CN211368547U

CN211368547U - Hair drier

Info

Publication number: CN211368547U
Application number: CN201922076299.XU
Authority: CN
Inventors: 李夏子; 王涛
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-08-28
Anticipated expiration: 2029-11-27

Abstract

The utility model provides a hair drier, it includes: the fan comprises a shell, a duct arranged in the shell, a motor arranged in the duct, and a first fan and a second fan which are driven by the motor and rotate along the same direction, wherein the shell is provided with an air inlet side and an air blowing side, the first fan is close to the air inlet side, the second fan is close to the air blowing side, and a speed increasing mechanism is arranged between the second fan and a driving shaft of the motor, so that the rotating speed of the second fan is greater than that of the first fan. The utility model discloses a hair-dryer is through dispose acceleration mechanism on the fan of the side of blowing for the fan speed of the side of blowing is higher than the fan speed of air inlet side, thereby forms multistage pressurization, makes wind pressure and amount of wind strengthen gradually, improves the efficiency of blowing of hair-dryer, noise abatement.

Description

Hair drier

Technical Field

The utility model relates to a garden instrument field especially relates to a hair-dryer.

Background

The blower is one kind of conventional garden tool and is used mainly to blow down fallen leaves, road dust, accumulated water, snow and other sundries. In the use process of the hair drier, users have different requirements on wind power and air quantity under different use environments. In the prior art, various wind power or air volume adjusting modes exist, one common mode is to increase wind power by arranging multiple stages of fans for superposition, and the other mode is to increase air volume by increasing the area of an air inlet. When the air volume and the air pressure are increased by adopting a multi-stage fan superposition mode, because the blade configuration and the number of each fan are the same, and the rotating speed of each fan is the same, the air flow generated by the fan is blocked to a certain extent, and then the air loss and the power loss are generated, so that the hair drier cannot achieve the optimal blowing effect, and the working noise is relatively high.

Therefore, it is necessary to design a blower to solve the above problems.

Disclosure of Invention

An object of the utility model is to provide an improve wind pressure and wind speed, guarantee the pressure boost effect, and then improve the hair-dryer of efficiency of blowing.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a hair dryer, comprising: the fan comprises a shell, a duct arranged in the shell, a motor arranged in the duct, and a first fan and a second fan which are driven by the motor and rotate along the same direction, wherein the shell is provided with an air inlet side and an air blowing side, the first fan is close to the air inlet side, the second fan is close to the air blowing side, and a speed increasing mechanism is arranged between the second fan and a driving shaft of the motor, so that the rotating speed of the second fan is greater than that of the first fan.

As a further improved technical solution of the present invention, the first fan and the second fan are separately disposed at both ends of the driving shaft of the motor.

As the utility model discloses further modified technical scheme, first fan with form the first district between the air inlet side, first fan with form the second district between the second fan, the second fan with form the third district between the side of blowing, the hair-dryer during operation, the wind pressure of first district, second district and third district increases step by step.

As the utility model discloses further modified technical scheme, speed increasing mechanism is planetary gear speed increaser, and it is including fixing drive epaxial outer ring gear, locate outer ring gear inboard and with a plurality of planet wheels of outer ring gear meshing, support the planet carrier of planet wheel and with the sun gear of planet wheel meshing, but a plurality of planet wheels are installed on the planet carrier with the rotation, the planet carrier is fixed in the duct, the sun gear pass through the fixed axle with second fan fixed mounting.

As a further improved technical proposal of the utility model, the transmission ratio of the planetary gear speed increaser is 2-6, and the speed difference between the first fan and the second fan is 2000 rpm-5000 rpm.

As the technical scheme of the further improvement of the utility model, the hair-dryer still includes the third fan, the third fan with the second fan is neighbouring to be set up and synchronous rotation, the second fan with interval between the third fan is 5mm-20 mm.

As a further improved technical solution of the present invention, the hair dryer further includes a fourth fan, the fourth fan is disposed adjacent to the first fan and rotates synchronously, and the distance between the first fan and the fourth fan is 5mm-20 mm.

As the utility model discloses further modified technical scheme, first fan is close to the air inlet side is equipped with the water conservancy diversion awl, the second fan is close to the side of blowing is equipped with the water conservancy diversion awl, first fan with the external diameter, the blade quantity and the blade angle of second fan are the same.

As the utility model discloses further modified technical scheme, the planet support includes first support, second support and connects a plurality of axles of first support and second support, the planet wheel wears to locate epaxial, first support is fixed in the duct, first support with be equipped with antifriction bearing between the fixed axle, antifriction bearing with speed increasing mechanism sets up side by side and is more close to the air inlet side.

As the utility model discloses further modified technical scheme, evenly be equipped with the first air guide muscle that a plurality of was buckled in the duct, be equipped with a plurality of second air guide muscle in the first support, first air guide muscle with the setting is alignd to the second air guide muscle.

According to the above technical scheme, the utility model discloses a hair-dryer is through dispose acceleration mechanism on the fan of the side of blowing for the fan speed of air inlet side is less than the fan speed of the side of blowing, thereby forms multistage pressurization, makes wind pressure and amount of wind strengthen gradually, improves the efficiency of blowing of hair-dryer, noise abatement.

Drawings

Fig. 1 is a perspective view of the hair dryer of the present invention.

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

Figure 3 is a partial cross-sectional view of the blower of figure 2.

Fig. 4 is a perspective view of the cylinder in fig. 3.

Fig. 5 is a perspective view of the cylindrical portion of fig. 3 in another direction.

Figure 6 is a partially exploded view of the hair dryer of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the present invention provides a hair dryer 100, which includes: the fan comprises a machine shell 1, a duct 2 arranged in the machine shell 1, a motor 3 arranged in the duct 2, and a first fan 4 and a second fan 5 driven by the motor 3.

The machine shell 1 is provided with an air inlet side 11 and an air blowing side 12, and air flow enters the machine shell 1 from the air inlet side 11 and flows out through the air blowing side 12 after being pressurized; specifically, the grille 111 is arranged at the air inlet side 11, and the airflow enters the casing 1 through the grille 111, so that sundries can be prevented from entering the casing 1, the sundries are prevented from contacting the fan, the fan can run stably, the safety of the blower 100 in running is ensured, and the reliability of the blower 100 is improved.

The duct 2 is axially arranged in the casing 1, in particular between the air inlet side 11 and the air blowing side 12, for guiding and restricting the flow of the air flow such that the air flow moves towards the air blowing side 12. Referring to fig. 3, the duct 2 includes a cylindrical portion 21 near the blowing side 12 and a flared portion 22 near the intake side 11. Referring to fig. 4 and 5, the cylindrical portion 21 includes an outer cylinder 211 connected to the housing 1 and an inner cylinder 212 surrounding the motor 3, and an end of the trumpet portion 22 near the air inlet side 11 is opened widely to facilitate the air flow into the duct 2. The front end of the inner cylinder 212 forms a circular ring part 213, and the inner side of the circular ring part 213 is fixedly installed with the front end of the motor 3.

Referring to fig. 4 and 5, a plurality of bent first air guiding ribs 214 are uniformly distributed inside the duct 2, and the first air guiding ribs 214 can be used for guiding the flow of air, so as to ensure smooth flow of air and reduce wind noise. Specifically, the plurality of first air guiding ribs 214 are uniformly arranged between the inner cylinder 212 and the outer cylinder 211 and connected with the inner cylinder 212 and the outer cylinder 211, and the first air guiding ribs 214 extend along the axial direction as a whole. During operation, in the air current got into duct 2 from air inlet side 11 under the effect of first fan 4 and second fan 5, the guide effect of first air guide rib 214 has reduced the noise that produces because of the striking between air current and the duct 2, improves the comfort level that the user used, and first air guide rib 214 can also avoid the air current to take place the turbulent flow simultaneously, guarantees that the air current flows steadily, and then guarantees that the air-out is steady, the reduction power loss.

Referring to fig. 2 and 3, the motor 3 has a drive shaft 31, the drive shaft 31 being arranged in the axial direction of the duct 2. The first fan 4 and the second fan 5 are rotated in the same direction by the driving shaft 31, the first fan 4 is disposed near the air intake side 11, and the second fan 5 is disposed near the air blowing side 12. The first fan 4 and the second fan 5 are separately provided at both ends of the driving shaft 31 of the motor 3 such that the motor 3 is entirely located between the first fan 4 and the second fan 5, i.e., within the second region 24. A speed increasing mechanism 6 is provided between the second fan 5 and the drive shaft 31 of the motor 3 to create a speed difference between the first fan 4 and the second fan 5.

The area formed between the first fan 4 and the air inlet side 11 is defined as a first area 23, the area formed between the first fan 4 and the second fan 5 is defined as a second area 24, a third area 25 is formed between the second fan 5 and the air blowing side 12, and when the air blower 100 works, the air pressure of the first area 23, the second area 24 and the third area 25 is gradually increased.

The utility model discloses in, second fan 5 is through acceleration mechanism 6 and drive shaft 31 coupling. Preferably, the speed increasing mechanism 6 is a planetary speed increasing gear, which includes a sun gear 61, a plurality of planet gears 62, a planet carrier 63 and an outer ring gear 64.

As shown in fig. 3 and 6, the outer ring gear 64 is fixed on the driving shaft 31, and preferably, a bushing 641 is disposed between the outer ring gear 64 and the driving shaft 31 to tightly fix the outer ring gear 64 and the driving shaft 31. The planet carrier 63 is fixed in the duct 2 and functions to support a plurality of planet wheels 62, and specifically, the planet carrier 63 includes a plurality of shafts 631, a first carrier 632, and a second carrier 633. The first bracket 632 is fixedly mounted to the duct 2, specifically, fixed to the circular portion 213. The planet wheels 62 are rotatably mounted on the planet carrier 63, specifically, the planet wheels 62 are respectively fixed on the planet carrier 63 through shafts 631, one end of each shaft 631 is fixed with the first carrier 632, the other end of each shaft 631 is fixed with the second carrier 633, and the first carrier 632 is matched with the second carrier 633 to support a plurality of planet wheels 62 to be capable of rotating around the shafts 631 under the driving of the outer gear ring 64.

The planet wheels 62 are located inside the outer ring gear 64 and mesh with the outer ring gear 64. The sun wheel 61 is positioned among the plurality of planet wheels 62 and meshed with the planet wheels 62, the sun wheel 61 is fixedly arranged with the second fan 5 through the fixed shaft 7, specifically, one end of the fixed shaft 7 penetrates through the center of the sun wheel 61 to be fixed with the fixed shaft, and the other end of the fixed shaft is fixedly arranged with the second fan 5.

First support 632 specifically is cylindricly, and its inside is equipped with a plurality of second wind guiding ribs 6321, and when first support 632 was installed in the duct, second wind guiding rib 6321 aligns the setting with first wind guiding rib 214, so sets up for the gas flow is smooth and easy.

As shown in fig. 6, the number of the planetary gears 62 is 5. In this embodiment, the number of teeth of the sun gear 61 is set to 12-17, and the number of teeth of the outer ring gear 64 is set to 40-75, so that the gear ratio of the planetary gear speed increaser is 2-6. When the rotation speed of the motor 3 is set such that the rotation speed of the second fan 5 is 15000-25000 rpm, the speed difference between the first fan 4 and the second fan 5 is 2000-5000 rpm. In other embodiments, the number of teeth of the sun gear 61 and the number of teeth of the outer ring gear 64 may be adjusted according to actual requirements to achieve the required speed difference. When the fan works, power is input from the outer gear ring 64, the outer gear ring 64 drives the planet gear 62 to rotate, the sun gear 61 and the second fan 5 are further driven to rotate, and finally the rotating speed of the second fan 5 is increased.

The utility model discloses in, second fan 5 increases at the effect speed-increasing mechanism 6 under, and is higher with the 7 rotational speeds of second fan 5 synchronous pivoted fixed axle, and first support 632 is fixed not changeing, consequently forms relative rotation between fixed axle 7 and the first support 632, and first support 632 is inboard to be close to fixed axle 7, produces the friction easily. In order to solve the above problem, the utility model discloses set up antifriction bearing 32 between first support 632 and fixed axle 7, antifriction bearing 32 sets up and is closer to air inlet side 11 with speed increasing mechanism 6 side by side. The outer diameter and the inner diameter of the rolling bearing 32 are selected according to the actual distance between the inner side of the first bracket 632 and the outer side of the fixed shaft 7, so that the friction between the first bracket 632 and the fixed shaft 7 is reduced, and the rotation of the second fan 5 is smoother.

Referring to fig. 3, a diversion cone 41 is disposed on a side of the first fan 4 close to the air inlet side 11, and a diversion cone 51 is disposed on a side of the second fan 5 close to the air blowing side 12, so as to facilitate air flowing, reduce the flow path of the air flow, and improve the air outlet efficiency of the hair dryer 100.

The utility model discloses in, first fan 4 is the same with second fan 5's external diameter, blade quantity and blade angle, consequently, improves second fan 5's rotational speed on this basis, forms the speed difference between first fan 4 and the second fan 5. In other embodiments, each fan may also have different outer diameters, numbers of blades, and blade angles, and when the rotation speed is adjusted by the speed increasing mechanism 6, the adjustment may be performed adaptively according to the specific specification of each fan, and only the wind pressure to form the first region 23, the second region 24, and the third region 25 needs to be increased step by step.

Referring to fig. 2, when the hair dryer 100 of the present invention works, the motor 3 drives the first fan 4 and the second fan 5 to rotate in the same direction, so that the external air enters the duct 2 through the air inlet side 11, and the first air pressure is formed in the first area 23 and the second air pressure is formed in the second area 24 by the accelerated pressurization of the first fan 4 and the second fan 5 in sequence, wherein the second air pressure is greater than the first air pressure because the rotation speed of the first fan 4 is less than that of the second fan 5; further, after the airflow is accelerated by the second fan 5, a third wind pressure is formed in the third area 25, and the third wind pressure is greater than the second wind pressure due to the action of the superposition of the wind power of the first fan 4 and the wind power of the second fan 5; in this way, the air flow is pressurized step by step in the duct 2 and finally output at the blowing side 12, thereby forming a large blowing force. The blowing power of the blower 100 of the utility model is improved by 20% -50% compared with the blowing power of a single-blade blower, thereby improving the working performance of the blower 100.

In addition, in other embodiments, different numbers of fans can be stacked in front of and behind the first fan 4 and the second fan 5, for example, the second embodiment of the hair dryer of the present invention has a structure similar to that of the hair dryer 100 in the above embodiment, except that the hair dryer of this embodiment further includes a third fan, and the third fan is disposed adjacent to the second fan and rotates synchronously. Specifically, the third fan is fixedly mounted with the second fan through a fastener (not numbered), and the driving shaft drives the second fan and the third fan to synchronously rotate through the speed increasing mechanism. The distance between the second fan and the third fan is 5mm-20mm, namely, the distance between the outer edge of the blade of the second fan and the outer edge of the blade of the third fan is 5mm-20 mm. The third fan is closer to the blowing side than the second fan.

The third embodiment of the hair dryer of the present invention is similar in structure to the hair dryer 100 of the above embodiments, except that the hair dryer of the present embodiment further includes a fourth fan disposed adjacent to the first fan and rotating synchronously. Specifically, the fourth fan is fixedly installed on the driving shaft, and the driving shaft drives the first fan and the fourth fan to synchronously rotate. The distance between the first fan and the fourth fan is 5mm-20mm, namely, the distance between the outer edge of the blade of the first fan and the outer edge of the blade of the fourth fan is 5mm-20 mm. The fourth fan is closer to the air inlet side than the first fan.

To sum up, the utility model discloses a hair-dryer adopts two at least fans, disposes acceleration mechanism on the fan of the side of blowing for the fan speed of air inlet side is less than the fan speed of the side of blowing, and then forms multistage pressurization, makes wind pressure and amount of wind strengthen gradually, and then improves the efficiency of blowing of hair-dryer, noise abatement.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the technical personnel in the technical field should understand that the technical personnel in the technical field can still modify the present invention or substitute the same, and all the technical solutions and the improvements thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A hair dryer, comprising: the fan comprises a shell, a duct arranged in the shell, a motor arranged in the duct, and a first fan and a second fan which are driven by the motor and rotate along the same direction, wherein the shell is provided with an air inlet side and an air blowing side.

2. The hair dryer of claim 1, wherein said first fan and said second fan are disposed at opposite ends of a drive shaft of said motor.

3. The hair dryer of claim 1, wherein a first area is formed between the first fan and the air inlet side, a second area is formed between the first fan and the second fan, and a third area is formed between the second fan and the air blowing side, and when the hair dryer is operated, the air pressure of the first area, the second area and the third area is gradually increased.

4. The hair dryer of claim 1, wherein the speed increasing mechanism is a planetary gear speed increasing mechanism including an outer ring gear fixed to the drive shaft, a plurality of planetary gears provided inside the outer ring gear and engaged with the outer ring gear, a planetary carrier supporting the planetary gears, and a sun gear engaged with the planetary gears, the plurality of planetary gears being rotatably mounted on the planetary carrier, the planetary carrier being fixed in the duct, the sun gear being fixedly mounted with the second fan by a fixed shaft.

5. The hair dryer of claim 4, wherein said planetary gear speed increaser has a gear ratio of 2-6, and wherein said first fan and said second fan have a speed differential of 2000 rpm-5000 rpm.

6. The hair dryer of claim 1, further comprising a third fan disposed adjacent to and rotating synchronously with said second fan, said second fan being spaced from said third fan by a distance of 5mm to 20 mm.

7. The hair dryer of claim 1, further comprising a fourth fan disposed adjacent to said first fan and rotating synchronously, wherein a distance between said first fan and said fourth fan is 5mm to 20 mm.

8. The hair dryer of claim 1, wherein a guide cone is provided on the first fan near the air inlet side, a guide cone is provided on the second fan near the air blowing side, and the first fan and the second fan have the same outer diameter, the same number of blades, and the same blade angle.

9. The hair dryer of claim 4, wherein the planetary support comprises a first support, a second support and a plurality of shafts connecting the first support and the second support, the planetary wheel penetrates through the shafts, the first support is fixed in the duct, a rolling bearing is arranged between the first support and the fixed shaft, and the rolling bearing and the speed increasing mechanism are arranged in parallel and are closer to the air inlet side.

10. The hair dryer of claim 9, wherein a plurality of bent first air guiding ribs are uniformly arranged in the duct, a plurality of second air guiding ribs are arranged in the first support, and the first air guiding ribs and the second air guiding ribs are aligned.