Radial blower

Patent metadata

Field	Value
Publication number	US-9538889-B2
Application number	US-201313860214-A
Country	US
Kind code	B2
Filing date	Apr 10, 2013
Priority date	Apr 20, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A blower ( 1 ) with a blower housing ( 2 ), a blower wheel ( 4 ) positioned so as to rotate inside a blower housing ( 2 ), an electric motor ( 6 ) for the rotational drive of the blower wheel ( 4 ), as well as with a saucer-shaped attachment housing ( 8 ) positioned externally on the blower housing ( 2 ). The attachment housing ( 8 ) contains motor-control electronics ( 10 ) and exhibits in its connection area facing the blower housing ( 2 ) a metallic cover element ( 14 ) covering the motor control electronics ( 10 ) and protects against an electromagnetic radiation from the electric motor ( 6 ).

First claim

The invention claimed is:

1. A blower ( 1 ) comprising a blower housing ( 2 ), a blower wheel ( 4 ) positioned so as to rotate inside the blower housing ( 2 ), an electric motor ( 6 ) for the rotational drive of the blower wheel ( 4 ), a cupped-shaped attachment housing ( 8 ) positioned externally on the blower housing ( 2 ),
wherein the blower is a radial blower, wherein the blower wheel ( 4 ) is constructed as a radial blower wheel and the blower housing ( 2 ) is a spiral housing with a circumferential wall ( 34 ) enclosing the blower wheel ( 4 ), at least one axial inlet opening ( 36 ), and a tangential outlet opening ( 38 ),
wherein the attachment housing ( 8 ) contains motor-control electronics ( 10 ), the attachment housing ( 8 ) having, in a connection area facing the blower housing ( 2 ), a metallic cover element ( 14 ) which covers the motor control electronics ( 10 ) and protects the motor control electronics against electromagnetic radiation from the electric motor ( 6 ), wherein the cover element exhibits a ground connection, and
wherein the cover element ( 14 ) is constructed as a semiconductor-cooling element, wherein the cover element ( 14 ) forms at least one form-stamped contact area ( 28 ) sized and positioned for two-dimensional heat-conducting contact to a semiconductor component part ( 30 ) of the control electronics ( 10 ), wherein a heat-conducting layer ( 32 ) is positioned between the contact area ( 28 ) of the cover element ( 14 ) and the semiconductor component part ( 30 ), and wherein the cover element exhibits two such contact areas ( 28 ).

2. A blower according to claim 1 , wherein the cover element ( 14 ) is connected to the attachment housing ( 8 ) and the control electronics ( 10 ) to form a preassembled component group.

3. A blower according to claim 1 , wherein the cover element ( 14 ) forms at least two ground wire connections ( 22 , 26 ) positioned on opposite side areas of the cover element, to establish a grounding connection.

4. A blower according to claim 1 , wherein the attachment housing ( 8 ) consists of a plastic formed part, whereby the metallic cover element ( 14 ) functions as a mechanical stiffening element by means of its connection with the attachment housing ( 8 ).

5. A blower according to claim 1 wherein the circumferential wall ( 34 ) expands in a spiral manner from a smaller radius to a larger radius.

6. A blower according to claim 5 , wherein the attachment housing ( 8 ) is positioned in an area of the circumferential wall ( 34 ) wherein the smaller radius lies adjacent to the outlet opening ( 38 ).

7. A blower according to claim 1 , wherein the attachment housing ( 8 ) features an elongated shape with two opposite sides extending parallel to the rotation axis of the blower wheel ( 4 ) across substantially an entire width of the blower housing ( 2 ) in axial direction of the rotation axis.

8. A blower according to claim 1 , wherein the attachment housing ( 8 ) features an electrical connection element ( 40 , 42 ) in the area of two opposite faces, on one of the faces for external connection lines and on the other of the faces for the motor lines leading to the electric motor ( 6 ).

9. A blower according to claim 1 , wherein the attachment housing ( 8 ) viewed in a cross-section perpendicular to the rotation axis of the blower wheel ( 4 ) is constructed triangularly with two walls ( 44 , 46 ) approximately at a right angle to each other and an opening covered by the cover element ( 14 ).

10. A blower according to claim 1 , wherein the attachment housing ( 8 ) forms one side edge having retaining inserts ( 50 ) to engage in corresponding retaining openings of the blower housing ( 2 ) for an assembly connection with the blower housing ( 2 ), and screw holes ( 52 ) for retaining screws on an opposite side edge of the attachment housing.

11. A blower according to claim 1 further comprising the blower in the form of a double blower with the blower housing comprising separated first and second sections, wherein the electric motor ( 6 ) is positioned outside the blower housing ( 2 ) section and between the blower housing section and wherein the electric motor ( 6 ) is connected to two of the blower wheels ( 4 , 4 a ) via two axially opposite shafts on a common axis.

12. A blower according to claim 11 , wherein the electric motor ( 6 ) is hung on a carrier ( 54 ) between the two blower housing sections ( 2 , 2 a ).

13. A blower according to claim 1 , wherein the contact area ( 28 ) is positioned to be immediately adjacent the semiconductor component part ( 30 ).

14. A blower according to claim 1 , wherein the contact area ( 28 ) is in direct heat-conducting contact with the semiconductor component part ( 30 ).

15. A blower according to claim 1 , wherein the contact area ( 28 ) makes two-dimensional contact with the semiconductor component part ( 30 ).

16. A blower according to claim 1 , wherein the contact area ( 28 ) is spaced away from a remainder of the cover element ( 14 ).

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Riegler Peter
• Günther Jörg
• Heli Thomas
• Hofmann Walter

Classifications

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• A47L5/14 Primary

  cleaning by blowing-off, also combined with suction cleaning · CPC title

• F04D25/068

  Mechanical details of the pump control unit (pump control details F04D27/00) · CPC title

• F04D29/5813

  Cooling the control unit · CPC title