CN109938401B - Aerosol generator - Google Patents

Abstract

The invention provides an aerosol generator, comprising: an aerosol-generating substrate that generates an inhalable aerosol, a filter tip coupled to the aerosol-generating substrate; the filter comprises a first adsorption unit filled with filter media and a second adsorption unit provided with an aerosol channel and an aerosol collision wall, wherein the first adsorption unit is positioned at an aerosol outlet end of the second adsorption unit; the aerosol flows along the aerosol passage and has a flowing trend along the circumferential direction of the second adsorption unit after colliding at least part of the aerosol collision wall. Can improve the filtering condition of the aerial fog and obtain the ideal aerial fog deposition effect.

Description

Aerosol generator

Technical Field

The invention relates to the field of tobacco, in particular to a cigarette product with a filter structure, and specifically relates to an aerosol generating device.

Background

At present, a wide variety of cigarette products are available on the market, and in general, a common cigarette comprises an aerosol generating substrate formed by tobacco shreds for generating composite aerosol and a filter tip for filtering out partial harmful substances in the composite aerosol. Conventional filters generally comprise two sections, and in order to improve the filtering effect, the industry researchers consider filling the filter strip of one of the sections with a high-efficiency adsorption material such as activated carbon, so that the arrangement can increase the filtering capacity to some extent, but can also enhance the overall absorption resistance of the filter while improving the filtering capacity, and the filtering capacity is always in proportion to the size of the filtering material, and the filter is not suitable for the market requirement to be set to be too long or too thick.

And the extra resistance to draw can also lead to the negative pressure that provides the suction to reduce, and then make the tobacco supply oxygen flow reduce, probably will cause insufficient combustion or combustion under the low oxygen state, and this kind of condition often leads to the increase of harmful substance's production such as carbon monoxide, tar etc..

On the other hand, those skilled in the art have also provided filter devices such as mouthpieces as extensions of smoking articles for secondary filtration of the aerosol. The product has the disadvantages that the product needs additional configuration and is carried about, and after being used for many times, the filter can be infected with more tar smell than common cigarettes. At the same time, the product also further increases the resistance to draw.

In view of transplanting the filtering and adsorbing structure of cigarette holder products into common cigarettes, for example, chinese patent (publication No. CN1747664A) discloses a transparent type cigarette with adsorbing filter tip, which improves the filter tip structure of the cigarette, adds a section of adsorbing filter tip, and puts the adsorbing filter tip between two sections of filter tip strips, thereby realizing the filtering of harmful substances such as tar and the visualization of the harmful substances.

The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention provides an aerosol generating device comprising: an aerosol-generating substrate that generates an inhalable aerosol, a filter tip coupled to the aerosol-generating substrate;

the filter comprises a first adsorption unit filled with filter media and a second adsorption unit provided with an aerosol channel and an aerosol collision wall, wherein the first adsorption unit is positioned at an aerosol outlet end of the second adsorption unit; the aerosol flows along the aerosol passage and has a flowing trend along the circumferential direction of the second adsorption unit after colliding at least part of the aerosol collision wall.

In a preferred embodiment, the at least part of the aerosol collision wall is blocked on the flow path of the aerosol flowing out of the aerosol passage, and the aerosol flows along two sides of the aerosol collision wall after colliding with the at least part of the aerosol collision wall.

In another implementation, the at least part of the aerosol collision wall is blocked on a flow path of the aerosol after flowing out of the aerosol channel, and the aerosol collides with the at least part of the aerosol collision wall and then flows along one side of the aerosol collision wall.

In a preferred embodiment, the second adsorption unit comprises a housing, the aerosol collision wall being formed on an inner side of the housing; the core body is at least partially arranged in the shell, a plurality of aerosol channels are formed on the core body, and a plurality of grooves communicated with the aerosol channels are formed on the surface of the core body; the aerosol flows through the aerosol passage and then enters the groove and collides with the aerosol collision wall.

In a preferred embodiment, adjacent grooves are separated by a spacer rib.

In a preferred embodiment, the extending direction of the groove is one or a combination of the following: the core body extends in the axial direction, extends in the circumferential direction, and extends in the spiral direction with the center of the core body as the axis.

In a preferred embodiment, the arrangement of the grooves and the spacing ribs is such that at least part of the aerosol collides with the aerosol collision wall before colliding with the side of the spacing ribs.

In a preferred embodiment, a flow guide protrusion is formed in the groove, and the flow guide protrusion is located on one side of the outlet of the aerosol channel, which is close to the first adsorption unit.

In a preferred embodiment, a gap is formed between the top of the protrusion and the inner wall of the housing.

In a preferred embodiment, the core comprises an upper portion, a lower portion and a ring portion; the surface of the core body is provided with a groove which penetrates through the upper surface and at least part of the lower surface; the inner wall of the ring part is matched with the outer wall of the upper part and closes the part of the groove penetrating through the surface of the upper part so as to form an aerosol channel; the spacing rib is arranged on the surface of the lower part and is abutted against the ring part.

In a preferred embodiment, further comprising an outer wrap surrounding the aerosol-generating substrate and the filter, the outer wrap being at least partially transparent or substantially transparent forming the aerosol impingement wall; the overwrap has a viewable port located outside the aerosol collision wall.

This redirection facilitates the formation (from an external viewing perspective) of flake-like deposits, which, if radial flow, would be line-like deposits, which would be insignificant. In addition, if the gas fog flows axially after collision, irregular turbulent flow is formed, the gas fog is controlled to flow along the circumferential flow trend, the gas fog is uniformly dispersed, the first adsorption unit filter medium positioned at the downstream is fully utilized, and local saturation is avoided.

Through control aerial fog deposit, let aerial fog such as the harmful substance in the flue gas aerial fog collide the wall and form flaky deposit on the inside wall of transparent shell, can reduce the content of harmful substance such as tar in the flue gas effectively to, reduce harmful substance content through aerial fog deposit rather than adsorption filtration's mode, can not increase the suction resistance basically.

The principle of aerial fog deposit is mainly let aerial fog collide the aerial fog collision wall regularly, and the material that has viscosity in the aerial fog will adhere and deposit at aerial fog collision wall gradually, and the effect of temperature difference can promote aerial fog deposit at wall structure, perhaps through the change of control aerial fog velocity of flow, lets aerial fog and wall structure fully contact when aerial fog speed reduces, also can take place the deposit.

Because the cigarette is disposable product, the content of harmful substance such as tar that can be got rid of in the aerial fog deposition area that realizes the harmful substance filtration is limited, so need let whole aerial fog deposition area fully play a role.

The aerial fog after the second adsorption unit keeps even, because the inhomogeneous aerial fog that flows into the second adsorption unit is difficult to flow equalize when carrying out harmful substance deposit, at the condition of setting up first adsorption unit for example the at least part of traditional filter tip in the low reaches of second adsorption unit, also be favorable to traditional filter tip structure to exert a fully uniformly, this will be favorable to shortening the extension length of filter tip, can provide other parts that a cigarette props up for example the sufficient extension length of aerial fog emergence matrix from this, guarantee the aerial fog suction volume of more sufficient single cigarette.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an aerosol-generating device according to an embodiment of the invention.

Fig. 2 is a schematic internal structural view of an aerosol-generating device according to an embodiment of the present invention, which is cut away from a second adsorption unit.

Fig. 3 is a schematic partial sectional view of a second adsorption unit in an aerosol-generating device according to an embodiment of the invention.

Fig. 4 is a schematic diagram illustrating an external structure of a second adsorption unit in an aerosol-generating device according to another embodiment of the present invention.

Fig. 5 is a schematic view illustrating the flow paths of the aerosol and the dilution air in the second adsorption unit of the aerosol-generating device according to still another embodiment of the present invention.

Fig. 6 is a schematic diagram illustrating the flow trend of the aerosol in the second adsorption unit of the aerosol-generating device after flowing out of the aerosol passage of the filter element according to still another embodiment of the present invention.

Figure 7 is a schematic diagram showing a portion of a wick in an aerosol-generating device according to yet another embodiment of the invention.

Figure 8 is a schematic view of the shape of the ring of the wick in an aerosol-generating device according to a further embodiment of the invention.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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.

In one embodiment, the design idea and implementation of one aspect of the aerosol-generating device according to the present invention are disclosed, and as shown in fig. 1 to 3, the aerosol-generating device 100 includes:

an aerosol-generating substrate 110 that generates an inhalable aerosol, a filter interfacing with the aerosol-generating substrate 110;

the filter comprises a first adsorption unit 120 filled with a filter medium and a second adsorption unit 130 having an aerosol deposition region Q, wherein the second adsorption unit comprises a transparent shell 1301, and at least part of the aerosol deposition region is located on part of the inner side wall of the transparent shell. That is, the aerosol deposits P are distributed on a portion of the inner wall of the transparent shell.

Through control aerial fog deposit, let the harmful substance in aerial fog such as the flue gas form flaky deposit at transparent shell's inside wall, can reduce the content of harmful substance such as tar in the flue gas effectively to, reduce harmful substance content through aerial fog deposit rather than adsorption filtration's mode, can not increase the suction resistance basically.

The principle of aerosol deposition is mainly that aerosol regularly collides with an aerosol deposition area such as a wall structure, and then is deposited on the wall structure under the action of temperature difference, or the aerosol is fully contacted with the wall structure while the aerosol speed is reduced by controlling the change of the aerosol flow speed, so that the time for the aerosol to stay in the aerosol deposition area is prolonged, and sticky liquid particles in the aerosol are deposited.

It can be seen from this that the temperature difference is very important for the deposit of noxious substances in the aerosol, and in the filter, transparent shell is located the radial outside most of aerosol generating device such as the cigarette, and the heat dissipation condition is best, and undoubtedly the temperature is also minimum, restricts the aerosol deposit region at the inside wall of transparent shell, is more favorable to the deposit of noxious substances.

Furthermore, it is advantageous to have the deposited harmful substances clearly visible, so that it is most suitable to form the deposit in the form of a sheet for the observer, for example the smoker of the tobacco rod, generally at an angle perpendicular to the axis of the tobacco rod or slightly at an angle to the axis of the tobacco rod, in any case if the deposit of aerosol is defined in a plane perpendicular to the axis of the tobacco rod, the pattern of deposit observed externally is likely to be a line or a very narrow trace, and the desired visualization effect is not obtained. The deposition pattern disposed on the inner side wall of the transparent housing will inevitably form a sheet-like deposition pattern for the viewer.

Referring to the drawings, the second adsorption unit 130 comprises a core body 1302 arranged inside a housing 1301, wherein the core body 1302 is formed with an aerosol passage 13021, and the aerosol reaches an aerosol deposition area Q after flowing through the aerosol passage 13021.

The core body with the aerosol channel is arranged on the second adsorption unit, the aerosol flows into the second adsorption unit after being generated, the core body structure is arranged to control the flowing direction and trend of the aerosol, the aerosol deposition position and range can be controlled, the aerosol deposition position and range can be deposited on the inner side wall of the transparent shell through the deposition mode instead of directly flowing into the shell, meanwhile, the built-in core body is arranged to facilitate the assembly of the structure, or the industrial mass production application, in order to meet the requirement of mass production, the structural complexity of each component can be expected to be reduced as much as possible, the aerosol channel arranged in the transparent shell through the assembly mode is provided, compared with the method for manufacturing the aerosol channel on the transparent shell body, the aerosol channel is obviously simpler, the structure of the transparent shell can be simpler, and the development cost of a mold can be reduced, the stability of structure is improved equally, as long as form the cavity of holding core on transparent shell and can realize above-mentioned scheme, obviously, such design can guarantee that transparent shell's production has enough high yields.

With reference to the figures, a gap 13022 between the outer wall of the core 1302 and the inner side wall of the transparent shell 1301 forms an extension of the aerosol channel, and an aerosol deposition area Q is formed at the inner side wall of the transparent shell at the gap 13022.

And a gap, preferably a gap with uniform thickness, is formed between the core body and the transparent shell, and the aerosol rapidly spreads and fills the gap after flowing out of the aerosol passage, and then deposits are formed at the gap. The method is a convenient means for controlling the deposition position and range, and can control the range of aerosol spread as long as the range of gap formation is controlled, so that the visual range of aerosol deposition can be simply adjusted according to different design intents.

In addition, the implementation of the means mainly depends on the processing of the outer wall of the core body, one part of the outer wall of the core body can be processed to be attached to the inner side wall of the transparent shell, and the other part of the outer wall of the core body forms a gap with the inner side wall of the transparent shell, so that the control intention can be realized. The inner side wall of the transparent shell does not need to be additionally machined, and for a structure with a small size, the machining difficulty of the outer part of the structure is far lower than that of the inner part of the structure, and the arrangement is also beneficial to industrial application. Obviously, due to the requirement for portability of aerosol generating devices such as cigarettes, low temperature non-combustible cigarettes, and the like, the design size of the products is small, and it is necessary to avoid secondary processing or fine processing of the interior of the structure.

Referring to the figures, aerosol channel 13021 has a bend through which the aerosol flows axially along the core 1302 and through which the aerosol flows radially or in a direction approaching the transparent shell 1301 along the core 1302.

Through the bending of setting up the aerial fog passageway, change the flow direction when control aerial fog flows through the aerial fog passageway, finally in order to flow to transparent shell's inside wall. In combination with the aforementioned aerosol deposition principle, upon aerosol ingress, the aerosol flows axially along the core, i.e. axially throughout the second adsorbent unit, due to the need for reduced resistance, this axial extension also being consistent with the flow tendency of the aerosol being drawn into the first and second adsorbent units after generation from the aerosol-generating substrate. Then the flow direction is changed at the position where the deposit is required to be formed, when the deposit flows through the bent part, the deposit is also generated because the deposit collides with the inner side wall of the aerosol passage due to the change of direction, these deposits are relatively small because the flow rate does not change substantially, the inner side walls of the aerosol passage formed inside the wick do not have a sufficient temperature difference with the aerosol, these small deposits contribute to a reduction in the content of harmful substances in the aerosol, and on the other hand, too much deposition of the aerosol in the aerosol passage is undesirable for the stability requirements of the quality of the inhalation, which firstly makes it difficult to visualize the deposition, secondly, if excessive deposition occurs, it will affect the flow field of the aerosol in the aerosol channel and, during the process of inhalation, the aerosol initially drawn and the aerosol finally drawn may have a certain difference in taste, which affects the user experience.

The area of aerosol deposition is mainly distributed on the inner side wall of the transparent shell by the following method: change the aerial fog flow direction through the kink, then let the inside wall striking of aerial fog perpendicular to transparent shell, under the impact effect, the flow velocity who receives the difference in temperature influence and aerial fog simultaneously tends to gently behind outflow aerial fog passageway, forms the formula deposit that tends to with striking department and striking department outdiffusion's scope. Or flow in other directions onto the inner side wall of the transparent casing, for example in a direction tangential to the inner side wall of the transparent casing, and then flow along the inner side wall, under the influence of a temperature difference, with a simultaneous reduction in the flow velocity, forming a zonal deposition on the inner side wall of the transparent casing.

With reference to the figures, gap 13022 provides an aerosol with a flow cross-section that is no smaller than the flow cross-section at the outlet of aerosol channel 13021.

In order to deposit the mist, it is desirable that the flow speed of the mist be reduced and the mist flow be gentle when the mist flows into the mist deposition region. Controlling the flow cross-section is a relatively easy way to achieve. In addition, the flow velocity of the gas mist is reduced in the gas mist deposition area, the stay time of the gas mist in the gas mist deposition area can be prolonged, on one hand, enough deposition time is provided, the content of harmful substances is sufficiently reduced, on the other hand, the gas mist stays in the area for a long time, the temperature of the gas mist can be promoted to be reduced, namely, a certain cooling function is realized through the second adsorption unit, the cooling of the gas mist is also necessary for improving the mouth feeling of smoking, if the cooling is carried out in the area, the length of a cooling structure of other parts of a gas mist generating device such as a cigarette and a heating non-combustible cigarette can be reduced, and the miniaturization of products is facilitated.

Preferably, the area of the flow cross-section of the gap provided to the gas mist is more than 2 times the area of the flow cross-section at the outlet of the gas mist passage. The change in area of the cross-section may be gradual or step-wise.

Referring to the drawings, the aerosol passage 13021 meets the condition that the aerosol flows out of the outlet of the aerosol passage 13021 and at least partially collides with the aerosol deposition area Q in a flow direction perpendicular or approximately perpendicular to the inner side wall of the transparent shell 1301.

When the aerial fog collides with the aerial fog deposition area, the flowing inertia force of the aerial fog can play a role, condensed liquid drops in the aerial fog collide with the aerial fog deposition area under the action of the inertia force and collide with the collision wall in the vertical direction, the inertia force can play the maximum role, and the collision driven by the inertia force is favorable for the aerial fog deposition because the condensed liquid drops in the aerial fog generally have certain viscosity and can be directly adhered to the collision position through collision. This perpendicular collision will also drive the aerosol to escape rapidly, contacting the aerosol deposition area to a greater extent irregularly but generally uniformly, so that deposition occurs under the effect of temperature differences.

Referring to the drawings, straight spacing ribs 13023 for spacing the gaps 13022 into a plurality of partitions are formed on the outer side of the core body 1302, and the outlet of each aerosol channel 13021 is positioned between two adjacent straight spacing ribs 13023.

In the implementation mode that the aerial fog collides with the aerial fog deposition area in a vertical flow direction, the area forming the gap is favorably divided, so that the areas generating the aerial fog deposition are separated, and the mutual interference and influence of the aerial fog flowing out from the outlets of the adjacent aerial fog channels in the aerial fog deposition process are eliminated. Meanwhile, the dissipation and deposition range of the aerial fog is controlled by the interval, the visible degree of the aerial fog deposition is improved along with the enhancement of the deposition thickness, and the dissipation and deposition range is controlled, so that the increase of the aerial fog deposition thickness under the same condition is facilitated. Meanwhile, the spacing ribs can also serve as a supporting structure for supporting the core body, so that the core body and the transparent shell are relatively stable, and looseness caused by shaking when the product is carried is avoided.

Preferably, a limiting rib is formed on the core body between the outlet of the gas mist channel and the end of the core body close to the outlet of the second adsorption unit, and the top of the limiting rib is attached to the transparent shell or forms a gap. The spacing ribs and the limiting ribs are arranged along the axial extension of the core body. This spacing muscle further separates the clearance, mainly plays the effect of flow equalizing, and spacing muscle forms between adjacent interval muscle to the distance between preferred spacing muscle and two interval muscle is unanimous. Aerial fog is more disorderly state after the deposit, through the arrangement of interval muscle and spacing muscle, state when can letting aerial fog follow the export of second adsorption unit and flow tends to evenly, can get into low reaches with more even state after the aerial fog flows. When first adsorption unit sets up second adsorption unit low reaches, this kind of setting then seems especially important, and the filter media in the first adsorption unit can make full use of, and when avoiding aerial fog to get into first adsorption unit, the even degree of circumference concentration is low excessively, leads to some filter media to adsorb the saturation, and reduces the effect of filtration adsorption.

In an embodiment not shown in the figures, the aerosol passage is such that the aerosol at least partially collides with the aerosol deposition area in a tangential or approximately tangential flow direction from the outlet of the aerosol passage.

Another kind lets aerial fog deposit the regional implementation of aerial fog deposit that is located transparent shell inside wall, let aerial fog behind the aerial fog passageway of flowing through, in order to collide aerial fog deposit the region with the tangent or approximate tangent flow direction of transparent shell inside wall, such setting is that the inertia force through aerial fog flows along the inside wall under with the suction effect, then the circular arc shape of cooperation transparent shell inside wall, aerial fog will receive centrifugal force effect and press close to the inside wall when flowing, cooperation difference in temperature and velocity of flow regulation means this moment, aerial fog will take place the deposit at transparent shell's inside wall, this kind of implementation will make the deposit of aerial fog more even.

In the embodiment not shown in the figure, the core body is provided with arc-shaped spacing ribs which divide the gap into a plurality of spiral channels on the outer side, and each aerosol channel outlet is positioned between two adjacent arc-shaped spacing ribs.

To the aforesaid let aerial fog collide aerial fog deposition area's implementation mode with tangent or approximate tangent flow direction of transparent shell inside wall, the preferred cooperation mode is the helical passage who forms cooperation aerial fog flow direction between the outer wall of core and transparent shell's inside wall, helical passage extends to the export of second adsorption unit around the core, make aerial fog deposition distribute evenly, and the direction of helical mode, let flow direction range of change more mild, reduce the change of wide-angle flow direction, thereby reduce the drive power loss of aerial fog flow in-process, reduce whole second adsorption unit's resistance to suction.

In addition, the aerosol-generating device 100 comprises an overwrap (not shown) surrounding the aerosol-generating substrate 110 and the filter, the overwrap having a viewable opening in the aerosol-deposition region.

In order to fix aerosol generation substrate and filter tip, the conventional method of adopting is to wrap aerosol generation substrate and filter tip with the overcladding, in order to ensure visual effect, choose to set up visual mouth at the overcladding, visual mouth can be the opening that sets up at the overcladding, also can be the local transparent material of setting at the overcladding, see through the shell that can observe transparent shell in visual mouth, and then observe the aerosol deposition that forms in the aerosol deposition region, visual mouth's scope can cover the whole scope at aerosol deposition region place completely, also can cover the partial range at aerosol deposition region place, can also set up the shape of visual mouth as required, realize visualization and the standardization of visual result.

In another embodiment, the design idea and implementation of another aspect of the aerosol-generating device provided by the present invention are disclosed, and as shown in fig. 4 to 5, the structure of the aerosol-generating device is substantially the same as that of the previous embodiment, and includes:

the filter comprises an aerosol generating substrate capable of generating inhalable aerosol and a filter tip connected with the aerosol generating substrate;

the filter includes a first adsorption unit filled with a filter medium and a second adsorption unit 230 having an aerosol deposition region, wherein the second adsorption unit 230 includes: an aerosol-cooling mixing channel defined by the partial housing 2301; a flow equalizing structure 2303 disposed at an inlet end of the aerosol cooling mixing channel; the aerosol deposition area is arranged at the outlet end of the aerosol cooling mixing channel; at least one dilution air inlet 2304 communicating the interior and exterior of the aerosol-cooling mixing passage radially of the aerosol-cooling mixing passage.

Because the cigarette is disposable product, the content of harmful substance such as tar that can be got rid of in the aerial fog deposition area that realizes the harmful substance filtration is limited, so need let whole aerial fog deposition area fully play a role. Before getting into the second adsorption element, flow equalize and cool off earlier, can make aerial fog get into the second adsorption element uniformly to through the cooling, can make aerial fog change the deposit, in addition, can let dilution air and aerial fog mix uniformly, promote the taste of suction, avoid having "the air of inhaling feel".

Finally, still be favorable to the aerial fog after the second adsorption unit to keep even, because the aerial fog of inhomogeneous inflow second adsorption unit is difficult to flow equalize when carrying out harmful substance deposit, under the condition with first adsorption unit for example at least part setting of traditional filter tip in the low reaches of second adsorption unit, be favorable to traditional filter tip structure to exert a function uniformly fully, this will be favorable to shortening the length of filter tip, avoids making cigarette too long.

With the attached drawings, the gas fog cooling mixing channel is columnar.

With the sections extending in the axial direction having the same cross-section or a gradual change in cross-section. The cross-sectional variation in the axial direction does not exceed 5%. The shape of the column is preferably a cylinder or other shapes with smooth curved inner walls, the cross section is basically unchanged, the airflow tends to be stable in the flowing process, the length of the channel can be set through a flow field simulation result, for example, the flow field can be smoothly simulated, and the minimum length of the flow field basically reaches the stable length under the action of normal negative pressure is determined;

the temperature change is confirmed by laboratory experimental data, the longer the extension length of the gas spray cooling mixing channel is, the more the temperature is reduced, the more the gas spray cooling mixing channel is fully deposited after entering a filter element serving as a filter medium, the tar content is reduced, and the mixing is more uniform.

In an embodiment not shown in the figures, a flow equalization member is arranged in the aerosol-cooling mixing channel, the flow equalization member being arranged between the dilution air inlet and the outlet end of the aerosol-cooling mixing channel.

In order to further improve the flow equalizing effect of the aerial fog in the aerial fog cooling channel, the preferred realization mode is to arrange the flow equalizing piece in the aerial fog cooling channel, and compared with the mode of improving the uniformity degree by naturally flowing the aerial fog for a certain distance, the flow equalizing piece has more efficient flow equalizing effect. The optional interior orifice plate that sets up aerial fog cooling channel of component mode that flow equalizes, the equal portion of trompil of orifice plate to the trompil direction is unanimous with aerial fog cooling channel's axial. Or the flow equalizing piece can also be a flow guide plate or a flow guide rib formed on the inner wall of the gas fog cooling channel, and the extending direction of the flow guide plate or the flow guide rib is consistent with the axial direction of the gas fog cooling channel, so that the flow field of the gas fog is arranged and tends to be uniform. The adoption of the flow equalizing piece can shorten the necessary extension length of the aerosol cooling channel to a certain extent.

The above-mentioned construction modes are all formed by adopting easy-to-install or easy-to-form mode so as to meet the requirements of industrial application. For example, the orifice plate is plugged into the aerosol cooling channel, and then the support ribs formed on the side wall limit the tendency of the orifice plate to move along the axial direction of the aerosol cooling channel, and the guide plate or the guide ribs can be formed on the inner wall of the aerosol cooling channel in an integrated forming mode. The extension direction of the flow guide plate or the flow guide rib is consistent with the axial direction of the aerial fog cooling channel, and the extension direction can be realized by only forming a straight groove on the die. In addition, because of structural strength consideration, can also increase the bulk strength of structure through guide plate or water conservancy diversion muscle with aerial fog cooling channel integrated into one piece, in this structure constitutes, because the additional strengthening of guide plate and water conservancy diversion muscle can allow the more frivolous of the shell structure preparation that will prescribe a limit to aerial fog cooling channel.

In particular embodiments, the orifice plate and the baffle or the flow-directing ribs may be combined and disposed together in the aerosol-cooling passage.

Preferably, the flow equalizing piece is close to the dilution air inlet in the axial direction of the aerosol cooling channel, and in a downstream area close to the dilution air inlet, due to the fact that dilution air enters, obvious turbulence is formed.

Preferably, the length of the aerosol-cooling mixing channel is 7mm to 14 mm.

As mentioned above, in order to ensure the flow equalization effect, the length of the aerosol-cooling mixing channel should be sufficient, and ideally should be not less than 7mm, and if the length is too large, the suction resistance will be increased, and the length of the aerosol-generating device such as cigarette will be increased as a whole, so that the length should ideally be not more than 14 mm. The preferred length range is 9mm to 12mm, more preferably the length is selectable from 9.5mm, 10mm, 10.5mm, 11 mm.

With reference to the drawings, the flow equalizing structure 2303 includes a plurality of channels of the same size and shape, and the channels are uniformly distributed on a plane perpendicular to the axis of the aerosol cooling mixing channel.

The flow equalizing structure is arranged at the inlet of the aerial fog cooling channel, namely aerial fog is required to flow into the aerial fog cooling channel in a relatively uniform state, the specific implementation measure is to provide uniform pore channels to promote the aerial fog flow field to have uniform vectors with relatively consistent directions, and the pore channel structure is one of the conventional means for flow field homogenization treatment.

In particular, the flow equalizing structure is a grid or an orifice plate as illustrated in the figure. The range of the open porosity is preferably 45% to 80%.

The thickness of the flow equalizing structure along the aerosol flowing direction is 0.4mm-0.8 mm.

The structure of the flow equalizing structure may be a grid structure or an orifice structure, and the ranges of the aperture ratio and the thickness dimension are the more ideal parameter ranges confirmed by the inventor. Of course, adopt the size outside the scope of certain deviation also can obtain certain effect of flow equalizing, in essence, let aerial fog flow for the passageway through a plurality of equipartitions by single passageway change, just can let aerial fog even degree improve to a certain extent. In an ideal range, a more ideal current equalizing effect can be obtained.

In addition, the ratio of the distance between the dilution air inlet 2304 and the inlet end of the mist cooling mixing channel to the distance between the dilution air inlet 2304 and the outlet end of the mist cooling mixing channel is 1: 2-20.

In order to reserve a sufficient cooling mixing length for the cooling mixing of the dilution air with the aerosol, the dilution air inlet is preferably arranged closer to the inlet end of the aerosol-cooling mixing channel, which can be achieved by providing the ratio of the aforementioned distances. Within the range, the uniform cooling effect of the aerosol and the dilution air is ideal, and the main embodiment is that the smoking taste is better, and the taste of the inhaled air is basically not generated. And from the observation and detection of the second adsorption unit, after the whole cigarette is sucked, even after each mouth is sucked, the aerosol deposition is uniformly distributed, and the deposition amount in each aerosol deposition area is also nearly uniform.

Referring to the figures, dilution air inlet 2304 is an opening that extends in a direction perpendicular to the axial direction of the aerosol-cooling mixing passage.

As a construction mode of a dilution air inlet, an opening which is vertical to the axial direction of the aerial fog cooling mixing channel is directly formed, dilution air enters the aerial fog cooling mixing channel at a position which is consistent with the inlet end of the aerial fog cooling mixing channel, and a generated mixed flow field is regular and is easier to arrange into a flow equalizing flow field. And the opening is directly formed, and the opening can be formed through a simple machining mode, so that the process complexity can be reduced.

In an embodiment not illustrated in the drawings, the dilution air inlet is a plurality of air inlet holes distributed uniformly in the circumferential direction of the mist-cooling mixing channel.

As a dilution air inlet's constitutional mode, the setting lets the dilution air follow during aerial fog cooling mixing passage evenly gets into aerial fog cooling mixing passage along circumference along the equal inlet port of aerial fog cooling mixing passage circumference, that is to say, also flow equalize the processing dilution air, more do benefit to the homogeneous mixing of aerial fog and dilution air, and because the equipartition will make the dilution air that gets into through each inlet port in circumference form the convection current, offset the part along the radial fluid vector of aerial fog cooling mixing passage, be favorable to the formation in the low reaches flow field of flow equalizing.

As shown, the second adsorption unit 230 includes a housing 2301 defining an aerosol-cooling mixing channel, a core 2302 at least partially disposed inside the housing, the core 2302 being formed with a plurality of aerosol channels, through which the aerosol flows to reach an aerosol deposition region; the inlets of the gas fog channels are uniformly distributed on the end surface of the outlet end of the gas fog cooling mixing channel.

Because the core shutoff is in the one end of shell, the exit end of aerial fog cooling mixing channel ends in the core sets up the tip of aerial fog passageway entry, aerial fog is through flow equalizing treatment back, also gets into through the entry of the aerial fog passageway of equipartition, the homogeneity in continuation flow field makes the flow equalizing treatment of upper reaches act on subsequent aerial fog deposition stage, the aerial fog deposition is realized to core cooperation shell, the flow equalizing of upper reaches lets aerial fog be in roughly flow field equipartition state before getting into the aerial fog passageway, and the equipartition of aerial fog passageway entry then lets each entry get into aerial fog volume roughly the same.

In addition, in the aerosol generating device, referring to the structure illustrated in fig. 1, the first adsorption unit is at least partially disposed downstream of the second adsorption unit, and outlets of the aerosol channels are uniformly distributed at a joint of the second adsorption unit and the first adsorption unit.

Aerial fog carries out aerial fog deposit at the second adsorption unit and gets into first adsorption unit after, and first adsorption unit mainly carries out traditional absorption formula to aerial fog through filter media and purifies, lets aerial fog get into first adsorption unit with the homogeneous flow field, lets the filter media in the first adsorption unit also can be used for filtering the absorption fully. By matching with the scheme, the arrangement further continues the uniformity of the flow field. Therefore, the filter medium in the first adsorption unit can be supported to ensure ideal filtering and adsorption effects by a short extension length, and the extension length increased by adding the second adsorption unit compared with the traditional cigarette is partially offset.

In addition, the aerosol-generating device further comprises an overwrap surrounding the aerosol-generating substrate and the filter, the overwrap having a viewable opening located in the aerosol deposition area.

In order to fix aerosol generation substrate and filter tip, the conventional method of adopting is to wrap aerosol generation substrate and filter tip with the overcladding, in order to ensure visual effect, choose to set up visual mouth at the overcladding, visual mouth can be the opening that sets up at the overcladding, also can be the local transparent material of setting at the overcladding, see through the shell that can observe transparent shell in visual mouth, and then observe the aerosol deposition that forms in the aerosol deposition region, visual mouth's scope can cover the whole scope at aerosol deposition region place completely, also can cover the partial range at aerosol deposition region place, can also set up the shape of visual mouth as required, realize visualization and the standardization of visual result. The aforesaid aerial fog mean of flow equalizing of cooperation can see through the aerial fog deposit that can see into the visual mouth and evenly form in aerial fog deposit region, and even deposit guarantees that the person of sucking can both clearly observe obviously the deposit in all directions, obtains good visual effect.

In another embodiment, the design idea and implementation of another aspect of the aerosol-generating device according to the present invention are disclosed, and as shown in fig. 6 to 8, the structure of the aerosol-generating device is substantially the same as that of the foregoing embodiment, and includes:

the filter comprises an aerosol generating substrate capable of generating inhalable aerosol and a filter tip connected with the aerosol generating substrate;

the filter comprises a first adsorption unit filled with filter media and a second adsorption unit 330 provided with an aerosol channel and an aerosol collision wall, wherein the first adsorption unit is positioned at the aerosol outlet end of the second adsorption unit 330;

in conjunction with fig. 6 (see also fig. 5), the arrows indicate that the aerosol flows along the aerosol passage and collides with at least a part of the aerosol collision wall, and then has a flow trend along the circumferential direction of the second adsorption unit.

This redirection facilitates the formation (from an external viewing perspective) of flake-like deposits, which, if radial flow, would be line-like deposits, which would be insignificant. In addition, if the gas fog flows axially after collision, irregular turbulent flow is formed, the gas fog is controlled to flow along the circumferential flow trend, the gas fog is uniformly dispersed, the first adsorption unit filter medium positioned at the downstream is fully utilized, and local saturation is avoided.

Through control aerial fog deposit, let aerial fog such as the harmful substance in the flue gas aerial fog collide the wall and form flaky deposit on the inside wall of transparent shell, can reduce the content of harmful substance such as tar in the flue gas effectively to, reduce harmful substance content through aerial fog deposit rather than adsorption filtration's mode, can not increase the suction resistance basically.

The principle of aerial fog deposit is mainly let aerial fog collide the aerial fog collision wall regularly, and the material that has viscosity in the aerial fog will adhere and deposit at aerial fog collision wall gradually, and the effect of temperature difference can promote aerial fog deposit at wall structure, perhaps through the change of control aerial fog velocity of flow, lets aerial fog and wall structure fully contact when aerial fog speed reduces, also can take place the deposit.

Because the cigarette is disposable product, the content of harmful substance such as tar that can be got rid of in the aerial fog deposition area that realizes the harmful substance filtration is limited, so need let whole aerial fog deposition area fully play a role.

The aerial fog after the second adsorption unit keeps even, because the inhomogeneous aerial fog that flows into the second adsorption unit is difficult to flow equalize when carrying out harmful substance deposit, at the condition of setting up first adsorption unit for example the at least part of traditional filter tip in the low reaches of second adsorption unit, also be favorable to traditional filter tip structure to exert a fully uniformly, this will be favorable to shortening the extension length of filter tip, can provide other parts that a cigarette props up for example the sufficient extension length of aerial fog emergence matrix from this, guarantee the aerial fog suction volume of more sufficient single cigarette.

With the attached drawings, at least part of the aerosol collision wall is blocked on the flow path of the aerosol flowing out of the aerosol passage, and the aerosol collides with at least part of the aerosol collision wall and then flows along two sides of the aerosol collision wall.

The more beneficial cooperation mode of setting up lets the aerial fog after the aerial fog collision takes place along the both sides flow of aerial fog collision wall, enlarges the contact range of aerial fog and aerial fog collision wall in circumference to divide into two strands of aerial fog, play the effect of flow field homogenization.

In another embodiment, not shown, at least a portion of the aerosol collision wall is blocked from the flow path of the aerosol after exiting the aerosol passage, and the aerosol collides with at least a portion of the aerosol collision wall and flows along a side of the aerosol collision wall.

With reference to the drawings, the second adsorption unit includes a housing 3301, and an aerosol collision wall is formed on the inner side of the housing 3301; and a core 3302 at least partially disposed inside the housing, the core 3302 being inserted through an opening in a side of the housing and being stopped by a protrusion 3307 formed on an inner wall of the housing. The core 3302 is formed with several aerosol channels, the core 3302 surface is formed with several grooves connected with the aerosol channels; the aerosol flows through the aerosol passage and then enters the groove and collides with the aerosol collision wall.

The aerosol collision wall is arranged, so that aerosol deposition can not occur in the aerosol channel basically in the collision deposition process, the overall section size of each part of the aerosol channel can be ensured not to change basically, and the suction resistance of each suction in the suction process is ensured to be basically consistent. The stability of the flow field of the aerial fog can be ensured.

And by the above-mentioned aerial fog channel's constitution, through setting up the core body with aerial fog channel in the second adsorption unit, the aerial fog flows into the second adsorption unit after producing, the structural purpose of setting up the core body is to control the direction and trend that the aerial fog flows, make the position and the scope of aerial fog deposit controllable become possible, but not deposit in the transparent outer cover inside wall through the aforesaid deposition mode after flowing into the body directly, meanwhile, set up the built-in core body and be favorable to the assembly of the structure too, or be favorable to using in the industrialization volume production, in order to cooperate with the demand of mass production, it is expected to reduce the structure complexity of each component as far as possible, provide the aerial fog channel in the transparent outer cover through the assembly mode, than produce the aerial fog channel on the transparent outer cover body, obviously more simple, can make the structure of the transparent outer cover itself simpler, reduce mould development cost, improve the stability of structure equally, as long as form the cavity of holding core on transparent shell and can realize above-mentioned scheme, obviously, the production that transparent shell can be guaranteed to such design has the yields of sufficient height.

In addition, a gap, preferably a gap with uniform thickness, is formed between the core body and the transparent shell through the groove structure, and after the aerosol flows out from the aerosol passage, the aerosol rapidly spreads and is filled into the gap, and then deposition is formed at the gap. The method is a convenient means for controlling the deposition position and range, and can control the range of aerosol spread as long as the range of gap formation is controlled, so that the visual range of aerosol deposition can be simply adjusted according to different design intents. By controlling the trend of the gap, the trend of the aerosol after the aerosol deposition is generated through collision can be controlled, and a supporting structure for the uniform flowing of the aerosol is provided.

In addition, the implementation of the means mainly depends on the processing of the outer wall of the core, namely, one part of the outer wall of the core is processed to be attached to the inner side wall of the transparent shell, and the other part of the outer wall of the core with the groove forms a gap with the inner side wall of the transparent shell. The inner side wall of the transparent shell does not need to be additionally machined, and for a structure with a small size, the machining difficulty of the outer part of the structure is far lower than that of the inner part of the structure, and the arrangement is also beneficial to industrial application. Obviously, due to the requirement for portability of aerosol generating devices such as cigarettes, low temperature non-combustible cigarettes, and the like, the design size of the products is small, and it is necessary to avoid secondary processing or fine processing of the interior of the structure.

With reference to the drawings, adjacent grooves are spaced by spacing ribs 33023.

The spaced arrangement enables the grooves to be relatively independent, avoids the phenomenon that after the adjacent grooves are communicated, the aerosol flow field in the circulation groove generates offset flow caused by offset, can also reduce offset of fluid kinetic energy caused by offset, and reduces the integral suction resistance of the second adsorption unit to a certain extent.

In addition, according to the implementation mode of making the gas mist collide with the gas mist deposition area in a vertical flow direction, the areas forming the gaps are separated, so that the areas generating the gas mist deposition are separated, and the mutual interference and influence of the gas mist flowing out of the outlets of the adjacent gas mist channels in the gas mist deposition process are eliminated. In addition, the dissipation and deposition range of the aerosol is controlled by the interval, the visibility degree of the aerosol deposition is improved along with the enhancement of the deposition thickness, and the dissipation and deposition range is controlled, so that the thickness of the aerosol deposition is increased under the same condition. Meanwhile, the spacing ribs can also serve as a supporting structure for supporting the core body, so that the core body and the transparent shell are relatively stable, and looseness caused by shaking when the product is carried is avoided.

In an alternative implementation, the extending direction of the trench is one or a combination of the following: the core body extends in the axial direction, extends in the circumferential direction, and extends in the spiral direction with the center of the core body as the axis. The drawings illustrate the formation of the grooves extending in the circumferential direction of the core and the formation of the grooves extending in the axial direction of the core.

The grooves can be formed on the surface of the core body in a combined mode in different directions according to the direction of the gap needing to be controlled.

With reference to the figures, the arrangement of the grooves and the spacing ribs 33023 is such that at least part of the aerosol collides with the side of the spacing ribs 33023 after colliding with the aerosol collision wall.

The side wall of the channel formed by the spacing ribs provides multiple times of impact, increases the deposition of harmful substances and further reduces the content of the harmful substances.

Referring to the drawings, a flow guide protrusion 33024 is formed in the groove, and the flow guide protrusion 33024 is located at one side of the outlet of the aerosol passage, which is close to the first adsorption unit (not shown).

The convex top can butt the inner wall of shell, lets aerial fog flow out behind the export of aerial fog passageway along protruding edge to the regional circumference of aerial fog deposit completely.

In some embodiments, a gap is formed between the top of the protrusion and the inner wall of the housing.

A certain gap is preset for the flow of the deposited tar, which is beneficial to forming more obvious flaky deposition.

Referring to the drawings, the core 3302 includes an upper portion (the upper stage in fig. 7), a lower portion (the lower stage in fig. 7), and a separately provided ring portion 3306; the surface of the core 3302 is formed with a groove 33021 penetrating the upper surface and at least a part of the lower surface; the inner wall of ring 3306 forms a fit with the outer wall of the upper portion and closes off the portion of slot 33021 through the upper surface to form an aerosol channel; the spacer 33023 is provided on the surface of the lower portion and abuts the ring portion 3306.

The core body has a structure which avoids the operation of forming a channel in a small structure opening, particularly forming a channel with a turn through a combined structure, and eliminates partial obstacles for industrial application.

In addition, the aerosol generating device further comprises an outer coating layer wrapping the aerosol generating substrate and the filter tip, and the outer coating layer at least forms part of the aerosol collision wall and is transparent or basically transparent; the surround has a viewable port located outside the aerosol collision wall.

In order to fix aerosol generation substrate and filter tip, the conventional method of adopting is to wrap aerosol generation substrate and filter tip with the overcladding, in order to ensure visual effect, choose to set up visual mouth at the overcladding, visual mouth can be the opening that sets up at the overcladding, also can be the local transparent material of setting at the overcladding, see through the shell that can observe transparent shell in visual mouth, and then observe the aerosol deposition that forms in the aerosol deposition region, visual mouth's scope can cover the whole scope at aerosol deposition region place completely, also can cover the partial range at aerosol deposition region place, can also set up the shape of visual mouth as required, realize visualization and the standardization of visual result. The aforesaid aerial fog mean of flow equalizing of cooperation can see through the aerial fog deposit that can see into the visual mouth and evenly form in aerial fog deposit region, and even deposit guarantees that the person of sucking can both clearly observe obviously the deposit in all directions, obtains good visual effect.

Claims (8)

1. An aerosol generating device comprising: an aerosol-generating substrate that generates an inhalable aerosol, a filter tip coupled to the aerosol-generating substrate; it is characterized in that the preparation method is characterized in that,

the filter comprises a first adsorption unit filled with filter media and a second adsorption unit provided with an aerosol channel and an aerosol collision wall, wherein the first adsorption unit is positioned at an aerosol outlet end of the second adsorption unit; the aerosol flows along the aerosol channel and has a flowing trend along the circumferential direction of the second adsorption unit after colliding at least part of the aerosol collision wall; the second adsorption unit includes: an aerosol cooling mixing channel; the flow equalizing structure is arranged at the inlet end of the aerial fog cooling mixing channel; the aerosol deposition area is arranged at the outlet end of the aerosol cooling and mixing channel; at least one dilution air inlet communicating the interior and exterior of the aerosol-cooling mixing passage in the radial direction of the aerosol-cooling mixing passage;

the second adsorption unit further comprises a shell, and the aerosol collision wall is formed on the inner side of the shell; the core body is at least partially arranged in the shell, a plurality of aerosol channels are formed on the core body, and a plurality of grooves communicated with the aerosol channels are formed on the surface of the core body; the gas fog flows through the gas fog cooling mixing channel through the flow equalizing structure, then flows through the gas fog channel, enters the groove, collides with the gas fog collision wall, is deposited in the gas fog deposition area, and then enters the first adsorption unit;

a flow guide bulge is formed in the groove and is positioned on one side, close to the first adsorption unit, of the outlet of the aerosol channel;

a gap is formed between the top of the flow guide protrusion and the inner wall of the shell.

2. The aerosol generating device of claim 1, wherein the at least a portion of the aerosol collision wall is blocked from the flow path of the aerosol after exiting the aerosol passage, and the aerosol collides with the at least a portion of the aerosol collision wall and flows along both sides of the aerosol collision wall.

3. The aerosol generating device of claim 1, wherein the at least a portion of the aerosol collision wall is blocked from the flow path of the aerosol after exiting the aerosol passage, and the aerosol flows along a side of the aerosol collision wall after colliding with the at least a portion of the aerosol collision wall.

4. The aerosol generating device of claim 1, wherein adjacent channels are separated by a spacer rib.

5. The aerosol generating device of claim 4, wherein the arrangement of the grooves and the spacer ribs is such that at least a portion of the aerosol collides with a side of the spacer ribs after colliding with the aerosol collision wall.

6. The aerosol generating device of claim 1, wherein the grooves extend in one or a combination of the following directions: the core body extends in the axial direction, extends in the circumferential direction, and extends in the spiral direction with the center of the core body as the axis.

7. The aerosol generating device of claim 1, wherein the core comprises an upper portion, a lower portion, and a ring portion; the lower part is an aerosol outlet end, and a groove penetrating through the upper surface and at least part of the lower surface is formed on the surface of the core body; the inner wall of the ring part is matched with the outer wall of the upper part and closes the part of the groove penetrating through the surface of the upper part so as to form an aerosol channel; the spacing rib is arranged on the surface of the lower part and is abutted against the ring part.

8. The aerosol-generating device of claim 1, further comprising an outer wrap surrounding the aerosol-generating substrate and the filter, the outer wrap being at least partially transparent or substantially transparent forming the aerosol impingement wall; the overwrap has a viewable port located outside the aerosol collision wall.

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