CN212479700U - Fan and hairdryer - Google Patents
Fan and hairdryer Download PDFInfo
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- CN212479700U CN212479700U CN202020808488.1U CN202020808488U CN212479700U CN 212479700 U CN212479700 U CN 212479700U CN 202020808488 U CN202020808488 U CN 202020808488U CN 212479700 U CN212479700 U CN 212479700U
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Abstract
The application discloses fan and hairdryer, the fan includes: the air duct is hollow along the axial direction of the air duct, and is provided with an air inlet and an air outlet; the wind wheel is arranged inside the wind barrel; the guide vane assembly is arranged inside the air duct and is arranged adjacent to the wind wheel; the inner wall of the air duct comprises an air inlet section, a sleeving section and an air outlet section which are sequentially connected in the air inlet direction from the air inlet to the air outlet, and the wind wheel and the guide vane assembly are arranged on the sleeving section; the air inlet section is provided with a reducing area, the reducing area extends to form an air inlet, and the reducing area is used for reducing the pressure of air flow entering the wind wheel; the air outlet section is provided with a flaring area, the flaring area extends to form an air outlet, and the flaring area is used for diffusing the air flow flowing out of the guide vane assembly. Through the mode, the fan in the application can enable the air volume to still meet the use requirement under the condition that the rotating speed is not increased.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a fan and an electric hair drier.
Background
The electric hair drier plays a drying role by generating wind with specific temperature, after the electric hair drier is powered on, the motor drives the fan blades of the fan to rotate, air is sucked from the air inlet and heated by the electric heating element to form hot wind, and then the hot wind is blown out from the air outlet. The existing hair dryer develops towards the direction of small diameter and short machine body, and the diameter of the whole fan inside the hair dryer is required to be reduced, so that the rotating speed of the fan must be increased when the air quantity of the fan is required to be ensured, the noise is increased, and the experience of a user is influenced. Therefore, there is a need to develop a blower and a hair dryer.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned technique, this application provides a fan and hairdryer, can improve the air-out performance.
In order to solve the technical problem, the technical scheme adopted by the application is as follows:
a blower, comprising: the air duct is hollow along the axial direction of the air duct so as to form a hollow cavity penetrating through the air duct, and the air duct is provided with an air inlet and an air outlet; the wind wheel is arranged in the wind barrel and used for blowing the wind barrel to form high-speed airflow; the guide vane assembly is arranged inside the air duct and is arranged adjacent to the wind wheel, and the guide vane assembly is used for rectifying the airflow entering the air duct; the inner wall of the air duct comprises an air inlet section, a sleeving section and an air outlet section which are sequentially connected in the air inlet direction from the air inlet to the air outlet, and the wind wheel and the guide vane assembly are arranged on the sleeving section; the air inlet section is provided with a reducing area, the reducing area extends to form the air inlet, and the reducing area is used for reducing the pressure of air flow entering the wind wheel; the air outlet section is provided with a flaring area, the flaring area extends to form the air outlet, and the flaring area is used for diffusing the air flow flowing out of the guide vane assembly.
Preferably, the air intake section includes: the first straight area is approximately parallel to the axial direction of the air duct; the first inclined surface area is respectively connected with the first straight area and the sleeving connection section and is arranged at a first included angle with the axial direction of the air duct so as to form the necking area; wherein the first inclined area is far away from the air inlet compared with the first straight area.
Preferably, the socket section comprises a second straight area and a third straight area which are substantially parallel to the axial direction of the air duct, and the second straight area is respectively connected with the first inclined area and the third straight area; the second straight area is far away from the air outlet section than the third straight area, the caliber of the second straight area is smaller than that of the first straight area, the wind wheel is installed in the second straight area, and the guide vane assembly is installed in the third straight area.
Preferably, the air outlet section includes: the fourth straight area is approximately parallel to the axial direction of the air duct; the second inclined surface area is respectively connected with the third straight area and the fourth straight area and is arranged at a second included angle with the axial direction of the air duct so as to form the flaring area; the second inclined surface area is far away from the air outlet compared with the fourth straight area, and the caliber of the fourth straight area is larger than that of the third straight area.
Preferably, the necking area is an arc or an arc chain formed by smoothly connecting a plurality of arcs; or the necking area is a straight line or a broken line formed by a plurality of straight lines.
Preferably, the wind wheel is close to the air inlet section, the wind wheel comprises a hub connected with an output shaft of the motor and blades arranged on the outer wall of the hub at equal intervals along the circumferential direction of the hub, and the number of the blades is n1(ii) a The blade is configured in a manner that the section of the blade in the circumferential direction of the hub is in a circular arc shape, and the chord length B corresponding to the section increases along with the increase of the diameter D of the blade; the number n of blades1The chord length B and the blade diameter D satisfy the following relations: 0.35<（B*n1/D）<0.48。
Preferably, the blade has a blade root portion connected to the hub and a blade tip portion disposed away from the blade root portion, wherein a gap between the blade tip portion and an inner wall of the air duct gradually decreases along an air intake direction.
Preferably, the hub is connected with an output shaft of the motor through a knurled nut; wherein, wheel hub's external diameter is the situation of grow gradually on the air inlet direction, wheel hub's the projection of outer peripheral face on the axial direction is a smooth arc line chain that an pitch arc or multistage pitch arc are constituteed.
Preferably, the guide vane assembly is arranged close to the air outlet section, the guide vane assembly comprises a motor fixing seat supporting the motor and a guide vane arranged on the outer wall of the motor fixing seat, and the guide vane is connected with the inner wall of the air duct so as to fix the motor to the air duct; the air duct, the motor fixing seat and the hub are coaxially arranged.
In order to solve the above technical problem, another technical solution adopted by the present application is:
a hair drier comprises the fan.
Compared with the prior art, the application has the beneficial effects that:
the application provides a fan and hairdryer, the air inlet department of its fan is equipped with the throat district, air outlet department is equipped with the flaring district, and the throat district can step down the air current that gets into the wind wheel, and the flaring district is used for carrying out the diffusion to the air current that flows out stator subassembly to make the fan under the condition that does not increase the rotational speed, the amount of wind still can reach the user demand, and has effectively solved the noise problem.
Drawings
Fig. 1 is a schematic perspective view of a fan according to the present application;
FIG. 2 is an exploded schematic view of a wind turbine of the present application;
FIG. 3 is a schematic cross-sectional view of an embodiment of a wind turbine of the present application;
FIG. 4 is a schematic view of an embodiment of the first sloped region L2 in the present application;
FIG. 5 is one of the schematic illustrations of another embodiment of the first sloped region L2 in the present application;
FIG. 6 is a second schematic view of another embodiment of the first sloped region L2 of the present application;
FIG. 7 is a schematic view of a further embodiment of the first sloped region L2 in the present application;
FIG. 8 is an enlarged schematic view of region A in FIG. 7;
figure 9 is a schematic perspective view of a wind rotor in the present application;
figure 10 is a schematic view of the front view direction of the wind rotor in the present application;
FIG. 11 is a schematic cross-sectional view taken along line C-C of FIG. 10;
FIG. 12 is a schematic structural view of a blade of the present application;
FIG. 13 is a structural schematic view of a guide vane in the present application;
FIG. 14 is a blade profile schematic of a conventional vane profile;
fig. 15 is a schematic structural view of the hair dryer of the present application.
Detailed Description
The present application will now be described in further detail with reference to the accompanying drawings, whereby one skilled in the art can, with reference to the description, make an implementation. If in the embodiments of the present application there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present application, it is also to be noted that, unless otherwise specified or limited more specifically, the terms "disposed" and "connected" are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
In addition, if the meaning of "and/or" appears in the application, three parallel schemes are included, and the example of "A and/or B" includes the scheme A, the scheme B or the scheme A and the scheme B which are satisfied simultaneously. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
The existing hair drier develops towards the direction of small diameter and short machine body, and the diameter of the whole fan is necessarily required to be reduced, so that the rotating speed of the whole fan needs to be increased when the air quantity of the fan needs to be guaranteed, noise is increased, and the experience of a user is influenced.
In view of the above, the present application provides a fan, please refer to fig. 1 to fig. 3, fig. 1 is a schematic structural diagram of the fan in the present application, fig. 2 is a schematic exploded structural diagram of the fan in the present application, fig. 3 is a schematic cross-sectional diagram of the fan in the present application according to an embodiment, including: the air duct 100 is arranged in a hollow manner along the axial direction of the air duct 100 to form a hollow cavity penetrating through the air duct 100, and the air duct 100 is provided with an air inlet 140 and an air outlet 150; the wind wheel 400 is arranged inside the wind barrel 100 and used for blowing the wind barrel 100 to form high-speed airflow; the guide vane assembly 200 is arranged inside the air duct 100 and is arranged adjacent to the wind wheel 400, and the guide vane assembly 200 is used for rectifying the airflow entering the air duct 100; in the air inlet direction from the air inlet 140 to the air outlet 150, the inner wall of the air duct 100 includes an air inlet section 110, a socket section 120 and an air outlet section 130 which are connected in sequence, and the wind wheel 400 and the guide vane assembly 200 are arranged on the socket section 120; the air intake section 110 is provided with a reduced area, the reduced area extends to form an air intake 140, and the reduced area is used for reducing the pressure of the air flow entering the wind wheel 400; the air outlet section 130 is provided with a flared region, the flared region extends to form an air outlet 150, and the flared region is used for diffusing the airflow flowing out of the guide vane assembly 200; the wind wheel 400 is disposed adjacent to the air inlet section 110, and the guide vane assembly 200 is disposed adjacent to the air outlet section 130.
In such a way, the necking area in the application can reduce the pressure of the air flow entering the wind wheel 400, and the flaring area is used for diffusing the air flow flowing out of the guide vane assembly 200, so that the air volume of the fan can still meet the use requirement under the condition of not increasing the rotating speed, and the problem of noise is effectively solved.
Further, with continued reference to fig. 1, the air intake section 110 includes: a first flat region L1 and a first inclined region L2, the first inclined region L2 being farther from the air intake opening 140 than the first flat region L1; the first straight area L1 is substantially parallel to the axial direction of the air duct 100, two ends of the first inclined area L2 are respectively connected with the first straight area L1 and the sleeving section 120, and the first inclined area L2 forms a first included angle α with the axial direction of the air duct 1001The air flow is rectified through the first straight area L1 and accelerated through the first inclined area L2 when the fan works, so that the air flow pressure at the air inlet 140 of the air duct is gradually reduced along the air inlet direction, and the air flow can enter the wind wheel 400 at a lower pressure. By designing the air inlet 140 as described above, the pressure of the air flow at the air inlet 140 can be reduced, so as to prevent the air flow in the air duct 100 from flowing back.
Specifically, the reduced area corresponds to the first inclined area L2, and the reduced area may be implemented in various ways, see fig. 4 to 6, and may be an arc chain formed by smoothly connecting a section of arc or a plurality of sections of arc, see fig. 7 and 8, or a broken line formed by a section of straight line or a plurality of sections of straight lines; wherein, FIG. 4 is a schematic view of the first inclined surface region L2 being a single circular arc R; FIGS. 5 and 6 are schematic views of the first inclined surface region L2 formed by two smoothly connected circular arcs with radii of R1 and R2, respectively, but the first inclined surface region L2 may be formed by a plurality of smoothly connected circular arcs with different radii; FIG. 3 is a schematic view of the first inclined area L2 formed by a straight line having a first included angle α with the axial direction of the wind tunnel 1001First angle of inclination alpha1The value range is as follows: alpha is not more than 30 degrees1Less than or equal to 60 degrees; fig. 7 and 8 show a broken line formed by three straight line segments of the first inclined surface region L2, which sequentially includes the air duct 100 along the air inlet direction from the air inlet 140 to the air outlet 150A first straight line section B1 with an included angle β 1, a second straight line section B2 with an included angle β 2 with the axial direction of the air duct 100, and a third straight line section B3 with an included angle β 3 with the axial direction of the air duct 100, although the first inclined surface section L2 may also be a broken line formed by a plurality of straight line sections. The present application is not limited thereto, and may be a combination of an arc line and a straight line, and is not further limited herein.
Further, the socket section 120 includes a second flat region L3 and a third flat region L4 that are substantially parallel to the axial direction of the air duct 100, and the second flat region L3 is connected to the first inclined region L2 and the third flat region L4, respectively; the second straight region L3 is far away from the air outlet section 130 than the third straight region L4, the caliber of the second straight region L3 is smaller than that of the first straight region L1, the second straight region L3 is provided with a wind wheel 400, and the guide vane assembly 200 is arranged in the third straight region L4.
Further, referring to fig. 3, the air outlet section 130 includes: a second inclined area L5 and a fourth straight area L6, the fourth straight area L6 is approximately parallel to the axial direction of the air duct 100, the second inclined area L5 is respectively connected with the third straight area L4 and the fourth straight area L6, and forms a second included angle alpha with the axial direction of the air duct 1002Arranged to form a flared region. The second inclined area L5 is farther from the air outlet 150 than the fourth straight area L6, and the aperture of the fourth straight area L6 is larger than the aperture of the third straight area L4. From this, the air current can carry out the diffusion at air-out section 130, turns into static pressure with kinetic energy, promotes fan crushing resistance to reduce exhaust loss.
Further, referring to fig. 3 in conjunction with fig. 9, the wind wheel 400 is fastened to the output shaft of the motor 300, and is completely embedded in the wind barrel 100, and can rotate around the output shaft of the motor 300 in the wind barrel 100. The wind wheel 400 includes a hub 410 connected to the output shaft of the motor 300, and blades 420 disposed on an outer wall of the hub 410 at equal intervals in a circumferential direction of the hub 410, wherein the hub 410 is mounted to the second flat region L3, and the blades 420 are located in the first inclined region L2 and the second flat region L3. The blade 420 has a blade root 421 connected to the hub 410, a blade tip 422 disposed away from the blade root, a blade leading edge 423 as an upwind side, and a blade trailing edge 424 as a downwind side, the blade leading edge 423 and the blade trailing edge 424 being located on both sides of the blade root 421 and the blade tip 422, respectively. In the second flat area L3, the gap between the vane top 422 and the inner wall of the wind duct 100 is gradually reduced along the wind inlet direction, and herein, the top gap backflow of the vane 420 can be effectively prevented, thereby improving the fan efficiency.
Specifically, referring to fig. 12, the blade 420 is configured such that the cross section M of the blade 420 in the circumferential direction of the hub 410 is a circular arc and the chord length B corresponding to the cross section M increases with the increase of the radius of the blade 420, i.e., the cross-sectional shape of the blade 420 in the circumferential direction of the hub 410 varies continuously according to the size of the radius of the blade 420. The plurality of blades 420 are disposed in a twisted posture on the outer wall of the hub 410, and adjacent blade leading edges and blade trailing edges of two adjacent blades 420 are overlapped.
Specifically, referring to fig. 9 to 12, the height of the blade 420 is defined as the distance from the top 422 to the root 421 of the blade 420, and if the diameter at a certain height G of the blade 420 is D, the number n of the blades 420 is1The chord length B at the blade height and the diameter D of the blade 420 meet the following relations: 0.35<（B*n1/D）<0.48, number n of blades 4201N is more than or equal to 51Less than or equal to 13. Based on this, after the blade 420 meets the above design, the chord length B gradually increases from the blade root 421 to the blade top 422, and the working capacity of the wind wheel 400 is enhanced at the same rotation speed; and the blade 420 has small torsion of the installation angle from the blade root 421 to the blade top 422, and the strength of the blade 420 is higher.
Referring to fig. 3 in conjunction with fig. 9, in consideration of the assembly error, after the wind wheel 400, the guide vane assembly 200 and the motor 300 are all mounted to the wind tunnel 100, the axial distance between the interface f-f between the first flat region L1 and the first inclined region L2 and the leading edge point Q of the blade 420 is less than 0.05 × K; the interface f-f is perpendicular to the axis of the wind barrel 100, the leading edge point Q of the vane 420 is the intersection of the vane top 422 and the vane leading edge 423, and K is the length of the first inclined surface area L2 in the axial direction of the wind barrel 100. The wind turbine 400 is preferably assembled such that the leading edge point Q of the blade 420 is located at the interface f-f, i.e., the axial distance between the interface f-f and the leading edge point Q of the blade 420 is zero.
Further, referring to fig. 3 in combination with fig. 11, the outer diameter of the hub 410 is gradually increased in the air intake direction, wherein the small end surface of the hub 410 near the air intake 140 is straightThe diameter d1 is smaller than the diameter d2 of the large end face of the hub 410 away from the intake vent 150. Specifically, the projection of the outer circumferential surface of the hub 410 in the axial direction is a section of arc line or a smooth arc line chain composed of a plurality of sections of arc lines, that is, the outer circumferential surface of the hub 410 is formed by splicing one or more arc surfaces in the axial direction; when the projection of the outer peripheral surface of the hub 410 in the axial direction is a smooth arc chain consisting of a plurality of arc segments, the number n of arc segments2Not less than 2, and the radius of each arc is different. Thus, when the airflow enters the air duct 100 through the blades 420, the airflow can move to the guide vane assembly 200 along the outer wall of the hub 410, thereby preventing the occurrence of backflow of the intake air and separation of the airflow at the blade root 421.
Further, with continued reference to fig. 3 in conjunction with fig. 11, the hub 410 of the wind wheel 400 may be coupled to the output shaft of the motor 300 via a knurled nut 500. Specifically, the knurled nut 500 is in interference connection with the output shaft of the motor 300, the hub 410 is provided with a mounting hole 411 matched with the knurled nut 500, and the knurled nut 500 is press-fitted in the mounting hole 411. In order to facilitate the press-fitting of the knurled nut 500 in the mounting hole 411, a groove 412 is formed in the front end small end face of the hub 410, the groove 412 is communicated with the mounting hole 411, the groove depth of the groove 412 is c, and the value range of the groove depth c is as follows: (d 1/3) c (d 1/2). The outer circumference of the knurled nut 500 is provided with knurls, so that the bonding strength with the hub 410 is increased, the vibration between the wind wheel 400 and the output shaft of the motor 300 during rotation is reduced, and the noise is reduced.
Further, referring to fig. 2 in combination with fig. 3, the guide vane assembly 200 includes a motor fixing base 210 supporting a motor 300 and a guide vane 220 disposed on an outer wall of the motor fixing base 210. The guide vane 220 is respectively connected with the motor fixing seat 210 and the inner wall of the air duct 100 in the third straight region L4, so as to fix the motor 300 to the air duct 100; the number of vanes 220 is n3N is not less than 53Less than or equal to 13, the guide vane 220 fixes the motor 300 in the wind cylinder 100 on one hand, and plays a role in guiding the airflow in the wind wheel 400 on the other hand, thereby homogenizing the airflow. The motor fixing base 210 has a receiving groove 211 for mounting the motor 300 and a through hole 212 formed on a groove wall of the receiving groove 211 for the output shaft of the motor 300 to penetrate to the wind wheel 400 side, and the output shaft of the motor 300 penetrates throughAfter passing through the through hole 212, the motor 300 is connected to the wind wheel 400, so that the motor 300 rotates to drive the wind wheel 400 to rotate. Wherein, dryer 100, motor fixing base 210 and wheel hub 410 coaxial setting.
Further, in order to reduce the dynamic and static interference effect between the wind wheel 400 and the guide vane 220, the profile of the guide vane 220 is designed, please refer to fig. 13, and fig. 13 is a schematic view of the profile of the guide vane 220. The blade profile of the guide vane 220 includes a pressure profile 221, a trailing edge profile 224 as a downwind side, a suction profile 222, and a leading edge profile 223 as an upwind side, which are sequentially connected end to end. Wherein, the leading edge molded line 223 is a single arc line, and is smoothly connected with the starting point of the pressure surface molded line 221 and the starting point of the suction surface molded line 222; the trailing edge profile 224 is connected with the tail end of the pressure surface profile 221 and the tail end of the suction surface profile 222; the suction surface profile 222 is designed in a single arc; the pressure surface molded line 221 is designed by two sections of circular arcs, the sections 1/4-1/3 from the front edge of the guide vane 220 to the chord length I direction of the vane are molded line circular arcs H1, and the molded line circular arcs H1 are smoothly linked with the molded line circular arcs H2 at the rear section. With continuing reference to fig. 14, fig. 14 is a schematic blade profile of a conventional vane profile, and compared with the conventional vane profile, the pressure surface profile 221 in the present application adopts a two-segment arc design, and a concave portion can be formed at the pressure surface leading edge close to the leading edge profile 223, so as to effectively reduce the dynamic and static interference effect between the wind wheel 400 and the vane 220.
Specifically, after the wind wheel 400, the guide vane assembly 200 and the motor 300 are all mounted to the wind duct 100, considering the existence of assembly errors, the distance between the blade trailing edge 424 of the wind wheel 400 and the guide vane leading edge in the axial direction of the wind duct 100 is defined as a distance a, the length of the wind wheel 400 in the axial direction of the wind duct 100 is defined as a distance b, the distance a and the distance b satisfy the relationship, a is greater than or equal to 0.15b and less than or equal to 0.45b, wherein the guide vane leading edge refers to the position of the leading edge molded line 223.
Further, in consideration of stability during operation of the fan, the outer wall of the air duct 100 is provided with a reinforcing rib 160, referring to fig. 1, the reinforcing rib 160 includes a transverse rib 162 parallel to the airflow direction of the air duct 100 and an annular rib 161 perpendicular to the airflow direction of the air duct 100. Therefore, the connection stability and reliability of the air duct 100 and the outer drum 600 can be improved, and the stability of the fan in the operation process can be improved.
It is understood that the fan in the present application can be applied to different usage scenarios, which are illustrated below by way of example.
The blower in the present application can be applied to a hair dryer, please refer to fig. 15, and the hair dryer includes an outer barrel 600, the blower inside the outer barrel 600, and a handle 900 outside the outer barrel 600. The outer barrel 600 is hollow inside and provided with openings at two ends, wherein the fan is positioned in the hollow cavity of the outer barrel 600, openings at two ends of the outer barrel 600 are respectively provided with an air inlet cover 700 and an air outlet cover 800, and the air inlet cover 700 is close to the fan. The handle 900 is connected to the tub 600 and located below the tub 600 to support the tub 600.
It can be understood that the above specific application is only an illustration of the fan in the present application, and those skilled in the art may make an adaptive adjustment according to actual situations, which is not described herein again.
In summary, in the present application, the air intake section 110 is divided into the first straight area L1 and the first inclined area L2, when airflow enters the fan from the outside, the airflow is rectified by the first straight area L1, and is accelerated and depressurized in the first inclined area L2, so that the pressure of the airflow along the air intake direction is gradually reduced, and the airflow enters the wind wheel 400 at a lower pressure, thereby effectively preventing the pressure P2 at the inlet of the wind wheel 400 from being greater than the pressure P1 at the air inlet 140 due to the forced work and pressurization after the airflow enters the wind wheel 400, and avoiding the airflow from forming backflow to cause air volume and efficiency loss; air-out section 130 is divided into second inclined plane district L5 and fourth straight district L6 in this application, and from this, the air current can carry out the diffusion at air-out section 130, turns into the static pressure with kinetic energy, promotes fan crushing resistance to reduce exhaust loss.
While the embodiments of the present application have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in a variety of fields suitable for this application, and further modifications will be readily apparent to those skilled in the art, and it is therefore not intended to be limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A fan, comprising:
the air duct is hollow along the axial direction of the air duct so as to form a hollow cavity penetrating through the air duct, and the air duct is provided with an air inlet and an air outlet;
the wind wheel is arranged in the wind barrel and used for blowing the wind barrel to form high-speed airflow; and
the guide vane assembly is arranged inside the air duct and is arranged adjacent to the wind wheel, and the guide vane assembly is used for rectifying the airflow entering the air duct;
the inner wall of the air duct comprises an air inlet section, a sleeving section and an air outlet section which are sequentially connected in the air inlet direction from the air inlet to the air outlet, and the wind wheel and the guide vane assembly are arranged on the sleeving section;
the air inlet section is provided with a reducing area, the reducing area extends to form the air inlet, and the reducing area is used for reducing the pressure of air flow entering the wind wheel; the air outlet section is provided with a flaring area, the flaring area extends to form the air outlet, and the flaring area is used for diffusing the air flow flowing out of the guide vane assembly.
2. The fan of claim 1, wherein the air intake section comprises:
the first straight area is approximately parallel to the axial direction of the air duct; and
the first inclined surface area is respectively connected with the first straight area and the sleeving connection section and is arranged at a first included angle with the axial direction of the air duct so as to form the necking area;
wherein the first inclined area is far away from the air inlet compared with the first straight area.
3. The fan as set forth in claim 2,
the sleeved section comprises a second straight area and a third straight area which are approximately parallel to the axial direction of the air duct, and the second straight area is respectively connected with the first inclined area and the third straight area;
the second straight area is far away from the air outlet section than the third straight area, the caliber of the second straight area is smaller than that of the first straight area, the wind wheel is installed in the second straight area, and the guide vane assembly is installed in the third straight area.
4. The fan of claim 3, wherein the air outlet section comprises:
the fourth straight area is approximately parallel to the axial direction of the air duct; and
the second inclined surface area is respectively connected with the third straight area and the fourth straight area and is arranged at a second included angle with the axial direction of the air duct so as to form the flaring area;
the second inclined surface area is far away from the air outlet compared with the fourth straight area, and the caliber of the fourth straight area is larger than that of the third straight area.
5. The fan as set forth in claim 1,
the necking area is an arc line or an arc line chain formed by smoothly connecting a plurality of arc lines; or is
The necking area is a straight line or a broken line formed by a plurality of straight lines.
6. The fan as set forth in claim 1,
the wind wheel is close to the air inlet section is arranged, the wind wheel comprises a wheel hub connected with an output shaft of the motor and blades arranged on the outer wall of the wheel hub at equal intervals along the circumferential direction of the wheel hub, and the number of the blades is n1；
The blade is configured in a manner that the section of the blade in the circumferential direction of the hub is in a circular arc shape, and the chord length B corresponding to the section increases along with the increase of the diameter D of the blade;
the number n of blades1The chord length B and the blade diameter D satisfy the following relations: 0.35<（B*n1/D）<0.48。
7. The fan as claimed in claim 6,
the blade have with the root of blade that wheel hub is connected with keep away from the top of the blade that the root of the blade set up, wherein, the top of the blade with the clearance between the inner wall of dryer reduces along the air inlet direction gradually.
8. The fan as claimed in claim 6,
the hub is connected with an output shaft of the motor through a knurled nut;
wherein, wheel hub's external diameter is the situation of grow gradually on the air inlet direction, wheel hub's the projection of outer peripheral face on the axial direction is a smooth arc line chain that an pitch arc or multistage pitch arc are constituteed.
9. The fan as claimed in claim 6,
the guide vane assembly is arranged close to the air outlet section and comprises a motor fixing seat supporting the motor and a guide vane arranged on the outer wall of the motor fixing seat, and the guide vane is connected with the inner wall of the air duct so as to fix the motor to the air duct;
the air duct, the motor fixing seat and the hub are coaxially arranged.
10. A hair dryer, characterized in that it comprises a blower as claimed in any one of claims 1 to 9.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020808488.1U CN212479700U (en) | 2020-05-15 | 2020-05-15 | Fan and hairdryer |
| JP2022563195A JP7359971B2 (en) | 2020-05-15 | 2021-05-13 | Blower and hair dryer |
| US17/910,817 US20230145011A1 (en) | 2020-05-15 | 2021-05-13 | Fan and electric hair dryer with improved air outlet performance |
| PCT/CN2021/093479 WO2021228169A1 (en) | 2020-05-15 | 2021-05-13 | Fan and electric hair drier |
| KR1020227032348A KR20220140837A (en) | 2020-05-15 | 2021-05-13 | fan and electric hair dryer |
| EP21805071.4A EP4119805A4 (en) | 2020-05-15 | 2021-05-13 | Fan and electric hair drier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020808488.1U CN212479700U (en) | 2020-05-15 | 2020-05-15 | Fan and hairdryer |
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| CN212479700U true CN212479700U (en) | 2021-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379746A (en) * | 2020-05-15 | 2020-07-07 | 追觅科技(上海)有限公司 | Fan and hairdryer |
| WO2021228169A1 (en) * | 2020-05-15 | 2021-11-18 | 追觅科技(上海)有限公司 | Fan and electric hair drier |
-
2020
- 2020-05-15 CN CN202020808488.1U patent/CN212479700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379746A (en) * | 2020-05-15 | 2020-07-07 | 追觅科技(上海)有限公司 | Fan and hairdryer |
| WO2021228169A1 (en) * | 2020-05-15 | 2021-11-18 | 追觅科技(上海)有限公司 | Fan and electric hair drier |
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