Electric hair drier with high rotating speed and low noise

Abstract

A high-rotating-speed and low-noise electric hair drier comprises an air duct shell, an air inlet, an air outlet, a motor and a motor, the handle shell is mounted at the lower end of the air duct shell; the high-speed motor is connected with flow guide fan blades and drives the flow guide fan blades to rotate; the noise reduction flow guide mechanism forms an internal air duct, and the air inlet communicates with the air outlet through the internal air duct; the noise reduction flow guide mechanism comprises a front noise reduction assembly and a rear noise reduction assembly, the front noise reduction assembly is arranged between the high-speed motor and the air outlet, the rear noise reduction assembly is arranged between the high-speed motor and the air inlet, and the high-speed motor is transversely arranged. Through the arrangement of the rear noise reduction assembly, inlet air can be guided, and inlet air noise is reduced. Through the arrangement of the front noise reduction assembly, outlet air can be guided, the air outlet area can be limited, airflow distribution is more uniform, and air outlet noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hairdressing appliances, in particular to a hair dryer with high rotation speed and low noise. 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 effectively avoid damage caused by high temperature. This type of hair dryer is most famous for 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 82db; 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 US11730245B2, 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 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 75db, and there is also a defect of large noise in use. Summary of the invention

[0008] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a hair dryer with high rotation speed and low noise.

[0009] The utility model solves the technical problem by providing a high-speed and low-noise 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 air flow guiding mechanism includes a front noise reduction component and a rear noise reduction component, wherein the front noise reduction component is arranged between the high-speed motor and the air outlet, and the rear noise reduction component is arranged between the high-speed motor and the air inlet;

[0016] A motor bracket is provided between the front noise reduction component and the rear noise reduction component, the motor bracket includes a small diameter section and a flow expansion section, the high-speed motor is installed in the small diameter section, the small diameter section is connected and conducted with the rear noise reduction component front and back, and the front noise reduction component is connected and conducted with the flow expansion section front and back;

[0017] The high-speed motor is arranged transversely, and the air inlet, high-speed motor, internal air duct and air outlet are arranged in the same direction.

[0018] The utility model is further configured as follows: the rear noise reduction component includes: an air intake grille, on which a plurality of air intake holes are opened; a guide bracket, which 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 circumferentially 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; a honeycomb air intake bracket, wherein the middle area of ​​the honeycomb air intake bracket 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; the 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;

[0019] The front noise reduction component includes: an air duct bracket, which is located at the front end of the motor bracket and at least partially extends into the motor bracket, an arc-shaped air duct that diffuses from the inside to the outside is formed between the air duct bracket and the motor bracket, and the air duct bracket at least partially extends into the expansion section; a converging air outlet bracket, which is arranged between the air duct bracket and the air outlet, has a converging air duct that is larger at the back and smaller at the front, and a heating component is arranged in the converging air duct.

[0020] A further configuration of the utility model 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;

[0021] 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.

[0022] The utility model is further configured 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;

[0023] Furthermore, 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.

[0024] A further configuration of the utility model is that at least one return air hole is provided on the expansion section of the motor bracket, and the return air hole is in conduction with the electric control chamber;

[0025] 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.

[0026] A further configuration of the utility model is that the small diameter section of the motor bracket includes a first body portion and a second body portion, the first body portion and the flow expansion section are integrally formed, and the second body portion is independently formed and detachably connected to the first body portion;

[0027] 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. The positioning ribs can be inserted into the positioning grooves so as to assemble the circuit board assembly on the small diameter section of the motor bracket.

[0028] A further configuration of the utility model is that a heat insulating bracket is also arranged between the concentrated air outlet bracket and the air duct bracket, a heat insulating chamber is formed between the heat insulating bracket and the front end of the concentrated air outlet bracket, a negative ion generator is arranged in the heat insulating 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 insulating chamber and extends into the concentrated air duct.

[0029] A further configuration of the utility model is that a first shock-absorbing rubber pad is provided between the high-speed motor and the inner wall of the small-diameter section;

[0030] The outer edge of the closed portion of the honeycomb air inlet bracket is folded backward to form a edging portion, 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 air duct housing;

[0031] A sealing ring is provided between the rear recess of the honeycomb air intake bracket and the small-diameter section of the motor bracket.

[0032] A further configuration of the utility model is that the heating component has a plurality of heating plate groups, and the heating plate groups correspond to the wind-fixing wings one by one.

[0033] A further configuration of the present invention is that the button assembly is electrically connected to an external power source via a second cable.

[0034] The beneficial effects of the utility model are:

[0035] 1. By setting up the rear noise reduction component, the incoming air can be diverted and the incoming air noise can be reduced.

[0036] 2. By setting up the front noise reduction component, the air outlet can be guided, the air outlet area can be limited, the air flow distribution is more uniform, and the air outlet noise is reduced.

[0037] 3. Use a motor bracket consisting of a small diameter section and a flow expansion section. The small diameter section can meet the installation space requirements of the high-speed motor, and the flow expansion section can play the role of structural transition and uniform flow expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the rear structure of the utility model.

[0039] Figure 2 It is a front structural schematic diagram of the utility model.

[0040] Figure 3 This is a cross-sectional view of the utility model and a partial enlarged schematic diagram of the rear noise reduction component

[0041] Figure 4It is a partially enlarged schematic diagram of the front noise reduction component in the utility model.

[0042] Figure 5 It is an exploded view of the utility model.

[0043] Figure 6 It is a longitudinal sectional view of the utility model (at the guide bracket).

[0044] Figure 7 It is a longitudinal sectional view of the utility model (between the flow guide bracket and the honeycomb air intake bracket).

[0045] Figure 8 It is a longitudinal comparative cross-sectional view of the utility model (front and rear sides of the circuit board assembly).

[0046] Fig. 9 It is a longitudinal sectional view of the utility model (between the motor bracket and the air duct bracket).

[0047] Fig.10 It is a longitudinal sectional view of the utility model (between the concentrated air outlet support and the heat insulation support).

[0048] Fig.11 It is a schematic diagram comparing the structures of the front and rear sides of the guide bracket.

[0049] Fig.12 It is a schematic diagram of the structure of the honeycomb air intake bracket and the air duct bracket.

[0050] Fig.13 It is a comparative schematic diagram of the split structure of the front and rear sides of the motor bracket.

[0051] Fig.14 It is a schematic diagram of the assembly of the concentrated air outlet bracket and the heat insulation bracket.

[0052] In the figure: 1, air cylinder housing; 11, handle inner housing; 101, air inlet; 102, air outlet; 2, handle housing; 21, button assembly; 22, second cable; 3, high-speed motor; 41, air intake grille; 411, air intake pores; 42, air guide bracket; 421, inner circle area; 4211, front convex part; 422, outer ring area; 42a, air intake area; 423, first dividing rib; 423a, horizontal air intake tunnel; 424, second dividing rib; 424a, vertical air intake tunnel; 43, honeycomb air intake bracket; 431, rear concave part; 432, honeycomb hole; 433, closing part; 4331, edging part; 4332, second shock-absorbing rubber pad; 44, motor bracket; 441, small diameter section; 4411, first body part; 4412, second body part; 44 13. Positioning ribs; 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; 452. Fixed air wing; 453. Mounting section; 4531. Card slot; 46. Converging air outlet bracket; 47. Insulation bracket; 471. Insulation chamber; 472. Negative ion generator; 4721. Release end; 473. Third cable; 5. Internal air duct; 51. S-shaped rotary air duct; 52. Arc air duct; 53. Converging air duct; 6. Heating assembly; 61. Heating plate group; 7. Circuit board assembly; 71. Positioning slot. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower"

[0055] The directions or positional relationships indicated by “left”, “right”, “vertical”, “horizontal”, “inside”, “outside”, etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Embodiment 1

[0058] Reference Figure 1 to Figure 14 A high-speed and low-noise hair dryer comprises: a hair dryer shell 1, 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 shell 2, which is installed at the lower end of the hair dryer shell 1, and a button assembly 21 is provided on the handle shell 2; a high-speed motor 3, which is connected with 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, which is arranged in the hair dryer shell 1, and the noise reduction guide mechanism forms an internal air duct 5, and the air inlet 101 is connected to the air outlet 102 through the internal air duct 5; a circuit board assembly 7, which is electrically connected to the electrical components in the hair dryer;

[0059] The noise reduction and air flow guiding mechanism includes a front noise reduction component and a rear noise reduction component, wherein the front noise reduction component is arranged between the high-speed motor 3 and the air outlet 102, and the rear noise reduction component is arranged between the high-speed motor 3 and the air inlet 101;

[0060] Among them, a motor bracket 44 is provided between the front noise reduction component and the rear noise reduction component, and the motor bracket 44 includes a small diameter section 441 and a flow expansion section 442. The high-speed motor 3 is installed in the small diameter section 441, and the small diameter section 441 is connected and conducted with the rear noise reduction component front and back, and the front noise reduction component is connected and conducted with the flow expansion section 442 front and back;

[0061] 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. 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.

[0062] The above content is the basic structural scheme of the utility model. First, through the setting of the rear noise reduction component, the incoming air can be guided to reduce the incoming noise; second, through the setting of the front noise reduction component, the outgoing air can be guided, the outgoing air area can be limited, the air flow distribution is more uniform, and the outgoing noise is reduced; third, a motor bracket 44 composed of a small diameter section 441 and a flow expansion section 442 is adopted. The small diameter section 441 can meet the installation space requirements of the high-speed motor 3, and the flow expansion section 442 can play a role in structural transition and uniform flow expansion.

[0063] A further configuration of the present invention is that the button assembly 21 is electrically connected to an external power source via a second cable 22 .

[0064] Embodiment 2

[0065] Based on the structure of the first embodiment, this embodiment provides a more detailed structural solution. Figure 3 to Figure 14 , as follows:

[0066] 1. Reference Figure 3 , the rear noise reduction components include:

[0067] The air intake grille 41 is provided with a plurality of air intake holes 411 , which can effectively prevent flying catkins and the like from entering the interior of the product and can reduce the return noise from the internal air duct 5 .

[0068] The air guide bracket 42 has an inner circular area 421 and an outer ring area 422. An air intake area 42a is formed between the inner circular area 421 and the outer ring area 422. A plurality of first dividing ribs 423 are arranged circumferentially in the air intake area 42a. 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. A plurality of second dividing ribs 424 are arranged at the front end of the front convex portion 4211. 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 uniform flow of air inlet in each area is achieved.

[0069] The honeycomb air inlet support 43, the middle area of ​​which protrudes toward the air outlet 102 to form a rear concave portion 431, 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 of the rear concave portion 431 on the honeycomb air inlet support 43 and the front convex portion 4211 on the guide support 42, the airflow entering between the 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 horizontal 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, through the setting of the honeycomb holes 432, the airflow can finally only enter the motor bracket 44 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.

[0070] The guide bracket 42 and the honeycomb air intake bracket 43 overlap each other, and the projections of the front convex part 4211 and the rear concave part 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 flow sequence of the airflow be lateral front flow → vertical downward flow → lateral rear flow → vertical downward flow → lateral front flow, which can effectively guide the airflow to form an "S" shape, with both lateral flow and vertical flow, and disperse the noise more comprehensively to various places, thereby reducing the flow noise.

[0071] 2. Reference Figure 4 , the front noise reduction components include:

[0072] The air duct bracket 45 is located at the front end of the motor bracket 44 and at least partially extends into the motor bracket 44. An arc-shaped air duct 52 that diffuses from the inside to the outside is formed between the air duct bracket 45 and the motor bracket 44, and the air duct bracket 45 at least partially extends into the expansion section 442. In order to adapt to the high-speed motor 3, the size of the motor bracket 44 is relatively smaller than the air outlet 102. Through the setting of the air duct bracket 45, the air flow direction is changed through the arc-shaped air duct 52 to produce an outward expansion flow effect to adapt to the position and size of the air outlet 102.

[0073] The air duct support 45 is further configured as follows: the air duct support 45 includes a central arc air guide 451, and a plurality of fixed air wings 452 evenly distributed on the central arc air guide 451, wherein the outer ends of the fixed air wings 452 extend out of the central arc air guide 451 and extend into the concentrated air outlet support 46; wherein the central arc air guide 451 can achieve smooth steering of the airflow and reduce wind resistance. The configuration of the fixed air wings 452 is in line with 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 fixed air 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. Furthermore, in order to achieve the installation of the air duct bracket 45, a connected mounting portion 453 is provided between at least two adjacent wind-fixing wings 452, and a slot 4531 is provided on the mounting portion 453. A buckle 4421 is provided on the inner wall of the expansion section 442, 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.

[0074] The converging air outlet bracket 46 is arranged between the air duct bracket 45 and the air outlet 102, and has a converging air duct 53 that is larger at the back and smaller at the front, and a heating component 6 is arranged in the converging air duct 53. By setting 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.

[0075] 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.

[0076] Embodiment 3

[0077] The preferred location of the circuit board assembly 7 is as follows: Figure 8 , Fig.13 The 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, and a first wire hole 4451 connected to the handle shell 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 to realize the switching of various functions.

[0078] The lower end of the hair dryer housing 1 extends downward to form a handle inner housing portion 11, which is inserted into the handle housing 2. The handle portion forms an inner and outer two-layer module, which is easy to assemble, increases structural strength, and reduces vibration transmission and vibration noise.

[0079] The heat dissipation structure of the circuit board assembly 7 is as follows: 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 connected to 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, thereby reducing the temperature of the circuit board assembly 7, thereby enabling it to operate continuously and stably for a long time.

[0080] Preferably, 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. The setting of the guide portion 4423 ensures that a part of the airflow in the arc-shaped air duct 52 can be introduced into the electric control chamber 445.

[0081] Embodiment 4

[0082] Reference Fig.13 In this embodiment, 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] Reference Figure 3 A plurality of positioning ribs 4413 are provided on the outer wall of the small diameter section 441, and a plurality of positioning grooves 71 are provided on the circuit board assembly 7. 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. The cooperation between the positioning ribs 4413 and the positioning grooves 71 can achieve multi-point positioning, so that the circuit board assembly 7 and the motor bracket 44 are firmly connected together.

[0084] Embodiment 5

[0085] The utility model also adds a negative ion hair care function, and the specific structural scheme is:

[0086] Reference Fig.10, a heat insulation bracket 47 is also provided between the concentrated air outlet bracket 46 and the air duct bracket 45, and a heat insulation chamber 471 is formed between the heat insulation bracket 47 and the front end of the concentrated air outlet bracket 46, and a negative ion generator 472 is provided in the heat insulation chamber 471, and the negative ion generator 472 is electrically connected to the circuit board assembly 7 through the third cable 473, and the release end 4721 of the negative ion generator 472 extends out of the heat insulation chamber 471 and extends into the concentrated air duct 53. The setting of the heat insulation bracket 47, firstly, can provide a heat insulation 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.

[0087] Embodiment 6

[0088] Reference Figure 2-3 The sealing and buffering structures of the present invention are preferably:

[0089] 1. 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, prevent the motor bracket 44 from resonating, and thus play a noise reduction function; the air duct bracket 45 at least partially extends into the expansion section 442 to achieve structural docking between the motor bracket 44 and the air duct bracket 45, and prevent the airflow from escaping from the gap.

[0090] Second, the outer edge of the closed portion 433 of the honeycomb air inlet bracket 43 is folded back to form a rim portion 4331, which surrounds the outer ring area 422 of the 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 rim portion 4331 is provided to provide an installation area for the second shock-absorbing rubber pad 4332, which 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.

[0091] 3. 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.

[0092] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0093] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hair dryer with high speed and low noise, comprising: A fan housing (1) is provided with an air inlet (101) at one end and an air outlet (102) at the other end; A handle housing (2) is mounted on the lower end of the hair dryer 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 draws in external air through the air inlet (101) and then blows it out through the air outlet (102); A noise reduction and flow guiding mechanism, which is arranged in the wind cylinder housing (1), the noise reduction and flow guiding mechanism forming an internal air duct (5), and the air inlet (101) is connected to the air outlet (102) through the internal air duct (5); A circuit board assembly (7) which is electrically connected to electrical components in the hair dryer; It is characterized in that The noise reduction and air flow guiding mechanism comprises a front noise reduction component and a rear noise reduction component, wherein the front noise reduction component is arranged between the high-speed motor (3) and the air outlet (102), and the rear noise reduction component is arranged between the high-speed motor (3) and the air inlet (101); A motor bracket (44) is provided between the front noise reduction component and the rear noise reduction component, the motor bracket (44) comprising a small diameter section (441) and a flow expansion section (442), the high-speed motor (3) is installed in the small diameter section (441), the small diameter section (441) and the rear noise reduction component are connected front to back and are in conduction, and the front noise reduction component and the flow expansion section (442) are connected front to back and are in conduction; The high-speed motor (3) is arranged transversely, 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.

2. A high-speed and low-noise hair dryer according to claim 1, characterized in that: The rear noise reduction component comprises: an air intake grille (41) on which a plurality of air intake holes (411) are formed; a guide bracket (42) having an inner circular area (421) and an outer ring area (422), 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 independent transverse air intake wind tunnels (423a) are formed between adjacent first dividing ribs (423); an edge of the inner circular area (421) protrudes forward to form a front convex portion (4211), and a front end of the front convex portion (4211) is arranged There are a plurality of second dividing ribs (424), and independent vertical air intake wind tunnels (424a) are formed between adjacent second dividing ribs (424); a honeycomb air intake bracket (43), wherein the central 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 front convex closed portion (433); the guide bracket (42) and the honeycomb air intake bracket (43) are overlapped with 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); The front noise reduction component comprises: an air duct support (45), which is located at the front end of the motor support (44) and at least partially extends into the motor support (44), an arc-shaped air duct (52) that diffuses from the inside to the outside is formed between the air duct support (45) and the motor support (44), and the air duct support (45) at least partially extends into the expansion section (442); a converging air outlet support (46), which is arranged between the air duct support (45) and the air outlet (102), and has a converging air duct (53) that is larger at the rear and smaller at the front, and a heating component (6) is arranged in the converging air duct (53).

3. A high-speed and low-noise hair dryer according to claim 2, characterized in that: The air duct support (45) comprises 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 converging air outlet support (46); A mounting portion (453) is connected between at least two adjacent wind-fixing wings (452), a slot (4531) is provided on the mounting portion (453), a buckle (4421) is provided on the inner wall of the expansion section (442), 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.

4. A high-speed and low-noise hair dryer according to claim 2, characterized in that: The expansion section (442) of the motor support (44) further extends backward to form a circuit board support section (444), an electric control chamber (445) is formed between the circuit board support section (444) and the honeycomb air intake support (43), the circuit board assembly (7) is arranged in the electric control chamber (445), and 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) and the button assembly (21); Furthermore, the lower end of the hair dryer housing (1) extends downward to form a handle inner housing portion (11), and the handle inner housing portion (11) is inserted into the handle housing (2).

5. A high-speed and low-noise hair dryer according to claim 4, characterized in that: 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 communication with the electric control chamber (445); The edge of the return air hole (4422) extends inwardly to form a guide portion (4423), and the guide portion (4423) at least partially extends into the arc-shaped air duct (52).

6. A high-speed and low-noise hair dryer according to claim 1, characterized in that: The small-diameter section (441) of the motor bracket (44) comprises a first body (4411) and a second body (4412), wherein the first body (4411) and the diffuser section (442) are integrally formed, and the second body (4412) is independently formed and detachably connected to the first body (4411); A plurality of positioning ribs (4413) are provided on the outer wall of the small-diameter section (441), and a plurality of positioning grooves (71) are provided on the circuit board assembly (7). The positioning ribs (4413) can be inserted into the positioning grooves (71) so as to assemble the circuit board assembly (7) on the small-diameter section (441) of the motor bracket (44).

7. A high-speed and low-noise hair dryer according to claim 2, characterized in that: A heat insulating bracket (47) is also provided between the converging air outlet bracket (46) and the air duct bracket (45), and a heat insulating chamber (471) is formed between the heat insulating bracket (47) and the front end of the converging air outlet bracket (46). A negative ion generator (472) is provided in the heat insulating 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 heat insulating chamber (471) and extends into the converging air duct (53).

8. A high-speed and low-noise hair dryer according to claim 2, characterized in that: A first shock-absorbing rubber pad (443) is provided between the high-speed motor (3) and the inner wall of the small-diameter section (441); The outer edge of the closed portion (433) of the honeycomb air intake bracket (43) is folded backward to form a edging portion (4331), the edging 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 edging portion (4331) and the inner wall of the air duct housing (1); A sealing ring (446) is provided between the rear recess (431) of the honeycomb air intake bracket (43) and the small-diameter section (441) of the motor bracket (44).

9. A high-speed and low-noise hair dryer according to claim 3, characterized in that: The heating component (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).

10. A high-speed and low-noise hair dryer according to claim 4, characterized in that: The button assembly (21) is electrically connected to an external power source via a second cable (22).

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