Frequency converter for refrigerator
A frequency converter and refrigerator technology, applied in the field of frequency converters, can solve problems such as strong electromagnetic interference in the grid and space, and high noise in refrigerators and frequency converters
Pending Publication Date: 2018-09-07
CHANGHONG MEILING CO LTD
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Problems solved by technology
[0005] The object of the present invention is to provide a frequency converter used in refrigerators. By providing a frequency converter with a filter circuit and a frequency conversion circuit, the electromagnetic interference generated by electronic circuit components and frequency converters is filtered to solve the problem of refrigerators and frequency converters. The problem of large noise generated during work and strong electromagnetic interference to the grid and space
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0020] see Figure 1 to Figure 2 As shown, a frequency converter used in a refrigerator of the present invention has a frequency converter circuit board, a filter circuit and a frequency conversion circuit are arranged on the frequency converter circuit board, and one end of the filter circuit is connected to the mains input port for receiving AC signals. The other end is connected to the frequency conversion circuit to provide power filtering function, which can n...
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The invention discloses a frequency converter for a refrigerator, and relates to the technical field of refrigerators. The frequency converter is provided with a frequency converter circuit board, wherein a filtering circuit and a frequency conversion circuit are arranged on the frequency converter circuit board, one end of the filtering circuit is connected with a mains supply input port, the other end of the filtering circuit is connected to a frequency conversion output port, the filtering circuit comprises a common-mode filtering circuit, a differential-mode filtering circuit and a discharging circuit, and the frequency conversion circuit comprises a rectification part, a power supply part, a frequency conversion control part and an inversion part. By providing the frequency converterwith the filtering circuit and the frequency conversion circuit, electromagnetic interference generated by an electronic circuit component and the frequency converter is filtered, the noise generatedby the refrigerator and the frequency converter during the working process is reduced, and the strong electromagnetic interference of a power grid and a space on the refrigerator and the frequency converter is reduced.
Description
technical field [0001] The invention belongs to the technical field of refrigerators, in particular to a frequency converter used in refrigerators. Background technique [0002] Due to its working principle, the frequency converter has multiple electronic components in high-speed switching state when the frequency converter is running, which itself is a strong source of EMI noise. The EMI noise generated by it has a wide frequency range and high strength. These high-density, wide-spectrum electromagnetic interference noises pollute the electromagnetic environment through radiation and conduction, and affect the normal operation of the power grid and even other electronic and electrical equipment in the entire space. Therefore, equipment and power supplies are required to have higher electromagnetic compatibility. [0003] The power supply of electronic and electrical equipment, such as 220V / 50Hz AC power grid, has all kinds of EMI noise. Among them, man-made EMI interferenc...
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IPC IPC(8): H02M5/42H02M1/44
CPCH02M1/44H02M5/42
Inventor 朱忠浩李子胜罗伦
Owner CHANGHONG MEILING CO LTD