Plasma generation module, oil stain decomposition device, range hood and control method of range hood

Abstract

The invention relates to the technical field of household appliances, and discloses a plasma generation module, an oil stain decomposition device, a range hood and a control method of the range hood. The electrode structure comprises a dielectric tube, a high-voltage electrode and a low-voltage electrode, and the high-voltage electrode and the low-voltage electrode are wound outside the dielectric tube at a set interval; the electrode structure is inserted into a mounting hole of the support, a glue filling groove is formed in the support, the glue filling groove is filled with insulating glue, and the insulating glue is plastically packaged outside the electrode structure; a hollow channel is formed in the dielectric tube, and the high-voltage electrode and the low-voltage electrode conduct dielectric barrier discharge in the dielectric tube and generate plasma. Dielectric barrier discharge is performed in the dielectric tube, and the exterior of the electrode structure is subjected to insulation plastic package, so that the problems of corrosion, electrode breakdown and creepage caused by exposure of the high-voltage electrode and the low-voltage electrode in a high-humidity and high-pollution lampblack environment can be effectively avoided, the service life of the plasma generation module is prolonged, and the safety of the plasma generation module is improved.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, specifically to a plasma generation module, an oil decomposition device, a range hood, and a control method thereof. Background Technology

[0002] Efficiently removing grease from kitchen appliances such as range hoods has always been a challenge in the industry. Traditional cleaning methods, such as soaking in chemical solvents, high-pressure water rinsing, or physical scrubbing, suffer from low cleaning efficiency, long processing times, potential corrosion of metal surfaces, and chemical residues. While plasma cleaning technology is used for cleaning precision components, it faces significant challenges when applied to treating grease in range hoods.

[0003] First, the active substances generated by plasma discharge (such as OH radicals and O3) have extremely short lifespans (microseconds), making them difficult to effectively act on oily surfaces. Second, heat accumulation during plasma discharge can easily lead to electrode breakdown, limiting equipment stability. Furthermore, the active substances cannot diffuse in a directional manner, making it impossible to achieve precise action over long distances. In particular, the existing structure of plasma generation modules is not suitable for high humidity and high oil environments, resulting in shortened lifespan and low efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a plasma generating module, an oil decomposition device, a range hood and a control method thereof, to solve the problems that the plasma generating module in the prior art is not suitable for the high humidity and high oil environment of the range hood, and that the active substances generated by plasma discharge are difficult to effectively act on the oil surface.

[0005] In a first aspect, the present invention provides a plasma generating module, comprising: The bracket has mounting holes; The electrode structure includes a dielectric tube, a high-voltage electrode, and a low-voltage electrode, with the high-voltage electrode and the low-voltage electrode wound around the outside of the dielectric tube at a predetermined interval; The electrode structure is inserted into the mounting hole. The bracket is equipped with a potting groove, which is filled with insulating glue. The insulating glue is then sealed to the outside of the electrode structure. The dielectric tube has a hollow channel inside, where high-voltage and low-voltage electrodes perform dielectric barrier discharge and generate plasma.

[0006] Beneficial effects: The electrode structure does not adopt the conventional design of dielectric barrier discharge on the outer wall of the dielectric tube. Instead, both the high-voltage and low-voltage electrodes are wrapped around the outside of the dielectric tube, and a potting groove is set on the bracket for mounting the electrode structure. By filling the potting groove with insulating glue, the outside of the electrode structure is insulated and encapsulated to isolate it from humid air and pollutants. This effectively avoids the high-voltage and low-voltage electrodes from being exposed to a high-humidity, high-pollution oil fume environment, which is prone to corrosion, electrode breakdown and creepage problems, thus improving the service life and safety of the plasma generation module.

[0007] Furthermore, by hollowing out the inside of the dielectric tube, the high-voltage and low-voltage electrodes can perform dielectric barrier discharge on the inner wall of the dielectric tube, achieving stable plasma generation. The generated plasma can be directionally output along the hollow channel inside the dielectric tube, allowing the active substances in the plasma to accurately act on the oil stain surface, achieving the goal of long-distance, precise, and efficient decomposition of oil stains, thereby improving the oil stain decomposition efficiency. This effectively solves the problems in existing technologies where plasma generation modules are not suitable for high-humidity, high-oil environments like range hoods, and where the active substances generated by plasma discharge are difficult to effectively act on the oil stain surface.

[0008] In one alternative implementation, the support includes: The main body of the bracket is plate-shaped, and mounting holes are made on the main body of the bracket. The surrounding panel is fixedly installed on the outer periphery of the main body of the support frame, and the surrounding panel and the main body of the support frame together form a glue-filling groove.

[0009] Beneficial effects: The main body of the bracket is plate-shaped and has a surrounding plate forming a glue-filling groove. The structure is simple and easy to process and shape. During assembly, after the electrode structure is inserted into the mounting hole, glue is poured into the glue-filling groove. On the one hand, the assembly of the electrode structure is more reliable and stable. On the other hand, it can play a good role in insulation, moisture isolation and pollution isolation, avoiding short circuit problems caused by oil or moisture. It is more suitable for the complex environment inside the range hood, improving the reliability and applicability of the entire device.

[0010] In one optional embodiment, a surrounding panel is disposed on the outer periphery of the support body, the support body having a first side and a second side disposed opposite to each other, and the surrounding panel includes: The first enclosure plate is fixedly installed on the outer periphery of the first side of the main body of the bracket, and the first enclosure plate and the first side side form a first glue-filling groove. The second enclosure is fixedly installed on the outer periphery of the second side of the main body of the bracket, and the second enclosure and the second side form a second glue-filling groove. The middle part of the electrode structure is inserted into the mounting hole. The high-voltage electrode and the low-voltage electrode are distributed on both sides of the bracket body. One of the high-voltage electrode and the low-voltage electrode is located in the first glue-filling groove and the other is located in the second glue-filling groove.

[0011] Beneficial effects: By setting a first and a second enclosure plate on both sides of the support body, two potting grooves are formed on both sides of the support. During assembly, the middle part of the electrode structure is inserted into the mounting hole. The symmetrical double-groove structure can improve the balance and stability of the entire plasma generation module. Moreover, by distributing the high-voltage electrode and the low-voltage electrode on both sides of the support body, and placing them in different potting grooves, the insulation effect can be further optimized and the risk of electrode breakdown can be reduced.

[0012] In one optional embodiment, the bracket is provided with a plurality of mounting holes spaced apart, and the electrode structure has a plurality of electrodes, which are inserted into the plurality of mounting holes in a one-to-one correspondence.

[0013] Beneficial effects: The high-voltage and low-voltage electrodes of the multiple electrode structures are connected to the high-voltage power supply respectively, realizing centralized control, reducing wiring complexity and energy consumption, simplifying circuit design, and reducing costs.

[0014] In one optional implementation, the plasma generating module further includes: In a high-voltage power supply, high-voltage electrodes with multiple electrode structures are connected to the high-voltage port of the high-voltage power supply, and low-voltage electrodes with multiple electrode structures are connected to the low-voltage port of the high-voltage power supply.

[0015] Beneficial effects: The high-voltage and low-voltage electrodes of the multiple electrode structures are connected to the high-voltage power supply respectively, realizing centralized control, reducing wiring complexity and energy consumption, simplifying circuit design, and reducing costs.

[0016] Secondly, the present invention also provides an oil stain decomposition device, comprising: Plasma generating module of any of the above embodiments; The atomization module generates water mist, which combines with the plasma generated by the plasma generation module to form active droplets that decompose oil stains.

[0017] Beneficial Effects: The oil stain decomposition device achieves highly efficient oil stain removal by integrating a plasma generation module and an atomization module. The atomization module first atomizes water into micron-sized droplets with a particle size of 10-50 micrometers. These droplets come into full contact with the dielectric barrier discharge plasma, causing the active substances generated by the plasma (such as OH free radicals) to dissolve or adsorb onto the surface of the droplets, forming long-lived active droplets. This process significantly extends the lifespan of the active substances, enhancing their transport capacity and extending their effective action time from the microsecond level. Subsequently, the active droplets form a uniform coating on the metal surface, where the free radicals react with the organic matter in the oil stains, breaking covalent bonds such as C and CH, thereby destroying the molecular structure of the oil stains and promoting their detachment. Simultaneously, the dielectric barrier discharge plasma introduces polar groups (such as hydroxyl and carboxyl groups) onto the metal surface, enhancing surface hydrophilicity, weakening the wettability and adhesion of the oil stains, and ultimately improving the oil stain removal efficiency.

[0018] In one alternative implementation, the atomizing module includes: Atomizing unit, which is suitable for converting water into water mist; The airflow drive unit is adapted to drive water mist from one end of the hollow channel of the medium tube to the other end, so as to decompose the oil stains in the set target cleaning area.

[0019] Beneficial effects: By employing the atomizing unit and the airflow driving unit to work together, water mist is driven through the hollow channel of the medium tube and fully contacts the plasma inside the insulating tube. The airflow not only carries activated droplets, enabling targeted coverage of the target cleaning area and enhancing its transmission capacity, but also ensures the accuracy and uniformity of oil decomposition. It is especially suitable for complex structures such as range hood ducts. Furthermore, it plays a role in convective heat dissipation, preventing electrode overheating and improving system stability.

[0020] Thirdly, the present invention also provides a range hood, including a smoke collection hood and an oil decomposition device of any of the above embodiments disposed within the smoke collection hood.

[0021] Beneficial effects: By integrating the above-mentioned oil decomposition device into the range hood, the device is controlled to work when the self-cleaning mode is activated, eliminating the need to disassemble the smoke collection hood for cleaning. This achieves automated maintenance, improves the user experience, reduces the use of chemical solvents, and is in line with environmental protection principles.

[0022] Fourthly, the present invention also provides a control method applicable to the above-mentioned range hood, the control method comprising: Obtain the operating time of the range hood; The working mode of the oil decomposition device is determined based on the working time of the range hood. Based on the determined working mode of the oil decomposition device, control the oil decomposition device to operate with the corresponding working parameters to decompose the oil in the fume hood. The operating parameters include the operating power of the plasma generation module and the atomization amount of the atomization module.

[0023] Beneficial effects: The longer a range hood operates, the more severe the grease buildup becomes. By dynamically selecting the operating mode of the grease decomposition device based on the range hood's operating time, and intelligently adjusting the working power and atomization amount of the plasma generation module, adaptive cleaning is achieved, optimizing energy consumption and cleaning effect. For example, a low-power mode is used when the grease is lightly polluted to avoid over-cleaning and improve energy efficiency.

[0024] In one optional implementation, after the oil decomposition device completes the oil decomposition work, the following steps are also performed: Control the range hood's fan to rotate at high speed, using centrifugal force to remove the decomposed grease from the fan impeller.

[0025] Beneficial effects: After the oil decomposition device completes the oil decomposition work, the fan is controlled to rotate at high speed, and centrifugal force is used to remove the oil from the impeller. This achieves thorough removal of oil, avoids residue, and improves overall cleanliness and equipment life. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the plasma generating module in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the bracket in an embodiment of the present invention; Figure 3 This is a schematic diagram of the electrode structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the oil decomposition device in an embodiment of the present invention; Figure 5 This is a flowchart illustrating one embodiment of the control method for a range hood in this invention.

[0028] Explanation of reference numerals in the attached figures: 10. Plasma generation module; 11. Bracket; 110. Mounting hole; 111. Glue potting tank; 112. Bracket body; 113. First enclosure plate; 114. Second enclosure plate; 115. Insulating glue; 12. Electrode structure; 120. Hollow channel; 121. Dielectric tube; 122. High-voltage electrode; 123. Low-voltage electrode; 124. Discharge region; 13. High-voltage power supply; 131. High-voltage port; 132. Low-voltage port; 20. Atomization module. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Over time, grease from kitchen fumes condenses and accumulates on the metal surfaces of filters, ducts, and impellers, forming highly viscous oil stains. Traditional cleaning methods (such as soaking in chemical solvents, high-pressure water rinsing, or physical scrubbing) have significant drawbacks: low cleaning efficiency (each cleaning session takes more than 30 minutes), time-consuming, prone to corroding metal surfaces, require disassembly leading to inconvenience, and chemical solvents may leave harmful residues.

[0034] In related technologies, some plasma cleaning technologies are used to treat surface contaminants, but they are mostly used for cleaning precision electronic or optical devices and have not effectively solved the problem of removing oil stains from the complex internal structure of range hoods. At the same time, the plasma cleaning process has the following problems: (1) The active substances generated by plasma (such as OH free radicals and O3) have extremely short lifespans (microseconds) and are difficult to effectively act on the oil stain surface; (2) The heat accumulation of plasma discharge can easily lead to electrode breakdown, limiting the stability of the equipment; (3) The active substances cannot diffuse in a directional manner and cannot achieve precise action over a long distance; (4) The electrode structure of the existing plasma generation module is directly exposed to the outside. In the high temperature, high humidity and high oil kitchen environment, it is easy to come into contact with contaminants, air and water, which can easily lead to corrosion and conductivity, resulting in shortened lifespan, low efficiency and certain safety hazards. Therefore, an innovative technology is urgently needed to solve the industry pain point of the difficulty in efficiently and in-situ cleaning of oil stains.

[0035] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, in one aspect, the present invention provides a plasma generating module 10, comprising: a support 11 and an electrode structure 12; the support 11 is provided with a mounting hole 110; the electrode structure 12 includes a dielectric tube 121, a high-voltage electrode 122 and a low-voltage electrode 123, the high-voltage electrode 122 and the low-voltage electrode 123 being wound around the dielectric tube 121 at a predetermined interval; the electrode structure 12 is inserted into the mounting hole 110; the support 11 is provided with a potting groove 111, the potting groove 111 being filled with insulating adhesive 115, the insulating adhesive 115 being plastic-sealed around the electrode structure 12; the dielectric tube 121 has a hollow channel 120 inside, and the high-voltage electrode 122 and the low-voltage electrode 123 perform dielectric barrier discharge inside the dielectric tube 121 to generate plasma.

[0037] In the above embodiment, the electrode structure 12 does not adopt the conventional design of dielectric barrier discharge on the outer wall of the dielectric tube 121. Instead, it wraps both the high-voltage electrode 122 and the low-voltage electrode 123 around the dielectric tube 121, and sets a potting groove 111 on the bracket 11 for mounting the electrode structure 12. By filling the potting groove 111 with insulating glue 115, the outside of the electrode structure 12 is insulated and encapsulated to isolate humid air and pollutants. This effectively avoids the high-voltage electrode 122 and the low-voltage electrode 123 from being exposed to a high-humidity, high-pollution oil fume environment, which is prone to corrosion, electrode breakdown and creepage problems, thus improving the service life and safety of the plasma generation module 10.

[0038] Furthermore, by hollowing out the interior of the dielectric tube 121, the high-voltage electrode 122 and the low-voltage electrode 123 can perform dielectric barrier discharge on the inner wall of the dielectric tube 121, achieving stable plasma generation. The generated plasma can be directionally output along the hollow channel 120 inside the dielectric tube 121, allowing the active substances in the plasma to accurately act on the oil stain surface, achieving the purpose of long-distance, precise, and efficient decomposition of oil stains, thereby improving the oil stain decomposition efficiency. This effectively solves the problems of the plasma generation module 10 in the prior art being unsuitable for high-humidity and high-oil environments of range hoods, and the difficulty of the active substances generated by plasma discharge effectively acting on the oil stain surface.

[0039] Furthermore, in this embodiment, by performing dielectric barrier discharge on the inner wall of the dielectric tube, the generated plasma is concentrated entirely within the hollow channel 120 of the dielectric tube, resulting in a higher plasma concentration and better oil removal effect. This avoids the problems of plasma diffusion and overflow caused by conventional dielectric barrier discharge on the outer wall of the dielectric tube, which makes it inconvenient to collect and direct the plasma to the designated target cleaning area.

[0040] Based on the above embodiments, as a further defined implementation, the dielectric tube 121 is an insulating tube, including but not limited to ceramic tubes, glass tubes, and quartz tubes. The high-voltage electrode 122 and the low-voltage electrode 123 are wound around the outer periphery of the dielectric tube 121 at least once. The inner wall of the dielectric tube 121 between the high-voltage electrode 122 and the low-voltage electrode 123 forms a discharge region 124. When the electrode structure 12 is energized, the high-voltage electrode 122 and the low-voltage electrode 123 perform dielectric barrier discharge in the discharge region 124.

[0041] Based on the above embodiments, as a further defined implementation, the bracket 11 is made of plastic, and the depth of the potting groove 111 is greater than the distance between the high-voltage electrode 122 and the low-voltage electrode 123, ensuring that the insulating adhesive 115 at least covers the outer surfaces of the high-voltage electrode 122 and the low-voltage electrode 123, thus guaranteeing the creepage distance. Preferably, the insulating adhesive 115 covers the entire outer surface of the electrode structure 12. The insulating adhesive 115 is epoxy resin.

[0042] In some embodiments, the bracket 11 includes a bracket body 112 and a surrounding plate. The bracket body 112 is plate-shaped, and mounting holes 110 are formed on the bracket body 112. The surrounding plate is fixedly disposed on the outer periphery of the bracket body 112, and the surrounding plate and the bracket body 112 together form a glue-filling groove 111.

[0043] In the above embodiment, the main body 112 of the bracket is plate-shaped and has a surrounding plate forming a glue-filling groove 111. The structure is simple and easy to process and shape. During assembly, after the electrode structure 12 is inserted into the mounting hole 110, glue is poured into the glue-filling groove 111. On the one hand, the assembly of the electrode structure 12 is more reliable and stable. On the other hand, it can play a good role in insulation, moisture isolation and pollution isolation, avoiding short circuit problems caused by oil or moisture. It is more suitable for the complex environment inside the range hood and improves the reliability and applicability of the whole device.

[0044] In some embodiments, a surrounding plate is disposed on the outer periphery of the support body 112. The support body 112 has a first side and a second side disposed opposite to each other. The surrounding plate includes a first surrounding plate 113, which is fixedly disposed on the outer periphery of the first side of the support body 112. The first surrounding plate 113 and the first side form a first potting groove. A second surrounding plate 114 is fixedly disposed on the outer periphery of the second side of the support body 112. The second surrounding plate 114 and the second side form a second potting groove. The middle part of the electrode structure 12 is inserted into the mounting hole 110. The high voltage electrode 122 and the low voltage electrode 123 are distributed on both sides of the support body 112. One of the high voltage electrode 122 and the low voltage electrode 123 is located in the first potting groove and the other is located in the second potting groove.

[0045] In the above embodiment, by providing a first enclosure plate 113 and a second enclosure plate 114 on both sides of the support body 112, two potting grooves 111 are formed on both sides of the support 11. During assembly, the middle part of the electrode structure 12 is inserted into the mounting hole 110. The symmetrically arranged double-groove structure can improve the balance and stability of the entire plasma generation module 10. Moreover, by distributing the high-voltage electrode 122 and the low-voltage electrode 123 on both sides of the support body 112, and placing them in different potting grooves 111, the insulation effect can be further optimized and the risk of electrode breakdown can be reduced.

[0046] Based on the above embodiments, as a further defined implementation, the support body 112 is a flat plate structure with a certain thickness. The shape of the support body 112 can be square, circular, polygonal or other irregular shape. The shape of the support body 112 can be adapted to the actual installation scenario of the plasma module.

[0047] Based on the above embodiments, as a further defined implementation, the first side and the second side are the plate surfaces of the support body 112, the depth of the first potting groove is greater than the distance between the high voltage electrode 122 and the first side of the support body 112, and the depth of the second potting groove is greater than the distance between the low voltage electrode 123 and the second side of the support body 112, thereby ensuring that the insulating glue 115 on both sides can cover the high voltage electrode 122 and the low voltage electrode 123 after potting.

[0048] In some embodiments, the bracket 11 is provided with a plurality of mounting holes 110 spaced apart, and the electrode structure 12 is provided in a plurality of manner, with the plurality of electrode structures 12 being inserted into the plurality of mounting holes 110 in a one-to-one correspondence.

[0049] In the above embodiment, the bracket 11 is provided with multiple mounting holes 110, which are used to install multiple electrode structures 12, so that the plasma covers a wider area, ensuring uniform plasma distribution, avoiding dead corners, and improving the comprehensiveness and efficiency of oil decomposition.

[0050] Based on the above embodiments, as a further defined implementation, the diameter of the mounting hole 110 is adapted to the outer diameter of the medium tube 121, and the distance between two adjacent mounting holes 110 is twice the diameter of the mounting hole 110.

[0051] In some embodiments, the plasma generating module 10 further includes a high-voltage power supply 13, wherein the high-voltage electrodes 122 of the plurality of electrode structures 12 are uniformly connected to the high-voltage port 131 of the high-voltage power supply 13, and the low-voltage electrodes 123 of the plurality of electrode structures 12 are uniformly connected to the low-voltage port 132 of the high-voltage power supply 13.

[0052] In the above embodiments, the high-voltage electrodes 122 and low-voltage electrodes 123 of the multiple electrode structures 12 are uniformly connected to the high-voltage power supply 13, realizing centralized control, reducing wiring complexity and energy consumption, simplifying circuit design, and reducing costs.

[0053] Based on the above embodiments, as a further defined implementation, the high-voltage electrodes 122 of the multiple electrode structures 12 are connected to the high-voltage port 131 of the high-voltage power supply 13 through the first wire, and the low-voltage electrodes 123 of the multiple electrode structures 12 are connected to the low-voltage port 132 of the high-voltage power supply 13 through the second wire. Both the first wire and the second wire are encapsulated in insulating glue 115, thereby effectively preventing the first wire and the second wire from being exposed to the outside, which is prone to moisture and short circuits.

[0054] Based on the above embodiments, as a further defined implementation, the support body 112 is a square plate structure, with surrounding plates arranged around its four perimeters. The plate surface of the support body 112 is vertically arranged, and the top surfaces of the first surrounding plate 113 and the second surrounding plate 114 located at the top of the support body 112 form a support platform for mounting the high-voltage power supply 13. The high-voltage power supply 13 is mounted on the top of the support body 112, and the first surrounding plate 113 and the second surrounding plate 114 are respectively provided with wire-passing holes for the first and second wires to pass through.

[0055] According to an embodiment of the present invention, on the other hand, such as Figure 4 As shown, an oil stain decomposition device is provided, including a plasma generating module 10 and an atomizing module 20 according to any of the above embodiments. The atomizing module 20 can generate water mist, and the water mist and the plasma generated by the plasma generating module 10 form active droplets to decompose oil stains.

[0056] In this embodiment, the oil decomposition device achieves efficient oil removal by integrating the plasma generation module 10 and the atomization module 20. The atomization module 20 first atomizes water into micron-sized droplets with a particle size of 10-50 micrometers. These droplets come into full contact with the dielectric barrier discharge plasma, causing the active substances generated by the plasma (such as OH radicals) to dissolve or adsorb onto the surface of the droplets, forming long-lived active droplets. This process significantly extends the lifespan of the active substances, enhances their transport capacity, and extends their effective action time from the microsecond level. Subsequently, the active droplets form a uniform coating on the metal surface, where the free radicals react with the organic matter in the oil, breaking covalent bonds such as CC and CH, thereby destroying the molecular structure of the oil and promoting its detachment. Simultaneously, the dielectric barrier discharge plasma introduces polar groups (such as hydroxyl and carboxyl groups) onto the metal surface, enhancing surface hydrophilicity, weakening the wettability and adhesion of the oil, and ultimately improving the oil removal efficiency.

[0057] In some embodiments, the atomizing module 20 includes an atomizing unit and an airflow driving unit. The atomizing unit is adapted to convert water into water mist. The airflow driving unit is adapted to drive the water mist from one end of the hollow channel 120 of the medium tube 121 to the other end, so as to decompose the oil stains in the set target cleaning area.

[0058] In the above embodiments, by employing the atomizing unit and the airflow driving unit to work together, water mist is driven through the hollow channel 120 of the medium tube and fully contacts the plasma inside the insulating tube. The airflow not only carries activated mist droplets, enabling targeted coverage of the target cleaning area and enhancing its transmission capacity, but also ensures the accuracy and uniformity of oil decomposition. This is especially suitable for complex structures such as range hood ducts. Furthermore, it also plays a role in convective heat dissipation, preventing electrode overheating and improving system stability.

[0059] Based on the above embodiments, as a further defined implementation, the atomizing module 20 is located at one end of the media tube. Water mist enters from one end of the media tube, and plasma-containing active droplets are discharged from the other end of the media tube, which faces the target cleaning area. The atomizing unit includes a water tank and an atomizer. The atomizer is adapted to convert water in the water tank into water mist. The airflow driving unit includes a fan, which drives airflow from one end of the media tube to the other end. The fan can blow the water mist generated by the atomizing unit from one end of the media tube to the other end.

[0060] This embodiment provides an oil decomposition device, mainly comprising a plasma generation module 10 and an atomization module 20 for dielectric barrier discharge. The plasma generation module 10 generates highly reactive free radicals and ions, such as OH·, O·, and O3, which are strong oxidizing substances. The atomization unit of the atomization module 20 atomizes tap water into micron-sized droplets to encapsulate the active substances in the dielectric barrier discharge plasma, extending their lifespan and enhancing their transport capacity. An airflow drive unit guides the flow direction of the droplets and active substances, achieving precise coverage of the target area.

[0061] In specific operation, the plasma generation module 10 is first activated. The high-voltage power supply 13 outputs a high voltage on the high-voltage electrode 122 and the low-voltage electrode 123, creating a high-voltage electric field between the two electrodes to form a discharge region 124. Under the influence of this electric field, the air in the discharge region 124 on the inner surface of the dielectric tube 121 undergoes a low-temperature dielectric barrier discharge, generating plasma and releasing a large amount of highly reactive oxidizing substances. For example... Figure 3 As shown, the electrode structure 12 of the plasma generating module 10 in this embodiment is generally tubular. The electrode structure 12 includes a dielectric tube 121, a high-voltage electrode 122, and a low-voltage electrode 123. The inner diameter of the dielectric tube 121 is 1-3 mm, and the dielectric tube 121 is preferably made of ceramic or quartz material. The thickness of the dielectric tube 121 is between 0.5-1.5 mm, and the length of the dielectric tube 121 is 8-15 mm. The high-voltage electrode 122 and the low-voltage electrode 123 are made of conductive material, such as copper wire. In this embodiment, the hollow channel 120 of the dielectric tube 121 is the passage area for gas and droplets, and also the region where dielectric barrier discharge plasma is generated. In this region, the active material of dielectric barrier discharge plasma (a key factor in decomposing oil stains) combines with the droplets.

[0062] Furthermore, such as Figure 1 and Figure 2As shown, the electrode structure 12 is assembled in the mounting hole 110 of the porous bracket 11. The shape of the bracket 11 can be arbitrarily varied, preferably circular, square, etc. The mounting hole 110 is a hole that matches the outer diameter of the dielectric tube 121. The upper and lower sides of the bracket body 112 are provided with side plates protruding to both sides, one side being a first side plate 113 and the other side being a second side plate 114. The space enclosed by the protruding side is used for epoxy resin potting insulation. After solidification, the whole assembly is as follows. Figure 1 As shown, the insulating groove is filled with epoxy resin, and multiple high-voltage electrodes 122 are connected together and uniformly connected to the output terminal of the high-voltage power supply 13. Low-voltage electrodes 123 are uniformly connected to the low-voltage port 132 of the power supply. Figure 4 As shown, the atomizing module 20 also includes a housing, inside which an atomizing unit and an airflow driving unit are disposed. The housing is open on the side near the plasma generation module. The bottom of the housing cavity of the atomizing unit is located at the bottom of the housing cavity of the atomizing unit, and the top of the housing cavity of the airflow driving unit is located at the top of the housing cavity of the atomizing unit. The top of the housing cavity is the water droplet atomization and wind-driven zone.

[0063] According to an embodiment of the present invention, in another aspect, a range hood is provided, including a smoke collection hood and an oil decomposition device of any of the above embodiments disposed within the smoke collection hood.

[0064] By integrating the aforementioned oil decomposition device into the range hood, the device operates during the self-cleaning mode, eliminating the need to disassemble the smoke collection hood for cleaning. This achieves automated maintenance, improves the user experience, reduces the use of chemical solvents, and aligns with environmental protection principles.

[0065] Based on the above embodiments, as a further defined implementation, the end of the hollow channel 120 of the medium pipe 121 near the atomizing module 20 is the inlet end, and the end away from the atomizing module 20 is the outlet end. The outlet end of the hollow channel 120 faces the duct and / or filter and / or impeller of the range hood. The outlet end of the medium pipe 121 faces the internal metal surface area of ​​the range hood's smoke collection hood, including the filter, duct, and impeller. After cleaning, the range hood's fan is started to rotate at high speed, and centrifugal force is used to detach the decomposed oil stains from the metal surface of the impeller.

[0066] According to an embodiment of the present invention, in another aspect, a control method suitable for the above-described range hood is provided, the control method comprising the following steps: Step S101: Obtain the operating time of the range hood; Step S102: Determine the working mode of the oil decomposition device based on the working time of the range hood; Step S103: According to the determined working mode of the oil decomposition device, control the oil decomposition device to work with the corresponding working parameters to decompose the oil in the fume hood. The operating parameters include the operating power of the plasma generating module 10 and the atomization amount of the atomization module 20.

[0067] In the above embodiment, the longer the range hood operates, the more severe the grease buildup. By dynamically selecting the operating mode of the grease decomposition device based on the range hood's operating time, and intelligently adjusting the operating power and atomization amount of the plasma generation module 10, adaptive cleaning is achieved, optimizing energy consumption and cleaning effect. For example, a low-power mode is used when there is light pollution to avoid over-cleaning and improve energy efficiency.

[0068] Based on the above embodiments, as a further limiting implementation method, such as... Figure 5 As shown, the oil stain decomposition device has three operating modes: low intensity, medium intensity, and high intensity. When the operating time T of the range hood is less than the first operating time T1, the oil stain decomposition device is controlled to start in low intensity mode, with the plasma generating module 10 operating at the first power and the atomizing module 20 operating at the first atomization amount. When T1 ≤ T < T2, the oil stain decomposition device is controlled to start in medium intensity mode, with the plasma generating module 10 operating at the second power and the atomizing module 20 operating at the second atomization amount. When T ≥ T2, the oil stain decomposition device is controlled to start in high intensity mode, with the plasma generating module 10 operating at the third power. The atomizing module 20 operates at a third atomization level; wherein, T1 < T2, first power < second power < third power, first atomization level < second atomization level < third atomization level, preferably, the rated power of the plasma generating module 10 is set to P0, the first power is between 20%P0 and 40%P0, the second power is between 50%P0 and 70%P0, and the third power is between 80%P0 and 70%P0; the rated atomization level is Q0, the first atomization level is between 10%Q0 and 20%Q0, the second atomization level is between 30%Q0 and 50%Q0, and the third atomization level is between 60%Q0 and 100%Q0.

[0069] In some embodiments, after the oil decomposition device completes the oil decomposition work, the following steps are also performed: Step S104: Control the range hood fan to rotate at high speed, so as to use centrifugal force to remove the decomposed oil stains from the fan impeller.

[0070] In the above embodiments, after the oil decomposition device completes the oil decomposition work, the fan is controlled to rotate at high speed, and centrifugal force is used to remove the oil from the impeller. This achieves thorough removal of oil, avoids residue, and improves overall cleanliness and equipment life.

[0071] In this embodiment, the working power of the plasma generating module 10 determines the concentration of the grease-decomposing factors (active substances). When there is only slight grease buildup, a low concentration of active substances is used, and the atomization carrier quantity is also at its lowest level, reducing standby energy consumption and avoiding over-cleaning. Therefore, the control method of the range hood provided in this embodiment selects the working mode of the grease decomposition device reasonably according to the working time of the range hood to achieve the optimal grease removal effect. The range hood adds an intelligent control system, integrating a grease timing sensor and a control unit. The system records the working time of the range hood in real time through the sensor. Based on the logic that the longer the working time, the more severe the grease buildup inside the range hood, the system dynamically adjusts the plasma generating module 10 and the atomization quantity according to the detection results, achieving adaptive control of the cleaning intensity. For example, when the grease buildup is severe, the power of the plasma generating module 10 and the droplet density of the atomization module 20 are automatically increased, while the cleaning intensity is reduced when there is only slight pollution, thereby achieving the optimal balance between cleaning efficiency and energy consumption. In addition, the intelligent control system can also set parameters such as cleaning cycle and cleaning time to achieve automated maintenance and improve user experience.

[0072] For example, an oil stain timing sensor (such as a current / timestamp-based timing chip) can be installed at the range hood motor drive module or duct inlet to record the continuous working time of the range hood (T, unit: minutes) in real time. The plasma generation module 10 has a rated power of approximately 60W and a rated operating voltage of 10KV. The atomizing device controls the density of the mist droplets and has three levels: low, medium, and high. The rated atomization rate is 30mg / h, and the corresponding operating modes are shown in the table below.

[0073] In the table above, T1 and T2 are preset parameters (default values: T1=30min, T2=120min), which users can customize through the range hood control panel.

[0074] Because range hoods accumulate large amounts of highly viscous grease over long-term use, making them difficult to clean, this invention provides a technology for in-situ activated droplet dielectric barrier discharge plasma to decompose grease. This technology utilizes the strong oxidizing substances generated by dielectric barrier discharge plasma, which, when encapsulated by micron-sized water droplets, become long-lived active substances. These substances can break the covalent bonds (such as CC and CH bonds) of organic matter in the grease, destroying the oil film and thus reducing the physical adsorption force of grease on the metal surface. This achieves efficient and rapid grease removal. Furthermore, the atomized plasma can introduce polar groups (such as hydroxyl-OH and carboxyl-COOH) onto the metal surface, increasing surface hydrophilicity and reducing the water contact angle. The hydrophilic surface reduces the wettability of the grease, further increasing the oil contact angle and weakening the adhesion between the grease and the metal surface, thus achieving efficient and rapid grease removal.

[0075] This invention introduces an intelligent control system that automatically adjusts the power and atomization amount of the dielectric barrier discharge plasma based on the degree of oil contamination, achieving dynamically optimized cleaning results. Furthermore, it innovatively combines dielectric barrier discharge plasma, airflow, and atomized water droplets, enabling the active materials of the dielectric barrier discharge plasma to dissolve in situ into the droplets, forming "activated droplets." The water mist airflow also facilitates convective heat dissipation from the dielectric barrier discharge plasma, reducing the risk of electrode breakdown (heat dissipation efficiency improved by over 50%). The airflow carries the activated droplets for long-distance diffusion, targeting specific oil-contaminated areas and improving cleaning precision. Throughout the process, the airflow simultaneously provides convective cooling, preventing electrode breakdown due to localized overheating and enhancing system stability and safety.

[0076] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. A plasma generating module, characterized in that, include: The bracket (11) has mounting holes (110). The electrode structure (12) includes a dielectric tube (121), a high-voltage electrode (122) and a low-voltage electrode (123), wherein the high-voltage electrode (122) and the low-voltage electrode (123) are arranged around the dielectric tube (121) at a predetermined distance; The electrode structure (12) is inserted into the mounting hole (110), and the bracket (11) is provided with a potting groove (111). The potting groove (111) is filled with insulating glue (115), and the insulating glue (115) is plastic-sealed outside the electrode structure (12). The dielectric tube (121) has a hollow channel (120) inside. The high-voltage electrode (122) and the low-voltage electrode (123) perform dielectric barrier discharge and generate plasma inside the dielectric tube (121).

2. The plasma generating module according to claim 1, characterized in that, The support (11) includes: The bracket body (112) is plate-shaped, and the mounting hole (110) is formed on the bracket body (112); A surrounding panel is fixedly installed on the outer periphery of the support body (112), and the surrounding panel and the support body (112) together enclose the glue-filling groove (111).

3. The plasma generating module according to claim 2, characterized in that, The enclosure is disposed on the outer periphery of the support body (112), the support body (112) having a first side and a second side disposed opposite to each other, and the enclosure includes: The first enclosure plate (113) is fixedly disposed on the outer periphery of the first side of the bracket body (112), and the first enclosure plate (113) and the first side side form a first glue-filling groove. The second enclosure plate (114) is fixedly installed on the outer periphery of the second side of the bracket body (112), and the second enclosure plate (114) and the second side side form a second glue-filling groove. The middle part of the electrode structure (12) is inserted into the mounting hole (110). The high voltage electrode (122) and the low voltage electrode (123) are distributed on both sides of the bracket body (112). One of the high voltage electrode (122) and the low voltage electrode (123) is located in the first glue-filling groove and the other is located in the second glue-filling groove.

4. The plasma generating module according to any one of claims 1 to 3, characterized in that, The bracket (11) is provided with a plurality of mounting holes (110) spaced apart. The electrode structure (12) has a plurality of holes, and the plurality of electrode structures (12) are inserted into the plurality of mounting holes (110) in a corresponding manner.

5. The plasma generating module according to claim 4, characterized in that, The plasma generating module (10) further includes: A high-voltage power supply (13) is provided, and the high-voltage electrodes (122) of the multiple electrode structures (12) are uniformly connected to the high-voltage port (131) of the high-voltage power supply (13). The low-voltage electrodes (123) of the multiple electrode structures (12) are uniformly connected to the low-voltage port (132) of the high-voltage power supply (13).

6. An oil pollution decomposition device, characterized in that, include: The plasma generating module (10) according to any one of claims 1 to 5 above; The atomizing module (20) can generate water mist, which forms active droplets with the plasma generated by the plasma generating module (10) to decompose oil stains.

7. The oil decomposition device according to claim 6, characterized in that, The atomizing module (20) includes: An atomizing unit adapted to convert water into water mist; An airflow drive unit is adapted to drive the water mist from one end of the hollow channel (120) of the medium pipe (121) to the other end, so as to decompose the oil stains in the set target cleaning area.

8. A range hood, characterized in that, It includes a fume hood and an oil decomposition device as described in claim 6 or 7, which is disposed within the fume hood.

9. A control method applicable to the range hood described in claim 8, characterized in that, The control method includes: Obtain the operating time of the range hood; The working mode of the oil decomposition device is determined based on the working time of the range hood. Based on the determined working mode of the oil decomposition device, control the oil decomposition device to operate with the corresponding working parameters to decompose the oil in the fume hood. The operating parameters include the operating power of the plasma generating module (10) and the atomization amount of the atomization module (20).

10. The control method for a range hood according to claim 9, characterized in that, After the oil decomposition device completes the oil decomposition work, the following steps are performed: Control the range hood's fan to rotate at high speed, using centrifugal force to remove the decomposed grease from the fan impeller.

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