KR101667407B1 - electric fan - Google Patents

Abstract

The fan of the present invention comprises a casing having a first opening at its center in the form of a frame and forming an inlet hole and a discharge hole around the inner and outer sides of the rim of the housing and having a space formed therein, A rotary part for sucking the outside air into the space by the inflow hole and discharging it to the discharge hole, and a second opening for communicating with the first opening hole provided in the front of the case, And a cover for discharging air to the outside.

Description

Fan {electric fan}

More particularly, the present invention relates to an electric fan, and more particularly, to an electric fan that rotates two rows of rotating blades vertically arranged facing each other in opposite directions and pulls a rear airflow by a difference in air pressure in a space formed between the two rotating blades To increase the air volume and wind speed.

Conventional household fans typically include a set of vanes or vanes mounted to rotate about an axis, and a drive device that rotates the set of vanes to create an air flow. A "wind chill" or breeze is generated by the movement and circulation of the air flow, which results in the user experiencing a cooling effect as heat is dissipated through convection and evaporation.

These fans are available in various sizes and shapes. For example, in the case of a ceiling fan, it may have a diameter of at least 1 m and is typically mounted in a suspended manner in the ceiling to provide a downward air flow to cool the room. On the other hand, desk-top fans are often about 30 cm in diameter and are generally free-standing and portable. A floor standing tower fan typically includes a long vertical extension case of approximately 1 meter height and is typically used to create more than one set of airflows in the range of 300 to 500 l / Accommodates a rotary wing. An oscillating mechanism may be employed to rotate the outlet from the tower-type fan so that the airflow flows over a large area of the room.

The conventional fan or tower fan has a disadvantage in that a relatively high output motor is adopted because the discharge amount of wind is determined in relation to the number of revolutions of the rotary vane.

That is, the factor determining the wind strength is determined by the size and the number of revolutions of the fan, but it is impossible to prevent the decrease in the output relative to the input of the energy used by the motor. It is urgent to propose a technology that doubles the century.

In order to solve the above-mentioned problem, the fan of the present invention has the effect of increasing the effective blowing distance by increasing the lift of the airflow by rotating the two rows of rotating blades arranged opposite to each other in opposite directions.

It is also an object of the present invention to provide an apparatus and a method for installing a rotary vane by rotating a rotary vane in two rows and then rotating the rotary vanes in opposite directions by an air pressure generated by two rotary vanes, The airflow behind the space is pulled to increase the air volume and the wind speed.

It is another object of the present invention to further increase the wind velocity and the air flow rate by the airflow flowing along the second opening hole when the amount of air delivered through the rotary vane is discharged to the outside through the discharge hole.

In order to accomplish the above object, the fan of the present invention includes a case having a first opening hole at the center thereof and having an inlet hole and an exhaust hole formed around the inner and outer sides of the rim of the frame, And a second opening communicating with the first opening is provided in the front of the case, and the second opening is provided to communicate with the first opening, And a cover for discharging air from the inside of the second opening hole to the outside through the opening.

According to the present invention, the second opening is formed so that the inner surface is inclined forwardly.

According to the present invention, the spaces are formed in two rows spaced apart from each other, and the rotary vanes are vertically arranged in the respective spaces.

According to the present invention, the spaces in the second row and the second row are connected to each other and the rotary wings are installed in the respective horizontal and vertical directions.

According to the present invention, the rotary vane is coupled to the space through a bracket, the bracket including: a joint having a length; a fixing part having a joint hole formed at an upper portion of the joint and engaged with the shaft; And a connection bracket which is integrally fixed to the fixing bracket formed in the space by forming a connecting portion on the fixing portion and the receiving portion.

In order to solve the above-described problem, the fan of the present invention has a case and a cover having a frame shape, and then the rotating blades are installed in two rows on opposite sides of the space, So that the effective blowing distance is increased as the lift increases.

In the fan of the present invention, the two rows of rotating blades arranged opposite each other are rotated in the opposite directions, and at the same time, the air pressure generated by the two rotating portions causes a difference in pressure of the first opening formed between the two rotating blades There is an effect that the air flow in the rear direction is pulled to increase the air flow rate and wind speed.

That is, the air pressure in the first opening of the case is increased, and the air velocity and the air flow rate are doubled by the air flow flowing along the second opening when the air flows out at a high flow rate to the discharge hole.

In addition, the fan of the present invention has an effect of determining or increasing the delivery amount of the plurality of rotary blades compared to the length of the rotary blades.

In addition, the fan of the present invention has an effect of adjusting the blowing direction through the pressure difference when the number of revolutions of the rotary blades provided in two rows is rotated differently.

In addition, the fan of the present invention has the effect of improving the manufacturing efficiency by allowing the rotary blades to be installed through the bracket in order to easily install the rotary blades in the space inside each of the line segments formed in the case of the annular shape.

1 is a perspective view showing a fan according to a first embodiment of the present invention;
2 is an exploded perspective view showing a fan according to a first embodiment of the present invention;
3 is a sectional view showing a fan according to the first embodiment of the present invention.
4 is a perspective view illustrating a fan according to a second embodiment of the present invention;
5 is a sectional view showing a fan according to a second embodiment of the present invention.
6 is a graph comparing blowing distances and air blowing widths of the fan of the present invention and a fan to be compared.
FIG. 7 is a graph comparing the blowing distances with respect to the pressure of the fan of the present invention and the fan of the present invention.
8 is a three-dimensional graph comparing the blowing distance and the blowing width of the fan of the present invention with that of the comparative fan.
9 is a graph comparing blowing distances according to the first and second embodiments, which are classified according to the first opening shape of the fan according to the embodiment of the present invention.

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

First, in the drawings, it is noted that the same components or parts are denoted by the same reference numerals as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

FIG. 1 is a perspective view showing a fan according to the present invention, FIG. 2 is an exploded perspective view showing a fan according to the present invention, FIG. 3 is a sectional view showing a fan according to the present invention, And FIG. 5 is a cross-sectional view illustrating a fan according to another embodiment of the present invention. FIG. 6 is a graph comparing the blowing distance and the blowing width of the fan of the present invention with that of the comparative fan, FIGS. 8A, 8 B, and C are three-dimensional graphs comparing blowing distances and air blowing widths of the fan of the present invention with the fan of the present invention. FIG. FIG. 5 is a graph comparing blowing distances according to the first and second embodiments, which are classified according to the first opening shape of the embodiment. FIG.

1 to 5, an electric fan 100 of the present invention includes a case 110, a cover 120, and a rotation unit 130.

The case 110 is formed in a polygonal frame shape, and the case 110 has at least one polygonal line segment.

Alternatively, in the present invention, a case 110 having a rectangular shape with two line segments or four line segments is described, but the shape is not limited.

That is, in the first embodiment of the present invention, the case is provided so as to be arranged in two rows so as to face the two rotating parts, and in the second embodiment, the four rotary parts are separately arranged in each line segment of the case having a substantially tetragonal shape do.

Specifically, as shown in FIG. 4, the first embodiment has a streamlined case 110, and a space 111 is formed on both sides of the case 110. In each of the spaces 111, the rotating blades 132 are vertically Install it.

Alternatively, as shown in FIG. 1, the case 110 of the rectangular shape has the space 111 in which the ends of the segments in the second row and the second row are connected to each other, and the rotary part 130 in the horizontal and vertical directions Install it.

The case 110 having such a polygonal shape is annular in its entirety and is formed so as to penetrate the first opening 114 at the center.

Here, the body of the polygonal case 110 is referred to as a frame.

In the case 110 described in the first and second embodiments, an inlet hole 112 is formed on the outer surface of the rim and a discharge hole 113 is formed on the inner surface of the case 110. The inlet hole 112 and the discharge hole 113 communicate with the space 111 do.

Here, a first opening is formed in the center of the case of the first embodiment and the second embodiment.

In the space 111, the rotary part 130 is provided with a rotary blades 132 having a plurality of blades 132a at the outer periphery thereof and rotated by the power means 133 to suck outside air into the space 111 through the inflow hole 112, .

In particular, the rotary vane 132 has a plurality of vanes 132b radially formed on the outer periphery of a shaft 132a having a length.

The power unit 133 is installed in each of the rotating blades 132 so that the rotating shaft 132a of the motor and the shaft 132a of the rotating blades 132 are connected to each other by a direct power method so that the rotating blades 132 can be rotated by the rotating force generated by the power unit 133.

Further, in the second embodiment, the rotary vane 132 is coupled to the space 111 through the bracket 140.

The bracket 140 includes a joint portion 141 and a fixing portion 142, a receiving portion 144, and a connection bracket 145.

That is, the joint portion 141 has a length and is equal to the length of the rotary blade 132.

The fixing portion 142 has a joint hole 143 formed to be bent at an upper portion of the joint portion 141 and engaged with the shaft 132a.

The receiving portion 144 is bent at a lower portion of the joint portion 141 and is engaged with the lower portion of the power means 133.

In addition, the connection bracket 145 is integrally fixed to the fixing bracket 115 formed in the space 111 by forming connection portions to the fixing portion 142 and the receiving portion 144, respectively.

The connection bracket 145 of the bracket 140 is coupled to the fixing bracket 115 of the space 111 so that the bracket 140 is installed inside the space 111. Between the joint portion 141 of the bracket 140 and the fixing portion 142, there is provided a rotary blade 132 on which the power means 133 is mounted.

As a result, the rotary blades 132 can be installed through the brackets 140 in order to easily install the rotary blades 132 in the spaces 111 formed in the respective line segments formed in the ring-shaped case 110, thereby improving the manufacturing efficiency.

When the rotary blades 132 are rotated in opposite directions through the power means 133, the fan 100 of the first embodiment and the second embodiment configured as described above allows the outside air to flow into the space 111 through the inflow hole 112, .

The cover 120 has a second opening 121 communicating with the first opening 114 so as to be opposed to the front of the case 110 so that air is discharged from the inside of the second opening 121 through the exhausting hole 113.

At this time, the second opening hole 121 is formed so that the inner surface thereof is inclined forwardly.

This is because the air discharged through the at least one discharge hole 113 is partially merged while moving toward the second aperture 121 side through the first aperture 114, so that the flow velocity of the air is rapidly increased.

That is, the air pressure is lower on the first opening hole 114 side of the case 110 having a higher air velocity, and the air pressure on the side of the second opening hole 121 is relatively higher. As a result, since the force of the air acts as a low pressure in the high pressure, the air having a high speed passing through the case 110 passes the outside air together to form a constant and strong airflow, thereby generating wind.

As a result, the fan 100 of the present invention has the frame 110 and the cover 120 coupled to each other, and then the rotating part 130 is installed in the inner space 111 to suck outside air through the inflow hole 112 to raise the inner pressure of the space 111, So that the air around the cover 120 passes through the cover 120 to generate an airflow, thereby increasing the flow velocity of the air by the difference in air pressure and discharging the air to the outside, There is an effect.

In other words, the case 110 having the frame shape and the cover 120 are coupled to each other, and then the rotating blades 132 are installed in two rows on opposite sides of the inner space 111 so that the rotating blades 132 rotate in mutually opposite directions to increase the lift of the airflow The effective blowing distance is increased.

In addition, by rotating the two rows of rotating blades 132 opposed to each other in opposite directions and by the air pressure generated by the two rotating blades 132, by the air pressure difference of the first opening 114 formed between the two rotating blades 132 There is an effect that the air flow in the rear direction is pulled to increase the air flow rate and wind speed.

That is, when the inner pressure of the first opening hole 114 of the case 110 is increased and the air having a high flow rate is discharged to the discharge hole while being discharged to the outside, the air flow and the air flow rate are further doubled by the airflow flowing along the second opening hole 121 There is.

In addition, there is an effect that the delivery amount of the plurality of rotary blades 132 can be determined or doubled.

In addition, if the number of revolutions of the rotary blades 132 installed in two rows is rotated differently, the airflow direction can be adjusted through the pressure difference.

The effect of the present invention will be demonstrated through experiments as follows.

First, the fan is provided with a rotary blade 132 having a plurality of blades 132b formed on the outer periphery of a circular shaft 132a, and is rotated through power means and driven under the conditions shown in the following table.

Voltage (V)
Current (A)
Revolutions
(RPM)
Maximum pressure
(mmAq)
Minimum airflow
(m ³ / min)
Air volume
(CFM)
noise
(dBA)
12
0.30
2500
2.5
1.4
49
33

Here, in the comparative example, the rotary blades 132 are vertically arranged in one row, and in the embodiment, the rotary blades of two rows arranged vertically so as to face the rotary blades are rotated in opposite directions to each other.

FIGS. 6 and 7 are graphs showing the results of the air flow rate, blowing distance and width of the comparative example and the embodiment when the rotary blades are driven under the same conditions as described above.

6 is a graph comparing the blowing distances and the blowing widths of the comparative example and the embodiment, and it is understood that the blowing width and the blowing distance of the embodiment are much longer than those of the comparative example.

That is, the blowing distance L1 of the comparative example is 410 cm, the blowing width W1 is 13 cm, while the blowing distance L2 of the embodiment is 600 cm and the blowing width W2 is 23 cm.

The blowing distance and the blowing width have an effect proportional to the blowing area and the wind speed, which means that the blowing effect of the embodiment is much better than that of the comparative example.

FIG. 7 is a graph showing blowing distances versus pressure of the comparative example and the embodiment. It can be seen that the blowing distance of the embodiment is much longer than that of the comparative example even at low pressure values around the axis of the rotating blades.

That is, in the comparative example, the rotary blade axis pressure was 3.7 (mmAq), the pressure of the example was 2.7 (mmAq), the pressure of the embodiment was lower than the pressure of the comparative example, Is 600 cm, and it can be seen that the blowing distance is different.

8A, 8B, and 8C are three-dimensional graphs showing the blowing distances, the blowing widths, and the pressure comparisons of the comparative example and the example.

8A is a three-dimensional graph comparing the blowing distances, the blowing widths, and the pressures of the comparative example and the example, FIG. 8B is a graph comparing the blowing distances by showing the plane state of the graph of FIG. 8A, And the blowing widths are compared with each other.

As shown in Figs. 8A, 8B and 8C, the blowing widths and the blowing distances L2 and W2 of the embodiment are much longer than the comparison examples L1 and W2.

In particular, in the comparative example in FIG. 8B, the straightness of the blowing air is lowered, and the blowing direction tends to be deviated in one direction. In the embodiment, the straightness of the blowing air can be ensured and a longer blowing distance can be ensured.

9 is a graph showing the difference in straightness of the blowing air depending on whether or not the first opening hole and the second opening hole exist in the embodiment.

That is, in the first and second embodiments, the rotating blades of two rows arranged vertically so as to face the rotating blades are rotated in mutually opposite directions. In the first and second embodiments, the rotating blades of the second and third embodiments, And the second embodiment is a graph comparing the blowing distances in the state where the second apertures are not formed.

In the first embodiment, the pressure difference between the rotary blades is generated and the straightness of the airflow is much higher than that of the second embodiment, so that the blowing distance is significantly higher through the second opening.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

100: Fan 110: Case
111: space 112: inflow hole
113: exhaust hole 114: first opening hole
115: Fixing bracket 120: Cover
121: second aperture hole 130:
132: rotation blade 132a:
132b: wing 133: power means
140: Bracket 141: Joint
142: Fixed Government 143:
144: Support part 145: Connection bracket

Claims (4)

A case having a first opening at the center in the form of a frame and forming an inflow hole and a discharge hole around the inner and outer surfaces of the frame and forming a space therein,
The rotary vanes are rotated in mutually opposite directions by the power means so that the rotary vanes are vertically installed so as to face each other in two rows so as to suck outside air into the space by the inlet holes A rotating portion for discharging the air stream to the discharge hole and drawing the air stream to the rear side through the first opening hole,
And a second opening communicating with the first opening, wherein the second opening is formed obliquely in a shape in which an inner surface is expanded forward, and the air flow and the first opening And a cover for allowing the rear airflow of the ball to be merged and discharged to the outside through the second opening.
And a space is formed in the inside of the frame, wherein the space of the second row and the second row is connected to each other so that the space is divided into upper and lower spaces A case formed so as to be divided into right and left,
And a rotary blade coupled to the shaft in a horizontal and vertical direction is provided in each of the spaces having the two rows and two rows of lines and is rotated by the power means to suck the outside air into the space by the inflow hole, A rotating part for drawing airflow behind the ball through the ball,
And a second opening communicating with the first opening, wherein the second opening is formed obliquely in a shape in which an inner surface is expanded forward, and the air flow and the first opening And a cover for allowing the rear airflow of the ball to be merged and discharged to the outside through the second opening.
3. The method according to claim 1 or 2,
Wherein the rotary part coupled to the space comprises a plurality of rotary blades radially formed on the outer periphery of the shaft, and the shaft and the power unit are electrically coupled to each other.
3. The method according to claim 1 or 2,
Wherein the rotary vane is coupled to the space through a bracket,
The bracket
A joint having a length,
A fixing part formed on the upper part of the joint part so as to be bent and having a joint hole to be engaged with the shaft,
A support portion formed to be bent at a lower portion of the joint portion and coupled to a lower portion of the power means,
And a connection bracket formed integrally with the fixing bracket formed in the space by respectively forming a connection portion in the fixing portion and a receiving portion.

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