CN106968973A - Axial flow blower - Google Patents

Abstract

The invention discloses an axial flow fan, comprising: a first axial flow wind wheel, on which a first fan blade is arranged; a second axial flow wind wheel, on which the second axial flow wind wheel is arranged On the air outlet side of the axial flow rotor, the second axial flow rotor is provided with a second fan blade, the bending direction of the first fan blade is opposite to that of the second fan blade; and a driving assembly, the driving assembly is the same as the first The axial flow wind wheel and the second axial flow wind wheel are respectively connected to drive the first axial flow wind wheel and the second axial flow wind wheel to rotate, the first axial flow wind wheel rotates around the first direction, and the second axial flow wind wheel rotates around the first direction Rotate in two directions, the second direction is opposite to the first direction. According to the axial flow fan of the present invention, the working speed and noise can be greatly reduced, or the air supply volume can be increased, or the geometric dimensions such as the diameter of the fan blade can be reduced, so as to improve the performance of the axial flow fan. At the same time, the reverse air supply can be effectively realized, and the two-way reversible fan can be realized.

Description

Axial Fan

technical field

The invention relates to the technical field of ventilation, in particular to an axial flow fan.

Background technique

At present, in the home appliance market at home and abroad, axial flow fans are widely used, such as air conditioners, refrigerators, electric fans, microwave ovens and other products. The air volume and noise are the main performance indicators of fans/fans, especially under certain conditions. The noise is low, and some scenes also require high wind speed and uniform distribution. The application of axial flow fans/fans in the home appliance market usually focuses on fan blades with a diameter of 70-900mm, a speed of 500-3000r/min, and an air volume of 40-1200m3/h. It has always been the goal of the industry to reduce the size and noise while increasing the air volume. With the development of advanced fluid technology and software and hardware science and technology, fan/fan design optimization to obtain the best air volume and reduce noise has become a common technology, but the industry's pursuit of miniaturization and large air volume of fans has never been end. At present, the aerodynamic noise of low-pressure axial flow fans/fans is still the main noise source of home appliances, and its main component is the rotating noise caused by the rotation of the impeller, which has become one of the main bottlenecks restricting the industry from further reducing the noise level of home appliances.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes an axial flow fan, which has the advantage of high performance.

The axial flow fan according to the embodiment of the present invention includes: a first axial flow wind wheel, the first fan blade is arranged on the first axial flow wind wheel; a second axial flow wind wheel, the second axial flow wind wheel It is arranged on the wind outlet side of the first axial flow rotor, and the second axial flow rotor is provided with a second fan blade, the bending direction of the first fan blade is different from the bending direction of the second fan blade The direction is opposite; and a driving assembly, the driving assembly is respectively connected with the first axial flow rotor and the second axial flow rotor to drive the first axial flow rotor and the second axial flow rotor Rotate, the first axial flow rotor rotates in a first direction, the second axial rotor rotates in a second direction, and the second direction is opposite to the first direction.

According to the axial flow fan of the embodiment of the present invention, the second axial flow wind wheel is arranged on the wind outlet side of the first axial flow wind wheel, and the second fan blade of the second axial flow wind wheel is connected with the first axial flow wind wheel. The bending direction of the first blade of the wheel is opposite, and at the same time, the rotation direction of the first axial flow wind wheel is opposite to that of the second axial flow wind wheel, which can greatly reduce the working speed and noise, or increase the air supply volume, or reduce Small fan blade diameter and other geometric dimensions improve the performance of the axial flow fan. At the same time, the reverse air supply can be effectively realized, and the two-way reversible fan can be realized.

According to some embodiments of the present invention, the extension line of the pivot axis of the second axial flow rotor coincides with the extension line of the pivot axis of the first axial flow rotor.

According to some embodiments of the present invention, the shape of the first fan blade is the same as that of the second fan blade.

According to some embodiments of the present invention, the size of the first fan blade is the same as that of the second fan blade.

According to some embodiments of the present invention, the minimum distance between the first fan blade and the second fan blade in the axial direction of the pivot shaft of the first axial flow impeller is L, and the L satisfies : L≥5mm.

According to some embodiments of the present invention, the drive assembly includes a drive motor, one of the first axial flow rotor and the second axial flow rotor is directly connected to the drive motor, and the other is connected to the The drive motor is connected through a transmission assembly.

According to some embodiments of the present invention, the drive assembly includes two drive motors, one of which is connected to the first axial flow rotor, and the other drive motor is connected to the second axial flow rotor connect.

In some embodiments of the present invention, the two driving motors are located between the first axial-flow rotor and the second axial-flow rotor.

In some embodiments of the present invention, the first axial flow rotor and the second axial flow rotor are located between the two driving motors.

In some embodiments of the present invention, one of the two driving motors is located between the first axial flow rotor and the second axial flow rotor.

In some embodiments of the present invention, the two drive motors are located on the side of the first axial flow rotor away from the second axial flow rotor or on the side of the second axial flow rotor away from the One side of the first axial flow wind wheel.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of an axial flow fan according to an embodiment of the present invention;

2 is a schematic structural view of an axial flow fan according to another embodiment of the present invention;

3 is a schematic structural view of an axial flow fan according to another embodiment of the present invention;

Fig. 4 is a schematic structural diagram of an axial flow fan according to another embodiment of the present invention.

Reference signs:

Axial fan 100,

The first axial flow wind wheel 1, the first fan blade 11,

The second axial flow wind wheel 2, the second fan blade 21,

Drive motor 3, support 4.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "inner", "outer", "clockwise", "counterclockwise", "axial", etc. are based on the drawings The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as an important aspect of the present invention. limits. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The following describes an axial flow fan 100 according to an embodiment of the present invention with reference to FIGS. 1-4 .

As shown in FIGS. 1-4 , an axial flow fan 100 according to an embodiment of the present invention includes a first axial flow rotor 1 , a second axial flow rotor 2 and a driving assembly.

Specifically, the first fan blade 11 is arranged on the first axial flow rotor 1 , the second axial flow rotor 2 is arranged on the air outlet side of the first axial flow rotor 1 , and the second axial flow rotor 2 is A second fan blade 21 is provided, and the bending direction of the first fan blade 11 is opposite to that of the second fan blade 21 . The driving assembly is respectively connected with the first axial flow rotor 1 and the second axial flow rotor 2 to drive the first axial flow rotor 1 and the second axial flow rotor 2 to rotate, and the first axial flow rotor 1 rotates in the first direction Rotate, the second axial flow wind wheel 2 rotates around the second direction, the second direction is opposite to the first direction.

As shown in Figure 1, the first axial flow wind wheel 1 can rotate clockwise, the second axial flow wind wheel 2 can rotate counterclockwise, the wind can enter from the side of the first axial flow wind wheel 1, and flow from the second axis Blowing out from two sides of the air flow wheel, this structure greatly improves the performance of the axial flow fan 100. In the case of the same size and speed, the air volume can be greatly increased, and the maximum air volume at zero static pressure can be increased by more than 60%; Under certain circumstances, the speed can be greatly reduced, up to 50%; under the same air volume and speed, the geometric size can be reduced, up to 35%; under the premise of maintaining the performance of the original axial flow fan 100 , The noise can be reduced by up to 10 decibels by changing the rotational speed and geometric dimensions.

At the same time, by changing the rotation direction of the first axial flow rotor 1 and the second axial flow rotor 2, effective reverse air supply can be realized, and the reverse wind volume is generally 65% of the forward air volume, and the highest can reach 70%. ~80%, the reverse wind pressure is 50% of the forward operation wind pressure, and the reverse air supply volume of ordinary ventilators is only 30-40%. In addition, the second fan blade 21 is specially designed according to the airflow angle, which can realize both forward air supply and reverse air extraction, and the performance of the two cases is basically the same, such as reverse flow and wind pressure and forward flow and wind pressure Basically equal.

In related technologies, in order to meet the heat dissipation and ventilation needs of household appliances, it is difficult to reduce the working speed and reduce the geometric size to achieve the goal of reducing noise and miniaturization when the electric fan/fan used meets a certain air volume; Under the speed, it is difficult to achieve the goal of reducing the geometric size and increasing the air volume to achieve ventilation, heat dissipation requirements and miniaturization; under a certain geometric size, it is difficult to achieve the goal of large air volume and low speed; in short, low speed, low noise, small size The large air volume has become the main contradiction and bottleneck in the performance improvement of conventional axial flow fans/fans.

According to the axial fan 100 of the embodiment of the present invention, the second axial fan 2 is arranged on the air outlet side of the first axial fan 1, and the second fan blade 21 of the second axial fan 2 is connected to the The bending direction of the first blade 11 of the first axial flow rotor 1 is opposite, and at the same time, the rotation direction of the first axial flow rotor 1 is opposite to that of the second axial flow rotor 2, which can greatly reduce the operating speed and noise , or increase the air volume of the air supply, or reduce the geometric dimensions such as the diameter of the fan blade, so as to improve the performance of the axial flow fan 100 . At the same time, the reverse air supply can be effectively realized, and the two-way reversible fan can be realized.

In some embodiments of the present invention, as shown in FIGS. 1-4 , the extension line of the pivot axis of the second axial flow rotor 2 coincides with the extension line of the pivot axis of the first axial flow rotor 1 . Thus, the size of the axial flow fan 100 can be better reduced, the noise and the rotating speed of the axial flow fan 100 can be reduced, the air volume of the axial flow fan 100 can be increased, and the performance of the axial flow fan 100 can be improved.

In some embodiments of the present invention, as shown in FIGS. 1-4 , the shape of the first fan blade 11 is the same as that of the second fan blade 21 . Thus, not only can the structure of the axial flow fan 100 be simplified, the production period can be saved, and the production cost can be reduced, but the size of the axial flow fan 100 can also be better reduced, the noise and the rotating speed of the axial flow fan wheel can be reduced, and the speed of the axial flow fan 100 can be improved. The air volume improves the performance of the axial flow fan 100.

Of course, as shown in FIGS. 1-4 , the size of the first fan blade 11 is the same as that of the second fan blade 21 . Not only can the structure of the axial flow fan 100 be simplified, the production cycle can be saved, and the production cost can be reduced, but also the size of the axial flow fan 100 can be better reduced, the noise and speed of the axial flow fan wheel can be reduced, and the air volume of the axial flow fan 100 can be increased. Improve the performance of the axial flow fan 100.

In some embodiments of the present invention, the minimum distance between the first fan blade 11 and the second fan blade 21 in the axial direction of the pivot shaft of the first axial flow impeller 1 is L, and L satisfies: L≥5mm . Thus, during the rotation of the first axial flow rotor 1 and the second axial flow rotor 2, the collision between the first fan blade 11 and the second fan blade 21 can be prevented, thereby improving the working reliability of the axial flow fan 100 .

In some embodiments of the present invention, the drive assembly includes a drive motor 3, one of the first axial flow rotor 1 and the second axial flow rotor 2 is directly connected to the drive motor 3, and the other is connected to the drive motor 3 through a transmission Components such as gear components etc. are connected. Thereby, the cost of driving the motor 3 can be reduced.

In other embodiments of the present invention, as shown in FIGS. 1-4 , the drive assembly includes two drive motors 3, one of which is connected to the first axial-flow wind wheel 1, and the other drive motor 3 is connected to the first The two axial flow wind wheels 2 are connected. In this way, the independent control of the first axial flow rotor 1 and the second axial flow rotor 2 is facilitated.

In some examples of the present invention, as shown in FIG. 2 , two driving motors 3 are located between the first axial flow rotor 1 and the second axial flow rotor 2 . In some other examples of the present invention, as shown in FIG. 1 , the first axial flow rotor 1 and the second axial flow rotor 2 are located between two drive motors 3 . In some other examples of the present invention, as shown in FIG. 4 , one of the two driving motors 3 is located between the first axial flow rotor 1 and the second axial flow rotor 2 . In some other examples of the present invention, as shown in FIG. 3 , the two driving motors 3 are located on the side of the first axial flow rotor 1 away from the second axial flow rotor 2 or on the side of the second axial flow rotor 2 The side away from the first axial flow rotor 1 .

It should be noted that the positions of the drive motor 3 and the first axial flow rotor 1 and the second axial flow rotor 2 can be designed according to user needs.

In some embodiments of the present invention, more sets of axial flow impellers can also be used, as long as the bending direction of the blades of each set of axial flow impellers and the rotation direction of the axial flow impellers are reasonably designed to ensure the realization of small Low speed, low noise, and large air volume are enough.

Other components of the axial-flow wind wheel according to the embodiments of the present invention, such as nuts, pins, etc., may use conventional electric fan components.

The following describes an axial flow fan 100 according to four specific embodiments of the present invention with reference to FIGS. limit.

Embodiment one

As shown in Figure 1, the axial flow fan 100 of the present invention mainly includes a first axial flow wind wheel 1, a second axial flow wind wheel 2 and two drive motors 3, and the two drive motors 3 are respectively connected to other structures through a bracket 4 For example, the casing is connected, and the first axial flow rotor 1 and the second axial flow rotor 2 are located between two driving motors 3 . The first fan blade 11 is arranged on the first axial flow wind wheel 1, and the second fan blade 21 is arranged on the second axial flow wind wheel 2. The first fan blade 11 utilizes a shaft end nut and a pin and a drive motor 3 close to it. The rotation direction is clockwise. The second fan blade 21 is connected and fixed with the drive motor 3 close to it by using the shaft end nut and pin. The rotation direction is counterclockwise. The bending direction of the first fan blade 11 is Opposite to the bending direction of the second blade 21, in the axial direction of the pivot shaft of the first axial flow impeller 1, the minimum distance between the first blade 11 and the second blade 21 is L, and L satisfies: L ≥5mm.

Wherein, the extension line of the pivot axis of the first axial flow rotor 1 coincides with the extension line of the pivot axis of the second axial flow rotor 2 , and the size and shape of the first fan blade 11 and the second fan blade 21 are the same.

In the case of the same size and speed, the air volume can be greatly increased, and the maximum air volume of zero static pressure can be increased by more than 60%; under the same size and air volume, the speed can be greatly reduced, and the maximum can be reduced by more than 50%. In the case of the same rotation speed, the geometric size can be reduced by a maximum of more than 35%; on the premise of maintaining the performance of the original axial flow fan 100, the noise can be reduced by more than 10 decibels by changing the rotation speed and geometric size.

According to the axial flow fan 100 of the present invention, the reverse air supply can be effectively realized, and the performance of the axial flow fan 100 can be greatly improved: the working speed and noise can be greatly reduced, or the air volume of the air supply can be greatly increased, or the fan blades can be greatly reduced Geometric dimensions such as diameter.

Embodiment two

As shown in Figure 2, the structure of this embodiment is substantially the same as that of Embodiment 1, wherein the same components use the same reference numerals, the only difference is that the two drive motors 3 are located on the first axial flow wind wheel 1 and the second Between 2 axial flow wind wheels.

Embodiment Three

As shown in Figure 3, the structure of this embodiment is substantially the same as that of Embodiment 1, wherein the same components use the same reference numerals, the only difference is that the two drive motors 3 are located far away from the first axial flow wind wheel 1 One side of the second axial flow wind wheel 2.

Embodiment Four

As shown in Fig. 4, the structure of this embodiment is substantially the same as that of Embodiment 1, wherein the same components use the same reference numerals, the only difference is that the drive motor 3 that drives the second axial flow wind wheel 2 is located at the first Between the axial flow wind wheel 1 and the second axial flow wind wheel 2 , the drive motor 3 for driving the first axial flow wind wheel 1 is located on the side of the first axial flow wind wheel 1 away from the second axial flow wind wheel 2 .

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (11)

1. a kind of axial flow blower, it is characterised in that including：

First axial-flow windwheel, first axial-flow windwheel is provided with the first flabellum；

Second axial-flow windwheel, second axial-flow windwheel is located at the air-out side of first axial-flow windwheel, the second axle stream Wind wheel is provided with the second flabellum, and the bending direction of first flabellum is opposite with the bending direction of second flabellum；With

Drive component, the drive component is connected to drive respectively with first axial-flow windwheel, second axial-flow windwheel State the first axial-flow windwheel and second axial-flow windwheel is rotated, first axial-flow windwheel is rotated around first direction, described second Axial-flow windwheel is rotated around second direction, and the second direction is opposite to the first direction.

2. axial flow blower according to claim 1, it is characterised in that the extension line of the pivotal axis of second axial-flow windwheel Overlapped with the extension line of the pivotal axis of first axial-flow windwheel.

3. axial flow blower according to claim 1, it is characterised in that the shape of first flabellum and second flabellum Shape it is identical.

4. axial flow blower according to claim 1, it is characterised in that the size of first flabellum and second flabellum Size it is identical.

5. axial flow blower according to claim 1, it is characterised in that in the axis of the pivotal axis of first axial-flow windwheel On direction, the minimum range between first flabellum and second flabellum is L, and the L is met：L≥5mm.

6. axial flow blower according to claim 1, it is characterised in that the drive component includes a motor, institute One stated in the first axial-flow windwheel and second axial-flow windwheel is directly connected to the motor, and another drives with described Dynamic motor is connected by transmission component.

7. axial flow blower according to claim 1, it is characterised in that the drive component includes two motors, its In a motor be connected with first axial-flow windwheel, another described motor and second axial-flow windwheel Connection.

8. axial flow blower according to claim 7, it is characterised in that two motors are located at the first axle stream Between wind wheel and second axial-flow windwheel.

9. axial flow blower according to claim 7, it is characterised in that first axial-flow windwheel and the second axle stream wind Wheel is located between two motors.

10. axial flow blower according to claim 7, it is characterised in that one in two motors is located at institute State between the first axial-flow windwheel and second axial-flow windwheel.

11. axial flow blower according to claim 7, it is characterised in that two motors are respectively positioned on described first The side of remote second axial-flow windwheel of axial-flow windwheel or remote first axial-flow windwheel of second axial-flow windwheel Side.