A high-efficiency filter cigarette holder and its filtration method

Abstract

This invention provides a high-efficiency cigarette filter and its filtration method, comprising a cigarette filter clamp, a filtered e-liquid storage chamber, and a mouthpiece connected in sequence. Based on fluid dynamics and interface science, this invention can replace traditional filter materials such as adsorbent sponges, microparticles, or filter microspheres. When smoking, cigarette smoke enters the filtered e-liquid storage chamber through the cigarette filter clamp. As it flows through the microfluidic filtered e-liquid chip, the cigarette smoke enters the micro-cavity through designed micro-holes and flows through micro-channels and curved edges. Harmful substances such as nicotine and tar in the cigarette smoke liquefy and separate from the smoke, thus achieving filtration. The filtered e-liquid is stored in the storage chamber and can be reused after multiple uses, once a certain amount has been accumulated, by disassembly, cleaning, and reassembly. Compared with traditional methods, this method achieves high-efficiency filtration of cigarette smoke, allows for multiple reuses, is simple to prepare, and has low cost, making it highly suitable for practical production and daily life.

Description

Technical Field

[0001] This invention relates to the field of essential technologies for human life, specifically to a high-efficiency filter cigarette holder and its filtration method. Background Technology

[0002] A cigarette filter is a device that filters the smoke produced by burning cigarettes before it enters the mouth. Its main purpose is to filter out harmful substances such as nicotine and tar contained in cigarette smoke.

[0003] Existing cigarette filters are mainly designed to target the various harmful substances in cigarette smoke. Based on physicochemical principles, they use filter materials such as adsorption sponges, nanoparticles, and filter beads to physically adsorb nicotine, tar, and other chemicals. However, this method generally suffers from drawbacks such as low adsorption efficiency and rapid degradation of filtration performance. As a result, cigarette filters designed and produced based on this method need to be replaced and discarded after only 1 to 5 cigarettes, causing serious waste of resources and environmental pollution.

[0004] Conventional cigarette filters use materials such as absorbent sponges, microparticles, or filter microspheres to filter smoke, which suffers from low filtration efficiency, rapid performance degradation, low reusability, resource waste, and environmental damage. Other technologies, such as those that achieve smoke filtration through electrical control, have drawbacks such as complex operation, high cost, or high energy consumption.

[0005] Therefore, a reusable, high-efficiency filter mouthpiece is needed. Summary of the Invention

[0006] This invention addresses the problems of low filtration efficiency and non-reusability in traditional cigarette filter holders by providing a high-efficiency filter holder and its filtration method. From the perspectives of fluid mechanics and interface science, it utilizes a system design combining microcavities, microfluidic channels, and curved structures to achieve higher filtration efficiency for cigarette smoke. Furthermore, it is reusable multiple times; after a certain number of uses, it only requires disassembly, cleaning, and reassembly for reuse. Using this high-efficiency filter holder eliminates the inconvenience of frequently purchasing, carrying, and replacing filter holders, and also reduces resource waste and environmental pollution.

[0007] This invention provides a high-efficiency filter cigarette holder, comprising a cigarette holder clamp, a filter e-liquid storage chamber, and a mouthpiece connected in sequence. The cigarette holder clamp fixes the cigarette and transmits smoke, the filter e-liquid storage chamber filters the smoke and stores the filtered e-liquid, and the mouthpiece transmits the filtered smoke.

[0008] The e-liquid storage chamber includes an e-liquid storage chamber wall, a first filter sponge detachably disposed inside the e-liquid storage chamber wall on the side connected to the mouthpiece clamp, and a lower semi-microfluidic chip, an upper semi-microfluidic chip, and a second filter sponge disposed sequentially from bottom to top inside the e-liquid storage chamber wall on the side connected to the mouthpiece. The cavity between the first filter sponge and the lower semi-microfluidic chip is the e-liquid storage chamber body for storing e-liquid.

[0009] In the high-efficiency filter mouthpiece of the present invention, as a preferred embodiment, both the first filter sponge and the second filter sponge are superhydrophobic sponges.

[0010] The preparation methods for the first and second filter sponges include the following steps:

[0011] S1. Mix the prepolymer, curing agent and pore-forming aid in proportion, heat to cure, wash out the pore-forming aid in ethanol solution, and dry in a drying oven to obtain an oleophilic and hydrophobic porous material.

[0012] S2. The oleophilic and hydrophobic porous material was repeatedly soaked in a superhydrophobic titanium dioxide nano-coating and then dried in a drying oven. This process was repeated 3 times to obtain the superhydrophobic sponge.

[0013] S3. Cut the superhydrophobic sponge to obtain the first filter sponge and the second filter sponge.

[0014] In a preferred embodiment of the high-efficiency filter cigarette holder of the present invention, in step S1, the prepolymer material is PDMS, the curing agent is PDMS curing agent, and the pore-forming aid is citric acid particles with a particle size of 100-500 nanometers. The PDMS prepolymer, PDMS curing agent and citric acid particles are mixed and stirred at a mass ratio of 5:1:30, heated at 80°C for 2 hours, and then soaked in an ethanol solution for 3 hours to wash out the citric acid particles.

[0015] In step S2, the soaking time for each immersion of the oleophilic and hydrophobic porous material is 5 minutes, and the drying time in the drying oven is 1 hour; the thickness of the second filter sponge is less than that of the first filter sponge, and the surface contact angle of both the second filter sponge and the first filter sponge is greater than 150° and is hydrophobic and oleophobic.

[0016] The high-efficiency filter mouthpiece of the present invention, as a preferred embodiment, includes a lower semi-microfluidic chip comprising a lower chip housing, a lower chip snap-fit ​​interface disposed near the outer edge of the lower chip housing, and a chip smoke inlet disposed in the middle of the lower chip housing;

[0017] The lower chip housing is circular. The number of lower chip snap-fit ​​interfaces and chip smoke inlets are both at least two and are symmetrically arranged along the center of the circle. The number of lower chip snap-fit ​​interfaces is the same as the number of upper chip snap-fit ​​connectors. The lower chip snap-fit ​​interfaces are square through holes, and the chip smoke inlets are fan-shaped through holes.

[0018] The present invention provides a high-efficiency filter mouthpiece, wherein, in a preferred embodiment, the upper semi-microfluidic chip includes an upper chip housing, an upper chip snap connector that protrudes outward from the outer edge of the upper chip housing, a chip smoke outlet disposed on the outer edge of the upper chip housing, and a smoke flow microchannel disposed on the lower surface of the upper semi-microfluidic chip, connected to the chip smoke outlet, and extending upward to the center of the upper chip housing.

[0019] The upper chip housing has a circular structure. The upper chip snap-fit ​​connector, chip smoke outlet, and smoke flow microchannel each have at least two and are arranged symmetrically along the center of the circle. The upper chip snap-fit ​​connector and chip smoke outlet are spaced apart. The upper chip snap-fit ​​connector has a square structure. The chip smoke outlet is a notch extending inward along the edge of the upper chip housing. The smoke flow microchannel is connected to the chip smoke outlet and is located inside the chip smoke outlet. The smoke flow microchannel is a long and thin groove.

[0020] After the lower chip clip interface is bent downwards and inserted into the upper chip clip connector for fixation, a microfluidic cavity is formed between the lower and upper semi-microfluidic chips.

[0021] The present invention provides a high-efficiency filter cigarette holder, in a preferred embodiment, wherein the cigarette holder clamp includes a cigarette holder tube and a cigarette holder interface that is detachably disposed in the cigarette holder tube by means of threads, and the cigarette holder interface is a hollow structure that fixes at least two types of cigarettes by means of a stepped platform;

[0022] The wall of the e-liquid storage chamber is a hollow cylindrical cavity. A first limiting ring is set inside the front end of the e-liquid storage chamber wall. The first limiting ring is a hollow structure that is connected to the inner wall of the e-liquid storage chamber wall and has an inner diameter smaller than the outer diameter of the first filter sponge. A thread is set on the inner wall of the front end of the e-liquid storage chamber wall. The rear end of the mouthpiece tube is connected to the front end of the e-liquid storage chamber wall by the thread. After the thread is tightened, the end of the mouthpiece tube squeezes and fixes the first filter sponge in front of the first limiting ring.

[0023] The mouthpiece is a cavity with a flat end and a round front end. A second limiting ring is set inside the front end of the mouthpiece. The second limiting ring is a hollow structure that connects to the inner wall of the mouthpiece and has an inner diameter smaller than the outer diameter of the second filter sponge. Threads are set on the inner wall of the front end of the mouthpiece and threads are set on the outer wall of the rear end of the filter e-liquid storage cavity wall. The filter e-liquid storage cavity wall and the mouthpiece are connected by threads. After the threads are tightened, the rear end of the filter e-liquid storage cavity wall will sequentially squeeze and fix the lower semi-microfluidic chip, the semi-microfluidic chip and the second filter sponge in front of the second limiting ring.

[0024] In a preferred embodiment of the high-efficiency filter mouthpiece described in this invention, the mouthpiece clamp, the wall of the filter e-liquid storage cavity, and the mouthpiece have the same maximum dimensions and are all made of food-grade plastic.

[0025] The materials for both the lower and upper semi-microfluidic chips are any one of the following: plastic, wood sheet, metal sheet, and rigid paper.

[0026] This invention provides a filtration method for a high-efficiency cigarette filter, comprising the following steps:

[0027] SⅠ. The smoke produced by burning cigarettes enters the e-liquid storage chamber through the first filter sponge;

[0028] SⅡ, the smoke passes through the filtered e-liquid storage chamber and reaches the lower semi-microfluidic chip. The cavity chip smoke inlet in the lower semi-microfluidic chip blocks and squeezes the smoke, causing the harmful substances in the smoke to separate into phases and then liquefy and precipitate to obtain e-liquid and filtered smoke.

[0029] SⅢ. The filtered smoke flows out through the chip smoke outlet of the upper semi-microfluidic chip and then passes through the second filter sponge into the mouthpiece cavity. The e-liquid is stored in the filtered e-liquid storage cavity under the guidance of the smoke flow microchannel.

[0030] The filtration method for a high-efficiency cigarette filter according to the present invention, as a preferred embodiment, includes nicotine and tar as harmful substances in step S2.

[0031] A microfluidic cavity is formed between the lower and upper semi-microfluidic chips. The filtered smoke enters the microfluidic cavity and is forced to become gentle, further precipitating and separating the liquefied harmful substances in the smoke. Then, when the smoke flows out of the microfluidic cavity through the chip smoke outlet, the curvature structure at the edge of the chip smoke outlet changes the fluid state of the filtered smoke, continuing to precipitate and separate harmful substances to obtain e-liquid. The e-liquid flows out of the microfluidic cavity under the guidance of the smoke flow microchannel and is stored in the filtered e-liquid storage cavity.

[0032] In a preferred embodiment of the high-efficiency filter mouthpiece of the present invention, in step S3, the first filter sponge and the second filter sponge seal the e-liquid in the e-liquid storage cavity, thus completing the filtration.

[0033] This invention designs a high-efficiency cigarette holder based on the principles of fluid dynamics and interface science. It can effectively filter harmful substances such as nicotine and tar from cigarette smoke, significantly reducing the harm of smoking to the human body. The main problem addressed by this novel high-efficiency cigarette holder is designing a new type of cigarette holder that can replace traditional cigarette holders with adsorbent materials such as adsorbent sponges, nanoparticles, and filter microbeads, while also possessing excellent filtration effect and reusability. This invention relates to a novel cigarette holder with a microfluidic filter chip. The core component is the e-liquid filter microfluidic chip, which consists of upper and lower semi-fluidic chips and a microscale cavity between them. The surfaces of the upper and lower semi-fluidic chips also feature micropores and microchannels. When the smoke from burning cigarettes flows through this e-liquid filter microfluidic chip, the micropores, microchannels, and curvature structure cause changes in flow velocity and phase transitions, thereby promoting the liquefaction or adsorption of harmful substances in the cigarette smoke, achieving a highly efficient filtration effect. On the other hand, the microfluidic chip of the present invention is made of polyetheretherketone, which has good processability, high chemical stability and high temperature resistance. It also has the advantages of being detachable and washable, which solves the shortcomings of traditional adsorption materials such as difficulty in cleaning and low reusability.

[0034] The present invention has the following advantages:

[0035] This invention, based on fluid dynamics and interface science, designs a highly efficient cigarette filter and a novel microfluidic chip that can replace traditional filter materials such as adsorbent sponges, microparticles, or filter microspheres. When smoking, cigarette smoke enters the filter oil storage chamber through the cigarette filter clip. As it flows through the microfluidic filter oil chip, the smoke passes through designed micropores into the microcavity and flows through microchannels and curved edges. During this process, harmful substances such as nicotine and tar in the cigarette smoke undergo liquefaction and separation from the smoke, thus achieving filtration. The filtered oil is stored in the oil storage chamber and can be reused after multiple uses, once a certain amount has been accumulated, by disassembly, cleaning, and reassembly. Compared to traditional methods, this method achieves highly efficient filtration of cigarette smoke, allows for repeated recycling, is simple to prepare, and has low cost, making it highly suitable for practical production and daily life. Attached Figure Description

[0036] Figure 1 A perspective view of a high-efficiency filter cigarette holder;

[0037] Figure 2 A front view of a high-efficiency filter cigarette holder;

[0038] Figure 3 Left view of a high-efficiency filter mouthpiece;

[0039] Figure 4A top view of a high-efficiency filter cigarette holder;

[0040] Figure 5 A top view of a high-efficiency filter cigarette holder;

[0041] Figure 6 A flowchart illustrating the preparation method of a first and second filter sponge for a high-efficiency cigarette filter.

[0042] Figure 7 A top view of the lower layer semi-microfluidic chip of a high-efficiency filter cigarette holder;

[0043] Figure 8 A bottom view of the upper semi-microfluidic chip of a high-efficiency filter cigarette holder;

[0044] Figure 9 This is a flowchart of a highly efficient cigarette filter method.

[0045] Figure label:

[0046] 1. Mouthpiece clamp; 11. Mouthpiece tube; 12. Mouthpiece interface; 2. Filtered e-liquid storage chamber; 21. Filtered e-liquid storage chamber wall; 22. First filter sponge; 23. Lower semi-microfluidic chip; 231. Lower chip housing; 232. Lower chip snap-fit ​​interface; 233. Smoke inlet; 24. Upper semi-microfluidic chip; 241. Upper chip housing; 242. Upper chip snap-fit ​​connector; 243. Smoke outlet; 244. Smoke flow microchannel; 25. Second filter sponge; 3. Mouthpiece. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Example 1

[0049] like Figures 1-5 As shown, a high-efficiency filter mouthpiece includes a mouthpiece clamp 1, a filter e-liquid storage chamber 2, and a mouthpiece 3 connected in sequence. The mouthpiece clamp 1 fixes the cigarette and transmits the smoke, the filter e-liquid storage chamber 2 filters the smoke and stores the filtered e-liquid, and the mouthpiece 3 transmits the filtered smoke.

[0050] like Figures 1-3As shown, the e-liquid storage chamber 2 includes an e-liquid storage chamber wall 21, a first filter sponge 22 detachably disposed inside the e-liquid storage chamber wall 21 on the side connected to the mouthpiece clamp 1, and a lower semi-microfluidic chip 23, an upper semi-microfluidic chip 24, and a second filter sponge 25 disposed sequentially from bottom to top inside the e-liquid storage chamber wall 21 on the side connected to the mouthpiece 3. The cavity between the first filter sponge 22 and the lower semi-microfluidic chip 23 is the e-liquid storage chamber for storing e-liquid.

[0051] Both the first filter sponge 22 and the second filter sponge 25 are superhydrophobic sponges;

[0052] like Figure 6 As shown, the preparation method of the first filter sponge 22 and the second filter sponge 25 includes the following steps:

[0053] S1. Mix the prepolymer, curing agent and pore-forming aid in proportion, heat to cure, and then soak and wash out the pore-forming aid in ethanol solution. After drying in a drying oven, an oleophilic and hydrophobic porous material is obtained.

[0054] The prepolymer is made of PDMS, the curing agent is PDMS curing agent, and the additive is citric acid particles with a particle size of 100-500 nanometers. The PDMS prepolymer, PDMS curing agent and citric acid particles are mixed and stirred at a mass ratio of 5:1:30. After heating at 80°C for 2 hours, the mixture is immersed in an ethanol solution for 3 hours to remove the citric acid particles. After drying in a drying oven, an oleophilic and hydrophobic porous material is obtained.

[0055] S2. Repeatedly soak the oleophilic and hydrophobic porous material in the superhydrophobic titanium dioxide nano-coating, then blow dry, repeat 3 times, and then dry in a drying oven to obtain the superhydrophobic sponge.

[0056] The soaking time for each immersion of the oleophilic and hydrophobic porous material is 5 minutes, and the drying time in the drying oven is 1 hour; the thickness of the second filter sponge 25 is less than the thickness of the first filter sponge 22, and the surface contact angle of both the second filter sponge 25 and the first filter sponge 22 is greater than 150° and is hydrophobic and oleophobic.

[0057] S3. Cut the superhydrophobic sponge to obtain the first filter sponge 22 and the second filter sponge 25;

[0058] like Figure 7 As shown, the lower semi-microfluidic chip 23 includes a lower chip housing 231, a lower chip snap-fit ​​interface 232 disposed on the side of the lower chip housing 231 near the outer edge, and a chip smoke inlet 233 disposed in the middle of the lower chip housing 231.

[0059] The lower chip housing 231 is circular. The number of lower chip snap-in interfaces 232 and chip smoke inlets 233 are both at least two and are symmetrically arranged along the center of the circle. The number of lower chip snap-in interfaces 232 is the same as the number of upper chip snap-in connectors 242. The lower chip snap-in interfaces 232 are square through holes, and the chip smoke inlets 233 are fan-shaped through holes.

[0060] like Figure 8 As shown, the upper semi-microfluidic chip 24 includes an upper chip housing 241, an upper chip snap connector 242 that protrudes outward from the outer edge of the upper chip housing 241, a chip smoke outlet 243 disposed on the outer edge of the upper chip housing 241, and a smoke flow microchannel 244 disposed on the lower surface of the upper semi-microfluidic chip 244 that is connected to the chip smoke outlet 243 and extends to the center of the upper chip housing 241.

[0061] The upper chip housing 241 has a circular structure. The upper chip snap-fit ​​connector 242, the chip smoke outlet 243, and the smoke flow microchannel 244 are all at least two in number and are symmetrically arranged along the center of the circle. The upper chip snap-fit ​​connector 242 and the chip smoke outlet 243 are spaced apart. The upper chip snap-fit ​​connector 242 has a square structure. The chip smoke outlet 243 is a notch extending inward along the edge of the upper chip housing 241. The smoke flow microchannel 244 is connected to the chip smoke outlet 243 and is located inside the chip smoke outlet 243. The smoke flow microchannel 244 is a long and thin groove.

[0062] After the lower chip snap-in interface 232 is bent downward and inserted into the upper chip snap-in connector 242 for fixation, a microfluidic cavity is formed between the lower semi-microfluidic chip 23 and the upper semi-microfluidic chip 24.

[0063] The mouthpiece clamp 1 includes a mouthpiece tube 11 and a mouthpiece interface 12 that is detachably disposed in the mouthpiece tube 11 by means of threads. The mouthpiece interface 12 is a hollow structure that fixes at least two kinds of cigarettes by means of a stepped platform.

[0064] The filter oil storage cavity wall 21 is a hollow cylindrical cavity. A first limiting ring is provided inside the front end of the filter oil storage cavity wall 21. The first limiting ring is a hollow structure that is connected to the inner wall of the filter oil storage cavity wall 21 and has an inner diameter smaller than the outer diameter of the first filter sponge 22. A thread is provided on the inner wall of the front end of the filter oil storage cavity wall 21. The rear end of the mouthpiece tube 11 is connected to the front end of the filter oil storage cavity wall 21 by the thread. After the thread is tightened, the end of the mouthpiece tube 11 squeezes and fixes the first filter sponge 22 in front of the first limiting ring.

[0065] The mouthpiece 3 is a cavity with a flat end and a round front end. A second limiting ring is set inside the front end of the mouthpiece 3. The second limiting ring is a hollow structure that is connected to the inner wall of the mouthpiece 3 and has an inner diameter smaller than the outer diameter of the second filter sponge 25. Threads are set on the inner wall of the front end of the mouthpiece 3 and threads are set on the outer wall of the rear end of the filter e-liquid storage cavity wall 21. The filter e-liquid storage cavity wall 21 is connected to the mouthpiece 3 by threads. After the threads are tightened, the rear end of the filter e-liquid storage cavity wall 21 will squeeze and fix the lower semi-microfluidic chip 23, the semi-microfluidic chip 24 and the second filter sponge 25 in sequence to the front side of the second limiting ring.

[0066] The maximum dimensions of the mouthpiece clip 1, the e-liquid filter storage chamber wall 21, and the mouthpiece 3 are the same and all are made of food-grade plastic.

[0067] The materials of the lower semi-microfluidic chip 23 and the upper semi-microfluidic chip 24 are any one of the following: plastic, wood sheet, metal sheet and rigid paper.

[0068] Example 2

[0069] like Figure 9 As shown, a filtration method for a high-efficiency cigarette filter includes the following steps:

[0070] SⅠ, The smoke produced by the burning of cigarettes enters the filter e-liquid storage cavity through the first filter sponge 22;

[0071] SⅡ, the smoke passes through the filtered e-liquid storage cavity and reaches the lower semi-microfluidic chip 23. The cavity chip smoke inlet 233 in the lower semi-microfluidic chip 23 blocks and squeezes the smoke, causing the harmful substances in the smoke to separate into phases and then liquefy and precipitate to obtain e-liquid and filtered smoke.

[0072] Harmful substances include nicotine and tar;

[0073] A microfluidic cavity is formed between the lower semi-microfluidic chip 23 and the upper semi-microfluidic chip 24. The filtered smoke enters the microfluidic cavity and is forced to become gentle, further precipitating and separating the liquefied harmful substances in the smoke. Then, when the smoke flows out of the microfluidic cavity through the chip smoke outlet 243, the curvature structure of the edge of the chip smoke outlet 243 changes the fluid state of the filtered smoke, continuing to precipitate and separate harmful substances to obtain e-liquid. The e-liquid flows out of the microfluidic cavity under the guidance of the smoke flow microchannel 244 and is stored in the filtered e-liquid storage cavity.

[0074] SⅢ. The filtered smoke flows out through the chip smoke outlet 243 of the upper semi-microfluidic chip 24 and then passes through the second filter sponge 25 into the cavity of the mouthpiece 3. The e-liquid is stored in the e-liquid storage cavity under the guidance of the smoke flow microchannel 244. The first filter sponge 22 and the second filter sponge 25 seal the e-liquid in the e-liquid storage cavity, and the filtration is completed.

[0075] Example 3

[0076] A high-efficiency filter cigarette holder and its filtration method.

[0077] Figures 1-5 Figures 7-8 are schematic diagrams of the novel filter mouthpiece. In this invention example, the filter mouthpiece is 5 cm long and has a maximum diameter of 1.5 cm. When the mouthpiece is in operation, structure 3 (food-grade high-quality mouthpiece) contacts the mouth, and structure 1 (multi-size inlet) can hold cigarettes of three sizes: coarse (10 mm), medium (8 mm), and fine (5 mm). When smoking, the smoke produced by the burning cigarette enters the filter oil storage chamber through structure 5 (thick-layer ultra-dual-hydrophobic PDMS nano-sponge). The upper end of the filter oil storage chamber is composed of structure 25 (thin-layer ultra-dual-hydrophobic PDMS nano-sponge) and structures 23 and 24 (microfluidic filter chips), with the microfluidic filter chip being the core component of this invention. The microfluidic filter chip used in this patent embodiment is made of PEKK (polyether ketone ketone), a special plastic widely used in aerospace, automotive, and medical industries, possessing advantages such as high mechanical strength, high temperature resistance, fatigue resistance, low flammability, and high selectivity for surface chemical modification. The working principle of this patent's microfluidic chip is that cigarette smoke passes through... Figure 7The cigarette smoke enters the microfluidic cavity through micropores 233. At this point, the rapidly flowing gas is blocked and compressed at the micropores, drastically disturbing the flow of the cigarette smoke. This causes phase separation of substances such as nicotine and tar in the cigarette smoke, leading to liquefaction. Once inside the nearly enclosed microcavity, the flow of the cigarette smoke is forced to slow down, facilitating the precipitation and separation of liquefied nicotine and tar. Meanwhile, the microchannels 244 designed on the surface of the microfluidic filter chip help to remove the precipitated liquefied nicotine, tar, and other harmful substances from the cavity, thus promoting further precipitation of these substances from the cigarette smoke. The filtered cigarette smoke flows out of the cavity through structure 243. The curvature of the structure's edges drastically alters the fluid state of the cigarette smoke, further promoting the precipitation and separation of harmful substances. The filtered harmful substances form cigarette e-liquid, which flows out of the microfluidic microcavity and is stored in the storage cavity. The filtered smoke then enters the mouth, respiratory tract, and lungs through a thin-layered superhydrophobic PDMS nanosponge (structure 25) and a food-grade high-quality mouthpiece (structure 3). Compared to unfiltered smoke, this method significantly reduces the inhalation of harmful substances. The thin-layer superhydrophobic PDMS nanosponges (structure 25) and thick-layer superhydrophobic PDMS nanosponges (structure 22) constitute the e-liquid storage chamber. Due to their superhydrophobic properties, they effectively prevent leakage of filtered e-liquid. The preparation method of the superhydrophobic PDMS sponge used in this embodiment is as follows: Figure 6 First, PDMS prepolymer, PDMS curing agent, and citric acid particles (100-500 nm in diameter) are thoroughly mixed at a mass ratio of 5:1:30. The mixture is then heated at 80°C for 2 hours, followed by immersion in ethanol for 3 hours to obtain an oleophilic and hydrophobic porous PDMS material. Next, a superhydrophobic treatment is performed by repeatedly immersing and drying the material three times with a superhydrophobic titanium dioxide (TiO2) nano-coating, each immersion lasting 5 minutes, followed by drying in a drying oven for 1 hour. This yields a superhydrophobic PDMS porous material. Finally, a suitable-sized superhydrophobic PDMS nano-sponge thick / thin diaphragm is obtained by cutting the material using a mold and cutting tool. All structural components of the high-efficiency filter cigarette holder of this invention can be easily disassembled and cleaned, facilitating the recyclability and widespread application of this novel cigarette holder.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency filter cigarette holder, characterized in that: It includes a mouthpiece clamp (1), a filter oil storage chamber (2), and a mouthpiece (3) connected in sequence. The mouthpiece clamp (1) fixes the cigarette and transmits smoke. The filter oil storage chamber (2) filters the smoke and stores the filtered oil. The mouthpiece (3) transmits the filtered smoke. The filter e-liquid storage cavity (2) includes a filter e-liquid storage cavity wall (21), a first filter sponge (22) detachably disposed in the filter e-liquid storage cavity wall (21) on the side connected to the mouthpiece clamp (1), and a lower semi-microfluidic chip (23), an upper semi-microfluidic chip (24), and a second filter sponge (25) disposed sequentially from bottom to top in the filter e-liquid storage cavity wall (21) on the side connected to the mouthpiece (3). The cavity between the first filter sponge (22) and the lower semi-microfluidic chip (23) is a filter e-liquid storage cavity for storing e-liquid. The lower semi-microfluidic chip (23) includes a lower chip housing (231), a lower chip snap-fit ​​interface (232) disposed on the side of the lower chip housing (231) near the outer edge, and a chip smoke inlet (233) disposed in the middle of the lower chip housing (231). The lower chip housing (231) is circular. The number of the lower chip latch interface (232) and the chip smoke inlet (233) are both at least two and are symmetrically arranged along the center of the circle. The lower chip latch interface (232) is a square through hole and the chip smoke inlet (233) is a fan-shaped through hole. The upper semi-microfluidic chip (24) includes an upper chip housing (241), an upper chip snap connector (242) that protrudes outward from the outer edge of the upper chip housing (241), a chip smoke outlet (243) disposed on the outer edge of the upper chip housing (241), and a smoke flow microchannel (244) disposed on the lower surface of the upper semi-microfluidic chip (24), connected to the chip smoke outlet (243), and extending towards the center of the upper chip housing (241). The upper chip housing (241) has a circular structure. The upper chip snap-fit ​​connector (242), the chip smoke outlet (243), and the smoke flow microchannel (244) are all at least two in number and are symmetrically arranged along the center of the circle. The upper chip snap-fit ​​connector (242) and the chip smoke outlet (243) are spaced apart. The upper chip snap-fit ​​connector (242) has a square structure. The chip smoke outlet (243) is a notch extending inward along the edge of the upper chip housing (241). The smoke flow microchannel (244) is connected to the chip smoke outlet (243) and is located inside the chip smoke outlet (243). The smoke flow microchannel (244) is a long and narrow groove. The number of the lower chip snap-fit ​​interfaces (232) is the same as the number of the upper chip snap-fit ​​connectors (242).

2. The high-efficiency filter cigarette holder according to claim 1, characterized in that: Both the first filter sponge (22) and the second filter sponge (25) are superhydrophobic sponges; The preparation methods of the first filter sponge (22) and the second filter sponge (25) include the following steps: S1. Mix the prepolymer, curing agent and additives in proportion and stir. After heating, put the mixture into an ethanol solution to obtain an oleophilic and hydrophobic porous material. S2. The oleophilic and hydrophobic porous material is repeatedly soaked in the superhydrophobic titanium dioxide nano-coating, then blown dry. This process is repeated 3 times and then dried in a drying oven to obtain the superhydrophobic sponge. S3. Cut the superhydrophobic sponge to obtain the first filter sponge (22) and the second filter sponge (25).

3. The high-efficiency filter cigarette holder according to claim 2, characterized in that: In step S1, the material of the prepolymer is PDMS, the curing agent is PDMS curing agent, and the auxiliary agent is citric acid particles with a particle size of 100 nanometers. The PDMS prepolymer, PDMS curing agent and citric acid particles are mixed and stirred in a mass ratio of 5:1:30, heated at 80°C for 2 hours and then soaked in an ethanol solution for 3 hours. In step S2, the soaking time of the oleophilic and hydrophobic porous material is 5 minutes each time, and the drying time in the drying oven is 1 hour; the thickness of the second filter sponge (25) is less than the thickness of the first filter sponge (22), and the surface contact angle of the second filter sponge (25) and the first filter sponge (22) are both greater than 150° and are hydrophobic and oleophobic.

4. The high-efficiency filter cigarette holder according to claim 1, characterized in that: The mouthpiece clamp (1) includes a mouthpiece tube (11) and a mouthpiece interface (12) that is detachably disposed in the mouthpiece tube (11) by means of threads. The mouthpiece interface (12) is a hollow structure that fixes at least two kinds of cigarettes by means of a stepped platform. The filter e-liquid storage cavity wall (21) is a hollow cylindrical cavity. A first limiting ring is provided inside the front end of the filter e-liquid storage cavity wall (21). The first limiting ring is a hollow structure that is connected to the inner wall of the filter e-liquid storage cavity wall (21) and has an inner diameter smaller than the outer diameter of the first filter sponge (22). A thread is provided on the inner wall of the front end of the filter e-liquid storage cavity wall (21). The rear end of the mouthpiece tube (11) is connected to the front end of the filter e-liquid storage cavity wall (21) by a thread. After the thread is tightened, the end of the mouthpiece tube (11) squeezes and fixes the first filter sponge (22) to the front side of the first limiting ring. The mouthpiece (3) is a cavity with a flat end and a round front end. A second limiting ring is provided inside the front end of the mouthpiece (3). The second limiting ring is a hollow structure that is connected to the inner wall of the mouthpiece (3) and has an inner diameter smaller than the outer diameter of the second filter sponge (25). A thread is provided on the inner wall of the front end of the mouthpiece (3). A thread is provided on the outer wall of the rear end of the filter e-liquid storage cavity wall (21). The filter e-liquid storage cavity wall (21) is connected to the mouthpiece (3) by a thread. After the thread is tightened, the rear end of the filter e-liquid storage cavity wall (21) will squeeze and fix the lower semi-microfluidic chip (23), the upper semi-microfluidic chip (24) and the second filter sponge (25) in sequence to the front side of the second limiting ring.

5. The high-efficiency filter cigarette holder according to claim 1, characterized in that: The maximum dimensions of the mouthpiece clamp (1), the filter e-liquid storage chamber wall (21), and the mouthpiece (3) are the same and all are made of food-grade plastic; The materials of the lower semi-microfluidic chip (23) and the upper semi-microfluidic chip (24) are any one of the following: plastic, wood sheet, metal sheet and hard paper.

6. A filtration method for a high-efficiency filter cigarette holder according to any one of claims 1 to 5, characterized in that: Includes the following steps: S1. The smoke produced by the burning of cigarettes enters the filter oil storage cavity through the first filter sponge (22); S2. The smoke passes through the filtered e-liquid storage cavity and reaches the lower semi-microfluidic chip (23). The cavity chip smoke inlet (233) in the lower semi-microfluidic chip (23) blocks and squeezes the smoke, causing the harmful substances in the smoke to separate into phases and then liquefy and precipitate to obtain e-liquid and filtered smoke. S3. The filtered smoke flows out through the chip smoke outlet (243) of the upper semi-microfluidic chip (24) and then passes through the second filter sponge (25) into the cavity of the mouthpiece (3). The e-liquid is stored in the filtered e-liquid storage cavity under the guidance of the smoke flow microchannel (244).

7. The filtration method for a high-efficiency cigarette filter according to claim 6, characterized in that: In step S2, the harmful substances include nicotine and tar; A microfluidic cavity is formed between the lower semi-microfluidic chip (23) and the upper semi-microfluidic chip (24). The filtered smoke enters the microfluidic cavity and is forced to become gentle, further precipitating and separating the liquefied harmful substances in the smoke. Then, when the smoke flows out of the microfluidic cavity through the chip smoke outlet (243), the curvature structure of the edge of the chip smoke outlet (243) changes the fluid state of the filtered smoke, continuing to precipitate and separate the harmful substances to obtain the e-liquid. The e-liquid flows out of the microfluidic cavity under the guidance of the smoke flow microchannel (244) and is stored in the filtered e-liquid storage cavity.

8. The filtration method for a high-efficiency cigarette filter according to claim 6, characterized in that: In step S3, the first filter sponge (22) and the second filter sponge (25) seal the e-liquid in the e-liquid storage cavity, and the filtration is completed.

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