CN210275914U

CN210275914U - Heat insulation assembly and low-temperature smoking set

Info

Publication number: CN210275914U
Application number: CN201920970697.3U
Authority: CN
Inventors: 刘建福; 钟科军; 郭小义; 黄炜; 尹新强; 易建华; 邢立立
Original assignee: China Tobacco Hunan Industrial Co Ltd
Current assignee: China Tobacco Hunan Industrial Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-10
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a heat insulation assembly, including heat-conducting plate, phase transition heat pipe and graphite flake, the heat-conducting plate has relative first side and second side, the graphite flake laminating is in on the first side, be equipped with the installation passageway on the heat-conducting plate, be equipped with in the installation passageway and run through the louvre of second side, phase transition heat pipe matches and installs in the installation passageway. The utility model also discloses a low temperature smoking set of adopting above-mentioned thermal-insulated subassembly. This application is through setting up the thermal-insulated subassembly of special construction between heat-generating body and power supply subassembly for the heat that finally transmits to the power supply subassembly becomes very little, avoids its place regional high temperature, has guaranteed the stability in use of power supply subassembly.

Description

Heat insulation assembly and low-temperature smoking set

Technical Field

The utility model belongs to the technical field of smoking articles for use, especially, relate to a thermal-insulated subassembly and low temperature smoking set.

Background

Compared with the traditional cigarette, the heating non-combustion smoking device directly heats the tobacco or nicotine product at the temperature of 220-250 ℃, and the smoke gradually volatilizes after baking, thereby reducing harmful smoke components generated by combustion and thermal degradation of the tobacco in the traditional cigarette.

The heating of the incombustible product can be divided into surrounding heating and center heating in form, and various heating techniques such as ceramic heating, film heating, electromagnetic heating and the like have been developed based on the electric heating principle. In the practical application process, because the heating temperature (220-.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that a thermal-insulated subassembly that can guide the heat to the transmission of settlement direction is provided.

The utility model aims to solve the second technical problem that a low temperature smoking set that can effectively prevent the heat and transmit to power supply unit is provided.

In order to solve the first technical problem, the following technical scheme is adopted in the application:

the utility model provides a heat insulation assembly, includes heat-conducting plate, phase transition heat pipe and graphite flake, the heat-conducting plate has relative first side and second side, the graphite flake laminating is in on the first side, be equipped with the installation passageway on the heat-conducting plate, be equipped with in the installation passageway and run through the louvre of second side, the phase transition heat pipe match install in the installation passageway.

In the scheme, the second side surface of the heat conducting plate is a heated surface, and when heat passes through the heat insulation assembly from the second side surface of the heat conducting plate, the phase change heat pipe and the heat conducting plate absorb heat, wherein one part of the heat absorbed by the phase change heat pipe is transferred to the heat conducting plate, and the other part of the heat is transferred to the end part of the heat conducting plate and is radiated from the end part; a part of the heat received by the heat-conducting plate is transferred to the layered graphite sheet, and the other part is transferred to and radiated from the outer edge thereof; the heat that the heat-conducting plate transmitted is finally obstructed to the stratiform graphite piece, carries the heat of receiving along the lamellar structure extending direction of stratiform graphite piece, finally reaches the purpose that the guide heat distributes to setting for the direction.

Furthermore, a clamping groove extending along the long edge direction of the first side face is formed in the first side face in an inwards concave mode, and the clamping groove forms the installation channel.

Furthermore, the phase change heat pipe comprises a closed pipe body and a capillary structure layer tightly attached to the inner wall of the pipe body, and phase change liquid is stored in the capillary structure layer.

Further, the heat conducting plate is stacked with multiple layers of graphite sheets.

Further, the graphite sheet covers the first side surface.

In order to solve the second technical problem, the following technical solutions are adopted in the present application:

the utility model provides a low temperature smoking set, includes shell, heat-generating body and power supply subassembly, the power supply subassembly does the heat-generating body power supply, including battery and PCB board, still including setting up be located in the shell the heat-generating body with above-mentioned thermal-insulated subassembly between the power supply subassembly, first side towards the power supply subassembly, the second side towards the heat-generating body.

Further, a heating cavity for loading tobacco products is formed in the housing, and the heating body is configured to heat the tobacco products in the heating cavity;

the shell is provided with an air inlet and a smoke inserting port which are communicated with two opening ends of the heating cavity respectively, the air inlet, the heating cavity and the smoke inserting port are communicated in sequence to form a straight-through type flue, and the extending direction of the phase change heat pipe is parallel to the axis of the straight-through type flue.

Further, the heat insulation assembly divides the shell into a first cavity and a second cavity, the heating cavity and the heating body are located in the first cavity, and the power supply assembly is located in the second cavity.

Furthermore, the shell is also provided with a dustproof cover which can shield the cigarette inserting port.

Further, the heating body is a tubular heating body, and the inner cavity of the tubular heating body forms the heating cavity.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in:

1. a heat insulation component is arranged between the heating body and the power supply component, the heat insulation component comprises a heat conduction plate, a phase change heat pipe and a graphite sheet, the phase change heat pipe is arranged at the position of the heat conduction plate close to the heating body, the graphite flake is arranged between the heat conducting plate and the power supply component, and the close contact state between the heat conducting plate and the graphite flake is ensured, so that the heat diffused from the heating body can be greatly absorbed by the phase-change heat pipe and the heat conducting plate, one part of the absorbed heat is radiated from the two ends of the low-temperature smoking set, the other part of the absorbed heat is transferred to the graphite flake, and after the heat is transferred to the graphite flake, due to the special structure of the graphite sheet, the heat flows to the two ends of the low-temperature smoking set finally along the layered structure of the graphite sheet, the heat finally transferred to the power supply assembly is extremely less, the temperature of the area where the power supply assembly is located is prevented from being too high, and the use stability of the power supply assembly is guaranteed.

2. The two ends of the heating cavity are provided with openings, one opening end is an air inlet end, the other opening end is a tobacco product insertion end, an air inlet communicated with the air inlet end and a tobacco insertion opening communicated with the tobacco product insertion end are respectively arranged on the shell, and the air inlet, the heating cavity and the tobacco insertion opening are sequentially communicated to form a straight-through flue; the heat transferred to the end parts of the layered graphite sheet, the heat conducting plate and the phase-change heat pipe is intensively transferred to the air inlet and the smoke inserting port of the low-temperature smoking set to be dissipated, so that the temperature of the side part of the outer shell of the whole low-temperature smoking set can be maintained in a lower range.

3. After external air flow enters the heating cavity from the air inlet, smoke generated by heating the tobacco products is brought into a user mouth from the cigarette inserting port, and air supply and suction are carried out; in the process of smoking of a user, when external cold airflow passes through the air inlet and the smoke inserting port, a heat exchange process exists, so that heat which is intensively transferred to the smoke inserting port and the air inlet of the smoking set is transferred to the airflow and is quickly brought out of the smoking set, and the overhigh temperature of the end part of the smoking set can be effectively prevented; in addition, when the air current passes through air inlet department, the heat that transfers from thermal-insulated subassembly tip can preheat the air current, the energy saving.

Drawings

FIG. 1 is an isometric view of a prior smoking article;

fig. 2 is a main sectional view of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is an exploded view of the thermal insulation assembly of the present invention;

FIG. 5 is a schematic view of the inner layered structure and heat conduction of the graphite sheet according to the present invention;

FIG. 6 is a schematic view of the internal heat flow of the graphite sheet according to the present invention;

fig. 7 is a schematic view of a medium phase variable heat pipe structure of the present invention;

fig. 8 is a schematic view of the heat flow inside the phase change heat pipe of the present invention;

FIG. 9 is a liquid-vapor circulation diagram of the interior of a phase change heat pipe according to the present invention;

fig. 10 is a general view of heat flow and vapor-liquid circulation in the phase change heat pipe of the present invention.

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.

Fig. 1 shows an axial view of a conventional low-temperature smoking set, which includes a housing 1, a heating element 4 and a power supply assembly for supplying power to the heating element 4 are disposed inside the housing 1, a tobacco product is inserted into the smoking set through a cigarette insertion opening 2 to be heated, so as to generate smoke for a user to smoke, and the heating manner of the heating element 4 can adopt various heating technologies such as ceramic heating, film heating, electromagnetic heating, etc.

For preventing materials such as dust from polluting the smoking set in inserting the mouth of a cigarette 2 entering smoking set, be equipped with shield 3 inserting mouth of a cigarette 2 department, can shelter from inserting mouth of a cigarette 2 or open, when opening shield 3, insert mouth of a cigarette 2 and expose, can insert the use from inserting mouth of a cigarette 2 with low temperature cigarette, when closing shield 3, can prevent to insert mouth of a cigarette 2 department and fall into the dust. The low temperature smoking set is defined herein as having one end inserted into the mouth 2 and the other end opposite thereto, which are the two ends of the low temperature smoking set as described hereinafter.

When the smoking set is used, because the heating temperature of the heating body 4 of the low-temperature smoking set is relatively high, generally within the range of 220 plus 250 ℃, when the smoking set works, the heat generated by the heating body 4 can be diffused to the power supply assembly, so that the temperature of the power supply assembly is too high, and the working stability of the power supply assembly is influenced. The present application is directed to solving this problem by providing a low temperature smoking set having a specially configured heat insulation assembly.

Referring to fig. 2-3, the low temperature smoking set of the present application comprises a housing 1, a heating element 4, a power supply assembly and a heat insulation assembly, wherein a heating chamber 5 for loading and heating tobacco products is formed in the housing 1, the heating element 4 is configured to heat the tobacco products in the heating chamber 5 to generate smoke for a user to smoke, and the heat insulation assembly is arranged in the housing 1 between the heating element 4 and the power supply assembly and is used for preventing heat emitted by the heating element 4 from being transferred to the power supply assembly.

Referring to fig. 2, in an embodiment, the power supply assembly comprises a battery 6 and a PCB 7, the battery 6 and the PCB 7 are electrically connected, and the PCB 7 and the heat-generating body 4 are electrically connected, so that the battery 6 supplies power to the heat-generating body 4 through the PCB 7, and the heat-generating body 4 is electrified to generate heat to heat tobacco material in the tobacco product to generate smoke for a user to smoke. The shell 1 can be further provided with a key 8, and the key 8 is electrically connected (or connected with other types of signals) with the PCB 7 to control the starting and closing of the low-temperature smoking set.

Aiming at different positions of the heating body 4 relative to the heating cavity 5 in different heating modes, when the smoking set adopts a central mode for heating, the heating body 4 is arranged in the heating cavity 5; when heating is performed by the surrounding heating method, the heating element 4 is provided on the inner periphery or outer periphery of the heating chamber 5. In this embodiment, the heating element 4 is a tubular heating element 4, and the inner cavity of the heating element 4 directly forms a heating chamber 5 for surrounding heating.

The tubular heating body 4 can include the heat conduction body and adhere to the peripheral piece that generates heat at the heat conduction body, and the heat that generates heat piece circular telegram and produce passes through the heat conduction body and transmits to tobacco products, and is preferred, and the heat conduction body can adopt ceramic material preparation, utilizes the high coefficient of heat conductivity of ceramic material, improves the efficiency of heat transfer, reduces the energy consumption.

It can be understood that the heating sheet can also be arranged on the inner periphery of the heat conduction pipe body, the heating body 4 with the structure can directly transfer heat to the tobacco material without passing through the side wall of the heat conduction pipe body, so that the heating efficiency is higher, but the heating sheet directly faces to the tobacco material, so that tar and other substances are easily attached.

In practical application, the heating sheet can be further arranged into a plurality of heating sections with independent heating functions along the circumferential direction of the cross section of the heat conduction pipe body; therefore, the condition that the same part of the tobacco product is burnt after being heated for a long time is avoided by heating the tobacco product in different sections, the use taste of a user is enhanced, the effective utilization rate of the tobacco product is improved, and the waste is reduced. Of course, the heating element 4 may be a rod-like or sheet-like heating element 4, and heating may be centered on the heating method.

Referring to fig. 4, specifically, the heat insulation assembly includes a heat conduction plate 9, a phase change heat pipe 10 and a graphite sheet 11, the heat conduction plate 9 has a first side and a second side opposite to each other, wherein the first side faces the power supply assembly, the second side faces the heating element 4, the graphite sheet 11 is attached to the first side, and the phase change heat pipe 10 is attached to the heat conduction plate 9 at a position close to the heating chamber 5.

In this embodiment, by providing the heat insulating member between the heat generating body 4 and the power supply member, the heat insulating member includes the heat conducting plate 9, the phase change heat pipe 10 and the graphite sheet 11, the phase change heat pipe 10 is disposed at a position of the heat conducting plate 9 close to the heat generating body 4, the graphite sheet 11 is disposed at a position between the heat conducting plate 9 and the power supply member, and it is ensured that the heat conducting plate 9 and the graphite sheet 11 are kept in close contact with each other, so that the heat diffused from the heat generating body 4 can be greatly absorbed by the phase change heat pipe 10 and the heat conducting plate 9, and a part of the absorbed heat is dissipated from both ends of the low temperature smoking set, and the other part is transferred to the graphite sheet 11, after the heat is transferred to the graphite sheet 11, due to the special structure inside the graphite sheet 11, most of the heat is transferred to the edge, the heat finally transferred to the power supply assembly is extremely less, the temperature of the area where the power supply assembly is located is prevented from being too high, and the use stability of the power supply assembly is guaranteed.

As for the thickness and the area size of the heat conducting plate 9 and the graphite sheet 11, those skilled in the art can select the heat conducting plate according to the actual heat insulation requirement, and in order to ensure the reliability of heat insulation, the graphite sheet 11 should be designed to cover the heat conducting plate 9 as a whole and cover the power supply assembly as a whole.

In practice, the tobacco product may be a cigarette or cartridge or the like, and the heating chamber 5 is constructed and arranged to removably receive a cigarette or cartridge, that is, a cigarette or cartridge may be inserted into the heating chamber 5 by a user and removed from the heating chamber 5 by the user after use.

For effectively reducing the temperature of smog, improve and inhale and experience the sense, can also add the condensation segment between the cigarette material section of cigarette and filter tip section, the condensation segment can be designed into the expansion condensation structure.

It can be understood that when the tobacco product adopts a cartridge, the suction nozzle structure is required to be arranged at the cigarette insertion port 2, but the smoking set with the structure needs to be detached from the shell 1 to load the cartridge, and the operation is not very convenient.

Referring to fig. 4, in an embodiment of the low temperature smoking set of this embodiment, the heat conducting plate 9 is provided with a mounting channel 12 extending along a long side direction (along two ends of the smoking set), the phase-change heat pipe 10 is installed in the mounting channel 12 in a matching manner, the mounting channel 12 is provided with a plurality of heat dissipation holes penetrating through the second side surface, so as to further guide heat to the phase-change heat pipe 10, and in order to ensure reliability of heat transfer, the phase-change heat pipe 10 is preferably kept in close contact with a side wall of the mounting channel.

Specifically, the concave draw-in groove that is formed with in the middle part of the first side of heat-conducting plate 9, this draw-in groove directly constitutes above-mentioned installation passageway 12, the size of this draw-in groove and the appearance size phase-change heat pipe 10 phase-match for phase-change heat pipe 10 can be fixed in the draw-in groove, and simultaneously, the louvre directly sets up in the bottom of draw-in groove and runs through heat-conducting plate 9, as for the specific quantity and the size of louvre and draw-in groove, technical staff in the art can carry out the adaptability according to the heat.

Graphite flake 11, heat-conducting plate 9 and phase transition heat pipe 10 three form a thermal-insulated subassembly in this embodiment, separate between fine heat-generating body 4 and the PCB board 7, form the heat separation, can be very big avoid the high temperature that heat-generating body 4 during operation produced to influence the stability in use's of PCB board 7 problem.

Of course, the installation channel 12 can also be directly arranged inside the heat conducting plate 9, and the installation channel 12 with the structure is relatively inconvenient to process because the heat conducting plate is generally designed to be thinner. In addition, the second side surface of the heat conducting plate 9 can be provided with clamping grooves for mounting the phase change heat pipe 10, and especially, when the clamping grooves on the two sides of the heat conducting plate 9 are designed to be distributed in a staggered mode, the thickness of the heat conducting plate 9 can be effectively reduced, and heat conduction is facilitated.

The principles of graphite sheet thermal insulation are explained in detail below in conjunction with the atomic structure of the interior of the graphite sheet:

referring to fig. 5, each graphite sheet 11 is a laminated structure as shown in the figure, that is, the bonding force between carbon atoms on each layer is very strong, the bonding density is very high, and is much higher than the bonding force and the bonding density between carbon atoms on each layer, so that, when external heat is to pass through the laminated graphite sheet 11, as shown in the figure, the heat is blocked by heat diffusion in the space between two adjacent layers much weaker than the blocking by layer-by-layer penetration of each laminated structure, so that the heat is dissipated along the extending direction of the laminated structure, and finally most of the heat is transmitted to the edge position of the laminated graphite sheet 11, and the heat penetrating through the laminated graphite is a very small part by layer-by-layer blocking.

Fig. 6 is a schematic diagram of heat dissipation of the layered graphite sheet 11 when applied in a low temperature smoking set, as shown in the figure, when heat diffuses onto the layered graphite sheet 11, first a part of the heat moves under the barrier of the graphite sheet 11 directly towards the edge of the graphite sheet 11, another part enters into the inside of the layered graphite sheet 11 (entering layer by layer), along the special structure inside the layered graphite sheet 11, further moves towards the edge of the graphite sheet 11, that is, the heat which can finally penetrate the layered graphite sheet 11 completely is very little, under the superposition of the multi-layer graphite sheet 11, the heat which can penetrate is further reduced, finally, a good heat insulation effect in the horizontal penetration direction is achieved, most of the heat is transferred to the two ends of the low temperature smoking set through the graphite sheet 11, and the temperature at the PCB board 7 is prevented from being too high.

It is understood that, in order to improve the heat insulation performance, a plurality of graphite sheets 11 can be stacked on the heat conducting plate 9, and heat insulation material (such as aerogel, vacuum tube, etc.) can be further provided around the heating chamber 5, so that the heat can be prevented from being transferred to the housing 1 by the excellent heat insulation performance of the heat insulation material.

The working principle of the phase change heat pipe will be described in detail below with reference to the specific structure of the heat pipe:

referring to fig. 7, it is conceivable that the phase-change heat pipe 10 includes a sealed pipe body 101 and a capillary structure layer 102 disposed adjacent to an inner wall of the pipe body, and the capillary structure layer 102 stores a phase-change liquid 103 therein. The phase-change heat pipe 10 is divided into an evaporation section (evaporation zone), a convection section (convection zone) and a condensation section (condensation zone) which are connected in sequence, wherein the evaporation section faces the heating cavity 5, and the condensation section is tightly attached to the heat conducting plate 9. The phase change liquid is adsorbed by the capillary structure layer, and when the external temperature changes slightly, the phase change liquid is attached to the capillary structure layer; when the external temperature rises, the temperature inside the phase change heat pipe 10 is higher and higher until the phase change liquid inside the phase change heat pipe vaporizes to form steam, the steam flows to a region with low pressure, namely a condensation section, under the action of air pressure, and is liquefied to form the phase change liquid in the region with low pressure, and the phase change liquid flows to a region with steam generation, namely an evaporation section, to form a circulation, so that a large amount of heat is absorbed and released in the process, and a heat conduction component with excellent effect is formed.

Fig. 8 is the heat flow schematic diagram in the phase change heat pipe 10 of the low temperature smoking set inside during operation, as shown in the figure, when the local of the phase change heat pipe 10 is heated, its heated portion has heat to spread into, and the heat that spreads into the phase change heat pipe 10 is along with the inside liquid-vapor conversion of phase change heat pipe 10, is conveyed to the position that the phase change heat pipe 10 is not heated to along with the vapour-liquid conversion from phase change heat pipe 109 diffusion away, form a route that the heat gived off.

Fig. 9 is a schematic diagram of vapor-liquid circulation in a phase-change heat pipe 10 in the low-temperature smoking set during operation, as shown in fig. 8, when a part of the phase-change heat pipe is heated, heat is transferred to the heated part, and the liquid in the part of the phase-change heat pipe is heated and converted into vapor, where the region is an evaporation region (the leftmost section in the orientation shown in fig. 9), the pressure of the evaporation region is increased due to the generation of the vapor, the vapor is pushed to other regions to flow, the region through which the vapor flows is a convection region (the middle section in the orientation shown in fig. 9), the vapor finally reaches another region (the rightmost section in the orientation shown in fig. 9) of the phase-change heat pipe after passing through the convection region, the region is a condensation region, and the temperature of the vapor in the phase-change heat pipe is reduced after. As the liquid in the evaporation zone is changed into steam, negative pressure is formed at the capillary structure of the zone, the liquid in the capillary structure of the adjacent zone is sucked to the evaporation zone, and finally, a steam flow path from the evaporation zone to the convection zone and then to the condensation zone and a liquid flow path from the condensation zone to the convection zone and then to the evaporation zone are formed, so that a closed circulation is formed.

Fig. 10 is a schematic diagram of vapor-liquid circulation and heat flow in the phase-change heat pipe 10 in the low-temperature smoking set of the present invention, as shown in the figure, after heat enters the phase-change heat pipe, the liquid at the corresponding portion is vaporized to form vapor, the pressure in the evaporation region increases, the vapor flows to the low-pressure region, and reaches the condensation region with the lowest temperature through the convection region, and is condensed back to the liquid in the condensation region, and the carried heat is released from the condensation region; the liquid in the capillary structure of the evaporation area is reduced to form negative pressure, so that the liquid in the convection area and the liquid in the condensation area flow to the evaporation area to form liquid-vapor circulation, and the phase-change heat pipe can rapidly transfer heat in a required mode and direction in the circulation process.

Therefore, by arranging the phase-change heat pipe 10 on the heat conducting plate 9, a part of heat dissipated outside the heating element 4 can be quickly guided and transferred to the heat conducting plate 9 and the graphite sheet 11, and the other part is guided to two ends of the phase-change heat pipe 10 and finally dissipated from two ends of the smoking set through the excellent heat transfer function of the phase-change heat pipe 10.

In the actual design, because of the different heat production of smoking set with different structures, the person skilled in the art can artificially control the boiling point and the condensation point to meet the heat transfer requirement of smoking set by adjusting the specific proportion of each substance component forming the phase change liquid.

Of course, the heat pipe without the capillary structure layer can be applied in the utility model, and the heat pipe can be selected according to the actual situation.

Referring to fig. 2, in one embodiment, the inner cavity of the smoking set housing 1 of the present embodiment is divided into a first chamber and a second chamber by a heat insulation assembly, the heating element 4 is installed in the first chamber, and the battery 6 and the PCB board 7 are installed in the second chamber. The heat conducting plate 9 is fixedly arranged in the shell 1, the heat conducting plate 9 is positioned between the PCB 7 and the heating body 4, the graphite sheet 11 is arranged on the heat conducting plate 9, the graphite sheet 11 is positioned between the heat conducting plate 9 and the PCB 7, and the graphite sheet 11 is tightly attached to the heat conducting plate 9, the graphite sheet 11, the heat conducting plate 9 and the phase change heat pipe 10 form a heat insulation component, the heat conducting plate 9 can be made of materials with high heat conductivity coefficient such as aluminum alloy or copper alloy, when the heating body 4 works normally, the generated heat diffuses to the periphery, the heat flowing to the direction of the PCB 7 and the direction of the battery 6 is blocked by the heat insulation component, the problem that the use stability is influenced by overhigh temperature of the PCB 7 and the battery 6 is greatly avoided, after the heat insulation component receives the heat diffused by the heating body 4, the heat is radiated from the two ends of the low-temperature smoking set, the purpose of protecting the PCB 7 and the battery 6 is well achieved.

Referring to fig. 2, in an embodiment, the heating cavity 5 of the smoking set of the present embodiment is provided with two open ends, one of the open ends is an air inlet end, the other open end is a tobacco insertion end, an air inlet 13 communicated with the air inlet end is provided on the housing 1, the tobacco insertion port 2 on the housing 1 is communicated with the tobacco insertion end, the air inlet 13, the heating cavity 5 and the tobacco insertion port 2 are sequentially communicated to form a through-type flue, two ends of the heat insulation component extend to the tobacco insertion port 2 and the air inlet 13, and the extending direction of the installation channel 12 is parallel to the axis of the through-type flue.

The heating cavity 5 of the low-temperature smoking set of the embodiment has two openings, one of which is an air inlet and the other is an insertion end of tobacco products, the housing 1 is respectively provided with an air inlet 13 communicated with the air inlet and a tobacco insertion opening 2 communicated with the insertion end of tobacco products, and the air inlet 13, the heating cavity 5 and the tobacco insertion opening 2 are sequentially communicated to form a straight-through flue; the heat transferred to the end parts of the layered graphite sheet 11, the heat conducting plate 9 and the phase-change heat pipe 10 is intensively transferred to the air inlet 13 and the smoke inserting port 2 of the low-temperature smoking set to be dissipated, so that the temperature of the side part of the outer shell 1 of the low-temperature smoking set can be maintained in a lower interval.

In addition, after the external air flow enters the heating cavity 5 from the air inlet 13, the smoke generated by heating the tobacco products is brought into the mouth of the user from the cigarette inserting port 2 for air supply and suction; in the process of smoking of a user, when external cold airflow passes through the air inlet 13 and the smoke inserting port 2, a heat exchange process exists, so that heat intensively transferred to the smoke inserting port 2 and the air inlet 13 of the smoking set is transferred to the airflow and is quickly brought out of the smoking set, and the temperature of the end part of the smoking set can be effectively prevented from being too high; meanwhile, when the air flow passes through the air inlet 13, the heat transferred from the end part of the heat insulation assembly can preheat the air flow, so that the energy is saved.

It should be explained here that, in the low-temperature smoking set of the above-mentioned structure, in addition to the heat transfer from the heat insulating assembly toward the axial direction side of the heating chamber 5, a part of the heat is transferred from the side of the heat insulating assembly perpendicular to the axial direction of the heating chamber 5 to the low-temperature smoking set housing 1, and for the purpose of directionally guiding the heat transfer toward the axial direction of the heating chamber 5, a heat insulating layer 14 (not shown in the drawings) may be provided on the side wall of the heat conducting plate 9 and the graphite sheet 11 perpendicular to the axial direction of the heating chamber 5, and the heat transfer from the side is prevented by the heat insulating layer, so that the heat transferred from the heat insulating assembly is substantially entirely guided and transferred to both ends of the smoking. Specifically, the thermal isolation layer 14 may be made of a thermal insulation material such as heat insulation cotton.

Referring to fig. 2, in an embodiment, a cleaning cover 15 may be further provided at the air inlet 13 for opening or closing the air inlet 13, so that the flue may be conveniently cleaned; in addition, a tar adsorption piece (not shown in the figure) with a microporous structure can be further arranged at the air inlet 13, tar and other substances in the direct-flow type flue are adsorbed by tar adsorption, the cleanness of the flue is favorably kept, but the tar adsorption piece needs to ensure that air flow can enter the heating cavity 5 from the air inlet 13 in sequence, and the material of the tar adsorption piece is selected according to actual adsorption requirements by human eyes in the field.

Referring to fig. 2, in an embodiment, a vibration prompting motor 16 is further disposed in the housing 1, and is controlled by the PCB board 7, and when the user controls the on/off of the low-temperature smoking set through the button 8, the PCB board 7 sends a signal to the vibration prompting motor to operate to generate vibration to prompt the user that the corresponding operation is started. The vibration indication motor is disposed right below the battery 6, but not limited thereto, and a specific position of the vibration indication motor may be selectively arranged according to a specific distribution of other components in the housing 1.

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. Thermal-insulated subassembly, its characterized in that: including heat-conducting plate, phase transition heat pipe and graphite flake, the heat-conducting plate has relative first side and second side, the graphite flake laminating is in on the first side, be equipped with the installation passageway on the heat-conducting plate, be equipped with in the installation passageway and run through the louvre of second side, the phase transition heat pipe match is installed in the installation passageway.

2. The insulation assembly of claim 1, wherein: the first side face is inwards concave to form a clamping groove extending along the long edge direction of the first side face, and the clamping groove forms the installation channel.

3. The insulation assembly of claim 1, wherein: the phase change heat pipe comprises a closed pipe body and a capillary structure layer tightly attached to the inner wall of the pipe body, and phase change liquid is stored in the capillary structure layer.

4. The insulation assembly of claim 1, wherein: the heat conducting plate is overlapped with a plurality of layers of graphite sheets.

5. The insulation assembly of claim 1, wherein: the graphite sheet covers the first side.

6. Low temperature smoking set, including shell, heat-generating body and power supply subassembly, the power supply subassembly does the heat-generating body power supply, including battery and PCB board, its characterized in that: the heat insulating assembly of any one of claims 1 to 5 disposed in the case between the heat generating body and the power supply assembly, the first side facing the power supply assembly, the second side facing the heat generating body.

7. The low temperature smoking article of claim 6, wherein: a heating cavity for loading tobacco products is formed in the housing, and the heating body is configured to heat the tobacco products in the heating cavity;

8. The low temperature smoking article of claim 7, wherein: the heat insulation assembly separates the shell into a first cavity and a second cavity, the heating cavity and the heating body are located in the first cavity, and the power supply assembly is located in the second cavity.

9. The low temperature smoking article of claim 7, wherein: the shell is also provided with a dustproof cover which can shield the cigarette inserting port.

10. The low temperature smoking article of claim 7, wherein: the heating body is a tubular heating body, and the inner cavity of the tubular heating body forms the heating cavity.