DBD synergistic catalytic purification device

Abstract

The application relates to a DBD synergic catalytic purification device, which comprises a power supply for converting an input voltage into two-way output, which is divided into a first output end and a second output end; a heating type DBD discharge assembly which comprises a heating substrate and a discharge substrate connected in one body; the heating substrate is communicated with the first output end and is used for generating heat to conduct to the discharge substrate; the discharge substrate is communicated with the second output end and is used for generating ozone through dielectric barrier discharge; and a catalyst is used for catalytically oxidizing target gas by using ozone. The application can stably work in a low-temperature and refrigeration environment, realizes elimination of odor gas in the low-temperature and refrigeration environment, and has small volume and simple structure.

Description

Technical Field

[0001] This invention relates to the field of purification technology, and in particular to a DBD synergistic catalytic purification device. Background Technology

[0002] Unpleasant odors inside refrigerators are a common problem that bothers consumers. Currently, the most common odor elimination technologies are physical adsorption and chemical catalytic oxidation. Physical adsorption has a short lifespan, requiring frequent replacement and resulting in a poor user experience. Chemical catalytic oxidation utilizes the reaction of odor gases and oxygen on the catalyst surface to degrade the odor gases, offering high efficiency and a long lifespan. However, the difficulty of catalytic oxidation in low-temperature and freezing environments limits the further application of this technology in refrigerators. Summary of the Invention

[0003] In view of this, the present invention provides a DBD synergistic catalytic purification device that can work stably in low-temperature and freezing environments, eliminate odorous gases in low-temperature and freezing environments, and is small in size and simple in structure.

[0004] This invention is achieved through the following technical solution:

[0005] A DBD synergistic catalytic purification device includes: a power supply for converting the input voltage into two outputs, namely a first output terminal and a second output terminal; a heated DBD discharge component including a heating substrate and a discharge substrate connected together; the heating substrate is connected to the first output terminal for generating heat that is conducted to the discharge substrate; the discharge substrate is connected to the second output terminal for dielectric barrier discharge to generate ozone; and a catalyst for using ozone to catalytically oxidize the target gas.

[0006] Furthermore, the discharge substrate is made of insulating material. The end face of the discharge substrate that abuts against the heating substrate is provided with a discharge conductive coating I, and the end face of the discharge substrate facing away from the heating substrate is provided with a discharge conductive coating II. A first discharge pad and a second discharge pad are provided on the side of the heating substrate facing away from the discharge substrate. A through hole I is provided at a position corresponding to the heating substrate and the first discharge pad, and a through hole II is provided at a position corresponding to the heating substrate and the second discharge pad. A through hole is provided at a position corresponding to the discharge substrate and the through hole II. The discharge conductive coating I slurry overflows into the through hole I and connects to one pole of the second output terminal through the first discharge pad. The discharge conductive coating II overflows from the through hole into the through hole II and connects to the other pole of the second output terminal through the second discharge pad.

[0007] Furthermore, the heating substrate is made of insulating material, and a heating resistor and a heating resistor pad are connected to the side of the heating substrate away from the discharge substrate. The first output terminal is connected to the heating resistor through the heating resistor pad.

[0008] Furthermore, both the discharge substrate and the heating substrate are made of alumina ceramic material.

[0009] Furthermore, the first output terminal outputs 5-12V DC; the second output terminal outputs 1-10kV AC.

[0010] Furthermore, the discharge substrate and the heating substrate are stacked at high temperature to form an integrated structure.

[0011] Furthermore, the catalyst is a porous ceramic support loaded with metal oxides.

[0012] Furthermore, it also includes a mounting housing, which is divided into a first chamber and a second chamber that are interconnected; the power supply is located in the first chamber, and the heated DBD discharge component is located at the connection between the first chamber and the second chamber, wherein the side of the heating substrate with the heating resistor faces the first chamber; the catalyst is located in the second chamber, and the second chamber is connected to the external target gas.

[0013] Compared with existing technologies, the beneficial effects of this invention are:

[0014] 1. This invention utilizes ozone generated by a discharge substrate to replace oxygen for catalytic oxidation, significantly reducing the activation energy of the reaction; and the heating substrate can generate heat that can be conducted to the discharge substrate, effectively solving the technical problems of low efficiency and difficulty in starting traditional catalytic oxidation technology in low temperature and freezing environments, and achieving efficient and stable purification in freezing environments.

[0015] 2. The two discharge conductive coatings of the discharge substrate of the present invention are respectively connected to the discharge pads on the heating substrate through through holes. At the same time, the heating resistor and the heating resistor pad are set on the side of the heating substrate away from the discharge substrate. The heating substrate faces the power supply and the discharge substrate faces the catalyst. The structure is compact, has good insulation, is easy to assemble and electrically connect, and improves the reliability and production efficiency of the device.

[0016] 3. This invention adopts a high-temperature stacking and integrated molding process, which makes the heating substrate and the discharge substrate firmly bonded and has high heat conduction efficiency, ensuring that heat can be quickly conducted to the discharge substrate in a low-temperature environment, thus ensuring stable ozone generation; and by using a housing to implement a compartmentalized layout, the power supply, discharge components and catalyst are set up in separate areas, which not only ensures electrical safety, but also optimizes the airflow path, improving purification efficiency and safety of use.

[0017] 4. The catalyst of this invention uses a porous ceramic support to support metal oxides, which has the advantages of large specific surface area, high activity and long life, further enhancing the low-temperature catalytic oxidation effect and meeting the needs of long-term use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the heated DBD discharge component of the present invention.

[0020] Figure 3 This is a schematic diagram of the discharge substrate structure of the present invention.

[0021] Among them, 1-mounting housing, 2-power supply, 3-heated DBD discharge component, 4-catalyst, 5-heating substrate, 6-discharge substrate, 7-heating resistor, 8-heating resistor pad, 9-discharge substrate pad, 10-discharge conductive coating. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] This invention provides a DBD synergistic catalytic purification device, such as... Figure 1 As shown, the purification device includes a housing 1, a power supply 2, a heated DBD discharge component 3, and a catalyst 4, wherein DBD (Dielectric Barrier Discharge) is a dielectric barrier discharge.

[0024] The mounting housing 1 is used to install the power supply 2, the heated DBD discharge assembly 3, and the catalyst 4. The mounting housing 1 is divided into a first chamber and a second chamber that are interconnected. The power supply 2 is located in the first chamber, the heated DBD discharge assembly 3 is located at the connection between the first and second chambers, and the catalyst 4 is located in the second chamber, which is connected to the outside air. The first chamber is filled with epoxy resin to enhance insulation.

[0025] Power supply 2 is used to convert the input voltage (5-12V DC) into two outputs, namely a first output terminal and a second output terminal; the first output terminal outputs 5-12V DC; the second output terminal outputs 1-10kV AC.

[0026] The heated DBD discharge assembly 3 includes a heating substrate 5 and a discharge substrate 6 connected together. The heating substrate 5 is connected to a first output terminal and is used to generate heat that is conducted to the discharge substrate 6; the discharge substrate 6 is connected to a second output terminal and is used to generate ozone through dielectric barrier discharge.

[0027] Catalyst 4 is a porous ceramic support loaded with metal oxides, used for the catalytic oxidation of the target gas using ozone. In this embodiment, the porous structure is disposed on two sides of catalyst 4, and the second chamber and the sidewalls corresponding to these two sides are provided with vent holes to communicate with the external target gas, or the two ends of the second chamber and the two sides corresponding to these two sides are open to communicate with the external target gas.

[0028] In this embodiment, the heated DBD discharge component 3 has a flat plate structure. Both the discharge substrate 6 and the heating substrate 5 have flat plate structures and are made of insulating material, preferably alumina ceramic material. The discharge substrate 6 and the heating substrate 5 are formed into an integral structure by high-temperature stacking.

[0029] like Figure 3 As shown, the end face of the discharge substrate 6 that abuts against the heating substrate 5 and the end face of the discharge substrate 6 that faces away from the heating substrate 5 are both coated with a discharge conductive coating 10. The discharge conductive coating 10 is divided into discharge conductive coating I and discharge conductive coating II; wherein, the end face of the discharge substrate 6 that abuts against the heating substrate 5 is provided with discharge conductive coating I, and the end face of the discharge substrate 6 that faces away from the heating substrate 5 is provided with discharge conductive coating II. The discharge conductive coatings 10 are all made of slurry material and are hardened after high-temperature stacking; wherein... Figure 3 The W-shaped curve is only for illustrative purposes of the discharge conductive coating 10.

[0030] The discharge conductive coating 10 of the discharge substrate 6 is connected to the second output terminal of the power supply 2 through the discharge substrate pad 9. The discharge substrate pad 9 is disposed on the heating substrate 5, and the discharge substrate pad 9 and the discharge substrate 6 are respectively located on both sides of the heating substrate 5.

[0031] The discharge substrate pad 9 is divided into a first discharge pad that communicates with the discharge conductive coating I and a second discharge pad that communicates with the discharge conductive coating II. The first and second discharge pads are located on the side of the heating substrate 5 away from the discharge substrate 6, and this side faces the first chamber for easy connection to the power supply. The discharge substrate 6 faces the second chamber for easy ozone catalytic reaction.

[0032] A through-hole I is provided at the position corresponding to the first discharge pad on the heating substrate 5, and a through-hole II is provided at the position corresponding to the second discharge pad on the heating substrate 5. A through-hole is provided at the position corresponding to the through-hole II on the discharge substrate 6. The discharge conductive coating I slurry overflows into the through-hole I and connects to one of the poles of the second output terminal through the first discharge pad; the discharge conductive coating II overflows into the through-hole II and connects to the other pole of the second output terminal through the second discharge pad. After connection, the discharge conductive coating I and discharge conductive coating II dielectric barrier discharge generate ozone, which is used for catalytic oxidation.

[0033] Preferably, the through hole and the through hole II are coaxial and of equal diameter to ensure that the discharge conductive coating II will not overflow from the through hole onto the end face where the discharge substrate 6 and the heating substrate 5 abut.

[0034] The heating substrate 5 generates heat through the heating resistor 7. The heating resistor 7 is attached to the side of the heating substrate 5 facing away from the discharge substrate 6, and is connected to the first output terminal via heating resistor pads 8. The heating resistor pads 8 are divided into a first heating pad and a second heating pad, both located on the side of the heating substrate 5 facing away from the discharge substrate 6 and on opposite sides of the heating resistor 7, i.e., the heating resistor pads 8 face the first chamber. The first heating pad and the second heating pad are respectively connected to the two poles of the first output terminal, allowing the heat generated by the heating resistor 7 to be conducted to the discharge substrate 6, ensuring that the discharge substrate 6 remains stable and reliable even in freezing environments.

[0035] In this embodiment, as Figure 2 As shown, the heating resistor 7 and its two heating resistor pads 8 are located in the lower half of the heating substrate 5, and the discharge substrate pad 9 is located in the upper half of the heating substrate 5; and the heating resistor pads 8 are sealed with sealant. The first output terminal of the power supply 2 is connected to a low-voltage output harness, which is soldered to the heating resistor pad 8; the second output terminal of the power supply 2 is connected to a high-voltage output harness, which is soldered to the discharge substrate pad 9.

[0036] The heated DBD discharge component 3 of this invention generates stable ozone, which replaces oxygen to achieve catalytic oxidation. This significantly reduces the activation energy of the reaction, thereby lowering the reaction temperature and improving the catalytic oxidation efficiency. In addition, the discharge substrate 6 and the heating substrate 5 are sintered into one piece, and the heat from the heating substrate 5 can be quickly conducted to the discharge substrate 6, ensuring stable ozone production under low temperature and freezing conditions, and achieving highly efficient catalytic oxidation under low temperature and freezing conditions. Moreover, the product has a simple structure, small size, and strong adaptability for installation.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A DBD synergistic catalytic purification device, characterized in that, include: The power supply is used to convert the input voltage into two outputs, which are divided into a first output terminal and a second output terminal. A heated DBD discharge assembly includes a heating substrate and a discharge substrate connected together, wherein the discharge substrate and the heating substrate are stacked at high temperature to form an integrated structure; The heating substrate is connected to the first output terminal to generate heat that is conducted to the discharge substrate; The discharge substrate is connected to the second output terminal for dielectric barrier discharge to generate ozone. Catalyst, used to catalytically oxidize target gases using ozone; The mounting housing is divided into a first chamber and a second chamber that are interconnected. The power supply is located in the first chamber, and the heated DBD discharge component is located at the connection between the first chamber and the second chamber. The side of the heating substrate with the heating resistor faces the first chamber. The catalyst is located in the second chamber, which is connected to the target gas in the outside.

2. The DBD synergistic catalytic purification device as described in claim 1, characterized in that, The discharge substrate is made of insulating material. The end face of the discharge substrate that abuts against the heating substrate is provided with a discharge conductive coating I, and the end face of the discharge substrate that is away from the heating substrate is provided with a discharge conductive coating II. A first discharge pad and a second discharge pad are provided on the side of the heating substrate away from the discharge substrate; a through hole I is provided at the position corresponding to the heating substrate and the first discharge pad, a through hole II is provided at the position corresponding to the heating substrate and the second discharge pad, and a through hole is provided at the position corresponding to the discharge substrate and the through hole II; The discharge conductive coating Ⅰ slurry overflows into the through hole Ⅰ and connects to one of the poles of the second output terminal through the first discharge pad; the discharge conductive coating Ⅱ overflows from the through hole into the through hole Ⅱ and connects to the other pole of the second output terminal through the second discharge pad.

3. The DBD synergistic catalytic purification device as described in claim 2, characterized in that, The heating substrate is made of insulating material. A heating resistor and a heating resistor pad are connected to the side of the heating substrate away from the discharge substrate. The first output terminal is connected to the heating resistor through the heating resistor pad.

4. The DBD synergistic catalytic purification device as described in claim 3, characterized in that, Both the discharge substrate and the heating substrate are made of alumina ceramic.

5. The DBD synergistic catalytic purification device as described in any one of claims 1-4, characterized in that, The first output terminal outputs 5-12V DC; the second output terminal outputs 1-10kV AC.

6. The DBD synergistic catalytic purification device as described in any one of claims 1-4, characterized in that, The catalyst is a porous ceramic support loaded with metal oxides.

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