Heater for aerosol-generating device with hollow susceptor pin

1 . A heater assembly for an aerosol-generating device, comprising:

a heating chamber configured to heat an aerosol-forming substrate;

an evacuated air-tight hollow pin arranged centrally within the heating chamber; and

a susceptor layer on an outer surface of the evacuated air-tight hollow pin.

2 . The heater assembly according to claim 1 , wherein the evacuated air-tight hollow pin comprises, or is made of, a magnetically inert material.

3 . The heater assembly according to claim 1 , wherein the susceptor layer comprises a plurality of discrete portions.

4 . The heater assembly according to claim 3 , wherein one or both of a length and a width of a discrete portion among the plurality of discrete portions is between 1 millimeter and 5 millimeters.

5 . The heater assembly according to claim 3 , wherein one or both of a length and a width of a discrete portion among the plurality of discrete portions is between 2 millimeters and 3 millimeters.

6 . The heater assembly according to claim 3 , wherein two or more discrete portions among the plurality of discrete portions are separated along a longitudinal axis of the evacuated air-tight hollow pin.

7 . The heater assembly according to claim 3 , wherein two or more discrete portions of the plurality of discrete portions are arranged in a regular pattern.

8 . The heater assembly according to claim 3 , wherein two or more discrete portions of the plurality of discrete portions are arranged in a plurality of circumferential rings arranged equidistantly along a longitudinal axis of the evacuated air-tight hollow pin.

9 . The heater assembly according to claim 3 , wherein a discrete portion among the plurality of discrete portions differs from another discrete portion among the plurality of discrete portions by one or more of its shape, size, thickness, and material.

10 . The heater assembly according to claim 3 ,

wherein one or more first discrete portions among the plurality of discrete portions define a first heating zone, and one or more second discrete portions among the plurality of discrete portions define a second heating zone, and

wherein the first heating zone and the second heating zone are arranged at different positions along a longitudinal axis of the evacuated air-tight hollow pin.

11 . The heater assembly according to claim 10 , further comprising a first inductor coil configured to heat the first heating zone and a second inductor coil configured to heat the second heating zone.

12 . The heater assembly according to claim 10 , further comprising a single inductor coil configured to heat both the first and the second heating zones.

13 . The heater assembly according to claim 10 , wherein the one or more of the first discrete portions in the first heating zone differ from the one or more of the second discrete portions in the second heating zone by one or more of their number, shape, size, thickness, and material.

14 . The heater assembly according to claim 1 , wherein the susceptor layer comprises, or is made of, one or more of silicon carbide, molybdenum, graphite, stainless steel, a stainless steel alloy, an iron-nickel-cobalt alloy, copper, a copper tungsten alloy, a copper molybdenum alloy, and electroplated conductors.

15 . The heater assembly according to claim 14 , wherein the electroplated conductors comprise, or are made of, nickel, silver, gold, silver-platinum alloy, and a silver-palladium alloy.

16 . The heater assembly according to claim 1 , wherein the evacuated air-tight hollow pin comprises, or is made of, one or more of a mineral, epoxy resin, polyester, polyacrylamide, vinyl ester resin, wood, ceramic, alumina, zirconia, aramid, glass fiber, polyethylene, and glass material.

17 . An aerosol-generating device comprising the heater assembly according to claim 1 .

18 . An aerosol-generating system, comprising the aerosol-generating device according to claim 17 and an aerosol-generating article comprising an aerosol-forming substrate, wherein the aerosol-generating article is configured to be at least partly inserted into the heating chamber.