Diffuser, centrifugal compression power system and bladeless fan

Patent metadata

Field	Value
Publication number	US-11905970-B2
Application number	US-202016819196-A
Country	US
Kind code	B2
Filing date	Mar 16, 2020
Priority date	Mar 12, 2015
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A diffuser includes a lower element and an upper element. The upper element is fixed on the lower element, and the upper element and the lower element are formed separately. The lower element includes a lower inner wall and a lower outer wall, and the upper element includes an upper inner wall and an upper outer wall. The upper inner wall is connected to the lower inner wall to form an internal air-guiding surface, the upper outer wall is connected to the lower outer wall to form an external air-guiding surface, and the internal air-guiding surface is disposed opposite to the external air-guiding surface to define an air-guiding channel for air flow diffusion. The upper element further includes an upper air-guiding wing for connecting the upper inner wall and the upper outer wall, and the lower element further includes a lower air-guiding wing for connecting the lower inner wall and the lower outer wall.

First claim

What is claimed is:

1. A diffuser configured to be used in a bladeless fan, comprising:
a lower element; and
an upper element fixed on the lower element;
wherein the upper element is above the lower element in a vertical direction of the diffuser, and airflow is guided by the lower element towards the upper element
wherein the upper element and the lower element are formed separately; the lower element comprises a lower inner wall and a lower outer wall, and the upper element comprises an upper inner wall and an upper outer wall; the upper inner wall is connected to the lower inner wall to form an internal air-guiding surface; the upper outer wall is connected to the lower outer wall to form an external air-guiding surface; the internal air-guiding surface is disposed opposite to the external air-guiding surface, and an air-guiding channel configured to diffuse an airflow is defined between the internal air-guiding surface and the external air-guiding surface; the upper element further comprises an upper air-guiding wing for integrally connecting the upper inner wall and the upper outer wall, and the lower element further comprising a lower air-guiding wing for integrally connecting the lower inner wall and the lower outer wall; the upper air-guiding wing is connected to the lower air-guiding wing to form an air-guiding wing for connecting the internal air-guiding surface and the external air-guiding surface;
wherein the lower end of the upper outer wall abuts the upper end of the lower outer wall;
wherein the lower outer wall and the upper outer wall forms a outer wall, the lower inner wall and the upper inner wall forms an inner wall, both diameters of the outer wall and the inner wall decrease gradually from lower end of the diffuser to upper end of the diffuser; and p 1 the inner wall is in shape of a cone, upper end of the inner wall forms vertex of the cone.

2. The diffuser according to claim 1 , wherein the air-guiding wing comprises a plurality of air-guiding wings, and the plurality of air-guiding wings are spiral in shape and provided equiangularly;
wherein each of the plurality of air-guiding wings is shaped like a curved sheet and streamlined, each of the plurality of air-guiding wings extends outwardly from a center of the diffuser in a radial direction, and the airflow entering the diffuser is expelled in a spiral airflow shape through the plurality of air-guiding wings.

3. The diffuser according to claim 1 , wherein a through hole is formed in the internal air-guiding surface, and the through hole is located between two adjacent lower air-guiding wings.

4. The diffuser according to claim 1 , wherein the upper element is connected to the lower element through a screw.

5. The diffuser according to claim 1 , further comprising a spacing ring extending downwardly from inner surface of the lower inner wall, the spacing ring is provided with multiple through grooves.

6. A centrifugal compression power system, comprising: a diffuser according to claim 1 .

7. The centrifugal compression power system according to claim 6 , further comprising:
a motor, and an impeller connected to the motor, wherein the motor is located between the diffuser and the impeller, and the diffuser is connected downstream of an airflow produced by the impeller.

8. A bladeless fan, comprising:
a centrifugal compression power system, wherein the centrifugal compression power system comprises a diffuser according to claim 1 .

9. The diffuser according to claim 1 , wherein the upper air-guiding wing connects with inner surface of the upper outer wall, the lower air-guiding wing connects with outer surface of the lower inner wall, and connection section of the upper air-guiding wing and the lower air-guiding wing is located within the air-guiding channel.

Assignees

• Gd Midea Env Appliances Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Dou Hai
• Ma Lie
• Shao Chen

Classifications

• F04D29/441 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F04D25/08

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

• F04D29/624

  especially adapted for elastic fluid pumps · CPC title