ES2738403A1 - AIR QUALITY IMPROVEMENT SYSTEM IN THE BLACKBOARD ENVIRONMENT BY LOCALIZED EXTRACTION OF CONTAMINATED AIR (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

System for improving air quality in the environment of a slate (1) by localized extraction of contaminated air comprising at least one of the following devices: - A perforated slate (1') with holes (8) on the surface, - An erasing strip (10) with the ability to slide along paths (9) along the board (1), - A manual eraser (5) with an air intake (12), - A cleaning port (18) with a support surface (17) perforated with through holes (16) to deposit the manual eraser (5), where: - each device comprises a plenum (2) or extraction chamber that communicates the room where the board (1) is located with an outlet (3) for the extraction of air through an extraction duct, so that the plenum (2) is in depression with respect to the room. (Machine-translation by Google Translate, not legally binding)

Description

AIR QUALITY IMPROVEMENT SYSTEM IN THE BLACKBOARD ENVIRONMENT

THROUGH LOCALIZED EXTRACTION OF POLLUTED AIR

OBJECT OF THE INVENTION

The present invention relates to an air quality improvement system in the environment of a slate during its use by localized extraction of contaminated air, consisting of one or more devices whose essential purpose is to eliminate contaminants, whether solid particles or chemical contaminants, which are generated by writing on a board, erasing the board or cleaning the manual eraser used to erase the board, so that those contaminants are not inhaled by users of the board.

The interest of this invention is based on the fact that, although the pollutants generated on the board may not cause excessive damage to the air quality of the room where the boards are located, they can lead to health problems and welfare of teachers and users of the boards that use them for several hours a week, due to the intensity of their use and the high proximity of these people to the specific area of generation of pollutants, such as chalk, marker pen, whiteboard or manual eraser.

TECHNICAL PROBLEM TO BE SOLVED AND BACKGROUND OF THE INVENTION

Since the chalkboard began to be used on the walls of the classrooms in the 19th century, the problem related to the control of the emission of dust during the erasure of the blackboard or the cleaning of the manual eraser has only made progress in moderate scope that have mainly been focused on the materials to be used, the mode of manufacture and the design, both of the chalks and of the manual drafts. Except for improvements in the composition and manufacture of chalks so that they emit a smaller amount of dust during writing, no significant progress is known in terms of reducing the generation of chalk particles during writing, during erasure and during cleaning of the manual draft or in relation to preventing the generated dust from being breathed by teachers or other users.

Since white marker pens began to be marketed in the sixties, except for some improvements in the composition of the markers, there are no known significant advances in terms of reducing the generation of pollutants during writing, mainly or in writing. referring to preventing the emitted pollutants from being breathed by teachers or other users.

The effects on the health and well-being of teachers and other blackboard users are general, although they differ depending on whether the blackboard is made of chalk or markers, so that, in the case of chalk boards, they translate into greater risk of suffering from diseases or respiratory conditions such as aphonia, wheezing, chronic bronchitis, respiratory tract irritation and kaolinosis, while, in the case of whiteboards for markers, problems in health and well-being translate into a greater risk of suffer from olfactory discomfort, respiratory irritation, nausea and dizziness, and even poisoning in case of excessive inhalation.

Currently, the substitution of these slates is being attempted through the incorporation of electronic whiteboards whose use does not emit dust or contaminating chemical products, although the complexity of use and their high cost compared to traditional slates results in the use of traditional slates, either chalk or markers, continue to be incorporated and used in schools of all levels around the world, as well as in buildings used by companies, institutions and even in homes.

The present invention makes it possible to significantly improve the air quality of a user during the use of the board by using one or more of the devices described without incurring the high cost of an electronic board or requiring The complexity of its use.

DESCRIPTION OF THE INVENTION

In order to achieve the objectives and avoid the aforementioned drawbacks, the present invention describes a system for improving air quality in the environment of a slate by localized extraction of contaminated air.

The system can comprise a series of devices, all of them independent of each other, although complementary to each other, being able to share some type of connections or common elements, so that they are not installed redundantly.

Among the devices are the following:

- A perforated slate with holes in the surface for the extraction of the contaminating material, either chalk dust or marker residue,

- An erasing strip with erasing elements that are in contact with the board to carry out the erasure and an air intake for the extraction of the contaminated air, which also comprises a fixing element at each end for the sliding along paths along the board,

- A manual eraser, consisting of a body and some erasing elements that form the erasing surface and an air intake for the extraction of contaminated air,

- A cleaning port for the manual eraser with a support surface, for the deposit of the manual eraser, perforated with through holes for the extraction of the contaminating material, either chalk dust or marker residue.

Each of the aforementioned devices comprises a plenum or extraction chamber that communicates the room where the board is located with an outlet for the extraction of air through an extraction duct, so that the plenum is in depression with respect to the living room.

The communication of the plenum with the room is carried out as follows:

- on the perforated slate, through the holes,

- on the ribbon and on the manual eraser, through the air intake, and

- in the cleaning port, through the through holes.

Each of the devices is capable of incorporating an extractor, for the extraction of air from the room to the extraction duct that ends at the outlet, a filter for the return of contaminated air already filtered outside, to the room or another space, or both together. In case the system incorporates more than one device and the system needs to incorporate extractor, filter or both, the system can be configured to only include one of the elements and thus not be in redundancy that, despite being more efficient, It is less profitable.

In cases where the system incorporates an extractor or filter, these may be located in a position inside the plenum or in the extraction duct upstream of the outlet.

On the other hand, in case of incorporating an air extractor, the devices need to incorporate an electrical connection for activation, which can be by means of a switch, a timer or a sensor that, in turn, can be face-to-face, contact, pressure or of movement.

The electrical connection for the activation of the air extractor can be by means of a connection to a mains outlet or by means of a battery that, in turn, can be rechargeable or of a single use.

Referring to the slat, the extraction duct that communicates the outlet with the plenum can be rigid, so that it is integral with the slat and the outlet is moved with the slat itself, or it can be flexible, so that is not integral to the bar and the outlet is fixed, for example, to a wall.

The same applies to the manual eraser, where the extraction duct that communicates the outlet with the plenum can also be rigid or flexible, depending on whether it is intended to be integral to the manual eraser or to be fixed in a place independent of the eraser Handbook.

For the removal of contaminated air from the room, the strip, instead of a single air intake and a continuous erase element, can incorporate a plurality of air intakes and erase elements. In these cases, the positions of the air intakes may be located alternating with the positions of the erasure elements or they may be coincident with the positions of the erasure elements, so that air enters the plenumum passing through the erasure elements. , causing the cleaning of the deletion elements.

As an additional component, the strip can also incorporate an inner air supply channel that communicates the erasing elements with an air impeller, so that the air passes through the erasing elements to the outside of the plenum to be subsequently collected, in the environment of the board, by the air intakes.

For its part, the manual eraser may comprise an erasure element that encompasses the entire air intake or that the air intake is peripheral to the erasure element.

Like the ribbon, the manual eraser can also comprise an inner air supply channel that communicates the erase element with an air impeller, leaving the contaminated air out of the plenum, towards the board, to be collected by the air intake.

In the cleaning port, the extraction duct that communicates the outlet with the plenum can also be rigid or flexible, as in the case of the slat and the manual eraser, as it is intended to be integral with the cleaning port itself or that it is fixed in an independent place so that the cleaning port can be located in different areas, according to interest. The extraction channel is in depression with respect to the room where the board is located. This depression is typically carried out by means of an air extractor that can incorporate a filter for the return of clean air to the environment. It is also configured to detect when a manual eraser has been deposited on the support surface, so that the extractor is activated.

BRIEF DESCRIPTION OF THE FIGURES

To complete the description of the invention and in order to help a better understanding of its characteristics, in accordance with a preferred example of its realization, a set of drawings is attached where, for illustrative and non-limiting purposes, represented the following figures:

- Figure 1 represents a perspective view of a perforated slate with holes in the writing surface and an extraction plenum connected to an outlet, indicating the entry and exit of the air.

- Figure 2 represents a sectional view of the slate of Figure 1, representing the direction of the air entering the board, the exit and through the plenum.

- Figure 3 represents a perspective view of the slate of Figure 1 where an external duct has been incorporated into the slate plenum for the extraction of the polluted air that incorporates an air extractor and a filter before the outlet.

- Figure 4 represents a front view of a slate with a movable slat along guides for erasing the slate incorporating an extraction duct with an extractor and a filter before the air outlet.

- Figure 5 represents a front view of the board with the slat of figure 4 where the extraction duct is a flexible tube.

- Figure 6 represents a side sectional view of the board with the slat of figure 4 showing the constituent elements and with the extraction duct located in a different position.

- Figure 7 represents a partial sectional view of the area of the slat plenum of Figure 6, including several erasing elements and several air intakes.

- Figure 8 represents the view of Figure 7 where the air intakes physically coincide with the erasing elements, so that the air absorbed into the plenum crosses the erasing surface.

- Figure 9 represents the view of Figure 7 where the plenum incorporates an inner air supply channel that communicates with the erasing elements so that the air is expelled outside by the manual drafts and is introduced into the plenum by the air intakes

- Figure 10 represents a sectional view of a manual eraser that incorporates in the plenum a polluted air extraction channel connected to an extractor and a filter before going outside through the outlet.

- Figure 11 represents a front view of a slate with a manual eraser that incorporates an external extractor and filter connected by a flexible conduit.

- Figure 12 represents a side sectional view of the manual eraser of Figure 11 showing the internal configuration of the plenum.

- Figure 13 represents a side sectional view of the manual eraser with air intakes peripherally surrounding the erasing elements.

- Figure 14 represents the configuration of the manual eraser represented in Figure 13 where a supply channel has been incorporated that returns the air to the board through the erasing elements.

- Figure 15 represents a sectional view of a cleaning port for a manual eraser with the eraser on the perforated support surface with through holes showing the direction of air flow.

- Figure 16 represents a view of Figure 15 incorporating an extractor and an air filter in the extraction duct before the outlet.

The following is a list of the references used in the figures:

1. Blackboard.

one'. Perforated slate.

2. Extraction plenum.

3. Outlet.

4. Fixing elements.

5. Manual draft.

6. Air extractor.

7. Air filter.

8. Holes.

9. Guides.

10. Clearing strip.

11. Flexible tube.

12. Air intakes.

13. Deletion elements.

14. Inside air supply channel.

15. Manual eraser body.

16. Through holes.

17. Support surface.

18. Cleaning port.

DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION

In order to achieve the objectives indicated in previous sections, the invention consists of a system of improvement of the air quality in the environment of the slate by means of the localized extraction of the contaminated air, during its use, the system being able to be configured in different ways depending of the devices you incorporate. For this, the system incorporates at least one of the devices mentioned below, being able to be several simultaneously:

- A perforated slate (1 ’) for contaminant absorption by extracting the air through the holes (8) of its surface.

- A ribbon (10) that moves linearly to erase the board (1).

- A manual eraser (5) with aspiration for erasing the board (1).

- A cleaning port (18) for the manual eraser (5) of the board (1).

Below is a description of each of these devices (1 ’, 5, 10, 18).

A) PERFORATED SLATE (1 ’) FOR CONTAMINANT ABSORPTION THROUGH THE

AIR EXTRACTION THROUGH THE HOLES (8) OF ITS SURFACE.

As shown in Figures 1 to 3, the removal of contaminated air during writing on the board (1), regardless of whether it is white or chalk, can be solved by providing a perforated board (1 ') that incorporates holes (8) on the writing surface. Contaminated air from the surface of the perforated slate (1 ') is extracted from the room where the perforated slate (1') is located through the holes (8) located on the surface of the perforated slate (1 ' ) to pass an extraction plenum (2) located in the back area of the perforated slate (1 '), which is in depression with respect to the room to be extracted through an extraction conduit to an outlet (3). In this way, the air carries in its displacement the gases of the markers or the chalk dust, depending on the type of slate (1) in question.

In a first embodiment, as shown in Figure 2, the outlet (3) for the extraction of contaminated air from the extraction plenum (2) is directly connected to a duct in depression or air suction element , not shown in the figure, external to the device.

In a second embodiment, as shown in Figure 3, the device incorporates an air extractor (6), which is responsible for aspirating the air from the room through the holes (8) of the perforated slate (1) '), passing through the plenum (2) to be expelled outside the device.

In any of the different embodiments, the device can incorporate an air filter (7) so that the contaminated air is filtered before leaving the device through the outlet (3).

B) DELETE LIST (10) THAT MOVES THROUGH THE SLATE (1). Another way to solve the removal of contaminated air during the erasure of the board (1) is by incorporating into the system an erasing strip (10) that moves from one end of the board to the other (1), either horizontally, as shown in figures 4 to 9, or also vertically. For the sliding of the slat (10), externally to the board (1) and on two opposite sides a pair of guides (9) are placed parallel to the movement of the slat (10).

In one embodiment, the slat (10) is vertical, for which there are two horizontal guides (9) next to the board (1), one above the top and one below the bottom, respectively, in areas located outside the writing area of the board (1).

In another embodiment, the strip (10) is horizontal, for which there are two vertical guides (9) next to the board (1), one to the left of the left edge and one to the right of the right edge, respectively, in areas located outside the writing area of the board (1).

On the other hand, the strip (10) incorporates at each end a fixing element (4) which, preferably, incorporates a recess destined to accommodate the respective guide (9) for its sliding along said guides (9). To facilitate sliding, the fixing elements (4) can incorporate bearings or some type of mechanism that helps reduce friction during travel.

Preferably, the cross-section of the hollow of the fixing element (4) and, therefore, of the guides (9) is circular. In any case, neither the holes have to be circular, nor the fixing elements (4) have to incorporate holes, being able to alternatively incorporate any other form of fixing with complementary shapes for the sliding of the fixing elements (4) to along the guides (9), for example, wheels that move along rails.

To carry out the erasure of the slate (1), the strip (10) comprises an erasure element (13) and an air extraction outlet (12) that sucks the air from the slate (1) towards a plenum of Extraction (2) located on the slat (10), as shown in Figure 6. Both the erase element (13) and the air extraction socket (12) occupy the entire height of the board (1) so that, in case of erasing the board (1) there is no area left without sweeping. The erasing element (13) has as main object the erasure of the slate (1) by separating the chalk particles or marker ink adhered thereto, while the air extraction outlet (12) is intended the extraction of the particles that have already been separated from the board (1) by the erasing element (13) to be led to the outlet (3) of the extraction duct through the plenum (2).

Both the erase element (13) and the air intake (12), instead of being configured by a single individual element, can be formed by several, there may be several erase elements (13) and also several air intakes ( 12), as shown in Figures 7 and 8. In fact, the positions of the air intakes (12) can physically coincide with the positions of the erase elements (13), as shown in Figure 8. The The result of this configuration is that the contaminated air is absorbed into the air intakes (12) and forced to pass through the erasing elements (13) before reaching the extraction plenum (2) inside the slat. Otherwise, the air intakes (12) are positioned alternately with respect to the erasing elements (13), as shown in Figure 7, so that the contaminated air is absorbed into the plenum (2) by the air intakes (12) without passing through the erasing elements (13).

The deletion element (13) is in contact with the board (1) and performs the deletion action when the erasing strip (10) moves through the guides (9). For its part, the air extraction outlet (12) is responsible for the flow of incoming air from the outside of the slat (10) to the extraction plenum (2) inside the slat (10). The result is that the inlet air is absorbed into the air intakes (12) including chalk or marker dust that the erasing elements (13) have detached from the board (1) to be led to the outlet ( 3) of the extraction duct through the plenum (2).

ll

The erasing strip (10) can incorporate an air extractor (6), which causes the movement of the room air towards the plenum (2) inside the slat (10) and, preferably, also a filter (7), for filtering the air before leaving the device through the air outlet (3) so that the air is returned clean to the room or to the environment in general.

In one embodiment, both the extractor (6) and the filter (7) are at a fixed point, not integral to the slat (10), and connected to the slat (10) through a flexible conduit (11), as depicted in figure 5.

In another embodiment, as shown in Figures 4 and 6, the extractor (6) and the filter (7) are integral with the slat (10) and move with it.

In figure 7 it is represented how the contaminated inlet air is absorbed towards the air intakes (12) to be subsequently directed towards the outlet (3) of the extraction duct through the plenum (2). In this case, the air intakes (12) are located alternately with respect to the erasure elements (13) so that, although some air may pass through the erasure elements (13), the most will go through the air intakes (12).

An alternative embodiment is that shown in Figure 8 where the air intakes (12) coincide with the erasing elements (13), so that the chalk or ink dust particles detached from the slate (1 ) are attracted to the erasure elements (13) and tend to adhere or pass through them before reaching the extraction plenum (2).

In another alternative embodiment, the plenum (2) incorporates an internal air supply channel (14) that communicates with the erasing elements (13), as shown in Figure 9, where the impellers have not been represented. In this embodiment, the air flow circulates in the opposite direction, leaving the erasing elements (13) towards the board (1) from the inner air supply channel (14). The result of this configuration is that the incoming air is absorbed into the air intakes (12) including chalk or marker dust that the erasing elements (13) have detached from the board, this process can be helped or complemented by the delivery, from the inner channels of air supply (14), of the air that passes through the erasing elements (13) and which causes chalk particles or marker ink particles adhered to the erasure elements (13), they detach from these elements and are absorbed through the air intakes (12) towards the extraction plenum (2) inside the slat (10), thereby cleaning the erasing elements (13). It should be noted that the flow of discharge air exiting the slat (10) by the erasing elements (13) is lower than the flow of air entering the lath (10) by the air intakes (12).

The strip (10) can incorporate a motor to activate the movement along the guides (9).

C) MANUAL DRAFT (5) WITH SUCTION FOR DELETING THE BOARD (1).

Another way to solve the removal of contaminated air during the erasure of the board (1) is by incorporating into the system a manual eraser (5) connected to an air extraction outlet, so that the air enters from the room to the plenum (2) of the manual eraser (5) and is directed towards the outlet (3) of the extraction duct. This device is represented in figures 10 to 14.

In one embodiment, the manual eraser (5) can incorporate an air extractor (6) and, alternatively, also a filter (7), as shown in Figure 10. In these cases, both the extractor (6) as the filter (7) can be incorporated inside the plenum (2), in the body of the manual eraser (15), for better protection, or next to it, in a recordable or external area, for better access to maintenance works

In another embodiment, an air extractor (6) and, alternatively, a filter (7) may be located in an area outside the manual eraser (5), as shown in Figure 11, where both elements (6, 7) communicate with the manual eraser (5) through a flexible tube (11).

Despite being a dispensable element, the incorporation of a filter (7) ensures that the dust generated in the erase process is accumulated in the manual eraser (5) or in an area outside the manual eraser (5) instead of move into the environment

On the other hand, the removal of contaminated air from the room towards the plenum (2) of the manual eraser (5) can be done through the erasure element (13) that configure the porous surface of erasure, as shown in the figures 10 and 12, or through air extraction jacks (12) located perimeter to the erase element (13), but not coincident, as shown in Figures 13 and 14. In this last configuration, the air does not require passing through the deletion element (13), thus avoiding the loss of load that this may entail. On the other hand, the aspiration focuses on the perimeter of the erase element (13), which is the area that receives the most dust during the erase, so that cleaning is facilitated by aspiration located near that dirtiest area.

In an alternative embodiment, the manual eraser (5) also incorporates an internal air supply channel (14) that communicates an impeller, not shown in the figure, with the deletion element (13), as shown in the Figure 14. In this way, on the one hand the manual eraser (5) incorporates an internal air discharge channel (14) with one of its ends directed towards the erasing element (13) of the manual eraser (5) and in which Another end is an air impeller, not shown in the figures, so that cleaning of the erasing element (13) can be facilitated by means of the air impulsion towards the erasing surface. On the other hand, the manual eraser (5) also incorporates an air extraction outlet (12), located peripherally to the erase element (13), so that the air leaving the manual eraser (5) by the erase elements (13), it is absorbed again by this air extraction outlet (12) without leaving the manual eraser (5) to the room. It should be noted that the air extraction flow rate is greater than the flow rate. In this embodiment, a cleaning of the erasing element (13) is achieved, which can be carried out simultaneously with the erasing process or independently.

D) CLEANING PORT (18) FOR THE MANUAL DRAFT (5) OF THE SLATE (1). Another way to solve the removal of contaminated air during the erasure of the board (1) is by incorporating into the system a cleaning port (18) for the manual eraser (5) of the board (1).

In this way the manual eraser (5), impregnated with chalk or marker dust, which has been used for cleaning a slate (1), is coupled to a support surface (17) that incorporates through holes (16) , so it is perforated, and is located at the entrance of the cleaning port (18). At the time of the coupling, the extraction of air is activated, which causes the air in the room where the board is located (1) to enter the manual eraser (5) through the area around the body of the eraser (15) to cross the erase element (13) and exit to go to the plenum (2) of the cleaning port (18) and then to an exit mouth (3), causing the erase element to be cleaned (13).

Air extraction occurs because the plenum (2) is in depression with respect to the room where the board is located (1). This depression is due to the fact that the extraction duct is connected to an element in depression or, preferably, by the location of an extractor (6) that is either inside the plenum (2) or outside it, in the extraction duct, so that the required depression occurs. In either case, the cleaning port (18) can incorporate a filter (7) next to the extractor (6), so that the air that is returned to the room or the environment, in general, is clean of impurities

In addition, the extraction duct that joins the outlet (3) with the cleaning port (18) can be rigid or it can be a flexible duct (11), so that it can be located in the most suitable position that favors the depression required

With this configuration, a cleaning of the manual eraser (5) without dust emission to the environment is achieved, which is interesting, since the process of cleaning the manual eraser (5) by traditional methods is one of the most dust generated to the environment and more inconvenience generates the user who performs it due to the involuntary aspiration of that dust.

In this way, the system of the invention can have at least one of the described contaminated air extraction devices (1 ', 5, 10, 18). In the case of presenting more than one device (1 ', 5, 10, 18), the connections will contemplate the use of a single extractor (6), with or without a filter (7), for an efficient non-redundant form of the system.

In general, the outlet (3) of the extraction duct can be connected to the room, returning the air, or another space that can be outside.

In addition, in any of the embodiments of the different devices (1 ', 5, 10, 18) described for incorporation into the system, the device (1', 5, 10, 18) may incorporate, although they have not been represented in the figures, a switch, a timer or a sensor that can be of presence, contact, pressure or movement, so that the air extractor (6) is activated by a method that can be manual or automatic and electrically activated by connection to the mains or by batteries, whether rechargeable or single use.

Finally, it should be noted that the present invention should not be limited to the embodiment described herein. Other configurations may be made by those skilled in the art in view of the present description. Accordingly, the scope of the invention is defined by the following claims.

Claims (19)

1. - System of improvement of the quality of the air in the surroundings of a slate (1) by means of localized extraction of the polluted air characterized by that it comprises at least one of the following devices: - A perforated slate (1 ’) comprising a surface with holes (8), - An erasing strip (10) comprising a fixing element (4) at each end for sliding along guides (9) along the board (1), erasing elements (13) in contact with the board (1) to carry out the erasure and an air intake (12), - A manual eraser (5) comprising a body (15) and an erasing surface with erasing elements (16) and an air intake (12), - A cleaning port (18) for the manual eraser (5) comprising a support surface (17) perforated with through holes (16) for the deposit of the manual eraser (5), where: - each of the devices (1 ', 5, 10, 18) comprises an extraction plenum (2) that communicates the room where the board is (1) with an outlet (3) for the extraction of air by an extraction duct, so that the plenum (2) is in depression with respect to the room, so that: - the communication of the plenum (2) with the room is through the holes (8) on the perforated board (1 '), through the air intake (12) on the strip (10) and in the manual eraser (5) and through the through holes (16) in the cleaning port (18). 2. - Air quality improvement system in the environment of a slate (1), according to claim 1, characterized in that at least one of the devices (1 ', 5, 10, 18) comprises an element to be selected between a extractor (6) for the extraction of air from the room to the outlet (3) of the extraction duct, a filter (7) for the return of contaminated air already filtered to a space to be selected from outside, the room and other space, and both. 3. - Air quality improvement system in the environment of a slate (1), according to claim 2, characterized in that both the extractor (6) and the filter (6) are located in a position to be selected from within the plenum (2) and in the extraction duct upstream of the outlet (3). 4. - Air quality improvement system in the environment of a slate (1), according to claim 2, characterized in that at least one of the devices (1 ', 5, 10, 18) comprises an element to be selected between a switch, a timer and a sensor for the activation of the air extractor (6). 5. - System of improvement of the quality of the air in the surroundings of a slate (1), according to claim 4, characterized in that the sensor is to select between face-to-face, contact, pressure and movement. 6. - Air quality improvement system in the environment of a slate (1), according to claim 4, characterized in that the activation of the air extractor (6) is carried out by electrical means to be selected from an electrical connection to a power outlet and a battery. 7. - Air quality improvement system in the environment of a slate (1), according to claim 6, characterized in that the battery is to be selected between rechargeable and single use. 8. - System for improving air quality in the environment of a slate (1), according to claim 1, characterized in that the extraction duct that communicates the outlet (3) with the plenum (2) in a Device to select between the slat (10) and the manual eraser (5) is to be selected between rigid and flexible. 9. - System for improving air quality in the environment of a slate (1), according to claim 1, characterized in that the strip (10) comprises a plurality of air intakes (12) and erasing elements ( 13). 10. - System for improving air quality in the environment of a slate (1), according to claim 9, characterized in that the positions of the air intakes (12) alternate with the positions of the erasing elements (13 ). 11. - Air quality improvement system in the environment of a slate (1), according to claim 9, characterized in that the positions of the air intakes (12) coincide with the positions of the erasing elements (13 ), so that the air enters the plenum (2) through the erasure elements (13), causing the erasure elements to be cleaned (13). 12. - Air quality improvement system in the environment of a slate (1), according to claim 9, characterized in that the slat (10) comprises an inner air supply channel (14) that communicates the elements of erased (13) with an air impeller. 13. - Air quality improvement system in the environment of a slate (1), according to claim 9, characterized in that the slat (10) is to be selected between horizontal and vertical and the guides (9) by which Scrolls are, respectively, vertical and horizontal and are located externally to the board (1). 14. - Air quality improvement system in the environment of a slate (1), according to claim 1, characterized in that the manual eraser (5) comprises an erasing element (13) that covers the entire air intake (12). 15. - Air quality improvement system in the environment of a slate (1), according to claim 1, characterized in that the manual eraser (5) comprises an air intake (12) peripheral to the erase element (13 ). 16. - Air quality improvement system in the environment of a slate (1), according to claim 14 or 15, characterized in that the manual eraser (5) comprises an internal air supply channel (14) that communicates the erase element (13) with an air impeller. 17. - Air quality improvement system in the environment of a slate (1), according to claim 1, characterized in that the cleaning port (18) comprises an extractor (6). 18. - Air quality improvement system in the environment of a slate (1), according to claim 1 or 17, characterized in that the cleaning port (18) comprises a filter (7) in the extraction channel. 19. Air quality improvement system in the environment of a slate (1), according to claims 17 or 18, characterized in that the cleaning port (18) is configured to activate the extractor (6) when detecting the deposit of the manual eraser (5) on the support surface (17).