Cigarette filter assembly and heating device

Abstract

The invention belongs to the technical field of cigarettes, and discloses a cigarette filter assembly and a heating device. The cigarette filter tip assembly comprises a first electrode assembly, a filter tip and a second electrode assembly which are connected in sequence, the first electrode assembly is used for being connected with a cigarette cartridge, and the second electrode assembly is used for being connected with a heating body; wherein the filter tip comprises a filter element, a heating layer arranged outside the filter element in a surrounding mode and outer-layer packaging paper arranged outside the heating layer in a surrounding mode, and the first electrode assembly, the heating layer and the second electrode assembly are electrically connected in sequence. According to the cigarette filter tip assembly and the heating device, due to the fact that the heating layer is additionally arranged outside the filter element, under the heating effect of the heating layer, the temperature in the filter element rises, smoke is not prone to being condensed in the filter element, compared with a filter tip with the condensation condition, obstacles in the filter element are reduced, more smoke is inhaled by a smoker, and the smoke quality is improved. The temperature of the inhaled smoke is closer to the body temperature, meanwhile, due to the fact that the temperature rises, fragrance is released more sufficiently, the layering sense of the fragrance is richer, and the palatability of smoking is improved.

Description

Technical Field

[0001] This invention relates to the field of cigarette technology, and more particularly to a cigarette filter assembly and a heating device. Background Technology

[0002] Heated tobacco products (HNB) release smoke by heating a thin sheet of tobacco in a specially designed cartridge to a specific temperature (usually 250°C-350°C), thus avoiding the large amount of harmful substances produced by traditional combustion. Currently, heated tobacco products on the market mainly focus on heating the tobacco segments in the cartridge.

[0003] However, existing heated cigarettes have the following problems: 1. Condensation of smoke in the filter: When hot smoke flows from the heated tobacco section and passes through the room-temperature filter, the sudden temperature drop causes some components of the smoke (such as glycerin and moisture) to condense in the filter. This not only reduces the efficiency of smoke transmission, resulting in a loss of flavor and increased draw resistance, but may also affect the user experience.

[0004] 2. Insufficient aroma release: Filters usually contain flavor capsules or other flavor carriers. At room temperature, the aroma has limited volatilization efficiency and cannot be fully and evenly mixed with the heated smoke, resulting in insufficient aroma complexity.

[0005] 3. Inconsistent overall experience: The tobacco section is precisely heated, while the filter section is at room temperature, forming a "hot end-cold end" structure. This results in a temperature difference and inconsistency in the sensory experience of the front and back sections during a single puff.

[0006] Therefore, there is an urgent need to design a cigarette filter assembly and a heating device to solve the above problems. Summary of the Invention

[0007] One object of the present invention is to provide a cigarette filter assembly that can keep the filter part warm, ensuring that the temperature of the smoke does not drop significantly after passing through the filter, reducing the occurrence of smoke condensation, allowing for more complete release of aroma, and improving the user experience.

[0008] Another objective of this invention is to provide a heating device capable of heating the filter tip to ensure that the temperature of the smoke does not drop significantly after passing through the filter tip, thereby reducing smoke condensation, allowing for more complete aroma release, and improving the user experience.

[0009] To achieve this objective, the present invention adopts the following technical solution: A cigarette filter assembly includes a first electrode assembly, a filter, and a second electrode assembly connected in sequence. The first electrode assembly is used to connect with a cigarette cartridge, and the second electrode assembly is used to connect with a heating element. The filter tip includes a filter element, a heating layer surrounding the filter element, and an outer packaging paper surrounding the heating layer. The first electrode assembly, the heating layer, and the second electrode assembly are electrically connected in sequence.

[0010] As an alternative, the heating layer includes a base film, a heating circuit, and carbon paste. The heating circuit is printed on the side of the base film facing the filter element, and the carbon paste is coated on the side of the base film facing the filter element. The heating circuit is electrically connected to the first electrode assembly and the second electrode assembly, respectively.

[0011] As an alternative, the heating layer can be made of conductive fibers or conductive powder.

[0012] As an optional solution, the filter tip also includes a heat insulation layer disposed between the heating layer and the outer packaging paper.

[0013] As an alternative, the aforementioned insulation layer can be an aerogel membrane or ceramic fiber paper.

[0014] As an optional solution, the cigarette filter assembly further includes a base segment connected between the first electrode assembly and the filter and forming an internal mounting cavity. A heating element is installed in the mounting cavity, with one end of the heating element connected to the first electrode assembly and the other end of the heating element connected to the heating layer.

[0015] As an alternative, the heating element described above is a resistance wire.

[0016] As an alternative, the aforementioned mounting cavity contains a filter rod, and the aforementioned resistance wire is wound around the filter rod.

[0017] As an alternative, the filter element described above is made of cellulose acetate.

[0018] The heating device includes a heating element and the cigarette filter assembly described above, wherein the second electrode assembly can be plugged into and electrically connected to the heating element.

[0019] The beneficial effects of this invention are: This invention provides a cigarette filter assembly. By adding a heating layer outside the filter core, and electrically connecting the heating layer to a heating element via a second electrode assembly, the heating layer is appropriately heated. After the cigarette cartridge produces smoke, it enters the filter. Under the heating effect of the heating layer, the temperature inside the filter core rises and becomes similar to the temperature of the smoke. The smoke is less likely to condense inside the filter core. Compared to filters where condensation occurs, this filter core has fewer obstacles, allowing more smoke to be inhaled by the smoker. The temperature of the inhaled smoke is also closer to body temperature, resulting in a smaller perceived temperature difference. At the same time, due to the increased temperature, the aroma is released more fully, resulting in a richer aroma profile and improved palatability.

[0020] The present invention also provides a heating device, including a heating element and the above-mentioned cigarette filter assembly, wherein a second electrode assembly can be plugged into and electrically connected to the heating element. By employing the above-mentioned cigarette filter assembly, this heating device can heat the filter portion, ensuring that the temperature of the smoke does not drop significantly after passing through the filter, reducing smoke condensation, allowing for more complete aroma release, and improving the user experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the cigarette filter assembly provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the filter provided in an embodiment of the present invention.

[0022] In the picture: 10. First electrode assembly; 11. Electrode holder; 12. Electrode; 20. Filter tip; 21. Filter element; 22. Heating layer; 23. Outer packaging paper; 24. Heat insulation layer; 30. Second electrode assembly; 40. Base segment; 41. Mounting cavity; 50. Heating element; 60. Filter rod. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0024] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0027] This embodiment provides a cigarette filter assembly that can insulate the filter tip 20, ensuring that the temperature of the smoke does not drop significantly after passing through the filter tip 20, reducing smoke condensation, allowing for more complete aroma release, and improving the user experience. Figure 1 and Figure 2 As shown, the cigarette filter assembly includes a first electrode assembly 10, a filter 20, and a second electrode assembly 30 connected in sequence. The first electrode assembly 10 is used to connect with the cigarette cartridge, and the second electrode assembly 30 is used to connect with the heating element. The filter 20 includes a filter element 21, a heating layer 22 surrounding the filter element 21, and an outer packaging paper 23 surrounding the heating layer 22. The first electrode assembly 10, the heating layer 22, and the second electrode assembly 30 are electrically connected in sequence.

[0028] The aforementioned cigarette filter assembly, by adding a heating layer 22 outside the filter element 21, and electrically connecting the heating layer 22 to the heating element through the second electrode assembly 30, allows the heating layer 22 to be appropriately heated. After the cigarette cartridge produces smoke, it enters the interior of the filter element 20. Under the heating effect of the heating layer 22, the temperature inside the filter element 21 rises, becoming similar to the temperature of the smoke. The smoke is less likely to condense inside the filter element 21. Compared to a filter element 20 where condensation occurs, the obstructions inside the filter element 21 are reduced, allowing more smoke to be inhaled by the smoker. The temperature of the inhaled smoke is also closer to body temperature, resulting in a smaller perceived temperature difference. At the same time, due to the increased temperature, the aroma is released more fully, resulting in a richer aroma profile and improved palatability.

[0029] In an optional embodiment, the heating layer 22 includes a base film, a heating circuit, and carbon paste. The heating circuit is printed on the side of the base film facing the filter element 21, and the carbon paste is coated on the side of the base film facing the filter element 21. The heating circuit is electrically connected to the first electrode assembly 10 and the second electrode assembly 30, respectively. Printing the heating circuit on the base film allows for better utilization of the heating area, resulting in more uniform heating of the entire heating layer 22. The carbon paste coating provides better protection for the heating circuit.

[0030] In an optional embodiment, the heating layer 22 is conductive fiber or conductive powder. The conductive fiber can be pressed into a sheet and then surrounding the filter element 21, while the conductive powder can be uniformly distributed within the conductive fiber to improve heating uniformity.

[0031] Optionally, such as Figure 2 As shown, the filter tip 20 also includes a heat insulation layer 24, which is disposed between the heating layer 22 and the outer packaging paper 23. The heat insulation layer 24 can reduce heat loss, improve thermal efficiency, and prevent burns to the user.

[0032] Optionally, the insulation layer 24 can be an aerogel membrane or ceramic fiber paper. Aerogel membranes have a low thermal conductivity, and due to their excellent insulation performance, they can significantly reduce material thickness while achieving the same insulation effect, thus saving space and reducing weight. In addition to having a low thermal conductivity, ceramic fiber paper possesses good flexibility and high tear resistance, allowing it to closely adhere to complex equipment surfaces, reducing thermal bridging and improving overall insulation performance.

[0033] Optionally, such as Figure 1 As shown, the cigarette filter assembly also includes a base segment 40, which is connected between the first electrode assembly 10 and the filter 20 and forms an internal mounting cavity 41. A heating element 50 is installed in the mounting cavity 41, with one end connected to the first electrode assembly 10 and the other end connected to the heating layer 22. With this configuration, the smoke first passes through the mounting cavity 41, undergoes initial heating within the cavity, and then is reheated a second time through the filter 20, thus improving the thoroughness of the heating process.

[0034] It should be noted that after the tobacco cartridge is installed with the first electrode assembly 10, the smoke flow channel is not shown on the first electrode assembly 10. After passing through the first electrode assembly 10, the smoke enters the mounting cavity 41 and is heated.

[0035] Optionally, such as Figure 1 As shown, the first electrode assembly 10 includes an electrode base 11 and an electrode 12 mounted on the electrode base 11. The end of the electrode base 11 facing away from the electrode 12 is connected to the base segment 40.

[0036] In an alternative embodiment, the heating element 50 is a resistance wire. The resistance wire can be manufactured in a shape that is fully wound in space, which can increase the contact area between the heating element 50 and the flue gas.

[0037] Optionally, such as Figure 1 As shown, the mounting cavity 41 contains a filter rod 60, with a resistance wire wound around the filter rod 60. The filter rod 60 performs primary filtration of the flue gas, and the filter element 21 performs secondary filtration, reducing the impurity content in the flue gas and minimizing its impact on human health.

[0038] Optionally, filter element 21 is made of cellulose acetate. This material has uniform pore size and high porosity, enabling high-flow-rate filtration while effectively trapping impurities such as particles and bacteria.

[0039] Optionally, the heating temperature range of the heating element 50 and the heating layer 22 is between 40℃ and 60℃. Within this temperature range, the temperature of the flue gas after being heated and entering the inlet is relatively moderate, resulting in a better user experience.

[0040] This embodiment also provides a heating device, including a heating element and the aforementioned cigarette filter assembly, wherein the second electrode assembly 30 can be plugged into and electrically connected to the heating element. By employing the aforementioned cigarette filter assembly, this heating device can heat the filter 20 portion, ensuring that the temperature of the smoke does not drop significantly after passing through the filter 20, reducing smoke condensation, allowing for more complete aroma release, and improving the user experience.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cigarette filter assembly, characterized in that, It includes a first electrode assembly (10), a filter (20), and a second electrode assembly (30) connected in sequence. The first electrode assembly (10) is used to connect with the cartridge, and the second electrode assembly (30) is used to connect with the heating element; wherein, The filter tip (20) includes a filter element (21), a heating layer (22) surrounding the filter element (21), and an outer packaging paper (23) surrounding the heating layer (22). The first electrode assembly (10), the heating layer (22), and the second electrode assembly (30) are electrically connected in sequence.

2. The cigarette filter assembly according to claim 1, characterized in that, The heating layer (22) includes a base film, a heating circuit and a carbon paste. The heating circuit is printed on the side of the base film facing the filter element (21), and the carbon paste is coated on the side of the base film facing the filter element (21). The heating circuit is electrically connected to the first electrode assembly (10) and the second electrode assembly (30) respectively.

3. The cigarette filter assembly according to claim 1, characterized in that, The heating layer (22) is made of conductive fiber or conductive powder.

4. The cigarette filter assembly according to claim 1, characterized in that, The filter (20) also includes a heat insulation layer (24), which is disposed between the heating layer (22) and the outer packaging paper (23).

5. The cigarette filter assembly according to claim 4, characterized in that, The heat insulation layer (24) is an aerogel membrane or ceramic fiber paper.

6. The cigarette filter assembly according to any one of claims 1-5, characterized in that, The cigarette filter assembly further includes a base segment (40), which is connected between the first electrode assembly (10) and the filter (20) and forms an installation cavity (41) inside. A heating element (50) is installed in the installation cavity (41), one end of which is connected to the first electrode assembly (10) and the other end of which is connected to the heating layer (22).

7. The cigarette filter assembly according to claim 6, characterized in that, The heating element (50) is a resistance wire.

8. The cigarette filter assembly according to claim 7, characterized in that, The mounting cavity (41) contains a filter rod (60), and the resistance wire is wound around the filter rod (60).

9. The cigarette filter assembly according to any one of claims 1-5, characterized in that, The filter element (21) is made of cellulose acetate.

10. A heating device, characterized in that, Includes a heating element and a cigarette filter assembly as described in any one of claims 1-9, wherein the second electrode assembly (30) can be plugged into and electrically connected to the heating element.

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