CN2084009U - Corona dusting blackboard - Google Patents
Corona dusting blackboard Download PDFInfo
- Publication number
- CN2084009U CN2084009U CN 90225484 CN90225484U CN2084009U CN 2084009 U CN2084009 U CN 2084009U CN 90225484 CN90225484 CN 90225484 CN 90225484 U CN90225484 U CN 90225484U CN 2084009 U CN2084009 U CN 2084009U
- Authority
- CN
- China
- Prior art keywords
- blackboard
- corona
- dust
- high voltage
- dusting
- 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.)
- Withdrawn
Links
Abstract
The utility model relates to a corona dusting blackboard for teaching. The back side of a blackboard (1) is provided with a layer of high voltage insulating material (3) and an anode plate (2) connected with a high voltage electrostatic generator (5). The front side of the blackboard is provided with electrified bodies (4) which can create a corona phenomenon and are connected with the negative pole of the high voltage electrostatic generator in series at intervals at surrounding directions. The utility model enables chalk dust with charges to tend and paste onto an anodic blackboard surface to discharge. The chalk dust can be deposited by the action of a board wiper. Thus, the purpose of no chalk dust flying is obtained. Existing dust in air can also be absorbed onto the blackboard. The corona dusting blackboard is good for environmental sanitation. At the same time, charts can be directly stuck on the blackboard.
Description
The utility model relates to a kind of corona dust-absorbing blackboard that is used to impart knowledge to students.
The blackboard that is used to impart knowledge to students, higher have frosted glass or an Enamelled blackboard.Chalk powder flies upward everywhere when erasing the board, and needs the long period just can land; Do not wait and land, continue by the new generation powder that erases the board continuously and fly upward, the person is operated among the harmful powder with being subjected to the class to make the teacher, and the infringement health also is unfavorable for environmental sanitation.The use dust-free chalk and the dust absorption blackboard eraser that have, but effect is all undesirable.
The purpose of this utility model is to overcome shortcoming part of the prior art, and a kind of corona dust-absorbing blackboard is provided, and reaching does not have the purpose of flying upward dust.
The utility model makes the powder grit electronegative according to the electrostatic precipitation principle by the corona discharge under the high pressure, and trend is affixed on the blackboard surface of positive plate and discharge depositing.It is to reach by the following technical programs: put positive plate and one deck High-Voltage Insulation thing that joins with the HV generator positive pole at the back side of blackboard, the front of blackboard is provided with in peripheral direction and produces the electrical body that corona phenomenon and HV generator negative pole are connected at interval.Wherein: positive plate can adopt tinfoil paper to make; The point discharge body is arranged on the electrical body, point to blackboard, 10 to 30cm distance is arranged, at interval 5cm with blackboard; Blackboard is the frosted glass blackboard.
The utility model compared with prior art has following effect:
1) discharge owing to the electronegative trend of chalk powder is affixed on the blackboard surface of anode, under the effect deposit of blackboard eraser, reaching does not have the purpose of flying upward chalk powder.
2) original dust also will be adsorbed on the blackboard in the air, help environmental sanitation.
3) can directly paste wall chart on the blackboard.
To be described in further detail the utility model below in conjunction with accompanying drawing:
Accompanying drawing is a corona dust-absorbing blackboard schematic diagram.
Shown in accompanying drawing, existing blackboard for education mostly is the frosted glass blackboard, put positive plate 2 and one deck High-Voltage Insulation thing 3 that one deck and HV generator 5 positive poles join at frosted glass blackboard 1 back side, the front of blackboard 1 is provided with in peripheral direction and produces the electrical body 4 that corona phenomenon and HV generator 5 negative poles are connected at interval.Above-mentioned positive plate can adopt tinfoil paper or tinfoil paper net to make to be close to the blackboard back side; The High-Voltage Insulation thing adopts 1cm heavy insulation plate to be pressed in and forms one on the positive plate; Electrical body is the point discharge body, points to blackboard, with blackboard 10 to 30cm distance is arranged, and the electrical body spacing is 5cm; Blackboard adopts the thick frosted glass blackboard of 5mm.
HV generator 5 can produce with modes such as diode multiplication of voltages, and 20KV is to 30KV in voltage output, and power arrives 60W at 20W; Discharge electrode must be placed with insulating materials, and mixes overcurrent protective device in electrostatic generator inside, in case electric shock.
Claims (4)
1, a kind of corona dust-absorbing blackboard that is used to impart knowledge to students, it is characterized in that: put positive plate (2) and one deck High-Voltage Insulation thing (3) that one deck and HV generator (5) positive pole join at the back side of blackboard (1), the front of blackboard is provided with the electrical body (4) of connecting at interval with HV generator (5) negative pole that produces corona phenomenon in peripheral direction.
2, corona dust-absorbing blackboard as claimed in claim 1 is characterized in that: positive plate can adopt tinfoil paper or tinfoil paper net to make.
3, corona dust-absorbing blackboard as claimed in claim 1 is characterized in that: electrical body has the point discharge body on (4), points to blackboard, with blackboard the distance of 10cm to 30cm, 5cm is at interval arranged.
4, corona dust-absorbing blackboard as claimed in claim 1 is characterized in that: blackboard is the frosted glass blackboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225484 CN2084009U (en) | 1990-11-30 | 1990-11-30 | Corona dusting blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225484 CN2084009U (en) | 1990-11-30 | 1990-11-30 | Corona dusting blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2084009U true CN2084009U (en) | 1991-09-04 |
Family
ID=4902910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90225484 Withdrawn CN2084009U (en) | 1990-11-30 | 1990-11-30 | Corona dusting blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2084009U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095430C (en) * | 1999-02-12 | 2002-12-04 | 谌志华 | Electrostatic adsorption posting writing board |
| CN108097460A (en) * | 2017-12-15 | 2018-06-01 | 安徽工业大学 | A kind of plasma dust charged and electrostatic precipitation one brush device |
| CN108466509A (en) * | 2016-11-16 | 2018-08-31 | 陈伟民 | A kind of blackboard eraser |
-
1990
- 1990-11-30 CN CN 90225484 patent/CN2084009U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095430C (en) * | 1999-02-12 | 2002-12-04 | 谌志华 | Electrostatic adsorption posting writing board |
| CN108466509A (en) * | 2016-11-16 | 2018-08-31 | 陈伟民 | A kind of blackboard eraser |
| CN108097460A (en) * | 2017-12-15 | 2018-06-01 | 安徽工业大学 | A kind of plasma dust charged and electrostatic precipitation one brush device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0084572A1 (en) | Electrostatic air cleaner | |
| CN108944199A (en) | Electrostatic dedusting eraser | |
| CN111330889A (en) | Traffic signal lamp is with automatically cleaning type photovoltaic board | |
| CN204605329U (en) | Electrostatic dedusting blackboard eraser | |
| CN203381404U (en) | Novel blackboard eraser with electrostatic dust removal function | |
| CN2084009U (en) | Corona dusting blackboard | |
| CN202862950U (en) | Electrostatic dust absorbing eraser | |
| CN110103617A (en) | A kind of electrostatic dedusting blackboard eraser that can be recovered energy | |
| CN201437306U (en) | Electrostatic dust protection device | |
| USRE34346E (en) | Ionizer | |
| JPS56154772A (en) | Transferring apparatus | |
| CN205649207U (en) | Outdoor teaching show shelf of solar energy | |
| CN2057147U (en) | Electrostatic dust adsorption blackboard eraser | |
| CN210553842U (en) | Piezoelectric dust-absorbing blackboard eraser | |
| CN2496674Y (en) | Electrostatic blackboard eraser | |
| CN216184095U (en) | Dust-absorbing blackboard eraser | |
| CN2448581Y (en) | Electricity charging type electrostatic suction blackboard eraser | |
| CN202498888U (en) | Dustproof electrostatic blackboard | |
| CN2189002Y (en) | High voltage static electric field arrangement for dust removing | |
| CN206264647U (en) | A kind of electrostatic dust prevention chalk device | |
| CN2280013Y (en) | Static electricity blackboard eraser | |
| CN206718832U (en) | A kind of electrostatic dust prevention blackboard eraser | |
| CN204674255U (en) | Electrostatic dust-removing blackboard eraser | |
| RU218045U1 (en) | Device to prevent pollution and degradation of solar modules | |
| KR970078764A (en) | Portable static eliminator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |