CN112369685A

CN112369685A - Smoke extractor

Info

Publication number: CN112369685A
Application number: CN202010395871.3A
Authority: CN
Inventors: 李丹; 刘磊; 陈义坤; 洪俊杰; 刘冰
Original assignee: China Tobacco Hubei Industrial LLC
Current assignee: China Tobacco Hubei Industrial LLC
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-02-19

Abstract

The invention discloses a smoking device, which comprises a heater and a power supply, wherein the heater is connected with the power supply through a control device, the control device comprises an electronic circuit for controlling power transmitted to the heater, and when the control device detects that the resistance value of the heater is increased in a transition manner, the control device reduces or stops the power transmission to the heater. The invention can realize accurate temperature control of the heater according to the temperature feedback function, and has high heating efficiency and good heating effect.

Description

Smoke extractor

Technical Field

The invention belongs to the technical field of heating and non-combustion, and particularly relates to a smoking device.

Background

The basic principle behind the need for a smoking device to meet the needs of cigarette consumers seeking lower harmful substance intake is that a specially manufactured smoking article has a smoking segment that can be heated to produce smoke and that such a segment need only reach temperatures much lower than ignition and combustion to emit satisfactory smoke results, including smoke volume, flavor and inlet temperature, which consumers typically feedback on the consumer experience of the smoking device.

The core of a smoking device is heat generation and control, and the heater used often directly affects the performance of this core, which in turn affects the consumer experience. However, although the existing heaters are various in variety, they usually do not have a temperature feedback function, which results in that precise temperature control cannot be performed, heating efficiency is low, service life is short, and economical efficiency is poor.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a smoking device which can realize accurate temperature control of a heater according to a temperature feedback function, is high in heating efficiency and has a good heating effect.

In order to solve the technical problems, the invention adopts the following technical scheme: a smoking device comprising a heater and a power supply, the heater and the power supply being connected by control means, the control means comprising an electronic circuit for controlling the power delivered to the heater, wherein the control means reduces or stops the delivery of power to the heater when the control means detects a sudden increase in the resistance of the heater.

In a specific embodiment, the heater comprises a hollow tubular conductive substrate, the interior of the conductive substrate is used for accommodating a smoking segment of a tobacco product, a heating layer used for heating the smoking segment of the tobacco product after being electrified is arranged on the inner surface and/or the outer surface of the conductive substrate, a plurality of electric contacts used for connecting the power supply are arranged on the conductive substrate and/or the heating layer, and the resistance value of the conductive substrate is larger than that of the heating layer; wherein when the temperature of the conductive base body is increased to the Curie temperature or higher, the resistance value of the conductive base body is increased in a transition manner.

In a specific embodiment, when the temperature of the conductive substrate is below the curie temperature, the resistance value of the conductive substrate increases slowly with the increase of the temperature.

In a particular embodiment, the curie temperature of the electrically conductive substrate is the operating temperature of the smoking segment of the tobacco article.

In one embodiment, the conductive substrate has a Curie temperature of 200 to 400 degrees Celsius.

In one embodiment, the resistance of the conductive substrate increases by more than a factor of 10 after a temperature above the curie point.

In a specific embodiment, the resistance value of the heating layer is linearly increased along with the temperature increase between normal temperature and 400 ℃, and the resistance value of the heating layer is 0.1-2 ohms.

In a specific embodiment, the temperature coefficient of resistance of the electrically conductive base is greater than the temperature coefficient of resistance of the heating layer.

In a specific embodiment, a difference between the room temperature resistance value of the conductive substrate and the room temperature resistance value of the heating layer is greater than or equal to 5 ohms.

In a particular embodiment, the heating layer comprises one or more electrically conductive strips.

In a specific embodiment, when the number of the conductive strips is plural, the plural conductive strips are stacked together to form the heating layer in series or in parallel.

In one embodiment, the conductive strip is made of one or more metals or alloys of manganese, tungsten, gold, silver, copper, aluminum, platinum, iron, nickel, and chromium.

In a specific embodiment, the conductive matrix is made of one or more materials selected from silicon oxide, aluminum oxide, strontium titanate, barium zirconate, silicon carbide, silicon nitride, aluminum nitride, barium titanate, iron oxide, manganese oxide, zinc oxide, and rare earth elements.

In a specific embodiment, the outer surface of the heating layer is coated with a first inert layer for preventing oxidation of the heating layer.

In a particular embodiment, the outer and/or inner surface of the conductive base is provided with a second inert layer for preventing oxidation of the conductive base.

In a specific embodiment, the first inert layer and the second inert layer are made of glass.

In one embodiment, the electrical contacts are made of one or more metals selected from gold, silver, aluminum, copper, and nickel.

In one embodiment, the number of electrical contacts is two.

In a specific embodiment, the outer diameter of the conductive substrate is 3-15 mm, the length of the conductive substrate is 3-80 mm, and the wall thickness of the conductive substrate is 0.5-5 mm.

In a specific embodiment, the control means reduces or stops the power transmission to the heater when the control means detects a sudden decrease in the current value or a sudden increase in the voltage value of the heater or the conductive base.

In one embodiment, when the temperature of the conductive substrate is reduced below the curie temperature and the control device detects a sudden increase in the current value or a sudden decrease in the voltage value of the heater or the conductive substrate, the control device increases or initiates the delivery of power to the heater.

In one embodiment, the temperature of the conductive substrate decreases below the curie temperature, and the control device increases or initiates power delivery to the heater when the control device detects a sudden decrease in the resistance value of the conductive substrate.

In a specific embodiment, the heater, the power supply and the control device are all arranged in a shell, and an insulating arrangement is formed between the inner wall of the shell and the outside of the heater.

In a specific embodiment, a thermal insulation portion is provided between an inner wall of the housing and an outside of the heater.

Compared with the prior art, the invention has the beneficial effects that:

1. the smoking device comprises the heater and the control device, wherein the control device can directly or indirectly detect the resistance value of the heater or the resistance value of the conductive substrate, timely obtain a signal that the tobacco product is heated or needs to be heated, and accurately control the heating temperature of the heater according to the related signal, so that the accuracy is high, the controllability is strong, and the heating efficiency and the heating effect of the heater can be improved.

2. The heater comprises the conductive substrate and the heating layer, when the temperature of the conductive substrate rises above the Curie temperature, the resistance value of the conductive substrate is increased in a transition mode, so that the conductive substrate can be used as a temperature detector to feed back the heating effect of the heater in time, the accurate temperature control of the heater can be achieved, the heating efficiency is high, and the heating effect is good.

3. When the heating layer of the heater comprises the plurality of conductive strips, the heating area can be increased, and the heating effect is further improved.

4. The outer surface of the heating layer of the heater is coated with the first inert layer, so that the oxidation of the heating layer can be prevented, the heating effect can be improved, and the service life of the heater can be prolonged.

5. The inner surface and/or the outer surface of the conductive substrate of the heater are/is coated with the second inert layer, so that the conductive substrate can be prevented from being oxidized, the heating effect can be improved, and the service life of the heater can be further prolonged.

6. The wall thickness of the conductive substrate is 0.5-5 mm, the rigidity of the heater can be maintained, and the rigidity is favorable for fixing and clamping the heater.

7. The smoking device can directly or indirectly detect the current value or the voltage value of the heater or the conductive substrate, and timely obtain the signal that the tobacco product is heated or needs to be heated, and has wide application range and good flexibility.

8. The heater and the smoking device have the advantages of simple structure, convenient use and wide market prospect.

Drawings

Figure 1 shows a schematic structural view of one particular embodiment of the smoking device of the present invention;

FIG. 2 is a schematic structural diagram illustrating the appearance of one embodiment of the heater of the present invention;

FIG. 3 shows a schematic cross-sectional view of one embodiment of the heater of the present invention;

fig. 4 shows a schematic structural view of a heater layer arranged on the outer surface of the conductive base body of one embodiment of the heater of the present invention.

Wherein, 1-a heater; 11-a conductive matrix; 12-a heating layer; 13-an electrical contact; 14-a first inert layer; 121-a conductive strip; 2-a power supply; 3-a control device; 4-a smoking article smoking segment; 5-a shell.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

As shown in fig. 1, the smoking device of the present invention includes a heater 1 and a power supply 2, the heater 1 and the power supply 2 are connected through a control device 3, and the power supply 2 supplies power to the heater 1 through the control device 3. The control means 3 comprises an electronic circuit for controlling the power delivered to the heater 1, enabling the power regulation of the heater 1 according to the detection feedback to the heater 1. Wherein, when the control means 3 detects a sudden increase in the resistance of the heater 1, the control means 3 obtains a first signal that the tobacco product (the term "tobacco product" referring to a tobacco material containing article, in the present invention specifically a consumable tobacco material containing article matched to a smoking device) has been heated (to a smoking temperature) and reduces or stops the power transmission to the heater 1 in dependence on the first signal. This is because the transient increase in the resistance value of the heater 1 is directly related to the curie temperature of the heater 1, and when the curie temperature of the heater 1 is set to the operating temperature (smoking temperature) of the tobacco product, the control device 3, which directly or indirectly detects the resistance value of the heater 1, can promptly obtain the first signal that the heating of the tobacco product is completed. Like this, heater 1 can in time feed back as temperature detector to heater 1's heating effect to can realize heater 1's accurate accuse temperature, heating efficiency is high, and heats effectually.

Preferably, when the control device 3 detects a transient increase in the resistance value of the heater 1, the time for reducing or stopping the power transmission to the heater 1 may be appropriately delayed.

In a particular embodiment, as shown in figures 2 to 4, the heater 1 comprises a hollow tubular electrically conductive substrate 11, the interior of the electrically conductive substrate 11 being for receiving a smoking segment 4 of a tobacco product (as shown in figure 1, the term "smoking segment of a tobacco product" relates to a smoking segment of a tobacco product above which contains a substance that releases tobacco-flavoured smoke upon heating). The inner and/or outer surface of the conductive substrate 11 is provided with a heating layer 12 for heating the smoking segment 4 of the tobacco product after being energized. The conductive base 11 and/or the heating layer 12 are provided with a plurality of electric contacts 13 for connecting with an external power supply 2, and the electric contacts 13 form a conductive path capable of controlling voltage or current with the heating layer 12 and the conductive base 11 respectively by communicating with the power supply. Wherein the resistance value of the conductive base 11 is larger than that of the heating layer 12. When the temperature of the conductive substrate 11 is below the curie temperature, the resistance value of the conductive substrate 11 increases gradually with the increase of the temperature (the change of the resistance value of the conductive substrate 11 with the temperature is gentle), and when the temperature of the conductive substrate 11 increases to above the curie temperature, the resistance value of the conductive substrate 11 increases in a transition manner. So that the conductive base 11 can be used as a temperature detector to feed back the heating effect of the heater 1 in time. When in use, after the electric contact 13 is connected with the power supply 2, the conductive substrate 11 and the heating layer 12 heat the tobacco products together. When the conductive substrate 11 is energized, a certain amount of heat is generated, and the part of the heat is marked as heat A. Heating layer 12 also generates heat, labeled heat B, when energized. Since the resistance value of the conductive substrate 11 is greater than that of the heating layer 12, and when the temperature of the conductive substrate 11 is below the curie temperature, the resistance value of the conductive substrate 11 increases slowly with the increase of the temperature, and when the temperature of the conductive substrate 11 increases above the curie temperature, the resistance value of the conductive substrate 11 increases in a transitional manner, resulting in that the heat a is much smaller than the heat B, the heat B generated by the heating layer 12 is a main factor for heating the tobacco product.

In a particular embodiment, the curie temperature of the electrically conductive substrate 11 is the operating temperature of the smoking segment 4 of the tobacco product.

In one embodiment, the conductive substrate 11 has a Curie temperature of 200-400 degrees Celsius.

In one specific embodiment, the resistance of the conductive substrate 11 increases by more than a factor of 10 after being above the curie point temperature.

In one specific embodiment, the resistance of the heater layer 12 increases linearly with increasing temperature between ambient temperature and 400 ℃.

In one embodiment, the resistance of the heating layer 12 is 0.1-2 ohms.

In a particular embodiment, the temperature coefficient of resistivity of the conductive base 11 is greater than the temperature coefficient of resistivity of the heating layer 12.

In a specific embodiment, the difference between the room temperature resistance value of the conductive base 11 and the room temperature resistance value of the heating layer 12 is greater than or equal to 5 ohms.

In a preferred embodiment, the room temperature resistance of the heating layer 12 is 0.7 ohm, and the room temperature resistance of the conductive substrate 11 is 7 ohm.

In a particular embodiment, the cross-section of the conductive base 11 is arranged to be circular.

In a particular embodiment, the conductive substrate 11 has a larger tip inner diameter than a base inner diameter, and the conductive substrate 11 has a base inner diameter that is smaller than the outer diameter of the smoking segment 4 of the smoking article. In this way, not only is insertion of the tobacco product smoking segment 4 within the electrically conductive base body 11 facilitated, but heating efficiency can be improved.

In a particular embodiment, the heater layer 12 includes one or more electrically conductive strips 121.

In a specific embodiment, when the number of the conductive strips 121 is plural, the heating layer 12 is formed by stacking a plurality of conductive strips 121 in series or in parallel, so that the heating area can be increased, and the heating effect can be further improved. For example, when the number of the conductive strips 121 is plural, the conductive strips include a first conductive strip, a second conductive strip, and a third conductive strip. Different conductive strips 121 can be made of different materials or the same material. A plurality of conductive strips 121 may be stacked on top of each other to achieve a composite electrical performance. For example, a first conductive strip may be partially superimposed on top of or below other conductive strips, with heating layers 12 formed in series or parallel between different conductive strips 121.

In a specific embodiment, the conductive strips 121 are provided as a conductive film having a thickness and shape, and the material forming the conductive strips 121 may be attached to the conductive substrate 11 by a printed circuit method or other plating method.

In a specific embodiment, the conductive strip 121 is made of one or more metals or alloys of manganese, tungsten, gold, silver, copper, aluminum, platinum, iron, nickel, and chromium.

In a specific embodiment, the conductive substrate 11 is made of one or more materials selected from silicon oxide, aluminum oxide, strontium titanate, barium zirconate, silicon carbide, silicon nitride, aluminum nitride, barium titanate, iron oxide, manganese oxide, zinc oxide, and rare earth elements.

In a particular embodiment, the outer surface of the heating layer 12 is coated with a first inert layer 14 for preventing oxidation of the heating layer 12. The first inert layer 14 is capable of protecting the heating layer 12 from oxidation.

In a specific embodiment, the outer surface and/or the inner surface of the conductive base 11 is provided with a second inert layer for preventing oxidation of the conductive base 11. Specifically, the conductive substrate 11 may be made of a metal oxide resistant to air oxidation, and although the rate of oxidation of the conductive substrate 11 by air is slower than that of the heating layer 12, a second inert layer for preventing oxidation of the conductive substrate 11 may be provided on the outer surface and/or the inner surface of the conductive substrate 11 in view of convenient and rapid manufacturing processes to protect the outer surface and/or the inner surface of the conductive substrate 11.

In a preferred embodiment, the heating layer 12 is disposed on the outer surface of the conductive base 11. The first inert layer 14 is sleeved on the common outer part of the conductive base body 11 and the heating layer 12, so that the conductive base body 11 and the heating layer 12 can be prevented from being oxidized, and the conductive base body 11 and the heating layer 12 are protected.

In a preferred embodiment, the thickness of the first inert layer 14 is greater than the thickness of the heating layer 12, which is effective in preventing oxidation.

In one particular embodiment, the first inert layer 14 and the second inert layer are both made of glass. Wherein the first inert layer 14 and the second inert layer can be attached to the surfaces of the heating layer 12 and the conductive substrate 11 by evaporation, sputtering, spraying, coating or covering, respectively.

In a specific embodiment, the electrical contacts 13 are made of one or more metals selected from gold, silver, aluminum, copper, and nickel.

In a specific embodiment, the electrical contacts 13 are soldered to the wires.

In a preferred embodiment, the number of electrical contacts 13 is two.

In one embodiment, the conductive substrate 11 has an outer diameter of 3 to 15 mm. The length of the conductive substrate 11 is 3-80 mm. The wall thickness of the conductive substrate 11 is 0.5-5 mm, and the rigidity of the heater can be maintained, and the rigidity is favorable for fixing and clamping the heater 1.

In a particular embodiment, when the control means 3 detects a sudden decrease in the current value or a sudden increase in the voltage value of the heater 1 or the conductive substrate 11, the control means 3 obtains a first signal that the tobacco product is heated (to the smoking temperature) and reduces or stops the power transmission to the heater 1 in response to the first signal. Like this, electrically conductive base member 11 can carry out timely feedback as temperature detector to the heating effect of heater 1 to can realize the accurate accuse temperature of heater 1, heating efficiency is high, and heating effect is good.

Preferably, when the control device 3 detects a sudden decrease in the current value or a sudden increase in the voltage value of the heater 1 or the conductive base 11, the time for reducing or stopping the power transmission to the heater 1 may be appropriately delayed.

In a particular embodiment, when the temperature of the conductive substrate 11 decreases below the curie temperature and the control device 3 detects a sudden increase in the current value or a sudden decrease in the voltage value of the heater 1 or the conductive substrate 11, the control device 3 obtains a second signal indicating that the tobacco product needs to be heated and increases or restarts the power transmission to the heater 1 in response to the second signal. Such repetition of the process may be performed as the case may be during operation of the smoking device. Like this, electrically conductive base member 11 can carry out timely feedback as temperature detector to the heating effect of heater 1 to can realize the accurate accuse temperature of heater 1, heating efficiency is high, and heating effect is good.

In a particular embodiment, when the temperature of the conductive substrate 11 falls below the curie temperature and the control means 3 detects a sudden decrease in the resistance of the conductive substrate 11, the control means 3 receives a second signal indicating that the tobacco product needs to be heated and increases or restarts the power transmission to the heater 1 in response to the second signal. Such repetition of the process may be performed as the case may be during operation of the smoking device. Like this, electrically conductive base member 11 can carry out timely feedback as temperature detector to the heating effect of heater 1 to can realize the accurate accuse temperature of heater 1, heating efficiency is high, and heating effect is good.

In one particular embodiment, as shown in FIG. 1, the heater 1, the power source 2 and the control device 3 are all disposed within a housing 5. The inner wall of the shell 5 and the outside of the heater 1 are arranged in a heat insulation way.

In a particular embodiment, insulation is provided between the inner wall of the housing 5 and the outside of the heater 1.

In a particular embodiment, the thermal insulation comprises a heat resistant material and/or a high infrared reflective material.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A smoking device comprising a heater (1) and a power source (2), the heater (1) and the power source (2) being connected by a control device (3), the control device (3) comprising an electronic circuit for controlling the power delivered to the heater (1),

wherein the control device (3) reduces or stops the power transmission to the heater (1) when the control device (3) detects a transient increase in the resistance value of the heater (1).

2. A smoking device according to claim 1, wherein the heater (1) comprises a hollow tubular conductive substrate (11), the interior of the conductive substrate (11) is used for accommodating a smoking segment (4) of a tobacco product, a heating layer (12) for heating the smoking segment (4) of the tobacco product after being electrified is arranged on the inner surface and/or the outer surface of the conductive substrate (11), a plurality of electric contacts (13) for connecting the power supply (2) are arranged on the conductive substrate (11) and/or the heating layer (12), and the resistance value of the conductive substrate (11) is larger than that of the heating layer (12);

wherein when the temperature of the conductive base (11) is increased to a Curie temperature or higher, the resistance value of the conductive base (11) is increased in a transition manner.

3. A smoking device according to claim 2, wherein the resistance of the electrically conductive substrate (11) increases slowly with increasing temperature when the temperature of the electrically conductive substrate (11) is below the curie temperature.

4. A smoking device according to claim 2, wherein the curie temperature of the electrically conductive substrate (11) is the operating temperature of the smoking segment (4) of the smoking article.

5. A smoking device according to claim 2, wherein the conductive substrate (11) has a curie temperature of 200-400 degrees celsius.

6. A smoking device according to claim 2, wherein the resistance of the electrically conductive substrate (11) increases by more than a factor of 10 after a temperature above the curie point.

7. The smoking device according to claim 2, wherein the resistance value of the heating layer (12) increases linearly with temperature increase between normal temperature and 400 ℃, and the resistance value of the heating layer (12) is 0.1-2 ohm.

8. A smoking device according to claim 2, wherein the temperature coefficient of resistance of the electrically conductive substrate (11) is greater than the temperature coefficient of resistance of the heating layer (12).

9. A smoking device according to claim 2, wherein the difference between the room temperature resistance value of the electrically conductive substrate (11) and the room temperature resistance value of the heating layer (12) is greater than or equal to 5 ohms.

10. A smoking device according to claim 2, wherein the heating layer (12) comprises one or more electrically conductive strips (121).

11. A smoking device according to claim 10, wherein when the number of the electrically conductive strips (121) is plural, the plural electrically conductive strips (121) are laminated together to form the heating layer (12) in series or in parallel.

12. A smoking device according to claim 10, wherein the electrically conductive strip (121) is made of one or more metals or alloys of manganese, tungsten, gold, silver, copper, aluminium, platinum, iron, nickel and chromium.

13. A smoking device according to claim 2, wherein the electrically conductive substrate (11) is made of one or more of silicon oxide, aluminium oxide, strontium titanate, barium zirconate, silicon carbide, silicon nitride, aluminium nitride, barium titanate, iron oxide, manganese oxide, zinc oxide and rare earth elements.

14. A smoking device according to claim 2, wherein the outer surface of the heating layer (12) is coated with a first inert layer (14) for preventing oxidation of the heating layer (12).

15. A smoking device according to claim 14, wherein the outer and/or inner surface of the electrically conductive substrate (11) is provided with a second inert layer for preventing oxidation of the electrically conductive substrate (11).

16. A smoking device according to claim 15, wherein the first inert layer (14) and the second inert layer are both made of glass.

17. A smoking device according to claim 2, wherein the electrical contacts (13) are made of one or more metals selected from gold, silver, aluminium, copper and nickel.

18. A smoking device according to claim 2, wherein the number of electrical contacts (13) is two.

19. A smoking device according to claim 2, wherein the outer diameter of the conductive base (11) is 3-15 mm, the length of the conductive base (11) is 3-80 mm, and the wall thickness of the conductive base (11) is 0.5-5 mm.

20. A smoking device according to claim 2, wherein the control means (3) reduces or stops the power transmission to the heater (1) when the control means (3) detects a sudden decrease in the current value or a sudden increase in the voltage value of the heater (1) or the electrically conductive substrate (11).

21. A smoking device according to claim 2, wherein the temperature of the electrically conductive substrate (11) falls below the curie temperature, and the control means (3) increases or initiates the power transmission to the heater (1) when the control means (3) detects a sudden increase in the current value or a sudden decrease in the voltage value of the heater (1) or the electrically conductive substrate (11).

22. A smoking device according to claim 2, wherein the temperature of the electrically conductive substrate (11) falls below the curie temperature, and the control means (3) increases or initiates power transmission to the heater (1) when the control means (3) detects a sudden decrease in the resistance of the electrically conductive substrate (11).

23. A smoking device according to claim 2, wherein the heater (1), the power source (2) and the control means (3) are all disposed within a housing (5), the housing (5) being thermally insulated from the exterior of the heater (1) by an inner wall thereof.

24. A smoking device according to claim 23, wherein insulation is provided between the inner wall of the housing (5) and the outside of the heater (1).