Hair drier capable of preventing hair from winding

Abstract

The utility model discloses a hair dryer capable of preventing hair from winding, which belongs to the technical field of household appliances and is characterized in that a shell of the hair dryer comprises an air duct extending front and back and a handle arranged below the air duct, an air inlet is arranged at the bottom of the handle, an air outlet is arranged at the front end of the air duct, and an airflow channel is formed between the air inlet and the air outlet. The motor assembly is installed in the handle and located on the upper side of the air inlet and comprises a stator, a rotor with a motor shaft and fan blades installed at the lower end of the motor shaft, an airflow gap extending towards the rotor is formed between the upper side of the fan blades and the lower end of the stator, and blades extending into the airflow gap are arranged at the lower end of the stator. The blade blocks and cuts the hair flowing into the airflow gap. The hair drier can achieve multiple hair winding prevention protection, and the service life of the hair drier is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a hair dryer which can prevent hair from winding. Background Art

[0002] The hair dryer is equipped with an air inlet and an air outlet. External air is sucked in through the air inlet. The air is heated by the heating components in the hair dryer, and finally the high-speed, high-temperature airflow at the air outlet quickly dries the hair. At present, the speed of new hair dryers can reach more than 100,000, achieving a more efficient drying efficiency. However, the air inlet position of the hair dryer produces a large negative pressure. During the use of the hair dryer, it is easy to suck slender foreign objects such as hair into the air inlet of the hair dryer. After the foreign objects enter the air inlet, most of the foreign objects will flow along the air flow channel between the air inlet and the air outlet with the air flow, and finally blown out from the air outlet. However, some foreign objects will still flow radially into the rotating parts of the hair dryer, causing the hair dryer to increase its load, reduce its speed, and be in a high temperature state. When accumulated to a certain extent, the hair dryer motor will burn out, causing damage to the hair dryer.

[0003] In view of the above problems, the existing hair dryer solves the problem of foreign matter inhalation as follows:

[0004] 1. Add a rotating blade to cut foreign matter. The rotating blade is driven by a motor, which will increase the motor load. For models with small duct diameter, the duct obstruction is also serious.

[0005] 2. Add barrier ribs inside the fan blades to make foreign objects entangled in the barrier area. However, some foreign objects will bypass the barrier ribs and entangle on the rotating parts, resulting in increased resistance and excessive motor load; some foreign objects will bypass the barrier ribs and entangle on the stator. Due to the limited storage space, they will still interfere with the rotating parts to a certain extent, resulting in increased resistance and excessive motor load. Utility Model Content

[0006] The utility model aims to provide a hair dryer that prevents hair from being tangled, thereby solving the problems in the prior art that the use of spiral blades will increase the load on the motor, and that some foreign matter will bypass the barrier ribs and entangle on the rotating parts, resulting in increased resistance and excessive motor load.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hair dryer for preventing hair entanglement, comprising a shell and a motor assembly, the shell comprising a wind tube extending forward and backward and a handle arranged below the wind tube, the bottom of the handle is provided with an air inlet, the front end of the wind tube is provided with an air outlet, an air flow channel is formed between the air inlet and the air outlet, the motor assembly is installed in the handle and is located on the upper side of the air inlet, the motor assembly comprises a stator, a rotor with a motor shaft, and a fan blade installed at the lower end of the motor shaft, an air flow gap extending toward the rotor is formed between the upper side of the fan blade and the lower end of the stator, the lower end of the stator is provided with a blade extending into the air flow gap, and the blade blocks and cuts the hair flowing into the air flow gap.

[0008] After adopting the above technical scheme, the utility model has the following advantages: a blade extending into the airflow gap is provided at the lower end of the stator. When the hair is sucked into the airflow gap along with the air, the blade can block and cut the hair entering the airflow gap. The hair can be cut off when it touches the blade. Compared with the longer hair, the shorter hair is easy to be blown out with the airflow, which prevents the hair from being entangled on the motor shaft, which is beneficial to prevent the motor component from getting stuck and the hair dryer from being overloaded and burned. In addition, the blade can also block part of the hair from entering the gap between the stator and the blade, reduce the accumulation of hair inside the hair dryer, effectively prevent the motor component from getting stuck and causing the hair dryer to burn, reduce the safety risk of use, help to extend the service life of the hair dryer, and improve the user's experience. The blade can also crush other foreign matter, reduce the accumulation of foreign matter, and ensure that the hair dryer is not stuck by foreign matter. Compared with the prior art in which the rotating blade is driven by a motor, the blade of the present application is fixed on the stator, and the blade does not increase the load of the motor component, which can reduce the risk of overloading the motor component and extend the service life of the hair dryer.

[0009] Furthermore, the center of the fan blade is provided with a cylindrical portion extending upward, the blades of the fan blade are arranged on the outside of the cylindrical portion, the upper end surface of the cylindrical portion and the lower end surface of the stator have an outer axial gap, the inner wall of the cylindrical portion and the blade have a radial gap, the bottom surface of the cylindrical portion and the lower end surface of the blade have an inner axial gap, and the outer axial gap, the radial gap and the inner axial gap are connected to form the airflow gap. With the above technical solution, hair can enter the inner axial gap from the outer axial gap through the radial gap, so that the hair contacts the blade, and the blade can block and cut the hair to prevent the hair from being entangled in the motor assembly. The airflow gap is also conducive to adjusting the flow rate and direction of the airflow. By setting the radial gap, a suitable cutting and blocking space is formed, and the friction between the inner wall of the cylindrical portion and the blade can be reduced during mass production, so as to prevent the hair from being entangled too much and burning the hair dryer. In addition, the outer axial gap has the effect of blocking the hair, prompting the hair to contact the blade and be cut, further preventing the hair from being entangled in the motor shaft, and ensuring that the motor assembly of the hair dryer is not stuck.

[0010] Furthermore, the blade extends along the axial direction of the motor assembly and the blade faces radially outward of the motor assembly. By adopting the above-mentioned technical solution, the blade extending along the axial direction of the motor assembly can increase the contact area between the blade and the hair, and can more effectively block and cut the hair flowing into the airflow gap. The axially extended blade can also have a guiding effect on the airflow, which is conducive to the cut hair being blown out with the airflow, reducing the risk of foreign objects such as hair blocking the motor assembly. The blade faces radially outward of the motor assembly, which makes it easier for the blade to contact and cut the hair, and can more effectively capture the hair flowing into the airflow gap, reduce the length of the hair, and reduce the risk of entanglement and blockage. Setting the blade to face radially outward is also convenient for cleaning the hair blocked by the blade and entangled on the blade.

[0011] Furthermore, the lower end of the blade is provided with a blocking portion extending radially outward from the motor assembly, and the blocking portion is higher than the blade to block the hair flowing through the airflow gap, thereby enabling the blade to smoothly cut the blocked hair. With the above technical solution, the height of the blocking portion is higher than the blade, which can form a stronger blocking barrier, effectively blocking the hair flowing into the airflow gap, and by enhancing the blocking effect on the hair, ensuring that the blocked hair is cut by the blade, further reducing the risk of hair entering the airflow gap, reducing the occurrence of damage such as overload or burnout of the motor assembly, and improving the safety of the hair dryer.

[0012] Furthermore, the distance between the center of the motor shaft and the inner wall of the cylindrical part is A1, and the distance from the highest point of the blade blocking part is A2, A2: A1 = 0.5-0.95. The above technical solution is adopted to ensure that foreign matter such as hair is not easy to enter the radial gap, ensure the smoothness of air flow, and the cut hair can be blown out smoothly from the radial gap, optimize the air flow of the hair dryer, reduce the noise and vibration when the hair dryer is used, and improve the user experience. If A2: A1 < 0.5, the radial gap will be too large, and foreign matter such as hair will easily enter the radial gap directly, resulting in the failure of the cutting and blocking function of the blade, and the hair will easily entangle and jam the motor assembly, which may easily cause the hair dryer to overload and burn; if A2: A1 > 0.95, the radial gap will be too small, and the blade will easily rub against the inner wall of the cylindrical part, and the blade cannot smoothly cut the hair. The hair will be entangled and accumulated in the radial gap, which will also cause the hair dryer to burn, and will also cause the airflow to easily form disturbances and vortices when passing through the radial gap, which is not conducive to blowing out the hair, and will also cause the hair dryer to make a lot of noise.

[0013] Furthermore, the distance between the bottom surface of the cylindrical portion and the upper end surface is A3, and the distance between the lower end surface of the blade and the upper end surface of the cylindrical portion is A4, and A4:A3=0.6-0.98. The aforementioned technical solution is adopted to ensure that the blade partially extends into the interior of the fan blade, enhance the blocking effect of the blade, better intercept the hair flowing into the interior of the hair dryer, reduce the risk of hair entering the interior of the hair dryer, and ensure that the hair will not be entangled on the blade. If A4:A3<0.6, the inner axial gap will be too large, and the blade will extend too little into the fan blade, which will not achieve a good hair blocking effect and reduce the effect of the anti-stuck structure; if A4:A3>0.98, the inner axial gap will be too small, and friction will easily occur between the blade and the fan blade during mass production, resulting in overload and burning of the machine.

[0014] Furthermore, the thickness of the blade at the blocking portion is B4, the height of the blocking portion is B3, and B3:B4=0.1-0.95. The above technical solution is adopted to ensure that the blocking portion effectively blocks the hair from entering the airflow gap, so that the blade blocking portion forms an effective blocking barrier to better intercept the hair flowing into the airflow gap; if B3:B4<0.1, the height of the blocking portion is too small and cannot effectively block the hair, which may easily cause the hair to be entangled inside the motor assembly and cause damage to the hair dryer; if B3:B4>0.95, the height of the blocking portion is large, which will occupy a large space and is not convenient for production and installation.

[0015] Furthermore, the blade of the blade has an inclination angle that is lower on the upper side and higher on the lower side. By adopting the above technical solution, the blade can better adapt to the direction of the hair, improve the cutting effect on the hair, and the blade can more effectively cut long hair into small pieces, ensuring that the hair is not easily accumulated in the air flow channel, which can further reduce the entanglement and blockage of the hair inside the hair dryer, extend the service life of the hair dryer, and ensure the safety of users.

[0016] Furthermore, at least four blades are evenly distributed along the circumference of the stator. With the above technical solution, multiple blades can more comprehensively intercept the hair flowing into the motor assembly. By increasing the number of blades, the blocking and cutting points of the blades on the hair can be increased, further reducing the risk of hair entering the hair dryer and improving the anti-hair entanglement effect of the hair dryer.

[0017] Furthermore, the blade is integrally formed with the stator, or fixed to the stator by interference fit, bonding, or welding. The above technical solution can reduce the number of parts, ensure the stability of the blade, and the blade can be more stably fixed on the stator and is not easy to loosen, thereby ensuring the reliability of the blade in blocking and cutting hair.

[0018] The motor shaft is provided with a bearing on the upper side of the fan blade, the inner ring of the bearing is connected to the motor shaft, and the outer ring of the bearing is fixed to the stator. With the above technical solution, the bearing plays a supporting and positioning role between the motor shaft and the stator, and can withstand the radial and axial loads generated when the motor shaft is running, ensuring the stable operation of the motor shaft. The inner ring of the bearing is closely matched with the motor shaft, and the outer ring is fixed to the stator, so that the direct contact and friction between the motor shaft and the stator can be reduced when the motor shaft is running at high speed, which helps to improve the air outlet efficiency of the hair dryer.

[0019] Furthermore, the air inlet is provided with an air inlet grille of a cylindrical structure, and the handle is provided with a support member for supporting the air inlet grille. With the above technical solution, the air inlet grille can play a preliminary role in preventing foreign matter, can initially block foreign matter such as hair, protect the internal components from pollution and damage, reduce the amount of hair entering the motor component, and reduce the load on the blade. The support member provides support and positioning for the air inlet grille, and enhances the stability of the air inlet grille.

[0020] Furthermore, the handle is provided with a filter assembly on the inner side of the air inlet grille. With the above technical solution, the filter assembly can further block foreign matter such as hair from entering the hair dryer, provide an additional protective layer, further prevent the motor assembly from being stuck by hair, and achieve multiple anti-stuck protection.

[0021] Furthermore, the filter assembly includes a support net and a filter, the support net is mounted on a support member, the filter is a cylindrical structure, the inner wall of the filter is supported on the support net and the outer wall is in contact with the inner wall of the air inlet grille. By adopting the above-mentioned technical solution, the filter, the support net and the air inlet grille are combined, which can further enhance the blocking effect on hair and reduce the amount of hair entering the motor assembly. The support member can position the support net to ensure the stability of the filter assembly and the reliability of blocking hair. The filter with a cylindrical structure can better adapt to the inner wall of the air inlet grille, achieve a close fit, further block hair from entering the motor assembly, and help extend the service life of the hair dryer. The air inlet grille, the filter assembly and the blade can block and intercept foreign objects such as hair, forming a multiple anti-hair entanglement structure, achieving multiple anti-stuck protections, and ensuring the normal operation of the motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of a hair dryer for preventing hair entanglement of the utility model;

[0024] Figure 2 A disassembled diagram of a hair dryer to prevent hair tangles;

[0025] Figure 3 This is a disassembled diagram of the motor assembly;

[0026] Figure 4 is a cross-sectional view of a motor assembly;

[0027] Figure 5 This is a bottom view of the stator;

[0028] Figure 6 is a schematic diagram of a blade;

[0029] Figure 7 is a side view of the blade;

[0030] Figure 8 is a top view of the blade;

[0031] Fig. 9 The figure is a schematic diagram of blade installation;

[0032] Fig.10 This is a bottom view of the stator;

[0033] Fig.11 This is a top view of the blade installation. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0035] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0036] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0037] like Figures 1 to 11 As shown, the utility model provides a hair dryer for preventing hair entanglement, including a shell and a motor assembly, the shell including a wind tube 1 extending forward and backward and a handle 2 arranged below the wind tube 1, an air inlet 21 is arranged at the bottom of the handle 2, an air outlet 11 is arranged at the front end of the wind tube 1, an air flow channel is formed between the air inlet 21 and the air outlet 11, the motor assembly is installed in the handle 2 and is located on the upper side of the air inlet 21, the motor assembly includes a stator 31, a rotor 33 with a motor shaft 32, and a fan blade 34 installed at the lower end of the motor shaft 32, an air flow gap extending toward the rotor 33 is formed between the upper side of the fan blade 34 and the lower end of the stator 31, a blade 35 extending into the air flow gap is arranged at the lower end of the stator 31, and the blade 35 blocks and cuts the hair flowing into the air flow gap.

[0038] In this embodiment, when the hair dryer is running, the motor assembly drives the motor shaft 32 to rotate and drives the fan blades 34 to rotate, and a large negative pressure is generated at the air inlet 21 of the hair dryer. Air enters from the air inlet 21, passes through the motor assembly, and is blown out from the air outlet 11 to dry and scatter the hair. In this process, the hair is sucked into the air inlet 21, and part of the hair will enter the air flow gap and entangle on the motor shaft 32, causing the load of the motor assembly to increase, the speed to decrease, and easily cause damage to the hair dryer. Therefore, in this application, a blade 35 extending into the air flow gap is provided at the lower end of the stator 31. When the hair is sucked into the air flow gap along with the air, the blade 35 can block and cut the hair entering the air flow gap. The hair can be cut off when it touches the blade 35. Compared with longer hair, shorter hair is easier to be blown out with the air flow, preventing the hair from being entangled on the motor shaft 32, which is conducive to preventing the motor assembly from getting stuck and preventing the hair dryer from being overloaded and burned. In addition, the blade 35 can also block some hair from entering the gap between the stator 31 and the blade 35, reduce the accumulation of hair inside the hair dryer, effectively prevent the motor assembly from getting stuck and causing the hair dryer to burn, reduce the safety risk of use, help extend the service life of the hair dryer, and improve the user experience. The blade 35 can also crush other foreign matter, reduce the accumulation of foreign matter, and ensure that the hair dryer is not stuck by foreign matter. Compared with the prior art in which the rotating blade is driven by a motor, the blade 35 in this embodiment is fixed on the stator 31, and the blade 35 does not increase the load of the motor assembly, which can reduce the risk of overloading the motor assembly and extend the service life of the hair dryer.

[0039] like Figure 4As shown, after foreign matter enters the air inlet 21, most of the foreign matter will flow along the air flow channel between the air inlet 21 and the air outlet 11 with the air flow, and finally be blown out from the air outlet 11, but some foreign matter will still enter the rotating parts inside the hair dryer, causing the motor load to increase, so a blade 35 is provided to cut hair. In order to ensure the reliability of the blade 35 cutting hair, in one embodiment, a cylindrical portion 341 extending upward is provided at the center of the fan blade 34, and the blades of the fan blade 34 are arranged on the outside of the cylindrical portion 341, and the upper end surface of the cylindrical portion 341 and the lower end surface of the stator 31 have an outer axial gap 342, and the inner wall of the cylindrical portion 341 and the blade 35 have a radial gap 343, and the bottom surface of the cylindrical portion 341 and the lower end surface of the blade 35 have an inner axial gap 344, and the outer axial gap 342, the radial gap 343 and the inner axial gap 344 are connected to form an air flow gap. Hair can enter the inner axial gap 344 from the outer axial gap 342 through the radial gap 343, so that the hair contacts the blade 35. The blade 35 can block and cut the hair to prevent the hair from being entangled in the motor assembly. The airflow gap is also conducive to adjusting the flow rate and direction of the airflow. By setting the radial gap 343, a suitable cutting and blocking space is formed, and the friction between the inner wall of the cylindrical part 341 and the blade 35 can be reduced during mass production, preventing excessive hair entanglement from burning the hair dryer. In addition, the outer axial gap 342 has the effect of blocking the hair, prompting the hair to contact the blade 35 and be cut, further preventing the hair from being entangled in the motor shaft 32, and ensuring that the motor assembly of the hair dryer is not stuck.

[0040] In order to ensure that the blade 35 can smoothly cut the hair, in one embodiment, the blade 35 extends along the axial direction of the motor assembly and the blade faces radially outward of the motor assembly. The axial extension of the blade 35 along the motor assembly can increase the contact area between the blade 35 and the hair, and can more effectively block and cut the hair flowing into the airflow gap. The axially extended blade 35 can also guide the airflow, which is conducive to the hair after cutting being blown out with the airflow, reducing the risk of foreign objects such as hair getting stuck in the motor assembly. The blade faces radially outward of the motor assembly, which makes it easier for the blade to contact and cut the hair, and can more effectively capture the hair flowing into the airflow gap, reduce the length of the hair, and reduce the risk of entanglement and blockage. Setting the blade to face radially outward is also convenient for cleaning the hair blocked by the blade and entangled on the blade.

[0041] like Figures 5 to 10As shown, in order to enable the blade 35 to smoothly cut the hair, in one embodiment, the lower end of the blade 35 is provided with a blocking portion 351 extending radially outward from the motor assembly, and the blocking portion 351 is higher than the blade, so as to block the hair flowing through the airflow gap, thereby enabling the blade 35 to smoothly cut the blocked hair. The blocking portion 351 is higher than the blade, and can form a stronger blocking barrier to effectively block the hair flowing into the airflow gap. By enhancing the blocking effect on the hair, the blocked hair is guaranteed to be cut by the blade 35, further reducing the risk of hair entering the airflow gap, reducing the occurrence of damage such as overload or burnout of the motor assembly, and improving the safety of the hair dryer.

[0042] like Figure 6 As shown, in one embodiment, the distance between the center of the motor shaft 32 and the inner wall of the cylindrical portion 341 is A1, and the distance from the highest point of the blocking portion 351 of the blade 35 is A2, A2:A1=0.5-0.95, for example, A2:A1 can be selected as 0.5, 0.6, 0.7, 0.725, 0.8, 0.9 or 0.95, etc., to ensure that foreign matter such as hair is not easy to enter the radial gap 343, to ensure the smoothness of air flow, the cut hair can be smoothly blown out from the radial gap 343, to optimize the airflow of the hair dryer, to reduce the noise and vibration when the hair dryer is used, and to improve the user experience. If A2:A1<0.5, the radial gap 343 will be too large, and foreign matter such as hair will easily enter the radial gap 343 directly, causing the cutting and blocking functions of the blade 35 to fail. The hair will easily entangle and jam the motor assembly, which may cause the hair dryer to overload and burn. If A2:A1>0.95, the radial gap 343 will be too small, and the blade 35 will easily rub against the inner wall of the cylindrical portion 341. The blade 35 cannot cut the hair smoothly, and the hair will entangle and accumulate in the radial gap 343, which may cause the hair dryer to burn. It will also cause the airflow to easily form disturbances and vortices when passing through the radial gap 343, which is not conducive to blowing out the hair and may also cause the hair dryer to make a lot of noise.

[0043] In one embodiment, the distance between the bottom surface of the cylindrical portion 341 and the upper end surface is A3, and the distance between the lower end surface of the blade 35 and the upper end surface of the cylindrical portion 341 is A4, A4:A3=0.6-0.98; for example, A4:A3 can be selected as 0.6, 0.7, 0.79, 0.8, 0.9 or 0.98, etc., to ensure that the blade 35 partially extends into the interior of the fan blade 34, enhance the blocking effect of the blade 35, better intercept the hair flowing into the hair dryer, reduce the risk of hair entering the hair dryer, and ensure that the hair will not be entangled on the blade 35. If A4:A3<0.6, the inner axial gap 344 will be too large, and the blade 35 will extend too little into the fan blade 34, which will not achieve a good hair blocking effect and reduce the anti-stuck structure effect; if A4:A3>0.98, the inner axial gap 344 will be too small, and friction between the blade 35 and the fan blade 34 will be easily generated during mass production, resulting in overload and burning.

[0044] In order to ensure that the blade 35 can block the hair, in one embodiment, the thickness of the blade 35 at the blocking portion 351 is B4, the height of the blocking portion 351 is B3, B3:B4=0.1-0.95, for example, B3:B4 can be selected as 0.1, 0.2, 0.3, 0,4, 0.5, 0.525, 0.6, 0.7, 0.8, 0.9 or 0.95, etc., to ensure that the blocking portion 351 effectively blocks the hair from entering the airflow gap, so that the blocking portion 351 of the blade 35 forms an effective blocking barrier to better intercept the hair flowing into the airflow gap; if B3:B4<0.1, the height of the blocking portion 351 is too small to effectively block the hair, which may easily cause the hair to be entangled in the motor assembly and cause damage to the hair dryer; if B3:B4>0.95, the height of the blocking portion 351 is large, which will occupy a large space and is not convenient for production and installation.

[0045] In order to further ensure the cutting effect of the blade 35, in one embodiment, the blade 35 has an inclination angle that is low on the upper side and high on the lower side, so that the blade 35 can better adapt to the direction of the hair and improve the cutting effect on the hair. The blade 35 can more effectively cut longer hair into small sections, ensuring that the hair is not easily accumulated in the air flow channel, which can further reduce the entanglement and blockage of the hair inside the hair dryer, extend the service life of the hair dryer, and ensure the safety of the user.

[0046] The inclination angle B1 of the blade 35 is 1°-90°, for example, B1 can be 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° or 90°, etc. When the hair is entangled, it is not easy to continue to move into the motor assembly. The hair moves upward under the negative pressure, which can increase the cutting effect of the blade 35, cut the longer hair into shorter hair segments, and reduce hair accumulation. If B1 is less than 1°, the hair moves upward more slowly, resulting in a poor cutting effect of the blade 35; if B1 is greater than 90°, the angle between the hair and the blade 35 is too small, and the blade 35 is not easy to cut the hair.

[0047] In order to enhance the cutting effect of the blades 35 on the hair, in one embodiment, at least four blades 35 are evenly distributed along the circumference of the stator 31. Multiple blades 35 can more comprehensively intercept the hair flowing into the motor assembly. By increasing the number of blades 35, the blocking and cutting points of the blades 35 on the hair can be increased, further reducing the risk of hair entering the hair dryer, and improving the anti-hair entanglement effect of the hair dryer.

[0048] like Fig.11 As shown, in one embodiment, the circumferential angle W of the blade 35 is adjustable and can be adjusted according to the rotation direction of the fan blade 34 and the specific structure inside the handle 2 to select the most favorable cutting angle.

[0049] In order to ensure the stability of the blade 35, in one embodiment, the blade 35 is integrally formed with the stator 31, or is fixed to the stator 31 by interference fit, or is bonded, or is welded, which can reduce the number of parts and ensure the stability of the blade 35. The blade 35 can be more stably fixed on the stator 31 and is not easy to loosen, thereby ensuring the reliability of the blade 35 in blocking and cutting hair.

[0050] In order to ensure the stability of the operation of the fan blade 34, in one embodiment, the motor shaft 32 is equipped with a bearing 36 on the upper side of the fan blade 34, the inner ring of the bearing 36 is connected to the motor shaft 32, and the outer ring of the bearing 36 is fixed on the stator 31. The bearing 36 plays a supporting and positioning role between the motor shaft 32 and the stator 31, and can withstand the radial and axial loads generated when the motor shaft 32 is running, ensuring the stable operation of the motor shaft 32. The inner ring of the bearing 36 is closely matched with the motor shaft 32, and the outer ring is fixed on the stator 31, so that the direct contact and friction between the motor shaft 32 and the stator 31 can be reduced when the motor shaft 32 is running at high speed, which helps to improve the air outlet efficiency of the hair dryer.

[0051] In order to achieve preliminary hair entanglement prevention, in one embodiment, the air inlet 21 is provided with an air inlet grille 211 of a cylindrical structure, and the handle 2 is provided with a support member 212 for supporting the air inlet grille 211. The air inlet grille 211 can play a preliminary foreign body prevention role, can initially block foreign bodies such as hair, protect the internal components from pollution and damage, reduce the hair entering the motor component, and reduce the load on the blade 35. The support member 212 provides support and positioning for the air inlet grille 211, and enhances the stability of the air inlet grille 211.

[0052] In order to further prevent hair from getting tangled, in one embodiment, the handle 2 is provided with a filter assembly on the inner side of the air inlet grille 211. The filter assembly can further prevent foreign matter such as hair from entering the hair dryer, provide an additional layer of protection, further prevent the motor assembly from being stuck by hair, and achieve multiple anti-stuck protection.

[0053] Among them, the filter assembly includes a support net 22 and a filter 23, the support net 22 is installed on the support member 212, the filter 23 is a cylindrical structure, the inner wall of the filter 23 is supported by the support net 22 and the outer wall is in contact with the inner wall of the air inlet grille 211. The combination of the filter 23, the support net 22 and the air inlet grille 211 can further enhance the blocking effect on the hair and reduce the hair entering the motor assembly. The support member 212 can position the support net 22 to ensure the stability of the filter assembly and the reliability of blocking the hair. The filter 23 with a cylindrical structure can better adapt to the inner wall of the air inlet grille 211, achieve a close fit, further block the hair from entering the motor assembly, and help extend the service life of the hair dryer. Through the above embodiment, the air inlet grille 211, the filter assembly and the blade 35 can block and intercept foreign objects such as hair, form a multiple anti-hair winding structure, achieve multiple anti-stuck protection, and ensure that the motor assembly can operate normally.

[0054] A cable 25 is also provided at the bottom of the handle for connecting to an external power source.

[0055] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A hair dryer for preventing hair from tangling, comprising a housing and a motor assembly, wherein the housing comprises a wind tube extending forward and backward and a handle arranged below the wind tube, an air inlet is arranged at the bottom of the handle, an air outlet is arranged at the front end of the wind tube, an air flow channel is formed between the air inlet and the air outlet, the motor assembly is installed in the handle and located above the air inlet, the motor assembly comprises a stator, a rotor having a motor shaft, and a fan blade installed at the lower end of the motor shaft, wherein: An airflow gap extending toward the rotor is formed between the upper side of the fan blade and the lower end of the stator. A blade extending into the airflow gap is provided at the lower end of the stator. The blade blocks and cuts the hair flowing into the airflow gap.

2. The hair dryer for preventing hair tangle according to claim 1, characterized in that: A cylindrical portion extending upward is provided at the center of the fan blade, and the blades of the fan blade are provided on the outside of the cylindrical portion. An outer axial gap is provided between the upper end surface of the cylindrical portion and the lower end surface of the stator, a radial gap is provided between the inner wall of the cylindrical portion and the blade, and an inner axial gap is provided between the bottom surface of the cylindrical portion and the lower end surface of the blade. The outer axial gap, the radial gap and the inner axial gap are connected to form the airflow gap.

3. The hair dryer for preventing hair tangle according to claim 2, characterized in that: The blade extends in the axial direction of the motor assembly, and the blade edge faces the radial outer side of the motor assembly.

4. The hair dryer for preventing hair tangle according to claim 3, characterized in that: The lower end of the blade is provided with a blocking portion extending radially outwardly of the motor assembly, and the blocking portion is higher than the blade edge and is used for blocking the hair flowing through the air flow gap.

5. The hair dryer for preventing hair tangle according to claim 4, characterized in that: The distance between the center of the motor shaft and the inner wall of the cylindrical portion is A1, and the distance between the center of the motor shaft and the highest point of the blade blocking portion is A2, A2:A1=0.5-0.95; and / or, the distance between the bottom surface of the cylindrical portion and the upper end surface is A3, and the distance between the lower end surface of the blade and the upper end surface of the cylindrical portion is A4, A4:A3=0.6-0.98; and / or, the thickness of the blade at the blocking portion is B4, and the height of the blocking portion is B3, B3:B4=0.1-0.

95.

6. The hair dryer for preventing hair tangle according to claim 3, characterized in that: The blade edge of the blade has an inclination angle that is lower on the upper side and higher on the lower side; and / or, at least four blades are evenly distributed along the circumference of the stator.

7. The hair dryer for preventing hair tangle according to claim 1, characterized in that: The blade is integrally formed with the stator, or fixed to the stator by interference fit, bonding, or welding; and / or, the motor shaft is provided with a bearing on the upper side of the fan blade, the inner ring of the bearing is connected to the motor shaft, and the outer ring of the bearing is fixed to the stator.

8. The hair dryer for preventing hair tangle according to claim 1, characterized in that: The air inlet is provided with an air inlet grille of a cylindrical structure, and the handle is provided with a supporting member for supporting the air inlet grille.

9. The hair dryer for preventing hair tangle according to claim 8, characterized in that: The handle is provided with a filter assembly on the inner side of the air inlet grille.

10. The hair dryer for preventing hair tangle according to claim 9, characterized in that: The filter assembly includes a supporting net and a filter, wherein the supporting net is installed on a supporting member, and the filter is a cylindrical structure, wherein the inner wall of the filter is supported on the supporting net and the outer wall is in contact with the inner wall of the air inlet grille.

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