CN218266428U - Fan - Google Patents

Abstract

The utility model discloses a fan belongs to the wind power equipment field. The fan includes: the device comprises a shell, an air inlet housing, an air outlet housing, a dust separation net, a first dust collection bin and a fan assembly; the shell is provided with an accommodating cavity, an air inlet and an air outlet, and the fan assembly comprises a driving motor and an impeller which are coaxially connected; the fan assembly is positioned in the accommodating cavity, the air inlet housing is connected to the air inlet, the air outlet housing is connected to the air outlet, and the dust separation net is positioned between the air inlet housing and the side part of the impeller; the first dust collection bin is positioned below the impeller and used for collecting impurities doped in the airflow output by the impeller. The fan can realize circulation of clean air flow.

Description

Fan

Technical Field

The utility model relates to a wind power equipment field, in particular to fan.

Background

The fan is a kind of air supply equipment, the low-speed air current enters from the air inlet side of the fan, forms the high-speed air current through the rotatory impeller and discharges from the air outlet side.

In the related art, the casing of the fan is hollowed, and the blades of the impeller are exposed in the hollowed casing, that is, the blades of the impeller are exposed outside through the hollowing, so that the blades are easy to accumulate dust, thereby polluting the circulating airflow.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a fan can solve the problem that the circulating air current of fan is polluted by the dust.

Specifically, the method comprises the following technical scheme:

a fan, the fan comprising: the device comprises a shell, an air inlet housing, an air outlet housing, a dust separation net, a first dust collection bin and a fan assembly;

the shell is provided with an accommodating cavity, an air inlet and an air outlet, and the fan assembly comprises a driving motor and an impeller which are coaxially connected;

the fan assembly is positioned in the accommodating cavity, the air inlet housing is connected to the air inlet, the air outlet housing is connected to the air outlet, and the dust separation net is positioned between the air inlet housing and the side part of the impeller;

the first dust collection bin is positioned below the impeller and used for collecting impurities doped in the airflow output by the impeller.

In some possible implementations, the first dust bin includes: the top bin wall, the first side bin wall, the bottom bin wall and the second side bin wall are sequentially connected end to end;

the wall of the top bin is provided with a first dust falling hole which is communicated with the inner cavity of the first dust collecting bin.

In some possible implementations, a top surface of the top bulkhead facing the impeller has a windward area, and the first dust drop hole is disposed in the windward area.

In some possible implementations, the top bin wall is an arcuate wall with a first end located obliquely above a second end of the arcuate wall;

the windward region is closer to the first end of the curved wall.

In some possible implementations, an air flow buffer area is disposed in the inner cavity of the first dust collecting bin, and the air flow buffer area allows the air flow entering from the first dust falling hole to move in the inertial direction for a set distance.

In some possible implementations, the fan further includes: the second dust collecting bin is provided with a second dust falling hole;

the bottom of the air inlet housing and the dust separation net are positioned in the second dust falling hole.

In some possible implementations, the bottom of the air inlet housing has a dust falling plate, and the second dust falling hole includes: a first gap segment, a second gap segment, and a third gap segment;

the first gap section is formed between the air inlet housing and the corresponding side of the second dust collecting bin;

the second gap section is formed between the dust separation net and the corresponding side of the second dust collection bin;

the third gap section is formed between the dust falling plate and the dust separation net.

In some possible implementations, the width of the second dust falling hole satisfies the following condition: a is more than or equal to 1.05 x (H1 + H2);

wherein A is the width of the second dust falling hole;

h1 is the distance between the dust separation net and the bottom of the air inlet housing;

h2 is the sum of the wall thicknesses of the dust separation net and the air inlet housing.

In some possible implementations, the bottom wall of the second dust bin is arranged obliquely such that one end of the bottom wall of the second dust bin is located below the other end.

In some possible implementations, the length L of the air inlet _in And the length L of the air outlet _out The following conditions are satisfied: 2.5L _out ＜L _in ＜2.8L _out ；

And the number of the first and second groups,

the included angle alpha between the central axis of the air inlet and the central axis of the air outlet meets the following conditions: alpha is more than 25 degrees and less than 90 degrees.

The embodiment of the utility model provides a technical scheme's beneficial effect includes at least:

the embodiment of the utility model provides a fan places the holding intracavity of casing in the impeller, and the interval arrangement air inlet housing and dust separation net are located to the air intake of impeller, come to carry out twice dust separation to external air inlet stream, reduce the carrying volume of air inlet stream to impurity such as dust. Furthermore, the inlet air flow is accelerated by the impeller to form a high-speed air flow, and the first dust collecting bin is arranged below the impeller, so that a local clearance cavity is formed between the impeller and the first dust collecting bin, the high-speed air flow can reduce the pressure and the speed in the local clearance cavity to increase the density of impurities such as dust carried in the air flow, the probability that the impurities such as the dust are collected by the first dust collecting bin is promoted, the collection of the impurities such as the dust carried in the air flow by the first dust collecting bin is realized, the deposition of the impurities such as the dust on the impeller is obviously reduced, and the circulation of clean air flow can be realized by the fan.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a combination view of a fan according to an embodiment of the present invention;

fig. 2 is an exploded view of a fan according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a fan according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a first dust collecting bin and a second dust collecting bin provided by the embodiment of the present invention;

FIG. 5 is a partially enlarged view of the first dust collecting chamber provided in the embodiment of the present invention;

fig. 6 is a partial enlarged view of a second dust collecting bin according to an embodiment of the present invention;

fig. 7 is another cross-sectional view of a fan provided by an embodiment of the present invention;

fig. 8 is a schematic diagram of a relationship between an interval between the air inlet cover and the dust separation net and an air inlet speed according to an embodiment of the present invention.

The reference numerals denote:

1. a housing;

11. an accommodating cavity; 12. an air inlet; 13. an air outlet;

2. an air inlet housing; 21. a dust falling plate;

3. an air outlet housing;

4. a dust-proof net;

5. a first dust collecting bin;

51. a top bin wall; 52. a first side bulkhead; 53. a bottom bin wall; 54. a second side wall;

55. a first dust falling hole; 56. an airflow buffer zone;

6. a drive motor;

7. an impeller;

8. a second dust collecting bin;

81. a second dust falling hole; 811. a first gap section; 812. a second gap segment; 813. a third gap segment.

There have been shown in the drawings and will hereinafter be described in detail specific embodiments of the invention. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing and simplifying the description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. When the product is placed in different positions, the orientation may change, for example, "up" and "down" may be interchanged.

In the related art, the casing of the fan is hollowed, and the blades of the impeller are exposed in the hollowed casing, that is, the blades of the impeller are exposed outside through the hollowing, so that the blades are easy to accumulate dust, thereby polluting the outlet air.

To solve the problem that the fan in the related art is easy to accumulate dust to cause the pollution of the circulating air flow, the embodiment of the present invention provides a fan, as shown in fig. 1 and fig. 2, comprising: the air conditioner comprises a shell 1, an air inlet housing 2, an air outlet housing 3, a dust separation net 4, a first dust collection bin 5 and a fan assembly. Wherein, casing 1 has holding chamber 11, air intake 12 and air outlet 13 to, the fan subassembly includes coaxial coupling's driving motor 6 and impeller 7.

As can be further seen from fig. 3, the fan assembly is located in the accommodating cavity 11, the air inlet housing 2 is connected to the air inlet 12, the air outlet housing 3 is connected to the air outlet 13, and the dust separation net 4 is located between the air inlet housing 2 and the side of the impeller 7; the first dust collecting bin 5 is positioned below the impeller 7, and the first dust collecting bin 5 is used for collecting impurities doped in the airflow output by the impeller 7.

The embodiment of the utility model provides a fan places casing 1's holding chamber 11 in impeller 7 in, locates interval arrangement air inlet housing 2 and dust separation net 4 at impeller 7's air intake 12, comes to carry out twice dust separation to external air inlet stream, reduces the carrying capacity of air inlet stream to impurity such as dust. Further, the inlet air flow is accelerated by the impeller 7 to form a high-speed air flow, and the first dust collecting bin 5 is arranged below the impeller 7, so that a local clearance cavity is formed between the impeller 7 and the first dust collecting bin 5, the high-speed air flow can reduce the pressure and speed in the local clearance cavity to increase the density of impurities such as dust carried in the air flow, the probability that the impurities such as dust are collected by the first dust collecting bin 5 is promoted, the collection of the impurities such as dust carried in the air flow by the first dust collecting bin 5 is realized, the deposition of the impurities such as dust on the impeller 7 is obviously reduced, and the circulation of clean air flow can be realized by the fan.

The structure and the function of each component in the fan related to the embodiment of the present invention are exemplarily described below:

in some examples, the fan provided by the embodiments of the present invention is a cross-flow fan, which is in a tower column shape, a cylinder shape, a rectangular tube shape, etc., and accordingly, the airflow channel inside the accommodating cavity 11 of the housing 1 is a cross-flow duct. When the fan is a cross-flow fan, the fan blade hiding device also has the advantage of hiding the fan blades of the impeller 7, and is more beneficial to reducing the deposition of impurities such as dust on the impeller 7.

With respect to the first dust collecting bin 5, which is disposed below the impeller 7, facilitating the first dust collecting bin 5 to be located at a windward position, in some examples, as shown in fig. 4, the first dust collecting bin 5 comprises: a top bin wall 51, a first side bin wall 52, a bottom bin wall 53 and a second side bin wall 54 which are connected end to end in sequence; as can be seen from fig. 5, the top bin wall 51 has a first dust falling hole 55, and the first dust falling hole 55 is communicated with the inner cavity of the first dust collecting bin 5.

The top bin wall 51 is positioned below the impeller 7, after the high-speed airflow is subjected to pressure reduction and speed reduction in a clearance cavity between the top bin wall 51 and the impeller 7, the airflow subjected to pressure reduction and speed reduction contacts the top bin wall 51 in the circulation process, and impurities such as dust carried in the airflow are collected into an inner cavity of the first dust collection bin 5 through the first dust falling holes 55.

In some examples, a top surface of the top bulkhead 51 facing the impeller 7 has a windward region, and the first dust drop hole 55 is disposed in the windward region. The windward area can contact with the airflow, and the windward area has a larger airflow contact area so as to collect impurities such as dust.

For example, referring to fig. 3, the circulating airflow circulates in a clockwise direction, and the windward area is disposed at the rear end position of the top wall 51 extending in the clockwise direction.

For example, fig. 4 and 5 illustrate the top wall 51 as an arc-shaped wall, for example, the arc direction of the arc-shaped wall is along the circulation direction of the airflow, so that for the first end and the second end of the arc-shaped wall along the circulation direction of the airflow, the first end is located obliquely above the second end, and the windward area is closer to the first end of the arc-shaped wall, that is, the windward area is located at a position of the arc-shaped wall close to the first end, rather than at a position of the arc-shaped wall close to the second end, which is beneficial to increasing the contact area between the windward area and the airflow.

In some examples, the first dust collecting bin 5 extends along the length direction of the impeller 7, for example, the top bin wall 51 thereof is arranged along the length direction of the impeller 7, and the length of the top bin wall 51 may be consistent with the length of the impeller 7, or the length of the top bin wall 51 may be smaller than the length of the impeller 7, for example, only arranged below part of the bottom wall of the impeller 7, so as to adapt to a more compact space inside the accommodating chamber 11. Accordingly, the number of the first dust falling holes 55 may be designed to be plural, and the plural first dust falling holes 55 extend along the length direction of the impeller 7.

For example, fig. 5 illustrates that a plurality of first dust falling holes 55 are arranged at intervals in the windward area of the top bulkhead 51, and the plurality of first dust falling holes 55 are uniformly distributed at intervals along the length direction of the impeller 7.

In some examples, the first dust falling holes 55 have a structure including, but not limited to, a circle, an ellipse, a rectangle, a hexagon, etc., for example, the first dust falling holes 55 have a rectangular shape, and the length direction of the rectangular shape of the first dust falling holes 55 is along the circulation direction of the airflow to pick up more dust.

In combination with the above structure of the first dust collecting chamber 5, an eccentric vortex is present between the top chamber wall 51 of the first dust collecting chamber 5 and the bottom of the impeller 7, so that the high-speed airflow continuously passes through the local clearance chamber, the high-speed airflow is reduced in pressure and speed at the position of the local clearance chamber, and the first dust falling hole 55 is arranged in the windward area of the top chamber wall 51, so that the reduced-pressure and speed-reduced airflow generates local leakage flow at the first dust falling hole 55, the density of dust in the airflow is increased, and the dust enters the dust collecting chamber from the first dust falling hole 55 under the action of gravity.

The spacing between the top bin wall 51 of the first dust bin 5 and the bottom of the impeller 7 may be adapted according to the specific specification and type of fan, and in some examples, the spacing may be 5mm to 10mm, including but not limited to 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., for example.

Further, as shown in fig. 5, an air flow buffer region 56 (the region enclosed by the oval frame in fig. 5) is provided in the inner cavity of the first dust bin 5, and the air flow buffer region 56 allows the air flow entering through the first dust falling hole 55 to move in the inertial direction by a set distance.

For example, the air flow buffer area 56 is formed at the connection between the top bin wall 51 and the first side bin wall 52, and the shape of the area of the connection is matched with the shape of the movement track of the air flow, so that after the air flow carrying a large amount of impurities enters the inner cavity of the first dust collection bin 5 through the first dust falling hole 55, the air flow continues to move in the air flow buffer area 56 along the inertia direction until the wall surface touching the air flow buffer area 56 loses speed, thereby promoting the dust to fall in the first dust collection bin 5 and fall onto the bottom bin wall 53 of the first dust collection bin 5, and realizing dust collection.

By arranging the airflow buffer region 56 along the airflow direction, dust entering the first dust collecting bin 5 can be prevented from being blown out for a second time, and the probability that airflow in the first dust collecting bin 5 flows back to blow out the first dust falling holes 55 is effectively reduced. The bottom bin wall 53 is fixed inside the housing chamber 11 of the casing 1 to receive the deposited dust.

The bottom bin wall 53 may be designed to be relatively small, for example, only between the first side bin wall 52 and the second side bin wall 54, or the bottom bin wall 53 may also be designed to be relatively large, so that the bottom bin wall 53 can be used for supporting the second dust collecting bin 8 (see fig. 4, which illustrates the design of the bottom bin wall 53 as a relatively large supporting plate shape) as will be described later.

The structure of the casing 1 and the arrangement of the impellers 7 therein are determined according to the type of the fan, the fan provided by the embodiment of the present invention is, for example, a cross-flow fan, fig. 2 illustrates the structure of the casing 1, and referring to fig. 2, the casing 1 is a rectangular tubular structure.

For the casing 1, the air inlet 12 and the air outlet 13 are located at different positions, and the fan provided by the embodiment of the present invention is a cross-flow fan, for example, fig. 2 illustrates that the air inlet 12 is disposed at one side of the casing 1, and the air inlet 12 is arranged in a fully open manner; fig. 2 also illustrates that the air outlet 13 is arranged at the bottom of the housing 1, and the air outlet 13 may be arranged in a semi-open manner, which is beneficial to make the outlet air more concentrated.

In some examples, the housing 1 includes: roof, first curb plate, bottom plate of end to end connection in order to and be located first end plate and the second end plate between roof and the bottom plate, above-mentioned each board cooperation constitutes the holding chamber 11 of casing 1, and, the bottom plate has the fretwork district in order to regard as air outlet 13. For example, fig. 2 illustrates that the accommodating chamber 11 of the housing 1 is a rectangular chamber.

Use the embodiment of the utility model provides a fan is through-flow fan for example, and impeller 7 can be multileaf formula, long cylinder shape, has preceding multiwing shape fan blade.

When the impeller 7 rotates, the inlet air flow enters the blade cascade from the open position of the impeller 7, passes through the inside of the impeller 7 and is discharged into the volute from the blade cascade on the other surface to form working air flow, so that circular air flow with arc-shaped streamline is generated at the output end of the impeller 7.

The impeller 7 is coaxially communicated with the driving motor 6, the driving motor 6 is also called a driving motor, and the impeller 7 is driven by the driving motor 6 to rotate.

The inlet housing 2 and the outlet housing 3 each have an aperture structure allowing airflow to flow, for example, the inlet housing 2 may be in the form of a grid plate having a plurality of grid apertures uniformly distributed thereon, or an aperture plate having apertures of a shape such as circular, oval, rectangular, rhombic, hexagonal, etc. For example, the intake housing 2 may be prepared using a grid plate of a specification commonly found in the art.

The hole structure on the air outlet housing 3 can be a full hollow form or a grid hole form, wherein the hole structure in the full hollow form makes the size of the hole large enough, which is beneficial to obtaining larger air outlet quantity and the speed of the air outlet can not be blocked by the air outlet housing 3 to reduce the speed.

For the dust-isolating net 4, it can adopt any form of dust-isolating structure with dense meshes commonly used in the art, in some examples, the size of the meshes on the dust-isolating net 4 can be 800 meshes to 200 meshes, further 600 meshes to 300 meshes, so as to improve the dust-isolating rate.

In some examples, the wall thickness of the dust-separation net 4 is 0.5mm to 1.2mm, such as 0.8mm, 0.9mm, 1mm, 1.1mm, etc., to reduce the occupation of the inner space of the accommodating chamber 11 as much as possible.

The dust barrier 4 can be fixed to the receiving cavity 11 of the housing 1 in various ways, for example, by gluing, welding, riveting with fasteners, etc.

The air inlet housing 2 and the dust separation net 4 are distributed at a certain distance, the distance between the air inlet housing 2 and the dust separation net 4 and the air inlet speed are in a negative correlation relationship, and fig. 8 illustrates the negative correlation relationship between the distance delta i (in mm) between the air inlet housing 2 and the dust separation net 4 and the air inlet speed vi (in m/s), wherein the range of the distance delta i indicates 2 mm-4.5 mm, and the range of the air inlet speed vi indicates 0-20m/s.

In addition, in the direction from the bottom to the top, the distribution of the distance δ i between the air intake housing 2 and the dust separation net 4 is illustrated in fig. 7, where δ 1 represents the distance between the bottom of the air intake housing 2 and the dust separation net 4, and δ n represents the distance between the top of the dust separation net 4 and the air intake housing 2.

The negative correlation between the distance between the air inlet housing 2 and the dust separation net 4 and the air inlet speed makes the low-speed dust more easily pass through the air inlet housing 2 without staying on the outer wall of the fan, and the high-speed dust enters the small spacing space between the air inlet housing 2 and the dust separation net 4 to reduce the speed, so that the dust cannot collide to the dust separation net 4 at high speed.

In addition, due to the structure of the air inlet housing 2, the air flow velocity difference is generated inside the air inlet housing 2, so that local vortex is generated, dust loses partial normal velocity after passing through the air inlet housing 2 along with the air flow to be buffered, and the dust flows to the dust separation net 4 after the velocity is reduced.

It can be seen that, by arranging the air inlet housing 2 and the dust separation net 4 which are distributed at intervals, dust can not directly collide with the dust separation net 4 in an accelerating manner, and the probability that impurities such as dust penetrate through the dust separation net 4 is obviously reduced. For the dust retained in the gap between the air inlet housing 2 and the dust separation net 4, one part of the dust falls under the action of gravity, the other part of the dust is attached to the outer side of the dust separation net 4 under the action of the suction force of the impeller 7 and the friction force of the dust separation net 4, after the impeller 7 stops running, the dust attached to the dust separation net 4 rolls downwards under the action of gravity with acceleration, so that the dust is prevented from being retained on the air inlet housing 2, and finally, an excellent dust separation effect is achieved.

In some examples, as shown in fig. 3 and 4, the fan provided by the embodiment of the present invention further includes: a second dust collecting bin 8, wherein the second dust collecting bin 8 is provided with a second dust falling hole 81; the bottom of the air inlet housing 2 and the dust separation net 4 are positioned at the second dust falling hole 81.

The cleanness of the air flow entering the impeller 7 is realized by arranging the air inlet housing 2 and the dust separation net 4 which are arranged at intervals on the air inlet side of the fan and matching with the second dust collection bin 8. Specifically, the dust passes through the second dust collecting bin 8 and is used for collecting dust attached to the air inlet housing 2 and the dust separation net 4 and dust in a gap between the air inlet housing 2 and the dust separation net 4 in the falling process, so that the dust is prevented from falling into the outside and being circulated into the fan again.

As shown in fig. 6, the bottom of the air inlet housing 2 has a dust falling plate 21, wherein the dust falling plate 21 is connected to the inner side of the bottom of the air inlet housing 2, and the second dust falling hole 81 includes: a first gap segment 811, a second gap segment 812, and a third gap segment 813; a first gap section 811 is formed between the air intake housing 2 and the corresponding side of the second dust collecting bin 8; second gap sections 812 are formed between the dust-separation net 4 and the respective sides of the second dust-collecting container 8; a third gap section 813 is formed between the dust fall plate 21 and the dust screen 4.

The dust attached to the outside of the air intake housing 2 is collected by the first gap section 811, the dust attached to the inside of the dust separation net 4 is collected by the second gap section 812, and the dust located between the air intake housing 2 and the dust separation net 4 is collected by the third gap section 813, so that the dust separated from the air intake side of the fan can be sufficiently and completely collected by the structure in which the second dust falling hole 81 is provided.

Further, in order to satisfy the sufficient collection of the dust to the fan air inlet side, and avoid the too big compactness that influences the fan of volume in second dust collecting bin 8 to arrange, the embodiment of the utility model provides an, the width of second dust falling hole 81 satisfies following condition: a is more than or equal to 1.05 x (H1 + H2); wherein, a is the width of the second dust falling hole 81; h1 is the distance between the dust-proof net 4 and the bottom of the air inlet housing 2, namely the distance between the bottom of the dust-proof net 4 and the bottom of the air inlet housing 2; h2 is the sum of the wall thickness of the dust separation net 4 and the wall thickness of the air inlet housing 2.

In some examples, the second dust bin 8 comprises, connected in series: the dust collecting device comprises a top bin plate, a first side bin plate, a bottom bin plate and a second side bin plate, wherein the top baffle plate and the top of the second side bin plate are matched to form the second dust falling hole 81, and the bottom bin plate is used for receiving falling dust.

Further, the first side deck and the second side deck may be arranged in a vertical direction, and the top deck may be arranged in a horizontal direction.

As shown in fig. 6, the bottom wall of the second dust collecting container 8 is obliquely arranged so that one end of the bottom wall of the second dust collecting container 8 is positioned below the other end. The bottom wall of the second dust collecting bin 8 referred to herein is the bottom bin plate described above.

In some examples, the bottom wall is inclined in a direction such that an end of the bottom wall of the second dust bin 8 adjacent the fan assembly is below and an end of the bottom wall remote from the fan assembly is above.

By making the bottom wall of the second dust collecting compartment 8 obliquely arranged, the dust received by the bottom wall of the second dust collecting compartment 8 is promoted to smoothly fall into a deeper and more inner position of the second dust collecting compartment 8, so that the dust will be more distant from the air inlet 12 of the housing 1, thereby effectively preventing the collected dust from being brought out by the return air flow to generate secondary pollution.

As mentioned above, the air intake housing 2 and the dust screen 4 are spaced from each other, and in some examples, in conjunction with FIG. 7, the length L of the air intake opening 12 _in And the length L of the outlet 13 _out The following conditions are satisfied: 2.5L _out ＜L _in ＜2.8L _out (ii) a And an included angle α between the central axis of the air inlet 12 and the central axis of the air outlet 13 satisfies the following condition: alpha is more than 25 degrees and less than 90 degrees.

It can be understood that, as can be seen from fig. 7, the air inlet 12 of the housing 1 is not completely vertical but is arranged obliquely at an angle, and the air outlet 13 of the housing 1 is not completely horizontal but arranged obliquely at an angle.

By setting the parameters, the air inlet flow entering from the air inlet 12 can be fully utilized, the local air diffusion backflow is effectively avoided, the situation that the local air inlet is blocked and the due performance cannot be exerted is effectively avoided, and the purpose of fully and efficiently utilizing the air inlet is achieved.

In summary, the fan provided by the embodiment of the present invention achieves the purpose of cleaning the circulating airflow by effectively isolating, dropping, absorbing and collecting dust.

In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless explicitly defined otherwise.

The above description is only for the convenience of understanding the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A fan, characterized in that the fan comprises: the air conditioner comprises a shell (1), an air inlet housing (2), an air outlet housing (3), a dust separation net (4), a first dust collection bin (5) and a fan assembly;

the shell (1) is provided with an accommodating cavity (11), an air inlet (12) and an air outlet (13), and the fan assembly comprises a driving motor (6) and an impeller (7) which are coaxially connected;

the fan assembly is positioned in the accommodating cavity (11), the air inlet housing (2) is connected to the air inlet (12), the air outlet housing (3) is connected to the air outlet (13), and the dust separation net (4) is positioned between the air inlet housing (2) and the side part of the impeller (7);

the first dust collection bin (5) is positioned below the impeller (7), and the first dust collection bin (5) is used for collecting impurities doped in the airflow output by the impeller (7).

2. The fan according to claim 1, wherein the first dust bin (5) comprises: a top bin wall (51), a first side bin wall (52), a bottom bin wall (53) and a second side bin wall (54) which are connected end to end in sequence;

the top bin wall (51) is provided with a first dust falling hole (55), and the first dust falling hole (55) is communicated with the inner cavity of the first dust collection bin (5).

3. The fan according to claim 2, wherein a top surface of the top bulkhead (51) facing the impeller (7) has a windward area, the first dust fall hole (55) being provided at the windward area.

4. The fan of claim 3 wherein the top plenum wall (51) is an arcuate wall having a first end located obliquely above a second end thereof;

the windward region is closer to the first end of the curved wall.

5. The fan according to claim 2, wherein an air flow buffer area (56) is provided in the inner cavity of the first dust collecting bin (5), the air flow buffer area (56) allowing the air flow entering through the first dust falling hole (55) to move in the direction of inertia by a set distance.

6. The fan as claimed in any one of claims 1 to 5, further comprising: a second dust collecting bin (8), wherein the second dust collecting bin (8) is provided with a second dust falling hole (81);

the bottoms of the air inlet housing (2) and the dust separation net (4) are positioned in the second dust falling hole (81).

7. The fan as claimed in claim 6, wherein the bottom of the wind inlet housing (2) has a dust falling plate (21), and the second dust falling hole (81) comprises: a first gap segment (811), a second gap segment (812), and a third gap segment (813);

the first gap section (811) is formed between the respective sides of the air intake shroud (2) and the second dust bin (8);

the second gap section (812) is formed between the dust separation net (4) and the corresponding side of the second dust collection bin (8);

the third gap section (813) is formed between the dust fall plate (21) and the dust screen (4).

8. The fan as claimed in claim 6, wherein the width of the second dust drop hole (81) satisfies the following condition: a is more than or equal to 1.05 x (H1 + H2);

wherein A is the width of the second dust falling hole (81);

h1 is the distance between the dust-proof net (4) and the bottom of the air inlet housing (2);

h2 is the sum of the wall thicknesses of the dust separation net (4) and the air inlet housing (2).

9. The fan as claimed in claim 6, wherein the bottom wall of the second dust collecting bin (8) is obliquely arranged such that one end of the bottom wall of the second dust collecting bin (8) is located below the other end.

10. The fan according to any one of claims 1 to 5, wherein the length L of the air inlet (12) _in And the length L of the air outlet (13) _out The following conditions are satisfied: 2.5L _out ＜L _in ＜2.8L _out ；

And the number of the first and second groups,

an included angle alpha between the central axis of the air inlet (12) and the central axis of the air outlet (13) meets the following conditions: alpha is more than 25 degrees and less than 90 degrees.

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