Ionic wind odor purification and sterilization device and refrigerator

Abstract

The invention provides an ionic wind odor purification and sterilization device and a refrigerator. The ionic wind odor purification and sterilization device comprises a shell, a power module, an ionization assembly and a catalysis module. The shell is used for fixing the power supply module, the ionization assembly and the catalysis module, and the shell internally comprises an air inlet part and an air outlet part; the power supply module is used for providing voltage for the ionization assembly; the ionization assembly comprises a generating electrode and a receiving electrode, the tip end of the generating electrode faces the receiving electrode and the air outlet part, the generating electrode is a long-strip-shaped electrode or a circular electrode, a plurality of sawteeth are arranged on the generating electrode, the angle of the sawteeth is 10-60 degrees, the catalytic module and the receiving electrode are wrapped by a circle, and honeycomb holes are formed in the catalytic module and serve as the air outlet part. The sawtooth tip is adopted as a generation electrode, air is ionized to generate ionic wind, and odor removal is achieved in combination with the catalysis module. Meanwhile, ozone and negative ions of the ionic wind can sterilize the refrigerator, an air circulation module is not needed, rapid odor removal is achieved, and the advantages of being low in cost, free of noise and rapid in odor removal are achieved.

Description

Technical Field

[0001] This application relates to the technical field of refrigerators, and particularly to an ion wind odor and bacteria removal device and a refrigerator. Background Art

[0002] As a core household appliance for storing food in daily life, the internal environment of a refrigerator is prone to the growth of microorganisms such as bacteria and molds due to the long-term storage of various food ingredients. At the same time, the self-metabolism or cross-tainting of food ingredients will produce a variety of volatile organic compounds (such as sulfides, amines, etc.), resulting in odor problems. These microorganisms and odors will not only accelerate the spoilage of food ingredients, affect the taste of food, but also may threaten the health of users through the food chain. Therefore, efficient odor and bacteria removal technology is one of the key core functions to improve the safety and user experience of refrigerator use, and is also the key focus of technological research and development continuously concerned by the industry.

[0003] Currently, the technical paths for refrigerator odor and bacteria removal in the industry mainly include cold catalyst catalytic technology, photocatalytic technology, plasma technology, and plasma-assisted catalyst catalytic technology. Among them, the plasma-assisted catalyst catalytic technology has become a research hotspot due to its dual action mechanism: this technology realizes the sterilization function through active particles such as negative ions and ozone generated by the plasma, and at the same time uses the catalyst material to adsorb odor molecules and degrade them through catalytic reactions, so as to achieve the synergistic effect of odor removal and sterilization. Compared with single cold catalyst catalytic or photocatalytic technology, it has significant advantages in sterilization efficiency and odor treatment ability, and has become an important direction to break through the bottleneck of traditional technology.

[0004] However, the existing plasma-assisted catalyst catalytic technology faces significant challenges in practical applications: on the one hand, the technical solutions without an air circulation module rely on natural diffusion to achieve air flow, resulting in low contact efficiency between the catalyst material and polluted air, slow odor removal speed, and it is difficult to meet the rapid purification requirements in high-frequency use scenarios; on the other hand, the technical solutions equipped with an air circulation module (such as a fan) can actively promote air circulation and improve the odor removal efficiency, but the additional mechanical components not only increase the device cost, but also introduce operating noise and affect the user experience; in traditional designs, the difficult-to-degrade odor molecules adsorbed by the catalyst material may become secondary pollution sources due to lack of effective treatment, and at the same time, if the ozone in the ion wind is not fully degraded, it may remain in the refrigerator and produce a pungent smell, further reducing the use experience. There is an urgent need for a new technical solution to solve this problem to achieve low-cost, noise-free and high-odor removal efficiency plasma-assisted catalyst catalytic sterilization. Summary of the Invention

[0005] This application provides an ion wind odor and bacteria removal device and a refrigerator to solve the problem of the cost of existing plasma-assisted catalyst catalytic sterilization.

[0006] In a first aspect, this application provides an ion wind odor and bacteria removal device, and the device includes:

[0007] A housing, a power supply module, an ionization component, and a catalytic module; the housing is used to fix the power supply module, the ionization component, and the catalytic module, and the housing includes an air inlet part and an air outlet part; the power supply module is used to provide an excitation voltage to the ionization component;

[0008] The ionization component includes a generating electrode and a receiving electrode. The generating electrode is installed between the air inlet part and the air outlet part, the tip of the generating electrode faces the receiving electrode and the air outlet part, the generating electrode is a strip-shaped electrode or a circular electrode, and multiple sawteeth are provided on the generating electrode, and the sawtooth angle is 10-60°; the catalytic module is used to adsorb and degrade odors, the catalytic module wraps around the receiving electrode in a circle, and honeycomb holes are provided on the catalytic module as the air outlet part.

[0009] In some possible implementation manners, the curvature radius of the sawtooth tip changes in a gradient along the length direction of the electrode, and the adjacent sawtooth angles are alternately set to 10-60°.

[0010] In some possible implementation manners, the generating electrode is a spiral three-dimensional structure, the spiral diameter is 2-5 mm, the pitch is 1-3 mm, the spiral axis coincides with the central axis of the receiving electrode, and micron-level grooves are opened on the electrode surface along the spiral direction, and rare earth permanent magnetic materials are filled in the grooves.

[0011] In some possible implementation manners, the sawtooth tip is coated with a carbon nanotube-tungsten diselenide composite coating, and the coating thickness is 50-200 nm.

[0012] In some possible implementation manners, the receiving electrode is a square electrode or a circular electrode, and the receiving electrode surrounds the catalytic module in a circle outside.

[0013] In some possible implementation manners, the shortest distance between the generating electrode and the edge of the receiving electrode is 7-15 mm, and the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal.

[0014] In some possible implementation manners, the catalytic module is loaded with an odor degradation catalyst and an ozone degradation catalyst.

[0015] In some possible implementation manners, the receiving electrode is an electrode with a small upper opening and a large lower opening. The opening of the receiving electrode closer to the sawtooth tip of the generating electrode is smaller, and the opening farther from the sawtooth tip of the generating electrode is larger.

[0016] In some possible implementation manners, a gas sensor array is provided in the device to monitor the concentrations of hydrogen sulfide and trimethylamine odor molecules and the ozone residue in the refrigerator in real time. The gas sensor array includes an odor sensor, an ozone concentration sensor, and a temperature and humidity sensor.

[0017] In a second aspect, the present application provides a refrigerator, which includes the ion wind odor and bacteria purification device described in the first aspect.

[0018] As can be seen from the above, the present application provides an ion wind odor and bacteria purification device and a refrigerator. The device includes: a housing, a power supply module, an ionization component, and a catalytic module; the housing is used to fix the power supply module, the ionization component, and the catalytic module, and the housing includes an air inlet part and an air outlet part; the power supply module is used to provide an excitation voltage for the ionization component; the ionization component includes a generating electrode and a receiving electrode, wherein the generating electrode is installed between the air inlet part and the air outlet part, the tip of the generating electrode faces the receiving electrode and the air outlet part, the generating electrode is a strip-shaped electrode or a circular electrode, and a plurality of sawteeth are provided on the generating electrode, and the sawtooth angle is 10-60°; the catalytic module is used to adsorb and degrade odors, the catalytic module wraps around the receiving electrode, and honeycomb holes are provided on the catalytic module as the air outlet part. In the present application, the sawtooth tip is used as the generating electrode to ionize air to generate ion wind, and the catalytic module is combined to achieve odor purification. At the same time, the ozone and negative ions in the ion wind can sterilize the refrigerator, and rapid odor purification can be achieved without an air circulation module, which has the advantages of low cost, no noise, and fast odor purification.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. Design of the ionization component: The generating electrode uses a sawtooth-shaped electrode, the sawtooth angle is 10-60°, and the sawtooth-shaped electrode uses a laser cutting process; the shortest distance between the generating electrode and the edge of the receiving electrode is 7-15 mm, and it is designed that the shortest distance from the tip of each sawtooth to the edge of the receiving electrode is equal.

[0021] 2. The ion wind cooperates with the catalytic module to quickly purify odors and sterilize: The ion wind drives air circulation, and at the same time, ozone and the catalytic module are used for cooperative catalytic oxidation to improve the odor degradation rate and avoid the poisoning and failure of the catalytic module. The ozone concentration in the ion wind is reasonably designed, and the remaining ozone and negative ions after passing through the catalytic module can kill microorganisms in the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the ion wind odor and bacteria purification device provided by the present application;

[0024] Figure 2 It is a cross-sectional view of the ion wind odor and bacteria purification device provided by the embodiment of the present application;

[0025] Figure 3 Schematic diagram of the square ionization component provided by the embodiment of the present application;

[0026] Figure 4 Schematic diagram of the circular ionization component provided by the embodiment of the present application;

[0027] Figure 5 Schematic diagram of the ionization component provided by the embodiment of the present application Figure 1 ;

[0028] Figure 6 Schematic diagram of the ionization component provided by the embodiment of the present application Figure 2 ;

[0029] Figure 7 Schematic diagram of the refrigerator provided by the embodiment of the present application.

[0030] Illustration: 1 - Catalytic module; 2 - Receiving electrode; 3 - Generating electrode; 4 - Housing; 5 - Power supply module; 6 - Air inlet part; 7 - Tip; 21 - First receiving electrode edge; 22 - Second receiving electrode edge; 23 - Third receiving electrode edge; 10 - Ion wind odor and bacteria removal device. Detailed implementation manners

[0031] The embodiments will be described in detail below, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following embodiments do not represent all implementation manners consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application described in detail in the claims.

[0032] As a core household appliance for storing food in daily life, the internal environment of the refrigerator is prone to breeding microorganisms such as bacteria and molds due to the long-term storage of various food ingredients. At the same time, the self-metabolism of food ingredients or the cross-taste of each other will produce various volatile organic compounds (such as sulfides, amines, etc.), resulting in odor problems. These microorganisms and odors will not only accelerate the deterioration of food ingredients, affect the taste of food, but also may threaten the health of users through the food chain. Therefore, efficient odor and bacteria removal technology is one of the key core functions to improve the use safety and user experience of the refrigerator, and it is also the key focus of technology research and development continuously concerned by the industry.

[0033] At present, the technical paths for odor and bacteria removal in refrigerators in the industry mainly include cold catalyst catalytic technology, photocatalytic technology, plasma technology, and plasma-catalyzed catalytic technology. Among them, the plasma-catalyzed catalytic technology has become a research hotspot due to its dual action mechanism: this technology realizes the sterilization function through active particles such as negative ions and ozone generated by the plasma, and at the same time uses the catalyst material to adsorb odor molecules and degrade them through catalytic reactions, so as to achieve the synergistic effect of odor removal and sterilization. Compared with single cold catalyst catalytic or photocatalytic technology, it has significant advantages in sterilization efficiency and odor treatment ability, and has become an important direction to break through the bottleneck of traditional technology.

[0034] However, the existing plasma-catalyzed catalytic technology faces significant challenges in practical applications: on the one hand, the technical solutions without an air circulation module rely on natural diffusion to achieve air flow, resulting in low contact efficiency between the catalyst material and polluted air, slow odor removal speed, and it is difficult to meet the rapid purification requirements in high-frequency use scenarios; on the other hand, the technical solutions equipped with an air circulation module (such as a fan) can actively promote air circulation and improve the odor removal efficiency, but the additional mechanical components not only increase the device cost, but also introduce operating noise and affect the user experience; in traditional designs, the difficult-to-degrade odor molecules adsorbed by the catalyst material may become a secondary pollution source due to the lack of effective treatment, and at the same time, if the ozone in the ion wind is not fully degraded, it may remain in the refrigerator and produce a pungent smell, further reducing the use experience. There is an urgent need for a new technical solution to solve this problem in order to achieve low-cost, noise-free and high-odor removal efficiency plasma-catalyzed catalytic sterilization.

[0035] The purpose of this application is to provide a plasma-catalyzed catalytic purification device suitable for refrigerators with low cost, no noise and high odor removal efficiency. The ionization component in the device generates an ion wind, which on the one hand drives the air circulation in the refrigerator cabinet to improve the odor removal efficiency; on the other hand, the ion wind contains trace amounts of ozone and a large number of negative ions, which diffuse into the refrigerator cabinet under the action of power to achieve sterilization and purification. At the same time, the ion wind directly acts on the catalytic module, which can effectively degrade the odor molecules adsorbed on the catalytic module, avoiding the catalytic block from adsorbing difficult-to-degrade odor molecules and becoming an odor source to affect the user experience. The present invention uses the ionization component to form an ion wind, and there is no need to additionally install an air circulation module in the device, which has the advantages of low cost, no noise and high odor removal efficiency.

[0036] Based on this, as Figures 1 to 6 shown, this application provides an ion wind odor and bacteria removal device, and the device includes:

[0037] A housing 4, a power supply module 5, an ionization component and a catalytic module 1; the housing 4 is used to fix the power supply module 5, the ionization component and the catalytic module 1, and the housing 4 includes an air inlet part 6 and an air outlet part; the power supply module 5 is used to provide an excitation voltage for the ionization component;

[0038] The ionization component includes a generating electrode 3 and a receiving electrode 2. The generating electrode 3 is installed between the air inlet part 6 and the air outlet part. The tip 7 of the generating electrode 3 faces the receiving electrode 2 and the air outlet part. The generating electrode 3 is a strip-shaped electrode or a circular electrode, and a plurality of sawteeth are provided on the generating electrode 3, and the sawtooth angle is 10-60°; the catalytic module 1 is used for adsorbing and degrading odors. The catalytic module 1 and the receiving electrode 2 are wrapped around, and the catalytic module 1 is provided with honeycomb holes, serving as the air outlet part.

[0039] The present application provides a plasma-assisted catalyst catalytic purification device suitable for a refrigerator, which is low-cost, noise-free and has a high odor purification efficiency. The ionization component in the device generates ion wind. On the one hand, it drives the air circulation in the refrigerator body to improve the odor purification efficiency; on the other hand, the ion wind contains trace amounts of ozone and a large number of negative ions, which diffuse into the refrigerator body under the action of power to achieve sterilization and purification. At the same time, the ion wind directly acts on the catalytic module, and can effectively degrade the odor molecules adsorbed on the catalytic module, avoiding the catalytic block adsorbing difficult-to-degrade odor molecules and becoming an odor source, which affects the user experience. The present invention uses the ionization component to form ion wind, and there is no need to additionally install an air circulation module in the device, which has the advantages of low cost, no noise and high odor purification efficiency.

[0040] In some embodiments, the curvature radius of the sawtooth tip changes in a gradient along the length direction of the electrode, and the adjacent sawtooth angles are alternately set to 10-60°.

[0041] The generating electrode uses a sawtooth-shaped electrode, the sawtooth angle is 10-60°, and the sawtooth-shaped electrode uses a laser cutting process; the shortest distance between the edge of the generating electrode and the receiving electrode is 7-15 mm, and it is designed that the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal. This is beneficial to the stability of discharge, avoiding strong discharge in some areas and weak discharge in other areas. The stability of discharge is beneficial to the stable production of active particles in the module, and is convenient for controlling the concentration of active particles in the refrigerator.

[0042] For example, the curvature radius of the sawtooth tip changes in a gradient along the length direction of the electrode (such as the front-end curvature radius is 0.1-0.3 μm, and the rear-end is 0.5-1 μm), and the adjacent sawtooth angles are alternately set to 10-60° (such as the first sawtooth is 15° and the second sawtooth is 45°).

[0043] The curvature radius of the sawtooth tip at the front end of the electrode is smaller (0.1-0.3 μm). The smaller the tip curvature, the higher the charge density, and the local electric field strength can be increased to 5×10 6Above V / m, significantly higher than that of traditional electrodes with equal curvature. The front end uses a smaller sawtooth angle (such as 10 - 20°), making the tip electric field more concentrated, triggering a violent electron avalanche effect and generating high-density ions. The high-speed ions collide with neutral molecules to transfer kinetic energy, forming a directional high-speed core flow with a wind speed of 5 - 8 m / s, effectively penetrating the complex storage structure inside the refrigerator and quickly reaching the source of odors.

[0044] The curvature radius of the sawtooth tip at the rear end of the electrode gradually increases to 0.5 - 1 μm, the electric field strength gradient decreases, the kinetic energy of the ion wind is converted into diffusion potential energy, forming a wide diffusion flow with a diffusion angle of 60 - 90°. The rear end uses a larger sawtooth angle (such as 40 - 60°) to expand the action area between the electrode and the receiving electrode, guiding the ion wind to diverge to both sides and covering the traditional airflow blind areas such as the edges and corners of the refrigerator inner liner. The measured data shows that this design can increase the ion wind coverage area inside the refrigerator by 70%, especially the odor removal efficiency at the top of the refrigerating chamber and the bottom of the drawer is increased by 55%.

[0045] In some embodiments, the generating electrode is a spiral three-dimensional structure with a spiral diameter of 2 - 5 mm, a pitch of 1 - 3 mm, the spiral axis coincides with the central axis of the receiving electrode, and micron-level grooves are opened on the electrode surface along the spiral direction, and rare earth permanent magnetic materials are filled in the grooves.

[0046] For example, the generating electrode can be designed as a spiral three-dimensional structure with a spiral diameter of 2 - 5 mm, a pitch of 1 - 3 mm, the spiral axis coincides with the central axis of the receiving electrode, and micron-level grooves (width 50 - 100 μm, depth 30 - 50 μm) are opened on the electrode surface along the spiral direction, and rare earth permanent magnetic materials (such as neodymium iron boron particles with a particle size ≤ 10 μm) are filled in the grooves.

[0047] The spatial structure with a spiral diameter of 2 - 5 mm and a pitch of 1 - 3 mm makes the electric field present a three-dimensional distribution. According to Gauss's theorem, the normal electric field component and the tangential component of the spiral surface form a vector synthesis, generating an axial electric field and a circumferential electric field along the spiral axis. The circumferential electric field component drives the ions to obtain a tangential velocity, which is synthesized with the axial velocity of the ions accelerated by the axial electric field, forming a spiral ion wind (the angular velocity can reach 10 - 15 rad / s). Compared with the one-dimensional linear airflow of traditional planar electrodes, the rotational characteristics of the spiral ion wind endow it with stronger entrainment ability, which can increase the efficiency of drawing the static air inside the refrigerator into the ionization area by 60%, especially the airflow coverage rate of dead corners such as behind the partition and the gap of the drawer is increased to more than 98%.

[0048] In some embodiments, the sawtooth tip is coated with a carbon nanotube - tungsten diselenide composite coating with a coating thickness of 50 - 200 nm.

[0049] The surface plasmon resonance effect of tungsten diselenide reduces the air ionization threshold voltage by 30 - 40% (from 3 - 5 kV to 2 - 3.5 kV). The high conductivity and field emission characteristics of carbon nanotubes increase the ion wind density by 15 times to 1.5×10 16 / m 3 , and at the same time, precise switching of plasma components is achieved through voltage range regulation.

[0050] Photo - electro - catalytic synergistic purification: Under ultraviolet light excitation, tungsten diselenide generates electron - hole pairs with high separation efficiency, which cooperate with active particles in the ion wind to form a dual degradation path, increasing the degradation rate of odor molecules such as methyl mercaptan by nearly 3 times, and increasing the removal rate of refractory benzene - like substances from 60% to 92%. The dense structure of the nano - coating (porosity

[0051] ≤0.1%) and material properties endow the electrode with super - strong corrosion resistance (the salt spray test life is increased by more than 40 times). At the same time, the flexibility of carbon nanotubes and the layered slip characteristics of tungsten diselenide achieve nano - level self - repair, so that the ionization efficiency attenuation after long - term use of the electrode is ≤5% (the traditional electrode attenuates by 30%). Low - voltage drive reduces the power consumption to 0.5 - 0.8 W (40 - 60% lower than the traditional one), and the annual energy consumption is reduced by about 5 kWh; the super - smooth characteristic of the coating surface (roughness Ra ≤ 20 nm) reduces the air flow resistance by 40%, and the noise is controlled below 25 dB (more than 10 dB lower than the traditional one), achieving a balance between high efficiency and low interference.

[0052] In some embodiments, the receiving electrode is a square electrode or a circular electrode, and the receiving electrode surrounds the catalytic module in a circle outside.

[0053] As Figure 3 and Figure 4 shown, the generating electrode can be a long - strip type or a circular type, designed to be serrated, and the serration angle is 10 - 60°; the receiving electrode can be a square type or a circular type, and the receiving electrode surrounds the catalytic block in a circle. The serrated electrode adopts a laser cutting process, with high processing accuracy and small error in the tip curvature radius, and the ozone concentration generated under the excitation of a high - voltage electric field is more stable.

[0054] When the generating electrode (such as a serrated one) is located at the geometric center due to the four - side symmetric structure of the square electrode, the distances from each side to the electrode tip are equal, forming an orthogonal and uniform electric field. The measured standard deviation of the electric field intensity is ≤5%, improving the ion wind uniformity by 30% compared with the asymmetric structure, and avoiding the uneven net - odor removal efficiency caused by local ionization blind spots.

[0055] Due to the central symmetric structure of the circular electrode, the electric field is radially distributed, and the electric field line density uniformly attenuates along the radius direction. When the ion wind diffuses from the center to the surroundings, the wind speed gradient is ≤10%, which is especially suitable for circular catalytic modules (to ensure 360° omnidirectional ionization coverage.

[0056] The receiving electrode surrounds the outside of the catalytic module to form an electric field constraint ring, forcing the ionic wind to flow along the normal direction of the catalytic module surface, avoiding the scattering loss of the traditional single-sided electrode. The vertical incidence rate of the ionic wind on the catalytic module is increased from 65% to 95%, and the effective contact area is expanded by 2.5 times, significantly enhancing the interaction efficiency between odor molecules and the catalytic material.

[0057] The annular receiving electrode enables the ionic wind to cover the entire outer surface of the catalytic module at a uniform flow rate, avoiding the problems of "proximal overload and distal underload" in the traditional structure. Taking the honeycomb pore catalytic module as an example, the gas flow permeability of the edge channels is increased from 40% to 90%, and the adsorption capacity of p-xylene is increased by 50%, fully releasing the purification potential of the catalytic material.

[0058] The distance between the receiving electrode and the catalytic module surface is designed to be 2 - 5 mm, forming a weak electric field region, promoting the interfacial reaction between ozone in the ionic wind and the active sites on the catalytic module surface. The ozone decomposition efficiency is increased to 98%, and at the same time, more hydroxyl radicals (OH) are generated, accelerating the degradation rate of odor molecules by 40%.

[0059] The annular gas flow flushes the entire surface of the catalytic module, which can timely remove the adsorbed refractory substances, avoiding the blockage of catalytic sites caused by local enrichment. The receiving electrode wraps the catalytic module, making the catalytic module exist in a positive charge atmosphere and being more vulnerable to the bombardment of charged particles, enhancing the degradation rate of the catalytic module for adsorbing odors.

[0060] In some possible implementation manners, the shortest distance between the generating electrode and the edge of the receiving electrode is 7 - 15 mm, and the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal.

[0061] As Figure 5 and Figure 6 shown, the shortest distance between the generating electrode and the edge of the receiving electrode is 7 - 15 mm, and it is designed that the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal, that is, the generating electrode is located on the geometric symmetry plane of the receiving electrode, and the distances from each sawtooth tip to the first receiving electrode edge 21 and the second receiving electrode edge 22 are equal. The distances from the first sawtooth tip and the last sawtooth tip of the generating electrode to the first receiving electrode edge 21, the second receiving electrode edge 22, and the third receiving electrode edge 23 are equal.

[0062] In some embodiments, the catalytic module is loaded with an odor degradation catalyst and an ozone degradation catalyst.

[0063] The catalytic module can adsorb odor molecules. Meanwhile, the catalytic module is loaded with an odor degradation catalyst and an ozone degradation catalyst. The odor degradation catalyst can combine with oxygen in the air to catalytically oxidize odor molecules; the ozone degradation catalyst can degrade part of the ozone in the ion wind to form a large number of free radicals, accelerating the odor degradation rate. The ion wind can also oxidize the substances that are difficult to degrade adsorbed by the catalytic module, reducing the activation energy of the degradation reaction and preventing the substances difficult to degrade adsorbed by the catalytic module from becoming odor sources.

[0064] The ion wind cooperates with the catalytic module to quickly remove odors and sterilize: The ion wind triggers an electron avalanche effect, driving air circulation and causing the gas in the refrigerator to flow into the ion wind odor removal and sterilization device. It can eliminate the air circulation module, reducing the device cost.

[0065] Meanwhile, the catalytic module will adsorb the odor molecules in the air brought by the ion wind, and the metal catalyst in the catalytic module catalytically oxidizes the odor molecules to degrade them, achieving the purpose of odor removal. On the other hand, the ion wind contains oxidizing components such as ozone and charged particles, which further react with the odors adsorbed by the catalytic module, reducing the activation energy of the catalyst catalysis and increasing the odor degradation rate. The remaining ozone and charged particles in the ion wind after passing through the catalytic module can kill the microorganisms in the refrigerator.

[0066] In some embodiments, the receiving electrode is an electrode with a small upper opening and a large lower opening. The opening of the receiving electrode closer to the serrated tip of the generating electrode is smaller, and the opening farther from the serrated tip of the generating electrode is larger.

[0067] The receiving electrode is designed with a small upper opening and a large lower opening, that is, the opening closer to the serrated tip of the generating electrode is smaller, and the opening farther from the serrated tip of the generating electrode is larger. This is beneficial for a greater wind speed and a wider wind surface at the air outlet.

[0068] The narrow upper region (with a distance of 7 - 15 mm from the generating electrode) forms a convergent nozzle structure. According to Bernoulli's equation, the ion wind accelerates in this region due to the reduction of the flow channel cross-sectional area. The expanded flow channel design at the lower opening guides the ion wind to diffuse in a horn shape, and the diffusion angle expands from 45° in the traditional structure to more than 120°, with the coverage area expanding by 3 times. For example, in a 200L refrigerator, this structure can reduce the time for the ion wind to reach the farthest shelf in the refrigerating compartment from 15 seconds in the traditional structure to 8 seconds, and the wind speed in the corner area increases by 40%, solving the problem of uneven air flow distribution of "strong at the proximal end and weak at the distal end".

[0069] The high-energy ionization is dominated in the near-field region of the upper opening, generating a large amount of ozone and free radicals, achieving strong sterilization for highly polluted food ingredients such as seafood and meat; the far-field region of the lower opening is mainly composed of negative ions, which is suitable for the fresh-keeping scenario of fruits and vegetables, inhibiting ethylene generation and extending the shelf life. This electric field-functional hierarchical design enables the device to simultaneously meet the differentiated purification requirements of different food ingredients.

[0070] A high-speed air flow forms a strong scouring force at the upper opening of the catalytic module, quickly stripping the adsorbed easily degradable substances (such as amines), while the velocity of the gradually expanding air flow decreases at the lower opening of the module, providing a longer catalytic reaction time for the hardly degradable substances (such as benzene series). The gradually expanding structure increases the proportion of the static pressure energy of the ionic wind at the outlet from 30% of the traditional structure to 50%, and part of the dynamic pressure energy is converted into static pressure energy to drive natural convection, which can reduce the output power of the power module by 15 - 20%.

[0071] In some embodiments, a gas sensor array is provided in the device to monitor the concentrations of hydrogen sulfide, trimethylamine odor molecules and ozone residue in the refrigerator in real time. The gas sensor array includes an odor sensor, an ozone concentration sensor, and a temperature and humidity sensor.

[0072] The odor sensor monitors the concentrations of key odor molecules such as hydrogen sulfide (H2S) and trimethylamine in real time (detection accuracy

[0073] ≤0.1 ppm). When the concentration exceeds the threshold (such as H2S > 0.5 ppm), the microcontroller (MCU) automatically increases the output voltage of the power module, and increases the electric field strength of the discharge electrode from the reference value of 3×10 6 V / m to 4.5×10 6 V / m. The ionic wind speed correspondingly increases from 5 m / s to 8 m / s, and the degradation rate of odor molecules increases by 60%, realizing the adaptive purification of "pollution surge - rapid response". For example, when the user stores seafood, the device can reduce the odor concentration from 1.2 ppm to 0.3 ppm within 10 minutes, shortening the purification time by 50% compared with the traditional fixed power mode.

[0074] The ozone concentration sensor provides real-time feedback on the ozone residue in the ionic wind (resolution 0.01 ppm). When the detected value approaches the national standard upper limit (0.15 ppm), the system automatically adjusts the operating frequency of the discharge electrode, reduces the proportion of the high-energy ionization period, and simultaneously enhances the ozone degradation catalyst activity of the catalytic module (such as raising the module temperature to 35°C through a heating element), increasing the ozone decomposition efficiency from 85% to 98%, and stably controlling the residue below 0.05 ppm to avoid the oxidative damage of excessive ozone to food ingredients and the health risks to users.

[0075] When the ionic wind odor and bacteria removal device works, due to the small curvature radius of the sawtooth tip of the discharge electrode, the electric field strength there is very high, causing the air nearby to be ionized, generating free electrons and positive ions. The free electrons are accelerated in the electric field, collide with neutral molecules to release more electrons, triggering an electron avalanche effect. The high-speed ions collide with the surrounding neutral air molecules, transferring kinetic energy to the neutral molecules. The directional movement of a large number of neutral molecules forms a macroscopic air current, namely the ionic wind. The ionic wind sweeps across the catalytic module, and the ozone degradation catalyst in the catalytic module degrades part of the ozone in the ionic wind, forming a large number of free radicals, which accelerates the odor degradation rate. At the same time, the ionic wind will also oxidize and degrade the difficult-to-degrade substances adsorbed by the catalytic module. The ionic wind passes through the honeycomb holes of the catalytic module and blows out from the air outlet part. There is still some ozone and negative ions in the blown ionic wind, which reach various parts inside the refrigerator for sterilization. External air flows into the ionic wind odor and bacteria removal device from the air inlet part and is ionized and excited to form a new ionic wind, and so on.

[0076] In some embodiments, such as Figure 7 shown, the present application provides a refrigerator, which includes the ionic wind odor and bacteria removal device 10 described in the above embodiments.

[0077] The present application realizes rapid odor and bacteria removal by ionic wind inside the refrigerator. It uses a sawtooth tip as the discharge electrode to ionize the air to generate ionic wind, and combines with a catalytic module to achieve odor removal. At the same time, the ozone and negative ions in the ionic wind can sterilize the refrigerator. The present application can achieve rapid odor removal without an air circulation module, and has the advantages of low cost, no noise, and fast odor removal. At the same time, the design requirements of the ionization component are clarified, and it has the advantages of stable ozone production and high ionic wind speed. On the other hand, by combining the ionic wind with the catalytic module, the catalytic module adsorbs and degrades odors, and the ionic wind synergistically oxidizes and degrades odors with the catalytic module, which improves the odor degradation rate and avoids the poisoning and failure of the catalytic module.

[0078] Embodiment 1

[0079] An ionic wind odor and bacteria removal device and a refrigerator. The ionic wind odor and bacteria removal device includes a housing, a power supply module, an ionization component, and a catalytic module. The discharge electrode in the ionization component is strip-shaped and designed as a sawtooth shape, with a sawtooth angle of 20°. The receiving electrode in the ionization component is square, and the receiving electrode surrounds the catalytic block in a circle. The shortest distance between the discharge electrode and the edge of the receiving electrode is designed to be 10 mm, and it is designed that the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal, that is, the discharge electrode is located on the geometric symmetry plane of the receiving electrode, and the distance from each sawtooth tip to the first receiving electrode edge 21 and the second receiving electrode edge 22 is 10 mm. The catalytic module uses a transition metal catalyst and can degrade odors and ozone simultaneously.

[0080] As can be seen from the above embodiments, the present application provides an ion wind odor purification and sterilization device and a refrigerator. The device includes: a housing, a power supply module, an ionization component, and a catalytic module; the housing is used to fix the power supply module, the ionization component, and the catalytic module, and the housing includes an air inlet part and an air outlet part; the power supply module is used to provide an excitation voltage to the ionization component; the ionization component includes a generating electrode and a receiving electrode, wherein the generating electrode is installed between the air inlet part and the air outlet part, the tip of the generating electrode faces the receiving electrode and the air outlet part, the generating electrode is a strip-shaped electrode or a circular electrode, and a plurality of sawteeth are provided on the generating electrode, and the sawtooth angle is 10-60°; the catalytic module is used to adsorb and degrade odors, the catalytic module wraps around the receiving electrode, and honeycomb holes are provided on the catalytic module, serving as the air outlet part. In the present application, the sawtooth tip is used as the generating electrode to ionize air to generate ion wind, and the catalytic module is combined to achieve odor purification. At the same time, the ozone and negative ions of the ion wind can sterilize the refrigerator. At the same time, without an air circulation module, rapid odor purification can be achieved, with the advantages of low cost, no noise, and fast odor purification.

[0081] For the similar parts between the embodiments provided in the present application, reference can be made to each other. The specific embodiments provided above are only several examples under the general concept of the present application and do not constitute a limitation on the protection scope of the present application. For those skilled in the art, any other embodiments extended based on the solution of the present application without creative efforts belong to the protection scope of the present application.

Claims

1. An ion wind odor removal and sterilization device, characterized in that, The device includes: a housing, a power supply module, an ionization component, and a catalytic module; the housing is used to fix the power supply module, the ionization component, and the catalytic module, and the housing includes an air inlet part and an air outlet part; the power supply module is used to provide an excitation voltage to the ionization component; the ionization component includes a generating electrode and a receiving electrode, wherein the generating electrode is installed between the air inlet part and the air outlet part, the tip of the generating electrode faces the receiving electrode and the air outlet part, the generating electrode is a strip-shaped electrode or a circular electrode, and a plurality of sawteeth are provided on the generating electrode, and the sawtooth angle is 10 - 60°; the catalytic module is used to adsorb and degrade odors, the catalytic module wraps around the receiving electrode in a circle, and honeycomb holes are provided on the catalytic module as the air outlet part.

2. The ion wind odor purification and sterilization device according to claim 1, characterized in that The curvature radius of the sawtooth tip changes in a gradient along the length direction of the electrode, and the adjacent sawtooth angles are alternately set to 10 - 60°.

3. The ion wind odor removal and sterilization device according to claim 1, wherein, The generating electrode is a spiral three-dimensional structure, with a spiral diameter of 2 - 5 mm, a pitch of 1 - 3 mm, the spiral axis coincides with the central axis of the receiving electrode, and microgrooves are opened on the electrode surface along the spiral direction, and rare earth permanent magnetic materials are filled in the grooves.

4. The ion wind odor and bacteria removal device according to claim 3, characterized in that, The sawtooth tip is coated with a carbon nanotube-tungsten diselenide composite coating, and the coating thickness is 50 - 200 nm.

5. The ion wind odor removal and sterilization device according to claim 1, characterized in that The receiving electrode is a square electrode or a circular electrode, and the receiving electrode surrounds the catalytic module in a circle outside.

6. The ion wind odor removal and sterilization device according to claim 1, wherein The shortest distance between the edge of the generating electrode and the receiving electrode is 7 - 15 mm, and the shortest distance from each sawtooth tip to the edge of the receiving electrode is equal.

7. The ion wind odor removal and sterilization device according to claim 1, characterized in that The catalytic module is loaded with an odor degradation catalyst and an ozone degradation catalyst.

8. The ion wind odor removal and sterilization device according to claim 1, wherein, The receiving electrode has a smaller upper opening and a larger lower opening, and the opening of the receiving electrode closer to the sawtooth tip of the generating electrode is smaller, and the opening farther from the sawtooth tip of the generating electrode is larger.

9. The ion wind odor removal and sterilization device according to claim 1, characterized in that A gas sensor array is provided in the device to monitor the concentrations of hydrogen sulfide and trimethylamine odor molecules and the ozone residue in the refrigerator in real time. The gas sensor array includes an odor sensor, an ozone concentration sensor, and a temperature and humidity sensor.

10. A refrigerator, characterized in that, The refrigerator includes the ion wind odor and bacteria purification device according to any one of claims 1 to 9.

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