Noise reduction device for charging pile

Abstract

The utility model discloses a noise reduction device for a charging pile. The noise reduction device comprises a charging pile body and a resistive silencer connected with the charging pile body, the resistive silencing device comprises a fixing frame, an air guide barrel and sound absorption cotton, one side of the fixing frame is fixedly installed on the charging pile body, the other side of the fixing frame is connected with the air guide barrel, and the sound absorption cotton is arranged in the air guide barrel. Compared with the prior art, the noise reduction device for the charging pile has the advantages of being good in noise reduction effect and convenient to maintain and use.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, and in particular to a charging pile noise reduction device. Background Art

[0002] With the maturity of electric vehicle battery technology and the large-scale promotion and use of electric vehicles, electric vehicles will gradually become the focus of China's automobile industry and energy development. The key problem that electric vehicles need to solve is the charging problem. One of the prominent industry pain points of the charging problem is the high noise. The fundamental reason for the noise is that high-power charging is used to meet the rapid energy replenishment, which in turn increases the demand for cooling fans. The operation and vibration of the cooling fans will generate noise, which has a great impact on residents' lives.

[0003] Chinese patent application publication number CN114256747A proposes a solution of adding a "maze" structure on the air inlet and outlet sides. This solution can solve the problem of noise reduction on the air inlet side, but the resistance on the air outlet side will increase, which may easily cause problems such as large internal heat collection. Chinese patent CN217197808U proposes a staggered noise reduction solution. However, this solution has the problem of not being effective due to the short distance of the noise reduction channel.

[0004] At present, there are the following problems with DC charging piles on the market:

[0005] 1. Close to residential areas, noisy;

[0006] 2. The internal space is small and noise reduction is not easy. Utility Model Content

[0007] 1. Problems to be solved

[0008] The technical problem to be solved by the utility model is that the DC charging piles currently on the market produce relatively large noises when in use, and at the same time, the internal space is narrow, making it difficult to perform noise reduction processing.

[0009] (II) Technical solution

[0010] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a charging pile noise reduction device, comprising a charging pile body and a resistive silencing device connected to the charging pile body;

[0011] The resistive silencer device includes a fixed frame, an air duct and sound-absorbing cotton. One side of the fixed frame is fixedly mounted on the charging pile body, and the other side is connected to the air duct. The sound-absorbing cotton is arranged in the air duct.

[0012] As an improvement, the fixed frame includes an outer frame and an inner frame. The outer frame is fixed at the air outlet and the air inlet of the charging pile body. Connectors are provided between the outer frame and the inner frame to connect and fix them.

[0013] As an improvement, a matrix steel mesh is provided on the outer frame.

[0014] As an improvement, shutters are provided on the inner frame.

[0015] As an improvement, the surface of the sound-absorbing cotton is provided with wave-shaped protrusions, and the wind is absorbed by the wave-shaped sound-absorbing cotton at the air inlet and the air outlet.

[0016] As an improvement, the air outlet is connected to a fan.

[0017] As an improvement, the air guide tube is a rectangular structure.

[0018] As an improvement, the connecting piece is a bolt.

[0019] (III) Beneficial effects

[0020] The advantages of the utility model compared with the prior art are: the various structural parts in the application can adopt lightweight sound-absorbing and sound-insulating materials, which can ensure the sound insulation effect while being convenient for manual movement and use. At the same time, it is fire-retardant and the installation of various components is also convenient for maintenance. The surface of the sound-absorbing cotton is provided with wavy protrusions, and the wind is absorbed by the wavy sound-absorbing cotton at the air inlet and outlet, further increasing the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the air duct structure of the first embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a resistive muffler assembly according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the air guide tube and sound-absorbing cotton structure of Example 1 of the present invention.

[0024] As shown in the figure: 1-resistive silencer; 2-outer frame; 3-matrix steel mesh; 4-louver; 5-air guide tube; 6-wave sound absorption; 7-body. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0026] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0030] Please refer to the attached Figure 1-3 , a charging pile noise reduction device, comprising: a charging pile body and a resistive silencing device connected to the charging pile body;

[0031] The frequency spectrum of fan noise is a composite spectrum, which is the superposition of the blade passing frequency and the broadband aerodynamic noise component. The blade passing frequency is determined by the following formula:

[0032] f n =Nbn / 60(Hz)

[0033] Ideal soundproof screen with infinite length and no sound penetration:

[0034]

[0035] Fresnel number:

[0036]

[0037] The resistive silencing device is installed at the air inlet and air outlet of the charging pile body. The side of the charging pile body is provided with an air inlet, and the air outlet is used to connect to the fan. The charging pile body is connected to the resistive silencing device, and the resistive silencing device is arranged opposite to the air outlet.

[0038] The resistive silencer comprises an outer frame, a matrix steel mesh is fixed inside the outer frame, a shutter is fixed on the inner frame, and the inner frame is connected and fixed to the outer frame through a connecting piece, and the connecting piece is a bolt.

[0039] The outer frame is connected and fixed to the air guide tube assembly, the wave sound-absorbing cotton is arranged in the air guide tube assembly, and the wind is absorbed by the wave sound-absorbing cotton at the air inlet and the air outlet.

[0040] The surface of the wave sound-absorbing cotton is provided with wave-shaped protrusions.

[0041] When in use, a fan is arranged at the air inlet of the charging pile body, and the charging pile noise reduction device is installed at the air inlet and air outlet of the charging pile body respectively. The wind is absorbed by the wave sound-absorbing cotton in the resistive silencer device at the air inlet and air outlet.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0044] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A charging pile noise reduction device, characterized in that: It includes a charging pile body and a resistive silencing device connected to the charging pile body; The resistive silencer device includes a fixed frame, an air duct and sound-absorbing cotton. One side of the fixed frame is fixedly mounted on the charging pile body, and the other side is connected to the air duct. The sound-absorbing cotton is arranged in the air duct.

2. A charging pile noise reduction device according to claim 1, characterized in that: The fixed frame comprises an outer frame and an inner frame. The outer frame is fixed at the air outlet and the air inlet of the charging pile body. Connectors are provided between the outer frame and the inner frame to connect and fix them.

3. A charging pile noise reduction device according to claim 2, characterized in that: A matrix steel mesh is arranged on the outer frame.

4. A charging pile noise reduction device according to claim 2, characterized in that: The inner frame is provided with shutters.

5. The charging pile noise reduction device according to claim 1, characterized in that: The surface of the sound-absorbing cotton is provided with wave-shaped protrusions, and wind is absorbed by the wave-shaped sound-absorbing cotton at the air inlet and the air outlet.

6. A charging pile noise reduction device according to claim 2, characterized in that: The air outlet is connected to the fan.

7. A charging pile noise reduction device according to claim 1, characterized in that: The air guide tube is a rectangular structure.

8. A charging pile noise reduction device according to claim 2, characterized in that: The connecting piece is a bolt.

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