CN113928358A - Low-noise air conditioner air duct of railway passenger car - Google Patents
Low-noise air conditioner air duct of railway passenger car Download PDFInfo
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- CN113928358A CN113928358A CN202111306128.7A CN202111306128A CN113928358A CN 113928358 A CN113928358 A CN 113928358A CN 202111306128 A CN202111306128 A CN 202111306128A CN 113928358 A CN113928358 A CN 113928358A
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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
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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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
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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
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
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Abstract
The invention discloses a low-noise air conditioning duct of a railway passenger car, which comprises an air conditioner return air inlet (3), an air conditioner air supply outlet (2), an air supply channel and a return air channel (11), wherein the air conditioner air supply outlet is connected with the air supply channel, a silencer (7) is arranged in the air supply channel below the air conditioner air supply outlet, and the silencer comprises a left arc plate (701) and a right arc plate (702); the adjacent sides of the left arc plate and the right arc plate are connected into a whole, and the opposite sides respectively extend towards one end of the air supply channel in an arc shape; two ends of the left arc plate and the right arc plate are respectively sealed by reinforcing rib plates (704), so that the left arc plate, the right arc plate, the air supply channel bottom plate and the reinforcing rib plates at the two ends are surrounded to form a sound absorption cavity; sound absorption micropores (03) are uniformly distributed on the left circular arc plate and the right circular arc plate respectively, and sound absorption cotton used for absorbing noise of the air conditioning unit is filled in the sound absorption cavity. The invention is convenient to process and greatly improves the riding comfort of passengers in a passenger room.
Description
Technical Field
The invention relates to ventilation equipment of a railway passenger car, in particular to a low-noise air conditioning duct of the railway passenger car.
Background
The air-conditioning ventilation system is an indispensable component of a passenger room of a rail transit vehicle, and the quality of the performance of the air-conditioning ventilation system directly influences the riding comfort of passengers. The noise of an air conditioner ventilation system is reduced, and the air supply uniformity of an air conditioner air duct is improved, which is always the key point of the professional research of heating and ventilation design.
At present, because the internal space of a rail transit vehicle is limited, the distance between an air conditioning air duct and an air outlet top plate of a passenger room is very short, and the noise of an air conditioning unit is easily transmitted into the passenger room. Aiming at the problem that the noise of the air-conditioning air duct transmitted into the passenger room is large, the commonly adopted mode is to stick sound-absorbing cotton inside the air-conditioning air duct. However, the sound-absorbing cotton in the air conditioning duct only has a good effect of absorbing high-frequency noise, and since the main noise sources of the air conditioning unit are a compressor, a condensing fan, an evaporating fan, and the like, and most of the noise emitted therefrom is low-frequency noise, a new noise reduction method is required to reduce the low-frequency noise of the air conditioning unit.
Chinese patent CN111361582B discloses a low-noise air supply channel for railway vehicles, which can achieve the purpose of absorbing noise by attaching a silk-level micro-perforated plate on the windward side inside the air channel. However, this solution requires a certain air gap between the micro-perforated plate and the windward side of the air duct to ensure the absorption effect, which makes the air duct more difficult to manufacture.
Disclosure of Invention
The invention aims to solve the technical problem of providing a low-noise air-conditioning duct of a railway passenger car, which is convenient to process and can effectively absorb low-frequency noise of an air-conditioning unit, aiming at the defect that the noise of the existing overhead air-conditioning unit is very easy to transmit into a passenger room.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a railway passenger train low noise air conditioner wind channel, includes air conditioner return air inlet, air conditioner supply-air outlet, air supply passageway and return air passageway, the air conditioner supply-air outlet is connected air supply passageway, air supply passageway includes the edge air supply passageway vertically arranges dynamic pressure wind channel and static pressure wind channel side by side, dynamic pressure wind channel with static pressure wind channel is through the ventilation hole intercommunication, the air conditioner return air inlet is connected return air passageway, its structural feature lies in:
a silencer is arranged in the dynamic pressure air duct below the air-conditioning air supply outlet, and comprises a left arc plate and a right arc plate; the adjacent sides of the left arc plate and the right arc plate are connected into a whole, and the opposite sides respectively extend towards one end of the air supply channel in an arc shape; the two ends of the left arc plate and the right arc plate are respectively sealed by reinforcing rib plates, so that the left arc plate, the right arc plate, the air supply channel bottom plate and the reinforcing rib plates at the two ends are surrounded to form a sound absorption cavity; sound-absorbing micropores are uniformly distributed on the left circular arc plate and the right circular arc plate respectively, and sound-absorbing cotton used for absorbing noise of the air conditioning unit is filled in the sound-absorbing cavity.
According to the invention, the silencer is arranged at the inlet of the air supply channel, so that on one hand, the air guide function is realized by the left arc plate and the right arc plate which extend towards the two ends of the air supply channel in an arc shape, the air channel resistance is reduced, and the pressure head and the noise of the evaporation fan are reduced, and on the other hand, the low-frequency noise and the vortex noise generated by air supply of the air conditioning unit can be absorbed by the sound absorption micropores and the sound absorption cotton arranged on the silencer. In addition, the silencer is convenient to process and install, and facilitates production and installation of the low-noise air-conditioning air supply duct of the railway passenger car.
Preferably, the bottom plate of the static pressure air duct is provided with air duct air supply holes which are arranged in a staggered manner with the vent holes, and the static pressure air duct is communicated with a perforated plate air supply area at the top of the passenger room through the air duct air supply holes, so that an air supply channel forms a multi-layer air supply structure, the air supply uniformity is improved, the path of noise transmission is prolonged, and a better noise reduction effect is generated.
Preferably, a splitter plate is installed below the air duct air supply hole to guide the air flow sent out by the air duct air supply hole to the periphery.
Preferably, the flow distribution plate is of an axisymmetric structure, the mounting seat, the horizontal flow distribution part and the inclined flow distribution part are sequentially arranged from outside to inside, and airflow gaps are formed between the horizontal flow distribution part and the inclined flow distribution part and the air duct air supply hole. Through the setting of slope reposition of redundant personnel portion, slowed down the air current velocity of flow, avoided the air current to strike the regional bottom plate of perforated plate air supply at passenger room top with higher speed and cause the air current noise.
Preferably, the connection side of the two inclined flow-dividing parts is arched upwards in an arc shape, and a porous structure is respectively arranged on each inclined flow-dividing part. The porous structure comprises a plurality of shunting holes distributed in a certain shape, and each shunting hole is obliquely arranged relative to the air supply direction of the air duct air supply hole. Through the porous structure and the inclined arrangement of the air supply direction of the shunting holes relative to the air supply holes of the air duct, the air flow impact and air supply resistance at the position is released, the air supply uniformity of the air duct is improved, the air flow impact noise is reduced, and a comfortable and low-noise riding environment is provided for a passenger room.
Preferably, a waste exhaust fan and a waste exhaust duct are arranged in the air conditioning unit, a multilayer sound insulation and noise reduction structure is arranged on a bottom plate of the air conditioning unit, a labyrinth noise reduction structure is arranged at a waste exhaust air inlet of the waste exhaust duct, an inlet of the labyrinth noise reduction structure is communicated with the passenger room, and an outlet of the labyrinth noise reduction structure is connected with the waste exhaust air inlet; the multilayer sound insulation and noise reduction structure comprises damping adhesive cement, sound absorption cotton, a sound insulation felt and a fixing plate, wherein the damping adhesive cement, the sound absorption cotton and the sound insulation felt are sequentially laid on a bottom plate of the air conditioning unit, and the fixing plate is fixedly connected to the air conditioning unit.
Therefore, the invention can reduce the vibration and noise of the compressor, the exhaust fan, the evaporation fan and the condensation fan which are main noise sources of the air conditioning unit through the multilayer sound insulation and noise reduction structure, thereby greatly improving the riding comfort of passengers in a passenger room. Meanwhile, the labyrinth silencing structure is arranged at the waste exhaust air inlet of the waste exhaust duct, so that on one hand, the transmission path of the noise of the waste exhaust fan transmitted into the passenger room is prolonged, the noise of the waste exhaust fan is prevented from being directly transmitted into the passenger room, on the other hand, the noise of the waste exhaust fan is isolated, and the noise of the waste exhaust airflow is absorbed.
Preferably, the labyrinth sound-deadening structure is a labyrinth-like structure formed by arranging a series of sound-deadening plates.
Preferably, the acoustical panel includes the main part of L type, the upper end butt of main part air conditioning unit bottom plate, the lower extreme is fixed the upper surface in air conditioner wind channel, just the main part be close to waste exhaust fan side and set up the sound insulation felt that is used for keeping apart waste exhaust fan noise, keep away from waste exhaust fan side and set up the sound of inhaling that is used for absorbing waste exhaust flow noise cotton.
Preferably, the windward side of the exhaust duct is provided with a sound-absorbing and noise-reducing structure to further absorb the airflow noise of the exhaust.
Preferably, inhale the sound and fall the structure of making an uproar and include that the micropore board on inhaling the sound cotton and the cladding that set up on the windward side of useless exhaust airway is cotton, just the micropore board is fixed on the useless exhaust airway, make the micropore board with form useless sound absorption chamber between the windward side of useless exhaust airway to increase the low frequency sound absorption effect of useless exhaust airway.
Preferably, the tail end of the return air channel is provided with a return air branch pipe, and an air inlet of the return air branch pipe is arranged in the bottom area of the passenger room seat, so that the distance between the air inlet of the return air channel and the return air inlet of the air conditioner is far, and the noise generated by the air conditioner unit can be eliminated through the return air channel.
Compared with the prior art, the invention has the beneficial effects that:
1. the silencer is arranged below the air supply outlet of the air conditioner (at the inlet of the air supply channel) to play a role in guiding air, so that the resistance of an air channel is reduced, the pressure head and the noise of the evaporation fan are reduced, and the eddy noise at the position can be reduced.
2. The invention installs the splitter plate under the air supply hole of the air duct at the bottom of the air supply channel, which not only ensures the uniform diffusion of the air flow output by the air supply hole of the air duct, but also reduces the air duct resistance and the air flow impact noise.
3. The air-conditioning return air inlet extends to the bottom area of the passenger room seat through the longer return air branch pipe, and the long-distance return air channel prevents noise of an air conditioning unit from entering the passenger room through the return air inlet.
4. The ventilation holes between the dynamic and static pressure air channels in the air supply channel and the air channel air supply holes at the bottom of the static pressure air channel are arranged in a staggered manner, so that the noise transmission path of the air conditioning unit is prolonged, the noise transmitted into a passenger room by the air supply channel is reduced, and the riding comfort of passengers in the passenger room is greatly improved.
5. The multi-layer sound insulation and noise reduction structure is arranged on the bottom plate of the air conditioning unit, so that the vibration and noise of the main noise sources of the air conditioning unit, namely the compressor, the exhaust fan, the evaporation fan and the condensation fan, are reduced, the noise transmitted into a passenger room by the air conditioning unit through the bottom plate of the air conditioning unit can be greatly reduced, and the riding comfort of passengers in the passenger room is greatly improved.
6. The invention arranges the labyrinth silencing structure at the waste exhaust air inlet, on one hand, the invention prolongs the transmission path of the noise of the waste exhaust fan transmitted into the passenger room, avoids the noise of the waste exhaust fan directly transmitted into the passenger room, on the other hand, the invention isolates the noise of the waste exhaust fan (about 3 dBA) and absorbs the noise of the waste exhaust air flow.
In a word, the air conditioning ventilation system provided by the invention not only improves the uniformity of airflow organization of the passenger room, but also reduces the noise in the passenger room (the noise is reduced by 3-4 dBA, which is equivalent to that when two air conditioning units run simultaneously, the structure of the invention is adopted, the noise of the air conditioning system is only one half of the original noise), and the riding comfort of passengers in the passenger room is integrally improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a low-noise air conditioning duct of a railway passenger car according to the present invention;
FIG. 2 is a cross-sectional view of a low noise air conditioning duct of a railway car in accordance with the present invention;
FIG. 3 is a front view of an air conditioning duct of the present invention;
FIG. 4 is a rear view of the air conditioning duct of the present invention;
FIG. 5 is a schematic view of the internal structure of the air conditioning duct according to the present invention;
FIG. 6 is a schematic view of the construction of the manifold of the present invention;
FIG. 7 is a schematic view of the muffler of the present invention;
FIG. 8 is a schematic view of a labyrinth silencing structure according to the invention;
FIG. 9 is a schematic structural view of the acoustical panel of the present invention;
FIG. 10 is a schematic view of a multi-layer sound insulation and noise reduction structure under a bottom plate of an air conditioning unit according to the present invention.
In the figure: 1-air conditioning air duct, 11-air return channel, 111-air return branch pipe, 12-dynamic pressure air duct, 13-static pressure air duct, 14-air return partition plate, 15-air supply partition plate, 151-arc flow guide plate, 152-air vent, 16-air duct air supply hole, 17-dynamic pressure spoiler, 18-static pressure spoiler, 2-air conditioning air supply hole, 3-air conditioning air return opening, 4-labyrinth silencing structure, 41-silencing plate, 411-main body, 412-sound absorbing cotton, 413-sound insulating felt, 5-flow distribution plate, 501-porous structure, 502-mounting seat, 503-rivet hole, 504-horizontal flow distribution part, 505-inclined flow distribution part, 6-air conditioning unit, 61-evaporator, 62-evaporation fan, 63-pressure wave pressure valve, 64-compressor, 65-condenser, 66-condensing fan, 67-waste exhaust fan, 68-waste exhaust duct, 69-air conditioning unit bottom plate, 691-damping adhesive cement, 692-sound-absorbing cotton, 693-sound-insulating felt, 694-fixing plate, 695-rivet, 7-silencer, 701-left circular arc plate, 702-right circular arc plate, 703-sound-absorbing micropore and 704-reinforcing rib plate.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.
As shown in fig. 1 and 2, one embodiment of the low-noise air conditioning duct of the railway passenger car comprises a 1-air conditioning duct, a 2-air conditioning air supply outlet, a 3-air conditioning return air inlet, a 4-labyrinth silencing structure, a 5-splitter plate, a 6-air conditioning unit and a 7-silencer.
As shown in fig. 3 to 5, the air-conditioning duct 1 includes a supply air channel and a return air channel 11 arranged in parallel. The air supply channel comprises a dynamic pressure air channel 12 and a static pressure air channel 13 which are longitudinally arranged in parallel along the air supply channel, the dynamic pressure air channel 12 and the static pressure air channel 13 are separated by an air supply partition plate 15 and are communicated through a waist-shaped vent hole 152 arranged on the air supply partition plate 15, an air channel air supply hole 16 which is arranged in a staggered mode with the vent hole 152 is arranged on the bottom plate of the static pressure air channel 13, and the static pressure air channel 13 is communicated with a perforated plate air supply area at the top of the passenger room through the air channel air supply hole 16.
The front end of the dynamic pressure air duct 12 is connected with the air-conditioning air supply outlet 2, and the front end of the return air channel 11 is connected with the air-conditioning return air inlet 3.
And a flow distribution plate 5 is arranged below the air duct air supply hole 16. As shown in fig. 6, the flow dividing plate 5 has an axisymmetrical structure, and includes, in order from outside to inside, a mounting seat 502, a horizontal flow dividing portion 504, and an inclined flow dividing portion 505, and airflow gaps are provided between the horizontal flow dividing portion 504 and the inclined flow dividing portion 505 and the duct air blowing holes 16. The two mounting seats 502 are respectively provided with rivet holes 503, and during mounting, the flow distribution plate 5 is connected with the bottom plate of the static pressure air duct 13 through rivets penetrating through the rivet holes 503. The connecting side of the two inclined flow-splitting parts 505 is arched upwards in an arc shape, and a porous structure 501 is respectively arranged on each inclined flow-splitting part 505, the porous structure 501 comprises a plurality of flow-splitting holes distributed in a certain shape (such as a circle), and each flow-splitting hole is obliquely arranged relative to the air supply direction of the air duct air supply hole 16. Therefore, airflow sent out by the air duct air supply holes 16 is guided to the periphery from the diversion gap between the diversion plate 5 and the air duct air supply holes 16 and the diversion holes, air supply uniformity of the air duct is improved, meanwhile, airflow impact and air supply resistance at the position can be released by the horizontal diversion part 504, the inclined diversion part 505 and the diversion holes of the porous structure 501 on the diversion plate 5, airflow impact noise is reduced, and a comfortable and low-noise riding environment is provided for a passenger room.
The tail end of the return air channel 11 is provided with a series of return air branch pipes 111, and the air inlets of the return air branch pipes 111 are arranged in the bottom area of the seats of the passenger rooms and are far away from the return air inlets of the air conditioning units, so that the return air channel 11 and the return air branch pipes 111 can sufficiently eliminate noise generated by the air conditioning units.
As shown in fig. 2, an evaporation cavity, a condensation cavity and a waste exhaust cavity are arranged in the air conditioning unit 6, an evaporator 61 and an evaporation fan 62 are installed in the evaporation cavity, a condenser 65 and a condensation fan 66 are installed in the condensation cavity, a waste exhaust fan 67 and a waste exhaust duct 68 are installed in the waste exhaust cavity, and the waste exhaust fan 67 is connected with the waste exhaust duct 68. The air conditioning unit 6 is arranged on an air conditioning air supply outlet 2 and an air conditioning return air inlet 3 of the air conditioning air duct 1, and the evaporation cavity is communicated with the air conditioning air supply outlet 2 and the air conditioning return air inlet 3. And a multilayer sound insulation and noise reduction structure is arranged below an air conditioning unit bottom plate 69 of the air conditioning unit 6, and a silencer 7 is arranged at the air conditioning air supply outlet 2.
As shown in fig. 7, the silencer 7 includes a left arc plate 701 and a right arc plate 702. The adjacent sides of the left arc plate 701 and the right arc plate 702 are connected into a whole, and the opposite back sides extend in an arc shape towards the two ends of the dynamic pressure air duct 12 respectively so as to play a role in guiding air flow, so that on one hand, air duct resistance is reduced, and therefore, the pressure head and noise of the evaporation fan 62 are reduced, and on the other hand, eddy noise at the position can be reduced. Two ends of the left arc plate 701 and the right arc plate 702 are respectively sealed by reinforcing rib plates 704, so that the left arc plate 701, the right arc plate 702, the dynamic pressure air duct bottom plate and the reinforcing rib plates 704 at the two ends are surrounded to form a sound absorbing cavity. Sound micropores 703 are inhaled to the equipartition respectively on left side circular arc board 701 and the right circular arc board 702, just the sound absorption intracavity is filled the thick sound cotton of inhaling that is used for absorbing the low frequency noise of thickness to increase the noise absorption effect of muffler 7 to the air supply noise and the vortex noise of air conditioning unit 6.
As shown in fig. 8, the waste air exhaust inlet of the waste air exhaust duct 68 is arranged between the air conditioning unit bottom plate 69 and the air conditioning duct 1, and the labyrinth silencing structure 4 is arranged at the waste air exhaust inlet. The labyrinth silencing structure 4 is a labyrinth air inlet structure formed by arranging more than ten silencing plates 41. The labyrinth silencing structure 4 prolongs the noise transmission path of the exhaust fan 67, and prevents the noise of the exhaust fan from directly transmitting into the passenger room.
As shown in fig. 9, the sound-absorbing plate 41 includes a main body 411 made of an L-shaped aluminum plate, the upper end of the main body 411 is abutted against the air conditioning unit bottom plate 69, the lower end is riveted to the upper surface of the air conditioning duct 1, a sound-absorbing felt 413 is attached to the side of the main body 411 close to the waste air blower, and a sound-absorbing cotton 412 is attached to the side far from the waste air blower. Thus, the noise of the exhaust fan 67 can be prevented from being transmitted through the soundproof felt 413, and the noise of the air flow can be absorbed through the sound-absorbing cotton 412, so that a comfortable and low-noise riding environment can be provided for the passenger compartment.
The windward side of the exhaust duct 68 is provided with a sound-absorbing and noise-reducing structure. The sound absorption and noise reduction structure is characterized in that sound absorption cotton is attached to the windward surface of the waste exhaust duct 68 and is coated by a microporous plate, and the microporous plate is riveted and fixed on the wall surface of the waste exhaust duct 68 to form a waste exhaust sound absorption cavity and increase the low-frequency sound absorption effect of the waste exhaust duct 68.
As shown in fig. 10, the multi-layer sound insulation and noise reduction structure includes a damping adhesive cement 691, a sound absorbing cotton 692, a sound insulation felt 693 and a fixing plate 694 which are sequentially arranged on the lower surface of the bottom plate 69 of the air conditioning unit, and the fixing plate 694 is fixedly mounted on the frame of the air conditioning unit 6 through rivets 695 to support the whole noise reduction structure. During the specific setting, at the lower surface of air conditioning unit bottom plate 69 spraying damping adhesive cement 691 earlier, then paste and inhale sound cotton 692, arrange sound insulation felt 693 at the back of inhaling sound cotton 692 next, through installing the whole noise-attenuating structure of fixed plate 694 bearing below sound insulation felt 693 at last. The multilayer sound insulation and noise reduction structure can reduce the vibration of the compressor 64, the exhaust fan 67, the evaporation fan 62 and the condensation fan 66 on one hand, and can isolate and absorb the noise generated by the compressor 64, the exhaust fan 67, the evaporation fan 62 and the condensation fan on the other hand.
When the multi-layer air supply structure is used, airflow sent by an evaporation fan 62 of an air conditioning unit 6 is guided by a silencer 7, enters a dynamic pressure air duct 12 for diffusion, enters a static pressure air duct 13 for further diffusion through a waist-shaped vent hole 152, and is sent into a perforated plate air supply area at the top of a passenger room through an air duct air supply hole 16 and a splitter plate 5 which are arranged in a staggered mode with the waist-shaped vent hole 152, so that the air supply uniformity is improved, the noise transmission path is prolonged, and a good noise reduction effect is generated. Meanwhile, the exhaust fan 67 absorbs the excess gas in the chamber through the exhaust duct 68 and the labyrinth silencing structure 4 arranged at the exhaust air inlet, and discharges the gas outside the vehicle.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (7)
1. A low-noise air-conditioning air duct of a railway passenger car comprises an air-conditioning air return inlet (3), an air-conditioning air supply outlet (2), an air supply channel and an air return channel (11), wherein the air-conditioning air supply outlet is connected with the air supply channel, the air supply channel comprises a dynamic pressure air duct (12) and a static pressure air duct (13) which are longitudinally arranged in parallel along the air supply channel, the dynamic pressure air duct is communicated with the static pressure air duct through an air vent, and the air-conditioning air return inlet is connected with the air return channel; the adjacent sides of the left arc plate and the right arc plate are connected into a whole, and the opposite sides respectively extend towards one end of the air supply channel in an arc shape; two ends of the left arc plate and the right arc plate are respectively sealed by reinforcing rib plates (704), so that the left arc plate, the right arc plate, the air supply channel bottom plate and the reinforcing rib plates at the two ends are surrounded to form a sound absorption cavity; sound-absorbing micropores (703) are uniformly distributed on the left circular arc plate and the right circular arc plate respectively, and sound-absorbing cotton used for absorbing noise of the air conditioning unit is filled in the sound-absorbing cavity.
2. The air duct of low-noise air conditioner of railway passenger car according to claim 1, characterized in that the bottom plate of the static pressure air duct is provided with air duct air supply holes (16) which are arranged in a staggered manner with the vent holes, and the static pressure air duct is communicated with a perforated plate air supply area at the top of the passenger room through the air duct air supply holes.
3. The air conditioning duct of low noise of railway passenger car according to claim 2, characterized in that a splitter plate (5) is installed under the air supply hole of the duct.
4. The air duct of claim 3, wherein the splitter plate is of an axisymmetric structure, the installation seat (502), the horizontal splitter portion (504) and the inclined splitter portion (505) are sequentially arranged from outside to inside, and air flow gaps are arranged between the horizontal splitter portion and the inclined splitter portion and the air duct blowing holes.
5. The air duct according to claim 4, wherein the interconnecting sides of the two oblique flow-dividing portions are arched upward in an arc shape, and a porous structure (501) is provided on each oblique flow-dividing portion.
6. The air duct according to claim 5, wherein the porous structure comprises a plurality of branch holes distributed in a certain shape, and each branch hole is arranged obliquely with respect to the air supply direction of the air duct supply hole.
7. The railway passenger car low-noise air conditioning duct as claimed in claim 1, wherein a return air branch pipe (111) is arranged at the tail end of the return air channel, and an air inlet of the return air branch pipe is arranged at the bottom area of the passenger room seat.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306128.7A CN113928358A (en) | 2021-11-05 | 2021-11-05 | Low-noise air conditioner air duct of railway passenger car |
| PCT/CN2022/104032 WO2023077849A1 (en) | 2021-11-05 | 2022-07-06 | Low-noise air-conditioning air duct for railway passanger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306128.7A CN113928358A (en) | 2021-11-05 | 2021-11-05 | Low-noise air conditioner air duct of railway passenger car |
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| CN113928358A true CN113928358A (en) | 2022-01-14 |
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| CN202111306128.7A Pending CN113928358A (en) | 2021-11-05 | 2021-11-05 | Low-noise air conditioner air duct of railway passenger car |
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| WO (1) | WO2023077849A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526157A (en) * | 2022-01-25 | 2022-05-24 | 江苏捷诚车载电子信息工程有限公司 | Heat dissipation and noise reduction device for square cabin of high-power generator set |
| WO2023077849A1 (en) * | 2021-11-05 | 2023-05-11 | 中车株洲电力机车有限公司 | Low-noise air-conditioning air duct for railway passanger car |
| WO2023077614A1 (en) * | 2021-11-05 | 2023-05-11 | 中车株洲电力机车有限公司 | Low-noise air conditioner ventilation system for railway passenger car |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117565910B (en) * | 2023-11-29 | 2024-06-18 | 河南中车重型装备有限公司 | Train wind channel damping noise reduction device and air conditioner ventilation system |
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| CN209191958U (en) * | 2018-10-23 | 2019-08-02 | 山东朗进科技股份有限公司 | A kind of railway vehicle air conditioner supply air system |
| CN113928358A (en) * | 2021-11-05 | 2022-01-14 | 中车株洲电力机车有限公司 | Low-noise air conditioner air duct of railway passenger car |
| CN113859287A (en) * | 2021-11-05 | 2021-12-31 | 中车株洲电力机车有限公司 | Low-noise air-conditioning ventilation system of railway passenger car |
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2021
- 2021-11-05 CN CN202111306128.7A patent/CN113928358A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023077849A1 (en) * | 2021-11-05 | 2023-05-11 | 中车株洲电力机车有限公司 | Low-noise air-conditioning air duct for railway passanger car |
| WO2023077614A1 (en) * | 2021-11-05 | 2023-05-11 | 中车株洲电力机车有限公司 | Low-noise air conditioner ventilation system for railway passenger car |
| CN114526157A (en) * | 2022-01-25 | 2022-05-24 | 江苏捷诚车载电子信息工程有限公司 | Heat dissipation and noise reduction device for square cabin of high-power generator set |
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| WO2023077849A1 (en) | 2023-05-11 |
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