Hydrogen peroxide preparation device and washing machine

Abstract

The hydrogen peroxide preparation device comprises a shell, the shell is provided with a gas conveying pipe, the gas conveying pipe is connected with a gas conveying assembly and used for conveying gas into the shell, an anode plate and a cathode plate which are electrically connected with a power source are arranged in the shell, the anode plate is immersed in water, and the cathode plate is immersed in water. And the cathode plate is located at a water-gas interface and is used for electrolyzing under a preset potential to generate hydrogen peroxide. According to the utility model, the two sides of the cathode plate are respectively in contact with water and gas all the time, so that the situation that the reaction is interrupted due to the fact that the cathode plate is completely immersed or separated from the water surface is prevented, and high-concentration H2O2 is stably generated; the gas pressure is dynamically adjusted through the gas transmission assembly, the influence of the working water level change of the washing machine on the water pressure in the shell is counteracted, it is ensured that the cathode plate is always located on a water-gas interface, and reaction interruption or electrode corrosion caused by water level fluctuation of a traditional device is avoided.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically, to a hydrogen peroxide preparation device and a washing machine. Background Technology

[0002] As living standards continue to improve, people are paying more and more attention to clothing cleaning and care. Traditional laundry methods often rely on detergents, using the mechanical force generated by the washing machine rotating the clothes in conjunction with the detergent to remove stains. However, detergent residue may pose a potential threat to human health.

[0003] To this end, Chinese Patent Publication No. CN1576440A discloses a washing machine, including an electrolytic water supply device, which electrolyzes water entering the electrolysis device from the washing tub by applying voltage to electrodes, generating hypochlorous acid and active oxygen (O2) that have bactericidal effects. 2- The process involves electrolyzing water and performing a rinsing cycle to disinfect laundry; however, this method generates hypochlorous acid and reactive oxygen species (O2) during water electrolysis. 2- Its stability is extremely poor, and its short shelf life affects the final sterilization effect.

[0004] Furthermore, Chinese patent CN111455614A discloses a drum washing machine that includes an ozone generator for producing ozone for sterilization. However, the ozone produced in this design has low solubility, resulting in less than ideal sterilization and washing performance.

[0005] Hydrogen peroxide, generated by the electrolysis of water under specific conditions, leaves no residue on clothing and is harmless to human health. Furthermore, its good stability and water solubility result in excellent stain removal, bleaching, and sterilization effects, making it a promising candidate for application in the clothing treatment field. Therefore, this invention is proposed. Utility Model Content

[0006] The problem solved by this invention is that the active ingredients in the electrolyzed water produced by existing devices have poor solubility and / or stability, resulting in unsatisfactory cleaning effects when used in household appliances such as washing machines.

[0007] To address the aforementioned problems, this utility model provides a hydrogen peroxide preparation device, comprising a housing, wherein a gas supply pipe is provided in the housing and connected to a gas supply assembly for supplying gas into the housing, and an anode plate and a cathode plate electrically connected to a power source are provided inside the housing, wherein the anode plate is immersed in water and the cathode plate is located at the water-gas interface for electrolyzing and generating hydrogen peroxide at a preset potential.

[0008] This setup ensures that the cathode plate is always located at the water-gas interface, simultaneously contacting H2O in the water and O2 in the gas, directly meeting the electrolysis reaction's requirements for both reactants and avoiding the reaction rate limitation problem caused by insufficient oxygen diffusion in traditional electrolysis devices.

[0009] Preferably, the bottom of the housing is provided with an air supply pipe, the top of the housing is open and communicates with an external washing container, the anode plate is located near the open and is submerged in water, and the cathode plate is located near the bottom of the housing relative to the anode plate.

[0010] This setup ensures that the cathode plate utilizes air supplied by the gas pipe to promote the generation of hydrogen peroxide during electrolysis. Simultaneously, the generated hydrogen peroxide can dissolve in water in a timely manner and enter the washing tub to prevent its rapid degradation, thereby preparing an electrolyte with a high concentration of hydrogen peroxide and a stable presence, thus improving the cleaning effect of washing machines and garment care machines.

[0011] Preferably, the hydrogen peroxide preparation device further includes a mounting frame, which is composed of multiple independent gas storage spaces. Each gas storage space is provided with a gas hole. The cathode plate is fixedly assembled onto the mounting frame. The sum of the cross-sections of the gas holes is S1, and the cross-section of the gas delivery pipe is S2, where S1 < S2.

[0012] This setup ensures that the incoming air contacts the cathode plate evenly through the vents, preventing situations where gas directly participates in the reaction in short areas while only a small amount of oxygen flows to distant areas, leading to complete immersion of the cathode plate (insufficient oxygen) or removal from the water surface (reaction interruption). This configuration maximizes electrolysis efficiency. Furthermore, since the gas supply pipe is located at the bottom of the shell, reducing the cross-sectional area of ​​the vents effectively prevents a large amount of unreacted gas from directly entering the washing tank, which could even affect the reaction process of the anode plate. Additionally, under the same gas pressure, the amount of gas flowing upward through the vents is essentially the same, facilitating the control of the reaction rate.

[0013] Preferably, the values ​​of S1 / S2 range from 0.1 to 0.8. This setting can limit the flow rate of gas entering the shell. The limiting groove cooperates with the protrusion of the cathode plate to achieve stable contact between the two sides of the cathode plate and water and gas respectively, thus solving the problem of decreased reaction efficiency caused by water level fluctuations in traditional electrolysis devices.

[0014] Preferably, the mounting bracket is provided with multiple limiting grooves, the air hole is located on the side of the limiting groove away from the cathode plate, the cathode plate is assembled with the limiting groove, and the hydrophobic interface of the cathode plate is set towards the anode plate while the gas-loving interface is exposed to the gas in the gas storage space.

[0015] This design involves setting several protrusions on the cathode plate and installing them into the limiting grooves. Even if one protrusion leaks due to the wear of the hydrophobic layer, poor sealing, or excessive water pressure, it will not affect the service life of the other protrusions.

[0016] Preferably, the mounting bracket is provided with multiple limiting grooves, and the air hole is located on the side of the limiting groove away from the cathode plate; the cathode plate is composed of multiple sub-plates, and the sub-plates are electrically connected to each other by connectors, with each sub-plate being assembled into the limiting groove. This arrangement ensures that even if a single cathode plate leaks, it will not affect the normal operation of other cathode plates.

[0017] Preferably, the inner wall of the housing is provided with a first groove and a second groove extending horizontally. The anode plate is inserted and fixed in the first groove, and the cathode plate is inserted and fixed in the second groove. One end of the housing is provided with a partition, which forms a wiring space with the side wall of the housing. The first terminal of the anode plate and the second terminal of the cathode plate are both fixed in the wiring space. This arrangement can limit the assembly of the anode plate and the cathode plate, and at the same time, the partition can spatially avoid the second terminal of the anode plate and the first terminal of the cathode plate to prevent short circuits.

[0018] Preferably, the horizontal distance between the anode plate and the cathode plate is 0.2-20 mm, and the preset potential is 1-40 V. This setting can optimize the electrolysis reaction kinetics, achieve a high hydrogen peroxide yield with low energy consumption, and is suitable for the conventional power supply conditions of household appliances.

[0019] Preferably, the anode plate is made of an electrocatalytic material, and the cathode plate is made of a carbon-based material.

[0020] This utility model also provides a washing machine, including a washing tub and the aforementioned hydrogen peroxide preparation device, wherein the hydrogen peroxide preparation device is located at the bottom or side of the washing tub, and the opening of the shell is connected to the washing tub.

[0021] Compared with existing technologies, the hydrogen peroxide preparation device and washing machine of this utility model have the following advantages: 1) The hydrogen peroxide preparation device maintains constant contact between the two sides of the cathode plate and water and gas, respectively, preventing the cathode plate from being completely submerged or detached from the water surface, which would interrupt the reaction and thus stably generate high-concentration H2O2; 2) The top of the shell is open and connected to the washing container, avoiding decomposition due to excessive residence time in the electrolytic cell. Compared with traditional devices that require collection and transfer, this is simpler and can achieve on-site production and use of H2O2 with stable concentration and high utilization rate; 3) Multiple cathode plates are respectively limited by the parallel installation of the limiting tank. 4) Even if a cathode plate leaks due to wear of the hydrophobic layer or failure of the seal, the rest can still work normally, avoiding the problem of global shutdown caused by partial damage to the traditional integral cathode plate; 5) The gas pressure is dynamically adjusted by the gas delivery component to counteract the influence of the working water level change of the washing machine on the water pressure inside the shell, ensuring that the cathode plate is always at the water-gas interface, avoiding the reaction interruption or electrode corrosion caused by water level fluctuations in traditional devices; 6) The hydrogen peroxide electrolysis device is directly connected to the washing tub of the washing machine and participates in the washing process in real time, breaking through the limitation of the independent operation of traditional electrolysis devices, replacing traditional chemical detergents, and achieving green cleaning. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of the hydrogen peroxide preparation device described in this embodiment of the present invention;

[0023] Figure 2 This is another perspective view of the hydrogen peroxide preparation apparatus described in this embodiment of the present invention;

[0024] Figure 3 This is a side view of the hydrogen peroxide preparation apparatus described in an embodiment of the present invention;

[0025] Figure 4 This is an exploded view of the hydrogen peroxide preparation apparatus described in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Shell; 11-Gas pipe; 12-First groove; 13-Second groove; 14-Limiting block; 15-Base plate; 2-Anode plate; 21-First connector; 3-Cathode plate; 31-Second connector; 4-Baffle; 5-Mounting bracket; 51-Air hole; 52-Limiting groove. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Without conflict, the technical features of the embodiments of this utility model can be combined with each other.

[0029] It should be noted that the use of terms such as "first" and "second" in this utility model 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.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] like Figure 1-4 As shown, a hydrogen peroxide preparation device includes a housing 1, wherein a gas supply pipe 11 is provided in the housing 1, the gas supply pipe 11 is connected to a gas supply assembly for supplying gas into the housing 1, and an anode plate 2 and a cathode plate 3 electrically connected to a power source are provided in the housing 1, the anode plate 2 is immersed in water, and the cathode plate 3 is located at the water-gas interface for electrolyzing and generating hydrogen peroxide at a preset potential.

[0033] This setup positions the cathode plate 3 at the water-gas interface during electrolysis, providing ample water and oxygen to promote hydrogen peroxide generation, resulting in high electrolysis efficiency. The reaction formula for preparing the H2O2 electrolyte on the cathode plate 3 can be represented as: O2 + 2H2O → 2H2O2.

[0034] As an example of this utility model, a gas supply pipe 11 is provided at the bottom of the housing 1 for supplying gas from the bottom of the housing 1 to the inside. The top of the housing 1 is open and connected to the washing tub of the washing machine. The anode plate 2 is located near the open and is submerged in water. The cathode plate 3 is located at the bottom of the housing 1.

[0035] This setup ensures that during electrolysis, the cathode plate 3 utilizes the air supplied by the gas pipe 11 to promote the generation of hydrogen peroxide. Simultaneously, the generated hydrogen peroxide dissolves promptly in the water and enters the washing tub to prevent rapid degradation, thus preparing an electrolyte with a high and stable hydrogen peroxide concentration. This improves the cleaning effect of washing machines and garment care machines. The reaction formula for preparing the H2O2 electrolyte on the cathode plate 3 can be represented as: O2 + 2H2O → 2H2O2.

[0036] As an example of this utility model, the hydrogen peroxide preparation device further includes a mounting frame 5, which is composed of multiple independent gas storage spaces. Each gas storage space is provided with a gas hole 51. The cathode plate 3 is fixedly assembled onto the mounting frame 5. The sum of the cross-sections of the gas holes 51 is S1, and the cross-section of the gas delivery pipe 11 is S2, where S1 < S2.

[0037] This setup allows the input air to contact the cathode plate 3 evenly through the vent 51, preventing situations where gas directly participates in the reaction in a short distance while only a small amount of oxygen flows to a distant area, resulting in the highest electrolysis efficiency. Furthermore, since the gas supply pipe 11 is located at the bottom of the shell 1, reducing the cross-sectional area of ​​the vent 51 effectively prevents a large amount of unreacted gas from directly entering the washing tank, which could even affect the reaction process of the anode plate 2. Additionally, under the same gas pressure, the amount of gas flowing upward through the vent 51 is essentially the same, facilitating the control of the reaction rate.

[0038] As an example of this utility model, the mounting frame 5 is provided with multiple limiting grooves 52, and the air hole 51 is located on the side of the limiting groove 52 away from the cathode plate 3. The cathode plate 3 is assembled with the limiting grooves 52, so that the cathode plate 3 can be regarded as being divided into multiple oxygen supply areas by multiple limiting grooves 52. With the increase of working time, the hydrophobic layer of the cathode plate 3 may be consumed, which may cause the cathode plate 3 to leak. By installing the cathode plate 3 on the mounting frame 5 composed of several limiting grooves 52, even if some areas of the cathode plate 3 leak due to the consumption of the hydrophobic layer, poor sealing, or excessive water pressure, it will not affect the independent oxygen supply of other limiting grooves 52, that is, it will not affect the service life of other areas of the cathode plate 3. As an example of this utility model, the mounting frame 5 is provided with multiple limiting grooves 52, and the air hole 51 is located on the side of the limiting groove 52 away from the cathode plate 3. The cathode plate 3 is composed of multiple sub-plates, and the sub-plates are electrically connected by connectors. Each sub-plate is assembled into the limiting groove 52. This setting ensures that even if a single daughterboard leaks, it will not affect the normal operation of other daughterboards.

[0039] As an example of this utility model, the inner wall surface of the housing 1 is provided with a first groove 12 and a second groove 13 that are parallel to each other. The anode plate 2 is inserted and assembled into the first groove 12 in the horizontal direction, and the cathode plate 3 is inserted and assembled into the second groove 13 in the horizontal direction. The cathode plate 3 is provided with a second terminal 31, and the anode plate 2 is provided with a first terminal 21. The hydrogen peroxide preparation device also includes a partition 4. A limiting block 14 is provided at one end of the housing 1. The partition 4 is slidably mounted to the limiting block 14 in the vertical direction. The first terminal 21 and the second terminal 31 are assembled into the installation space formed by the partition 4 and the side wall of the housing 1.

[0040] This setup can limit the assembly of the anode plate 2 and the cathode plate 3, while the partition plate 4 can spatially avoid the second terminal 21 of the anode plate 2 and the first terminal 31 of the cathode plate 3 to prevent short circuits.

[0041] As an example of this utility model, the anode plate 2 is made of an electrocatalytic material, such as an electrocatalytic material composed of platinum, gold, ruthenium, titanium, carbon-based materials, noble metals and transition metal oxides, or noble metals and carbon-based materials; the cathode plate 3 is made of a carbon-based material, such as carbon nanoplatelets, graphene, or graphite felt. For example, the cathode plate 3 is a graphite electrode, and the anode plate 2 is a ruthenium-iridium coated titanium plate electrode; alternatively, both the cathode plate 3 and the anode plate 2 can be made of low-cost graphite electrodes.

[0042] Preferably, the cathode plate 3 is a graphite electrode, which has a hydrophobic interface and a gas-loving interface disposed opposite to each other. The hydrophobic interface is located on the side of the anode plate 2 that is close to it and is immersed in the washing water, while the gas-loving interface is located on the side of the cathode plate 3 that is away from the anode plate 2 and is exposed to the air.

[0043] This setup allows the cathode plate 3 to be in full contact with both water and air simultaneously, thereby improving the efficiency of electrolytic hydrogen peroxide generation. In addition, the contact surface between the cathode plate 3 and water maintains stable hydrophobicity, which allows the generated H2O2 to quickly and effectively detach from the surface of the cathode plate 3, making it possible to generate a high-concentration hydrogen peroxide electrolyte.

[0044] As an example of this utility model, the anode plate 2 and the cathode plate 3 are placed horizontally, with the anode plate 2 located above the cathode plate 3, and the distance between them is 0.2-20mm. As an example of this utility model, the preset potential is between 1-40V.

[0045] As an example of this utility model, the hydrogen peroxide preparation device includes a gas delivery device. The gas delivery component is connected to the gas delivery pipe 11 to ensure that the gas entering through the bottom of the housing 1 maintains a preset pressure. This arrangement allows the cathode plate 3 to fully contact the water while ensuring it is not completely submerged in the washing water, and simultaneously provides the cathode plate 3 with more oxygen-containing gas. The gas delivery component can be an impeller, a gas pump, a gas compressor, etc.

[0046] Because the hydrogen peroxide preparation device is connected to the washing tub of the washing machine, the bottom of the casing 1 is under pressure due to the working water level. When the water pressure inside the casing 1 is greater than the gas pressure introduced through the gas pipe 11, the cathode plate 3 will be submerged in water, preventing oxygen from directly contacting the cathode plate 3 to participate in the electrolysis reaction. This leads to a decrease in the hydrogen peroxide yield or even prevents normal electrolysis. When the water pressure inside the casing 1 is less than the gas pressure introduced through the gas pipe 11, the hydrophobic interface of the cathode plate 3 cannot stably contact the water. As the generated hydrogen peroxide cannot quickly detach from the electrode surface, this adversely affects the yield and concentration of hydrogen peroxide. Specifically, during the electrolysis process, the washing water dynamically enters and exits the hydrogen peroxide preparation device, allowing the generated H2O2 electrolyte to directly participate in the washing or care of clothes. In this case, the generation of hydrogen peroxide is not affected by concentration, resulting in a larger production volume, which is suitable for the washing or rinsing process of clothes.

[0047] This utility model also provides a washing machine, including the aforementioned hydrogen peroxide preparation device, which can be disposed at the bottom or side of the clothing treatment device as needed. As an example of this utility model, the hydrogen peroxide preparation device is disposed at the bottom of the washing machine, with the anode plate 2 located above the cathode plate 3 and directly connected to the washing tub of the washing machine. This arrangement allows the electrolytic generation of H2O2 by the hydrogen peroxide preparation device to be coupled with the washing and other clothing treatment processes. During electrolysis, washing water or rinsing water continuously flows in and out, allowing the generated H2O2 electrolyte to directly participate in the washing or care of the clothes.

[0048] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A device for the production of hydrogen peroxide, characterized in that The shell (1) is provided with a gas delivery pipe (11) connected with a gas delivery assembly for delivering gas into the shell (1), the shell (1) is provided with an anode plate (2) and a cathode plate (3) electrically connected with a power source, the anode plate (2) is immersed in water, and the cathode plate (3) is located at the water-gas interface for electrolysis to generate hydrogen peroxide under a preset potential.

2. The hydrogen peroxide preparation apparatus according to claim 1, characterized by The bottom of the shell (1) is provided with a gas delivery pipe (11), the top of the shell (1) is provided with an opening and communicates with an external washing container, the anode plate (2) is arranged close to the opening and is immersed in water, and the cathode plate (3) is arranged close to the bottom of the shell (1) relative to the anode plate (2).

3. The device for hydrogen peroxide production according to claim 1 or 2, characterized in that, The hydrogen peroxide preparation device further comprises a mounting rack (5) composed of a plurality of independent gas storage spaces, any gas storage space is provided with a gas hole (51), the cathode plate (3) is fixedly assembled to the mounting rack (5), the sum of the cross sections of the gas holes (51) is S1, and the cross section of the gas delivery pipe (11) is S2, wherein S1 < S2.

4. The hydrogen peroxide preparation apparatus according to claim 3, characterized by The value range of S1 / S2 is 0.1-0.

8.

5. The hydrogen peroxide preparation apparatus according to claim 3, characterized by A plurality of limiting grooves (52) are arranged on the mounting rack (5), the gas holes (51) are located on the side of the limiting grooves (52) away from the cathode plate (3), the cathode plate (3) is assembled with the limiting grooves (52), and the hydrophobic interface of the cathode plate (3) faces the anode plate (2) and the gas-permeable interface is exposed to the gas in the gas storage space.

6. The hydrogen peroxide preparation apparatus according to claim 3, characterized by The mounting rack (5) is provided with a plurality of limiting grooves (52), and the gas holes (51) are located on the side of the limiting grooves (52) away from the cathode plate (3); the cathode plate (3) is composed of a plurality of sub-plates, and the sub-plates are electrically connected through connecting pieces, and each sub-plate is assembled into the limiting groove (52).

7. The hydrogen peroxide preparation apparatus according to claim 1, wherein The inner wall of the shell (1) is provided with a horizontally extending first groove (12) and a second groove (13), the anode plate (2) is inserted and fixed in the first groove (12), and the cathode plate (3) is inserted and fixed in the second groove (13); one end of the shell (1) is provided with a partition plate (4), the partition plate (4) and the side wall of the shell (1) form a wiring space, and a first wiring head (21) of the anode plate (2) and a second wiring head (31) of the cathode plate (3) are both fixed in the wiring space.

8. The hydrogen peroxide preparation apparatus according to claim 1, characterized by The horizontal distance between the anode plate (2) and the cathode plate (3) is 0.2-20mm, and the preset potential is 1-40V.

9. The hydrogen peroxide preparation apparatus according to claim 1, wherein The material of the anode plate (2) is an electrocatalytic material, and the material of the cathode plate (3) is a carbon-based material.

10. A laundry machine characterized by The washing barrel and the hydrogen peroxide preparation device according to any one of claims 1-9 are arranged at the bottom or side of the washing barrel, and the opening of the shell (1) communicates with the washing barrel.

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