Cartridge replacement type electromagnetic atomization smoke cartridge and atomization system

Abstract

The utility model provides a cartridge changing type electromagnetic atomization cartridge atomization system which comprises a cartridge shell and a tobacco tar cavity arranged in the cartridge shell, the cartridge shell is provided with a cigarette holder and a heating end portion on the opposite side, and the heating end portion extends out of the cartridge shell. The cigarette cartridge further comprises an air channel penetrating through the cigarette cartridge shell from the heating end to the cigarette holder, and the tobacco tar cavity is arranged around the air channel. The heating end part is provided with liquid guide cotton and a magnetic heating receptor which are located in the cartridge shell, the magnetic heating receptor is provided with a hollow cavity communicated with the air channel so as to allow air flow to pass through, the liquid guide cotton is wound on the magnetic heating receptor and abuts against the cartridge shell, and the two ends of the magnetic heating receptor are connected with the cartridge shell through sealing rings; a liquid guide groove is formed between the tobacco tar cavity and the liquid guide cotton and is formed by a sealing ring and the cigarette cartridge shell. And the heating body has the advantages of no temperature sensor, fast heating body temperature rise, real-time and accurate temperature measurement and control, higher safety and the like.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic atomization in electronic cigarettes, specifically a replaceable electromagnetic atomizing cartridge and a replaceable electromagnetic atomization system. Background Technology

[0002] In the field of e-cigarette atomization, the main mechanism for heating and atomizing liquid e-liquid is resistance heating based on ceramic atomizer cores or metal mesh cores. The atomization principle is as follows: the ceramic atomizer core or metal mesh core, acting as a heating element, is placed in the e-liquid cup and electrically connected to the circuit board assembly (PCBA) via magnetic electrodes or wire bonding. Changes in the user's inhalation airflow trigger a pressure switch (such as the microphone) or a push-button switch to initiate instantaneous heating, rapidly heating and atomizing the liquid e-liquid to produce an aerosol, thus providing the user with nicotine intake.

[0003] Existing ceramic atomizer core solutions involve complex processes, including porous ceramic base molding, thick-film circuit printing, and sintering. During the assembly of e-cigarettes containing ceramic atomizer cores, electrode structures need to be designed to achieve electrical connections and minimize contact resistance, resulting in high raw material and assembly costs. Existing metal mesh core solutions typically use a slender stainless steel base tube to carry a resistive heating wire or heating mesh and welded leads to form the assembly. The stainless steel base tube requires multiple openings and undergoes multiple machining and polishing passivation processes, leading to high material and processing costs. Furthermore, repeated heating can generate a thin oxide layer on its surface, which can chemically react with the liquid e-liquid, affecting atomization performance.

[0004] This invention proposes a cartridge-type electromagnetic atomizing electronic cigarette, aiming to solve the above-mentioned problems. It achieves efficient and precise temperature control through non-contact electromagnetic induction heating, thereby improving the user experience. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a replaceable electromagnetic atomizing cartridge, comprising a cartridge shell and an internal e-liquid chamber. The cartridge shell has a mouthpiece and a heating end on one side, the heating end extending beyond the cartridge shell. It also includes an air passage penetrating the cartridge shell from the heating end to the mouthpiece, with the e-liquid chamber surrounding the air passage. The heating end is provided with a liquid-guiding cotton and a magnetic heating sensor located within the cartridge shell. The magnetic heating sensor has a hollow cavity communicating with the air passage to allow airflow. The liquid-guiding cotton is surrounding the magnetic heating sensor and abuts against the cartridge shell. Both ends of the magnetic heating sensor are connected to the cartridge shell via sealing rings. A liquid-guiding groove is provided between the e-liquid chamber and the liquid-guiding cotton, formed by the sealing ring and the cartridge shell.

[0006] Furthermore, the magnetic heating sensor is configured as a ring-shaped or arc-shaped cylinder with a hollow interior forming an airflow channel.

[0007] Furthermore, the annular or arc-shaped cylindrical side has an opening, and the fluid-guiding cotton covers the opening.

[0008] Furthermore, a vent is formed on the magnetic heating sensor that is connected to the airflow channel.

[0009] Furthermore, the sealing ring abuts against the cartridge shell, the magnetic heating sensor, and the liquid-guiding cotton to form a liquid-guiding groove.

[0010] Furthermore, the liquid-guiding cotton is squeezed between the cartridge shell and the magnetic heating sensor, and the degree of compression is adjusted by the magnetic heating sensor to regulate the amount of smoke.

[0011] This utility model also provides a replaceable electromagnetic atomization system, including the aforementioned replaceable electromagnetic atomizing cartridge, and a cigarette rod with a recessed receiving part. A coil is wound around the peripheral wall of the receiving part, and the replaceable electromagnetic atomizing cartridge is inserted into the receiving part.

[0012] Furthermore, the coil initiates heating when it senses suction.

[0013] Furthermore, both the bottom of the replaceable electromagnetic atomizing cartridge and the bottom of the cigarette holder are equipped with magnetic magnets.

[0014] Furthermore, the airflow enters the air passage through the joint gap between the cartridge shell and the receiver of the cigarette rod, or through the air gap reserved inside the cigarette rod.

[0015] Compared with existing technologies, the advantages of this invention are: it employs an electromagnetic atomizing cartridge and atomization system with a cartridge-changing function. Upon sensing inhalation, the system activates, and the magnetic heating sensor in the cartridge couples with the central ring of the cigarette holder to generate eddy current heating, thereby atomizing the e-liquid in the liquid-guiding cotton. This design changes the traditional resistance or contact heating method, thus offering advantages such as no temperature sensor required, rapid heating of the heating element, real-time accurate temperature measurement and control, and enhanced safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a cartridge-type electromagnetic atomization system.

[0017] Figure 2 This is a schematic diagram of the structure of a replaceable electromagnetic atomizing cigarette cartridge;

[0018] Figure 3 This is a schematic diagram of the magnetic heating sensor in Example 1;

[0019] Figure 4 This is a schematic diagram of the processing procedure for the magnetic heating sensor in Example 1;

[0020] Figure 5 This is a schematic diagram of the magnetic heating sensor structure in Example 2;

[0021] Figure 6 This is a magnetization curve of the magnetic heating sensor in Example 2;

[0022] Figure 7 This is the manufacturing method of the magnetic heating sensor in Example 2. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 The illustrated pod-based electronic cigarette atomization system includes a cigarette holder 1 and a pod-based electromagnetic atomizing cartridge 2 (hereinafter referred to as "cartridge"). The cigarette holder 1 has a recessed receiving section 101 at its upper part to receive the replaceable cartridge. A coil 102 is wound around the periphery of the receiving section 101, and the pod-based electromagnetic atomizing cartridge 2 is inserted into the receiving section 101. A magnetic magnet is provided at the bottom of the receiving section 101 within the cigarette holder 1 to attract and secure the cartridge.

[0025] The cartridge 2 includes a cartridge shell and an internal e-liquid chamber, as shown in the reference. Figure 1 and Figure 2 The cartridge shell consists of a lower shell 206 and an upper shell 208, which are joined together by physical methods such as fastening, bonding, or ultrasonic bonding. To minimize e-liquid leakage, a first silicone ring 207 seals the joint. On the opposite side of the cartridge mouthpiece, a heating end is provided, extending outwards from the cartridge shell to form an outward-protruding structure. The upper shell 208 serves as the mouthpiece for the user. The lower shell 206 contains an e-liquid chamber 209 with a volume. An air passage 210 is pre-formed longitudinally inside the cartridge shell, communicating with the inhalation port 212 inside the mouthpiece. The air passage 210 extends throughout the entire cartridge, allowing airflow from bottom to top. The cross-sectional shape of the air passage 210 can be circular, elliptical, triangular, square, or other shapes. The e-liquid chamber 209 surrounding the air passage 210 is designed in a ring-like shape to increase volume and facilitate atomization.

[0026] The aforementioned heating end includes a ring-shaped magnetic heating sensor 202 and a liquid-guiding cotton 203. The magnetic heating sensor 202 is wound to form a hollow cylindrical shape and has a hollow cavity communicating with the air passage 210 to allow airflow to be heated and flow through. The liquid-guiding cotton 203 is wound around the magnetic heating sensor 202 to form a complete or partial covering. When assembled into the cartridge shell, it also abuts against the cartridge shell to form a lateral fixation.

[0027] It should be noted that the liquid-guiding cotton 203 is typically compressed between the lower shell 206 of the cartridge and the magnetic heating sensor 202. The degree of compression is adjusted by the magnetic heating sensor 202 to regulate the amount of vapor. Specifically, if a large amount of vapor and e-liquid penetration is required, the equivalent outer diameter of the magnetic heating sensor 202 is made larger to severely compress the liquid-guiding cotton 203, forming a penetration channel with lower porosity. If a small amount of vapor and e-liquid penetration is required, the equivalent outer diameter of the magnetic heating sensor 202 is made smaller to release the liquid-guiding cotton 203 or minimize its accumulation, forming a penetration channel with higher porosity.

[0028] Following the foregoing, the magnetic heating sensor 202 is sealed and longitudinally fixed to the lower housing 206 via the second silicone ring 205 and the third silicone ring 204. Specifically, the second silicone ring 205 is fitted onto the first end of the magnetic heating sensor 202 to prevent it from falling off, and the other end of the second silicone ring 205 is fixed to the housing near the e-liquid chamber 209 (around the air passage 210). The second silicone ring 205 is a custom-made irregular shape, designed to conform to the shape of the channel structure. A liquid guide groove 211 leading to the heating end is also provided at the junction of the e-liquid chamber 209 and the second silicone ring 205. Furthermore, the second silicone ring 205 abuts against the lower housing 206, the magnetic heating sensor 202, and the liquid guide cotton 203 to form the liquid guide groove 211. Under the action of gravity, the e-liquid in the e-liquid chamber 209 is continuously deposited onto the liquid guide cotton 203 through the liquid guide groove 211.

[0029] The third silicone ring 204 is fitted onto the second end of the magnetic heating sensor 202. Following the installation method of the second silicone ring 205, it is arranged almost flush with the end of the heating end, serving both to fix the device and to prevent e-liquid leakage.

[0030] The longitudinal axes of the device 1 and the cartridge 2 are basically coincident. The hollow cavity of the magnetic heating sensor 202 and the airway 210 are basically on the same axis. The aerosol formed by heating flows sequentially towards the user along the arrows shown in the figure. Corresponding to the magnet 201 inside the device 1, several magnets 103 are provided at the bottom of the cartridge to complete the adsorption and fixation, preventing involuntary detachment during use.

[0031] In the actual atomization process, the general process is as follows: When inhaling, changes in air pressure within the airway trigger the airflow sensor (microphone) or switch to activate the control circuit module. The control circuit module then drives the coil to generate a high-frequency alternating electromagnetic field. Specifically, the coil initiates heating upon sensing inhalation. This electromagnetic field couples with a magnetic sensor in the cartridge, inducing eddy currents within the sensor. The Joule heating generated by these eddy currents rapidly heats the sensor, transferring the heat to the nearby e-liquid and rapidly atomizing it. External airflow enters the airway through the gap between the cartridge shell and the receiver of the e-liquid, or through a pre-existing air gap inside the e-liquid, generating an aerosol that enters the user's mouth via the dotted arrow shown in the diagram.

[0032] Example 1

[0033] In this embodiment, the coil 102 of the atomizing system used in the aforementioned e-cigarette cartridge is a spiral tubular coil wound with copper strip. The copper strip is 0.1 mm thick, 1.6 mm wide, with a winding spacing of 1.6 mm and 5 turns. The outer diameter of the coil is 12 mm, and the frequency of the Class E power amplifier resonant inverter circuit is fixed at 5 MHz. This compact coil winding and high-frequency setting allows for high system efficiency, for example, reaching 85%. Generally, the smaller the coil winding volume, the higher the system resonant frequency, the higher the efficiency, and the better the heating effect. Therefore, this invention sets the internal volume of the coil winding to 600-20,000 mm². 3 Within this range, the operating frequency is set in the range of 100K-10MHz.

[0034] like Figure 3 As shown, the magnetic heating sensor 202 is a slender magnetic metal tube (cylindrical, annular, elliptical, etc.) with its sides closed, and the liquid-guiding cotton 203 is wholly or partially wound around its periphery. The tube has an inner diameter of 2.6 mm, a length of 15 mm, and a wall thickness of 0.1 mm. The tube wall 202a is made of ferritic magnetic stainless steel SUS430, a single alloy material. Its main chemical components include: 17% chromium, 0.1% carbon, 0.5% silicon, 0.6% manganese, 0.03% nickel, 0.03% phosphorus, and the balance iron. Its Curie temperature is approximately 770℃. Multiple rectangular vent holes 202b, laser-cut, are provided on the side for the introduction of e-liquid and the flow of aerosol. The liquid-guiding cotton 203 is preferably made of high-temperature resistant cotton non-woven fabric with a high-porosity three-dimensional network cross-linked structure, exhibiting strong adsorption and flame retardancy, meeting the functional requirements of this embodiment.

[0035] Under the excitation of a high-frequency alternating magnetic field, a skin effect occurs, meaning that eddy current electrons mainly move within a few micrometers of the surface thickness of the magnetic heating sensor 202. On the one hand, the thinner the wall thickness of the magnetic heating sensor 202, the better, as it reduces its volume and specific heat capacity, and lowers material costs. On the other hand, from a manufacturability perspective, forming processes such as rolling and tube drawing with a thickness below 0.04 mm are difficult. Therefore, the average wall thickness of the magnetic heating sensor 202 is preferably set in the range of 0.04-0.2 mm, which achieves better practical results.

[0036] like Figure 4 As shown, the manufacturing process of the magnetic heating sensor 202 in this embodiment is as follows:

[0037] S1: Process metal sheet into strips with a thickness of 0.15mm and a width of 15mm;

[0038] S2: Bend the strip so that the curved ends contact and weld it into a thick tube;

[0039] S3: Multiple annealing and drawing processes are performed to prepare a thin tube with a smaller inner diameter and thinner wall thickness;

[0040] S4: Multiple vent holes 202b are prepared on the pipe wall using laser cutting method;

[0041] S5: Cut the slender tube laterally into metal tubes of the desired length.

[0042] Example 2

[0043] This embodiment proposes a method such as Figure 5 The tubular magnetic sensor 202 shown has an open-ended side profile, with an equivalent inner diameter of 3 mm and a length of 12 mm. The tube wall 202a has a thickness of 0.08 mm and multiple circular vent holes 202b, each 1 mm in diameter, formed by chemical etching. The tube wall 202a also has elongated openings 202c, creating an open structure. This configuration is simple to manufacture and requires less precision, making it suitable for mass production. In actual use, however, it is still necessary to cover the gaps or openings with a liquid-guiding cotton 203 to prevent leakage of e-liquid.

[0044] In one embodiment, the substrate 202a is made of iron-nickel based soft magnetic alloy 4J42 in a soft state. Its main chemical composition includes: 42% nickel, 1% cobalt, 0.05% carbon, 0.30% silicon, 0.80% manganese, 0.1% aluminum, and the balance iron. This alloy exhibits strong magnetic properties; at 4,000 A / m, its remanent magnetic induction Br is 0.99 T, and its coercivity Hc is 28.8 A / m. It can achieve rapid and strong eddy current heating in a high-frequency alternating magnetic field. Furthermore, the material has a thermal conductivity of 14.6 W / (m·K), which allows for rapid transfer of eddy current Joule heat to the liquid-conducting core 203 in contact with it.

[0045] To further illustrate, the magnetization curve (MT, i.e., the relationship between intensity emu / g and absolute temperature K) of the 4J42 sensor alloy is as follows: Figure 6 As shown. This alloy is a strongly magnetic metal that maintains strong and stable magnetism up to 300℃, allowing it to maintain strong and stable coupling with the high-frequency alternating magnetic field generated by the coil in the smoke stick, enabling continuous operation. Based on the peak-valley characteristics of the relationship between magnetization intensity and temperature change rate dM / dT and temperature change T, its Curie temperature Tc is approximately 400℃. This relatively low Curie temperature can be used as a temperature control parameter for electronic circuit systems. Referring to the method mentioned in the present invention's patent application CN116491712A, the permeability of the soft magnetic alloy material will show an inflection point about 100℃ away from the Curie temperature Tc (i.e., the aforementioned 300℃), and the permeability will begin to decrease until it completely loses its magnetism at 400℃. This peak change characteristic is fed back through the coil and ultimately mapped to the current peak change characteristic of the circuit system, serving as a reference for real-time temperature measurement and precise temperature control. Thus, during each puff, the temperature of the magnetic sensor 202 can be controlled at a consistent temperature level, for example, to the left or right of this inflection point temperature of 300℃. Based on this, a precise value can be set within the range of 200-350℃, which is just right for the atomization of common e-liquids.

[0046] Based on this approach, precise temperature control can be achieved by utilizing the Curie point characteristics of magnetic materials and changes in coil impedance. Furthermore, when the sensor temperature approaches its Curie temperature, the permeability decreases sharply, the eddy current effect weakens, and heat generation decreases, thus achieving passive temperature control and preventing overheating. On the other hand, changes in sensor temperature cause changes in coil impedance. The control circuit module indirectly measures the sensor temperature by monitoring these changes in real time and dynamically adjusts parameters such as the frequency and duty cycle of the drive current to achieve active temperature control, maintaining the atomization temperature within the optimal range.

[0047] like Figure 7 As shown, the manufacturing process of the magnetic heating sensor 202 in this embodiment is as follows:

[0048] S1: A large number of predetermined vent holes 202b are formed by etching a metal sheet through processes such as film coating, exposure, chemical etching and cleaning;

[0049] S2: Cut the substrate unit to the preset size;

[0050] S3: Bending the strip into a tubular shape (with an opening or a notch that is not fully closed).

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A refill type electromagnetic atomization cartridge, comprising a cartridge shell and an inner set of tobacco tar cavity, characterized in that, The cartridge shell has a mouthpiece and a heating end opposite to the mouthpiece, the heating end extends out of the cartridge shell; the cartridge shell further comprises an air passage extending through the cartridge shell from the heating end to the mouthpiece, and a tobacco oil cavity is arranged around the air passage; The heating end is provided with a liquid guide cotton arranged in the cartridge shell and a magnetic heating susceptor, the magnetic heating susceptor has a hollow cavity in communication with the air passage to allow airflow to pass through, the liquid guide cotton is arranged around the magnetic heating susceptor and abuts against the cartridge shell, and the magnetic heating susceptor is connected to the cartridge shell by a sealing ring at both ends. A liquid guide groove is arranged between the tobacco oil cavity and the liquid guide cotton, and the liquid guide groove is formed by the sealing ring and the cartridge shell. 2.The refill-type electromagnetic atomization cartridge of claim 1, wherein, The magnetic heating susceptor is configured in a ring-shaped or arc-shaped cylindrical shape, and an airflow passage is formed in the hollow interior. 3.The refill-type electromagnetic atomization cartridge of claim 2, wherein, The ring-shaped or arc-shaped cylindrical side has an opening, and the liquid guide cotton covers the opening. 4.The refill-type electromagnetic atomizing cartridge of claim 1, wherein, Air holes are formed on the magnetic heating susceptor and communicate with the airflow passage. 5.The refill-type electromagnetic atomization cartridge of claim 1, wherein, The sealing ring abuts against the cartridge shell, the magnetic heating susceptor and the liquid guide cotton to form the liquid guide groove. 6.The refill-type electromagnetic atomization cartridge of claim 1, wherein, The liquid guide cotton is arranged between the cartridge shell and the magnetic heating susceptor and is squeezed, and the degree of squeezing is adjusted by the magnetic heating susceptor to adjust the amount of smoke.

7. A refillable electromagnetic atomization system, characterized in that, The cartridge shell further comprises a tobacco rod having a recessed receiving portion, a coil is arranged around the wall of the receiving portion, and the cartridge is inserted into the receiving portion. 8.The refill type electromagnetic atomization system of claim 7, wherein, The coil starts heating work when sensing suction. 9.The refill type electromagnetic atomization system of claim 7, wherein, Magnetic magnets are arranged at the bottom of the cartridge and the bottom of the receiving portion of the tobacco rod. 10.The refill type electromagnetic atomization system of claim 7, wherein, Airflow enters the air passage through the joint gap between the cartridge shell and the receiving portion of the tobacco rod or the air gap reserved in the tobacco rod.

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