CN210343781U

CN210343781U - Fan with double fan blades

Info

Publication number: CN210343781U
Application number: CN201920994304.2U
Authority: CN
Inventors: 沈泽; 沈建君; 陈迪飞
Original assignee: NINGBO KADEER ELECTRICAL APPLIANCES CO Ltd
Current assignee: NINGBO KADEER ELECTRICAL APPLIANCES CO Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-04-17
Anticipated expiration: 2029-06-28

Abstract

A fan with double fan blades comprises a base, a supporting rod connected to the base, a motor assembly arranged at the upper end of the supporting rod, a circuit control board electrically connected with the motor assembly, a fan blade assembly in transmission connection with the motor assembly, and a fan cover wrapping the fan blade assembly, wherein the fan blade assembly comprises a hub, a plurality of large fan blades annularly arranged on the periphery of the hub, and a plurality of small fan blades annularly arranged on the periphery of the hub, the large fan blades and the small fan blades are distributed at intervals, and the small fan blades are positioned on the rear side of the large fan blades; the fan housing includes air inlet after-hood and air-out front shroud, and the air-out front shroud includes air-out dustcoat and air-out inner cover, is equipped with first arc water conservancy diversion muscle on the air-out dustcoat, from outer to interior U type water conservancy diversion muscle and the butt joint of second arc water conservancy diversion muscle of being equipped with in proper order in extremely on the air-out inner cover, the tip and the first arc water conservancy diversion muscle butt joint of U type water conservancy diversion muscle, the butt joint of second arc water conservancy diversion muscle and the insole department of U type water conservancy diversion muscle. The utility model discloses the air-out is powerful, the silence more is close to natural wind, still feels very comfortable after long-time the use.

Description

Fan with double fan blades

Technical Field

The utility model belongs to the technical field of the electric fan and specifically relates to a fan with two flabellums.

Background

The fan is called fan, fan, it is a household electric appliance which uses motor to drive fan blade to rotate, and can make air quickly circulate, and is mainly used for cooling, relieving summer heat and circulating air. The product is widely used in places such as families, classrooms, offices, shops, hospitals, hotels and the like.

The fan mainly comprises a fan head, blades, a mesh enclosure, a control device and the like. The fan head comprises a motor, front and rear end covers, a head-shaking air supply mechanism and the like. The main components of the electric fan are: an AC motor. The working principle is as follows: the electrified coil is forced to rotate in the magnetic field. Electrical energy is converted into mechanical energy, while due to the coil resistance, inevitably a part of the electrical energy is converted into thermal energy.

The fan impeller commonly used in our daily life generally consists of a hub and a plurality of blades located on the outer circumference of the hub, and generally, the larger the blades of the fan are, the higher the wind speed is, but the larger the blades are, the lower the strength of the blades is. When the strength of the blades is not enough and the outer ends are unstable, a serious vortex phenomenon can be generated, and the service life of the whole impeller is influenced. In addition, the traditional mode has the characteristics of high noise and over-concentrated wind power, and people feel uncomfortable after blowing for a long time.

Disclosure of Invention

In order to overcome the above insufficiency of the prior art, the utility model provides a fan that has two flabellums of silence and soft air-out.

The technical proposal of the utility model for solving the technical problem is that: a fan with double fan blades comprises a base, a supporting rod connected to the base, a motor assembly arranged at the upper end of the supporting rod, a circuit control board electrically connected with the motor assembly, a fan blade assembly in transmission connection with the motor assembly, and a fan cover wrapping the fan blade assembly, wherein the fan blade assembly comprises a hub, a plurality of large fan blades annularly arranged on the periphery of the hub, and a plurality of small fan blades annularly arranged on the periphery of the hub, the large fan blades and the small fan blades are distributed at intervals, and the small fan blades are positioned on the rear side of the large fan blades;

the fan housing include the air inlet after cover and air-out front shroud, the air-out front shroud include air-out dustcoat and air-out inner cover, the air-out dustcoat on be equipped with first arc water conservancy diversion muscle, the air-out in cover from outer to interior U type water conservancy diversion muscle and the second arc water conservancy diversion muscle of being equipped with in proper order, the tip of U type water conservancy diversion muscle with first arc water conservancy diversion muscle butt joint, second arc water conservancy diversion muscle with the butt joint of insole department of U type water conservancy diversion muscle.

Preferably, the first arc-shaped flow guide rib, the U-shaped flow guide rib and the second arc-shaped flow guide rib form an inverted S-shaped integral flow guide rib together.

Preferably, the air outlet inner cover is in a five-blade windmill shape, and the number of the large fan blades and the number of the small fan blades are both 5.

Preferably, a plurality of bulges are arranged on the inner edge of the air outlet outer cover, positioning grooves are formed in the bulges, and locking ports are formed between every two adjacent bulges;

the outer edge of the air outlet inner cover is convexly provided with positioning ribs, positioning fixture blocks are arranged between adjacent positioning ribs, the positioning ribs are inserted into the positioning grooves, and the positioning fixture blocks are buckled into the locking ports.

Preferably, a ventilation gap is formed between the large fan blade and the small fan blade.

Preferably, the supporting rod is an adjustable telescopic supporting rod.

Preferably, a reinforcing rib is further arranged between the adjacent U-shaped flow guide ribs.

The beneficial effects of the utility model reside in that: the fan blade assembly can make air outlet stronger and more silent when in use under the same motor power through a special combination form of the large fan blade and the small fan blade, and simultaneously reduce the impact of airflow on the large fan blade and the small fan blade, so that the large fan blade and the small fan blade have longer service life and are more stable and reliable to use; and the air outlet front cover provided with the first arc-shaped flow guide rib, the U-shaped flow guide rib and the second arc-shaped flow guide rib is matched, so that the air outlet is softer and closer to natural wind, and the user still feels very comfortable after long-time use.

Drawings

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

Fig. 2 is an exploded view of the present invention.

FIG. 3 is a schematic view of a fan blade assembly.

Fig. 4 is a schematic structural view of the air outlet housing.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

Fig. 6 is an enlarged schematic view of the air outlet inner cover.

Fig. 7 is a schematic structural view of the fan cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 7, a fan with double fan blades comprises a base 1, a support rod 2 connected to the base 1, a motor assembly 3 arranged at the upper end of the support rod 2, a circuit control board electrically connected with the motor assembly 3, a fan blade assembly in transmission connection with the motor assembly 3, and a fan cover wrapping the fan blade assembly, wherein the fan blade assembly comprises a hub 4, a plurality of large fan blades 5 annularly arranged on the periphery of the hub 4, and a plurality of small fan blades 6 annularly arranged on the periphery of the hub 4, the large fan blades 5 and the small fan blades 6 are distributed at intervals, and the small fan blades 6 are positioned at the rear side of the large fan blades 5;

the fan housing include air inlet after cover 7 and air-out front shroud, the air-out front shroud include air-out dustcoat 8 and air-out inner cover 9, air-out dustcoat 8 on be equipped with first arc water conservancy diversion muscle 10, air-out inner cover 9 on from outer to interior U type water conservancy diversion muscle 11 and the second arc water conservancy diversion muscle 12 of being equipped with in proper order, the tip of U type water conservancy diversion muscle 11 with first arc water conservancy diversion muscle 10 butt joint, second arc water conservancy diversion muscle 12 with the butt joint of insole department of U type water conservancy diversion muscle 11.

The utility model discloses a cover before air-out is by outer to interior first arc water conservancy diversion muscle 10, U type water conservancy diversion muscle 11 and the second arc water conservancy diversion muscle 12 order of arranging that adopts in proper order, and it is mainly more chaotic relatively to consider one section air current when the air-out between the outer end of little flabellum 6 and big flabellum 5, consequently adopts the U type water conservancy diversion muscle 11 that intensity is higher, the conductivity is stronger in this district section to ensure whole good air-out effect and result of use. And, in order to prevent air exhaust outwards straightly, adopt curved water conservancy diversion muscle shape, can make the air-out more soft nature.

In this embodiment, the first arc-shaped flow guiding rib 10, the U-shaped flow guiding rib 11 and the second arc-shaped flow guiding rib 12 together form an inverted S-shaped integral flow guiding rib. The structure setting of this embodiment is adopted for first arc water conservancy diversion muscle 10, U type water conservancy diversion muscle 11 and second arc water conservancy diversion muscle 12 fuse together in the molding, can not carry out the segmentation of will to the air-out, thereby make the air-out more natural soft, and more pleasing to the eye in the appearance.

Preferably, the air outlet inner cover 9 is in a five-blade windmill shape, and the number of the large fan blades 5 and the small fan blades 6 is 5. In this preferred scheme, the shape of air-out inner cover 9 has been injectd, makes it and the quantity phase-match of big flabellum 5 and little flabellum 6 to it is more harmonious pleasing to the eye in the whole outward appearance.

In this embodiment, the inner edge of the air outlet housing 8 is provided with a plurality of protrusions 13, the protrusions 13 are provided with positioning grooves 14, and locking ports 15 are further arranged between adjacent protrusions 13; the outer edge of the air outlet inner cover 9 is convexly provided with positioning ribs 16, positioning clamping blocks 17 are arranged between the adjacent positioning ribs 16, the positioning ribs 16 are inserted into the positioning grooves 14, and the positioning clamping blocks 17 are buckled into the locking ports 15. Through the cooperation of location muscle 16 and constant head tank 14 to and the cooperation of location buckle and locking port 15, can make air-out dustcoat 8 and air-out inner cover 9 link together firmly, and replaced traditional screw fixation's mode, make the dismouting more convenient, be favorable to improving the efficiency of production assembly, and the clean maintenance when later stage uses.

In this embodiment, a ventilation gap 18 exists between the large fan blade 5 and the small fan blade 6. The ventilation gap 18 can enable the large fan blade 5 and the small fan blade 6 to generate a negative pressure air suction effect when in operation, so that the whole air outlet is stronger under the condition of the same power; moreover, the structure can effectively disperse and reduce the pressure of the airflow on the large fan blade 5 and the small fan blade 6, thereby reducing the strength requirement of the large fan blade 5 and the small fan blade 6 in production and manufacturing, and further greatly reducing the production cost of the large fan blade 5 and the small fan blade 6.

In this embodiment, the support rod 2 is an adjustable telescopic support rod. Through the setting of flexible bracing piece, the user can carry out lifting control by oneself according to the demand of difference to satisfy more user demands.

In this embodiment, a reinforcing rib 19 is further disposed between adjacent U-shaped flow guiding ribs 11. Through the setting of strengthening rib 19 for U type water conservancy diversion muscle 11's intensity is higher, can bear stronger air current impact force.

The utility model discloses a method of use is unanimous with current fan, no longer gives unnecessary details one by one here.

The fan blade component of the utility model can make the air outlet stronger and more silent when in use under the same motor power through the special combination form of the big fan blade 5 and the small fan blade 6, and simultaneously reduce the impact of the air flow on the big fan blade 5 and the small fan blade 6, so that the service life of the big fan blade 5 and the small fan blade 6 is longer, and the use is more stable and reliable; and the air outlet front cover provided with the first arc-shaped flow guide rib 10, the U-shaped flow guide rib 11 and the second arc-shaped flow guide rib 12 is matched, so that the air outlet is softer and closer to natural wind, and the user still feels very comfortable after long-time use.

Claims

1. The utility model provides a fan with two flabellums, includes the base, connects at the bracing piece of base, sets up at the motor element of upper end of the support bar, the circuit control board of being connected with the motor element electricity, the flabellum subassembly of being connected with the motor element transmission and the fan housing of parcel flabellum subassembly, its characterized in that: the fan blade assembly comprises a hub, a plurality of large fan blades annularly arranged on the periphery of the hub, and a plurality of small fan blades annularly arranged on the periphery of the hub, wherein the large fan blades and the small fan blades are distributed at intervals, and the small fan blades are positioned on the rear side of the large fan blades;

2. The fan with dual blades as claimed in claim 1, wherein: the first arc-shaped flow guide rib, the U-shaped flow guide rib and the second arc-shaped flow guide rib form an inverted S-shaped integral flow guide rib together.

3. The fan with dual blades as claimed in claim 1, wherein: the air outlet inner cover is in a five-blade windmill shape, and the number of the large fan blades and the small fan blades is 5.

4. The fan with dual blades as claimed in claim 1, wherein: the inner edge of the air outlet outer cover is provided with a plurality of bulges, the bulges are provided with positioning grooves, and locking ports are arranged between the adjacent bulges;

5. The fan with dual blades as claimed in claim 1, wherein: and a ventilation gap is formed between the large fan blade and the small fan blade.

6. The fan with dual blades as claimed in claim 1, wherein: the support rod is an adjustable telescopic support rod.

7. The fan with dual blades as claimed in claim 1, wherein: and reinforcing ribs are also arranged between the adjacent U-shaped flow guide ribs.