KR102065519B1 - A Fan Able to Make Sounds and Adjust Pitch Angle - Google Patents

Abstract

The present invention relates to a fan structure capable of reproducing sound and having a variable wing pitch and a control method thereof, wherein the fan extends radially from the hub 30 and is rotatably supported by the hub 30, A pivot shaft 51 coupled to the blade 40 and pivoting together with the blade 40; A magnet (79) installed on the blade (40) at a position off the extension line of the pivot shaft (51); And an electromagnet coil 91 for applying electromagnetic force to the magnet 79 to rotate the blade 40 about the pivot shaft 51. By adjusting the type, amplitude, frequency, etc. of the power supplied to the electromagnet coil, it is possible to adjust the angle of attack of the blade and to reproduce the sound while the fan is rotating.

Description

Fan Able to Make Sounds and Adjust Pitch Angle

The present invention relates to a fan, and more particularly to a fan structure capable of reproducing sound and variable vane pitch.

The fan is a rotating body that produces a flow of air. As the fan rotates, air flow occurs because the surface of the blade pressurizes the air.

When a person lives together in an environment in which a fan is installed, the noise accompanying the rotation of the fan is a factor that hinders a person's living environment. Therefore, efforts to reduce noise generated by the fan are required.

The fan rotating at constant speed can be designed to optimize the blade shape of the fan to minimize the noise to some extent. However, if the rotational speed of the fan is to be varied, the blade shape optimization design of the fan is not valid.

Meanwhile, active noise cancellation methods have been studied to reduce fan noise.

The conventional active noise canceling device is usually composed of a combination of a noise measuring microphone, a microphone of interest, an anti-noise speaker, an adaptive filter, and the like.

The noise measuring microphone senses an acoustic signal transmitted from the fan in a state in which it is disposed in the vicinity of the noise source, that is, the fan, converts the acoustic signal into an electrical reference signal, and converts the converted reference signal into an adaptive filter. It plays a role of input.

The microphone of interest senses an acoustic signal transmitted from the pen in a state of interest, that is, placed in a restricted position for controlling noise, and then converts the acoustic signal into an electrical error signal and converts the converted error signal. Inputs to adaptive filter.

The adaptive filter controls the inverse noise speaker in consideration of a reference signal, an error signal, and the like input from a noise measuring microphone, a microphone of interest, and the like.

Inverse noise speaker generates a series of inverse noises with the same size as the fan noise but with a phase difference of about 180 degrees under the control of this adaptive filter, inducing the noise output from the fan to be below a certain level. .

In the conventional active noise canceling device having such a structure, in particular, the acoustic emission path from the inverse noise speaker to the microphone of interest has a great meaning. This is because the overall reverse noise speaker control process of the adaptive filter is greatly influenced by how accurately the acoustic emission path from the reverse noise speaker to the microphone of interest is modeled.

However, since the inverse noise speaker and the microphone of interest constituting such a conventional active noise canceling device are generally arranged without being exposed to an open space without any limitation, there are various kinds of acoustic emission paths between the two. Will have no choice but to work. As a result, the acoustic emission path between the reverse noise speaker and the microphone of interest becomes complicated, and as a result, the adaptive filter cannot accurately model the acoustic emission path between the reverse noise speaker and the microphone of interest.

If the modeling is inaccurate, the adaptive filter will not accurately proceed with the overall inverse loudspeaker control process, which in turn will not reduce the fan noise.

The present invention has been made to solve the above problems, it is possible to minimize the generation of noise by generating vibration directly to the blade (wing) of the fan that causes the noise, and to increase the efficiency of the fan to increase the efficiency of the fan Correspondingly, an object of the present invention is to provide a fan structure capable of adjusting the angle of attack of a blade and having a function of a speaker itself and a control method thereof.

In order to solve the above problems, the present invention, the rotating shaft 20, the hub 30 is installed on the rotating shaft 20 to rotate together with the rotating shaft 20, and extends in the radial direction from the hub (30) In a fan comprising a blade 40 that rotates with the hub 30 to generate fluid flow, the fan: extends radially from the hub 30 and is rotatable to the hub 30. A pivot shaft 51 which is supported and coupled to the blade 40 and pivots together with the blade 40; A magnet (79) installed on the blade (40) at a position off the extension line of the pivot shaft (51); And an electromagnet coil 91 for applying electromagnetic force to the magnet 79 to rotate the blade 40 about the pivot shaft 51.

The pivot shaft 51 may be fixed to the hub 30 through a bearing 21 or a bushing.

The electromagnet coil 91 may be installed at the fixed end (F).

The magnet 40 is installed at the radially outer edge of the blade 40, the electromagnet coil 91 is in the form of a ring adjacent the blade 40 and the outer edge and surrounding the outer periphery of the fan Can be.

The electromagnet coil 91 may be embedded in a rim surrounding the radially outer edge of the blade 40.

The pivot shaft 51 may be connected to the hub 30 through a damper 77 or an elastic member.

A pivot linking unit 52 is provided at the hub side end of the pivot shaft 51, and the plurality of pivot linking units 52 may be connected to each other by an interlocking member 80.

The pivot linking unit 52 may include a plate 521 provided perpendicular to the pivot shaft 51 and a guide groove 522 provided on the plate 521.

The interlocking member 80 may be connected to the hub 30 through a damper 77 or an elastic member.

The interlocking member 80 includes a radially extending member 82 extending radially within the hub 30, and at the outer end of the radially extending member 82, the pivot linking portion 52. The protrusion 83 can extend outwardly to engage with it.

The interlocking member 80 further includes an axially extending member 81 extending axially from the radially extending member 82, wherein the axially extending member 81 includes the hub 30 and a damper. 77 or via an elastic member.

The damper is an annular plate having a wave shape in the radial direction, the inner edge of which is connected to the axial extension member 81, the outer edge of the damper may be connected to the hub (30).

The interlocking member 80 includes a first interlocking engagement portion 83, and the pivot interlocking portion 52 slidably engages with the first interlocking engagement portion 83 and the second interlocking engagement portion 522. ) May be provided.

In addition, in order to solve the above-described problems, the present invention, as a control method of the fan, by applying a direct current power to the electromagnet coil 91 to move the magnet 79 in the first direction, the blade 40 Provided is a fan control method for maintaining a pivoted state in three directions.

In addition, the present invention, by applying an alternating current power to the electromagnet coil 91 by vibrating the magnet 79 in a second direction that is opposite to the first direction, the blade 40 is opposite to the third direction The present invention provides a fan control method for generating sound by pivoting vibration in a fourth direction.

In addition, the present invention provides a fan control method for applying an alternating current power to the electromagnet coil 91 together with a direct current power source.

In addition, the fan may be operated by rotating the rotation shaft 20 of the fan.

According to the fan structure of the present invention, by inducing vibration of the blade itself, active noise can be removed, and the sound can be generated from the blade itself, which can be utilized for various purposes.

In addition, according to the present invention, it is possible to continuously adjust the angle of attack of the blade even in the rotation of the fan, it is possible to set the optimum blade angle of attack according to the rotation speed of the fan, it is possible to increase the efficiency of the fan and minimize the noise.

In addition, according to the present invention, as the fan rotates, the angle of attack of the blade can be adjusted to a predetermined position, and at the same time, active noise cancellation or sound can be generated.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a front view of a fan according to the present invention.
Figure 2 is a perspective view showing a II cross-section, omitting the rim in FIG.
FIG. 3 is a view of the hub, not shown in FIG. 2, seen in the II direction.
4 is a view showing a state in which the angle of attack of the blade of the fan according to the present invention is changed.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only this embodiment to make the disclosure of the present invention complete and to those skilled in the art to fully understand the scope of the invention It is provided to inform you.

In addition, in the present invention, directions such as up, down, left, and right should be understood as relative concepts.

[Fan Structure]

As an embodiment of the present invention, the fan is connected to the drive unit 10 installed at the fixed end F, the drive shaft 11 rotated by the drive unit 10, the drive shaft 11 and the coupler 12. The rotating shaft 20 receives the rotational force from the drive shaft 11, the bearing 21 is fixed to the fixed end (F) to support the rotation of the rotating shaft 20, the shaft is installed on the rotating shaft 20 together with the shaft Rotating hub 30, a plurality of blades (40) extending radially from the hub (30) and a rim (90) surrounding the radially outer circumference of the blade (40) is installed at the fixed end (F) Include.

The driving unit 10 may be a motor installed at the fixed end (F). When the motor provides the rotational force, the drive shaft 10, coupler 12, the rotating shaft 20, the hub 30 and the blade 40 in the rotary stage (R) rotates. Blade 40 rotates with hub 30 to generate fluid flow.

2 illustrates an external motor structure in which the driving unit 10 is located outside the fan. However, the arrangement of the driving unit 10 of the present invention is not limited thereto. For example, a hollow structure may be provided inside the hub 30, and a motor structure in which the driving unit 10 is built in the hollow portion may be applied.

According to the present invention, a magnet 79 may be installed on the blade 40 positioned at the rotary end R, and an electromagnet coil causing vibration to the magnet 79 may be installed on the fixed end F side. The electromagnet coil 91 may have a structure embedded in a rim. The electromagnet coil 91 may be a coil wound around a fixed bobbin, or may have a self-bonded structure.

[Pivot Support Structure of Blade]

The blade 40 is provided with a plurality of equal intervals radially with respect to the hub (30). The blade 40 is pivotally fixed instead of being integrally fixed to the hub 30. For this purpose, a pivot shaft 51 is installed on the blade 40.

The pivot shaft 51 may be shaped to be embedded and fixed in the blade 40. The central shaft portion of the inner end of the blade 40 is provided with a hollow shaft receiving portion 41 for receiving the pivot shaft 51, the pivot shaft 51 is accommodated in the shaft receiving portion 41 is fixed. . Various fastening structures may be applied between the pivot shaft 51 and the shaft accommodating portion 41 so that relative rotation is limited. For example, a fastening structure that restricts relative rotation, such as a key and keyway structure, a D-cut structure of the shaft, and a pin or screw coupling perpendicular to the pivot axis, may be applied. Therefore, when the pivot shaft 51 is pivoted, the blade 40 is also pivoted together.

The pivot shaft 51 is rotatably supported by the hub 30. The hub 30 includes a body 31 firmly fixed to the rotation shaft 20, and a cover 32 covering an upper portion of the body 31. The pivot shaft 51 may be supported by a bearing 53 or a bushing. The bearing 53 is fixed to the pivot support 35 provided in the hub 30, that is, the bearing housing.

The pivot support part 35 receives and supports the bearing 53 in a state in which the body 31 and the cover 32 of the hub 30 are coupled to each other. That is, half of the bearing 53 is matched to the bearing housing provided in the body 31, and the other half of the bearing 53 is matched to the bearing housing provided in the cover 32.

The pivot shaft 51 extends from the blade 40 toward the center of the hub 30 and passes through the hole 351 of the bearing housing 35 of the hub 30. Since the inner surface of the blade 40 which fills and surrounds the pivot shaft 51 has a larger cross section than the pivot shaft 51, the inner surface of the blade 40 has a pivot shaft 51 provided in the bearing housing. ) Interfering with the through hole. This prevents the blade 40 from moving toward the inside of the hub 30. Of course, since the blade 40 receives centrifugal force when the hub 30 and the blade 40 rotate, there is no fear that the blade 40 moves inside the hub 30 at least during the rotation.

The inner end of the pivot shaft 51 is disposed in an inner space of the hub 30, that is, a space defined by the body 31 and the cover 32. An inner end portion of the pivot shaft 51 is provided with a pivot linking unit 52 having a planar shape perpendicular to the pivot shaft 51. The pivot linking unit 52 has a larger cross-sectional area than the pivot shaft 51. Therefore, the pivot linking unit 52 interferes with the through hole 352 of the pivot shaft 51 provided in the bearing housing. Accordingly, even if the hub 30 rotates and the centrifugal force is applied, the pivot shaft 51 does not fall out of the hub.

The blade 40 is pivotally fixed to the hub 30 together with the pivot shaft 51 while constraining movement in the radial direction of the hub. That is, the blade 40 of the embodiment, as shown in (a) of FIG. 4 may be pivoted in a state in which the angle of attack (C) is gently laid down, and as shown in (b), the angle of attack (C) stands steeply. May be pivoted.

As will be described later, the plate 521 constitutes a pivot linking unit 52.

[Pivot Drive Structure of Blade]

A plurality of blades 40 are disposed radially in the fan. Since the blade 40 is a wind-producing part, it is preferable that not only the shape of all the blades 40 but also its angle of attack match. Therefore, it is preferable that the plurality of blades 40 operate in synchronization with each other.

The pivot drive of the blade 40 of the present invention is accomplished by the interaction of the electromagnet coil 91 with the magnet 79. To this end, a magnet 79 is installed at the fan radially outer edge of the blade 40, and the electromagnet coil 91 is adjacent to the outer edge of the blade so as to be adjacent to the magnet 79, and the outer circumference of the fan is fixed. It is provided in the form of an enclosing circular ring.

The magnet 79 may be installed in the blade 40 in a form embedded in the blade 40, so that the magnet 79 may not affect the surface profile of the blade generating the flow of the fluid.

The magnet 79 is subjected to a force in a direction parallel to the axis of rotation by an electromagnet coil embedded in the rim 90 (see Fig. 4). Therefore, when the magnet 79 is disposed as far as possible on the extension line of the pivot shaft 51, even if the force acting on the magnet 79 by the electromagnet coil 91 is small, the blade is centered on the pivot shaft 51. The moment to rotate is generated enough.

Referring to FIG. 1, the blade 40 is gradually wider from the hub 30 toward the rim 90, so that the magnet 79 is positioned at the radially outer edge of the blade 40 in its width direction. When placed at the edge, it is disposed very close to the electromagnet coil 91 to receive the electromagnetic force more effectively, and is located far away from the pivot axis 51 of the blade, so that the moment of pivoting the blade is generated as much.

1 illustrates a structure in which the magnets 79 are built in each of the plurality of blades 40. However, the magnet 79 may be embedded only in some of the plurality of blades 40. In addition, only one magnet 79 is not to be embedded in one blade 40, and may be installed at both edges of the pivot axis. Of course, at this time, the polarities of the two magnets 79 installed opposite to each other about the pivot axis should be arranged opposite to each other. In addition, the polarities of the magnets installed in the same position in the plurality of blades 40 should match each other. That is, all seven magnets 79 shown in FIG. 1 have polarities arranged in the same direction.

Since the rim 90 is installed at the fixed end F, it is easier to supply power to the electromagnet coil 91 embedded therein.

[Pivot Linkage of Blade and Main Angle of View Maintaining Structure]

On the other hand, the blade 40 rotates together with the hub 30 in the rotary stage (R). It is preferable for the air volume control and the noise control that the plurality of blades 40 are controlled so that their angle of attack C (see Fig. 4) all coincide. That is, the plurality of blades 40 must all have the same angle of attack to generate fluid flow, so that eccentricity does not occur, so that vibration and noise are minimized.

Therefore, the plurality of blades 40 are preferably pivoted in conjunction with each other, rather than being individually pivoted about the pivot axis 51. If the plurality of blades 40 has only a structure that is individually pivoted about the pivot axis 51, even if the same electromagnetic force is generated along the circumferential direction of the electromagnet coil 91, the magnets embedded in each blade 40 There is a fear that the angle of attack C of each blade 40 is different from each other due to a difference in magnetic force of 79 or other causes.

In addition, the plurality of blades 40 need to maintain the basic angle of attack C even in a state in which no power is supplied to the electromagnet coil 91, that is, no electromagnetic force is generated. Therefore, the plurality of blades 40 may be preferably connected to each other by an interlocking structure, and may maintain a basic angle of incidence in the state in which electromagnetic force is not applied to the magnets 79 of the blades 40. It is preferable that a structure for providing an external force is additionally configured.

1 to 3, the circumference of the cover 32 of the hub 30 supports the bearing 53 and covers the body 31, and the upper portion of the cover 32 is open (FIG. 3 shows a state in which the cover 32 of the hub 30 is omitted to show the internal structure.

A hollow space is provided in the hub 30, and an interlocking member 80 for interlocking pivot angles of the plurality of blades 40 is installed in the space.

The interlocking member 80 includes an axial extension member 81 extending in an axial direction parallel to the rotation shaft 20, a radial extension member 82 fixed to the axial extension member 81, and a radial direction. It includes a first interlocking engagement portion 83 provided on the outer circumference of the extension member (82).

The axial extension member 81 has a center thereof aligned with the rotation shaft 20 and may extend in the axial direction. A groove 811 may be provided on an outer circumferential surface of the axial extension member 81. The groove 811 of the axial extension member 81 may be provided at a position corresponding substantially to the open portion of the cover 32.

A damper 77 or an elastic member (spring) may be installed between the axial extension member 81 and the open portion of the cover 32.

According to an embodiment, the damper 77 may be an annular elastic plate having a wave shape in a radial direction. The outer circumferential surface of the damper 77 is connected to the hub 30 in a form fixed to the inner circumferential surface of the cover 32, and the inner circumferential surface of the damper 77 is inserted into the groove 811 of the axial extension member 81. It is connected to the axial extension member 81 in a fixed form.

Accordingly, the position of the axial extension member 81 is accurately maintained in the radial direction, the movement can be made within the range allowed by the damper 77 in the axial direction. That is, the damper 77 allows the movement of the axially extending member in the axial direction, but precisely regulates its position in the radial direction. As will be described later, if no current is applied to the electromagnet coil 90, the axial extension member 81 is returned to the default position by the restoring force of the damper 77.

Since the axial extension member 81 extends in the axial direction, even if the axial extension member 81 moves in the axial direction, the damper is an annular elastic plate except for the portion fitted to the groove 811. It does not interfere with (77).

According to an embodiment of the invention, it is illustrated that the damper 77 has a structure covering an open portion of the cover 32. However, the damper 77 may be provided at another position in the hollow portion inside the hub 30. Of course, if the damper 77 is installed in the open portion of the cover 32, there is an advantage that the installation of the damper 77 is easy.

The lower portion of the axial extension member 81 may include a bolt portion 812 having a thread formed on the outer circumference. The central portion of the radially extending member 82 is provided with a nut hole 821 having a thread formed on its inner circumferential surface. The nut hole 821 provided at the center portion of the radially extending member 82 is fastened and fixed to the bolt portion 812 of the lower portion of the axially extending member 81. At this time, the fastening depth of the radial extension member 82 is regulated by the stepped portion 813 provided on the upper portion of the bolt portion formed in the lower portion of the axial extension member 81.

The outer edge portion of the radially extending member 82 may have a shape that is thicker than the radially extending member 82 in the form of a plate. And the outer peripheral surface is provided with the projection 83 extended outward in the radial direction. The protrusion 83 may have a circular cross section.

The protrusion 83 is interlocked with the plate 521 of the pivot shaft described above. The pivot linking portion 52 of the pivot shaft includes a plate 521 including a surface provided at the inner end of the pivot shaft perpendicular to the pivot shaft 51, and a guide groove 522 formed on an inner surface of the plate 521. do.

2 to 4, the guide groove 522 may be provided in a straight form passing through the center of the plate 521 or the pivot shaft 51. The protrusion 83 is fitted into the guide groove 522 at a position eccentrically from the center O of the plate 521 or the pivot shaft 51.

Although the guide groove 522 is provided in the pivot shaft 51 and the protrusion 83 is provided in the amplitude interlocking part 80 in the embodiment of the present invention, the guide groove and the position of the protrusion are replaced with each other. Of course, the structure can be applied. In addition, if the interlocking structure that can convert the rotational movement of the pivot shaft 51 to the axial movement of the linking member 80, of course, it can be modified in various other forms.

The plurality of protrusions 83 provided on the outer circumference of the radially extending member 82 cooperate with all of the plurality of pivot interlocking portions 52 provided on the pivot shaft 51. Thus, the pivot movements of all the blades interlock with each other.

When power is applied to the electromagnet coil 91, the magnet 79 embedded in the blade 40 receives magnetic force in the first direction or the second direction according to the direction of the current, as shown in FIG. Direction, the blade 40 is rotated in the third or fourth direction about the pivot center (O). For example, as shown in FIG. 4A, when the magnet 79 receives a force in the first direction, the blade 40 rotates in the third direction. As shown in FIG. 4B, when the magnet 79 receives the force in the second direction, the blade 40 rotates in the fourth direction.

When the blade 40 rotates in the third direction or the fourth direction, the projection 83 which is inserted into the guide groove 522 and slides is moved in the first direction or the second direction parallel to the axial direction of the rotation shaft 20. do. Since the magnets 79 embedded in the plurality of blades 40 are all disposed in an equal magnetic field by the electromagnet coil 91, they are theoretically all subjected to the same force. However, even if there is a difference in the magnetic force of the magnets 79, the second interlocking portion 522 of the plurality of blades 40 are all mechanisms to be interlocked by the first interlocking portion 83 of the interlocking member 80. Since they are scientifically interconnected, all blades 40 can be pivoted to have the same angle of attack (C).

In order for the interlocking motion of the plurality of blades 40 to be smoothly performed, the interlocking member 80 is fixed relative to the hub 30 so as not to rotate relative to the hub 30. It is preferably supported to be movable.

When the current is supplied to the electromagnet coil 91 in one direction and the magnet 79 is subjected to an external force in the first direction indicated by the arrow in Fig. 4A, the blade 40 and the plate 521 are centered (O). Rotate in a third direction clockwise with respect to Then, as shown in (b) of FIG. 4, the blade 40 is erected to increase the angle of attack. In addition, the plurality of blades 40 all have the same angle of attack by the interlocking member 80 which integrally connects the protrusions 83 inserted into the guide groove 522.

On the other hand, when the current is supplied to the electromagnet coil 91 in the other direction and the magnet 79 is subjected to an external force in the second direction indicated by the arrow in Fig. 4 (b), the blade 40 and the plate 521 are centered. It rotates in a 4th direction counterclockwise with respect to (O). Then, as shown in (a) of FIG. 4, the blade 40 is erected to increase the angle of attack.

The magnitude of the angle of attack C may be determined by the magnitude of power applied to the electromagnet coil 91 and the current direction.

For example, in the state in which no power is applied to the electromagnet coil 91, the blade 40 may be at the basic angle of attack between the angle of attack shown in Fig. 4A and the angle of attack shown in Fig. 4B.

When the current is supplied to the electromagnet coil 91 in one direction, the blade 40 is pivoted to have a larger angle of attack than the basic angle of attack as shown in FIG. 4B, and the extent of the angle of attack is greater than that of the electromagnetic coil 91. It is determined by the amount of power applied to).

In addition, when the current is supplied to the electromagnetic coil 91 in the other direction, the blade 40 is pivoted so that the angle of attack is smaller than the basic angle of attack as shown in FIG. 4 (a), and the degree of angle of attack is smaller. It is determined by the amount of power applied to 91.

Since the electromagnet coil has an annular cross section and is disposed adjacent to the outer edge of the blade, even if the blade of the rotary end R rotates, it does not interfere with the electromagnet coil.

On the other hand, when AC power is applied to the electromagnet coil 91, the magnet 79 is subjected to a vibration force in the first direction and the second direction in the axial direction, and thus the blade 40 also vibrates pivoting. .

[Pivot Control Method of Blade]

Hereinafter, the above-described method for controlling the fan and the blade will be described.

When the drive shaft 11 is rotated by the motor 10, the rotating shaft 20 and the hub 30 connected to the motor shaft rotate together with the blades to function as a fan to generate the air volume.

If no power is applied to the electromagnet coil 91, the angle of attack of the blade 40 is maintained at the basic angle of attack by the damper 77, and all of these angles of attack are kept the same by the interlocking member 80. .

When a current flows by applying power to the electromagnet coil 91, the magnet 79 is forced in the axial direction by interaction with a magnetic force line of the electromagnet coil 91. The blade 40 is then pivoted to change the angle of attack, and they are interlocked by the interlocking member 80.

When a direct current power is applied to the electromagnet coil 91 in one direction, it is possible to control the angle of attack of the blade 40 according to the direction and intensity of the direct current power. This changes the flow characteristics of the fan. Changing the angle of attack of the fan in this way, it is easy to respond to the load.

On the other hand, when no more power is applied, the angle of attack of the blade 40 returns to the basic position by the restoring force of the damper 77.

When AC power is applied to the electromagnet coil 91, the blade 40 vibrates in the pivoting direction according to the size and frequency of the AC power. This vibration of the blade 40 generates sound. The louder the AC power is, the louder the sound is, i.e., the loudspeaker's output. The louder the AC power is, the louder the sound is. When AC power is applied in this way, the blade of the fan has the function of a speaker.

When a large DC power is applied to the electromagnet coil 91 and a small AC power is applied thereto, the angle of attack of the blade 40 is changed by the large DC power, and the AC power is determined based on the changed angle of attack. It pivots by, and the function of a speaker can also be exhibited together.

Since the driving of the power supply of the motor 10 and the DC power and the AC power provided to the electromagnet coil 91 are all controlled independently, the fan is used only as a function of a fan, only as a function of a speaker, or Both function and speaker function can be used, so the application expandability is very high. It is also possible to use the speaker function while adjusting the fan's angle of attack. And the speaker function can be used for active noise cancellation.

As described above, the present invention has been described with reference to the drawings exemplified, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made.

For example, in the exemplary embodiment of the present invention, the pivot shaft 51 of the plurality of blades is disclosed through the interlocking member 80 and connected to the hub 30 and the damper 77, but the pivot shafts of the respective blades ( 51 may be applied to the structure that is connected to the hub 30 through each damper (77). Of course, at this time, each damper 77 may have the same physical properties.

In addition, even if the above described embodiments of the present invention while not explicitly described and described the effect of the effect of the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

10: drive unit (motor)
11: drive shaft
12: Coupler
20: axis of rotation
21: bearing
30: Hub
31: body
32: cover
35: pivot support (bearing housing)
351: through hole
352 through hole
40: blade
41: bearing part
50: angle adjuster
51: pivot axis
511: step
52: pivot linkage
521: negative (plate)
522: guide groove (second interlocking coupling)
53: bearing
77: damper
79: magnet
80: linkage member
81: axial extension member
811 groove
812: bolt portion
813: stepped portion
82: radially extending member
821: nuthole
83: protrusion (first interlocking coupling)
90: rim
91: electromagnet coil
F: fixed end
R: rotary stage
O: pivot center
C: angle of attack

Claims (17)

The rotating shaft 20 rotated by the driving unit 10, the hub 30 is installed on the rotating shaft 20 and rotates together with the rotating shaft 20, and extends in the radial direction from the hub 30 to the hub ( A fan comprising a blade 40 that rotates with 30 to generate a fluid flow,
The fan is:
A pivot shaft 51 extending radially from the hub 30, rotatably supported by the hub 30, coupled to the blade 40 and pivoting together with the blade 40;
A magnet (79) installed on the blade (40) at a position off the extension line of the pivot shaft (51); And
Electromagnet coil 91 for applying electromagnetic force to the magnet 79 to rotate the blade 40 about the pivot shaft 51;
The magnet 79 is installed at the radially outer edge of the blade 40,
The electromagnet coil 91 has a ring shape adjacent to the outer edge of the blade 40 and surrounding the outer circumference of the fan,
The magnet (79) is a fan that is forced by the electromagnet coil (91) in parallel with the rotation axis.
The method according to claim 1,
The pivot shaft (51) is fixed to the hub (30) through a bearing (21) or bushing.
The method according to claim 1,
The electromagnet coil 91 is a fan installed in the fixed end (F).
delete The method according to claim 1,
The electromagnet coil (91) is a fan embedded in the rim (90) surrounding the radially outer edge of the blade (40).
The method according to claim 1,
The pivot shaft (51) is connected to the hub (30) through a damper (77) or an elastic member.
The method according to claim 1,
A pivot linking unit 52 is provided at the hub side end of the pivot shaft 51,
A plurality of the pivot interlocking portion 52 is a fan connected to each other by the interlocking member (80).
The method according to claim 7,
The pivot interlocking part (52) includes a plate (521) provided perpendicular to the pivot shaft (51) and a guide groove (522) provided on the plate (521).
The method according to claim 7,
The interlocking member 80 is a fan connected to the hub 30 and the damper 77 or an elastic member.
The method according to claim 7,
The interlocking member 80 includes a radially extending member 82 extending radially in the hub 30,
A fan (83) extending outwardly at an outer end of the radially extending member (82) to engage the pivot linking portion (52).
The method according to claim 10,
The interlocking member 80 further includes an axially extending member 81 extending axially from the radially extending member 82,
The axial extension member 81 is connected to the hub through the damper 77 or the elastic member.
The method according to claim 11,
The damper is an annular plate having a wave shape in a radial direction, the inner edge of which is connected to the axially extending member (81), the outer edge of the fan connected to the hub (30).
The method according to claim 7,
The interlocking member 80 includes a first interlocking coupling portion 83,
The pivot interlocking portion (52) is provided with a second interlocking engagement portion (522) slidably engaged with the first interlocking engagement portion (83).
As a control method of the fan of claim 1,
Applying a direct current power to the electromagnetic coil (91) to move the magnet (79) in the first direction to maintain the blade (40) is pivoted in the third direction.
The method according to claim 14,
By applying an alternating current power to the electromagnet coil 91 together with a direct current power source, the magnets 79 vibrate in a second direction opposite to the first direction and the opposite direction, so that the blade 40 is opposite to the third direction The fan control method for generating sound by pivoting in the fourth direction.
As a control method of the fan of claim 1,
By applying AC power to the electromagnet coil 91 to vibrate the magnet 79 in a second direction opposite to the first direction, the blade 40 in the fourth direction opposite to the third direction. How to control the fan to generate sound by pivoting vibration.
The method according to any one of claims 14 to 16,
Fan control method for operating the fan by rotating the rotating shaft (20) of the fan.

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