Ceiling fan

Abstract

The utility model relates to the field of ceiling fans, in particular to a ceiling fan which comprises an outer rotor motor, a main fan blade assembly and an auxiliary fan blade assembly, and the outer rotor motor drives the main fan blade assembly and the auxiliary fan blade assembly to rotate synchronously. And meanwhile, the auxiliary fan blade assembly disturbs the airflow collected in the inner airflow area B to vertically flow downwards, so that air flow is enhanced, a user can feel increase of the air volume below the inner airflow area B, and the advantage that the airflow vertically flows downwards is enhanced is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ceiling fan, specifically relates to a ceiling fan.

BACKGROUND

[0002] The ceiling fan lamp on the market is provided with a lamp for lighting on the basis of the ceiling fan, and the design of the ceiling fan and the lamp is integrated, so that the ceiling fan meets the demand of the fan and has the dual function of lighting, and is loved by the public in the market.

[0003] However, the Chinese utility model patent of prior art CN208652471U discloses an easy-to-disassemble ceiling fan lamp, in the working process of the ceiling fan lamp, the air flow effect of the airflow area obliquely below the ceiling fan is better than that of the airflow area vertically below the ceiling fan, and due to the airflow distribution of small downward wind force in the middle area and large downward wind force in the edge area during rotation, the user feels very weak wind when standing directly below the ceiling fan, therefore, the wind power of the ceiling fan lamp is insufficient to meet the user's demand.

[0004] In addition, a wind volume compensation structure of a multi-layer fan blade is disclosed in a Chinese utility model patent CN214998434U, in the prior art, the driving mode between the driving wind wheel and the compensation wind wheel fixedly connected to the transmission middle shaft is through the motor driving the transmission middle shaft, and then driving the driving wind wheel and the compensation wind wheel to rotate together. The compensation wind wheel in the prior art is essentially a driving wind wheel structure reduced in proportion, which rotates together with the driving wind wheel, equivalent to a part of the driving wind wheel, and cannot effectively act on the corresponding air area to enhance air flow, so the compensation wind volume has very weak effect.

[0005] In view of the above technical problems, the utility model is hereby researched and proposed.

UTILITARY MODEL CONTENT

[0006] The utility model aims at overcoming the defects of the prior art, providing a ceiling fan, by setting up the auxiliary fan blade assembly, the outer rotor motor drives the main fan blade assembly and the auxiliary fan blade assembly to rotate together, the main fan blade assembly rotates to disturb the airflow of the outer airflow area A, and the auxiliary fan blade assembly rotates to disturb the airflow of the inner airflow area B, thereby strengthening the vertical downward flow of the airflow of the inner airflow area B, solving the problem of insufficient wind volume of the existing ceiling fan. The ceiling fan has the advantage of strengthening the vertical downward flow of the airflow.

[0007] The utility model is realized through the following technical schemes:

[0008] The utility model provides a kind of ceiling fan, including outer rotor motor, main fan blade assembly, auxiliary fan blade assembly and hoisting assembly, the outer rotor motor includes rotor assembly and stator assembly, the main fan blade assembly is connected with the upper portion of rotor assembly, the hoisting assembly is connected with stator assembly, the main fan blade assembly axial oblique lower side is formed with the outer airflow area A that can be disturbed by main fan blade assembly airflow flow, the main fan blade assembly directly below is formed with inner airflow area B, the lower portion of rotor assembly is connected with and located the auxiliary fan blade assembly below main fan blade assembly, the auxiliary fan blade assembly is configured to rotate with rotor assembly with main fan blade assembly, to strengthen the airflow vertical downward flow of inner airflow area B that is disturbed.

[0009] As the above-mentioned ceiling fan, the hoisting assembly includes a mounting seat connected to the ceiling, and a housing arranged below the mounting seat, further comprising a hanger rod arranged between the mounting seat and the housing.

[0010] As the above-mentioned ceiling fan, the rotor assembly includes a rotating shell, the upper end of the rotating shell is fixedly connected to the main fan blade assembly, the lower end of the rotating shell is fixedly connected to the auxiliary fan blade assembly, the outer rotor motor drives the rotating shell to rotate, thereby driving the main fan blade assembly to rotate to disturb the airflow in the outer airflow area A, and driving the auxiliary fan blade assembly to rotate to disturb the airflow in the inner airflow area B.

[0011] As the above-mentioned ceiling fan, the auxiliary fan blade assembly includes an annular plate connected to the lower portion of the outer rotor motor, a plurality of ventilation holes for airflow flow are formed in the annular plate, the auxiliary fan blade assembly further includes a blade set, the blade set is composed of a plurality of thin blades distributed at equal intervals around the outer edge of the annular plate, the cross section of the thin blade is arc-shaped.

[0012] As the above-mentioned ceiling fan, the blade set is provided with two groups, and the two groups of blade sets are respectively distributed on the two sides of the annular plate.

[0013] As the above-mentioned ceiling fan, the thin blades in the two groups of blade sets are relatively misaligned.

[0014] As the above-mentioned ceiling fan, the middle part of the blade set is further provided with a reinforcing plate for strengthening the structural connection strength of the thin blades.

[0015] As the above-mentioned ceiling fan, the blade set further includes a flange portion for connecting the ends of the plurality of thin blades into one body to strengthen the structural connection strength of the blade set.

[0016] As the above-mentioned ceiling fan, the main fan blade assembly includes a positioning plate arranged between the hoisting assembly and the outer rotor motor, and the main fan blade assembly is fixedly connected to the upper end of the rotating shell of the outer rotor motor through the positioning plate.

[0017] The auxiliary fan blade assembly is arranged below the main fan blade assembly, and a gap exists between the auxiliary fan blade assembly and the main fan blade assembly to form an air flow channel.

[0018] Compared with the prior art, the ceiling fan has the following advantages:

[0019] 1、the utility model discloses a drive outer rotor motor rotates and drives the rotor assembly of outer rotor motor to rotate to make the main fan blade assembly and auxiliary fan blade assembly rotate with the rotor assembly and realize the same rotation, compared with the ceiling fan of prior art adopts single layer fan blade structure, the main fan blade assembly rotates to disturb the air flow of outer air flow area A and flows down, and the auxiliary fan blade assembly disturbs the air flow of inner air flow area B and flows down vertically, thereby enhancing air flow, so that the user can also feel the increase of air volume under the inner air flow area B.

[0020] 2、the utility model discloses the technical scheme of having the flange part on the auxiliary fan blade assembly, and the plurality of thin blades of the blade group are connected integrally through the flange part, the strength of the auxiliary fan blade assembly is strengthened, in the long -term working process of the ceiling fan, the risk that the thin blade of the auxiliary fan blade assembly falls due to aging can be reduced, and the beneficial effect of strengthening structure is obtained.

[0021] 3、the fan blade of the main fan blade assembly and the leaf are connected on the rotating shell and rotate with the rotating shell through the positioning plate screw in the utility model, and the fan blade and the leaf are directly connected with the rotor part in the prior art, since the ceiling fan rotates quickly in the working process, the connection strength of the leaf is prone to accelerated damage over a long period of time, compared with the prior art, the technical scheme of the application can make the fan blade of the main fan blade assembly rotate stably, reduce the damage of the leaf, and reduce the maintenance cost. In addition, the main fan blade assembly is connected through the screw in a detachable mode, has the advantages of saving space, reducing packaging and transportation cost in packaging and transportation, and is convenient to operate in the dismounting process. Furthermore, the positioning plate is integrally processed to have uniform thickness, can increase the structural stability of the positioning plate, and has low production cost.

[0022] 4、the light source in the lamp of the utility model is below the auxiliary fan blade assembly, and due to the compact structure of the auxiliary fan blade assembly and the structural characteristics that the blade group is contained in the annular plate, the shadow caused by the shaking of the auxiliary fan blade assembly is avoided in the lamp lighting process of the ceiling fan lamp.

[0023] 5、the utility model discloses that the lamp and the hoisting assembly are connected through the corresponding flange parts in the mode of cooperation, so that the lamp does not rotate in the working process of the ceiling fan lamp, that is, the illumination area of the light source does not shake, and the eye health of the user is protected. BRIEF DESCRIPTION OF DRAWINGS

[0024] The specific embodiments of the utility model will be explained in further detail below with reference to the drawings, in which:

[0025] Figure 1 is the structure diagram of the ceiling fan of the utility model;

[0026] Figure 2 is the structure diagram of the ceiling fan of the utility model;

[0027] Figure 3 is the structure diagram of the lamp of the utility model;

[0028] Figure 4 is the front view of the outer rotor motor of the utility model;

[0029] Figure 5 is the structure diagram of the auxiliary fan blade assembly of the utility model;

[0030] Figure 6 is the top view of the auxiliary fan blade assembly of the utility model;

[0031] Figure 7 is the structure diagram of the auxiliary fan blade assembly of the utility model;

[0032] Figure 8 is the structure diagram of the auxiliary fan blade assembly of the utility model;

[0033] Figure 9 is the structure diagram of the ceiling fan of the utility model;

[0034] Figure 10 is the airflow movement state diagram of the utility model in the working state;

[0035] Figure 11 is the airflow area diagram of the utility model in the working state.

[0036] In the drawings:

[0037] 1, hoisting assembly; 11, mounting seat; 12, boom; 13, machine cover; 2, positioning plate; 3, main fan blade assembly; 4, outer rotor motor; 41, rotor assembly; 411, rotating shell; 42, stator assembly; 421, shaft core; 422, wire hole; 5, auxiliary fan blade assembly; 51, annular plate; 52, ventilation hole; 53, thin blade; 54, reinforcing plate; 55, blade group; 56, flange part; 6, lamp; 61, lamp holder; 611, protrusion; 62, light source; 63, lampshade; 631, recessed opening; 632, guide groove; 633, positioning part; 634, containing groove; A, outer airflow area; B, inner airflow area.

DETAILED DESCRIPTION

[0038] The embodiments of the utility model will be described below in detail with reference to the drawings.

[0039] As Figures 1-11 Indicated, the utility model discloses a ceiling fan, including outer rotor motor 4, main fan blade subassembly 3, auxiliary fan blade subassembly 5 and hoisting subassembly 1, outer rotor motor 4 includes rotor subassembly 41 and stator subassembly 42, main fan blade subassembly 3 is connected with the upper portion of rotor subassembly 41, hoisting subassembly 1 is connected with stator subassembly 42, the axial oblique lower portion of main fan blade subassembly 3 is formed with the outer airflow area A that can be disturbed by main fan blade subassembly 3 air flow, the lower portion of main fan blade subassembly 3 is formed with inner airflow area B, the lower portion of rotor subassembly 41 is connected with auxiliary fan blade subassembly 5 and is located below main fan blade subassembly 3, auxiliary fan blade subassembly 5 is configured to rotate with main fan blade subassembly 3 with rotor subassembly 41, to strengthen the vertical downward flow of the air flow of inner airflow area B that is disturbed. Hoisting subassembly 1 includes the mounting seat 11 that is connected with the ceiling, and the housing 13 that is arranged below the mounting seat 11, also includes the suspender 12 that is arranged between the mounting seat 11 and the housing 13.

[0040] In the embodiment, by driving outer rotor motor 4 to rotate in turn rotor subassembly 41 of outer rotor motor 4 rotates, in turn main fan blade subassembly 3 and auxiliary fan blade subassembly 5 rotate with rotor subassembly 41 and realize the same motion rotation, compared with the ceiling fan of prior art adopts single layer fan blade structure, in the embodiment, main fan blade subassembly 3 rotates to disturb the air flow gathered in the outer airflow area A downward flow, while auxiliary fan blade subassembly 5 disturbs the air flow gathered in the inner airflow area B vertical downward flow, thereby enhancing air flow, so that the user is also in the inner airflow area B below can feel the increase of air volume.

[0041] In addition, the hoisting subassembly 1 in the embodiment includes a mounting seat 11 connected to the ceiling, a housing 13 arranged below the mounting seat 11, and a suspender 12 arranged between the mounting seat 11 and the housing 13. This allows the ceiling fan to maintain a certain distance from the ceiling, preventing the ceiling from being too close to the main fan blade subassembly 3 and auxiliary fan blade subassembly 5 of the ceiling fan, ensuring that the airflow on the leeward side of the ceiling fan is not affected. At the same time, it ensures that the distance between the ceiling fan and the ground height meets the installation standard, avoiding affecting the downward airflow and reducing the air volume.

[0042] As Figure 1 , Figure 2 , Figure 4 As shown in the further scheme of the embodiment, the rotor subassembly 41 includes a rotating shell 411, the upper end of the rotating shell 411 is fixedly connected to the main fan blade subassembly 3, the lower end of the rotating shell 411 is fixedly connected to the auxiliary fan blade subassembly 5, the outer rotor motor 4 drives the rotating shell 411 to rotate, thereby driving the main fan blade subassembly 3 to rotate to disturb the airflow in the outer airflow area A, and driving the auxiliary fan blade subassembly 5 to rotate to disturb the airflow in the inner airflow area B.

[0043] The application drives the rotating shell 411 of the outer rotor motor 4, the upper end of the rotating shell 411 is locked with the main fan blade assembly 3 through screw cooperation, and the lower end of the rotating shell 411 is locked with the auxiliary fan blade assembly 5 through screw cooperation, so that the main fan blade assembly 3 and the auxiliary fan blade assembly 5 rotate with the rotor assembly 41 to realize synchronous rotation, and the air flow in the outer air flow area A and the inner air flow area B is disturbed, thereby enhancing the air flow effect.

[0044] As shown in Figures 5-8 As a further scheme of the embodiment, the auxiliary fan blade assembly 5 includes an annular plate 51 connected with the lower part of the outer rotor motor 4, a plurality of ventilation holes 52 for air flow are arranged on the annular plate 51, and the auxiliary fan blade assembly 5 further includes a blade group 55 composed of a plurality of thin blades 53 distributed at equal intervals around the outer edge of the annular plate 51, and the cross section of the thin blade 53 is arc-shaped.

[0045] In the technical scheme, the auxiliary fan blade assembly 5 is screw-connected to the lower end of the rotating shell 411 through the annular plate 51, and the auxiliary fan blade assembly 5 rotates with the rotating shell 411 to disturb the air flow collected in the inner air flow area B, thereby enhancing the vertical downward flow of the air flow in the inner air flow area B formed directly below the ceiling fan. In addition, during the operation of the ceiling fan, the outer rotor motor 4 is easy to heat due to rapid rotation, which will reduce the service life of the ceiling fan over a long period of time. In the embodiment, the ventilation holes 52 are arranged on the annular plate 51, and the air flow flows through the ventilation holes 52 to take away the heat generated by the rotation of the outer rotor motor 4, thereby playing a heat dissipation role and prolonging the service life of the ceiling fan.

[0046] As shown in Figure 5 , Figure 6 As a further preferred scheme of the embodiment, the blade group 55 is provided with two groups, and the two groups of blade groups 55 are respectively distributed on the two sides of the annular plate 51. The two groups of blade groups 55 are always covered on the outer contour of the outer rotor motor 4, and the height of the auxiliary fan blade assembly 5 is configured to be less than the height of the rotor assembly 41. The technical scheme disturbs more air flow around by arranging the two groups of blade groups 55, thereby enhancing the disturbance of the air flow collected in the inner air flow area B during rotation, so that the air flow flows vertically downward.

[0047] As shown in Figure 7 As another preferred scheme of the embodiment, the middle part of the blade group 55 is further provided with a reinforcing plate 54 for enhancing the structural connection strength of the thin blade 53. The two groups of blade groups 55 are always covered on the outer contour of the outer rotor motor 4, and the height of the auxiliary fan blade assembly 5 is configured to be less than the height of the rotor assembly 41. The technical scheme enhances the structural connection strength of the thin blade 53 by arranging the reinforcing plate 54, thereby enhancing the stability of the structure of the auxiliary fan blade assembly 5.

[0048] As shown in Figure 8As shown, as another preferred solution of this embodiment, the blade group 55 is always covered on the outer contour of the outer rotor motor 4, and the height of the auxiliary fan blade assembly 5 is configured to be smaller than the height of the rotor assembly 41. This technical solution strengthens the structural connection strength of the thin blade 53 by setting a reinforcing plate 54, thereby enhancing the stability of the auxiliary fan blade assembly 5 structure.

[0049] like Figures 5-8 As shown, further, in the embodiment, the thin blades 53 in the two groups of blade assemblies 55 are relatively staggered. Thus, the two groups of blade assemblies 55 play a role in enhancing the disturbance of more airflow and enhancing the stability of the auxiliary fan blade assembly 5 structure.

[0050] like Figures 5-8 As shown, as a further technical solution of the embodiment, the blade assembly 55 also includes a flange portion 56 for connecting the ends of the plurality of thin blades 53 into one piece to strengthen the structural connection strength of the blade assembly 55. The auxiliary blade assembly 5 connects the plurality of thin blades 53 of the blade assembly 55 into one piece by providing the flange portion 56, thereby strengthening the strength of the auxiliary blade assembly 5. During the long-term operation of the ceiling fan, the risk of the thin blades 53 of the auxiliary blade assembly 5 falling due to aging can be reduced, thereby having the beneficial effect of strengthening the structure.

[0051] like Figures 1-9 As shown, as a further solution of this embodiment, the main fan blade assembly 3 includes a positioning plate 2 arranged between the hanging assembly 1 and the outer rotor motor 4, and the main fan blade assembly 3 is relatively fixedly connected to the upper end of the rotating shell 411 of the outer rotor motor 4 through the positioning plate 2. This technical solution connects the fan blades and leaf clips of the main fan blade assembly 3 to the rotating shell 411 through the positioning plate 2 screws and rotates with the rotating shell 411. Compared with the prior art in which the fan blades and leaf clips are directly connected to the rotor part, since the ceiling fan rotates rapidly during operation, it is easy to accelerate the destruction of the leaf clip connection strength over a long period of time. In contrast, the technical solution adopted in this embodiment can make the fan blades of the main fan blade assembly 3 rotate stably, while reducing the damage to the leaf clips and reducing maintenance costs. The main fan blade assemblies 3 are connected by screws to achieve a detachable manner, which has the advantages of saving space and reducing packaging and transportation costs during packaging and transportation, making the disassembly and assembly process convenient to operate.

[0052] In addition, the positioning plate 2 is made of steel or aluminum by integral stamping. The positioning plate 2 made by integral processing has a uniform thickness, which can increase the structural stability of the positioning plate 2 and reduce production costs. Secondly, the positioning plate 2 can also be made of a relatively low-cost plastic material by integral molding, which has the advantage of reducing maintenance costs.

[0053] like Figure 9 、 Figure 10As shown, as a further scheme of the embodiment, the auxiliary fan blade assembly 5 is arranged at a position below the main fan blade assembly 3, and a gap exists between the auxiliary fan blade assembly 5 and the main fan blade assembly 3 to form an air flow channel. In the technical scheme, the air flow collected in the inner air flow area B includes a part of the air flow generated in the process of disturbing the main fan blade assembly 3, and the air flow is collected through the air flow channel between the main fan blade assembly 3 and the auxiliary fan blade assembly 5 to increase the air inflow of the auxiliary fan blade assembly 5, and then the auxiliary fan blade assembly 5 rotates to increase the air flow of the disturbed air flow flowing downward, and the heat generated by the outer rotor motor 4 can be exchanged with the outside air to play a heat dissipation role.

[0054] As shown in the drawings, Figures 1-11 As shown, as a further scheme of the embodiment, the ceiling fan further includes a lamp 6, the lamp 6 includes a lamp holder 61 connected with the stator assembly 42, and a light source 62 arranged in the lamp holder 61 for lighting, and further includes a lampshade 63 detachably and cooperatively connected on the lamp holder 61. The ceiling fan is used for combining the functions of promoting air flow and the lamp 6 for lighting, and has a dual function of ventilation and lighting.

[0055] In addition, in the technical scheme, the light source 62 in the lamp 6 is below the auxiliary fan blade assembly 5, and due to the compact structure of the auxiliary fan blade assembly 5 and the structural feature that the blade group 55 is accommodated in the annular plate 51, thus in the lighting process of the lamp 6 of the ceiling fan, the rotation of the auxiliary fan blade assembly 5 can avoid the shaking shadow.

[0056] As shown in the drawings, Figure 1 , Figure 2 , Figure 4 As shown, as a further scheme of the embodiment, the upper part of the stator assembly 42 is relatively fixedly connected with the hoisting assembly 1, and the lower part is relatively fixedly connected with the lamp 6. In the technical scheme, the lamp 6 and the hoisting assembly 1 are cooperatively connected through the corresponding flange parts by using the stator assembly 42, so that in the working process of the ceiling fan, the lamp 6 does not rotate, that is, the lighting area of the light source 62 does not shake, and the user's eye health is protected.

[0057] As shown in the drawings, Figure 4 As shown, as a further scheme of the embodiment, the stator assembly 42 includes a hollow shaft core 421, a wire for transmitting electric energy is sleeved in the shaft core 421, a wire passing hole 422 is arranged on the side wall of the shaft core 421, the wire on the upper part of the side wall of the shaft core 421 passes through the wire passing hole 422 and is electrically connected with the outer rotor motor 4, and the wire at the bottom end of the shaft core 421 passes through the lamp holder 61 and is electrically connected with the light source 62. It should be noted that the wire mentioned in the embodiment is not indicated in the drawings.

[0058] In addition, the wire is arranged inside the shaft core 421, so that the wire is prevented from being crossed and tangled and from being damaged due to aging, and the safety of the wire is enhanced, and the wire is prevented from being exposed to improve the appearance of the ceiling fan.

[0059] As shown in Figure 3 As a preferred embodiment of the technical solution, a protrusion 611 is formed at the inner side edge of the lamp holder 61, a recess 631 is arranged at the outer edge of the lamp shade 63, the recess 631 is extended to form a guide groove 632, the end of the guide groove 632 is formed with a containing groove 634 for containing the protrusion 611, and a positioning part 633 is arranged between the containing groove 634 and the guide groove 632 to limit the protrusion 611 in the containing groove 634.

[0060] When the lamp holder 61 and the lamp shade 63 are assembled, the lamp shade 63 is held by hand, the recess 631 of the lamp shade 63 is aligned with the position of the protrusion 611 of the lamp holder 61, so that the protrusion 611 slides into the guide groove 632 from the recess 631, when the protrusion 611 slides to the end position of the containing groove 634 of the guide groove 632, the positioning part 633 limits the protrusion 611 in the containing groove 634, the lamp shade 63 is released, and the upper end surface of the containing groove 634 of the lamp shade 63 is in contact with the upper end surface of the protrusion 611 to complete the assembly, and the lamp holder 61 and the lamp shade 63 are assembled by the gravity of the lamp shade 63.

[0061] When the lamp shade 63 is disassembled, the lamp shade 63 is held by hand and slides upward, the position relationship between the protrusion 611 and the containing groove 634 is released, and then the lamp shade 63 is rotated in the direction of the guide groove 632, so that the protrusion 611 is out of the positioning part 633 and slides to the guide groove 632, and the protrusion 611 exits the recess 631 along the guide groove 632 to realize the disassembly of the lamp shade 63 and the lamp holder 61. When the lamp 6 fails during use, the assembly or disassembly between the lamp holder 61 and the lamp shade 63 can be realized by the above technical means, so that the light source 62 can be easily maintained or replaced, and the operation is simple.

[0062] As another preferred embodiment of the technical solution, a threaded part is arranged at the outer edge of the lamp holder 61, and an internal thread is arranged at the inner side of the lamp shade 63 to be connected with the threaded part of the lamp holder 61. When the lamp holder 61 and the lamp shade 63 are assembled, the lamp shade 63 is held by hand and is screwed in a direction to a specific position to lock the lamp shade 63 on the lamp holder 61 to complete the assembly. Conversely, when the lamp shade 63 needs to be disassembled, the lamp shade 63 is screwed out in the opposite direction to be separated from the lamp holder 61 to complete the disassembly. The technical solution is locked or unlocked by the threaded connection to realize the detachable connection between the lamp holder 61 and the lamp shade 63 for maintaining or replacing the light source 62, and the operation is simple. It should be noted that the embodiment is prior art and is not indicated in the figure.

[0063] As Figure 3 shown, the light source 62 is preferably an energy-saving lamp, which can be replaced by an incandescent lamp or an LED lamp. The energy-saving lamp used in the technical solution has higher energy efficiency and relatively longer service life compared with the incandescent lamp, can reduce the frequency of replacing the light source 62, and is more convenient to maintain and easier to operate compared with the LED lamp.

Claims

1. A ceiling fan, characterized by The application relates to an external rotor motor (4), a main fan blade assembly (3), an auxiliary fan blade assembly (5) and a hoisting assembly (1), wherein the external rotor motor (4) comprises a rotor assembly (41) and a stator assembly (42), the main fan blade assembly (3) is connected to the upper portion of the rotor assembly (41), the hoisting assembly (1) is connected to the stator assembly (42), an external airflow area A, which can be disturbed by the main fan blade assembly (3), is formed axially and downwardly below the main fan blade assembly (3), an internal airflow area B is formed directly below the main fan blade assembly (3), the auxiliary fan blade assembly (5) is connected to the lower portion of the rotor assembly (41) and is located below the main fan blade assembly (3), and the auxiliary fan blade assembly (5) is arranged to rotate with the main fan blade assembly (3) and the rotor assembly (41) to strengthen the vertical downward airflow of the internal airflow area B.

2. A ceiling fan as claimed in claim 1 wherein The hoisting assembly (1) comprises a mounting seat (11) connected to a ceiling, a machine cover (13) arranged below the mounting seat (11), and a hoisting rod (12) arranged between the mounting seat (11) and the machine cover (13).

3. A ceiling fan as claimed in claim 1 wherein The rotor assembly (41) comprises a rotating shell (411), the upper end of the rotating shell (411) is fixedly connected to the main fan blade assembly (3), the lower end of the rotating shell (411) is fixedly connected to the auxiliary fan blade assembly (5), and the external rotor motor (4) drives the rotating shell (411) to rotate so as to drive the main fan blade assembly (3) to rotate to disturb the airflow of the external airflow area A and drive the auxiliary fan blade assembly (5) to rotate to disturb the airflow of the internal airflow area B.

4. A ceiling fan as claimed in claim 1 wherein The auxiliary fan blade assembly (5) comprises an annular plate (51) connected to the lower portion of the external rotor motor (4), a plurality of ventilation holes (52) are formed in the annular plate (51) for airflow, the auxiliary fan blade assembly (5) further comprises a blade group (55) composed of a plurality of thin blades (53) which are equidistantly and circumferentially arranged at the outer edge of the annular plate (51), and the cross section of the thin blade (53) is arc-shaped.

5. A ceiling fan as claimed in claim 4 wherein The blade group (55) is provided with two groups, and the two groups of blade groups (55) are respectively arranged on the two sides of the annular plate (51).

6. A ceiling fan as claimed in claim 5 wherein The thin blades (53) in the two groups of blade groups (55) are oppositely arranged.

7. A ceiling fan as claimed in claim 4 wherein The middle portion of the blade group (55) is further provided with a reinforcing plate (54) for strengthening the structural connection strength of the thin blades (53).

8. A ceiling fan as claimed in claim 4 wherein The blade group (55) further comprises a flange portion (56) for connecting the ends of the thin blades (53) into one body to strengthen the structural connection strength of the blade group (55).

9. A ceiling fan as claimed in claim 1 wherein The main fan blade assembly (3) comprises a positioning plate (2) arranged between the hoisting assembly (1) and the external rotor motor (4), and the main fan blade assembly (3) is fixedly connected to the upper end of the rotating shell (411) of the external rotor motor (4) through the positioning plate (2).

10. A ceiling fan as claimed in claim 1 wherein The auxiliary fan blade assembly (5) is arranged below the main fan blade assembly (3), and a gap exists between the auxiliary fan blade assembly (5) and the main fan blade assembly (3) to form an airflow channel.

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