Process method for reducing noise of film capacitor

Abstract

The invention relates to a heat treatment method for reducing the noise of a film capacitor, in particular to the heat treatment method for a film capacitor core. The heat treatment method comprises the following process steps of: firstly, carrying out heat setting treatment on the wound film capacitor core in a heat setting tank at the constant treatment temperature of 100DEG C for 6 hours undera vacuum condition; secondly, keeping the film capacitor core subjected to heat setting treatment in the heat setting tank for 2 hours without heating under a non-vacuum condition; thirdly, transferring the film capacitor core from the heat setting tank to a heat-radiating chamber, controlling the temperature of the heat-radiating chamber to be 30-40DEG C, keeping the relative humidity of the heat-radiating chamber below 60 percent and slowly dissipating heat for 10-12 hours; and fourthly, transferring the film capacitor core from the heat-radiating chamber to an assembly workshop, controlling the temperature of the assembly workshop to be 25-30DEG C and keeping the temperature for over 2 hours and then starting entering a next assembly work procedure.

Description

【Technical field】 [0001] The invention relates to the field of film capacitor manufacturing, in particular to a heat treatment method for reducing the noise of the film capacitor. 【Background technique】 [0002] With the continuous development of the electronics industry, more and more electronic devices are required to have high performance, long life, low cost, and low noise. Especially for electronic devices used in home appliances, the noise requirements of the products are as low as possible. For example, in the air-conditioning industry, models with quietness as the selling point are popular in the market. Such as a metallized film capacitor, which includes a plastic mandrel and a gold-sprayed layer. Outside the gold-sprayed layer, there are multiple alternately covered film layers and metallized evaporation layers. During the manufacturing process of the film capacitor, the film capacitor is heat-treated After the process, the air inside the capacitor core is removed...

AI Technical Summary

Problems solved by technology

Such as a metallized film capacitor, which includes a plastic mandrel and a gold-sprayed layer. Outside the gold-sprayed layer, there are multiple alternately covered film layers and metallized evaporation layers. During the manufacturing process of the film capacitor, the film capacitor is heat-treated After the process, the air inside the capacitor core is removed by heat setting, so that the film layers are as close as possible, but the film capacitor core is directly placed at room temperature during the cooling process after heat setting. Then assemble again, the cooling time is short, generally 4 to 6 hours, due to the rapid cooling, the sound of "crackling" can be heard during the cooling process, which is the result of the release of the stress existing between the films. After the stress of the film is released, there are many small gaps between the film layers, resulting in a large gap between the film layers, which directly leads to the increase of the noise of the film capacitor, which is used in household appliances. After being put on, it directly leads to the level of product noise, which affects the overall performance of the product. Therefore, it is urgent to solve the noise problem of film capacitors used in the startup and operation of household appliances

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