CN110664001A - Filter and cigarette for reducing harmful substances - Google Patents

Abstract

The invention discloses a filter, comprising a filter cylinder body and a core body provided with an aerosol channel, wherein the aerosol deposition area corresponding to the aerosol channel of the core body is at least partially located on the inner side wall of the filter cylinder body, Two core bodies are symmetrically arranged at both ends of the filter cylinder body, respectively. By arranging the core body provided with the aerosol channel symmetrically on both ends of the filter cylinder body, the invention does not need to distinguish which end is connected to the tobacco substrate during processing, effectively reduces the probability of wrong installation direction, not only improves the work efficiency, but also improves the Installation accuracy.

Description

Filters and Cigarettes for Harmful Reduction

technical field

The invention belongs to the field of tobacco, and in particular relates to a filter and a cigarette for reducing harmful substances.

Background technique

At present, the commonly used filter generally consists of two sections. In order to improve the filtering effect, the R&D personnel in the industry consider filling the filter rod of one section of the filter with a high-efficiency adsorption material such as activated carbon. Although such a setting can filter more harmful substances to a certain extent, However, while improving the filtration capacity, the overall absorption resistance of the filter will also be enhanced, and the filtration capacity is always proportional to the size of the filter material. Setting the size of the filter too long or too thick will not meet the market demand.

Therefore, the designer designed a core filter. The core filter has an aerosol channel designed in its structure. Through the aerosol channel, the aerosol is liquefied to the cylinder wall of the filter, so as to filter a part of the aerosol and play a role in filtering effect.

However, in the process of processing, due to batch processing, the direction of the aerosol filter has certain requirements, but the installation direction may be wrong during processing, which affects the normal progress of the process and reduces the processing efficiency.

How to solve the above problems has become an urgent technical problem to be solved at present.

SUMMARY OF THE INVENTION

In view of the above deficiencies, the present invention provides a filter, wherein the filter core body is symmetrically arranged to prevent wrong installation direction and improve processing efficiency.

The present invention is achieved through the following technical solutions:

A filter comprises a filter cylinder body and a core body provided with an aerosol channel, the aerosol deposition area corresponding to the aerosol channel of the core body is at least partially located on the inner side wall of the filter cylinder body, and the filter cylinder Two cores are arranged symmetrically at both ends of the body.

Preferably, the core body includes a first core body, and the two first core bodies are symmetrically arranged at both ends of the inner part of the filter cylinder body, and a space between the outer wall of the first core body and the inner side wall of the filter cylinder body The gap forms an extension of the aerosol channel, and the aerosol deposition area is formed on the inner sidewall of the filter cartridge located at the gap.

Preferably, the aerosol channel is such that after the aerosol flows out from the outlet of the aerosol channel, at least a part of the aerosol collides with the aerosol deposition area in a flow direction perpendicular or approximately perpendicular to the inner wall of the filter cartridge.

Preferably, the aerosol channel satisfies that after the aerosol flows out from the outlet of the aerosol channel, at least part of the aerosol collides with the aerosol deposition area in a flow direction that is tangential or approximately tangent to the inner wall of the filter cartridge.

Preferably, the aerosol channel has a turning portion, the aerosol flows axially through the turning portion before the core body, and the aerosol flows along the radial direction of the core body after passing through the turning portion or toward the core body. Flow in the direction close to the filter cartridge.

Preferably, the first core body includes a lower base and an upper boss, the base is arranged at the inner outermost end of the filter cylinder body; the outer circumference of the boss is symmetrically provided with a first groove in the axial direction and a second groove is arranged symmetrically in the radial direction on the upper outer periphery of the lower base, and the first groove communicates with the second groove to form a right-angle groove.

Preferably, the core body further includes a second core body, the second core body is annular, the second core body is sleeved on the upper boss of the first core body and the bottom surface is in contact with the base of the first core body connected so that the right-angled grooves form aerosol channels.

Preferably, the outer periphery of the first core is formed with straight spaced ribs that divide the gap into several partitions, and the outlet of each of the aerosol channels is located between two adjacent straight spaced ribs.

Preferably, a limiting rib is provided at the lower part of the base of the outlet of the aerosol channel.

Preferably, the filter cylinder is a transparent cylinder, and a dilution air inlet is provided in the middle.

A cigarette for reducing harmful substances, the cigarette includes a tobacco substrate segment and a filter segment, the filter segment including the filter as described above.

Compared with the prior art, the present invention has the following advantages:

By arranging the core body provided with the aerosol channel symmetrically on both ends of the filter cylinder body, the present invention does not need to distinguish which end is connected to the tobacco substrate during processing, effectively reducing the probability of wrong installation direction, improving work efficiency and improving Installation accuracy, convenient and fast.

Among them, the principle of aerosol deposition is mainly to let the aerosol regularly collide with the aerosol deposition area such as the wall structure, and then deposit on the wall structure under the action of temperature difference, or by controlling the change of the aerosol flow rate, the aerosol velocity decreases At the same time, the aerosol and the wall structure are fully contacted, so that the time of the aerosol staying in the aerosol deposition area is prolonged, and the viscous liquid particles in the aerosol are deposited.

It can be seen that the temperature difference is very important for the deposition of harmful substances in the aerosol. In the filter tip, the dilution air inlet is set in the middle of the filter cylinder, which can effectively reduce the temperature in the middle and both ends, so that the aerosol deposition area is better. deposition and improve filtration efficiency.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the filter cylinder of the present invention;

Fig. 3 is the shape schematic diagram of the first core of the present invention;

4 is a schematic diagram of the shape of the ring portion of the second core of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the azimuth terms such as left, right, top, bottom, front, and back in the embodiments of the present invention are only relative concepts to each other or refer to the normal use state of the product, that is, the traveling direction of the product. and should not be considered limiting.

In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention not only refer to changes in position, but also include that there is no relative change in positions such as rotation and rolling, but the state does change. The movement of the mentioned numbers "one", "two", etc. does not represent a specific reference, but only an implementation.

1, the present invention provides a filter, comprising a filter cylinder 1 and a core body provided with an aerosol channel 2, wherein the aerosol deposition area corresponding to the aerosol channel 2 of the core body is at least partially located in the On the inner side wall of the filter cylinder 1 , two core bodies are symmetrically arranged at both ends of the filter cylinder 1 .

By symmetrically arranging the core body provided with the aerosol channel 2 on both ends of the filter cylinder body 1, it is not necessary to distinguish which end is connected to the tobacco substrate during processing, and can be connected to the tobacco substrate end by taking it at will during processing, effectively Reduce the probability of wrong installation direction, not only improve work efficiency, but also improve the installation accuracy.

By controlling the aerosol deposition, the harmful substances in the aerosol, such as the smoke, form a flake-like deposition on the inner side wall of the filter cylinder 1, which can effectively reduce the content of the harmful substances in the smoke, such as tar, and through the aerosol deposition The method of non-adsorption and filtration reduces the content of harmful substances and basically does not increase the suction resistance.

The principle of aerosol deposition is mainly to let the aerosol regularly collide with the aerosol deposition area such as the wall structure, and then deposit on the wall structure under the action of the temperature difference, or by controlling the change of the aerosol flow rate, while the aerosol speed decreases The aerosol and the wall structure are fully contacted, so that the aerosol stays in the aerosol deposition area for a longer time, and the viscous liquid particles in the aerosol are deposited.

As shown in FIG. 1 and FIG. 3 , the core body includes a first core body 3 , and the two first core bodies 3 are symmetrically arranged at both ends of the interior of the filter cylinder body 1 , and the outer wall of the first core body 3 The gap 4 with the inner side wall of the filter cylinder body 1 forms an extension of the aerosol channel, and the aerosol deposition area is formed on the inner side wall of the filter cylinder body 1 located at the gap 4 .

The symmetrical arrangement of the built-in cores at both ends is also conducive to the assembly of the structure, or to the application in industrial mass production. In order to meet the needs of mass production, it is expected to reduce the structural complexity of each constituent element as much as possible. To some extent, it is obviously simpler to provide the aerosol channel inside the filter cylinder by assembling, which is obviously simpler than making the aerosol channel on the filter cylinder body, which can make the structure of the filter cylinder itself simpler and reduce the development of molds. The cost is also improved, and the stability of the structure is also improved. As long as a cavity for accommodating the core body is formed on the filter cylinder body, the above solution can be realized. Obviously, such a design can ensure that the production of the filter cylinder body has a sufficiently high yield.

A gap 4 is formed between the core body and the filter cylinder 1 , preferably a gap with uniform thickness. After the aerosol flows out of the aerosol channel, the aerosol will quickly spread and fill into the gap 4 , and then a deposit will be formed at the gap 4 . This is a convenient means to control the deposition location and range. As long as the range of gap formation is controlled, the range of aerosol spread can be controlled, so that the visualization range of aerosol deposition can be simply adjusted according to different design intentions.

Moreover, the implementation of this method mainly relies on the processing of the outer wall of the core, so that a part of the outer wall of the core can be processed to fit the inner wall of the filter cylinder 1, and the other part forms a gap 4 with the inner wall of the filter cylinder 1, so that the The aforementioned control intent can be achieved. There is no need to perform additional processing on the inner side wall of the filter cylinder. For small-sized structures, the processing difficulty for the outside of the structure is far lower than the processing difficulty for the inside of the structure. This arrangement is also conducive to industrialization. Applied. Obviously, due to the portable requirements of aerosol generating device products such as cigarettes, low temperature non-combustible smoke, etc., the design dimensions of general products are relatively small, and it is very necessary to avoid secondary processing or fine processing inside the structure. .

Referring to FIG. 1 , the aerosol channel 2 satisfies that after the aerosol flows out from the outlet of the aerosol channel, at least part of it collides with the aerosol deposition area in a flow direction perpendicular or approximately perpendicular to the inner wall of the filter cylinder.

When the aerosol collides with the aerosol deposition area, the inertial force of the aerosol flow will play a role, and the condensed droplets in the aerosol will collide with the aerosol deposition area under the action of the inertial force, and collide with the impact wall in a vertical direction. Inertial force will play the greatest role. This inertial force-driven collision is beneficial for aerosol deposition, because the condensed droplets in the aerosol generally have a certain viscosity. The location where the collision occurred. This vertical collision method will also drive the aerosol to escape rapidly, and contact the aerosol deposition area in an irregular but generally uniform state in a large range, so that deposition occurs under the action of temperature difference.

Referring to FIG. 1 , the aerosol channel satisfies that after the aerosol flows out from the outlet of the aerosol channel, at least part of it collides with the aerosol deposition area in a flow direction tangential or approximately tangent to the inner wall of the filter cartridge.

Another way to make the aerosol deposited in the aerosol deposition area located on the inner side wall of the transparent shell is to let the aerosol flow through the aerosol channel in a flow direction that is tangent or approximately tangent to the inner side wall of the filter cylinder Collision into the aerosol deposition area, this setting is to flow along the inner sidewall under the action of the inertial force and suction of the aerosol, and then match the arc shape of the inner sidewall of the filter cylinder, the aerosol will be close to the inner sidewall under the action of centrifugal force during flow. At this time, with the temperature difference and flow rate adjustment means, the aerosol will be deposited on the inner side wall of the filter cylinder, and this realization method will make the deposition of the aerosol more uniform.

As shown in FIG. 3 , the aerosol channel 2 has a turning portion, and the aerosol flows axially in the front of the core body after passing through the turning portion. direction flow.

By setting the bending of the aerosol channel, the flow direction of the aerosol is controlled to change when flowing through the aerosol channel, and finally flows to the inner side wall of the filter cylinder. Combined with the aforementioned aerosol deposition principle, when the aerosol enters, the aerosol flows along the axial direction of the core to reduce resistance. Then, change the flow direction at the position where the deposition needs to be formed. When flowing through the bend, due to the change of direction, it will collide with the inner wall of the aerosol channel, and some deposits will also be generated. These deposits are relatively small, because the flow rate basically does not change. , the inner wall of the aerosol channel formed inside the core will not have a sufficient temperature difference with the aerosol, these small deposits help to reduce the content of harmful substances in the aerosol, on the other hand, due to the stability of the suction quality First, it is difficult to visualize the deposition in this part of the deposition, and secondly, if too much deposition occurs, it will affect the flow field of the aerosol in the aerosol channel. In the process of puffing, the aerosol at the beginning and the aerosol at the end may have a certain difference in taste, which affects the user's experience.

In this way, the area where the aerosol is deposited is mainly distributed on the inner wall of the transparent shell: the flow direction of the aerosol is changed by the bending part, and then the aerosol is hit perpendicular to the inner wall of the filter cylinder. At the same time, affected by the temperature difference and the flow velocity of the aerosol tends to be gentle after flowing out of the aerosol channel, and tends to form deposition at the impact point and the range of the impact point that spreads outward. Or flow to the inner side wall of the filter cylinder through other directions, such as flowing to the inner side wall in a direction tangent to the inner side wall of the filter cylinder, and then flow along the inner side wall, under the influence of temperature difference, while the flow rate decreases, in The inner sidewall of the filter cartridge forms a zoned deposition.

Specifically, the first core body 3 includes a lower base 31 and an upper boss 32, and the base is arranged at the inner outermost end of the filter cylinder; the outer circumference of the boss is symmetrically arranged along the axial direction. a groove, a second groove is arranged symmetrically in the radial direction on the upper outer periphery of the lower base, and the first groove communicates with the second groove to form a right-angle groove. As shown in FIG. 1 and FIG. 4 , the core body further includes a second core body 5 , the second core body 5 is annular, and the second core body 5 is sleeved on the upper part of the first core body 3 to protrude The platform 32 and the bottom surface are in contact with the first core base 31 , so that the right-angled grooves form aerosol channels.

The base 31 of the first core body 3 is set at the outermost end of the filter cylinder body 1, and then the annular second core body 5 is sleeved on the upper boss 32 of the first core body, close to the filter cylinder body 1, so that any end can be directly connected to the tobacco substrate, which is convenient for mass industrial production. In addition, the composition structure of the core body, through the combined structure, avoids the formation of channels through openings in small structures, especially the operation of forming channels with bends, which eliminates some obstacles to industrial application.

As shown in FIG. 3 , the outer periphery of the first core body 3 is formed with straight spacing ribs 33 that divide the gap into several sections, and the outlet of each aerosol channel is located between two adjacent straight spacing ribs 33 . .

For the realization method of making the aerosol collide with the aerosol deposition area in a vertical flow direction, a more favorable matching arrangement is to separate the areas where the gap is formed, so as to separate the areas where the aerosol deposition occurs, and eliminate the need for the aerosol deposition process. In the process, the aerosols flowing out of the adjacent aerosol channel outlets interfere and influence each other. At the same time, the escape and deposition range of the aerosol is controlled by the interval. The visibility of the aerosol deposition increases with the thickness of the deposition. Controlling the range of the escape and deposition is beneficial to increase the thickness of the aerosol deposition under the same conditions. At the same time, the spacer ribs can also act as a support structure for supporting the core body, so that the core body and the filter cylinder body are relatively stable and avoid loosening due to shaking when the product is carried.

Preferably, a limiting rib 34 is provided at the lower part of the base of the outlet of the aerosol channel.

Preferably, on the first core body, a limiting rib is formed between the outlet of the aerosol channel and the end of the first core body close to the outlet, and the top of the limiting rib fits the filter cylinder body or forms a gap. Both the spacer ribs and the limit ribs are arranged along the axial direction of the core body. The limiting rib further separates the gap and mainly plays the role of equalizing the flow. The limiting rib is formed between adjacent spacing ribs, and the distance between the limiting rib and the two spacing ribs is preferably the same. After the aerosol is deposited, it is in a relatively disordered state. Through the arrangement of the spacer ribs and limit ribs, the state of the aerosol when it flows out from the first core outlet tends to be uniform, and the aerosol can enter the downstream in a relatively uniform state after it flows out. .

In view of the above, the aerosol deposition is evenly distributed, the flow direction change is more gradual, and the large-angle flow direction change is reduced, thereby reducing the loss of driving force during the flow of the aerosol and reducing the suction resistance.

As shown in FIG. 2 , the filter cylinder 1 is a transparent cylinder, and a dilution air inlet 11 is provided in the middle.

The filter cylinder body 1 is set as a transparent cylinder body, which can clearly see the installation of the inner core body during assembly, which is convenient to improve the yield rate and the efficiency of installation and assembly in industrial mass production, thereby accelerating the efficiency of industrial production.

The dilution air inlet 11 is set in the middle, no matter which end is connected to the tobacco substrate, the temperature can be lowered in the middle near the aerosol deposition area, which is beneficial to the liquefaction of the aerosol, and more deposition in the aerosol deposition area to improve the filtration efficiency.

Finally, it should be noted that when a component is referred to as being "located on" or "disposed on" another component, it can be on the other component or may co-exist with the centering component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may also be an intervening component.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (11)

1. A filter, comprising a filter cylinder body, a core body provided with an aerosol channel, the aerosol deposition area corresponding to the aerosol channel of the core body is at least partially located on the inner sidewall of the filter cylinder body, and it is characterized in that: In that, two core bodies are symmetrically arranged at both ends of the filter cylinder body. 2 . The filter according to claim 1 , wherein the core body comprises a first core body, and two of the first core bodies are symmetrically arranged at both ends of the interior of the filter cylinder, and the first core body is symmetrical. 3 . The gap between the outer wall of the body and the inner side wall of the filter cylinder forms an extension of the aerosol channel, and the aerosol deposition area is formed on the inner side wall of the filter cylinder at the gap. 3. The filter according to claim 1, wherein the aerosol channel satisfies the aerosol deposition at least partially in a vertical or approximately vertical flow direction with the inner wall of the filter cylinder after the aerosol flows out from the aerosol channel outlet. area. 4. The filter according to claim 1, characterized in that, the aerosol passage satisfies that after the aerosol flows out from the outlet of the aerosol passage, at least part of the aerosol collides with the flow direction tangent or approximately tangent to the inner wall of the filter cylinder. Fog deposition area. 5 . The filter according to claim 1 , wherein the aerosol channel has a turning portion, and the aerosol flows axially in front of the core body through the turning portion, and the aerosol passes through the turning portion. 6 . The rear part flows in the radial direction of the core or toward the direction close to the filter cartridge. 6. The filter according to claim 5, wherein the first core body comprises a lower base and an upper boss, the base is provided at the inner outermost end of the filter cylinder; the boss A first groove is arranged symmetrically in the axial direction on the outer periphery of the table, and a second groove is arranged symmetrically in the radial direction on the upper outer periphery of the lower base. The first groove communicates with the second groove to form a right-angle groove. 7 . The filter according to claim 6 , wherein the core body further comprises a second core body, the second core body is annular, and the second core body is sleeved on the first core body. 8 . The upper part of the body is convex and the bottom surface is in contact with the base of the first core body, so that the right-angle groove forms an aerosol channel. 8 . The filter according to claim 2 , wherein the outer periphery of the first core is formed with straight spacing ribs that divide the gap into several partitions, and the outlet of each of the aerosol channels is located adjacent to 8 . between two straight spacers. 9 . The filter according to claim 1 , wherein a limiting rib is provided at the lower part of the base of the outlet of the aerosol channel. 10 . 10 . The filter according to claim 9 , wherein the filter cylinder is a transparent cylinder, and a dilution air inlet is provided in the middle. 11 . 11. A cigarette for reducing harmful substances, characterized in that the cigarette comprises a tobacco matrix segment and a filter segment, the filter segment comprising the filter according to claims 1-10.

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