KR102735671B1 - Ceiling fan - Google Patents

Abstract

According to an embodiment of the present disclosure, a ceiling fan comprises: a hub connected to a rotary shaft rotated by a motor; and a plurality of blades radially arranged around the hub. An inner end of each of the plurality of blades is connected to the hub, and an outer end is provided with a winglet. The winglet may be installed to be inclined toward the hub with respect to the bottom surface of each of the plurality of blades. Other various embodiments are possible.

Description

Ceiling fan to prevent fluid separation {CEILING FAN}

The present invention relates to a ceiling fan, and more specifically, to a ceiling fan capable of reducing eddy currents generated at the outer end of blades of the ceiling fan.

A device that is installed on the ceiling and generates air circulation is called a ceiling fan. A ceiling fan consumes less power than an air conditioner or a regular fan, and because it is installed on the ceiling and generates air flow toward the floor, it can effectively convect indoor air. In other words, a ceiling fan can forcefully convect air at a relatively large capacity from a high location, the ceiling.

Typically, a ceiling fan includes a motor that provides power and a plurality of blades that are radially mounted on a hub connected to the motor's shaft. Ceiling fans used in large work spaces are equipped with long blades to generate a large amount of airflow.

However, in large ceiling fans with long blades, the outer end of the blade rotates very quickly, generating a vortex at the outer end (wingtip vortex). This vortex can generate induced drag and unnecessary vibration that resists the rotation of the blade.

These induced drag and vibrations cause problems such as energy inefficiencies in rotating the blades at a given speed, noise due to vibrations, and uneven airflow.

Korean Patent Publication No. 10-2216519 (Registered on February 9, 2021)

In order to solve the above problems, the present disclosure aims to increase the operating efficiency of a ceiling fan by eliminating drag by reducing eddy currents generated at the outer end of blades of the ceiling fan.

The problems to be solved by the inventions of the present disclosure are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A ceiling fan according to various embodiments of the present invention is disclosed to solve the above-described problems.

A ceiling fan according to one embodiment of the present disclosure comprises: a hub connected to a rotating shaft that rotates by a motor; a plurality of blades arranged radially around the hub, wherein an inner end of each of the plurality of blades is connected to the hub, and a winglet is installed at an outer end thereof, wherein the winglet can be installed so as to be inclined toward the hub with respect to a bottom surface of each of the plurality of blades.

In one embodiment, the winglet comprises a winglet plate and a fastener member, the winglet plate comprising an opening and a step formed on an outer surface of the opening, and the fastener member comprising a flange penetrating the opening and having an inner surface connected to an outer end of the blade and positionally restricted to the step on an outer surface.

In one embodiment, the inclined member of the fastener member includes a blade connecting portion that follows the direction of the blade and an inclined portion having a predetermined angle with respect to the blade connecting portion, and when the inclined portion is engaged with the opening of the winglet plate, the winglet plate can be tilted to have the predetermined angle with respect to the blade.

In one embodiment, the fastener member has a screw hole formed therein that matches a female screw formed in the blade, and a male screw penetrates the screw hole and is screwed into the female screw, thereby allowing the winglet to be secured to the blade.

In one embodiment, a plurality of embossings are formed on the outer surface of the winglet, wherein the plurality of embossings can be arranged to form one or more embossing lines along the radius of rotation of the blade.

In one embodiment, the screw head of the male screw has the same shape as the embossing, and the plurality of embossings and the male screw together can form an embossing line.

In one embodiment, each of the plurality of blades may be equipped with a winglet that is tilted at an angle opposite to the winglet installed on the neighboring blade.

In one embodiment, the winglets installed on the plurality of blades may be installed such that the front end is positioned at a first rotation radius and the rear end is positioned at a second rotation radius greater than the first rotation radius, so that each winglet has a predetermined angle with respect to the rotation direction of the blade.

Other specific details of the present invention are included in the detailed description and drawings.

A ceiling fan according to an embodiment of the present invention can improve the operating efficiency of the ceiling fan by reducing eddy currents by using winglets installed on the outer end of the blade.

Additionally, the winglet according to the embodiment of the present invention may be tilted at a certain angle with respect to the blade, thereby improving the airflow of the blade.

In addition, the winglet according to the embodiment of the present invention is tilted at a certain angle with respect to the rotational direction of the blade, so that considering the characteristics of a ceiling fan rotating in place, the influence of the reduced vortex in the winglet on the rotation of the next blade can be eliminated, thereby bringing about higher operating efficiency.

In addition, a plurality of embossing lines are formed on the outer surface of the winglet according to the embodiment of the present invention, thereby reducing the tip vortex region in the winglet, thereby increasing the wind volume and reducing noise.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

Various embodiments are described with reference to the drawings, wherein like reference numerals are used to refer to like elements generally. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it will be apparent that such embodiments may be practiced without these specific details.
FIG. 1 is a perspective view illustrating a ceiling fan according to one embodiment of the present disclosure.
FIG. 2 is a perspective view of a blade having a winglet installed according to one embodiment of the present disclosure.
FIG. 3 is a side view of a winglet according to one embodiment of the present disclosure.
FIG. 4 is an exploded perspective view of a winglet and blade according to one embodiment of the present disclosure.
FIG. 5 is an exploded front view of a winglet and blade according to one embodiment of the present disclosure.
FIG. 6 is an exploded front view of a winglet and blade according to another embodiment of the present disclosure.
FIG. 7 is a plan view of winglets installed at different angles to adjacent blades in a ceiling fan according to one embodiment of the present disclosure.
FIG. 8 illustrates a plurality of protrusions formed on an outer surface of a winglet according to one embodiment of the present disclosure.
FIG. 9 is a plan view from above of a ceiling fan in which winglets are installed at a predetermined angle with respect to the rotational direction of the blades according to one embodiment of the present disclosure.
FIG. 10 is a perspective view illustrating a ceiling fan according to one embodiment of the present disclosure.
FIG. 11 is a plan view from above of a ceiling fan in which a support structure is installed at a predetermined angle with respect to the rotational direction of the blade according to one embodiment of the present disclosure.
FIG. 12 is an exploded perspective view of a support structure and a blade according to one embodiment of the present disclosure.
FIG. 13 is a perspective view illustrating a ceiling fan according to one embodiment of the present disclosure.
FIG. 14 is a perspective view of an auxiliary blade according to one embodiment of the present disclosure.
FIG. 15 is a side view of a support structure according to one embodiment of the present disclosure.
FIG. 16 illustrates a bottom surface of an auxiliary blade according to one embodiment of the present disclosure.

Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more of the aspects. It will be apparent to one skilled in the art, however, that such aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth specific exemplary aspects of one or more of the aspects in detail. It should be understood, however, that these aspects are exemplary and that any of the various methods of the principles of the various aspects may be utilized, and the disclosed teachings are intended to encompass all such aspects and their equivalents. In particular, the terms “embodiment,” “example,” “aspect,” “example,” and “example” as used herein are not to be construed as being preferred or advantageous over other aspects or designs.

Hereinafter, regardless of the drawing symbols, identical or similar components are given the same reference numerals and redundant descriptions thereof are omitted. In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof is omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings.

Although the terms first, second, etc. are used to describe various elements or components, it is to be understood that these elements or components are not limited by these terms. These terms are merely used to distinguish one element or component from another element or component. Accordingly, it is to be understood that a first element or component referred to below may also be a second element or component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with a meaning that can be commonly understood by a person of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries shall not be ideally or excessively interpreted unless explicitly specifically defined.

Additionally, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from the context, "X employs A or B" is intended to mean either of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, "X employs A or B" can apply to any of these cases. Furthermore, the term "and/or" as used herein should be understood to refer to and include all possible combinations of one or more of the associated items listed.

Also, it should be understood that the terms "comprises" and/or "comprising" mean the presence of the features and/or components, but do not preclude the presence or addition of one or more other features, components, and/or groups thereof. Also, unless otherwise specified or clear from the context to refer to the singular form, the singular form as used in the specification and claims should generally be construed to mean "one or more."

When it is said that a component is “connected” or “connected” to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. On the other hand, when it is said that a component is “directly connected” or “connected” to another component, it should be understood that there are no other components in between.

When elements or layers are referred to as being "on" or "on" another element or layer, this includes not only directly on the other element or layer, but also whether or not there are other elements or layers intervening. Conversely, when elements or layers are referred to as being "directly on" or "directly above" another element or layer, this includes whether or not there are other elements or layers intervening.

The spatially relative terms "below," "beneath," "lower," "above," "upper," and the like may be used to easily describe a component's relationship to other components as depicted in the drawings. The spatially relative terms should be understood to include different orientations of the component during use or operation in addition to the orientations depicted in the drawings.

The purpose and effect of the present invention, and the technical configurations for achieving them, will become clear with reference to the embodiments described in detail below with the attached drawings. In explaining the present invention, if it is judged that a specific description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of the functions in the present invention, and these may vary depending on the intention or custom of the user or operator.

However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided only to make the present invention complete and to fully inform those skilled in the art of the scope of the disclosure, and the present invention is defined only by the scope of the claims. Therefore, the definition should be made based on the contents throughout this specification.

FIG. 1 is a perspective view illustrating a ceiling fan (10) according to one embodiment of the present disclosure.

Referring to FIG. 1, a ceiling fan (10) according to one embodiment of the present disclosure may include a rotation shaft (11), a hub (20), and a plurality of blades (100).

The upper part of the rotation shaft (11) can be fixed to the ceiling, and the lower part can be connected to a hub (20). The hub (20) can be rotatably connected to the rotation shaft (11).

The hub (20) can be connected to a plurality of blades (100) arranged radially based on a central axis connected to the rotation axis (11).

In one embodiment, the hub (20) may be configured to rotate about a rotation axis (11), and a motor (not shown) that provides rotational force to the rotation axis (11) may be installed within the hub (20). In another embodiment, the motor (not shown) may be installed on the ceiling, and the hub (20) and the rotation axis (11) may be configured to rotate simultaneously.

A plurality of blades (100) may be polar-arrayed on the outer surface of the hub (20). When viewed in the axial direction of the blades (100), the blades (100) may be radially arranged with the rotation axis (11) as the center. In the present disclosure, an embodiment having six blades (100) is described, but in other embodiments, the number of blades (100) may be various, such as four or five. The plurality of blades (100) may each include a first blade (101), a second blade (102), a third blade (103), a fourth blade (104), a fifth blade (105), and a sixth blade (106).

Each of the plurality of blades (100) can have its leading edge tilted relative to a plane perpendicular to the rotation axis (11).

In various embodiments of the present disclosure, the inner ends of the plurality of blades (100) may be fixed to the hub (20), and winglets (200) may be installed at the outer ends. A blade (100) on which a winglet (200) is not installed may reduce the efficiency of airflow and generate noise due to a vortex phenomenon occurring at the outer end end. The vortex phenomenon may be called a wingtip vortex. The vortex occurs when the air circulating on the blade (100) becomes unstable at the end of the blade (100), and may generate a drag that resists the rotation of the blade (100), which means that more energy is required for the rotation of the blade (100).

The winglet (200) according to various embodiments of the present disclosure can improve energy efficiency by reducing the eddy phenomenon that may occur at the outer end of the blade (100).

FIG. 2 is a perspective view of a blade (100) having a winglet (200) installed according to one embodiment of the present disclosure.

Referring to FIG. 2, a winglet (200) installed on an outer end of a blade (100) may include a winglet plate (210) and a fastener member (220). The fastener member (220) may be a member that secures the winglet plate (210) to the outer end of the blade (100). The fastener member (220) may secure the winglet plate (210) to the blade (100) using one or more screws (221).

In addition, the fastener member (220) may be a member that allows the winglet plate (210) to have a predetermined angle with respect to the blade (100). This will be described in detail later.

FIG. 3 is a side view of a winglet (200) according to one embodiment of the present disclosure.

Referring to FIG. 3, a winglet plate (210) according to one embodiment may have a width that increases linearly or nonlinearly from a front end (211) to a rear end (212) with respect to the direction in which a blade (100) rotates. In one embodiment, both ends (212a, 212b) of the rear end (212) of the winglet plate (210) may have a pointed shape. In other words, the rear end (212) of the winglet plate (210) may have a forwardly recessed shape. In the present disclosure, by making both ends (212a, 212b) of the winglet plate (210) have a pointed shape, a vortex phenomenon occurs at both ends (212a, 212b). The two ends (212a, 212b) of the winglet plate (210) with a pointed shape toward the rear can reduce drag and noise caused by the vortex by moving the vortex generated at the outermost end of the blade (100) to the two ends (212a, 212b) and reducing the size of the vortex phenomenon.

FIG. 4 is an exploded perspective view of a winglet (200) and a blade (100) according to one embodiment of the present disclosure. FIG. 5 is an exploded front view of a winglet (200) and a blade (100) according to one embodiment of the present disclosure. FIG. 6 is an exploded front view of a winglet (200) and a blade (100) according to another embodiment of the present disclosure.

Referring to FIG. 4, a winglet (200) according to one embodiment of the present disclosure may include a winglet plate (210) and a fastener member (220). The fastener member (220) may be a member that secures the winglet plate (210) to an outer end of a blade (100). The fastener member (220) may secure the winglet plate (210) to the blade (100) using one or more screws (221).

In one embodiment, the winglet plate (210) may be formed with an opening (213) and a step (214). The step (214) may be a groove that is offset outward from the opening (213).

The fastener member (220) may include a flange (222) and an inclined member (223). The flange (222) may be formed on an outer end of the inclined member (223). The inclined member (223) may be installed penetrating the opening (213) of the winglet plate (210), but the flange (222) may be positionally limited to a step portion (214) of the winglet plate (210), so that the winglet plate (210) and the fastener member (220) may be assembled.

The inner end of the inclined member (223) is in contact with the outer end of the blade (100), so that the winglet plate (210) and the fastener member (220) can be connected to the blade (100).

When the fastener member (220) is connected to the blade (100), the female screw (110) of the blade (100) and the screw hole (224) of the fastener member (220) can be matched. The male screw (221) passes through the screw hole (224) of the fastener member (220) and is screw-connected to the female screw (110) of the blade (100), thereby fixing the winglet (200) and the blade (100).

Referring to FIG. 5, the inclined member (223) according to one embodiment may include a blade connecting portion (223a) and an inclined portion (223b). The blade connecting portion (223a) may have a shape corresponding to the blade (100), and the inclined portion (223b) may have a shape inclined at a certain angle with respect to the blade connecting portion (223a). The blade connecting portion (223a) of the fastener member (220) may be matched with the opening (213) of the winglet plate (210) through which the fastener member (220) is penetrated and assembled, and the inclined portion (223b) of the fastener member (220) may be matched with the step portion (214). Through this, the winglet plate (210) may have a first angle (a1) with respect to a direction perpendicular to the rotation radius of the blade (100).

In one embodiment, the winglet plate (210) may be configured to have a first angle (a1) with respect to the vertical direction of the blade (100) so that the area where air flows out from the bottom surface of the blade (100) becomes narrower than the area where air flows in from the top surface of the blade (100). This allows the flow rate and velocity of air through the ceiling fan (10) to be increased.

In contrast to the embodiment described in FIG. 5, the inclined member (233) according to another embodiment described in FIG. 6 includes a blade connecting portion (233a) and an inclined portion (233b), but the inclined portion (233b) may be inclined in the opposite direction to the inclined portion (223b) of the inclined member (223) described in FIG. 5. Accordingly, the winglet plate (210) may have a second angle (a2) that is inclined opposite to the first angle (a1) with respect to the vertical direction of the blade (100). Accordingly, the winglet plate (210) illustrated in FIG. 6 may be configured so that the area of the bottom surface of the blade (100) is wider than the area of the top surface of the blade (100). This embodiment may be applied when the rotational direction of the ceiling fan (10) is configured oppositely, and the ceiling fan (10) is driven in the direction in which air is introduced from the bottom surface of the blade (100) and discharged to the top surface.

FIG. 7 is a plan view of winglets (200) installed at different angles on neighboring blades (100) in a ceiling fan (10) according to one embodiment of the present disclosure. According to one embodiment of the present disclosure, a winglet (200) may be installed on a blade (100) such that the upper portion of the winglet plate (210) of the winglet (200) is tilted inward (in the direction from the blade (100) toward the hub (20)) as shown in FIG. 7 (a), and a winglet (200) may be installed on a neighboring blade (100) such that the upper portion of the winglet plate (210) of the winglet (200) is tilted outward (in the direction of the rotation radius of the blade (100)) as shown in FIG. 7 (b).

For example, winglets (200) may be installed on the first blade (101), the third blade (103), and the fifth blade (105) of Fig. 1 as in (a) of Fig. 7, and winglets (200) may be installed on the second blade (102), the fourth blade (104), and the sixth blade (107) as in (b) of Fig. 7.

The winglet (200) installed on the blade (100) may generate vortices at the top and bottom. Unlike an airplane, the ceiling fan (10) rotates again in the area where one blade (100) rotates, so the vortex generated at the end of the blade (100) may interfere with the rotation of the next blade (100). Therefore, if the neighboring blades (100) have winglets (200) that are tilted in different directions, the influence of the vortex generated at the top and bottom of the winglet (200) on the rotation of the winglet (200) of the next blade (100) can be eliminated.

Therefore, in the ceiling fan (10) according to this embodiment, the vortex generated at the outer end of the blade (100) is minimized through the inclined winglet (200), and at the same time, the adverse effect of the vortex generated in the winglet (200) of any blade (100) on the rotation of the winglet (200) of the neighboring blade (100) is minimized, thereby improving the energy efficiency for rotating a plurality of blades (100) in the ceiling fan (10).

FIG. 8 illustrates a plurality of protrusions formed on an outer surface of a winglet (200) according to one embodiment of the present disclosure.

Even if a winglet (200) is installed on the outer end of a blade (100) according to various embodiments of the present disclosure, flow separation that impedes smooth air flow may occur along the winglet plate (210) of the winglet (200). This may cause vibration and noise in the winglet (200). Accordingly, in the present disclosure, as illustrated in FIG. 8, a plurality of embossings (240) may be formed on the outer surface of the winglet (200) (or the winglet plate (210)). The plurality of embossings (240) may reduce a tip vortex region that causes flow resistance on the outer surface of the winglet plate (210), thereby increasing airflow and reducing noise.

In one embodiment, the embossing (240) may be formed on the outer surface of the winglet plate (210) and also on the outer surface of the fastener member (220). A screw hole (224) for a male screw (221) is formed on the outer surface of the fastener member (220), and the screw head (221a) of the male screw (221) coupled to the screw hole (224) also has substantially the same shape as the embossing (240) and may play the same role as the embossing (240).

In one embodiment, a plurality of embossings (240) may be formed on the outer surface of the winglet (200), and the plurality of embossings (240) may form one or more embossing lines (embossing lines, el) along the rotational radius of the blade (100). The one or more embossing lines (el) may improve the airflow on the outer surface of the winglet plate (210) and reduce noise according to the rotation of the blade (100).

FIG. 9 is a plan view from above of a ceiling fan (10) in which winglets (200) are installed at a predetermined angle with respect to the rotational direction of blades (100) according to one embodiment of the present disclosure.

Referring to FIG. 9, a winglet (200) according to one embodiment may be arranged to have an inclination angle (a3) with respect to the rotational direction. For example, the inclination angle (a3) may be 3 to 10 degrees.

Based on the rotational direction of the blade (100), the front end of the winglet (200) can be positioned closer to the hub (20) than the rear end. The front end of the winglet (200) can be positioned at a first rotation radius (R1), and the rear end of the winglet (200) can be positioned at a second rotation radius (R2) greater than the first rotation radius (R1).

When the blade (100) rotates, a vortex may also be formed in the winglet (200). Since the ceiling fan (10) has multiple blades (100) rotating in place, a vortex formed by one blade (100) affects the rotation of the neighboring blade (100).

However, in the ceiling fan (10) according to one embodiment of the present disclosure, the winglet (200) installed on the outer end of the blade (100) is installed to have an inclination angle (a3) with respect to the rotational direction, so that the vortex formed at the outer end of the blade (100) can be prevented from affecting the neighboring blade (100). For example, in FIG. 9, the vortex formed at the rear end of the first winglet (201) of the first blade (101) can not affect the front end of the second winglet (202) of the neighboring second blade (102).

Through this, the ceiling fan (10) according to various embodiments of the present disclosure can improve the energy efficiency of the ceiling fan (10) by minimizing the vortex itself formed at the outer end of the blade (100) and improving the air flow. In addition, the ceiling fan (10) according to various embodiments of the present disclosure can minimize the influence of the vortex generated from the previously rotated blade (100) on the next blade (100) by considering the characteristic of the ceiling fan (10) rotating in place, thereby enabling the ceiling fan (10) to operate with higher efficiency.

FIG. 10 is a perspective view illustrating a ceiling fan (10) according to one embodiment of the present disclosure.

Referring to FIG. 10, a ceiling fan (10) according to one embodiment of the present disclosure may include a rotation shaft (11), a hub (20), and a plurality of blades (100). The upper end of the rotation shaft (11) may be fixed to a ceiling, and the lower end may be connected to the hub (20). The hub (20) may be rotatably connected with respect to the rotation shaft (11). The hub (20) may be connected to a plurality of blades (100) that are radially arranged based on a central axis connected to the rotation shaft (11).

In one embodiment, the hub (20) may be configured to rotate about a rotation axis (11), and a motor (not shown) that provides rotational force to the rotation axis (11) may be installed within the hub (20). In another embodiment, a motor (not shown) may be installed on the ceiling side, and the hub (20) and the rotation axis (11) may be configured to rotate simultaneously.

A plurality of blades (100) may be polar-arrayed on the outer surface of the hub (20). When viewed in the axial direction of the blades (100), the blades (100) may be radially arranged with the rotation axis (11) as the center. In the present disclosure, an embodiment having six blades (100) is described, but in other embodiments, the number of blades (100) may be various, such as four or five. The plurality of blades (100) may each include a first blade (101), a second blade (102), a third blade (103), a fourth blade (104), a fifth blade (105), and a sixth blade (106).

In various embodiments of the present disclosure, a support structure (300) connecting a blade (100) and an adjacent blade (100) among a plurality of blades (100) may be further installed. The support structure (300) may be a straight member.

For example, the support structure (300) may be connected to the first blade (101), the neighboring second blade (102) and the sixth blade (106) by the support structure (300). The support structure (300) may fix the blades (100) to each other to prevent the blades (100) from shaking. This may prevent noise that may be generated by the vibration of the support structure (300) and improve the airflow generated by the ceiling fan (10).

FIG. 11 is a plan view from above of a ceiling fan (10) in which a support structure (300) is installed at a predetermined angle with respect to the rotational direction of a blade (100) according to one embodiment of the present disclosure.

Referring to FIG. 11, the support structure (300) according to one embodiment may be positioned to have a certain angle with respect to the rotational direction. For example, with respect to the rotational direction of the blade (100), the front end (301) of the support structure (300) may be positioned closer to the hub (20) than the rear end (302). The front end (301) of the support structure (300) may be positioned at a third rotational radius (R3), and the rear end (302) of the support structure (300) may be positioned at a fourth rotational radius (R4) greater than the third rotational radius (R3).

According to one embodiment of the present disclosure, since two support structures (300) are staggered between the blades (100) that are connected in the same rotational radius of the neighboring blades (100), the entire structure composed of the blades (100) and the support structures (300) can be made more stable and stronger. In addition, the support structures (300) can provide stronger resistance to dynamic loads such as vibrations.

FIG. 12 is an exploded perspective view of a support structure (300) and a blade (100) according to one embodiment of the present disclosure.

Referring to FIG. 12, the front end (301) of the support structure (300) according to one embodiment of the present disclosure may be connected to cover the upper surface of the blade (100), and the rear end (302) may be connected to cover the lower surface of the blade (100).

The blade (100) connected by the support structure (300) of the present disclosure can provide a uniform air flow with greater resistance to dynamic loads such as vibrations because the two support structures (300) are fixed at the upper and lower surfaces.

In one embodiment, the support structure (300) can be secured to the blade (100) using a securing member (303). The securing member (303) can include a bolt or a rivet. The securing member (303) can penetrate the support structure (300) to secure the support structure (300) to the lower surface or upper surface of the blade (100).

FIG. 13 is a perspective view illustrating a ceiling fan (10) according to one embodiment of the present disclosure.

Referring to FIG. 13, a ceiling fan (10) according to one embodiment of the present disclosure may further have an auxiliary blade (320) installed. The auxiliary blade (320) may be connected to a support structure (300).

In one embodiment, the auxiliary blade (320) may be positioned in the inner space (310) (see FIG. 10) defined by the support structure (300) and the blade (100). The auxiliary blade (320) may be connected to an inner surface of the support structure (300) close to the hub (20).

In a ceiling fan (10), the relative speed of the blade (100) may vary depending on the rotation radius. The closer to the outer end of the blade (100) the smaller the rotation radius is to the hub (20), the greater the relative speed of the blade (100). Accordingly, the blade (100) cannot generate an overall uniform amount of airflow over the rotation radius. The present disclosure can improve the blade (100) to generate an overall uniform airflow by arranging the auxiliary blade (320) in the inner space (310) close to the hub (20).

In other words, the relative speed of the blade (100) may vary depending on the rotation radius in the ceiling fan (10). In particular, the speed of the blade (100) may be relatively slow in an area of a small rotation radius adjacent to the hub (20), and conversely, the relative speed may be faster near the outer end of the blade (100). As a result, the blade (100) may not be able to generate a constant amount of air flow throughout the entire rotation radius. Therefore, the present disclosure can improve the ability of the blade (100) to generate a uniform air flow throughout the entire rotation radius by arranging the auxiliary blade (320) in the inner space (310) adjacent to the hub (20).

FIG. 14 is a perspective view of an auxiliary blade (320) according to one embodiment of the present disclosure.

Referring to FIG. 14, an auxiliary blade (320) according to one embodiment may be installed on the inner surface of the support structure (300).

The auxiliary blade (320) may include a main blade (321) and an auxiliary blade (322). The main blade (321) may be positioned forward in the rotational direction of the sealing fan (10). For example, the main blade (321) may be positioned close to the forward end (301) of the support structure (300).

The auxiliary blade (322) may be formed to extend from the main blade (321) and may be configured to rotate with respect to the main blade (321) based on the hinge axis (x). The auxiliary blade (322) may be rotatable with respect to the main blade (321), thereby controlling the amount of air flow generated by the auxiliary blade (320) and improving noise generated through the auxiliary blade (320).

The auxiliary wing (322) of the auxiliary blade (320) can adjust the rotation angle about the hinge axis (x) by fitting one side of the auxiliary wing tip (322a) into the adjustment opening (330) formed in the support structure (300).

FIG. 15 is a side view of a support structure (300) according to one embodiment of the present disclosure.

Referring to FIG. 15, the adjustment opening (330) according to one embodiment may be formed in a side surface of the support structure (300) and may be opened through the support structure (300) as shown, or may be a groove formed in one side surface of the support structure (300).

The adjustment opening (330) may include a plurality of hook grooves (331) into which the auxiliary wing tips (322a) of the auxiliary wings (322) can be fitted.

The auxiliary wing (322) is made of a deformable material so that the installer of the ceiling fan (10) can hang the auxiliary wing tip (322a) of the auxiliary wing (322) on the hanging groove (331) to have an appropriate angle. The auxiliary wing (322) can be made of a material such as TPU, TPE, and PP.

Through this, the angle of the auxiliary vane (322) can be adaptively adjusted according to the environment in which the ceiling fan (10) is installed and the rotation speed of the ceiling fan (10), thereby providing optimal air flow.

FIG. 16 illustrates a bottom surface of an auxiliary blade (320) according to one embodiment of the present disclosure.

Referring to FIG. 16, a slit (323) may be formed at the hinge axis (x) as a boundary between the main wing (321) and the auxiliary wing (322) of the auxiliary blade (320) according to one embodiment. The slit (323) may be a portion in which the strength of the auxiliary blade (320) is lowered so that the auxiliary wing (322) can rotate with respect to the main wing (321) at the hinge axis (x). The slit (323) may be formed along the hinge axis (x).

Meanwhile, a ceiling fan (10) according to one embodiment of the present disclosure includes: a hub (20) connected to a rotating shaft that rotates by a motor (not shown); a plurality of blades (100) arranged in a radial shape centered on the hub, and an inner end of each of the plurality of blades (100) is connected to the hub (20), and a winglet (200) is installed at an outer end thereof, wherein the winglet (200) can be installed so as to be inclined toward the hub (20) with respect to the bottom surface of each of the plurality of blades (100).

In one embodiment, the winglet (200) includes a winglet plate (210) and a fastener member (220), the winglet plate (210) includes an opening (213) and a step (214) formed on an outer surface of the opening (213), and the fastener member (220) may include a flange (222) penetrating the opening (213) and having an inner surface connected to an outer end of the blade (100) and having a position limited to the step (214) on the outer surface.

In one embodiment, the inclined member (223) of the fastener member (220) includes a blade connecting portion (223a) that follows the direction of the blade (100) and an inclined portion (223b) that has a predetermined angle with respect to the blade connecting portion (223a), and when the inclined portion (223b) is coupled to the opening (213) of the winglet plate (210), the winglet plate (210) can be inclined to have the predetermined angle with respect to the blade (100).

In one embodiment, the fastener member (220) is formed with a screw hole (224) that matches the female screw (110) formed in the blade (100), and a male screw (221) passes through the screw hole (224) and is screw-connected to the female screw (110), thereby allowing the winglet (200) to be fixed to the blade (100).

In one embodiment, a plurality of embossings (240) are formed on the outer surface of the winglet (200), and the plurality of embossings (240) can be arranged to form one or more embossing lines along the rotational radius of the blade (100).

In one embodiment, the screw head (221a) of the male screw (221) has the same shape as the embossing (240), and the plurality of embossings (240) and the male screw (221) can together form an embossing line.

In one embodiment, each of the plurality of blades (100) may be installed with a winglet (200) that is tilted at an angle opposite to that of the winglet (200) installed on the neighboring blade (100).

In one embodiment, the winglets (200) installed on the plurality of blades (100) may be installed such that the front end is positioned at a first rotation radius and the rear end is positioned at a second rotation radius greater than the first rotation radius, so that each winglet has a predetermined angle with respect to the rotation direction of the blades (100).

According to one embodiment of the present disclosure, a ceiling fan (10) includes: a hub (20) connected to a rotating shaft that rotates by a motor (not shown); a plurality of blades (100) arranged radially around the hub; and a support structure (300) of a linear member connecting neighboring blades (100) among the plurality of blades (100), wherein a front end (301) of the support structure (300) can be connected to one blade (100) at a first rotation radius, and a rear end (302) can be connected to a neighboring blade (100) at a second rotation radius that is larger than the first rotation radius.

In one embodiment, the front end (301) of the support structure (300) may be connected to the upper surface of the blade (100), and the rear end (302) may be connected to the lower surface of the blade (100).

In one embodiment, an auxiliary blade (320) may be further installed on the inner surface of the support structure (300) close to the hub (20).

In one embodiment, the auxiliary blade (320) includes a main wing (321), an auxiliary wing (322) formed to extend from the main wing (321), and the auxiliary wing (322) may be configured to be rotatable about a hinge axis (x) with respect to the main wing (321).

In one embodiment, the hinge axis (x) of the auxiliary blade (320) may be a slit formed at the boundary between the main blade (321) and the auxiliary blade (322) in the auxiliary blade (320).

In one embodiment, an adjustment opening (330) may be formed on a side surface of the support structure (300) including a plurality of hook grooves (331) into which auxiliary wing tips (322a) of the auxiliary wings (322) can be fitted.

In the specific embodiments of the present disclosure described above, components of the electronic device included in the present disclosure are expressed singularly or plurally according to the specific embodiments presented. However, the singular or plural expressions for the components are selected appropriately for the presented situation for the convenience of explanation, and the present disclosure is not limited to singular or plural components, and even components expressed in plural may be composed of singular components, or even components expressed in singular may be composed of plural components.

Meanwhile, although the detailed description of the present disclosure has described specific embodiments, it is obvious that various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be determined not only by the scope of the claims described below, but also by equivalents of the scope of the claims.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the invention is not intended to be limited to the disclosed embodiments, but is to be construed in the widest scope consistent with the principles and novel features disclosed herein.

10: Ceiling fan 100: Blade
11: Rotating shaft 110: Female screw
20 : Hub 200 : Winglet
210: Winglet plate 213: Aperture
214: Step part 220: Fastener part
221 : Male screw 221a : Screw head
222 : Flange 223 : Inclined member
223a: Blade connection part 223b: Slope part
224 : Screw hole 240 : Embossing
300 : Support structure 301 : Front end
302: Rear section 303: Fixed member
320: Auxiliary blade 321: Main wing
322 : Auxiliary wing 322a : Auxiliary wing tip
330 : Adjustment opening 331 : Hanging groove

Claims (8)

A hub connected to a rotating shaft that is rotated by a motor;
It comprises a plurality of blades arranged in a radial shape centered on the above hub,
The inner end of each of the plurality of blades is connected to the hub, and the outer end has a winglet installed.
The above winglet is installed so as to be inclined toward the hub with respect to the bottom surface of each of the plurality of blades,
The above winglet comprises a winglet plate and a fastener member,
The inclined member of the fastener member includes a blade connecting portion that follows the direction of the blade and an inclined portion that has a certain angle with respect to the blade connecting portion.
The winglet plate is tilted at a predetermined angle with respect to the blade by the above-mentioned inclined portion being engaged with the opening of the winglet plate.
Ceiling fan.
In the first paragraph,
The above winglet plate includes an opening and a step formed on the outer surface of the opening,
The fastener member includes a flange having an inner surface connected to an outer end of the blade through the opening and a position limited to the step portion on the outer surface.
Ceiling fan.
delete In the second paragraph,
The fastener member is formed with a screw hole matching the female screw formed in the blade,
The winglet is fixed to the blade by the male screw passing through the screw hole and screwing into the female screw.
Ceiling fan.
In the fourth paragraph,
A plurality of embossings are formed on the outer surface of the winglet,
The above plurality of embossings are arranged to form one or more embossing lines along the rotation radius of the blade.
Ceiling fan.
In clause 5,
The screw head of the above screw has the same shape as the above embossing,
The above plurality of embossings and the above screws together form an embossing line.
Ceiling fan.
In the second paragraph,
Each of the above plurality of blades is equipped with a winglet that is tilted at an angle opposite to that of the winglet installed on the adjacent blade.
Ceiling fan.
In the fourth paragraph,
The winglets installed on the plurality of blades are installed so that the front end is positioned at a first rotation radius and the rear end is positioned at a second rotation radius greater than the first rotation radius, so that each winglet has a certain angle with respect to the rotation direction of the blade.
Ceiling fan.