CN111893934A

CN111893934A - Hair drier

Info

Publication number: CN111893934A
Application number: CN201910368368.6A
Authority: CN
Inventors: 刘天亮; 杨青松; 徐谦
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd; Nanjing Deshuo Industrial Co Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-11-06

Abstract

The invention provides a hair dryer, comprising: a housing assembly including a duct formed with an airflow passage; a main fan disposed inside the duct; the motor is arranged in the duct and used for driving the main fan to rotate so as to generate working airflow in the airflow channel; the hair drier comprises a motor support part for supporting and installing the motor in the duct of the hair drier, the support frame comprises a containing shell for containing the motor and a connecting part for connecting the containing shell and the duct, the containing shell comprises a first end cover part close to an air inlet of the duct, the first end cover part is provided with an outer ventilation opening which penetrates through the first end cover part along a first direction and also penetrates through the first end cover part along a second direction, and the second direction is obliquely intersected with the first direction or is perpendicular to the first direction. The invention provides a hair drier which improves the heat dissipation performance and can effectively reduce the temperature rise.

Description

Hair drier

Technical Field

The invention relates to an electric tool, in particular to a hair drier.

Background

A blower is a garden tool that a user can operate to blow grass clippings, leaves, etc. to sweep a garden or garden. The performance of the hair dryer is closely related to the motor inside the hair dryer, so that the heat dissipation efficiency of the motor of the hair dryer is improved, and the working performance of the hair dryer can be effectively improved. The motor of the blower is usually installed inside the blower duct, and the air flow generated in the duct by the operation of the blower dissipates heat to the motor, so as to improve the heat dissipation efficiency of the motor. The motor design of traditional hair-dryer fails to cooperate well with the hair-dryer structure, can not effectively utilize the duct air current of hair-dryer to be unfavorable for reducing the temperature rise of motor, restricted the promotion of the operational property of hair-dryer.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention mainly aims to provide a hair drier which can improve the heat dissipation performance and effectively reduce the temperature rise. In order to achieve the above main object, the present invention provides a hair dryer including:

the shell assembly comprises a duct, an air inlet and an air outlet, wherein the duct is provided with an air inlet allowing air to enter the air flow channel at one end, and the air outlet allowing air to flow out of the air flow channel at the other end; a main fan disposed inside the duct; the motor is arranged in the duct and used for driving the main fan to rotate so as to generate working airflow in the airflow channel; the hair drier comprises a motor support part for supporting and installing the motor in the duct of the hair drier, the support frame comprises a containing shell for containing the motor and a connecting part for connecting the containing shell and the duct, the containing shell comprises a first end cover part close to an air inlet of the duct, the first end cover part is provided with an outer ventilation opening which penetrates through the first end cover part along a first direction and also penetrates through the first end cover part along a second direction, and the second direction is obliquely intersected with the first direction or is perpendicular to the first direction.

Optionally, the second end cover portion includes an end cover surface facing the duct air inlet, and at least one side wall surface interfacing with the end cover surface, a first outer vent hole penetrating through is formed on the end cover surface, and a second outer vent hole penetrating through is also formed on the at least one side wall surface.

Optionally, the first outer vent opening in the end cap face is in communication with the second outer vent opening in the at least one side wall face.

Optionally, the motor includes a motor shaft capable of rotating around a first axis; an outer rotor case surrounding the motor shaft; the stator iron core is at least partially arranged in the outer rotor shell; a stator end cover including a second end cover portion at least partially located at one end of the outer rotor case in an axial direction, the first direction being parallel to the first axis, the second direction being perpendicular to the first axis.

Optionally, the motor includes a motor shaft capable of rotating around a first axis; an outer rotor case surrounding the motor shaft; the stator iron core is at least partially arranged in the outer rotor shell; a stator end cover including a second end cover portion located at least partially at one end of the outer rotor case in an axial direction; the first direction and the second direction are intersected to form an included angle with an angle value interval of 30-120 degrees.

Optionally, the second end cap portion is formed with an inner vent penetrating through the second end cap portion in the first direction and also penetrating through the second end cap portion in the second direction, the inner vent communicates with the outer vent, the second end cap portion has at least two first support portions, and the outer vent is formed between two adjacent first support portions.

Optionally, the motor support comprises a second support part for connecting with the first support part to mount the motor to the motor support; the projection of the second support in a plane perpendicular to the first axis is located outside the projection of the inner vent in that plane.

Optionally, the blower further comprises a connector for connecting the first support and the second support, a projection of the connector in the plane perpendicular to the first axis being outside a projection of the inner vent in the plane.

Optionally, the motor supporting part is formed with an accommodating cavity for accommodating the motor, the motor supporting part is disposed in the airflow channel, and two ends of the accommodating cavity along the first axis are open; the motor support piece comprises guide vanes corresponding to the number of the first support parts, the guide vanes are connected with the motor support piece to the shell assembly, and part of the guide vanes extend to be connected with the second support parts.

Optionally, the ratio of the area of the projection of the outer vent in a plane perpendicular to the first axis to the area of the projection of the first end cap portion in that plane is greater than 20%.

Optionally, a ratio of a height of the outer vent in the first direction to a height of the first end cap portion in the first direction is 30% less than 90%.

Optionally, the motor further includes a rotor end cover, and the rotor end cover is formed with rotor blades and is driven by the outer rotor casing to rotate to generate heat dissipation airflow.

Optionally, an outer edge of a projection of the outer rotor casing in a plane perpendicular to the first axis is circular, and projections of the first end cap portion and the second end cap portion in the plane are located in the circle.

An outer vent which penetrates through the first end cover part along a first direction and also penetrates through the first end cover part along a second direction is formed in the first end cover part of the motor of the blower, and an inner vent which penetrates through the second end cover part along the first direction and also penetrates through the second end cover part along the second direction is formed in the second end cover part of the motor of the electric tool, so that air flow in the motor can respectively flow out from the first direction and the second direction, the volumes of the inner vent and the outer vent are increased, and heat dissipation is performed by utilizing the air flow in the electric tool; the invention strengthens the internal structure of the hair drier, thereby prolonging the service life and the performance of the hair drier, improving the heat dissipation performance of the hair drier and effectively reducing the temperature rise.

Drawings

Fig. 1 is a schematic perspective view of a blower according to a first embodiment.

Figure 2 is a schematic plan view of the blower of figure 1.

Figure 3 is a cross-sectional view of the blower of figure 1.

Fig. 4 is a cross-sectional view of the motor support and motor of fig. 3.

Fig. 5 is a perspective view of the motor supporter and the motor of fig. 3.

Fig. 6 is a rear view of the motor support and motor of fig. 3.

Fig. 7 is a perspective view of the motor of fig. 3.

Fig. 8 is an exploded view of the motor of fig. 7.

Figure 9 is a schematic view of the structure of the motor support of the blower of figure 1.

Fig. 9A is a partially enlarged view of the first end cap portion in fig. 9.

Fig. 10 is a perspective view of the motor of fig. 7 from another angle.

Figure 11 is a schematic view of the internal airflow of the blower of figure 1.

Fig. 12 is a schematic structural view of a stator end cover of a motor according to another embodiment.

Figure 13 is a schematic view of the structure of the motor support of the hair dryer of the second embodiment.

Fig. 13A is a partially enlarged view of the first end cap portion in fig. 13.

Figure 14 is an end side view of a blower of a second embodiment.

Figure 15 is an internal air flow profile for a blower incorporating the present invention.

Detailed Description

The invention is described in detail below with reference to the following figures and detailed description.

Figure 2 is a schematic plan view of the blower of figure 1. Figure 3 is a cross-sectional view of the blower of figure 1.

Referring to fig. 1 to 3, the present invention provides an electric tool, and more particularly, a blower 100, wherein the blower 100 is used as a garden electric tool for blowing debris, leaves, etc. to perform cleaning work. The blower 100 includes a housing assembly 110, a motor 200, and a main fan 120, and the motor 200 generates power to rotate the main fan 120 to generate a high flow rate of air to sweep debris.

The hair dryer comprises a duct 150 formed with an airflow passage 112, wherein an air inlet 113 allowing airflow into the airflow passage is provided at one end of the duct 150, and an air outlet 114 allowing airflow out of the airflow passage is provided at the other end of the duct; a main fan 120 disposed inside the duct 150; the housing assembly 110 includes a housing body 111, an airflow channel 112 formed inside the housing body 111, and an air inlet 113 disposed opposite to an air outlet 114. Preferably, the main fan 120 is disposed in the airflow passage 112. The main fan 120 is connected to the motor 200 and driven by the motor 200 to generate a high-speed airflow entering the airflow channel 112 from the air inlet 113 and flowing out from the air outlet 114. During operation, the user operates the blower 100 to face the outlet 114 to an area to be cleaned to perform a cleaning operation.

The blower 100 further includes a grip 115 for a user to hold, the grip 115 is formed on the housing assembly 110 and extends to form a handle for the user to hold, and the user controls the operation direction of the blower 100 by operating the grip 115. The holding portion 115 is disposed at the housing assembly 110 and close to the air inlet 113 relative to the air outlet 114, so that the blower 100 has a certain length of the body, which is convenient for a user to operate the blower 100 and clean the ground far away.

The blower 100 further includes a mesh enclosure 140 disposed at the air inlet 113, and the mesh enclosure 140 is a mesh-shaped intercepting device having a plurality of through holes and is used for isolating garbage from entering the blower 100 through the air inlet 113, so as to affect the operation performance of the blower 100. Meanwhile, the mesh enclosure 140 allows the blowing air to uniformly enter the air flow passage 112, reducing air turbulence generated by the air flow passage 112 in the hair dryer 100. Further, the mesh enclosure 140 is used to protect the user, prevent the user from accidentally touching the internal structure of the hair dryer 100, and improve the overall safety of the hair dryer 100.

The hair dryer 100 further comprises an energy source device, preferably at least one battery pack, and a switch for controlling the activation of the energy source device, and a control unit for controlling the operation of the hair dryer 100, which is embodied as a circuit board, which is fixed by the housing assembly 110 and which controls the motor 200. The control unit controls the motor 200 to operate to drive the blower 100 to operate according to the control of the switch by the user. Preferably, the battery pack is detachably mounted in the hair dryer 100, and the user can detach the battery pack to charge it separately, or can charge the battery pack by charging the hair dryer 100. Meanwhile, the battery pack is also matched with other electric tools, has higher compatibility and can be connected with other electric tools and supply power.

Fig. 4 is a cross-sectional view of the motor support and motor of fig. 3. It is understood that blower 100 generally employs external rotor motor 200 as its driving motor, so the present invention is described by taking external rotor structure as an example, and as shown in fig. 4, motor 200 includes rotor assembly 220 and stator assembly 230, and the rotating magnetic field is generated by stator assembly 230 and acts on rotor assembly 220 to form torque. Meanwhile, the rotor assembly 220 is used to pack and fix the motor 200, and the stator assembly 230 is formed inside the rotor assembly 220. The rotor assembly 220 further includes a motor shaft 240, the rotor assembly 220 and the stator assembly 230 are sleeved on the motor shaft 240, and the motor shaft 240 and the rotor assembly 220 are fixedly connected, such that the motor shaft 240 is driven by the rotor assembly 220 to rotate. Specifically, the motor shaft 240 is rotatable about the first axis 300.

Fig. 5 is a perspective view of the motor supporter and the motor of fig. 3.

Fig. 6 is a rear view of the motor support and motor of fig. 3. As shown in fig. 4-6, blower 100 further includes a motor support 210 for mounting components of motor 200 and directing airflow within airflow path 112. Rotor assembly 220 and stator assembly 230 are installed into motor support 210, protecting its internal components and providing a dust-proof effect by motor support 210. Correspondingly, the housing assembly 110 includes a housing motor support 117 for mounting the motor, and the housing motor support 117 is fixedly connected with the motor support 210 to support the motor 200.

Fig. 7 is a perspective view of the motor of fig. 3. Fig. 8 is an exploded view of the motor of fig. 7.

The rotor assembly 220 includes an outer rotor case 221 and a rotor cover 223 formed at one end portion of the outer rotor case 221, the outer rotor case 221 forms a main body portion of the outer rotor assembly 220, and the stator assembly 230 includes a stator cover 222 provided at the other end portion of the outer rotor case 221. The outer rotor shell 221 is a cylindrical sleeve and has an outer rotor inner wall, a mounting cavity enclosed by the shell inner wall is formed in the hollow inside of the outer rotor shell 221, the mounting cavity is used for mounting the stator assembly 230, and the mounting cavity is packaged through the matching of the rotor end cover 223 and the stator end cover 222 with the outer rotor shell 221 so as to fix and protect the stator assembly 230 inside the outer rotor shell 221. The rotor assembly 220 further comprises magnetic steel punching sheets, and the magnetic steel punching sheets are sequentially fixed on the inner wall of the outer rotor.

Stator assembly 230 is relatively installed in rotor assembly 220, and stator assembly 230 includes stator core 231 and stator winding 232, and stator core 231 includes the iron core axis body and connects in a plurality of wire winding supports of iron core axis body, the inside cavity of iron core axis body forms the through-hole, and this through-hole supplies motor shaft 240 to pass so that stator assembly 230 cup joints with motor shaft 240. A plurality of winding support one end is connected in the iron core axis body to radially extend all around from the iron core axis body, stator winding 232 twines in the winding support, and encircles motor shaft 240 along with the relation that the winding support encircles motor shaft 240.

Preferably, the stator assembly 230 further includes an insulating support 233, the insulating support 233 being used to insulate the stator core 231 and the stator winding 232; the insulating holder 233 includes an insulating shaft body, which is hollow to form a through hole therein for the motor shaft 240 to pass through, and the insulating holder 233, corresponding to the stator core 231. One end of the insulating support 233 is connected to the insulating shaft body and extends from the insulating shaft body radially to the periphery, the arrangement of the insulating support 233 is matched with the winding support, the stator core 231 can be installed on the insulating support 233 and is isolated from the stator winding 232 by the insulating support 233 by the stator core 231 after being installed on the insulating support 233, and therefore the purpose of insulating the stator core 231 and the stator winding 232 is achieved. It is understood that insulation may also be provided between the stator winding 232 and the stator core 231 by providing an insulating material, which is not limited herein.

Preferably, the rotor end cover 223 is implemented as a rotor fan including an end cover ring, which is preferably circular ring shaped to match the outer rotor housing 221, thereby enclosing the outer rotor housing 221, a fan shaft, and fan blades. The fan shaft is formed at the center of the rotor fan and has a through hole through which the motor shaft 240 passes. The fan blades are formed between the end cover ring and the fan shaft, are radial by taking the fan shaft as a center, and are connected and fixed by the end cover ring and the fan shaft.

The end cover ring is fixedly connected with the outer rotor shell 221, preferably, the edge of the end cover ring at the joint of the end cover ring and the outer rotor shell 221 is provided with a tooth piece, and the outer rotor shell 221 is provided with a tooth groove in a matching manner, so that the connection relation between the end cover ring and the outer rotor shell 221 is increased through clamping. It should be noted that the rotor cover 223 may also be connected to the outer rotor casing 221 by bonding, welding, or the like. In another possible embodiment, rotor cover 223 and outer rotor casing 221 are integrally formed by molding or the like, so that rotor cover 223 and outer rotor casing 221 are integrally connected. During the operation of the motor 200, the rotor assembly 220 rotates and drives the rotor cover 223 fixedly connected thereto to rotate therewith, and the rotor cover 223 implemented as a fan generates an air flow to blow toward the inside of the motor 200, so as to dissipate heat from the stator assembly 230 and the rotor assembly 220 inside the motor 200, thereby optimizing the performance of the motor 200.

The stator end cover 222 includes a second end cover portion 2220 located at least partially at one end of the outer rotor case in the axial direction; the stator end cover 222 extends to form a first surface 2221 and a second surface 2222 which are oppositely connected, the second surface 2222 is preferably annular and matched with the outer rotor shell 221, the first surface 2221 is formed on one side of the second surface 2222 to form an end face so as to enclose the outer rotor shell 221 through the stator end cover 222, and the second end cover portion 2220 is formed on the first surface. The stator end cover 222 includes a mounting shaft 2223 having a mounting shaft through hole therein, the mounting shaft through hole making the mounting shaft 2223 hollow inside for receiving the motor shaft 240. Further, the stator assembly further includes a bearing 250, the bearing 250 is disposed between the mounting shaft 2223 and the motor shaft 240 for supporting and limiting the motor shaft 240, and preventing relative rotation between the stator cover 222 and the motor shaft 240. Thus, during operation of motor 200, rotor assembly 220 rotates and carries rotor end cap 223 into rotation, while stator end cap 222 is not carried into rotation.

The mounting shaft 2223 is used for mounting the stator end cover 222 into the iron core shaft, the size of the mounting shaft 2223 is matched with that of the iron core shaft, the mounting shaft 2223 is placed into the through hole in the iron core shaft, and the mounting shaft 2223 is fixedly connected with the iron core shaft in a threaded, screwed, interference fit, welding mode and the like, so that the stator end cover 222 is connected with and supports the stator assembly 230. It is understood that the stator end cover 222 and the stator assembly 230 may be connected by other connection methods than the mounting shaft 2223 connection, such as direct screw connection, and will not be described in detail herein.

Fig. 10 is a perspective view of the motor of fig. 7 from another angle. The second end cap portion 2220 is formed with an inner vent penetrating the second end cap portion 2220 in a first direction 301 and also penetrating the second end cap portion 2220 in a second direction 302, the second direction 302 being obliquely intersected with or perpendicular to the first direction 301. The first direction 301 is perpendicular to the first surface, and the second direction 302 is perpendicular to the second surface, so that the first surface 2221 of the stator end cover 222 includes at least a first support portion 2223 and has inner vents 2224 formed at both sides of the first support portion 2223, and the stator assembly 230 is supported by the first support portion 2223 and encapsulates the outer rotor housing 221.

Figure 9 is a schematic view of the structure of the motor support of the blower of figure 1. Fig. 9A is a partially enlarged view of the first end cap portion in fig. 9. The hair dryer comprises a motor support 210 for supporting and mounting the motor 200 in the duct 150 of the hair dryer, the support comprises a housing 211 for receiving the motor and a coupling for coupling the housing 211 with the duct, the housing comprises a first end cover portion 2111 near the air inlet of the duct 150, the first end cover portion 2111 is formed with an outer vent 214 penetrating the first end cover portion 2111 in a first direction and also penetrating the first end cover portion 2111 in a second direction, and the second direction 302 is obliquely intersected with or perpendicular to the first direction 301.

The inner vent 2224 and the outer vent 214 are communicated and matched to form a vent 304, the vent 304 is partially formed on the first surface 2221 to form a first vent portion 2225, and is partially formed on the second surface 2222 to form a second vent portion 2226, the first vent portions 2225 are opposite to each other to form two sides of the first supporting portion 2223, and the second vent portions 2226 are communicated with the first vent portions 2225 and extend to the second surface 2222.

Preferably, the size of the outer vent 214 is larger than that of the inner vent 2224, and the outer vent 214 is matched in position, so that the inner vent 2224 is completely exposed to the outer vent 214, and the first end cover portion 2111 does not shield the second end cover portion 2220, so that the outer vent 214 can effectively increase the size of the vent of the motor 200, and thus the overall heat dissipation efficiency of the motor is increased.

The motor support 210 includes a receiving case 21, and a first end cover portion 2111 formed at one end of the receiving case 21, the first end cover portion 2111 being overlapped with and fixedly coupled to a second end cover portion 2220 of the stator cover 222. The first end cover portion 2111 conforms to the first surface 2221 of the stator end cover, and includes second support portions 2112 corresponding to the number of the first support portions 2223. An inner vent hole is formed in the first end cap portion 2111, and an inner vent hole 2224 penetrating the second end cap portion in the first direction 301 and also penetrating the second end cap portion in the second direction 302 is formed in the first end cap portion, and the second direction is obliquely intersected with or perpendicular to the first direction. Preferably, in order to prevent the motor support 210 from affecting the size of the vent 304 and reducing the heat dissipation performance, the size of the second support portion 2112 is set to be equal to or smaller than the size of the first support portion 2223, so that the vent 304 is not shielded to reduce the ventilation area and reduce the heat dissipation performance. The second end cover part comprises an end cover surface facing the duct air inlet and at least one side wall surface connected with the end cover surface, a first through ventilation part 2225 is formed on the end cover surface, and a second through ventilation part 2226 is also formed on the at least one side wall surface.

The second end cover portion 2220 has at least two first support portions 2223, and the inner vent is formed between the adjacent two first support portions 2223. The ratio of the area of the projection of the inner vent in a plane perpendicular to the first axis 300 to the area of the projection of the second endcap portion 2220 in the plane is greater than 20%, and specifically, the area of the projection of the second endcap portion 2220 in the plane refers to the area of the projection of the area defined by the periphery of the second endcap portion 2220 in the plane perpendicular to the first axis 300. The ratio of the height L1 of the inner vent in the first direction 301 to the height L2 of the second endcap portion 2220 in the first direction 301 is 30% less than 90%.

The bottom edge of the second surface 2222 of the stator end cover 222 corresponds to the bottom edge shape of the outer rotor shell 221, so that the stator end cover 222 can enclose the outer rotor shell 221. The first support portion 2223 extends from the first surface 2221 to the second surface 2222, and is abutted with the outer rotor housing 221 at the second surface 2222, so that the stator end cover 222 encloses the outer rotor housing 221 and its internal components.

The inner vent 304 is used for ventilation and heat dissipation of the motor 200, and the rotor end cover 223 generates airflow in the operation process of the motor 200, the airflow flows through the inside of the motor 200, flows to the stator end cover 222, and is discharged to the outside through the inner vent 304, so that the heat dissipation efficiency of the inside of the motor 200 is improved, the stator end cover 222 supports the stator assembly 230, meanwhile, the obstruction of the stator end cover 222 on heat dissipation is reduced, and the performance of the motor 200 is effectively optimized. Further, in order to improve the heat dissipation efficiency, the rotor cover 223 and the stator cover 222 are made of a material with high thermal conductivity, and preferably, an aluminum material is used as a material for making the rotor cover 223 and the stator cover 222, which is low in cost and has a good heat dissipation effect.

Preferably, the first support portions 2223 are provided in three numbers and symmetrically distributed centering on the mounting shaft 2223, and correspondingly, three inner vents 2224 are formed between the first support portions 2223, so that the first support portions 2223 and the inner vents 2224 are arranged alternately two by two. The first supporting portions 2223 are connected to each other two by two, and the joint of the two first supporting portions 2223 is recessed toward the mounting shaft 2223, so that the area of the inner vent 2224 is increased to optimize the heat dissipation effect. At this time, the stator end covers 222 are distributed in a "Y" shape, and the symmetrical structure of the stator end covers can increase the size of the inner ventilation opening 2224 and ensure the strength of the stator end covers 222, so that the stator end covers 222 can stably support the structure of the motor 200. Alternatively, the first support portions 2223 may be asymmetrically distributed, and the corresponding inner vents 2224 with different areas are separated by the first support portions 2223.

Further, a first inner vent opening in the end cap face is in communication with a second inner vent opening in the at least one side wall face. The outer vent and the inner vent form a ventilation portion, and the outer vent and the inner vent are communicated, so that gas inside the motor 200 can be emitted through the ventilation portion.

The projection of the second support 2112 in a plane perpendicular to the first axis 300 is outside the projection of the inner vent 2224 in that plane. That is, the projection of the second support portion 2112 does not overlap the projection of the inner vent, so that the gas in the gas flow path is not intercepted by the second support portion 2112 when flowing out of the inner vent 2224, thereby improving the gas flow discharge efficiency of the gas flow path. The projection of the connector in the plane perpendicular to the first axis 300 is outside the projection of the inner vent 2224 in that plane. That is, the projection of the connection member 260 in the plane perpendicular to the first axis 300 does not overlap the projection of the inner vent 2224 in the plane, so that the gas in the gas flow path 112 flows out of the inner vent without being intercepted by the second support portion 2112, thereby improving the gas flow discharge efficiency of the gas flow path 112.

Further, each of the inner vents extends to the edge of the stator end cover 222, thereby increasing the area of the inner vent.

The projection of the connecting piece in the plane perpendicular to the first axis is located outside the projection of the inner vent in the plane and inside the projection of the outer rotor housing 211 in the plane, so that the connecting piece 260 does not affect the heat dissipation of the motor and does not affect the air flow generated by the blower.

Preferably, the motor 200 includes a connection member 260 for connecting the first end cover portion 2111 and the stator cover 222, and preferably, the connection member 260 is implemented as a screw, in which case the stator cover 222 and the first end cover portion 2111 are provided with corresponding screw holes, and the stator cover 222 and the first end cover portion 2111 are fixed by the screw connection. It is understood that the stator cover 222 and the first end cover portion 2111 can also be fixed by clamping, welding, etc., and will not be described in detail herein. Through setting up connecting piece 260 through first supporting part 2223 and second supporting part 2112 lug connection to need not extra coupling assembling or the connection casing that presets to supply motor 200 and motor support piece 210 to connect, make first supporting part 2223 and second supporting part 2112 outside playing support and encapsulation motor 200 and motor support piece 210, still have the fixed effect of connection, thereby promoted the life of hair-dryer, the structure of motor 200 has been optimized, and the influence degree of connecting piece 260 to the ventilation that dispels the heat of motor 200 has been reduced.

It will be appreciated that the respective first support portions 2223 are preferably integrally connected to each other to reinforce the strength of the stator end cover 222 and to create a corresponding mounting shaft through hole at the connection center thereof. The second support portions 2112 are preferably integrally connected to each other. Further, the first support portions 2223 may be independent from each other and extend from the mounting shaft through hole to the periphery, and the second support portions 2112 may be similar to each other.

When the first supporting portions 2223 are provided in three, the corresponding second supporting portions 2112 are also provided in three, and in order to ensure the stability and the connection strength of the connection between the end cover housing and the stator end cover 222, the connecting members 260 are also provided in three at this time, so that when the first supporting portions 2223 and the second supporting portions 2112 are overlapped, the corresponding first supporting portions 2223 and the second supporting portions 2112 are fixedly connected by the connecting members 260.

The motor support 210 is formed with a receiving cavity 213 for receiving the motor 200, the motor support 210 is disposed in the airflow passage 112, and both ends of the receiving cavity 213 along the first axis 300 are opened. The motor support 210 further has an external air inlet formed at one end of the accommodating member 213 and disposed in the middle of the air flow passage, and when the rotor fan operates, air is introduced from the external air inlet of the motor support 210 and flows toward the stator cover 222 to dissipate heat of the motor 200. For convenience of installation, the preferred motor support member 210 includes a first motor support member and a second motor support member, and in the process of manufacturing and installing the motor 200, the motor 200 is inserted into the motor support member 210, the stator cover 222 and the first end cover portion 2111 are connected and fixed by the connecting member 260, and then the first motor support member and the second motor support member are connected by clamping or welding, so as to complete installation of the motor support member 210 of the motor 200.

Preferably, the outer edge of the projection of the outer rotor housing 221 in a plane perpendicular to the first axis 300 is circular, and the projection of the stator cover 222 in the plane is located in the circle.

It will be appreciated that the motor 200 and housing assembly 110 configurations described above may be applied to blowers other than blower 100 and form the basic structure of the blower.

Optionally, the second end cover portion includes an end cover surface facing the duct air inlet, and at least one side wall surface interfacing with the end cover surface, a first outer vent hole penetrating through is formed on the end cover surface, and a second outer vent hole penetrating through is also formed on the at least one side wall surface. The first outer vent opening in the end cap face is in communication with the second outer vent opening in the at least one side wall face.

Further, the motor support 210 includes a vane 212 extending from a side wall thereof, the vane 212 extending from the motor support 210 to the housing motor support 117, the vane 212 for supporting and fixing the motor support 210 to the housing assembly 110, the vane 212 extending from the motor support body 211 to the first end cap portion 2111 and reinforcing the strength of the motor support 210; and to stabilize the airflow in airflow path 112 to prevent blower 100 from blowing too turbulent an airflow to be useful to the user. Preferably, the number of the guide vanes 212 is the same as the number of the first support portions 2223 and the second support portions 2112, and the guide vanes 212 are arranged on the motor support 210 in alignment with the second support portions 2112, so that the sunken state of the inner vent 304 on the second surface 2222 is prevented from affecting the connection relationship between the guide vanes 212 and the second surface 2222. In order to optimize the flow guiding effect, the guide vane 212 is designed to be wing-shaped, and one surface of the guide vane, which is close to the air outlet 114, has an extended curve radian, so that the airflow can be effectively stabilized, and the compressive strength of the guide vane 212 per se is improved. That is, the motor support 210 includes guide vanes 212 corresponding to the number of the first support portions 2223, the guide vanes 212 connect the motor support 210 to the housing assembly, and a portion of the guide vanes extend to connect the second support portions 2112.

Figure 11 is a schematic view of the internal airflow of the blower of figure 1. Figure 15 is an internal air flow profile for a blower incorporating the present invention. The main fan 120 is disposed at one side of the stator cover 222 and connected to the motor shaft 240, and is rotated by the motor shaft 240 to generate a high-speed air flow in the air flow path 112. The blower 100 generates both working air flow G1 and heat dissipating air flow G2 during operation. As shown in fig. 11, when the hair dryer 100 is operated, the main fan 120 is driven to generate a working air flow G1, and the working air flow G1 enters the air flow channel 112 from the mesh enclosure 140 of the air inlet 113, and is discharged out of the air outlet 114 after passing through the steady flow of the guide vanes 212, so as to complete the blowing operation of the user. The rotor fan of the rotor end cover 223 is driven by the outer rotor to rotate to generate a heat dissipation air flow G2, the heat dissipation air flow G2 enters the interior of the motor support 210 from the outer air opening of the motor support 210, and dissipates heat to the stator assembly 230 and the rotor assembly 220 through the interior of the motor 200, and discharges a heat dissipation air flow G2 from the inner air vent first ventilating portion 2225 and the outer air vent 214 at the stator end cover 222 in a direction perpendicular to the first surface 2221, and discharges a heat dissipation air flow G2 from the second ventilating portion 2226 of the inner air vent in a direction parallel to the first surface 2221, and the heat dissipation air flow G2 is converged into the working air flow G1 and discharged out of the air outlet 114, so as to improve the heat dissipation efficiency.

Preferably, the outer edge of the projection of the outer rotor housing in a plane perpendicular to the first axis 300 is circular, and the projection of the stator cover 222 in the plane is located in the circle.

Optionally, the angle between the first surface 2221 and the second surface 2222 is 60 ° to 150 °, and preferably, in order to increase the heat dissipation area of the inner vent 304 without excessively increasing the length of the stator end cover, the angle between the first surface 2221 and the second surface 2222 is 90 °, or approximately 90 °.

In the present embodiment, in order to reduce the cost and the installation size, the height of the motor is implemented to be 12-23mm, after the size of the motor is reduced, the effective heat dissipation volume of the motor is reduced, and in order to ensure the normal use of the motor, the heat dissipation performance requirement of the motor is increased. Therefore, in order to ensure the strength and effective heat dissipation of the motor 200, the area of the inner vent 2224 relative to the first surface 2221 can be increased to more than 20% by the present solution, and the height of the second vent 2226 relative to the height of the second surface 2222 accounts for more than 30% in order to ensure the heat dissipation effect. As shown in the following table, in a set of test schemes, the heat dissipation performance of the conventional motor 200 with a height of 25mm and a cross-sectional diameter of the end cover of 35mm is compared with the heat dissipation performance of the heat dissipation motor with a height of 15mm and a cross-sectional diameter of the end cover of 35mm adopting the structure of the present invention, under 1060W, the temperature rise of the motor 200 of the present invention is 84 ℃, while the temperature rise of the conventional motor 200 is 92.8 ℃, and the heat dissipation efficiency is improved under the condition that the size of the motor 200 is reduced, so that the motor 200 with a smaller size can be adopted as the motor 200 of the hair dryer 100, thereby effectively saving the cost and improving the heat dissipation performance.

The invention provides a hair dryer, comprising: a housing assembly; the motor is arranged in the shell assembly; the motor includes: a motor shaft rotatable about a first axis 300; an outer rotor case surrounding the motor shaft; the stator iron core is at least partially arranged in the outer rotor shell; a stator end cover including a second end cover portion 2220 at least partially located at one end of the outer rotor case in the axial direction; the second end cap portion 2220 is formed with an inner vent penetrating the second end cap portion 2220 in a first direction 301 and also penetrating the second end cap portion 2220 in a second direction 302, the second direction 302 being obliquely intersected with or perpendicular to the first direction 301.

Preferably, the first direction 301 is parallel to the first axis and the second direction 302 is perpendicular to the first axis. The first direction 301 and the second direction 302 refer to all possible directions parallel to and perpendicular to the first axis, respectively, and in particular, the inner vents penetrating the second end cap portion 2220 along the second direction 302 are formed around the second end cap portion 2220, respectively, in a plurality of second directions 302 perpendicular to the first axis.

Fig. 12 is a schematic structural view of a stator end cover of a motor according to another embodiment. In another embodiment, the first direction 301 and the second direction 302 intersect obliquely, the first direction 301 and the second direction 302 intersect to form an included angle with an angle range of 30 ° to 120 °, and the angle between the first surface 2221 and the second surface 2222 is 60 ° to 150 °

The invention provides a hair dryer, comprising: a housing assembly; the motor is arranged in the shell assembly and used for driving the main fan to rotate so as to generate working air flow G1 in the air flow channel; the motor includes: a motor shaft rotatable about a first axis; an outer rotor case surrounding the motor shaft; the stator iron core is at least partially arranged in the outer rotor shell; a stator end cover including a second end cover portion 2220 at least partially located at one end of the outer rotor case in an axial direction, the second end cover portion 2220 including: the air conditioner comprises a first supporting part and inner ventilation openings formed between the first supporting part, wherein the number of the first supporting part and the number of the inner ventilation openings are three; the ratio of the area of the projection of the inner vent opening in a plane perpendicular to the first axis to the area of the projection of the second endcap portion 2220 in the plane, which is the projected area of the area defined by the periphery of the second endcap portion 2220, is greater than 20%.

Similarly, the ratio of the area of the projection of the outer vent 214 in a plane perpendicular to the first axis to the area of the projection of the first endcap portion in that plane is greater than 20%. Thereby enabling the first end cap portion to reduce interference with heat dissipation from the interior of the hair dryer and to optimize airflow direction within the interior of the hair dryer.

The ratio of the height of the outer vent 214 in the first direction to the height of the first end cap portion in the first direction is 30% less than 90%. The first end cover part reduces the interference on the heat dissipation of the interior of the blower, and the heat dissipation efficiency is improved. And optimizing airflow direction within the blower.

Figure 13 is a schematic view of the structure of the motor support of the hair dryer of the second embodiment. Fig. 13A is a partially enlarged view of the first end cap portion in fig. 13. Figure 14 is an end side view of a blower of a second embodiment.

In the second embodiment of the present invention, four first support portions (not shown) are provided and symmetrically distributed centering on the installation shaft, and correspondingly, four inner vents 2224A are formed between the first support portions and four corresponding outer vents 214A are formed between the second support portions, so that the first support portions and the inner vents 2224A are alternately arranged two by two. Two liang of connections between the first supporting part, at two first supporting part junctions to installation axle direction indent to promote interior vent 2224A's area, with optimization radiating effect. The symmetrical structure of the inner vent 2224A can increase the size of the inner vent 2224A and ensure the strength of the stator end cover 222A, so that the stator end cover 222A can stably support the structure of the motor 200.

The motor support 210A includes a motor support body and a first end cap portion formed at one end of the motor support body, and the first end cap portion is overlapped and fixedly connected with the stator end cover 222A. The first end cap part is formed in conformity with the first surface 2221 of the second end part and includes second support parts 2112A corresponding to the number of the first support parts. Preferably, in order to prevent the motor support 210A from affecting the size of the inner vent 2224A to reduce the heat dissipation performance, the size of the second support portion 2112A is set to be equal to or smaller than the size of the first support portion, so that the inner vent 2224A is not shielded to reduce the ventilation area and reduce the heat dissipation performance.

Further, the motor support 210A comprises a vane 212A extending from a side wall thereof, the vane 212A extending from the housing assembly 110A to the motor support 210A, the vane 212A for supporting the fixed motor support 210A to the housing assembly 110A, the vane 212A reinforcing the strength of the motor support 210A, in particular the strength of the first end cap portion; and to stabilize the airflow in airflow path 112 to prevent blower 100A from blowing out too turbulent an airflow to be conducive to user operation. As shown in fig. 14, the number of vanes 212A is preferably the same as the number of second supports 2112A, aligned in position. Alternatively, as shown in fig. 13, the number of vanes 212A may not be the same as the number of second support portions 2112A.

Such that the vane 212A is disposed on the motor support 210A in alignment with the second support portion 2112A and extends to the second surface of the stator end cover 222A, the sinking of the inner vent 2224A on the second surface is prevented from affecting the connection relationship of the vane 212A and the second surface, and the strength of the first support portion 2112A is enhanced by the vane 212A. In order to optimize the flow guiding effect, the guide vane 212A is designed to be wing-shaped, and one surface of the guide vane 212A, which is close to the air outlet 114, has an extended curve radian, so that the airflow can be effectively stabilized, and the compressive strength of the guide vane 212A is improved.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this specification can be combined and combined by those skilled in the art without contradiction.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may be modified or adapted without departing from the principles.

Claims

1. A hair dryer, comprising:

the shell assembly comprises a duct, an air inlet and an air outlet, wherein the duct is provided with an air inlet allowing air to enter the air flow channel at one end, and the air outlet allowing air to flow out of the air flow channel at the other end;

a main fan disposed inside the duct;

the motor is arranged in the duct and used for driving the main fan to rotate so as to generate working airflow in the airflow channel;

the method is characterized in that: the hair drier comprises a motor support part for supporting and installing the motor in the duct of the hair drier, the support frame comprises a containing shell for containing the motor and a connecting part for connecting the containing shell and the duct, the containing shell comprises a first end cover part close to an air inlet of the duct, the first end cover part is provided with an outer ventilation opening which penetrates through the first end cover part along a first direction and also penetrates through the first end cover part along a second direction, and the second direction is obliquely intersected with the first direction or is perpendicular to the first direction.

2. The hair dryer of claim 1, wherein: the second end cover part comprises an end cover surface facing the ducted air inlet and at least one side wall surface connected with the end cover surface, a first penetrating outer ventilation opening is formed in the end cover surface, and a second penetrating outer ventilation opening is also formed in the at least one side wall surface.

3. The hair dryer of claim 1, wherein: the first outer vent opening in the end cap face is in communication with the second outer vent opening in the at least one side wall face.

4. The hair dryer of claim 1, wherein:

the motor comprises a motor, a motor and a motor,

a motor shaft rotatable about a first axis;

an outer rotor case surrounding the motor shaft;

the stator iron core is at least partially arranged in the outer rotor shell;

a stator end cover including a second end cover portion at least partially located at one end of the outer rotor case in an axial direction, the first direction being parallel to the first axis, the second direction being perpendicular to the first axis.

5. The hair dryer of claim 1, wherein: the motor comprises a motor, a motor and a motor,

a motor shaft rotatable about a first axis;

an outer rotor case surrounding the motor shaft;

the stator iron core is at least partially arranged in the outer rotor shell;

a stator end cover including a second end cover portion located at least partially at one end of the outer rotor case in an axial direction; the first direction and the second direction are intersected to form an included angle with an angle value interval of 30-120 degrees.

6. The hair dryer of claim 4 or 5, wherein: the second end cap portion is formed with and follows the first direction and link up the second end cap portion and also link up along the second direction the interior vent of second end cap portion, interior vent with outer vent communicates with each other, the second end cap portion has at least two first supporting parts, outer vent is formed at adjacent two between the first supporting part.

7. The hair dryer of claim 6, wherein: the motor support includes a second support portion for connecting with the first support portion to mount the motor to the motor support; the projection of the second support in a plane perpendicular to the first axis is located outside the projection of the inner vent in that plane.

8. The hair dryer of claim 7, wherein: the blower further comprises a connecting piece for connecting the first supporting part and the second supporting part, and the projection of the connecting piece in the plane perpendicular to the first axis is positioned outside the projection of the inner ventilation opening in the plane and is positioned inside the projection of the outer rotor motor in the plane.

9. The hair dryer of claim 5, wherein: the motor supporting piece is provided with an accommodating cavity for accommodating the motor, the motor supporting piece is arranged in the airflow channel, and two ends of the accommodating cavity along the first axis are open; the motor support piece comprises guide vanes corresponding to the number of the first support parts, the guide vanes are connected with the motor support piece to the shell assembly, and part of the guide vanes extend to be connected with the second support parts.

10. The hair dryer of claim 2, wherein: the ratio of the area of the projection of the outer vent in a plane perpendicular to the first axis to the area of the projection of the first end cover part in the plane is greater than 20%, and the motor height is 12-23 mm.

11. The hair dryer of claim 2, wherein: the ratio of the height of the outer vent in the first direction to the height of the first end cap portion in the first direction is 30% less than 90%.

12. The hair dryer of claim 1, wherein: the motor also comprises a rotor end cover, wherein rotor blades are formed on the rotor end cover and are driven by the outer rotor shell to rotate to generate heat dissipation airflow.

13. The hair dryer of claim 4 or 5, wherein: the outer edge of the projection of the outer rotor shell in a plane perpendicular to the first axis is circular, and the projections of the first end cover portion and the second end cover portion in the plane are located in the circle.