CN2074714U

CN2074714U - Dust suction blackboard eraser

Info

Publication number: CN2074714U
Application number: CN 90217510
Authority: CN
Inventors: 潘月映
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-02
Filing date: 1990-08-02
Publication date: 1991-04-10

Abstract

The utility model discloses an improved dust suction blackboard eraser, which comprises an electric fan, a dust storing box, a brush with grooves and a moist type dust filter, wherein, the grooves are in the radial arrangement and use a dust suction mouth as the center. The dust suction blackboard eraser can effectively suck and collect chalk dust generated when a blackboard is erased, and the dust collection rate is higher.

Description

Dust suction blackboard eraser

The utility model relates to a kind of dust-absorbing blackboard brush, and the scrubbing brush of with groove is housed on it, and there is suction port in scrubbing brush central authorities, establishes an electric fan that can produce low pressure in the suction port place, and there is dust storage box on the fan side.

Produce a large amount of dust during blackboard wiping and can cause air pollution.For addressing this problem, a lot of dust-absorbing blackboard brush have appearred.Chinese patent application CN85201107.U proposes a kind of electric dust absorption blackboard brush, and it has electric fan, the scrubbing brush of with groove, dust storage box.During blackboard wiping, allow electric fan work, form low pressure, suck and have the air of dust, and allow under dust deposits in dust storage box at the suction port of scrubbing brush central authorities.But this electric dust absorption blackboard brush only considers to suck dust, and ignore in the air that blackboard brush discharges and still have a large amount of dust, again because the design of scrubbing brush groove is unreasonable, the dust that has a large amount of wipings to get off can not in time suck, so its dust collection rate is lower, a large amount of dust still fly upward in air.

Task of the present utility model is to propose a kind of improved electric dust absorption blackboard brush, improves the dust collection rate of blackboard wiping.

Task of the present utility model is finished with following scheme: the groove of scrubbing brush is that the center is radial arrangement with the suction port, and there is dirt catcher the gas outlet of dust storage box, and interior installing can be received the filter screen of moisture content.

The periphery of scrubbing brush is the front of wiping, and the dust of generation is maximum.Suck the dust at scrubbing brush periphery place in time, significant to improving the dust collection rate.It is that the center is radial arrangement that the trench design of scrubbing brush becomes with the suction port, makes the scrubbing brush periphery also directly be subjected to the effect of center low pressure, and the dust under the scrubbing brush periphery is wiped can be inhaled into and unlikely being scattered in the air immediately.

There is dirt catcher the gas outlet of dust storage box, in establish the filter screen that can receive moisture content.This filter screen can receive a certain amount of moisture content, makes dirt catcher and dust storage box keep moistening.The dust laden air that sucks touches moistening dust storage box, and its dust is easy on the inwall attached to dust storage box, and importantly can not kick up again because of flowing of air.Remaining air only contains low amounts of dust, discharges through behind the moistening strainer filtering again.The air of discharging can be cleaner, is substantially free of dust.

Advantage of the present utility model is to suck more dust and discharges still less dust, is brushed with higher dust collection rate than existing electric dust absorption blackboard.

Be described in further detail below with reference to accompanying drawing.

Fig. 1 is the front view of the with groove scrubbing brush of a kind of embodiment of the utility model.

Fig. 2 is the profile of a kind of concrete structure of the utility model.

With reference to Fig. 1, there is suction port (15) in the central authorities of dull and stereotyped (12), and strip brush (14) is that the center is radial arrangement with the suction port, and the groove that forms between the strip brush (13) also is that the center is radial arrangement with the suction port.The material of strip brush can be sponge, foamed plastics, felt, cotton felt etc.

The scrubbing brush of a with groove preferably independent exchangeable part is contained on the blackboard brush.

With reference to Fig. 2, the scrubbing brush of with groove (3) is an interchangeable part, is fixed on the bottom surface of shell (1) in the mode of inserting.The scrubbing brush suction port is over against electric fan.This example adopts miniature cocurrent electromotor (9) to drive a centrifugal fan (2), is formed centrally a low pressure in centrifugal fan.During blackboard wiping, dust is inhaled under the effect of low pressure, and dust at first enters deposition in the dust storage box (4), and the filtration that remaining band dirt air passes through dirt catcher filter screen (7) is again discharged again.Filter screen requires to receive moisture content can breathe freely again, still can breathe freely effectively under moisture state, plays a role in filtering.This filter screen can be made with materials such as foamed plastics or sponges.This routine filter screen is seized on both sides by the arms by support (6), can extract out easily and insert.After filter screen is extracted out, through soaking and cleaning to insert in the filter again and use.It is moistening that filter screen (7) keeps, and wherein partly water seepage flow makes dust storage box also keep moisture state to dust storage box.Dust storage box has a lid (5), and uncap can be removed dust stratification.

Miniature cocurrent electromotor can be a power supply with dry cell, and dry cell (11) is contained in the interior battery case of blackboard brush.Power switch keys available formula.Have and like with external power supply, also can join the insertion mouth of an external power supply.

Claims

A kind of dust-absorbing blackboard brush, the scrubbing brush of with groove is housed on it, there is suction port in scrubbing brush central authorities, establish an electric fan that can produce low pressure in the suction port place, there is dust storage box on the fan side, the groove that it is characterized in that described scrubbing brush is that the center is radial arrangement with the suction port, and there is dirt catcher the gas outlet of dust storage box, in establish the filter screen that can receive moisture content.