Noise reduction device for charging pile

Abstract

The utility model discloses a noise reduction device for a charging pile, and belongs to the technical field of noise reduction of charging piles. The noise reduction device comprises a noise reduction cavity, a sound insulation cavity groove and a noise reduction channel which are communicated are formed in the noise reduction cavity, the sound insulation cavity groove wraps a charging pile cooling fan during working, and an outlet of the noise reduction channel is formed in the wall face of the noise reduction cavity. Sound absorption cotton is arranged on the inner wall surface of the sound insulation cavity groove; and a silencing pipe is arranged on the inner wall surface of the silencing channel. The noise reduction cavity is internally provided with the sound insulation cavity groove and the noise reduction channel which communicate with each other, the sound absorption cotton is arranged on the inner wall face of the sound insulation cavity groove, and the noise reduction pipe is arranged on the inner wall face of the noise reduction channel. During working, the sound insulation cavity is wrapped outside the heat dissipation fan of the charging pile, the circumferential noise of the heat dissipation fan is preliminarily eliminated in the stage of the sound insulation cavity, the noise is further eliminated through the noise reduction channel, and the charging pile is obvious in noise reduction effect, economical and practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging pile noise reduction, and relates to a noise reduction device for a charging pile. Background Art

[0002] With the development of electric vehicles, the number of charging piles installed in residential communities has increased rapidly. The charging pile will generate noise during use, especially during the night rest time. The noise generated by the charging pile will affect the sleep quality of residents. Therefore, the charging pile noise is one of the common problems in the charging stations of residential communities. The charging pile noise mainly comes from the sound emitted by the fan during heat dissipation. Because the space of the charging pile is small, a large amount of heat will be generated when the car is charging, and a fan is needed for exhaust heat dissipation.

[0003] Although the existing charging piles usually use the laid damping plates and sound-absorbing cotton to complete the noise reduction operation, due to the need to meet the heat dissipation requirements of the cooling fan, the noise reduction efficiency brought by only using the damping plates and sound-absorbing cotton is low, and the problem of excessive charging pile noise still exists. Content of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem of low noise reduction efficiency of only using damping plates and sound-absorbing cotton for charging piles in the prior art, and provide a noise reduction device for charging piles.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a noise reduction device for a charging pile, which includes a noise reduction cavity. A communicated sound insulation cavity groove and a sound absorption channel are arranged in the noise reduction cavity. The sound insulation cavity groove wraps around the outside of the charging pile cooling fan during operation, and the outlet of the sound absorption channel is arranged on the wall surface of the noise reduction cavity; a sound-absorbing cotton is arranged on the inner wall surface of the sound insulation cavity groove; a sound absorption pipe is arranged on the inner wall surface of the sound absorption channel.

[0007] The further improvement of the utility model lies in:

[0008] The sound insulation cavity groove is arranged at the bottom of the noise reduction cavity, and the opening of the sound insulation cavity groove is arranged on the side wall surface of the noise reduction cavity; the outlet of the sound absorption channel is arranged at the upper part of the side wall surface where the opening of the sound insulation cavity groove is not arranged; the sound absorption channel is an S-shaped structure.

[0009] One side wall surface of the lower part of the sound absorption channel is arc-shaped; one side wall surface of the upper part of the sound absorption channel is arc-shaped.

[0010] The aperture in the middle of the sound insulation cavity groove is smaller than the apertures at both ends.

[0011] A noise reduction silencing cylinder is arranged in the middle of the sound absorption channel; the noise reduction silencing cylinder includes a square cylinder, a noise reduction pad is arranged in the square cylinder, a plurality of first sound absorption sheets are uniformly arranged at the lower end of the noise reduction pad in the square cylinder, and a plurality of second sound absorption sheets are uniformly arranged at the upper end of the noise reduction pad in the square cylinder.

[0012] The first sound absorption sheet and the second sound absorption sheet are spindle-shaped; the first sound absorption sheet and the second sound absorption sheet are vertically arranged in the square cylinder.

[0013] A plurality of heat dissipation fins are arranged on the outer wall surface of the middle part of the sound insulation cavity groove.

[0014] A filter plate is arranged at the outlet of the sound absorption channel, and a shutter is arranged outside the filter plate.

[0015] The sound absorption pipe is an isosceles trapezoidal pipe.

[0016] The sound insulation cavity groove and the sound absorption channel are connected through a connecting pipe.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses a noise reduction device for a charging pile. By arranging a communicated sound insulation cavity groove and a sound absorption channel in a noise reduction cavity body, a sound absorption cotton is arranged on the inner wall surface of the sound insulation cavity groove, and a sound absorption pipe is arranged on the inner wall surface of the sound absorption channel. During operation, the sound insulation cavity groove is wrapped outside the heat dissipation fan of the charging pile. At the sound insulation cavity groove stage, the noise around the heat dissipation fan is initially eliminated, and the sound absorption channel further completes the noise elimination. The noise reduction effect of the utility model is obvious, and it is economical and practical.

[0019] Furthermore, the sound absorption channel is of an S-shaped structure. One side wall surface of the lower part of the sound absorption channel is arc-shaped, a circular buffer cavity is formed at the lower end of the sound absorption channel, and one side wall surface of the upper part of the sound absorption channel is also arc-shaped, so that the sound absorption and noise reduction efficiency is higher.

[0020] Furthermore, the aperture of the middle part of the sound insulation cavity groove is smaller than that of both ends, and a plurality of heat dissipation fins are fixed on the outer side of the middle part of the sound absorption channel, improving the heat dissipation efficiency of the sound absorption channel.

[0021] Furthermore, a noise reduction silencing cylinder is arranged in the middle of the sound absorption channel. The noise reduction silencing cylinder includes a square cylinder, a noise reduction pad is arranged in the square cylinder, a plurality of first sound absorption sheets are uniformly arranged at the lower end of the noise reduction pad in the square cylinder, and a plurality of second sound absorption sheets are uniformly arranged at the upper end of the noise reduction pad in the square cylinder, improving the noise reduction performance of the sound absorption channel.

[0022] Furthermore, a filter plate is provided at the outlet of the sound absorption channel, and louvers are provided on the outer side of the filter plate. The filter plate prevents foreign impurities from entering the sound absorption channel, thereby improving the heat dissipation efficiency and prolonging the service life of the sound absorption channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of a noise reduction device for a charging pile in the present invention;

[0025] Figure 2 Stereogram of a noise reduction device for a charging pile in the present invention;

[0026] Figure 3 Structural schematic diagram of a sound absorption channel in a noise reduction device for a charging pile in the present invention;

[0027] Figure 4 Stereogram of a sound absorption channel in a noise reduction device for a charging pile in the present invention;

[0028] Figure 5 Structural schematic diagram of a noise reduction and sound absorption cylinder in a noise reduction device for a charging pile in the present invention;

[0029] Figure 6 Stereogram of a noise reduction and sound absorption cylinder in a noise reduction device for a charging pile in the present invention.

[0030] Wherein: 1 - noise reduction cavity; 2 - sound insulation cavity groove; 3 - connecting pipe; 4 - sound absorption channel; 5 - sound absorption pipe; 6 - noise reduction and sound absorption cylinder; 7 - heat dissipation fins; 8 - louvers; 9 - filter plate; 61 - square cylinder; 62 - first sound absorption sheet; 63 - second sound absorption sheet; 64 - noise reduction pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0036] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] The following further describes the present invention in detail with reference to the accompanying drawings:

[0038] See Figure 1 and Figure 2, the present utility model discloses a noise reduction device for a charging pile, which includes a noise reduction cavity 1. An interconnected sound insulation cavity groove 2 and a sound absorption channel 4 are arranged in the noise reduction cavity 1, and the sound insulation cavity groove 2 and the sound absorption channel 4 are connected by a connecting pipe 3. When the sound insulation cavity groove 2 works, it is wrapped outside the cooling fan of the charging pile, and is connected by soft connection or welding. Since the cooling fan vibrates during operation, soft connection is the best choice. The outlet of the sound absorption channel 4 is arranged on the wall surface of the noise reduction cavity 1. The inner cavity volume of the sound insulation cavity groove 2 is larger than the cooling fan inside the charging pile. Sound-absorbing cotton is arranged on the inner wall surface of the sound insulation cavity groove 2, so that the circumferential noise of the cooling fan can be eliminated through the sound insulation cavity groove 2. The sound insulation cavity groove 2 is arranged at the bottom of the noise reduction cavity 1, and the opening of the sound insulation cavity groove 2 is arranged on the side wall surface of the noise reduction cavity 1. The outlet of the sound absorption channel 4 is arranged at the upper part of the side wall surface where the opening of the sound insulation cavity groove 2 is not arranged. The sound absorption channel 4 is of an S-shaped structure. One side wall surface of the lower part of the sound absorption channel 4 is arc-shaped, and one side wall surface of the upper part of the sound absorption channel 4 is arc-shaped, so that a circular or arc-shaped channel is beneficial to achieve the purpose of noise reduction. The aperture in the middle of the sound insulation cavity groove 2 is smaller than the apertures at both ends. A plurality of heat dissipation fins 7 are arranged on the outer wall surface in the middle of the sound insulation cavity groove 2, and the heat dissipation fins 7 are used to quickly dissipate heat in the middle section of the sound absorption channel 4. And the top end of the sound absorption channel 4 extends to the outside of the noise reduction cavity 1. A shutter 8 is installed at the outer end of the sound absorption channel 4, and a filter plate 9 is installed in the sound absorption channel 4 near the shutter 8. The filter plate 9 prevents foreign impurities from entering the sound absorption channel 4, so that the heat dissipation efficiency can be improved and the service life of the sound absorption channel 4 can be extended.

[0039] See Figure 3 and Figure 4 , sound absorption pipes 5 are arranged on the inner wall surface of the sound absorption channel 4. The sound absorption pipes 5 are arranged at equal intervals on the four inner walls of the sound absorption channel 4. The sound absorption pipes 5 are attached to the inner wall of the sound absorption channel 4. The sound absorption pipes 5 are specifically isosceles trapezoidal pipes. The bottom ends of the sound absorption pipes 5 are fixed on the inner wall of the sound absorption channel 4, and the initial stage noise reduction operation in the sound absorption channel 4 is completed through the sound absorption pipes 5.

[0040] See Figure 5 and Figure 6 , a noise reduction and sound absorption cylinder 6 is arranged in the middle of the sound absorption channel 4. The noise reduction and sound absorption cylinder 6 includes a square cylinder 61. A noise reduction pad 64 is arranged in the square cylinder 61. A plurality of first sound absorption sheets 62 are uniformly arranged at the lower end of the noise reduction pad 64 in the square cylinder 61. A plurality of second sound absorption sheets 63 are uniformly arranged at the upper end of the noise reduction pad 64 in the square cylinder 61. The first sound absorption sheets 62 and the second sound absorption sheets 63 are shuttle-shaped. The first sound absorption sheets 62 and the second sound absorption sheets 63 are vertically arranged in the square cylinder 61. The noise reduction and sound absorption operation in the middle section of the sound absorption channel 4 is completed through the cooperation of the first sound absorption sheets 62 and the second sound absorption sheets 63.

[0041] The working process of the present utility model is as follows:

[0042] The present utility model first uses the sound insulation cavity groove 2 to complete the wrapping of the charging pile cooling fan, so that the circumferential noise of the cooling fan can be eliminated through the sound insulation cavity groove 2;

[0043] Then, the hot air generated by the cooling fan is sent into the sound absorption channel 4 through the connecting pipe 3. A circular buffer cavity is arranged at the bottom end of the sound absorption channel 4, and an arc-shaped outlet channel is also arranged at the top end of the sound absorption channel 4, so as to facilitate the mutual collision of the hot air in the circular or arc-shaped channels to achieve the purpose of sound absorption.

[0044] A plurality of sound absorption pipes 5 are arranged in the sound absorption channel 4 near the connecting pipe 3. The bottom ends of the sound absorption pipes 5 are fixed on the inner wall of the sound absorption channel 4, and the initial stage sound absorption and noise reduction operation in the sound absorption channel 4 is completed through the sound absorption pipes 5; A noise reduction and sound absorption cylinder 6 is fixed in the middle section of the sound absorption channel 4. The arrangement directions of the first sound absorption sheet 62 and the second sound absorption sheet 64 are perpendicular to each other, and the noise reduction and sound absorption operation in the middle section of the sound absorption channel 4 is completed through the cooperation of the first sound absorption sheet 62 and the second sound absorption sheet 64.

[0045] A noise reduction pad 64 is pasted between the first sound absorption sheet 62 and the second sound absorption sheet 64 on the inner wall of the square cylinder 61, and the noise reduction pad 64 cooperates with the first sound absorption sheet 62 and the second sound absorption sheet 64 to complete the noise reduction operation.

[0046] The apertures at both ends of the sound absorption channel 4 are larger than the aperture in the middle section, and a plurality of heat dissipation fins 7 are fixed on the outer side of the middle section of the sound absorption channel 4. The heat dissipation fins 7 are used to achieve the rapid heat dissipation operation in the middle section of the sound absorption channel 4, and at the same time improve the heat dissipation efficiency of the sound absorption channel.

[0047] The top end of the sound absorption channel 4 extends to the outside of the noise reduction cavity 1. A louver 8 is installed at the outer end of the sound absorption channel 4. The hot air is blown out by the louver 8 to complete the heat dissipation of the charging pile. A filter plate 9 is installed in the sound absorption channel 4 near the louver 8. The filter plate 9 is used to prevent foreign impurities from entering the sound absorption channel 4, so as to improve the heat dissipation efficiency and extend the service life of the sound absorption channel 4 at the same time.

[0048] The above is only the preferred embodiment of the present utility model, and it is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A noise reduction device for a charging pile, characterized in that: The invention comprises a noise reduction cavity (1), wherein a connected sound insulation cavity groove (2) and a sound silencing channel (4) are arranged in the noise reduction cavity (1); when the sound insulation cavity groove (2) is in operation, it covers the outside of the charging pile cooling fan; the outlet of the sound silencing channel (4) is arranged on the wall surface of the noise reduction cavity (1); sound absorbing cotton is arranged on the inner wall surface of the sound insulation cavity groove (2); and a sound silencing pipe (5) is arranged on the inner wall surface of the sound silencing channel (4).

2. The noise reduction device for a charging pile according to claim 1, characterized in that: The sound insulation cavity groove (2) is arranged at the bottom of the noise reduction cavity (1), and the opening of the sound insulation cavity groove (2) is arranged on the side wall surface of the noise reduction cavity (1); the outlet of the sound silencing channel (4) is arranged on the upper part of the side wall surface where the opening of the sound insulation cavity groove (2) is not arranged; the sound silencing channel (4) is an S-shaped structure.

3. The noise reduction device for a charging pile according to claim 2, characterized in that: One side wall surface of the lower portion of the silencer channel (4) is in an arc shape; and one side wall surface of the upper portion of the silencer channel (4) is in an arc shape.

4. The noise reduction device for a charging pile according to claim 2, characterized in that: The hole diameter in the middle of the sound insulation cavity groove (2) is smaller than the hole diameters at both ends.

5. The noise reduction device for a charging pile according to claim 2, characterized in that: A noise reduction silencer (6) is arranged in the middle of the silencer channel (4); the noise reduction silencer (6) comprises a square tube (61), a noise reduction pad (64) is arranged in the square tube (61), a plurality of first silencer sheets (62) are evenly arranged at the lower end of the noise reduction pad (64) in the square tube (61), and a plurality of second silencer sheets (63) are evenly arranged at the upper end of the noise reduction pad (64) in the square tube (61).

6. The noise reduction device for a charging pile according to claim 5, characterized in that: The first sound-absorbing plate (62) and the second sound-absorbing plate (63) are shuttle-shaped; the first sound-absorbing plate (62) and the second sound-absorbing plate (63) are vertically arranged in the square tube (61).

7. The noise reduction device for a charging pile according to claim 2, characterized in that: A plurality of heat dissipation fins (7) are arranged on the middle outer wall surface of the sound insulation cavity (2).

8. The noise reduction device for a charging pile according to claim 1, characterized in that: A filter plate (9) is provided at the outlet of the muffler channel (4), and a shutter (8) is provided on the outer side of the filter plate (9).

9. The noise reduction device for a charging pile according to claim 1, characterized in that: The silencer pipe (5) is an isosceles trapezoidal pipe.

10. The noise reduction device for a charging pile according to claim 1, characterized in that: The sound insulation cavity (2) and the sound absorbing channel (4) are connected via a connecting pipe (3).

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