CN111255749A - Wind-guiding circle and fan subassembly - Google Patents

Abstract

The application discloses wind-guiding circle and fan subassembly. The air guide ring is configured to be sleeved on the fan and guide airflow to flow, and the inner wall of the air guide ring is surrounded to form an accommodating space configured to wrap the fan. The fan assembly comprises a fan and an air guide ring, and the fan is arranged in the accommodating space. In the arrangement, the air guide ring can be wrapped on the periphery of the fan, so that the airflow flowing to the fan from the upstream of the heat exchange system can move in the direction parallel to the axis of the air guide ring, namely the airflow can move in the direction parallel to the axis of the fan until the airflow reaches the fan blade of the fan, so that the fan blade can better drive the air to flow, more air flows out of the air guide ring and flows to the downstream of the heat exchange system, and the air output of the fan assembly is improved; when the air output is a constant value, the rotating speed of the fan can be properly reduced, so that the noise is reduced.

Description

Wind-guiding circle and fan subassembly

Technical Field

The application relates to the field of heat exchange, in particular to an air guide ring and a fan assembly.

Background

The heat exchange system comprises a heat exchanger, a fan assembly is required to be arranged on the heat exchanger, and the fan assembly can accelerate air flow around the heat exchanger so as to improve the heat exchange efficiency of the heat exchanger. One side of the fan assembly close to the heat exchanger is used as the upstream of the fan assembly, and the fan assembly can drive air to flow from the upstream to the downstream. The fan subassembly includes fan and wind-guiding circle, and the week side of fan is located to the wind-guiding circle cover. However, the air output of the fan assembly in the prior art is small, and in order to ensure sufficient air output, the rotating speed of the fan needs to be increased, namely, the rotating speed of the motor driving the fan to rotate is increased, so that large noise is generated.

Disclosure of Invention

The application provides a wind-guiding circle and fan subassembly, it can realize promoting air output, noise abatement as far as possible.

According to a first aspect of the application, an air guiding ring is provided, the air guiding ring is configured to be sleeved on a fan and guide airflow to flow, the air guiding ring is annular, and an accommodating space configured to wrap the fan is enclosed by the inner wall of the air guiding ring.

Further, the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end;

the inner wall of the air guide ring close to the first end is expanded outwards from the second end to the first end, and at least part of the air guide ring expanded outwards forms a first expansion part.

Further, an included angle between the first expansion portion and the axis of the air guide ring is greater than or equal to 3 degrees and smaller than or equal to 40 degrees.

Further, the air guide ring further comprises a flow gathering part, and the flow gathering part is far away from the first end relative to the first expansion part;

the size of the inner wall of the flow gathering part is smaller than or equal to that of the inner wall of the first expansion part, and the sizes of all positions of the flow gathering part are the same from the second end to the first end.

Further, the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end;

and the inner wall of the air guide ring close to the second end is expanded outwards from the first end to the second end.

Furthermore, the air guide ring comprises a first turning position, and the inner wall of the air guide ring at the side of the first turning position, which is far away from the first end, extends outwards from the first end to the second end;

the inner wall of the air guide ring at the first turning position, which is far away from the first end, comprises a second expansion part and a third expansion part which are axially connected, and the third expansion part is far away from the first end compared with the second expansion part;

the slope of the second extension is greater than the slope of the third extension.

Further, the fan is arranged in the accommodating space, and the axis of the fan is overlapped with the axis of the air guide ring;

the fan comprises fan blades, the distance between the first turning position and the center of the fan blades along the direction from the first end to the second end is a first numerical value, and the ratio of the first numerical value to the radius of the fan is less than or equal to 0.08.

Further, the fan is arranged in the accommodating space;

the second expansion part is smoothly connected with at least part of the air guide ring above the second expansion part through a first arc, and the ratio of the radius of the first arc to the radius of the fan is more than or equal to 0.04 and less than or equal to 0.15; and/or the second expansion part and the third expansion part are smoothly connected through a second circular arc, and the ratio of the radius of the second circular arc to the radius of the fan is more than or equal to 0.04 and less than or equal to 0.15.

Furthermore, reinforcing ribs are arranged on the outer wall of the air guide ring and distributed along the axial direction and/or the circumferential direction of the air guide ring; and/or the presence of a gas in the gas,

the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end; the second end of the air guide ring is inwards recessed along the axial direction to form a clamping groove; and/or the presence of a gas in the gas,

the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end; the first end of the air guide ring extends outwards along the circumferential direction to form a rim, and a positioning hole is formed in the rim.

According to a second aspect of the application, a fan assembly is provided, the fan assembly comprises a fan and the air guide ring, and the fan is arranged in the accommodating space;

the air guide ring comprises a first end and a second end along the height direction, and the fan rotates to drive airflow to flow from the second end to the first end; the fan comprises a top end and a bottom end along the axial direction, and the bottom end is closer to the second end than the top end;

the second end of the wind-guiding ring is far away from the first end compared with the bottom end of the fan, and the first end of the wind-guiding ring is far away from the second end compared with the top end of the fan.

Further, the minimum distance from the fan to the inner wall of the air guide ring is a second value, and the ratio of the second value to the radius of the fan is greater than or equal to 0.01 and less than or equal to 0.04.

Furthermore, the number of the fans and the number of the air guide rings are multiple, the fans and the number of the air guide rings are the same, and one fan is arranged in one air guide ring; the plurality of air guide rings are arranged along a first direction;

the first end of the air guide ring is oval in shape on the cross section, and the short side of the oval is parallel to the first direction.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in the arrangement, the air guide ring can be wrapped on the periphery of the fan, so that the airflow flowing to the fan from the upstream of the heat exchange system can move in the direction parallel to the axis of the air guide ring, namely the airflow can move in the direction parallel to the axis of the fan until the airflow reaches the fan blade of the fan, so that the fan blade can better drive the air to flow, more air flows out of the air guide ring and flows to the downstream of the heat exchange system, and the air output of the fan assembly is improved; when the air output is a constant value, the rotating speed of the fan can be properly reduced, so that the noise is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Fig. 1 is a schematic perspective view of a fan assembly according to an embodiment of the present application.

FIG. 2 is a schematic plan view of a fan assembly according to an embodiment of the present application.

FIG. 3 is another schematic plan view of a fan assembly according to an embodiment of the present application.

FIG. 4 is a schematic view of another plan view of a fan assembly according to an embodiment of the present application.

FIG. 5 is a schematic view of another plane structure of a fan assembly according to an embodiment of the present application.

Fig. 6 is a schematic sectional view in the direction of a-a in fig. 4.

Fig. 7 is a schematic sectional view in the direction B-B in fig. 5.

FIG. 8 is a schematic cross-sectional view of a fan assembly.

FIG. 9 is a schematic view of another planar structure of a fan assembly according to an embodiment of the present application.

Description of the reference numerals

Fan assembly 10

Upstream 20

Downstream 30

Wind-guiding ring 100

First expansion part 101

Second expansion part 102

Third expansion 103

Flow collecting part 104

First turning position 105

Second arc 107

Inner wall 110

Accommodation space 120

First end 130

Second end 140

Reinforcing bar 150

Card slot 160

Edge 170

Positioning hole 171

Fan 200

Fan blade 210

Shaft part 220

Tip 230

Bottom end 240

Motor 300

Rotating shaft 400

First value d1

Second value d2

Height direction H

First direction X

Second direction Y

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The following exemplary described embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

As shown in fig. 1, the present application discloses a fan assembly 10 for use in a heat exchange system.

As shown in fig. 1 to 5, and as necessary with reference to fig. 6 and 7, the fan assembly 10 includes a wind guide ring 100, a fan 200, and a motor 300. Wherein, the axis of fan 200 coincides with the axis of wind-guiding circle 100. The fan 200 includes a plurality of fan blades 210 and a shaft portion 220, and the number of the fan blades 210 is a plurality, and the fan blades are distributed on the peripheral side of the shaft portion 220. The motor 300 drives the fan blade 210 to rotate by driving the shaft portion 220 to rotate through the rotating shaft 400, so as to drive the air to flow from the upstream 20 to the downstream 30.

It should be noted that, the fan assembly 10 is configured to be installed on the peripheral side of the heat exchanger in the heat exchange system, and the fan assembly 10 can accelerate the air flow around the heat exchanger to improve the heat exchange efficiency of the heat exchanger. The side of the fan assembly 10 adjacent the heat exchanger serves as the upstream 20 and the side remote from the heat exchanger serves as the downstream 30. When the fan 200 in the fan assembly 10 rotates, the air is driven to flow from the upstream 20 to the downstream 30, i.e. the air around the heat exchanger is driven to flow, so as to improve the heat exchange efficiency of the heat exchanger.

As shown in fig. 6 and 7, the air guiding ring 100 is sleeved on the periphery of the fan 200 to guide the airflow to flow. Wind-guiding circle 100 is annular, and inner wall 110 of wind-guiding circle 100 encloses into the accommodation space 120 that is configured to wrap fan 200. In other words, the fan 200 includes a top end 230 and a bottom end 240 along the axial direction, and when the fan 200 is disposed in the accommodating space 120 of the wind guide ring 100, both the top end 230 and the bottom end 240 of the fan 200 can be wrapped by the wind guide ring 100.

As shown in fig. 8, in the prior art, the bottom of the fan 1 extends out of the wind guiding ring 2. Usually, in the process of designing and manufacturing the fan 1, the fan blade 3 is turned over at a certain angle relative to the horizontal direction, so that the gas flowing to the fan blade 3 along the axial direction of the fan 1 can be better driven by the fan blade 3, and the gas flows to the upstream from the downstream. In this design, the fan 1 rotates to generate negative pressure, thereby sucking air around the fan 1. Then, because the bottom of the fan 1 near the upstream 20 extends out of the wind guide ring 2, the air on the peripheral side of the fan 1 exposed out of the wind guide ring 2 will approach the fan blades 3 of the fan 1 in the direction perpendicular to the axis of the fan 1, as shown by the dotted arrow in the figure. The fan blade 3 cannot effectively drive the part of air to move along the axial direction of the fan 1 and make the part of air move to the downstream 30, so that the air output of the fan component 4 is small. Meanwhile, in order to satisfy the air output required by the heat exchange system and ensure the heat exchange efficiency of the heat exchanger, the rotating speed of the fan 1 needs to be increased, so that the rotating speed of the motor 5 needs to be increased, and the problems of high noise, high energy consumption and the like are caused.

As shown in fig. 6 and 7, in the present design, the fan 200 is disposed in the accommodating space 120, that is, the wind-guiding ring 100 can completely wrap the periphery of the fan 200. That is, the wind-guiding ring 100 includes a first end 130 and a second end 140 along the height direction H, the first end 130 faces the downstream 30, the second end 140 faces the upstream 20, and the airflow can flow from the second end 140 to the first end 130. When the fan 200 is disposed in the accommodating space 120 of the wind guide ring 100, the bottom end 240 is closer to the second end 140 than the top end 230. The second end 140 of the wind-guiding ring 100 is far away from the first end 130 than the bottom end 240 of the fan 200, and the first end 130 of the wind-guiding ring 100 is far away from the second end 140 than the top end 230 of the fan 200. When the fan 200 rotates, the air pressure in the accommodating space 120 decreases, and the air in the downstream 30 enters the air guiding ring 100 from the second end 140, and flows out of the air guiding ring 100 from the first end 130 to the downstream 30 under the driving of the fan blade 210 of the fan 200. The flow direction of the gas flowing into the wind-guiding ring 100 from the upstream 20 is shown by the dotted arrow in the figure. The air entering the wind-guiding ring 100 from the second end 140 moves towards the fan blade 210 of the fan 200 along the direction parallel to the axis of the wind-guiding ring 100 under the guidance of the inner wall 110 of the wind-guiding ring 100. Since the axis of the wind-guiding ring 100 coincides with the axis of the fan 200, the flow direction of the gas flowing from the upstream 20 to the fan 200 is parallel to the axis of the fan 200. Through the arrangement, the fan blade 210 can better drive the air to rotate and move towards the direction close to the downstream 30. The flow of the gas in the fan assembly 10 is large, that is, the air output of the fan assembly 10 is increased, and the heat exchange efficiency of the heat exchange system is improved. Meanwhile, when the air output is a constant value, the rotation speed of the fan 200, in other words, the rotation speed of the motor 300, can be appropriately reduced, thereby reducing noise and energy consumption.

The following table data can be obtained by experiment.

When the rotating speeds of the motor and the fan are the same, the data of the air output of the fan assembly with the existing design and the air output of the fan assembly with the existing design are shown in table 1. When the air output of the fan assembly is the same, the noise data of the fan assembly of the prior design and the fan assembly of the design are shown in table 2.

TABLE 1

As can be seen from the data recorded in Table 1, when the rotating speeds of the motor and the fan are the same, the air output of the fan assembly of the design is greatly increased compared with the existing design, and the increase range of the air output is approximately about 5%.

TABLE 2

As can be seen from the data recorded in table 2, when the air output of the fan assembly is the same, the noise of the fan assembly of the present design is greatly reduced compared to the conventional design, and the noise reduction range is approximately 1 decibel (dBA) to 1.2 decibel (dBA).

Further, the inner wall 110 of the wind-guiding ring 100 near the first end 130 is expanded outwards from the second end 140 to the first end 130, and at least a part of the wind-guiding ring 100 expanded outwards forms a first expanded portion 101. During use, gas flows from the second end 140 to the first end 130 under the driving of the fan 200. As the gas moves to a position near the first end 130, its flow rate is faster and the dynamic pressure is greater. If the flow rate of the gas flowing out of the wind guide ring 100 is too high, the gas directly moves in the direction away from the wind guide ring 100 and directly enters the atmosphere, and effective heat exchange with the device located at the downstream 30 cannot be performed, so that the heat exchange efficiency of the heat exchange system is low.

Through setting up first extension 101 for the size grow of the one side that is close to low reaches 30 of wind-guiding circle 100, thereby make the gas that flows through flow through behind first extension 101 velocity of flow reduce, be about to this partial gaseous dynamic pressure convert static pressure into, thereby make the gas that flows to low reaches 30 can better with be located low reaches 30 device contact, realize the heat exchange, with the heat exchange efficiency who promotes heat transfer system.

Through a lot of experiments, as shown in fig. 6, when the included angle α between the first expanding portion 101 and the axis of the wind guiding ring 100 is greater than or equal to 3 ° and less than or equal to 40 °, the dynamic pressure of the gas can be better converted into the static pressure, and at the same time, a sufficient flow rate of the gas can be ensured to flow to the downstream 30 for heat exchange.

Further, the air guide ring 100 further includes a flow collecting portion 104, and the flow collecting portion 104 is away from the first end 130 relative to the first expanding portion 101. The size of the inner wall 110 of the flow collecting part 104 is equal to or smaller than the size of the inner wall 110 of the first expanded part 101, and the sizes of the positions of the flow collecting part 104 are the same from the second end 140 to the first end 130. In an actual use process, when a gap between the fan blade 210 of the fan 200 and the inner wall 110 of the wind guide ring 100 is too large, the air in the wind guide ring 100 cannot be well driven by the fan blade 210 of the fan 200, so that the air output of the fan assembly 10 is affected, and therefore, the flow gathering portion 104 with a size smaller than that of the first expansion portion 101 is arranged, and the flow gathering portion 104 can guide and gather the air, so that the air flowing into the wind guide ring 100 from the upstream 20 can better reach the fan blade 210, and can flow to the downstream 30 under the driving of the fan blade 210.

Proved by a large number of experiments, the minimum distance between the fan 200 and the inner wall 110 of the wind guide ring 100 is used as the second numerical value d2, and when the ratio of the second numerical value d2 to the radius R of the fan 200 is greater than or equal to 0.01 and less than or equal to 0.04, the gas in the wind guide ring 100 can better reach the fan blades 210 and flow under the driving of the fan blades 210. In the present embodiment, the distance between the inner wall 110 of the flow collecting portion 104 and the wind guiding ring 100 is the smallest, in other words, the ratio of the distance between the inner wall 110 of the flow collecting portion 104 and the fan 200 to the radius of the fan 200 is greater than or equal to 0.01, and is less than or equal to 0.04, so as to increase the wind output.

Further, the inner wall 110 of the wind-guiding ring 100 near the second end 140 is expanded outwards from the first end 130 to the second end 140. Through the arrangement, the size of the second end 140 of the wind guide ring 100 facing the downstream 30 can be increased, so that more gas can enter the wind guide ring 100 and can move under the driving of the fan 200. Meanwhile, in the course of experiments, the inventors (a) found that when gas flows in a narrow space, a large noise is caused. In other words, when the gap between the inner wall 110 of the wind guide ring 100 and the fan blade 210 of the fan 200 is too small, the air flows in a narrow space, which may cause loud noise. In order to balance the problems of air output and noise, the distance between the part of the air guide ring 100 and the fan 200 can be increased by expanding the size of the inner wall 110 of the part of the air guide ring 100. When the distance between the wind guide ring 100 and the fan 200 is increased, noise can be effectively reduced.

Further, the wind-guiding ring 100 includes a first turning position 105, and the first turning position 105 is located on a side of the flow-gathering portion 104 close to the second end 140. In a direction from the first end 130 to the second end 140, the inner wall 110 of the wind-guiding ring 100 at the first turning position 105 on a side away from the first end 130 is expanded outward. The wind-guiding ring 100 at the side of the first turning position 105 far from the first end 130 comprises a second expansion portion 102 and a third expansion portion 103 which are connected in the axial direction, and the third expansion portion 103 is far from the first end 130 compared with the second expansion portion 102. The slope of the second extension 102 is greater than the slope of the third extension 103. Through the arrangement, the size of the inner wall 110 of the second expansion part 102 is rapidly increased, namely, the distance between the inner wall 110 and the fan blade 210 is rapidly increased, and the noise is reduced. At the same time, the slope of the third extension 103 is reduced in order to avoid the fan assembly 10 taking up too much space.

In the present embodiment, the first and second expanding portions 101 and 102 are connected to both ends of the flow collecting portion 104, respectively. Alternatively, in other embodiments, the wind-guiding ring 100 may further include a connecting portion, two ends of the connecting portion are respectively connected to the first expanding portion 101 and the second expanding portion 102, and the flow-concentrating portion 104 serves as at least part of the connecting portion.

As shown in the figure, the second expanded portion 102 and at least a part of the wind-guiding ring 100 located above the second expanded portion are smoothly connected through a first arc 106, that is, both ends of the first arc 106 connect the second expanded portion 102 and the flow-collecting portion 104, so as to realize smooth connection between the second expanded portion 102 and the flow-collecting portion 104. The ratio of the radius R1 of the first arc 106 to the radius R of the fan 200 is equal to or greater than 0.04, and equal to or less than 0.15. The second expanded portion 102 and the third expanded portion 103 are smoothly connected by a second arc 107, and the ratio of the radius R2 of the second arc 107 to the radius R of the fan 200 is 0.04 or more and 0.15 or less. Experiments show that when the ratio of the radii of the first arc R1 and the second arc R2 to the radius R of the fan 200 falls within the above range, the second expansion part 102 can be expanded quickly, the strength of the wind guide ring 100 can be ensured, the phenomenon of stress concentration on the wind guide ring 100 is avoided, and meanwhile, the area occupied by the fan assembly 10 is maintained within a reasonable range.

Further, in the present embodiment, the first turning point 105 is an end of the flow collecting part 104 connected to the second expanding part 102. The distance between the first turning position 105 and the center of the fan 200 along the direction from the first end 130 to the second end 140 is also the first value d1, in other words, the first value d1 is the distance between the first turning position 105 and the center of the fan blade 210 along the height direction H. The ratio of the first value d1 to the radius R of the fan 200 is equal to or less than 0.08. Through the arrangement, the second expansion part 102 cannot influence the guiding effect of the flow gathering part 104 on the airflow, so that more air can be driven by the fan blade 210 and flows to the downstream 30, and the air output of the fan assembly 10 is ensured. Meanwhile, noise caused by rotation of the fan 200 can be minimized.

It should be noted that, the central position of the fan blade 210 at this time is a position where a midpoint 212 of a connecting line 211 from the top end of the fan blade 210 to the bottom end of the fan blade 220 is located.

As shown in fig. 1, 4 and 5, in the present embodiment, the outer wall of the wind-guiding ring 100 is provided with the reinforcing ribs 150, and the reinforcing ribs 150 are distributed along the axial direction and the circumferential direction of the wind-guiding ring 100 to improve the strength of the wind-guiding ring 100. Of course, in other embodiments, the reinforcing ribs 150 may be distributed only along the axial direction or the circumferential direction of the wind guide ring 100.

Further, as shown in fig. 1, the second end 140 of the wind-guiding ring 100 is recessed inward along the axial direction to form a locking groove 160. The fan assembly 10 can be clamped above other devices through the clamping groove 160, so that the fan assembly is connected with other devices in the heat exchange system in a matching manner.

Further, the first end 130 of the wind guiding ring 100 extends outward along the circumferential direction to form a rim 170, a positioning hole 171 is formed on the rim 170, and a fastening member such as a bolt or a screw can be inserted into the positioning hole 171. The fan assembly 10 can be fastened and connected with other devices through the positioning holes 171, fasteners and the like, so that the fan assembly can be fixed with other devices and equipment in the heat exchange system.

Further, as shown in fig. 9, in the present embodiment, the number of the fans 200 and the number of the wind-guiding rings 100 are multiple, the number of the fans 200 is the same as that of the wind-guiding rings 100, and one fan 200 is disposed in one wind-guiding ring 100. The plurality of wind-guiding rings 100 are arranged in the first direction X.

The first end 130 of the wind-guiding ring 100 is oval in cross section, the short side 500 of the oval is parallel to the first direction X, the long side 600 of the oval is parallel to the second direction Y, and the first direction X is perpendicular to the second direction Y. In other words, the first expanded portion 101 has an elliptical shape in cross section. When the plurality of wind-guiding rings 100 are arranged along the first direction X, the smaller ends of the adjacent wind-guiding rings 100 are abutted against each other, so as to reduce the area occupied by the fan assembly 10.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims (12)

1. The air guide ring is configured to be sleeved on a fan and guide airflow to flow, and is characterized in that an accommodating space configured to wrap the fan is enclosed by the inner wall of the air guide ring.

2. The wind-guiding collar of claim 1, wherein the wind-guiding collar includes a first end and a second end along a height direction, the airflow being capable of flowing from the second end to the first end;

the inner wall of the air guide ring close to the first end is expanded outwards from the second end to the first end, and at least part of the air guide ring expanded outwards forms a first expansion part.

3. The wind-guiding ring of claim 2, wherein the angle between the first extension portion and the axis of the wind-guiding ring is greater than or equal to 3 ° and less than or equal to 40 °.

4. The wind-guiding ring of claim 2, further comprising a flow-concentrating portion, wherein the flow-concentrating portion is distal from the first end relative to the first expanded portion;

the size of the inner wall of the flow gathering part is smaller than or equal to that of the inner wall of the first expansion part, and the sizes of all positions of the flow gathering part are the same from the second end to the first end.

5. The wind-guiding collar of claim 1, wherein the wind-guiding collar includes a first end and a second end along a height direction, the airflow being capable of flowing from the second end to the first end;

and the inner wall of the air guide ring close to the second end is expanded outwards from the first end to the second end.

6. The wind-guiding ring of claim 5, wherein the wind-guiding ring comprises a first folded position, and an inner wall of the wind-guiding ring at a side of the first folded position far away from the first end is extended outwards in a direction from the first end to the second end;

the inner wall of the air guide ring at the first turning position, which is far away from the first end, comprises a second expansion part and a third expansion part which are axially connected, and the third expansion part is far away from the first end compared with the second expansion part;

the slope of the second extension is greater than the slope of the third extension.

7. The wind-guiding ring of claim 6, wherein the fan is disposed in the accommodating space, and an axis of the fan coincides with an axis of the wind-guiding ring;

the fan comprises fan blades, the distance between the first turning position and the center of the fan blades along the direction from the first end to the second end is a first numerical value, and the ratio of the first numerical value to the radius of the fan is less than or equal to 0.08.

8. The wind guide ring of claim 6, wherein the fan is disposed in the accommodating space;

the second expansion part is smoothly connected with at least part of the air guide ring above the second expansion part through a first arc, and the ratio of the radius of the first arc to the radius of the fan is more than or equal to 0.04 and less than or equal to 0.15; and/or the second expansion part and the third expansion part are smoothly connected through a second circular arc, and the ratio of the radius of the second circular arc to the radius of the fan is more than or equal to 0.04 and less than or equal to 0.15.

9. The wind-guiding ring according to claim 1, wherein reinforcing ribs are arranged on the outer wall of the wind-guiding ring, and the reinforcing ribs are distributed along the axial direction and/or the circumferential direction of the wind-guiding ring; and/or the presence of a gas in the gas,

the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end; the second end of the air guide ring is inwards recessed along the axial direction to form a clamping groove; and/or the presence of a gas in the gas,

the air guide ring comprises a first end and a second end along the height direction, and the air flow can flow from the second end to the first end; the first end of the air guide ring extends outwards along the circumferential direction to form a rim, and a positioning hole is formed in the rim.

10. A fan assembly, characterized in that the fan assembly comprises a fan and the wind guide ring of any one of claims 1 to 9, wherein the fan is arranged in the accommodating space;

the air guide ring comprises a first end and a second end along the height direction, and the fan rotates to drive airflow to flow from the second end to the first end; the fan comprises a top end and a bottom end along the axial direction, and the bottom end is closer to the second end than the top end;

the second end of the wind-guiding ring is far away from the first end compared with the bottom end of the fan, and the first end of the wind-guiding ring is far away from the second end compared with the top end of the fan.

11. The fan assembly of claim 10 wherein the minimum distance from the fan to the inner wall of the deflector ring is a second value, and the ratio of the second value to the radius of the fan is greater than or equal to 0.01 and less than or equal to 0.04.

12. The fan assembly of claim 10, wherein the number of the fans and the number of the wind-guiding rings are both multiple, and the number of the fans and the number of the wind-guiding rings are the same, and one fan is arranged in one wind-guiding ring; the plurality of air guide rings are arranged along a first direction;

the first end of the air guide ring is oval in shape on the cross section, and the short side of the oval is parallel to the first direction.

Images