WO2021230480A1 - 헤어드라이어 - Google Patents
헤어드라이어 Download PDFInfo
- Publication number
- WO2021230480A1 WO2021230480A1 PCT/KR2021/003022 KR2021003022W WO2021230480A1 WO 2021230480 A1 WO2021230480 A1 WO 2021230480A1 KR 2021003022 W KR2021003022 W KR 2021003022W WO 2021230480 A1 WO2021230480 A1 WO 2021230480A1
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- WO
- WIPO (PCT)
- Prior art keywords
- guide
- hub
- hair dryer
- length
- impeller
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 26
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 15
- 230000002093 peripheral effect Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 206010019049 Hair texture abnormal Diseases 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
- A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/121—Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features
Definitions
- the present invention relates to a hair dryer, and relates to a hair dryer in which air introduced into an inlet is discharged toward an outlet, and can dry or tidy hair using the discharged air.
- a hair dryer can be used to dry wet hair or to fix and style the hair to keep it in a certain shape. In addition, it can be used to tidy up the hair.
- a high-speed rotating motor and a blowing fan coupled thereto are required, and wind is generated according to the air flow generated by the blowing fan, and the generated wind can be used to dry hair or style hair.
- Hair dryer noise is mainly caused by two factors. First, noise is generated due to air blown generated by the friction of the air moving rapidly by the blower fan with the inner wall of the hair dryer body and accessories. Second, when the motor rotor rotates at high speed, the physical and electromagnetic vibrations generated are transmitted to the hair dryer body to generate noise.
- turbulence is formed when noise is generated, which is not expected in the hair dryer design process. Even if it is an expected problem, it is desirable to suppress the occurrence of such turbulence. When turbulence is formed, there is a problem in that the efficiency of the motor is reduced and unnecessary power is consumed.
- Noise generated for the first reason can be suppressed by appropriately changing the structure or arrangement of the hair dryer body and accessories.
- Korean Patent No. 10-1407404 discloses an invention for reducing noise generated during operation of the hair dryer by inserting a suction grill located at an air inlet portion of the hair dryer with a smaller one than the conventional one.
- Korean Patent Laid-Open Publication No. 10-2016-0096330 discloses an invention for a hair dryer to solve a noise problem caused by amplifying the vibration of a motor into sound.
- a transmission that can increase the rotation speed of the motor and transmit it to the blower fan is used.
- the transmission motor is driven at a relatively low rotational speed, the blower fan connected thereto can be rotated at a high speed, thus solving the noise problem without lowering the wind speed.
- the inventions for solving the existing noise problem cannot fundamentally solve the noise generation because they do not remove the air flow that generates the noise by using a structural arrangement or shape.
- the present disclosure aims to solve the problem of increasing the efficiency of the hair dryer by minimizing the loss occurring in the blade.
- An object of the present disclosure is to provide a hair dryer with high efficiency by appropriately modifying the structure and shape of the wing portion of the impeller.
- An object of the present disclosure is to provide a hair dryer with high efficiency by appropriately modifying the structure and shape of the wing portion of the vane.
- An object of the present disclosure is to provide a hair dryer with high efficiency by appropriately adjusting the diameter of the hub of the impeller or the vane and the length of each chord of the wing.
- An object of the present disclosure is to increase the efficiency of a fan motor flow path by minimizing a loss in the flow of air entering an air flow unit.
- An object of the present disclosure is to provide a hair dryer capable of efficiently using an internal space by stabilizing the flow of air entering a fan motor without adding a configuration.
- An object of the present disclosure is to provide a hair dryer capable of minimizing the loss occurring in the blade and reducing noise generation by modifying the structure and shape of the internal components of the air flow unit.
- the present disclosure can reduce the blade loss by adjusting the diameter and the number and length of the blades of the impeller in order to solve the above problems.
- the present disclosure can reduce the blade loss by adjusting the diameter and the number and length of the blades in the guide in order to solve the above problems.
- Blade loss can be minimized by appropriately adjusting the value obtained by dividing C (chord length) by S (space).
- C means the length of the chord of the blade
- S means the value obtained by dividing the circumference length by the number of blades. That is, the length of the blade chord may be determined according to the number of blades.
- the diameter of the impeller can be determined according to the diameter of the fan motor, and the diameter of the impeller hub can be determined according to the diameter of the motor.
- the efficiency is highest when the C/S has a value of 1.4 to 1.5, and in the case of the guide part, the efficiency is the highest when the C/S has a value between 1.5 and 2.0.
- the present disclosure provides a body part having a discharge part through which air is discharged on one side, a handle part extending from one side of the body part, and an inlet part communicating with the discharge part to introduce outside air, the main body A heater provided inside the unit to heat the air introduced into the inlet and an air flow unit disposed in either the main body or the handle to move the air introduced into the inlet to the outlet, the air
- the flow unit forms an exterior and includes a case having a suction part on one side and a discharge part on the other side, a stator fixed inside the case to generate a rotating magnetic field, and a rotor accommodated in the stator and rotated by the rotating magnetic field
- a rotating shaft extending or coupled from the rotor toward the suction unit or the discharge unit includes an impeller coupled to one end of the rotating shaft adjacent to the suction unit, rotating with the rotating shaft, and sucking air in the atmosphere, the impeller includes a hub coupled to the rotational shaft and one or more wing portions protruding
- the second demonstration length which is a linear distance between the axial end of the first free part and the other end of the rotation shaft, is 1.4 times the second circumferential length, which is a value obtained by dividing the circumferential length of a circle having the same diameter as the diameter of the impeller by the number of the wing parts. It may be larger and smaller than 1.5 times the second circumferential length.
- the hair dryer may further include a guide part coupled to the outer peripheral surface of the stator for guiding the air sucked by the impeller toward the discharge part.
- the guide part may include a guide hub coupled to the stator and a plurality of guide wing parts protruding from the guide hub toward the inner circumferential surface of the case to guide the air sucked in by the impeller in the direction of the discharge part.
- the number of the wing parts may be greater than or equal to the number of the guide wing parts.
- the guide wing portion includes a second fixing portion contacting the guide hub, a second free portion forming a free end adjacent to the case direction, and a second body portion connecting the second fixing portion and the second free portion, and ,
- the third demonstration length which is a linear distance between the axial end of the second fixing part and the other end of the rotation shaft, is greater than 1.5 times the third circumferential length, which is a value obtained by dividing the circumferential length of the guide hub by the number of guide wing parts, and is greater than the first It may be provided to be smaller than twice the length of the three circumferences.
- the third demonstration length may be greater than or equal to the first demonstration length.
- the third circumferential length may be greater than or equal to the first circumferential length.
- the fourth arbitration length which is a linear distance between the axial end and the other end of the second free part in the axial direction of the rotation shaft, is a value obtained by dividing the circumferential length of a circle having the same diameter as the diameter of the guide part by the number of the guide wing parts 1.5 of the fourth circumferential length It may be larger than twice and smaller than twice the fourth circumferential length.
- a diameter of the guide hub may be greater than or equal to a diameter of the hub portion.
- the wing portion may be provided to be inclined with respect to the axial direction of the rotation shaft, and the guide blade portion may be provided to be inclined in the opposite direction to the wing portion with respect to the axial direction of the rotation shaft.
- the hub part may include a hub body from which the wing part protrudes and a hub cap extending from one surface of the hub body adjacent to the suction part toward the suction part, and the hub cap may have a reduced cross-sectional area in an extending direction.
- the hub cap may include a first surface forming a free end and a second surface connecting the first surface and the hub body, and a diameter of the first surface may be smaller than a diameter of the hub body.
- the second surface may be convex toward the suction part.
- the first surface may be disposed inside the case.
- the guide hub includes a guide hub body from which the guide blades protrude, and a guide hub cap extending from one surface of the guide hub body adjacent to the impeller toward the impeller, and the guide hub cap has a reduced cross-sectional area along the extension direction.
- the guide hub cap may include a third surface forming a free end and a fourth surface connecting the third surface and the guide hub body, the diameter of the third surface being smaller than the diameter of the guide hub body.
- a diameter of the third surface may be greater than or equal to a diameter of the hub part.
- a diameter of the guide hub may be greater than or equal to a diameter of the hub portion.
- the air flow unit may be provided in the handle portion and positioned between the inlet portion and the main body portion.
- the present disclosure has an effect of providing a hair dryer capable of reducing noise generated by air flow by using the correlation between the number of blades of the impeller and the vane and the length of the chord.
- the present disclosure has the effect of providing a hair dryer capable of achieving flow stabilization and reducing flow loss by changing the structure and shape of an existing configuration without adding other configurations.
- the present disclosure has the effect of providing a hair dryer capable of preventing noise by lowering the flow loss of the air flow unit.
- the present disclosure has the effect of providing a hair dryer capable of improving stability and efficiency while reducing noise by appropriately adjusting the shape and relative length of the existing configuration without adding a configuration.
- the present disclosure has the effect of providing a hair dryer capable of minimizing losses that may occur in the impeller and the vane.
- FIG. 1 is a perspective view showing a hair dryer according to an embodiment of the present disclosure.
- FIG. 2 is an internal cross-sectional view of a hair dryer according to an embodiment of the present disclosure.
- FIG 3 is a cross-sectional view of an air flow unit according to an embodiment of the present disclosure.
- FIG. 4 is an exploded perspective view of an air flow unit according to an embodiment of the present disclosure.
- FIG. 5 is a perspective view of an impeller according to an embodiment of the present disclosure.
- FIG. 6 is a perspective view of a guide unit according to an embodiment of the present disclosure.
- FIG. 7 is an exploded perspective view of an impeller and a guide part according to an embodiment of the present disclosure.
- FIG. 8 is a graph schematically illustrating experimental data according to an embodiment of the present disclosure.
- 'and/or' includes a combination of a plurality of listed items or any of a plurality of listed items.
- 'A or B' may include 'A', 'B', or 'both A and B'.
- FIG. 1 is a perspective view of a hair dryer according to an embodiment of the present disclosure
- FIG. 2 is a cross-sectional view showing the inside of the hair dryer according to an embodiment of the present disclosure.
- the hair dryer according to an embodiment of the present invention includes a body portion 100 and a handle portion 300 as shown in FIGS. 1 and 2 .
- the body part 100 may be provided in a cylindrical shape. However, the present invention is not limited thereto and may be formed in various shapes.
- the main body 100 may have a discharge unit 200 through which air is discharged on one surface. Air flowing inside the main body 100 is introduced through the inlet 310 , and the inlet 310 may be provided in the main body 100 or the handle 300 .
- a flow path through which air can flow may be formed in the handle 300 .
- it may be provided to communicate from the inlet part 310 formed in the handle part 300 to the discharge part 200 formed in the body part 100 .
- the handle part 300 may be formed to extend from one side of the body part 100 .
- the handle portion 300 may be formed to extend from all surfaces of the body portion 100 except for the portion where the discharge portion 200 is formed.
- the handle portion 300 may extend in a direction close to perpendicular to the surface on which the discharge part 200 is formed.
- the handle portion 300 is formed such that the discharge portion 200 of the body portion 100 faces the direction in which the knuckles face when the user grips the handle portion 300 . do.
- the present invention is not limited thereto, and the handle unit 300 may be formed to extend from a surface facing the discharge unit 200 .
- the handle part 300 extending downward from the main body part 100 is shown.
- the handle part 300 may be a part held by a user's hand, and thus may have a shape to improve grip convenience.
- the extending direction of the handle part 300 may be various, but for convenience of description below, the extending direction of the handle part 300 from the main body part 100 will be described below.
- An inlet 310 through which external air flows into the hair dryer may be formed below the handle 300 .
- the inlet portion 310 may be formed from the lower side of the handle portion 300 toward the outer peripheral surface, but is not limited thereto, and may be formed in various ways, such as formed toward the lower side of the handle portion 300 .
- the inlet 310 may be formed in a shape having a plurality of through holes through which outside air may be introduced.
- the inside of the hair dryer may include an air flow unit 600 for generating an air flow inside the hair dryer by sucking outside air.
- the air flow unit 600 may be disposed inside the body part 100 or the handle part 300 .
- the invention will be described based on the air flow unit 600 being disposed on the handle portion 300 .
- a heater 500 capable of adjusting the temperature of the air discharged to the discharge unit 200 according to the air flow generated by the air flow unit 600 may be provided inside the body unit 100 .
- FIG. 2 schematically shows the heater 500 provided in the body part 100 .
- the heater 500 may be a method of heating a gas by generating heat by providing a current to a coil-shaped resistor.
- the present invention is not limited thereto, and a configuration for heating a gas such as using a thermoelectric element may be adopted.
- the heater 500 may be disposed at various positions inside the main body 100 . However, as the distance between the discharge unit 200 and the heater 500 increases, the possibility that the gas discharged from the discharge unit 200 is cooled before reaching the user and cannot be used as intended for use increases.
- the heater 500 is preferably disposed inside the main body 100 adjacent to the discharge unit 200 .
- the present invention is not limited thereto, and as long as the temperature of the gas discharged from the discharge unit 200 can be appropriately adjusted, it may be disposed in another portion of the body unit 100 .
- the user operates the power button disposed on the main body part 100 or the handle part 300 .
- the air flow unit 600 is operated and external air is introduced into the hair dryer through the inlet 310 .
- the air introduced through the inlet 310 flows along the inner space of the handle 300 by the air flow unit 600 toward the discharge unit 200, and in the discharge unit 200 Air is discharged and provided to the user.
- the user can dry wet hair using the discharged air, or fix and style the hair to maintain a specific shape. It can also be used to straighten hair.
- the flow rate of the air on the handle part 300 and the body part 100 may be controlled by the air flow unit 600 , and the temperature may be controlled by the heater 500 .
- the operation state control of the air flow unit 600 and the heater 500 may be performed by a user operating the operation unit, or may be automatically performed according to an operation mode preset in the control unit.
- An embodiment of the present invention may include an operation mode that can improve the user's operation convenience or the utility of the hair dryer.
- the manipulation unit may be provided so that a user can use the hair dryer by selecting a desired driving mode, and the manipulation unit may be provided in various types and shapes.
- the operation unit may include a plurality of buttons or a rotary dial to select an operation mode, and may further include additional buttons or selection means.
- manipulation unit may be provided on the body unit 100 or provided on the handle unit 300 and provided to the user, and a plurality of buttons or operating means are provided on the body unit 100 and the handle unit 300 . It may be distributed in
- control unit may be signally connected to a temperature sensor built into the hair dryer.
- the control unit may be installed in various positions as needed, and the control unit may be disposed on a PCB installed adjacent to the rear surface of the body unit 100 .
- control unit may determine the current driving mode through the manipulation unit operated by the user.
- the control unit may receive a set value manipulated by the user to control the driving state of the heater 500 and the air flow unit 600 .
- the heater 500 may be operated with a temperature value set by the controller.
- first, second, and third temperatures are pre-stored in the controller, such as 28°C, 40°C, 60°C, and 90°C, and the heater 500 is configured to select one of the first, second, third, and fourth temperatures. It may be provided so that any one of them can be selected.
- control unit may be electrically and signally connected to the operation unit, the heater 500 and the air flow unit 600 .
- the control unit may receive a signal from the operation unit and control the heater 500 and the air flow unit 600 according to the temperature and speed of the discharge air.
- the discharge part 200 provided in the body part 100 is shown.
- the body part 100 may have a substantially circular cross-section and a length.
- the cross-sectional shape of the body part 100 may vary as needed.
- FIGS. 1 and 2 show the shape of the body part 100 having a circular cross-section and a length.
- the main body 100 has a length extending forward and backward as shown in FIG. 1 , and a cross-section will be described based on a substantially circular shape.
- the open side of the main body 100 may be in various positions, but may correspond to the front side as shown in FIG. 2 , and the discharge unit 200 may cover the front side of the main body 100 as shown in FIG. 2 . It may be provided so as to partially shield the open side while forming.
- 3 and 4 show a combined cross-sectional view and an exploded perspective view of the air flow unit.
- the air flow unit 600 discharges the suction unit 601 into which the external air introduced into the inlet 310 is sucked and the air to the outside of the air flow unit 600 to the outside of the hair dryer. It may include a case 610 including the discharge unit 602 to guide the discharge unit 200 of the. The case 610 forms the exterior of the air flow unit 600 and includes other components for generating air flow therein.
- the inside of the case 610 includes a stator 621 fixed inside the case 610 to generate a rotating magnetic field, and a rotor 622 accommodated in the stator 621 and rotated by the rotating magnetic field. It may include a driving unit 620 that In addition, the rotor 622 may include a rotating shaft extending or coupled to the suction unit 601 or the discharge unit 602 direction.
- the rotation shaft 630 rotates together according to the rotation of the stator 621 , and may transmit a rotational force to a configuration coupled to one end of the rotation shaft 630 .
- the driving unit 620 and the rotating shaft 630 may be provided as one module, and a generally used motor may be used.
- An impeller 640 generating an air flow may be coupled to one end of the rotation shaft 630 in the direction of the suction unit 601 .
- the impeller 640 rotates together with the rotation shaft 630 to suck air into the suction unit 601 and generate an air flow for discharging the suctioned air toward the discharge unit 602 .
- the impeller 640 may have a through hole formed in its center so that the rotation shaft 630 may be press-fitted or coupled to the rotation shaft in a different manner.
- the impeller 640 may include a hub portion 641 that is coupled to the rotation shaft 630 and forms a central portion, and a wing portion 642 that generates air flow according to rotation.
- the hub part 641 may be provided in a cylindrical shape, but is not limited thereto, and may be formed in another manner as long as it has a shape that can be coupled to the rotation shaft 630 .
- a wing portion 642 protruding in a radial direction from the outer circumferential surface of the hub portion 641 may be formed.
- the wing portion 642 may be formed in various numbers. It is preferable that the hair dryer be provided in sufficient number to generate sufficient air flow for use.
- the wing portion 642 may be formed in various shapes.
- the wing portion 642 may have a portion connected to the hub portion 641 and a free end inclination different from each other. It may be provided to generate sufficient air flow while improving the coupling stability of the wing portion 642 . It is preferable that the length of one end of the wing portion 642 coupled to the hub portion 641 is shorter than the length of the free end.
- the present invention is not limited thereto and may be provided in various shapes.
- the hub part 641 may include a hub body 6411, which is a portion from which the wing part 642 protrudes, and the hub cap 6412 extending to the side of the suction part 601 of the hub body 6411. have.
- the extended means is integrally formed and includes being coupled as a separate component from the extended one. That is, the hub cap 6412 is integrally formed with the hub body 6411 on one surface of the hub body 6411 and may extend in the direction of the suction unit 601 , and is separate from the hub body 6411 . may be coupled to shield one side of the hub body 6411 in the direction of the suction part 601 .
- the hub cap 6412 is installed on the front of the hub part 641 of the impeller 640 to protect the internal structure of the axial fan because the driving part 620 and the impeller 640 are connected to the same rotation shaft 630 . can be At the same time, it can serve to reduce uneven inlet flow. In general, the performance of the axial fan may be greatly changed by the hub cap 6412 .
- the axial fan means a fan that generates flow in the longitudinal direction of the rotating shaft.
- the shape of the hub cap 6412 may serve to improve the efficiency and stability of the impeller 640 and solve the noise generation problem by controlling the flow of air sucked in from the suction unit 601 .
- the detailed structure and effect of the hubcap 6412 will be described below.
- 650 may be provided.
- the air introduced by the impeller 640 has a strong circumferential speed due to the rotation of the impeller 640 .
- the guide portion 650 may be included to eliminate circumferential velocity and enhance axial velocity.
- the axial speed refers to a speed from the suction unit 601 to the discharge unit 602 of the case 610 .
- the guide part 650 may be coupled to an outer circumferential surface of the stator 621 forming the driving part 620 to guide air flowing inside the case 610 .
- the present invention is not limited thereto and may be fixed to the inner circumferential surface of the case 610 if it can serve to guide the air flow.
- the guide part 650 may serve to support the driving part 620 inside the case 610 by accommodating the stator 621 , the rotor 622 , and the rotation shaft 630 . .
- the guide part 650 is a guide hub 651 that forms a body at the center and forms a space for accommodating the stator 621, and protrudes from the outer periphery of the guide hub 651, and the air inside the case 610 may include a guide wing portion 652 for guiding from the suction unit 601 to the discharge unit 602 .
- the guide wing portion 652 may be provided in plurality, and may be provided in an appropriate number in a line that does not obstruct the air flow while sufficiently guiding the air inside the case 610 .
- the guide wing portion 652 may be provided in parallel with the axial direction of the rotation shaft 630 .
- the present invention is not limited thereto, and may be provided to be inclined in the axial direction of the rotation shaft 630 and may be provided to have a curvature in the inclined direction.
- the guide wing portion 652 is provided with a curved surface, it is possible to obtain an effect of stabilizing the flow by gently guiding the air flow.
- the number of the wing parts 642 may be greater than or equal to the number of the guide wing parts 652 .
- the wing part 642 may function to generate air flow, and the guide wing part 652 may function to guide the flow generated by the wing part 642 .
- the wing portion 642 is configured to be directly rotated by a rotating shaft. Therefore, when the number of the wings 642 is increased, it is possible to more effectively generate an air flow.
- the guide blade part 652 is a fixed configuration, and when the number of the guide blade parts 652 is excessively large, the air flow may be obstructed.
- the air flow is more efficiently generated, and the generated air flow can be efficiently guided.
- the guide hub 651 includes a guide hub body 6511 forming a body from which the guide wing portion 652 protrudes, and a guide hub cap 6512 extending from the guide hub body 6511 to the impeller 640 direction. ) may be included. Extending here may be provided to be formed as a separate configuration and coupled, and may be integrally formed.
- the guide hub body 6511 and the guide hub cap 6512 may be provided in various shapes to stabilize the flow of air flowing inside the case 610 . The shape and effect of the guide hub cap 6512 will be described below.
- the case 610 forming the exterior may be provided to accommodate other components.
- the driving unit 620 including the stator 621 and the rotor 622 may be accommodated in the case 610 .
- the case 610 may accommodate all of the stator 621 , the rotor 622 , and the guide part 650 , but is not limited thereto, and may be provided to accommodate a portion.
- the rotating shaft 630 extending from the center of the rotor 622 toward the outlet 602 or the inlet 310 of the case 610 may be included.
- the guide part 650 may be coupled to an outer circumferential surface of the stator 621 .
- the impeller 640 may be coupled to one end of the rotation shaft 630 in the direction of the inlet 310 .
- the other end of the rotation shaft 630 may be accommodated by the bracket 660 .
- the bracket 660 may be coupled to one side of the case 610 .
- the guide part 650 may be coupled to the case 610 to support the driving part 620 , the rotation shaft 630 , and the impeller 640 .
- It may further include a main bearing part 631 coupled to the outer circumferential surface of the rotation shaft 630 positioned between the impeller 640 and the driving unit 620 to rotatably support the rotation shaft 630 .
- the main bearing part 631 may be provided to be in contact with the stator 621 or the guide part 650 between the stator 621 and the guide part 650 .
- the main bearing part 631 may be supported by the stator 621 or the guide part 650 .
- the main bearing part 631 may be provided to simultaneously contact one surface of the stator 621 facing the impeller 640 and an inner peripheral surface of the guide part 650 .
- An auxiliary bearing part 632 for rotatably supporting the rotation shaft 630 may be coupled to one end of the rotation shaft 630 in the direction of the discharge part 602 .
- the auxiliary bearing part 632 may support a load applied to the rotation shaft together with the main bearing part 631 .
- the auxiliary bearing unit 632 may be rotatably accommodated while receiving a supporting force by the bracket 660 for accommodating the auxiliary bearing unit 632 .
- the bracket 660 may be coupled to the guide part 650 or the case 610 to receive a load applied by the rotation shaft 630 .
- the bracket 660 protrudes from the outer peripheral surface of the receiving portion 661 and the receiving portion 661 provided with an accommodation space to accommodate the rotation shaft 630 to which the auxiliary bearing portion 632 is coupled to the guide. It may include a part 650 or a leg part 662 coupled to the case 610 .
- the accommodating part 661 and the leg part 662 may be integrally formed, but the present invention is not limited thereto.
- the accommodating part 661 may be provided so that an accommodating space is formed therein to surround the outer circumferential surface of the auxiliary bearing part 632 .
- the leg portion 662 may be provided in plurality, and if the number is sufficient to support the auxiliary bearing portion 632, various numbers may be provided.
- the leg portion 662 may be composed of two parts.
- the leg portion 662 includes a first leg 6621 protruding from the receiving portion in a radial direction of the receiving portion and a second leg projecting from the free end of the first leg 6621 toward the guide portion 650 . (6622).
- the second leg 6622 may be coupled to the guide part 650 or the case 610 to support the rotation shaft 630 and the auxiliary bearing part 632 .
- a receiving groove may be formed on one side of the guide hub 651 . This may be formed to engage with a protrusion protruding from the outer circumferential surface of the stator 621 . In addition, it may include a coupling portion protruding from one side of the second leg 6622 constituting the bracket 660 to be engaged with the receiving groove of the guide hub 651 . Through this, the stator 621 , the rotor 622 , and the rotation shaft 630 may be fixed in the receiving space formed by the guide part 650 and the bracket 660 .
- the guide part 650 may be provided to accommodate other components, but is not limited thereto.
- the guide part 650 may be integrally formed with the case 610 .
- the driving unit 620 may be provided between the guide unit 650 and the discharge unit 602 .
- the impeller 640 may also be provided to be coupled to the rotation shaft 630 between the guide part 650 and the driving part 620 .
- the guide unit 650 when the guide unit 650 is provided to accommodate the driving unit 620 , other components such as the driving unit 620 and the rotating shaft 630 may be disposed in the space occupied by the guide unit 650 . This has the effect of improving space efficiency.
- the driving part 620 it is possible to partially dampen the vibration generated by the Vibration generated according to the operation of the driving unit 620 is one of the main causes of noise when the hair dryer is operated.
- the guide part 650 , the main bearing part 631 , the auxiliary bearing part 632 , and the bracket 660 attenuate the vibration of the driving part 620 to make unnecessary noise while the user is using the hair dryer. to prevent discomfort or discomfort.
- FIG 5 illustrates an impeller according to an embodiment of the present disclosure.
- the impeller 640 is provided to protrude in the radial direction of the impeller 640 from the hub portion 641 and the hub portion 641 having a through hole coupled to the rotation shaft as described above. It may include a wing portion 642 that generates an air flow according to the rotation of the impeller 640 .
- the hub part 641 forms a body and includes a hub body 6411 providing an outer peripheral surface from which the wing parts 642 protrude, and a hub cap 6412 extending from the hub body 6411 in the inlet part 310 direction. ) may be included. As described above, extending here is a concept including being provided as an integral configuration and being provided as a separate configuration and coupled thereto.
- the wing portion 642 is adjacent to the inner peripheral surface of the first fixing portion 6421 corresponding to the portion in contact with the hub portion 641, the case 610 and forming a free end of the wing portion 642. It may include a first free portion 6422 and a first body portion 6423 connecting the first fixing portion 6421 and the first free portion 6422 .
- the first fixing part 6421 is a portion of the outer peripheral surface of the hub part 641 in contact with the wing part 642 and may mean a curved surface.
- the first free portion 6422 may refer to a portion of the wing portion 642 adjacent to the case 610 .
- the first free portion 6422 may mean a curve at the end of the wing portion 642 .
- the present invention is not limited thereto and may mean a curved surface forming the free end of the wing portion 642 .
- the first fixing part 6421 means a curved surface in contact with the wing part 642 among the outer peripheral surfaces of the hub part 641 , the rotation shaft 630 among the curved surfaces forming the first fixing part 6421 .
- the linear distance between both ends in the axial direction of can be defined as the first demonstration length (L1).
- chord length refers to a straight line distance between the point where the fluid first touches the object and the point where the fluid last touches the object when the fluid flows along a specific object.
- the straight line distance between the point where the air first touches the wing portion 642 and the last touch point It can be defined as the length of the demonstration.
- the first demonstration length L1 is greater than 1.4 times the first circumferential length, which is a value obtained by dividing the circumferential length of the hub body 6411 by the number of the wing parts 642, and is smaller than 1.5 times the first circumferential length.
- the first demonstration length L1 or the circumferential length of the hub body 6411 can be adjusted.
- the first circumferential length may mean an average circumferential length of the hub body 6411 occupied by one wing part 642 among the plurality of wing parts 642 . That is, the C/S value, which is a value obtained by dividing the first string length (L1) by the first circumferential length, may mean the ratio of the string length to the circumferential space occupied by one wing part 642 having the string length. have.
- the first circumferential length can be expressed as ⁇ *D1/N.
- N means the number of wing parts 642 .
- C is the first letter of chord, and as described above, the string length is indicated by reference numeral L in the drawing.
- the S value is the first letter of space and means a value obtained by dividing the circumferential length by the number N of the wing parts 642 .
- N means the length D, L, and the number of wing parts shown in the drawings.
- a second demonstration length L2 which is a linear distance between one end and the other end in the axial direction of the rotation shaft 630 of the first free portion 6422, is the circumference of a circle having the same diameter as the diameter D2 of the impeller 640. It may be provided to be greater than 1.4 times the second circumferential length, which is a value obtained by dividing the length by the number of the wing parts 642 , and less than 1.5 times the second circumferential length.
- the second circumferential length is expressed by an equation, it can be expressed as ⁇ *D2 / N.
- N means the number of wing parts 642 .
- the same diameter as the diameter D2 of the impeller 640 may mean the same diameter as the maximum diameter D2 of the impeller 640 . That is, it may mean the maximum length in the radial direction including the wing portion 642 .
- the flow efficiency of the air flowing into the impeller 640 is the highest and noise can be reduced. .
- the hub cap 6412 may be formed to have a reduced cross-sectional area from the hub body 6411 toward the inlet 310 .
- the cross-section referred to herein means a cross-section perpendicular to the axial direction of the rotation shaft 630 .
- the flow of air sucked into the suction part 601 of the case 610 as the impeller 640 rotates may generate a vortex while passing the hub part 641. .
- the vortex flows into the wing portion 642 while the vortex is generated, a three-dimensional flow is formed, resulting in flow loss and reducing the efficiency of the impeller.
- unwanted noise may be generated, which may cause discomfort to the user.
- the hub cap 6412 has a first surface S1 having a circular shape forming a free end, and extends from the first surface S1 toward the hub body 6411 to form a side surface of the hub cap 6412 . It may include a second surface (S2) forming a.
- the second surface S2 may be formed to increase in inclination from the first surface S1 to the hub body 6411 . That is, the hubcap 6412 may be provided to have a cross-section in a trapezoidal shape in which a cross section in a direction parallel to the axial direction of the rotation shaft 630 is formed not in a trapezoidal shape but in a convex curve.
- the second surface S2 may be convex toward the extension direction of the hub cap 6412 .
- connecting two parallel sections with a curved surface can be expressed as “blend treatment” or “blend”. That is, it is possible to stabilize the flow flowing into the suction unit 601 by applying a blend to the hub cap 6412 .
- the second surface S2 is provided with a curved surface to prevent flow loss when the inflow is stabilized, thereby improving the efficiency and stability of the impeller 640 .
- it is possible to prevent the vortex from occurring in the flow there is an effect of reducing the noise generated by the vortex.
- the first surface S1 may be disposed on the same line as one end of the case 610 on which the inlet 310 is formed. Since the existing hubcap 6412 is not formed in a curved surface as in the present disclosure, the length of the hubcap 6412 is extended to protrude out of the case 610 to reduce flow loss. However, when the second surface S2 is formed as a curved surface as in the present disclosure, it is not necessary to extend the length of the hub cap 6412 , so that the height can be matched with one end of the case 610 .
- the load of the impeller 640 may be relatively reduced. Therefore, it may not be necessary to form a groove unlike the conventional product using a method of digging a groove in the interior of the impeller 640 to lower the load of the impeller 640 .
- the hub cap 6412 can be made smaller, so to lower the load of the impeller 640, the impeller ( There is no need to dig a groove on one surface of the driving unit 620 in the direction of the 640). Therefore, there is an effect that can solve the noise problem generated by the impeller 640 of the existing product.
- an axial separation between the guide part 650 and one surface of the hub body 6411 facing the guide part 650 may be formed constant.
- FIG. 6 illustrates a guide unit according to an embodiment of the present disclosure.
- the guide part 650 may include a guide hub 651 that forms an accommodating space therein, and a guide wing part 652 that protrudes from the guide hub 651 in a radial direction. .
- the guide hub 651 may accommodate the driving unit 620 and the rotating shaft 630 therein.
- the guide wing portion 652 protruding from the outer circumferential surface of the guide hub 651 may serve to guide the air introduced by the impeller 640 to be discharged toward the discharge unit 602 .
- the guide wing portion 652 may be provided in plurality.
- the guide wing portion 652 may be provided to protrude from the guide hub 651 so as to be parallel to the axial direction of the rotation shaft 630 .
- the guide wing portion 652 may be provided to have a constant inclination relative to the axial direction. When the guide wing portion 652 is provided with an inclination, it is possible to partially prevent the formation of turbulence on the surface.
- the guide hub 651 extends in the direction of the guide hub body 6511 from which the guide wing part 652 protrudes and the guide hub body 6511 adjacent to the impeller 640 in the direction of the impeller 640. It may include a guide hub cap (6512).
- extended refers to a concept that includes both those that are extended to be integrally formed and those that are provided in a separate configuration and are provided in contact with each other.
- the C/S value may also be appropriately adjusted for the guide part 650 .
- the guide wing portion 652 is adjacent to the inner peripheral surface of the second fixing portion 6521 corresponding to the portion in contact with the guide hub 651, the case 610 and the free end of the guide wing portion 652. It may include a second free portion 6522 to form and a second body portion 6523 connecting the second fixing portion 6521 and the second free portion 6522 .
- the second fixing part 6521 is a part of the outer peripheral surface of the guide hub 651 in contact with the guide wing part 652 and may mean a curved surface.
- the second free portion 6522 may refer to a portion of the guide wing portion 652 adjacent to the case 610 .
- the second free portion 6522 may mean a curve at the end of the guide wing portion 652 .
- the present invention is not limited thereto and may mean a curved surface forming a free end of the guide wing portion 652 .
- the rotation shaft 630 among the curved surfaces forming the second fixing part 6521 can be defined as the length of the third demonstration by the linear distance between both ends in the axial direction.
- chord length refers to a straight line distance between the point where the fluid first touches the object and the point where the fluid last touches the object when the fluid flows along a specific object.
- the straight line between the point where the air first touches the guide wing portion 652 and the last touch point can be defined as the length of the demonstration.
- the third demonstration length L3 is greater than 1.5 times the third circumferential length, which is a value obtained by dividing the circumferential length of the guide hub body 6511 by the number of the guide wing parts 652, and is greater than twice the third circumferential length.
- the third demonstration length L3 or the circumferential length of the guide hub body 6511 may be adjusted to be small.
- the third circumferential length may mean an average circumferential length of the guide hub body 6511 occupied by one guide wing part 652 among the plurality of guide wing parts 652 . That is, the C/S value, which is a value obtained by dividing the third string length L3 by the third circumferential length, means the ratio of the string length to the circumferential space occupied by one guide wing unit 652 having the string length.
- the third circumferential length means ⁇ *D3 / N.
- N means the number of guide wing portions (652).
- the fourth demonstration length L4 which is a linear distance between one end and the other end in the axial direction of the rotation shaft 630 of the second free portion 6522, is the circumferential length of a circle having the same diameter as the diameter of the guide portion 650. It may be provided with greater than 1.5 times the fourth circumferential length, which is a value divided by the number of the guide wing parts 652 , and smaller than twice the fourth circumferential length.
- N means the number of guide wing portions (652).
- the diameter equal to the diameter of the guide part 650 may mean the same diameter as the maximum diameter of the guide part 650 . That is, it may mean the maximum length in the radial direction including the guide wing portion 652 .
- the C/S value for the guide part 650 has a value between 1.5 and 2.0, the flow efficiency of the air flowing into the impeller 640 is the highest and the effect of reducing noise is have.
- the third demonstration length L3 may be greater than or equal to the first demonstration length L1.
- the first demonstration length L1 corresponds to a length associated with the wing portion 642 that directly generates air flow
- the third demonstration length L3 corresponds to a length associated with the guide blade portion 652 for guiding air. applicable.
- the air flow generated in the wing part 642 may be more effectively guided toward the discharge part.
- the wing portion 642 is provided excessively large, an excessive load is applied to the rotation shaft 630 for rotating the wing portion 642 , so the load applied to the rotation shaft 630 by adjusting the length of the wing portion 642 . can be alleviated.
- the air flow efficiency of the air flow unit is increased and the rotation shaft 630 can be prevented from being damaged.
- the third circumferential length may be greater than or equal to the first circumferential length. While the number of the wing parts 642 is greater than the number of the guide wing parts 652 , the circumferential length of the hub part 641 may be shorter than the circumferential length of the guide hub 651 .
- the third circumferential length obtained by dividing the circumferential length of the guide hub 651 by the number of guide wing parts 652 is greater than the first circumferential length obtained by dividing the circumferential length of the hub part 641 by the number of wing parts 642 . or may be provided in the same way.
- the guide hub cap 6512 may include a third surface S3 facing the impeller and a fourth surface S4 extending from the outer circumferential surface of the third surface S3 toward the guide hub body 6511.
- the third surface S3 may have a smaller area than the cross-sectional area of the guide hub body 6511 . That is, the cross-sectional area of the guide hub cap 6512 may be formed to increase from the third surface toward the guide hub body 6511 .
- the cross-sectional area referred to herein may mean an area of a cross-section in a direction perpendicular to the axial direction of the rotation shaft 630 .
- the fourth surface S4 may have a curved surface. That is, the fourth surface S4 may be provided such that the slope increases from the third surface S3 toward the guide hub body 6511 . In other words, the fourth surface S4 may be convex toward the impeller 640 .
- the third surface S3 forming the free end of the guide hub cap 6512 may have a diameter greater than or equal to the diameter of the hub body 6411 .
- the diameter of the third surface S3 is smaller than the diameter of the hub body 6411, the flow path of the air flowing into the case 610 through the impeller 640 is the third surface. It passes through (S3) and the result is expanded.
- the air introduced into the case 610 through the impeller 640 flows through a flow path that flows smoothly Therefore, the flow loss can be minimized and the noise generated by turbulence can be reduced.
- FIG. 7 illustrates an impeller and a guide unit.
- the wing part 642 constituting the impeller 640 and the guide wing part 652 constituting the guide part 650 are in the axial direction XX of the rotation shaft 630, respectively. can be formed side by side.
- the wing portion 642 constituting the impeller 640 is required to be inclined with the axial direction (X-X) of the rotation shaft 630 in order to suck in external air according to the rotation.
- the axial direction (X-X) of the rotation shaft 630 and the wing portion 642 of the impeller 640 are provided side by side, it may be difficult to generate a flow of air according to the rotation.
- the air flow generated by the wing part 642 of the impeller 640 is guided in the direction of the discharge part 602 .
- the guide wing portion 652 it is not essential to be provided at an angle to the axial direction (X-X) of the rotation shaft 630 .
- the guide wing part 652 constituting the guide part 650 is opposite to the direction in which the wing part 642 constituting the impeller forms an inclination with the axial direction XX of the rotation shaft 630 . It is preferable to be provided inclined in the direction.
- the flow of air passing through the impeller 640 by inclining the wing portion 642 of the impeller 640 may generate turbulence and vortex in the inclination direction of the wing portion 642 .
- the intensity of turbulence and vortex is further increased, which is the flow It may cause side effects such as an increase in loss and noise generation.
- the efficiency and stability of the hair dryer can be improved by reducing the flow loss caused by the turbulence or vortex.
- the graph shows that the maximum efficiency is achieved when the C/S value is around 1.5. If it is less than 1.5, it can be seen that the efficiency also increases as the C/S value increases. However, when it exceeds 1.5, it can be seen that the efficiency decreases as the C/S value increases. That is, since it has a local maximum in the vicinity of 1.5, it is preferable to appropriately adjust the size of the impeller 640 to bring the C/S value close to 1.5.
- the impeller 640 may generate maximum flow efficiency.
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Abstract
Description
Claims (20)
- 일측에 공기가 토출되는 토출부가 구비되는 본체부;상기 본체부의 일측에서 연장되고, 상기 토출부와 연통되어 외기가 유입되는 유입부를 포함하는 손잡이부;상기 본체부 내부에 구비되어 상기 유입부로 유입된 공기를 가열하는 히터; 및상기 본체부 또는 상기 손잡이부 중 어느 하나에 배치되어 상기 유입부로 유입된 공기를 상기 토출부로 이동시키는 공기유동유닛;을 포함하고,상기 공기유동유닛은외관을 형성하며 일측에 흡입부가 구비되고 타측에 배출부가 구비되는 케이스;상기 케이스 내부에 고정되어 회전자기장을 발생시키는 고정자와 상기 고정자에 수용되어 상기 회전자기장에 의해 회전하는 회전자를 포함하는 구동부;상기 회전자에서 상기 흡입부 또는 상기 배출부를 향해 연장되거나 결합되는 회전축;상기 흡입부와 인접한 상기 회전축의 일단에 결합되어 상기 회전축과 같이 회전하며 대기중의 공기를 흡입하는 임펠러;를 포함하고,상기 임펠러는상기 회전축과 결합되는 허브부; 및상기 허브부에서 상기 케이스의 내주면을 향해 돌출되어 상기 회전축이 회전함에 따라 공기 유동을 발생시키는 날개부;를 하나 이상 포함하며,상기 날개부는 상기 허브부와 접촉되는 제1고정부, 상기 케이스에 인접하여 자유단을 형성하는 제1자유부 및 상기 제1고정부와 상기 제1자유부를 연결하는 제1몸통부를 포함하고,상기 제1고정부의 상기 회전축의 축방향 일단과 타단의 직선거리인 제1시위길이는 상기 허브부의 원주길이를 상기 날개부의 개수로 나눈 값인 제1원주길이의 1.4배보다 크고 상기 제1원주길이의 1.5배 보다 작은 것을 특징으로 하는 헤어드라이어.
- 제 1항에 있어서,상기 제1자유부의 상기 회전축의 축방향 일단과 타단의 직선거리인 제2시위길이는 상기 임펠러의 직경과 동일한 직경을 가지는 원의 원주길이를 상기 날개부의 개수로 나눈 값인 제2원주길이의 1.4배보다 크고 상기 제2원주길이의 1.5배 보다 작은 것을 특징으로 하는 헤어드라이어.
- 제 1항에 있어서,상기 고정자의 외주면에 결합되어 상기 임펠러에 의해 흡입된 공기를 상기 배출부를 향해 안내하는 가이드부;를 포함하는 것을 특징으로 하는 헤어드라이어.
- 제 3항에 있어서,상기 가이드부는상기 고정자와 결합되는 가이드허브; 및상기 가이드허브에서 상기 케이스의 내주면을 향해 돌출되어 상기 임펠러에 의해 흡입된 공기를 상기 배출부로 안내하는 가이드날개부;를 하나 이상 포함하는 헤어드라이어.
- 제 4항에 있어서,상기 날개부의 개수는 상기 가이드날개부의 개수보다 많거나 같은 것을 특징으로 하는 헤어드라이어.
- 제 4항에 있어서,상기 가이드날개부는 상기 가이드허브와 접촉되는 제2고정부, 상기 케이스에 인접하여 자유단을 형성하는 제2자유부 및 상기 제2고정부와 상기 제2자유부를 연결하는 제2몸통부를 포함하고,상기 제2고정부의 상기 회전축의 축방향 일단과 타단의 직선거리인 제3시위길이는 상기 가이드허브의 원주길이를 상기 가이드날개부의 개수로 나눈 값인 제3원주길이의 1.5배보다 크고 상기 제3원주길이의 2배 보다 작은 것을 특징으로 하는 헤어드라이어.
- 제 6항에 있어서,상기 제3시위길이는 상기 제1시위길이보다 크거나 같게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 6항에 있어서,상기 제3원주길이는 상기 제1원주길이보다 크거나 같게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 6항에 있어서,상기 제2자유부의 상기 회전축의 축방향 일단과 타단의 직선거리인 제4시위길이는 상기 가이드부의 직경과 동일한 직경을 가지는 원의 원주길이를 상기 가이드날개부의 개수로 나눈 값인 제4원주길이의 1.5배보다 크고 상기 제4원주길이의 2배 보다 작은 것을 특징으로 하는 헤어드라이어.
- 제 4항에 있어서,상기 가이드허브의 직경은 상기 허브부의 직경보다 크거나 같은 것을 특징으로 하는 헤어드라이어.
- 제 4항에 있어서,상기 날개부는 상기 회전축의 축방향에 대하여 경사지게 구비되고,상기 가이드날개부는 상기 회전축의 축방향에 대하여 상기 날개부와 반대방향으로 경사지게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 1항에 있어서,상기 허브부는상기 날개부가 돌출되는 허브바디; 및상기 흡입부와 인접한 상기 허브바디의 일면에서 상기 흡입부를 향해 연장되는 허브캡;을 포함하고,상기 허브캡은 연장방향을 따라 단면적이 감소되는 것을 특징으로 하는 헤어드라이어.
- 제 12항에 있어서,상기 허브캡은 자유단을 형성하는 제1면과 상기 제1면과 상기 허브바디를 연결하는 제2면을 포함하고,상기 제1면의 직경은 상기 허브바디의 직경보다 작게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 13항에 있어서,상기 제2면은 상기 흡입부를 향해 볼록하게 형성되는 것을 특징으로 하는 헤어드라이어.
- 제 13항에 있어서,상기 제1면은 상기 케이스의 내부에 배치되는 것을 특징으로 하는 헤어드라이어.
- 제 4항에 있어서,상기 가이드허브는상기 가이드날개부가 돌출되는 가이드허브바디; 및상기 임펠러와 인접한 상기 가이드허브바디의 일면에서 상기 임펠러를 향해 연장되는 가이드허브캡;을 포함하고,상기 가이드허브캡은 연장방향을 따라 단면적이 감소되는 것을 특징으로 하는 헤어드라이어.
- 제 16항에 있어서,상기 가이드허브캡은 자유단을 형성하는 제3면과 상기 제3면과 상기 가이드허브바디를 연결하는 제4면을 포함하고,상기 제3면의 직경은 상기 가이드허브바디의 직경보다 작게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 17항에 있어서,상기 제3면의 직경은 상기 허브부의 직경보다 크거나 같게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 16항에 있어서,상기 가이드허브의 직경은 상기 허브부의 직경보다 크거나 같게 구비되는 것을 특징으로 하는 헤어드라이어.
- 제 1항에 있어서,상기 공기유동유닛은 상기 손잡이부에 구비되고, 상기 유입부와 상기 본체부 사이에 위치하는 것을 특징으로 하는 헤어드라이어.
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EP21803731.5A EP4151118A4 (en) | 2020-05-11 | 2021-03-11 | HAIR DRYER |
US17/924,485 US20230180906A1 (en) | 2020-05-11 | 2021-03-11 | Hairdryer |
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EP4151118A4 (en) | 2024-05-29 |
US20230180906A1 (en) | 2023-06-15 |
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