Double-conversion type UPS (Uninterrupted Power Supply)

The utility model provides a double-conversion type UPS (Uninterrupted Power Supply), and belongs to the technical field of UPSs. The double-conversion type UPS power supply comprises a power supply main body, a filtering assembly and a fixing assembly. The power supply main body comprises a box body and a battery pack, the filter assembly comprises a mounting frame, a screw rod and a fan, the second filter screen is in threaded sleeve connection with the outer wall of the screw rod, and the fixing assembly comprises a first button rod, a fixing block and a second button rod. One end of the second spring is fixedly connected to the outer wall of the first button rod and the outer wall of the second button rod in a sleeving mode. According to the device, two second filter screens can be matched for use, so that when one second filter screen is cleaned, the other second filter screen can play a role in filtering, meanwhile, through the arrangement of a first button rod and a second button rod, a mounting frame