Blower and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-10612563-B2
Application number	US-201515738394-A
Country	US
Kind code	B2
Filing date	Jul 10, 2015
Priority date	Jul 10, 2015
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

An air conditioner comprises a compressor to compress a refrigerant, a heat exchanger to move heat of the refrigerant, and a blower to blow air. The blower comprises a fan rotatable about a rotation axis, and a plurality of stationary blades installed to be a radial shape about the rotation axis in a direction in which the airflow generated by the rotation of the fan is discharged, and are curved in a direction opposite to the rotation direction of the fan from an inner circumferential portion to an outer circumferential portion. The stationary blades comprise an inlet edge, and an outlet edge, and an inlet angle formed by the inlet edge and the rotation axis and a chord angle formed by a chord connecting the inlet edge and the outlet edge and the rotation axis are larger at the inner and outer circumferential portions than at a radial center portion.

First claim

The invention claimed is:

1. An air conditioner comprising:
a compressor to compress a refrigerant;
a heat exchanger to move heat of the refrigerant; and
a blower to blow air so as to cool the heat exchanger, the blower comprising a fan which is rotated about a rotation axis; and
a plurality of stationary blades having a radial shape about the rotation axis in a direction in which the airflow generated by the rotation of the fan is discharged, and being curved in a direction opposite to the rotation direction of the fan as they extend from an inner circumferential portion to an outer circumferential portion, each of the stationary blades having a center line passing through a center of thickness of the stationary blade, each of the blades comprising:
an inlet edge through which the airflow generated by the fan is introduced; and
an outlet edge through which the airflow introduced into the inlet edge is discharged, a chord extending between the inlet edge and the outlet edge, wherein
an inlet angle is formed by a tangential line from the rotation axis to the center line and a chord angle is formed by a line extending through the chord to the rotation axis and the rotation axis, and
the inlet angle and the chord angle are larger at the inner circumferential portion and the outer circumferential portion of the stationary blade than at a radial center portion between the inner circumferential portion and the outer circumferential portion.

2. The air conditioner according to claim 1 ,
wherein the stationary blades are continuously changed in accordance with the radial direction position such that the velocity distribution of the airflow generated by the rotation of the fan corresponds to the inlet angle as it changes between the inner circumferential portion and the outer circumferential portion.

3. The air conditioner according to claim 2 ,
wherein the stationary blades are continuously changed in accordance with the radial direction position such that the chord angle corresponds to the inlet angle and the velocity distribution of the airflow generated by the rotation of the fan.

4. The air conditioner according to claim 3 ,
wherein the stationary blades have a larger outlet angle which is formed by the outlet edge and the rotation axis, at the inner circumferential portion and the outer circumferential portion than at the radial center portion between the inner circumferential portion and the outer circumferential portion.

5. The air conditioner according to claim 4 ,
wherein the stationary blades have a longer length of the chord at the inner circumferential portion and the outer circumferential portion than at the radial center portion between the inner circumferential portion and the outer circumferential portion.

6. The air conditioner according to claim 5 ,
wherein the stationary blades are continuously changed in accordance with the radial direction position such that the outlet angle and the length of the chord correspond to the inlet angle and the velocity distribution of the airflow generated by the rotation of the fan.

7. The air conditioner according to claim 1 ,
further comprises an electric motor to drive the fan, a first housing to house the fan and the electric motor, and a second housing provided with the stationary blades.

8. The air conditioner according to claim 7 ,
wherein the first housing has a cylindrical inner wall surface, a flow passage through which the airflow generated by the fan passes along the inner wall surface is formed inside the first housing, and the cross-sectional area of the flow passage is reduced along the advancing direction of the airflow.

9. The air conditioner according to claim 7 ,
wherein the second housing has a cylindrical inner wall surface, a flow passage through which the airflow after passing through the first housing passes along the inner wall surface is formed inside the second housing, and the cross-sectional area of the flow passage is increased along the advancing direction of the airflow.

10. The air conditioner according to claim 9 ,
wherein the stationary blades are provided to extend to a connecting member provided adjacent to the rotation axis from the inner wall surface and are provided in a plate shape having a uniform thickness from the inner circumferential portion contacting with the connecting member to the outer circumferential portion contacting with the inner wall surface.

11. The air conditioner according to claim 10 ,
wherein a ring-shaped supporting member to support the stationary blades is provided between the inner wall surface and the connecting member, and the stationary blades comprise inner circumferential stationary blades connecting the connecting member and the supporting member, and outer circumferential stationary blades connecting the supporting member and the inner wall surface.

12. The air conditioner according to claim 11 ,
wherein the outer circumferential stationary blades are provided to have a larger number than the number of the inner circumferential stationary blades.

13. An air conditioner comprising:
a compressor to compress a refrigerant;
a heat exchanger to move heat of the refrigerant; and
a blower to blow air so as to cool the heat exchanger, the blower comprising a fan which is rotated about a rotation axis; and
a plurality of stationary blades having a radial shape about the rotation axis in a direction in which the airflow generated by the rotation of the fan is discharged, and being curved in a direction opposite to the rotation direction of the fan as they extend from an inner circumferential portion to an outer circumferential portion, each of the stationary blades having a center line passing through a center of thickness of the stationary blade, each of the blades comprising:
an inlet edge through which the airflow generated by the fan is introduced; and
an outlet edge through which the airflow introduced into the inlet edge is discharged, a chord extending between the inlet edge and the outlet edge, wherein
an inlet angle formed by a tangential line from the rotation axis to the center line is larger at the inner circumferential portion and the outer circumferential portion than at a radial center portion between the inner circumferential portion and the outer circumferential portion of the stationary blade, and the length of a chord connecting the inlet edge and the outlet edge is longer at the inner circumferential portion and the outer circumferential portion than at the radial center portion.

14. A blower comprising:
a fan which is rotated about a rotation axis; and
a plurality of stationary blades having a radial shape about the rotation axis in a direction in which the airflow generated by the rotation of the fan is discharged, and being curved in a direction opposite to the rotation direction of the fan as they extend from an inner circumferential portion to an outer circumferential portion, each of wherein the stationary blades having a center line passing through a center of thickness of the stationary blade, each of the stationary blades comprising:
an inlet edge through which the airflow generated by the fan is introduced, and
an outlet edge through which the airflow introduced into the inlet edge is discharged, wherein
an inlet angle formed by a tangential line from the rotation axis to the center line and a chord angle formed by a line extending through a chord connecting the inlet edge and the outlet edge and the rotation axis, and
the inlet angle and the chord angle are larger at the inner circumferential portion and the outer circumferential portion of the stationary b

Assignees

• Samsung Electronics Co Ltd

Inventors

• Sato Seiji

Classifications

• F04D29/542 Primary

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F04D29/38

  Blades {(for axial flow compressors F04D29/324)} · CPC title

• F04D25/06

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

• F24F1/38

  Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings · CPC title

• F24F1/08

  Compressors specially adapted for separate outdoor units · CPC title