CN114504121B - Tobacco product and preparation method thereof - Google Patents

Abstract

The invention relates to a tobacco product and a preparation method thereof. The tobacco product can generate aerosol under the microwave condition, and comprises tobacco, an aerosol forming agent and functional particles, wherein the functional particles can absorb microwaves and can convert the absorbed microwaves into heat energy and then transmit the heat energy to the tobacco and the aerosol forming agent. The aerosol-generating rate of the tobacco product is relatively high.

Description

Tobacco product and preparation method thereof

Technical Field

The invention relates to the technical field of tobacco products, in particular to a tobacco product and a preparation method thereof.

Background

The heating non-combustible smoking article is mainly a smoking article which is used for low-temperature baking tobacco-containing tobacco products at 200-400 ℃ to generate aerosol. The heating of the non-combustible smoking set does not directly burn the tobacco product, but releases aerosol by heating the tobacco product, thereby reducing harmful components generated by pyrolysis of the tobacco product.

At present, a heating non-combustion smoking set is mainly matched with tobacco products made of waste tobacco materials such as tobacco dust, tobacco stems, crushed tobacco flakes and the like in the cigarette process as raw materials through a heating body (such as a heating plate or a heating rod). However, current tobacco products are used at a slower rate of aerosol generation.

Disclosure of Invention

Based on this, it is necessary to provide a tobacco product capable of improving the aerosol-generating rate and a method for preparing the same.

A tobacco product capable of generating an aerosol under microwave conditions, the tobacco product comprising tobacco, an aerosol former and functional particles, the functional particles being capable of absorbing microwaves and of converting the absorbed microwaves into thermal energy for delivery to the tobacco and the aerosol former.

The tobacco product is suitable for microwave heating, the functional particles absorb microwaves and convert the absorbed microwaves into heat energy to be transmitted to the hot aerosol forming agent and the tobacco, and meanwhile, the functional particles can reflect the microwaves, so that other components capable of absorbing the microwaves in the tobacco product are heated due to the absorption of the microwaves, and aerosol is formed. Of course, the functional particles may absorb the microwave to raise the temperature, and then transfer the heat to the tobacco product to generate aerosol. It has been verified that the aerosol generation rate of the tobacco product is faster than that of the conventional method in which the aerosol is generated by transferring heat to the tobacco product after the heat generation by the heating element.

In one embodiment, the part of the tobacco is 40-98 parts, the part of the aerosol forming agent is 1-55 parts, and the part of the functional particles is 1-55 parts.

In one embodiment, the functional particles comprise a wave-absorbing material selected from the group consisting of silicon carbide, znO, carbon, fe ₂ O ₃ Fe (Fe) ₃ O ₄ At least one of them.

In one embodiment, the functional particles are porous materials.

In one embodiment, the functional particles are fibrous materials.

In one embodiment, the functional particles have a particle size of no more than 100 μm.

In one embodiment, the functional particles have a particle size of 2.5 μm to 100 μm.

In one embodiment, the functional particles have a particle size of 10 μm to 60 μm.

In one embodiment, the aerosol former comprises propylene glycol.

In one embodiment, the aerosol-former further comprises a nicotinic compound selected from at least one of nicotine and a nicotine salt.

In one embodiment, the mass percentage of the nicotine compound in the aerosol former is 0.1% -33%.

A method of making a tobacco product comprising the steps of:

and mixing the tobacco, the aerosol forming agent and the functional particles to prepare a tobacco product, wherein the functional particles are used for absorbing microwaves, and can convert the absorbed microwaves into heat energy and then transmit the heat energy to the tobacco and the aerosol forming agent.

Drawings

FIG. 1 is a schematic plan sectional view of an electronic atomizing device according to an embodiment;

FIG. 2 is a schematic plan sectional view of the electronic atomizing device shown in FIG. 1 after being incorporated into a tobacco product;

FIG. 3 is a schematic view of a partial perspective cross-sectional structure of an electronic atomizing device according to an embodiment;

fig. 4 is a schematic diagram of a simulation of microwave distribution of a tobacco product in an atomization chamber;

fig. 5 is an enlarged partial schematic view of a tobacco product according to an embodiment.

Detailed Description

The present invention will be described more fully hereinafter in order to facilitate an understanding of the invention, which may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. When the terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," and the like are used to indicate an orientation or a positional relationship, they are based on the orientation or positional relationship shown in the drawings, for convenience of description only, and do not indicate or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In this context, cut tobacco refers to filaments made from natural tobacco leaves; the tobacco sheet is regenerated tobacco leaf prepared from waste tobacco materials such as tobacco powder, tobacco stems, crushed tobacco flakes and the like in the cigarette process; without particular description, microwaves refer to electromagnetic waves having a frequency of 300MHz to 3000GHz, which is a short term for a limited frequency band in radio waves, that is, electromagnetic waves having a wavelength of 0.1 mm to 1 meter.

An embodiment of the invention provides a tobacco product which can quickly generate aerosol under the microwave condition. Specifically, the tobacco product is a heating non-burning tobacco product, and aerosol can be formed under the microwave of 915 MHz-30 GHz. The tobacco product comprises tobacco, aerosol forming agent and functional particles, wherein the functional particles can absorb microwaves and convert the absorbed microwaves into heat energy to be transferred to the aerosol forming agent and the tobacco, and meanwhile, the functional particles can reflect the microwaves so that other components capable of absorbing the microwaves in the tobacco product can be heated due to the absorption of the microwaves, so that aerosol is formed.

Tobacco is used as an essential component in the tobacco products, including base tobacco. Optionally, the base tobacco is selected from at least one of cut tobacco and tobacco sheet. In an alternative specific example, the base tobacco is a blend of cut filler and tobacco sheet. Of course, the ratio of the cut tobacco to the tobacco sheet can be adjusted according to actual needs.

Optionally, the tobacco in the tobacco product further comprises at least one of a spice and an inorganic filler. The flavor is added into tobacco, so that the taste of the tobacco product can be enriched. The inorganic filler added in the tobacco has a certain supporting effect on the basic tobacco, and is convenient for shaping. Of course, the types and amounts of the perfume and the inorganic filler may be selected and adjusted according to actual needs.

Aerosol formers are used to form aerosols. Optionally, the aerosol former comprises propylene glycol. Of course, the aerosol former adheres to tobacco to some extent. Further, the aerosol-former contains a substance having excellent microwave absorption performance. Substances with good microwave absorption can be gasified rapidly by directly absorbing microwaves, so that smoke is generated, and heating is realized without burning. Specifically, a substance having good microwave absorption performance has a loss tangent to microwaves of a specific wavelength of more than 0.1. Further, the mass percentage of the substances with good microwave absorption performance in the aerosol forming agent is 1-50%.

In an aerosol-forming agent containing a substance having good microwave absorption performance, smoke is mainly generated by boiling/evaporation of the substance having good microwave absorption performance, and the highest temperature is the boiling point of the substance having good microwave absorption performance, so that self-temperature control can be realized, and therefore, a temperature control member is not required. Of course, the ability of the tobacco product to absorb microwaves is reduced with the reduction of the amount of the substance with good microwave absorption performance, and after the substance with good microwave absorption performance is completely released, the ability of the tobacco product to absorb microwaves is greatly reduced, and the tobacco product cannot continuously and effectively absorb microwave energy to heat, so that adverse phenomena such as scorching and the like are not easy to occur. And experiments show that the smoking life of the tobacco product has a threshold value, before the threshold value, the tobacco product has good taste, and the active ingredients are fully released, but after the threshold value is exceeded, the life of the whole tobacco product is expired, the active ingredients are released completely, and the taste is poor. Therefore, the smoking life of the tobacco product can be precisely controlled by the addition amount of a substance having good microwave absorbing performance (such as propylene glycol) and the number of smoking ports. Furthermore, it is possible to provide a device for the treatment of a disease. The microwave heating has the characteristics of uniformity and temperature gradient from inside to outside, and the problem of insufficient tobacco heating like a central heating device does not exist.

Optionally, the aerosol former contains at least one of propylene glycol and glycerol. Further, the aerosol forming agent contains propylene glycol, and the mass percentage of the propylene glycol is 1-50%. In an alternative specific example, the mass percent of propylene glycol in the aerosol former is 2%, 5%, 10%, 15%, 20%, 35%, or 45%. Further, the mass percentage of the propylene glycol in the aerosol forming agent is 5-15%.

In some embodiments, the aerosol former further comprises a nicotinic compound. The problem of poor taste of tobacco products caused by poor quality of tobacco leaves can be solved by adding the nicotine compound. Of course, the problem of inconsistent taste of tobacco products caused by different batches of tobacco leaves can also be improved by adding the nicotine compound. Specifically, the nicotine compound is at least one selected from nicotine and nicotine salt. Further, the mass percentage of the nicotine compound in the aerosol forming agent is 0.1% -33%. In an alternative specific example, the mass percent of the nicotinic compound in the aerosol former is 0.1%, 2%, 8%, 10%, 15%, 20%, 25%, or 33%. Of course, in some embodiments, the aerosol former may also contain non-tobacco flavoring agents. Optionally, the non-tobacco flavoring agent is selected from at least one of an alcoholic flavoring agent (e.g., menthol) and an aldehyde flavoring agent (e.g., melon aldehyde). Of course, in other embodiments, the non-tobacco flavoring is not limited to the above, and other non-tobacco flavoring may be used.

The functional particles in the tobacco product have at least the following functions: (1) The microwaves are reflected, so that substances with good microwave absorption performance (such as propylene glycol, glycerol and the like) in the tobacco products can receive more microwaves, and the substances with good microwave absorption performance can absorb more microwaves; (2) Absorbs microwaves and rapidly heats up, heating the tobacco and aerosol former in its vicinity.

Specifically, the functional particles include a wave-absorbing material having a dielectric loss tangent or hysteresis loss tangent of more than 0.1. Optionally, the wave absorbing material is selected from silicon carbide, znO, carbon powder, fe ₂ O ₃ Fe (Fe) ₃ O ₄ At least one of them.

In some embodiments, the functional particles are particulate in shape, and the functional particles have a particle size of no more than 100 μm. Alternatively, the functional particles have a particle size of 2.5 μm, 10 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm or 100 μm. Further, the functional particles have a particle diameter of 2.5 μm to 100. Mu.m. Further, the functional particles have a particle diameter of 10 μm to 60. Mu.m.

In some embodiments, the functional particles are porous materials. In other embodiments, the functional particles are fibrous materials.

In some embodiments, the surface of the functional particles is roughened. Roughening the surface of the functional particles can prevent bumping, and is beneficial to fully atomizing tobacco and aerosol forming agents. In an alternative specific example, the functional particles are silicon carbide particles. Further, the functional particles are silicon carbide particles having a porous structure. It is understood that in other embodiments, the shape of the functional particles is not limited to a granular shape, but may be other shapes. For example, filiform, etc.

In some embodiments, the tobacco product is in the form of a sheet, sphere, or ellipsoid. Of course, in other embodiments, the shape of the tobacco product is not particularly limited, and other possible shapes are also possible.

In some embodiments, the tobacco is 40-98 parts by mass, the aerosol former is 1-55 parts by mass, and the functional particles are 1-55 parts by mass.

In some embodiments, the tobacco is 40-90 parts by mass, the aerosol former is 5-55 parts by mass, and the functional particles are 5-55 parts by mass.

In some embodiments, the tobacco is 40-90 parts by mass, the aerosol former is 5-55 parts by mass, and the functional particles are 15-45 parts by mass.

In some embodiments, the tobacco is 60 to 90 parts by mass, the aerosol former is 10 to 55 parts by mass, and the functional particles are 10 to 40 parts by mass.

In some embodiments, the tobacco is 60 to 70 parts by mass, the aerosol former is 10 to 25 parts by mass, and the functional particles are 15 to 25 parts by mass.

The tobacco product has at least the following advantages:

(1) The tobacco product comprises tobacco, aerosol forming agent and functional particles, and can rapidly generate aerosol by utilizing 915 MHz-30 GHz microwaves. The aerosol can be generated within 1s, the smoke quantity of the aerosol generated in 4s is far greater than that of the aerosol generated in 4s of the traditional heating non-burning tobacco products, and the heating is not needed for 20s.

(2) The aerosol generation efficiency is high: a substance (for example, propylene glycol) having a good microwave absorption property in the aerosol-forming agent can directly absorb microwaves and gasify the substances to generate aerosol, and the aerosol generation efficiency is high.

(3) The utilization rate of tobacco is high: the uniformity and the temperature gradient of microwave heating are from inside to outside, so that the problem of insufficient tobacco is avoided, and the utilization rate of the tobacco is improved.

(4) The later maintenance is simple: when the tobacco product is used, the aerosol is generated by utilizing microwaves, a central heating device is not needed, the cleaning of the central heating device is naturally avoided, and the later maintenance is simple.

The invention also provides a preparation method of the tobacco product, which comprises the following steps:

and mixing the tobacco, the aerosol forming agent and the functional particles to prepare the tobacco product.

Specifically, the specific composition and amounts of tobacco, aerosol former and functional particles are as described above and are not described in detail herein. In addition, in some embodiments, the mixing of the tobacco, aerosol-former, and functional particles further comprises shaping the mixture of the tobacco, aerosol-former, and functional particles. In particular, the molding process may employ a molding process commonly used in the art.

The preparation method of the tobacco product is simple and convenient, and is easy for industrial production.

Referring to fig. 1, fig. 2, and fig. 3, the electronic atomizing device 10 according to an embodiment of the present invention further includes a microwave atomizer 20 and a power source 30, wherein the microwave atomizer 20 and the power source 30 are connected to each other, the power source 30 is capable of supplying power to the microwave atomizer 20 through a lithium battery, and an aerosol generating substrate located in the microwave atomizer 20 is capable of generating heat and atomizing to form an aerosol under the action of microwaves, and the aerosol is substantially a kind of smoke that can be inhaled by a user. The microwave atomizer 20 includes a housing 100, a shielding assembly 200, a mouthpiece 320, and a microwave generating unit 310.

In some embodiments, the housing 100 includes a casing 110 and a metal layer 120, the metal layer 120 is wrapped in the casing 110, a mounting hole 111 communicating with the outside is formed on the casing 110, and an atomization cavity 121 is formed around the metal layer 120, where the atomization cavity 121 is communicated with the mounting hole 111. For example, the housing 110 may be made of a non-metal material such as plastic, at this time, a cavity may be first opened in the housing 110, the cavity is communicated with the mounting hole 111, then the metal layer 120 may be attached to an inner wall surface of the cavity by electroplating, after the metal layer 120 is formed, the metal layer 120 encloses the remaining portion of the cavity to form the atomization cavity 121, and a cross section of the atomization cavity 121 may be circular, elliptical or regular polygon. For another example, the housing 110 may be made of a metal material, and the metal material may be completely the same as that of the metal layer 120, and at this time, the housing 110 and the metal layer 120 may be integrally formed, that is, the entire housing 100 is made of the same metal material.

The microwave generating unit 310 is disposed in the housing 110 and outside the atomizing chamber 121, and the microwave generating unit 310 may employ a miniaturized solid-state microwave semiconductor chip unit, so that the volume of the microwave generating unit 310 may be reduced as much as possible, so that the installation space occupied by the microwave generating unit 310 is reduced, thereby reducing the total volume of the microwave atomizer 20 and the entire electronic atomizing apparatus 10. The metal layer 120 is provided with a transmission channel 124, the transmission channel 124 is communicated with the atomization cavity 121, and microwaves generated by the microwave generating unit 310 enter the atomization cavity 121 through the transmission channel 124. The cross-section of the transfer channel 124 may be circular, oval, racetrack-shaped, regular polygonal, etc.

The aerosol-generating substrate is a solid tobacco product 40, the tobacco product 40 is accommodated in the atomizing chamber 121, and the tobacco product 40 contains a wave-absorbing material. When the microwave generating unit 310 emits microwaves into the atomization cavity 121 through the transmission channel 124, the microwave absorbing material can absorb microwaves in the atomization cavity 121, so that dipole molecules of the microwave absorbing material generate high-frequency reciprocating vibration under the action of the microwaves to form internal friction, and finally the tobacco product 40 generates heat under the action of the internal friction, and the tobacco product 40 absorbs the heat to be atomized to form smoke. Referring to fig. 5, in some embodiments, the composition of the tobacco product 40 is as described above, including the tobacco 410, the aerosol-forming agent 420, and the functional particles 430, the functional particles 430 being capable of absorbing microwaves and converting the absorbed microwaves into thermal energy for delivery to the tobacco 410 and the aerosol-forming agent 420. In the tobacco product 40, the tobacco 410, the aerosol-former 420, and the functional particles 430 are uniformly dispersed.

If heating is performed by using a heating sheet that penetrates the tobacco product 40, the heating method has at least the following drawbacks: (1) the temperature control precision of the heating plate is poor, and when the temperature of the heating plate is higher than the atomization temperature of the tobacco product 40, a great amount of harmful substances are generated by the tobacco product 40 at a higher temperature, so that the harm to human health is formed. (2) The heating sheet heats the tobacco product 40 by adopting a heat conduction mode, when the tobacco product 40 absorbs the heat of the heating sheet and rises to the atomization temperature, the heating process lasts about twenty seconds, namely, a user needs to wait at least twenty seconds to suck the smoke, so that the tobacco product 40 can not rise to the atomization temperature quickly in a short time to atomize the smoke, and the sensitivity of the whole electronic atomization device 10 to the user suction response is affected. (3) Because the heating plate pierces the tobacco product 40, the edge part of the tobacco product 40 is far away from the heating plate relative to the central part, the heat of the heating plate is conducted from the central part to the edge part, the central part firstly reaches the atomization temperature due to earlier heat absorption, but the edge part later absorbs the heat and then reaches the atomization temperature, so that the tobacco product 40 is heated unevenly, and the parts can not be guaranteed to reach the atomization temperature simultaneously to be atomized to form smoke, thereby influencing the concentration and taste of the smoke. Also, the central portion of the tobacco product 40 may burn due to excessive temperatures, resulting in a burnt smell in the smoke. (4) The heating plate has complex process, low yield and difficult quality control, so that the manufacturing cost of the heating plate is high. And, the heat patch is easily broken to cause the entire electronic atomizing device 10 to fail. Furthermore, the heating sheet reacts with the tobacco product 40 at high temperature to generate smoke dust, which generates burnt smell and toxic gas after absorbing heat, affecting smoke taste and endangering human health.

For the microwave atomizer 20 of the above embodiment, the tobacco product 40 absorbs the microwaves to generate heat under the action of the intramolecular friction force, so at least the following beneficial effects are formed: (1) the energy of the microwaves is easy to be precisely controlled, so that the deviation of the temperature formed after the tobacco product 40 is heated relative to the atomization temperature is small, partial substances in the tobacco product 40 are prevented from generating chemical reaction at a higher temperature to form a large number of harmful substances, the harmful substances carried by the smoke are prevented from being absorbed by human bodies to generate health hazards, and the safety of the microwave atomizer 20 and the electronic atomization device 10 is ensured. (2) In view of the fact that heat is generated by the intramolecular friction force, the tobacco product 40 can quickly rise to the atomization temperature in a short time to atomize and form smoke, the heating time is extremely short and is about one second, long waiting time caused by long heating time is eliminated, and the sensitivity of the whole electronic atomization device 10 to the user suction response is improved. (3) Molecules of each part in the tobacco product 40 vibrate simultaneously to generate internal friction force, so that the inner part and the outer part of the tobacco product 40 are simultaneously raised to atomization temperature to be atomized simultaneously, the inner part and the outer part of the tobacco product 40 are ensured to be heated uniformly, reasonable concentration and taste of smoke are ensured, the burnt smell and toxic gas generated by the tobacco product 40 due to overhigh local temperature can be prevented, and the taste and safety of the smoke are further improved. (4) The cost of microwave generation is lower, the existence of smoke pollution is eliminated, the burnt smell and toxic gas generated by the smoke pollution can be avoided, and the taste and safety of the smoke are improved.

In some embodiments, a shielding assembly 200 is disposed on the housing 110 and covers the nebulization chamber 121, the shielding assembly 200 being electrically connected to the metal layer 120 for shielding microwaves and transmitting aerosols. Specifically, the shielding assembly 200 may include a connector 210 and a wire mesh 220, the wire mesh 220 being disposed on the connector 210, the wire mesh 220 being in a detachable connection with the connector 210. The connection member 210 may be made of a metal material, and the connection member 210 may be detachably connected to the housing 110, for example, an internal thread is provided in the mounting hole 111 of the housing 110, an external thread is provided on the connection member 210, and when the internal thread and the external thread are engaged with each other, a threaded connection relationship between the connection member 210 and the housing 110 may be achieved. Of course, the connector 210 and the housing 110 may also form a snap-fit connection. An air guide 211 hole is formed in the connecting piece 210, the air guide 211 hole extends along the vertical direction, and smoke can pass through the air guide 211 hole.

The metal mesh 220 includes a first metal mesh 221 and a second metal mesh 222, and both the first metal mesh 221 and the second metal mesh 222 may be made of the same metal material, for example, both are made of stainless steel materials, however, the first metal mesh 221 and the second metal mesh 222 may be made of different metal materials according to actual needs. The first metal mesh 221 and the second metal mesh 222 are both electrically connected with the metal layer 120 and are provided with ventilation holes 223, the ventilation holes 223 are distributed on the first metal mesh 221 and the second metal mesh 222 in a set density, and the smoke can pass through the ventilation holes 223. The first metal mesh 221 and the second metal mesh cover the air guide 211 hole at the same time and are arranged at intervals along the extending direction of the air guide 211 hole, for example, the second metal mesh 222 is located above the first metal mesh 221, so that the second metal mesh 222 is further away from the atomizing chamber 121 than the first metal mesh 221, and the first metal mesh 221 covers the atomizing chamber 121.

Since the metal layer 120 is made of a metal material, the metal layer 120 has a shielding function to microwaves in the atomization cavity 121, so that the microwaves in the atomization cavity 121 are prevented from leaking out of the metal layer 120. Meanwhile, the first metal net 221 covers the atomization cavity 121 and is electrically connected with the metal layer 120, so that the first metal net 221 and the metal layer 120 form an omnibearing shielding effect on the atomization cavity 121 in a three-dimensional space, microwaves in the atomization cavity 121 are effectively prevented from leaking out of the shell 110 through the metal layer 120 and the first metal net 221, the microwaves leaking out of the shell 110 are prevented from being radiated to a human body to damage health, and the use safety of the microwave atomizer 20 and the electronic atomization device 10 is improved. In addition, the second metal mesh 222 covers the air guide 211 hole and is electrically connected with the metal layer 120, so that the second metal mesh 222 forms another reinforced protection line for preventing microwave leakage, and further preventing microwave leakage.

The international standard requires a microwave leakage of less than 5 milliwatts per square centimeter, and the maximum leakage is only 0.32 milliwatts per square centimeter, which is less than 15.6 times the international standard when tested on the microwave atomizer 20 of the above-described embodiment.

The cigarette holder 320 is arranged on the connecting piece 210 and is positioned above the second metal net 222, and the cigarette holder 320 has a certain filtering function on smoke, namely, the cigarette holder 320 plays a role of a filter tip, and can filter harmful atomization of the smoke, so that the safety of the smoke is further ensured. When the tobacco product 40 is atomized to generate smoke, the smoke sequentially passes through the ventilation holes 223 of the first metal mesh 221, the air guide 211 holes and the ventilation holes 223 of the second metal mesh 222 from the atomization cavity 121 to enter the cigarette holder 320, so that a user sucks the smoke in the cigarette holder 320. The mouthpiece 320 may be in a removable connection with the connector 210, for example, both may be threaded or snap-fit, which may allow for quick installation and removal of the mouthpiece 320 from the connector 210. Of course, the mouthpiece 320 and the connector 210 may also be in a non-detachable integral connection.

When the tobacco product 40 is loaded into the atomization chamber 121, the shielding assembly 200 is mounted on the housing 110, and the mouthpiece 320 is mounted on the connector 210, so that a user can smoke the smoke generated by the atomization of the tobacco product 40 through the mouthpiece 320. When the smoking of the tobacco product 40 in the aerosolization chamber 121 is completed, the entire shielding assembly 200 may be unloaded from the housing 110 and the aerosolization chamber 121 may then be reloaded with tobacco for a second puff.

In some embodiments, the number of transmission channels 124 is not limited, for example, the number of transmission channels 124 may be two, and the two transmission channels 124 are respectively denoted as a first transmission channel 125 and a second transmission channel 126. The metal layer 120 has an inner peripheral surface 122 defining the boundary of the atomizing chamber 121 and an inner bottom wall 123, the inner bottom wall 123 being connected to an end of the inner peripheral surface 122 remote from the shield assembly 200. Both the first transfer passage 125 and the second transfer passage 126 have through-holes on the inner peripheral surface 122, the through-holes of the first transfer passage 125 being denoted as first through-holes 125a, and the through-holes of the second transfer passage 126 being denoted as second through-holes 126a. The first through-hole 125a and the second through-hole 126a are disposed at intervals of a set angle in the circumferential direction of the atomizing chamber 121, and the set angle may have a value ranging from 90 ° to 180 °, for example, the specific value of the set angle may be 90 °, 100 °, 145 ° or 180 °. In a popular manner, in the case where the first through-hole 125a is located at the leftmost end of the atomizing chamber 121, the second through-hole 126a is located at the foremost end or rearmost end of the atomizing chamber 121 when the set angle is 90 °. When the set angle is 180 ° as shown in fig. 1, the second through-hole 126a is located at the rightmost end of the atomizing chamber 121, and at this time, a line connecting centers of the first through-hole 125a and the second through-hole 126a may intersect with the central axis of the atomizing chamber 121.

By setting the first through-hole 125a and the second through-hole 126a at a set angle in the circumferential direction of the atomizing cavity 121, microwaves from the first transmission channel 125 and the second transmission channel can cover the whole tobacco product 40 in the circumferential direction basically, so that microwave energy emitted into the atomizing cavity 121 is ensured to uniformly cover the tobacco product 40 in the circumferential direction as shown in fig. 4, partial areas of the tobacco product 40 are prevented from being higher in temperature due to larger microwave covering energy, the burning phenomenon of the tobacco product 40 due to local high temperature is avoided, and finally the influence of burnt smell and toxic gas on smoke taste and human health is eliminated.

The number of the transmission channels 124 may be three, that is, a third transmission channel 127 is added on the basis of the first transmission channel 125 and the second transmission channel 126, and the third transmission channel 127 penetrates through the inner bottom wall 123 to be communicated with the atomization cavity 121. Since the microwaves from the first and second transmission channels 125 and 126 can cover the sides of the tobacco product 40, and the microwaves from the third transmission channel 127 can cover the bottom of the tobacco product 40, the uniformity of the coverage of the microwaves in the atomizing chamber 121 on the tobacco product 40 is further improved. Of course, the number of the transmission channels 124 may be more than three according to the actual situation.

In some embodiments, the number of microwave generating units 310 may be equal to the number of transmission channels 124, at which time, different microwave generating units 310 emit microwaves into the atomizing chamber 121 through different transmission channels 124, and in short, the microwave generating units 310 form a "one-to-one" matching relationship with the transmission channels 124. The number of the microwave generating units 310 may be smaller than the number of the transmission channels 124, and at this time, the same microwave generating unit 310 can emit microwaves into the atomizing chamber 121 through at least two transmission channels 124 at the same time, and in short, the microwave generating unit 310 and the transmission channels 124 may form a "one-to-many" matching relationship. When the number of the microwave generating units 310 is increased, the microwave energy supplied to the atomizing chamber 121 in a unit time is larger, so that the amount of smoke generated by atomizing the tobacco product 40 in a unit time is larger, and thus, the requirement of a user for a large amount of smoke can be satisfied.

The microwave atomizer 20 may further include three different step-up and step-down circuits to meet the power supply requirements of the respective microwave generating units 310.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (12)

1. A tobacco product capable of generating an aerosol under microwave conditions, the tobacco product comprising tobacco, an aerosol former and functional particles, the functional particles being capable of absorbing microwaves and of converting the absorbed microwaves into thermal energy for transfer to the tobacco and the aerosol former, the functional particles being further capable of reflecting microwaves such that the aerosol former in the tobacco product is heated by the absorption of microwaves;

the functional particles are silicon carbide particles with porous structures;

the mass percentage of the propylene glycol in the aerosol forming agent is 5% -15%;

in the tobacco product, the tobacco accounts for 60-70 parts by mass, the aerosol forming agent accounts for 10-25 parts by mass, and the functional particles account for 15-25 parts by mass.

2. The tobacco product of claim 1, wherein the tobacco comprises a base tobacco selected from at least one of cut filler and tobacco sheet.

3. A smoking article according to claim 2, wherein said base tobacco is a blend of cut filler and tobacco sheet.

4. A smoking article according to claim 3, wherein said tobacco further comprises at least one of a flavoring and an inorganic filler.

5. A smoking article according to claim 3, wherein said aerosol former further comprises a non-tobacco flavoring selected from at least one of an alcohol flavoring and an aldehyde flavoring.

6. A smoking article according to any one of claims 1-5, wherein said functional particles have a particle size of not more than 100 μm.

7. A smoking article according to claim 5, wherein said functional particles have a particle size of 2.5 μm to 100 μm.

8. A smoking article according to claim 7, wherein said functional particles have a particle size of 10 μm to 60 μm.

9. A smoking article according to claim 6, wherein said smoking article is in the form of a sheet, sphere or ellipsoid.

10. A smoking article according to any one of claims 1 to 5 and 7 to 9, wherein said aerosol former further comprises a nicotinic compound selected from at least one of nicotine and a nicotine salt.

11. A smoking article according to claim 10, wherein said aerosol former comprises from 0.1% to 33% by mass of said nicotine compound.

12. A method of making a tobacco product comprising the steps of:

mixing tobacco, an aerosol-forming agent and functional particles, and preparing a tobacco product, wherein the functional particles are used for absorbing microwaves, converting the absorbed microwaves into heat energy and then transmitting the heat energy to the tobacco and the aerosol-forming agent, and the functional particles can reflect the microwaves so that the aerosol-forming agent in the tobacco product is heated due to the absorption of the microwaves;

the functional particles are silicon carbide particles with porous structures;

the mass percentage of the propylene glycol in the aerosol forming agent is 5% -15%;

in the tobacco product, the tobacco accounts for 60-70 parts by mass, the aerosol forming agent accounts for 10-25 parts by mass, and the functional particles account for 15-25 parts by mass.