Filtering function mechanism, air filtering device and air conditioner

Abstract

The present invention relates to a filtering function mechanism, an air filtering device and an air conditioner. The filtering function mechanism is provided with a first porous electrode plate and a second porous electrode plate arranged opposite to and spaced apart from each other, for forming an electric field between the two, and a filtering component is provided between the two, the filtering component comprising a porous material matrix and polydopamine loaded on the porous material matrix. The porous material matrix allows airflow to pass through, and the polydopamine loaded thereon has a high dielectric constant. When a polarization voltage is applied to the filtering component, the polarization degree of the polydopamine increases, the filtering component induces more charges, and the attraction to particulate matter in the air is enhanced, thereby improving the filtering efficiency. In addition, the presence of polydopamine causes the filtering component to form a rough surface, which can increase the dust holding capacity of the filtering component. Polydopamine also changes the microstructure of the porous material matrix, reducing the airflow resistance of the porous material matrix.

Description

Technical Field

[0001] The present invention relates to the technical field of air filtration, and in particular to a filtering function mechanism, an air filtering device and an air conditioner. Background Art

[0002] Air conditioning systems not only regulate room temperature but also purify the air. Most filter modules in air conditioning systems use high-efficiency filters, which are highly effective at filtering air. However, these filters have significant airflow resistance and low dust holding capacity. Summary of the Invention

[0003] Based on this, it is necessary to provide a filtering function mechanism, an air filtering device and an air conditioner to reduce air flow resistance and increase dust holding capacity while achieving high-efficiency filtration.

[0004] One of the purposes of the present invention is to provide a filtering mechanism, the scheme is as follows:

[0005] A filtering mechanism, characterized by comprising:

[0006] An electric field polarization component, comprising a first porous plate and a second porous plate arranged opposite to and spaced apart from each other; and

[0007] The filter component is arranged between the first porous electrode plate and the second porous electrode plate, and the filter component includes a porous material matrix and polydopamine supported on the porous material matrix.

[0008] In one embodiment, the method for preparing the filter component comprises the following steps:

[0009] immersing the porous material matrix in a buffer solution and stirring to obtain a mixed solution;

[0010] adding dopamine hydrochloride solution to the mixed solution and stirring to react;

[0011] The solid reaction product is removed, washed, and dried.

[0012] In one embodiment, the material of the porous material matrix is ​​selected from at least one of aramid, PET, PE, activated carbon and glass fiber.

[0013] In one embodiment, the porous material matrix is ​​prepared by melt-blowing or electrospinning.

[0014] In one embodiment, the opening area of ​​the first porous plate accounts for 50% to 95%.

[0015] In one embodiment, the opening area of ​​the second porous plate accounts for 50% to 95%.

[0016] In one embodiment, the filter component is connected to one of the first porous electrode plate and the second porous electrode plate, and the distance between the filter component and the other one is 3 mm to 10 mm.

[0017] Another object of the present invention is to provide an air filter, which has the following scheme:

[0018] An air filtering device, comprising:

[0019] The filter chamber housing has an air inlet and an air outlet arranged opposite to each other;

[0020] a discharge function mechanism, disposed in the filter cavity housing, the discharge function mechanism having a discharge tip; and

[0021] The filtering function mechanism described in any of the above embodiments is arranged in the filter cavity shell. Compared with the discharge mechanism, the filtering function mechanism is farther away from the air inlet and closer to the air outlet.

[0022] In one embodiment, the discharge function mechanism further comprises:

[0023] Conductive apertured plate; and

[0024] The support frame is opposite to and spaced from the conductive aperture plate. Compared with the conductive aperture plate, the support frame is closer to the filtering function mechanism. The discharge tip is arranged on the support frame. The discharge tip is located between the conductive aperture plate and the support frame and faces the conductive aperture plate.

[0025] In one embodiment, there are multiple discharge tips, and the multiple discharge tips are evenly distributed on the support frame.

[0026] In one embodiment, the distribution density of the discharge tips is 25cm 2 / piece~100cm 2 / indivual.

[0027] In one embodiment, the distance between the discharge tip and the conductive perforated plate is 1 cm to 2 cm.

[0028] In one embodiment, the conductive perforated plate is provided with a plurality of alignment holes, and the plurality of alignment holes correspond one-to-one to the plurality of discharge tips, and each discharge tip faces the geometric center of the corresponding alignment hole.

[0029] In one embodiment, the conductive perforated plate is further provided with a plurality of resistance reducing holes, and the plurality of resistance reducing holes are distributed between adjacent alignment holes.

[0030] In one embodiment, the conductive perforated plate has an opening area accounting for 50% to 80%.

[0031] Another object of the present invention is to provide an air conditioner, the scheme is as follows:

[0032] An air conditioner comprises a chassis, an air flow channel, a temperature regulating device, a fan and the air filtering device described in any of the above embodiments, wherein the air flow channel is at least partially arranged in the chassis, and the temperature regulating device, the fan and the air filtering device are respectively arranged in the air flow channel.

[0033] Compared with existing solutions, the above-mentioned filtering function mechanism, air filtering device and air conditioner have the following beneficial effects:

[0034] The above-mentioned filtering function mechanism is provided with a first porous electrode plate and a second porous electrode plate opposite to and spaced apart from each other, for forming an electric field between the two, and a filtering component is provided between the two, the filtering component comprising a porous material matrix and polydopamine loaded on the porous material matrix. The porous material matrix allows airflow to pass through, and the polydopamine loaded thereon has a high dielectric constant. When a polarization voltage is applied to the filtering component, the polarization degree of the polydopamine increases, the filtering component induces more charges, and the attraction to particulate matter in the air is enhanced, thereby improving the filtering efficiency. In addition, the presence of polydopamine causes the filtering component to form a rough surface, which can increase the dust holding capacity of the filtering component. Polydopamine also changes the microstructure of the porous material matrix, reducing the airflow resistance of the porous material matrix.

[0035] The above-mentioned air filter device has the filtering function mechanism of any of the above-mentioned embodiments, thereby possessing all the features and advantages of the above-mentioned filtering function mechanisms. Furthermore, the above-mentioned air filter device also has a discharge function mechanism provided within the filter cavity housing, which has a discharge tip for corona discharge. This can charge particulate matter in the airflow entering from the air inlet, and the filter element is charged by the electric field. When the charged particulate matter passes through the filter element, it is attracted by the opposite charge on it, thereby achieving the capture of the particulate matter. Therefore, the above-mentioned air filter device achieves a high-efficiency, low-resistance, and large dust holding capacity filtering effect.

[0036] The air conditioner has the air filter device of any of the above embodiments, and thus can have all the features and advantages of the above air filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a filtering function mechanism according to an embodiment;

[0038] Figure 2 for Figure 1 A schematic structural diagram of the first porous electrode plate in the filtering function mechanism shown;

[0039] Figure 3 for Figure 1 A schematic structural diagram of the second porous electrode plate in the filtering function mechanism shown;

[0040] Figure 4 for Figure 1 A schematic structural diagram of the filtering component in the filtering function mechanism shown;

[0041] Figure 5 An embodiment includes Figure 1 An exploded view of the air filter device showing the filtering function mechanism;

[0042] Figure 6 for Figure 5 A cross-sectional view of the air filter device shown;

[0043] Figure 7 for Figure 5 A schematic diagram of the structure of the discharge function mechanism in the air filter device shown;

[0044] Figure 8 for Figure 5 A schematic structural diagram of a conductive perforated plate in the air filter device shown;

[0045] Figure 9 for Figure 5 A schematic structural diagram of a support frame in the air filter device shown;

[0046] Figure 10 An embodiment includes Figure 5 A schematic structural diagram of an air conditioner with an air filtration device shown;

[0047] Figure 11 This is a bar graph of the filtration efficiency of experimental groups 1 to 6 against 0.3 micron particles;

[0048] Figure 12 The bar graph shows the resistance of experimental groups 1 to 6 to 1 m / s airflow;

[0049] Figure 13 It is a line graph of the filtration efficiency of experimental group 7 for airflows containing different particle concentrations and particle sizes;

[0050] Figure 14 The figure is a line graph showing the filtration efficiency of the experimental group 8 for air flow at different discharge voltages and polarization voltages.

[0051] Description of reference numerals:

[0052] 100. Filtering function mechanism; 110. Electric field polarization component; 111. First porous electrode plate; 112. Second porous electrode plate; 120. Filtering component; 130. First power supply; 131. First conductive spring; 20. Air filtering device; 210. Filter cavity shell; 220. Discharge function mechanism; 221. Discharge tip; 222. Conductive aperture plate; 2221. Alignment hole; 2222. Resistance reduction hole; 223. Support frame; 2231. Frame body; 2232. Conductive circuit; 224. Support column; 225. Second power supply; 226. Second conductive spring; 30. Air conditioner; 311. Fresh air duct; 312. Return air duct; 313. Supply air duct; 320. Temperature regulating device; 330. Fan; 340. Humidity regulating device. DETAILED DESCRIPTION

[0053] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0054] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0055] In the description of the present invention, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being described. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include at least one of such features.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0057] The invention provides a filtering function mechanism.

[0058] Please refer to Figures 1 to 4 As shown, the filtering function mechanism 100 of one embodiment includes an electric field polarization component 110 and a filtering component 120 .

[0059] The electric field polarization component 110 includes a first porous electrode plate 111 and a second porous electrode plate 112 .

[0060] The first porous plate 111 and the second porous plate 112 are arranged opposite each other and spaced apart to form an electric field between them. For example, one of them is connected to a power source and the other is grounded, creating a potential difference that generates an electric field between them. Preferably, the first porous plate 111 and the second porous plate 112 are arranged in parallel. The first porous plate 111 and the second porous plate 112 are each provided with a plurality of air holes for airflow.

[0061] The filter component 120 is disposed between the first porous electrode plate 111 and the second porous electrode plate 112. The filter component 120 includes a porous material matrix and polydopamine supported on the porous material matrix.

[0062] The porous material matrix allows airflow to pass through, and the polydopamine loaded thereon has a high dielectric constant. When a polarization voltage is applied to the filter component 120, the polarization degree of the polydopamine increases, the filter component 120 induces more charge, and the attraction to particulate matter in the air increases, thereby improving the filtration efficiency. In addition, the presence of polydopamine causes the filter component 120 to form a rough surface, which can increase the dust holding capacity of the filter component 120. Polydopamine also changes the microstructure of the porous material matrix, reducing the airflow resistance of the porous material matrix.

[0063] The filter component 120 is connected to one of the first porous electrode plate 111 and the second porous electrode plate 112, and the filter component 120 is spaced apart from the other one, and the spacing distance is, for example, 3mm to 10mm, that is, the spacing distance between the first porous electrode plate 111 and the second porous electrode plate 112 is 3mm to 10mm larger than the thickness of the filter component 120, and specifically can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, etc.

[0064] In one example, the first porous plate 111 is connected to a power source, and the second porous plate 112 is grounded. The filter component 120 is connected to the second porous plate 112 and spaced apart from the first porous plate 111. Furthermore, the filter component 120 covers all the air holes on the second porous plate 112.

[0065] In one example, the filtering mechanism 100 further includes a first power source 130 , and the first power source 130 is connected to at least one of the first porous plate 111 and the second porous plate 112 via a first conductive spring 131 .

[0066] It is understood that in other examples, the filtering function mechanism 100 may also be connected to an external power source.

[0067] The opening area of ​​the first porous electrode plate 111 and the second porous electrode plate 112 accounts for a larger proportion, and the resistance to the airflow is smaller. The smaller proportion of the opening area is conducive to improving the uniformity of the electric field.

[0068] In one example, the open area of ​​the first porous plate 111 accounts for 50% to 95%. Further, in one example, the open area of ​​the first porous plate 111 accounts for 70% to 85%. In some specific examples, the open area of ​​the first porous plate 111 accounts for 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 95%, etc.

[0069] In one example, the first porous plate 111 is a wire mesh structure.

[0070] In one example, the open area of ​​the second porous plate 112 accounts for 50% to 95%. Further, in one example, the open area of ​​the second porous plate 112 accounts for 70% to 85%. In some specific examples, the open area of ​​the second porous plate 112 accounts for 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 95%, etc.

[0071] In one example, the second porous plate 112 is a wire mesh structure.

[0072] In one example, the porosity of the porous material matrix is ​​90% to 99.9%. Furthermore, in another example, the porosity of the porous material matrix is ​​92% to 97%. In some specific examples, the porosity of the porous material matrix is ​​90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, etc. A porous material matrix with a porosity within the above range has low resistance to airflow.

[0073] In one example, the porous material matrix has a resistance per millimeter of thickness below 5 Pa, for example, 1 to 4 Pa, at a filtering wind speed of 1 m / s.

[0074] Optionally, the material of the porous material matrix is ​​selected from at least one of aramid, PET, PE, activated carbon and glass fiber.

[0075] In one example, the porous material matrix is ​​prepared by meltblowing or electrospinning.

[0076] In one example, the method for preparing the filter component 120 includes the following steps:

[0077] Step S1: immerse the porous material substrate in a buffer solution and stir to obtain a mixed solution.

[0078] The buffer solution may be, but is not limited to, Tris hydrochloric acid buffer.

[0079] In one example, the pH value of the buffer solution is 8-9, specifically 8, 8.2, 8.5, 8.7, 9, etc.

[0080] In one example, the stirring time is 10 min to 30 min, specifically 10 min, 15 min, 20 min, 25 min, 30 min, etc.

[0081] Step S2: adding dopamine hydrochloride solution to the above mixed solution and stirring for reaction.

[0082] In one example, the mass ratio of the solute (ie, dopamine hydrochloride) in the dopamine hydrochloride solution to the porous material matrix is ​​1:2 to 1:3, specifically 1:2, 1:2.2, 1:2.5, 1:2.8, 1:3, etc.

[0083] In one example, the stirring reaction time is more than 12 hours, for example, 12 hours to 36 hours.

[0084] Step S3: taking out the solid reaction product, washing it, and drying it.

[0085] In one example, the drying temperature is below 80° C., such as 40° C. to 70° C., to prevent excessively high temperatures from damaging the loaded polydopamine.

[0086] Furthermore, the present invention also provides an air filtering device 20.

[0087] Please refer to Figures 5 to 7 As shown, an air filter device 20 according to an embodiment includes a filter chamber housing 210 , a discharge function mechanism 220 , and the filter function mechanism 100 of any of the above examples.

[0088] The filter cavity housing 210 has an air inlet and an air outlet that are arranged opposite to each other.

[0089] The discharge function mechanism 220 is disposed in the filter chamber housing 210. The discharge function mechanism 220 has a discharge tip 221 for corona discharge.

[0090] The filter function mechanism 100 is disposed in the filter cavity housing 210. Compared to the discharge mechanism, the filter function mechanism 100 is further away from the air inlet and closer to the air outlet.

[0091] The air filter device 20 has any of the above-mentioned filtering function mechanisms 100 , and thus can have all the features and advantages of the above-mentioned filtering function mechanisms 100 .

[0092] The air filter device 20 also includes a discharge mechanism 220 within the filter housing 210. This mechanism includes a discharge tip 221 for corona discharge. This mechanism charges particles in the airflow entering through the air inlet. The filter element 120 is then charged by the electric field. As charged particles pass through the filter element 120, they are attracted by the opposite charge, resulting in their capture. Consequently, the air filter device 20 achieves high efficiency, low resistance, and a high dust holding capacity.

[0093] The air filter device 20 integrates multiple related components into a filter module, which can easily replace the traditional filter unit in the air conditioner 30 system, which is efficient and convenient.

[0094] like Figure 5 As shown, in one example, the filter chamber housing 210 is a cylindrical structure, one end of which is set as an air inlet and the other end is set as an air outlet. The cross section of the filter chamber housing 210 can be, but is not limited to, a square ring, a circular ring, etc.

[0095] Optionally, the discharge tip 221 may be, but is not limited to, a carbon brush, a tungsten steel needle, a tungsten needle, a copper needle, a stainless steel needle, a molybdenum needle, or the like.

[0096] Please further combine Figure 8 and Figure 9 In one example, the discharge mechanism 220 further includes a conductive perforated plate 222 and a support frame 223. The support frame 223 is spaced apart from and opposite the conductive perforated plate 222. The support frame 223 is closer to the filtering mechanism 100 than the conductive perforated plate 222. A discharge tip 221 is disposed on the support frame 223, located between the conductive perforated plate 222 and the support frame 223 and facing the conductive perforated plate 222.

[0097] Preferably, the conductive perforated plate 222 and the support frame 223 are arranged in parallel to ensure uniform discharge.

[0098] In one example, the discharge mechanism 220 further includes a support column 224, which is disposed between the conductive perforated plate 222 and the support frame 223, with its ends respectively connected to the conductive perforated plate 222 and the support frame 223. The support column 224 improves the overall structural stability of the discharge mechanism 220.

[0099] The number of support columns 224 is not limited to one, and there may be multiple support columns 224, which can be set according to the cross-sectional size of the device to ensure the structural stability of the discharge function mechanism 220. Figure 9In the specific example shown, there are four support columns 224 , which are respectively disposed at four corners of the conductive aperture plate 222 and the support frame 223 to ensure that the conductive aperture plate 222 and the support frame 223 are parallel.

[0100] Preferably, the discharge tip 221 is perpendicular to the conductive aperture plate 222 .

[0101] In one example, the distance between the discharge tip 221 and the conductive perforated plate 222 is 1 cm to 2 cm, specifically 1 cm, 1.2 cm, 1.4 cm, 1.6 cm, 1.8 cm, 2 cm, etc. In this way, the discharge intensity can be ensured.

[0102] Optionally, the number of the discharge tips 221 is not limited to one, and may be multiple, for example, 2 to 50, specifically 4, 10, 15, 20, 30, 40, etc.

[0103] In one example, the plurality of discharge tips 221 are evenly distributed on the support frame 223 .

[0104] In one example, the distribution density of the discharge tips 221 is 25 cm 2 / piece~100cm 2 / piece, specifically for example 30cm 2 / piece, 50cm 2 / piece, 70cm 2 / piece, 80cm 2 / piece, 100cm 2 / etc.

[0105] In one example, the opening area of ​​the conductive perforated plate 222 accounts for 50% to 80%, specifically 50%, 55%, 60%, 65%, 70%, 75%, etc. The above range can ensure the discharge intensity of the discharge tip 221 while reducing airflow resistance.

[0106] like Figure 8 As shown, in one example, the conductive perforated plate 222 is provided with a plurality of alignment holes 2221, and the plurality of alignment holes 2221 correspond one to one with the plurality of discharge tips 221. The number of alignment holes 2221 is, for example, 2 to 50, specifically, 4, 10, 15, 20, 30, 40, etc. The shape of the alignment holes 2221 can be, but not limited to, triangular, polygonal, circular, etc. Figure 8 In the specific example shown, the number of the alignment holes 2221 is 9 and the shape is a regular hexagon.

[0107] Furthermore, each discharge tip 221 faces the geometric center of the corresponding alignment hole 2221 , so that a stable electric field can be formed between the discharge tip 221 and the conductive aperture plate 222 .

[0108] In one example, the conductive perforated plate 222 is further provided with a plurality of resistance reducing holes 2222, and the plurality of resistance reducing holes 2222 are distributed between adjacent alignment holes 2221. By providing a plurality of resistance reducing holes 2222, the resistance of the conductive perforated plate 222 to the airflow can be reduced.

[0109] The shape of the resistance reduction hole 2222 can be, but is not limited to, a triangle, a polygon, a circle, etc. Figure 8 In the specific example shown, the shape of the resistance reduction hole 2222 is a triangle, a diamond, etc.

[0110] The support frame 223 includes a frame body 2231 and conductive lines 2232 distributed on the frame body 2231. The conductive lines 2232 are connected to the discharge tip 221 to supply power to the discharge tip 221.

[0111] The frame body 2231 preferably has a smaller area to reduce airflow resistance while ensuring structural strength.

[0112] In one example, the frame body 2231 includes an annular frame and a plurality of support beams. The plurality of support beams are connected to the annular frame and extend toward the inner hole of the annular frame to the position of the discharge tip 221. This ensures that each discharge tip 221 is energized while minimizing airflow resistance.

[0113] In one example, the discharge function mechanism 220 further includes a second power source 225 , and the second power source 225 is connected to the conductive perforated plate 222 and the conductive circuit 2232 via a second conductive elastic piece 226 .

[0114] It is understood that in other examples, the discharge function mechanism 220 may also be connected to an external power source.

[0115] Furthermore, the present invention also provides an air conditioner 30.

[0116] Please refer to Figure 10 As shown, an air conditioner 30 according to one embodiment includes a housing (not shown), an air flow passage, a temperature control device 320, a fan 330, and an air filter 20 according to any of the above examples. The air flow passage is at least partially disposed within the housing. The temperature control device 320, the fan 330, and the air filter 20 are respectively disposed in the air flow passage.

[0117] The air conditioner 30 includes any of the air filter devices 20 described above, thereby having all the features and advantages of the air filter device 20 described above.

[0118] Since the air filter device 20 has low air flow resistance, the energy consumption of the fan 330 can also be reduced, which is energy-saving and environmentally friendly.

[0119] In one example, the airflow channel includes a fresh air channel 311, a return air channel 312, and a supply air channel 313. The supply air channel 313 has a first air inlet, a second air inlet, and an air outlet. The fresh air channel 311 and the return air channel 312 are connected to the first air inlet and the second air inlet, respectively. The airflow direction is shown by the arrows in the figure.

[0120] There can be only one air filter device 20, which is disposed in one of the fresh air duct 311, the return air duct 312, and the supply air duct 313. There can also be multiple air filter devices 20, which are disposed in at least two of the fresh air duct 311, the return air duct 312, and the supply air duct 313.

[0121] exist Figure 10 In the specific example shown, air filters 20 are each installed in the fresh air duct 311, the return air duct 312, and the air supply duct 313. A temperature control device 320 is also installed in the fresh air duct 311. The air supply duct 313 is also equipped with a temperature control device 320, a humidity control device 340, and a fan 330. The temperature control device 320, the humidity control device 340, the fan 330, and the air filter 20 are sequentially arranged in the air supply duct 313 along the airflow direction. The temperature control device 320 can be, for example, a refrigeration pipe. The humidity control device 340 can be, for example, a humidifier.

[0122] use Figure 5 Multiple experiments were conducted using the specific example of an air filter device 20 shown in Figure 1 and different filter components 120. The filter components 120 in Experimental Groups 1-6 employed porous material substrates of varying thicknesses and densities. The comparative example employed an unloaded porous material, while the example employed a polydopamine-loaded porous material, as shown in Table 1. Material density refers to the weight per square meter of material at the corresponding thickness.

[0123] In the air filter device 20, the discharge tip 221 uses a tungsten needle with a length of 2 cm. The distance between the conductive perforated plate 222 and the support frame 223 is 3 cm. The distance between the discharge tip 221 and the conductive perforated plate 222 is 1 cm. The distance between the support frame 223 and the first porous plate 111 is 5 cm. The distance between the first porous plate 111 and the second porous plate 112 is 2 cm. A voltage of 7 kV is used upstream to cause the tungsten needle to perform corona discharge to charge the particulate matter, and an electric field of 10 kV / cm is formed downstream between the first porous plate 111 and the second porous plate 112 to polarize and charge the filter component 120. The experimental airflow velocity is 1 m / s.

[0124] Table 1

[0125]

[0126]

[0127] The filtration efficiency of the above experimental groups 1 to 6 for 0.3 micron particles is as follows Figure 11 As shown in Figure 2, it can be seen that compared with the unloaded porous material, the porous material loaded with polydopamine has a significantly improved filtration efficiency of particulate matter.

[0128] The resistance of experimental groups 1 to 6 to 1 m / s airflow is as follows Figure 12 As shown, compared with the unloaded porous material, the porous material loaded with polydopamine has a lower airflow resistance.

[0129] In addition, commercially available coarse-effect filters 1 to 6 and commercially available medium-effect filters were tested and compared with the above-mentioned Examples 1 to 6. The experimental results of the filtration efficiency of 0.3 micron particles and the resistance at a headwind speed of 1 m / s are shown in Table 2.

[0130] As shown in Table 2, compared to commercially available coarse-efficiency filters 1-6 and medium-efficiency filters, Examples 1-6 significantly improved their filtration efficiency for 0.3-micron particles. Furthermore, compared to commercially available medium-efficiency filters, Examples 1-6 significantly reduced their resistance at a headwind speed of 1 m / s, reaching the same level as, or even lower than, commercially available coarse-efficiency filters.

[0131] Table 2

[0132]

[0133] Experimental group 7 used Figure 5 The air filter device 20 of the specific example shown in the figure is fed with airflows having a particle concentration of 140,000 particles / liter and 700,000 particles / liter, and airflows having particle sizes of 0.3 microns, 0.5 microns and 1 micron, for filtration.

[0134] The filter element 120 in the air filter device 20 is made of PET loaded with polydopamine. Other experimental conditions are the same as those of experimental groups 1 to 6. The filtration efficiency of particulate matter was tested, and the experimental results are as follows: Figure 13 As shown in FIG. 1 , it can be seen that as the concentration of the particulate pollutants increases, the filtration efficiency of the air filter device 20 increases. As the size of the particulate pollutants increases, the filtration efficiency of the air filter device 20 also increases.

[0135] Experimental group 8 used Figure 5The specific example of the air filter device 20 shown in FIG was tested at different discharge voltages (0, 3, 5, 6, 7, 8, and 9 kV) of the discharge tip 221 and different polarization voltages (0 and 20 kV). The filter element 120 in the air filter device 20 was made of PET loaded with polydopamine. Other experimental conditions were the same as those of experimental groups 1 to 6. The experimental results are shown in FIG. Figure 14 As shown in the figure, it can be seen that the filtration efficiency for 0.3 micron particles increases with the increase of discharge voltage, and the filtration efficiency is higher when the discharge voltage is between 5V and 9V. Compared with the case where no polarization voltage is applied (polarization voltage is 0), the filtration efficiency for 0.3 micron particles is higher when polarization voltage is applied (polarization voltage is 20kV).

[0136] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] The above-described embodiments merely represent several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims, and the description may be used to interpret the content of the claims.

Claims

1. A filtering mechanism, characterized in that: include: An electric field polarization component, comprising a first porous electrode plate and a second porous electrode plate arranged opposite to and spaced apart from each other, wherein the first porous electrode plate is a wire mesh structure and the second porous electrode plate is a wire mesh structure; as well as A filter component is arranged between the first porous electrode plate and the second porous electrode plate, and the filter component includes a porous material matrix and polydopamine loaded on the porous material matrix. The porosity of the porous material matrix is ​​92% to 97%, and the resistance per unit millimeter of thickness of the porous material matrix is ​​below 5 Pa at a filtering wind speed of 1 m / s. The open area of ​​the first porous electrode plate accounts for 70% to 85%, and the open area of ​​the second porous electrode plate accounts for 70% to 85%. The filter component is connected to the second porous electrode plate, and the filter component covers all the air pores on the second porous electrode plate. The distance between the filter component and the other is 3 mm to 10 mm.

2. The filtering function mechanism according to claim 1, characterized in that: The preparation method of the filter element comprises the following steps: immersing the porous material matrix in a buffer solution and stirring to obtain a mixed solution; adding dopamine hydrochloride solution to the mixed solution and stirring to react; The solid reaction product is removed, washed, and dried.

3. The filtering function mechanism according to claim 1, wherein: The material of the porous material matrix is ​​selected from at least one of aramid, PET, PE, activated carbon and glass fiber.

4. The filtering function mechanism according to claim 1, wherein: The porous material matrix is ​​prepared by melt-blowing or electrostatic spinning.

5. An air filter device, characterized in that: include: The filter chamber housing has an air inlet and an air outlet arranged opposite to each other; A discharge function mechanism is disposed in the filter cavity housing, and the discharge function mechanism has a discharge tip; as well as The filtering function mechanism according to any one of claims 1 to 4, arranged in the filter cavity housing, wherein the filtering function mechanism is further away from the air inlet and closer to the air outlet than the discharge function mechanism; The discharge function mechanism also includes a conductive perforated plate and a support frame. The support frame is opposite to the conductive perforated plate and is arranged at a distance. Compared with the conductive perforated plate, the support frame is closer to the filtering function mechanism. The discharge tip is arranged on the support frame. The discharge tip is located between the conductive perforated plate and the support frame and faces the conductive perforated plate. The conductive perforated plate and the support frame are arranged in parallel to ensure uniform discharge. The opening area of ​​the conductive perforated plate accounts for 50% to 80%. There are multiple discharge tips, and the multiple discharge tips are evenly distributed on the support frame.

6. The air filter device according to claim 5, wherein: The distribution density of the discharge tip is 25cm 2 / piece~100cm 2 / indivual.

7. The air filter device according to claim 5, wherein: The distance between the discharge tip and the conductive perforated plate is 1 cm to 2 cm.

8. The air filter device according to claim 5, wherein: The conductive perforated plate is provided with a plurality of alignment holes, and the plurality of alignment holes correspond one-to-one to the plurality of discharge tips, and each discharge tip faces the geometric center of the corresponding alignment hole.

9. The air filter device according to claim 8, wherein: The conductive perforated plate is further provided with a plurality of resistance reducing holes, and the plurality of resistance reducing holes are distributed between adjacent alignment holes.

10. An air conditioner, characterized in that: It comprises a chassis, an air flow channel, a temperature regulating device, a fan and an air filter device according to any one of claims 5 to 9, wherein the air flow channel is at least partially arranged in the chassis, and the temperature regulating device, the fan and the air filter device are respectively arranged in the air flow channel.

Images