Cigarette heating components and low-temperature smoking utensils

Abstract

The embodiment of the present application discloses a cigarette heating assembly and a low-temperature smoking device, which are used to improve the airflow distribution inside the cigarette and make the airflow distribution through the cigarette more uniform. The cigarette heating assembly provided by the embodiment of the present application includes a cigarette heating cylinder, which has a first end and a second end opposite to each other; wherein the first end is used to insert the cigarette, and the second end is a closed end; an airflow groove extending from the first end to the second end is provided on the inner side wall of the cigarette heating cylinder; a plurality of diverter bosses are provided on the inner bottom surface of the second end, and the plurality of diverter bosses are evenly spaced around the center point of the inner bottom surface in a circular shape; an annular diverter airway is formed between the diverter boss and the cigarette heating cylinder; the airflow groove and the side wall of the cigarette inserted in the cigarette heating cylinder form an air intake channel connecting the external air with the diverter airway.

Description

Technical Field

[0001] The invention belongs to the technical field of smoking articles, and in particular relates to a cigarette heating component and a low-temperature smoking article. Background Art

[0002] Heat-not-burn electronic tobacco products are a new type of tobacco that uses electric heating to bake and heat tobacco to reduce the release of harmful ingredients. Currently, the two mainstream heating methods are internal heating and external heating. Internal heating is to use a heating needle or heating sheet to insert into the tobacco of the cigarette for heating, while external heating is to use a heating device surrounding the outside of the cigarette for heating.

[0003] Previously, the applicant had used the method of opening a guide channel in patents such as CN2019205072076 to allow air to enter the cigarette. The guide channel was opened around the heating device, parallel to the axis of the cigarette, and the airflow went from top to bottom to the bottom of the cigarette, then reversed into the cigarette and was sucked out. For external heating equipment that uses a guide channel to intake air, if there are too many guide grooves, the heat generated by the heater will be taken away, affecting the normal heating of the cigarette. If there are too few guide grooves, at the bottom of the cigarette where the airflow turns, there will be a more serious unevenness in the airflow after entering the cigarette. It will only become more uniform after entering the cigarette for a certain distance, which will cause uneven heating of the tobacco section, affecting the release of tobacco components and the user's taste, and is also not conducive to the heat dissipation of the equipment. Summary of the invention

[0004] The embodiments of the present application provide a cigarette heating component and a low-temperature smoking device, which are used to improve the airflow distribution inside the cigarette and make the airflow distribution through the cigarette more uniform.

[0005] To this end, an embodiment of the present application provides a cigarette heating assembly, including:

[0006] The cigarette heating cylinder has a first end and a second end opposite to each other; wherein the first end is used for inserting the cigarette, and the second end is a closed end;

[0007] An air flow groove extending from the first end to the second end is provided on the inner side wall of the cigarette heating cylinder;

[0008] A plurality of flow-dividing bosses are arranged on the inner bottom surface of the second end, and the plurality of flow-dividing bosses are evenly distributed around the center point of the inner bottom surface in a circular ring shape;

[0009] An annular diversion airway is formed between the diversion boss and the cigarette heating cylinder;

[0010] The airflow groove and the side wall of the cigarette inserted into the cigarette heating cylinder form an air inlet channel that connects the external air with the diversion air channel.

[0011] In the embodiment of the present application, the airflow is diverted and guided by the diverter bosses before entering the cigarette, and enters the interior of the diverter bosses from the air inlet diverter ports between the diverter bosses, and finally enters the cigarette at a steady and uniform flow rate, so that the airflow rate in the cigarette is balanced and stable, thereby being able to more evenly bring out volatile substances such as smoke in the cigarette, giving consumers a more uniform and mellow taste.

[0012] In some embodiments, an airflow groove is provided on the inner wall of the cigarette heating cylinder.

[0013] In some embodiments, the diverter boss is arc-shaped.

[0014] In some embodiments, the extension direction of the airflow groove is parallel to the central axis of the cigarette heating tube.

[0015] In some embodiments, the number of the diverter bosses is three.

[0016] In some embodiments, the cigarette heating tube includes a heating tube with openings at both ends and a bottom cover arranged at the bottom of the heating tube.

[0017] In some embodiments, the diverter boss is disposed on the bottom cover.

[0018] In some embodiments, the bottom cover is detachably connected to the heating tube.

[0019] Another aspect of an embodiment of the present application provides a low-temperature smoking device, comprising a shell and a cigarette heating component of the above embodiment arranged in the shell.

[0020] In the low-temperature smoking device of the embodiment of the present application, the airflow is diverted and guided by the diverter bosses before entering the cigarette, and enters the interior of the diverter bosses from the air inlet diverter ports between the diverter bosses, and finally enters the cigarette at a steady and uniform flow rate, so that the airflow rate in the cigarette is balanced and stable, thereby being able to more evenly bring out volatile substances such as smoke in the cigarette, bringing consumers a more uniform and mellow taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of an existing cigarette heating component;

[0023] Figure 2 It is a simulation diagram of the airflow distribution between the bottom cover and the cigarette contact surface in the existing cigarette heating assembly;

[0024] Figure 3 It is a simulated diagram of the airflow distribution of the cross section of the cigarette at a distance of 1 cm from the contact surface between the bottom cover and the cigarette after the existing cigarette heating assembly is loaded with the cigarette;

[0025] Figure 4 is a schematic diagram of the structure of a cigarette heating assembly provided in an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a cigarette heating assembly provided in an embodiment of the present application after a cigarette is inserted;

[0027] Figure 6 yes Figure 5 A in the middle is an enlarged schematic diagram;

[0028] Figure 7 is a top view of the bottom cover of the cigarette heating assembly provided in an embodiment of the present application;

[0029] Figure 8 is an isometric view of a bottom cover in a cigarette heating assembly provided in an embodiment of the present application;

[0030] Fig. 9 This is a simulated diagram of the airflow distribution at the bottom cover when the cigarette heating assembly provided by the embodiment of the present application is in use;

[0031] Fig.10 This is a simulation diagram of the airflow distribution in the cross section of the cigarette at a distance of 1 cm from the contact surface between the bottom cover and the cigarette when the cigarette heating assembly provided in an embodiment of the present application is in use. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the existing cigarette heating assembly includes a heating tube 1 and a bottom cover 2, which are combined into a semi-sealed whole. The heating tube 1 is tubular, and its inner wall partially bulges outward to form an air flow groove 3 extending along the length direction of the heating tube 1. An air inlet 4 is provided on the bottom cover 2, which is connected to the air flow groove 3, so that the gas transmitted from the airway can reach the bottom cover 2 from the air inlet 4 and further enter the heating tube 1.

[0034] Figure 2This is a simulated diagram of the airflow distribution between the bottom cover 2 of the cigarette heating assembly in the prior art and the contact surface of the cigarette. Figure 3 This is a simulated diagram of the airflow distribution of the cross section of the cigarette at a distance of 1 cm from the contact surface between the bottom cover 2 and the cigarette after the cigarette heating assembly of the prior art is loaded with the cigarette ( Figure 2 and Figure 3 The simulation state is carried out without opening the air inlet hole on the cigarette. Figure 1 , Figure 2 and Figure 3 As shown, when the cigarette heating assembly is in use, the airflow enters from the airflow groove 3, and reaches the bottom cover 2 along the airflow groove 3, enters the bottom cover 2 after impacting the plane at the position of the air inlet 4 of the bottom cover 2, and then enters the inside of the cigarette in the heating tube 1, and finally flows out from the filter of the cigarette. Since the airflow enters the bottom cover 2 after being impacted at the position of the air inlet 4 of the bottom cover 2, the direction of the airflow after entering the bottom cover 2 from the air inlet 4 and the strength in each direction will change greatly, such as Figure 2 As shown, the airflow is impacted at the air inlet, and the direction of the airflow presents multi-directional chaotic changes. The airflows in different directions cancel each other out during the conflicts, resulting in a smaller flow rate there. When the airflow reaches the area relatively central to the bottom cover 2 and far away from the air inlet 4, the direction of the airflow gradually becomes unified and the flow rate becomes relatively large, thus presenting an uneven flow rate state.

[0035] When the airflow enters the cigarette from the bottom cover 2, the above-mentioned uneven airflow gradually disappears. Figure 3 As shown in the figure, at a distance of 1 cm from the contact surface between the bottom cover 2 and the cigarette, the uneven state of the airflow has become smooth. The above simulation process is carried out when the cigarette itself has no air inlet holes. If the cigarette has air inlet holes, the uneven flow rate will be aggravated, which will have an extremely obvious adverse effect on the taste of the cigarette when smoking.

[0036] See also Figure 4 The cigarette heating assembly provided in the implementation of the present application includes a cigarette heating tube, which has a first end and a second end opposite to each other; wherein the first end is used to insert the cigarette, and the second end is a closed end, and an airflow groove 3 extending from the first end to the second end is provided on the inner side wall of the cigarette heating tube, and a plurality of diverter bosses 5 are provided on the inner bottom surface of the second end, and the plurality of diverter bosses 5 are evenly distributed in a circular ring shape around the center point of the inner bottom surface, and an annular diverter airway 6 is formed between the diverter boss 5 and the cigarette heating tube, and the airflow groove 3 and the side wall of the cigarette 7 inserted in the cigarette heating tube form an air inlet channel connecting the external air with the diverter airway 6.

[0037] Specifically, the cigarette heating tube includes a heating tube 1 and a bottom cover 2. The bottom cover 2 is arranged at the bottom of the heating tube 1, so that the heating tube 1 is opened at one end and closed at the other end. The airflow groove is staggered with the air inlet diversion port formed between two adjacent diversion bosses on the cigarette heating tube.

[0038] like Figure 5 As shown, in the embodiment of the present application, the inner wall of the heating tube 1 partially bulges away from the central axis along the length direction of the heating tube 1 to form a partially hollow airflow channel. When a cigarette is inserted into the heating tube 1, airflow can enter from the airway, then enter the cigarette, and finally flow out of the cigarette. Figure 6 As shown, the airflow channel is connected to the space formed by the heating tube 1 and the bottom cover 2, and the bottom cover 2, the heating element and the cigarette form an annular diversion airway 6, so that the gas entering from the airflow channel is diverted by the diversion airway 6 and enters the cigarette more evenly from the air inlet diversion port 8 of the bottom cover 2.

[0039] See also Figure 6-Figure 7 In other embodiments, the bottom cover is detachably connected to the heating tube by means of snap connection or buckle connection, and the diversion boss is arranged on the bottom cover. In the embodiment of the present application, the bottom cover is detachably connected to the heating tube, and the residues such as smoke oil produced by smoking will be deposited on the bottom cover. The entire heating component can be cleaned by removing the bottom cover, and the heating component is easy to clean.

[0040] like Figure 7 and Figure 8 As shown, in some embodiments, in order to minimize the airflow groove from taking away the heat generated by the heater and affecting the normal heating of the cigarette, only one airflow groove is set on the inner wall of the heating tube 1 of the heating assembly of the embodiment of the present application, and three diverter bosses 5 are provided on the bottom cover 2. Three air inlet diverter ports 8 are formed between the three diverter bosses 5. The air inlet diverter ports 8 are evenly arranged on the bottom cover 2. The diverter bosses 5 are distributed in a circular shape around the center point of the bottom cover 2, and the position of the bottom cover 2 is a certain distance from the edge of the bottom cover 2, so that the airflow can flow in the annular diverter airway 6 outside the diverter boss 5 before entering from the air inlet diverter port 8.

[0041] Combination Figure 6 , Figure 7 and Figure 8After the bottom cover 2 is buckled onto the heating tube 1, the airway ear 9 of the bottom cover 2 fits with the airflow groove of the heating tube 1, and blocks the airflow in the airflow groove 3, and guides the airflow in the airflow groove 3 to the bottom cover 2. After the airflow transmitted from the airflow groove 3 reaches the bottom cover 2, most of it passes through the diversion airway 6 composed of the bottom cover 2 (including the bottom surface of the bottom cover 2 and the diversion boss 5), the inner wall of the heating body and the cigarette, moves along the direction around the diversion boss 5, and finally enters between the diversion bosses 5 from the air inlet diversion port 8 between the diversion bosses 5, and then enters the cigarette. (A small part of the airflow directly enters the cigarette from the space between the diversion boss 5 and the inner wall of the cigarette). In order to facilitate the flow of gas, the shape of the diversion boss 5 is preferably set to an arc.

[0042] See also Fig. 9 When the heating assembly in the embodiment of the present application is used to heat a cigarette, the airflow on the contact surface between the bottom cover 2 and the cigarette 7 enters the bottom cover 2 from three directions after being diverted. The uniformity of the airflow after buffering is greatly improved. Although there is still multi-directional airflow offset in some parts, the offset has been greatly weakened. Secondly, the distribution of multi-directional airflow is also uniform. Therefore, the uniformity of the airflow entering the cigarette from here is greatly improved, which is significantly improved compared with the prior art. Fig.10 It can be seen that the airflow in the cigarette 7 at a distance of 21 cm from the bottom cover has achieved good uniformity, which is a great improvement compared with the prior art.

[0043] Through the above process, it can be known that the airflow is diverted and guided by the diverter boss 5 before entering the cigarette 7, and enters the inside of the diverter boss 5 from the three air inlet diverter ports 8, and finally enters the cigarette at a steady and uniform flow rate, so that the airflow velocity in the cigarette is balanced and stable, so that the smoke and other volatile substances in the cigarette can be more evenly brought out, bringing consumers a more uniform and mellow taste.

[0044] In some embodiments, the heating tube 1 includes a heat-conducting insulating tube and a heating element, and the heating element is attached and fixed to the inner wall or outer wall of the heat-conducting insulating tube. Of course, the heating element can also be directly pre-buried in the heat-conducting insulating tube. In practical applications, the heat-conducting insulating tube can be a ceramic tube.

[0045] On the other hand, an embodiment of the present application provides a low-temperature smoking device, including a shell and a cigarette heating component of the above embodiment arranged in the shell. As for other structures of the smoking device, they are all existing technologies and will not be described in detail here.

[0046] When heating a cigarette in the embodiment of the present application, the cigarette is inserted into the heating tube 1, and the filter segment is at least partially exposed from the heating tube 1. When the user inhales, he holds the filter segment and inhales. Under the action of the negative pressure of suction, the external air passes through the air intake channel, the diversion airway 6, and the air intake diversion port 8 in sequence to reach the inside of the diversion boss 5, and finally enters the cigarette from the bottom end of the cigarette (the air intake end) to bring the smoke generated by the heated tobacco segment to the user's mouth. In order to reduce the smoke temperature and improve the smoking taste, a condensation transition section can also be set between the tobacco segment and the filter segment.

[0047] In this embodiment, the bottom of the heating tube 1 is closed, and the air inlet channel is directly arranged in the heating tube 1. The condensate formed during the heating process of the cigarette and the dropped tobacco will be concentrated in the cigarette insertion cavity, and will not flow to other parts of the smoking device. The entire smoking device can be cleaned by a cleaning tool such as a brush, which is very convenient. In addition, when the cigarette is inserted or removed, the inner wall of the heating tube 1 is cleaned to ensure that there is no strong tobacco smell after the device is used.

[0048] In addition, even if a small amount of smoke flows back from the air inlet end of the cigarette into the heating tube 1, because the air inlet channel passes through the high-temperature zone, the backflowing smoke can only form condensate when the heating element finishes working and the temperature changes from high to low, so very little condensate is formed.

[0049] In particular, by glazing the inner wall of the heating tube 1, since the inner surface of the heating tube 1 is smooth, the condensate will not be adsorbed on the inner wall, and a small amount of condensate will be adsorbed on the paper wall of the cigarette.

[0050] It should be noted that the heating method can also adopt the central heating method, but compared with the surrounding heating method in which the heating element is directly inserted into the cigarette, there is a problem that the tobacco sticks to the heating element and needs to be cleaned.

[0051] The above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. Cigarette heating assembly, including: The cigarette heating cylinder has a first end and a second end opposite to each other; wherein the first end is used for inserting the cigarette, and the second end is a closed end; An air flow groove extending from the first end to the second end is provided on the inner side wall of the cigarette heating cylinder; The feature is that: a plurality of flow-dividing bosses are arranged on the inner bottom surface of the second end, and the plurality of flow-dividing bosses are evenly spaced and distributed around the center point of the inner bottom surface in a circular ring shape; An annular diversion airway is formed between the diversion boss and the cigarette heating cylinder; The airflow groove and the side wall of the cigarette inserted into the cigarette heating cylinder form an air intake channel connecting the external air with the diversion air channel; An airflow groove is provided on the inner side wall of the cigarette heating cylinder; The diverter boss is arc-shaped; The airflow groove is staggered on the cigarette heating tube and is arranged to be separated from the air inlet diversion port formed between two adjacent diversion bosses.

2. The cigarette heating assembly according to claim 1, characterized in that: The extension direction of the airflow groove is parallel to the central axis of the cigarette heating tube.

3. The cigarette heating assembly according to claim 1, characterized in that: The number of the diverter bosses is three.

4. The cigarette heating assembly according to claim 1, characterized in that: The cigarette heating tube comprises a heating tube with openings at both ends and a bottom cover arranged at the bottom of the heating tube.

5. The cigarette heating assembly according to claim 4, characterized in that: The diversion boss is arranged on the bottom cover.

6. The cigarette heating assembly according to claim 4, characterized in that: The bottom cover is detachably connected to the heating tube.

7. A low-temperature smoking device, including a housing, characterized in that: It also includes a cigarette heating assembly as described in any one of claims 1-6 arranged in the shell.

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