CN1217636A

CN1217636A - Air treatment

Info

Publication number: CN1217636A
Application number: CN97194366.4A
Authority: CN
Inventors: M·A·J·贝范; A·C·克拉林鲍尔德; N·D·瓦伦
Original assignee: British American Tobacco Co Ltd
Current assignee: British American Tobacco Investments Ltd
Priority date: 1996-03-07
Filing date: 1997-02-19
Publication date: 1999-05-26
Also published as: WO1997032504A1; AU1804697A; PT888073E; EP0888073B1; ES2141596T3; CA2247934A1; GB9605115D0; EP0888073A1; GR3032700T3; AU714592B2; ATE188353T1; ID16767A; NZ331584A; JP2000506042A; DE69701087D1; DE69701087T2; AR006144A1

Abstract

A table (1) in combination with air treatment means (5) which exhibits improved air filtration efficiency, particularly in respect of removal of particulate matter, such as tobacco smoke, from the environment about the top of the table. The table in combination with air treatment means of the present invention is furthermore, a combination with improved practical application and commercial viability.

Description

Air-treatment

The present invention relates to the air-treatment on desk.

The example that many air processors that combine with desk are arranged.For example, DE3410288 and U.S.4248162 all disclose table top comprise an air intake and install to this table top below on the desk of air filter.JP6-344519 and JP7-184723 disclose the desk of the central tube that the top that is included in table surface stretches out, and air flows by this pipeline, air filter be positioned at this table top below.

Also have, many examples that are applicable to the filter unit that uses in such desk are arranged.For example, U.S.4886526 discloses a kind of filter cartridge of removing, and it comprises the conduction screen that is clipped in an inside between two nonconducting sheet of filter material, and the screen that makes conduction is on any one side of this filter cartridge.The size of the conduction screen of this inside is littler than the conduction screen of outside.

The purpose of this invention is to provide the desk that combines with air processor, it has the air filter efficiency that has improved.Purpose of the present invention also provides the desk that combines with air processor, and it has long coml service life.

The invention provides the desk that combines with air processor, described desk comprises a table top, described air processor comprises the atmospheric gas inlet unit with the environmental communication of the top of described table top, air guiding device, casing device, air filter, an air distribution plenum in the described housing that defines by described air filter, and the air outlet device of described housing, air guiding device can be drawn into described air distribution plenum to air by described environment by described atmospheric gas inlet unit, therefore by described air filter, and by described air outlet device, the air flow section of described air filter ratio is big at least 10 times at the air flow section of the minimum of described atmospheric gas inlet unit.

This air filter is preferably electric air filter, and air filter for example polarizes.In addition, or affix, this air filter can also comprise chemical air filter, for example a carbon filter.

Best, the air flow section of this filter is than big at least 15 times at the air flow section of described atmospheric gas inlet unit.Preferable is that the air flow section of filter is than big at least 20 times at the air flow section of described atmospheric gas inlet unit.

This air filter can comprise a plurality of polarization filter unit, in these unit each is along the each several part setting of the periphery of described air distribution plenum, the a plurality of described unit of forming in one group of described unit is connected to each other on circuit, makes described group the unit of described unit number can be used as a single electric air cleaner.

Many set filters unit can be arranged, and the unit in every group is connected to each other on circuit, makes every group unit can be used as a single polarization filter.The integral body of these unit is preferably on the circuit and is joined to one another, thereby forms a single filter.

Best, the whole air flow section of filter element compares at the air flow section of the minimum of atmospheric gas inlet unit big at least 10 times.Preferable is that the whole air flow section of this filter element compares big at least 15 times at the air flow section of atmospheric gas inlet unit.Preferable is that the whole air flow section of filter element that plays a single filter compares big at least 20 times at the air flow section of atmospheric gas inlet unit.

This desk can be dining table, coffee table, desk, workbench, bar counter, table for computer, conference table or analog.In plane, desk can be circle, square, rectangular, polygonal, L shaped, oval or other shape.

Suitable is, the position that the neighboring of atmospheric gas inlet unit is positioned at the outward flange that leaves table top or leaves people place when he is sitting in by the desk is no more than one meter position.Best, atmospheric gas inlet unit is positioned at the position that the outward flange that leaves table top is no more than 0.6 meter.

This atmospheric gas inlet unit can comprise a grid or silk screen.Should there be enough big size in the hole of air intake grid or net, so that guarantee not hindered by the air stream of this inlet device, but size is enough little again, can not pass through this atmospheric gas inlet unit so that guarantee object such as stub.

Atmospheric gas inlet unit comprises a continuous wall, and this wall is stretched upwards by table top.This wall is used for effective collecting zone of this air intake is elevated to a position in the surface of table top.Effectively the height that protection walls stretches is depended in the position of collecting zone above table top.Also have, when this wall is used for stoping the user not note this atmospheric gas inlet unit is sealed, such as because an object is placed on the top of this atmospheric gas inlet unit.

Suitable is that air guiding device is a fan.

The major part of the total surface area of the wall that stretches upwards of housing is preferably air outlet device.Air flow section at air outlet device is preferably little or significantly little unlike the latter unlike the cross section of air filter.Air outlet device can comprise a grid or silk screen.

Housing can comprise for example three or more wall that stretches upwards, and perhaps housing can have the cylindrical configuration that upwards stretches.Table top can form the upper wall of housing, and the pedestal of housing can be parallel with table top.

This housing preferably is fastened on the table top directly or indirectly.Best, this housing is fastened on the downside of table top.It also is favourable on the table top that this housing removably is fastened to.

Suitable is that filter is arranged so that the air stream that enters air distribution plenum does not at first change direction and just can not pass through filter.The change of direction can for example be 90 degree, can be by roughly becoming general horizontal direction downwards.

Polarization filter above-mentioned unit preferably is configured to parallel with the wall that stretches upwards of housing.Best, filter unit is adjacent to each other, thereby forms a continuous basically wall of filter element about the periphery of air distribution plenum.Suitable is that filter unit is the periphery of air distribution plenum or the cross section of a level of air distribution plenum about the periphery that it is provided with.Filter can be provided with air outlet device.

Be provided for preferably including first a conduction screen that is sandwiched between two nonconducting filtering materials that combine with one second conduction screen according to polarization filter of the present invention.In the process of filter operation, keeping first screen is a high direct voltage, is positive potential with respect to second screen preferably, the best ground connection of this second screen, or the current potential that it is held at ground.Potential difference between first screen and second screen can be in the scope of 4-10 kilovolt.Best, the potential difference between first screen and second screen is in the scope of 4-7 kilovolt.

Best, first screen and two non electrically conductive material thin slices are fitted together each other, thereby a single fuse of being made up of three parts is provided, this fuse can be removed, and when needs it is abandoned, and replaces with a new fuse.Similarly, if filter is made up of filter unit connected to one another on a plurality of circuit, best, each unit comprises the fuse that can remove, and this fuse can comprise that one is sandwiched in first screen between the non electrically conductive material thin slice.

One comprises that the air filter of a polarization filter also can comprise chemical air filter, for example a carbon filter.These carbon filters preferably are positioned at the downstream of polarization filter unit, thereby make air successively by polarization filter, pass through carbon filter then.

In order to be expressly understood the present invention, and can easily realize the present invention, now will be in the mode of example with reference to the schematic diagram here, in these figure:

Fig. 1 shows a desk and a section of the air processor that combines with it, and this is in conjunction with the desk that a kind of smoker's ventilation is provided;

Fig. 2 shows the bottom view of the air processor of Fig. 1; And

Fig. 3 shows and has and bottom view below the air processor of the different filter shown in Fig. 1 and 2.

With reference to figure 1, label 1 is integrally represented the top of a desk, and label 5 is integrally represented an air processor.A protection walls 2 is supported on this table top.This protection walls 2 is suitable for circular cross section in front view, it surrounds air intake 3, and this air intake 3 comprises a grid 3 '.Protection walls 2 can approximately stretch 10 centimetres above the upper surface at the top 1 of desk.

This air processor 5 comprises a housing 4, and the major part of the wall that stretches upwards of this housing 4 is the form of a grid, thereby

air outlet device

9a, 9b, 9c and 9d are provided.The pedestal 12 of this housing 4 is air proofs basically, and does not have air outlet slit.This air processor 5 also comprises the fan 6 that air guiding device is provided, an air distribution plenum 7 and a polarization filtration device 13, and this device is the form of single polarization filter.This filter is

single filter cartridge

8a, 8b, 8c and the 8d that is made up of three parts, each filter cartridge comprises one first wire mesh 14 that is clipped between two nonconducting sheet of filter material 15 and 15 ', and it combines with second wire mesh 11 of ground connection.The air flow section of this filter is the sectional area sum on the surface of filter 8a-d, these delimited air distribution plenum 7, that is,, only count the area of section of one deck of this unit for the filter unit of forming by three parts.Connection by means of electricity links together first screen 14 of each filter cartridge 8a-d.Be respectively equipped with the electric supply installation (not shown) for filter cartridge 8a-d with for fan 6.Power supply to the screen 14 of filter cartridge 8a-d provides 6 kilovolts positive electricity.Screen 11 is communicated with on circuit, and can be that machinery is coconnected, and keeping this screen is the current potential of ground connection.

By making fan 6 operation and to 14 power supplies of above-mentioned screen, and when a people is sitting in the other smoking of this desk, will be from the main plume that the side direction plume of smoldering and the quilt of cigarette are breathed out by air intake 3 by in the fan 6 suck air allocation space 7.Air is flowed out by this air processor 5 as the air that is filtered by air outlet device 9a-d by the screen 11 of filter cartridge 8a-d and ground connection.

Referring to Fig. 3, air processor 5 is basically with identical at the device shown in Fig. 1 and 2, difference is to comprise

additional carbon filter

10a, 10b, 10c and 10d, and its position is parallel with the polarization filter unit that screen 11 by filter cartridge 8a-d and ground connection provides, and adjacent with it.In use, fan 6 makes and is entrained in airborne cigarette and enters air distribution plenum 7 by air intake 3.The air that is filtered is subsequently flowed out by air outlet device 9a-d by the screen 11 and the carbon filter 10a-d of filter cartridge 8a-d, ground connection.

The following Example explanation is according to the use of the desk of smoker's of the present invention ventilation.

Example 1

Adopt the desk of smoker's as shown in Figure 3 ventilation.The air flow section of air intake 3 is 0.018 square metre.The air flow section of the filter cartridge 8a-d of polarization filter is 0.270 square metre.Therefore, the air flow section of filter is bigger 15 times than the air flow section of atmospheric gas inlet unit.

The desk of smoker's ventilation is placed in the room of sealing of a known volume.During this air processor of not using, light four cigarettes, and they are smoldered in the about 0.2 meter distance in the neighboring of leaving atmospheric gas inlet unit 3.Discovery is approximately every cubic metre 1150 microgram in the average peak concentration of the airborne particulate matter in the room of this sealing.

When using this air processor, repeat this process.The average peak concentration of the particulate matter of discovery in atmosphere is approximately every cubic metre 546 microgram.Therefore, this air processor has realized that particulate matter approximately reduces 53% in the room of this sealing.

Example 2

Adopt as about example 1 described device, be reduced to half needed time of this peak value, the i.e. half-life of the concentration of particulate in air matter by peak value in order that determine the concentration of the particulate in air matter of this closed room.

By in the room of sealing, lighting four cigarettes, and they are smoldered obtain this peak value.Another finds that average peak is approximately every cubic metre 1150 microgram.

When the air processor that does not have desk uses, find that the control half-life is 55-60 minute.When the air processor of desk just in use, find that the half-life is 13-15 minute.

Measure the average speed of the air of the air processor that enters example 1, and be found to be 3.25 per second rice.Measure the average speed of the air that leaves this air processor, and found to be approximately 0.26 per second rice.The air residence time that calculates polarization filter thus is approximately 0.1 second.

In comparison, the residence time that calculates the air that is contained in the air filter on the ceiling by a standard is approximately 0.01 second.The filter that is contained on the ceiling of underproof this standard is a Colt ConditionAir (trade (brand) name) filter, this Colt filter comprises an air flow section at air intake, and its size is in the scope of the size of the air flow section of this filter.The sort of filter of this Colt ConditionAir filter as in EP0585054, describing prevailingly.

The cross section of filter and cross section according to the atmospheric gas inlet unit of one aspect of the present invention Ratio make the residence time of the air stream in the filter longer. Like this greatly improved stay Stay the time to realize very significant filter efficiency.

As those technical staff that present technique is familiar with will recognize that, air distribution plenum 7 are used for guaranteeing that in the whole air stream cross section of filter uniform air distributes.

The benefit that is obtained by a second aspect of the present invention is, although the polarization filter unit is at electricity Couple together on the road, thereby these unit use as a single polarization filter, but Be to remove each unit as the unit that separates, and individually replace, and, in order to store And transportation, can be these unit packages Cheng Ping's.

Claims

1. desk that combines with air processor (5), described desk comprises a table top (1), described air processor (5) comprises the atmospheric gas inlet unit (3) with the environmental communication of the top of described table top (1), air guiding device (6), casing device (4), air filter (13), air distribution plenum (7) in the described casing device (4) that defines by described air filter (13) and the air outlet device (9) of described casing device (4), air guiding device (6) can be drawn into described air distribution plenum (7) to air by described environment by described atmospheric gas inlet unit (3), therefore by described air filter (13), and by described air outlet device (9), the air flow section of described air filter (13) ratio is big at least 10 times at the air flow section of the minimum of described atmospheric gas inlet unit (3).

2. according to the described combination of claim 1, it is characterized in that it is vertical with the direction of the air that is drawn into by described atmospheric gas inlet unit (3) that the direction of described air filter (13) is crossed in circulation of air.

3. according to claim 1 or 2 described combinations, it is characterized in that described atmospheric gas inlet unit (3) comprises a continuous wall device (2), described wall device is stretched upwards by described table top (1).

4. according to any one the described combination in the claim 1 to 3, it is characterized in that the air flow section of filter (13) is than big at least 15 times at the air flow section of described atmospheric gas inlet unit (3).

5. according to the described combination of claim 4, it is characterized in that the air flow section of filter (13) is than big at least 20 times at the air flow section of described atmospheric gas inlet unit (3).

6. any one the described combination in requiring according to aforesaid right, it is characterized in that, described air filter (13) comprises a plurality of filter units (8), in these unit each is along the each several part setting of the periphery of described air distribution plenum (7), the a plurality of described unit (8) of forming one group of described unit (8) is connected to each other on circuit, makes described group unit (8) can be used as a single electric air cleaner.

7. according to the described combination of claim 6, it is characterized in that described a plurality of filter units (8) are adjacent to each other, thereby form a continuous basically wall of filter element about the periphery of described air distribution plenum (7).

8. any one the described combination in requiring according to aforesaid right is characterized in that described air filter (13) comprises the polarization air filter.

9. any one the described combination in requiring according to aforesaid right is characterized in that described air filter (13) comprises chemical air filter.

10. basically as top description and with reference to the Fig. 1 and 2 in the schematic diagram here or a kind of combination of Fig. 3.