TWM600349U - Bladeless ceiling fan capable of adjusting airflow field pattern - Google Patents

Abstract

A leafless ceiling fan with adjustable airflow field type includes an airflow generating component, a first airflow guide, a second airflow guide, an air volume control component, an outer ring structure and an inner ring structure. The airflow generating component is used to generate an airflow, and the airflow flows into the first airflow guide and the second airflow guide to respectively form an outer ring airflow and an inner ring airflow. The air volume control component is used to adjust the flow rate of at least one of the outer ring airflow and the inner ring airflow. The outer ring airflow will flow into the outer ring structure, and form an outer ring-shaped axial airflow output from the outer ring structure. The inner ring airflow will flow into the inner ring structure and form an inner ring-shaped axial airflow output from the inner ring structure. When the flow rate of the outer ring airflow is greater than that of the inner ring airflow, a concentrated airflow is formed. On the contrary, a divergent air flow is formed.

Description

Leafless ceiling fan with adjustable airflow field

This creation is about a fanless fan, especially a fanless ceiling fan with adjustable airflow field.

In Taiwan's humid and hot climate, electric fans are a must-have household appliance for every family. The electric fan is used to generate an air flow. In hot weather, the air flow can make the user feel cool, and in humid weather, the air flow can be used to dry wet clothes.

The electric fan in the prior art generally has a plurality of blades. When the electric fan is running, the blades will rotate to generate airflow, and noise will also be accompanied. Moreover, the electric fan is generally a centrifugal fan, and the flow field of the airflow generated by the fan blade is relatively unstable and cannot be adjusted. Generally, an electric fan that can generate a stronger wind speed has a greater noise during operation. For example, an industrial fan generates much more noise than a general household fan.

The general electric fan will have a certain volume, especially the electric fan that can generate the stronger wind speed, the larger the volume will usually be. In today's society where the price per square meter of the house continues to rise, it will waste the space utilization in the home. In addition, the blades of electric fans are also likely to cause danger to children in the home.

The ceiling fan in the prior art is hung from a ceiling, which can avoid wasting the space utilization in the home. However, the ceiling fan is still a centrifugal fan with multiple blades, and the flow field is unstable and cannot be adjusted like an electric fan. Fields, noise generation and other issues.

In addition, the material of the fan blade is generally plastic, which will rub against the air when rotating, which will increase static electricity and easily cause dust to adhere. Therefore, it is often necessary to disassemble the fan blade for cleaning to keep the fan blade clean and avoid the fan blade. The resulting air flow is mixed with dust.

In view of the problems in the prior art, the flow field of the air flow generated by the blades of the electric fan and the ceiling fan is relatively unstable, the flow field cannot be adjusted, accompanied by noise and easy dust adhesion. One of the main purposes of this creation is to provide a ceiling fan without fan blades to solve at least one problem in the prior art.

This creation is to solve the problems of the prior art. The necessary technical means adopted are to provide a leafless ceiling fan with adjustable airflow field type, which is hung on a ceiling and includes an airflow generating component, a first airflow guide, A second air flow guide, an air volume control component, an outer ring structure and an inner ring structure.

The air flow generating component is used for generating an air flow in an air flow generating space. The first airflow guide is provided with an outer ring airflow channel communicating with the airflow generating space, and a first air inlet is provided between the outer ring airflow channel and the airflow generating space, so that the airflow flows into the outer ring through the first air inlet The air flow channel forms an outer ring air flow. The second airflow guide is provided with an inner ring airflow channel communicating with the airflow generating space, and a second air inlet is provided between the inner ring airflow channel and the airflow generating space, so that airflow flows into the interior through the second air inlet The annular air flow channel forms an inner annular air flow.

The air volume control component is movably arranged adjacent to the first air inlet and the second air inlet, and is used to adjust at least one of a first shielding rate for shielding the first air inlet and a second shielding rate for shielding the second air inlet One is to adjust the flow rate of at least one of the outer ring airflow and the inner ring airflow. The outer ring structure is connected to the first airflow guide, and an outer ring channel communicating with the outer ring airflow channel is opened, so that the outer ring airflow produces a flow increasing effect in the outer ring channel to output an outer ring-shaped axial airflow. The inner ring structure is connected to the second air flow guide, and an inner ring channel communicating with the inner ring air channel is opened, so that the inner ring airflow produces an increase effect on the inner ring channel to output an inner ring axial airflow.

Wherein, when the air volume adjusting component is moved to make the flow rate of the outer ring air flow greater than the flow rate of the inner ring air flow, the local outer annular axial air flow and the inner annular axial air flow converge into a concentrated air flow; When the air volume control component makes the flow rate of the outer ring air flow smaller than the flow rate of the inner ring air flow, the outer annular axial air flow and the local inner annular axial air flow converge into a divergent air flow.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is the air flow generating component in the leafless ceiling fan with adjustable air flow field type, including a centrifugal fan, and the centrifugal fan is used to generate air flow.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is to make the air flow generating component in the leafless ceiling fan with adjustable air flow field type, including a DC motor, and the DC motor is connected to the centrifugal fan. Used to drive the centrifugal fan to rotate to generate airflow.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is the air volume control component in the leafless ceiling fan that can adjust the airflow pattern, including a baffle, and the baffle is used to adjust the first shield At least one of the rate and the second occlusion rate.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is to make the air volume control component in the leafless ceiling fan with adjustable airflow field type, and further include a stepping motor, and the stepping motor is connected to the baffle. Used to drive the baffle to move to adjust at least one of the first shielding rate and the second shielding rate.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from this creation is a leafless ceiling fan with adjustable airflow field type, which further includes a connecting element, and the connecting element is used to connect the ceiling.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from this creation is the leafless ceiling fan with adjustable airflow field type, which further includes a light-emitting element, and the light-emitting element is used to generate a light source.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is to make the outer ring structure of the leafless ceiling fan with adjustable airflow field type. The ring is provided with an outer ring air outlet, and the outer ring air outlet is Used to output the outer annular axial airflow.

On the basis of the above-mentioned necessary technical means, one of the subsidiary technical means derived from this creation is to make the inner ring structure of the leafless ceiling fan with adjustable airflow field type, the ring is provided with an inner ring air outlet, and the inner ring air outlet is Used to output the inner annular axial airflow.

Based on the above, this creation provides a leafless ceiling fan that can adjust the airflow field type. The airflow generation component and the air volume control component are used to adjust the flow rate of at least one of the outer ring airflow and the inner ring airflow, thereby adjusting the outer ring structure The output outer annular axial airflow and the inner annular axial airflow output from the inner ring structure form one of a concentrated airflow and a divergent airflow to achieve the effect of adjusting the airflow pattern.

Please refer to the first and second figures. The first figure shows the three-dimensional exploded view of the leafless ceiling fan with adjustable airflow field provided by the preferred embodiment of this creation; and the second figure shows the comparison of this creation The three-dimensional assembly diagram of the leafless ceiling fan with adjustable airflow field type provided by the preferred embodiment. As shown in the figure, a leafless ceiling fan 1 with adjustable airflow field type is hung on a ceiling (not shown in the figure), and includes an airflow generating assembly 11, a first airflow guide 12, and a second The air flow guide 13, an air volume control assembly 14, an outer ring structure 15 and an inner ring structure 16.

The airflow generating assembly 11 includes a centrifugal fan 111 and a DC motor 112, and has an airflow generating space S (marked in the third figure). The DC motor 112 is connected to the centrifugal fan 111 to drive the centrifugal fan 111 to rotate during operation. The first airflow guide 12 is provided with an outer ring airflow channel T12 (marked in the third figure), the outer ring airflow channel T12 is connected to the airflow generating space S, and there is a gap between the outer ring airflow channel T12 and the airflow generating space S A first air inlet IN12 (marked in the third picture). The second airflow guide 13 defines an inner ring airflow channel T13 (marked in the third figure), the inner ring airflow channel T13 is connected to the airflow generating space S, and there is a gap between the inner ring airflow channel T13 and the airflow generating space S A second air inlet IN13 (marked in the third picture).

The air volume control assembly 14 is movably disposed adjacent to the first air inlet IN12 and the second air inlet IN13, and includes a baffle 141 and a stepping motor 142. The stepping motor 142 is connected to the baffle 141 to drive the baffle 141 to move during operation.

The outer ring structure 15 is connected to the first air flow guide 12 and defines an outer ring channel T15 (marked in the fourth figure), wherein the outer ring channel T15 is connected to the outer ring air channel T12. The inner ring structure 16 is connected to the second air guide 13 and defines an inner ring channel T16 (marked in the fourth figure), wherein the inner ring channel T16 is connected to the inner ring air channel T13. In practice, the first air guide 12 will also be connected to the inner ring structure 16, and the second air guide 13 will also be connected to the outer ring structure 15, thereby enhancing the structural strength of this embodiment.

In this embodiment, the leafless ceiling fan 1 with adjustable airflow field type further includes a connecting element 17 and a light emitting element 18. The connecting element 17 is used to connect a ceiling (not shown in the figure), so that the leafless ceiling fan 1 with adjustable airflow field type can be hung in the air without occupying the floor space, so the space utilization rate of the house can be increased . The light-emitting element 18 is used to generate a light source, and can be a fluorescent lamp, a tungsten bulb, a light-emitting diode (LED), or other light-emitting elements. Since the leafless ceiling fan 1 with adjustable airflow field is hung from the ceiling, the light-emitting element 18 can provide a light source, so that the function of the leafless ceiling fan 1 with adjustable airflow field is more diverse.

Then, please refer to Figures 1 to 5 together. Figure 3 is a cross-sectional view of A─A showing an application example of Figure 2; Figure 4 is a partial cross-sectional view of B-B of Figure 3 ; And, the fifth figure is a C-C cross-sectional view showing an application example of the second figure. As shown in the figure, the airflow generating assembly 11 generates an airflow F in the airflow generating space S.

In this embodiment, the DC motor 112 in the airflow generating assembly 11 is connected to the centrifugal fan 111 in the airflow generating assembly 11, and when the DC motor 112 is running, the centrifugal fan 111 is driven to rotate, thereby generating the airflow F. The outer ring airflow channel T12 opened by the first airflow guide 12 and the inner ring airflow channel T13 opened by the second airflow guide 13 are connected to the airflow generating space S. Therefore, the airflow F flows into the outer ring from the airflow generating space S The air flow channel T12 and the inner ring air flow channel T13.

A first air inlet IN12 is formed between the outer ring airflow passage T12 and the airflow generating space S, and a second air inlet IN13 is formed between the inner ring airflow channel T13 and the airflow generating space S. After the airflow F flows into the outer ring airflow channel T12 through the first air inlet IN12, an outer ring airflow Fa is formed, and after flowing into the inner ring airflow channel T13 via the second air inlet IN13, an inner ring airflow Fb is formed.

The air volume control assembly 14 is movably disposed adjacent to the first air inlet IN12 and the second air inlet IN13. In this embodiment, it includes a baffle 141 and a stepping motor 142. The stepping motor 142 is connected to the baffle 141, and is operated to drive the baffle 141, so that the baffle 141 can move a specific angle or a specific scale to adjust a first shielding rate or a shielding of the first air inlet IN12 The second blocking rate of the second air inlet IN13 is used to adjust the flow rate of the outer ring airflow Fa or the flow rate of the inner ring airflow Fb. To put it simply, the baffle 141 is used to block the first air inlet IN12 or the second air inlet IN13. The more the air inlets (the first air inlet IN12 and the second air inlet IN13) are blocked, the amount of air flow F flows in There will be less, and the less the air inlet is blocked, the more airflow F will flow in.

As shown in the third to fifth figures, the baffle 141 does not block the first air inlet IN12, but blocks the second air inlet IN13, so that the first blocking rate is smaller than the second blocking rate, and therefore, the airflow F flows into the first The flow rate of one air inlet IN12 is greater than that of the second air inlet IN13, so the flow rate of the outer ring airflow Fa is greater than the flow rate of the inner ring airflow Fb. In the third figure, the length and amount of arrows are used to indicate the flow rates of the outer ring air flow Fa and the inner ring air flow Fb.

The outer ring airflow Fa will flow into the outer ring channel T15 of the outer ring structure 15 through the outer ring airflow channel T12, and continue to rotate in the outer ring channel T15, so that the outer ring airflow Fa has a flow increasing effect, and from one of the outer ring structures 15 The annular air outlet OUT15 outputs an outer annular axial airflow FA. In practice, the flow increasing effect can increase the outer ring airflow Fa by 15 times. In the same way, the inner ring airflow Fb will flow into the inner ring channel T16 of the inner ring structure 16 through the inner ring airflow channel T13, and the inner ring channel T16 produces a flow increasing effect, and is output from the inner ring air outlet OUT16 of the inner ring channel T16 An inner annular axial airflow FB.

Due to the practical structural strength requirements, although the first airflow guide 12 is connected to the inner ring structure 16, the outer ring airflow channel T12 is not connected with the inner ring channel T16, so the outer ring airflow Fa will not flow into the inner ring Channel T16. Similarly, although the second airflow guide 13 is connected to the outer ring structure 15, the inner ring airflow channel T13 is not connected to the outer ring channel T15, so the inner ring airflow Fb will not flow into the outer ring channel T15.

It should be noted here that because the outer ring structure 15 is in a circular ring shape, the outer ring air outlet OUT15 is opened on the outer ring structure 15 and is also in a circular ring shape, and the outer ring-shaped axial air flow FA exits from the outer ring. The tuyere OUT15 outputs, so the outer ring-shaped axial airflow FA will also have a circular ring shape. In addition, the flow direction of the outer annular axial airflow FA will be parallel to one of the central axis X of the leafless ceiling fan 1 with adjustable airflow field type. Therefore, the air flow output from the outer ring air outlet OUT15 is named the outer ring axial air flow FA. In the same way, the inner annular axial air flow FB is also the same, so it will not be repeated.

The outer ring air flow FA is formed by the outer ring air flow Fa, and the inner ring air flow FB is formed by the inner ring air flow Fb. When the flow rates of the outer ring air flow Fa and the inner ring air flow Fb are equal, the flow rates of the outer ring-shaped axial air flow FA and the inner ring-shaped axial air flow FB will also be equal, so neither airflow will flow to the other airflow. From the user’s point of view, the air flow felt by the user standing directly below the center of the leafless ceiling fan 1 with adjustable airflow field type (can be regarded as the central axis X) is not as good as standing on the outer ring structure 15 or inside The ring structure 16 is strong below. The user can still feel part of the air flow while standing directly below the center of the leafless ceiling fan 1 of the adjustable air flow field type, because of the normal diffusion of the air flow.

As shown in the third and fourth figures, the flow rate of the outer ring air flow Fa will be greater than the flow rate of the inner ring air flow Fb, so the flow rate of the outer annular axial air flow FA will also be greater than that of the inner annular axial air flow FB. The flow rate, that is, the wind speed of the outer annular axial air flow FA is stronger than the wind speed of the inner annular axial air flow FB. Therefore, part of the outer annular axial airflow FA will blow toward the inner annular axial airflow FB, and converge into a concentrated airflow, that is, the first area A1 in the figure, as shown in the fifth figure. Because the speed difference between the wind speed of the outer annular axial air flow FA and the wind speed of the inner annular axial air flow FB causes the overall pressure difference, and then changes the flow field, making the air flow to the bladeless ceiling fan 1 with adjustable air flow field. Directly below the center converges to form a concentrated airflow.

Due to the limited space of the diagram, in order to express the technical characteristics of the confluence, the airflow directions of the outer annular axial airflow FA and the inner annular axial airflow FB in the fifth figure may be exaggerated, which are only for illustration and do not represent the actual airflow. The direction will be as shown in the figure, hereby explain.

Finally, please refer to the first, second, and sixth to eighth diagrams. Among them, the sixth diagram is a cross-sectional view of A-A of another application example of the second diagram; the seventh diagram is the Figure 6 is a partial cross-sectional view of D-D; and, Figure 8 is a C-C cross-sectional view showing another application example of Figure 2. As shown in the figure, the air flow generating assembly 11 generates an air flow F in the air flow generating space S.

The baffle 141 is driven and adjusted by the stepping motor 142, so that the baffle 141 does not block the second air inlet IN13, but blocks the first air inlet IN12 of the part, so that the second blocking rate is less than the first blocking rate. Therefore, the airflow The flow rate of F flowing into the second air inlet IN13 is greater than that of the first air inlet IN12, so the flow rate of the inner ring airflow Fb is greater than the flow rate of the outer ring airflow Fa. In the sixth figure, the length and amount of arrows are used to indicate the flow rates of the inner ring air flow Fb and the outer ring air flow Fa.

The outer ring airflow Fa will flow into the outer ring channel T15 of the outer ring structure 15 through the outer ring airflow channel T12, and produce a flow increasing effect in the outer ring channel T15, and the outer ring shaft is output from the outer ring air outlet OUT15 of the outer ring structure 15 To the airflow FA. In the same way, the inner ring air flow Fb will flow into the inner ring channel T16 of the inner ring structure 16 through the inner ring air channel T13, and the inner ring channel T16 will produce a flow increasing effect, and the inner ring air outlet OUT16 of the inner ring channel T16 will output the inner ring. Annular axial airflow FB. The inner annular axial airflow FB and the outer annular axial airflow FA have been described in the previous paragraphs, so they will not be repeated.

As shown in Figures 6 and 7, the flow rate of the inner ring airflow Fb will be greater than the flow rate of the outer ring airflow Fa, so the flow rate of the inner annular axial airflow FB will also be greater than that of the outer annular axial airflow FA. The flow rate, that is, the wind speed of the inner annular axial air flow FB will be stronger than the wind speed of the outer annular axial air flow FA. Therefore, part of the inner annular axial airflow FB will flow toward the outward annular axial airflow FA, and converge into a divergent airflow, that is, a second area A2 in the figure, as shown in the eighth figure. Because the speed difference between the wind speed of the outer annular axial air flow FA and the wind speed of the inner annular axial air flow FB causes the overall pressure difference, and then changes the flow field, making the air flow to the bladeless ceiling fan 1 with adjustable air flow field. The outside converges to form a divergent airflow.

Due to the limited space of the diagram, in order to express the technical characteristics of divergence, the airflow directions of the outer annular axial airflow FA and the inner annular axial airflow FB in the eighth figure may be exaggerated, which are only for illustration and do not represent the actual airflow. The direction will be as shown in the figure, hereby explain.

Concentrated airflow and divergent airflow are compared. The concentrated airflow is centered on the central axis X and is concentrated from the outer ring structure 15 to the inner ring structure 16, while the divergent airflow is centered on the central axis X from the inner ring structure 16 to the outer ring. Structure 15 diverges. Seen from the cross section of the vertical central axis X, the concentrated airflow is concentrated on the central axis X, so the blowing range is a circle, while the divergent airflow diverges from the inner ring structure 16 to the outer ring structure 15, so it blows The range is a hollow circle (similar to a doughnut). It should be noted that the above blowing range refers to the range blown by the main airflow. Below the leafless ceiling fan 1 with adjustable airflow field and outside the blowing range, a small part of the airflow can still be felt. This is normal airflow. Diffusion phenomenon.

In summary, the bladeless ceiling fan with adjustable airflow field provided by this creation can adjust the outer annular axial airflow output by the outer ring structure and the inner ring structure output by the combination of the airflow generating component and the air volume control component The inner ring-shaped axial air flow, and then achieve the effect of adjusting the air flow field.

Compared with the electric fan in the prior art, this creation can be hung from the ceiling without occupying the floor space, thereby increasing the space utilization of the house. Compared with the electric fan or ceiling fan in the prior art, this creation can adjust the outer annular axial airflow output by the outer ring structure and the inner annular axial airflow output by the inner ring structure through the airflow generating component and the air volume control component. , To achieve the effect of adjusting the airflow field pattern that cannot be achieved by the prior art, and because there is no fan blade, the noise generation can be reduced, and there will be no problems caused by the fan blades attracting dust due to static electricity.

Based on the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the creation can be described more clearly, and the scope of the creation is not limited by the preferred embodiments disclosed above. On the contrary, its purpose is to cover various changes and equivalent arrangements within the scope of the patent application for this creation.

1: Leafless ceiling fan with adjustable airflow field 11: Airflow generating components 111: Centrifugal fan 112: DC motor 12: The first air guide 13: The second air guide 14: Air volume control components 141: Baffle 142: stepping motor 15: Outer ring structure 16: inner ring structure 17: Link components 18: Light-emitting element A1: The first area A2: The second area F: Airflow Fa: Outer ring airflow Fb: inner ring airflow FA: Outer annular axial air flow FB: inner annular axial air flow IN12: the first air inlet IN13: second air inlet OUT15: Outer ring air outlet OUT16: Inner ring air outlet S: Airflow creates space T12: Outer ring air flow channel T13: Inner ring air flow channel T15: Outer ring channel T16: Inner ring channel X: central axis

The first figure is a three-dimensional exploded view of the leafless ceiling fan with adjustable airflow pattern provided by the preferred embodiment of this creation; The second figure is a three-dimensional assembly diagram of the leafless ceiling fan with adjustable airflow pattern provided by the preferred embodiment of this creation; The third figure is an A-A cross-sectional view showing an application example of the second figure; The fourth figure is a partial cross-sectional view showing B─B of the third figure; The fifth figure is a C-C cross-sectional view showing an application example of the second figure; The sixth figure is an A-A cross-sectional view showing another application example of the second figure; The seventh figure shows the D-D partial cross-sectional view of the sixth figure; and The eighth figure is a C-C cross-sectional view showing another application example of the second figure.

1: Leafless ceiling fan with adjustable airflow field

11: Airflow generating components

111: Centrifugal fan

112: DC motor

12: The first air guide

13: The second air guide

14: Air volume control components

141: Baffle

142: stepping motor

15: Outer ring structure

16: inner ring structure

17: Link components

18: Light-emitting element

Claims (9)

A leafless ceiling fan with adjustable airflow field type, hung on a ceiling, and contains: An airflow generating component for generating an airflow in an airflow generating space; A first airflow guide is provided with an outer ring airflow channel communicating with the airflow generating space, and a first air inlet is provided between the outer ring airflow channel and the airflow generating space, so that the airflow passes through the The first air inlet flows into the outer ring air flow channel to form an outer ring air flow; A second airflow guide member is provided with an inner ring airflow channel communicating with the airflow generating space, and a second air inlet is provided between the inner ring airflow channel and the airflow generating space, so that the airflow passes through the The second air inlet flows into the inner ring air flow channel to form an inner ring air flow; An air volume control component is movably arranged adjacent to the first air inlet and the second air inlet, and is used to adjust a first shielding rate for shielding the first air inlet and a first shielding rate for shielding the second air inlet At least one of the two blocking rates, so as to adjust the flow rate of at least one of the outer ring airflow and the inner ring airflow; An outer ring structure is connected to the first airflow guide, and an outer ring channel connected to the outer ring air channel is opened, so that the outer ring airflow produces a flow increasing effect in the outer ring channel to output an outer ring Axial airflow; and An inner ring structure is connected to the second airflow guide, and an inner ring channel connected to the inner ring air channel is opened, so that the inner ring airflow produces a flow increasing effect in the inner ring channel to output an inner ring形axial airflow; Wherein, when the air volume control assembly is moved and adjusted so that the flow rate of the outer ring airflow is greater than the flow rate of the inner ring airflow, the local outer annular axial airflow and the inner annular axial airflow converge into a concentrated type Air flow; when the air volume control assembly is moved and adjusted so that the flow rate of the outer ring air flow is less than the flow rate of the inner ring air flow, the outer annular axial air flow and the partial inner annular axial air flow converge into a divergent type airflow. The leafless ceiling fan with adjustable airflow field type according to claim 1, wherein the airflow generating component includes a centrifugal fan, and the centrifugal fan is used to generate the airflow. The leafless ceiling fan with adjustable airflow field type according to claim 2, wherein the airflow generating assembly further includes a direct current motor, and the direct current motor is connected to the centrifugal fan to drive the centrifugal fan to rotate to generate the airflow . The leafless ceiling fan with adjustable airflow field type according to claim 1, wherein the air volume control assembly includes a baffle, and the baffle is used to adjust at least one of the first blocking rate and the second blocking rate One. The leafless ceiling fan with adjustable airflow field type according to claim 4, wherein the air volume control assembly further includes a stepping motor, and the stepping motor is connected to the baffle to drive the baffle to move to adjust the At least one of the first occlusion rate and the second occlusion rate. The leafless ceiling fan with adjustable airflow pattern as described in claim 1, further includes a connecting element, and the connecting element is used to connect the ceiling. The leafless ceiling fan with adjustable airflow field type as described in claim 1, further includes a light-emitting element, and the light-emitting element is used to generate a light source. The leafless ceiling fan with adjustable airflow field type according to claim 1, wherein the outer ring structure is provided with an outer ring air outlet, and the outer ring air outlet is used to output the outer annular axial airflow. The leafless ceiling fan with adjustable airflow field type according to claim 1, wherein the inner ring structure is provided with an inner ring air outlet, and the inner ring air outlet is used to output the inner ring axial airflow.

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