CN2892496Y - Dustless blackboard - Google Patents
Dustless blackboard Download PDFInfo
- Publication number
- CN2892496Y CN2892496Y CN 200620019483 CN200620019483U CN2892496Y CN 2892496 Y CN2892496 Y CN 2892496Y CN 200620019483 CN200620019483 CN 200620019483 CN 200620019483 U CN200620019483 U CN 200620019483U CN 2892496 Y CN2892496 Y CN 2892496Y
- Authority
- CN
- China
- Prior art keywords
- dust
- blackboard
- behind
- utility
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model is one kind of dust-free blackboard. Behind the blackboard surface (1) is installed a vacuum cleaner, which is a sealed cavity; within the sealed cavity is installed a low-noise draught fan (2) and behind the fan is a filter net (3); on the blackboard surface are a number of tiny holes distributed evenly and at the bottom of the blackboard is a dust box (4). Due to reasonable diameter and distribution of the holes on blackboard surface of the utility mode, the dusty air is inhaled into the cavity behind the blackboard through the draught fan; once the dust enters the cavity, the space expansion makes the velocity of air flow sharply decrease and most of the dust fall into the box under its own gravity while a small number is blocked by the filter net and attached to the net; when the fan stops working, these dust will fall into the dust box. The utility model can completely wipe out the dust of writing and erasing without any effect on writing and vision.
Description
Technical field
The utility model relates to teaching aid, specifically a kind of no dust blackboard.
Background technology
Traditional blackboard generally only is made of a plate face, can produce a large amount of dust when writing or erase the board, contaminated environment not only, and Faculty and Students can suck dust simultaneously, and are unfavorable to health.In order to improve this situation, there is the blackboard of many improvement to be invented, as blank, dust-free blackboard, multi-functional dust-free blackboard, wet rubbing electrothermal blackboard is exempted from erasing dust-free blackboard, electric dust-less blackboard, inferior light polyethylene dust-free blackboard, netted dust-free blackboard, the narrow slit type dust-free blackboard, automatic lifting exempts to wipe husband's dirt blackboard or the like, above-described blackboard, defective such as have or cost height or complex structure or operating noise be big, great majority only carry out dedusting at erasing the board to dust, and have dust problem when writing equally.Wherein application number is that 200410075436.3 patent application discloses a kind of dust-free blackboard, and it is evenly to be provided with the highdensity latticed hexagon pore that waits on the plate face, and the pore length of side is between 0.2-2mm, and pore is 20-1000/cm in the plate surface density
2Air-introduced machine has also been used in this invention, but the use of blower fan is when erasing the board, and only to the wiping board dedusting, and the pollution of dust still exists when writing, in addition, micropore on the blackboard surface is too little, and the one, make difficulty, the 2nd, easy obstruction, moreover the dust bag of air outlet place dress can cause resistance to blower fan, and the dust that stays when being difficult to make blower fan with wiping board is thoroughly extracted out.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and providing a kind of can carry out thorough absorbing and filtering to dust when writing with wiping board, and simple in structure, the no dust blackboard that cost is low, easy to use.
The technical solution of the utility model is: this nothing dust blackboard, comprise blackboard surface, it is characterized in that being provided with dust exhaust apparatus in the back of blackboard surface, this dust exhaust apparatus is a seal chamber, the low noise air-introduced machine is installed in the seal chamber, be provided with filter screen behind the air-introduced machine, several micropores that is evenly distributed are arranged on the blackboard surface, one dust box is arranged at the lower curtate of blackboard.
No dust blackboard of the present utility model is because the pore size on the reasonable Arrangement blackboard surface and the distribution in hole, under the effect of air-introduced machine, the air that the blackboard surface contains dust is inhaled in the dust chamber behind the blackboard, dust is once enter cavity, because of space enlargement, anxious poly-decline of air velocity, major part falls in the dust box under the self gravitation effect of dust, small part is blocked by air filter screen and is adsorbed on it, when blower fan quits work, these dust can fall in the dust box, and air filter screen can be pulled down dedusting, and the dust box can be pulled down cleaning.The utility model not to write impact with vision in, can thoroughly remove the dust when writing with wiping board.
Description of drawings
Fig. 1 is the structural representation of no dust blackboard of the present utility model.
Among the figure, 1-blackboard surface, 2-low noise blower fan, 3-air filter screen, 4-dust box.
The specific embodiment
As shown in the figure, no dust blackboard of the present utility model is to be provided with dust exhaust apparatus in the back of blackboard surface 1, this dust exhaust apparatus is a seal chamber, low noise air-introduced machine 2 is installed in the seal chamber, be provided with filter screen 3 behind the air-introduced machine, several micropores that is evenly distributed are arranged on the blackboard surface, and micropore size is the 2-3 millimeter, at the lower curtate of blackboard one dust box 4 is arranged.
Claims (2)
1, a kind of no dust blackboard, comprise blackboard surface, it is characterized in that being provided with dust exhaust apparatus in the back of blackboard surface (1), this dust exhaust apparatus is a seal chamber, low noise air-introduced machine (2) is installed in the seal chamber, be provided with filter screen (3) behind the air-introduced machine, several micropores that is evenly distributed are arranged on the blackboard surface, one dust box (4) is arranged at the lower curtate of blackboard.
2, no dust blackboard according to claim 1 is characterized in that the micropore size that is evenly distributed on the blackboard surface is the 2-3 millimeter, and the blackboard back side to air-introduced machine delivery outlet seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019483 CN2892496Y (en) | 2006-04-28 | 2006-04-28 | Dustless blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019483 CN2892496Y (en) | 2006-04-28 | 2006-04-28 | Dustless blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2892496Y true CN2892496Y (en) | 2007-04-25 |
Family
ID=38060662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620019483 Expired - Fee Related CN2892496Y (en) | 2006-04-28 | 2006-04-28 | Dustless blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2892496Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
-
2006
- 2006-04-28 CN CN 200620019483 patent/CN2892496Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |