Blowing device

Abstract

The utility model discloses an air blowing device, which comprises an air outlet cylinder, an air inlet, an air outlet, an air inlet pipe and an air outlet pipe, and is characterized in that two ends of the air outlet cylinder are respectively provided with an air inlet; the fan assembly is arranged in the air outlet barrel and close to the air inlet, and the fan assembly is provided with a first central axis; the heating component is arranged in the air outlet barrel and close to the air outlet, the heating component is provided with a second central axis, and the second central axis is offset relative to the first central axis; a mounting space is formed between the fan assembly and the heating part, a flow guide structure is arranged in the mounting space, the flow guide structure comprises a flow guide surface, and the flow guide surface is used for guiding passing airflow to face the heating part and changing the flowing direction. The installation space is formed between the fan assembly and the heating component which are eccentrically arranged, the flow guide structure is arranged in the installation space, the flow guide face is used for distributing airflow, and therefore the better air outlet effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to a hair dryer. Background Technology

[0002] Hair dryers, as everyday household appliances, are widely used for daily hair drying and styling. With increasing demand for portability and efficient hair drying, hair dryers with high-speed drying capabilities are gaining popularity in the market. However, to maintain high drying efficiency in a compact and lightweight hair dryer, careful design of its internal structure is essential. This includes the arrangement of the motor and heating elements, the shape and direction of the air duct, and heat dissipation of internal components, among other aspects, to balance performance and reliability within a limited space.

[0003] Improvements in high-speed hair dryers have largely focused on the folding mechanism of the handle or the connection method of accessories. While these improvements have enhanced the portability of hair dryers to some extent, they still generally suffer from the following shortcomings: the motor and heating components are often eccentrically arranged, resulting in uneven airflow distribution, which affects the drying efficiency and comfort of the hair dryer. Utility Model Content

[0004] The purpose of this invention is to provide a blower that can improve airflow and enhance customer experience.

[0005] To achieve the above-mentioned utility model objectives, one embodiment of this utility model provides a blower device, comprising:

[0006] An air outlet duct, wherein an air inlet and an air outlet are respectively provided at both ends;

[0007] A fan assembly is disposed inside the air outlet and adjacent to the air inlet, and the fan assembly has a first central axis.

[0008] A heating element is disposed inside the air outlet and near the air outlet, and the heating element has a second central axis, which is offset relative to the first central axis.

[0009] An installation space is formed between the fan assembly and the heating component. A flow guiding structure is provided in the installation space. The flow guiding structure includes a flow guiding surface, which is used to guide the passing airflow toward the heating component and change the flow direction.

[0010] By creating an installation space between the eccentrically arranged fan assembly and the heating element, and setting a guide structure within this installation space, the airflow changes direction as it passes through the guide surface and moves toward the heating element, thus distributing the airflow and achieving a better blowing effect.

[0011] As a further improvement of this utility model, the guide surface has a starting end and an ending end along the air outlet direction; along the direction from the first central axis to the second central axis, the ending end is offset relative to the starting end.

[0012] The airflow guide surface can precisely direct the airflow to the area below the heating element, thereby achieving uniform airflow distribution in a miniaturized, high-speed blower.

[0013] As a further improvement of this utility model, the flow guiding structure includes a flow guiding plate, the flow guiding surface is disposed on the flow guiding plate, and the first central axis passes through the flow guiding plate.

[0014] The first central axis runs through the guide plate, which allows the airflow from the fan assembly to directly impact the guide surface. This facilitates the constraint and guidance of the airflow entering the air outlet through the guide surface, thereby improving airflow distribution efficiency and overall compactness.

[0015] As a further improvement of this utility model, along the direction from the first central axis to the second central axis, the starting end is located on the side of the first central axis away from the second central axis, and the ending end is located between the first central axis and the second central axis.

[0016] By setting the relative positions of the starting and ending points in this way, the airflow in the main channel that is far from the heating element can be gradually guided to the eccentric area where the heating element is located when the blower is working. This allows the airflow to be more fully distributed in the part close to the heating element, resulting in a more uniform temperature and airflow distribution in the final output air.

[0017] As a further improvement of this utility model, the air outlet duct includes a first inner wall defining the installation space, and an opening is provided between the starting end and the first inner wall; along the direction from the first central axis to the second central axis, the distance from the starting end to the first inner wall is less than the distance from the starting end to the second central axis, and / or the distance from the starting end to the first inner wall is greater than the distance from the starting end to the first central axis.

[0018] By setting this opening between the starting end and the inner wall, and controlling the relative position of the opening with respect to the first and second central axes, a more flexible flow channel can be obtained when the high-speed airflow flows from the main channel to the eccentrically arranged heating component area, avoiding unnecessary eddies or dead zones in the narrow space. At the same time, the opening allows some airflow to directly enter the vicinity of the heating component via a relatively short path, enhancing the effect of balanced air outlet temperature and air volume. Combined with the existing eccentric layout and flow guide surface design, it further improves heat dissipation efficiency and blowing performance.

[0019] As a further improvement of this utility model, along the direction from the first central axis to the second central axis, the straight direction from the starting end to the ending end forms a first acute angle with the first central axis, the air guiding direction at the starting end of the guide surface forms a second acute angle with the first central axis, and the air guiding direction at the ending end of the guide surface forms a third acute angle with the first central axis, wherein the first acute angle is greater than the third acute angle or the second acute angle is greater than the third acute angle.

[0020] By forming a large deflection angle at the front end of the guide surface, the airflow is rapidly deflected when it enters the initial area of ​​the guide surface, and then a smaller angle is used at the end area, so that the airflow is guided more smoothly. This helps to reduce local turbulence or impact loss within the compact air duct structure, further improving the uniform coverage of the airflow on the heating components, thus balancing the airflow volume of high-speed blowing with the comfort of hair drying.

[0021] As a further improvement of this utility model, the flow guiding structure includes a flow guiding plate, the flow guiding surface is disposed on the flow guiding plate, the flow guiding surface also has two side ends adjacent to the starting end and the ending end respectively, the flow guiding plate also includes an auxiliary guiding surface, the auxiliary guiding surface bends from the two side ends and extends in a direction away from the second central axis.

[0022] Because auxiliary guiding surfaces are formed at both ends of the baffle, and these surfaces extend outward relative to the second central axis, the lateral diffusion of the airflow can be further restricted, making the airflow entering the heating component area more concentrated and stable. Furthermore, the eccentric layout structure minimizes the occurrence of turbulence or air leakage on both sides of the duct.

[0023] As a further improvement of this utility model, the air outlet includes a first inner wall, the first inner wall is concentrically arranged with the heating component, the heating component is installed on the first inner wall, the first inner wall defines the installation space, and the two free ends of the guide plate with the auxiliary guiding surface respectively abut against the first inner wall.

[0024] By abutting the free end of the auxiliary guide surface against the inner wall of the first cylinder, turbulence or air leakage caused by airflow passing through the side gap can be further reduced in a high-speed airflow environment. This allows the concentric relationship between the guide structure and the fan assembly to be more closely maintained in the eccentric layout. This not only enables the airflow to be fully constrained and effectively distributed in the guide surface area, but also allows the guide plate to obtain a more stable fixed position, thus achieving a compact layout of the internal structure of the miniaturized blower and stable high-speed operation.

[0025] As a further improvement of this utility model, the guide surface shall at least satisfy one of the following characteristics:

[0026] The guide surface is configured to extend at a preset angle relative to the first central axis from the starting end to the ending end.

[0027] The guide surface is configured to extend in a streamlined shape from the starting end to the ending end;

[0028] The guide surface is configured to extend in an arc shape from the starting end to the ending end;

[0029] The guide surface is configured to extend in a wavy shape from the starting end to the ending end.

[0030] Due to the limited available space inside the air duct, using guide surfaces of different shapes can achieve a delicate airflow guiding effect without significantly increasing wind resistance. For example, streamlined or curved surfaces can make the airflow entering the eccentric area smoother and further reduce noise. If a wave-shaped design is chosen, the contact area between the airflow and the guide surface can be increased in a limited space, which helps to distribute the airflow and dissipate heat, thereby maintaining more flexible and efficient airflow control in the overall miniaturized blower.

[0031] As a further improvement of this utility model, the flow guiding structure includes a flow guiding plate, the flow guiding surface is disposed on the flow guiding plate, the air outlet is provided with a fixing rib extending toward the flow guiding plate, the flow guiding plate is provided with an installation groove, and the fixing rib extends into the installation groove and connects with the flow guiding plate.

[0032] By using fixing ribs and mounting grooves between the guide plate and the air duct, the guide plate can maintain a stable position even under high-speed airflow. This facilitates quick assembly and effectively prevents the guide plate from loosening or shifting during operation, thereby further improving structural reliability and service life in the high-wind-speed environment of miniaturized blowers.

[0033] As a further improvement of this utility model, a circuit board is also provided in the installation space, and the circuit board is arranged along the airflow direction; along the direction from the first central axis to the second central axis, the guide surface and the circuit board are respectively located on both sides of the second central axis; the circuit board has a front edge adjacent to the heating component, and the airflow direction of the end of the guide surface or the straight line direction from the starting end to the end passes over the front edge.

[0034] By cleverly arranging the circuit board within this installation space, airflow from the fan assembly can pass over the circuit board surface along the airflow direction for cooling. Utilizing the airflow passing through this installation space to dissipate heat from the circuit board and other components effectively alleviates the heat dissipation problem caused by the reduced size due to folding, achieving a balance between miniaturized layout and high-efficiency drying performance. Furthermore, the eccentric airflow guidance structure, where the end of the guide surface extends beyond the front edge of the circuit board, directs some airflow to the area below the heating element without passing over the circuit board. This ensures a balanced distribution of heat dissipation requirements for the circuit board and outlet air temperature within a high-speed, miniaturized structure, further improving the overall heat dissipation efficiency and reliability of the blower.

[0035] As a further improvement of this utility model, the air outlet duct includes a first inner wall and a second inner wall arranged sequentially. The first inner wall is concentrically arranged with the heating component, and the heating component is installed on the first inner wall. The second inner wall is concentrically arranged with the fan assembly, and the fan assembly is installed on the second inner wall. The first inner wall is provided with a rib extending radially inward along the air outlet duct. The installation space is defined between the second inner wall and the rib. A circuit board is also provided in the installation space. Along the direction from the first central axis to the second central axis, the projection of the guide surface is located within the projection of the circuit board. The circuit board has a front edge adjacent to the heating component and a rear edge opposite to it. Along the air outlet direction, the distance from the starting end to the rear edge is greater than the distance from the end end to the front edge.

[0036] By employing a structure where the heating element on the inner wall of the first cylinder is concentrically arranged, and the inner wall of the second cylinder is concentrically arranged with the fan assembly, the fan assembly and heating element can be precisely installed in an overall eccentric layout. Furthermore, the use of ribs extending radially inward from the outlet cylinder defines a compact space for the circuit board, ensuring reliable fixation and adequate airflow cooling. When the guide surface overlaps with the projection of the circuit board and satisfies the condition that the distance from the starting end to the rear edge is greater than the distance from the end end to the front edge, the airflow can maintain a more stable and efficient direction in the eccentric region, reducing turbulence and the risk of localized overheating. This further enhances the heat dissipation and airflow distribution effect of the blower under miniaturized, high-speed operation conditions.

[0037] By first placing sound-absorbing cotton at the air inlet of the grille cover, operating noise can be effectively reduced in the initial stage when high-speed airflow enters the air outlet. This also provides initial guidance and interception of the airflow entering the air outlet, preventing hair or debris from being sucked into the fan assembly area. The honeycomb mesh set behind the sound-absorbing cotton along the airflow direction further evenly distributes the airflow, reduces airflow turbulence, and continues to achieve noise reduction. This, combined with the aforementioned eccentric layout and airflow guiding structure, creates a relatively stable and quiet airflow environment inside the miniaturized blower, while simultaneously improving overall safety and comfort.

[0038] As a further improvement of this utility model, the air outlet includes a cylinder body and a grille back cover connected to the cylinder body. The air inlet is disposed on the grille back cover. Sound-absorbing cotton and honeycomb mesh are provided between the cylinder body and the grille back cover. The sound-absorbing cotton and honeycomb mesh are arranged sequentially along the air inlet direction.

[0039] As a further improvement of this utility model, the air outlet includes a cylinder body and an air outlet cover connected to the cylinder body. The air outlet is disposed on the air outlet cover. An installation gap is formed between the circumferential surface of the air outlet cover and the cylinder body. A connecting groove is provided on the circumferential surface of the air outlet cover. The connecting groove passes through the air outlet end face of the air outlet cover and is L-shaped. The connecting groove is used to guide the accessory to be inserted into the connecting groove in the air inlet direction and can rotate relative to the air outlet along the connecting groove.

[0040] By arranging L-shaped connecting grooves on the circumference of the air outlet cover, corresponding protrusions on the accessory can be designed to mate with the connecting grooves. After aligning the accessory with the air inlet direction and inserting it, the user can rotate it at a certain angle along the L-shaped connecting groove to achieve a secure assembly; a portion of the accessory's edge can remain within the installation gap. During high-speed blowing or multi-angle use, the accessory is less likely to loosen or slip off, effectively improving the ease of use and safety of the miniaturized blower and meeting diverse design requirements. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the blower device in one embodiment of this utility model.

[0042] Figure 2 yes Figure 1 3D exploded view of the blower device.

[0043] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the air guide structure of the blower.

[0044] Figure 4 yes Figure 1 Schematic diagram of the cross section along line AA.

[0045] Figure 5 yes Figure 1 Schematic diagram of the cross section of the BB line.

[0046] Figure 6 yes Figure 5 Cross-sectional view of the CC line.

[0047] Explanation of icon numbers:

[0048] 100. Blowing device; 20. Air outlet; 30. Fan assembly; 40. Heating component; 50. Handle; 201. Installation space; 211. Air inlet; 212. Air outlet; 60. Guide structure; 611. Guide surface; 612. Starting end; 613. End; 61. Guide plate; 221. Inner wall of the first cylinder; 202. Opening; 615. Side end; 616. Auxiliary guide surface; 618. Free end; 23. Fixing rib; 63. Mounting groove; 231. Column; 232. Side wing; 25. Fixing component; 70. Circuit board; 71. Front edge; 72. Rear edge; 21. Cylinder body; 26. Grille back cover; 261. Sound-absorbing cotton; 262. Honeycomb mesh; 27. Air outlet cover; 271. Installation gap; 272. Connecting groove; Detailed Implementation

[0049] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0050] It should be noted that the terms "first" and "second" in the specification and claims of this utility model are used to distinguish features and do not limit a specific order or sequence.

[0051] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0052] This utility model provides a blower device 100, as shown in the reference. Figure 1 and Figure 2 As shown, the blower device 100 includes an air outlet duct 20, a fan assembly 30, and a heating element 40. The air outlet duct 20 has an air inlet 211 and an air outlet 212 at its two ends. The fan assembly 30 is disposed within the air outlet duct 20 and adjacent to the air inlet 211, and has a first central axis X1. The heating element 40 is disposed within the air outlet duct 20 and adjacent to the air outlet 212, and has a second central axis X2. The first central axis X2 is offset relative to the first central axis X1. The offset of the first central axis X2 relative to the first central axis X1 can be understood as the fan assembly 30 and the heating element 40 being eccentrically arranged, meaning that the central axis of the fan assembly 30 is parallel to the central axis of the heating element 40 and has a certain distance between them. For example, the first central axis X2 is offset relative to the first central axis X1 towards the side of the air outlet duct 20 where the handle 50 is located.

[0053] In addition, the air outlet 20 can also be connected to the handle 50. In order to facilitate storage and make the blower 100 more compact, the handle 50 is movably connected to the air outlet 20. For example, the handle 50 can rotate relative to the air outlet 20, so that the handle 50 can be folded so that the longitudinal direction of the handle 50 is roughly parallel to the longitudinal direction of the air outlet 20, so that the overall shape of the blower 100 is smaller.

[0054] The eccentric arrangement of the fan assembly 30 and the heating component 40 will cause the air duct to be partially offset, resulting in uneven airflow. To solve this problem, in this embodiment, an installation space 201 is further formed between the fan assembly 30 and the heating component 40. The installation space 201 is provided with a flow guiding structure 60, which includes a flow guiding surface 611. The flow guiding surface 611 is used to guide the passing airflow toward the heating component 40 and change the flow direction.

[0055] By forming an installation space 201 between the eccentrically arranged fan assembly 30 and the heating component 40, and by setting a guide structure 60 in the installation space 201, the airflow passing through the guide surface 611 changes direction as it moves toward the heating component 40, thereby distributing the airflow and achieving a better blowing effect.

[0056] In one embodiment, the guide surface 611 has a starting end 612 and an ending end 613 along the air outlet direction; the ending end 613 is offset relative to the starting end 612 along the direction from the first central axis X1 to the first central axis X2.

[0057] Based on this eccentric arrangement, a relatively compact installation space 201 is provided in the small-volume, high-speed hair dryer 100. A guide surface 611 is set within this area to effectively guide the airflow from the main flow path to the eccentric area where the heating element 40 is located. Thus, in a high-speed blowing environment, the guide surface 611 can precisely guide a portion of the airflow from one side of the main flow path of the blower assembly 30 to the other side of the heating element 40. In this way, the airflow coverage of the heating element 40 is more uniform, resulting in a more even distribution of airflow passing through the heating element 40, and consequently, more uniform temperature and velocity of the air blown out from the outlet 20. This not only improves user comfort when using the hair dryer 100 but also more effectively protects the hair, preventing damage caused by localized overheating or uneven airflow.

[0058] In this embodiment, when the hair dryer 100 operates at high speed, it can precisely deflect and guide the airflow in the main channel corresponding to the fan assembly 30, avoiding local overheating or insufficient airflow, thereby obtaining a more uniform outlet air temperature and better drying efficiency. Through the above-mentioned eccentric arrangement and airflow guiding design, the safety and convenience of use are further enhanced, meeting the user's multiple needs for a high-efficiency and lightweight hair dryer 100.

[0059] In one embodiment of this utility model, the flow guiding structure 60 includes a flow guiding plate 61, a flow guiding surface 611 is disposed on the flow guiding plate 61, and a first central axis X1 passes through the flow guiding plate 61.

[0060] By arranging the guide surface 611 on the guide plate 61, the guide structure 60 can remain relatively flat and is easy to process and assemble. In a high-speed airflow environment, the guide plate 61 can be more firmly fixed inside the air outlet duct 20, achieving a better airflow guiding effect. The first central axis X1 passes through the guide plate 61, allowing the airflow from the fan assembly 30 to directly impact the guide surface 611. This facilitates the constraint and guidance of the airflow entering the air outlet duct 20 through the guide surface 611, thereby improving airflow distribution efficiency and overall compactness. The aforementioned form of the guide plate 61 further enhances structural stability, reliably diverting the airflow to areas of the heating component 40 that are far from the fan assembly 30 while keeping the main flow channel unobstructed, thus enhancing the balance of air temperature and airflow during the drying process.

[0061] In one embodiment of the present invention, along the direction from the first central axis X1 to the first central axis X2, the starting end 612 is located on the side of the first central axis X1 away from the first central axis X2, and the ending end 613 is located between the first central axis X1 and the first central axis X2.

[0062] By setting the relative positions of the starting end 612 and the ending end 613 in this way, when the blower 100 is working, the airflow in the main channel that is far away from the heating element 40 can be gradually guided to the eccentric area where the heating element 40 is located, so that the airflow is more fully distributed in the part close to the heating element 40, thereby making the temperature and air volume distribution of the final air outlet more uniform; at the same time, the eccentric arrangement is effectively utilized in the limited internal space of the air outlet duct 20 to achieve flexible control of local airflow, further improving the heat dissipation and drying efficiency of the blower 100 in high-speed and miniaturized scenarios.

[0063] Reference Figure 3 and Figure 4In one embodiment of this utility model, the air outlet duct 20 includes a first inner wall 221 that defines an installation space 201, and an opening 202 is provided between the starting end 612 and the first inner wall 221. Along the direction from the first central axis X1 to the first central axis X2, the distance L1 from the starting end 612 to the first inner wall 221 is less than the distance L2 from the starting end 612 to the first central axis X2, or the distance L1 from the starting end 612 to the first inner wall 221 is greater than the distance L3 from the starting end 612 to the first central axis X1; or the distance L1 from the starting end 612 to the first inner wall 221 is less than the distance L2 from the starting end 612 to the first central axis X2 and the distance L1 from the starting end 612 to the first inner wall 221 is greater than the distance L3 from the starting end 612 to the first central axis X1.

[0064] By setting this opening 202 between the starting end 612 and the inner wall, and controlling the relative position of the opening 202 with the first and first central axes X2, a more flexible flow channel can be obtained when the high-speed airflow flows from the main channel to the area of ​​the eccentrically arranged heating component 40, avoiding unnecessary eddies or dead zones in the narrow space. At the same time, the opening 202 allows some airflow to directly enter the vicinity of the heating component 40 via a relatively short path, enhancing the effect of balanced air outlet temperature and air volume. Combined with the existing eccentric layout and flow guide surface 611 design, it further improves heat dissipation efficiency and blowing performance.

[0065] Reference Figure 3 and Figure 5 In one embodiment of the present invention, the flow guiding structure 60 includes a flow guiding plate 61, a flow guiding surface 611 is disposed on the flow guiding plate 61, the flow guiding surface 611 also has two side ends 615 adjacent to the starting end 612 and the ending end 613 respectively, the flow guiding plate 61 also includes an auxiliary guiding surface 616, the auxiliary guiding surface 616 bends from the two side ends 615 and extends in a direction away from the first central axis X2.

[0066] Because auxiliary guiding surfaces 616 are formed at both ends 615 of the guide plate 61, and the auxiliary guiding surfaces 616 extend outward relative to the first central axis X2, the lateral diffusion of the airflow can be further restricted, making the airflow entering the heating component 40 area more concentrated and stable. Under the eccentric layout structure, turbulence or air leakage on both sides of the air duct is avoided as much as possible. In a high-speed, small-volume environment, the efficiency of airflow introduction into the heating component 40 is maintained, thereby achieving a more refined airflow distribution and air temperature balance effect without increasing the overall volume of the air outlet.

[0067] Continue to refer to Figure 5In one embodiment of the present invention, the air outlet includes a first inner wall 221, which is concentrically arranged with the heating component 40. The heating component 40 is installed on the first inner wall 221, which defines the installation space 201. The guide plate 61 has two free ends 618 of the auxiliary guiding surface 616 respectively abutting against the first inner wall 221.

[0068] By abutting the free end 618 of the auxiliary guide surface 616 against the inner wall 221 of the first cylinder, turbulence or air leakage caused by airflow passing through the side gap can be further reduced in a high-speed airflow environment. This makes the concentric relationship between the guide structure 60 and the fan assembly 30 more closely maintained in the eccentric layout. This not only allows the airflow to be fully constrained and effectively distributed in the area of ​​the guide surface 611, but also allows the guide plate 61 to obtain a more stable fixed position, thus realizing the ingenious layout of the internal structure of the miniaturized blower 100 and stable high-speed operation.

[0069] Reference Figures 2 to 6 In one embodiment of this utility model, the air outlet duct 20 is provided with a fixing rib 23 extending toward the guide plate 61, and the guide plate 61 is provided with an installation groove 63. The fixing rib 23 extends into the installation groove 63 and connects with the guide plate 61.

[0070] By using the fixing rib 23 and the mounting groove 63 between the guide plate 61 and the air duct, the guide plate 61 can be kept in a stable position under the action of high-speed airflow. This not only facilitates quick assembly, but also effectively prevents the guide plate 61 from loosening or shifting during operation, thereby further improving the structural reliability and service life of the miniaturized blower 100 in the high wind speed environment.

[0071] Specifically, the fixing rib 23 includes a column 231 and a side wing 232 extending radially from the outer periphery of the column 231. The mounting groove 63 matches the shape of the fixing rib 23. When the fixing rib 23 is inserted into the mounting groove 63, screws and other fasteners 25 can pass through the guide plate 61 from the side facing away from the fixing rib 23 and connect with the fixing rib 23, thereby locking the guide plate 61 and the fixing rib 23. The cooperation between the side wing 232 and the mounting groove 63 can prevent the guide plate 61 from rotating. The guide plate 61, as an independent component, is fixedly connected to the air outlet through the fastener 25, which can simplify the structure of the air outlet and facilitate manufacturing.

[0072] Reference Figure 6In one embodiment of this utility model, the guide surface 611 is used to guide the airflow from the fan assembly 30 to flow in a direction offset from the fan assembly 30. The shape of the guide surface 611 can be configured to extend at a preset angle relative to the first central axis X1 from the starting end 612 to the ending end 613, that is, the guide surface 611 is constructed as an inclined surface. The shape of the guide surface 611 can also be configured to extend in a streamlined shape from the starting end 612 to the ending end 613, that is, the guide surface 611 is constructed as a smooth and regular surface, for example, the cross-sectional line of the guide surface 611 is slightly like the cross-sectional line of a water droplet, an ellipse, or a curve with a variable radius, etc. The shape of the guide surface 611 can also be configured to extend in an arc shape from the starting end 612 to the ending end 613, that is, the guide surface 611 is constructed as an arc surface. The shape of the guide surface 611 can also be configured to extend in a wavy shape from the starting end 612 to the ending end 613, that is, the guide surface 611 is constructed as a wavy surface.

[0073] Due to the limited available space inside the air duct, using guide surfaces 611 of different shapes can achieve a delicate airflow guiding effect without significantly increasing wind resistance. For example, streamlined or curved surfaces can make the airflow entering the eccentric area smoother and further reduce noise. If a wave-shaped design is chosen, the contact area between the airflow and the guide surface 611 can be increased in the limited space, which helps to distribute the airflow and dissipate heat, thereby maintaining more flexible and efficient air duct control in the overall miniaturized blower 100.

[0074] In one embodiment of this utility model, along the direction from the first central axis X1 to the first central axis X2, the straight direction F1 from the starting end 612 to the ending end 613 has a first acute angle α with the first central axis X1, the air guiding direction F2 of the starting end 612 of the guide surface 611 has a second acute angle β with the first central axis X1, and the air guiding direction of the ending end 613 of the guide surface 611 has a third acute angle γ with the first central axis X1. The first acute angle α is greater than the third acute angle γ, or the second acute angle β is greater than the third acute angle γ.

[0075] By forming a large deflection angle at the front of the guide surface 611, the airflow is rapidly deflected when it enters the initial area of ​​the guide surface 611. Then, a smaller angle is adopted in the end area 613, so that the airflow is guided more smoothly. This helps to reduce local turbulence or impact loss in the compact air duct structure, and further improves the uniform coverage of the airflow on the heating component 40, thereby balancing the air volume of high-speed blowing and the comfort of hair drying.

[0076] Furthermore, the densely packed components inside the air duct hinder heat dissipation, easily leading to overheating and affecting component lifespan. To address this issue, refer to... Figure 5In one embodiment of this utility model, a circuit board 70 is also provided in the installation space 201. The circuit board 70 is arranged along the airflow direction. Along the direction from the first central axis X1 to the first central axis X2, the guide surface 611 and the circuit board 70 are respectively located on both sides of the first central axis X2. The circuit board 70 has a front edge 71 adjacent to the heating component 40. The airflow direction F3 of the end 613 of the guide surface 611 or the straight direction F1 from the starting end 612 to the end 613 crosses the front edge 71.

[0077] Because the circuit board 70 is cleverly arranged within the mounting space 201, the airflow from the fan assembly 30 can pass over the surface of the circuit board 70 along the airflow direction for cooling. Utilizing the airflow passing through the mounting space 201 to dissipate heat from the circuit board 70 and other components effectively alleviates the heat dissipation problem caused by the reduced volume due to folding, achieving a balance between miniaturized layout and efficient drying performance. Furthermore, by using the eccentric airflow guide structure 60, and when the end 613 of the guide surface 611 crosses the front edge 71 of the circuit board 70, some airflow can be guided to the area below the heating element 40 without passing over the circuit board 70. This ensures that the heat dissipation requirements of the circuit board 70 and the balanced distribution of the outlet air temperature are considered within the high-speed, miniaturized structure, further improving the overall heat dissipation efficiency and reliability of the blower device 100.

[0078] A relatively compact installation space 201 is reserved in the small-volume, high-speed blower 100 to accommodate the circuit board 70 and the airflow guiding structure 60. Under the premise of reducing the overall volume of the foldable blower 100, sufficient installation space 201 can still be formed between the fan assembly 30 and the heating component 40. This not only improves the heat dissipation capacity of the circuit board 70, but also ensures the rationality of the airflow distribution and the overall compactness of the blower 100.

[0079] In one embodiment of this utility model, the air outlet duct includes a first inner wall 221 and a second inner wall arranged sequentially. The first inner wall 221 is concentrically arranged with the heating component 40, and the heating component 40 is installed on the first inner wall 221. The second inner wall is concentrically arranged with the fan assembly 30, and the fan assembly 30 is installed on the second inner wall. The first inner wall 221 is provided with a rib extending radially inward along the air outlet duct 20. The installation space 201 is limited between the second inner wall and the rib. Along the direction from the first central axis X1 to the first central axis X2, the projection of the guide surface 611 is located within the projection of the circuit board 70. The circuit board 70 has a front edge 71 adjacent to the heating component 40 and a rear edge 72 opposite to it. Along the air outlet direction, the distance L4 from the starting end 612 to the rear edge 72 is greater than the distance L5 from the end end 613 to the front edge 71.

[0080] By employing a structure where the heating element 40 on the inner wall 221 of the first cylinder is concentrically arranged with the fan assembly 30, and the inner wall of the second cylinder is concentrically arranged with the fan assembly 30, the fan assembly 30 and the heating element 40 can be precisely installed in an overall eccentric layout. Furthermore, by utilizing the radially inward protrusion of the ribs in the air outlet cylinder, a compact space for accommodating the circuit board 70 is defined, ensuring reliable fixation and sufficient airflow cooling for the circuit board 70. When the projection of the guide surface 611 onto the circuit board 70 overlaps and satisfies the condition that the distance from the starting end 612 to the rear edge 72 is greater than the distance from the end end 613 to the front edge 71, the airflow can maintain a more stable and efficient guiding direction in the eccentric region, reducing turbulence and the risk of localized overheating. This further enhances the heat dissipation and airflow distribution effect of the blower 100 under miniaturized, high-speed operation conditions.

[0081] Reference Figure 1 and Figure 2 In one embodiment of this utility model, the air outlet includes a cylinder body 21 and a grille back cover 26 connected to the cylinder body 21. An air inlet 211 is disposed on the grille back cover 26. Sound-absorbing cotton 261 and honeycomb mesh 262 are disposed between the cylinder body 21 and the grille back cover 26. The sound-absorbing cotton 261 and honeycomb mesh 262 are arranged sequentially along the air inlet direction.

[0082] By first configuring sound-absorbing cotton 261 at the air inlet 211 of the grille cover 26, operating noise can be effectively reduced in the initial stage when high-speed airflow enters the air outlet, and the airflow entering the air outlet is initially guided and intercepted to prevent hair or debris from being sucked into the fan assembly 30 area. The honeycomb mesh 262 arranged behind the sound-absorbing cotton 261 along the air inlet direction further evenly distributes the airflow, reduces airflow turbulence, and continues to achieve noise reduction. In conjunction with the aforementioned eccentric layout and airflow guiding structure 60, a relatively stable and quiet airflow environment is formed inside the miniaturized blower 100, while improving overall safety and comfort.

[0083] Furthermore, the air outlet 212 of the hair dryer 100 can be fitted with accessories for different hairstyle needs. If there is no stable and reliable connection structure between the accessories and the air outlet, they are prone to loosening or even falling off, which further restricts the user experience and safety of the hair dryer 100.

[0084] Therefore, in one embodiment of this utility model, the air outlet includes a cylinder body 21 and an air outlet cover 27 connected to the cylinder body 21. An air outlet 212 is disposed on the air outlet cover 27. An installation gap 271 is formed between the circumferential surface of the air outlet cover 27 and the cylinder body 21. A connecting groove 272 is provided on the circumferential surface of the air outlet cover 27. The connecting groove 272 penetrates the air outlet end face of the air outlet cover 27 and is L-shaped. It is used to guide the accessory to be inserted into the connecting groove 272 in the direction of air inlet and to be able to rotate relative to the air outlet 20 along the connecting groove 272.

[0085] By arranging L-shaped connecting grooves 272 around the air outlet cover 27, and providing corresponding protrusions on the accessory to mate with the connecting grooves 272, the user can insert the accessory in the direction of air inlet and then rotate it at a certain angle along the L-shaped connecting grooves 272 to achieve a secure assembly; a portion of the accessory's edge can remain within the installation gap 271. During high-speed blowing or multi-angle use, the accessory is less likely to loosen or slip off, effectively improving the ease of use and safety of the miniaturized blower 100, and meeting diverse design requirements.

[0086] The aforementioned hair dryer 100, by forming an installation space 201 between the eccentrically positioned fan assembly 30 and the heating element 40 and setting a guide structure 60, achieves a more uniform airflow distribution within a compact form. This ensures that the heating element 40 receives sufficient and stable airflow coverage in high-speed drying environments, reducing the occurrence of localized overheating or insufficient airflow. Simultaneously, components such as the circuit board 70 can utilize airflow for heat dissipation, effectively extending the lifespan of electronic components. Furthermore, this invention, through the combination of the grille back cover 26, sound-absorbing cotton 261, and honeycomb mesh 262, significantly reduces noise and prevents hair and debris from being sucked into the air duct, further enhancing safety and user comfort. The use of an L-shaped connecting groove 272 combined with accessory protrusions allows for stable installation of accessories in small-volume, high-speed environments, preventing loosening or detachment, thus achieving a comprehensive performance of portability, aesthetics, and efficient hair drying.

[0087] In summary, this utility model achieves miniaturization and lightweighting while balancing high-speed airflow efficiency with the heat dissipation requirements of internal components. Through a reasonable airflow design, it achieves more uniform air distribution, lower noise, and greater safety and convenience in use, demonstrating significant practical value and promising prospects for widespread adoption.

[0088] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0089] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A blower device, comprising: An air outlet duct, wherein an air inlet and an air outlet are respectively provided at both ends; A fan assembly is disposed inside the air outlet and adjacent to the air inlet, and the fan assembly has a first central axis. A heating element is disposed inside the air outlet and near the air outlet, and the heating element has a second central axis, which is offset relative to the first central axis. The feature is that an installation space is formed between the fan assembly and the heating component, and a flow guiding structure is provided in the installation space. The flow guiding structure includes a flow guiding surface, which is used to guide the passing airflow toward the heating component and change the flow direction.

2. The blower device according to claim 1, characterized in that, Along the direction of airflow, the guide surface has a starting end and an ending end; along the direction from the first central axis to the second central axis, the ending end is offset relative to the starting end.

3. The blower device according to claim 2, characterized in that, The flow guiding structure includes a flow guiding plate, the flow guiding surface is disposed on the flow guiding plate, and the first central axis passes through the flow guiding plate.

4. The blower device according to claim 2, characterized in that, Along the direction from the first central axis to the second central axis, the starting end is located on the side of the first central axis away from the second central axis, and the ending end is located between the first central axis and the second central axis.

5. The blower device according to claim 2, characterized in that, The air outlet duct includes a first inner wall defining the installation space, and an opening is provided between the starting end and the first inner wall; along the direction from the first central axis to the second central axis, the distance from the starting end to the first inner wall is less than the distance from the starting end to the second central axis, and / or the distance from the starting end to the first inner wall is greater than the distance from the starting end to the first central axis.

6. The blower device according to claim 2, characterized in that, Along the direction from the first central axis to the second central axis, the straight direction from the starting end to the ending end forms a first acute angle with the first central axis. The air guiding direction at the starting end of the guide surface forms a second acute angle with the first central axis. The air guiding direction at the ending end of the guide surface forms a third acute angle with the first central axis. The first acute angle is greater than the third acute angle, or the second acute angle is greater than the third acute angle.

7. The blower device according to claim 2, characterized in that, The flow guiding structure includes a flow guiding plate, and the flow guiding surface is disposed on the flow guiding plate. The flow guiding surface also has two side ends that are adjacent to the starting end and the ending end, respectively. The flow guiding plate also includes an auxiliary guiding surface, which is bent from the two side ends and extends in a direction away from the second central axis.

8. The blower according to claim 7, characterized in that, The air outlet includes a first inner wall, which is concentrically arranged with the heating component. The heating component is installed on the first inner wall, which defines the installation space. The guide plate has two free ends of the auxiliary guiding surface that abut against the first inner wall.

9. The blower according to any one of claims 2 to 8, characterized in that, The guiding surface must satisfy at least one of the following characteristics: The guide surface is configured to extend at a preset angle relative to the first central axis from the starting end to the ending end. The guide surface is configured to extend in a streamlined shape from the starting end to the ending end; The guide surface is configured to extend in an arc shape from the starting end to the ending end; The guide surface is configured to extend in a wavy shape from the starting end to the ending end.

10. The blower according to any one of claims 1 to 8, characterized in that, The flow guiding structure includes a flow guiding plate, the flow guiding surface is disposed on the flow guiding plate, the air outlet is provided with a fixing rib extending toward the flow guiding plate, the flow guiding plate is provided with a mounting groove, and the fixing rib extends into the mounting groove and connects with the flow guiding plate.

11. The blower according to any one of claims 2 to 8, characterized in that, The installation space is also provided with a circuit board, which is arranged along the airflow direction; along the direction from the first central axis to the second central axis, the guide surface and the circuit board are respectively located on both sides of the second central axis; the circuit board has a front edge adjacent to the heating component, and the airflow direction of the end of the guide surface or the straight line direction from the starting end to the end crosses the front edge.

12. The blower according to any one of claims 2 to 8, characterized in that, The air outlet duct includes a first inner wall and a second inner wall arranged sequentially. The first inner wall is concentrically arranged with the heating component, and the heating component is installed on the first inner wall. The second inner wall is concentrically arranged with the fan assembly, and the fan assembly is installed on the second inner wall. The first inner wall is provided with a rib extending radially inward along the air outlet duct. The installation space is defined between the second inner wall and the rib. A circuit board is also provided in the installation space. Along the direction from the first central axis to the second central axis, the projection of the guide surface is located within the projection of the circuit board. The circuit board has a front edge adjacent to the heating component and a rear edge opposite to it. Along the air outlet direction, the distance from the starting end to the rear edge is greater than the distance from the ending end to the front edge.

13. The blower according to any one of claims 1 to 8, characterized in that, The air outlet includes a cylinder body and a grille back cover connected to the cylinder body. The air inlet is located on the grille back cover. Sound-absorbing cotton and honeycomb mesh are provided between the cylinder body and the grille back cover. The sound-absorbing cotton and honeycomb mesh are arranged sequentially along the air inlet direction.

14. The blower according to any one of claims 1 to 8, characterized in that, The air outlet includes a cylinder body and an air outlet cover connected to the cylinder body. The air outlet is disposed on the air outlet cover. An installation gap is formed between the circumferential surface of the air outlet cover and the cylinder body. A connecting groove is provided on the circumferential surface of the air outlet cover. The connecting groove passes through the air outlet end face of the air outlet cover and is L-shaped. The connecting groove is used to guide the accessory to be inserted into the connecting groove in the air inlet direction and can rotate relative to the air outlet along the connecting groove.

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