阅读说明：本技术 一种车载空调用除菌抗菌石墨烯滤芯及其制备方法 (Degerming antibacterial graphene filter element for vehicle-mounted air conditioner and preparation method thereof ) 是由 李磊 刘同浩 路广 任晓弟 韩卫 于 2020-05-25 设计创作，主要内容包括：本发明涉及一种车载空调用除菌抗菌石墨烯滤芯,属于空气过滤领域,其特征在于,包括支撑座、固定层及多个套管组件,支撑座包括第一支座和第二支座,多个套管组件均匀设置在第一支座和第二支座之间,套管组件两端分别与第一支座和第二支座相连接,固定层连接在第一支座和第二支座之间；套管组件包括第一过滤套管,由依次设置的第一无纺布层、活性炭滤层、第一无纺布层组成,活性炭层夹设在两层第一无纺布层之间,第二过滤套管,套设在第一过滤管外部,由依次设置的第二无纺布层、石墨烯银纳米颗粒滤层、第二无纺布层组成,石墨烯银纳米颗粒滤层夹设在两层第二无纺布层之间；旨在解决车载空调滤芯滤芯寿命较短、需更换频繁、更换操作不便等问题。(The invention relates to a degerming antibacterial graphene filter element for a vehicle-mounted air conditioner, which belongs to the field of air filtration and is characterized by comprising a supporting seat, a fixing layer and a plurality of sleeve pipe assemblies, wherein the supporting seat comprises a first support and a second support; the sleeve assembly comprises a first filtering sleeve, a second filtering sleeve and a third filtering sleeve, wherein the first filtering sleeve is composed of a first non-woven fabric layer, an activated carbon filtering layer and a first non-woven fabric layer which are sequentially arranged, the activated carbon layer is clamped between the two first non-woven fabric layers, the second filtering sleeve is sleeved outside the first filtering pipe and is composed of a second non-woven fabric layer, a graphene silver nanoparticle filtering layer and a second non-woven fabric layer which are sequentially arranged, and the graphene silver nanoparticle filtering layer is clamped between the two second non-woven fabric layers; aims to solve the problems that the filter element of the vehicle-mounted air conditioner filter has short service life, needs to be replaced frequently, is inconvenient to replace and operate and the like.)

1. The degerming antibacterial graphene filter core for the vehicle-mounted air conditioner is characterized by comprising a supporting seat (1), a fixing layer (3) and a plurality of sleeve pipe assemblies (2), wherein the supporting seat (1) comprises a first support (11) and a second support (12), the plurality of sleeve pipe assemblies (2) are uniformly arranged between the first support (11) and the second support (12), two ends of each sleeve pipe assembly (2) are respectively connected with the first support (11) and the second support (12), the fixing layer (3) is connected between the first support (11) and the second support (12), and the fixing layer (3) is coated on the outer sides of the plurality of sleeve pipe assemblies (2);

the sleeve assembly (2) comprises

The first filtering sleeve (21) consists of a first non-woven fabric layer (211), an activated carbon filtering layer (212) and a first non-woven fabric layer (211) which are arranged in sequence, the activated carbon filtering layer (212) is clamped between the two first non-woven fabric layers (211),

the second filtering sleeve (22) is sleeved outside the first filtering sleeve (21), a preset distance is reserved between the inner wall of the second filtering sleeve and the outer wall of the first filtering sleeve (21), the second filtering sleeve consists of a second non-woven fabric layer (221), a graphene silver nanoparticle filtering layer (222) and the second non-woven fabric layer (221) which are sequentially arranged, and the graphene silver nanoparticle filtering layer (222) is clamped between the two second non-woven fabric layers (221);

the outer end of the first support (11) is used as an air inlet end (4), the core part of the first filter sleeve (21) is communicated with the air inlet end (4) as an air inlet duct (6), the outer end of the second support (12) is used as an air outlet end (5), and a gap formed between every two adjacent second filter sleeves (22) is communicated with the air outlet end (5) as an air outlet duct (7).

2. The degerming antibacterial graphene filter core for the vehicle-mounted air conditioner as claimed in claim 1, wherein the inner ends of the first support (11) and the second support (12) are provided with clamping seats for fixing the sleeve assembly (2).

3. The degerming and antibacterial graphene filter element for the vehicle air conditioner as claimed in claim 1, wherein the first filter sleeve (21) penetrates through the first support (11) and is connected with the first support (11).

4. The degerming and antibacterial graphene filter element for the vehicle air conditioner as claimed in claim 1, wherein the end portions of the graphene silver nanoparticle filter layer (222) of the second filter sleeve (22) and the second non-woven fabric layer (221) of the inner layer are fixed on the second support (12) in a closed manner, and the second non-woven fabric layer (221) of the outer layer of the second filter sleeve (22) penetrates through the second support (12) and is connected with the second support (12).

5. The degerming and antibacterial graphene filter element for the vehicle-mounted air conditioner as claimed in claim 1, wherein the cross sections of the first filter sleeve (21) and the second filter sleeve (22) are both annular.

6. The degerming and antibacterial graphene filter element for the vehicle air conditioner as claimed in claim 1, wherein the fixing layer (3) is a non-woven fabric layer with a single-layer or multi-layer structure.

7. The degerming and antibacterial graphene filter element for the vehicle-mounted air conditioner as claimed in claim 1, wherein the outer end faces of the adjacent second filter sleeves (22) are attached to each other.

8. The degerming and antibacterial graphene filter element for the vehicle-mounted air conditioner as claimed in claim 1, wherein a sealing ring matched with the first filtering sleeve (21) is arranged on the first support (11), and a sealing ring matched with the second filtering sleeve (22) is arranged on the second support (12).

9. The preparation method of the degerming antibacterial graphene filter element for the vehicle air conditioner as claimed in any one of claims 1 to 8, characterized by comprising the following process steps:

preparation of the first filter cartridge (21): winding the two non-woven fabric layers into a cylinder shape, and filling active carbon between the two non-woven fabric layers;

preparation of the second filter cartridge (22): spraying graphene silver nanoparticles on the surface of a non-woven fabric, drying, covering a layer of non-woven fabric, and winding to prepare a cylinder shape;

embedding the first filter sleeve (21) into the second filter sleeve (22) to form a sleeve assembly (2) connected to the support base (1), arranging a plurality of sleeve assemblies (2) in a honeycomb shape, and fixing the sleeve assemblies by using a fixing layer to obtain the filter element.

10. The preparation method of the degerming antibacterial graphene filter element for the vehicle-mounted air conditioner as claimed in claim 9, wherein in the preparation process of the second filter sleeve (22), a spraying method of graphene silver nanoparticles comprises the following steps: firstly, adding the binders PVA and PET into pure water, uniformly stirring, then adding the graphene/silver nanoparticle composite material, stirring, and spraying the mixture on the surface of non-woven fabric after uniformly stirring;

the preparation method of the graphene/silver nanoparticle composite material comprises the following process steps:

a. preparing a graphene oxide material by a Hummers method: adding a solid mixture of graphite powder and sodium nitrate into concentrated sulfuric acid under stirring; adding potassium permanganate in times, controlling the reaction temperature not to exceed 4 ℃, and stirring for reaction for a period of time; then slowly raising the temperature and keeping the temperature at 35-40 ℃, and continuously stirring for a period of time; slowly adding deionized water at a temperature not higher than 70 ℃; then heating to 85 ℃, stirring and reacting for a period of time, adding a proper amount of deionized water and hydrogen peroxide, wherein the hydrogen peroxide can reduce residual unreacted KMnO₄The solution turned bright yellow; filtering while the solution is hot, and washing the solution by using 5 percent HCl solution and deionized water until no sulfate radical exists in the filtrate; finally, drying the filter cake in vacuum to prepare graphene oxide;

b. b, adding deionized water into the graphene oxide prepared in the step a to prepare a graphene oxide solution with the concentration of 0.1-1%, and performing ultrasonic dispersion on the graphene oxide solution to obtain AgNO with the concentration of 0.1-3mg/mL₃Adding the solution into the graphene oxide dispersion liquid, and stirring in the dark to uniformly mix the solution; then adding a reducing agent into the mixed solution, stirring and reacting for 30-180min, carrying out suction filtration on the reaction solution to obtain a graphene oxide/silver nanoparticle composite material filter cake, and carrying out vacuum drying on the filter cake to obtain graphene oxide/silver nanoparticle composite material powder;

the reducing agent is at least one of polyvinylpyrrolidone, polyethylene glycol, glucose and ascorbic acid;

c. and c, placing the graphene oxide/silver nanoparticle composite material powder prepared in the step b into a crucible, slowly heating to 200 ℃ in a muffle furnace, preserving heat for 30-60min, then heating to 700 ℃ and preserving heat for 30-60min, and naturally cooling to room temperature to obtain the graphene/silver nanoparticle composite material.

Technical Field

The invention relates to the field of air filtration, in particular to a degerming antibacterial graphene filter element for a vehicle-mounted air conditioner and a preparation method thereof.

Background

The existing automobile air-conditioning filter element comprises a common air-conditioning filter element and an active carbon series air-conditioning filter element. The purpose is to filter impurities contained in air entering the carriage from the outside, such as tiny particulate matters, pollen, industrial waste gas, dust and the like, so that the cleanliness of the air is improved. The substances are prevented from entering the air conditioning system to damage the air conditioning system, so that a good air environment is provided for passengers in the vehicle, and the physical health of the passengers in the vehicle is protected. However, practical use shows that the two types of air conditioning filter elements can only filter harmful substances such as tiny particulate matters, pollen, dust and the like in air, can not well isolate and remove bacteria and viruses contained in the air, can not inhibit the breeding of the bacteria and the viruses in the long-term use process of the filter elements, and can cause serious harm to the health of people in a vehicle. The common filter element and the active carbon filter element are generally designed into a wave shape to increase the filtering area, air enters the vehicle after being filtered for one time, and the filtering effect on the air is not good; and the vehicle-mounted air conditioner filter element in the prior art has a series of problems of short filter element service life, frequent replacement, inconvenient replacement operation and the like. The prior art has not recorded that the sleeve structure is applied to a vehicle-mounted air conditioner filter element.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides a degerming antibacterial graphene filter element with a better filtering effect for a vehicle-mounted air conditioner and a preparation method thereof.

The technical scheme for solving the technical problems is as follows: the degerming antibacterial graphene filter core for the vehicle-mounted air conditioner is characterized by comprising a supporting seat, a fixing layer and a plurality of sleeve pipe assemblies, wherein the supporting seat comprises a first support and a second support;

the sleeve assembly comprises

The first filtering sleeve consists of a first non-woven fabric layer, an active carbon filtering layer and a first non-woven fabric layer which are arranged in sequence, the active carbon layer is clamped between the two first non-woven fabric layers,

the second filtering sleeve is sleeved outside the first filtering pipe, a preset distance is reserved between the inner wall of the second filtering sleeve and the outer wall of the first filtering pipe, the second filtering sleeve consists of a second non-woven fabric layer, a graphene silver nanoparticle filtering layer and a second non-woven fabric layer which are sequentially arranged, and the graphene silver nanoparticle filtering layer is clamped between the two second non-woven fabric layers;

the outer end of the first support is used as an air inlet end, the core part of the first filter sleeve is used as an air inlet channel and is communicated with the air inlet end, the outer end of the second support is used as an air outlet end, and a gap formed between every two adjacent second filter sleeves is used as an air outlet channel and is communicated with the air outlet end.

Furthermore, the inner ends of the first support and the second support are provided with clamping seats for fixing the sleeve pipe assembly, and the sleeve pipe assembly is clamped on the clamping seats and then connected with the first support and the second support.

Or another connection mode is adopted, namely the first filtering sleeve penetrates through the first support to be connected with the first support, the end parts of the graphene silver nanoparticle filtering layer of the second filtering sleeve and the second non-woven fabric layer of the inner layer are fixed on the second support in a closed mode, and the second non-woven fabric layer of the outer layer of the second filtering sleeve penetrates through the second support to be connected with the second support.

Furthermore, the cross sections of the first filtering sleeve and the second filtering sleeve are both arranged in a circular ring shape.

Further, the fixing layer is arranged as a non-woven fabric layer with a single-layer or multi-layer structure.

Furthermore, the outer end faces of the adjacent second filter sleeves are attached to each other.

Furthermore, a sealing ring matched with the first filtering sleeve is arranged on the first support, and a sealing ring matched with the second filtering sleeve is arranged on the second support.

The preparation method of the degerming antibacterial graphene filter element for the vehicle-mounted air conditioner is characterized by comprising the following process steps:

preparation of a first filter sleeve: winding the two non-woven fabric layers into a cylinder shape, and filling active carbon between the two non-woven fabric layers;

preparation of a second filter sleeve: spraying graphene silver nanoparticles on the surface of a non-woven fabric, drying, covering a layer of non-woven fabric, and winding to prepare a cylinder shape;

and embedding the first filter sleeve into the second filter sleeve to form a sleeve assembly, connecting the sleeve assembly to the support base, arranging the plurality of sleeve assemblies in a honeycomb shape, and finally fixing the sleeve assemblies by using a fixing layer to obtain the filter element.

Further, in the preparation process of the second filter sleeve, the spraying method of the graphene silver nanoparticles comprises the following steps: firstly, adding the binders PVA and PET into pure water, uniformly stirring, then adding the graphene/silver nanoparticle composite material, stirring, and spraying the mixture on the surface of non-woven fabric after uniformly stirring;

the preparation method of the graphene/silver nanoparticle composite material comprises the following process steps:

a. preparation of graphite oxide by Hummers methodAlkene material: adding a solid mixture of graphite powder and sodium nitrate into concentrated sulfuric acid under stirring; adding potassium permanganate in times, controlling the reaction temperature not to exceed 4 ℃, and stirring for reaction for a period of time; then slowly raising the temperature and keeping the temperature at 35-40 ℃, and continuously stirring for a period of time; slowly adding deionized water at a temperature not higher than 70 ℃; then heating to 85 ℃, stirring and reacting for a period of time, adding a proper amount of deionized water and hydrogen peroxide, wherein the hydrogen peroxide can reduce residual unreacted KMnO₄The solution turned bright yellow; filtering while the solution is hot, and washing the solution by using 5 percent HCl solution and deionized water until no sulfate radical exists in the filtrate; finally, drying the filter cake in vacuum to prepare graphene oxide;

b. b, adding deionized water into the graphene oxide prepared in the step a to prepare a graphene oxide solution with the concentration of 0.1-1%, and performing ultrasonic dispersion on the graphene oxide solution to obtain AgNO with the concentration of 0.1-3mg/mL₃Adding the solution into the graphene oxide dispersion liquid, and stirring in the dark to uniformly mix the solution; then adding a reducing agent into the mixed solution, stirring and reacting for 30-180min, carrying out suction filtration on the reaction solution to obtain a graphene oxide/silver nanoparticle composite material filter cake, and carrying out vacuum drying on the filter cake to obtain graphene oxide/silver nanoparticle composite material powder;

the purpose of this step is to use chemical reduction method to make Ag⁺Reducing, namely attaching silver nanoparticles to the surface of graphene oxide in situ, wherein the silver nanoparticles are firmly bonded to the surface of the graphene oxide and can be attached to the surface of the graphene oxide for a long time, so that the graphene oxide/silver nanoparticle composite material is prepared;

the reducing agent is at least one of polyvinylpyrrolidone, polyethylene glycol, glucose and ascorbic acid;

c. and c, placing the graphene oxide/silver nanoparticle composite material powder prepared in the step b into a crucible, slowly heating to 200 ℃ in a muffle furnace, preserving heat for 30-60min, then heating to 700 ℃ and preserving heat for 30-60min, and naturally cooling to room temperature to obtain the graphene/silver nanoparticle composite material. The method aims to reduce graphene oxide so as to prepare the graphene/silver nanoparticle composite material.

The invention has the beneficial effects that:

1. the vehicle-mounted air conditioner filter element is different from the traditional air conditioner filter element in that the wave-shaped structure is adopted to increase the filtering area, but a novel cylindrical composite sleeve honeycomb structure is designed to increase the filtering area of air; the diameter of the sleeve of the air conditioner filter element can be increased or reduced according to actual requirements, and the length of the sleeve can be increased or shortened for processing and manufacturing, so that the air conditioner filter element conforming to the vehicle type is prepared; under the same volume, the contact area of the filter screen and air is increased, so that the air conditioner filter element provides larger filter area and has high filter efficiency;

2. the graphene silver nanoparticle filter layer is additionally arranged on the basis of a traditional vehicle-mounted air conditioner filter element, the filter element not only can play a role in removing dust, pollen and micro particles of the traditional vehicle-mounted air conditioner filter element, but also has good effects of isolating and removing bacteria and viruses in the air, and after the air outside the vehicle or the air inside the vehicle is filtered by the filter element, the bacteria contained in the air can be effectively reduced, so that the personal safety of personnel inside the vehicle is ensured;

3. through the arrangement of the first filtering sleeve and the second filtering sleeve which are matched with the connection relationship between the first filtering sleeve and the second filtering sleeve and the arrangement of the air flow channel, a wall-attached rotational flow effect can be formed in the air outlet channel, the air circulation speed is greatly increased, the filtering effect is improved, and the requirement of the air flux of the vehicle-mounted air conditioner is met;

4. the graphene silver nanoparticle filter layer main body is made of a graphene/silver nanoparticle composite material, the graphene has a large specific surface area and good adsorbability, and can adsorb microscopic fine particles, so that the dust removal effect of air entering the vehicle from the outside of the vehicle can be improved, and PM2.5 entering an air circulation system in the vehicle can be effectively reduced; the silver nanoparticles loaded on the surface of the graphene have the functions of sterilization and antibiosis, and the synergistic effect of the silver nanoparticles and the graphene can greatly improve the sterilization and bacteriostasis effects of the material when filtering air by matching with the strong adsorbability of the graphene; meanwhile, the composite material prepared by the process method has strong binding force between the nano-silver particles and the graphene, so that the nano-silver particles can be loaded on the surface of the graphene for a long time, and the composite material has a long-term antibacterial function, greatly improves the antibacterial aging of the filter element and prolongs the service life of the filter element; the antibacterial filter element is applied to a vehicle-mounted air conditioner filter element, not only can good effects of removing bacteria and resisting bacteria and reducing microscopic fine particles be achieved, but also the antibacterial filter element has a protective effect on people in a vehicle, and the filter element replacement frequency is reduced due to the longer antibacterial aging;

5. the graphene/silver nanoparticle composite material filter layer can stably exist for a long time, and because the silver nanoparticles have the effect of inhibiting the growth of bacteria, no matter whether a vehicle-mounted air conditioning system operates, the vehicle-mounted air conditioning filter element can inhibit the growth of bacteria, the air conditioning filter element is ensured to be in an aseptic state, and the environment in a vehicle is ensured to be always in a safe and reliable state.

Drawings

Fig. 1 is a schematic perspective view of an air conditioner filter element according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an air conditioner filter element according to an embodiment of the present invention

FIG. 3 is a schematic cross-sectional view of an air conditioning filter element according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an air conditioning filter element according to another embodiment of the present invention;

FIG. 5 is a cross-sectional view of a ferrule assembly according to an embodiment of the present invention;

in the figure: 1. the air filter comprises a supporting seat, 11. a first supporting seat, 12. a second supporting seat, 2. a sleeve assembly, 21. a first filtering sleeve, 211. a first non-woven fabric layer, 212. an activated carbon filtering layer, 22. a second filtering sleeve, 221. a second non-woven fabric layer, 222. a graphene silver nanoparticle filtering layer, 3. a fixing layer, 4. an air inlet end, 5. an air outlet end, 6. an air inlet duct and 7. an air outlet duct.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

The degerming antibacterial graphene filter element for the vehicle-mounted air conditioner comprises a supporting seat 1, a fixing layer 3 and a plurality of sleeve pipe assemblies 2, wherein the supporting seat 1 comprises a first supporting seat 11 and a second supporting seat 12, the plurality of sleeve pipe assemblies 2 are uniformly arranged between the first supporting seat 11 and the second supporting seat 12, two ends of each sleeve pipe assembly 2 are respectively connected with the first supporting seat 11 and the second supporting seat 12, the fixing layer 3 is connected between the first supporting seat 11 and the second supporting seat 12, the fixing layer 3 covers the outer sides of the plurality of sleeve pipe assemblies 2, and the fixing layer 3 is a non-woven fabric layer; the sleeve assembly 2 comprises

The first filtering sleeve 21 is composed of a first non-woven fabric layer 211, an activated carbon filtering layer 212 and the first non-woven fabric layer 211 which are arranged in sequence, the activated carbon filtering layer 212 is clamped between the two first non-woven fabric layers 211,

the second filtering sleeve 22 is sleeved outside the first filtering sleeve 21, a preset distance is reserved between the inner wall of the second filtering sleeve and the outer wall of the first filtering sleeve 21, the second filtering sleeve is composed of a second non-woven fabric layer 221, a graphene silver nanoparticle filtering layer 222 and a second non-woven fabric layer 221 which are sequentially arranged, and the graphene silver nanoparticle filtering layer 222 is clamped between the two second non-woven fabric layers 221;

the outer end of the first support 11 is used as an air inlet end 4, the core part of the first filter sleeve 21 is used as an air inlet duct 6 and communicated with the air inlet end 4, the outer end of the second support 12 is used as an air outlet end 5, and a gap formed between the adjacent second filter sleeves 22 is used as an air outlet duct 7 and communicated with the air outlet end 5.

The first support 11 and the second support 12 can be set to have circular or rectangular cross-sectional shapes, and the length of the sleeve assembly 2 is adjusted to meet the installation requirement of the vehicle air conditioner filter element.

In this embodiment, the inner ends of the first support 11 and the second support 12 are provided with a clamping seat for fixing the sleeve assembly 2.

In another embodiment of the present invention, the first filtering sleeve 21 penetrates through the first support 11 to be connected to the first support 11, the end portions of the graphene silver nanoparticle filtering layer 222 and the second non-woven fabric layer 221 of the inner layer of the second filtering sleeve 22 are fixed to the second support 12 in a closed manner, and the second non-woven fabric layer 221 of the outer layer of the second filtering sleeve 22 penetrates through the second support 12 to be connected to the second support 12.

In this embodiment, the cross sections of the first filter sleeve 21 and the second filter sleeve 22 are both circular.

In this embodiment, the outer ends of adjacent second filter sleeves 22 are separated from each other, i.e., do not contact each other.

In another embodiment of the present invention, the outer end surfaces of adjacent second filter sleeves 22 are attached to each other.

In this embodiment, the first support 11 is provided with a sealing ring adapted to the first filtering sleeve 21, and the second support 12 is provided with a sealing ring adapted to the second filtering sleeve 22.

When the air conditioner is used, air outside the automobile enters the automobile, firstly enters the first filtering sleeve 21 through the air inlet end 4 and the air inlet duct 6, then enters the second filtering sleeve 22 for filtering, and finally enters the air circulating system inside the automobile through the air outlet duct 7 and the air outlet end 5 and enters the interior of the automobile; the fixed layer 3 can be set to be the air-impermeable layer at this moment, whole process air loops through first non-woven fabrics layer, activated carbon filtering layer, first non-woven fabrics layer, second non-woven fabrics layer, graphite alkene/silver nanometer line filtering layer, second non-woven fabrics layer, and the activated carbon filtering layer mainly is arranged in filtering harmful substance such as tiny particulate matter, pollen, dust in the air, and graphite alkene/silver nanometer line filtering layer is arranged in filtering more tiny dust particle to have the effect of disinfecting, restrain bacterial growing. Above all, the sleeve pipe assembly with the structure is matched with the direction of air circulation, so that the effect of wall-attached rotational flow can be formed in the air outlet duct, the circulation speed of air is greatly increased, the filtering effect is improved, and the requirement of the air flux of the vehicle-mounted air conditioner is met.

The preparation method of the filter element comprises the following steps: