Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator

A non-isolated, main control board technology, applied in the field of power supply, can solve the problems of restricting the use of non-isolated power supply, unstable safety and reliability, complex peripheral units, etc., and achieve the effect of simple structure, low cost and high reliability

Inactive Publication Date: 2014-10-15
HEFEI MIDEA REFRIGERATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the load power of the existing technical solutions is mostly relatively small, such as below 5W, and the peripheral units are relatively complex, and the safety and reliability are unstable, thus limiting the use of non-isolated power supplies

Method used

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  • Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator
  • Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator
  • Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator

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Embodiment Construction

[0034] According to the first aspect of the present invention, the non-isolated power supply includes: a rectifying unit for converting input alternating current into direct current; an input filtering unit for filtering direct current received from the rectifying unit; a converter unit including a DC / DC A converter; a power supply and voltage stabilizing unit for providing a stable voltage to the converter unit; a freewheeling unit for maintaining continuous output of current when the switching element in the DC / DC converter is disconnected; and a feedback unit , which can provide a feedback signal about the output voltage to the converter unit to control the switching on and off of the switching element, wherein the output terminal of the input filtering unit is connected to the converter unit, the continued The input end of the flow unit is connected to the converter unit, the output end of the freewheeling unit is connected to the input end of the feedback unit, and the out...

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PUM

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Abstract

The invention provides a non-isolated power supply for a refrigerator main control panel. The non-isolated power supply comprises a rectification unit for converting an input alternating current to a direct current, an input filter unit for filtering the direct current received from the rectification unit, a converter unit comprising a DC / DC converter, a power supply and voltage stabilization unit for providing a stable voltage for the converter unit, a follow current unit for keeping the output continuing of the current when a switch component in the DC / DC converter is switched off, and a feedback unit capable of providing a feedback signal about an output voltage for the converter unit so as to control the switch-on and switch-off of the switch component, wherein the output end of the input filter unit is connected with the converter unit, the input end of the follow current unit is connected with the converter unit, the output end of the follow current unit is connected with the input end of the feedback unit, the output end of the feedback unit is connected with the converter unit, the power supply and voltage stabilization unit is connected with the converter unit, and the output end of the follow current unit is the output end of the non-isolated power supply. The invention further provides a refrigerator main control panel and a refrigerator.

Description

technical field [0001] The invention relates to the technical field of power supplies, and more specifically, relates to a non-isolated power supply for a main control board of a refrigerator, a main control board and a refrigerator with the non-isolated power supply. Background technique [0002] The main control board is a key component in refrigerators and other household appliances. It implements the main functions of household appliances such as refrigerators, and the power supply in the main control board supplies power to the main control board. [0003] Currently, non-isolated power has been used in the main control board. A non-isolated power supply means that there is no electrical isolation between the input end and the load end through a transformer, but a direct connection, and the input end and the load end share a common ground. [0004] There have been some developments in the application of DC-DC non-isolated power solutions in the prior art, and the most u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156F25D29/00
Inventor 李若兰王剑钱振万江李勇
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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