| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that loss of circuit occurs caused by voltage drop elements or the like when DC loads operated by a plurality of different voltages are operated in a refrigerator, in particular, the loss of circuit is large when the DC load used at variable voltages such as a DC fan motor used for a blower, and the other DC load are used.SOLUTION: A refrigerator 1 includes a control microcomputer 26 and a DC fan motor 30 that are DC loads, and includes a variable DC power supply circuit 40 outputting operating voltage of the DC fan motor 30, and a fixed power supply circuit 24 outputting fixed voltage not higher than variable output voltage based on output voltage of the variable DC power supply circuit 40, and the control microcomputer 26 is operated by output voltage of the fixed power supply circuit 24. Therefore, the circuit loss is reduced to achieve low power consumption, and a circuit can be simplified. |
