EP3525647A1 - 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

Info

Publication number
EP3525647A1
EP3525647A1 EP16781419.3A EP16781419A EP3525647A1 EP 3525647 A1 EP3525647 A1 EP 3525647A1 EP 16781419 A EP16781419 A EP 16781419A EP 3525647 A1 EP3525647 A1 EP 3525647A1
Authority
EP
European Patent Office
Prior art keywords
outlet
inlet
cleaning device
tube
sectional area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16781419.3A
Other languages
German (de)
English (en)
Other versions
EP3525647B1 (fr
Inventor
Dominik Scholl
Andreas Neu
Florian EBERT
Felix BENSING
Simon Jetter
Markus Oesterle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP3525647A1 publication Critical patent/EP3525647A1/fr
Application granted granted Critical
Publication of EP3525647B1 publication Critical patent/EP3525647B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
  • a noise source and an air guide device having at least one flow deflection element, wherein the at least one flow deflection element has a first arm with an inlet tube and a second arm with an outlet tube, the outlet tube oriented transversely to the inlet tube, the inlet tube having an inlet with an extension in a first depth direction and in a first width direction, the outlet tube has an outlet having 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 parallel to each other, and the first width direction and the second width direction are oriented transversely to each other.
  • the invention further relates to a method for producing a cleaning device, comprising at least one noise source and an air guide device with at least one flow deflection element, wherein the at least one flow deflection element has a first arm with an inlet tube and a second arm with an outlet tube, the outlet tube oriented transversely to the inlet tube , the inlet tube has an inlet with an extension in a first depth direction and in a first width direction, the outlet tube 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 each other.
  • a suction device comprising a blower device for generating a suction air flow and an air guide device having at least one flow deflection element with an inlet pipe and an outlet pipe, wherein the outlet pipe oriented transversely to the inlet pipe.
  • a sound mirror device is arranged, on which sound is reflected and / or sound is absorbed.
  • 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 associated with the at least one noise source.
  • a vacuum cleaner in which a suction unit is surrounded in the circumferential direction by two semi-annular outlet channels, which open into a common outlet opening for dispensing the suction air sucked in by the suction unit.
  • the invention has for its object to provide a cleaning device of the type mentioned, in which can be achieved an effective noise reduction.
  • the at least one flow deflection element is “flat” in relation to its depth.
  • the corresponding flow deflection element can be installed in a variety of applications. For example, it can be installed in a guide device for exhaust air in a suction device or be installed 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 flow of a cleaning device.
  • the second depth direction and the second width direction are oriented transversely and preferably perpendicular to one another.
  • the inlet tube and the outlet tube are oriented transversely to each other. They may, for example, be oriented at an angle of 90 ° ⁇ 20 ° to each other. In one embodiment, the first width direction and the second width direction are perpendicular to each other. This results in an effective noise reduction.
  • the width and the depth at the outlet refer to a rectangular envelope having sides with an extension in the second depth direction and the second width direction.
  • the noise reduction effect can be achieved when there is a rectangular cross-sectional area at the outlet (where an outline of the cross-sectional area is the envelope), or when the cross-sectional area is not rectangular but has a rectangular envelope.
  • the width and depth are measured for the ratio (which is at least 1.2).
  • the inlet has a rectangular envelope which has sides which extend in the first depth direction and the first width direction.
  • the cross-sectional area at the inlet may be rectangular or may 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 has a same cross section from the outlet to a connection region with the inlet pipe.
  • the inlet pipe has a same cross section from the inlet to a transition region to the outlet pipe. It can be achieved by appropriate design of the inlet tube and the outlet tube in a simple manner, a uniform flow velocity in a flow deflection element. It is favorable if the inlet pipe at the inlet has a 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 again results 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. It can be provided that an outlet of the outlet pipe forms an orifice in an environment of the cleaning appliance, or the outlet of the outlet pipe is connected in a flow-efficient manner to an outlet into the environment.
  • the flow deflection element can cause a "last deflection" for air before being discharged to the environment.
  • the inlet of the inlet pipe can form an orifice in fluid communication with the noise source or a sound generator coupled to the noise source.
  • exhaust air which is discharged directly from a blower device to a suction blower 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 a transitional area between the inlet tube and the outlet tube. This allows pressure losses to be minimized. It can achieve a uniform flow velocity.
  • a portion of the inlet tube of rectangular cross-sectional area and a portion or portion of the outlet tube of rectangular cross-sectional area adjoin one another, and at least at the ends of a transition region between the inlet tube and the outlet tube, the cross-sectional areas are equal (and thereby rectangular).
  • 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. sectional area with a second transition region to a rectangular cross-sectional area.
  • the first transition region or second transition region may have, for example, a circular cross-sectional area.
  • the inlet tube at the inlet and / or the outlet tube at the outlet has a rectangular cross-sectional area. This can be advantageous for certain applications. There is then no transition region must be provided, but 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 may for example be oval or elliptical, may have an outer contour in the form of an eight or the like. It is favorable if the inlet tube and the outlet tube are oriented perpendicular to one another and / or the inlet of the inlet tube has a mouth area with a first normal vector and the outlet of the outlet tube has a mouth area with a second normal vector, wherein the first normal vector and the second normal vector are perpendicular to stand by each other.
  • the inlet tube and the outlet tube are perpendicular to each other, results in an effective noise reduction by appropriately influencing transverse modes, which are excited in the outlet tube by an incoming fundamental mode. It is favorable if the inlet tube and the outlet tube have a common edge at an outer angle region, which extends in the first depth direction. This edge has in particular the first depth. It can be provided that the edge is arranged in a trough with respect to an interior of the flow deflection element. The trough can form a sound well for additional noise reduction. Reference is made in this context to WO 2015/043641 Al.
  • Angle between 60 ° and 90 ° are oriented to each other. If these are oriented at an angle 90 ° to each other, then no sound well is formed. If this angle is between 60 ° and less than 90 °, then a sound well is formed whose depth is dependent on the angle.
  • a transition region between the inlet tube and the outlet tube at an interior angle region has a curved wall with respect to the first depth direction.
  • a curved wall is in particular edge-free.
  • Such a curved wall is important for flow guidance. It can be a pressure loss through the flow deflection keep low. It is in this context on the
  • the curved wall faces a common edge of the inlet tube and the outlet tube. This can be achieved with good pressure loss values effective noise reduction.
  • an inner radius on the curved wall is greater than a half of the hydraulic diameter of the inlet pipe. This results in a minimization of pressure losses in the flow deflection. It can thus be achieved with great acoustic efficiency with respect to noise reduction flow deflection with minimized pressure loss.
  • the air guide device is a guide device for cooling air.
  • a management device for cooling air sound emitted to the outside. If a corresponding flow deflection element is arranged on this air guide device, an effective noise reduction can be achieved.
  • the air guide device is a guide device for process air. For example, exhaust air of a suction device of a suction device process air in this sense. It can also be a guide device for cleaning air for a filter device of a suction process air.
  • the cleaning device is a suction device.
  • the air guide device is a guide device for exhaust air of a suction unit.
  • a blower device of a suction device emits exhaust air (clean air), which must be discharged to the outside. This air can be propagation medium for sound.
  • an effective noise reduction can be achieved by reducing the noise emission to the outside.
  • the exhaust air guide device has at least one track, on which the at least one flow deflection element is arranged, wherein the at least one track is, in particular, curved.
  • a curved path is described, for example, in EP 1 559 359 A2.
  • exhaust air can then be discharged in a defined manner over several channels. It can then be advantageous if a first flow deflection element and a second flow deflection element are arranged symmetrically and in particular mirror-symmetrically to the suction unit. Thereby a relatively high volume flow can be dissipated via at least two channels, whereby an effective noise reduction is achieved.
  • the at least one flow diverting element is arranged such that the outlet tube faces a support when the suction device is placed on the support for proper operation. This results in effective noise reduction effective process air discharge in a compact design. It can also be provided that the at least one flow deflection element is arranged at the inlet of the guide device for exhaust air relative to the suction unit and / or is arranged at the outlet for exhaust air for delivery to the environment. It is also possible that the air guiding device is a guiding device for cleaning air for a cleaning of a filter device of the suction device.
  • the cleaning device is designed as a high-pressure cleaner and that at least one flow deflection element is arranged, for example, on a guide device for cooling air.
  • a method in which, for a given volumetric flow through the air guiding device, the at least one flow deflecting element is dimensioned such that the width at the outlet is at least 1.2 times the depth.
  • the cross-sectional area is fixed.
  • An effective noise reduction can be achieved if (relative to a rectangular envelope) a width at the outlet at least the
  • This flat design of the at least one Strömungsumlenkungs- elements can be an effective noise reduction can be achieved.
  • the inventive method has the already explained in connection with the cleaning device according to the invention advantages.
  • Figure 1 is a partial perspective view of a suction device as an embodiment of a cleaning device
  • FIG. 2 shows another view of the cleaning device according to FIG.
  • Figure 3 is a view similar to Figure 1, with further parts of the cleaning device removed;
  • Figure 4 is a perspective view of a Ausfactun
  • a flow deflecting element for example, a flow deflecting element
  • FIG. 5 shows a sectional view of the flow deflection element according to FIG. 4;
  • Figure 6 is a perspective view of another example of a flow deflecting element
  • FIG. 7 shows a representation of the transmission loss in dB (A) and of the pressure loss for flow deflection elements with different ratios of the width B to the depth T;
  • FIG. 8 (a), (b), (c) schematically show the course of the sound pressure at a
  • FIG. 9 (a) shows a transmission loss in dB (A) for flow deflection elements according to FIG. 4 of a specific width as a function of the frequency;
  • FIG. 10 shows a schematic partial representation of an exemplary embodiment of a further cleaning device (a suction device).
  • Figure 11 is a schematic partial view of another cleaning device (a high-pressure cleaner); a perspective view of another imple mentation example of a Strömungsumschungs- elements;
  • Figure 13 is a perspective view of another embodiment of a Strömungsumschungs- elements;
  • Figure 14 is a perspective view of another embodiment of a Strömungsumschungs- elements; and Figure 15 is a perspective view of another embodiment of a Strömungsumschungs- elements.
  • An embodiment of a cleaning device is a suction device, which is shown in Figures 1 to 3 in a partial view and designated 10.
  • the suction device 10 comprises a suction container 12, on which a wheel device 14 is arranged. About the wheel assembly 14, the suction device 10 can be set up on a pad 16.
  • connection 18 is arranged for a suction hose.
  • the suction device 10 has a suction head 20, which is shown in the figures 1 to 3 in a partial view.
  • the suction head 20 is detachably positioned on the suction container 12.
  • a suction unit 22 is arranged in the suction head 20.
  • the suction unit 22 comprises a fan 24 for generating a (vacuum) 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 device 22. Accordingly, the suction device 10 has a dirty side, which faces the inner 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 carries process air.
  • the air guiding device 28 on the suction head 20 carries exhaust air (clean air) of the suction device 22 via the air guide device 28 as a guide. For exhaust air extraction device 30, this exhaust air to an environment around the suction device 10 (to an outside space based on the suction device 10) can be delivered.
  • the suction 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 region 33 is bounded by a first wall 34 and an opposite second wall 36. Both the first wall 34 and the second wall 36 are curved.
  • first wall portion 38 and opposite a second wall portion 40 connects.
  • the first wall part 38 and the second wall part 40 are connected to the first wall 34.
  • a first wall portion 42 and a second wall portion 44 connects.
  • the first wall part 42 and the second wall part 44 are spaced 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 from one another. They are aligned at least approximately parallel to each other. Between them, a first channel 46 is formed. This first channel 46 is closed down to the suction container 12 and up in the opposite direction. (Due to the partial view in Figure 1 to 3, the closed training is not shown up.) Between the second wall portion 40 of the first wall 34 and the second wall portion 44 of the second wall 36, a second channel 48 is formed. The second wall parts 40 and 44 are at least approximately parallel to each other. They are spaced apart from each other to the second Channel 48 to form. The second channel 48 is closed like the first channel 46 up and down.
  • the second channel 48 is aligned at least approximately parallel to the first channel 46.
  • the first channel 46 has a first mouth 50, via which it turns into the region 33.
  • the second channel 48 has a second mouth 52, via which it opens into the region 33.
  • the guide device 30 for exhaust air is formed, which accordingly has a guide path for exhaust air with a curved region (at the region 33).
  • the first channel 46 and the second channel 48 are at least approximately mirror-symmetrical to the Saugagg regat worn 22 angeord net and formed.
  • a normal of the mirror plane 54 is oriented paral lel to a wheel axle 56 of a H interrads 58 of the wheel assembly 14 is a central plane through the suction ⁇ agg.
  • the mirror plane 54 is oriented perpendicular to the U nterlage 16 when the suction device 10sammlungstel via the wheel assembly 14 immunitystel on the pad 16.
  • a flow deflecting element 60 is arranged in each case.
  • the corresponding flow deflecting elements 60 on the first channel 46 and the second channel 48 are arranged in the areas designated by Ai and A 2 in FIGS. 1 to 3. In principle, the flow deflection elements 60 are formed on the first channel 46 and the second channel 48 g.
  • the corresponding Strömungsumschiatasome 60 (a first flow ⁇ umlen kelement and a second Strömungsumschelement) are (mirror ) symmetrically with respect to the suction unit 22 and thus the
  • the Strömungsumschetti 60 serve to flow deflection and thereby reduce the noise emission of the suction device 10th
  • a first exemplary embodiment of a flow deflection element which is shown in FIGS. 4 and 5 and designated 60 'there, comprises a first arm 61a with an inlet tube 62 and a second arm 61b with an outlet tube 64.
  • the inlet tube 62 has an inlet 66, which has a corresponding inlet port 68. Air can be coupled in via the inlet 66. Accordingly, the outlet tube 64 has an outlet 70 with an outlet port 72.
  • the first arm 61a of the flow redirecting element 60 ' forms the inlet tube 62. Accordingly, the inlet 66 is an inlet of the flow redirecting element 60'.
  • the second arm 61 b is formed by the outlet pipe 64. Accordingly, the outlet 70 of the outlet tube 64 is an outlet of the flow redirecting element 60 '.
  • the inlet tube 66 extends along a first axis 74.
  • the outlet tube 64 extends along a second axis 76.
  • the first arm 61a and the second arm 61b are oriented transversely and, in particular, perpendicularly 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 being the boundary of this cross-sectional area.
  • the inlet tube 62 and the outlet tube 64 are oriented transversely and in particular perpendicular to each other.
  • the first axis 74 and the second axis 76 are transverse and in particular perpendicular to each other.
  • the inlet tube 62 and the outlet 64 meet at an edge 80 in an outer angle region 78. They also meet at an indoor angle range 82 on each other.
  • the inner angle region 82 is opposite the outer angle region 78 and in particular the edge 80.
  • an edge-free transition from the inlet tube 62 into the outlet tube 64 is present at the inner angle region 82.
  • the flow deflection element 60 ' has a transition region 84 at the inner angle region 82 from the inlet tube 62 into the outlet tube 64, which provides an edge-free transition.
  • the flow diverting 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 flow diverting element 60 '(via flow guidance between inlet 66 and outlet 70) to a corresponding one
  • the flow diverting element 60 has a rectangular cross-sectional area at least outside the transition region 84 over its entire flow length.
  • the inlet tube 62 from the inlet 66 to the transition region 84 has the same cross-sectional area.
  • the outlet tube 64 has the same cross-sectional area from an outlet 70 to the transition region 84.
  • the cross-sectional area oriented on the inlet tube 62 perpendicular to the first axis 74 and oriented on the outlet tube 64 perpendicular to the second axis 76 is rectangular.
  • the (inner) cross-sectional area has a first depth Ti in a first depth direction 86 and a first width Bi in a first width direction 88 perpendicular to the first depth direction 86.
  • the first Depth direction 86 and the first width direction 88 are each oriented perpendicular to the first axis 74.
  • the outlet tube 64 has a second depth T 2 (outside the transition region 84) in a second depth direction 90 and a second depth T 2 in a second depth direction 90
  • Width direction 92 a second width B 2 .
  • the second depth direction 90 and the second width direction 92 are perpendicular to each other.
  • the second depth direction 90 and the second width direction 92 are oriented perpendicular to the second axis 76 of the outlet tube 64.
  • first width Bi and the second width B 2 have the same size (B).
  • first depth Ti and the second depth T 2 have the same size (T).
  • the first width direction 88 and the second width direction 92 are transversely and in particular perpendicular to each other.
  • the first depth direction 86 and the second depth direction 90 are parallel to each other.
  • the edge 80 which is oriented along the first depth direction 86 and along the second depth direction 90 (and thus transversely to the first width direction 88 and the second width direction 92), the depth
  • the width B 2 and the depth T 2 at the outlet 70 are in a certain relationship to one another, namely this particular ratio is at least 1.2: 1. (Due to the geometric configuration with the same rectangular cross-sectional area on the inlet tube 62 and the outlet pipe 64, this ratio also applies to the width Bi and the depth Ti.)
  • the flow diverting element 60 has a first wall 94a and a second wall 94b parallel to one another.
  • the first wall 94a and the second wall 94b are spaced apart in the depth directions 86 and 90, respectively.
  • the flow diverting element 60 ' is closed outside the inlet 66 and the outlet 70 by a first wall portion 96a and by a second wall portion 96b.
  • the first wall portion 96a connects the first wall 94a and the second wall 94b to the outer angle portion 78
  • the second wall portion 96b connects the first wall 94a and the second wall 94b to the inner angle portion 82.
  • the area of the rectangular cross-sectional area of both the inlet tube 62 and the outlet tube 64 outside the transition region 84 (and in particular at the inlet 66 and the outlet 70) is B 2 ⁇ T 2
  • the second wall region 96b is rounded off in relation to the depth direction 86 or 90 for edge-free formation.
  • a corresponding inner radius R (FIG. 5) of a bevel circle 100 on an outer side of the inner angle region 82 in the transition region 84 is greater than a half of the hydraulic diameter of the inlet tube 62 (outside the transition region 84), for example at the inlet 66.
  • the hydraulic diameter results as the Ratio of four times the cross-sectional area perpendicular to the main flow direction to the circumference of the cross-sectional area.
  • the inlet mouth 68 of the inlet tube 62 has a normal vector 102. This is in particular oriented parallel or antiparallel to the first axis 74.
  • the outlet port 72 has a normal vector 104. This is in particular oriented parallel or antiparallel to the second axis 76.
  • the first wall region 96a has a first partial region 106a on the inlet tube 62 and a second partial region 106b on the outlet tube 64.
  • the partial region 106a and the partial region 106b meet perpendicular to one another at the edge 80 with the depth D.
  • a depression 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 subregion 106b of the second wall region 96b has a first subregion 110a and a second subregion 110b.
  • the first sub-area 110a is adjacent to the outlet 70.
  • the second sub-area 110b is adjacent to the edge 80 and to the first sub-area 110a.
  • the first subregion 110a is oriented parallel to the second axis 76.
  • the first portion 106a of the second wall portion 96b is oriented parallel to the first axis 74.
  • the second subregion 110b of the second subregion 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 portion 106a of the second wall portion 96b (and thus the first axis 74) and the second sub-portion 110b is between 60 ° and 90 °.
  • this angle is 90 ° and the second sub-area 110b is parallel to the second axis 76, there is no Trough 108 is formed.
  • the trough is formed with a corresponding depth when the angle 112 is deviating from 90 °. In particular, it should not be less than 60 °. Through the trough 108, a sound well can be realized by which an effective noise reduction can be effected. Reference is made in this context to WO 2015/043641 Al.
  • 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 and the second channel 48, respectively.
  • 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 and the second channel 48, respectively.
  • the outlet tube 64 faces the pad 16. Exhaust air can be delivered to the surroundings of the suction device 10 directly or via a corresponding opening device via the corresponding outlet 70.
  • a flow deflecting element 60 "( Figure 6)
  • a first arm 113a with an inlet tube 114 and a second arm 113b with an outlet tube 116 which are oriented transversely and in particular perpendicularly to each other 116 transversely and in particular perpendicularly to one another.
  • the inlet tube 114 has a rectangular area 118.
  • the outlet tube 116 has a rectangular area 120.
  • the inlet pipe 114 has an inlet 119.
  • This has a rectangular cross section with a width Bi in the corresponding width direction and a depth Ti 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.
  • Adjoining the rectangular region 118 is a first transition region 122 of the first arm 113a, on which an input 124 is seated.
  • the entrance 124 has a non-rectangular cross-sectional area.
  • the first transition region 122 serves to provide a transition from the non-rectangular inlet 124, which has, for example, a circular mouth surface, to the rectangular region 118 with the inlet 119.
  • the transition is such that, in particular, the hydraulic cross-sectional area along the first transition region 122 remains at least approximately constant along an axis of the inlet pipe 114.
  • a second transition region 126 which opens into an outlet 128, adjoins the rectangular region 120 of the outlet tube 116.
  • the output 128 also has a non-rectangular cross-sectional area and the second transition area 126 correspondingly serves for the transition to the rectangular area 120.
  • the input 124 and the output 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, with the inlet 124 forming one end of the first arm 113a
  • the second arm 113b is formed by the outlet tube 116 and the second transition region 126.
  • the outlet 121 is spaced from the outlet 128, with the outlet 128 forming one end of the second arm 113.
  • the essential part of the flow deflection element 60 'for a sound attenuation is the area between the inlet tube 114 and the outlet tube 116.
  • the flow redirecting element 60 "does not have a trough and may be provided with such a trough
  • the flow diverting element 60 ' has a partial area, namely the rectangular cross-sectional area rectangular areas 118 and 120. At one end of these partial areas, the cross-sectional area has a surface area
  • the flow deflecting element 60 'or 60 can be used for example with the cleaning device 10 or in other applications.
  • the flow deflection element 60 or 60 'or 60 to be" flat "with respect to its depth T 2 at the outlet 70 or 121.
  • the width B 2 at 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 .
  • FIG. 7 shows measured values for flow deflection elements with the basic design as in FIG. 6 for different ratios B 2 to T 2 shown.
  • the transmission loss ⁇ in dB (A) is shown.
  • the transmission losses are shown on a negative scale. The more negative this value, the more effectively a noise reduction takes place when the corresponding flow deflection element 60 "flows through.
  • FIGS. 8 (a), (b), (c) the inlet pipe 114 and the outlet pipe 116 are indicated.
  • FIGS. 8 (a), (b), (c) differ in the frequency of the incoming sound wave. Shown is the course of a sound pressure 134 for different frequencies fi, f 2 , f 3 of the sound wave.
  • the incoming sound wave in the inlet tube excites at the transition into the outlet pipe 116 transverse modes.
  • the excitation and propagation of transverse modes depends on the frequency.
  • the generated transverse mode may propagate in the outlet tube 116.
  • the corresponding transverse mode can not propagate. It is stimulated, but can not escape. This is due to the geometric conditions in the formation of the flow deflection element 60 "in combination with the corresponding frequency f 2 .
  • the frequency f 2 is a type of maximum frequency at which just a cross mode can no longer propagate.
  • width B 2 is now chosen to be large for a given depth T 2, effective attenuation of the sound can be achieved due to the influence of the propagation of transverse modes.
  • FIG. 9 (a) a case is indicated with a first width B 2 .
  • This width B 2 is 5 cm for the flow deflection element 60 "in the example shown.
  • the suction unit 22 forms a noise source, which is a direct or indirect sound exciter.
  • this noise source is not mono-frequent, but has a frequency spectrum.
  • the flow deflecting elements 60 and 60 'and 60 "are to some extent transversely mounted in the sense that they have a
  • Flow deflection transversely to a guide plane of the guide means 30 on the region 33 and the first channel and the second channel 48 effect.
  • a main flow direction in the region 33 and in the channels 46, 48 is parallel to this plane.
  • the flow deflection elements 60, 60 ', 60 effect a flow deflection transversely and in particular perpendicular to the suction device 10.
  • a guide means 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 exterior space via an orifice device 142.
  • This channel 140 defines a curved guideway.
  • the channel 140 is fluidly connected to the suction assembly 138, i.e., an exhaust port thereof, via a flow redirecting member 60 (which may be formed as a flow redirecting member 60 'of the 60 ".)
  • the inlet tube opens 114 in the direction of the suction device 138 and the outlet pipe 116 opens into the channel 140.
  • the inlet 124 and the orifice 142 are at least approximately diametrically opposite each other. From the channel 140, air is then released (after noise reduction at the flow redirecting element 60).
  • a flow deflection element 60 is arranged upstream of the guide device 136, a plurality of flow deflection elements 60 and, for example, the orifice device 142 upstream of it.
  • the or the flow deflection elements 60 are connected more or less directly to a mouth device in the outer space.
  • the flow deflection elements 60 do not provide a flow deflection from the region 33 into the channels 46, 48. This is done by appropriate formation of these regions and channels.
  • the flow deflection element 60 is connected directly downstream of the suction device 138 and ensures a flow deflection in the region of the coupling of exhaust air into the guide device 136.
  • a cleaning device is a high-pressure cleaner 144 (FIG. 11).
  • Such 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 serves in particular for the guidance of cooling air.
  • a flow-deflecting element 60 is positioned on the air-guiding device 148, for example directly to the pump unit 146. This provides a flow deflection, for example, cooling air along a top 150 of a
  • Housing 152 can flow within the housing 152 in a channel 154 along.
  • the flow deflection element 60 ensures noise reduction, whereby a noise reduction of approximately 8 dB (A) can be achieved, in particular if the ratio of B to T is selected accordingly.
  • a flow deflection element 60 or 60 'or 60 is provided, which has rectangular regions, wherein the ratio of a width to a depth at a corresponding cross-sectional area at an outlet is greater than or at least 1.2
  • the physical effect of the high noise reduction by a "flat" flow redirecting element 60 is due to the excitation of transverse modes and prevention of the propagation of transverse modes in the outlet tube 64 and 116, respectively use of cleaning devices such as suction devices (stand-alone or, for example, used in vehicles), the corresponding "noise-loaded" air-guiding device may, for example, be a process air-guiding device. device or a cooling air guiding device.
  • the air guide device is, for example, a guide device for exhaust air. It may for example also be a guide device for cleaning air for filter cleaning.
  • the flow deflection element 60 is dimensioned so that the ratio of B 2 to T 2 at an outlet 70 is set for a given volume flow.
  • the volumetric flow rate defines the cross-sectional area at the inlet 66 and outlet 70.
  • the ratio of B 2 to T 2 is chosen so that the desired noise reduction results under functionally acceptable pressure drops.
  • the frequency spectrum of the noise source such as, for example, a suction device 22, may also be taken into account.
  • the cross-sectional areas at the respective inlets 66 and 119 and respective outlets 70 and 121, respectively, are equal and rectangular.
  • a first arm 202a is formed by an inlet tube 204.
  • a second arm 202b oriented perpendicular to the first arm 202a is formed by an outlet tube 206.
  • the inlet tube 204 has an inlet 208.
  • the outlet tube 206 has an outlet 210.
  • the inlet 208 has a rectangular cross-sectional area having a width Bi in a first width direction and a depth Ti 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 each other, as in the case of the flow deflection elements 60 ', 60 ".
  • the first width direction and the second width direction are perpendicular to each other, the depth Ti and the depth T 2 are equal and B 2 are different.
  • the width B 2 at the outlet is 210 g greater than the width Bi.
  • the flow deflection 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 embodiment of a flow redirecting element 212 (FIG. 13), in turn, includes an inlet tube 214 having an inlet 216 and a perpendicularly oriented outlet tube 218 having an outlet 220.
  • the cross-sectional areas at inlet 216 and outlet 220 are smooth. They are not exactly rectangular, but rounded at the rectangle corners.
  • a cross sectional area 222 at the outlet 220 (corresponding also to the A ⁇ let 216) has a Einhül loin 224, which is a rectangle, wherein t he sides of the rectangle T his Einhül lumbar 224, a width B 2 in a (second) width direction and a depth T 2 perpendicular thereto in a (second) depth direction.
  • Corresponding conditions also apply to the inlet 216.
  • the outlet tube 218 is dimensioned such that, based on the sleeve end 224, the ratio of the width B 2 to the depth T 2 is at least 1.2.
  • an inlet tube 232 having an inlet 234 and an outlet tube 236 oriented perpendicular thereto and having an outlet 238 are provided.
  • the inlet tube 232 and the outlet tube 236 have the same cross sectional area outside a transitional region between the inlet tube 232 and the outlet tube 236.
  • a cross section on the outlet tube 236 (and outlet tube 232) outside of such a transition region is oval shaped.
  • 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.
  • the inlet 234 is 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 redirecting element 250 (FIG. 15) includes an inlet tube 252 and an outlet tube 254. An inlet 256 is formed on the inlet pipe 252. At the outlet pipe 254, an outlet 258 is formed.
  • a cross-sectional area of the inlet pipe 252 and the outlet pipe 254 are equal outside 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 recumbent eight.
  • An envelope 260 of a cross-sectional area 262 at the outlet 258 is a rectangle of 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 the same design as the flow deflection elements 60 or 60 '. In particular, they may be provided with a trough corresponding to the trough 108. It is possible that transition regions may be connected to the respective inlet tubes and / or outlet tubes 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 Width B 2 to the depth T 2 is at least 1.2 in order to achieve an effective noise reduction.

Landscapes

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

Abstract

L'invention concerne un appareil de nettoyage comprenant au moins une source sonore (22) et un dispositif pour diriger l'air (28) muni d'au moins un élément déflecteur d'écoulement (60). Le ou les éléments déflecteurs d'écoulement présentent un premier bras (61a) avec un tuyau d'admission (62) et un second bras (61b) avec un tuyau d'échappement (64), le tuyau d'échappement (64) étant orienté transversalement au tuyau d'admission (62). Le tuyau d'admission (62) présente une admission (66) 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) présente une évacuation (70) ayant une profondeur (T2) dans un second sens de la profondeur (90) et une largeur (B2) dans un second sens de la largeur (92), le premier sens de la profondeur (86) et le second sens de la profondeur (90) étant orientés de manière parallèle l'un à l'autre et le premier sens de la largeur (88) et le second sens de la largeur (92) étant orientés de manière transversale l'un par rapport à l'autre, la largeur (B2) faisant 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)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/074501 WO2018068850A1 (fr) 2016-10-12 2016-10-12 Appareil de nettoyage et procédé de fabrication d'un appareil de nettoyage

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EP3525647B1 EP3525647B1 (fr) 2020-12-02

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Publication number Priority date Publication date Assignee Title
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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533370A (en) * 1982-03-30 1985-08-06 Sharp Kabushiki Kaisha Electric cleaner with minimum noise
US5697293A (en) * 1995-06-30 1997-12-16 Delta Neu (S.A.) Waste suction and storage device
DE102004005500A1 (de) * 2004-01-30 2005-08-18 Alfred Kärcher Gmbh & Co. Kg Staubsauger
JP4476705B2 (ja) 2004-06-10 2010-06-09 株式会社神戸製鋼所 消音機構
KR100607439B1 (ko) * 2004-08-23 2006-08-02 삼성광주전자 주식회사 사이클론 집진장치
KR100647195B1 (ko) * 2005-06-03 2006-11-23 삼성광주전자 주식회사 사이클론 집진장치
KR100802115B1 (ko) * 2006-12-07 2008-02-11 삼성광주전자 주식회사 팬 모터 케이스
KR100809738B1 (ko) * 2007-03-12 2008-03-06 삼성광주전자 주식회사 진공청소기
JP2009299635A (ja) * 2008-06-17 2009-12-24 Hitachi Appliances Inc 電動送風機及びそれを搭載した電気掃除機
EP2640250B1 (fr) * 2010-11-15 2016-07-27 Alfred Kärcher GmbH & Co. KG Appareil de nettoyage du sol roulant et insonorisé
EP2869744B1 (fr) * 2012-07-04 2016-08-31 Nilfisk A/S Dispositif de silencieux pour le moteur d'un aspirateur
EP3049677B1 (fr) * 2013-09-26 2022-09-07 Alfred Kärcher SE & Co. KG Appareil d'aspiration avec réflecteur de son

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EP3525647B1 (fr) 2020-12-02
CN109843134A (zh) 2019-06-04
CN109843134B (zh) 2021-03-30

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