Power supply device, electric appliance and filter circuit

Abstract

The invention discloses a power supply device, an electric appliance and a filter circuit. The power supply device comprises a rectification circuit, a filter circuit and a switching power supply, andthe rectification circuit is connected with power supply input and used for rectifying an input signal and outputting a rectification signal; the filter circuit is connected with the rectification circuit and used for filtering the rectification signal and outputting a filtering signal, the filter circuit comprises a plurality of RC filter units, and the plurality of RC filter units are connectedin series; and the switching power supply is connected with the filter circuit and is used for processing the filter signal to output load power. According to the power supply device, the electric appliance and the filter circuit, by arranging the multiple stages of RC filter units, the voltage resistance of the filter circuit can be improved, impact caused by power supply fluctuation can be resisted more effectively, and the power supply device is simple in structure and suitable for production.

Description

technical field [0001] The invention belongs to the technical field of electric appliance manufacturing, and in particular relates to a power supply device, an electric appliance including the power supply device, and a filter circuit. Background technique [0002] The rectifier and filter circuit has a crucial influence on the reliability and life of electrical appliances, and the life of filter capacitors often depends on voltage, ripple current, and temperature rise. The quality of power grid voltage varies from country to region. In areas with poor quality, there are many cases where filter capacitors fail due to long-term power grid fluctuations and nonlinear regulated power supply impacts, resulting in overvoltage of filter capacitors. Moreover, capacitors with high voltage resistance are often bulky, not suitable for production, and the process is complicated, so they are not favored by relatives. Contents of the invention [0003] The present invention aims to sol...

AI Technical Summary

Problems solved by technology

[0002] The rectifier and filter circuit has a crucial influence on the reliability and life of electrical appliances, and the life of filter capacitors often depends on voltage, ripple current, and temperature rise. The quality of power grid voltage varies from country to region. In areas with poor quality, there are many cases where filter capacitors fail due to long-term power grid fluctuations and nonlinear regulated power supply impacts, resulting in overvoltage of filter capacitors.

Moreover, high-voltage-resistant capacitors are often bulky, not suitable for production, and the process is complicated, so they are not trusted by relatives.

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