CN116636655A - Airflow heating cigarette mechanism and cigarette heating - Google Patents

Abstract

The invention discloses an airflow heating cigarette mechanism, which comprises a central heat source and a heat exchange space positioned around the central heat source, wherein airflow flows in from the lower part of the heat exchange space, and after passing through the heat exchange space, uniform-temperature airflow is formed, and the airflow flows out from the upper part of the heat exchange space and heats cigarettes. The invention also provides a cigarette heating mechanism which adopts the airflow heating cigarette mechanism provided by the invention. The invention effectively solves the problems of the stability and uniformity of the temperature of the hot air flow for heating the cigarettes through simple structure arrangement, has low cost and excellent effect, and has stronger practical application effect.

Description

Airflow heating cigarette mechanism and cigarette heating

technical field

The invention relates to the technical field of aerosol generating devices, and more specifically relates to a heating mechanism and an aerosol generating device.

Background technique

Heated cigarettes are currently a hot topic in domestic research. Heated cigarettes maintain the original flavor of tobacco and avoid other components produced by tobacco combustion. The goal is to eliminate most of the harmful substances produced by tobacco combustion while maintaining the smoking experience, thereby reducing the adverse effects of combustion on the human body.

The core of heating cigarette research is the research on heating mechanism. According to different heating methods, it generally includes contact heating and non-contact heating. Contact heating includes central heating and circumferential heating. The principle is that the heating element is in direct contact with the aroma-producing material section of the cigarette, and the aerosol is heated and baked by heat conduction. Its obvious disadvantage is that the excessive carbonization of the partial tobacco in the contact part is easy to cause burnt burns, and the part of the tobacco far away from the contact part cannot be fully heated due to the limited heat conduction capacity, and the overall carbonization rate of the cigarette is low, which affects the taste of smoking and causes waste of part of the tobacco . The non-contact heating can uniformly heat the whole cigarette, and the overall carbonization rate of the aroma-producing materials of the cigarette after use is better than that of the contact heating.

At present, the commonly used non-contact heating includes infrared heating, microwave heating, and hot air heating. Both infrared heating and microwave heating face significant problems such as high cost and complex structure of the heating mechanism, making it difficult to popularize and apply. The heating of the hot air flow is to heat the air flow through the heating mechanism, and use the heated hot air flow to heat the cigarettes, so that the cigarettes generate aerosol for the user to inhale.

When the hot air is heated, whether it is through internal heating or external peripheral heating, the temperature of the heated hot air is not uniform, so the carbonization rate of the cigarette will vary in different parts, which affects the stability of the smoke from puff to puff. .

Contents of the invention

The purpose of the present invention is to overcome the problem of uneven temperature in hot air heating in the prior art, and provide an airflow heating cigarette mechanism that can ensure uniform temperature of hot air at various parts, thereby improving the puff-by-puff stability of smoke.

The present invention is specifically realized like this:

An airflow heating cigarette mechanism, including a central heat source and a heat exchange space located around the center heat source. The airflow flows in from the bottom of the heat exchange space and forms a hot airflow with uniform temperature after passing through the heat exchange space. The hot airflow flows out from above the heat exchange space And the cigarette is heated.

A further solution is:

In order to ensure uniform temperature of the hot air flow, the heat exchange space is located at 1-2.5mm around the central heat source, and the heat exchange space is in the shape of a cylinder as a whole, and the central heat source is in the center of the cylinder. Among them, the heat exchange space is located at 1-2.5mm around the central heat source, which means that the space 1mm to 2.5mm outside the outer wall of the central heat source is the heat exchange space, that is to say, the distance between the outer side of the heat exchange space and the outer wall of the central heat source is 1mm to 2.5mm.

By limiting the size of the heat exchange space, the present invention ensures that the central heat source can quickly and stably heat the heat exchange space within this size range, and at the same time ensures that the internal temperature of the heat exchange space is relatively uniform, ensuring the final hot air flow uniform temperature.

A further solution is:

When the hot air flows out from above the heat exchange space, it flows out through the partition plate with holes arranged above the heat exchange space. By arranging the partition with holes, the outflow area of the airflow can be reduced, a pressure difference is formed on both sides of the heat exchange space, and the speed of the outflow of the airflow is increased, thereby helping to improve the heating effect of the cigarette. Simultaneously, the arrangement of the partitions makes it easy to form turbulent flow on both sides of the partition due to the increase of the air velocity, which is also beneficial to further uniform the temperature of the hot air.

A further solution is:

The outer wall of the central heat source is isolated from the heat exchange space by a material with excellent heat conduction. Through this setting, the airflow is prevented from directly contacting the heating element of the central heat source, thereby avoiding possible heavy metal pollution and improving safety.

A further solution is:

The materials with excellent thermal conductivity include: aluminum oxide, silicon oxide, zinc oxide, aluminum nitride, silicon carbide, graphite, ceramics and the like.

A further solution is:

The outer side of the heat exchange space is made of heat insulating material, which prevents the heat from being conducted to the outer side of the cigarette, causing the cigarette to be too hot and affecting the smoking of the cigarette, and also avoids heat loss and increases the temperature of the hot air flow.

A further solution is:

Due to the central heat source plus the heating method of the heat exchange space, in order to ensure the heating effect, the heat exchange space will not be set too large. When the air flow flows out, the temperature of the air flow directly above the heat exchange space is high, which can effectively heat the upper part. cigarettes, but the cigarettes not directly above the heat exchange space, and the cigarettes directly above the central heat source, because there is no or only a small amount of hot air flow through, the heating effect is poor. Based on this, the partition plate arranged above the heat exchange space is an arc-shaped structure with the center protruding outward. Through the setting of the arc-shaped structure, the hot air flow flowing from the heat exchange space will be evenly distributed to the bottom of the entire cigarette, so as to uniformly heat the cigarette and improve the taste of smoking.

The invention also provides a heated cigarette, which adopts the airflow heating cigarette mechanism provided by the invention.

The present invention effectively solves the problem of temperature stability and uniformity of the hot air flow for heating cigarettes through simple structural arrangement, has low cost, excellent effect and strong practical application effect.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a heated cigarette according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of an airflow heating cigarette mechanism according to an embodiment of the present invention;

Fig. 3 is a schematic top view of a heat exchange space according to another embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of the top of the heat exchange space according to another embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Accompanying drawing 1 has shown the overall structure schematic diagram of the heating cigarette of an embodiment of the present invention, can see, and heating cigarette is made up of power supply assembly 3, airflow heating cigarette mechanism 2 and cigarette stick 1 arranged in order, and power supply assembly 3 heats airflow The central heat source in the cigarette mechanism 2 supplies power, and the airflow heating cigarette mechanism 2 heats the airflow through the central heat source, and uses the heated hot airflow to heat the upper cigarette, thereby forming an aerosol for the smoker to inhale.

The core of the invention is illustrated by the following specific examples.

Embodiment one

As shown in Figure 2, an airflow heating cigarette mechanism includes a central heat source 21 and a heat exchange space 22 located around the center heat source. The airflow flows in from below the heat exchange space and forms a hot air flow with uniform temperature , the hot air flows out from above the heat exchange space and heats the cigarettes.

Among them, the central heat source 21 is powered by the power supply assembly 3 that comes with the cigarette. When the power supply assembly 3 is connected when necessary, the central heat source 21 starts to heat the heat exchange space 22. When smoking, the airflow passes through the heat exchange space and heats the cigarette 1. Heated to form an aerosol for smokers to inhale.

In this embodiment, the current conventional honeycomb heating method is eliminated, and the heating efficiency is effectively improved through the design of the heat exchange space, so as to ensure uniform temperature of the hot air flow.

As a further limitation, in order to ensure that the temperature of the hot air flow is uniform, the heat exchange space is located outside the central heat source, the central heat source adopts a cylindrical shape, and the overall shape of the heat exchange space is a circular cross-section coaxial with the cylindrical shape of the central heat source The cylindrical shape, the distance between the outer side of the heat exchange space and the outer wall of the central heat source is not more than 2.5mm, but not less than 1mm.

It is precisely because of the need to ensure the heating effect and the uniform temperature of the hot air flow, so the heat exchange space is located directly outside the central heat source, which completely wraps the central heat source in terms of form, and has high heating efficiency. At the same time, the heat exchange space is small, and the internal temperature of the heat exchange space is relatively balanced. The air flow is caused by the air flow during heat exchange, and the effect of uniform heating is achieved on the whole.

Embodiment two

The second embodiment is based on the first embodiment, and a partition plate 23 with holes is arranged on the top of the heat exchange space 22 . As shown in FIG. 3 , which is a top view of the heat exchange space, it can be seen that the separator 23 is arranged in a circular shape on the top of the heat exchange space. When the hot air flows out from above the heat exchange space, it flows out through the partition plate with holes arranged above the heat exchange space. By arranging the partition with holes, the outflow area of the airflow can be reduced, a pressure difference is formed at the front and rear ends of the heat exchange space, and the speed of the outflow of the airflow is increased, thereby helping to improve the heating effect of the cigarette. Simultaneously, the arrangement of the partitions makes it easy to form turbulent flow on both sides of the partition due to the increase of the air velocity, which is also beneficial to further uniform the temperature of the hot air.

As a further improvement of this embodiment, the area of the holes on the separator accounts for 50% to 75% of the total area of the separator. If the hole area is too small, the smoking force will be too large and the aerosol production will be small. The area of the hole in this embodiment has been calculated, and the influence on the air flow within this range is less, and at the same time, the flow rate of the air can be increased appropriately. The temperature of the thermal air above is uniform, and there is no obvious distinction between hot and cold.

Embodiment three

In the third embodiment, on the basis of the second embodiment, the separator is further improved. The separator of the second embodiment can accelerate the hot air flow into the cigarette to heat the cigarette, but since the separator is arranged above the heat exchange space, the hot air is concentrated directly above the heat exchange space, thus The heating effect on the cigarettes above the heat exchange space is better, but the heating effect on other parts of the cigarettes is slightly worse, which affects the overall heating effect.

Based on this, the inventor set the baffle above the heat exchange space as an arc-shaped structure that protrudes outward in the middle, that is, the baffle forms an arc along the radial direction of the ring, and the arc protrudes toward the cigarette branch . Its structure is shown in Figure 4, which is a schematic cross-sectional view of the top of the heat exchange space. Through the setting of the arc-shaped structure, the hot air flow flowing from the heat exchange space will be evenly distributed to the bottom of the entire cigarette, so as to uniformly heat the whole cigarette and improve the taste of smoking.

Embodiment four

The overall structure of this embodiment is the same as that of Embodiments 1 to 3, except that in this embodiment, the outer wall of the central heat source is isolated from the heat exchange space by a material with excellent heat conduction. For example, the central heat source and the heat exchange space are separated by aluminum oxide, silicon oxide, zinc oxide, aluminum nitride, silicon carbide, graphite, ceramics, etc. Through this setting, the airflow is prevented from directly contacting the heating element of the central heat source, thereby avoiding possible heavy metal pollution and improving safety.

Embodiment five

In this embodiment, on the basis of Embodiment 4, the outer side of the heat exchange space is set as a heat insulating material, so as to avoid heat conduction to the outer side of the cigarette and cause the cigarette to be overheated and affect the smoking of the cigarette, and at the same time avoid heat loss and improve the The temperature of the thermal.

Embodiment six

What this embodiment protects is a heated cigarette, which adopts the airflow heating cigarette mechanism of Embodiments 1 to 5. Its overall structure is divided into three parts, the upper part is the cigarette stick, the middle part is the airflow heating cigarette mechanism, and the lower part is the power supply system. When in use, the central heat source of the cigarette mechanism is heated by connecting the airflow through the power supply system. After the central heat source is heated, the internal temperature of the heat exchange space rises to meet the temperature standard for heating and non-combustible cigarettes. When smoking, the hot air flow enters the upper cigarette and faces the cigarette When heated, an aerosol is formed and enters the mouth.

It should be noted that the embodiments of the present invention and the accompanying drawings only show the core invention points of the present invention, and the necessary accessories, such as air holes, wires, brackets, temperature measuring components, etc. are not shown, which are of great importance to those skilled in the art. is routine.

Although the present invention has been described here with reference to the illustrative examples of the present invention, the above-mentioned examples are only preferred implementations of the present invention, and the implementation of the present invention is not limited by the above-mentioned examples. It should be understood that those skilled in the art Many other modifications and embodiments can be devised which will fall within the scope and spirit of the principles disclosed.

Claims (8)

1. An airflow heating cigarette mechanism, includes central heat source, its characterized in that: the cigarette also comprises a heat exchange space positioned around the central heat source, wherein air flows in from the lower part of the heat exchange space, and after passing through the heat exchange space, hot air with uniform temperature is formed, and the hot air flows out from the upper part of the heat exchange space and heats the cigarette.

2. The air flow heated cigarette mechanism of claim 1, wherein:

the heat exchange space is positioned at the 1-2.5mm periphery of the central heat source, the whole heat exchange space is cylindrical, and the central heat source is positioned at the central position of the cylindrical.

3. The air flow heated cigarette mechanism of claim 1, wherein:

a baffle plate with holes is arranged above the heat exchange space.

4. A gas flow heated cigarette mechanism as in claim 3 wherein:

the partition board is of an arc-shaped structure with the middle protruding outwards.

5. The air flow heated cigarette mechanism of any of claims 1 to 4 wherein:

the outer side wall of the central heat source is isolated from the heat exchange space by heat conduction excellent materials.

6. The air flow heated cigarette mechanism of claim 5, wherein:

the heat conduction excellent material includes: alumina, silica, zinc oxide, aluminum nitride, silicon carbide, graphite, ceramic.

7. The air flow heated cigarette mechanism of any of claims 1 to 4 wherein:

the heat exchange space is provided with a heat insulation material outside.

8. A heated cigarette, characterized in that the airflow heating cigarette mechanism as claimed in any one of claims 1 to 7 is employed.