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Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same

An induction heating device, aerosol technology, applied in aerosol delivery systems, the field of operating such aerosol delivery systems can solve the problem of difficulty in determining when a user inhales, etc., and achieve the effect of easy operation

Active Publication Date: 2016-02-03
PHILIP MORRIS PROD SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, it is also difficult to determine when the user inhales the cigarette during the smoking process.

Method used

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  • Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same
  • Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same
  • Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same

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Embodiment Construction

[0093] exist figure 1 , schematically illustrates the general heating principle explaining the invention. exist figure 1 A helically wound cylindrical inductor coil L2 is schematically shown in , having a rectangular shape and defining the inner volume of part or all of the aerosol-forming substrate 20 in which the smoking article 2 is disposed, the aerosol-forming substrate including the susceptor 21 . A smoking article 2 comprising an aerosol-forming substrate 20 with a susceptor 21 is schematically presented in enlarged cross-sectional detail, shown separately in figure 1 right-hand side of . As already mentioned, the aerosol-forming substrate 20 of the smoking article 2 may be a tobacco-filled solid substrate, however, is not limited thereto.

[0094] In addition, in figure 1 , the magnetic field within the inner volume of the inductor coil L2 is composed of many magnetic field lines B at a particular moment L Schematic indication, due to the alternating current i flo...

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Abstract

An inductive heating device (1) for heating an aerosol-forming substrate (20) comprising a susceptor (21) comprises: a device housing (10), a DC power source (11) for providing a DC supply voltage (VDC) and a DC current (IDC), a power supply electronics (13) comprising a DC / AC converter (132) comprising an LC load network (1323) comprising a series connection of a capacitor (C2) and an inductor (L2) having an ohmic resistance (RCoil), a cavity (14) in the device housing (10) for accommodating a portion of the aerosol-forming substrate (20) to inductively couple the inductor (L2) to the susceptor (21). The power supply electronics (13) further comprises a microcontroller (131) programmed to determine from the DC supply voltage (VDC) and from the DC current (IDC) an apparent ohmic resistance (Ra), and from the apparent ohmic resistance (Ra) the temperature (T) of the susceptor (21). It is further programmed to monitor changes in the apparent ohmic resistance (Ra) and to detect a puff when a decrease of the apparent ohmic resistance (Ra) is determined which is indicative of a temperature decrease of the susceptor (21) during a user inhalation.

Description

technical field [0001] The present invention relates to an induction heating device for heating an aerosol-forming substrate. The invention also relates to an aerosol delivery system comprising such an induction heating device. The invention also relates to methods of operating such aerosol delivery systems. Background technique [0002] Prior art aerosol delivery systems are known comprising an aerosol-forming substrate, usually a tobacco-containing plug. To heat the tobacco plug to a temperature at which volatile components that can form an aerosol are released, a heating element such as a heating blade (usually made of metal) is inserted into the tobacco plug. The temperature of the heating element in direct contact with the aerosol-forming substrate (tobacco plug) was determined to represent the temperature of the aerosol-forming substrate. The temperature of the heater chip is calculated using the known relationship between the ohmic resistance of the heater chip and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24F47/00A24F40/20A24F40/465A24F40/53
CPCH05B6/06H05B6/108H05B6/36H05B2206/023A24F40/20A24F40/465A24F40/53H03F3/2176A24B15/167H05B1/0244H05B6/04H05B6/105H05B2203/021H05B2206/02H05B1/0252A24F40/57A24F40/90A24F40/51A61M15/06A24F40/46
Inventor O·福尔萨O·米洛诺夫I·N·奇诺维科
Owner PHILIP MORRIS PROD SA
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