CN105442478A - Blower - Google Patents
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- CN105442478A CN105442478A CN201510622873.0A CN201510622873A CN105442478A CN 105442478 A CN105442478 A CN 105442478A CN 201510622873 A CN201510622873 A CN 201510622873A CN 105442478 A CN105442478 A CN 105442478A
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Abstract
The invention relates to a blower. The blower comprises a casing, a motor, an axial flow fan, a blowpipe and a duct, wherein a wind inlet is formed in the casing, and air enters the casing through the wind inlet; the motor is positioned in the casing; the axial flow fan is driven by the motor to rotate along a fan axis and generate air currents; the blowpipe is connected with the casing and is provided with a wind outlet, and the air currents are blown out of the wind outlet; the duct is used for guiding the air currents to move towards the wind outlet; air current passages are arranged in the casing and the blowpipe, and comprise an upstream region from the wind inlet to the axial flow fan and a downstream region from the axial flow fan to the wind outlet, the motor is arranged at the upstream region, and the duct is arranged at the downstream region.
Description
Technical field
The present invention relates to a kind of electric tools, especially a kind of hair-dryer.
Background technology
In daily life, hair-dryer is more common a kind of instrument, is commonly used to clear up the ground such as garden or street.
As US Patent No. 4880364 discloses a kind of hair-dryer, it comprises housing, motor, fan and air channel.Fan rotates and produces air-flow, blows out from air channel.But what the fan of this kind of hair-dryer adopted is centrifugal fan, and air intake is arranged in the below of centrifugal fan, and air outlet is arranged in the side of centrifugal fan.Due to the restriction of this body structure of centrifugal fan, the air quantity of this kind of hair-dryer blowout is often little, and therefore airflow effects is not good, is not well positioned to meet the demand of user.
As US Patent No. 5975862 discloses a kind of engine that adopts as the hair-dryer of power, engine utilizes gasoline for fuel is as power, and fan still adopts centrifugal fan.But the motor general due to the power ratio of engine is large, and it can drive centrifugal fan to rotate with higher rotating speed, thus exports larger air quantity and wind speed, thus meets consumers' demand to a certain extent.But owing to adopting the hair-dryer of gasoline engine, often operating noise is larger, and adopts gasoline energy supply, easily forms atmosphere pollution, inadequate environmental protection.
As US Patent No. 7739773 discloses a kind of hair-dryer, it comprises housing, engine, fan and air channel.Fan becomes aerofoil fan.Engine is still power with gasoline, and machine drives aerofoil fan work by transmission mechanism.But this engine is arranged distance fan is comparatively far away, and the volume of the whole hair-dryer that seems is comparatively large, does not meet the development trend of Portable light.And its power source is still gasoline, easily atmospheric environment is formed and pollute.
Some hair-dryers and for example on market.Motor is positioned at housing, rotates for drive fan.Air channel comprises air intake and air outlet, and air enters from air intake, blows out from air outlet.In order to make air outlet blow out larger air quantity, fan is preferably aerofoil fan.The duct of the air-flow trend that leading axle flow fan is formed also is provided with in air channel.In order to make hair-dryer keep compact structure, motor is arranged in duct.Because the tool of motor own has the dimensions, duct also must arrange enough sizes could hold motor.But the operating efficiency that the drawback brought thus is whole hair-dryer reduces.
Therefore be necessary to improve prior art means.
Summary of the invention
In view of this, an object of the present invention is to provide a kind of hair-dryer taking into account size and aspect of blowing efficiency.
For achieving the above object, the technical solution adopted in the present invention is: a kind of hair-dryer, comprising: housing, and described housing is provided with air intake, and air enters from described air intake; Motor, is positioned at described enclosure interior; Aerofoil fan, is driven by described motor and rotates along a fan axis and produce air-flow; Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet; Duct, moves to described air outlet for guiding air-flow; In wherein said housing and described blower, there is gas channel, upstream region described gas channel comprises from described air intake to described aerofoil fan and from described aerofoil fan to described air outlet downstream area, described motor is arranged at described upstream region, and described duct is arranged at described downstream area.
Preferably, described air intake, described motor, described aerofoil fan and described duct longitudinally arrange successively.
Preferably, described air intake overlaps with the small part that is projected to of described air outlet in the plane perpendicular to described fan axis.
Preferably, described gas channel comprises some wind faces excessively perpendicular to airflow passes direction, and the minimum area crossing wind face of described upstream region is greater than the area of the plane of rotation of the blade rotation formation of described aerofoil fan.
Preferably, described upstream region comprises the circle zone arranged around described motor, described circle zone minimum cross wind face area and and the scope of the area ratio of plane of rotation that formed of the blade rotation of described aerofoil fan between 1.5 to 2.5.
Preferably, described upstream region comprises the transitional region longitudinally between described motor and described aerofoil fan, and the inwall of the housing at described transitional region place is smooth surface.
Preferably, described transitional region minimum crosses the scope of the area ratio of the plane of rotation that the area in wind face and the blade rotation of described aerofoil fan are formed between 1.5 to 2.5.
Preferably, the fore-and-aft distance between described aerofoil fan and described motor is 25 millimeters.
Preferably, described hair-dryer also comprises the braced structures for supporting described motor, described braced structures comprise be fixedly connected with described housing outer ring, for fixing described motor inner ring and connect some support members of described inner ring and outer ring.
Preferably, described some support members radial direction extends and is provided with the circulating area that air feed flows through between adjacent described some support members.
Preferably, described inner ring there is centre bore that described motor shaft passes and from described center bore to the rib extended.
Preferably, described motor sectional area is longitudinally 0.6 ~ 0.7 with the ratio of described gas channel sectional area longitudinally.
Preferably, described air intake is provided with dismountable safety guard.
Preferably, described safety guard is provided with labyrinth passage, makes air enter enclosure interior along the travel path of bending.
Preferably, described labyrinth passage comprises the first passage of longitudinal extension and the second channel with the angled setting of described first passage.
For achieving the above object, the present invention also comprises a kind of technical scheme and is: a kind of suction and blowing device, selectively works under blowing mould formula or suction mode, comprising: housing, and described housing is provided with air intake, and air enters from described air intake; Motor, is positioned at described enclosure interior; Aerofoil fan, is driven by described motor and rotates along a fan axis and produce air-flow; Blowing assembly and air draught assembly, can be connected to described housing; Under blowing mould formula, described blowing assembly is connected with described housing, and described aerofoil fan rotates, and under suction mode, described air draught assembly is connected with described housing; Wherein said blowing assembly comprises blower and duct, and described blower can connect described housing and have air outlet, and described air-flow blows out from described air outlet; Described duct moves to described air outlet for guiding described air-flow, in described housing and described blower, there is gas channel, described gas channel comprises from described air intake to the upstream region of described aerofoil fan and from described aerofoil fan to the downstream area of described air outlet, described motor is arranged at described upstream region, and described duct is arranged at described downstream area.
For achieving the above object, the present invention also comprises a kind of technical scheme and is: a kind of hair-dryer, comprising: housing, and described housing is provided with air intake, and air enters from described air intake; Aerofoil fan, operationally rotates along a fan axis and produces air-flow; Motor, rotates for driving described aerofoil fan; Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet; Duct, moves to described air outlet for guiding described air-flow; Described motor is positioned at described housing, and described motor and described duct lay respectively at the relative both sides of described aerofoil fan, arranging towards with described fan axis angle of described air intake.
For achieving the above object, the present invention also comprises a kind of technical scheme and is: a kind of hair-dryer, comprising: housing, and described housing is provided with air intake, and air enters from described air intake; Aerofoil fan, operationally rotates along a fan axis and produces air-flow; Motor, rotates for driving described aerofoil fan; Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet; Duct, moves to described air outlet for guiding described air-flow; Described hair-dryer also comprises the electric machine casing receiving described motor, and described electric machine casing is positioned at the outside of described housing, is provided with the cooling fan for cooling described motor in described electric machine casing.
Preferably, described electric machine casing departs from described fan axis and arranges, and the axis of described motor is not overlapped with described fan axis.
Preferably, be provided with transmission mechanism between described fan and described motor, described transmission mechanism comprises driving belt or gear train.
Preferably, described electric machine casing is arranged along fan axis, makes the axis of described motor and described fan dead in line.
Compared with prior art, beneficial effect of the present invention is: motor is arranged on upstream region, and duct is arranged on downstream area, the selection of motor can not by the restriction of duct size, thus improve aspect of blowing efficiency further, and motor is arranged in air channel, has good radiating effect.
Accompanying drawing explanation
Above-described object of the present invention, technical scheme and beneficial effect by the detailed description that can realize specific embodiments of the invention below, can describe and clearly obtain simultaneously by reference to the accompanying drawings.
Identical label in accompanying drawing and manual and symbol are for representing identical or equivalent element.
Fig. 1 is the overall schematic of the hair-dryer of first embodiment of the invention.
Fig. 2 is the decomposing schematic representation of the internal construction of hair-dryer in Fig. 1.
Fig. 3 is the schematic diagram of the internal construction of hair-dryer in Fig. 1.
Fig. 4 is the enlarged diagram in the B region of hair-dryer in Fig. 3.
Fig. 5 is the schematic perspective view of the first support of hair-dryer in Fig. 1.
Fig. 6 is the sectional view of the duct linearly AA of hair-dryer in Fig. 3.
Fig. 7 is the schematic perspective view of the fan of hair-dryer in Fig. 2.
Fig. 8 is the generalized section that the hair-dryer in Fig. 1 is in duty.
Fig. 9 is the top view of the hair-dryer shown in Fig. 8.
Figure 10 is the schematic diagram of the air outlet of hair-dryer in Fig. 1.
Figure 11 is the enlarged diagram in the C region of hair-dryer in Figure 10.
Figure 12 is the overall schematic of the hair-dryer of second embodiment of the invention.
Figure 13 is the schematic diagram of the hair-dryer of third embodiment of the invention.
Figure 14 is the schematic diagram of the hair-dryer of fourth embodiment of the invention.
Figure 15 is the schematic diagram of the hair-dryer of fifth embodiment of the invention.
100, hair-dryer 101, longitudinal axis 102, blowing assembly
103, air draught assembly 200, housing 201, upstream region
202, downstream area 203, air intake 204, circle zone
205, transitional region 206, safety guard 207, labyrinth passage
208, first passage 209, second channel 300, motor
301, motor shaft 302, stator 303, rotor
304, electric machine casing 305, cooling fan 306, transmission mechanism
400, duct 401, deflection cone 402, stator blade
403, duct outer cover 404, protective cover 405, shell
406, cone-shaped cavity 407, fixed cover 500, fan
501, fan axis 502, blade 503, circumferential connecting band
504, wheel hub 600, blower 601, air outlet
602, gas channel 700, handle 701, gauge tap
703, grip part 707, first axle 709, second axis
800, braced structures 801, first support 802, second support
803, connector 804, fixed cell 805, inner ring
806, outer ring 807, support member 808, first circulating area
809, perforation 810, reinforcing rib 811, second circulating area
S1, plane of rotation area S2, air outlet area S4, circle zone cross wind area
S5, transitional region cross wind area D1, fan diameter D2, hub diameter
α, inwall angle β, outer wall angle G, center of gravity
L, fore-and-aft distance
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
It is the hair-dryer 100 of first embodiment of the invention shown in Fig. 1 to Fig. 7.Hair-dryer 100 comprises housing 200, motor 300, duct 400, fan 500, blower 600.Wherein, motor 300, duct 400, fan 500 are all arranged in housing 200.Blower 600 connects housing 200.Blower 600 and housing 200 are connected to form gas channel 602.Blower 600 is provided with air outlet 601, and air moves to air outlet 601 from gas channel 602 and blows out from air outlet 601, for blowing away ground fallen leaves, rubbish.Motor 300 has motor shaft 301, and motor shaft 301 is connected with fan 500 and drive fan 500 is rotated, and fan 500 can be rotated around its fan axis 501, thus drives air to move formation air-flow, as shown by the arrows in Figure 3.Certainly, motor shaft 301 also can connect fan 500 by transmission mechanism.Transmission mechanism can be the common structures such as epicyclic train.。Gas channel 602 comprises upstream region 201 and downstream area 202, and the direction from upstream region 201 to downstream area 202 is defined as longitudinal direction.Air roughly moves longitudinally.And upstream region 201 is positioned at the side of the longitudinal direction of fan 500, downstream area 202 is positioned at the opposite side of the longitudinal direction of fan 500.Hair-dryer 100 defines the longitudinal axis 101 extended longitudinally.In the present embodiment, fan 500 is preferably aerofoil fan.As shown in Figure 7, aerofoil fan comprises wheel hub 504 and blade 502.The blade 502 of aerofoil fan rotates the bearing of trend that the air-flow moving direction formed is fan axis 501, and that is, fan axis 501 extends longitudinally equally, and overlaps with longitudinal axis 101.The blade 502 of aerofoil fan rotates and forms plane of rotation, and this plane of rotation vertical longitudinal axis 101 is arranged.Duct 400 is arranged compared to blower 600 closer to fan 500.Housing 200 is also provided with air intake 203, and air enters into the inside of housing 200 from air intake 203.In this preferred embodiment, air intake 203, motor 300, fan 500 longitudinally arrange successively with duct 400.Wherein, air intake 203 and air outlet 601 small part that is projected in the plane perpendicular to longitudinal axis 101 overlaps.Upstream region 201 refers to the region place, the center plane from air intake 203 to fan 500, the region downstream area 202 refers to from place, the center plane of fan 500 to air outlet 601.When fan 500 carries out rotary work, extraneous air enters into the inside of housing 200 from air intake 203, successively by after fan 500 and duct 400, blow out from the air outlet 601 being positioned at blower 600.
As is illustrated by figs. 11 and 12, air intake 203 is provided with dismountable safety guard 206 with housing 200.Safety guard 206 is fixedly connected with housing 200 is dismountable by bolt.The effect of safety guard 206 is the inside preventing the finger of user from extending into housing 200, thus produces dangerous.Safety guard 206 comprises some pieces of eyed structures.Reinforcing rib is provided with to promote the firmness of whole safety guard 206 between every block eyed structure.Safety guard 206 entirety also also on-plane surface setting in addition, but form the air intake surface of an arc.In a preferred embodiment, those eyed structures are labyrinth passage 207, and that is air is by not linearly passing through during this labyrinth passage, but air produces bending on travel path.The benefit of such design increases the total traveling distance of air through safety guard 206, make air by time the also corresponding increase of noise transmission path, reduce the generation of noise.Prove through overtesting, adopt the safety guard 206 of this structure to make noise to reduce by 4 to 6 decibels.This labyrinth passage 207 comprises the first passage 208 and second channel 209 that connect setting at least at an angle.In a preferred embodiment, this angle is obtuse angle.One end of first passage 206 is communicated with extraneous, and the other end is communicated with second channel 209.One end of second channel 209 is communicated with first passage 208, and the other end is communicated to the inside of housing 200.Air is introduced into first passage 208 from the external world, and then by second channel 209, finally enters into the inside of housing 200.In a preferred embodiment, first passage 208 roughly extends longitudinally, and second channel 209 fore-and-aft tilt setting relatively.
Housing 200 also has the handle 700 for operator's gripping effect.Preferably, handle 700 is also provided with gauge tap 701.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 6, duct 400 is positioned at downstream area 202.Compared to blower 600, duct 400 is closer to fan 500.The effect of duct 400 guides the air-flow of fan 500 generation to move to the air outlet 601 of blower 600.And what make air-flow moves towards centralized and unified, promote air-out effect.Duct 400 includes deflection cone 401, the collecting duct outer cover 403 of deflection cone 401 and the stator blade 402 between deflection cone 401 and duct outer cover 403.Deflection cone 401 is roughly arranged along the moving direction of air-flow.Deflection cone 401 is positioned at the center of gas channel 602, and deflection cone 401 comprises the cone-shaped cavity 406 of shell 405 and shell 405 inside.Form airflow space between the shell 405 of deflection cone 401 and duct outer cover 403, the cross section of the vertical longitudinal axis 101 of this free air space is roughly annular.Stator blade 402 is positioned at the free air space of this annular, and roughly compartment of terrain distribution.Interval between two between stator blade 402 is for airflow.In the present embodiment, the quantity of stator blade 402 is 7.But the present invention does not limit the quantity of stator blade 402.In a preferred embodiment, stator blade 402 relative wind moving direction is arranged obliquely, and the angle tilted is preferably 5 degree to 15 degree.Stator blade 402 is at least fixedly connected with deflection cone 401 and one of duct outer cover 403 diametrically.In a preferred embodiment, the volume of deflection cone 401 is less than the volume of motor 300.That is, motor 300 cannot be arranged in deflection cone 401.And duct outer cover 403 is contained in housing 200, and be fixedly connected with housing 200.In a preferred embodiment, duct 400 also comprises protective cover 404, and protective cover 404 uprush moves towards to arrange, in other words vertical longitudinally setting.The effect of protective cover 404 prevents foreign matter from entering duct 400.Also be provided with between duct 400 and housing 200 for the fixed cover 407 of fixing duct 400 with housing 200 relative position.
As shown in Figure 8 and Figure 9, in the present embodiment, motor 300 is set to alternating current generator 300.Certainly, also can be set to direct current generator 300, correspondingly, housing 200 or handle 700 arrange power brick (not shown), and power brick is electrically connected with motor 300.Further, motor 300 is set to DC brushless motor 300.
Handle 700 has the grip part 703 gripped for operator.In addition, handle 700 is also provided with gauge tap 701, gauge tap 701 is electrically connected with motor 300, to control the opening and closing of motor 300.Preferably, gauge tap 701 also can control the rotating speed of motor 300.
Blower 600 extends along first axle 707 lengthwise, grip part 703 extends along the second axis 709 lengthwise, first axle 707 and the second axis 709 define the first plane, the projection of center of gravity G in the second plane of hair-dryer 100 is positioned at the drop shadow spread of grip part 703 in the second plane, second plane parallel in the second axis 709, and perpendicular to the first plane.So, when gripping grip part 703 and blowing operation, second axis 709 of usual grip part 703 is roughly parallel to horizontal plane, the now projection of center of gravity G in the second plane of hair-dryer 100 is positioned at the drop shadow spread of grip part 703 in the second plane, operator is made not need additionally to overcome the power of hair-dryer 100 deflection, operation as snug as a bug in a rug, avoids the fatigue worked long hours.
In the present embodiment, motor 300 is heavier, in the complete machine weight of hair-dryer 100, accounting is larger, blower 600 adopts comparatively light and thinner material in addition, thus by motor 300 is arranged at outside duct 400, and below the grip part 703 being positioned at handle 700, thus ensure that the projection of center of gravity G in the second plane of hair-dryer 100 is positioned at the drop shadow spread of grip part 703 in the second plane, hair-dryer 100 is operated comfortable.
In addition, the projection of center of gravity G in the 3rd plane of hair-dryer 100 is positioned at the drop shadow spread of grip part 703 in the 3rd plane, the 3rd plane parallel in first axle 707, and perpendicular to the first plane.So, also ensure that when gripping grip part 703 and blowing operation, make operator not need additionally to overcome the power of hair-dryer 100 deflection, operation as snug as a bug in a rug, avoids the fatigue worked long hours.
First axle 707 and the second axis 709 angle are not more than 25 degree.When operating hair-dryer 100 and blowing operation, first axle 707 and the horizontal plane of blower 600 become to be not more than the angle of 25 degree, and now the aspect of blowing efficiency of hair-dryer 100 is higher.Therefore, so arrange, when can ensure blowing operation, the second axis 709 of grip part 703 is almost parallel with horizontal plane, thus while making hair-dryer 100 ensure high aspect of blowing efficiency, operates more comfortable, further avoid the fatigue worked long hours.
Preferably, first axle 707 and the second axis 709 angle are roughly 10 degree.When operating hair-dryer 100 and blowing operation, the first axle 707 of blower 600 becomes roughly 10 angles of spending with horizontal plane, now the aspect of blowing efficiency of hair-dryer 100 is the highest.Therefore, so arrange, when can ensure blowing operation, the second axis 709 of grip part 703 is almost parallel with horizontal plane, thus while making hair-dryer 100 ensure higher aspect of blowing efficiency, operates more comfortable.
In the present embodiment, when first axle 707 becomes to be not more than the angle of 25 degree with horizontal plane, the center of gravity G projection in the horizontal plane of hair-dryer 100 is positioned at grip part 703 drop shadow spread in the horizontal plane.Setting like this, when can ensure blowing operation, while hair-dryer 100 ensures high aspect of blowing efficiency, rapid operation and comfortable, avoids the fatigue worked long hours.
Further, when first axle 707 becomes 10 degree of angles with horizontal plane, the center of gravity G projection in the horizontal plane of hair-dryer 100 is positioned at grip part 703 drop shadow spread in the horizontal plane.
Preferably, the center of gravity G of hair-dryer 100 is between fan and motor 300.
Further, the projection of center of gravity G in the second plane of hair-dryer 100 is positioned at the drop shadow spread of motor 300 in the second plane.
In addition, the projection of motor 300 in the second plane and grip part 703 in the second plane to be projected to small part overlapping.So, can ensure that the projection of the center of gravity G of hair-dryer 100 in the second plane is positioned at the drop shadow spread of grip part 703 in the second plane further.Make hair-dryer 100 compact conformation, and operate comfortable.
As shown in Figure 3 and Figure 7, in the present invention, the fan 500 of hair-dryer 100 preferably adopts aerofoil fan, and aerofoil fan can provide better airflow effects compared to centrifugal fan.Fan 500 is arranged between motor 300 and duct 400, and the fan axis 501 of fan 500 overlaps with the center line of blower 600.In housing 200 and blower 600, there is gas channel 602, gas channel 602 comprises upstream region 201 from air intake 203 to fan 500 and from aerofoil fan 500 to the downstream area 202 of air outlet 601, motor 300 is arranged at upstream region 201, and duct 400 is arranged at downstream area 202.
Motor 300 is arranged on upstream region 201 in housing 200, motor 300 has motor shaft 301, motor shaft 301 is connected with fan 500 and can drive fan 500 rotates around its fan axis 501, thus drives air to move formation air-flow from upstream region 201 to downstream area 202.The present embodiment fan 500 comprises the wheel hub 504 and multiple blade 502 be arranged on wheel hub 504 that connect with motor shaft 301, and the concrete volume cost invention for blade 502 does not have strict restriction.Fan 500 also comprises circumferential connecting band 503, and circumferential connecting band 503 is around all blades 502 of connection.The setting of circumference connecting band 503, can increase the rigidity of fan 500 on the one hand, extends the application life of fan 500, prevents from using a period of time aft-fan 500 to occur the phenomenons such as damaged; The stability after fan 500 high-speed rotation can be increased on the other hand, the noise produced after contributing to reducing fan 500 high-speed rotation.
Table 1 lists hair-dryer 100 and tests the data producing noise level when front and after installing circumferential connecting band 503 the fan 500 of installation circumference connecting band 503 recorded operates.Before installing circumferential connecting band 503 as can be seen from Table 1, the average of the four groups of noise datas recorded in front is 100 decibels; And after the installation circumference connecting band 503 of correspondence, the average of the four groups of noise datas recorded in front is 96.8 decibels.In addition, before installing circumferential connecting band 503 as can also be seen from Table 1, the average of the four groups of noise datas recorded in the wings is 99.4 decibels; And after the installation circumference connecting band 503 of correspondence, the average of the four groups of noise datas recorded in the wings is 98.2 decibels.Can find out that from data installing the noise recorded in different azimuth when circumferential connecting band 503 aft-fan 500 operates is obtained for reduction.
Table 1
As shown in Figure 7, the diameter of fan 500 of the present invention is less than 88 millimeters, and the output speed of motor shaft 301 is greater than 21000 revs/min.Preferably, the fan diameter D1 of fan 500 is arranged within 50 millimeters of-88 millimeters of scopes, and in the present embodiment, the fan diameter D1 of fan 500 is set as 82 millimeters.
The series of experiments data that hair-dryer 100 relates to fan diameter, motor speed, air quantity and wind speed have been recorded during design.In experiment motor speed we have selected and be greater than 21000 revs/min, be set to 25000 revs/min, the air quantity produced when being determined at the fan 500 selecting different diameters accordingly and the numerical value of wind speed.Show in data, when fan diameter is greater than 88 millimeters of settings, higher air quantity and wind speed can be obtained, but the consequence brought is simultaneously, the power consumption of hair-dryer 100 can be higher, the data recorded in experiment be power consumption more than 1011W, use power brick as the energy time, the operable time serious curtailment of hair-dryer 100.Therefore in order to reduce the power consumption of blower 100, preferably the fan diameter of hair-dryer 100 is set smaller than 88 millimeters.When fan diameter is set in the numerical value being less than 88 millimeters, along with the reduction of numerical value, the power consumption of blower 100 is reducing gradually, but the consequence simultaneously brought is, the air quantity of blower 100 and wind speed also totally present the trend reduced gradually.Being set smaller than at fan diameter equals when 50 millimeters, and the airflow value recorded is less than or equal to 200CFM accordingly, and the air speed value recorded is less than or equal to 70MPH accordingly, and now the airflow effects of hair-dryer 100 is poor, and air-out efficiency is lower.Therefore, while consideration power consumption, take into account the airflow effects of hair-dryer 100, fan diameter is preferably set within 50 millimeters of-88 millimeters of scopes.Data display is when fan diameter is set within 50 millimeters of-82 millimeters of scopes, along with the increase of fan diameter, the air quantity of hair-dryer 100, wind speed and power consumption are all in increase, and when fan diameter is set as 82 millimeters, the air quantity of hair-dryer 100, wind speed and power consumption all reach a maximum value.When fan diameter is set within 82 millimeters of-88 millimeters of scopes, along with the increase of fan diameter, the air quantity of hair-dryer 100, wind speed and power consumption are equally all in increase, and when fan diameter is set as 88 millimeters, the air quantity of hair-dryer 100, wind speed and power consumption reach a maximum value equally.Fan diameter is in this section of interval of 50 millimeters-82 millimeters, and along with the increase of fan diameter, wind speed, air quantity and power consumption are all in lifting.And fan diameter is in this section of interval of 82 millimeters-88 millimeters, along with the increase of fan diameter, wind speed and air quantity are still in lifting, but now power consumption significantly promotes.Generally speaking, fan diameter in this section of interval of 50 millimeters-88 millimeters, along with the increase of fan diameter, wind speed, air quantity and power consumption are all the trend increased, but when diameter is more than 82 millimeters, the increasing degree of wind speed, air quantity is not very large, and now power consumption has had and has significantly increased.Fan diameter more than 82 millimeters after, significantly increase the increase that power consumption only brings wind speed by a small margin and air quantity, after therefore considering, the diameter of fan is set as 82 millimeters the most at last.Such design can make hair-dryer 100 control while lower power consumption, increases air quantity and the wind speed of hair-dryer 100, and the higher aspect of blowing efficiency of final acquisition and better airflow effects.
In addition, preferably, the output speed of motor shaft 301 is set within 21000 revs/min of-50000 revs/min of scopes.Improve the rotating speed of motor shaft 301, and reduce the size of fan 500 simultaneously, form the layout that high rotating speed drives small fan.Such design can reduce power consumption, makes under the satisfied guarantee single dc-battery bag time, improves wind speed, thus obtains higher aspect of blowing efficiency and better airflow effects.
The ratio of the hub diameter D2 of the wheel hub 504 of the present embodiment fan 500 and the fan diameter D1 of fan 500 is within 0.1-0.7 scope.The hub diameter D2 of general fan 500 and the ratio of fan diameter D1 are otherwise known as hub ratio, hereafter directly set forth with hub ratio.In the fixed-size situation of fan 500 external diameter, hub ratio determines the proportioning between wheel hub 504 and blade 502, and finally can have influence on the air-out situation of fan 500.According to one group of data of hub ratio and air quantity relationship experiments gained, surveying timing setting motor speed constant is 24000 revs/min, and what upstream region 201 was minimum crosses wind sectional area is 7190MM
2, the minimum cross-sectional area can taking the cross section that air-flow passes through that is from air intake 203 to fan 500 in is 7190MM
2, the fan diameter D1 of fan 500 is set as 82 millimeters, determines the data relationship of common hub ratio and air quantity in such a situa-tion.Data show, along with the increase of hub ratio, air quantity reduces gradually, obtains good airflow effects for making hair-dryer 100, need hair-dryer 100 can provide a larger air quantity, and when selected hub ratio is 0.1-0.3, air quantity can obtain a larger numerical value, but the consequence brought to be wheel hub too little, and relative vane is larger, the noise produced when causing rotating is comparatively large, and the less stable of fan 500, be very easy to damage.And the stability selecting hub ratio not only can obtain a higher air quantity but also fan 500 when 0.3-0.5 better and the noise produced when rotating is also less.In this specific embodiment, hub ratio is set to 0.34.Other numerical value in 0.1-0.7 number range all can adopt, the numerical value especially within the scope of 0.3-0.5.
Fan 500 is arranged in housing 200, and fan 500 comprises the wheel hub 504 and multiple blade 502 be arranged on wheel hub 504 that connect with motor shaft 301, and the outer edge of the blade 502 of fan 500 is also provided with circumferential connecting band 503.Beeline between circumference connecting band 503 and housing 200 inwall is 0 millimeter to 5 millimeters (not comprising end points).Preferably, the beeline between circumferential connecting band 503 and housing 200 inwall is set as 1 millimeter, and such design can provide better airflow effects while guarantee fan 500 with housing 200 assembled condition.
In the present embodiment, hair-dryer 100 is longitudinally furnished with motor 300, fan 500, duct 400 and blower 600 etc. from upstream region 201 to downstream area 202.Housing 200 is also provided with air intake 203, and air intake 203 is positioned at upstream region 201, and arranges near fan 500, and the end of blower 600 is provided with the air outlet 601 finally blown out for air-flow.When fan 500 carries out rotary work under the driving of motor shaft 301, it is inner that extraneous air enters into housing 200 from air intake 203, then passes through the inside of duct 400 and blower 600, blow out from the air outlet 601 being positioned at downstream area 202.The blade 502 of fan 500 rotates the annular plane of rotation of formation one, and plane of rotation area is S1, and the area that the area of fan 500 deducts wheel hub 504 is exactly plane of rotation area S1.Blower 600 end is provided with air outlet 601, the area ratio of air outlet 601 area S2 and plane of rotation area S1 is within 0.75-1.1 scope, the flow behavior thus raising aspect of blowing efficiency that can improve air-flow are set like this, and hair-dryer 100 can keep higher wind speed, the loss of wind speed is less.
Table 2 lists the experiment air outlet area/plane of rotation area of gained and one group of data relationship of wind speed.During measuring, motor speed is constant is 24000 revs/min, and the constant area of air outlet is set as 3957MM
2, under the condition that motor speed and air outlet constant area set, determine a series of data in table 2.Data as can be seen from table 2, when air outlet area/plane of rotation area is set in the number range of 0.75-1.1, hair-dryer 100 can obtain a higher wind speed, and the loss of wind speed is less.
Table 2
In the present embodiment, the air quantity of hair-dryer 100 is greater than 370cfm, and such air quantity design can blow afloat the heavier leaf dropped in lawn and the leaf etc. being arranged in crack more easily.
Hair-dryer 100 comprises housing 200 and blower 600, and motor 300, fan 500 etc. are arranged in housing 200, blower 600 are provided with air outlet 601.Housing 200 and blower 600 connect, thus form the complete air channel that air-flow can be allowed to pass through.And the inwall angle α between the inwall of the housing 200 that blower 600 connects and the center line of blower 600 is less than or equal to 5 degree.And the outer wall angle β between the outer wall of the blower 600 that housing 200 connects and the center line of blower 600 is less than or equal to 5 degree.Such angle arranges the sectional area expanding the outlet of air-flow on housing 200, and after air-flow enters blower 600 simultaneously, the sectional area of passage is again diminishing trend.Such layout setting makes air-flow air quantity before entering blower 600 increase, and the wind speed entered after blower 600 has been got back enhancing, thus improves the aspect of blowing efficiency of hair-dryer 100 accordingly, can obtain a better airflow effects.
As shown in Figures 2 and 3, motor 300 is positioned at upstream region 201.That is, motor 300 is between air intake 203 and fan 500, and air intake 203 and fan 500 are positioned at the both sides of motor 300.And motor 300 and housing 200 keep certain spatial joint clearance.The air entered from air intake 203 first by the gap between motor 300 and housing 200, then by fan 500 driven rotary, thus can produce air-flow.Because the position of motor 300 setting is between air intake 203 and fan 500, air passes through all the time around motor 300, can produce extra cooling effect to motor 300.Therefore do not need additionally to arrange cooling fan, the radiating requirements of motor 300 is just met, and such design makes hair-dryer 100 structure simplify.Motor 300 is arranged on outside duct 400, and the size of duct 400 can be done smaller, and the size of duct 400 can not be subject to the size restrictions of motor 300.In other words, when designing the size of duct 400 without the need to considering the size restrictions of motor 300 again, thus the aspect of blowing efficiency of duct 400 can be promoted further.Motor 300 comprises the rotor 303 of stator 302 and relative stator 302 rotation.Rotor 303 is arranged around the motor shaft 301 extended longitudinally.Motor shaft 301 rotates around its axis.Motor shaft 301 power connects fan 500, thus drives fan 500 to rotate around fan axis 501.In the present embodiment, fan 500 is directly installed on motor shaft 301, and the axis of motor shaft 301 overlaps with fan axis 501.The motor 300 of the present embodiment is compared to traditional gasoline-fueled engine, and volume is less.Therefore vertical longitudinal cross-sectional area of motor 300 can be less than vertical longitudinal cross-sectional area of gas channel 602, and motor 300 can be placed in gas channel 602.In a preferred embodiment, vertical longitudinal cross-sectional area of motor 300 is 0.6 ~ 0.7 with the ratio of vertical longitudinal cross-sectional area of gas channel 602.
Because motor 300 is positioned at upstream region 201, motor 300 occupies certain space and volume, and air moves along gas channel 602, and gas channel 602 comprises several and crosses wind face.Crossing wind face is the cross section of gas channel 602 perpendicular to air-flow moving direction.In order to ensure enough intakes, the area of the plane of rotation that the blade rotation that the area crossing wind face minimum in upstream region 201 is greater than fan 500 is formed, can ensure that replenish air touches the blade of fan 500 endlessly like this, thus ensure that blowing is uninterrupted.Be similar to Law of Barrel, upstream region 201 supplements and depends on wind area excessively minimum in upstream region 201 to the size of the air capacity of fan 500.Even if therefore the wind area excessively in other places of upstream region 201 is large again, but wherein minimum wind face area still indeclinable words excessively, and the intake of fan 500 would not change.Therefore, promote the minimum of whole upstream region 201 and cross the intake that wind area could promote fan 500.Shown in Fig. 3 and Fig. 4, after air enters into upstream region 201 from air intake 203, because the part of upstream region 201 near air intake 203 does not stop, therefore the wind area excessively of this part can ensure the slewing area being greater than fan.In upstream region 201, the part of wound motor 300 is defined as circle zone 204, and owing to there being the stop of motor 300, the mistake wind area of circle zone 204 can be smaller.But in order to ensure good aspect of blowing efficiency, the minimum area crossed in wind area S4 longitudinally of circle zone 204 is designed to be greater than the area of the plane of rotation S1 of the blade 502 rotation formation of aerofoil fan.By test, the relation of ratio and airflow effects that the minimum mistake wind area S4 of circle zone 204 and the blade 502 of aerofoil fan rotate the plane of rotation S1 area formed is as following table:
Table 3
As can be seen here, when the minimum scope crossing the area ratio of the area of wind face S4 and the plane of rotation S1 of aerofoil fan of circle zone 204 changes between 1.5 to 2.5, the effect promoting of blowing is remarkable.When the minimum area ratio crossing the area of wind face S4 and the plane of rotation S1 of aerofoil fan of circle zone 204 is greater than 2, wind speed and air quantity have lifting by a small margin.But now area ratio is greater than 2, the minimum wind area excessively of circle zone 204 itself is larger, and the volume of corresponding whole hair-dryer 1 is also larger.Therefore in the present embodiment, the area ratio crossing the minimum area of wind face S4 and the plane of rotation S1 of aerofoil fan of circle zone 204 is 1.8.With this understanding, the air quantity that hair-dryer 100 blows out can reach 376CFM, and wind speed can reach 100MPH, and while meeting the designing requirement of hair-dryer 100 wind speed and air quantity, the volume of hair-dryer 100 is also in rational scope.
Upstream region 201, except comprising circle zone 204, also comprises the transitional region 205 between circle zone 204 and fan 500.Transitional region 205 is for guiding to fan 500 the air by circle zone 204.Air enters into transitional region 205 from circle zone 204, and then by contact fan 500 after transitional region 205.In a preferred embodiment, the inwall of the housing 200 at transitional region 205 place is smooth surface, thus effectively can reduce the loss of air-flow by transitional region 205.In addition, in order to ensure good aspect of blowing efficiency, the scope of the minimum ratio of wind area S5 and slewing area S1 excessively of transitional region 205 is between 1.5 to 2.5.Preferably, this ratio is 1.8.That is, the minimum wind area S5 of mistake of transitional region 205 and the minimum of circle zone 204 cross at least similar size of wind area S4, thus can ensure that a certain amount of air is by transitional region 205.In order to ensure that the minimum of transitional region 205 crosses wind area, the fore-and-aft distance L that between motor 300 and fan 500, interval is certain, this fore-and-aft distance L are 20 millimeters to 30 millimeters, and preferably, the fore-and-aft distance L between motor 300 and fan 500 is 25 millimeters.
Hair-dryer 100 also comprises the braced structures 800 for motor 300 is fixed with housing 200.Braced structures 800 is positioned at upstream region 201 equally, and braced structures 800 comprises the first support 801, second support 802 be longitudinally provided separately and the connector 803 longitudinally connecting the first support 801 and the second support 802.In the present embodiment, connector 803 is bolt.Bolt longitudinally couples together the first support 801 and the second support 802.
Please refer to Fig. 2, Fig. 3 and Fig. 5.First support 801 1 aspect self is fixedly connected with housing 200, plays a supportive role again on the other hand to motor 300.First support 801 is provided with inside fixed cell 804 and housing 200 and fixes clamping, simultaneously the first support 801 support motor 300.First support 801 comprises an inner ring 805 for fixed electrical machinery 300 and an outer ring 806 for stationary housing 200.Inner ring 805 and outer ring 806 are arranged with one heart, and further, inner ring 805 is centrally located on electrical axis with outer ring 806.The outer surface of outer ring 806 is provided with fixed cell 804.Longitudinal width of outer ring 806 is greater than longitudinal width of inner ring 805, and inner ring 805 is substantially contained in outer ring 806 and surrounds the space formed.Several support members 807 are provided with between inner ring 805 and outer ring 806.Support member 807 roughly extends along the radial direction of electrical axis 501.The connection outer ring, one end 806 of support member 807, the other end connects inner ring 805.These several support members 807 are uniformly distributed circumferentially, and the surrounding of each support member 807 is also provided with the first circulating area 808 being convenient to supplied gas circulation.In a preferred embodiment, the quantity of support member 807 is 4, and the angle between adjacent two support members is 90 degree.Inner ring 805 inside is also provided with the perforation 809 held motor shaft 301 and pass.Several reinforcing ribs 810 are provided with between perforation 809 and inner ring 805.Second circulating area 811 of supplied gas circulation is also set around reinforcing rib 810.
In another embodiment as shown in figure 12, hair-dryer 100, except having blowing function, also has air suction function.Therefore this hair-dryer 100 selectively switches to blowing mould formula or suction mode.Hair-dryer 100 has the blowing assembly 102 and air draught assembly 103 that can connect housing 200 respectively.Under blowing mould formula, blowing assembly 102 connects housing 200.Under suction mode, air draught assembly 103 connects housing 200.In the present embodiment, assembly 102 of drying comprises blower 600 and duct 400.Fan 500 is preferably also arranged in blowing assembly 102, and arranges near duct 400.Motor 300 is still arranged in housing 200, under blowing mould formula, gas channel is formed after blowing assembly 102 is connected with housing 200, motor 300 coordinates and produces with the fan 500 in blowing assembly 102 air-flow of drying, now motor 300 is still in upstream region 201, and duct 400 is in downstream area 202.And when this hair-dryer 100 is switched to suction mode, blowing assembly 102 disassembles from housing 200, change and air draught assembly 103 is installed on housing 200.Air draught assembly 103 and housing 200 form the gas channel for air-breathing.
In an other embodiment as shown in fig. 13 that, similar with the first embodiment, hair-dryer 100 includes housing 200, motor 300, duct 400, fan 500 and blower 600.Motor 300, duct 400 and fan 500 are all positioned at housing 200.In the present embodiment, motor 300, duct 400 and fan 500 longitudinally arrange successively.Particularly, the axis of motor 300 and the central axes of duct 400 and fan 500 are arranged.Fan 500 includes aerofoil fan, and aerofoil fan is between motor 300 and duct 400.In other words, motor 300 and duct 400 lay respectively at the relative side of fan 500, and wherein motor 300 is positioned at upstream region when fan 500 execution is dried, and duct 400 is positioned at downstream area accordingly.Blower 600 connects housing 200.And the position that blower 600 connects housing 200 is positioned at downstream area, be that is in the position with duct 400 homonymy.The position be positioned on housing 200 unlike, air intake 203 with the first embodiment is different.In the present embodiment, the axis of fan 500 is not by air intake 203.That is, air intake 203 is not positioned at the end of housing 200.Air intake 203 is arranged on the side of housing 200, and namely housing 200 is around the peripheral surface of the axis of fan 500.Air intake 203 can be arranged to annular opening, also can in the circumferential part opening.Thus make air intake 203 towards fan 500 axis between there is angle.Angle herein can be acute angle or obtuse angle.As shown in the arrow in Figure 13, after the air moving direction entered in housing 200 from air intake 203 produces certain bending, contact fan 500.
In another one embodiment as shown in figure 14, duct 400 and fan 500 are all positioned at housing 200.Motor 300 is positioned at electric machine casing 304, and electric machine casing 304 is not positioned at housing 200.Similar with a upper embodiment, air intake 203 is still positioned on housing 200.And end or the sidepiece of housing 200 can be preferably located in.In the present embodiment, electric machine casing 304 is arranged on the position of the side near housing 200.Therefore the axis of motor 300 and the axis of fan 500 non-coincidence setting.In this embodiment, the air entered from air intake 203 can't by motor 300.The cooling fan 305 for cooling motor 300 is also provided with in electric machine casing 304.Cooling fan 305 produces cooling blast separately.Transmission mechanism 306 is provided with between motor 300 and fan 500.Transmission mechanism 306 can comprise driving belt, gear train etc.
In another one embodiment as shown in figure 15, similar with a upper embodiment, motor 300 is accommodated in the independent electric machine casing 304 arranged, and electric machine casing 304 and housing 200 are provided separately.Transmission mechanism 306 is provided with between motor 300 and fan 500.Unlike, electric machine casing 304 is arranged on the position of the end face near housing 200.Therefore in this embodiment, the axis of motor 300 and the dead in line of fan 500 are arranged.And air intake 203 is arranged on housing 200, and end or the sidepiece of housing 200 can be preferably located in.In this embodiment, the air entered from air intake 203 can't by motor 300.Also cooling fan 305 is separately provided with in electric machine casing 304.Cooling fan 305 is for generation of the air-flow of cooling motor 300.Compared with a upper embodiment, transmission mechanism 306 can simplify, but the longitudinal length of entirety is long.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (21)
1. a hair-dryer, comprising:
Housing, described housing is provided with air intake, and air enters from described air intake;
Motor, is positioned at described enclosure interior;
Aerofoil fan, is driven by described motor and rotates along a fan axis and produce air-flow;
Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet,
Duct, moves to described air outlet for guiding air-flow;
It is characterized in that: in described housing and described blower, there is gas channel, described gas channel comprises from described air intake to the upstream region of described aerofoil fan and from described aerofoil fan to the downstream area of described air outlet, described motor is arranged at described upstream region, and described duct is arranged at described downstream area.
2. hair-dryer according to claim 1, is characterized in that: described air intake, described motor, described aerofoil fan and described duct longitudinally arrange successively.
3. hair-dryer according to claim 1, is characterized in that: described air intake overlaps with the small part that is projected to of described air outlet in the plane perpendicular to described fan axis.
4. hair-dryer according to claim 1, it is characterized in that: described gas channel comprises some wind faces excessively perpendicular to airflow passes direction, the minimum area crossing wind face of described upstream region is greater than the area of the plane of rotation of the blade rotation formation of described aerofoil fan.
5. hair-dryer according to claim 4, it is characterized in that: described upstream region comprises the circle zone arranged around described motor, described circle zone minimum cross wind face area and and the scope of the area ratio of plane of rotation that formed of the blade rotation of described aerofoil fan between 1.5 to 2.5.
6. hair-dryer according to claim 4, is characterized in that: described upstream region comprises the transitional region longitudinally between described motor and described aerofoil fan, and the inwall of the housing at described transitional region place is smooth surface.
7. hair-dryer according to claim 6, is characterized in that: the scope of the area ratio of the plane of rotation that the minimum mistake area in wind face of described transitional region and the blade rotation of described aerofoil fan are formed is between 1.5 to 2.5.
8. hair-dryer according to claim 6, is characterized in that: the fore-and-aft distance between described aerofoil fan and described motor is 25 millimeters.
9. hair-dryer according to claim 1, it is characterized in that: described hair-dryer also comprises the braced structures for supporting described motor, described braced structures comprise be fixedly connected with described housing outer ring, for fixing described motor inner ring and connect some support members of described inner ring and outer ring.
10. hair-dryer according to claim 9, is characterized in that: described some support members radial direction extends and is provided with the circulating area that air feed flows through between adjacent described some support members.
11. hair-dryers according to claim 10, is characterized in that: described inner ring there is centre bore that described motor shaft passes and from described center bore to the rib extended.
12. hair-dryers according to claim 1, is characterized in that: the cross-sectional area of described motor is 0.6 ~ 0.7 with the ratio of the cross-sectional area of described gas channel.
13. hair-dryers according to claim 1, is characterized in that: described air intake is provided with dismountable safety guard.
14. hair-dryers according to claim 13, is characterized in that: described safety guard is provided with labyrinth passage, make air enter enclosure interior along the travel path of bending.
15. hair-dryers according to claim 14, is characterized in that: described labyrinth passage comprises the first passage of longitudinal extension and the second channel with the angled setting of described first passage.
16. 1 kinds of suction and blowing devices, selectively work, comprising under blowing mould formula or suction mode:
Housing, described housing is provided with air intake, and air enters from described air intake;
Motor, is positioned at described enclosure interior;
Aerofoil fan, is driven by described motor and rotates along a fan axis and produce air-flow;
Blowing assembly and air draught assembly, can be connected to described housing;
Under blowing mould formula, described blowing assembly is connected with described housing, and described aerofoil fan rotates, and under suction mode, described air draught assembly is connected with described housing;
It is characterized in that: described blowing assembly comprises blower and duct, and described blower can connect described housing and have air outlet, and described air-flow blows out from described air outlet; Described duct moves to described air outlet for guiding described air-flow, in described housing and described blower, there is gas channel, described gas channel comprises from described air intake to the upstream region of described aerofoil fan and from described aerofoil fan to the downstream area of described air outlet, described motor is arranged at described upstream region, and described duct is arranged at described downstream area.
17. 1 kinds of hair-dryers, comprising:
Housing, described housing is provided with air intake, and air enters from described air intake;
Aerofoil fan, operationally rotates along a fan axis and produces air-flow;
Motor, rotates for driving described aerofoil fan;
Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet;
Duct, moves to described air outlet for guiding described air-flow;
It is characterized in that: described motor is positioned at described housing, described motor and described duct lay respectively at the relative both sides of described aerofoil fan, arranging towards with described fan axis angle of described air intake.
18. 1 kinds of hair-dryers, comprising:
Housing, described housing is provided with air intake, and air enters from described air intake;
Aerofoil fan, operationally rotates along a fan axis and produces air-flow;
Motor, rotates for driving described aerofoil fan;
Blower, connects described housing and has air outlet, and described air-flow blows out from described air outlet;
Duct, moves to described air outlet for guiding described air-flow;
It is characterized in that: described hair-dryer also comprises the electric machine casing receiving described motor, and described electric machine casing is positioned at the outside of described housing, in described electric machine casing, being provided with the cooling fan for cooling described motor.
19. hair-dryers according to claim 18, is characterized in that: described electric machine casing departs from described fan axis and arranges, and the axis of described motor is not overlapped with described fan axis.
20. hair-dryers according to claim 19, is characterized in that: be provided with transmission mechanism between described fan and described motor, and described transmission mechanism comprises driving belt or gear train.
21. hair-dryers according to claim 18, is characterized in that: described electric machine casing is arranged along fan axis, makes the axis of described motor and described fan dead in line.
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| CN201510622873.0A CN105442478B (en) | 2014-11-28 | 2015-09-25 | Hair-dryer |
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| CN2014107086855 | 2014-11-28 | ||
| CN201410708685 | 2014-11-28 | ||
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| CN201510064165X | 2015-02-06 | ||
| CN201510064165 | 2015-02-06 | ||
| CN201510622873.0A CN105442478B (en) | 2014-11-28 | 2015-09-25 | Hair-dryer |
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| CN108138455A (en) * | 2016-08-10 | 2018-06-08 | 苏州宝时得电动工具有限公司 | Garden hair-dryer |
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| WO2020192753A1 (en) * | 2019-03-27 | 2020-10-01 | 苏州宝时得电动工具有限公司 | Garden blower |
| WO2024032375A1 (en) * | 2022-08-12 | 2024-02-15 | 南京泉峰科技有限公司 | Air flow device and handheld hair dryer |
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Denomination of invention: Hair dryer Effective date of registration: 20230613 Granted publication date: 20171201 Pledgee: China Minsheng Bank Co.,Ltd. Zhangjiagang Sub branch Pledgor: POSITEC POWER TOOLS (SUZHOU) Co.,Ltd. Registration number: Y2023980043393 |
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