High speed noise reduction hair dryer

Abstract

A high-speed noise reduction hair dryer includes a hair dryer housing, which is provided with an air inlet and an air outlet; a handle housing; a high-speed motor, which is connected to a guide blade, and the high-speed motor drives the guide blade to rotate; a noise reduction guide mechanism, forming an internal air duct; a circuit board assembly; the noise reduction guide mechanism includes an air intake grille, a guide bracket, a honeycomb air intake bracket, a motor bracket, an air duct bracket and a concentrated air outlet bracket from the air inlet to the air outlet, the guide bracket and the honeycomb air intake bracket overlap each other, and the projections of the front convex part and the rear concave part in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct.

Description

TECHNICAL FIELD

[0001] The invention relates to the technical field of small household appliances, in particular to a high-speed noise-reducing hair dryer.BACKGROUND ART

[0002] Hair dryers are commonly used household appliances, mainly used for drying and shaping hair, and can also be used for local drying, heating and treatment in laboratories, physiotherapy rooms, industrial production, art, etc., and are widely used. In particular, hot hair dryers are used for a variety of purposes, such as drying materials (such as paint and hair), and cleaning or stripping surface layers.

[0003] Existing hair dryers can be roughly divided into two types according to the different air inlet locations:

[0004] One is the rear-intake hair dryer, in which the motor assembly is located at the rear end of the hair dryer body and air is sucked in from the rear end. The sucked air is heated by the heating assembly at the front end of the hair dryer body and then flows out of the body, or flows out after passing through an additional air nozzle. Traditional hair dryers mostly use this air intake method, but due to the influence of the central motor assembly and heating assembly, the central flow velocity of the airflow in the hair dryer is slow and the temperature is high, which brings disadvantages such as poor user experience and reduced life of the motor assembly and heating assembly.

[0005] The second is a handle-type air intake hair dryer. The motor assembly of this type of hair dryer is located inside the handle and inhales air from the bottom of the handle. After the inhaled air passes through the handle, the fluid path is turned and enters the hair dryer body. It is heated by the heating component on the hair dryer body and then flows out of the body, or flows out after passing through an additional nozzle. Most existing high-speed hair dryers use this air intake method, which not only effectively increases the flow rate of the inhaled air flow, but also has a suitable temperature, which can well avoid damage caused by high temperature. This type of hair dryer is most famous for the products of Dyson Technology Co., Ltd., and has become popular all over the world in recent years.

[0006] Prior art example 1, referring to patent document CN104273920B, the applicant Dyson Technology Co., Ltd. discloses a hair care appliance, including a handle, the handle including a wall and an outer wall, wherein the wall defines a main fluid flow path extending from the main fluid inlet into the appliance and the outer wall is the outer surface of the appliance. The outer wall may extend substantially continuously around the wall and along the wall. An isolation layer may be provided between the wall and the outer wall, the isolation layer may be substantially around and along the wall, and may reduce one or more of the noise, vibration and heat generated by the appliance. The handle may include a fan unit for sucking fluid into the main fluid flow inlet and traveling along the main fluid flow path. Through the description and drawings of Example 1, it can be inferred without doubt that in the hair care appliance, the motor is placed vertically in the handle, the air enters from the annular hole at the lower end of the handle, enters the handle after turning 90 degrees, enters the body after turning 90 degrees, and finally sprays out from the front end of the body. Its defects are: 1. During the movement of airflow, it needs to go through multiple large-angle turns of 90 degrees or close to 90 degrees, which will cause a lot of turbulence and lead to a decrease in air outlet speed; 2. Due to the large-angle turns, the airflow will directly and continuously impact the handle and body, resulting in a large noise. The recorded test value is 82 db; 3. The motor is set in the handle, and the user holds the handle to use it. In the absence of a good buffer structure, long-term use can easily cause discomfort in the hand.

[0007] Prior art example 2, referring to patent document U.S. Pat. No. 11,730,245B2, the applicant Lake Electric Co., Ltd. discloses a hair dryer with high heat dissipation efficiency, which belongs to the field of household appliance technology and is designed to solve the problems of poor heat dissipation effect of existing hair dryer motors. The hair dryer with high heat dissipation efficiency of the present invention comprises a body and a heating device arranged in the body, an air duct is formed in the body, and also comprises a heat dissipation device made of heat-conductive material, the heating device is located outside the air duct, and the heat dissipation device is thermally connected to the heating device and is at least partially arranged in the air duct. The hair dryer with high heat dissipation efficiency of the present invention can use cold wind such as natural wind whose temperature is lower than that of the heat dissipation device to take away the heat on the heat dissipation device, thereby achieving the effect of heat dissipation for the heating device, and solving the problem that the main control board in the existing hair dryer cannot dissipate heat well. Through the content description and drawings of Example 2, it can be inferred without doubt that the hair dryer has a motor arranged horizontally in the upper body to form a nearly linear air duct from back to front, and its recorded test value is 75 db, and there is also a defect of relatively large noise in use.SUMMARY

[0008] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a high-speed noise-reducing hair dryer.

[0009] The technical solution of the present invention to solve the technical problem is: a high-speed noise reduction hair dryer, comprising:

[0010] The air duct housing has an air inlet at one end and an air outlet at the other end;

[0011] A handle housing is mounted on the lower end of the hair dryer housing, and a button assembly is provided on the handle housing;

[0012] A high-speed motor is connected to a guide fan blade, and the high-speed motor drives the guide fan blade to rotate, so that the guide fan blade draws in external air through the air inlet and then blows it out through the air outlet;

[0013] A noise reduction and flow guiding mechanism is arranged in the air cylinder housing, the noise reduction and flow guiding mechanism forms an internal air duct, and the air inlet is connected to the air outlet through the internal air duct;

[0014] A circuit board assembly that is electrically connected to electrical components within the hair dryer;

[0015] The noise reduction and flow guiding mechanism includes the following components from the air inlet to the air outlet:

[0016] An air intake grille, on which a plurality of air intake holes are provided;

[0017] The air guide bracket has an inner circle area and an outer ring area, an air intake area is formed between the inner circle area and the outer ring area, a plurality of first dividing ribs are arranged in the circumferential direction in the air intake area, and independent transverse air intake wind tunnels are formed between adjacent first dividing ribs; the edge of the inner circle area protrudes forward to form a front convex portion, a plurality of second dividing ribs are arranged at the front end of the front convex portion, and independent vertical air intake wind tunnels are formed between adjacent second dividing ribs;

[0018] A honeycomb air inlet support, wherein the middle area thereof protrudes toward the air outlet to form a rear concave portion, the rear concave portion is provided with honeycomb holes, and the outer area of the honeycomb holes forms a front convex closed portion;

[0019] The air guide bracket and the honeycomb air intake bracket overlap each other, and the projections of the front convex part and the rear concave part in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct;

[0020] A motor bracket, which is connected to the front end of the rear concave portion and communicates with the honeycomb hole, and the high-speed motor is installed in the motor bracket;

[0021] An air duct support, which is located at the front end of the motor support and at least partially extends into the motor support, and an arc-shaped air duct that spreads from the inside to the outside is formed between the air duct support and the motor support;

[0022] The converging air outlet bracket is arranged between the air duct bracket and the air outlet, and has a converging air duct which is larger at the back and smaller at the front, and a heating component is arranged in the converging air duct.

[0023] In the direction setting of the local structure of the present invention, the high-speed motor is arranged horizontally, and the air inlet, high-speed motor, internal air duct and air outlet are arranged in the same direction.

[0024] The preferred structure of the motor bracket is that the motor bracket includes a small diameter section and a flow expansion section;

[0025] The high-speed motor is installed in the small-diameter section, and a first shock-absorbing rubber pad is arranged between the high-speed motor and the inner wall of the small-diameter section;

[0026] The air duct support at least partially extends into the flow expansion section.

[0027] The preferred structure of the air duct support is that the air duct support includes a central arc air guide portion and a plurality of wind-fixing wings evenly distributed on the central arc air guide portion, and the outer ends of the wind-fixing wings extend out of the central arc air guide portion and extend into the concentrated air outlet support;

[0028] At least two adjacent fixed wind wings are provided with a connected mounting portion, a slot is provided on the mounting portion, a buckle is provided on the inner wall of the expansion section, and the buckle is embedded in the slot so that the air duct bracket and the motor bracket are assembled together.

[0029] The preferred arrangement of the circuit board assembly is that the expansion section of the motor bracket further extends backward to form a circuit board bracket section, an electric control chamber is formed between the circuit board bracket section and the honeycomb air intake bracket, the circuit board assembly is arranged in the electric control chamber, and a first wire hole connected to the handle housing is provided below the electric control chamber, so that a first cable is passed through the first wire hole to electrically connect the circuit board assembly with the button assembly.

[0030] Regarding the heat dissipation structure of the circuit board assembly, at least one return air hole is opened on the expansion section of the motor bracket, and the return air hole is connected to the electric control chamber;

[0031] The edge of the return air hole extends inwardly to form a guide portion, and the guide portion at least partially extends into the arc-shaped air duct.

[0032] A further structure of the motor bracket is that the small diameter section of the motor bracket includes a first body and a second body, the first body is integrally formed with the flow expansion section, and the second body is independently formed and detachably connected to the first body.

[0033] The preferred fixing method for the circuit board assembly is that a plurality of positioning ribs are provided on the outer wall of the small diameter section, and a plurality of positioning grooves are provided on the circuit board assembly, and the positioning ribs can be inserted into the positioning grooves to assemble the circuit board assembly on the small diameter section of the motor bracket.

[0034] Another functional solution of the present invention is that a display screen assembly is provided at the rear end of the air duct shell, and a second wire hole is opened on the honeycomb air intake bracket, so that a second cable is passed through the second wire hole to electrically connect the circuit board assembly with the display screen assembly.

[0035] In the present invention, a heat insulation bracket is arranged between the concentrated air outlet bracket and the air duct bracket, and a heat insulation chamber is formed between the heat insulation bracket and the front end of the concentrated air outlet bracket. A negative ion generator is arranged in the heat insulation chamber. The negative ion generator is electrically connected to the circuit board assembly through a third cable, and the release end of the negative ion generator extends out of the heat insulation chamber and extends into the concentrated air duct.

[0036] Regarding the preferred structure between the honeycomb air intake bracket and the wind duct shell, the outer edge of the closed portion of the honeycomb air intake bracket is folded backward to form a edging portion, and the edging portion surrounds the outer ring area of the guide bracket, and a second shock-absorbing rubber pad is arranged between the edging portion and the inner wall of the wind duct shell.

[0037] The preferred structure between the honeycomb air intake bracket and the motor bracket is that a sealing ring is provided between the rear recess of the honeycomb air intake bracket and the small-diameter section of the motor bracket.

[0038] Preferably, the heating assembly has a plurality of heating plate groups, and the heating plate groups correspond one-to-one to the wind-fixing wings.

[0039] The preferred matching mode of the air cylinder housing and the handle housing is that the lower end of the air cylinder housing extends downward to form an inner housing portion of the handle, and the inner housing portion of the handle is inserted into the handle housing.

[0040] In the present invention, the button assembly is electrically connected to an external power source via a fourth cable.

[0041] The beneficial effects of the present invention are:

[0042] 1. The present invention has a multi-stage noise reduction and flow guiding structure, which reduces turbulence and reduces noise step by step through the characteristics of lateral transmission of noise, and ultimately reduces the noise of the blown airflow. Specifically, they are: First-level noise reduction: multiple air intake holes are used on the air intake grille, which can effectively block flying catkins from entering the product, and can reduce the return noise from the internal air duct; Second-level noise reduction: It has an S-shaped rotary air duct, which is formed between the guide bracket and the honeycomb air intake bracket, and can effectively guide the airflow to form an “S”-shaped movement, with both horizontal and vertical flow, and disperse the noise more comprehensively to all places, thereby reducing the flow noise; Third-level noise reduction: The inner circle area and the rear end of the rear concave part are both arc-shaped edges to reduce obstruction, forming an approximately arc-shaped air guide structure, which minimizes the loss of wind speed and air volume, and reduces wind noise; Fourth-level noise reduction: Through the setting of honeycomb holes, the airflow can only enter the motor bracket through the honeycomb holes. The honeycomb holes can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket, improving stability, reducing impact and noise, and having a good rectification effect on the airflow. At the same time, the noise emitted by the high-speed motor can be blocked by the honeycomb hole structure to reduce the motor noise.

[0043] Second, the high-speed motor is arranged horizontally, and the air inlet, high-speed motor, internal air duct and air outlet are arranged in the same direction. Even if the air outlet, internal air duct and air inlet are in a straight line, compared with the solution where the high-speed motor is arranged in the handle housing, the loss of wind speed and air volume can be greatly reduced, and accordingly the effect of reducing power consumption can be achieved.

[0044] 3. Through the setting of honeycomb holes, the airflow can finally enter the motor bracket only through the honeycomb holes. The honeycomb holes can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket, improving stability, reducing impact and noise, and having a good rectifying effect on the airflow.

[0045] Fourth, by setting the return air hole, part of the airflow in the motor expansion section can be introduced into the electric control chamber through the return air hole, and the airflow in this stage has not passed through the heating component. Therefore, the airflow with a lower temperature can effectively dissipate heat for the circuit board assembly in the electric control chamber, reduce the temperature of the circuit board assembly, and enable it to operate continuously and stably for a long time.

[0046] 5. Through the setting of fixed wind wings, the design conforms to aerodynamics. First, it reduces air resistance; second, it reduces energy loss during airflow flow and improves the efficiency of high-speed motors; third, the fixed wind wings can use force in a specific direction to offset the unstable force of airflow at high speed, making the forward airflow flow more stable.BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG. 1 is a schematic diagram of the rear structure of the present invention.

[0048] FIG. 2 is a schematic diagram of the front structure of the present invention.

[0049] FIG. 3 is an exploded view of the present invention.

[0050] FIG. 4 is a transverse cross-sectional view of the present invention and a partial enlarged schematic view thereof.

[0051] FIG. 5 is a longitudinal cross-sectional view of the present invention (at the air intake grille).

[0052] FIG. 6 is a longitudinal cross-sectional view of the present invention (at the guide bracket).

[0053] FIG. 7 is a longitudinal cross-sectional view of the present invention (between the flow guide bracket and the honeycomb air intake bracket).

[0054] FIG. 8 is a longitudinal comparative cross-sectional view of the present invention (front and rear sides of the circuit board assembly).

[0055] FIG. 9 is a longitudinal cross-sectional view of the present invention (between the motor bracket and the air duct bracket).

[0056] FIG. 10 is a longitudinal cross-sectional view of the present invention (between the concentrated air outlet support and the heat insulation support).

[0057] FIG. 11 is a schematic diagram showing a structural comparison between the front and rear sides of the air guide bracket.

[0058] FIG. 12 is a schematic diagram of the structure of a honeycomb air intake bracket and an air duct bracket.

[0059] FIG. 13 is a schematic diagram showing a comparison of the split structure of the front and rear sides of the motor bracket.

[0060] FIG. 14 is a schematic diagram of the assembly of the concentrated air outlet bracket and the heat insulation bracket.

[0061] In the figure: 1, air cylinder housing; 11, handle inner housing; 101, air inlet; 102, air outlet; 2, handle housing; 21, button assembly; 22, fourth cable; 3, high-speed motor; 4, noise reduction and flow guide mechanism; 41, air intake grille; 411, air intake holes; 42, flow guide bracket; 421, inner circle area; 4211, front convex part; 422, outer ring area; 42a, air intake area; 423, the first a partition rib; 423a, transverse air intake tunnel; 424, second partition rib; 424a, vertical air intake tunnel; 43, honeycomb air intake bracket; 431, rear concave portion; 432, honeycomb hole; 433, closed portion; 4331, hemming portion; 4332, second shock-absorbing rubber pad; 434, second wire hole; 435, second wire cable; 44, motor bracket; 441, small diameter section; 4411, first body portion; 4412. Second body; 4413. Positioning rib; 442. Flow expansion section; 4421. Buckle; 4422. Return air hole; 4423. Drainage section; 443. First shock-absorbing rubber pad; 444. Circuit board bracket section; 445. Electric control chamber; 4451. First wire hole; 4452. First cable; 446. Sealing ring; 45. Air duct bracket; 451. Central arc air guide section; 452. Fixed air wing; 453, installation part; 4531, card slot; 46, focusing air outlet bracket; 47, thermal insulation bracket; 471, thermal insulation chamber; 472, negative ion generator; 4721, release end; 473, third cable; 5, internal air duct; 51, S-shaped rotary air duct; 52, arc-shaped air duct; 53, focusing air duct; 6, heating component; 61, heating plate group; 7, circuit board assembly; 71, positioning groove; 72, display screen assembly.DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.Embodiment 1

[0063] Referring to FIG. 1 to FIG. 14, a high-speed noise reduction hair dryer comprises: a hair cylinder housing 1, as one of the main components of the hair dryer housing, one end of which is provided with an air inlet 101, and the other end of which is provided with an air outlet 102. A handle housing 2, as another main component of the hair dryer housing, is installed at the lower end of the hair cylinder housing 1, and a button assembly 21 is provided on the handle housing 2. A high-speed motor 3 is connected to a guide fan blade, and the high-speed motor 3 drives the guide fan blade to rotate, so that the guide fan blade sucks the outside air through the air inlet 101 and then blows it out through the air outlet 102. A noise reduction guide mechanism 4 is mainly used to guide the airflow, and through the lateral transmission of noise, the noise is reduced step by step, and finally the noise of the airflow transmitted from the air outlet 102 is reduced. The noise reduction guide mechanism 4 is arranged in the hair cylinder housing 1, and the noise reduction guide mechanism 4 forms an internal air duct 5, and the air inlet 101 is connected to the air outlet 102 through the internal air duct 5. The circuit board assembly 7 is electrically connected to the electrical components in the hair dryer.

[0064] The guide blades are preferably integrated with the high-speed motor 3, and therefore are not separately shown in the drawings.

[0065] Different from the prior art, in the present invention, the noise reduction and flow guiding mechanism 4 includes the following in sequence from the air inlet 101 to the air outlet 102:

[0066] The air intake grille 41, as the first part of the structure constituting the internal air duct 5, is provided with a plurality of air intake holes 411, as shown in FIG. 5, through which external air enters the internal air duct 5. The air intake holes 411 can filter the air and block large-sized impurities (such as hair, etc.) in the air, so as to provide good protection for the internal air duct 5. Preferably, the air intake grille 41 is made of metal, which is hard and stable in shape, and can withstand a large air intake pressure;

[0067] The air guide bracket 42, as the second part of the structure constituting the internal air duct 5, has an inner circular area 421 and an outer ring area 422, with reference to FIG. 6 and FIG. 11, wherein an air intake area 42a is formed between the inner circular area 421 and the outer ring area 422, wherein a plurality of first dividing ribs 423 are arranged circumferentially in the air intake area 42a, and an independent transverse air intake wind tunnel 423a is formed between adjacent first dividing ribs 423; the edge of the inner circular area 421 protrudes forward to form a front convex portion 4211, and a plurality of second dividing ribs 424 are arranged at the front end of the front convex portion 4211, and an independent vertical air intake wind tunnel 424a is formed between adjacent second dividing ribs 424. Through the arrangement of the front end of the inner circular area 421 (especially the front convex portion 4211) and the outer ring area 422, the airflow entering the air guide bracket 42 can be effectively guided, specifically, the airflow flows transversely for a distance and then turns to vertical flow. Preferably, the inner circular area 421 adopts an arc-shaped edge to reduce obstruction and form an approximately arc-shaped wind guide structure, which minimizes the loss of wind speed and volume and reduces wind noise. On the other hand, by setting the first dividing rib 423 and the second dividing rib 424, the effect of uniform air flow in each area is achieved;

[0068] The honeycomb air inlet support 43, as the third part of the structure constituting the internal air duct 5, refers to FIGS. 7 and 12, wherein the middle area thereof protrudes toward the air outlet 102 to form a rear concave portion 431, and the rear concave portion 431 is provided with a honeycomb hole 432, and the outer area of the honeycomb hole 432 forms a convex closed portion 433. Through the cooperation between the rear concave portion 431 on the honeycomb air inlet support 43 and the front convex portion 4211 on the flow guide support 42, the airflow entering between the flow guide support 42 and the honeycomb air inlet support 43 can be effectively guided, specifically, the airflow flows vertically for a distance and then turns to lateral flow, and then turns to vertical flow. Preferably, the rear end of the rear concave portion 431 adopts an arc-shaped edge to reduce obstruction and form an approximately arc-shaped airflow steering structure, which minimizes the loss of wind speed and air volume and reduces wind noise. On the other hand, by setting the honeycomb holes 432, the airflow can finally enter the motor bracket 44 only through the honeycomb holes 432. The honeycomb holes 432 can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket 43, improving stability, reducing impact and noise, and having a good rectifying effect on the airflow.

[0069] 4, the air guide bracket 42 and the honeycomb air intake bracket 43 overlap each other, and the projections of the front convex portion 4211 and the rear concave portion 431 in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct 51. Specifically, the S-shaped rotary air duct 51 makes the airflow flow in the order of horizontal front flow→vertical downward flow→horizontal rear flow→vertical downward flow→horizontal front flow;

[0070] The motor bracket 44, as the fourth part of the internal air duct 5, is connected to the front end of the rear recess 431 and communicates with the honeycomb hole 432, as shown in FIG. 13, and the high-speed motor 3 is installed in the motor bracket 44. Preferably, the setting direction of the motor bracket 44 and the high-speed motor 3 is consistent with the setting direction of the air duct housing, which can minimize the wind speed and air volume loss and reduce the power consumption of the whole machine at this stage;

[0071] The air duct bracket 45, as the fifth part of the internal air duct 5, is located at the front end of the motor bracket 44 and at least partially extends into the motor bracket 44, with reference to FIG. 12. An arc-shaped air duct 52 that spreads from the inside to the outside is formed between the air duct bracket 45 and the motor bracket 44. In order to adapt to the high-speed motor 3, the size of the motor bracket 44 is relatively small relative to the air outlet 102. Through the arrangement of the air duct bracket 45, the air flow direction is changed through the arc-shaped air duct 52, and an outward expansion flow effect is generated to adapt to the position and size of the air outlet 102;

[0072] The converging air outlet bracket 46, as the last part of the structure constituting the internal air duct 5, is set between the air duct bracket 45 and the air outlet 102, with reference to FIG. 14, and has a converging air duct 53 that is larger at the back and smaller at the front, and a heating component 6 is set in the converging air duct 53. Through the setting of the heating component 6, the airflow in the last section of the internal air duct 5 (the converging air duct 53) before the air outlet can be heated to eject hot air, and the heat loss can be reduced, the heat utilization rate can be improved, and the temperature of the air outlet 102 can be made more stable. On the other hand, the converging air duct 53 can have the effect of converging and pressurizing the gas, so that the air outlet is more concentrated, the speed is faster, and the air outlet per unit time is larger, so that the user has a better use experience.

[0073] In summary, the basic structural scheme of the present invention is as follows: the airflow movement path when it is started and used is: the airflow enters the guide bracket 42 from the air intake grille 41 (air intake holes 411) set at the air inlet 101 at the rear end of the air duct shell 1, flows along the S-shaped rotary air duct 51 between the air guide bracket 42 and the honeycomb air intake bracket 43, and then flows into the motor bracket 44 after being rectified from the honeycomb hole 432 at the honeycomb air intake bracket 43, and then flows into the arc duct 52 between the air duct bracket 45 and the motor bracket 44 after passing through the motor bracket 44, and then enters the converging air duct 53 in the converging air outlet bracket 46 after passing through the arc duct 52, and the heating component 6 starts and dissipates heat to the outside to heat the nearby air, and the heated airflow is finally discharged from the air outlet 102 at the rear end of the air duct shell 1.

[0074] The noise reduction and flow guiding mechanism 4 in the present invention has a multi-level noise reduction and flow guiding function, which has at least:

[0075] First-level noise reduction: The air intake grille 41 has multiple air intake holes 411, which can effectively prevent flying catkins from entering the interior of the product and reduce the return noise from the internal air duct 5;

[0076] Second-level noise reduction: It has an S-shaped rotary air duct 51 formed between the guide bracket 42 and the honeycomb air intake bracket 43, which can effectively guide the airflow to form an “S” shape, with both horizontal and vertical flows, and disperse the noise more comprehensively to all places, thereby reducing the flow noise;

[0077] Third-level noise reduction: The inner circular area 421 and the rear end of the rear concave portion 431 both have arc-shaped edges to reduce obstruction and form an approximately arc-shaped wind guide structure, thereby minimizing the loss of wind speed and volume and reducing wind noise;

[0078] Fourth level noise reduction: Through the setting of the honeycomb hole 432, the airflow can finally enter the motor bracket 44 only through the honeycomb hole 432. The honeycomb hole 432 can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket 43, improving stability, reducing impact and noise, and having a good rectification effect on the airflow. At the same time, the noise generated by the operation of the high-speed motor 3 can be blocked by the honeycomb hole 432 structure to reduce the motor noise.

[0079] In the direction setting of the present invention, the high-speed motor 3 is arranged horizontally, and the air inlet 101, the high-speed motor 3, the internal air duct 5 and the air outlet 102 are arranged in the same direction. Even if the air outlet 102, the internal air duct 5 and the air inlet 101 are in a straight line, compared with the solution in which the high-speed motor 3 is arranged in the handle housing 2, the loss of wind speed and air volume can be greatly reduced, and accordingly the effect of reducing power consumption can be achieved.Embodiment 2

[0080] Based on the structure of the first embodiment, this embodiment provides a preferred structural solution for each bracket, specifically:

[0081] 1. Motor bracket 44: Referring to FIG. 8, FIG. 9, and FIG. 13, it includes a small diameter section 441 and a flow expansion section 442; wherein the high-speed motor 3 is installed in the small diameter section 441, and the size of the small diameter section 441 is smaller than that of the flow expansion section 442, so as to adapt to the size of the high-speed motor 3 and realize a more stable installation of the high-speed motor 3. In addition, a first shock-absorbing rubber pad 443 is arranged between the high-speed motor 3 and the inner wall of the small diameter section 441 to play a shock-absorbing and buffering role, especially to block most of the vibrations generated when the high-speed motor 3 is running, to prevent the motor bracket 44 from resonating, and then to play a noise reduction function; the air duct bracket 45 at least partially extends into the flow expansion section 442 to realize the structural docking of the motor bracket 44 and the air duct bracket 45, and to prevent the airflow from escaping from the gap.

[0082] Preferably, the small diameter section 441 of the motor bracket 44 includes a first body 4411 and a second body 4412, the first body 4411 and the expansion section 442 are integrally formed, and the second body 4412 is independently formed and detachably connected to the first body 4411 to facilitate the installation, disassembly and maintenance of the high-speed motor 3.

[0083] 2. Air duct bracket 45: Referring to FIG. 4 and FIG. 12, it includes a central arc air guide portion 451, and a plurality of wind-fixing wings 452 evenly distributed on the central arc air guide portion 451, wherein the outer ends of the wind-fixing wings 452 extend out of the central arc air guide portion 451 and extend into the concentrated air outlet bracket 46. Among them, the central arc air guide portion 451 can achieve smooth steering of the airflow and reduce wind resistance. The setting of the wind-fixing wings 452 conforms to the aerodynamic design, firstly, to reduce air resistance; secondly, to reduce energy loss during airflow flow and improve the use efficiency of the high-speed motor 3; thirdly, the wind-fixing wings 452 can provide force in a specific direction to offset the unstable force during high-speed airflow flow, making the forward airflow flow more stable.

[0084] Furthermore, in order to realize the installation of the air duct bracket 45, the preferred method adopted is: at least two adjacent fixed airfoils 452 have a connected mounting portion 453, the mounting portion 453 is provided with a slot 4531, the inner wall of the diffuser section 442 is provided with a buckle 4421, and the buckle 4421 is embedded in the slot 4531, so that the air duct bracket 45 and the motor bracket 44 are assembled together. Preferably, the mounting portions 453 are in even number and arranged symmetrically to make the force more balanced.

[0085] Preferably, the heating assembly 6 has a plurality of heating plate groups 61, and the heating plate groups 61 correspond one-to-one to the wind-fixing wings 452, so that the passing airflow is fully and evenly heated.

[0086] 3. The preferred location of the circuit board assembly 7 is as follows: Referring to FIG. 4 and FIG. 8, the flow expansion section 442 of the motor bracket 44 also extends backward to form a circuit board bracket section 444, and an electric control chamber 445 is formed between the circuit board bracket section 444 and the honeycomb air intake bracket 43. The circuit board assembly 7 is arranged in the electric control chamber 445, so that it can be staggered with the position of the internal air duct 5, eliminating the influence of the airflow on the circuit board assembly 7, so as to ensure that the circuit board assembly 7 can operate in a relatively stable environment. In addition, a first wire hole 4451 connected to the handle housing 2 is provided below the electric control chamber 445, so that a first cable 4452 is passed through the first wire hole 4451 to electrically connect the circuit board assembly 7 with the button assembly 21, so that the user can control the circuit board assembly 7 by pressing the button assembly 21 to switch various functions.

[0087] In order to make the circuit board assembly 7 more stably arranged in the electric control chamber 445, the method adopted is: a plurality of positioning ribs 4413 are arranged on the outer wall of the small diameter section 441, and a plurality of positioning grooves 71 are arranged on the circuit board assembly 7, and the positioning ribs 4413 can be inserted into the positioning grooves 71 to assemble the circuit board assembly 7 on the small diameter section 441 of the motor bracket 44. Through the cooperation of the positioning ribs 4413 and the positioning grooves 71, a multi-point positioning effect can be achieved, so that the circuit board assembly 7 and the motor bracket 44 are stably connected together.

[0088] 4. The heat dissipation structure of the circuit board assembly 7 is as follows: Referring to FIG. 8 and FIG. 9, at least one return air hole 4422 is provided on the expansion section 442 of the motor bracket 44, and the return air hole 4422 is in conduction with the electric control chamber 445. Thus, a part of the airflow at the motor expansion section 442 can be introduced into the electric control chamber 445 through the return air hole 4422, and the airflow at this stage has not passed through the heating assembly 6, so the airflow with a lower temperature can effectively dissipate heat for the circuit board assembly 7 in the electric control chamber 445, reduce the temperature of the circuit board assembly 7, and enable it to operate continuously and stably for a long time.

[0089] Furthermore, the edge of the return air hole 4422 extends inward to form a guide portion 4423, and the guide portion 4423 at least partially extends into the arc-shaped air duct 52. By setting the guide portion 4423, it is ensured that a part of the airflow in the arc-shaped air duct 52 can be introduced into the electric control chamber 445.

[0090] 5. Thermal insulation bracket 47: Referring to FIGS. 10 and 14, a thermal insulation bracket 47 is arranged between the converging air outlet bracket 46 and the air duct bracket 45, and a thermal insulation chamber 471 is formed between the thermal insulation bracket 47 and the front end of the converging air outlet bracket 46. A negative ion generator 472 is arranged in the thermal insulation chamber 471, and the negative ion generator 472 is electrically connected to the circuit board assembly 7 through a third cable 473, and a release end 4721 of the negative ion generator 472 extends out of the thermal insulation chamber 471 and extends into the converging air duct 53. The setting of the heat-insulating bracket 47 can, firstly, provide a heat-insulating chamber 471 to meet the installation and operation conditions of the negative ion generator 472, isolate high temperature, and prevent the high-temperature airflow from burning the negative ion generator 472; secondly, the release end 4721 of the negative ion generator 472 can release negative ions, so that the gas blown out of the air outlet 102 can provide a negative ion effect on the user's hair, thereby keeping the hair moist, reducing static electricity, improving the gloss of the hair, reducing noise and electromagnetic radiation, and protecting the health of the hair.Embodiment 3

[0091] Based on the structure of any of the above embodiments, in order to enrich the display function of the hair dryer, this embodiment provides a preferred solution, specifically: referring to FIGS. 4 and 6, the rear end of the hair dryer housing 1 is provided with a display screen assembly 72, and the honeycomb air inlet bracket 43 is provided with a second wire hole 434, so that a second cable 435 is passed through the second wire hole 434 to electrically connect the circuit board assembly 7 with the display screen assembly 72. The display screen assembly 72 can display information such as real-time temperature, temperature gear, air volume gear, etc., providing a good prompt effect for the user.Embodiment 4

[0092] In order to further improve the sealing, leak-proofing and noise reduction functions, two results are provided in this embodiment, referring to FIG. 4, which are:

[0093] 1. The preferred structure between the honeycomb air inlet bracket 43 and the air duct housing 1 is that the outer edge of the closing portion 433 of the honeycomb air inlet bracket 43 is folded back to form a rim portion 4331, and the rim portion 4331 surrounds the outer ring area 422 of the air guide bracket 42, and a second shock-absorbing rubber pad 4332 is provided between the rim portion 4331 and the inner wall of the air duct housing 1. The setting of the rim portion 4331 provides an installation area for the second shock-absorbing rubber pad 4332, and the second shock-absorbing rubber pad 4332 plays a role of buffering and shock absorption between the honeycomb air inlet bracket 43 and the air duct housing 1, and is conducive to reducing vibration noise.

[0094] Second, the preferred structure between the honeycomb air intake bracket 43 and the motor bracket 44 is that a sealing ring 446 is provided between the rear concave portion 431 of the honeycomb air intake bracket 43 and the small diameter section 441 of the motor bracket 44. The sealing ring 446 can fill the gap and seal, and is helpful to reduce vibration noise.Embodiment 5

[0095] The preferred shell matching structure in the present invention is: referring to FIGS. 3 and 4, the lower end of the hair cylinder shell 1 extends downward to form a handle inner shell part 11, and the handle inner shell part 11 is inserted into the handle shell 2. The handle part forms an inner and outer two-layer module, which is easy to assemble, increases structural strength, and reduces vibration transmission and vibration noise.

[0096] The hair dryer is a high-power electrical appliance, so it is preferably powered by an external power supply. Therefore, the button assembly 21 is electrically connected to the external power supply through the fourth cable 22 to realize power supply for the entire machine.

[0097] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment according to the technical essence of the invention shall still fall within the protection scope of the technical solution of the present invention.

Examples

embodiment 1

[0063]Referring to FIG. 1 to FIG. 14, a high-speed noise reduction hair dryer comprises: a hair cylinder housing 1, as one of the main components of the hair dryer housing, one end of which is provided with an air inlet 101, and the other end of which is provided with an air outlet 102. A handle housing 2, as another main component of the hair dryer housing, is installed at the lower end of the hair cylinder housing 1, and a button assembly 21 is provided on the handle housing 2. A high-speed motor 3 is connected to a guide fan blade, and the high-speed motor 3 drives the guide fan blade to rotate, so that the guide fan blade sucks the outside air through the air inlet 101 and then blows it out through the air outlet 102. A noise reduction guide mechanism 4 is mainly used to guide the airflow, and through the lateral transmission of noise, the noise is reduced step by step, and finally the noise of the airflow transmitted from the air outlet 102 is reduced. The noise reduction guide...

embodiment 2

[0080]Based on the structure of the first embodiment, this embodiment provides a preferred structural solution for each bracket, specifically:[0081]1. Motor bracket 44: Referring to FIG. 8, FIG. 9, and FIG. 13, it includes a small diameter section 441 and a flow expansion section 442; wherein the high-speed motor 3 is installed in the small diameter section 441, and the size of the small diameter section 441 is smaller than that of the flow expansion section 442, so as to adapt to the size of the high-speed motor 3 and realize a more stable installation of the high-speed motor 3. In addition, a first shock-absorbing rubber pad 443 is arranged between the high-speed motor 3 and the inner wall of the small diameter section 441 to play a shock-absorbing and buffering role, especially to block most of the vibrations generated when the high-speed motor 3 is running, to prevent the motor bracket 44 from resonating, and then to play a noise reduction function; the air duct bracket 45 at le...

embodiment 3

[0091]Based on the structure of any of the above embodiments, in order to enrich the display function of the hair dryer, this embodiment provides a preferred solution, specifically: referring to FIGS. 4 and 6, the rear end of the hair dryer housing 1 is provided with a display screen assembly 72, and the honeycomb air inlet bracket 43 is provided with a second wire hole 434, so that a second cable 435 is passed through the second wire hole 434 to electrically connect the circuit board assembly 7 with the display screen assembly 72. The display screen assembly 72 can display information such as real-time temperature, temperature gear, air volume gear, etc., providing a good prompt effect for the user.

TECHNICAL FIELD

[0001] The invention relates to the technical field of small household appliances, in particular to a high-speed noise-reducing hair dryer.BACKGROUND ART

[0002] Hair dryers are commonly used household appliances, mainly used for drying and shaping hair, and can also be used for local drying, heating and treatment in laboratories, physiotherapy rooms, industrial production, art, etc., and are widely used. In particular, hot hair dryers are used for a variety of purposes, such as drying materials (such as paint and hair), and cleaning or stripping surface layers.

[0003] Existing hair dryers can be roughly divided into two types according to the different air inlet locations:

[0004] One is the rear-intake hair dryer, in which the motor assembly is located at the rear end of the hair dryer body and air is sucked in from the rear end. The sucked air is heated by the heating assembly at the front end of the hair dryer body and then flows out of the body, or flows out after passing through an additional air nozzle. Traditional hair dryers mostly use this air intake method, but due to the influence of the central motor assembly and heating assembly, the central flow velocity of the airflow in the hair dryer is slow and the temperature is high, which brings disadvantages such as poor user experience and reduced life of the motor assembly and heating assembly.

[0005] The second is a handle-type air intake hair dryer. The motor assembly of this type of hair dryer is located inside the handle and inhales air from the bottom of the handle. After the inhaled air passes through the handle, the fluid path is turned and enters the hair dryer body. It is heated by the heating component on the hair dryer body and then flows out of the body, or flows out after passing through an additional nozzle. Most existing high-speed hair dryers use this air intake method, which not only effectively increases the flow rate of the inhaled air flow, but also has a suitable temperature, which can well avoid damage caused by high temperature. This type of hair dryer is most famous for the products of Dyson Technology Co., Ltd., and has become popular all over the world in recent years.

[0006] Prior art example 1, referring to patent document CN104273920B, the applicant Dyson Technology Co., Ltd. discloses a hair care appliance, including a handle, the handle including a wall and an outer wall, wherein the wall defines a main fluid flow path extending from the main fluid inlet into the appliance and the outer wall is the outer surface of the appliance. The outer wall may extend substantially continuously around the wall and along the wall. An isolation layer may be provided between the wall and the outer wall, the isolation layer may be substantially around and along the wall, and may reduce one or more of the noise, vibration and heat generated by the appliance. The handle may include a fan unit for sucking fluid into the main fluid flow inlet and traveling along the main fluid flow path. Through the description and drawings of Example 1, it can be inferred without doubt that in the hair care appliance, the motor is placed vertically in the handle, the air enters from the annular hole at the lower end of the handle, enters the handle after turning 90 degrees, enters the body after turning 90 degrees, and finally sprays out from the front end of the body. Its defects are: 1. During the movement of airflow, it needs to go through multiple large-angle turns of 90 degrees or close to 90 degrees, which will cause a lot of turbulence and lead to a decrease in air outlet speed; 2. Due to the large-angle turns, the airflow will directly and continuously impact the handle and body, resulting in a large noise. The recorded test value is 82 db; 3. The motor is set in the handle, and the user holds the handle to use it. In the absence of a good buffer structure, long-term use can easily cause discomfort in the hand.

[0007] Prior art example 2, referring to patent document U.S. Pat. No. 11,730,245B2, the applicant Lake Electric Co., Ltd. discloses a hair dryer with high heat dissipation efficiency, which belongs to the field of household appliance technology and is designed to solve the problems of poor heat dissipation effect of existing hair dryer motors. The hair dryer with high heat dissipation efficiency of the present invention comprises a body and a heating device arranged in the body, an air duct is formed in the body, and also comprises a heat dissipation device made of heat-conductive material, the heating device is located outside the air duct, and the heat dissipation device is thermally connected to the heating device and is at least partially arranged in the air duct. The hair dryer with high heat dissipation efficiency of the present invention can use cold wind such as natural wind whose temperature is lower than that of the heat dissipation device to take away the heat on the heat dissipation device, thereby achieving the effect of heat dissipation for the heating device, and solving the problem that the main control board in the existing hair dryer cannot dissipate heat well. Through the content description and drawings of Example 2, it can be inferred without doubt that the hair dryer has a motor arranged horizontally in the upper body to form a nearly linear air duct from back to front, and its recorded test value is 75 db, and there is also a defect of relatively large noise in use.SUMMARY

[0008] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a high-speed noise-reducing hair dryer.

[0009] The technical solution of the present invention to solve the technical problem is: a high-speed noise reduction hair dryer, comprising:

[0010] The air duct housing has an air inlet at one end and an air outlet at the other end;

[0011] A handle housing is mounted on the lower end of the hair dryer housing, and a button assembly is provided on the handle housing;

[0012] A high-speed motor is connected to a guide fan blade, and the high-speed motor drives the guide fan blade to rotate, so that the guide fan blade draws in external air through the air inlet and then blows it out through the air outlet;

[0013] A noise reduction and flow guiding mechanism is arranged in the air cylinder housing, the noise reduction and flow guiding mechanism forms an internal air duct, and the air inlet is connected to the air outlet through the internal air duct;

[0014] A circuit board assembly that is electrically connected to electrical components within the hair dryer;

[0015] The noise reduction and flow guiding mechanism includes the following components from the air inlet to the air outlet:

[0016] An air intake grille, on which a plurality of air intake holes are provided;

[0017] The air guide bracket has an inner circle area and an outer ring area, an air intake area is formed between the inner circle area and the outer ring area, a plurality of first dividing ribs are arranged in the circumferential direction in the air intake area, and independent transverse air intake wind tunnels are formed between adjacent first dividing ribs; the edge of the inner circle area protrudes forward to form a front convex portion, a plurality of second dividing ribs are arranged at the front end of the front convex portion, and independent vertical air intake wind tunnels are formed between adjacent second dividing ribs;

[0018] A honeycomb air inlet support, wherein the middle area thereof protrudes toward the air outlet to form a rear concave portion, the rear concave portion is provided with honeycomb holes, and the outer area of the honeycomb holes forms a front convex closed portion;

[0019] The air guide bracket and the honeycomb air intake bracket overlap each other, and the projections of the front convex part and the rear concave part in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct;

[0020] A motor bracket, which is connected to the front end of the rear concave portion and communicates with the honeycomb hole, and the high-speed motor is installed in the motor bracket;

[0021] An air duct support, which is located at the front end of the motor support and at least partially extends into the motor support, and an arc-shaped air duct that spreads from the inside to the outside is formed between the air duct support and the motor support;

[0022] The converging air outlet bracket is arranged between the air duct bracket and the air outlet, and has a converging air duct which is larger at the back and smaller at the front, and a heating component is arranged in the converging air duct.

[0023] In the direction setting of the local structure of the present invention, the high-speed motor is arranged horizontally, and the air inlet, high-speed motor, internal air duct and air outlet are arranged in the same direction.

[0024] The preferred structure of the motor bracket is that the motor bracket includes a small diameter section and a flow expansion section;

[0025] The high-speed motor is installed in the small-diameter section, and a first shock-absorbing rubber pad is arranged between the high-speed motor and the inner wall of the small-diameter section;

[0026] The air duct support at least partially extends into the flow expansion section.

[0027] The preferred structure of the air duct support is that the air duct support includes a central arc air guide portion and a plurality of wind-fixing wings evenly distributed on the central arc air guide portion, and the outer ends of the wind-fixing wings extend out of the central arc air guide portion and extend into the concentrated air outlet support;

[0028] At least two adjacent fixed wind wings are provided with a connected mounting portion, a slot is provided on the mounting portion, a buckle is provided on the inner wall of the expansion section, and the buckle is embedded in the slot so that the air duct bracket and the motor bracket are assembled together.

[0029] The preferred arrangement of the circuit board assembly is that the expansion section of the motor bracket further extends backward to form a circuit board bracket section, an electric control chamber is formed between the circuit board bracket section and the honeycomb air intake bracket, the circuit board assembly is arranged in the electric control chamber, and a first wire hole connected to the handle housing is provided below the electric control chamber, so that a first cable is passed through the first wire hole to electrically connect the circuit board assembly with the button assembly.

[0030] Regarding the heat dissipation structure of the circuit board assembly, at least one return air hole is opened on the expansion section of the motor bracket, and the return air hole is connected to the electric control chamber;

[0031] The edge of the return air hole extends inwardly to form a guide portion, and the guide portion at least partially extends into the arc-shaped air duct.

[0032] A further structure of the motor bracket is that the small diameter section of the motor bracket includes a first body and a second body, the first body is integrally formed with the flow expansion section, and the second body is independently formed and detachably connected to the first body.

[0033] The preferred fixing method for the circuit board assembly is that a plurality of positioning ribs are provided on the outer wall of the small diameter section, and a plurality of positioning grooves are provided on the circuit board assembly, and the positioning ribs can be inserted into the positioning grooves to assemble the circuit board assembly on the small diameter section of the motor bracket.

[0034] Another functional solution of the present invention is that a display screen assembly is provided at the rear end of the air duct shell, and a second wire hole is opened on the honeycomb air intake bracket, so that a second cable is passed through the second wire hole to electrically connect the circuit board assembly with the display screen assembly.

[0035] In the present invention, a heat insulation bracket is arranged between the concentrated air outlet bracket and the air duct bracket, and a heat insulation chamber is formed between the heat insulation bracket and the front end of the concentrated air outlet bracket. A negative ion generator is arranged in the heat insulation chamber. The negative ion generator is electrically connected to the circuit board assembly through a third cable, and the release end of the negative ion generator extends out of the heat insulation chamber and extends into the concentrated air duct.

[0036] Regarding the preferred structure between the honeycomb air intake bracket and the wind duct shell, the outer edge of the closed portion of the honeycomb air intake bracket is folded backward to form a edging portion, and the edging portion surrounds the outer ring area of the guide bracket, and a second shock-absorbing rubber pad is arranged between the edging portion and the inner wall of the wind duct shell.

[0037] The preferred structure between the honeycomb air intake bracket and the motor bracket is that a sealing ring is provided between the rear recess of the honeycomb air intake bracket and the small-diameter section of the motor bracket.

[0038] Preferably, the heating assembly has a plurality of heating plate groups, and the heating plate groups correspond one-to-one to the wind-fixing wings.

[0039] The preferred matching mode of the air cylinder housing and the handle housing is that the lower end of the air cylinder housing extends downward to form an inner housing portion of the handle, and the inner housing portion of the handle is inserted into the handle housing.

[0040] In the present invention, the button assembly is electrically connected to an external power source via a fourth cable.

[0041] The beneficial effects of the present invention are:

[0042] 1. The present invention has a multi-stage noise reduction and flow guiding structure, which reduces turbulence and reduces noise step by step through the characteristics of lateral transmission of noise, and ultimately reduces the noise of the blown airflow. Specifically, they are: First-level noise reduction: multiple air intake holes are used on the air intake grille, which can effectively block flying catkins from entering the product, and can reduce the return noise from the internal air duct; Second-level noise reduction: It has an S-shaped rotary air duct, which is formed between the guide bracket and the honeycomb air intake bracket, and can effectively guide the airflow to form an “S”-shaped movement, with both horizontal and vertical flow, and disperse the noise more comprehensively to all places, thereby reducing the flow noise; Third-level noise reduction: The inner circle area and the rear end of the rear concave part are both arc-shaped edges to reduce obstruction, forming an approximately arc-shaped air guide structure, which minimizes the loss of wind speed and air volume, and reduces wind noise; Fourth-level noise reduction: Through the setting of honeycomb holes, the airflow can only enter the motor bracket through the honeycomb holes. The honeycomb holes can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket, improving stability, reducing impact and noise, and having a good rectification effect on the airflow. At the same time, the noise emitted by the high-speed motor can be blocked by the honeycomb hole structure to reduce the motor noise.

[0043] Second, the high-speed motor is arranged horizontally, and the air inlet, high-speed motor, internal air duct and air outlet are arranged in the same direction. Even if the air outlet, internal air duct and air inlet are in a straight line, compared with the solution where the high-speed motor is arranged in the handle housing, the loss of wind speed and air volume can be greatly reduced, and accordingly the effect of reducing power consumption can be achieved.

[0044] 3. Through the setting of honeycomb holes, the airflow can finally enter the motor bracket only through the honeycomb holes. The honeycomb holes can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket, improving stability, reducing impact and noise, and having a good rectifying effect on the airflow.

[0045] Fourth, by setting the return air hole, part of the airflow in the motor expansion section can be introduced into the electric control chamber through the return air hole, and the airflow in this stage has not passed through the heating component. Therefore, the airflow with a lower temperature can effectively dissipate heat for the circuit board assembly in the electric control chamber, reduce the temperature of the circuit board assembly, and enable it to operate continuously and stably for a long time.

[0046] 5. Through the setting of fixed wind wings, the design conforms to aerodynamics. First, it reduces air resistance; second, it reduces energy loss during airflow flow and improves the efficiency of high-speed motors; third, the fixed wind wings can use force in a specific direction to offset the unstable force of airflow at high speed, making the forward airflow flow more stable.BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG. 1 is a schematic diagram of the rear structure of the present invention.

[0048] FIG. 2 is a schematic diagram of the front structure of the present invention.

[0049] FIG. 3 is an exploded view of the present invention.

[0050] FIG. 4 is a transverse cross-sectional view of the present invention and a partial enlarged schematic view thereof.

[0051] FIG. 5 is a longitudinal cross-sectional view of the present invention (at the air intake grille).

[0052] FIG. 6 is a longitudinal cross-sectional view of the present invention (at the guide bracket).

[0053] FIG. 7 is a longitudinal cross-sectional view of the present invention (between the flow guide bracket and the honeycomb air intake bracket).

[0054] FIG. 8 is a longitudinal comparative cross-sectional view of the present invention (front and rear sides of the circuit board assembly).

[0055] FIG. 9 is a longitudinal cross-sectional view of the present invention (between the motor bracket and the air duct bracket).

[0056] FIG. 10 is a longitudinal cross-sectional view of the present invention (between the concentrated air outlet support and the heat insulation support).

[0057] FIG. 11 is a schematic diagram showing a structural comparison between the front and rear sides of the air guide bracket.

[0058] FIG. 12 is a schematic diagram of the structure of a honeycomb air intake bracket and an air duct bracket.

[0059] FIG. 13 is a schematic diagram showing a comparison of the split structure of the front and rear sides of the motor bracket.

[0060] FIG. 14 is a schematic diagram of the assembly of the concentrated air outlet bracket and the heat insulation bracket.

[0061] In the figure: 1, air cylinder housing; 11, handle inner housing; 101, air inlet; 102, air outlet; 2, handle housing; 21, button assembly; 22, fourth cable; 3, high-speed motor; 4, noise reduction and flow guide mechanism; 41, air intake grille; 411, air intake holes; 42, flow guide bracket; 421, inner circle area; 4211, front convex part; 422, outer ring area; 42a, air intake area; 423, the first a partition rib; 423a, transverse air intake tunnel; 424, second partition rib; 424a, vertical air intake tunnel; 43, honeycomb air intake bracket; 431, rear concave portion; 432, honeycomb hole; 433, closed portion; 4331, hemming portion; 4332, second shock-absorbing rubber pad; 434, second wire hole; 435, second wire cable; 44, motor bracket; 441, small diameter section; 4411, first body portion; 4412. Second body; 4413. Positioning rib; 442. Flow expansion section; 4421. Buckle; 4422. Return air hole; 4423. Drainage section; 443. First shock-absorbing rubber pad; 444. Circuit board bracket section; 445. Electric control chamber; 4451. First wire hole; 4452. First cable; 446. Sealing ring; 45. Air duct bracket; 451. Central arc air guide section; 452. Fixed air wing; 453, installation part; 4531, card slot; 46, focusing air outlet bracket; 47, thermal insulation bracket; 471, thermal insulation chamber; 472, negative ion generator; 4721, release end; 473, third cable; 5, internal air duct; 51, S-shaped rotary air duct; 52, arc-shaped air duct; 53, focusing air duct; 6, heating component; 61, heating plate group; 7, circuit board assembly; 71, positioning groove; 72, display screen assembly.DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.Embodiment 1

[0063] Referring to FIG. 1 to FIG. 14, a high-speed noise reduction hair dryer comprises: a hair cylinder housing 1, as one of the main components of the hair dryer housing, one end of which is provided with an air inlet 101, and the other end of which is provided with an air outlet 102. A handle housing 2, as another main component of the hair dryer housing, is installed at the lower end of the hair cylinder housing 1, and a button assembly 21 is provided on the handle housing 2. A high-speed motor 3 is connected to a guide fan blade, and the high-speed motor 3 drives the guide fan blade to rotate, so that the guide fan blade sucks the outside air through the air inlet 101 and then blows it out through the air outlet 102. A noise reduction guide mechanism 4 is mainly used to guide the airflow, and through the lateral transmission of noise, the noise is reduced step by step, and finally the noise of the airflow transmitted from the air outlet 102 is reduced. The noise reduction guide mechanism 4 is arranged in the hair cylinder housing 1, and the noise reduction guide mechanism 4 forms an internal air duct 5, and the air inlet 101 is connected to the air outlet 102 through the internal air duct 5. The circuit board assembly 7 is electrically connected to the electrical components in the hair dryer.

[0064] The guide blades are preferably integrated with the high-speed motor 3, and therefore are not separately shown in the drawings.

[0065] Different from the prior art, in the present invention, the noise reduction and flow guiding mechanism 4 includes the following in sequence from the air inlet 101 to the air outlet 102:

[0066] The air intake grille 41, as the first part of the structure constituting the internal air duct 5, is provided with a plurality of air intake holes 411, as shown in FIG. 5, through which external air enters the internal air duct 5. The air intake holes 411 can filter the air and block large-sized impurities (such as hair, etc.) in the air, so as to provide good protection for the internal air duct 5. Preferably, the air intake grille 41 is made of metal, which is hard and stable in shape, and can withstand a large air intake pressure;

[0067] The air guide bracket 42, as the second part of the structure constituting the internal air duct 5, has an inner circular area 421 and an outer ring area 422, with reference to FIG. 6 and FIG. 11, wherein an air intake area 42a is formed between the inner circular area 421 and the outer ring area 422, wherein a plurality of first dividing ribs 423 are arranged circumferentially in the air intake area 42a, and an independent transverse air intake wind tunnel 423a is formed between adjacent first dividing ribs 423; the edge of the inner circular area 421 protrudes forward to form a front convex portion 4211, and a plurality of second dividing ribs 424 are arranged at the front end of the front convex portion 4211, and an independent vertical air intake wind tunnel 424a is formed between adjacent second dividing ribs 424. Through the arrangement of the front end of the inner circular area 421 (especially the front convex portion 4211) and the outer ring area 422, the airflow entering the air guide bracket 42 can be effectively guided, specifically, the airflow flows transversely for a distance and then turns to vertical flow. Preferably, the inner circular area 421 adopts an arc-shaped edge to reduce obstruction and form an approximately arc-shaped wind guide structure, which minimizes the loss of wind speed and volume and reduces wind noise. On the other hand, by setting the first dividing rib 423 and the second dividing rib 424, the effect of uniform air flow in each area is achieved;

[0068] The honeycomb air inlet support 43, as the third part of the structure constituting the internal air duct 5, refers to FIGS. 7 and 12, wherein the middle area thereof protrudes toward the air outlet 102 to form a rear concave portion 431, and the rear concave portion 431 is provided with a honeycomb hole 432, and the outer area of the honeycomb hole 432 forms a convex closed portion 433. Through the cooperation between the rear concave portion 431 on the honeycomb air inlet support 43 and the front convex portion 4211 on the flow guide support 42, the airflow entering between the flow guide support 42 and the honeycomb air inlet support 43 can be effectively guided, specifically, the airflow flows vertically for a distance and then turns to lateral flow, and then turns to vertical flow. Preferably, the rear end of the rear concave portion 431 adopts an arc-shaped edge to reduce obstruction and form an approximately arc-shaped airflow steering structure, which minimizes the loss of wind speed and air volume and reduces wind noise. On the other hand, by setting the honeycomb holes 432, the airflow can finally enter the motor bracket 44 only through the honeycomb holes 432. The honeycomb holes 432 can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket 43, improving stability, reducing impact and noise, and having a good rectifying effect on the airflow.

[0069] 4, the air guide bracket 42 and the honeycomb air intake bracket 43 overlap each other, and the projections of the front convex portion 4211 and the rear concave portion 431 in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct 51. Specifically, the S-shaped rotary air duct 51 makes the airflow flow in the order of horizontal front flow→vertical downward flow→horizontal rear flow→vertical downward flow→horizontal front flow;

[0070] The motor bracket 44, as the fourth part of the internal air duct 5, is connected to the front end of the rear recess 431 and communicates with the honeycomb hole 432, as shown in FIG. 13, and the high-speed motor 3 is installed in the motor bracket 44. Preferably, the setting direction of the motor bracket 44 and the high-speed motor 3 is consistent with the setting direction of the air duct housing, which can minimize the wind speed and air volume loss and reduce the power consumption of the whole machine at this stage;

[0071] The air duct bracket 45, as the fifth part of the internal air duct 5, is located at the front end of the motor bracket 44 and at least partially extends into the motor bracket 44, with reference to FIG. 12. An arc-shaped air duct 52 that spreads from the inside to the outside is formed between the air duct bracket 45 and the motor bracket 44. In order to adapt to the high-speed motor 3, the size of the motor bracket 44 is relatively small relative to the air outlet 102. Through the arrangement of the air duct bracket 45, the air flow direction is changed through the arc-shaped air duct 52, and an outward expansion flow effect is generated to adapt to the position and size of the air outlet 102;

[0072] The converging air outlet bracket 46, as the last part of the structure constituting the internal air duct 5, is set between the air duct bracket 45 and the air outlet 102, with reference to FIG. 14, and has a converging air duct 53 that is larger at the back and smaller at the front, and a heating component 6 is set in the converging air duct 53. Through the setting of the heating component 6, the airflow in the last section of the internal air duct 5 (the converging air duct 53) before the air outlet can be heated to eject hot air, and the heat loss can be reduced, the heat utilization rate can be improved, and the temperature of the air outlet 102 can be made more stable. On the other hand, the converging air duct 53 can have the effect of converging and pressurizing the gas, so that the air outlet is more concentrated, the speed is faster, and the air outlet per unit time is larger, so that the user has a better use experience.

[0073] In summary, the basic structural scheme of the present invention is as follows: the airflow movement path when it is started and used is: the airflow enters the guide bracket 42 from the air intake grille 41 (air intake holes 411) set at the air inlet 101 at the rear end of the air duct shell 1, flows along the S-shaped rotary air duct 51 between the air guide bracket 42 and the honeycomb air intake bracket 43, and then flows into the motor bracket 44 after being rectified from the honeycomb hole 432 at the honeycomb air intake bracket 43, and then flows into the arc duct 52 between the air duct bracket 45 and the motor bracket 44 after passing through the motor bracket 44, and then enters the converging air duct 53 in the converging air outlet bracket 46 after passing through the arc duct 52, and the heating component 6 starts and dissipates heat to the outside to heat the nearby air, and the heated airflow is finally discharged from the air outlet 102 at the rear end of the air duct shell 1.

[0074] The noise reduction and flow guiding mechanism 4 in the present invention has a multi-level noise reduction and flow guiding function, which has at least:

[0075] First-level noise reduction: The air intake grille 41 has multiple air intake holes 411, which can effectively prevent flying catkins from entering the interior of the product and reduce the return noise from the internal air duct 5;

[0076] Second-level noise reduction: It has an S-shaped rotary air duct 51 formed between the guide bracket 42 and the honeycomb air intake bracket 43, which can effectively guide the airflow to form an “S” shape, with both horizontal and vertical flows, and disperse the noise more comprehensively to all places, thereby reducing the flow noise;

[0077] Third-level noise reduction: The inner circular area 421 and the rear end of the rear concave portion 431 both have arc-shaped edges to reduce obstruction and form an approximately arc-shaped wind guide structure, thereby minimizing the loss of wind speed and volume and reducing wind noise;

[0078] Fourth level noise reduction: Through the setting of the honeycomb hole 432, the airflow can finally enter the motor bracket 44 only through the honeycomb hole 432. The honeycomb hole 432 can absorb part of the fluctuation energy when the gas fluctuates, thereby reducing the impact of the airflow on the honeycomb air intake bracket 43, improving stability, reducing impact and noise, and having a good rectification effect on the airflow. At the same time, the noise generated by the operation of the high-speed motor 3 can be blocked by the honeycomb hole 432 structure to reduce the motor noise.

[0079] In the direction setting of the present invention, the high-speed motor 3 is arranged horizontally, and the air inlet 101, the high-speed motor 3, the internal air duct 5 and the air outlet 102 are arranged in the same direction. Even if the air outlet 102, the internal air duct 5 and the air inlet 101 are in a straight line, compared with the solution in which the high-speed motor 3 is arranged in the handle housing 2, the loss of wind speed and air volume can be greatly reduced, and accordingly the effect of reducing power consumption can be achieved.Embodiment 2

[0080] Based on the structure of the first embodiment, this embodiment provides a preferred structural solution for each bracket, specifically:

[0081] 1. Motor bracket 44: Referring to FIG. 8, FIG. 9, and FIG. 13, it includes a small diameter section 441 and a flow expansion section 442; wherein the high-speed motor 3 is installed in the small diameter section 441, and the size of the small diameter section 441 is smaller than that of the flow expansion section 442, so as to adapt to the size of the high-speed motor 3 and realize a more stable installation of the high-speed motor 3. In addition, a first shock-absorbing rubber pad 443 is arranged between the high-speed motor 3 and the inner wall of the small diameter section 441 to play a shock-absorbing and buffering role, especially to block most of the vibrations generated when the high-speed motor 3 is running, to prevent the motor bracket 44 from resonating, and then to play a noise reduction function; the air duct bracket 45 at least partially extends into the flow expansion section 442 to realize the structural docking of the motor bracket 44 and the air duct bracket 45, and to prevent the airflow from escaping from the gap.

[0082] Preferably, the small diameter section 441 of the motor bracket 44 includes a first body 4411 and a second body 4412, the first body 4411 and the expansion section 442 are integrally formed, and the second body 4412 is independently formed and detachably connected to the first body 4411 to facilitate the installation, disassembly and maintenance of the high-speed motor 3.

[0083] 2. Air duct bracket 45: Referring to FIG. 4 and FIG. 12, it includes a central arc air guide portion 451, and a plurality of wind-fixing wings 452 evenly distributed on the central arc air guide portion 451, wherein the outer ends of the wind-fixing wings 452 extend out of the central arc air guide portion 451 and extend into the concentrated air outlet bracket 46. Among them, the central arc air guide portion 451 can achieve smooth steering of the airflow and reduce wind resistance. The setting of the wind-fixing wings 452 conforms to the aerodynamic design, firstly, to reduce air resistance; secondly, to reduce energy loss during airflow flow and improve the use efficiency of the high-speed motor 3; thirdly, the wind-fixing wings 452 can provide force in a specific direction to offset the unstable force during high-speed airflow flow, making the forward airflow flow more stable.

[0084] Furthermore, in order to realize the installation of the air duct bracket 45, the preferred method adopted is: at least two adjacent fixed airfoils 452 have a connected mounting portion 453, the mounting portion 453 is provided with a slot 4531, the inner wall of the diffuser section 442 is provided with a buckle 4421, and the buckle 4421 is embedded in the slot 4531, so that the air duct bracket 45 and the motor bracket 44 are assembled together. Preferably, the mounting portions 453 are in even number and arranged symmetrically to make the force more balanced.

[0085] Preferably, the heating assembly 6 has a plurality of heating plate groups 61, and the heating plate groups 61 correspond one-to-one to the wind-fixing wings 452, so that the passing airflow is fully and evenly heated.

[0086] 3. The preferred location of the circuit board assembly 7 is as follows: Referring to FIG. 4 and FIG. 8, the flow expansion section 442 of the motor bracket 44 also extends backward to form a circuit board bracket section 444, and an electric control chamber 445 is formed between the circuit board bracket section 444 and the honeycomb air intake bracket 43. The circuit board assembly 7 is arranged in the electric control chamber 445, so that it can be staggered with the position of the internal air duct 5, eliminating the influence of the airflow on the circuit board assembly 7, so as to ensure that the circuit board assembly 7 can operate in a relatively stable environment. In addition, a first wire hole 4451 connected to the handle housing 2 is provided below the electric control chamber 445, so that a first cable 4452 is passed through the first wire hole 4451 to electrically connect the circuit board assembly 7 with the button assembly 21, so that the user can control the circuit board assembly 7 by pressing the button assembly 21 to switch various functions.

[0087] In order to make the circuit board assembly 7 more stably arranged in the electric control chamber 445, the method adopted is: a plurality of positioning ribs 4413 are arranged on the outer wall of the small diameter section 441, and a plurality of positioning grooves 71 are arranged on the circuit board assembly 7, and the positioning ribs 4413 can be inserted into the positioning grooves 71 to assemble the circuit board assembly 7 on the small diameter section 441 of the motor bracket 44. Through the cooperation of the positioning ribs 4413 and the positioning grooves 71, a multi-point positioning effect can be achieved, so that the circuit board assembly 7 and the motor bracket 44 are stably connected together.

[0088] 4. The heat dissipation structure of the circuit board assembly 7 is as follows: Referring to FIG. 8 and FIG. 9, at least one return air hole 4422 is provided on the expansion section 442 of the motor bracket 44, and the return air hole 4422 is in conduction with the electric control chamber 445. Thus, a part of the airflow at the motor expansion section 442 can be introduced into the electric control chamber 445 through the return air hole 4422, and the airflow at this stage has not passed through the heating assembly 6, so the airflow with a lower temperature can effectively dissipate heat for the circuit board assembly 7 in the electric control chamber 445, reduce the temperature of the circuit board assembly 7, and enable it to operate continuously and stably for a long time.

[0089] Furthermore, the edge of the return air hole 4422 extends inward to form a guide portion 4423, and the guide portion 4423 at least partially extends into the arc-shaped air duct 52. By setting the guide portion 4423, it is ensured that a part of the airflow in the arc-shaped air duct 52 can be introduced into the electric control chamber 445.

[0090] 5. Thermal insulation bracket 47: Referring to FIGS. 10 and 14, a thermal insulation bracket 47 is arranged between the converging air outlet bracket 46 and the air duct bracket 45, and a thermal insulation chamber 471 is formed between the thermal insulation bracket 47 and the front end of the converging air outlet bracket 46. A negative ion generator 472 is arranged in the thermal insulation chamber 471, and the negative ion generator 472 is electrically connected to the circuit board assembly 7 through a third cable 473, and a release end 4721 of the negative ion generator 472 extends out of the thermal insulation chamber 471 and extends into the converging air duct 53. The setting of the heat-insulating bracket 47 can, firstly, provide a heat-insulating chamber 471 to meet the installation and operation conditions of the negative ion generator 472, isolate high temperature, and prevent the high-temperature airflow from burning the negative ion generator 472; secondly, the release end 4721 of the negative ion generator 472 can release negative ions, so that the gas blown out of the air outlet 102 can provide a negative ion effect on the user's hair, thereby keeping the hair moist, reducing static electricity, improving the gloss of the hair, reducing noise and electromagnetic radiation, and protecting the health of the hair.Embodiment 3

[0091] Based on the structure of any of the above embodiments, in order to enrich the display function of the hair dryer, this embodiment provides a preferred solution, specifically: referring to FIGS. 4 and 6, the rear end of the hair dryer housing 1 is provided with a display screen assembly 72, and the honeycomb air inlet bracket 43 is provided with a second wire hole 434, so that a second cable 435 is passed through the second wire hole 434 to electrically connect the circuit board assembly 7 with the display screen assembly 72. The display screen assembly 72 can display information such as real-time temperature, temperature gear, air volume gear, etc., providing a good prompt effect for the user.Embodiment 4

[0092] In order to further improve the sealing, leak-proofing and noise reduction functions, two results are provided in this embodiment, referring to FIG. 4, which are:

[0093] 1. The preferred structure between the honeycomb air inlet bracket 43 and the air duct housing 1 is that the outer edge of the closing portion 433 of the honeycomb air inlet bracket 43 is folded back to form a rim portion 4331, and the rim portion 4331 surrounds the outer ring area 422 of the air guide bracket 42, and a second shock-absorbing rubber pad 4332 is provided between the rim portion 4331 and the inner wall of the air duct housing 1. The setting of the rim portion 4331 provides an installation area for the second shock-absorbing rubber pad 4332, and the second shock-absorbing rubber pad 4332 plays a role of buffering and shock absorption between the honeycomb air inlet bracket 43 and the air duct housing 1, and is conducive to reducing vibration noise.

[0094] Second, the preferred structure between the honeycomb air intake bracket 43 and the motor bracket 44 is that a sealing ring 446 is provided between the rear concave portion 431 of the honeycomb air intake bracket 43 and the small diameter section 441 of the motor bracket 44. The sealing ring 446 can fill the gap and seal, and is helpful to reduce vibration noise.Embodiment 5

[0095] The preferred shell matching structure in the present invention is: referring to FIGS. 3 and 4, the lower end of the hair cylinder shell 1 extends downward to form a handle inner shell part 11, and the handle inner shell part 11 is inserted into the handle shell 2. The handle part forms an inner and outer two-layer module, which is easy to assemble, increases structural strength, and reduces vibration transmission and vibration noise.

[0096] The hair dryer is a high-power electrical appliance, so it is preferably powered by an external power supply. Therefore, the button assembly 21 is electrically connected to the external power supply through the fourth cable 22 to realize power supply for the entire machine.

[0097] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment according to the technical essence of the invention shall still fall within the protection scope of the technical solution of the present invention.

Examples

embodiment 1

[0063]Referring to FIG. 1 to FIG. 14, a high-speed noise reduction hair dryer comprises: a hair cylinder housing 1, as one of the main components of the hair dryer housing, one end of which is provided with an air inlet 101, and the other end of which is provided with an air outlet 102. A handle housing 2, as another main component of the hair dryer housing, is installed at the lower end of the hair cylinder housing 1, and a button assembly 21 is provided on the handle housing 2. A high-speed motor 3 is connected to a guide fan blade, and the high-speed motor 3 drives the guide fan blade to rotate, so that the guide fan blade sucks the outside air through the air inlet 101 and then blows it out through the air outlet 102. A noise reduction guide mechanism 4 is mainly used to guide the airflow, and through the lateral transmission of noise, the noise is reduced step by step, and finally the noise of the airflow transmitted from the air outlet 102 is reduced. The noise reduction guide...

embodiment 2

[0080]Based on the structure of the first embodiment, this embodiment provides a preferred structural solution for each bracket, specifically:[0081]1. Motor bracket 44: Referring to FIG. 8, FIG. 9, and FIG. 13, it includes a small diameter section 441 and a flow expansion section 442; wherein the high-speed motor 3 is installed in the small diameter section 441, and the size of the small diameter section 441 is smaller than that of the flow expansion section 442, so as to adapt to the size of the high-speed motor 3 and realize a more stable installation of the high-speed motor 3. In addition, a first shock-absorbing rubber pad 443 is arranged between the high-speed motor 3 and the inner wall of the small diameter section 441 to play a shock-absorbing and buffering role, especially to block most of the vibrations generated when the high-speed motor 3 is running, to prevent the motor bracket 44 from resonating, and then to play a noise reduction function; the air duct bracket 45 at le...

embodiment 3

[0091]Based on the structure of any of the above embodiments, in order to enrich the display function of the hair dryer, this embodiment provides a preferred solution, specifically: referring to FIGS. 4 and 6, the rear end of the hair dryer housing 1 is provided with a display screen assembly 72, and the honeycomb air inlet bracket 43 is provided with a second wire hole 434, so that a second cable 435 is passed through the second wire hole 434 to electrically connect the circuit board assembly 7 with the display screen assembly 72. The display screen assembly 72 can display information such as real-time temperature, temperature gear, air volume gear, etc., providing a good prompt effect for the user.

Claims

1. A high-speed noise reduction hair dryer, comprising:a fan housing is provided with an air inlet at one end and an air outlet at the other end;a handle housing is mounted on the lower end of the hair dryer housing, and a button assembly is provided on the handle housing;a high-speed motor is connected to a guide fan blade, and the high-speed motor drives the guide fan blade to rotate, so that the guide fan blade draws in external air through the air inlet and then blows it out through the air outlet;a noise reduction and flow guiding mechanism, which is arranged in the wind cylinder housing, the noise reduction and flow guiding mechanism forming an internal air duct, and the air inlet is connected to the air outlet through the internal air duct;a circuit board assembly which is electrically connected to electrical components in the hair dryer;characterized in that the noise reduction and flow guiding mechanism comprises, in sequence from the air inlet to the air outlet:an air intake grille having a plurality of air intake holes;a flow guide bracket, comprising an inner circular area and an outer ring area, wherein an air intake area is formed between the inner circular area and the outer ring area, wherein a plurality of first dividing ribs are arranged circumferentially in the air intake area, and independent transverse air intake wind tunnels are formed between adjacent first dividing ribs; an edge of the inner circular area protrudes forward to form a front convex portion, and a plurality of second dividing ribs are arranged at the front end of the front convex portion, and independent vertical air intake wind tunnels are formed between adjacent second dividing ribs;a honeycomb air inlet support, wherein a central region thereof protrudes toward the air outlet to form a rear concave portion, a honeycomb hole is provided on the rear concave portion, and an outer region of the honeycomb hole forms a front-convex closed portion;the air guide bracket and the honeycomb air intake bracket overlap each other, and the projections of the front convex portion and the rear concave portion in the vertical direction partially overlap, thereby forming an S-shaped rotary air duct;a motor bracket connected to the front end of the rear recess and in communication with the honeycomb hole, wherein the high-speed motor is installed in the motor bracket;an air duct support is located at the front end of the motor support and at least partially extends into the motor support, and an arc-shaped air duct that spreads from the inside to the outside is formed between the air duct support and the motor support;the converging air outlet support is arranged between the air duct support and the air outlet, and has a converging air duct that is larger at the rear and smaller at the front, and a heating component is arranged in the converging air duct.

2. The high-speed noise reduction hair dryer according to claim 1, characterized in that: the high-speed motor is arranged horizontally, and the air inlet, the high-speed motor, the internal air duct and the air outlet are arranged in the same direction.

3. The high-speed noise reduction hair dryer according to claim 1, characterized in that: the motor bracket comprises a small-diameter section and a flow expansion section;the high-speed motor is installed in the small-diameter section, and a first shock-absorbing rubber pad is provided between the high-speed motor and the inner wall of the small-diameter section;the air duct support at least partially extends into the flow expansion section.

4. The high-speed noise reduction hair dryer according to claim 3, characterized in that: the air duct support comprises a central arc air guide portion, and a plurality of wind-fixing wings evenly distributed on the central arc air guide portion, and the outer ends of the wind-fixing wings extend out of the central arc air guide portion and extend into the converging air outlet support;at least two adjacent fixed airfoils are provided with a connected mounting portion, a slot is provided on the mounting portion, a buckle is provided on the inner wall of the diffuser section, and the buckle is embedded in the slot, so that the air duct bracket and the motor bracket are assembled together.

5. The high-speed noise reduction hair dryer according to claim 3, characterized in that: the expansion section of the motor bracket further extends backward to form a circuit board bracket section, and an electric control chamber is formed between the circuit board bracket section and the honeycomb air intake bracket, and the circuit board assembly is arranged in the electric control chamber, and a first wire hole connected to the handle shell is provided below the electric control chamber, so that a first cable is passed through the first wire hole to electrically connect the circuit board assembly with the button assembly.

6. The high-speed noise reduction hair dryer according to claim 5, characterized in that: at least one return air hole is provided on the expansion section of the motor bracket, and the return air hole is connected to the electric control chamber;the edge of the return air hole extends inwardly to form a guide portion, and the guide portion at least partially extends into the arc-shaped air duct.

7. The high-speed noise reduction hair dryer according to claim 4, characterized in that the small-diameter section of the motor bracket includes a first body and a second body, the first body and the diffuser section are integrally formed, and the second body is independently formed and detachably connected to the first body.

8. The high-speed noise reduction hair dryer according to claim 4, characterized in that: a plurality of positioning ribs are arranged on the outer wall of the small-diameter section, and a plurality of positioning grooves are arranged on the circuit board assembly, and the positioning ribs can be inserted into the positioning grooves to assemble the circuit board assembly on the small-diameter section of the motor bracket.

9. The high-speed noise reduction hair dryer according to claim 5, characterized in that: a display screen assembly is provided at the rear end of the hair cylinder shell, and a second wire hole is opened on the honeycomb air inlet bracket, so that a second cable is passed through the second wire hole to electrically connect the circuit board assembly with the display screen assembly.

10. The high-speed noise reduction hair dryer according to claim 1, characterized in that: a heat insulation bracket is arranged between the concentrated air outlet bracket and the air duct bracket, and a heat insulation chamber is formed between the heat insulation bracket and the front end of the concentrated air outlet bracket, and a negative ion generator is arranged in the heat insulation chamber, and the negative ion generator is electrically connected to the circuit board assembly through a third cable, and a release end of the negative ion generator extends out of the heat insulation chamber and extends into the concentrated air duct.

11. The high-speed noise reduction hair dryer according to claim 1, characterized in that: the outer edge of the closing portion of the honeycomb air inlet bracket is folded backward to form an edging portion, and the edging portion surrounds the outer ring area of the guide bracket, and a second shock-absorbing rubber pad is provided between the edging portion and the inner wall of the hair cylinder housing.

12. The high-speed noise reduction hair dryer according to claim 4, characterized in that a sealing ring is provided between the rear recess of the honeycomb air inlet bracket and the small-diameter section of the motor bracket.

13. The high-speed noise reduction hair dryer according to claim 4, characterized in that: the heating component has a plurality of heating plate groups, and the heating plate groups correspond one-to-one to the wind-fixing wings.

14. The high-speed noise reduction hair dryer according to claim 1, characterized in that the lower end of the hair cylinder housing extends downward to form a handle inner housing portion, and the handle inner housing portion is inserted into the handle housing.

15. The high-speed noise reduction hair dryer according to claim 1, characterized in that the button assembly is electrically connected to an external power source via a fourth cable.

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