CN214677573U

CN214677573U - Heating cigarette smoking set with composite heat-conducting heating body

Info

Publication number: CN214677573U
Application number: CN202023162029.XU
Authority: CN
Inventors: 郭小义; 尹新强; 刘建福; 钟科军; 杜文; 刘金云; 李志红; 邢立立
Original assignee: China Tobacco Hunan Industrial Co Ltd
Current assignee: China Tobacco Hunan Industrial Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-11-12
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a heating cigarette smoking set with compound heat conduction heat-generating body, including the casing be equipped with power, heating element and PCB board in the casing, the power passes through PCB board control heating element carries out work, be formed with the ascending heating chamber of opening in the casing, be located in the casing the periphery in heating chamber still is equipped with thermal-insulated component, evenly distributed has a plurality of points form arch, adjacent two on the inside wall in heating chamber be formed with the recess between the point form arch, be equipped with heating element in the recess, smoking article insert to during in the heating chamber, smoking article's outer wall supports and leans on in the point form arch, and with there is the clearance between the heating element. The heating element of the smoking set is not in direct contact with the cigarette paper, so that the problem of excessive baking of the smoking product caused by direct contact is effectively avoided.

Description

Heating cigarette smoking set with composite heat-conducting heating body

Technical Field

The utility model belongs to the technical field of smoking articles for use, especially, relate to a heating cigarette smoking set with compound heat conduction heat-generating body.

Background

Compared with the traditional cigarette, the heating cigarette smoking device (the heating cigarette smoking set) directly heats smoking articles such as tobacco or nicotine, the heating temperature is between 220 ℃ and 250 ℃, the smoke is gradually volatilized after baking, and harmful smoke components generated by combustion and thermal degradation of the tobacco in the traditional cigarette can be reduced.

The heating methods involved in heating cigarettes include center heating, surrounding heating, and combined center and surrounding heating, each of which has advantages and disadvantages. In the prior art, the heating element in the 3 heating bodies is in direct contact with the smoking article, the cigarette paper of the smoking article receives heat transferred by the heating element at first, and the cigarette paper of the thin smoking article is easily over-baked, so that the cigarette paper volatilizes acidic substances, and the smoking taste is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a heating cigarette smoking set with compound heat conduction heat-generating body, the heating element and the cigarette paper of this smoking set are not direct contact, have effectively avoided the excessive problem of toasting of smoking article that direct contact brought.

In order to solve the technical problem, the utility model adopts the following technical scheme:

heating cigarette smoking set with compound heat conduction heat-generating body, including the casing be equipped with power, heating element and PCB board in the casing, the power passes through PCB board control heating element carries out work, be formed with the ascending heating chamber of opening in the casing, evenly distributed has a plurality of point form archs on the inside wall in heating chamber, adjacent two be formed with the recess between the point form arch, be equipped with heating element in the recess, smoking article insert to in the heating chamber, smoking article's outer wall support lean on the point form arch, and with there is the clearance between the heating element.

Specifically, an airflow channel communicated with the outside is formed between the groove and the smoking article, so that outside air can pass through the airflow channel and be heated in the groove to enter the smoking article under negative pressure.

Specifically, a plurality of the punctiform protrusions are distributed on the expansion surface of the inner side wall in a rectangular array;

the rectangular array comprises transverse columns and longitudinal columns, a transverse groove is formed between every two adjacent transverse columns, and a longitudinal groove is formed between every two adjacent longitudinal columns;

the heat generating element is disposed in the lateral groove or the longitudinal groove.

Specifically, a heat insulation element is further arranged on the periphery of the heating cavity in the shell.

Specifically, the longitudinal groove is parallel to the axial direction of the heating cavity, an airflow channel communicated with the outside is formed between the longitudinal groove and the smoking article, and outside air can enter the smoking article through the airflow channel.

Specifically, the heating element is disposed in each of the transverse grooves or the longitudinal grooves.

Specifically, the cross section of the point-shaped protrusion gradually increases toward the root.

Specifically, the top of casing be equipped with the mouth of inserting cigarette that the upward opening in heating chamber communicates, be equipped with on the casing can with insert the shield that the mouth of cigarette sheltered from or exposes.

Specifically, still be equipped with clean mouthful on the bottom face of casing, the inside of casing still is equipped with clean mouthful of through-type with clean passageway of the bottom direct intercommunication in heating chamber, be equipped with the bottom that can open and close on the clean mouthful, the axis of clean passageway with the axis coincidence in heating chamber.

Specifically, a temperature sensing resistor is arranged in the side wall of the heating cavity.

Specifically, the position of the top end of the heating cavity in the shell is further provided with a heat insulation gasket, and the heat insulation gasket is provided with an air inlet hole communicated with the cigarette inserting hole and the air flow channel.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in: the periphery that lies in the heating chamber in the smoking set is provided with thermal-insulated component, utilize the good thermal-insulated heat preservation performance function of thermal-insulated component, can effectively prevent the heat to casing direction diffusion, evenly distributed has a plurality of punctiform archs on the inside wall in heating chamber, be formed with the recess between two adjacent punctiform archs, be equipped with heating element in the recess, smoking article insert to the heating chamber in the time, smoking article's outer wall supports and leans on the punctiform arch, and there is the clearance between the heating element, make smoking article's cigarette paper and heating element not direct contact, excessive baking and the temperature inhomogeneity problem that the direct contact brought have been avoided, be used for the suction experience to feel good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a view of an external structure of a heated cigarette smoking set according to an embodiment of the present invention;

FIG. 2 is a top view of a heated cigarette smoking article according to an embodiment of the present invention;

FIG. 3 is a front cross-sectional view of a heated cigarette smoking article according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a heated cigarette smoking article according to an embodiment of the present invention;

fig. 5 is a heat flow diagram of a heating element according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a heating chamber according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a heating chamber according to an embodiment of the present invention;

fig. 8 is a flow chart of air flowing inside the heating chamber according to the embodiment of the present invention;

fig. 9 is an expanded schematic view of a heating chamber according to an embodiment of the present invention;

fig. 10 is a diagram illustrating a relative distribution of the heat generating elements and the dot-shaped protrusions according to an embodiment of the present invention;

wherein: 1-a shell; 2, inserting a cigarette port; 3-heating the cavity; 4-a smoking article; 5-a heating element; 6-a power supply; 7-an insulating element; 8-heat insulating spacer; 9-point-shaped bulges; 10-an airflow channel; 11-an air intake; 12-inserting a cigarette hole; 13-a transverse groove; 14-longitudinal grooves; 15-dust cover; 16-a PCB board; 17-control keys; 18-cleaning the mouth; 19-a vertical channel; 20-bottom cover; 21-temperature sensing resistor; 22-substrate piece one; 23-substrate sheet two; 24-electrode one; 25-electrode one; 26-electrode three.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, a heating cigarette smoking set with a composite heat-conducting heating body comprises a housing 1, a cigarette insertion opening 2 is arranged at the top of the housing 1, a heating cavity 3 with an upward opening is formed inside the housing 1, a smoking article 4 can be inserted into the heating cavity 3 from the cigarette insertion opening 2 and can be moved out from the cigarette insertion opening 2, a heating element 5 is arranged in the heating cavity 3, a power supply 6 for supplying power to the heating element 5 is further arranged in the housing 1, and the smoking article 4 can be inserted into the heating cavity 3 from the cigarette insertion opening 2 and heated by the heating element 5 to generate smoke for a user to smoke. After smoking is complete, the smoking article 4 may be pulled out of the mouthpiece 2. The heat insulation element 7 is arranged at the periphery of the heating cavity 3 in the shell 1, and the heat can be effectively prevented from being diffused towards the shell 1 by utilizing the excellent heat insulation performance of the heat insulation element 7.

Where smoking article 4 is a product that generates flavour from smoking material upon the application of heat, but does not cause combustion of the material. In this embodiment, the smoking article 4 is a low temperature cigarette, and includes a filter tip section and a smoking section wrapped by cigarette paper, and a tobacco material or a nicotine material is provided in the smoking section. It should be noted that the above is only one specific example of a smoking article 4, and it will be apparent to those skilled in the art that other smoking articles 4, such as cartridges, adapted for low temperature smoking set heating may also be used.

In this embodiment, the heat insulating element 7 is sleeved on the periphery of the heating chamber 3, the heat of the heating body can be blocked by the heat insulating element 7 and conducted to the smoking set shell, so as to play an important heat insulating protection role, the heat insulating element 7 is characterized by high heat resistance, theoretically, the heat conductivity coefficient can reach 0.013w/m & lt.k, so as to obtain good heat insulating effect, and glass fiber, asbestos, rock wool, silicate, aerogel felt or a vacuum plate and the like can be adopted.

Referring to fig. 3 to 6, specifically, a plurality of dot-shaped protrusions 9 are uniformly distributed on the inner side wall of the heating cavity 3, a groove is formed between two adjacent dot-shaped protrusions 9, the heating element 5 is arranged in the groove between the dot-shaped protrusions 9, the dot-shaped protrusions 9 and the heating element 5 jointly form a heating body, when the smoking article 4 is inserted into the heating cavity 3, the outer wall of the smoking article 4 abuts against the dot-shaped protrusions 9, and a gap is formed between the smoking article 4 and the heating element 5, so that the smoking article 4 and the heating element 5 are not in contact with each other; during smoking, the smoking article 4 is inserted into the heating cavity 3, and the heating element 5 generates heat to bake the smoking article 4 out of smoke for a user to smoke.

In practical applications, the power source 6 may be a lithium ion battery, a nickel hydrogen battery, a hydrogen gas battery, or the like, a charging port and a control button 17 may be further disposed on the housing 1, the power source 6 may be charged through the charging port, and the on/off of the power source 6 of the heating element 5 may be controlled through the control button 17. The housing 1 is used to realize the appearance and protect the internal arrangement, and a plastic housing may be used.

Referring to fig. 5-8, in some possible embodiments, the cross-sectional size of the dot-shaped protrusion 9 gradually increases toward the root, the area of the contact portion with the smoking article 4 is extremely small, an air flow channel 10 communicated with the outside is formed between the groove and the smoking article 4, and the air flow channel 10 extends from one end of the heating cavity 3 to the other end of the heating cavity 3.

Referring to fig. 7 and 8, in the present embodiment, after the heating element 5 is powered on, the generated heat rapidly heats the dot-shaped protrusion 9 on the surface of the heating cavity 3, and simultaneously, the cold air remaining between the dot-shaped protrusion 9 and the dot-shaped protrusion 9 is also rapidly heated, a part of the heat generated by the heating element 5 is conducted to the dot-shaped protrusion 9 and the cold air, and another part of the heat is transferred to the smoking article 4, and the heat applied to the smoking article 4 is simultaneously from the conduction heat of the dot-shaped protrusion 9 and the convection heat transfer of the hot air, and most of the heat is from the heat conduction and radiation heat transfer of the heating element 5. When the cigarette is sucked, cold air is heated to become hot air, the hot air enters the low-temperature cigarette and enters the oral cavity from the filter tip, and the contact area between the spot-shaped bulge 9 and the low-temperature cigarette is small due to the small area, so that the heat borne by the low-temperature cigarette is mainly air convection heat transfer and radiation heat transfer of the groove, and the low-temperature cigarette is heated more uniformly.

Referring to fig. 6, in practical application, in addition, a heat insulating spacer 8 may be further disposed in the housing 1 at a position located at the top end of the heating cavity 3, the heat insulating spacer 8 is disposed to further hinder heat from being conducted to the smoke insertion opening 2 and the housing 1, an air inlet hole 11 and a smoke insertion hole 12 are disposed on the heat insulating spacer 8 and are communicated with the air flow channel 10, air entering from the smoke insertion opening 2 may enter the air flow channel 10 through the air inlet hole 11 and finally enter the smoking article 4 from the bottom end of the smoking article 4, and the smoking article 4 may be inserted into the heating cavity 3 through the heat insulating spacer 8 from the smoke insertion opening 2.

Referring to fig. 9 and 10, it can be understood that in practical design, the plurality of spot-like protrusions 9 are distributed in a rectangular array on the development surface of the inner side wall, the rectangular array comprises a transverse row and a longitudinal row, each of the transverse row and the longitudinal row comprises a plurality of spot-like protrusions 9 uniformly spaced, a transverse groove 13 is formed between two adjacent transverse rows, a longitudinal groove 14 is formed between two adjacent longitudinal rows, the heating element 5 is arranged in the transverse groove 13 perpendicular to the axial direction of the heating cavity 3, and the airflow channel 10 is formed between the longitudinal groove 14 and the smoking article 4. Of course, it is also possible to arrange the heating element 5 in the longitudinal groove 14. Furthermore, to provide uniform heating of the smoking article 4, a heating element 5 is provided in each transverse groove 13.

Referring to fig. 3 and 4, in the embodiment, when a low-temperature cigarette is inserted into the heating cavity 3, the outer wall of the low-temperature cigarette, i.e. the cigarette paper, is tightly attached to the point-shaped protrusions 9 on the heating cavity 3, the longitudinal grooves 14 formed by the point-shaped protrusions 9 and the point-shaped protrusions 9 form the air flow channel 10 with the low-temperature cigarette, the heating element 5 penetrates through the transverse grooves 13 of the point-shaped protrusions 9, and gaps are reserved between the transverse grooves 13 and the longitudinal grooves 14 and the cigarette paper, so that the heating element 5 is indirectly contacted with the cigarette paper. When the heating element 5 starts to heat, the point-shaped bulges 9 are heated and then transfer heat to the low-temperature cigarettes, the heat is also radiated to the low-temperature cigarettes, and meanwhile, air positioned between the grooves is heated and changed into hot air. When smoking cigarettes, cold air is changed into hot air after passing through the airflow channel 10 formed by the groove and the low-temperature cigarettes, the hot air and the heat flow in the airflow channel 10 which exists before enter the low-temperature cigarettes together, the low-temperature cigarettes volatilize smoke after being heated, and the hot air and the smoke are mixed and pass through the filter tip to enter the oral cavity of a human body.

Specifically, the heating element 5 is a component capable of heating after being connected with electricity, and is characterized by small sheet resistance, fast heating, high use temperature and strong oxidation resistance, and common manufacturing materials are metal materials such as tungsten, silver and platinum. The present embodiment directly constitutes the heating element 5 by printing or coating the resistive tracks at the grooves, covered with a protective glaze (not shown in the figures). By the design mode, the resistance circuit can be prevented from being directly exposed in an oxidation environment to cause oxidation failure of the resistance circuit, and the service life of the heating element 5 is prolonged. Of course, the heating element 5 may also be a heating wire or a heating sheet.

Referring to fig. 1 and 2, in some possible embodiments, a dust cover 15 is disposed on the housing 1, and the dust cover 15 can slide from one end of the smoking set to the other end through a slide rail; when using the smoking set, can slide open dust cover 15 and expose and insert mouth 2, smoking article 4 can insert in heating chamber 3 from inserting mouth 2, and when the suction finished, can slide on dust cover 15 and cover inserting mouth 2, prevent that foreign matter such as dust from falling into heating chamber 3.

Referring to fig. 4, specifically, a PCB 16 is further disposed in the casing 1, the PCB 16 is electrically connected to the power supply 6 and the heating element 5 to form a heating control circuit, the control button 17 is electrically connected (or connected to other types of signals) to the PCB 16, and when a user controls the smoking set to be turned on or off through the control button 17, the PCB 16 receives and sends out signals to complete corresponding indication.

Referring to fig. 3, in some possible embodiments, a cleaning port 18 is further provided on the bottom end surface of the housing 1, a vertical passage 19 for communicating the cleaning port 18 with the bottom end of the heating chamber 3 is further provided inside the housing 1, an openable and closable bottom cover 20 is provided on the cleaning port 18, the bottom cover 20 is made of high temperature resistant plastic, the axis of the vertical passage 19 coincides with the axis of the heating chamber 3, and in use, the cleaning port 18 is opened only when the smoking set needs cleaning, and is closed by the bottom cover 20 in other time periods. By the design mode, residues such as tobacco falling in the smoking process can automatically enter the vertical channel 19 under the action of gravity, the residues can be taken out only by opening the bottom cover 20, and the smoking set is very convenient to clean. In addition, when the heating cavity 3, the cigarette inserting opening 2 and the smoking article 4 are concentrically arranged, the smoothness of heat and air flow can be ensured.

It should be noted that, in some embodiments, a temperature sensing resistor 21 is embedded in the side wall of the heating chamber 3, and the temperature of the heating element 5 is measured and fed back by using the temperature-resistance principle. The temperature sensing resistor 21 is a sensitive element, and needs to be made of a metal material with a relatively large TCR coefficient, and is typically characterized by being sensitive to temperature and exhibiting different resistance values at different temperatures. Nickel, nickel alloy, platinum alloy, copper alloy, and the like are preferable.

Referring to fig. 10, specifically, the tube wall of the heating cavity 3 includes a first substrate sheet 22 and a second substrate sheet 23 which are stacked, the temperature sensing resistor 21 is sandwiched between the first substrate sheet 22 and the second substrate sheet 23, dot-shaped protrusions 9 are distributed on the inner surface of the second substrate sheet 23, the protrusions of the dot-shaped protrusions 9 contact with the cigarette, and the substrate sheet may be made of alumina, glass, metal foil, or other materials.

The manufacturing process of the heating element (alumina substrate) is as follows: printing or coating a temperature-sensitive resistor 21 on the alumina casting blank to form a temperature-sensitive resistor layer for measuring the temperature of the heating element 5, and printing or coating the heating element 5 on the alumina casting blank to form a heating layer for heating; the heating element 5 is covered with the dot-shaped projections 9 to form a projection layer, and the projection layer can be formed by roll pressing or the like. The temperature-sensitive resistor 21, the heat-generating layer and the bump layer are integrated by hot-press lamination or isostatic lamination. After molding, degumming, co-sintering, glazing and bonding wires, a heating element assembly can be formed.

The manufacturing process of the heating element (metal substrate) comprises the following steps: printing or coating a temperature-sensitive resistor 21 on a first substrate sheet 22 to form a temperature-sensitive resistor layer for measuring the temperature of the heating element 5; printing a heating element 5 after printing or coating an insulating layer on the temperature-sensitive resistance layer to form a heating layer for heating; the heating element 5 is covered with the dot-shaped projections 9 to form a projection layer, and the projection layer can be formed by roll pressing or the like. The heating element assembly can be formed after air drying, degumming, sintering, glazing and welding wires.

Referring to fig. 10, the second substrate 23 is provided with the heating element 5 and the dot-shaped protrusions 9, the heating element 5 is disposed in the gap between the dot-shaped protrusions 9 and the dot-shaped protrusions 9, and the heating element 5 is provided with the first electrode 24, the second electrode 25 and the third electrode 26, and shares one electrode with the temperature-sensing resistor 21. When the heating element 5 works, the heat heats the point-shaped bulges 9 and the air remained in the grooves, and simultaneously conducts the heat to the low-temperature cigarettes.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. Heating cigarette smoking set with compound heat conduction heat-generating body, including the casing be equipped with power, heating element and PCB board in the casing, the power passes through PCB board control heating element carries out work, be formed with the ascending heating chamber of opening in the casing, its characterized in that: the heating cavity is characterized in that a plurality of point-shaped bulges are uniformly distributed on the inner side wall of the heating cavity, a groove is formed between every two adjacent point-shaped bulges, the heating element is positioned in the groove, and when a smoking article is inserted into the heating cavity, the outer wall of the smoking article abuts against the point-shaped bulges and a gap is formed between the smoking article and the heating element.

2. The heated cigarette smoking article of claim 1, wherein: an airflow channel communicated with the outside is formed between the groove and the smoking article, so that outside air can pass through the airflow channel and be heated in the groove to enter the smoking article under negative pressure.

3. The heated cigarette smoking article of claim 2, wherein: the plurality of point-shaped bulges are distributed on the unfolded surface of the inner side wall in a rectangular array;

the heating element is arranged in the transverse groove or the longitudinal groove, and the longitudinal groove is parallel to the axial direction of the heating cavity.

4. The heated cigarette smoking article of claim 1, wherein: and a heat insulation element is also arranged at the periphery of the heating cavity in the shell.

5. The heated cigarette smoking article of claim 3, wherein: the heating element is arranged in each transverse groove or each longitudinal groove.

6. The heated cigarette smoking article of claim 1, wherein: the cross section of the point-shaped bulge is gradually increased towards the root.

7. The heated cigarette smoking article of claim 1, wherein: and a temperature sensing resistor is arranged in the side wall of the heating cavity.

8. The heated cigarette smoking article of claim 2 or 3, wherein: the top of casing be equipped with the mouth of inserting of the opening intercommunication that makes progress of heating chamber, be equipped with on the casing can with insert the shield that the mouth of cigarette sheltered from or exposes.

9. The heated cigarette smoking article of claim 8, wherein: still be equipped with clean mouthful on the bottom face of casing, the inside of casing still be equipped with clean mouthful with the vertical passageway of the bottom direct intercommunication in heating chamber, be equipped with the bottom that can open and close on the clean mouthful.

10. The heated cigarette smoking article of claim 8, wherein: the top position department that is located in the casing heating chamber still is equipped with thermal-insulated gasket, be equipped with the intercommunication on the thermal-insulated gasket insert the cigarette mouth with airflow channel's inlet port.