Centrifugal chalk-collection double-bucket dust-catching blackboard eraser

Abstract

The invention relates to a centrifugal chalk-collection double-bucket dust-catching blackboard eraser which comprises a motor arranged in a casing and a fan blade driven by the motor, a motor casing is provided with an air inlet, an air cavity and an air outlet, the air inlet is provided with a chalk suction pipe which is connected with a blackboard eraser, the blackboard eraser is internally provided with a chalk suction hole, a chalk storage bucket is connected below the motor casing, and the chalk storage bucket is internally provided with a chalk filtering device. The centrifugal chalk-collection double-bucket dust-catching blackboard eraser is characterized in that the chalk storage bucket comprises a cylindrical chalk bucket chamber 1 and a cylindrical chalk bucket chamber 2, the cylindrical chalk bucket chamber 1 is internally provided with a primary chalk filtering tank, the wall of the primary chalk filtering tank is provided with chalk filtering holes, the primary chalk filtering tank is connected with the motor casing, the air inlet of the casing is communicated with the cylindrical chalk bucket chamber 1, a lower opening of the primary chalk filtering tank is contacted with a lug boss at the bottom of the cylindrical chalk bucket chamber 1, an upper opening of the primary chalk filtering tank is communicated with the cylindrical chalk bucket chamber 2, the cylindrical chalk bucket chamber 2 is internally provided with a secondary chalk filtering tank, the wall of the secondary chalk filtering tank is provided with an air pumping hole, and the upper opening of the secondary chalk filtering tank is communicated with the air outlet.

Description

technical field [0001] The invention relates to a board wiper for wiping chalk characters on a blackboard, in particular to a centrifugal powder-collecting double-barrel dust-absorbing board wiper, which belongs to teaching tools. Background technique [0002] Teacher (teacher) writes on blackboard with chalk, and wiping chalk writing with blackboard can cause dust to fly, and the one, pollute indoor environment; Therefore, people have developed the dust-absorbing board wiper, and the basic feature of the dust-absorbing board wiper is that the suction fan driven by the motor and the pipe are passed to the blackboard to wipe, and the pen powder on the blackboard is sucked into the machine and filtered, and then discharged. Air, the filter device of the existing board wiper is a filter screen, and its disadvantages are: the one, the dust particles are small, and the filter screen will produce "powder leakage", so the discharged air still contains pen powder; Pen powder needs ...

AI Technical Summary

Problems solved by technology

[0002] Teachers (teachers) use chalk to write on the blackboard, and wipe the chalk with the blackboard to cause dust to fly. One is to pollute the indoor environment; the other is to inhale it into the body and endanger human health.

Therefore, people have developed the dust-absorbing board wiper, and the basic feature of the dust-absorbing board wiper is that the suction fan driven by the motor and the pipe are passed to the blackboard to wipe, and the pen powder on the blackboard is sucked into the machine and filtered, and then discharged. Air, the filter device of the existing board wiper is a filter screen, and its disadvantages are: the one, the dust particles are small, and the filter screen will produce "powder leakage", so the discharged air still contains pen powder; Pen powder needs to pass through the filter screen, the filter capacity is large, the powder will stick to the filter screen, block the filter screen holes, and reduce the filtration capacity

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