EP2586321A1 - Aerosol-Auflösung für eine automatische Rauchmaschine - Google Patents

Aerosol-Auflösung für eine automatische Rauchmaschine Download PDF

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Publication number
EP2586321A1
EP2586321A1 EP11008670.9A EP11008670A EP2586321A1 EP 2586321 A1 EP2586321 A1 EP 2586321A1 EP 11008670 A EP11008670 A EP 11008670A EP 2586321 A1 EP2586321 A1 EP 2586321A1
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EP
European Patent Office
Prior art keywords
channel
aerosol
stream
dilution
wall
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.)
Ceased
Application number
EP11008670.9A
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English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
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Philip Morris Products SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philip Morris Products SA filed Critical Philip Morris Products SA
Priority to EP11008670.9A priority Critical patent/EP2586321A1/de
Publication of EP2586321A1 publication Critical patent/EP2586321A1/de
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/80—Testing
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/90—Testing

Definitions

  • the present invention relates to an aerosol dilution device for automatic smoking machines, wherein an aerosol is diluted by a dilution gas, in particular air.
  • the invention further relates to a method for diluting a stream of aerosol with a stream of dilution gas, in particular air.
  • US 2010/0273246 A1 relates to such a smoking apparatus, which further comprises a diluting section, wherein a clean air supply section provides air to a concentration setting section to adjust the concentration of the smoke by means of dilution.
  • a clean air supply section provides air to a concentration setting section to adjust the concentration of the smoke by means of dilution.
  • the substrate can be in solid or liquid form comprising a inhalable substance to be vaporized, or in the form of tobacco which is heated but not burned.
  • the heating of the substrate may be accomplished through an electrical heating source, a gas burner or by other energy sources where the effect is to heat, not burn, the substrate.
  • the aerosol consists mainly of components with a high boiling temperature, and nucleation and condensation is usually completed in the cigarette.
  • the aerosol leaving the mouth piece of the cigarette is thermodynamically in equilibrium with its environment. Only components of high vapor pressure, such as aldehydes or similar, could evaporate after the dilution with fresh air. This thermodynamic equilibrium of the aerosol does not impact the smoking machine by leaving condensate after the aerosol leaves the mounthpiece of the smoking article.
  • the aerosol commonly leaves the mouth piece of the smoking article not completely condensed, and with a temperature higher than the ambient temperature.
  • the gas phase components of the aerosol tend to condensate on surfaces of the aerosol path downstream of the mouth piece in the smoking machine.
  • density and particle size found in the aerosols of the new types of smoking articles can be larger than what is found in conventional cigarette smoke. Larger particles are adsorbed by the surfaces of the aerosol path in smoking machines with a much higher probability than smaller ones.
  • an aerosol dilution device for automatic smoking machines comprising a first channel for an aerosol and a second channel for a dilution gas, in particular air, wherein the first channel and the second channel both release their downstream ends into a third channel, and the second channel is arranged around the first channel at the upstream side of the third channel.
  • the first channel and the second channel terminate at their downstream ends in a third channel.
  • the third channel is arranged very close to the smoking article, an indication that the length of the first channel is small. The dilution would therefore take place immediately downstream of the smoking article, preventing loss of aerosol particles.
  • Aerosol particles can be lost due to condensation, diffusion or impaction on the walls of the channel of a smoking machine or dilution device.
  • the loss of aerosol particles can be significantly reduced or prevented.
  • the dilution gas provided by the second channel forms a sheath of dilution gas in between the aerosol provided by the first channel and the wall of the third channel.
  • condensed components of the aerosol have the opportunity to nucleate or to contribute to the growing of already formed particles during dilution, while not coming into contact with the wall of the third channel.
  • the aerosol dilution device is adapted to establish at the upstream side of the third channel a flow of the dilution gas of the second channel at substantially the same speed as the flow of the aerosol of the first channel.
  • the flows of dilution gas and aerosol in the third channel are isokinetic. No turbulences or significant flow in a direction different than the main flow direction of the third channel will occur.
  • the aerosol will not come into contact with the wall of the third channel immediately which will provide the opportunity for the aerosol to nucleate.
  • the isokinetic flow of aerosol and dilution gas enables the establishment of a sheath of air formed by the dilution gas in between the aerosol and the wall of the third channel.
  • the speed of the flow of the aerosol in the first channel is not constant, as it follows a specified puff profile, which varies the speed of the flow over time.
  • the speed of the flow of the dilution gas provided by the second channel will be accordingly controlled.
  • the flow of dilution gas can be controlled according to the predefined profile regarding the flow of the aerosol in the first channel.
  • the flow of the aerosol in the first channel can be measured, and the flow of the dilution gas in the second channel can be controlled accordingly.
  • an outer wall of the first channel forms the inner wall of the second channel at their respective downstream ends.
  • the second channel has a ring-like cross-section at its downstream end.
  • the flow of dilution gas provided by the second channel can fully encompass the aerosol flow provided by the first channel.
  • the first channel would also have in particular a circular cross section.
  • the ring-like cross-section of the second channel enables the lowest possible contact area in between the aerosol flow and the dilution gas flow in the third channel, and thus enables to provide a large space in between the aerosol flow and the wall of the third channel with the lowest possible amount of dilution gas.
  • the first channel could be conically shaped at its downstream end. Additionally or alternatively, the first channel protrudes into the upstream end of the third channel.
  • the flow of the aerosol provided by the first channel is direct slightly towards the inside of the third channel, and a contact of the aerosol with the wall of the third channel can be reduced or prevented at the upstream part of the third channel due to the construction.
  • the third channel could be cylindrically shaped.
  • a high volume to cross-section ratio can be attained, with the wall of the third channel having a comparably small surface, such that adsorption and impaction of aerosol particles on the third wall is reduced.
  • a gap is provided in between the wall of the upstream end of the third channel and the wall of the downstream end of the first channel, wherein the gap is forming the downstream end of the second channel.
  • the aerosol dilution device comprises a chamber, into which the first channel protrudes from one side wherein an upstream portion of the second channel is formed in between the wall of the third channel and the chamber wall.
  • the first channel can be designed to be relatively short, such that not much loss of particles of the aerosol in the first channel occurs.
  • the wall of the first channel and the wall of the third channel may be formed by inserts in the chamber.
  • the chamber may be formed from one or two joined blocks of material. This allows, that the aerosol dilution device can be easily manufactured, as only the blocks of the chamber, and the inserts have to be assembled. Further, the geometry of the inserts can be adapted to different configurations for the aerosol dilution device, and, therefore, a versatile system is obtained.
  • the invention also relates to an automatic smoking machine, comprising an aerosol dilution device as specified above, which is arranged downstream of a receiving means for a smoking article.
  • the object of the invention is further attained by a method for diluting a stream of aerosol, in particular provided by a smoking article, with a stream of dilution gas, in particular air, wherein the stream of dilution gas forms a sheath in between a wall of a diluting section and the stream of the aerosol when the streams are joined.
  • a stream of dilution gas in particular air
  • the stream of dilution gas prevents contact of the particles of the aerosol with a wall of the diluting section, such that the particles remain in the flow, and are not lost through condensation, diffusion or impaction on the wall of the diluting section.
  • the particles are not adsorbed by the wall of the diluting section, they remain in the stream of aerosol and dilution gas, and a proper analysis of the diluted aerosol can be carried out. If particles of the aerosol would be lost, the content of the particles in the aerosol originally provided by the smoking articles could not be determined in a reliable manner, and therefore an analysis of the original aerosol would not be possible.
  • the stream of aerosol and the stream of dilution gas are flowing at substantially the same speed when they are joined.
  • the streams of the aerosol and the dilution gas are isokinetic. This reduces any turbulences or flow in other directions than the main flow direction, and thus prevents a quick mixing of dilution gas and the aerosol.
  • the aerosol can further stabilize until its particles come into contact with the wall of the diluting section. Thus, a loss of particles of the aerosol can be reduced or prevented.
  • the stream velocity of the aerosol is variable, and stream velocity of the dilution gas is controlled to correspond to the stream velocity of the aerosol.
  • stream velocity of the aerosol usually follows a puff profile, which simulates the puff of a consumer on a smoking article.
  • the streams of dilution gas and aerosol are flowing at substantially the same speed when they are joined.
  • the stream velocity of the dilution gas is controlled or adapted to correspond to the stream velocity of the aerosol. This prevents that significant flow in a direction different from the main flow direction in the diluting section is created.
  • the dilution of the aerosol takes place slowly, and the aerosol can stabilize, before its particles come into first contact with the wall of the diluting section.
  • the aerosol is provided by a smoking article which heats an evaporable material, and the aerosol comprises components which condense when diluted with air.
  • a smoking article which heats an evaporable material
  • the aerosol comprises components which condense when diluted with air.
  • the temperature of the dilution gas is controlled to be different from ambient temperature.
  • the temperature of the dilution gas can be controlled to be of the same temperature as the aerosol.
  • the temperature of the aerosol can be measured, and the temperature of the dilution gas can be accordingly adapted.
  • the temperature of the aerosol is generally known, and the temperature of the dilution gas is accordingly set.
  • an aerosol dilution device for automatic smoking machines comprising a first channel for an aerosol, in particular provided by a smoking article, and a second channel for a dilution gas, in particular air, wherein the first channel and the second channel terminate at their downstream ends in a third channel, wherein the aerosol dilution device is adapted to establish at the upstream side of the third channel a flow of the dilution gas of the second channel at substantially the same speed as the flow of the aerosol of the first channel.
  • the object of the invention is attained by a method for diluting a stream of aerosol, in particular provided by a smoking article, with a stream of dilution gas, in particular air, wherein the stream of aerosol and the stream of dilution gas are flowing at substantially the same speed when they are joined.
  • Figure 1 shows a cross-section of an embodiment of an aerosol dilution device according to the invention.
  • the aerosol dilution device comprises a main block 1 and an upstream block 2, which are fixed to each other.
  • the aerosol dilution device may be part of an automatic smoking machine, or may be connected to an automatic smoking machine.
  • a pump for the aerosol may be arranged upstream of the aerosol dilution device.
  • a conical, hollow first insert 3 is arranged in the main block 1, and protrudes into an inner chamber 4 formed in the main block 1.
  • the first insert 3 forms a first channel 5, through which an aerosol 10 is provided.
  • the flow direction of the aerosol 10 is indicated by the corresponding arrow.
  • the first insert 3 reduces its diameter in the flow direction of the aerosol 10.
  • the first channel 5 may further extend through the upstream block 2, wherein the upstream block 2 may be a receiving means for a smoking article. Alternatively, no upstream block 2 may be provided, but the aerosol 10 from a smoking article may be provided in a different manner to the first channel 5.
  • the length of the first channel 5 is preferred to be rather short, such that no or little loss of particles of the aerosol due to depositing on the surfaces of the first channel by condensation, diffusion or impaction occurs.
  • the aerosol is provided with a varying flow velocity according to a predetermined flow velocity. In particular, around 55 milliliters of aerosol are provided as one puff of a puff profile. The flow velocity of each puff quickly increases, then reaches its maximum, and subsequently decreases until the puff is finished. In between the puffs a predetermined pause with no or little aerosol flow is provided.
  • a second insert 6 protrudes into the chamber 4.
  • the second insert 6 has a generally cylindrical, hollow shape, and forms in its inside a third channel 7.
  • the second insert 6 protrudes further into the chamber 4 than the first insert 3.
  • the second insert 6 has a larger inner diameter than the outer diameter of the downstream end of the first insert 3.
  • the first insert 3 extends with its downstream end into the upstream end of the second insert 6.
  • the second insert 6 has a lower diameter, than the diameter of the generally cylindrically formed chamber 4, wherein the orientation of the cylindrical volume forming the chamber 4 and the hollow cylindrical volume of the second insert 6 is in the same direction, namely their longitudinal axes extend substantially along or parallel to each other.
  • a longitudinally extending volume with a substantially ring-like cross-section is provided in between the inner wall of the chamber 4 and the outer wall of the protruding part of the second insert 6, a longitudinally extending volume with a substantially ring-like cross-section is provided. This volume forms part of a second channel 8.
  • the upstream part of the second channel 8 is formed by a bore 4 or hollow cylindrical insert 9 extending from the outside of the main block 1 into the chamber 4 perpendicular to the flow direction of the aerosol in the first channel 5 or third channel 7. Then, the second channel 8 extends inside the chamber 4 and outside the second insert 6 in a direction opposite to the flow direction of aerosol in the third channel 7. At the side wall of the chamber 4 through which the first insert 3 is provided, the second channel 8 changes its direction to the opposite side. Then, the second channel 8 is generally defined by upstream inside wall of the second insert 6 and the outside of the first insert 3. Thus, at the downstream end of the first channel 5, which is the downstream end of the first insert 3, the second channel 8 has a ring-like cross-section.
  • a dilution gas in particular air
  • About 55 milliliters of dilution gas per puff are provided according to a flow velocity profile, which corresponds to the flow velocity profile of aerosol flow.
  • the flow of dilution gas is indicated by the arrow 20.
  • the area of the cross-section of the downstream end of the first channel 5 and of the downstream end of the second channel 8 are substantially the same.
  • the flow velocity of the dilution gas 20 and the aerosol 10 are substantially the same at the upstream end of the third channel 7.
  • the area of the cross-section of the downstream end of the first and second channels 5, 8 may not be the same, and, therefore, the volumes of aerosol 10 and dilution gas 20 per puff may be varied and not be the same.
  • the flow of dilution gas 20 is provided in between the wall of the third channel 7 formed by the second insert 6 and the aerosol flow 10.
  • the aerosol 10 does not come into contact with the wall of the third channel 7.
  • the aerosol stabilizes, in particular as not yet condensed components of the aerosol have the opportunity to nucleate or contribute to the growing of already formed particles.
  • the aerosol dilution device provides a way of processing unstabilized aerosols as provided by some new types of smoking articles.
  • the stream of aerosol 10 is provided through a first channel 5 to a central portion of an upstream end of a third channel 7.
  • a stream of dilution gas 20 is provided through a second channel 8, wherein the downstream end of the second channel 8 extends around the downstream end of the first channel 5.
  • a sheath of dilution gas 20 is provided around the aerosol 10 in the third channel 7.
  • the stream of aerosol 10 and the stream of dilution gas 20 are flowing at substantially the same speed at the upstream end of third channel 7, such that initial dilution can take place without contact of the particles of the aerosol 10 with the wall of the third channel 7.
  • the aerosol 10 is diluted by the dilution gas 20, and the diluted aerosol 30 leaves the third channel 7 at the downstream end of the third channel 7 in a stabilized state.
  • the stream velocity of the aerosol 10 and the dilution gas 20 may be synchronized.
  • the stream velocity of the aerosol and of the dilution gas may be controlled to correspond to a predetermined puff profile, which comprises pauses in between individual puffs.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP11008670.9A 2011-10-28 2011-10-28 Aerosol-Auflösung für eine automatische Rauchmaschine Ceased EP2586321A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11008670.9A EP2586321A1 (de) 2011-10-28 2011-10-28 Aerosol-Auflösung für eine automatische Rauchmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11008670.9A EP2586321A1 (de) 2011-10-28 2011-10-28 Aerosol-Auflösung für eine automatische Rauchmaschine

Publications (1)

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EP2586321A1 true EP2586321A1 (de) 2013-05-01

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EP11008670.9A Ceased EP2586321A1 (de) 2011-10-28 2011-10-28 Aerosol-Auflösung für eine automatische Rauchmaschine

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266874A (zh) * 2014-09-19 2015-01-07 国家烟草质量监督检验中心 带吸附管的直线型吸烟机捕集装置及其分析测试方法
CN106255426A (zh) * 2014-02-24 2016-12-21 莫林斯股份有限公司 用于保持吸烟制品的装置
WO2019174138A1 (zh) * 2018-03-16 2019-09-19 华中科技大学 一种无水冷高温气溶胶定量稀释取样探头
CN113415076A (zh) * 2021-06-08 2021-09-21 南方科技大学 一种气溶胶打印装置及打印方法
WO2022100367A1 (zh) * 2020-11-16 2022-05-19 深圳市吉迩科技有限公司 一种防止堵孔的双气道装置及气溶胶产生装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070116A1 (en) * 2001-03-02 2002-09-12 Parsons Advanced Technologies Inc. Assembly and method for mixing gases
DE10110156A1 (de) * 2001-03-02 2002-09-19 Ulrich Riebel Verfahren zur Verdünnung von Aerosolen bei der Messung der Aerosolkonzentration und Vorrichtung zur Durchführung des Verfahrens
EP1757921A2 (de) * 2005-08-25 2007-02-28 Msp Corporation Aerosol-Messung durch Verdünnung und Partikelzählen
US20100273246A1 (en) 2001-09-28 2010-10-28 Yasuo Fukano Whole smoke exposure apparatus
CN101923035A (zh) * 2009-11-27 2010-12-22 广东中烟工业有限责任公司 适用于不同焦油浓度卷烟侧流烟气气溶胶的采集及检测方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070116A1 (en) * 2001-03-02 2002-09-12 Parsons Advanced Technologies Inc. Assembly and method for mixing gases
DE10110156A1 (de) * 2001-03-02 2002-09-19 Ulrich Riebel Verfahren zur Verdünnung von Aerosolen bei der Messung der Aerosolkonzentration und Vorrichtung zur Durchführung des Verfahrens
US20100273246A1 (en) 2001-09-28 2010-10-28 Yasuo Fukano Whole smoke exposure apparatus
EP1757921A2 (de) * 2005-08-25 2007-02-28 Msp Corporation Aerosol-Messung durch Verdünnung und Partikelzählen
CN101923035A (zh) * 2009-11-27 2010-12-22 广东中烟工业有限责任公司 适用于不同焦油浓度卷烟侧流烟气气溶胶的采集及检测方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106255426A (zh) * 2014-02-24 2016-12-21 莫林斯股份有限公司 用于保持吸烟制品的装置
CN104266874A (zh) * 2014-09-19 2015-01-07 国家烟草质量监督检验中心 带吸附管的直线型吸烟机捕集装置及其分析测试方法
CN104266874B (zh) * 2014-09-19 2017-08-25 国家烟草质量监督检验中心 带吸附管的直线型吸烟机捕集装置及其分析测试方法
WO2019174138A1 (zh) * 2018-03-16 2019-09-19 华中科技大学 一种无水冷高温气溶胶定量稀释取样探头
US11085854B2 (en) * 2018-03-16 2021-08-10 Huazhong University Of Science And Technology Non-water-cooled high temperature aerosol quantitative dilution sampling probe
WO2022100367A1 (zh) * 2020-11-16 2022-05-19 深圳市吉迩科技有限公司 一种防止堵孔的双气道装置及气溶胶产生装置
CN113415076A (zh) * 2021-06-08 2021-09-21 南方科技大学 一种气溶胶打印装置及打印方法
CN113415076B (zh) * 2021-06-08 2022-09-20 南方科技大学 一种气溶胶打印装置及打印方法

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