Negative ion generating device and air purifier

Patent metadata

Field	Value
Publication number	US-12337333-B2
Application number	US-202217874179-A
Country	US
Kind code	B2
Filing date	Jul 26, 2022
Priority date	Apr 25, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

The present disclosure relates to a negative ion generating device and an air purifier. The negative ion generating device includes a housing, a negative ion assembly, and a cleaning assembly. The negative ion assembly is arranged to the housing, and the negative ion assembly includes a conductive fiber brush. The cleaning assembly is arranged to the housing, the cleaning assembly includes a driving mechanism and a cleaning member, and the cleaning member can move under action of the power provided by the driving mechanism, and contact or separate from the conductive fiber brush during movement.

First claim

What is claimed is:

1. A negative ion generating device, comprising:
a housing;
a negative ion assembly disposed in the housing, the negative ion assembly being configured to produce a negative ion, the negative ion assembly comprising a conductive fiber brush; and
a cleaning assembly disposed in the housing, the cleaning assembly comprising a driving mechanism and a cleaning member coupled to a power output end of the driving mechanism, the driving mechanism being configured to provide power, the cleaning member being configured to move under action of the power provided by the driving mechanism, and contact or separate from the conductive fiber brush during movement,
wherein the conductive fiber brush is disposed along a circumferential edge of the housing; and
the cleaning member is configured to rotate clockwise or counterclockwise around an edge of the housing in a horizontal direction under action of the power provided by the driving mechanism, and contact and separate from the conductive fiber brush during rotation.

2. The negative ion generating device according to claim 1 , wherein
the conductive fiber brush is made of an elastic material:
the conductive fiber brush is elastically deformed during contact with the cleaning member; and
the conductive fiber brush restores to an original shape due to elasticity after separation from the cleaning member.

3. The negative ion generating device according to claim 1 , wherein
the cleaning member comprises a rotation coupling part, a first cantilever and a second cantilever;
the rotation coupling part is arranged at an upper surface of the housing and rotatably coupled to the housing;
the first cantilever and the second cantilever are symmetrically arranged at two opposite ends of the rotation coupling part; and
each of the first cantilever and the second cantilever comprises a first end coupled to the rotation coupling part and a second end provided with a cleaning part capable of contacting or separating from the conductive fiber brush during rotation.

4. The negative ion generating device according to claim 3 , wherein
the upper surface of the housing comprises a limiting post, and the limiting post is fixedly attached on the upper surface of the housing;
the rotation coupling part defines a limiting hole; and
the limiting hole is configured to fit over the limiting post and cooperate with the limiting post to achieve limit of the cleaning part in a rotation state.

5. The negative ion generating device according to claim 4 , wherein
two limiting holes are provided, two limiting posts are provided; and
the two limiting holes are symmetrically arranged at two sides of a center of the rotation coupling part.

6. The negative ion generating device according to claim 4 , wherein
the upper surface of the housing has a curvature with a high center and a low edge;
each of the first cantilever and the second cantilever has a curved plate shape matching the curvature of the upper surface of the housing; and
the limiting hole has a curved shape.

7. The negative ion generating device according to claim 3 , wherein
the cleaning member takes a center of the rotation coupling part as a center of rotation, and is configured to rotate clockwise or counterclockwise under action of the driving mechanism.

8. The negative ion generating device according to claim 7 , wherein
an axis where a center of the cleaning member is located coincides with an axis where a center of the housing is located.

9. The negative ion generating device according to claim 8 , wherein
a distance between the axis where the center of the housing is located and a tip of the conductive fiber brush is a first distance;
a distance between the axis where the center of the housing is located and the cleaning part is a second distance; and
the first distance is greater than the second distance.

10. The negative ion generating device according to claim 1 , wherein
the negative ion assembly further comprises a negative ion circuit board electrically coupled to the conductive fiber brush; and
the negative ion circuit board is fixed to a lower surface or an inner cavity of the housing.

11. The negative ion generating device according to claim 10 , wherein
a circumferential edge of the housing is provided with a protruding rib protruding from the lower surface;
the protruding rib defines a brush through hole or a brush groove; and
the conductive fiber brush is inserted into the brush through hole or the brush groove.

12. The negative ion generating device according to claim 11 , wherein
a plurality of brush through holes or brush grooves are provided;
a number of the conductive fiber brushes matches the brush through holes or the brush grooves;
the plurality of brush through holes or the plurality of brush grooves are spaced apart in a circumferential direction of the housing; and
a plurality of the conductive fiber brushes correspond to the plurality of brush through holes or the plurality of brush grooves in arrangement position.

13. The negative ion generating device according to claim 1 , wherein
the driving mechanism comprises a motor having a rotating shaft;
a center of the housing defines a first motor through hole;
a center of the cleaning member defines a second motor through hole;
the motor is fixed to the housing; and
the rotating shaft passes through the first motor through hole and the motor through hole sequentially to fixedly couple to the cleaning member, to drive the cleaning member to rotate synchronously.

14. The negative ion generating device according to claim 1 , wherein
the cleaning member defines a through hole or a notch at a position corresponding to the conductive fiber brush.

15. The negative ion generating device according to claim 14 , wherein
the through hole has a size greater than an outer diameter of the conductive fiber brush.

16. The negative ion generating device according to claim 14 , wherein
a plurality of through holes are provided, and the plurality of through holes are arranged side by side and spaced apart.

17. An air purifier, comprising:
a negative ion generating device, comprising:
a housing;
a negative ion assembly disposed in the housing, the negative ion assembly being configured to produce a negative ion, the negative ion assembly comprising a conductive fiber brush; and
a cleaning assembly disposed in the housing, the cleaning assembly comprising a driving mechanism and a cleaning member coupled to a power output end of the driving mechanism, the driving mechanism being configured to provide power, the cleaning member configured to move under action of the power provided by the driving mechanism, and contact or separate from the conductive fiber brush during movement; and
a bracket, the negative ion generating device being fixed through the bracket,
wherein the conductive fiber brush is disposed along a circumferential edge of the housing; and
the cleaning member is configured to rotate clockwise or counterclockwise around an edge of the housing in a horizontal direction under action of the power provided by the driving mechanism, and contact and separate from the conductive fiber brush during rotation.

18. The air purifier according to claim 17 , wherein
the air purifier further comprises a fan, the fan is rotatable to form a wind path in the air purifier, and the negative ion generating device is arranged in the wind path or outside the wind path.

19. The air purifier according to claim 17 , wherein
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Assignees

• Beijing Xiaomi Mobile Software Co Ltd
• Beijing Smartmi Tech Co Ltd

Inventors

• Zhu Kenan
• Jia Lei
• Xi Guang

Classifications

• B08B1/165

  Scrapers · CPC title

• B08B1/30

  by movement of cleaning members over a surface · CPC title

• H01T23/00 Primary

  Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere · CPC title

• B03C2201/10

  Ionising electrode with two or more serrated ends or sides · CPC title

• B03C3/41

  Ionising-electrodes · CPC title