Centrifugal fan

Patent metadata

Field	Value
Publication number	US-2016281731-A1
Application number	US-201615080440-A
Country	US
Kind code	A1
Filing date	Mar 24, 2016
Priority date	Mar 24, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

Disclosed herein are a centrifugal fan and a refrigerator. The centrifugal fan according to an aspect of the present disclosure has a structure in which a plurality of blades disposed along a circumferential direction are disposed in two lines in a radial direction of a hub, such that the noise of the fan is reduced and the flow rate of air is increased, and the efficiency of the fan is improved, and the centrifugal fan includes a middle guide member inducing an inflow in the center of the fan, such that the inflow to the fan is prevented from being concentrated in a lower part of the fan, and a total height of a discharge port is efficiently used. Therefore, the uniformity of a component of a discharging flow at the discharge port is improved and thus the noise of the fan is reduced.

First claim

What is claimed is:

1 . A centrifugal fan comprising:
a hub to which a rotation shaft of a motor is coupled; a shroud disposed facing the hub; a guide member disposed between the shroud and the hub to change a flow direction of air introduced in an axial direction of the hub to a circumferential direction of the hub; a plurality of first blades separated from each other and disposed along the circumferential direction of the hub; and a plurality of second blades disposed to be separated from each other along the circumferential direction of the hub, while disposed to be separated from the plurality of first blades in a radial direction of the hub.

2 . The centrifugal fan according to claim 1 , wherein a diameter of the hub is smaller than an inner diameter of the guide member.

3 . The centrifugal fan according to claim 1 , wherein the guide member includes:
an inlet-side planar region into which air is introduced; an outlet-side planar region from which the air is discharged; and a curved surface region which connects the inlet-side planar region to the outlet-side planar region.

4 . The centrifugal fan according to claim 3 , wherein an angle of the inlet-side planar region of the guide member inclined with respect to a direction of the rotation shaft of the hub is in a range of −20° to 45°.

5 . The centrifugal fan according to claim 1 , wherein the guide member is connected to the hub by the plurality of first blades.

6 . The centrifugal fan according to claim 1 , wherein the guide member is connected to the shroud by the plurality of second blades.

7 . The centrifugal fan according to claim 1 , wherein a diameter of an inlet of the guide member is smaller than a diameter of an outlet of the guide member.

8 . The centrifugal fan according to claim 7 , wherein the diameter of the inlet of the guide member is in a range of 20% to 80% of a total diameter of the centrifugal fan.

9 . The centrifugal fan according to claim 7 , wherein the diameter of the outlet of the guide member is in a range of 30% to 90% of a total diameter of the centrifugal fan.

10 . The centrifugal fan according to claim 1 , wherein a height of an inlet of the guide member is 120% or less of a total height of the centrifugal fan.

11 . The centrifugal fan according to claim 1 , wherein a height of an outlet of the guide member is 90% or less of a height of an outlet of the centrifugal fan

12 . The centrifugal fan according to claim 1 , wherein an outer diameter of the guide member is smaller than an inner diameter of the shroud.

13 . The centrifugal fan according to claim 1 , wherein each of the plurality of second blades includes one side and the other side with respect to the guide member, and the one side and the other side are formed in different shapes from each other.

14 . The centrifugal fan according to claim 13 , wherein a code length of the one side is greater than or equal to a code length of the other side.

15 . The centrifugal fan according to claim 13 , wherein an inlet angle of the one side and an inlet angle of the other side are different from each other, and an outlet angle of the one side and an outlet angle of the other side are the same.

16 . A centrifugal fan comprising:
a hub to which a rotation shaft of a motor is coupled; a shroud disposed facing the hub; at least one guide member disposed between the shroud and the hub to change a flow direction of air introduced in an axial direction of the hub to a circumferential direction of the hub; and a plurality of blades disposed to be separated from each other along the circumferential direction of the hub.

17 . The centrifugal fan according to claim 16 , wherein a diameter of the hub is smaller than an inner diameter of a guide member that is smallest among the at least one guide member.

18 . The centrifugal fan according to claim 16 , wherein among the at least one guide member, an inner diameter of a guide member of a shroud-side among the at least one guide member is greater than an outer diameter of a guide member of a hub-side among the at least one guide member.

19 . The centrifugal fan according to claim 16 , wherein the at least one guide member is connected to the shroud or the hub by the plurality of blades.

20 . The centrifugal fan according to claim 16 , wherein an outer diameter of the at least one guide member is smaller than an inner diameter of the shroud.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Hyun Joo
• Heo Kwang Su
• Seo Eung Ryeol
• Kang Hyo Suck

Classifications

• F04D29/444

  Bladed diffusers · CPC title

• F04D29/282

  the leading edge of each vane being substantially parallel to the rotation axis · CPC title

• F04D29/667

  by influencing the flow pattern, e.g. suppression of turbulence · CPC title

• F04D29/281 Primary

  for fans or blowers · CPC title

• F04D29/663

  Sound attenuation · CPC title