Overview of the heating chamber
A specially designed tobacco stick, known as a heated tobacco unit (HTU), is inserted from the top of the device into the stainless-steel tube within the heating chamber. When the device is turned on, the HTU is heated externally by the electronically controlled resistive heater. The design of the HTU and the heating chamber ensures that the resistive heater is positioned around the tobacco plug found within the HTU.
In addition to managing battery charging and user interface, the control electronics continuously monitor the heater's temperature to prevent it from heating above the maximum target heating temperature of 250 °C on average. To achieve this, the RTD measures the temperature at the external surface of the heating chamber, in the region where the temperature is the highest.
The target heating temperature of the heater refers to the pre-programmed temperature profile of the integrated RTD, which continuously monitors the temperature during operation and is used as basis for temperature regulation.