KR101184038B1 - Air filtering cover for electric fan - Google Patents

Abstract

PURPOSE: An air purification cover for an electronic fan is provided to make wind generated by an electronic fan normally blow forward while having an excellent air purification function. CONSTITUTION: An air purification cover(100) for an electronic fan comprises a ventilation part(10), a filter part(20), and a first fastening part(30). The ventilation part is arranged to cover a safety net covering an electronic fan by being spaced from a fan blade. A first hole(12) is formed in the central part of the ventilation part. The filter part is arranged to cover the safety net by being joined to be adjacent to the ventilation part. The filter unit is made of a transparent or a semi-transparent material. A second hole is formed in the central part of the filter part. The first fastening part is arranged in an edge portion of the first hole.

Description

Air purification cover for electric fan {AIR FILTERING COVER FOR ELECTRIC FAN}

The present invention relates to an air purifying cover for a fan, and more particularly, having an excellent air purifying function, not only to allow the wind of the fan to go out normally, but also to easily and simply adjust the wind direction for the fan air purifying. It is about a cover.

In general, the fan collects air in the air by rotating the blades driven by a motor and supplies the wind in a direction desired by the user. The use of the fan for a long time in a closed space where air purification is not possible By recycling, it can cause user's discomfort.

Thus, although an air purifying filter is used in a fan, a filter installed in a conventional fan is not easy to install due to its complicated shape, and a filter having an excellent air purification function, for example, a HEPA filter is installed. There was a problem that the ventilation is hardly lost and the function of the fan to supply wind is lost.

In order to solve this problem, if the air filter is equipped with a poor air purification function, the wind comes out, but it only serves as a strainer to filter out only the visible particles, it can not actually perform the air purification function There was.

The present invention is to solve and solve the problems caused by the conventional air purification cover for a fan as described above,

It is an object of the present invention to provide an air purifying cover for a fan that has an excellent air purification function and allows the wind of the fan to normally go forward.

Another object of the present invention to provide an air cleaning cover for a fan that can easily and simply adjust the wind direction.

According to the present invention for achieving the above object, in the air purifying cover for the fan, disposed to cover the fan safety net wrapped away from the fan blade, the ventilation is possible, the ventilation portion formed with a first hole in the center side; A filter unit disposed adjacent to the ventilation unit to cover the fan safety net and made of a non-transmissive or semi-permeable material and having a second hole formed at a center thereof; And a first tightening part provided at an edge of the first hole. Including, but by adjusting the tightening degree of the first fastening unit to control the size of the first hole, the wind generated by the rotation of the fan blades by adjusting the position of the ventilation portion and the filter portion disposed on the fan safety net in the front and rear direction It provides an air purification cover for the fan, characterized in that to change the direction of the.

The first tightening unit may include a string receiving unit provided along an edge of the first hole; And a tension line accommodated in the line receiving portion and elastic; It may be configured to include.

The tension line may be fitted, and may be configured to further include a stopper for adjusting the tightening degree of the tension line.

When the first fastener is tightened, the filter unit may be configured such that one end thereof is positioned at an edge of the fan safety net, and the other end thereof has a width that can be positioned beyond a vertical line connecting the bottom and the end of the fan blade.

The filter unit may be configured to include any one or two of a HEPA filter or a Nano filter.

According to the air purifying cover for the fan according to the present invention, while having an excellent air purification function, there is an effect to allow the wind of the fan to normally go forward.

In addition, the present invention has an effect that can easily and simply adjust the wind direction.

1 is a view showing an air purification cover for a fan according to a first embodiment of the present invention.
2 is a view showing an air purification cover for a fan according to a second embodiment of the present invention.
3 is a view showing a state in which an air purification cover for a fan shown in FIG. 2 is installed in a fan.
4 is a view showing a state in which the air purification cover for the fan shown in Figure 2 is installed in the fan from the rear.
5 is an enlarged view of a first tightening part of an air purification cover for a fan according to a second embodiment of the present invention.
FIG. 6 is a view illustrating a moving direction of air by a fan provided with an air purification cover for a fan according to a second embodiment of the present invention.
FIG. 7 is a view showing a state in which a first tightening part of the air purifying cover for the fan according to the second embodiment of the present invention shown in FIG. 3 is tightened.
FIG. 8 is a view illustrating a state in which the air purification cover for the fan illustrated in FIG. 7 is installed in the fan from the rear.
FIG. 9 is a view illustrating a direction in which air is moved by a fan in which the air purification cover for the fan shown in FIG. 7 is installed.
10 is a view showing a state in which the direction of the wind is changed by adjusting the position of the air purification cover for the fan shown in Figure 9 on the fan safety net.
FIG. 11 is a view illustrating a state in which air is purified through the air purification cover for the fan illustrated in FIG. 10.

Hereinafter, with reference to the drawings will be described in detail. However, these drawings are for illustrative purposes only and the present invention is not limited thereto.

In general, the fan 200 is provided with a fan safety net 220 made of synthetic resin or metal to prevent safety accidents caused by the fan blades 210 that generate wind in accordance with a motor (not shown). The fan safety net 220 is disposed to wrap away from the fan blade 210 so that the fan blade 210 can be rotated smoothly, the present invention consists of a cover covering the fan safety net 220.

1 is a view showing an air purification cover for a fan according to a first embodiment of the present invention.

Referring to FIG. 1, the air purification cover 100 for a fan according to the first embodiment of the present invention includes a ventilation unit 10, a filter unit 20, and a first fastening unit 30.

Ventilation unit 10 is disposed to cover the fan safety net 220, the first hole 12 is formed in the center side is a portion capable of ventilation, for example, may be formed of a mesh structure or a string structure. .

The filter unit 20 is positioned adjacent to the ventilation unit 10 to cover the fan safety net 220 similarly to the ventilation unit 10, and is a non-transmissive or semi-permeable material, for example, HEPA filter or nano It is a part including any one or two of the filters (Nano filter). The filter unit 20 has a second hole 22 is formed at the center side so that the air at the rear side of the fan 200 gathers as the fan blades 210 rotate to generate wind toward the front. The filter unit 20 may be coupled to the front end of the rear end of the ventilation unit 10, or may be formed on the rear portion of the ventilation unit 10 to form the filter unit 20. In the latter case, the net or the string constituting the ventilation unit 10 is positioned throughout the ventilation unit 10 and the filter unit 20, in which case the remaining portion except for the portion where the filter unit 20 is located Abundance (10) is achieved.

The first tightening portion 30 is a portion provided at the edge of the first hole 12 formed at the center side of the ventilation portion 10 and includes a string receiving portion 32 and a tightening string 34. The string receiving portion 32 is a portion provided along the edge of the first hole 12, and the tightening string 34 is a kind of string accommodated in the string receiving portion 32, and a string generally used may be used. However, it is preferable to use a string made of an elastic material, for example, a rubber band.

Here, although the first tightening unit 30 has been described as including the cord receiving unit 32 and the tightening line 34, the first tightening unit 30 itself may be configured to consist of only the tightening line 34.

On the other hand, the second tightening portion 40 is formed at the edge of the second hole 22 formed on the center side of the filter portion 20 in the same manner as the first tightening portion 30 is provided at the edge of the first hole 12. It is provided. The second fastening portion 40 is also made to include a string receiving portion and a fastening line like the first fastening portion 30.

In this way, the user can easily adjust the degree of tightening, such as extending or tightening the first tightening unit 30 and the second tightening unit 40 by using a user's hand or a separate clip, and the like. The air purifying cover 100 for the fan according to the first embodiment may be installed in the fan 200, that is, the fan safety net 220.

2 is a view showing an air purification cover for a fan according to a second embodiment of the present invention, Figure 3 is a view showing a state in which the air purification cover for the fan shown in Figure 2 is installed in the fan, Figure 4 is The air purification cover for the fan shown in Figure is a view showing a state viewed from the rear installed in the fan. And, Figure 5 is a view showing an enlarged state of the first fastening portion of the fan air purification cover for a fan according to a second embodiment of the present invention, Figure 6 is a fan air purification cover for a fan according to a second embodiment of the present invention Is a diagram showing the direction of movement of air by the fan installed.

As shown in Figures 2 to 6, the fan air purification cover 100 according to the second embodiment of the present invention is configured similarly to the fan air purification cover 100 according to the first embodiment described above. However, the stopper 36 is further included in order to easily adjust the degree of tightening of the first tightening part 30.

The stopper 36 is positioned outside the line receiving portion 32 and a part of the tightening line 34 is fitted to adjust the length of the tightening line 34 to adjust the tightening degree of the first tightening unit 30. The stopper 36 includes two through holes 36a and buttons 36b formed to penetrate laterally, and a zip line 34 passes through the through holes 36a. At this time, the relative movement between the stopper 36 and the tension line 34 is not made when the button 36b is not pressed, and the tension line 34 moves inside the through hole 36a while the button 36b is pressed. It has a structure that can. This makes it possible to easily adjust the length of the tension line 34 located inside the string receiving portion (32). That is, the first tightening unit 30 may be simply reduced or increased according to the needs of the user.

1 and 2, the fan air purifying cover 100 according to the first and second embodiments of the present invention has a relatively small fan safety net 220 in a state where the first tightening unit 30 is extended. 4, the second hole 22 is positioned in a substantially circular shape near the center of the fan safety net 220, and the filter is disposed outside the second hole 22. The portion 20 is positioned in a substantially donut shape, and the ventilation portion 10 is positioned in an approximately donut shape having a larger diameter than the filter portion 20 on the outside of the filter portion 20. In addition, the first hole 12 in front of the ventilation unit 10 is located near the edge of the fan safety net 220, as shown in FIG.

In addition, when the fan 200 equipped with the air purifying cover 100 for the fan according to the first and second embodiments of the present invention operates, the air introduced into the second hole 22 and the ventilation unit 10 are provided. The air introduced into is moved toward the front of the fan 200 at a high speed as shown in FIG.

That is, when the fan 200 is operated in the state as shown in FIG. 6, the force of the air introduced through the ventilation unit 10 (arrow ①) and the force of the air introduced through the second hole 22 (arrow ②). This balance is discharged (arrow ③) through the first hole 12.

In particular, a force trying to flow to the side by riding the surface of the filter unit 20 according to the fluid dynamics acts on the air introduced through the second hole 22. This is because shear stress in Newton's law of viscosity acts. According to Newton's law of viscosity, which deals with the definition of fluid, it is possible to move one side in a different direction between a solid and a solid adjacent surface adjacent to each other. In the case of sliding in the opposite direction, a pull force is applied between the solid and the fluid on the surface. Therefore, when the solid moves, the surrounding fluid has a property to follow the moving direction of the solid, and when the fluid moves, the fluid flows along the surface of the solid. The pull force between the solid and the fluid is the shear stress, and this force is proportional to the surface area and the moving speed.

In other words, the force (arrow ①) to enter the ventilator 10 and the second hole 22 flows through the filter unit 20 to flow out through the filter unit 20 according to the operation of the fan 200 (arrow) ②) is in a balanced state and represents a dynamic relationship of discharge (arrow ③) through the first hole 12.

Therefore, the air flows into the filter unit 20 at a high flow rate through the second hole 22 and the ventilation unit 10, and the pressure is lowered due to the relatively high flow rate in front of the filter unit 20. (20) A pressure difference occurs between the front and the rear.

Therefore, the air behind the filter unit 20 is purified through the filter unit 20 and discharged through the first hole 12.

Hereinafter, with reference to the accompanying drawings, the air purification cover for a fan according to the present invention according to this configuration will be described in detail. At this time, the air purifying cover for the fan according to the first and second embodiments of the present invention is different only in the presence or absence of a stopper, so the state used is almost the same. An example will be described.

FIG. 7 is a view illustrating a state where the first tightening part of the fan air purification cover for the fan according to the second embodiment of the present invention shown in FIG. 3 is tightened, and FIG. FIG. 9 is a view illustrating a state in which the installed state is viewed from the rear, and FIG. 9 is a diagram illustrating a movement direction of air by a fan in which the air purification cover for the fan shown in FIG. 7 is installed.

First, as shown in FIG. 3, the degree of tightening of the first tightening unit 30 is adjusted in the state in which the fan air cleaning cover 100 according to the second embodiment of the present invention is covered with the fan safety net 220, that is, the stopper 36. When tightening the first tightening unit 30 by pulling the tightening line 34 through) the size of the first hole 12 is reduced while the ventilation unit 10 as shown in Figure 7 according to the operation of the fan 200 In the direction of the wind generated, that is, the front of the fan safety net 220 is moved. At this time, the filter unit 20 is also pulled toward the ventilation unit 10 is located at the edge of the fan safety net 220.

That is, the ventilation unit 10 covers a part of the side and the front of the fan safety net 220, and as shown in FIG. 8, at the rear of the fan 200, a second hole 22 and a second hole ( 22) Only the outer filter part 20 is visible.

Here, in the filter unit 20 shown in FIG. 8, one end positioned at the outside covers the edge of the fan safety net 220, and the other end positioned at the inside connects the bottom and the end of the fan blade 210 with each other. It is desirable to have a width of a size that can be located further forward beyond. To this end, the filter unit 20, when applied to the most commonly used 14-inch fan, preferably has a width of approximately 8cm to 9cm, 6cm to 7cm for 10-inch fan, 7cm to 8cm, 14 inch fan 8cm to 9cm, 16 inch fan has a width of 9cm to 10cm is good.

On the other hand, the movement direction of the air in the operation of the fan in the state of FIG. 7 and FIG. 8 is shown in FIG.

The present invention uses the property that air flows on the surface of an object, and the property of the air can be easily seen in elementary science experiments using candles and funnels as shown in [Figure 1] below. That is, the candle is placed away from the funnel, and no matter how hard the wind blows, the candle will not go out. This is because the air introduced into the funnel flows out along the inner surface of the funnel, and the arrow shown in [Figure 1] shows the main path of movement of air along the inner surface of the funnel.

[Figure 1]

That is, the present invention utilizes such a property of air so that a substantial amount of air introduced into the second hole 22 flows through the inner surface of the filter unit 20 and flows out to the ventilation unit 10.

In other words, since the rear edge of the fan safety net 220 is blocked by the filter unit 20, the air outside the fan 200 flows into the second hole 22. Rather than being discharged in a straight direction toward the front of the 200, flows through the inner surface of the filter unit 20 in accordance with the nature of the air and inclined obliquely forward through the ventilation unit 10 through the outside of the fan blade 210. Will be discharged. That is, as shown by the arrow shown in Figure 9 is to be injected more outward from the edge.

By tightening the first fastening unit 30 as described above, the positions of the ventilation unit 10 and the filter unit 20 can be moved to the front side on the fan safety net 220. Accordingly, the fan blade 210 is rotated. It is possible to change the direction of the wind discharged in a straight direction toward the front of the fan 200.

On the contrary, the ventilation unit 10 and the filter unit 20 may be moved to the rear side on the fan safety net 220.

FIG. 10 is a view showing a state in which the direction of the wind is changed as the air purifying cover for the fan shown in FIG. 9 is disposed on the fan safety net, that is, moved to the rear side on the fan safety net, and FIG. Figure is a view showing a state in which the air is purified through the air cleaning cover for the fan.

First, referring to FIG. 10, the air purification cover 100 for the fan is moved to the rear side on the fan safety net 220 compared to FIGS. 7 to 9.

This is to loosen the tightening degree of the first tightening unit 30 tightened in Figure 7 so that the air purification cover 100 for the fan can move to the rear side on the fan safety net 220, to almost the same position as in FIG. do.

That is, while the fan blade 210 is rotating in the state as shown in FIG. 7, the tightening degree of the first fastening unit 30 is released to allow the fan air purification cover 100 to move backward on the fan safety net 220. When the filter unit 20 is also moved to the rear side.

Accordingly, most of the wind that is discharged obliquely forward by riding the inner surface of the filter unit 20 is also changed laterally or rearward than in FIG. 9 as shown by arrows in FIG. 10.

As described above, the direction of the wind is changed when the tightening degree of the first tightening unit 30 is tightened or released as shown in FIG. 10 in the state in which the fan 200 is operated.

Looking at this in detail, as shown in Figures 7 to 9 tighten the tightening degree of the first tightening unit 30, as described in Figure 6, the force (arrow ①) for the air to enter the ventilator 10 is blocked, Only through the two holes 22 flows through the filter unit 20 and goes out to the side (arrow ②) is present.

As such, when the balance of power is broken, as shown in FIG. 10, when the tightening degree of the first tightening part 30 is released, the area of the ventilation part 10 gradually widens while the air tries to enter the ventilation part 10. (Arrow ①) is intended to act, but the force (arrow ②) that flows in through the second hole 22 and flows out through the filter unit 20 to the side acts more largely, rather than the wind through the ventilation unit 10. Will be discharged. In fact, after installing the fan air purifying cover 100 according to the present invention in the fan 200 and experimenting, through the force (arrow ①) and the second hole 22 to enter the air vent 10 The force (arrow ②) that flows through the filter unit 20 and flows out through the filter unit 20 continues to collide, and the vortex-like wind is discharged as if the pump is flushed.

This is because the shear stress in Newton's law of viscous as described above, and once the wind direction is changed, even if the fan blades 210 are manipulated to rotate more strongly, the shear stress acts more strongly, so that the wind fans 200 Rather than being discharged in a straight direction toward the front of the), it continues to be lateral.

This state is maintained when the fan 200 is operating, and when the fan 200 is stopped and then operated again by turning off the power of the fan 200, the wind again moves forward of the fan 200 as shown in FIG. 6. Will be discharged in a straight direction.

Accordingly, in FIG. 10, a considerable amount of air introduced into the second hole 22 is returned through the vent 10, and only a small amount of air flows outward.

In this case, as shown in FIG. 11, the front of the filter unit 20 has a low pressure due to a relatively fast flow rate and a high pressure at the rear thereof, so that air moves through the filter unit 20 due to the pressure difference between the two. In this process, it is purified by the filter unit 20.

In other words, according to Bernoulli's principle of hydrodynamics, velocity is inversely proportional to pressure and area. For example, narrowing the diameter of the water hose increases the speed of the discharged water and decreases the pressure.If the pump is used to inject a fluid into a small diameter pipe and move it toward a wide pipe, the opposite speed decreases and the pressure This is a principle that can lift up heavy things. Similarly, the lift applied to the plane wing is also flat on the bottom and streamlined on the top, so that the upper flow rate is faster than the flow rate below the wing, the pressure on the top of the wing is lower and the pressure on the bottom is higher, resulting in a heavier plane. Will be able to fly to the sky.

In other words, when the air behind the fan 200 flows into the narrow passage through the second hole 22 by the rotation of the fan blade 210, the flow velocity of the air is primarily increased.

Air introduced in this way flows on the inner surface of the filter unit 20 so that the direction of the wind is bent around the filter unit 20. At this time, the flow rate of the filter 20 inside the secondary is faster. According to Bernoulli's principle, the pressure of the inner surface of the filter portion 20 having a faster flow rate is lowered. At this time, air is purified while passing through the filter by the pressure difference between the front and rear ends of the filter portion 20, thereby filtering the filter portion 20. Ride flows out to the side (arrow ②) is discharged to the vent (10).

Therefore, in the summer, the wind of the fan 200 normally goes out in the case of the summer, and thus, the air purification effect can be obtained while using the function unique to the fan 200.

In addition, in winter, the air is not sprayed to the front of the fan 200, but spreads in all directions so that the air purification function can be used without being cold.

That is, by adjusting the tightening degree of the first tightening unit 30, it is a useful invention that can easily change the direction of the wind discharged through the fan 200.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the embodiments described above are to be considered in all respects as illustrative and not restrictive and the scope of the invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10: vent 12: first hole
20: filter 22: second hole
30: first fastening part 32: string receiving part
34: Tension line 36: Stopper
36a: through hole 36b: button
40: second tightening unit 100: fan air cleaning cover
200: fan 210: fan wing
220: fan safety net

Claims (5)

In the air cleaning cover for the fan,
A ventilation part disposed to cover the fan safety net wrapped away from the fan blade, and capable of ventilation, and having a first hole formed at a center thereof;
A filter unit coupled to the ventilation unit and positioned to cover the fan safety net and formed of a non-transmissive or semi-permeable material, and having a second hole formed at a center thereof; And
A first fastener provided at an edge of the first hole; Including,
As the size of the first hole is controlled by adjusting the tightening degree of the first fastening part, the ventilation part and the filter part are generated by the rotation of the fan blades by adjusting the position in which the fan part is disposed on the fan safety net in the front-rear direction. Air purification cover for the fan, characterized in that to change the direction of the wind.
The method of claim 1,
The first tightening unit,
A string receiving portion provided along an edge of the first hole; And
A tension string accommodated in the string receiving portion and having elasticity;
Air purification cover for a fan comprising a.
The method of claim 2,
The tension line is fitted, the air purification cover for a fan, characterized in that it further comprises a stopper for adjusting the tightening degree of the tension line.
The method according to any one of claims 1 to 3,
The filter unit includes:
When the first fastener is tightened,
One end is located at the edge of the fan safety net,
An air purification cover for a fan, characterized in that the other end has a width of the size that can be positioned beyond the vertical line connecting the bottom and the end of the fan blade.
The method of claim 4, wherein
The filter unit includes:
An air purification cover for a fan, comprising one or two of a HEPA filter or a Nano filter.

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