Noise reduction structure and charging equipment

Abstract

The utility model discloses a noise reduction structure and charging equipment, the noise reduction structure comprises a shell, a module group and a plurality of cooling fans, the shell is provided with a first side plate, a third side plate and a second side plate which are connected in sequence, the first side plate and the second side plate are oppositely arranged in a first direction, the first side plate is provided with an air outlet, and the third side plate is provided with an air inlet; the module group comprises a plurality of modules which are arranged in the shell at intervals in the second direction and the third direction, the thickness direction of the modules is the same as the second direction, gaps are formed between the modules and the shell, exhaust outlets are formed in the sides, facing the first side plate, of the modules, and air channels perpendicular to the second direction and the third direction are formed in the peripheries of the modules; in the third direction, the air inlet and the module group are staggered; the plurality of heat dissipation fans are arranged on one side, facing the second side plate, of each module. According to the air conditioner, noise generated by the cooling fan can be exhausted from the air inlet only after being reflected by multiple directions, and the noise reduction effect is good.

Description

Technical Field

[0001] The present application relates to the technical field of noise reduction, and in particular to a noise reduction structure and a charging device. Background Art

[0002] A charging pile is a charging device that provides DC power to electric vehicle batteries. When the charging pile is charging, the cooling fan inside its shell will dissipate heat from the charging module.

[0003] Traditional DC charging piles usually have an air inlet at the position of the shell closest to the cooling fan. The power and speed of the cooling fan are relatively high, resulting in a large amount of noise when the cooling fan is working. The noise generated by the cooling fan can easily be transmitted from the air inlet, causing adverse effects. Utility Model Content

[0004] The main purpose of the present application is to provide a noise reduction structure and a charging device, aiming to solve the problem that the noise generated by the cooling fan is easily transmitted from the air inlet.

[0005] To achieve the above-mentioned purpose, the present application provides a noise reduction structure, which includes a shell, a module group and a plurality of heat dissipation fans, the shell having a first side panel, a third side panel and a second side panel connected in sequence, the first side panel and the second side panel are arranged opposite to each other in a first direction, the first side panel is provided with an air outlet, and the third side panel is provided with an air inlet, and the first direction is the same as the length direction of the shell; the module group includes a plurality of modules arranged in the shell in a second direction and a third direction at intervals, the thickness direction of the module is the same as the second direction and there is a gap between the module and the shell, an exhaust port is provided on a side of the module facing the first side panel, an air duct perpendicular to the second direction and the third direction is formed on the periphery of the module, the second direction is the same as the width direction of the shell, and the third direction is the same as the height direction of the shell, wherein the air inlet and the module group are staggered in the third direction; a plurality of heat dissipation fans are arranged on a side of each module facing the second side panel.

[0006] Optionally, the noise reduction structure also includes a partition plate, which is arranged in the shell and divides the interior of the shell into a first area and a second area in the first direction; wherein the air outlet is located in the first area, the air inlet, the module group and the cooling fan are all located in the second area, and the exhaust port is connected to the first area.

[0007] Optionally, the shell also has a top plate and a bottom plate arranged relative to each other in the third direction, the module is located on the side of the air inlet facing away from the bottom plate, and an exhaust assembly is provided on the side of the first side panel facing the second side panel; the exhaust assembly includes a hood and an exhaust fan, the hood and the first side panel form an air outlet channel, one end of the air outlet channel corresponds to the air outlet, and the other end is located on the side of the air outlet close to the top plate; the exhaust fan is connected to the hood and is located at the end of the air outlet channel away from the air outlet.

[0008] Optionally, the air hood has an inclined plate connected to the first side panel, and the inclined plate is located on the side of the air hood close to the bottom plate; wherein the connection area between the inclined plate and the first side panel is located on the side of the air outlet close to the bottom plate; in the direction away from the first side panel, the distance between the inclined plate and the bottom plate gradually increases.

[0009] Optionally, the air outlet direction of the exhaust fan is toward the air outlet and the angle between the exhaust fan and the first side panel is less than 90°; the air outlet direction of the exhaust fan is less than 90° between the exhaust fan and the second side panel.

[0010] Optionally, there are multiple air outlets and they are spaced apart in the third direction; there are also multiple exhaust fans and they are spaced apart in the third direction; wherein, the minimum distance between the exhaust fan close to the bottom plate and the bottom plate is a, the minimum distance between the exhaust outlet close to the bottom plate and the bottom plate is b, and a≤b.

[0011] Optionally, the noise reduction structure further includes a dustproof net, which is arranged at the air inlet and connected to the third side panel.

[0012] Optionally, the noise reduction structure further includes a noise reduction plate, which is disposed at the air inlet and connected to the third side panel.

[0013] Optionally, the noise reduction plate includes a plurality of wave groups arranged in sequence in the third direction, the wave group includes two wave plates arranged in the third direction, each of the wave plates is a wave-like structure and is parallel to the third direction; wherein, within the same wave group, the crest of one wave plate corresponds to the trough of another wave plate.

[0014] In addition, to achieve the above-mentioned purpose, an embodiment of the present application also provides a charging device, including the above-mentioned noise reduction structure.

[0015] A noise reduction structure proposed in an embodiment of the present application, when the heat dissipation fan arranged on each module is working, the wind flow near the air inlet is blown to the inside of the corresponding module, the components inside the module are cooled, and then the module is discharged from the air outlet of each module, and the discharged wind flow is further discharged from the shell through the air outlet; wherein, the heat dissipation fan is arranged on the side of the module facing the second side plate, the third side plate where the air inlet is located is perpendicular to the second side plate, and the air inlet and each module are arranged at intervals in the third direction, in other words, the air inlet and the heat dissipation fan are misaligned in the third direction, and the air inlet and the heat dissipation fan are also misaligned in the second direction, so that the noise generated by the heat dissipation fan needs to be reflected in multiple directions before it can be discharged from the air inlet, and part of the sound wave will be absorbed when the sound wave is reflected, and the multiple reflections greatly increase the propagation path of the sound wave, so that the sound wave is further attenuated, and finally noise reduction can be achieved. In addition, the periphery of multiple modules forms an air duct perpendicular to the second direction and perpendicular to the third direction, so that the periphery of each module has a large contact area with the wind flow, so that the heat dissipation effect of each module is also better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a noise reduction structure provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 The cross-sectional structure of the embodiment in FIG. Figure 1 ;

[0018] Figure 3 for Figure 1 A schematic structural diagram of another perspective view of the embodiment;

[0019] Figure 4 for Figure 1 The cross-sectional structure of the embodiment in FIG. Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the internal structure of the housing according to an embodiment of the present application;

[0021] Figure 6 for Figure 1 The cross-sectional structure of the embodiment in FIG. Figure 3 ;

[0022] Figure 7 This is a schematic diagram of the noise reduction plate structure of an embodiment of the present application.

[0023] In the figure: 11, first side panel; 111, air outlet; 12, second side panel; 13, third side panel; 131, air inlet; 14, top panel; 15, bottom panel; 21, module; 3, cooling fan; 4, partition panel; 51, wind hood; 511, inclined panel; 52, exhaust fan; 6, dust screen; 7, corrugated panel.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] refer to Figure 1 to Figure 7The embodiment of the present application provides a noise reduction structure, which may include a shell, a module group and a plurality of heat dissipation fans 3, the shell having a first side panel 11, a third side panel 13 and a second side panel 12 connected in sequence, the first side panel 11 and the second side panel 12 are arranged opposite to each other in a first direction, an air outlet 111 is arranged on the first side panel 11, and an air inlet 131 is arranged on the third side panel 13, and the first direction is the same as the length direction of the shell; the module group may include a plurality of modules 21 arranged in the shell in a second direction and a third direction, the thickness direction of the module 21 is the same as the second direction and there is a gap between the module 21 and the shell, an air outlet is arranged on the side of the module 21 facing the first side panel 11, and an air duct perpendicular to the second direction and the third direction is formed on the periphery of the module 21, the second direction is the same as the width direction of the shell, and the third direction is the same as the height direction of the shell, wherein the air inlet 131 and the module group are staggered in the third direction; and a plurality of heat dissipation fans 3 are arranged on the side of each module 21 facing the second side panel 12.

[0030] A noise reduction structure is proposed in the embodiment of the present application. When the heat dissipation fan 3 arranged on each module 21 is in operation, the wind flow near the air inlet 131 is blown to the inside of the corresponding module 21 to cool the components inside the module 21, and then the wind flow is discharged from the module 21 from the air outlet of each module 21, and the discharged wind flow is further discharged out of the shell through the air outlet 111; wherein, the heat dissipation fan 3 is arranged on the side of the module 21 facing the second side plate 12, the third side plate 13 where the air inlet 131 is located is perpendicular to the second side plate 12, and the air inlet 131 and each module 21 are arranged at intervals in the third direction. In other words, the air inlet 131 and the heat dissipation fan 3 are offset in the third direction, and the air inlet 131 and the heat dissipation fan 3 are also offset in the second direction. In this way, the noise generated by the heat dissipation fan 3 needs to be reflected in multiple directions before it can be discharged from the air inlet 131. When the sound wave is reflected, part of the sound wave will be absorbed. At the same time, the multi-directional reflection greatly increases the sound wave propagation path, so that the sound wave is further attenuated, and finally noise reduction can be achieved. In addition, the peripheries of the multiple modules 21 form wind ducts that are perpendicular to the second direction and the third direction, so that the periphery of each module 21 has a large contact area with the wind flow, so that the heat dissipation effect of each module 21 is also better.

[0031] Specifically, Figure 1 and Figure 3 As shown, the first direction is the X direction, the second direction is the Y direction, and the third direction is the Z direction. The shell can be a rectangle, and the first direction X can be the same as the length direction of the shell, the second direction Y can be the same as the width direction of the shell, and the third direction Z can be the same as the height direction of the shell. When the noise reduction structure is used, the third direction Z can be the same as the gravity direction, and the first side plate 11, the second side plate 12 and the third side plate 13 are all perpendicular to the horizontal plane.

[0032] Among them, Figure 1 Taking the middle perspective as the main view of the noise reduction structure, the first side panel 11 can be understood as the left panel, the second side panel 12 can be understood as the right panel, and the third side panel 13 can be understood as the back panel; the heat dissipation fan 3 is located on the side of the module 21 facing the second side panel 12, and the air inlet 131 is located on the third side panel 13, which can be understood as the heat dissipation fan 3 and the air inlet 131 are misaligned in the second direction Y; in this way, in the third direction Z, the air inlet 131 is spaced apart from the module group, which can be understood as the heat dissipation fan 3 and the air inlet 131 are misaligned in the third direction Z. Compared with the traditional solution, the noise needs to be reflected in multiple directions before it can be transmitted out of the air inlet 131. Whether the sound wave propagates in the medium or is reflected when encountering an obstacle, it will cause the attenuation of the sound wave energy, thereby ultimately achieving noise reduction.

[0033] In the third direction Z, the module group may be located above the air inlet 131 or below the air inlet 131 .

[0034] It should be understood that if Figure 2 to Figure 6 As shown, the module 21 may be rectangular, and each module 21 has an air duct perpendicular to the second direction Y and perpendicular to the third direction Z on its periphery, so that the module 21 has a better heat dissipation effect.

[0035] Optionally, the air outlet 111 and the exhaust port can be connected. For example, the air outlet 111 and the exhaust port can be connected by a tubular member, so that the hot air discharged from the exhaust port will not flow back to the heat dissipation fan 3, thereby ensuring the heat dissipation effect; at the same time, the noise of the heat dissipation fan 3 is difficult to be discharged from the air outlet 111, thereby ensuring the noise reduction effect.

[0036] refer to Figure 2 In an exemplary embodiment, the noise reduction structure may further include a partition plate 4, which is arranged in the shell and divides the interior of the shell into a first area and a second area in a first direction X; wherein the air outlet 111 is located in the first area, the air inlet 131, the module group and the heat dissipation fan 3 are all located in the second area, and the exhaust port is connected to the first area.

[0037] It should be noted that either the solution here or the solution of connecting the air outlet 111 and the exhaust port through a tubular member can be selected when the noise reduction structure is used.

[0038] Specifically, Figure 2 As shown, the partition plate 4 divides the first area and the second area. The temperature of the wind flow entering the second area from the air inlet 131 is lower, while the temperature of the wind flow discharged into the first area from the air outlet is higher. Therefore, when the noise reduction structure is used, the temperature of the second area is lower than that of the first area, and the module 21 is in the second area, that is, the module 21 works in the low temperature area, thereby reducing the rotation speed of the heat dissipation fan 3 when it is working. While ensuring the heat dissipation effect, the noise generated by the heat dissipation fan 3 when it is working can be further reduced.

[0039] It should be understood that the partition plate 4 can also ensure that the hot air discharged from the exhaust port will not flow back to the heat dissipation fan 3 and thus will not affect normal heat dissipation; at the same time, the partition plate 4 can block the noise emitted by the heat dissipation fan 3 from being discharged from the air outlet 111, thereby enhancing the noise reduction effect of the noise reduction structure.

[0040] refer to Figure 2 In an exemplary embodiment, the shell further has a top plate 14 and a bottom plate 15 arranged relative to each other in a third direction Z, the module 21 is located on the side of the air inlet 131 away from the bottom plate 15, and an exhaust assembly is provided on the side of the first side plate 11 facing the second side plate 12; the exhaust assembly may include a hood 51 and an exhaust fan 52, the hood 51 and the first side plate 11 form an air outlet channel, one end of the air outlet channel corresponds to the air outlet 111, and the other end is located on the side of the air outlet 111 close to the top plate 14; the exhaust fan 52 is connected to the hood 51 and is located at one end of the air outlet channel away from the air outlet 111.

[0041] Specifically, the exhaust fan 52 can draw the hot air in the first area into the air outlet channel and discharge it from the air outlet 111.

[0042] One end of the air outlet channel corresponds to the air outlet 111, and the other end is located on the side of the air outlet 111 away from the bottom plate 15. Figure 2 As shown, one end of the air outlet flow channel away from the air outlet 111 is located above the air outlet 111. In this way, if external impurities enter the air outlet flow channel from the air outlet 111, the impurities will fall below the air outlet flow channel due to gravity restriction, that is, the impurities will not contact the heat dissipation fan 3 above the air outlet flow channel, nor will they further enter the shell.

[0043] It should be understood that one end of the air outlet flow channel corresponds to the air outlet 111 which means that one end of the air outlet flow channel is connected to the air outlet 111 .

[0044] It should be noted that the module 21 is located above the air inlet 131, so that the exhaust fan 52 can be located above the air outlet 111 and correspond to the area where the exhaust outlet of the module 21 is located, thereby achieving a good exhaust effect. If the module 21 is arranged below the air inlet 131, the overall center of the noise reduction structure moves downward, and it is more stable during operation. However, the exhaust fan 52 needs to be located above the air outlet 111, so that the airflow discharged from the exhaust outlet close to the bottom plate 15 is not easily extracted by the exhaust fan 52 above, resulting in a poor heat dissipation effect.

[0045] refer to Figure 2In an exemplary embodiment, the air hood 51 has an inclined plate 511 connected to the first side plate 11, and the inclined plate 511 is located on the side of the air hood 51 close to the bottom plate 15; wherein the connection area between the inclined plate 511 and the first side plate 11 is located on the side of the air outlet 111 close to the bottom plate 15; in the direction away from the first side plate 11, the distance between the inclined plate 511 and the bottom plate 15 gradually increases.

[0046] Specifically, Figure 2 As shown, in the direction away from the first side plate 11, the distance between the inclined plate 511 and the bottom plate 15 gradually increases. In other words, the side of the inclined plate 511 close to the air outlet 111 is lower than the side of the inclined plate 511 away from the air outlet 111, and the connection area between the inclined plate 511 and the first side plate 11 is located on the side of the air outlet 111 close to the bottom plate 15, so that impurities entering the air outlet 111 will fall onto the inclined plate 511 due to their own gravity and roll, and are finally discharged from the air outlet 111.

[0047] In addition, the exhaust fan 52 blowing air toward the air outlet 111 can further prevent impurities from entering the air outlet 111 .

[0048] refer to Figure 2 and Figure 6 In an exemplary embodiment, the air outlet direction of the exhaust fan 52 is toward the air outlet 111 and the angle between the exhaust fan 52 and the first side panel 11 is less than 90°; the air outlet direction of the exhaust fan 52 and the angle between the exhaust fan 52 and the second side panel 12 is less than 90°.

[0049] Specifically, Figure 2 and Figure 6 As shown, the exhaust fan 52 is tilted, and the angles between the air outlet direction of the exhaust fan 52 and the first side panel 11 and the third side panel 13 can be 30°. In this way, the noise generated by the exhaust fan 52 when it is working will first contact the side wall of the wind cover 51 and the first side wall and be reflected multiple times before being discharged from the air outlet 111, thereby reducing the noise generated by the exhaust fan 52 when it is working.

[0050] refer to Figure 2 In an exemplary embodiment, there are multiple air outlets 111 and they are spaced apart in the third direction Z; there are also multiple exhaust fans 52 and each exhaust fan 52 is spaced apart in the third direction Z; wherein, the minimum distance between the exhaust fan 52 close to the bottom plate 15 and the bottom plate 15 is a, and the minimum distance between the exhaust outlet close to the bottom plate 15 and the bottom plate 15 is b, and a≤b.

[0051] Specifically, Figure 2 As shown, multiple exhaust fans 52 are spaced apart in the third direction Z, which can effectively increase the exhaust volume from the first area to the air outlet 111, so that the hot air flow in the first area can be quickly discharged, further ensuring the overall heat dissipation effect.

[0052] The exhaust fan 52 near the bottom plate 15 is the lowest exhaust fan 52, which can be recorded as the lower fan, and the exhaust port near the bottom plate 15 is the lowest exhaust port among all the exhaust ports on the partition module 21; when a≤b, such as Figure 2 As shown, the hot air discharged from each exhaust port is almost all above the lowest fan, and each exhaust fan 52 exhausts air toward the upper right, so that the exhaust effect of each exhaust fan 52 can be guaranteed.

[0053] refer to Figure 4 and Figure 5 In an exemplary embodiment, the noise reduction structure may further include a dustproof net 6 , which is disposed at the air inlet 131 and connected to the third side plate 13 .

[0054] The dustproof net 6 is arranged in the shell to prevent dust and ash from collecting, and prevent too much dust or mosquitoes from entering the air inlet 131.

[0055] refer to Figure 7 In an exemplary embodiment, the noise reduction structure may further include a noise reduction plate, which is disposed at the air inlet 131 and connected to the third side plate 13 .

[0056] Among them, the noise reduction plate at the air inlet and outlet 131 can further prevent the noise from being transmitted from the air inlet 131, and the noise reduction plate is arranged in the shell.

[0057] In an exemplary embodiment, the noise reduction plate may include a plurality of wave groups arranged in sequence in a third direction Z, and the wave group may include two wave plates 7 arranged in the third direction Z, each wave plate 7 is a wave-like structure and is parallel to the third direction Z; wherein, within the same wave group, the crest of one wave plate 7 corresponds to the trough of another wave plate 7.

[0058] Specifically, Figure 7 As shown, each wave plate 7 is a wave-shaped structure, and is parallel to the third direction Z. Each wave plate 7 has a crest and a trough. Taking the side of the noise reduction plate away from the third side plate 13 as a reference, the convex part on this side is recorded as a crest, and the concave part is recorded as a trough. Then, in the same wave group, in the third direction Z, the crest of one wave plate 7 corresponds to the trough of another wave plate 7, so that a through hole is formed between the corresponding crests and troughs in the third direction Z, and the through hole connects the two opposite sides of the noise reduction plate in the second direction Y, that is, the wind flow at the air inlet 131 can pass through the through hole. In other words, the noise reduction plate will not affect the normal operation of the air inlet 131; at the same time, in the second direction Y, the noise reduction plate is in a closed state, that is, the two sides are not connected, the reflection and absorption effect of noise is better, and the noise reduction effect is further improved.

[0059] Among them, in the second direction Y, the noise reduction plate is in a closed state. It can be understood that when observing the noise reduction plate along the second direction Y, the noise reduction plate is a complete rectangle, and sound waves can hardly pass through the noise reduction plate along the second direction Y.

[0060] It should be noted that the noise reduction plate in the present application can be formed by injection molding, and the size of the coverage area of ​​the noise reduction plate on the third side plate 13 can be adjusted according to the number of spliced ​​corrugated plates 7, such as Figure 7 As shown, the longer the length of a single wave plate 7 is, the more wave plates 7 the noise reduction plate includes, and the larger the coverage area is. The specific coverage area of ​​the noise reduction plate can be selected according to actual conditions. For example, the noise reduction plate should cover the air inlet.

[0061] The length of the corrugated plate 7 refers to the length of the corrugated plate 7 in the first direction X.

[0062] Based on the above embodiments, an embodiment of the present application further provides a charging device, which may include the above-mentioned noise reduction structure.

[0063] Specifically, the charging device can be a charging pile, and the shell can be the outer shell of the charging pile. Module 21 is the charging module inside the charging pile. When the charging pile is charging, the charging module starts to work, and the heat dissipation fan 3 dissipates heat for the charging module. The heat dissipation fan 3 and the air inlet 131 are offset in the third direction Z and the second direction Y, thereby effectively reducing the noise generated when the charging pile is working.

[0064] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A noise reduction structure, characterized in that: include: A shell, comprising a first side plate (11), a third side plate (13) and a second side plate (12) connected in sequence, the first side plate (11) and the second side plate (12) being arranged opposite to each other in a first direction, the first side plate (11) being provided with an air outlet (111), the third side plate (13) being provided with an air inlet (131), and the first direction being the same as a length direction of the shell; A module group, comprising a plurality of modules (21) arranged in a second direction and a third direction in a spaced relationship within the shell, the thickness direction of the module (21) being the same as the second direction and a gap being provided between the module (21) and the shell, an air outlet being provided on a side of the module (21) facing the first side plate (11), an air duct being perpendicular to the second direction and the third direction being formed around the periphery of the module (21), the second direction being the same as the width direction of the shell, and the third direction being the same as the height direction of the shell, wherein the air inlet (131) and the module group are staggered in the third direction; A plurality of heat dissipation fans (3) are arranged on a side of each module (21) facing the second side plate (12).

2. The noise reduction structure according to claim 1, characterized in that: The noise reduction structure also includes: A partition plate (4) is disposed in the shell and divides the interior of the shell into a first area and a second area in the first direction; The air outlet (111) is located in the first area, the air inlet (131), the module group and the heat dissipation fan (3) are all located in the second area, and the air outlet is connected to the first area.

3. The noise reduction structure according to claim 1, characterized in that: The housing further comprises a top plate (14) and a bottom plate (15) arranged opposite to each other in the third direction; the module (21) is located on a side of the air inlet (131) away from the bottom plate (15); an exhaust assembly is provided on a side of the first side plate (11) facing the second side plate (12); the exhaust assembly comprises: An air hood (51) and the first side plate (11) enclose an air outlet channel, one end of the air outlet channel corresponds to the air outlet (111), and the other end is located on a side of the air outlet (111) close to the top plate (14); An exhaust fan (52) is connected to the wind cover (51) and is located at an end of the air outlet flow channel away from the air outlet (111).

4. The noise reduction structure according to claim 3, characterized in that: The wind shield (51) has an inclined plate (511) connected to the first side plate (11), and the inclined plate (511) is located on a side of the wind shield (51) close to the bottom plate (15); Wherein, the connection area between the inclined plate (511) and the first side plate (11) is located on a side of the air outlet (111) close to the bottom plate (15); In a direction away from the first side plate (11), the distance between the inclined plate (511) and the bottom plate (15) gradually increases.

5. The noise reduction structure according to claim 3, characterized in that: The air outlet direction of the exhaust fan (52) is toward the air outlet (111) and the included angle with the first side plate (11) is less than 90°; The angle between the air outlet direction of the exhaust fan (52) and the second side plate (12) is less than 90°.

6. The noise reduction structure according to claim 3, characterized in that: There are a plurality of air outlets (111) which are arranged at intervals in the third direction; There are also a plurality of exhaust fans (52), and each of the exhaust fans (52) is arranged at intervals in the third direction; The minimum distance between the exhaust fan (52) close to the bottom plate (15) and the bottom plate (15) is a, the minimum distance between the exhaust port close to the bottom plate (15) and the bottom plate (15) is b, and a≤b.

7. The noise reduction structure according to claim 1, characterized in that: The noise reduction structure also includes: A dustproof net (6) is arranged at the air inlet (131) and connected to the third side plate (13).

8. The noise reduction structure according to claim 1, characterized in that: The noise reduction structure also includes: A noise reduction plate is arranged at the air inlet (131) and connected to the third side plate (13).

9. The noise reduction structure according to claim 8, characterized in that: The noise reduction plate comprises a plurality of wave groups arranged in sequence in the third direction, the wave group comprises two wave plates (7) arranged in the third direction, each of the wave plates (7) is a wave-shaped structure and is parallel to the third direction; Wherein, within the same wave group, the wave crest of one wave plate (7) corresponds to the wave trough of another wave plate (7).

10. A charging device, characterized in that: include: The noise reduction structure according to any one of claims 1 to 9.

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