Ternary composite filter stick for cooling and filtering smoke and cigarette

Abstract

The ternary composite filter stick comprises three parts, namely a front-section filter stick close to the cigarette end, a middle-section filter stick in the middle and a rear-section filter stick close to the smoking end. The filter rod is characterized in that the middle-section filter rod comprises a filter rod body, three cavities which are arranged in the axial direction of the filter rod body are formed in the filter rod body and are the first cavity, the second cavity and the third cavity respectively, the three cavities are communicated with one another, and in the axial direction of the filter rod body, the diameter of the first cavity is gradually increased, the diameter of the second cavity is gradually increased firstly, and the diameter of the third cavity is gradually increased firstly. The diameter of the third cavity is gradually increased; a first flow channel is formed in the connecting position of the first cavity and the second cavity, and a second flow channel is formed in the connecting position of the second cavity and the third cavity.

Description

Technical Field

[0001] The invention relates to the field of cigarette filter rod design, and specifically discloses a ternary composite filter rod and a cigarette for cooling and filtering smoke. Background Art

[0002] The ternary composite filter rod in the prior art includes three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle filter rod is the middle filter rod, and the rear filter rod near the smoking end is the rear filter rod; generally, the front filter rod and the rear filter rod are mostly made of cellulose acetate, and the structure is rarely improved. At present, most of the structural improvements are concentrated on the middle filter rod. By designing the structure of the middle filter rod, the filtration and cooling of the smoke can be achieved; for example, Chinese patent CN117652701A discloses a composite filter rod with a visible swirl component for cigarettes and a preparation method thereof; wherein the swirl used in the middle filter rod Parts are used to filter smoke; in Chinese patent CN213246890U, a ternary composite cigarette filter rod with the effect of reducing smoke temperature is disclosed; in the three-section filter rod, round holes are arranged to achieve cooling; in Chinese patent CN218499985U, a functional ternary composite filter rod and cigarette are disclosed, which include a common filter rod, a groove filter rod and a hollow filter rod connected in sequence, wherein the common filter rod is connected to the end of the cigarette rod, and the hollow filter rod is in contact with the inlet end; wherein the hollow filter rod has a through hole along its axial direction, and the groove filter rod has a groove structure along its axial direction.

[0003] Although the above patents disclose some ternary composite filter rods that can achieve cooling and filtering, the cooling and filtering effects are not very good; with the enhancement of health awareness, people have put forward higher requirements on the filtering effect of cigarettes, so there is a need to propose a ternary composite filter rod with better effect. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a ternary composite filter rod and a cigarette for cooling and filtering smoke, which can better improve the filtering effect and improve the smoking experience.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a ternary composite filter rod for cooling and filtering smoke, comprising three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the rear filter rod near the smoking end is the middle filter rod; the middle filter rod comprises a filter rod body, and the filter rod body is formed with three cavities arranged along its axial direction, namely, a first cavity, a second cavity, and a third cavity, the three cavities are interconnected, and along the axial direction of the filter rod body, the diameter of the first cavity gradually increases, the diameter of the second cavity first gradually increases, and then gradually decreases, and the diameter of the third cavity gradually increases; a first flow channel is formed at the connection position of the first cavity and the second cavity, and a second flow channel is formed at the connection position of the second cavity and the third cavity;

[0007] As a further technical solution, the connection position between the first cavity and the second cavity is transitioned through an arc; the connection position between the third cavity and the second cavity is transitioned through an arc.

[0008] As a further technical solution, the second cavity is a symmetrical structure, which is symmetrical with respect to the axial plane of the filter rod body and is also symmetrical with respect to the radial plane of the filter rod body.

[0009] As a further technical solution, the maximum diameter of the second cavity is smaller than the maximum diameters of the first cavity and the third cavity.

[0010] As a further technical solution, the first cavity and the third cavity have the same structure, and are symmetrical with respect to a radial plane located at the center of the filter rod body; the first cavity and the third cavity are each a conical cavity.

[0011] In a second aspect, the present invention further discloses a cigarette, comprising the above-mentioned ternary composite filter rod.

[0012] In a third aspect, the present invention provides a ternary composite filter rod for cooling and filtering smoke, comprising three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the rear filter rod near the smoking end is the filter rod; comprising a filter rod body, wherein the filter rod body is formed with three cavities arranged along its circumferential direction, namely, a first cavity, a second cavity, and a third cavity, the three cavities are independently arranged, and penetrate the entire filter rod body; the first cavity, the second cavity, and the third cavity have the same shape and size, and along the axial direction of the filter rod body, the first cavity, the second cavity, and the third cavity each include a cylindrical section and a conical section; along the axial direction of the filter rod body, a fourth cavity is further arranged at the center position of the filter rod body; the fourth cavity is a blind hole that does not penetrate the filter rod body, and the fourth cavity includes a cylindrical section and a conical section;

[0013] As a further technical solution, a cylindrical groove is provided at each end of the filter rod body, and the first cavity, the second cavity, the third cavity and the fourth cavity all extend from the bottom of the groove to the inside of the filter rod body.

[0014] As a further technical solution, the length ratio of the cylindrical section and the conical section of the first cavity, the second cavity and the third cavity is 3:2.

[0015] As a further technical solution, the fourth cavity occupies 3 / 4 of the total length of the entire filter rod body.

[0016] In a fourth aspect, the present invention further discloses a cigarette, comprising the above-mentioned ternary composite filter rod.

[0017] The beneficial effects of the present invention are as follows:

[0018] Traditional cigarette filter rods are mainly made of cellulose acetate material and only have a simple filtering function. However, during the process of lighting and smoking, the smoke has a certain temperature. The temperature at the mouth affects the taste of the smoke and irritates the oral cavity. The present invention sets a filter element that can reduce the temperature in the composite filter rod, and changes the flow rate of the smoke through the structural setting. The cooling effect of the smoke is achieved, the taste of the smoke is improved, and the damage to the oral cavity is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the ternary composite filter rod for flue gas cooling and filtering disclosed in Example 1;

[0020] Figure 2 Schematic diagram of the axial cross section of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 1 Figure 1 ;

[0021] Figure 3 Schematic diagram of the axial cross section of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 1 Figure 2 ;

[0022] Figure 4 This is a schematic diagram of a radial cross section of a ternary composite filter rod for flue gas cooling and filtering disclosed in Example 1;

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 2 Figure 1 ;

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 2 Figure 2 ;

[0025] Figure 7Schematic diagram of the axial cross section of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 2 Figure 1 ;

[0026] Figure 8 Schematic diagram of the axial cross section of the ternary composite filter rod for flue gas cooling and filtration disclosed in Example 2 Figure 2 ;

[0027] In the figure: 1. filter rod body, 11. first cavity, 12. second cavity, 13. third cavity;

[0028] 2. filter rod body, 21. first cavity, 22. second cavity, 23. third cavity, 24. fourth cavity; 25. front groove, 26. rear groove; DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0031] Various composite filter rods with built-in rheological components for cigarettes in the prior art include: an acetate filter rod, a rheological component, and a forming paper. The two ends of the rheological component are respectively in contact with the acetate filter rod, and the outer sides of the rheological component and the acetate filter rod are coated with forming paper. The rheological component is a polymer elastic material.

[0032] Example 1

[0033] This embodiment provides a ternary composite filter rod, which includes three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the rear filter rod near the smoking end is the back filter rod; this embodiment is mainly designed for the middle filter rod, and the specific middle filter rod disclosed in this embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, it includes a filter rod body 1, wherein the filter rod body 1 is formed with three cavities arranged along its axial direction, namely a first cavity 11, a second cavity 12, and a third cavity 13, wherein the three cavities are interconnected, and along the axial direction of the filter rod body 1, the diameter of the first cavity 11 gradually increases, the diameter of the second cavity 12 first gradually increases, and then gradually decreases, and the diameter of the third cavity 13 gradually increases; a first flow channel is formed at the connection position of the first cavity 11 and the second cavity 12, and a second flow channel is formed at the connection position of the second cavity 12 and the third cavity 13;

[0034] Furthermore, the connection position between the first cavity 11 and the second cavity 12 is transitioned through an arc; the connection position between the third cavity 13 and the second cavity 12 is transitioned through an arc;

[0035] Furthermore, the cross-sectional areas of the first flow channel and the second flow channel are the same, and the second cavity 12 is a symmetrical structure, which is symmetrical with respect to the axial plane of the filter rod body 1 and symmetrical with respect to the radial plane of the filter rod body 1. By designing the second cavity 12 as a symmetrical structure and designing the cross-sectional areas of the first flow channel and the second flow channel to be the same, it can be ensured that the smoke entering the second cavity 12 and the smoke flowing out of the cavity 12 are basically balanced, and the pressure inside the second cavity 12 is basically balanced.

[0036] Furthermore, the maximum diameter of the second cavity 12 is smaller than the maximum diameters of the first cavity 11 and the third cavity 13 .

[0037] Furthermore, the first cavity 11 and the third cavity 13 have the same structure, and the first cavity 11 and the third cavity 13 are symmetrical with respect to the radial plane located at the center of the filter rod body 1; the first cavity 11 and the third cavity 13 are each a conical cavity, that is, the cross-sectional area of ​​the first flow channel and the second flow channel combined is the same; the second cavity 12 is a symmetrical structure, so that the entire middle section filter rod is a symmetrical structure, ensuring that the pressure inside the middle section filter rod remains basically balanced.

[0038] Furthermore, the sum of the heights of the first cavity and the third cavity is greater than the height of the second cavity.

[0039] The working principle of the ternary composite filter rod disclosed in this embodiment is as follows:

[0040] The smoke generated by the burning of the tobacco segment first passes through the front filter rod for primary filtration, and then enters the middle filter rod. The first cavity of the middle filter rod collects the smoke at the first level. Since the area of ​​the first cavity gradually decreases with the flow direction of the smoke, the smoke is accelerated at the first flow channel, and the smoke generates a vortex; then it enters the second cavity. Since the area of ​​the second cavity suddenly increases, the flow rate of the smoke will drop rapidly. Therefore, the smoke can achieve the deposition of particulate matter in the cavity, and further cooling can also be achieved; then it passes through the second flow channel and enters the third cavity. Since the area of ​​the second flow channel drops sharply again, the smoke is accelerated again at the second flow channel, and the smoke generates a vortex; at the same time, since the area of ​​the third cavity gradually increases, the smoke is diffused, and the smoke can flow evenly into the rear filter rod;

[0041] More specifically, since the inner surface of the first cavity is a conical slope with a certain inclination angle, when the smoke collides with the conical slope, it will be reflected, and after reflection, it will mix and collide with other smoke to perform further heat exchange to achieve primary cooling and deposition of particulate matter; then, the smoke will flow through the first flow channel under the entrainment of other smoke, and at the same time, the area of ​​the first channel is sharply reduced relative to the area of ​​the first cavity, so the smoke will be accelerated; after being accelerated by the first flow channel, it will enter the second cavity, and the smoke will be buffered for the second time to achieve secondary cooling; in the second cavity, since the inner surface of the second cavity includes two sections of conical slopes with different inclination angles, when the smoke enters, it will collide with the latter section of the conical slope for cooling, and then it will be reflected, and after reflection, it will collide with the former section of the conical slope for cooling. After this reflection, some smoke will flow through the second flow channel into the third cavity with part of the smoke, while some smoke will not flow into the third cavity due to the reflection angle problem. , will continue to be emitted to the latter conical slope, and reflect again, how to circulate, the smoke is constantly cooled, the particulate matter is constantly deposited, and the smoke after cooling and deposition finally flows through the second flow channel into the third cavity; the smoke that has been cooled for many times enters the third cavity after being accelerated by the second flow channel; the third cavity diffuses the smoke, so that the smoke can flow into the rear filter rod evenly; but the third cavity can also achieve cooling, and the cooling principle is similar to that of the first cavity and the second cavity; however, since the conical slope of the third cavity is diffusion-type, the cooling effect of the third cavity is relatively poor, and it only plays a supplementary cooling effect. The main cooling of the smoke is achieved through the first cavity and the second cavity. The role of the third cavity is mainly to achieve the diffusion of the smoke and the first cavity, the second cavity, and the third cavity in this embodiment further deposit and intercept the particulate matter in the smoke, to ensure the experience of the smoker and is beneficial to health.

[0042] This embodiment is based on the principle of fluid mechanics and combines the principle of flue gas flow field change. By adding a rheological fixture to the filter rod, the rheological state of the flue gas is significantly changed, so that the flue gas has a complex flow trajectory when passing through the filter rod, and produces eddy currents, dispersion, acceleration, deceleration and other effects when passing through the fixture, thereby improving the filtering effect and achieving the effect of reducing tar and reducing harm. At the same time, the geometric structure design of the rheological fixture makes the resistance of the filter rod moderate and does not affect the smoothness of smoking.

[0043] In some embodiments, the outer side of the middle filter rod is wrapped with transparent wrapping paper, which has no air permeability, but the smoke flow inside can be seen.

[0044] In some embodiments, the front filter rod close to the tobacco segment is made of cellulose acetate and is used for preliminary filtering of large particulate matter in the smoke.

[0045] In some embodiments, the rear filter rod near the mouth end is made of cellulose acetate and is used to further filter the smoke and remove residual particles and harmful substances.

[0046] In a second aspect, this embodiment further discloses a cigarette, comprising the ternary composite filter rod described above in this embodiment.

[0047] Example 2

[0048] This embodiment provides a ternary composite filter rod, including three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the rear filter rod near the smoking end is the back filter rod; this embodiment is mainly designed for the middle filter rod, and the specific middle filter rod disclosed in this embodiment is as follows Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, it includes a filter rod body 2, and three cavities arranged along the circumferential direction of the filter rod body 2 are formed in the filter rod body 2, namely a first cavity 21, a second cavity 22, and a third cavity 23. The three cavities are independently arranged and run through the entire filter rod body 2; the first cavity 21, the second cavity 22, and the third cavity 23 have the same shape and size, and along the axial direction of the filter rod body 1, the first cavity 21, the second cavity 22, and the third cavity 23 each include a cylindrical section and a conical section; along the axial direction of the filter rod body 2, a fourth cavity 21 is further arranged at the center of the filter rod body 2. Cavity 24; the fourth cavity 24 is a blind hole and does not penetrate the filter rod body 2; the fourth cavity 24 also includes a cylindrical section and a conical section; the function of the fourth cavity 24 is mainly that the middle part of the flue gas first realizes the deposition of part of the particle phase in the fourth cavity 24, and at the same time, by increasing the path of the flue gas, it has a certain cooling effect, and after the particle phase is deposited, it flows out of the fourth cavity 24; then it flows into the first cavity 21, the second cavity 22, and the third cavity 23, and further cooling and particle phase deposition are carried out, thereby improving the cooling and filtering effects as a whole.

[0049] Furthermore, a cylindrical groove is provided at each end of the filter rod body 2, namely a front groove 25 and a rear groove 26; the front groove 25 is located on the front filter rod side; the rear groove 26 is located on the rear filter rod side; the first cavity 21, the second cavity 22, the third cavity 23, and the fourth cavity 24 all extend from the bottom of the front groove 25 to the inside of the filter rod body 2, and the first cavity 21, the second cavity 22, and the third cavity 23 penetrate to the rear groove 26;

[0050] Furthermore, the length ratio of the cylindrical section to the conical section of the first cavity 21, the second cavity 22, and the third cavity 23 is 3:2. By designing the length ratio of the cylindrical section to the conical section, the effects of flue gas cooling and deposition can be controlled, because the cylindrical section mainly realizes flue gas cooling, and the conical section mainly realizes deposition; the length ratio of the cylindrical section to the conical section can be designed according to needs;

[0051] Furthermore, the fourth cavity occupies about 3 / 4 of the total length of the entire filter rod body 2. By controlling the length of the fourth cavity, the effect of cooling and deposition of the smoke can be controlled; and because the fourth cavity is designed as a blind hole rather than a through hole, harmful substances in the smoke can be deposited therein;

[0052] The working principle of the ternary composite filter rod disclosed in this embodiment is as follows:

[0053] The smoke generated by the burning of the tobacco segment first passes through the front filter rod for primary filtration, and then enters the middle filter rod. First, the front groove 25 has a gathering effect on the smoke. At this time, the pressure of the smoke at this end can be increased. After gathering, part of the smoke enters the fourth cavity 24, and first in the fourth cavity 24, the deposition of part of the particle phase is realized. At the same time, by increasing the path of the smoke, a certain cooling effect is achieved. After the particle phase is deposited, it flows out of the fourth cavity 24, and then flows out from the first cavity 21, the second cavity 22, and the third cavity 23. Part of the smoke directly enters the first cavity 21, the second cavity 22, and the third cavity 23. Since the cross-sections of the cavities 21, the second cavity 22, and the third cavity 23 are significantly smaller than those of the front grooves, the smoke in the first cavity 21, the second cavity 22, and the third cavity 23 will be accelerated to a certain extent, and in the first cavity 21, the second cavity 22, and the third cavity 23, the smoke will be accelerated to a certain extent. The temperature is lowered in the cavity 21, the second cavity 22 and the third cavity 23, and particle phase deposition is achieved at the same time. The cylindrical sections of the first cavity 21, the second cavity 22 and the third cavity 23 mainly achieve the cooling of the flue gas, and the conical section mainly achieves the deposition of particle phase of the flue gas. When the flue gas flows from the cylindrical section to the conical section, the area suddenly increases, so the flue gas flow rate decreases, and particle phase deposition is achieved in this section, and of course, the cooling of the flue gas can also be achieved; then, the flue gas coming out of the first cavity 21, the second cavity 22 and the third cavity 23 is finally collected and dispersed in the rear groove 26. After being collected, the flue gas pressure will drop, and then it will enter the rear filter rod; at the same time, the area of ​​the rear groove 26 relative to the first cavity 21, the second cavity 22 and the third cavity 23 is further increased, and the flue gas flow rate will be further reduced, so that the flue gas is further cooled and the particle phase is deposited in the rear groove 26. The device can achieve better cooling and filtering of smoke as a whole. At the same time, the front groove 25 and the rear groove 26 are provided to adjust the pressure at both ends of the middle filter rod, thereby reducing the suction resistance of the cigarette.

[0054] The present invention is based on the principle of fluid mechanics and combines the principle of flue gas flow field change. By adding a rheological fixture to the filter rod, the rheological state of the flue gas is significantly changed, so that the flue gas has a complex flow trajectory when passing through the filter rod, and produces eddy currents, dispersion, deceleration and other effects when passing through the fixture, thereby improving the filtering effect and achieving the effect of reducing tar and reducing harm. At the same time, the geometric structure design of the rheological fixture makes the resistance of the filter rod moderate and does not affect the smoothness of smoking.

[0055] In some embodiments, the outer side of the middle filter rod is wrapped with transparent wrapping paper, which has no air permeability, but the smoke flow inside can be seen.

[0056] In some embodiments, the front filter rod close to the tobacco segment is made of cellulose acetate and is used for preliminary filtering of large particulate matter in the smoke.

[0057] In some embodiments, the rear filter rod near the mouth end is made of cellulose acetate and is used to further filter the smoke and remove residual particles and harmful substances.

[0058] In a second aspect, this embodiment further discloses a cigarette, comprising the ternary composite filter rod described above in this embodiment.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-component composite filter rod for cooling and filtering smoke, comprising three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the filter rod near the smoking end is the rear filter rod; characterized in that: The middle section filter rod comprises a filter rod body, and three cavities arranged along its axial direction are formed in the filter rod body, namely a first cavity, a second cavity, and a third cavity. The three cavities are interconnected, and along the axial direction of the filter rod body, the diameter of the first cavity gradually increases, the diameter of the second cavity first gradually increases, and then gradually decreases, and the diameter of the third cavity gradually increases; a first flow channel is formed at the connecting position of the first cavity and the second cavity, and a second flow channel is formed at the connecting position of the second cavity and the third cavity.

2. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: The connection position between the first cavity and the second cavity is transitioned through an arc; the connection position between the third cavity and the second cavity is transitioned through an arc.

3. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: The second cavity is a symmetrical structure, which is symmetrical with respect to the axial plane of the filter rod body and is also symmetrical with respect to the radial plane of the filter rod body.

4. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: The maximum diameter of the second cavity is smaller than the maximum diameters of the first cavity and the third cavity.

5. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: The first cavity and the third cavity have the same structure. The first cavity and the third cavity are symmetrical with respect to the radial plane located at the center of the filter rod body. The first cavity and the third cavity are respectively conical cavities.

6. A cigarette, characterized in that: It comprises the ternary composite filter rod described in any one of claims 1-5.

7. A three-component composite filter rod for cooling and filtering smoke, comprising three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the filter rod near the smoking end is the rear filter rod; characterized in that: The middle section filter rod comprises a filter rod body, and the filter rod body is formed with three cavities arranged along its circumferential direction, namely a first cavity, a second cavity, and a third cavity. The three cavities are independently arranged and run through the entire filter rod body; the first cavity, the second cavity, and the third cavity have the same shape and size, and along the axial direction of the filter rod body, the first cavity, the second cavity, and the third cavity respectively include a cylindrical section and a conical section; along the axial direction of the filter rod body, a fourth cavity is also arranged at the center position of the filter rod body; the fourth cavity is a blind hole, which does not run through the filter rod body, and the fourth cavity includes a cylindrical section and a conical section.

8. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: A cylindrical groove is arranged at each end of the filter rod body, and the first cavity, the second cavity, the third cavity and the fourth cavity all extend from the bottom of the groove to the inside of the filter rod body.

9. The ternary composite filter rod for flue gas cooling and filtering according to claim 1, characterized in that: The length ratio of the cylindrical section to the conical section of the first cavity, the second cavity and the third cavity is 3:2; the fourth cavity occupies 3 / 4 of the total length of the entire filter rod body.

10. A cigarette, characterized in that: It comprises the ternary composite filter rod described in any one of claims 7-9.

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