sectional area.
  • an outlet of the outlet pipe forms an opening into the surroundings of the cleaning device or the outlet of the outlet pipe is connected in a flow-effective manner to an opening into the surroundings.
  • the flow deflection element can bring about a “last deflection” for air before it is released to the environment.
  • the inlet of the inlet pipe forms an orifice which is in flow-effective connection with the noise source or with a sound generator coupled to the noise source.
  • exhaust air which is emitted directly from a fan device to a suction fan device can be coupled into the inlet of a flow deflection element in order to achieve efficient flow guidance with effective noise reduction.
  • a hydraulic cross-sectional area of the at least one flow deflection element between the inlet and the outlet is at least approximately constant, at least outside of a transition area between the inlet pipe and the outlet pipe. This allows pressure losses to be minimized. A uniform flow velocity can be achieved.
  • an area or sub-area of the inlet pipe with a rectangular cross-sectional area and an area or sub-area of the outlet pipe with a rectangular cross-sectional area adjoin one another and at least at the ends of a transition area between the inlet pipe and the outlet pipe, the cross-sectional areas are the same (and thereby rectangular). This results in a simple design.
  • the first arm has a non-rectangular cross-sectional area in a partial area with a first transition area to a rectangular cross-sectional area and / or the second arm has a partial area with a non-rectangular cross-sectional area with a second transition area to a rectangular cross-sectional area.
  • the first transition area or second transition area can, for example, have a circular cross-sectional area.
  • the inlet pipe at the inlet and / or the outlet pipe at the outlet has a rectangular cross-sectional area. This can be advantageous for certain applications. There is then no need to provide a transition area, rather the rectangular cross-sectional areas are then already formed at the inlet and / or outlet.
  • the inlet pipe at the inlet and / or the outlet pipe at the outlet has a non-rectangular cross-sectional area.
  • This can for example be oval or elliptical, can have an outer contour in the shape of a figure eight or the like.
  • the inlet pipe and the outlet pipe are oriented perpendicular to one another and / or the inlet of the inlet pipe has an opening surface with a first normal vector and the outlet of the outlet pipe has an opening surface with a second normal vector, the first normal vector and the second normal vector being perpendicular to stand by each other. If the inlet pipe and the outlet pipe are perpendicular to one another, there is an effective noise reduction by correspondingly influencing transverse modes, which are excited in the outlet pipe by an incoming basic mode.
  • the inlet pipe and the outlet pipe have a common edge at an external angular region, which edge extends in the first depth direction. This edge has in particular the first depth.
  • the edge is arranged in a trough in relation to an interior space of the flow deflecting element.
  • the trough can form a sound trough for additional noise reduction. It will refer to the in this context WO 2015/043641 A1 referenced.
  • a first wall of the inlet pipe and a second wall of the outlet pipe are oriented at an angle between 60 ° and 90 ° to one another at the edge at the outer angle region. If these are oriented at an angle of 90 ° to one another, no sound trough is formed. If this angle is between 60 ° and less than 90 °, then a sound trough is formed, the depth of which depends on the angle.
  • a transition area between the inlet pipe and the outlet pipe has a wall that is curved in relation to the first depth direction at an interior angle area.
  • a curved wall is in particular free of edges.
  • Such a curved wall is important for flow guidance. A pressure loss can be kept low by the flow deflection. It is referred to in this context to the WO 2015/043641 A1 referenced.
  • the curved wall lies opposite a common edge of the inlet pipe and the outlet pipe. In this way, an effective noise reduction can be achieved with good pressure loss values.
  • an inner radius on the curved wall is greater than half the hydraulic diameter of the inlet pipe. This results in a minimization of pressure losses when the flow is deflected. In this way, with great acoustic effectiveness in terms of noise reduction, a flow deflection can be achieved with minimized pressure loss. It is referred to in this context to the WO 2015/043641 A1 referenced.
  • the air guide device is a guide device for cooling air. Basically, such a guide device for cooling air, sound can be emitted to the outside. If a corresponding flow deflection element is arranged on this air guiding device, an effective noise reduction can be achieved.
  • the air guide device is a guide device for process air.
  • exhaust air from a suction unit device of a suction device is process air in this sense. It can also be a guide device for cleaning air for a filter device of a suction device process air.
  • the cleaning device is a suction device.
  • the air guide device is a guide device for exhaust air from a suction unit device.
  • a fan device of a suction unit device emits exhaust air (clean air), which must be discharged to the outside.
  • This air can be the propagation medium for sound.
  • the guide device for exhaust air has at least one path on which the at least one flow deflecting element is arranged, the at least one path in particular being curved.
  • a curved path is for example in the EP 1 559 359 A2 described.
  • exhaust air can then be discharged in a defined manner via several channels.
  • a first flow deflecting element and a second flow deflecting element are arranged symmetrically and in particular mirror-symmetrically to the suction unit device. Thereby a relatively high volume flow can be discharged via at least two channels, with an effective noise reduction being achieved.
  • the at least one flow deflection element is arranged in such a way that the outlet pipe points in the direction of a base when the suction device is set up on the base for proper operation. This results in effective process air removal with an effective noise reduction and a compact design.
  • the at least one flow deflection element is arranged at the inlet of the guide device for exhaust air in relation to the suction unit device and / or is arranged at the outlet for exhaust air for discharge to the environment.
  • the air guide device prefferably be a guide device for cleaning air for cleaning a filter device of the suction device.
  • the cleaning device is designed as a high-pressure cleaner and that the at least one flow deflection element is arranged, for example, on a guide device for cooling air.
  • a method is provided in which, for a predetermined volume flow through the air guiding device, the at least one flow deflection element is dimensioned such that the width at the outlet is at least 1.2 times the depth.
  • the cross-sectional area is defined.
  • An effective noise reduction can be achieved if (in relation to a rectangular envelope) a width at the outlet is at least 1.2 times a depth.
  • This flat design of the at least one flow deflection element makes it possible to achieve an effective noise reduction.
  • the method according to the invention has the advantages already explained in connection with the cleaning device according to the invention.
  • a cleaning device is a suction device, which is in the Figures 1 to 3 is shown in a partial representation and denoted by 10.
  • the suction device 10 comprises a suction container 12 on which a wheel device 14 is arranged.
  • the suction device 10 can be set up on a base 16 via the wheel device 14.
  • a connection 18 for a suction hose is arranged on the suction container 12.
  • the suction device 10 has a suction head 20, which in the Figures 1 to 3 is shown in a partial representation.
  • the suction head 20 is detachably positioned on the suction container 12.
  • a suction unit device 22 is arranged in the suction head 20.
  • the suction unit device 22 comprises a fan 24 for generating a (negative pressure) suction flow and a motor and in particular an electric motor.
  • the suction device 10 has a filter device via which an interior space 26 can be acted upon by a suction flow which is generated by the suction unit device 22. Accordingly, the suction device 10 has a dirt side which faces the interior space 26, and a clean side which faces the suction head 20.
  • the suction device 10 has an air guiding device 28 which is arranged on the suction head 20.
  • the air guiding device 28 guides process air.
  • the air guide device 28 on the suction head 20 guides exhaust air (clean air) from the suction unit device 22 via the air guide device 28 as a guide device 30 for exhaust air, this exhaust air can be emitted to an environment around the suction device 10 (to an outside space in relation to the suction device 10).
  • the suction unit device 22 which is arranged on the suction head 20, is arranged in a region 33 which has at least approximately a circular cross-sectional area.
  • This area 33 is delimited by a first wall 34 and an opposite second wall 36. Both the first wall 34 and the second wall 36 are curved.
  • a first wall part 38 adjoins the first wall 36 and a second wall part 40 on the opposite side.
  • the first wall part 38 and the second wall part 40 are connected to the first wall 34.
  • a first wall part 42 and a second wall part 44 adjoin the second wall 36.
  • the first wall part 42 and the second wall part 44 are spaced apart from one another. Both the first wall part 42 and the second wall part 44 are connected to the second wall 36.
  • the first wall part 38 of the first wall 34 and the first wall part 42 of the second wall 36 are spaced apart from one another. They are aligned at least approximately parallel to one another. A first channel 46 is formed between them. This first channel 46 is closed at the bottom towards the suction container 12 and at the top in the opposite direction. (Due to the partial representation in Figure 1 to 3 the closed formation at the top is not shown.)
  • a second channel 48 is formed between the second wall part 40 of the first wall 34 and the second wall part 44 of the second wall 36.
  • the second wall parts 40 and 44 are at least approximately parallel to one another. They are spaced from each other around the second Form channel 48.
  • the second channel 48 like the first channel 46, is closed at the top and bottom.
  • the second channel 48 is aligned at least approximately parallel to the first channel 46.
  • the first channel 46 has a first opening 50, via which it opens into the area 33.
  • the second channel 48 has a second opening 52 via which it opens into the area 33.
  • the guide device 30 for exhaust air is formed via the first channel 46, the second channel 48 and the region 33, which guide device correspondingly has a guide path for exhaust air with a curved region (on the region 33).
  • the first channel 46 and the second channel 48 are arranged and designed at least approximately mirror-symmetrically to the suction unit device 22.
  • a corresponding mirror plane 54 runs centrally through the suction unit device 22.
  • a normal of the mirror plane 54 is oriented parallel to a wheel axis 56 of a rear wheel 58 of the wheel device 14.
  • the mirror plane 54 is oriented perpendicular to the base 16 when the suction device 10 is set up on the base 16 via the wheel device 14.
  • a flow deflection element 60 is arranged in each case.
  • the corresponding flow deflection elements 60 on the first channel 46 and the second channel 48 are in the areas designated by A 1 and A 2 in FIG Figures 1 to 3 arranged.
  • the flow deflecting elements 60 on the first channel 46 and the second channel 48 are of identical design.
  • the corresponding flow deflecting elements 60 are (mirror) symmetrical arranged with respect to the suction unit device 22 and thus the mirror plane 54.
  • the flow deflection elements 60 serve to deflect the flow and thereby reduce the sound emission of the suction device 10.
  • a first embodiment of a flow deflection element which in the Figures 4 and 5 and is denoted there by 60 ′, comprises a first arm 61 a with an inlet pipe 62 and a second arm 61 b with an outlet pipe 64.
  • the inlet pipe 62 has an inlet 66 which has a corresponding inlet opening 68. Air can be injected via the inlet 66.
  • the outlet pipe 64 has an outlet 70 with an outlet opening 72.
  • the first arm 61a of the flow deflection element 60 ′ forms the inlet pipe 62. Accordingly, the inlet 66 is an inlet of the flow deflection element 60 ′.
  • the second arm 61b is formed by the outlet pipe 64. Accordingly, the outlet 70 of the outlet pipe 64 is an outlet of the flow deflection element 60 '.
  • the inlet pipe 66 extends along a first axis 74.
  • the outlet pipe 64 extends along a second axis 76.
  • the first arm 61a and the second arm 61b are oriented transversely and in particular perpendicular to one another.
  • An envelope of the cross-sectional area at the inlet 66 or at the outlet 70 is a rectangle, this envelope directly delimiting this cross-sectional area.
  • the inlet pipe 62 and the outlet pipe 64 are correspondingly oriented transversely and in particular perpendicular to one another.
  • the first axis 74 and the second axis 76 lie transversely and in particular perpendicular to one another.
  • the inlet pipe 62 and the outlet ear 64 meet in an external angular region 78 at an edge 80. They also meet at an interior angle area 82 on top of each other. The inner angle area 82 is opposite the outer angle area 78 and in particular the edge 80.
  • the flow deflecting element 60 ′ has a transition region 84 at the inner angular region 82 from the inlet pipe 62 into the outlet pipe 64, which ensures a transition without edges.
  • the flow deflection element 60 ′ has the same hydraulic cross-sectional area at the inlet 66 and the outlet 70.
  • the hydraulic cross-sectional area is at least approximately constant over a flow length of the flow deflection element 60 '(over the flow guide between the inlet 66 and the outlet 70) in order to enable a corresponding volume throughput.
  • the flow deflecting element 60 ′ has a rectangular cross-sectional area at least outside of the transition region 84 over its entire flow length.
  • the inlet pipe 62 has the same cross-sectional area from the inlet 66 to the transition region 84.
  • the outlet pipe 64 has the same cross-sectional area from an outlet 70 to the transition region 84.
  • the cross-sectional area which is oriented perpendicular to the first axis 74 on the inlet pipe 62 and is oriented perpendicular to the second axis 76 on the outlet pipe 64 is rectangular.
  • the (inner) cross-sectional area has a first depth T 1 in a first depth direction 86 and a first width B 1 in a first width direction 88 perpendicular to the first depth direction 86.
  • the first The depth direction 86 and the first width direction 88 are each oriented perpendicular to the first axis 74.
  • the outlet pipe 64 has (outside of the transition region 84) a second depth T 2 in a second depth direction 90 and a second width B 2 in a second width direction 92.
  • the second depth direction 90 and the second width direction 92 are perpendicular to one another.
  • the second depth direction 90 and the second width direction 92 are oriented perpendicular to the second axis 76 of the outlet pipe 64.
  • first width B 1 and the second width B 2 have the same size (B).
  • first depth T 1 and the second depth T 2 have the same size (T).
  • the first width direction 88 and the second width direction 92 are transverse and in particular perpendicular to one another.
  • the first depth direction 86 and the second depth direction 90 are parallel to one another.
  • the width B 2 and the depth T 2 at the outlet 70 are in a specific ratio to one another, namely this specific ratio is at least 1.2: 1. (Due to the geometric design with the same rectangular cross-sectional area on the inlet pipe 62 and the outlet pipe 64, this ratio also applies to the width B 1 and the depth T 1. )
  • the flow deflecting element 60 ′ has a first wall 94a and a second wall 94b opposite in parallel.
  • the first wall 94a and the second wall 94b are spaced apart from one another in the depth direction 86 and 90, respectively.
  • the flow deflecting element 60 ' is closed outside the inlet 66 and the outlet 70 by a first wall area 96a and by a second wall area 96b.
  • the first wall area 96a connects the first wall 94a and the second wall 94b at the outer angle area 78 and the second wall area 96b connects the first wall 94a and the second wall 94b at the inner angle area 82.
  • the second wall area 96b is rounded at the transition area 84 for an edge-free design.
  • a corresponding inner radius R ( Figure 5 ) of an osculating circle 100 on an outside of the inner angular area 82 in the transition area 84 is larger than half the hydraulic diameter of the inlet pipe 62 (outside the transition area 84), for example at the inlet 66.
  • the hydraulic diameter results as the ratio of four times the cross-sectional area perpendicular to Main flow direction to the circumference of the cross-sectional area.
  • the inlet opening 68 of the inlet pipe 62 has a normal vector 102. This is oriented in particular parallel or anti-parallel to the first axis 74.
  • the outlet port 72 has a normal vector 104. This is oriented in particular parallel or anti-parallel to the second axis 76.
  • the first wall region 96a has a first partial region 106a on the inlet pipe 62 and a second partial region 106b on the outlet pipe 64.
  • the sub-area 106a and the sub-area 106b meet at the edge 80 with the depth D at right angles.
  • a trough 108 is formed on the edge 80, in which the edge 80 then lies on an inner side of the flow deflection element 60 ′.
  • the second sub-area 106b of the second wall area 96b has a first sub-area 110a and a second sub-area 110b.
  • the first sub-area 110a adjoins the outlet 70.
  • the second sub-area 110b adjoins the edge 80 and the first sub-area 110a.
  • the first sub-region 110a is oriented parallel to the second axis 76.
  • the first partial area 106a of the second wall area 96b is oriented parallel to the first axis 74.
  • the second sub-region 110b of the second partial region 106b is oriented at an acute angle to the second axis 76 and correspondingly at an obtuse angle to the first axis 74.
  • An angle 112 between the first sub-area 106a of the second wall area 96b (and thus the first axis 74) and the second sub-area 110b is between 60 ° and 90 °. If this angle is 90 ° and thus the second sub-region 110b lies parallel to the second axis 76, there is none Well 108 formed.
  • the trough is formed with a corresponding depth when the angle 112 deviates from 90 °. In particular, it should not be smaller than 60 °.
  • the trough 108 makes it possible to realize a sound trough through which an effective noise reduction can be brought about. It is referred to in this context to the WO 2015/043641 A1 referenced.
  • the respective flow deflection element 60 ′ is arranged on the suction head 20 such that the respective inlet pipe 62 is connected to the first channel 46 or the second channel 48.
  • the respective inlet pipe 62 lies at least approximately with the corresponding first axis 74 parallel to a channel longitudinal direction of the first channel 46 or the second channel 48.
  • the outlet pipe 64 points towards the base 16. Exhaust air can be emitted to the surroundings of the suction device 10 directly via the corresponding outlet 70 or via a corresponding outlet device.
  • a first arm 113a with an inlet pipe 114 and a second arm 113b with an outlet pipe 116 are provided, which are oriented transversely and in particular perpendicular to one another.
  • the inlet pipe 114 and the outlet pipe 116 are also transverse and in particular perpendicular to one another.
  • the inlet pipe 114 has a rectangular area 118.
  • the outlet pipe 116 has a rectangular area 120.
  • the inlet pipe 114 has an inlet 119.
  • This has a rectangular cross section with a width B 1 in the corresponding width direction and a depth T 1 in the corresponding depth direction.
  • the outlet pipe 116 has an outlet 121.
  • This has a rectangular cross section with a width B 2 in a width direction and a depth T 2 in a depth direction.
  • a first transition area 122 of the first arm 113a adjoins the rectangular area 118, on which an entrance 124 is located.
  • the entrance 124 has a non-rectangular cross-sectional area.
  • the first transition area 122 serves to provide a transition from the non-rectangular inlet 124, which has a circular opening area, for example, to the rectangular area 118 with the inlet 119.
  • the transition is such that, in particular, the hydraulic cross-sectional area along the first transition region 122 along an axis of the inlet pipe 114 remains at least approximately constant.
  • the rectangular area 120 of the outlet pipe 116 is followed by a second transition area 126 which opens into an outlet 128.
  • the exit 128 likewise has a non-rectangular cross-sectional area and the second transition area 126 is used accordingly for the transition to the rectangular area 120.
  • the inlet 124 and the outlet 128 have the same cross-sectional area.
  • the first arm 113a is formed by the inlet tube 114 and the first transition region 122.
  • the inlet 119 is spaced from the inlet 124, the inlet 124 forming one end of the first arm 113a.
  • the second arm 113b is formed by the outlet pipe 116 and the second transition region 126.
  • the outlet 121 is spaced apart from the outlet 128, the outlet 128 forming one end of the second arm 113.
  • the essential part of the flow deflection element 60 ′ for sound damping is the area between the inlet pipe 114 and the outlet pipe 116.
  • the flow deflecting element 60 ′′ does not have a trough. It can be provided with such a trough.
  • the flow deflecting element 60 ′ or 60 ′′ can be used, for example, with the cleaning device 10 or also in other applications.
  • the flow deflection element 60 or 60 'or 60 "is”"flat” based on its depth T 2 at the outlet 70 or 121.
  • the width B 2 on a rectangular cross-sectional area is greater than the depth T. 2 and is in particular at least 1.2 times the depth T 2 .
  • Figure 7 are measured values for flow deflection elements with the basic design as in Figure 6 for different ratios B 2 to T 2 shown. It shows the transmission loss ⁇ TM in dB (A). The transmission losses are shown on a negative scale. The more negative this value, the more effectively a noise reduction takes place when there is a flow through the corresponding flow deflection element 60 ′′.
  • the sound wave entering the inlet pipe excites transverse modes at the transition into the outlet pipe 116.
  • the excitation and propagation of transverse modes depends on the frequency.
  • the frequency f 2 is a type of maximum frequency at which a transverse mode can no longer propagate.
  • width B 2 is now selected to be large for a given depth T 2 , an effective noise reduction can be achieved due to the influence on the propagation of transverse modes.
  • the surface area of the cross-sectional area B 2 ⁇ T 2 is predetermined by the fact that a certain volume flow can flow in the air guiding device 28.
  • the product B 2 ⁇ T 2 is therefore predetermined in particular by the corresponding dimensioning of the suction unit device 22.
  • An effective noise reduction can be achieved by adapting the ratio of B 2 to T 2 , which is at least 1.2.
  • the suction unit device 22 forms a noise source which is a direct or indirect sound generator.
  • This noise source is not mono-frequent, for example, but has a frequency spectrum.
  • An effective noise reduction can be achieved with the solution according to the invention (compare the Figures 7 and 9 (b) ).
  • the flow deflection elements 60 or 60 ′ or 60 ′′ are installed transversely, so to speak, in the sense that they cause a flow deflection transversely to a guide plane of the guide device 30 at the area 33 and the first channel or the second channel 48
  • the main direction of flow in the area 33 and in the channels 46, 48 lies parallel to this plane.
  • the flow deflection elements 60, 60 ', 60 ′′ in the suction device 10 cause a flow deflection transversely and in particular perpendicular thereto.
  • a guide device 136 is provided for exhaust air. This is linked to a suction unit 138.
  • the guide device 136 has a channel 140 which opens into the outer space via an opening device 142.
  • This channel 140 defines a curved guideway.
  • the channel 140 is connected in a flow-effective manner to the suction unit device 138, that is to say to an exhaust air orifice thereof, via a flow deflection element 60 (which can be designed as a flow deflection element 60 ′ or 60 ′′).
  • the inlet pipe 114 opens in the direction of the suction unit device 138 and the outlet pipe 116 opens in the channel 140.
  • the inlet 124 and the outlet device 142 are in particular at least approximately diametrically opposite.
  • the flow deflection element 60 ensures that the flow is deflected starting from the suction unit device 138 into the channel 140. Air is then emitted from duct 140 (after noise reduction at flow deflection element 60).
  • the flow deflecting element (s) 60 is or are connected more or less directly upstream of an opening device into the outer space.
  • the flow deflection elements 60 do not ensure a flow deflection from the area 33 into the channels 46, 48. This is done by appropriately designing these areas and channels.
  • the flow deflecting element 60 is connected directly downstream of the suction unit device 138 and ensures a flow deflection in the area of the coupling of exhaust air into the guide device 136.
  • FIG. 11 Another exemplary embodiment of a cleaning device is a high-pressure cleaner 144 ( Figure 11 ).
  • a high-pressure cleaner has in particular a pump unit 146 as a noise source.
  • the high-pressure cleaner has an air guiding device 148. This is used in particular to guide cooling air.
  • a flow deflection element 60 is positioned on the air guide device 148, for example, directly associated with the pump unit 146. This ensures a flow deflection in order, for example, to allow cooling air to flow along an upper side 150 of a housing 152 inside the housing 152 in a channel 154.
  • the flow deflection element 60 ensures, as described above, a noise reduction, with a noise reduction of approximately 8 dB (A) being achievable, in particular with a corresponding selection of the ratio of B to T.
  • a flow deflection element 60 or 60 'or 60 which has rectangular areas, the ratio of a width to a depth at a corresponding cross-sectional area at an outlet being greater than or at least 1.2. This results in an effective noise reduction The resulting pressure losses are acceptable.
  • the physical effect of the strong noise reduction through a "flat" flow deflection element 60 is due to the excitation of transverse modes and prevention of the propagation of transverse modes in the outlet pipe 64 or 116.
  • Corresponding flow deflection elements can be used on a large number of cleaning devices such as suction devices (stand-alone or, for example, used in vehicles).
  • the corresponding “noisy” air guide device can, for example, be a process air guide device or a cooling air guide device.
  • the air guide device is, for example, a guide device for exhaust air.
  • it can also be a guide device for cleaning air for cleaning the filter.
  • the flow deflecting element 60 is dimensioned according to the invention in such a way that the ratio of B 2 to T 2 is set at an outlet 70 for a given volume flow.
  • the volume flow determines the cross-sectional area at inlet 66 and outlet 70.
  • the ratio of B 2 to T 2 is chosen so that the desired noise reduction results with functionally acceptable pressure losses.
  • the frequency spectrum of the noise source such as a suction unit device 22 can also be taken into account.
  • the cross-sectional areas at the respective inlets 66 and 119 and respective outlets 70 and 121 are the same and rectangular.
  • a first arm 202a is formed by an inlet pipe 204.
  • a second arm 202b oriented perpendicular to the first arm 202a is formed by an outlet pipe 206.
  • the inlet pipe 204 has an inlet 208.
  • the outlet pipe 206 has an outlet 210.
  • the inlet 208 has a rectangular cross-sectional area with a width B 1 in a first width direction and a depth T 1 in a first depth direction.
  • the outlet 210 is rectangular and has a width B 2 in a second width direction and a depth T 2 in a second depth direction.
  • the first depth direction and the second depth direction are parallel to one another, as in the case of the flow deflection elements 60 ', 60 ".
  • the first width direction and the second width direction are perpendicular to one another.
  • the depth T 1 and the depth T 2 are the same.
  • the widths B 1 and B 2 are different. In particular, the width B 2 at the outlet 210 is greater than the width B 1 .
  • the flow deflecting element 200 is dimensioned such that the ratio of the width B 2 to the depth T 2 at the outlet 210 is at least 1.2: 1 or greater, as mentioned above, in order to achieve an effective noise reduction.
  • FIG. 13 Another exemplary embodiment of a flow deflection element 212 ( Figure 13 ) again comprises an inlet pipe 214 with an inlet 216 and an outlet pipe 218 oriented perpendicular thereto with an outlet 220.
  • the cross-sectional areas at the inlet 216 and at the outlet 220 are the same. They are not exactly rectangular, but rounded off at the rectangle corners.
  • a cross-sectional area 222 at the outlet 220 (correspondingly also at the inlet 216) has an envelope 224 which is a rectangle, the sides of the rectangle of this envelope 224 having a width B 2 in a (second) width direction and a depth T 2 perpendicular thereto in a (second) direction of depth.
  • envelope 224 which is a rectangle, the sides of the rectangle of this envelope 224 having a width B 2 in a (second) width direction and a depth T 2 perpendicular thereto in a (second) direction of depth.
  • inlet 216 Corresponding conditions also apply to inlet 216.
  • the outlet pipe 218 is dimensioned in such a way that, based on the envelope 224, the ratio of the width B 2 to the depth T 2 is at least 1.2.
  • an inlet pipe 232 with an inlet 234 and an outlet pipe 236 oriented perpendicular thereto with an outlet 238 are provided.
  • the inlet pipe 232 and the outlet pipe 236 have the same cross-sectional area outside a transition region between the inlet pipe 232 and the outlet pipe 236.
  • a cross section at the outlet pipe 236 (and the outlet pipe 232) outside such a transition region is oval or elliptical.
  • a cross-sectional area 240 at the outlet 238 (and correspondingly also at the inlet 234) has an envelope 242 which is a rectangle.
  • This rectangular envelope 242 has a width B 2 in a (second) width direction and a depth T 2 in a (second) depth direction.
  • ratios are present at the inlet 234 in a first width direction and in a second depth direction.
  • the flow deflection element 230 is dimensioned such that at the outlet 238 the ratio of the width B 2 to the depth T 2 is at least 1.2.
  • FIG. 15 Another embodiment of a flow deflection element 250 ( Figure 15 ) has an inlet pipe 252 and an outlet pipe 254. An inlet 256 is formed on the inlet pipe 252. An outlet 258 is formed on the outlet pipe 254.
  • a cross-sectional area of the inlet pipe 252 and the outlet pipe 254 are the same outside of a transition area between the inlet pipe 252 and the outlet pipe 254.
  • An outer contour of the corresponding cross-sectional area (in particular at the outlet 258 and the inlet 256) has approximately the shape of a horizontal figure eight.
  • An envelope 260 of a cross-sectional area 262 at the outlet 258 is a rectangle of a width B 2 in a (second) width direction and a depth T 2 in a (second) depth direction.
  • the flow deflection element 250 is dimensioned such that this width B 2 is at least 1.2 times the depth T 2 .
  • the flow deflection elements 200, 212, 230, 250 are basically designed in the same way as the flow deflection elements 60 or 60 '. In particular, they can be provided with a depression corresponding to depression 108. It is possible that transition areas adjoin the corresponding inlet pipes and / or outlet pipes as described above with reference to the flow deflection element 60 ′′.
  • the cross section at the respective outlet 210, 220, 238, 258 is direct (in the case of the flow deflection element 200) or for a rectangular envelope 224, 242, 260, such that the ratio of the width B. 2 to the depth T 2 is at least 1.2 in order to achieve an effective noise reduction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Claims (15)

  1. Appareil de nettoyage, comprenant au moins une source sonore (22) et un dispositif de guidage d'air (28) avec au moins un élément déflecteur d'écoulement (60 ; 60' ; 60" ; 200 ; 212 ; 230 ; 250), dans lequel l'au moins un élément déflecteur d'écoulement présente un premier bras (61a ; 113a) avec un tuyau d'admission (62 ; 114) et un deuxième bras (61b ; 113b) avec un tuyau d'évacuation (64 ; 116), le tuyau d'évacuation (64 ; 116) est orienté transversalement au tuyau d'admission (62 ; 114), le tuyau d'admission (62 ; 114) présente une admission (66 ; 119) avec une extension dans un premier sens de la profondeur (86) et dans un premier sens de la largeur (88), le tuyau d'évacuation (64 ; 116) présente une évacuation (70 ; 121) avec une profondeur (T2) dans un deuxième sens de la profondeur (90) et une largeur (B2) dans un deuxième sens de la largeur (92), le premier sens de la profondeur (86) et le deuxième sens de la profondeur (90) sont orientés parallèlement l'un à l'autre, et le premier sens de la largeur (88) et le deuxième sens de la largeur (92) sont orientés transversalement l'un à l'autre, caractérisé en ce que la largeur (B2) atteint au moins 1,2 fois la profondeur (T2).
  2. Appareil de nettoyage selon la revendication 1, caractérisé par au moins un de ce qui suit :
    le deuxième sens de la profondeur (90) et le deuxième sens de la largeur (92) sont orientés transversalement et en particulier perpendiculairement l'un à l'autre ;
    le premier sens de la largeur (88) et le deuxième sens de la largeur (92) sont perpendiculaires l'un à l'autre ;
    la largeur (B2) et la profondeur (T2) sur l'évacuation (70 ; 121 ; 220 ; 238 ; 258) se rapportent à une enveloppe rectangulaire (224 ; 242 ; 260), laquelle présente des côtés avec une étendue dans le deuxième sens de la profondeur (90) et le deuxième sens de la largeur (92) ;
    l'admission (66 ; 119 ; 213 ; 234 ; 256) présente une enveloppe rectangulaire, laquelle présente des côtés qui s'étendent dans le premier sens de la profondeur (86) et le premier sens de la largeur (88) ;
    le rapport de la largeur (B2) sur la profondeur (T2) atteint au moins 1,5:1 et en particulier au moins 2:1 et en particulier au moins 3:1 et en particulier au moins 4:1 et en particulier au moins 5:1.
  3. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé par au moins un de ce qui suit :
    le tuyau d'évacuation (64) présente une section transversale identique de l'évacuation (70) jusqu'à une zone de liaison au tuyau d'admission (62) ;
    le tuyau d'admission (62) présente une section transversale identique de l'admission (66) jusqu'à une zone de transition vers le tuyau d'évacuation (64) ;
    le tuyau d'admission (62 ; 114) présente sur l'admission (66 ; 124) une surface de section transversale hydraulique identique au tuyau d'évacuation (64 ; 116) sur l'évacuation (70 ; 128) et en particulier la surface de section transversale sur l'admission (66 ; 124) présente la même forme que la surface de section transversale sur l'évacuation (70 ; 128).
  4. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé par au moins un de ce qui suit :
    l'évacuation (70 ; 128) du tuyau d'évacuation (64 ; 116) forme une embouchure dans un environnement de l'appareil de nettoyage ou l'évacuation (70 ; 128) du tuyau d'évacuation (64 ; 116) est en liaison fluidique avec une embouchure donnant sur l'environnement ;
    une admission (66 ; 124) du tuyau d'admission (62 ; 114) forme une embouchure, laquelle est en liaison fluidique avec la source sonore (22) ou un générateur de bruit couplé à la source sonore.
  5. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une surface de section transversale hydraulique de l'au moins un élément déflecteur d'écoulement (60 ; 60' ; 60'') entre l'admission (66 ; 124) et l'évacuation (70 ; 128) est au moins approximativement constante, au moins à l'extérieur d'une zone de transition (84) entre le tuyau d'admission (62 ; 114) et le tuyau d'évacuation (64 ; 116).
  6. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'admission (66 ; 119) du tuyau d'admission (62 ; 114) forme une extrémité du premier bras (61a ; 113a) ou est espacée d'une extrémité du premier bras (61a ; 113a), et/ou caractérisé en ce que l'évacuation (70 ; 121) du tuyau d'évacuation (64 ; 116) forme une extrémité du deuxième bras (61b ; 113b) ou est espacée d'une extrémité du deuxième bras (61b ; 113b).
  7. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une zone ou zone partielle (118) du tuyau d'admission (62 ; 114) avec une surface de section transversale rectangulaire et une zone ou zone partielle (120) du tuyau d'évacuation (64 ; 116) avec une surface de section transversale rectangulaire sont adjacentes l'une à l'autre et, au moins aux extrémités d'une zone de transition (84 ; 130) entre le tuyau d'admission (62 ; 114) et le tuyau d'évacuation (64 ; 116), les surfaces de section transversale sont identiques, et/ou
    caractérisé en ce que le premier bras (113a) présente dans une zone partielle une surface de section transversale non rectangulaire avec une première zone de transition (122) vers une surface de section transversale rectangulaire (113b) et/ou que le deuxième bras (113b) présente dans une zone partielle une surface de section transversale non rectangulaire avec une deuxième zone de transition (126) vers une surface de section transversale rectangulaire.
  8. Appareil de nettoyage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le tuyau d'admission (62) présente sur l'admission (66) et/ou le tuyau d'évacuation (64) sur l'évacuation (70) une surface de section transversale rectangulaire, ou caractérisé en ce que le tuyau d'admission (232 ; 252) présente sur l'admission (234 ; 256) et/ou le tuyau d'évacuation (236 ; 254) sur l'évacuation (238 ; 258) une surface de section transversale non rectangulaire.
  9. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce que le tuyau d'admission (62 ; 114) et le tuyau d'évacuation (64 ; 116) sont orientés perpendiculairement l'un à l'autre et/ou que l'admission (66 ; 124) du tuyau d'admission (62 ; 114) présente une surface d'embouchure (68) avec un premier vecteur normal (102) et l'évacuation (70 ; 128) du tuyau d'évacuation (64 ; 116) présente une surface d'embouchure (72) avec un deuxième vecteur normal (104), dans lequel le premier vecteur normal (102) et le deuxième vecteur normal (104) sont perpendiculaires l'un à l'autre.
  10. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce que le tuyau d'admission (62 ; 114) et le tuyau d'évacuation (64 ; 116) présentent sur une zone angulaire extérieure (78) un bord (80 ; 132) commun, lequel s'étend dans le premier sens de la profondeur (86), et en particulier
    caractérisé en ce que le bord (80) est disposé dans un creux (108) par rapport à un espace intérieur de l'élément déflecteur d'écoulement (60 ; 60' ; 60''), et en particulier
    caractérisé en ce que, sur le bord (80 ; 132) sur la zone angulaire extérieure, une première paroi du tuyau d'admission (62 ; 114) et une deuxième paroi du tuyau d'évacuation (64 ; 116) sont orientées l'une par rapport à l'autre selon un angle (112) dans la plage comprise entre 60° et 90°.
  11. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une zone de transition (84 ; 130) entre le tuyau d'admission (62 ; 114) et le tuyau d'évacuation (64 ; 116) présente sur une zone angulaire intérieure une paroi (96b) courbée par rapport au premier sens de la profondeur (86), et en particulier
    caractérisé en ce que la paroi (96b) courbée est opposée à un bord (80) commun du tuyau d'admission (62) et du tuyau d'évacuation (64), et en particulier
    caractérisé en ce qu'un rayon intérieur (R) sur la paroi (96b) courbée est supérieur à un demi-diamètre hydraulique du tuyau d'admission (62).
  12. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de guidage d'air (28) est un dispositif de guidage pour l'air de refroidissement et/ou le dispositif de guidage d'air (28) est un dispositif de guidage (30) pour l'air de traitement.
  13. Appareil de nettoyage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'appareil de nettoyage est un appareil d'aspiration (10), et en particulier
    caractérisé en ce que le dispositif de guidage d'air (28) est un dispositif de guidage (30) pour l'air vicié d'un dispositif groupe d'aspiration (22), et en particulier
    caractérisé en ce que le dispositif de guidage (30) pour l'air vicié présente au moins une bande, sur laquelle est disposé l'au moins un élément déflecteur d'écoulement (60 ; 60' ; 60"), dans lequel l'au moins une bande est en particulier courbée, et en particulier
    caractérisé en ce qu'un premier élément déflecteur d'écoulement et un deuxième élément déflecteur d'écoulement sont disposés de manière symétrique et en particulier spéculairement symétrique par rapport au dispositif groupe d'aspiration (22), et en particulier
    caractérisé en ce que l'au moins un élément déflecteur d'écoulement (60 ; 60' ; 60") est disposé de sorte que le tuyau d'évacuation (64) est orienté en direction d'un support (16) lorsque l'appareil d'aspiration (10) est posé sur le sol (16) pour un fonctionnement correct, et en particulier
    caractérisé en ce que l'au moins un élément déflecteur d'écoulement (60 ; 60' ; 60") est disposé sur une entrée du dispositif de guidage (136) pour l'air vicié par rapport au dispositif groupe d'aspiration (138) et/ou est disposé sur une sortie pour l'air vicié à rejeter dans l'environnement, et en particulier
    caractérisé en ce que le dispositif de guidage d'air (28) est un dispositif de guidage pour l'air de nettoyage pour un nettoyage d'un dispositif de filtre de l'appareil d'aspiration.
  14. Appareil de nettoyage selon l'une quelconque des revendications 1 à 12, caractérisé par une réalisation sous la forme d'un nettoyeur haute pression.
  15. Procédé pour fabriquer un appareil de nettoyage selon le préambule de la revendication 1, selon lequel, pour un débit volumique prédéfini à travers le dispositif de guidage d'air (28), l'au moins un élément déflecteur d'écoulement (60 ; 60' ; 60") est dimensionné de sorte que, sur l'évacuation (70 ; 119 ; 210 ; 220 ; 238 ; 258), la largeur (B2) atteint au moins 1,2 fois la profondeur (T2).
EP16781419.3A 2016-10-12 2016-10-12 Appareil de nettoyage et procédé de fabrication d'un appareil de nettoyage Active EP3525647B1 (fr)

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WO2020078564A1 (fr) 2018-10-19 2020-04-23 Alfred Kärcher SE & Co. KG Machine d'aspiration munie d'un angle d'insonorisation
DE102021128167A1 (de) 2021-10-28 2023-05-04 Alfred Kärcher SE & Co. KG Reinigungsvorrichtung und Verwendung eines Strömungsumlenkungselements
DE102021128207A1 (de) 2021-10-28 2023-05-04 Alfred Kärcher SE & Co. KG Reinigungsvorrichtung mit Strömungsumlenkungselement mit Modenfilter und Verwendung eines Strömungsumlenkungselements mit Modenfilter
DE102021128206A1 (de) 2021-10-28 2023-05-04 Alfred Kärcher SE & Co. KG Reinigungsvorrichtung mit Strömungsumlenkungselement mit Einbauwandung und Verwendung eines Strömungsumlenkungselements mit Einbauwandung

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WO2018068850A1 (fr) 2018-04-19
EP3525647A1 (fr) 2019-08-21

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