CN213508249U

CN213508249U - Hand-held hair drier

Info

Publication number: CN213508249U
Application number: CN202022064642.1U
Authority: CN
Inventors: 彭小湖; 庄榜锋
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-06-22
Anticipated expiration: 2030-09-18

Abstract

A handheld blower comprises a casing, a motor and a fan, wherein the casing comprises a containing part, and the motor and the fan are contained in the containing part. The motor comprises a rotating shaft, an outer rotor fixed on the rotating shaft and an inner stator located between the rotating shaft and the outer rotor, the outer rotor comprises an outer circumferential wall and an end wall located at one end of the outer circumferential wall, and the fan is fixed on the outer circumferential wall. The casing is equipped with the first air intake that is located axial one side of pivot and communicates the portion of holding, the end wall is neighbouring first air intake, the motor is equipped with and is located the epaxial circular guide plate of commentaries on classics, the guide plate is located between first air intake and the end wall, the guide plate is arranged in going out the foreign matter water conservancy diversion such as dust in the air current that first air intake flowed in, prevents that foreign matters such as dust from getting into the motor and leading to the damage of hand-held type hair-dryer.

Description

Hand-held hair drier

[ technical field ]

The utility model relates to a hand-held type hair-dryer, in particular to can dirt-proof hand-held type hair-dryer.

[ background art ]

A blower is a garden tool used for cleaning a garden. The blower includes a motor and a fan, and the motor drives the fan to rotate so as to generate an air flow to blow the fallen leaves and the like. The handheld blower comprises a handle, and a user operates the handheld blower to operate the handheld blower by holding the handle. The volume of the motor and the fan in the traditional centrifugal blower is large, so that the overall size of the blower is large, and the blower is inconvenient to operate in a narrow space. Chinese utility model patent publication No. CN208088201U discloses a brushless external rotor hair drier, which at least partially overlaps the fan and the brushless external rotor motor to make the whole size of hair drier compact, be convenient for use in narrow and small space. However, this type of blower has a drawback that it is impossible to prevent dust or foreign matter from entering therein, so that there may occur a case where the blower is damaged due to the entry of dust or foreign matter; furthermore, the above situation also makes the blower unable to have a dust suction function.

Accordingly, there is a need for an improved hand held hair dryer that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To the deficiency of the prior art, the utility model aims to provide a hand-held hair-dryer convenient to operate in narrow space, this hand-held hair-dryer have dustproof function and dust absorption function.

The utility model provides a technical scheme that prior art problem adopted is: a handheld blower comprises a casing, a motor and a fan, wherein the casing comprises an accommodating part, the motor and the fan are accommodated in the accommodating part, the motor comprises a rotating shaft, an outer rotor fixed on the rotating shaft and an inner stator positioned between the rotating shaft and the outer rotor, the outer rotor comprises an outer circumferential wall and an end wall positioned at one end of the outer circumferential wall, and the fan is fixed on the outer circumferential wall. The casing is equipped with and is located axial one side of pivot and intercommunication the first air intake of portion of holding, the end wall is close to first air intake, the motor is equipped with and is located epaxial circular guide plate rotates, the guide plate is located first air intake with between the end wall.

The further improvement scheme is as follows: the end wall is equipped with the intercommunication inside and outside ventilation hole of motor, the guide plate is close to the ventilation hole, just the diameter of guide plate is not less than the outer fringe diameter in ventilation hole.

The further improvement scheme is as follows: the outer rotor comprises a rotor shell, rotor magnetic poles and a connecting seat, the rotor magnetic poles are fixed on the inner wall surface of the rotor shell to jointly form the outer circumferential wall, and the connecting seat is connected to one end of the rotor shell and fixed to the rotating shaft to form the end wall.

The further improvement scheme is as follows: the guide plate is integrally formed at the front end of the connecting seat.

The further improvement scheme is as follows: the fan is fixed to the outer circumference of the outer circumferential wall, and the fan is at least partially overlapped with the inner stator in an axial direction.

The further improvement scheme is as follows: the fan is a centrifugal fan and comprises an annular mounting hole, a fixing part and a plurality of fan blades, wherein the fixing part extends outwards from the outer periphery of the mounting hole in the radial direction, the motor is accommodated in the mounting hole, and the fan blades extend towards the first air inlet from one side of the fixing part in the axial direction.

The further improvement scheme is as follows: the casing is equipped with and is located motor axial opposite side and intercommunication the second air intake of portion of holding, hand-held type hair-dryer is including being located filter piece in the portion of holding, just filter the piece and be located the motor with between the second air intake.

The further improvement scheme is as follows: the first air inlet is a main air inlet, the second air inlet is a heat dissipation air inlet, and the area of the first air inlet is not smaller than that of the second air inlet.

The further improvement scheme is as follows: the casing is two half structures and includes left casing and right casing, left side casing with right casing forms the wind channel jointly, the motor with the fan set up in the wind channel.

The further improvement scheme is as follows: the casing still include by left side casing with the air outlet that the right side casing formed jointly, first air intake set up in on the right side casing, the second air intake set up in on the left side casing, the motor drives produced air current of fan rotation flows in from first air intake and second air intake the wind channel, and the rethread the motor with behind the fan from the air outlet flows out.

Compared with the prior art, the utility model discloses following beneficial effect has: the casing is equipped with the first air intake that is located axial one side of pivot and communicates the portion of holding, the end wall is close to first air intake, the motor is equipped with and is located the epaxial circular guide plate of commentaries on classics, the guide plate is located between first air intake and the end wall, the guide plate is arranged in leading away the foreign matter such as dust in the air current that flows in first air intake, prevents that foreign matter such as dust from getting into the motor and leading to the damage of hand-held type hair-dryer. The casing is equipped with the second air intake that is located motor axial opposite side and intercommunication portion of holding, the hand-held type hair-dryer is located between motor and the second air intake and filters including being located the portion of holding, filter dust and iron fillings that filter in the air current that the second air intake flowed in, prevent that dust and iron fillings from entering into in the motor.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

FIG. 1 is a perspective view of a hand held hair dryer in accordance with a preferred embodiment of the present invention;

FIG. 2 is an exploded schematic view of the hand held hair dryer of FIG. 1;

FIG. 3 is a cross-sectional view of the hand held hair dryer shown in FIG. 1;

FIG. 4 is a perspective view of the motor and fan of the hand held hair dryer of FIG. 2;

FIG. 5 is an exploded view of the motor and fan of FIG. 4;

fig. 6 is a cross-sectional view of the motor and fan shown in fig. 4.

The meaning of the reference symbols in the figures:

100. the hand-held hair dryer 10, the casing 101, the left casing 102, the right casing 103, the air duct 11, the accommodating portion 12, the first air inlet 13, the second air inlet 14, the air outlet 15, the combining portion 20, the motor 21, the rotating shaft 22, the outer rotor 221, the outer circumferential wall 222, the end wall 223, the vent hole 23, the inner stator 231, the stator support 232, the stator coil 24, the guide plate 25, the rotor housing 26, the rotor magnetic pole 27, the connecting seat 30, the fan 31, the mounting hole 32, the fixing portion 33, the fan blade 40, the filter element 50, and the battery pack

[ detailed description of the invention ]

Referring to fig. 1 to 3, a hand-held hair dryer 100 according to a preferred embodiment of the present invention includes a housing 10, a motor 20 and a fan 30, wherein the motor 20 has an axially extending shaft 21. The casing 10 has a two-half structure and includes a left casing 101 and a right casing 102, the left casing 101 and the right casing 102 together form an air duct 103, the motor 20 and the fan 30 are disposed in the air duct 103, and the air duct 103 is used for guiding an air flow generated by the fan 30.

The housing 10 includes an accommodating portion 11, and a first air inlet 12 and a second air inlet 13 respectively located at two axial sides of the rotating shaft 21, and the motor 20 and the fan 30 are accommodated in the accommodating portion 11. The first air inlet 12 is disposed on the right casing 102 and communicated with the accommodating portion 11, the second air inlet 13 is disposed on the left casing 101 and communicated with the accommodating portion 11, the housing 10 further includes an air outlet 14 formed by the left casing 101 and the right casing 102, and the motor 20 drives the fan 30 to rotate to generate an air flow which flows into the air duct 103 from the first air inlet 12 and the second air inlet 13 and flows out from the air outlet 14 after flowing through the motor 20 and the fan 30.

The first air inlet 12 and the second air inlet 13 are respectively disposed at two axial sides of the casing 10, that is, the direction of the airflow entering the air duct 103 from the first air inlet 12 is opposite to the direction of the airflow entering the air duct 103 from the second air inlet 13. Meanwhile, the direction of the airflow entering the air duct 103 from the first air inlet 12 is perpendicular to the direction of the airflow exiting the air duct 103 from the air outlet 14, and the direction of the airflow entering the air duct 103 from the second air inlet 13 is perpendicular to the direction of the airflow exiting the air duct 103 from the air outlet 14; that is, the direction of the air flow discharged from the air outlet 14 out of the air duct 103 is perpendicular to the axial direction of the rotating shaft 21. The air current gets into the setting of casing 10 from casing 10 both sides, has avoided the unilateral air inlet to cause the noise too big, and the easy problem of adsorbing the foreign matter.

In this embodiment, the first air inlet 12 is a main air inlet, and the second air inlet 13 is a heat dissipation air inlet. The airflow entering the air duct 103 from the second air inlet 13 flows through the inside of the motor 20, and is used for dissipating heat of the motor 20 to cool the motor 20. Specifically, the area of the first intake vent 12 is larger than the area of the second intake vent 13. In other embodiments, the area of the first air inlet 12 is equal to the area of the second air inlet 13, that is, the area of the first air inlet 12 is not smaller than the area of the second air inlet 13.

Referring to fig. 4 to 6, the motor 20 drives the fan 30 to rotate around an axial direction. In the present embodiment, the motor 20 is an outer rotor motor, and more specifically, the motor 20 is an outer rotor brushless motor. The motor 20 includes a rotating shaft 21, an outer rotor 22 fixed on the rotating shaft 21, and an inner stator 23 located between the rotating shaft 21 and the outer rotor 22, wherein the inner stator 23 includes a stator bracket 231 and a stator coil 232 fixed on the stator bracket 231. The stator holder 231 is sleeved on the rotating shaft 21 and can rotate relatively. The fan 30 is disposed at the periphery of the motor 20, and the fan 30 and the motor 20 form a whole, so that the fan 30 and the motor 20 have high balance, which is beneficial to reducing vibration.

As shown in fig. 6, the inner stator 23, the fan 30 and the air duct 103 are at least partially overlapped in the axial direction. That is, the size of the whole of the fan 30 and the motor 20 in the axial direction is equal to the size of the motor 20 in the axial direction; in other embodiments, the fan 30 and the motor 20 form a whole having a dimension in the axial direction equal to the dimension of the fan 30 in the axial direction. The structural arrangement of the motor 20 and the fan 30 shortens the dimension of the whole of the motor 20 and the fan 30 in the axial direction, so that the dimension of the accommodating part 11 in the axial direction becomes smaller; thereby avoided in the traditional hair-dryer fan and motor to arrange side by side, caused the oversize in the axial and arouse that the hair-dryer width is too big, caused awkward problem. The size of the hand-held hair drier 100 in the width direction is reduced, which is beneficial for users to use in narrow space and improves the application range of the hand-held hair drier 100.

The outer rotor 22 includes an outer circumferential wall 221 and an end wall 222 at one end of the outer circumferential wall 221, and the fan 30 is fixed to the outer circumferential wall 221. The end wall 222 is adjacent to the first air inlet 12 and is provided with a vent 223 communicating the inside and the outside of the motor 20. The motor 20 is provided with a circular baffle 24 positioned on the rotating shaft 21, and the baffle 24 is positioned between the first air inlet 12 and the end wall 222. The baffle 24 is adjacent to the vent 223, and the diameter of the baffle 24 is not smaller than the diameter of the outer edge of the vent 223. Therefore, the air guide plate 24 is used for guiding out foreign matters such as dust in the airflow flowing in from the first air inlet 12, and preventing the foreign matters such as dust from entering the motor 20 to damage the hand-held hair dryer 100.

In the present embodiment, the outer rotor 22 includes a rotor housing 25, rotor poles 26 and connecting seats 27, the rotor poles 26 are fixed to an inner wall surface of the rotor housing 25 to form the outer circumferential wall 221 together, and the connecting seats 27 are connected to one end of the rotor housing 25 and fixed to the rotating shaft 21 to form the end wall 222. The guide plate 24 is integrally formed at the front end of the connection socket 27. In other embodiments, the baffle 24 may be provided separately from the connection base 27.

The fan 30 is a centrifugal fan and is fixed to the outer periphery of the rotor case 27 so as to be rotated in the axial direction by the motor 20. The fan 30 includes an annular mounting hole 31, a fixing portion 32 extending radially outward from an outer circumference of the mounting hole 31, and a plurality of blades 33, and the motor 20 is accommodated in the mounting hole 31. In this embodiment, the fan blade 33 extends from one side of the fixing portion 32 toward the first air inlet 12 in the axial direction, that is, the fan blade 33 is disposed at one side of the fixing portion 32; in this case, the fan 30 may be referred to as a single-side intake fan. In other embodiments, the two sides of the fixing portion 32 are provided with blades, that is, the blades are symmetrical with respect to the fixing portion 32, and at this time, the fan may also be referred to as a double-side intake fan.

The hand-held hair dryer 100 includes a filter member 40 in the accommodating portion 11, and the filter member 40 is a filter sponge and is located between the motor 20 and the second air inlet 13. The filter member 40 is used for filtering dust and iron filings in the air flow flowing in from the second air inlet 13, and preventing the dust and the iron filings from entering between the outer rotor 22 and the inner stator 23 of the motor 20.

The hand-held hair dryer 100 further comprises a battery pack 50, wherein the battery pack 50 is electrically connected with the motor 20, i.e. the battery pack 50 can supply power to the motor 20. The battery pack 50 is detachably coupled to the casing 10, the casing 10 is formed with a coupling portion 15, and the battery pack 50 is detachably coupled to the coupling portion 15. In other embodiments, the hand-held hair dryer 100 includes an electrical cord that connects to a power grid or battery pack to power the motor.

The utility model discloses in, motor 20 is the external rotor electric machine, makes the whole size of hand-held hair-dryer 100 accomplishes the compactness, helps the user to use in narrow space. The casing 10 is provided with the first air inlet 12 that is located the axial one side of pivot 21 and communicates the portion of holding 11, end wall 222 is close to first air inlet 12, motor 20 is provided with the circular guide plate 24 that is located pivot 21, guide plate 24 is located between first air inlet 12 and the end wall 222, guide plate 24 is arranged in the foreign matter water conservancy diversion such as the dust in the air current that first air inlet 12 flows in and goes out, prevents that foreign matter such as dust from getting into motor 20 and leading to the damage of hand-held hair-dryer 100. Further, the casing 10 is provided with a second air inlet 13 located on the other axial side of the motor 20 and communicated with the accommodating portion 11, the hand-held hair dryer 100 includes a filter element 40 located in the accommodating portion 11 and located between the motor 20 and the second air inlet 13, and the filter element 40 is used for filtering dust and iron filings in the air flow flowing in from the second air inlet 13 and preventing the dust and the iron filings from entering between the outer rotor 22 and the inner stator 23 of the motor 20.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many alternatives to the hand held hair dryer may be employed without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A handheld blower comprises a casing, a motor and a fan, wherein the casing comprises an accommodating part, the motor and the fan are accommodated in the accommodating part, the motor comprises a rotating shaft, an outer rotor fixed on the rotating shaft and an inner stator positioned between the rotating shaft and the outer rotor, the outer rotor comprises an outer circumferential wall and an end wall positioned at one end of the outer circumferential wall, and the fan is fixed on the outer circumferential wall; the method is characterized in that: the casing is equipped with and is located axial one side of pivot and intercommunication the first air intake of portion of holding, the end wall is close to first air intake, the motor is equipped with and is located epaxial circular guide plate rotates, the guide plate is located first air intake with between the end wall.

2. The hand held hair dryer of claim 1, wherein: the end wall is equipped with the intercommunication inside and outside ventilation hole of motor, the guide plate is close to the ventilation hole, just the diameter of guide plate is not less than the outer fringe diameter in ventilation hole.

3. A hand held hair dryer as claimed in claim 2, wherein: the outer rotor comprises a rotor shell, rotor magnetic poles and a connecting seat, the rotor magnetic poles are fixed on the inner wall surface of the rotor shell to jointly form the outer circumferential wall, and the connecting seat is connected to one end of the rotor shell and fixed to the rotating shaft to form the end wall.

4. A hand held hair dryer as claimed in claim 3, wherein: the guide plate is integrally formed at the front end of the connecting seat.

5. The hand held hair dryer of claim 1, wherein: the fan is fixed to the outer circumference of the outer circumferential wall, and the fan is at least partially overlapped with the inner stator in an axial direction.

6. A hand held hair dryer as claimed in claim 5, wherein: the fan is a centrifugal fan and comprises an annular mounting hole, a fixing part and a plurality of fan blades, wherein the fixing part extends outwards from the outer periphery of the mounting hole in the radial direction, the motor is accommodated in the mounting hole, and the fan blades extend towards the first air inlet from one side of the fixing part in the axial direction.

7. The hand held hair dryer of claim 1, wherein: the casing is equipped with and is located motor axial opposite side and intercommunication the second air intake of portion of holding, hand-held type hair-dryer is including being located filter piece in the portion of holding, just filter the piece and be located the motor with between the second air intake.

8. The hand held hair dryer of claim 7, wherein: the first air inlet is a main air inlet, the second air inlet is a heat dissipation air inlet, and the area of the first air inlet is not smaller than that of the second air inlet.

9. A hand held hair dryer as claimed in claim 8, wherein: the casing is two half structures and includes left casing and right casing, left side casing with right casing forms the wind channel jointly, the motor with the fan set up in the wind channel.

10. A hand held hair dryer as claimed in claim 9, wherein: the casing still include by left side casing with the air outlet that the right side casing formed jointly, first air intake set up in on the right side casing, the second air intake set up in on the left side casing, the motor drives produced air current of fan rotation flows in from first air intake and second air intake the wind channel, and the rethread the motor with behind the fan from the air outlet flows out.