CN215513671U - Return air grid, carriage and rail vehicle - Google Patents

Abstract

The utility model provides a return air grille, a carriage and a railway vehicle, wherein the return air grille comprises a shell and a core layer; the air conditioner air return inlet is embedded in the shell, a first air vent is formed in one end, facing the outside of the railway vehicle, of the shell, and a second air vent is formed in one end, facing the inside of the railway vehicle, of the shell; the core layer is arranged inside the shell, at least one layer of sound absorption cavity is stacked in the core layer, and the sound absorption cavity is respectively communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure. The air return grille provided by the utility model can absorb or block noise from entering the interior of a vehicle while ensuring smooth ventilation, thereby reducing the noise in the vehicle and improving the riding comfort. The return air grille is adopted by both the carriage and the rail vehicle provided by the utility model.

Description

Return air grid, carriage and rail vehicle

Technical Field

The utility model belongs to the technical field of railway vehicles, and particularly relates to an air return grille, a carriage and a railway vehicle.

Background

With the rapid development of railways in China towards high speed and high comfort, higher requirements are put forward for the noise problem inside the carriage when vehicles run. The noise sources in the carriage mainly include wheel-rail noise, pneumatic noise, noise of an air conditioning system and the like. Wherein, the air conditioner return air inlet is the structure that realizes the inside ventilation in carriage, installs the return air grid on the air conditioner return air inlet, and the return air grid structure commonly used at present is individual layer aluminium system shutter, utilizes its rectangular hole of equidistant distribution to ventilate, but when adopting this kind of return air grid structure, the wheel track noise and the air conditioning system noise that the vehicle travel in-process produced can directly transmit to the carriage through rectangular hole inside, lead to arousing the inside noise in carriage high, seriously influence the riding comfort of vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a return air grille, a carriage and a railway vehicle, and aims to solve the problem that the air conditioner return air inlet grille adopted by the railway vehicle in the prior art cannot block noise.

In order to achieve the purpose, the utility model adopts the technical scheme that: the return air grille comprises a shell and a core layer; the air conditioner air return inlet is embedded in the shell, a first air vent is formed in one end, facing the outside of the railway vehicle, of the shell, and a second air vent is formed in one end, facing the inside of the railway vehicle, of the shell; the core layer is arranged inside the shell, at least one layer of sound absorption cavity is stacked in the core layer, and the sound absorption cavity is respectively communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure.

As another embodiment of the application, the core layer is formed by stacking at least two sound-absorbing plates at intervals, a plurality of micro-perforated structures are distributed on the sound-absorbing plates in an array mode, and a sound-absorbing cavity is defined by the two adjacent sound-absorbing plates and the inner wall of the shell.

As another embodiment of the application, the sound-absorbing plates of adjacent layers are connected and supported through a plurality of ribs, and the sound-absorbing cavity is divided into a plurality of sound-absorbing flow channels which are arranged periodically by the plurality of ribs.

As another embodiment of the present application, the housing includes an outer frame, a bottom plate, and a panel; wherein, the outer frame is embedded on the air-conditioning return air inlet; the bottom plate is connected with one end of the outer frame facing the outside of the railway vehicle, and the first vent is arranged on the bottom plate; the panel is connected with one end of the outer frame facing the inside of the railway vehicle, and the second ventilation opening is formed in the panel.

As another embodiment of the present application, a plurality of first air holes are formed in the bottom plate, and the first air holes are arranged periodically, and form a first ventilation opening together; a plurality of second air holes which are arranged periodically are formed in the panel, and the second air holes jointly form a second ventilation opening.

As another embodiment of the present application, the bottom plate and the face plate are both spaced apart from the core layer.

As another embodiment of this application, the border of bottom plate is equipped with first L type hem, and the border of panel is equipped with second L type hem, and first L type hem and the relative laminating of second L type hem just connect in the lump on the frame.

As another embodiment of the present application, the outer frame includes a face ring and a pressing ring; the surface ring is sleeved on the periphery of the panel, the back surface of the surface ring is attached to the second L-shaped folded edge, and the surface ring is used for being attached and connected with the inner wall of the carriage on the periphery of the air conditioner air return inlet; the pressing ring is sleeved on the periphery of the bottom plate and is pressed on the first L-shaped folded edge.

The return air grille provided by the utility model has the beneficial effects that: compared with the prior art, the return air grille is embedded in the air conditioner return air inlet of the railway vehicle by utilizing the shell, the sound absorption cavity is communicated with the first vent and the second vent through the micro-perforated structure on the core layer, so that the air inside and outside the vehicle can be ensured to circulate, the air temperature inside the vehicle can be balanced, and meanwhile, the micro-perforated structure can absorb or block the noise of a specific frequency band, so that the noise outside the vehicle and the running noise of the air conditioner cannot pass through the sound absorption cavity to enter the vehicle, the noise inside the vehicle can be reduced, and the riding comfort level is improved.

The utility model also provides a carriage which comprises the return air grille and has the same beneficial effects as the return air grille, and the description is omitted.

The utility model also provides a railway vehicle which comprises the carriage and has the same beneficial effects as the carriage, and the description is omitted.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a return air grille according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic perspective view of a core layer used in an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a panel according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a base plate according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a car provided in the embodiment of the present invention.

In the figure: 1. a housing; 11. a panel; 110. a second air hole; 111. a second L-shaped folded edge; 112. a second seal plate; 12. a base plate; 120. a first air vent; 121. a first L-shaped folded edge; 122. a first seal plate; 13. an outer frame; 131. a face ring; 132. pressing a ring; 133. pressing and sewing the cotton pad; 2. a core layer; 20. a sound absorption cavity; 200. a sound absorption runner; 201. a micro-perforated structure; 21. a sound absorbing panel; 22. ribs; 3. an anti-falling suspension loop; 4. a carriage; 40. an air-conditioning return air inlet; 41. and an air return grille.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 3 and 6 together, the return air grille of the present invention will now be described. The return air grille comprises a shell 1 and a core layer 2; the air conditioner air return inlet is characterized in that the shell 1 is used for being embedded on an air conditioner air return inlet 40 of a railway vehicle, a first air vent is formed in one end, facing the outside of the railway vehicle, of the shell 1, and a second air vent is formed in one end, facing the inside of the railway vehicle, of the shell 1; inside casing 1 was located to sandwich layer 2, the sandwich layer 2 internal lamination was provided with at least one deck sound absorption cavity 20, and sound absorption cavity 20 communicates with first vent, second vent respectively through micro-perforated structure 201.

The micro-perforated plate can absorb or block noise in a specific frequency band, and the sound insulation frequency band and the sound insulation quantity corresponding to the micro-perforated plate can be correspondingly adjusted by adjusting the perforation rate, the aperture and the plate thickness of the micro-perforated plate; in addition, inside casing 1 was located to sandwich layer 2, specifically can be the periphery wall of sandwich layer 2 and casing 1's internal perisporium fixed connection, two lateral walls of sandwich layer 2 orientation first vent, second vent can be with the laminating of casing 1's both ends wall, also can set up with casing 1's both ends wall interval, only need guarantee that the air current can be through first vent, micro-perforated structure 201, second vent circulation between the vehicle is inside and outside can.

The working principle of the return air grille provided by the utility model is as follows: because the sound absorption cavity 20 is communicated with the first vent and the second vent through the micro-perforated structure 201, that is, the two side cavity walls of the sound absorption cavity 20 facing the first vent and the second vent are respectively provided with the micro-perforated structure 201, the two side cavity walls can be used as two layers of micro-perforated plates arranged at intervals for sound absorption and noise reduction, the thickness of the two side cavity walls of the sound absorption cavity 20 and the specific size of the micro-perforated structure 201 can be designed according to the main frequency band of noise generated in the running process of the vehicle by using the acoustic impedance calculation method of the micro-perforated plates in the prior art (the smaller the acoustic impedance is, the larger the acoustic impedance is), on the premise of ensuring that the ventilation quantity of the return air grid meets the requirement, the sound insulation quantity is improved, so that the external noise (such as wheel track noise during running of the vehicle, noise generated during running of an air conditioner and the like) can be blocked to the inside of the vehicle through the return air grid to the maximum extent, thereby reducing the noise inside the vehicle.

Compared with the prior art, the return air grille provided by the utility model has the advantages that the shell 1 is embedded on the air conditioner return air inlet 40 of a railway vehicle, the sound absorption cavity 20 of the return air grille is communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure 201 on the core layer 2, so that the air inside and outside the vehicle can be ensured to circulate, the air temperature inside the vehicle can be balanced, and meanwhile, the micro-perforated structure 201 can absorb or block the noise of a specific frequency band, so that the wheel track noise and the air conditioner running noise outside the vehicle cannot penetrate through the sound absorption cavity 20 to enter the vehicle, the noise inside the vehicle can be reduced, and the riding comfort level is improved.

As a specific embodiment of the return air grille provided by the present invention, please refer to fig. 3, the core layer 2 is formed by stacking at least two sound absorbing plates 21 at intervals, a plurality of micro-perforated structures 201 are distributed on the sound absorbing plates 21 in an array, and a sound absorbing cavity 20 is enclosed by two adjacent sound absorbing plates 21 and the inner wall of the housing 1. The micro-perforated plate structure 201 that distributes in array on the acoustic baffle 21, thereby form the microperforated panel, the range upon range of two-layer microperforated panel in interval can enclose into a sound absorption cavity 20 with casing 1 inner wall, the range upon range of three-layer microperforated panel in interval can enclose into upper and lower adjacent two-layer sound absorption cavity 20 with casing 1 inner wall, moreover, the steam generator is simple and compact in structure, can set up the sound absorption cavity 20 of the more number of piles in limited space, thereby can improve the frequency channel scope of the separation noise of 2 absorption of sandwich layer, thereby improve the noise reduction effect that gives sound insulation of 2 sandwich layers.

In this embodiment, referring to fig. 3, the sound absorbing panels 21 of adjacent layers are connected and supported by a plurality of ribs 22, and the plurality of ribs 22 divide the sound absorbing cavity 20 into a plurality of sound absorbing runners 200 arranged periodically. It should be noted that the periodic arrangement refers to a regular circular arrangement mode, specifically, in this embodiment, a plurality of sound absorption runners 200 may be arranged in a matrix, and each sound absorption runner 200 is provided with a micro-perforated structure 201 arranged in the same array mode; the ribs 22 are adopted to support the sound absorption plates 21 of adjacent layers, so that the structural stability of the core layer 2 can be improved; on the other hand can be cut apart into periodic arrangement's a plurality of sound absorption runner 200 with sound absorption cavity 20, when noise (sound wave) got into sound absorption cavity 20 inside, the sound wave took place reflection resonance in each sound absorption runner 200, combine the resonance between each layer sound absorption cavity 20 and the acoustic resistance dissipation characteristic of micro-perforated structure 201 simultaneously, under the condition that does not influence the circulation of air, can further improve the noise reduction effect that gives sound insulation, and simple structure, processing preparation is convenient.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 5, in which the housing 1 includes an outer frame 13, a bottom plate 12 and a panel 11; wherein, the outer frame 13 is embedded on the air-conditioning return air inlet 40; the bottom plate 12 is connected with one end of the outer frame 13 facing the outside of the railway vehicle, and the first ventilation opening is arranged on the bottom plate 12; the panel 11 is connected with one end of the outer frame 13 facing the inside of the rail vehicle, and the second ventilation opening is formed in the panel 11. The shell 1 is of a split structure, is convenient to assemble, simple in structure and convenient to process and manufacture.

In the present embodiment, referring to fig. 4 and fig. 5, a plurality of first air holes 120 are formed on the bottom plate 12, and the first air holes 120 form a first ventilation opening together; the panel 11 is provided with a plurality of second air holes 110 arranged periodically, and the plurality of second air holes 110 form a second ventilation opening together. High structural strength and beautiful appearance.

Specifically, referring to fig. 2, the bottom plate 12 and the face plate 11 are spaced apart from the core layer 2. The air is at the inside and outside circulation in-process of vehicle, can be between bottom plate 12 and sandwich layer 2 or the clearance space between panel 11 and sandwich layer 2 can be remixed after being cut apart by micro-perforated structure 201 during through sandwich layer 2, thereby discharge by first vent or second vent, can solve bottom plate 12, the hookup location between each first wind hole 120 when panel 11 and sandwich layer 2 laminating set up, hookup location between each second wind hole 110 blocks the problem that the air current circulates smoothly, thereby improve ventilation efficiency.

In addition, referring to fig. 1, at least one anti-falling hanging ring 3 is arranged on the back of the panel 11, and the anti-falling hanging ring 3 is connected with a hanging chain arranged on the inner wall of the carriage 4 of the railway vehicle. The phenomenon that the return air grille falls and damages a human body due to loose connection between the outer frame 13 and the air conditioner return air inlet 40 is avoided, and the safety is high; in addition, when the return air grille needs to be detached for air conditioner maintenance, the return air grille can be hung below the air conditioner return air inlet 40, so that the maintenance operation can be conveniently carried out by a single person.

Referring to fig. 1 to 5, as a specific implementation manner of the embodiment of the present invention, a first L-shaped folded edge 121 is disposed at an edge of the bottom plate 12, a second L-shaped folded edge 111 is disposed at an edge of the face plate 11, and the first L-shaped folded edge 121 and the second L-shaped folded edge 111 are attached to each other and are connected to the outer frame 13. It should be noted that the L-shaped folding edge may be formed as a closed ring structure around the edges of the panel 11 and the bottom plate 12, or may be formed on two opposite side edges of the panel 11 and the bottom plate 12, see fig. 4 and fig. 5, at this time, the second sealing plate 112 and the first sealing plate 122 are formed by bending on other side walls of the panel 11 and the bottom plate 12, so that the first L-shaped folding edge 121 and the second L-shaped folding edge 111 can be relatively attached to form a closed inner cavity of the housing 1, and then only the first L-shaped folding edge 121 and the second L-shaped folding edge 111 need to be fastened and connected with the outer frame 13 together.

In the present embodiment, referring to fig. 1 and fig. 2, the outer frame 13 includes a surface ring 131 and a pressing ring 132; the surface ring 131 is sleeved on the periphery of the panel 11, the back surface of the surface ring is attached to the second L-shaped folded edge 111, and the surface ring 131 is used for being attached to and connected with the inner wall of the carriage 4 on the periphery of the air conditioner air return opening 40; the pressing ring 132 is sleeved on the periphery of the bottom plate 12 and is press-fitted on the first L-shaped folded edge 121. During assembly, the core layer 2 is firstly assembled in the shell 1, specifically, the edge of the core layer 2 and the first L-shaped folding edge 121 and/or the second L-shaped folding edge 111 are fixedly connected in a welding or bonding or fastener connecting mode, then the panel 11 is embedded into an inner hole of the face ring 131, the second L-shaped folding edge 111 is lapped on the back face of the face ring 131, finally, the pressing ring 132 is sleeved on the periphery of the bottom plate 12 and is pressed on the first L-shaped folding edge 121, the fastening piece sequentially penetrates through the pressing ring 132, the first L-shaped folding edge 121 and the second L-shaped folding edge 111 and then is fastened with the face ring 131, the structure is simple and stable, and the disassembly and the assembly are convenient.

Further, referring to fig. 2, a seam pressing cotton pad 133 is disposed between the pressing ring 132 and the first L-shaped folded edge 121. Utilize the cushioning property of the cotton pad 133 of crack pressing, can reduce the vehicle operation in-process and lead to the phenomenon of connection structure collision noise production because of the vibration to reduce vehicle internal noise, can also improve clamping tightness and the stability of clamping ring 132 and face ring 131 back to first L type hem 121 and second L type hem 111, avoid the fastener to receive the pine of shaking or drop.

The utility model also provides a carriage. Referring to fig. 1 to 6, the compartment includes a compartment body having an air-conditioning return air inlet 40, and the return air grille 41 disposed on the air-conditioning return air inlet 40.

The carriage provided by the utility model adopts the return air grille 41, the return air grille 41 is embedded on the air conditioner return air inlet 40 of the railway vehicle by utilizing the shell 1, the sound absorption cavity 20 is communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure 201 on the core layer 2, so that the air inside and outside the vehicle can be ensured to circulate, the air temperature inside the vehicle can be balanced, and meanwhile, the micro-perforated structure 201 can absorb or block the noise of a specific frequency band, so that the wheel track noise outside the vehicle and the air conditioner running noise cannot pass through the sound absorption cavity 20 to enter the vehicle, the noise inside the vehicle can be reduced, and the riding comfort level is improved.

The utility model further provides the railway vehicle. Referring to fig. 1 to 6, the railway vehicle includes a plurality of the carriages 4 connected in sequence.

The rail vehicle provided by the utility model adopts the carriage 4, the return air grille 41 is embedded in the air conditioner return air inlet 40 of the carriage 4, the sound absorption cavity 20 of the return air grille 41 is communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure 201 on the core layer 2, so that the air inside and outside the vehicle can be ensured to circulate, the air temperature inside the vehicle can be balanced, and meanwhile, the micro-perforated structure 201 can absorb or block the noise of a specific frequency band, so that the wheel track noise outside the vehicle and the air conditioner running noise cannot pass through the sound absorption cavity 20 to enter the vehicle, the noise inside the vehicle can be reduced, and the riding comfort level is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Return air grid, its characterized in that includes:

the air conditioner air return inlet is embedded in an air conditioner air return inlet of a railway vehicle, a first air vent is formed in one end, facing the outside of the railway vehicle, of the shell, and a second air vent is formed in one end, facing the inside of the railway vehicle, of the shell;

the core layer is arranged inside the shell, at least one layer of sound absorption cavity is arranged in the core layer in a stacked mode, and the sound absorption cavity is communicated with the first ventilation opening and the second ventilation opening through the micro-perforated structure.

2. The return air grille of claim 1 wherein the core layer is formed by stacking at least two sound absorbing plates at intervals, a plurality of micro-perforated structures are distributed on the sound absorbing plates in an array manner, and the sound absorbing cavity is enclosed by two adjacent sound absorbing plates and the inner wall of the shell.

3. The return air grille of claim 2 wherein the sound absorbing panels of adjacent layers are connected and supported by a plurality of ribs, and the plurality of ribs divide the sound absorbing cavity into a plurality of sound absorbing flow passages which are arranged periodically.

4. A return air grill as set forth in any one of claims 1 to 3 wherein said housing includes:

the outer frame is embedded on the air-conditioning return air inlet;

the bottom plate is connected with one end, facing the outside of the railway vehicle, of the outer frame, and the first ventilation opening is formed in the bottom plate;

the panel is connected with one end, facing the inside of the railway vehicle, of the outer frame, and the second ventilation opening is formed in the panel.

5. The return air grille of claim 4 wherein the base plate is provided with a plurality of first air holes arranged in a periodic manner, and the first air holes are formed into the first ventilation opening; the panel is provided with a plurality of second air holes which are arranged periodically, and the second air holes jointly form the second ventilation opening.

6. The return air grill of claim 5 wherein said base and said face sheets are spaced from said core.

7. The return air grill as recited in claim 4 wherein the edge of said base panel is formed with a first L-shaped folded edge and the edge of said panel is formed with a second L-shaped folded edge, said first L-shaped folded edge and said second L-shaped folded edge being attached to each other and to said outer frame.

8. The return air grill of claim 7 wherein said outer frame includes:

the surface ring is sleeved on the periphery of the panel, the back surface of the surface ring is attached to the second L-shaped folded edge, and the surface ring is used for being attached to and connected with the inner wall of the carriage on the periphery of the air conditioner air return inlet;

and the pressing ring is sleeved on the periphery of the bottom plate and is pressed on the first L-shaped folded edge.

9. A vehicle cabin comprising a return air grille according to any one of claims 1 to 8.

10. Railway vehicle, characterized in that it comprises a carriage according to claim 9.

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