Nose assembly and fan

Abstract

The utility model discloses a kind of head assembly and fan, it is related to electrical appliance technical field, head assembly includes shell, wind ring, driving part and fan blade, the shell forms air inlet and air outlet, the shell is provided with air duct at the air outlet;The wind ring is installed in the air duct, the inner diameter of the wind ring is gradually reduced from the end close to the air inlet to the direction away from the air inlet;The driving part is installed in the shell;The fan blade is located in the shell and is connected the output shaft of the driving part;The utility model improves the air outlet efficiency of head assembly and reduces the volume of head assembly.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a head assembly and a fan. Background Technology

[0002] As a highly efficient device for promoting indoor air circulation, the core performance indicators of air circulator fans lie in their air delivery distance and wind speed. Traditional designs typically employ extended air outlet duct lengths to achieve long-distance air delivery. While this straight-tube duct structure can concentrate airflow to some extent, it results in a bulky head section, significantly increasing the overall thickness and weight of the unit. This design flaw not only affects the product's portability and aesthetics but also leads to material waste and increased production costs. Furthermore, an excessively long duct structure can increase airflow resistance, potentially reducing actual air delivery efficiency. Current technology lacks a solution that maintains good air delivery performance while achieving a compact head structure, which has become a significant bottleneck restricting the development of air circulator fans. Especially in home settings, users have higher demands for thinner, more aesthetically pleasing, and quieter fan products, which traditional designs struggle to meet. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] The main purpose of this utility model is to propose a head unit and fan that has the advantages of improving air output efficiency and reducing the size of the head unit.

[0004] To achieve the above objectives, the present invention provides a fan head assembly, which includes:

[0005] The housing forms an air inlet and an air outlet, and the housing is provided with an air duct at the air outlet;

[0006] An air-gathering ring is installed inside the air duct, and the inner diameter of the air-gathering ring gradually decreases from the end near the air inlet to the direction away from the air inlet.

[0007] A driving component, which is installed inside the housing;

[0008] Fan blades, which are located inside the housing and connected to the output shaft of the drive unit.

[0009] In one embodiment, the housing includes a rear mesh cover and a front mesh cover connected to each other, the drive member is mounted on the rear mesh cover, the rear mesh cover forms the air inlet and the air outlet, the connection between the air outlet and the air duct forms a stepped surface, and the front mesh cover is sandwiched between the air gathering ring and the stepped surface.

[0010] In one embodiment, the wind-gathering ring includes a bent wind-gathering part and a connecting part. The end of the wind-gathering part away from the connecting part abuts against the front mesh cover. The inner radial direction of the wind-gathering part is gradually narrowed away from the front mesh cover. A gap is formed between the outer wall of the wind-gathering part and the air duct. The connecting part connects the air duct and covers the gap.

[0011] In one embodiment, the rear cover includes a rear cover and a side panel connected to each other, the side panel forming the air outlet, the connection between the side panel and the air duct forming the stepped surface, the drive member being mounted on the rear cover, and the air inlet including a first air inlet portion and a second air inlet portion, the first air inlet portion being formed on the rear cover, and the second air inlet portion being formed on the side panel.

[0012] In one embodiment, the rear cover is a columnar structure, the rear cover includes a plurality of spokes arranged radially at intervals, the plurality of spokes are spaced apart to form the first air inlet, and the side wall is provided with a plurality of strip-shaped holes spaced apart along its circumference, the plurality of strip-shaped holes forming the second air inlet.

[0013] In one embodiment, the driving component is a motor, a mounting base is provided at the center of the rear mesh cover, the mounting base has a mounting groove, the driving component is connected to a mounting protrusion, and the mounting protrusion is used to fix it in the mounting groove.

[0014] In one embodiment, the head assembly further includes a fan blade cover, the output shaft of the drive member is provided with threads, the fan blade cover has a threaded hole, the fan blade has a through hole, and the output shaft of the drive member passes through the through hole and is threadedly connected to the fan blade cover.

[0015] In one embodiment, the outer wall of the housing is further provided with a mounting bracket for connecting to a fan.

[0016] In addition, this utility model also provides a fan, which uses the above-mentioned fan.

[0017] The technical solution of this utility model is to set an air duct at the air outlet through the housing and set the air gathering ring inside the air duct. By adopting the design of the gradually narrowing inner diameter of the air gathering ring, the cross-sectional area of ​​the airflow passing through the air duct is gradually reduced, which increases the wind speed blown out by the fan blades and reduces the size of the head while ensuring the air outlet efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of the head assembly provided by this utility model at one angle;

[0020] Figure 2 for Figure 1 A three-dimensional structural diagram of the mid-engine nose assembly from another angle;

[0021] Figure 3 A cross-sectional view of the head assembly provided by this utility model;

[0022] Figure 4 This is an exploded structural diagram of the head assembly provided by this utility model.

[0023] Explanation of icon numbers:

[0024] 100. Head assembly; 1. Housing; 2. Concentrator ring; 3. Drive unit; 4. Fan blade; 11. Air inlet; 12. Air outlet; 13. Air duct; 14. Rear grille; 15. Front grille; 16. Stepped surface; 21. Concentrator section; 22. Connecting section; 23. Gap; 141. Rear cover; 142. Side panel; 111. First air inlet; 112. Second air inlet; 1411. Spoke; 1421. Strip hole; 143. Mounting base; 1431. Mounting groove; 31. Mounting protrusion; 5. Fan blade cover; 17. Mounting bracket.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] In existing technologies, air circulator fans typically employ a straight-tube duct structure to enhance airflow. This design concentrates airflow by extending the duct length, which, while increasing the wind speed at the far end, also leads to an increase in the thickness of the fan head. The increased size resulting from the straight-tube duct not only affects product portability but also causes material waste and increased production costs, limiting the development of products in the direction of miniaturization and lightweighting.

[0030] To address the aforementioned issues, traditional fans present a significant contradiction in balancing airflow concentration and structural compactness. Observation reveals that the core function of a straight-tube duct is to constrain airflow direction, but its length directly affects the axial dimensions of the fan head. To resolve this contradiction, the focus should be on optimizing airflow acceleration within a limited space, rather than simply extending the duct. Based on fluid dynamics principles, a tapered channel can generate a Venturi effect to accelerate airflow, but integrating this into the fan structure requires a redesign of the component layout. Further analysis shows that combining the tapered structure with the duct can achieve airflow acceleration while reducing axial space occupation. Simultaneously, the compact installation of the drive components and the direct-drive design of the fan blades can further optimize the utilization of internal space.

[0031] This utility model proposes a head assembly and a fan.

[0032] Please see Figures 1 to 4In one embodiment of the present invention, the head assembly 100 includes a housing 1, an air-gathering ring 2, a drive component 3, and a fan blade 4. The housing 1 forms an air inlet 11 and an air outlet 12, and an air duct 13 is provided at the air outlet 12. The air-gathering ring 2 is installed in the air duct 13, and the inner diameter of the air-gathering ring 2 is gradually reduced from the end near the air inlet 11 to the direction away from the air inlet 11. The drive component 3 is installed in the housing 1. The fan blade 4 is located in the housing 1 and is connected to the output shaft of the drive component 3.

[0033] The housing 1 refers to the main structure supporting all components, which is achieved by combining a front mesh cover 15 and a rear mesh cover 14. The air inlet 11 and the air outlet 12 form a forced convection path. Specifically, the housing 1 can be manufactured using injection molding. Its internal cavity is used to accommodate the drive component 3 and the fan blades 4 and form an airflow channel. The air-gathering ring 2 refers to a ring-shaped component with a tapered inner wall. Its diameter is larger at the end near the air inlet 11 and smaller at the end away from the air inlet 11. The drive component 3 refers to the power output device, such as a brushless motor, which is installed in the central area of ​​the rear of the housing 1. Specifically, it can be fixed to the internal bracket of the housing 1 by clips or bolts. The fan blades 4 refer to the airflow driving component. Its blades adopt a backward-curved design and can be connected to the drive shaft by interference fit or keyway structure.

[0034] Specifically, after the airflow enters the housing 1 through the air inlet 11, it is accelerated by the rotating fan blades 4 to form a high-speed airflow. When the airflow enters the duct 13, the tapering inner wall of the converging ring 2 forces the airflow cross-sectional area to gradually decrease, and according to the principle of continuity, the flow velocity increases accordingly. A stable flow channel is formed between the converging ring 2 and the inner wall of the duct 13, effectively suppressing turbulence. The drive unit 3 directly drives the fan blades 4 to rotate through the output shaft, eliminating the space occupied by the traditional gear transmission mechanism. The compact arrangement of components within the housing 1 shortens the length of the duct 13, while the tapering structure of the converging ring 2 compensates for the impact of shortening the duct 13 on the airflow acceleration capability.

[0035] Compared to existing technologies, the straight-tube duct 13 requires increased length to maintain airflow velocity, while this solution utilizes a tapered converging ring 2 to achieve an equivalent acceleration effect within the limited length of the duct 13. Through this technical solution, this application can reduce the thickness of the nozzle while maintaining an equivalent outlet airflow velocity. The tapered structure of the converging ring allows the airflow to receive secondary acceleration as it passes through the duct 13, compensating for the velocity loss caused by shortening the duct 13. The direct connection design between the drive component 3 and the fan blade 4 eliminates the space occupied by transmission components, optimizing the axial dimensions of the housing 1. The integrated arrangement of components reduces assembly complexity while improving structural strength.

[0036] In one embodiment, the housing 1 includes a rear mesh cover 14 and a front mesh cover 15 connected to each other. A drive member 3 is mounted on the rear mesh cover 14, which forms an air inlet 11 and an air outlet 12. A stepped surface 16 is formed at the connection between the air outlet 12 and the air duct 13. The front mesh cover 15 is sandwiched between the air-gathering ring 2 and the stepped surface 16. The rear mesh cover 14 refers to the rear support structure of the housing 1, manufactured using injection molding. The stepped surface 16 is the annular support surface at the junction of the air duct 13 and the air outlet 12, formed by an annular protrusion with a width of 3-5 mm at the end of the side wall 142 of the rear mesh cover 14, used to limit the axial displacement of the front mesh cover 15. The contact surface between the stepped surface 16 and the front mesh cover 15 is set as a plane to ensure an effective seal during assembly. During installation, the edge of the front mesh cover 15 is pressed between the stepped surface 16 and the air-gathering ring 2, forming a three-point clamping structure. This clamping method eliminates the need for bolts or clips, enabling the installation and fixation of the front mesh cover 15.

[0037] In one embodiment, the air-gathering ring 2 includes a bent air-gathering part 21 and a connecting part 22. The end of the air-gathering part 21 away from the connecting part 22 abuts against the front mesh cover 15. The inner radial direction of the air-gathering part 21 is gradually narrowed away from the front mesh cover 15. A gap 23 is formed between the outer wall of the air-gathering part 21 and the air duct 13. The connecting part 22 connects to the air duct 13 and covers the gap 23. Here, the air-gathering part 21 refers to an air-guiding component with a gradually narrowing inner diameter. Its gradually narrowing inner diameter structure can accelerate airflow and shorten the length of the air duct 13. The connecting part 22 refers to an annular fixed structure connected to the air duct 13. Since the diameter of the end of the air-gathering part 21 near the air inlet 11 is larger and the diameter of the end of the air-gathering part 21 away from the air inlet 11 is smaller, a gap 23 is formed between the outer wall of the air-gathering part 21 and the air duct 13. By setting the connecting part 22, the gap 23 can be covered, preventing airflow leakage and also improving the appearance of the head assembly 100.

[0038] In one embodiment, the rear cover 14 includes a rear cover 141 and a side wall 142 connected to each other. The side wall 142 forms an air outlet 12. A stepped surface 16 is formed at the connection between the side wall 142 and the air duct 13. The drive member 3 is mounted on the rear cover 141. The air inlet 11 includes a first air inlet 111 and a second air inlet 112. The first air inlet 111 is formed on the rear cover 141, and the second air inlet 112 is formed on the side wall 142.

[0039] Here, the rear cover 141 refers to the support structure located at the rear of the housing 1; the side wall 142 refers to the annular housing 1 extending circumferentially around the rear cover 141; the stepped surface 16 refers to the annular boss structure formed at the connection between the side wall 142 and the air duct 13; the first air inlet 111 refers to the air inlet channel opened in the area of ​​the rear cover 141, which can be implemented through axial gaps formed by the spacing of the spokes 1411, and is used to introduce axial airflow. The second air inlet 112 refers to the air inlet channel opened in the area of ​​the side wall 142, which can be implemented through circumferentially distributed strip-shaped holes 1421, and is used to introduce radial airflow.

[0040] In one embodiment, the rear grille 14 has a columnar structure. The rear grille 141 includes multiple spokes 1411 arranged radially at intervals. The multiple spokes 1411 are spaced apart to form a first air inlet 111. The side wall 142 has multiple strip-shaped holes 1421 spaced apart along its circumference, which form a second air inlet 112. Specifically, the spoke 1411 frame structure of the rear grille 141, while maintaining sufficient structural strength, forms uniformly distributed axial air inlet gaps 23 as the first air inlet 111, realizing the airflow required for heat dissipation of the drive component 3. The strip-shaped holes 1421 of the side wall 142 are uniformly arranged circumferentially to form the second air inlet 112. When the fan blade 4 rotates, radial airflow is drawn in through the negative pressure effect. This design can not only ensure the air intake of the fan, but also effectively improve the structural strength of the rear grille 14.

[0041] In one embodiment, the drive component 3 is a motor, and a mounting base 143 is provided at the center of the rear mesh cover 14. The mounting base 143 has a mounting groove 1431, and the drive component 3 is connected to a mounting protrusion 31, which is used to fix it in the mounting groove 1431. The mounting base 143 refers to the support structure located in the central area of ​​the rear mesh cover 14, and can be a one-piece structure formed by injection molding, used to provide a reference positioning surface for the installation of the drive component 3. The mounting groove 1431 refers to the recessed structure on the mounting base 143, and the mounting protrusion 31 refers to the protrusion extending from the outer shell of the drive component 3, used to insert into the mounting groove 1431 by plugging in, and the mounting protrusion 31 and the mounting groove 1431 are fixedly connected by connecting bolts, achieving precise positioning and stable fixation of the drive component 3 inside the shell 1, avoiding structural loosening during high-speed operation, and reducing the space occupied inside the machine head.

[0042] In one embodiment, the head assembly 100 further includes a fan blade cover 5, the output shaft of the drive member 3 is provided with threads, the fan blade cover 5 has a threaded hole, the fan blade 4 has a through hole, and the output shaft of the drive member 3 passes through the through hole and is threadedly connected to the fan blade cover 5.

[0043] Specifically, after the output shaft of the drive unit 3 passes through the through hole of the fan blade 4, its external thread engages with the threaded hole of the fan blade cover 5. When the fan blade cover 5 is rotated, the axial displacement generated by the threaded pair causes the fan blade cover 5 to move towards the fan blade 4 until the fan blade 4 is clamped between the fan blade cover 5 and the housing 1 of the drive unit 3. At this time, the output shaft and the fan blade 4 achieve circumferential torque transmission through the through hole, while the threaded connection of the fan blade cover 5 provides axial constraint, forming a double fixing mechanism. During disassembly, simply rotating the fan blade cover 5 in the opposite direction can release the axial clamping and achieve quick separation.

[0044] In one embodiment, the rear mesh cover 14 is a one-piece molded component. A one-piece molded component refers to an integral structural part formed in one step through injection molding, stamping, or casting processes, and can be made of polypropylene, ABS engineering plastics, or aluminum alloy. This feature eliminates the need for separate, spliced ​​structures, reducing assembly interfaces between components.

[0045] In one embodiment, the outer wall of the housing 1 is further provided with a mounting bracket 17 for connecting to the fan. The mounting bracket 17 is a fixing component used to connect the head assembly 100 to the external structure. Specifically, it can be implemented using a snap-fit, bolt, or plug-in structure. For example, a metal bracket with screw holes can be provided on the side wall of the housing 1, and fixed to the corresponding interface of the base using screws. The function of the mounting bracket 17 is to provide a stable and detachable connection method, allowing the head assembly 100 to be quickly installed onto the fan's support structure. The size and shape of the mounting bracket 17 can be adjusted according to the specific structure of the fan to adapt to different fan models.

[0046] In addition, this utility model also provides a fan that incorporates the aforementioned head assembly 100. Since this fan employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fan head assembly, characterized in that, The head assembly includes: The housing forms an air inlet and an air outlet, and the housing is provided with an air duct at the air outlet; An air-gathering ring is installed inside the air duct, and the inner diameter of the air-gathering ring gradually decreases from the end near the air inlet to the direction away from the air inlet. A driving component, which is installed inside the housing; Fan blades, which are located inside the housing and connected to the output shaft of the drive unit.

2. The head assembly as described in claim 1, characterized in that, The housing includes a rear mesh cover and a front mesh cover that are connected to each other. The drive unit is installed on the rear mesh cover. The rear mesh cover forms the air inlet and the air outlet. The connection between the air outlet and the air duct forms a stepped surface. The front mesh cover is sandwiched between the air gathering ring and the stepped surface.

3. The head assembly as described in claim 2, characterized in that, The wind-gathering ring includes a bent wind-gathering part and a connecting part. The end of the wind-gathering part away from the connecting part abuts against the front mesh cover. The inner radial direction of the wind-gathering part is gradually narrowed away from the front mesh cover. A gap is formed between the outer wall of the wind-gathering part and the air duct. The connecting part connects the air duct and covers the gap.

4. The head assembly as described in claim 2, characterized in that, The rear cover includes a rear cover and a side panel connected to each other. The side panel forms the air outlet. The connection between the side panel and the air duct forms the stepped surface. The drive unit is mounted on the rear cover. The air inlet includes a first air inlet and a second air inlet. The first air inlet is formed on the rear cover, and the second air inlet is formed on the side panel.

5. The head assembly as described in claim 4, characterized in that, The rear cover has a columnar structure and includes multiple spokes arranged radially at intervals. The multiple spokes are spaced apart to form the first air inlet. The side panel has multiple strip-shaped holes spaced apart along its circumference, and the multiple strip-shaped holes form the second air inlet.

6. The head assembly as described in claim 2, characterized in that, The driving component is a motor, and a mounting base is provided at the center of the rear mesh cover. The mounting base has a mounting groove, and the driving component is connected to a mounting protrusion, which is used to fix it in the mounting groove.

7. The head assembly as described in claim 6, characterized in that, The head assembly also includes a fan blade cover. The output shaft of the drive unit is provided with threads. The fan blade cover has a threaded hole. The fan blade has a through hole. The output shaft of the drive unit passes through the through hole and is threadedly connected to the fan blade cover.

8. The head assembly as described in any one of claims 1 to 7, characterized in that, The outer wall of the housing is also provided with a mounting bracket for connecting to a fan.

9. A fan, characterized in that, The fan used is the fan described in any one of claims 1 to 8.

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