WO2022071620A1 - Soufflante - Google Patents

Soufflante Download PDF

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Publication number
WO2022071620A1
WO2022071620A1 PCT/KR2020/013694 KR2020013694W WO2022071620A1 WO 2022071620 A1 WO2022071620 A1 WO 2022071620A1 KR 2020013694 W KR2020013694 W KR 2020013694W WO 2022071620 A1 WO2022071620 A1 WO 2022071620A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
air
blower
impeller
flow
Prior art date
Application number
PCT/KR2020/013694
Other languages
English (en)
Korean (ko)
Inventor
김태균
Original Assignee
에스아이지(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 에스아이지(주) filed Critical 에스아이지(주)
Priority to KR1020227002145A priority Critical patent/KR102568173B1/ko
Publication of WO2022071620A1 publication Critical patent/WO2022071620A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • 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
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible

Definitions

  • the present invention relates to a blower that sucks air and discharges it in a predetermined direction. More specifically, as a blower device that is essential to devices that need to form an air flow, including a bladeless fan, a humidifier, an air purifier, and an air conditioner, after sucking air from the suction unit formed in a specific part It is about a blower device that sucks in air and then discharges it to spray air in a certain direction.
  • a blower is a device that has an inlet and an outlet, sucks air from the inlet and discharges it to the outlet, and forms an air flow.
  • the blower is widely applied to home appliances.
  • a blower is essential to control the temperature of a specific space by sucking in high-temperature air and discharging it to an evaporator, and an air purifier sucks in contaminated air.
  • a blower is essential to purify the air in a specific space by passing it through a filter to filter out contaminants and then discharging it to the outside.
  • a fan used in summer. After binding a motor to one side of a blade, commonly referred to as a fan blade, a blower is used to rotate the blade to send air in a certain direction.
  • the conventional blower device uses a simple principle of causing air flow by rotating the blade after binding the motor to the central part of the large blade.
  • the size of the blade must be large and a motor for rotation of the blade is installed at the rear, so there is a problem in that the volume is large and the volume occupied by the blower is increased.
  • the blade is exposed to the outside and it is generally configured to rotate the blade in a housing shaped like a grate, but the air flow is not stable. There is a problem with a high risk of injury when used at home.
  • Korean Patent Application Laid-Open No. 10-2010-0051724 discloses a no-blade blower assembly 100 including a nozzle 1 and an air flow generating means for generating an air flow.
  • a blower is disclosed having a mouth (12) which receives a stream of air from 10) and directs the stream of air towards the Coanda surface.
  • the air flow generating means disclosed in Korean Patent Publication No. 10-2010-0051724 includes a mixed flow impeller for generating an air flow and a diffuser having a spiral blade located downstream of the impeller, wherein the flow of air generated from the impeller is There is a disadvantage that the flow rate is lowered as it is discharged through the diffuser, and a high-power motor must be used to overcome the disadvantage that the air flow is weak as the flow rate is lowered. There is a problem in that the volume of the air flow generating means is large, a high-power motor is used, and the noise increases as the flow path becomes complicated.
  • the present invention is to solve the above problems, and in a blower that generates a flow of air through the impeller, a part of the driving unit for driving the impeller is inserted into the impeller and installed, so that the volume of the blower can be configured to be small, It has a closed shape except for the flow path that sprays air, so it can provide efficient air flow, and it can form the air flow efficiently by simplifying the flow path that passes after air is sucked in until it is discharged.
  • An object of the present invention is to provide a blower capable of minimizing the flow velocity loss by minimizing the eddy current in the vicinity of air discharge through the member.
  • the blower of the present invention is a blower for inducing a flow of air, the base module including an air suction unit through which air is sucked for the flow of air induced by the blower;
  • a blower module installed in the base module so that air is sucked into the air intake unit and discharged in a preset direction, and the blower module installed to communicate with the blower module, the air discharged from the blower module is sprayed in a preset direction and an impeller for discharging the sucked air in a preset direction while allowing air to be sucked from the air intake unit, and a driving unit for rotating the impeller to generate a flow of air; and the impeller and a blower housing in which the driving unit is accommodated.
  • the impeller has two or more blades fixedly installed on the surface in order to induce the flow of air, and has a shape having a larger cross-sectional area than a portion where air is sucked in and discharged, and the blade is an impeller to induce air flow It is characterized in that it is installed to have a certain inclination on the surface of the.
  • blowing module and the injection module are connected through a communication module, and the communication module is formed such that the air supplied from the blowing module is transmitted only to the injection module, except for a flow path formed in communication from the blowing module to the injection module so as to be closed. characterized by being
  • the communication module includes a heat dissipation unit for dissipating heat generated by the driving unit on an upper portion of the driving unit, and the heat dissipation unit is connected and fixed to the communication module by two or more ribs.
  • a power line for supplying power to the driving unit is inserted into any one of the ribs and connected to the driving unit.
  • the dispersion member is provided between the blowing module and the injection module and installed on the lower surface of the injection module facing the blowing module so that the air supplied from the blowing module is dispersed and introduced into the injection module.
  • the dispersing member is characterized in that it is formed in a streamlined cone shape with a cross-sectional area that becomes wider as it goes away from the blowing module.
  • the dispersing member is installed in the injection module, is formed to have a pointed triangular cross section in the direction of the blowing module, and is characterized in that it is provided to distribute the flow of air from the blowing module to both sides of the injection module.
  • the driving unit for rotating the impeller is installed such that a part of the driving unit is inserted into one end of the impeller and is coupled at the other end of the impeller.
  • the present invention having the above configuration can be applied to a blower in various environments by minimizing the volume of the blower including the impeller and the driving unit.
  • blower is configured simply, and essential parts of the blower are minimized to maximize the blowing efficiency, while minimizing the manufacturing cost and efficient production.
  • FIG. 1 is an upper/lower plan view and a side view of a blower according to an embodiment of the present invention
  • FIG. 2 is a view showing that the flow of air through the dispersion member according to an embodiment of the present invention is optimized
  • FIG. 3 is a view showing an impeller of a blower according to an embodiment of the present invention.
  • FIG. 4 is a view showing an example of applying the blower according to an embodiment of the present invention to a bladeless blower
  • FIG. 5 is a view showing a spray module when the blower according to an embodiment of the present invention is applied to a bladeless blower;
  • FIG. 6 is a view showing an example of applying the blower according to an embodiment of the present invention to a dressing table
  • FIG. 7 is a perspective view showing an interlocking module of a blower according to an embodiment of the present invention.
  • FIG. 8 is a view showing one side of the interlocking module of the blower according to an embodiment of the present invention.
  • FIG. 9 is a view showing an example of a dispersing member of the blower according to an embodiment of the present invention.
  • Injection module 300 Communication module: 400
  • Dispersion member 500
  • the blower of the present invention is a blower for inducing a flow of air, the base module including an air suction unit through which air is sucked for the flow of air induced by the blower;
  • a blower module installed in the base module so that air is sucked into the air intake unit and discharged in a preset direction, and the blower module installed to communicate with the blower module, the air discharged from the blower module is sprayed in a preset direction and an impeller for discharging the sucked air in a preset direction while allowing air to be sucked from the air intake unit, and a driving unit for rotating the impeller to generate a flow of air; and the impeller and a blower housing in which the driving unit is accommodated.
  • FIG. 1 is an upper/lower plan view and a side view of a blower according to an embodiment of the present invention
  • FIG. 2 is a view showing that the flow of air is optimized through a dispersing member according to an embodiment of the present invention
  • FIG. 3 is a view showing an impeller of a blower according to an embodiment of the present invention
  • Figure 4 is a view showing an example of applying the blower according to an embodiment of the present invention to a bladeless blower
  • Figure 5 is one of the present invention It is a view showing a spray module when the blower according to the embodiment is applied to a bladeless blower
  • FIG. 6 is a view showing an example of applying the blower according to an embodiment of the present invention to a dressing table
  • FIG. 7 is a view of the present invention A perspective view showing an interlocking module of a blower according to an embodiment
  • FIG. 8 is a view showing one side of an interlocking module of a blower according to an embodiment of the present invention
  • FIG. It is a figure which shows an example of the dispersion member of a blower apparatus.
  • the present invention relates to a blower, and the basic function is to suck in air and discharge it at a preset wind speed according to the situation.
  • a typical blower is a fan.
  • the basic configuration of a conventional blower is a configuration that rotates a configuration having a certain inclination expressed as a blade or a blade to push the air behind the blade to the front. It is common to install and fix a motor in the center of one side of the blade. In this conventional blower device, the flow of air is formed according to the rotation of the blade, so the wind strength is not constant and a space necessary for the rotation of the blade must be secured, and a space for the motor by a certain distance must be provided on one side of the blade. There are many problems in terms of space for installation.
  • the blower device of the present invention is to solve the problems of the conventional blower device, and includes a base module 100 including an air intake port 110 for sucking air in order to induce a flow of air in a desired shape, and a base module ( Installed and fixed in 100) and communicating with the air intake 110, the blowing module 200 that sucks air from the air intake 110 and discharges the sucked air in a preset direction, and the blowing module 200 communicate with each other It is installed so as to include a spray module 300 for spraying the air discharged from the blowing module 200 in a desired direction.
  • the blower module 200 includes an impeller 210 that rotates to allow air to be sucked from the air intake 110 and to discharge the sucked air in a preset direction, and the impeller 210 to rotate to create a flow of air. It comprises a driving unit 220 providing driving force, an impeller 210 and a blower housing 230 in which the driving unit 220 is accommodated.
  • the base module 100 of the present invention is configured to install and fix the blowing module of the present invention therein.
  • the lower housing is the base module 100 as shown in FIG. 4, and the one shown in FIG.
  • the lower structure under the mirror is the base module 100 .
  • the shape of the base module 100 will vary depending on the device in which the blower of the present invention is installed, but basically, an air intake unit 110 for sucking air from the outside is provided.
  • a series of configurations in which the air intake unit 110 and the blower are connected and the blower module 200 is fixed is a configuration provided therein.
  • the base module 100 may be made of a plastic material in the case of home appliances, may be made of wood in the case of furniture, and may be made of a metal material when used in a kitchen hood, so that the blower of the present invention is utilized. Material and shape may vary depending on the product.
  • the base module 100 is provided with an air inlet 110 for sucking air to be supplied to the blower. As shown in FIG. 4 , the air inlet may be formed with several holes for air inlet, and in a specific direction. It may be formed as a single large hole, and the shape of the air intake 110 may be adjusted according to the purpose of the product used and the installation environment.
  • the blower module 200 of the present invention is configured to suck in external air from the air intake 110 provided in the base module 100 and discharge the air in a preset direction.
  • the blower module 200 has an impeller 210 and an impeller 210 in which a plurality of blades 215 are formed on the outer surface in order to perform a function of sucking and discharging air, that is, to form a flow of air through a rotational motion.
  • the driving unit 220, the impeller 210, and the driving unit 220 are accommodated and fixed therein, and a constant flow path for discharging the sucked air in a predetermined direction is formed therein, including a blower housing 230 formed therein.
  • the impeller 210 which plays a key role in the blower module 200, can be divided into a part where air is sucked in and a part where air is discharged, and the cross-sectional area of each part has a small air intake as shown in FIG. is made to If the cross section of the impeller 210 is formed so that the air intake portion is narrow and the air discharge portion becomes wider as described above, the air flow can be formed more efficiently and the space occupied by the blower module 200 can be reduced.
  • the blade 215 formed on the outer surface of the impeller 210 is inclined with respect to the vertical cross section of the impeller 210 , and for example, the length of the air intake portion is long and the length of the discharge portion is short.
  • the blower module 200 When formed in such a way that the blower module 200 is configured to have a cylindrical shape, the overall volume of the blower module 200 can be efficiently utilized while maximizing the blowing efficiency.
  • the shape of the impeller 210 is formed into an empty space and then the driving unit 220 providing driving force for rotation of the impeller 210 is configured to be inserted in whole or in part, the volume of the blower module 200 can be configured more efficiently.
  • the driving unit 220 of the blowing module 200 is configured to generate and transmit a rotational driving force for rotating the impeller 210, and various types of driving devices can be utilized according to the environment in which the blowing module 200 is used.
  • the blower housing 230 has a configuration in which the impeller 210 and the driving unit 220 are inserted and installed therein, and a configuration in which air is sucked on one side and a configuration in which air is discharged on the other side is provided, and the noise caused by the driving of the driving part 220 It may be installed by inserting an elastic member for suppressing excessive vibration.
  • the injection module 300 of the present invention is connected to a portion from which the air is discharged from the blower module 200 and is configured to spray air according to the characteristics of the device in which the blower of the present invention is installed.
  • the blower of the present invention when applied to a bladeless fan, it may be formed in a configuration called a so-called nozzle, and the air intake unit formed in the base module 100 as shown in FIG. 4 . Air sucked from the 110 is discharged through the blower module 200 and is delivered to the spray module 300 to be sprayed.
  • the injection module 300 injects air through the narrow gaps of the nozzles having a structure like the wings of an airplane as a whole to form a flow of air that is amplified several tens of times through the air amplification effect, and the air flows along the surface of the nozzle. It has a structure that amplifies the surrounding air and sprays it forward.
  • the jetting modules 300 are disposed at both ends of the dressing table mirror, and the air discharged from the blowing module 200 is delivered to both jetting modules 300 and sprayed.
  • the blowing structure thin and simple. 200
  • the communication module 400 of the present invention is provided between the blowing module 200 and the injection module 300 to connect the two components. It is configured such that the space other than the flow path between the module 200 and the injection module 300 is sealed.
  • the driving unit 220 in which some or all of the impeller 210 is inserted and installed may generate heat depending on the driving, and it is necessary to cool the heat.
  • the driving unit 220 in the communication module 400 is provided with a heat dissipation unit 410 having a hole for dissipation formed on the upper portion of the installed portion, and is fixed through the outer portion of the communication module 400 and two or more ribs 420 .
  • the rib 420 for fixing the heat dissipation unit 410 is preferably configured to have a minimum volume, which is a flow path for the rib 420 to transfer the air generated from the blowing module 200 to the injection module 300 . Since it is installed on the 430, it is to maximize the blowing efficiency.
  • the power line P for supplying power to the driving unit 220 is shown to be installed on the flow path 430 separately from the rib 420, but as shown in FIG. If the through-hole 425 is formed inside the rib 420 and positioned inside the power line P, there is an effect that the blowing efficiency can be further maximized.
  • the dispersion member 500 of the present invention prevents the wind supplied from the blowing module 200 to the spray module 300 from colliding with one side of the spray module 300 to generate a vortex, and the spray direction formed in the spray module 300 . It is configured to efficiently transfer air to the As shown in FIG. 2 through the dispersing member 500 , it is possible to prevent a vortex that may occur while air is delivered to the injection module 300 , thereby maximizing the blowing efficiency and in the injection direction of the injection module 300 . There is an effect of inducing air to deliver air without lowering the wind speed.
  • the dispersing member 500 is preferably formed to have an inverted triangular shape as shown in FIGS.
  • the blowing module 200 side is sharp and the injection module ( 300) is preferably configured so that the side is widened.
  • the external shape can be variously configured to induce the flow of air more efficiently and to induce the flow of air according to the injection direction of the injection module 300 . .
  • the flow path 430 formed between the blowing module 200 and the injection module 300 is formed without resistance, and the dispersion member 500 is disposed at the end of the blowing module 200 to prevent vortex flow. In this way, the blowing efficiency can be maximized.

Abstract

La présente invention concerne une soufflante et, plus spécifiquement, une soufflante générant un écoulement d'air à travers une roue d'impulseur, la soufflante ayant une partie d'entraînement qui entraîne la roue d'impulseur et a une partie disposée par insertion dans la roue d'impulseur de telle sorte que la soufflante peut avoir un petit volume ; ayant une forme fermée, à l'exception d'un trajet d'écoulement permettant de souffler de l'air, de telle sorte qu'un écoulement d'air efficace peut être fourni ; simplifiant le trajet d'écoulement à travers lequel l'air passe lorsqu'il est aspiré et jusqu'à ce qu'il soit évacué, de sorte que l'écoulement d'air peut être formé efficacement ; et minimisant les tourbillons à proximité de la zone de décharge d'air à travers un élément de dispersion de telle sorte que la perte de vitesse d'écoulement peut être réduite au minimum.
PCT/KR2020/013694 2020-09-30 2020-10-07 Soufflante WO2022071620A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020227002145A KR102568173B1 (ko) 2020-09-30 2020-10-07 송풍 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20200127633 2020-09-30
KR10-2020-0127633 2020-09-30

Publications (1)

Publication Number Publication Date
WO2022071620A1 true WO2022071620A1 (fr) 2022-04-07

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ID=80950692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2020/013694 WO2022071620A1 (fr) 2020-09-30 2020-10-07 Soufflante

Country Status (2)

Country Link
KR (1) KR102568173B1 (fr)
WO (1) WO2022071620A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013050113A (ja) * 2009-03-04 2013-03-14 Dyson Technology Ltd 送風機
US20140079566A1 (en) * 2007-09-04 2014-03-20 Dyson Technology Limited Fan
KR101472759B1 (ko) * 2014-02-07 2014-12-15 이광식 날개 없는 선풍기
KR20160149051A (ko) * 2015-06-17 2016-12-27 주식회사 도무스씨앤엠 날개 없는 선풍기
KR101979679B1 (ko) * 2018-03-19 2019-08-28 (주)메가트론 보관성과 사용성이 향상된 날개없는 휴대용 선풍기 및 이 휴대용 선풍기를 구비한 스탠드형 선풍기장치

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102062105B1 (ko) * 2018-07-31 2020-01-03 노지용 선풍기

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140079566A1 (en) * 2007-09-04 2014-03-20 Dyson Technology Limited Fan
JP2013050113A (ja) * 2009-03-04 2013-03-14 Dyson Technology Ltd 送風機
KR101472759B1 (ko) * 2014-02-07 2014-12-15 이광식 날개 없는 선풍기
KR20160149051A (ko) * 2015-06-17 2016-12-27 주식회사 도무스씨앤엠 날개 없는 선풍기
KR101979679B1 (ko) * 2018-03-19 2019-08-28 (주)메가트론 보관성과 사용성이 향상된 날개없는 휴대용 선풍기 및 이 휴대용 선풍기를 구비한 스탠드형 선풍기장치

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KR20220058525A (ko) 2022-05-09
KR102568173B1 (ko) 2023-08-18

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