Heating body and heating atomization device

Abstract

A heating body (10), comprising: a heating assembly (11), which comprises a central tube (100), a first electrode (200) and a second electrode (300), wherein the central tube (100) is made of an insulating material and is provided with a tube cavity (150), the first electrode (200) and the second electrode (300) are both arranged on the central tube (100), and the first electrode (200) and the second electrode (300) can generate a plasma arc in the tube cavity (150) of the central tube (100) therebetween; and an outer sleeve (12), which is sleeved on the heating assembly (11) and is used for being in contact with an atomization medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heating atomization device technologies, and in particular, to a heating body and a heating atomization device including the heating body.BACKGROUND

[0002] Heating atomization devices are usually used to heat solid atomization media so that the atomization media is atomized by heating without burning to form an aerosol that can be inhaled by a user. A heating body of a conventional heating atomization device usually adopts a resistance heating mode or electromagnetic induction heating mode to heat to atomize the atomization media. However, the above heating modes usually has a defect of a long preheating waiting time, which affects a heating speed of the atomization media.SUMMARY

[0003] A technical problem solved by the present application is how to increase a heating speed of a heating body.

[0004] A heating body includes a heating assembly and an outer sleeve. The heating assembly includes a central tube, a first electrode, and a second electrode. The central tube is made of an insulating material and is provided with a tube cavity. The first electrode and the second electrode are both arranged on the central tube. A plasma arc is formed in the tube cavity of the central tube between the first electrode and the second electrode. The outer sleeve is sleeved on the heating assembly and is configured to be in contact with an atomization medium.

[0005] A heating atomization device includes any heating body described above.

[0006] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to better describe and illustrate the embodiments and / or examples of inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered as limiting the scope of any of the present application, the embodiments and / or examples currently described, and best modes of the present application currently understood. FIG. 1 is a schematic perspective view of a heating body provided in a first embodiment. FIG. 2 is a schematic sectional view of the heating body shown in FIG. 1. FIG. 3 is a schematic perspective, exploded sectional view of the heating body shown in FIG. 1. FIG. 4 is a schematic perspective view of the heating body provided in a first embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0008] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the application of the present application more thoroughly and comprehensively understood.

[0009] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on another element or centered elements may also be present. When an element is referred to be "connected to" another element, it may be directly connected to another element or centered elements may also be present. The terms "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not meant to be the only implementations.

[0010] Referring to FIG. 1, FIG. 2 and FIG. 3, a heating atomization device provided in an embodiment of the present application includes a power supply and a heating body 10. The heating body 10 can be inserted into an atomization medium. The power supply supplies power to the heating body 10, so that the heating body 10 can convert electrical energy into thermal energy, which finally enables the atomization medium to absorb heat of the heating body 10 and to be atomized to form an aerosol. The heating body 10 includes a heating assembly 11 and an outer sleeve 12. The outer sleeve 12 is sleeved on the heating assembly 11. When the heating body 10 is inserted into the atomization medium, the outer sleeve 12 is in direct contact with the atomization medium. The heating assembly 11 includes a central tube 100, a first electrode 200, and a second electrode 300. When two poles of the power supply supply power to the first electrode 200 and the second electrode 300, respectively, a plasma arc can be formed between the first electrode 200 and the second electrode 300. The plasma arc is located in the central tube 100, and heat generated by the plasma arc will be transmitted to the atomization medium by radiation.

[0011] In some embodiments, the central tube 100 may be substantially shaped as a circular tube, and a cross section of the central tube 100 is circular. Of course, the cross section of the central tube 100 may also be an ellipse or a regular polygon, etc. The central tube 100 has a top surface 120, a bottom surface 130, and a side circumferential surface 110. The top surface 120 and the bottom surface 130 may be planes horizontally arranged and perpendicular to an axial direction the central tube 100, and the side circumferential surface 110 is a vertical surface extending along the axial direction of the central tube 100. The top surface 120 and the bottom surface 130 may be understood as two end surfaces in the axial direction of the central tube 100, and the top surface 120 and the bottom surface 130 are connected to opposite two ends of the side circumferential surface 110, respectively, so that the side circumferential surface 110 is arranged around a periphery of the top surface 120 and the bottom surface 130. The center tube 100 is internally provided with a tube cavity 150 extending along its axial direction, and the tube cavity 150 extends through both the top surface 120 and the bottom surface 130. Apparently, the tube cavity 150 has openings 140 on both the top surface 120 and the bottom surface 130. The center tube 100 is made of an insulating material and has high heat resistance. For example, the center tube 100 can be made of dense ceramic materials including sodium oxide and / or zirconium oxide, such that the center tube 100 has high insulation and structural strength. A wall thickness of the center tube 100 ranges from 0.4mm to 1mm, for example, the wall thickness can range from 0.4mm to 0.6mm, and a specific value of the wall thickness can be 0.4mm, 0.5mm or 0.6mm, etc. Through this configuration, the plasma arc can be effectively prevented from breaking through a wall of the center tube 100. An inner diameter of the central tube 100 ranges from 0.3mm to 0.8mm. A specific value of the inner diameter of the central tube 100 can be 0.3mm, 0.6mm or 0.8mm, etc. In this way, outer diameters of entire central tube 100 and the heating body 10 can be reasonably reduced to achieve a miniaturized configuration of the heating body 10.

[0012] In some embodiments, the second electrode 300 is generally of a columnar structure, and a part of the second electrode 300 is inserted into the tube cavity 150 from an opening 140 on the bottom surface 130 of the central tube 100, so that the second electrode 300 extends through the tube cavity 150. The second electrode 300 can be made of a conductive and heat-resistant material. For example, the second electrode 300 can be made of copper, tungsten and its alloy, as well as carbon fiber, etc. An outer diameter of a section of the second electrode 300 located in the tube cavity 150 can range from 0.2mm to 0.5mm, for example, its outer diameter can be 0.2mm, 0.3mm or 0.5mm, etc.

[0013] Referring to FIG. 2 and FIG. 3, in some embodiments, the first electrode 200 includes a first covering portion 210 and a second covering portion 220. The first covering portion 210 and the second covering portion 220 can be made of the same material. For example, the first covering portion 210 and the second covering portion 220 can be made of an infrared semiconductor material such as silicon carbide, so that the first covering portion 210 and the second covering portion 220 have infrared radiation properties, and the heat on the first covering portion 210 and the second covering portion 220 can be radiated outward through infrared rays. The first covering portion 210 and the second covering portion 220 can be attached to the central tube 100 by coating. The first covering portion 210 is attached to the side circumferential surface 110, and the second covering portion 220 covers the top surface 120. The second covering portion 220 can cover the entire top surface 120, so that the second covering portion 220 covers the opening 140 on the top surface 120. When the power source supplies power to the first covering portion 210 and the second electrode 300, since the second covering portion 220 is electrically connected to the first covering portion 210, a plasma arc located in the tube cavity 150 of the central tube 100 will be generated between the second covering portion 220 and the second electrode 300. The power source applied to the first electrode 200 and the second electrode 300 can range from 10kV to 20kV, for example, a specific voltage value can be 10kV, 15kV or 20kV, so that a length of the plasma arc can range from 4mm to 6mm. To ensure effective formation of the plasma arc, a spacing A between the second covering portion 220 and the second electrode 300 in the tube cavity 150 can be greater than the length of the plasma arc. A thickness of the second covering portion 220 may be greater than a thickness of the first covering portion 210. The thickness of the second covering portion 220 may also be understood as a length occupied by the second covering portion 220 in the axial direction of the central tube 100. For example, the thickness of the second covering portion 220 may range from 0.1mm to 1mm. The specific value of the thickness may be 0.1mm, 0.5mm or 1mm, etc. This can effectively prevent the plasma arc in the tube cavity 150 from breaking through the second covering portion 220, thereby preventing the plasma arc from leaking out of the tube cavity 150.

[0014] The first electrode 200 may further include a filling portion 230, which is made of the same material as that of the first covering portion 210 and the second covering portion 220. The filling portion 230 is substantially columnar, and is connected to the second covering portion 220, and the filling portion 230 is accommodated in the tube cavity 150. In fact, in a process of forming the second covering portion 220 by coating, a portion of slurry may be first injected into the opening 140 of the tube cavity 150 adjacent to the top surface 120, and then a layer of slurry may be coated on the top surface 120. The slurry in the tube cavity 150 is cured to form the filling portion 230, and the slurry on the top surface 120 is cured to form the second covering portion 220. By providing the filling portion 230, an ion arc may be further prevented from breaking through the second covering portion 220. Of course, a spacing Abetween the filling portion 230 and the second electrode 300 in the tube cavity 150 is also greater than the length of the plasma arc to ensure the effective formation of the plasma arc. Since the first covering portion 210 and the second covering portion 220 are formed by coating slurry, in order to ensure uniformity and continuity of the first covering portion 210 and the second covering portion 220, a rounding 160 or chamfer is provided on an end of the central tube 100, so that the fillet rounding or chamfer is located between the side circumferential surface 110 and the top surface 120.

[0015] Referring to FIG. 4, in some embodiments, the first covering portion 210 and the second covering portion 220 can be made of different materials. The first covering portion 210 is attached to the side circumferential surface 110 by coating, and the second covering portion 220 as a structural member can be processed and formed in advance, and then fixed to the top surface 120 by gluing or other methods, so that the second covering portion 220 covers the opening 140 on the top surface 120. The length occupied by the second covering portion 220 in the axial direction of the central tube 100 is greater than the thickness of the first covering portion 210, which can be simply understood as a length of the second covering portion 220 in an axial direction is greater than the thickness of the first covering portion 210, so as to prevent the plasma arc from breaking through the second covering portion 220. Of course, the second covering portion 220 of this form can also be connected to columnar filling portion 230, so that the filling portion 230 is accommodated in the tube cavity 150.

[0016] Since the plasma arc is formed between the second covering portion 220 and the second electrode 300, or between the filling portion 230 and the second electrode 300, and the second covering portion 220 is located on a top surface 120 of the central tube 100, and the filling portion 230 is located in the tube cavity 150, it can effectively prevent the second covering portion 220 and the second electrode 300 from occupying an extra space in a radial direction of the central tube 100, thereby reasonably reducing an outer diameter of entire heating body 10 and realizing miniaturization design of the heating body 10. At the same time, it is also conducive to ensuring that temperatures of the heating body 10 is consistent at various locations in a circumferential direction, improving uniformity of the temperatures of the entire heating body 10, and realizing uniform heating of the atomization medium.

[0017] In some embodiments, the first covering portion 210 includes an inner section 212 and an outer section 211, and ends of the inner section 212 and the outer section 211 are connected to each other. The inner section 212 is located inside the outer sleeve 12, and the outer section 211 is located outside the outer sleeve 12. It can be understood that the inner section 212 is covered by the outer sleeve 12 and hidden between the outer sleeve 12 and the central tube 100, and the outer section 211 is not covered by the outer sleeve 12 and exposed outside the outer sleeve 12. For the side circumferential surface 110 of the central tube 100, a part of the side circumferential surface 110 located inside the outer sleeve 12 is completely covered by the inner section 212, so as to ensure that the temperatures of the heating body 10 at various locations in the circumferential direction remains consistent, thereby improving the uniformity of the temperatures of the entire heating body 10. A part of the side circumferential surface 110 outside the outer sleeve 12 is partially covered by the outer section 211, and a thickness of the outer section 211 is less than a thickness of the inner section 212. In this way, on the one hand, a hollow structure can be formed in the outer section 211, reducing probability of heat on the central tube 100 being transferred to the outer section 211, ensuring that the heat of the heating body 10 is transferred to the atomization medium as much as possible, and improving energy utilization rate of the heating body 10. On the other hand, by providing different hollow structures, resistivity of the entire first electrode 200 can be changed in a large range, and the hollow structure can also be used to connect other resistors in series, thereby changing discharge characteristics of the first electrode 200, effectively controlling intensity and shape of the plasma arc, and finally adjusting heating performance of the heating body 10. On the other hand, the outer section 211 is conducive to forming an electrical connection relationship with the power supply, thereby improving assembly efficiency of the heating body 10.

[0018] During operation, when power is applied to the first electrode 200 and the second electrode 300, the first electrode 200 and the second electrode 300 will form a plasma arc located in the tube cavity 150. A temperature of the plasma arc is relatively high. When the central tube 100 absorbs heat of the plasma arc, a temperature of the central tube 100 can reach 400°C to 800°C. The heat generated by the plasma arc will be radiated to the atomization medium through the outer sleeve 12. In view of high temperature of the plasma arc, preheating time of the atomization medium is greatly shortened to within 20 seconds, for example, it can be shortened to within 10 seconds, etc., to ensure that the atomization medium can be atomized to form an aerosol within a short time when the user inhales, and finally improve a heating speed of the entire heating body 10.

[0019] Referring to FIG. 2, in some embodiments, the heating assembly 11 further includes an infrared radiation film 400, which can cover both the first covering portion 210 and the second covering portion 220 at the same time, or only covers the first covering portion 210. When the infrared radiation film 400 absorbs heat, the heat is radiated to the atomization medium through infrared rays. A direction perpendicular to an axial direction of the central tube 100 defined as a reference direction can be understood as the radial direction of the central tube 100, a gap B is formed between the outer sleeve 12 and entire heating assembly 11 in the radial direction of the central tube 100, and a width of the gap B can range from 0.05mm to 0.3mm. For example, a specific value of the gap B can be 0.05mm, 0.1mm or 0.3mm. By providing the gap B, a non-contact relationship is formed between the outer sleeve 12 and the heating assembly 11, thus effectively preventing heat on the heating assembly 11 from being directly transmitted to the outer sleeve 12 by contact conduction, and ensuring that a temperature of the outer sleeve 12 is lower than that of the heating assembly 11. A wall thickness of the outer sleeve 12 ranges from 0.3mm to 0.5mm, and an outer diameter of the outer sleeve 12 ranges from 2.2mm to 3.5mm, so that the outer diameter of the outer sleeve 12 can be reasonably reduced, thereby realizing the miniaturization design of the heating body 10. The outer sleeve 12 can be made of quartz material, and the outer sleeve 12 has a small absorptivity and reflectivity to infrared rays, so that the outer sleeve 12 has a strong transmittance to infrared rays, reducing heat absorbed by the outer sleeve 12 in the infrared rays. In this way, the temperature of the outer sleeve 12 does not exceed 350°C, ensuring that most of heat generated by the heating assembly 11 is radiated to the atomization medium through infrared rays. In view of the high absorptivity of the atomization medium to infrared rays, the atomization medium absorbs heat and atomizes in a short time, thereby increasing the heating speed of the heating body 10.

[0020] The technical features of the above embodiments can be randomly combined. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all the combinations should be considered to be included within the scope of this specification.

[0021] The above-described embodiments only illustrate several embodiments of the present application, and the descriptions of which are relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be determined by the appended claims.

Claims

1. A heating body, comprising: a heating assembly comprising a central tube, a first electrode, and a second electrode, wherein the central tube is made of an insulating material and is provided with a tube cavity, the first electrode and the second electrode are both arranged on the central tube, and a plasma arc is formed in the tube cavity of the central tube between the first electrode and the second electrode; and an outer sleeve sleeved on the heating assembly and configured to be in contact with an atomization medium.

2. The heating body according to claim 1, wherein the first electrode comprises a first covering portion and a second covering portion connected to each other, the central tube has a side circumferential surface and a top surface, the side circumferential surface extends along an axial direction of the central tube and is arranged around the top surface, the tube cavity has an opening on the top surface, the first covering portion is attached to the side circumferential surface, and the second covering portion is attached to the top surface and covers the opening.

3. The heating body according to claim 2, wherein the first electrode further comprises a filling portion connected to the second covering portion and accommodated in the tube cavity.

4. The heating body according to claim 3, wherein the filling portion and the second covering portion are made of the same material.

5. The heating body according to claim 2, wherein the first covering portion and the second covering portion are made of the same material or different materials, and a length of the second covering portion in an axial direction of the central tube is greater than a thickness of the first covering portion.

6. The heating body according to claim 2, wherein the first covering portion and the second covering portion are both made of an infrared semiconductor material.

7. The heating body according to claim 2, wherein the first covering portion comprises an inner section and an outer section connected to each other, the inner section is located inside the outer sleeve, and the outer section is located outside the outer sleeve; a part of the side circumferential surface located inside the outer sleeve is completely covered by the inner section, a part of the side circumferential surface located outside the outer sleeve is partially covered by the outer section, and a thickness of the outer section is less than a thickness of the inner section.

8. The heating body according to claim 7, wherein the outer section is provided with a hollow structure.

9. The heating body according to claim 2, further comprising an infrared radiation film, wherein the infrared radiation film covers the first covering portion; or the infrared radiation film covers the first covering portion and the second covering portion.

10. The heating body according to claim 1, wherein the second electrode is columnar and extends through the tube cavity.

11. The heating body according to claim 10, wherein the second electrode is made of copper, tungsten or carbon fiber.

12. The heating body according to claim 10, wherein an outer diameter of a part of the second electrode located in the tube cavity ranges from 0.2mm to 0.5mm.

13. The heating body according to claim 1, wherein a cross section of the central tube is circular, and the central tube is made of a dense ceramic material comprising sodium oxide or zirconium oxide.

14. The heating body according to claim 1, wherein a direction perpendicular to an axial direction of the central tube is defined as a reference direction, a gap is formed between the outer sleeve and the heating assembly in the reference direction, and a width of the gap ranges from 0.05mm to 0.3mm.

15. The heating body according to claim 1, wherein the outer sleeve is made of quartz material, a wall thickness of the outer sleeve ranges from 0.3mm to 0.5mm, and an outer diameter of the outer sleeve ranges from 2.2mm to 3.5mm.

16. The heating body according to claim 1, wherein a wall thickness of the central tube ranges from 0.4mm to 1mm, and an inner diameter of the central tube ranges from 0.3mm to 0.8mm.

17. The heating body according to claim 1, wherein a voltage applied to the first electrode and the second electrode ranges from 10kV to 20kV18. The heating body according to claim 1, wherein a length of the plasma arc ranges from 4mm to 6mm, and a distance between the first electrode and the second electrode in the tube cavity is greater than the length of the plasma arc.

19. The heating body according to claim 1, wherein a chamfer or rounding is provided on an end of the central tube connected to the first electrode.

20. A heating atomization device, comprising the heating body of any one of claims 1 to 19.

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