Installation method of electrochemical deodorization module of sewage tank of built-in cleaning equipment

Abstract

The invention relates to the technical field of cleaning equipment and purification, in particular to a mounting method of an electrochemical deodorization module of a sewage tank of built-in cleaning equipment, which comprises the following steps: S1, an anode assembly and a cathode assembly for generating ozone are arranged in a reaction cavity, and a first cathode reaction plate and a second cathode reaction plate are positioned on two sides of the anode reaction plate; s2, the cover plate covers the first opening, and one end of the anode assembly and one end of the cathode assembly extend into the mounting cavity; s3, respectively connecting the anode assembly and the cathode assembly with the conductive assembly, and adding a sealing element into the mounting cavity; s4, the shell is connected to the bottom of the water tank through the cover plate and operates after being electrically connected. According to the installation method, rapid and accurate assembly can be achieved, the production efficiency is improved, meanwhile, sealing protection of electrical connection can be achieved, and therefore the durability and use safety of the deodorization module are improved.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment and purification technology, specifically a method for installing an electrochemical deodorization module for a built-in cleaning equipment wastewater tank. Background Technology

[0002] With the widespread use of smart cleaning equipment, residual organic matter in their wastewater tanks easily breeds bacteria and produces foul odors, seriously affecting user experience and indoor air quality. Currently common wastewater tank deodorization solutions, such as chemical deodorizers, cause secondary pollution; ultraviolet light deodorization has blind spots and lifespan issues; and adsorption filters cannot completely eliminate odors and require frequent replacement.

[0003] Ozone (O3), as a strong oxidant, can efficiently decompose organic matter and sterilize, ultimately reducing to oxygen without harmful residues, making it an ideal green deodorizer. Current integration solutions for electrochemical ozone modules in cleaning equipment offer room for continuous improvement in system reliability and ozone mass transfer efficiency, especially in applications requiring higher structural stability and better gas distribution. However, traditional corona-based ozone generators are typically large, energy-intensive, and rely on high-voltage power supplies, making them difficult to integrate into the space-constrained wastewater tanks of cleaning equipment. Therefore, there is an urgent need for a new integrated solution with higher integration, more robust connections, and the ability to achieve rapid and uniform diffusion of ozone in wastewater.

[0004] To address this, the present invention proposes an innovative structure and installation method for directly embedding and fixing an electrochemical ozone module into the bottom of a wastewater tank, in order to better adapt to diverse and long-term usage needs. Summary of the Invention

[0005] To address the aforementioned technical problems with existing wastewater tank deodorization technologies for cleaning equipment, such as the large size and high energy consumption of electrochemical ozone modules, reliance on high-voltage power supplies, and difficulty in integrating them into space-constrained wastewater tanks, the present invention provides the following technical solution: An installation method for an electrochemical deodorization module for a built-in cleaning device wastewater tank includes a housing, a first opening in the housing, a reaction chamber in the housing, a cover plate covering the first opening, an anode assembly and a cathode assembly for generating ozone, and an opening in the housing. The cover plate has an installation cavity, a conductive assembly connected to the anode assembly and the cathode assembly, and a sealing element for sealing the installation cavity. The anode assembly includes an anode reaction plate, and the cathode assembly includes a first cathode reaction plate and a second cathode reaction plate located on both sides of the anode reaction plate. The installation method for the deodorization module includes the following steps: S1. The anode assembly and cathode assembly for generating ozone are installed into the reaction chamber, with the first cathode reaction plate and the second cathode reaction plate located on both sides of the anode reaction plate. S2. A cover plate is placed over the first opening, and one end of the anode assembly and one end of the cathode assembly extend into the mounting cavity respectively; S3, the anode assembly and cathode assembly are respectively connected to the conductive assembly, and a sealing element is added to the mounting cavity; S4. The shell is connected to the bottom of the water tank via a cover plate and then electrically connected before operation.

[0006] Furthermore, in some embodiments of the present invention, step S1 further includes a pretreatment step S101, in which the surface of the reaction chamber is mirror polished and its surface roughness Ra≤0.8μm.

[0007] Furthermore, in some embodiments of the present invention, a connecting lug is provided between the end of the first cathode reaction plate and the end of the second cathode reaction plate.

[0008] Step S1 also includes a pretreatment step S102, and the first cathode reaction plate, the second cathode reaction plate, and the connecting ear are integrally formed.

[0009] Furthermore, in some embodiments of the present invention, in step S1, the anode assembly adopts one or more of the following: tin-antimony oxide coated titanium electrode, platinum-iridium alloy coated electrode, boron-doped diamond thin film electrode, and three-dimensional graphene foam electrode; and the cathode assembly adopts one or more of the following: stainless steel electrode, graphite plate, carbon felt, or surface-modified carbon cloth.

[0010] Furthermore, in some embodiments of the present invention, step S1 further includes a pretreatment step S103, wherein the cathode assembly is provided with a catalyst layer, and the catalyst layer is composite with a hydrophobic and breathable resin and is formed by secondary sintering.

[0011] Furthermore, in some embodiments of the present invention, the anode reaction plate is provided with an anode insert, the first cathode reaction plate is provided with a cathode insert, and the conductive component includes two conductive springs respectively connected to the anode insert and the cathode insert, and two conductive contacts connected to the conductive springs; In step S3, the conductive spring is first connected to the anode plate and the cathode plate respectively, and then the conductive contact is pressed onto the conductive spring.

[0012] Furthermore, in some embodiments of the present invention, the connecting ear is located on the side close to the cover plate, the connecting ear is located on a first connecting edge connected to the first cathode reaction plate, a second connecting edge connected to the second cathode reaction plate, and a third connecting edge connected between the first connecting edge and the second connecting edge, the cover plate is provided with a protrusion facing the first opening, and the protrusion is located on the side close to the anode insert; In step S2, the protrusion faces the anode insert so that the cover plate closes to the first opening.

[0013] Furthermore, in some embodiments of the present invention, the cross-section of the shell is rectangular, the opening includes a first grid and a second grid located on the side of the shell, and a third opening opposite to the first opening. The first grid and the second grid are arranged opposite to each other. The first cathode reaction plate and the second cathode reaction plate are each provided with a plurality of water-permeable holes evenly arranged. The width of the third opening is greater than the distance between the first cathode reaction plate and the second cathode reaction plate. In step S4, the third opening faces upward so that the housing is installed to the bottom of the water tank.

[0014] Furthermore, in some embodiments of the present invention, the cover plate is provided with a first mounting cavity connection hole for the anode insert to extend into the mounting cavity, a second mounting cavity connection hole for the cathode insert to extend into the mounting cavity, and a mounting cavity opening located in the mounting cavity. The anode insert is provided with an anode insert boss extending into the mounting cavity, the cathode insert is provided with a cathode insert boss extending into the mounting cavity, the mounting cavity is provided with a limiting part for engaging a conductive spring, and the sealing element is a sealant. In step S3, the sealant is injected and the gap between the first mounting cavity connection hole and the second mounting cavity connection hole is filled.

[0015] Furthermore, in some embodiments of the present invention, the reaction chamber is provided with a limiting groove, the limiting groove is provided with a first engaging groove for the anode reaction plate to extend into, a second engaging groove for the first cathode reaction plate to extend into, and a third engaging groove for the second cathode reaction plate to extend into. The distance between the anode reaction plate and the first cathode reaction plate is between 2mm and 5mm, and the distance between the anode reaction plate and the second cathode reaction plate is between 2mm and 5mm. In step S1, the anode reaction plate is placed first, followed by the first cathode reaction plate and the second cathode reaction plate.

[0016] The beneficial effects of this invention are as follows: The installation method of this invention facilitates rapid and accurate assembly, improving production efficiency, while also providing sealed protection for electrical connections, thereby enhancing the durability and safety of the deodorization module. By placing the first and second cathode reaction plates on either side of the anode reaction plate, this invention achieves double-sided electrolysis within a very small housing volume, increasing the effective reaction area per unit volume. By directly fixing the module to the bottom of the water tank, this invention utilizes the natural rising properties of ozone bubbles, allowing the generated ozone to penetrate the entire water body from bottom to top, achieving comprehensive contact and mixing of the wastewater. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electrochemical deodorization module of the present invention.

[0018] Figure 2 for Figure 1 AA sectional view.

[0019] Figure 3 This is an exploded view of the electrochemical deodorization module of the present invention.

[0020] Figure 4 This is an exploded view of the electrochemical deodorization module of the present invention from another angle.

[0021] Figure 5 for Figure 4 Enlarged view of part B.

[0022] Figure 6 This is an exploded view of the electrochemical deodorization module of the present invention from another angle.

[0023] Figure 7 This is an exploded view of the electrochemical deodorization module of the present invention from another angle.

[0024] Figure 8 This describes the relationship between concentration and time during the deodorization module's reaction process.

[0025] Explanation of reference numerals in the attached figures: 1. Housing; 2. Cover plate; 3. Anode assembly; 4. Cathode assembly; 5. Limiting groove; 6. Conductive assembly; 8. Sealing ring; 9. Seal; 11. Reaction chamber; 13. Opening; 15. First opening; 16. Cantilever fastening point; 20. Mounting cavity; 21. First mounting cavity connection hole; 22. Second mounting cavity connection hole; 23. Mounting cavity opening; 24. Protrusion; 25. Cantilever fastening groove; 26. Fixing lug; 28. Sealing groove; 29. ​​Extension column; 31. Anode reaction plate; 41. First cathode reaction plate. 42. Second cathode reaction plate; 43. Connecting lug; 44. Water permeable hole; 51. First engaging groove; 52. Second engaging groove; 53. Third engaging groove; 61. Conductive spring; 62. Conductive contact; 131. First grid; 132. Second grid; 133. Third opening; 201. Limiting part; 311. Anode insert; 411. Cathode insert; 431. First connecting edge; 432. Second connecting edge; 433. Third connecting edge; 3111. Anode insert boss; 4111. Cathode insert boss. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention, such as (up, down, left, right, front, back, etc.), are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0029] Example 1 like Figure 1 and Figure 2 , Figure 3 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning device wastewater tank includes a housing 1, a first opening 15 located in the housing 1, a reaction chamber 11 located in the housing 1, a cover plate 2 covering the first opening 15, an anode assembly 3 and a cathode assembly 4 for generating ozone, and an opening 13 located in the housing 1. The cover plate 2 is provided with an installation cavity 20, a conductive assembly 6 connected to the anode assembly 3 and the cathode assembly 4, and a sealing member 9 sealing the installation cavity 20. The anode assembly 3 includes an anode reaction plate 31, and the cathode assembly 4 includes a first cathode reaction plate 41 and a second cathode reaction plate 42 located on both sides of the anode reaction plate 31. The installation method for the deodorization module includes the following steps: S1. The anode assembly 3 and cathode assembly 4 for generating ozone are installed into the reaction chamber 11, with the first cathode reaction plate 41 and the second cathode reaction plate 42 located on both sides of the anode reaction plate 31. S2, cover plate 2 is placed over the first opening 15, one end of anode assembly 3 and one end of cathode assembly 4 respectively extend into mounting cavity 20; S3, anode assembly 3 and cathode assembly 4 are respectively connected to conductive assembly 6, and sealing element 9 is added to mounting cavity 20; S4. The shell 1 is connected to the bottom of the water tank via the cover plate 2 and then electrically connected before operation.

[0030] The installation method of this invention facilitates rapid and accurate assembly, improving production efficiency. It also provides sealed protection for electrical connections, thereby enhancing the durability and safety of the deodorization module. By assembling electrodes, closing the cover, sealing, and connecting in stages, this invention forms independent modular components. This not only simplifies the overall assembly process of the cleaning equipment and reduces production difficulty but also ensures product consistency and yield, facilitating later maintenance and replacement.

[0031] This invention achieves double-sided electrolysis within a very small housing volume by setting the first and second cathode reaction plates on both sides of the anode reaction plate. This increases the effective reaction area per unit volume and solves the problem that traditional corona treatment or ordinary electrochemical modules are bulky and difficult to integrate into the narrow bottom of the sewage tank of cleaning equipment such as floor scrubbers and sweeping robots. It also reduces the energy consumption per unit ozone production and does not require a high-voltage power supply, thus significantly improving space utilization.

[0032] This invention directly fixes the module to the bottom of the water tank, utilizing the natural rising properties of ozone bubbles to allow the generated ozone to penetrate the entire water body from bottom to top, achieving comprehensive contact and mixing of the wastewater. Compared to external access or top-addition methods, it eliminates diffusion dead zones, more quickly and efficiently decomposes organic matter deposited at the bottom and kills bacteria, eradicating odors at the source. Furthermore, the casing is securely connected to the bottom of the water tank via a cover plate and is electrically connected, allowing for direct operation. This eliminates the need for pipes and interfaces required for external ozone deodorization modules, enabling rapid generation and uniform diffusion of ozone in the wastewater. This efficiently decomposes organic matter and kills bacteria, ultimately reducing the ozone back to oxygen without harmful residues. It also avoids secondary pollution from chemical deodorizers and the frequent replacement of adsorption filters.

[0033] This invention achieves physical isolation between the reaction chamber and the electrical connection area by setting an independent mounting cavity on the cover plate to accommodate the conductive connection parts of the anode and cathode components, and injecting a sealing element for curing and sealing. This effectively prevents highly corrosive sewage or water vapor in the sewage tank from seeping into the circuit connection, avoids oxidation and corrosion of electrode contacts or short circuits, and extends the service life of the module in harsh sewage environments.

[0034] Optionally, in some embodiments, the power and control harness of the cleaning equipment is led out through a waterproof connector located on the side wall or bottom of the module and connected to a corresponding interface integrated into the wastewater tank wall. The harness does not need to move with any moving parts, which greatly improves reliability.

[0035] like Figure 2 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning device sewage tank includes a pretreatment step S101 in step S1, where the surface of the reaction chamber 11 is mirror polished to a surface roughness Ra≤0.8μm.

[0036] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, by mirror polishing the inner wall of the reaction chamber to a surface roughness Ra≤0.8μm, the coefficient of friction and surface energy of the chamber surface are reduced, forming a smooth and flat surface structure. Mirror polishing can reduce surface micropores and defects, reduce the corrosion rate of the electrolyte on the chamber material, and improve the chemical stability and structural reliability of the reaction chamber. The high-gloss surface can effectively destroy the adhesion conditions of dirt and bacteria, preventing suspended particles, organic residues, and bacteria in the sewage from adhering to the inner wall of the reaction chamber or forming a stubborn biofilm. When the cleaning equipment performs self-cleaning or emptys the sewage, the liquid in the reaction chamber can be quickly drained without any residual dead corners, greatly improving the self-cleaning performance of the module, reducing the risk of corrosion caused by residual sewage stagnation, thereby preventing the deodorization module itself from becoming a new source of pollution and odor, and ensuring the long-term cleanliness of the electrolytic reaction environment.

[0037] Specifically, the smooth surface of the reaction chamber significantly reduces fluid resistance and the adsorption force between bubbles and the wall. During the electrochemical reaction, the tiny ozone bubbles generated by the electrodes can rise more smoothly with the water flow and detach from the chamber, preventing bubbles from lingering, aggregating, or merging into large bubbles on the rough wall surface. This helps maintain ozone diffusion into the wastewater tank in the form of microbubbles, increasing the gas-liquid contact surface area, thereby improving the solubility and mass transfer efficiency of ozone in wastewater.

[0038] like Figure 5 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning device sewage tank is provided. A connecting ear 43 is provided between the end of the first cathode reaction plate 41 and the end of the second cathode reaction plate 42. Step S1 also includes a pretreatment step S102. The first cathode reaction plate 41, the second cathode reaction plate 42, and the connecting ear 43 are integrally formed.

[0039] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, by integrally molding the first cathode reaction plate, the second cathode reaction plate, and the connecting lug, physical and electrical connectivity between the two cathode reaction plates is achieved, eliminating the need for separate wiring for the two cathode plates. This not only reduces the number of conductive components and wiring complexity, but also, since there are no welded or screwed joints between the cathode reaction plates and the connecting lug, the current path is continuous, reducing contact resistance, energy loss, and performance degradation caused by corrosion or oxidation at the connection points. This ensures absolute potential balance between the two cathode reaction plates, thereby guaranteeing the uniformity of the electric field distribution on both sides of the anode and improving the stability and efficiency of ozone generation.

[0040] Specifically, the one-piece molded structure enhances the overall rigidity and mechanical strength of the cathode assembly. In scenarios involving frequent movement, vibration, and obstacle crossing during cleaning equipment operation, this structure effectively prevents electrode displacement or poor contact caused by loose connections between separate components. The connecting lugs, acting as reinforcing ribs, further ensure the relative position of the first and second cathode plates is fixed, guaranteeing a constant electrode spacing between the cathode and anode and avoiding short-circuit risks or electrolysis efficiency fluctuations caused by changes in electrode spacing.

[0041] Specifically, during the assembly process in step S1, the integrated structure combines two originally separate components into a single unit, simplifying the operation process. Operators no longer need to spend time calibrating the positions of the two independent cathode plates; they only need to install the integrated cathode assembly into the reaction chamber in one go. This not only reduces assembly steps but also lowers the assembly defect rate caused by scattered parts or misalignment, facilitating automated mass production.

[0042] like Figure 3 As shown, an installation method for an electrochemical deodorization module of a built-in cleaning equipment sewage tank is described. In step S1, the anode component 3 adopts one or more of the following: tin-antimony oxide coated titanium electrode, platinum-iridium alloy coated electrode, boron-doped diamond thin film electrode, and three-dimensional graphene foam electrode. The cathode component 4 adopts one or more of the following: stainless steel electrode, graphite plate, carbon felt, or surface-modified carbon cloth.

[0043] The anode component of this invention can effectively promote the oxidation reaction of six-electron water to generate ozone: 3H₂O → O₃ + 6H + +6e - The coating thickness is preferably 0.5-5 μm.

[0044] Specifically, the cathode assembly uses 316L stainless steel electrodes, graphite plates, carbon felt, or surface-modified carbon cloth. Its main function is to complete the circuit and initiate the hydrogen evolution reaction: 2H₂O + 2e⁻. - →H2+2OH - .

[0045] The tin-antimony oxide coating, platinum-iridium alloy coating, and boron-doped diamond used in the anode assembly of this invention are high oxygen evolution overpotential materials. Compared with ordinary electrodes, these materials can effectively suppress the side reaction of oxygen evolution during electrolysis, thereby increasing the proportion of current used to generate ozone. Specifically, the boron-doped diamond thin-film electrode, with its extremely wide electrochemical window, can generate a high concentration of hydroxyl radicals, further enhancing the ability to oxidize and decompose recalcitrant organic matter, and achieving high-concentration ozone output with low energy consumption.

[0046] The cathode assembly of this invention uses stainless steel electrodes, graphite plates, carbon felt, or surface-modified carbon cloth. These materials have good conductivity and hydrogen evolution catalytic performance, which can match the electrolysis reaction requirements of the anode assembly, promote the efficient hydrogen evolution reaction on the cathode side, maintain the potential balance of the electrode system, and ensure the stable and continuous ozone generation reaction.

[0047] The anode material selected in this invention possesses extremely strong chemical stability, making it less prone to electrode poisoning or coating peeling. Simultaneously, the stainless steel, graphite, or carbon-based materials used in the cathode assembly exhibit excellent corrosion resistance and electrical conductivity. This material combination effectively solves the problems of oxidation, corrosion, and passivation of the electrodes under prolonged contact with sewage and high current density operation, ensuring the performance stability of the deodorization module throughout the entire lifespan of the cleaning equipment and reducing maintenance frequency.

[0048] Optionally, in some embodiments, high specific surface area materials such as three-dimensional graphene foam or carbon felt can be used to increase the reactive sites and improve the reaction rate, while stainless steel or coated titanium electrodes can balance mechanical strength and cost-effectiveness.

[0049] Specifically, the effective reaction area of ​​the anode reaction plate 31 is equal to the effective reaction area of ​​the first cathode reaction plate 41, and the effective reaction area of ​​the anode reaction plate 31 is equal to the effective reaction area of ​​the second cathode reaction plate 42.

[0050] like Figure 3 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning equipment sewage tank includes a pretreatment step S103 in step S1, wherein the cathode assembly 4 is provided with a catalytic layer, and the catalytic layer is composite with a hydrophobic and breathable resin and is formed by secondary sintering.

[0051] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the hydrophobic and breathable resin in the catalyst layer forms a microporous structure after sintering, which can effectively block the permeation of liquid water while allowing gas to diffuse freely, thereby constructing a stable gas-liquid-solid three-phase reaction interface on the cathode surface, which is conducive to the oxygen reduction reaction and indirectly improves the overall current efficiency of anode ozone generation.

[0052] Specifically, by incorporating a hydrophobic and breathable resin into the cathode catalyst layer, the wetting properties of the electrode surface are altered. Its hydrophobic properties effectively reduce the adhesion of hydrogen bubbles generated during electrolysis to the electrode surface, prompting the bubbles to detach rapidly after forming micronuclei. This prevents a large number of bubbles from accumulating and covering the electrode surface to form a bubble shielding layer, thereby reducing ohmic resistance and reaction overpotential. This results in a higher current density at the same voltage, improving the system's electrolysis efficiency and energy-saving effect.

[0053] Specifically, the introduction of hydrophobic resin significantly reduces the surface energy of the cathode surface, making it difficult for calcium and magnesium ions in wastewater to form scale and for organic pollutants to deposit on the electrode surface due to physical adsorption. Even if a small amount of inorganic scale forms in the local high pH environment of the cathode, the scale layer is easily and automatically removed due to the non-stick properties of the hydrophobic surface and the scouring effect of bubble precipitation, effectively preventing electrode pore blockage and ensuring performance stability during long-term operation of the wastewater tank.

[0054] Specifically, a two-stage sintering molding process is adopted, which causes the hydrophobic resin to undergo melt rheology, forming a stable cross-linked network structure between the catalyst particles. This strengthens the bonding strength between the catalyst layer and the substrate, as well as the cohesive force of the catalyst layer itself. It effectively resists the scouring stress generated by strong bubble precipitation during electrolysis, solves the problem of easy powdering and peeling of traditional coated electrodes, and significantly extends the service life of the cathode assembly.

[0055] like Figure 5 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning equipment wastewater tank is described. The anode reaction plate 31 is provided with an anode insert 311, and the first cathode reaction plate 41 is provided with a cathode insert 411. The conductive component 6 includes two conductive springs 61 connected to the anode insert 311 and the cathode insert 411 respectively, and two conductive contacts 62 connected to the conductive springs 61. In step S3, the conductive springs 61 are first connected to the anode insert 311 and the cathode insert 411 respectively, and then the conductive contacts 62 are pressed onto the conductive springs 61.

[0056] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the conductive contact can extend outside the mounting cavity to interface with the main power supply. A conductive spring serves as an intermediate connecting medium, creating an elastic buffer mechanism between the anode / cathode insert and the external conductive contact. When the cleaning equipment generates high-frequency vibrations during operation or experiences impacts while crossing obstacles, the conductive spring effectively absorbs and buffers mechanical stress from all directions, preventing solder joint breakage, contact loosening, or momentary power outages caused by rigid connections.

[0057] Specifically, the conductive spring can automatically compensate for axial dimensional tolerances generated during the manufacturing process of the housing, cover plate, and electrode assembly. At the same time, when thermal expansion and contraction occur due to heat generation during operation or changes in ambient temperature, the spring's extension and contraction characteristics eliminate the internal stress caused by rigid constraints, preventing the brittle electrode substrate from cracking or deforming due to excessive force, thereby improving the module's yield and durability.

[0058] Specifically, step S3 employs an interference fit process where the conductive spring is installed first, followed by the conductive contact, replacing the cumbersome soldering or spot welding procedures. This not only avoids the risk of damage to the electrode coating or sealant that high-temperature welding may cause, but also avoids deformation of the insert or fatigue failure of the spring due to stress concentration during one-time assembly, simplifying the operation process and facilitating highly efficient automated assembly. Furthermore, applying a constant preload to the spring after contact fitting ensures that the insert and contact maintain a consistently low contact resistance and excellent conductivity.

[0059] like Figure 5 and Figure 7 As shown, an installation method for an electrochemical deodorization module for a built-in cleaning device wastewater tank is described. The connecting ear 43 is located on the side near the cover plate 2. The connecting ear 43 is located on a first connecting edge 431 connected to the first cathode reaction plate 41, a second connecting edge 432 connected to the second cathode reaction plate 42, and a third connecting edge 433 connected between the first connecting edge 431 and the second connecting edge 432. The cover plate 2 has a protrusion 24 facing the first opening 15. The protrusion 24 is located on the side near the anode insert 311. In step S2, the protrusion 24 faces the anode insert 311 so that the cover plate 2 covers the first opening 15.

[0060] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, during the cover plate closing process in step S2, the guiding effect of the protrusion toward the anode insert can quickly position the relative installation position of the cover plate and the housing, realizing the pre-alignment of the electrode assembly and the conductive assembly, and improving assembly efficiency and accuracy. At the same time, the spatial fit between the connecting ear and the protrusion can provide auxiliary restraint for the cathode assembly, reduce the displacement of the electrode assembly during the vibration of the cleaning equipment, ensure the stability of the electrode reaction, and further enhance the overall structural stability of the module.

[0061] Specifically, the connecting ears are arranged near the cover plate and form a C-shaped, U-shaped or frame-like support through a three-sided connecting structure.

[0062] Specifically, during the cover plate closing process in step S2, the protrusions constrain and press the position of the anode inserts, preventing the anode reaction plate from shifting vertically or wobbling horizontally. This ensures that the anode plate remains centered between the two cathode plates, thus maintaining a constant electrode spacing. Furthermore, the protrusions act as a foolproof mechanism. Specifically, the protrusions on the cover plate correspond to the positions of the anode inserts and act as a guide structure during the closing process, guiding the cover plate to accurately engage with the first opening of the housing, preventing misalignment of the electrode inserts and conductive components, and improving assembly accuracy and efficiency.

[0063] like Figure 1 and Figure 2 , Figure 3 As shown, an installation method for an electrochemical deodorization module of a built-in cleaning device for a sewage tank is disclosed. The housing 1 has a rectangular cross-section. The opening 13 includes a first grille 131 and a second grille 132 located on the side of the housing 1, and a third opening 133 opposite to the first opening 15. The first grille 131 and the second grille 132 are arranged opposite to each other. The first cathode reaction plate 41 and the second cathode reaction plate 42 are each provided with a plurality of evenly arranged water-permeable holes 44. The width of the third opening 133 is greater than the distance between the first cathode reaction plate 41 and the second cathode reaction plate 42. In step S4, the third opening 133 faces upward so that the housing 1 is installed to the bottom of the water tank.

[0064] This invention utilizes first and second grilles on the side of the casing as water inlets and a third upward-facing opening at the top as an air outlet. The buoyancy of ozone bubbles generated by electrolysis creates a miniature airlift circulation system. The grille structure prevents larger particles from directly impacting or adhering to the electrode surface, reducing the risk of electrode contamination and clogging, and extending the module's lifespan. Under gravity, wastewater from the bottom of the wastewater tank enters the reaction chamber through the side grilles and cathode permeable holes. It is then carried by the bubbles generated by electrolysis and overflows from the third opening at the top. This creates convection circulation in the surrounding water without the need for an additional water pump. This not only accelerates the uniform diffusion of ozone throughout the wastewater tank but also effectively agitates and decomposes solid dirt deposited at the bottom using the rising water flow, preventing odors from stagnant areas.

[0065] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, by designing the width of the third opening at the top to be greater than the distance between the first cathode reaction plate and the second cathode reaction plate, it is ensured that the open area at the top of the reaction chamber completely covers the gas-generating core area, eliminating the gas resistance phenomenon that is easily generated by traditional closed or small-hole structures. The generated microbubbles can be discharged directly into the water body without obstruction, avoiding the accumulation of bubbles at the top of the reaction chamber to form large air pockets that would crowd out the electrolyte space, thereby ensuring that the electrode is always completely immersed in the sewage, maintaining a stable current density and continuous ozone production.

[0066] Specifically, the multiple perforated holes evenly distributed on the cathode reaction plate reduce the fluid resistance of wastewater entering the gap between the plates. These perforated holes allow external wastewater to enter not only through the side grille but also directly penetrate the cathode plate to replenish the reaction core area on the anode surface. This water intake method improves mass transfer efficiency, ensuring that organic pollutants can be quickly replenished to the electrode surface for oxidation and decomposition, while also facilitating the rapid dissipation of generated heat with the water flow, preventing localized overheating.

[0067] like Figure 3 , Figure 5 and Figure 7As shown, an installation method for an electrochemical deodorization module of a built-in cleaning equipment sewage tank is described. The cover plate 2 is provided with a first mounting cavity connection hole 21 for the anode insert 311 to extend into the mounting cavity 20, a second mounting cavity connection hole 22 for the cathode insert 411 to extend into the mounting cavity 20, and a mounting cavity opening 23 located in the mounting cavity 20. The anode insert 311 is provided with an anode insert boss 3111 extending into the mounting cavity 20, and the cathode insert 411 is provided with a cathode insert boss 4111 extending into the mounting cavity 20. The mounting cavity 20 is provided with a limiting part 201 for engaging a conductive spring 61. The sealing member 9 is a sealant. In step S3, the sealing member 9 is injected and the gap between the first mounting cavity connection hole 21 and the second mounting cavity connection hole 22 is sealed.

[0068] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, by injecting sealant into the mounting cavity in step S3, the potting process effectively cuts off the path of wastewater in the reaction chamber to the electrical connection point via capillary action along the surface of the electrode inserts. After the sealant cures, complete isolation between the reaction side and the electrical side is achieved, eliminating the risk of short circuits or electrochemical corrosion of contacts caused by seal failure, and ensuring the absolute safety of the equipment under long-term water immersion conditions.

[0069] Specifically, the design of the anode and cathode insert bosses serves as an axial limiting element during assembly. When the electrode assembly is inserted into the mounting cavity, the bosses act as mechanical stops, precisely controlling the insertion depth and preventing over-insertion or slippage due to gravity. This not only ensures consistent electrode plate height within the reaction chamber but also provides a stable reference surface for subsequent potting processes, preventing sealant curing position deviations caused by electrode displacement.

[0070] Specifically, the limiting part provides radial constraint for the conductive spring, preventing lateral bending or displacement of the spring during pressing or operation. Simultaneously, after the potting compound in step S3 cures, it fuses the electrode inserts, insert bosses, and part of the housing structure into one unit, serving as a structural anchor. This allows the entire electrical connection assembly to withstand the high-intensity vibrations of the cleaning equipment without loosening, enhancing the overall structural rigidity and fatigue resistance of the module.

[0071] like Figure 2 and Figure 3As shown, an installation method for an electrochemical deodorization module of a built-in cleaning equipment sewage tank is described. The reaction chamber 11 is provided with a limiting groove 5. The limiting groove 5 is provided with a first engaging groove 51 for the anode reaction plate 31 to extend into, a second engaging groove 52 for the first cathode reaction plate 41 to extend into, and a third engaging groove 53 for the second cathode reaction plate 42 to extend into. The distance between the anode reaction plate 31 and the first cathode reaction plate 41 is between 2mm and 5mm, and the distance between the anode reaction plate 31 and the second cathode reaction plate 42 is between 2mm and 5mm. In step S1, the anode reaction plate 31 is placed in first, and then the first cathode reaction plate 41 and the second cathode reaction plate 42 are placed in simultaneously.

[0072] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the present invention strictly controls the electrode spacing between the anode and cathode within the range of 2mm-5mm, achieving an optimal balance between electrochemical reaction efficiency and hydrodynamics. On the one hand, this distance effectively reduces the ohmic voltage drop caused by solution resistance, enabling sufficient current density to be obtained under low voltage drive, thus reducing overall energy consumption.

[0073] On the other hand, the 2mm-5mm range ensures a sufficiently strong electric field to generate ozone efficiently, while avoiding short circuits or bubble blockages caused by too small a spacing, thus ensuring smooth wastewater flow and continuous ozone production.

[0074] Specifically, by setting a first locking groove, a second locking groove, and a third locking groove within the reaction chamber, precise positioning and physical constraint of the anode and cathode plates are achieved. This ensures that the three plates remain strictly parallel after assembly, avoiding uneven current distribution caused by skewness or misalignment, thus guaranteeing the uniformity of the electric field distribution between the plates. This not only prevents accelerated wear of the electrode coating due to excessive local current density but also effectively prevents short-circuit faults caused by plate displacement or contact under severe vibration conditions, significantly improving the structural stability of the module.

[0075] The connecting ear of this application is located between the first cathode reaction plate and the second cathode reaction plate, and on the side close to the cover plate, that is, the connecting ear is located at the first opening. If the cathode assembly is installed first, the connecting ear will block the installation of the anode reaction plate. Therefore, the anode reaction plate needs to be placed first, and then the first cathode reaction plate and the second cathode reaction plate containing the connecting ear are placed at the same time.

[0076] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the cover plate is provided with a fixing lug 26 connected to the water tank, an extension post 29 extending away from the housing 1, a sealing groove 28 located in the extension post 29, and a sealing ring 8 located in the sealing groove 28.

[0077] Specifically, the deodorization module adopts a flat, disc-shaped or box-shaped structure to minimize height occupation and fits snugly against the bottom of the sewage tank. Its integration methods include, but are not limited to, one or more of the following: snap-fit ​​fixing, threaded connection, magnetic fixing, and adhesive fixing.

[0078] Specifically, the outer edge of the shell is provided with a buckle, which cooperates with the pre-set buckle groove at the bottom of the sewage tank to lock and fix it.

[0079] like Figure 4 As shown, specifically, the fixing lugs of the shell are connected and fixed from the outside of the sewage tank through the tank wall and into the threaded holes of the fixing lugs by waterproof screws.

[0080] Specifically, permanent magnets or magnetic materials are embedded at the bottom of the module at the corresponding positions on the bottom of the sewage tank, and fixed by magnetic adsorption.

[0081] Specifically, a high-strength waterproof adhesive can be used to bond the module to the bottom of the sewage tank.

[0082] Optionally, in some embodiments, the housing is integrally molded from high-strength, corrosion-resistant engineering plastics (such as reinforced PP or PVDF), with an open top surface or dense permeable grids on the sides to ensure full contact between sewage and electrodes while preventing large particles of debris from clogging it.

[0083] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the cover plate is provided with fixing ears for connecting to the water tank, which can securely fix the deodorization module to the bottom of the sewage tank and prevent displacement or loosening due to vibration or water flow impact during operation.

[0084] Specifically, the cover plate is equipped with a sealing groove and a sealing ring is installed in the sealing groove. This can form a reliable liquid-tight and air-tight barrier at the joint surface between the module and the bottom of the water tank, effectively preventing sewage or moisture from moving from the lower side of the sealing groove to the opening of the installation cavity and seeping into the installation cavity and electrical connection parts. This avoids the risks of short circuits, corrosion and ozone leakage, and improves the operational safety and durability of the module in humid environments.

[0085] Alternatively, in some embodiments, the sealing ring may be a silicone ring or a rubber gasket.

[0086] Specifically, the air outlet direction of the third opening is perpendicular to the water inlet direction of the first and second grilles, forming a cross-shaped flow channel layout. This facilitates the full agitation of sewage in the reaction chamber and uniform contact with the electrode surface. At the same time, it promotes the rapid discharge of bubbles, including undissolved ozone or reaction-generated gases, in the vertical direction, reducing air resistance, improving ozone utilization efficiency and sewage treatment effect, reducing airflow disturbance to water flow, avoiding bubble retention or short-circuiting, promoting the full dissolution and reaction of ozone in sewage, and improving ozone utilization and deodorization efficiency.

[0087] Specifically, the electrochemical deodorization module is used for sterilization and cleaning of the wastewater tank of a built-in cleaning device.

[0088] Example 2 Based on Example 1, Example 2 also has the following implementation method: During assembly, first, embed the sealing ring into the sealing groove of the cover plate, ensuring the sealing ring is flat and in place without twisting. Then, install the electrode assemblies, oriented the anode and cathode assemblies according to the pre-set limiting grooves inside the housing. The protrusions of the cover plate and the connecting ears, and the connecting ears and the limiting grooves, cooperate to form an anti-misinsertion structure, effectively preventing reversed electrode polarity. Next, install the cover plate, aligning the cantilever locking groove 25 of the cover plate with the cantilever locking point 16 of the housing, applying appropriate pressure until it is locked in place, forming a mechanical interlock. After completing the mechanical assembly, connect the two conductive springs to the anode and cathode inserts respectively, and then press the conductive contacts onto the upper ends of the conductive springs to establish a reliable electrical connection path. Finally, inject special sealant at the wire harness lead-out points. After potting and curing, a complete environmental sealing system is formed at the interface, ensuring long-term sealing safety and electrical insulation reliability of the device under humid conditions in the sewage tank.

[0089] When the cleaning equipment is charging or operating, a rated DC voltage (e.g., 12VDC) is applied to the deodorization module fixed at the bottom of the tank. Ozone is preferentially generated through a water oxidation reaction on the anode surface, while hydrogen is released at the cathode. The generated ozone microbubbles are directly produced from the bottom of the wastewater tank and rise slowly. During this process, they fully contact and dissolve the wastewater, non-selectively oxidizing and decomposing the organic sludge at the bottom and odor molecules throughout the tank, while also killing bacteria in the water. Hydrogen also rises and escapes in the form of microbubbles; it does not participate in deodorization but provides some stirring.

[0090] This invention provides an electrochemical ozone deodorization module with higher integration, more stable connection, and better ozone diffusion. The module is directly fixed to the bottom of the wastewater tank and generates ozone in situ at the bottom layer of the tank through low-voltage electrochemical methods. The ozone is then fully mixed with the wastewater through the natural rising of the bubbles, thereby achieving more efficient and uniform removal of odors and bacteria from the wastewater tank.

[0091] Specifically, the deodorization module is a fixed component built into the bottom of the wastewater tank, with no moving connecting parts. This completely avoids problems such as interface wear, wiring fatigue, and sealing failure caused by frequent opening and closing of the tank lid, significantly improving integration and reliability. The built-in design and compact structure allow for compatibility with wastewater tanks of various cleaning equipment such as floor scrubbers and robotic vacuum cleaners via mounting ears, without occupying external space. The same module simultaneously addresses both odor and microbial issues, eliminating the need for additional deodorization and sterilization devices.

[0092] Specifically, ozone is generated from the bottom of the tank and rises naturally in the form of bubbles. Its movement path covers the entire wastewater tank, avoiding the problem of insufficient concentration at the bottom that may occur with top release. This allows ozone to come into more full contact with pollutants, react more thoroughly, and be utilized more efficiently.

[0093] Specifically, the deodorization module acts directly on the bottom area of ​​the tank where pollutants are easily deposited, and has a stronger ability to decompose and eliminate heavily polluted areas such as sludge and bacterial film, thus more effectively suppressing odor generation from the source.

[0094] Specifically, the deodorization module and the sewage tank are installed in an integrated design, which simplifies maintenance and avoids damage to the module caused by accidental contact by users.

[0095] Specifically, ozone decomposes naturally into oxygen after the reaction (O3→O2, half-life of about 20-30 minutes), leaving no chemical residue and avoiding secondary pollution. Actual testing showed that the bottom-installed deodorizing module in 500ml of tap water could maintain a stable dissolved ozone concentration of 20ppm within 30 minutes, ensuring excellent deodorizing and sterilizing performance.

[0096] Example 3 Based on Example 1, Example 3 also has the following implementation method: The electrochemical ozone module of this invention is specifically designed for fixed installation at the bottom of the wastewater tank of cleaning equipment, forming part of the wastewater tank body, thereby achieving a higher degree of integration and connection reliability.

[0097] The anode is preferably a tin-antimony oxide coated titanium electrode (SnO2-Sb / Ti), a platinum-iridium alloy coated electrode (Pt-Ir / Ti), a boron-doped diamond (BDD) thin film electrode, or a three-dimensional graphene foam electrode, which is used to efficiently promote the ozone generation reaction of six electron transfer at a lower potential.

[0098] The cathode can be made of 316L stainless steel, graphite plate, carbon felt, or surface-modified carbon cloth. A stable gas-liquid-solid three-phase reaction interface is formed by incorporating a hydrophobic and permeable resin into the catalyst layer and then sintering it twice. This effectively suppresses hydrogen evolution side reactions and improves the selectivity of ozone generation. The distance between the anode and cathode is controlled between 2mm and 5mm. By adjusting the electrode distance and the ion concentration in the wastewater, it can adapt to different water quality conditions, achieving flexible control of ozone production and long-term stable operation of the device.

[0099] Specifically, the surface modification treatment involves using physical vapor deposition (PVD) technology to construct a functional coating on the cathode surface.

[0100] Optionally, the method for preparing surface-modified carbon cloth includes the following steps: T1. The cut commercial carbon cloth is ultrasonically cleaned with acetone, ethanol and water in sequence to remove residual organic matter, oil and impurities from the production process. After rinsing repeatedly with deionized water, it is dried in an oven at 60-80℃, then activated by immersion in a 3mol / L nitric acid solution and treated at 60-80℃ for 1-2 hours to enhance its hydrophilicity and bonding with the catalyst layer.

[0101] T2. Mix the catalyst powder, conductive agent and dispersant, and ball mill in a planetary ball mill or high-speed homogenizer for 2-4 hours to form a uniform primary dispersion. Slowly add the hydrophobic binder and continue stirring at low speed to form a slurry.

[0102] MnO2 and carbon-supported platinum are mixed in a mass ratio of 3:1 to form a catalyst. By mass, there are 40-60 parts of catalyst, 20-30 parts of conductive agent, 20-30 parts of hydrophobic binder, and 10-20 parts of dispersant. The conductive agent is acetylene black, the hydrophobic binder is polytetrafluoroethylene emulsion with a solid content of 60%, and the dispersant is isopropanol.

[0103] T3. Apply the slurry from step T2 evenly to the surface of the pretreated carbon cloth and dry it to remove all solvents. The slurry thickness is 50-200 micrometers and the area loading is 2-5 mg / cm².

[0104] Place the dried electrodes in a temperature-controlled furnace. In an air or nitrogen atmosphere, heat to 340-360°C at a rate of 2-5°C / min, and hold at this temperature for 30-60 minutes.

[0105] At a temperature of 340-360℃, slightly higher than the melting point of polytetrafluoroethylene (PTFE), PTFE particles melt, fibrousize, and form a three-dimensional hydrophobic network, while simultaneously binding and fixing the catalyst and conductive agent particles.

[0106] T4. Using a platinum target, a metal layer is deposited on the surface by sputtering in an argon atmosphere. The power is 50-200W, the working pressure is 0.5-2Pa, the deposition time is 5-20 minutes, and the film thickness is 5-100nm. The sample is then subjected to low-temperature in-situ annealing under vacuum or an inert atmosphere, with the temperature controlled at 150-200℃ and held for 30 minutes to promote atomic diffusion between the PVD film and the substrate and improve adhesion.

[0107] T5. Place the cooled electrode back into the programmed temperature-controlled furnace. Under nitrogen protection, heat to 280-320℃ at a rate of 2-5℃ / min and hold for 30-45 minutes. The temperature of 280-320℃ is lower than the main decomposition temperature of PTFE to promote interfacial fusion. Specifically, by eliminating the thermal stress introduced by the physical vapor deposition process, it promotes the bonding between the PVD ultrathin layer and the underlying catalyst layer at the interface, improves adhesion and stabilizes the PTFE network, optimizes the pore structure, and ultimately achieves the best balance between hydrophobicity, air permeability, and mechanical strength.

[0108] When the module is in operation, ozone microbubbles are generated directly from the bottom of the tank and rise naturally. During this process, they fully mix and come into contact with the wastewater, rapidly dissolving and diffusing to oxidize and decompose organic matter and inactivate microorganisms. The module has a self-monitoring function, which detects changes in internal resistance to determine the liquid level and operating status in real time, preventing dry burning.

[0109] The system supports constant voltage or constant current power supply modes, adapting to the electrical configurations of different cleaning equipment. To maintain long-term efficient operation, wastewater undergoes pre-filtration or softening treatment to reduce scale accumulation on the electrode surface.

[0110] Example 4 Based on Example 3, Example 4 also has the following implementation method: An electrochemical deodorization module for a built-in cleaning device wastewater tank includes a housing 1, a first opening 15 located in the housing 1, a reaction chamber 11 located in the housing 1, a cover plate 2 covering the first opening 15, an anode assembly 3 and a cathode assembly 4 for generating ozone, and an opening 13 located in the housing 1. The cover plate 2 is provided with a mounting cavity 20, a conductive assembly 6 connected to the anode assembly 3 and the cathode assembly 4, and a sealing element 9 sealing the mounting cavity 20. The anode assembly 3 includes an anode reaction plate 31, and the cathode assembly 4 includes a first cathode reaction plate 41 and a second cathode reaction plate 42 located on both sides of the anode reaction plate 31. The surface of reaction chamber 11 is mirror polished, and its surface roughness Ra≤0.8μm.

[0111] A connecting lug 43 is provided between the end of the first cathode reaction plate 41 and the end of the second cathode reaction plate 42. The first cathode reaction plate 41, the second cathode reaction plate 42, and the connecting ear 43 are integrally formed.

[0112] The anode reaction plate 31 is provided with an anode insert 311, the first cathode reaction plate 41 is provided with a cathode insert 411, and the conductive component 6 includes two conductive springs 61 respectively connected to the anode insert 311 and the cathode insert 411, and two conductive contacts 62 connected to the conductive springs 61. The connecting ear 43 is located on the side close to the cover plate 2. The connecting ear 43 is located on a third connecting edge 433, which includes a first connecting edge 431 connected to the first cathode reaction plate 41, a second connecting edge 432 connected to the second cathode reaction plate 42, and a third connecting edge 433 connected between the first connecting edge 431 and the second connecting edge 432. The cover plate 2 is provided with a protrusion 24 facing the first opening 15. The protrusion 24 is located on the side close to the anode insert 311. The shell 1 has a rectangular cross-section. The opening 13 includes a first grille 131 and a second grille 132 located on the side of the shell 1, and a third opening 133 opposite to the first opening 15. The first grille 131 and the second grille 132 are arranged opposite to each other. The first cathode reaction plate 41 and the second cathode reaction plate 42 are each provided with a plurality of water-permeable holes 44 evenly arranged. The width of the third opening 133 is greater than the distance between the first cathode reaction plate 41 and the second cathode reaction plate 42. The cover plate 2 is provided with a first mounting cavity connection hole 21 for the anode insert 311 to extend into the mounting cavity 20, a second mounting cavity connection hole 22 for the cathode insert 411 to extend into the mounting cavity 20, and a mounting cavity opening 23 located in the mounting cavity 20. The anode insert 311 is provided with an anode insert boss 3111 extending into the mounting cavity 20, the cathode insert 411 is provided with a cathode insert boss 4111 extending into the mounting cavity 20, the mounting cavity 20 is provided with a limiting part 201 for engaging the conductive spring 61, and the sealing element 9 is a sealant. The reaction chamber 11 is provided with a limiting groove 5. The limiting groove 5 is provided with a first engaging groove 51 for the anode reaction plate 31 to extend into, a second engaging groove 52 for the first cathode reaction plate 41 to extend into, and a third engaging groove 53 for the second cathode reaction plate 42 to extend into. The distance between the anode reaction plate 31 and the first cathode reaction plate 41 is between 2mm and 5mm, and the distance between the anode reaction plate 31 and the second cathode reaction plate 42 is between 2mm and 5mm. An installation method for an electrochemical deodorization module in a built-in cleaning device's wastewater tank includes the following steps: In the pretreatment step S101, the surface of the reaction chamber 11 is mirror polished, and its surface roughness Ra≤0.8μm; Pretreatment step S102, the first cathode reaction plate 41, the second cathode reaction plate 42, and the connecting lug 43 are integrally formed; Pretreatment step S103: The cathode assembly 4 is provided with a catalyst layer, in which a hydrophobic and breathable resin is composited and formed by secondary sintering. S1. The anode assembly 3 and cathode assembly 4 for generating ozone are installed into the reaction chamber 11. The first cathode reaction plate 41 and the second cathode reaction plate 42 are located on both sides of the anode reaction plate 31. The anode reaction plate 31 is placed first, and then the first cathode reaction plate 41 and the second cathode reaction plate 42 are placed simultaneously. The anode assembly 3 is a boron-doped diamond thin film electrode, and the cathode assembly 4 is a carbon cloth with surface modification treatment. S2, the cover plate 2 is placed over the first opening 15, one end of the anode assembly 3 and one end of the cathode assembly 4 respectively extend into the mounting cavity 20; the protrusion 24 faces the anode insert 311 so that the cover plate 2 closes to the first opening 15. S3, anode assembly 3 and cathode assembly 4 are respectively connected to conductive assembly 6, and sealing member 9 is added to mounting cavity 20; firstly, conductive spring 61 is connected to anode insert 311 and cathode insert 411 respectively, and then conductive contact 62 is pressed onto conductive spring 61; sealing member 9 is injected and the gap between first mounting cavity connection hole 21 and second mounting cavity connection hole 22 is sealed. S4. The housing 1 is connected to the bottom of the water tank via the cover plate 2 and is electrically connected before operation; the third opening 133 faces upward so that the housing 1 can be installed at the bottom of the water tank.

[0113] The shell 1 is integrally molded from polyvinylidene fluoride using an injection molding process, with a surface roughness Ra of 0.6 μm.

[0114] The anode material is a boron-doped diamond thin film electrode, and the cathode material is carbon cloth with surface modification treatment by physical vapor deposition. The cathode is formed by composite hydrophobic and breathable resin in the catalyst layer and then sintering it twice.

[0115] A method for preparing surface-modified carbon cloth includes the following steps: T1. Clean the cut commercial carbon cloth with acetone, ethanol and water in sequence using ultrasonic cleaning, rinse repeatedly with deionized water, dry in an oven at 80°C, and immerse in a 3mol / L nitric acid solution at 80°C for 2 hours. T2. Mix MnO2 and carbon-supported platinum to form a catalyst. The mass ratio of MnO2 to carbon-supported platinum is 3:1. By mass, there are 50 parts of catalyst, 20 parts of conductive agent, 30 parts of hydrophobic binder, and 20 parts of dispersant. The conductive agent is acetylene black, the hydrophobic binder is polytetrafluoroethylene emulsion with a solid content of 60%, and the dispersant is isopropanol.

[0116] The catalyst powder, conductive agent and dispersant are mixed and ball-milled in a planetary ball mill or high-speed homogenizer for 2 hours. The hydrophobic binder is slowly added and the mixture is stirred at low speed for 30 minutes to form a slurry.

[0117] T3. Apply the slurry from step T2 evenly to the surface of the pretreated carbon cloth and dry it at 60°C. The slurry thickness is 50-200 micrometers and the area loading is 2-5 mg / cm².

[0118] The dried electrodes were placed in a temperature-controlled furnace. Under a nitrogen atmosphere, the temperature was increased to 350°C at a rate of 5°C / min and held at this temperature for 60 minutes.

[0119] T4. Using a platinum target, a metal layer was deposited on the surface by sputtering in an argon atmosphere. The power was 80W, the working pressure was 0.5Pa, the deposition time was 15 minutes, and the film thickness was 20nm. The sample was then subjected to low-temperature in-situ annealing in a nitrogen inert atmosphere, with the temperature controlled at 150℃ and held for 30 minutes.

[0120] T5. Place the cooled electrode back into the programmed temperature-controlled furnace. Under nitrogen protection, heat to 300℃ at 5℃ / min, hold for 45 minutes, and then cool to obtain the surface-modified carbon cloth.

[0121] sp of boron-doped diamond electrodes 3 Hybridized diamond electrodes exhibit extremely high chemical inertness, with an oxygen evolution overpotential as high as 2.0-2.5V, significantly higher than that of tin-antimony oxide-coated titanium electrodes (1.2-1.5V), platinum-iridium alloy-coated electrodes (1.0-1.2V), and three-dimensional graphene foam electrodes (1.1-1.3V). In the electrolytic reaction for ozone generation, this high oxygen evolution overpotential effectively suppresses side reactions and prevents electrode surface degradation due to oxidation and dissolution. Boron-doped diamond electrodes lack active functional groups on their surface, relying primarily on holes introduced by boron doping as active sites for the electrolytic reaction, resulting in extremely high catalytic selectivity and the ability to directionally promote ozone generation through water electrolysis. They also exhibit high current efficiency in ozone generation. In contrast, tin-antimony oxide-coated titanium electrodes are prone to antimony ion dissolution during long-term electrolysis and are susceptible to chloride ion interference from wastewater, leading to hypochlorite formation. Platinum-iridium alloy electrodes suffer from precious metal dissolution and loss, are more prone to oxygen evolution reactions, and have low ozone generation efficiency. Three-dimensional graphene foam electrodes are prone to conductivity decay due to interlayer structure damage, and their numerous surface defects and complex side reactions result in low current efficiency.

[0122] In the preferred embodiment three, the actual performance of the ozone electrochemical deodorization module was tested. The ozone generator was powered by 12V, with the anode and cathode areas being the same size, and the electrode spacing being 3mm. The ozone electrochemical deodorization module was installed at the bottom of the test container.

[0123] Table 1. Test parameters of the ozone electrochemical deodorization module

[0124] As shown in Table 1, the electrochemical deodorization module for the wastewater tank of the built-in cleaning equipment was selected for testing. Tap water with pH=7.2, total dissolved solids (TDS)=150ppm, and total dissolved chlorine (THCl)=0.6mg / L was placed in a 500mL test container. The cathode was connected to the negative terminal of an external power supply, and the anode to the positive terminal, powered by a 12V DC voltage. After the reaction lasted for 30 minutes, a water sample was taken, and the dissolved ozone concentration was determined using the sodium indigo disulfonate (IDS) spectrophotometric method. The results showed that after 30 minutes of reaction, the ozone concentration in the water reached 20ppm, proving that the electrochemical deodorization module can effectively generate ozone-active substances with strong oxidizing properties. This concentration fully meets the practical requirements for the decomposition of organic matter and the inactivation of microorganisms in the wastewater tank, highlighting the excellent performance of this ozone generator in deodorization and sterilization.

[0125] Experiments have shown that, under 12V DC power supply and 3mm electrode spacing, the device can achieve a dissolved ozone concentration of 20ppm in 500ml of static water within 30 minutes, effectively meeting the deodorization and sterilization requirements of the sewage tank.

[0126] Example 5 Example 5, based on Example 1, also has the following implementation method: Test on the killing effect of ozone deodorization module on microorganisms in water Test objective: To verify the actual sterilization efficiency of the ozone deodorization module described in this invention in a sewage tank environment.

[0127] Test environment: The test was conducted under standard laboratory conditions, using a 500mL container to hold the water sample, and the water temperature was maintained at 25±2℃.

[0128] Tested bacterial species: Escherichia coli and Staphylococcus aureus, as representatives of common pathogens in water bodies.

[0129] Test method: Conducted according to the microbial inactivation test specifications. The prepared bacterial suspension was added to the test water sample to stabilize the initial bacterial count at approximately 5 × 10⁻⁶. 5 The ozone deodorization module was then activated to bring the ozone concentration in the water up to and maintain at 20 ppm.

[0130] Test Procedure and Results: Under the condition of maintaining an ozone concentration of 20 ppm, samples were taken after different exposure times (0 s, 5 s, 15 s, 30 s) to detect the number of surviving bacterial colonies in the water and calculate the kill rate. Specific results are shown in the table below: Table 2. Test results of ozone's effectiveness against Escherichia coli and Staphylococcus aureus in water.

[0131] As shown in Table 2, the test results demonstrate that the deodorization module of this invention exhibits extremely rapid and thorough elimination of common pathogenic bacteria in water at a concentration of 20 ppm. Escherichia coli was completely killed within 5 seconds (100% kill rate), and Staphylococcus aureus was killed at a rate exceeding 99.998% within 5 seconds, achieving complete elimination within 15 seconds. These results fully demonstrate that the device of this invention, when integrated into a sewage tank system, can achieve highly efficient and rapid elimination of microorganisms in water, thereby effectively solving the problems of microbial contamination and odor in sewage tanks.

[0132] This invention successfully developed and verified a novel electrochemical ozone deodorization module that can be integrated into the sewage tank of cleaning equipment. Its core lies in using an anode material with a high oxygen evolution potential to promote the six-electron water oxidation reaction pathway. Through optimized electrode structure and gas-liquid mass transfer design, in-situ, controllable generation and efficient utilization of ozone are achieved in the sewage tank operating environment.

[0133] Example 6 The difference between Example 6 and Example 4 is that the shell is made of polypropylene in one piece with a surface roughness Ra of 0.9 μm. Under 12V power supply and 3mm electrode spacing, this device can achieve an ozone concentration of 17 ppm in 500ml of static wastewater within 30 minutes.

[0134] Polyvinylidene fluoride (PVDF) has low surface energy and almost no ozone adsorption. Ozone can be entirely used to react with organic matter in wastewater or dissolve in the water. However, ordinary polypropylene has a higher surface polarity than PVDF, which physically adsorbs some ozone molecules, leading to a reduction in the effective amount of ozone dissolved in wastewater. Furthermore, rough surfaces act as nucleation sites for ozone bubbles, causing them to coalesce and enlarge, reducing the gas-liquid contact area and lowering ozone dissolution efficiency. In static wastewater, rough surfaces increase local fluid resistance, hindering ozone diffusion and convection, ultimately resulting in a decrease in the final detectable concentration.

[0135] Example 7 The difference between Example 7 and Example 4 is that the cathode uses commercially available carbon cloth. Under 12V power supply and a 3mm electrode spacing, this device can achieve an ozone concentration of 13ppm in 500ml of static wastewater within 30 minutes. The commercially available carbon cloth is completely submerged in the electrolyte, and its reaction interface is a solid-liquid two-phase interface. Due to its low catalytic activity, its onset potential is high, requiring a higher cell voltage to reach a certain current. Ineffective energy consumption is converted into heat, and the surface is easily contaminated by organic matter and biofilm, covering the active sites, leading to module heating and low efficiency, thus resulting in a decrease in the detected concentration. The modified carbon cloth in Example 4, composed of a hydrophobic polytetrafluoroethylene network, hydrophilic catalytic sites, and gas-filled channels, forms a gas-liquid-solid three-phase interface. It has high catalytic activity, a low onset potential, and its hydrophobic surface is less prone to adhering to hydrophilic contaminants. Operating at a lower cell voltage, more electrical energy is used for effective reactions, resulting in lower energy consumption, less heat generation, and a relatively higher detected concentration.

[0136] Example 8 The difference between Example 8 and Example 5 is that the ozone electrochemical deodorization module is installed in the lid of the test container and extends downwards into the solution. Escherichia coli can be completely killed within 10 seconds (100% kill rate), and Staphylococcus aureus is killed at a rate exceeding 99.998% within 10 seconds, achieving complete killing within 20 seconds. Because the ozone electrochemical deodorization module extends into the solution, its gas outlet cannot cover the entire container. After gas exits, it moves upwards, and there are dead zones at the bottom of the container during the horizontal water inlet process, resulting in a slower sterilization speed compared to Example 5. In Example 5, the ozone electrochemical deodorization module is installed at the bottom of the test container. Ozone microbubbles are generated directly from the bottom of the container and float naturally. During this process, they fully mix and contact with water, rapidly dissolving and diffusing, achieving the oxidative decomposition of organic matter and the inactivation of microorganisms.

[0137] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A method of installing an electrochemical deodorization module for a sewage tank of a built-in cleaning device, characterized in that: The device comprises a shell (1), a first opening (15) in the shell (1), a reaction cavity (11) in the shell (1), a cover plate (2) covering the first opening (15), an anode assembly (3) and a cathode assembly (4) for generating ozone, an opening (13) in the shell (1), the cover plate (2) is provided with a mounting cavity (20), a conductive assembly (6) connected with the anode assembly (3) and the cathode assembly (4), a sealing element (9) sealing the mounting cavity (20), the anode assembly (3) comprises an anode reaction plate (31), the cathode assembly (4) comprises a first cathode reaction plate (41) and a second cathode reaction plate (42) located on both sides of the anode reaction plate (31). The installation method of the deodorization module comprises the following steps, S1, the anode assembly (3) and the cathode assembly (4) for generating ozone are installed in the reaction cavity (11), and the first cathode reaction plate (41) and the second cathode reaction plate (42) are located on both sides of the anode reaction plate (31); S2, the cover plate (2) is covered on the first opening (15), and one end of the anode assembly (3) and one end of the cathode assembly (4) respectively extend into the mounting cavity (20); S3, the anode assembly (3) and the cathode assembly (4) are respectively connected with the conductive assembly (6), and the mounting cavity (20) is added with the sealing element (9); S4, the shell (1) is connected at the bottom of the water tank through the cover plate (2) and is electrically connected and then operated.

2. The method of claim 1, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. In step S1, a pretreatment step S101 is further included, mirror polishing treatment is performed on the surface of the reaction cavity (11), and the surface roughness Ra is less than or equal to 0.8 μm.

3. The method of claim 1, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. A connecting lug (43) is arranged between the end of the first cathode reaction plate (41) and the end of the second cathode reaction plate (42); In step S1, a pretreatment step S102 is further included, the first cathode reaction plate (41), the second cathode reaction plate (42) and the connecting lug (43) are integrally formed.

4. The method of claim 1, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. In step S1, the anode assembly (3) adopts one or more of a tin-antimony oxide coating titanium electrode, a platinum-iridium alloy coating, a boron-doped diamond thin film electrode and a three-dimensional graphene foam electrode, and the cathode assembly (4) adopts one or more of a stainless steel electrode, a graphite plate, a carbon felt or a carbon cloth with surface modification treatment.

5. The method of installing an electrochemical deodorization module for a sewage tank of a built-in cleaning device according to claim 4, characterized in that: In step S1, a pretreatment step S103 is further included, the cathode assembly (4) is provided with a catalytic layer, a hydrophobic and breathable resin is compounded in the catalytic layer, and the catalytic layer is formed by secondary sintering.

6. The method of claim 3, wherein the method further comprises: The anode reaction plate (31) is provided with an anode insert (311), the first cathode reaction plate (41) is provided with a cathode insert (411), and the conductive assembly (6) comprises two conductive springs (61) respectively connected with the anode insert (311) and the cathode insert (411), and two conductive contacts (62) connected with the conductive springs (61); In step S3, the conductive springs (61) are respectively connected with the anode insert (311) and the cathode insert (411) first, and then the conductive contacts (62) are press-fitted on the conductive springs (61).

7. The method of claim 6, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. The connecting lug (43) is located on one side close to the cover plate (2), the connecting lug (43) is located on the first connecting edge (431) connected to the first cathode reaction plate (41), the second connecting edge (432) connected to the second cathode reaction plate (42), and the third connecting edge (433) connected between the first connecting edge (431) and the second connecting edge (432), the cover plate (2) is provided with a protrusion (24) facing the first opening (15), and the protrusion (24) is located on one side close to the anode tab (311); In step S2, the protrusion (24) faces the anode tab (311) so that the cover plate (2) covers the first opening (15).

8. The method of claim 1, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. The cross section of the shell (1) is rectangular, the opening (13) includes a first grid (131) and a second grid (132) located on the side of the shell (1), and a third opening (133) opposite to the first opening (15), the first grid (131) and the second grid (132) are oppositely arranged, the first cathode reaction plate (41) and the second cathode reaction plate (42) are both provided with a plurality of and uniformly arranged water permeable holes (44), and the width of the third opening (133) is greater than the distance between the first cathode reaction plate (41) and the second cathode reaction plate (42). In step S4, the third opening (133) faces upward so that the shell (1) is mounted to the bottom of the water tank.

9. The method of claim 6, wherein the method further comprises: providing a plurality of electrical leads; and connecting the plurality of electrical leads to the plurality of electrodes. The cover plate (2) is provided with a first mounting cavity connecting hole (21) for the anode tab (311) to extend into the mounting cavity (20), a second mounting cavity connecting hole (22) for the cathode tab (411) to extend into the mounting cavity (20), and a mounting cavity opening (23) of the mounting cavity (20), the anode tab (311) is provided with an anode tab boss (3111) extending into the mounting cavity (20), the cathode tab (411) is provided with a cathode tab boss (4111) extending into the mounting cavity (20), the mounting cavity (20) is provided with a limiting portion (201) clamping the conductive spring (61), and the sealing element (9) is sealing glue; In step S3, the sealing element (9) is injected and gap filled between the first mounting cavity connecting hole (21) and the second mounting cavity connecting hole (22).

10. The method of installing an electrochemical deodorization module for a sewage tank of a built-in cleaning appliance according to any one of claims 1 to 9, characterized in that: The reaction cavity (11) is provided with a limiting groove (5), the limiting groove (5) is provided with a first clamping groove (51) for the anode reaction plate (31) to extend into, a second clamping groove (52) for the first cathode reaction plate (41) to extend into, and a third clamping groove (53) for the second cathode reaction plate (42) to extend into, the distance between the anode reaction plate (31) and the first cathode reaction plate (41) is between 2mm-5mm, and the distance between the anode reaction plate (31) and the second cathode reaction plate (42) is between 2mm-5mm; In step S1, the anode reaction plate (31) is first put in, and then the first cathode reaction plate (41) and the second cathode reaction plate (42) are simultaneously put in.

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