A hair dryer

Abstract

The application belongs to the technical field of garden tools, and particularly relates to a blower, which comprises a motor, a front end of the motor being of an open type, and a rear end of the motor being provided with a rear end cover of a hollow type; a fan blade, the fan blade comprising a hub, a supporting ring, a main blade and a sub-blade, the hub being located at the center of the supporting ring, the sub-blade being located between the hub and the supporting ring to connect the hub and the supporting ring, and the main blade being located on the outer wall of the supporting ring; the hub is connected with the rotating shaft of the motor, and the hub, the sub-blade and the supporting ring are covered on the front end of the motor to form the front end cover of the motor. The motor is simultaneously cooled from the inner side and the outer side, the heat dissipation efficiency of the motor is greatly improved, the motor can keep high-load operation for a long time, and the overall working performance of the blower is improved.

Description

Technical Field

[0001] This invention belongs to the field of garden tool technology, specifically relating to a hair dryer. Background Technology

[0002] Currently, most axial flow hair dryers on the market use a fixed ducted motor assembly design. The duct generally includes an outer tube and an inner tube. The air outlet side of the inner tube is connected to a guide cone, and the motor is installed in the inner tube. That is, the motor is fixed in the inner tube and the guide cone assembly, forming two air channels, an inner and an outer one. The inner air channel dissipates heat from the motor, while the outer air channel is used to achieve the blowing function. However, during the operation of the hair dryer, if the current is high, the motor heats up too quickly, which leads to difficulty in heat dissipation and can easily cause the machine to be damaged or shut down for heat dissipation. Therefore, the heat dissipation performance of the motor limits the working efficiency of the hair dryer. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a hair dryer that can improve the heat dissipation performance of the motor, thereby improving the working efficiency of the hair dryer.

[0004] To achieve the above and other related objectives, the present invention provides a hair dryer, comprising: The housing has an internal air duct and an air inlet and an air outlet formed on the surface of the housing. The duct is detachably installed inside the housing. Multiple guide vanes are provided along the circumferential direction of the inner wall of the duct. A mounting base is provided inside the duct. One end of the guide vane is connected to the inner wall of the duct, and the other end extends toward the center of the duct and is at least partially connected to the outer wall of the mounting base. The motor fan blade assembly is placed inside the duct and includes a motor and a fan blade. One end of the motor is rotatably connected to the fan blade via a rotating shaft, and the other end is fixedly connected to the mounting base. The outer wall of the motor is exposed inside the duct.

[0005] In an optional embodiment of the present invention, the other end of the guide vane is connected to the mounting base, and the remaining part of the other end of the guide vane is placed on the outer periphery of the motor and has a gap between it and the motor.

[0006] In an optional embodiment of the present invention, the motor is an external rotor motor.

[0007] In an optional embodiment of the present invention, the guide vane is a non-planar structure, and the guide vane drives the airflow to flow axially while generating circumferential deflection.

[0008] In an optional embodiment of the present invention, the front end of the motor is an open structure, the fan blade is installed at the front end of the motor, and the rear end of the motor has a hollow rear end cover, which is fixedly connected to the mounting base.

[0009] In an optional embodiment of the present invention, the wind blade includes a hub, a support ring, a main blade, and an auxiliary blade. The hub is located at the center of the support ring, and the auxiliary blade is located between the hub and the support ring to connect the hub and the support ring. The main blade is located on the outer wall of the support ring. Multiple main blades and auxiliary blades are respectively provided and are arranged along the circumference of the support ring.

[0010] In an optional embodiment of the present invention, the hub is connected to the shaft of the motor, and the hub, the secondary blades, and the support ring cover the front end of the motor to form the front end cover of the motor.

[0011] In an optional embodiment of the present invention, the outer wall of the support ring has the same diameter as the outer wall of the motor.

[0012] In an optional embodiment of the present invention, the rear end of the mounting base is provided with a flow guide cone, and the tail end of the flow guide cone is provided with a through hole.

[0013] In an optional embodiment of the invention, the guide cone is detachably connected to the mounting base.

[0014] Motor fan blade assembly Motor fan blade assembly Motor motor motor motor motor motor fan blade assembly In an optional embodiment of the present invention, the air inlet is formed on both sides and / or the bottom of the housing.

[0015] In an optional embodiment of the present invention, a control circuit board is provided inside the housing, a battery pack compartment is provided on the housing, a removable battery pack is provided inside the battery pack compartment, and the battery pack is electrically connected to the control circuit board.

[0016] In an optional embodiment of the present invention, a control circuit board is provided inside the housing, and the control circuit board is electrically connected to the motor fan blade assembly.

[0017] The technical advantages of this invention are as follows: In this invention, the duct does not have a closed mounting structure to accommodate the motor. Instead, it has a disc-shaped mounting base, and the inner end of each guide vane forms a hollow mounting groove. When the motor is mounted on the mounting base, the outer wall of the motor is exposed in the duct through the gaps between the guide vanes, allowing the airflow in the duct to dissipate heat from the outside of the motor, thereby improving the motor's heat dissipation efficiency and enhancing the performance and service life of the blower.

[0018] The open front end and the hollowed-out rear end cover allow the motor to form a flow channel that runs through both ends of the motor. This flow channel can cool the motor from inside, further improving cooling efficiency.

[0019] The main fan blade is used to generate the working airflow of the hair dryer, while the auxiliary fan blade is used to generate the cooling airflow that flows through the inside of the motor. The present invention adopts an open front cover design and uses the airflow generated by the auxiliary fan blade to cool the inside of the motor. Combined with the airflow generated by the main fan blade to cool the motor from the outside, the motor can be cooled from both the inside and outside, which greatly improves the heat dissipation efficiency of the motor. This allows the motor to maintain high load operation for a long time and improves the overall working performance of the hair dryer.

[0020] By removing the enclosed mounting structure inside the duct, the diameter of the motor mounting structure is reduced. This results in a larger flow area between the motor and the inner wall of the duct, while allowing the main fan blade to be longer, thus further improving the working performance of the blower. Attached Figure Description

[0021] Figure 1 This is a perspective view of the hair dryer provided in an embodiment of the present invention; Figure 2 This is a perspective sectional view of the hair dryer provided in an embodiment of the present invention; Figure 3 This is a perspective view of the axial flow fan assembly provided in an embodiment of the present invention; Figure 4 This is a perspective sectional view of the axial flow fan assembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the airflow distribution principle of the axial flow fan assembly provided in an embodiment of the present invention; Figure 6 This is an exploded view of the axial flow fan assembly provided in an embodiment of the present invention; Figure 7 This is an exploded view of the axial flow fan assembly provided in an embodiment of the present invention from another perspective; Figure 8 This is a perspective view of the duct provided in an embodiment of the present invention; Figure 9 This is a perspective view of the fan blade provided in an embodiment of the present invention. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In the description of this invention, the terms "front side", "front end", "rear side", "rear end", etc., which describe the front and rear directions, are based on the general terminology used in the field for the orientation of motors, that is, one end of the motor shaft output is the front end and the other end is the rear end. In the specific solution of this invention, the air inlet side is the front end of the motor and the air outlet side is the rear end of the motor.

[0025] Please see Figures 1 to 9 As shown below, the technical solution of the present invention will be described in detail with reference to a handheld hair dryer. It should be understood that the present invention does not limit the specific form of the hair dryer. For example, the hair dryer can also be a backpack hair dryer.

[0026] Please see Figure 1-9 As shown, a handheld hair dryer includes a housing 10, a duct 20, and a motor fan blade assembly 30, the specific structure of which is as follows: Please see Figure 2 As shown, an air duct is formed inside the housing 10, and an air inlet 11 and an air outlet are formed on the surface of the housing 10. For example, a section of blowpipe 40 can be connected to the air outlet to extend it. In this embodiment, a handle is formed on the housing 10. The handle can be integrally injection molded with the housing 10. The handle is equipped with necessary control devices, such as mechanical switches (e.g., triggers, buttons) or electronic switches (e.g., touch buttons). These switches are connected to a control circuit board inside the housing 10 and can be used to control the start / stop of the blower, the airflow intensity, etc. In a specific embodiment, the housing 10 can be assembled from two half-shells, with symmetrical structures. Each half-shell is individually injection molded to facilitate demolding after molding. The handle can also be divided into two parts, located on the two half-shells respectively.

[0027] Please see Figure 3-8As shown, the duct 20 is detachably installed in the air duct. The inner wall of the duct 20 is provided with a plurality of guide vanes 21 extending inward. Each guide vane 21 is evenly arranged along the circumference of the duct 20. One end of each guide vane 21 is provided with a mounting seat 22, which connects each guide vane 21 into one piece. In this embodiment, the duct 20 is a one-piece molded structure. For example, the duct 20 can be integrally processed from plastic or metal materials. It is understood that the duct 20 in this invention does not have a closed mounting structure for accommodating the motor. Instead, it has a disc-shaped mounting base 22, and the inner end of each guide vane 21 forms a hollow mounting groove. When the motor is mounted on the mounting base 22, the outer wall of the motor is exposed inside the duct 20 through the gap between each guide vane 21, so that the airflow inside the duct 20 can dissipate heat from the outside of the motor, thereby improving the heat dissipation efficiency of the motor and improving the performance and service life of the blower. In a specific embodiment, the mounting base 22 is connected to the motor by bolts 23.

[0028] Please see Figure 7 , 8 As shown, in one specific embodiment, the guide vane 21 can be bent into a vortex shape, for example. It is understood that the vortex-shaped guide vane 21 can cause the airflow to flow axially while generating circumferential deflection, thereby alleviating turbulence on the air outlet side of the duct 20 and reducing wind resistance and noise.

[0029] Please see Figure 3-9 As shown, the motor fan blade assembly 30 includes a motor 31 and a fan blade 32. The fan blade 32 is connected to the shaft of the motor 31. The motor 31 is housed between each of the guide vanes 21, so that the outer wall of the motor 31 is exposed in the duct 20. One end of the motor 31 away from the fan blade 32 is fixedly connected to the mounting base 23. A control circuit board is provided inside the housing 10, and the control circuit board is electrically connected to the motor fan blade assembly 30.

[0030] Please refer to Figure 3-9. In one specific embodiment, the front end of the motor 31 has an open structure, and the rear end of the motor 31 has a hollowed-out rear end cover 311. It can be understood that the open front end and the hollowed-out rear end cover 311 allow the interior of the motor 31 to form a flow channel running through both ends of the motor 31. This flow channel can cool the motor from within, further improving cooling efficiency. Please refer to [reference missing]. Figure 4 As shown in the diagram, the line shown is the main flow channel W1, and the dashed arrow shows the cooling flow channel W2.

[0031] Please see Figure 9As shown, the fan blade 32 includes a hub 321, a support ring 322, a main blade 323, and an auxiliary blade 324. The hub 321 is located at the center of the support ring 322, and the auxiliary blade 324 is located between the hub 321 and the support ring 322 to connect the hub 321 and the support ring 322. The main blade 323 is located on the outer wall of the support ring 322. Multiple main blades 323 and multiple auxiliary blades 324 are respectively arranged and spaced apart along the circumference of the support ring 322. The hub 321 is connected to the rotating shaft of the motor 31. The hub 321, the auxiliary blades 324, and the support ring 322 cover the front end of the motor 31 to form the front end cover of the motor 31.

[0032] It is understood that the main fan blade 32 is used to generate the working airflow of the hair dryer, while the auxiliary fan blade 32 is used to generate the cooling airflow flowing through the inside of the motor 31. The present invention adopts an open front cover design and uses the airflow generated by the auxiliary fan blade 32 to cool the inside of the motor 31. Combined with the airflow generated by the main fan blade 32 to cool the motor 31 from the outside, the motor can be cooled from both the inside and outside, which greatly improves the heat dissipation efficiency of the motor. This allows the motor to maintain high load operation for a long time and improves the overall working performance of the hair dryer.

[0033] Please see Figure 5 As shown, the outer wall of the support ring 322 is flush with the outer wall of the motor 31. It can be understood that, since the closed mounting structure inside the duct 20 is removed, the diameter of the motor mounting structure is reduced. This results in a larger flow area between the motor and the inner wall of the duct 20 when the diameter of the duct 20 is fixed, and the length of the main fan blade 32 can be made longer, further improving the working performance of the blower.

[0034] Please see Figure 3-7 As shown, in one specific embodiment, the rear end of the mounting base 23 is provided with a guide cone 24, and the tail end of the guide cone 24 is provided with a through hole. It can be understood that the guide cone 24 can prevent turbulence from occurring on the blowing side of the motor, and the airflow inside the motor 31 can be discharged from the through hole at the tail end of the guide cone 24, forming an open inner cooling channel to avoid the accumulation of hot air.

[0035] Please see Figure 3-7 As shown, the flow guide cone 24 is detachably connected to the mounting base 23. For example, the front end of the flow guide cone 24 may be provided with an elastic buckle, and the mounting base 23 may be provided with a groove that engages with the elastic buckle. The elastic buckle can be engaged in the groove by deformation to achieve relative fixation between the flow guide cone 24 and the mounting base 23.

[0036] Please see Figure 1 , 2 As shown, in this embodiment, the air inlet 11 is formed on both sides and / or the bottom of the housing 10. It should be noted that the present invention does not limit the specific form of the air inlet 11. For example, in other alternative embodiments of the present invention, the air inlet 11 may also be provided at the end of the housing 10.

[0037] Please see Figure 1 , 2 As shown, in this embodiment, the housing 10 is provided with a battery pack compartment 12, which contains a removable battery pack. The battery pack is electrically connected to the control circuit board. It is understood that the battery pack compartment 12 is provided with necessary power terminals, which cooperate with the electrodes on the battery pack to obtain electrical energy. The battery pack compartment 12 may also be provided with a locking structure to keep the battery pack in the inserted state after it is inserted.

[0038] It is understood that the present invention can also be applied to backpack hair dryers, and may also include a backpack battery pack, wherein the control circuit board may be electrically connected to the backpack battery pack.

[0039] In summary, the duct 20 of this invention does not have a closed mounting structure for accommodating the motor; instead, it has a disc-shaped mounting base 23. Each guide vane 21 has an inner end forming a hollow mounting groove. When the motor is mounted on the mounting base 23, the outer wall of the motor is exposed inside the duct 20 through the gaps between the guide vanes 21, allowing the airflow inside the duct 20 to dissipate heat from the outside of the motor, thereby improving the motor's heat dissipation efficiency and enhancing the performance and lifespan of the blower. The open front end and the hollow rear end cover 311 allow the motor 31 to form a flow channel running through both ends of the motor 31, which can cool the motor from within, further improving cooling efficiency. The main fan blade 32 generates the working airflow of the blower, while the auxiliary fan blades... The 32 fan blades are used to generate cooling airflow through the motor 31. This invention adopts an open front cover design and uses the airflow generated by the auxiliary fan blades 32 to cool the inside of the motor 31. Combined with the airflow generated by the main fan blades 32 to cool the motor 31 from the outside, the invention achieves simultaneous heat dissipation from both the inside and outside of the motor, greatly improving the heat dissipation efficiency of the motor. This allows the motor to maintain high load operation for a long time and improves the overall working performance of the hair dryer. Because this invention removes the closed mounting structure inside the duct 20, the diameter of the motor mounting structure is reduced. This allows for a larger flow area between the motor and the inner wall of the duct 20, given a fixed diameter of the duct 20. Furthermore, the length of the main fan blades 32 can be made longer, further improving the working performance of the hair dryer.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0041] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0042] Throughout this specification, the terms "an embodiment," "embodiment," or "specific embodiment" refer to a particular feature, structure, or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the invention.

[0043] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0044] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0045] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0046] The above description of the embodiments shown in this invention (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the invention to the precise forms disclosed herein. Although specific embodiments and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the invention, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the invention in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the invention.

[0047] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0048] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A hair dryer, characterized in that, Applied to garden tools, including: The housing has an internal air duct and an air inlet and an air outlet formed on the surface of the housing. The duct is detachably installed inside the housing. Multiple guide vanes are provided along the circumferential direction of the inner wall of the duct. A mounting base is provided inside the duct. One end of the guide vane is connected to the inner wall of the duct, and the other end extends toward the center of the duct and is at least partially connected to the outer wall of the mounting base. A motor-fan assembly is placed inside the duct and includes a motor and a fan blade. One end of the motor is rotatably connected to the fan blade via a rotating shaft, and the other end is fixedly connected to the mounting base. The outer wall of the motor is exposed inside the duct. The other end of the guide vane is connected to the mounting base, and the remaining part of the other end of the guide vane is placed on the outer periphery of the motor, with a gap between it and the motor; The mounting base connects all the guide vanes into one unit, and the inner end of each guide vane forms a hollow mounting groove.

2. The hair dryer according to claim 1, characterized in that, The motor is an external rotor motor.

3. The hair dryer according to claim 1, characterized in that, The guide vane has a non-planar structure, and while driving the airflow to flow axially, it also generates circumferential deflection.

4. The hair dryer according to claim 1, characterized in that, The front end of the motor has an open structure, the fan blade is installed at the front end of the motor, and the rear end of the motor has a hollow rear end cover, which is fixedly connected to the mounting base.

5. The hair dryer according to claim 1, characterized in that, The fan blade includes a hub, a support ring, main blades, and auxiliary blades. The hub is located at the center of the support ring, and the auxiliary blades are located between the hub and the support ring to connect the hub and the support ring. The main blades are located on the outer wall of the support ring. Multiple main blades and auxiliary blades are provided and are arranged along the circumference of the support ring.

6. The hair dryer according to claim 5, characterized in that, The hub is connected to the motor shaft, and the hub, the auxiliary blades, and the support ring cover the front end of the motor to form the front end cover of the motor.

7. The hair dryer according to claim 5, characterized in that, The outer wall of the support ring has the same diameter as the outer wall of the motor.

8. The hair dryer according to claim 1, characterized in that, The rear end of the mounting base is provided with a flow guide cone, and the tail end of the flow guide cone is provided with a through hole.

9. The hair dryer according to claim 8, characterized in that, The guide cone is detachably connected to the mounting base.

10. The hair dryer according to claim 1, characterized in that, The air inlets are formed on both sides and / or the bottom of the housing.

11. The hair dryer according to claim 1, characterized in that, The housing contains a control circuit board, and the housing has a battery pack compartment containing a removable battery pack. The battery pack is electrically connected to the control circuit board.

12. The hair dryer according to claim 1, characterized in that, The housing contains a control circuit board, which is electrically connected to the motor fan blade assembly.

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