CN215595932U

CN215595932U - Axial flow fan

Info

Publication number: CN215595932U
Application number: CN202120841086.6U
Authority: CN
Inventors: 程守炤; 覃万翔; 齐凤; 叶涛
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-01-21
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses an axial flow fan, which comprises a hub, a first blade group and at least one second blade group, wherein the hub is provided with a plurality of first blades; the first blade group includes a plurality of first blades arranged along a circumferential direction of the hub; the second blade group includes a plurality of second blades arranged along a circumferential direction of the hub; wherein the profile of the second blade is different from the profile of the first blade group. The fan is provided with the first blade group and the second blade group, and the blade profile of the first blade is different from that of the second blade, so that the air supply diameter of the outlet air of the fan is ensured, and the air supply distance of the outlet air of the fan is increased.

Description

Axial flow fan

Technical Field

The utility model relates to the field of fans, in particular to an axial flow fan.

Background

The existing axial flow fan comprises a hub and a plurality of blades, wherein the blades are annularly arrayed and fixedly connected on the outer peripheral surface of the hub, and the blades are of a single blade profile, so that the air supply distance of the air outlet of the fan is short.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an axial flow fan capable of increasing the air supply distance.

An axial fan according to an embodiment of a first aspect of the present invention includes a hub, a first blade group, and at least one second blade group; the first blade group includes a plurality of first blades arranged along a circumferential direction of the hub; the second blade group includes a plurality of second blades arranged along a circumferential direction of the hub; wherein the profile of the second blade is different from the profile of the first blade group.

The axial flow fan provided by the embodiment of the utility model at least has the following technical effects: be equipped with first blade group and second blade group, and the blade profile of first blade is inequality with the blade profile of second blade, and then both guaranteed the air supply diameter of fan air-out, improves the air supply distance of fan air-out again.

According to some embodiments of the utility model, the profile of the second blade is airfoil shaped.

According to some embodiments of the utility model, each of the second blades is located between two of the first blades in the axial direction.

According to some embodiments of the utility model, the first blade comprises a first leading edge, a first outer edge, a first trailing edge and a first inner edge, the first inner edge being connected with the hub; the second blade comprises a second leading edge, a second outer edge, a second trailing edge and a second inner edge, and the second inner edge is connected with the hub; the chord length of the first leading edge is greater than the chord length of the second leading edge, the chord length of the first outer edge is greater than the chord length of the second outer edge, the chord length of the first trailing edge is greater than the chord length of the second trailing edge, and the chord length of the first inner edge is greater than the chord length of the second inner edge.

According to some embodiments of the utility model, the second set of blades is mounted below the first set of blades.

According to some embodiments of the utility model, the first blade rotates about the axis of the hub, the outermost edge of the first blade being at a perpendicular distance from the hub axis of the first blade of outer diameter a; the second blade rotates around the axis of the hub, and the perpendicular distance between the outermost edge of the second blade and the axis of the hub is the outer diameter B of the second blade; the length of the outer diameter A is different from the length of the outer diameter B.

According to some embodiments of the utility model, the length of the outer diameter a is greater than the length of the outer diameter B.

According to some embodiments of the utility model, the first blades and the second blades are alternately arranged in the circumferential direction of the hub.

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

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a plan view of an axial flow fan according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of an axial flow fan of the first embodiment;

fig. 3 is a schematic structural view of an axial flow fan according to a second embodiment.

Reference numerals: hub 100, first blade group 200, first blade 210, first leading edge 211, first outer edge 212, first trailing edge 213, first inner edge 214, second blade group 300, second blade 310, second leading edge 311, second outer edge 312, second trailing edge 313, second inner edge 314.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, a plurality means two or more, and the larger is understood as not including the essential number. It should be understood that the description related to the orientation, such as the upper, lower, etc., indicates an orientation or positional relationship based on that shown in the drawings. This is done solely for the purpose of facilitating the description of the utility model and simplifying the description without indicating or implying that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the utility model.

In the description of the present invention, unless otherwise specifically limited, installation and connection terms should be construed broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in consideration of the technical details.

Referring to fig. 1, an axial flow fan according to an embodiment of the present invention includes a hub 100, a first blade group 200, and at least one second blade group 300; the first blade group 200 includes a plurality of first blades 210, the plurality of first blades 210 being arranged along a circumferential direction of the hub 100; the second blade group 300 includes a plurality of second blades 310, the plurality of second blades 310 being arranged along a circumferential direction of the hub 100; wherein, the profile of the second blade 310 is different from the profile of the first blade group 200.

As shown in fig. 1, 2 and 3, the blade profile of the first blade 210 is different from the blade profile of the second blade 310, so that the advantages and the disadvantages of the two blades are complemented to increase the air outlet distance of the fan, and the second blade set 300 may be one set, two sets or two sets; for example, taking only one second blade group 300 as an example, the first blade 210 may adopt the blade profile of a conventional axial flow outdoor unit air conditioning fan, and the second blade 310 may adopt a conventional aerospace wing profile design method (airfoil shape). The first blade 210 is characterized in that the air volume is large at the same rotating speed, but the pressure resistance is poor, the air dispersion is serious, and the central area of the air outlet hub 100 almost has no air; the second blade 310 has the characteristics of high efficiency, good pressure resistance and concentrated air outlet, but the air supply diameter is small, and the air outlet range is mainly concentrated in the area within the outer diameter of the fan blade profile; combine together first blade 210 and second blade 310, and then complement advantage and shortcoming between them for the fan is under with the rotational speed, and the amount of wind is big, efficient, the crushing resistance is better, the air-out is comparatively concentrated, the air supply diameter is big, and then both guarantee the air supply diameter of fan air-out, improve the air supply distance of fan air-out again.

In some embodiments of the present invention, as shown in fig. 2, each second blade 310 is located between two first blades 210 in the axial direction. The design is to shorten the height of the hub 100, so that the first blade group 200 and the second blade group 300 share one hub 100, and the lower surface of the first blade 210 and the upper surface of the second blade 310 are closer.

In some embodiments of the present invention, as shown in FIG. 1, first blade 210 includes a first leading edge 211, a first outer edge 212, a first trailing edge 213, and a first inner edge 214, first inner edge 214 being connected to hub 100; the second blade 310 comprises a second leading edge 311, a second outer edge 312, a second trailing edge 313 and a second inner edge 314, the second inner edge 314 being connected to the hub 100; the chord length of the first leading edge 211 is greater than the chord length of the second leading edge 311, the chord length of the first outer edge 212 is greater than the chord length of the second outer edge 312, the chord length of the first trailing edge 213 is greater than the chord length of the second trailing edge 313, and the chord length of the first inner edge 214 is greater than the chord length of the second inner edge 314. The arrangement is such that the first blade set 200 and the second blade set 300 are arranged as long and short blades, thereby ensuring that the wind is in the middle of the axial flow fan. The chord length of the first leading edge 211 is the length between the two ends of the first leading edge 211, the chord length of the first outer edge 212 is the length between the two ends of the first outer edge 212, the chord length of the first trailing edge 213 is the length between the two ends of the first trailing edge 213, and the chord length of the first inner edge 214 is the distance between the two ends of the first inner edge 214; second leading edge 311, second outer edge 312, second trailing edge 313, and second inner edge 314 are also distances between the two endpoints.

In some embodiments of the present invention, as shown in fig. 3, the second blade group 300 is installed below the first blade group 200. This is designed to allow the first blade group 200 and the second blade group 300 to be layered for easy processing.

In some embodiments of the present invention, as shown in FIG. 1, the first blade 210 rotates about the axis of the hub 100, the outermost edge of the first blade 210 being at a perpendicular distance from the axis of the hub 100 of the outer diameter A of the first blade 210; the second blade 310 rotates around the axis of the hub 100, and the outer diameter B of the second blade 310 is perpendicular to the axis of the hub 100 at the outermost edge of the second blade 310; the length of outer diameter a is different from the length of outer diameter B. The arrangement is such that the first blade set 200 and the second blade set 300 are arranged as long and short blades, thereby ensuring that the wind is in the middle of the axial flow fan. Specifically, the length of outer diameter A is greater than the length of outer diameter B.

In some embodiments of the present invention, as shown in fig. 1 and 2, the first blades 210 and the second blades 310 are alternately arranged along the circumferential direction of the hub 100.

In the description herein, references to the description of "some embodiments" or "what is conceivable" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An axial flow fan, comprising:

a hub;

a first blade group including a plurality of first blades arranged along a circumferential direction of the hub;

at least one second blade group comprising a plurality of second blades arranged along a circumferential direction of the hub;

wherein the profile of the second blade is different from the profile of the first blade group.

2. The axial fan according to claim 1, wherein: the second blade has an airfoil shape.

3. The axial fan according to claim 1 or 2, wherein: in the axial direction, each of the second blades is located between two of the first blades.

4. The axial fan according to claim 1, wherein: the first blade comprises a first leading edge, a first outer edge, a first trailing edge and a first inner edge, the first inner edge being connected to the hub; the second blade comprises a second leading edge, a second outer edge, a second trailing edge and a second inner edge, and the second inner edge is connected with the hub; the chord length of the first leading edge is greater than the chord length of the second leading edge, the chord length of the first outer edge is greater than the chord length of the second outer edge, the chord length of the first trailing edge is greater than the chord length of the second trailing edge, and the chord length of the first inner edge is greater than the chord length of the second inner edge.

5. The axial fan according to claim 1, wherein: the second blade group is installed below the first blade group.

6. The axial fan according to claim 1 or 4, wherein: the first blade rotates around the axis of the hub, and the perpendicular distance between the outermost edge of the first blade and the axis of the hub is the outer diameter A of the first blade; the second blade rotates around the axis of the hub, and the perpendicular distance between the outermost edge of the second blade and the axis of the hub is the outer diameter B of the second blade; the length of the outer diameter A is different from the length of the outer diameter B.

7. The axial fan according to claim 6, wherein: the length of the outer diameter a is greater than the length of the outer diameter B.

8. The axial fan according to claim 1, wherein: the first blades and the second blades are alternately arranged along the circumferential direction of the hub.