Suction device and method for operating a suction device

Patent metadata

Field	Value
Publication number	US-10376113-B2
Application number	US-201715646783-A
Country	US
Kind code	B2
Filing date	Jul 11, 2017
Priority date	Jan 13, 2015
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

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, which cleaning device comprises an external-air valve device, and at least one guide duct for air, which at least one guide duct has a first port which is connected in terms of fluid action to the cleaning device for the provision of external air from the at least one guide duct, a second port for the coupling of exhaust air of the suction apparatus into the at least one guide duct, and a third port which is connected in terms of fluid action to the surroundings of the suction unit, wherein air from the surroundings is configured to flow into the at least one guide duct via the third port.

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;
a cleaning device for the filter device, which cleaning device comprises an external-air valve device; and
at least one guide duct for air, which at least one guide duct has a first port which is connected in terms of fluid action to the cleaning device for the provision of external air from the at least one guide duct, a second port for the coupling of exhaust air of the suction apparatus into the at least one guide duct, and a third port which is connected in terms of fluid action to the surroundings of the suction unit;
wherein air from the surroundings is configured to flow into the at least one guide duct via the third port.

2. The suction unit as claimed in claim 1 , wherein the third port is formed such that exhaust air of the suction apparatus is configured to emerge into the surroundings at said third port.

3. The suction unit as claimed in claim 1 , wherein the at least one guide duct extends between the second port and the third port.

4. The suction unit as claimed in claim 1 , wherein the first port is, at least one of (i) with regard to flow guidance and (ii) geometrically, positioned between the second port and the third port.

5. The suction unit as claimed in claim 1 , wherein the at least one guide duct has a first region which has a first extent axis and on which the second port is situated, a second region which has a second extent axis and on which the first port is situated, and a third region which has a third extent axis and on which the third port is situated, wherein at least one of the first extent axis and the third extent axis is oriented transversely with respect to the second extent axis.

6. The suction unit as claimed in claim 5 , wherein at least one of the first region and the third region is arranged laterally adjacent to the cleaning device or filter device.

7. The suction unit as claimed in claim 1 , wherein the at least one guide duct is arranged or formed at least partially on a housing region which covers at least one of the dirt collection container and the filter device and the cleaning device.

8. The suction unit as claimed in claim 1 , wherein the at least one guide duct and the second port are formed such that the entirety of the exhaust air of the suction apparatus enters the at least one guide duct.

9. The suction unit as claimed in claim 8 , wherein the at least one guide duct and the third port are formed such that, outside a cleaning process of the filter device, exhaust air of the suction apparatus is configured to emerge into the surroundings only at the third port.

10. The suction unit as claimed in claim 8 , comprising a first inflow region for air to the first port, which first inflow region is formed between the second port and the first port, and a second inflow region which is formed between the third port and the first port.

11. The suction unit as claimed in claim 1 , wherein a fourth port for exhaust air of the suction apparatus is arranged on the at least one guide duct.

12. The suction unit as claimed in claim 11 , wherein a fifth port to the surroundings is arranged on the at least one guide duct.

13. The suction unit as claimed in claim 12 , wherein at least one of the filter device and the cleaning device is positioned geometrically between the third port and the fifth port.

14. The suction unit as claimed in claim 12 , wherein the third port and the fifth port are positioned on opposite housing sides.

15. The suction unit as claimed in claim 11 , wherein at least one of the filter device and the cleaning device is positioned geometrically between the second port and the fourth port.

16. The suction unit as claimed in claim 12 , wherein the at least one guide duct is formed mirror-symmetrically with respect to at least one of (i) the third port and fifth port and (ii) the second port and the fourth port.

17. The suction unit as claimed in claim 12 , having a mirror-symmetrical flow guidance for the air guidance to the first port.

18. The suction unit as claimed in claim 12 , wherein the fifth port is situated on the same housing side region as the second port, and the fourth port is arranged on the same housing side region as the third port.

19. The suction unit as claimed in claim 12 , comprising a first inflow region for air to the first port, which first inflow region is formed between the second port and the first port, a second inflow region which is formed between the third port and the first port, a third inflow region which is formed between the fourth port and the first port, and a fourth inflow region which is formed between the fifth port and the first port.

20. The suction unit as claimed in claim 1 , wherein at least one perforated-plate resonator is acoustically 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.

21. The suction unit as claimed in claim 20 , 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 a 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.

22. The suction unit as claimed in claim 20 , wherein the at least one perforated-plate resonator is arranged with the at least one perforated plate opposite the cleaning device.

23. The suction unit as claimed in claim 20 , wherein the at least one perforated plate is arranged on the chamber wall.

24. The suction unit as claimed in claim 20 , 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.

25. The suction unit as claimed in claim 24 , wherein at least one of the first side and the second side is of planar form.

26. The suction unit as claimed in claim 24 , wherein the first side and the second side are parallel to one another.

27. The suction unit as claimed in claim 24 , wherein the openings, on the first side, open into the chamber space and, on the second side, face toward the first port.

28. The suction unit as claimed in claim 27 , wherein the openings, on the second side, open into the at least one guide duct.

29. The suction unit as claimed in claim 20 , wherein the chamber wall has a top wall, which is situated opposite the at least one perforated plate, and a wall which is situated between the top wall and the at least one perforated plate.

30. The suction unit as claimed in claim 29 , wherein the at least one perforated plate and the top wall are oriented parallel.

31. The suction unit as claimed in claim 20 , wherein the at least one perforated plate is of non-planar form, and in particular has a first regio

Assignees

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

Inventors

• Peflof Gábor
• Seibold Andreas
• Ebert Florian
• Frank Juergen

Classifications

• F16K17/042

  with locking or disconnecting arrangements · CPC title

• A47L9/2884

  Details of arrangements of batteries or their installation · CPC title

• F16K31/0655

  Lift valves · CPC title

• A47L9/0081 Primary

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

• A47L9/20

  Means for cleaning filters · CPC title