CN202820036U

CN202820036U - Hair dryer

Info

Publication number: CN202820036U
Application number: CN 201120447771
Authority: CN
Inventors: 伯努瓦·兰格兰; 弗兰克·芒迪卡; 马克·勒格雷恩
Original assignee: SEB SA
Current assignee: SEB SA
Priority date: 2010-11-15
Filing date: 2011-11-14
Publication date: 2013-03-27
Anticipated expiration: 2021-11-14
Also published as: FR2967335B1; EP2452584B1; FR2967335A1; ES2491102T3; EP2452584A1

Abstract

The utility model relates to a hair dryer which has an elongated tubular body (2) with a longitudinal axis delta. One end of the elongated tubular body (2), an outlet (4), is opened, and an air inlet (6) is arranged at the proximity of a rear end (5) opposite to the outlet (4). The hair dryer also comprises an electrically driven fan unit (10) which is arranged in the tubular body (2) and between the air inlet (6) and the outlet (4). The electrically driven fan unit (10) comprises an electric motor (16) that drives a rotor (11) along an axis parallel to or overlapping with the axis delta. The rotor (11) is situated in a work chamber (12) for sucking air from the inlet (6) and discharge air from the outlet (4). The electric motor (16) is on the downstream of the rotor along the air flowing direction. The air inlet is situated on the periphery of the axis delta, and the rotor (11) forms a centrifugal fan for sucking air into the work chamber (12) parallel to the longitudinal axis delta and for discharging the air perpendicular to the longitudinal axis.

Description

Hair dryer

Technical field

The utility model relates to the technical field of hair dryer, relates more specifically to the technical field by the manual hair dryer of professional and/or individual's use.

Background technology

Manually hair dryer generally comprises the lengthening tubular body, and this lengthening tubular body comprises the electric fan group that is formed by screw, and this screw is connected with the driving shaft of motor.Motor is maintained in the tubular body by rigid arm, and these rigid arm guarantee that screw is with respect to the inwall centering of tubular body.Tubular body often is equipped with handle, and this handle comprises the connecting line that is connected with electrical network and the parts of controlling motor operation.At the hair dryer duration of work, the import air amount at the rear portion of electric fan group by being positioned at tubular body is so that this air is discharged in the outlet of the front portion by being positioned at this tubular body.Hair dryer also often comprises in the downstream of screw blow air is carried out electrically heated mechanism.

This hair dryer main blows that to send out a function aspects be gratifying relating to it.Yet the shortcoming that known hair dryer has is that noise is large especially, and this causes tired when the professional uses for a long time, perhaps also user and people around thereof is produced adverse effect.

Therefore, obviously need a kind of novel hair dryer, this hair dryer has and is similar to according to the heating of the hair dryer of prior art and the performance of air mass flow, makes simultaneously influence of noise less.

The utility model content

In order to reach this purpose, the utility model relates to a kind of hair dryer, and this hair dryer comprises:

Lengthening tubular body with longitudinal axis △, it is open and comprises air intlet near the rearward end relative with outlet at an end (i.e. outlet);

The electric fan group, it is arranged in the tubular body and between import and outlet and comprise motor, motor drives rotor rotatably along axis parallel with axis △ or that overlap, rotor is positioned at the operating room and is adapted to pass through the import air amount and discharges this air by outlet, and motor is positioned at the downstream of rotor along the circulation of air direction.

According to the utility model, air intlet is positioned at the periphery (p é riph é rique) of longitudinal axis △, and rotor forms centrifugal ventilator, and centrifugal ventilator is suitable for being parallel to longitudinal axis △ air intake is discharged this air in the operating room and perpendicular to longitudinal axis.

Use this centrifugal ventilator to allow to obtain high internal pressure with equal volume, and air mass flow is similar to the air mass flow with screw or spirochetal ventilator, rotating speed is lower, and therefore, the noise that is produced by motor and rotor is not too large.It should be noted that the peripheral inlet of tubular body is that side direction is configured on the tubular body rather than the tubular body rear portion.The configuration that the air intlet of this periphery (non-tubular shape body rear portion) matches with centrifugal ventilator allows relative reduce to the noise of user ear, because should cooperate allow the noise decrease number that will produce at the hair dryer Background Region decibel, so as with this noise limit in the zone that more disperses around the hair dryer.Air intlet is not that (even partly) is on longitudinal axis △; Preferably, air intlet only is positioned at periphery, forms one or more openings at periphery at least in part, even 360 ° open.

According to the utility model, rotor can realize in different ways that for example, rotor comprises single sleeve, and the radial branching of support blade extends from this sleeve.According to a preferred embodiment of the present utility model, rotor comprises the driving-disc with axis △, the driving-disc support blade, and blade pass is crossed its side is connected and extends to from the middle section of driving-disc driving-disc with driving-disc at least one neighboring.

The advantage that this embodiment has is, allows the good air in the operating room to dredge, and driving-disc forms the base plate of this operating room.Therefore, need not between motor and operating room, stationary barrier to be set.

According to a modified example of this preferred embodiment, rotor comprises less than nine blades and preferably includes seven blades.In fact, the present utility model people's contribution is to illustrate below having done: when surpassing eight blades, ventilator produces larger noise, and the flow that has simultaneously is less than the flow that obtains with less blade.Also clearly, the quantity of seven blades allows for the best flow/noise of the acquisition of the rotating speed between 7000 rev/mins and 12000 rev/mins compromise.

According to another modified example of this preferred embodiment and in order further to optimize the work of ventilator, blade has the height that the △ that parallels to the axis measures, this height is between between 0.3 times and 0.5 times of the external diameter of rotor.Therefore, when ventilator had the diameter of about 65mm, blade for example can have the height that the △ that parallels to the axis measures, and this height is between 20mm and 30mm.Preferably, parallel to the axis height that △ measures between 22mm even 25mm and 30mm.The de-noising effect of pursuing occurs, because changed the area of blade, the inventor is ready to change blade height and is far more than its width.The inventor in fact confirms, change width of blade and do not change low-cost motor and do not add expensive additional bearing and will therefore increase the non-equilibrium effect of not expecting in the hair dryer.

Another modified example according to this preferred embodiment, each blade has the string of a musical instrument between inside fire attack edge (bord d ' attaque interne) and outer drain edge (bord de fuite externe), this string of a musical instrument forms a non-zero negative angle with the sagittal plane that is tangential to the inside fire attack edge, when hair dryer worked, positive direction was corresponding to the direction of rotation of rotor.This is implemented modified example and allows to form centrifugal ventilator, i.e. " reaction (à r é action) " ventilator, and this ventilator allows to obtain than having outlet pressure larger in the situation of straight radial structure at blade.The outlet pressure that increases the operating room allows to obtain the not too responsive ventilator flow of drag losses to being caused by the barrier that is positioned at the downstream, operating room, and these barriers for example are that air stream is corrected and the electric heating mechanism of dredging fin, blow air or also be useful on the nozzle of combing hair.

According to a modified example of the preferred embodiment that is intended to optimize Air Flow, rotor comprises annular flat-top on the opposite of driving-disc, and this annular flat-top is connected with blade and limits in the central circular suction port.This annular flat-top is avoided the air re-circulation phenomenon in the side edge of the blade that is positioned at the driving-disc opposite.

In the scope of this modified example, rotor has maximum outside diameter De, and air entry has inside diameter D a, and this maximum outside diameter De and inside diameter D a can determine following relation:

To guarantee best flow and pressure.

According to a feature of preferred embodiment, rotor has the maximum outside diameter De that is less than or equal to 65mm.

According to another feature of preferred embodiment, motor has and is less than or equal to 10000 rev/mins rotating speed.

According to an enforcement modified example that is intended to limit from the airborne noise transmission of electric fan group work, hair dryer comprises aspirating air pipe between air intlet and operating room, and aspirating air pipe has the axial length more than or equal to the inside diameter D a of air entry.

According to being intended to optimize Air Flow and limiting the feature of the present utility model of airborne noise transmission, hair dryer comprises the annular aspirating air pipe with central nucleus between air intlet and operating room.It should be noted that the cross section transverse to axis △ of pipeline is annular.

According to another feature of the present utility model, central nucleus have the external diameter that successively decreases towards the operating room.

According to another feature of the present utility model that also is intended to optimize Air Flow, driving-disc comprises central contact, and central contact has the diameter of the diameter of the adjacent part that is substantially equal to nuclear.

According to being intended to limit a particularly feature of the present utility model of the noise transmission in physical vibration source, central nucleus are formed by cellular material at least in part.

Implement modified example for one of the present utility model of the direct propagation of the airborne noise that produces according to the rotation and the motor that are intended to limit by ventilator, aspirating air pipe comprises that at least one air dredges the loop in advance, so that air is penetrated in the blade.

According to a feature of this modified example, be used for being convenient to air and penetrate into air in the blade and dredge in advance the loop and formed by the antinoise rib that at least one is approximately perpendicular to the outer wall of aspirating air pipe.

According to a feature of this modified example that is intended to limit drag losses, each rib limits centre gangway, and the diameter of centre gangway is more than or equal to the internal diameter of air entry.

Without detriment to another feature of this modified example of noise capturing function, at least one antinoise rib has spiral-shaped according to also being intended to optimize air circulation.

According to another feature of the present utility model, aspirating air pipe has inwall, and inwall is towards the air entry convergence of rotor.

According to a modified example of the present utility model that is intended to limit the noise transmission that is associated with motor operation, the outer surface of motor is surrounded by the shell that cellular material is made at least in part.

According to this feature implementing modified example, the shell of motor comprises opening and/or vent passages.

Of the present utility model another that the vibration of the motor when being intended to decay work is transmitted implemented modified example, hair dryer comprises that at least one is used to hang the suspension bracket of motor, suspension bracket comprises for the interior hoop that keeps motor and is bearing in outer hoop on the element of tubular body, interior hoop is coaxial with outer hoop and pass through at least two serpentine arms connections, and the serpentine arm has the flexible core of the circular arc that is parallel to interior hoop and outer hoop separately.The machinery that uses this suspension suspension bracket to allow to obtain between motor and the tubular body breaks away from, and guarantees that simultaneously motor is with respect to the best centering of the composed component of the encirclement motor of the tubular body of hair dryer.

According to a feature of the present utility model, hair dryer comprises that be used to the tubular cover of taking in motor tubular cover is positioned at the downstream of operating room and is maintained at tubular body by radial fins, and radial fins is guaranteed the dredging from the air of operating room.This cover is guaranteed dual-use function: keep motor and correct air stream from the operating room, in order to the radial flow in the exit of ventilator or rotor is converted to axial flow in the exit of tubular body.

As substituting of suspension bracket, the vibration transmission of the motor when decaying work, hair dryer can comprise: two foam rings, the dead in line of its axis and motor; And tongue piece, it is used for motor is held in place against rotor.

According to the propagation that is intended to the tubular body noise reduction by hair dryer and a feature of the present utility model of sending, the outer surface of tubular body forms by thick of cellular material at least in part.

Have an equal even more high performance hair dryer according to of the present utility model, influence of noise is less than the influence of noise according to the hair dryer of prior art.

For with objective way to by hair dryer when work and particularly with use hair dryer to blow the noise that the people who sends out sends when face-to-face to quantize, obviously needing aly provides the measurement rules of objective data according to reproducible operator scheme, and this operator scheme allows appropriately to compare between different hair dryers.

For this reason, the utility model also relates to and a kind of the noise that is sent by forward the hair dryer with longitudinal axis △ of outlet is carried out Appraising Methods, and the method may further comprise the steps:

-use the artificial head part with two microphones, one of them microphone to be placed on the Zuo Erchu of artificial head of every side of sagittal section (plan sagittal) S of the symmetry of head, another is placed on the auris dextra place;

-hair dryer rear side from the head in the time of will working is placed, export headward and D is in place from a distance with head, this distance B is between 5cm and 20cm, the longitudinal axis of hair dryer is included in the perpendicular V, the angled α of symmetrical sagittal section S of this perpendicular V and head, this angle [alpha] is between 30 ° and 50 °;

-longitudinal axis of hair dryer is positioned in the horizontal plane by microphone, then measure left acoustic pressure and right acoustic pressure and calculate the mean value dB1 of this twice measurement by microphone;

-be positioned at the longitudinal axis of hair dryer in the clinoplain P with going out mouth down, the angled β of this clinoplain P and horizontal plane, then this angle beta is measured left acoustic pressure and right acoustic pressure and is calculated the mean value dB2 of this twice measurement by microphone between 30 ° and 50 °.

The enforcement of this twice measurement allows to obtain the first objective indication of the noise that sent by hair dryer.These measurements are appropriate, are particularly considering that hair dryer centers on its longitudinal axis and sends in the situation of noise with symmetric mode.

In order to improve these measurements and to consider that particularly possible noise sends asymmetry, according to an enforcement modified example, the method is further comprising the steps of:

-hair dryer another rear side from the head in the time of will working is placed, and exports headwardly and in place with head partition distance D, and the longitudinal axis of hair dryer is included in the vertical plane V ' with respect to the symmetrical sagittal section S symmetry of head T of plane V;

-longitudinal axis of hair dryer is positioned in the horizontal plane H, then measure left acoustic pressure and right acoustic pressure and calculate the mean value dB3 of this twice measurement by microphone;

-longitudinal axis of hair dryer is positioned in the clinoplain P with going out mouth down, then measure left acoustic pressure and right acoustic pressure and calculate the mean value dB4 of this twice measurement by microphone.

According to a feature of embodiment, the method may further comprise the steps: the mean value of the mean value of calculated value dB1 and dB2 or value dB1, dB2, dB3 and dB4.

According to another feature that is intended to carry out for another people being blown the hair dryer user who sends out the embodiment of influence of noise quantification, according to the utility model, this evaluation method may further comprise the steps: with the distance B between 15cm and 30cm ' be positioned at the rear portion of hair dryer and acoustic pressure dB5 is measured at the some place on longitudinal axis.

Certainly, different characteristic of the present utility model, embodiment and enforcement modified example are can be at them compatible with each other or be associated with each other according to various combination in the not exclusive situation each other.

Description of drawings

In addition, to understand various further feature of the present utility model from the detailed description of carrying out referring to accompanying drawing, these accompanying drawings illustrate according to the non-limiting embodiment of hair dryer of the present utility model and the non-limiting embodiment that the work noise of this hair dryer carried out Appraising Methods.

Fig. 1 is the schematic longitudinal sectional view according to hair dryer of the present utility model.

Fig. 2 is the schematic perspective view of integral body of the electric fan group of hair dryer shown in Figure 1.

Fig. 3 is the schematic perspective view of ventilator of the electric fan group of hair dryer shown in Figure 2.

Fig. 4 is the axial cutaway view of ventilator shown in Figure 3.

Fig. 5 is the schematic perspective view that the antinoise rib is shown, and this antinoise rib is used for being arranged in the aspirating air pipe of hair dryer shown in Figure 1.

Fig. 6 is the schematic perspective view that the motor of electric fan group shown in Figure 2 is shown, and this motor links to each other with two suspension suspension brackets.

Fig. 6 ', Fig. 6 " and Fig. 6 " ' be the schematic perspective view that the motor of electric fan group shown in Figure 2 is shown, this motor links to each other with two retainer rings.

Fig. 7 is the schematic perspective view of suspension suspension bracket that the motor of electric fan group is shown.

Fig. 8 is the schematic perspective view that the method for measuring the noise that is sent by hair dryer is shown.

The specific embodiment

According to the utility model, shown in Figure 1 and whole hair dryer by label 1 expression comprises the rotational symmetric lengthening tubular body 2 roughly along longitudinal axis △, and except relating to handle 3, handle 32 extends along the direction that is approximately perpendicular to axis △ from tubular body.Tubular body 2 can be formed by a plurality of parts, and for example with the form realization of two plastic half shells, this two and half shell is along assembling by the axial plane of handle 3 and being replenished by a plurality of inserts.

Tubular body 2 forwardly comprises the end 4 for the opening of air outlet slit.Outlet 4 has the circular shape, and certainly, air outlet slit 4 can also have ellipse or rectangular shape.Tubular body 2 also with outlet 4 relative rearward end 5 near have ambient air import 6, this air intlet 6 extends on the part of tubular body 2 or around whole.

In order to ensure by outlet 4 blow air, hair dryer 1 comprises electric fan group 10, and electric fan group 10 is arranged in the tubular body 2 and in import 6 with export between 4.Electric fan group 10 comprises rotor 11, and rotor 11 is positioned at operating room 12, and operating room 12 is connected with air intlet 6 by aspirating air pipe 13 on the one hand, is connected with air outlet slit 4 by gassing pipe 14 on the other hand.Rotor 11 is connected with the driving shaft 15 of the motor 16 of the inside that is arranged on gassing pipe 14.

According to an essential characteristic of the present utility model, rotor 11 forms centrifugal ventilator, centrifugal ventilator is suitable for air with pipeline 13 and is parallel to longitudinal axis △ and is drawn in the operating room 12 and radially discharges these air, in order to enter gassing pipe 14 after 90 ° of periphery wall 17 deflections by operating room 12.

According to example, as shown in Figures 2 and 3, rotor 11 comprises driving-disc 20, and driving-disc 20 is positioned at the sidepiece of motor 16 and limits the base plate of operating room 12, is used for operating room 12 is separated with motor 16 and gassing pipe 14.Rotor 11 comprises seven blades 21, and these seven blades 21 extend perpendicular to the driving-disc relative with motor 16 20.Observe in axial plane, these seven blades 21 have arc-shaped cross-section, as shown in Figure 4.Each blade 21 has string of a musical instrument C, and string of a musical instrument C extends attacking between edge 23 and the drain edge 24, attacks the middle section that edge 23 is positioned at driving-disc 20, drain edge 24 be positioned at driving-disc 20 the neighboring near.According to example, the string of a musical instrument C of each blade 21 with form a non-zero negative angle A by the sagittal plane R that attacks accordingly edge 23, in this case, non-zero negative angle A is about-90 °.The positive direction of angular surveying is corresponding to the direction of rotation of the rotor 11 shown in the arrow F1.This configuration of blade allows to realize centrifugal ventilator, i.e. " reaction " ventilator, and this centrifugal ventilator allows to obtain than having pressure high in the situation of basic straight shape at blade in outlet of operating room.Outlet in operating room 12 obtains high pressure and allows to obtain the air stream not too responsive to the drag losses in the gassing pipe 14.

In order to increase the aerodynamic quality of rotor 11, also use annular flat-top 25, annular flat-top 25 is connected with blade 21 and limits in the central circular suction port 26.For making 25 pairs of rotor performance of annular flat-top not have negative effect, the inside diameter D a of air entry 26 is chosen to equal at least 0.6 times of outer diameter D e of rotor 11.

In the main body for the hair dryer that can be integrated in reasonable size, rotor can be selected to the outer diameter D e that has less than 70mm, for example about 65mm.

Always on the direction of the aerodynamic optimization of rotor and at rotor, be used for to carry out between the rotating speed between 7000 rev/mins and 12000 rev/mins in the situation of work, the size of blade 21 is determined to be has the axial height h that the △ that parallels to the axis measures, and this axial height h is between between 0.30 times and 0.5 times of the outer diameter D e of rotor.In the situation of the rotor of the about 65mm of external diameter, blade 21 is implemented to has height h, and this height h is between 20mm and 30mm, preferably between 22mm and 30mm.In order to limit airborne noise and vibration, the rotating speed of this rotor 11 preferably is selected to and is less than or equal to 10000 rev/mins.

For limit noise directly propagates into outside the aspirating air pipe 13, this aspirating air pipe 13 is implemented to has axial length l, and this axial length l is more than or equal to the inside diameter D a of air entry 26.Referred in when work length suitable with the length of the passage (pavillon) of fluid process by " the axial length l " shown in the curved arrow at Fig. 1.

In order further to optimize noise attentuation, aspirating air pipe 13 comprises central nucleus 30, and these central nucleus 30 give aspirating air pipe 13 1 kinds of annular shape that are substantially to operating room 12 from air intlet 6.The surface of defining the nuclear 30 of aspirating air pipe 13 has a kind of Rotational Symmetry shape with axis △ according to example, and this Rotational Symmetry shape has recessed bus, so that the external diameter of central nucleus 30 12 successively decreases towards the operating room.In order to ensure with nuclear 30 air force continuity, driving-disc 20 comprises central contact 31, central contact 31 has the diameter of the diameter of the part adjacent with central contact that is substantially equal to nuclear 30.By using at least in part cellular material (for example take the polyurethane foam of polyester as the basis) to make nuclear, can further strengthen examining 30 noise reduction effect.

Nuclear 30 can be formed by the rigid crust of having filled at least in part described cellular material.The form of the moulded parts that nuclear also can be made with this cellular material realizes.

According to example, the noise of aspirating air pipe 13 also limits by at least one pre-dredging loop is set towards the propagation of outside, and this is dredged in advance the loop and penetrates blade (direction of rotation that depends on rotor) for being convenient to air.This air is dredged in advance loop (32,33) and is formed by at least one antinoise rib 32, and this antinoise rib 32 is approximately perpendicular to the outer wall 33 of aspirating air pipe 13.According to example, antinoise rib 32 is made of spiral-shaped inserts shown in Figure 5.In order not have in damnous effect aspect the air force, rib 32 may be embodied to and limits a freely centre gangway 34, and the external diameter of this centre gangway 34 is more than or equal to the inside diameter D a of air entry 26.Certainly, centre gangway 34 can also have the external diameter of the internal diameter that is less than or equal to air entry 26, and in this case, air intake passage or pipeline 13 are implemented to the diameter that has at air entry 26 places more than or equal to the inside diameter D a of this air entry 26.It is further noted that according to example the outer wall 33 of aspirating air pipe 13 is towards air entry 26 convergences.

Noise transmission and the vibration of motor 16 when being limited in work, hair dryer 1 comprises tubular cover 40, motor 16 is enclosed in this tubular cover 40.Tubular cover 40 has the rotational circle cylindricality shape around axis △.Tubular cover 40 is centered in the inside of gassing pipe 14 by the coaxial surrounding section (ceinture coaxiale) 41 against the inwall of gassing pipe 14.Be connected to each other by radial fins 42 around section 41 and tubular cover 40, radial fins 42 be formed for making air at cover 40 and the space of passing through between around section 41 and dredging from the air of operating room 12, in order to stop its possible eddy motion.

It is that two discs 45 by illustrated in figures 1 and 2 guarantee that these two discs 45 are to use cellular material (for example with the polyurethane foam of polyester as raw material) to make that motor 16 is enclosed in the tubular cover 40.

According to example and as Fig. 2 more specifically shown in, the outer surface of motor 16 also is coated with or is surrounded by thick 46 of cellular material.Shell by disc 45 and thick 46 motor that forms preferably includes ventilation orifice and/or vent passages 47, in order to allow the heat of discharging motor 16 and therefore guarantee that motor 16 has gratifying service life.

Arrive the remainder of tubular cover 2 for the Vibration propagation of restrictions motor 16, use at least one and hang suspension brackets 50 motor 16 is remained in the cover 40 according to being exemplified as two shown in better of Fig. 6, this suspensions suspension bracket 50 is guaranteed motor 16 and is covered machinery disengaging between 40.As shown in Figure 7, each hangs suspension bracket 50 and comprises interior hoop 51, and this interior hoop 51 is assemblied in around the motor 16 with fastening means.Each suspension bracket 50 also comprises the outer hoop 52 on the inwall that is resisted against cover 40.Should be noted that from the utility model, cover 40 is composed components of tubular body 2, even in cover 40 situations about being consisted of by the parts that are embedded in this tubular body 2, also be the same.Interior hoop 51 is by at least two and be connected with outer hoop 52 according to being exemplified as three arms 53, and these three arms 53 have the generally'S '-shaped shape.Each arm has flexible core 54, and flexible core 54 is parallel to

hoop

51 and 52 and guarantee vibration attenuation at the duration of work of motor 16.

Alternatively, such as Fig. 6 ', Fig. 6 " and Fig. 6 " ' shown in, in order to decay in the vibration transmission of when work motor, fixing can at the both ends of motor utilize of motor on the stator support of hair dryer is configured in two foam axle bush rings 71,72 of each side of motor and utilizes tongue piece 70 to carry out, these two axle bush rings 71,72 axis and the dead in line of motor 16, tongue piece 70 a little distortion and against rotor 11 are in order to be held in place motor 16 and guarantee vibration proof.

Hair dryer 1 also comprises the electric heating mechanism 55 of blow air in the downstream of electric fan group 10.Heating arrangements 55 can be with any suitable method and is for example realized that with the form of heating resistor this heating resistor is kept by radial fins, radial fins by insulating materials for example mica sheet make.

For the work noise of the hair dryer 1 that helps to decay, at least some part of the outer surface of main body can also use cellular material (for example with the polyurethane foam of polyester as raw material) to make.

According to the utility model, the hair dryer 1 that consists of like this with equal heating properties and air mass flow, send beguine and carry out work according to the few noise of the hair dryer of prior art.Others is blown send out or also relate to the user and self is blown in the situation about sending out the sound performance of hair dryer has been made the objective comparison basis of considering in order to have benefited from gripping hair dryer the personnel of relating to, the utility model proposes a kind of measuring method, this measuring method allows the acoustic pressure that is subject to by environment is carried out objective quantification.

For to being quantized by blow the noise that the personnel that send out are subject to by hair dryer, propose to use artificial head part T shown in Figure 8.Artificial cephalad T is equipped with two microphones 60, and one of them is arranged in the auris dextra of head T, and another is arranged in the left ear of head T.Microphone 60 is connected with processing unit with not shown measurement, and this measurement allows to measure with processing unit carries out different calculating in the acoustic pressure at each microphone place and according to measured value.

In order to realize that first measures dB1, hair dryer 1 in the work is placed on the primary importance P1 right part for example of the rear side of head T, longitudinal axis △ is included in the horizontal plane H by microphone 60, the angled α of the symmetrical sagittal section S of longitudinal axis △ and head T, this angle [alpha] for example equals 45 ° between 30 ° and 50 °.

In order to realize that second measures dB2, make the hair dryer 1 in the work be elevated to second place P2, so that it goes out the direction that mouth down points to head T.At this second place P2, longitudinal axis △ is positioned at clinoplain P, clinoplain P and the angled β of horizontal plane H that is dissecing by the straight line place of microphone 60.Angle beta has for example equal 45 ° value between 30 ° and 50 °.At second place P2, longitudinal axis △ is with sagittal section S formation and in the identical angle [alpha] of position P1.

Also implemented the 3rd at the 3rd position P3 with respect to sagittal section S and primary importance P1 symmetry and measured dB3.Implemented the 4th at the 4th position P4 with respect to sagittal section S and second place P2 symmetry at last and measured dB4.Can notice that at position P1 and P2, longitudinal axis △ is included in the same perpendicular V, and at position P3 and P4, longitudinal axis △ is included in the same perpendicular V ' with respect to sagittal section S and perpendicular V symmetry.

Should be noted that, each position in the P1～P4 of measuring position, outlet 4 separates a distance B setting with the outer surface of head T, and distance B is measured along axis △, between 5cm and 20cm, for example equals 10cm.

Each is worth dB1 to dB5 and is equivalent to sound pressure measurement value sum for two microphones 60 of corresponding each position.

In order to provide comprehensive notes and commentary, can use the mean value MdB of measured value dB1 to dB2 or measured value dB1 to dB4.

Therefore, has about 68m according to of the present utility model ³In the situation of the hair dryer of/h flow and the about 1800W of heating power, mean value MdB has the value of about 69dB, and for the hair dryer with same traffic and identical heating power according to prior art, mean value MdB has the value of about 75dB.

The evaluation that the noise that is produced at work by hair dryer is carried out can replenish by measuring at the rear portion of hair dryer partition distance D ' and some acoustic pressure dB5 at place of being positioned on the longitudinal axis △, this distance B ' between 15cm and 30cm, for example equal 20cm.This measured value dB5 is to having done consideration by using hair dryer 1 that others is blown the noise that the user that sends out is subject to.

According to above-mentioned illustrated example, the composed component of tubular body for example tubular body shell, cover 40 and to examine 30 are independent components.Yet these different elements can be the parts that consists of two shells of shell.According to example, insufflation channel is limited in exporting 4 places equally.Certainly, this configuration is dispensable according to hair dryer of the present utility model to realizing, insufflation channel 14 can have constant cross section in its whole length.

Certainly, can be within the scope of the appended claims to carry out various other changes according to hair dryer of the present utility model.

Claims

1. hair dryer, described hair dryer comprises:

Lengthening tubular body (2) with longitudinal axis △, it is open in end as outlet (4) and comprises air intlet (6) near the rearward end (5) relative with described outlet (4);

The electric fan group, (10), it is arranged on described tubular body, (2) in and be positioned at described import, (6) and described outlet, (4) between and comprise motor, (16), described motor, (16) drive rotatably rotor along axis parallel with described axis △ or that overlap, (11), described rotor, (11) be positioned at the operating room, (12) in and be adapted to pass through described import, (6) air amount is also by described outlet, (4) discharge described air, described motor, (16) be positioned at described rotor along the circulation of air direction, (11) downstream

It is characterized in that, described air intlet (6) is positioned at the periphery of described longitudinal axis △, and described rotor (11) forms centrifugal ventilator, and described centrifugal ventilator is suitable for being parallel to described longitudinal axis △ air intake is discharged described air in described operating room (12) and perpendicular to described longitudinal axis.

2. hair dryer according to claim 1, it is characterized in that, described rotor (11) comprises the driving-disc (20) with axis △, described driving-disc (20) support blade (21), described blade (21) are connected and extend to from the middle section of described driving-disc (20) at least one neighboring of described driving-disc (20) with described driving-disc by its side.

3. hair dryer according to claim 2 is characterized in that, described rotor (11) comprises less than nine blades (21).

4. hair dryer according to claim 3 is characterized in that, described rotor (11) comprises seven blades (21).

5. each described hair dryer in 4 according to claim 2, it is characterized in that, described blade (21) has and is parallel to the height (h) that described axis △ measures, and described height (h) is between between 0.3 times and 0.5 times of the external diameter (De) of described rotor (11).

6. each described hair dryer in 4 according to claim 2 is characterized in that, described blade (21) has and is parallel to the height (h) that described axis △ measures, and described height (h) is between 20mm and 30mm.

7. each described hair dryer in 4 according to claim 2, it is characterized in that, each blade (21) has the string of a musical instrument (C) between inside fire attack edge (23) and outer drain edge (24), the described string of a musical instrument (C) forms a non-zero negative angle (A) with the sagittal plane (R) that is tangential to described inside fire attack edge (23), when described hair dryer normal operation, positive direction is corresponding to the direction of rotation (F1) of described rotor (11).

8. each described hair dryer in 4 according to claim 2, it is characterized in that, described rotor (11) comprises the annular flat-top (25) that is connected with described blade on the opposite of described driving-disc (20), described annular flat-top (25) limits circular suction port (26) in the central.

9. hair dryer according to claim 8 is characterized in that, described rotor (11) has maximum outside diameter (De), and described air entry (26) has internal diameter (Da), relation below described maximum outside diameter (De) and described internal diameter (Da) are determined:

10. hair dryer according to claim 8 is characterized in that, described rotor (11) has the maximum outside diameter (De) that is less than or equal to 65mm.

11. hair dryer according to claim 9 is characterized in that, described motor (16) has and is less than or equal to 10000 rev/mins rotating speed.

12. hair dryer according to claim 11, it is characterized in that, described hair dryer comprises aspirating air pipe (13) between described air intlet (6) and described operating room (12), described aspirating air pipe (13) has the axial length (l) more than or equal to the described internal diameter (Da) of described air entry (26).

13. hair dryer according to claim 12 is characterized in that, described hair dryer comprises the have central nucleus annular aspirating air pipe (13) of (30) between described air intlet (6) and described operating room (12).

14. hair dryer according to claim 13 is characterized in that, described central nucleus (30) have the external diameter that successively decreases towards described operating room.

15. hair dryer according to claim 14 is characterized in that, described driving-disc (20) comprises central contact (31), and described central contact (31) has the diameter of the diameter of the adjacent part that is substantially equal to described nuclear (30).

16. hair dryer according to claim 15 is characterized in that, described central nucleus (30) are formed by cellular material at least in part.

17. hair dryer according to claim 16 is characterized in that, described aspirating air pipe (13) comprises that at least one air dredges loop (32,33) in advance, so that air is penetrated in the described blade.

18. hair dryer according to claim 17 is characterized in that, described air is dredged in advance loop (32,33) and is formed by the antinoise rib (32) that at least one is approximately perpendicular to the outer wall (33) of described aspirating air pipe (13).

19. hair dryer according to claim 18 is characterized in that, each rib (32) limits centre gangway (34), and the diameter of described centre gangway (34) is more than or equal to the internal diameter (Da) of described air entry (26).

20. hair dryer according to claim 19 is characterized in that, at least one antinoise rib (32) has spiral-shaped.

21. hair dryer according to claim 20 is characterized in that, described aspirating air pipe (13) has inwall (33), and described inwall (33) is towards described air entry (26) convergence of described rotor (11).

22. each described hair dryer in 4 is characterized in that according to claim 1, the shell that the outer surface of described motor (16) is made by cellular material at least in part (46,45) surrounds.

23. hair dryer according to claim 22 is characterized in that, the described shell of described motor (16) comprises opening and/or vent passages (47).

24. each described hair dryer in 4 according to claim 1, it is characterized in that, described hair dryer comprises that at least one is used to hang the suspension bracket of described motor (16) (50), described suspension bracket (50) comprises be used to the interior hoop (51) that keeps described motor and is bearing in outer hoop (52) on the element of described tubular body (2), described interior hoop (51) is with to be connected outer hoop (52) coaxial and connect by at least two serpentine arms (53), and described serpentine arm (53) has the flexible core (54) of the circular arc that is parallel to described interior hoop (51) and described outer hoop (52) separately.

25. each described hair dryer in 4 according to claim 1, it is characterized in that, described hair dryer comprises be used to the tubular cover of taking in described motor (16) (40), described tubular cover (40) is positioned at the downstream of described operating room (12) and is maintained at described tubular body by radial fins (42), and described radial fins (42) is guaranteed the dredging from the air of described operating room (12).

26. each described hair dryer in 4 is characterized in that described hair dryer comprises: two foam rings (71,72), the dead in line of the axis of described two foam rings and described motor (16) according to claim 1; And tongue piece (70), it is used for described motor (16) is held in place against described rotor (11).

27. each described hair dryer in 4 is characterized in that the outer surface of described tubular body (2) forms by thick of cellular material at least in part according to claim 1.