Pressurized air outlet device

Abstract

The utility model relates to fan equipment technical field, especially a kind of pressurized air outlet equipment, pressurized air outlet equipment includes air outlet barrel, air outlet barrel includes outer tube and fixed base, fixed base includes fixed part and multiple guide vanes, fan is fixedly connected fixed part, the outer peripheral wall of fixed part includes first straight wall section and first arc face end, each first arc face end is located the end portion of first straight wall section close to fan, each guide vane includes second straight wall section and second arc face end, second arc face end is located the end portion of second straight wall section close to fan, first straight wall section is connected with second straight wall section, an avoidance space is formed between each second arc face end and first arc face end, so that first straight wall section and second straight wall section are integrated structure. The utility model aims at using the air outlet barrel produced by integrated production to realize airflow optimization effect.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, and in particular to a pressurized air outlet device. Background Technology

[0002] Existing fan equipment typically houses the fan blades within the fan's air outlet cavity, allowing the airflow to enter the outlet cavity from the inlet as the blades rotate. The airflow is then agitated and blown out from the outlet at a certain speed and force, achieving the fan's blowing effect.

[0003] In related technologies, in order to achieve the pressurization effect of a fan, the airflow area of ​​the fan gradually contracts from the air inlet to the air outlet. From the perspective of the airflow path, the specific structure of the fan consists of an air inlet grille, a fan assembly, and an air outlet. The fan assembly includes fan blades and a fan. One end of the fan is fixedly connected to the air outlet, and the other end of the motor is driven to the fan blades. In this way, the motor drives the fan blades to rotate, so that the air in the environment enters from the air inlet of the air inlet grille, is centrifugally pressurized at the fan blades, and then discharged at the air outlet.

[0004] If the air outlet needs to achieve a flow guiding effect, a flow guide vane needs to be installed inside the air outlet. To achieve this effect, the end of the flow guide vane near the fan blade assembly needs to be arc-shaped to give it an arc-shaped flow guiding surface. However, this arc-shaped flow guiding surface design causes the flow guide vane to overlap with other surfaces of the air outlet to a certain extent. After injection molding, the air outlet needs to be demolded. The demolding process is difficult, and the current production process requires a manual assembly step, where the flow guide vane needs to be manually assembled into the air outlet, resulting in low efficiency. Utility Model Content

[0005] The main purpose of this invention is to propose a pressurized air outlet device, which aims to achieve airflow optimization by using an integrated air outlet duct.

[0006] To achieve the above objectives, the pressurized air outlet device proposed in this utility model includes a fan assembly and an air outlet duct. The fan assembly includes fan blades and a fan. The fan blades include an inner hub, an outer hub, at least two first blades, and at least two second blades. The inner hub is drivenly connected to the fan. The outer hub is coaxially arranged with the inner hub and is sleeved on the outer circumference of the inner hub, forming an air inlet channel between the outer hub and the inner hub. At least two first blades are spaced apart and connected to the outer circumference of the outer hub. At least two second blades are spaced apart and disposed within the air inlet channel, connecting the outer hub and the inner hub. The air outlet duct includes an outer duct, a fixed base, and multiple guide vanes. The fan is connected to the fixed base, and the fixed base and the guide vanes are disposed within the outer duct. Each of the aforementioned guide vanes is located between the outer cylinder and the fixed base. Any two adjacent guide vanes, together with the fixed base and the outer cylinder, form an air outlet cavity. The air inlet channel connects to the air outlet cavity to form an airflow channel. The outer peripheral wall of the fixed base includes a first straight wall section and a first arc-shaped end. Each first arc-shaped end is located at the end of the first straight wall section near the air inlet side of the airflow channel. Each guide vane includes a second straight wall section and a second arc-shaped end. The second arc-shaped end is located at the end of the second straight wall section near the air inlet side of the airflow channel. The first straight wall section is connected to the second straight wall section. Each second arc-shaped end and the first arc-shaped end form a clearance space, so that the first straight wall section and the second straight wall section are an integral structure.

[0007] In one embodiment, the cross-sectional area of ​​the first arc-shaped end gradually increases along the airflow channel from the inlet side to the outlet side, and the outer surface of the first arc-shaped end forms a clearance surface; the cross-sectional area of ​​each second arc-shaped end gradually increases along the airflow channel from the inlet side to the outlet side, so that a clearance space is formed between the side of each second arc-shaped end facing the clearance surface and the clearance surface.

[0008] In one embodiment, the clearance surface is bent away from the outer cylinder, and each of the second arc surfaces is bent along the circumferential direction of the outer cylinder, so that each clearance space gradually increases in the direction from the air outlet side to the air inlet side along the airflow channel.

[0009] In one embodiment, the fixing part includes a first base and a second base, the second base is located on the outer peripheral surface of the first base, each of the guide vanes is disposed on the outer peripheral surface of the second base, the second base has a first straight wall section and a first arc end; the first base has a bearing support part, the bearing support part extends toward the air intake side of the airflow channel, and the fan is disposed on the bearing support part.

[0010] In one embodiment, the fan includes a fixed shaft, an inner stator, and an outer rotor. The fixed shaft is inserted into the bearing support and connected to the inner hub. The inner stator is fixedly sleeved on the outer surface of the bearing support. The outer rotor is rotatably connected to the inner stator. The inner hub is fixedly connected to the outer rotor.

[0011] In one embodiment, the fan assembly further includes a circuit board electrically connected to the fan; the first base, the second base, and the outer rotor enclose a heat dissipation space, and the circuit board is disposed on the bearing support and located within the heat dissipation space; the inner hub is spaced apart from the second base so that the heat dissipation space is connected to the air inlet channel.

[0012] In one embodiment, the inner hub extends toward the end of the second seat and into the heat dissipation space.

[0013] In one embodiment, the bottom wall of the second base is provided with a first wire passage, one of the guide vanes is provided with a wire passage channel, and the outer circumferential surface of the outer cylinder is provided with a second wire passage. The wire passage channel connects the first wire passage and the second wire passage; the first wire passage connects to the heat dissipation space.

[0014] In one embodiment, the end of the inner hub near the air intake side of the airflow channel has a guide arc surface, which is configured to guide air to the air outlet cavity.

[0015] In one embodiment, the projection of the first blade on the outer cylinder along the airflow channel outlet direction at least partially coincides with the guide blade.

[0016] In the technical solution of this utility model, the fixed base is provided with a first straight wall section and a first arc-shaped end, and the guide vane is provided with a second straight wall section and a second arc-shaped end. The first straight wall section and the second straight wall section are integral structures, and a clearance space is formed between the second arc-shaped end and the first arc-shaped end. This clearance space can provide sufficient space for demolding after the air outlet is injection molded, avoiding the demolding difficulties caused by the arc-shaped guide surface overlapping with other surfaces. Thus, the outer cylinder, fixed base and guide vane can be produced as a whole, without the need for manual assembly of the guide vane. This not only improves production efficiency, but also ensures the structural integrity of the air outlet. In addition, multiple guide vanes, the fixed part and the outer cylinder form an air outlet cavity. With the design of the straight wall section and the arc-shaped end, a good airflow guiding effect can still be achieved. Thus, while optimizing the airflow, the problem of low production efficiency is solved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the pressurized air outlet device provided by this utility model; Figure 2 for Figure 1 An exploded view of an embodiment of a pressurized air outlet device; Figure 3 for Figure 1 A cross-sectional view of an embodiment of a pressurized air supply device; Figure 4 A schematic diagram of the structure of an embodiment of the air outlet provided by this utility model; Figure 5 A schematic diagram of the structure of an embodiment of the fan blade provided by this utility model; Figure 6 for Figure 1 A flow diagram of the internal airflow direction of an embodiment of a pressurized air outlet device.

[0019] Explanation of icon numbers: 1000. Pressurized air supply equipment; 10. Fan assembly; 11. Fan blade; 111. Inner hub; 1111. Guide arc section; 1111a. Guide arc surface; 1112. Extended straight section; 1112a. Flow-limiting straight surface; 112. Outer hub; 11a. Air inlet channel; 113. First blade; 114. Second blade; 12. Fan; 121. Fixed shaft; 122. Inner stator; 123. Outer rotor; 13. Circuit board; 20. Air outlet duct; 20a. Air outlet cavity; 20b. Clearance space; 21. Outer cylinder; 21a. Receiving cavity; 21b. Second cable passage; 22. Fixing base; 221. First base body; 222. Second base body; 22a. First straight wall section; 22b. First arc-shaped end; 22c. Heat dissipation space; 22d. Heat dissipation guide channel; 222a. First cable passage; 23. Guide vane; 23a. Second straight wall section; 23b. Second arc-shaped end; 30. Air intake grille.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] In related technologies, in order to achieve the pressurization effect of the fan, the airflow area of ​​the fan gradually contracts from the air inlet to the air outlet. From the perspective of the airflow path direction, the specific structure of the fan is an air inlet grille 30, a fan assembly 10, and an air outlet duct 20. The fan assembly 10 includes a fan blade 11 and a fan 12. One end of the fan 12 is fixedly connected to the air outlet duct 20, and the other end of the fan 12 is drivenly connected to the fan blade 11. In this way, the fan 12 drives the fan blade 11 to rotate, so that the air in the environment enters from the air inlet of the air inlet grille 30, centrifugal pressurization is achieved at the fan blade 11, and then the air is discharged at the air outlet duct 20.

[0025] Based on the pressurizing effect of the fan blade 11, if the air outlet duct 20 needs to achieve a guiding effect, a guide vane 23 needs to be set inside the air outlet duct 20. In order for the guide vane 23 to achieve the guiding effect, the end of the guide vane 23 near the fan blade assembly needs to be set in an arc shape so that the guide vane 23 has an arc-shaped guiding surface. However, the design of the arc-shaped guiding surface causes the guide vane 23 to have a certain area of ​​connection and overlap with other surfaces of the air outlet duct 20. After the air outlet duct 20 is injection molded, it needs to be demolded. In the demolding process of the air outlet duct 20, the demolding action is difficult or even impossible. In order to improve the yield rate, the current production process of the air outlet duct 20 requires a manual assembly step. The guide vane 23 needs to be manually assembled into the air outlet duct 20, which causes low efficiency.

[0026] The main purpose of this utility model is to propose a pressurized air outlet device 1000, which aims to achieve airflow optimization effect using an integrated air outlet duct 20.

[0027] To achieve the above objectives, please refer to Figures 1 to 6 The pressurized air outlet device 1000 proposed in this utility model includes a fan assembly 10 and an air outlet duct 20. The fan assembly 10 includes fan blades 11 and a fan 12. The fan blades 11 include an inner hub 111, an outer hub 112, at least two first blades 113, and at least two second blades 114. The inner hub 111 is drivenly connected to the fan 12. The outer hub 112 is coaxially arranged with the inner hub 111 and is sleeved on the outer circumference of the inner hub 111. An air inlet channel 11a is formed between the outer hub 112 and the inner hub 111. At least two first blades 113 are spaced apart and connected to the outer circumference of the outer hub 112. At least two second blades 114 are spaced apart in the air inlet channel 11a and connect the outer hub 112 and the inner hub 111. The air outlet duct 20 includes an outer duct 21, a fixed base 22, and multiple guide vanes 23. The fan 12 is connected to the fixed base 22. The fixed base 22 and the guide vanes 23 are arranged on the outer duct 21. Inside the outer cylinder 21, each guide vane 23 is located between the outer cylinder 21 and the fixed base 22. Any two adjacent guide vanes 23, the fixed base 22, and the outer cylinder 21 enclose an air outlet cavity 20a. The air inlet channel 11a connects to the air outlet cavity 20a to form an airflow channel. The outer peripheral wall of the fixed base 22 includes a first straight wall section 22a and a first arc-shaped end 22b. Each first arc-shaped end 22b is located at the end of the first straight wall section 22a near the air inlet side of the airflow channel. Each guide vane 23 includes a second straight wall section 23a and a second arc-shaped end 23b. The second arc-shaped end 23b is located at the end of the second straight wall section 23a near the air inlet side of the airflow channel. The first straight wall section 22a is connected to the second straight wall section 23a. Each second arc-shaped end 23b forms a clearance space 20b with the first arc-shaped end 22b, so that the first straight wall section 22a and the second straight wall section 23a are an integral structure.

[0028] It is understood that the pressurized air outlet device 1000 includes an air inlet grille 30, a fan assembly 10, and an air outlet duct 20. The air outlet duct 20 includes an outer cylinder 21 and a fixing base 22. The volume of the outer cylinder 21 is larger than the volume of the fixing base 22. The outer cylinder 21 encloses a receiving cavity 21a, so that both the fan assembly 10 and the fixing base 22 can be placed within the receiving cavity 21a of the outer cylinder 21, thus protecting them. The air inlet grille 30 is connected to the air outlet duct 20 through snap-fit, screw-fit, adhesive, and combinations of various connection methods. The end of the fan assembly 1000 is fixedly connected. At the same time, the end face of the air inlet grille 30 facing the fan assembly 10 has multiple air inlets, which constitute the air inlet area. Meanwhile, the fan blades 11 of the fan assembly 10 have air inlet channels 11a, and the air outlet duct 20 has multiple air outlet chambers 20a. When the pressurized air outlet device 1000 is powered on, the fan 12 rotates, and the fan blades 11 connected to the fan 12 rotate synchronously. In this way, the air in the environment can enter the pressurized air outlet device 1000 from the air inlet area, and then be pressurized on the fan blades 11, and finally flow out from the air inlet, realizing the pressurized air flow.

[0029] Specifically, the fan blade 11 includes an inner hub 111, an outer hub 112, at least two first blades 113, and at least two second blades 114. By forming an air inlet channel 11a between the coaxially arranged outer hub 112 and inner hub 111, and by arranging multiple first blades 113 around the outer periphery of the outer hub 112, and by arranging multiple second blades 114 around the inner wall of the outer hub 112 and the outer wall of the inner hub 111 to connect the outer hub 112 and the inner hub 111, the fan blade 11 can adopt a combined air outlet form fan blade structure to achieve a better air outlet effect. The first blade 113 can be an axial flow blade or an oblique flow blade, and the second blade 114 can be a centrifugal blade. Since the number of centrifugal blades is not affected by the size of the hub or the hub ratio, it meets the design requirements of small hub and multiple blades, so that the inner hub 111 can adopt a smaller structural design. Therefore, compared with the fan blade structure with only axial flow blades, the number of second blades 114 with centrifugal blades can be increased, which is conducive to increasing the air intake volume of the first fan blade. At this time, by forming an air inlet channel 11a with the outer hub 112 and the inner hub 111, the outer hub 112 can guide the airflow turbulent by the second blade 114 under centrifugal force, so that the airflow generated by the second blade 114 is axially discharged along the axial direction of the first shaft section. At this time, the rotation of the first blade 113 can generate axial or oblique airflow, and then the airflow generated by the first blade 113 and the airflow generated by the second blade 114 can be combined and discharged from the air outlet cavity 20a. In this way, the fan blade 11 can generate a larger air volume, further increasing the air intake volume of the pressurized air outlet device 1000, which is conducive to better reducing the operating power of the fan 12 and improving the practicality and reliability of the blowing device. Among them, the second blade 114, which adopts the centrifugal blade form, can generate airflow with higher air pressure. Then, by mixing the airflow generated by the first blade 113 with the airflow generated by the second blade 114, the airflow generated by the fan blade 11 can have higher air pressure and flow rate, thus better improving the air outlet effect of the blowing device. Since the linear velocity inside the axial flow blade is less than that outside, the airflow generated by the axial flow blade has the characteristic of low velocity inside and high velocity outside. Therefore, when the first blade 113 is an axial flow blade, by setting the second blade 114 between the inner hub 111 and the outer hub 112, the airflow generated by the second blade 114 can make up for the deficiency of insufficient linear velocity inside the first blade 113, so that the first blade can blow out a more uniform airflow, better achieve the large air volume intake effect of the blower, and further improve the structural stability and reliability of the blower.

[0030] Subsequently, the airflow needs to be guided by the guide vanes 23 on the fixed seat 22 to optimize the airflow direction. In order to achieve airflow guidance, the ends of the guide vanes 23 near the fan blades 11 and the ends of the fixed seat 22 near the fan blades 11 have arc surfaces. The arc surfaces guide the airflow direction to achieve the desired guiding effect. To use an air outlet duct 20 with a guiding effect while ensuring production efficiency, injection molding is a more suitable process. However, the fact that the fixed seat 22 and the guide vanes 23 are all connected makes demolding difficult. Therefore, in this utility model, the fixed seat 22 and the guide vanes 23 are both segmented designs to form a clearance space 20b that facilitates demolding.

[0031] Specifically, the first straight wall section 22a of the fixed base 22 extends axially along the extension direction of the airflow channel, and its outer wall remains straight; while the first arc-shaped end 22b is connected to the end of the first straight wall section 22a near the airflow channel inlet side, and bends towards the central axis of the fixed base 22 to form a guiding arc surface adapted to the airflow direction. Correspondingly, the second straight wall section 23a of the guide vane 23 also extends axially along the extension direction of the airflow channel, and its end face facing the fixed base 22 is fixedly connected to the outer wall of the first straight wall section 22a of the fixed base 22 to form an integral structure, while its end face facing away from the fixed base 22 is connected to the inner wall of the outer cylinder 21; the second arc-shaped end 23b is connected to the end of the second straight wall section 23a near the airflow channel inlet side, and bends towards the circumferential direction of the outer cylinder 21, and its arc curvature is adapted to the curvature of the first arc-shaped end 22b. At this time, since the first arc end 22b and the second arc end 23b bend from the ends of the first straight wall section 22a and the second straight wall section 23a in different directions, a clearance space 20b extending in the axial direction is naturally formed between them. This clearance space 20b is located between the curved side of the first arc end 22b and the end face of the second arc end 23b facing the fixed seat 22. In this way, it does not affect the guidance of the airflow by the two arc ends, and the airflow can smoothly flow into the air outlet cavity 20a along the arc surface of the first arc end 22b and the second arc end 23b. It also provides sufficient operating clearance for the demolding action of the mold during injection molding.

[0032] From the perspective of demolding principle, the injection mold of the air outlet duct 20 typically includes a core arranged axially opposite to the inner side of the fixed seat 22 and a cavity corresponding to the outer side of the outer cylinder 21 and the outer side of the guide vane 23. Since the first straight wall section 22a of the fixed seat 22 and the second straight wall section 23a of the guide vane 23 are both straight structures and are integrally connected to form a continuous straight wall surface, the core and cavity of the mold can be directly separated along the extension direction of the straight wall section; while the clearance space 20b between the first arc end 22b and the second arc end 23b avoids the connection overlap between the two arc ends, so that the core and cavity will not be stuck by the arc structure during the separation process - the core can be pulled out axially from the inner side of the fixed seat 22, and the cavity can be pulled out axially from the outer side of the outer cylinder 21 and the outer side of the guide vane 23, without the need for a complex lateral core pulling mechanism, which greatly reduces the demolding difficulty. Meanwhile, this segmented design does not sacrifice the airflow guiding effect: the arc surfaces of the first arc end 22b and the second arc end 23b can still continuously guide the airflow flowing out of the air inlet channel 11a. The airflow first passes through the fan blade 11 and becomes a high-speed airflow, and then is guided into the air outlet cavity 20a by the arc surface of the first arc end 22b. At the same time, it is guided out of the outside of the air outlet cavity 20a by the arc surface of the second arc end 23b. Finally, under the synergistic effect of the two arc surfaces, it flows smoothly out along the axial direction of the air outlet cavity 20a, realizing the uniformity of airflow and the optimization of flow velocity, ensuring that the pressurization and airflow guiding effect of the pressurized air outlet device 1000 is comparable to that of the traditional structure with guide vanes 23.

[0033] In this invention, the curvature of the first arc end 22b and the second arc end 23b can be the same or different, as long as the bending directions of the two are different. It is only necessary to form a clearance space 20b at the end of the fixed seat 22 near the fan blade 11. Therefore, the curvature of the first arc end 22b and the second arc end 23b is not specifically limited.

[0034] In summary, by designing the fixed base 22 and the guide vane 23 as a segmented structure of "straight wall section + arc end", and utilizing the clearance space 20b between the arc ends to solve the demolding obstacle, the air outlet 20 of this utility model can be integrally formed by injection molding process, without the need for manual assembly of the guide vane 23. This not only ensures the airflow optimization effect, but also significantly improves production efficiency and reduces the errors and costs caused by manual assembly.

[0035] In the technical solution of this utility model, the fixed base 22 is provided with a first straight wall section 22a and a first arc-shaped end 22b, and the guide vane 23 is provided with a second straight wall section 23a and a second arc-shaped end 23b. The first straight wall section 22a and the second straight wall section 23a are integral structures, and a clearance space 20b is formed between the second arc-shaped end 23b and the first arc-shaped end 22b. This clearance space 20b can provide sufficient space for demolding after the air outlet duct 20 is injection molded, avoiding the problem of demolding difficulties caused by the arc-shaped guide surface overlapping with other surfaces. Thus, the outer cylinder 21, the fixed base 22 and the guide vane 23 can be produced as a whole, without the need for manual assembly of the guide vane 23. This not only improves production efficiency but also ensures the structural integrity of the air outlet duct 20. In addition, multiple guide vanes 23, the fixed base 22 and the outer cylinder 21 enclose an air outlet cavity 20a. With the design of the straight wall section and the arc-shaped end, a good airflow guiding effect can still be achieved, thereby solving the problem of low production efficiency while optimizing airflow.

[0036] Please see Figure 1 , Figure 3 , Figure 4 as well as Figure 5 In an embodiment of this utility model, the cross-sectional area of ​​the first arc end 22b gradually increases along the airflow channel from the air inlet side to the air outlet side, and the outer surface of the first arc end 22b forms a clearance surface; the cross-sectional area of ​​each second arc end 23b gradually increases along the airflow channel from the air inlet side to the air outlet side, so that a clearance space 20b is formed between the side of each second arc end 23b facing the clearance surface and the clearance surface.

[0037] In this embodiment, as the first arc-shaped end 22b extends along the airflow channel from the inlet side to the outlet side, its cross-sectional area gradually increases. This "expansion" design makes the outer surface of the first arc-shaped end 22b appear arc-shaped—this outer surface is defined as a "relief surface." The arc-shaped curvature of the relief surface reserves space for the subsequent setting of the second arc-shaped end 23b, avoiding structural overlap between the first arc-shaped end 22b and the second arc-shaped end 23b in the circumferential or axial direction. This fundamentally solves the problem of difficult demolding caused by overlap of traditional arc-shaped guide surfaces. Corresponding to the first arc-shaped end 22b, the second arc-shaped end 23b extends along the airflow channel from the inlet side to the outlet side. As the airflow extends in the direction of the outer cylinder 21, its cross-sectional area in the circumferential direction gradually increases, forming an arc-shaped side that converges towards the outside of the air outlet cavity 20a. The end face of the second arc-shaped end 23b facing the clearance surface of the first arc-shaped end 22b, and the clearance surface of the first arc-shaped end 22b, naturally form a clearance space 20b that extends along the airflow channel from the air inlet side to the air outlet side and has a gradually shrinking cross-section, because both extend along the airflow channel from the air inlet side to the air outlet side and their arc curvatures are matched. The size and shape of this space are determined by the convergence rate and curvature of the two arc-shaped ends, which not only ensures no structural overlap but also reserves a smooth passage for airflow guidance. The airflow channel is designed to facilitate airflow. Simultaneously, since the clearance surface of the first arc end 22b and the corresponding sides of the second arc end 23b both expand along the airflow channel from the inlet side to the outlet side, and there is no structural overlap between them, the core and cavity of the injection mold can be directly extracted along the airflow channel from the outlet side to the inlet side, without the need for additional lateral core pulling or complex demolding mechanisms. This not only reduces the difficulty of mold design but also significantly improves demolding efficiency and product yield, providing technological feasibility for the integrated molding of the air outlet 20. Furthermore, the bending shape of the two arc ends is highly compatible with the airflow path discharged from the fan blade 11, allowing airflow to flow from the inlet channel 11a to the outlet cavity 20. When airflow is flowing, it tends to move forward along the axial direction and diffuse circumferentially due to centrifugal force. The clearance surface of the first arc end 22b can guide the inner airflow near the fixed seat 22 to smoothly transition to the air outlet cavity 20a along the arc surface. The arc side of the second arc end 23b can guide the outer airflow near the outer cylinder 21 to merge into the air outlet cavity 20a. The clearance space 20b between the two serves as a "buffer transition zone" for the airflow, avoiding the formation of turbulence at the intersection of the inner and outer airflows. This ensures that the airflow flows evenly and smoothly in the air outlet cavity 20a, and finally maintains a stable flow velocity and pressure when discharged from the air outlet, thus achieving the goal of "not weakening the guiding effect".

[0038] In summary, this embodiment, by limiting the bending shape of the first arc end 22b and the second arc end 23b along the airflow channel from the air inlet side to the air outlet side, not only solves the demolding problem of traditional structures by avoiding the space 20b, realizing the one-piece injection molding of the air outlet 20, but also ensures the optimization of the air guiding effect by adapting the arc-shaped converging surface to the airflow path, thereby achieving a balance between production efficiency and product performance.

[0039] Further, please refer to Figure 1 , Figure 3 as well as Figure 4 The clearance surface is bent away from the outer cylinder 21, and each second arc end 23b is bent along the circumferential direction of the outer cylinder 21 so that each clearance space 20b gradually increases in the direction from the air outlet side to the air inlet side along the airflow channel.

[0040] In this embodiment, the clearance surface is curved off-center from the central axis of the outer cylinder 21, forming an asymmetrical arc-shaped surface. The second arc-shaped end 23b is uniformly curved along the circumferential direction of the outer cylinder 21. The two are structurally misaligned, so that each clearance space 20b is gradually expanded along the airflow channel from the outlet side to the inlet side. That is, the space near the first vertical wall section 22a is smaller, and the space away from the first vertical wall section 22a gradually increases. This structural design ensures the arc-shaped guiding effect of the guide vane 23 and the fixed seat 22 on the airflow path, effectively guiding the airflow along... The predetermined flow direction reduces eddy current and airflow losses, while the gradually expanding clearance space 20b provides sufficient clearance distance for injection molding demolding, preventing interference or jamming between the mold and the guide vanes 23 during core pulling, thus significantly reducing demolding difficulty and improving molding yield. Simultaneously, because the clearance space 20b gradually increases in size along the flow channel from the inlet side to the outlet side, the mold can slide smoothly during demolding, eliminating the need for complex side core pulling mechanisms or parting surface designs, further simplifying the mold structure, reducing manufacturing costs, and ensuring efficient and stable integrated production of the exhaust duct 20.

[0041] In one implementation, please refer to Figure 1 and Figure 3 The first straight wall section 22a and the first arc-shaped end 22b are arranged along the flow channel from the air inlet side to the air outlet side, and the second straight wall section 23a and the second arc-shaped end 23b are arranged along the flow channel from the air inlet side to the air outlet side; the first straight wall section 22a and the second straight wall section 23a extend along the flow channel from the air inlet side to the air outlet side.

[0042] In this embodiment, the first straight wall section 22a and the first arc-shaped end 22b are arranged along the flow channel from the air inlet side to the air outlet side, meaning that they are distributed sequentially in the axial direction of the pressurized air outlet device 1000. The first straight wall section 22a is located on the side near the tail end of the air outlet cavity 20a, while the first arc-shaped end 22b is located on the side near the fan blade 11. This arrangement makes the structure of the fixed base 22 form a transition from arc shape to straight in the axial direction, thereby creating the effect of first guiding the flow with an arc surface and then directing the flow with a straight surface; the second straight wall section 23a and The second arc-shaped end 23b is arranged along the flow channel from the air inlet side to the air outlet side. That is, the second straight wall section 23a is located near the tail of the air outlet cavity 20a, and the second arc-shaped end 23b is located near the fan blade 11. This layout allows the guide vane 23 to form an orderly connection between the straight section and the arc-shaped section in the axial direction. The second straight wall section 23a can stably connect the fixed base 22 and the outer cylinder 21, providing solid support for the guide vane 23, while the second arc-shaped end 23b can effectively guide the airflow near the outer cylinder 21. Furthermore, the first straight wall section 22a and the second straight wall section 23a extend along the flow channel from the air inlet side to the air outlet side, so that they maintain a straight extension in the axial direction. This design makes the structure of the fixed seat 22 and the guide vane 23 more regular, which is convenient for mold design and manufacturing. During injection molding, the straight extension structure can reduce the complexity of the mold and reduce the processing difficulty. On the other hand, the straight wall section extending along the flow channel from the air inlet side to the air outlet side provides a stable channel for the airflow in the middle of the air outlet cavity 20a, avoiding unnecessary disturbance to the airflow caused by structural bending and ensuring the smoothness of the airflow in this area.

[0043] Please see Figure 3 and Figure 4 In one embodiment, the fixing part includes a first seat 221 and a second seat 222. The second seat 222 is located on the outer peripheral surface of the first seat 221, and each guide vane 23 is disposed on the outer peripheral surface of the second seat 222. The second seat 222 has a first straight wall section 22a and a first arc end 22b. The first seat 221 has a bearing support part, which extends toward the air intake side of the airflow channel, and the fan 12 is disposed on the bearing support part.

[0044] In this embodiment, the mounting base 22 includes a first base 221 and a second base 222, achieving a clear division of functions and optimized structural adaptation. The first base 221 serves as the core support structure, with its bearing support extending towards the air intake side of the airflow channel, providing a stable mounting foundation for the fan 12. This ensures that the fan 12 maintains good coaxiality and stability during high-speed operation, reducing noise and energy loss caused by vibration. The second base 222, located on the outer periphery of the first base 221, not only connects to the guide vanes 23, but its first straight wall section 22a and first arc-shaped end 22b precisely match the second straight wall section 23a and second arc-shaped end 23b of the guide vanes 23, together forming a key structure for airflow guidance. Each guide vane 23 is connected to the outer peripheral surface of the second base 222, making the force transmission between the guide vane 23 and the fixed base 22 more uniform and improving the overall structural strength of the air outlet duct 20. At the same time, the clearance space 20b formed between the first arc end 22b of the second base 222 and the second arc end 23b of the guide vane 23, while ensuring effective guidance of the airflow from the fan blade 11 (the airflow near the fixed base 22 smoothly transitions along the first arc end 22b, and the airflow near the outer cylinder 21 smoothly merges along the second arc end 23b), further optimizes the demolding conditions during injection molding, making the integrated molding process of the first base 221, the second base 222 and the guide vane 23 more reliable, and ultimately achieving the integration of support stability, airflow guiding effect and production feasibility.

[0045] Further, please refer to Figure 2 and Figure 3 The fan 12 includes a fixed shaft 121, an inner stator 122 and an outer rotor 123. The fixed shaft 121 is inserted into the bearing support and connected to the inner hub 111. The inner stator 122 is fixedly sleeved on the outer surface of the bearing support. The outer rotor 123 is rotatably connected to the inner stator 122. The inner hub 111 is fixedly connected to the outer rotor 123.

[0046] In this embodiment, the fan is an external rotor motor, which achieves efficient transmission connection with the fan blades 11 through the structural cooperation of the fixed shaft 121, the inner stator 122, and the outer rotor 123. The fixed shaft 121 is inserted into the bearing support of the first base 221 and connected to the inner hub 111, providing stable axial positioning for the entire fan 12. The inner stator 122 is fixedly sleeved on the outer surface of the bearing support, forming the magnetic field foundation as the stationary part of the motor. The outer rotor 123 is rotatably connected to the outside of the inner stator 121, achieving rotational motion through electromagnetic induction. Because the inner hub 111 is fixedly connected to the outer rotor 123, when the outer rotor 123 rotates under the action of electromagnetic force, it can directly drive the inner hub 111 and the entire fan blades 11 to rotate synchronously, reducing energy loss in the transmission process and improving drive efficiency. This structural design makes the connection between the fan 12 and the fan blade 11 more compact, which not only reduces the overall axial dimension, but also reduces the radial runout of the fan blade 11 when it rotates at high speed through the stable support of the bearing support, ensuring the stability of the airflow in the air inlet channel 11a. At the same time, it forms a structural fit with the first seat 221 and the second seat 222 of the fixed seat 22, ensuring that the operating heat of the external rotor motor can be conducted and dissipated to the fixed seat 22 through the bearing support, further improving the operational reliability of the pressurized air outlet equipment 1000.

[0047] To achieve voltage and current stabilization for the fan, please refer to [link / reference needed]. Figure 4 The fan assembly 10 also includes a circuit board 13, which is electrically connected to the fan 12; the first base 221, the second base 222 and the outer rotor 123 enclose a heat dissipation space 22c, the circuit board 13 is located in the bearing support and within the heat dissipation space 22c; the inner hub 111 is spaced apart from the second base 222 so that the heat dissipation space 22c is connected to the air inlet channel 11a.

[0048] For the fan 12, the voltage and current regulation of its coil is one of the most important properties. The working state of the coil directly affects the operational stability, output power, and service life of the fan 12. The circuit board 13 plays a key role in this process. It can monitor the current and voltage changes of the fan 12 coil in real time and adjust them through internal electronic components to ensure that the coil always operates under stable electrical parameters, avoiding problems such as overheating, unstable speed, or even damage to the fan 12 due to voltage or current fluctuations. However, in the process of realizing real-time control of the fan 12, the circuit board 13 itself will also generate heat due to the operation of its electronic components. Especially during continuous high-load operation, if the accumulated heat cannot be dissipated in time, it will affect the performance stability of the electronic components on the circuit board 13, and may even lead to a decrease in control accuracy and accelerated component aging, thereby affecting the voltage and current regulation effect of the fan 12 coil.

[0049] Based on this, this embodiment constructs an efficient heat dissipation path by placing the circuit board 13 in the heat dissipation space 22c formed between the first base 221 and the second base 222, and by using the inner hub 111 and the second base 222 to be spaced apart along the radial direction of the outer cylinder so that the heat dissipation space 22c is connected to the air inlet channel 11a, effectively solving the heat dissipation problem of the circuit board 13. Specifically, the circuit board 13 is electrically connected to the fan 12, which can monitor and adjust the current and voltage of the fan 12 coil in real time to ensure its stable voltage and current operation. The heat dissipation space 22c provides an independent installation area for the circuit board 13, which avoids structural interference with other components and can also achieve heat dissipation by utilizing the airflow of the air inlet channel 11a: when the fan blade 11 rotates, a continuous airflow is generated in the air inlet channel 11a. Some of the airflow can enter the heat dissipation space 22c through the gap between the inner hub 111 and the second base 222, exchange heat with the circuit board 13, and then be discharged with the main airflow, so as to take away the heat generated by the circuit board 13 during operation and prevent its performance from degrading due to high temperature. Meanwhile, the heat dissipation space 22c is enclosed by the first base 221, the second base 222 and the outer rotor 123, with good structural sealing, which can reduce the corrosion of the circuit board 13 by external dust and moisture. With the continuous flow of air, it can not only ensure the heat dissipation efficiency of the circuit board 13, but also improve the cleanliness of its working environment, thereby ensuring the accuracy of the circuit board 13 in controlling the voltage and flow of the fan 12, extending the service life of the fan 12 and the entire fan assembly 10, and further optimizing the operational stability of the pressurized air outlet equipment 1000.

[0050] Understandably, the sealing of the circuit board 13 within the heat dissipation space 22c can be achieved by adding a dust filter at the entrance of the heat dissipation space 22c to further prevent the intrusion of foreign objects, ensuring smooth airflow for heat dissipation while maintaining the cleanliness of the working environment of the circuit board 13. In addition, the structural design of the heat dissipation space 22c can adopt a combination of a closed cavity and a guide air duct, allowing the airflow to flow along a preset path across the surface of the circuit board 13 without directly contacting its sensitive components. This achieves efficient heat dissipation while ensuring the sealing and protection of the circuit board 13, ensuring the long-term stable operation of electronic components in complex environments.

[0051] To ensure that a portion of the airflow in the intake channel always enters the heat dissipation space 22c, please refer to... Figure 4 and Figure 6 The inner hub 111 extends toward the end of the second seat 222 and extends into the heat dissipation space 22c.

[0052] In this embodiment, the end of the inner hub 111 near the air outlet side of the airflow channel extends toward the second seat 222 along the air outlet direction of the airflow channel, so that the end of the inner hub 111 near the second seat 222 forms an extended straight section 1112. The extended straight section 1112 extends into the heat dissipation space 22c. Since the inner hub 111 and the second seat 222 are spaced apart along the radial direction of the outer cylinder 21, a heat dissipation guiding channel 22d is formed between the extended straight section 1112 and the second seat 222. The heat dissipation guiding channel 22d connects the heat dissipation space 22c and the air inlet channel 11a. At the same time, the heat dissipation guiding channel 22d is aligned with the heat dissipation space 22c along the air outlet direction of the airflow channel. Thus, this structural design, through the deep arrangement of the extended straight section 1112, makes part of the airflow in the air inlet channel 11a continuously constrained in the extended straight section 1112, and flows into the heat dissipation space 22c in a directional manner along the heat dissipation guiding channel 22d, effectively avoiding the problem of interruption of heat dissipation air intake caused by airflow disturbance or pressure fluctuation. Meanwhile, the design of the length of the extended straight section 1112 extending into the heat dissipation space 22c allows for precise control of the length and cross-sectional size of the heat dissipation guide channel 22d according to heat dissipation requirements, ensuring that the airflow entering the heat dissipation space 22c remains within a reasonable range—meeting the heat dissipation needs of the circuit board 13 without excessive diversion affecting the main airflow of the outlet air chamber 20a. Furthermore, the heat dissipation guide channel 22d, formed by the extended straight section 1112 and the second base 222, has a regular structure and a fixed path, reducing energy loss during airflow transmission. This allows the cooling airflow to efficiently reach the heat dissipation space 22c and fully exchange heat with the circuit board 13, further improving heat dissipation efficiency and ensuring the long-term stable operation of the fan 12 under stable voltage and flow conditions.

[0053] Please see Figure 4 In one embodiment, the bottom wall of the second base 222 is provided with a first wire passage 222a, a guide vane 23 is provided with a wire passage channel, and the outer peripheral surface of the outer cylinder 21 is provided with a second wire passage 21b. The wire passage channel connects the first wire passage 222a and the second wire passage 21b; the first wire passage 222a connects to the heat dissipation space 22c.

[0054] In this embodiment, the wire passage is located inside a guide vane. The first wire passage 222a is located on the bottom wall of the second base 222, and the second wire passage 21b is located on the outer circumferential surface of the outer cylinder 21. The guide vane 23 is fixedly connected to the second base 222. Thus, regardless of vibration or displacement during fan operation, the wire can remain stably threaded through the passage, preventing electrical connection failure or short circuit risks due to loosening or friction. Furthermore, the first wire passage 222a, located on the bottom wall of the second base 222, directly connects to the heat dissipation space 22c. This allows the wire to not only achieve electrical connection during threading but also receive auxiliary cooling from the airflow within the heat dissipation space 22c. When the fan is running, the airflow entering the heat dissipation space 22c flows through the first wire passage 222a. The heat generated by the current flowing through the wires is carried away, effectively reducing the wire temperature and preventing overheating, aging, or even melting of the insulation layer due to prolonged high-load operation, thereby improving the safety and durability of the electrical system. In addition, the connection between the wire passage and the heat dissipation space 22c, and the second wire passage 21b located on the outer peripheral wall of the outer cylinder 21, can serve as a heat exhaust outlet, ensuring the airflow of the airflow path from the air inlet grille 30 to the air inlet channel 11a to the heat dissipation space 22c to the wire passage. At the same time, the orientation of the second wire passage 21b on the outer peripheral wall of the outer cylinder 21 and the orientation of the air outlet end of the air outlet cavity 20a have a certain angle or even a 90-degree angle. In this way, the hot airflow from the wire passage will not interfere with or mix with the pressurized airflow from the air outlet cavity 20a, thereby avoiding the adverse effects of hot air backflow on the temperature, pressure, and directional stability of the airflow.

[0055] To ensure that outside air can enter the air outlet chamber 20a and / or the heat dissipation space 22c, please refer to Figure 4 and Figure 6 The inner hub 111 has a guide arc surface 1111a at the end near the air intake side of the airflow channel, and the guide arc surface 1111a is configured to guide air to the air outlet cavity 20a.

[0056] In this embodiment, the inner hub 111 has a guide arc section 1111 at its end near the air intake side of the airflow channel. The cross-sectional area of ​​the guide arc section 1111 gradually increases along the direction of the airflow channel from the air intake side to the air outlet side to form a guide arc surface 1111a. Specifically, the guide arc section 1111 is located near the air intake side of the airflow channel, and its cross-sectional area gradually increases along the direction of the air intake side to the air outlet side to form an outwardly expanding guide arc surface 1111a. When outside air enters the air intake channel 11a, the guide arc surface 1111a can guide most of the airflow smoothly to the outer air outlet cavity 20a through the guiding effect of the arc-shaped surface, avoiding the formation of turbulence at the inlet and ensuring a stable airflow in the air outlet cavity 20a.

[0057] Please continue reading. Figure 3 In one embodiment, the guide arc segment 1111 and the extended straight segment 1112 are arranged along the air outlet direction of the airflow channel. The outer peripheral surface of the guide arc segment 1111 is a flat flow-limiting straight surface 1112a. This straight surface does not expand outward and can guide part of the airflow near the central axis of the inner hub 111 in the airflow channel to flow backward along the flow-limiting straight surface 1112a. Finally, it enters the heat dissipation space 22c through the gap between the inner hub 111 and the second seat 222, providing continuous cooling airflow for the circuit board 13. This collaborative design of "guide arc surface 1111a guiding the outer airflow to the air outlet cavity + flow-limiting straight surface 1112a guiding the inner airflow to the heat dissipation space" not only ensures the main airflow of the air outlet cavity 20a, but also meets the heat dissipation intake requirements of the heat dissipation space 22c. At the same time, the smooth transition between the arc surface and the straight surface reduces airflow resistance, improves the overall airflow efficiency, and further optimizes the operating performance of the pressurized air outlet device 1000.

[0058] Please see Figure 3 and Figure 6 In one embodiment, the projection of the first blade 113 onto the outer cylinder 21 along the airflow channel outlet direction at least partially coincides with the guide blade 23.

[0059] In this embodiment, the first blade 113 and the guide blade 23 are aligned along the airflow direction of the airflow channel, meaning that they overlap or correspond in the axial projection of the pressurized air outlet device 1000. When the fan blade 11 rotates, the first blade 113 pushes the airflow axially. Because the first blade 113 and the guide blade 23 are aligned in the axial direction, the airflow pushed by the first blade 113 can flow more directly and smoothly to the guide blade 23, reducing the deviation and diffusion of the airflow during propagation, and allowing the airflow to enter the air outlet cavity 20a enclosed by the guide blade 23 more concentratedly. The guide blade 23 can play a guiding role when the airflow arrives, guiding the airflow out of the air outlet cavity 20a according to the preset path, avoiding the formation of turbulent vortices between the first blade 113 and the guide blade 23, and reducing the loss of airflow energy. At the same time, this alignment design also makes the airflow less resistant during transmission, enabling the pressurized air outlet device 1000 to output a larger air volume and higher wind speed at the same power, improving the air outlet efficiency. In addition, the enhanced stability of airflow can reduce noise caused by airflow turbulence, improve the user experience of the pressurized air outlet 1000, and further enhance the overall performance of the equipment.

[0060] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pressurized air outlet device, characterized in that, The device includes a fan assembly (10) and an air outlet (20). The fan assembly (10) includes fan blades (11) and a fan (12). The fan blades (11) include an inner hub (111), an outer hub (112), at least two first blades (113), and at least two second blades (114). The inner hub (111) is connected to the fan (12) via a drive. The outer hub (112) is coaxially arranged with the inner hub (111) and is sleeved on the outer periphery of the inner hub (111). The outer hub (112) and the inner hub (111) are connected via a drive. An air inlet channel (11a) is formed between the outer and inner hubs (111); at least two first blades (113) are spaced apart and connected to the outer periphery of the outer hub (112); at least two second blades (114) are spaced apart within the air inlet channel (11a) and connect the outer hub (112) and the inner hub (111); the air outlet duct (20) includes an outer cylinder (21), a fixed base (22), and a plurality of guide vanes (23); the fan (12) is connected to the fixed base (22); the fixed base (22) and the guide vanes (23) are located on the outer cylinder (21). Inside the outer cylinder (21), each of the guide vanes (23) is located between the outer cylinder (21) and the fixed base (22). Any two adjacent guide vanes (23), the fixed base (22), and the outer cylinder (21) enclose an air outlet cavity (20a). The air inlet channel (11a) connects to the air outlet cavity (20a) to form an airflow channel. The outer peripheral wall of the fixed base (22) includes a first straight wall section (22a) and a first arc end (22b). Each first arc end (22b) is located near the first straight wall section (22a). At the end of the airflow channel on the air intake side, each of the guide vanes (23) includes a second straight wall section (23a) and a second arc-shaped end (23b). The second arc-shaped end (23b) is located at the end of the second straight wall section (23a) near the airflow channel on the air intake side. The first straight wall section (22a) is connected to the second straight wall section (23a). A clearance space (20b) is formed between each second arc-shaped end (23b) and the first arc-shaped end (22b) so that the first straight wall section (22a) and the second straight wall section (23a) are an integral structure.

2. The pressurized air outlet device as described in claim 1, characterized in that, The cross-sectional area of ​​the first arc-shaped end (22b) gradually increases along the airflow channel from the air inlet side to the air outlet side, and the outer surface of the first arc-shaped end (22b) forms a clearance surface; the cross-sectional area of ​​each second arc-shaped end (23b) gradually increases along the airflow channel from the air inlet side to the air outlet side, so that a clearance space (20b) is formed between the side of each second arc-shaped end (23b) facing the clearance surface and the clearance surface.

3. The pressurized air outlet device as described in claim 2, characterized in that, The clearance surface is bent away from the outer cylinder (21), and each second arc end (23b) is bent along the circumferential direction of the outer cylinder (21) so that each clearance space (20b) gradually increases in the direction from the air outlet side to the air inlet side along the airflow channel.

4. The pressurized air outlet device as described in any one of claims 1 to 3, characterized in that, The fixed base (22) includes a first base body (221) and a second base body (222). The second base body (222) is located on the outer peripheral surface of the first base body (221). Each of the guide vanes (23) is disposed on the outer peripheral surface of the second base body (222). The second base body (222) has a first straight wall section (22a) and a first arc end (22b). The first base body (221) has a bearing support portion. The bearing support portion extends toward the air intake side of the airflow channel. The fan (12) is disposed on the bearing support portion.

5. The pressurized air outlet device as described in claim 4, characterized in that, The fan (12) includes a fixed shaft (121), an inner stator (122), and an outer rotor (123). The fixed shaft (121) is inserted into the bearing support and connected to the inner hub (111). The inner stator (122) is fixedly sleeved on the outer surface of the bearing support. The outer rotor (123) is rotatably connected to the inner stator (122). The inner hub (111) is fixedly connected to the outer rotor (123).

6. The pressurized air outlet device as described in claim 5, characterized in that, The fan assembly (10) further includes a circuit board (13) electrically connected to the fan (12); the first base (221), the second base (222) and the outer rotor (123) enclose a heat dissipation space (22c), the circuit board (13) is disposed on the bearing support and located in the heat dissipation space (22c); the inner hub (111) is spaced apart from the second base (222) so that the heat dissipation space (22c) is connected to the air inlet channel (11a).

7. The pressurized air outlet device as described in claim 6, characterized in that, The inner hub (111) extends toward the end of the second seat (222) to form an extended straight section (1112), the extended straight section (1112) extends into the heat dissipation space (22c) and forms a heat dissipation guide channel (22d) between the second seat (222), the heat dissipation guide channel (22d) connecting the heat dissipation space (22c) and the air inlet channel (11a).

8. The pressurized air outlet device as described in claim 7, characterized in that, The bottom wall of the second base (222) is provided with a first wire passage (222a), a guide vane (23) is provided with a wire passage channel, and the outer peripheral surface of the outer cylinder (21) is provided with a second wire passage (21b). The wire passage channel connects the first wire passage (222a) and the second wire passage (21b); the first wire passage (222a) connects to the heat dissipation space (22c).

9. The pressurized air outlet device as described in claim 1, characterized in that, The inner hub (111) has a guide arc surface (1111a) at the end near the airflow channel, the guide arc surface (1111a) being configured to guide air to the air outlet (20a).

10. The pressurized air outlet device as described in claim 1, characterized in that, The projection of the first blade (113) on the outer cylinder (21) along the airflow channel outlet direction at least partially coincides with the guide blade (23).

Images