Atomization device and microwave heating module

Abstract

Of the atomizer and microwave heating module (10), the microwave heating module (10) includes a cavity (1), a conductor rod (2), a microwave supply device (3), and a temperature measuring device (6). The cavity (1) is columnar and has a closed bottom. A supply hole (11) is provided in the side wall of the cavity (1), and the microwave supply device (3) supplies microwaves into the cavity (1) through the supply hole (11). The conductor rod (2) is provided at the bottom of the cavity (1). The conductor rod (2) is connected to the bottom of the cavity (1) and is conductive. The temperature measuring device (6) is provided in the cavity (1) and is used to measure the temperature of the aerosol-forming substrate (7) inserted into the cavity (1). The temperature measuring device (6) of the microwave heating module (10) can more accurately grasp the atomization temperature of the aerosol-forming substrate (7) in the cavity (1), allowing the user to quickly operate and adjust based on the temperature, thereby controlling the amount of harmful substances released in the aerosol-forming substrate (7).

Description

[Technical Field]

[0001] The present invention relates to the field of atomization, and more particularly to an atomization device and a microwave heating module. [Background technology]

[0002] Generally, the heating temperature of non-combustion, heated vapor generating substrates is between 250 and 350°C. Compared to conventional combustible cigarettes, non-combustible, heated tobacco significantly reduces the harmful effects of harmful substances in tobacco leaves on smokers while maintaining the flavor of traditional cigarettes. In addition, because no decomposition process occurs due to high-temperature combustion, the amount of tar and harmful substances released from tobacco leaves is reduced, significantly reducing the harm caused by passive smoking.

[0003] Conventional microwave heating requires a large volume, which is disadvantageous for applications in atomization devices, which require large volumes. Furthermore, it is difficult to measure the internal temperature when using microwave heating, and if the temperature is too high or too low, it will be disadvantageous for heating the aerosol-forming substrate. Therefore, it is necessary to detect the temperature in real time to make adjustments easily. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem to be solved by the present invention is to provide an atomization device and a microwave heating module that address the above-mentioned shortcomings in the prior art. [Means for solving the problem]

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] A microwave heating module is constructed including a cavity, a conductor rod, a microwave supply device and a temperature measuring device.

[0007] The cavity has a cylindrical shape and a closed bottom, and a supply hole is provided in the side wall of the cavity, so that the microwave supply device supplies microwaves into the cavity through the supply hole.

[0008] The conductive rod is provided at the bottom of the cavity and is connected to the bottom of the cavity for electrical conduction.

[0009] The temperature measuring device is provided in the cavity and is used to measure the temperature of the aerosol-forming substrate inserted into the cavity.

[0010] Preferably, the conductor rod has a receiving hole in the center thereof, and the temperature measuring device is inserted into the receiving hole.

[0011] Preferably, the temperature measuring device includes a hollow probe and a temperature measuring module, the temperature measuring module being inserted into the probe and the outer end of the probe being closed.

[0012] Preferably, the temperature measurement module includes a thermocouple or an optical fiber.

[0013] Preferably, the probe makes ohmic contact with the conductive rod.

[0014] Preferably, the microwave supply device is inserted into the cavity through the supply hole and contacts the inner wall surface of the cavity and / or the surface of the conductor rod to establish electrical contact, thereby supplying microwaves into the cavity.

[0015] A dielectric is provided between the outer wall surface of the conductor rod and the inner wall surface of the cavity.

[0016] Preferably, the cavity is made of a conductive metal material.

[0017] Preferably, the inner wall surface of the cavity is coated with a first conductive layer.

[0018] Preferably, the conductor rod is a hollow or solid structure, and the outer wall is electrically conductive.

[0019] Preferably, the conductor rod is made of an electrically conductive material.

[0020] Preferably, the outer wall surface of the conductor rod is coated with a second conductive layer.

[0021] Preferably, the microwave supply device has a straight line shape, and one end thereof contacts and conducts with the side wall surface of the conductor rod.

[0022] Preferably, the microwave supply device is L-shaped, and one end of the microwave supply device is in contact with and conductive to the bottom surface of the cavity.

[0023] Preferably, the dielectric is lower than the conductor rods, aligned with the conductor rods, higher than the conductor rods and lower than the cavity, aligned with the height of the cavity, or higher than the cavity.

[0024] Preferably, the dielectric body has an inner periphery provided with a positioning portion that protrudes toward the center.

[0025] Preferably, the positioning features are ridges and ribs.

[0026] Preferably, the dielectric material includes one or a combination of at least two of aluminum oxide, corundum, mullite, forsterite, magnesium oxide, zirconia, silicon oxide, zircon, boron nitride, aluminum nitride, spodumene, BaTiO3-based porcelain with ε between 30 and 40, MgTiO3, CaTiO3-based porcelain, SrTiO3, Ba(Zn,Nb)O3-based, Ba(Sr,Ta)O3-based, and BaO-Nd2O3-TiO2, BaO-Sm2O3-TiO2 rare earth mixed crystal with ε between 70 and 90.

[0027] Preferably, the cavity further comprises a fixing device for fixing the aerosol-forming substrate, the fixing device being made of a material that allows microwaves to pass through.

[0028] Preferably, the material of the fixing device has a dissipation factor of less than 0.1.

[0029] Preferably, the anterior fixation device is made of plastic.

[0030] The atomization device includes the microwave heating module. [Effects of the Invention]

[0031] The implementation of the atomization device and microwave heating module of the present invention has the following beneficial effects: the temperature measuring device of the microwave heating module can more accurately determine the atomization temperature of the aerosol-forming substrate in the cavity, allowing the user to quickly operate and adjust based on the temperature, thereby controlling the amount of harmful substances released in the aerosol-forming substrate.

[0032] The present invention will be further described below in combination with the drawings and examples. [Brief explanation of the drawings]

[0033] [Figure 1] FIG. 1 is a schematic diagram of a module of an atomization device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the three-dimensional structure of a microwave heating module in an embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram of the cross-sectional structure of the microwave heating module of FIG. [Figure 4] FIG. 4 is a schematic structural diagram of a microwave heating resonant cavity. [Figure 5] FIG. 5 is a schematic diagram showing the case where the dielectric is higher than the conductor rod. [Figure 6] FIG. 6 is a schematic diagram of the case where the dielectric is lower than the conductor rod. [Figure 7]FIG. 7 is a schematic diagram showing the case where the heights of the dielectric and the conductor rods are aligned. DETAILED DESCRIPTION OF THE INVENTION

[0034] In order to make the technical features, objects and effects of the present invention more clearly understood, specific embodiments of the present invention will be described in detail with reference to the drawings.

[0035] 1, the atomization device in a preferred embodiment of the present invention includes a microwave heating module 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 electricity to the control module 20 and the microwave generator 40, causing the microwave supply device 40 to generate microwaves. The control module 20 is used to control parameters such as microwave power output by the microwave generator 40, heating time, on / off interval, etc.

[0036] 2, the microwave heating module 10 includes a cavity 1, a conductor rod 2, and a microwave supply device 3. An aerosol-forming substrate 7 can be inserted into the cavity 1. The aerosol-forming substrate can be tobacco leaves or the like. A microwave generator 40 is connected to the microwave supply device 3. The microwave supply device 3 is provided between the microwave generator 40 and the cavity 1 and is used to transmit microwaves generated by the microwave generator 40 into the cavity 1 and heat the aerosol-forming substrate 7 in the cavity 1 with the microwaves.

[0037] The cavity 1 is cylindrical and has one closed end. A supply hole 11 is provided in the side wall of the cavity 1. The conductive rod 2 is provided at the bottom of the cavity 1. The conductive rod 2 is connected to the bottom of the cavity 1 and is conductive.

[0038] The microwave supply device 3 is inserted into the cavity 1 through the supply hole 11 and contacts the inner wall surface of the cavity 1 and / or the surface of the conductor rod 2 for conduction, thereby supplying microwaves into the cavity 1.

[0039] In this embodiment, a dielectric 4 is preferably provided between the outer wall surface of the conductor rod 2 and the inner wall surface of the cavity 1 .

[0040] Combining Figure 4, the working principle of the λ / 4 resonant cavity is as follows:

[0041] A λ / 4 coaxial resonant cavity consists of a coaxial cable with one end shorted and one end open.

[0042] The open end of the λ / 4 coaxial cable resonant cavity is realized by a circular waveguide in a cutoff state. Based on the boundary conditions at the two end faces, at resonance, the cavity length l is λ 0 / 4 Therefore, the resonant wavelength of the λ / 4 coaxial cable resonant cavity is as follows:

[0043]

number

[0044] The Q value of the λ / 4 coaxial cable resonant cavity is as follows:

[0045]

number

[0046] The difference between the λ / 4 coaxial resonant cavity and the λ / 2 coaxial resonant cavity is that there is one less conductor loss at the end face.

[0047] The selection of the transverse size of the λ / 2 and λ / 4 coaxial cable resonant cavities should be determined by the following conditions:

[0048] (1) To ensure that the coaxial cable resonant cavity operates in the TEM mode without introducing higher-order modes, π(d+D) / 2<λ 0min That is, π(a+b)<λ 0min This should be the case.

[0049] (2) To ensure that the coaxial cable resonant cavity has a high Q value, 2≦(D / d)≦6) should be satisfied, i.e., 2≦(b / a)≦6).

[0050] (3) In the case of a λ / 4 coaxial cable resonant cavity, it is further necessary to ensure that the open-ended circular waveguide is cut off, and 1.71D<λ 0min That is, 3.41b<λ 0min This should be the case.

[0051] As is clear from the formula for calculating the length l of the resonant cavity, the minimum size of a λ / 4 coaxial resonant cavity is approximately 1 / 4 of the electromagnetic wavelength. Since the wavelength of a 2.45 GHz electromagnetic wave in air is approximately 12.24 cm, l is approximately 3.06 cm. To shorten l, the wavelength of the electromagnetic wave must be shortened. The wavelength of the electromagnetic wave within a material can also be calculated using the following formula.

[0052]

number

[0053] In the case of dielectric materials, μr is generally equal to l. The larger εr, the shorter the wavelength becomes, and l can also be designed to be shorter, making it possible to miniaturize the cavity 1.

[0054] The microwave heating module 10 allows the length of the resonant cavity to be reduced by filling the cavity 1 with a high-dielectric material. This reduces the volume of the cavity 1, which is advantageous for miniaturizing the atomization device. An aerosol-forming substrate 7 can be placed inside the cavity. By heating the aerosol-forming substrate 7 with microwaves, the harm caused to smokers by harmful substances in tobacco leaves can be significantly reduced. In addition, because no decomposition process occurs due to high-temperature combustion, the amount of tar and harmful substances released from tobacco leaves is reduced, making it possible to significantly reduce the harm caused by passive smoking.

[0055] In some embodiments, the cavity 1 is made of a conductive metal material. Typically, the material is a conductive metal such as aluminum, copper, gold, silver, stainless steel, etc. In other embodiments, the inner wall surface of the cavity 1 may be coated with a first conductive layer 12, such as gold plating, silver plating, copper plating, etc.

[0056] Furthermore, in some embodiments, the conductor rod 2 is a hollow or solid structure, and the outer wall is conductive, so that microwave radiation is formed within the cavity 1 after microwaves are supplied to the cavity 1.

[0057] The conductor rod 2 is made of a conductive material, preferably a conductive metal material, or other highly conductive materials.

[0058] In other embodiments, the conductor rod 2 may be made of a non-metallic material, and the outer wall surface of the conductor rod 2 may be coated with a second conductive layer 21. The second conductive layer 21 may be a thin metal plating layer such as gold plating, silver plating, copper plating, etc.

[0059] 3, in some embodiments, the microwave supply device 3 is generally a coaxial connector, one end of which is connected to the microwave generator 40, which is a microwave source, and the other end of which is inserted into the cavity 1 through a supply port. Usually, the microwave supply device 3 has a straight line shape, and the end inserted into the cavity 1 contacts the side wall surface of the conductor rod 2 for electrical conduction.

[0060] 5, in another embodiment, the microwave supply device 3 may be L-shaped, and one end inserted into the cavity 1 may contact the bottom surface of the cavity 1 for electrical conduction. Alternatively, the shape of the one end of the microwave supply device 3 inserted into the cavity 1 may be other shapes such as an arc shape, as long as it can contact the inner wall surface of the cavity 1 or the outer wall surface of the conductor rod 2 for electrical conduction.

[0061] In some embodiments, the dielectric 4 is lower than the conductive rod 2, as shown in Figure 6. Alternatively, the dielectric 4 may be aligned with the conductive rod 2, as shown in Figure 7. Alternatively, the dielectric 4 may be higher than the conductive rod 2 and lower than the cavity 1, as shown in Figures 3 and 5. In other embodiments, the dielectric 4 may be aligned with the height of the cavity 1 or may be higher than the cavity 1.

[0062] 3 and 5, in some situations, such as when the dielectric 4 is higher than the conductor rod 2 and lower than the cavity 1, or when the heights of the dielectric 4 and the cavity 1 are aligned, or when the dielectric 4 is higher than the cavity 1, the dielectric 4 also has the function of fixing the aerosol-forming substrate 7. That is, the diameter of the inner hole of the dielectric 4 is slightly larger than the diameter of the aerosol-forming substrate 7, and the aerosol-forming substrate 7 is inserted into the inner hole of the dielectric 4 and fixed therein.

[0063] Preferably, the dielectric 4 is provided on its inner periphery with a positioning portion (not shown) that protrudes toward the center, and is capable of positioning and engaging the aerosol-forming substrate 7 inserted into the dielectric 4. Typically, the positioning portion is a protrusion or rib that can fix the aerosol-forming substrate 7 and also form a gas path between the inner wall surface of the dielectric 4 and the aerosol-forming substrate 7 to allow vapor to flow.

[0064] 6 and 7 , in some other embodiments, when the dielectric 4 is lower than the conductive rod 2 or aligned with the conductive rod 2 and it is difficult to fix the aerosol-forming substrate 7 by the dielectric 4, a fixing device 5 for fixing the aerosol-forming substrate 7 in the cavity 1 may be further provided. The fixing device 5 is made of a material that allows microwaves to pass through and atomize the aerosol-forming substrate 7 by microwaves.

[0065] Furthermore, the dielectric loss tangent of the material of the fixing device 5 is less than 0.1. The material of the fixing device 5 is plastic. Specifically, it may be peek, that is, polyetheretherketone.

[0066] In some embodiments, the material of the dielectric 4 may include aluminum oxide, corundum, mullite, forsterite, magnesium oxide, zirconia, silicon oxide, zircon, boron nitride, aluminum nitride, spodumene, various glass dielectric materials, etc., or a combination of one or at least two of BaTiO3-based porcelain, MgTiO3, CaTiO3-based porcelain, SrTiO3, Ba(Zn,Nb)O3-based, Ba(Sr,Ta)O3-based, and BaO-Nd2O3-TiO2, BaO-Sm2O3-TiO2 rare earth mixed crystals with ε between 70 and 90.

[0067] Preferably, the material of the dielectric 4 is aluminum oxide or zirconia.

[0068] As shown in Figures 3, 5, 6 and 7, in order to more accurately grasp the atomization temperature of the aerosol-forming substrate 7 in the cavity 1 and allow the user to quickly operate and adjust based on the temperature, a temperature measuring device 6 for measuring the temperature of the aerosol-forming substrate inserted into the cavity is further provided in the cavity 1. Preferably, an accommodation hole 22 is opened in the center of the conductor rod 2. The temperature measuring device 6 is inserted into the accommodation hole 22 to detect the temperature value at the center of the cavity 1.

[0069] Furthermore, in this embodiment, the temperature measuring device 6 includes a hollow probe 61 and a temperature measuring module 62. The temperature measuring module 62 is inserted into the probe 61, and the outer end of the probe 61 is closed. Typically, the temperature measuring module 62 includes a thermocouple or an optical fiber, and preferably includes a thermocouple.

[0070] The central probe can measure the temperature using a thermocouple (ptc / ntc). The probe 61, which is the casing of the temperature measuring device 6, is in ohmic contact with the conductor rod 2.

[0071] As can be understood, the above technical features can be used in any combination without limitation.

[0072] The above description is merely an embodiment of the present invention, and does not limit the scope of the present invention. Any equivalent structure or equivalent flow modification made using the contents of the specification and drawings of the present invention, or any direct or indirect operation in other related technical fields, is also included in the scope of protection of the present invention for the same reasons.

Claims

1. The device includes a cavity (1), a conductor rod (2), a microwave supply device (3), and a temperature measuring device (6), The cavity (1) is columnar and has a closed bottom. A supply hole (11) is provided in the side wall of the cavity (1). This allows the microwave supply device (3) to supply microwaves into the cavity (1) through the supply hole (11). The conductor rod (2) is provided at the bottom of the cavity (1), and the conductor rod (2) is connected to the bottom of the cavity (1) and is electrically conductive; the temperature measuring device (6) is provided in the cavity (1) and is used to measure the temperature of an aerosol-forming substrate inserted into the cavity; The microwave heating module is characterized in that the temperature measuring device (6) includes a hollow probe (61) and a temperature measuring module (62), and the temperature measuring module (62) is inserted into the probe (61).

2. 2. The microwave heating module according to claim 1, wherein a receiving hole (22) is opened in the center of the conductor rod (2), and the temperature measuring device (6) is inserted into the receiving hole (22).

3. A microwave heating module as described in claim 1, characterized in that the outer end of the probe (61) is closed.

4. 4. The microwave heating module of claim 3, wherein the temperature measurement module (62) includes a thermocouple or an optical fiber.

5. 4. Microwave heating module according to claim 3, characterized in that the probe (61) is in ohmic contact with the conductor rod (2).

6. The microwave supply device (3) is inserted into the cavity (1) through the supply hole (11) and contacts the inner wall surface of the cavity (1) and / or the surface of the conductor rod (2) to conduct electricity, thereby supplying microwaves into the cavity (1); A microwave heating module according to any one of claims 1 to 5, characterized in that a dielectric (4) is provided between the outer wall surface of the conductor rod (2) and the inner wall surface of the cavity (1).

7. 7. The microwave heating module according to claim 6, wherein the cavity (1) is made of a conductive metallic material.

8. 7. The microwave heating module according to claim 6, wherein the inner wall surface of the cavity (1) is coated with a first conductive layer (12).

9. 6. The microwave heating module according to claim 1, wherein the conductor rod (2) has a hollow or solid structure and an outer wall that is electrically conductive.

10. Microwave heating module according to any one of claims 1 to 5, characterized in that the conductor rods (2) are made of an electrically conductive material.

11. 6. The microwave heating module according to claim 1, wherein the outer wall surface of the conductor rod (2) is coated with a second conductive layer (21).

12. 7. The microwave heating module according to claim 6, wherein the microwave supply device (3) is straight and has one end in contact with the side wall surface of the conductor rod (2) for electrical conduction.

13. 7. The microwave heating module according to claim 6, wherein the microwave supply device (3) is L-shaped and one end of the microwave supply device is in electrical contact with the bottom surface of the cavity (1).

14. 7. The microwave heating module of claim 6, wherein the dielectric (4) is lower than the conductor rods (2), aligned with the conductor rods (2), higher than the conductor rods (2) and lower than the cavity (1), aligned with the height of the cavity (1), or higher than the cavity (1).

15. 15. The microwave heating module according to claim 14, wherein the dielectric body (4) is provided on its inner periphery with a positioning portion that protrudes toward the center.

16. 16. The microwave heating module according to claim 15, wherein the positioning portions are ridges and ribs.

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

18. A microwave heating module as described in any one of claims 1 to 5, characterized in that the cavity (1) is further provided with a fixing device (5) for fixing an aerosol-forming substrate (7), and the material of the fixing device (5) is capable of transmitting microwaves.

19. 19. Microwave heating module according to claim 18, characterized in that the material of the fixing device (5) has a dielectric loss tangent of less than 0.

1.

20. 19. Microwave heating module according to claim 18, characterized in that the material of the pre-fixing device (5) is plastic.

21. An atomization device comprising the microwave heating module according to any one of claims 1 to 5.

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