A mute charging pile

Abstract

The application discloses a mute charging pile and relates to the technical field of charging piles. The mute charging pile comprises a pile body, a pair of cable racks, air inlets and air outlets, elastic supporting mechanisms, mute adjusting covers, openings and a transmission adjusting mechanism. The cable racks are respectively installed on the two sides of the pile body. The air inlets and the air outlets are respectively arranged on the two sides of the pile body. The air inlets and the air outlets are respectively located below the cable racks. The elastic supporting mechanisms are inserted into the cable racks. The mute adjusting covers are respectively slidably installed outside the air inlets and the air outlets. The bottom of each mute adjusting cover is provided with an opening. The transmission adjusting mechanism is installed in the pile body and connected with the elastic supporting mechanisms and the mute adjusting covers. The air inlets and the air outlets are changed from the traditional horizontal louver form on the side to the downward position on the side of the pile body and are additionally provided with the mute adjusting covers which are extended downward. The design guides the air inlet and air outlet directions to the lower area of the charging pile, effectively absorbs and blocks sound waves and changes the direction of noise at the initial stage of propagation.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, specifically to a silent charging pile. Background Technology

[0002] During the use of electric vehicle charging stations, the operating noise of their internal components and heat dissipation systems has become a significant problem affecting the comfort of the surrounding environment. This noise mainly comes from the sound of components running, the whistling of airflow generated when the fan is running, the sound of the blades rotating, and the sound of high-speed airflow impacting the heat dissipation vent grille.

[0003] The existing patent application, with publication number CN117067966B and publication date of December 26, 2023, is entitled "A Charging Pile." It includes a housing, a cabinet door, a cable, and a winding mechanism. A storage cabinet is located inside the upper part of the housing. The winding mechanism includes a first limiting box, a first slider, a first connecting rod, a sliding winch, a second connecting rod, two second sliders, and two second limiting boxes. A first limiting groove extending along its length is formed on the right side of the first limiting box. One end of the first connecting rod is fixedly mounted on the first slider. A second limiting groove extending along its length is formed on the left or right side of the second limiting box. The sliding winch is fixedly mounted on the second connecting rod. One end of the cable is wound around the sliding winch, and a charging gun is fixedly mounted on the other end of the cable, which is mounted on the first connecting rod. This invention provides a charging pile to solve the problem of easily damaged cables in existing charging piles.

[0004] The above-mentioned application has shortcomings. To solve the heat dissipation problem of charging piles, horizontal louvered air inlets and outlets are usually used. The air outlets are straight, which allows the airflow noise generated by the cooling fan to spread horizontally to the surrounding environment without obstruction. The noise pollution range is large, and its open structure cannot effectively shield or guide the noise. When the charging pile is not charging and the heat dissipation requirement is low or no heat dissipation is required, the fan can stop or run at low speed. If noise is reduced by directly blocking the air outlets, the heat dissipation and moisture protection performance of the charging pile during low power consumption operation cannot be guaranteed. Summary of the Invention

[0005] The purpose of this invention is to provide a silent charging station to address the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A silent charging station includes a station body and a pair of cable racks installed on both sides of the station body. Air inlets and exhaust outlets are located on both sides of the station body, below the cable racks. An elastic support mechanism and a silent adjustment cover are inserted into the cable racks. Each silent adjustment cover is slidably installed outside the air inlet and exhaust outlet, with an opening at the bottom. A transmission adjustment mechanism is installed inside the station body and connected to both the elastic support mechanism and the silent adjustment cover. When the cable is attached to the cable rack, the elastic support mechanism is pressed down, and the transmission adjustment mechanism controls the silent adjustment cover to move upwards for heat dissipation.

[0008] Preferably, the pile body is provided with an air inlet channel connected to the air inlet and an exhaust channel connected to the air outlet, and sound insulation cotton is installed in both the exhaust channel and the air inlet channel.

[0009] Preferably, the elastic support mechanism includes a rod inserted through the top of the cable rack, a support plate fixedly connected to the top of the rod, and a top spring sleeved on the rod, with the two ends of the top spring abutting against the support plate and the cable rack respectively.

[0010] Preferably, the transmission adjustment mechanism includes a connecting frame slidably installed on the inner wall of the pile body, one side of the connecting frame being connected to the insertion rod, and the other side being connected to the silent adjustment cover.

[0011] Preferably, both sides of the inner wall of the air inlet and the air outlet are rotatably connected to transmission gears, the connecting frame is vertically provided with a drive rack that meshes with the transmission gears, and both sides of the inner wall of the silent adjustment cover are fixedly connected with driven racks that mesh with the transmission gears.

[0012] Preferably, an impeller is rotatably connected to the exhaust duct near the exhaust port, and the blades of the impeller are provided with sound-absorbing layers on both sides. An arc-shaped sound-absorbing pad is fixedly connected to the exhaust duct below the impeller.

[0013] Preferably, a baffle plate is hinged to the inner wall of the exhaust duct above the impeller, and a pair of wedge-shaped top blocks that abut against the baffle plate are fixedly connected to the inner side of the connecting frame. When the cable is attached to the elastic support mechanism, one side of the baffle plate is in contact with the inner wall of the exhaust duct. When the cable leaves the elastic support mechanism, the connecting frame, along with the wedge-shaped top blocks, pushes the baffle plate from bottom to top, causing it to tilt.

[0014] Preferably, noise-reducing sealing covers are hinged to both sides of the pile body, and multiple sound-absorbing strips are installed on the inner side of the noise-reducing sealing covers along the airflow direction.

[0015] Preferably, a sound-absorbing baffle is installed inside the pile body, the exhaust channel is located between the sound-absorbing baffle and the noise-reducing sealing cover, and multiple sound-absorbing cottons are embedded in the sound-absorbing baffle.

[0016] Preferably, a silencing box is installed at the bottom of both sides of the pile body, the top surface of the silencing box corresponds to the opening of the silent adjustment cover, and the bottom surface of the silencing box is in contact with the ground.

[0017] In the aforementioned technical solution, by changing the traditional horizontal louvered form of the air inlet and outlet to a downward-facing position on the side of the charging pile and adding a silent adjustment cover extending downwards, this design guides the air intake and exhaust direction to the lower area of ​​the charging pile. This effectively absorbs and blocks sound waves, causing noise to change direction in its early propagation stages. The design utilizes the limitation of the propagation space and the sound absorption effect of the ground surface to achieve physical attenuation of sound energy. When the cable is fully resting on the elastic support mechanism of the cable rack, the charging pile is in an uncharged state. The weight of the cable presses down on the elastic support mechanism, triggering the transmission adjustment mechanism to drive the silent adjustment cover upwards. This exposes the air inlet / exhaust vents, forming a low-resistance pre-heating channel with reduced obstruction, which can meet the low power consumption requirements of the charging pile in standby mode. For heat dissipation, the exposed vents do not cause significant noise diffusion. However, when the user pulls out the cable for charging, the elastic support mechanism automatically returns to its original position due to the loss of cable weight and its own restoring force. This action drives the transmission adjustment mechanism in the reverse direction, causing the noise reduction cover to move completely downward. At this point, the noise reduction cover completely covers the vents. When the fan starts running at high speed for forced cooling, the high-pressure hot airflow is forcibly constrained and discharged downward through the opening at the bottom of the noise reduction cover. The high-speed airflow ejected downward mainly impacts the ground or pile base area, where the sound wave energy is quickly absorbed and scattered by the hard ground and surrounding structures, effectively preventing the horizontal diffusion of noise to ear height. The sealed cover also has a significant physical barrier effect on high-frequency airflow noise, allowing for precise switching of noise reduction modes as needed.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a silent charging pile according to the present invention;

[0022] Figure 2 This is a rear sectional view of a silent charging station according to the present invention;

[0023] Figure 3 This is a schematic diagram showing the connection between the transmission adjustment mechanism, the elastic support mechanism, and the silent adjustment cover in a silent charging pile according to the present invention.

[0024] Figure 4 This is a schematic diagram of the elastic support mechanism in a silent charging pile according to the present invention;

[0025] Figure 5 This is a schematic diagram of the transmission adjustment mechanism and the silent adjustment cover in a silent charging pile according to the present invention;

[0026] Figure 6 In this invention Figure 5 Enlarged view of the structure at point A;

[0027] Figure 7 This is a schematic diagram showing the positional relationship between the impeller and the arc-shaped sound-absorbing pad in a silent charging pile according to the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the silencer box in a silent charging pile according to the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Pile body; 2. Cable rack; 3. Air inlet; 301. Air inlet channel; 4. Air outlet; 401. Air outlet channel; 403. Impeller; 404. Sound-absorbing layer; 405. Arc-shaped sound-absorbing pad; 406. Wind baffle; 5. Elastic support mechanism; 501. Insert rod; 502. Support plate; 503. Top spring; 6. Silent adjustment cover; 601. Opening; 602. Driven rack; 7. Transmission adjustment mechanism; 701. Connecting frame; 702. Transmission gear; 703. Drive rack; 704. Wedge-shaped top block; 8. Sound insulation cotton; 9. Noise reduction sealing cover; 901. Sound-absorbing strip; 10. Sound-absorbing partition; 1002. Sound-absorbing cotton; 11. Sound-absorbing box; 1101. Sound wave breaking layer; 1102. Filter layer; 1103. Microporous drainage layer. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please see Figure 1-8This invention provides a silent charging pile, including a pile body 1 and a pair of cable racks 2, which are respectively installed on both sides of the pile body 1. Air inlets 3 and exhaust outlets 4 are respectively provided on both sides of the pile body 1, located below the cable racks 2. An elastic support mechanism 5 and a silent adjustment cover 6 are inserted into the cable racks 2. Each silent adjustment cover 6 is slidably installed outside the air inlets 3 and exhaust outlets 4. An opening 601 is provided at the bottom of the silent adjustment cover 6. A transmission adjustment mechanism 7 is installed inside the pile body 1 and is connected to the elastic support mechanism 5 and the silent adjustment cover 6. When the cable is connected to the cable rack 2, the elastic support mechanism 5 is pressed down to control the silent adjustment cover 6 to move upward for heat dissipation via the transmission adjustment mechanism 7.

[0033] Specifically, the charging pile body 1 is the main structure of the charging pile, which contains multiple cooling fans to accelerate airflow, electrical modules, and transmission components. The cable rack 2 is used to facilitate the placement of charging cables by the car owner after charging is completed. The charging cables placed on the cable rack 2 are then placed on the elastic support mechanism 5. The operating mode of this charging pile automatically switches between noise reduction and heat dissipation strategies according to the cable placement status. By changing the traditional horizontal louver form of the air inlet 3 and exhaust vent 4 from the side to a downward position on the side of the charging pile body 1 and adding a silent adjustment cover 6 extending downward, this design guides the direction of air intake and exhaust to the lower area of ​​the charging pile. It can effectively absorb and block sound waves, causing noise to change direction in the early stages of propagation. It utilizes the limitation of the propagation space and the sound absorption effect of the ground surface to achieve physical attenuation of sound energy. When the cable is completely resting on the elastic support mechanism 5 of the cable rack 2, the charging pile is in an uncharged state. The weight of the cable presses down on the elastic support mechanism 5, triggering the transmission adjustment mechanism 7 to drive the silent adjustment cover 6 upwards. This exposes the open area of ​​the air inlet 3 and the exhaust outlet 4, forming a low-resistance pre-heating channel, which can meet the low-power heat dissipation requirements of the fan in standby mode. Simultaneously, because most of the air outlets are exposed, it facilitates rapid airflow and startup acceleration during the initial fan start-up. The system offers rapid response. Although the vents are open, the fans operate at low speed, stop, or run briefly because the equipment is in standby or low-power mode. This meets the basic heat dissipation needs in standby mode, such as transformer temperature control and display system heat dissipation. The overall noise level is low, and the exposed vents do not cause significant noise diffusion. When the user pulls out the cable wrapped around the cable tray 2 for charging, the elastic support mechanism 5 loses the weight of the cable and automatically springs back to its original position. This action drives the transmission adjustment mechanism 7 in the reverse direction, causing the silent adjustment cover 6 to move completely downward. At this point, the silent adjustment cover 6 completely covers the vents, leaving only the bottom opening 6. 01 serves as the sole airflow discharge or intake channel. When the fan starts operating at high speed for forced cooling, the high-pressure hot airflow is forcibly constrained and discharged downwards through the opening 601 at the bottom of the silent adjustment cover 6. The high-speed airflow ejected downwards mainly impacts the ground or the base area of ​​the pile 1. The sound wave energy is quickly absorbed and scattered by the hard ground and surrounding structures, effectively preventing the horizontal diffusion of noise to the height of the human ear. At the same time, the sealed cover has a significant physical barrier effect on high-frequency airflow noise. The noise reduction mode can be precisely switched as needed to ensure rapid heat dissipation of the charging pile when the fan is in standby mode, and significantly reduce the propagation energy and propagation distance of the fan's high-frequency operating noise.

[0034] Compared with the prior art, this embodiment of the invention changes the traditional horizontal louver form of the air inlet 3 and exhaust outlet 4 to a downward-facing position on the side of the charging pile 1, and adds a silent adjustment cover 6 extending downwards. This design guides the air intake and exhaust direction to the lower area of ​​the charging pile, which can effectively absorb and block sound waves, causing noise to change direction in the early stage of propagation. It utilizes the limitation of the propagation space and the sound absorption effect of the ground to achieve physical attenuation of sound energy. When the cable is completely resting on the elastic support mechanism 5 of the cable rack 2, the charging pile is in an uncharged state. The weight of the cable presses down on the elastic support mechanism 5, triggering the transmission adjustment mechanism 7 to drive the silent adjustment cover 6 to move upwards. This exposes the air outlet, forming a low-resistance pre-heating channel with reduced obstruction, which can meet the low power requirements of the charging pile in the standby state. When the user pulls out the cable for charging, the elastic support mechanism 5 automatically returns to its original position due to the loss of cable weight and its own restoring force. This action drives the transmission adjustment mechanism 7 in the reverse direction, causing the silent adjustment cover 6 to move completely downward. At this time, the silent adjustment cover 6 completely covers the air vent. When the fan starts to run at high speed for forced cooling, the high-pressure hot airflow is forcibly constrained and discharged downward through the opening 601 at the bottom of the silent adjustment cover 6. The high-speed airflow ejected downward mainly impacts the ground or the base area of ​​the pile 1. The sound wave energy is quickly absorbed and scattered by the hard ground and surrounding structures, effectively preventing the horizontal diffusion of noise to the height of the human ear. The sealed cover also has a significant physical barrier effect on high-frequency airflow noise, allowing for precise switching of noise reduction modes as needed.

[0035] In a further practical example of the present invention, the pile body 1 is provided with an air inlet channel 301 connected to the air inlet 3 and an exhaust channel 401 connected to the exhaust outlet 4. Both the exhaust channel 401 and the air inlet channel 301 are equipped with sound insulation cotton 8. Specifically, in the standby mode of the charging pile, the sound insulation cotton 8 absorbs low-speed airflow noise. In the charging mode, the sound insulation cotton 8 further suppresses the noise of high-speed airflow in the air duct. During charging, the cooling fan runs at full speed, and the hot airflow enters the exhaust channel 401. In the first noise reduction stage, the airflow enters the air inlet channel 301 and the exhaust channel 401 covered by the sound insulation cotton 8, and the mid-to-high frequency noise is greatly absorbed. In the second noise reduction stage, when the airflow reaches the exhaust outlet 4, the silent adjustment cover 6 has completely moved down to cover the air outlet, forming a sealed chamber. The airflow is forced to turn and spray out from the bottom opening 601 in the form of a jet. Finally, the high-speed airflow vertically impacts the ground, and the sound wave energy is attenuated by the scattering of the ground surface, and the horizontal propagation path is cut off.

[0036] In a further embodiment of the present invention, the elastic support mechanism 5 includes a rod 501 inserted through the top of the cable rack 2. A support plate 502 is fixedly connected to the top of the rod 501. The surface of the support plate 502 is covered with an anti-slip silicone layer. A top spring 503 is sleeved on the rod 501, and the two ends of the top spring 503 abut against the support plate 502 and the cable rack 2 respectively. Specifically, when the charging is completed and the cable is wound around the cable rack 2, the cable will rest on the support plate 502. The top spring 503 on the rod 501 can buffer the cable, prevent the cable from colliding directly with the cable rack 2, reduce the wear of the cable and the cable rack 2, and prevent the cable from being accidentally bent during the process of winding the cable around the cable rack 2. At the same time, the top spring 503 can reset and lift the support plate 502 when the cable is removed from the cable rack 2, so that the support plate 502 on the cable rack 2 can be reset again, thereby automatically adjusting the position of the silent adjustment cover 6, so as to quickly adjust the noise reduction strategy of the charging pile in charging and standby states.

[0037] In a further embodiment of the present invention, the transmission adjustment mechanism 7 includes a connecting frame 701 slidably mounted on the inner wall of the pile body 1. One side of the connecting frame 701 is connected to the insertion rod 501, and the other side is connected to the silent adjustment cover 6. Specifically, when the cable is wound on the cable rack 2, it will overlap the support plate 502. The cable applies vertical downward pressure to compress the top spring 503, causing the support plate 502 to drive the insertion rod 501 to move downward. The bottom end of the insertion rod 501 then pulls the transmission adjustment mechanism 7, allowing the transmission mechanism to convert its force into the upward movement of the silent adjustment cover 6, exposing the air inlet 3 and the air outlet 4 for standby heat dissipation. When the cable is removed from the cable rack 2 for charging... The tray 502 is no longer under the pressure of the cable, and it is reset and lifted under the action of the spring, causing the plug 501 to push the transmission adjustment mechanism 7 to move in the opposite direction, so that the silent adjustment cover 6 is lowered. At this time, the silent adjustment cover 6 is completely lowered to cover the air inlet 3 and the air outlet 4. The fan in the charging pile also runs at high speed as the charging state is switched. The high-speed airflow is discharged through the exhaust channel 401 and the silent adjustment cover 6 in sequence. The sound insulation cotton 8 in the exhaust channel 401 absorbs most of the high-frequency noise, and the sealed silent adjustment cover 6 blocks the horizontal propagation of the remaining noise. The noise is guided downward and sprayed to impact the ground surface to scatter and reduce some of the sound energy, so that the noise of the charging pile in the charging state is greatly reduced.

[0038] In a further practical example of the present invention, transmission gears 702 are rotatably connected to both sides of the inner walls of the air inlet 3 and the air outlet 4. A drive rack 703 meshing with the transmission gears 702 is vertically provided on the connecting frame 701. A driven rack 602 meshing with the transmission gears 702 is fixedly connected to both sides of the inner wall of the silent adjustment cover 6. Specifically, the gears are fixed in the pile body 1 through a rotating shaft, converting the vertical movement of the connecting frame 701 into the reverse vertical sliding of the silent adjustment cover 6. The cable presses down on the support plate 502, and the insertion rod 501 moves down to compress the top spring 503. The mode switching is completed solely by the weight of the cable and the energy stored in the spring, reducing energy consumption. The displacement of the elastic support mechanism 5, the transmission adjustment mechanism 7, and the silent adjustment cover 6 is strictly consistent to avoid loss of control of the air outlet adjustment. The top spring 503 always provides a restoring force, which can quickly adjust the position of the silent adjustment cover 6 when the charging pile switches from the charging state to the standby state, so as to ensure that after the fan's operating energy consumption is reduced, the airflow can quickly pass through the charging pile, ensuring the heat dissipation efficiency of the charging pile when it is in standby mode.

[0039] In a further embodiment of the present invention, an impeller 403 is rotatably connected to the exhaust duct 401 near the exhaust port 4. Both sides of the blades of the impeller 403 are provided with sound-absorbing layers 404. An arc-shaped sound-absorbing pad 405 is fixedly connected to the exhaust duct 401 below the impeller 403. Specifically, the impeller 403 is installed at the end of the exhaust duct 401 and near the exhaust port 4. Both sides of the blades are covered with sound-absorbing layers. The arc-shaped sound-absorbing pad 405 is fixed directly below the impeller 403, and its radius of curvature matches the sweeping trajectory of the impeller 403. A gap is reserved between the impeller 403 and the arc-shaped inner wall of the arc-shaped sound-absorbing pad 405. The airflow discharged through the exhaust duct 401 drives the impeller 403 to rotate, breaking the continuous vortex into micro-scale airflow. The rotation of the impeller 403 realizes micro-control of airflow, breaking through the frequency limitation of static noise reduction components. The gap between the impeller 403 and the arc-shaped sound-absorbing pad 405 is precisely matched and fitted, which avoids friction and improves the sound absorption effect.

[0040] In a further embodiment of the present invention, a baffle plate 406 is hinged to the inner wall of the exhaust duct 401 above the impeller 403, and a slider is symmetrically fixed to the other side. A groove matching the slider is vertically opened on the inner wall of the pile body 1. A compression spring connected to the groove is fixedly connected to the top of the slider. A pair of wedge-shaped top blocks 704 that abut against the baffle plate 406 are fixedly connected to the inner side of the connecting frame 701. When the cable is connected to the elastic support mechanism 5, one side of the baffle plate 406 is in contact with the inner wall of the exhaust duct 401. When the cable leaves the elastic support mechanism 5, the connecting frame 701, with the wedge-shaped top blocks 704, pushes the baffle plate 406 from bottom to top and tilts it. Specifically, in the standby state of the charging pile, the elastic support mechanism 5 is pressed, causing the connecting frame 701 in the transmission adjustment mechanism 7 to move down. At this time, the wedge-shaped top blocks 704 are located below the baffle plate 406. The side of 06 facing away from the airflow discharge direction is in contact with the inner wall of the exhaust channel 401, eliminating the additional wind resistance structure in the exhaust channel 401. This ensures the pre-reserved exhaust area between the impeller 403 and the baffle plate 406, allowing some airflow to be quickly discharged without passing through the impeller 403 in standby mode, which is more conducive to natural heat dissipation and reduces standby power consumption. When the cable on the cable rack 2 is removed for charging, the connecting frame 701, with the wedge-shaped top block 704, pushes the baffle plate 406 from bottom to top, causing the baffle plate 406 to gradually tilt in the exhaust channel 401. This allows the discharged airflow to concentrate and impact the side of the impeller 403 near the arc-shaped sound-absorbing pad 405, allowing the impeller 403 to carry the noise-laden airflow through the arc-shaped inner wall of the arc-shaped sound-absorbing pad 405 before being discharged. The baffle guides the impeller 403 to accelerate, greatly improving the vortex cutting efficiency of the impeller 403 and resulting in significant noise reduction.

[0041] In a further embodiment of the present invention, noise-reducing sealing cover plates 9 are hinged to both sides of the pile body 1. Multiple sound-absorbing strips 901 are installed on the inner side of the noise-reducing sealing cover plates 9 along the airflow direction. Specifically, when the noise-reducing sealing cover plates 9 on both sides are closed, they can achieve auxiliary noise reduction through the multiple sound-absorbing strips 901. At the same time, when the noise-reducing sealing cover plates 9 are opened, it is convenient to inspect and maintain the internal structure of the charging pile. The position of the noise-reducing sealing cover plates 9 is the position of the louvered heat dissipation window in the prior art. Now, it is improved so that the noise-reducing sealing cover plates 9 can achieve a fully sealed state for the upper part of the pile body 1, thereby reducing the height of noise transmission. The noise-reducing sealing cover plates 9 are easy to open and also convenient to install and replace the sound-absorbing strips 901.

[0042] In a further practical example of the present invention, a sound-absorbing baffle 10 is installed inside the pile body 1, and an exhaust channel 401 is located between the sound-absorbing baffle 10 and the noise-reducing sealing cover 9. The sound-absorbing baffle 10 is embedded with multiple sound-absorbing cotton 1002. Specifically, the sound-absorbing baffle 10 is vertically fixed inside the pile body 1 and forms a sound-absorbing air duct parallel to the noise-reducing sealing cover 9. Part of the airflow enters the exhaust channel 401 after being blocked by the sound-absorbing baffle 10, and another part passes through the sound-absorbing cotton 1002 and enters the exhaust channel 401. The two parts of the airflow are simultaneously silenced, achieving efficient synergy in noise reduction. The exhaust channel 401 formed by the sound-absorbing baffle 10 and the noise-reducing sealing cover 9 is a sound-absorbing air duct. Multi-stage noise reduction is achieved through the sound-absorbing cotton 8 covering itself, the sound-absorbing strip 901 in the noise-reducing sealing cover 9, and the sound-absorbing cotton 1002 in the sound-absorbing baffle 10, which greatly reduces the noise carried by the airflow during exhaust. Adaptive noise reduction is achieved through material gradient design and structural optimization.

[0043] In a further practical example of the present invention, a silencing box 11 is installed on both sides of the bottom of the pile body 1. The top surface of the silencing box 11 corresponds to the opening 601 of the silent adjustment cover 6, and the bottom surface of the silencing box 11 is in contact with the ground. The silencing box 11 is provided with a sound wave breaking layer 1101, a filter layer 1102 and a microporous drainage layer 1103 from top to bottom. Specifically, the sound wave breaking layer 1101 is composed of an array of sound-absorbing cones. The gradient density material causes the sound wave to undergo a gradual impedance attenuation in the cone. Through the sound-absorbing cone breaking, the filter guiding and extending, and the microporous diffusion, part of the sound energy is converted into ground vibration dissipation. The combination of drainage micropores and filter can avoid additional noise caused by blockage when the sound propagates.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A silent charging pile, comprising a pile body (1), characterized in that, Also includes: A pair of cable racks (2) are installed on both sides of the pile body (1). The pile body (1) has an air inlet (3) and an air outlet (4) on both sides. The air inlet (3) and the air outlet (4) are located below the cable racks (2). An elastic support mechanism (5) is inserted into the cable racks (2). The noise control cover (6) is slidably installed outside the air inlet (3) and the air outlet (4), and the bottom of the noise control cover (6) is provided with an opening (601). The transmission adjustment mechanism (7) is installed inside the pile body (1) and is connected to the elastic support mechanism (5) and the silent adjustment cover (6) respectively. When the cable is attached to the cable rack (2), the elastic support mechanism (5) is pressed down to control the silent adjustment cover (6) to move upward to dissipate heat through the transmission adjustment mechanism (7). The pile body (1) has a soundproof box (11) installed on both sides of the bottom. The top surface of the soundproof box (11) corresponds to the opening (601) of the soundproof adjustment cover (6), and the bottom surface of the soundproof box (11) is in contact with the ground. When the user pulls out the cable wrapped on the cable rack (2) for charging, the elastic support mechanism (5) is pressed down and disappears due to the loss of cable weight. Under its own restoring force, it automatically springs back to its original position. This action drives the transmission adjustment mechanism (7) in the reverse direction, causing the silent adjustment cover (6) to move completely downward. At this time, the silent adjustment cover (6) covers the air vent, leaving only the bottom opening (601) as the only airflow discharge or entry channel. When the fan starts to run at high speed for forced heat dissipation, the high-pressure hot airflow is forcibly constrained and discharged downward through the opening (601) at the bottom of the silent adjustment cover (6).

2. The silent charging pile according to claim 1, characterized in that, The pile body is provided with an air inlet channel (301) connected to the air inlet (3) and an exhaust channel (401) connected to the exhaust outlet (4). Sound insulation cotton (8) is installed in both the exhaust channel (401) and the air inlet channel (301).

3. A silent charging station according to claim 1, characterized in that, The elastic support mechanism (5) includes a rod (501) inserted through the top of the cable rack (2), a support plate (502) is fixedly connected to the top of the rod (501), and a top spring (503) is provided on the outer sleeve of the rod (501), with the two ends of the top spring (503) abutting against the support plate (502) and the cable rack (2) respectively.

4. A silent charging station according to claim 2, characterized in that, The transmission adjustment mechanism (7) includes a connecting frame (701) that is slidably installed on the inner wall of the pile body (1). One side of the connecting frame (701) is connected to the insert rod (501), and the other side is connected to the silent adjustment cover (6) in a transmission connection.

5. A silent charging station according to claim 4, characterized in that, The air inlet (3) and the air outlet (4) are rotatably connected to both sides of the inner wall of the air inlet (3) and the air outlet (4). The connecting frame (701) is vertically provided with a drive rack (703) that meshes with the drive rack (702). The inner wall of the silent adjustment cover (6) is fixedly connected to both sides of the driven rack (602) that meshes with the drive rack (702).

6. A silent charging station according to claim 4, characterized in that, An impeller (403) is rotatably connected to the exhaust duct (4) near the exhaust port (4). Both sides of the blades of the impeller (403) are provided with sound-absorbing layers (404). An arc-shaped sound-absorbing pad (405) is fixedly connected to the exhaust duct (401) below the impeller (403).

7. A silent charging station according to claim 6, characterized in that, A baffle plate (406) is hinged to the inner wall of the exhaust duct (401) above the impeller (403). A pair of wedge-shaped top blocks (704) that abut against the baffle plate (406) are fixedly connected to the inner side of the connecting frame (701). When the cable is attached to the elastic support mechanism (5), one side of the baffle plate (406) is in contact with the inner wall of the exhaust duct (401). When the cable leaves the elastic support mechanism (5), the connecting frame (701) pushes the baffle plate (406) from bottom to top with the wedge-shaped top blocks (704) and tilts it.

8. A silent charging station according to claim 1, characterized in that, The pile body (1) is hinged with noise reduction sealing cover plate (9) on both sides, and multiple sound-absorbing strips (901) are installed on the inner side of the noise reduction sealing cover plate (9) along the airflow direction.

9. A silent charging station according to claim 2, characterized in that, The pile body (1) is equipped with a sound-absorbing baffle (10), the exhaust channel (401) is located between the sound-absorbing baffle (10) and the noise-reducing sealing cover (9), and the sound-absorbing baffle (10) is embedded with multiple sound-absorbing cotton (1002).

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