CN112096660A

CN112096660A - Noise reduction device and method and outdoor direct current charging pile using same

Info

Publication number: CN112096660A
Application number: CN202010845392.7A
Authority: CN
Inventors: 刘峰; 于红亮; 车磊; 刘亚光; 李欢; 冯亚森; 唐光伟; 吴彦
Original assignee: Shijiazhuang Tonghe Electronics Co Ltd
Current assignee: Shijiazhuang Tonghe Electronics Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-12-18

Abstract

A noise reduction device, a noise reduction method and an outdoor direct current charging pile using the device are disclosed, wherein air enters a front air inlet buffer member from an air inlet device, an air channel of a noise reduction process device and an internal charging module of the noise reduction process device in sequence, is output to an air outlet buffer member through a fan serving as airflow direction source power, and is then discharged from an air outlet device; simultaneously, the air current is behind the air inlet bolster, at first weakens through one-level orifice plate, and the back gets into second grade spill orifice plate, produces and collides and the buffering, and the sound wave is mutual interference, reduces air speed, and the bolster inner wall is pasted simultaneously and is inhaled the sound cotton, and the air current gets into the fan after going into tertiary orifice plate further weakening after weakening again, inhales the fan through convulsions with the air current after weakening and leads to the air-out bolster side by side, and the air current is disturbed the weakening back by buffering sound wave, and the air current is further weakening through going out the air-out device again. The noise pollution is reduced by means of the noise reduction device, and the situations of disturbance to residents, poor user experience and temporary deafness of field personnel in operation and maintenance are reduced.

Description

Noise reduction device and method and outdoor direct current charging pile using same

Technical Field

The invention relates to the field of electric vehicle charging piles, in particular to a noise reduction method and device and an outdoor direct current charging pile using the same.

Background

Outdoor direct current fills electric pile and for the long-term steady operation of guarantee equipment when the operation, has structurally been equipped with cooling blower and has been used for reducing inside components and parts heat to prevent to damage. But the fan has produced noise pollution simultaneously, leads to disturbing the citizen, and especially in evening, the noise is more obvious. In addition, it also creates a "buzzing" noise nuisance and a poor experience for field charging personnel and maintenance personnel. Generally, the main source of noise is heat dissipation fan noise.

To solve the above problems, a person skilled in the art has diligently made efforts, such as the patent of chinese patent publication No. CN 105142379 a, which discloses a noise reduction cabinet. This rack is except that the body rack, increases the inner cover body simultaneously, the outer cover body reaches between the multilayer soundproof cotton, forms a big cover body and reaches the purpose of making an uproar of falling, but, its actual two sets of shells that have increased have become three sets of racks in other words, can cause the rack to take up an area of bulky, and the actual incremental cost increases greatly. In addition, although the arched fan pipe can reduce part of noise, the noise reduction effect is not obvious.

In addition, chinese patent publication No. CN109823220A discloses a single-channel heat dissipation power module for a dc charging pile, which optimizes the problem of heat dissipation through air ducts during long-term operation, but does not actually solve the problem of noise.

The patent of chinese patent publication No. CN207291726U discloses a noise elimination device for dc charging pile, which forms a shield by attaching sound insulation material on the inner wall, the principle of the device is similar to that of the first prior patent CN 105142379 a, the device can only increase the volume of the whole device to ensure the installation space of the internal devices, and the noise reduction effect is not solved from the source.

Disclosure of Invention

In order to solve the problems of noise pollution, disturbance to residents and the like in the operation of the outdoor direct-current charging pile in the prior art, particularly the outstanding problems that noise is particularly prominent when residents work at night, and temporary deafness occurs to field maintenance personnel and experience is not good when field users are charged are solved. It is another object of the present invention to provide a method of noise reduction.

In order to achieve the above purpose, the present invention provides a noise reduction device, which includes an air inlet 101, an air inlet insect-proof net 102, an air inlet louver 103, a dustproof cotton integrated piece 104, an air duct 201, an air duct internal charging module 202, a fan cover 203, an air inlet buffer 204 (including a primary sieve plate 401, a secondary concave sieve plate 402, a tertiary sieve plate 403, and inner wall sound-absorbing cotton 404), a fan 205, an air outlet buffer 206 (same as 204), a sealing rubber strip 207, an air outlet louver 303, an air outlet insect-proof net 302, and an air outlet 301.

Wherein, the air inlet hole, the air inlet insect-proof net, the air inlet shutter and the dustproof cotton are air inlet devices; the air duct and an internal charging module thereof, the fan cover, the air inlet buffer part, the fan, the air outlet buffer part are noise reduction process devices; the air outlet shutter, the air outlet insect-proof net and the air outlet hole are air outlet devices.

The noise reduction process device may also include an outer ring bead 207.

The invention also provides a noise reduction method. Which may comprise the apparatus of any of the preceding claims.

The invention also provides an outdoor direct current charging pile using the device, which can comprise any one of the devices or any one of the noise reduction methods.

Preferably, the outdoor direct current fills electric pile's rack is except that the inlet-outlet exhaust vent, and the during operation other places are for keeping airtight state.

The dust-proof cotton 104 can be an integrated member with a frame, which is convenient to disassemble and replace, and the charging module 202 is a main heat dissipation component of the invention and needs to be installed at the front part of the air duct.

The invention has the beneficial effects that by means of the technical scheme, the noise of the whole machine is reduced, meanwhile, the noise reduction device is skillfully designed aiming at the noise protruding part of the fan under the condition of not influencing the heat dissipation and ventilation effects so as to reduce noise pollution, and the situations of disturbance to people, poor user experience and temporary deafness of operation and maintenance of field personnel are reduced. The invention carries out traceability improvement on noise, and aims at the main noise sources: the fan carries out the air current weakening around, and the secondary noise that produces when simultaneously to main control components and parts operation is concentrated to the wind channel through the fan air current and is weakened in the lump. The device has small volume, is embedded in the cabinet, does not influence the appearance of the cabinet, has the advantage of low cost, has obvious noise reduction effect, integrates the dustproof and waterproof functions, can reach the protection level above IP54 of the outdoor cabinet, is also suitable for other cabinets with heat dissipation fans to reduce noise and the like, and has wide application.

Drawings

Fig. 1a and 1b are an overall structure and a cross-sectional view of an outdoor dc charging pile to which the noise reduction device and method of the present invention are applied.

FIG. 2 is a schematic view of the intake air device portion of the present invention.

Fig. 3a and 3b are front views and cross-sectional schematic views of the air intake device of the present invention.

Fig. 4 is a schematic view of a portion of a noise reducer of the present invention.

Fig. 5a, 5b are cross-sectional views of a noise reducer of the present invention and schematic side views thereof.

Fig. 6 is a schematic view of a portion of an air outlet device according to an embodiment of the present invention.

FIG. 7 is a schematic view of a portion of a cushioning device according to an embodiment of the present invention.

Fig. 8 is a schematic view of the noise reduction device, method and outdoor dc charging pile using the device according to the present invention.

Wherein:

101 air inlet hole 102 air inlet insect-proof net

103 air inlet shutter 104 dustproof cotton integrated piece

201 air flue 202 air flue internal charging module

203 fan guard 204 air inlet buffer

205 fan 206 air-out buffer

207 sealing rubber strip

302 air-out insect-proof net of 303 air-out shutter

301 air outlet

401 primary screen hole plate 402 secondary concave hole plate

403 three-level sieve plate 404 inner wall sound absorption cotton

501, main control of components.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

For the purpose of clearly describing a noise reduction device, a method and an outdoor dc charging post using the same of the present invention, an embodiment of the invention is described.

In this embodiment, please refer to fig. 1 to 8, wherein fig. 1a and 1b are an overall structure and a sectional view of an outdoor dc charging pile according to the present invention. Fig. 2 is a perspective exploded view of the intake assembly of the present invention. Fig. 3a and 3B are front views and B-direction cross-sectional views of an air intake device according to the present invention (referring to the three-dimensional schematic structure of fig. 2). Fig. 4 is an exploded view of the interior of the noise reduction device in the noise reduction device according to the present invention. Fig. 5a and 5b are schematic cross-sectional views and side views of a noise reducer C of the present invention (shown in fig. 4). Fig. 6 is a schematic exploded perspective view of an air outlet device according to an embodiment of the present invention. Fig. 7 is a schematic structural diagram of a buffering device according to an embodiment of the present invention. Fig. 8 is a schematic view of the overall airflow direction of a noise reduction device, a noise reduction method and an outdoor dc charging pile using the noise reduction device.

Specifically, the invention mainly comprises the following schemes:

a noise reduction device is mainly composed of an air inlet device, a noise reduction device and an air outlet device, and specifically comprises an air inlet hole 101, an air inlet insect-proof net 102, an air inlet shutter 103, a dustproof cotton integrated piece 104, an air duct 201, an air duct internal charging module 202, a fan cover 203, an air inlet buffer 204 (comprising a primary sieve plate 401, a secondary concave sieve plate 402, a tertiary sieve plate 403 and inner wall sound-absorbing cotton 404, see fig. 7), a fan 205, an air outlet buffer 206 (the structure can be the same as that of the air inlet buffer 204), a sealing rubber strip 207, an air outlet shutter 303, an air outlet insect-proof net 302 and an air outlet hole 301.

Wherein, the air inlet hole 101, the air inlet insect-proof net 102, the air inlet shutter 103 and the dustproof cotton (the dustproof cotton integrated piece 104) form an air inlet device; the air duct 201 and the internal charging module 202 thereof, the fan cover 203, the air inlet buffer 204, the fan 205, the air outlet buffer 206 and the sealing rubber strip 207 form a noise reduction process device; the air outlet shutter 303, the air outlet insect-proof net 302 and the air outlet 301 form an air outlet device.

Among other things, in this particular embodiment of the present invention, the following specification may be had:

1. the shape of the air inlet hole 101 includes, but is not limited to, a circle, a strip, a diamond or other shapes.

2. The material and the mesh number of the air inlet insect-proof net 102 are adjusted according to the actual use environment.

3. In this embodiment, the air inlet shutter 103 is formed by laminating and welding metal plate strips in a staggered manner, so as to prevent water and prevent air from being blocked.

4. The dustproof cotton 104 is an integrated piece with a frame, so that the dustproof cotton is convenient to disassemble and replace.

5. The air duct 201 is a housing of the entire noise reduction device, and has upper and lower surfaces, left and right side surfaces, and a square duct shape is formed inside.

6. The charging module 202 is a main heat dissipation component of the present invention and needs to be installed in the front of the air duct.

7. The rear part of the air duct is a fan cover 203, an air inlet buffer 204, a fan 205, an air outlet buffer 206 and an outer ring sealing rubber strip 207 are sequentially embedded in the fan cover 203, and the components are tightly fixed with the fan cover 203 and cannot be loosened and shaken.

8. The buffer part is divided into a front sieve plate, a rear sieve plate and an internal embedded concave sieve plate, the front sieve plate and the rear sieve plate can be made of stainless steel, and the concave sieve plate is a metal plate stamping or injection molding part.

9. The air outlet louver 303 is similar in structure to the air inlet louver 103.

10. The outlet air insect net 302 is similar to the inlet air insect net 102.

11. The outlet opening 301 is configured similarly to the inlet opening 101.

12. Wherein, for the guarantee fan operation stability, avoid appearing the windage, each part ventilation volume needs the satisfied condition: the air quantity of the air inlet hole is larger than or equal to that of the air outlet hole and is larger than or equal to that of the fan.

13. Except the air inlet and outlet holes, the other places of the cabinet are kept in a closed state during working.

And secondly, a noise reduction method.

In this embodiment, the method is applied to the foregoing apparatus, and may include the following steps: (see FIG. 1 and FIG. 4)

The method is that air enters a front air inlet buffer 204 (through calculation, preferably, the ventilation area of the air inlet buffer is that the air inlet area of the fan is more than or equal to 1.1: 1) from an air inlet hole 101, an air inlet insect-proof net 102, an air inlet shutter 103, dustproof cotton, an air channel 201 and an internal charging module 202 thereof in sequence under the suction action of the fan, meanwhile, after passing through the air inlet buffer 204, the air flow is firstly weakened through the first-stage sieve pore plate and then enters the second-stage concave pore plate to generate collision and buffering, the sound waves are mutually interfered, the air flow speed is reduced, meanwhile, the inner wall of the buffer piece is pasted with sound absorption cotton, the airflow is weakened again and enters the third-level sieve pore plate to be further weakened and then enters the fan 205 (through calculation, the preferable first-level sieve pore diameter is larger than the third-level sieve pore diameter, in addition, the area of the middle second-level concave pore is between the first-level sieve pore area and the third-level sieve pore area). The fan 205 is used as the power of the airflow direction source, the weakened airflow is sucked into the fan 205 and is arranged to the air outlet buffer 206 through air draft, and similarly, the airflow passes through the air outlet buffer 206, is weakened by the buffer sound wave interference, is further weakened through the air outlet shutter 303, and is discharged from the air outlet insect-proof net 302 and the air outlet hole 301. The method is also suitable for other methods for reducing noise of the cabinet with the cooling fan. The noise reduction can be achieved by the method through changing the shape and the material or partially adding, deleting, integrating and the like, and all the schemes are included in the method.

Third, outdoor direct current fills electric pile

An embodiment of the present invention provides an outdoor dc charging post using the above device and method, which comprises any one of the above devices, and the noise reduction method described above.

In outdoor direct current fills electric pile, its rack is except that the inlet-outlet vent, and the during operation other places are for keeping airtight state, and this air inlet unit preferred is located the lower part of this rack, just to main control components and parts 501, makes its air inlet blow to the surface of main control components and parts 501 to upward flow gets into the noise reduction unit who falls to be located this rack upper end and blows out through the air-out device that is located this rack upper portion rear end.

The noise is traced and improved by using the device, and the device aims at the main noise source: the fan weakens front and rear air flows, and secondary noise generated when the main control component 501 operates is concentrated to the air duct and weakened through the fan air flow. The device has small volume, is embedded in the cabinet, does not influence the appearance of the cabinet, has the advantage of low cost, has obvious noise reduction effect, integrates the dustproof and waterproof functions, can reach the protection level above IP54 of the outdoor cabinet, is also suitable for other cabinets with heat dissipation fans to reduce noise and the like, and has wide application.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.

Claims

1. A noise reduction device is characterized by mainly comprising an air inlet device, a noise reduction device and an air outlet device, wherein the noise reduction device mainly comprises an air duct (201) and an internal charging module (202) thereof, a fan cover (203), an air inlet buffer (204), a fan (205) and an air outlet buffer (206);

the air duct (201) is a shell of the whole noise reduction device, is provided with an upper surface, a lower surface, a left side surface and a right side surface, and is formed into a square duct shape, the rear part of the air duct (201) is a fan cover (203), and the air inlet buffer piece (204), a fan (205) used as airflow direction source power and an air outlet buffer piece (206) are sequentially and tightly fixed inside the fan cover (203);

the air inlet buffer piece (204) and the air outlet buffer piece (206) respectively comprise a primary sieve pore plate (401), a secondary concave pore plate (402), a tertiary sieve pore plate (403) and inner wall sound absorption cotton (404);

under the pumping action of the fan, air enters the front air inlet buffer member from the air inlet device, the air channel of the noise reduction process device and the internal charging module thereof in sequence, is output to the air outlet buffer member (206) through the fan (205) serving as the source power of the airflow direction, and is then discharged by the air outlet device;

simultaneously, the air current is behind the air inlet bolster, at first weakens through one-level orifice plate, and the back gets into second grade spill orifice plate, produces and collides and the buffering, and the sound wave is mutual interference, reduces air speed, and the bolster inner wall is pasted simultaneously and is inhaled the sound cotton, and the air current gets into the fan after going into tertiary orifice plate further weakening after weakening again, inhales the fan through convulsions with the air current after weakening and leads to the air-out bolster side by side, and the air current is disturbed the weakening back by buffering sound wave, and the air current is further weakening through going out the air-out device again.

2. The noise reducer according to claim 1, wherein the air intake device is mainly composed of an air intake hole (101), an air intake insect-proof net (102), an air intake louver (103), and dust cotton; the air outlet device mainly comprises an air outlet shutter (303), an air outlet insect-proof net (302) and an air outlet hole (301).

3. The noise reducer according to claim 1, wherein the primary perforated plate (401), the secondary concave perforated plate (402), the tertiary perforated plate (403), and the inner wall sound-absorbing cotton (404) are respectively a front perforated plate, a rear perforated plate and an inner embedded concave perforated plate of the buffer member, the front and rear perforated plates are made of stainless steel, and the concave perforated plates are formed by stamping metal plates or injection molding.

4. A noise reducing device according to any one of claims 1 to 3, wherein: the ventilation air volume of each part needs to meet the conditions: the air quantity of the air inlet hole is larger than or equal to that of the air outlet hole and is larger than or equal to that required by the fan, so that the stable operation of the fan is ensured, and the wind resistance is avoided.

5. A noise reducing device according to any of claims 1 to 3, wherein the ventilating area of the inlet buffer is: the air inlet area of the fan is more than or equal to 1.1: 1.

6. a noise reducer according to any of claims 1-3, wherein the relationship between the primary (401), secondary (402) and tertiary (403) perforated sheets is: the aperture of the first-level sieve pore is larger than that of the third-level sieve pore, and the area of the middle second-level concave hole is between the area of the first-level sieve pore and the area of the third-level sieve pore.

7. A noise reducing arrangement according to claim 2,

the air inlet shutter (103) or the air outlet shutter (303) is formed by sheet metal strips through staggered lamination welding, so that the air inlet is not blocked while the water is prevented.

8. A noise reducing device according to claim 2, characterized in that the shape of the air inlet openings (101) includes, but is not limited to, circular, elongated, diamond; dustproof cotton (104) are for conveniently dismantling the integrative piece of the frame of taking of changing, the module of charging (202) is main heat dissipation components and parts, need install to the wind channel front portion.

9. A noise reduction method applied to the noise reduction apparatus according to any of the preceding claims, comprising the steps of:

air is exhausted from the air inlet device, the noise reduction process device and the air outlet device in sequence under the suction action of the fan, enters the front air buffer part through the air channel and the internal charging module,

in the noise reduction process device, the air flow is firstly weakened through a primary sieve plate of an air inlet buffer part and then enters a secondary concave sieve plate to generate collision and buffering, the air flow speed is reduced by means of mutual interference of sound waves, and meanwhile, the air flow is weakened again and then enters a tertiary sieve plate to be further weakened through sound absorption cotton attached to the inner wall of the buffer part and then enters a fan (205);

the weakened airflow is exhausted by the air inlet fan (205) and is arranged to the air outlet buffer (206);

in the wind buffer member (206), the air flow is weakened by the buffering sound wave interference, further weakened by the air outlet shutter 303 of the air outlet device, and finally discharged from the air outlet insect-proof net 302 and the air outlet hole 301 of the air outlet device.

10. An outdoor direct current charging pile, characterized in that it comprises the noise reduction device or uses the noise reduction method of any preceding claim.