Vacuum cleaner and electric motor module thereof

Patent metadata

Field	Value
Publication number	US-11486282-B2
Application number	US-202016735565-A
Country	US
Kind code	B2
Filing date	Jan 6, 2020
Priority date	Jul 14, 2017
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A vacuum clear and an electric motor module ( 100 ) therefor are provided. The electric motor module ( 100 ) includes an outer casing ( 1 ) provided with an air inlet ( 10 ) at a front side thereof and an air outlet ( 11 ) at a rear side thereof; an electric motor assembly ( 2 ) arranged in the outer casing ( 1 ), and cooperating with the outer casing ( 1 ) to define an air passage in communication with the air inlet ( 10 ) and the air outlet ( 11 ); and a silencer ( 3 ) arranged at the air inlet ( 10 ), defining at least one resonant cavity therein, and the at least one resonant cavity having a side wall provided with a throat in communication with the resonant cavity.

First claim

What is claimed is:

1. An electric motor module for a vacuum cleaner, comprising:
an outer casing provided with an air inlet at a front side of the outer casing and an air outlet at a rear side of the outer casing;
an electric motor assembly arranged in the outer casing, and cooperating with the outer casing to define an air passage in communication with the air inlet and the air outlet; and
a silencer arranged at the air inlet, defining at least one resonant cavity in the silencer, and the least one resonant cavity having a side wall provided with a throat in communication with the resonant cavity.

2. The electric motor module according to claim 1 , wherein the silencer comprises an annular first silencing component, the first silencing component cooperates with the outer casing to define a first resonant cavity, one of an inner peripheral wall and an outer peripheral wall of the first silencing component is provided with a first throat in communication with the first resonant cavity.

3. The electric motor module according to claim 2 , wherein the silencer further comprises a second silencing component, the second silencing component is arranged at an inner side of the first silencing component, the second silencing component defines a second resonant cavity therein, and the second silencing component is provided with a second throat in communication with the second resonant cavity.

4. The electric motor module according to claim 3 , wherein the second silencing component is arranged on the inner peripheral wall of the first silencing component by means of a connecting assembly.

5. The electric motor module according to claim 4 , wherein the connecting assembly is formed in an annular structure, an inner peripheral wall and an outer peripheral wall of the connecting assembly are connected to the first silencing component and the second silencing component respectively by means of a plurality of connecting sheets spaced apart from each other.

6. The electric motor module according to claim 3 , wherein the second silencing component comprises a front end face, a rear end face, and an annular side plate, a front end and a rear end of the side plate are connected to the front end face and the rear end face respectively to define the second resonant cavity, and the side plate is provided with the second throat.

7. The electric motor module according to claim 2 , wherein the outer peripheral wall of the first silencing component is in contact with an inner wall of the air inlet, and the first throat is arranged on the inner peripheral wall of the first silencing component.

8. The electric motor module according to claim 7 , wherein a longitudinal section of the inner peripheral wall of the first silencing component is a bevel obliquely extending inwards and backwards.

9. The electric motor module according to claim 1 , wherein the air passage comprises a noise reduction passage in the electric motor assembly.

10. The electric motor module according to claim 9 , wherein a part of the air passage located between the air inlet and an inlet of the noise reduction passage has a gradually reduced passage area, in a direction from the air inlet to the air outlet.

11. The electric motor module according to claim 1 , wherein a noise-absorbing material is arranged in the resonant cavity.

12. The electric motor module according to claim 1 , wherein a plurality of resonant cavities are provided and configured to eliminate noises of different frequencies.

13. A vacuum cleaner, comprising the electric motor module according to claim 1 .

Assignees

• Midea Group Co Ltd

Inventors

• Ming Lele
• Zhang Hui
• Hu Xiaowen
• Li Shuqi
• Yang Zhu

Classifications

• A47L7/0085

  adapted for special purposes not related to cleaning · CPC title

• F01N13/002

  Apparatus adapted for particular uses, e.g. for portable devices driven by machines or engines · CPC title

• A47L9/28 Primary

  Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means · CPC title

• F01N1/04 Primary

  having sound-absorbing materials in resonance chambers · CPC title

• F01N1/023

  Helmholtz resonators · CPC title