CN111361582A - Low-noise air conditioner air duct for railway vehicle - Google Patents
Low-noise air conditioner air duct for railway vehicle Download PDFInfo
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- CN111361582A CN111361582A CN202010272138.2A CN202010272138A CN111361582A CN 111361582 A CN111361582 A CN 111361582A CN 202010272138 A CN202010272138 A CN 202010272138A CN 111361582 A CN111361582 A CN 111361582A
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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
- B61D27/0009—Means for controlling or equalizing air pressure shocks in trains, e.g. when passing or crossing in tunnels
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Abstract
The invention discloses a low-noise air-conditioning air duct for a railway vehicle, which comprises an air duct main body (1), wherein the inner cavity of the air duct main body is divided into a dynamic pressure cavity (7) with an air supply outlet (2) and a static pressure cavity (8) with air supply holes (801) uniformly distributed at the bottom by a partition plate (9) arranged along the longitudinal direction of the air duct main body, a row of air passing holes (901) are longitudinally arranged on the partition plate, the static pressure cavity is communicated with the dynamic pressure cavity through the air passing holes (901), the air passing holes are arranged at a distance from the air supply outlet, and the caliber of the air passing hole close to the air supply outlet is larger than that of the air passing hole far away from the air supply outlet. The invention not only improves the uniformity of the airflow organization of the passenger room, but also reduces the noise in the passenger room, and integrally improves the riding comfort of passengers in the 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 for a railway vehicle.
Background
The air-conditioning duct is used as a main part of a passenger room of the railway vehicle, and influences the riding comfort of passengers in the whole passenger room, so that higher requirements on the air supply uniformity and the noise of the air-conditioning duct of the railway vehicle are provided.
The distance between an air conditioning duct and an air outlet top plate of a passenger room is very short due to the limited internal space of the current railway vehicle in use, and the noise in the passenger room is relatively large; in addition, the problems of uneven air flow organization in the passenger room, large temperature difference of different areas in the passenger room and the like exist. Aiming at the problem of high noise transmitted into a passenger room by an air-conditioning air duct, the commonly adopted mode is to stick sound-absorbing cotton in the air duct, however, the thickness of the sound-absorbing cotton is generally more than 10mm, the air supply section is reduced to a certain extent, and the flow velocity is increased to cause small increase of noise; in addition, the sound-absorbing cotton has a good effect of absorbing high-frequency noise, but has a poor effect of absorbing low-frequency noise emitted from the air conditioning unit.
Chinese patent CN203888808U discloses a static pressure type air duct for urban rail vehicles, but it directly supplies air to the passenger compartment through the main air duct connected with the air supply outlet, and can not isolate the noise generated by the dynamic pressure of the air flow, and the noise is reduced by using sound-absorbing cotton inside, so the above mentioned problem of poor sound-absorbing effect can occur.
Chinese patent CN207631255 discloses an air-conditioning air supply passage for rail transit vehicles, in which the air-conditioning air flows into a static pressure chamber through a dynamic pressure chamber and then flows into a passenger compartment through an air supply hole formed in the static pressure chamber, but the dynamic pressure chamber and the static pressure chamber are arranged up and down, and the static pressure chamber crosses over the roof, so that the air flow near the air supply hole is large, the air flow far away from the air supply hole is small, and the riding comfort of passengers is not good.
Disclosure of Invention
The invention aims to solve the technical problems that the air supply of the air-conditioning duct of the existing railway vehicle is uneven and the noise is high, and provides the low-noise air-conditioning duct for the railway vehicle, which can increase the air supply uniformity of a passenger room, reduce the noise and greatly improve the riding comfort of passengers in the passenger room.
In order to solve the technical problem, the low-noise air-conditioning air duct for the railway vehicle comprises an air duct main body, wherein an inner cavity of the air duct main body is divided into a dynamic pressure cavity with an air supply outlet and a static pressure cavity with air supply holes uniformly distributed at the bottom by a partition plate longitudinally arranged along the air duct main body, a row of air passing holes are longitudinally arranged on the partition plate, the static pressure cavity is communicated with the dynamic pressure cavity through the air passing holes, the air passing holes and the air supply outlet are arranged at a certain distance, and the caliber of the air passing hole close to the air supply outlet is larger than that of the air passing hole far away from the air supply outlet.
In addition, the applicant of the invention discovers that the caliber of the air passing hole close to the air supply outlet of the air conditioner is larger than that of the air passing hole far away from the air supply outlet of the air conditioner because the air flows forwards at high speed under the action of dynamic pressure to cause that the air flowing out of the air inlet from the air passing hole to the static pressure cavity is smaller, so that a part of air flow enters the static pressure cavity through the larger air passing hole while the air supply of the air conditioner flows to the far end rapidly through the dynamic pressure cavity, and the lower part of the installation position of the air conditioner can supply air, therefore, the air supply uniformity of the passenger room is improved, meanwhile, the way of transmitting the noise of the air conditioning unit into the passenger room is prolonged, the noise of the passenger room is reduced, and the riding comfort of passengers in the passenger room is greatly improved.
In order to ensure that the air supply of the passenger room is uniform and the riding comfort of passengers is improved, the dynamic pressure cavity is arranged in the middle of the air duct main body, and the static pressure cavity is symmetrically arranged on two sides of the dynamic pressure cavity, so that air conditioner air is sent into the passenger riding area on two sides of the passenger room.
In order to enable airflow organization of the passenger room to be smoother and reduce generation of vortex noise, a guide plate for guiding flow in the horizontal direction is arranged in the dynamic pressure cavity towards the air supply outlet, and pressure expansion plates are arranged on two sides of the guide plate to enable the inner cavity of the dynamic pressure cavity to extend in a streamline manner.
In order to ensure the air supply requirement of the installation position of the air conditioner and prevent the gas near the air supply outlet from being difficult to flow into the static pressure cavity due to high speed, a first spoiler capable of promoting the gas near the air supply outlet to enter the static pressure cavity is arranged in the dynamic pressure cavity.
Similarly, the top of the air supply outlet is provided with an air conditioner, and the static pressure cavity is internally provided with a second spoiler which can promote airflow to flow into the passenger room from an air supply hole at the bottom of the air conditioner.
In order to enable the air channel to absorb high-frequency noise generated by airflow vortex and low-frequency noise generated by the air conditioning unit, microperforated plates are attached to windward surfaces of the dynamic pressure cavity and the static pressure cavity, and an air gap exists between the windward surface and the microperforated plates.
In order to facilitate air return and improve the capacity of absorbing low-frequency noise of the air return, air return cavities are arranged on two sides of the air channel main body, micro-perforated plates are attached to the windward surfaces of the air return cavities, and air gaps exist between the windward surfaces of the air return cavities and the micro-perforated plates.
Preferably, the dynamic pressure cavity, the static pressure cavity and the return air cavity are arranged in parallel at the same horizontal height, so that the air duct structure can be simplified, and the air duct is convenient to manufacture and install; on the other hand, compared with the air channels arranged on the upper layer and the lower layer of the dynamic pressure cavity and the static pressure cavity, the air channels arranged in parallel at the same horizontal height are beneficial to saving the air channel installation space, and sufficient air supply space is reserved between the air channel top plate and the air channel air outlet hole plate, so that the wind noise at the position is reduced.
Preferably, the outside of the air return cavity is also connected with an air return branch pipe so as to prolong the paths of air supply and air return in the passenger compartment and greatly prevent the occurrence of short circuit of air flow in the passenger compartment.
In order to block the air flow heat exchange between the static pressure cavity and the air return cavity and prevent energy loss, heat insulation cotton is attached to a partition plate between the static pressure cavity and the air return cavity.
Preferably, the guide plate is a herringbone guide plate, the upper part of the guide plate is connected with the air supply outlet, and the lower part of the guide plate is connected with the bottom plate of the dynamic pressure cavity.
Preferably, the air passing hole is a waist-shaped hole, and the pressure expansion plate is an arc-shaped pressure expansion plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has the advantages that the herringbone guide plate and the arc diffusion plate are arranged below the air supply outlet, so that the airflow organization in the dynamic pressure cavity is more smooth, and the generation of vortex noise is reduced.
2. The distribution structure of the air passing holes on the partition plate between the dynamic pressure cavity and the static pressure cavity is optimized (gradually reduced and is away from the air supply outlet by a certain distance), so that the air duct has better air supply uniformity, and meanwhile, the way of transmitting the noise of the air conditioning unit into a passenger room is also prolonged.
3. The micro-perforated plates are used for absorbing noise on each windward side in the dynamic and static pressure cavities and the air return cavity, sound-absorbing cotton with the thickness of more than 10mm and a good high-frequency noise absorption effect is not used, the area of the air supply section of the air channel is increased to a certain extent, the gas flow velocity in the air channel is reduced, and meanwhile, the air channel can absorb high-frequency noise and can well absorb low-frequency noise.
In a word, the air conditioning duct 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, and improves the riding comfort of passengers in the passenger room as a whole.
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 view of a low noise air conditioning duct for a railway vehicle according to the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural diagram of a partition plate of the dynamic and static pressure chambers of the present invention.
In the figure: 1-air flue main body, 2-air supply outlet, 3-air return inlet, 4-waste discharge outlet, 5-air return branch pipe, 6-air return cavity, 7-dynamic pressure cavity, 701-guide plate, 702-pressure expansion plate, 703-first spoiler, 8-static pressure cavity, 801-air supply hole, 802-second spoiler, 9-partition plate, 901-air passing hole, 10-micro perforated plate and 11-vertical 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. 1-3, an embodiment of the low noise air conditioning duct for a railway vehicle of the present invention includes a duct body 1, a duct body 2, a supply port 2, a return port 3, a waste discharge port 4, a return branch duct 5, a return chamber 6, a dynamic pressure chamber 7, a deflector 701, a diffuser 702, a first spoiler 703, a static pressure chamber 8, a supply port 801, a second spoiler 802, a partition 9, a ventilation port 901, a microperforated panel 10, and a riser 11.
The inner cavity of the air duct main body 1 is divided into a dynamic pressure cavity 7 with an air supply outlet 2, a static pressure cavity 8 with air supply holes 801 uniformly distributed at the bottom and an air return cavity 6 with an air return inlet 3 and a waste discharge outlet 4 by a partition plate 9 and a vertical plate 11 which are longitudinally arranged along the air duct main body, the dynamic pressure cavity 7 is arranged in the middle of the air duct main body 1, and the static pressure cavity 8 and the air return cavity 6 are sequentially arranged on two sides of the dynamic pressure cavity 7 from inside to outside.
The dynamic pressure cavity 7 comprises a herringbone guide plate 701, the upper part of the guide plate 701 is riveted with the air supply outlet 2, and the lower part of the guide plate 701 is riveted with the bottom plate of the dynamic pressure cavity 7. The two sides of the guide plate 701 are symmetrically provided with the pressure expansion plates 702, so that the inner cavity of the dynamic pressure cavity 7 extends in a streamline shape. The diffuser plate 702 is preferably a circular arc-shaped diffuser plate 702.
An air conditioning unit is arranged on the air supply outlet 2, the air return inlet 3 and the waste discharge outlet 4 are all connected with the air conditioning unit, air conditioning airflow passes through the air supply outlet 2, is guided into gas flowing in the horizontal direction by the herringbone guide plate 701, and then enters the dynamic pressure cavity 7 after being diffused by the arc diffusion plate 702, so that the gas flows in a streamline form in the dynamic pressure cavity, and airflow vortex in the dynamic pressure cavity 7 is greatly reduced, thereby reducing noise generated by vortex.
The partition plate 9 is arranged between the dynamic pressure cavity 7 and the static pressure cavity 8, the static pressure cavity 8 is communicated with the dynamic pressure cavity 7 through a series of air passing holes 901 formed in the partition plate 9, the air passing holes 901 are not formed near the air supply opening 2, the air passing holes with large calibers are formed at a position which is a certain distance away from the air supply opening 2, and then the sizes of the air passing holes are gradually reduced. In addition, the middle parts of the two ends of the dynamic pressure cavity 7 are provided with first spoilers 703 to prevent the gas near the air supply outlet 2 from being difficult to flow into the static pressure cavity 8 due to high speed, and the second spoilers 802 are added into the static pressure cavity 8 to promote a part of the air flow to flow into the passenger compartment from the air supply hole 801 at the bottom of the air conditioning unit. Therefore, the air supply uniformity of the passenger room is ensured, the way of transmitting air conditioner noise into the passenger room is prolonged, and the noise of the passenger room is reduced to a great extent. The air passage holes 901 are preferably kidney-shaped holes.
The static pressure cavity 8 and the air return cavity 6 are separated by the vertical plate 11, and the side of the air return cavity of the vertical plate 11 is attached with heat insulation cotton so as to block the air flow heat exchange between the static pressure cavity and the air return cavity and prevent energy loss.
The microperforated plates 10 are respectively laid on the windward sides (including the windward sides of the guide plate 701, the pressure expanding plate 702, the first spoiler 703, the second spoiler 802, the partition plate 9, the vertical plate 11 and the like) in the dynamic pressure cavity 7, the static pressure cavity 8 and the return air cavity 6, and air gaps exist between each windward side and the corresponding microperforated plate 10, so that the air channel can absorb high-frequency noise generated by airflow vortex and can also absorb low-frequency noise generated by an air conditioning unit.
The dynamic pressure cavity 7, the static pressure cavity 8 and the return air cavity 6 are arranged in parallel at the same horizontal height.
The outside of the air return cavity 6 is also connected with an air return branch pipe 5 so as to prolong the paths of air supply and air return in the passenger room and greatly prevent the occurrence of short circuit of air flow in the passenger room.
When the low-noise air conditioning duct for the railway vehicle is used, air flow sent out by the air conditioning unit passes through the air supply outlet 2, is guided into horizontally flowing air through the herringbone guide plate 701, is diffused by the arc diffusion plate 702 and then enters the dynamic pressure cavity 7, then enters the static pressure cavity 8 through the air passing hole 901 in the partition plate 9, and is sent into a passenger room through the air supply hole 801 arranged at the bottom of the static pressure cavity 8. The return air is sent into the air conditioning unit through the return air branch pipe 5 and the return air cavity 6.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (10)
1. The low-noise air-conditioning air duct for the railway vehicle comprises an air duct main body (1) and is characterized in that an inner cavity of the air duct main body is divided into a dynamic pressure cavity (7) with an air supply opening (2) and a static pressure cavity (8) with air supply holes (801) uniformly distributed at the bottom by a partition plate (9) which is longitudinally arranged along the air duct main body, a row of air passing holes (901) are longitudinally arranged on the partition plate, the static pressure cavity is communicated with the dynamic pressure cavity through the air passing holes (901), the air passing holes and the air supply opening are arranged at a certain distance, and the caliber of the air passing hole close to the air supply opening is larger than that of the air passing hole far away from the air supply opening.
2. The low-noise air conditioning duct for the railway vehicle as claimed in claim 1, wherein the dynamic pressure cavity is disposed in the middle of the duct body, and the static pressure cavities are symmetrically disposed on two sides of the dynamic pressure cavity.
3. The low-noise air conditioning duct for the railway vehicle as claimed in claim 1, wherein a guide plate (701) for guiding the flow in the horizontal direction is disposed in the dynamic pressure chamber towards the air supply outlet, and pressure expansion plates (702) are disposed on two sides of the guide plate to make the inner cavity of the dynamic pressure chamber extend in a streamline shape.
4. The low noise air conditioning duct for railway vehicle as claimed in claim 1, wherein a first spoiler (703) capable of promoting air near the supply port to enter the static pressure chamber is disposed in the dynamic pressure chamber.
5. A low noise air conditioning duct for railway vehicle according to claim 1, characterized in that an air conditioner is installed on the top of the air outlet, and a second spoiler (802) capable of promoting the air flow from the air outlet at the bottom of the air conditioner to the passenger compartment is provided in the static pressure chamber.
6. The low-noise air conditioning duct for the railway vehicle as claimed in claim 1, wherein microperforated panels (10) are attached to windward sides of the dynamic pressure chamber and the static pressure chamber, and an air gap exists between the windward sides and the microperforated panels.
7. The low-noise air conditioning duct for the railway vehicle as claimed in claim 1, wherein air return cavities (6) are arranged on two sides of the duct main body, a micro-perforated plate (10) is attached to the windward side of each air return cavity, and an air gap exists between the windward side and the micro-perforated plate.
8. The low noise air conditioning duct for railway vehicle as claimed in claim 7, wherein the dynamic pressure chamber, the static pressure chamber and the return air chamber are arranged in parallel at the same level.
9. A low noise air conditioning duct for railway vehicle according to claim 7, characterized in that the outside of the air return chamber is connected with a return air branch pipe (5).
10. The low-noise air conditioning duct for the railway vehicle as claimed in claim 1, wherein a partition board between the static pressure cavity and the return air cavity is adhered with heat insulation cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010272138.2A CN111361582B (en) | 2020-04-09 | 2020-04-09 | Low-noise air conditioner air duct for railway vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010272138.2A CN111361582B (en) | 2020-04-09 | 2020-04-09 | Low-noise air conditioner air duct for railway vehicle |
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| CN111361582A true CN111361582A (en) | 2020-07-03 |
| CN111361582B CN111361582B (en) | 2021-03-26 |
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| CN202010272138.2A Active CN111361582B (en) | 2020-04-09 | 2020-04-09 | Low-noise air conditioner air duct for railway vehicle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976766A (en) * | 2020-08-21 | 2020-11-24 | 中车株洲电力机车有限公司 | Air conditioner air duct for rail transit vehicle |
| CN112078615A (en) * | 2020-09-01 | 2020-12-15 | 中车唐山机车车辆有限公司 | A wind channel structure and rail vehicle for function integration of rail vehicle |
| CN113183997A (en) * | 2021-06-09 | 2021-07-30 | 中车株洲电力机车有限公司 | Railway vehicle roof structure |
| CN113548072A (en) * | 2021-07-27 | 2021-10-26 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle air supply duct structure and rail vehicle |
| 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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111976766A (en) * | 2020-08-21 | 2020-11-24 | 中车株洲电力机车有限公司 | Air conditioner air duct for rail transit vehicle |
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| CN113183997A (en) * | 2021-06-09 | 2021-07-30 | 中车株洲电力机车有限公司 | Railway vehicle roof structure |
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| CN113548072A (en) * | 2021-07-27 | 2021-10-26 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle air supply duct structure and rail vehicle |
| 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 |
| 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 |
| 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 |
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