CN108552602B - Electric heating smoking device with heat distribution function - Google Patents

Abstract

The invention relates to an electrically heated smoking device with heat distribution function, comprising the following components: a housing (1) having an air inlet hole therein; the heat insulation pipe (16) is provided with a third vent hole (11), the venturi tube type heat storage pipe (13) is positioned in a cavity of the heat insulation pipe (16), and the nut (7) is fixedly connected with the nut turntable (7 a).

Description

An electric heating smoking device with heat distribution function

Technical field

The invention belongs to the field of electronic cigarette smoking products, and specifically relates to an electric heating smoking device with a heat distribution function.

Background technique

Existing cigarettes use a direct ignition method. Although it is simple and convenient, because the tobacco is directly heated and ignited, a certain amount of harmful ingredients such as tar and nicotine will be produced during the smoking process, which will have a certain impact on the health of smokers. The existing low-temperature heating of cigarettes uses electric heating appliances. Various forms of heating appliances such as electrically heated tubes, needles or plates are in direct contact with cigarettes or tobacco shreds, and the cigarette is heated at a temperature lower than the ignition point of the cigarette. The direct contact baking of cigarettes or cut tobacco volatilizes the aroma-causing components of tobacco to meet smokers' smoking requirements. The problem with this method of heating cigarettes or cut tobacco is that the cut tobacco in direct contact with the cigarette or cut tobacco can It is fully baked, but the cut tobacco located slightly far away from the heating element is not fully baked, and there is a certain unevenness in the circumferential cross-section of the cigarette. On the other hand, although the heating appliance itself is small in size and has low heat capacity, smokers still need to wait for a certain amount of time before smoking. After smoking, because the heating element is in direct contact with the shredded tobacco, even if the heating element is powered As a result, the residual heat on the heating element can still heat and bake the cut tobacco, which means that the smoker consumes a certain amount of cut tobacco on the cigarette during the interval between smoking.

Existing charcoal-heated cigarettes use a carbon rod attached to the front end of the cigarette to ignite and quickly heat the air flowing through the carbon rod. When the hot air continues to flow under the negative pressure of the smoker's suction, When passing through the shredded tobacco part at the rear end of the cigarette, the shredded tobacco is baked and heated to achieve non-burning heating of the shredded tobacco part, which can obtain the tobacco aroma and avoid, to a certain extent, harmful substances such as tar and nicotine that are produced in large quantities due to ignition. . Although this type of charcoal-heated cigarette is less harmful than existing ordinary cigarettes, a carbon rod is attached to the front end of the cigarette, which not only increases the difficulty of manufacturing the cigarette and affects production efficiency; it also causes consumers to light the carbon rod. It takes a long time, is difficult to ignite, and has certain odor when burning charcoal rods. Similarly, after the charcoal rod is ignited, it is also an uncontrollable process. When not smoking, there is also baking of the cut tobacco, and the end of the charcoal rod is also in direct contact with or relatively close to the cut tobacco. There is also some damage at the end of the burning charcoal rod. There is a problem of direct baking or even burning of a small amount of residual tobacco.

In addition, the method of directly baking and heating the cigarette or shredded tobacco and charcoal heating of cigarettes. Because the cigarette part is short and the filter tip is very close to the heating section, it is also necessary to add a cooling structure to the filter tip, which invisibly increases the cost. This increases the difficulty and cost of manufacturing cigarettes and affects production efficiency; at the same time, the heat generated by existing electrically heated cigarettes often has residual heat or excess heat accumulated in the smoking set, causing the temperature of the smoking set to be too high and easily causing burns to smokers. It will also cause energy waste.

Contents of the invention

The invention relates to an electrically heated smoking device with a heat distribution function, which effectively solves the problems of uneven heating of electrically heated cigarettes, easy burning, insufficient aroma components and poor smoking feel.

An electric heating smoking device with heat distribution function, which includes the following components:

The shell 1 has an air inlet hole on it, and includes a rib plate 1a, and the rib plate 1a is provided with a first ventilation hole 14;

The heat insulation pipe 16 is located in the housing 1 and has a third vent hole 11 on its side wall. The heat insulation pipe 16 can be detachably installed on the heat insulation pipe base 8 with a cavity. The pipe base 8 can be detachably installed on the rib plate 1a;

The Venturi tube type heat storage tube 13 is located in the cavity of the heat insulated tube 16 and includes: a gas collecting pipe (3a) and a preheating pipe 13d. The gas collecting pipe 13a and the preheating pipe 13d pass through the heat storage pipe. The direct heating throat 13b surrounded by the body 13c is connected by air flow, and the cavity of the preheating pipe 13d is the cigarette containing cavity 17;

The nut 7 is fixedly connected to the nut turntable 7a. The nut turntable 7a is partially exposed outside the housing 1. The nut 7 is movably installed in the cavity of the heat insulation pipe base 8. The nut 7 A T-shaped hollow screw 5 is accommodated in the cavity. The diameter of the T-shaped end of the screw 5 is larger than the diameter of the cavity of the nut 7. A screw snap ring 4 is installed on the non-T-shaped end of the screw 5. There is a heating wire 12 in the cavity of the screw 5, and the heating wire 12 extends into the gas collecting pipe 13a;

The cigarette accommodating cavity 17, the heating wire 12 and the air inlet hole on the housing 1 are connected in an air flow conductive manner.

In the preferred embodiment of the present invention, the cigarette holder 18 reserves an appropriate length, such as 5-30 mm, in which the shredded tobacco is a non-heated section. By utilizing the heat absorption effect of this section of shredded tobacco, existing ordinary tobacco can be used. The structure of the filter will not cause burns to the smoker's mouth when smoking the cigarette.

In the preferred embodiment of the present invention, it also includes a circuit board 3 and a nut retaining ring 9. The circuit board 3 is located in the housing 1 and is electrically connected to the heating wire 12; the nut 7 is connected to the heat insulation ring 9. The tube seat 8 is sealed and connected through the nut retaining ring 9 .

The preferred embodiment of the present invention also includes a cigarette holder 18 made of high-temperature resistant, non-thermally conductive material. The preheating pipe 13d is detachably installed on the housing 1 through the cigarette holder 18.

In the preferred embodiment of the present invention, the venturi type heat storage tube 13 also includes a transverse heating throat 13e and a block 13f. The block 13f is located upstream of the direct heating throat 13b and passes through the transverse heating throat. 13e is fixedly connected to the direct heating throat 13b, the airflow of the transverse heating throat 13e and the direct heating throat 13b is connected, and there is a gap between the stopper 13f and the gas collecting pipe 13a.

In a preferred embodiment of the present invention, the gas collecting pipe 13a, the preheating pipe 13d and the heat storage body 13c are processed separately, and then connected and combined into one body through interference fit, welding or threading.

In the preferred embodiment of the present invention, the rib plate 1a is also provided with a second vent hole 10, and the second vent hole 10 is connected to the first vent hole 14 and the third vent hole 11 for air flow. .

In a preferred embodiment of the present invention, the heating wire 12 is composed of at least one coil spring-shaped or flat mosquito-repellent coil-shaped heating wire connected in parallel or in series.

In a preferred embodiment of the present invention, a heat insulation sleeve 19 is provided in the gap between the gas collecting pipe 13a and the heat insulation pipe 16.

In a preferred embodiment of the present invention, the heat insulation sleeve 19 is made of high-temperature resistant non-metallic material, such as ceramics.

In a preferred embodiment of the present invention, when the heating wire 12 is a flat disc-shaped heating wire, the heating wire is an alloy conductive heating material that is resistant to oxidation and has a certain mechanical strength.

In the preferred embodiment of the present invention, the liquid storage 13c is used to absorb the residual heat of the heating wire 12 and transfer the heat to the preheating tube 13d to preheat the cigarette.

In the preferred embodiment of the present invention, by rotating the nut turntable 7a, the nut turntable 7a drives the nut 7 to rotate circumferentially in the cavity of the heat insulation pipe base 7, and the screw 5 is used in the machinery industry. The well-known limiting rotation mechanism (not shown in the figure) limits its rotation with the nut 7, so when the nut 7 rotates, the screw cannot rotate with it, but moves up and down under the action of the nut, while being fixed in the screw 5 The heating wire 12 moves up and down, thereby changing the distance between the heating wire 12 and the heat collecting tube 13a, the direct heating throat 13b and the heat storage body 13c, and changing the radiation energy transfer relationship between them. Thereby achieving the purpose of regulating heat distribution.

The working process of the present invention is as follows: Insert the cigarette to be smoked from the cigarette holder 18 hole into the cigarette receiving cavity of the preheating tube 13d, start the switch 15, the heating wire 12 starts to generate heat, and the air Enter the inside of the smoking article from the gap between the housing 1 and the nut turntable 7a, and enter the heat-insulating pipe base through the first ventilation hole 14, the second ventilation hole 10 and the third ventilation hole 11 8, the heating wire 12 heats the air. Part of the heated air enters the air collecting pipe 13a, and part of it is absorbed by the heat storage body 13c and quickly transfers the heat to the lower temperature preheater. The pipe 13d preheats the cigarettes, and the other part of the hot air passes through the direct heating throat 13b with the negative pressure generated by the smoker's puffing, fully heating the cigarettes that have been preheated by the preheating pipe 13d. , until the shredded tobacco near the filter tip is baked, and the hot air with tobacco aroma is cooled by part of the shredded tobacco at the end of the cigarette and the filter tip section, and becomes a temperature acceptable to the smoker's mouth, and is inhaled by the smoker to complete a puff. The smoking process of smoke. Before the smoker inhales the next puff of smoke, the residual heat stored in the heat collecting tube 13a, the heat storage body 13c and the preheating pipe 13d preheats the cigarette. At the same time, the cigarette can also be preheated by changing the heat storage body 13c. The volume increases the amount of heat stored, and at the same time, it can reduce the airflow of hot air entering the cigarette receiving cavity through the direct heating throat 13b, thereby avoiding the problem of rapid carbonization of the shredded tobacco at the upstream end of the cigarette.

The present invention can also adjust the relative position of the heating wire 12 and the heat collecting tube 13a to adjust the amount of heat distributed to the heat collecting tube 13a and the amount of heat collected by the heat storage body 13c, thereby realizing direct use of the heat collecting tube 13a. The heat directly heated by the direct heating throat 13b of the cigarette is redistributed with the heat stored in the heat collecting tube 13a and the heat storage body 13c.

The beneficial effects of the present invention are as follows:

1. The present invention rotates the nut turntable, and the nut turntable drives the nut to rotate circumferentially in the cavity of the heat-insulating tube holder. The nut drives the screw to move up and down, and at the same time, the heating wire fixed in the screw moves up and down, thereby changing the direction of the heating wire. The distance between the heat pipe, the direct heating throat and the heat storage body changes the radiation energy transfer relationship between them, thereby achieving the purpose of adjusting heat distribution.

2. The present invention collects part of the hot air heated by the heating wire into the heat collecting tube and the heat storage body by setting up a venturi tube type heat storage tube, and preheats the cigarettes in advance by transferring the hot air to the preheating tube. This achieves the diversion effect of hot air, prevents the hot air temperature from being too high and scorching the tobacco, and at the same time realizes the redistribution and utilization of heat.

3. By adding a horizontal heating throat and a block, the hot air heated by the heating wire can be prevented from directly entering the direct heating throat, preventing the hot air from flowing too fast and having too much heat to scorch the tobacco. On the other hand, it can better scorch the tobacco. A large amount of heat is stored in the heat storage body and transferred to the relatively low-temperature preheating tube to fully preheat the cigarette.

4. The present invention can also realize the distribution and adjustment of heat by selecting heat storage bodies 13c of different sizes to suit the cigarette being smoked.

5. By utilizing the temperature difference caused by the attenuation of heat in the non-heated section of shredded tobacco between the preheating tube and the filter, the present invention can achieve the purpose of preventing excessive heat in the cigarette from directly reaching the filter and causing burns to the smoker's mouth. Instead of installing a special heat-reducing filter with complex structure, high cost and difficulty in manufacturing on the cigarette, the production difficulty and manufacturing cost are reduced, the cigarette manufacturing process is simplified, and the production efficiency is improved; using the existing cigarette that needs to be lit Cigarettes can also be smoked in a "heat-not-burn" mode.

Description of the drawings

Figure 1 is a schematic three-dimensional structural diagram of the device of the present invention;

Figure 2 is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

Figure 3 is an A-A view of Embodiment 1 of the present invention;

Figure 4 is a schematic diagram of the internal structure of Embodiment 2 of the present invention;

Figure 5 is a schematic diagram of the internal structure of the Venturi tube type heat storage tube in Embodiment 3 of the present invention;

The symbols in the figures have the following meanings:

1-Shell, 1a-rib plate; 2-battery; 3-circuit board; 4-screw snap ring; 5-screw; 6-insulation sleeve; 7-nut, 7a-nut turntable; 8-insulation pipe holder, 9 -Nut retaining ring; 10-Second vent hole; 11-Third vent hole; 12-Heating wire; 13-Venturi tube type heat storage tube, 13a-Air collecting pipe, 13b-Direct heating throat, 13c-Heat storage body, 13d-preheating tube, 13e-transverse heating throat, 13f-block; 14-first ventilation hole; 15-switch; 16-insulation tube; 17-cigarette receiving cavity; 18-cigarette holder; 19-isolation Heat sleeve, 20-Fourth vent.

Detailed ways

The present invention will be further described in detail below with reference to the examples and drawings. The examples are only for illustrating the present invention but not for limiting the present invention.

Example 1

An electric heating smoking device with heat distribution function, which includes the following components:

The shell 1 has an air inlet hole on it, and includes a rib plate 1a, and the rib plate 1a is provided with a first ventilation hole 14;

The heat insulation pipe 16 is located in the housing 1 and has a third vent hole 11 on its side wall. The heat insulation pipe 16 can be detachably installed on the heat insulation pipe base 8 with a cavity. The pipe base 8 can be detachably installed on the rib plate 1a;

The Venturi tube type heat storage tube 13 is located in the cavity of the insulated tube 16 and includes: a gas collecting pipe 13a and a preheating pipe 13d. The gas collecting pipe 13a and the preheating pipe 13d pass through the heat storage body. The direct heating throat 13b surrounded by 13c is connected by air flow, the cavity of the preheating pipe 13d is the cigarette accommodating cavity 17, and the cavity of the gas collecting pipe 13a is the heating wire accommodating cavity 21;

The nut 7 is fixedly connected to the nut turntable 7a. The nut turntable 7a is partially exposed outside the housing 1. The nut 7 is movably installed in the cavity of the heat insulation pipe base 8. The nut 7 A T-shaped hollow screw 5 is accommodated in the cavity. The diameter of the T-shaped end of the screw 5 is larger than the diameter of the cavity of the nut 7. A screw snap ring 4 is installed on the non-T-shaped end of the screw 5. There is a heating wire 12 in the cavity of the screw 5. The outside of the heating wire 12 is wrapped with an insulating sleeve 6 and extends into the gas collecting pipe 13a;

The cigarette accommodating cavity 17, the heating wire 12 and the air inlet hole on the housing 1 are connected in an air flow conductive manner.

In this embodiment, it also includes a circuit board 3 and a nut retaining ring 9. The circuit board 3 is located in the housing 1 and is electrically connected to the heating wire 12; the nut 7 and the heat-insulating tube base 8 The nut retaining ring 9 is used for sealing connection.

In this embodiment, a cigarette holder 18 is also included. The preheating pipe 13d is detachably mounted on the outer shell 1 through the cigarette holder 18 .

In this embodiment, the gas collecting pipe 13a, the preheating pipe 13d and the heat storage body 13c are processed separately, and then connected and combined into one body through interference fit or threading.

In this embodiment, the rib plate 1a is also provided with a second vent hole 10, and the second vent hole 10 is connected to the first vent hole 14 and the third vent hole 11 for air flow.

In this embodiment, by rotating the nut turntable 7a, the nut turntable 7a drives the nut 7 to rotate circumferentially in the cavity of the heat insulation pipe base 7, and the nut 7 drives the screw rod 5 to move up and down. , and at the same time, the heating wire 12 fixed in the screw 5 moves up and down, thereby changing the distance between the heating wire 12 and the heat collecting tube 13a, the direct heating throat 13b and the heat storage body 13c. The radiation energy transfer relationship between them is determined to achieve the purpose of regulating heat distribution.

The working process of this embodiment is as follows: Insert the cigarette to be smoked from the cigarette holder 18 hole into the cigarette receiving cavity of the preheating tube 13d, activate the switch 15, and the heating wire 12 starts to generate heat. The air enters the inside of the smoking article from the gap between the outer shell 1 and the nut turntable 7a, and enters the heat-insulating tube through the first vent hole 14, the second vent hole 10 and the third vent hole 11 In the cavity of the seat 8, the heating wire 12 heats the air. Part of the heated air enters the air collecting pipe 13a, and part of it is absorbed by the heat storage body 13c and quickly transfers the heat to the lower temperature preheater. The heat pipe 13d preheats the cigarettes, and the other part of the hot air passes through the direct heating throat 13b due to the negative pressure generated by the smoker's puffing, fully heating the cigarettes that have been preheated by the preheating pipe 13d. Heating until the shredded tobacco near the filter tip is baked, the hot air with tobacco aroma, after cooling down part of the shredded tobacco at the end of the cigarette and the filter tip section, becomes a temperature acceptable to the smoker's mouth and is inhaled by the smoker. The process of smoking a puff of smoke. Before the smoker inhales the next puff of smoke, the residual heat stored in the heat collecting tube 13a, the heat storage body 13c and the preheating pipe 13d preheats the cigarette. At the same time, the cigarette can also be preheated by changing the heat storage body 13c. The volume increases the heat stored, and at the same time reduces the airflow of hot air entering the cigarette receiving cavity through the direct heating throat 13b, thereby avoiding the problem of rapid carbonization of the shredded tobacco at the upstream end of the cigarette.

Example 2

The difference between this embodiment and Embodiment 1 is that the height adjustment mechanism of the heating wire 12 is simplified, and by selecting the size of the heat storage body 13c, matching with the cigarette to be smoked is achieved.

The working principle of this embodiment is the same as that of Embodiment 1.

Example 3

The difference between this embodiment and Embodiment 1 is that a transverse heating throat 13e and a block 13f are added to the venturi type heat storage tube. By adding the transverse heating throat and the block, the hot air heated by the heating wire can be prevented from being directly Entering the direct heating throat prevents the hot air from flowing too fast and the heat from burning the tobacco. On the other hand, it can better store more heat into the heat storage body and transfer it to the preheating tube with a relatively low temperature. , to achieve sufficient preheating of cigarettes.

The working principle of this embodiment is the same as that of Embodiment 1.

Claims (3)

1. An electric heating smoking device with heat distribution function, characterized in that it includes the following components: The shell (1) has an air inlet hole on it and includes a rib plate (1a), and the rib plate (1a) is provided with a first ventilation hole (14); The heat-insulating tube (16) is located in the housing (1) and has a third ventilation hole (11) on its side wall. The heat-insulating tube (16) can be detachably installed on the heat-insulating tube with a cavity. On the base (8), the heat insulation pipe base (8) can be detachably installed on the rib plate (1a); A Venturi tube type heat storage tube (13) is located in the cavity of the insulated tube (16) and includes: a gas collecting pipe (13a) and a preheating pipe (13d). The gas collecting pipe (13a) and the The preheating tube (13d) is connected by air flow through the direct heating throat (13b) surrounded by the heat storage body (13c), and the cavity of the preheating tube (13d) is the cigarette containing cavity (17); The nut (7) is fixedly connected to the nut turntable (7a). The nut turntable (7a) is partially exposed outside the housing (1). The nut (7) is movably installed on the heat insulation pipe seat. In the cavity of (8), a T-shaped hollow screw (5) is accommodated in the cavity of the nut (7), and the diameter of the T-shaped end of the T-shaped hollow screw (5) is larger than that of the nut (7). The diameter of the cavity, the non-T-shaped end of the T-shaped hollow screw (5) is equipped with a screw snap ring (4), and the cavity of the T-shaped hollow screw (5) has a heating wire (12), so The heating wire (12) extends into the air collecting pipe (13a); The cigarette accommodating cavity (17), the heating wire (12) and the air inlet hole on the housing (1) are connected in an airflow conductive manner; The electric heating smoking device also includes a circuit board (3) and a nut retaining ring (9). The circuit board (3) is located in the housing (1) and is electrically connected to the heating wire (12); The nut (7) and the heat insulation pipe seat (8) are sealingly connected through the nut retaining ring (9); The electric heating smoking device also includes a cigarette holder (18), and the preheating pipe (13d) is detachably installed on the housing (1) through the cigarette holder (18); The venturi type heat storage tube (13) also includes a transverse heating throat (13e) and a block (13f). The block (13f) is located upstream of the direct heating throat (13b) and passes through the transverse heating throat (13b). The hot throat (13e) is fixedly connected to the direct hot throat (13b), the transverse hot throat (13e) and the direct hot throat (13b) have air flow conduction, and the stopper (13f) is connected to the gas collecting pipe. There is a gap between (13a); The rib plate (1a) is also provided with a second vent hole (10), and the second vent hole (10) guides the air flow with the first vent hole (14) and the third vent hole (11). pass connection; The length of the cigarette holder (18) is reserved at 5-30 mm, and the shredded tobacco in it is a non-heated section. By utilizing the heat absorption effect of this section of shredded tobacco, cigarettes with the structure of existing ordinary filter tips can be used for smoking. It will not cause burns to the smoker's mouth. 2. The electric heating smoking device with heat distribution function according to claim 1, characterized in that the heating wire (12) is composed of at least one coil spring-shaped or flat mosquito-repellent coil-shaped heating wire connected in parallel or in series. 3. The electric heating smoking device with heat distribution function according to claim 2, characterized in that a heat insulation sleeve (19) is provided in the gap between the gas collecting pipe (13a) and the heat insulation pipe (16). ).