Ceiling fan and fan lamp

Abstract

The invention provides a ceiling fan and a fan lamp, and belongs to the technical field of household appliances. The ceiling fan comprises a shell, a fan assembly and a plurality of air guide pieces. The fan assembly is located in the shell, and the air guide piece surrounds the fan assembly. The air guide piece is provided with a first air guide part, in a reference plane perpendicular to the central axis of the annular opening, the connecting lines between the head end and the central axis of the annular opening and between the tail end of the first air guide part and the central axis of the annular opening are set as a first reference line and a second reference line correspondingly, and the second reference line and the first reference line are sequentially arranged in the circumferential direction in the rotating direction of the fan assembly. The deflection direction of the first flow guide part is close to the direction of airflow flowing out of the fan assembly, the airflow can be prevented from violently colliding with the first flow guide part, and therefore noise generated by the airflow can be reduced. According to the ceiling fan, the first air guide part is arc-shaped, and the concave surface of the first air guide part is opposite to the fan assembly, so that the air outlet of the ceiling fan is more uniform, and the airflow can be blown to a farther distance.

Description

[0001] This disclosure claims priority to Chinese patent application No. 202322523767.X filed on September 15, 2023, and utility model name “Ceiling fan and fan lamp with long air supply distance and uniform annular air output”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of household appliances, and in particular to a ceiling fan and a fan lamp. Background Art

[0003] A ceiling fan is a commonly used household appliance. The ceiling fan comprises a housing and a fan assembly, wherein the fan assembly is located inside the housing, and the fan assembly draws air from an air inlet of the housing and delivers air to the outside through an annular opening at the bottom of the housing.

[0004] Currently, how to improve the air supply effect of ceiling fans, such as increasing the air supply distance, improving air supply uniformity or reducing noise, is a key technical issue. Summary of the invention

[0005] The present disclosure provides a ceiling fan and a fan lamp, which can improve the air supply effect of the ceiling fan. The technical solutions of the ceiling fan and the fan lamp are as follows:

[0006] In a first aspect, the present disclosure provides a ceiling fan, the ceiling fan comprising a housing, a fan assembly, and a plurality of air guides;

[0007] The housing has an air inlet and a circular opening at the bottom;

[0008] The fan assembly is located inside the housing, the plurality of air guides surround the fan assembly, the air guide has a first air guide portion, and a terminal end of the first air guide portion is connected to the housing;

[0009] Among them, in a reference plane perpendicular to the central axis of the annular opening, a line between the head end of the first air guide portion and the central axis of the annular opening is set as a first reference line, a line between the end of the first air guide portion and the central axis of the annular opening is set as a second reference line, the second reference line and the first reference line are arranged in sequence in a circumferential direction along the rotation direction of the fan assembly, the first air guide portion is arc-shaped, and the concave surface of the first air guide portion faces away from the fan assembly.

[0010] In a possible implementation, the fan assembly includes an impeller, the impeller includes a plurality of blades, and the plurality of blades are arranged in a ring shape and surround the air inlet;

[0011] In a reference plane perpendicular to the central axis of the annular opening, the line between the end of the blade and the central axis of the impeller is set as the fifth reference line, the straight line passing through the end of the blade and perpendicular to the fifth reference line is set as the sixth reference line, the obtuse angle formed between the sixth reference line and the line between the head end and the end of the blade is λ1, the line between the head end of the first air guide portion and the central axis of the impeller is set as the seventh reference line, the straight line perpendicular to the seventh reference line at the head end of the first air guide portion is set as the eighth reference line, the acute angle formed between the eighth reference line and the tangent at the head end of the first air guide portion is set as λ2, then λ1-90°≤λ2≤λ1-80°.

[0012] In a possible implementation, a line between the end of the first air guide portion and the central axis of the impeller is assumed to be a ninth reference line, a straight line passing through the end of the first air guide portion and perpendicular to the ninth reference line is assumed to be a tenth reference line, and an acute angle formed between the tenth reference line and the tangent at the end of the first air guide portion is λ3, then λ2+20°≤λ3≤λ2+40°.

[0013] In a possible implementation, the fan assembly includes an impeller, the impeller includes a plurality of blades, and the plurality of blades are arranged in a ring shape and surround the air inlet;

[0014] The leading edge of the blade has a convex structure, the convex structure is located between the top and the bottom of the leading edge, and the convex structure protrudes in a direction close to the air inlet, wherein the leading edge is the edge of the blade close to the air inlet;

[0015] The height of the top of the head end of the first air guiding portion is lower than the height of the forward convex structure.

[0016] In a possible implementation, assume that the distance between the top of the head end of the first air guide portion and the central axis of the annular opening is L1, the distance between the bottom of the head end of the first air guide portion and the central axis of the annular opening is L2, and the maximum radius of the impeller is R, then L2>L1, 0.05(L2-R)≤L2-L1≤0.2(L2-R).

[0017] In a possible implementation, in the reference plane, assuming that an angle between a tangent line of the end of the first air guide portion and a line connecting the end of the first air guide portion and the central axis of the annular opening is ε, then 0°<ε<20°.

[0018] In a possible implementation, the air guide member further includes a second air guide portion, a head end of the second air guide portion is connected to a head end of the first air guide portion, and the second air guide portion faces the fan assembly;

[0019] Among them, in a reference plane perpendicular to the central axis of the annular opening, the line between the end of the second air guide portion and the central axis of the annular opening is set as the third reference line, and the second reference line is located between the first reference line and the third reference line.

[0020] In a possible implementation manner, assuming that the angle between the third reference line and the second reference line is α, then 20°<α<30°.

[0021] In a possible implementation manner, in the reference plane, assuming that the angle between the first reference line and the second reference line is γ, then 0°<γ<15°.

[0022] In a possible implementation, within the reference plane, assuming that an angle between the first air guide portion and the second air guide portion at a connection point is δ, then δ is an acute angle.

[0023] In a possible implementation, 9°<δ<38°.

[0024] In a possible implementation manner, assuming that the angle between the tangent line of the head end of the second air guiding portion and the first reference line is φ, then φ>145°.

[0025] In a possible implementation, within the reference plane, assuming that the distance between the head end of the second air guide portion and the central axis of the annular opening is r1, the maximum radius of the impeller of the fan assembly is R, and the number of the air guide members is z, then (0.1+0.01z)R≤r1-R≤0.4R.

[0026] In a possible implementation, a transition surface is provided at a connection between the second air guide portion and the first air guide portion;

[0027] In the reference plane, assuming that the distance between the head end of the first air guide portion and the central axis of the annular opening is r1, the maximum radius of the impeller of the fan assembly is R, and the radius of the transition surface is r3, then 0.5(r1-R)≤r3≤2(r1-R).

[0028] In a possible implementation, a transition surface is provided at a connection between the second air guide portion and the first air guide portion;

[0029] The transition surface has at least two locations with different distances from the center axis of the annular opening.

[0030] In a possible implementation, in the reference plane, assuming that the angle between the tangent of the end of the second sub-wind guide surface and the line connecting the end of the second sub-wind guide surface and the central axis of the annular opening is ω, then 0°<ω<20°.

[0031] In a possible implementation, a transition surface is provided at a connection between the second air guide portion and the first air guide portion;

[0032] The transition surface has different radii at at least two locations.

[0033] In a second aspect, the present disclosure provides a fan light, the fan light comprising a ceiling fan and a light module as described in any one of the first aspects;

[0034] The lamp module is connected to the inner shell of the ceiling fan.

[0035] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0036] The ceiling fan provided by the present invention has a second reference line and a first reference line arranged in sequence in a circumferential direction along the rotation direction of the fan assembly, so that the deflection direction of the first guide portion is along the rotation direction of the fan assembly, thereby making the deflection direction of the first guide portion close to the airflow direction outflowing from the fan assembly, thereby avoiding a violent collision between the airflow and the first guide portion, thereby reducing the noise generated by the airflow.

[0037] The first air guide portion is arc-shaped. On the one hand, compared with the straight first air guide portion, setting the first air guide portion to be arc-shaped can increase the length of the first air guide portion, thereby increasing the pressurization path of the airflow, which is beneficial to increase the wind pressure. Since the length of the second air guide portion is longer, increasing the length of the first air guide portion can reduce the pressure difference between the end of the second air guide portion and the end of the first air guide portion, thereby making the air outlet of the annular opening more uniform. On the other hand, the first air guide portion can deflect the flow direction of the wind toward the radial direction of the fan assembly, so that the airflow has a larger radial component after flowing to the annular opening, which is beneficial for the airflow to blow to a farther distance.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0040] Figure 1 is an exploded view of a ceiling fan shown in an embodiment of the present disclosure;

[0041] Figure 2 is a structural schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0042] Figure 3 is a bottom view of a ceiling fan shown in an embodiment of the present disclosure;

[0043] Figure 4 is a structural schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0044] Figure 5 is a cross-sectional view of a ceiling fan shown in an embodiment of the present disclosure;

[0045] Figure 6 is a schematic diagram of a central angle occupied by two ends of a shielding tongue and a wind-sensing radius shown in an embodiment of the present disclosure;

[0046] Figure 7 is a wind direction schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0047] Figure 8 is a wind direction schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0048] Fig. 9 is a structural schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0049] Fig.10 is a structural schematic diagram of a ceiling fan shown in an embodiment of the present disclosure;

[0050] Fig.11 is a schematic structural diagram of a shielding tongue shown in an embodiment of the present disclosure;

[0051] Fig.12 is a cross-sectional view of a shielding tongue shown in an embodiment of the present disclosure;

[0052] Fig.13 is a cross-sectional view of a shielding tongue shown in an embodiment of the present disclosure;

[0053] Fig.14 is a cross-sectional view of a shielding tongue shown in an embodiment of the present disclosure;

[0054] Fig.15 is an exploded view of a ceiling fan shown in an embodiment of the present disclosure;

[0055] Fig.16 is a schematic diagram of a demoulding process of a shielding tongue shown in an embodiment of the present disclosure;

[0056] Fig.17 is a schematic diagram of a demoulding process of a shielding tongue shown in an embodiment of the present disclosure;

[0057] Fig.18 is a schematic diagram of a demoulding process of a shielding tongue shown in an embodiment of the present disclosure;

[0058] Fig.19 is a schematic diagram of a demoulding process of a shielding tongue shown in an embodiment of the present disclosure;

[0059] Fig. 20 is a schematic diagram of a demoulding process of a shielding tongue shown in an embodiment of the present disclosure;

[0060] Fig.21 is a cross-sectional view of a ceiling fan shown in an embodiment of the present disclosure;

[0061] Fig. 22 It is a cross-sectional view of a ceiling fan shown in an embodiment of the present disclosure.

[0062] Legend:

[0063] 1. shell, 11. air inlet, 12. annular opening, 120. air outlet, 101. outer shell, 1011. first arc-shaped portion, 102. inner shell, 1021. second arc-shaped portion;

[0064] 2. fan assembly, 21. impeller, 211. blade, 2111. leading edge, 2111a. front convex structure, 2112. trailing edge;

[0065] 3. air guide member, 31. first air guide portion, 32. second air guide portion, 321. first sub-air guide surface, 322. second sub-air guide surface, 33. transition surface;

[0066] 4. Light module;

[0067] 5. cover, 51. air inlet;

[0068] 100, upper die, 1001, convex;

[0069] 200, lower die, 2001, groove;

[0070] a. The first reference line;

[0071] b. The third reference line;

[0072] c. Second reference line;

[0073] d. fourth reference line;

[0074] m, fifth reference line;

[0075] n, sixth reference line;

[0076] p, seventh reference line;

[0077] q, eighth reference line;

[0078] e. Ninth reference line;

[0079] f. Tenth reference line.

[0080] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0081] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0082] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0083] The present disclosure provides a ceiling fan. Fig.21 and Fig. 22 As shown, the ceiling fan includes a housing 1, a fan assembly 2 and a plurality of air guides 3. The housing 1 has an air inlet 11 and a ring-shaped opening 12 at the bottom. The fan assembly 2 is located inside the housing 1, and the air guide 3 surrounds the fan assembly 2. The air guide 3 has a first air guide portion 31, and the end of the first air guide portion 31 is connected to the housing 1. Among them, in a reference plane perpendicular to the central axis of the ring-shaped opening 12, the line between the head end of the first air guide portion 31 and the central axis of the ring-shaped opening 12 is set as the first reference line a, and the line between the end of the first air guide portion 31 and the central axis of the ring-shaped opening 12 is set as the second reference line c, and the second reference line c and the first reference line a are arranged in sequence in a circumferential direction along the rotation direction of the fan assembly 2. The first air guide portion 31 is arc-shaped, and the concave surface of the first air guide portion 31 faces away from the fan assembly 2.

[0084] The annular opening 12 is divided into a plurality of air outlets arranged in an annular shape by the air guide 3. If the air guide 3 only includes the first air guide portion 31, the first air guide portion 31 divides the annular opening 12 into a plurality of air outlets arranged in a continuous pattern.

[0085] In the ceiling fan provided by the embodiment of the present disclosure, the second reference line c and the first reference line a are arranged along the rotation direction of the fan assembly 2, which can make the deflection direction of the first guide portion 31 along the rotation direction of the fan assembly 2, so that the deflection direction of the first guide portion 31 is close to the airflow direction flowing out of the fan assembly 2, which can avoid the airflow from colliding violently with the first guide portion 31, thereby reducing the noise generated by the airflow.

[0086] The first air guide portion 31 is in an arc shape. On the one hand, compared with the straight first air guide portion 31, setting the first air guide portion 31 in an arc shape can increase the length of the first air guide portion 31, thereby increasing the pressurization path of the airflow, which is beneficial to increase the wind pressure. Since the length of the second air guide portion 32 is longer, increasing the length of the first air guide portion 31 can reduce the pressure difference between the end of the second air guide portion 32 and the end of the first air guide portion 31, thereby making the air outlet of the annular opening 12 more uniform. On the other hand, the first air guide portion 31 can deflect the flow direction of the wind toward the radial direction of the fan assembly 2, so that the airflow has a larger radial component after flowing to the annular opening 12, which is beneficial for the airflow to blow to a farther distance.

[0087] In some examples, such as Fig. 22 As shown, the fan assembly 2 includes an impeller 21, and the impeller 21 includes a plurality of blades 211, and the plurality of blades 211 are arranged in a ring shape and surround the air inlet 11. In a reference plane perpendicular to the central axis of the annular opening 12, the line between the end of the blade 211 and the central axis of the impeller 21 is set as the fifth reference line m, the straight line passing through the end of the blade 211 and perpendicular to the fifth reference line m is set as the sixth reference line n, the obtuse angle formed between the sixth reference line n and the line between the head end and the end of the blade 211 is λ1, the line between the head end of the first air guide portion 31 and the central axis of the impeller 21 is the seventh reference line p, the straight line between the head end of the first air guide portion 31 and perpendicular to the seventh reference line p is the eighth reference line q, the acute angle formed between the eighth reference line q and the tangent at the head end of the first air guide portion 31 is λ2, then λ1-90°≤λ2≤λ1-80°.

[0088] When the airflow flows through the impeller 21, it has a component velocity in the first direction and the second direction, wherein the first direction is the direction of the fifth reference line m, and the second direction is the direction of the line connecting the head end and the tail end of the blade 211, so the absolute velocity of the airflow is between the first direction and the second direction. Setting λ1-90°≤λ2≤λ1-80° can make the direction of the tangent line at the head end of the first air guide 31 between the first direction and the second direction, so that the airflow is as parallel to the head end of the first air guide 32 as possible. In this way, the impact of the airflow on the first air guide can be reduced, thereby reducing the noise generated by the airflow.

[0089] In some examples, such as Fig. 22 As shown, let the line between the end of the first air guide portion 31 and the central axis of the impeller 21 be the ninth reference line e, the straight line passing through the end of the first air guide portion 31 and perpendicular to the ninth reference line e be the tenth reference line f, and the acute angle formed between the tenth reference line f and the tangent at the end of the first air guide portion 31 is λ3, then λ2+20°≤λ3≤λ2+40°.

[0090] In this way, the end of the first air guide portion 31 can be as close to the radial direction of the impeller 21 as possible, so that the airflow is deflected along the radial direction of the impeller 21 when it flows out from the end of the first air guide portion 31. This makes the airflow more concentrated, can reduce airflow losses, and is conducive to the airflow blowing to a farther distance. The farther the wind blows, the easier it is for the wind blown out of each air outlet to be continuous in the circumferential direction, thereby improving the effect of uniform annular air outlet of the ceiling fan. If the difference between λ3 and λ2 is too large, the deflection direction of the end of the first air guide portion 31 may be opposite to the deflection direction of the head end of the first air guide portion 31, causing the first air guide portion 31 to deviate from the radial direction of the impeller 21.

[0091] In some examples, such as Fig.21 As shown, the leading edge 2111 of the blade 211 has a convex structure 2111a, which is located between the top and the bottom of the leading edge 2111, and the convex structure 2111a protrudes in the direction close to the air inlet 11. The leading edge 2111 is the edge of the blade 211 close to the air inlet 11. Assuming that the distance between the top of the leading edge 2111 and the central axis of the annular opening 12 is R1, the distance between the bottom of the leading edge 2111 and the central axis of the annular opening 12 is R2, and the distance between the convex structure 2111a and the central axis of the annular opening 12 is R3, then R1>R3, and R2>R3. The height of the top of the leading end of the first air guide 31 is lower than the height of the convex structure 2111a.

[0092] Among them, according to the principle of bionics, the convex structure 2111a can imitate the convex structure at the leading edge of a bird's wing to reduce the eddy current at the leading edge 2111 of the blade 211, making the air flow more stable, so that the air resistance received by the leading edge 2111 of the blade 211 is smaller, and thus reducing the wind noise at the leading edge 2111.

[0093] If the top of the leading end of the first air guiding part 31 is higher than the convex structure 2111a, it will cause the overall height of the first air guiding part 31 to be relatively high, resulting in a relatively large thickness of the ceiling fan, and thus a relatively large volume and weight of the ceiling fan.

[0094] In some examples, such as Fig.21 As shown, the housing 1 includes an outer housing 101 and an inner housing 102. The outer housing 101 surrounds the inner housing 102. The outer housing 101 has an air inlet 11, and an annular opening 12 is formed between the bottom of the outer housing 101 and the bottom of the inner housing 102. The top of the leading end of the first air guiding part 31 is connected to the outer housing 101, and the bottom of the leading end of the first air guiding part 31 is connected to the inner housing 102. Among them, the bottom of the leading end of the first air guiding part 31 is located below the bottom of the impeller 21. If the bottom of the leading end of the first air guiding part 31 is located above the bottom of the impeller 21, the connection position of the bottom of the leading end of the first air guiding part 31 of the inner housing 102 will also be located above the bottom of the impeller 21, thus blocking the air outlet of the impeller 21.

[0095] In some examples, such as Fig.21 As shown, let the height of the trailing edge 2112 of the blade 211 be H1, and the height difference between the top of the leading end of the first air guiding part 31 and the convex structure 2111a be H2, then H2 ≤ 0.2H1, where the trailing edge 2112 is opposite to the leading edge 2111. It can be known from simulation and test data that when 0 < H2 ≤ 0.2H1, the air guiding effect of the first air guiding part 31 is the best and the generated noise is the smallest. If H2 is too large, it will cause the height of the first air guiding part 31 to be too low, so that after the air flow flows out of the blade 211, it cannot be quickly guided by the first air guiding part 31, but is likely to directly collide with the housing 1, resulting in a relatively large noise generated by the air flow.

[0096] In some examples, the height of the bottom of the leading end of the first air guiding part 31 is higher than the height of the bottom of the trailing end of the first air guiding part 31, and / or the height of the bottom of the leading end of the first air guiding part 31 is lower than the height of the impeller 21 at the central axis of the annular opening 12. This can form a downward air duct in the housing 1. When the air flow passes through the convex structure 2111a, the main air inlet part is guided to the first air guiding part 31 below, and then flows to the annular opening 12. Thus, the flow direction of the air flow changes slowly, avoiding a large noise generated by the sudden change of the air flow direction at the annular opening 12.

[0097] In some examples, along the direction from the air inlet 11 to the annular opening 12, the distance between the head end of the first air guide 31 and the central axis of the annular opening 12 gradually increases or decreases. In this way, the airflow can collide with different positions of the head end of the first air guide 31 at different times. For example, along the direction from the air inlet 11 to the annular opening 12, the distance between the head end of the first air guide 31 and the central axis of the annular opening 12 gradually increases, so that the top of the head end of the first air guide 31 is closest to the blade 211. Therefore, after the airflow flows out from the blade 211, it first collides with the top of the head end of the first air guide 31 and then collides with the bottom, thereby reducing the collision strength between the airflow and the first air guide 31, and further reducing the noise generated by the airflow.

[0098] In some examples, such as Fig.21 As shown, assuming that the distance between the top of the head end of the first air guide portion 31 and the central axis of the annular opening 12 is L1, the distance between the bottom of the head end of the first air guide portion 31 and the central axis of the annular opening 12 is L2, and the maximum radius of the impeller 21 is R, then L2>L1, 0.05L2-R≤L2-L1≤0.2L2-R.

[0099] The housing 1 includes an outer shell 101 and an inner shell 102. The outer shell 101 surrounds the inner shell 102. The outer shell 101 has an air inlet 11. An annular opening 12 is formed between the bottom of the outer shell 101 and the bottom of the inner shell 102. The distance between the outer shell 101 and the central axis of the annular opening 12 gradually increases along the direction from the air inlet 11 to the annular opening 12, and the distance between the head end of the first air guide 31 and the central axis of the annular opening 12 gradually increases. Since the distance between the outer shell 101 and the central axis of the annular opening 12 gradually increases along the direction from the air inlet 11 to the annular opening 12, if L2<L1, the distance between the head end of the bottom of the first air guide 31 and the outer shell 101 will be too large, so that the air guide path at the bottom of the first air guide 31 is longer, thereby increasing the pressurization path of the airflow. This will cause the wind pressure at the end of the bottom of the first air guide 31 to be larger, resulting in greater noise generated by the airflow.

[0100] For 0.05L2-R≤L2-L1≤0.2L2-R, if L2-L1 is too large, the distance between the top of the head end of the first air guide 31 and the trailing edge of the blade 211 will be too close, so that the airflow has a high velocity when it reaches the top of the head end of the first air guide 31, and thus the collision with the first air guide 31 is more intense, resulting in a loud noise. If L2-L1 is too small, the distance between the bottom of the head end of the first air guide 31 and the trailing edge of the blade 211 will be too far, so that the airflow has a low velocity when it reaches the bottom of the head end of the first air guide 31, and thus the air supply distance of the ceiling fan is shorter.

[0101] In some examples, such as Fig. 9 As shown, in the reference plane, let the angle between the tangent of the end of the first air guide 31 and the line connecting the end of the first air guide 31 and the central axis of the annular opening 12 be ε, then 0°<ε<20°. In this way, the angle between the wind direction at the end of the first air guide 31 and the radial direction of the annular opening 12 can be made smaller, so that the first air guide 31 can deflect the air outlet direction toward the radial direction of the ceiling fan, which is conducive to increasing the radial air supply distance of the ceiling fan.

[0102] like Figure 1-Figure 4 As shown, the ceiling fan comprises a housing 1, a fan assembly 2 and a plurality of air guides 3. The housing 1 has an air inlet 11 and a circular opening 12 at the bottom. The fan assembly 2 is located inside the housing 1, and a plurality of air guides 3 surround the fan assembly 2, and the circular opening 12 is divided into a plurality of air outlets 120. The air guide 3 has a second air guide portion 32 and a first air guide portion 31, the second air guide portion 32 faces the fan assembly 2, the head end of the second air guide portion 32 is connected to the head end of the first air guide portion 31, and an air outlet 120 is provided between the first air guide portion 31 of one air guide portion 3 and the second air guide portion 32 of the adjacent air guide portion 3.

[0103] Among them, Figure 4 As shown, in a reference plane perpendicular to the central axis of the annular opening 12, a line between a head end of the second air guide portion 32 or a head end of the first air guide portion 31 and the central axis of the annular opening 12 is set as a first reference line a, and a line between a terminal end of the second air guide portion 32 and the central axis of the annular opening 12 is set as a third reference line b, then the second reference line c is located between the first reference line a and the third reference line b.

[0104] The axis of the annular opening 12, the axis of the fan assembly 2 and the axis of the entire ceiling fan are collinear.

[0105] The length of the second air guiding portion 32 is greater than that of the first air guiding portion 31 .

[0106] like Figure 5 As shown, the fan assembly 2 includes an impeller 21 and a motor 22. The motor 22 is fixed below the housing 1. The impeller 21 and the motor 22 are transmission-connected. The impeller 22 is opposite to the air inlet 11. The fan assembly 2 can be a centrifugal fan or a diagonal flow fan.

[0107] When the air guide member 3 includes the first air guide portion 31 and the second air guide portion 32 , the first air guide portion 31 may be in an arc shape, a straight shape or other shapes.

[0108] In the ceiling fan provided by the embodiment of the present disclosure, the angle occupied by the second air guide portion 32 of the air guide member 3 is the angle between the first reference line a and the third reference line b, and the angle occupied by the portion shielded by the air guide member 3 is the angle between the second reference line c and the third reference line b. Since the second reference line c is located between the first reference line a and the third reference line b, the angle occupied by the second air guide portion 32 is greater than the angle occupied by the portion shielded by the air guide member 3.

[0109] In this way, the wind guide member 3 has a second wind guide portion 32 of sufficient length, and the length of the portion shielded by the wind guide member 3 is relatively short, so that the ceiling fan not only has a long air delivery distance, but also the wind blown out of each air outlet can be continuous in the circumferential direction, and the annular air outlet of the ceiling fan is more uniform. In addition, the above design also makes the length of the first wind guide portion 31 longer, and the first wind guide portion 31 can also play a good wind guiding effect.

[0110] In some examples, such as Figure 4 As shown, assuming that the angle between the third reference line b and the second reference line c is α, then 20°<α<30°.

[0111] like Figure 6 As shown in the figure, the horizontal axis represents α, the unit is °, and the vertical axis represents the wind feeling radius, that is, the blowing radius that the user can feel when using the ceiling fan provided by the embodiment of the present disclosure, the unit is m.

[0112] from Figure 6 It can be seen that as α increases, the wind-sensing radius also gradually increases. Since the wind-sensing radius is small when 0°<α<20°, α>20° can be set. When α>30°, although the wind-sensing radius is still increasing, it will cause the wind guide 3 to block too much of the annular opening 12, making the air outlet 120 too small, thereby making the ceiling fan air uneven. Therefore, in some examples, 20°<α<30°.

[0113] In some examples, such as Figure 4 As shown, assuming the number of air guides 3 is z, then 130° / α<z<150° / α. That is, the angle occupied by the total shielding portion of the plurality of air guides 3 is at least 130° and at most 150°.

[0114] According to experimental measurements, if z<130° / α, i.e., zα<130°, the angle occupied by the shielded portion of the multiple air guides 3 is too small, which will make the air outlet area of ​​each air outlet 120 larger, making it difficult for the air outlet 120 to increase the wind pressure and wind force. At the same time, the length of the second air guide 32 and the first air guide 31 will be shorter, making the airflow in the second air guide 32 and the first air guide 31 have a smaller pressure-increasing path, which is not conducive to increasing the air pressure at the air outlet 120.

[0115] If z>150° / α, i.e. zα>150°, the shielded portion of the multiple air guides 3 will occupy too much, which will cause the air outlet 120 to be too small. Although the air pressure at the air outlet 120 will be higher, since there is no air coming out of the air guide 3, the wind blown out of the multiple air outlets 120 will be difficult to be continuous in the circumferential direction, making the annular air supply of the ceiling fan uneven. In addition, if the air outlet 120 is too small, the wind speed at the air outlet 120 will be too high, resulting in greater wind noise. Moreover, if the shielded portion of the multiple air guides 3 occupies too much, the collision area between the airflow and the air guide 3 will increase, thereby increasing the collision strength between the airflow and the air guide 3, and further increasing the wind noise.

[0116] In some examples, such as Figure 4 As shown, 4≤z≤6. Exemplarily, z=6. If the number z of the air guides 3 is too small, the air outlet 120 will be too large, so that the wind speed at the air outlet 120 is too small, which is not conducive to increasing the air supply distance of the air outlet 120. If the number z of the air guides 3 is too large, on the one hand, the collision frequency between the airflow and the air guides 3 will be increased, resulting in excessive collision intensity between the airflow and the air guides 3, thereby generating greater noise. On the other hand, it will cause the air outlet 120 to be too small, so that the wind speed at the air outlet 120 is too large, resulting in greater wind noise.

[0117] In some examples, such as Figure 4 As shown, in the reference plane, the angle between the first reference line a and the second reference line c is assumed to be γ, and 0°<γ<15°.

[0118] If γ is too large, the angle between the second air guide portion 32 and the first air guide portion 31 will be too small, making it difficult to process the air guide member 3. It will also cause the air outlet 120 to be too large, resulting in too small wind speed and wind pressure at the air outlet 120, which is not conducive to increasing the air supply distance of the air outlet 120. If γ is too small, on the one hand, the air outlet 120 will be too small, resulting in too high wind speed at the air outlet 120, and then generating greater noise. On the other hand, the spacing between adjacent air outlets 120 will be too large, which will not achieve the above-mentioned effect of more uniform annular air outlet.

[0119] In some examples, such as Fig. 22 As shown, the plurality of blades 211 are arranged in a vortex shape. The air guide 3 is used to guide the airflow blown out by the impeller 21 to flow in an annular direction, wherein the air guide direction of the plurality of air guides 3 is opposite to the vortex direction of the plurality of blades 211 .

[0120] In the embodiment of the present application, opposite direction means that the extension direction from the leading edge 2111 of the blade 211 to the trailing edge 2112 is towards a different side from the guide direction of the multiple air guide members 3, and does not indicate that the guide direction is 180° opposite to the vortex direction.

[0121] The “vortex arrangement” means that in the direction from the center of the impeller 21 to the edge (in the direction away from the rotation axis of the impeller 21), the distance between two adjacent blades 211 gradually increases, and the direction from the leading edge 2111 of the blade 211 to the trailing edge 2112 thereof intersects with the radial direction of the impeller 21. This vortex shape can also be called a spiral shape. The vortex direction (or spiral direction) can be determined as the direction from the leading edge 2111 of the blade 211 to the trailing edge 2112 thereof, for example Fig. 22 The distance between two connected blades 211 is such that the air outlet of the impeller 21 is divided into a plurality of air outlet gaps. When the impeller 21 rotates, the air flows out in a circular direction through the air outlet, and the air outlet direction of the air outlet is consistent with the vortex direction of the blade 211, for example Fig. 22 The air outlet blows out air in a clockwise direction.

[0122] The flow guide direction of multiple air guide members 3 can be determined as each air guide member 3 pointing from its leading edge to its trailing edge, wherein the leading edge of the air guide member 3 is a side edge of the air guide member 3 close to the rotation axis of the impeller 21, and the trailing edge of the air guide member 3 is a side edge of the air guide member 3 away from the rotation axis. Fig. 22 The flow guiding direction of the multiple flow guiding members 3 is counterclockwise.

[0123] The above technical solution enables the wind blown out of each air outlet 120 to be continuous in the circumferential direction, thus realizing a relatively uniform annular air outlet of the ceiling fan. In addition, the uniformity of the wind blown out of each air outlet 120 also affects the uniformity of the annular air outlet.

[0124] Next, an exemplary description is given of how to improve the uniformity of air blowing from each air outlet 120 .

[0125] In some examples, such as Figure 4 As shown, in the reference plane, the angle between the second air guide portion 32 and the first air guide portion 31 is δ, and δ is an acute angle.

[0126] like Figure 7As shown, δ is set to an acute angle so that part of the wind blown by the fan assembly 2 from the air guide 3 is blown along the second air guide 32 to the part of the air outlet 120 close to the second air guide 32, and the other part is blown along the first air guide 31 to the part of the other air outlet 120 close to the first air guide 31. In this way, for one air outlet 120, the part close to the second air guide 32 and the part close to the first air guide 31 both have a large air volume, so that the air outlet 120 is more uniform. Alternatively, it can also be described as that, since there is an air outlet 120 between the first air guide 31 of one air guide 3 and the second air guide 32 of the adjacent air guide 3, part of the airflow in each air outlet 120 comes from the second air guide 32 of one air guide 3, and the other part comes from the first air guide 31 of another air guide 3. Therefore, the wind blown out at the air outlet 120 is more uniform.

[0127] like Figure 8 As shown, when δ is an obtuse angle, on the one hand, under the premise of not changing the air guiding lengths of the second air guide portion 32 and the first air guide portion 31, δ being an obtuse angle will cause the angle occupied by the portion shielded by the air guide member 3 to be greater than the angle occupied by the second air guide portion 32, resulting in a longer length of the portion shielded by the air guide member 3, making the annular air outlet of the ceiling fan uneven.

[0128] On the other hand, there will be a greater impact between the air outlet of the fan assembly 2 and the first air guide 31, resulting in a greater airflow impact loss and greater wind noise. Since there is an air outlet 120 between the second air guide 32 of the air guide 3 and the first air guide 31 of the adjacent air guide 3, if δ is too large, the air outlet 120 will have more airflow and stronger wind force near the second air guide 32, while the air outlet 120 will have less airflow and weaker wind force near the first air guide 31, resulting in uneven air outlet at the air outlet 120.

[0129] In some examples, such as Figure 4 As shown, 9°<δ<38°. If δ is too small, the connection between the second air guide 32 and the first air guide 31 will not produce an effective fillet radius, making it difficult to process the air guide 3, increasing the complexity and cost of processing the ceiling fan. In addition, the connection between the second air guide 32 and the first air guide 31 will be difficult to guide the airflow, causing the airflow to quickly break away from the connection between the second air guide 32 and the first air guide 31, thereby causing the airflow to generate greater noise.

[0130] In some examples, such as Fig. 9As shown, the angle between the tangent of the head end of the second air guide 32 and the first reference line a is φ, and φ>145°. In this way, the angle between the wind blown out by the fan assembly 2 and the second air guide 32 can be reduced, thereby reducing the impact of the second air guide 32 on the air flow, and further reducing the air flow loss. As a result, the wind force at the outlet 120 near the second air guide 32 is close to the wind force near the first air guide 31, so that the air outlet 120 is more uniform. In addition, the noise generated when the air flow impacts the second air guide 32 can also be reduced.

[0131] In some examples, such as Figure 7 and Fig. 9 As shown, the first air guide portion 31 is arc-shaped, and the concave surface of the first air guide portion 31 faces the second air guide portion 32 of the air guide member 3 which is closest to the first air guide portion 31. In the reference plane, along the rotation direction of the fan assembly 2, the angle between the tangent of the first air guide portion 31 and the radial direction of the annular opening 12 gradually decreases.

[0132] On the one hand, compared with the straight shape of the first air guide portion 31, setting the first air guide portion 31 in an arc shape can increase the length of the first air guide portion 31, thereby increasing the pressurization path of the airflow, which is conducive to increasing the wind pressure. Since the length of the second air guide portion 32 is relatively long, increasing the length of the first air guide portion 31 can reduce the pressure difference between the end of the second air guide portion 32 and the end of the first air guide portion 31, so that the air outlet 120 is more uniform. At the same time, it is also possible to reduce the central angle occupied by the air guide member 3 without reducing the air guide length of the second air guide portion 32, even if the central angle occupied by the air outlet 120 is larger. In this way, the wind blown out of the annular opening 12 can be continuous, that is, the air outlet of the annular opening 12 is relatively uniform.

[0133] On the other hand, the first wind guiding portion 31 can deflect the flow direction of the wind toward the radial direction of the fan assembly 2, so that the airflow has a larger radial component after flowing to the air outlet 120, which is conducive to the airflow blowing to a longer distance.

[0134] In some examples, such as Fig. 9 As shown, assuming that the distance between the head end of the first air guide portion 31 and the central axis of the annular opening 12 is r1, the maximum radius of the impeller 21 of the fan assembly 2 is R, and r1 / R ≥ 1.05. Thus, the head end of the second air guide portion 32 has sufficient air guide space, which is conducive to guiding the airflow to the air outlet 120. In addition, the wind speed of the airflow when it reaches the head end of the second air guide portion 32 can be reduced, thereby reducing the collision strength between the airflow and the head end of the second air guide portion 32, thereby reducing wind noise.

[0135] If r1 is too small, the gap between the head end of the second air guide portion 32 and the edge of the impeller 22 will be small, and the air guide space at the head end of the second air guide portion 32 will be small, making it difficult for the wind blown out of the fan assembly 2 to pass through the air guide 3, making it easy for the airflow to flow back. It will also cause the wind speed of the airflow to be too high when it reaches the head end of the second air guide portion 32, so that the collision intensity between the airflow and the head end of the second air guide portion 32 is large, and thus generating large wind noise.

[0136] In some examples, such as Fig.10 As shown, assuming that the distance between the head end of the second air guide portion 32 and the central axis of the annular opening 12 is r1, the maximum radius of the impeller 21 of the fan assembly 2 is R, and the number of air guides 3 is z, according to simulation and test data, when (0.1+0.01z)R≤r1-R≤0.4R, the noise generated by the ceiling fan is minimal.

[0137] If r1-R is too large, the path of the airflow from the fan assembly 2 to the air guide 3 will be too long. The longer the path, the greater the resistance to the airflow, the greater the energy loss, and the speed of the airflow reaching the annular opening 12 will be too low, thereby affecting the air outlet distance. If r1-R is too small, the distance between the impeller 21 and the air guide 3 will be too close, so that the airflow will have a higher velocity when it reaches the air guide 3, and the collision with the air guide 3 will be more intense, resulting in greater noise.

[0138] It can be seen from the above relationship that r1-R is positively correlated with z, that is, the more the number of air guides 3, the greater the distance between the air guide 3 and the impeller 21. After the airflow flows out of the impeller 21, it will collide with the air guide 3. When the number of air guides 3 is more, the arrangement of the air guides 3 is denser, so that the frequency of the airflow and the air guide 3 collision is high, which will cause the airflow to generate a large noise. In order to reduce the noise of the airflow, when the number z of the air guides 3 increases, r1-R also increases, that is, the distance between the head end of the second air guide 32 and the impeller 21 becomes larger. In this way, the path of the airflow from the impeller 21 to the head end of the second air guide 32 becomes longer, so that the airflow is subject to more resistance, and then the flow rate of the airflow when it reaches the head end of the air guide 3 is reduced. After the airflow velocity is reduced, on the one hand, the lower the airflow velocity, the smaller the wind noise generated. On the other hand, the lower the airflow velocity, the lower the intensity of the airflow when it collides with the air guide 3, thereby reducing the noise generated by the collision between the airflow and the air guide 3. In this way, it can be ensured that after the number of air guide members 3 is increased, the noise generated by the ceiling fan is smaller.

[0139] It can also be seen from the above relationship that r1-R is also positively correlated with R, that is, the larger the diameter of the impeller 21, the larger the distance between the air guide 3 and the impeller 21. When the diameter of the impeller 21 increases, the velocity of the airflow flowing out of the impeller 21 will increase. If the distance between the air guide 3 and the impeller 21 is small at this time, the velocity of the airflow after reaching the air guide 3 is large, so that the collision between the airflow and the air guide 3 is more intense, thereby generating greater noise. Therefore, it is necessary to reduce the velocity of the airflow when it reaches the air guide 3. It can be seen from aerodynamics that the longer the path the airflow passes through, the more resistance it encounters. Therefore, increasing r1-R can reduce the velocity of the airflow when it reaches the air guide 3, thereby reducing the intensity of the airflow when it collides with the air guide 3, thereby reducing the noise generated by the collision between the airflow and the air guide 3.

[0140] In some examples, such as Fig.10 and Fig.11 As shown, the distance between the head end of the second air guide portion 32 and the central axis of the annular opening 12 is r1, the radius of the impeller 21 of the fan assembly 2 is R, and the connection between the second air guide portion 32 and the first air guide portion 31 has a transition surface 33, and the radius of the transition surface 33 is r3. According to simulation and test data, when 0.5(r1-R)≤r3≤2(r1-R), the noise generated by the ceiling fan is minimal.

[0141] If r3 is too small, the transition surface 33 will have difficulty guiding the airflow, causing the airflow to quickly leave the transition surface 33, thereby causing the airflow to generate greater noise. If r3 is too large, the transition surface 33 will generate greater resistance to the airflow, thereby causing greater noise when the airflow collides with the air guide 3.

[0142] It can be seen from the above relationship that r3 is positively correlated with r1-R. When r1-R decreases, it indicates that the distance between the air guide 3 and the fan assembly 2 is closer, so the airflow reaches the air guide 3 at a higher speed after flowing out of the fan assembly 2, making the collision between the airflow and the air guide 3 more intense. If r3 is increased at this time, the transition surface 33 will produce greater resistance to the airflow, thereby further increasing the noise when the airflow collides with the air guide 3. Therefore, r3 should be reduced at this time to reduce wind noise.

[0143] In some examples, such as Fig.11 As shown, the connection between the second air guide portion 32 and the first air guide portion 31 has a transition surface 33. The transition surface 33 has at least two positions with different distances from the central axis of the annular opening 12.

[0144] For example, Figure 12-14As shown, along the direction from the air inlet 11 to the annular opening 12, the distance between the transition surface 33 and the central axis of the annular opening 12 gradually increases, or increases first and then decreases, or decreases first and then increases; or at least part of the distance gradually increases, or increases first and then decreases, or decreases first and then increases. In this way, it is possible to avoid the airflow from colliding with various positions of the transition surface 33 at the same time, thereby reducing the collision intensity between the airflow and the transition surface 33, and further reducing the noise generated by the airflow.

[0145] In some examples, such as Fig. 9 As shown, along the rotation direction of the fan assembly 2, the second wind guide portion 32 sequentially includes a first sub-wind guide surface 321 and a second sub-wind guide surface 322. The second sub-wind guide surface 322 is arc-shaped, and the convex surface of the second sub-wind guide surface 322 faces the fan assembly 2.

[0146] On the one hand, the second sub-wind guide surface 322 can deflect the flow direction of the wind toward the radial direction of the fan assembly 2. As a result, the airflow has a larger radial component after flowing to the air outlet 120, which is conducive to the airflow blowing to a farther distance. And because the concave surface of the first air guide portion 31 faces the second air guide portion 32 of the other air guide member 3, the angle between the first air guide portion 31 and the second sub-wind guide surface 322 of the other air guide member 3 is small. In this way, the angle between the airflow near the second sub-wind guide surface 322 of the air outlet 120 and the airflow near the first air guide portion 31 is small, so that the wind direction at various places of the air outlet 120 is more uniform, thereby improving the uniformity of the air outlet 120.

[0147] On the other hand, the radial deflection of the second sub-air guide surface 322 toward the fan assembly 2 can reduce the central angle of the air guide member 3 without reducing the air guide length of the second air guide portion 32, even if the central angle of the air outlet 120 is larger. In this way, the wind blown out of the annular opening 12 can be continuous, that is, the air outlet of the annular opening 12 is more uniform.

[0148] In some examples, such as Fig. 9 As shown, in the reference plane, let the angle between the tangent of the end of the second sub-air guide surface 322 and the line connecting the end of the second sub-air guide surface 322 and the central axis of the annular opening 12 be ω, then 0°<ω<20°. In this way, the angle between the wind direction at the end of the second sub-air guide surface 322 and the radial direction of the annular opening 12 can be made smaller, which is beneficial to increase the radial air supply distance of the ceiling fan. At the same time, the wind direction at the end of the second sub-air guide surface 322 can be made close to the wind direction at the end of the first air guide portion 31, so that the air outlet 120 can be more uniform.

[0149] In some examples, such as Fig. 9As shown, the first sub-wind guiding surface 321 and the second sub-wind guiding surface 322 are tangent at the connection, so that the airflow can flow smoothly from the first sub-wind guiding surface 411 to the second sub-wind guiding surface 322, thereby reducing airflow loss. It can also prevent the airflow from leaving the first sub-wind guiding surface 321 too quickly, thereby reducing the noise generated by the airflow.

[0150] In some examples, the concave surface of the first sub-air guiding surface 321 faces the fan assembly 2 , which is beneficial for gathering the airflow and guiding the airflow to the second sub-air guiding surface 322 .

[0151] In some examples, such as Fig. 9 As shown, assuming that the distance between the end of the first sub-wind guide surface 321 and the axis of the fan assembly 2 is r2, and 1.015<r2 / r1<1.2, it is beneficial for the first sub-wind guide surface 321 to gather the airflow, and it is also beneficial for the first sub-wind guide surface 321 to guide the airflow to the second sub-wind guide surface 322. If r2 / r1 is too small (such as r2 / r1<1), the first sub-wind guide surface 321 will cause a large resistance to the airflow, thereby causing airflow loss, and causing a large noise when the airflow hits the first sub-wind guide surface 321. If r2 / r1 is too large, the angle of the first sub-wind guide surface 321 will change too quickly, so that the airflow is easy to leave the first sub-wind guide surface 321, and a large noise is generated due to the airflow.

[0152] In some examples, such as Fig. 9 As shown, in the reference plane, the line between the end of the first sub-wind guiding surface 321 and the central axis of the annular opening 12 is the fourth reference line d, and the angle between the third reference line b and the fourth reference line d is β, and β<α.

[0153] If β>α, the length of the second wind-guiding sub-surface 322 will increase, so that the impact between the airflow and the second wind-guiding sub-surface 322 is greater, so that the wind blown out by the fan assembly 2 encounters greater resistance, thereby increasing the load of the fan assembly 2.

[0154] In some examples, such as Figure 5 The housing 1 comprises an outer shell 101 and an inner shell 102, wherein the outer shell 101 surrounds the inner shell 102. The top of the outer shell 101 has an air inlet 11, and an annular opening 12 is formed between the bottom of the outer shell 101 and the bottom of the inner shell 102. The air guide 3 is connected to the inner wall of the outer shell 101.

[0155] In some examples, the air inlet 11 may also be located at a side of the outer shell 101 , or at the bottom of the inner shell 102 .

[0156] In some examples, such as Figure 4 As shown, the top of the air guide member 3 abuts against the outer shell 101, and / or the bottom of the air guide member 3 abuts against the inner shell 102, and along the air outlet direction, as shown in FIG. Figure 5As shown, the size of the air guide 3 in the vertical direction gradually decreases. Therefore, the distance between the outer shell 101, the inner shell 102 and the air guide 3 that abut against each other also decreases. Since the total amount of air discharged by the fan assembly 2 remains unchanged, and the distance between the outer shell 101 and the inner shell 102 gradually decreases along the air flow direction, the air pressure of the air flow will gradually increase, thereby increasing the air supply distance of the fan.

[0157] In some examples, such as Figure 5 As shown, the outer shell 101 includes a first arc-shaped portion 1011, and the inner shell 102 includes a second arc-shaped portion 1021. The concave surface of the first arc-shaped portion 1011 faces the convex surface of the second arc-shaped portion 1021, and a plurality of air guides 3 are located between the first arc-shaped portion 1011 and the second arc-shaped portion 1021. In this way, the airflow blown out by the fan assembly 2 can flow along the arc, so that the airflow flows more smoothly, avoiding airflow loss caused by a sudden change in the direction of the airflow.

[0158] In some examples, such as Figure 5 As shown, the top and bottom of the air guide 3 are both arc-shaped, and fit with the first arc-shaped portion 1011 and the second arc-shaped portion 1021 respectively. Among them, the angle between the top of the air guide 3, and / or the bottom of the air guide 3 and the horizontal plane gradually increases along the air outlet direction. Since the fan assembly 2 blows out the guide wind in the horizontal direction, and the ceiling fan needs to blow downward, the angle between the bottom of the air guide 3 and the horizontal plane gradually increases along the air outlet direction, which can gradually guide the airflow to the vertical direction.

[0159] In some examples, such as Figure 5 As shown, the maximum dimension of the air guide member 3 in the vertical direction is d1, the width of the air outlet 120 is d2, and 2.5<d1 / d2<7. <d1 / d2<6。

[0160] Since the diameter of the outer shell 101 and the diameter of the inner shell 102 are larger than the diameter of the fan assembly 2, if d1 / d2 is too small, it may still cause the ventilation area of ​​the annular opening 12 (the ventilation area between the end of the first arc portion 1011 and the end of the second arc portion 1021) to be larger than the ventilation area of ​​the edge of the fan assembly 2, thereby causing the flow velocity of the airflow in the air duct to gradually decrease, causing the airflow to easily generate vortices in the air duct, resulting in a shorter air supply distance of the annular opening 12.

[0161] If d1 / d2 is too large, although the ventilation area of ​​the annular opening 12 will be smaller than the ventilation area of ​​the edge of the fan assembly 2, the ventilation area of ​​the annular opening 12 will hinder the airflow, making the air output at the annular opening 12 too small, which is not conducive to increasing the air supply distance and will also generate greater noise.

[0162] In some examples, the connection between the second air guide portion 32 and the first air guide portion 31 has a transition surface 33, and the transition surface 33 has different radii at at least two positions, so that the airflow does not collide with the entire second air guide portion 32 at the same time, thereby reducing the collision intensity between the airflow and the second air guide portion 32, and further reducing the noise generated by the airflow.

[0163] Exemplarily, along the direction from the air inlet 11 to the annular opening 12 , the radius of the transition surface 33 gradually decreases.

[0164] In some examples, the transition surface 33 is a chamfer between the second air guide portion 32 and the first air guide portion 31, and the radius of the transition surface 33 refers to the chamfer radius. Along the direction from the air inlet 11 to the annular opening 12, the radius of the transition surface 33 gradually increases or gradually decreases, or at least partially increases or at least partially decreases.

[0165] In this way, on the one hand, along the direction close to the air inlet 11, the distance r1 between the head end of the second air guide 32 and the central axis of the annular opening 12 will gradually increase, so that the airflow will not collide with the entire second air guide 32 at the same time, but first collide with the end of the second air guide 32 away from the annular opening 12, and then collide with the end of the second air guide 32 close to the annular opening 12, thereby reducing the collision strength between the airflow and the second air guide 32, and further reducing the noise generated by the airflow. Correspondingly, along the direction away from the bottom of the air guide 3, the distance between the head end of the first air guide 31 and the central axis of the annular opening 12 will gradually decrease, so that the airflow will not collide with the entire first air guide 31 at the same time, but first collide with the end of the first air guide 31 close to the annular opening 12, and then collide with the end of the first air guide 31 away from the annular opening 12, thereby reducing the collision strength between the airflow and the first air guide 31, and further reducing the noise generated by the airflow.

[0166] On the other hand, when the air guide 3 and the housing 101 are integrally injection molded, Fig.16 As shown, the air guide 3 and the housing 101 are formed between the upper mold 100 and the lower mold 200. The upper mold 100 is located on the outside of the housing 101, and the lower mold 200 is located on the inside of the housing 101. After the air guide 3 and the housing 101 are formed, the upper mold 100 and the lower mold 200 need to be pulled out.

[0167] like Fig.16 As shown, when pulling out the film, the upper mold 100 needs to be pulled out along the first direction, wherein the first direction is the direction in which the housing 101 gradually approaches the air inlet 11 along the axial direction. A protrusion 1001 is formed at the position of the inner side of the upper mold 100 opposite to the air guide 3, and the protrusion 1001 is located on the inner side of the outer surface of the air guide 3. Fig.17As shown in FIG. 1 , if the radius r3 of the transition surface 33 gradually decreases in the direction close to the air inlet 11, the distance between the second air guide portion 32 and the first air guide portion 31 of the air guide member 3 will gradually decrease in the first direction. In this way, when the upper mold 100 is pulled out, the protrusion 1001 will be blocked by the second air guide portion 32 and the first air guide portion 31, and thus cannot be demolded. Fig.18 As shown, the radius r3 of the transition surface 33 gradually increases in the direction close to the air inlet 11, and the distance between the second air guide portion 32 and the first air guide portion 31 of the air guide member 3 gradually increases in the first direction. In this way, during the demoulding process, the protrusion 1001 can be smoothly pulled out from the second air guide portion 32 and the first air guide portion 31.

[0168] like Fig.16 As shown, when pulling out the film, the lower mold 200 needs to be pulled out along the second direction, wherein the second direction is the direction in which the housing 101 gradually moves away from the air inlet 11 along the axial direction. A groove 2001 is formed at the position where the lower mold 200 is opposite to the air guide 3, and the groove 2001 is located on the outer side of the inner surface of the air guide 3. Fig.19 As shown, if the radius r3 of the transition surface 33 gradually decreases in the direction close to the air inlet 11, the distance between the second air guide portion 32 and the first air guide portion 31 of the air guide member 3 will gradually increase in the second direction. In this way, when the lower mold 200 is pulled out, the groove 2001 will be blocked by the second air guide portion 32 and the first air guide portion 31, and thus cannot be demolded. Fig. 20 As shown, the radius r3 of the transition surface 33 gradually increases in the direction close to the air inlet 11, and the distance between the second air guide portion 32 and the first air guide portion 31 of the air guide member 3 gradually decreases in the second direction. In this way, during the demoulding process, the protrusion 1001 can be smoothly pulled out from the second air guide portion 32 and the first air guide portion 31.

[0169] Of course, in other examples, the air guide 3 may also be an integral structure with the inner shell 102. Alternatively, the air guide 3 is a separate part connected to the outer shell 101 and the inner shell 102 through a connecting component.

[0170] In some examples, such as Figure 5 As shown, the inner shell 102 is connected to the bottom of the air guide 3, thereby realizing the connection between the inner shell 102 and the outer shell 101. Since the airflow generated by the fan assembly 2 does not flow out from the position where the air guide 3 is opposite to the annular opening 12, the connecting parts (such as bolts and screws, etc.) are arranged at the bottom of the air guide 3, so as not to hinder the flow of the airflow.

[0171] In some examples, the outer wall surface of the housing 101 is covered with sound-absorbing cotton to reduce the noise generated by the flow of air.

[0172] It should be noted that, in some embodiments, the concave surface, convex surface, etc. referred to in the article refer to the general direction of the surface. In other embodiments, the concave surface may also be provided with a partial convex surface for other effects.

[0173] The disclosed embodiment further provides a fan lamp, which includes the ceiling fan and a lamp module 4 , wherein the lamp module 4 is disposed at the bottom of the housing 1 of the ceiling fan.

[0174] In some examples, such as Fig.15 As shown, the fan lamp further comprises a cover shell 5, and the cover shell 5 surrounds the outer shell 101. The cover shell 5 has an air suction port 51, and the air suction port 51 is opposite to the air inlet 11.

[0175] In some examples, such as Figure 1 and Figure 5 As shown, the inner shell 102 has a receiving groove. The lamp module 4 can directly set the lamp source in the receiving groove, and the inner shell 102 can be regarded as a mounting base for the lamp source. Alternatively, the lamp module 4 is an integral component and is detachably connected to the bottom of the inner shell 102.

[0176] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A ceiling fan, characterized in that: The ceiling fan comprises a housing (1), a fan assembly (2) and a plurality of air guides (3); The housing (1) has an air inlet (11) and a circular opening (12) at the bottom; The fan assembly (2) is located inside the housing (1), the plurality of air guides (3) surround the fan assembly (2), the air guides (3) have a first air guide portion (31), and the end of the first air guide portion (31) is connected to the housing (1); Wherein, in a reference plane perpendicular to the central axis of the annular opening (12), a line connecting the head end of the first air guide portion (31) and the central axis of the annular opening (12) is set as a first reference line (a), and a line connecting the end of the first air guide portion (31) and the central axis of the annular opening (12) is set as a second reference line (c), and the second reference line (c) and the first reference line (a) are arranged in sequence in a circumferential direction along the rotation direction of the fan assembly (2), and the first air guide portion (31) is arc-shaped, and the concave surface of the first air guide portion (31) faces away from the fan assembly (2).

2. The ceiling fan according to claim 1, characterized in that: The fan assembly (2) comprises an impeller (21), the impeller (21) comprises a plurality of blades (211), and the plurality of blades (211) are arranged in a ring shape and surround the air inlet (11); In a reference plane perpendicular to the central axis of the annular opening (12), a line between the end of the blade (211) and the central axis of the impeller (21) is assumed to be a fifth reference line (m), a straight line passing through the end of the blade (211) and perpendicular to the fifth reference line (m) is assumed to be a sixth reference line (n), an obtuse angle formed between the sixth reference line (n) and a line between the head end and the end of the blade (211) is assumed to be λ1, a line between the head end of the first air guide portion (31) and the central axis of the impeller (21) is assumed to be a seventh reference line (p), a straight line at the head end of the first air guide portion (31) and perpendicular to the seventh reference line (p) is assumed to be an eighth reference line (q), an acute angle formed between the eighth reference line (q) and a tangent line at the head end of the first air guide portion (31) is assumed to be λ2, then λ1-90°≤λ2≤λ1-80°.

3. The ceiling fan according to claim 2, characterized in that A line connecting the end of the first air guide portion (31) and the central axis of the impeller (21) is a ninth reference line (e), a straight line passing through the end of the first air guide portion (31) and perpendicular to the ninth reference line (e) is a tenth reference line (f), an acute angle formed between the tenth reference line (f) and a tangent line at the end of the first air guide portion (31) is λ3, and λ2+20°≤λ3≤λ2+40°.

4. The ceiling fan according to claim 1, characterized in that: The fan assembly (2) comprises an impeller (21), the impeller (21) comprises a plurality of blades (211), and the plurality of blades (211) are arranged in a ring shape and surround the air inlet (11); The leading edge (2111) of the blade (211) has a forward convex structure (2111a), the forward convex structure (2111a) is located between the top and bottom of the leading edge (2111), and the forward convex structure (2111a) protrudes in the direction close to the air inlet (11). Wherein, the leading edge (2111) is the edge of the blade (211) close to the air inlet (11); The height of the top of the leading end of the first air guiding part (31) is lower than the height of the forward convex structure (2111a).

5. The ceiling fan according to claim 4, characterized in that: Let the height of the trailing edge (2112) of the blade (211) be H1, and the height difference between the top of the leading end of the first air guiding part (31) and the forward convex structure (2111a) be H2, then 0 < H2 ≤ 0.2H1. Wherein, the trailing edge (2112) is opposite to the leading edge (2111).

6. The ceiling fan according to claim 4, characterized in that: The height of the bottom of the leading end of the first air guiding part (31) is higher than the height of the bottom of the trailing end of the first air guiding part (31); and / or, The height of the bottom of the leading end of the first air guiding part (31) is lower than the height of the impeller (21) at the central axis of the annular opening (12).

7. The ceiling fan according to claim 1, characterized in that: Along the direction from the air inlet (11) to the annular opening (12), the distance between the leading end of the first air guiding part (31) and the central axis of the annular opening (12) gradually increases or gradually decreases.

8. The ceiling fan according to claim 4, characterized in that The distance between the top of the leading end of the first air guiding part (31) and the central axis of the annular opening (12) is L1, the distance between the bottom of the leading end of the first air guiding part (31) and the central axis of the annular opening (12) is L2, and the maximum radius of the impeller (21) is R, then L2 > L1, 0.05(L2 - R) ≤ L2 - L1 ≤ 0.2(L2 - R).

9. The ceiling fan according to claim 1, characterized in that: In the reference plane, let the included angle between the tangent line of the trailing end of the first air guiding part (31) and the connecting line between the trailing end of the first air guiding part (31) and the central axis of the annular opening (12) be ε, then 0° < ε < 20°.

10. The ceiling fan according to claim 1, characterized in that: The air guiding member (3) further includes a second air guiding part (32), the leading end of the second air guiding part (32) is connected to the leading end of the first air guiding part (31), and the second air guiding part (32) faces the fan assembly (2); Wherein, in a reference plane perpendicular to the central axis of the annular opening (12), let the connecting line between the trailing end of the second air guiding part (32) and the central axis of the annular opening (12) be the third reference line (b), then the second reference line (c) is located between the first reference line (a) and the third reference line (b).

11. The ceiling fan according to claim 10, characterized in that The included angle between the third reference line (b) and the second reference line (c) is α, then 20° < α < 30°.

12. The ceiling fan according to claim 10, characterized in that: In the reference plane, let the included angle between the first reference line (a) and the second reference line (c) be γ, then 0° < γ < 15°.

13. The ceiling fan according to claim 10, characterized in that: In the reference plane, let the included angle between the first air guiding part (31) and the second air guiding part (32) at the connection be δ, then δ is an acute angle.

14. The ceiling fan according to claim 13, characterized in that: 9° < δ < 38°.

15. The ceiling fan according to claim 10, characterized in that: Assume that the angle between the tangent line of the head end of the second air guide portion (32) and the first reference line (a) is but 16. The ceiling fan according to claim 10, characterized in that: In the reference plane, assuming that the distance between the head end of the first air guide portion (31) and the central axis of the annular opening (12) is r1, the maximum radius of the impeller (21) of the fan assembly (2) is R, and the number of the air guide members (3) is z, then (0.1+0.01z)R≤r1-R≤0.4R.

17. The ceiling fan according to claim 10, characterized in that: A transition surface (33) is provided at a connection between the second air guide portion (32) and the first air guide portion (31); In the reference plane, assuming that the distance between the head end of the second air guide portion (32) and the central axis of the annular opening (12) is r1, the maximum radius of the impeller (21) of the fan assembly (2) is R, and the radius of the transition surface (33) is r3, then 0.5(r1-R)≤r3≤2(r1-R).

18. The ceiling fan according to claim 10, characterized in that: A transition surface (33) is provided at a connection between the second air guide portion (32) and the first air guide portion (31); The transition surface (33) has at least two positions with different distances from the center axis of the annular opening (12).

19. The ceiling fan according to claim 10, characterized in that: A transition surface (33) is provided at a connection between the second air guide portion (32) and the first air guide portion (31); Along the direction from the air inlet (11) to the annular opening (12), the distance between the transition surface (33) and the central axis of the annular opening (12) gradually increases, or gradually decreases, or first increases and then decreases, or first decreases and then increases.

20. The ceiling fan according to claim 10, characterized in that: Along the rotation direction of the fan assembly (2), the second wind guide portion (32) sequentially comprises a first sub-wind guide surface (321) and a second sub-wind guide surface (322); The second sub-wind guiding surface (322) is arc-shaped, and the convex surface of the second sub-wind guiding surface (322) faces the fan assembly (2).

21. The ceiling fan according to claim 20, characterized in that: In the reference plane, assuming that the angle between the tangent of the end of the second sub-wind guiding surface (322) and the line connecting the end of the second sub-wind guiding surface (322) and the central axis of the annular opening (12) is ω, then 0°<ω<20°.

22. The ceiling fan according to claim 10, characterized in that: The housing (1) comprises an outer shell (101) and an inner shell (102), wherein the outer shell (101) surrounds the inner shell (102); The outer shell (101) has an air inlet (11), and the annular opening (12) is formed between the bottom of the outer shell (101) and the bottom of the inner shell (102); The air guide member (3) is connected to the inner wall of the outer shell (101).

23. The ceiling fan according to claim 10, characterized in that: A transition surface (33) is provided at a connection between the second air guide portion (32) and the first air guide portion (31); The transition surface (33) has different radii at at least two locations.

24. The ceiling fan according to claim 23, characterized in that: Along the direction from the air inlet (11) to the annular opening (12), the radius of the transition surface (33) gradually decreases.

25. A fan light, characterized in that: The fan lamp comprises a ceiling fan and lamp module (4) as described in any one of claims 1 to 22; The lamp module (4) is arranged at the bottom of the housing (1) of the ceiling fan.

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