Dustproof device, optical module, communication single board and communication equipment

The embodiment of the utility model provides a dustproof device, an optical module, a communication single board and communication equipment, the dustproof device can be used for realizing dustproof effects of an optical module level and a communication single board level, the dustproof device comprises a shell, the shell is internally provided with a dustproof channel, and the dustproof channel is communicated with an air inlet and an air outlet in the shell. Air is discharged through the air inlet, the dustproof channel and the air outlet and then enters the optical module or the communication single board, and dust, salt mist and the like can be deposited and filtered in the dustproof channel, so that dust entering the communication single board or the optical module is reduced or prevented, and dust prevention and corrosion prevention of the communication single board or the optical module are realized. The dustproof channel is a bent channel, the inner wall of the dustproof channel is provided with the protruding baffles, and the baffles are matched with the bent dustproof channel so that the spreading path of air in the channel can be prolonged, the contact area with dust and the like can be increased, and the dust and the like can be better deposited in the dustproof channel. The dust is further reduced or prevented from entering the optical module or the communication single board, and the dustproof effect is improved.