Formaldehyde removal filter screen for wall-mounted air conditioner

Abstract

The invention relates to the field of air purification, in particular to a formaldehyde removal filter screen for a wall-mounted air conditioner, which comprises a filter screen body, the filter screen body is provided with a carrier with holes and air permeability, the carrier is coated or loaded with normal-temperature formaldehyde removal catalyst particles, the periphery of the filter screen body is surrounded by a frame structure, and the filter screen body is adaptive to the horizontal projection size of a return air inlet of a commercially available wall-mounted air conditioner. The bottom of the frame structure is provided with an anti-skid buffer portion used for supporting the filter screen body to be horizontally placed at an air return opening above the wall-mounted air conditioner, the carrier can be of a macroporous net structure and the like, the catalyst comprises a specific crystal structure and an auxiliary, black yarn protection nets and the like are arranged on the two sides of the carrier, and the frame structure is provided with a specific material and a clamping groove. The technical effects that the formaldehyde can be effectively decomposed, the device is matched with a mainstream wall-mounted air conditioner return air inlet, placement is stable, and the device can be conveniently applied to a wall-mounted air conditioner to achieve air purification are achieved.

Description

Technical Field

[0001] This application relates to the field of air purification equipment technology, and in particular to a formaldehyde removal filter for wall-mounted air conditioners. Background Technology

[0002] Indoor formaldehyde pollution has become a significant factor affecting human health. With increasing public awareness of indoor air quality, the field of air purification technology has developed rapidly. Good indoor air quality contributes to human health and improves comfort and quality of life. Therefore, solving the problem of indoor formaldehyde pollution is of great importance to protecting people's living and working environments.

[0003] To address indoor formaldehyde pollution, existing formaldehyde removal solutions mainly include the following: One is using a stand-alone air purifier, a device specifically designed to purify the air. It removes formaldehyde and other pollutants through a built-in filtration system and purification technology. Another is integrating a formaldehyde removal module into the air conditioner. This involves modifying the air conditioner to integrate formaldehyde removal functionality into the system, allowing it to remove formaldehyde while regulating temperature. A third method involves using adsorption filters, such as activated carbon filters. These filters utilize the adsorption properties of activated carbon to adsorb formaldehyde molecules from the air onto the filter, thus removing the formaldehyde.

[0004] However, these existing formaldehyde removal solutions have significant drawbacks. Standalone air purifiers require separate purchase, occupy indoor space, and have a limited purification range, only purifying the surrounding localized air. Air conditioner-built-in formaldehyde removal modules require modification of the air conditioner, are complex to install, usually require professional installation, and are costly. Furthermore, these modules are only compatible with specific brands and models of air conditioners, lacking versatility. Adsorption filters, such as activated carbon filters, require frequent replacement, resulting in high long-term operating costs, and are also prone to secondary pollution due to adsorption saturation. Summary of the Invention

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide a formaldehyde removal filter for wall-mounted air conditioners.

[0006] A formaldehyde removal filter for wall-mounted air conditioners includes a filter body, the filter body comprising an open and breathable carrier; formaldehyde removal catalyst particles coated or loaded on the filter body at room temperature; a frame structure surrounding the filter body, the frame structure being adapted to the horizontal projection size of the return air vent of a commercially available wall-mounted air conditioner; and an anti-slip buffer portion disposed at the bottom of the frame structure for supporting the filter body to be placed horizontally above the return air vent of the wall-mounted air conditioner.

[0007] By adopting the above technical solution, the formaldehyde removal catalyst particles at room temperature can catalytically decompose formaldehyde into CO2 and H2O at room temperature, without secondary pollution and without consumption of the catalyst itself, achieving long-term effective formaldehyde removal; the frame structure is adapted to the horizontal projection size of the return air vent of commercially available wall-mounted air conditioners, so that the filter can be adapted to the return air vent of mainstream brand wall-mounted air conditioners; the anti-slip buffer part can horizontally support the filter body at the upper return air vent position of the wall-mounted air conditioner, and use the suction of the air conditioner return air vent to make the air flow through the filter, without the need to disassemble the air conditioner or drill holes for fixing, achieving an installation-free design.

[0008] Preferably, the carrier is a macroporous mesh structure, a honeycomb structure, or a porous sponge structure.

[0009] By adopting the above technical solutions, carriers with large-pore mesh structures, honeycomb structures, or porous sponge structures have high air permeability, which can reduce wind resistance and is suitable for high-speed air conditioning operation scenarios. In addition, the three-dimensional mesh structure of porous sponge structure can increase the air contact area, and also make the filter adaptable to different application scenarios and reflect the diversity of materials, thereby improving its structural adaptability and scenario universality.

[0010] Preferably, the formaldehyde removal catalyst particles at room temperature are loaded onto the carrier by a sol-gel method or an impregnation method.

[0011] By adopting the above technical solution, formaldehyde removal catalyst particles at room temperature can be stably loaded onto a breathable carrier, enabling the filter to catalytically decompose formaldehyde into CO2 and H2O at room temperature without secondary pollution. Furthermore, the catalyst itself is not consumed, achieving long-term effective formaldehyde removal. At the same time, this loading method helps to ensure the uniform distribution of the catalyst on the carrier, thereby improving the formaldehyde removal performance of the filter.

[0012] Preferably, the formaldehyde removal catalyst particles at room temperature have a crystal structure of δ-MnO2 and contain alkali metal and transition metal additives, wherein the molar ratio of the alkali metal to Mn is 0.1-0.25, and the transition metal additive is one or more of cobalt and cerium.

[0013] By adopting the above technical solution, the filter can catalytically decompose formaldehyde into CO2 and H2O at room temperature, avoiding secondary pollution. Moreover, the catalyst itself is not consumed, and it can achieve long-term effective formaldehyde removal. It also has the ability to remove microorganisms. Catalysts with different alkali metal to Mn molar ratios have a significant improvement in formaldehyde removal efficiency and dirt holding capacity compared with ordinary activated carbon adsorption solutions, ensuring the filter's high-efficiency formaldehyde removal capability.

[0014] Preferably, both sides of the carrier are provided with black mesh protective netting.

[0015] By adopting the above technical solution, the filter body uses an open and breathable carrier to ensure air circulation; formaldehyde removal catalyst particles are coated or loaded onto it at room temperature, which can catalytically decompose formaldehyde into CO2 and H2O at room temperature, without secondary pollution and without catalyst consumption, achieving long-term effective formaldehyde removal; the frame structure is set around the outer perimeter of the filter body and is adapted to the horizontal projection size of the return air vent of commercially available wall-mounted air conditioners, with strong universality, without needing to distinguish between air conditioner brands and models; the anti-slip buffer part is set at the bottom of the frame structure, which can support the filter body to be placed horizontally above the return air vent of the wall-mounted air conditioner, making installation convenient. In addition, black mesh protective netting is set on both sides of the carrier surface to prevent filter material leakage.

[0016] Preferably, a filter screen is provided on the outer surface of the black mesh protective net.

[0017] By adopting the above technical solution, the filter body includes a breathable carrier and formaldehyde removal catalyst particles at room temperature. It can catalytically decompose formaldehyde into CO2 and H2O at room temperature, without secondary pollution and without catalyst consumption, achieving long-term effectiveness. The frame structure is adapted to the return air vent size of commercially available wall-mounted air conditioners and can be used with mainstream brand wall-mounted air conditioners. The anti-slip buffer part can support the filter body to be placed horizontally above the return air vent of the air conditioner. Black mesh protective nets on both sides of the carrier can prevent filter material leakage. A filter net is set on the outside of the black mesh protective net to further enhance the filtration effect.

[0018] Preferably, the frame structure is made of engineering plastic or metal, and has a slot on the inside for fixing the filter body.

[0019] By adopting the above technical solutions, the use of engineering plastics or metal materials for the frame structure can ensure structural strength and durability, and the inner slots can fix the filter body to prevent the filter from shaking or shifting, so that the filter can play a more stable role in removing formaldehyde.

[0020] Preferably, the groove depth of the frame structure matches the thickness of the filter body.

[0021] By adopting the above technical solution, the filter body can be firmly fixed in the slot of the frame structure, ensuring the stability of the overall structure of the filter and making it less prone to loosening or displacement during use, thereby ensuring the stable performance of its formaldehyde removal function.

[0022] Preferably, the anti-slip buffer includes at least one magnetic adsorption element or elastic pad.

[0023] By adopting the above technical solution, the filter body can be magnetically attached to the metal casing of the air conditioner top through the anti-slip buffer part, or prevented from sliding and scratching the air conditioner casing through elastic pads, thus stably placing it horizontally above the return air vent of the wall-mounted air conditioner; at the same time, combined with the perforated and breathable carrier of the filter body, and the coated or loaded room-temperature formaldehyde removal catalyst particles, the air drawn in by the air conditioner return air vent can flow through the filter, and the room-temperature formaldehyde removal catalyst particles can catalytically decompose formaldehyde into CO2 and H2O at room temperature; coupled with a frame structure that matches the horizontal projection size of the return air vent of commercially available wall-mounted air conditioners, the filter can be adapted to use with a variety of commercially available wall-mounted air conditioners.

[0024] Preferably, the outer dimensions of the frame structure cover the width and length specifications of mainstream wall-mounted air conditioner return air inlets.

[0025] By adopting the above technical solution, the filter can be adapted to the return air vent size of mainstream wall-mounted air conditioners, improving the filter's adaptability, eliminating the need to modify the air conditioner, and expanding the product's application range.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. It uses formaldehyde removal catalyst particles at room temperature, which can catalytically decompose formaldehyde into CO2 and H2O at room temperature without secondary pollution. The catalyst itself is not consumed, achieving long-term effectiveness and reducing long-term use costs. 2. The frame structure's external dimensions are adapted to the horizontal projection dimensions of the return air vents of commercially available wall-mounted air conditioners, covering the width and length specifications of mainstream wall-mounted air conditioner return air vents, making it highly universal and eliminating the need to distinguish between air conditioner brands and models; 3. The filter can be placed horizontally above the air return vent of the air conditioner. The air will flow through the filter using the suction force of the air return vent. There is no need to disassemble the air conditioner or drill holes for fixing. The installation is convenient and does not require professional operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a formaldehyde removal filter for a wall-mounted air conditioner in an embodiment of this application.

[0028] Figure 2 This is an exploded schematic diagram of a formaldehyde removal filter for a wall-mounted air conditioner, as described in an embodiment of this application.

[0029] Figure 3 This is an installation diagram of a formaldehyde removal filter for a wall-mounted air conditioner, as described in an embodiment of this application.

[0030] Explanation of reference numerals in the attached diagram: 1. Filter body; 11. Carrier; 12. Formaldehyde removal catalyst particles at room temperature; 13. Black mesh protective net; 14. Filter; 2. Wall-mounted air conditioner. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.

[0032] Please see Figure 1-3 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this application and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this application, should still fall within the scope of the technical content disclosed in this application. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application's implementation.

[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0034] This embodiment discloses a formaldehyde removal filter for wall-mounted air conditioners.

[0035] Example 1

[0036] Reference Figure 1 , Figure 2 and Figure 3 The formaldehyde removal filter for wall-mounted air conditioners provided in this application includes a filter body 1, formaldehyde removal catalyst particles 12 at room temperature, a frame structure, and an anti-slip buffer. The formaldehyde removal catalyst particles 12 at room temperature are loaded on the filter body 1, the frame structure is arranged around the outer periphery of the filter body 1, and the anti-slip buffer is arranged at the bottom of the frame structure, so that the filter can be stably placed at the return air vent of the wall-mounted air conditioner to purify the air containing formaldehyde. Through this structural combination, the formaldehyde removal catalyst particles at room temperature can fully contact the flowing air and catalyze the decomposition of formaldehyde, and the frame and anti-slip buffer ensure the stability and adaptability of the filter installation.

[0037] Specifically, the filter body 1 includes a perforated and breathable carrier 11. The carrier 11 can be a large-pore mesh structure, such as a corrugated aluminum mesh with a peak height of 15mm (mesh diameter 8×16mm). This corrugated structure increases the contact area between air and the catalyst, improving purification efficiency. It can also be a honeycomb structure of metal, whose regular honeycomb channels facilitate air circulation and diffusion. Alternatively, it can be a porous sponge structure, such as one with a thickness of 16mm and a density of 25kg / m³. 3Polyurethane foam with an open porosity greater than 85% provides a large specific surface area due to its abundant pore structure. Both sides of the carrier 11 are covered with black mesh 13, which prevents filter material leakage. The mesh is typically made of a mesh material with certain strength and corrosion resistance, such as polyester fiber mesh, although nylon mesh can also be used. A filter screen 14 is also provided on the outer surface of the black mesh 13. The filter screen 14 further filters large particulate impurities in the air and protects the catalyst. The filter screen 14 can be a non-woven fabric filter or a glass fiber filter.

[0038] The specific combination logic and effects of these components are as follows: the carrier 11 provides the basic structure for catalyst loading, and its open and breathable characteristics ensure smooth airflow; the black mesh screen 13 prevents leakage of filter materials such as catalysts, ensuring the stability and reliability of the filter screen; the outer filter screen 14 pre-treats the air, reducing the impact of large particulate impurities on the catalyst. These three components work together to form a complete front-end structure for air filtration and purification, providing favorable conditions for subsequent formaldehyde decomposition.

[0039] Specifically, the formaldehyde removal catalyst particles 12 at room temperature are loaded onto a support via a sol-gel method or an impregnation method. Taking the sol-gel method as an example, a sol containing catalyst components is first prepared, and then the support is immersed in the sol. After drying and calcination, the catalyst is uniformly loaded onto the surface or porous structure of the support 11. The impregnation method involves immersing the support in a solution containing catalyst components, allowing the catalyst components to be adsorbed onto the support. The formaldehyde removal catalyst particles 12 at room temperature have a crystal structure of δ-MnO2 type and contain alkali metal and transition metal additives. The molar ratio of alkali metal to Mn is 0.1-0.25, and the transition metal additive is one or more of cobalt and cerium. In actual preparation, following the method of Preparation Example 1, 15.8 g of KMnO4 is dissolved in 500 mL of water as the first solution, and 322.2 g of 50 wt% manganese nitrate solution is taken as the second solution. The two solutions are added concurrently to a high-pressure reactor, and the stirring paddle is turned on simultaneously. After reacting for a period of time, potassium citrate and cobalt nitrate are added as auxiliary agents, and the reaction continues. The reaction is then carried out, followed by aging, acid etching, washing and filtration, drying, calcination, and granulation to obtain the catalyst. At this point, the alkali metal is K, and the molar ratio of K to Mn is 0.1. Of course, the raw material ratio and reaction conditions can also be adjusted according to the methods of other preparation examples to obtain catalysts with different properties.

[0040] The reasons for the combined effects of these catalyst preparation and properties are described as follows: The δ-MnO2 crystal structure possesses unique catalytic active sites, enabling efficient catalytic decomposition of formaldehyde at room temperature; the addition of alkali metal and transition metal promoters further optimizes the catalyst's performance, improving its catalytic activity and stability. Sol-gel and impregnation methods allow for uniform loading of the catalyst onto the support, increasing the contact area between the catalyst and air, thereby improving the efficiency of formaldehyde decomposition.

[0041] Specifically, the frame structure surrounds the outer perimeter of the filter body 1, and its material is engineering plastic or metal. If engineering plastic is used, ABS engineering plastic can be selected, as it has good strength and toughness and good processing performance; if metal is used, aluminum alloy, such as 6061 aluminum alloy, can be selected, as it is lightweight and corrosion-resistant. The inner side of the frame structure has a slot for fixing the filter body 1, and the depth of the slot matches the thickness of the filter body, ensuring that the filter body 1 is securely installed within the frame. For example, when the carrier 11 is a corrugated aluminum mesh, the depth of the slot on the inner side of the frame can be set to 15mm, which is just enough to accommodate the corrugated aluminum mesh. The outer dimensions of the frame structure cover the width and length specifications of mainstream wall-mounted air conditioner return air inlets, with common frame lengths ranging from 50cm to 120cm and widths from 10cm to 40cm, thus adapting to wall-mounted air conditioners 2 from different brands such as Gree, Midea, and Haier.

[0042] The specific description of the combination logic and effect of these frame structure components is as follows: Appropriate material selection ensures the strength and durability of the frame structure; the slot design allows the filter body 1 to be firmly fixed inside the frame, preventing it from shaking or shifting. The shape design, adapted to the return air vent size of mainstream wall-mounted air conditioners 2, ensures that the filter can be widely used in various wall-mounted air conditioners, improving the product's versatility and applicability.

[0043] Specifically, the anti-slip buffer is located at the bottom of the frame structure, including at least one magnetic adsorption component or elastic pad. The magnetic adsorption component can be a neodymium magnet, such as four neodymium magnets with a size of D8X4mm fixed inside both sides of the frame, which can be adsorbed onto the metal casing of the top of the air conditioner, suitable for mainstream brands such as Gree and Midea with metal panels; the elastic pad can be a silicone pad or a rubber pad, or it can be an EVA foam sponge, such as two strips of EVA foam sponge with a width of 12mm and a thickness of 3mm, distributed along the short side of the bottom of the frame, with a Leeb hardness of 20, which can prevent the filter from sliding and avoid scratching the air conditioner casing.

[0044] The specific description of the combination logic and effect of the anti-slip buffer components is as follows: The magnetic adsorption component is magnetically attached to the metal casing of the wall-mounted air conditioner 2, providing a stable fixing force for the filter; the elastic pad, through its own elasticity and friction, prevents the filter from sliding during air conditioner operation and also acts as a buffer to avoid damage to the air conditioner casing. Together, they ensure the stable placement of the filter at the air conditioner's return air vent.

[0045] The implementation principle of this embodiment is as follows: The formaldehyde removal filter for wall-mounted air conditioners in this embodiment achieves compatibility and stable installation with the return air vent of the wall-mounted air conditioner through a reasonable structural design and material selection. During use, the air drawn in by the air conditioner's return air vent flows through the filter body. Formaldehyde in the air first undergoes preliminary filtration through the outer filter to remove large particulate impurities, and then enters the carrier area, where it comes into full contact with the room-temperature formaldehyde removal catalyst particles loaded thereon. Under the action of the catalyst, formaldehyde is catalytically decomposed into CO2 and H2O at room temperature, thereby achieving the purpose of air purification. The entire process requires no modification to the air conditioner, is easy to install, and because the catalyst itself is not consumed, its theoretical lifespan can reach 3-6 years. Compared with traditional adsorption filters, it has advantages such as safety and environmental friendliness, long-term low cost, and strong universality, effectively solving the problems existing in current formaldehyde removal solutions and providing an effective solution for improving indoor air quality.

[0046] Example 2

[0047] The difference between this embodiment and the previous one is that the anti-slip buffer section uses multiple elastic rubber suction cups. These elastic rubber suction cups are evenly distributed at the bottom of the frame structure. By pressing the suction cups, air is expelled, allowing them to adhere tightly to the air conditioner casing, providing stable support and fixation for the filter. The elastic rubber suction cups have good elasticity and adhesion properties, can adapt to the surface of air conditioner casings of different materials, and will not damage the air conditioner casing during the adhesion process. In addition, when the filter is not in use, the suction cups can be released with a gentle pull, making it convenient to remove and store the filter.

[0048] The implementation principle of this embodiment is as follows: An elastic rubber suction cup is used as an anti-slip buffer, utilizing its excellent adsorption capacity and elasticity to provide a reliable way to fix the filter. During air conditioning operation, even when affected by airflow, the filter can be stably held at the return air vent position by the suction cup, ensuring that air can flow normally through the filter for purification. Simultaneously, the detachable nature of the elastic rubber suction cup makes filter installation and removal more convenient and quick, allowing users to adjust the filter's usage status as needed. This anti-slip buffering method not only improves the stability and practicality of the filter but also further enhances the user experience and expands the product's flexibility. Compared to traditional anti-slip buffering methods, it has significant advantages and better meets the actual usage needs of users.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A formaldehyde removal filter for wall-mounted air conditioners, characterized in that, The filter includes a filter body, which includes a porous and breathable carrier; formaldehyde removal catalyst particles coated or loaded on the filter body at room temperature; a frame structure surrounding the filter body, the frame structure being adapted to the horizontal projection size of the return air vent of a commercially available wall-mounted air conditioner; and an anti-slip buffer portion located at the bottom of the frame structure for supporting the filter body to be placed horizontally above the return air vent of the wall-mounted air conditioner.

2. The formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The carrier is a macroporous mesh structure, a honeycomb structure, or a porous sponge structure.

3. The formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The formaldehyde removal catalyst particles at room temperature are loaded onto the carrier using a sol-gel method or an impregnation method.

4. The formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The formaldehyde removal catalyst particles at room temperature have a crystal structure of δ-MnO2 and contain alkali metal and transition metal additives. The molar ratio of the alkali metal to Mn is 0.1-0.25, and the transition metal additive is one or more of cobalt and cerium.

5. A formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: Both sides of the carrier are covered with black mesh protective netting.

6. A formaldehyde removal filter for wall-mounted air conditioners according to claim 5, characterized in that: A filter screen is provided on the outer surface of the black mesh protective net.

7. A formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The frame structure is made of engineering plastic or metal, and has a slot on the inside for fixing the filter body.

8. A formaldehyde removal filter for wall-mounted air conditioners according to claim 7, characterized in that: The groove depth of the frame structure matches the thickness of the filter body.

9. A formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The anti-slip buffer includes at least one magnetic adsorption element or elastic pad.

10. A formaldehyde removal filter for wall-mounted air conditioners according to claim 1, characterized in that: The external dimensions of the frame structure cover the width and length specifications of mainstream wall-mounted air conditioner return air inlets.

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