A blackboard dust automatic collection device

Abstract

The invention discloses anautomatic blackboard dust collection device, which comprises a box, wherein the box is arranged below a blackboard; an upper panel of the box is provided with a through hole for dust to passthrough; at least two fans are fixedly arranged below the upper panel; a dust guide plate is arranged below the fans; and one end of the dust guide plate is provided with a dust collection box. The upper body structure of the device consists of three parts, i.e., silent fans, a supporting frame and a wind direction plate; the silent fans blow downwards to form an air curtain; the silent fans and the wind direction plate are supported by the supporting frame; the dust moves downwards close to the blackboard through the wind direction plate; and the lower body structure of the device comprises a dust collection device, an air guide plate, the dust guide plate, the dust collection box, the upper panel and a box. The box is used for fixing all lower body structural components, and placing a photoelectric switch and a circuit board in a control system. The device is only required to be arranged on upper and lower wall bodies of the blackboard, the blackboard is not required to be modified, the device is simple and convenient, and the cost is saved.

Description

technical field [0001] The invention relates to teaching tools, in particular to a blackboard dust automatic collection device. Background technique [0002] Show according to statistics: my country's teachers and students inhale about 200 grams of chalk dust every year because of going to class, and about 20% / year suffer from respiratory tract and lung diseases. Some teaching equipment, such as multimedia workbenches, precision experimental instruments, etc., will also greatly reduce their service life due to dust pollution. Blackboard dust has become a major hazard of teaching environment pollution. [0003] Although multimedia teaching equipment has been widely used now, many subjects still need to write a lot of writing on the blackboard, such as the derivation process of mathematics, physics, and chemical formulas. Existing traditional blackboards on the market cannot effectively collect chalk dust, and cannot control the chalk dust from drifting away. According to r...

AI Technical Summary

Problems solved by technology

The existing traditional blackboards on the market cannot effectively collect chalk dust and cannot control the scattering of chalk dust

According to research, the dust collection devices currently on the market only collect part of the dust, and only collect the dust generated when wiping the blackboard without considering the problem of dust flying around when writing chalk

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