Electrically heated smoking system comprising at least two units

Abstract

An electrically heated smoking system is provided 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 mains power supply. The secondary unit also includes a secondary power supply and a secondary circuit. The secondary circuit is arranged to: control the power supply 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 raised to an operating temperature; in the smoking mode controlling the supply of electrical power to at least one heating element from the secondary power supply during which the temperature of the aerosol-forming substrate is maintained at substantially the operating temperature during said smoking mode; and controlling the primary power supply to charge the secondary power supply during the charging mode, Such that the secondary power supply has sufficient charge to raise the temperature of the aerosol-forming substrate to the operating temperature in the preheating mode and to maintain the temperature of the aerosol-forming substrate substantially at the operating temperature during the smoking mode. The electrically heated smoking system may optionally include a primary unit comprising a primary power supply and a primary electrical circuit. 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 electrically operated smoking systems have the disadvantage

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