Air outlet device

Abstract

The utility model discloses an air outlet device, which relates to the technical field of blowing equipment, and comprises a shell and a fan assembly, and the shell is provided with an air inlet and an air outlet; the fan assembly comprises a fan body and fan blades, the fan blades are rotatably arranged in the shell and comprise an outer hub, an inner hub, first blades and second blades, the inner hub is in transmission connection with the fan body, the outer hub is arranged on the periphery of the inner hub in a sleeving mode, the first blades are arranged in the first air cavity and connected to the periphery of the outer hub, and the second blades are arranged in the second air cavity and connected to the periphery of the outer hub. The outer hub is connected with the inner hub; a drainage ring is arranged in the shell, the drainage ring is arranged on the side, facing the air outlet, of the fan blades and is close to the outer hub, the drainage ring extends along the rotating center axis of the fan blades, the drainage ring and the inner wall of the shell are spaced to form a first flow channel, and a second flow channel is defined in the drainage ring. According to the technical scheme provided by the utility model, mutual interference of air outlet airflow is reduced, and the reliability and the blowing effect of the air outlet device are improved.

Description

Technical Field

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

[0002] In related technologies, air outlet devices such as fans and hair dryers can adopt a combined fan blade structure to achieve a better air blowing effect.

[0003] However, the air pressure of the airflow formed by the centrifugal fan blades inside the combined fan blade structure is usually greater than that of the airflow formed by the axial or oblique flow fan blades on the outer periphery. This can easily cause the airflow formed inside the combined fan blades to compress the airflow formed outside the combined fan blades when it diffuses outward, resulting in obstruction of the airflow outside the combined fan blades. This affects the mixing effect of the two airflows inside and outside the combined fan blades and reduces the air volume of the air outlet device. Utility Model Content

[0004] The main purpose of this utility model is to propose an air outlet device that aims to guide the airflow inside the air outlet device, reduce mutual interference of the airflow, and improve the reliability and blowing effect of the air outlet device.

[0005] To achieve the above objectives, the air outlet device proposed in this utility model includes a housing and a fan assembly. The housing is provided with an air inlet and an air outlet. The fan assembly includes a fan body and fan blades. The fan blades are rotatably disposed within the housing. Each fan blade includes an outer hub, an inner hub, a first blade, and a second blade. The inner hub is drivenly connected to the fan body. The outer hub is sleeved on the outer periphery of the inner hub. The outer hub and the inner wall of the housing are spaced apart to form a first air cavity. The outer hub and the inner hub are spaced apart to form a second air cavity. The first blade is disposed in the first air cavity and connected to the outer periphery of the outer hub. The second blade is disposed in the second air cavity and connected to the outer hub and the inner hub. The housing is provided with a flow guide ring, which is located on the side of the fan blade facing the air outlet and close to the outer hub. The flow guide ring extends along the rotation center axis of the fan blade. The flow guide ring and the inner wall of the housing form a first flow channel. A second flow channel is formed within the flow guide ring. The first flow channel is connected to the first air cavity, and the second flow channel is connected to the second air cavity.

[0006] In one embodiment, the flow guide ring is provided with a first guide vane, which is disposed in the first flow channel and connects the outer wall of the flow guide ring and the inner wall of the housing.

[0007] In one embodiment, the housing is further provided with a fixing structure, which is located on the side of the fan blade facing the air outlet. The fan body is installed on the fixing structure, and the flow guide ring is sleeved on the outer periphery of the fixing structure. The inner wall of the flow guide ring and the outer wall of the fixing structure are spaced apart to form the second flow channel.

[0008] In one embodiment, the flow guide ring is provided with a second guide vane, which is disposed in the second flow channel and connects the inner wall of the flow guide ring and the outer wall of the fixed structure.

[0009] In one embodiment, the second guide vane is provided with a first wire passage, the two ends of which pass through the fixing structure and the drain ring respectively; the drain ring is also provided with a first guide vane connecting the outer wall of the drain ring and the inner wall of the housing, the first guide vane is provided with a second wire passage, the two ends of which pass through the drain ring and the housing respectively.

[0010] In one embodiment, the side of the fixing structure facing the fan blade is arranged in an arc shape.

[0011] In one embodiment, the inner diameter of the outer hub is configured to gradually increase in the direction toward the air outlet.

[0012] In one embodiment, the housing includes an air outlet and an air inlet shroud. The air guide ring is disposed inside the air outlet, the air inlet shroud is sleeved on one end of the air outlet and communicates with the air outlet, the air inlet shroud is provided with the air inlet, and the air outlet is provided on the end of the air outlet facing away from the air inlet shroud.

[0013] In one embodiment, the housing further includes an air guide ring disposed at one end of the air outlet facing the air inlet shroud and inside the air inlet shroud. The outer wall of the air guide ring is spaced apart from the end face of the air outlet, and the end of the air guide ring facing the air outlet is opposite to the outer hub. The outer wall of the air guide ring is arc-shaped; and / or, the inner diameter of the air guide ring gradually decreases along the air outlet direction.

[0014] In one embodiment, the housing further includes an air outlet grille, which is connected to the end of the air outlet tube facing away from the air inlet shroud and covers the air outlet.

[0015] In one embodiment, the housing further includes an air guide ring disposed inside the housing and between the fan blade and the air inlet. The outer wall of the air guide ring is spaced apart from the inner wall of the housing, and one end of the air guide ring facing the air outlet is opposite to the outer hub. The outer wall of the air guide ring is arc-shaped. And / or, the inner diameter of the air guide ring gradually decreases along the air outlet direction.

[0016] The technical solution of this utility model involves setting a flow guide ring on the side of the fan blade facing the air outlet. The flow guide ring divides the housing into a first flow channel and a second flow channel, allowing the first flow channel to connect with the first air chamber of the fan blade and the second flow channel to connect with the second air chamber of the fan blade. Furthermore, the flow guide ring, extending along the rotation axis of the fan blade, guides the airflow from the first and second air chambers. This facilitates adjustment of the airflow direction from the first and second air chambers, allowing the two airflows to flow better along the extension direction of the flow guide ring. This enables the two airflows generated by the fan blade's disturbance to better merge axially, effectively reducing the compression and flow restriction of the other airflow by the centrifugal airflow with higher wind pressure. This ensures the airflow force and volume of the air outlet device, achieving better airflow performance and improving the practicality and structural reliability of the air outlet device. 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 an embodiment of the air outlet device provided by this utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the air outlet device;

[0020] Figure 3 for Figure 2 Airflow direction diagram inside the air outlet device;

[0021] Figure 4 for Figure 1 An exploded view of an embodiment of the air outlet device;

[0022] Figure 5 for Figure 1 A partial structural cross-sectional view of an embodiment of the air outlet device;

[0023] Figure 6 for Figure 1 A schematic diagram of the air outlet device from another angle;

[0024] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0025] Figure 8A schematic diagram of the internal structure of an embodiment of the air outlet device provided by this utility model;

[0026] Figure 9 for Figure 8 A cross-sectional view of the air outlet device;

[0027] Figure 10 for Figure 9 The airflow direction diagram inside the air outlet device.

[0028] Explanation of icon numbers:

[0029] 100. Air outlet device; 10. Housing; 10a. Air inlet; 10b. Air outlet; 11. Air outlet duct; 12. Air guide ring; 13. Air inlet cover; 15. Air outlet grille; 17. Air guide ring; 171. First flow channel; 173. Second flow channel; 175. First guide vane; 1751. Second wire passage; 177. Second guide vane; 1771. First wire passage; 19. Fixing structure; 30. Fan assembly; 31. Fan body; 33. Fan blade; 331. Outer hub; 333. Inner hub; 335. First blade; 337. Second blade; 33a. First air chamber; 33b. Second air chamber; 50. Filter element.

[0030] 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

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In related technologies, air outlet devices such as fans and hair dryers can adopt a combined fan blade structure to achieve a better air blowing effect. However, the air pressure of the airflow generated by the centrifugal fan blades inside the combined fan blade structure is usually higher than the air pressure of the airflow generated by the axial or oblique flow fan blades on the periphery. This can easily cause the airflow generated inside the combined fan blades to compress the airflow generated outside the combined fan blades when it diffuses outward, resulting in obstruction of the airflow outside the combined fan blades. This affects the mixing effect of the two airflows inside and outside the combined fan blades and reduces the air volume of the air outlet device. To address the above problems, this utility model proposes an air outlet device 100.

[0035] Please see Figures 1 to 7 In one embodiment of this utility model, the air outlet device 100 includes a housing 10 and a fan assembly 30. The housing 10 is provided with an air inlet 10a and an air outlet 10b. The fan assembly 30 includes a fan body 31 and a fan blade 33. The fan blade 33 is rotatably disposed inside the housing 10. The fan blade 33 includes an outer hub 331, an inner hub 333, a first blade 335, and a second blade 337. The inner hub 333 is connected to the fan body 31. The outer hub 331 is sleeved on the outer periphery of the inner hub 333. The outer hub 331 and the inner wall of the housing 10 are spaced apart to form a first air cavity 33a. The outer hub 331 and the inner hub 333 are spaced apart to form a second air cavity 33b. The first blade 335 is disposed in the first air cavity 33a and connected to the outer periphery of the outer hub 331. The second blade 337 is disposed in the second air cavity 33b and connected to the outer hub 331 and the inner hub 333. The housing 10 is provided with a flow guide ring 17. The flow guide ring 17 is located on the side of the fan blade 33 facing the air outlet 10b and is close to the outer hub 331. The flow guide ring 17 extends along the rotation center axis of the fan blade 33. The flow guide ring 17 and the inner wall of the housing 10 are spaced to form a first flow channel 171. A second flow channel 173 is formed inside the flow guide ring 17. The first flow channel 171 is connected to the first air cavity 33a and the second flow channel 173 is connected to the second air cavity 33b.

[0036] In this application, the housing 10 can adopt a hollow cylindrical structure design. By setting an air inlet 10a and an air outlet 10b on the housing 10, air can enter the inner cavity of the housing 10 through the air inlet 10a, and the air is disturbed by the fan assembly 30 to form an airflow with a certain wind speed and wind pressure and flow out toward the air outlet 10b, so as to realize the stable blowing operation of the air outlet device 100.

[0037] The fan assembly 30 can be connected to the fan body 31 and the fan blades 33 via a transmission. The fan body 31 can be directly connected to drive the fan blades 33 to rotate inside the housing 10, or the fan body 31 can be indirectly driven to rotate inside the housing 10 via a transmission wheel or transmission belt. The rotation of the fan blades 33 inside the housing 10 drives the air to swirl and flow, thereby forming an airflow. The fan blade 33 may include an outer hub 331, an inner hub 333, a first blade 335, and a second blade 337. The outer hub 331 may be arranged in a ring structure with a diameter larger than that of the inner hub 333. By fitting the outer hub 331 onto the outer periphery of the inner hub 333, the outer hub 331 and the inner wall of the housing 10 can be spaced at a certain distance to form a first air cavity 33a, and the outer hub 331 and the inner hub 333 can be spaced at a certain distance to form a second air cavity 33b. Thus, the fan blade 33 can be separated into two independent channels for disturbing airflow within the housing 10, allowing the air within the housing 10 to be diverted into the first air cavity 33a and the second air cavity 33b. By placing the first blade 335 in the first air cavity 33a and connecting it to the outer circumferential surface of the outer hub 331, and placing the second blade 337 in the second air cavity 33b and connecting it to the inner wall of the outer hub 331 and the outer circumferential surface of the inner hub 333, when the fan body 31 drives the inner hub 333 to rotate, the connection of the second blade 337 enables the inner hub 333, the second blade 337, the outer hub 331, and the first blade 335 to rotate synchronously. This allows the first blade 335 to disturb the air in the first air cavity 33a to form a first airflow, and the second blade 337 to disturb the air in the second air cavity 33b to form a second airflow. The first and second airflows converge at the air outlet 10b to achieve a better airflow effect.

[0038] At this time, the first blade 335 on the fan blade 33 can adopt a blade structure of oblique flow or axial flow, and the second blade 337 can adopt a blade structure of centrifugal flow. In this way, when the fan blade 33 rotates to turbulent the air, the first blade 335 can be used to turbulent the air in the first air cavity 33a to form a high-speed oblique flow or axial flow. In the second air cavity 33b, the second blade 337 and the outer hub 331 can be used to make the airflow subject to a certain centrifugal force, so that a high-pressure centrifugal airflow can be formed in the second air cavity 33b. Then, the first airflow formed in the first air cavity 33a and the second airflow formed in the second air cavity 33b are combined and then discharged. The airflow blown by the air outlet device 100 combines the characteristics of the two airflows, effectively improving the wind force of the air outlet device 100 and achieving a better air outlet effect.

[0039] However, the centrifugal airflow, under the influence of centrifugal force in the second air chamber 33b, tends to flow close to the inner wall of the inner hub 333. When the centrifugal airflow flows out of the fan blade 33 towards the air outlet 10b, it tends to move outward, causing the flow direction of the centrifugal airflow towards the air outlet 10b to intersect with the flow direction of the airflow blown out of the first air chamber 33a. Since the air pressure of the centrifugal airflow is greater than that of the airflow blown out of the first air chamber 33a, the centrifugal airflow tends to form an air curtain at the outlet of the first air chamber 33a, which obstructs the airflow blown out of the first air chamber 33a. This obstructs the airflow from the first air chamber 33a and affects the airflow volume of the air outlet device 100.

[0040] Based on this, this application provides a flow guide ring 17 on the side of the fan blade 33 facing the air outlet 10b. The flow guide ring 17 is positioned close to the outer hub 331 of the fan blade 33 and extends along the rotation axis of the fan blade 33. This flow guide ring 17 can extend parallel to the rotation axis of the fan blade 33, or it can extend at a certain angle to the rotation axis of the fan blade 33. This flow guide ring 17 separates the space between the fan blade 33 and the air outlet 10b in the housing 10, creating a first flow channel 171 formed by a certain distance between the outer periphery of the flow guide ring 17 and the inner wall of the housing 10. The inner wall of the flow guide ring 17 encloses and forms a second flow channel 173. Because the flow guide ring 17 is positioned relatively close to the outer hub 331, the first air cavity 33a and the first flow channel 171 are linearly connected, and the second air cavity 33b and the second flow channel 173 are linearly connected, allowing the airflow formed in the first air cavity 33a to enter the first flow channel. The airflow 171 flows towards the air outlet 10b, allowing the airflow formed in the second air chamber 33b to enter the second flow channel 173 and flow towards the air outlet 10b. Furthermore, the guide ring 17 can guide the airflow blown out of the first air chamber 33a and the second air chamber 33b, so that the airflow entering the first flow channel 171 can flow stably along the extension direction of the guide ring 17, and the centrifugal airflow entering the second flow channel 173 can be guided by the guide ring 17 and flow along the extension direction of the guide ring 17. Thus, the two airflows formed by the disturbance of the fan blade 33 can be corrected by the guide ring 17 to have their airflow direction corrected, so that the two airflows are blown out and merged from the air outlet 10b along the extension direction of the guide ring 17. This effectively avoids the centrifugal airflow with higher wind pressure squeezing and obstructing the airflow formed by the first blade 335, so that the two airflows can better merge and blow air at the air outlet 10b, ensuring the airflow volume and wind force of the air outlet device 100, and improving the practicality and structural reliability of the air outlet device 100.

[0041] The technical solution of this utility model involves setting a flow guide ring 17 on the side of the fan blade 33 facing the air outlet 10b. The flow guide ring 17 divides the housing 10 to form a first flow channel 171 and a second flow channel 173. This allows the first flow channel 171 to connect with the first air chamber 33a of the fan blade 33, and the second flow channel 173 to connect with the second air chamber 33b of the fan blade 33. Furthermore, the flow guide ring 17, extending along the rotation axis of the fan blade 33, can guide the airflow from the first air chamber 33a and the second air chamber 33b. The airflow guide helps to adjust the direction of the airflow from the first air chamber 33a and the second air chamber 33b, so that the two airflows can flow better along the extension direction of the guide ring 17. This allows the two airflows formed by the disturbance of the fan blades 33 to better merge along the axial direction, effectively reducing the compression and flow restriction of the other airflow by the centrifugal airflow with higher wind pressure, ensuring the airflow force and volume of the air outlet device 100, achieving better air outlet effect, and improving the practicality and structural reliability of the air outlet device 100.

[0042] See Figure 2 , Figure 5 and Figure 7 In one embodiment of the present invention, the flow guide ring 17 is provided with a first guide vane 175, which is disposed in the first flow channel 171 and connects the outer wall of the flow guide ring 17 and the inner wall of the housing 10.

[0043] In this embodiment, by providing a first guide vane 175 on the outer periphery of the flow guide ring 17, the first guide vane 175 can be used to connect the outer wall of the flow guide ring 17 and the inner wall of the housing 10 within the first flow channel 171. This facilitates the use of the first guide vane 175 to support and fix the flow guide ring 17 inside the housing 10, ensuring the stable guiding effect of the flow guide ring 17 on the airflow within the housing 10, further improving the overall structural stability and reliability of the air outlet device 100, and ensuring the stable operation of the air outlet device 100.

[0044] The first guide vane 175 can be integrally formed with the drainage ring 17 and the housing 10, or the first guide vane 175 can be installed and fixed to the drainage ring 17 and the housing 10 using fasteners such as screws. This application does not limit the connection and assembly method between the first guide vane 175 and the drainage ring 17 and the housing 10, as long as the first guide vane 175 and the drainage ring 17 are stably installed within the housing 10. The number of first guide vanes 175 can be two, three, four, five, six, etc. Multiple first guide vanes 175 can be arranged at intervals around the outer periphery of the drainage ring 17, which is beneficial to further improve the installation stability and reliability of the drainage ring 17 under the support of a certain number of first guide vanes 175. This application does not limit the number of first guide vanes 175, as long as it can meet the stable support function for the drainage ring 17.

[0045] See Figure 2 , Figure 5 and Figure 7 In one embodiment of the present invention, a fixing structure 19 is also provided inside the housing 10. The fixing structure 19 is located on the side of the fan blade 33 facing the air outlet 10b. The fan body 31 is installed on the fixing structure 19. The flow guide ring 17 is sleeved on the outer periphery of the fixing structure 19. The inner wall of the flow guide ring 17 and the outer wall of the fixing structure 19 are spaced apart to form a second flow channel 173.

[0046] In this embodiment, a fixing structure 19 can be provided between the fan blade 33 and the air outlet 10b in the housing 10. The fixing structure 19 can be used to install the fan body 31. At this time, a groove can be provided on the side of the fixing structure 19 facing away from the fan blade 33, and a through hole can be provided at the bottom of the groove so that the fan body 31 can be accommodated in the groove and the shaft of the fan body 31 can pass through the through hole to connect to the fan blade 33. Alternatively, the fan body 31 can be installed on the side of the fixing structure 19 facing the fan blade 33 and directly connected to the fan blade 33 to ensure the stable drive of the fan body 31 to the fan blade 33. By using the fixed structure 19 to house the fan body 31, the overall structure of the air outlet device 100 can be made more compact. At this time, the cross-sectional area of ​​the fixed structure 19 can be set smaller than the cross-sectional area of ​​the second air cavity 33b. By fitting the guide ring 17 around the outer periphery of the fixed structure 19, and making the inner wall of the guide ring 17 and the outer periphery of the fixed structure 19 a certain distance apart to form the second flow channel 173, the airflow formed in the second air cavity 33b can flow stably through the fixed structure 19 and into the second flow channel 173, ensuring the stable airflow of the air outlet device 100 and further improving the practicality and structural reliability of the air outlet device 100.

[0047] See Figure 2 , Figure 5 and Figure 7 In one embodiment of the present invention, the flow guide ring 17 is provided with a second guide vane 177, which is disposed in the second flow channel 173 and connects the inner wall of the flow guide ring 17 and the outer wall of the fixing structure 19.

[0048] In this embodiment, a second guide vane 177 can be provided in the second flow channel 173 of the flow guide ring 17. The second guide vane 177 connects the inner wall of the flow guide ring 17 and the outer periphery of the fixed structure 19. Under the action of the second guide vane 177, the flow guide ring 17 and the fixed structure 19 can be connected into a whole, which is beneficial to better maintain the distance between the inner wall of the flow guide ring 17 and the outer wall of the fixed structure 19, so that the flow guide ring 17 and the fixed structure 19 can be stably spaced to form the second flow channel 173, ensuring the stable blowing operation of the air outlet device 100.

[0049] At this time, the housing 10 can use the first guide vane 175 to connect the inner wall of the housing 10 and the outer periphery of the flow ring 17 within the first flow channel 171, so that the flow ring 17 and the fixed structure 19 can be better stably installed within the housing 10 under the support of the first guide vane 175 and the second guide vane 177; or, a support guide vane can be provided on the outer wall of the fixed structure 19 to connect the inner wall of the housing 10, so that the flow ring 17 and the fixed structure 19 can be better stably installed within the housing 10 under the support of the support guide vane and the second guide vane 177, further improving the overall structural stability and reliability of the air outlet device 100.

[0050] The second guide vane 177 can be integrally formed with the drainage ring 17 and the fixing structure 19, or the second guide vane 177 can be installed and fixed to the drainage ring 17 and the fixing structure 19 using fasteners such as screws or bolts. This application does not limit the connection and assembly method between the second guide vane 177 and the drainage ring 17 and the fixing structure 19, as long as the second guide vane 177 can be stably connected to the drainage ring 17 and the fixing structure 19. The number of second guide vanes 177 can be two, three, four, five, six, etc. Multiple second guide vanes 177 can be arranged at intervals around the outer periphery of the drainage ring 17, which is beneficial to further improve the connection stability and reliability of the drainage ring 17 and the fixing structure 19 under the support of a certain number of second guide vanes 177. This application does not limit the number of second guide vanes 177, as long as it can meet the stable connection function between the drainage ring 17 and the fixing structure 19.

[0051] See Figure 7 In one embodiment of the present invention, the second guide vane 177 is provided with a first wire passage 1771, and the two ends of the first wire passage 1771 respectively pass through the fixing structure 19 and the flow guide ring 17; the flow guide ring 17 is also provided with a first guide vane 175 connecting the outer wall of the flow guide ring 17 and the inner wall of the housing 10, and the first guide vane 175 is provided with a second wire passage 1751, and the two ends of the second wire passage 1751 respectively pass through the flow guide ring 17 and the housing 10.

[0052] Understandably, the fan assembly 30 can be connected to the fan body 31 by wires, which can send control signals and supply power to the fan body 31 to ensure the stable operation of the fan assembly 30; or, a control circuit board can be installed on the fan body 31, and the control circuit board can be used to run at least part of the control program for the fan body 31. In this case, the fan assembly 30 can be connected to the control circuit board by wires, and the control circuit board can be connected to the fan body 31, so that power can be supplied to the control circuit board and the fan body 31 and signals can be transmitted through the wires.

[0053] By mounting the fan body 31 onto the fixed structure 19, the wires of the fan assembly 30 can be routed from the fixed structure 19 to the outside of the housing 10, ensuring stable power supply to the air outlet device 100. At this time, by providing a first wire passage 1771 on the second guide vane 177, with both ends of the first wire passage 1771 passing through the fixed structure 19 and the guide ring 17 respectively, the wires on the fan assembly 30 can enter the first wire passage 1771 from the fixed structure 19 and pass through the guide ring 17. When a first guide vane 175 is also provided on the outer periphery of the guide ring 17 to connect to the housing 10, a second wire passage 1751 can be provided inside the first guide vane 175, passing through the guide ring 17 and the housing 10. This allows the wires passing through the guide ring 17 to be routed through the second wire passage 1751 to the outside of the housing 10, ensuring stable power supply to the air outlet device 100. By setting wiring channels in the second guide vane 177 and the first guide vane 175 for the wiring of the fan assembly 30, the first guide vane 175 and the second guide vane 177 can be used to better protect the wiring, reducing the chance of the wiring coming loose due to the airflow disturbing the wiring, and further improving the overall structural stability and reliability of the air outlet device 100.

[0054] See Figure 2 , Figure 4 and Figure 5 In one embodiment of this utility model, the side of the fixing structure 19 facing the fan blade 33 is arranged in an arc shape.

[0055] In this embodiment, the fixing structure 19 can adopt a structure similar to a cylinder. The outer diameter of the fixing structure 19 can gradually increase along the rotation center axis of the fan blade 33 toward the air outlet 10b, so that the side of the fixing structure 19 facing the fan blade 33 can be set in an arc shape. Therefore, under the action of the smooth arc surface, the obstruction effect of the fixing structure 19 on the airflow formed in the second air cavity 33b can be effectively reduced, so that the airflow can flow better along the arc surface formed by the fixing structure 19, better reduce the airflow loss of the air outlet device 100, and further improve the blowing effect of the air outlet device 100.

[0056] See Figure 2 and Figure 5 In one embodiment of the present invention, the inner diameter of the outer hub 331 is configured to gradually increase in the direction toward the air outlet 10b.

[0057] In this embodiment, the fan blade 33 can be configured such that the inner diameter of the outer hub 331 gradually increases in the direction toward the air outlet 10b, that is, the outer hub 331 can be configured with a trumpet-shaped structure. When air enters the second air cavity 33b formed by the gap between the outer hub 331 and the inner hub 333, the airflow formed by the disturbance of the second blade 337 can be subjected to the centrifugal force of the second blade 337, so that the airflow flows close to the inner wall of the outer hub 331 under the action of centrifugal force. At this time, the gradually expanding outer hub 331 can facilitate the airflow to flow more smoothly toward the air outlet 10b, avoid the airflow from stagnating in the second air cavity 33b, reduce the wind power loss of the airflow, and achieve a better blowing effect of the air outlet device 100.

[0058] See Figures 2 to 4 In one embodiment of the present invention, the housing 10 includes an air outlet duct 11 and an air inlet hood 13. A flow guide ring 17 is disposed inside the air outlet duct 11. The air inlet hood 13 is sleeved on one end of the air outlet duct 11 and communicates with the air outlet duct 11. The air inlet hood 13 is provided with an air inlet 10a, and the end of the air outlet duct 11 facing away from the air inlet hood 13 is provided with an air outlet 10b.

[0059] In this embodiment, the housing 10 utilizes the hollow air outlet duct 11 structure to form a space for accommodating the fan assembly 30, thereby protecting the fan assembly 30 and ensuring the stable operation of the air outlet device 100. By connecting an air inlet hood 13 to one end of the air outlet duct 11 and forming an air outlet 10b at the other end, a smoother airflow structure design can be achieved for the housing 10. The air inlet hood 13 can be constructed using a mesh or grille structure, allowing air to enter the air outlet duct 11 through the openings in the air inlet hood 13, ensuring stable air intake for the air outlet device 100. With the air inlet hood 13 in place, the housing 10 can have a larger air intake area while effectively preventing large foreign objects from entering the air outlet duct 11 and colliding with the fan blades 33, preventing damage to the fan blades 33. It also prevents users from accidentally touching the fan blades 33 during operation of the air outlet device 100, thus providing better protection for the fan assembly 30 and further improving the practicality and structural reliability of the air outlet device 100.

[0060] See Figures 2 to 4 In one embodiment of the present invention, the air outlet device 100 further includes a filter element 50, which is disposed inside the air inlet hood 13 and is provided corresponding to the air inlet 10a.

[0061] In this embodiment, by providing a filter element 50 at the position corresponding to the air inlet 10a inside the air inlet shroud 13, the air flowing through the air inlet 10a of the air inlet shroud 13 can pass through the filter element 50 before flowing into the air outlet duct 11. This facilitates the filtration of dust, small stones, and other foreign objects in the air by the filter element 50, effectively reducing the adhesion of foreign objects to the air outlet assembly, thereby reducing the need for disassembly, cleaning, and maintenance of the air outlet assembly. Furthermore, by using the filter element 50 to filter the air entering the air outlet duct 11, the airflow blown out by the air outlet device 100 can be made purer, effectively reducing the foreign objects carried in the airflow, so that the air outlet device 100 can achieve a certain clean air blowing effect, effectively enriching the functionality of the air outlet device 100 and further improving the practicality and reliability of the air outlet device 100. The filter element 50 may include, but is not limited to, filter cotton, filter screen, filter, etc. The filter element 50 may be connected to the air inlet cover 13 by a detachable structure such as screws or clips, so that the air outlet device 100 can remove the filter element 50 for cleaning and maintenance more conveniently, so as to achieve better continuous operation of the air outlet device 100.

[0062] See Figures 8 to 10 In one embodiment of this utility model, the housing 10 further includes an air guide ring 12, which is disposed inside the housing 10 and between the fan blade 33 and the air inlet 10a. The outer wall of the air guide ring 12 is spaced apart from the inner wall of the housing 10, and the end of the air guide ring 12 facing the air outlet 10b is opposite to the outer hub 331. The outer wall of the air guide ring 12 is arc-shaped; and / or, the inner diameter of the air guide ring 12 gradually decreases along the air outlet direction.

[0063] In this embodiment, by setting an air guide ring 12 inside the housing 10, and placing the air guide ring 12 between the fan blade 33 and the air inlet 10a, the air guide ring 12 can be used to divert and guide the airflow from the air inlet 10a to the air outlet 11, ensuring that the airflow can stably flow into the first air chamber 33a and the second air chamber 33b, thereby achieving a better blowing effect for the air outlet device 100. The air guide ring 12 can be a ring-shaped structure with a certain length along the air outlet direction. By maintaining a certain distance between the outer wall of the air guide ring 12 and the inner wall of the housing 10, and by setting the end face of the air guide ring 12 facing the air outlet 10b opposite to the outer hub 331 of the fan blade 33, the air guide ring 12 can be used to divert the airflow from the air inlet 10a to the fan blade 33. This allows some airflow to flow into the first air chamber 33a through the gap between the outer wall of the air guide ring 12 and the end face of the air outlet 11, while the other part of the airflow is better guided into the second air chamber 33b through the inner ring of the air guide ring 12. This ensures that a certain amount of airflow flows into both the first air chamber 33a and the second air chamber 33b, effectively reducing the airflow difference between the two air chambers. This allows the air outlet device 100 to achieve a better combined airflow effect using the fan blade 33, further improving the practicality and reliability of the air outlet device 100. When the air outlet duct 11 is provided inside the housing 10 to house the fan assembly 30, the air guide ring 12 can be set at the air inlet end of the air outlet duct 11, and the outer wall of the air guide ring 12 is spaced apart from the end face of the air outlet duct 11 to ensure the air guiding and diversion function of the air guide ring 12.

[0064] The guide ring 12 can have an arc-shaped surface design on its outer wall. This design allows airflow to pass through the gap between the outer wall of the guide ring 12 and the end face of the outlet duct 11 and flow into the outlet duct 11. The arc-shaped outer wall of the guide ring 12 facilitates a smoother flow transition, reducing the obstruction of the airflow and effectively reducing airflow loss during intake. This, in turn, improves the airflow output of the outlet device 100. Furthermore, when the housing 10 is equipped with an air inlet shroud 13 forming an air inlet 10a, the arc-shaped outer wall of the guide ring 12, by surrounding the air inlet shroud 13, further enhances the airflow guidance, allowing the airflow to flow more smoothly into the outlet duct 11 and further reducing airflow loss.

[0065] Furthermore, the air guide ring 12 can also adopt a structure design where the inner diameter gradually decreases along the air outlet direction. This allows the inner wall of the air guide ring 12 to have a sloping or arc-shaped surface design, which facilitates a smoother flow transition when the airflow passes through the inner ring of the air guide ring 12 into the air outlet duct 11. This reduces the obstruction effect of the air guide ring 12 on the airflow, thereby effectively reducing the airflow loss during air intake. The gradually decreasing inner ring of the air guide ring 12 can also achieve an airflow convergence effect, allowing the airflow to flow more smoothly into the air outlet duct 11, thus improving the airflow force of the air outlet device 100. Simultaneously, when the air inlet 10a is arranged around the periphery of the air inlet shroud 13, the use of an air guide ring with a gradually decreasing inner diameter along the air outlet direction further facilitates the formation of an inclined or arc-shaped inner wall of the air guide ring 12, providing better airflow guidance and allowing the airflow to flow more smoothly into the air outlet duct 11, further reducing airflow loss.

[0066] See Figure 2 and Figure 4 In one embodiment of the present invention, the air inlet 10a is disposed around the periphery of the air inlet cover 13.

[0067] In this embodiment, the air inlet shroud 13 can adopt a sleeve-like structure. By circumferentially arranging the air inlet 10a around the periphery of the air inlet shroud 13, the air inlet shroud 13 can have a larger air intake area, which is beneficial to better increase the air volume of the air outlet device 100, achieving a better air blowing effect. At the same time, the air outlet device 100 can achieve a large air volume blowing effect with a smaller width, further improving the portability of the air outlet device 100, and further improving the practicality and structural reliability of the air outlet device 100. It should be noted that the air inlet 10a can be arranged around the outer periphery of the air inlet shroud 13, or the air inlet 10a can be arranged around a portion of the outer periphery of the air inlet shroud 13. The area of ​​the air inlet 10a can be adjusted according to the required air intake area of ​​the air inlet device and the arrangement of components on the housing 10.

[0068] When the filter element 50 is installed in the air inlet hood 13 to filter the incoming air, the filter element 50 can be arranged in a ring structure so that the filter element 50 can better match the arrangement of the air inlet 10a, ensuring that the air can be stably filtered by the filter element 50 before entering the air outlet duct 11 to form an outflow, thereby achieving a better blowing effect of the air outlet device 100 and further improving the structural stability and reliability of the air outlet device 100.

[0069] See Figure 2 and Figure 4 In one embodiment of the present invention, the housing 10 further includes an air outlet grille 15, which is connected to the end of the air outlet duct 11 facing away from the air inlet cover 13 and covers the air outlet 10b.

[0070] In this embodiment, by covering the air inlet 10a of the air outlet duct 11 with an air inlet grille, the housing 10 can provide better overall protection for the fan assembly 30, effectively reducing the entry of large foreign objects into the air outlet duct 11 and preventing damage to the fan assembly 30. Simultaneously, the air outlet grille 15 effectively prevents users from accidentally touching the fan blades 33 during operation of the air outlet device 100, ensuring stable operation of the air outlet device 100 and further improving its practicality and structural reliability.

[0071] The air outlet grille 15 can be attached to the air outlet duct 11 using clips or pins, or it can be fastened to the air outlet duct 11 using screws or other fasteners, so that the air outlet grille 15 can be easily removed and installed on the air outlet duct 11 for maintenance. Of course, the air outlet grille 15 can also be connected and installed to the air outlet duct 11 in other ways. This application does not limit this, as long as a stable connection between the air outlet grille 15 and the air outlet duct 11 can be achieved.

[0072] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An air outlet device, characterized by include: The housing is provided with an air inlet and an air outlet; and A fan assembly includes a fan body and fan blades. The fan blades are rotatably disposed within the housing. Each fan blade includes an outer hub, an inner hub, a first blade, and a second blade. The inner hub is drivenly connected to the fan body. The outer hub is sleeved on the outer periphery of the inner hub. The outer hub and the inner wall of the housing are spaced apart to form a first air cavity. The outer hub and the inner hub are spaced apart to form a second air cavity. The first blade is disposed in the first air cavity and connected to the outer periphery of the outer hub. The second blade is disposed in the second air cavity and connected to the outer hub and the inner hub. The housing is provided with a flow guide ring, which is located on the side of the fan blade facing the air outlet and close to the outer hub. The flow guide ring extends along the rotation center axis of the fan blade. The flow guide ring and the inner wall of the housing form a first flow channel. A second flow channel is formed within the flow guide ring. The first flow channel is connected to the first air cavity, and the second flow channel is connected to the second air cavity.

2. The air outlet device of claim 1, wherein, The flow guide ring is provided with a first guide vane, which is located in the first flow channel and connects the outer wall of the flow guide ring and the inner wall of the shell.

3. The air outlet device of claim 1, wherein, The housing also includes a fixing structure located on the side of the fan blade facing the air outlet. The fan body is mounted on the fixing structure, and the flow guide ring is fitted around the outer periphery of the fixing structure. The inner wall of the flow guide ring and the outer wall of the fixing structure are spaced apart to form the second flow channel.

4. The air outlet device of claim 3, wherein The flow guide ring is provided with a second guide vane, which is located in the second flow channel and connects the inner wall of the flow guide ring and the outer wall of the fixed structure.

5. The air outlet device of claim 4, wherein, The second guide vane is provided with a first wire passage, and the two ends of the first wire passage pass through the fixing structure and the flow guide ring, respectively; The drainage ring is further provided with a first guide vane connecting the outer wall of the drainage ring and the inner wall of the housing. The first guide vane is provided with a second wire passage, and the two ends of the second wire passage pass through the drainage ring and the housing, respectively.

6. The air outlet device of claim 3, wherein The side of the fixing structure facing the fan blade is arranged in an arc shape.

7. The air outlet device according to any one of claims 1 to 6, wherein The inner diameter of the outer hub is configured to gradually increase in the direction toward the air outlet.

8. The air outlet device as described in any one of claims 1 to 6, characterized in that, The housing includes an air outlet and an air inlet shroud. The air guide ring is disposed inside the air outlet. The air inlet shroud is sleeved on one end of the air outlet and communicates with the air outlet. The air inlet shroud has the air inlet. The air outlet is disposed on the end of the air outlet that is opposite to the air inlet shroud.

9. The air outlet device of claim 8, wherein, The air outlet device also includes a filter element, which is disposed inside the air inlet hood and is positioned corresponding to the air inlet. And / or, the air inlet is disposed around the periphery of the air inlet shroud; And / or, the housing further includes an air outlet grille, which is connected to one end of the air outlet tube opposite to the air inlet shroud and covers the air outlet.

10. The air outlet device of claim 1, wherein, The housing also includes an air guide ring, which is disposed inside the housing and between the fan blade and the air inlet. The outer wall of the air guide ring is spaced apart from the inner wall of the housing, and the end of the air guide ring facing the air outlet is opposite to the outer hub. The outer wall of the air guide ring is arc-shaped; and / or, the inner diameter of the air guide ring gradually decreases along the air outlet direction.

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