A cigarette suitable for electromagnetic heating

Abstract

The present invention discloses a cigarette suitable for electromagnetic heating, comprising a tobacco segment and a magnetic induction element. A plurality of the magnetic induction elements are placed in the tobacco segment, and the spacing between two adjacent magnetic induction elements gradually increases along the direction from the air inlet end of the tobacco segment to the air outlet end of the tobacco segment; the magnetic induction element is provided with a through-type air flow hole, so that the smoke released in the tobacco segment can flow through the magnetic induction element. The present invention packages the heating element and the tobacco shreds synchronously, and does not require the external insertion of the heating element. The tobacco shreds can be evenly heated to release smoke, and the problem of tobacco shreds sticking can be effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco, and in particular relates to a cigarette suitable for electromagnetic heating. Background Art

[0002] At present, electromagnetic heating smoking devices mainly use central heating, with the sensor material as the heating element set in the center of the device, usually in the form of sheets or needles. The heating element is inserted into the cigarette for heating, and sensor particles are set inside the cigarette to assist in heating. This heating method is radial heating, and the central heating element induces heat and transfers heat to the tobacco. The length of the central heating element of this heating method cannot completely match the length of the tobacco segment, and there will be problems such as uneven heating and tobacco sticking to the heating element. Summary of the invention

[0003] The purpose of the present invention is to provide a cigarette suitable for electromagnetic heating, in which a heating element and tobacco are packaged synchronously, and no external heating element is required. The tobacco can be evenly heated to release smoke, and the problem of tobacco sticking can be effectively avoided.

[0004] The technical solution adopted by the present invention to solve its technical problem is to propose a cigarette suitable for electromagnetic heating, including a tobacco segment and a magnetic induction element. A plurality of the magnetic induction elements are placed in the tobacco segment, and the distance between two adjacent magnetic induction elements gradually increases from the air inlet end of the tobacco segment to the air outlet end of the tobacco segment; the magnetic induction element is provided with a through-type air flow hole, so that the smoke released in the tobacco segment can flow through the magnetic induction element.

[0005] Furthermore, it also includes a filter segment, which includes at least a hollow segment, a cooling segment, and a filament segment. The front end of the hollow segment is connected to the air outlet end of the tobacco segment, and the rear end of the hollow segment is connected to the cooling segment. The filament segment is placed behind the cooling segment; the filament segment is the suction end of the cigarette.

[0006] Furthermore, it also includes outer paper, and the filter segment and the tobacco segment are covered with the outer paper; the outer annular wall of the magnetic induction component is connected to the inner side of the outer paper at the tobacco segment.

[0007] Furthermore, the smoke-generating body and the magnetic induction element in the tobacco segment are molded by wrapping with a heat insulation layer, and the outer ring wall of the magnetic induction element is connected to the inner side of the heat insulation layer; the outside of the heat insulation layer is wrapped with outer paper.

[0008] Furthermore, the hollow section includes an outer ring body and a hollow cavity, and the outer ring body and the hollow cavity are coaxially arranged; the outer ring body is filled with a filter body.

[0009] Furthermore, a plurality of magnetic induction elements are arranged in parallel inside the tobacco segment, and the magnetic induction elements are perpendicular to the overall flow direction of the airflow in the tobacco segment.

[0010] Furthermore, the magnetic induction component includes a base ring and a heating element, and the heating element is installed in the inner ring wall of the base ring; the base ring is made of non-magnetic induction material, and the heating element is made of magnetic induction material.

[0011] Furthermore, the heating element is a wire mesh structure, and the annular edge of the wire mesh structure is fixedly connected to the base ring.

[0012] Furthermore, the heating element is a circular plate, a plurality of through holes are provided on the circular plate as air flow holes, and the annular edge of the circular plate is fixedly connected to the base ring; the shape of the through holes can be a circular hole, annular strip hole, etc.

[0013] Furthermore, the heating structure of the magnetic induction element does not come into direct contact with the filter segment.

[0014] Furthermore, the plurality of magnetic sensing elements divide the tobacco segment into at least two segments.

[0015] The beneficial effects of the present invention are:

[0016] The present invention proposes a cigarette suitable for electromagnetic heating, in which heating elements are arranged in tobacco within a tobacco segment according to a certain rule. When the smoking device applies a magnetic field to the cigarette, the heating elements can generate heat to heat the surrounding tobacco / smoke-generating body, thereby precipitating smoke. The distribution of the heating elements can effectively heat the tobacco in each area, and each cigarette can be used independently, which can completely avoid the adhesion of the tobacco to the heating element of the device.

[0017] The distribution of the heating elements is related to the filling density of the material in the tobacco segment. The distribution spacing of the heating elements gradually increases from the air inlet end to the air outlet end; that is, the distribution spacing of the heating elements gradually increases along the flow direction of the airflow.

[0018] The heating element can be placed in a cross-sectional manner in the flow direction of the airflow in the tobacco segment, and multiple airflow holes are arranged on the heating element, which has little effect on the flow of the airflow inside the tobacco segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0020] Figure 1 This is a structural diagram of a cigarette suitable for electromagnetic heating according to an embodiment of the present invention;

[0021] Figure 2 A front view of a magnetic induction element provided by an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the composition of a magnetic sensing element suitable for electromagnetically heated cigarettes according to an embodiment of the present invention;

[0023] Figure 4 The figure is a schematic diagram of the distribution of magnetic induction components in a tobacco segment of a cigarette suitable for electromagnetic heating according to an embodiment of the present invention.

[0024] In the figure: 1, tobacco section; 2, hollow section; 3, cooling section; 4, tow section; 5, magnetic induction element; 6, base ring; 7, heating element; 8, outer paper; 9, smoke-generating element; 21, outer ring body; 22, hollow cavity. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the design orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0026] The embodiment of the present invention provides a cigarette suitable for electromagnetic heating, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , mainly including a tobacco segment 1 and a magnetic induction member 5. Multiple magnetic induction members 5 are placed in the tobacco segment 1, and the distance between two adjacent magnetic induction members 5 gradually increases from the air inlet end to the air outlet end of the tobacco segment 1; a through-type air flow hole is arranged on the magnetic induction member 5, so that the smoke released in the tobacco segment 1 can flow through the magnetic induction member 5.

[0027] It should be clear that the basic structure of the cigarette should also include a filter segment, and the filter segment and the tobacco segment 1 can be wrapped by an outer paper 8 to form a cigarette.

[0028] The filter section at least includes a hollow section 2, a cooling section 3, and a filament section 4. The front end of the hollow section 2 is connected to the air outlet end of the tobacco section 1, and the rear end of the hollow section 2 is connected to the cooling section 3. The filament section 4 is placed behind the cooling section 3. Among them, the filament section 4 is the suction end of the cigarette.

[0029] The hollow section 2 includes an outer ring body 21 and a hollow cavity 22. The outer ring body 21 and the hollow cavity 22 are arranged coaxially; a filter body is filled in the outer ring body 21. The filter body can be a tow rod made of acetate fiber. The filling material in the tow section 4 can be the same as the filling material of the outer ring body 21.

[0030] It is understood that after the various structures of the filter tip segment are butted, they can be overmolded by additional coating materials to form a complete filter tip segment. The formed filter tip segment is butted with the tobacco segment 1 and then overmolded by the outer paper 8.

[0031] For the tobacco segment 1, there is a heating structure inside the tobacco segment 1. In the embodiment of the present invention, the heating structure is in contact with the smoke-generating body 9 and can also be in contact with the formed package of the tobacco segment 1. When the heating structure is in contact with the formed package, there is a risk of overheating and carbonization. Therefore, in the embodiment of the present invention, the heating structure in the magnetic induction member 5 is structurally restricted so that it does not directly contact the cigarette structure other than the smoke-generating body 9.

[0032] Specifically, the magnetic induction component 5 includes a base ring 6 and a heating element 7, and the heating element 7 is installed in the inner ring wall of the base ring 6. The base ring 6 is made of a non-magnetic material, preferably a material with a heat insulation effect; the heating element 7 is made of a magnetic material, such as iron, iron-nickel-zinc alloy, ferritic stainless steel, martensitic stainless steel, and austenitic stainless steel.

[0033] When heating, the heating area of ​​the heating element 7 is limited to the inner side of the base ring 6, and does not directly contact the easily carbonized structure of the cigarette. Specifically, the heating element 7 does not directly contact the filter segment, the heating element 7 is not arranged on the rear end surface of the tobacco segment 1, and the hollow segment 2 directly connects with the smoke generating body 9 at the rear end of the tobacco segment 1.

[0034] As for the forming method of the tobacco segment 1, the tobacco segment 1 can be formed independently first, and then connected with the filter segment to form a cigarette; it can also be formed together with the formed filter segment to form a cigarette.

[0035] When the tobacco segment 1 is formed independently: similar to the composition of the filter segment, the smoke-generating body 9 and the magnetic induction component 5 can be formed into an integrated structure first, and then connected with the filter segment for forming. Specifically, the heat-insulating material can be used to make the heat-insulating layer, and the smoke-generating body 9 and the magnetic induction component 5 are first coated by the heat-insulating layer to achieve the forming of the tobacco segment 1, and then the tobacco segment 1 and the filter segment are coated and formed by the outer paper 8 to form a cigarette, and the outer paper 8 is the second coating.

[0036] Based on the structural characteristics of the magnetic sensing element 5, the outer ring wall of the magnetic sensing element 5 is in direct contact with the inner side of the heat insulation layer, and can be set as a fixing device to determine that the position of the magnetic sensing element 5 does not change. Specifically, the outer ring wall of the base ring 6 is fixed to the inner side of the heat insulation layer, and the position of the base ring 6 in the tobacco segment 1 is determined, and the position of the heating element 7 can be determined synchronously.

[0037] When the tobacco segment 1 is not formed independently: the tobacco segment 1 and the formed filter segment can be directly wrapped with the outer paper 8. The tobacco segment 1 mainly includes the smoke-generating body 9 and the magnetic sensing component 5. After the distribution and arrangement of the smoke-generating body 9 and the magnetic sensing component 5 are completed, the smoke-generating body 9, the magnetic sensing component 5 and the formed filter segment can be wrapped with the outer paper 8 to form a cigarette. In this case, the tobacco segment 1 has only one layer of wrapping structure, and the complexity of the production process of the cigarette is low.

[0038] Based on the structural characteristics of the magnetic induction element 5, the outer ring wall of the magnetic induction element 5 is connected to the inner side of the outer paper 8 at the tobacco segment 1, that is, the outer ring wall of the base ring 6 is connected to the inner side of the outer paper 8, which can be fixed, thereby determining the position of the magnetic induction element 5 so that it no longer changes. At the same time, when the heating element 7 is heating, the base ring 6 between the outer paper 8 can effectively insulate the heat, so that the outer paper 8 is not heated and carbonized.

[0039] See also Figure 1 , multiple magnetic sensing elements 5 are placed in parallel inside the tobacco segment 1, and the magnetic sensing elements 5 can be arranged perpendicular to the overall flow direction of the airflow in the tobacco segment 1, and the magnetic sensing elements 5 are placed in the tobacco segment 1 in a cross-sectional manner. The tobacco segment 1 can be divided into multiple sections with the magnetic sensing element 5 as the dividing line. Based on practical considerations, the magnetic sensing element 5 is not suitable for direct contact with the filter segment, therefore, the magnetic sensing element 5 cannot be arranged on the end face of the tail end of the tobacco segment 1; the magnetic sensing element 5 can be located on the end face of the front end of the tobacco segment 1, then when there are multiple magnetic sensing elements 5 in the tobacco segment 1, the tobacco segment 1 must be divided into at least two sections. In the attached drawings of the present invention, there are four magnetic sensing elements 5, which can divide the tobacco segment 1 into five sections.

[0040] In the embodiment of the present invention, the basic structure of the heating element 7 can be circular. Figure 2 , Figure 3 There are many ways to implement the heating element 7:

[0041] The heating element 7 is a wire mesh structure, and the annular edge of the wire mesh structure is fixedly connected to the base ring 6. The mesh diameter on the wire mesh structure is the air flow hole. Specifically, the wire mesh thickness is between 0.1mm-3mm, and the mesh number of the wire mesh is between 6-40 meshes.

[0042] The heating element 7 is a circular plate, and a plurality of through holes are provided on the circular plate as air flow holes, and the annular edge of the circular plate is fixedly connected to the base ring 6. The through holes may be in the shape of circular holes, annular strip holes, etc. Specifically, the thickness of the circular plate is between 0.1 mm and 3 mm, the diameter of the circular holes is between 0.3 and 3 mm, and the gap of the annular strip holes is between 0.1 mm and 1 mm. In terms of distribution, the circular holes may be evenly distributed; the annular strip holes may be provided with multiple inner and outer annular strip holes around the center position.

[0043] It is understandable that the smoke body 9 can be tobacco or other smoke-generating materials. When filling the smoke body 9, the filling density of the smoke body 9 in the tobacco segment 1 should be roughly the same at all places, so that when the heating element 7 generates heat, the heat can be diffused to the surrounding smoke body 9 in a relatively uniform mode.

[0044] Based on the actual smoking conditions, when smoking, the air flow enters from the air inlet end of the tobacco segment 1 and flows out from the air outlet end of the tobacco segment 1. The flow of the air flow will have a certain degree of influence on the heat radiation of the heating element 7. When the air flow flows, it drives part of the heat to dissipate and transfer in the direction of the flow, causing the heat radiation of each heating element 7 to be offset toward the flow direction of the air flow as a whole.

[0045] When the heat generating power of the heating element 7 is constant and the airflow is stable, considering the natural dissipation of heat, the heat distribution will tend to a stable state after passing through a certain number of spacings of the heating element 7. However, in the embodiment of the present invention, the length of the tobacco segment 1 is short and the suction airflow is intermittent. Therefore, as long as suction occurs, the heat radiation of the heating element 7 in the tobacco segment 1 will be offset backward to a certain extent.

[0046] When the heat is applied intermittently during the inhalation, the tobacco area at the rear contacts the high-temperature smoke flowing through, which will produce a certain preheating effect, which is beneficial for the heating element 7 to heat and separate out the smoke. Therefore, the spacing between the heating elements 7 arranged at the rear can be gradually increased.

[0047] See also Figure 4 , a, b, c, d are all magnetic induction parts 5, a1, b1, c1, d1 are the heat radiation areas of a, b, c, d respectively; the appearance of heat radiation offset is: the heat radiation area a1 of a is divided into two parts by the plate body of a, and the heat radiation area in front of the plate body of a is smaller than the heat radiation area in the back. Similarly, the heat radiation area b1 of b is divided into two parts by the plate body of b, and the heat radiation area in front of the plate body of b is smaller than the heat radiation area in the back. The heat radiation area offset of c and b is the same. Finally, the rear smoke body 9 of d contacts the hollow section, and the heat loss is accelerated.

[0048] Therefore, when filling the smoke-generating body 9, the spacing of the magnetic induction members 5 can be set accordingly according to the offset of the heat radiation area. In the present invention, the spacing between two adjacent magnetic induction members 5 gradually increases along the overall flow direction of the airflow, so that the magnetic induction members 5 distributed in the tobacco segment 1 can be responsible for the heating and precipitation of smoke from smoke-generating bodies 9 of different volumes while having basically the same heating efficiency.

[0049] Specifically, k1 is the distance between a and b, k2 is the distance between b and c, k3 is the distance between c and d, and k1>k2>k3. The smoke body 9 in front of a contacts the outside air first, and its heat dissipates faster. Therefore, the filling amount of the smoke body 9 in front of a can be set relatively small, so that a can completely heat the smoke body 9 in front when it is heated; the filling amount of the smoke body 9 behind d can be set relatively small to optimize the heating effect of d.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0051] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation modes, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A cigarette suitable for electromagnetic heating, characterized in that: The invention comprises a tobacco segment (1) and a magnetic sensing element (5), wherein a plurality of the magnetic sensing elements (5) are arranged in the tobacco segment (1), and the distance between two adjacent magnetic sensing elements (5) gradually increases along the direction from the air inlet end of the tobacco segment (1) to the air outlet end of the tobacco segment (1); the magnetic sensing element (5) is provided with a through-type air flow hole, so that the smoke released in the tobacco segment (1) can flow through the magnetic sensing element (5); A plurality of magnetic sensing elements (5) are arranged in parallel inside the tobacco segment (1), and the magnetic sensing elements (5) are perpendicular to the overall flow direction of the airflow inside the tobacco segment (1); The magnetic induction element (5) comprises a base ring (6) and a heating element (7), wherein the heating element (7) is installed in the inner ring wall of the base ring (6); the base ring (6) is made of a non-magnetic induction material, and the heating element (7) is made of a magnetic induction material; The heating element (7) is a wire mesh structure, the annular edge of the wire mesh structure is fixedly connected to the base ring (6); the heating element (7) is a circular plate, a plurality of through holes are provided on the circular plate as air flow holes, and the annular edge of the circular plate is fixedly connected to the base ring (6).

2. A cigarette suitable for electromagnetic heating according to claim 1, characterized in that: The cigarette further comprises a filter section, wherein the filter section comprises a hollow section (2), a cooling section (3), and a filament section (4); the front end of the hollow section (2) is connected to the air outlet end of the tobacco section (1), the rear end of the hollow section (2) is connected to the cooling section (3), and the filament section (4) is arranged behind the cooling section (3); the filament section (4) is the suction end of the cigarette.

3. A cigarette suitable for electromagnetic heating according to claim 2, characterized in that: It also comprises outer paper (8), the filter segment and the tobacco segment (1) being covered by the outer paper (8); the outer annular wall of the magnetic induction element (5) is connected to the inner side of the outer paper (8) at the tobacco segment (1).

4. A cigarette suitable for electromagnetic heating according to claim 2, characterized in that: The hollow section (2) comprises an outer ring body (21) and a hollow cavity (22); the outer ring body (21) and the hollow cavity (22) are coaxially arranged; and a filter body is filled in the outer ring body (21).

5. The cigarette suitable for electromagnetic heating according to claim 1, characterized in that: The heating structure of the magnetic induction element (5) does not come into direct contact with the filter segment; and the plurality of magnetic induction elements (5) divide the tobacco segment (1) into at least two segments.

6. The cigarette suitable for electromagnetic heating according to claim 1, characterized in that: The smoke-generating body (9) in the tobacco segment (1) and the magnetic induction element (5) are molded by wrapping with a heat insulation layer, and the outer ring wall of the magnetic induction element (5) is connected to the inner side of the heat insulation layer; the outside of the heat insulation layer is coated with outer paper (8).

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