CN215486752U

CN215486752U - Laminated fan capable of avoiding air leakage

Info

Publication number: CN215486752U
Application number: CN202121636542.XU
Authority: CN
Inventors: 许文昉; 许嘉恒
Original assignee: Yiyi Jiangxi Electronic Technology Co ltd
Current assignee: Yiyi Jiangxi Electronic Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-01-11
Anticipated expiration: 2031-07-19

Abstract

The utility model relates to the field of cooling fans, and discloses a laminated fan capable of avoiding air flow leakage, which comprises: the first impeller is provided with a first impeller set and a first inner annular wall, the first impeller set comprises a plurality of first blades with two ends, and the first inner annular wall is connected between the two ends of the first blades; the second fan wheel is provided with a second fan blade group and a second inner annular wall, the second fan blade group comprises a plurality of second fan blades with two ends, the second inner annular wall is connected between the two ends of the second fan blades, and one part of the first fan blade group and one part of the second fan blade group are mutually overlapped; the airflow caused by the rotation of the first fan wheel is shielded by the first inner annular wall and does not leak, and the airflow caused by the rotation of the second fan wheel is shielded by the second inner annular wall and does not leak, so that the expected wind pressure and air supply quantity are generated.

Description

Laminated fan capable of avoiding air leakage

Technical Field

The utility model relates to the field of cooling fans, in particular to a laminated fan capable of preventing air flow from leaking.

Background

The laminated fan comprises a plurality of fan wheels, the fan blades among the fan wheels are partially laminated, and the fan blades of the fan wheels are partially laminated to increase the wind pressure, so that the trouble of additionally installing a wind guide pressurizing structure is avoided. However, even though the existing laminated fan can increase the wind pressure, the airflow with increased wind pressure still leaks along the radial length direction of the fan wheel, and the wind pressure and the air volume of the laminated fan cannot reach the expectation.

Therefore, how to design a fan capable of improving the above-mentioned drawbacks is a problem to be solved.

Disclosure of Invention

The utility model aims to provide a laminated fan capable of avoiding air flow leakage, and aims to provide a technical scheme capable of solving the problems.

A laminated fan capable of preventing leakage of an air current, comprising: the first impeller is provided with a first impeller set and a first inner annular wall, the first impeller set comprises a plurality of first blades with two ends, and the first inner annular wall is connected between the two ends of the first blades; the second fan wheel is provided with a second fan blade group and a second inner annular wall, the second fan blade group comprises a plurality of second fan blades with two ends, the second inner annular wall is connected between the two ends of the second fan blades, and one part of the first fan blade group and one part of the second fan blade group are mutually overlapped; the air flow caused by the rotation of the first fan wheel is shielded by the first inner annular wall and does not leak, and the air flow caused by the rotation of the second fan wheel is shielded by the second inner annular wall and does not leak.

Compared with the prior art, the utility model has the beneficial effects that: the laminated fan with increased wind pressure can be ensured to have the effect of preventing the air flow from leaking, and further the expected wind pressure and air supply quantity are generated.

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

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded perspective view of a laminated fan of the present invention.

Fig. 2 is a plan view of the first and second fan wheels in the laminated fan of the present invention.

Fig. 3 is a perspective assembly view of the laminated fan of the present invention.

Fig. 4 is a plan view of the laminated fan of the present invention after assembly.

Fig. 5 is a sectional view of the laminated fan of the present invention after being assembled.

In the figure: 1: a first fan wheel, 11: a first hub, 12: a first fan blade group, 121: a first fan blade, 1211: an inner blade, 1212: an outer blade, 13: a first inner annular wall, 131: an inner wall, 132: an outer wall, 2: a second fan wheel, 21: a second hub, 22: a second fan blade group, 221: a second fan blade, 2211: an inner blade, 2212: an outer blade, 23: a second inner annular wall, 231: an inner wall, 232: an outer wall, 3: a bearing structure, 31: a frame body, 32: an enclosing wall, C: a laminating area, M: a mandrel, and R: a wheel periphery.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the present invention provides a laminated fan (hereinafter referred to as laminated fan) capable of preventing air flow from leaking, including: the first fan wheel 1 and the second fan wheel 2, in particular, also comprise a carrying structure 3. The number of the first impeller 1 and the second impeller 2 is not limited in the present invention, and the number of each impeller may be one, two, or three or more, as long as any two adjacent impellers (the first impeller 1 and the second impeller 2) of the impellers can be partially stacked, and in this embodiment, one first impeller 1 and two second impellers 2 are taken as an example for description.

The supporting structure 3 may be any structure capable of supporting the fan wheels, and may be a fan base or a fan frame, which is not limited in the present invention, and the supporting structure 3 in this embodiment is described by taking the fan base as an example. The carrying structure 3 has a frame 31 and preferably also a circumferential enclosing wall 32.

The first fan wheel 1 and the second fan wheel 2 both have a spindle M, and the novel stacked fan has an axial direction D1 parallel to the spindle M and a radial direction D2 perpendicular to the axial direction D1 as shown in fig. 1.

The first impeller 1 has a first hub 11, a first set of blades 12 and a first inner annular wall 13. Wherein the first wheel housing 11 has a wheel circumference R (see fig. 2). The first blade set 12 includes a plurality of first blades 121, each first blade 121 has two ends: a connecting end (i.e., an inner end, not labeled with a reference numeral) and a free end (i.e., an outer end, not labeled with a reference numeral), the connecting end of each first blade 121 is connected to the wheel periphery R in a surrounding manner, and each first blade 121 extends from the wheel periphery R from the inside to the outside and forms the free end at the extending end. The first inner annular wall 13 is connected between the connection end and the free end of each first blade 121.

The second impeller 2 has a second hub 21, a second set of blades 22 and a second inner annular wall 23. Wherein the second wheel housing 21 has a wheel circumference R. The second blade set 22 includes a plurality of second blades 221, each second blade 221 has two ends: a connecting end (i.e., an inner end, not labeled with a reference numeral) and a free end (i.e., an outer end, not labeled with a reference numeral), the connecting end of each second blade 221 is connected to the wheel periphery R in a surrounding manner, and each second blade 221 extends from the wheel periphery R from the inside to the outside and forms the free end at the extending end. The second inner annular wall 23 is connected between the connecting end and the free end of each second blade 221.

The first fan wheel 1 and each second fan wheel 2 are rotatably connected to the frame 31 of the supporting structure 3, such that the first fan wheel 1 and each second fan wheel 2 are arranged side by side along the radial direction D2, and a portion of the first fan blade set 12 and a portion of the second fan blade set 22 are stacked at an interval along the axial direction D1 (see fig. 5), and as for the other portions of the first fan blade set 12 and the other portions of the second fan blade set 22, they are not stacked. Preferably, as shown in fig. 5, the first hub 11 and each of the second hubs 21 are disposed at the same height, in this case, the first vane set 12 is disposed around the lower (or upper) half of the first hub 11, and the second vane set 22 is disposed around the upper (or lower) half of the second hub 21, such that the first vane set 12 and the second vane set 22 are offset from each other in the axial direction D1, and thus, even if some of the first vane set 12 and the second vane set 22 are stacked on each other, they can rotate respectively without colliding; specifically, the outer blades 1212 (described later) of the first blade group 12 are annularly provided on the lower (or upper) half of the first hub 11, and only the outer blades 2212 (described later) of the second blade group 22 are annularly provided on the upper (or lower) half of the second hub 21, so that they are offset from each other and can be rotated separately.

Therefore, as shown in fig. 3 to 5, when the first fan wheel 1 and the second fan wheels 2 rotate, the airflow caused by the first fan wheel 1 is shielded by the first inner annular wall 13 and does not leak along the radial direction D2, and the airflow caused by the second fan wheels 2 is shielded by the second inner annular wall 23 and does not leak along the radial direction D2. In other words, this novel range upon range of fan can have the effect that can avoid the air current to leak along radial D2 by first interior rampart 13 and the second interior rampart 23 that add, and then produce and accord with anticipated wind pressure and air supply volume.

Preferably, as shown in fig. 1, 2 and 4, each of the first blades 121 and each of the second blades 221 includes an

inner blade

1211, 2211 and an

outer blade

1212, 2212, and the first inner annular wall 13 and the second inner annular wall 23 each have an

inner wall

131, 231 and an

outer wall

132, 232 opposite to each other. The inner blade 1211 of each first blade 121 spans between the circumference R of the first hub 11 and the inner wall 131 of the first inner annular wall 13, and one end of the outer blade 1212 of each first blade 121 is connected to the outer wall 132 of the first inner annular wall 13; the inner blade 2211 of each second blade 221 spans between the wheel periphery R of the second hub 21 and the inner wall 231 of the second inner annular wall 23, and one end of the outer blade 2212 of each second blade 221 is connected to the outer wall 232 of the second inner annular wall 23; it should be noted that the inner blades 1211 and the outer blades 1212 of the first impeller 1 are disposed alternately, and the inner blades 2211 and the outer blades 2212 of the second impeller 2 are also disposed alternately. Therefore, the effect of preventing the air flow from leaking out can be further improved.

It should be noted that, as shown in fig. 5, the portion of the first fan blade set 12 and the portion of the second fan blade set 22 that are stacked at an interval may be a stacked area C formed by stacking the outer blades 1212 of the first fan blades 121 and the outer blades 2212 of the second fan blades 221 at an interval, so as to effectively increase the wind pressure and the air blowing amount by the stacked area C while avoiding the air leakage.

In addition, as shown in fig. 2 to fig. 5, since the supporting structure 3 has the surrounding enclosing wall 32 as described above, and all the fan wheels (the first fan wheel 1 and the second fan wheel 2) of the present invention are accommodated in the enclosing wall 32, and the contour shape of the enclosing wall 32 corresponds to the contour shape of all the fan wheels (the first fan wheel 1 and the second fan wheel 2), the enclosing wall 32 also has the effect of preventing the air flow from leaking out along the radial direction D2.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A laminated fan capable of preventing leakage of air flow, comprising:

the first impeller is provided with a first impeller set and a first inner annular wall, the first impeller set comprises a plurality of first blades with two ends, and the first inner annular wall is connected between the two ends of the first blades; and

the second impeller is provided with a second impeller blade group and a second inner annular wall, the second impeller blade group comprises a plurality of second impeller blades with two ends, the second inner annular wall is connected between the two ends of the second impeller blades, and one part of the first impeller blade group and one part of the second impeller blade group are mutually overlapped;

the air flow caused by the rotation of the first fan wheel is shielded by the first inner annular wall and does not leak, and the air flow caused by the rotation of the second fan wheel is shielded by the second inner annular wall and does not leak.

2. The laminated fan capable of preventing air leakage according to claim 1, wherein: the first fan wheel is also provided with a first hub, and one end of the two ends of the first fan blade is connected with the first hub; the second impeller is also provided with a second hub, and one end of the two ends of the second fan blade is connected with the second hub.

3. The laminated fan capable of preventing air leakage according to claim 2, wherein: the first inner ring wall is provided with an inner wall and an outer wall which are opposite to each other, the first fan blade comprises an inner blade and an outer blade, the inner blade is bridged between the first hub and the inner wall of the first inner ring wall, and the outer blade is connected to the outer wall of the first inner ring wall.

4. A laminated fan capable of preventing air flow from leaking out as claimed in claim 3, wherein: the inner blade and the outer blade of the first fan blade are arranged in a staggered mode.

5. A laminated fan capable of preventing an air flow from leaking out as claimed in any one of claims 2 or 3, wherein: the second inner ring wall is provided with an inner wall and an outer wall which are opposite to each other, the second fan blade comprises an inner blade and an outer blade, the inner blade is bridged between the second hub and the inner wall of the second inner ring wall, and the outer blade is connected to the outer wall of the second inner ring wall.

6. The laminated fan capable of preventing air leakage according to claim 5, wherein: the inner blade and the outer blade of the second fan blade are arranged in a staggered mode.

7. The laminated fan capable of preventing air leakage according to claim 1, wherein: the fan also comprises a bearing structure, the first fan wheel and the second fan wheel are both rotatably connected with the bearing structure, the bearing structure is provided with a surrounding wall, and the first fan wheel and the second fan wheel are surrounded by the surrounding wall together.