Neck-hung fan

Abstract

The utility model discloses a neck hanging fan which comprises a support capable of being worn on the neck of a human body, the support is provided with a shell located on the two sides of the neck of the human body, an air inlet and a first air outlet are formed in the shell, an air channel and a fan assembly are arranged in the shell, and the air inlet and the first air outlet are both communicated with the air channel. An air duct is arranged in the shell, the peripheral side in the air duct is provided with a smooth inner surface without raised lines, an inner container of a hollow structure is arranged in the shell, the inner container extends in the length direction of the shell, the air duct is arranged in the inner container, a second air outlet is formed in the inner container, and the air duct, the second air outlet and the first air outlet are sequentially communicated. Therefore, the air outlet speed of the neck-hanging fan is high, the air outlet amount is large, and the air blowing effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, concretely relates to a neck fan. BACKGROUND

[0002] The neck fan is a kind of wearable blowing device on the neck of user, can move with user, and can release the hands of user, air is blown to human face and neck, to achieve the purpose of cooling and heat dissipation.

[0003] The neck fan generally includes the bracket that can be worn on the neck, the bracket has the shell on the both sides of human neck, the shell is provided with the air duct fan assembly in, the shell is provided with the air inlet and air outlet outside, fan assembly is inhaled from the air inlet and is transported to the air duct with the air of outside, and finally is blown out from the air outlet. But because in the traditional neck fan, the air duct inner wall structure is complex, air flow is large when flowing in the air duct, and flow is not smooth, leading to the low air outlet speed of air outlet, the small air outlet, and the poor blowing effect. UTILITARY MODEL CONTENTS

[0004] The utility model provides a neck fan in view of the deficiency of prior art, air flow is small when flowing in the air duct, flow is more smooth, and speed is high, so that the air outlet speed of neck fan is high, air outlet is large, and blowing effect is better.

[0005] To realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A neck fan, including the bracket that can be worn on the neck of human body, the bracket has the shell on the both sides of human neck, the shell is provided with the air inlet and first air outlet, the shell is provided with the air duct and fan assembly in, the air inlet and first air outlet are all communicated with air duct, and its characterized in that: the circumferential side in the air duct has the inner surface of smooth and without convex strip.

[0007] By being provided with the air duct with the inner surface of smooth and without convex strip, air flow is small when flowing in the air duct, flow is more smooth, and speed is high, so that the air outlet speed of first air outlet is high, air outlet is large, and blowing effect is better.

[0008] As a preferred scheme, the shell is provided with the inner container of hollow structure, the inner container extends along the length direction of shell, the air duct is arranged in the inner container, the second air outlet is arranged on the inner container, and the air duct, second air outlet and first air outlet are sequentially communicated.

[0009] As a preferred scheme, the shell is provided with the air deflector, and the air deflector and the inner wall of the shell form the air duct.

[0010] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0011] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0012] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0013] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0014] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0015] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0016] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0017] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0018] As a preferred solution, the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0019] The utility model discloses a kind of air ducts, which is characterized by the following technical solutions: the air duct is arranged in a trumpet shape, and a cross section of the air duct is proportionally reduced along an air flow direction.

[0020] To more clearly illustrate the structural features, technical means and the specific purposes and functions reached by the utility model, the utility model is further described in detail below by combining with the drawings and specific embodiments: BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1is the assembly structure schematic view of the embodiment of the utility model;

[0022] Figure 2 is the internal structure schematic view of the embodiment of the utility model;

[0023] Figure 3 is the inner container structure schematic view of the embodiment of the utility model;

[0024] Figure 4 is the inner container overhead schematic view of the embodiment of the utility model;

[0025] Figure 5 is Figure 4 the cross section schematic view of A-A in it;

[0026] Figure 6 is the fan assembly assembly schematic view of the embodiment of the utility model;

[0027] Figure 7 is the fan assembly exploded schematic view of the embodiment of the utility model.

[0028] The drawing mark explanation is as follows:

[0029] 10-support, 11-housing, 12-air inlet, 13-first air outlet, 14-extension end, 20-fan assembly, 21-duct, 22-first impeller, 221-first blade, 23-second impeller, 231-second blade, 232-first vent, 24-duct cover, 241-second vent, 30-inner container, 31-air duct, 32-second air outlet, 33-inner surface, 34-inlet, 35-air gathering part, 351-air gathering cavity. Specific implementation

[0030] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0031] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] As Figures 1-7 shown, the utility model discloses a kind of hanging neck fan, including the support 10 that can be worn on human neck, the support 10 has the shell 11 located human neck both sides, the shell 11 is equipped with air inlet 12 and first air outlet 13, air duct 31 and fan assembly 20 are equipped in the shell, the air inlet 12 and first air outlet 13 are all communicated with air duct 31, the air duct 131 extends along the length direction of shell 11, the circumferential side in the air duct 31 has smooth and without the inner surface 33 of protruding strip, the air duct 31's arc is 15 ° ~ 345 °, specifically, the air inlet 12 is equipped in the extension end 14 of shell 11, the fan assembly 20 is arranged between air inlet 12 and air duct 31.

[0033] The shell 11 is equipped with the inner container 30 of hollow structure, the inner container 30 extends along the length direction of shell 11, the air duct 31 is equipped in the inner container 30, the inner container 30 is equipped with second air outlet 32, the air duct 31, second air outlet 32 and first air outlet 13 are sequentially communicated;By setting the inner container 30 in shell 11, the air duct 31 is arranged in the inner container 30, so that air duct 31 and other spaces inside shell 11 are isolated from each other, the flow space of air is reduced, the flow speed of air in air duct 31 is faster, and the pressure is higher, thereby improving the air outlet speed.

[0034] The inner container 30 is detachably connected with the shell 11, for example, the inner container 30 and the shell 11 are connected by thread or clamped, by setting the detachable inner container 30, the inner container 30 can be manufactured separately, the circumferential side in the air duct 31 can be precisely processed by using a higher-precision way or equipment, so that the smoothness of the inner surface 33 is higher, or the inner container 30 can be formed by using a material with low friction coefficient, so as to minimize the air friction in the air duct 31 and make the air flow more smoothly;By using thread connection or clamping, the inner container 30 and the shell 11 are conveniently assembled and disassembled.

[0035] It should be noted that the utility model can also be provided with a wind deflector (not shown) in the shell 11, and the wind deflector and the inner wall of the shell 11 form the air duct 31.

[0036] The air duct 31 is arranged in a trumpet shape, and the cross section of the air duct 31 decreases proportionally along the air flow direction;By using the trumpet-shaped air duct 31, the cross section of the air duct 31 decreases proportionally along the air flow direction, so that the air pressure in the air duct 31 is consistent, and the air volume and speed of the first air outlet 13 are uniform, so that the blowing effect is better.

[0037] The larger end of the air duct 31 is provided with an inlet 34, and the ratio of the inner diameter of the inlet 34 to the inner diameter of the smaller end of the air duct 31 is 1-8; by adopting the ratio of the inner diameter of the larger end of the air duct 31 to the inner diameter of the smaller end of 1-8, the uniformity of the air volume and air speed blown out of the first air outlet 13 is optimal.

[0038] The inner diameter of the inlet 34 is 15-40 mm, and the inlet 34 is a circular inlet 34 or an elliptical inlet; by setting the circular inlet 34, the air flowing into the air duct 31 from the circular inlet 34 is more uniform.

[0039] The inner container 30 is provided with a wind collecting portion 35 on the outer surface, the wind collecting portion 35 is provided with a horn-shaped wind collecting cavity 351, the second air outlet 32 is arranged on the wind collecting portion 35, the air duct 31, the wind collecting cavity 351 and the second air outlet 32 are sequentially communicated, and the cross section of the wind collecting cavity 351 is reduced in proportion along the air flow direction; by setting the wind collecting portion 35, the horn-shaped wind collecting cavity 351 is arranged on the wind collecting portion 35, and the cross section of the wind collecting cavity 351 is reduced in proportion along the air flow direction, so that the air in the air duct 31 is pressurized after entering the wind collecting cavity 351 and blown out of the air outlet, thereby improving the air volume and air speed.

[0040] The inner container, the first air outlet 13 and the second air outlet 32 all extend in an arc shape along the length direction of the shell 11; by setting the inner container, the first air outlet 13 and the second air outlet 32 all extending in an arc shape along the length direction of the shell, the air blown out of the first air outlet 13 can form a uniform air wall, which has good wrapping property for the neck and head, thereby improving the comfort and body feeling of wearing.

[0041] The first air outlet 13 and the second air outlet 32 are both single long strip-shaped air outlets, or at least one of the first air outlet 13 and the second air outlet 32 is provided as a plurality of densely arranged sub-air outlets.

[0042] The extension length of the long strip-shaped air outlet is 100-200 mm, and the opening width b of the long strip-shaped air outlet is 1-7 mm; by adopting the long strip-shaped air outlet with the extension length of 100-200 mm and the opening width b of 2-15 mm, the long strip-shaped air outlet has an elongated structure, the air wall formed by blowing air has better wrapping property for the neck and head, the air is more concentrated, the air volume is large, and the speed is high.

[0043] The fan assembly 20 is arranged between the air inlet 12 and the inner container 30, the fan assembly 20 has a wind guide cylinder 21, a first impeller 22, a second impeller 23 and a motor (not shown), the first impeller 22 is arranged in the wind guide cylinder 21, the motor drives the first impeller 22 to rotate, a plurality of first blades 221 extending spirally are arranged on the periphery of the first impeller 22, the second impeller 23 is arranged at one end of the wind guide cylinder 21 close to the inner container 30, specifically, the second impeller 23 is arranged in an integrated mode with the wind guide cylinder 21, a plurality of second blades 231 extending spirally are arranged on the periphery of the second impeller 23, a first air vent 232 communicating with the air duct 31 is formed between adjacent two second blades 231, and the spiral directions of the second blades 231 and the first blades 221 are opposite; by arranging the second blades 231 and the first blades 221 extending in opposite spiral directions, the second blades 231 can prevent the air in the air duct from flowing back to the wind guide cylinder, so that the air pressure entering the air duct 31 is enhanced, and the blowing effect is improved.

[0044] The second blades 231 extend counterclockwise towards the first impeller 22, and the first blades 221 extend clockwise away from the second impeller 23; it can be understood that the second blades 231 can also extend clockwise towards the first impeller 22, and the first blades 221 correspondingly extend clockwise away from the second impeller 23.

[0045] The second impeller 23 and the inner container 30 are provided with a wind guide cover 24, a plurality of second air vents 241 are arranged on the wind guide cover 24, and the first air vent 232, the second air vent 241 and the air duct 31 are sequentially communicated; by arranging the wind guide cover 24, the air is uniformly dispersed and output through the second air vents 241 on the wind guide cover 24.

[0046] The motor is a high-speed motor, and the rotating speed of the high-speed motor is more than 6000 revolutions / minute.

[0047] The working principle of the first embodiment of the utility model is as follows: the motor is started, air passes through the air inlet 12, the wind guide cylinder 21, the first air vent 232, the second air vent 241, the air duct 31, the air collecting cavity 351 and the second air outlet 32 in sequence, and is finally blown out from the first air outlet 13.

[0048] As described above, the air duct 31 having the smooth inner surface 33 without protruding strips is arranged, the friction is small when the air flows in the air duct 31, the flow is more smooth, and the speed is high, so that the air outlet speed of the first air outlet 13 is high, the air outlet amount is large, and the blowing effect is better.

[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and thus any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical spirit of the present application still falls within the scope of the technical scheme of the present application.

Claims

1. A neck hanging fan, comprising a bracket wearable on a human neck, the bracket having a housing located on both sides of the human neck, the housing being provided with an air inlet and a first air outlet, an air duct and a fan assembly being provided within the housing, the air inlet and the first air outlet both being connected to the air duct, and characterized in that: The inner peripheral side of the air duct has a smooth inner surface without convex stripes.

2. The neck hanging fan according to claim 1, characterized in that: The shell is provided with an inner liner with a hollow structure, the inner liner extends along the length direction of the shell, the air duct is provided in the inner liner, a second air outlet is provided on the inner liner, and the air duct, the second air outlet and the first air outlet are connected in sequence.

3. The neck hanging fan according to claim 1, characterized in that: An air guide plate is provided in the shell, and the air duct is formed between the air guide plate and the inner wall of the shell.

4. The neck hanging fan according to claim 1, characterized in that: The air duct is arranged in a trumpet shape, and the cross section of the air duct decreases proportionally along the air flow direction.

5. The neck hanging fan according to claim 4, characterized in that: An inlet is provided at the larger end of the air duct, and the ratio of the inner diameter of the inlet to the inner diameter of the smaller end of the air duct is 1 to 8.

6. The neck hanging fan according to claim 5, characterized in that: The inner diameter of the inlet is 15 mm to 40 mm.

7. The neck hanging fan according to claim 6, characterized in that: The inlet is a circular inlet or an elliptical inlet.

8. The neck hanging fan according to claim 2, characterized in that: An air collecting portion is convexly provided on the outer surface of the inner tank, and a trumpet-shaped air collecting cavity is provided in the air collecting portion. The second air outlet is provided on the air collecting portion. The air duct, the air collecting cavity and the second air outlet are connected in sequence, and the cross-section of the air collecting cavity decreases proportionally along the direction of air flow.

9. The neck hanging fan according to claim 1, characterized in that: The air duct extends in an arc shape along the length direction of the shell, and the curvature of the air duct is 15° to 345°.

10. The neck hanging fan according to claim 2, characterized in that: The second air outlet is a single long strip air outlet or a plurality of sub-air outlets arranged at close intervals.

11. The neck hanging fan according to claim 10, characterized in that: The extended length of the long strip air outlet is 100mm to 200mm, and the opening width of the long strip air outlet is 2mm to 15mm.

12. The neck hanging fan according to claim 1, characterized in that: The fan assembly is arranged between the air inlet and the inner tank. The fan assembly has an air guide tube, a first impeller, a second impeller and a motor. The first impeller is arranged in the air guide tube. The motor drives the first impeller to rotate. The second impeller is arranged in the air guide tube near one end of the inner tank. The spiral direction of the first blade on the first impeller is opposite to that of the second blade on the second impeller.

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