Purification device

Abstract

The application discloses a purification device air duct component and a purification device. The air duct component has an air inlet and an air outlet. The purification device is arranged in the air duct component. The purification device comprises a heating component and a catalyst layer arranged outside the heating component. The heating component is used for heating the catalyst layer. The air duct component is used for guiding air from the air inlet, purifying the air via the purification device, and sending the air out from the air outlet. The technical scheme of the application improves indoor air purification efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to a purification device. Background Technology

[0002] In related technologies, there are generally two methods for dealing with indoor formaldehyde pollution. One method is to use activated carbon filters to purify indoor formaldehyde. Activated carbon filters have a large surface area, fast adsorption speed, and high purification efficiency. However, the adsorption capacity of activated carbon filters is limited, and they lose their purification effect after saturation. At the same time, there is also the possibility of releasing formaldehyde and causing secondary pollution. The other method is to use catalytic filters to purify indoor formaldehyde. The working principle of catalytic filters is that the active oxygen adsorbed on the surface of the catalyst on the filter comes into contact with formaldehyde molecules and decomposes them into carbon dioxide and water. The catalyst itself is not consumed, so it can repeatedly carry out catalytic oxidation reactions to achieve the purpose of purifying the air. However, the activity of the catalyst is poor at room temperature, resulting in low purification efficiency of catalytic filters. Summary of the Invention

[0003] The main objective of this invention is to provide a purification device that is safe and efficient for air purification.

[0004] To achieve the above objectives, the purification device proposed in this invention includes: Air duct components, having air inlets and air outlets; A purification device is disposed within the air duct component. The purification device includes a heating element and a catalyst layer disposed outside the heating element. The heating element is used to heat the catalyst layer. The air duct component is used to introduce air from the air inlet, and after being purified by the purification device, it is sent out from the air outlet.

[0005] In one embodiment of the present invention, a fan is further provided inside the air duct component, and the purification device is located between the fan and the air outlet.

[0006] In one embodiment of the present invention, the temperature of the purification device is T1; When the fan is in operation, the temperature of the purification device is T2, which satisfies condition 1.5. <T1 / T2<5。

[0007] In one embodiment of the present invention, the temperature at the air outlet is defined as T3, which satisfies the condition: 30℃ < T3 < 100℃.

[0008] In one embodiment of the present invention, a heat dissipation structure is further provided on the outer side of the heating component, and the catalyst layer is disposed on the surface of the heat dissipation structure.

[0009] In one embodiment of the present invention, the heating element has a length direction, the heat dissipation structure includes a heat dissipation layer, the heat dissipation layer is disposed on the surface of the heating element, and the catalyst layer is disposed on the surface of the heat dissipation layer; And / or, the heat dissipation structure includes a plurality of heat sinks, each of which is connected to the heat-generating component and is evenly distributed at intervals along the length of the heat-generating component, and the catalyst layer is disposed on the surface of the heat sink.

[0010] In one embodiment of the present invention, the number of heat sinks is greater than 20.

[0011] In one embodiment of the present invention, the distance between two adjacent heat sinks is defined as D, satisfying the condition: 0.5mm≤D≤1.5mm.

[0012] In one embodiment of the present invention, the minimum distance between the end of the heat sink and the air outlet is defined as a, satisfying the condition: 5cm≤a≤7cm.

[0013] In one embodiment of the present invention, the active metal oxide catalyst includes one or more of transition metal oxides, rare earth metal oxides, or noble metal oxides.

[0014] In one embodiment of the present invention, the metal element in the transition metal oxide includes Mn, Co or Ni; the metal element in the rare earth metal oxide includes Ce or La; and the metal element in the noble metal oxide includes Pt or Pd.

[0015] This invention discloses a purification device, including an air duct component and a purification device. The air duct component has an air inlet and an air outlet. The purification device is disposed within the air duct component and includes a heating element and a catalyst layer disposed outside the heating element. The heating element is used to heat the catalyst layer. Because the heating element in this application can generate heat and heat the catalyst layer disposed outside the heating element, the temperature of the catalyst layer rises, thereby making the catalyst in the catalyst layer highly active in a high-temperature environment. When the purification device is working, the air duct component is used to introduce air through the air inlet, which is then purified by the purification device and sent out through the air outlet. Formaldehyde molecules and other substances in the air are adsorbed onto the catalyst layer. The catalyst in the catalyst layer is highly active at high temperatures, and the formaldehyde molecules are activated under the action of the catalyst, making them more active. The activated formaldehyde molecules undergo an oxidation-reduction reaction on the catalyst surface, decomposing into harmless substances and desorbing from the catalyst layer. This allows the catalyst layer surface to continue adsorbing new formaldehyde molecules, thus continuing the next round of catalytic reaction. Because the purification device in this application can generate heat, it can heat the catalyst layer, keeping the catalyst layer in a highly active state for a long time, thereby improving the efficiency of formaldehyde purification. Furthermore, since the catalyst decomposes the adsorbed formaldehyde molecules into harmless substances, it prevents formaldehyde from being released back into the environment and causing secondary harm, thus improving the safety of air purification. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the purification device of the present invention; Figure 2 This is a schematic diagram of the structure of an embodiment of the purification device of the present invention; Figure 3 This is a cross-sectional schematic diagram of the heating component in the purification device of the present invention; Figure 4 This is a cross-sectional schematic diagram of the heat sink in the purification device of the present invention.

[0018] Explanation of icon numbers:

[0019] 1000, Purification device; 100, Purification component; 10, Heating element; 11, Insulation layer; 13, Heat dissipation layer; 20, Heat sink; 30, Catalyst layer; 200, Air duct component; 210, Air inlet; 220, Air outlet; 300, Fan; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] This invention proposes a purification device 1000.

[0025] Reference Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of an embodiment of the purification device 1000 of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the purification device 100. Figure 3 This is a cross-sectional schematic diagram of the heating element 10 in the purification device 100 of the present invention; Figure 4 This is a cross-sectional schematic diagram of the heat sink 20 in the purification device 100 of the present invention.

[0026] The purification device 1000 proposed in this invention includes: an air duct component 200 and a purification device 100, wherein the air duct component 200 has an air inlet 210 and an air outlet 220; Purification device 100 is disposed within the air duct component 200. The purification device 100 includes a heating element 10 and a catalyst layer 30 disposed outside the heating element 10. The heating element 10 is used to heat the catalyst layer 30. The air duct component 200 is used to introduce air from the air inlet 210, and after being purified by the purification device 100, it is sent out from the air outlet 220.

[0027] This invention discloses a purification device 1000, comprising an air duct component 200 and a purification device 100. The air duct component 200 has an air inlet 210 and an air outlet 220. The purification device 100 is disposed within the air duct component 200 and includes a heating element 10 and a catalyst layer 30 disposed outside the heating element 10. The heating element 10 is used to heat the catalyst layer 30. Because the heating element 10 in this application can generate heat and heat the catalyst layer 30 disposed outside the heating element 10, the temperature of the catalyst layer 30 rises, thereby enabling the catalyst in the catalyst layer 30 to have high activity in a high-temperature environment. When the purification device 1000 is working, the air duct component 200 introduces air through the air inlet 210, and after being purified by the purification device 100, it is sent out through the air outlet 220. Formaldehyde molecules and other substances in the air are adsorbed onto the catalyst layer 30. The catalyst in the catalyst layer 30 has high activity at high temperatures, and the formaldehyde molecules are activated under the action of the catalyst, making them more active. The activated formaldehyde molecules undergo an oxidation-reduction reaction on the catalyst surface, decomposing into harmless substances and desorbing from the catalyst layer 30. This allows the surface of the catalyst layer 30 to continue adsorbing new formaldehyde molecules, thus continuing the next round of catalytic reaction. Because the purification device 100 in the purification device 1000 of this application can generate heat, it can heat the catalyst layer 30, allowing the catalyst layer 30 to remain in a highly active state for a long time, thereby improving the efficiency of formaldehyde purification. Furthermore, since the catalyst decomposes the adsorbed formaldehyde molecules into harmless substances, it avoids the re-release of formaldehyde into the environment and the resulting secondary harm, thus improving the safety of air purification.

[0028] Understandably, the air duct component 200 can serve as the housing of the air purification device 1000. The air duct in the air duct component 200 can be arranged in a straight line, that is, the air inlet 210 and the air outlet 220 can be arranged opposite each other; the air duct in the air duct component 200 can also be arranged in an arc, etc., as long as it is a component that can introduce air from the air inlet 210 and deliver it from the air outlet 220. The air duct component 200 can also protect the purification device 100.

[0029] Reference Figure 1 In one embodiment of the present invention, the air duct component 200 is further provided with a fan 300, and the purification device 100 is located between the fan 300 and the air outlet 220.

[0030] In the technical solution of this embodiment, the fan 300 can accelerate the air flow, thereby further improving the contact efficiency between formaldehyde molecules in the air and the catalyst layer 30, and enhancing the purification efficiency of formaldehyde. Among them, the fan 300 can be a cross-flow impeller with a diameter less than 15 cm, making the volume of the entire purification device 1000 small and convenient for movement. Of course, the cross-flow impeller can also be reasonably set according to the structure of the purification device 1000.

[0031] It can be understood that the greater the air volume, the better the formaldehyde removal effect; and the higher the temperature, the better the formaldehyde removal effect. However, the faster the wind speed, the faster the heat on the purification device 100 will dissipate, resulting in a lower temperature on the purification device 100.

[0032] In an embodiment of the present invention, the temperature of the purification device 100 is T1; When the fan 300 is in the working state, the temperature of the purification device 100 is T2, satisfying the condition: 1.5 < T1 / T2 < 5.

[0033] When the fan 300 is in the non-working state, under the action of the heating component 10, the temperature of the purification device 100 is T1, and when the fan 300 is in the working state, the temperature of the purification device 100 is T2. When the ratio of T1 to T2 satisfies the condition: 1.5 < T1 / T2 < 5, the purification device 1000 can obtain a formaldehyde purification rate greater than 80%.

[0034] Assume that the wind speed at the air outlet 220 is F, and the formaldehyde purification rate per hour is denoted as C; the data between the wind speed at the air outlet 220, the ratio of T1 / T2, and the formaldehyde purification rate C are shown in the following table:

[0035] As can be seen from the table, when the ratio of T1 to T2 is greater than 1.5 and less than 5, and the wind speed at the air outlet 220 is greater than 1 m / s, a formaldehyde purification rate greater than 80% can be obtained. When the wind speed is 0.5 m / s and the ratio of T1 to T2 is 1.1, the formaldehyde purification rate is only 70%; that is When the ratio is less than 1.5, the air volume is too small and the purification efficiency is low. When the ratio is greater than 5, the temperature of the purification device 100 is too low, which is also not conducive to formaldehyde purification. A balance between the two is required.

[0036] In an embodiment of the present invention, it is defined that the temperature at the air outlet 220 is T3, satisfying the condition: 30°C < T3 < 100°C.

[0037] In the technical solution of this embodiment, by setting the temperature of the air outlet 220 of the purification device 1000 between 30°C and 100°C, the purification device 1000 in this solution can not only be used as a purification device, but also as a heater, thereby improving the practicality of the purification device 1000.

[0038] Reference Figures 2 to 4 In one embodiment of the present invention, the purification device 100 further includes a heat dissipation structure, which is disposed on the outside of the heat-generating component 10, and the catalyst layer 30 is disposed on the surface of the heat dissipation structure.

[0039] In one embodiment of the present invention, a heat dissipation structure is used to rapidly dissipate the heat generated by the heating element 10. The heat dissipation structure can be wrapped around the surface of the heating element 10 in the form of a heat dissipation layer 13, or it can be connected to the heating element 10 in the form of a heat dissipation component. The heat dissipation structure has good thermal conductivity and can quickly and evenly dissipate the heat generated by the heating element 10, thereby enabling the heat generated by the heating element 10 to be quickly transferred to the catalyst layer 30, thereby achieving rapid heating of the catalyst layer 30.

[0040] Please refer to Figures 2 to 4 In one embodiment of the present invention, the heating element 10 has a length direction, the heat dissipation structure includes a heat dissipation layer 13, the heat dissipation layer 13 is disposed on the surface of the heating element 10, and the catalyst layer 30 is disposed on the surface of the heat dissipation layer 13; And / or, the heat dissipation structure includes a plurality of heat sinks 20, each of which is connected to the heat-generating component 10 and is evenly distributed at intervals along the length of the heat-generating component 10, and the catalyst layer 30 is disposed on the surface of the heat sink 20.

[0041] In one embodiment of the present invention, the heat dissipation structure is a heat dissipation layer 13 wrapped around the surface of the heat-generating component 10. The heat dissipation layer 13 can be made of an alloy, graphene, or carbon nanotubes. The cross-sectional shape of the heat dissipation layer 13 is the same as the interface shape of the heat-generating component 10. The heat dissipation layer 13 has good thermal conductivity and can quickly and uniformly transfer the heat generated by the heat-generating component 10 to the catalyst layer 30.

[0042] In another embodiment of the present invention, the heat dissipation structure consists of a plurality of heat sinks 20. The plurality of heat sinks 20 and the heat-generating component 10 can be fixed by means of welding or riveting. The heat sinks 20 can be made of metal or alloy. The heat sinks 20 have a large heat dissipation area, which can increase the efficiency of heat transfer and conduction on the one hand, and increase the surface area of ​​the purification device 100 on the other hand, thereby increasing or decreasing the area of ​​the purification device 100 in contact with the air, thereby improving the purification efficiency.

[0043] It should be noted that the purification device 100 may contain both a heat dissipation layer 13 and a heat sink 20, which can be reasonably configured according to the structure of the purification device 100.

[0044] In one embodiment of the present invention, the number of heat sinks 20 is greater than 20. This allows for a larger number of heat sinks 20, thereby increasing the total surface area of ​​the catalyst layer 30 on the surface of the purification device 100, thus increasing the contact rate between formaldehyde molecules and the catalyst layer 30, and improving the purification effect on formaldehyde.

[0045] In one embodiment of the present invention, the minimum distance between the end of the heat sink 20 and the air outlet 220 is defined as a, satisfying the condition: 5cm≤a≤7cm.

[0046] In this embodiment, by placing the heat sink 20 near the air outlet 220, it is beneficial to control the temperature at the air outlet 220.

[0047] In one embodiment of the present invention, the thickness of the heat dissipation layer 13 directly affects its thermal resistance, heat capacity, and thermal diffusion parameters. Understandably, under certain conditions, the thicker the heat dissipation layer 13, the greater the thermal resistance, and the slower the heat transfer rate through the heat dissipation layer 13. Furthermore, a thicker heat dissipation layer 13 stores more heat, helping to slow the rate of temperature rise. The thickness of the heat dissipation layer 13 also affects the diffusion of heat within the material; a thicker layer increases the time it takes for heat to diffuse within the material, thus affecting heat dissipation efficiency. To ensure that the heat dissipation layer 13 can quickly conduct the heat generated by the heat-generating component 10 to the catalyst layer 30, the thickness of the heat dissipation layer 13 must be designed to meet the requirements.

[0048] In one embodiment, the heating element 10 is a heating tube, and the heat dissipation layer 13 is wrapped around the outer surface of the heating tube. The diameter of the heat dissipation layer 13 is affected by the diameter of the heating tube. For example, the larger the diameter of the heating tube, the larger the diameter of the heat dissipation layer 13.

[0049] Please refer to Figure 3 In one embodiment of the present invention, the thickness of the heat sink 20 is defined as D, which satisfies the condition: 0.5mm < D < 1.5mm.

[0050] In one embodiment of the present invention, the thickness of the heat sink 20 affects not only its thermal resistance, heat capacity, and thermal diffusion parameters, but also its strength, the total number of heat sinks 20, the gap between adjacent heat sinks 20, the surface area of ​​the purification device 100, the airflow velocity through the purification device 100, and the air purification efficiency. To ensure the overall surface area and purification effect of the purification device 100, the minimum thickness of the heat dissipation layer 13 is greater than 0.5 mm, and the maximum thickness is less than 1.5 mm. This ensures high strength and a large number of heat sinks 20, ensuring a large total surface area for the entire air purification device 100, thereby ensuring a high contact rate between air and the purification device 100 and improving air purification efficiency.

[0051] In one embodiment of the present invention, the thickness of the heat sink 20 and the gap between adjacent heat sinks 20 are reasonably designed. For example, the ratio of the distance between two heat sinks 20 to the thickness of the heat sink 20 is greater than 8 and less than 28. This facilitates uniform heat transfer. When the temperature of the heat sink 20 reaches between 50°C and 400°C, the number of heat sinks 20 can be sufficient to ensure that the surface area of ​​the catalyst layer 30 attached to the heat sink is large enough, thereby enabling the purification device 100 to obtain a beneficial catalytic effect.

[0052] In one embodiment of the present invention, the temperature range of the heat dissipation layer 13 is 100~800℃; the temperature range of the heat sink 20 is 50~400℃.

[0053] In one embodiment of the present invention, since the heat dissipation layer 13 is directly attached to the outer surface of the heat-generating component 10, its contact area with the heat source is large and the distance is short, resulting in a high temperature, reaching between 100°C and 800°C. Because the contact area between the heat sink 20 and the heat-generating component 10 is relatively small, and its temperature decreases after heat is dissipated through the heat sink 20, the temperature of the heat sink 20 is slightly lower than that of the heat dissipation layer 13, reaching between 50°C and 400°C. This configuration ensures that the temperature in each area of ​​the purification device 100 can effectively activate the catalyst in the catalyst layer 30, ensuring that the catalyst layer 30 has high activity.

[0054] Please refer to Figure 1In one embodiment of the present invention, the heating element has a length direction extending along the length direction of the purification device 100, and the number of heating elements is two. The two heating elements are spaced apart along the width direction of the purification device 100. Several heat dissipation elements are connected to the two heating elements in a crisscross pattern. In this way, the temperature in several air purification zones formed by adjacent heat dissipation elements and heating elements is relatively uniform. In one embodiment, the temperature range in each air purification zone is 80°C to 600°C, which is beneficial to ensuring the purification effect on formaldehyde. In one embodiment of the present invention, the heating element 10 is a high-temperature conductive alloy. The high-temperature conductive alloy can maintain good electrical and thermal conductivity at high temperatures, thereby giving it high thermal efficiency and enabling it to be rapidly heated to a preset temperature in a short time. The high-temperature conductive alloy can be nickel-chromium alloy (NiCr), Kanthal alloy, iron-chromium-aluminum alloy (FeCrAl), tungsten, molybdenum and their alloys, copper-nickel alloy (CuNi), nickel-cobalt alloy (NiCo), etc. The heating element 10 is preferably an iron-chromium-aluminum alloy with good high-temperature oxidation resistance and conductivity, or the heating element 10 is preferably a nickel-chromium alloy with good high-temperature strength and conductivity.

[0055] Please refer to Figure 2 In one embodiment of the present invention, an insulating layer 11 is further provided on the surface of the heating element 10, and the catalyst layer 30 is disposed on the outside of the insulating layer 11. In the technical solution of one embodiment of the present invention, by providing an insulating layer 11 to wrap the heating element 10, it is convenient to provide a heat dissipation structure outside the heating element 10. Since an insulating layer 11 is provided, the range of materials for the heat dissipation structure can be expanded. For example, the heat dissipation structure can also be made of metal or alloy material with good thermal conductivity. The material of the insulating layer 11 can be magnesium oxide, which has excellent electrical insulation and high temperature resistance and is often used for surface insulation of electric heating tubes. Of course, the material of the insulating layer 11 can also be polytetrafluoroethylene (PTFE, Teflon), which has excellent chemical stability, or lightweight and high temperature resistant materials such as ceramic fiber.

[0056] In one embodiment of the present invention, the catalyst layer 30 includes one or more of transition metal oxides, rare earth metal oxides, and noble metal oxides.

[0057] In one embodiment of the present invention, the catalyst in the catalyst layer 30 can be a transition metal oxide. Transition metals include manganese (Mn), copper (Cu), iron (Fe), nickel (Ni), cobalt (Co), and their oxides, which can be used as catalysts for formaldehyde oxidation. Transition metals are readily available, highly active, and have good application prospects. Among them, metallic manganese (Mn) is a more ideal transition metal catalyst.

[0058] The catalysts in catalyst layer 30 also include noble metals, such as platinum (Pt), palladium (Pd), and rhodium (Rh). These noble metal catalysts can effectively catalyze the oxidation of formaldehyde at high temperatures, but they are expensive and less applicable than transition metal catalysts. Among them, platinum (Pt) is the most ideal noble metal catalyst.

[0059] The catalyst in catalyst layer 30 also includes rare earth metals and their oxides, such as cerium (Ce), lanthanum (La), europium (Eu), which can improve its photocatalytic activity and enhance its ability to decompose formaldehyde.

[0060] It can be understood that the catalyst in the catalyst layer 30 can be formed by doping with one or more of transition metals and their oxides, rare earth metals and their oxides, or noble metals and their oxides. Anything that can accelerate the formaldehyde decomposition reaction and thus increase the reaction rate is acceptable.

[0061] Furthermore, the catalyst layer 30 can be fabricated using one or more of the following processes: vapor deposition, electroplating, impregnation, and bonding. The key is to ensure that the catalyst layer 30 can be attached to the surface of the heat-generating or heat-dissipating device.

[0062] In one embodiment, the catalyst in the catalyst layer 30 is a manganese-based catalyst. The manganese-based catalyst is a solid solution and has good thermal stability, so that the manganese-based catalyst is not easy to collapse under high temperature conditions. For example, it can effectively degrade formaldehyde even in an environment of 100℃~400℃, and can maintain catalytic activity continuously to achieve the purpose of long-term formaldehyde degradation.

[0063] In one embodiment of the present invention, the thickness of the catalyst layer 30 is in the range of 1 μm to 100 μm. The thickness of the catalyst layer 30, being between 1 μm and 100 μm, ensures sufficient contact between formaldehyde molecules in the environment and the catalyst layer 30.

[0064] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A purification device, characterized in that, include: The air duct component (200) has an air inlet (210) and an air outlet (220). A purification device (100) is disposed within the air duct component (200). The purification device (100) includes a heating element (10) and a catalyst layer (30) disposed outside the heating element (10). The heating element (10) is used to heat the catalyst layer (30). The air duct component (200) is used to introduce air from the air inlet (210) and send it out from the air outlet (220) after being purified by the purification device (100).

2. The purification device as described in claim 1, characterized in that, The air duct component (200) is also equipped with a fan (300), and the purification device (100) is located between the fan (300) and the air outlet (220).

3. The purification device as described in claim 2, characterized in that, The temperature of the purification device (100) is T1; When the fan (300) is in operation, the temperature of the purification device (100) is T2, which satisfies condition 1.

5. <T1 / T2<5。 4. The purification device as described in claim 3, characterized in that, The temperature at the air outlet (220) is defined as T3, which satisfies the condition: 30℃ < T3 < 100℃.

5. The purification device as described in claim 1, characterized in that, A heat dissipation structure is also provided on the outside of the heating component (10), and the catalyst layer (30) is provided on the surface of the heat dissipation structure.

6. The purification device as described in claim 5, characterized in that, The heating element (10) has a length direction, and the heat dissipation structure includes a heat dissipation layer (13), the heat dissipation layer (13) is disposed on the surface of the heating element (10), and the catalyst layer (30) is disposed on the surface of the heat dissipation layer (13). And / or, the heat dissipation structure includes a plurality of heat sinks (20), each of which is connected to the heat-generating component (10) and is evenly distributed at intervals along the length of the heat-generating component (10), and the catalyst layer (30) is disposed on the surface of the heat sinks (20).

7. The purification device as described in claim 6, characterized in that, The number of heat sinks (20) is greater than 20.

8. The purification device as described in claim 6, characterized in that, The distance between two adjacent heat sinks (20) is defined as D, which satisfies the condition: 0.5mm≤D≤1.5mm.

9. The purification device as described in claim 6, characterized in that, The minimum distance between the end of the heat sink (20) and the air outlet (220) is defined as a, satisfying the condition: 5cm≤a≤7cm.

10. The purification device according to any one of claims 1 to 9, characterized in that, The active metal oxide catalyst includes one or more of transition metal oxides, rare earth metal oxides, or noble metal oxides.

11. The purification device as described in claim 10, characterized in that, The metal elements in the transition metal oxide include Mn, Co, or Ni; the metal elements in the rare earth metal oxide include Ce and La; and the metal elements in the noble metal oxide include Pt and Pd.

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