An atomiser and an aerosol-generating system comprising an atomiser

An atomiser for an electrically heatable aerosol-generating system, comprising:

• an atomiser housing defining an air inlet and an air outlet;
• a reservoir portion configured to contain a liquid aerosol-forming substrate;
• an airflow passage extending in a longitudinal direction between the air inlet and the air outlet, the atomiser housing defining the reservoir portion and the airflow passage;
• a planar fluid-permeable heating element disposed between the airflow passage and the reservoir portion so that one side of the planar fluid-permeable heating element is in fluidic communication with the airflow passage and an opposite side of the planar fluid-permeable heating element is in fluidic communication with liquid in the reservoir portion, wherein the planar fluid-permeable heating element extends in the longitudinal direction;
• and
• a heater mounting portion on which the planar fluid-permeable heating element is supported, the heater mounting portion being received in the atomiser housing and disposed between the reservoir portion and the airflow passage so that fluid can pass from the reservoir portion to the airflow passage through the planar fluid-permeable heating element.

An electrically heatable aerosol-generating system configured such that a user can puff to withdraw an aerosol, comprising:

• an atomiser comprising
• an atomiser housing defining an air inlet and an air outlet,
• a reservoir portion configured to contain a liquid aerosol-forming substrate,
• an airflow passage extending in a longitudinal direction between the air inlet and the air outlet,
• a planar fluid-permeable heating element disposed between the airflow passage and the reservoir portion so that one side of the planar fluid-permeable heating element is in fluidic communication with the airflow passage and an opposite side of the planar fluid-permeable heating element is in fluidic communication with liquid in the reservoir portion, wherein the planar fluid-permeable heating element is elongate and has a length and a width and a thickness, the length being in the longitudinal direction and being greater than the width, and the width being greater than the thickness, and
• a heater mounting portion on which the planar fluid-permeable heating element is supported, the heater mounting portion being received in the atomiser housing and disposed between the reservoir portion and the airflow passage so that fluid can pass from the reservoir portion to the airflow passage through the planar fluid-permeable heating element;
• and
• a device portion comprising
• a power supply, and
• control circuitry connected to the power supply and being engaged with the atomiser to allow for a supply of power from the power supply to the planar fluid-permeable heating element,
• wherein device portion is configured to supply power to the planar fluid-permeable heating element to supply a first power to the planar fluid-permeable heating element, or to supply a power sufficient to maintain at least the planar fluid-permeable heating element at a first temperature or within a first temperature range, between user puffs.

A cartridge for an aerosol-generating system, comprising:

• an cartridge housing defining an air inlet and an air outlet;
• an aerosol-forming substrate;
• an airflow passage extending in a longitudinal direction between the air inlet and the air outlet;
• and
• a heater assembly comprising a planar fluid-permeable heating element, disposed between the airflow passage and the aerosol-forming substrate so that one side of the planar fluid-permeable heating element is in fluidic communication with the airflow passage and an opposite side of the planar fluid-permeable heating element is in fluidic communication with the aerosol forming substrate;
• and
• a heater mounting portion on which the planar fluid-permeable heating element is supported, the heater mounting portion being received in the atomiser housing and disposed between a reservoir portion and the airflow passage so that fluid can pass from the reservoir portion to the airflow passage through the planar fluid-permeable heating element,
• wherein the cartridge housing comprises a wall extending in the longitudinal direction and a bore in the wall through which the heater assembly is received.