Switching circuit of PFC converter, converter and electrical equipment

The utility model relates to the technical field of AC-DC-AC frequency conversion, in particular to a switching circuit of a PFC converter, a converter and electrical equipment, in a normal state, a controller can control a third switch tube to be closed and a first switch tube, a second switch tube and a fourth switch tube to be disconnected to form a bridged FPC interlaced circuit; when a target rectification branch of the rectification unit is in a fault state, the controller can control the third switch tube to be switched off and the fourth switch tube and the first switch tube or the second switch tube connected to the same power supply interface with the input end of the target rectification branch to be switched on to form a bridgeless PFC interlaced circuit, so that the electrical equipment can operate normally, and the safety of the electrical equipment is improved. And the user can use conveniently. 本实用新型涉及交直交变频技术领域，具体涉及一种PFC变换器的切换电路、变换器和电器设备，正常状态下控制器可以控制第三开关管闭合，第一开关管、第二开关管和第四开关管断开，构成有桥FPC交错电路；当整流单