Bladeless fan lamp

Abstract

The application discloses a bladeless fan lamp and relates to the technical field of blowing equipment. The bladeless fan lamp comprises a first air shell, a second air shell and an air wheel, a wind cavity is formed between the first air shell and the second air shell, and the air wheel is located in the wind cavity; the wind cavity comprises an annular air duct formed between an inner surface of the first air shell, an outer surface of the second air shell and an airflow outlet of the air wheel, and an air outlet of the annular air duct is opposite to the airflow outlet; wherein the inner surface of the first air shell and the outer surface of the second air shell are both inwardly gathered at the air outlet, the inner surface of the first air shell has a first inward inclination angle alpha at the air outlet, the outer surface of the second air shell has a second inward inclination angle beta at the air outlet, and alpha is less than beta. The bladeless fan lamp disclosed by the application can increase the air outlet range.

Description

Technical Field

[0001] This application relates to the field of air blowing equipment technology, specifically to a bladeless fan light. Background Technology

[0002] Bladeless ceiling fan lights are electrical devices that integrate the air blowing function of a ceiling fan with the lighting function of a lamp. They are highly practical and economical, and have attracted widespread attention.

[0003] In related technologies, the air outlet of bladeless fan lights is usually arranged around the lampshade, and the air outlet direction is generally vertically downward or obliquely outward. However, tests have shown that vertically downward airflow results in a small airflow range, while oblique outward airflow leads to a significant reduction in air pressure, and may even result in no airflow in the middle area. Therefore, neither of these two methods can adequately meet user needs. Summary of the Invention

[0004] In view of this, this application provides a bladeless fan light that can increase the air delivery range.

[0005] The specific technical solution adopted in this application is as follows:

[0006] This application provides a bladeless fan light, which includes a first wind housing, a second wind housing, and a wind wheel. A wind cavity is formed between the first wind housing and the second wind housing, and the wind wheel is located inside the wind cavity.

[0007] The air cavity includes an annular air duct formed between the inner surface of the first air shell, the outer surface of the second air shell, and the airflow outlet of the impeller, with the air outlet of the annular air duct opposite to the airflow outlet.

[0008] The inner surface of the first air casing and the outer surface of the second air casing both converge inward at the air outlet. The inner surface of the first air casing has a first inward inclination angle α at the air outlet, and the outer surface of the second air casing has a second inward inclination angle β at the air outlet, where α≤β, and the inclination angle is the angle with the vertical direction.

[0009] Optionally, the difference between the second inclination angle β and the first inclination angle α satisfies the following condition:

[0010] 0≤β-α≤5°.

[0011] Optionally, 5° ≤ α ≤ 45°; and / or, β ≤ 50°.

[0012] Alternatively, 10° ≤ α ≤ 25°, and / or β ≤ 30°.

[0013] Optionally, the annular duct is provided with multiple sets of guide elements that are asymmetrically distributed along the circumference of the wind turbine;

[0014] Each of the guide elements has at least one guide surface, the angle between the guide direction of the guide surface and the flow direction of the airflow generated by the wind turbine is less than 90°, wherein the guide direction is from the side of the guide surface near the wind turbine to the side of the guide surface away from the wind turbine.

[0015] Optionally, the number of the multiple sets of flow guides is odd.

[0016] Optionally, the multiple sets of guide members are arranged at non-equidistant intervals in the circumferential direction of the wind turbine, wherein each set of guide members can guide the airflow within its arrangement range; and / or,

[0017] At least two sets of the aforementioned flow guides differ in at least one aspect of the number, style, and arrangement of the flow guides included.

[0018] Optionally, the outer surface of the second wind casing includes a side surface and a bottom surface, the side surface being located inside the first wind casing, and the bottom surface being connected to the side surface and located on the side of the air outlet away from the impeller;

[0019] The bottom surface is curved, and from the edge of the bottom surface to the center of the bottom surface, the bottom surface gradually moves away from the air outlet in the vertical direction, and the inclination angle of the bottom surface gradually increases. The vertical direction is parallel to the extension direction of the central axis of the impeller.

[0020] Optionally, along the vertical direction, there is a first distance H between the center of the bottom surface of the second air casing and the air outlet, the first distance H satisfying the following condition:

[0021] 0.05×R≤H≤0.5×R

[0022] Wherein, R is the outer diameter of the air outlet of the annular air duct.

[0023] Optionally, the first distance H satisfies the following condition: 0.25×R≤H≤0.35×R.

[0024] Optionally, the bottom surface of the second air casing includes an edge region and a transition region connected radially along the air outlet, the edge region being connected to the side surface, and the transition region being located between the center of the edge region and the bottom surface;

[0025] The curvature of the edge region is greater than that of the transition region.

[0026] Optionally, the bottom surface of the second wind shell has a third inclination angle γ at a designated location, where 10°≤γ≤60°;

[0027] The designated position is a position located radially from the center of the bottom surface along the air outlet, with a second distance L, where L = 2 / 3 × R, and R is the outer diameter of the air outlet of the annular air duct.

[0028] Optionally, the third inclination angle γ satisfies: 40°≤γ≤55°.

[0029] The bladeless fan light provided in this application embodiment forms an annular air duct between the inner surface of the first air casing and the outer surface of the second air casing. The airflow generated by the rotation of the impeller is blown into the environment through the air outlet of the annular air duct. Since the inner surface of the first air casing and the outer surface of the second air casing both converge inwards at the air outlet, and the first inward inclination angle of the inner surface of the first air casing at the air outlet is less than or equal to the second inward inclination angle of the outer surface of the second air casing at the air outlet, the airflow generated by the impeller is roughly divided into two airflows that both converge inwards but have different directions or positions at the air outlet. These two airflows influence each other and deflect after being blown out, thereby increasing the air delivery range. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an exploded view of a bladeless fan light provided in an embodiment of this application;

[0032] Figure 2 This is a side view of a bladeless fan light provided in an embodiment of this application;

[0033] Figure 3 It is along Figure 2 The first sectional view obtained by cutting along line AA in the middle;

[0034] Figure 4 This is a schematic diagram of the installation of the wind turbine in the wind cavity according to an embodiment of this application;

[0035] Figure 5 It is along Figure 2 A cross-sectional view obtained by cutting along the middle BB line;

[0036] Figure 6 This is a schematic diagram showing the distribution of five sets of air guides in the annular air duct in the bladeless fan light provided in this application embodiment;

[0037] Figure 7 This is a schematic diagram of the structure of a second wind shell provided in an embodiment of this application;

[0038] Figure 8 It is along Figure 2 The second sectional view obtained by cutting along line AA in the middle;

[0039] Figure 9 This is a side view of a second wind shell provided in an embodiment of this application;

[0040] Figure 10 This is a schematic diagram illustrating the wind area simulation effect of the airflow blown by the bladeless fan light in related technologies;

[0041] Figure 11 yes Figure 10 A schematic diagram of the cross-section of the airflow area shown;

[0042] Figure 12 This is a schematic diagram illustrating the wind area simulation effect of the airflow blown by the bladeless fan light provided in the embodiments of this application;

[0043] Figure 13 yes Figure 12 A schematic diagram of the cross-section of the airflow region shown.

[0044] Figure label:

[0045] 1. First wind casing; 11. Inner surface;

[0046] 2. Second wind shell; 21. Outer surface; 211. Side surface; 212. Bottom surface; 2121. Edge region; 2122. Transition region;

[0047] 3. Wind turbine; 31. Airflow outlet;

[0048] 4. Air cavity; 41. Circular air duct; 411. Air outlet;

[0049] 5. Flow guide; 51. Flow guide surface;

[0050] 6. Suspension mechanism.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0055] This application provides a bladeless fan light, such as Figures 1 to 3 As shown, the bladeless fan light includes a first wind housing 1, a second wind housing 2, and a fan wheel 3. A wind cavity 4 is formed between the first wind housing 1 and the second wind housing 2, and the fan wheel 3 is located inside the wind cavity 4. The wind cavity 4 includes an annular air duct 41 formed between the inner surface 11 of the first wind housing 1, the outer surface 21 of the second wind housing 2, and the airflow outlet 31 of the fan wheel 3. The air outlet 411 of the annular air duct 41 is opposite to the airflow outlet 31. The inner surface 11 of the first wind housing 1 and the outer surface 21 of the second wind housing 2 both converge inward at the air outlet 411. The inner surface 11 of the first wind housing 1 has a first inward inclination angle α at the air outlet 411, and the outer surface 21 of the second wind housing 2 has a second inclination angle β at the air outlet 411, where α≤β, and the inclination angle is the angle with the vertical direction.

[0056] The bladeless fan light provided in this embodiment forms an annular air duct 41 between the inner surface 11 of the first air housing 1 and the outer surface 21 of the second air housing 2. The airflow generated by the rotation of the impeller 3 is blown out to the environment through the air outlet 411 of the annular air duct 41. Since the inner surface 11 of the first air housing 1 and the outer surface 21 of the second air housing 2 both converge inward at the air outlet 411, and the first inward inclination angle of the inner surface 11 of the first air housing 1 at the air outlet 411 is less than or equal to the second inward inclination angle of the outer surface 21 of the second air housing 2 at the air outlet 411, the airflow generated by the impeller 3 is roughly divided into two airflows that both converge inward but have different directions or positions at the air outlet 411. These two airflows will influence each other and deflect after being blown out, thereby forming a larger area of ​​airflow.

[0057] Figures 10 to 11 The image shows a simulated wind area formed after the airflow is blown out of the air outlet in a bladeless fan light with vertical downward airflow in the related technology. Figure 12 and Figure 13 The image shows a simulated wind area formed by airflow after it exits from the air outlet 411, as provided in the embodiment of this application. A comparison reveals that in the bladeless fan light provided in this embodiment, the airflow exiting from the air outlet 411 forms two airflow streams, which can cover a significantly larger air delivery range.

[0058] To make the technical solution and advantages of this application clearer, the following description and explanation, in conjunction with the accompanying drawings, further introduces and explains a bladeless fan light provided in the embodiments of this application.

[0059] like Figure 1 As shown in the figure, the bladeless fan light provided in this application embodiment includes a first fan housing 1, a suspension mechanism 6, a blower mechanism, and a lighting mechanism. The first fan housing 1 is connected to the suspension mechanism 6, which is used to suspend the bladeless fan light from the ceiling or other carrier. The blower mechanism is located inside the first fan housing 1 and includes a fan wheel 3 and a fan assembly (not shown in the figure). The fan assembly drives the fan wheel 3 to rotate, thereby generating airflow. The lighting mechanism includes a light-emitting component (not shown in the figure) and a lampshade. The light-emitting component emits illumination light, and the lampshade is located in the direction of illumination light emission. Exemplarily, the lampshade can be a hollow cavity structure, with the light-emitting component installed inside the lampshade.

[0060] In some embodiments of this application, the second housing 2 of the bladeless fan lamp may be part of the lighting mechanism, such as a lamp panel or lamp chassis in the light-emitting assembly, or, as... Figure 1 As shown, it is composed of a lampshade. Exemplarily, the second fan housing 2 can be connected to the first fan housing 1 and / or the fan assembly.

[0061] In other embodiments of this application, the second housing 2 of the bladeless fan light can also be a separate housing structure. In this case, the second housing 2 is generally located between the first housing 1 and the lighting mechanism. Exemplarily, the second housing 2 can be connected to the first housing 1 and / or the lighting mechanism.

[0062] Figure 2 The side view of the bladeless fan light is shown. Figure 3 It is along Figure 2 A cross-sectional view obtained by cutting along line AA. (See image below.) Figure 3 As shown, the first air housing 1 has an opening on both sides, with one opening for air intake and the other for air outlet. The second air housing 2 is located on the air outlet side of the first air housing 1 and is fixedly connected to the first air housing 1. A wind cavity 4 is formed between a portion of the inner surface 11 of the first air housing 1 and a portion of the outer surface 21 of the second air housing 2. The blowing mechanism is arranged in this wind cavity 4, occupying a portion of the space in the wind cavity 4; the remaining space in the wind cavity 4 is used to form an annular air duct 41. The impeller 3 has an air outlet 31, which is connected to the annular air duct 41. The airflow generated by the rotation of the impeller 3 flows from the air outlet 31 into the annular air duct 41 and is finally blown out through the air outlet 411 of the annular air duct 41. It is easy to understand that the air outlet 411 of the annular air duct 41 is annular.

[0063] In the embodiments of this application, such as Figure 3 As shown, the inner surface 11 of the first fan housing 1 converges inward at the air outlet 411, thus at the air outlet 411, the tangent direction of the inner surface 11 of the first fan housing 1 has a first inward inclination angle α between it and the vertical direction. Similarly, the outer surface 21 of the second fan housing 2 also converges inward at the air outlet 411, thus at the air outlet 411, the tangent direction of the outer surface 21 of the second fan housing 2 has a second inclination angle β between it and the vertical direction. The first inclination angle α is less than or equal to the second inclination angle β.

[0064] It should be noted that, in the embodiments of this application, the vertical direction is parallel to the extension direction of the central axis (which is also the rotation axis) of the wind turbine 3.

[0065] In some embodiments of this application, the difference between the second inclination angle β and the first inclination angle α satisfies: 0 ≤ β - α ≤ 5°.

[0066] Within the aforementioned range of differences, the two airflows can be deflected due to their mutual influence, thereby increasing the coverage area of ​​the airflow, i.e., increasing the air delivery range of the bladeless fan lamp. However, when the difference between the second inclination angle β and the first inclination angle α is greater than 5°, the airflow flowing out along the inner surface 11 of the second fan housing 2 will tend to concentrate too much in the middle area below the bladeless fan lamp, thus having a less significant impact on the airflow flowing out along the inner surface 11 of the first fan housing 1, which is not conducive to increasing the air delivery area.

[0067] Optionally, 5° ≤ α ≤ 45°, and / or α ≤ β ≤ 50°. For example, α = 5° and β = 10°; or α = 10° and β = 15°; or α = 15° and β = 20°; or α = 20° and β = 25°; or α = 25° and β = 30°; or α = 30° and β = 35°; or α = 35° and β = 40°; or α = 40° and β = 45°; or α = 45° and β = 50°.

[0068] Tests have shown that within this range, the airflow flowing out along the inner surface 11 of the second fan housing 2 and the airflow flowing out along the inner surface 11 of the first fan housing 1 will not accumulate excessively in the middle area below the bladeless fan light, thus ensuring the air supply effect to the surrounding area below the bladeless fan light.

[0069] Furthermore, 10° ≤ α ≤ 25°, and / or, α ≤ β ≤ 30°. For example, α = 10° and β = 13°; or α = 12° and β = 15°; or α = 12° and β = 17°; or α = 15° and β = 18°; or α = 15° and β = 20°; or α = 18° and β = 23°; or α = 20° and β = 24°; or α = 22° and β = 25°; or α = 24° and β = 28°; or α = 25° and β = 30°.

[0070] Tests show that within this range, the airflow flowing out along the inner surface 11 of the second fan housing 2 and the airflow flowing out along the inner surface 11 of the first fan housing 1 interact, resulting in a larger airflow area and a longer air delivery distance, thus providing a relatively better air delivery effect to the surrounding area below the bladeless fan light.

[0071] In one example, taking a difference of 5° between the second inclination angle β and the first inclination angle α, the air delivery effect of the bladeless fan light was tested under different first and second inclination angles. The test results are shown in Table 1 below.

[0072] Table 1. Test data on air delivery effect at different first and second inclination angles when β-α = 5°.

[0073] First inclination angle α / ° 5 15 25 35 45 Second inclination angle β / ° 10 20 30 40 50 Air supply range diameter / m 0.8 1 1.1 1.1 1.2 Maximum wind speed at 1.5m below the air outlet / m / s 1.8 1.6 1.2 0.8 0.7

[0074] As shown in Table 1, generally speaking, the larger the value of the first inclination angle α, the larger the air supply range and the smaller the maximum wind speed 1.5m below the air outlet 411. Taking all factors into consideration, the overall air supply effect is relatively good when the first inclination angle α = 15° and the second inclination angle β = 20°.

[0075] In some embodiments of this application, such as Figure 4As shown, multiple sets of guide members 5 are provided inside the annular air duct 41. The multiple sets of guide members 5 are used to guide the airflow inside the annular air duct 41 to flow in a pre-designed direction and reduce airflow loss during the flow process. Optionally, the multiple sets of guide members 5 can be connected to the inner surface 11 of the first air casing 1.

[0076] like Figure 4 As shown, each group of flow guides 5 includes at least one flow guide 5, and each flow guide 5 has at least one flow guiding surface 51. The flow guiding surface 51 is the surface on the flow guide 5 that serves to guide flow. For example, when the flow guide 5 is... Figure 4 When a guide vane is shown, the guide surface 51 is generally the surface of the vane facing the annular air duct 41. For example... Figure 5 As shown, the angle between the guiding direction of each guide surface 51 and the flow direction of the airflow generated by the wind turbine 3 is less than 90°, wherein the guiding direction is from the side of the guide surface 51 close to the wind turbine 3 to the side of the guide surface 51 away from the wind turbine 3.

[0077] by Figure 5 Taking the structure shown as an example, the impeller 3 rotates counterclockwise under the drive of the fan assembly, thereby generating airflow in a counterclockwise direction. At any position corresponding to the guide element 5, the tangential direction of the airflow at that position has an angle θ with the guiding direction of the guide surface 51, where 0° < θ < 90°. Therefore, when the airflow passes through this position, at least part of the airflow flows along the guiding direction on the guide surface 51, thus guiding the airflow to flow in a preset direction and facilitating the rapid formation of the airflow.

[0078] Furthermore, in this embodiment, the multiple sets of guide elements 5 are asymmetrically distributed along the circumference of the impeller 3. Asymmetrical distribution along the circumference means that the arrangement of objects or features in the circumferential direction is uneven and lacks symmetry. That is, when the multiple sets of guide elements 5 at different positions on the circumference rotate around the central axis passing through the center of the circle, their shapes, sizes, etc., are not completely symmetrical or completely consistent in various directions.

[0079] Alternatively, one way to distribute the multiple sets of guide elements 5 asymmetrically in the circumferential direction of the wind turbine 3 is to have an odd number of sets of guide elements 5.

[0080] For example, such as Figure 6 As shown, along the circumference of the impeller 3, five sets of guide elements 5 are arranged in the annular air duct 41. Therefore, five sets of airflows are formed at the air outlet 411. These five sets of airflows converge along the outer surface 21 of the second air casing 2 towards the central area below the bladeless fan lamp. Because the distribution of these five sets of airflows in the circumferential direction is asymmetrical, they will not cancel each other out when they converge, but will separate, thus deflecting the flow direction of the airflow and forming a periodic pulsating airflow. This expands the air supply range and creates an effect such as... Figure 12 and Figure 13 The image shows a natural wind with two pulsating currents, one inside and one outside.

[0081] In this embodiment, the odd-numbered air guides 5 can be arranged uniformly at equal intervals or non-uniformly at unequal intervals. Regardless of the arrangement, the odd-numbered airflows blown from the outlet 411 will have an asymmetrical distribution in the circumferential direction, resulting in airflow separation and forming periodic pulsating airflow, thus expanding the air delivery range. Generally speaking, compared to the case of uniformly spaced air guides 5, the airflow separation effect is better when the odd-numbered air guides 5 are arranged non-uniformly at unequal intervals, which is beneficial for further expanding the air delivery range.

[0082] Optionally, one way to asymmetrically distribute the guide members 5 along the circumference of the impeller 3 is to arrange multiple sets of guide members 5 in a non-equally spaced manner along the circumference of the impeller 3. It should be understood that each set of guide members 5 is arranged within a portion of the space within the annular channel to guide the airflow within that space; this range is defined as the arrangement range of each set of guide members 5. In this case, exemplarily, the number of sets of guide members can be odd or even.

[0083] When the guide elements 5 are arranged non-equidistantly in the circumferential direction of the impeller 3, non-equidistant airflows will be formed at the air outlet 411. These airflows will converge along the outer surface 21 of the second wind casing 2 towards the central area below the bladeless fan lamp. Because the distribution of these airflows in the circumferential direction is non-equidistant and asymmetrical, they will not cancel each other out when they converge, but will instead separate, causing the airflow direction to deflect and forming a periodic pulsating airflow. This expands the air supply range and creates a dual-channel pulsating natural wind. Optionally, the guide elements 5 can be asymmetrically distributed in the circumferential direction of the impeller 3 in at least two groups of guide elements 5, where at least one of the number, style, and arrangement of the guide elements 5 is different. In this case, the number of multiple groups of guide elements can be odd or even.

[0084] The style of the guide member 5 includes, but is not limited to, the shape of the guide member 5 and the area of ​​the guide surface 51. For example, in Figure 6 In this system, each group of guide elements 5 includes three styles of guide elements 5, and the area of ​​the guide surface 51 of these guide elements 5 is also different.

[0085] The arrangement of the flow guide 5 includes, but is not limited to, the flow direction (inclination angle) of the flow guide surface 51, the distance between it and adjacent flow guide 5, and the spacing relationship of multiple flow guide 5.

[0086] When at least one of the following is different: the number of guide elements 5, the style of guide elements 5, and the arrangement of guide elements 5 in each group of guide elements 5, the guiding effect of each group of guide elements 5 on the airflow within its arrangement range is also different. As a result, some characteristics of the multiple airflows formed at the air outlet 411 (such as wind speed, wind pressure, blowing angle, etc.) are also different.

[0087] Specifically, when there are at least two sets of guide elements 5 in the even array of guide elements 5, and each set of guide elements 5 differs in at least one aspect of quantity, style, and arrangement, an even array of airflows of varying strengths or directions will be formed at the air outlet 411. These airflows will converge along the outer surface 21 of the second fan housing 2 towards the central area below the bladeless fan lamp. However, because these airflows are asymmetrical due to their varying strengths or directions in the circumferential direction, they will not cancel each other out when they converge, but will instead separate, causing the airflow direction to deflect and forming a periodic pulsating airflow. This expands the air supply range and creates a dual-channel pulsating natural wind.

[0088] Generally speaking, the fewer the number of sets of guide elements 5 installed in the annular air duct 41, the fewer the number of airflow groups formed at the air outlet 411, and thus the larger the air delivery range; conversely, the more sets of guide elements 5 installed in the annular air duct 41, the more the number of airflow groups formed at the air outlet 411, and thus the smaller the air delivery range.

[0089] In some embodiments of this application, such as Figure 3 , Figure 7 and Figure 8 As shown, the outer surface 21 of the second air casing 2 includes a side surface 211 and a bottom surface 212, wherein the side surface 211 and the bottom surface 212 are bounded by the air outlet 411, which generally refers to the portion of the annular air duct 41 located at the opening plane of the first air casing 1. Figure 8 Taking the orientation shown as an example, the portion of the outer surface 21 of the second wind casing 2 located above the air outlet 411 and used to form the annular air duct 41 is the side surface 211. Generally, the side surface 211 can be understood as being completely located inside the first wind casing 1. The portion of the outer surface 21 of the second wind casing 2 located below the air outlet 411 is the bottom surface 212. Generally, the bottom surface 212 can be understood as being located outside the first wind casing 1, and the bottom surface 212 is connected to the side surface 211. The area below the air outlet 411 can be understood as the side of the air outlet 411 furthest from the impeller 3. Figure 8 As shown, from the edge of the bottom surface 212 to the center of the bottom surface 212, the bottom surface 212 gradually moves away from the air outlet 411 in the vertical direction, and the inclination angle of the bottom surface 212 gradually increases, with the vertical direction parallel to the extension direction of the central axis of the impeller 3.

[0090] As mentioned earlier, the airflow will roughly split into two streams after exiting through the air outlet 411. For the smaller stream of airflow blowing out along the outer surface 21 of the second fan housing 2, after exiting through the air outlet 411, since the bottom surface 212 of the second fan housing 2 is continuous with the side surface 211 and is positioned lower than the air outlet 411, and the inward inclination angle of the bottom surface 212 continuously increases from the edge to the center, based on the Coanda effect, this stream of air will continue to flow along the bottom surface 212, thereby achieving a better convergence effect towards the center, thus increasing the air volume in the middle area below the bladeless fan light to a certain extent and improving the air supply effect in the middle area.

[0091] There is a first distance H between the center of the bottom surface 212 of the second air casing 2 and the air outlet 411. Generally speaking, the first distance H should not be too small. If it is too small, the airflow is prone to boundary layer separation and detaches from the bottom surface 212 of the second air casing 2. As a result, the bottom surface 212 cannot play a good guiding role in the flow, and it is difficult to guarantee the improvement effect on the air supply range. At the same time, the first distance H should not be too large, otherwise the second air casing 2 will protrude too much relative to the air outlet 411, affecting the appearance.

[0092] In some embodiments of this application, such as Figure 8 As shown, along the vertical direction, the first distance H satisfies the following condition: 0.05×R≤H≤0.5×R. Where R is the outer diameter of the air outlet 411 of the annular air duct 41.

[0093] For example, the first distance H can be 0.05R, 0.1R, 0.15R, 0.2R, 0.25R, 0.3R, 0.35R, 0.4R, 0.45R, or 0.5R. By keeping the first distance H within the above range, the air delivery range can be improved without affecting the appearance of the bladeless fan light.

[0094] Furthermore, along the vertical direction, the first distance H satisfies the following condition: 0.25×R≤H≤0.35×R.

[0095] Table 2 below shows the test data on the effect of different values ​​of the first distance H on the air supply effect.

[0096] Table 2. Test data on the air supply effect of the first distance H with different values

[0097] First distance H / m 0.05R 0.15R 0.25R 0.35R 0.5R Air supply range diameter / m 0.7 1.0 1.1 1.1 1.1 Maximum wind speed at 1.5m below the air outlet / m / s 1.8 1.6 1.5 1.5 1.45

[0098] As shown in Table 2, generally speaking, the larger the value of the first distance H, the larger the air supply range and the smaller the maximum wind speed 1.5m below the air outlet 411. Taking all factors into consideration, the overall air supply effect is relatively good when the first distance H is between 0.25R and 0.35R.

[0099] Taking into account the overall size, cost, and aesthetics of the fan light, the first distance H can be equal to 0.25R.

[0100] See Figure 9 In this embodiment, the bottom surface 212 of the second air casing 2 includes an edge region 2121 and a transition region 2122 connected radially along the air outlet 411. The edge region 2121 is connected to the side surface 211, and the transition region 2122 is located between the center of the edge region 2121 and the center of the bottom surface 212. The curvature of the edge region 2121 is greater than the curvature of the transition region 2122.

[0101] In other words, the bottom surface 212 has a distinct corner in the edge region 2121. This corner can control at least a portion of the airflow attached to the second wind shell 2 to separate from the boundary layer of the bottom surface 212 in a timely manner, thereby preventing the airflow from gathering too much towards the center of the bottom surface 212, and thus preventing the airflow from being unable to diffuse to another airflow.

[0102] Optionally, such as Figure 9 As shown, there is a third distance D between the edge region 2121 and the center of the bottom surface 212, where 0.90d ≤ D ≤ 0.98d. Optionally, the third distance D = 0.96d. Where d is the distance between the center of the bottom surface 212 and the outermost edge.

[0103] In some embodiments of this application, such as Figure 8 As shown, the bottom surface 212 of the second air casing 2 has a third inclination angle γ at a designated position, 10°≤γ≤60°. The designated position is a position with a second distance L between the bottom surface 212 and the center along the radial direction of the air outlet 411, where L=2 / 3×R, and R is the outer diameter of the air outlet 411 of the annular air duct 41.

[0104] For example, γ can be 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, or 60°. When γ is within the above angle range, based on the Coanda effect, the small stream of airflow attached to the second air shell 2 will almost completely detach from the bottom surface 212 of the second air shell 2 when it flows through the designated position. This ensures that the airflow does not gather too much towards the center of the bottom surface 212, thereby ensuring the effect on the other airflow and, to a certain extent, ensuring the increase in the air supply range.

[0105] Furthermore, 40°≤γ≤55°. For example, γ can be 40°, 42°, 44°, 45°, 47°, 49°, 50°, 51°, 53°, or 55°. When γ is within this angular range, the small streams of airflow adhering to the second wind shell 2 based on the Coanda effect will have a relatively sufficient degree of detachment from the second wind shell 2.

[0106] Optionally, the third inclination angle γ = 50°. Tests have shown that this angle of γ provides the best effect in detaching from the second wind shell 2, achieving almost complete detachment.

[0107] It should be noted that the airflow has basically completely detached from the bottom surface 212 of the second wind shell 2, including the case where the airflow has completely detached from the bottom surface 212 of the second wind shell 2, and the case where most of the airflow has detached from the bottom surface 212 of the second wind shell 2, but a very small amount of airflow may still be attached to the second wind shell 2.

[0108] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0109] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A bladeless fan light, characterized in that, The bladeless fan light includes a first wind housing (1), a second wind housing (2), and a fan wheel (3). A wind cavity (4) is formed between the first wind housing (1) and the second wind housing (2), and the fan wheel (3) is located inside the wind cavity (4). The air cavity (4) includes an annular air duct (41) formed between the inner surface (11) of the first air shell (1), the outer surface (21) of the second air shell (2) and the airflow outlet (31) of the impeller (3), and the air outlet (411) of the annular air duct (41) is opposite to the airflow outlet (31). The inner surface (11) of the first wind shell (1) and the outer surface (21) of the second wind shell (2) converge inward at the air outlet (411). The inner surface (11) of the first wind shell (1) has a first inward inclination angle α at the air outlet (411), and the outer surface (21) of the second wind shell (2) has a second inclination angle β at the air outlet (411), where α≤β, and the inclination angle is the angle with the vertical direction.

2. The bladeless fan light according to claim 1, characterized in that, The difference between the second inclination angle β and the first inclination angle α satisfies the following condition: 0≤β-α≤5°。 3. The bladeless fan light according to claim 1 or 2, characterized in that, 5°≤α≤45°, and / or, β≤50°.

4. The bladeless fan light according to claim 3, characterized in that, 10°≤α≤25°, and / or, β≤30°.

5. The bladeless fan light according to claim 1, characterized in that, The annular air duct (41) is provided with multiple sets of guide elements (5) that are asymmetrically distributed along the circumference of the wind turbine (3); Each of the guide elements (5) has at least one guide surface (51), the angle between the guide direction of the guide surface (51) and the flow direction of the airflow generated by the impeller (3) is less than 90°, wherein the guide direction is from the side of the guide surface (51) close to the impeller (3) to the side of the guide surface (51) away from the impeller (3).

6. The bladeless fan light according to claim 5, characterized in that, The number of the multiple sets of guide elements (5) is odd.

7. The bladeless fan light according to claim 5, characterized in that, The multiple sets of guide elements (5) are arranged at non-equidistant intervals in the circumferential direction of the wind turbine (3), wherein each set of guide elements (5) can guide the airflow within its arrangement range; and / or, In at least two sets of the flow guides (5), at least one of the quantity, style and arrangement of the flow guides (5) is different.

8. The bladeless fan light according to claim 1, characterized in that, The outer surface (21) of the second wind housing (2) includes a side surface (211) and a bottom surface (212). The side surface (211) is located inside the first wind housing (1). The bottom surface (212) is connected to the side surface (211) and is located on the side of the air outlet (411) away from the impeller (3). The bottom surface (212) is curved. From the edge of the bottom surface (212) to the center of the bottom surface (212), the bottom surface (212) gradually moves away from the air outlet (411) in the vertical direction, and the inclination angle of the bottom surface (212) gradually increases.

9. The bladeless fan light according to claim 8, characterized in that, Along the vertical direction, there is a first distance H between the center of the bottom surface (212) of the second air casing (2) and the air outlet (411), the first distance H satisfying the following condition: 0.05×R≤H≤0.5×R Wherein, R is the outer diameter of the air outlet (411) of the annular air duct (41).

10. The bladeless fan light according to claim 9, characterized in that, The first distance H satisfies the following condition: 0.25×R≤H≤0.35×R.

11. The bladeless fan light according to claim 8, characterized in that, The bottom surface (212) of the second air casing (2) includes an edge region (2121) and a transition region (2122) that are radially connected along the air outlet (411), the edge region (2121) being connected to the side surface (211), and the transition region (2122) being located between the center of the edge region (2121) and the bottom surface (212); The curvature of the edge region (2121) is greater than that of the transition region (2122).

12. The bladeless fan light according to any one of claims 8-11, characterized in that, The bottom surface (212) of the second wind shell (2) has a third inclination angle γ at a specified position, 10°≤γ≤60°; The designated position is a position with a second distance L between the air outlet (411) and the center of the bottom surface (212) along the radial direction of the air outlet (411), where L = 2 / 3 × R, and R is the outer diameter of the air outlet (411) of the annular air duct (41).

13. The bladeless fan light according to claim 12, characterized in that, The third inclination angle γ satisfies: 40°≤γ≤55°.

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