US20250334125A1

US20250334125A1 - Bladeless ceiling fan

Info

Publication number: US20250334125A1
Application number: US19/175,072
Authority: US
Inventors: Chung Hang LUI
Original assignee: Fannos Technology Limited
Priority date: 2024-04-25
Filing date: 2025-04-10
Publication date: 2025-10-30

Abstract

A bladeless ceiling fan is disclosed herein including a housing, an airflow generating assembly and a flow-diverting mechanism. The housing is formed with a first and a second circular vent. The flow-diverting mechanism can distribute an airflow generated by the blade to the first circular vent and the second circular vent, and to control airflow volume entering the first circular vent and the second circular vent, respectively. The curved airflow guiding structure between the first and the second circular vent generate the Coanda Effect, resulting in airflow redirection and attachment to the curved surface. Air from the first and second circular vent flows along exterior curvature to converge into joint directional airflow. The flow-diverting mechanism can independently regulate the airflow volume entering the first and second guiding component, thereby controlling the airflow output from the first and second circular vent, and consequently adjusting the final airflow direction.

Description

TECHNICAL FIELD

The present disclosure relates to a field of fans, and in particular to a bladeless ceiling fan.

BACKGROUND

Ceiling fans are commonly used cooling devices. The blades of ceiling fans are exposed, making them susceptible to dust accumulation. When ceiling fans are turned on, the dust on the blades can be blown into the air and pollutes the environment. Bladeless fans eliminate the issue of dust accumulation on the blades. Bladeless fans are not actually bladeless. There is actually a propeller with blades concealed in the base of the fan. Bladeless fans are “bladeless” because users can't see the blades. However, traditional bladeless fans have limitations in adjusting the airflow direction.

SUMMARY

According to various embodiments of the present disclosure, a bladeless ceiling fan is provided.
A bladeless ceiling fan, comprising:

- a housing formed with a first circular vent and a second circular vent, wherein a curved airflow guiding structure is arranged between the first circular vent and the second circular vent;
- an airflow generating assembly disposed within the housing, the airflow generating assembly comprises a blade and a fan motor driving the blade to generate airflow; and
- a flow-diverting mechanism disposed within the housing, the flow-diverting mechanism is configured to distribute an airflow generated by the blade to the first circular vent and the second circular vent, and to control airflow volume entering the first circular vent and the second circular vent, respectively.

In an embodiment, wherein the flow-diverting mechanism comprises an airflow guiding assembly and an airflow controlling assembly;

- the airflow guiding assembly surrounds the blade; the airflow guiding assembly comprises a first guiding component and a second guiding component; the first circular vent is arranged at an edge of the first guiding component, and the second circular vent is arranged at an edge of the second guiding component;
- the airflow controlling assembly comprises a first controlling component and a second controlling component; the first controlling component is provided with a first opening and a second opening and a second controlling component,; wherein the first controlling component and the second controlling component are configured to move relative to each other to open or close the first opening and the second opening; the first opening is in communication with the blade and the first guiding component, allowing the airflow from the blade to pass through the first guiding component; the second opening is in communication with the blade and the second guiding component, allowing the airflow from the blade to pass through the second guiding component.

In an embodiment, wherein the first guiding component comprises a plurality of evenly distributed first guiding plates; adjacent first guiding plates form a first airflow passage; the first airflow passage has a curved shape to reduce air resistance; and/or

- the second guiding component comprises a plurality of evenly distributed second guiding plates; adjacent second guiding plates form a second airflow passage; the second airflow passage has a curved shape to reduce air resistance.

In an embodiment, wherein the first controlling component and the second controlling component are circular in shape; the first controlling component is rotatable.
In an embodiment, wherein the airflow controlling assembly further comprises a controlling motor; the first controlling component is driven by the controlling motor to move relative to the second controlling component; the second controlling component is fixed on the second guiding component.
In an embodiment, wherein the second controlling component comprises a first baffle corresponding to the first opening and a second baffle corresponding to the second opening.
In an embodiment, wherein the housing comprises a first shell, a middle shell and a second shell, wherein the first shell, the middle shell, and the second shell are connected in sequence; the first guiding component is fixed on the first shell; the curved airflow guiding structure is a curved surface of the middle shell; the second shell is provided with an air inlet.
In an embodiment, further comprising an air filter, the air filter is fixed in a center of the second shell.
In an embodiment, further comprising sensors to monitor pollutants and allergens.
In an embodiment, further comprising a communication chip for remote control of the fan motor and the airflow controlling assembly to adjust speed and airflow direction.
Details of one or more embodiments of the present disclosure will be given in the following description and attached drawings. Other features, objects and advantages of the present disclosure will become apparent from the description, drawings, and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to better describe and illustrate the embodiments and/or examples of the contents disclosed herein, reference may be made to one or more drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed contents, the currently described embodiments and/or examples, and the best mode of these contents currently understood.

FIG. 1 illustrates a perspective view of a bladeless ceiling fan, according to an embodiment of the present disclosure;

FIG. 2 illustrates another perspective view of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 3 illustrates an exploded view of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 4 illustrates a sectional view of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 5 illustrates an exploded view of the airflow generating assembly of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 6 illustrates an exploded view of the airflow guiding assembly of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 7 illustrates an exploded view of the second guiding component of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 8 illustrates an exploded view of the airflow controlling assembly of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 9 illustrates a perspective view of the airflow controlling assembly of the bladeless ceiling fan shown in FIG. 8 ;

FIG. 10 illustrates an exploded view of the housing of the bladeless ceiling fan shown in FIG. 1 ;

FIG. 11 illustrates the airflow of a bladeless ceiling fan in a direct airflow mode, according to an embodiment of the present disclosure;

FIG. 12 illustrates the airflow of a bladeless ceiling fan in a circulating airflow mode, according to an embodiment of the present disclosure;

FIG. 13 illustrates the airflow of a bladeless ceiling fan in a 45° angle airflow mode, according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The definitions are provided to aid in describing particular embodiments, and are not intended to limit the claimed invention. The term “and/or” used herein includes any and all combinations of one or more related listed items.
Referring to FIGS. 1 and 2 , a bladeless ceiling fan 10 is provided in the embodiments of this application. Referring to FIGS. 3 and 4 , the bladeless ceiling fan 10 comprises an airflow generating assembly 100, a flow-diverting mechanism and a housing 400. The airflow generating assembly 100 and the flow-diverting mechanism are disposed within the housing. Referring to FIG. 5 , the airflow generating assembly 100 comprising a blade 120 and a fan motor 140 driving the blade 120 to generate airflow. In an embodiment, the flow-diverting mechanism can comprise an airflow guiding assembly 200 and an airflow controlling assembly 300.
The housing 400 is formed with a first circular vent 222 and a second circular vent 242, wherein a curved airflow guiding structure 401 is arranged between the first circular vent 222 and the second circular vent 242. The flow-diverting mechanism is configured to distribute an airflow generated by the blade 120 to the first circular vent 222 and the second circular vent 242, and to control airflow volume entering the first circular vent 222 and the second circular vent 242, respectively.
Due to the curved airflow guiding structure 401 between the first circular vent 222 and the second circular vent 242, the Coanda Effect can be generated, resulting in airflow redirection and attachment to the curved surface. Air from the first circular vent 222 and the second circular vent 242 flows along exterior curvature to converge into joint directional airflow. The flow-diverting mechanism can independently regulate the airflow volume entering the first guiding component 220 and the second guiding component 240, thereby controlling the airflow output from the first circular vent 222 and the second circular vent 242, and consequently adjusting the final airflow direction.
In an embodiment, the airflow guiding assembly 200 surrounds the blade 120. The airflow guiding assembly 200 comprises a first guiding component 220 and a second guiding component 240. The first circular vent 222 is arranged at the edge of the first guiding component 220. The second circular vent 242 is arranged at the edge of the second guiding component 240. Referring to FIGS. 6 and 7 , in some embodiments, the first guiding component 220 can comprise a plurality of evenly distributed first guiding plates 224. Adjacent first guiding plates 224 form a first airflow passage 226. The first airflow passage 226 has a curved shape to reduce air resistance. In some embodiments, the second guiding component 240 can comprise a plurality of evenly distributed second guiding plates 244. Adjacent second guiding plates 244 form a second airflow passage 246. The second airflow passage 246 has a curved shape to reduce air resistance.
Referring to FIGS. 8 and 9 , the airflow controlling assembly 300 surrounding the blade 120. The airflow controlling assembly 300 comprises a first controlling component 320 and a second controlling component 340, the first controlling component 320 is provided with a first opening 322 and a second opening 324. Wherein, the first controlling component 320 and the second controlling component 340 are configured to move relative to each other to open or close the first opening 322 and the second opening 324. The first opening 322 is in communication with the blade 120 and the first guiding component 220, allowing the airflow from the blade 120 to pass through the first guiding component 220. The second opening 324 is in communication with the blade 120 and the second guiding component 240, allowing the airflow from the blade 120 to pass through the second guiding component 240.
In some embodiments, the first controlling component 320 and the second controlling component 340 can be circular in shape. In one embodiment, the first controlling component 320 is rotatable. In other embodiments, the second controlling component 340 can be rotatable. In some embodiments, the airflow controlling assembly 300 can further comprise a controlling motor 360. The first controlling component 320 is driven by the controlling motor 360 to move relative to the second controlling component 340. The second controlling component 340 is fixed on the second guiding component 240. Further, in an embodiment, the second controlling component 340 can comprise a first baffle 342 corresponding to the first opening 322 and a second baffle 344 corresponding to the second opening 324.
Referring to FIG. 10 , the housing 400 accommodating the airflow generating assembly 100, the airflow guiding assembly 200 and the airflow controlling assembly 300. The housing 400 comprises a curved airflow guiding structure 401 between the first circular vent 222 and the second circular vent 242. In an embodiment, the housing 400 comprises a first shell 420, a middle shell 440 and a second shell 460, wherein the first shell 420, the middle shell 440, and the second shell 460 are connected in sequence. The first guiding component 220 is fixed on the first shell 420. The curved airflow guiding structure 401 is a curved surface of the middle shell 440. The second shell 460 is provided with an air inlet 462.
Due to the curved airflow guiding structure 401 between the first circular vent 222 and the second circular vent 242, the Coanda Effect can be generated, resulting in airflow redirection and attachment to the curved surface. Air from the first circular vent 222 and the second circular vent 242 flows along exterior curvature to converge into joint directional airflow. The airflow controlling assembly 300 can independently regulate the airflow volume entering the first guiding component 220 and the second guiding component 240, thereby controlling the airflow output from the first circular vent 222 and the second circular vent 242, and consequently adjusting the final airflow direction. In one embodiment, airflow directions of the first circular vent 222 and the second circular vent 242 are perpendicular to each other. The airflow direction of the first circular vent 222 can be downward, and the airflow direction of the second circular can be horizontal.
Referring to FIG. 11 , when there is airflow only from the first circular vent 222 and the second circular vent 242 does not emit or emits a minimal amount of airflow, the direction of outlet airflow is downward, which is in a direct airflow mode. Referring to FIG. 12 , when there is airflow from the second circular vent 242 and the first circular vent 222 does not emit or emits a minimal amount of airflow, the direction of outlet airflow is distributed around, which is in a circulating airflow mode. Referring to FIG. 13 , when the amounts of airflow from first circular vent 222 and second circular vent 242 are similar or nearly equal, the direction of outlet airflow is at a 45° angle. By controlling the airflow from the first circular vent 222 and the second circular vent 242, the bladeless ceiling fan 10 can direct the airflow towards any desired angle. Furthermore, the bladeless ceiling fan 10 can continuously emit airflow without interruption while adjusting the direction of outlet airflow.
In some embodiments, the bladeless ceiling fan 10 also can be used to purify indoor air. Referring to FIGS. 2 and 3 , the bladeless ceiling fan 10 can further comprise an air filter 500. The air filter 500 can be fixed in the center of the second shell 460. In an embodiment, the air filter 500 can be a HEPA filter. In one embodiment, the bladeless ceiling fan 10 can further comprise sensors 600 to monitor pollutants and allergens.
In some embodiments, the bladeless ceiling fan 10 also can be a smart home device. The bladeless ceiling fan 10 can further comprise a communication chip for remote control of the fan motor 140 and the airflow controlling assembly 300 to adjust speed and airflow direction. Combined with AI-controlled airflow velocity variation from air vents, the bladeless ceiling fan 10 can achieve a seamless air-sweeping effect throughout the entire airflow ring. This results in efficient and optimal circulation of indoor air and distribution of thermal energy.
The bladeless ceiling fan 10 can be equipped for smart home and IoT. It is a hub that communicates with air-conditioners, analyses and intelligently adapts to indoor environmental data. By utilizing machine learning, the bladeless ceiling fan 10 can create thermal comfort profile. Integrated AI algorithm collectively controls airflow speed, direction and air-conditioners through infrared, radiofrequency, wi-fi and Bluetooth to achieve the desired temperature and humidity at optimal human thermal comfort level while reducing energy consumption by up to 20%, allowing users full control of their environment anytime, anywhere.
The technical features in the foregoing embodiments may be randomly combined. For concise description, not all possible combinations of the technical features in the embodiment are described. However, provided that combinations of the technical features do not conflict with each other, the combinations of the technical features are considered as falling within the scope recorded in this specification.
The foregoing embodiments only describe several implementations of the disclosure, which are described specifically and in detail, and therefore cannot be construed as a limitation to the patent scope of the disclosure. It should be noted that, a person of ordinary skill in the art may further make variations and improvements without departing from the ideas of the disclosure, which all fall within the protection scope of the disclosure. Therefore, the protection scope of the disclosure is subject to the protection scope of the appended claims.

Claims

What is claimed is:

1. A bladeless ceiling fan, comprising:

a housing formed with a first circular vent and a second circular vent, wherein a curved airflow guiding structure is arranged between the first circular vent and the second circular vent;

an airflow generating assembly disposed within the housing, the airflow generating assembly comprises a blade and a fan motor driving the blade to generate airflow; and

a flow-diverting mechanism disposed within the housing, the flow-diverting mechanism is configured to distribute an airflow generated by the blade to the first circular vent and the second circular vent, and to control airflow volume entering the first circular vent and the second circular vent, respectively.

2. The bladeless ceiling fan of claim 1, wherein the flow-diverting mechanism comprises an airflow guiding assembly and an airflow controlling assembly;

the airflow guiding assembly surrounds the blade; the airflow guiding assembly comprises a first guiding component and a second guiding component; the first circular vent is arranged at an edge of the first guiding component, and the second circular vent is arranged at an edge of the second guiding component;

the airflow controlling assembly comprises a first controlling component and a second controlling component; the first controlling component is provided with a first opening and a second opening;

wherein the first controlling component and the second controlling component are configured to move relative to each other to open or close the first opening and the second opening; the first opening is in communication with the blade and the first guiding component, allowing the airflow from the blade to pass through the first guiding component; the second opening is in communication with the blade and the second guiding component, allowing the airflow from the blade to pass through the second guiding component.

3. The bladeless ceiling fan of claim 2, wherein the first guiding component comprises a plurality of evenly distributed first guiding plates; adjacent first guiding plates form a first airflow passage;

the first airflow passage has a curved shape to reduce air resistance; and/or

the second guiding component comprises a plurality of evenly distributed second guiding plates;

adjacent second guiding plates form a second airflow passage; the second airflow passage has a curved shape to reduce air resistance.

4. The bladeless ceiling fan of claim 2, wherein the first controlling component and the second controlling component are circular in shape; the first controlling component is rotatable.

5. The bladeless ceiling fan of claim 4, wherein the airflow controlling assembly further comprises a controlling motor; the first controlling component is driven by the controlling motor to move relative to the second controlling component; the second controlling component is fixed on the second guiding component.

6. The bladeless ceiling fan of claim 4, wherein the second controlling component comprises a first baffle corresponding to the first opening and a second baffle corresponding to the second opening.

7. The bladeless ceiling fan of claim 2, wherein the housing comprises a first shell, a middle shell and a second shell, wherein the first shell, the middle shell, and the second shell are connected in sequence; the first guiding component is fixed on the first shell; the curved airflow guiding structure is a curved surface of the middle shell; the second shell is provided with an air inlet.

8. The bladeless ceiling fan of claim 7, further comprising an air filter, the air filter is fixed in a center of the second shell.

9. The bladeless ceiling fan of claim 8, further comprising sensors to monitor pollutants and allergens.

10. The bladeless ceiling fan of claim 1, further comprising a communication chip for remote control of the fan motor and the airflow controlling assembly to adjust speed and airflow direction.