Air outlet structure and fan

Abstract

The utility model discloses an air outlet structure and a fan and relates to the technical field of air blowing equipment, the air outlet structure comprises an air guide ring and fan blades, an air outlet cavity is formed in the air guide ring, and an air inlet hole and an air outlet hole which are communicated with the air outlet cavity are formed in the two ends of the air guide ring respectively; the fan blades are arranged in the air outlet cavity, and the edges of the fan blades are arranged close to the inner wall of the air outlet cavity. The inner wall of the air inlet hole is provided with a turnup in a surrounding mode, the end, facing the fan blades, of the turnup is arranged in a bent mode, the inner wall of the air outlet hole is provided with a flow blocking step in a surrounding mode, and the flow blocking step is arranged back to the other ends of the fan blades. According to the technical scheme, the air outlet structure is used for blocking backflow of the inlet air flow and the outlet air flow, the air outlet amount of the fan is better guaranteed, and the practicability and reliability of the air outlet structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blowing equipment, in particular to an air outlet structure and a fan. Background Art

[0002] Existing fan equipment can usually accommodate fan blades in the fan's air outlet cavity for rotation, so that during the rotation of the fan blades, the air flow is driven from the air inlet into the air outlet cavity, and then the air flow is disturbed to be blown out from the air outlet at a certain flow rate and wind force, thereby achieving the fan's blowing effect.

[0003] However, in the existing fans, a certain gap needs to be reserved between the edge of the fan blades and the inner wall of the air outlet cavity to prevent the fan blades from colliding with the inner wall of the air outlet cavity. Part of the airflow in the air outlet cavity is easily disturbed by the fan blades and tends to produce a certain centrifugal effect and flow to between the edge of the fan blades and the inner wall of the air outlet cavity, thereby causing part of the airflow entering the air outlet cavity through the air inlet to easily flow back from the edge of the air inlet under the centrifugal effect, reducing the amount of air entering the air outlet cavity; and part of the airflow flowing out of the air outlet cavity through the air outlet is also easily caused to flow back into the air outlet cavity at the edge of the air outlet under the centrifugal effect, reducing the air output of the fan and affecting the air outlet effect of the fan. Utility Model Content

[0004] The main purpose of the utility model is to propose an air outlet structure and a fan, aiming to use the air outlet structure to hinder the backflow of the incoming air flow and the outgoing air flow, better ensure the air outlet volume of the fan, and improve the practicality and reliability of the air outlet structure.

[0005] To achieve the above-mentioned purpose, the air outlet structure proposed by the utility model includes an air guide ring and a fan blade, wherein an air outlet cavity is formed in the air guide ring, and an air inlet hole and an air outlet hole connected to the air outlet cavity are respectively arranged at two ends of the air guide ring; the fan blade is arranged in the air outlet cavity, and the edge of the fan blade is arranged close to the inner wall of the air outlet cavity. The inner wall of the air inlet hole is surrounded by a flange, and the flange is bent toward one end of the fan blade, and the inner wall of the air outlet hole is surrounded by a flow blocking step, and the flow blocking step is arranged away from the other end of the fan blade.

[0006] In one embodiment, the flange is provided with a first choke groove, the notch of which is arranged toward one end of the fan blade, and the baffle step is provided with a second choke groove, the notch of which is arranged away from the other end of the fan blade.

[0007] In one embodiment, the fan blades include a hub, at least two first blades and at least two second blades, a centrifugal air duct is formed in the hub, the centrifugal air duct runs through the hub, and the two ends of the centrifugal air duct are respectively connected to the air inlet and the air outlet; at least two of the first blades are connected to the outer periphery of the hub at intervals, and the edge of the first blade facing away from the hub is arranged close to the inner wall of the air outlet cavity; at least two of the second blades are arranged in the centrifugal air duct and are connected to the inner wall of the hub at intervals.

[0008] In one embodiment, the width of the hub is configured to gradually increase from the air inlet toward the air outlet. And / or, the projection of the first blade on the outer periphery of the hub is arranged in an arc shape. And / or, the projection of the second blade on the inner wall of the hub is arranged in an arc shape.

[0009] In one embodiment, the air outlet structure further includes a driving device, which is connected to the fan blades and drives the fan blades to rotate.

[0010] In one embodiment, the fan blade further comprises a connecting member, the connecting member is arranged in the centrifugal air duct, the second blade is arranged between the connecting member and the inner wall of the hub, and connects the connecting member and the inner wall of the hub. The driving device is provided with a rotating shaft, one end of which is plugged into the connecting member.

[0011] In one embodiment, the air outlet structure further includes a drainage cover, which is connected to the air guide ring and covers the air outlet hole, and the drainage cover forms a drainage channel connected to the air outlet hole.

[0012] In one embodiment, the drainage cover includes an inner cover ring, an outer cover ring and spoiler ribs, the inner cover ring includes a drainage section and a guide section, the guide section is connected to the drainage section and is arranged in the centrifugal air duct, at least part of the edge of the second blade is arranged close to the outer periphery of the guide section; the outer cover ring is connected to one end of the air guide ring and is covered on the outer periphery of the drainage section, the outer cover ring and the drainage section are enclosed to form the drainage channel; the spoiler ribs are arranged in the drainage channel and connect the outer periphery of the drainage section and the inner wall of the outer cover ring.

[0013] In one embodiment, the air outlet structure further includes an air filter assembly, and the air filter assembly is connected to the air guide ring and covers the air inlet hole.

[0014] The utility model further provides a fan, which comprises a bracket and an air outlet structure. The air outlet structure is the air outlet structure described above, and the air outlet structure is installed on the bracket.

[0015] The technical solution of the utility model provides a flange on the inner wall of the air inlet hole of the air guide ring, and a flow blocking step on the inner wall of the air outlet hole of the air guide ring. The flange can be used to block the air inlet return airflow of the air outlet structure, and the flow blocking step can be used to block the air outlet return airflow of the air outlet structure, thereby effectively reducing the air inlet airflow loss and the air outlet airflow loss of the air outlet structure, and better improving the air inlet air volume and the air outlet air volume of the air outlet structure, so that the fan can achieve a more stable and reliable large air volume air outlet effect, and further improve the practicability and reliability of the air outlet structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A structural schematic diagram of an embodiment of an air outlet structure provided by the utility model;

[0018] Figure 2 for Figure 1 A structural exploded view of an embodiment of an air outlet structure;

[0019] Figure 3 for Figure 1 A cross-sectional view of an embodiment of an air outlet structure;

[0020] Figure 4 for Figure 1 A flow diagram of the internal air flow of the air outlet structure of an embodiment of the invention;

[0021] Figure 5 for Figure 1 A cross-sectional schematic diagram of an embodiment of an air guide ring and a fan blade of an air outlet structure;

[0022] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0023] Figure 7 for Figure 5 A partial enlarged view of point B in the middle.

[0024] Description of Figure Numbers:

[0025] 100, air outlet structure; 10, air guide ring; 11, air outlet cavity; 13, air inlet hole; 131, flange; 1311, first flow blocking groove; 15, air outlet hole; 151, flow blocking step; 1511, second flow blocking groove; 30, fan blade; 31, wheel hub; 311, centrifugal air duct; 33, first blade; 35, second blade; 37, connecting piece; 50, driving device; 70, guide cover; 71, inner cover ring; 711, guide section; 713, guide section; 73, outer cover ring; 75, spoiler rib; 90, air filter assembly;

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] In the existing fans, a certain gap needs to be reserved between the edge of the fan blade and the inner wall of the air outlet cavity to prevent the fan blade from colliding with the inner wall of the air outlet cavity. Part of the airflow in the air outlet cavity is easily disturbed by the fan blade and easily produces a certain centrifugal effect and flows to the edge of the fan blade and the inner wall of the air outlet cavity, which causes part of the airflow entering the air outlet cavity through the air inlet to easily flow back from the edge of the air inlet under the centrifugal effect, reducing the amount of air entering the air outlet cavity; and part of the airflow flowing out of the air outlet cavity through the air outlet is also easy to flow back to the air outlet cavity at the edge of the air outlet under the centrifugal effect, reducing the air volume of the fan and affecting the air outlet effect of the fan. In view of the above problems, the utility model proposes an air outlet structure 100.

[0031] See also Figures 1 to 7 In one embodiment of the utility model, the air outlet structure 100 includes an air guide ring 10 and a fan blade 30. An air outlet cavity 11 is formed in the air guide ring 10. The two ends of the air guide ring 10 are respectively provided with an air inlet hole 13 and an air outlet hole 15 connected to the air outlet cavity 11; the fan blade 30 is arranged in the air outlet cavity 11, and the edge of the fan blade 30 is arranged close to the inner wall of the air outlet cavity 11. The inner wall of the air inlet hole 13 is surrounded by a flange 131, and the flange 131 is bent toward one end of the fan blade 30. The inner wall of the air outlet hole 15 is surrounded by a flow blocking step 151, and the flow blocking step 151 is arranged away from the other end of the fan blade 30.

[0032] It can be understood that the air outlet structure 100 can install and fix the air guide ring 10 on the supporting frame, so that under the supporting and fixing effect of the supporting frame, the airflow resistance encountered by the air outlet structure 100 when guiding the airflow can be overcome, thereby achieving a stable blowing effect of the air outlet structure 100 and improving the structural stability and reliability of the fan.

[0033] In the present application, the fan blades 30 rotate in the air guide ring 10, and the fan blades 30 can be used to disturb the airflow in the air outlet cavity 11, so that a certain pressure environment can be formed in the air outlet cavity 11, so that the air outlet structure 100 can suck the airflow in the environment into the air outlet cavity 11 through the air inlet hole 13, and then the airflow can be blown out from the air outlet hole 15 at a certain wind speed and wind force through the turbulence and wind gathering of the fan blades 30, so as to achieve the blowing effect of the fan. At this time, by setting the blade edge of the fan blade 30 close to the inner wall of the air outlet cavity 11, the fan blade 30 can better disturb the airflow in the entire air outlet cavity 11 under the premise of ensuring that the fan blade 30 will not collide and interfere with the air guide ring 10 when rotating, so that the airflow blown out through the air outlet structure 100 can have a higher flow rate and wind volume, and the air outlet effect of the fan can be better improved.

[0034] By surrounding the inner wall of the air inlet hole 13 of the air guide ring 10 with a flange 131, the flange 131 can be a circular ring structure protruding on the inner wall of the air inlet hole 13, and the thickness of the flange 131 can be greater than the width of the gap between the edge of the fan blade 30 and the inner wall of the air outlet cavity 11. Furthermore, when part of the airflow entering through the air inlet hole 13 is affected by the centrifugal action of the fan blade 30 and flows back toward the air outlet hole 15 through the gap between the edge of the fan blade 30 and the inner wall of the air outlet cavity 11, the flange 131 can be used to block part of the reflux airflow and flow into the air outlet cavity 11, thereby effectively avoiding the loss of the air intake airflow of the air outlet structure 100. In addition, by recessing part of the inner wall of the air outlet hole 15 of the air guide ring 10 close to the air outlet side to form an annular flow blocking step 151, the flow blocking step 151 can be set close to the end of the fan blade 30 facing away from the air outlet hole 15. In this way, when part of the airflow flowing out from the end edge of the fan blade 30 is diffused by the centrifugal action of the fan blade 30 and flows back toward the air inlet hole 13, the part of the refluxed airflow can be blocked by the flow blocking step 151, so that the refluxed airflow can flow to the air outlet hole 15 for discharge under the blocking effect of the flow blocking step 151, thereby effectively avoiding a reduction in the airflow rate of the air outlet structure 100. Therefore, under the action of the flange 131 on the inner wall of the air inlet hole 13 and the flow-blocking step 151 on the inner wall of the air outlet hole 15, the air outlet structure 100 can be ensured to suck a larger airflow into the air outlet cavity 11, and the air volume of the air blowing through the air outlet hole 15 can be made larger, thereby effectively reducing the backflow loss of the airflow during air intake or air outlet, ensuring the large air volume and stable air outlet effect of the air outlet structure 100, and improving the practicality and reliability of the air outlet structure 100.

[0035] The technical solution of the utility model is to set a flange 131 on the inner wall of the air inlet hole 13 of the air guide ring 10, and set a flow blocking step 151 on the inner wall of the air outlet hole 15 of the air guide ring 10. The flange 131 can be used to block the inlet return airflow of the air outlet structure 100, and the flow blocking step 151 can be used to block the outlet return airflow of the air outlet structure 100, thereby effectively reducing the inlet airflow loss and the outlet airflow loss of the air outlet structure 100, and better improving the inlet air volume and the outlet air volume of the air outlet structure 100, so that the fan can achieve a more stable and reliable large air volume outlet effect, further improving the practicality and reliability of the air outlet structure 100.

[0036] See also Figure 6 and Figure 7 In an embodiment of the utility model, the flange 131 is provided with a first choke groove 1311, and the notch of the first choke groove 1311 is arranged toward one end of the fan blade 30, and the baffle step 151 is provided with a second choke groove 1511, and the notch of the second choke groove 1511 is arranged away from the other end of the fan blade 30.

[0037] In this embodiment, the side of the flange 131 facing the end of the fan blade 30 can be recessed to set the first choke groove 1311, or the flange 131 can be bent and connected to the inner wall of the air inlet hole 13 to tilt up and enclose the inner wall of the air inlet hole 13 to form the first choke groove 1311. Under the action of the first choke groove 1311, part of the airflow of the incoming air return can flow into the first choke groove 1311 from one side wall of the first choke groove 1311, and under the guiding action of the bottom wall of the first choke groove 1311, the airflow can flow from the other opposite side wall of the first choke groove 1311 to the air outlet cavity 11, so that the airflow of the incoming air return can be more smoothly blocked by the flange 131 and flow into the air outlet cavity 11, thereby better reducing the loss of the incoming airflow and further improving the practicality and reliability of the air outlet structure 100. Among them, the first choke groove 1311 can be set in a semicircular groove structure, so that the flange 131 can use the inner wall of the arc groove of the first choke groove 1311 to more smoothly block the airflow guided by the inlet return flow into the air outlet cavity 11, which is conducive to better reducing the blocking and attenuation of the airflow velocity by the flange 131, so that the air outlet structure 100 can achieve a better air outlet effect.

[0038] In addition, the step surface of the baffle step 151 can be recessed to form a second baffle groove 1511. Under the action of the second baffle groove 1511, part of the airflow of the outlet return flow can flow into the second baffle groove 1511 from one side wall of the second baffle groove 1511, and under the guiding action of the groove bottom wall of the second baffle groove 1511, the airflow is blown out of the air outlet structure 100 from the other opposite side wall of the second baffle groove 1511 toward the air outlet hole 15, so that the airflow of the outlet return flow can be more smoothly blocked by the baffle step 151 and better flow to the air outlet hole 15 for outlet, thereby better reducing the loss of the outlet airflow and further improving the practicality and reliability of the air outlet structure 100. Among them, the second flow-blocking groove 1511 can be set in a semicircular groove structure, so that the flow-blocking step 151 can use the inner wall of the arc groove of the second flow-blocking groove 1511 to more smoothly block the airflow guided to the backflow of the air outlet from flowing toward the air outlet 15, which is conducive to better reducing the blocking and attenuation of the airflow velocity by the flow-blocking step 151, so that the air outlet structure 100 can achieve a better air outlet effect.

[0039] See also Figure 2 , Figure 3 and Figure 5In an embodiment of the utility model, the fan blade 30 includes a hub 31, at least two first blades 33 and at least two second blades 35. A centrifugal air duct 311 is formed in the hub 31. The centrifugal air duct 311 runs through the hub 31. The two ends of the centrifugal air duct 311 are respectively connected to the air inlet 13 and the air outlet 15; at least two first blades 33 are connected to the outer periphery of the hub 31 at intervals, and the edge of the first blade 33 facing away from the hub 31 is arranged close to the inner wall of the air outlet cavity 11; at least two second blades 35 are arranged in the centrifugal air duct 311 and are connected to the inner wall of the hub 31 at intervals.

[0040] In this embodiment, by setting the first blade 33 of the fan blade 30 on the periphery of the hub 31 and setting the second blade 35 on the inner wall of the hub 31, the first blade 33 can be set as an oblique flow blade and the second blade 35 can be designed as a centrifugal blade. When the fan blade 30 rotates, the first blade 33 and the second blade 35 can rotate synchronously, so that the air outside the air outlet structure 100 can be diverted through the air inlet hole 13 to enter the air outlet cavity 11 and the centrifugal air duct 311, and form an airflow under the turbulent effect of the first blade 33 and the second blade 35. At this time, the airflow is affected by the centrifugal effect when flowing in the centrifugal air duct 311 and flows on the inner wall of the hub 31, so that the airflow in the centrifugal air duct 311 can flow along the inner wall of the hub 31 to the air outlet 15, which is conducive to maintaining a higher air pressure for the airflow flowing out through the centrifugal air duct 311. In the air outlet chamber 11, the air flow passes through the turbulence of the first blade 33 and flows under the action of the larger spatial diffusion in the air outlet chamber 11, so that the air flow flowing into the air outlet hole 15 from the air outlet chamber 11 can have a larger air volume. At this time, the air flow flowing into the air outlet hole 15 from the air outlet chamber 11 after passing through the turbulence of the first blade 33 can be merged with the air flow flowing into the air outlet hole 15 after being disturbed by the second blade 35 in the centrifugal air duct 311, and then the two air flows can be merged in the air outlet chamber 11 and then blown out of the air outlet structure 100, so that the air flow blown out by the fan can have a better air volume and a more appropriate wind pressure, so that the fan can achieve a better air outlet effect, and the practicality and reliability of the air outlet structure 100 are further improved.

[0041] By making the fan blade 30 adopt a hollow hub 31 design, and respectively arranging the first blade 33 and the second blade 35 on the inner and outer wall surfaces of the hub 31, the fan blade 30 can achieve a mixed turbulent flow outlet effect of oblique flow outlet and centrifugal outlet, effectively improving the blowing effect of the fan. A centrifugal air duct 311 is formed at the center of the hub 31, and the centrifugal air duct 311 can be used to better increase the air inlet area of ​​the air outlet structure 100, increase the air inlet volume of the air outlet structure 100, and better achieve a large air volume outlet effect of the air outlet structure 100.

[0042] See also Figure 2 , Figure 3 and Figure 5In an embodiment of the present utility model, the width of the hub 31 is configured to gradually increase from the air inlet 13 toward the air outlet 15. And / or, the projection of the first blade 33 on the outer periphery of the hub 31 is arranged in an arc shape. And / or, the projection of the second blade 35 on the inner wall of the hub 31 is arranged in an arc shape.

[0043] In this embodiment, by gradually increasing the width of the hub 31 along the air outlet direction, the hub 31 can be made into a trumpet-shaped structure that gradually expands toward the air outlet 15. In this way, the fan blades 30 can better guide the air obliquely, so that the rotation of the first blade 33 can drive the air to perform centrifugal and axial motion at the same time, forming an oblique airflow, and then the airflow can be better guided by the oblique flow guiding effect of the first blade 33 and the gradually expanding guiding effect of the hub 31. The direction is almost parallel to the direction of the airflow guided to the air outlet 15 by the second blade 35, which makes it easier for the airflow flowing out of the air outlet cavity 11 and the airflow flowing out of the centrifugal air duct 311 to better merge in the air outlet 15, reduce the turbulence generated after the airflow merges, and further improve the practicality and reliability of the air outlet structure 100.

[0044] Secondly, the first blade 33 can be arranged at an angle with the rotation center axis of the hub 31, so that the first blade 33 can be arranged on the outer periphery of the hub 31 in the form of an arc-shaped curved plate, so that the effective width of the first blade 33 contacting the disturbed airflow can be increased, so that the airflow can be better disturbed by the fan blade 30 in the air outlet cavity 11, and under the action of the arc-shaped first blade 33, the airflow can flow more smoothly along the surface of the first blade 33, which can better reduce the attenuation of the airflow velocity and further improve the stable air outlet effect of the air outlet structure 100. Among them, the first blade 33 can be arranged in a structure of an arc-shaped sheet with a certain curvature, which is conducive to better simplifying the overall structure of the first blade 33, reducing the production cost of the first blade 33, and further improving the practicality and reliability of the air outlet structure 100; or the first blade 33 can be arranged in an arc-shaped blade structure similar to a spiral, and the use of this form of the first blade 33 can make the disturbed airflow in the air outlet cavity 11 have a specific larger airflow pressure effect, which is conducive to better improving the blowing effect of the air outlet structure 100.

[0045] In addition, the second blade 35 can be set at an angle with the rotation center axis of the hub 31, so that the second blade 35 can be set on the outer periphery of the hub 31 in the form of an arc-shaped bent plate. This can increase the effective width of the second blade 35 in contact with the disturbed airflow, so that the airflow can be better affected by the flow guidance and disturbance of the fan blade 30 in the centrifugal air duct 311, and under the action of the arc-shaped second blade 35, the airflow can flow more smoothly along the surface of the second blade 35, which can better reduce the attenuation of the airflow velocity and further improve the stable air outlet effect of the air outlet structure 100.

[0046] See also Figures 2 to 5 In an embodiment of the present utility model, the air outlet structure 100 further includes a driving device 50 , which is connected to the fan blades 30 and drives the fan blades 30 to rotate.

[0047] In this embodiment, the air outlet structure 100 can use a drive device 50 such as a motor to drive the fan blades 30 to rotate, so as to ensure that the fan blades 30 have a stable turbulent effect on the air in the air outlet cavity 11. At this time, the drive device 50 can be connected to the hub 31 using an outer rotor motor with a hollow shaft, so that the hollow shaft of the drive device 50 is connected to the centrifugal air duct 311, avoiding the blocking of the centrifugal air duct 311 by the drive device 50, and ensuring the dual-channel stable air intake of the air outlet structure 100; or, the drive device 50 can be set with a motor smaller than the width of the centrifugal air duct 311, so that the drive device 50 can be set in the centrifugal air duct 311 to connect the second blade 35 or the hub 31, thereby driving the fan blades 30 to rotate, and the airflow in the centrifugal air duct 311 can flow out from the gap between the drive device 50 and the inner wall of the hub 31, avoiding the blocking of the centrifugal air duct 311 by the drive device 50, ensuring the stable dual-channel air intake and air outlet of the air outlet structure 100, and further improving the practicality and reliability of the air outlet structure 100.

[0048] See also Figure 3 and Figure 5 In the embodiment of the utility model, the fan blade 30 further includes a connecting member 37, the connecting member 37 is arranged in the centrifugal air duct 311, and the second blade 35 is arranged between the connecting member 37 and the inner wall of the hub 31, and connects the connecting member 37 and the inner wall of the hub 31. The driving device 50 is provided with a rotating shaft, one end of which is plugged into the connecting member 37.

[0049] In this embodiment, the air outlet structure 100 can be provided with a connector 37 in the centrifugal air duct 311. The connector 37 can be a block structure with a certain structural strength, and the size of the connector 37 is set smaller than the size of the centrifugal air duct 311. In this way, by setting the connector 37 on the rotation center axis of the fan blade 30, and connecting the second blade 35 to the inner wall of the hub 31 and the connector 37, the air can be disturbed between the connector 37 and the inner wall of the hub 31 to form an airflow after entering from the air inlet end of the incoming air flow, thereby ensuring the stable flow of the airflow in the centrifugal air duct 311. Under the connecting action of the second blade 35, the hub 31 and the connecting piece 37 can form an integral structure more stably, thereby ensuring the overall structural stability of the fan blade 30, and then the driving device 50 can be arranged corresponding to the connecting piece 37, so that the motor shaft of the driving device 50 is plugged into the connecting piece 37, and the driving device 50 can be better utilized to drive the entire fan blade 30 through the connecting piece 37, thereby ensuring the stable and reliable operation of the air outlet structure 100, realizing the dual-channel air outlet effect of the air outlet cavity 11 of the air outlet structure 100 and the centrifugal air duct 311, and further improving the practicality and reliability of the air outlet structure 100.

[0050] See also Figures 1 to 3 In an embodiment of the utility model, the air outlet structure 100 further includes a drainage cover 70 , which is connected to the air guide ring 10 and covers the air outlet hole 15 , and the drainage cover 70 forms a drainage channel connected to the air outlet hole 15 .

[0051] In this embodiment, by setting a guide cover 70 at the end of the air guide ring 10 to cover the air outlet 15, the guide cover 70 can play a certain protective role on the fan blades 30, which is helpful to prevent the user from accidentally touching the fan blades 30 during the operation of the fan, which may cause harm to the user. At the same time, it can prevent the debris in the environment from entering the air outlet cavity 11 and colliding with the fan blades 30 to damage the fan blades 30, further improving the practicality and reliability of the air outlet structure 100. Among them, a plurality of long strips of guide channels can be formed on the guide cover 70, so that the airflow gathered in the air outlet 15 can be blown out from the guide channel more stably, ensuring the stable air outlet effect of the air outlet structure 100.

[0052] See also Figure 3In an embodiment of the utility model, the guide cover 70 includes an inner cover ring 71, an outer cover ring 73 and spoiler ribs 75. The inner cover ring 71 includes a guide section 711 and a guide section 713. The guide section 713 is connected to the guide section 711 and is arranged in the centrifugal air duct 311. At least part of the edge of the second blade 35 is arranged close to the outer periphery of the guide section 713; the outer cover ring 73 is connected to one end of the air guide ring 10 and is covered on the outer periphery of the guide section 711. The outer cover ring 73 and the guide section 711 are enclosed to form a guide channel; the spoiler ribs 75 are arranged in the guide channel and connect the outer periphery of the guide section 711 and the inner wall of the outer cover ring 73.

[0053] In this embodiment, the air guide cover 70 can be provided with a plurality of spoiler ribs 75 between the inner cover ring 71 and the outer cover ring 73 to form a drainage channel, so as to realize the protective effect of the air guide cover 70 on the fan blades 30 and avoid the air guide cover 70 from obstructing the air flow. At this time, the air guide cover 70 can be provided with an external thread or a card slot on the outer periphery of the outer cover ring 73, and an internal thread or a card protrusion can be provided on the inner wall of the air outlet hole 15 of the air guide ring 10; or, an internal thread or a card protrusion can be provided on the inner wall of the outer cover ring 73, and an external thread or a card slot can be provided on the inner wall of the air outlet hole 15 of the air guide ring 10, so that the outer cover ring 73 can be threadedly connected or card-connected with the air guide ring 10 to realize the detachable connection between the air guide cover 70 and the air guide ring 10, so that the air outlet structure 100 can be disassembled for cleaning and maintenance after being used for a certain period of time, and the practicality and reliability of the air outlet structure 100 can be further improved.

[0054] The inner cover ring 71 may include a guide section 711 and a guide section 713, wherein the guide section 711 is a part coaxially matched with the outer cover ring 73, and the spoiler rib 75 connects the guide section 711 and the inner wall of the outer cover ring 73 to ensure the stability of the overall structure of the guide cover 70. At this time, the guide section 713 can be inserted into the centrifugal air duct 311 through the air outlet 15 after the guide cover 70 is installed on the air guide ring 10. The size of the guide section 713 can be smaller than the size of the centrifugal air duct 311, so that the airflow in the centrifugal air duct 311 can flow out to the air outlet 15 through the gap between the guide section 713 and the inner wall of the hub 31, ensuring the stable outlet of the airflow in the centrifugal air duct 311. Under the cooperation of the guide section 713 and the hub 31, the channel structure of the centrifugal air duct 311 for air flow can be set in a circular ring shape, which is conducive to reducing the air flow turbulence in the centrifugal air duct 311, facilitating the convergence and outflow of the air flow in the centrifugal air duct 311, and achieving a better air outlet effect of the air outlet structure 100. In addition, when the air outlet structure 100 is provided with a drive device 50 such as a motor to drive the fan blades 30 to rotate, the drive device 50 can be installed in the guide section 713, which is conducive to better allowing the drive device 50 to avoid the fan blades 30, ensuring the stable air outlet of the air outlet structure 100, and further improving the structural stability and reliability of the air outlet structure 100.

[0055] See also Figures 1 to 3 In an embodiment of the present utility model, the air outlet structure 100 further includes an air filter assembly 90 , which is connected to the air guide ring 10 and covers the air inlet hole 13 .

[0056] In this embodiment, an air filter assembly 90 is provided at the air inlet 13 of the air outlet structure 100. The air filter assembly 90 may be a filter screen, filter cotton, etc., so that the air entering the air guide circle 10 can be filtered to a certain extent under the action of the air filter assembly 90, thereby preventing foreign matter such as dust and sand in the air from entering the air guide circle 10 along with the air, preventing foreign matter from interfering with the fan blades 30 in the air guide circle 10, and further improving the structural stability and reliability of the air outlet structure 100. Among them, when the fan blade 30 adopts a hybrid fan blade 30 in which the first blade 33 and the second blade 35 are respectively arranged on the outer periphery and the inner wall of the hollow hub 31, the air filter component 90 can adopt a multiple filter core material setting with better adsorption effect. At this time, under the centrifugal turbulence effect of the second blade 35 in the centrifugal air duct 311 of the hub 31, the air flow pressure generated by the disturbance of the fan blade 30 can be made large, which is conducive to better improving the suction force of the air outlet structure 100 on the air in the environment, so that the air can better pass through the air filter component 90 and enter the air outlet cavity 11, thereby achieving better filtering and cleaning of the air, better improving the clean air outlet effect of the fan, and further improving the practicality and reliability of the air outlet structure 100.

[0057] The utility model also proposes a fan, which includes a bracket and an air outlet structure 100. The specific structure of the air outlet structure 100 refers to the above embodiment. Since the fan adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0058] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air outlet structure, characterized in that: include: An air guide ring, wherein an air outlet cavity is formed in the air guide ring, and an air inlet hole and an air outlet hole communicating with the air outlet cavity are respectively provided at two ends of the air guide ring; and A fan blade, wherein the fan blade is disposed in the air outlet cavity, and an edge of the fan blade is disposed close to an inner wall of the air outlet cavity; The inner wall of the air inlet hole is surrounded by a flange, and the flange is bent toward one end of the fan blade. The inner wall of the air outlet hole is surrounded by a flow blocking step, and the flow blocking step is arranged away from the other end of the fan blade.

2. The air outlet structure according to claim 1, characterized in that: The flange is provided with a first choke groove, the notch of which is arranged toward one end of the fan blade, and the baffle step is provided with a second choke groove, the notch of which is arranged away from the other end of the fan blade.

3. The air outlet structure according to claim 1, characterized in that: The fan blades include: A wheel hub, wherein a centrifugal air duct is formed in the wheel hub, the centrifugal air duct runs through the wheel hub, and two ends of the centrifugal air duct are respectively connected to the air inlet and the air outlet; At least two first blades, at least two of which are connected to the outer periphery of the hub at intervals, and the edges of the first blades facing away from the hub are arranged close to the inner wall of the air outlet cavity; At least two second blades are disposed in the centrifugal air duct and are connected to the inner wall of the hub at intervals.

4. The air outlet structure according to claim 3, characterized in that: The width of the hub is configured to gradually increase along the direction from the air inlet to the air outlet; And / or, the projection of the first blade on the outer periphery of the hub is arranged in an arc shape; And / or, the projection of the second blade on the inner wall of the hub is arranged in an arc shape.

5. The air outlet structure according to claim 3, characterized in that: The air outlet structure also includes a driving device, which is connected to the fan blades and drives the fan blades to rotate.

6. The air outlet structure according to claim 5, characterized in that: The fan blade further includes a connecting member, the connecting member is arranged in the centrifugal air duct, and the second blade is arranged between the connecting member and the inner wall of the hub, and connects the connecting member and the inner wall of the hub; The driving device is provided with a rotating shaft, one end of which is plugged into the connecting piece.

7. The air outlet structure according to claim 3, characterized in that: The air outlet structure further comprises a drainage cover, which is connected to the air guide ring and covers the air outlet hole. The drainage cover is formed with a drainage channel connected to the air outlet hole.

8. The air outlet structure according to claim 7, characterized in that: The drainage cover comprises: An inner cover ring, the inner cover ring comprising a flow guide section and a flow guide section, the flow guide section is connected to the flow guide section and is arranged in the centrifugal air duct, and at least a portion of the edge of the second blade is arranged close to the outer periphery of the flow guide section; An outer cover ring, the outer cover ring is connected to one end of the air guide ring and is covered on the outer periphery of the drainage section, the outer cover ring and the drainage section are enclosed to form the drainage channel; The spoiler rib is arranged in the drainage channel and connects the outer periphery of the drainage section and the inner wall of the outer cover ring.

9. The air outlet structure according to any one of claims 1 to 8, characterized in that: The air outlet structure also includes an air filter component, which is connected to the air guide ring and covers the air inlet hole.

10. A fan, characterized in that: The fan comprises a bracket and an air outlet structure, wherein the air outlet structure is the air outlet structure according to any one of claims 1 to 9, and the air outlet structure is installed on the bracket.

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