An electrically heated smoking system comprising at least two units

Abstract

There is provided an electrically heated smoking system comprising a secondary unit capable of receiving a smoking article having an aerosol-forming substrate. The secondary unit comprises at least one heating element and an interface for connection to a primary power supply. The secondary unit further comprises a secondary power supply and secondary circuitry.; The secondary circuitry is arranged to control supply of electrical power from the secondary power supply to the at least one heating element in a pre-heating mode during which the temperature of the aerosol-forming substrate is increased to an operating temperature, to control supply of electrical power from the secondary power supply to the at least one heating element in a smoking mode, during which the temperature of the aerosol-forming substrate is maintained at substantially the operating temperature, and to control charging of the secondary power supply by the primary power supply, in a charging mode,; so that the secondary power supply has sufficient charge to increase the temperature of the aerosol-forming substrate to the operating temperature in the pre-heating mode and to maintain the temperature of the aerosol-forming substrate at substantially the operating temperature during the smoking mode. The electrically heated smoking system may optionally include a primary unit comprising the primary power supply and primary circuitry. By dividing the power supply between the primary unit and the secondary unit, the secondary unit can be made smaller and more convenient for the user.

Description

technical field [0001] The present invention relates to an electrically heated smoking system having a unit for receiving smoking articles, wherein the unit comprises a secondary power supply and the unit is connectable to a main power supply. Background technique [0002] Several prior art documents disclose an electrically operated smoking system which has several advantages. One advantage is that the electrically operated smoking system significantly reduces sidestream smoke while allowing the smoker to selectively activate the smoking system during the smoking experience. Prior art electrically operated smoking systems typically include: a housing for receiving a smoking article; a heating element for generating an aerosol; a power supply and necessary electronic circuitry. The circuit may be activated manually or by inserting a cigarette into the housing, and may limit operation of the heating element to a predetermined period of time. [0003] However, some of the pr...

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Problems solved by technology

[0003] However, some of the prior art electri...

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