CN212590298U - Fuming device in folding air flue induction heating - Google Patents

Abstract

The utility model belongs to novel cigarette smoking set field, concretely relates to is at folding air flue induction heating's device of being fuming. The smoke generating device comprises: a cigarette leading-in pipe, an induction coil, a heating cup, a heating element and a magnetic conduction sealing body); wherein, a cigarette leading-in pipe sets up smoke generating device's upper end, it is hollow tube structure, and inside cavity is for mixing the gas chamber, the diameter of mixing the gas chamber is greater than the inside cavity diameter of heating cup, a cigarette leading-in pipe (1) inner wall with be provided with the space between the heating cup upper end, as the intake duct. The utility model discloses carry out the space that space axial length dwindled folding to original "heating member + cigarette" to reduce smoking set heating partial axial length. The utility model discloses heating element (6) set up in the air flue, and the air flue is folding form of coming and going, has both increased airflow channel's length, has reduced smoke generating device's axial length again.

Description

Fuming device in folding air flue induction heating

Technical Field

The utility model belongs to novel cigarette smoking set field, concretely relates to is at folding air flue induction heating's device of being fuming.

Background

With the improvement of health consciousness of people, the cigarette which is not combusted by heating is more and more favored by smokers because the cigarette has less harm compared with the traditional cigarette which is combusted by burning and sucking. At present, the heating mode for heating the cigarette without burning comprises the following steps: contact electrical heating, non-contact electrical heating, carbon heating, and the like.

The contact type electric heating means that a cigarette is heated in a direct contact manner to obtain smoke, various heating appliances in various forms such as a tube, a needle or a plate which are heated by electricity are directly contacted with the cigarette or tobacco shreds, and the cigarette or tobacco is directly contacted and baked at the temperature lower than the ignition point of the cigarette, so that the aroma components and smoke components of the tobacco are volatilized, and the smoking requirements of smokers on the tobacco are met.

The method for heating cigarettes or tobacco shreds has the following problems:

firstly, the tobacco shreds directly contacted with the cigarettes or the tobacco shreds can be fully baked, the tobacco shreds at the position slightly far away from the heating body can not be fully baked, and the baking effect has certain non-uniformity on the circumferential cross section of the cigarettes;

secondly, the heating device has small volume and low self heat capacity. The smoker has a certain waiting time for heating before smoking. Because the heating element is in direct contact with the tobacco shreds, in order to ensure the heating effect of the tobacco part far away from the heating element, the surface temperature of the heating element is generally increased by 10-20 ℃ compared with the optimal adaptive heating temperature so as to ensure the heating sufficiency. But at the same time, the problems are that: after the tobacco which is contacted with the heating element is heated for a plurality of times, the baked tobacco substances can be stuck on the heating element, and peculiar smell or heating difficulty is brought to the subsequent smoking of cigarettes.

The existing cigarette heated by charcoal is ignited by a charcoal stick attached to the front end of tobacco, and then the air flowing through the charcoal stick is rapidly heated. When the hot air continues to flow through the cut tobacco part of the cigarette branch end under the suction negative pressure of the smoker, the cut tobacco is baked and heated, so that the non-combustion heating of the cut tobacco part is realized. Therefore, the heating mode can obtain the tobacco fragrance and avoid the generation of a large amount of harmful substances such as tar, nicotine and the like caused by ignition. Although the cigarette heated by the charcoal has the characteristic of lower harm than the existing common cigarette, the front end of the cigarette is additionally provided with the charcoal rod, so that the difficulty of cigarette manufacture is increased, the production efficiency is influenced, and the defects that a consumer needs to ignite the charcoal rod for a long time, the ignition is difficult, the charcoal rod can have certain peculiar smell after being ignited or has poor ventilation along with the smoking environment, carbon monoxide is generated, and even unsafe risks are generated exist. Also, the charcoal rod is difficult to control after ignition, and there is also some roasting of the cut tobacco portion when not smoking. And the end of the carbon rod is also in direct contact with or relatively close to the cut tobacco, so that the following problems exist: the phenomenon that a small amount of residual tobacco shreds are directly baked or even critically baked is also generated at the tail end of the burning carbon rod.

The existing non-contact electric heating mode is to heat the air flowing through the surface of a smoking set by using input air to be electrically heated, and then introduce the air into a cigarette to be heated in a baking type omnibearing three-dimensional mode by adopting a mode of directly electrifying and heating an annular metal heating element, a flat-layer metal heating element or a combined flat-layer metal heating element.

However, the above-mentioned non-contact electric heating method has the following problems:

first, because of the relation of electricity, the adjacent surfaces of the heating element are insulated from each other and need enough space to prevent short circuit, so that the problem that only the air flowing through the surface layer of the heating element can be sufficiently heated exists;

secondly, the problem of inconvenient temperature measurement and control of the heating element is solved: because the temperature sensor can not be directly installed on the heating body with interval requirement, and on the air flow path, it is not only inconvenient to install and lead wires, but also has the problems of air flow, overlarge relative temperature difference between static and non-suction when sucking and not easily controlling.

The existing heating cigarette consists of two parts, namely a tobacco section and a filter stick, wherein most of the filter sticks consist of a support section close to the tobacco section, a cooling section in the middle and a lip end at the tail end, which is contacted with the lips of a consumer. When the heated cigarette is inserted into the existing smoking set for heating cigarettes, the tobacco section part of the cigarette is shorter, mostly only 10-15 mm and can not exceed 20mm at most, and most smoking sets need to insert the tobacco section and (or) the support section part of the filter stick into the cavity for heating the smoking set together. In addition, when a consumer uses a general smoking set which is not produced for a certain kind (or brand) of cigarettes, the phenomenon that the distance between the tail end of the heating element and the supporting section of the cigarette filter stick is less than 2mm and even the tail end of the heating element penetrates into the head of the supporting section of the filter stick can be directly caused. In the above case, once the cigarette is normally heated and smoked, the support section material may not withstand the high temperature of the heating body, and the heat shrinkage or the heat collapse may occur. This not only affects the smoking of the second half of the cigarette (the cigarette deforms or softens when the support section shrinks or collapses) but also directly affects the smoking taste of the cigarette.

In order to solve the above problems, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a smoke generating device at folding air flue induction heating, smoke generating device includes: the cigarette comprises a cigarette leading-in pipe 1, an induction coil 3, a heating cup 5, a heating element 6 and a magnetic conduction sealing body 7;

wherein, cigarette leading-in pipe 1 sets up smoke generating device's upper end, it is hollow tube structure, and inside cavity is for mixing gas chamber 1D, 1 upper end center of cigarette leading-in pipe is first inlet port 1B, lower tip center is second inlet port 1E, first inlet port 1B's outer loop is provided with a plurality of air guide groove 1C, air mixing chamber 1D's diameter is greater than first inlet port 1B's diameter, second inlet port 1E is the same and coaxial with first inlet port 1B diameter, 1 lower extreme of cigarette leading-in pipe has at least one intake duct 1A.

The first introduction hole 1B and the second introduction hole 1E are coaxial, have the same diameter and are slightly smaller than the nominal diameter of a cigarette so as to clamp the inserted cigarette and prevent the cigarette from being accidentally taken out of the lips during suction. The first introduction hole 1B and the second introduction hole 1E are preferably provided with chamfers facilitating insertion of cigarettes in the direction in which the cigarettes are inserted.

The second introduction hole 1E is a cigarette guide hole for assisting in guiding and fixing a cigarette filter portion.

The heating cup 5 is arranged below the cigarette leading-in pipe 1, the whole cigarette leading-in pipe is of a hollow cup-shaped structure, a cigarette accommodating cavity 8 is formed inside the cigarette leading-in pipe, and at least one air inlet hole 9 is formed in the bottom of the cup;

the magnetic conduction sealing body 7 surrounds the periphery of the heating cup 5, the whole heating cup is of a hollow cup-shaped structure, the cup bottom is relatively sealed (only two wiring pins of the temperature measuring element 12 need to penetrate out from the lower part of the magnetic conduction sealing body 7), and an airflow channel is arranged between the inner wall of the magnetic conduction sealing body 7 and the outer wall of the heating cup 5;

the heating element 6 is arranged in the airflow channel, and the heating element 6 is made of ferromagnetic metal and has a structure capable of passing through air;

for example, the heating element 6 is a ferromagnetic wire bundle, a ferromagnetic wire mesh bundle, or a ferromagnetic porous metal, and has/forms numerous dense airflow paths inside and/or on the surface;

the induction coil 3 is arranged at the periphery of the magnetic conductive sealing body 7 and is connected with a power supply;

the air guide groove 1C, the air mixing cavity 1D, the air inlet channel 1A, the airflow channel, the air inlet hole 9 and the cigarette accommodating cavity 8 are communicated with each other through airflow.

The heating element 6 has/forms a plurality of dense airflow passages inside and/or on the surface thereof in airflow communication with the airflow channels.

The magnetic conduction sealing body 7 is made of materials which can be penetrated by magnetic fields and are high-temperature resistant, such as microcrystalline glass or ceramic.

The working principle of the air mixing cavity 1D is as follows: when a cigarette to be sucked is inserted, the tobacco section of the cigarette is inserted into the cigarette accommodating cavity 8, and the cigarette filter stick is inserted into the cigarette leading-in pipe 1. Outside air enters the air mixing chamber 1D from the air guide groove 1C, and normal-temperature air surrounding the cigarette filter stick in the air mixing chamber separates the cigarette inlet pipe 1 which is heated by conduction and radiation and has a relatively high temperature from the cigarette filter stick, so that the existing cigarette inlet pipe 1 which is in large-area contact with the cigarette filter stick is changed into contact with only the local hole wall of the first inlet hole 1B and the inner hole wall of the short cylinder of the second inlet hole 1E. The axial length of the walls of the two holes is shorter, so that the contact area between the two holes and the cigarette filter stick is smaller.

Preferably, the upper end of the second leading-in hole 1E is also provided with an orifice chamfer, which is not only convenient for leading in the cigarette, but also can further reduce the contact area with the cigarette filter stick. The axial length of the contact part of the hole wall of the second leading-in hole 1E and the cigarette filter stick is preferably 0.3-0.8 mm, and the contact state of the second leading-in hole and the cigarette filter stick is basically in a line contact state. Therefore, even if affected by the heating part, the temperature of the cigarette leading-in pipe 1 is very high, the thermal shrinkage or the generation of peculiar smell of the material in the supporting section part on the cigarette filter stick is not easy to cause, and simultaneously, the relative high temperature of the cooling section on the cigarette filter stick inserted in the peripheral inner wall and the center of the mixed gas cavity 1D of the cigarette leading-in pipe 1 can properly preheat the sucked normal temperature air, thereby achieving the purposes of reducing the power supply part consumption of the smoking set and improving the heat efficiency.

The induction coil 3 applies medium and high frequency current with larger power when the smoking set works, and can carry out electromagnetic induction heating on the heating element 6 made of ferromagnetic materials.

Preferably, the induction coil 3 is arranged at the periphery of the magnetic conductive sealing body 7.

Preferably, the heating element 6 comprises ferromagnetic metal fiber tows, ferromagnetic metal fiber composite nets, or ferromagnetic porous, foamed metal blocks, etc.

Preferably, the smoking device further comprises: and the electromagnetic isolation ring 2 is of a hollow tubular structure and is arranged on the periphery of the induction coil 3. The induction coil 3 has a high temperature insulation layer.

Preferably, the smoking device further comprises:

the insulating and heat-insulating layer 7A wraps the periphery of the magnetic conductive sealing body 7;

and the insulating high-temperature-resistant wrapping layer 7B wraps the periphery of the induction coil 3, and a gap is formed between the insulating high-temperature-resistant wrapping layer 7B and the inner wall of the electromagnetic isolating ring 2 so as to further insulate heat.

Herein, the high temperature resistance means: the material does not deform significantly at 300 ℃.

The insulating and heat-insulating layer 7A is made of high-temperature-resistant material, and is used for protecting the insulating layer on the surface layer of the induction coil 3 wound on the insulating and heat-insulating layer from being ablated by the high temperature of the magnetic conductive sealing body 7. Thus, when the induction coil 3 passes a medium-to-high frequency current, the high-frequency changing magnetic field acting inside the heating element 6 can generate a large number of small-range induced eddy currents inside the heating element 6 made of a ferromagnetic material, thereby rapidly heating the heating element 6.

The insulating high-temperature-resistant wrapping layer 7B is formed by adding a high-temperature-resistant protective film wrapping layer for protecting the induction coil 3 and assisting in fixing the induction coil 3 on the outer layer of the induction coil 3 and is used for protecting the induction coil 3 and fixing the induction coil 3 on the outer side of the magnetic conduction sealing body 7.

The electromagnetic isolation ring 2 is made of a non-ferromagnetic material made of metals such as copper or aluminum alloy, the inner wall of the electromagnetic isolation ring 2 is 0.1-1 mm or more away from the insulating high-temperature-resistant wrapping layer 7B wrapped outside the induction coil 3, so that on one hand, heat transfer from the whole smoke generating device to the outside in the radial direction is reduced as much as possible, on the other hand, electromagnetic signals are prevented from radiating to the outside in the radial direction of the smoke generating device, a relatively good external electromagnetic environment is guaranteed to be arranged on the periphery of the smoke generating device, and electromagnetic power is reduced from being transmitted in a useless direction.

Preferably, the smoking device further comprises: a first temperature measuring element 4 and a second temperature measuring element 12; the first temperature measuring element 4 is embedded in the heating element 6, and the second temperature measuring element 12 is arranged in a uniform heat cavity 11 formed between the bottom of the heating cup 5 and the bottom of the magnetic conductive sealing body 7 and is opposite to the air inlet 9.

The working processes of the first temperature measuring element 4 and the second temperature measuring element 12 are as follows: the control circuit is attached to the smoke generating device. The temperature of the heating element 6 is measured by the first temperature measuring element 4, and the temperature of the heating element 6 is sent to the control circuit so as to timely control the electrical parameters loaded to the induction coil 3.

When the gas sucked from the gas mixing cavity 1D passes through the pores of the heating element 6, the heating element 6 exchanges heat between the heat on the heating element and the gas entering the heating element, the heat and the gas are sucked into the heat equalizing cavity 11 to be uniformly mixed, and the gas is sucked into a cigarette from the air inlet hole 9 at the bottom of the heating cup 5 at the center and provided with the second temperature measuring element 12 to heat and bake the tobacco part of the cigarette. At this time, the second temperature measuring element 12 measures the air temperature in the soaking cavity 11 again, and sends information to the control circuit, so as to realize feedback control of parameters such as heating power, heating rate and the like of the heating element 6.

Preferably, the smoking device further comprises: a heat insulation pipe 10, a heat insulation base 13, and a base 14; the heat insulation pipe 10 is arranged on the periphery of the electromagnetic isolation ring 2 and clamped between the cigarette leading-in pipe 1 and the base 14;

the electromagnetic isolation ring 2 is clamped between the cigarette leading-in pipe 1 and the heat insulation seat 13;

the heat insulation seat 13 is arranged below the magnetic conductive sealing body 7, and the base 14 is arranged below the heat insulation seat 13.

The heat insulation pipe 10 is a vacuum double-layer heat insulation pipe. The heat insulation seat 13 is made of heat-resistant silica gel. The base 14 is made of high-temperature-resistant PEEK plastic and the like.

The induction coil 3 is connected to a power supply through a connecting wire 15, and the connecting wire 15 penetrates out of the heat insulation seat 13 and the base 14.

Preferably, be provided with the electromagnetism isolation layer in the smoke generating device, the electromagnetism isolation layer includes: the electromagnetic isolation layer is attached to the interior of the air mixing cavity 1D and is attached to the upper part or the lower part of the heat insulation seat 13. More specifically, when electromagnetic isolation needs to be performed to the maximum extent at two axial ends of the smoke generating device, a layer of aluminum foil with the thickness of about 0.01-0.1 mm can be attached to the peripheral inner wall and the upper and lower inner walls of the air mixing cavity 1D at the upper part in the axial direction; the lower end of the cigarette leading-in pipe 1 is provided with an inner boss (the second leading-in hole 1E is formed inside the inner boss) which extends radially inwards, and the lower end face of the inner boss needs to be pasted with an aluminum foil with the thickness of 0.01-0.1 mm. Similarly, the lower part of the smoke generating device in the axial direction can be bonded with an aluminum gasket with the thickness of 0.01-0.1 mm on the upper part or the lower part of the heat insulation seat 13, and the electromagnetic interference can be prevented from being generated on the lower part in the axial direction. Of course, holes of suitable size are left in the said aluminium gasket and in the insulating seat 13 and in the two connecting leads 15 where the legs are drawn, in order to prevent short circuits. The surface of the layer of aluminum gasket facing the cigarette accommodating cavity 8 is preferably coated with a silver layer or polished to be high-gloss, so that the heat radiated from the soaking cavity 11 can be reflected back, and the heat preservation in the smoking device is facilitated.

Preferably, the air inlet holes 9 are distributed at the bottom of the heating cup 5 in an annular shape.

Preferably, the diameters of the first introduction hole 1B and the second introduction hole 1E are slightly smaller than the nominal diameter of the cigarette to be smoked and smaller than or equal to the diameter of the cigarette accommodating cavity 8.

Preferably, the lower end of the cigarette leading-in pipe 1 is provided with an inner boss extending radially inwards, the lower end of the cigarette leading-in pipe is provided with a lower boss extending axially downwards, and the at least one air inlet channel 1A is annularly distributed on the lower boss and penetrates through the lower boss;

the upper end part of the heating cup 5 is abutted against the lower surface of the inner boss and is positioned on the inner side of the lower boss; the upper end part of the magnetic conduction sealing body 7 is positioned on the outer side of the lower boss.

The technical scheme can be freely combined on the premise of no contradiction.

The utility model discloses following beneficial effect has:

1. the utility model discloses designed a smoke generating device at folding air flue induction heating for the first time, the heating principle is induction heating, and inside and/or the surface of heat-generating body has/forms a plurality of air current passageways, can be to flowing through its surface and the quick sufficient heating of inside air, and the air heating cigarette that recycles this heating is propped up, and the problem that electric heating cigarette heating is inhomogeneous before effectively solving, charcoal heating cigarette easily bakes and fires, difficult accuse, fragrance composition is not enough, the suction is felt poor. Compare with current contact electrical heating, non-contact electrical heating, charcoal heating method, the utility model discloses a smoke generating device is more even to the toasting of tobacco, and is more abundant, and does not have tobacco material adhesion, the tobacco section after the toasting that contact electrical heating produced to be detained the smoking set scheduling problem.

2. The former simple tandem heating body plus cigarette scheme can make the axial length of the cigarette heating part longer, and the length of the smoke generating device also longer. For overcoming this shortcoming, performance induction heating's advantage, the utility model discloses carry out the space that space axial length reduces folding to original "heating member + cigarette" to reduce smoking set heating part's axial length. The utility model discloses heating element 6 sets up in the air flue, and the air flue is folding form of coming and going, has increased airflow channel's length promptly, has reduced smoke generating device's axial length again.

3. Most importantly, the utility model discloses the design such as the inside gas mixing chamber 1D of cigarette leading-in pipe 1 and the air guide groove 1C on it has following effect: the contact area with the cigarette filter stick is reduced so as to avoid the thermal shrinkage of the material in the support section part on the cigarette filter stick; the sucked air is preheated.

4. A uniform heating cavity 11 is formed between the bottom of the heating cup 5 and the bottom of the magnetic conductive sealing body 7 of the smoke generating device. The heat equalizing cavity 11 has the following functions: the user's suction is in produce the pressure differential in the even hot chamber 11, under the effect of pressure differential, the inside multizone that produces of even hot chamber 11 flows a little, and homogenization heat and pressure differential to inlet port 9, receive the negative pressure that the suction produced after, just obtain the gas that the uniform temperature descends simultaneously and inhale cigarette and hold the cigarette in the chamber 8 and insert cigarette in, the tobacco part with high-temperature gas after these homogenizes bakes the heating.

5. In the preferred technical scheme, inlet port 9 is the annular distribution and is in the bottom of heating cup 5, the air admission in the even hot chamber 11 when the cigarette holds chamber 8, the dispersion degree is higher, consequently more even to the heating effect of cigarette.

Drawings

Fig. 1 is a schematic longitudinal cross-sectional view of a smoking device inductively heated in a folded airway as described in example 1.

FIG. 2 is a schematic longitudinal cross-sectional view of the smoking device of example 1 after insertion into a cigarette.

Fig. 3 is a schematic longitudinal cross-sectional view of a smoking device inductively heated in a folded airway as in example 2.

List of reference numerals:

1. the cigarette leading-in pipe, 1A, the intake duct, 1B, first inlet hole, 1C, air guide groove, 1D, air mixing cavity, 1E, second inlet hole, 2, isolating ring, 3, induction coil, 4, first temperature measuring element, 5, heating cup, 6, heating element, 7, magnetic conduction sealing body, 7A, insulation heat-insulating layer, 7B, insulation high temperature resistant wrapping layer, 8, cigarette accommodating cavity, 9, air guide hole, 10, heat insulation cavity, 11, soaking cavity, 12, second temperature measuring element, 13, heat insulation seat, 14, base, 15 and connecting lead.

Detailed Description

The present invention will be further described with reference to the following detailed description.

Example 1

Referring to fig. 1, a folded airway device includes: the cigarette leading-in pipe comprises a cigarette leading-in pipe 1, an electromagnetic isolating ring 2, an induction coil 3, a first temperature measuring element 4, a heating cup 5, a heating element 6, a magnetic conduction sealing body 7, an insulating and heat-insulating layer 7A, an insulating and high-temperature-resistant wrapping layer 7B, a cigarette accommodating cavity 8, an air inlet 9, a heat insulating cavity 10, a heat equalizing cavity 11, a second temperature measuring element 12, a heat insulating seat 13, a base 14 and a connecting lead 15.

The cigarette leading-in pipe 1 is arranged at the upper end of the smoking device and is of a hollow pipe structure, an inner cavity is an air mixing cavity 1D, the center of the upper end part of the cigarette leading-in pipe 1 is a first leading-in hole 1B, the center of the lower end part of the cigarette leading-in pipe 1 is a second leading-in hole 1E, the outer ring of the first leading-in hole 1B is provided with a plurality of air guide grooves 1C, the diameter of the air mixing cavity 1D is larger than that of the first leading-in hole 1B, the diameter of the second leading-in hole 1E is the same as that of the first leading-in hole 1B and is coaxial with the first leading-in hole 1B, and the lower end;

the diameter of the first lead-in hole 1B is equal to that of the second lead-in hole 1E, and the diameters of the first lead-in hole 1B and the second lead-in hole 1E are slightly smaller than the diameter of the cigarette accommodating cavity 8 and slightly smaller than or equal to the outer diameter of the inserted cigarette;

the cigarette leading-in pipe 1 is externally designed into a plurality of step-shaped structures to fix the electromagnetic isolation ring 2, the heating cup 5, the magnetic conduction sealing body 7 and the heat insulation cavity 10 below the cigarette leading-in pipe through clamping. The specific design is as follows:

the lower part of the first guide hole 1B of the cigarette leading-in pipe 1 is provided with a three-stage step-shaped circular table which extends downwards along the axial direction of the first guide hole 1B and contracts radially, the outer diameter of the first-stage circular table is the largest, the inner part of the first-stage circular table contains a gas mixing cavity 1D, and the outer part of the first-stage circular table is connected with a heat insulation cavity 10 in an inscribed mode; the second stage truncated cone contracts inwards, can be externally connected with the electromagnetic isolation ring 2, ensures that a space which is larger than or equal to 0.3mm is reserved between the second stage truncated cone and the inner wall of the heat insulation cavity 10, and enables the lower end face to be abutted against or flush with the upper edge of the induction coil 3; the diameter of the third stage of round platform is further contracted, the outer circle of the third stage of round platform is directly connected with the inner wall of the magnetic conduction sealing body 7 in an inscribed mode, a plurality of air inlet channels 1A orifices communicated with the air mixing cavity 1D are distributed on the lower end face of the third stage of round platform and are abutted against the upper edge of the heating element 5, and the inner circle of the third stage of round platform is connected with the outer wall of the heating cup 5 in.

The heating cup 5 is arranged below the cigarette guide pipe 1, is of a hollow cup-shaped structure as a whole, is internally provided with a cigarette accommodating cavity 8, the diameter of the cigarette accommodating cavity 8 is slightly larger than or equal to that of the first guide hole 1B, and is slightly larger than or equal to the outer diameter of a cigarette inserted into the cigarette accommodating cavity, and the center of the cup bottom is provided with one or more air inlet holes 9;

the magnetic conduction sealing body 7 surrounds the periphery of the heating cup 5, is of a hollow cup-shaped structure as a whole, is sealed at the bottom of the cup, and is provided with an airflow channel between the inner wall of the magnetic conduction sealing body 7 and the outer wall of the heating cup 5.

The heating element 6 is arranged in an air flow channel between the magnetic conductive sealing body 7 and the heating cup 5. The heating element 6 is: the ferromagnetic metal fiber tows are distributed along the radial direction of the central line and are arranged in a circular ring shape, and a plurality of airflow channels are formed inside the ferromagnetic metal fiber tows.

The induction coil 3 is arranged at the periphery of the magnetic conductive sealing body 7 and is connected with a power supply, and the induction coil 3 can perform induction heating on the heating element 6 made of ferromagnetic materials.

In the sequential inflow order, the suction airstream passes sequentially through: the cigarette holder is characterized in that the air guide groove 1C, the air mixing cavity 1D, the air inlet channel 1A, the airflow channel, the air inlet hole 9 and the cigarette accommodating cavity 8 are arranged in the cigarette holder.

The material of the cigarette leading-in pipe 1 is selected as follows: a high temperature resistant PEEK composite material with relatively poor thermal conductivity. The material of the heating cup 5 is selected from: microcrystalline glass or ceramic. The magnetic conduction sealing body 7 is made of microcrystalline glass.

The electromagnetic isolation ring 2 is a hollow tubular structure and is arranged on the periphery of the induction coil 3. The electromagnetic isolation ring 2 is made of non-ferromagnetic materials of metals such as copper or aluminum alloy.

The insulating high-temperature-resistant wrapping layer 7B is a high-temperature-resistant and insulating protective film wrapping layer which is used for protecting the induction coil 3 and fixing the induction coil 3 on the outer side of the heating cup 5 and is formed by adding a high-temperature-resistant protective layer and assisting in fixing the induction coil 3 on the outer layer of the induction coil 3. The inner wall of the electromagnetic isolation ring 2 and the insulating high-temperature-resistant wrapping layer 7B wrapped outside the induction coil 3 are spaced by 0.1-1 mm or more, so that on one hand, heat transfer from the whole smoking device to the outside in the radial direction is reduced as much as possible, on the other hand, electromagnetism is prevented from being transferred to the outside in the radial direction of the smoking device, the periphery of the smoking set is ensured to have a relatively good external electromagnetic environment, and electromagnetic power is reduced from being transmitted in a useless direction.

The insulating and heat-insulating layer 7A wraps the periphery of the magnetic conductive sealing body 7 and is made of high-temperature-resistant material, so that the insulating layer on the surface layer of the induction coil 3 wound on the insulating layer is protected from being ablated due to the high temperature of the magnetic conductive sealing body 7. Thus, when the induction coil 3 passes a medium-to-high frequency current, the high-frequency changing magnetic field acting inside the heating element 6 can generate a large number of small-range induced eddy currents inside the heating element 6 made of a ferromagnetic material, thereby rapidly heating the heating element 6.

The first temperature measuring element 4 is arranged inside the heating element 6, and the second temperature measuring element 12 is arranged in a uniform heat cavity 11 formed between the bottom of the heating cup 5 and the bottom of the magnetic conductive sealing body 7 and is opposite to the air inlet 9 in the center. The smoke generating device is provided with a control circuit (not shown in the figures of the utility model) in an attached manner.

The control circuit works as follows:

the temperature of the heating element 6 is measured by the first temperature measuring element 4, and the temperature of the heating element 6 is sent to the control circuit, so as to timely control the electrical parameters loaded to the induction coil 3. Follow the gas that air mixing chamber 1D inhaleed is followed when the hole of heating element 6 is passed through, heating element 6 produces the heat exchange with the gas of entering with the heat on it, and the gas is inhaled heat chamber 11 that forms below heating cup 5 bottom and the magnetic conduction sealing 7 bottom is interior even mixture, and the temperature is more unanimous, and from central authorities, have the inlet port 9 department of heating cup 5 bottom of second temperature measurement component 12 inhales in the cigarette, heats the tobacco part of cigarette and toasts. At this time, the second temperature measuring element 12 measures the air temperature in the soaking cavity 11 again, and sends information to the control circuit, so as to realize feedback control of the heating power and rate parameters of the heating element 6.

The heat insulation pipe 10 is arranged at the periphery of the electromagnetic isolation ring 2 and clamped between the cigarette leading-in pipe 1 and the base 14; the electromagnetic isolation ring 2 is clamped between the cigarette leading-in pipe 1 and the heat insulation seat 13; the heat insulation seat 13 made of heat-resistant silica gel is arranged below the magnetic conduction sealing body 7, and the base 14 made of high-temperature-resistant PEEK plastic is arranged below the heat insulation seat 13.

The heat insulation pipe 10 is a vacuum double-layer heat insulation pipe. The heat insulation seat 13 and the base 14 are matched with the above parts to complete the axial positioning of the whole smoke generating device. The connecting leads 15 of the induction coil 3 also protrude from the insulating base 13 and the base 14.

When the electromagnetic isolation needs to be performed to the maximum extent at the two axial ends of the smoke generating device, a layer of aluminum foil (not shown in fig. 1) with the thickness of about 0.01-0.1 mm can be attached to the peripheral inner wall and the upper and lower inner walls of the air mixing cavity 1D at the upper part in the axial direction. Similarly, an aluminum gasket (not shown in fig. 1) with a thickness of about 0.01 to 0.1mm may be bonded to the upper portion or the lower portion of the heat insulation seat 13 at the lower portion of the smoke generating device in the axial direction, so as to prevent electromagnetic interference from occurring at the lower portion in the axial direction. Of course, a hole large enough to prevent short circuit is left in the place where the aluminum gasket and the heat insulation base 13 and the two connecting leads 15 are led out.

The schematic view of the smoking device of example 1 after insertion into a cigarette is shown in figure 2. The position of the cigarette portions, the suction air flow, and the direction of the air flow are shown in figure 2.

Wherein I is the tobacco section part of the cigarette, and the length of the tobacco section part is larger than the height of the heating cup 5 which can be inserted. The II is a filter stick part of the cigarette and consists of a filter stick supporting section III inserted into the air mixing cavity 1D, a smoke temperature reduction section IV exposed in the air and a lip end filtering section V.

Air entering from the outside enters the air mixing cavity 1D from the air guide groove 1C, and in the cavity, normal-temperature air surrounding the cigarette filter stick separates the cigarette inlet pipe 1 with high temperature, and the cigarette filter stick II only contacts with the local hole wall of the first inlet hole 1B and the local hole wall of the second inlet hole 1E. The hole wall of the second leading-in hole 1E which is indirectly heated is only in line contact with the tobacco section part of the cigarette, so that the thermal shrinkage deformation of the cigarette filter stick can be effectively prevented, because the cigarette filter stick is not directly contacted. Even if the cigarette is influenced by the heating part, the temperature of the cigarette leading-in pipe 1 after being sucked is higher, and the thermal shrinkage of the material in the supporting section III on the cigarette filter stick is not easy to cause. Meanwhile, the high temperature of the inner wall of the air mixing cavity 1D of the cigarette leading-in pipe 1 can also properly increase the temperature of sucked air, thereby achieving the purpose of improving the heat efficiency.

The flow path of air within the smoke generating device is as follows: external air follows first inlet hole 1B with air guide groove 1C enters into mix in the air mixing chamber 1D, and air in the air mixing chamber 1D preheats, then passes through inlet channel 1A gets into airflow channel is quilt in it heating element 6 heats, then gets into even heat chamber 11 in heat and pressure by the homogenization back, through inlet port 9 enters into in the cigarette holds the cigarette in the chamber 8, heats a cigarette tobacco section and produces aerosol, and with aerosol mixes and forms smog and is sucked out from a cigarette by the user together.

Example 2

The difference between this example and example 1 is: the bottom of the heating cup 5 is provided with a plurality of air inlet holes 9 distributed annularly, and the schematic longitudinal section of the smoke generating device is shown in fig. 3. The second temperature measuring element 12 is arranged in a uniform heat cavity 11 formed between the bottom of the heating cup 5 and the bottom of the magnetic conductive sealing body 7, and is over against or biased towards any air inlet 9 (shown by the rightmost air inlet 9 in the figure). At this moment, in the air flue, the air that is heated passes through a plurality of inlet ports 9 of annular distribution and follows even heat chamber 11 enters into in the cigarette holds chamber 8, the dispersion degree of air is higher, consequently more even to the heating effect of cigarette.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A smoking device for induction heating in a folded airway, the smoking device comprising: the cigarette guiding-in pipe (1), the induction coil (3), the heating cup (5), the heating element (6) and the magnetic conduction sealing body (7);

the cigarette guide pipe (1) is arranged at the upper end of the smoke generating device and is of a hollow pipe structure, an inner cavity is an air mixing cavity (1D), the center of the upper end of the cigarette guide pipe (1) is a first guide hole (1B), the center of the lower end of the cigarette guide pipe is a second guide hole (1E), the outer ring of the first guide hole (1B) is provided with a plurality of air guide grooves (1C), the diameter of the air mixing cavity (1D) is larger than that of the first guide hole (1B), the diameter of the second guide hole (1E) is the same as that of the first guide hole (1B) and the second guide hole is coaxial with the first guide hole (1B), and the lower end of the cigarette guide pipe (1) is provided with at least one air inlet channel (1A);

the heating cup (5) is arranged below the cigarette leading-in pipe (1), the whole cigarette leading-in pipe is of a hollow cup-shaped structure, a cigarette accommodating cavity (8) is formed inside the cigarette leading-in pipe, and at least one air inlet hole (9) is formed in the bottom of the cup;

the magnetic conduction sealing body (7) surrounds the periphery of the heating cup (5), the whole heating cup is of a hollow cup-shaped structure, the cup bottom is sealed relatively, and an airflow channel is arranged between the inner wall of the magnetic conduction sealing body (7) and the outer wall of the heating cup (5);

the heating element (6) is arranged in the airflow channel, and the heating element (6) is made of ferromagnetic metal and has a structure capable of passing through air;

the induction coil (3) is arranged on the periphery of the magnetic conductive sealing body (7) and is connected with a power supply;

the cigarette holder is characterized in that the air guide groove (1C), the air mixing cavity (1D), the air inlet channel (1A), the air flow channel, the air inlet hole (9) and the cigarette accommodating cavity (8) are communicated with each other through air flow.

2. A smoking device according to claim 1 wherein the heating element (6) comprises a ferromagnetic metal fiber tow, a ferromagnetic metal fiber composite web, or a ferromagnetic porous, foamed metal block.

3. A smoking device according to claim 1, further comprising: the electromagnetic isolation ring (2) is of a hollow tubular structure and is arranged on the periphery of the induction coil (3).

4. A smoking device according to claim 3, further comprising: an insulating and heat-insulating layer (7A) which is wrapped on the periphery of the magnetic conductive sealing body (7);

and the insulating high-temperature-resistant wrapping layer (7B) wraps the periphery of the induction coil (3), and a gap is formed between the insulating high-temperature-resistant wrapping layer (7B) and the inner wall of the electromagnetic isolating ring (2).

5. A smoking device according to claim 1, further comprising: a first temperature measuring element (4) and a second temperature measuring element (12); the first temperature measuring element (4) is embedded in the heating element (6), and the second temperature measuring element (12) is arranged in a heat equalizing cavity (11) formed between the bottom of the heating cup (5) and the bottom of the magnetic conductive sealing body (7) and is opposite to the air inlet (9).

6. A smoking device according to claim 3, further comprising: a heat insulation pipe (10), a heat insulation seat (13), and a base (14); the heat insulation pipe (10) is arranged on the periphery of the electromagnetic isolation ring (2) and clamped between the cigarette leading-in pipe (1) and the base (14);

the electromagnetic isolation ring (2) is clamped between the cigarette leading-in pipe (1) and the heat insulation seat (13);

the heat insulation seat (13) is arranged below the magnetic conduction sealing body (7), and the base (14) is arranged below the heat insulation seat (13).

7. A smoking device according to claim 1 wherein the air inlet holes (9) are annularly distributed in the base of the heating cup (5).

8. A smoking device according to claim 1, wherein the diameter of the first and second inlet holes (1B, 1E) is slightly smaller than the nominal diameter of the cigarettes and smaller than or equal to the diameter of the cigarette receiving chamber (8).

9. A smoking device according to claim 1, wherein the lower end of the cigarette inlet pipe (1) is provided with an inner boss protruding radially inwards, the lower end is provided with a lower boss protruding axially downwards, and the at least one air inlet channel (1A) is annularly distributed on the lower boss and penetrates through the lower boss;

the upper end part of the heating cup (5) is abutted against the lower surface of the inner boss and is positioned on the inner side of the lower boss; the upper end part of the magnetic conduction sealing body (7) is positioned on the outer side of the lower boss.

10. A smoking device according to claim 6, wherein an electromagnetically segregating layer is provided therein, the electromagnetically segregating layer comprising: the electromagnetic isolation layer is attached to the interior of the air mixing cavity (1D) and is attached to the upper part or the lower part of the heat insulation seat (13).

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