BACK-UP POWER SOURCE APPARATUS IN INDOOR UNIT, CONTROLLING METHOD THEREOF AND MULTI-SPLIT AIR CONDITIONING SYSTEM
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United States of America Patent
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Mar 16, 2015
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Dec 9, 2014
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Abstract
A back-up power source apparatus in an indoor unit of a multi-split air conditioning system includes first and second voltage detecting circuits and a control circuit connected with the first and second voltage detecting circuits. The first and second voltage detecting circuits detect voltages of first and second power sources on a mainboard of the indoor unit in real time respectively, and the control circuit controls the back-up power source apparatus to enter a corresponding operation state according to the voltages of the first and/or second power sources. A controlling method of the back-up power source apparatus and a multi-split air conditioning system including the back-up power source apparatus are also provided.
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