Turbo fan and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-2016356284-A1
Application number	US-201615167077-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Jun 3, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

Disclosed herein are a turbo fan, which is capable of implementing high efficiency of ventilation and reducing noise by providing a bended portion being bended in a reverse direction against a rotational direction of a wing between a leading edge and a tailing edge thereof to reattach an air separation generated at a negative pressure surface of the wing, and an air conditioner having the same. The air conditioner includes the turbo fan, wherein the turbo fan includes a main plate having a disc shape and on which a rotational shaft is mounted, a side plate provided to be separated from the main plate along an axial direction of the rotational shaft and having a ring shape in which an opening is provided at a center portion of the side plate, and a wing fixed between the main plate and the side plate and provided in plural numbers along a circumferential direction of the main plate, and wherein a bended portion, which is bended in a reverse direction against a rotational direction of the wing, is provided at the wing between a portion of a leading edge of the wing coming in contact with the side plate and a tailing edge of the wing.

First claim

What is claimed is:

1 . An air conditioner comprising:
a turbo fan including:
a main plate having a disc shape and on which a rotational shaft is mounted;
a side plate provided to be separated from the main plate along an axial direction of the rotational shaft and having a ring shape with an opening at a center portion of the side plate; and
a plurality of wings fixed between the main plate and the side plate along a circumferential direction of the main plate,
wherein each wing of the plurality of wings includes
a leading edge having a portion coming in contact with the side plate,
a trailing edge, and
a bended portion, which is bended in a reverse direction against a rotational direction of the wing between the portion of the leading edge of the wing coming in contact with the side plate and the tailing edge of the wing.

2 . The air conditioner of claim 1 , wherein, for each wing of the plurality of wings:
the leading edge has a main plate contact portion at which the leading edge and the main plate come in contact with each other, the main plate contact portion having a first curved shape in which a first curvature variation is small, the leading edge has a side plate contact portion at which the leading edge and the side plate come in contact with each other, the side plate contact portion having a second curved shape in which a second curvature variation is small, and the bended portion is between the main plate contact portion and the side plate contact portion.

3 . The air conditioner of claim 1 , wherein, for each wing of the plurality of wings, the tailing edge is provided to have a straight line shape inclined toward an axial direction of the turbo fan, or a curve shape waved in an axial direction.

4 . The air conditioner of claim 1 , wherein air is suctioned through the opening provided in the side plate, and the air suctioned through the opening is discharged through an empty area between the side plate and the main plate.

5 . The air conditioner of claim 4 , wherein the side plate is provided to have an outer diameter equal to that of the main plate, and a shape in which an inner diameter is decreased as it goes toward an inner side in a direction away from the main plate.

6 . The air conditioner of claim 1 , wherein each wing of the plurality of wings is configured to have a convexly curved shape in the rotational direction of the wing, and to include a positive pressure surface which is an outer circumferential surface in the rotational direction of the wing and a negative pressure surface which is a rear surface opposite to the positive pressure surface.

7 . The air conditioner of claim 6 , wherein the main plate includes a faceplate part facing the side plate, and the leading edge and the tailing edge of each wing of the plurality of wings are formed from the faceplate part to an inner circumferential surface of the side plate.

8 . The air conditioner of claim 7 , wherein, for each wing of the plurality of wings, a distance between a main plate contact portion at which the leading edge and the main plate come in contact with each other and the rotational shaft is less than a radius of the opening, and a distance between a side plate contact portion at which the leading edge and the side plate come in contact with each other and the rotational shaft is greater than the radius of the opening.

9 . The air conditioner of claim 8 , wherein, for each wing of the plurality of wings, the tailing edge is fixed to an outer edge portion of the main plate and an outer edge portion of the side plate.

10 . The air conditioner of claim 8 , wherein, for each wing of the plurality of wings, the main plate contact portion and the side plate contact portion are provided to have a curved shape having no bended portion, and the bended portion is provided between the main plate contact portion and the side plate contact portion.

11 . The air conditioner of claim 6 , wherein, for each wing of the plurality of wings, each of the positive pressure surface of the wing and the negative pressure surface thereof is bended in a reverse direction against the rotational direction of the wing at the bended portion.

12 . The air conditioner of claim 11 , wherein, for each wing of the plurality of wings, the positive pressure surface and the negative pressure surface are provided to have a front end bending modulus being constant from the leading edge to the bended portion and a rear end bending modulus being constant from the bended portion to the tailing edge, and the front end bending modulus and the rear end bending modulus are provided to have bending moduli different from each other.

13 . The air conditioner of claim 11 , wherein, for each wing of the plurality of wings, the positive pressure surface and the negative pressure surface are provided to have a front end bending modulus being continuously varied from the leading edge to the bended portion and a rear end bending modulus being continuously varied from the bended portion to the tailing edge, and the front end bending modulus and the rear end bending modulus are provided to have bending moduli different from each other.

14 . The air conditioner of claim 1 , wherein, for each wing of the plurality of wings, when a separation distance between outer edges of the main plate and the side plate along a direction of the rotational shaft is h 0 and a height of the wing from the main plate along the direction of the rotational shaft is h 1 , the wing is bended in the reverse direction against the rotational direction of the wing in a range of the height h 1 satisfying 0.2≦h 1 /h 2 ≦0.8.

15 . The air conditioner of claim 1 , wherein, for each wing of the plurality of wings, a diameter direction length Ra from the rotational shaft to the leading edge, a diameter direction length Rb from the rotational shaft to the tailing edge, and a diameter direction length Rc from the rotational shaft to the bended portion satisfy 0.3≦(Rc−Ra)/(Rb−Ra)≦0.7.

16 . The air conditioner of claim 1 , wherein, for each wing of the plurality of wings, a wing angle βa formed between an extended direction of the wing at the leading edge and a tangential direction of a rotational orbit of the leading edge, and a wing angle βc formed between an extended direction of the wing at the bended portion and a tangential direction of a rotational orbit of the bended portion satisfy 0.6≦βc/βa0.9.

17 . A ventilation device comprising:
a turbo fan including:
a main plate having a disc shape and on which a rotational shaft is mounted;
a side plate provided to be separated from the main plate along an axial direction of the rotational shaft and having a ring shape with an opening at a center portion of the side plate; and
a plurality of wings fixed between the main plate and the side plate along a circumferential direction of the main plate,
wherein each wing of the plurality of wings includes
a leading edge having a portion coming in contact with the side plate,
a trailing edge, and
a bended portion, which is bended in a reverse direction against a rotational direction of the wing between the portion of the leading edge of the wing coming in contact with the side plate and the tailing edge of the wing.

18 . The ventilation device of claim 17 , wherein, for each wing of the plurality of wings:
the leading edge has a main plate contact portion at which the leading edge and the main plate come in contact with each other, the main plate contact portion having a first curved shape in which a first curvature var

Assignees

• Samsung Electronics Co Ltd

Inventors

• Nakagawa Suguru

Classifications

• F04D29/281 Primary

  for fans or blowers · CPC title

• F04D29/30

  Vanes · CPC title

• F04D25/08

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

• F24F1/0022 Primary

  Centrifugal or radial fans · CPC title

• F04D29/002

  especially adapted for elastic fluid pumps · CPC title