KR101469982B1 - Double axial flow fan for motor vehicle - Google Patents

Abstract

A vehicle cooling fan assembly includes a drive motor (100) having a rotation shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing portion 220 extending from the inner circumferential surface of the ventilation hole 210 in a radial direction by a plurality of stator 221 to securely support the driving motor 100, 200); And are arranged radially on the outer periphery of the hubs 310 and 410 and the hubs 310 and 410 which are coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, And the front and rear fans 300 and 400 include front and rear fans 300 and 400 having a plurality of blades 320 and 420 such that the blades 320 and 420 are staggered And is coupled to the rotating shaft 110 of the driving motor 100.

As described above, the vehicular cooling fan assembly is configured such that the front and rear fans are disposed at both ends of the rotary shaft of the driving motor such that the blades are staggered so that the air volume generated by the front fan is effectively discharged by the rear fan, So that the cooling efficiency of the heat exchanger is increased.

Fan, shroud, wing, car, heat exchanger

Description

Technical Field [0001] The present invention relates to a cooling fan assembly for a vehicle,

The present invention relates to a fan assembly, and more particularly, to a cooling fan assembly for a vehicle used for cooling a heat exchange medium passing through a heat exchanger such as a radiator or a condenser of an automobile.

In general, an axial flow fan is a fluid machine that rotates a plurality of vanes, which are a plurality of vanes arranged in a radial direction, to blow air in an axial direction. The axial flow fan generally surrounds the axial fan, Which together form a single fan assembly.

The fan assembly is configured to blow air into the heat exchanger to promote heat dissipation of an air-cooled heat exchanger such as a radiator or a condenser of an automobile. Depending on the arrangement type of the heat exchanger, a pusher type and a puller type.

The pusher type is a type in which the axial flow fan forcibly blows air to the rear side in front of the heat exchanger. This type is used when the air space to the heat exchanger is low and therefore the clearance space is narrow behind the heat exchanger in the engine room. Is a type in which the air in front of the heat exchanger is sucked in through the heat exchanger at the rear of the heat exchanger and is applied to most automobiles because the blowing efficiency is relatively higher than that of the pusher type.

1, a hub (hub) 20 coupled to a shaft 52 of a driving source, such as the motor 50, is connected to the axial fan 52, A plurality of blades 30 radially disposed on the outer periphery of the hub 20 and a fan band 40 connecting the ends of the blades 30 to prevent deformation of the blades 30. [ .

Therefore, the axial fan 10 is rotated by the rotational force transmitted from the driving motor 50 to the hub 20, so that the air can be blown in the axial direction by the blades 30.

Here, the sweeping angle in the present specification is defined with reference to FIG. 2, the vane 30 of the axial fan has a leading edge 32a and a trailing edge 32b. In general, the leading edge 32a and the trailing edge 32b are inclined in the same direction . An angle between a radius line rn passing through a certain point from the center of the hub 20 and a tangent line at any point is defined as a sweep angle σr in order to indicate a tilting direction of the blade 30. In the drawing, ML means the center line of the leading edge 32a and trailing edge 32b.

In FIG. 2, on the side of the root of the blade 32c contacting the hub 20, it leans in the direction opposite to the rotation, and on the side of the tip of the blade 30d which is the tip of the blade 30 is inclined in the direction of rotation so that the angle of flexure? (-) on the side of the root portion 32c and is changed from the tip side to the forward side (+) by being bent at a specific point (hereinafter referred to as inflection point rI) while going to the tip end 32d. In other words, (? R2 > 0) at the tip side region (r > rI). In Fig. 3, it has a backward deflection angle at r1 and an forward deflection angle at r2. Generally, the axial flow fan has a flow concentrating portion (C) in which the flow concentrates near the inflection point (rI) of each blade whose bending angle changes from backward to forward.

2, the conventional axial fan is manufactured such that the blade 30 has the tip of the blade 30 at a forward deflection angle and the tip of the blade 30 has a backward deflection angle.

In addition, a shroud 60 fixed to a heat exchanger of a vehicle is used for effectively guiding the air blown by the axial flow fan 10 to the heat exchanger, and the shroud 60 (50) so that the axial flow fan (10) can be rotatably inserted to guide the air blowing.

However, in the conventional vehicle cooling fan assembly, only one axial fan is coupled to the shaft of the driving source to limit the amount of air generated, which lowers the cooling efficiency of the heat exchanger.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cooling fan assembly for a vehicle that is capable of increasing the cooling efficiency by increasing the blowing amount in a state where the cooling fan assembly is installed in a heat exchanger of a vehicle.

According to an aspect of the present invention, there is provided a cooling fan assembly for a vehicle including: a driving motor having a rotary shaft; A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); A hub 310 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, Rear fan 300 and 400 radially disposed on the outer periphery and having a plurality of blades 320 and 420. The front and rear fans 300 and 400 are connected to each other by inter- 420 are coupled to the rotating shaft 110 of the driving motor 100 such that the wings 320 and 420 of the front and rear fans 300 and 400 are bent at angles 321 and 421 And the rear end of the tip end 322 is connected to the rear end of the tip end 322,

The wing 420 of the rear fan 400 is positioned such that the center of the end where the wing 420 and the hub 410 are in contact is positioned at an intermediate angle between two adjacent wings 320 of the front fan 300 .

The blades 320 and 420 of the front and rear fans 300 and 400 have the tip ends 322 and 422 of the blades 320 and 320 bent backward.

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A vehicle cooling fan assembly of the present invention includes a drive motor (100) having a rotation shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); A hub 310 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, (300) (400) having a plurality of blades (320) and (420) disposed radially on the outer periphery of the front and rear fans (300) and (400) And the wing 320 of the front fan 300 has a tip 322 of the wing 320 that has a backward deflection angle and the front fan 300 has a rear fan 300. The front fan 300 is coupled to the rotating shaft 110 of the driving motor 100, The wings 420 of the wings 420 have a forward deflection angle.

A vehicle cooling fan assembly of the present invention includes a drive motor (100) having a rotation shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); A hub 310 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, (300) (400) having a plurality of blades (320) and (420) disposed radially on the outer periphery of the front and rear fans (300) and (400) And the wing 320 of the front fan 300 is gradually changed in the order of the backward direction and the backward direction from the forward direction of the pulley 321, And the wing 420 of the rear fan 400 gradually changes in the order of forward and backward from the rearward side of the blade 421 side to the front end of the blade 422 toward the tip 422 side, And a shape that is connected to the base.

Further, a blowing guide tube 240 may be further coupled to the front surface of the shroud 200 so as to extend from the ventilation hole 210.

The front and rear fans 300 and 400 may further include fan bands 330 and 430 connecting the ends of the blades 320 and 420.

Further, it is preferable that the front and rear fans 300 and 400 rotate in the same direction.

The cooling fan assembly for a vehicle according to the present invention is characterized in that the front and rear fans are disposed at both ends of the rotary shaft of the driving motor such that the blades are staggered so that the air volume generated by the front fan is effectively discharged by the rear fan, So that the cooling efficiency of the heat exchanger is increased.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 3 is an exploded perspective view of a cooling fan assembly for a vehicle according to an embodiment of the present invention, FIG. 4 is a side cross-sectional view of FIG. 3, and FIG.

3, the vehicle cooling fan assembly includes a driving motor 100 fixed to a shroud 200 having a ventilation hole 210, and a rotary shaft 110 of the driving motor 100 The front and rear fans 300 and 400 having a plurality of blades 320 and 420 arranged radially are connected at both ends.

The driving motor 100 is a driving source for blowing the front and rear fans 300 and 400, which will be described later, while rotating in the same direction for cooling the heat exchange medium passing through the inside of the heat exchanger of the vehicle.

The driving motor 100 may be configured such that the rotary shaft 110 protrudes forward and rearward so that the front and rear fans 300 and 400 can be coupled to both ends of the rotary shaft 110 .

The shroud 200 guides the air blowing generated by the front and rear fans 300 and 400 to be described later by the driving motor 100 and drives the driving motor 100 And is fixedly installed in the heat exchanger of the vehicle in a supported state.

The shroud 200 is provided with a ventilation hole 210 for guiding blowing air sucked in the center in the axial direction and has a rectangular shape corresponding to the shape of the heat exchanger so that the rear surface can contact the entire back surface of the heat exchanger. As a synthetic resin material. The drawing number 230 is a bracket for fixing the shroud 200 to a heat exchanger or the like.

Here, the ventilation hole 210 of the shroud 200 may surround the rear fan 400 with a small space around the rear fan 400 so as to increase the blowing efficiency of the rear fan 400, which will be described later, And is formed into a circular shape having a certain size.

The driving motor 100 is installed at the center of the ventilation hole 210 in a state where the shroud 200 is supported by a plurality of stator 221 extending in a central direction at a plurality of points on the inner circumferential surface of the ventilation hole 210, And a motor fixing portion 220 for fixing and supporting the motor fixing portion 220.

In addition, a blowing guide pipe 240 may be coupled to the front surface of the shroud 200 so as to extend from the ventilation hole 210.

The ventilation guide pipe 240 guides the air blowing air in the same manner as the ventilation hole 210 described above and reduces the wind pressure loss so as to increase the blowing efficiency of the front fan 300, ) Is formed by a circular tube having openings at both ends in such a manner that it can be surrounded by only a small space.

Although the air guide tube 240 is illustrated as being attached to the shroud 200 after the air guide tube 240 is removably formed in the embodiment of the present invention, the air guide tube 240 may be formed integrally with the shroud 200 Of course.

The front and rear fans 300 and 400 are rotary fans that rotate by the driving motor 100 to transfer the blowing air to the heat exchanger of the vehicle to cool the heat exchange medium circulating inside.

The front and rear fans 300 and 400 may be coupled to both ends of a rotary shaft 110 protruding forward and rearward of the driving motor 100 so as to rotate in the same direction.

The front and rear fans 300 and 400 include a hub 310 and a hub 410 coupled to both ends of the rotary shaft 110 of the driving motor 100, A plurality of vanes 320 and 420 are arranged radially.

Each of the hubs 310 and 410 of the front and rear fans 300 and 400 has a container shape in which the surface facing the drive motor 100 is open, And rotates the outer blades 320 and 420 by the rotational force of the driving motor 100. [

Here, it is preferable that the front and rear fans 300 and 400 rotate in the same direction.

In addition, it is preferable that the blades 320 and 420 of the front and rear fans 300 and 400 have the tip ends 321 and 421 of the wings 320 and 320, respectively.

6, the blades 320 and 420 of the front and rear fans 300 and 400 are gradually changed in the order of the backward and forward directions from the fore and aft directions 321 and 421, And has a shape connected to the rear side of the tip ends 322 and 422 side.

The front wings 300a, 400a, the rear wings 300b, 400b, and the front wings 300a, 400a and the rear wings 320a, 420a of the front and rear fans 300, And a center line ML defined by a line connecting the centers between the trailing edges 300b and 400b in the radial direction. As shown in the figure, the leading edge 300a (400a) of each of the vanes 320 and 420 has a root section 321 (421) and a root section 421 ) To the maximum backward angle at the tips (322) and (422) side.

In addition, the leading edge 300a (400a) starts at a first inflection point (r11) at which a deflection angle changes from forward to backward from the forward and backward directions (321) and (421) And a small section in which the direction is changed and the third inflection point r13 is changed back to the backward direction has the fluid injection region D.

In other words, the leading edge 300a (400a) of the wing 300 (400) has an angle of sweep 321 (321) between the backward regions of the tips 322 and 422 in the turning region 321 421 from the forward direction to the backward direction toward the tips 322, 422 side.

As shown in the drawing, the trailing edge 300b (400b) of the vanes 300 and 400 is also formed in the same pattern as the front edges 300a and 400a, that is, in the turning regions 321 and 421, 322 and 422 are formed in a shape that gradually changes from forward to reverse 321 and forward to forward and backward to the tips 322 and 422 side.

7, the wings 320 of the front fan 300 may be configured such that the tips 322 of the wings 320 have a backward deflection angle and the wings 320 of the front fans 300 have a wedge angle, The tip 422 of the wing 420 may have a forward deflection angle.

That is, the blade 320 of the front fan 300 gradually changes in the order of the backward direction and the forward direction from the forward direction of the blade 321 to the backward direction of the tip 322, The blade 420 may have a shape in which the angle of deflection gradually changes in the order of forward and backward from the rearward side of the mouthpiece 421 and is connected to the tip of the tip 422 side.

In addition, the front and rear fans 300 and 400 may be configured such that the blades 320 and 420 of the front and rear fans 300 and 400 are arranged alternately so as to easily discharge the air volume and increase the air volume. And is coupled to the rotating shaft 110 of the driving motor 100.

More preferably, each of the vanes 420 of the rear fan 400 is disposed at a mid-angle of the two adjacent vanes 320 of the front fan 300.

6, the center C of the hub 310 of the front fan 300 and the center of the two wings 320 passing through the respective centers of the ends where the two wings 320 and the hub 310 are in contact with each other, The center of the end portion where the blade 420 of the rear fan 400 and the hub 410 are in contact with each other is positioned on a straight line D representing an intermediate angle of the angle formed by the center axis A,

In order to prevent the wings 320 and 420 of the front and rear fans 300 and 400 from being deformed during rotation by the driving motor 100, And fan bands (330, 430).

The results of the airflow generated by the vehicle cooling fan assembly and the bending directions of the front and rear fans 300 and 400 and the vanes 320 and 420 of the front and rear fans 300 and 400 ) The results of the airflow generated according to the placement angle will be described.

In the test method, the driving motor 100 was rotated at 180W, 220W, and 260W, and the amount of air generated was measured. As a result, the results shown in Table 1 were obtained.

[Table 1]

The wing bending direction of the front and rear fans Whether front and rear fan wings overlap Drive motor
Power (W) 180 220 260 Conventional single fan air volume
(CMH) 1498 1646 1779 Mutual opposition Mutual overlap Total air volume
(CMH) 1533 1669 1763 Mutual opposition Interchange 1537 1671 1778 Mutually same Mutual overlap 1535 1675 1708 Mutually same Interchange 1554 1689 1804

When the blades 320 and 420 of the front and rear fans 300 and 400 are arranged in the same direction with the same warping direction as the experimental results shown in Table 1, The blades 320 and 420 of the fan 300 and 400 have a configuration in which the tips 321 and 421 of the blades 320 and 320 have a backward deflection angle and the blades 320 and 420 of the blades 320 and 420 are staggered It can be seen that the total amount of air generated due to the effective amount of air generated by the front fan 300 is effectively discharged by the rear fan 400.

As described above, the cooling fan assembly for a vehicle according to the present invention is configured such that the front and rear fans 300 and 400 are coupled to both ends of the rotary shaft 110 of the driving motor 100 such that the blades 320 and 420 are staggered The amount of air generated in the front fan 300 is effectively discharged by the rear fan 400, and the size of the total air volume is increased to increase the cooling efficiency of the heat exchanger.

1 is an exploded perspective view showing a conventional cooling fan assembly for a vehicle,

2 is a partially enlarged cross-sectional view showing a structure of a wing of a conventional cooling fan assembly for a vehicle,

3 is an exploded perspective view of a vehicle cooling fan assembly according to an embodiment of the present invention,

Fig. 4 is a side cross-sectional view when engaged in Fig. 3,

Fig. 5 is a front view when assembled in Fig. 3,

Fig. 6 is a schematic view showing the degree of superposition of wings of the front and rear fans shown in Fig. 3,

7 is a schematic view showing the degree of superposition of vanes of front and rear fans of a cooling fan assembly for a vehicle according to another embodiment of the present invention,

8 is a partially enlarged cross-sectional view showing a structure of a blade of a cooling fan assembly for a vehicle according to an embodiment of the present invention.

Description of the Related Art

100 ... Drive motor 200 ... Shuraood

300 ... front fan 400 ... rear fan

Claims (9)

A drive motor (100) having a rotary shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); And A hub 310 and a hub 410 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, Includes a front and a rear fan (300) (400) having a plurality of vanes (320) and (420) arranged radially, The front and rear fans 300 and 400 are coupled to the rotating shaft 110 of the driving motor 100 such that the blades 320 and 420 are staggered, The wings 320 and 420 of the front and rear fans 300 and 400 And a shape in which the bending angle gradually changes from forward to backward and forward directions from the incoming side (321) and (421) side to the rearward side of the tips (322) and (422). The method according to claim 1, The wing 420 of the rear fan 400 is disposed such that the center of the end where the wing 420 and the hub 410 contact with each other is positioned at an intermediate angle between two adjacent wings 320 of the front fan 300 And the cooling fan assembly is mounted on the vehicle body. The method according to claim 1, The blades 320 and 420 of the front and rear fans 300 and 400 are configured such that the tips 322 and 422 of each of the blades 320 and 320 have an angle of rearward deflection. . delete A drive motor (100) having a rotary shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); And A hub 310 and a hub 410 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, Includes a front and a rear fan (300) (400) having a plurality of vanes (320) and (420) arranged radially, The front and rear fans 300 and 400 are coupled to the rotating shaft 110 of the driving motor 100 such that the blades 320 and 420 are staggered, The blade 320 of the front fan 300 has a tip end 322 of the blade 320 having a backward deflection angle and the blade 420 of the rear fan 400 has a tip 422 of the blade 420, A cooling fan assembly for a vehicle having an angle of deflection. A drive motor (100) having a rotary shaft (110); A shroud 210 having a ventilation hole 210 at the center thereof and a motor fixing part 220 extending from the inner circumferential surface of the ventilation hole 210 by a plurality of stator 221 in the circumferential direction and fixing the driving motor 100, (200); And A hub 310 and a hub 410 coupled to both ends of the rotary shaft 110 of the driving motor 100 and coupled to the rotary shaft 110 of the driving motor 100, Includes a front and a rear fan (300) (400) having a plurality of vanes (320) and (420) arranged radially, The front and rear fans 300 and 400 are coupled to the rotating shaft 110 of the driving motor 100 such that the blades 320 and 420 are staggered, The blade 320 of the front fan 300 has a shape in which the angle of deflection gradually changes from forward to backward and forward from the blade 321 side to the backward side of the blade 322 side, Wherein the blade (420) of the rear fan (400) has a shape in which an angle of deflection gradually changes in a forward direction from a rearward side of the root (421) side to a rearward direction and is connected to a forward side of the tip (422) . The method according to claim 1, And a blowing guide pipe (240) is further coupled to the front surface of the shroud (200) so as to extend from the ventilation hole (210). The method according to claim 1, Wherein the front and rear fans 300 and 400 further comprise fan bands 330 and 430 connecting the ends of the blades 320 and 420. 7. The method according to any one of claims 1 to 6, Wherein the front and rear fans (300) (400) rotate in the same direction to each other.

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