Heat dissipation and noise reduction window

Abstract

A heat dissipation and noise reduction window relates to the technical field of heat dissipation devices and comprises a window frame and a plurality of S-shaped noise reduction blades which are fixed in the window frame and distributed at intervals from top to bottom, each noise reduction blade is composed of a porous sound absorption plate, sound absorption cotton and a sound blocking plate, and the sound blocking plates and the porous sound absorption plates define an S-shaped cavity. A soundproof felt is attached to the lower plate surface of the soundproof plate; the middle part of the porous sound-absorbing plate is downwards inclined from right to left, the right part of the porous sound-absorbing plate is connected with the right end of the sound-blocking plate after being bent upwards, the middle part of the sound-blocking plate is downwards inclined from right to left, and the left part of the sound-blocking plate is connected with the left end of the porous sound-absorbing plate after being bent downwards; the sound absorption cotton is in an S shape, and an S-shaped cavity defined by the sound blocking plate and the porous sound absorption plate is filled with the sound absorption cotton. The heat dissipation and noise reduction window provided by the invention is particularly suitable for being mounted in a power chamber of an internal combustion locomotive.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation devices, and in particular to the technology of a heat dissipation and sound-absorbing window. Background Art

[0002] The noise source of diesel locomotives mainly comes from the diesel generator set and other power equipment in the power room. According to GB14097-1999 "Noise Limits for Small and Medium Power Diesel Engines", the maximum allowable diesel engine noise is 130 decibels, and the measured diesel engine noise is usually between 90-110 decibels. During the design and manufacturing process of diesel locomotives, sound insulation cotton is filled in the walls around the power room to reduce the outward radiation of noise. In addition, the body structure also has a certain blocking effect on noise, and ultimately the outward radiation noise of the diesel locomotive can be controlled within 95 decibels.

[0003] In order to meet the heat dissipation requirements, the existing diesel locomotive power room structure is designed with large-area heat dissipation shutters on both sides of the power room. The heat dissipation shutters are mainly composed of a window frame and multiple shutters fixed in the window frame. The existing heat dissipation shutters all use flat shutters, whose main function is to dissipate heat. The noise passes through the shutters with little obstruction, and the sound insulation effect is poor. In addition, the width of the flat shutters is large, which leads to a relatively large overall thickness of the heat dissipation shutters, and the required installation space is also relatively large. Summary of the invention

[0004] In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a heat dissipation and sound-absorbing window with a small window thickness and good sound insulation effect.

[0005] In order to solve the above technical problems, the present invention provides a heat dissipation and sound-absorbing window, comprising a window frame, and a plurality of sound-absorbing blades fixed in the window frame, wherein the sound-absorbing blades are arranged at intervals from top to bottom in the window frame, and the characteristics are:

[0006] The muffler blade is S-shaped and consists of a porous sound-absorbing board, sound-absorbing cotton, and a sound baffle. The sound baffle is located above the porous sound-absorbing board. The sound baffle and the porous sound-absorbing board enclose an S-shaped cavity. The lower surface of the sound baffle is attached with sound insulation felt.

[0007] The middle part of the porous sound absorbing board is tilted downward from right to left, the right part of the porous sound absorbing board is bent upward and then joined to the right end of the sound baffle, and the left part of the porous sound absorbing board is bent downward and then bent to the lower left;

[0008] The middle part of the sound baffle is inclined downward from right to left, the right part of the sound baffle is bent upward and then bent to the upper right, and the left part of the sound baffle is bent downward and connected to the left end of the porous sound absorbing board;

[0009] The sound-absorbing cotton is S-shaped and is filled in the S-shaped cavity enclosed by the sound baffle and the porous sound-absorbing board. The middle part of the sound-absorbing cotton tilts downward from right to left, the right part of the sound-absorbing cotton is bent upward, and the left part of the sound-absorbing cotton is bent downward.

[0010] Furthermore, the right portion of the porous sound-absorbing board is bent vertically upward, the left portion of the sound-absorbing board is bent vertically downward, the right portion of the sound-absorbing cotton is bent vertically upward, and the left portion of the sound-absorbing cotton is bent vertically downward.

[0011] Furthermore, the angles between the middle of the porous sound-absorbing panel, the middle of the sound-absorbing panel, and the middle of the sound-absorbing cotton and the vertical axis are 57-67°.

[0012] Furthermore, the angles between the middle of the porous sound-absorbing panel, the middle of the sound-absorbing panel, the middle of the sound-absorbing cotton and the vertical axis are 62°.

[0013] Furthermore, the spacing between adjacent silencer blades is 15 to 22 mm.

[0014] Furthermore, the spacing between adjacent silencer blades is 17.6 mm.

[0015] Furthermore, the thickness of the sound-absorbing cotton is greater than or equal to 30 mm.

[0016] Furthermore, the bending length of the upwardly bent portion on the right side of the porous sound absorbing plate is greater than the arrangement spacing of adjacent sound-absorbing blades.

[0017] Furthermore, the bending length of the downwardly bent portion on the left side of the sound baffle is greater than the arrangement spacing of adjacent silencer blades.

[0018] The heat dissipation and sound-absorbing window provided by the present invention can greatly reduce the overall thickness of the window body under the condition of the same blade area due to the adoption of S-shaped sound-absorbing blades, and the installation space required is smaller than that of the existing heat dissipation shutters. Moreover, since the sound-absorbing blades are designed to be S-shaped, a large number of sound waves can directly enter the sound-absorbing blades through the upward bending portion on the right side of the porous sound-absorbing plate, and the sound waves entering the gaps between the blades are greatly reduced without reducing the heat dissipation flow area, thereby reducing the sound wave energy radiated outward through the gaps between the blades. Moreover, since the left part of the sound baffle is bent downward, a large number of sound waves can be reflected into the room, and the sound wave energy radiated outward is greatly reduced. Moreover, the sound-absorbing blades are composed of a porous sound-absorbing plate, sound-absorbing cotton, sound-insulating felt, and a sound baffle. When the sound waves pass through the sound-absorbing blades, they will be silenced multiple times in sequence by the porous sound-absorbing plate, sound-absorbing cotton, sound-insulating felt, and sound baffle, and the sound insulation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view cutaway diagram of a heat dissipation and sound absorbing window according to an embodiment of the present invention;

[0020] Figure 2is a front view cutaway diagram of a silencer blade in a heat dissipation silencer window according to an embodiment of the present invention;

[0021] Figure 3 It is a front exploded view of the silencer blades in the heat dissipation and silencer window according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following is a further detailed description of an embodiment of the present invention in conjunction with the accompanying drawings, but this embodiment is not intended to limit the present invention. All similar structures and similar variations of the present invention should be included in the protection scope of the present invention. The commas in the present invention all represent the relationship of and.

[0023] like Figure 1 As shown, a heat dissipation and sound-absorbing window provided in an embodiment of the present invention comprises a window frame 1, and a plurality of sound-absorbing blades 2 fixed in the window frame 1, wherein the sound-absorbing blades 2 are arranged at intervals from top to bottom in the window frame 1;

[0024] like Figure 2-Figure 3 As shown, the muffler blade 2 is S-shaped, and is composed of a porous sound-absorbing board 3, a sound-absorbing cotton 4, and a sound baffle 6. The sound baffle 6 is located above the porous sound-absorbing board 3. The sound baffle 6 and the porous sound-absorbing board 3 enclose an S-shaped cavity, and a sound insulation felt 5 is attached to the lower surface of the sound baffle 6.

[0025] The middle portion 31 of the porous sound absorbing plate is inclined downward from right to left, the right portion 32 of the porous sound absorbing plate is bent upward and then joined to the right end of the sound baffle 6, and the left portion 33 of the porous sound absorbing plate is bent downward and then bent to the lower left;

[0026] The middle portion 61 of the sound baffle is tilted downward from right to left, the right portion 62 of the sound baffle is bent upward and then bent to the upper right, and the left portion 63 of the sound baffle is bent downward and joined to the left end of the porous sound absorbing board 3;

[0027] The sound-absorbing cotton 4 is S-shaped and is filled in the S-shaped cavity enclosed by the sound baffle 6 and the porous sound-absorbing board 3. The middle part 41 of the sound-absorbing cotton is inclined downward from right to left, the right part 42 of the sound-absorbing cotton is bent upward, and the left part 43 of the sound-absorbing cotton is bent downward.

[0028] In the embodiment of the present invention, the right portion 32 of the porous sound absorbing board is bent vertically upward, the left portion 63 of the sound baffle is bent vertically downward, the right portion 42 of the sound absorbing cotton is bent vertically upward, and the left portion 43 of the sound absorbing cotton is bent vertically downward.

[0029] When designing the shape of the silencer blade, both silencer and smooth airflow must be considered. In order to achieve a better sound absorption effect, a larger vertical surface area should be reserved as much as possible. In order to ensure ventilation and heat dissipation effects and to meet the above requirements, a three-dimensional software simulation adjustment test is used. According to the test results, the angle A between the middle part 31 of the porous sound-absorbing panel, the middle part 61 of the sound-absorbing panel, and the middle part 41 of the sound-absorbing cotton and the vertical axis is 57-67°, and the layout spacing of adjacent silencer blades 2 is 15-22mm, which can achieve better heat dissipation and silencer effects. When the angle A is 62° and the layout spacing of adjacent silencer blades is 17.6mm, the heat dissipation and silencer effects are best.

[0030] In the embodiment of the present invention, the bending length of the upward bending portion on the right side of the porous sound absorbing plate (the bending length refers to the spacing between the upper and lower edges of the bending portion) is greater than the spacing between adjacent sound-absorbing blades, so that the sound waves entering the sound-absorbing blades through the upward bending portion on the right side of the porous sound absorbing plate are greater than the sound waves entering the gaps between the sound-absorbing blades; the bending length of the downward bending portion on the left side of the sound baffle is greater than the spacing between adjacent sound-absorbing blades, so that the sound waves reflected into the room by the downward bending portion on the left side of the sound baffle are greater than the sound waves radiated outward through the gaps between the sound-absorbing blades.

[0031] In the embodiment of the present invention, the thickness of the sound-absorbing cotton 4 is 30 mm, the thickness of the porous sound-absorbing board 3 is 1.5 mm, the thickness of the sound baffle 6 is 1.5 mm, and the thickness of the sound insulation felt 5 is 2 mm. In other embodiments, the thickness of the sound-absorbing cotton, the porous sound-absorbing board, the sound baffle, and the sound insulation felt may also be other values. To ensure the sound absorption effect, the thickness of the sound-absorbing cotton should be greater than or equal to 30 mm.

[0032] The embodiment of the present invention is particularly suitable for installation in the power room of a diesel locomotive, and its working principle is as follows:

[0033] When the noise source in the power room of a diesel locomotive radiates outward from right to left through the heat dissipation and silencer shutters, the sound waves are divided into two paths. The first path of sound waves directly enters the gap between the silencer blades, and the second path of sound waves passes through the upward bending portion on the right side of the porous sound-absorbing board and enters the inside of the silencer blade. After energy reduction by the sound-absorbing cotton, sound-insulating felt, and sound-absorbing board, most of the sound waves are reflected by the sound-absorbing board and then pass through the sound-insulating felt, sound-absorbing cotton, and porous sound-absorbing board in sequence to enter the gap between the blades on the lower side of the silencer blade or return to the room.

[0034] In the gap between the blades, the upward sound waves enter the upper silencer blade through the porous sound-absorbing board, and most of the downward sound waves are reflected by the sound baffle of the lower silencer blade and enter the upper silencer blade through the porous sound-absorbing board. After energy reduction by the sound-absorbing cotton, the sound insulation felt, and the sound baffle, most of the sound waves are reflected by the sound baffle and then pass through the sound insulation felt, the sound absorbing cotton, and the porous sound-absorbing board in sequence to enter the gap between the blades on the lower side of the silencer blade, and then are reflected by the sound baffle of the lower silencer blade again to enter the upper silencer blade. The sound waves repeatedly enter and exit the silencer blade many times, thereby being greatly reduced in energy, and then a part of the reduced-energy sound waves radiate outward from the left outlet of the gap between the blades, and the other reduced-energy sound waves are reflected back into the room under the obstruction of the downward bent portion on the left side of the sound baffle, thereby greatly reducing the energy of the sound waves radiated outward.

[0035] The second sound wave enters the silencer blade through the upward bending part on the right side of the porous sound-absorbing panel. The reflection angle of this sound wave is small, so part of it will be reflected back into the room. The other sound waves reflected into the gap between the blades will have a small reflection angle when they enter the upper silencer blade again. Therefore, after being reflected, they will repeatedly enter and exit the silencer blade more times, and the energy reduced will also be relatively large.

[0036] The first sound wave that directly enters the gap between the silencer blades has a relatively large reflection angle after entering the silencer blades. After being reflected, it repeatedly enters and exits the silencer blades less times than the second sound wave, and the energy attenuated is also less than the second sound wave. However, since the first sound wave also repeatedly enters and exits the silencer blades many times, a lot of energy can still be attenuated.

Claims

1. A heat dissipation and sound-absorbing window, comprising a window frame, and a plurality of sound-absorbing blades fixed in the window frame, wherein the sound-absorbing blades are arranged at intervals from top to bottom in the window frame, and characterized in that: The muffler blade is S-shaped and consists of a porous sound-absorbing board, sound-absorbing cotton, and a sound baffle. The sound baffle is located above the porous sound-absorbing board. The sound baffle and the porous sound-absorbing board enclose an S-shaped cavity. The lower surface of the sound baffle is attached with sound insulation felt. The middle part of the porous sound absorbing board is inclined downward from right to left, the right part of the porous sound absorbing board is bent upward and then joined with the right end of the sound baffle, and the left part of the porous sound absorbing board is bent downward and then bent to the lower left; The middle part of the sound baffle is inclined downward from right to left, the right part of the sound baffle is bent upward and then bent to the upper right, and the left part of the sound baffle is bent downward and connected to the left end of the porous sound absorbing board; The sound-absorbing cotton is S-shaped and is filled in the S-shaped cavity enclosed by the sound baffle and the porous sound-absorbing board. The middle part of the sound-absorbing cotton tilts downward from right to left, the right part of the sound-absorbing cotton is bent upward, and the left part of the sound-absorbing cotton is bent downward.

2. The heat dissipation and sound-absorbing window according to claim 1, characterized in that: The right part of the porous sound-absorbing board is bent vertically upward, the left part of the sound-absorbing board is bent vertically downward, the right part of the sound-absorbing cotton is bent vertically upward, and the left part of the sound-absorbing cotton is bent vertically downward.

3. The heat dissipation and sound-absorbing window according to claim 1, characterized in that: The included angles between the middle part of the porous sound absorbing board, the middle part of the sound baffle, the middle part of the sound absorbing cotton and the vertical axis are 57-67 degrees.

4. The heat dissipation and sound-absorbing window according to claim 3, characterized in that: The angle between the middle part of the porous sound absorbing board, the middle part of the sound baffle, the middle part of the sound absorbing cotton and the vertical axis is 62°.

5. The heat dissipation and sound absorbing window according to claim 1, characterized in that: The layout spacing between adjacent silencer blades is 15 to 22 mm.

6. The heat dissipation and sound absorbing window according to claim 5, characterized in that: The layout spacing between adjacent silencer blades is 17.6mm.

7. The heat dissipation and sound absorbing window according to claim 1, characterized in that: The thickness of the sound-absorbing cotton is greater than or equal to 30 mm.

8. The heat dissipation and sound absorbing window according to claim 1, characterized in that: The bending length of the upward bending portion on the right side of the porous sound absorbing plate is greater than the arrangement spacing of adjacent sound-absorbing blades.

9. The heat dissipation and sound absorbing window according to claim 1, characterized in that: The bending length of the downwardly bent portion on the left side of the sound baffle is greater than the arrangement spacing of adjacent silencer blades.

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