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WO2022191552A1 - Atténuateur de vitesse de vent - Google Patents

Atténuateur de vitesse de vent Download PDF

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Publication number
WO2022191552A1
WO2022191552A1 PCT/KR2022/003213 KR2022003213W WO2022191552A1 WO 2022191552 A1 WO2022191552 A1 WO 2022191552A1 KR 2022003213 W KR2022003213 W KR 2022003213W WO 2022191552 A1 WO2022191552 A1 WO 2022191552A1
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WO
WIPO (PCT)
Prior art keywords
wind speed
frame
attenuator
fine net
speed attenuator
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2022/003213
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English (en)
Korean (ko)
Inventor
정형일
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2022191552A1 publication Critical patent/WO2022191552A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a wind speed attenuator for reducing wind speed, and more particularly, to a wind speed attenuator for reducing the wind speed of air discharged through an outlet of an air conditioner.
  • the windless air conditioner is also a convection type air conditioner using a blower, and the wind speed is not zero. That is, 'no wind' refers to a case in which the wind speed is significantly reduced compared to a typical air conditioner, for example, having a wind speed of 0.15 m/sec or less.
  • Patent Document 1 Korean Patent Registration No. 10-1698842
  • the windless air conditioner remarkably lowers the wind speed by forming a number of fine holes in the discharge part.
  • a wind speed attenuator is a wind speed attenuator mounted on an outlet of an air conditioner to reduce the wind speed of air discharged through the outlet, and has a size and shape corresponding to the outlet and has an open interior, a frame mountable on an outer or inner circumferential surface of the outlet; and a fine net fixed while blocking the open portion of the frame, and when the frame is mounted in close contact with the outer or inner circumferential surface of the outlet, the outlet is completely sealed, and the air discharged through the outlet is the fine net It is configured so that the wind speed is attenuated by being discharged to the outside only through the In this case, the wind speed attenuator may be configured to be fixedly mounted only to the air conditioner.
  • the wind speed attenuator may be configured to be detachably mounted on the outlet.
  • wind speed attenuator may be configured to be mounted by being fitted so that the frame is in contact with the inner circumferential surface of the outlet.
  • the wind speed attenuator may be configured to be mounted while covering the outlet in the housing of the air conditioner.
  • the wind speed attenuator may be configured to be mounted on the outside of the housing of the air conditioner while covering the outlet.
  • the frame has a height that does not contact the fine net when the discharge guide is fully opened.
  • the wind speed attenuator may be manufactured by insert injection molding of the frame together with the fine net.
  • the fine net when the pressure of the internal space formed by the frame and the fine net is equal to or greater than a predetermined pressure, at least a portion may be separated from the frame to be visible to the user.
  • a wind speed attenuator is a wind speed attenuator for reducing the wind speed of air discharged through the outlet by wrapping the outlet of the tower type air conditioner, and includes the outlet to cover a part of the air conditioner.
  • a cover body in the form of a pocket that can be removed, and having an opening formed in a portion corresponding to the outlet when a part of the air conditioner is covered; a fine net coupled while blocking the opening of the cover body; and tightening means for tightening the lower end of the cover body to closely contact the housing of the air conditioner when a part of the air conditioner is covered with the cover body, so that the fine net faces the discharge port.
  • the cover body preferably has a lower air permeability than the fine net.
  • the fine net may be made by overlapping one or two or more synthetic resin woven fabrics.
  • the number of meshes of the synthetic resin woven fabric is 50 to 300, or the air permeability of the synthetic resin woven fabric is 3000 to 30000 mm / s when measured in an area of 20 cm 2 in accordance with KS K ISO 9237 and a pressure condition of 200 Pa can
  • the wind speed attenuator of the present invention has a simple structure such as a fine net and a frame, and by simply mounting it on the outlet of the existing air conditioner, the existing convection type air conditioner can be made into a so-called windless air conditioner.
  • the discomfort caused by the strong wind of the air conditioner can be reduced and the spread of infectious diseases can be prevented.
  • the present invention may have various other effects, and these other effects of the present invention can be understood by the following description, and can be seen more clearly by the examples of the present invention.
  • FIG. 1 is a partially exploded, downward perspective view of a case in which a wind speed attenuator according to a first embodiment of the present invention is applied to a conventional ceiling-type air conditioner.
  • FIG. 2 is an upper perspective view showing a wind speed attenuator according to the first embodiment and a modified example thereof.
  • FIG. 3 is a partially exploded, downward perspective view of the case where the wind speed attenuator according to the second embodiment of the present invention is applied to the ceiling air conditioner of FIG. 1 .
  • FIG. 4 is a front exploded perspective view when the wind speed attenuator according to the third embodiment of the present invention is applied to a conventional tower-type air conditioner.
  • FIG. 5 is a bottom perspective view showing a wind speed attenuator according to a fourth embodiment of the present invention.
  • FIG. 6 is a front perspective view showing a wind speed attenuator according to a fifth embodiment of the present invention applicable to a conventional tower-type air conditioner.
  • each component or a specific part constituting the component is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Accordingly, the size of each component does not fully reflect the actual size. If it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, such description will be omitted.
  • the terms 'coupled', 'mounted', 'fixed' or 'connected' refer to the case where one member and another member are directly coupled, mounted, fixed or connected, as well as when one member engages an intermediate member. It also includes cases where it is indirectly coupled, mounted, fixed, or connected to another member through the intervening.
  • FIG. 1 is a partially exploded, downward perspective view of a case in which a wind speed attenuator according to a first embodiment of the present invention is applied to a conventional ceiling-type air conditioner
  • FIG. 2 is a wind speed attenuator according to the first embodiment and its modifications. It is an upper perspective view.
  • the wind speed attenuator according to the first embodiment is mounted on the ceiling type air conditioner 1 .
  • the wind speed attenuator of this embodiment is mounted on the outside of the housing 2 of the air conditioner, that is, the cover exposed to the ceiling while covering the outlet 3 of the air conditioner 1 .
  • the wind speed attenuator of this embodiment has a size and shape corresponding to the outlet 3 and has an open inside, and the outside of the housing 2 of the air conditioner, the outlet 3 )
  • a frame 10 that can be mounted on the outer periphery and a fine net 20 fixed while blocking the open portion of the frame 10 are provided.
  • the frame 10 may be made of a synthetic resin such as polyethylene or polypropylene. A portion of the frame 10 in contact with the outer surface of the air conditioner housing 2 may be flexible so that it can be in good contact even when the outer surface of the housing 2 has a curved surface. Alternatively, the frame 10 may be made of a relatively light metal plate such as aluminum. Even in this case, the portion of the frame 10 in contact with the outer surface of the air conditioner housing 2 may be formed to have a sufficiently thin thickness to easily follow and bend the outer surface shape of the housing 2 .
  • the frame 10 may be attached to the outside (outer surface) of the housing 2 along the outer periphery of the discharge port 3 by a double-sided adhesive tape 30 or an adhesive. Accordingly, the frame 10 may be mounted in close contact with the outside (outer surface) of the housing 2 at the outer periphery of the discharge port 3 .
  • the discharge guide 4 for controlling the wind direction by opening or closing or rotating the discharge port 3 may be provided.
  • the discharge guide 4 when the discharge guide 4 is maximally opened, it collides with the fine net 20 to be described later and the fine net 20 is torn or the rotation of the discharge guide 4 is suppressed by the fine net 20 and the discharge guide 4 ), side effects such as overloading the motor (not shown) for driving may occur. Therefore, in order to prevent this, it is preferable that the frame 10 has a height h or a thickness at which the discharge guide 4 does not directly contact the fine net when the discharge guide 4 is fully opened.
  • the fine net 20 blocks the opening of the frame 10, and as in this embodiment, when the frame 10 has the above-described height h, the side of the frame 10 that is not adhered to the housing 2 is fixed Therefore, as described above, when the discharge guide 4 is provided in the discharge port 3 , the discharge guide 4 does not come into contact with the fine net 20 even when the discharge guide 4 is fully opened.
  • the fine net 20 is a member serving as a wind speed attenuation in the present invention, and may be made of synthetic resin woven fabric such as Teflon (registered trademark), polyester such as PET, or nylon. That is, it can be manufactured by weaving synthetic fibers (filaments) made of polyester, nylon, etc. with weft and warp yarns.
  • the present invention is not limited by the material or manufacturing method of the fine net 20, and may be used by purchasing a commercially available product such as a dustproof net having the following physical properties. That is, in order for the fine net 20 to pass the air discharged through the discharge port 3 of the general air conditioner and reduce the wind speed to the extent that the user does not feel it as wind, the mesh number is, for example, 50 to 300.
  • the fine net 20 has an air permeability, for example, in accordance with KS K ISO 9237, an area of 20 cm 2 , preferably 3000 to 30000 mm/s when measured under a pressure condition of 200 Pa.
  • the fine net 20 may be used with only one sheet of synthetic resin woven fabric or by overlapping two or more sheets to satisfy these physical properties.
  • the fine net 20 and the frame 10 are made of a synthetic resin, and the melting point of the fine net 20 is higher than the temperature during injection molding of the frame 10, for example, the fine net 20 is made of PET.
  • the frame 10 is made of polyester or nylon and the frame 10 is made of polyethylene or polypropylene, the wind speed by insert injection molding in which the fine net 20 is placed in the injection molding mold of the frame 10 and the frame 10 is injection molded. Attenuators can be manufactured.
  • the frame 10 of the wind speed attenuator of this embodiment configured in this way is attached (adhesive in this embodiment) to the outer periphery of the outlet 3, the outlet of the air discharged to the outlet 3 is a fine net 20 ), and the wind speed is reduced to such an extent that it is not felt as wind to the user.
  • the wind speed attenuator is mounted on the outer periphery of the outlet ( 3 ) from the outside of the housing ( 2 ) by screws ( 31 ).
  • a flange portion 11a extending in the transverse direction is formed on the upper edge of the frame 11 .
  • adhesiveness between the frame 11 and the outer surface of the housing 2 may be improved by interposing a gasket (not shown) made of a material such as rubber or silicone.
  • the wind speed attenuator of the modified example shown in Fig. 2 (b) can be detachably mounted to the outlet. Therefore, it is possible to easily perform maintenance such as cleaning the wind speed attenuator by removing it if necessary.
  • the wind speed attenuator of this embodiment and the modified example shown in Figs. 2 (a) and (b) is mounted to correspond to each outlet 3 one by one
  • the wind speed attenuator shown in Fig. 2 (c) is A plurality of (four in the example shown in FIG. 1 ) may be mounted to cover all of the discharge ports 3 at once. That is, the wind speed attenuator shown in (c) of FIG. 2 is integrated by connecting the frames 10 and 11 of the individual wind speed attenuators shown in FIGS. 1 or 2 (a) and (b) through the connection part 12a. It is made of a frame (12), and a fine net (20) is arranged in a portion corresponding to each outlet (3).
  • FIG. 3 is a partially exploded, downward perspective view of the case where the wind speed attenuator according to the second embodiment of the present invention is applied to the ceiling air conditioner of FIG. 1 .
  • the difference between the wind speed attenuator of this embodiment and the wind speed attenuator of the first embodiment is that the outlet 3 is formed in the interior of the housing 2 of the ceiling type air conditioner, that is, the air conditioner frame 5 exposed after removing the cover. ') The point is that it is mounted on the inside or the outer periphery.
  • the frame 13 of the wind speed attenuator when mounted inside the discharge port 3' formed in the air conditioner frame 5, the frame 13 of the wind speed attenuator has the shape of the inner circumferential surface of the discharge port 3', as shown in FIG. is formed along In addition, a flange portion 13a extending in the transverse direction is formed on the lower edge of the frame 13, so that when the wind speed attenuator is inserted into the outlet 3' from the bottom to the upper side, it is caught around the outlet 3' and is suitable It can be inserted to the depth.
  • the wind speed attenuator according to the present embodiment does not necessarily need to be fixed so as not to fall down by a method such as adhesion, as in the first embodiment described above. This is when the wind speed attenuator is inserted in contact with the inner circumferential surface of the discharge port 3' and then the housing 2, that is, the flange portion 13a of the frame 13 is pressed with the cover to fix the cover to the conditioner frame 5. because it becomes
  • the wind speed attenuator is mounted inside the housing 2, it is not fitted on the inner circumferential surface of the outlet 3' as shown in FIG. may be In this case, the wind speed attenuator is fitted between the conditioner frame 5 (specifically, the outer periphery of the discharge port 3') and the housing 2 . Therefore, the frame 14 of the wind speed attenuator is preferably formed much thinner than the frame 13 of FIG. 3 (a). Also, in this case, after attaching the frame 14 to the position corresponding to the outlet 3' on the outer periphery of the outlet 3' or the inner surface of the housing 2 with double-sided adhesive tape 30 or an adhesive, attach the housing 2 It is preferable to couple to the conditioner frame (5).
  • the wind speed attenuator is mounted inside the housing 2 , so that it is not visible because it is obscured by the housing 2 , so it is aesthetically pleasing.
  • FIG 4 is a front exploded perspective view when the wind speed attenuator according to the third embodiment of the present invention is applied to a conventional tower-type (or stand-type) air conditioner 1'.
  • a wind speed attenuator according to a third embodiment will be described with reference to FIG. 4 .
  • the same and similar reference numerals are given to the same and similar components as those of the above-described first and second embodiments, and overlapping descriptions are omitted.
  • the wind speed attenuator of this embodiment is different from the wind speed attenuator of the first and second embodiments described above in that it is applied to the tower type (or stand type) air conditioner 1'.
  • the frame 10 of the wind speed attenuator is formed along the outer circumferential shape of the outlet 3 .
  • the fine net 20 is fixed to the side of the frame 10 that is not attached to the housing 2 while blocking the opening of the frame 10 .
  • the wind speed attenuator of this embodiment configured in this way may be mounted on the outer periphery of the outlet 3 from the outside of the housing 2 by the double-sided adhesive tape 30 .
  • the wind speed attenuator of this embodiment is substantially the same as the wind speed attenuator of the above-described first embodiment except for the size, shape, and mounting direction. Therefore, as in the first embodiment described above, when the discharge guide 4 for controlling the wind direction by opening/closing or rotating the discharge port 3 is provided, interference between the discharge guide 4 and the fine net 20 is avoided. for the thickness (corresponding to the height h of the frame 10 in the first embodiment described above).
  • the wind speed attenuator of this embodiment may be mounted on the outside of the housing 2 by an adhesive or screws 31 .
  • a wind speed attenuator may be mounted inside the housing 2 as in the second embodiment described with reference to FIG. 3 .
  • FIG. 5 is a bottom perspective view showing the wind speed attenuator according to the fourth embodiment mounted on the outlet 3 of the ceiling type air conditioner 1 shown in FIG. 1 , (a) is the wind speed attenuator of the fourth embodiment The mounted and used state, (b) shows a state in which a part (one side) of the fine net 20 ′ is separated from the frame 15 .
  • the mesh portion ( 22) is fixed to form a fine net 20', and the mesh frame 21 is coupled to the frame 15 of the wind speed attenuator by a fixing means such as a hinge 25.
  • the mesh portion 22 of this embodiment performs the same function as the fine net 20 of the above-described embodiments, that is, a wind speed attenuation function.
  • a ball plunger 21a protrudes with elasticity by a built-in spring (not shown) having a predetermined elastic modulus, and the ball plunger 21a A groove 15a into which the ball plunger 21a is inserted is formed on the inner circumferential surface of the frame 15 at a position corresponding to .
  • the fine net 20 ′ maintains a state coupled to the frame 15 as shown in FIG.
  • the air conditioner 1 is used for a long period of time, if dust or the like is attached to the mesh portion 22 of the fine net 20', the pressure in the internal space formed by the frame 15 and the fine net 20' rises.
  • the fixing force by the ball plunger 21a and the groove 15a is exceeded, and the fine net 20' is framed by the ball plunger 21a being separated from the groove 15a as shown in FIG. 5(b). (15), it can prevent overload of the fan drive motor.
  • the predetermined pressure at which the fine net 20 ′ is separated from the frame 15 that is, the fixing force can be set by appropriately selecting the elastic modulus of the built-in spring of the ball plunger 21a according to a prior experiment.
  • the user When the fine net 20' is separated from the frame 15 as shown in FIG. 5 (b), the user removes the fine net 20' or the entire wind speed attenuator by washing and removing the dust of the mesh part 22. Next, as shown in Fig. 5 (a), it can be re-installed and used.
  • the separation of the fine net 20' due to the increase in the pressure of the inner space is implemented with the ball plunger 21a and the groove 15a, but for example, the mesh frame 21 is framed with an appropriate elastic force. It may be implemented by means such as a hook fixed to (15).
  • this embodiment described with reference to FIG. 5 has been illustrated and described as another embodiment of the wind speed attenuator shown in FIG. It can also be applied to the wind speed attenuator, and further can be applied to the tower type air conditioner 1 ′ shown in FIG. 4 .
  • FIG. 6 is a front perspective view showing a wind speed attenuator according to a fifth embodiment.
  • the wind speed attenuator according to the present embodiment is applicable to the tower type air conditioner 1' shown in FIG. 4, and has the same shape as a cover surrounding the upper part including the outlet 3 of the air conditioner 1'. is done Specifically, the wind speed attenuator according to the present embodiment includes a cover body 16 , a fine net 20 and a tightening means 16a.
  • the fine net 20 may be coupled to the open portion of the cover body 16 in a manner such as adhesion, fusion, sewing, or the like.
  • the tightening means 16a is provided at the lower end of the cover body 16, and when the upper portion of the air conditioner 1' is covered with the cover body 16, the lower end of the cover body 16 is attached to the air conditioner 1'. ) and tighten it so that it adheres to the housing. Accordingly, the air discharged through the discharge port 3 is prevented from leaking between the lower end of the cover body 16 and the housing of the air conditioner 1 ′, and the air discharged from the discharge port 3 is transferred to the fine net 20 .
  • Specific examples of the tightening means 16a include a string, a rubber band, a snap button, and the like, as shown in FIG. 6 .
  • the present invention can be applied to an accessory device mounted on a discharge port of an air conditioner, such as a wind speed attenuator, and an air conditioner including the same.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

La présente invention concerne un atténuateur de la vitesse du vent, monté sur un orifice d'évacuation d'un dispositif de climatisation afin de réduire la vitesse du vent de l'air évacué à travers l'orifice d'évacuation, l'atténuateur comprenant : un cadre comportant une partie interne ouverte, et présentant une taille et une forme correspondant à l'orifice d'évacuation et pouvant être monté sur la partie circonférentielle externe ou sur la surface circonférentielle interne de l'orifice d'évacuation ; et un filet fin fixé à la partie ouverte du cadre et bloquant en même temps ladite partie ouverte, de sorte que, lorsque le cadre a été installé de façon à être en contact étroit avec la partie circonférentielle externe ou avec la surface circonférentielle interne de l'orifice d'évacuation, l'air évacué à travers l'orifice d'évacuation passe à travers le filet fin, ce qui permet de réduire la vitesse du vent. Le simple montage de l'atténuateur de la vitesse du vent de la présente invention sur un orifice d'évacuation d'un dispositif de climatisation existant permet l'utilisation du dispositif de climatisation existant comme dispositif de climatisation dit sans vent.
PCT/KR2022/003213 2021-03-10 2022-03-07 Atténuateur de vitesse de vent Ceased WO2022191552A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2021-0031211 2021-03-10
KR1020210031211A KR102295071B1 (ko) 2021-03-10 2021-03-10 풍속 감쇄기

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WO2022191552A1 true WO2022191552A1 (fr) 2022-09-15

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PCT/KR2022/003213 Ceased WO2022191552A1 (fr) 2021-03-10 2022-03-07 Atténuateur de vitesse de vent

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Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
KR102295071B1 (ko) * 2021-03-10 2021-08-26 정형일 풍속 감쇄기
CN117433064A (zh) * 2022-07-20 2024-01-23 大金工业株式会社 导风装置和环境调节系统

Citations (6)

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KR200218080Y1 (ko) * 2000-11-04 2001-03-15 현상숙 길이 조절이 가능한 벽걸이형 에어컨 커버
JP2001349603A (ja) * 2000-06-02 2001-12-21 Midori Anzen Co Ltd 緩流吹出構造及び空気清浄装置
JP2007155313A (ja) * 2005-11-09 2007-06-21 Shii I Shii:Kk インテリアカーテンダクト装置
KR101142188B1 (ko) * 2011-11-03 2012-05-15 김도영 에어컨용 에어넷
KR20130086896A (ko) * 2012-01-26 2013-08-05 김도영 에어컨용 윈드웨이
KR102295071B1 (ko) * 2021-03-10 2021-08-26 정형일 풍속 감쇄기

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Publication number Priority date Publication date Assignee Title
KR101698842B1 (ko) 2015-07-17 2017-01-23 삼성전자 주식회사 공기조화기 및 그 제어방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349603A (ja) * 2000-06-02 2001-12-21 Midori Anzen Co Ltd 緩流吹出構造及び空気清浄装置
KR200218080Y1 (ko) * 2000-11-04 2001-03-15 현상숙 길이 조절이 가능한 벽걸이형 에어컨 커버
JP2007155313A (ja) * 2005-11-09 2007-06-21 Shii I Shii:Kk インテリアカーテンダクト装置
KR101142188B1 (ko) * 2011-11-03 2012-05-15 김도영 에어컨용 에어넷
KR20130086896A (ko) * 2012-01-26 2013-08-05 김도영 에어컨용 윈드웨이
KR102295071B1 (ko) * 2021-03-10 2021-08-26 정형일 풍속 감쇄기

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