阅读说明：本技术 一种基于燃料燃烧的烟制品加热装置 (Tobacco product heating device based on fuel combustion ) 是由 洪俊杰 羊光耀 盛华权 王世轩 范爱武 刘磊 石秋香 于 2021-08-11 设计创作，主要内容包括：本发明提供一种基于燃料燃烧的烟制品加热装置。该基于燃料燃烧的烟制品加热装置包括燃烧室、加热套筒、多孔介质和引射器；加热套筒通过套筒凸台安装于燃烧室内部,引射器通过引射器凸台安装于燃烧室内部下端,多孔介质安装于燃烧室内部,并位于加热套筒和引射器之间；外部燃料通过引射器接口于多孔介质内燃烧,加热燃烧室内的空气,从而使加热筒温度上升加热加热套筒内烟制品；加热套筒包括置于烟制品内部的加热件和加热套筒外壁。通过燃料燃烧加热加热套筒,使加热件和加热套筒外壁同步升温,实现对烟制品外侧向中心、中心向外侧,两个方向的加热,提高加热速度,避免烟制品加热不均、加热不充分的问题。(The present invention provides a smoking article heating apparatus based on fuel combustion. The fuel combustion-based smoking article heating apparatus includes a combustion chamber, a heating sleeve, a porous medium, and an injector; the heating sleeve is arranged in the combustion chamber through a sleeve boss, the ejector is arranged at the lower end in the combustion chamber through an ejector boss, and the porous medium is arranged in the combustion chamber and positioned between the heating sleeve and the ejector; external fuel is combusted in the porous medium through the connector of the ejector to heat air in the combustion chamber, so that the temperature of the heating cylinder is increased to heat the smoking articles in the heating cylinder; the heating sleeve includes a heating element disposed within the smoking article and a heating sleeve outer wall. Through fuel burning heating sleeve, make heating member and heating sleeve outer wall heat up in step, realize to the tobacco products outside to center, the center outside, the heating of two directions improves rate of heating, avoids the tobacco products heating uneven, the insufficient problem of heating.)

1. A fuel combustion based smoking article heating apparatus comprising a combustion chamber (200), a heating sleeve (300), a porous medium (400) and an injector (500); the heating sleeve (300) is installed inside the combustion chamber (200) through a sleeve boss (302), the ejector (500) is installed at the lower end inside the combustion chamber (200) through an ejector boss (502), and the porous medium (400) is installed inside the combustion chamber (200) and located between the heating sleeve (300) and the ejector (500); external fuel is combusted within the porous medium (400) through the injector port (503) to heat the air within the combustion chamber (200), thereby causing the heating sleeve (300) to increase in temperature to heat the smoking article within the heating sleeve (300).

2. A fuel combustion based smoking article heating apparatus in accordance with claim 1, wherein the combustion chamber (200) has an exhaust outlet (201) in a side wall thereof for discharging combustion exhaust gases.

3. A fuel combustion based smoking article heating apparatus according to claim 1, wherein the heating sleeve (300) is provided with a plurality of sectors (304) around its periphery.

4. A fuel combustion based smoking article heating apparatus in accordance with claim 1, wherein the fan (304) comprises a first fan (3041) and a second fan (3042) provided with a boss.

5. A fuel combustion based smoking article heating device according to claim 1, wherein the heating sleeve (300) is internally provided with a heating element (301) for insertion into the interior of a smoking article.

6. A fuel combustion based smoking article heating apparatus according to claim 1, wherein the porous medium (400) is coated with a catalyst.

7. A fuel combustion based smoking article heating apparatus according to claim 1, wherein the injector (500) is provided with a first air passage (501).

8. A fuel combustion based smoking article heating apparatus according to claim 1, wherein the combustion chamber (200) includes a combustion chamber interface (210) connected at a lower end to the injector (500).

9. A fuel combustion based smoking article heating apparatus according to claim 8, wherein said combustion chamber boss (210) is provided with a second air passage (2101).

10. A fuel combustion based smoking article heating apparatus in accordance with claim 8, wherein said combustion chamber boss (210) is formed with a firing aperture (2102) for attachment of an igniter.

Technical Field

The invention relates to the technical field of cigarette filter stick production and processing, in particular to a tobacco product heating device based on fuel combustion.

Background

Heating non-combustible smoking articles generally fall into two broad categories, one is to heat the tobacco liquid by using a heat source to generate nicotine, and the other is to bake tobacco shreds by using heat to release nicotine; both types of heat not burn smoking articles are intended to provide low tar nicotine cigarettes to smokers, thereby minimizing the harm to the smoker and people in the vicinity. The non-combustible heating tobacco products are generally heated by adopting an electric heating mode, and the problems of low temperature starting speed of a heating element, long heating time, long charging time, difficulty in continuous smoking and the like exist in the electric heating mode, so that the non-combustible heating tobacco products heated by fuel combustion are produced in the market at present.

Publication CN112335936A discloses a heating device for low-temperature cigarettes, comprising: the device comprises a shell, a cylinder body and a clamping piece, wherein the cylinder body is provided with openings at two ends in the shell; a fuel storage unit provided inside the cylinder; a tobacco containing portion provided on a side wall of the housing; the first end part of the heating part is inserted in the tobacco containing part, the second end part of the heating part is arranged at a distance from the fuel outlet end of the fuel storage part, and the heating part is used for absorbing heat released by fuel combustion and heating the low-temperature cigarette; and an exhaust gas cooling section including: a heat storage portion provided in the interlayer; and the tail end of the air outlet pipe penetrates through the heat storage part to be connected with the air outlet, the air outlet is arranged on the side wall of the shell, the starting end of the air outlet pipe is communicated with the inside of the barrel, and the cooled tail gas is discharged through the air outlet. The heating device for the low-temperature cigarette heats the heating part arranged in the cigarette product through the heat generated by burning the fuel so as to achieve the purpose of heating the cigarette product.

In the prior art, the heating of the non-combustible smoking product is realized by directly or indirectly contacting the single heat source arranged in the smoking product with the smoking product, and the single heating mode arranged in the smoking product has the conditions of uneven heating, insufficient heating of the smoking product or excessive heating of part of the smoking product.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a smoking article heating device based on fuel combustion, which heats a smoking article placed inside a heating cylinder by using heat generated by fuel combustion, thereby achieving the purpose of heating the smoking article.

The invention provides a smoking article heating device based on fuel combustion, which comprises a combustion chamber, a heating sleeve, a porous medium and an ejector, wherein the combustion chamber is provided with a combustion chamber; the heating sleeve is arranged in the combustion chamber through a sleeve boss, the ejector is arranged at the lower end in the combustion chamber through an ejector boss, and the porous medium is arranged in the combustion chamber and is positioned between the heating sleeve and the ejector; external fuel is combusted in the porous medium through the injector port to heat air in the combustion chamber, thereby raising the temperature of the heating cartridge to heat the smoking article in the heating cartridge.

The invention has the following excellent technical scheme: the side wall of the combustion chamber is provided with an exhaust gas outlet for discharging combustion exhaust gas.

The invention has the following excellent technical scheme: the periphery of the heating sleeve is provided with a plurality of fan blades.

The invention has the following excellent technical scheme: the fan blade comprises a first fan blade and a second fan blade, wherein the first fan blade and the second fan blade are provided with bosses.

The invention has the following excellent technical scheme: the heating sleeve is internally provided with a heating element for insertion inside a smoking article in which the fuel is burnt.

The invention has the following excellent technical scheme: the porous media is coated with a catalyst.

The invention has the following excellent technical scheme: the ejector is provided with a first air passage.

The invention has the following excellent technical scheme: the combustion chamber comprises an ejector interface of which the lower end is connected with the ejector.

The invention has the following excellent technical scheme: and a second air channel is formed on the combustion chamber interface.

The invention has the following excellent technical scheme: and an ignition hole for connecting an igniter is formed in the combustion chamber interface.

The invention discloses a tobacco product heating device based on fuel combustion, which has the following beneficial effects:

1. according to the scheme provided by the invention, a tobacco product is placed in a heating cylinder provided with a heating element, high-temperature gas is generated in a combustion chamber through fuel combustion, and the heating sleeve outer wall in the combustion chamber and the heating element placed in the tobacco product are heated; realize outside to center, the outside of center, heat smoking article in step from two directions, increase smoking article rate of heating, avoid smoking article heating uneven, the insufficient problem of heating.

2. According to the scheme provided by the invention, the fan blades are arranged on the periphery of the heating cylinder, so that the contact area of the heating cylinder and high-temperature gas is increased, and the heat transfer efficiency is improved.

3. According to the scheme provided by the invention, the fuel is combusted in the porous medium coated with the catalyst, the combustion temperature is reduced by using the catalyst, the fuel is fully combusted, and the generation of environmental pollutants is reduced.

4. According to the scheme provided by the invention, the first air channel and the second air channel are arranged, so that the fuel and the air are fully mixed, and the fuel is fully combusted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Figure 1 is a block diagram of a fuel combustion based smoking article heating apparatus according to an embodiment of the present invention.

Figure 2 is a top view of a heating sleeve of a fuel combustion based smoking article heating apparatus according to an embodiment of the present invention.

Figure 3 is a cross-sectional view of a heating sleeve of a fuel combustion based smoking article heating apparatus according to an embodiment of the present invention.

Figure 4 is a graph comparing the heat exchange efficiency of a fuel combustion based smoking article heating apparatus according to embodiments of the present invention over time.

In the figure: 100. a cover plate; 101. a sleeve interface; 200. a combustion chamber; 201. an exhaust gas outlet; 202. a first card slot; 210. a combustion chamber boss; 2101. a second air passage; 2102. an ignition hole; 2103. a second card slot; 300. heating the sleeve; 301. a heating member; 302. a sleeve boss; 303. a smoke chamber; 304. a fan blade; 3041. a first fan blade; 3042. a second fan blade; 400. a porous medium; 500. an ejector; 501. a first air passage; 502. an ejector boss; 503. and an ejector interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Please refer to fig. 1. The embodiment of the invention relates to a fuel combustion-based smoking article heating device, which comprises a heating sleeve 300 arranged in a combustion chamber 200, an ejector 500 clamped with a boss 210 of the combustion chamber, and a porous medium 400 arranged in the combustion chamber 200 and positioned between the heating sleeve 300 and the ejector 500; fuel enters the injector 500 from the injector port 503 and is ignited at the combustion chamber boss 210, and combusts within the porous media 400, generating heat that warms the heating sleeve 300 located within the combustion chamber 200, thereby heating the smoking article disposed within the heating sleeve 300.

Openings are arranged at two ends of the combustion chamber 200, the periphery of the combustion chamber is closed, one end of the combustion chamber extends outwards to form a combustion chamber boss 210 which is communicated with the combustion chamber 200, is hollow and can be connected with the ejector 500, and the other end of the combustion chamber boss is connected with the cover plate 100; the cover plate 100 is externally fixed by a fixing member such as a bolt set after being fitted with the port of the combustion chamber 200, and the cover plate 100 is further provided with a sleeve interface 101 for positioning the heating sleeve 300 by matching with the sleeve boss 302.

The side wall of the end part of the combustion chamber 200 connected with the cover plate 100 is provided with an exhaust gas outlet 201 for discharging exhaust gas generated after the fuel is combusted; the inner wall of the combustion chamber 200 is provided with two first engaging grooves 202, which are symmetrically disposed, and the two first engaging grooves 202 are engaged with the first and second blades 3041 and 3042, which are disposed on the outer periphery of the heating sleeve 300 and have notches, to position the heating sleeve 300.

The combustion chamber boss 210 is used for connecting the injector 500, a second clamping groove 2103 used for supporting the injector 500 is arranged on the combustion chamber boss 210, a lighting hole 2102 is formed in the side wall of the combustion chamber boss 210 and used for being connected with an ignition device externally, and a plurality of second air channels 2101 are formed between the lighting hole 2102 and the combustion chamber 200 and on the side wall of the combustion chamber boss 210 to further suck air to help fuel to burn.

In this embodiment, the combustion chamber 200 is a square structure with an opening on one side, one end of the opening is connected to the cover plate 100, and a hole is formed on the side opposite to the opening, and the hole extends outward to form a tubular combustion chamber boss 210. A plurality of second air channels 2101 are distributed on the periphery of the end part of the combustion chamber boss 210 close to the combustion chamber 200, an ignition hole 2102 is arranged below the second air channels 2101, and a second clamping groove 2103 used for supporting the ejector 500 is arranged on the inner wall of the end part of the combustion chamber boss 210 far away from the combustion chamber 200. The combustion chamber 200 and the combustion chamber boss 210 may be square or circular, and the shape and material thereof should not be construed as limiting the present invention.

Please refer to fig. 2 and fig. 3. The heating sleeve 300 includes a smoke chamber 303 inside the heating sleeve 300, a heating member 301 inside the smoke chamber 303, a fan 304 integrally connected to the heating member 301, and a sleeve boss 302 provided outside one end of the heating sleeve 300. The sleeve boss 302 is arranged on the periphery of the heating sleeve 300 and is abutted against the sleeve interface 101 on the cover plate 100 to position the heating sleeve 300; be equipped with the terminal surface of sleeve boss 302, begin inside sunken smoke chamber 303 who forms and be used for placing tobacco products from the terminal surface, smoke chamber 303 is inside to be equipped with heating member 301 along smoke chamber 303 length direction to when adding tobacco products in the messenger to smoke chamber 303, inside tobacco products can be arranged in to heating member 301, when heating member 301 is heated and heaies up, can heat tobacco products from inside. The fan 304 is disposed on the outer circumference of the heating sleeve 300 and is integrally connected to the heating member 301. As the fuel burns causing the temperature within the combustion chamber 200 to rise, the fins 304 receive and transfer heat throughout the outer wall of the heating sleeve 300, causing the outer wall of the heating sleeve 300 to rise in temperature and thereby heat the smoking articles therein.

The fan 304 includes a first fan 3041 and a second fan 3042 symmetrically disposed on the periphery of the heating sleeve 300 and provided with bosses, the first fan 3041 and the second fan 3042 are matched with two first slots 202 symmetrically disposed on the inner wall of the combustion chamber 200 to limit the heating sleeve, and meanwhile, the sleeve boss 302 abuts against the sleeve interface 101, and the positions of the heating sleeve 300 in the combustion chamber 200 are fixed by the joint action of the two.

The first and second vanes 3041 and 3042 have different widths, and accordingly, the wall thicknesses of the two combustion chambers 200 in which the two first engaging grooves 202 are symmetrically disposed are different. In this embodiment, the width of the second fan 3042 is greater than the width of the first fan 3041, the thickness of the wall of the side of the second fan 3042 where the first locking groove 202 is arranged is greater than the thickness of the wall of the side of the first fan 3041 where the first locking groove 202 is arranged; an exhaust outlet 201 is formed on one side wall with a larger wall thickness. In this embodiment, the sidewall with the larger wall thickness and the waste gas outlet 201 is close to the external control system and the fuel tank, and the increased wall thickness can be used for heat preservation and insulation; similarly, the increased wall thickness keeps the exhaust outlet 201 away from the user, thereby preventing the user from being scalded by the high temperature exhaust.

In this embodiment, the fan 304 is a planar rectangular fan, and preferably, to increase the heat transfer rate, the fan 304 may have a wave shape. It should be noted that the shapes and sizes of the heating sleeve 300, the fan 304, the heating element 301 and the smoke chamber 303 are determined according to practical application and working conditions, and the shapes and materials thereof should not be construed as limiting the present invention.

Please refer to fig. 1 again. Porous media 400 coated with a catalyst are provided between the lower end of the inside of the combustion chamber 200, the heating sleeve 300, and the combustion chamber boss 210. The fuel enters the injector 500 through the injector interface 503 and is ignited inside the combustion chamber boss 210, and the fuel is combusted in the porous medium 400, so that the combustion temperature of the fuel is reduced under the action of the catalyst, and the generation of combustion pollutants is reduced.

The inside second draw-in groove 2103 that is equipped with of combustion chamber boss 210 is connected with ejector 500, and the tip periphery that ejector 500 is connected with combustion chamber boss 210 is equipped with ejector boss 502, through ejector boss 502 and the cooperation of second draw-in groove 2103 butt, makes ejector 500 install on combustion chamber boss 210. The ignition hole 2102 that sets up on the combustion chamber boss 210 is located second draw-in groove 2103 top, and its switch-on external point firearm, the port that external point firearm stretched into combustion chamber boss 210 can restrict the displacement of ejector 500 on combustion chamber boss 210 length direction and realize limiting displacement.

Referring to fig. 1 again, the specific working process is as follows: the fuel forms high-speed fluid through the ejector interface 503 and enters the ejector 500, the high-speed fuel passively sucks air from the first air channel 501 due to negative pressure, the fuel and the air are mixed and then ignited by an igniter externally connected with the ignition hole 2102, and the air entering from the second air channel 2101 continues to support combustion; the ignited fuel is combusted in the porous medium 400 coated with the catalyst, the heat generated by the combustion heats the heating sleeve 300 in the combustion chamber 200, the fan sheets 304 absorb the heat and transmit the heat to the outer wall of the heating sleeve 300 and the internal heating element 301 thereof, so that the smoking article in the smoke cavity 303 is heated by the heating element 301 from the inside and is heated by the outer wall of the heating sleeve 300 from the outside, the bidirectional heating of the smoking article from the inside to the outside and from the outside to the inside is realized, and the heating efficiency is improved; the combustion exhaust gas is discharged from the exhaust gas outlet 201.

Preferably, the combustion chamber 200 is made of a ceramic or metal material with high temperature resistance and poor thermal conductivity, and a heat insulation material is arranged outside the combustion chamber to prevent the combustion chamber 200 from being heated to cause damage to external equipment.

Preferably, the heating sleeve 300 is made of metal having good heat conductive properties.

Referring to fig. 3, a graph of the heat exchange efficiency of the fuel combustion-based smoking article heating apparatus of the present embodiment with specific parameters over time is shown.

In this embodiment, the combustion chamber 200 and the cover plate 100 are manufactured by 3D printing using an aluminum oxide material. The size of the inner cavity of the combustion chamber 200 is 19 × 12 × 21mm, the wall thickness in the length direction is 1mm, the wall thickness in the width direction is 2mm and 3mm respectively, and a first clamping groove 202 with the thickness of 0.8mm is formed in the middle of two inner side walls in the width direction to match and fix the heating sleeve 300. An exhaust vent with a height of 3mm was left above the side wall with a wall thickness of 3 mm. Six 2 x 2mm square second air passages 2101 are opened on the cylindrical wall of the combustion chamber boss 210 at the lower portion of the combustion chamber 200. The cover plate is 1mm thick, and its length and width are respectively matched with combustion chamber 200 below through triangular chamfer, and are fixed through the outside of bolt group.

The heating sleeve 300 is made of red copper by 3D printing. The cigarette used in the examples is a COO cartridge of the heated non-combustible type produced by cigarette in Hubei, or other known form, with a cut tobacco portion length of 15mm, suitably heated at a temperature of about 340 ℃. According to the size of tobacco shreds, the heating sleeve 300 is a cylindrical heating element 301 with an inner diameter of 8mm, a wall thickness of 0.8mm, a height of 15mm and a middle diameter of 2mm and a height of 13 mm. 8 plate-type fan blades 304 with the thickness of 0.8mm and the height of 10mm are arranged on the periphery of the outer wall of the sleeve. The first and second fan sheets 3041 and 3042 of the heating sleeve 300, which are fitted to two width side walls of the combustion chamber 200, are provided with bosses protruding 2-3mm, and a sleeve boss 302 having a width of 1mm is provided at a position 2mm away from the upper portion of the heating sleeve 300 to fix the heating sleeve 300. Referring to fig. 2 and 3, a cross-sectional view and a top view of the heating sleeve 300 are shown.

The porous medium 400 uses a wire mesh of 80 mesh with a porosity of 0.82, and is coated with a Pt catalyst on the surface. The porous medium has an overall size of 19 × 12 × 5mm and is disposed in the lower portion of the combustion chamber 200. The fuel is liquid n-butane fuel, and after the fuel is partially premixed with air through the ejector 500, the fuel is stably combusted in the porous medium 400. The temperature of the gas generated by combustion is 450-600 ℃.

The ejector 500 is made of brass, the size of a main cylinder is phi 6 x 10mm, a phi 7 x 1mm ejector boss 502 is arranged at the upper part of the cylinder, and four first air channels 501 with the diameter of 2.4mm are formed around the ejector. The fuel forms high-speed jet entrainment air after passing through an ejector interface 503 with the inner diameter of 0.1mm of the ejector 500.

Three groups of control groups were additionally provided, control group 1: the cigarette is heated through the bottom of the heating sleeve 300 without the fan 304; control group 2: the cigarette is heated through the bottom of the heating sleeve 300 with the fan blades 304; control group 3: the cigarette is heated through the side walls of the non-fan 304.

The heating device of the smoking article and three control groups were calculated using a numerical simulation method, and the results are shown in fig. 4.

Figure 4 shows the overall heat exchange efficiency of the combustion gases of the present invention with a control to heat a cigarette after ignition has begun. It can be seen that the heat exchange efficiency of the present invention and the control group is reduced with the increase of the heating time. However, the combustion heating device with the fan blades 304 on the side wall surface is obviously superior to other combustion heating devices, and compared with the control group 1, the heat exchange efficiency at the initial moment is improved by more than 5 times, which shows that the invention obviously improves the utilization rate of fuel, and simultaneously, the temperature of waste gas after heat exchange is also reduced, thereby avoiding the injury to a user holding the combustion heating device.

The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It should be noted that, in the description of the present application, it should be noted that the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the application is usually placed in when the product of the application is used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.