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A power amplifier having a shielding function

A power amplifier and functional technology, applied in the fields of magnetic field/electric field shielding, cooling/ventilation/heating transformation, electrical components, etc., can solve the problems of complicated operation, reduce the service life of the power amplifier, and cannot meet the requirements of use, and increase the sealing performance. , Avoid poor shielding effect, solve the effect of low shielding efficiency

Inactive Publication Date: 2018-12-14
南京禾鑫坊电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the shielding efficiency of the power amplifier shielding device is low, the operation is complicated, and cannot meet the requirements of use. At the same time, the heat dissipation effect of the power amplifier is not good, and it is easy to reduce the service life of the power amplifier.

Method used

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  • A power amplifier having a shielding function
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Include the following steps:

[0034] Step 1. Dissolve 25 parts of polyurethane in a mixed solvent of 120 parts of tetrahydrofuran and 80 parts of dimethylformamide to prepare an electrospinning solution, then add 30 parts of epoxy resin and stir on a magnetic stirrer for 4 hours ;

[0035] Step 2. After the above materials are dissolved evenly, put the solution into the syringe of the electrospinning test bench. Under the action of gravity, the metal needle tip of the syringe will produce solution droplets to hang and adjust the height of the metal needle tip with a diameter of 1.2mm to the receiving device to be 25cm. , turn on the power supply, adjust the voltage to 30KV, and perform spinning to obtain a polymer fiber film;

[0036] Step 2. Take out the soaked polymer fiber film and put it in an oven at 100°C for drying and curing, and set the time for 30 minutes;

[0037] Step 3, immersing 10 parts of the dried polymer fiber film in an aqueous solution containing ...

Embodiment 2

[0047] Step 5. Immerse 9 parts of the dried polymer fiber film in an aqueous solution containing 7 parts of foamed iron-based zinc oxide uniformly dispersed with 1 part of sodium carboxymethylcellulose as a dispersant; the rest of the steps are the same as in Example 1.

Embodiment 3

[0049] Step 5. Immerse 8 parts of the dried polymer fiber film in an aqueous solution containing 7 parts of foamed iron-based zinc oxide uniformly dispersed with 1 part of sodium carboxymethylcellulose as a dispersant; the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a power amplifier with a shielding function, the power amplifier includes a shielding box cover, the shielding box cover is connected with a shielding box body, an electromagnetic shielding layer is laid on the inner surface of the shielding box cover, a conducting layer and a magnetism conducting layer are laid on the inner wall of the shielding box body, the left and right sides of the power amplifier are provided with heat conduction pipe channels, the power amplifier is internally provided with an internal cooling fins, left and right heat conduction pipes are respectively connected at left and right ends of the internal cooling fins, and the left and right heat conduction pipes sequentially stretch out from the power amplifier, a storage cavity and the shielding box body in sequence and are respectively connected with the left and right external cooling fins, and radiating ribs are laid on the surfaces of the left and right external cooling fins. The invention provides the power amplifier with the shielding function, which effectively improves the shielding efficiency by arranging the shielding box, electromagnetic shielding layer, conducting layer andmagnetism conducting layer, and effectively improves the heat dissipation effect of the device by arranging the cooling fins, the heat conduction pipe and the radiating ribs.

Description

technical field [0001] The invention relates to the field of power amplifiers, more specifically, to a power amplifier with a shielding function. Background technique [0002] Power amplifier, referred to as "power amplifier", refers to an amplifier that can generate maximum power output to drive a load (such as a speaker) under a given distortion rate condition. The power amplifier plays a role of "organization and coordination" in the entire audio system. The role of the hub, to a certain extent, determines whether the entire system can provide good sound quality output. The high output frequency of the power amplifier will generate a space radiation electromagnetic field. In order to make the power amplifier work stably, each part of the circuit does not affect each other. To reduce radiation at the same time, it is necessary to set a shielding device for the power amplifier. [0003] At present, the shielding efficiency of the power amplifier shielding device is low, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00H05K7/20H05K5/06
CPCH05K9/0007H05K5/061H05K7/20409H05K7/20445H05K9/0015
Inventor 曹其动王智风胡洋
Owner 南京禾鑫坊电子科技有限公司
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