Purification device and purification apparatus

Abstract

The application discloses a purifying device and a purifying apparatus. The purifying device comprises a heating component and a catalyst layer arranged outside the heating component. The heating component is used to heat the catalyst layer to a preset temperature. The application aims to improve the indoor air purifying efficiency and the safety of the purifying.

Description

Technical Field

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

[0002] Formaldehyde and VOCs are mostly produced by interior decoration materials. Related technologies for treating indoor formaldehyde and VOC pollution typically include two methods: one is using activated carbon filters. Activated carbon filters have a large surface area, resulting in fast adsorption and high purification efficiency. However, their adsorption capacity is limited, and they lose their purification effect after saturation. They also release formaldehyde, causing secondary pollution. The other method is using catalytic filters. Catalytic filters work by having active oxygen adsorbed on the catalyst surface of the filter come into contact with formaldehyde molecules, decomposing them into carbon dioxide and water. The catalyst itself is not consumed, so the catalytic oxidation reaction can be repeated to purify the air. However, the catalyst's activity is poor at room temperature, resulting in low purification efficiency for catalytic filters. Summary of the Invention

[0003] The main objective of this invention is to provide a purification device and apparatus that aims to improve the purification efficiency and safety of formaldehyde.

[0004] To achieve the above objectives, the present invention proposes a purification device comprising a heating element and a catalyst layer disposed on the outside of the heating element, wherein the heating element is used to heat the catalyst layer to a preset temperature.

[0005] In one embodiment of the present invention, the purification device further includes a heat dissipation structure disposed on the outside of the heat-generating component, and the catalyst layer disposed on the surface of the heat dissipation structure.

[0006] 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.

[0007] In one embodiment of the present invention, the thickness of the heat dissipation layer is defined as D1, which satisfies the condition 0.5mm < D1 < 2mm.

[0008] In one embodiment of the present invention, the thickness of the heat sink is defined as D2, satisfying the condition: 0.5mm < D2 < 5mm.

[0009] In one embodiment of the present invention, the distance between two adjacent heat sinks is defined as D3, satisfying the condition: 8 < D3 / D2 < 28.

[0010] In one embodiment of the present invention, the temperature range of the heat dissipation layer is 100~800℃; the temperature range of the heat sink is 50~400℃.

[0011] In one embodiment of the present invention, the catalyst layer comprises one or more of transition metal oxides, rare earth metal oxides, and noble metal oxides.

[0012] In one embodiment of the present invention, the metal element in the transition metal oxide includes Mn, Co or Ni; therefore, the metal element in the rare earth metal oxide includes Ce and La; and the metal element in the noble metal oxide includes Pt and Pd.

[0013] In one embodiment of the present invention, the metal element in the transition metal oxide is Mn, the metal element in the rare earth metal oxide is Ce, and the metal element in the noble metal oxide is Pt.

[0014] In one embodiment of the present invention, the catalyst layer is made by any one or more of the following processes: vapor deposition, electroplating, impregnation, and bonding.

[0015] In one embodiment of the present invention, the thickness of the catalyst layer ranges from 1 to 100 μm.

[0016] In one embodiment of the present invention, the heating element is a high-temperature conductive alloy.

[0017] In one embodiment of the present invention, the high-temperature conductive alloy is an iron-chromium-aluminum or nickel-chromium alloy.

[0018] In one embodiment of the present invention, the surface of the heating element is further provided with an insulating layer, and the catalyst layer is disposed on the outside of the insulating layer.

[0019] In one embodiment of the present invention, the insulating layer is made of magnesium oxide.

[0020] The present invention also provides a purification device, which includes a purification component, the purification component including a heating element and a catalyst layer disposed outside the heating element, the heating element being used to heat the catalyst layer to a preset temperature.

[0021] This invention discloses a purification device comprising a heating element and a catalyst layer disposed outside the heating element. The heating element generates heat, which heats the catalyst layer, causing its temperature to rise and thus making the catalyst highly active in a high-temperature environment. When the purification device is in an environment with air to be purified, formaldehyde molecules and other pollutants released from the environment are adsorbed onto the catalyst layer. The catalyst in the layer is highly active at high temperatures, activating the formaldehyde molecules and making them more reactive. 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. The purification device in this application can heat the catalyst layer, keeping it in a highly active state for a long time, thereby improving the efficiency of formaldehyde purification. Furthermore, because 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

[0022] 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.

[0023] 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 cross-sectional schematic diagram of the heating component in the purification device of the present invention; Figure 3 This is a cross-sectional schematic diagram of the heat sink in the purification device of the present invention.

[0024] Explanation of icon numbers:

[0025] 100. Purification device; 10. Heating component; 11. Insulation layer; 13. Heat dissipation layer; 20. Heat sink; 30. Catalyst layer; 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

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] This invention proposes a purification device 100.

[0031] Reference Figures 1 to 3 The purification device 100 proposed in this invention includes a heating element 10 and a catalyst layer 30 disposed on the outside of the heating element 10. The heating element 10 is used to heat the catalyst layer 30 to a preset temperature.

[0032] This invention discloses a purification device 100 comprising a heating element 10 and a catalyst layer 30 disposed outside the heating element 10. The heating element 10 generates heat, which heats the catalyst layer 30, causing its temperature to rise and thus making the catalyst in the catalyst layer 30 highly active in a high-temperature environment. When the purification device 100 is in an environment of air to be purified, formaldehyde molecules and other substances released in the environment are adsorbed onto the catalyst layer 30. The catalyst in the catalyst layer 30 is highly active at high temperatures, and the formaldehyde molecules are activated under the action of the catalyst, becoming 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. The purification device 100 in this application can heat the catalyst layer 30, keeping it in a highly active state for a long time, thereby improving the efficiency of formaldehyde purification. Furthermore, because 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.

[0033] Understandably, the preset temperature in this embodiment can be understood as the temperature corresponding to the highest catalyst activity. The heating element 10 can generate heat through energy generation or heat up after being energized. The shape of the heating element 10 can be a heating tube, heating wire, or heating plate, etc.

[0034] In one embodiment of the present invention, the heating element 10 is a high-temperature conductive alloy. High-temperature conductive alloys maintain good electrical and thermal conductivity at high temperatures, thus exhibiting high thermal efficiency and enabling rapid heating 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. Preferably, the heating element 10 is iron-chromium-aluminum alloy with good high-temperature oxidation resistance and conductivity, or preferably a nickel-chromium alloy with good high-temperature strength and conductivity.

[0035] Please refer to Figure 2In 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In one embodiment of the present invention, the thickness of the catalyst layer 30 ranges from 1 μm to 100 μm. The thickness of the catalyst layer 30, between 1 μm and 100 μm, ensures sufficient contact between formaldehyde molecules in the environment and the catalyst layer 30.

[0044] Reference Figure 1 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.

[0045] 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.

[0046] Please refer to Figure 2 and Figure 3 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Please refer to Figure 2 In one embodiment of the present invention, the thickness of the heat dissipation layer 13 is defined as D1, which satisfies the condition 0.5mm < D1 < 2mm.

[0051] 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. A thicker heat dissipation layer 13 stores more heat, helping to slow the 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 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 heating element 10 to the catalyst layer 30, the minimum thickness of the heat dissipation layer 13 is greater than 0.5 mm, and the maximum thickness is less than 2 mm. This ensures that the heat dissipation layer 13 has good heat dissipation efficiency, thereby improving the efficiency of the heating element 10 in heating the catalyst layer 30.

[0052] In one embodiment, the heating element 10 is a heating tube, and a heat dissipation layer 13 is wrapped around the outer surface of the heating tube. The thickness of the heat dissipation layer 13 is between 0.5 mm and 2 mm, and the diameter of the heat dissipation layer 13 is between 5 mm and 20 mm. Of course, the diameter of the heat dissipation layer 13 is also 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. Please refer to... Figure 3 In one embodiment of the present invention, the thickness of the heat sink 20 is defined as D2, which satisfies the condition: 0.5mm < D2 < 5mm.

[0053] 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 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 the air and the purification device 100, and ultimately improving the air purification efficiency.

[0054] Please refer to Figure 1 In one embodiment of the present invention, the distance between two adjacent heat sinks 20 is defined as D3, satisfying the condition: 8 < D3 / D2 < 28. In the technical solution of one embodiment of the present invention, by rationally designing the thickness of the heat sink 20 and the gap between two adjacent heat sinks 20, uniform heat transfer is facilitated. When the temperature of the heat sink 20 reaches between 50°C and 400°C, the number of heat sinks 20 can be sufficiently large, resulting in a sufficiently large surface area for the catalyst layer 30 attached to the surface of the heat sink, thereby enabling the purification device 100 to obtain a beneficial catalytic effect.

[0055] 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℃.

[0056] 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.

[0057] 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. The present invention also proposes a purification device, which includes an air duct and a purification device 100. The specific structure of the purification device 100 is as described in the above embodiments. Since this purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the air duct in the purification device is also equipped with a fan, which can accelerate the air flow and further improve the air purification efficiency of the purification device.

[0058] 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, It includes a heating element (10) and a catalyst layer (30) disposed on the outside of the heating element (10), the heating element (10) being used to heat the catalyst layer (30) to a preset temperature.

2. The purification device as described in claim 1, characterized in that, The purification device also includes a heat dissipation structure, which is located on the outside of the heat-generating component (10), and the catalyst layer (30) is located on the surface of the heat dissipation structure.

3. The purification device as described in claim 2, 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).

4. The purification device as described in claim 3, characterized in that, The thickness of the heat dissipation layer (13) is defined as D1, which satisfies the condition 0.5mm < D1 < 2mm.

5. The purification device as described in claim 3, characterized in that, The thickness of the heat sink (20) is defined as D2, which satisfies the condition: 0.5mm < D2 < 5mm.

6. The purification device as described in claim 5, characterized in that, Define the distance between two adjacent heat sinks (20) as D3, satisfying the condition: 8 < D3 / D2 < 28.

7. The purification device as described in claim 3, characterized in that, The temperature range of the heat dissipation layer (13) is 100~800℃; the temperature range of the heat sink (20) is 50~400℃.

8. The purification device as described in claim 1, characterized in that, The catalyst layer (30) includes one or more of transition metal oxides, rare earth metal oxides, and noble metal oxides.

9. The purification device as described in claim 8, characterized in that, The metal elements in the transition metal oxides include Mn, Co, or Ni; therefore, the metal elements in the rare earth metal oxides include Ce and La; and the metal elements in the noble metal oxides include Pt and Pd.

10. The purification device as described in claim 9, characterized in that, The metal element in the transition metal oxide is Mn, the metal element in the rare earth metal oxide is Ce, and the metal element in the noble metal oxide is Pt.

11. The purification device as described in claim 10, characterized in that, The catalyst layer (30) is made by any one or more of the following processes: vapor deposition, electroplating, impregnation, and bonding.

12. The purification device as described in claim 1, characterized in that, The thickness of the catalyst layer (30) ranges from 1 to 100 μm.

13. The purification device according to any one of claims 1 to 12, characterized in that, The heating element (10) is a high-temperature conductive alloy.

14. The purification device as described in claim 13, characterized in that, The high-temperature conductive alloy is an iron-chromium-aluminum or nickel-chromium alloy.

15. The purification device as described in claim 13, characterized in that, The surface of the heating element (10) is also provided with an insulating layer (11), and the catalyst layer (30) is provided on the outside of the insulating layer (11).

16. The purification device as described in claim 15, characterized in that, The insulating layer (11) is made of magnesium oxide.

17. A purification device, characterized in that, Includes the purification device as described in any one of claims 1 to 16.

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