Noise reduction and sound absorbing foam for charging piles

Abstract

The present application provides noise-reducing and sound-absorbing foam for charging piles. An adhesive layer is used to adhere the sound insulation layer and the charging pile box; the sound insulation layer includes two felt layers, and a reflective layer is connected between the two felt layers through a sound-absorbing material. The felt layer and the sound-absorbing material are used to absorb noise; the reflective layer is used to reflect part of the noise. The utility model sets a reflective layer and uses a first reflective plate and a second reflective plate to reflect part of the noise. Since the first reflective plate and the second reflective plate are wavy and perpendicular to each other, they can reflect noise from all directions and reflect the noise to all directions, thereby reducing noise and reducing the use of materials such as felt. By setting a sound-absorbing layer between the first reflective plate and the second reflective plate, the transmission of sound back and forth between the two reflective plates can be reduced. The foaming layer, foam glue and protective layer are used to protect the front and back sides of the felt layer, so as to prevent dust from entering the felt layer and at the same time prevent dust from flying inside the felt layer.

Description

Technical Field

[0001] The present application relates to the technical field of noise reduction and sound absorption, and in particular to noise reduction and sound absorption foam cotton for charging piles. Background Art

[0002] With the popularity of new energy vehicles, in order to solve the range anxiety of new energy vehicles, home or commercial charging piles are gradually entering the community. Charging piles are divided into DC charging piles and AC charging piles. DC charging piles charge faster than AC charging piles. However, DC charging piles will generate noise when working. This is because the charging module of the charging pile will generate a lot of heat during operation, and heat dissipation is needed to maintain the stable operation of the module. Most charging modules use forced air cooling for heat dissipation. The noise when the fan rotates, plus the electromagnetic noise, makes the charging pile produce more than 70 decibels of sound.

[0003] The existing solution is usually to install sound insulation cotton or sound insulation felt inside the charging pile shell. The sound insulation principle of traditional sound insulation cotton or sound insulation felt is to use the countless fibers inside to rebound the sound countless times, consume the energy of the sound, and convert it into heat energy, thereby reducing the volume of the sound and the transmission distance. However, sound insulation cotton and felt will absorb dust when used. When the internal space is occupied by dust, the sound insulation effect will be reduced. Utility Model Content

[0004] In order to solve the problem in the related art that the sound insulation effect of traditional sound insulation materials decreases with the increase of usage time, the present application provides noise-reducing and sound-absorbing foam for charging piles.

[0005] include:

[0006] An adhesive layer, which is used to adhere the sound insulation layer to the charging pile box;

[0007] The sound insulation layer comprises two felt layers, a reflective layer is connected between the two felt layers via a sound absorbing material, and the felt layer and the sound absorbing material are used to absorb noise;

[0008] The reflective layer includes a first reflective plate and a second reflective plate, and the first reflective plate and the second reflective plate are used to reflect part of the noise.

[0009] Furthermore, the adhesive layer includes foam glue, the foam glue main body is a foam material, and adhesive is applied on the front and back sides of the foam material.

[0010] Furthermore, the front side of the foam glue is bonded to the back side of one of the felt layers, and the back side of the foam glue is provided with isolation paper.

[0011] Furthermore, the isolation paper is made of release paper, and the oily surface of the release paper is bonded to the foam adhesive.

[0012] Furthermore, a protective layer is provided on the front side of the felt layer away from the adhesive layer.

[0013] Furthermore, the sound absorbing material comprises a foaming layer, one side of the foaming layer is connected to the felt layer, and the other side of the foaming layer is connected to the reflecting layer.

[0014] Furthermore, the sound absorbing material also includes a sound absorbing layer, and the sound absorbing layer is located between the first reflecting plate and the second reflecting plate, and is used for connecting the first reflecting plate and the second reflecting plate.

[0015] Furthermore, the first reflector is wavy in shape, and the distance between two adjacent wave peaks on the first reflector is 1.7 cm.

[0016] Furthermore, the second reflector is wavy in shape, and the distance between two adjacent wave peaks on the second reflector is 1.7 cm.

[0017] Furthermore, the corrugations on the first reflecting plate and the second reflecting plate are perpendicular to each other.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides a reflective layer, utilizes the first reflective plate and the second reflective plate to reflect part of the noise, thereby reducing the noise and reducing the use of materials such as felt. By providing a sound-absorbing material between the first reflective plate and the second reflective plate, the back and forth transmission of sound between the two reflective plates can be reduced. The adhesive layer can be used to effectively fix the sound insulation layer on the charging pile box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure provided for an implementation method of the present application;

[0021] Figure 2 A schematic diagram of the adhesive layer structure provided in one embodiment of the present application;

[0022] Figure 3 Provided for one embodiment of the present application Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 4 An exploded schematic diagram of the overall structure provided in one embodiment of the present application.

[0024] Illustration Description:

[0025] 1. Adhesive layer; 11. Release paper; 12. Foam glue;

[0026] 2. Sound insulation layer; 21. Felt layer; 22. Foam layer; 23. Sound absorption layer; 24. Protective layer;

[0027] 3. Reflection layer; 31. First reflection plate; 32. Second reflection plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In this document, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0030] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0031] See also Figures 1 to 4 , one embodiment of the present application provides a noise reduction and sound absorption foam for a charging pile, comprising:

[0032] Adhesive layer 1, which is used to adhere the sound insulation layer 2 and the charging pile box. The adhesive layer 1 includes a foam glue 12, the main body of the foam glue 12 is a foam material, and adhesive is applied on the front and back sides of the foam material.

[0033] The foam adhesive 12 uses PE foam double-sided adhesive, the main body is PE foam, and the acrylic adhesive is applied on both sides of the PE foam substrate, which has good retention and water and temperature resistance. The porous structure of the PE foam itself has the ability to partially absorb sound.

[0034] The front side of the foam glue 12 is bonded to the back side of one of the felt layers 21 , and a release paper 11 is provided on the back side of the foam glue 12 .

[0035] The isolation paper 11 is a release paper, and its oily surface is pasted with the foam glue 12. The isolation paper 11 is used to keep the adhesive surface on the back of the foam glue 12 clean. It can be easily separated from the foam glue 12 when used.

[0036] The sound insulation layer 2 includes two felt layers 21, between which a reflective layer 3 is connected via a sound absorbing material, and the felt layer 21 and the sound absorbing material are used to absorb noise. A protective layer 24 is provided on the front side of the felt layer 21 away from the adhesive layer 1.

[0037] The protective layer 24 is made of PE foam material, and the protective layer 24 and the felt layer 21 are adhered by adhesive, so as to protect the front side of the felt layer 21 away from the adhesive layer 1 .

[0038] The sound absorbing material comprises a foam layer 22 , one side of the foam layer 22 is connected to the felt layer 21 , and the other side of the foam layer 22 is connected to the reflective layer 3 .

[0039] The foaming layer 22 is made of polyurethane foam, which can fill the gap between the reflective layer 3 and the felt layer 21 and bond the felt layer 21 to the reflective layer 3. At the same time, the porous structure can play a role in sound absorption.

[0040] The cooperation of the protection layer 24, the foaming layer 22 and the foam glue 12 can protect the felt layer 21 and prevent the felt layer 21 from losing its effect due to dust.

[0041] The sound absorbing material further includes a sound absorbing layer 23 . The sound absorbing layer 23 is located between the first reflecting plate 31 and the second reflecting plate 32 and is used for connecting the first reflecting plate 31 and the second reflecting plate 32 .

[0042] The sound absorbing layer 23 is made of granular polyurethane foam, which is formed by hot pressing and then connected to the first reflecting plate 31 and the second reflecting plate 32 by adhesive, so as to absorb the sound between the first reflecting plate 31 and the second reflecting plate 32 .

[0043] The reflective layer 3 includes a first reflective plate 31 and a second reflective plate 32, and the first reflective plate 31 and the second reflective plate 32 are used to reflect part of the noise. The first reflective plate 31 is wavy, and the distance between two adjacent wave peaks on the first reflective plate 31 is 1.7 cm. The second reflective plate 32 is wavy, and the distance between two adjacent wave peaks on the second reflective plate 32 is 1.7 cm.

[0044] The first reflective plate 31 and the second reflective plate 32 are both made of flexible plastic material and are formed by a hot pressing process.

[0045] The first reflecting plate 31 and the second reflecting plate 32 can reflect sound. Due to the shapes of the first reflecting plate 31 and the second reflecting plate 32, the angle of sound reflection is different from the incident angle, so the sound can be dispersed, thereby reducing the energy of the sound.

[0046] The corrugations on the first reflecting plate 31 and the second reflecting plate 32 are perpendicular to each other.

[0047] Since the first reflector 31 and the second reflector 32 are perpendicular to each other, they can reflect transverse waves and longitudinal waves respectively, thereby improving the noise interception effect. At the same time, the reflected noise changes in frequency and energy due to the presence of the felt layer 21 and the foam layer 22, and can partially offset the incident noise, thereby reducing the noise at the sound source.

[0048] This application has at least one of the following advantages:

[0049] (1) By providing the first reflecting plate 31 and the second reflecting plate 32, the wave shape is used to diffusely reflect the sound and disperse the noise, thereby achieving the effect of noise reduction;

[0050] (2) By making the first reflector 31 and the second reflector 32 perpendicular to each other, transverse waves and longitudinal waves can be reflected respectively, thereby improving the noise reduction effect.

[0051] (3) The amount of felt used is reduced, and the protective layer 24, the foaming layer 22 and the foaming glue 12 are used to protect the felt layer 21, thereby preventing the felt layer 21 from losing its effect due to dust.

[0052] The noise reduction and sound absorbing foam for charging piles provided by the implementation method of the present application is introduced in detail above, and the principle and implementation method of the present application are explained by using specific examples. The above description is only used to help understand the method and core mechanism of the present application; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. Noise reduction and sound absorption foam for charging piles, characterized in that: include: An adhesive layer (1), the adhesive layer (1) being used for bonding the sound insulation layer (2) and the charging pile box; The sound insulation layer (2) comprises two felt layers (21), a reflective layer (3) is connected between the two felt layers (21) via a sound absorbing material, and the felt layer (21) and the sound absorbing material are used to absorb noise; The reflective layer (3) comprises a first reflective plate (31) and a second reflective plate (32), wherein the first reflective plate (31) and the second reflective plate (32) are used to reflect part of the noise.

2. The noise reduction and sound absorption foam for charging pile according to claim 1, characterized in that: The adhesive layer (1) comprises a foam glue (12), the foam glue (12) mainly comprising a foam material, and adhesive is applied to the front and rear sides of the foam material.

3. The noise reduction and sound absorption foam for charging pile according to claim 2, characterized in that: The front side of the foam glue (12) is bonded to the back side of one of the felt layers (21), and a separation paper (11) is provided on the back side of the foam glue (12).

4. The noise reduction and sound absorption foam for charging pile according to claim 3, characterized in that: The isolation paper (11) is made of release paper, and its oily surface is bonded to the foam glue (12).

5. The noise reduction and sound absorption foam for charging pile according to claim 3, characterized in that: A protective layer (24) is provided on the front side of the felt layer (21) away from the adhesive layer (1).

6. The noise reduction and sound absorption foam for charging pile according to claim 5, characterized in that: The sound absorbing material comprises a foaming layer (22), one side of the foaming layer (22) being connected to the felt layer (21), and the other side of the foaming layer (22) being connected to the reflecting layer (3).

7. The noise reduction and sound absorption foam for charging pile according to claim 6, characterized in that: The sound absorbing material further comprises a sound absorbing layer (23), wherein the sound absorbing layer (23) is located between the first reflecting plate (31) and the second reflecting plate (32), and is used for connecting the first reflecting plate (31) and the second reflecting plate (32).

8. The noise reduction and sound absorption foam for charging pile according to claim 7, characterized in that: The first reflecting plate (31) is wavy in shape, and the distance between two adjacent wave peaks on the first reflecting plate (31) is 1.7 cm.

9. The noise reduction and sound absorption foam for charging pile according to claim 8, characterized in that: The second reflecting plate (32) is wavy in shape, and the distance between two adjacent wave peaks on the second reflecting plate (32) is 1.7 cm.

10. The noise reduction and sound absorption foam for charging pile according to claim 9, characterized in that: The corrugations on the first reflecting plate (31) and the second reflecting plate (32) are perpendicular to each other.

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