Nicotine e-vaping device with integral heater-thermocouple
A nicotine e-vaping device may include a device body configured to receive a nicotine cartridge. The nicotine cartridge includes a nicotine pre-vapor formulation, a wick, and an integral heater-thermocouple. The wick is configured to transport the nicotine pre-vapor formulation by capillary action. The integral heater-thermocouple includes a first segment made of a first alloy and a second segment made of a second alloy. The device body includes a power supply, at least one sensor, and a controller. The power supply is configured to deliver electrical energy to the integral heater-thermocouple to heat the nicotine pre-vapor formulation to generate a nicotine vapor. The at least one sensor is configured to measure a voltage difference between the first segment and the second segment of the integral heater-thermocouple during such heating. The controller is configured to adjust the electrical energy to the integral heater-thermocouple based on the measured voltage difference.
1 . A nicotine cartridge for a nicotine e-vaping device, comprising:
a housing defining a reservoir containing a nicotine pre-vapor formulation;
a wick configured to transport the nicotine pre-vapor formulation by capillary action;
an integral heater-thermocouple configured to heat the nicotine pre-vapor formulation in the wick to generate a nicotine vapor, the integral heater-thermocouple including a first segment made of a first alloy and a second segment made of a second alloy, the first segment being downstream from the second segment;
a first vapor channel; and
a second vapor channel, the first vapor channel and the second vapor channel spaced apart by the reservoir,
wherein the housing has a first longitudinal axis, and the integral heater-thermocouple has a second longitudinal axis that intersects the first longitudinal axis to form an oblique angle.
2 . The nicotine cartridge of claim 1 , wherein the housing includes a sidewall, the sidewall of the housing defining the first vapor channel and the second vapor channel extending therethrough and along the first longitudinal axis of the housing.
3 . The nicotine cartridge of claim 1 , wherein the integral heater-thermocouple has a Seebeck coefficient of about 35 to 75 μV/° C.
4 . The nicotine cartridge of claim 1 , wherein the integral heater-thermocouple has an overall resistance of about 0.5 to 3.5Ω.
5 . The nicotine cartridge of claim 1 , wherein the integral heater-thermocouple is in a form of a helical structure wrapped around the wick, the helical structure including a plurality of coils, the plurality of coils including at least one coil of the first alloy and at least one coil of the second alloy.
6 . The nicotine cartridge of claim 5 , wherein the at least one coil of the first alloy is welded to the at least one coil of the second alloy at a junction.
7 . The nicotine cartridge of claim 5 , wherein the plurality of coils is in a form of five to ten coils.
8 . The nicotine cartridge of claim 7 , wherein the plurality of coils includes one coil of the first alloy and five coils of the second alloy.
9 . The nicotine cartridge of claim 7 , wherein the plurality of coils includes two coils of the first alloy and four coils of the second alloy.
10 . The nicotine cartridge of claim 1 , wherein the first alloy has a first electrical resistivity and a first thermal conductivity, the second alloy has a second electrical resistivity and a second thermal conductivity, the first electrical resistivity is less than the second electrical resistivity, and the first thermal conductivity is greater than the second thermal conductivity.
11 . The nicotine cartridge of claim 1 , wherein the first alloy is a nickel-aluminum alloy, and the second alloy is a nickel-chromium alloy.
12 . The nicotine cartridge of claim 11 , wherein the nickel-aluminum alloy includes 95% nickel and 2% aluminum.
13 . The nicotine cartridge of claim 11 , wherein the nickel-chromium alloy includes 90% nickel and 10% chromium.
14 . A nicotine e-vaping device comprising:
a nicotine cartridge including a nicotine pre-vapor formulation, a wick, an integral heater-thermocouple, a reservoir, a first vapor channel, and a second vapor channel, the wick configured to transport the nicotine pre-vapor formulation by capillary action, the integral heater-thermocouple including a first segment made of a first alloy and a second segment made of a second alloy, the first segment being downstream from the second segment, the first vapor channel and the second vapor channel being spaced apart by the reservoir; and
a device body configured to receive the nicotine cartridge, the device body including a power supply, at least one sensor, and a controller, the power supply configured to deliver a supply of electrical energy to the integral heater-thermocouple to heat the nicotine pre-vapor formulation in the wick to generate a nicotine vapor, the at least one sensor configured to measure a voltage difference between the first segment and the second segment of the integral heater-thermocouple as a result of the supply of the electrical energy from the power supply, the controller configured to adjust the supply of the electrical energy to the integral heater-thermocouple based on the voltage difference measured by the at least one sensor,
wherein the device body has a first longitudinal axis, and the integral heater-thermocouple has a second longitudinal axis that intersects the first longitudinal axis to form an oblique angle.
15 . The nicotine e-vaping device of claim 14 , wherein the controller is configured to calculate a temperature of the integral heater-thermocouple based on the voltage difference and to cease the supply of the electrical energy when the temperature exceeds an upper threshold value.
16 . The nicotine e-vaping device of claim 14 , wherein the device body further includes a sleeve section configured to receive the nicotine cartridge, the sleeve section defining an array of inlet openings.
17 . The nicotine e-vaping device of claim 16 , wherein the array of inlet openings are in a form of a honeycomb pattern configured to facilitate an intake of ambient air which enters the device body and travels toward the power supply before moving inward and then toward the integral heater-thermocouple.