CN114206157A

CN114206157A - Drying apparatus

Info

Publication number: CN114206157A
Application number: CN202180004845.6A
Authority: CN
Inventors: 顾令东
Original assignee: Shenzhen Ruyuan Technology Co ltd
Current assignee: Shenzhen Ruyuan Technology Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-03-18
Also published as: WO2022261987A1

Abstract

Drying apparatus (100) comprising: the air conditioner comprises a shell (10), wherein an air duct (40) is arranged in the shell (10); a wind power assembly (20) located in the housing (10) and adapted to generate an air flow in the air duct (40); the silencing structure (60) is positioned in the air duct (40), a resonance cavity (602) is formed in the silencing structure (60), and micropores (604) communicated with the air duct (40) are formed in the side wall (610) of the silencing structure (60); a power source (50) electrically connected to the wind assembly (20).

Description

Drying apparatus

Technical Field

The application relates to the technical field of drying, in particular to drying equipment.

Background

Drying equipment on the market today, such as blowers, are based on drying with wind and heat. Wind is generated by a motor within the device and heat is typically generated by resistive wires. However, the wind generated when the motor operates may cause a loud noise, and the user experience is poor.

Disclosure of Invention

Embodiments of the present application provide a drying apparatus.

The drying apparatus of an embodiment of the present application includes:

the air duct is arranged in the shell;

a wind assembly located in the housing for generating an airflow in the wind tunnel;

the silencing structure is positioned in the air duct, a resonance cavity is formed in the silencing structure, and micropores communicated with the air duct are formed in the side wall of the silencing structure;

and the power supply is electrically connected with the wind power assembly.

Among the above-mentioned drying equipment, noise cancelling structure is located the wind channel for the air current noise that produces in the wind channel can get into the resonant cavity through the micropore, thereby arouses the air vibration in the resonant cavity to produce the interior friction themogenesis and consume the energy, and then the noise reduction has promoted user experience.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a drying apparatus according to an embodiment of the present application;

FIGS. 2-4 are schematic diagrams of the relationship between the air duct and the radiation source of the drying apparatus according to the embodiment of the present application;

fig. 5 is another schematic structural view of the drying apparatus according to the embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a drying apparatus according to an embodiment of the present application;

fig. 7 is a schematic perspective view of a muffler structure according to an embodiment of the present application;

fig. 8 is a schematic sectional view of a sound-deadening structure of the embodiment of the present application;

fig. 9 is another perspective view of the muffler structure according to the embodiment of the present application;

fig. 10 is another schematic cross-sectional view of the sound-deadening structure according to the embodiment of the present application;

FIG. 11 is an exploded schematic view of a drying apparatus according to an embodiment of the present application;

fig. 12 is a schematic view of the wind speed distribution of the wind outlet of the drying apparatus according to the embodiment of the present application;

fig. 13 is another schematic diagram of the wind speed distribution of the wind outlet of the drying apparatus according to the embodiment of the present application;

fig. 14 is a graph of positive sound absorption coefficients of different frequency bands obtained in theoretical calculation of the sound attenuation structure according to the embodiment of the present application;

fig. 15 is a diagram showing the sound absorbing effect of the muffler structure according to the embodiment of the present application;

FIG. 16 is another schematic cross-sectional view of a drying apparatus according to an embodiment of the present application;

fig. 17 is an enlarged schematic view of a portion a in fig. 16;

fig. 18 is a schematic view of a partial structure of a drying apparatus according to an embodiment of the present application;

fig. 19 is another schematic structural view of a part of the drying apparatus according to the embodiment of the present application;

fig. 20 is a schematic cross-sectional view of a flow guide surface according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The disclosure herein provides many different embodiments or examples for implementing different configurations of the present application. In order to simplify the disclosure of the present application, specific example components and arrangements are described herein. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, a drying apparatus 100 provided in the present embodiment may include a housing 10, a wind power assembly 20, and a heat generating source 30. An air duct 40 is provided in the housing 10. The housing 10 may house various electrical, mechanical and electromechanical components, such as a wind power assembly 20, a heat generating source 30, a control board (not shown), and a power adapter (not shown), among others.

The drying apparatus 100 includes, but is not limited to, a blower, a body dryer, a hand dryer, a bathroom warmer, and the like. In the illustrated embodiment, the drying apparatus 100 is a blower.

The housing 10 may include a body 102 and a handle 104, each of the body 102 and the handle 104 may house at least a portion of the electrical, mechanical, and electromechanical components therein. In some embodiments, the body 102 and the handle 104 may be integrally connected. In some embodiments, the body 102 and the handle 104 may be separate components. For example, the handle 104 may be detachable from the body 102. In one example, the detachable handle 104 may house a power source 50 (e.g., one or more batteries) therein for powering the drying appliance 100. The housing 10 may be made of an electrically insulating material. Examples of the electrical insulating material may include polyvinyl chloride (PVC), polyethylene terephthalate (PET), Acrylonitrile Butadiene Styrene (ABS), polyester, polyolefin, polystyrene, polyurethane, thermoplastic, silicone, glass, fiberglass, resin, rubber, ceramic, nylon, and wood. The housing 10 may also be made of a metallic material coated with an electrically insulating material, or a combination of an electrically insulating material and a metallic material coated or not coated with an electrically insulating material. For example, an electrically insulating material may constitute an inner layer of the housing 10, and a metallic material may constitute an outer layer of the housing 10. In one example, an input assembly 106 is also provided on the handle 104, and the input assembly 106 can be used for a user to operate the drying apparatus, such as to turn the drying apparatus on and off, adjust the motor speed, power of the radiation source, and the like. The input component 106 may include at least one of physical keys, virtual keys, a touch screen. In other embodiments, the drying apparatus 100 may also omit the input component, and the drying apparatus may be controlled by a terminal in communication with the drying apparatus, which may include, but is not limited to, a cell phone, a tablet computer, a wearable smart device, a personal computer, and the like.

The housing 10 may be provided with one or more air ducts 40 therein, and the air ducts 40 may be fixed in the housing 10 to allow the airflow generated by the wind power assembly 20 to flow stably and avoid disturbance of the airflow from outside. The airflow generated by the wind assembly 20 may be directed or regulated through the air duct and toward the user's hair. For example, the air duct 40 may be shaped to regulate at least the velocity, throughput, divergence angle, or swirl strength of the air stream exiting the drying apparatus 100. The air chute 40 may include an intake vent 402 and an exhaust vent 404. In one example, the intake vent 402 and the exhaust vent 404 may be positioned at opposite ends of the drying apparatus 100 along a longitudinal direction of the drying apparatus 100 (e.g., a length direction of the body 102). The intake vent 402 and the outtake vent 404 may each be a vent that allows for efficient airflow throughput. Ambient air may be drawn into the air chute 40 through the intake vent 402 to generate an airflow, and the generated airflow may exit the air chute 40 through the outlet vent 404. The wind power assembly 20 may be located in the wind tunnel 40 of the body 102 or in the wind tunnel 40 of the handle 104, which is not limited herein. The intake vent 402 may also be disposed in the handle 104, or both the handle 104 and the body 102.

The cross-sectional shape of the outlet 404 may be any shape, preferably circular, oval, rectangular (rectangular), square, or various variations of circular and quadrilateral shapes, such as quadrilateral with four corners rounded, etc. And is not particularly limited herein.

In one example, the body 102 defines a duct 40, and the duct 40 is substantially cylindrical. It is understood that in other embodiments, the air duct 40 may have other shapes, such as a funnel shape, a Y-shape, and other regular or irregular shapes, and is not limited thereto.

In one embodiment, the wind assembly 20 is located in the housing 10 and is used to generate an airflow in the wind tunnel 40. In one example, the wind assembly 20 may be disposed within the wind tunnel 40 of the body 102 proximate to the wind intake 402. The wind assembly 20 may include a motor 202 and a blade 204. The blade 204 may include a plurality of blades. When the blades 204 are driven by the motor 202, the rotation of the blades 204 may send ambient air into the air chute 40 through the intake vent 402 to generate an airflow, push the generated airflow through the air chute 40, and expel the airflow from the exhaust vent 404.

In one embodiment, the outer surface of the motor 202 is further provided with a plurality of flow deflectors 206, and the plurality of flow deflectors 206 are uniformly spaced along the circumferential direction of the motor 202. The guide vane may guide an air flow generated when the blade rotates, so that the air flow flows in a desired direction. More specifically, in the embodiment shown in fig. 1, the blades 204 of the motor 202 face the direction of the inlet wind 402, that is, the air flowing through the wind tunnel 40 first passes through the blades 204 and then blows over the peripheral surface of the motor 202, and the air is easily guided by the blades 204 to generate turbulent flow when passing through the blades 204, and then the air flow passes through the plurality of flow deflectors 206 on the peripheral surface of the motor 202 to be guided into a relatively smooth air flow and finally is discharged from the outlet 404.

The wind assembly 20 is shown disposed in the body 102 in fig. 1 and 2, it being understood that in other embodiments, the wind assembly 20 may also be disposed in the handle 104. For example, rotation of the blades 204 may draw air into an intake vent 402 disposed at the handle 104 and push the air through the air chute 40 to an outlet vent 404 disposed at one end of the body 102. The air chute 40 may extend through the handle 104 and the body 102 of the housing 10, respectively. It is understood that in other examples, the blade 204 may be disposed within the air duct 40 and the motor 202 may be disposed outside the air duct 40, and the motor 202 may be connected to the blade 204 via a transmission mechanism, such as a lead screw, a gear, a belt, etc., and drive the blade 204 to rotate.

The heat generating source 30 is housed in the casing 10 and serves to generate heat and guide the heat to the outside of the casing 10. In one example, the heat generating source 30 may be an infrared radiation source for generating and directing infrared radiation outside the housing 10. In other examples, the heat generating source 30 may also be a heating wire that heats air when energized. The wind power assembly 20 is operated to blow heated air out of the housing 10.

The number of the heat generating sources 30 may be single or plural (two or more), and is not particularly limited herein. In one embodiment, the heat generating source 30 is located between the air duct 40 and the housing 10. In this manner, a configuration of the drying apparatus 100 can be realized, as shown in fig. 2 and 3.

In one embodiment, all of the heat generating sources 30 are located outside the air duct 40. The number of the heat generating sources 30 may include a plurality of heat generating sources 30, and all the heat generating sources 30 are located outside the air duct 40, so that during operation, the air flow resistance generated in the air duct 40 is small, which is beneficial to reducing wind noise and wind resistance.

Specifically, the heat generating source 30 is not provided in the air duct 40, and the influence on the wind speed and the wind volume is small, and no additional wind noise is generated. The wind speed and the wind volume have a great influence on the blowing speed. In particular, when the drying apparatus 100 is used for drying hair, the low noise may enhance the user experience as the drying apparatus 100 is close to the ear during hair blowing.

In one embodiment, the heat generating source 30 may be disposed in the circumferential direction of the air duct 40 near the air outlet 404 of the air duct 40. So, on the one hand, when the air current flows out from air outlet 404, the heat that generates heat source 30 parts is taken away by the air current, lets wind temperature rise several degrees (1 ~ 5 degrees), though not enough to produce decisive influence by dry object (like dry hair), has nevertheless promoted the air current and has blown human body after the body and feel, lets the people not feel by cold air current blow, has promoted user experience. On the other hand, the infrared radiation emitted by the heat source 30 is basically not shielded by the air duct 40, which is beneficial to improving the drying efficiency.

In the embodiment shown in fig. 2, a plurality of heat generation sources 30 are disposed around the air outlet 404. In the embodiment shown in fig. 3, the heat generating source 30 is located at one side of the outlet 404.

In one embodiment, the heat generating source 30 is surrounded by a wind tunnel 40. In this manner, another configuration of the drying apparatus 100 may be realized, as shown in fig. 4.

Specifically, in the embodiment shown in fig. 4, the number of heat generation sources is single, and the single heat generation source is surrounded by the air duct 40.

In one embodiment, the number of the heat generating sources 30 is plural, and the plural heat generating sources 30 are dispersedly arranged in the air duct 40.

Thus, the plurality of heat sources 30 distributed in the air duct 40 can avoid the phenomenon that the heat sources 30 are locally overheated or the air duct 40 is locally overheated due to over-concentrated heat.

Specifically, one air duct 40 may be provided with one air outlet 404, and the plurality of heat sources 30 distributed may be disposed in the air outlet 404 of the air duct 40 in a star shape.

In one embodiment, the air duct 40 is provided with a plurality of air outlets 404, and the heat generation source 30 is disposed between adjacent air outlets 404.

Specifically, one air duct 40 may be provided with a plurality of air outlets 404, and the plurality of heat sources 30 distributed may be disposed in the air duct 40 in a star shape. Alternatively, there may be a plurality of air ducts 40, and each air duct 40 is provided with an air outlet 404. The plurality of air outlets 404 may be star-shaped and embedded in the gaps of the plurality of heat sources 30. A hybrid arrangement of the above two is also possible, and is not particularly limited herein.

In one embodiment, the drying apparatus 100 includes a power supply 50, and the power supply 50 is electrically connected to at least one of the heat generating source 30 and the control board. Specifically, the power source 50 may include one or more batteries, which may be rechargeable batteries. The power supply 50 may be a power supply dedicated to the heat source 30, a power supply dedicated to the control board, or a power supply for both the heat source 30 and the control board. The control panel can be connected with a switch, and the on-off of the switch is controlled to control whether the power supply supplies power to the heating source 30. The power supply 50 may electrically connect the wind power assembly 20 and the heat generating source 30 with other consumers of electricity within the drying apparatus 100. The battery 50 includes a plurality of battery cells 502 and a protective plate 504, where the number of the battery cells 502 is plural, and the plurality of battery cells 502 may be connected in series, or in parallel, or in series and parallel. The protection board 504 may comprise a BMS board, i.e. a circuit board carrying a power management system. The BMS board may control charging and discharging of the battery cell 502 and implement protection measures for the battery when the battery is over-voltage, over-current or over-temperature.

In one embodiment, the wind assembly 20 is located downstream of at least a portion of the power source in the direction of air flow. Therefore, the heat generated during the working of the power supply is taken away by the wind of the motor, and the normal working of the power supply is ensured.

The power source 50 may include a plurality of batteries, and the wind power assembly 20 may be located downstream of all batteries in the air flow direction, or the wind power assembly 20 may be located between a plurality of batteries, such as the handle 104 with the batteries in the lower portion, the wind power assembly 20 in the middle portion, the batteries in the upper portion, the batteries in the lower portion, the wind power assembly 20 in the upper portion, and the batteries in the body 102. In this way, the airflow generated by the wind power assembly 20 may flow through at least part of the power supply, such that the portion of the power supply blown through by the airflow may be dissipated.

In addition, the power source 50 is typically heavier than the wind assembly 20, and the wind assembly 20 is located downstream of at least a portion of the power source 50 to avoid the drying apparatus 100 being heavy. Further, the wind resistance of the airflow generated by the wind power assembly 20 may also be reduced.

When the power supply 50 is disposed in the handle 104, an auxiliary air duct 42 is formed between an outer wall of the power supply 50 and an inner wall of the handle 104, and the auxiliary air duct 42 is communicated with the air duct 40. In this manner, heat generated by the power supply may enter the air duct 40 via the auxiliary air duct 42 and be carried outside the drying apparatus 100 by the air flow in the air duct 40, so that the power supply 50 can operate in a suitable temperature range.

The heat generating source 30 may include a reflective cup 302 and a glowing member 304, the glowing member 304 being positioned within the reflective cup 302.

Specifically, in one embodiment, the glowing member 304 can emit radiation in the infrared band, which can include radiation in the far infrared band, radiation in the near infrared band, and the like. In one example, the infrared band of radiation emitted by the glowing member 304 can cover an infrared spectrum of 0.7 μm or more. In one example, the wavelength of the infrared radiation emitted by the light emitting member 304 is in the range of 0.7 μm to 20 μm.

In further examples, the radiation emitted by the light emitting member 304 may substantially cover the visible spectrum from 0.4 μm to 0.7 μm and the infrared spectrum above 0.7 μm.

In one embodiment, the light emitting member 304 includes at least one of a halogen lamp, a ceramic, a graphene, and a light emitting diode.

Specifically, examples of the ceramic may include a Positive Temperature Coefficient (PTC) heater and a cermet heater (MCH). The ceramic light emitter 304 comprises a metallic heating element embedded in a ceramic, such as tungsten embedded in silicon nitride or silicon carbide. The glowing member 304 can be provided in the form of a wire (e.g., a filament). The wire may be patterned (e.g., formed as a spiral filament) to increase its length and/or surface. The glowing member 304 can also be provided in the form of a rod. In one example, the glowing member 304 can be a silicon nitride rod, a silicon carbide rod, or a carbon fiber rod having a predetermined diameter and length.

The light emitting member 304 may be selected from one of a halogen lamp, a ceramic, graphene, and a light emitting diode, or the light emitting member 304 may be selected from a combination of two or more of a halogen lamp, a ceramic, graphene, and a light emitting diode. And is not particularly limited herein.

The reflector cup 302 may be configured to adjust the direction of radiation emitted from the glowing member 304. For example, the reflector cup 302 may be configured to reduce the divergence angle of the reflected radiation beam.

The reflective surface of the reflector cup 302 may be coated with a coating material having a high reflectivity for the wavelength or wavelength range of the radiation emitted by the luminescent member 304. For example, the coating material may have high reflectivity for wavelengths in both the visible and infrared spectrum. Materials with high reflectivity can have high efficiency in reflecting radiant energy. Examples of the coating material may include a metal material and a dielectric material. The metal material may include, for example, silver and aluminum.

In one embodiment, the axial cross-section of the reflective surface of the reflector cup 302 is in the shape of a polynomial curve. In this way, the reflective surface can be formed with a focal point to facilitate directing infrared radiation and reducing the divergence angle of the reflected radiation beam.

Specifically, the polynomial curve may have a shape including a parabola, an ellipse, a hyperbola, and the like. In one example, the axial cross-section of the reflective surface of the reflector cup 302 is parabolic in shape.

In one embodiment, the light emitter 304 is disposed at a focal point of the reflective surface of the reflector cup 302. In this way, the infrared beam emitted by the light-emitting member 304 can be reflected by the reflecting surface and then emitted out of the opening of the reflecting cup 302 in a substantially parallel manner, so that the infrared radiation emitted by the drying apparatus 100 has good directivity.

Specifically, the light-emitting member 304 is disposed at a focus of the reflective surface of the reflective cup 302, and the infrared radiation beams emitted by the light-emitting member 304 at the focus are emitted from the opening of the reflective cup 302 substantially in parallel after being reflected by the reflective surface of the reflective cup 302.

In other embodiments, the glowing member 304 can also be positioned off the focal point of the parabola such that the reflected infrared radiation beam can converge or diverge at a distance in front of the drying apparatus 100. The position of the light-emitting member 304 within the reflector cup 302 is adjustable, thereby changing the degree of convergence and/or direction of the output radiation beam. The shape of the reflector cup 302 and the shape of the glowing member 304 may be optimized and varied with respect to each other to output a desired heating power at a desired location of the drying apparatus 100.

In addition, a thermal insulating material (e.g., glass fiber, mineral wool, cellulose, polyurethane foam, or polystyrene) may be interposed between the light emitting member 304 and the reflective cup 302 such that the light emitting member 304 is thermally insulated from the reflective cup 302. The thermal insulation may keep the temperature of the reflector cup 302 from increasing even if the temperature of the light emitter 304 is high.

In one embodiment, the drying apparatus 100 further includes a control board electrically connected to the heat generating source 30 and/or the wind power assembly 20. In this way, control of the drying apparatus 100 can be achieved.

Specifically, the control board may include a circuit board and various components mounted on the circuit board, such as a processor, a controller, a power supply 50, a switching circuit, a detection circuit, and the like. The control board may electrically connect the heat generating source 30 and the wind power assembly 20, and other electrical components, such as lighting lamps, indicator lamps, sensors, etc. The control board is used to control the operation of the drying apparatus 100, including but not limited to controlling the operation mode, operation duration, motor speed, power of the heat generating source 30, and the like of the drying apparatus 100.

The control board may convert the voltage of the power source 50 into a voltage suitable for the heat generating source 30 corresponding to the operation mode of the drying apparatus 100 and a voltage of the wind power assembly 20 so that the heat generating source 30 and the wind power assembly 20 can operate in the operation mode. For example, by adjusting the voltage, the radiation power of the heat generating source 30, the rotation speed of the wind power assembly 20 (i.e., the rotation speed of the fan blades), and the like can be adjusted. Or the power supply 50 is turned on or off to control the operation time of the heat generating source 30 and the wind power assembly 20. It is understood that in other embodiments, the power source 50, the control board, the heat generating source 30 and the wind power assembly 20 may be connected in other manners. In one example, the power supply 50 may be mounted in the handle 104.

In one embodiment, the power supply 50 includes a rechargeable battery. Thus, the drying equipment 100 can be separated from the constraint of the wiring harness when in use, and the user experience is improved.

In particular, the rechargeable battery may be a lithium ion battery, or other rechargeable battery. And is not particularly limited herein. In addition, to facilitate charging of the battery, the body 102 or the handle 104 may be provided with a charging interface. It is understood that the charging interface may be a wired charging interface or a wireless charging interface, and is not limited in particular. In addition, a battery cover may be provided on the handle 104 for facilitating removal of the battery, and the battery cover may be removable for facilitating removal and installation of the battery.

In one embodiment, referring to fig. 5 and fig. 6, the drying apparatus 100 further includes a sound-absorbing structure 60, the sound-absorbing structure 60 is located in the air duct 40, a resonant cavity 602 is formed in the sound-absorbing structure 60, and a side wall 610 of the sound-absorbing structure 60 is opened with a micro-hole 604 communicating with the air duct 40. Thus, the muffling structure 60 is located in the air duct 40, when the air flow passes through the end face of the muffling structure 60, the air flow noise generated in the air duct 40 can enter the resonant cavity 602 through the micro holes 604, so as to cause the air in the resonant cavity 602 to vibrate, thereby generating internal friction heat to consume energy, further reducing noise, and improving user experience.

Specifically, the sound attenuating structure 60 with the micro-holes 604 is a low acoustic mass, high acoustic resistance sound absorbing structure. When the frequency of the noise in the air duct 40 is the same as the resonance frequency of the resonance chamber 602 (acoustic chamber), the air in the resonance chamber 602 is caused to vibrate to generate internal friction heat, thereby consuming energy and reducing the noise. The micro-hole 604 structure increases the flow resistance of the fluid in the hole, thereby increasing the acoustic resistance, and enabling the sound-deadening structure 60 to have a good sound-deadening effect in a larger sound-deadening bandwidth.

The sound attenuating structure 60 includes a front wall 606, a rear wall 608, and a side wall 610 connecting the front wall 606 and the rear wall 608, and the front wall 606 is closer to the air outlet 404 of the air duct 40 than the rear wall 608. The front wall 606 has a front face. In fig. 6, the pores 604 open in the side wall 610 of the sound attenuating structure 60, and the front wall 606 and the rear wall 608 are closed walls. The wind assembly 20 is located outside the rear wall 608.

The sound attenuating structure 60 may be a single molded structure or may be a structure formed by connecting several sub-structures.

In one embodiment, referring to FIG. 6, the wind assembly 20 includes a blade 204 positioned in the wind tunnel 40, and the sound attenuating structure 60 is positioned downstream of the blade 204. Thus, the noise elimination structure 60 can eliminate the noise of the airflow generated when the blade 204 rotates, and the noise reduction effect can be improved.

Specifically, the flow velocity of the airflow generated when the blade 204 rotates is large, the generated noise is also large, the noise elimination structure 60 located downstream of the blade 204 can eliminate the noise of the airflow, and compared with the case that the noise elimination structure 60 is placed upstream of the blade 204, the noise can be eliminated to the maximum extent, and the noise reduction effect is improved.

It is understood that in other embodiments, the vanes 204 may be located anywhere in the wind tunnel 40, and the sound attenuating structure 60 is located in the wind tunnel 40, and the airflow passes around the sound attenuating structure 60, thereby achieving sound and noise reduction.

In one embodiment, the wind assembly 20 includes a blade 204 positioned in the wind tunnel 40, and the sound attenuating structure 60 is disposed coaxially with the blade 204. Thus, the generation of additional noise can be avoided.

Specifically, the blades 204 generate an airflow having a wind field that is substantially cylindrical when rotated. The silencing structure 60 is coaxially arranged with the blades 204, so that the silencing structure 60 is located in the middle of the wind field, the wind pressure around the silencing structure 60 is basically equal, and extra noise caused by wind pressure difference due to position deviation of the silencing structure 60 is avoided.

In one embodiment, the sound attenuating structure 60 is located on the axis L of the air chute 40. So, can be so that form an even annular wind channel 40 between sound-attenuating structure 60 and the wind channel 40 inner wall, the air output in this annular wind channel 40 is also comparatively even for the produced air current of wind-force subassembly 20 is comparatively dispersed, has promoted dry experience, and in particular, to the hair-dryer, can promote to blow and send experience.

In particular, in the related art, if the fan directly blows out the columnar air flow through the through hole, the drying device 100 such as a blower is prone to cause the air volume concentration, that is, the wind power in the central area is too large, the whole blowing coverage area is small, and the blowing experience is poor. The sound-attenuating structure 60 of this application embodiment itself except eliminating the noise, also can carry out the effect that disperses the amount of wind in fact, prescribes a limit to annular wind channel 406 between the outer wall of sound-attenuating structure 60 and wind channel 40 inner wall, changes cylindrical air current and is the annular air-out, reaches the effect of killing two birds with one stone.

Further, the present application includes an embodiment that uses a heating wire (e.g., a resistance wire) to generate heat and blow out hot air, and an embodiment that uses an infrared radiation source to transfer heat in a thermal radiation manner, where the thermal radiation of the latter embodiment is inferior to that of the former embodiment in terms of heat transfer, so as to achieve the same drying effect (e.g., blowing effect), the drying device of the latter embodiment needs to use a larger air volume, i.e., a high-speed motor to blow out air, and the larger air volume causes a larger wind noise, so that the drying device of the latter embodiment needs a more efficient noise reduction device than the drying device of the former embodiment. Therefore, cylindrical air flow is further changed into annular air outlet, and the noise reduction effect is more obvious.

In one embodiment, the sound attenuating structure 60 is disposed proximate to the air outlet 404 of the air chute 40. In this way, the user's perception of noise may be reduced.

Specifically, because the air outlet 404 of the air duct 40 is closer to the user, the sound-deadening structure 60 is close to the air outlet 404 of the air duct 40, and the sound can be deadened at a position closer to the user, so that the perception of the user on noise can be reduced, and the user experience can be improved. Moreover, the silencing structure 60 arranged close to the air outlet 404 of the air duct 40 is also beneficial to the dispersion of the air volume.

In one embodiment, referring to FIG. 6, the sound attenuating structure 60 is attached to the inner wall of the air duct 40. In this manner, the fixing of the muffler structure 60 can be achieved.

Specifically, the sound attenuating structure 60 is connected to the inner wall of the air duct 40. The inner wall of the air duct 40 may be a section of the entire wall of the air duct 40, for example, the sound-damping structure 60 is connected to the inner wall of the air duct 40 near the air outlet 404 of the air duct 40.

It is understood that in other embodiments, the sound attenuating structure 60 may be connected to the housing 10, or the sound attenuating structure 60 may be connected to the heat generating source 30, or the sound attenuating structure 60 may be connected to the inner wall of the wind tunnel 40 and the housing 10, or the sound attenuating structure 60 may be connected to the inner wall of the wind tunnel 40 and the heat generating source 30, or the sound attenuating structure 60 may be connected to the inner wall of the wind tunnel 40, the housing 10, and the heat generating source 30.

In one embodiment, referring to fig. 7, the sound-deadening structure 60 is connected to the inner wall of the air duct 40 by a plurality of first connecting ribs 612, the plurality of first connecting ribs 612 are connected to the side wall 610 of the sound-deadening structure 60 along the circumferential direction of the sound-deadening structure 60, and a flow-guiding channel 614 is formed between two adjacent first connecting ribs 612. In this way, the plurality of first connecting ribs 612 can fix the sound attenuating structure 60 and the formed flow guiding channels 614 can also function as a flow guiding channel.

Specifically, the first connecting rib 612 has a flat and long shape, and the length direction thereof is along the axial direction of the air duct 40. One end of the upper side of the first connecting rib 612 is connected to the inner wall of the air duct 40, and the entire lower side is connected to the outer surface of the side wall 610 of the sound-deadening structure 60. A flow guide channel 614 is formed between two adjacent first connecting ribs 612, and a plurality of flow guide channels 614 are arranged along the circumferential direction of the sound-deadening structure 60. Preferably, the first connecting ribs 612 are uniformly arranged along the circumferential direction of the sound-deadening structure 60, and the flow-guiding channels 614 formed in this way are also uniformly arranged along the circumferential direction of the sound-deadening structure 60, which is favorable for uniform dispersion of air volume and improves user experience. The first plurality of connecting ribs 612 substantially partition the annular air duct 406 into a plurality of flow guide channels 614, and each flow guide channel 614 is fan-shaped.

In the example shown in fig. 7, the number of the first coupling ribs 612 is 5, and the number of the formed flow guide channels 614 is 5.

In one embodiment, the sound attenuating structure 60 is connected to the inner wall of the air duct 40 by a plurality of first connecting ribs 612, and the outer wall of the air duct 40 is provided with a mounting portion 616. In this manner, installation of the sound attenuating structure 60 within the housing 10 is facilitated.

Specifically, the mounting portion 616 may be connected with a mounting structure (not shown) in the housing 10, so as to achieve the mounting and fixing of the sound attenuating structure 60. In the illustrated example, the mounting portion 616 is protruded from the outer wall of the air duct 40, the mounting portion 616 is provided with a screw hole, and the mounting structure in the housing 10 may be provided with another screw hole, which is connected with the two screw holes by screws and threads, so as to mount and fix the sound-deadening structure 60.

In the illustrated embodiment, the number and positions of the mounting portions 616 may correspond to the number and positions of the first connecting ribs 612, that is, the number of the mounting portions 616 is the same as the number of the first connecting ribs 612, and one mounting portion 616 is corresponding to one first connecting rib 612 and is respectively located at the outer side and the inner side of the wall of the air duct 40, so that the structural strength of the mounting portions 616 can be ensured, and the sound-deadening structure 60 can be stably mounted.

In one embodiment, referring to fig. 9 and 11, the mounting portion 616 has a mounting post 618, the heat source 30 includes a reflective cup 302, a protrusion 620 is disposed on an outer wall of the reflective cup 302, the protrusion 620 has a mounting hole 622, and the mounting post 618 penetrates the mounting hole 622. Thus, the sound attenuation structure 60 can be mounted and fixed on the reflection cup 302.

Specifically, in the example of fig. 11, the mounting post 618 is a cylinder, and correspondingly, the mounting hole 622 is also a cylindrical hole with a cutout. It is understood that in other embodiments, the mounting post 618 may have other regular or irregular shapes, and the mounting aperture 622 may have a shape that conforms to the shape of the mounting post 618. In addition, the outer diameter of the mounting post 618 may be equal to or slightly larger than the inner diameter of the mounting hole 622, so that the mounting post 618 can be stably mounted in the mounting hole 622 without shaking.

It is understood that in other embodiments, the sound-deadening structure 60 is connected to the casing 10 by the plurality of first connecting ribs 612, or the sound-deadening structure 60 is connected to the heat-generating source 30 by the plurality of first connecting ribs 612, or the sound-deadening structure 60 is connected to the inner wall of the air duct 40 and the casing 10 by the plurality of first connecting ribs 612, or the sound-deadening structure 60 is connected to the casing 10 and the heat-generating source 30 by the plurality of first connecting ribs 612, or the sound-deadening structure 60 is connected to the inner wall of the air duct 40, the casing 10 and the heat-generating source 30 by the plurality of first connecting ribs 612.

In one embodiment, referring to fig. 4, the heat generating source 30 is surrounded by the air duct 40, the heat generating source 30 includes a reflective cup 302, and the sound attenuating structure 60 is attached to an outer wall of the reflective cup 302. In this way, a sound-deadening effect can also be achieved.

Specifically, the sound-absorbing structure 60 is connected to the outer wall of the reflector cup 302, and the outer side wall of the sound-absorbing structure 60 (i.e. the side wall of the sound-absorbing structure 60 away from the outer wall of the reflector cup 302) is provided with the micro holes 604, so that when an air flow is generated in the air duct 40, the generated air flow noise can enter the resonant cavity 602 through the micro holes 604, and the air in the resonant cavity 602 vibrates to generate internal friction heat, thereby consuming energy, and further reducing noise. More specifically, in this embodiment, the sound attenuating structure 60 may also be streamlined to reduce wind resistance or to adapt to the shape of the outer wall of the reflector cup 302, according to the shape of the reflector cup 302.

The sound attenuation structure 60 may be integrally connected with the reflector cup 302 or may be separately connected, and is not limited in particular.

In one embodiment, the sound attenuating structure 60 includes a first end and a second end, the second end being closer to the air outlet 404 of the air chute 40 than the first end, the sound attenuating structure 60 having a tapered shape in a direction from the first end to the second end. In this manner, the sound attenuating structure 60 may function to direct the flow of air.

Specifically, in the example shown in fig. 6, the first end is the rear wall 608 of the sound attenuating structure 60, and the second end is the front wall 606 of the sound attenuating structure 60. In the embodiment shown in fig. 6, along the direction from the first end to the second end, i.e. the flowing direction of the air flow, the sound-deadening structure 60 is in a tapered shape, so that the outer diameter of the rear wall 608 is larger than the outer diameter of the front wall 606, it can be realized that the closer to the air outlet 404, the larger the angle at which the wind is dispersed is, and further, the maximum air outlet dispersion at the air outlet 404 is realized, and the drying experience is improved, in particular, for the hair dryer, the hair blowing experience is improved.

In one embodiment, the wind assembly 20 includes a motor 202 positioned within the wind tunnel 40, with the first end having an outer diameter equal to or less than the inner diameter of the motor 202. In this way, the muffling structure 60 can be prevented from blocking the airflow to cause extra noise.

Specifically, in FIG. 6, the motor 202 and the blades 204 are both located in the wind tunnel 40, the sound attenuating structure 60 is located downstream of the blades 204, and the motor 202 is located between the sound attenuating structure 60 and the blades 204. The inner diameter of the motor 202 may refer to the diameter of the rotor of the motor 202. The outer diameter of the first end portion, i.e., the outer diameter of the rear wall 608 of the sound attenuating structure 60, is equal to or less than the inner diameter of the motor 202, so that when the entire sound attenuating structure 60 is placed opposite the motor 202, the sound attenuating structure 60 has substantially no portion protruding outward relative to the motor 202, and thus, when an air flow is generated in the air duct 40, the sound attenuating structure 60 does not block the air flow to cause additional noise.

In one embodiment, the outer circumferential surface of the sound attenuating structure 60 is a curved surface. Thus, the outer peripheral surface of the sound attenuation structure 60 can have a flow guiding effect, so that the wind field of the air outlet 404 of the drying device 100 is more uniform and the wind speed is lower, thereby improving the user experience, for example, when the drying device 100 is a hair dryer, the blowing experience of the user can be improved.

Specifically, the outer peripheral surface of the sound attenuation structure 60 may be the outer peripheral surface of the side wall 610. The outer peripheral surface is a curved surface, and the principle used is the coanda effect, and the air flow flows along the outer peripheral surface of the sound attenuating structure 60. Referring to fig. 12 and 13, fig. 12 shows the wind speed distribution at the outlet when the entire silencer structure is cylindrical, and fig. 13 shows the outer peripheral surface of the silencer structure 60 according to the embodiment of the present invention as an inwardly-contracted curved surface, i.e., a tapered curved surface, in contrast, the low wind speed region (the position indicated by the circle in the drawing) near the outlet 404 in fig. 13 is smaller, so that the middle wind speed is more uniform, and the maximum wind speed is lower. In one example, the maximum wind speed may be made to not exceed 35m/s so that the wind does not have a significant uncomfortable feeling on the head or face.

In one embodiment, the pore size of micropores 604 is selected from the range [0.1mm,2mm ]. In this manner, the influence on the air flow in the air duct 40 is minimized while enhancing the sound-deadening effect by optimizing the pore diameter of the minute pores 604.

Specifically, the pore diameter of the micropores 604 may be 0.1mm, or 0.2mm, or 0.5mm, or 1mm, or 1.2mm, or 1.5mm, or 2mm, or other values from 0.1mm to 2mm, which is not particularly limited herein. Preferably, all of the micro-holes 604 have the same pore size, which facilitates processing. It is understood that micropores 604 at different locations may also be designed to have different pore sizes depending on the distribution of noise.

The aperture of the micropores 604 is within 2mm, and the micropores 604 can increase the flow resistance of the fluid in the pores, so that the acoustic resistance is improved, and the sound attenuation structure 60 has a good sound attenuation effect in a larger sound attenuation bandwidth. Referring to fig. 14 and 15, for a sound-attenuating structure 60 having a given pore size of 2mm for the micropores 604, positive sound absorption coefficients for different frequency bands (fig. 14) and actual test results (fig. 15) were theoretically obtained. As can be seen from fig. 14, the aperture of the corresponding micro-hole 604 can be set by detecting the airflow noise of the air duct 40, so as to achieve better noise elimination effect. As can be seen from fig. 15, the sound-deadening structure 60 having the micropores 604 has a better effect of absorbing high-frequency noise than the sound-deadening structure 60 having no micropores 604. In fig. 15, the dark gray lines represent the sound-attenuating structure with micro-holes, and the light gray lines represent the sound-attenuating structure without micro-holes.

In one embodiment, the porosity of the micropores 604 is selected from the range [ 0.1%, 30% ].

Specifically, the porosity K of the micropores 604 is a ratio of the total area K1 of the micropores 604 to the total area K2 of the outer peripheral surface of the sound attenuation structure 60, that is, K1/K2.

The porosity of micropores 604 may be other values between 0.1%, or 0.5%, or 3%, or 15%, or 20%, or 25%, or 30%, or 0.1% to 30%. The micro-holes 604 may be uniformly distributed, or distributed with a large density at some locations and a small density at some locations, depending on the muffling effect.

In one embodiment, the sidewall 610 wall thickness of the sound attenuating structure 60 is selected from the range [0.1mm,5mm ].

Specifically, the side wall 610 of the sound attenuating structure 60 is the side wall 610 that is the same thickness everywhere, that is, the sound attenuating structure 60 is sectioned using a plane passing through the central axis of the sound attenuating structure 60, and the resulting section of the sound attenuating structure 60 has a thickness measured everywhere along the plane parallel to the side wall 610 of the sound attenuating structure 60 that is the same thickness everywhere. It should be noted that the equal thickness may be the same thickness, or the thickness error may be within a desired range.

The wall thickness of the sidewall 610 of the sound attenuating structure 60 may be 0.1mm, or 0.5mm, or 1mm, or 1.5mm, or 2mm, or 3mm, or 4mm, or 5mm, or other values between 0.1mm and 5 mm.

In one embodiment, referring to fig. 6 and 7, the resonant cavity 602 is hollow. In this way, on the one hand, the respective sound-damping frequency band can be matched, and on the other hand, the weight of the sound-damping structure 60 can also be reduced.

Specifically, the resonant cavity 602 is hollow, without other structural members, and the volume of the resonant cavity 602 is maximized given the profile of the sound attenuating structure 60.

In one embodiment, structural components are provided within the resonant cavity 602 such that the volume of the resonant cavity 602 is sized. Thus, by disposing the structural member in the resonant cavity 602, the space in the resonant cavity 602 is occupied by the structural member, the volume of the resonant cavity 602 is adjusted, and the corresponding muffling frequency band is also adjusted, so that the muffling structure 60 can be adapted to different muffling frequency band requirements in a given muffling structure 60.

Specifically, as the volume within the resonant cavity 602 changes, the resonant frequency of the resonant cavity 602 can be changed. The noise frequency in the air duct 40 is the same as the resonance frequency of the resonance cavity 602, and a good noise elimination effect can be achieved. Thus, in a given drying apparatus 100, when the wind assembly 20 is operating, the noise frequency within the wind tunnel 40 is detected, thereby resulting in a desired resonant frequency of the resonant cavity 602. The volume within the resonant cavity 602 is adjusted such that the resonant frequency of the resonant cavity 602 is the same as the desired resonant frequency.

In one embodiment, referring to fig. 9 and 10, the structural member includes at least one of a porous sound absorbing material, a lattice structure, and a column 624.

In particular, the porous sound absorbing material helps to increase the noise reduction bandwidth. In one example, the porous sound absorbing material may be foam.

The grid structure may be a structure in which longitudinal bars and transverse bars are cross-connected.

The column portion 624 may be a regular shape such as a cylinder, a square column, or an irregular shape. In the embodiment shown in fig. 10, the cylindrical portion 624 has a substantially identical profile to the sound-attenuating structure 60, so that an annular chamber 603 with a uniform circumferential thickness can be formed in the resonant cavity 602, so that the sound-attenuating effect of the sound-attenuating structure 60 is more uniform.

In one embodiment, a groove 626 is cut into the column 624. Thus, the weight reduction and material saving of the silencing structure 60 can be realized, the weight reduction and saving of the drying equipment 100 are further realized, and the user experience and the cost reduction are improved.

Specifically, the weight of the drying apparatus 100 has an influence on transportation, installation, maintenance, use, and the like of the drying apparatus 100, and a weight reduction design of the drying apparatus 100 is also considered while ensuring the noise reduction effect and the product performance. By arranging the groove 626 in the columnar part 624, the drying apparatus 100 can be reduced in weight, reducing adverse effects on transportation, installation, maintenance, use and the like, and improving user experience. Further, for the drying apparatus 100 to be a hand-held apparatus, such as a hair dryer, particularly a cordless hair dryer, the weight reduction means that even if the user uses the drying apparatus 100 for a long time, the user does not feel tired easily, and the user experience is also improved.

The material dug by the grooves 626 can be recycled, for example, to manufacture the pillars 624 or other structures, thereby saving material for the drying apparatus 100 and reducing costs.

In the embodiment shown in fig. 10, the groove 626 opens from the rear wall 608 of the sound attenuating structure 60 within the cylindrical portion 624.

In one embodiment, the cross-section of the resonant cavity 602 after the provision of the cylindrical portion 624 is annular and is equally wide everywhere in the radial direction along the same annular cross-section in a plane perpendicular to the axis of the sound attenuating structure 60. Therefore, the circumferential silencing effect of the silencing structure 60 can be uniform, and the formed annular chamber 603 guides airflow to be circumferential uniform, so that extra noise is avoided.

In one embodiment, the post 624 is removable and one end of the post 624 has a removable port 628 that is secured to the sound attenuating structure 60. Thus, the pillar 624 with different sizes can be replaced, and the volume of the resonant cavity 602 can be adjusted to adapt to different frequencies of noise.

Specifically, the detachable interface 628 may be detachably connected to the sound-deadening structure 60 by a screw connection, a snap connection, an interference fit, or the like, so as to detach the column portion 624. In the embodiment of fig. 10, the rear wall 608 of the sound attenuating structure 60 is formed with a detachable interface 628.

In one embodiment, the entire shaft 624 with the detachable interface 628 is replaceable. When the post 624 is replaced, the detachable interface 628 may also be replaced.

In one embodiment, the detachable interface 628 and the column 624 are detachably connected. When replaced, only the posts 624 are needed, and the detachable interface 628 need not be replaced, i.e., one detachable interface 628 may accommodate multiple posts 624 of different sizes.

In one embodiment, referring to fig. 5 and 16, the outer wall of the sound-damping structure 60 and the inner wall of the air duct 40 surround to form an annular air duct 406, and the drying device 100 includes a flow guide member 70, wherein the flow guide member 70 is configured to guide and reduce the noise of the air flow of at least one of the inner edge 408 and the outer edge 410 of the annular air duct 406. Thus, the noise of the air outlet 404 can be further reduced, and the user experience is improved. For example, for a hair dryer, the user's hair blowing experience may be enhanced.

Specifically, referring to fig. 16 and 17, the inner edge 408 and the outer edge 410 of the annular air duct 406 are located at the air outlet 404, and if the air deflector 70 is not provided, the air flow in the air duct 40 is directly blown out along the right-angled edges of the inner edge 408 and the outer edge 410, which may cause high wind noise. Flow reduction may be achieved by providing a baffle 70 that slows the air flow velocity at least one of the inner edge 408 and the outer edge 410 of the annular air chute 406.

The deflector 70 may deflect and de-noise the air flow at the inner edge 408, or at the outer edge 410, or at both the inner edge 408 and the outer edge 410 of the annular duct 406.

The flow guiding and noise reduction can be understood as that at least one of the flowing direction and the speed of the air flow is changed to realize the noise reduction effect.

In one embodiment, referring to fig. 5, the annular air duct 406 includes an air outlet 404, the sound-damping structure 60 includes a front end surface near the air outlet 404, and the flow-guiding member 70 is fixedly connected to the front end surface. In this way, the fixing of the deflector 70 can be achieved.

Specifically, the front end face may be an end face of the front wall 606 of the sound attenuating structure 60. The baffle member 70 may be removably attached to the front face. In the embodiment shown in fig. 11, the deflector 70 includes a central portion 702 and an outer ring portion 704, the central portion 702 is located in the outer ring portion 704, the central portion 702 is disposed corresponding to the front end surface, and the outer ring portion 704 is disposed opposite to and spaced from the outer edge 410 of the annular air duct 406. The front end face is provided with a central screw hole 630, the central part 702 is provided with a through hole 706, and a stud of the screw 708 penetrates through the through hole 706 and is in threaded connection with the central screw hole 630, so that the flow guide piece 70 is fixed, and concentric fixation is realized. It will be appreciated that in other embodiments, other means of securing may be used, such as, for example, snap-fitting, interference fit, welding, etc. And is not particularly limited herein.

In addition, an end cap 710 may be used to cover the head of the screw 708, which may prevent the user from accidentally detaching, and may also provide an aesthetic appearance.

The central portion 702 is connected to the outer ring portion 704 by a plurality of second connection ribs 712, and the first connection ribs 612 are disposed in one-to-one correspondence with the second connection ribs 712. Therefore, the second connecting ribs 712 do not shield the outgoing airflow too much, and the airflow blown out from the flow guide channel 614 formed by the first connecting ribs 612 can be blown out of the drying device 100 through the space between two adjacent second connecting ribs 712, thereby ensuring the air output. In other embodiments, the number of the second connection ribs 712 may be less than that of the first connection ribs 612, such that the second connection ribs 712 correspond to portions of the first connection ribs 612 one-to-one, and there are some first connection ribs 612 that do not correspond to the second connection ribs 712.

In one embodiment, referring to fig. 17, the end surface 714 of the second connecting rib 712 facing away from the first connecting rib 612 is formed with a curved flow guide surface diverging outwardly. Thus, the wind noise along the second connection rib 712 can be reduced.

Specifically, when the air flow blows from the air duct 40 to the side walls of the second connecting ribs 712, the end surface 714 will flow along the side walls of the second connecting ribs 712, and the end surface 714 is formed with a guiding curved surface that is outwardly diffused, so that the air flow is diffused and blown out, the air speed is reduced, and the guiding and noise reduction are achieved. The arrangement of the guide curved surface can prevent noise caused by air flow blown out from the right-angled edges of the second connecting ribs 712. The axial section shape of the flow guiding curved surface is the shape of a polynomial curve. Specifically, the polynomial curve may have a shape including a parabola, an ellipse, a hyperbola, and the like.

In one embodiment, the deflector 70 includes a deflector surface 716 opposite the annular duct 406, the deflector surface 716 configured to deflect and reduce noise in the air flow at the outer edge 410 of the annular duct 406. In this manner, flow-guiding noise reduction of the outer edge 410 may be achieved.

Specifically, referring to fig. 17, the flow guiding surface 716 is a lower side surface of the outer ring 704, and is spaced from and opposite to an end surface of the annular air duct 406, and the flow guiding surface 716 may extend from inside the annular air duct 406 to outside the annular air duct 406. When the air flow in the annular air duct 406 blows outward against the wall of the air duct 40 through the outer edge 410, the air flow encounters the flow guide surface 716, and the flow direction and speed of the air flow are changed by the flow guide surface 716, so that the air flow at the outer edge 410 of the annular air duct 406 is guided and reduced in noise.

In one embodiment, referring to fig. 18, the guiding surface 716 is a slope inclined in the direction from the inside to the outside of the annular air duct 406.

It is understood that the deflector surface 716 may include one, two, three, four, or more inclined surfaces, which are not enumerated herein. The angle of inclination may be a predetermined angle, which may be 30 °, 40 °, 45 °, 55 °, 60 °, 50 °, 75 °, 80 °, 90 °, 100 °, 120 °, or more, not to mention here. Wherein the predetermined angle refers to an angle between the inclined surface and a flow direction of the airflow in the annular air duct 406. Thus, the inclined plane can guide the airflow to a desired position, such as the hot spot area 306 (see fig. 11) of the heat generating source 30, and the heat of the hot spot area 306 can be dissipated while reducing noise, so that the temperature of the hot spot area 306 is not too high easily when the drying device 100 works, and the safety of the drying device 100 in use is improved. In one embodiment, the hot spot region 306 may be the region enclosed by the opening of the reflector cup 302. It is understood that in other embodiments, the hot spot region 306 may be positioned according to where the heat generating source 30 needs to dissipate heat, subject to the ability of the flow guide 70 to direct the airflow toward the hot spot region 306.

In the embodiment shown in fig. 18, the drying device 100 may further include an optical element 80 disposed at the opening of the reflector cup 302, the optical element 80 may be used for filtering or reflecting the visible light emitted from the light-emitting member, and at least a portion of the hot spot region 306 may be formed on the optical element 80.

In one embodiment, referring to fig. 19, the flow guiding surface 716 includes a plurality of sub-inclined surfaces 718, the sub-inclined surface 718 closest to the annular air duct 406 extends along the flow direction of the air flow in the annular air duct 406; the angle of inclination of the sub-ramp 718 furthest from the annular air chute 406 is less than the angle of inclination of the sub-ramp 718 closest to the annular air chute 406. In this way, the guiding surface 716 can better guide part of the air flow in the annular air duct 406 to the hot spot region 306, and the air flow is smoother when flowing on the guiding surface 716.

Specifically, the flow guide surface 716 may include two, three, four, five, or more sub-inclined surfaces 718, a plurality of sub-inclined surfaces 718 may be connected end to form the flow guide surface 716, and a portion of the airflow in the annular air duct 406 may sequentially flow from the sub-inclined surface 718 closest to the annular air duct 406 to the sub-inclined surface 718 farthest from the annular air duct 406. It should be noted that the inclined angle refers to an angle between the sub-inclined plane 718 and the flow direction of the airflow in the annular air duct 406. The sub-inclined plane 718 closest to the annular air duct 406 is defined as a first sub-inclined plane 720, the sub-inclined plane 718 farthest from the annular air duct 406 is defined as a second sub-inclined plane 722, an inclination angle of the first sub-inclined plane 720 is α 1, an inclination angle of the second sub-inclined plane 722 is defined as α 2, and an inclination angle of any one sub-inclined plane 718 between the first sub-inclined plane 720 and the second sub-inclined plane 722 may be between α 1 and α 2, or may be greater than α 2, or smaller than α 1, which is not limited herein. In one embodiment, the inclination angles of the sub-inclined surfaces 718 gradually decrease from the first sub-inclined surface 720 to the second sub-inclined surface 722, so that the airflow is smoother and less prone to generate backflow in the process of flowing from the first sub-inclined surface 720 to the second sub-inclined surface 722.

Of course, in other embodiments, the inclination angle of the first sub-slope 720 may be larger than that of the second sub-slope 722, or the inclination angle of the first sub-slope 720 may be equal to that of the second sub-slope 722, which is not limited herein.

In one embodiment, referring to fig. 17, the flow guiding surface 716 is a curved surface that is convex and extends away from the annular duct 406 along the flow direction of the airflow in the annular duct 406. Therefore, the guiding surface 716 can guide more air flow and more smoothly to reduce noise and guide the air flow to the hot spot region 306, so as to further improve the noise reduction effect on the air flow and the cooling effect on the hot spot region 306.

Specifically, the end of the flow guiding surface 716 may face downward or may face the hot spot region 306, so that the airflow may flow along the flow guiding surface 716 to the hot spot region 306, and a tangential plane of an end of the flow guiding surface 716 away from the annular air duct 406 may be parallel to or form an included angle with an end surface of the hot spot region 306. In one example, from the annular air duct 406 to the hot spot region 306, an angle between a tangent of each point of the flow guide surface 716 and an end surface of the hot spot region 306 gradually decreases, or an angle between a tangent of each point of the flow guide surface 716 and an end surface of the hot spot region 306 gradually decreases to zero and then gradually increases.

In one embodiment, the curved surface comprises a plurality of sub-curved surfaces connected in series, at least one sub-curved surface extending exponentially. Thus, the exponentially extending sub-curved surfaces can have better guiding effect, so that the airflow can flow to the hot spot region 306 more accurately and smoothly.

Specifically, the number of the sub-curved surfaces extending in an exponential manner may be one, two, three, four or more, which is not listed here. For example, in one embodiment, the plurality of sub-surfaces each extend exponentially. For another example, the sub-curved surface closest to the annular air duct 406 extends exponentially to guide the air flow in the annular air duct 406 to the outside more smoothly. Alternatively, the plurality of sub-curves proximate the annular duct 406 may extend exponentially. The sub-curved surface is extended exponentially, and specifically, the contour line of the sub-curved surface is extended exponentially, such as a quadratic function curve, a cubic function curve, a quartic function curve, and a quintic function curve, for example, a parabola. The direction of the exponential extension may extend toward the hot spot region 306, or may extend away from the hot spot region 306, which is not limited herein.

In one embodiment, referring to fig. 17 and 20, the flow guiding surface 716 includes a first sub-curved surface 724, a second sub-curved surface 726 and a sub-plane 728 connected in sequence, the first sub-curved surface 724 is located inside the annular air duct 406 and is used for dividing the air flow inside the annular air duct 406 into the outer edge 410 of the annular air duct 406, the second sub-curved surface 726 extends towards the outside of the annular air duct 406 and is used for guiding the air flow flowing into the outer edge 410 of the annular air duct 406 to a preset position, and the sub-plane 728 is parallel to the outer surface of the preset position or is inclined towards the direction of the preset position.

Specifically, the first sub-curved surface 724 may have a circular arc, the circular arc may be located in the annular air duct 406, one end of the circular arc may extend along the flow direction of the air flow in the annular air duct 406, and the other end of the circular arc may extend toward a predetermined position, such as the hot spot region 306, so that the air flow in the annular air duct 406 may generate a split flow when reaching the first sub-curved surface 724, and a part of the air flow may flow from the second sub-curved surface 726. Of course, the contour of the first sub-curved surface 724 is not limited to a circular arc, and may be a curve with a relatively small curvature, such as an ellipse or a drop-shaped front edge, which is not listed here.

The second sub-curved surface 726 may extend toward a predetermined position, such as the hot spot region 306, and the second sub-curved surface 726 may be used to guide the airflow flowing into the outer edge 410 of the annular duct 406 to the hot spot region 306, so that the airflow may flow to the hot spot region 306. Specifically, the contour of the second sub-curved surface 726 may end toward the hot spot region 306, or may end in a direction opposite to the direction of the airflow in the annular air duct 406, so that the airflow may flow toward the hot spot region 306 when flowing out of the second sub-curved surface 726. Further, the second sub-curved surface 726 may extend exponentially to provide better directionality of airflow exiting the second sub-curved surface 726.

The sub-plane 728 is connected to the second sub-curved surface 726, the airflow flows from the second sub-curved surface 726 to the sub-plane 728, and the sub-plane 728 is parallel to an outer surface of a predetermined position, such as an end surface of the hot spot area 306, or is inclined toward the end surface of the hot spot area 306, so that after the airflow flows through the sub-plane 728, the sub-plane 728 can guide the airflow, and more airflow can flow to the hot spot area 306. In the example shown in fig. 20, the sub-plane 728 is parallel to the end surface of the hot spot area 306, so that the airflow flowing out of the sub-plane 728 does not collide with the hot spot area 306, and the airflow can smoothly pass through the end surface of the hot spot area 306, and the heat of the hot spot area 306 is more removed. The length ratio of the sub-plane 728 and the second sub-curved surface 726 can be controlled to control the guiding direction of the airflow, so that the airflow can flow to the hot spot region 306 more smoothly, smoothly and accurately.

In one embodiment, the angle between the tangent to the extension direction of each point of the second sub-curved surface 726 and the outer surface of the predetermined position gradually decreases along the flow direction of the airflow on the outer edge 410 of the annular air duct 406.

Specifically, along the guiding direction of the guiding surface 716, if the included angle between the tangent line of each point of the second sub-curved surface 726 and the outer surface of the preset position, such as the end surface of the hot spot region 306, is gradually decreased, the second sub-curved surface 726 gradually extends toward the direction parallel to the end surface of the hot spot region 306, so that the included angle between the flow direction of the airflow and the end surface of the hot spot region 306 when the airflow flows out from the second sub-curved surface 726 is smaller, the airflow is not likely to generate a larger impact with the hot spot region 306, and further, more heat of the hot spot region 306 can be taken away.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. Drying apparatus, characterized in that it comprises:

the air duct is arranged in the shell;

and the power supply is electrically connected with the wind power assembly.

2. Drying apparatus according to claim 1 in which the wind assembly comprises a blade located in the wind tunnel, the sound attenuating structure being located downstream of the blade.

3. Drying apparatus according to claim 1 in which the wind assembly comprises a blade located in the wind tunnel, the sound attenuating structure being located coaxially with the blade.

4. Drying apparatus according to claim 1 in which the muffling structure is located on the axis of the air duct.

5. Drying apparatus according to any one of claims 1 to 4 in which the muffling structure is located adjacent to the outlet of the air duct.

6. The drying apparatus according to claim 1, characterized in that the drying apparatus includes a heat generating source housed in the casing and adapted to generate heat and direct the heat outside the casing.

7. The drying apparatus according to claim 6, wherein the heat generation source is located between the air duct and the casing, and the sound attenuation structure connects at least one of the air duct inner wall, the casing, and the heat generation source.

8. The drying apparatus according to claim 7, wherein the sound-deadening structure connects at least one of the air duct inner wall, the casing, and the heat generation source by a plurality of first connecting ribs that connect side walls of the sound-deadening structure along a circumferential direction of the sound-deadening structure, and a flow guide passage is formed between adjacent two first connecting ribs.

9. The drying apparatus according to claim 6, wherein the sound-deadening structure is connected to the air duct inner wall by a plurality of first connecting ribs, and the air duct outer wall is provided with a mounting portion.

10. The drying apparatus of claim 9, wherein the mounting portion defines a threaded hole.

11. The drying apparatus according to claim 9, wherein the mounting portion is provided with a mounting post, the heat source includes a reflective cup, the outer wall of the reflective cup is provided with a convex portion, the convex portion is provided with a mounting hole, and the mounting post penetrates through the mounting hole.

12. The drying apparatus of claim 6, wherein the heat generating source is surrounded by the air duct, the heat generating source includes a reflective cup, and the sound attenuating structure is attached to an outer wall of the reflective cup.

13. Drying apparatus according to claim 1, wherein the sound-attenuating structure comprises a first end and a second end, the second end being closer to the air outlet of the air duct than the first end, the sound-attenuating structure being tapered in a direction from the first end to the second end.

14. Drying apparatus according to claim 13 in which the wind assembly comprises a motor located within the air duct, the first end portion having an outer diameter equal to or less than the inner diameter of the motor.

15. The drying apparatus according to claim 1, wherein an outer peripheral surface of the sound-deadening structure is a curved surface.

16. Drying apparatus according to claim 1, wherein the pore size of the micropores is selected from the range [0.1mm,2mm ].

17. Drying apparatus according to claim 1, wherein the porosity of the micropores is selected from the range [ 0.1%, 30% ].

18. The drying apparatus of claim 1, wherein the wall thickness of the side wall of the muffling structure is selected from the range [0.1mm,5mm ].

19. Drying apparatus according to claim 1 in which the resonant cavity is hollow.

20. The drying apparatus of claim 1, wherein a structural member is provided within the resonant cavity such that the volume of the resonant cavity is sized.

21. The drying apparatus of claim 20, wherein the structural member includes at least one of a porous sound absorbing material, a grid structure, and a pillar.

22. Drying apparatus according to claim 21 in which the cylindrical portion has a recess formed therein.

23. Drying apparatus according to claim 21, in which the cross-section of the resonance chamber after the provision of the cylindrical portion is annular and is of equal width everywhere in the radial direction along the same annular cross-section in a plane perpendicular to the axis of the sound-attenuating structure.

24. Drying apparatus according to claim 21 in which the post is removable and has a removable socket at one end to which the silencing structure is secured.

25. Drying apparatus according to claim 24 in which the entire column with the detachable interface is replaceable or the detachable interface and the column are detachably connected.

26. The drying apparatus according to claim 1, wherein an annular air duct is formed by surrounding an outer wall of the sound attenuation structure and an inner wall of the air duct, the drying apparatus comprising:

a deflector configured to deflect and de-noise airflow of at least one of an inner edge and an outer edge of the annular duct.

27. The drying apparatus of claim 26, wherein the annular air duct includes an air outlet, the sound attenuating structure includes a front face adjacent to the air outlet, and the flow guide is fixedly connected to the front face.

28. The drying apparatus of claim 27, wherein the deflector includes a central portion and an outer annular portion, the central portion being located in the outer annular portion, the central portion being disposed in correspondence with the front end face, the outer annular portion being spaced opposite the outer edge of the annular duct.

29. The drying apparatus of claim 28, wherein the muffling structure is connected to the inner wall of the air duct by a plurality of first connecting ribs, the central portion is connected to the outer ring portion by a plurality of second connecting ribs, and the first connecting ribs are provided in one-to-one correspondence with the second connecting ribs.

30. Drying apparatus according to claim 29, characterised in that the end faces of the second connecting ribs facing away from the first connecting ribs are formed with outwardly diverging flow-guiding curved surfaces.

31. The drying apparatus of claim 28, wherein the deflector includes a deflector surface opposite the annular duct for deflecting and de-noising the air flow at the outer edge of the annular duct.

32. The drying apparatus of claim 31, wherein the deflector surface is a sloped surface that slopes in an inward-outward direction of the annular duct.

33. The drying apparatus of claim 31, wherein the deflector surface comprises a plurality of sub-ramps, the sub-ramp closest to the annular duct extending in the direction of flow of the airflow within the annular duct; the inclination angle of the sub-inclined plane farthest from the annular air duct is smaller than the inclination angle of the sub-inclined plane closest to the annular air duct.

34. The drying apparatus of claim 31, wherein the deflector surface is curved and is convex in a direction away from the annular duct along the direction of flow of the air flow within the annular duct.

35. Drying apparatus according to claim 34 in which the curved surface comprises a plurality of sub-curved surfaces connected in series, at least one of the sub-curved surfaces extending exponentially.

36. The drying apparatus according to claim 31, wherein the flow guide surface comprises a first sub-curved surface, a second sub-curved surface and a sub-plane, which are connected in sequence, the first sub-curved surface is located in the annular air duct and is used for dividing the air flow in the annular air duct into the outer edge of the annular air duct, the second sub-curved surface extends towards the outside of the annular air duct and is used for guiding the air flow flowing into the outer edge of the annular air duct to a preset position, and the sub-plane is parallel to the outer surface of the preset position or is inclined towards the direction of the preset position.

37. Drying apparatus according to claim 36 in which the angle between the tangent to the direction of extension of each point of the second sub-curve and the outer surface of the predetermined location decreases in the direction of flow of the airflow over the outer edge of the annular duct.

38. Drying apparatus according to claim 6, wherein the heat generating source is a source of infrared radiation.

39. Drying apparatus according to claim 6, wherein the heat generating source is surrounded by the air duct or is located between the air duct and the housing.

40. Drying apparatus according to claim 1 in which the housing comprises a body and a handle, the wind assembly being provided within the body or the handle.

41. The drying apparatus of claim 1, wherein the housing includes a body and a handle, the power source is disposed in the handle, an auxiliary air duct is formed between an outer wall of the power source and an inner wall of the handle, and the auxiliary air duct communicates with the air duct.