Capsule validation for heat-not-burn (HNB) aerosol-generating devices
A heater system for a non-combustible aerosol-generating device includes a heater element and a fuse element. The heater element has a heating region, a first terminal and a second terminal. The fuse element is electrically connected between the first terminal and the second terminal in parallel with the heater element. The fuse element has a region configured to induce a localized hot spot to cause the fuse element to open circuit in response to power applied between the first terminal and the second terminal.
1. A heater system for a non-combustible aerosol-generating device, the heater system comprising:
a heater element having a heating region, a first terminal and a second terminal;
a fuse element electrically connected between the first terminal and the second terminal in parallel with the heater element, the fuse element having a region configured to induce a localized hot spot to cause the fuse element to open circuit in response to power applied between the first terminal and the second terminal; and
an end cap having a chamber configured to isolate the fuse element from air flow through the heater system.
2. The heater system of claim 1 , wherein the fuse element has a resistance enabling a heating power required to activate the fuse element to be passed through the heater system.
3. The heater system of claim 1 , wherein the region configured to induce a localized hot spot is a pinched or necked region.
4. The heater system of claim 1 , wherein the fuse element is ultrasonically, electrically or laser spot welded between the first terminal and the second terminal.
5. The heater system of claim 1 , wherein the fuse element is integral with the heater element.
6. The heater system of claim 1 , wherein
the heater element includes
a first extension region connecting the heating region with the first terminal, and
a second extension region connecting the heating region with the second terminal; and
the fuse element is electrically connected to the first extension region and the second extension region.
7. A capsule of a non-combustible aerosol-generating device, the capsule comprising:
a housing containing an aerosol-forming substrate, the housing having a first end cap;
a heater element arranged within the housing, the heater element having a first terminal, a second terminal and a heating region configured to heat the aerosol-forming substrate; and
a fuse element electrically connected in parallel with the heater element, the fuse element having a region configured to induce a localized hot spot to cause the fuse element to open circuit in response to power applied between the first terminal and the second terminal, the first end cap including a chamber configured to isolate the fuse element from air flow through the capsule.
8. The capsule of claim 7 , wherein the fuse element has a resistance enabling a heating power required to activate the fuse element to be passed through the heater element and the fuse element.
9. The capsule of claim 7 , wherein the region configured to induce a localized hot spot is a pinched or necked region.
10. The capsule of claim 7 , wherein the fuse element is ultrasonically, electrically or laser spot welded between the first terminal and the second terminal.
11. The capsule of claim 7 , wherein the fuse element is integral with the heater element.
12. The capsule of claim 7 , wherein the housing comprises:
a sleeve having a first end and a second end;
and
a second end cap engaged with the second end, wherein
the first end cap is engaged with the first end, and
the first end cap is molded around the first terminal, the second terminal and the fuse element.
13. The capsule of claim 7 , wherein
the heater element includes
a first extension region connecting the heating region with the first terminal, and
a second extension region connecting the heating region with the second terminal; and
the fuse element is electrically connected to the first extension region and the second extension region.
14. A non-combustible aerosol-generating device comprising:
a capsule having an end cap, the capsule including
a heater element having a first terminal, a second terminal and a heating region configured to heat an aerosol-forming substrate, and
a fuse element electrically connected in parallel with the heater element, the fuse element having a region configured to induce a localized hot spot to cause the fuse element to open circuit in response to power applied between the first terminal and the second terminal, the end cap having a chamber configured to isolate the fuse element from air flow through the capsule; and a device body configured to connect to the capsule, the device body including
a power supply to provide power to the non-combustible aerosol-generating device, and
a controller configured to control application of power to the heater element.
15. A non-combustible aerosol-generating device comprising:
a capsule including
a housing containing an aerosol-forming substrate,
a heater element arranged in the housing, the heater element having a first terminal, a second terminal and a heating region configured to heat the aerosol-forming substrate, and
a fuse element electrically connected between the first terminal and the second terminal; and
a device body configured to connect to the capsule, the device body including
a heating engine control circuit configured to apply power to the heater element, and
a controller configured to
control the heating engine control circuit to apply a power waveform to the heater element, and
determine whether the capsule is valid based on a measured resistance profile for the heater element in response to the power waveform.
16. The non-combustible aerosol-generating device of claim 15 , further comprising:
a memory storing an expected resistance profile; and wherein
the controller is configured to determine whether the capsule is valid based on a comparison between the measured resistance profile and the expected resistance profile stored in the memory.
17. The non-combustible aerosol-generating device of claim 15 , wherein the controller is configured to enable application of power to the heater element to heat the aerosol-forming substrate to generate aerosol in response to determining that the capsule is valid.
18. The non-combustible aerosol-generating device of claim 15 , wherein the controller is configured to prevent application of power to the heater element to heat the aerosol-forming substrate to generate aerosol in response to determining that the capsule is not valid.
19. The non-combustible aerosol-generating device of claim 15 , wherein the controller is configured to control the heating engine control circuit to apply the power waveform to the heater element, and to determine whether the capsule is valid prior to application of power to the heater element to heat the aerosol-forming substrate to generate aerosol.
20. The non-combustible aerosol-generating device of claim 15 , wherein the controller is configured to obtain identification information for the capsule based on the measured resistance profile.
21. The non-combustible aerosol-generating device of claim 20 , further comprising:
a memory storing a plurality of expected resistance profiles; and wherein
the controller is configured to obtain the identification information for the capsule based on a comparison between the measured resistance profile and the plurality of expected resistance profiles stored in the memory.
22. The non-combustible aerosol-generating device of claim 15 , wherein the controller is configured to determine aerosol-generating parameters for heating the aerosol-forming substrate based on the measured resistance profile.
23. The non-combustible aerosol-generating device of claim 22 , further comprising:
a memory storing a plurality of expected resistance profiles; and wherein
the controller is configured to determine the aerosol-generating parameters based on a comparison between the measured resistance profile and the plurality of expected resistance profiles stored in the memory.
24. The non-combustible aerosol-generating device of claim 22 , wherein the aerosol-generating parameters include at least one of a heating power profile, a target temperature or a target resistance for heating the aerosol-forming substrate to generate aerosol.
25. The non-combustible aerosol-generating device of claim 15 , wherein a valid capsule is at least one of an authentic capsule, a capsule that has not been damaged prior to insertion into the non-combustible aerosol-generating device, or a capsule having an intact fuse element.