EP-4035541-B1 - HEATING DEVICE COMPRISING HEATING ELEMENT AND HIGH-FREQUENCY HEATING ASSEMBLY

Inventors

• LIU, TUANFANG

Dates

Publication Date

20260506

Application Date

20210831

Claims (9)

1. A heating device, comprising a heating element (14) and a high-frequency heating assembly; wherein in a power-on state, the heating element and the high-frequency heating assembly operate to generate heat and heat tobacco materials in the heating device to produce smoke or vapor; characterised in that : the high-frequency heating assembly comprises an induction coil (17) and a container (21) for holding the tobacco materials: the container is disposed in the induction coil; the heating element is disposed on the container so that the tobacco materials are covered in the container; the heating element comprises a main body provided with a plurality of through holes; and the heating element further comprises a plurality of heating wires (10) disposed in the plurality of through holes, respectively.
2. The heating device of claim 1, wherein the high-frequency heating assembly further comprises a variable-frequency power supply (5); an output terminal of the variable-frequency power supply is connected to an input terminal of the induction coil; when the variable-frequency power supply is energized, an alternating current is produced and passes through the induction coil, whereby an alternating magnetic field is produced; and the container in the alternating filed is heated and transfers the heat to the tobacco materials.
3. The heating device of claim 2, wherein the heating device further comprises a power supply board (7) for supplying power to the heating element; the plurality of heating wires each comprises a lead wire connected to the power supply board; and the power supply board is electrically connected to the variable-frequency power supply.
4. The heating device of claim 3, wherein the heating device further comprises a temperature probe (11); the temperature probe comprises a lead wire connected to the power supply board and a body disposed in the container.
5. The heating device of claim 1, wherein the container comprises a metal, or a non-metal comprising an embedded metal; and the container is circular, square, quadrilateral, or polygonal in shape.
6. The heating device of claim 1, wherein the heating device further comprises a socket (2-1).
7. The heating device of claim 5, wherein the heating device further comprises a top panel (1).
8. A hookah, comprising the heating device of claim 1 and a smoke filter connected to the heating device; when in use, the smoke produced by the heating device passes through the smoke filter and is inhaled by a smoker.
9. The hookah of claim 8, wherein the smoke filter comprises a water container (A), a smoke guide pipe (B), and an exhaust pipe (C); the smoke guide pipe comprises a first end connected to the heating device and a second end disposed below a liquid level of the water container; the exhaust pipe comprises a first end part communicating with a mouthpiece (D), and a second end part disposed above liquid level of the water container; when in use, the smoke flows through the smoke guide pipe, is filtered by water, flows out of the exhaust pipe, and enters into the mouthpiece.

Description

The disclosure relates to a heating device comprising a heating element and a high-frequency heating assembly. Conventional heating devices include a single high-frequency heating assembly to heat tobacco materials. Thus, the heating devices have low heating output, low work efficiencies, and low smoke or vapor amount. Hybrid heating devices with both a resistance heating element and a high-frequency induction heating assembly are described in documents CN 207 040 896 U, WO 2019/128551 A1, US 2020/060348 A1 and US 2020/337369 A1. The present invention is defined in the appended claim 1 and provides a heating device, comprising a heating element and a high-frequency heating assembly; in a power-on state, the heating element and the high-frequency heating assembly operate to generate heat and heat tobacco materials in the heating device to produce smoke or vapor. According to the claimed invention, the high-frequency heating assembly comprises an induction coil and a container for holding the tobacco materials, and the container is disposed in the induction coil. In a preferred embodiment, the high-frequency heating assembly further comprises a variable-frequency power supply; an output terminal of the variable-frequency power supply is connected to an input terminal of the induction coil; when the variable-frequency power supply is energized, an alternating current is produced and passes through the induction coil, whereby an alternating magnetic field is produced; and the container in the alternating filed is heated and transfer the heat to the tobacco materials. According to the claimed invention, the heating element is disposed on the container so that the tobacco materials are covered in the container. According to the claimed invention, the heating element comprises a main body provided with a plurality of through holes. According to the claimed invention, the heating element further comprises a plurality of heating wires disposed in the plurality of through holes, respectively. In a class of this embodiment, the heating device further comprises a power supply board for supplying power to the heating element; the plurality of heating wires each comprises a lead wire connected to the power supply board; and the power supply board is electrically connected to the variable-frequency power supply. In a class of this embodiment, the heating device further comprises a temperature probe; the temperature probe comprises a lead wire connected to the power supply board and a body disposed in the container; when the temperature is higher than a set point, the temperature probe provides protection against overheating. In a class of this embodiment, the container comprises a metal, or a non-metal comprising an embedded metal; and the container is circular, square, quadrilateral, polygonal or other irregular shape. In a class of this embodiment, the heating device further comprises a socket; and the socket is used to connect the heating device to an external adapter or an external battery pack. In a class of this embodiment, the heating device further comprises a top panel; and the power supply of the heating device is turned on by touching the top panel. In a class of this embodiment, the heating device further comprises a smoke filter; the smoke passes through the smoke filter and inhaled by a smoker. In a class of this embodiment, the smoke filter comprises a water container, a smoke guide pipe, and an exhaust pipe; the smoke guide pipe comprises a first end connected to the heating device and a second end disposed below a liquid level of the water container; the exhaust pipe comprises a first end part communicating with a mouthpiece, and a second end part disposed above liquid level of the water container; when in use, the smoke flows through the smoke guide pipe, filtered by water, flows out of the exhaust pipe, and enters into the mouthpiece. The disclosure provides a heating device, the tobacco materials of which can be heated by two different heating methods. Specifically, a high-frequency heating assembly and a heating element are disposed in the heating device to generate heat and heat the tobacco materials, which improves the work efficiency and increases the amount of the smoke. An external power supply is used to power the heating device, which reduces the overall volume of the heating device and is convenient to carry the heating device. The external power supply further solves the shortcomings of an internal power supply, such as large power consumption and long working hours. The heating device uses the high-frequency heating assembly and the heating element to generate heat and the amount of the smoke produced can be consumed by users. An inductive probe is disposed in the heating device to detect temperature changes and provide protection against overheating. FIG. 1 is an exploded view of a heating device according to one embodiment of the disclosure;FIG. 2 is a perspective view of a heating device