Non-nicotine electronic smoking devices

Abstract

In a non-nicotine electronic smoking device (10), a saturation sensor (427) measures at least one electrical property of a wick (238) between a heating element (236) and a probe wire (705) at a first time and a second time, wherein the at least one electrical property comprises a resistance, a capacitance, or both a resistance and a capacitance. A control circuit (428) is configured to cause the non-nicotine electronic smoking device to: calculate a refill rate of a flow of a non-nicotine pre-vapor formulation onto the wick based on the at least one electrical property at the first time and the at least one electrical property at the second time; determine that the refill rate is less than a threshold refill rate; and in response to determining that the refill rate is less than the threshold refill rate, output a low non-nicotine pre-vapor formulation alert.

Description

Technical Field

[0001] This disclosure relates to a non-nicotine electronic smoking device or electronic cigarette device. Background Technology

[0002] Non-nicotine electronic smoking devices or electronic cigarette devices include a heating element that vaporizes a non-nicotine vapor precursor formulation to produce non-nicotine vapor.

[0003] The non-nicotine electronic cigarette device includes a power source, such as a rechargeable battery, disposed within the device. The power source is electrically connected to a heater. The power source supplies power to the heater, causing the heater to heat to a temperature sufficient to convert the non-nicotine vapor precursor formulation into non-nicotine vapor. The non-nicotine vapor exits the non-nicotine electronic cigarette device through a mouthpiece including at least one outlet. Summary of the Invention

[0004] At least one exemplary embodiment provides a non-nicotine electronic cigarette device, comprising: a non-nicotine reservoir configured to hold a non-nicotine vapor precursor formulation; a coil configured to draw the non-nicotine vapor precursor formulation from the non-nicotine reservoir; a heating element configured to heat the non-nicotine vapor precursor formulation drawn from the non-nicotine reservoir; a probe line along the length of the coil, the probe line being separated from the heating element through the coil; a saturation sensor; and control circuitry. The saturation sensor is configured to: measure at least one electrical characteristic of the coil between the heating element and the probe line at a first time, the at least one electrical characteristic including resistance, capacitance, or both resistance and capacitance; and measure at least one electrical characteristic of the coil between the heating element and the probe line at a second time, the second time being after the first time. The control circuit is configured to cause the non-nicotine electronic cigarette device to: calculate the refill rate of the non-nicotine vapor precursor formulation flowing to the coil based on at least one electrical characteristic at a first time and at least one electrical characteristic at a second time; determine that the refill rate is less than a threshold refill rate; and output a low non-nicotine vapor precursor formulation alarm in response to determining that the refill rate is less than the threshold refill rate.

[0005] According to at least some exemplary embodiments, the control circuit can be configured to cause the non-nicotine electronic cigarette device to calculate the refill rate based on the difference between at least one electrical characteristic at a first time and at least one electrical characteristic at a second time.

[0006] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: calculate a first impedance based on at least one electrical characteristic at a first time; calculate a second impedance based on at least one electrical characteristic at a second time; and calculate a refill rate based on the difference between the first impedance and the second impedance.

[0007] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the probe line at a third time; determine that at least one electrical characteristic at the third time is greater than or equal to a threshold; and disable smoking at the non-nicotine electronic cigarette device in response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold.

[0008] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the probe line at a third time; determine that at least one electrical characteristic at the third time is greater than or equal to a threshold; and, in response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, output a low non-nicotine vapor precursor formulation alarm.

[0009] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the probe line at a third time; calculate the impedance of the absorbent core based on the at least one electrical characteristic at the third time; determine that the impedance is greater than or equal to a threshold; and disable smoking at the non-nicotine electronic cigarette device in response to determining that the impedance is greater than or equal to the threshold.

[0010] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the probe line at a third time; calculate the impedance of the absorbent core based on the at least one electrical characteristic at the third time; determine that the impedance is greater than or equal to a threshold; and output a low non-nicotine vapor precursor formulation alarm in response to determining that the impedance is greater than or equal to the threshold.

[0011] The non-nicotine electronic cigarette device may also include a power source configured to supply power to the non-nicotine electronic cigarette device.

[0012] The probe wire can be made of stainless steel.

[0013] At least one other exemplary embodiment provides a non-nicotine electronic cigarette device, comprising: a housing; an inner tube coaxially positioned within the housing; a non-nicotine reservoir configured to hold a non-nicotine vapor precursor formulation, the non-nicotine reservoir being positioned between the inner tube and the housing; a coil configured to draw non-nicotine vapor precursor formulation from the non-nicotine reservoir; a heating element configured to heat the non-nicotine vapor precursor formulation drawn from the non-nicotine reservoir; a saturation sensor assembly; and control circuitry. The saturation sensor assembly is configured to measure at least one electrical characteristic between the housing and the inner tube at a first time and a second time, the second time being after the first time. The control circuitry is configured to cause the non-nicotine electronic cigarette device to: calculate a refill rate of non-nicotine vapor precursor formulation flowing to the coil based on at least one electrical characteristic at the first time and at least one electrical characteristic at the second time; determine that the refill rate is less than a threshold refill rate; and output a low non-nicotine vapor precursor formulation alarm in response to determining that the refill rate is less than the threshold refill rate.

[0014] The non-nicotine electronic cigarette device may further include: a probe wire surrounding the outer periphery of the inner tube, wherein the saturation sensor assembly may be configured to measure at least one electrical characteristic between the outer shell and the inner tube by measuring at least one electrical characteristic between the outer shell and the probe wire surrounding the outer periphery of the inner tube. The probe wire may be a stainless steel wire.

[0015] The control circuit can be configured to enable the non-nicotine electronic cigarette device to calculate the refill rate based on the difference between at least one electrical characteristic at a first time and at least one electrical characteristic at a second time.

[0016] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: calculate a first impedance based on the electrical characteristics at a first time; calculate a second impedance based on the electrical characteristics at a second time; and calculate a refill rate based on the difference between the first impedance and the second impedance.

[0017] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the inner tube at a third time; determine that at least one electrical characteristic at the third time is greater than or equal to a threshold; and, in response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, disable smoking at the non-nicotine electronic cigarette device.

[0018] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the coil between the heating element and the inner tube at a third time; determine that at least one electrical characteristic at the third time is greater than or equal to a threshold; and, in response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, output a low non-nicotine vapor precursor formulation alarm.

[0019] The control circuit is configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the absorbent core between the heating element and the inner tube at a third time; calculate the impedance of the absorbent core based on the at least one electrical characteristic at the third time; determine that the impedance is greater than or equal to a threshold; and disable smoking at the non-nicotine electronic cigarette device in response to determining that the impedance is greater than or equal to the threshold.

[0020] The control circuit can be configured to cause the non-nicotine electronic cigarette device to: measure at least one electrical characteristic of the coil between the heating element and the inner tube at a third time; calculate the impedance of the coil based on the at least one electrical characteristic at the third time; determine that the impedance is greater than or equal to a threshold; and output a low non-nicotine vapor precursor formulation alarm in response to determining that the impedance is greater than or equal to the threshold.

[0021] At least one other exemplary embodiment provides a method for detecting depletion of a non-nicotine vapor precursor formulation in a non-nicotine reservoir of a non-nicotine electronic cigarette device, the method comprising: measuring at least one electrical characteristic of a wick between a heating element and a probe line at a first time, the at least one electrical characteristic including resistance, capacitance, or both resistance and capacitance; measuring at least one electrical characteristic of the wick between the heating element and the probe line at a second time, the second time being after the first time; calculating a refill rate of the non-nicotine vapor precursor formulation flowing to the wick based on the at least one electrical characteristic at the first time and the at least one electrical characteristic at the second time; determining that the refill rate is less than a threshold refill rate; and outputting a low non-nicotine vapor precursor formulation alarm in response to determining that the refill rate is less than the threshold refill rate.

[0022] According to at least some exemplary embodiments, the method may further include: measuring at least one electrical characteristic of the absorbent core between the heating element and the probe line at a third time; determining that at least one electrical characteristic at the third time is greater than or equal to a threshold; and disabling smoking at a non-nicotine electronic cigarette device in response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold. Attached Figure Description

[0023] The various features and advantages of the non-limiting embodiments of the invention will become clearer when the detailed description is reviewed in conjunction with the accompanying drawings. The drawings are provided for illustrative purposes only and should not be construed as limiting the scope of the claims. Unless expressly stated otherwise, the drawings are not considered to be drawn to scale. Various dimensions in the drawings may be enlarged for clarity.

[0024] Figure 1 This is a side view of a non-nicotine electronic smoking device or electronic cigarette device according to at least one exemplary embodiment.

[0025] Figure 2 yes Figure 1An exemplary embodiment of the first segment of the non-nicotine electronic cigarette device shown is a cross-sectional view along line II-II'.

[0026] Figure 3 yes Figure 2 An exploded view of an exemplary embodiment of the first segment shown.

[0027] Figure 4 yes Figure 1 An exemplary embodiment of the second section of the electronic smoking device shown is a cross-sectional view along line II-II'.

[0028] Figure 5 yes Figure 4 An exploded view of an exemplary embodiment of the second section shown.

[0029] Figure 6 yes Figure 1 A cross-sectional view along line II-II' of an exemplary embodiment of a non-nicotine electronic cigarette device shown.

[0030] Figure 7 This is a cross-sectional view of an exemplary embodiment of a saturated circuit component.

[0031] Figure 8 This is a cross-sectional view of another exemplary embodiment of a saturated circuit component.

[0032] Figure 9 This is a cross-sectional view of another exemplary embodiment of a saturated circuit component.

[0033] Figure 10 This is a block diagram showing the circuit layout determined by saturation.

[0034] Figure 11 This is a flowchart of a method for detecting the depletion of a non-nicotine vapor precursor formulation according to an exemplary embodiment. Detailed Implementation

[0035] This document discloses some detailed exemplary embodiments. However, the specific structural and functional details disclosed herein are merely representative and for the purpose of describing exemplary embodiments. Exemplary embodiments may be implemented in many alternative forms and should not be considered limited to the exemplary embodiments listed herein.

[0036] Therefore, while exemplary embodiments can have various modifications and alternative forms, their exemplary embodiments are shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that there is no intention to limit the exemplary embodiments to the specific forms disclosed; rather, the exemplary embodiments will cover all modifications, equivalents, and alternative forms falling within the scope of the exemplary embodiments. Throughout the description of the accompanying drawings, the same reference numerals denote the same elements.

[0037] Figure 1 This is a side view of a non-nicotine electronic cigarette device according to at least one exemplary embodiment.

[0038] See Figure 1 In at least one exemplary embodiment, the non-nicotine electronic smoking device (electronic cigarette device) 10 includes a replaceable cartridge (or first segment) 105 and a reusable battery segment (or second segment) 110. The first segment 105 and the second segment 110 may be coupled together at a connector assembly 115.

[0039] In at least one exemplary embodiment, connector assembly 115 may be a connector as described in U.S. Application Serial No. 15 / 154,439, filed May 13, 2016, the entire contents of which are incorporated herein by reference. As described in U.S. Application Serial No. 15 / 154,439, connector assembly 115 may be formed by a deep drawing process.

[0040] exist Figure 1 In the exemplary embodiment shown, the first segment 105 includes a first housing 120, and the second segment 110 includes a second housing 120'. The non-nicotine electronic cigarette device 10 includes a mouthpiece 125 located at a first end 130 and an end cap 135 located at a second end 140.

[0041] According to at least one exemplary embodiment, the first housing 120 and the second housing 120' may have a generally cylindrical cross-section. In other exemplary embodiments, along one or more of the first segment 105 and the second segment 110, housings 120 and 120' may have a generally triangular, rectangular, elliptical, square, or polygonal cross-section. Furthermore, housings 120 and 120' may have the same or different cross-sectional shapes, or the same or different dimensions. As discussed herein, housings 120 and 120' may also be referred to as outer shells or main housings.

[0042] Although exemplary embodiments are described in some cases with respect to the first segment 105 coupled to the second segment 110, the exemplary embodiments should not be limited to these examples.

[0043] Figure 2 The first section 105 of the non-nicotine electronic cigarette device 10 Figure 1 The cross-sectional view of line II-II in the diagram. Figure 3 yes Figure 2 An exploded view of an exemplary embodiment of the first segment 105 shown.

[0044] See Figure 2 and Figure 3The first housing 120 extends in the longitudinal direction, and the air pipe 202 (or flue) is coaxially positioned within the first housing 120.

[0045] A first end portion of the air tube 202 (e.g., upstream of the airflow during smoking), and a first nose portion 204 of the first gasket 206 (or seal) are fitted into the air tube 202. The outer periphery of the first gasket 206 provides a seal against the inner surface of the first housing 120. The first gasket 206 includes a central longitudinal air passage 208 that is in fluid communication with the air tube 202 to define an internal passage (also referred to as a central channel or central internal passage) 210. A transverse channel 212 at the rear portion of the first gasket 206 intersects with and communicates with the air passage 208 of the first gasket 206. The transverse channel 212 allows fluid communication between the air passage 208 and the central air passage 214, which will be discussed in more detail later.

[0046] The first connecting device 216 is assembled into the first end of the first housing 120. The first connecting device 216 is part of the connector assembly 115.

[0047] The first connecting device 216 is a hollow cylinder having an internal thread on a portion of its outer surface. The first connecting device 216 is conductive and may be formed of or coated with a conductive material. The internal thread (or internal thread segment) may mate with the external thread (or external thread segment) of the second segment 110 to connect the first segment 105 and the second segment 110. However, the exemplary embodiment is not limited to this exemplary embodiment. Instead, the connector may be, for example, a mating connector, a pawl connector, a clamp connector, or a snap-fit ​​connector, etc. Furthermore, the positioning of the male and female connectors may be reversed as needed, such that the male connector is part of the first segment 105.

[0048] The conductive post 218 is nested within the hollow portion of the first connecting device 216 and is electrically insulated from the first connecting device 216 by a gasket insulator 220. The conductive post 218 may be formed of a conductive material (e.g., stainless steel or copper) and may serve as the anode portion of the first connecting device 216.

[0049] Conductive post 218 defines a central air passage 214. The central air passage 214 is in fluid communication with air passage 208 via a transverse channel 212. Gasket insulator 220 holds conductive post 218 within the first connector 216. Gasket insulator 220 also electrically insulates conductive post 218 from the outer portion 222 of the first connector 216.

[0050] The outer portion 222 of the first connecting device 216 serves as the cathode connector of the first connecting device 216, and the outer portion 222 is electrically insulated from the conductive post 218 by a gasket insulator 220. The outer portion 222 may sometimes be referred to herein as the cathode connector or cathode portion. The outer portion 222 may be formed of a conductive material (e.g., stainless steel or copper).

[0051] See still Figure 2 and 3 In the exemplary embodiment shown, the second nose portion 224 of the second gasket 226 can be fitted into the second end portion 250 of the air tube 202. The outer periphery of the second gasket 226 can also provide a substantially tight seal with the inner surface of the first housing 120. The second gasket 226 may include a central passage 228 (or channel) disposed between the internal passage 210 of the air tube 202 and the interior of the mouthpiece 125. Non-nicotine vapor can flow from the internal passage 210 through the central passage 228 into the cavity within the mouthpiece 125.

[0052] The mouthpiece 125 includes at least two outlets 230, which can be positioned off-axis of the longitudinal axis of the non-nicotine electronic cigarette device 10. The outlets 230 can be recessed or non-recessed and are inclined outwards relative to the longitudinal axis of the non-nicotine electronic cigarette device 10. The outlets 230 can be distributed substantially uniformly around the periphery of the mouthpiece 125 to distribute non-nicotine vapor substantially uniformly.

[0053] The first section 105 also includes: a non-nicotine reservoir 232 configured to store a non-nicotine vapor precursor formulation; and a vaporizer 234. The vaporizer 234 includes a heating element 236 and a suction core 238. The vaporizer 234 is configured to vaporize the non-nicotine vapor precursor formulation drawn from the non-nicotine reservoir 232. Figure 2 and Figure 3 In the exemplary embodiment shown, the boundary of the non-nicotine reservoir 232 is defined between the first gasket 206, the second gasket 226, the first housing 120, and the air tube 202. However, the exemplary embodiment should not be limited to this example. The non-nicotine reservoir 232 may include: a non-nicotine vapor precursor formulation; and optionally, storage media 232LD, 232HD, which are configured to store the non-nicotine vapor precursor formulation therein.

[0054] In at least one exemplary embodiment, the storage medium may be a fibrous material, including at least one of: cotton (e.g., a roll of cotton yarn), polyethylene, polyester, rayon, or combinations thereof. Figure 2 and Figure 3As shown, storage media 232LD and 232HD may comprise two layers of fibrous material. Each layer may have a different density. The fibers may have a diameter ranging from approximately 6 micrometers to approximately 15 micrometers (e.g., approximately 8 micrometers to approximately 12 micrometers or approximately 9 micrometers to approximately 11 micrometers). The storage medium may be a sintered, porous, or foamed material. Similarly, the fiber dimensions may be designed to be non-breathable, and its cross-section may have a Y-shape, cross-shape, clover shape, or any other suitable shape. Figure 3 In the exemplary embodiment shown, the storage medium includes a low-density gauze 232LD surrounding a high-density gauze 232HD. The high-density gauze 232HD can be positioned between the low-density gauze 232LD and the air tube 202, such that the non-nicotine vapor precursor formulation is drawn into the absorbent core 238.

[0055] In at least one other exemplary embodiment, the non-nicotine reservoir 232 may include a filling tank that contains no storage medium and contains only a non-nicotine vapor precursor formulation.

[0056] In at least one exemplary embodiment, the non-nicotine reservoir 232 may at least partially surround the internal passage 210 and the air duct 202. A heating element 236 may extend laterally through the internal passage 210 between opposing portions of the non-nicotine reservoir 232. In at least some exemplary embodiments, the heating element 236 may extend parallel to the longitudinal axis of the internal passage 210.

[0057] The size and configuration of the non-nicotine reservoir 232 are designed to retain sufficient non-nicotine vapor precursor formulation, allowing the non-nicotine e-cigarette device 10 to be configured for inhalation of at least approximately 200 seconds. Furthermore, the non-nicotine e-cigarette device 10 can be configured to allow each inhalation to last a maximum of approximately 5 seconds.

[0058] As mentioned above, the vaporizer 234 includes a heating element 236 and a wick 238. The wick 238 may include at least a first end portion and a second end portion, which may extend into the opposite side of the non-nicotine reservoir 232. The heating element 236 may at least partially surround the central portion of the wick 238.

[0059] The coil 238 can draw a non-nicotine vapor precursor formulation from the reservoir 232 (e.g., via capillary action), and the heating element 236 can heat the non-nicotine vapor precursor formulation in the central portion of the coil 238 to a temperature sufficient to vaporize the non-nicotine vapor precursor formulation, thereby generating "vapor". As used herein, "vapor" is any substance generated or output from any non-nicotine electronic cigarette device according to any exemplary embodiment disclosed herein.

[0060] In addition to the features discussed herein, at least one exemplary embodiment of the non-nicotine electronic cigarette device 10 may include features proposed in U.S. Patent Application Publication No. 2013 / 0196223, filed January 31, 2013, by Tucker et al., and / or features proposed in U.S. Patent Application Serial No. 15 / 135,930, filed April 22, 2016, by Holtz et al., the entire contents of which are incorporated herein by reference. In at least one other exemplary embodiment, the non-nicotine electronic cigarette device may include features proposed in U.S. Patent Application Serial No. 15 / 135,923, filed April 22, 2016, and / or U.S. Patent No. 9,289,014, published March 22, 2016, the entire contents of which are incorporated herein by reference.

[0061] In at least one exemplary embodiment, as discussed in more detail later, the non-nicotine vapor precursor formulation is a material or combination of materials that can be converted into a non-nicotine vapor without nicotine.

[0062] In at least one exemplary embodiment, the absorbent core 238 may include filaments (or threads) capable of drawing non-nicotine vapor precursor formulations. For example, the absorbent core 238 may be a bundle of glass (or ceramic) filaments, a bundle comprising a set of wound glass filaments, or the like, all of which are capable of drawing non-nicotine vapor precursor formulations via capillary action through the gaps between the filaments. The filaments may generally be aligned in a direction perpendicular (transverse) to the longitudinal direction of the non-nicotine electronic cigarette device 10. In at least one exemplary embodiment, the absorbent core 238 may include one to eight strands of filament, each strand comprising a plurality of glass filaments wound together. The end portions of the absorbent core 238 may be flexible and capable of folding into the range of the non-nicotine reservoir 232. The filaments may have a generally cross-shaped, clover-shaped, Y-shaped, or any other suitable cross-section.

[0063] In at least one exemplary embodiment, the wick 238 may comprise any suitable material or combination of materials. Examples of suitable materials may be (but are not limited to) glass, ceramic-based, or graphite-based materials. The wick 238 may have any suitable capillary action to contain non-nicotine vapor precursor formulations with different physical properties, such as density, viscosity, surface tension, and vapor pressure. The wick 238 may be non-conductive.

[0064] In at least one exemplary embodiment, the heating element 236 may include a coil (heater coil) that at least partially surrounds the absorbent core 238. The wire used to form the coil may be metallic. The heating element 236 may extend entirely or partially along the length of the absorbent core 238. The heating element 236 may also extend entirely or partially around the periphery of the absorbent core 238. In some exemplary embodiments, the heating element 236 may contact (or directly contact) the absorbent core 238, or may not contact (or directly contact) the absorbent core 238.

[0065] exist Figure 2 and Figure 3 In the exemplary embodiment shown, the heating element 236 is electrically connected to the conductive post 218 via a first electrical lead 240 and to the outer portion 222 via a second electrical lead 240'. Therefore, the outer portion 222 and the conductive post 218 form a corresponding external electrical connection with the heating element 236.

[0066] In at least some other exemplary embodiments, the heating element 236 may be in the form of a planar body, a ceramic body, a single wire, a mesh, a cage of resistance wire, or any other suitable form. More specifically, the heating element 236 may be any heater configured to vaporize a non-nicotine vapor precursor preparation.

[0067] In at least one exemplary embodiment, the heating element 236 may be formed of any suitable resistive material. Examples of suitable resistive materials may include (but are not limited to): copper, titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include (but are not limited to): stainless steel, nickel, cobalt, chromium, aluminum-titanium-zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese, and iron-containing alloys, as well as superalloys based on nickel, iron, cobalt, and stainless steel. For example, the heating element 236 may be formed of nickel aluminum compounds, materials with an alumina layer on the surface, iron aluminum compounds, and other composite materials. The resistive material may optionally be embedded, encapsulated, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties. The heating element 236 may include at least one material selected from the group consisting of stainless steel, copper, copper alloys, nickel-chromium alloys, superalloys, and combinations thereof. In an exemplary embodiment, the heating element 236 may be formed of a nickel-chromium alloy or an iron-chromium alloy. In another exemplary embodiment, the heating element 236 may be a ceramic heater having a resistive layer on its outer surface.

[0068] See still Figure 2 and Figure 3The air tube 202 may include a pair of opposing slots 242, such that the ends of the wick 238 and the first electrical lead 240 and the second electrical lead 240' or heating element 236 can extend from the respective opposing slots 242. Providing opposing slots 242 in the air tube 202 facilitates proper placement of the heating element 236 and the wick 238 within the air tube 202 without affecting the edges of the opposing slots 242 and the helical sections of the heating element 236. Therefore, the edges of the opposing slots 242 can be prevented from influencing and altering the coil spacing of the heating element 236, which would otherwise create a potential source of hot spots. In at least one exemplary embodiment, the air tube 202 may have a diameter of approximately 4 mm, and each opposing slot may have a large dimension of approximately 2 mm by approximately 4 mm and a small dimension of approximately 4 mm.

[0069] In at least one exemplary embodiment, the heating element 236 can heat the non-nicotine vapor precursor preparation in the absorbent core 238 via thermal conduction. Alternatively, the heat from the heating element 236 can be conducted to the non-nicotine vapor precursor preparation via a thermally conductive element, or the heating element 236 can transfer heat to the ambient air inhaled through the non-nicotine electronic cigarette device 10 during smoking, thereby heating the non-nicotine vapor precursor preparation by convection.

[0070] like Figure 3 As shown, the first section 105 may further include a cover tube 244, a spacer tube 246, and an inner tube 248. Although in Figure 2 Not shown, but the cover tube 244 can be arranged to surround the portion of the air tube 202 between the heating element 236 and the second nose portion 224. Like the air tube 202, the cover tube 244 can extend in the longitudinal direction and can be coaxially positioned within the first housing 120. The cover tube 244 can cover a portion of each opposing slot 242.

[0071] The spacer tube 246 can extend longitudinally and be coaxially positioned within the air tube 202 between the heating element 236 and the conductive post 218. The inner tube 248 can extend longitudinally and be coaxially positioned within the spacer tube 246. Although in Figure 3 The cover tube 244, spacer tube 246 and inner tube 248 are shown, but one or more of these tubes (e.g. inner tube 248) may be omitted.

[0072] Figure 4 The second segment of the non-nicotine electronic cigarette device 10, as described in an exemplary embodiment, is along... Figure 1 Cross-sectional view of line II-II'. Figure 5 yes Figure 4 An exploded view of an exemplary embodiment of the second segment 110 shown.

[0073] The second segment 110 may be a reusable segment of the non-nicotine electronic cigarette device 10, wherein the reusable segment may be able to be charged by an external charging device. Alternatively, the second segment 110 may be disposable. In this example, the second segment 110 may be used until the energy from the power source 402 is depleted (described below) (e.g., the energy drops below a threshold level).

[0074] refer to Figure 4 and Figure 5 According to at least this exemplary embodiment, the power source 402 includes an anode connection 404 and a cathode connection 406. Each of the anode connection 404 and the cathode connection 406 may be in the form of one or more electrical leads or wires. The power source 402 may be a battery. For example, the power source 402 may be a lithium-ion battery, or a variant of a lithium-ion battery, such as a lithium-ion polymer battery. The battery may be disposable or rechargeable.

[0075] The second segment 110 also includes a connecting device 408 located at the first end of the second segment 110. Figure 4 In the exemplary embodiment shown, the connector 408 is a male connector configured to connect to the female first connector 216 of the first segment 105. Alternatively, the connector 408 may be a female connector configured to connect to the male connector of the first segment 105.

[0076] exist Figure 4 In the exemplary embodiment shown, the connecting device 408 includes a thread 410 configured to engage with a corresponding thread on the first connecting device 216 of the first segment 105. Although shown as a threaded connection, according to at least some other exemplary embodiments, the connecting device 408 may be, for example, a mating connector, a pawl connector, a clamp connector, or a snap-fit ​​connector.

[0077] The cathode connection (connector 408) of power supply 402 terminates at and is electrically connected to sensor assembly 424, which is located near the second end of second segment 110. Sensor assembly 424 will be discussed in more detail later.

[0078] Anode connection 404 terminates at and is electrically connected to conductive post 412. Conductive post 412 can serve as the anode portion of connection device 408. Conductive post 412 defines a central passage 414 in fluid communication with one or more side vents 416. Side vents 416 can be holes drilled into conductive post 412. Central passage 414 and one or more side vents 416 allow sensor assembly (e.g., suction sensor assembly) 424 to detect suction caused by pressure changes as air is drawn in through air inlet 145.

[0079] Despite Figure 4 Only two side vents 416 and two air inlets 145 are shown in the illustration, but the exemplary embodiments should not be limited to this example. Instead, the conductive post 412 may include any number of side vents 416, and the connecting device 408 may include any number of air inlets 145. For example, the conductive post 412 may include four side vents 416 spaced equally apart around the conductive post 412. Similarly, the connecting device 408 may include four air inlets 145 spaced equally apart around the connecting device 408.

[0080] The conductive post 412 also includes an upper portion 418 having a notch that allows air drawn in through the air inlet 145 to flow through the end of the second section 110 and / or connect to the first section 105 when the first section 105 is connected to the second section 110.

[0081] The conductive post 412 may be formed of a conductive material (e.g., stainless steel or copper) and is nested within the hollow portion of the connecting device 408. When the connecting device 408 of the second segment 110 is coupled to the first connecting device 216 of the first segment 105, the upper portion 418 (and the conductive post 412) are physically and electrically connected to the conductive post 218 to allow current to flow from the power source 402 to the heating element 236. The electrical connection also allows for the transmission of electrical signals between the first segment 105 and the second segment 110.

[0082] See also Figure 4 and Figure 5 The gasket insulator 420 holds the conductive post 412 within the connector 408. The gasket insulator 420 also electrically insulates the conductive post 412 from the outer portion 422 of the connector 408. The outer portion 422 may be formed of a conductive material (e.g., stainless steel or copper) and may serve as the cathode portion of the connector 408.

[0083] As mentioned above, the connection device 408 includes one or more air inlets 145 configured to communicate ambient air into the connection device 408. Air inlets 145 may sometimes also be referred to as vents or air openings.

[0084] When the first section 105 is coupled to the second section 110, ambient air drawn into the connector 408 may combine and / or mix with air exiting one or more side vents 416 and flow into the first section 105. In at least one exemplary embodiment, the air inlet 145 may be drilled into the connector 408 at an angle perpendicular or substantially perpendicular to the longitudinal centerline of the connector 408 directly below the thread 410.

[0085] The sidewalls of the air inlet 145 may be beveled to angle the sidewalls inward (e.g., "sunk" the sidewalls at the edges of the air inlet 145). By angled the sidewalls at the edges of the air inlet 145 (as opposed to using relatively sharp edges at the edges of the air inlet 145), the air inlet 145 may be less likely to be blocked or partially blocked (due to a reduction in the effective cross-sectional area of ​​the air inlet 145 near the edges). In at least one exemplary embodiment, the sidewalls at the edges of the air inlet 145 may be beveled (angled) at approximately 38 degrees relative to the longitudinal length (or longitudinal centerline) of the second housing 120' and the connecting device 408 of the second segment 110.

[0086] In at least one exemplary embodiment, the size and configuration of the air inlet 145 can be such that the non-nicotine electronic cigarette device 10 has a draw resistance (RTD) in the range of about 60 mm H2O to about 150 mm H2O.

[0087] See also Figure 4 and Figure 5 As mentioned above, the second segment 110 includes a sensor assembly (e.g., a suction sensor assembly) 424.

[0088] like Figure 4 As shown, for example, sensor assembly 424 is electrically connected to and powered by power supply 402. In at least this exemplary embodiment, sensor assembly 424 includes a sensor (e.g., a suction sensor) 426, a saturation sensor 427, and control circuitry 428.

[0089] Control circuit 428 is configured to provide current and / or electrical signals to first segment 105. For this purpose, control circuit 428 is electrically connected to conductive post 412 (the anode portion of connector 408) via control circuit wiring (or lead) 430, and electrically connected to the outer (cathode) portion 422 of connector 408 via control circuit wiring (or lead) 432. In at least this example, control circuit wiring 432 acts as the cathode of the circuitry including sensor assembly 424.

[0090] Sensor 426 may be a capacitive sensor capable of sensing an internal voltage drop within the second segment 110. When the first segment 105 is coupled to the second segment 110, sensor 426 and control circuit 428 may work together to turn on and off a heater control circuit (not shown) between power supply 402 and heating element 236 of the first segment 105. In at least one exemplary embodiment, sensor 426 is configured to generate an output indication of the magnitude and direction of airflow through the non-nicotine electronic cigarette device 10. In this example, control circuit 428 receives the output of sensor 426 and determines: (1) whether the direction of airflow indicates the application of negative pressure (e.g., inhalation) to mouthpiece 125 (as opposed to positive pressure or exhalation), and (2) whether the magnitude of the applied negative pressure exceeds a threshold level. If these smoking conditions are met, control circuit 428 electrically connects power supply 402 to heating element 236 to activate heating element 236.

[0091] In one example, the heater control circuit may include a heater power control transistor (not shown). Control circuit 428 can electrically connect power supply 402 to heating element 236 by activating the heater power control transistor. In at least one example, the heater power control transistor (or heater control circuit) may be part of control circuit 428.

[0092] According to at least one exemplary embodiment, sensor assembly 424 may include one or more features proposed in Loi Ling Liu’s U.S. Patent No. 9,072,321 and / or Loi Ling Liu’s U.S. Patent Application Publication No. 2015 / 0305410, the entire contents of each of which are incorporated herein by reference. However, exemplary embodiments should not be limited to this example. Instead, control circuitry 428 and sensor 426 may be separate components arranged on a printed circuit board and connected via electrical contacts. Furthermore, although capacitive sensors have been discussed herein, sensor 426 may be any suitable pressure sensor, such as a microelectromechanical system (MEMS) including piezoresistive or other pressure sensors.

[0093] like Figures 7 to 11As described in further detail, saturation sensor 427 is connected to power supply 402 via cathode connection 406 and electrical lead 430, and to first segment 105 via electrical lead 432. Saturation sensor 427 can be configured to measure one or more electrical characteristics of a saturation circuit included in the first segment 105. According to one or more exemplary embodiments, saturation sensor 427 can measure the resistance and / or capacitance of the saturation circuit. Based on the resistance and / or capacitance, control circuitry 428 can calculate the impedance of the saturation circuit. In one example, based on the resistance, capacitance, and / or impedance, control circuitry 428 can detect when the non-nicotine vapor precursor formulation in non-nicotine reservoir 232 is depleted (e.g., the amount of non-nicotine vapor precursor formulation in the non-nicotine reservoir falls below a first minimum threshold level) and generate an alarm accordingly. In another example, when the non-nicotine vapor precursor formulation in the non-nicotine reservoir is detected to be depleted (e.g., the amount of non-nicotine vapor precursor formulation in the non-nicotine reservoir is below a second minimum threshold level, which is less than a first minimum threshold level), the control circuit 428 can disable smoking and / or power off the non-nicotine electronic cigarette device 10.

[0094] Among other things, control circuitry 428 may include a controller. According to one or more exemplary embodiments, the controller may be implemented using hardware, a combination of hardware and software, or a storage medium storing software. The hardware may be implemented using processing or control circuitry, such as, but not limited to, one or more processors, one or more central processing units (CPUs), one or more microcontrollers, one or more arithmetic logic units (ALUs), one or more digital signal processors (DSPs), one or more microcomputers, one or more field-programmable gate arrays (FPGAs), one or more system-on-a-chip (SoCs), one or more programmable logic units (PLUs), one or more microprocessors, one or more application-specific integrated circuits (ASICs), or any other means capable of responding to and executing instructions in a defined manner.

[0095] In another exemplary embodiment, control circuitry 428 may include a manually operable switch for an adult smoker to supply power to heating element 236.

[0096] In at least one exemplary embodiment, the control circuit 428 may limit the duration for which current is continuously supplied to the heating element 236. This duration may be set or preset depending on the amount of the non-nicotine vapor precursor formulation to be vaporized. In one example, the duration for which current is continuously applied to the heating element 236 may be limited such that the heating element 236 heats a portion of the wick 238 for less than about 10 seconds. In another example, the duration for which current is continuously applied to the heating element 236 may be limited such that the heating element 236 heats a portion of the wick 238 for about 5 seconds.

[0097] See also Figure 4 and Figure 5 The sensor assembly 424 is supported and mounted within a sensor holder 434 at the second end of the second segment 110. In at least one exemplary embodiment, the sensor holder 434 may be part of a silicone or rubber gasket. However, the exemplary embodiments are not limited to this example.

[0098] The thermally activated lamp 436 can also be placed at the second end of the second section 110. Figure 4 In the exemplary embodiment shown, a thermal activation lamp 436 may be disposed within an end cap 135. The thermal activation lamp 436 may include one or more light-emitting diodes (LEDs). The LEDs may include one or more colors (e.g., white, yellow, red, green, or blue). Furthermore, the thermal activation lamp 436 may be visible to an adult smoker during smoking and is configured to emit light when the power supply 402 supplies current to the heating element 236. The thermal activation lamp 436 may be used for non-nicotine electronic cigarette system diagnostics or to indicate that recharging of the power supply 402 is in progress. The thermal activation lamp 436 may also be configured such that an adult smoker can activate or deactivate the thermal activation lamp 436 for privacy. The thermal activation lamp 436 may be part of or electrically connected to a sensor assembly 424 as described in U.S. Patent No. 9,072,321 of Loi Ling Liu and / or U.S. Patent Application Publication No. 2015 / 0305410 of Loi Ling Liu.

[0099] Figure 6 yes Figure 1 A cross-sectional view along line II-II' of an exemplary embodiment of a non-nicotine electronic cigarette device shown.

[0100] exist Figure 6 In the diagram, the first segment 105 is shown as coupled to the second segment 110. Figure 6 The arrows in the diagram indicate the exemplary airflow through the non-nicotine electronic cigarette device 10.

[0101] Now about Figure 6 The operation of the non-nicotine electronic cigarette device 10 generating non-nicotine vapor when the first section 105 is coupled to the second section 200 is described.

[0102] See Figure 6 In response to the application of negative pressure to the mouthpiece 125, air is primarily drawn into the first section 105 through at least one air inlet 145.

[0103] If the control circuit 428 detects the smoking conditions discussed above, the control circuit 428 initiates power supply to the heating element 236, causing the heating element 236 to heat the non-nicotine vapor precursor preparation on the absorbent core 238 to generate non-nicotine vapor.

[0104] Air drawn in through air inlet 145 enters the cavity within connector 408 and passes through the notch in upper portion 418 into central air passage 214. Air flows from central air passage 214 through transverse passage 212, through air passage 208, and then through internal passage 210.

[0105] Air flowing through internal passage 210 combines and / or mixes with non-nicotine vapor generated by heating element 236, and the air-non-nicotine vapor mixture enters central passage 228 from internal passage 210 and then enters the cavity within mouthpiece 125. The air-non-nicotine vapor mixture flows out of the cavity in mouthpiece 125 through outlet 230.

[0106] Figure 7 This is a cross-sectional view of an exemplary embodiment of the saturated circuit component 700. Figure 7 A portion of the first segment 105 of the non-nicotine electronic cigarette device 10 is depicted, enhancing the view of the heating element 236. In at least one exemplary embodiment, the saturation circuit assembly 700 includes a probe line 705 extending along the length of the absorbent core 238 but separate from (not in contact with) the heating element 236. In various exemplary embodiments, the absorbent core 238 and the probe line 705 may be compared... Figure 7 The probe wire 705 is connected to the first electrical lead 240 via the first probe lead 710. When the first segment 105 engages with the second segment 110, the first probe lead 710 electrically connects the probe wire 705 to the power supply 402 in the second segment 110.

[0107] As previously mentioned and described in more detail below, the saturation sensor 427 can measure at least one electrical characteristic or determine the impedance across at least a portion of the first segment 105. More specifically, for example, the saturation sensor 427 can measure at least one electrical characteristic or determine the impedance across the saturation circuit assembly 700, connecting probe line 705 and heating element 236 to the first electrical lead 240 and the second electrical lead 240'. In various exemplary embodiments, the at least one electrical characteristic may include, but is not limited to, resistance, capacitance, or both.

[0108] The control circuit 428 in the second section 140' can determine the impedance associated with the heating element 236 and the probe line 705 based on measured electrical characteristics (e.g., resistance measured by the saturation sensor 427). In various exemplary embodiments, the control circuit 428 can determine the saturation level of the suction core 238 based on impedance or at least one electrical characteristic.

[0109] Because the electrical characteristics and the resulting impedance indicate (e.g., directly indicate) the saturation level of the wick 238, the electrical characteristics and / or impedance can be used to detect the depletion of the non-nicotine vapor precursor formulation in the non-nicotine reservoir 232, thus preventing the generation of undesirable non-nicotine vapor elements. In other words, for example, the saturation sensor 427 and the measured electrical characteristics enable the detection of dry wick conditions (also known as dry suction conditions), and consequently, the detection of the depletion of the non-nicotine vapor precursor formulation in the non-nicotine reservoir.

[0110] The probe line 705 can be made of stainless steel; however, any other conductive metal acceptable for product safety can be used. The saturation sensor 427 can implement any suitable method for determining the impedance between the heating element 236 and the probe line 705, such as based on measured resistance, measured capacitance, or a combination of measured resistance and capacitance.

[0111] As described below, the saturated circuit assembly 700 is sensitive to the presence and amount of the non-nicotine vapor precursor formulation in the absorbent core 238. For example, when the absorbent core 238 is initially dry, the impedance can have a resistance measurement of more than about 10 MΩ and a capacitance of about 2 pF. However, once (e.g., within a few seconds) a drop of the non-nicotine vapor precursor formulation (e.g., about 5 mg) is placed on one end of the absorbent core 238, the resistance measurement can be about 2 MΩ and the capacitance can be about 200 pF. With further addition of the non-nicotine vapor precursor formulation, the impedance continues to change until the absorbent core 238 is saturated. When fully saturated, the absorbent core 238 can have a resistance of about 45 KΩ and a capacitance of about 2200 pF.

[0112] According to one or more exemplary embodiments, in response to a resistance greater than or equal to about 10 MΩ and / or a capacitance less than or equal to about 2 pF, control circuitry 428 can turn off or disable smoking at the non-nicotine electronic cigarette device 10 by cutting off the power supply to heating element 236. Additionally or alternatively, control circuitry 428 can generate and display a dry coil alarm by illuminating an indicator light on the non-nicotine electronic cigarette device 10. The indicator light may be a thermally activated lamp 436, and may illuminate a specific color or flash when a dry coil alarm is generated. In various exemplary embodiments, a separate indicator light may be included on the first housing 120 of the non-nicotine electronic cigarette device 10.

[0113] One or more exemplary embodiments may provide more accurate resistance and / or capacitance measurements because the saturated circuit assembly 700 is more directly affected by the amount of non-nicotine vapor precursor formulation that saturates the absorbent core 238, since the absorbent core 238 is in contact with the probe line 705 and the heating element 236.

[0114] Furthermore, the non-nicotine vapor precursor formulation includes glycerin, propylene glycol, and water, while other components are present in smaller amounts. Therefore, the non-nicotine vapor precursor formulation acts as a component formed on the heating element 236 and probe line 705 (or the first housing 120, as shown in the image). Figure 8 and Figure 9 The electrolyte in the capacitor between (as shown). Therefore, the amount of non-nicotine vapor precursor formulation present has a more direct impact on the capacitance of saturation sensor 427.

[0115] Because the non-nicotine vapor precursor formulation is not an insulator, it allows current to flow, which can be easily measured to determine resistance. Both capacitance and resistance change directly with the amount of non-nicotine vapor precursor formulation on wick 238 (also known as the saturation level). Either or both of capacitance and resistance can be measured to determine if the amount of non-nicotine vapor precursor formulation on wick 238 is decreasing (or has decreased) below a minimum threshold level (e.g., wick 238 begins to dry). A combination of resistance and capacitance can be used to determine the impedance of wick 238.

[0116] When the non-nicotine vapor precursor formulation is heated to generate non-nicotine vapor, the saturation level of the wick 238 decreases, and additional non-nicotine vapor precursor formulation flows from the non-nicotine reservoir (e.g., via capillary action) into the wick 238 to replenish it. As a result, the flow rate at which the saturation level of the wick 238 is replenished can be determined.

[0117] Control circuit 428 can compare the flow rate or refill rate with a minimum flow rate threshold to determine if the non-nicotine vapor precursor formulation in the non-nicotine reservoir is running low. If the flow rate is below the minimum flow rate threshold, control circuit 428 determines that the non-nicotine vapor precursor formulation in the non-nicotine reservoir is running low and can output a corresponding indication or alarm to the adult smoker. The indication or alarm may be an illuminated indicator light (simply turning on the light or executing a flashing mode).

[0118] The following will be about Figure 11 The calculation of the flow rate or refill rate of the suction core 238 is discussed in more detail.

[0119] Furthermore, electrical characteristic measurements can be performed during operation of the non-nicotine electronic cigarette device 10 (e.g., during inhalation when power is supplied to the heating element 236), and can be performed using the first electrical lead 240 and the second electrical lead 240', without requiring an additional third electrical lead from the first segment 105 to the second segment 110.

[0120] Although described within a non-nicotine electronic cigarette device 10, the saturation sensor 427 and saturation circuit assembly 700 can be implemented on a wick, which is included in coating or ink systems, food systems for wicking flavorings or other ingredients, feedback systems for increasing wick refill rates, medical systems for detecting bandage saturation, and the like. Because the saturation sensor 427 and saturation circuit assembly 700 are sensitive, the described system can be used to detect the presence of liquid or an increase in liquid level before liquid begins to accumulate in a protected area, thereby increasing the variety of applications of the system.

[0121] Figure 8 This is a cross-sectional view of another exemplary embodiment of the saturated circuit component 800. Figure 8 A portion of the first segment 105 of the non-nicotine electronic cigarette device 10 is depicted, enhancing the view of the heating element 236. Figure 8 The saturated circuit component 800 is similar to Figure 7 In the exemplary embodiments shown, the saturated circuit assembly 800 includes a probe line 805 surrounding the air tube 202, which is connected to a first electrical lead 240. In various exemplary embodiments, the probe line 805 may be connected to a second electrical lead 240'.

[0122] A first probe lead 810 connects one end of probe line 805 to a first electrical lead 240. Additionally, a first housing 120 is connected to the first electrical lead 240 via a first housing lead 820. A saturation sensor 427 measures the resistance and / or capacitance between probe line 805 and the first housing 120 to determine the amount of non-nicotine vapor precursor formulation in the non-nicotine reservoir 232. Then, as described above, control circuitry 428 disables the non-nicotine e-cigarette device 10 and / or accordingly outputs an alarm indicating an empty, low, or nearly depleted non-nicotine reservoir 232. In various exemplary embodiments, the saturation circuitry 800 may not include the first housing lead 820, but instead measures the resistance and / or capacitance across probe line 805 and heating element 236. As similarly mentioned above, probe line 805 is configured to surround air tube 202.

[0123] Figure 9 This is a cross-sectional view of another exemplary embodiment of the saturated circuit component 900. Figure 9 A portion of the first segment 105 of the non-nicotine electronic cigarette device 10 is depicted, enhancing the view of the heating element 236. Figure 9 The saturated circuit component 900 is similar to Figure 8 The exemplary embodiment shown excludes probe lines 805 from the saturation circuit assembly 900. Instead, the saturation sensor 427 measures the resistance and / or capacitance across the heating element 236 and the first housing 120 to determine the saturation level of the wick 238.

[0124] Figure 10 This is a block diagram of an exemplary embodiment of a saturation-determined circuit layout. Figure 7 The saturation circuit assembly 700 is electrically coupled to the power supply 402, sensor assembly 424, saturation sensor 427, and control circuitry 428 via various electrical leads (first electrical lead 240, second electrical lead 240', anode connection 404, cathode connection 406, control circuit wiring 430 and 432) and conductive posts 218 and 418. The saturation sensor 427 measures the resistance and / or capacitance across the saturation circuit assembly 700. The same saturation determination circuit arrangement can be used with… Figure 8 saturated circuit component 800 and Figure 9 It is used together with the saturated circuit assembly 900.

[0125] The control circuit 428 may include a non-volatile memory (not shown) that stores impedance thresholds, resistance thresholds, capacitance thresholds, flow rate or refill rate thresholds, etc.

[0126] Figure 11 This is a flowchart illustrating a method for detecting the depletion of non-nicotine vapor precursor formulations.

[0127] For illustrative purposes, information about resistance and about Figure 7 To discuss the exemplary embodiments shown Figure 11 The exemplary embodiment shown is shown. However, the exemplary embodiment should not be limited to this example. Instead, the control circuit 428 may perform operations based on the measured capacitance or impedance of the suction core 238. Figure 11 The method shown. In one example, control circuit 428 can measure the capacitance of suction core 238, and then... Figure 11 The method shown utilizes this capacitor instead of a resistor. In another example, control circuit 428 can measure the resistance and capacitance of the absorbent core 238, and then use this to calculate and / or determine the impedance of the absorbent core 238. Then, in Figure 11 In the method shown, the impedance of the suction core 238 can be used instead of the resistor. Furthermore, the control circuit 428 can be based on... Figure 8 and Figure 9 The exemplary embodiment of the saturated circuit component shown is used to obtain information to perform a similar method.

[0128] See Figure 11At 1000, control circuit 428 determines whether a smoking condition exists at the non-nicotine electronic cigarette device 10. According to at least one exemplary embodiment, control circuit 428 may determine whether a smoking condition exists at the non-nicotine electronic cigarette device 10 based on the output from sensor assembly 424. In one example, if the output from sensor assembly 424 indicates that a negative pressure above a threshold is applied at the mouthpiece 125 of the non-nicotine electronic cigarette device 10, control circuit 428 determines that a smoking condition exists at the non-nicotine electronic cigarette device 10.

[0129] If control circuit 428 determines that a smoking condition exists, then at 1100, control circuit 428 measures (or causes saturation circuit assembly 700 to measure) the resistance of suction core 238. As mentioned above, although Figure 11 The exemplary embodiments shown are discussed in relation to resistance, but the control circuit 428 can measure and / or determine at least one electrical characteristic of the absorbent core 238, wherein the at least one electrical characteristic may include: the resistance and / or capacitance of the absorbent core 238, or the impedance of the absorbent core 238, said impedance being determined based on resistance and / or capacitance.

[0130] At 1105, the control circuit 428 determines whether the measured resistance of the absorbent core 238 is greater than or equal to a first threshold (e.g., approximately 10 MΩ).

[0131] If the measured resistance of the coil 238 is greater than or equal to a first threshold, then at 1110, the control circuit 428 disables the non-nicotine electronic cigarette device 10. In at least one exemplary embodiment, disabling the non-nicotine electronic cigarette device 10 may include disabling the smoking function by cutting off the power to the heating element 236 or by powering off (or putting the non-nicotine electronic cigarette device 10 into a low-power state). The process then terminates. Although not shown, at 1110, the control circuit 428 may also cause the thermal activation lamp 436 to illuminate in a specific color to indicate that the coil 238 is dry and / or the non-nicotine reservoir 232 is depleted.

[0132] Returning to 1105, if the control circuit 428 determines that the measured resistance is less than the first threshold, then at 1115, the control circuit 428 determines whether the measured resistance is higher than the second threshold (e.g., approximately 2 MΩ).

[0133] If the measured resistance is higher than the second threshold (and therefore between approximately 10 MΩ and approximately 2 MΩ), then at 1120, the control circuit 428 generates and displays a low alarm for the non-nicotine vapor precursor preparation, such as by illuminating the thermally activated lamp 436.

[0134] In 1145, control circuit 428 determines whether smoking conditions still exist in the same or substantially the same manner as discussed above regarding 1000.

[0135] If the smoking conditions still exist, the process returns to 1100 and continues as discussed in this article.

[0136] Returning to 1145, the process terminates if the smoking conditions no longer exist (e.g., the smoking has ended).

[0137] Returning to 1115, if the measured resistance is less than the second threshold, then at 1117, the control circuit 428 determines whether the smoking condition still exists (whether the current puff has ended) in the same or substantially the same manner as discussed above with respect to 1000.

[0138] If the smoking condition no longer exists, at 1130, the control circuit 428 measures the resistance of the absorbent core 238 when the smoking condition stops, and again measures the resistance of the absorbent core at the end of a threshold time period (e.g., 0.5, 1, or 2 seconds).

[0139] At 1135, control circuit 428 calculates the refill rate or flow rate based on the difference between the saturation level at the end of aspiration (indicated by a resistance measurement) and the saturation level at the end of the threshold time period (indicated by a resistance measurement). In this case, the saturation level can be indicated by the resistance level R0 measured by the aspirator 238 at the end of aspiration (first time) and the resistance level R1 measured by the aspirator 238 at the end of the threshold time period (second time) after aspiration has ended. In one example, control circuit 428 can calculate the refill rate as the change in resistance level divided by the threshold time period t. TH length In another example using impedance, the refill rate can be calculated as the change in impedance level divided by the length of the threshold time period; that is... Where Z0 is the impedance of the suction core 238 at the end of aspiration, and Z1 is the impedance of the suction core at the end of the threshold time period after aspiration.

[0140] In at least one other exemplary embodiment, the control circuit 428 can calculate the flow rate or refill rate by monitoring the resistance, capacitance, and / or impedance of the suction core 238 during aspiration to determine the minimum saturation level (e.g., the maximum resistance or impedance value) and when the suction core 238 subsequently becomes resaturated (reaching its initial resistance or impedance level). The control circuit 428 can then calculate the flow rate as the amount of resaturation (the difference between the impedance at depletion and resaturation, which can be indicated by a resistance measurement) during the time between when the suction core 238 is at the minimum saturation level and when the core 238 becomes resaturated again.

[0141] At 1140, the control circuit 428 compares the refill rate calculated at 1135 with the minimum refill rate threshold to determine whether the refill rate is less than the minimum refill rate threshold.

[0142] As the amount of non-nicotine vapor precursor formulation in the non-nicotine reservoir 232 decreases, the refill rate of the wick 238 decreases. Therefore, when the refill rate of the wick falls below a minimum threshold level, the control circuit 428 can determine that the non-nicotine vapor precursor formulation in the non-nicotine reservoir 232 is being depleted (below the minimum threshold).

[0143] If at 1140 control circuit 428 determines that the refill rate is below a minimum threshold, then control circuit 428 determines that the non-nicotine vapor precursor formulation in non-nicotine reservoir 232 is being depleted (very low). Therefore, the process proceeds to 1120 and continues as discussed herein.

[0144] Returning to 1140, if the refill rate is greater than the minimum refill rate threshold, the process returns to 1100 and continues as discussed in this article.

[0145] Returning to 1117, if control circuit 428 determines that the smoking condition still exists, control circuit 428 continues to monitor the output of sensor assembly 424 to determine when the smoking condition stops (smoking has ended). Once the smoking condition no longer exists, the process proceeds to 1130 and continues as discussed above.

[0146] Now return to Figure 11 If, at step 1000, the control circuit 428 determines that a smoking condition does not yet exist, it continues to monitor the output of the sensor assembly 424 to determine the smoking condition. Once a smoking condition is detected, the process proceeds to step 1100 and continues as discussed above.

[0147] It should be understood that when an element or layer is referred to as "on another element or layer," "connected to another element or layer," "coupled to another element or layer," or "covering another element or layer," the element or layer may be directly located on, directly connected to, coupled to, or cover the other element or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as "directly located on another element or layer," "directly connected to another element or layer," or "directly coupled to another element or layer," there are no intermediate elements or layers. Throughout this specification, the same reference numerals denote the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed related items.

[0148] It should be understood that although the terms first, second, third, etc., used herein may describe different elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or segment from another region, layer, or segment. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as a second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0149] For ease of description, spatially related terms (e.g., "below," "below," "down," "above," "upper," etc.) may be used to describe the relationship between one element or feature shown in the accompanying drawings and another element or feature. It should be understood that, in addition to the orientations depicted in the accompanying drawings, spatially related terms are intended to include different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as "below" or "below other elements or features" would be oriented "above other elements or features." Therefore, the term "below" can include both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein shall be interpreted accordingly.

[0150] The terminology used herein is for the purpose of describing different exemplary embodiments only and is not intended to limit the exemplary embodiments. The singular forms “a,” “an,” and “described” as used herein are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that, when used in this specification, the terms “comprising,” “including,” “containing,” and / or “comprising” indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0151] This document describes exemplary embodiments with reference to cross-sectional illustrations, which are representative illustrations of ideal embodiments (and intermediate structures) of the exemplary embodiments. Thus, variations in the shape of the illustrations can be anticipated as a result of, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be considered limited to the shape of the areas shown herein, but rather include, for example, deviations in shape due to manufacturing processes.

[0152] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. It should be further understood that, unless expressly defined herein, terms (including those defined in commonly used dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant technical field and shall not be interpreted in an idealized or overly formal sense.

[0153] In an exemplary embodiment, the non-nicotine vapor precursor formulation includes a flavoring agent (at least one flavoring agent) and / or a non-nicotine compound. In an exemplary embodiment, the non-nicotine vapor precursor formulation is a liquid, solid, dispersion, and / or gel formulation, including but not limited to water, beads, solvents, active ingredients, ethanol, plant extracts, natural or artificial flavorings, and / or at least one non-nicotine vapor formation, such as glycerol and propylene glycol.

[0154] Non-nicotine compounds do not contain nicotine. In an exemplary embodiment, non-nicotine compounds do not include tobacco, nor are they compounds derived from tobacco.

[0155] In exemplary embodiments, the non-nicotine compound is present or included therein in the form of a solid, semi-solid, gel, hydrogel, or combination thereof, and is injected into, mixed with, or combined therein into a non-nicotine vapor precursor formulation. In exemplary embodiments, the non-nicotine compound is present or included therein in the form of a liquid or a partially liquid, said liquid or partially liquid including extracts, oils, tinctures, suspensions, dispersions, colloids, alcohols, generally non-neutral (weakly acidic or weakly basic) solutions, or combinations thereof, and is injected into, mixed with, or combined therein into a non-nicotine vapor precursor formulation. In exemplary embodiments, the non-nicotine compound is a component of the non-nicotine vapor precursor formulation. In exemplary embodiments, the non-nicotine vapor precursor formulation is a dispersion, suspension, gel, hydrogel, colloid, or combination thereof, or a part of a dispersion, suspension, gel, hydrogel, colloid, or combination thereof, and the non-nicotine compound is a component of the non-nicotine vapor precursor formulation.

[0156] In an exemplary embodiment, the non-nicotine compound undergoes a slow, natural decarboxylation process over an extended period of time at low temperatures (including at or below room temperature (72°F)). In an exemplary embodiment, if the non-nicotine compound is exposed to elevated temperatures (particularly in the range of about 175°F or higher) for a period of time (minutes or hours, at relatively low pressures, such as 1 atmosphere), the non-nicotine compound may undergo a significantly elevated decarboxylation process of 50% or higher, wherein even if the temperature is further increased (about 240°F or higher), rapid or transient decarboxylation can occur, and the decarboxylation rate may be high (50% or higher), but further increases in temperature may cause some or all of the chemical properties of the non-nicotine compound to degrade.

[0157] In exemplary embodiments, at least one non-nicotine vapor formation of the non-nicotine vapor precursor formulation comprises a diol (such as propylene glycol and / or 1,3-propanediol), glycerol, and combinations or sub-combinations thereof. Different amounts of the non-nicotine vapor formation may be used. For example, in some exemplary embodiments, the amount of at least one non-nicotine vapor formation includes a range from about 20% by weight based on the weight of the non-nicotine vapor precursor formulation to about 90% by weight based on the weight of the non-nicotine vapor precursor formulation (e.g., the non-nicotine vapor formation is in the range of about 50% to about 80%, or about 55% to 75%, or about 60% to 70%), and so on. As another example, in exemplary embodiments, the non-nicotine vapor precursor formulation comprises a weight ratio of diol to glycerol ranging from about 1:4 to 4:1, wherein the diol is propylene glycol or 1,3-propanediol or combinations thereof. In exemplary embodiments, this ratio is about 3:2. Other amounts or ranges may be used.

[0158] In an exemplary embodiment, the non-nicotine vapor precursor formulation includes water. Different amounts of water may be used. For example, in some exemplary embodiments, the amount of water may include a range from about 5% by weight to about 40% by weight of the non-nicotine vapor precursor formulation, or a range from about 10% by weight to about 15% by weight of the non-nicotine vapor precursor formulation. Other amounts or percentages may be used. For example, in an exemplary embodiment, the remainder of the non-aqueous portion of the non-nicotine vapor precursor formulation (rather than the non-nicotine compound and / or flavoring agent) is a non-nicotine vapor formation (as described above), wherein the non-nicotine vapor formation is propylene glycol between 30% and 70% by weight, and the balance of the non-nicotine vapor formation is glycerol. Other amounts or percentages may be used.

[0159] In an exemplary embodiment, the non-nicotine vapor precursor formulation includes at least one flavoring agent in an amount ranging from about 0.2% to about 15% (by weight) (e.g., the flavoring agent may range from about 1% to 12%, or about 2% to 10%, or about 5% to 8%). In an exemplary embodiment, the at least one flavoring agent may be at least one of a natural flavoring agent, an artificial flavoring agent, or a combination of natural and artificial flavoring agents. For example, the at least one flavoring agent may include menthol, wintergreen, peppermint, cinnamon, cloves, combinations thereof, and / or extracts thereof. Furthermore, flavoring agents may be included to provide herbal spices, fruit spices, nut spices, spirits spices, roasting spices, mint spices, flavoring spices, combinations thereof, and any other desired flavorings.

[0160] In an exemplary embodiment, the non-nicotine compound may be a medicinal plant or a natural component of a plant having medically acceptable therapeutic effects.

[0161] Non-nicotine vapor precursor formulations may contain non-nicotine compounds that provide medically acceptable therapeutic effects (e.g., treatment of pain, nausea, seizures, mental disorders). Details of the treatment methods can be found in U.S. Application No. 15 / 845,501, filed December 18, 2017, entitled “VAPORIZING DEVICES AND METHODS FOR DELIVERING ACOMPOUND USING THE SAME,” the disclosure of which is incorporated herein by reference in its entirety.

[0162] Exemplary embodiments have been disclosed herein, and it should be understood that other variations are possible. Such variations should not be considered as departing from the spirit and scope of the invention, and it will be apparent to those skilled in the art that all such modifications are intended to be included within the scope of the following claims.

[0163] Exemplary embodiments have been disclosed herein, and it should be understood that other variations are possible. Such variations should not be considered as departing from the spirit and scope of the invention, and it will be apparent to those skilled in the art that all such modifications are intended to be included within the scope of the following claims.

Claims

1. A non-nicotine electronic cigarette device, comprising: A non-nicotine reservoir configured to hold a non-nicotine vapor precursor formulation; A suction core configured to draw a non-nicotine vapor precursor formulation from the non-nicotine reservoir; A heating element configured to heat the non-nicotine vapor precursor formulation drawn from the non-nicotine reservoir; A probe line extending along the length of the suction core and the length of the heating element, the probe line being separated from the heating element via the suction core; A saturation sensor, the saturation sensor being configured as At the first moment, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured, said at least one electrical characteristic including resistance, capacitance, or both resistance and capacitance, and At least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured at a second time, which is after the first time. as well as Control circuitry, the control circuitry being configured to enable the non-nicotine electronic cigarette device Based on at least one electrical characteristic at the first time and at least one electrical characteristic at the second time, the refill rate of the non-nicotine vapor precursor formulation flowing onto the absorbent core is calculated. Determine that the refill rate is less than a threshold refill rate, and In response to determining that the refill rate is less than the threshold refill rate, a low non-nicotine vapor precursor formulation alarm is output.

2. The non-nicotine electronic cigarette device as described in claim 1, wherein, The control circuit is configured to cause the non-nicotine electronic cigarette device to calculate the refill rate based on the difference between at least one electrical characteristic at the first time and at least one electrical characteristic at the second time.

3. The non-nicotine electronic cigarette device as described in claim 1, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device The first impedance is calculated based on at least one electrical characteristic at the first time. The second impedance is calculated based on at least one electrical characteristic at the second time, and The refill rate is calculated based on the difference between the first impedance and the second impedance.

4. The non-nicotine electronic cigarette device as described in claim 1, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured. Determine that at least one electrical characteristic at the third time is greater than or equal to a threshold, and In response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, smoking at the non-nicotine electronic cigarette device is disabled.

5. The non-nicotine electronic cigarette device as described in claim 1, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured. Determine that at least one electrical characteristic at the third time is greater than or equal to a threshold, and In response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, an alarm for the low non-nicotine vapor precursor formulation is output.

6. The non-nicotine electronic cigarette device as claimed in claim 1, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured. The impedance of the wick is calculated based on at least one electrical characteristic at the third time. Determine that the impedance is greater than or equal to the threshold, and In response to determining that the impedance is greater than or equal to the threshold, smoking at the non-nicotine electronic cigarette device is disabled.

7. The non-nicotine electronic cigarette device as claimed in claim 1, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured. The impedance of the wick is calculated based on at least one electrical characteristic at the third time. Determine that the impedance is greater than or equal to the threshold, and In response to determining that the impedance is greater than or equal to the threshold, an alarm for the low non-nicotine vapor precursor formulation is output.

8. The non-nicotine electronic cigarette device as claimed in claim 1, further comprising: A power source configured to supply power to the non-nicotine electronic cigarette device.

9. The non-nicotine electronic cigarette device as claimed in claim 1, wherein, The probe wire is made of stainless steel.

10. A non-nicotine electronic cigarette device, comprising: outer shell; An inner tube, which is coaxially positioned within the outer shell; A non-nicotine reservoir configured to hold a non-nicotine vapor precursor formulation, the non-nicotine reservoir being positioned between the inner tube and the outer shell; A suction core configured to draw a non-nicotine vapor precursor formulation from the non-nicotine reservoir; A probe wire that surrounds the outer periphery of the inner tube; A heating element configured to heat the non-nicotine vapor precursor formulation drawn from the non-nicotine reservoir; A saturation sensor assembly configured to measure at least one electrical characteristic between the housing and the probe line at a first time and a second time, the second time being after the first time; as well as Control circuitry, the control circuitry being configured to enable the non-nicotine electronic cigarette device Based on at least one electrical characteristic at the first time and at least one electrical characteristic at the second time, Calculate the refill rate of the non-nicotine vapor precursor formulation flowing onto the absorbent core. Determine that the refill rate is less than a threshold refill rate, and In response to determining that the refill rate is less than the threshold refill rate, a low non-nicotine vapor precursor formulation alarm is output.

11. The non-nicotine electronic cigarette device of claim 10, wherein... The saturation sensor assembly is configured to measure at least one electrical characteristic between the outer casing and the inner tube by measuring at least one electrical characteristic between the outer casing and a probe line surrounding the outer periphery of the inner tube.

12. The non-nicotine electronic cigarette device of claim 11, wherein, The probe wire is made of stainless steel.

13. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to cause the non-nicotine electronic cigarette device to calculate the refill rate based on the difference between at least one electrical characteristic at the first time and at least one electrical characteristic at the second time.

14. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device The first impedance is calculated based on the electrical characteristics at the first time. The second impedance is calculated based on the electrical characteristics at the second time, and The refill rate is calculated based on the difference between the first impedance and the second impedance.

15. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the inner tube was measured. Determine that at least one electrical characteristic at the third time is greater than or equal to a threshold, and In response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, smoking at the non-nicotine electronic cigarette device is disabled.

16. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the inner tube was measured. Determine that at least one electrical characteristic at the third time is greater than or equal to a threshold, and In response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, an alarm for the low non-nicotine vapor precursor formulation is output.

17. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the inner tube was measured. The impedance of the wick is calculated based on at least one electrical characteristic at the third time. Determine that the impedance is greater than or equal to the threshold, and In response to determining that the impedance is greater than or equal to the threshold, smoking at the non-nicotine electronic cigarette device is disabled.

18. The non-nicotine electronic cigarette device of claim 10, wherein, The control circuit is configured to enable the non-nicotine electronic cigarette device At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the inner tube was measured. The impedance of the wick is calculated based on at least one electrical characteristic at the third time. Determine that the impedance is greater than or equal to the threshold, and In response to determining that the impedance is greater than or equal to the threshold, an alarm for the low non-nicotine vapor precursor formulation is output.

19. A method for detecting the depletion of a non-nicotine vapor precursor formulation in a non-nicotine reservoir of a non-nicotine electronic cigarette device, the method comprising: At a first-time measurement, at least one electrical characteristic of the wick between the heating element and the probe wire is measured. The probe wire extends along the length of the wick and the length of the heating element, and is separated from the heating element by the wick. The at least one electrical characteristic includes resistance, capacitance, or both resistance and capacitance. At least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured at a second time, which is after the first time. The refill rate of the non-nicotine vapor precursor formulation flowing onto the absorbent core is calculated based on at least one electrical property at the first time and at least one electrical property at the second time. Determine that the refill rate is less than a threshold refill rate, and In response to determining that the refill rate is less than the threshold refill rate, a low non-nicotine vapor precursor formulation alarm is output.

20. The method of claim 19, further comprising: At a third time, at least one electrical characteristic of the liquid-absorbing core between the heating element and the probe line is measured; Determine that at least one electrical characteristic at the third time is greater than or equal to a threshold; as well as In response to determining that at least one electrical characteristic at the third time is greater than or equal to the threshold, smoking at the non-nicotine electronic cigarette device is disabled.

Images