fan

Abstract

A fan comprising a head assembly (2), a holder assembly (3), and a bracket assembly (1), wherein the holder assembly (3) can rotate the bracket assembly (1) about a first axis extending along a first direction (F1), the head assembly (2) includes a shell portion, both of which are exhaust ports (203) and first intake ports (201) located at both ends of the shell portion in a second direction (F2), and the second intake port (202) is located in the side wall of the shell portion. 21) The bracket assembly (1) includes a connecting wall (12) and two hinged parts (11), and the holder assembly (3) is connected to the bracket assembly (1) via the connecting wall (12), and the two hinged parts (11) are hinged to each end of the shell in a third direction (F3), thereby driving the bracket assembly (1) to rotate the shell around a second axis extending along the third direction (F3). The fan improves the rotational stability of the head assembly and improves the uniformity of the intake air of the head assembly.

Description

Technical Field

[0001] <Cross - reference to Related Applications> This disclosure claims the priority of a Chinese patent application with the application number 202410521401.5 and the title "Fan", which was filed with the China National Intellectual Property Administration on April 28, 2024, and all of its content is incorporated herein by reference. This disclosure relates to the technical field of fans, and particularly to fans.

Background Art

[0002] In current mainstream circulation fans, usually, the support bracket 02 is attached to the rear of the fan head 01, and the rear structure is used to swing the fan head up and down. The advantage of such a structure is that the support bracket 02 does not occupy the space of the head. When the size of the head remains unchanged, the device can select blades with a larger diameter, ensuring the performance of the product, the structure of the head is completely unified, and the appearance is relatively good.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, as shown in Figure 1, in the structure where the support bracket 02 is attached to the rear of the fan head 01, when the fan swings up and down, since the connection point between the support bracket 02 and the fan head 01 is located behind the fan head 01, both the distance between the head and the center of gravity of the up - and - down rotation (i.e., the D1 value shown in Figure 1) and the distance between the center of rotation of the left - and - right swinging and the farthest end of the motor head (i.e., the D2 value shown in Figure 1) become large, increasing the load on the motor, not only generating abnormal noise over a long period but also affecting the motor life. Also, since the back of the fan head 01 is blocked by the structure of some support brackets 02, the intake of air at the back becomes uneven, increasing the operating noise of the device and disrupting the balance of the head.

Means for Solving the Problems

[0004] Embodiments of the present disclosure provide a fan comprising a head assembly, a holder assembly, and a bracket assembly, wherein the holder assembly extends along a first direction, the bracket assembly is provided at one end of the holder assembly in the first direction, and the holder assembly is arranged to rotate the bracket assembly around a first axis extending along the first direction. The head assembly includes a shell portion, the shell portion is provided with an exhaust port, a first intake port and a second intake port, both the exhaust port and the first intake port are provided at both ends of the shell portion in a second direction, the second intake port is provided on the side wall of the shell portion, the second direction intersects the first direction, The bracket assembly includes a connecting wall and two hinge portions, the holder assembly is connected to the bracket assembly via the connecting wall, and the two hinge portions are hinged to both ends of the shell portion in a third direction, thereby driving the bracket assembly to rotate the shell portion around a second axis extending in the third direction. The connecting wall includes a third air intake port provided opposite the second air intake port.

[0005] In one or more embodiments, the shell portion includes a first cover, a second cover, and the side wall, and a main duct is provided within the side wall, penetrating the side wall along the second direction. The first cover and the second cover each cover both ends of the main duct in the second direction, the exhaust port is provided in the first cover, and the first intake port is provided in the second cover. The side wall includes an air collection area and an air intake area arranged sequentially along the second direction, one end of the side wall where the air collection area is located is connected to the first cover, and the second air intake ports are both located within the air intake area.

[0006] In one or more embodiments, the hinge portion is provided at the boundary between the air collection area and the air intake area.

[0007] In one or more embodiments, the hinge portion is provided on the side of the connecting wall closer to the air collection area in the second direction, The connecting wall is provided on the outside of the intake region.

[0008] In one or more embodiments, the head assembly further includes a vane section and a rotating section, each provided within the main duct, the rotating section having a rotation axis extending along the second direction, and both the rotating section and the vane section are provided coaxially via the rotation axis and driven to rotate the vane section about the rotation axis. The blade portion includes a connecting portion and a plurality of blades uniformly distributed in the circumferential direction of the connecting portion.

[0009] In one or more embodiments, the connecting portion is ductilely connected to one end of the rotating shaft near the first cover, and the blades extend from the connecting portion outward and toward the side where the second cover is located. In the second direction, an intake gap is provided between one end of the blade away from the connection portion and the second cover.

[0010] In one or more embodiments, in the second direction, the dimensions of the intake gap are 4-6% of the dimensions of the main duct.

[0011] In one or more embodiments, the second intake port extends along the second direction from one end to the other of the intake region, At least a portion of the blade extends into the intake region, In the second direction, the portion of the blade that extends to the intake region accounts for 40%-50% of the dimensions of the intake region.

[0012] In one or more embodiments, an arrangement groove is provided on the outside of the side wall, and the connecting wall is provided within the arrangement groove such that the outer surfaces of both the connecting wall and the side wall are aligned with each other.

[0013] In one or more embodiments, the side of the arrangement groove away from the exhaust port is open, In the circumferential direction of the side wall, the span of the arrangement groove is greater than the span of the bracket assembly, and both ends of the arrangement groove in the circumferential direction of the side wall extend beyond both ends of the bracket assembly in the circumferential direction of the side wall.

[0014] In one or more embodiments, the arrangement groove includes position limiting ribs provided at both ends of the arrangement groove in the circumferential direction of the side wall, The position limiting rib is positioned so as to be in close contact with the outer edge of the connecting wall when the head assembly rotates to its limit angle about the second axis.

[0015] In one or more embodiments, a relief chamfer is provided at one end of the arrangement groove away from the exhaust port, In the second direction, the dimensions of the relief chamfer account for 8%-10% of the dimensions of the main duct. The aforementioned relief chamfer is 12°-24°.

[0016] In one or more embodiments, in the second direction, the inner surface of the connecting wall is gradually inclined outward from one side of the connecting wall facing the first air intake to the other side.

[0017] In one or more embodiments, the angle between the inner surface of the connecting wall and the second direction is 8°-20°.

[0018] In one or more embodiments, the region of the connecting wall in which the third air intake is provided is defined as a ventilation region, the other portion of the connecting wall is defined as a reinforcement region, and the thickness of the reinforcement region is greater than that of the ventilation region.

[0019] In one or more embodiments, the connecting wall includes a support rack and a cover plate, The holder assembly is provided at the central part of the support rack, and the hinge part is fixedly provided at both ends of the support rack. The support rack includes a through groove penetrating the support rack, and the third air inlet is provided on the cover plate. The cover plate is arranged to be engageable with a portion of the support rack interposed between the holder assembly and the hinge part such that the ventilation area of the cover plate faces the through groove.

[0020] In one or more embodiments, a hinge shaft extending along the third direction is provided outside the side wall, and the hinge part is connected to the side wall via the hinge shaft.

[0021] In one or more embodiments, a wind guiding chamfer is provided on the support rack, and the wind guiding chamfer is provided surrounding the edge of the through groove.

[0022] In one or more embodiments, the holder assembly includes a support rod base and a rotating base. The support rod base extends along the first direction, and the rotating base is provided at one end of the support rod base in the first direction. The holder assembly is connected to the bracket assembly via the rotating base to drive the holder assembly to rotate about the support rod base.

[0023] In one or more embodiments, a clearance for preventing interference is formed between the side wall and the connecting wall, and the clearance for preventing interference is 3 - 8 mm.

[0024] To more clearly and easily understand the above objects, features and advantages of the present disclosure, the following preferred embodiments will be described in detail with reference to the accompanying drawings.

Brief Description of the Drawings

[0025] To more clearly illustrate specific embodiments of the present disclosure or technical concepts in the prior art, the following briefly introduces the drawings that may be used to describe specific embodiments or the prior art. The drawings in the following description represent some embodiments of the present disclosure, and it will be apparent to those skilled in the art that other drawings can be derived from these drawings without any creative effort. [Figure 1] This is a schematic diagram of the structure of a conventional fan. [Figure 2] This is a schematic diagram of the side structure of the fan according to the embodiment of this disclosure when it is in its initial position. [Figure 3] This is a schematic side view of the fan according to the embodiment of the present disclosure when it is rotated 45° around the second axis. [Figure 4] This is a schematic side view of the fan according to the embodiment of the present disclosure when it has rotated to its limit position around the second axis. [Figure 5] This is a schematic diagram of the exploded structure of a fan according to an embodiment of the present disclosure. [Figure 6] This is a schematic cross-sectional view obtained by cutting the fan assembly according to an embodiment of the present disclosure along a plane defined along both the first and second directions. [Figure 7] This is a schematic diagram of the axial structure of a bracket assembly according to an embodiment of the present disclosure. [Figure 8] This is a schematic diagram of the exploded structure of a bracket assembly according to an embodiment of the present disclosure. [Figure 9] This is a schematic cross-sectional view obtained by cutting a bracket assembly according to an embodiment of the present disclosure along a plane defined along both the first and second directions. [Modes for carrying out the invention]

[0026] The technical proposal of this disclosure will be described clearly and completely below with reference to the drawings, and it should be noted that the described embodiments are only some, and not all, embodiments of this disclosure.

[0027] Typically, assemblies of embodiments of the present disclosure, as illustrated in the accompanying drawings, can be installed and designed in a variety of configurations. Therefore, the following detailed description of embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure for which protection is claimed, but rather illustrates only preferred embodiments of the present disclosure.

[0028] All other embodiments obtained by a person skilled in the art without creative work based on the embodiments in this disclosure are all within the scope of protection of this disclosure.

[0029] Furthermore, in the description of this disclosure, directions or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are merely for the convenience and simplification of the description of this disclosure. They do not indicate or imply that the shown devices or elements have a specific direction or must be configured and operated in a specific direction, and should not be understood as limitations on this disclosure. In addition, the terms "first," "second," and "third" are merely for illustrative purposes and should not be understood as indicating or implying relative importance.

[0030] In this disclosure, unless otherwise specifically defined and limited, the terms “attachment,” “communication,” and “connection” should be understood in a broad sense, for example, that they may be fixed connections, removable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, or internal communication between two elements. A person skilled in the art will be able to understand the specific meaning of the above terms in this disclosure depending on the specific circumstances.

[0031] The fan according to the embodiment of this disclosure solves to some extent the technical problems of the prior art, namely, the distance between the head and the vertical rotation center of gravity (i.e., the D1 value shown in Figure 1) and the distance between the rotation center of left-right oscillation and the furthest end of the motor head (i.e., the D2 value shown in Figure 1) are both large, increasing the load on the motor, which not only generates abnormal noise over a long period of time but also affects the motor's lifespan, and because the back of the fan head is obstructed by a part of the bracket structure, the intake air from the back becomes uneven, increasing the operating noise of the equipment and disrupting the balance of the head.

[0032] In the fan according to the embodiment of this disclosure, hinge portions are provided at both ends of the connecting wall, and these two hinge portions are hinge-connected to both ends of the shell portion in the third direction. Compared to the prior art structure (shown in Figure 1) in which a support bracket 02 is provided on the fan head 01, the fan according to this disclosure can effectively shorten the distance between the second axis and the edge of the head assembly, as well as effectively shorten the distance from the second axis to the edge of the head assembly. That is, the rotational radius of the head assembly around the first axis and the rotational radius of the head assembly around the second axis can be effectively shortened, thereby effectively improving the rotational stability of the head assembly, reducing the probability of abnormal noise occurring during rotation, and effectively improving the lifespan of the drive structure (e.g., motor) that rotates the head assembly. On the other hand, by providing the connection point between the holder assembly and the head assembly on the side wall of the shell, the shielding of the first air intake port by the holder assembly can be effectively avoided. Furthermore, by providing a third air intake port on the connection wall opposite the second air intake port, uniformity of air intake in the circumferential direction of the head assembly can be effectively ensured. In this way, the uniformity of air intake in the head assembly is greatly improved, and the probability of abnormal noise generation during fan operation due to uneven air intake is effectively reduced, further improving the stability of head assembly operation.

[0033] Hereinafter, fans relating to several embodiments of this disclosure will be described with reference to Figures 2-8.

[0034] As shown in Figures 2-8, embodiments of the present disclosure include a head assembly 2, a holder assembly 3, and a bracket assembly 1, wherein the holder assembly 3 extends along a first direction F1, and the bracket assembly 1 is provided at one end of the holder assembly 3 in the first direction F1, and the holder assembly 3 provides a fan that can rotate the bracket assembly 1 around a first axis extending along the first direction F1. The head assembly 2 includes a shell portion, the shell portion is provided with an exhaust port 203, a first intake port 201, and a second intake port 202, both of which are provided at both ends of the shell portion in a second direction F2, the second intake port 202 is provided on the side wall 21 of the shell portion, and the second direction F2 intersects the first direction F1. The bracket assembly 1 includes a connecting wall 12 and two hinged parts 11. The holder assembly 3 is connected to the bracket assembly 1 via the connecting wall 12, and the two hinged parts 11 are hinged to both ends of the shell in a third direction F3, thereby allowing the bracket assembly 1 to rotate the shell around a second axis extending along the third direction F3. The connecting wall 12 includes a third air intake 204, which can be positioned opposite the second air intake 202.

[0035] According to the fan with the above technical features, hinge portions 11 are provided at both ends of the connecting wall 12, and these two hinge portions 11 are hinge-connected to both ends of the shell portion in the third direction F3. Compared to the conventional structure (shown in Figure 1) in which a support bracket 02 is provided on the fan head 01, the fan according to this disclosure can effectively shorten the distance between the second axis and the edge of the head assembly 2, and can effectively shorten the rotation radius of the head assembly 2 when it rotates around the first axis and when it rotates around the second axis. Furthermore, it can effectively improve the rotational stability of the head assembly 2, reduce the probability of abnormal noise occurring during rotation, and effectively improve the lifespan of the drive structure (e.g., motor) that rotates the head assembly 2. On the other hand, by providing the connection point between the bracket assembly 1 and the head assembly 2 on the side wall 21 of the shell portion, the shielding of the first air intake port 201 by the bracket assembly 1 can be effectively avoided. Furthermore, by providing a third air intake port on the connection wall 12 opposite the second air intake port 202, uniformity of air intake in the circumferential direction of the head assembly 2 can be effectively ensured. In this way, the uniformity of air intake of the head assembly 2 is greatly improved, and the probability of abnormal noise generation during fan operation due to uneven air intake is effectively reduced, further improving the operational stability of the head assembly 2.

[0036] As shown in Figures 2-8, F1 in the figures represents an example of the first direction F1, F2 in the figures represents an example of the second direction F2, and F3 in the figures represents an example of the third direction F3. In some embodiments, the third direction F3 is perpendicular to the second direction F2, ensuring smooth rotation of the head assembly 2 around the second axis.

[0037] In some embodiments, the holder assembly 3 may include a support rod base 31 and a rotating base 32. The support rod base 31 may extend along a first direction F1, and the rotating base 32 may be provided at one end of the support rod base 31 in the first direction F1, and the holder assembly 3 is connected to the holder assembly 1 via the rotating base 32, thereby rotating the holder assembly 3 about the support rod base 31 as an axis, in other words, the first axis may be the axis of the support rod base 31.

[0038] Preferably, the rotating base 32 may be a first rotating motor.

[0039] In some embodiments, as shown in Figure 5, the shell portion may include a first cover 22, a second cover 23, and a side wall 21, and a main duct is provided within the side wall 21, penetrating the side wall 21 along a second direction F2. The first cover 22 and the second cover 23 are each placed over both ends of the main duct in the second direction F2, and secure a stable space formed within the shell portion for arranging the blade portion 24, which will be described later, thereby ensuring the safety of fan operation and preventing the blade portion 24 from injuring a person during fan operation.

[0040] Correspondingly, as shown in Figure 2, the exhaust port 203 may be provided on the first cover 22, and the first intake port 201 may be provided on the second cover 23. Note that the distribution patterns of the exhaust port 203 and the first intake port 201 in the first cover 22 and the second cover 23 are similar to those of conventional fans, so a detailed explanation is omitted here.

[0041] In some embodiments, as shown in Figure 2, the side wall 21 includes a concentrating region 211 and an intake region 212 arranged sequentially along a second direction F2, with one end of the side wall 21 where the concentrating region 211 is located connected to a first cover 22, and the second intake port 202 is located within the intake region 212. In this way, the partial airflow entering the main duct through the first intake port 201 and the second intake port 202 can flow along the second direction F2 to the exhaust port 203 due to the converging action of the side wall 21 of the concentrating region 211, effectively ensuring the smooth flow of air to the exhaust port 203 and effectively avoiding the phenomenon of the airflow entering the main duct from the second intake port 202 forming a vortex and interfering with the exhaust from the exhaust port 203.

[0042] In some embodiments, as shown in Figures 2-4, the hinge portion 11 may be provided at the boundary between the air collection region 211 and the intake region 212. This improves the centering of both the first axis and the second axis, further enhancing the rotational stability of the head assembly 2.

[0043] In some embodiments, as shown in Figure 2, the hinge portion 11 may be provided on the side of the connecting wall 12 closer to the air collection area 211 in the second direction F2, and the connecting wall 12 is provided outside the intake area 212. In this way, by screwing or unwinding the head assembly 2 from one end closer to the second cover 23 into the space surrounded by the connecting wall 12, interference with exhaust from the exhaust port 203 during the rotation of the head assembly 2 around the second axis is effectively reduced. On the other hand, the connecting wall 12 is provided outside the intake area 212, and when the fan is in its initial position (i.e., the head assembly 2 is not rotating around the second axis), it effectively facilitates the alignment of the third intake port 204 and the second intake port 202 in the connecting wall 12, and facilitates air intake by the side wall 21 of the head assembly 2.

[0044] In some embodiments, a hinge shaft extending along a third direction F3 may be provided on the outside of the side wall 21, and the hinge portion 11 is hinged to the side wall 21 via the hinge shaft. In other words, the second axis may be the hinge shaft. In some embodiments, although not shown, the fan may further include a second rotary motor, which may be provided on at least one of the two hinge portions 11 to drive the hinge shaft to rotate the head assembly 2 around the second axis.

[0045] In some embodiments, as shown in Figures 2-6, a mounting groove 26 is provided on the outside of the side wall 21, and the connecting wall 12 is provided within the mounting groove 26. This ensures that the outer surfaces of both the connecting wall 12 and the side wall 21 are aligned with each other. In this way, the connecting wall 12 can be effectively hidden within the shell, reducing the space occupied by the bracket assembly 1 and improving the cleanliness and aesthetics of the fan. Furthermore, the structure in which the connecting wall 12 is hidden within the mounting groove 26 effectively improves the compactness between the bracket assembly 1 and the head assembly 2, and further effectively improves the effective airflow efficiency of the fan. Specifically, compared to fans occupying the same outer diameter space, by providing the bracket assembly 1 in close contact with the mounting groove 26, the inner diameter of the fan's main duct can be effectively increased. This allows for the placement of larger diameter blades 24 within the main duct, further effectively improving the effective airflow efficiency of the fan.

[0046] In some embodiments, as shown in Figures 2-6, the side of the arrangement groove 26 away from the exhaust port 203 is open, thus facilitating the screwing or unscrewing of the head assembly 2 into the space enclosed by the connecting wall 12 from one end closer to the second cover 23, and effectively reducing interference with the exhaust from the exhaust port 203 as the head assembly 2 rotates around the second axis.

[0047] Furthermore, in some embodiments, as shown in Figure 6, a relief chamfer is provided at one end of the arrangement groove 26 away from the exhaust port 203, which further facilitates screwing or unscrewing the head assembly 2 into the space surrounded by the connecting wall 12 from the end closer to the second cover 23, and avoids interference between the connecting wall 12 and the rotational motion of the head assembly 2 around the second axis.

[0048] In some embodiments, the dimensions of the relief chamfer account for 8%-10% of the dimensions of the main duct in the second direction F2. Simulation tests using simulation software confirmed that when the dimensions of the relief chamfer in the second direction F2 are 8%-10% of the dimensions of the main duct, the head assembly 2 can rotate smoothly around the second axis, and the influence of the second intake port 202 on the intake direction is minimized.

[0049] In some embodiments, the relief chamfer (i.e., ∠α shown in Figure 6) is 12°-24°, ensuring smooth rotation of the head assembly 2 around the second axis, while also minimizing the impact of the relief angle on the main duct space.

[0050] Correspondingly, as shown in Figure 9, in the second direction F2, the inner surface of the connecting wall 12 gradually inclins outward in the direction from one side facing the first air intake port 201 to the other side, further avoiding interference with the rotational motion of the connecting wall 12 around the second axis of the head assembly 2.

[0051] In some embodiments, as shown in Figure 9, the angle between the inner surface of the connecting wall 12 and the second direction F2 (i.e., ∠β shown in Figure 9) is 8°-20°, or in other words, the angle difference between the inner surface of the connecting wall 12 and the bottom wall of the arrangement groove 26 is at least 4°, thus avoiding interference with the rotational motion of the connecting wall 12 around the second axis of the head assembly 2. The angle between the inner surface of the connecting wall 12 and the second direction F2 may also be understood as the angle between the tangent to the curve formed by the connecting wall 12 at a predetermined cross-section and the second direction F2, where the predetermined cross-section is a plane confirmed by both the radial direction of the side wall 21 and the second direction F2.

[0052] In some embodiments, an interference prevention gap is formed between the side wall 21 and the connecting wall 12 in the radial direction of the side wall 21, and this interference prevention gap may be 3-8 mm. In this way, the head assembly 2 can swing up and down around the second axis on the bracket during fan operation. The interference prevention gap formed between the side wall 21 and the connecting wall 12 not only prevents rotational interference, but also becomes part of the intake air during the operation of the blades. This ensures uniformity of the intake air and reduces operating noise.

[0053] In some embodiments, as shown in Figures 2-4, the span of the arrangement groove 26 in the circumferential direction of the side wall 21 is greater than the span of the bracket assembly 1, and both ends of the arrangement groove 26 in the circumferential direction of the side wall 21 extend beyond the two ends of the side wall 21 of the bracket assembly 1 in the circumferential direction, further providing rotational space for the ends of the bracket assembly 1 and preventing the groove walls of the arrangement groove 26 from interfering with the bracket assembly 1 and affecting the rotation of the bracket assembly 1 relative to the head assembly 2.

[0054] In some embodiments, as shown in Figures 2-4, the arrangement groove 26 includes a position limiting rib 261, which is provided at both ends of the arrangement groove 26 in the circumferential direction of the side wall 21. As shown in Figure 4, when the head assembly 2 rotates to its limit angle about the second axis, the position limiting rib 261 comes into close contact with the outer edge of the connecting wall 12. In this way, the position limiting rib 261 can limit the rotational limit position of the head assembly 2, effectively ensuring the rotational accuracy of the limit position of the head assembly 2 and preventing the head assembly 2 from over-rotating due to its own weight and damaging the hinge portion 11.

[0055] As shown in Figure 4, the figure illustrates an example where the limit angle is 90 degrees, but it is not limited to this, and the limit angle can be adaptively adjusted according to the actual needs of the fan.

[0056] In the embodiment, as shown in Figures 5 and 6, the head assembly 2 may further include a blade section 24 and a rotating section 25 provided within the main duct. The rotating section 25 has a rotating shaft 251 extending along a second direction F2. Both the rotating section 25 and the blade section 24 are provided coaxially via the rotating shaft 251, and the blade section 24 is driven to rotate about the rotating shaft 251, thereby realizing the fan's air-blowing function. Specifically, the blade section 24 includes a connecting section and a plurality of blades 241, the plurality of blades 241 being uniformly arranged in the circumferential direction of the connecting section.

[0057] In some embodiments, the rotating part 25 may be a third rotating motor.

[0058] In some embodiments, as shown in Figure 6, the connection portion is movably connected to one end of the rotating shaft 251 near the first cover 22, and the blades 241 extend from the connection portion outward and toward the side where the second cover 23 is located. In this way, space can be secured within the main duct that the blades 241 can cover, and the air blowing capacity of the blades 241 can be improved.

[0059] In some embodiments, as shown in Figure 6, an intake gap is provided between one end of the vane 241 away from the connection portion and the second cover 23 in the second direction F2, thereby ensuring smooth airflow from the second intake port into the main duct.

[0060] In some embodiments, in the second direction F2, the intake gap dimension (L1 shown in Figure 6) is 4%-6% of the main duct dimension. Simulation tests have shown that when the intake gap dimension (L1 shown in Figure 6) is 4%-6% of the main duct dimension, the airflow can smoothly enter the main duct from the second intake port, and the fan operating noise is minimized.

[0061] In some embodiments, as shown in Figure 6, the second intake port 202 extends from one end to the other of the intake region 212 along the second direction F2; in other words, the second intake port 202 may be an elongated through-hole extending along the second direction F2.

[0062] In some embodiments, as shown in Figure 6, at least a portion of the blade 241 can extend into the intake region 212 so that the blade drives the airflow entering the main duct from the second intake port.

[0063] In some embodiments, as shown in Figure 6, in the second direction F2, the dimension of the portion of the blade 241 extending to the intake region 212 (L2 shown in Figure 6) occupies 40%-50% of the dimensions of the intake region 212. Calculations from simulation tests show that if the dimension of the portion of the blade 241 extending to the intake region 212 (L2 shown in Figure 6) occupies less than 40% of the dimensions of the intake region 212, the exhaust volume of the exhaust port 203 decreases significantly. In other words, the area covered by the blade 241 in the intake region 212 is too small, resulting in insufficient intake area. Conversely, if the dimension of the portion of the blade 241 extending to the intake region 212 (L2 shown in Figure 6) occupies more than 50% of the dimensions of the intake region 212, the wind pressure loss of the blade 241 increases significantly.

[0064] In some embodiments, as shown in Figure 6, in the second direction F2, the dimension of the portion of the blade 241 in the air collection area 211 (L3 shown in Figure 6) occupies 95%-98% of the dimensions of the air collection area 211.

[0065] In the embodiment, as shown in Figures 7 and 8, the area of ​​the connecting wall 12 where the third air intake port 204 is provided is defined as the ventilation area, and the other areas of the connecting wall 12 are defined as the reinforcement area. The thickness of the reinforcement area is greater than that of the ventilation area. By making the ventilation area thinner in this way, it is possible to effectively avoid the thickness of the ventilation area affecting the amount of air intake at the third air intake port 204. At the same time, the thickened structure of the reinforcement area effectively improves the support strength of the connecting wall 12 and ensures the support stability of the connecting wall 12.

[0066] In some embodiments, the ratio of the thickness of the reinforced area to the thickness of the ventilation area is 4:1-5:1 to ensure the support strength of the reinforced portion.

[0067] In some embodiments, as shown in Figure 8, the connecting wall 12 may include a support rack 111 and a cover plate 112. Here, the holder assembly 3 is provided in the center of the support rack 111, and the hinge portion 11 is fixed to both ends of the support rack 111 to ensure the support balance of the connecting wall 12.

[0068] In some embodiments, as shown in Figure 8, the connecting wall 12 may further include a contact base 13 fixedly installed on the side of the support rack 111 facing away from the head assembly 2, and the bracket assembly 1 is transmitted to the first rotary motor via the contact base 13.

[0069] In some embodiments, as shown in Figure 8, the support rack 111 may include a through groove 113 that penetrates the support rack 111, and the third air intake port 204 is provided in the cover plate 112, and the cover plate 112 engages with the portion interposed between the holder assembly 3 and the hinge portion 11 of the support rack 111, so that the ventilation region of the cover plate 112 is provided facing the through groove 113, and in this way the structure of the through groove 113 makes the portion of the connecting wall 12 corresponding to the reinforcing region a two-layer structure, and the portion of the connecting wall 12 corresponding to the ventilation region a single-layer structure, thereby effectively improving the structural strength of the reinforcing region and the amount of air intake in the ventilation region of the connecting wall 12.

[0070] In some embodiments, as shown in Figure 8, there are two cover plates 112, each provided on both sides of the contact base 13 in the third direction F3. Correspondingly, the structure of the through grooves 113 is provided on both sides of the contact base 13 in the third direction F3 of the support rack 111.

[0071] In some embodiments, the cover plate 112 can be engaged with the support rack 111 to facilitate the machining of both the cover plate 112 and the support rack 111.

[0072] In some embodiments, the support rack 111 is provided with an air guide chamfer, which surrounds the edge of the through groove 113, and the air guide chamfer is 2°-6°, improving the intake volume of the third intake port 204.

[0073] Finally, it should be noted that the above embodiments are merely illustrative of the technical concepts of the present disclosure and do not limit them. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical concepts described in the above embodiments or make equivalent substitutions for some or all of the technical features therein, and that such modifications or substitutions will not cause the essence of the corresponding technical concepts to deviate from the scope of the technical concepts of the embodiments of the present disclosure. [Industrial applicability]

[0074] The fan according to the embodiment of this disclosure has hinges at both ends of the connecting wall, and these two hinges are hinged to both ends of the shell in the third direction, thereby effectively shortening the distance between the second axis and the edge of the head assembly, as well as effectively shortening the distance from the second axis to the edge of the head assembly. In other words, the rotational radius of the head assembly around the first axis and the rotational radius of the head assembly around the second axis can be effectively shortened, and furthermore, the rotational stability of the head assembly can be effectively improved, and abnormal noise during rotation can be reduced. This design reduces the probability of occurrence, effectively improves the lifespan of the drive structure (e.g., motor) that rotates the head assembly, provides the connection point between the bracket assembly and the head assembly on the side wall of the shell, effectively avoids shielding of the first air intake port by the bracket assembly, and provides a third air intake port on the connection wall opposite the second air intake port, effectively guarantees uniformity of air intake in the circumferential direction of the head assembly, significantly improves the uniformity of air intake of the head assembly, and further effectively reduces the probability of abnormal noise occurring during fan operation due to uneven air intake, thereby further improving the operational stability of the head assembly. [Explanation of Symbols]

[0075] 01 Fanhead, 02 Support bracket, 1. Bracket assembly, 11. Hinge section, 111 Support rack, 112 Cover plate, 113 Through groove, 12 connecting walls, 13 Contact base, 2 head assemblies, 201 First air intake, 202 Second air intake, 203 Exhaust vent, 204 Third air intake, 21 side wall, 211 Wind gathering area, 212 Intake area, 22 First cover, 23. Second cover, 24 blade section, 241 feathers, 25 Rotating part, 251 Rotation axis, 26 arrangement concave groove, 261 Position limiting rib, 3. Holder assembly, 31 Support rod base, 32 RPM base, F1 1st direction, F2 2nd direction, F3 3rd direction

Claims

1. I am a fan, It includes a head assembly, a holder assembly, and a bracket assembly. The holder assembly extends along the first direction, The bracket assembly is provided at one end of the holder assembly in the first direction, The holder assembly is positioned to rotate the bracket assembly around a first axis extending along the first direction, The head assembly includes a shell portion, the shell portion is provided with an exhaust port, a first intake port and a second intake port, both the exhaust port and the first intake port are provided at both ends of the shell portion in a second direction, the second intake port is provided on the side wall of the shell portion, the second direction intersects the first direction, The bracket assembly includes a connecting wall and two hinge portions, the holder assembly is connected to the bracket assembly via the connecting wall, and the two hinge portions are hinged to both ends of the shell portion in a third direction, thereby driving the bracket assembly to rotate the shell portion around a second axis extending in the third direction. The fan is characterized in that the connecting wall includes a third air intake port provided opposite the second air intake port.

2. The shell portion includes a first cover, a second cover, and the side wall, and a main duct is provided within the side wall, penetrating the side wall along the second direction. The first cover and the second cover each cover both ends of the main duct in the second direction, the exhaust port is provided in the first cover, and the first intake port is provided in the second cover. The fan according to claim 1, wherein the side wall includes an air collection area and an air intake area arranged sequentially along the second direction, one end of the side wall on which the air collection area is located is connected to the first cover, and the second air intake port is provided within the air intake area.

3. The fan according to claim 2, characterized in that the hinge portion is provided at the boundary between the air collection area and the air intake area.

4. The hinge portion is provided on the side of the connecting wall closest to the air collection area in the second direction, The fan according to claim 3, characterized in that the connecting wall is provided outside the intake region.

5. Each head assembly further includes a blade section and a rotating section provided within the main duct, the rotating section having a rotation axis extending along the second direction, and both the rotating section and the blade section are provided coaxially via the rotation axis and are driven to rotate the blade section about the rotation axis. The fan according to any one of claims 2 to 4, characterized in that the blade portion includes a connecting portion and a plurality of blades uniformly distributed in the circumferential direction of the connecting portion.

6. The connecting portion is movably connected to one end of the rotating shaft near the first cover, and the blades extend from the connecting portion outward and toward the side where the second cover is located. The fan according to claim 5, characterized in that, in the second direction, an intake gap is provided between one end of the blade away from the connection portion and the second cover.

7. The fan according to claim 6, characterized in that, in the second direction, the dimension of the intake gap is 4% to 6% of the dimension of the main duct.

8. The second intake port extends along the second direction from one end to the other end of the intake region, At least a portion of the blade extends into the intake region, The fan according to claim 6 or 7, characterized in that, in the second direction, the dimension of the portion of the blades extending to the intake region occupies 40% to 50% of the dimension of the intake region.

9. The fan according to any one of claims 2 to 8, characterized in that an arrangement groove is provided on the outside of the side wall, and the connecting wall is provided in the arrangement groove such that the outer surfaces of both the connecting wall and the side wall are aligned with each other.

10. The side of the arrangement groove away from the exhaust port is open. The fan according to claim 9, characterized in that, in the circumferential direction of the side wall, the span of the arrangement groove is greater than the span of the bracket assembly, and both ends of the arrangement groove in the circumferential direction of the side wall each exceed both ends of the bracket assembly in the circumferential direction of the side wall.

11. The arrangement groove includes position limiting ribs provided at both ends of the arrangement groove in the circumferential direction of the side wall, The fan according to claim 9 or 10, characterized in that the position limiting rib is positioned so as to be in close contact with the outer edge of the connecting wall when the head assembly rotates to a limiting angle about the second axis.

12. A relief chamfer is provided at one end of the arrangement groove that is away from the exhaust port. In the second direction, the dimensions of the relief chamfer account for 8%-10% of the dimensions of the main duct. The fan according to any one of claims 9 to 11, characterized in that the relief chamfer is 12°-24°.

13. The fan according to any one of claims 1 to 12, characterized in that, in the second direction, the inner surface of the connecting wall gradually inclins outward from one side of the connecting wall facing the first air intake to the other side.

14. The fan according to claim 13, characterized in that the angle between the inner surface of the connecting wall and the second direction is 8°-20°.

15. The fan according to any one of claims 1 to 14, characterized in that the region of the connecting wall in which the third air intake port is provided is defined as a ventilation region, the other part of the connecting wall is defined as a reinforcement region, and the thickness of the reinforcement region is greater than that of the ventilation region.

16. The connecting wall includes a support rack and a cover plate. The holder assembly is provided in the center of the support rack, and the hinge portion is fixedly provided at both ends of the support rack. The fan according to claim 15, characterized in that the support rack includes a through groove that penetrates the support rack, the third air intake is provided in the cover plate, and the cover plate is arranged to engage with a portion of the support rack interposed between the holder assembly and the hinge portion such that the ventilation area of ​​the cover plate faces the through groove.

17. The fan according to claim 16, wherein a hinge shaft extending along the third direction is provided on the outside of the side wall, and the hinge portion is connected to the side wall via the hinge shaft.

18. The fan according to claim 16 or 17, characterized in that the support rack is provided with an air guide chamfer, and the air guide chamfer is provided surrounding the edge of the through groove.

19. The fan according to any one of claims 1 to 18, wherein the holder assembly includes a support rod base and a rotating base, the support rod base being aligned in a first direction, the rotating base being provided at one end of the support rod base in the first direction, and the holder assembly being connected to the bracket assembly via the rotating base to drive the holder assembly to rotate about the support rod base as an axis.

20. The fan according to any one of claims 1 to 19, characterized in that an interference prevention gap is formed between the side wall and the connecting wall, and the interference prevention gap is 3 to 8 mm.

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