KR100533112B1 - Air-conditioning duct silencer on the railway vehicles - Google Patents
Air-conditioning duct silencer on the railway vehicles Download PDFInfo
- Publication number
- KR100533112B1 KR100533112B1 KR10-2004-0030892A KR20040030892A KR100533112B1 KR 100533112 B1 KR100533112 B1 KR 100533112B1 KR 20040030892 A KR20040030892 A KR 20040030892A KR 100533112 B1 KR100533112 B1 KR 100533112B1
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- air
- duct
- perforated plate
- noise
- air conditioner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0072—Means for cooling only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
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- 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
- F24F13/02—Ducting arrangements
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- 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
- F24F13/24—Means for preventing or suppressing noise
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H2001/006—Noise reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/30—Railway vehicles
-
- 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
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/242—Sound-absorbing material
-
- 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
- G10K2210/128—Vehicles
- G10K2210/1283—Trains, trams or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Fluid Mechanics (AREA)
- Duct Arrangements (AREA)
- Air-Conditioning For Vehicles (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
본 발명은 철도차량의 에어컨용 덕트에서 냉각된 공기와 함께 차내로 유입되는 소음을 덕트내부에서 흡수하여 제거할 수 있게 한 소음장치에 관한 것으로, 일정한 크기와 간격을 갖는 구멍이 천공된 타공판으로 구성되는 중간안내깃과 흡음재가 충진된 타공판으로 구성된 하부안내깃이 수직덕트와 수평덕트가 교차되는 지점에 배치되어 1차적으로 소음을 흡수하고 분배기의 상부에서 흡음재가 충진되는 타공판으로 구성된 스플리터에 의하여 2차적으로 흡수케하여 에어컨 덕트에서 유입되는 중·고주파수 소음은 물론 중·저주파수 소음까지 효율적으로 흡수케 하는 것을 특징으로 하는 것이다.The present invention relates to a silencer that is capable of absorbing and removing noise introduced into a vehicle together with air cooled in an air conditioner duct of a railroad car, and comprises a perforated plate having holes having a predetermined size and spacing. The lower guide blade consisting of the intermediate guide feather and the perforated plate filled with the sound absorbing material is disposed at the point where the vertical duct and the horizontal duct intersect, so as to primarily absorb the noise and the splitter consisting of the perforated plate filled with the sound absorbing material at the top of the distributor. By absorbing the car, it is characterized in that it efficiently absorbs the mid- and high-frequency noise flowing from the air conditioning duct, as well as the mid- and low-frequency noise.
Description
본 발명은 에어컨으로부터 발생하는 소음이 철도차량의 실내로 유입되는 것을 방지하기 위한 것으로 보다 상세하게 설명하자면 철도차량 즉, 지하철 전동차나 고속전철(KTX) 차량, 객차등과 같은 승객수송용 철도차량에는 통상 차량의 지붕에 탑재되는 에어컨에 의하여 냉각된 공기가 에어덕트를 통하여 실내로 유입되게 되어 있으며, 실내유입공기 중에는 에어컨에서 강제 송풍되는 빠른 흐름의 냉각공기와 에어덕트와의 마찰에 의한 소음과 에어컨 자체에서 발생하는 기계적 소음이 함께 유입되므로 이를 제거하기 위한 에어컨 에어덕트의 소음방지 구조에 관한 것이다.The present invention is to prevent the noise generated from the air conditioner to be introduced into the interior of the railway vehicle to be described in more detail in the railway vehicle, that is, passenger cars such as subway trains, high-speed trains (KTX) vehicles, passenger cars, etc. Normally, air cooled by an air conditioner mounted on the roof of a vehicle is introduced into the room through an air duct.In the indoor inflow air, noise caused by friction between the fast-flowing cooling air and the air duct forcedly blown from the air conditioner and the air conditioner are Since the mechanical noise generated by itself is introduced together, the noise prevention structure of the air duct air duct for removing it.
종래 철도차량 에어컨덕트는 도 1에서 도시된 것과 같이 중간안내깃(1)과 하부안내깃(2) 및 유입공기 분배기(3)로 구성하여 공기흐름을 원활하게 구성되어 있었으나, 별도의 소음저감 대책은 수립되어 있지 않았으며, 또 다른 선행기술로는 도 2에 도시된 것과 같이 공기유입구(5)를 2개의 중앙방음판(6)으로 분할구획하여 이들 각 공기유입구마다 에어컨을 연결하도록 되어 있으며 상기 각 공기유입구의 중앙방음판(6)과 측벽사이에는 다수개의 보조방음판(7)이 덕트의 중앙을 향하여 경사지게 설치되어 공기통로(8)를 다수개의 공기통로(8)로 분할함으로써, 공기의 흐름을 분산하여 공기의 집중유입에 따른 소음을 줄여주도록 되어 있는 한편, 상기 각 중앙방음판(6)은 다수개의 벤트가 형성되어 이 중앙방음판(6)을 거쳐 유입되는 공기가 와류를 일으키지 않토록 해주며 아울러 상기 다수개의 각 보조방음판(7)은 방진판(9)과 흡음판(10)으로 이루어져 공기와 충돌에 의한 소음을 줄여주는 동시에 에어컨 자체의 작동소음을 상기 흡음판 (10)이 흡수함으로써 소음이 차량의 실내로 유입되지 않토록 한 것이 등록실용신안 번호 20-149102호로 공지되어 있었으나, 상기의 구성 역시 소음 제거 효과가 미흡하다는 문제점이 있었다.Conventional railway vehicle air-conditioning duct was composed of the intermediate guide feather (1), lower guide feather (2) and the inlet air distributor (3) as shown in Figure 1, but the air flow was smoothly configured, but the additional noise reduction measures Is not established, and another prior art is to divide the air inlet (5) into two central sound insulation panel (6) as shown in Figure 2 to connect the air conditioner for each of these air inlet Between the central sound insulation plate 6 and the side wall of the air inlet, a plurality of auxiliary sound insulation plates 7 are inclined toward the center of the duct to divide the air passage 8 into a plurality of air passages 8 to distribute the flow of air. In order to reduce noise due to the concentrated inflow of air, each central soundproof plate 6 is formed with a plurality of vents so that the air flowing through the central soundproof plate 6 does not cause vortexing. In addition, each of the plurality of auxiliary sound insulation board 7 is composed of a vibration damping plate 9 and a sound absorbing plate 10 to reduce the noise caused by the collision with the air at the same time the sound absorbing plate 10 absorbs the operation noise of the air conditioner itself It is known that the registered model No. 20-149102 to prevent noise from entering the interior of the vehicle, but the above configuration also had a problem that the noise reduction effect is insufficient.
본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창안된 것으로 에어컨 덕트내의 공기유동소음과 에어컨 자체에서 발생되는 기계적 소음을 효과적으로 제거할 수 있는 철도차량용 에어컨 덕트를 제공하는 것을 목적으로 한다. An object of the present invention is to provide an air conditioner duct for a railway vehicle that can effectively remove the air flow noise in the air conditioner duct and mechanical noise generated in the air conditioner itself.
상기한 목적을 위한 본 발명 철도차량용 에어컨 덕트 소음기는 에어컨으로부터 에어덕트로 유입되는 공기는 타공판으로 구성된 중간안내깃과 흡음재가 충진된 타공판으로 구성된 하부안내깃에 의하여 1차적으로 소음이 저감되고, 차량실내로 냉각된 공기를 분배하는 유입공기분배기의 상부에는 역시 타공판과 흡음재로 구성된 스플리터를 형성하여 2차적으로 소음을 저감한다.Air conditioner duct silencer of the present invention for the above-described rail vehicle, the air introduced into the air duct from the air conditioner is primarily the noise is reduced by the lower guide vane consisting of the intermediate guide vane composed of the perforated plate and the perforated plate filled with sound absorbing material, the vehicle The upper part of the inlet air distributor for distributing the cooled air to the room also forms a splitter composed of a perforated plate and a sound absorbing material to reduce noise secondarily.
또한 유입공기분배기의 상부에 형성되는 스플리터는 유동공기의 압력손실을 적게하기 위하여 전면에는 반원형으로 형성한다.In addition, the splitter formed in the upper portion of the inlet air distributor is formed in a semicircular shape on the front side to reduce the pressure loss of the flow air.
이하 본 발명의 바람직한 실시 예를 첨부한 도면을 참조하여 상세하게 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명 철도차량용 에어컨 덕트 소음기의 단면도이고, 도 4는 도 3의 B-B선 단면도이며, 도 5는 본 발명의 타공된 중간안내깃(15) 및 타공된 하부 안내깃(14)의 사시도이다.3 is a cross-sectional view of the air conditioner duct silencer of the present invention railway vehicle, Figure 4 is a cross-sectional view taken along line BB of Figure 3, Figure 5 is a perspective view of the perforated intermediate guide vane 15 and the perforated lower guide vane 14 of the present invention to be.
도 3 내지 도 5에 도시한 바와 같이 본 발명에 의한 철도차량용 에어컨덕트 소음기는 차량의 지붕에 탑재된 에어컨(11)에서 차량의 내부로 냉각된 공기를 공급하는 수직으로 형성된 덕트(13)와 천정을 따라 길게 형성된 수평으로 형성된 덕트(13) 및 수평덕트에 일정간격으로 형성된 분배기(16)로 구성된 에어컨 덕트 시스템 내에 구비되어 있다.3 to 5, the air conditioner duct silencer for railroad cars according to the present invention is a vertically formed duct 13 and a ceiling for supplying air cooled from the air conditioner 11 mounted on the roof of the vehicle to the interior of the vehicle. It is provided in the air conditioning duct system consisting of a horizontally formed duct 13 formed along the lengthwise and a distributor 16 formed at regular intervals in the horizontal duct.
에어컨(11)에서 차량의 실내로 유입되는 유입공기(12)중에는 송풍팬(도면 미도시)에 의하여 빠른 흐름으로 덕트(13)를 통과하면서 통과과정에서 덕트와 유입공기의 마찰로 인하여 발생되는 소음과 에어컨 자체에서 발생하는 컴프레샤의 기계적 소음이나 팬의 공기역학적 소음이 함께 유입하게 된다.The noise generated by the friction between the duct and the intake air during the passage while passing through the duct 13 in a rapid flow by the blowing fan (not shown) is introduced into the vehicle interior from the air conditioner (11). The mechanical noise of the compressor and the aerodynamic noise of the fan are introduced together with the air conditioner itself.
따라서 에어컨 덕트 시스템 내부에는 에어컨으로부터 유입되는 소음을 효과적으로 흡수할 수 있도록 구성된다.Therefore, the air conditioner duct system is configured to effectively absorb the noise from the air conditioner.
에어컨 덕트(13)에는 유입공기(12)의 흐름을 원활하게 하여 압력손실을 감소시키면서 덕트(13)의 굴곡진 부분에서 와류를 일으키지 않토록 중간안내깃(15)과 하부안내깃(14)을 덕트의 수평부와 수직부가 교차되는 지점에 배치한다.The air conditioner duct 13 has an intermediate guide vane 15 and a lower guide vane 14 so as to smooth the flow of the inlet air 12 to reduce the pressure loss while not causing the vortex in the curved portion of the duct 13. Place at the point where the horizontal and vertical sections of the duct intersect.
중간안내깃(15)은 수직과 수평의 덕트(13)가 교차하는 통로의 가운데 부분에 일정한 크기와 규칙적인 간격을 가진 구멍이 형성된 타공판(17)을 유입공기(12)의 흐름에 맞추어 라운딩되게 구성한다.The intermediate guide feather 15 is rounded to match the flow of the inlet air 12 with the perforated plate 17 formed with holes having a constant size and regular intervals in the center portion of the passage where the vertical and horizontal ducts 13 intersect. Configure.
수직과 수평덕트(13)가 교차하는 모서리에는 유입공기의 흐름에 맞추어 라운딩된 타공판(17')을 표면부재로 하고 그 내부에는 흡음재(18)를 충진한 하부 안내깃(14)을 배치하여 에어컨(11)으로부터 유입되는 소음을 1차적으로 저감되도록 한다.At the corner where the vertical and horizontal ducts 13 intersect, the perforated plate 17 'rounded according to the flow of inlet air is used as a surface member, and the lower guide feather 14 filled with the sound absorbing material 18 is disposed therein. The noise flowing from (11) is to be primarily reduced.
수직과 수평덕트(13)가 교차되는 지점에서 1차적으로 소음이 저감된 유입공기(12)는 수평덕트(13)에 일정간격마다 구비되어 차량의 실내로 유입공기(12)를 배출하는 분배기(16)의 상부에 형성된 스플리터(19)에 의하여 2차적으로 소음이 저감 된다.The inlet air 12, the noise of which is primarily reduced at the point where the vertical and horizontal ducts 13 intersect, is provided in the horizontal duct 13 at regular intervals to distribute the inlet air 12 into the interior of the vehicle ( By the splitter 19 formed on the upper portion of the 16, the noise is reduced secondary.
스플리터(19)는 분배기의 상부에 구비되어 덕트(13)내의 유입공기(12)의 흐름을 좌ㆍ우로 분할되는 형태로 배치되며 그 표면부재는 타공판으로 형성되고 내부에는 흡읍재(18')가 충진된다.Splitter 19 is provided in the upper portion of the distributor is arranged in the form of dividing the flow of the inlet air 12 in the duct 13 to the left and right, the surface member is formed of a perforated plate and inside the suction member 18 ' It is filled.
또한 스플리터(19)의 전면, 즉 유입공기의 유입방향으로는 유입공기의 압력손실을 감소시키기 위하여 반원형으로 라운딩된 형상으로 구성되며 덕트(13)를 따라 길게 형성되어 중ㆍ고주파수의 소음이 스플리터(19)에 의하여 감쇄되도록 구성된다.In addition, the front of the splitter 19, that is, in the inflow direction of the inlet air is composed of a rounded shape in a semi-circular shape to reduce the pressure loss of the inlet air, and is formed along the duct 13 to form a noise of the mid / high frequency splitter ( 19) to be attenuated.
스플리터(19)의 반원형으로 라운딩된 부분도 타공판(17"")으로 구성되며, 라운딩된 뒷부분의 스플리터의 수직 부분도 타공판(17"')으로 구성되어 있다.The semicircular rounded portion of the splitter 19 is also constituted by the perforated plate 17 "", and the vertical part of the rounded rear part splitter is also comprised by the perforated plate 17 "'.
스플리터(19)는 통상 분배기(16)에 좌ㆍ우방향으로 형성된 분배공에 각각 하나의 스플리터(19)를 형성할 수 있으나 분배공마다 하나이상으로 분할된 스플리터 (19)를 구비할 수 있으며 분할된 스플리터 사이에는 유입공기(12)가 원활하게 유동할 수 있도록 일정간격을 유지하여야 한다.The splitter 19 may generally have one splitter 19 in each of the distribution holes formed in the distributor 16 in the left and right directions, but may include a splitter 19 divided into one or more splitter holes per distribution hole. Between the splitters to maintain a constant interval so that the inlet air 12 flows smoothly.
이상에서 설명한 바와 같이 본 발명에 따른 철도차량용 에어컨 덕트 소음기는 에어컨에서 유입되는 냉각된 공기가 에어덕트를 통과하는 과정에서 타공판과 흡음재로 구성된 안내깃에 의하여 소음을 1차적으로 흡수 감쇄하고 분배기의 상부에 구비된 스플리터에 의하여 소음을 2차적으로 흡수 감쇄케하여 철도차량의 실내소음을 현저하게 줄일 수 있어 차량의 고급화를 도모할 수 있게 하는 효과가 있다.As described above, the air conditioner duct silencer for a railway vehicle according to the present invention primarily absorbs and attenuates noise by a guide vane composed of a perforated plate and a sound absorbing material in the course of passing the air duct from the cooled air flowing from the air conditioner, and the upper portion of the distributor. By the splitter provided in the secondary to absorb and attenuate the noise to reduce the indoor noise of the railway vehicle significantly, there is an effect that can improve the quality of the vehicle.
도 1은 종래 철도차량용 에어컨덕트에 대한 측단면도(a)와 측단면도의 A-A선 단면도(b)이다.1 is a side cross-sectional view (a) and a cross-sectional view taken along the line A-A of the conventional air conditioner duct for a railway vehicle (b).
도 2는 종래 또 다른 철도차량용 에어컨덕트에 대한 조립단면도(a)와 보조방음판의 단면도(b)이다.2 is a cross-sectional view (a) and a cross-sectional view (b) of an auxiliary sound insulation board for another conventional air conditioner duct for a railway vehicle.
도 3은 본 발명 철도차량용 에어컨덕트 소음기의 단면도이다.3 is a cross-sectional view of the air conditioner duct silencer for the present invention railway vehicle.
도 4는 도 3의 B-B선 단면도이다.4 is a cross-sectional view taken along the line B-B in FIG.
도 5는 타공된 중간안내깃 및 타공된 안내깃의 사시도이다.5 is a perspective view of the perforated intermediate guide feather and the perforated guide feather.
§ 도면의 주요부분에 대한 부호의 설명 §§ Explanation of symbols on the main parts of the drawings.
1. 중간안내깃 2. 하부안내깃1. Intermediate guide feather 2. Lower guide feather
3. 분배기 5. 공기유입구3. Dispenser 5. Air Inlet
6. 중앙방음판 7. 보조방음판6. Central sound insulation board 7. Secondary sound insulation board
8. 공기통로 9. 방진판8. Air passage 9. Dustproof plate
10. 흡음판 11. 에어컨10. Sound absorption plate 11. Air conditioner
12. 유입공기 13. 덕트12. Inlet air 13. Duct
14. 하부안내깃 15. 중간안내깃14. Lower guide feather 15. Intermediate guide feather
16. 분배기 17, 17', 17", 17"', 17"". 타공판16. Dispenser 17, 17 ', 17 ", 17"', 17 "". Perforated plate
18, 18'. 흡음재 19. 스플리터18, 18 '. Sound absorbing material 19. Splitter
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-0030892A KR100533112B1 (en) | 2004-05-03 | 2004-05-03 | Air-conditioning duct silencer on the railway vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-0030892A KR100533112B1 (en) | 2004-05-03 | 2004-05-03 | Air-conditioning duct silencer on the railway vehicles |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20-2004-0012308U Division KR200357548Y1 (en) | 2004-05-03 | 2004-05-03 | Air-conditioning duct silencer on the railway vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20050105670A KR20050105670A (en) | 2005-11-08 |
| KR100533112B1 true KR100533112B1 (en) | 2005-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2004-0030892A KR100533112B1 (en) | 2004-05-03 | 2004-05-03 | Air-conditioning duct silencer on the railway vehicles |
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| KR (1) | KR100533112B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101219678B1 (en) * | 2010-02-09 | 2013-01-08 | 엔알텍주식회사 | Silencer of duct for air conditioner of train |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101312387B1 (en) * | 2011-04-18 | 2013-09-27 | 엔알텍주식회사 | Silencer of duct for air conditioner of train |
| CN106004896B (en) * | 2016-06-29 | 2018-06-26 | 中车南京浦镇车辆有限公司 | Track traffic vehicle drivers' cab wind channel structure |
| CN111559398B (en) * | 2020-05-20 | 2021-06-22 | 安徽浦进轨道装备有限公司 | Noise elimination structure of air supply duct of railway vehicle |
-
2004
- 2004-05-03 KR KR10-2004-0030892A patent/KR100533112B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101219678B1 (en) * | 2010-02-09 | 2013-01-08 | 엔알텍주식회사 | Silencer of duct for air conditioner of train |
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| KR20050105670A (en) | 2005-11-08 |
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