ATOMIZING DEVICE AND MICROWAVE HEATING ASSEMBLY

Abstract

 An atomizing device and a microwave heating assembly (10). The microwave heating assembly (10) comprises a cavity (1), a conductor column (2), a microwave feed-in device (3), and a temperature measurement device (6), wherein the cavity (1) is cylindrical and has a closed bottom, and a feed-in hole (11) is formed in a side wall of the cavity (1), so that the microwave feed-in device (3) feeds microwaves into the cavity (1) through the feed-in hole (11); the conductor column (2) is arranged at the bottom in the cavity (1), and the conductor column (2) is connected to the bottom of the cavity (1) and is electrically conductive; and the temperature measurement device (6) is arranged in the cavity (1) for measuring the temperature of an aerosol forming matrix (7) inserted into the cavity (1). The temperature measurement device (6) of the microwave heating assembly (10) can more accurately acquire the atomization temperature of the aerosol forming matrix (7) in the cavity (1), so that a user can adjust the action according to the temperature in time, and can control the release amount of harmful substances in the aerosol forming matrix (7).

Description

FIELD

[0001] The present invention relates to the field of atomization, and more specifically, to an atomization device and a microwave heating assembly.

BACKGROUND

[0002] Generally, the heating temperature of heat-not-burn (HNB) fuming substrate is between 250-350°C. Compared with ordinary burning cigarettes, HNB cigarette can greatly reduce the harm of harmful substances in tobacco to smokers while retaining the taste of traditional cigarettes. There is no high-temperature burning pyrolysis process, thereby reducing the release amount of tar and harmful substances in tobacco and greatly reducing the harm of second-hand smoking.

[0003] The volume for ordinary microwave heating is relatively large, which is not conducive to the application in the field of atomization devices with a volume requirement. In addition, the internal temperature during microwave heating is not easily grasped, and too high or low temperature is not conducive to the heating of aerosol generating substrate. Therefore, it is necessary to detect the temperature in real time so as to facilitate users to make adjustments.

SUMMARY

[0004] The technical problem to be solved by the present invention is to provide an atomization device and a microwave heating assembly according to the above defects in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problems is as follows: manufacture a microwave heating assembly which comprises a cavity, a conductor pillar, a microwave feeding device, and a temperature measuring device;

the cavity is columnar with a closed bottom, and the side wall of the cavity is provided with a feed hole, so that the microwave feeding device can feed microwaves into the cavity through the feeding hole;

the conductor pillar is arranged at the bottom of the cavity, and the conductor pillar is connected to the bottom of the cavity and conducts electricity;

the temperature measuring device is arranged in the cavity for measuring the temperature of the aerosol generating substrate inserted into the cavity.

[0006] Preferably, the middle portion of the conductor pillar is provided with an accommodating hole, and the temperature measuring device is inserted into the accommodating hole.

[0007] Preferably, the temperature measuring device comprises a hollow probe, and a temperature measuring assembly, wherein the temperature measuring assembly is inserted into the probe, and the outer end of the probe is closed.

[0008] Preferably, the temperature measuring assembly comprises a thermocouple or an optical fiber.

[0009] Preferably, the probe is in ohmic contact with the conductor pillar.

[0010] Preferably, the microwave feeding device is inserted into the cavity through the feeding hole, and it is in contact with the inner wall surface of the cavity and/or the surface of the conductor pillar for conduction to feed microwaves into the cavity;
a dielectric body is arranged between the outer wall surface of the conductor pillar and the inner wall surface of the cavity.

[0011] Preferably, the cavity is made of conductive metal.

[0012] Preferably, the inner wall surface of the cavity is coated with a first conductive layer.

[0013] Preferably, the conductor pillar has a hollow or solid structure, and its outer wall is electrically conductive.

[0014] Preferably, the conductor pillar is a conductive material.

[0015] Preferably, the outer wall surface of the conductor pillar is coated with a second conductive layer.

[0016] Preferably, the microwave feeding device is in a linear shape, and one end of it is in contact with the side wall surface of the conductor pillar for conduction.

[0017] Preferably, the microwave feeding device is in an L shape, and one end of it is in contact with the bottom surface of the cavity for conduction.

[0018] Preferably, the dielectric body is lower than the conductor pillar, or flush with the conductor pillar, or higher than the conductor pillar, and it is lower than the cavity, or flush with the cavity, or higher than the cavity.

[0019] Preferably, the inner ring of the dielectric body is provided with a positioning portion protruding towards the middle portion.

[0020] Preferably, the positioning portions are edges and ribs.

[0021] Preferably, the material of the dielectric body includes alumina, corundum, mullite, forsterite, magnesia, zirconia, silicon oxide, zirconite, boron nitride, aluminum nitride, spodumene, one or at least two combinations of BaTiO3 porcelain with ε between 30 and 40, MgTiO3, CaTiO3 porcelain, SrTiO3, Ba(Zn, Nb)O3, Ba (Sr, Ta) O3, BaO-Nd2O3-TiO2 and BaO-Sm2O3-TiO2 rare earth mixed crystal with ε between 70 and 90.

[0022] Preferably, the cavity is further provided with a fixing device for fixing the aerosol generating substrate, and the material of the fixing device can penetrate through microwaves.

[0023] Preferably, the loss tangent of the material of the fixing device is less than 0.1.

[0024] Preferably, the fixing device is made of plastic.

[0025] An atomization device comprises the microwave heating assembly.

[0026] The atomization device and the microwave heating assembly in the present invention have the following beneficial effects: The temperature measuring device of the microwave heating assembly can accurately grasp the atomization temperature of the aerosol generating substrate in the cavity, so that the user can make a timely action adjustment according to the temperature, and control the release amount of harmful substances in the aerosol generating substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

FIG. 1 is a module diagram of the atomization device in an embodiment of the present invention;

FIG. 2 is a schematic diagram of the three-dimensional structure of the microwave heating assembly in the embodiment of the present invention;

FIG. 3 is a sectional structure diagram of the microwave heating assembly in FIG. 1;

FIG. 4 is a schematic structural diagram of the microwave heating resonant cavity;

FIG. 5 is a schematic diagram when the dielectric body is higher than the conductor pillar;

FIG. 6 is a schematic diagram when the dielectric body is lower than the conductor pillar; and

FIG. 7 is a schematic diagram when the dielectric body is flush with the conductor pillar.

DETAILED DESCRIPTION

[0028] To have a clearer understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] As shown in FIG. 1, the atomization device in a preferred embodiment of the present invention comprises a microwave heating assembly 10, a control module 20, a battery module 30, and a microwave generator 40. The battery module 30 is electrically connected to the control module 20 and the microwave generator 40 to supply power to the control module 20 and the microwave generator 40, so that the microwave feeding device can generate a microwave 40. The control module 20 is used to control the microwave power, heating time and start-stop interval of the microwave generator 40.

[0030] Referring to FIG. 2, the microwave heating assembly 10 comprises a cavity 1, a conductor pillar 2, and a microwave feeding device 3. The cavity 1 can be inserted with an aerosol generating substrate 7, and the aerosol generating substrate can be tobacco. The microwave generator 40 is connected to the microwave feeding device 3. The microwave feeding device 3 is arranged between the microwave generator 40 and the cavity 1, and used for transmitting the microwave generated by the microwave generator 40 to the cavity 1 and heating the aerosol generating substrate 7 in the cavity 1 through the microwave.

[0031] The cavity 1 is columnar with one end closed, and the side wall of the cavity 1 is provided with a feeding hole 11. The conductor pillar 2 is arranged at the bottom of the cavity 1, and the conductor pillar 2 is connected to the bottom of the cavity 1 and conducts electricity.

[0032] The microwave feeding device 3 is inserted into the cavity 1 through the feeding hole 11, and it is in contact with the inner wall surface of the cavity 1 and/or the surface of the conductor pillar 2 to feed microwaves into the cavity 1.

[0033] Preferably, in this embodiment, a dielectric body 4 is arranged between the outer wall surface of the conductor pillar 2 and the inner wall surface of the cavity 1.

[0034] As shown in FIG. 4, according to the working principle of λ/4 resonant cavity:

[0035] The λ/4 coaxial resonant cavity is composed of a coaxial line with one end short-circuited and the other end open-circuited. The open-circuiting of the λ/4 coaxial resonant cavity is realized by a section of circular waveguide in the cut-off state. According to the boundary conditions at both ends, the cavity length l is equal to an odd multiple of λ₀/4 during resonance, that is, l =[(2p-1) λ₀]/4 (p = 1, 2, 3, ...). Therefore, the resonant wavelength of λ/4 coaxial resonant cavity is:

[0036] The quality factor of λ/4 coaxial resonant cavity is:

[0037] The difference between λ/4 coaxial resonant cavity and λ/2 coaxial resonant cavity is that the former does not have a conductor loss on the end face.

[0038] The selection of transverse dimensions of λ/2 and λ/4 coaxial resonant cavities should be determined by the following conditions:

(1) Ensure that the coaxial resonant cavity works in the TEM mode without high-order mode requirement:

(2) Ensure that the coaxial resonant cavity has a relatively high Q₀ value:

(3) For the λ/4 coaxial resonant cavity, the circular waveguide at the open-circuited end is in the cut-off state, and it should be 1.71D < λ_0min, namely, 3.41b < λ_0min.

[0039] According to the calculation formula for the length l of the resonant cavity, the minimum dimension of the λ/4 coaxial resonant cavity is ≈ 1/4 of the electromagnetic wavelength. The wavelength of 2.45GHz electromagnetic wave in air is about 12.24cm, and at this moment, l is about 3.06cm. If l is shortened, it is necessary to shorten the wavelength of electromagnetic wave. The wavelength of electromagnetic wave in the material can be calculated according to the following formula:

. For dielectric materials, µr is generally l. The larger εr, the shorter the wavelength. l can be designed shorter, and then the miniaturization of the cavity 1 can be realized.

[0040] The microwave heating assembly 10 can reduce the length of the resonant cavity by filling the cavity 1 with high dielectric material, thereby reducing the volume of the cavity 1, and facilitating the miniaturization of the atomization device. The aerosol generating substrate 7 can be placed in the cavity, and the aerosol generating substrate 7 can be heated by microwave to greatly reduce the harm of harmful substances in tobacco to smokers. There is no high-temperature burning pyrolysis process, thereby reducing the release amount of tar and harmful substances in tobacco and greatly reducing the harm of second-hand smoking.

[0041] In some embodiments, the cavity 1 is made of conductive metal, and the material is generally aluminum, copper, gold, silver, stainless steel and other conductive metals. In other embodiments, the inner wall surface of the cavity 1 is coated with a first conductive layer 12, such as gold plating, silver plating, copper plating, etc.

[0042] Further, in some embodiments, the conductor pillar 2 is a hollow or solid structure, and its outer wall is electrically conductive, so that microwave radiation is formed in the cavity 1 after the microwave is fed into the cavity 1.

[0043] In addition, the conductor pillar 2 is a conductive material, preferably a conductive metal material or other materials with high conductivity.

[0044] In other embodiments, the conductor pillar 2 can also be made of a nonmetallic material, the outer wall surface of the conductor pillar 2 is coated with a second conductive layer 21, and the second conductive layer 21 is a metal-plated thin film layer, such as gold plating, silver plating, copper plating, etc.

[0045] As shown in FIG. 3, in some embodiments, the microwave feeding device 3 is generally a coaxial connector. One end of it is connected to the microwave generator 40 of the microwave source, and the other end of it is inserted into the cavity 1 through the feeding port. Generally, the microwave feeding device 3 can be in a linear shape, and one end of it inserted into the cavity 1 is in contact with the side wall surface of the conductor pillar 2 for conduction.

[0046] As shown in FIG. 5, in other embodiments, the microwave feeding device 3 can also be in an L shape, and one end of it inserted into the cavity 1 is in contact with the bottom surface of the cavity 1 for conduction. Alternatively, the end of the microwave feeding device 3 inserted into the cavity 1 can be in an arc shape or other shapes, so long as it is in contact with the inner wall surface of the cavity 1 or the outer wall surface of the conductor pillar 2 for conduction.

[0047] In some embodiments, as shown in FIG. 6, the dielectric body 4 is lower than the conductor pillar 2. As shown in FIG. 7, the dielectric body 4 can also be flush with the conductor pillar 2. As shown in FIG. 3 and FIG. 5, the dielectric body 4 can also be higher than the conductor pillar 2 and lower than the cavity 1. In other embodiments, the dielectric body 4 can also be flush with or higher than the cavity 1.

[0048] As shown in FIG. 3 and FIG. 5, when the dielectric body 4 is higher than the conductor pillar 2 and lower than the cavity 1, or the dielectric body 4 is flush with the cavity 1, or the dielectric body 4 is higher than the cavity 1, the dielectric body 4 can fix the aerosol generating substrate 7. That is, the inner aperture of the dielectric body 4 is slightly greater than the diameter of the aerosol generating substrate 7, so that the aerosol generating substrate 7 can be inserted into the inner hole of the dielectric body 4 for fixing.

[0049] Preferably, the inner ring of the dielectric body 4 is provided with a positioning portion (no figure) protruding towards the middle portion, so that the aerosol generating substrate 7 inserted into the dielectric body 4 can be positioned and engaged. Generally, the positioning portions are edges and ribs, which can not only fix the aerosol generating substrate 7, but also form an air passage between the inner wall surface of the dielectric body 4 and the aerosol generating substrate 7 to allow the fume to flow.

[0050] In other embodiments, as shown in FIG. 6 and FIG. 7, when the dielectric body 4 is lower than or flush with the conductor pillar 2, and it is not easy to fix the aerosol generating substrate 7 by the dielectric body 4, a fixing device 5 for fixing the aerosol generating substrate 7 can be arranged in the cavity 1, and the material of the fixing device 5 can penetrate through microwaves to atomize the aerosol generating substrate 7 by microwaves.

[0051] Further, the loss tangent of the material of the fixing device 5 is less than 0.1, and the material of the fixing device 5 is made of plastic. Specifically, it can be polyether ether ketone (PEEK).

[0052] In some embodiments, the material of the dielectric body 4 can include alumina, corundum, mullite, forsterite, magnesia, zirconia, silicon oxide, zirconite, boron nitride, aluminum nitride, spodumene and various glass dielectric materials, etc., one or at least two combinations of BaTiO3 porcelain with ε between 30 and 40, MgTiO3, CaTiO3 porcelain, SrTiO3, Ba(Zn, Nb)O3, Ba (Sr, Ta) O3, BaO-Nd2O3-TiO2 and BaO-Sm2O3-TiO2 rare earth mixed crystal with ε between 70 and 90.

[0053] Preferably, the material of the dielectric body 4 is alumina or zirconia.

[0054] As shown in FIG. 3, FIG. 5, FIG. 6 and FIG. 7, in order to accurately grasp the atomization temperature of the aerosol generating substrate 7 in the cavity 1 and let the user make a timely action adjustment according to the temperature, a temperature measuring device 6 is further provided in the cavity 1 to measure the temperature of the aerosol generating substrate inserted into the cavity. Preferably, the middle portion of the conductor pillar 2 is provided with an accommodating hole 22, and the temperature measuring device 6 is inserted into the accommodating hole 22 to sense the temperature value in the middle portion of the cavity 1.

[0055] Further, in this embodiment, the temperature measuring device 6 comprises a hollow probe 61, and a temperature measuring assembly 62, the temperature measuring assembly 62 is inserted in the probe 61, and the outer end of the probe 61 is closed. Generally, the temperature measuring assembly 62 comprises a thermocouple or an optical fiber, and preferably a thermocouple.

[0056] The center probe makes it possible to use a thermocouple (ptc/ntc) for temperature measurement, and the shell probe 61 of the temperature measuring device 6 is in ohmic contact with the conductor pillar 2.

[0057] It can be understood that the above technical features can be used in any combination without limitation.

[0058] The above are only the embodiments of the present invention and do not limit the claims of the present invention. Any equivalent structure or equivalent process transformation that is made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, is similarly included in the patent protection scope of the present invention.

Claims

1. A microwave heating assembly, characterized by comprising a cavity (1), a conductor pillar (2), a microwave feeding device (3), and a temperature measuring device (6);

the cavity (1) is columnar with a closed bottom, and the side wall of the cavity (1) is provided with a feeding hole (11), so that the microwave feeding device (3) can feed microwaves into the cavity (1) through the feeding hole (11);

the conductor pillar (2) is arranged at the bottom of the cavity (1), and the conductor pillar (2) is connected to the bottom of the cavity (1) and conducts electricity;

the temperature measuring device (6) is arranged in the cavity (1) for measuring the temperature of the aerosol generating substrate inserted into the cavity.

2. The microwave heating assembly according to claim 1, characterized in that the middle portion of the conductor pillar (2) is provided with an accommodating hole (22), and the temperature measuring device (6) is inserted into the accommodating hole (22).

3. The microwave heating assembly according to claim 1, characterized in that the temperature measuring device (6) comprises a hollow probe (61), and a temperature measuring assembly (62), the temperature measuring assembly (62) is inserted in the probe (61), and the outer end of the probe (61) is closed.

4. The microwave heating assembly according to claim 3, characterized in that the temperature measuring assembly (62) comprises a thermocouple or an optical fiber.

5. The microwave heating assembly according to claim 3, characterized in that the probe (61) is in ohmic contact with the conductor pillar (2).

6. The microwave heating assembly according to any of claims 1-5, characterized in that the microwave feeding device (3) is inserted into the cavity (1) through the feeding hole (11), and it is in contact with the inner wall surface of the cavity (1) and/or the surface of the conductor pillar (2) for conduction to feed a microwave into the cavity (1);
a dielectric body (4) is arranged between that outer wall surface of the conductor pillar (2) and the inn wall surface of the cavity (1).

7. The microwave heating assembly according to claim 6, characterized in that the cavity (1) is made of conductive metal.

8. The microwave heating assembly according to claim 6, characterized in that the inner wall surface of the cavity (1) is coated with a first conductive layer (12).

9. The microwave heating assembly according to any of claims 1-5, characterized in that the conductor pillar (2) has a hollow or solid structure, and its outer wall is electrically conductive.

10. The microwave heating assembly according to any of claims 1-5, characterized in that the conductor pillar (2) is a conductive material.

11. The microwave heating assembly according to any of claims 1-5, characterized in that the outer wall surface of the conductor pillar (2) is coated with a second conductive layer (21).

12. The microwave heating assembly according to claim 6, characterized in that the microwave feeding device (3) is in a linear shape, and one end of it is in contact with the side wall surface of the conductor pillar (2) for conduction.

13. The microwave heating assembly according to claim 6, characterized in that the microwave feeding device (3) is in an L shape, and one end of it is in contact with the bottom surface of the cavity (1) for conduction.

14. The microwave heating assembly according to claim 6, characterized in that the dielectric body (4) is lower than the conductor pillar (2), or flush with the conductor pillar (2), or higher than the conductor pillar (2), and it is lower than the cavity (1), or flush with the cavity (1) or higher than the cavity (1).

15. The microwave heating assembly according to claim 14, characterized in that the inner ring of the dielectric body (4) is provided with a positioning portion protruding towards the middle portion.

16. The microwave heating assembly according to claim 15, characterized in that the positioning portions are edges and ribs.

17. The microwave heating assembly according to claim 6, characterized in that the material of the dielectric body (4) includes alumina, corundum, mullite, forsterite, magnesia, zirconia, silicon oxide, zirconite, boron nitride, aluminum nitride, spodumene, one or at least two combinations of BaTiO₃ porcelain with ε between 30 and 40, MgTiO₃, CaTiO₃ porcelain, SrTiO₃, Ba(Zn, Nb)O3, Ba (Sr, Ta) O₃, BaO-Nd₂O₃-TiO₂ and BaO-Sm₂O₃-TiO₂ rare earth mixed crystal with ε between 70 and 90.

18. The microwave heating assembly according to any of claims 1-5, characterized in that the cavity (1) is further provided with a fixing device (5) for fixing the aerosol generating substrate (7), and the material of the fixing device (5) can penetrate through microwaves.

19. The microwave heating assembly according to claim 18, characterized in that the loss tangent of the material of the fixing device (5) is less than 0.1.

20. The microwave heating assembly according to claim 18, characterized in that the fixing device (5) is made of plastic.

21. An atomization device, characterized by comprising the microwave heating assembly in any of claims 1-20.

Drawing