An air purifying agent, a method for preparing the same, and an air purifying device

Abstract

The present application relates to an air purifying agent, a preparation method thereof and an air purifying device, and belongs to the technical field of air purifying agents. The air purifying agent device is composed of a medicine core, a dust filter cloth and a frame. The air purifying agent is integrally formed by a porous material with a porosity of 30% to 60%, and has a honeycomb beam cavity array structure. The honeycomb beam cavity array structure is composed of a plurality of hollow columnar structures with a regular hexagonal cross section and open at both ends, which are closely and vertically arranged in parallel. The porous material is prepared by using a foaming process with absorbent powder and fibers as raw materials. The absorbent powder is at least one of LiOH, NaOH and Ca(OH)2. The mass of the absorbent powder is 90% to 99.5% of the total mass of the raw materials. The air purifying agent has good carbon dioxide absorption characteristics and noise reduction effect, and has stable structure, high firmness, and is convenient for transportation and storage.

Description

Technical Field

[0001] This invention relates to an air purifier, its preparation method, and an air purification device, specifically to a carbon dioxide absorbent for purifying air in enclosed spaces, belonging to the technical field of air purifiers. Background Technology

[0002] Carbon dioxide removal in confined spaces is a critical task of environmental control and life support systems. In confined spaces such as manned spacecraft, space stations, refuge chambers, deep-sea stations, and submarines, excessively high carbon dioxide concentrations can cause functional impairments in humans, and in severe cases, organ failure and death. Physical properties such as density, viscosity, specific heat capacity, and volatility are important indicators for determining whether a material can serve as a carbon dioxide absorbent; while the chemical properties of the carbon dioxide absorbent, such as chemical reaction rate, degradation characteristics, and heat of reaction, play a decisive role in the operation and energy consumption of the entire carbon dioxide absorption system.

[0003] In practical applications, an air-driven unit is used to propel airflow through the carbon dioxide absorbent, ensuring that the absorbent fully absorbs the carbon dioxide generated in the enclosed space. However, traditional carbon dioxide absorbents, primarily composed of particulate matter, exhibit significant aerodynamic resistance, resulting in aerodynamic noise. Therefore, developing an air purifier that guarantees good air purification capabilities while also possessing excellent noise reduction effects, high economic efficiency, and environmental friendliness is of guiding significance for the chemical absorption of carbon dioxide. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, one of the objectives of this invention is to provide an air purifier that has good carbon dioxide absorption characteristics and noise reduction effect, and is structurally stable, strong and durable, and easy to transport and store.

[0005] The second objective of this invention is to provide a method for preparing an air purifier;

[0006] A third objective of this invention is to provide an air purification device, wherein the core of the device is the air purifying agent described in this invention; the air purification device has a stable structure and is easy to transport and store.

[0007] To achieve the objectives of this invention, the following technical solutions are provided.

[0008] An air purifier is integrally pressed from a porous material with a porosity of 30% to 60% and has a honeycomb cavity array structure; the honeycomb cavity array structure is composed of several hollow columnar structures with regular hexagonal cross-sections and open ends, arranged closely in parallel along the vertical direction;

[0009] The porous material is prepared using absorbent powder and fiber as raw materials through a foaming process.

[0010] The absorbent powder is at least one of LiOH, NaOH, and Ca(OH)2; the mass of the absorbent powder is 90% to 99.5% of the total mass of the raw materials.

[0011] Preferably, in the honeycomb cavity array structure, the honeycomb wall thickness of each honeycomb cavity is 1mm to 3mm, the diameter of the inscribed circle of the honeycomb hole is 0.5mm to 5mm, the axial relative roughness of the hollow columnar channel of the honeycomb cavity is 0.12 to 0.25, and the circumferential relative roughness is 0.12 to 0.25.

[0012] Preferably, the fiber is at least one selected from polyvinyl alcohol fiber, polyethylene fiber, polyester fiber, polypropylene fiber, and polyamide fiber; the mass of the absorbent powder is 95% to 98% of the total mass of the raw materials.

[0013] A method for preparing the air purifier according to the present invention, the method comprising the following steps:

[0014] (1) The absorbent powder and fiber are mixed evenly to obtain a dry mixture;

[0015] (2) Add water to the dry mixture obtained in step (1) and stir evenly to obtain a wet mixture; the mass of water added is 10% to 20% of the mass of the wet mixture;

[0016] (3) Add the diluted foaming agent to the wet mixture obtained in step (2) and stir at low speed to obtain a paste-like foamed mixture;

[0017] The low-speed stirring speed is 200 r / min to 500 r / min, and the stirring time is ≥2 min;

[0018] Dilute the foaming agent with water, the dilution ratio is 30 to 50 times;

[0019] (4) Press and demold the paste-like foamed mixture obtained in step (3) in one go to obtain an air purifier with a honeycomb cavity structure.

[0020] Preferably, the foaming agent is at least one selected from sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, and tetradecyl dimethyl betaine; the mass of the foaming agent is 0.3% of the mass of the wet mixture.

[0021] An air purification device is provided, comprising a core, a dust filter cloth, and a frame; wherein the core is the air purifier of the present invention, the dust filter cloth covers the surfaces of the openings at both ends of the honeycomb array structure of the air purifier, and the frame is fixedly installed outside the core, covering and supporting the core.

[0022] Preferably, the dust filter cloth is a non-woven fabric with a thickness of 1mm to 3mm, which has good permeability and can effectively isolate dust particles; the frame is made of metal.

[0023] Beneficial effects

[0024] (1) The present invention provides an air purifier having a honeycomb cavity structure. The honeycomb structure has strong stability, which can improve the firmness of the agent and facilitate handling. The air purifier material is a porous medium, which has good carbon dioxide absorption characteristics and can greatly reduce the flow resistance of the airflow, thereby reducing the power consumption of the equipment. Moreover, when the sound wave passes through the narrow space of the cavity, it repeatedly oscillates and dissipates in the cavity and foam gap. By utilizing the cavity coupling resonance and the sound absorption and dissipation principle of porous materials, the sound energy is converted into heat energy, attenuating the sound wave, increasing the sound absorption coefficient and sound impedance, and at the same time widening its sound absorption frequency band, thus having a good noise reduction effect.

[0025] (2) The present invention provides an air purifier. The number and size of the honeycomb cavity channels inside the air purifier affect the porosity of the material. Changing the porosity can adjust the impedance characteristics, sound absorption frequency band and sound absorption coefficient of the overall structure. The porosity of the air purifier of the present invention is 30% to 60%. The air purifier with such porosity exhibits good structural stability and sound absorption performance.

[0026] (3) The present invention provides a method for preparing an air purifier. The method has simple process steps and is easy to mass-produce and industrialize. In the method, a foaming process is adopted, in which a foaming agent diluted 30 to 50 times is added to a wet mixture and stirred at a low speed of 200 r / min to 500 r / min for more than 2 minutes to obtain a paste-like foamed mixture. The speed can enable the foaming agent to generate bubbles fully and retain more of the generated bubbles inside the mixture, thereby improving the uniformity and abundance of the bubble pores inside the agent.

[0027] (4) The present invention provides an air purification device, which is composed of a core, a dust filter cloth and a frame; wherein the core is the air purifying agent of the present invention; the air purification device has a stable structure, and the dust filter cloth has good permeability and can effectively isolate dust particles, making it convenient for transportation and storage. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an air purification device according to the present invention;

[0029] Figure 2 This is a top view of an air purification device according to the present invention;

[0030] Figure 3 This is a schematic diagram of the honeycomb cross-section of the medicated core in the air purification device of the present invention;

[0031] Among them, 1-dust filter cloth, 2-countersunk screw, 3-core, 4-frame, 5-bubble hole. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments. Unless otherwise specified, the methods described are conventional methods, and the raw materials described are obtainable from publicly available commercial sources.

[0033] Example 1

[0034] An air purification device is provided, the device being cuboid in shape and comprising a core 3, a dust filter cloth 1, and a frame 4; wherein, the core 3 is the air purifier described in this embodiment, and is generally cuboid in shape; the dust filter cloth 1 is a non-woven fabric with a thickness of 1mm, which covers the surfaces of the openings at both ends of the honeycomb array structure of the air purifier; the frame 4 is made of stainless steel, and is fixedly connected by countersunk screws 2, and is installed outside the core 3, covering and supporting the core 3;

[0035] The air purifier is prepared as follows:

[0036] (1) LiOH and polyethylene fiber are mixed evenly in a container to obtain a dry mixture; the mass of the absorbent powder is 95% of the total mass of the raw materials;

[0037] (2) Add water to the container holding the dry mixture obtained in step (1) and stir evenly to obtain a wet mixture. The mass of water added is 10% of the mass of the wet mixture.

[0038] (3) Add diluted foaming agent to the container holding the wet mixture obtained in step (2), wherein the mass of the foaming agent is 0.3% of the mass of the wet mixture, and stir at a low speed of 200 r / min for 5 min to obtain a paste-like foamed mixture.

[0039] The foaming agent is sodium dodecylbenzenesulfonate, and the foaming agent is diluted 30 times with water;

[0040] (4) The paste-like foamed mixture obtained in step (3) is pressed and demolded in one go using a mold to obtain an air purifier with a honeycomb cavity structure, which serves as the core 3 of the air purifier device; the core 3 has interconnected air bubbles 5 of varying sizes and shapes that are visible to the naked eye. The porosity of the core 3 of the air purifier prepared in Example 1 is tested using the mass-volume method, and the porosity of the core 3 is measured to be 30%;

[0041] The morphology of the drug core 3 was tested using a scanning electron microscope. The honeycomb wall thickness of the honeycomb cavity of the drug core 3 is 1 mm to 3 mm, and the diameter of the inscribed circle of the honeycomb hole is 0.5 mm to 5 mm.

[0042] The roughness of the inner wall of the hollow columnar channel of the honeycomb cavity in the drug core 3 was tested using a microscope focusing method. The test results showed that the axial relative roughness of the hollow columnar channel of the honeycomb cavity was 0.12 to 0.25, and the circumferential relative roughness was 0.12 to 0.25.

[0043] Example 2

[0044] An air purification device is provided, the device being cuboid in shape and comprising a core 3, a dust filter cloth 1, and a frame 4; wherein, the core 3 is the air purifier described in this embodiment, and is generally cuboid in shape; the dust filter cloth 1 is a non-woven fabric with a thickness of 1mm, which covers the surfaces of the openings at both ends of the honeycomb array structure of the air purifier; the frame 4 is made of stainless steel, and is fixedly connected by countersunk screws 2, and is installed outside the core 3, covering and supporting the core 3;

[0045] The air purifier is prepared as follows:

[0046] (1) The absorbent powder and polyethylene fiber are uniformly mixed in a container, wherein the mass of the absorbent powder is 98% of the total mass of the raw materials, to obtain a dry mixture.

[0047] The absorbent powder is a mixture of LiOH, NaOH, and Ca(OH)2, with a mass ratio of 1:1:3.

[0048] (2) Add water to the container holding the dry mixture obtained in step (1) and stir evenly to obtain a wet mixture. The mass of water added is 20% of the mass of the wet mixture.

[0049] (3) Add diluted foaming agent to the container holding the wet mixture obtained in step (2), wherein the mass of the foaming agent is 0.3% of the mass of the wet mixture, and stir at a low speed of 500 r / min for 2 min to obtain a paste-like foamed mixture.

[0050] The foaming agent is tetradecyl dimethyl betaine, and the foaming agent is diluted 50 times with water;

[0051] (4) The paste-like foamed mixture obtained in step (3) is pressed and demolded in one go using a mold to obtain an air purifier with a honeycomb cavity structure, which serves as the core 3 of the air purifier device; the core 3 has interconnected air bubbles 5 of varying sizes and shapes that are visible to the naked eye. The porosity of the core 3 of the air purifier prepared in Example 2 is tested using the mass-volume method, and the porosity of the core 3 is measured to be 60%;

[0052] The morphology of the drug core 3 was tested using a scanning electron microscope. The honeycomb wall thickness of the honeycomb cavity of the drug core 3 is 1 mm to 3 mm, and the diameter of the inscribed circle of the honeycomb hole is 0.5 mm to 5 mm.

[0053] The roughness of the inner wall of the hollow columnar channel of the honeycomb cavity in the drug core 3 was tested using a microscope focusing method. The test results showed that the axial relative roughness of the hollow columnar channel of the honeycomb cavity was 0.12 to 0.25, and the circumferential relative roughness was 0.12 to 0.25.

[0054] The carbon dioxide absorption performance of the air purifiers prepared in Examples 1 and 2 was tested using the following method: The air purifiers were placed in a sealed test chamber (5m³). 3 Carbon dioxide is introduced into the sealed chamber at a flow rate of 200 L / h until the volume concentration of carbon dioxide in the chamber reaches 1%. Then, samples with dimensions of length × width × height = 150 × 150 × 300 mm are placed inside. 3 The air purifiers prepared in Examples 1 and 2 were continuously introduced with carbon dioxide at a flow rate of 200 L / h to begin testing the carbon dioxide absorption performance. Due to the adsorption effect of the air purifier, the volume concentration of carbon dioxide in the sealed test chamber will begin to decrease. As the adsorption capacity of the air purifier weakens, the volume concentration of carbon dioxide will begin to rise after decreasing to a certain level. During the experiment, the volume concentration of carbon dioxide in the sealed test chamber was tested every half hour until the volume concentration of carbon dioxide in the sealed chamber reached 1% again, at which point the experiment was stopped.

[0055] The test results show that, 5 hours after the start of the experiment, the volume concentration of carbon dioxide in the sealed test chamber of the air purifier described in Example 1 reached 1% again, absorbing 1000L of carbon dioxide; 3 hours after the start of the experiment, the volume concentration of carbon dioxide in the sealed test chamber of the air purifier described in Example 2 reached 1% again, absorbing 600L of carbon dioxide; indicating that the air purifier described in this invention has good adsorption performance for carbon dioxide.

[0056] According to the GBJ88-85 Engineering Construction Standard for Measurement of Sound Absorption Coefficient and Acoustic Impedance by Standing Wave Tube Method, the sound absorption coefficient of the air purifiers (sample thickness of 150 mm) prepared in Examples 1 and 2 was tested. The test results show that the sound absorption coefficient of the air purifier in Example 1 is 0.5 and the sound absorption coefficient of the air purifier in Example 2 is 0.7, indicating that the air purifier of the present invention also has good sound absorption performance.

[0057] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. An air purifier with sound-absorbing properties, characterized in that: The air purifier is integrally pressed from a porous material with a porosity of 30% to 60%, and has a honeycomb cavity array structure; the honeycomb cavity array structure is composed of several hollow columnar structures with regular hexagonal cross sections and open ends, arranged closely in parallel along the vertical direction; The porous material is prepared using absorbent powder and fiber as raw materials through a foaming process. The absorbent powder is at least one of LiOH, NaOH, and Ca(OH)2; the mass of the absorbent powder is 90% to 99.5% of the total mass of the raw materials. The wall thickness of each honeycomb cavity is 1mm~3mm, the diameter of the inscribed circle of the honeycomb cell is 0.5mm~5mm, and the axial relative roughness of the hollow columnar channel of the honeycomb cavity is 0.12~0.25, and the circumferential relative roughness is 0.12~0.

25.

2. The air purifier with sound absorption properties according to claim 1, characterized in that: The fiber is at least one of polyvinyl alcohol fiber, polyethylene fiber, polyester fiber, polypropylene fiber, and polyamide fiber; the mass of the absorbent powder is 95% to 98% of the total mass of the raw materials.

3. A method for preparing an air purifier with sound-absorbing properties as described in claim 1 or 2, characterized in that: The steps of the method are as follows: (1) The absorbent powder and fiber are mixed evenly to obtain a dry mixture; (2) Add water to the dry mixture and stir evenly to obtain a wet mixture; the mass of water added is 10% to 20% of the mass of the wet mixture. (3) Add the diluted foaming agent to the wet mixture and stir at low speed to obtain a paste-like foamed mixture; The low-speed stirring speed is 200 r / min to 500 r / min, and the stirring time is ≥2 min; Dilute the foaming agent with water, the dilution ratio is 30 to 50 times; (4) Press the paste-like foamed mixture into shape in one go using a mold, and demold it to obtain an air purifier with a honeycomb cavity structure.

4. The method for preparing an air purifier with sound absorption properties according to claim 3, characterized in that: The foaming agent is at least one of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, and tetradecyl dimethyl betaine; the mass of the foaming agent is 0.3% of the mass of the wet mixture.

5. An air purification device, characterized in that: The air purification device consists of a core, a dust filter cloth, and a frame; wherein the core is the air purifier as described in claim 1 or 2; the dust filter cloth covers the surfaces of the openings at both ends of the honeycomb array structure of the air purifier; and the frame is fixedly installed outside the core, covering and supporting the core.

6. An air purification device as described in claim 5, characterized in that: The dust filter cloth is a non-woven fabric with a thickness of 1mm to 3mm; the frame is made of metal.

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