CN219719992U

CN219719992U - Noise-reducing blower

Info

Publication number: CN219719992U
Application number: CN202321252439.4U
Authority: CN
Inventors: 喻金明; 董栋军
Original assignee: Leshow Electronic Technology Co Ltd
Current assignee: Leshow Electronic Technology Co Ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-09-22
Anticipated expiration: 2033-05-19

Abstract

The utility model provides a noise-reducing blower, and belongs to the technical field of blowers. The blower comprises a handle assembly and a machine head connected with the handle assembly, wherein a heating assembly and a fan unit are arranged in the machine head, an air inlet is formed in the rear end of the machine head, an air outlet is formed in the front end of the machine head, a noise reduction cavity is further formed in the machine head and located between the fan unit and the heating assembly, external air flow enters the machine head from the air inlet under the action of the fan unit and sequentially passes through the fan unit, the noise reduction cavity and the heating assembly and then is blown out from the air outlet, and the noise reduction cavity firstly diffuses outwards from the fan unit along the flowing direction of the air flow and then converges towards the heating assembly. Through the setting of the cavity of making an uproar falls, avoid the air current to blow to heating element directly, reduce the air current turbulent flow, noise abatement.

Description

Noise-reducing blower

Technical Field

The utility model relates to the field of blowers, in particular to a noise-reducing blower.

Background

The hair dryer is a personal care type small household appliance for quick hair drying, and comprises a fan unit and a heating assembly, wherein external air flow enters the machine under the action of the fan unit, and hot air is discharged after the air is heated by the heating assembly, so that the hair is quickly dried. However, the noise of the blower when it is in operation has always affected the user's experience. The noise of the blower during operation is mainly generated by the motor and the air flow. At present, the wind cavity of the existing blower is a direct blowing wind channel, namely, the air flow is directly blown to the heating component after passing through the fan unit, and the air flow impinges on the heating component to generate noise. Therefore, the air duct structure needs to be optimized to reduce the noise generated by the air flow, thereby playing a role in reducing the noise of the whole machine.

Disclosure of Invention

The utility model provides a noise-reducing blower, which prevents air flow from directly blowing to a heating component through the arrangement of a noise-reducing cavity, reduces air flow turbulence and reduces noise.

The technical scheme of the utility model is as follows:

the utility model provides a hair-dryer of making an uproar falls, includes handle subassembly, with the aircraft nose that handle subassembly is connected, be equipped with heating element, fan unit in the aircraft nose, the rear end of aircraft nose is equipped with the air intake, the front end is equipped with the air outlet, wherein, still be equipped with in the aircraft nose and fall the chamber of making an uproar, fall the chamber and be located between fan unit and the heating element outside air current is followed under the effect of fan unit air intake gets into the aircraft nose inside and passes through fan unit in proper order, fall the chamber of making an uproar, heating element after follow the air outlet blows out, fall the chamber of making an uproar follow earlier fan unit out diffusion back to heating element convergence along the direction that the air current flows.

Preferably, at least part of the side wall of the noise reduction cavity is an arc-shaped surface.

Preferably, the side walls of the noise reduction cavity are spherical surfaces.

Preferably, the radius of the sphere where the spherical surface is positioned is r, and r is more than or equal to 1.5cm and less than or equal to 2.5cm.

Preferably, the central axis of the handpiece passes through the sphere center of the sphere corresponding to the spherical surface.

Preferably, a first installation cavity for assembling the heating assembly is further formed in the machine head, a pressure equalizing cavity is formed between the rear end of the heating assembly and the rear end of the first installation cavity at intervals, and the pressure equalizing cavity is in smooth transition connection with the noise reducing cavity.

Preferably, the central axes of the heating component, the first mounting cavity and the fan unit are the same as those of the noise reduction cavity.

Preferably, the diffusion angle of the noise reduction cavity is alpha, and alpha is more than or equal to 20 degrees and less than or equal to 30 degrees.

Preferably, the noise reduction cavity is arranged above the joint of the handle assembly and the machine head.

Preferably, the machine head further comprises a first inner wall and a second inner wall 11 which are buckled left and right, a second installation cavity used for assembling the fan unit is further formed in the first inner wall, a damping sleeve is sleeved on the fan unit, a first cavity and a second cavity used for forming the noise reduction cavity are respectively formed in the first inner wall and the second inner wall 11, one end, far away from the air inlet, of the second installation cavity is in transitional connection with the second cavity, and the central axis of the second installation cavity is the same as that of the noise reduction cavity.

The beneficial effects of the utility model are as follows:

1. through the setting of the cavity of making an uproar to and make the cavity of making an uproar to make an uproar outwards diffuse from the fan unit then to heating element convergence, can avoid the air current through the fan unit directly blowing to heating element, reduced the air current turbulent flow, and then reduce the air current noise, and then play the purpose of making an uproar falls in the complete machine.

2. Through making the at least partial lateral wall in chamber of making an uproar be the arcwall face, smooth arcwall face can reduce the windage, plays the guide effect to the air current, further reduces the air current turbulence, reduces the air current noise, reduces the amount of wind loss simultaneously.

3. Through making the lateral wall that falls the chamber of making an uproar be spherical, further reduce the air current turbulence, reduce the air current noise, reduce the amount of wind loss simultaneously. Spherical surface means that the side wall of the noise reduction cavity is part of a sphere.

4. By making r less than or equal to 1.5cm and less than or equal to 2.5cm, the noise reduction can be carried out by matching with the whole structure of the product, and the diameter of the machine head is increased without occupying too much space in the machine; when r is less than 1.5cm, the noise reduction effect is difficult to realize; when r is more than 2.5cm, a larger space is occupied, so that the volume of the machine head is increased.

5. By enabling the central axis of the machine head to pass through the sphere center of the sphere corresponding to the sphere, airflow turbulence is reduced, and noise is further reduced.

6. Through the arrangement of the pressure equalizing cavity, the air pressure of the air flow blown to the heating component is balanced, the turbulence of the air is reduced, and then the noise is reduced; meanwhile, the voltage equalizing cavity is in smooth transitional connection with the noise reducing cavity, so that wind resistance is reduced, turbulence of wind is further reduced, noise is reduced, and air quantity loss is reduced.

7. Through making heating element, first installation cavity, fan unit with the central axis in the chamber of making an uproar falls is the same, reduces the turbulent flow of wind, and then reduces the air current noise.

8. The high-frequency noise generated by cutting the air flow by the fan blade when the fan unit works can be diffused to the cavity by making alpha more than or equal to 20 degrees and less than or equal to 30 degrees, and the turbulence of wind can be reduced, so that the noise is reduced; when alpha is less than 20 degrees, the diffusion effect on the airflow is small, and the noise reduction effect is not ideal; when alpha is more than 30 degrees, the wind speed is obviously reduced, and the wind speed of the whole machine is further reduced.

9. The noise reduction cavity is arranged above the joint of the handle assembly and the machine head, so that the internal structure of the blower is compact.

10. Through making the second installation cavity keep away from the one end of air intake with second cavity transitional coupling, the second installation cavity with the central axis in the chamber of making an uproar falls is the same, reduces the windage, reduces the turbulent flow of wind, and then reduces the noise.

Drawings

Fig. 1 is a schematic diagram of the whole structure of the blower according to the present utility model.

Figure 2 is a cross-sectional view of a blower according to the present utility model.

Figure 3 is a cross-sectional view of a second blower according to the present utility model.

Fig. 4 is a schematic view of the internal structure 1 of the blower according to the present utility model.

Fig. 5 is a schematic view of a disassembled structure of a noise reduction cavity of a blower according to the present utility model.

The names of the components referred to in the figures are as follows:

1. a machine head; 2. a handle assembly; 3. a heating assembly; 4. a fan unit; 5. an air inlet; 6. an air outlet; 7. a noise reduction cavity; 701. a first chamber; 702. a second chamber; 8. a first mounting cavity; 9. a pressure equalizing cavity; 10. a first inner wall; 11. a second inner wall; 12. a second mounting cavity; 13. damping sleeve.

Description of the embodiments

The present utility model will be described in detail with reference to the following embodiments.

As shown in fig. 1 and 2, a noise-reducing blower comprises a handle assembly 2 and a machine head 1 connected with the handle assembly 2, wherein a heating assembly 3 and a fan unit 4 are arranged in the machine head 1, an air inlet 5 is formed in the rear end of the machine head 1, an air outlet 6 is formed in the front end of the machine head 1, a noise-reducing cavity 7 is further formed in the machine head 1, the noise-reducing cavity 7 is located between the fan unit 4 and the heating assembly 3, external air flow enters the machine head 1 from the air inlet 5 under the action of the fan unit 4 and sequentially passes through the fan unit 4, the noise-reducing cavity 7 and the heating assembly 3 and then is blown out from the air outlet 6, and the noise-reducing cavity 7 is outwards diffused from the fan unit 4 along the air flow direction and then converges towards the heating assembly 3. Through the setting of the cavity 7 of making an uproar, and make an uproar the cavity 7 of making an uproar earlier from fan unit 4 out diffusion then to heating element 3 convergence, the air current gets into inside aircraft nose 1 along the straight line from air intake 5, through the setting of making an uproar the cavity 7 of making an uproar, change the original straight line route of air current in aircraft nose 1, make the air current along straight line after fan unit 4, along curve motion again, then along straight line through heating element 3 again, can avoid the air current through fan unit 4 to blow directly to heating element 3, the air current turbulence has been reduced, and then the air current noise is reduced, thereby the purpose of making an uproar falls in the complete machine is played.

In order to further reduce airflow turbulence, reduce airflow noise and reduce air loss, at least part of the side wall of the noise reduction cavity 7 is an arc-shaped surface, and the smooth arc-shaped surface can reduce wind resistance and guide airflow. Further, the side walls of the noise reduction cavity 7 are preferably spherical surfaces. The radius corresponding to the sphere where the spherical surface is positioned is r, r is more than or equal to 1.5cm and less than or equal to 2.5cm, and the diameter of the machine head 1 is enlarged by making r which is more than or equal to 1.5cm and less than or equal to 2.5cm and can be matched with the whole structure of the product to reduce noise without occupying too much space inside the machine; when r is less than 1.5cm, the noise reduction effect is difficult to realize; when r is more than 2.5cm, a larger space is occupied, so that the volume of the machine head 1 is increased. In this example, r=2 cm. The central axis of the machine head 1 passes through the sphere center of the sphere corresponding to the spherical body.

As shown in fig. 2 and 3, a first installation cavity 8 for assembling the heating assembly 3 is further provided in the machine head 1, a pressure equalizing cavity 9 is formed between the rear end of the heating assembly 3 and the rear end of the first installation cavity 8 at intervals, and the pressure equalizing cavity 9 is in smooth transition connection with the noise reducing cavity 7. Through the arrangement of the pressure equalizing cavity 9, the air pressure of the air flow blown to the heating component 3 is balanced, the turbulence of the air is reduced, and then the noise is reduced; meanwhile, through smooth transitional connection of the pressure equalizing cavity 9 and the noise reducing cavity 7, wind resistance is reduced, turbulence of wind is further reduced, noise is reduced, and meanwhile air quantity loss is reduced.

The central axis of the heating component 3, the first mounting cavity 8 and the fan unit 4 is the same as that of the noise reduction cavity 7. The turbulence of wind is reduced, and the airflow noise is further reduced.

The diffusion angle of the noise reduction cavity 7 is alpha, and alpha is more than or equal to 20 degrees and less than or equal to 30 degrees. By making alpha more than or equal to 20 degrees and less than or equal to 30 degrees, high-frequency noise generated by cutting air flow by the fan blade when the fan unit 4 works can be diffused to the cavity, and turbulence of wind can be reduced, so that noise is reduced; when alpha is less than 20 degrees, the diffusion effect on the airflow is small, and the noise reduction effect is not ideal; when alpha is more than 30 degrees, the wind speed is obviously reduced, and the wind speed of the whole machine is further reduced. The convergence angle of the noise reduction cavity 7 is beta, beta is more than or equal to 20 degrees and less than or equal to 30 degrees, and beta=alpha is preferred. The diffusion angle is the included angle between the tangent line of the starting point of the noise reduction cavity 7 and the central axis of the machine head; the convergence angle refers to the included angle between the tangent line of the end point of the noise reduction cavity 7 and the central axis of the machine head.

As shown in fig. 2, 4 and 5, the noise reduction cavity 7 is disposed above the connection portion between the handle assembly 2 and the handpiece 1, so that the internal space of the blower can be fully utilized, and the machine is compact in structure.

As shown in fig. 4 and 5, the machine head 1 further includes a first inner wall 10 and a second inner wall fastened left and right, a second installation cavity 12 for assembling the fan unit 4 is further provided on the first inner wall 10, a damping sleeve 13 is sleeved on the fan unit 4, a first cavity 701 and a second cavity 702 for forming the noise reduction cavity 7 are respectively provided on the first inner wall 10 and the second inner wall, one end of the second installation cavity 12 away from the air inlet 5 is in transitional connection with the second cavity 702, and the central axis of the second installation cavity 12 is the same as that of the noise reduction cavity 7.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a hair-dryer of making an uproar falls, includes handle subassembly, with the aircraft nose that handle subassembly is connected, be equipped with heating element, fan unit in the aircraft nose, the rear end of aircraft nose is equipped with the air intake, the front end is equipped with the air outlet, its characterized in that, still be equipped with in the aircraft nose and fall the chamber of making an uproar, fall the chamber of making an uproar and be located between fan unit and the heating element outside air current is followed under the effect of fan unit the air intake gets into the aircraft nose inside and passes through fan unit in proper order, falls the chamber of making an uproar, heating element after follow the air outlet blows out, fall the chamber of making an uproar along the direction that the air current flows earlier from fan unit out diffusion back to heating element convergence.

2. The blower of claim 1, wherein at least a portion of the side wall of the noise reduction chamber is arcuate.

3. A blower according to claim 2, wherein the sidewalls of the noise reduction chamber are spherical in shape.

4. A blower according to claim 3, wherein the sphere on which the spherical surface is located has a radius r of 1.5 cm.ltoreq.r.ltoreq.2.5 cm.

5. A hair dryer according to claim 3, wherein the central axis of the handpiece passes through the centre of sphere of the spherical surface-corresponding sphere.

6. The blower according to claim 1, wherein a first mounting cavity for mounting the heating assembly is further provided in the handpiece, a pressure equalizing cavity is formed between the rear end of the heating assembly and the rear end of the first mounting cavity, and the pressure equalizing cavity is in smooth transition connection with the noise reducing cavity.

7. The blower of claim 6, wherein the heating assembly, first mounting chamber, fan unit and the noise reduction chamber have the same central axis.

8. A blower according to claim 1, wherein the noise reduction chamber has a diffusion angle α,20 ° or less α or less than 30 °.

9. The hair dryer of claim 1, wherein the noise reduction chamber is disposed above a junction of the handle assembly and the handpiece.

10. The blower of claim 1, wherein the head further comprises a first inner wall and a second inner wall fastened left and right, a second installation cavity for assembling the fan unit is further formed in the first inner wall, a damping sleeve is sleeved on the fan unit, a first cavity and a second cavity for forming the noise reduction cavity are respectively formed in the first inner wall and the second inner wall, one end of the second installation cavity, far away from the air inlet, is in transitional connection with the second cavity, and the central axis of the second installation cavity is the same as that of the noise reduction cavity.