Wide voltage input circuit and refrigeration equipment

Abstract

The invention discloses a wide-voltage input circuit and refrigerating equipment. The wide-voltage input circuit comprises alternating current power supply input, and a rectifying and filtering circuit, a PFC voltage boosting circuit and a PFC voltage boosting circuit start-stop control circuit connected with the alternating current power supply input; the PFC voltage boosting circuit is connected with the output end of the rectifying and filtering circuit and used for converting the output of the rectifying and filtering circuit into a stable high voltage to be output; the input end of the PFC voltage boosting circuit start-stop control circuit is connected with the alternating current power supply input while the output end is connected with the control input end of the PFC voltage boosting circuit for controlling the PFC voltage boosting circuit to be started when the alternating current power supply input is less than a set threshold value; the PFC voltage boosting circuit outputs a stable high voltage in a low-voltage input condition; the PFC voltage boosting circuit is controlled to be closed when the alternating current power supply input is greater than the set threshold value, and a normal alternating current conversion circuit works to output a working voltage, so that stable output within a wide-voltage input range can be realized; and normal operation of a load in the wide-voltage input range can be ensured.

Description

technical field [0001] The invention belongs to the technical field of circuit design, and in particular relates to a wide-voltage input circuit and an air conditioner. Background technique [0002] Refrigeration equipment powered by mains power, such as commercial refrigerators, takes the market application with a voltage input of 220V as an example. Considering the situation of voltage fluctuations, in order to ensure that the refrigerators can work normally within the range of voltage fluctuations, the voltage working range is usually limited to Between 220V±20% (186V-264V). [0003] However, in underdeveloped regions such as Asia, Africa and Latin America, the voltage fluctuation range is very large due to insufficient transformer capacity, and the low voltage value may drop to 110V, which will cause the problem that the refrigeration equipment cannot work normally. [0004] At present, the main solution is to connect a voltage stabilizer to the power input terminal to ...

AI Technical Summary

Problems solved by technology

[0005] This application provides a wide voltage input circuit and a refrigerator, which solves the technical problem that the refrigeration equipment cannot work normally due to the large voltage fluctuation range of the existing refrigerators in Asia, Africa and Latin America.

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