Ventilation and noise reduction type external louver box

Abstract

This utility model discloses a ventilation and noise reduction type external louvered box, which is assembled on the side and / or end face of a charging pile. The louvered box includes a shell with a hollow cavity. Inside the shell, a set of equidistant sheet metal parts are arranged in the shape of isosceles trapezoids, with their trapezoidal end faces fixed to the shell on both sides. Each sheet metal part has a first inclined surface and a second inclined surface. The first inclined surface is vertically arranged inside the shell, and the second inclined surface is horizontally arranged inside the shell. The angle formed between the bottom surface of the sheet metal part and the horizontal plane is an acute angle. The sheet metal part has a built-in receiving cavity, which is filled with glass wool wrapped with hydrophobic fiberglass cloth. The main advantages of this utility model are: it can effectively reduce noise without affecting ventilation and heat dissipation, achieving a good balance between noise reduction and ventilation. Furthermore, this louvered box is directly installed at the air inlet and outlet on the side or end face of the charging pile, requiring no additional space, having no site requirements, facilitating reasonable layout, and having wide applicability.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection, noise reduction, and energy-saving control, and more specifically, to a ventilation and noise reduction type external louvered box. Background Technology

[0002] Charging piles function similarly to gas pumps at gas stations. They can be fixed to the ground or walls and installed in public buildings, residential parking lots, or charging stations. They can charge various models of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: regular charging and fast charging. People can use a specific charging card to swipe on the human-machine interface provided by the charging pile to perform corresponding operations such as charging method, charging time, and printing of cost data. The charging pile display screen can display data such as charging amount, cost, and charging time.

[0003] Charging piles generate heat during the charging process. If the heat cannot be dissipated in time, the internal component boards of the charging pile will be easily damaged at high temperatures. Therefore, heat dissipation treatment is required for charging piles, and a fan structure is usually used for heat dissipation.

[0004] For example, patent application CN 217574888 U discloses an intelligent control fan cooling system for charging piles, including a charging pile body and a heat-generating component fixedly installed in the middle of the charging pile body. The charging pile body has a heat dissipation assembly for cooling the heat-generating component, which includes a heat dissipation pipe fixedly installed in the middle of the charging pile body, a cooling fan fixedly installed at one end of the heat dissipation pipe, and a flow pipe fixedly installed at the air outlet of the heat dissipation pipe for dissipating hot air. An air inlet is provided inside the charging pile body. However, this system generates a significant amount of noise during the cooling process, primarily from the fan inside the charging pile and the system's fan. This noise is considerable and may affect the rest quality of residents on lower floors. Currently, the industry typically addresses noise reduction by blocking noise transmission paths, such as installing soundproof covers, setting up sound barriers, or constructing green isolation belts. Sound barriers and green isolation belts require a certain amount of space around the charging pile, and the cost-effectiveness of using sound barriers for a single charging pile is not high. Adding traditional soundproof covers reduces the ventilation area, which affects the cooling effect when the charging pile operates at full load for extended periods. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a ventilation and noise reduction type external louver box.

[0006] The objective of this utility model is achieved through the following technical solution: A ventilation and noise reduction type external louvered box is assembled on the side and / or end face of a charging pile. The louvered box includes a shell with a hollow cavity. The shell contains a set of equidistant sheet metal parts. The sheet metal parts are in the shape of an isosceles trapezoid, and the trapezoidal end faces on both sides are fixedly mounted on the shell. Each sheet metal part has a first inclined surface and a second inclined surface. The first inclined surface is vertically arranged in the shell, and the second inclined surface is horizontally arranged in the shell. The angle formed between the bottom surface of the sheet metal part and the horizontal plane is an acute angle. The sheet metal part has a receiving cavity, and the receiving cavity is filled with glass wool wrapped with water-repellent fiberglass cloth.

[0007] Preferably, the angle between the bottom surface of the sheet metal part and the horizontal plane is 45°.

[0008] Preferably, the distance between adjacent sheet metal parts is 70-80% of the distance between the top and bottom surfaces of the sheet metal parts.

[0009] Preferably, the sheet metal part is an aluminum alloy part or a galvanized part with powder coating.

[0010] Preferably, the distance between the top and bottom surfaces of the sheet metal part is 50mm.

[0011] Preferably, the sheet metal part is formed by riveting two bent parts and has an opening with a diameter of 1-2 mm and an opening ratio of 20-30%.

[0012] Preferably, the housing includes a rectangular support cover, an outer side plate is fixed to the outer side of the support cover, and an inner side plate is fixed to the inner side of the support cover. The inner side plate is bolted to the side and / or end face of the charging pile.

[0013] Preferably, the support cover has a receiving cavity, and the receiving cavity is filled with glass wool wrapped with water-repellent fiberglass cloth.

[0014] Preferably, the support cover is an aluminum alloy perforated plate or a galvanized perforated plate powder coated with powder.

[0015] The beneficial effects of this utility model are mainly reflected in: 1. This louvered box features an ingenious design and a reasonable layout, effectively reducing noise without affecting ventilation and heat dissipation, achieving a good balance between noise reduction and ventilation. Furthermore, the louvered box is directly installed at the air inlet and outlet on the side or end face of the charging station, requiring no additional space, having no site requirements, facilitating reasonable layout, and possessing wide applicability.

[0016] 2. The second inclined surface and the bottom surface together form a horn-shaped cavity. After the noise is transmitted from the side or end face of the charging pile, it enters the horn-shaped cavity and the rectangular cavity formed by the bottom and top surfaces, causing the sound waves to be reflected, resonated or interfered, thereby reducing the mid-to-low frequency noise.

[0017] 3. When noise propagates through the openings in the sheet metal parts, it converts sound energy into heat energy through friction and adhesion with the glass wool, thus attenuating mid-to-high frequency noise. At the same time, the properties of hydrophobic fiberglass cloth and glass wool determine that they have the characteristics of high temperature resistance, fire resistance, water resistance and good weather resistance, which can reduce mid-to-high frequency noise while ensuring heat dissipation meets the standards.

[0018] 4. This application uses glass wool because of its excellent sound absorption, fire resistance, and high temperature resistance properties, which offer high cost-effectiveness. Furthermore, the hydrophobic fiberglass cloth provides fire resistance and high temperature resistance while preventing moisture penetration, thus providing excellent insulation and maximizing the service life of the glass wool.

[0019] 5. The shell structure is simple, ingeniously designed, and rationally laid out, facilitating assembly and greatly improving work efficiency. Furthermore, the shape of the support cover and the arrangement of the glass wool further attenuate high-frequency noise, thereby reducing mid-to-high-frequency noise even more significantly.

[0020] 6. Sheet metal parts are formed by riveting two bent parts. This forming method is stable and reliable, easy to process, and greatly improves assembly efficiency. Attached Figure Description

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings: Figure 1 : A perspective view of a preferred embodiment of the present invention; Figure 2 : Front view of a preferred embodiment of this utility model; Figure 3 : Figure 2 Sectional view of AA; Figure 4 : Figure 2 A cross-sectional view of BB. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 4 As shown, this utility model discloses a ventilation and noise reduction type external louvered box. This louvered box is mounted on the side and / or end face of a charging pile, and its installation position can be adjusted according to actual needs, greatly improving convenience and assembly efficiency. Furthermore, since this louvered box is directly installed at the air inlet and outlet on the side or end face of the charging pile, it requires no additional space, has no site requirements, facilitates reasonable layout, and has wide applicability.

[0027] In this utility model, the louvered box includes a shell 1 with a hollow cavity. A set of equidistant sheet metal parts 2 are housed within the shell 1. Preferably, the distance between adjacent sheet metal parts 2 is 70-80% of the distance between the top surface 24 and the bottom surface 23 of the sheet metal parts 2. More preferably, the distance between adjacent sheet metal parts 2 is 78% of the distance between the top surface 24 and the bottom surface 23 of the sheet metal parts 2. That is, the distance between adjacent sheet metal parts 2 depends on the ratio of the actual air inlet / outlet area of ​​the charging pile to the overall area of ​​the louvers. This design is the optimal embodiment of this application, achieving the best noise reduction effect while ensuring heat dissipation.

[0028] Furthermore, the sheet metal part 2 is an aluminum alloy part or a galvanized part with powder coating. Specifically, the sheet metal part 2 is in the shape of an isosceles trapezoid and is formed by riveting two bent parts. This forming method is stable and reliable, easy to process, and greatly improves assembly efficiency.

[0029] Each sheet metal part 2 has a first inclined surface 21 and a second inclined surface 22. The first inclined surface 21 is vertically arranged inside the housing 1, and the second inclined surface 22 is horizontally arranged inside the housing 1. The angle formed between the bottom surface 23 of the sheet metal part 2 and the horizontal plane is an acute angle, preferably 45°. In the above, the second inclined surface 22 and the bottom surface 23 cooperate to form a horn-shaped cavity. After noise is transmitted from the side or end face of the charging pile, it enters the horn-shaped cavity and the rectangular cavity formed by the bottom surface 23 and the top surface 24, causing the sound waves to be reflected, resonated, or interfered, thereby reducing mid-to-low frequency noise.

[0030] The sheet metal part 2 has a 50mm distance between its top surface 24 and bottom surface 23, and contains a built-in receiving cavity. This cavity is filled with glass wool 3 wrapped in hydrophobic fiberglass cloth, with a density of 32-48 kg / m³. Glass wool 3 is preferred due to its excellent sound absorption, fire resistance, and high-temperature resistance, offering good value for money. Furthermore, the hydrophobic fiberglass cloth provides fire resistance and high-temperature resistance while preventing moisture penetration, thus providing excellent insulation and extending the service life of the glass wool 3. The sheet metal part 2 also has openings with a diameter of 1-2mm and an opening ratio of 20-30%. When noise propagates through these openings in the sheet metal part 2, the friction and adhesion with the glass wool 3 converts sound energy into heat energy, achieving mid-to-high frequency noise attenuation. The properties of the hydrophobic fiberglass cloth and glass wool 3 ensure high-temperature resistance, fire resistance, water resistance, and good weather resistance, reducing mid-to-high frequency noise while ensuring adequate heat dissipation.

[0031] The housing 1 is rectangular, and the trapezoidal end faces on both sides of the sheet metal part 2 are fixedly mounted on the support cover 11. An inner side plate 12 is fixedly mounted on the inner side of the support cover 11, and the inner side plate 12 is locked to the side and / or end face of the charging pile by bolts 13; an outer side plate 14 is fixedly mounted on the outer side of the support cover 11. In this application, the housing 1 has a simple structure, ingenious design, reasonable layout, and is easy to assemble, greatly improving work efficiency. Furthermore, the support cover 11 is made of aluminum alloy perforated plate or galvanized perforated plate with powder coating, and has an internal cavity containing glass wool 3 wrapped with hydrophobic fiberglass cloth. This arrangement further attenuates high-frequency noise and further reduces mid-to-high frequency noise.

[0032] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0033] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A ventilation and noise reduction type external louvered box, mounted on the side and / or end face of a charging pile, characterized in that: The Stevenson screen includes a shell (1) with a hollow cavity. The shell (1) contains a set of sheet metal parts (2) arranged at equal intervals. The sheet metal parts (2) are in the shape of an isosceles trapezoid, and the trapezoidal end faces on both sides are fixedly mounted on the shell (1). Each sheet metal part (2) has a first inclined surface (21) and a second inclined surface (22). The first inclined surface (21) is vertically arranged in the shell (1), and the second inclined surface (22) is horizontally arranged in the shell (1). The bottom surface (23) of the sheet metal part (2) forms an acute angle with the horizontal plane. The sheet metal part (2) has a receiving cavity, and the receiving cavity contains glass wool (3) wrapped with water-repellent fiberglass cloth.

2. The ventilation and noise reduction type external louvered box according to claim 1, characterized in that: The angle between the bottom surface of the sheet metal part (2) and the horizontal plane is 45°.

3. The ventilation and noise reduction type external louvered box according to claim 1, characterized in that: The distance between adjacent sheet metal parts (2) is 70-80% of the distance between the top surface (24) and the bottom surface (23) of the sheet metal parts (2).

4. The ventilation and noise reduction type external louvered box according to claim 1, characterized in that: The sheet metal part (2) is an aluminum alloy part or a galvanized part with powder coating.

5. The ventilation and noise reduction type external louvered box according to claim 1, characterized in that: The distance between the top surface (24) and the bottom surface (23) of the sheet metal part (2) is 50mm.

6. The ventilation and noise reduction type external louvered box according to claim 4, characterized in that: The sheet metal part (2) is formed by riveting two bent parts, and has an opening with a diameter of 1-2 mm. Its open area ratio is 20-30%.

7. The ventilation and noise reduction type external louvered box according to claim 4, characterized in that: The housing (1) includes a rectangular support cover (11), an outer side plate (14) is fixed on the outer side of the support cover (11), and an inner side plate (12) is fixed on the inner side of the support cover (11). The inner side plate (12) is locked to the side or / and end face of the charging pile by bolts (13).

8. The ventilation and noise reduction type external louvered box according to claim 7, characterized in that: The support cover (11) has a receiving cavity, which is filled with glass wool (3) wrapped with water-repellent fiberglass cloth.

9. The ventilation and noise reduction type external louvered box according to claim 7, characterized in that: The support cover (11) is an aluminum alloy perforated plate or a galvanized perforated plate with powder coating.

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