Adsorption catalytic material, deodorization device and deodorization method, and intelligent toilet

Abstract

The present invention discloses an adsorption catalytic material, a deodorization device, a deodorization method, and an intelligent toilet. The adsorption catalytic material comprises a porous carrier, at least one non-precious metal active layer, and at least one precious metal active layer, which are alternately stacked on the porous carrier. The adsorption catalytic material has the advantage of first adsorbing and aggregating, followed by catalytic degradation, thereby improving the single-pass deodorization rate. The deodorization device includes a dielectric barrier discharge module with the adsorption catalytic material filled between its high-voltage and ground electrodes. A multi-speed deodorization method utilizing this deodorization device is designed, automatically selecting the deodorization speed based on odor concentration. This intelligent and convenient method enhances user enjoyment.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent toilets, and in particular to an adsorption catalytic material, a deodorizing device and method, and an intelligent toilet. Background Art

[0002] The deodorization modules currently used in smart toilets are generally porous adsorption materials such as activated carbon or diatomaceous earth. They are physical adsorption materials with non-selective adsorption. They easily adsorb water vapor and become ineffective. They are easily saturated, resulting in a low deodorization rate in one pass. Moreover, desorption after saturation will cause secondary pollution. There are also deodorization modules that use chemical reaction materials, but their reactants are limited, their service life is short, and they need to be replaced regularly. Summary of the Invention

[0003] The present invention aims to address, to at least some extent, one of the aforementioned technical problems in the related art. To this end, the present invention provides an adsorption-catalytic material, a deodorization device, a deodorization method, and an intelligent toilet. These materials employ a first-pass adsorption and aggregation method followed by catalytic degradation, significantly improving the first-pass deodorization rate and achieving highly efficient deodorization.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention proposes an adsorption catalytic material, comprising a porous support, at least one non-precious metal active layer and at least one precious metal active layer, wherein the non-precious metal active layer and the precious metal active layer are loaded on the porous support in an alternating stacking manner, wherein the non-precious metal active layer comprises the following raw materials: Al2O3, an inorganic sol and a non-precious metal active agent, wherein the non-precious metal active agent comprises at least one of CeO2, tourmaline, CuO, Cu2O, ZnO or MnO2; the precious metal active layer comprises the following raw materials: Al2O3, an inorganic sol and a precious metal active agent; and the Al2O3 has a porous structure.

[0006] According to some embodiments of the present invention, the precious metal activator includes RuO2 and IrO2. Ru has the highest catalytic degradation activity among platinum group metals, but its stability is average. The addition of Ir can improve its stability. Furthermore, the mass ratio of RuO2 to IrO2 is (2-4): (1-2).

[0007] According to some embodiments of the present invention, the raw materials of the non-precious metal active layer are calculated in the following parts by weight: 20-40 parts of Al2O3, 10-30 parts of inorganic sol, and 27-55 parts of non-precious metal active additive.

[0008] According to some embodiments of the present invention, the non-precious metal activating agent includes CeO2, tourmaline, CuO, Cu2O, ZnO, and MnO2. Furthermore, the mass ratio of Al2O3, CeO2, tourmaline, CuO, Cu2O, ZnO, and MnO2 is (20-40): (2-5): (5-10): (5-10): (5-10): (5-10): (5-10).

[0009] According to some embodiments of the present invention, the raw materials of the noble metal active layer are calculated in the following parts by weight: 40-60 parts of Al2O3, 10-30 parts of inorganic sol, and 15-30 parts of noble metal active additive.

[0010] According to some embodiments of the present invention, the inorganic sol is at least one of silica sol or aluminum sol.

[0011] According to some embodiments of the present invention, the tourmaline is black tourmaline. The chemical formula of black tourmaline is NaFe3Al6(BO3)3(Si6O 18 )(OH)4, Fe is Fe 2+ , can regulate the price of copper ions (Cu 2+ , Cu + ), and the Fe element has certain catalytic degradation activity.

[0012] According to some embodiments of the present invention, the Al2O3 is γ-Al2O3. γ-Al2O3 has a highly developed porous structure and a high specific surface area. γ-Al2O3 contains a large number of structural defects, such as oxygen vacancies and aluminum vacancies, which provide active sites in catalytic reactions.

[0013] According to some embodiments of the present invention, the porous carrier is ceramic paper or honeycomb ceramic. Ceramic paper or honeycomb ceramic allows airflow while simultaneously carrying catalytically active materials, which can adsorb and collect odor molecules. Its high dielectric constant facilitates the dielectric barrier discharge reaction, and its high porosity facilitates the loading of more catalytically active materials and the adsorption of more odor molecules.

[0014] According to some embodiments of the present invention, the number of layers of the non-precious metal active layer and the precious metal active layer is 3-6, respectively. The number of layers is mainly determined by the coverage and service life requirements. Too few layers may not achieve 100% surface coverage, while too many layers may block the pores of the porous support, affecting airflow.

[0015] The present invention also provides a method for preparing the adsorption catalytic material, comprising the following steps:

[0016] S1: mixing the raw materials of the non-precious metal active layer and adding water to obtain a first slurry; mixing the raw materials of the precious metal active layer and adding water to obtain a second slurry;

[0017] S2: Alternately immersing the porous support in the first slurry and the second slurry, and drying after each immersion, thereby cyclically performing the "immersion-drying-immersion-drying" operation to obtain an impregnated porous support;

[0018] S3: heating the impregnated porous carrier to obtain the adsorption catalytic material.

[0019] According to some embodiments of the present invention, in step S1, the first slurry and / or the second slurry are ball-milled before impregnation. Furthermore, after ball-milling, the particle size of the particles in the first slurry and / or the second slurry is less than 1 μm. Furthermore, the ball-milling time is 12-24 hours.

[0020] According to some embodiments of the present invention, in step S1, the amount of water added to the first slurry is 0.5-5 times the total weight of the raw materials of the non-precious metal active layer. The amount of water added to the second slurry is 0.5-5 times the total weight of the raw materials of the precious metal active layer.

[0021] According to some embodiments of the present invention, in step S2, the first slurry and / or the second slurry are placed in an ultrasonic bath during the impregnation process, and the impregnation process is performed under ultrasound. Ultrasonic waves promote mixing and diffusion of the materials, allowing the materials to adhere more easily and effectively to the porous support. Furthermore, each impregnation period lasts 20-30 minutes. Furthermore, each drying period lasts 1-2 hours at a temperature of 80-120°C.

[0022] According to some embodiments of the present invention, in step S3, the heating temperature is 200-300° C., and the heating time is 2-4 hours.

[0023] The present invention also provides a deodorizing device based on dielectric barrier discharge, comprising a dielectric barrier discharge module, the module including a high-voltage electrode and a ground electrode, with the adsorption catalytic material filled between the high-voltage electrode and the ground electrode. Gas can pass through the adsorption catalytic material.

[0024] According to some embodiments of the present invention, the dielectric barrier discharge module has a cylindrical structure, the grounding electrode is a metal cylinder or metal mesh cylinder, and the high-voltage electrode is a metal wire or metal rod. The high-voltage electrode is arranged at the central axis inside the grounding electrode. The deodorization device also includes a thin film heater, which is attached to the outer surface of the grounding electrode. Gas enters from one end of the dielectric barrier discharge module, flows through the adsorption catalytic material, and then flows out from the other end of the cylinder. The thin film heater is arranged on the outer surface of the grounding electrode. Under the action of heat, the catalytic activity of the adsorption catalytic material is enhanced, the product is safe, there are no byproducts, and the deodorization is faster, more efficient, and more comprehensive. Furthermore, the metal cylinder or metal mesh cylinder is made of one of stainless steel, copper-tungsten alloy, tungsten-molybdenum alloy, or iron-chromium-aluminum alloy. The thin film heater is a commercially available product made of a flexible thin film and can be directly attached to the outer surface of the metal cylinder or metal mesh cylinder using thermally conductive adhesive.

[0025] According to some embodiments of the present invention, the high voltage electrode is a tungsten filament, which provides negative high voltage electricity to promote air ionization.

[0026] According to some embodiments of the present invention, the deodorizing device further includes a fan for introducing gas into the dielectric barrier discharge module and a gas detector for detecting the concentration of ambient odor.

[0027] According to some embodiments of the present invention, the deodorizing device further includes an air duct, the duct wall of which is made of flame-retardant and high-temperature resistant material. The duct has an air inlet and an air outlet. The dielectric barrier discharge module is installed within the duct and located between the air inlet and the air outlet. The cylindrical wall of the grounding electrode is arranged circumferentially along the inner wall of the duct, and the thin film heater is sandwiched between the grounding electrode and the inner wall of the duct. The duct is used to guide air, allowing airflow containing odor molecules to pass through the dielectric barrier discharge module and ultimately exit the duct.

[0028] According to some embodiments of the present invention, the fan is located at the air outlet, and forms a negative pressure in the air duct, sucking in odor molecules, and causing the odor molecules to pass through the dielectric barrier discharge module.

[0029] According to some embodiments of the present invention, the deodorizing device further includes a negative high-voltage pulse power supply for powering the dielectric barrier discharge module. The negative high-voltage pulse power supply provides negative high voltage, adjustable from 0 to 20 kV, with a duty cycle of less than 40%. By setting the duty cycle, the discharge duration is controlled, thereby controlling the concentration of the active substances produced. Pulse discharge can use higher instantaneous high voltage to stimulate more and more efficient active substances, while controlling the concentration of O3 within a reasonable range. Compared with positive polarity high voltage, negative polarity high voltage is more conducive to the generation of negative ions and negative oxygen ions, and has the advantages of stable energy, easy use, and low cost.

[0030] The present invention also proposes a deodorization method based on the deodorization device, comprising the following steps:

[0031] Use gas detectors to monitor environmental odor concentrations in real time;

[0032] When the odor concentration is lower than the first preset value, set the time interval and regularly run the first gear deodorization, and the first gear deodorization is to start the fan alone;

[0033] When the odor concentration is between the first preset value and the second preset value, the deodorization mode is operated at the second gear, wherein the fan and the dielectric barrier discharge module are activated simultaneously; wherein the second preset value is greater than the first preset value;

[0034] When the odor concentration is higher than the second preset value, the 3rd gear deodorization is operated, and the 3rd gear deodorization is to start the fan, dielectric barrier discharge module and thin film heater at the same time.

[0035] The present invention also provides an intelligent toilet, comprising the adsorption catalytic material or the deodorizing device.

[0036] According to one embodiment of the present invention, there are at least the following beneficial effects:

[0037] 1. The adsorption catalytic material of the present invention alternately layers a non-precious metal active layer and a precious metal active layer onto a porous support, each layer performing its respective function without compromising activity. Al2O3 has a porous structure and a large specific surface area, making it suitable for adsorbing odor molecules. Its thermal expansion coefficient is similar to that of the porous support. Mixing Al2O3 with an active agent prior to loading securely bonds the active agent to the porous support, while the Al2O3 also serves to disperse the other components. An inorganic sol is used to bond the components, ensuring they are securely supported on the porous support. Non-precious metal active agents can be selected from at least one of CeO2, tourmaline, CuO, Cu2O, ZnO, or MnO2. CeO2 is an oxygen storage material with excellent redox properties, stabilizing Al2O3 and its degradation products. Tourmaline exhibits pyroelectric properties, permanently and actively releasing negative ions, which can regulate the valence of copper ions. CuO and Cu2O have high selectivity and degradation rates for ammonia-based odor molecules, and the deodorization activity is even higher with the synergistic effect of tourmaline. ZnO has high selectivity and degradation rates for sulfur-based odor molecules. MnO2 can effectively degrade O3, which decomposes to produce active species such as O2 (reactive oxygen species), which effectively remove odor molecules. The appropriate active agent or combination can be selected based on the application scenario. Preferably, all of the above non-precious metal active agents can be used. The combined action of multiple components forms a multifunctional catalytic system that can remove nitrogen, sulfur, and other odors, adapting to complex deodorization environments.

[0038] 2. The adsorption catalytic material, through the active layer formulation and loading structure design, greatly enhances the reactivity of the adsorption catalytic material and increases the number of active reaction sites, making the material deodorize efficiently, quickly, and long-lastingly. The porous carrier and Al2O3 work together to adsorb and collect odor molecules, extending the contact reaction time between odor molecules and the catalytic active material, achieving a highly efficient deodorization effect through adsorption and aggregation followed by catalytic degradation, with a single-pass deodorization rate exceeding 90%.

[0039] 3. The preparation method of the adsorption catalytic material involves directly mixing various metal oxides to form a slurry. The porous support is then impregnated with the slurry, dried, and finally heated and sintered once. Compared to impregnation with a metal salt solution followed by calcination to obtain the corresponding metal oxide, this preparation method makes it easier to control the component ratio, reduces the sintering temperature, and facilitates the introduction of porous Al2O3 into the catalytically active layer. The slurry can also be ball-milled to improve the dispersion of the various components.

[0040] 4. The deodorizing device of the present invention features a dielectric barrier discharge (DBD) module that generates a variety of active substances, such as plasma, which bombards the adsorption catalytic material, removing degradation products and passivation products that accumulate on the surface of the adsorption catalytic material after long-term exposure. Simultaneously, the plasma stimulates the active sites of the adsorption catalytic material, accelerating and enhancing the deodorization and degradation reaction. Furthermore, the DBD module generates O₃, which can directly oxidize and degrade odor molecules. Furthermore, when the adsorption catalytic material contains MnO₂, MnO₂ can efficiently degrade O₃. The degradation of O₃ generates reactive oxygen species and other active radicals, which can also degrade odor molecules.

[0041] 5. The dielectric barrier discharge module preferably adopts a cylindrical discharge structure, which has a simple structure, uniform discharge, a large effective reaction area, and a long contact time to ensure complete degradation reaction.

[0042] 6. The deodorization method of the present invention automatically selects a deodorization gear based on odor concentration. Gear 1 is conventional deodorization mode, requiring only the fan to be activated, allowing odor molecules to be adsorbed and degraded by the adsorption catalytic material. Gear 1 relies solely on the adsorption catalytic material to perform the deodorization function. Gear 2 combines the fan with DBD discharge. In this case, the plasma, O₃, and adsorption catalytic material work synergistically to adsorb and degrade odor molecules, achieving deodorization. Gear 3 combines the fan, DBD discharge, and thin-film heating. High-temperature catalysis, plasma, O₃, and the adsorption catalytic material work synergistically to rapidly heat the adsorption catalytic material. Heat activates the adsorption catalytic material, further activating its activity and enabling faster and more complete deodorization. Heat also enhances the activity of the active substances generated by the DBD, achieving high-intensity deodorization. This deodorization method is intelligent and convenient, enhancing user enjoyment.

[0043] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0045] Figure 1 Schematic diagram of the structure of the adsorption catalytic material of the present invention;

[0046] Figure 2 This is a flow chart of the preparation process of the adsorption catalytic material of the present invention;

[0047] Figure 3 Schematic diagram of the structure of the deodorizing device of the present invention;

[0048] Figure 4 A cross-sectional view of a dielectric barrier discharge module (DBD) of the present invention;

[0049] Figure 5 This is the electrical control operation logic diagram of the deodorizing device of the present invention;

[0050] Figure 6 Schematic diagram of the one-pass removal rate testing device of the present invention. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0052] The present invention provides examples 1-2 and comparative examples 1-4, wherein comparative example 1 is a cordierite honeycomb ceramic without an active layer, and the remaining examples and comparative examples are prepared according to the following method to prepare adsorption catalytic materials (refer to Figure 2 ):

[0053] (1) Ball milling: γ-Al2O3, CeO2, black tourmaline, CuO, Cu2O, ZnO, MnO2 and inorganic sol were mixed according to the proportions in Table 1, and after mixing, an appropriate amount of deionized water was added. The mixture was ball milled on a planetary ball mill until the particle size of the material was less than 1 μm. After ball milling, a first slurry (non-precious metal) was obtained. γ-Al2O3, RuO2, IrO2 and inorganic sol were mixed according to the proportions in Table 1, and after mixing, an appropriate amount of deionized water was added. The mixture was ball milled on a planetary ball mill until the particle size of the material was less than 1 μm. After ball milling, a second slurry (precious metal) was obtained.

[0054] (2) Cyclic ultrasonic impregnation and drying: The first slurry and the second slurry are placed in ultrasonic tanks respectively, and ultrasonic waves are used to promote the mixing and diffusion of the materials. The cordierite honeycomb ceramics are then alternately impregnated in the first slurry and the second slurry, and drying is required after each impregnation. Thus, the "impregnation-drying-impregnation-drying" operation is cyclically performed to obtain a multi-coated impregnated porous carrier.

[0055] (3) Sintering: After the required coating is prepared, the impregnated porous carrier is heated to the sintering temperature at a rate of 10°C / min and then naturally cooled to room temperature to obtain the adsorption catalytic material. The structure of the adsorption catalytic material is as follows: Figure 1 As shown, non-precious metal active layers and precious metal active layers are alternately stacked on a porous support.

[0056] Table 1 shows the formulations and preparation process parameters of each embodiment and comparative example.

[0057]

[0058] A deodorizing device based on dielectric barrier discharge includes a dielectric barrier discharge module, which includes a high-voltage electrode and a ground electrode, with an adsorption catalytic material filled between the high-voltage electrode and the ground electrode. Gas can pass through the adsorption catalytic material.

[0059] In some embodiments of the present invention, the dielectric barrier discharge module has a cylindrical structure, the grounding electrode is a metal tube or metal mesh tube, and the high-voltage electrode is a metal wire or metal rod. The high-voltage electrode is arranged at the central axis inside the grounding electrode. The deodorization device also includes a thin film heater, which is attached to the outer surface of the grounding electrode. Gas enters from one end of the dielectric barrier discharge module, flows through the adsorption catalytic material, and then flows out from the other end of the cylinder. The thin film heater is arranged on the outer surface of the grounding electrode. Under the action of heat, the catalytic activity of the adsorption catalytic material is enhanced, the product is safe, there are no by-products, and the deodorization is faster, more efficient, and more comprehensive. Furthermore, the material of the metal tube or metal mesh tube is one of stainless steel, copper-tungsten alloy, tungsten-molybdenum alloy, or iron-chromium-aluminum alloy. The thin film heater is a commercially available product made of a flexible thin film and can be directly attached to the outer surface of the metal tube or metal mesh tube using thermally conductive adhesive.

[0060] In some embodiments of the present invention, the high voltage electrode is a tungsten filament, which provides negative high voltage electricity to promote air ionization.

[0061] In some embodiments of the present invention, the deodorizing device further includes a fan for introducing gas into the dielectric barrier discharge module and a gas detector for detecting the concentration of ambient odor.

[0062] In some embodiments of the present invention, the deodorizing device further includes an air duct, the duct wall of which is made of flame-retardant and high-temperature resistant material. The duct has an air inlet and an air outlet. The dielectric barrier discharge module is installed within the duct between the air inlet and the air outlet. The cylindrical wall of the grounding electrode is arranged circumferentially along the inner wall of the duct, and the thin film heater is sandwiched between the grounding electrode and the inner wall of the duct. The duct is used to guide air, allowing the airflow containing odor molecules to pass through the dielectric barrier discharge module and ultimately exit the duct.

[0063] In some embodiments of the present invention, a fan is located at the air outlet, which creates a negative pressure in the air duct, sucking in odor molecules and allowing them to pass through the dielectric barrier discharge module.

[0064] In some embodiments of the present invention, the deodorizing device further includes a negative high-voltage pulse power supply for powering the dielectric barrier discharge module. The negative high-voltage pulse power supply provides negative high voltage, adjustable from 0 to 20 kV, with a duty cycle of less than 40%. By setting the duty cycle, the discharge duration is controlled, thereby controlling the concentration of the active substances produced. Pulse discharge can use higher instantaneous high voltage to stimulate more and more efficient active substances, while controlling the concentration of O3 within a reasonable range. Compared with positive polarity high voltage, negative polarity high voltage is more conducive to the generation of negative ions and negative oxygen ions, and has the advantages of stable energy, easy use, and low cost.

[0065] The following is a specific embodiment of the deodorizing device of the present invention (refer to Figure 3-4 ):

[0066] A deodorizing device based on dielectric barrier discharge consists of an air duct, a cylindrical dielectric barrier discharge module, a thin film heater, a fan, a gas detector, a negative high-voltage pulse power supply for supplying power to the dielectric barrier discharge module, and an electronic control system. The dielectric barrier discharge module includes a high-voltage electrode and a grounding electrode. The grounding electrode is a cylindrical mesh made of SUS stainless steel. The high-voltage electrode is a tungsten wire and is arranged at the central axis inside the grounding electrode cylinder mesh. An adsorption catalytic material is filled between the high-voltage electrode and the grounding electrode. The thin film heater is attached to the outer surface of the grounding electrode. The air duct has an air inlet and an air outlet. The dielectric barrier discharge module is installed in the air duct and is located between the air inlet and the air outlet. The fan is located at the air outlet. The cylindrical wall of the grounding electrode is arranged circumferentially along the inner wall of the air duct. The thin film heater is sandwiched between the grounding electrode and the inner wall of the air duct. The wall of the air duct is made of flame-retardant and high-temperature resistant material. The gas detector is located at the air inlet.

[0067] A deodorization method based on the above deodorization device comprises the following steps (refer to Figure 5 ):

[0068] The odor detector monitors the odor concentration at the air inlet of the air duct (inside the toilet cavity) in real time;

[0069] 1. When the odor concentration is less than 5ppm (not in use), set the time interval and run the first gear deodorization regularly. The electronic control system starts the fan, allowing the air with odor molecules to pass through the dielectric barrier discharge module and be adsorbed in the adsorption catalytic material and degraded by the adsorption catalytic material;

[0070] 2. When the odor concentration is 5≤X≤10ppm (urine), the deodorization mode is in gear 2. The electronic control system starts the fan, allowing the air with odor molecules to pass through the dielectric barrier discharge module. At the same time, the electronic control system causes the dielectric barrier discharge module to discharge, generating plasma and active substances such as O3. At this time, the active substances and adsorption catalytic materials work together to adsorb and degrade odor molecules, achieving the deodorization function.

[0071] 3. When the odor concentration is greater than 10ppm (feces), the deodorization mode is operated at level 3. The electronic control system starts the fan to allow the air carrying the odor molecules to pass through the dielectric barrier discharge module, and the dielectric barrier discharge module is turned on to discharge, generating plasma and active substances such as O3. At the same time, the thin film heater is started to rapidly heat up the adsorption catalytic material. Under the action of heat, the activity of the adsorption catalytic material is better activated, and the odor molecules can be degraded faster and more completely. The active substances generated by the dielectric barrier discharge module are also more active with the assistance of heat.

[0072] An intelligent toilet comprises the above-mentioned adsorption catalytic material or deodorizing device.

[0073] Test example

[0074] One-pass removal rate test: One-pass removal rate test device such as Figure 6 As shown, on the basis of the above-mentioned deodorization device, an odor generator is connected at the air inlet, and a gas detector-2 is added near the air outlet. The odor generator continuously generates a certain concentration of odor gas as required. Under the action of the fan, the odor passes through the DBD module at a certain flow rate (2m / s) and flows in the air duct. Gas detector-1 monitors the odor concentration before deodorization, and gas detector-2 monitors the odor concentration after deodorization. When the data of gas detector-1 is stable (fluctuation <0.2ppm), start the test device as required: gear 1, only start the fan; gear 2, start the fan and DBD high-voltage discharge; gear 3, start the fan, DBD high-voltage discharge and thin film heating. 10 minutes after the test device is started, record the gas detector-1 reading at this time, recorded as C 1x , gas detector-2 reading, recorded as C 2x , then the one-pass deodorization rate of the test device under this condition is K=100*(C 1x -C 2x ) / C 1x Table 2 shows the test results of various embodiments and comparative examples.

[0075] Table 2 One-pass removal rate test results

[0076]

[0077] illustrate:

[0078] At gear 1, only the adsorption catalytic material performs a deodorizing function. The composition and ratio of the materials significantly influence the deodorization efficiency of different odor components. For example, in Comparative Example 2, which lacks a precious metal active layer, the deodorization rates for both NH3 and H2S are significantly reduced. Comparative Example 3 lacks the Cu component, which primarily degrades NH3, resulting in a significantly lower NH3 removal rate. Comparative Example 4 lacks ZnO, which primarily degrades H2S, resulting in a significantly lower H2S removal rate.

[0079] When the 2nd and 3rd gears are in operation, the plasma, ozone, atomic oxygen and other active substances generated by the discharge play the main role in deodorization. The composition and ratio of the adsorption catalytic material have relatively little influence on this deodorization process.

[0080] When the 3rd gear is used, the active substances such as plasma, ozone and atomic oxygen generated by discharge still play the main role in deodorization. However, under the action of heat, the catalytic degradation effect of the adsorption catalytic material is enhanced. Therefore, the composition and ratio of the adsorption catalytic material have a certain influence on the deodorization effect of different odor components in this deodorization process.

[0081] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. An application of a deodorizing device based on dielectric barrier discharge, characterized in that: Applied to the deodorization of smart toilets, the deodorization device includes a dielectric barrier discharge module, the dielectric barrier discharge module includes a high-voltage electrode and a grounding electrode, and an adsorption catalytic material is filled between the high-voltage electrode and the grounding electrode; the adsorption catalytic material includes a porous carrier, at least one non-precious metal active layer and at least one precious metal active layer, the non-precious metal active layer and the precious metal active layer are loaded on the porous carrier in an alternating stacking manner, the non-precious metal active layer includes the following raw materials: Al2O3, inorganic sol and non-precious metal active additive, the non-precious metal active additive is CeO2, tourmaline, CuO, Cu2O, ZnO and MnO2; the precious metal active layer includes the following raw materials: Al2O3, inorganic sol and precious metal active additive; the Al2O3 has a porous structure; the preparation method of the adsorption catalytic material includes the following steps: S1: mixing the raw materials of the non-precious metal active layer and adding water to obtain a first slurry; mixing the raw materials of the precious metal active layer and adding water to obtain a second slurry; S2: Alternately immersing the porous support in the first slurry and the second slurry, and drying after each immersion, thereby cyclically performing the "immersion-drying-immersion-drying" operation to obtain an impregnated porous support; S3: heating the impregnated porous carrier to obtain the adsorption catalytic material.

2. The use according to claim 1, characterized in that The noble metal active additives include RuO2 and IrO2.

3. The use according to claim 1, characterized in that The raw materials of the non-precious metal active layer are calculated in the following parts by weight: 20-40 parts of Al2O3, 10-30 parts of inorganic sol, and 27-55 parts of non-precious metal active additive.

4. The use according to claim 1, characterized in that The raw materials of the noble metal active layer are calculated in the following parts by weight: 40-60 parts of Al2O3, 10-30 parts of inorganic sol, and 15-30 parts of noble metal active additive.

5. The use according to claim 1, characterized in that The dielectric barrier discharge module is a cylindrical structure, the grounding electrode is a metal tube or a metal mesh tube, the high-voltage electrode is a metal wire or a metal rod, and the high-voltage electrode is arranged at the central axis inside the grounding electrode. The deodorization device also includes a thin film heater, which is attached to the outer surface of the grounding electrode.

6. The use according to claim 1, characterized in that The deodorizing device further includes a fan for introducing gas into the dielectric barrier discharge module and a gas detector for detecting the concentration of ambient odor.

7. The use according to claim 6, characterized in that The following steps are involved: Use gas detectors to monitor environmental odor concentrations in real time; When the odor concentration is lower than the first preset value, set the time interval and regularly run the first gear deodorization, and the first gear deodorization is to start the fan alone; When the odor concentration is between the first preset value and the second preset value, the deodorization mode is operated at the second gear, wherein the fan and the dielectric barrier discharge module are activated simultaneously; wherein the second preset value is greater than the first preset value; When the odor concentration is higher than the second preset value, the 3rd gear deodorization is operated, and the 3rd gear deodorization is to start the fan, dielectric barrier discharge module and thin film heater at the same time.

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