Centrifugal Air Purifier with Enhanced Air Flow Arrangement

Patent metadata

Field	Value
Publication number	US-2024318844-A1
Application number	US-202318396694-A
Country	US
Kind code	A1
Filing date	Dec 26, 2023
Priority date	Mar 21, 2023
Publication date	Sep 26, 2024
Grant date	—

Abstract

An air purifier includes a main housing, a driving motor, a centrifugal fan, and an enhanced air flow arrangement. The main housing has an air inlet, an air outlet, an air duct inner wall, and an air duct outer wall to define an air flow channel communicating between the air inlet and the air outlet, the air duct outer wall having a curved extension portion and a vertical extension portion. The enhanced air flow arrangement includes a plurality of air guiding panels inclinedly and spacedly extending from the vertical extension portion of the air duct outer wall toward the air flow channel, an angle of inclination of each of the air guiding panels is an acute angle with respect to horizontal.

First claim

What is claimed is:

1 . A centrifugal air purifier, comprising:
a main housing having an air inlet, an air outlet, an air duct inner wall, and an air duct outer wall to define an air flow channel communicating between the air inlet and the air outlet, the air duct outer wall having a curved extension portion and a vertical extension portion; a driving motor mounted in the main housing; a centrifugal fan; and an enhanced air flow arrangement, which comprises a plurality of air guiding panels inclinedly and spacedly extending from the vertical extension portion of the air duct outer wall toward the air flow channel, an angle of inclination of each of the air guiding panels is an acute angle with respect to horizontal.

2 . The centrifugal air purifier, as recited in claim 1 , wherein the curved extension portion of the air duct outer wall extends from the air inlet while the vertical extension portion of the air duct outer wall extends from the curved extension portion toward the air outlet, at least a portion of the curved extension portion being opposite to the vertical extension portion, air being arranged to be driven to travel from the air inlet, and sequentially pass through the curved extension portion, the vertical extension portion, and the air outlet.

3 . The centrifugal air purifier, as recited in claim 1 , wherein the air duct inner wall and the curved extension portion of the air duct outer wall is concentrically arranged with respect to the driving motor and the centrifugal fan.

4 . The centrifugal air purifier, as recited in claim 1 , wherein the intersection between the vertical extension portion and the curved extension portion is positioned above a center of radius of the curved extension portion.

5 . The centrifugal air purifier, as recited in claim 4 , wherein a vertical distance between the intersection between the vertical extension portion and the curved extension portion is 0 mm to 20 mm.

6 . The centrifugal air purifier, as recited in claim 1 , wherein each of the air guiding panels has a first end connected to the vertical extension portion, and a second end extending from the first end toward the air flow channel so as to optimally reduce a cross sectional area of the air outlet for increasing a pressure of the air flowing through the air outlet.

7 . The centrifugal air purifier, as recited in claim 1 , wherein an angle of inclination between each air guiding panel with respect to the horizontal gradually increases from the lowest air guiding panel to the uppermost air guiding panel along the vertical extension portion.

8 . The centrifugal air purifier, as recited in claim 1 , wherein a difference of the angle of inclination with respect to horizontal for each two adjacent air guiding panels is greater than 0 degree and less than 10 degrees.

9 . The centrifugal air purifier, as recited in claim 1 , wherein an image projection of each of the air guiding panels on the vertical extension portion are interconnected so as to ensure a vertical distance between the first ends of two adjacent air guiding panels is within a predetermined distance for ensuring each of the air guiding panels gradually increases the air pressure as air flowing toward the air outlet.

10 . The centrifugal air purifier, as recited in claim 6 , wherein the second end of the uppermost air guiding panel extends to the top wall at the top of the air outlet.

11 . The centrifugal air purifier, as recited in claim 1 , wherein the enhanced air flow arrangement further comprises a volute which comprises a volute tongue provided in the main housing and extended from the air duct outer wall towards the air outlet, the volute tongue being upwardly inclinedly extend from a top end of the curved extension portion of the air duct outer wall in a direction away from the air guiding panels, the volute tongue and the air guiding panels being provided on two opposite sides of the air outlet respectively.

12 . The centrifugal air purifier, as recited in claim 11 , wherein a sum of angle of inclination of the volute tongue with respect to vertical and the angle of inclination of the uppermost air guiding panel with respect to horizontal is in a range between 90 degrees and 120 degrees.

13 . The centrifugal air purifier, as recited in claim 12 , wherein the volute further comprises a volute center connected to the volute tongue, wherein the angle of inclination of the volute tongue with respect to horizontal is greater than an angle of inclination between an imaginary vertical line passing through the volute center and an imaginary tangent line extending from the air duct inner wall by 5 degrees to 10 degrees.

14 . The centrifugal air purifier, as recited in claim 13 , wherein a vertical distance between the first end of the lowest air guiding panel and the volute center is approximately zero.

15 . A centrifugal air duct, comprising:
an air inlet; an air outlet; an air duct inner wall and an air duct outer wall to define an air flow channel communicating between the air inlet and the air outlet, the air duct outer wall having a curved extension portion and a vertical extension portion; and an enhanced air flow arrangement, which comprises a plurality of air guiding panels inclinedly and spacedly extending from the vertical extension portion of the air duct outer wall toward the air flow channel, an angle of inclination of each of the air guiding panels is an acute angle with respect to horizontal.

Assignees

• Shenzhen Chenbei Tech Co Ltd

Inventors

• Tang Yu
• Li Zongquan

Classifications

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title

• F04D29/4226

  Fan casings · CPC title

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• F24F7/065 Primary

  fan combined with single duct; mounting arrangements of a fan in a duct · CPC title

• F04D1/00

  Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) · CPC title