Blower

Patent metadata

Field	Value
Publication number	US-12038016-B2
Application number	US-202017783385-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 9, 2019
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A blower is provided that includes a lower case having a suction hole through which air flows into the blower; an upper case which is disposed at an upper side of the lower case and which has a discharge port through which the air is discharged from the blower; a fan motor that provides a rotational force; and a fan disposed inside of the lower case and fixed to a motor shaft of the fan motor. The fan includes a hub having an outer surface, which extends at an incline at a first angle with respect to the motor shaft; a plurality of blades coupled to the hub; and a shroud having an inner surface which extends at an incline, with respect to the motor shaft, at a second angle that is greater than the first angle, and which faces the outer surface of the hub with respect to the plurality of blades, and thus, the air discharged from the fan may change into an ascending current.

First claim

The invention claimed is:

1. A blower, comprising:
a lower case in which a suction hole through which air flows into the blower is formed;
an upper case that is disposed on the lower case and in which a discharge hole through which air is discharged out of the blower is formed;
a fan motor that provides a rotational force; and
a fan that is disposed in the lower case and is fixed to a motor shaft of the fan motor, wherein the fan includes:
a hub having an outer surface that extends at an incline at a first angle with respect to the motor shaft;
a plurality of blades coupled to the hub; and
a shroud that extends at an incline at a second angle, which is larger than the first angle, with respect to the motor shaft, and having an inner surface facing the outer surface of the hub with the plurality of blades therebetween, wherein an outer end of the outer surface of the hub in a radial direction and an inner end of the shroud in the radial direction are aligned along a line that extends parallel to the motor shaft.

2. The blower of claim 1 , wherein the hub forms a hub upper end by extending outward in the radial direction, wherein the shroud forms a shroud edge by extending outward in the radial direction, and wherein the shroud edge is positioned outside of the hub upper end in the radial direction.

3. The blower of claim 1 , wherein the shroud includes:
a rim portion that extends in a circumferential direction; and
a supporting portion that extends outward in the radial direction from the rim portion, and wherein the rim portion is positioned outside of a hub upper portion in the radial direction formed by extending the hub outward in the radial direction.

4. The blower of claim 1 , wherein the hub includes:
a shaft coupling portion that protrudes upward and downward at a center of the hub and in which the motor shaft is inserted;
a first guide surface that extends horizontally outward from the shaft coupling portion; and
a second guide surface that extends at an incline upward from an outer end of the first inclined surface.

5. The blower of claim 4 , wherein the shaft coupling portion forms a hub lower end by protruding downward from the center of the hub and forms a hub protruding portion by protruding upward, and wherein the shroud has a shroud edge formed at a height between the hub lower end and the hub protruding portion.

6. The blower of claim 4 , wherein the shroud has a shroud edge positioned at a height between a hub lower end formed by the shaft coupling portion protruding downward from the center of the hub and the first guide surface.

7. The blower of claim 4 , wherein the shroud includes a rim portion that extends in a circumferential direction, a supporting portion that extends outward from the rim portion, and a rim portion upper end that connects the rim portion and the supporting portion, and wherein the shaft coupling portion is positioned higher than the rim portion upper end.

8. The blower of claim 1 , wherein an inclination angle of the shroud with respect to a horizontal surface is formed in a range of 35 degrees to 50 degrees.

9. The blower of claim 1 , wherein an expansion angle is formed between the hub and the shroud.

10. The blower of claim 9 , wherein the expansion angle is formed within a range of 11 degrees and 26 degrees.

11. A blower, comprising:
a lower case in which a suction hole through which air flows into the blower is formed;
an upper case that is disposed on the lower case and in which a discharge hole through which air is discharged from the blower is formed;
a fan that is disposed in the lower case and has a plurality of blades; and
a diffuser that is disposed at a downstream side of the fan and extends in an upward-downward direction, wherein the diffuser includes a lower end that is concave upward such that a length between the lower end and an upper end at a middle portion of the diffuser in a radial direction is smaller than at an outer edge or an inner edge of the diffuser in the radial direction.

12. The blower of claim 11 , further comprising:
a fan housing in which the fan is accommodated; and
a motor housing in which a fan motor that applies power to the fan is accommodated, wherein the diffuser is disposed between the fan housing and the motor housing.

13. The blower of claim 11 , wherein the diffuser extends to be curved in the upward-downward direction.

14. The blower of claim 11 , wherein the diffuser includes:
a first extending portion that extends to be curved downward from an upper end;
a second portion extending that extends upward from the lower end; and
a bending portion that connects the first extending portion and the second extending portion.

15. The blower of claim 11 , wherein the fan includes a hub in which a motor shaft of a fan motor is inserted and a shroud that is disposed to be spaced under the hub, and wherein at least a portion of the diffuser is positioned between the hub and the shroud in the radial direction.

16. The blower of claim 11 , wherein a height of a lower end formed to be concave from an upper side is formed within a range of 10% to 30% of an entire height of the diffuser.

17. The blower of claim 11 , wherein the diffuser includes a plurality of diffuser grooves that extends in the upward-downward direction and spaced apart from each other in an extension direction of the lower end, and a rib is formed between the plurality of diffuser grooves.

18. The blower of claim 17 , wherein groove lower ends of the plurality of diffuser grooves are formed to come in contact with a lower end of the diffuser.

19. The blower of claim 17 , wherein groove upper ends of the plurality of diffuser grooves are formed to be spaced apart from an upper end of the diffuser.

20. The blower of claim 17 , wherein groove upper ends of the plurality of diffuser grooves are positioned on a singular horizontal surface.

Assignees

• Lg Electronics Inc

Inventors

• Jung Jaehyuk
• Choi Seokho
• Lee Changhoon
• Kim Juhyun
• Park Hyungho
• Kim Hoojin
• Kim Yongmin
• CHOI Chiyoung

Classifications

• F04D29/522

  especially adapted for elastic fluid pumps · CPC title

• F04D29/326

  comprising a rotating shroud · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F24F13/24

  Means for preventing or suppressing noise · CPC title

• F24F13/20

  Casings or covers · CPC title