JPS6146678B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an electric fan, and more particularly to an electric fan in which aileron blades are provided on a front protective net.

[Background of the invention]

Natural wind has changes in its strength called wind breath, and this gives humans a pleasant sense of coolness. On the other hand, it is known that this effect is small because the wind from an electric fan has a constant velocity.

[Purpose of the invention]

The present invention has focused on the above, and an object of the present invention is to provide an electric fan that can generate wind close to natural wind with a simple configuration.

[Summary of the invention]

The present invention comprises a rotary blade and a front protection net that covers the front surface of the rotor blade, and a protection net shank is provided in the center of the front protection net, and inside the protection net shank there is provided a front protection net that covers the front surface of the rotor blade. an auxiliary vane consisting of a plurality of radial rectifier plates that rectify the incoming wind in the direction of the rotational axis, and an arc-shaped diffusion vane that is a selected part of these rectifier plates and is installed between at least two of the rectifier plates; is rotatably mounted, and the auxiliary blade is rotated by the wind generated by the rotary blade, and the number of rotations thereof is made lower than the number of turns of the wind caused by the rotary blade by a braking means. By adjusting the speed of the ailerons and adding a diffusion effect to the monotonous wind generated by the rotary blades, a complex wind similar to natural wind is obtained.

[Embodiments of the invention]

Hereinafter, one embodiment of the configuration of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, a protective net shank 2 is fixed to the center of a front protective net 1 of a rotary blade 9 by screws 3. As shown in FIGS. Inside this protective net decoration 2, there are a plurality of rectifying plates 4 and diffusion vanes 10, 11.
An auxiliary wing 5 having a auxiliary wing 5 is rotatably fixed using an elastic friction plate 6 and screws 7. The friction plate 6 and the screw 7 function as a braking means for the aileron 5. The protective net decoration 2 has a bearing column 2c in the center.
A bearing cylinder 5a at the center of the rectifying plate 4 is rotatably attached to this. In addition, the protective net decoration 2 has a hole 2a in the center and a hole 2b at a slightly eccentric position, and these holes 2a, 2b
A rotation stopping rod 8 can be selectively inserted into.

First, the effect of the aileron 5 when the rotation stop rod 8 is inserted into the hole 2b and hits the rib 5b at the center of the aileron 5 to prevent the aileron 5 from rotating will be described.

The baffle plate 4 is provided substantially radially around the rotational axis of the rotor blade 9. Therefore, the rotational direction component Vor and the blowing direction component generated from the rotor blade 9
The twisted wind Vo that Vos is synthesized from is this current plate 4
As a result, the flow becomes wind V ₁ which is corrected in the direction of the blowing direction component Vos. As a result, the air blowing direction component becomes V _1s and the rotational direction component becomes V _1r , and the rectification and speed are increased in the air blowing direction.

As shown in FIGS. 4 and 5, a plurality of diffusion vanes 10 and 11 are provided concentrically at the tips of at least two baffle plates 4 so as to be inclined outward in the air blowing direction. be.

If the baffle plate 4 and the diffusion vanes 10 and 11 are appropriately combined and constructed, the wind speed distribution on the front surface of the rotary vane 9 can be made to be partially strong or weak. That is, the wind speed increases at the front surface of the baffle plate 4, and the wind speed is diffused and weakens at the front surface of the diffusion vanes 10 and 11. When this is shown in a wind speed distribution map, as shown in Figure 6, in front of the baffle plate 4 there is a narrow wind with a large wind speed as shown by the solid line, but in front of the diffuser blades 10 and 11 there is a narrow wind with a wide width as shown by the dotted line. A wide light wind is obtained. Here, the wind speed distribution of the conventional electric fan is shown by a dashed line. Therefore, according to this configuration, the wind is narrow and strong in the vertical direction, and the wind is wide and weak in the horizontal direction, so it is possible to obtain a wind pattern different from the conventional wind which is uniform in concentric circles.

Next, in FIG. 3, insert the rotation stopper rod 8 into the hole 2b.
If removed from the ailerons 5, they become rotatable. In this case, at a location a predetermined distance away from the front of the electric fan, the wind automatically moves back and forth between the solid line and the dotted line shown in FIG. 6, and the wind feels like it changes in strength.
Also, at this time, if the rotation stop rod 8 is inserted into the hole 2a as shown in the figure, there is no risk of it being lost.

Further, the rotational speed of the ailerons 5 can be adjusted to match favorable wind changes. In the present invention, the surface pressure of the friction plate 6 is changed by changing the tightening force of the screw 7 in the braking means composed of the friction plate 6, the screw 7, etc., to cope with this.

Furthermore, by removing the screws 7, the aileron 5 can be removed from the front protective net 1, making it convenient for cleaning at the end of the season and for storage.

〔Effect of the invention〕

As described above, in the electric fan of the present invention, the ailerons having the baffle plate and the diffusion vane are rotatably provided in the protective net at the center of the front protective net, and the ailerons are rotated at low speed by the braking means. Because of this structure, it is possible to obtain a wind similar to that of nature.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the configuration of the main parts showing an embodiment of the present invention, Fig. 2 is a vector diagram of the wind caused by the rotor blade, and Fig. 3 is a diagram of the structure of the main parts showing an embodiment of the invention. Longitudinal cross-sectional view, Figure 4 is a front view of the aileron, Figure 5 is a front view of the aileron.
The figure also shows a sectional view of the aileron, and FIG. 6 shows the wind speed distribution diagram of the present invention and the conventional electric fan. 1... Front protection net, 2... Protection net decoration, 4...
...straightening plate, 5...aileron, 6...friction plate, 9...
Rotary blade, 10...Diffusion blade.

Claims (1)

[Claims] 1 comprises a rotary blade 9 and a front protection net 1 that covers the front surface of the rotor blade 9, a protection net decoration 2 is provided in the center of the front protection net 1, and the rotor blade is placed inside the protection net decoration 2. A plurality of radial rectifying plates 4 that rectify the wind sent from 9 in the direction of the rotation axis, and an arc-shaped rectifying plate that is a selected part of these rectifying plates 4 and is installed between at least two rectifying plates 4. An auxiliary vane 5 consisting of a diffusion vane 10 is rotatably attached, and this auxiliary vane 5 is rotated by the wind from the rotary vane 9, and its rotational speed is controlled by the control means by the rotary vane 9. An electric fan characterized by being adjusted so that the number of rotations of the wind is lower than the number of rotations of the wind caused by the electric fan.