Low-temperature baking smoking utensils that take in air from the side of the cigarette

Abstract

The present invention discloses a low-temperature baking smoking device that takes in air from the side of a cigarette, comprising a shell provided with a cigarette insertion cavity and a heating element for heating the cigarette in the cigarette insertion cavity, one end of the cigarette insertion cavity being a cigarette insertion end and the other end being a closed end, the inner side wall of the cigarette insertion cavity being provided with at least one airflow groove extending from the cigarette insertion end to the closed end, the airflow groove and the side wall of the cigarette inserted in the cigarette insertion cavity forming an air intake channel that connects the external air with the cigarette intake end. The present invention directly arranges the air intake channel in the cigarette insertion cavity, and the condensate formed in the cigarette heating process and the dropped tobacco will be concentrated in the cigarette insertion cavity, and will not flow to other parts of the smoking device, making the smoking device easy to clean.

Description

Technical Field

[0001] The invention belongs to the technical field of smoking articles, and in particular relates to a low-temperature baking smoking article that takes in air from the side of a cigarette. Background Art

[0002] The existing smoking devices on the market generally use straight-through air ducts. The air ducts are too long, condensate a lot, and are difficult to clean. Gas enters the interior of the smoking device, which makes it easy for the smoking device to malfunction, shortening the life of the device. The entire device has a strong smell of smoke after being used several times.

[0003] Chinese patents 2017206386809, 2018205939467, 2018205939467, etc. disclose a low-temperature smoking device with side air intake, which achieves the purpose of heat exchange to reduce the temperature of the smoking device shell by arranging a side air intake channel between the heating chamber and the shell, and the air intake channel is connected to the bottom of the heating chamber, but the above patents still have the problem of condensation entering the interior of the smoking device and contaminating the smoking device. Summary of the invention

[0004] The present application aims to solve one of the technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a low-temperature baking smoking device that takes in air from the side of the cigarette.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] A low-temperature baking smoking device that takes in air from the side of a cigarette, comprising a shell provided with a cigarette insertion cavity and a heating element for heating the cigarette in the cigarette insertion cavity, wherein one end of the cigarette insertion cavity is a cigarette insertion end, and the other end is a closed end, and the inner wall of the cigarette insertion cavity is provided with at least one airflow groove extending from the cigarette insertion end to the closed end, and the airflow groove and the side wall of the cigarette inserted in the cigarette insertion cavity form an air intake channel connecting the external air with the cigarette air intake end.

[0007] Furthermore, the air inlet channel is arranged in parallel with the cigarette insertion cavity and the area of ​​its cross section is between 1.1-1.5 square millimeters.

[0008] Furthermore, the air inlet channels are evenly arranged along the circumferential direction of the cross section of the cigarette insertion cavity.

[0009] Furthermore, the cross-sectional contour of the airflow groove is arc-shaped.

[0010] Furthermore, an annular limiting boss is provided on the inner bottom surface of the cigarette insertion cavity, and an opening connecting the cigarette inlet end and the air inlet channel is provided on the side wall of the annular limiting boss corresponding to each air inlet channel.

[0011] Furthermore, the heating element is arranged on the inner wall of the cigarette insertion cavity.

[0012] Furthermore, the heating element is arranged close to the closed end.

[0013] Furthermore, the heating element is attached and fixed to the inner wall of the cigarette insertion cavity and is divided into a plurality of independently heatable heating segments along the circumferential direction of its cross section.

[0014] Furthermore, the air inlet passage is arranged between two adjacent heating sections.

[0015] Furthermore, there are two heating sections, and the two heating sections are symmetrically distributed on one of the longitudinal sections where the axis of the cigarette insertion cavity is located.

[0016] Furthermore, a circuit board is also provided in the shell, and the electrodes of the heating element are electrically connected to the battery in the shell through a control board to control the heating sections to generate heat in sequence.

[0017] Furthermore, the cigarette insertion cavity is enclosed by a heating element bracket, a hollow tubular body and a heating element base that seals the bottom end of the hollow tubular body, which are sealed and connected. The top of the heating element bracket is sealed and connected to the cigarette insertion port of the outer shell, and the heating element is arranged in the hollow tubular body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The bottom of the cigarette insertion cavity is closed, and the air inlet channel is directly arranged in the cigarette insertion cavity. The condensate formed during the cigarette heating process and the dropped tobacco will be concentrated in the cigarette insertion cavity, and will not flow to other parts of the smoking device, making the smoking device easy to clean.

[0020] 2. The heating element is arranged on the inner periphery of the cigarette insertion cavity, and the air inlet passage passes through the high-temperature zone. Condensate can only be formed when the heating element finishes working and the temperature changes from high to low, so very little condensate is formed.

[0021] 3. When the cigarette is inserted or removed, it cleans the side wall of the cigarette insertion cavity, ensuring that there is no strong tobacco smell after the smoking device is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 An exploded view of the cigarette insertion cavity of the present invention;

[0024] Figure 3 A half-section schematic diagram of the insertion cavity of the cigarette holder;

[0025] Figure 4 This is an axial schematic diagram of the cigarette holder insertion cavity;

[0026] Figure 5 is a schematic diagram of gas flow;

[0027] Figure 6 A transverse cross-sectional schematic diagram of a cigarette after it has been inserted into the cigarette insertion cavity;

[0028] Figure 7 This is an axonometric view of the base of the heating element of the present invention;

[0029] Figure 8 This is a main cross-sectional view of the heating element base of the present invention

[0030] Fig. 9 It is a schematic diagram of the structure of the heating element after it is unfolded;

[0031] Fig.10 This is a structural schematic diagram of a heating element placed in a cigarette insertion cavity. 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] See also Figure 1 A low-temperature baking smoking device that takes in air from the side of a cigarette, comprises an outer shell 1 and a heating element 2, wherein a cigarette insertion cavity 3 is provided in the outer shell 1, wherein one end of the cigarette insertion cavity 3 is a cigarette insertion end, and the other end is a closed end, and the heating element 2 is attached and fixed to the inner wall of the cigarette insertion cavity 3, thereby heating the cigarette 4 inserted into the cigarette insertion cavity 3, and at least one airflow groove extending from the cigarette insertion end to the closed end is provided on the inner side wall of the cigarette insertion cavity 3, and the airflow groove and the side wall of the cigarette 4 inserted into the cigarette insertion cavity 3 are matched to form an air intake channel 5 that connects the external air with the cigarette intake end.

[0034] The air inlet end of the cigarette in the present invention usually refers to the other end opposite to the filter end of the cigarette. When the cigarette is heated and smoked, the user inhales from the filter, forming a negative pressure inside the cigarette, and the airflow enters the cigarette from the other end of the cigarette (i.e., the air inlet end of the cigarette), and then is inhaled into the mouth by the user. For a cigarette without a filter, the end into which the airflow enters when it is smoked is the air inlet end of the cigarette.

[0035] See also Figure 2 , Figure 3 and Figure 4To ensure uniformity of air intake, the air intake channels 5 are evenly arranged along the circumference of the cigarette insertion cavity 3. This embodiment is exemplified by two air intake channels. The cigarette 4 is composed of a tobacco segment and a filter segment. When the cigarette 4 is inserted into the cigarette insertion cavity 3, at least part of the filter segment is exposed from the housing 1. When the user inhales, he holds the filter segment and inhales. Under the action of the negative pressure of suction, the external air enters the cigarette 4 from the air intake end of the cigarette through the air intake channel 5, and brings 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.

[0036] In this embodiment, the bottom of the cigarette insertion cavity 3 is closed, and the air inlet channel 5 is directly arranged in the cigarette insertion cavity 3. The condensate formed during the heating process of the cigarette 4 and the dropped tobacco will be concentrated in the cigarette insertion cavity 3, 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 4 is inserted and removed, it has a cleaning effect on the inner wall of the cigarette insertion cavity, ensuring that there is no strong tobacco smell after the device is used.

[0037] In addition, even if a small amount of smoke flows back from the air inlet end of the cigarette into the cigarette insertion cavity 3, because the air inlet channel 5 passes through the high temperature zone, the backflowing smoke can only form condensate when the heating element 2 finishes working and the temperature changes from high to low, so very little condensate is formed.

[0038] In particular, by glazing the inner wall of the cigarette insertion cavity 3, since the surface of the cigarette insertion cavity 3 is smooth, 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 4.

[0039] It should be noted that, for those skilled in the art, the heating element 2 can also be directly set on the periphery of the cigarette insertion cavity 3, but compared with being directly set inside the cigarette insertion cavity 3, the heat generated by the heating element 2 needs to pass through the side wall of the cigarette insertion cavity 3 to be transmitted to the cigarette 4, and the heating efficiency will be relatively reduced; in addition, the heating method can also adopt the central heating method, but compared with the surrounding heating, the heating method in which the heating element 2 is directly inserted into the cigarette has the problem of tobacco sticking to the heating element 2 and needing to be cleaned.

[0040] To facilitate assembly and disassembly of components, in one embodiment, the housing 1 may be formed by buckling two half shells, and the housing 1 may be made of plastic, glass, ceramic or metal.

[0041] See also Figure 2-Figure 6In one embodiment, to ensure sufficient airflow, the air inlet channel 5 is arranged in parallel with the cigarette insertion cavity 3, that is, the air inlet channel 5 is parallel to the central axis of the cigarette insertion cavity 3, and the cross-sectional area of ​​the air inlet channel 5 is between 1.1-1.5 square millimeters, and its cross-sectional shape is preferably approximately circular or elliptical, but not limited thereto, as long as sufficient ventilation can be ensured. When the cross-sectional area is less than 1.1 square millimeters, there is insufficient air intake, resulting in an increase in the user's suction force, or even a situation where the user cannot inhale the cigarette; when the cross-sectional area is greater than 1.5 square millimeters, between two adjacent suction intervals, the user needs to ventilate, resulting in a decrease or disappearance of the suction negative pressure, and the smoke is easily reversed from the cigarette to the air inlet channel 5, resulting in an increase in condensate. In order to overcome this situation, a corresponding smoke backflow prevention device needs to be provided, and the cost of the smoking device is increased.

[0042] See also Figure 7 and Figure 8 The inner bottom surface of the cigarette insertion cavity 3 is provided with an annular limiting boss 6. When the cigarette 4 is inserted, the bottom end directly contacts the annular limiting boss 6 and is limited. To facilitate the passage of airflow, an opening 7 is provided on the side wall of the annular limiting boss 6 corresponding to each air inlet channel 5 to connect the cigarette inlet end and the air inlet channel 5. To minimize the airflow resistance, the cross-sectional area of ​​the opening 7 is designed to be greater than or equal to the cross-sectional area of ​​the airflow channel 5 and is smoothly connected to the airflow channel 5.

[0043] See also Figure 2 and Figure 3 In this embodiment, a specific structural form of the cigarette insertion cavity 3 is provided: it is enclosed by a heating element bracket 9, a hollow tubular body 10 and a heating element base 11 which seals the bottom end of the hollow tubular body 10 and is connected by a first sealing sleeve 8. The top end of the heating element bracket 9 is sealed and connected to the cigarette insertion port 13 of the outer shell 1 through a second sealing sleeve 12. The heating element 2 is only arranged in the hollow tubular body 10, thereby dividing the cigarette insertion cavity 3 into two parts: a heating cavity and a transition cavity. For the cigarette insertion cavity 3 with the above structure, even if smoke flows out to form a small amount of condensate, since the condensate generally gathers at the bottom of the cigarette insertion cavity 3, it is only necessary to replace or clean the hollow tubular body, and there is no need to replace or clean the entire smoking device, thereby reducing the maintenance cost of the smoking device.

[0044] In this embodiment, the heating chamber heats the cigarette, and the transition chamber has no heating function. When the cigarette 4 is inserted, the tobacco segment enters the heating chamber. When the smoke passes through the transition chamber from the cigarette 4, the transition chamber has no heating effect and can be effectively cooled. The length of the exposed part of the cigarette can be shortened, which can effectively prevent the cigarette 4 from being thrown out of the smoking utensil, thereby improving the anti-throwing performance of the cigarette 4.

[0045] See also Fig. 9 and Fig.10In one embodiment, the heating element 2 is divided into a plurality of independently heatable heating segments along the circumferential direction of the cross section of the hollow tubular body 10, and each heating segment is connected to a power source through an electrode to form a parallel control circuit, and the parallel control circuit is used to realize the independent heating of each heating segment in different regions. As for the specific structure of the control circuit, it is a conventional design in the field of electric control and will not be described in detail here.

[0046] The heating element 2 is divided into a plurality of zoned heating sections, and the heating sections are heated in sequence according to the zoned order, so that the cigarette 4 can be heated more fully, which is particularly suitable for thick cigarettes; after the cigarette 4 is inserted into the hollow tubular body 10, the plurality of heating sections heat the longitudinally equally divided parts of the cigarette 4 successively, so that the thick cigarette can be heated more fully from the outside to the inside, and the smoke-out time of the cigarette 4 is also extended, and the generation of harmful substances on the outer surface of the cigarette 4 in some areas due to long-term continuous heating is avoided, and the user experience is good.

[0047] See also Fig. 9 and Fig.10 In actual design, the heating element 2 is divided into two heating sections: a first heating section 201 and a second heating section 202. The first heating section 201 and the second heating section 202 are symmetrically distributed in one of the longitudinal sections where the axis of the hollow tubular body 10 is located, and have equal areas.

[0048] Fig.10 The figure shows a schematic diagram of the heating element 2 after being unfolded along the circumferential direction of the cross section, which can make a more intuitive analysis of the first heating segment 201 and the second heating segment 202. The ends of the first heating segment 201 and the second heating segment 202 are separately connected to a power source through electrodes to form two relatively independent heating circuits. The two heating circuits corresponding to the two heating segments are connected to the power source in parallel, so that the two heating segments can heat the left and right halves of the cigarette in sequence.

[0049] See also Fig. 9 In order to ensure the uniformity of air intake, the heating sections and the air intake passages 5 are alternately arranged on the hollow tubular body 10, that is, an air intake passage is arranged between any two adjacent heating sections.

[0050] See also Fig. 9 and Fig.10In order to improve the heating efficiency, the heating wires of the first heating section 201 and the second heating section 202 are distributed on the inner wall of the hollow tubular body 10 in a continuous bending direction along the circumferential direction of the hollow tubular body 10. Individual electrodes 14 are arranged at the two ends of the first heating section 201 and the second heating section 202 in series, and a common electrode 15 is arranged at the series connection point of the first heating section 201 and the second heating section 202. The individual electrode 14 and the common electrode 15 are connected to the circuit board 16 and the power supply 17 in the shell to form a parallel control circuit. In order to avoid the setting of electrodes affecting the insertion of cigarettes, the common electrode and the individual electrode are both arranged at the closed end of the cigarette insertion cavity. The battery 17 can be a nickel-hydrogen battery, a lithium-ion battery or a hydrogen battery. When a rechargeable battery is used, a USB charging interface 18 can also be arranged on the shell.

[0051] As for the attachment method of the heating element 2, conductive metal powder can be printed and attached to the inner surface of the hollow tubular body. During production, the composition ratio of the heating sheet is controlled, and a uniformly mixed metal or alloy powder is prepared and made into a resistor paste. Then, the resistor paste is printed on the hollow tubular body 10 according to a preset shape, and the electrode is passed through the heating element base 11 to form an electrode lead end. Finally, they are placed together in a high-temperature furnace for heating to form a heating element.

[0052] See also Figure 1 In order to prevent dust and other substances from entering the smoking device through the cigarette insertion port and contaminating the smoking device, an openable and closable dust cover 19 for shielding the cigarette insertion port 13 can also be provided on the housing.

[0053] See also Figure 1 In order to prevent heat from being transferred toward the shell 1, a heat insulating member 20 is provided between the shell 1 and the periphery of the cigarette insertion cavity 3, or air is directly used for heat insulation. When the heat insulating member 20 is used for heat insulation, the heat insulating member 20 can be made of, for example, a vacuum tube or heat insulating cotton. A vibration motor 21 for indicating the completion of heating can also be provided in the shell. When the set heating time or heating temperature is reached, the control circuit controls the vibration motor 21 to start, the shell vibrates, indicating that the heating is completed or the set temperature is reached, and the heating element stops working or keeps warm.

[0054] 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. A low-temperature baking smoking device with air intake from the side of a cigarette, comprising a housing provided with a cigarette insertion cavity and a heating element for heating the cigarette in the cigarette insertion cavity, wherein one end of the cigarette insertion cavity is a cigarette insertion end and the other end is a closed end, and is characterized in that: The inner wall of the cigarette insertion cavity is provided with at least one airflow groove extending from the cigarette insertion end to the closed end, and the airflow groove and the side wall of the cigarette inserted in the cigarette insertion cavity form an air intake channel connecting the external air with the cigarette intake end; The air inlet channel is arranged in parallel with the cigarette insertion cavity and its cross-sectional area is between 1.1-1.5 square millimeters; The heating element is arranged close to the closed end; The heating element is arranged on the inner wall of the cigarette insertion cavity; The cigarette insertion cavity is formed by a heating element bracket, a hollow tubular body and a heating element base that seals the bottom end of the hollow tubular body. The top end of the heating element bracket is sealed and connected to the cigarette insertion port of the shell, and the heating element is arranged in the hollow tubular body.

2. The low-temperature baking smoking utensil according to claim 1, characterized in that: The air inlet channels are evenly arranged along the circumferential direction of the cross section of the cigarette insertion cavity.

3. The low-temperature baking smoking utensil according to claim 1, characterized in that: An annular limiting boss is provided on the inner bottom surface of the cigarette insertion cavity, and an opening connecting the cigarette inlet end and the air inlet channel is provided on the side wall of the annular limiting boss corresponding to each air inlet channel.

4. The low-temperature baking smoking utensil according to claim 2 or 3, characterized in that: The heating element is attached and fixed on the inner wall of the cigarette insertion cavity and is divided into a plurality of independently heatable heating sections along the circumferential direction of its cross section.

5. The low-temperature baking smoking utensil according to claim 4, characterized in that: The air inlet passage is arranged between two adjacent heating sections.

6. The low-temperature baking smoking utensil according to claim 5, characterized in that: There are two heating sections, and the two heating sections are symmetrically distributed on one of the longitudinal sections where the axis of the cigarette insertion cavity is located.

7. The low-temperature baking smoking utensil according to claim 4, characterized in that: A circuit board is also provided in the shell, and the electrodes of the heating element are electrically connected to the battery in the shell through a control board, so as to control the heating sections to generate heat in sequence.

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