Cross flow fan and air conditioner fitted with the same

• US 6,761,040 B2
• Filed: 04/15/2003
• Issued: 07/13/2004
• Est. Priority Date: 04/16/2002
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, In Hwa, Chin, Sim Won, Moon, Dong Soo, Lee, Chang Seon, Ahn, Cheol O, Yun, In Cheol, Chung, Mun Kee
• Primary Examiner(s): Tapolcai, William E.
• Assistant Examiner(s): Ali, Mohammad M.
• Application Number:
  US10/413,303
• Publication Number:
  US 20030192337A1
• Time in Patent Office: 455 Days
• Field of Search: 624/26, 624/55, 624/04, 624/11, 624/13, 624/14, 621/86, 622/55, 165/124, 165/122, 415/53.1, 416/178, 416/203, 416/DIG.2
• US Class Current: 62/426
• CPC Class Codes: F01D 5/14 Form or construction selecting particular materials, measures against erosion or corrosion F01D5/28
• CPC Class Codes: F01D 5/16 for counteracting blade vibration
• CPC Class Codes: F04D 17/04 of transverse-flow type
• CPC Class Codes: F04D 29/283 rotors of the squirrel-cage type
• CPC Class Codes: F04D 29/666 by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
• CPC Class Codes: F05D 2260/96 Preventing, counteracting or reducing vibration or noise

Abstract

Cross flow fan, and air conditioner fitted with the same, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction, and a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex, and a number of blades are 32 or 35. The pitch angles of the blades are designed by a computer optimization method taking a number of the blades and the like as parameters.

Claims

1. A cross flow fan comprising:

a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim,

wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex, wherein a number of the blades are 32, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 12.50°

, 9.22°

, 10.00°

, 12.43°

, 11.14°

, 14.08°

, 8.85°

, 12.19°

, 12.39°

, 9.84°

, 11.21°

, 9.41°

, 14.93°

, 10.96°

, 8.18°

, 11.62°

, 12.91°

, 12.00°

, 11.93°

, 10.18°

, 8.33°

, 12.34°

, 10.00°

, 13.90°

, 9.66°

, 12.18°

, 11.87°

, 12.80°

, 11.11°

, 11.23°

, 8.44°

, and 12.16°

.

2. A cross flow fan comprising:

a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim,

wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex,

wherein a number of the blades are 32,

wherein the blades are sloped in a clockwise or counter clockwise direction when seen from the side, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 12.50°

, 9.22°

, 10.00°

, 12.43°

, 11.14°

, 14.08°

, 8.85°

, 12.19°

, 12.39°

, 9.84°

, 11.21°

, 9.41°

, 14.93°

, 10.96°

, 8.18°

, 11.62°

, 12.91°

, 12.00°

, 11.93°

, 10.18°

, 8.33°

, 12.34°

, 10.00°

, 13.90°

, 9.66°

, 12.18°

, 11.87°

, 12.80°

, 11.11°

, 11.23°

, 8.44°

, and 12.16°

.

3. A cross flow fan comprising:

a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim,

wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex,

wherein a number of the blades are 35, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 10.00°

, 10.31°

, 9.20°

, 11.64°

, 10.37°

, 10.67°

, 9.41°

, 12.26°

, 8.36°

, 10.25°

, 11.47°

, 8.27°

, 11.33°

, 11.08°

, 9.36°

, 11.29°

, 7.67°

, 13.44°

, 10.10°

, 9.97°

, 8.08°

, 10.26°

, 13.34°

, 8.33°

, 9.89°

, 10.71°

, 9.54°

, 12.51°

, 7.95°

, 11.76°

, 7.92°

, 13.47°

, 10.81°

, 7.80°

, and 10.87°

.

4. A cross flow fan comprising:

a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim,

wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex,

wherein a number of the blades are 35,

wherein the blades are sloped in a clockwise or counter clockwise direction when seen from the side, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 10.00°

, 10.31°

, 9.20°

, 11.64°

, 10.37°

, 10.67°

, 9.41°

, 12.26°

, 8.36°

, 10.25°

, 11.47°

, 8.27°

, 11.33°

, 11.08°

, 9.36°

, 11.29°

, 7.67°

, 13.44°

, 10.10°

, 9.97°

, 8.08°

, 10.26°

, 13.34°

, 8.33°

, 9.89°

, 10.71°

,9.54°

, 12.51°

, 7.95°

, 11.76°

, 7.92°

, 13.47°

, 10.81°

, 7.80°

, and 10.87°

.

5. An air conditioner comprising:

a casing having an inlet and an outlet;

a cross flow fan for drawing air through the inlet and discharging the air through the outlet, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex; and

an evaporator between the inlet and the cross flow fan for making heat exchange with the air drawn through the inlet,

wherein a number of the blades are 32, and wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 12.50°

, 9.22°

, 10.00°

, 12.43°

, 11.14°

, 14.08°

, 8.85°

, 12.19°

, 12.39°

, 9.84°

, 11.21°

, 9.41°

, 14.93°

, 10.96°

, 8.18°

, 11.62°

, 12.91°

, 12.00°

, 11.93°

, 10.18°

, 8.33°

, 12.34°

, 10.00°

, 13.90°

, 9.66°

, 12.18°

, 11.87°

, 12.80°

, 11.11°

, 11.23°

, 8.44°

, and 12.16°

.

6. An air conditioner comprising:

a casing having an inlet and an outlet;

a cross flow fan for drawing air through the inlet and discharging the air through the outlet, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex; and

an evaporator between the inlet and the cross flow fan for making heat exchange with the air drawn through the inlet,

wherein a number of the blades are 32,

wherein the blades are sloped in a clockwise or counter clockwise direction when seen from the side, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 12.50°

, 9.22°

, 10.00°

, 12.43°

, 11.14°

, 14.08°

, 8.85°

, 12.19°

, 12.39°

, 9.84°

, 11.21°

, 9.41°

, 14.93°

, 10.96°

, 8.18°

, 11.62°

, 12.91°

, 12.00°

, 11.93°

, 10.18°

, 8.33°

, 12.34°

, 10.00°

, 13.90°

, 9.66°

, 12.18°

, 11.87°

, 12.80°

, 11.11°

, 11.23°

, 8.44°

, and 12.16°

.

7. An air conditioner comprising:

a casing having an inlet and an outlet;

a cross flow fan for drawing air through the inlet and discharging the air through the outlet, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex; and

an evaporator between the inlet and the cross flow fan for making heat exchange with the air drawn through the inlet,

wherein a number of the blades are 35, and wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 10.00°

, 10.31°

,9.20°

, 11.64°

, 10.37°

, 10.67°

, 9.41°

, 12.26°

, 8.36°

, 10.25°

, 11.47°

, 8.27°

, 11.33°

, 11.08°

, 9.36°

, 11.29°

, 7.67°

, 13.44°

, 10.10°

, 9.97°

, 8.08°

, 10.26°

, 13.34°

, 8.33°

, 9.89°

, 10.71°

, 9.54°

, 12.51°

, 7.95°

, 11.76°

, 7.92°

, 13.47°

, 10.81°

, 7.80°

, and 10.87°

.

8. An air conditioner comprising:

a casing having an inlet and an outlet;

a cross flow fan for drawing air through the inlet and discharging the air through the outlet, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction; and

a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex; and

an evaporator between the inlet and the cross flow fan for making heat exchange with the air drawn through the inlet,

wherein the blades are sloped in a clockwise or counter clockwise direction when seen from the side, and

wherein the pitch angles of the blades arranged in succession in a clockwise or counter clockwise direction with reference to one of the blades are 10.00°

, 10.31°

, 9.20°

, 11.64°

, 10.37°

, 10.67°

, 9.41°

, 12.26°

, 8.36°

, 10.25°

, 11.47°

, 8.27°

, 11.33°

, 11.08°

, 9.36°

, 11.29°

, 7.67°

, 13.44°

, 10.10°

, 9.97°

, 8.08°

, 10.26°

, 13.34°

, 8.33°

, 9.89°

, 10.71°

, 9.54°

, 12.51°

, 7.95°

, 11.76°

, 7.92°

, 13.47°

, 10.81°

, 7.80°

, and 10.87°

.

9. A cross flow fan with 32 blades arranged according to a table in FIG. 6 having a relation of $A_n=\sum _{}^{}$

n=032

Pn,

where, Pn denotes a pitch angle between adjacent blades in a radial direction from a rotation center of the cross flow fan, and An denotes an accumulated pitch angle which is an accumulated angle of the pitch angles in a clockwise or counter clockwise direction.

10. A cross flow fan with 35 blades arranged according to a table in FIG. 8 having a relation of $A_n=\sum _{}^{}$

n=035

Pn,

where, Pn denotes a pitch angle between adjacent blades in a radial direction from a rotation center of the cross flow fan, and An denotes an accumulated pitch angle which is an accumulated angle of the pitch angles in a clockwise or counter clockwise direction.