Suction device

Patent metadata

Field	Value
Publication number	US-10426305-B2
Application number	US-201715646763-A
Country	US
Kind code	B2
Filing date	Jul 11, 2017
Priority date	Jan 13, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A suction unit is proposed which comprises a suction apparatus, a dirt collection container, a filter device, wherein the dirt collection container is connected in terms of flow via the filter device to the suction apparatus, and a cleaning device for the filter device, wherein the cleaning device forms a noise source for noise emissions in a frequency range below 2000 Hz, and wherein at least one perforated-plate resonator is associated with the cleaning device, wherein the at least one perforated-plate resonator has a chamber with a chamber space and with a chamber wall and has at least one perforated plate which covers the chamber space, and wherein the at least one perforated plate is connected, actively with respect to sound, to the cleaning device.

First claim

The invention claimed is:

1. A suction unit comprising:
a suction apparatus;
a dirt collection container;
a filter device, wherein the dirt collection container is connected in terms of flow via the filter device to the suction apparatus; and
a cleaning device for the filter device, wherein the cleaning device forms a noise source for noise emissions in a frequency range below 2000 Hz; and
wherein at least one perforated-plate resonator is associated with the cleaning device, wherein the at least one perforated-plate resonator has a chamber with a chamber space and with a chamber wall and has at least one perforated plate which covers the chamber space; and
wherein the at least one perforated plate is connected, actively with respect to sound, to the cleaning device.

2. The suction unit as claimed in claim 1 , wherein the at least one perforated-plate resonator is, with respect to geometric dimensions and arrangement and form of openings in the at least one perforated plate, dimensioned with respect to the at least one noise source such that a noise reduction at the maximum level of at least 2.5 dB is realized by means of the at least one perforated-plate resonator.

3. The suction unit as claimed in claim 1 , wherein the cleaning device comprises an external-air valve device.

4. The suction unit as claimed in claim 1 , wherein the at least one noise source generates noises owing to a pressure change.

5. The suction unit as claimed in claim 4 , wherein the noise source generates banging noises.

6. The suction unit as claimed in claim 1 , wherein the at least one perforated-plate resonator is arranged with the at least one perforated plate opposite the cleaning device.

7. The suction unit as claimed in claim 1 , wherein the at least one perforated plate is arranged on the chamber wall.

8. The suction unit as claimed in claim 1 , wherein the at least one perforated plate of the at least one perforated-plate resonator has a first side, which faces toward the chamber space, and a second side, which is situated opposite the first side, wherein a multiplicity of openings is provided in the at least one perforated plate, which openings extend continuously between the first side and the second side.

9. The suction unit as claimed in claim 8 , wherein at least one of the first side and the second side is of planar form.

10. The suction unit as claimed in claim 8 , wherein the first side and the second side are parallel to one another.

11. The suction unit as claimed in claim 8 , wherein the openings, on the first side, open into the chamber space and, on the second side, face toward the at least one noise source.

12. The suction unit as claimed in claim 11 , wherein the openings, on the second side, open into a duct which is connected, actively in terms of sound, to the at least one noise source.

13. The suction unit as claimed in claim 1 , comprising at least one sound-conducting duct which leads from the at least one noise source to the at least one perforated plate.

14. The suction unit as claimed in claim 1 , wherein the at least one perforated plate forms an enclosure within which the at least one noise source is arranged.

15. The suction unit as claimed in claim 14 , wherein the chamber wall of the at least one perforated-plate resonator at least partially forms a housing wall of the cleaning unit.

16. The suction unit as claimed in claim 1 , wherein the chamber wall has a top wall, which is situated opposite the at least one perforated plate, and has a wall which is situated between the top wall and the at least one perforated plate.

17. The suction unit as claimed in claim 16 , wherein the at least one perforated plate and the top wall are oriented parallel.

18. The suction unit as claimed in claim 1 , wherein the chamber space has a (hollow) cuboidal shape.

19. The suction unit as claimed in claim 1 , wherein the chamber wall has a first transverse wall, a second transverse wall, a first longitudinal wall, a second longitudinal wall and a top wall, wherein the first transverse wall and the second transverse wall are spaced apart and face one another, the first longitudinal wall and the second longitudinal wall are spaced apart from one another and face one another, the first transverse wall and the first longitudinal wall are oriented transversely with respect to one another, and the top wall is oriented transversely with respect to the first transverse wall, the second transverse wall, the first longitudinal wall and the second longitudinal wall.

20. The suction unit as claimed in claim 19 , wherein at least one of (i) the first transverse wall and the second transverse wall are oriented parallel, and (ii) the first longitudinal wall and the second longitudinal wall are oriented parallel.

21. The suction unit as claimed in claim 1 , wherein the chamber wall is produced at least partially from an acoustically hard material.

22. The suction unit as claimed in claim 1 , wherein a sound absorption material is arranged in at least part of the chamber space.

Assignees

• Kaercher Gmbh & Co Kg Alfred
• Kaercher Alfred Se & Co Kg

Inventors

• Ebert Florian
• Bensing Felix
• Jetter Simon
• Peflof Gábor
• Scholl Dominik

Classifications

• A47L9/00 Primary

  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 · CPC title

• A47L9/20

  Means for cleaning filters · CPC title

• A47L9/0081 Primary

  Means for exhaust-air diffusion; Means for sound or vibration damping · CPC title

• A47L9/10 Primary

  Filters (in general B01D; cyclones B04C); Dust separators; Dust removal; Automatic exchange of filters {(for machines for cleaning floors A47L11/40)} · CPC title