Vortex finder for a cyclonic separator

Patent metadata

Field	Value
Publication number	US-12496593-B2
Application number	US-202017791894-A
Country	US
Kind code	B2
Filing date	Dec 29, 2020
Priority date	Jan 9, 2020
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

The invention describes a vortex finder for a cyclonic separator. The vortex finder includes a plurality of stationary vanes around which incoming air is guided into the vortex finder, in which a side of the vanes facing the incoming air is provided with a protrusion at a stagnation point. The protrusion is shaped so as to guide the incoming air into the vortex finder, and have a concave side following a shape of a neighboring vane, and a rounded top. Further, the protrusion has a height in a range between 70% and 130%, and in a range between 85% and 115% of a gap width between the vanes. The gap width between adjacent vanes increases from an outside to an inside of the vortex finder. A vacuum cleaner that includes a cyclonic separator has such a vortex finder.

First claim

The invention claimed is:

1 . A vortex finder for a cyclonic separator, the vortex finder comprising:
a plurality of stationary vanes around which incoming air is guided into the vortex finder, wherein a side of the plurality of stationary vanes facing the incoming air is provided with a protrusion at a stagnation point, wherein sides of the protrusion facing outside of the vortex finder are convex, wherein sides of the protrusion facing into the vortex finder are concave, and wherein the stationary vanes are in a shape of an airfoil, each stationary vane having a tip extending toward a center of the vortex finder.

2 . The vortex finder of claim 1 , wherein the protrusion is shaped so as to guide the incoming air into the vortex finder.

3 . The vortex finder of claim 1 , wherein the protrusion has a concave side following a shape of a neighboring vane.

4 . The vortex finder of claim 1 , wherein the protrusion has a rounded top.

5 . The vortex finder of claim 1 , wherein the protrusion has a height in a range between 70% and 130% of a gap width between the plurality of stationary vanes.

6 . The vortex finder of claim 5 , wherein the protrusion has the height in a range between 85% and 115% of the gap width between the plurality of stationary vanes.

7 . The vortex finder of claim 1 , wherein a gap width between adjacent vanes of the plurality of stationary vanes increases from an outside to an inside of the vortex finder.

8 . The vortex finder of claim 1 , wherein a vacuum cleaner comprising a cyclonic separator includes the vortex finder.

9 . The vortex finder of claim 1 , wherein the concave sides of the protrusions are shaped such that there is a continuous curve from basic shape of a vane of the plurality of stationary vanes towards top of the protrusion.

Assignees

• Koninklijke Philips Nv
• Versuni Holding Bv

Inventors

• Van Der Kooi Johannes Tseard
• Koopmans Emiel

Classifications

• B04C2005/136

  Baffles in the vortex finder · CPC title

• A47L9/16

  Arrangement or disposition of cyclones or other devices with centrifugal action · CPC title

• A47L9/1658 Primary

  Construction of outlets · CPC title

• B04C5/13 Primary

  formed as a vortex finder and extending into the vortex chamber {(exits with bulkheads preventing reverse flow vortex B04C3/00)}; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow · CPC title