Suction device with sound mirror device

Patent metadata

Field	Value
Publication number	US-2016201691-A1
Application number	US-201615079292-A
Country	US
Kind code	A1
Filing date	Mar 24, 2016
Priority date	Sep 26, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A suction device is provided which includes a fan device for generating a suction air flow and an air conveying device having at least one flow deflection element comprising an inlet tube and an outlet tube, wherein the outlet tube is oriented transversely to the inlet tube, and wherein in a transitional area between the inlet tube and the outlet tube there is arranged a sound mirror device, which at least one of (i) reflects and (ii) absorbs sound.

First claim

1 . A suction device comprising:
a fan device for generating a suction air flow; and an air conveying device having at least one flow deflection element comprising an inlet tube and an outlet tube; wherein the outlet tube is oriented transversely to the inlet tube; and wherein in a transitional area between the inlet tube and the outlet tube there is arranged a sound mirror device, which at least one of (i) reflects and (ii) absorbs sound.

2 . The suction device as claimed in claim 1 , wherein the mirror sound device has a wall structure that reflects sound.

3 . The suction device as claimed in claim 2 , wherein at least one of (i) the wall structure is oriented such that a reflection direction is oriented toward an inlet of the inlet tube, and (ii) the wall structure is oriented such that a multiple sound reflection occurs within the at least one flow deflection element.

4 . The suction device as claimed in claim 2 , wherein the wall structure comprises a first wall arranged opposite the inlet.

5 . The suction device as claimed in claim 4 , wherein a trough is formed in the transitional area by means of the first wall.

6 . The suction device as claimed in claim 4 , wherein the first wall is at least approximately flat.

7 . The suction device as claimed in claim 4 , wherein the first wall is oriented parallel to an inlet opening of the inlet or is oriented at a small acute angle less than 30° relative to the inlet opening.

8 . The suction device as claimed in claim 4 , wherein the first wall is oriented transversely to an outlet opening of an outlet.

9 . The suction device as claimed in claim 4 , wherein the first wall lies parallel or at an obtuse angle of at least 150° to the outlet tube.

10 . The suction device as claimed in claim 4 , wherein the wall structure comprises a second wall, which is oriented transversely to the first wall and adjoins the first wall toward the inlet of the inlet tube.

11 . The suction device as claimed in claim 10 , wherein the second wall is an extension of the inlet tube to the first wall.

12 . The suction device as claimed in claim 10 , wherein the second wall is at least approximately flat.

13 . The suction device as claimed in claim 4 , wherein the wall structure has a third wall, which is arranged opposite the first wall and connects the inlet tube to the outlet tube, wherein the third wall is curved.

14 . The suction device as claimed in claim 13 , wherein an inner radius (R) of the third wall is greater than half the hydraulic diameter of the inlet tube.

15 . The suction device as claimed in claim 1 , wherein a cross-sectional area of the at least one flow deflection element is greater at the sound mirror device than at at least one of an inlet and an outlet.

16 . The suction device as claimed in claim 1 , wherein a cross-sectional area of the inlet tube increases from an inlet toward the sound mirror device.

17 . The suction device as claimed in claim 1 , wherein a cross-sectional area of the outlet tube decreases away from the sound mirror device toward an outlet.

18 . The suction device as claimed in claim 1 , wherein the inlet tube has a first central longitudinal axis and the outlet tube has a second central longitudinal axis, and wherein the first central longitudinal axis and the second central longitudinal axis intersect one another at a point of intersection, which lies in the transitional area within the at least one flow deflection element.

19 . The suction device as claimed in claim 18 , wherein the point of intersection lies between an inlet and a first wall of the sound mirror device.

20 . The suction device as claimed in claim 18 , wherein the point of intersection lies between a second wall of the sound mirror device and an outlet.

21 . The suction device as claimed in claim 18 , wherein the first central longitudinal axis and the second central longitudinal axis lie at an angle of at least 30° to one another.

22 . The suction device as claimed in claim 21 , wherein the first central longitudinal axis and the second central longitudinal axis lie at an angle in the range between 80° and 100° to one another.

23 . The suction device as claimed in claim 1 , wherein a sound-permeable flow guiding device is arranged on the sound mirror device.

24 . The suction device as claimed in claim 1 , wherein the at least one flow deflection element is part of a bend.

25 . The suction device as claimed in claim 24 , wherein the bend surrounds a fan of the fan device.

26 . The suction device as claimed in claim 1 , wherein the air conveying device is fluidically connected to the fan device.

27 . The suction device as claimed in claim 26 , wherein the air conveying device is configured at least one of (i) to discharge suction air, (ii) to feed suction air, (iii) to discharge cooling air and (iv) to feed cooling air.

28 . The suction device as claimed in claim 1 , said suction device being configured as a dry vacuum cleaner, or as a wet vacuum cleaner, or as a wet-dry vacuum cleaner, or as a spray extraction appliance.

29 . The suction device as claimed in claim 1 , wherein an outlet of the outlet tube is arranged on a housing of the suction device or is fluidically connected to a housing outlet.

Assignees

• Kaercher Gmbh & Co Kg Alfred

Inventors

• Ebert Florian
• Bensing Felix
• Junker Sebastian

Classifications

• F04D29/663

  Sound attenuation · CPC title

• A47L9/0081

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

• F04D29/422

  Discharge tongues (F04D17/04 takes precedence) · CPC title

• F04D17/16

  for displacing without appreciable compression · CPC title

• F04D29/441 Primary

  especially adapted for elastic fluid pumps · CPC title