Electrochemical active oxygen supply device for drum of washing machine and washing machine

Abstract

The invention provides an electrochemical active oxygen supply device for a drum of a washing machine and the washing machine. The device serves as a functional inner component, is tightly attached to the inner wall of an outer barrel of the washing machine or in a barrel gap, does not need to be connected with an external water path, achieves high integration with the roller, and reduces occupation of the effective washing volume of the roller to the maximum extent. A first shell and a second shell are combined to form a reaction space, and a difunctional anode electrode and a difunctional cathode electrode are integrated in the reaction space and are electrically connected with a positive electrode and a negative electrode of an external power supply respectively to form a complete electrochemical loop. When water flow naturally flows through the reaction space in the washing process, a specific working potential is applied to the difunctional anode electrode under constant potential control, so that hydrogen peroxide (H2O2) and / or hydroxyl radicals (OH) are / is generated on the surface of the difunctional anode electrode in an in-situ electrochemical mode.

Description

TECHNICAL FIELD The present application relates to the technical field of water treatment for washing machines, and particularly relates to an electrochemical active oxygen supply device for a washing machine drum and a washing machine. BACKGROUND With the increasing demand of consumers for laundry care and healthy washing, modern washing machines generally introduce sterilization and disinfection functions to effectively remove bacteria, viruses, fungi and other microorganisms attached to clothes.

[0001] At present, common washing machine sterilization technologies include high-temperature sterilization, ultraviolet (UV) sterilization, ozone (O3) sterilization, and silver ion (Ag + ) sterilization. However, these technologies each have obvious limitations: high-temperature washing has reliable sterilization effect, but has high energy consumption and is easy to damage fabric fibers; ultraviolet has weak penetration and is difficult to cover the folds or stacked areas of clothes, and has a sterilization blind area; ozone has strong oxidizing properties and can achieve room-temperature sterilization, but has a stimulating odor and poses a corrosion risk to rubber, plastic and other internal components of the washing machine; silver ions have long-lasting effects, but the release rate is difficult to control, and there is an environmental accumulation risk that may cause ecological toxicity problems.

[0002] In order to break through the above bottlenecks, research has gradually shifted to green sterilization paths based on active oxygen in recent years, especially through electrochemical means to generate hydrogen peroxide (H2O2) and hydroxyl radicals (•OH) and other highly active substances in situ during washing. This kind of substance has strong oxidizing ability, and the decomposition products are harmless and only water and oxygen, and can achieve efficient sterilization and stain removal at low temperatures. However, existing electrochemical generation devices are mostly external independent devices, which have low integration, large volume and complex operation. More importantly, active oxygen is prone to decomposition or side reactions during transportation from the generation device to the washing chamber, resulting in a significant reduction in the effective active oxygen concentration reaching the washing area, which cannot cover the entire washing process, and the removal effect of stubborn stains and deep microorganisms is limited, making it difficult to achieve sufficient and continuous action on clothes. SUMMARY The purpose of the present application is to provide an electrochemical active oxygen supply device for a washing machine drum, which solves the problems of existing external devices, such as limited space and time for transportation, limited range of action, and insufficient effect on stubborn stains and microorganisms.

[0003] The present application is realized by the following technical solutions: An electrochemical active oxygen supply device for a washing machine drum, comprising a first shell and a second shell, a reaction space for electrochemistry is formed between the first shell and the second shell, a cathode electrode and a bifunctional anode electrode are arranged in the reaction space, when water flows through the reaction space, the surface of the bifunctional anode electrode generates hydrogen peroxide and / or hydroxyl radicals by controlling the potential of the bifunctional anode electrode.

[0004] The electrochemically active oxygen supply device for a washing machine drum as described above, the bifunctional anode electrode is a titanium-based electrode with a boron-doped diamond coating or a tin-antimony oxide coating.

[0005] The electrochemically active oxygen supply device for a washing machine drum as described above, the cathode electrode is a gas diffusion electrode composed of a gas diffusion layer and a selective catalytic layer.

[0006] The electrochemically active oxygen supply device for a washing machine drum as described above, the cathode electrode is provided with a plurality of first flow holes for increasing the contact area between water and the electrode.

[0007] The electrochemically active oxygen supply device for a washing machine drum as described above, the distance between the cathode electrode and the bifunctional anode electrode is 1-3mm.

[0008] The electrochemically active oxygen supply device for a washing machine drum as described above, the first housing is provided with a first mounting portion connected with the second housing, and a plurality of first limiting blocks for limiting the second housing and a plurality of second limiting blocks and third limiting blocks for fixing the electrodes are arranged on the first mounting portion.

[0009] The electrochemically active oxygen supply device for a washing machine drum as described above, a first fixing groove for fixing the second housing is formed between adjacent first limiting blocks and second limiting blocks; a second fixing groove for fixing the electrodes is formed between adjacent second limiting blocks and third limiting blocks.

[0010] The electrochemically active oxygen supply device for a washing machine drum as described above, the second housing is provided with a second mounting portion connected with the first mounting portion, and a plurality of third fixing grooves for accommodating the first limiting blocks and a plurality of fourth fixing grooves for accommodating the second limiting blocks are arranged on the second mounting portion.

[0011] The electrochemically active oxygen supply device for a washing machine drum as described above, the second housing is provided with a groove for accommodating the electrodes, and a plurality of second flow holes for increasing the contact area between water and the electrodes and a plurality of fourth limiting blocks for fixing the electrodes are arranged in the groove, and the fourth limiting blocks are provided with a plurality of fifth fixing grooves for fixing.

[0012] The purpose of the present application is to provide a washing machine comprising the electrochemically active oxygen supply device for a washing machine drum.

[0013] The beneficial effects of the present application are as follows: This invention provides an electrochemical active oxygen supply device for a washing machine drum. As a functional internal component, it fits tightly against the inner wall of the outer drum or in the drum gap, eliminating the need for external water connection and achieving high integration with the drum, minimizing the occupation of the drum's effective washing volume. It adopts a compact, split structure, with a reaction space formed by the combination of a first and second shell. Inside, a dual-function anode electrode and a cathode electrode are integrated, each electrically connected to the positive and negative terminals of an external power supply, forming a complete electrochemical circuit. When water flows naturally through the reaction space during the washing process, a specific working potential is applied to the dual-function anode electrode under constant potential control, causing in-situ electrochemical generation of hydrogen peroxide (H2O2) and / or hydroxyl radicals (•OH) on its surface. By precisely controlling the potential and selecting the type of active oxygen as needed, the device achieves instantaneous generation and utilization of active oxygen, fully leveraging the stable oxidizing properties of H2O2 and the instantaneous strong oxidizing power of •OH, synergistically improving sterilization efficiency and detergency performance under normal or low temperature conditions. [Attached Image Description] Figure 1 The structural three-dimensional representation of the present invention Figure 1 ; Figure 2 The structural three-dimensional representation of the present invention Figure 2 ; Figure 3 This is a top view of the structure of the present invention; Figure 4 for Figure 3 Sectional view at point AA; Figure 5 Structural breakdown of the present invention Figure 1 ; Figure 6 Structural breakdown of the present invention Figure 2 ; Figure 7 This is a schematic diagram of the first housing structure of the present invention; Figure 8 This is a schematic diagram of the second housing structure of the present invention; Figure 9 This is a schematic diagram illustrating the relationship between hydrogen peroxide concentration and time according to the present invention. Figure 10 This is a schematic diagram illustrating the relationship between the concentration of hydroxyl radicals and time according to the present invention.

Detailed Implementation Methods

[0014] The laundry machine drum electrochemically active oxygen supply device of the present application is a functional internal component that closely fits in the inner wall of the outer cylinder of the washing machine or the gap between the cylinder, without the need to connect external waterways, realizing high integration with the drum and minimizing the occupation of the effective washing volume of the drum. A compact split structure is adopted, and the reaction space is formed by the combination of the first housing and the second housing, which internally integrates the bifunctional anode electrode and the cathode electrode, both of which are electrically connected to the positive and negative poles of the external power source, respectively, to form a complete electrochemical circuit. When water flows through the reaction space naturally during the washing process, a specific working potential is applied to the bifunctional anode electrode under constant potential control, so that hydrogen peroxide (H2O2) and / or hydroxyl radicals (•OH) are generated on the surface of the bifunctional anode electrode in situ by electrochemistry. By precisely regulating the potential and selecting the type of active oxygen as needed, the active oxygen is generated and utilized immediately, fully utilizing the stable oxidizing property of H2O2 and the instantaneous strong oxidizing ability of •OH, and synergistically improving the sterilization efficiency and stain removal performance under normal or low temperature conditions.

[0015] Specifically, during electrochemical reaction, a two-electron oxygen reduction reaction (2e - ORR) occurs on the surface of the cathode: O2+2H + +2e - →H2O2; The bifunctional anode surface is divided into the following two cases under different potential conditions: a) When a relatively low potential is applied, a two-electron water oxidation reaction (2e - WOR) occurs, generating hydrogen peroxide: 2H2O→H2O2+2H + +2e - ; b) When a specific (pulse) potential is applied, a hydrogen peroxide activation reaction occurs, generating hydroxyl radicals: H2O2+e - →•OH+OH - ; and / or a water oxidation reaction occurs directly, generating hydroxyl radicals: H2O→•OH+H + +e - .

[0016] Among them, hydrogen peroxide (H2O2) is a green disinfectant, and its decomposition products are only water and oxygen, without secondary pollution or harmful residues. Hydroxyl radical (•OH) has strong oxidizing ability and can non-selectively and efficiently degrade organic stains and inactivate bacteria, viruses and other microorganisms.

[0017] The application utilizes dissolved oxygen in water / oxygen in air by cathode to generate H2O2 in situ by electrochemistry; at the same time, under the precise potential regulation of the dual-function anode, on the one hand, it can directly oxidize water to generate •OH, and on the other hand, it can efficiently activate the generated H2O2 to further produce •OH with stronger activity, thereby realizing the multi-path generation mechanism on the surface of a single electrode. H2O2 and •OH cooperatively form active oxygen treatment liquid, which is generated in situ in the washing water flow and acts on the surface of clothes, and is dynamically dispersed with the water flow in the form of microbubbles or dissolved state, and penetrates into the areas such as the gaps of clothes fibers and the dead corners of the drum which are difficult to reach by traditional technologies. In addition, the device can continuously operate in the whole cycle of washing, rinsing and even soaking, and by adjusting the electrode potential, the real-time dynamic control of the generation intensity of active oxygen is realized, thereby effectively improving the sterilization efficiency and stain removal performance under normal temperature or low temperature conditions.

[0018] Further, the dual-function anode electrode 5 is a titanium-based electrode with a boron-doped diamond coating or a tin-antimony oxide coating.

[0019] Among them, the dual-function anode electrode 5 is provided with a positive plug 51 for connecting an external power source.

[0020] The dual-function anode electrode of the application adopts titanium (Ti) as the electrode substrate, and the surface thereof is modified with a boron-doped diamond (BDD) coating or a tin-antimony oxide (Sb-SnO2) coating, thereby endowing the single anode electrode with dual-function characteristics. Among them, the titanium substrate has excellent chemical stability and corrosion resistance, and can spontaneously form a dense titanium dioxide (TiO2) passivation film under water environment and strong oxidizing electrochemical conditions, effectively resisting corrosion and protecting the long-term integrity of the electrode structure; at the same time, it has good electrical conductivity and mechanical strength, which can efficiently conduct current to drive electrochemical reactions and provide stable support for the surface coating to avoid deformation or coating peeling in water flow impact or assembly process. The BDD coating or Sb-SnO2 coating modified on the surface endows the anode with high oxygen evolution overpotential and excellent electrocatalytic activity. Through the synergistic effect of the titanium substrate and the functional coating, the dual-function anode can not only operate stably for a long time, but also can accurately regulate the generation path and intensity of •OH through potential, and cooperate with the H2O2 generated by the cathode to jointly build an active oxygen output mode that can be switched as needed, thereby flexibly meeting the stain removal and sterilization needs of the washing machine in different scenarios such as daily washing and deep sterilization.

[0021] Further, the thickness of the boron-doped diamond coating and the tin-antimony oxide coating is 0.5-20 μm.

[0022] The present application ensures high efficiency and stability of active oxygen electrochemical generation by optimizing the coating thickness, while maintaining high catalytic activity. If the thickness is <0.5 μm, the coating is too thin, which may result in incomplete coverage, insufficient active sites, or easy wear and tear, thus shortening the service life. If the thickness is >20 μm, the internal resistance of the coating will increase, which will affect the conductivity, or cause excessive stress and fall off, thus reducing the catalytic efficiency and stability.

[0023] Further, the cathode electrode 4 is a gas diffusion electrode composed of a gas diffusion layer and a selective catalytic layer.

[0024] The cathode electrode 4 is provided with a negative tab 41 for connecting an external power source.

[0025] The cathode electrode of the present application is a gas diffusion electrode, which adopts a hydrophobic carbon paper as a gas diffusion layer, and the surface of the carbon paper is loaded with a selective catalytic layer. The catalytic layer adopts a non-noble metal material (such as boron-nitrogen co-doped mesoporous carbon, carbon nanotube, etc.) that promotes two-electron oxygen reduction reaction (2e - ORR). A hydrophobic and breathable resin (such as polytetrafluoroethylene) is also incorporated, and after secondary sintering, a micrometer-scale porous channel is formed, which constructs a stable gas-liquid-solid three-phase reaction interface, significantly improves the oxygen mass transfer efficiency, effectively suppresses the competitive side reactions such as hydrogen evolution, reduces the invalid energy consumption, and ensures the high efficiency and selectivity of the catalytic reaction.

[0026] Further, the cathode electrode 4 is provided with a plurality of first liquid flow holes 42 for increasing the contact area between water and the electrode.

[0027] The liquid flow holes can guide the water flow to penetrate the electrode structure more uniformly, significantly improve the contact efficiency of the water flow with the surfaces of the cathode and anode electrodes, make full use of the catalytic active area of the electrodes, and thus improve the generation rate of active oxygen. At the same time, the liquid flow holes induce local turbulence of the water flow, strengthen the mass transfer of reactants (such as dissolved oxygen) to the electrode surface, and accelerate the diffusion of products (such as H2O2) away, effectively alleviate the concentration polarization phenomenon, and further improve the electrochemical reaction efficiency.

[0028] Further, the distance between the cathode electrode 4 and the bifunctional anode electrode 5 is 1-3 mm.

[0029] The distance between the cathode electrode and the bifunctional anode electrode will affect the electrochemical reaction rate and the water mass transfer effect. By optimizing the distance between the electrodes, the present application can significantly reduce the internal resistance of the reaction chamber, reduce the energy consumption, shorten the mass transfer path of the reactants and products, improve the current efficiency, reduce the residence time of H2O2 in the reaction chamber, inhibit its decomposition, and thus improve the output concentration of effective active oxygen and the system response speed.

[0030] In the embodiment, the distance between the cathode electrode 4 and the bifunctional anode electrode 5 is 3 mm, and the areas of the two are the same, which can meet the requirements of high-efficiency electrochemical reaction and has good anti-clogging capacity, and is suitable for complex water quality environment of household washing machines.

[0031] Further, the first shell 1 is provided with a first mounting part 10 connected with the second shell 2, and a plurality of first limiting blocks 101 for limiting the second shell 2 and a plurality of second limiting blocks 102 and third limiting blocks 103 for fixing electrodes are arranged on the first mounting part 10.

[0032] In the embodiment, four first limiting blocks 101, six second limiting blocks 102 and three third limiting blocks 103 are arranged on the first mounting part 10. Figure 7 As shown in the figure, the four first limiting blocks are evenly distributed along the outer periphery of the first mounting part. The six second limiting blocks and the three third limiting blocks form three fixing structures, and each fixing structure has the arrangement form of “second limiting block-third limiting block-second limiting block”, and the three fixing structures are evenly arranged in the region between the four first limiting blocks.

[0033] Further, a first fixing groove 111 for fixing the second shell 2 is formed between the adjacent first limiting block 101 and the second limiting block 102, and a second fixing groove 112 for fixing the electrode is formed between the adjacent second limiting block 102 and the third limiting block 103.

[0034] The first shell 1 is stably connected with the second shell through a plurality of first fixing grooves, and the cathode electrode and the bifunctional anode electrode are respectively clamped and axially / radially limited by a plurality of second fixing grooves, which effectively prevents the electrodes from being displaced, warped or poorly contacted in water flow impact or washing machine operation vibration. At the same time, the specific distance of 1-3 mm between the cathode and the anode is maintained, so as to improve the current efficiency and the active oxygen generation stability.

[0035] Further, the first shell 1 is provided with a sealing surface 11, and the sealing surface 11 is provided with a sealing ring 6.

[0036] In the embodiment, the sealing ring 6 is a perfluoroether rubber (FFKM) O-ring, which is used for static sealing to ensure long-term sealing performance in the temperature range of-20-200℃.

[0037] Further, the first shell 1 is further provided with a first limiting hole 104 and a second limiting hole 105 for fixing the electrode.

[0038] In the embodiment, the negative tab 42 of the cathode electrode is inserted into the first limiting hole 104, and the positive tab 51 of the bifunctional anode electrode 5 is inserted into the second limiting hole 105, so as to realize the positioning and fixing of the electrode and the integration of the electrical connection.

[0039] Further, the second shell 2 is provided with a second mounting portion 20 connected with the first mounting portion 10, the second mounting portion 20 is provided with a plurality of third fixing grooves 201 for accommodating the first limiting blocks 101 and a plurality of fourth fixing grooves 202 for accommodating the second limiting blocks 102.

[0040] The third fixing grooves and the first limiting blocks, and the fourth fixing grooves and the second limiting blocks form corresponding nested fitting structures, which play a self-guiding role in the assembly process. After the first limiting blocks and the second limiting blocks are respectively embedded in the third fixing grooves and the fourth fixing grooves, they are constrained in the axial, radial and circumferential directions, forming multi-degree-of-freedom limiting, which can reduce the gap of the shell joint surface and provide a uniform compression environment for the sealing ring. Under the working conditions of high-speed dehydration of the washing machine, water flow impact and long-term vibration, the relative displacement, loosening or misalignment of the two shells can be effectively prevented, and the geometric integrity and sealing reliability of the reaction space are ensured. Further, the second shell 2 is provided with a groove 21 for accommodating the electrode, the groove 21 is provided with a plurality of second liquid flow holes 210 for increasing the contact area between water and the electrode and a plurality of fourth limiting blocks 211 for fixing the electrode, and the fourth limiting blocks 211 are provided with a plurality of fifth fixing grooves 212 for fixing.

[0041] The groove provides an overall embedding space for the electrode, the side wall of the groove is provided with a plurality of second liquid flow holes, so that the washing water flow can pass through or flow around the surface of the electrode from the back or side of the electrode, and at the same time cooperates with the plurality of first liquid flow holes of the cathode electrode to form a bidirectional or annular flow channel, maximizes the effective reaction area, enhances the mass transfer efficiency of the water-electrode interface, and improves the active oxygen generation rate. Secondly, the fourth limiting blocks and the fifth fixing grooves thereon locally clamp and limit the edge or specific parts of the electrode, and cooperate with the second fixing grooves and the third fixing grooves of the first shell to form double-sided clamping or multi-point constraint, ensuring the structural stability of the electrode.

[0042] The implementation is used as follows: The cathode electrode 4 and the bifunctional anode electrode 5 are respectively connected with the negative pole and the positive pole of an external power supply to form an electrochemical loop. When water flows through the reaction space 3, according to a washing process signal, a multi-channel constant potential instrument is used to control the potential of the cathode electrode 4 and the bifunctional anode electrode 5, so that hydrogen peroxide and / or hydroxyl radicals are generated on the surface of the bifunctional anode electrode 5, and an active oxygen treatment liquid containing hydrogen peroxide and / or hydroxyl radicals is formed.

[0043] A washing machine comprises an electrochemical active oxygen supply device for a drum of the washing machine.

[0044] The laundry machine drum electrochemically active oxygen supply device was tested for performance, with the following test conditions: Hydrogen peroxide concentration test: 1 L of tap water (pH = 7.2, total dissolved solids TDS = 150 ppm, total dissolved chlorine 0.6 mg / L) was placed in an external test water tank, and pumped into the electrochemically active oxygen supply device at a flow rate of 400 mL / min. The dual-function anode and cathode electrodes of the device were connected to the positive and negative poles of an external power source, respectively, and a multi-channel potentiostat was used to control the electrode potential, with the power source providing 12 V DC power. After 60 minutes of cyclic reaction, the sample was collected, and N, N-diethyl-p-phenylenediamine spectrophotometry was used to determine the hydrogen peroxide (H2O2).

[0045] Table 1 Hydrogen peroxide concentration test

[0046] Hydroxyl radical concentration test: 25 L of tap water (pH = 7.2, total dissolved solids TDS = 150 ppm) was placed in an external test water tank, and pumped into the electrochemically active oxygen supply device at a flow rate of 12 L / min. The dual-function anode and cathode electrodes of the device were connected to the positive and negative poles of an external power source, respectively, and a multi-channel potentiostat was used to control the electrode potential, with the power source providing 12 V DC power. After 60 minutes of cyclic reaction, the sample was collected, and electron spin resonance (ESR) combined with DMPO spin trapping technology was used to quantitatively analyze the hydroxyl radicals (·OH).

[0047] Table 2 Hydroxyl radical concentration test

[0048] Bacillus sp. killing effect test: According to the 2.1.1.7 section of the “Disinfection Technical Specification” (2002 edition) of the Ministry of Health of the People’s Republic of China, quantitative germicidal test was performed. The prepared Bacillus sp. suspension (concentration 2.5 x 10 6 CFU / sheet) was inoculated on the carrier and placed in the device action environment for treatment. The Bacillus sp. inoculated carrier was exposed to the device action environment in operation for 30 minutes. The test was divided into three parallel groups, and after the end, the residual viable bacteria count was counted and compared with the untreated control group, and the killing logarithm value (KL) and killing rate (%) were calculated.

[0049] Test environment: The test was conducted in a controlled laboratory environment, with stable temperature and humidity.

[0050] Test strain: Bacillus subtilis var. niger spores (Bacillus subtilis var. niger, ATCC 9372), as a standard biological indicator with strong resistance.

[0051] Table 3 Bacillus killing effect test

[0052] As shown in Figure 9 , the concentration of H2O2 in tap water reached 100 mg / L after 60 min of circulation reaction by the electrochemical active oxygen supply device. As shown in Figure 10 , the concentration of ·OH in tap water reached 35 μmol / L after 60 min of circulation reaction by the electrochemical active oxygen supply device.

[0053] As shown in Table 3, the electrochemical active oxygen supply device of the present application showed high and stable killing effect on Bacillus subtilis var. niger spores within 30 min of action time, with an average killing logarithmic value greater than 1.8 KL and a killing rate of more than 98.3%.

[0054] The results show that the electrochemical active oxygen supply device as a functional internal component directly generates H2O2 with sustained oxidation ability and highly active transient oxidation species ·OH in the inner wall of the outer cylinder or the gap between the cylinder of the washing machine. The two form active oxygen treatment liquid in cooperation, and the concentration level can meet the disinfection and stain removal requirements in the household washing scene. Not only can it efficiently degrade organic stains such as protein, oil and odor molecules, significantly improve the cleaning efficiency, but also can effectively kill a variety of microorganisms including highly resistant spores, and can be widely used in places requiring high level disinfection.

[0055] The above only takes examples to further illustrate the technical content of the present application, so that the reader can more easily understand, but does not represent that the embodiments of the present application are limited to this. Any technical extension or re-creation made according to the present application is protected by the present application. The protection scope of the present application is subject to the claims.

Claims

1. An electrochemically active oxygen supply device for a washing machine drum, comprising a first housing (1) and a second housing (2), characterized in that: The first shell (1) and the second shell (2) form a reaction space (3) for electrochemical reaction, the reaction space (3) is provided with a cathode electrode (4) and a bifunctional anode electrode (5), when water flows through the reaction space (3), the surface of the bifunctional anode electrode (5) generates hydrogen peroxide and / or hydroxyl radicals by controlling the potential of the bifunctional anode electrode (5).

2. The apparatus for supplying electrochemically active oxygen to a drum of a washing machine according to claim 1, characterized in that: The bifunctional anode electrode (5) is a titanium-based electrode with a boron-doped diamond coating or a tin-antimony oxide coating.

3. The apparatus according to claim 1, wherein: the electrolytic active oxygen supply device is a laundry machine drum electrolytic active oxygen supply device. The cathode electrode (4) is a gas diffusion electrode composed of a gas diffusion layer and a selective catalytic layer.

4. The apparatus according to claim 1, wherein: the apparatus is a laundry machine drum. The cathode electrode (4) is provided with a plurality of first liquid flow holes (42) for increasing the contact area between water and the electrode.

5. The apparatus according to claim 1, wherein: the electrolytically active oxygen supply device is a laundry machine drum. The distance between the cathode electrode (4) and the bifunctional anode electrode (5) is 1-3mm.

6. The apparatus according to claim 1, wherein: the electrolytically active oxygen is supplied to the drum of the washing machine. The first shell (1) is provided with a first mounting part (10) connected with the second shell (2), the first mounting part (10) is provided with a plurality of first limiting blocks (101) for limiting the second shell (2), a plurality of second limiting blocks (102) and third limiting blocks (103) for fixing the electrode.

7. The apparatus according to claim 6, wherein: The first limiting block (101) and the second limiting block (102) form a first fixing groove (111) for fixing the second shell (2); the second limiting block (102) and the third limiting block (103) form a second fixing groove (112) for fixing the electrode.

8. The apparatus according to claim 6, wherein: The second shell (2) is provided with a second mounting part (20) connected with the first mounting part (10), the second mounting part (20) is provided with a plurality of third fixing grooves (201) for accommodating the first limiting block (101) and a plurality of fourth fixing grooves (202) for accommodating the second limiting block (102).

9. The apparatus according to claim 8, wherein: The second shell (2) is provided with a groove (21) for accommodating the electrode, the groove (21) is provided with a plurality of second liquid flow holes (210) for increasing the contact area between water and the electrode and a plurality of fourth limiting blocks (211) for fixing the electrode, the fourth limiting block (211) is provided with a plurality of fifth fixing grooves (212) for fixing.

10. A laundry machine characterized by: The electrochemically active oxygen supply device for a washing machine drum comprises the electrochemically active oxygen supply device for a washing machine drum according to any one of claims 1-9.

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