CN212479644U

CN212479644U - Hang neck formula fan

Info

Publication number: CN212479644U
Application number: CN202020750521.XU
Authority: CN
Inventors: 蔡演强
Original assignee: Foshan Shunde Deerma Electric Appliances Co Ltd
Current assignee: Guangdong Delma Technology Co Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-02-05
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses a hanging neck type fan, which comprises a hanging ring hung on the neck of a human body and a head part extended downwards from the two ends of the hanging ring, wherein the head part is provided with an air cavity, a fan impeller is contained in the air cavity, the fan impeller comprises a hub and a plurality of fan blades uniformly distributed around the excircle of the hub, the fan blades are bent along the circumferential direction of the hub and are arc-shaped, the roots of the fan blades are arranged in parallel with the axis of the hub, and the centrifugal force generated by the rotation of the impeller is utilized to drive an air flow to move along the radial direction of the fan blades, so that stronger air pressure can be obtained compared with the prior art; the wind chamber has air intake, air outlet, and the lateral wall in wind chamber is from the air outlet to the air intake narrowing gradually and is lou hopper-shaped, and fan impeller's flabellum is narrowed gradually from one end and is matchd with the lateral wall in wind chamber to the wheel hub center pin, and the wind chamber guide of the wind warp funnel form that fan impeller blew off blows off from the air outlet, and powerful wind pressure makes the air supply distance elongated, and the wind-force that the human body was experienced can be stronger more obvious to reach better cooling effect.

Description

Hang neck formula fan

Technical Field

The utility model relates to a hang neck formula fan.

Background

In order to realize cooling in summer, a neck hanging fan is provided in recent years, the neck hanging fan is hung on a hanging ring at the neck of a human body, the head parts with the fans at the two ends are used for fanning and cooling the human body, the neck hanging fan can be carried outdoors for use without being held by hands, and the two hands are in a free activity state, so that the neck hanging fan is convenient to work or play.

However, at present, the neck-hung fan adopts an axial flow fan, the size of an impeller is reduced in consideration of portability of carrying, air volume and air pressure brought by the axial flow fan are greatly reduced, and the air supply distance is insufficient, so that the wind power felt by a human body is small, and the effect of quickly cooling is difficult to achieve; the increase of the wind power only needs to enlarge the volume of the fan blades to increase the wind sweeping area or adopt a high-power high-rotation-speed motor, but the enlargement of the volume of the fan blades can increase the head of the hanging neck type fan, influence the appearance and simultaneously are not convenient to carry and use; the electric energy consumed by adopting the high-power high-rotating-speed motor is large, and for portable products, the electric quantity of the battery is not enough to supply the motor for working for a long time, so that improvement from other aspects is needed.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a small hanging neck type fan with strong air volume.

The utility model provides a technical scheme that its technical problem adopted is:

a neck hanging type fan comprises a hanging ring hung on the neck of a human body, and heads extending downwards from two ends of the hanging ring, wherein the head is provided with an air cavity, a fan impeller is accommodated in the air cavity, the fan impeller comprises a hub and a plurality of fan blades uniformly arranged around the outer circle of the hub, the fan blades are bent along the circumferential direction of the hub and are arc-shaped, and the fan blades are arranged in parallel with the axis of the hub; the wind chamber has air intake, air outlet, and the lateral wall in wind chamber narrows gradually to the air intake from the air outlet and is hourglass hopper-shaped, and the flabellum of fan wheel narrows the lateral wall that matches with the wind chamber gradually to the wheel hub center pin from one end gradually.

The head comprises a shell and an air guide cover which is arranged in the shell, the air guide cover is arranged around the fan impeller so as to form the air cavity, the front end and the rear end of the air guide cover respectively form the air inlet and the air outlet, and the air inlet is positioned in front of the fan impeller.

The air outlet of the air guide cover is covered with a fan protection net which is positioned behind the fan impeller.

The fan protection net is characterized in that a containing groove for containing a motor is formed in the middle of the fan protection net, and a motor shaft of the motor is connected with the fan impeller in a penetrating mode.

From the inner chamber of wheel hub court fan protection net direction is protruding to be stretched and is formed a boss, and the boss is equipped with the motor shaft cooperation of shaft hole and motor, the holding tank cover is located outside the boss.

The wind scooper extends towards the fan protection net to form a positioning plate, and the fan protection net is correspondingly provided with a positioning groove for inserting the positioning plate.

The inner wall of the shell of the head is provided with a plurality of clamping platforms which are buckled on the clamping grooves on the outer wall of the air guide cover to fix the air guide cover. The fan protection net is provided with fixing lugs penetrating through the screws and fixed with the shell.

The fan blades protrude forwards from the front end of the hub to form a cavity between the front of the hub and the air inlet of the air guide cover, so that external air is directly sucked into the gaps between the fan blades of the cavity and enters the air guide cover.

The utility model has the advantages that: the utility model discloses fan impeller's flabellum is the arcuation with wheel hub's axis parallel arrangement and blade bending, utilizes impeller pivoted centrifugal force, drives the air current along flabellum radial movement, compares among the prior art fan under the equal size can obtain more powerful wind pressure to blow off from the air outlet through the wind cavity guide of funnel form, powerful wind pressure makes the air supply distance elongated, and the wind-force that the human body was experienced can be stronger more obvious, thereby reaches better cooling effect.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of the head of the present invention;

fig. 3 is a schematic exploded view of the present invention;

fig. 4 is a schematic structural view of the fan impeller of the present invention;

fig. 5 is a schematic structural view of the wind scooper and the fan protection net.

Detailed Description

Referring to fig. 1 to 5, a neck-hanging fan includes a hanging ring 1 hung on the neck of a human body and a head 2 extending downward from two ends of the hanging ring, the head 2 has an air cavity 3, a fan impeller 4 is accommodated in the air cavity, the fan impeller 4 includes a hub 41 and a plurality of blades 42 uniformly arranged around the outer circle of the hub 41, the blades 42 extend from the side wall of the hub 41, the joint of the blades 42 and the hub 41 is the root of the blades 42, the root is arranged in parallel with the axis of the hub 41, and the blades 42 are curved and arc-shaped along the circumference of the hub 41, and the air flows in the radial direction of the blades by using the centrifugal force of the rotation of the impeller, thereby realizing radial air outlet, and obtaining stronger wind pressure compared with the fan with the same size in the prior art; wind chamber 3 has the air intake, the air outlet, the lateral wall in wind chamber 3 narrows gradually to the air intake from the air outlet and is lou hopper-shaped, centrifugal fan impeller 4's flabellum 42 narrows gradually to wheel hub 41 center pin from one end and cooperates with the lateral wall in wind chamber 3, the wind that fan impeller 4 radially blew off blows to the human body along the wall in hourglass hopper-shaped wind chamber 3, therefore the air supply distance is longer for stronger wind pressure, the wind-force that the human body was experienced can be stronger more obvious, thereby reach better cooling effect.

As the preferred scheme of the utility model, head 2 includes casing 21 and the built-in wind scooper 5 in casing 21, and wind scooper 5 covers and locates around fan wheel 4 to form wind chamber 3, air intake, the air outlet that both ends formed respectively around the wind scooper 5, the air intake is located fan wheel 4 the place ahead. The air outlet of the air guiding cover 5 is also covered with a fan protecting net 7, and the fan protecting net 7 is positioned behind the fan impeller 4 to prevent a human body from stretching into the air cavity 3 and being scratched by the fan impeller 4. The motor 6 for driving the fan impeller 4 is accommodated in the accommodating groove 72 in the middle of the fan protection net 7, in this embodiment, the motor 6 is a brushless dc motor in the prior art, and includes a motor stator and a motor rotor shaft, the boss 43 is formed by protruding from the inner cavity of the hub 41 toward the fan protection net 7, the boss 43 is provided with a shaft hole, the motor rotor shaft of the motor 6 is inserted into the shaft hole, the fan protection net 7 extends toward the hub 41 to form a fixing column 73, the motor stator of the motor 6 is installed on the fixing column 73, the fan impeller 4 is installed on the motor stator through the motor rotor shaft on the hub 41, the motor rotor shaft is a permanent magnet material, and after the motor stator is electrified, a magnetic field is generated to interact with the motor rotor shaft magnet, so that the motor rotor shaft rotates, and the fan impeller 4 is driven to rotate. The fixing post 73 extends into the inner cavity of the hub 41, and the accommodating groove 72 is sleeved outside the boss 43 and the fixing post 73, so that the structure in the air cavity 3 is more compact, the volume of the head 2 is further reduced, and the portability of the neck hanging fan is improved.

The head shell 21 is divided into an inner part and an outer part, the fan protection net 7 is provided with a fixing lug 73, a screw penetrates through the fixing lug 74 to be fastened with the inner wall of the inner part of the head shell 21, and the fan protection net 7 is fixed firstly. The positioning plate 51 extends towards the fan protection net 7 of the wind scooper 5, the positioning groove 71 for inserting the positioning plate 51 is correspondingly arranged on the fan protection net 7, and the positioning installation of the wind scooper 5 and the fan protection net 7 is realized through the matching of the positioning groove 71 and the positioning plate 51. Meanwhile, the inner wall of the head shell 21 is provided with a plurality of clamping platforms 22 which are buckled on clamping grooves 52 on the outer wall of the air guide cover 5 to fix the air guide cover 5; finally, the outer part and the inner part of the head housing 21 are covered and fixed.

The fan blades 42 of the fan impeller protrude forwards from the front end of the hub 41 to form a cavity 23 in front of the hub 41, more space is reserved at the air inlet of the air guide cover 5 for the fan blades to wind and suck air, the air inlet efficiency is improved, external air is directly sucked into the fan blade gaps of the cavity 23 through the air inlet and enters the air guide cover 5, the fan blades 42 drive air flow to move along the radial direction, air pressure is generated, the air is blown out along the front end of the air guide cover 5, and safe and efficient air blowing is achieved.

It should be noted that the present invention uses the reference of the air inlet direction in the front and back direction, the air inlet is front and the air outlet is back.

Claims

1. The utility model provides a hang neck formula fan, includes to hang and establishes link (1) and link both ends downwardly extending at human neck and be equipped with head (2), its characterized in that: the head (2) is provided with an air cavity (3), a fan impeller (4) is contained in the air cavity, the fan impeller (4) comprises a hub (41) and a plurality of fan blades (42) which are uniformly arranged around the outer circle of the hub (41), the fan blades (42) are bent along the circumferential direction of the hub (41) and are arc-shaped, and the roots of the fan blades (42) are arranged in parallel with the axis of the hub (41); the wind cavity (3) is provided with an air inlet and an air outlet, the side wall of the wind cavity (3) is gradually narrowed from the air outlet to the air inlet to form a funnel shape, and the fan blades (42) of the fan impeller (4) are gradually narrowed from one end to the central shaft of the hub (41) to be matched with the side wall of the wind cavity (3).

2. The hanging neck fan of claim 1, wherein: the head (2) comprises a shell (21) and an air guide cover (5) which is arranged in the shell (21), the air guide cover (5) is arranged around the fan impeller (4) in a covering mode to form the air cavity (3), the front end and the rear end of the air guide cover (5) are respectively provided with the air inlet and the air outlet, and the air inlet is located in front of the fan impeller (4).

3. The hanging neck type fan as claimed in claim 2, wherein: the air outlet of the air guide cover (5) is covered with a fan protection net (7), and the fan protection net (7) is located behind the fan impeller (4).

4. The hanging neck fan of claim 3, wherein: the fan protection net (7) is provided with a containing groove (72) in the middle for installing the motor (6), and a motor shaft of the motor (6) is connected with the fan impeller (4) in a penetrating manner.

5. The hanging neck fan of claim 4, wherein: from the inner chamber of wheel hub (41) is towards fan protection net (7) direction protrusion forms a boss (43), and boss (43) are equipped with the motor shaft cooperation of shaft hole and motor (6), holding tank (72) cover is located outside the boss.

6. The hanging neck fan of claim 4, wherein: the motor (6) is a brushless direct current motor, the fan protection net (7) extends towards the hub (41) to form a fixing column (73), and the motor (6) is mounted on the fixing column (73) and extends into the inner cavity of the hub (41).

7. The hanging neck fan of claim 3, wherein: the air guide cover (5) is provided with a positioning plate (51) extending towards the fan protection net (7), and the fan protection net (7) is correspondingly provided with a positioning groove (71) for inserting the positioning plate (51).

8. The hanging neck fan of claim 3, wherein: the inner wall of the shell (21) of the head part (2) is provided with a plurality of clamping platforms (22) which are buckled on clamping grooves (52) on the outer wall of the air guide cover (5) to fix the air guide cover (5).

9. The hanging neck type fan as claimed in claim 3 or 8, wherein: the fan protection net (7) is provided with a fixing lug (74) penetrating through a screw, and is fixed with the shell (21).

10. The hanging neck type fan as claimed in claim 2, wherein: the fan blades (42) protrude forwards from the front end of the hub (41) to form a cavity (23) between the front of the hub (41) and the air inlet of the air guide cover, so that outside air is directly sucked into a fan blade gap of the cavity (23) and enters the air guide cover (5).