| 摘要 |
PROBLEM TO BE SOLVED: To provide a common power supply unit for realizing reduction in size of the apparatus shape, reduction in the number of wirings and simplified assembling process, through reduction of the loading space and an apparatus loading the same unit. SOLUTION: This common power supply unit comprises a transformer 11 which includes primary windings 11a, 11b and a secondary winding 11c, a switching circuit for converting a DC voltage to an AC voltage using the primary winding 11a as a structural element, and first and the second rectifying circuits for rectifying the voltage generated in the secondary winding 11c, thereby outputting the voltage rectified with the first rectifying circuit as the operation voltage for an electrical dust collector 3 and also outputting the voltage rectified with the second rectifying circuit as the operation voltage for an negative-ion generator 5.
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