KR20090041467A - Blower fan - Google Patents

Abstract

This embodiment relates to a blowing fan.

Blowing fan of the air conditioner according to the embodiment is a shroud; A hub for guiding the flow of discharged air; And a blade having a plurality of blades formed in the gap between the shroud and the hub, and the inner diameter of the blade is gradually changed from the shroud side to the hub side.

Description

Blower fan {Blower fan}

This embodiment relates to a blowing fan.

The blowing fan is to allow a large amount of air to be sucked and forced blowing, the turbo fan of the main interest in the present embodiment, after the air is sucked in the vertical direction of the turbo fan and the air flow direction is bent 90 degrees by the blade This is a device that allows forced blowing in the centrifugal direction of the fan.

The blowing fan consists of a shroud formed on the inlet side of the air, a hub formed on the discharge side, and a plurality of blades fixed to the shroud and the hub.

Such a blowing fan may generate noise in the process of being rotated, and in recent years, efforts have been made to reduce the noise generated in the process of rotating the blowing fan.

The present embodiment is proposed under the background as described above, and an object of the present invention is to propose a blowing fan in which the noise generated during the rotation process is reduced by improving the shape of the blade.

Blowing fan of the air conditioner according to the present embodiment for achieving the above object is a shroud; A hub for guiding the flow of discharged air; And a blade having a plurality of blades formed in the gap between the shroud and the hub, and the inner diameter of the blade is gradually changed from the shroud side to the hub side.

Blowing fan according to another aspect is a shroud; A hub for guiding the flow of discharged air; And a plurality of blades formed in a gap between the shroud and the hub, and the height of the blade is gradually increased from the center side of the hub to the outside.

According to the proposed embodiment, since the inner diameter of the shroud side of the blade decreases step by step toward the hub side, it is possible to increase the velocity vector of the decreasing air in the portion adjacent to the hub.

In addition, if the velocity vector of the air decreasing in the portion adjacent to the hub is increased, the velocity vector of the air at the air inlet side of the blade becomes uniform as a whole to stabilize the flow of air and reduce the vortex of air at the hub side. Can be.

As such, when the vortex of the air is reduced on the hub side, the air volume is prevented from being reduced, and the rotation noise and the power consumption of the fan are increased by increasing the rotation speed of the blower fan to increase the reduced airflow. .

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of an air conditioner equipped with a blowing fan according to the present embodiment.

In the present embodiment, an air conditioner provided with a blowing fan, in particular, an air conditioner installed on the ceiling is described as an example, but the idea of the present embodiment is not limited to the apparatus to which the blowing fan is applied.

Referring to FIG. 1, an air conditioner 1 having a blowing fan according to the present embodiment includes a cabinet 10 installed on a ceiling 5 and a front panel coupled to a bottom surface of the cabinet 10. 20), a fan motor 30 fixed to the inner upper surface of the cabinet 10, a blowing fan 100 connected to the fan motor 30 to forcibly blow indoor air, and the blowing fan 100 A heat exchanger 50 for exchanging the indoor air sucked by the internal refrigerant with the refrigerant is included.

In addition, the air conditioner 1 is provided below the blower fan 100, the bell mouth 45 for guiding the flow of air sucked into the cabinet 10, and the heat exchanger (50) It is provided at the bottom of the drain fan 70 for receiving the condensate generated by condensation in the process of passing the air through the heat exchanger (50) is included.

In detail, the cabinet 10 has a substantially square shape, and the bottom surface has an open shape. In addition, the front panel 20 is coupled to the opening to shield the inside thereof.

In addition, a suction port 22 is formed at a central portion of the front panel 20 to allow indoor air to be sucked into the cabinet, and a plurality of suction holes 22 are disposed around the suction port 22 to discharge air passing through the heat exchanger into the room. The discharge port 24 is formed.

In this case, the suction port 22 may be formed in a quadrangular shape, and the discharge port 24 may be formed to correspond to each side of the suction port 22.

Each of the discharge ports 24 is rotatably coupled with a discharge vane 26 for adjusting a direction of the discharged air by a hinge.

Here, the blower fan 10 is a turbo fan is used to allow the air is sucked in the axial direction and discharged in the radial direction.

Looking at the flow path of the air formed by this structure, the air is sucked upward from the lower side of the cabinet 10 by the blowing force generated by the rotation of the blowing fan (100). In addition, the sucked air flows in the axial direction of the blower fan 100 and is discharged in the radial direction. In addition, the air discharged in the radial direction of the blower fan 100 exchanges heat while passing through the heat exchanger 50. Then, the heat-exchanged air flows downward with the flow direction switched, and is discharged into the room through the discharge port 24.

Hereinafter, the structure of the blowing fan 100 according to the present embodiment will be described in detail.

FIG. 2 is a perspective view of a blowing fan according to the present embodiment, and FIG. 3 is an enlarged view of portion A of FIG. 2.

2 and 3, the blowing fan 100 according to the present embodiment, the shroud 110 is formed on the inlet side of the air, the hub 120 is formed on the discharge side of the air, and the shira A plurality of blades 130 formed in the gap between the wood 110 and the hub 120 is included.

In detail, the hub 120 is formed at a position opposite to the shroud 100 while being formed in a cylindrical shape. In addition, while the resistance of the air introduced from the front is reduced, the central portion is formed to protrude convexly toward the shroud 110 so that the moving direction of the air can be converted and discharged in the circumferential direction of the fan. That is, the ridge 122 is formed at the center of the hub 120.

In addition, a motor is installed inside the ridge 122, and an upper end of the ridge 122 has a shaft insertion portion into which a rotation shaft of the motor is inserted.

On the other hand, the blade 130 is located between the shroud 110 and the hub 120, the outer diameter is formed constant. That is, the outer diameter of the blade 130 is the same as the shroud 110 side and the hub 120 side. As such, when the outer diameter of the blade 130 is formed to be constant, a decrease in air volume may be prevented.

In addition, the outer diameter of the shroud 110 side of the blade 130 is formed to be the same as the outer diameter of the shroud 110, the outer diameter of the hub 120 side of the blade 130 is the hub 120 It is formed larger than the outer diameter of. That is, the outer diameter of the hub 120 is formed smaller than the outer diameter of the blade 130.

In addition, the blade 130 is composed of a plurality of members 131 having different heights (A direction). In addition, the plurality of members 131 are integrally formed to form a complete shape of the blade 130.

In addition, the plurality of members 131 are formed so that their height increases in steps toward the outer side from the center side of the hub 125. That is, the portion adjacent to the shroud 110 of the blade 130 is formed in a step shape.

In addition, the surface 132 adjacent to the shroud 110 of the plurality of members 131 may be rounded to reduce the flow resistance of air.

In another aspect, the blade 130 may be described as being composed of a plurality of members having different lengths (B directions). In addition, the plurality of members may be formed such that the length increases stepwise from the shroud 110 side to the hub 120 side.

At this time, since the outer diameter of the blade 130 is the same, the inner diameter of the blade is formed so that the inner diameter gradually decreases from the shroud 110 side toward the hub 120 side.

Referring to the advantages of the blower fan forming the above structure as follows.

Inhaled air generally travels to the hub side after the first encounter with the adjacent shroud of the blade. Then, as the air meets the hub, the flow direction is switched, and the discharge direction is guided by the blade and discharged to the outside of the blower fan.

At this time, when the air passes through the blade portion adjacent to the shroud, there is almost no vortex, but when the air passes through the blade adjacent to the hub side, the air velocity decreases, thereby increasing the vortex.

However, according to the blade of the present embodiment, since the outer diameter of the blade 130 is kept constant, the inner diameter of the shroud 110 side of the blade 130 gradually decreases toward the hub 120 side. In this case, it is possible to increase the velocity vector of the decreasing air in the portion adjacent to the hub 120.

In addition, when the velocity vector of the air decreasing in the portion adjacent to the hub 120 is increased, the velocity vector of the air at the air inlet side of the blade 120 becomes uniform, so that the flow of air is stabilized, and the hub ( Vortex of the air at the 120) side can be reduced.

As such, when the vortex of the air is reduced on the hub 120 side, the amount of air is prevented from being reduced, and the rotation noise of the blowing fan 100 is increased by increasing the number of rotations of the blowing fan 100 to increase the reduced amount of air. The increase in power consumption can be prevented.

1 is a cross-sectional view of the air conditioner with a blowing fan according to the present embodiment.

2 is a perspective view of a blowing fan according to the present embodiment.

3 is an enlarged view of a portion A of FIG. 2.

Claims (5)

Shrouds; A hub for guiding the flow of discharged air; And Includes a plurality of blades are formed in the gap between the shroud and the hub, The inner diameter of the blade blower fan is changed step by step from the shroud side to the hub side. The method of claim 1, The inner diameter of the blade blower fan is gradually reduced from the shroud side toward the hub side. The method of claim 1, The outer diameter of the blade is a constant blowing fan. Shrouds; A hub for guiding the flow of discharged air; And Includes a plurality of blades are formed in the gap between the shroud and the hub, The height of the blade blower fan is increased step by step toward the outside from the center side of the hub. The method of claim 4, wherein The outer diameter of the shroud side and the hub side of the blade is the same blowing fan.

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