KR102170048B1 - Net for of an electric fan - Google Patents

Abstract

The present invention relates to a safety net for an electric fan, comprising a front net for protecting a blade in front of the blade rotated by a motor, and a rear net for protecting the blade at the rear of the blade and detachably coupled to the front net, wherein the rear net is formed in a cylindrical shape having a predetermined width and the front open, and a filtration filter having a cylindrical shape is removably installed inside the rear net in the form of surrounding the side edge of the blade to maximize the purification efficiency by increasing the contact area with the air introduced from the outside. When the filtration filter is removed, the electric fan can be used as the electric fan, and when the filtration filter is installed, the electric fan can be used as an air purifier by blowing air purified through the filtration filter.

Description

Electric fan safety net{NET FOR OF AN ELECTRIC FAN}

The present invention is a safety net of a fan comprising a front net for protecting the wings in front of a wing rotated by a motor, and a rear net for protecting the wings at the rear of the wing and detachably coupled with the front net, the rear net A filtration filter having a cylindrical shape to maximize the efficiency of purification by increasing the contact area with the air flowing in from the outside is formed in a cylindrical shape with a predetermined width. It is mounted to be detachable in the form of wrapping, and when the filter filter is removed, it can be used as a fan, and when the filter filter is installed, the purified air is blown through the filter to be used as an air purifier. It relates to the safety net of the electric fan.

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 a conventional fan is provided with a safety net consisting of a wing rotated by a motor, a front net and a rear net respectively provided at the front and rear of the wing, and blows air introduced from the rear to the front side through the rotational force of the wing. It provided cool breeze to users in summer.

On the other hand, when the fan is operated indoors, dust and impurities that exist in the room are scattered and flowed into the respiratory tract. Recently, indoor air is not properly ventilated due to the appearance of fine dust or ultrafine dust. The demand for air purifiers for purification is increasing rapidly.

However, since such an air purifier must be purchased separately from an electric fan, there is a problem that the purchase cost of a relatively expensive air purifier is burdensome.

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.

Therefore, in order to use it as a fan, there is an inconvenient problem since the humidification filter, the nonwoven fabric, and the mesh cloth must be removed, and there is a cumbersome problem in that attention must be paid to storage in order to prevent loss of the removed humidification filter, nonwoven fabric and mesh cloth.

The present invention has been invented to solve the above problems, and provides a safety net for a fan capable of obtaining an indoor cooling or air cleaning effect by selectively installing a filter filter and using it as a fan or air purifier if necessary. There is a purpose.

For the above purposes, the present invention provides a safety net for a fan comprising a front net for protecting the wings in front of the wings rotated by a motor and a rear net for protecting the wings at the rear of the wings by detachably coupled to the front net. In this case, the rear net is formed in a cylindrical shape having an open front surface and a predetermined width, and a filtration filter having a cylindrical shape to maximize purification efficiency by increasing a contact area with air introduced from the outside inside. The filtration filter can be used as a fan when removing the filtration filter, and when the filtration filter is installed, the purified air is blown through the filtration filter to be used as an air purifier. The rear net is composed of a side intake unit and a rear intake unit so that external air is smoothly inhaled, and the rear intake unit is completely closed while the filter filter is mounted inside the rear net. Is to maximize purification efficiency by being sucked only through the side intake and blowing only the purified air through the filtration filter, or by allowing the rear intake to be fully opened to inhale more air through the rear intake to provide an air cleaning function In order to be used as a fan, the rear intake part is characterized in that it is configured to be able to select an open state and a closed state.

delete

In addition, the present invention is made in a shape corresponding to the rear intake part so as to select an open state or a closed state of the rear intake part, and an air volume control plate having one edge hingedly coupled to the rear intake part is provided to be rotatable, or A plurality of flaps are arranged vertically on the rear intake part, and the plurality of flaps are connected in a parallelogram link structure so that the remaining flaps are interlocked with a rotation axis as a starting point according to the elevation of one flap.

In addition, a disk-shaped adapter plate in close contact with a rear net coupling portion formed on the front surface of the motor case into which the motor is inserted is provided at the central portion of the rear net according to the present invention, and the rear net coupling portion A through hole having a predetermined diameter through which the cylindrical fixing nut fixed shaft is protruded from the front to surround the rotation axis of the motor is formed, and from the front surface of the rear net coupling part along the radius of curvature of the adapter plate based on the through hole. A multi-hole is formed through which the fixing protrusions protruding forward are formed, and the multi-hole is so that the fixing protrusion passes through regardless of the number, position, or arrangement of the fixing protrusions so that the rear net can be in close contact with the rear net coupling part. It is characterized in that it is formed in a long hole shape, or in a form in which a plurality of fixing holes having a shape corresponding to the fixing protrusion are arranged at regular intervals along the radial direction.

In addition, in the present invention, when the diameter of the fixing nut fixing shaft is larger than the diameter of the through hole, the adapter plate is detachable from the rear net so that the adapter plate can be removed from the rear net and then inserted into the rear net coupling part and fixed. It is characterized by being combined.

In addition, in the present invention, a rectangular case in which the inside is empty and one side is open is formed at the lower center of the rear net, and the outer circumferential surface of the support frame provided so as to be retractable from the case and whose end is vertically coupled to the bottom surface of the case. It characterized in that it is provided with a support member that is in close contact with, and a sagging prevention member including an elastic spring elastically supporting the support in the case so that the support is firmly in close contact with the support frame.

The present invention made as described above can be used as an electric fan or air purifier by having a rear net formed of a cylindrical shape having an open front surface and a predetermined width, and selectively installing a filtration filter therein.

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, in the present invention, the rear intake may be completely closed or completely open. When the rear intake is completely closed, external air is introduced only through the side intake, so that purification efficiency can be maximized. Since the inflow amount can be remarkably increased, the blowing efficiency can be maximized.

In addition, the present invention can be used by removing the existing rear net and then attaching the rear net to the rear net joint through an adapter plate according to an embodiment of the present invention and then fastening with a fixing nut. Even if the number, location, or arrangement of the fixing protrusions protruding on the front side of the part is different depending on the product or brand, it can be easily fixed and coupled through the multi-hole formed in the adapter plate, so construction is easy and the compatibility is excellent.

In addition, in the present invention, the adapter plate is configured to be detachably detachable from the rear net, so that when the diameter of the fixing nut fixing shaft of the existing fan is larger than the diameter of the through hole formed in the center of the adapter plate, the adapter plate is rearranged. After removing from the net, the rear net can be directly inserted into the rear net joint and fixed, so there is an advantage of easy construction and excellent compatibility.

In addition, the present invention can prevent the sagging phenomenon of the safety net even if the weight of the safety net increases by installing a filtration filter inside the rear net through a sagging prevention member provided in the lower center of the rear net, and a component supporting the safety net (e.g. For example, the durability of torsion springs) can be improved.

1 is an exemplary view of a conventional general fan.
2 is an exemplary view of a fan providing an air cleaning function according to the prior art.
3 and 4 are exemplary views of the safety net of the fan according to the present invention.
5 is a schematic exemplified view for explaining a side intake part and a rear intake part according to an embodiment of the present invention.
6A to 6H are exemplary views showing an open state and a closed state of a rear intake unit according to an embodiment of the present invention.
7A and 7B are photographs of a rear network of a conventionally disclosed fan.
Figures 8a and 8b are photographs for explaining the rear network coupling part of the conventionally disclosed fan.
9 and 10 are schematic exemplary views for explaining an adapter plate according to an embodiment of the present invention.
11A to 11C are photographs taken in a state in which the rear network of the conventionally disclosed fan is coupled to the rear network coupling unit.
12A and 12B are schematic exemplified views for explaining a sagging prevention member according to an embodiment of the present invention.

Hereinafter, the safety net of the fan according to the present invention will be described in more detail with reference to the accompanying drawings.

First, the safety net of a fan in the present invention refers to a safety net consisting of a front net that protects the wings in front of a wing rotated by a motor, and a rear net that is detachably coupled to the front safety net and protects the wings at the rear of the wing. Refers to.

Figure 3 is a schematic illustration for explaining the safety net of the fan according to the present invention, Figure 4 is an exploded perspective view of the safety net of the electric fan according to the present invention, the present invention is a fan by selectively mounting a filter filter inside the rear net Or it is configured to be used as an air purifier.

For the above purposes, the rear net 100 according to the present invention has a cylindrical shape having a predetermined width, and has an open front surface to facilitate insertion or removal of the filter filter therein.

A filtration filter 200 for providing a filtering effect of air is mounted inside the rear net 100.

The filtration filter 200 is arranged in a form surrounding the side edge 21 of the wing inside the rear net 100, and has a cylindrical shape to maximize the purification efficiency by increasing the contact area with the air introduced from the outside. Consists of

In the present invention, the material of the filtration filter 200 is not limited to the scope of the present invention, and in order to increase the filtering effect, for example, a HEPA filter made of charged fiber may be used. HEPA 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.

The conventionally disclosed fan cannot have a filtration filter installed therein due to the characteristics of the rear net, but the safety net of the electric fan according to the present invention has a cylindrical rear net 100 having an open front and a predetermined width. It can be used as a fan or air purifier by selectively installing the filter filter 200 inside. For example, in summer when cooling is required, the filter filter 200 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 net 100 ) It can be used as an air purifier to purify indoor air by installing the filter filter 200 inside, removing dust or impurities through the filter and discharging the purified air to the front.

The front net is a conventional one provided to be detachably coupled to the rear net so that the filter filter can be selectively installed or removed inside the rear net, and a detailed description thereof will be omitted below. In addition, the shape of the front network illustrated to aid understanding of the present invention is only an example to aid understanding of the present invention and is not limited to the scope of the present invention.

Next, the side and rear sides of the rear net 100 include side intake units 110 and rear intake units 120, respectively, so that external air is smoothly sucked into the interior.

The side intake unit 110 and the rear intake unit 120 may be formed in a form in which a plurality of grills are continuously arranged at predetermined intervals so that a passage through which external air is sucked is formed between the grill and the grill. It may be a perforated plate in which four air intake holes are perforated.

For example, the side intake unit 110 and the rear intake unit 120 can smoothly inhale outside air and prevent infants and young children from inserting fingers or thin and long tools. It is preferable that a plurality of grills 111 and 121 are closely arranged as shown in FIG. 5.

Next, the rear intake unit 120 according to the present invention is configured to select an open state and a closed state.

6A and 6B are schematic diagrams illustrating a configuration in which an open state and a closed state of the rear intake unit 120 can be selectively performed according to an embodiment of the present invention.

6A and 6B are exemplary views showing an electric fan equipped with a safety net according to an embodiment of the present invention, in which the support frame 50 is vertically provided from a pedestal 60 mounted on the ground, and the support A motor case 30 into which a motor is interpolated is provided on the upper part of the frame, and the motor case is coupled to the rear net 100 according to the present invention through a rear net coupling part 31 at the front.

In addition, the rear intake unit 120 is equipped with a pair of hinged panels 140 at the upper and lower portions based on the motor case 30, and the rear intake units at both sides of the hinged panel 140 ( A pair of air volume control plates 130 that block the open portion of 120) are provided.

The air volume control plate 130 is hinge-coupled at one edge so as to be rotatable from the hinge coupling panel 140, and has an arc shape so as to easily block the open portion of the rear intake part.

The air volume control plate 130 is in close contact with the rear intake unit and blocks the passage through which air is introduced, or is spaced apart from the rear intake unit to open the air passage to select an open state or a closed state of the rear intake unit 120. The inflow amount of air can be adjusted, and the discharge speed and distance of the purified air can be increased.

For example, when the filter filter 200 is inserted into the rear net 100 and the rear intake unit 120 is closed by the air volume control plate 130, the outside air is unconditionally sideways when the blade 20 rotates. Since it is introduced into the safety net through the intake unit 110 and then purified through the filtration filter 200 and then blown, it serves as a perfect air purifier. However, the amount of air blown at this time is not sufficient to be used as a fan.

On the contrary, when the air volume control plate 130 is rotated to open the rear intake unit 120, the outside air is purified through the filtration filter through the side intake unit 110 and blown through the rear intake unit 120. Since a larger amount of air is sucked in, enough air is blown even as an electric fan. Therefore, when the rear intake unit 120 is opened and used as an air purifier combined fan, the indoor air can be gradually purified.

In addition, FIGS. 6C to 6H are schematic illustrations for explaining the principle of opening or closing the rear intake unit according to another embodiment of the present invention, and FIGS. 6C and 6D illustrate a state in which the rear intake unit 120 is closed. 6e and 6f illustrate a state in which the rear intake part 120 is open. In addition, in FIGS. 6A to 6H, the rear intake part 120 is illustrated in a form in which a plurality of grills are arranged vertically at predetermined intervals so that a plurality of air passages are formed between the grill and the grill.

A plurality of flaps 140 are arranged vertically in the rear intake part 120 according to the present invention.

Each flap 140 is coupled to the grill in a substantially vertical direction, and has a width and length corresponding to each opening portion so as to smoothly block each opening portion between the grill and the grill.

In addition, a fixed shaft 141 is coupled to the rear central portion of each flap 140, and a link 142 connecting each of the fixed shafts 141 so that the remaining flaps are interlocked when one flap is rotated is provided with the fixed shaft 141 They are orthogonal and are combined.

As the plurality of flaps are combined in a parallelogram link structure as described above, the remaining flaps are interlocked when one flap is rotated to open or close the rear intake unit 120 to allow external air to flow into the rear net or to block external air. .

On the other hand, the configuration consisting of a parallelogram link structure is a structure applied to regulate the flow of air in an engine room or a ventilation port of a vehicle, and a detailed description thereof will be omitted.

6A to 6F, in the present invention, the rear intake unit 120 is completely closed in a state in which the filter filter 200 is mounted inside the rear net 100 so that outside air is only passed through the side intake unit 110. Purification efficiency can be maximized by allowing only the purified air to be blown through the filtration filter by being inhaled, or the rear intake unit 120 is completely opened so that a larger amount of air is sucked through the rear intake unit 120 Therefore, it can be used as a fan that provides air cleaning function.

Next, Figs. 7a and 7b are photographs of the rear net of the conventionally disclosed fan, and Figs. 8a and 8b are photographs respectively of the rear net couplings meshing with the rear nets of Figs. 7 and 7b, respectively. The rear net 80 is provided with a fixed disk 81 formed of a metal or synthetic resin material at the center. The fixed disk 81 is a conventional plate-shaped member that is in close contact with the rear net coupling portion 31 provided on the front of the motor case 30 into which the motor is inserted, and a detailed description thereof will be omitted.

A fixed shaft through hole of a predetermined diameter through which a cylindrical fixed nut fixed shaft 32 protruding from the front of the rear net coupling part 31 in a form surrounding the rotation shaft of the motor is passed through the central portion of the fixed disk 80 ( 82) is formed, and at a position spaced apart from the fixed shaft through hole by a predetermined distance along the radial direction, when the rear net 80 is engaged with the rear net coupling part 31 via the fixed disk 81, or A fixing protrusion through hole 83 through which the fixing protrusion 33 for preventing separation is formed is formed.

However, as can be seen through FIGS. 7A and 7B, for example, the rear network 80 of FIG. 7A is shown in the conventional fan because the number, location, or arrangement of the fixing protrusions 32 is different depending on the product or brand. When in close contact with the rear net coupling portion 31 ′ of 8b, the positions between the fixing protrusion 33 ′ and the fixing protrusion through hole 83 do not match, and thus mutual coupling is impossible.

In other words, if the conventional fan lacks compatibility and the rear net in possession is damaged due to factors such as external shock, the same rear net must be purchased to continuously use the fan. If the same rear net cannot be obtained, the fan itself There was a problem in having to purchase a new one.

9 and 10 are schematic illustrations for explaining the adapter plate 300 according to an embodiment of the present invention, and the rear net 100 according to the present invention replaces the rear net 80 of an existing fan. can do.

For the above purposes, a disk-shaped adapter plate 300 in close contact with the rear net coupling portion is provided at the central portion of the rear net 100 according to the present invention, and the fixing nut fixing shaft penetrates the central portion of the adapter plate. A fixed shaft through hole 310 having a predetermined diameter is formed, and a multi-hole 320 through which the fixing protrusion 33 passes along a radius of curvature of the adapter plate is formed based on the fixed shaft through hole.

The multi-hole 320 is for allowing the rear net 100 to be in close contact with the rear net coupling part 31, regardless of the number, position, or arrangement state of the fixing protrusions 33. It may be formed in a long hole shape, or may be formed in a form in which a plurality of fixing holes having a shape corresponding to the fixing protrusion are arranged at regular intervals along the radial direction. In FIGS. 9 and 10 for aiding understanding of the present invention, a pair of long holes formed in an approximately arc shape based on the fixed shaft through hole 310 are shown to be arranged at regular intervals.

The rear net 100 according to the present invention is a rear surface in which different numbers of fixing protrusions are formed in the upper and lower portions based on the rotation axis of the motor as shown in FIG. 8A through the adapter plate 300 on which the multi-holes 320 are formed. The mesh coupling portion or the rear mesh coupling portion in which one fixing protrusion is formed at the lower portion of the upper portion based on the rotation axis of the motor as shown in FIG. 8B or any previously disclosed fan may be mounted and then fastened with a retaining fixing nut.

Next, FIG. 11A is a state in which the rear net 80 is fixed with a fixing nut 40 to the rear net coupling part of the motor case equipped with an AC motor, and FIG. 11B is a rear net combination of a motor case equipped with a BLDC motor. The rear net (80 ′) is fixed with a fixing nut (40′) on the part, and FIG. 11C is a rear net coupling part of the motor case 30 ′ equipped with a BLDC motor with the rear net removed from FIG. 11B. This is a picture of a state in which the fixing nut 40' is fixed.

As illustrated in FIGS. 11A to 11C, the fixed nut fixed shaft has a different diameter depending on the brand or model (product) of the fan. In particular, in the case of a fan using a BLDC motor as shown in Figs. 11B and 11C, the diameter of the fixed nut fixed shaft is Since it is significantly larger than the diameter of the fixed shaft through-hole formed in the center of the adapter plate, it is impossible to connect the rear net to the rear net coupling part.

In this way, the adapter plate 300 according to the present invention may be detachably coupled from the rear net 100 so that the rear net can be fastened to the rear net coupling part even when the diameter of the fixed nut fixing shaft is larger than the diameter of the fixed shaft through hole. I can.

For example, when the fixing nut fixing shaft is formed with a diameter corresponding to the through hole of the fixing shaft formed in the center of the adapter plate, as shown in FIG. 11A, the adapter plate 300 is coupled to the rear net while being fastened to the rear net 100. After being fitted into the part, it is fixed by tightening with a fixing nut, and when the diameter of the fixing nut fixing shaft is significantly wider than the diameter of the through hole of the fixing shaft as shown in FIG. The shaft is fitted so as to pass through the central portion of the rear net 100 where the adapter plate 300 was located, and then fastened with a fixing nut 40 ′ to be fixed.

As described above, the present invention has an advantage of remarkably excellent workability and compatibility since the rear net can be fastened to the rear net coupling unit without being affected by the diameter of the fixed nut fixing shaft of the existing fan.

On the other hand, the safety net according to the present invention can be used as an air purifier by installing a filter filter inside the rear net. When the filter filter is installed inside the rear net, the weight of the safety net increases, which may cause sagging due to load.

The present invention includes a sagging prevention member 400 for preventing such sagging.

12A and 12B are schematic illustrations for explaining a sagging prevention member according to an embodiment of the present invention, wherein the sagging prevention member 400 includes a case 410 and a support provided to be withdrawn from the case ( 420) and an elastic spring 430 elastically supporting the support.

The case 410 is formed along the width direction of the rear net at the lower center of the rear net 100, has a rectangular shape with an empty inside, and a stopper for controlling the movement of the support to be described later on one side A locking groove 411 is formed to restrain it.

The support 420 is provided to be withdrawn from the inside of the case as needed, and a stopper 421 is formed at one side to restrict movement while being caught in the locking groove, and at an end thereof, close contact with the outer circumferential surface of the support A close contact plate 422 is provided.

In general, the support provided in the fan is made of a circular bar shape having a predetermined length, and the contact plate 422 may have a surface facing the support inwardly concave so that it can be firmly adhered to the outer peripheral surface of the support. .

In addition, the support 420 may be formed in a telescopic shape that overlaps and expands to secure the withdrawal length.

The elastic spring 430 is provided inside the case, but is inserted so that one end is in close contact with the inner wall of the case and the other end is in close contact with the end of the support to elastically support the support. When the support is drawn out, the support By pressing the end of the contact plate provides an elastic force so that it is firmly adhered to the outer peripheral surface of the support.

The sagging prevention member 400 as described above stably supports the safety net while the contact plate 422 provided at the end of the support 420 is firmly adhered to the support frame by the elastic support force of the elastic spring 430. A filtration filter is installed inside the net, so even if the weight of the safety net increases, it can prevent sagging of the safety net, and provides a remarkable effect of securing the durability of parts (eg, torsion springs) that support the safety net.

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.

10: rotation axis of the motor
20: wing 21: side border
30: motor case 31: rear net coupling part
32: fixing nut fixing shaft 33: fixing protrusion
40: fixing nut
50: support frame 60: pedestal
70: front net
80: rear net 81: fixed disk
82: fixed shaft through hole 83: fixed projection through hole
100: rear net
110: side intake 111: grill
120: rear intake part 121: grill
130: air volume control plate 131: hinge coupling panel
140: flap 141: fixed shaft
142: link
200: filtration filter
300: adapter plate 310: fixing nut through hole
320: multi-hole
400: sagging prevention member
410: case 411: locking groove
420: support 421: contact plate
422: stopper
430: elastic spring

Claims (6)

In the safety net of a fan consisting of a front net protecting the wings in front of the wings rotated by a motor and a rear net detachably coupled with the front net and protecting the wings at the rear of the wings,
The rear net 100 is formed in a cylindrical shape with an open front surface and a predetermined width, and has a cylindrical shape so as to maximize the purification efficiency by increasing the contact area with air introduced from the outside inside. The filter 200 is detachably mounted in a form surrounding the side edge 21 of the wing,
When the filtration filter is removed, it can be used as a fan,
When the filtration filter is installed, the air purified through the filtration filter is blown so that it can be used as an air purifier,
The rear network is composed of a side intake unit and a rear intake unit so that external air is smoothly inhaled,
With the filter filter installed inside the rear net, the rear intake part is completely closed so that outside air is sucked only through the side intake part and only the air purified through the filter filter is blown to maximize purification efficiency, or the rear intake part is completely closed. A safety net for an electric fan, characterized in that the rear intake part is configured to select an open state and a closed state so that a larger amount of air is sucked through the rear intake part to be used as a fan providing an air cleaning function.
delete The method of claim 1, wherein the rear intake part is opened or closed.
An air volume control plate having a shape corresponding to the rear intake part and having one edge hinged to the rear intake part is provided to be rotatable,
A safety net of an electric fan, characterized in that a plurality of flaps are arranged up and down in the rear intake part, and the plurality of flaps are connected in a parallelogram link structure so that the remaining flaps are interlocked with a rotation axis as a starting point according to the elevation of one flap.
The method of claim 1,
A disk-shaped adapter plate in close contact with a rear mesh coupling portion formed on the front surface of the motor case into which the motor is inserted is provided at the central portion of the rear network,
A through hole having a predetermined diameter through which a cylindrical fixing nut fixing shaft protruding from the front of the rear net coupling part in a shape surrounding the rotation axis of the motor is formed in the central part of the adapter plate, and A multi-hole through which a fixing protrusion protruding forward from the front of the rear net coupling portion is formed along a radius of curvature,
The multi-hole is formed in a long hole shape so that the rear net can be in close contact with the rear net coupling unit while the fixing protrusions penetrate regardless of the number, position, or arrangement state of the fixing protrusions, or a fixing hole having a shape corresponding to the fixing protrusion is radial Safety net of an electric fan, characterized in that made in a form arranged in a plurality of spaced along a predetermined interval.
The method of claim 4, wherein when the diameter of the fixing nut is larger than the diameter of the through hole, the adapter plate is detachable from the rear net so that the adapter plate is removed from the rear net and then the rear net is inserted into the rear net coupling part and fixed. The safety net of the fan, characterized in that combined with.
The method of claim 1, wherein a rectangular case with an open inside and an open side is formed at a lower central portion of the rear net, and a support frame having an end vertically coupled to the bottom surface of the case and provided to be retractable from the case. A safety net of a fan, characterized in that it is provided with a support member that is in close contact with an outer circumferential surface, and an elastic spring that elastically supports the support from the inside of the case so that the support is firmly in close contact with the stand.

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