A method for adaptive e-liquid supply in electronic cigarettes

Abstract

This invention provides a method for adaptive e-liquid supply in electronic cigarettes. The atomizing core of the electronic cigarette consists of a heating wire, wicking fibers, a bimetallic spiral, and a metal pin. The heating wire is wrapped around the wicking fibers, and the bimetallic spiral is formed by a bimetallic strip spirally wrapping around the heating wire and wicking fibers. The bimetallic strip has holes, through which the metal pin penetrates the wicking fibers. When the user smokes continuously, the heating wire heats up for a long time, causing the spiral bimetallic strip to expand slightly. The expanded wicking fibers have a larger capillary cross-sectional area, facilitating a greater flow of e-liquid to the heating wire. Simultaneously, a surface tension gradient is generated, further aiding fluid flow and facilitating e-liquid supply. When the user smokes briefly, the heating wire heats up for a short time, and the spiral bimetallic strip and metal pin do not yet show a significant temperature rise, resulting in a smaller e-liquid supply from the wicking fibers. This achieves the technical effect of automatically adapting the e-liquid supply to the user's smoking habits.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarette technology, and more particularly to a method for adaptive e-liquid supply in electronic cigarettes. Background Technology

[0002] The atomizer core of an e-cigarette consists of a heating wire and wicking fibers. The wicking fibers are bundled together, and the heating wire is spirally wound around these bundles. The atomizer core is immersed in e-liquid. When electricity is applied to the heating wire, the e-liquid is heated, atomizing and producing vapor and negative pressure. This vapor is inhaled by the user. The wicking fibers provide capillary channels for the e-liquid, allowing it to flow towards the area where the heating wire is wrapped, under capillary action and negative pressure. For a long time, the technology of e-cigarette atomizer cores has presented a contradiction: for a fixed technical setting, such as a fixed circumference of the bundled wicking fibers, a fixed heating wire length, and power, prolonged vigorous inhalation can result in insufficient e-liquid supply from the wicking fibers, leading to thin vapor; while short, light inhalations can result in thick, choking vapor, causing coughing and wheezing. Thus, to cater to customers with different smoking habits, different e-cigarette manufacturers, or even the same manufacturer, will produce products with varying atomization rates. Those with long-circumference bundled wicking fibers and numerous coils of heating wire can satisfy customers who want to inhale deeply for extended periods, while those with shorter, lighter coils can satisfy customers who want to inhale lightly for short periods. This difficulty in satisfying diverse preferences has long plagued e-cigarette suppliers. Solving this contradiction in the e-cigarette industry requires those skilled in the art to delve into the underlying principles of capillary effects. After a long period of technical accumulation and in-depth thinking, the inventor finally gained inspiration and, after numerous trials and improvements, finally created the complete technology of this invention. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention attempts to overcome the above defects. Therefore, the present invention provides an adaptive e-liquid supply method for electronic cigarettes, which solves the problem of mutual adaptation between smoking habits and e-liquid supply structure.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for adaptive oil supply in electronic cigarettes, wherein the atomizing core of the electronic cigarette is composed of a heating wire, an oil-guiding fiber, a bimetallic spiral plate, and a metal pin. The heating wire is wrapped around the oil-guiding fiber, and the bimetallic spiral plate is a bimetallic sheet that is spirally wrapped around the heating wire and the oil-guiding fiber. The bimetallic sheet has holes, and the metal pin passes through the holes and inserts into the oil-guiding fiber. The tail of the metal pin is connected to the bimetallic sheet.

[0005] Furthermore, the metal pin pierces the oil-conducting fiber through the hole at a location where there is no heating wire.

[0006] Furthermore, the bimetallic spiral is loosely wound where there is a heating wire and tightly wound where there is no heating wire.

[0007] Furthermore, the active layer of the thermal bimetallic strip is close to the oil-conducting fiber.

[0008] Furthermore, the oil-wicking fiber is made of cotton fiber.

[0009] Furthermore, the hot bimetallic sheet is made into sections of roll material by a three-roll bending method. Each section of roll material can wrap around an atomizing core of an electronic cigarette. During the three-roll bending process, the hot bimetallic sheet is cooled by pouring a low-temperature freezing liquid, which is an antifreeze with a temperature of -20 to -40 degrees Celsius.

[0010] Furthermore, the oil-guiding fibers are bundled, and the circumference of the bundled oil-guiding fibers in their natural state is 2-5 times the circumference after being wrapped with the heating wire.

[0011] Furthermore, the metal pins are made of brass and are gold-plated.

[0012] Furthermore, the holes in the thermal bimetallic strip are obtained through laser drilling.

[0013] Furthermore, the manufacturing method of the atomizing core of the electronic cigarette is as follows: S1: cut a section of fiber to become an oil-guiding fiber; S2: wrap a heating wire around the middle position of the oil-guiding fiber; S3: wrap the fiber with a bimetallic spiral and insert a metal pin through the hole into the oil-guiding fiber to fix the bimetallic spiral.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The metal pin, piercing through the holes into the wicking fiber, improves the temperature gradient of the e-liquid within the fiber, transforming the steep gradient at the edge of the heating coil into a gentler gradient. This also alters the surface tension of the e-liquid at different locations, creating a surface tension gradient that drives fluid flow. This surface tension gradient propels the e-liquid from lower to higher temperature zones. Previously, this effect only occurred near the edge of the heating coil; now it occurs further away from the heating coil, providing additional impetus for e-liquid flow. The bimetallic strip has holes through which the metal pin pierces the wicking fiber. When the heating coil is energized, the spiral-shaped bimetallic strip undergoes minute expansion and deformation. This expansion and deformation is amplified by the leverage effect of the metal pin, which disturbs the interior of the wicking fiber, promoting better e-liquid flow. Furthermore, during the intermittent temperature changes between energizing and de-energizing the heating coil, the spiral-shaped bimetallic strip undergoes minute expansion and contraction, compressing and relaxing the internal wicking fiber. The intermittent pressure acts as a force, driving the e-liquid flow. When a user smokes, the heating coil is energized to atomize the e-liquid. Negative pressure is generated at the wicking fiber section of the heating coil, simultaneously heating the spiral-shaped bimetallic strip, causing it to expand slightly. This expansion increases the capillary cross-sectional area of ​​the wicking fiber, facilitating a greater flow of e-liquid to the heating coil. The resulting surface tension gradient further enhances fluid flow and e-liquid supply. This self-adaptability is achieved when the user smokes continuously, as the heating coil heats for a longer period, causing the spiral-shaped bimetallic strip to expand slightly. The increased capillary cross-sectional area of ​​the expanded wicking fiber further facilitates a greater flow of e-liquid to the heating coil and the surface tension gradient further enhances fluid flow. Conversely, when the user smokes briefly, the heating coil heats for a shorter period, and the spiral-shaped bimetallic strip and metal pin do not yet show significant temperature rise, resulting in a smaller e-liquid supply from the wicking fiber. This automatic adaptation to the user's smoking habits solves the technical limitations of existing technologies.The principles behind each technical detail are described below: 1. Technical Detail: The metal pin pierces the oil-guiding fiber through the hole at the location without the heating wire. Technical Principle and Function: The metal pin serves to fix the bimetallic strip in a spiral shape. 2. Technical Detail: The bimetallic spiral strip is loosely wound where there is a heating wire and tightly wound where there is no heating wire. Technical Principle and Function: Tight winding increases the pressure on the oil-guiding fiber when the helical bimetallic strip contracts and expands, while loose winding facilitates the escape of smoke from the heating wire location. 3. Technical Detail: The active layer of the bimetallic strip is close to the oil-guiding fiber... Technical Principles and Functions: 4. Technical Details: The active layer expands radially outward upon heating, exhibiting better deformation amplitude compared to the passive layer's placement closer to the wicking fibers; 5. Technical Details: The wicking fibers are made of cotton fiber. Technical Principles and Functions: Cotton fiber is the material with the best atomization flavor among all wicking fibers; 6. Technical Details: The thermal bimetallic strip is formed into sections of roll material using a three-roll bending method. Each section of roll material can wrap around an e-cigarette's atomizing core. Technical Principles and Functions: Three-roll bending is a suitable method for producing roll materials with small curvatures; 7. Technical Details: During three-roll bending, the thermal bimetallic strip is cooled. The process involves pouring a cryogenic liquid, specifically antifreeze, at a temperature of -20 to -40 degrees Celsius. The technical principle and function are as follows: At low temperatures, the bimetallic strip is bent, thickening the active layer near the oil-conducting fibers and generating more thermal stress, which is beneficial for the radial deformation of the spiral-shaped bimetallic strip during heating. 7. Technical details: The oil-conducting fibers are bundled. The circumference of the bundled oil-conducting fibers in their natural state is 2-5 times the circumference after being wrapped with the heating wire. The technical principle and function are as follows: After the bundled oil-conducting fibers wrap around the heating wire, their circumference shrinks, forming capillary channels between adjacent oil-conducting fibers. Too tight or too loose a wrapping is detrimental to capillary transport. A ratio of 2-5 times is the preferred option; 8. Technical details: The metal pins are made of brass with a gold-plated surface. Technical principle and function: Gold-plated brass has excellent corrosion resistance and thermal conductivity. Brass has excellent rigidity, which can amplify the radial deformation of the bimetallic strip during heating. Brass pins are a commonly used component of connectors, with mature production lines and low procurement prices, which is beneficial to cost; 8. Technical details: The holes in the bimetallic strip are obtained by laser drilling. Technical principle and function: Laser drilling is low-cost and fast. In particular, femtosecond laser drilling causes little thermal damage to the material and is less likely to damage the connection between the active and passive layers of the bimetallic strip. Attached Figure Description

[0015] Figure 1 A schematic diagram of the longitudinal section of the atomizing core; Figure 2 A schematic diagram of the cross-section of a hot bimetallic strip bent by three rollers; In the diagram: 1. Heating wire; 2. Oil-guiding fiber; 3. Bimetallic spiral blade; 4. Metal pin; 5. Roller. Detailed Implementation

[0016] This invention provides a method for adaptive e-liquid supply in electronic cigarettes, such as... Figure 1-2 As shown, the atomizing core of an electronic cigarette consists of a heating wire 1, an oil-guiding fiber 2, a bimetallic spiral 3, and a metal pin 4. The heating wire 1 is wrapped around the oil-guiding fiber 2. The bimetallic spiral 3 is a bimetallic sheet that is spirally wrapped around the heating wire 1 and the oil-guiding fiber 2. The bimetallic sheet has holes, and the metal pin 4 passes through the holes and pierces the oil-guiding fiber 2. The tail of the metal pin 4 is connected to the bimetallic sheet. The position where the metal pin 4 passes through the holes and pierces the oil-guiding fiber 2 is where there is no heating wire 1. The bimetallic spiral 3 is loosely wound where there is heating wire 1 and tightly wound where there is no heating wire 1. The active layer of the bimetallic sheet is close to the oil-guiding fiber 2. The oil-guiding fiber 2 is made of cotton fiber. The bimetallic sheet is made into sections of roll material by a three-roll bending method. Each section of roll material can wrap around one electronic cigarette. When the atomizing core of the e-cigarette is bent by three rollers, the bimetallic strip is cooled down. The method of cooling the bimetallic strip is to pour a low-temperature freezing liquid, which is antifreeze with a temperature of -20 to -40 degrees Celsius. The oil-guiding fiber 2 is bundled. The circumference of the bundled oil-guiding fiber 2 in its natural state is 2 to 5 times the circumference after being wrapped by the heating wire 1. The metal pin 4 is made of brass with a gold-plated surface. The holes in the bimetallic strip are obtained by laser drilling. The manufacturing method of the atomizing core of the e-cigarette is as follows: S1: Cut a section of fiber to become the oil-guiding fiber 2; S2: Wrap the heating wire 1 around the middle position of the oil-guiding fiber 2; S3: Wrap it with the bimetallic spiral 3, and insert the metal pin 4 through the hole into the oil-guiding fiber 2 to fix the bimetallic spiral 3.

[0017] Working Principle: The metal pin 4, penetrating the holes into the wicking fiber 2, improves the temperature gradient of the e-liquid within the fiber 2, transforming the steep gradient at the edge of the heating coil 1 into a gentler gradient. Simultaneously, it alters the surface tension of the e-liquid at different locations, creating a surface tension gradient that drives fluid flow. This surface tension gradient propels the e-liquid from the low-temperature zone to the high-temperature zone. Previously, this effect only occurred near the edge of the heating coil 1; now it occurs further away from the heating coil 1, providing additional impetus for e-liquid flow. The bimetallic strip has holes through which the metal pin 4 penetrates the wicking fiber 2. When the heating coil 1 is energized, the spiral-shaped bimetallic strip undergoes minute expansion deformation. This expansion deformation is amplified by the leverage effect of the metal pin 4, which disturbs the interior of the wicking fiber 2, promoting better e-liquid flow. Furthermore, during the intermittent temperature changes of the heating coil 1 between energization and de-energization, the spiral-shaped bimetallic strip undergoes minute expansion and contraction, squeezing the internal wicking fiber 2. The intermittent pressure of pressing and relaxing acts to drive the e-liquid flow. When the user smokes, the heating wire 1 is energized to heat the e-liquid and atomize it. A negative pressure is generated at the wicking fiber 2 wrapped around the heating wire 1, simultaneously heating the spiral-shaped bimetallic strip, causing it to expand slightly. The expanded wicking fiber 2 has a larger capillary cross-sectional area, facilitating a greater flow of e-liquid to the heating wire 1. This also creates a surface tension gradient, further aiding in e-liquid supply. This self-adaptability is achieved: when the user smokes continuously, the heating wire 1 heats for a longer time, causing the spiral-shaped bimetallic strip to expand slightly. The expanded wicking fiber 2 has a larger capillary cross-sectional area, facilitating a greater flow of e-liquid to the heating wire 1. This surface tension gradient further aids in e-liquid supply. When the user smokes briefly, the heating wire 1 heats for a shorter time, and the spiral-shaped bimetallic strip and metal pin 4 do not yet show a significant temperature rise, resulting in a smaller e-liquid supply from the wicking fiber 2. This creates a technical effect of automatically adapting to the user's smoking habits and supplying e-liquid, solving the technical difficulties of existing technologies. The principles of each technical detail are described below: 1. Technical details: The metal pin 4 passes through the hole and inserts into the oil-conducting fiber 2 at a location where there is no heating wire 1. Technical principle: The metal pin 4 serves to fix the bimetallic strip in a spiral shape.2. Technical Details: The bimetallic spiral fin 3 is loosely wound where the heating wire 1 is located, and tightly wound where the heating wire 1 is not located. Technical Principle: Tight winding increases the pressure on the oil-guiding fiber 2 during the contraction and expansion of the spiral-shaped bimetallic fin, while loose winding facilitates the escape of smoke from the location of the heating wire 1. 3. Technical Details: The active layer of the bimetallic fin is close to the oil-guiding fiber 2. Technical Principle: The active layer expands radially outward when heated, providing a better deformation range compared to a passive layer positioned close to the oil-guiding fiber 2. 4. Technical Details: Oil-guiding fiber... 2. Material: Cotton fiber. Technical principle: Cotton fiber is the material with the best atomization flavor among all wicking fibers. 5. Technical details: The hot bimetallic strip is made into sections of roll material using a three-roll bending method. Each section of roll material can wrap around an e-cigarette atomizing core. Technical principle: Three-roll bending is a suitable method for making roll materials with small curvatures. 6. Technical details: During three-roll bending, the hot bimetallic strip is cooled by pouring a low-temperature freezing liquid, which is antifreeze with a temperature of -20 to -40 degrees Celsius. Theory: Bending the bimetallic strip at low temperature thickens the active layer near the oil-conducting fiber 2, generating more thermal stress, which is beneficial for the radial deformation of the spiral bimetallic strip during heating; 7. Technical details: The oil-conducting fiber 2 is bundled, and the circumference of the bundled oil-conducting fiber 2 in its natural state is 2-5 times the circumference after being wrapped by the heating wire 1. Technical principle: After the bundled oil-conducting fiber 2 wraps around the heating wire 1, its circumference shrinks, and capillary channels are formed between adjacent oil-conducting fibers 2. Too tight or too loose is not conducive to capillary transport effect; a ratio of 2-5 times is the preferred solution; 8. Technology Details: The metal pin 4 is made of brass with a gold-plated surface. Technical principle: Gold-plated brass has excellent corrosion resistance and thermal conductivity. Brass has excellent rigidity, which can amplify the radial deformation of the bimetallic strip during heating. Brass pins are a common component of connectors, with mature production lines and low procurement prices, which is beneficial to cost. 8. Technical details: The holes in the bimetallic strip are obtained by laser drilling. Technical principle: Laser drilling is low-cost and fast. In particular, femtosecond laser drilling causes little thermal damage to the material and is less likely to damage the connection between the active and passive layers of the bimetallic strip.

[0018] Engineering Examples Purchase 0.45 mm diameter, 5.0 mm length, all-copper gold-plated pins; purchase 5J20110 type bimetallic strips from a Taobao website and customize them. The bimetallic strip is 0.1 mm thick and 2 mm wide. Use a laser drilling machine to drill a hole with a diameter of 0.45 mm in the middle of the width of the bimetallic strip. Along the long axis of the bimetallic strip, the distance between adjacent holes is 4 mm. Figure 2As shown, a three-roll bending method is used to bend the bimetallic strip into a coiled strip with a diameter of 3 mm. During bending, antifreeze at -40 degrees Celsius is poured on to cool it. A 1.5 cm long, naturally fluffy cotton thread with a diameter of 5 mm is taken, and a section of heating wire is wrapped around its center. The diameter of the wrapped portion is 2.5 mm, and the length is 4 mm. The coiled cotton thread is then wrapped around the thread, and a pin is inserted into a hole in the bimetallic strip to secure the wrapping. The excess end of the pin that is not inserted is cut off with pliers. Figure 1 The atomizing core shown is integrated into an electronic cigarette, achieving the technical objective of this invention. When placed in pure transparent e-liquid, between energizing and de-energizing the heating coil, the spiral-shaped bimetallic strip can be visually observed to undergo minute expansion and contraction deformations, with the changes at the end of the cotton thread being more pronounced.

[0019] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the inventive concept, they should all fall within the protection scope of the present invention.

Claims

1. A method for adaptive e-liquid supply in electronic cigarettes, characterized in that: The atomizing core of the electronic cigarette consists of a heating wire (1), an oil-guiding fiber (2), a bimetallic spiral (3), and a metal pin (4). The heating wire (1) wraps around the oil-guiding fiber (2). The bimetallic spiral (3) is a bimetallic sheet that wraps around the heating wire (1) and the oil-guiding fiber (2) in a spiral state. The bimetallic sheet has holes. The metal pin (4) passes through the holes and inserts into the oil-guiding fiber (2). The tail of the metal pin (4) is connected to the bimetallic sheet.

2. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The metal pin (4) passes through the hole and inserts into the oil-conducting fiber (2) at a location where there is no heating wire (1).

3. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The bimetallic spiral (3) is loosely wound where there is a heating wire (1) and tightly wound where there is no heating wire (1).

4. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The active layer of the thermal bimetallic sheet is close to the oil-conducting fiber (2).

5. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The oil-guiding fiber (2) is made of cotton fiber.

6. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The hot bimetallic sheet is made into sections of roll material by a three-roll bending method. Each section of roll material can wrap around an atomizing core of an electronic cigarette. During the three-roll bending process, the hot bimetallic sheet is cooled by pouring a low-temperature freezing liquid, which is an antifreeze with a temperature of -20 to -40 degrees Celsius.

7. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The oil-guiding fiber (2) is in bundle form, and the circumference of the bundled oil-guiding fiber (2) in its natural state is 2-5 times the circumference after being wrapped by the heating wire (1).

8. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The metal pin (4) is made of brass and is plated with gold.

9. The method for adaptive e-liquid supply in electronic cigarettes according to claim 1, characterized in that: The holes in the thermal bimetallic strip are obtained by laser drilling.

10. The method for adaptive e-liquid supply in an electronic cigarette according to claim 1, characterized in that: The manufacturing method of the atomizing core of the electronic cigarette is as follows: S1: cut a section of fiber to become an oil-conducting fiber (2); S2: wrap a heating wire (1) around the middle position of the oil-conducting fiber; S3: wrap the fiber with the heating bimetallic spiral (3) and insert the metal pin (4) through the hole into the oil-conducting fiber (2) to fix the heating bimetallic spiral (3).

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