CN219068401U - Heating device and electronic cigarette - Google Patents

Abstract

The utility model provides a heating device and electron cigarette, heating device includes rigid substrate, zone of heating and thermal-sensitive temperature control layer, and rigid substrate, zone of heating and thermal-sensitive temperature control layer are tubular structure, and the zone of heating sets up in the outer wall of rigid substrate, and thermal-sensitive temperature control layer sets up in the outer wall of zone of heating and contacts with the surface of zone of heating, and thermal-sensitive temperature control layer is used for controlling the zone of heating and keeps in preset temperature range. By arranging the heating device in a tubular structure, the heating layer is fully covered on the rigid substrate in a circumferential manner, so that heat loss can be reduced, heating efficiency can be improved, energy consumption can be reduced, heating time can be greatly shortened, heat utilization rate is high, heating temperature uniformity can be ensured, temperature uniformity of each part on the rigid substrate is ensured, and the problem that the upper end temperature and the lower end temperature of the rigid substrate are greatly different is avoided; in addition, the outer wall of the heating layer is provided with a thermosensitive temperature control layer, so that the structure is simple, the temperature of the heating layer can be monitored in real time, the accurate temperature control is performed, and the good heating effect is ensured.

Description

Heating device and electronic cigarette

Technical Field

The utility model relates to the technical field of electronic cigarettes, in particular to a heating device and an electronic cigarette.

Background

The heating non-combustion device generally adopts a specific heating plate or a heating needle as a heating mode to heat to 200-300 ℃, and the tobacco material and the atomizing agent release aerosol of nicotine, smoke and other fragrant components in a low-temperature non-combustion state, so that the aerosol is sucked by a user, and a large amount of harmful substances are reduced. The environmental temperature of the tobacco material is far lower than that of the traditional cigarette, and the tobacco material has no open fire or ash in the smoking process, thus being an environment-friendly smoking mode.

At present, heating elements in a heating non-combustion device are usually in a sheet type and needle type structure, and are prepared into the heating elements through a thick film printing process or a heating wire mode, however, certain defects exist in the heating elements, particularly in the aspect of heating, the problems of low heating efficiency, uneven heating, incapability of accurately controlling temperature and the like exist, and a more ideal heating effect is difficult to realize. The method comprises the following steps: the existing sheet-type and needle-type heating elements are all required to be placed in a heating cavity of a smoking set, the temperature is transferred to the heating sheet and the heating needle through heating of a heating source, then heat is transferred to tobacco in a conduction mode to achieve a heating and baking effect, the conduction rate is too slow, and the tobacco needs to be baked for a long time. In addition, the sheet-type or needle-type heating element is in contact with tobacco, so that great heat loss exists, the heat utilization rate is low, particularly, the temperature distribution is uneven, the lower temperature is high, the upper temperature is low, the local temperature is too high or the local temperature is low, the phenomena of no smoke, carbonization or burning of cigarettes or other substances are caused, and the smoking taste is seriously influenced. The sheet-type or needle-type heating element controls the heating value through the voltage applied by the smoking set, so that the temperature is controlled, the temperature control accuracy is poor, and the phenomena of no smoke, carbonization or burning of tobacco are easily caused.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a heating device and an electronic cigarette, so as to solve the problems of poor heating temperature control accuracy and uneven heating of the heating non-combustion electronic cigarette in the prior art.

The aim of the utility model is achieved by the following technical scheme:

the utility model provides a heating device which comprises a rigid substrate, a heating layer and a heat-sensitive temperature control layer, wherein the rigid substrate, the heating layer and the heat-sensitive temperature control layer are all of tubular structures, the heating layer is arranged on the outer wall of the rigid substrate, the heat-sensitive temperature control layer is arranged on the outer wall of the heating layer and is in contact with the outer surface of the heating layer, and the heat-sensitive temperature control layer is used for controlling the heating layer to be kept in a preset temperature range.

Further, the thermosensitive temperature control layer is a thermosensitive ceramic layer, and the critical temperature of the thermosensitive ceramic layer is within the preset temperature range.

Further, the heating device further comprises a tubular heat conducting layer, wherein the heat conducting layer is arranged between the rigid substrate and the heating layer, and the heat conducting layer is used for mutually insulating and spacing the rigid substrate and the heating layer.

Further, the heating device comprises an electrode, wherein the electrode comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are electrically connected with the heating layer.

Further, the positive electrode and the negative electrode are disposed close to both ends of the heating device, respectively.

Further, an end of the positive electrode and the negative electrode that are away from each other is exposed from an end of the heating device.

Further, a part of the outer side wall of the electrode is exposed from the side surface of the heating device.

Further, the electrode and the thermosensitive temperature control layer are positioned on the same layer, and the thickness of the electrode and the thickness of the thermosensitive temperature control layer are the same.

Further, the thickness of the thermosensitive temperature control layer is 5-30 mm.

Further, the heating device comprises a tubular protective layer, and the protective layer is arranged on the outer wall of the thermosensitive temperature control layer.

The application also provides an electronic cigarette comprising the heating device.

The utility model has the beneficial effects that: by arranging the heating device in a tubular structure, the heating layer is fully covered on the rigid substrate in a circumferential manner, so that heat loss can be reduced, heating efficiency can be improved, energy consumption can be reduced, heating time can be greatly shortened, heat utilization rate is high, heating temperature uniformity can be ensured, temperature uniformity of each part on the rigid substrate is ensured, and the problem that the upper end temperature and the lower end temperature of the rigid substrate are greatly different is avoided; in addition, the outer wall of the heating layer is provided with a thermosensitive temperature control layer, so that the structure is simple, the temperature of the heating layer can be monitored in real time, the accurate temperature control is performed, and the good heating effect is ensured.

Drawings

FIG. 1 is a schematic perspective view of a heating device according to the present utility model;

FIG. 2 is a schematic view of a longitudinal section of a heating device according to the present utility model;

fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

In the figure: heating device 10, accommodation hole 101, rigid substrate 11, heat conduction layer 12, heating layer 13, electrode 14, thermosensitive temperature control layer 15, and protective layer 16.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects of the heating device and the electronic cigarette according to the utility model with reference to the attached drawings and the preferred embodiment:

FIG. 1 is a schematic perspective view of a heating device according to the present utility model. FIG. 2 is a schematic longitudinal sectional view of a heating apparatus according to the present utility model. Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

As shown in fig. 1 to 3, the heating device 10 according to the present utility model has a tubular structure as a whole and has a receiving hole 101 penetrating the heating device 10, and the receiving hole 101 is used for receiving a cigarette which is not burned during heating. The heating device 10 comprises a rigid substrate 11, a heating layer 13 and a heat-sensitive temperature-control layer 15, wherein the rigid substrate 11, the heating layer 13 and the heat-sensitive temperature-control layer 15 are all tubular structures. The heating layer 13 is disposed on the outer wall of the rigid substrate 11, the heat-sensitive temperature-controlling layer 15 is disposed on the outer wall of the heating layer 13 and contacts with the outer surface of the heating layer 13, and the heat-sensitive temperature-controlling layer 15 is used for controlling the heating layer 13 to be kept within a preset temperature range.

According to the heating device 10, the heating layer 13 is arranged to be of a tubular structure and fully covers the outer wall of the rigid substrate 11 in a circumferential mode, so that heat loss can be reduced, heating efficiency can be improved, energy consumption can be reduced, heating time can be greatly shortened, heat utilization rate is high, heating temperature uniformity and temperature uniformity of each part on the rigid substrate 11 can be ensured, and the problem that the upper end temperature and the lower end temperature of the rigid substrate 11 are greatly different is avoided; in addition, the outer wall of the heating layer 13 is provided with a thermosensitive temperature control layer 15, the temperature control structure is simple, the temperature of the heating layer 13 can be monitored in real time, accurate temperature control is performed, and good heating effect is ensured.

The rigid substrate 11 may be a metal tube, a ceramic tube, a graphite tube, a glass tube, or the like. The heating layer 13 is made of gold, silver, nickel-chromium alloy, gold-silver alloy and other metals with good heating performance. The thermosensitive temperature control layer 15 is made of a material with resistance changing along with temperature, for example, a thermosensitive ceramic layer, wherein the thermosensitive ceramic layer is a functional ceramic with resistivity obviously changing along with temperature, the resistivity can be suddenly changed at a certain critical temperature, and the critical temperature of the thermosensitive ceramic layer is within a preset temperature range. When the temperature of the heating layer 13 reaches the critical temperature, the resistance of the thermosensitive temperature control layer 15 will rise suddenly, resulting in the sudden decrease of the current passing through the heating layer 13, so that the heating amount is reduced, the heating temperature is reduced, and when the temperature of the heating layer 13 is smaller than the critical temperature, the resistance of the thermosensitive temperature control layer 15 is restored to be normal, so that the heating layer 13 can be heated again, thereby keeping the temperature of the heating layer 13 within the preset temperature range, realizing accurate temperature control and good heating effect.

Further, the thickness of the rigid substrate 11 is 0.1-0.25 mm, and in this thickness range, the rigid substrate 11 has a good supporting effect, is not easy to deform, and has a good heat conducting effect. The thickness of the heating layer 13 is 1-10 mm, and the heating resistance is set to 0.3-1.0Ω. The thickness of the heating layer 13 is very thin, and the thickness of the rigid substrate 11 is also very thin, so that heat loss can be reduced, heating efficiency can be improved, energy consumption can be reduced, heating time can be greatly shortened, and heat utilization rate is high.

Further, the heating device 10 further comprises a tubular heat conducting layer 12, wherein the heat conducting layer 12 is arranged between the rigid substrate 11 and the heating layer 13, and the heat conducting layer 12 insulates the rigid substrate 11 and the heating layer 13 from each other. Specifically, the heat conducting layer 12 covers the outer wall of the rigid substrate 11, and the heating layer 13 covers the outer wall of the rigid substrate 11. The heat transfer between the heating layer 13 and the rigid substrate 11 can be reduced by the heat conducting layer 12, and if the heat conducting layer 12 is not arranged and the surface of the rigid substrate 11 is not smooth enough, gaps exist between the heating layer 13 and the rigid substrate 11, so that the heat transfer efficiency is low; in addition, since the rigid substrate 11 can also be made of conductive materials, the heat conducting layer 12 can also avoid the conductive contact between the heating layer 13 and the rigid substrate 11, and avoid the short circuit of the heating layer 13. The heat conductive layer 12 may be made of alumina, zirconia, chromia, tungsten carbide, or the like.

Further, the heating device 10 includes an electrode 14, the electrode 14 including a positive electrode and a negative electrode, each of which is electrically connected to the heating layer 13, so that a power source can supply electric power to the heating layer 13 through the electrode 14. The electrode 14 is made of a metal having good conductivity, such as silver or copper. The positive electrode and the negative electrode are respectively disposed near both ends of the heating device, and one ends of the positive electrode and the negative electrode, which are far from each other, are exposed from the ends of the heating device 10, and pressure is applied to the heating layer 13 from both ends of the heating device 10. Of course, in other embodiments, a portion of the outer side wall of the electrode 14 is exposed from the side of the heating device 10, but when covering the protective layer 16, a mask is required to cover a portion of the electrode 14 to avoid the protective layer 16 completely covering the electrode 14.

In this embodiment, the electrode 14 is in a tubular structure, the electrode 14 covers the outer wall of the heating layer 13 and contacts the outer wall of the heating layer 13, the electrode 14 and the thermosensitive temperature-controlling layer 15 are located on the same layer, and the thermosensitive temperature-controlling layer 15 is not required to be arranged at the electrode 14 on the outer wall of the heating layer 13. Preferably, the electrode 14 has the same thickness as the thermosensitive temperature-controlling layer 15 and has a thickness of 5 to 30mm, so that the outer surface of the heating device 10 can be ensured to be flat after the protective layer 16 is covered.

Further, the heating device 10 includes a tubular protective layer 16, the protective layer 16 is disposed on an outer wall of the heat-sensitive temperature-control layer 15, and the protective layer 16 is used for protecting the heating device 10, so as to reduce the probability of scratching and damaging the heat-sensitive temperature-control layer 15. The protective layer 16 is made of aluminum oxide, zirconium oxide, or the like.

The heating device 10 is manufactured as follows:

step 1, taking a stainless steel pipe with a tubular structure as a rigid substrate 11, wherein the thickness of the stainless steel pipe is 0.1-0.25 mm, and the surface of the stainless steel pipe is subjected to polishing, deoiling and degreasing, pickling, ultrasonic cleaning and other working procedures;

and 2, manufacturing a heat conduction layer 12 on the outer wall of the rigid substrate 11. Specifically, the high-temperature inorganic coating is uniformly shaken and placed into a spray gun, the stainless steel tube is placed into a jig to rotate at a constant speed, the high-temperature inorganic coating is uniformly sprayed on the surface of the stainless steel tube by the spray gun, then the stainless steel tube is placed into an oven to be baked at the temperature of 90 ℃ for one hour, and then the stainless steel tube is baked at the temperature of 150 ℃ for one hour. Wherein the thickness of the heat-conducting layer 12 is 0.05-0.15 mm, and thenThe strength is 200-250 kgf/cm ² The heat-resistant temperature is 1000-1200 ℃.

And 3, manufacturing a heating layer 13 on the outer wall of the temperature-conducting layer 12. Specifically, a metal heating film is deposited on the outer surface of the temperature-conducting layer 12 by utilizing processes such as plasma spraying, cold spraying, electron gun evaporation plating and the like, wherein the metal heating film is made of metals such as gold, silver, nickel-chromium alloy, gold-silver alloy and the like, the thickness is 1-10 mm, the heating resistance is set to be 0.3-1.0 omega, and the deposition thickness is uniform.

And 4, manufacturing a thermosensitive temperature control layer 15 on the outer wall of the heating layer 13, and depositing a thermosensitive ceramic material on the heating layer 13 by utilizing a screen printing or magnetron sputtering process to enable the outer wall of the heating layer 13 to form a thermosensitive ceramic film, wherein the thickness of the thermosensitive ceramic film is 5-30 mm, the thermosensitive ceramic material is one of BaTiO3, (SrxBa 1-x) TiO3, mnO-CuO-O2, mnO-CoO-O2, mnO-NiO-O2 and the like, and the Curie temperature is 200-300 ℃, namely the thermosensitive temperature control layer 15 is used for controlling the heating layer 13 to be kept within a preset temperature range of 200-300 ℃, so that the heating layer 13 fluctuates slightly above and below the Curie temperature.

And 5, manufacturing an electrode 14 on the outer wall of the heating layer 13. And printing silver paste on the outer wall of the heating layer 13 by adopting a screen printing process to serve as a contact of the positive electrode and the negative electrode of a circuit of the heating layer 13, drying the printed silver electrode for half an hour at 100-200 ℃, and sintering the printed silver electrode at 400-600 ℃ to obtain the silver electrode with the thickness of 5-30 mm. In the process of manufacturing the thermosensitive temperature-controlling layer 15, the electrode 14 is required to be reserved on the outer wall of the heating layer 13, for example, a mask may be used for shielding. Of course, the order of manufacturing the electrode 14 and the thermosensitive temperature-controlling layer 15 on the outer wall of the heating layer 13 may be exchanged.

And 6, manufacturing a protective layer 16 on the outer walls of the electrode 14 and the thermosensitive temperature control layer 15. The protective layer 16 is deposited on the outer walls of the electrode 14 and the thermosensitive temperature-control layer 15 by utilizing a plasma thermal spraying technology, the material of the protective layer 16 is ceramics such as alumina, zirconia and the like, and the thickness of the protective layer 16 is 5-30 mm. Wherein the electrode 14 is disposed so as to be exposed from the end of the heating device 10, the protective layer 16 may entirely cover the electrode 14; while the electrode 14 is disposed to be exposed from the side of the heating device 10, the protective layer 16 needs to be exposed to the electrode 14.

And 7, after all the films are deposited, placing the sample into an annealing furnace for rapid annealing at 300-600 ℃ for 10min, so that the crystal grains of each layer of film are closely connected, the resistance stability and reliability of the heating element are improved, and the finished product of the circumferential metal film heating element is prepared.

Example 1

A stainless steel tube having a thickness of 0.15mm was used as the rigid substrate 11 of the heating device 10, and each layer of thin films (the heat conductive layer 12, the heating layer 13, the electrode 14, the thermosensitive temperature control layer 15, and the protective layer 16) was sequentially deposited on the rigid substrate 11. The high-temperature inorganic coating of the temperature-conducting layer 12 is sprayed on the stainless steel substrate, and the thickness is 0.1mm; the thickness of the heating layer 13 is controlled within 10mm, and the resistance is 0.6 ohm; the thermosensitive temperature control layer 15 is formed by adopting (SrxBa 1-x) TiO3 as a material, and is deposited on the outer wall of the heating layer 13 in a screen printing mode, and the thickness is 25mm; meanwhile, the material of the electrode 14 is also manufactured on the outer wall of the heating layer 13 in a screen printing mode; the protective layer 16 is prepared by adopting a plasma spraying mode; finally, annealing for 10min at 450 ℃ through an annealing furnace.

Example two

Alumina ceramic is used as the rigid substrate 11 of the heating device 10, and the thickness of the alumina ceramic tube is 0.5mm, and each layer of thin film (the temperature-conducting layer 12, the heating layer 13, the electrode 14, the thermosensitive temperature-controlling layer 15 and the protective layer 16) is sequentially deposited on the rigid substrate 11. The high-temperature inorganic coating of the temperature-conducting layer 12 is sprayed on the stainless steel substrate, and the thickness is 0.05mm; the thickness of the heating layer 13 is controlled within 10mm, and the resistance is 0.6 ohm; the thermosensitive temperature control layer 15 is formed by adopting (SrxBa 1-x) TiO3 as a material, and is deposited on the outer wall of the heating layer 13 in a screen printing mode, and the thickness is 25mm; meanwhile, the material of the electrode 14 is also manufactured on the outer wall of the heating layer 13 in a screen printing mode; the protective layer 16 is prepared by adopting a plasma spraying mode; finally, annealing for 10min at 400 ℃ through an annealing furnace.

Example III

A quartz glass tube having a thickness of 0.5mm was used as the rigid substrate 11 of the heating device 10, and films (the heat conductive layer 12, the heating layer 13, the electrode 14, the heat sensitive temperature control layer 15, and the protective layer 16) were sequentially deposited on the rigid substrate 11. The high-temperature inorganic coating of the temperature-conducting layer 12 is sprayed on the stainless steel substrate, and the thickness is 0.05mm; the thickness of the heating layer 13 is controlled within 10mm, and the resistance is 0.6 ohm; the thermosensitive temperature control layer 15 is formed by adopting (SrxBa 1-x) TiO3 as a material, and is deposited on the outer wall of the heating layer 13 in a screen printing mode, and the thickness is 25mm; meanwhile, the material of the electrode 14 is also manufactured on the outer wall of the heating layer 13 in a screen printing mode; the protective layer 16 is prepared by adopting a plasma spraying mode; finally, annealing for 10min at 400 ℃ through an annealing furnace.

Table 1: examples one to three heating temperatures in comparative examples (Prior Art)

Note that: after the heating elements are powered on, the same output power is 20 watts, and after heating is carried out for 10 seconds, the temperature of the upper ends of the heating elements is tested by using thermocouples.

Table 2: examples one to three temperatures at various locations in comparative examples (Prior Art)

As can be seen from table 1 above, the heating device 10 of the present embodiment (embodiments one to three) increases in temperature faster than that of the comparative example (prior art), wherein the temperature increase rate of the first embodiment is more remarkable than that of the prior art. As can be seen from table 2 above, the upper end temperature and the intermediate temperature of the heating device 10 and the lower end temperature of the heating device 10 are hardly different from each other, and the temperatures of the respective portions are substantially uniform, so that the heating effect is improved. Among them, comparative examples 1 and 2 in the above tables 1 and 2 are sheet-type or needle-type heating elements commonly used in the prior art.

The application also provides an electronic cigarette comprising a housing, a battery, a circuit board and the heating device 10 as described above. The heating device 10 and the battery are electrically connected with a circuit board, the battery is used for providing electric energy for the heating device 10, and the circuit board is used for controlling the working state of the heating device 10. The heating device 10 is integrally arranged in the shell, but one end of the heating device 10 protrudes from the shell, and the battery and the circuit board are arranged in the shell so as to protect the battery and the circuit board. When in use, cigarettes are placed in the accommodating holes 101 of the heating device 10, the circuit board controls the battery to supply power to the heating device 10, the heating device 10 heats up and heats the cigarettes, and the tobacco material and the atomizing agent release aerosol of nicotine, smoke and other flavor components in a low-temperature non-combustion state for users to inhale. As for other specific structures of the heating non-combustible electronic cigarette, reference may be made to the prior art, and a detailed description thereof will be omitted.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the protection sought herein. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (10)

1. The utility model provides a heating device, its characterized in that includes rigid substrate (11), zone of heating (13) and thermal-sensitive temperature control layer (15), rigid substrate (11) zone of heating (13) and thermal-sensitive temperature control layer (15) are tubular structure, zone of heating (13) set up in the outer wall of rigid substrate (11), thermal-sensitive temperature control layer (15) set up in the outer wall of zone of heating (13) and with the surface of zone of heating (13) contacts, thermal-sensitive temperature control layer (15) are used for controlling zone of heating (13) keep in predetermineeing the temperature range.

2. A heating device according to claim 1, characterized in that the heat-sensitive temperature-control layer (15) is a heat-sensitive ceramic layer, the critical temperature of which is within the preset temperature range.

3. The heating device according to claim 1, characterized in that the heating device (10) further comprises a tubular temperature-conducting layer (12), the temperature-conducting layer (12) being arranged between the rigid substrate (11) and the heating layer (13), the temperature-conducting layer (12) insulating the rigid substrate (11) and the heating layer (13) from each other.

4. The heating device according to claim 1, wherein the heating device (10) comprises an electrode (14), the electrode (14) comprising a positive electrode and a negative electrode, both of which are electrically connected to the heating layer (13), the positive electrode and the negative electrode being arranged close to both ends of the heating device (10), respectively.

5. A heating device according to claim 4, wherein an end of the positive electrode and the negative electrode remote from each other is exposed from an end of the heating device (10).

6. A heating device according to claim 4, wherein a portion of the outer side wall of the electrode (14) is exposed from the side of the heating device (10).

7. A heating device according to claim 4, characterized in that the electrode (14) is located in the same layer as the heat-sensitive temperature-control layer (15), and that the thickness of the electrode (14) is the same as the heat-sensitive temperature-control layer (15).

8. A heating device according to any one of claims 1-7, characterized in that the thickness of the heat-sensitive temperature-control layer (15) is 5-30 mm.

9. A heating device according to any one of claims 1-7, characterized in that the heating device comprises a tubular protective layer (16), which protective layer (16) is arranged on the outer wall of the heat-sensitive temperature-control layer (15).

10. An electronic cigarette, characterized in that it comprises a heating device (10) according to any one of claims 1-9.

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