Micro bubble generator in non-submerged state

The utility model discloses a micro-bubble generator in a non-submerged state, which relates to the technical field of micro-bubble generators and comprises a shell, a venturi inner core and a blocking net, a water inlet is arranged at one end of the shell, a water outlet is arranged at the other end of the shell, the venturi inner core is arranged in the shell, a plurality of venturi channels are arranged in the venturi inner core, and the blocking net is arranged on the venturi inner core. The water inlet end of each Venturi channel is communicated with the water inlet, the water outlet end of each Venturi channel is communicated with the water outlet, the flow area of each Venturi channel is gradually increased from the water inlet end to the water outlet end, the blocking net is arranged at the water outlet, and a buffer cavity is formed among the blocking net, the water outlet end and the shell. The cavitation effect can be improved in a non-immersion state, a large number of microbubbles are contained i