Nanometer bubble preparation device based on resistance thermal effect

Abstract

The utility model relates to a nanobubble preparation device based on a resistance thermal effect. The nanobubble preparation device based on the resistance heat effect comprises a box body, the bottom of the box body is fixedly connected with two fixing plates which are arranged in parallel at intervals, the opposite side faces of the two fixing plates are each provided with a plurality of inserting grooves which are distributed at equal intervals in the length direction, and the inserting grooves in the two sides are distributed in a mirror symmetry mode to jointly form a positioning groove of a heat production resistor; the two ends of each heat generation resistor are embedded in the corresponding positioning grooves respectively, a composite heat conduction coating layer is arranged on the surface of each heat generation resistor, the composite heat conduction coating layers are formed by aluminum foil and tin foil in a composite lamination mode and tightly wrap the outer surfaces of the heat generation resistors, and micron-scale channels or nano-scale holes are formed in the surfaces of the composite heat conduction coating layers through laser etching. Therefore, bubble nucleation is promoted. The nanobubble preparation device based on the resistance thermal effect solves the problems of low nanobubble generation efficiency, non-uniform size, poor stability and the like in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of nanobubble preparation technology, specifically relating to a nanobubble preparation device based on the resistance heating effect. Background Technology

[0002] Spherical bubbles with a diameter of 0–1 micrometer are defined as bulk nanobubbles; on hydrophobic interfacial surfaces, bubbles with a size of 0.01–0.1 micrometers and a contact line diameter of 0.05–0.5 micrometers at the periphery of the three phases are called surface nanobubbles. Over the past 20 years, the generation methods and application technologies of nanobubbles have received increasing attention. Due to their unique physicochemical properties (such as high specific surface area, long lifespan, and strong oxidizing power), nanobubbles show broad application prospects in various fields such as environmental protection, agriculture, medicine, industry, and food. Current research results indicate that nanobubbles can exist stably in aqueous solutions and liquid phases.

[0003] The mechanism of nanobubble fusion is the result of the combined effects of multiple factors, including interfacial tension, van der Waals forces, gas diffusion, thin film thinning, and the influence of the external environment. To investigate the mechanism of nanobubble fusion, a device capable of fabricating nanobubbles is needed.

[0004] Methods for preparing nanobubbles mainly include depressurization gas release, heating, electrolysis, solvent exchange, and ultrasonic cavitation. Solvent exchange produces small and uniform nanobubbles, but suffers from complex processes, low efficiency, and difficulty in large-scale bubble generation for observing fusion phenomena. Depressurization gas release is simple and low-cost, but energy consumption is high and applicable gases are limited. The core principle of heating for nanobubble generation is to regulate the solubility and phase transition behavior of gas in a liquid through temperature changes, combined with nucleation kinetics and physical confinement mechanisms to generate and stabilize nanobubbles. Resistance heating raises the local temperature of the liquid, creating a supersaturated gas state, thus efficiently and controllably generating nanobubbles. Considering economic cost and process stability, resistance heating is simple in principle, generates bubbles quickly, and meets the requirements for large-scale nanobubble preparation; therefore, it is necessary to develop a nanobubble preparation device based on the resistance heating effect. Utility Model Content

[0005] To achieve the above objectives, this invention provides a nanobubble preparation device based on the resistance heating effect.

[0006] The technical solution of this utility model for a nanobubble preparation device based on the resistance heating effect is as follows:

[0007] A nanobubble preparation device based on the resistance heating effect, comprising:

[0008] The bottom of the enclosure has two parallel and spaced fixing plates. On the opposite sides of the two fixing plates, there are multiple insertion grooves that are equidistant along the length direction. The insertion grooves on both sides are mirror-symmetrically distributed and together form the positioning groove of the heat generating resistor.

[0009] Multiple heat-generating resistors are embedded at both ends in corresponding positioning slots. The surface of the heat-generating resistor is provided with a composite thermally conductive coating layer, which is formed by laminating aluminum foil and tin foil and tightly covering the outer surface of the heat-generating resistor. The surface of the composite thermally conductive coating layer is laser-etched with micron-level channels or nano-level pores to promote bubble nucleation.

[0010] Furthermore, the sidewalls of the two fixing plates are provided with a number of positioning structures for fixing the heat-generating resistor, and each positioning mechanism is positioned and engaged with the end of the heat-generating resistor extending from the positioning groove.

[0011] Furthermore, the positioning structure includes a connecting plate, a return spring, and a positioning post. The two ends of the heat-generating resistor are respectively provided with positioning holes that match the positioning post. The connecting plate is fixedly connected to the side wall of the fixing plate. The connecting plate is provided with a through hole for the positioning post to pass through. The outer wall of the positioning post is provided with a flange. The return spring is fitted on the positioning post and its two ends are respectively fixedly connected to the flange and the connecting plate.

[0012] Furthermore, one end of the positioning post is provided with a circular pull plate.

[0013] Furthermore, the nanobubble preparation device includes a power supply, and the housing has two through holes. The power supply is connected to the terminals of the heat-generating resistor through two wires. The two wires pass through the two through holes and enter the housing. A sealing ring is provided in the through hole to seal the wires. A control switch is provided on one of the wires.

[0014] Furthermore, the box body is made of transparent acrylic sheet, and the nanobubble preparation device includes an optical camera disposed on the outside of the box body for photographing the nanobubbles inside the box body.

[0015] This invention provides a nanobubble preparation device based on the resistive heating effect, which has the following advantages compared to the prior art:

[0016] This invention utilizes a heat-generating resistor to locally raise the temperature of a liquid, creating a supersaturated gas state and thus efficiently and controllably generating nanobubbles. By precisely controlling the heating parameters and solution environment, the size and quantity of the nanobubbles can be effectively regulated. A dual-fixed plate mirror-symmetric slot design ensures precise array positioning of the heat-generating resistors, guaranteeing complete immersion and uniform spacing across all resistor surfaces, preventing localized temperature field distortion due to installation misalignment. The aluminum-tin foil composite coating improves thermal diffusion efficiency by 40% compared to a single metal layer, and combined with precise thickness control of 0.05–0.1 mm, the temperature difference on the resistor surface is less than 2°C. The femtosecond laser-etched micro / nano composite structure increases the nucleation site density by three orders of magnitude, and with precise temperature control of 50–80°C, the bubble nucleation rate reaches 10-1. 5 pcs / (cm) 2 The nanobubble preparation device based on the resistive heating effect of this invention solves the problems of low nanobubble generation efficiency, uneven size, and poor stability in the prior art. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the nanobubble preparation device based on the resistance heating effect of this utility model;

[0018] Figure 2 This is a schematic diagram of the box structure in the nanobubble preparation device based on the resistance heating effect of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixed plate and the heat-generating resistor in the nanobubble preparation device based on the resistive heating effect of this utility model.

[0020] Figure 4 This is a schematic diagram of the positioning structure in the nanobubble preparation device based on the resistance heating effect of this utility model;

[0021] Figure 5 This is a schematic diagram of the heat-generating resistor in the nanobubble preparation device based on the resistive heating effect of this utility model;

[0022] In the diagram: 1. Housing; 2. Fixing plate; 3. Heating resistor; 4. Positioning hole; 5. Connecting plate; 6. Positioning post; 7. Flange; 8. Return spring; 9. Pull plate; 10. High-definition camera. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Specific embodiments of the nanobubble preparation device based on the resistance heating effect of this utility model are as follows: Figures 1 to 5 As shown, it includes a housing 1, multiple heat-generating resistors 3, a power supply, and a high-definition camera 10.

[0025] The chamber 1 is made of acrylic sheet, with an overall cubic structure of 30cm*30cm*30cm and a sheet thickness of 5-10mm, providing good light transmittance and corrosion resistance. The chamber 1 has a volume of 10-20 liters and a solution depth of 15-20cm to meet various experimental needs. Two parallel, spaced-apart fixing plates 2 are fixedly connected to the bottom of the chamber 1. Each fixing plate 2 has multiple equally spaced insertion grooves along its length on its opposite sides, with the grooves on both sides being mirror-symmetrically distributed. These grooves together form the positioning groove for the heating resistor 3, ensuring the heating resistor 3 is stably positioned and completely submerged in the liquid.

[0026] The heat-generating resistor 3 is a high-power-density, high-temperature-resistant plate-shaped thick-film resistor with a rated power range of 10–100W and a resistance value range of 1–10Ω. The surface of the heat-generating resistor 3 is covered with a composite thermally conductive coating layer, which is formed by laminating aluminum foil and tin foil and tightly wrapping the outer surface of the resistor body. The thickness is 0.05–0.1mm, ensuring uniform heat distribution and enhancing the shooting effect of the optical camera. The surface of the composite thermally conductive coating layer is laser-etched to create micron-level channels or nano-level pores to promote bubble nucleation.

[0027] The side walls of the two fixing plates 2 are provided with several positioning structures for fixing the heat-generating resistors 3. Each positioning mechanism is positioned and engaged with the end of the heat-generating resistor 3 that extends out of the positioning groove. The positioning structure includes a connecting plate 5, a return spring 8, and a positioning post 6. The two ends of the heat-generating resistor 3 are respectively provided with positioning holes 4 that match the positioning post 6. The connecting plate 5 is fixedly connected to the side wall of the fixing plate 2. The connecting plate 5 is provided with a through hole for the positioning post 6 to pass through. The outer wall of the positioning post 6 is provided with a flange 7. The return spring 8 is fitted on the positioning post 6 and its two ends are respectively fixedly connected to the flange 7 and the connecting plate 5. One end of the positioning post 6 is provided with a circular pull plate 9.

[0028] The housing 1 has two through holes. The power supply is connected to the terminals of the heating resistor 3 via two wires. The two wires pass through the two through holes into the housing 1, and sealing rings are installed inside the through holes to seal the wires. One of the wires has a control switch. An adjustable constant voltage power supply is used, with an output voltage range of 0–30V and a current range of 0–10A, ensuring a stable and controllable heating process. A high-resolution optical camera (resolution ≥1080p, frame rate ≥1000FPS) is used to capture real-time images of the nanobubble generation process. The camera is equipped with a microscope lens with a magnification of 10–100x to clearly observe the size and distribution of the nanobubbles.

[0029] In use, the nanobubble preparation device based on the resistive heating effect of this invention covers the surface of the heat-generating resistor 3 with high-temperature resistant thermally conductive aluminum foil or tin foil paper to ensure a smooth and flat surface free of bubbles or wrinkles. The aluminum foil or tin foil paper is fixed with high-temperature thermally conductive adhesive, and the edges are sealed with high-temperature resistant insulating tape to prevent peeling or oxidation.

[0030] Prepare the solution required for the experiment. The solution temperature should be between 20 and 80℃, and the specific temperature should be adjusted according to the experimental requirements. Pour the solution into chamber 1, ensuring that the liquid surface completely submerges the heat-generating resistor 3.

[0031] Connect a constant voltage power supply and slowly adjust the output voltage (gradually increasing from 0V to 15V) to control the heating power from 10 to 100W. Observe the resistive surface in real time using an optical camera to record the generation process of nanobubbles.

[0032] Heating time and power were adjusted to raise the local temperature of the solution to 50–80°C, creating a supersaturated gas state and generating uniform bubbles of 50–500 nm. The bubble generation process was captured on an optical camera, and the bubble size, number, and distribution were analyzed using image processing software.

[0033] This invention utilizes a heat-generating resistor 3 to locally raise the temperature of a liquid, creating a supersaturated gas state, thereby efficiently and controllably generating nanobubbles. By precisely controlling the heating parameters and solution environment, the size and quantity of the nanobubbles can be effectively regulated. The mirror-symmetric slot design of the dual fixing plates 2 ensures the precise array positioning of the heat-generating resistors 3, guaranteeing that all resistor surfaces are completely immersed and evenly spaced, avoiding local temperature field distortion caused by installation misalignment. The aluminum foil-tin foil composite coating layer improves thermal diffusion efficiency by 40% compared to a single metal layer, and combined with precise thickness control of 0.05–0.1 mm, the temperature difference on the resistor surface is less than 2°C. The femtosecond laser-etched micro / nano composite structure increases the nucleation site density by three orders of magnitude, and with precise temperature control of 50–80°C, the bubble nucleation rate reaches 10-1. 5 pcs / (cm) 2 The nanobubble preparation device based on the resistive heating effect of this invention solves the problems of low nanobubble generation efficiency, uneven size, and poor stability in the prior art.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nanobubble preparation device based on the resistance heating effect, characterized in that, include: The bottom of the enclosure has two parallel and spaced fixing plates. On the opposite sides of the two fixing plates, there are multiple insertion grooves that are equidistant along the length direction. The insertion grooves on both sides are mirror-symmetrically distributed and together form the positioning groove of the heat generating resistor. Multiple heat-generating resistors are embedded at both ends in corresponding positioning slots. The surface of the heat-generating resistor is provided with a composite thermally conductive coating layer, which is formed by laminating aluminum foil and tin foil and tightly covering the outer surface of the heat-generating resistor. The surface of the composite thermally conductive coating layer is laser-etched with micron-level channels or nano-level pores to promote bubble nucleation.

2. The nanobubble preparation device based on resistive heating effect according to claim 1, characterized in that, The sidewalls of the two fixing plates are provided with a number of positioning structures for fixing the heat-generating resistor, and each positioning structure is positioned and engaged with the end of the heat-generating resistor extending from the positioning groove.

3. The nanobubble preparation device based on resistive heating effect according to claim 2, characterized in that, The positioning structure includes a connecting plate, a return spring, and a positioning post. The two ends of the heat-generating resistor are respectively provided with positioning holes that match the positioning post. The connecting plate is fixedly connected to the side wall of the fixing plate. The connecting plate is provided with a through hole for the positioning post to pass through. The outer wall of the positioning post is provided with a flange. The return spring is fitted on the positioning post and its two ends are respectively fixedly connected to the flange and the connecting plate.

4. The nanobubble preparation device based on resistive heating effect according to claim 3, characterized in that, One end of the positioning post is equipped with a circular pull plate.

5. The nanobubble preparation device based on resistive heating effect according to claim 1, characterized in that, The nanobubble preparation device includes a power supply. The housing has two through holes. The power supply is connected to the terminals of a heat-generating resistor via two wires. The two wires pass through the two through holes and are respectively inserted into the housing. A sealing ring is provided in the through hole to seal the wires. A control switch is provided on one of the wires.

6. The nanobubble preparation device based on resistive heating effect according to claim 1, characterized in that, The box is made of transparent acrylic sheet, and the nanobubble preparation device includes an optical camera set on the outside of the box for photographing the nanobubbles inside the box.

Images