A hair dryer

Abstract

The present application belongs to the field of garden tools, and particularly relates to a blower, comprising: an air duct; a motor installed in the air duct and coaxially arranged with the air duct, the motor power P is greater than or equal to 1500W, and the maximum rotating speed n is greater than or equal to 30000 RPM; a fan blade located in the air duct and connected with a main shaft of the motor, the diameter d of the fan blade is greater than or equal to 84mm, and the fan blade is made of a metal material with a density p less than or equal to 2.8g / cm 3 The present application can effectively improve the stability of the fan blade, reduce the working noise, and prolong the service life of the fan blade by using the low-density metal material to make the fan blade, and has overcome the prejudice of the prior art, so that the working performance of the blower is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of garden tools, in particular to a blower. BACKGROUND

[0002] As a kind of garden tool, the blower can quickly clean fallen leaves and sand on the ground. However, the performance of the conventional blower is generally low, far lower than that of the gasoline blower. If the rotational speed of the blower is increased, it will result in excessive noise, affecting the physical and mental health of the operator. In addition, the fan blade and the duct of the existing blower are generally made of plastic material, and high speed will reduce the stability of these structures, affecting the service life of the blower. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a blower that can improve the blowing performance while ensuring stability.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a blower, comprising:

[0005] a wind tunnel;

[0006] a motor installed in the wind tunnel and coaxially arranged with the wind tunnel, the motor power P≥1500W, the maximum rotational speed n≥30000RPM;

[0007] a fan blade located in the wind tunnel, and the fan blade is connected with the main shaft of the motor, the diameter of the fan blade d≥84mm, and the fan blade is made of metal material with a density of ρ≤2.8g / cm 3 .

[0008] In an optional embodiment of the present application, the duct includes an outer tube and an inner tube, the inner tube is located at the center of the outer tube and is spaced apart from the inner wall of the outer tube, the outer tube and the inner tube are connected by a plurality of radial plates, the motor is installed in the inner tube, the radial plates are spaced apart along the circumference of the inner tube, and the plate surface of the radial plate is inclined relative to the axis of the inner tube to enable the airflow to produce circumferential deflection when passing through the radial plate.

[0009] In an optional embodiment of the present application, one end of the inner tube close to the fan blade is provided with an end plate, the end plate is provided with an air inlet hole, the end of the inner tube away from the fan blade is provided with a flow guide cone, the tail of the flow guide cone is provided with an air outlet hole, and the motor and the inner tube are provided with a heat dissipation flow channel communicating the air inlet hole and the air outlet hole.

[0010] In an optional embodiment of the present application, the flow guide cone is detachably connected with the inner tube, and a quick connection mechanism is arranged between the flow guide cone and the inner tube, the quick connection mechanism comprising a plug block fixed with the flow guide cone, the plug block being cantilevered along the circumference of the flow guide cone, a plug hole being arranged on the tube wall of the inner tube, one end of the plug hole being provided with a sink formed on the outer wall of the inner tube, and the other end of the plug hole being provided with a stop block cantilevered into the plug hole along the circumference of the inner tube.

[0011] In an optional embodiment of the present application, the fan blade is made of magnesium alloy or aluminum alloy.

[0012] In an optional embodiment of the present application, the motor power P = 1500 W, and the fan blade diameter d = 84 mm.

[0013] In an optional embodiment of the present application, the motor power P = 2000 W, and the fan blade diameter d = 96 mm.

[0014] In an optional embodiment of the present application, a sound insulation layer is arranged on the inner wall of the air duct.

[0015] In an optional embodiment of the present application, the air duct comprises, which are arranged in sequence:

[0016] an air inlet pipe;

[0017] a duct connected with the air inlet pipe, the motor being installed in the duct;

[0018] a blowing head assembly connected with the duct;

[0019] The sound insulation layer at least comprises a first sound insulation layer arranged on the inner wall of the air inlet pipe.

[0020] In an optional embodiment of the present application, the duct and the blowing head assembly are connected through a corrugated pipe; and the sound insulation layer further comprises a second sound insulation layer arranged on the inner wall of the corrugated pipe.

[0021] In an optional embodiment of the present application, the first sound insulation layer is in a conical cylinder structure, the outer wall of the first sound insulation layer is provided with adhesive, and the first sound insulation layer is fixedly bonded with the inner wall of the air inlet pipe through the adhesive.

[0022] In an optional embodiment of the present application, the second sound insulation layer is in a tubular structure, the outer wall of the second sound insulation layer is provided with a plurality of convex parts distributed in a corrugated manner, and the convex parts are embedded in the valleys of the inner wall of the corrugated pipe.

[0023] In an optional embodiment of the present application, the air inlet pipe and the duct are externally provided with a casing, a handle portion is formed on the casing, a switch assembly is arranged on the handle portion, a control module is arranged in the casing, and the switch assembly and the motor are electrically connected with the control module.

[0024] In an optional embodiment of the present application, a battery pack compartment is formed on the casing, and a battery pack is arranged in the battery pack compartment, and the battery pack is electrically connected with the control module.

[0025] In an optional embodiment of the present application, the battery pack compartment is located at the tail end of the air inlet pipe, and air inlets are arranged on the side wall and the bottom wall of the casing between the battery pack compartment and the air inlet pipe.

[0026] In an optional embodiment of the present application, the air inlet pipe and the duct are externally provided with a casing, a control module is arranged in the casing, and a handle portion is arranged on the outside of the blowing head assembly, a switch assembly is arranged on the handle portion, and the switch assembly and the motor are electrically connected with the control module.

[0027] In an optional embodiment of the present application, a backpack battery pack is further included, the air duct is movably connected with the backpack battery pack, and the control module is electrically connected with the backpack battery pack.

[0028] In an optional embodiment of the present application, a buffer washer is arranged between the duct and the blowing head assembly.

[0029] The technical effect of the present application is that:

[0030] The present application uses low-density metal material to make the fan blade, which can effectively improve the stability of the fan blade, reduce the working noise, and improve the service life of the fan blade.

[0031] The present application uses low-density metal alloy as the fan blade, which improves the structural strength of the fan blade while realizing the lightweight of the fan blade, reduces energy loss, and further improves the working efficiency.

[0032] The sound insulation layer of the present application can further reduce the working noise of the hair dryer and improve the working environment of the operator.

[0033] The present application can set a buffer washer between the duct and the blowing head assembly to inhibit the vibration from the duct to the blowing head assembly, thereby avoiding the resonance of the blowing head assembly, reducing the noise, improving the stability of the air duct structure, and further improving the service life of the hair dryer.

[0034] The radial plate can guide the airflow, so that the airflow flows downstream in a spiral shape after passing through the radial plate, which can avoid turbulence caused by the airflow interfering with each other after passing through the radial plate, improve the passing property of the airflow, and further reduce the noise in the air duct.

[0035] The airflow generated by the fan blade can pass through the inner tube and then exchange heat with the motor in the inner tube, so as to take away the heat generated by the operation of the motor, realize automatic cooling of the motor, and effectively improve the service life of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a perspective structural schematic view of a handheld hair dryer provided by an embodiment of the application;

[0037] Figure 2 is a sectional view of the handheld hair dryer provided by the embodiment of the application;

[0038] Figure 3 is a perspective structural schematic view of a backpack hair dryer provided by an embodiment of the application;

[0039] Figure 4 is a sectional view of the backpack hair dryer provided by the embodiment of the application;

[0040] Figure 5 is an explosion view of an air inlet pipe of the hair dryer provided by the embodiment of the application;

[0041] Figure 6 is an explosion view of a bellows provided by the embodiment of the application;

[0042] Figure 7 is a sectional view of a duct and its accessories provided by the embodiment of the application;

[0043] Figure 8 is an explosion view of the duct and its accessories provided by the embodiment of the application;

[0044] Figure 9 is a perspective view of the duct provided by the embodiment of the application;

[0045] Figure 10 is an A-A sectional view of Figure 7 ;

[0046] Figure 11 is a perspective view of a flow guide cone provided by the embodiment of the application;

[0047] Figure 12 is an I partial enlarged view of Figure 8 ; DETAILED DESCRIPTION

[0048] Following make the embodiments of the present application through specific, the person skilled in the art can easily understand the other advantages and efficacy of the present application from the disclosure of the present application. The present application can also be implemented or applied by another different embodiment, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0049] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change, and the component layout pattern may be more complex.

[0050] Please refer to Figures 1-6 The technical solutions of the present application are described in detail in combination with the two embodiments of handheld hair dryer and backpack hair dryer. It can be understood that the present application is an improvement on the air duct and power components of the hair dryer, and there is no special restriction on the specific form of other components of the hair dryer, so it is not excluded that the air duct and power components of the present application also exist in other hair dryer types not mentioned in the present application. The hair dryer containing the air duct and power components of the present application belongs to the scope of protection of the present application.

[0051] Example 1

[0052] Please refer to Figure 1 , 2 A handheld hair dryer is shown in FIG. 1, which includes an air duct 10, a motor 20 and a fan blade 30. It can be understood that the hair dryer described in the present application refers to an axial flow hair dryer, the motor 20 and the fan blade 30 are coaxially arranged with the air duct 10, the sweeping area of the fan blade 30 covers most of the area of the air duct 10, and enough space is reserved between the motor 20 and the inner wall of the air duct 10 for airflow to pass through. In order to prevent turbulence at the rear end of the motor 20, a flow guide cone can also be installed at the rear end of the motor 20.

[0053] It can be understood that the air duct 10 described in the present application belongs to a functional feature, which mainly refers to a semi-closed space with a certain length, which is circumferentially closed at one end and open at both ends. The specific structure of the air duct 10 is not particularly limited, for example, the air duct 10 can be a continuous tubular object, or a plurality of tubular objects can be spliced along the axial direction, or more than two arc-shaped shells can be spliced along the circumferential direction.

[0054] In the application, the motor 20 has a power P≥1500W and a maximum rotating speed n≥30000RPM; the fan blade 30 is connected with the main shaft of the motor 20, the diameter d of the fan blade 30 is ≥84mm, and the fan blade 30 is made of a metal material with a density ρ≤2.8g / cm 3 .

[0055] It can be understood that the diameter of the fan blade 30, the power of the motor 20, the maximum rotating speed of the motor 20 and other parameters in the application are all greater than those of the conventional hair dryer, which can generate greater blowing force to adapt to the use requirements under complex working conditions.

[0056] It should be noted that the improvement of the power component in the application is not only reflected in the change of the parameters, but in fact, simply changing the parameters of the power component without changing the existing design will lead to a series of derivative problems, for example, simply increasing the above parameters will increase the load of the fan blade 30, and the fan blade 30 in the prior art is generally made of plastic material, so it will cause the fan blade 30 to vibrate intensively, which on the one hand will increase the noise, and on the other hand will reduce the service life of the fan blade 30. In order to overcome the above problems, the fan blade 30 is made of a low-density metal material in the application, which can effectively improve the stability of the fan blade 30, reduce the working noise and improve the service life of the fan blade 30, so the application overcomes the bias of the prior art and makes a breakthrough in the working performance of the hair dryer.

[0057] Please refer to Figure 9 , in a specific embodiment, the duct 12 includes an outer pipe 121 and an inner pipe 122, the inner pipe 122 is located at the center of the outer pipe 121 and is arranged in a spaced manner with the inner wall of the outer pipe 121, the outer pipe 121 and the inner pipe 122 are connected through the web plate 125, the motor 20 is installed in the inner pipe 122, a plurality of web plates 125 are arranged in a spaced manner along the circumference of the inner pipe 122, and the plate surface of the web plate 125 is arranged in an inclined manner relative to the axis of the inner pipe 122, so that the airflow can be deflected in the circumferential direction when passing through the web plate 125. It can be understood that the airflow will inevitably be blocked and cut by the web plate 125, in the embodiment, the web plate 125 can guide the airflow to flow downstream in a spiral shape after passing through the web plate 125, which can avoid turbulence caused by the mutual interference of the airflow after passing through the web plate 125, improve the passing property of the airflow, and further reduce the noise in the air duct 10.

[0058] Please refer to Figure 7 , 9As shown, in an embodiment, the inner tube 122 is provided with an end plate 1223 at one end close to the fan blade 30, the end plate 1223 is provided with an air inlet hole 1221, the inner tube 122 is provided with a flow guide cone 123 at one end away from the fan blade 30, the tail of the flow guide cone 123 is provided with an air outlet hole 1231, the motor 20 and the inner tube 122 are provided with a heat dissipation flow channel 1222 which communicates the air inlet hole 1221 and the air outlet hole 1231. It can be understood that in this embodiment, the airflow generated by the fan blade 30 can pass through the inner tube 122, and then exchange heat with the motor 20 in the inner tube 122, carrying away the heat generated by the operation of the motor 20, realizing the automatic cooling of the motor 20, and effectively improving the service life of the motor 20.

[0059] As shown in the drawings, Figures 7-12 As shown, the flow guide cone 123 is detachably connected with the inner tube 122, and the flow guide cone 123 and the inner tube 122 are provided with a quick connection mechanism, the quick connection mechanism includes a plug 1232 fixedly connected with the flow guide cone 123, the plug 1232 is cantilevered along the circumference of the flow guide cone 123, the wall of the inner tube 122 is provided with a plug hole 1224 matched with the plug 1232, one end of the plug hole 1224 is provided with a groove 1225 formed in the outer wall of the inner tube 122, the other end of the plug hole 1224 is provided with a stop block 1226 cantilevered into the plug hole 1224 along the circumference of the inner tube 122. It can be understood that the detachable connection of the flow guide cone 123 and the inner tube 122 facilitates the installation and disassembly of the motor 20, and at the same time, the quick connection device between the flow guide cone 123 and the inner tube 122 in this embodiment can realize the quick installation and disassembly of the flow guide cone 123 and the inner tube 122; during installation, the plug 1232 is first contracted radially inward by external force, then the plug 1232 is inserted into the inner tube 122, and then the flow guide cone 123 is rotated, during this process, the stop block 1226 will elastically deform radially outward, when the flow guide cone 123 is rotated by a certain angle, the plug 1232 is clamped into the groove 1225 under the action of its own elasticity, at this time, the stop block 1226 is just staggered with the plug 1232, the stop block 1226 resets under the action of its own elasticity, and then abuts against the end of the plug 1232 to prevent the flow guide cone 123 from being reversed. In this embodiment, in order to facilitate the insertion of the flow guide cone 123 into the inner tube 122, the flow guide cone 123 is further provided with a positioning plate 1233, which is in contact with the inner wall of the inner tube 122 when the flow guide cone 123 is assembled with the inner tube 122. In order to further improve the stability between the flow guide cone 123 and the inner tube 122, for example, a rubber ring 124 can also be provided between the flow guide cone 123 and the inner tube 122.

[0060] In an embodiment, the fan blade 30 can be made of magnesium alloy or aluminum alloy, the density of the magnesium alloy is generally 1.8 g / cm 3The density of the aluminum alloy is generally 2.7g / cm 3 It can be understood that the low-density metal alloy is used as the fan blade 30 to improve the structural strength of the fan blade 30, realize the lightweight design of the fan blade 30, reduce the energy loss, and further improve the working efficiency.

[0061] The following two groups of parameters are preferred, and the following two groups of parameters are measured by experiments. Under the conditions, the hair dryer can achieve better energy conversion rate.

[0062] When the power P of the motor 20 is 1500W, the diameter d of the fan blade 30 is 84mm.

[0063] When the power P of the motor 20 is 2000W, the diameter d of the fan blade 30 is 96mm.

[0064] The comparison data of the above two groups of parameters and other reference examples are as follows:

[0065]

[0066] As can be seen from the above table, under the conditions of the above two groups of preferred parameters, the working efficiency of the hair dryer is obviously higher than that under the conditions of other parameters.

[0067] Please refer to Figure 2 In a further specific embodiment of the present application, a sound insulation layer is arranged on the inner wall of the air duct 10. It can be understood that the sound insulation layer can further reduce the working noise of the hair dryer and improve the working environment of the operator. The sound insulation layer can be, for example, sound insulation cotton.

[0068] Please refer to Figure 2 The air duct 10 includes an air inlet pipe 11, a duct 12 and a blowing head assembly 13 arranged in sequence. Specifically, the duct 12 is connected with the air inlet pipe 11, and the motor 20 is installed in the duct 12. The blowing head assembly 13 is connected with the duct 12. The sound insulation layer at least includes a first sound insulation layer 111 arranged on the inner wall of the air inlet pipe 11.

[0069] It can be understood that the present application sets the air duct 10 as a multi-section structure, which also helps to alleviate vibration and noise. The motor 20 and the fan blade 30 of the present application only exist in the duct 12, which facilitates the isolation of the vibration generated by the motor 20 and the fan blade 30. For example, a buffer gasket can be provided between the duct 12 and the air inlet pipe 11 and between the duct 12 and the blowing head assembly 13. It can be understood that the overhanging distance of the blowing head assembly 13 is long. The present application provides a buffer gasket between the duct 12 and the blowing head assembly 13 to inhibit the conduction of vibration from the duct 12 to the blowing head assembly 13, thereby avoiding the resonance of the blowing head assembly 13. At the same time of reducing noise, the stability of the structure of the air duct 10 is improved, thereby further improving the service life of the hair dryer.

[0070] As shown in Figure 2 The air inlet pipe 11 and the outer portion of the duct 12 are provided with a machine shell 40. The machine shell 40 is formed with a handle portion 41. The handle portion 41 is provided with a switch assembly 42. The machine shell 40 is provided with a control module 50. The switch assembly 42, the motor 20 and the control module 50 are electrically connected. The machine shell 40 is formed with a battery pack compartment 43. The battery pack compartment 43 is provided with a battery pack (not shown in the figure). The battery pack is electrically connected with the control module 50. The battery pack compartment 43 is located at the tail end of the air inlet pipe 11. The machine shell 40 side wall and bottom wall between the battery pack compartment 43 and the air inlet pipe 11 are provided with an air inlet 44. It can be understood that, in order to further alleviate noise and vibration, a buffer pad can be provided between the duct 12 and the machine shell 40.

[0071] Embodiment 2

[0072] As shown in Figures 3-6 A backpack hair dryer includes an air duct 10, a motor 20, a fan blade 30 and a backpack battery pack 60. It can be understood that the power components of the backpack hair dryer in the present embodiment can adopt the same parameter configuration as in the above-mentioned embodiment 1.

[0073] The difference between the present embodiment and the above-mentioned embodiment 1 lies in the structure of the air duct 10. In the present embodiment, the air duct 10 includes an air inlet pipe 11, a duct 12, a corrugated pipe 14 and a blowing head assembly 13 arranged in sequence. Specifically, the duct 12 is connected with the air inlet pipe 11. The motor 20 is installed in the duct 12. The duct 12 and the blowing head assembly 13 are connected through the corrugated pipe 14. The sound insulation layer includes a first sound insulation layer 111 arranged in the air inlet pipe 11 and a second sound insulation layer 141 arranged on the inner wall of the corrugated pipe 14. The air duct 10 is movably connected with the backpack battery pack 60. The motor 20 is electrically connected with the backpack battery pack 60.

[0074] It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12.

[0075] It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12. Figure 5 It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12.

[0076] Figure 6 It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12.

[0077] It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12. Figure 4

[0078] It can be understood that the relative movement between the air inlet pipe 11 and the backpack battery pack 60 in the embodiment is limited, so in order to freely adjust the blowing direction of the blowing head assembly 13, a flexible bellows 14 is arranged between the blowing head assembly 13 and the air inlet pipe 11 and the duct 12.

[0079] ​​The above-described embodiments are merely illustrative for the principles of the application and its efficacy, and are not intended to limit the application. Any modification or change to the above-described embodiments can be made by any person skilled in the art without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the application should be covered by the claims of the application.

[0080] In the description of the description herein, many specific details are provided, such as examples of components and / or methods, in order to provide a thorough understanding of embodiments of the present application. It will be apparent, however, to one skilled in the art that the embodiments of the present application can be practiced without one or more of the specific details, or with other devices, systems, components, methods, materials, parts, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of embodiments of the present application.

[0081] Reference throughout this specification to "an embodiment", "embodiments" or "certain embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application and is not necessarily included in all embodiments. Thus, the appearances of the phrase "in one embodiment", "in an embodiment", or "in certain embodiments" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the application can be combined in any suitable manner in one or more other embodiments. It is understood that other variations and modifications of the applications described and illustrated herein can be made based on the teachings herein, and that such variations and modifications are to be considered as within the spirit and scope of the applications.

[0082] It is also to be understood that one or more of the elements of the drawings shown can also be implemented in a more separated or more integrated manner, or even removed because in certain cases this is not operational or because it can be useful according to a particular application.

[0083] In addition, unless explicitly stated otherwise, any reference signs in the drawings should be considered only as illustration and not as a limitation of the application. Furthermore, unless specifically stated otherwise, the use of the term "or" as used herein is generally intended to mean "and / or", i.e. to include the conjunctive as well as the disjunctive sense. Combinations of components or steps will also be considered as if specifically indicated in the claims.

[0084] As used in the description of the description herein and in the claims that follow, unless otherwise indicated, the use of "a" or "an" is intended to mean "one or more". Also, as used in the description of the description herein and in the claims that follow, unless otherwise indicated, the use of "in" is intended to mean "in and / or on".

[0085] The above description of the illustrated embodiments of the application (including what is described in the abstract) is not intended to be exhaustive or to limit the application to the precise forms disclosed. While specific embodiments of, and examples for, the application are described herein for illustrative purposes, various equivalent modifications are possible within the spirit and scope of the application, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications can be made to the above described embodiments of the application and yet the application will fall within the scope of the application. In some cases, certain features, functions, and / or elements can be combined and / or divided into separate features, functions, and / or elements. In some cases, certain features, functions, and / or elements can be omitted completely without departing from the scope of the application.

[0086] The systems and methods have been described generally herein as facilitating an understanding of the details of the application. Moreover, various specific details have been given in order to provide a thorough understanding. It will be appreciated, however, that one of ordinary skill in the relevant art will recognize and appreciate that embodiments of the application can be practiced without one or more of the specific details, or with other devices, systems, assemblies, methods, components, materials, parts, and / or the like. In other instances, well-known structures, materials, and / or operations have not been shown or described in detail in order to avoid obscuring aspects of embodiments of the application.

[0087] Accordingly, although the application has been described herein in reference to specific embodiments thereof, many modifications, alterations and changes can be suggested to one skilled in the art and it is intended to include all such modifications, alterations and changes in the scope of the present application. Accordingly, the specification and figures are to be regarded in an illustrative manner and representations are to be deemed as abstractions of the principles of the application. The application is not limited to the exact details shown and described and obvious modifications will be apparent to one skilled in the art. Thus, numerous modifications can be made to the specific embodiments described above without departing from the spirit and scope of the application. Therefore, the scope of the application is indicated by the appended claims, and all changes that come within the meaning and range of equivalents are intended to be embraced.

Claims

1. A hair dryer characterized by, The utility model relates to a kind of air duct, including: Air duct, the air duct includes sequentially arranged air inlet pipe, culvert and blow head component, the culvert is connected with the air inlet pipe, the blow head component is connected with the culvert, and buffer washer is provided between the culvert and the air inlet pipe and / or between the culvert and the blow head component;The outer portion of the air inlet pipe and the culvert is provided with machine shell, handle portion is formed on the machine shell; Motor, installed in the air duct and coaxially arranged with the air duct, the motor is installed in the culvert, the motor power P is greater than or equal to 1500W, and the maximum rotating speed n is greater than or equal to 30000RPM; The fan blade is located in the air duct and connected with the main shaft of the motor, the diameter d of the fan blade is greater than or equal to 84 mm, and the fan blade is made of a metal material with a density p less than or equal to 2.8 g / cm 3 . The culvert includes inner tube, the inner tube is provided with flow guide cone away from the end of the fan blade, the flow guide cone is connected with the inner tube in a detachable manner by quick-connection mechanism, the quick-connection mechanism includes plug block fixed with the flow guide cone, the plug block is cantilevered along the circumferential direction of the flow guide cone, the inner tube is provided with insertion hole matched with the plug block on the tube wall, one end of the insertion hole is provided with the sink formed on the outer wall of the inner tube, and the other end of the insertion hole is provided with stop block cantilevered into the insertion hole along the circumferential direction of the inner tube.

2. The hair dryer of claim 1, wherein The culvert further includes outer tube, the inner tube is located at the center of the outer tube and is spaced apart from the inner wall of the outer tube, the outer tube is connected with the inner tube through radial plate, the motor is installed in the inner tube, the radial plate is provided with a plurality of radial plates, and the plurality of radial plates are spaced apart along the circumferential direction of the inner tube, the plate surface of the radial plate is inclined relative to the axis of the inner tube, so that the airflow can be circumferentially deflected when passing through the radial plate.

3. The hair dryer of claim 2, wherein, The inner tube is provided with end plate close to the end of the fan blade, the end plate is provided with air inlet hole, the tail portion of the flow guide cone is provided with air outlet hole, and the motor is provided with heat dissipation flow channel communicating the air inlet hole and the air outlet hole between the motor and the inner tube.

4. The hair dryer of claim 1, wherein: The fan blade is made of magnesium alloy or aluminum alloy.

5. The hair dryer of claim 1, wherein: The motor power P is 1500W or 2000W, when the motor power P is 1500W, the diameter d of the fan blade is 84mm, and when the motor power P is 2000W, the diameter d of the fan blade is 96mm.

6. The hair dryer of claim 1, wherein: The culvert and the blow head component are connected by bellows.

7. The hair dryer of claim 6, wherein The inner wall of the air duct is provided with sound insulation layer, the sound insulation layer at least includes first sound insulation layer provided on the inner wall of the air inlet pipe and / or second sound insulation layer provided on the inner wall of the bellows.

8. The hair dryer of claim 7, wherein, The first sound insulation layer is conical cylinder structure, the outer wall of the first sound insulation layer is provided with back glue, and the first sound insulation layer is fixed by back glue and the inner wall of the air inlet pipe.

9. The hair dryer of claim 7, wherein: The second sound insulation layer is tubular structure, the outer wall of the second sound insulation layer is provided with convex portion distributed in corrugated shape, and the convex portion is embedded in the trough of the inner wall of the bellows.

10. The hair dryer of claim 1, wherein: The handle portion is provided with switch assembly, the machine shell is provided with control module, and the switch assembly and the motor are electrically connected with the control module.

11. The hair dryer of claim 10, wherein: The machine shell is formed with battery pack storage, the battery pack is installed in the battery pack storage, and the battery pack is electrically connected with the control module;The battery pack storage is located at the tail end of the air inlet pipe, and the machine shell side wall and / or bottom wall between the battery pack storage and the air inlet pipe is provided with air inlet.

12. The hair dryer of claim 6, wherein: The air inlet pipe and the outside of the duct are provided with a machine shell, the machine shell is provided with a control module, the outside of the blowing head assembly is provided with a handle part, the handle part is provided with a switch assembly, and the switch assembly, the motor and the control module are electrically connected. The air duct is movably connected with the backpack battery pack, and the control module is electrically connected with the backpack battery pack.

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