CN112428729A - Blackboard eraser based on electrostatic adsorption and control system thereof - Google Patents
Blackboard eraser based on electrostatic adsorption and control system thereof Download PDFInfo
- Publication number
- CN112428729A CN112428729A CN202011456719.8A CN202011456719A CN112428729A CN 112428729 A CN112428729 A CN 112428729A CN 202011456719 A CN202011456719 A CN 202011456719A CN 112428729 A CN112428729 A CN 112428729A
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- electrostatic adsorption
- dust
- plate
- ionization
- hollow cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B6/00—Cleaning by electrostatic means
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Abstract
The invention discloses a blackboard eraser based on electrostatic adsorption and a control system thereof, wherein the blackboard eraser comprises: a hollow cavity is arranged in the middle of the shell; the middle of the lower surface of the shell is provided with bristles; the top plate is arranged on the upper surface of the shell; a push switch is arranged on one side surface of the shell; dust suction ports are formed in the periphery of the mounting seat; a first filter screen is arranged between the electrostatic adsorption device and the air draft device; a dust collecting box is arranged below the hollow cavity; the ionization device ionizes the sucked dust, and then the dust with static electricity is adsorbed by a positive plate and a negative plate of the electrostatic adsorption device; the front surface of the top plate is provided with a plurality of vent holes for air flow to pass through side by side. The centrifugal fan is arranged to exhaust air to the hollow cavity body, so that negative pressure is formed, and dust enters from the dust suction port; after the ionization device ionizes the sucked dust, the dust with static electricity is adsorbed by the positive plate and the negative plate of the electrostatic adsorption device, and the dust falls into the dust collection box through the filter screen after falling off after the power failure of the electrostatic adsorption device.
Description
Technical Field
The invention belongs to the technical field of teaching equipment, and particularly relates to a blackboard eraser based on electrostatic adsorption and a control system thereof.
Background
Chalks are widely used as teaching tools and are generally used for writing on blackboards. At present, the chalk used in China mainly comprises two types, namely common chalk and dust-free chalk, and the main components of the chalk are calcium carbonate (limestone) and calcium sulfate (gypsum) or contain a small amount of calcium oxide. At present, in the components of the chalk on the market, except the low content of metal elements such as lead, manganese, barium and the like, the content of metal cadmium is high, the cadmium is absorbed by human bodies and is mainly stored in liver, kidney and bone tissues, the damage to the tissues is obvious, and the main pathological changes caused by long-term contact of the cadmium compounds are emphysema and kidney damage. The disease condition is progressive, and the symptoms of weakness, emaciation, dizziness, insomnia, dreaminess, anorexia and neurasthenia are presented in early stage, and nosebleed, chronic pharyngitis, atrophy and ulcer of nasal mucosa and the like are also shown. Emphysema progresses slowly, and patients have progressive dyspnea, increased activity, and palpitation. Cadmium is also one of the most cancer-causing metal elements. Although chalk dust is harmless to human bodies, millions of teachers in China need to use chalk for writing on blackboard everyday, and people live in the chalk dust after wiping the blackboard everyday, so that discomfort of the nose, the throat and the throat can be caused.
Writing on blackboard with chalk is carried out by coating gypsum powder on blackboard. When the blackboard is wiped, the chalk dust flies in the air for a short time and then falls on the object surface and the ground near the blackboard. The particles are larger, more than 100 microns, heavier, faster to fall and short in floating time in the air. In the teaching process, the chalk dust is easily inhaled into the lung, most chalk dust is retained in the alveolus, the chalk dust enters the lung through the upper respiratory tract including the nose, the pharynx and the bronchus, in the process, part of dust is retained in the upper respiratory tract to generate mechanical stimulation and damage to mucosal epithelial cells, and the dry rhinitis and the hypertrophic rhinitis are easily induced after long-term work in the environment; the influence on the pharynx is mainly the induction of chronic bronchitis, sometimes asthma, and possibly the canceration of the nasopharynx, bronchi, and the like. Once the chalk dust falls into eyes, lacrimal gland secretion is stimulated, and tears hydrolyze calcium carbonate in the chalk dust to generate alkaline substances, so that mucous membranes of eyes are stimulated in the eyes to cause mucous membrane injury and form chronic inflammation; to solve the problem, a blackboard eraser based on electrostatic adsorption and a control system thereof are designed.
Disclosure of Invention
The invention aims to provide a blackboard eraser based on electrostatic adsorption and a control system thereof, wherein a centrifugal fan is arranged to exhaust air of a hollow cavity to form negative pressure, so that dust enters from a dust suction port; after the ionization device ionizes the sucked dust, the dust with static electricity is adsorbed by a positive plate and a negative plate of the electrostatic adsorption device, and the dust falls into the dust collection box through the filter screen after the electrostatic adsorption device is powered off; thereby preventing dust from flying in disorder, reducing the content of chalk dust in the air, beautifying the teaching environment and reducing the environmental pollution.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a blackboard eraser based on electrostatic adsorption, which comprises a shell, wherein a hollow cavity is arranged in the middle of the shell; the middle of the lower surface of the shell is provided with a mounting seat; the upper surface of the shell is provided with a top plate; a push switch is arranged on one side surface of the shell; the periphery of the mounting seat is provided with an annular dust suction port; the dust suction port is communicated with the hollow cavity; the front surface of the mounting seat is provided with bristles; an ionization device, an electrostatic adsorption device and an air exhaust device are sequentially arranged in the hollow cavity from front to back; a first filter screen is arranged between the electrostatic adsorption device and the air draft device; a battery bin for mounting a battery is arranged on one side of the shell; an installation groove is arranged below the hollow cavity; a dust collecting box is arranged in the mounting groove; a second filter screen is arranged between the mounting groove and the hollow cavity; the dust collecting box is arranged below the electrostatic adsorption device; the ionization device comprises a fixed bolt and a plurality of ionization plates; the ionization plates are arranged side by side; the ionization plate is fixed by the fixing bolt; two ends of the fixing bolt are fixed on the side surface of the hollow cavity; the ionization plate is electrically connected with the battery for supplying power; the electrostatic adsorption device comprises a fixed rod, a positive plate and a negative plate; the positive plates and the negative plates are arranged on the fixing rods in a staggered mode; two ends of the fixed rod are fixed on the side surface of the hollow cavity; the positive plate and the negative plate are electrically connected with the battery for supplying power; the ionization device ionizes dust entering from the dust suction port, and then the dust with static electricity is adsorbed by the positive plate and the negative plate of the electrostatic adsorption device; the front surface of the top plate is provided with a plurality of ventilation holes for air flow to pass through side by side.
Further, the outer surface of the shell is compounded with a layer of insulating material, and the insulating material comprises rubber or insulating plastic.
Furthermore, a plurality of supporting ribs are uniformly arranged in the channel for communicating the dust suction port with the hollow cavity.
Further, a cover plate for fixing the battery is arranged at the opening end of the battery compartment.
Furthermore, adjacent ionization plates are fixed through positioning clamping sleeves, and the positioning clamping sleeves are arranged on fixing bolts; and two ends of the fixing bolt are respectively engaged with a fixing nut used for limiting and fixing the ionization plate.
Furthermore, the adjacent positive plate and the adjacent negative plate are fixed through a positioning cutting sleeve, and the positioning cutting sleeve is arranged on the fixing rod; and two ends of the fixing rod are respectively meshed with a fixing nut used for limiting and fixing the positive plate and the negative plate.
Further, a centrifugal fan is arranged in the middle of the air draft device; the centrifugal fan performs air suction on the hollow cavity body to suck dust; the centrifugal fan is electrically connected with the battery for supplying power.
Furthermore, two sides of the upper surface of the shell are respectively provided with a clamping groove; two sides of one surface of the top plate are respectively provided with a buckle; the buckle is matched with the clamping groove to fix the top plate.
A control system of a blackboard eraser based on electrostatic adsorption comprises a push switch and an MCU; the push switch is electrically connected with the MCU; the MCU is electrically connected with the ionization device, the centrifugal fan and the electrostatic adsorption device respectively; the pressing switch transmits a switch signal to the MCU, and the MCU controls the ionization device, the centrifugal fan and the electrostatic adsorption device to be switched on and off according to the switch signal transmitted by the pressing switch.
The invention has the following beneficial effects:
the centrifugal fan is arranged to exhaust air to the hollow cavity body, so that negative pressure is formed, and dust enters from the dust suction port; after the ionization device ionizes the sucked dust, the dust with static electricity is adsorbed by a positive plate and a negative plate of the electrostatic adsorption device, and the dust falls into the dust collection box through the filter screen after the electrostatic adsorption device is powered off; thereby preventing dust from flying in disorder, reducing the content of chalk dust in the air, beautifying the teaching environment and reducing the environmental pollution.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic longitudinal cross-sectional view of an electrostatic adsorption-based blackboard eraser;
FIG. 2 is a schematic transverse cross-sectional view of an electrostatic attraction based blackboard eraser;
FIG. 3 is a front view of an electrostatic attraction based blackboard eraser;
fig. 4 is a system block diagram of a control system of an electrostatic adsorption-based blackboard eraser.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-3, the present invention is a blackboard eraser based on electrostatic adsorption, which includes a casing 1, wherein a layer of insulating material is compounded on the outer surface of the casing 1, and the insulating material includes rubber or insulating plastic; a hollow cavity 101 is arranged in the middle of the shell 1; the middle of the lower surface of the shell 1 is provided with a mounting seat 102; an annular dust suction opening 103 is formed in the periphery of the mounting seat 102; the dust suction port 103 is communicated with the hollow cavity 101; a plurality of supporting ribs 1031 are uniformly arranged in a channel for communicating the dust suction port 103 with the hollow cavity 101; the front surface of the mounting seat 102 is provided with bristles 2;
two sides of the upper surface of the shell 1 are respectively provided with a clamping groove 104; a top plate 7 is arranged on the upper surface of the shell 1; a plurality of ventilation holes 701 for air flow to pass through are arranged in parallel on the front surface of the top plate 7; two sides of one surface of the top plate 7 are respectively provided with a buckle 702; the buckle 702 is matched with the clamping groove 104 to fix the top plate 7; a push switch 108 is arranged on one side surface of the shell 1;
the ionization device 3, the electrostatic adsorption device 4 and the air exhaust device 6 are sequentially arranged in the hollow cavity 101 from front to back; a first filter screen 5 is arranged between the electrostatic adsorption device 4 and the air draft device 6; a centrifugal fan 601 is arranged in the middle of the air draft device 6; the centrifugal fan 601 performs air suction on the hollow cavity 101 to suck dust; the centrifugal fan 601 is electrically connected with the battery for power supply;
a battery bin 105 for installing a battery is arranged on one side of the shell 1; the open end of the battery compartment 105 is provided with a cover plate 106 for fixing the battery; an installation groove 107 is arranged below the hollow cavity 101; a dust collecting box 8 is arranged in the mounting groove 107; a second filter screen 9 is arranged between the mounting groove 107 and the hollow cavity 101; the dust collecting box 8 is arranged below the electrostatic adsorption device 4;
the ionization device 3 comprises a fixed bolt 301 and a plurality of ionization plates 302; a number of ionization plates 302 are arranged side by side; the ionization plate 302 is fixed by a fixing bolt 301; both ends of the fixing pin 301 are fixed on the side of the hollow cavity 101; the ionization plate 302 is electrically connected with the battery for power supply; adjacent ionization plates 302 are fixed through positioning clamping sleeves which are arranged on the fixing bolts 301; two ends of the fixing bolt 301 are respectively engaged with a fixing nut for limiting and fixing the ionization plate 302;
the electrostatic adsorption device 4 includes a fixing rod 401, a positive electrode plate 402, and a negative electrode plate 403; positive electrode plates 402 and negative electrode plates 403 are alternately provided on the fixing rod 401; both ends of the fixing rod 401 are fixed on the side of the hollow cavity 101; the positive plate 402 and the negative plate 403 are electrically connected to the battery for supplying power; the adjacent positive plate 402 and the negative plate 403 are fixed through a positioning cutting sleeve, and the positioning cutting sleeve is arranged on the fixing rod 401; two ends of the fixing rod 401 are respectively engaged with a fixing nut for limiting and fixing the positive plate 402 and the negative plate 403;
the ionization device 3 ionizes the dust entering from the dust suction port 103, and then adsorbs the dust charged with static electricity by the positive electrode plate 402 and the negative electrode plate 403 of the electrostatic adsorption device 4; after the electrostatic adsorption device 4 is powered off, the dust falls into the dust collection box 8 through the second filter screen 9.
As shown in fig. 4, a control system of a blackboard eraser based on electrostatic adsorption includes a push switch and an MCU; the push switch is electrically connected with the MCU; the MCU is electrically connected with the ionization device, the centrifugal fan and the electrostatic adsorption device respectively; the press switch transmits a switch signal to the MCU, and the MCU controls the ionization device, the centrifugal fan and the electrostatic adsorption device to be switched on and off according to the switch signal transmitted by the press switch.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The blackboard eraser based on electrostatic adsorption is characterized in that a hollow cavity (101) is arranged in the middle of the shell (1); a mounting seat (102) is arranged in the middle of the lower surface of the shell (1); a top plate (7) is arranged on the upper surface of the shell (1); a push switch (108) is arranged on one side surface of the shell (1);
an annular dust suction opening (103) is formed in the peripheral side of the mounting seat (102); the dust suction port (103) is communicated with the hollow cavity (101); the front surface of the mounting seat (102) is provided with bristles (2);
an ionization device (3), an electrostatic adsorption device (4) and an air draft device (6) are sequentially arranged in the hollow cavity (101) from front to back; a first filter screen (5) is arranged between the electrostatic adsorption device (4) and the air draft device (6);
a battery bin (105) for mounting a battery is arranged on one side of the shell (1); an installation groove (107) is arranged below the hollow cavity (101); a dust collecting box (8) is arranged in the mounting groove (107); a second filter screen (9) is arranged between the mounting groove (107) and the hollow cavity (101); the dust collection box (8) is arranged below the electrostatic adsorption device (4);
the ionization device (3) comprises a fixed bolt (301) and a plurality of ionization plates (302); a plurality of the ionization plates (302) are arranged side by side; the fixed bolt (301) fixes the ionization plate (302); two ends of the fixing bolt (301) are fixed on the side surface of the hollow cavity (101); the ionization plate (302) is electrically connected with a battery for supplying power;
the electrostatic adsorption device (4) comprises a fixing rod (401), a positive plate (402) and a negative plate (403); the positive plates (402) and the negative plates (403) are arranged on the fixing rod (401) in a staggered mode; two ends of the fixing rod (401) are fixed on the side surface of the hollow cavity (101); the positive plate (402) and the negative plate (403) are electrically connected with a battery for supplying power;
the ionization device (3) ionizes dust entering from the dust suction opening (103), and then the dust charged with static electricity is adsorbed by a positive plate (402) and a negative plate (403) of the electrostatic adsorption device (4);
the front surface of the top plate (7) is provided with a plurality of vent holes (701) for air flow to pass through side by side.
2. The blackboard eraser based on electrostatic adsorption according to claim 1, characterized in that the outer surface of the casing (1) is compounded with a layer of insulating material, which comprises rubber or insulating plastic.
3. The blackboard eraser based on electrostatic adsorption according to claim 1, characterized in that a plurality of support ribs (1031) are uniformly arranged in the channel connecting the dust suction port (103) and the hollow cavity (101).
4. The blackboard eraser based on electrostatic absorption according to claim 1, characterized in that the open end of the battery compartment (105) is equipped with a cover plate (106) for fixing the battery.
5. The blackboard eraser based on electrostatic adsorption according to claim 1, wherein adjacent ionization plates (302) are fixed by a positioning sleeve, and the positioning sleeve is mounted on a fixing bolt (301); and two ends of the fixing bolt (301) are respectively engaged with a fixing nut for limiting and fixing the ionization plate (302).
6. The blackboard eraser based on electrostatic adsorption according to claim 1, characterized in that adjacent positive plates (402) and negative plates (403) are fixed by a positioning sleeve, and the positioning sleeve is mounted on a fixing rod (401); and fixing nuts used for limiting and fixing the positive plate (402) and the negative plate (403) are meshed at two ends of the fixing rod (401).
7. The blackboard eraser based on electrostatic adsorption according to claim 1, characterized in that a centrifugal fan (601) is installed in the middle of the air draft device (6); the centrifugal fan (601) performs air draft on the hollow cavity body (101) to suck dust; the centrifugal fan (601) is electrically connected with the battery for power supply.
8. The blackboard eraser based on electrostatic adsorption according to claim 1, characterized in that the housing (1) is provided with a slot (104) on each side of the upper surface; two sides of one surface of the top plate (7) are respectively provided with a buckle (702); the buckle (702) is matched with the clamping groove (104) to fix the top plate (7).
9. The electrostatic adsorption-based blackboard eraser control system according to claim 1, comprising a push switch and an MCU; the push switch is electrically connected with the MCU;
the MCU is electrically connected with the ionization device, the centrifugal fan and the electrostatic adsorption device respectively;
the pressing switch transmits a switch signal to the MCU, and the MCU controls the ionization device, the centrifugal fan and the electrostatic adsorption device to be switched on and off according to the switch signal transmitted by the pressing switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011456719.8A CN112428729A (en) | 2020-12-11 | 2020-12-11 | Blackboard eraser based on electrostatic adsorption and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011456719.8A CN112428729A (en) | 2020-12-11 | 2020-12-11 | Blackboard eraser based on electrostatic adsorption and control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112428729A true CN112428729A (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011456719.8A Withdrawn CN112428729A (en) | 2020-12-11 | 2020-12-11 | Blackboard eraser based on electrostatic adsorption and control system thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112428729A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110062166A (en) * | 2009-12-02 | 2011-06-10 | 정세라 | Chalk eraser cleaner with principle of electric precipitation |
| CN203550066U (en) * | 2013-11-29 | 2014-04-16 | 常州市伟泰电子科技有限公司 | Ionization and adsorption type air purifier |
| CN205253354U (en) * | 2015-12-21 | 2016-05-25 | 黄河科技学院 | Automatic electrostatic dust collection system of city air |
| CN207088804U (en) * | 2017-03-06 | 2018-03-13 | 李珏 | A kind of hand-held automatic dust-absorbing blackboard is wiped |
| CN208021057U (en) * | 2018-04-23 | 2018-10-30 | 安徽工业大学工商学院 | A kind of electrostatic dedusting blackboard eraser |
| CN109530085A (en) * | 2018-11-26 | 2019-03-29 | 苏静雯 | A kind of haze elimination unmanned plane |
| CN211493465U (en) * | 2020-01-20 | 2020-09-15 | 长安大学 | Electrostatic dust removal blackboard eraser |
-
2020
- 2020-12-11 CN CN202011456719.8A patent/CN112428729A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110062166A (en) * | 2009-12-02 | 2011-06-10 | 정세라 | Chalk eraser cleaner with principle of electric precipitation |
| CN203550066U (en) * | 2013-11-29 | 2014-04-16 | 常州市伟泰电子科技有限公司 | Ionization and adsorption type air purifier |
| CN205253354U (en) * | 2015-12-21 | 2016-05-25 | 黄河科技学院 | Automatic electrostatic dust collection system of city air |
| CN207088804U (en) * | 2017-03-06 | 2018-03-13 | 李珏 | A kind of hand-held automatic dust-absorbing blackboard is wiped |
| CN208021057U (en) * | 2018-04-23 | 2018-10-30 | 安徽工业大学工商学院 | A kind of electrostatic dedusting blackboard eraser |
| CN109530085A (en) * | 2018-11-26 | 2019-03-29 | 苏静雯 | A kind of haze elimination unmanned plane |
| CN211493465U (en) * | 2020-01-20 | 2020-09-15 | 长安大学 | Electrostatic dust removal blackboard eraser |
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Application publication date: 20210302 |