An easy-to-clean cup heating device

Abstract

The present invention discloses an easy-to-clean cup-shaped heating device, belonging to the field of microwave heating, comprising a shielded cavity, a heating unit, and a heating unit energy input portion; the heating unit and the heating unit energy input portion are disposed within the shielded cavity; the heating unit energy input portion connects the heating unit and a microwave source, providing a reverse voltage to the heating unit. The heating unit is composed of two cylindrical dielectric substrates and two serpentine metal radiation layers, with each metal radiation layer being fed separately to avoid mutual cancellation between the two metal radiation patches. The device of the present invention can be used for heating electronic cigarettes. Its advantages are that it utilizes the principle of antenna radiation heating, has few structural size restrictions, offers high design flexibility, is not easily damaged, and is easy to clean.

Description

Technical Field

[0001] The invention belongs to the field of microwave heating devices and relates to an easy-to-clean cup-type electronic cigarette microwave heating device. Background Art

[0002] Current microwave-heated e-cigarettes typically use a resonant cavity heating structure. However, commercial microwave heating frequencies are currently limited to 2.45 GHz and 915 MHz, which limits the size of the resonant cavity and creates uneven electric field distribution within the cavity, leading to uneven heating. Furthermore, microwave needle-type e-cigarettes require a cartridge to be inserted for heating. This frequent insertion and removal of cartridges can easily damage the microwave needle, which is also easily contaminated with tobacco oil and extremely difficult to clean. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an easy-to-clean cup-type heating device, which can achieve rapid and uniform heating while avoiding damage to the microwave needle caused by frequent insertion of microwave needle-type electronic cigarettes and is more convenient to clean.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A cup-type heating device that is easy to clean includes a shielded cavity, a heating unit, and a heating unit energy input portion; the heating unit and the heating unit energy input portion are arranged inside the shielded cavity; the heating unit energy input portion connects the heating unit and a microwave source to provide a reverse voltage to the heating unit.

[0006] Furthermore, the shielding cavity is a cylindrical cup-shaped or cylindrical cup-type mesh structure, and its material is metal material.

[0007] Furthermore, the heating unit is composed of an outer cylindrical dielectric substrate, a radiation layer, and an inner cylindrical dielectric substrate.

[0008] Furthermore, the radiation layer is two serpentine metal strips extending in the axial direction and conforming to the surface of the inner cylindrical dielectric substrate.

[0009] Furthermore, the outer cylindrical dielectric substrate is a hollow cylinder, the inner cylindrical dielectric substrate is also a hollow cylinder, and the radius of the inner cylindrical dielectric substrate is not greater than that of the outer cylindrical dielectric substrate.

[0010] Furthermore, the outer cylindrical dielectric substrate and the inner cylindrical dielectric substrate are both made of high-temperature resistant materials, such as ceramics.

[0011] Furthermore, the heating unit operates within the ISM frequency band.

[0012] Furthermore, the energy input part of the heating unit is a double-wire structure with a characteristic impedance of 50Ω. The front end of the energy input part of the heating unit is connected to the microwave source, and the rear end of the energy input part of the heating unit is connected to the heating unit through two metal columns.

[0013] Furthermore, the energy input portion of the heating unit is composed of two parallel feed lines, a Rogers dielectric substrate, a ground plane, and a metal column.

[0014] Furthermore, in the energy input portion of the heating unit, two parallel feed lines are printed on a Rogers dielectric substrate, the bottom surface of the Rogers dielectric substrate is copper-clad as a ground plane, and each of the two parallel feed lines has a metal column for connecting to the heating unit.

[0015] The present invention has the following beneficial effects:

[0016] (1) The microwave heating antenna used in the present invention uses two serpentine metal strips conformally on the inner cylindrical dielectric substrate. The two metal strips respectively heat the unit energy input, avoiding the mutual cancellation caused by the reverse current between the two metal radiation layers and improving the heating efficiency.

[0017] (2) Compared with the microwave needle-type electronic cigarette, the present invention has a cup-shaped cavity structure, uses metal strips to radiate energy, is not easily damaged, and is easy to clean.

[0018] (3) Compared with the traditional resonant cavity electronic cigarette, the working principle of the present invention is antenna radiation rather than cavity resonance. Its size is not limited by the heating frequency, and the design is more flexible and free.

[0019] The objects, features and advantages of the present invention will be further described below with reference to the accompanying drawings in conjunction with the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the easy-to-clean cup heating device of the present invention.

[0021] Figure 2 It is an exploded diagram of the heating unit adopted in the present invention.

[0022] Figure 3 It is a schematic diagram of the energy input part of the heating unit adopted in the present invention. DETAILED DESCRIPTION

[0023] like Figure 1As shown in the cross-sectional view, the easy-to-clean cup-type heating device of this embodiment includes a shielding cavity 1, a heating unit 2, and a heating unit energy input part 3. The heating unit 2 guides the microwave energy distribution, concentrates the energy inside the smoke pellet, and provides energy and spatial distribution for heating the smoke pellet; the shielding cavity 1 is made of metal material, is cylindrical and cup-shaped, reflects microwave energy to form a standing wave form, and the heating unit 2 and the heating unit energy input part 3 are arranged inside it.

[0024] like Figure 2 As shown in the exploded view of the heating unit 2, the heating unit comprises an outer cylindrical dielectric substrate 21, a radiating layer 22, and an inner cylindrical dielectric substrate 23. The radiating layer 22 comprises two serpentine metal strips extending axially and conforming to the surface of the inner cylindrical dielectric substrate 23. The outer cylindrical dielectric substrate 23 is a hollow cylinder, and the inner cylindrical dielectric substrate 23 is also a hollow cylinder. The radius of the inner cylindrical dielectric substrate 23 is no larger than that of the outer cylindrical dielectric substrate 21. Both the outer cylindrical dielectric substrate 21 and the inner cylindrical dielectric substrate 23 are made of ceramic. The outer cylindrical dielectric substrate 21 has a thickness of 0.4 mm and a radius of 4.4 mm, while the inner cylindrical dielectric substrate 23 has a thickness of 0.5 mm and a radius of 4 mm. The heating unit 2 operates within a frequency range of 2.45 ± 0.05 GHz.

[0025] like Figure 3 As shown in the schematic diagram of the heating unit energy input section, the heating unit energy input section 3 consists of two parallel feed lines 32, each 10 mm long and with a characteristic impedance of 50Ω, printed on a 0.5 mm thick low-loss Rogers dielectric substrate 33. These feed lines are then soldered to a ground plane 34, the bottom surface of which is copper-clad. The two-wire structure features two 0.6 mm high metal posts 31, which connect the heating unit 2 to the microwave source and provide reverse voltage to the heating unit. The heating unit energy input section 3 is a two-wire structure, with the front end connected to the microwave source and the rear end connected to the heating unit 2 via two metal posts 31.

[0026] The easy-to-clean cup-type heating device of the present invention adopts microwave heating technology. By applying an alternating electromagnetic field to the cigarette cartridge, polar molecules such as water molecules in the cigarette cartridge rotate at high speed with the external electromagnetic field. Friction between the molecules generates high temperature, thereby heating the cigarette cartridge, thereby atomizing and generating smoke, and improving heating efficiency. Compared with the microwave needle-type electronic cigarette, the present invention has a cup-shaped cavity structure and uses metal strips to radiate energy, which is not easy to damage and easier to clean.

[0027] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical teachings disclosed in the present invention without departing from the present invention, and these variations and combinations are still within the scope of protection of the present invention.

Claims

1. An easy-to-clean cup heating device, characterized in that: The invention comprises a shielding cavity (1), a heating unit (2), and a heating unit energy input portion (3); the heating unit (2) and the heating unit energy input portion (3) are arranged inside the shielding cavity (1); the heating unit energy input portion (3) is connected to the heating unit (2) and a microwave source, and provides a reverse voltage to the heating unit (2); The heating unit (2) is composed of an outer cylindrical dielectric substrate (21), a radiation layer (22), and an inner cylindrical dielectric substrate (23); The radiation layer (22) is composed of two serpentine metal strips extending in the axial direction and conforming to the surface of the inner cylindrical dielectric substrate (23); The heating unit energy input part (3) is a double-wire structure with a characteristic impedance of 50Ω. The front end of the heating unit energy input part is connected to the microwave source, and the rear end of the heating unit energy input part is connected to the heating unit (2) via two metal columns. The heating unit energy input part (3) is composed of two parallel feed lines (32), a Rogers dielectric substrate (33), a ground plane (34), and a metal column (31); The heating unit energy input portion (3) comprises two parallel feed lines (32) printed on a Rogers dielectric substrate (33), the bottom surface of the Rogers dielectric substrate (33) being copper-clad as a grounding surface (34), and the two parallel feed lines (32) each having a metal post (31) for connecting to the heating unit (2).

2. The easy-to-clean cup heating device according to claim 1, characterized in that: The shielding cavity (1) is a cylindrical cup-shaped or cylindrical cup-type mesh structure, and its material is a metal material.

3. The easy-to-clean cup heating device according to claim 1, characterized in that: The outer cylindrical dielectric substrate (21) is a hollow cylinder, the inner cylindrical dielectric substrate (23) is also a hollow cylinder, and the radius of the inner cylindrical dielectric substrate (23) is not greater than that of the outer cylindrical dielectric substrate (21).

4. The easy-to-clean cup heating device according to claim 1, characterized in that: The outer cylindrical dielectric substrate (21) and the inner cylindrical dielectric substrate (23) are both made of high-temperature resistant materials.

5. The easy-to-clean cup heating device according to claim 1, characterized in that: The heating unit (2) operates within the ISM frequency band.

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