Killing device used for dissolved air releaser to prevent and control biofouling of limnoperna fortunei

The utility model discloses a killing device for a dissolved air releaser to prevent and control biofouling of macrobrachium nipponensis, which comprises a dissolved air water branch pipe provided with the dissolved air releaser, and the dissolved air water branch pipe is provided with an ultrasonic fixing frame positioned above the dissolved air releaser. The ultrasonic fixing frame is provided with at least one ultrasonic transducer for generating mechanical vibration energy towards the dissolved air releaser, and the ultrasonic transducer is electrically connected with an ultrasonic generator with an automatic opening and closing function through a power supply cable. According to the device, mussel larvae and juvenile mollusks attached to the surface of the dissolved air releaser are killed in a manner of regularly and automatically starting ultrasonic waves, so that the aim of preventing the dissolved air releaser from being stained and blocked by mussel organisms in a tap water air flotation process is