Direct blowing type neck-hanging fan

Abstract

The utility model discloses a direct blowing type neck-hanging fan which comprises a support capable of being worn on the neck of a human body, the support is provided with extension arms located on the two sides of the neck of the human body, the tail ends of the extension arms are connected with a blowing device, the blowing device is provided with an air duct and a fan assembly, an air duct is formed in the air duct, and an air inlet is formed in the air duct. The air duct penetrates through the upper end of the air barrel to form an air outlet, a first air guide piece is arranged in the air outlet, and an air outlet gap and an air gathering channel are formed between the first air guide piece and the air outlet. The air outlet speed of air outlet can be increased, and the air blowing effect is better.

Description

Technical Field

[0001] This utility model relates to the field of neck fan technology, specifically to a direct-blowing neck fan. Background Technology

[0002] A neck fan is a wearable device that blows air around a user's neck. It moves with the user and frees up the user's hands. It cools and dissipates heat by blowing air onto the face and neck.

[0003] Neck fans typically consist of a wearable neck support with shells on either side of the neck. Inside the shells are air ducts and a fan assembly, while outside are air inlets and outlets. The fan assembly draws in outside air through the inlets, delivers it to the air ducts, and finally blows it out through the outlets. However, traditional neck fans often suffer from low airflow speeds at the outlets, resulting in poor airflow. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a direct-blowing neck fan that increases airflow speed and provides a better blowing effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A direct-blowing neck fan includes a support that can be worn on the neck of a person, the support having extension arms located on both sides of the neck.

[0007] The end of the extension arm is connected to a blower device, which has a blower tube and a fan assembly. An air duct is formed inside the blower tube, and the fan assembly is located in the air duct. The blower tube is provided with an air inlet that communicates with the air duct, and the air duct passes through the upper end of the blower tube to form an air outlet.

[0008] The air outlet is provided with a first air guide, and the circumferential edge of the first air guide is spaced apart from the air outlet to form an annular air outlet gap. The circumferential outer wall of the first air guide is formed with an annular first air guide surface. The first air guide surface extends from top to bottom toward the first axis of the air duct. The first air guide surface and the circumferential inner wall of the air duct form an air gathering channel. The cross-section of the air gathering channel gradually decreases along the air flow direction, and the narrower end of the air gathering channel is connected to the air outlet gap.

[0009] By connecting a blower to the end of the extension arm, the blower has a blower duct and a fan assembly. The blower duct is provided with an air duct, an air inlet and an air outlet. A first air guide is provided in the air outlet. The first air guide and the air outlet form an annular air outlet gap. The outer circumferential wall of the first air guide forms an annular first air guide surface. The first air guide surface extends from top to bottom towards the first axis of the blower duct. The first air guide surface and the inner circumferential wall of the air duct form an air-gathering channel. The cross-section of the air-gathering channel gradually decreases along the air flow direction, and the narrower end of the air-gathering channel is connected to the air outlet gap. By utilizing the air-gathering effect of the air-gathering channel, the air pressure is increased, and the air speed is increased when the air is blown out of the air outlet gap, resulting in a better blowing effect.

[0010] In one embodiment, when the first air guide surface extends infinitely in a direction away from the first axis of the air duct, the first air guide surface does not intersect with the air duct.

[0011] In one embodiment, the vertical distance h between the first air guide surface and the upper edge of the air duct is 0.1 mm to 10 mm.

[0012] In one embodiment, the angle β1 between the first air guide surface and the circumferential inner wall of the air duct is greater than 15°.

[0013] In one embodiment, a tapered second air guide surface is formed at the bottom of the first air guide component. The second air guide surface extends from top to bottom toward the first axis of the air duct, and the upper edge of the second air guide surface is connected to the lower edge of the first air guide surface.

[0014] In one embodiment, the air-gathering channel has several connecting ribs arranged in a ring, and the two ends of the connection are respectively connected to the first air guide and the air duct.

[0015] In one embodiment, the air duct is a trumpet-shaped air duct, and the cross-section of the trumpet-shaped air duct gradually increases along the direction of air flow.

[0016] In one embodiment, the circumferential inner wall of the trumpet-shaped air duct is formed with a third air guiding surface arranged in an annular manner, and the third air guiding surface and the first air guiding surface form the air gathering channel.

[0017] In one embodiment, the included angle β2 between the third air guide surface and the first axis of the air duct is 0° to 3°.

[0018] In one embodiment, the air duct passes through the lower end of the air duct to form an air inlet. A second air guide is provided inside the air inlet. The second air guide has a middle part, an annular part and several connecting rods. Several connecting rods surround the outside of the middle part. The two ends of the connecting rods are respectively connected to the middle part and the annular part. An air inlet hole is formed between two adjacent connecting rods and the annular part.

[0019] In one embodiment, when the connecting rod extends infinitely at one end near the middle part, the connecting rod does not intersect with the second axis of the middle part, so that the cross-section of the air inlet is triangular, and the wider end of the air inlet is close to the inner wall of the air duct.

[0020] In one embodiment, the connecting rod is a circular connecting rod.

[0021] In one embodiment, the air duct is rotatably and adjustablely mounted on the extension arm, and the rotation center line of the air duct is perpendicular to the first axis of the air duct.

[0022] In one embodiment, the extension arm is telescopically adjustable and mounted on a bracket.

[0023] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, by connecting a blower to the end of the extension arm, the blower has a blower duct and a fan assembly. The blower duct is provided with a duct, an air inlet and an air outlet. A first air guide is provided in the air outlet. The first air guide and the air outlet form an annular air outlet gap. The outer circumferential wall of the first air guide forms an annular first air guide surface. The first air guide surface extends from top to bottom towards the first axis of the blower duct. The first air guide surface and the inner circumferential wall of the duct form an air-gathering channel. The cross-section of the air-gathering channel gradually decreases along the air flow direction, and the narrower end of the air-gathering channel is connected to the air outlet gap. By utilizing the air-gathering effect of the air-gathering channel, the air pressure is increased, and the air speed is increased when the air is blown out of the air outlet gap, resulting in a better blowing effect.

[0024] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0025] Figure 1 This is a first-view assembly structure schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a second-view assembly structure schematic diagram of an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the air duct rotation adjustment state according to an embodiment of the present utility model;

[0028] Figure 4 This is a first-view structural schematic diagram of the blower device according to an embodiment of the present utility model;

[0029] Figure 5 This is a second-view structural schematic diagram of the blower device according to an embodiment of the present utility model;

[0030] Figure 6 This is a cross-sectional schematic diagram of a blower device according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached diagram:

[0032] 10-Bracket, 11-Extension arm, 20-Blower, 21-Air duct, 211-Air channel, 212-Air inlet, 213-Air outlet, 214-Third air guide surface, 22-Fan assembly, 221-Fan blade, 23-First air guide component, 231-First air guide surface, 232-Second air guide surface, 24-Air outlet gap, 25-Air gathering channel, 26-Connecting rib, 27-Second air guide component, 271-Middle part, 272-Annular part, 273-Connecting rod, 274-Air inlet hole, N-First axis, S-Second axis. Detailed Implementation

[0033] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] like Figure 1-6 As shown, this utility model discloses a direct-blowing neck fan, including a support 10 that can be worn on the neck of a human body, the support 10 having extension arms 11 located on both sides of the neck of a human body.

[0036] The end of the extension arm 11 is connected to a blower device 20. The blower device 20 has a blower duct 21 and a fan assembly 22. An air duct 211 extends axially inside the blower duct 21. The fan assembly 22 is disposed in the air duct 211. The fan assembly 22 has a fan blade 221 and a motor that drives the fan blade 221 to rotate. The blower duct 21 is provided with an air inlet 212 that communicates with the air duct 211. The air duct 211 passes through the upper end of the blower duct 21 to form an air outlet 213.

[0037] The air outlet 213 is provided with a first air guide 23. The circumferential edge of the first air guide 23 and the air outlet 213 are spaced together to form an annular air outlet gap 24. The circumferential outer wall of the first air guide 23 forms an annular first air guide surface 231. The first air guide surface 231 extends from top to bottom in the direction of the first axis N close to the air duct 21. The first air guide surface 231 and the circumferential inner wall of the air duct 211 form an air gathering channel 25. The cross-section of the air gathering channel 25 gradually decreases along the air flow direction, and the narrower end of the air gathering channel 25 is connected to the air outlet gap 24. The width d of the air outlet gap 24 in the radial direction of the air duct 21 is 3mm to 15mm, preferably 5mm to 10mm. By setting the width d of the air outlet gap 24 in the radial direction of the air duct 21 to 3mm to 15mm, the air outlet gap 24 has a better air volume. The effect is better when the width d is 5mm to 10mm.

[0038] When the first air guide surface 231 extends infinitely in the direction away from the first axis N of the air duct 21, the first air guide surface 231 does not intersect with the air duct 21. By setting the first air guide surface 231 to extend infinitely in the direction away from the first axis N of the air duct 21, the first air guide surface 231 does not intersect with the air duct 21, so that the air will not be obstructed by the air duct 21 when it blows out along the first air guide surface 231, thus allowing the air to blow out smoothly. At the same time, it can also increase the blowing range and further improve the blowing effect.

[0039] The vertical distance h between the first air guide surface 231 and the upper edge of the air duct 21 is 0.1mm to 10mm, preferably 3mm to 7mm.

[0040] The included angle β1 between the first air guide surface 231 and the circumferential inner wall of the air duct 21 is greater than 15°, preferably 18° to 50°. By setting the included angle β1 between the first air guide surface 231 and the circumferential inner wall of the air duct 21 to be greater than 15°, the air gathering channel has both a high air guiding effect and a high air gathering volume. The effect is better when the included angle β1 is 18° to 50°.

[0041] The bottom of the first air guide 23 has a tapered second air guide surface 232. The second air guide surface 232 extends from top to bottom toward the first axis N near the air duct 21. The upper edge of the second air guide surface 232 is connected to the lower edge of the first air guide surface 231. By using the tapered second air guide surface 232, the air is evenly guided to the air gathering channel 25 by utilizing the air guiding effect of the second air guide surface 232.

[0042] The wind-gathering channel 25 has several connecting ribs 26 arranged in a ring inside, and the two ends of the connection are respectively connected to the first air guide 23 and the air duct 21.

[0043] The air duct 211 is a trumpet-shaped air duct 211, and the cross-section of the trumpet-shaped air duct 211 gradually increases along the air flow direction.

[0044] The circumferential inner wall of the trumpet-shaped air duct 211 is formed with a third air guiding surface 214 arranged in an annular manner, and the third air guiding surface 214 and the first air guiding surface 231 form the air gathering channel 25.

[0045] The included angle β2 between the third air guide surface 214 and the first axis N of the air duct 21 is 0° to 3°, preferably 1° to 2°.

[0046] The air duct 211 extends in a straight line and passes through the lower end of the air duct 21 to form an air inlet 212. A second air guide 27 is provided inside the air inlet 212. The second air guide 27 has a middle part 271, an annular part 272 and several connecting rods 273. Several connecting rods 273 surround the outside of the middle part 271. The two ends of the connecting rods 273 are respectively connected to the middle part 271 and the annular part 272. An air inlet hole 274 is formed between two adjacent connecting rods 273 and the annular part 272. The connecting rods 273 are circular connecting rods 273.

[0047] When the connecting rod 273 extends infinitely near one end of the middle part 271, the connecting rod 273 does not intersect the second axis S of the middle part 271, so that the cross-section of the air inlet hole 274 is triangular, and the wider end of the air inlet hole 274 is close to the inner wall of the air duct 21; by adopting the triangular cross-section of the air inlet hole 274, and the wider end of the air inlet hole 274 is close to the inner wall of the air duct 21, the air intake volume is increased.

[0048] The air duct 21 is rotatably and adjustablely mounted on the extension arm 11. The rotation center line of the air duct 21 is perpendicular to its first axis N. Specifically, a gear (not shown) and a locking block (not shown) can be provided between the air duct 21 and the extension arm 11. Rotating the air duct 21 adjusts the blowing angle, and the locking block engages with the teeth on the gear to keep the air duct 21 in its current position. Alternatively, a rotating shaft (not shown) and a shaft hole (not shown) can be provided between the air duct 21 and the extension arm 11. The rotating shaft and the shaft hole are interference-fitted, and the air duct 21 can also remain in its current position when the rotating shaft rotates relative to the shaft hole. By rotatably and adjustablely mounting the air duct 21 on the extension arm 11, the user can adjust the blowing angle as needed (e.g., ...). Figure 3 (As shown), it is easy to use.

[0049] The extension arm 11 is telescopically adjustable and mounted on the bracket 10. By setting the extension arm 11 to be telescopically adjustable and mounted on the bracket 10, the length of the extension arm 11 can be adjusted, thereby adjusting the position of the air duct 21 closer to or further away from the human head, and improving the blowing effect.

[0050] In summary, this utility model connects a blower device 20 to the end of the extension arm 11. The blower device 20 has a blower duct 21 and a fan assembly 22. The blower duct 21 is provided with a duct 211, an air inlet 212 and an air outlet 213. A first air guide 23 is provided in the air outlet 213. The first air guide 23 and the air outlet 213 form an annular air outlet gap 24. The circumferential outer wall of the first air guide 23 forms an annular first air guide surface 231. The first air guide surface 231 extends from top to bottom in the direction of the first axis N close to the blower duct 21. The first air guide surface 231 and the circumferential inner wall of the duct 211 form a wind-gathering channel 25. The cross-section of the wind-gathering channel 25 gradually decreases along the direction of air flow, and the narrower end of the wind-gathering channel 25 is connected to the air outlet gap 24. By utilizing the wind-gathering effect of the wind-gathering channel 25, the air pressure is increased, and the air speed is increased when the air is blown out of the air outlet gap 24, resulting in a better blowing effect.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A direct blowing neck-hanging fan, characterized in that, The support includes a support wearable on the neck of a human body, the support having extension arms on both sides of the neck of the human body; The end of the extension arm is connected with a blowing device, the blowing device having a wind barrel and a fan assembly, the wind barrel being formed with a wind channel, the fan assembly being arranged in the wind channel, the wind barrel being provided with an air inlet communicating with the wind channel, and the wind channel penetrating the upper end of the wind barrel to form an air outlet; The air outlet is provided with a first air guide, the circumferential edge of the first air guide and the air outlet being spaced apart to form an annular air outlet gap, the circumferential outer wall of the first air guide being formed with an annular first air guide surface, the first air guide surface extending downward from the top to the first axis of the wind barrel, the first air guide surface and the circumferential inner wall of the wind channel forming a wind gathering channel, the cross section of the wind gathering channel gradually decreasing along the flow direction of the air, and the narrower end of the wind gathering channel communicating with the air outlet gap.

2. The direct blowing neck-hanging fan according to claim 1, characterized in that, When the first air guide surface extends infinitely away from the first axis of the wind barrel, the first air guide surface does not intersect the wind barrel.

3. The direct blowing neck-hanging fan according to claim 2, characterized in that, The vertical distance h between the first air guide surface and the upper edge of the wind barrel is 0.1mm-10mm.

4. The direct blowing neck-hanging fan according to claim 1, characterized in that, The included angle β1 between the first air guide surface and the circumferential inner wall of the wind barrel is greater than 15°.

5. The direct blowing neck-hanging fan according to claim 1, characterized in that, The bottom of the first air guide is formed with a second air guide surface arranged in a tapered manner, the second air guide surface extending downward from the top to the first axis of the wind barrel, and the upper edge of the second air guide surface being connected with the lower edge of the first air guide surface.

6. The direct blowing neck-hanging fan of claim 1, wherein, A plurality of connecting ribs are annularly distributed in the wind gathering channel, and the two ends of the connecting ribs are connected with the first air guide and the wind barrel, respectively.

7. The direct blowing neck-hanging fan according to claim 1, characterized in that, The wind channel is a horn-shaped wind channel, and the cross section of the horn-shaped wind channel gradually increases along the flow direction of the air.

8. The direct blowing neck-hanging fan according to claim 7, characterized in that, The circumferential inner wall of the horn-shaped wind channel is formed with an annular third air guide surface, and the third air guide surface and the first air guide surface form the wind gathering channel.

9. The direct blowing neck-hanging fan according to claim 8, characterized in that, The included angle β2 between the third air guide surface and the first axis of the wind barrel is 0°-3°.

10. The direct blowing neck-hanging fan of claim 1, wherein, The wind channel penetrates the lower end of the wind barrel to form an air inlet, and the air inlet is provided with a second air guide, the second air guide having a middle part, an annular part and a plurality of connecting rods, the connecting rods being annularly arranged on the outside of the middle part, the two ends of the connecting rods being connected with the middle part and the annular part, respectively, and the annular part being surrounded by the two adjacent connecting rods to form an air inlet hole.

11. The direct blowing neck-hanging fan according to claim 10, characterized in that, When the end of the connecting rod close to the middle part extends infinitely, the connecting rod does not intersect the second axis of the middle part, so that the cross section of the air inlet hole is triangular, and the wider end of the cross section of the air inlet hole is close to the inner wall of the wind barrel.

12. The direct blowing neck-hanging fan according to claim 10, characterized in that, The connecting rod is a circular connecting rod.

13. The direct blowing neck-hanging fan of claim 1, wherein, The wind barrel is rotatably adjusted and mounted on the extension arm, and the rotation center line of the wind barrel is perpendicular to the first axis of the wind barrel.

14. The direct blowing neck-hanging fan of claim 1, wherein, The extension arm is telescopically adjusted and mounted on the support.

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