KR20200122989A - Electric fan with a function of air cleaning - Google Patents

Abstract

The present invention discloses an electric fan with an air purifying function, which has a cylindrical filtering filter mounted inside a back surface safety net to be detached so as to increase a contact surface with air introduced from the outside and maximize purifying efficiency, thereby being used as the electric fan in a state of detaching the filtering filter. Moreover, the electric fan with the air purifying function allows air purified through the filtering filter to blow when the filtering filter is mounted inside the back surface safety net, thereby being used as an air purifier.

Description

Electric fan with a function of air cleaning {ELECTRIC FAN WITH A FUNCTION OF AIR CLEANING}

The present invention is an electric fan comprising a wing rotated by a motor, a front safety net for protecting the wing from the front of the wing, and a rear safety net for protecting the wing from the rear of the wing and combined with the front safety net, A cylindrical filtration filter is detachably mounted inside the rear safety net to increase the contact area with air to maximize purification efficiency, and can be used as a fan when the filtration filter is removed, and inside the rear safety net. The present invention relates to a fan having an air cleaning function, characterized in that when a filtration filter is installed, air purified through the filtration filter is blown so that it can be used as an air purifier.

In general, a fan used in a home or office is a machine that generates wind by electricity and is a home appliance that is widely used in hot summer.

Such an electric fan provides cool wind to users in summer by rotating the rotor blades according to the driving of the motor and blowing air flowing from the rear to the front side, and there is a problem that the wind spreads widely and cannot be transmitted far.

In order to overcome the shortcomings of such a fan, the air conditioner is used, but it is cool, but it is an expensive product and has low energy efficiency, so there is a problem that the cost for using power is increased. By inducing more active air circulation, the air conditioner's cooling efficiency is improved and power consumption is reduced.

However, since the wind of the fan spreads widely, there is a problem that the air circulation ability is deteriorated because it cannot transmit the wind to a distance.In order to compensate for this problem, an air circulator having excellent straightness of the wind has been used instead of the fan recently. Since the air circulator must be purchased separately, there is a problem that the purchase cost is higher.

On the other hand, when the fan is operated indoors, dust and impurities existing in the room are scattered and flow into the respiratory tract. Recently, indoor air is not well ventilated due to the appearance of fine dust or ultrafine dust. Although the demand for air purifiers for the purification of air is rapidly increasing, there is a problem that the purchase cost of the air purifier, which is relatively expensive, is burdensome in that it must be purchased separately from the fan.

For reasons such as these problems, in a fan that generates wind similar to natural wind, it is inexpensive to have functions such as collecting dust and impurities that exist indoors without polluting the indoor air without an expensive air purifier. As a result, the development of an electric fan having various functions such as dust collection and direction for indoor air is actively progressing.

As an example of such a fan, a "fan having an air cleaning function" in Korean Utility Model Publication No. 20-0427342 is disclosed in FIG. 2.

In FIG. 2, reference numeral 12 is a fan, 13 is a protective net, 20 is a filtering means, 21 is a case, 22 is an annular groove, 23 is a mesh cloth, 24 is a nonwoven fabric, and 25 is a directional humidification filter, 26 is the border bar.

As shown in Fig. 2, the fan is a mesh cloth that filters large particles of yellow sand and dust, a nonwoven fabric that filters small particles of yellow sand and dust from the front of the mesh cloth, and a directional humidification disposed on the front of the nonwoven fabric A filter is provided on the front of the fan to clean and humidify the air.

However, since the above fan generates serious frictional resistance in the process of passing the air through the humidifying filter, the non-woven fabric and the mesh cloth during blowing, the amount of purified air actually discharged is remarkably small, and the blowing distance is also remarkably short. There was no problem.

The present invention was invented to solve the above problems, and if necessary, by selectively installing a filter filter and using it as a fan or air purifier, a fan having an air cleaning function capable of obtaining an indoor cooling or air cleaning effect It has its purpose to provide.

For the above purpose, the present invention is provided in an electric fan comprising a wing rotated by a motor, a front safety net for protecting the wing in front of the wing, and a rear safety net for protecting the wing at the rear of the wing. In order to maximize the purification efficiency by increasing the contact area with the air introduced from the outside, a cylindrical filter filter is detachably mounted inside the rear safety net, and can be used as a fan when the filter filter is removed. When the filter filter is installed inside the rear safety net, the purified air is blown through the filter filter so that it can be used as an air purifier.

In addition, in the present invention, the rear safety net has a cylindrical shape in which the front surface is open to allow insertion and removal of the filter filter, and side intake portions and rear intake portions are formed on the side and rear sides so that external air is smoothly sucked. It is characterized by that.

In addition, in the present invention, the side intake part is formed to be open to the rear with respect to the side edge of the wing so that air from the side is sucked in when the wing is rotated to increase the air intake amount to improve efficiency.

In addition, the present invention maximizes the air cleaning function by closing the rear intake part while the filter filter is inserted inside the rear safety net so that air is sucked only through the side intake part and only the air purified through the filter filter is blown. Open and closed state of the rear intake part can be selected so that a large amount of air flows in through the rear intake part by opening the intake part, so that enough air is blown for use as a fan, so that it can be used as a fan without the hassle of removing the filter. It characterized in that it is configured to.

In addition, the present invention provides the rear intake unit and the rear intake unit to maximize the airflow efficiency by completely closing the rear intake unit so that external air is sucked only through the side intake unit to maximize purification efficiency or to increase the air inflow amount by fully opening the rear intake unit. A blocking plate having a corresponding shape and having one edge hinged to the rear intake part is provided to be rotatable.

In addition, the present invention is to maximize the purification efficiency by completely closing the rear intake unit so that external air is sucked only through the side intake unit, or to maximize the airflow efficiency by increasing the amount of air inflow by completely opening the rear intake unit. The plurality of flaps are arranged vertically, and the plurality of flaps are connected in a parallelogram link structure so that the remaining flaps are interlocked with the rotation axis as the starting point according to the elevation of one flap.

In addition, in the present invention, the fan is characterized in that it is a fan capable of blowing in a vertical direction.

The present invention made as described above can be used as a fan or an air purifier by selectively mounting a filter filter inside the rear safety net. In particular, the present invention has the advantage of maximizing a filtering effect by remarkably increasing a contact area with air introduced from the outside through a cylindrical filtration filter arranged in a form surrounding the side edge of a wing.

In addition, the present invention has the advantage of excellent ventilation efficiency because a large amount of air is sucked from the side when the wing is rotated by forming a side intake part that is open to the rear based on the same line as the side border of the wing. There is an advantage of maintaining the wind speed as it is without directly contacting the side edge of the wing when inflow.

In addition, the present invention is configured to be able to select the open state and the closed state of the rear intake part through a plurality of flaps that are coupled with a blocking plate or a parallel oblique link structure, and the rear side in a state in which the filter filter is inserted into the rear safety net. When the intake part is closed, air is sucked only through the side intake part, and only the purified air through the filter filter is blown to maximize the air cleaning function. It can be used as a fan without the hassle of removing it.

In addition, the fan having the air cleaning function according to the present invention is capable of blowing in a vertical direction, so that the filtered air blown after purification moves to the upper layer, so that the contaminated air from the upper layer naturally moves to the lower layer and then purified through the filter filter. Air purification efficiency can be maximized by repetitive circulation. When heating indoors, the cold air of the lower layer is purged and then discharged, mixed with the hot air of the upper layer, and then moved to the lower layer to provide warm filtered air to create a pleasant indoor environment. Can be created and heating efficiency can be increased.

1 is an exemplary view showing a conventional general fan.
Figure 2 is an exemplary view of a fan having an air cleaning function according to the prior art.
3 to 4 are exemplary views of a fan having an air cleaning function according to the present invention.
5 is an exemplary view of a front safety net according to the present invention.
6 is an exemplary view of a rear safety net according to the present invention.
7A to 7B are schematic exemplified diagrams for comparing the inflow amount of air according to the open area of the side intake part according to an embodiment of the present invention.
8A to 8B are schematic exemplified diagrams for comparing the area of a filtration filter according to an open area of a side intake part according to an embodiment of the present invention.
9A to 9B are exemplary views showing an open state and a closed state of the rear intake unit according to an embodiment of the present invention.
10A to 10C are schematic diagrams for explaining the principle of opening or closing a rear intake unit according to another embodiment of the present invention.
11 is a schematic illustration for explaining a process in which air is filtered according to the blowing in the vertical direction.

Hereinafter, an electric fan having an air cleaning function according to the present invention will be described in more detail with reference to the accompanying drawings.

In the present invention, an electric fan refers to a wing (1) that is rotated by a motor, a front safety net (10) that protects the wing from the front of the wing, and a rear safety net that is combined with the front safety net and protects the wing from the rear of the wing ( 20) refers to a conventional electronic product.

Figure 3 is an exemplary view of a fan having an air cleaning function according to the present invention, Figure 4 is a separate perspective view of the present invention, the fan having an air cleaning function according to the present invention is a cylindrical filter inside the rear safety net (20) It is characterized in that the filter 30 is detachably mounted.

The filtration filter 30 is arranged in a shape surrounding the side edge 2 of the wing and has a cylindrical shape to maximize the purification efficiency by increasing a contact area with air introduced from the outside.

In addition, the filtration filter may have a predetermined cutout 31 at one side so that the support frame 3 vertically connected to the main body 4 on which the motor is mounted may be accommodated therein.

In the present invention, the material of the filtration filter 30 is not limited to the scope of the present invention, and in order to increase the filtering effect, for example, a HEFA filter made of charged fiber may be used.

HEFA FILTER is made of electrified fiber and has excellent dust collection efficiency by removing 99.97% of contaminated dust of 0.3㎛ or more, such as house dust, mites, viruses and mold, which are harmful to the human body with strong adsorption power.

In the present invention, when the filter filter 30 is removed, it can be used as a fan, and when the filter filter 30 is installed inside the rear safety net 20, the purified air is blown through the filter filter. Can be used as

For example, in summer when cooling is required, the filter filter 30 can be completely removed and used as a fan to provide cool breeze, and in spring, autumn, or winter when cooling is not required, the rear safety net ( 20) A filtration filter 30 is installed inside, and the purified air from which dust or impurities are removed through the filtration filter 30 is discharged forward, so that it can be used as an air purifier that purifies the indoor air.

Next, FIG. 5 is an exemplary view of a front safety net according to the present invention, and FIG. 6 is an exemplary view of a rear safety net according to the present invention, wherein the front safety net 10 may be formed in a ring shape in which the front and rear surfaces are open. , The rear safety net 20 may be formed in a cylindrical shape with an open front surface.

The front safety net 10 is formed in a ring shape having a predetermined width so as to prevent the scattering of wind formed when the blade rotates and to improve the efficiency of the fan by securing straightness.

In addition, the front safety net 10 may be formed in a form that gradually narrows from one side to the other side, for example, in a funnel form.

The reason why the front safety net 10 is formed in a form that gradually narrows from one side to the other is to use Bernoulli's theorem. According to this, when the same amount of wind (fluid) is introduced, While the pressure decreases, the wind speed (flow velocity) increases as the cross-sectional area of the guide decreases.

In addition, the front of the front safety net 10 protects the blades of the fan and prevents safety accidents for infants and young children, and the wind formed during the rotation of the blades is discharged while generating a vortex in the form of a spiral to reduce frictional resistance to reduce wind speed. A plurality of protective ribs 11 having a helical shape are provided so as to be improved.

The protective flesh 11 may be formed gradually thicker from the rear to the front, which makes the inner diameter of the passage through which the wind is discharged gradually narrow so that the wind does not scatter and exits in a straight line. This is to use Bernoulli's theorem, and a detailed description thereof will be omitted below.

Next, Figure 6 is an exemplary view of the rear safety net according to the present invention, the rear safety net 20 is made of a cylindrical shape having a predetermined width to accommodate the cylindrical filtration filter, the filter filter inside The front surface is open to facilitate insertion or removal.

In addition, the rear safety net 20 is provided with a side intake part 21 and a rear intake part 22 respectively on the side and rear sides so that external air is smoothly sucked into the inside.

The side intake part 21 and the rear intake part 22 may have a shape in which a plurality of grills 210 are continuously arranged at predetermined intervals to form a passage through which external air is sucked between the grill and the grill. Or, a plurality of air intake holes 220 may be formed in the form of a perforated plate.

Preferably, the side intake part 21 has a plurality of grills 210 closely arranged so as to smoothly inhale the outside air and prevent infants and young children from inserting fingers or thin and long tools. It is good. On the other hand, the shape of the side intake part and the rear intake part shown in FIG. 6 are only examples to aid understanding of the present invention, and are not limited to the scope of the present invention.

Next, in the present invention, the side intake part 21 may be formed in a form that is open to the rear relative to the side edge 2 of the wing.

7A is an exemplary view showing a state in which a side intake part 21 ′ in a form that is blocked by a predetermined width based on a side edge of a wing according to the prior art is formed, and FIG. 7B is a view showing a state in which the wing according to an embodiment of the present invention is formed. It is an exemplary view showing a state in which the side intake part 21 is opened by a predetermined width at the rear side based on the side border.

In general, a fan characterized by straightness is inevitably designed in the form of a band having a predetermined width so that the outer rim shape of the front safety net prevents the wind formed when the blade rotates from scattering and secures the straightness. The rim becomes a shape that covers the entire wing.

Also, when the blades of the same size rotate using the same power, it is the suction efficiency that determines the performance. The shape of the wing increases as it goes outward from the center of the wing, and most of the wind is formed on the outer wing. When the wing rotates, a large amount of wind with low mass is sucked from the side as well as from the rear. As shown in FIG. 1, it can be said that a fan having an open shape has the best intake efficiency.

Therefore, as shown in Fig. 7a, when the side edge 2 of the wing is blocked by a predetermined width by the side intake part 21 ′, external air is sucked only to the rear of the wing and wind cannot be sucked through the side, resulting in suction resistance. As a result, there is a problem that wind speed is lowered and efficiency is significantly lowered. In addition, when the rotational speed is increased in order to solve the problem of lowering the air volume or wind speed, there is a problem that serious noise is generated due to increased suction resistance.

On the other hand, when the side intake part 21 in the form open to the rear with respect to the side edge 2 of the wing is formed as shown in FIG. 7B, a large amount of air is sucked from the side of the wing to increase the amount of air blown while preventing noise. I can.

In addition, as shown in FIG. 8A, if the side edge 2 of the wing is blocked by a predetermined width by the side intake part 21 ′, the area of the filter filter 30 ′ becomes narrow in proportion to the blocked area, so that the purification efficiency decreases. I have no choice but to.

On the other hand, when the rear side is opened with respect to the side edge 2 of the wing by the side intake part 21 as shown in FIG. 8B, the area of the filtration filter 30 becomes relatively wide as compared to FIG. 8A. Since the contact area of is enlarged, the filtering effect can be maximized.

In the case of a conventional fan providing a general air cleaning function, when the purification efficiency as an air purifier is emphasized, the blowing efficiency as a fan is remarkably deteriorated, whereas when the efficiency as an electric fan is emphasized, the efficiency as an air purifier is inevitably decreased.

The present invention has a remarkable effect that is capable of maximizing both the blowing efficiency of the fan and the purification efficiency of the air purifier by forming the side intake part 21 of the form open at the rear based on the side border 2 of the wing, It is possible to solve the problem of a fan that provides an air cleaning function according to the prior art.

Next, the fan having an air cleaning function according to the present invention can select an open state and a closed state of the rear intake part 22.

9A and 9B are schematic diagrams illustrating a configuration in which an open state and a closed state of the rear intake unit 22 can be selectively performed according to an embodiment of the present invention.

First, in the fan having the air cleaning function, the support frame 4 is vertically provided from the support frame 3, and a motor part 5 coupled to the rear safety net 20 is provided on the upper part of the support frame 4 . In addition, a pair of rear intake portions 22 are formed on both sides based on the central portion of the rear safety net 20, and are in close contact with the rear intake portion 22 to block the passage through which air is introduced. 40 is provided. Here, the blocking plate 40 is formed in an arc shape corresponding to the rear intake part 22, and an end portion is hingedly coupled to the rear surface of the rear safety net to be rotatable. In addition, when the rear safety net has a width enough to cover the motor part 5, a predetermined cutout 23 in which the support frame 6 is accommodated may be formed in the lower center of the rear safety net.

The present invention makes it possible to control the suction amount and suction direction of the external air by making the rear intake part open or closed through the blocking plate 40, thereby increasing the discharge speed and distance of the purified air.

For example, when the filtration filter 30 is inserted into the rear safety net 20 and the rear intake part 22 is closed by the blocking plate 40 when the blade 1 rotates, external air is unconditionally lateral It functions as a perfect air purifier since it is purged through a filtration filter through the intake part 21 and then blown. However, the amount of air blown at this time is not sufficient to be used as a fan.

Here, when the rear intake part 22 is opened, outside air is sucked through not only the side intake part 21 but also through the rear intake part 22, so that the amount of air inflow is significantly increased, and the air is purified through the filtration filter. Although the air is blown, a larger amount of air is sucked through the rear intake unit 22 to secure the amount of air blown, so that it can be used as an electric fan without the hassle of removing the filter. Therefore, when the rear intake part 22 is opened and used as a fan for both air purifiers, an effect of gradually purifying indoor air can be obtained.

Conventional air purifiers have a structure in which air inhaled through a motor is purified while passing through a filtration filter and then discharged to the front. Since resistance by contact with the filtration filter inevitably occurs, it can only provide an air purifying function. It was not possible to use it as an electric fan that provides cool wind in the front, and if you want to discharge the wind at a sufficient speed and distance in the front, there is a troublesome problem in that you have to remove the filter filter inside.

Recently, a product that can be used as a fan and air purifier at the same time with a filter filter installed has been launched by improving the output of the motor. However, when using it as a fan, the speed of the motor and fan must increase in order to secure sufficient airflow. There is a problem in that the power consumption and noise increase proportionally due to the resistance caused by contact with the filter filter, the durability of the motor is inevitably reduced, and it is difficult to expect a sufficient air volume and wind speed to be used as a fan. there was.

Next, FIGS. 10A to 10C are schematic exemplified diagrams for explaining the principle of opening or closing the rear intake unit according to another embodiment of the present invention, and FIG. 10A shows the closed state of the rear intake unit 22. In addition, FIG. 10B shows the rear intake part 22 in an open state. In addition, FIG. 10C shows different colors of the flap, the fixed shaft, and the link so that the coupling relationship and the operating principle of the components according to the present invention can be more easily understood.

First, in the present invention, the rear intake part 22 is formed in a substantially semicircular shape on both sides with respect to the central part of the rear safety net 20, and a plurality of flaps 50 are provided inside each rear intake part 22. It can be arranged in top and bottom multi-stage.

Here, the plurality of flaps 50 may have different lengths according to positions disposed to form a shape corresponding to the rear intake part 22.

In addition, as shown in Fig. 10c, the plurality of flaps 50 is connected to each of the fixed shafts 51 so that the fixing shaft 51 is coupled to the rear central portion of each flap 50, and the remaining flaps are interlocked when one flap is rotated. The link 52 is coupled to form orthogonal to the fixed shaft 51 to form a parallelogram link structure.

In this way, when the plurality of flaps 50 are combined in a parallelogram link structure, when one flap is rotated, the remaining flaps are interlocked, so that the rear intake part 22 can be easily changed into an open state or a closed state. It can be allowed to flow into the rear safety net or block outside air. In addition, when the plurality of flaps 50 block the rear intake part 22, since infants and young children cannot insert fingers or thin and long tools, there is an effect of preventing safety accidents in advance.

Meanwhile, the parallelogram link structure is a known technology (structure) applied to regulate the flow of air in the engine room or air outlet of a vehicle, and a detailed description thereof will be omitted.

As described above, in the present invention, the rear intake part 22 is completely closed while the filter filter 30 is installed inside the rear safety net 20 so that outside air is sucked only through the side intake part 21, the filter filter Purification efficiency can be maximized by allowing only the purified air to be blown through, or a large amount of air is introduced through the rear intake unit 22 by opening the rear intake unit 22 to provide sufficient ventilation to remove the filter. It can be used as a fan that provides air cleaning function without hassle.

Next, in the present invention, the fan may be an air clean electric fan capable of blowing in a vertical direction.

FIG. 11 is an exemplary view schematically showing a process of purifying indoor air through a fan in which a filtration filter 30 is mounted inside the rear safety net 20 and blown in a vertical direction, the fan blown upward in the vertical direction Since air can be sucked in 360° from all directions through the side intake part 21 and the rear intake part 22, the advantage that the fan in the air cleaning mode can be freely arranged regardless of the location of the indoor corner or center. There is this.

In addition, since the filtered air blown after purification moves to the upper layer, contaminated air from the upper layer is naturally moved to the lower layer, and circulation to pass through the filter filter can be continuously induced, so that air purification efficiency is remarkably excellent.

In addition, when heating indoors, cold air stays in the lower layer due to convection and hot air stays in the upper layer. When the fan in FIG. 11 is operated in the heated room, the cold air in the lower layer is purified and then discharged to the upper layer. It moves to the lower layer while being mixed with the hot air of the air and provides warm filtered air to the lower layer, thus creating a pleasant indoor environment and increasing heating efficiency.

As described above, the present invention is not limited to the above-described embodiments, and modifications by those skilled in the art are possible within the scope not impairing the spirit of the present invention. Therefore, the scope of claiming the rights in the present invention is not defined within the scope of the detailed description, but will be limited by the claims and the technical spirit thereof to be described later.

1: wing 2: side border
3: support 4: support frame
5: motor part
10: front safety net 11: protection flesh
20: rear safety net
21: side intake part 210: grill
22: rear intake 220: air intake hole
23: incision
30: filtration filter 31: cutout
40: blocking plate
50: flap 51: fixed shaft
52: link

Claims (7)

In an electric fan including a wing (1) rotated by a motor, a front safety net (10) for protecting the wing from the front of the wing, and a rear safety net (20) that is combined with the front safety net and protects the wing from the rear of the wing In,
A cylindrical filtration filter 30 is detachably mounted inside the rear safety net 20 so as to maximize the purification efficiency by increasing the contact area with the air introduced from the outside,
In the state where the filter filter 30 is removed, it can be used as a fan,
A fan having an air cleaning function, characterized in that when the filtration filter (30) is installed inside the rear safety net (20), the air purified through the filtration filter is blown so that it can be used as an air purifier.
The method of claim 1, wherein the rear safety net has a cylindrical shape in which the front surface is open to allow insertion and removal of the filter filter, and side intake portions and rear intake portions are formed on the side and rear sides so that external air is smoothly inhaled. An electric fan having an air cleaning function, characterized in that.
The air according to claim 2, wherein the side intake part is formed in a form open to the rear with respect to the side edge of the wing so that the air in the side is sucked in when the wing is rotated to increase the air intake amount to improve efficiency. An electric fan with a clean function.
The method according to claim 2, wherein the rear intake part is closed while the filter filter is inserted in the rear safety net so that air is sucked only through the side intake part and only the purified air through the filter filter is blown to maximize the air cleaning function, or Open and closed states of the rear intake part are selected so that the rear intake part is opened so that a large amount of air flows in through the rear intake part to allow sufficient blown air for use as a fan so that it can be used as a fan without the hassle of removing the filter. An electric fan having an air cleaning function, characterized in that it is configured to be possible.
The rear intake unit and the rear intake unit according to claim 4, wherein the rear intake unit is completely closed so that external air is sucked only through the side intake unit, thereby maximizing purification efficiency, or opening the rear intake unit to increase the air inflow amount to maximize blowing efficiency. An electric fan having an air cleaning function, characterized in that a blocking plate having a corresponding shape and having one edge hingedly coupled to the rear intake part is provided to be rotatable.
The rear intake part according to claim 4, wherein the rear intake part is completely closed so that external air is sucked only through the side intake part to maximize purification efficiency, or the rear intake part is fully opened to increase the amount of air inflow to maximize blowing efficiency. An electric fan having an air cleaning function, characterized in that the plurality of flaps are arranged up and down in the interior, and the plurality of flaps are connected in a parallelogram link structure so that the remaining flaps are interlocked with the rotation axis as a starting point according to the elevation of one flap.
The fan according to any one of claims 1 to 6, wherein the fan is a fan capable of blowing in a vertical direction.

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