Mute device for charging device, mute charging device and installation method

Abstract

The invention relates to the technical field of charging piles, and discloses a mute device for a charging device, a mute charging device and an installation method.The mute charging device comprises the charging pile, a first access door is arranged on the left side of the charging pile, a second access door is arranged on the right side of the charging pile, and an air inlet silencing structure is arranged on the left side of the first access door; an air outlet noise reduction structure is arranged on the right side of the second access door. Noise is reduced by arranging the air inlet noise reduction structure and the air outlet noise reduction structure, and under the condition that the original structure and the heat dissipation effect of the charging pile are not changed, silent charging is achieved through the reasonably-arranged miniaturized and light silent equipment through the structure of the access door of the charging pile, and meanwhile the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a mute device, a charging device and an installation method. Background Art

[0002] The construction and operation of electric vehicle charging piles is an important part of the national infrastructure construction and development strategy. The process of electric vehicles replenishing electricity at charging stations generally requires continuous operation for at least 30 minutes. In order to achieve a shorter charging time, charging piles are mostly operated in a high-power output mode. The most important power module in the charging pile is the AD-CD power module. During operation, the power module generates a lot of heat, which requires effective ventilation and heat dissipation. If the heat accumulates in the cabinet and cannot be effectively dissipated, it will seriously threaten the operation of the power module. If the temperature is too high, the power module will burn due to the high temperature, or catch fire or even explode.

[0003] Charging pile manufacturers all use forced air cooling to effectively dissipate the ventilation heat of the charging pile. Dry cooling fans are installed in the cabinet for exhaust, and then the ventilation shutters are opened on the charging pile cabinet, such as left in and right out, to form a forced circulation wind, that is, cold air from the outside of the cabinet enters, hot air comes out, and the inside of the cabinet is exhausted. The noise of the charging pile mainly comes from the core component of the charging pile - the charging module. Since most charging modules use air cooling heat dissipation mode, heat is dissipated by starting the fan. The higher the temperature, the faster the fan speed, and the greater the noise.

[0004] To solve the noise problem of charging piles, charging pile manufacturers generally adopt low-noise heat dissipation technology, such as liquid cooling technology, which makes the noise during charging almost zero. If the charging pile has been put into use, it is not realistic to replace the equipment, so a silencing device will be installed. First of all, after installing the silencing device, the noise is reduced, but it also affects the heat dissipation of the charging pile.

[0005] Secondly, to ensure that users will not be harmed in extreme cases, charging piles must have multiple safety measures such as lightning protection, moisture protection, explosion protection, and fire protection. For charging piles that have been put into use, on the one hand, it is necessary to consider not affecting the fire protection and explosion protection of the original charging piles, and when installing silencers, the changes to the original charging pile structure should be reduced. On the other hand, considering the limited space in the use environment of the charging piles, how to install silencers without reducing the user experience and affecting the maintenance and inspection of maintenance personnel are urgent issues to be solved. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a silent charging device. Without changing the original structure and heat dissipation effect of the charging pile, the structure of the inspection door of the charging pile is utilized to achieve silent charging through reasonably arranged miniaturized and lightweight silent equipment while improving the user experience.

[0007] A second object of the present invention is to provide a silent device for a charging device.

[0008] Another object of the present invention is to provide a method for installing a silent charging device.

[0009] The technical solution of the present invention is: a silent charging device, wherein an inspection door 1 is provided at the air inlet of the charging pile, and an inspection door 2 is provided at the air outlet of the charging pile, and shutters are provided on the inspection door 1 and the inspection door 2, and the characteristics are: the inspection door 1 has a detachable hook on the door side connected to the air inlet silencer structure, and the inspection door 2 has a detachable hook on the door side connected to the air outlet silencer structure, and the air inlet silencer structure and the air outlet silencer structure are symmetrically arranged; The air inlet silencer structure comprises a prismatic air inlet cover, the side of the air inlet cover has a cover opening for covering the air inlet, the bottom of the air inlet cover has at least one group of air inlet holes, each group of air inlet holes comprises a plurality of air inlet holes arranged in an array, and a fan for air intake is arranged at each group of air inlet holes; the air inlet cover consists of an upper inclined plate, a bottom plate and a plurality of side plates, and the side plates located at the left and right parts are right-angled trapezoidal plates; The inner wall of the air inlet hood is covered with a sound-absorbing layer to form an air inlet sound-absorbing chamber. The top of the air inlet sound-absorbing chamber is inclined with the front lower and the rear higher. The middle of the air inlet sound-absorbing chamber is an inclined air inlet guide section. The front end of the inclined air inlet guide section is low and the rear end is high. The inclined air inlet guide section is composed of n inclined small channels. The air inlet sound-absorbing chamber at the front end of the inclined air inlet guide section is a short straight air guide section. The projections of the short straight air guide section and the inclined air inlet guide section completely cover the position of the fan 1. The air inlet sound-absorbing chamber at the rear end of the inclined air inlet guide section is a long straight air guide section. The outlet of the long straight air guide section completely covers the position of the shutter on the inspection door 1. n inclined small channels are separated by n-1 grille air guide plates 1 which are arranged in sequence from top to bottom in the middle of the air inlet silencer cavity, and the surface of the grille air guide plate 1 is covered with a silencer layer; the inclination angle of the grille air guide plate 1 and the inclination angle of the upper inclined plate are both equal to the inclination angle of the inspection door louver blades; the number of grille air guide plates 1 is less than the number of louver blades; the angle between the grille air guide plate 1 and the bottom of the air inlet cover is a=45±10°. The air outlet silencer structure includes an air outlet cover body with the same structure as the air inlet cover body, the side of the air outlet cover body has a cover opening for covering the air outlet, and the bottom of the air outlet cover body has at least one group of air outlet holes, each group of air outlet holes includes multiple air outlet holes arranged in an array, and a fan 2 for sucking air is provided at one group of air outlet holes; The inner wall of the air outlet hood is covered with a sound-absorbing layer to form an air outlet sound-absorbing chamber. The top of the air outlet sound-absorbing chamber is inclined with the front lower and the rear higher. The air outlet sound-absorbing chamber is divided into a front sound-absorbing chamber and a rear sound-absorbing chamber by a vertical air outlet guide plate. The opening of the front sound-absorbing chamber completely covers the position of the shutter on the second inspection door; the rear sound-absorbing chamber is divided into more than two sound-absorbing spaces by more than one horizontal grille air guide plate, and the surface of the air outlet guide plate and the horizontal grille air guide plate is covered with a sound-absorbing layer; the distance between the air outlet guide plate and the horizontal grille air guide plate forms an air outlet channel; ventilation holes are arranged on the horizontal grille air guide plate.

[0010] The vertical air outlet guide plate is installed near the hood opening, and the middle part of the air outlet guide plate is alternately provided with air guide hole unit 1 and air guide hole unit 2 from top to bottom. The air guide hole unit 1 includes a long strip hole, and the air guide hole unit 2 is composed of two short strip holes with a spacing. The sum of the number of air guide hole units 1 and air guide hole units 2 is less than the number of louver blades; the sound-absorbing layer on the surface of the air outlet guide plate has clearance holes for making way for the air guide hole unit 1 and the air guide hole unit 2, and the sound-absorbing layer on the surface of the horizontal grille air guide plate has clearance holes for making way for the ventilation holes.

[0011] The fan 1 and the fan 2 are two fans arranged in parallel, there are two horizontal grille air guide plates, the horizontal grille air guide plate close to the fan 2 is provided with a ventilation hole 3 corresponding to the fan 2, and the horizontal grille air guide plate away from the fan 2 is provided with a ventilation hole 2.

[0012] The upper parts of the cover openings of the air inlet cover body and the air outlet cover body are provided with hooks, and the air inlet cover body and the air outlet cover body are hung on the door edges of the first / second inspection door through the hooks.

[0013] The upper part of the air inlet cover is provided with a horizontal bent edge, and the middle part of the horizontal bent edge is provided with two or more vertical baffles to form a hook; the thickness of the horizontal bent edge is ≤ the gap between the inspection door and the air inlet of the charging pile.

[0014] The lower part of the cover opening is provided with a vertical folding edge bent outwards, and there are mounting holes for mounting screws on the vertical folding edge. The left and right sides of the cover opening are provided with vertical folding edges bent inwards.

[0015] A sealing ring is arranged at the cover opening.

[0016] The air outlet cover has a second connecting block on its inner wall, and a mounting hole is formed on the second connecting block. The air outlet guide plate has oblong holes around it that match the mounting hole. The second connecting block and the air outlet guide plate are connected by bolts installed at the mounting hole and the oblong hole. The inner wall of the air inlet hood is provided with a connecting block corresponding to each grille air guide plate, and the connecting block is provided with an assembly hole. The side surface of the grille air guide plate is provided with an oblong hole matching the assembly hole. The connecting block and the grille air guide plate are connected by bolts installed at the assembly hole and the oblong hole.

[0017] A method for installing a silent charging device as described above, wherein a symmetrically arranged silencing structure is detachably hooked and connected on the door edge of the inspection door at the air inlet and outlet of the charging pile, and the silencing structure includes an air inlet silencing structure and an air outlet silencing structure; the method for installing the air inlet silencing structure includes: The inner wall of the air inlet hood is covered with a sound-absorbing layer to form an air inlet sound-absorbing chamber. The top of the air inlet sound-absorbing chamber is inclined with a low front and a high rear. A grille air guide plate 1 is installed in the air inlet sound-absorbing chamber. After aligning the oblong hole of the grille air guide plate 1 with the assembly hole on the connecting block 1, the two are pre-assembled together by bolts. The position of the grille air guide plate 1 is adjusted along the oblong hole until the area of ​​the projection of the grille air guide plate 1 on the horizontal plane and the overlapped part of the fan 1 is greater than half of the fan area. The bolts are tightened to fix the position of the grille air guide plate 1. The installation method of the air outlet silencer structure includes: The inner wall of the air outlet hood is covered with a sound-absorbing layer to form an air outlet sound-absorbing chamber, the top of the air outlet sound-absorbing chamber is inclined with a low front and a high rear, and an air outlet guide plate and a horizontal grille air guide plate are installed in the air outlet sound-absorbing chamber; the air outlet sound-absorbing chamber is divided into a front sound-absorbing chamber and a rear sound-absorbing chamber by a vertical air outlet guide plate, and the cavity opening of the front sound-absorbing chamber completely covers the position of the shutter on the inspection door 2; the rear sound-absorbing chamber is divided into more than two sound-absorbing spaces by more than one horizontal grille air guide plate, and the surfaces of the air outlet guide plate and the horizontal grille air guide plate are covered with a sound-absorbing layer; the distance between the air outlet guide plate and the horizontal grille air guide plate forms an air outlet channel; after the oblong hole of the air outlet guide plate is aligned with the assembly hole of the connecting block 2, the two are pre-assembled together by bolts, and the position of the air outlet guide plate is adjusted along the oblong hole until the projection of the upper / lower long strip hole or combination hole of the air outlet guide plate on the inspection door is outside the shutter, and the fan 2 is placed behind the air outlet guide plate, and the bolts are tightened to fix the position of the air outlet guide plate; The power cables of fan 1 and fan 2 are connected to the power module in the charging pile.

[0018] The inspection door is provided with a threading hole for passing the power line.

[0019] The top of the prismatic air inlet cover of the air inlet silencer structure of the present invention is an upper inclined plate, and an inclined air inlet guide section composed of n inclined small channels is arranged in the middle of the air inlet silencer cavity, so that the vertical wind direction is changed to the inclined direction of the upper inclined plate. After the change, the wind direction is close to the inclined direction of the louver blades of the inspection door, thereby reducing the wind resistance coefficient. The air entering through the fan 1 enters the louver of the inspection door through the short straight air guide section, the inclined air inlet guide section, and the long straight air guide section. The projections of the short straight air guide section and the inclined air inlet guide section completely cover the position of the fan 1. The air inlet silencer cavity at the rear end of the inclined air inlet guide section is a long straight air guide section, and the outlet of the long straight air guide section completely covers the position of the louver on the inspection door 1. The multiple inclined small channels of the inclined air inlet guide section increase the wind speed, so that the cold air can quickly pass through the inclined small channels to reach the long straight air guide section. The volume of the long straight air guide section is larger than that of the short straight air guide section, and can accommodate sufficient air intake to reach the long straight air guide section, so that the present invention does not affect the air intake into the louver of the inspection door 1 after the silencer structure is installed. The n inclined small channels are divided and arranged by n-1 grille air guide plates 1 that are arranged in sequence from top to bottom in the middle of the air inlet silencer cavity. The inclination angle of the grille air guide plate 1 and the inclination angle of the upper inclined plate are equal to the inclination angle of the louver blades of the inspection door, thereby reducing the wind resistance coefficient.

[0020] The structure of the air outlet hood of the air outlet silencer structure of the present invention is the same as that of the air inlet hood, and the two are symmetrically arranged. The top of the air outlet silencer cavity is inclined with a low front and a high rear, and the air outlet silencer cavity is divided into a front silencer cavity and a rear silencer cavity by a vertical air outlet guide plate. When the air in the air inlet hood is heat-exchanged with the charging pile to form hot air and reaches the front silencer cavity, the hot air outlet wind speed is further accelerated after being guided by the long strip holes and short strip holes on the air outlet guide plate. After the hot air enters more than two silencer spaces for further silence, it forms an air outlet channel through the spacing between the air outlet guide plate and the horizontal grille guide plate, and the ventilation holes on the horizontal grille guide plate can be quickly sucked out by the second fan. The volume of the rear silencer cavity is larger than that of the front silencer cavity, so that there is sufficient space for the hot air.

[0021] The air inlet and outlet silencer structures of the present invention do not reduce the heat dissipation effect of the charging pile. The upper inclined plate of the air inlet / outlet cover of the present invention does not reduce the user's experience of using the charging column. If there is severe weather such as heavy rain or heavy snow during use, the heavy rain or heavy snow will slide down along the inclined direction of the upper inclined plate of the air inlet / outlet cover, avoiding the accumulation of heavy rain or heavy snow in the air inlet / outlet cover, which will increase the problems of water leakage and seepage in the air inlet / outlet cover.

[0022] The present invention provides a silent charging device. On the one hand, by adjusting the angle position of the grille air guide plate 1 and its position relative to the fan 1, the air intake reaches the minimum wind resistance coefficient, reduces the air intake resistance, and increases the air intake rate; on the other hand, the position of the air outlet guide plate relative to the inspection door shutter is adjusted to adjust the size of the front silencer cavity and the rear silencer cavity of the air outlet silencer cavity, so that the fan 2 has the best air suction effect, thereby improving the silencing effect of the present invention. The present invention solves the problems of consuming a lot of time during maintenance, poor heat dissipation effect, and easy entry of dust into the interior of the charging pile. In order not to change the structure of the original charging column, the hook design has the advantages of convenient installation, good noise reduction and heat dissipation effect, and dust prevention. The conveniently installed charging pile silencing device, by setting the inlet and outlet silencing structure, installs the hook on the top of the inspection door. When the fan is running, the outside air is sucked into the air intake shell, and the noise is reduced through the silencing layer of the inlet / outlet air cover body, ensuring noise reduction and heat dissipation while reducing the time of the inlet and outlet air cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 This is a front cross-sectional view of the air outlet cover structure of the present invention; Figure 3 This is one of the three-dimensional diagrams of the air outlet cover structure of the present invention; Figure 4 This is the second stereoscopic diagram of the air outlet cover structure of the present invention; Figure 5 This is the third stereoscopic diagram of the air outlet housing structure of the present invention; Figure 6 This is a bottom view of the air outlet cover structure of the present invention; Figure 7 It is a front cross-sectional view of the air inlet cover structure of the present invention; Figure 8 This is a three-dimensional diagram of the air inlet cover structure of the present invention; Fig. 9 This is a bottom view of the air inlet cover structure of the present invention; Fig.10 It is a structural schematic diagram of the air outlet guide plate of the present invention; In the figure: 1. Charging pile; 2. Base; 3. Inspection door 1; 4. Inspection door 2; 5. Air inlet silencing structure; 501. Air inlet cover; 502. Grille air guide plate 1; 503. Conical sound insulation cotton 1; 504. Fan 1; 505. Hook 1; 506. Fixing plate 1; 507. Silencing cotton 1; 508. Air inlet hole; 509. Sealing ring 1; 6. Air outlet silencing structure; 601. Air outlet cover; 602. Air outlet guide plate; 603. Grille air guide plate 2; 604, grille air guide plate 3; 605, ventilation slot 2; 606, conical cotton 2; 607, fan 2; 608, silencer cotton 2; 609, hook 2; 6010, fixing plate 2; 6011, ventilation slot 3; 6012, exhaust hole; 6013, ventilation slot 1; 6014, sealing ring 2; 7, connecting block 2; 8, connecting block 1; 9, activated carbon net; 6021, long strip hole, 6022, short strip hole, 6023, oblong hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Figure 1-10 The present invention includes a charging pile 1, a base 2 is fixedly connected to the bottom of the charging pile 1, an inspection door 3 is arranged on the left side of the charging pile 1, an inspection door 2 is arranged on the right side of the charging pile 1, an air inlet silencer structure 5 is arranged on the left side of the inspection door 1 3, and an air outlet silencer structure 6 is arranged on the right side of the inspection door 2 4.

[0026] The air outlet and silencer structure 6 comprises an air outlet cover 601, an air outlet guide plate 602, a grille air guide plate 2 603, a grille air guide plate 3 604, a ventilation slot 2 605, a conical cotton 2 606, a fan 2 607, a silencer cotton 2 608, a hook 2 609, a fixing plate 2 6010, a ventilation slot 3 6011, an exhaust hole 6012, a ventilation slot 1 6013 and a sealing ring 2 6014. The right side of the inspection door 2 4 is provided with an air outlet cover 601, an air inlet plate 602 is provided on the inner front wall of the air outlet cover 601, a grille air guide plate 2 603 is fixedly connected to the inner front wall of the air outlet cover 601, a grille air guide plate 3 604 is fixedly connected to the inner front wall of the air outlet cover 601, two ventilation slots 3 6011 are provided on the top of the grille air guide plate 3 604, and the outlets above the grille air guide plate 2 603 are provided with a plurality of ventilation slots 3 6011. The rear side wall and the inner top wall of the air hood body 601 are fixedly connected with conical cotton 2 606, the other surfaces of the inner wall of the air outlet hood body 601 are provided with sound-absorbing cotton 2, the inner bottom wall of the air outlet hood body 601 is provided with two fans 2 607, the top and bottom of the grille air guide plate 2 603 and the grille air guide plate 3 604 are provided with sound-absorbing cotton 2 608, the inner top wall of the air outlet hood body 601 is fixedly connected with two hooks 2 609, the bottom of the air outlet hood body 601 is fixedly connected with a fixing plate 2 6010, the top of the grille air guide plate 2 603 is provided with a ventilation slot 2 605, the bottom of the air outlet hood body 601 is provided with an exhaust hole 6012, the left side of the air inlet plate 602 is provided with a plurality of ventilation slots 1 6013, and the left side of the air outlet hood body 601 is fixedly connected with a sealing ring 2 6014.

[0027] The air inlet and silencer structure 5 includes an air inlet cover 501, a grille air guide plate 502, a conical sound insulation cotton 503, a fan 504, a hook 505, a fixing plate 506, a silencer cotton 507, an air inlet hole 508 and a sealing ring 509. The air inlet cover 501 is arranged on the left side of the inspection door 3, and a plurality of grille air guide plates 502 are arranged on the inner front wall of the air inlet cover 501. Conical sound insulation cotton 503 is fixedly connected to the front side wall and the upper inclined plate of the air inlet cover 501. The other surfaces of 501 are provided with sound-absorbing cotton 1, the inner bottom wall of the air inlet cover 501 is provided with two fans 1 504, the inner fixed wall of the air inlet cover 501 is fixedly connected with two hooks 1 505, the bottom of the air inlet cover 501 is fixedly connected with a fixing plate 1 506, the bottom and top surfaces of several grille air guide plates 1 502 are provided with sound-absorbing cotton 1 507, the bottom of the air inlet cover 501 is opened with an air inlet hole 508, and the right side of the air inlet cover 501 is fixedly connected with a sealing ring 1 509.

[0028] In the case implementation, the air inlet cover 501 and the air outlet cover 601 are both made of 2mm thick alloy carbon steel and are integrally formed using a stamping and welding process; the top walls of the air inlet cover 501 and the air outlet cover 601 are designed to be inclined, which has a better guiding effect and is more convenient for taking and placing the charging gun.

[0029] In the case implementation, conical sound insulation cotton 503 and conical cotton 606 are both made of the same flame retardant sound-absorbing material as sound-absorbing cotton 507 and sound-absorbing cotton 608, which have fire retardancy and improve the noise reduction effect.

[0030] In the case implementation, an air inlet hole 508 adapted to the fan 1 504 is provided at the bottom of the air inlet cover 501, so that the outside air can enter the interior of the air inlet cover 501. The air inlet hole 508 and the air outlet hole 6012 are equipped with an activated carbon net 9 for air purification.

[0031] In the case implementation, an exhaust hole 6012 compatible with the second fan 607 is opened at the bottom of the air outlet cover 601 to facilitate the discharge of external air.

[0032] In the case implementation, ventilation holes are provided on the opposite sides of the inspection door 1 3 and the inspection door 2 4 , and a windward hole is provided on the left side of the air inlet plate 602 to facilitate the air inside the charging pile 1 to enter the interior of the air outlet hood 601 .

[0033] In the case implementation, fan one 504 and fan two 607 are connected to the charging pile 1 circuit. When the charging pile 1 is running, fan one 504 and fan two 607 are automatically operated, which can effectively reduce power consumption and reduce energy consumption.

[0034] The middle part of the air outlet guide plate 602 is alternately provided with air guide hole unit 1 and air guide hole unit 2 from top to bottom. Air guide hole unit 1 includes a long strip hole 6021, and air guide hole unit 2 is composed of two short strip holes 6022 with a spacing. The inner wall of the air outlet cover body 601 is provided with a connecting block 2 7, and there is an assembly hole on the connecting block 2 7. The air outlet guide plate 602 is surrounded by oblong holes 6023 that match the assembly holes. The connecting block 2 7 and the air outlet guide plate 602 are connected by bolts installed at the assembly holes and the oblong holes.

[0035] When implementing, follow these steps: 1) First, insert hook 1 505 into the top of access door 1, connect fixing plate 1 506 with access door 1 3 by thread, insert hook 2 609 into the top of access door 2, connect fixing plate 2 6010 with access door 2 4 by thread, and complete the installation; 2) Then the fan 504 runs, sucking the outside air into the air inlet cover 501, and reducing the noise through the conical sound insulation cotton 503 and the sound absorbing cotton 507; 3) Then, the air of the charging pile 1 enters the air outlet cover 601, runs downward through the ventilation slot 2 605 of the grille air guide plate 2 603, and then changes direction and continues to run downward through the two ventilation slots 3 6011 of the grille air guide plate 3 604. Then, the fan 2 607 runs and exhausts the air inside the charging pile 1 through the exhaust hole 6012. The internal air passes through the conical cotton 2 606 and the silencer cotton 2 608 to reduce noise. 4) During the final inspection and replacement, loosen the threads to separate the fixing plate 1 506 from the inspection door 1 3, loosen the threads to separate the fixing plate 2 6010 from the inspection door 2 4, and then move the air inlet cover 501 and the air outlet cover 601 upward to take out, which is convenient for inspection and replacement.

[0036] In summary, the charging pile silencer device which is easy to install is configured with an air inlet silencer structure 5, a hook 505 is inserted into the top of an inspection door 1, a fixing plate 506 is threadedly connected to the inspection door 3, and a fan 504 is operated to suck the outside air into the air inlet cover 501, and the noise is reduced by means of a conical sound insulation cotton 503 and a sound silencing cotton 507.

[0037] In addition, by providing an air outlet and silencer structure 6, the hook 2 609 is inserted into the top of the inspection door 2, the fixing plate 2 6010 is threadedly connected to the inspection door 2 4, and the fan 2 607 is running to discharge the air inside the charging pile 1. The internal air passes through the conical cotton 2 606 and the silencer cotton 2 608 to reduce the noise, thereby solving the problems of consuming a lot of time during maintenance, poor heat dissipation effect and dust easily entering the interior of the charging pile.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silent charging device, wherein an inspection door 1 (3) is provided at the air inlet of the charging pile (1), and an inspection door 2 (4) is provided at the air outlet of the charging pile (1), and the inspection door 1 (3) and the inspection door 2 (4) are provided with shutters, characterized in that: The inspection door 1 (3) is detachably hooked on the door edge to be connected to the air inlet silencer structure (5), and the inspection door 2 (4) is detachably hooked on the door edge to be connected to the air outlet silencer structure (6), and the air inlet silencer structure (5) and the air outlet silencer structure (6) are symmetrically arranged; The air inlet silencer structure (5) comprises a prismatic air inlet cover (501), the side of the air inlet cover (501) having a cover opening for covering the air inlet, the bottom of the air inlet cover (501) having at least one group of air inlet holes, each group of air inlet holes comprising a plurality of air inlet holes 508 arranged in an array, and a fan (504) for air intake is arranged at each group of air inlet holes; the air inlet cover (501) comprises an upper inclined plate, a bottom plate and a plurality of side plates, and the side plates located at the left and right parts are right-angled trapezoidal plates; The inner wall of the air inlet cover (501) is covered with a sound-absorbing layer to form an air inlet sound-absorbing chamber. The top of the air inlet sound-absorbing chamber is inclined with a low front and a high rear. The middle of the air inlet sound-absorbing chamber is an inclined air inlet guide section. The front end of the inclined air inlet guide section is low and the rear end is high. The inclined air inlet guide section is composed of n inclined small channels. The air inlet sound-absorbing chamber at the front end of the inclined air inlet guide section is a short straight air guide section. The projections of the short straight air guide section and the inclined air inlet guide section completely cover the position of the fan 1 (504). The air inlet sound-absorbing chamber at the rear end of the inclined air inlet guide section is a long straight air guide section. The outlet of the long straight air guide section completely covers the position of the shutter on the inspection door 1 (3). The n inclined small channels are separated and arranged by n-1 grille guide plates (502) arranged in a slanted manner from top to bottom in the middle of the air inlet silencer cavity, and the surface of the grille guide plate (502) is covered with a silencer layer; the inclination angle of the grille guide plate (502) and the inclination angle of the upper inclined plate are both equal to the inclination angle of the inspection door shutter blades; the number of the grille guide plates (502) is less than the number of the shutter blades; The air outlet silencer structure (6) comprises an air outlet cover (601) having the same structure as the air inlet cover (501), the side of the air outlet cover (601) having a cover opening for covering the air outlet, the bottom of the air outlet cover (601) having at least one group of air outlet holes, each group of air outlet holes comprising a plurality of air outlet holes (6012) arranged in an array, and a fan 2 (607) for sucking air is provided at each air outlet hole group; The inner wall of the air outlet hood (601) is covered with a sound-absorbing layer to form an air outlet sound-absorbing chamber. The top of the air outlet sound-absorbing chamber is inclined with the front lower and the rear higher. The air outlet sound-absorbing chamber is divided into a front sound-absorbing chamber and a rear sound-absorbing chamber by a vertical air outlet guide plate (602). The opening of the front sound-absorbing chamber completely covers the position of the shutter on the second inspection door (4). The rear sound-absorbing chamber is divided into two or more sound-absorbing spaces by one or more horizontal grille air guide plates. The surfaces of the air outlet guide plate (602) and the horizontal grille air guide plate are covered with a sound-absorbing layer. The distance between the air outlet guide plate (602) and the horizontal grille air guide plate forms an air outlet channel. The horizontal grille air guide plate is provided with ventilation holes.

2. The silent charging device according to claim 1, characterized in that: The vertical air outlet guide plate (602) is installed near the hood opening, and the middle part of the air outlet guide plate (602) is alternately provided with air guide hole unit 1 and air guide hole unit 2 from top to bottom, the air guide hole unit 1 includes a long strip hole (6021), and the air guide hole unit 2 is composed of two short strip holes (6022) with a spacing, and the sum of the number of air guide hole units 1 and air guide hole units 2 is less than the number of shutter blades; the sound-absorbing layer on the surface of the air outlet guide plate (602) has a clearance hole for making way for the air guide hole unit 1 and the air guide hole unit 2, and the sound-absorbing layer on the surface of the horizontal grille air guide plate has a clearance hole for making way for the ventilation holes.

3. The silent charging device according to claim 1, characterized in that: The fan one (504) and the fan two (607) are two fans arranged in parallel, and there are two horizontal grille air guide plates. The horizontal grille air guide plate close to the fan two (607) is provided with a ventilation hole three 6011 corresponding to the fan two (607), and the horizontal grille air guide plate away from the fan two (607) is provided with a ventilation hole two 605.

4. The silent charging device according to claim 1, characterized in that: The air inlet cover (501) and the air outlet cover (601) have hooks on their upper portions, and the air inlet cover (501) and the air outlet cover (601) are hung on the side of the first / second inspection door via the hooks.

5. The silent charging device according to claim 1, characterized in that: The air inlet cover body (501) has a horizontal bent edge at the upper portion of the cover opening, and two or more vertical blocking pieces are provided in the middle of the horizontal bent edge to form a hook; the thickness of the horizontal bent edge is ≤ the gap between the inspection door 1 and the air inlet of the charging pile (1); The lower part of the cover opening is provided with a vertical folding edge bent outwards, and there are mounting holes for mounting screws on the vertical folding edge. The left and right sides of the cover opening are provided with vertical folding edges bent inwards.

6. The silent charging device according to claim 2, characterized in that: The inner wall of the air outlet cover (601) is provided with a second connection block (7), the second connection block (7) has an assembly hole, the air outlet guide plate (602) has oblong holes (6023) matching the assembly hole around it, and the second connection block (7) and the air outlet guide plate (602) are connected by bolts installed at the assembly hole and the oblong hole; The inner wall of the air inlet cover (501) is provided with a connecting block (8) corresponding to each grille air guide plate (502), the connecting block (8) is provided with an assembly hole, the side surface of the grille air guide plate (502) is provided with an oblong hole matching the assembly hole, and the connecting block (8) and the grille air guide plate (502) are connected by bolts installed at the assembly hole and the oblong hole.

7. A method for installing a silent charging device as claimed in claim 6, characterized in that: A symmetrically arranged sound-absorbing structure is detachably hooked and connected on the side of the inspection door at the air inlet and outlet of the charging pile (1), wherein the sound-absorbing structure comprises an air inlet sound-absorbing structure (5) and an air outlet sound-absorbing structure (6); The installation method of the air inlet silencer structure (5) includes: The inner wall of the air inlet cover (501) is covered with a sound-absorbing layer to form an air inlet sound-absorbing chamber. The top of the air inlet sound-absorbing chamber is inclined with a low front and a high rear. A grille air guide plate (502) is installed in the air inlet sound-absorbing chamber. The oblong hole of the grille air guide plate (502) is aligned with the assembly hole on the connecting block (8). The two are pre-assembled together by bolts. The position of the grille air guide plate (502) is adjusted along the oblong hole until the area of ​​the projection of the grille air guide plate (502) on the horizontal plane and the overlapped part of the fan (504) is greater than half of the fan area. The bolts are tightened to fix the position of the grille air guide plate (502). 2) The installation method of the air outlet silencer structure (6) includes: The inner wall of the air outlet hood (601) is covered with a sound-absorbing layer to form an air outlet sound-absorbing chamber. The top of the air outlet sound-absorbing chamber is inclined with the front lower and the rear higher. An air outlet guide plate (602) and a horizontal grille air guide plate are installed in the air outlet sound-absorbing chamber. The air outlet sound-absorbing chamber is divided into a front sound-absorbing chamber and a rear sound-absorbing chamber by a vertical air outlet guide plate (602). The opening of the front sound-absorbing chamber completely covers the position of the shutter on the second inspection door (4). The rear sound-absorbing chamber is divided into two or more sound-absorbing spaces by one or more horizontal grille air guide plates. The surfaces of the air outlet guide plate (602) and the horizontal grille air guide plate are covered with a sound-absorbing layer. ; The distance between the air outlet guide plate (602) and the horizontal grille air guide plate forms an air outlet channel; after the oblong hole of the air outlet guide plate (602) is aligned with the assembly hole of the second connecting block (7), the two are pre-assembled together by bolts, and the position of the air outlet guide plate (602) is adjusted along the oblong hole until the projection of the uppermost / lowermost oblong hole or combination hole of the air outlet guide plate (602) on the inspection door is located outside the shutter, and the second fan (607) is placed behind the air outlet guide plate (602), and the bolts are tightened to fix the position of the air outlet guide plate (602); The power cables of fan 1 (504) and fan 2 (607) are connected to the power module in the charging pile (1).

8. The method for installing a silent charging device according to claim 7, characterized in that: The inspection door is provided with a threading hole for passing the power line.

9. A mute device for a charging device, characterized in that: It includes an air inlet silencing structure (5) and an air outlet silencing structure (6); The air inlet silencer structure (5) comprises a prismatic air inlet cover (501), the side of the air inlet cover (501) having a cover opening for covering the air inlet, the bottom of the air inlet cover (501) having at least one group of air inlet holes, each group of air inlet holes comprising a plurality of air inlet holes 508 arranged in an array, and a fan (504) for air intake is arranged at each group of air inlet holes; the air inlet cover (501) comprises an upper inclined plate, a bottom plate and a plurality of side plates, and the side plates located at the left and right parts are right-angled trapezoidal plates; The inner wall of the air inlet cover (501) is covered with a sound-absorbing layer to form an air inlet sound-absorbing chamber. The top of the air inlet sound-absorbing chamber is inclined with a low front and a high rear. The middle of the air inlet sound-absorbing chamber is an inclined air inlet guide section. The front end of the inclined air inlet guide section is low and the rear end is high. The inclined air inlet guide section is composed of n inclined small channels. The air inlet sound-absorbing chamber at the front end of the inclined air inlet guide section is a short straight air guide section. The projections of the short straight air guide section and the inclined air inlet guide section completely cover the position of the fan 1 (504). The air inlet sound-absorbing chamber at the rear end of the inclined air inlet guide section is a long straight air guide section. The outlet of the long straight air guide section completely covers the position of the shutter on the inspection door 1 (3). The n inclined small channels are separated and arranged by n-1 grille guide plates (502) arranged in a slanted manner from top to bottom in the middle of the air inlet silencer cavity, and the surface of the grille guide plate (502) is covered with a silencer layer; the inclination angle of the grille guide plate (502) and the inclination angle of the upper inclined plate are both equal to the inclination angle of the inspection door shutter blades; the number of the grille guide plates (502) is less than the number of the shutter blades; The air outlet silencer structure (6) comprises an air outlet cover (601) having the same structure as the air inlet cover (501), the side of the air outlet cover (601) having a cover opening for covering the air outlet, the bottom of the air outlet cover (601) having at least one group of air outlet holes, each group of air outlet holes comprising a plurality of air outlet holes (6012) arranged in an array, and a fan 2 (607) for sucking air is provided at each air outlet hole group; The inner wall of the air outlet hood (601) is covered with a sound-absorbing layer to form an air outlet sound-absorbing chamber. The top of the air outlet sound-absorbing chamber is inclined with the front lower and the rear higher. The air outlet sound-absorbing chamber is divided into a front sound-absorbing chamber and a rear sound-absorbing chamber by a vertical air outlet guide plate (602). The opening of the front sound-absorbing chamber completely covers the position of the shutter on the second inspection door (4). The rear sound-absorbing chamber is divided into two or more sound-absorbing spaces by one or more horizontal grille air guide plates. The surfaces of the air outlet guide plate (602) and the horizontal grille air guide plate are covered with a sound-absorbing layer. The distance between the air outlet guide plate (602) and the horizontal grille air guide plate forms an air outlet channel. The horizontal grille air guide plate is provided with ventilation holes. The vertical air outlet guide plate (602) is installed near the hood opening, and the middle part of the air outlet guide plate (602) is alternately provided with air guide hole unit 1 and air guide hole unit 2 from top to bottom, the air guide hole unit 1 includes a long strip hole (6021), and the air guide hole unit 2 is composed of two short strip holes (6022) with a spacing, and the sum of the number of air guide hole units 1 and air guide hole units 2 is less than the number of shutter blades; the sound-absorbing layer on the surface of the air outlet guide plate (602) has a clearance hole for making way for the air guide hole unit 1 and the air guide hole unit 2, and the sound-absorbing layer on the surface of the horizontal grille air guide plate has a clearance hole for making way for the ventilation holes.

10. The silent device for a charging device according to claim 9, characterized in that: The first inspection door (3) has a detachable hook on the door side connected to an air inlet silencer structure (5), and the second inspection door (4) has a detachable hook on the door side connected to an air outlet silencer structure (6), and the air inlet silencer structure (5) and the air outlet silencer structure (6) are symmetrically arranged.

Images