Filter element and air purifier

Abstract

The utility model provides a filter element and an air purifier. The filter element comprises an HEPA (High Efficiency Particulate Air) device and a negative ion generator, the HEPA device comprises a framework and an HEPA filter screen, the HEPA filter screen is fixed in the framework, the air inlet surface and the air outlet surface of the HEPA filter screen are at least partially coated with negative ion coating, the inner wall of the framework is also coated with negative ion coating, and the negative ion coating has conductivity; the negative ion generator comprises a plurality of conductive metals and a plurality of electrodes; the conductive metal is arranged between the air inlet surface and the air outlet surface of the HEPA filter screen and the inner wall of the framework; the conductive metal is connected with the region, coated with the negative ion coating, in the HEPA filter screen and the inner wall of the framework; one electrode is electrically connected to the conductive metal on one side of the air inlet surface of the HEPA filter screen, and the other electrode is electrically connected to the conductive metal on one side of the air outlet surface of the HEPA filter screen; the electrodes are used for being connected with a power port of the air purifier and discharge the negative ion coating after being powered on so that the negative ion coating can release negative ions. Therefore, the purification efficiency of the filter element is greatly improved, and the purification effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air purification, and in particular relates to a filter element and an air purifier. Background Art

[0002] At present, the air purifiers on the market generally purify particulate pollutants by driving the air through the filter through the fan, and the filter in the filter element passively intercepts and purifies the particulate pollutants in the air. However, the purification efficiency of the purification method that only passively intercepts and purifies the particulate pollutants in the air through the filter is low. In addition, the purification effect of this purification method mainly depends on the pore size of the filter material used in the filter. Particulate pollutants with a volume smaller than the pore size of the filter material are difficult to filter and purify, and the purification effect is poor. Utility Model Content

[0003] The technical purpose of the utility model is to provide a filter element and an air purifier, aiming to solve the problem of low purification efficiency and poor purification effect of the filter elements of air purifiers currently on the market.

[0004] In order to solve the above technical problems, the utility model is implemented as follows: a filter element comprises: a HEPA device and a negative ion generator;

[0005] The HEPA device comprises a frame and a HEPA filter, wherein the HEPA filter is fixed in the frame, the air inlet surface and the air outlet surface of the HEPA filter are at least partially coated with negative ion paint, and the inner wall of the frame is also coated with the negative ion paint, and the negative ion paint is conductive;

[0006] The negative ion generator includes a plurality of conductive metals and a plurality of electrodes;

[0007] The conductive metal is disposed between the air inlet surface and the air outlet surface of the HEPA filter and the inner wall of the frame, and the conductive metal connects the area of ​​the HEPA filter coated with the negative ion paint and the inner wall of the frame;

[0008] One electrode is electrically connected to the conductive metal on the air inlet side of the HEPA filter, and the other electrode is electrically connected to the conductive metal on the air outlet side of the HEPA filter; each electrode is used to connect to the power port of the air purifier, and when the electrode is energized, it discharges the negative ion paint to cause the negative ion paint to release negative ions.

[0009] Furthermore, the HEPA filter is in the shape of a hollow cylinder and has a circular ring-shaped radial cross section; the outer wall of the HEPA filter is the air inlet surface, and the inner wall of the HEPA filter is the air outlet surface.

[0010] Furthermore, the HEPA device includes HEPA filter paper, which is folded along the length direction to form a plurality of evenly arranged serrated HEPA folds, and the HEPA filter paper is connected end to end along the arrangement direction of the HEPA folds to form the HEPA filter.

[0011] Furthermore, the negative ion coating is coated on the inner wall and the outer wall of the HEPA filter and on at least part of the tooth tops of the HEPA folds.

[0012] Furthermore, the skeleton includes a first filter screen and a second filter screen, the first filter screen and the second filter screen are both hollow cylindrical and have a circular ring in radial cross section; the first filter screen is sleeved outside the outer wall of the HEPA device, and the inner wall of the HEPA device is sleeved outside the second filter screen;

[0013] The inner wall of the first filter is coated with the negative ion paint, the outer wall of the second filter is coated with the negative ion paint, and the two ends of the HEPA filter are coated with the negative ion paint. The two ends of the first filter and the second filter are fixed and electrically connected to the electrode and the areas with the negative ion paint at the two ends of the HEPA filter.

[0014] Furthermore, the framework further comprises a first end cap and a second end cap;

[0015] The first end cap and the second end cap are respectively covered on the two ends of the first filter, the second filter and the HEPA filter along the axial direction, so that the two ends of the first filter are fixed between the first end cap, the second end cap and the outer wall of the HEPA filter, and the two ends of the second conductive layer are fixed between the first end cap, the second end cap and the inner wall of the HEPA filter.

[0016] Further, the conductive metal includes a first conductive metal and a second conductive metal, and the electrode includes a first electrode and a second electrode;

[0017] The first conductive metal and the first electrode are fixed between one end of the HEPA filter and the corresponding first end cap / the second end cap;

[0018] The second conductive metal and the second electrode are fixed between one end of the HEPA filter and the corresponding first end cap / second end cap;

[0019] The first end cover and / or the second end cover is provided with through holes for leading out the first electrode and the second electrode.

[0020] Furthermore, the first conductive metal and the second conductive metal are in a circular ring shape, and the first conductive metal and the second conductive metal are arranged concentrically with a radial cross section of the HEPA filter element.

[0021] Furthermore, the negative ion paint contains bamboo charcoal components.

[0022] The utility model also provides an air purifier, comprising a housing, a fan and the filter element as described above;

[0023] The fan and the filter element are fixed to the housing, and the fan is used to drive the air to be purified from the air inlet side of the filter element to the air outlet side of the filter element to obtain purified air.

[0024] Compared with the prior art, the filter element and air purifier in the utility model have the following beneficial effects: the filter element in the utility model is based on HEPA (high efficiency particulate air filter), and negative ion coating is applied on the air inlet and air outlet surfaces of the HEPA filter and the frame for fixing the HEPA filter, and the negative ion coating on the HEPA filter, the negative ion coating on the frame and the electrode are electrically connected through conductive metal, so that an electric field is formed between the air inlet and air outlet surfaces of the HEPA filter, and high voltage discharge is input through the electrode to promote the negative ion coating on the HEPA filter to release negative ions. These negative ions can actively absorb particles of several microns to tens of microns in the air, causing the particles to settle or be adsorbed on the coating surface, greatly increasing the purification efficiency of the filter element and improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the filter element in the embodiment of the utility model from the first perspective;

[0026] Figure 2 2 is a schematic diagram of the structure of the filter element in the embodiment of the utility model from a second viewing angle;

[0027] Figure 3 yes Figure 2 The cross-sectional view along the AA direction;

[0028] Figure 4 yes Figure 3 Enlarged view of detail C and detail D;

[0029] Figure 5 yes Figure 2 The cross-sectional view along the BB direction;

[0030] Figure 6 yes Figure 5 A magnified view of detail D;

[0031] Figure 7 yes Figure 5The cross-sectional view along the EE direction and the enlarged view of detail F;

[0032] Figure 8 is a comparison chart of CADR values ​​between Test Example 1 and Comparative Example 1;

[0033] Fig. 9 It is a comparison chart of CADR values ​​between Test Example 2 and Comparative Example 2.

[0034] In the accompanying drawings, the various reference numerals represent: 1. HEPA device; 1a. air inlet surface; 1b. air outlet surface; 11. frame; 111. first filter; 112. second filter; 113. first end cover; 114. second end cover; 12. HEPA filter; 121. tooth top; 2. negative ion generator; 21. first conductive metal; 22. second conductive metal; 23. first electrode; 24. second electrode; 3. negative ion paint. DETAILED DESCRIPTION

[0035] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Example:

[0039] like Figures 1 to 9 As shown, in this embodiment, a filter element includes: a HEPA device 1 and a negative ion generator 2;

[0040] The HEPA device 1 includes a frame 11 and a HEPA filter 12, wherein the HEPA filter 12 is fixed in the frame 11, and the air inlet surface 1a and the air outlet surface 1b of the HEPA filter 12 are at least partially coated with a negative ion coating 3, and the inner wall of the frame 11 is also coated with a negative ion coating 3, and the negative ion coating 3 is conductive;

[0041] The negative ion generator 2 includes a plurality of conductive metals and a plurality of electrodes;

[0042] The conductive metal is disposed between the air inlet surface 1a and the air outlet surface 1b of the HEPA filter 12 and the inner wall of the frame 11, and the conductive metal connects the area of ​​the HEPA filter 12 coated with the negative ion coating 3 and the inner wall of the frame 11;

[0043] One electrode is electrically connected to the conductive metal on the air inlet side 1a of the HEPA filter 12, and the other electrode is electrically connected to the conductive metal on the air outlet side 1b of the HEPA filter 12; each electrode is used to connect to the power port of the air purifier, and when the electrode is energized, it discharges the negative ion paint 3 to make the negative ion paint 3 release negative ions.

[0044] The filter element in this embodiment can passively filter particulate matter. It should be noted that HEPA refers to a high-efficiency particulate air filter. Under normal circumstances, the HEPA filter 12 can efficiently filter particles of 0.3 μm and above. At the same time, it also has a certain filtering effect on particles with a smaller particle size (such as 0.09 μm to 1.0 μm), but the purification efficiency is relatively low.

[0045] The filter element in this embodiment can also actively release negative ions to adsorb particulate matter, filter particulate matter with a particle size ranging from a few microns to tens of microns, and effectively improve the purification efficiency.

[0046] First, the air inlet surface 1a and the air outlet surface 1b of the HEPA filter 12 are coated with negative ion paint 3, and the inner wall of the frame 11 is also coated with negative ion paint 3. The negative ion paint 3 usually includes a negative ion generating material. When the surface of the negative ion generating material (such as bamboo charcoal) contacts the air, it will naturally release negative ions into the air. After the negative ions contact the particulate matter or harmful gas in the air, the negative ions and the particulate matter or harmful gas are adsorbed or chemically reacted, so that the particulate matter is decomposed or deposited, thereby playing a role in purifying the air.

[0047] Secondly, since the inner wall of the skeleton 11 is coated with negative ion paint 3, the negative ion paint 3 is conductive, and the HEPA filter 12 is fixed in the skeleton 11, it can be known that the inner walls of the skeleton 11 that are arranged opposite to the air inlet surface 1a and the air outlet surface 1b of the HEPA filter 12 are equivalent to the two poles of the capacitor; the negative ion generator 2 includes multiple conductive metals and multiple electrodes, and the conductive metals are arranged between the air inlet surface 1a, the air outlet surface 1b of the HEPA filter 12 and the inner wall of the skeleton 11, one electrode is electrically connected to the conductive metal on the air inlet surface 1a side of the HEPA filter 12, and the other electrode is electrically connected to the conductive metal on the air outlet surface 1b side of the HEPA filter 12. The negative ion generator 2 arranged in this way forms an electric field in the skeleton 11, and the HEPA filter 12 is fixed in the electric field. After the electrodes of the negative ion generator 2 are energized, discharge is carried out through the electric field, and the molecules in the air are ionized to generate positive and negative ions. Negative ions are adsorbed or chemically reacted with particulate matter or harmful gases, and positive ions are attracted by the negative ion generating material in the negative ion coating 3, further causing the negative ion generating material to release more negative ions. The negative ion generator 2 and the negative ion coating 3 form a positive feedback, greatly improving the efficiency of generating negative ions, improving the efficiency of actively releasing negative ions to adsorb particulate matter, and increasing the purification efficiency of the air purifier.

[0048] In addition, the main function of the skeleton 11 is to support the HEPA filter 12, so that the HEPA filter 12 is fixed into various shapes, so as to be suitable for various air purifiers. In this embodiment, the skeleton 11 is also coated with a negative ion coating 3. On the basis of ensuring that the coating thickness of the negative ion coating 3 is appropriate, the coating area of ​​the negative ion coating 3 is cleverly increased, thereby increasing the coating amount of the negative ion coating 3, increasing the amount of negative ions generated, and improving the purification efficiency of the air purifier.

[0049] The negative ion coating 3 of the frame 11 and the HEPA filter 12 is connected by a conductive metal. The conductive metal can be a copper sheet, a copper bar or a metal of other shapes and materials, which is not limited here.

[0050] Furthermore, if Figure 1 and 2 As shown, the HEPA filter 12 is in a hollow cylindrical shape and has a circular ring shape in radial cross section; the outer wall of the HEPA filter 12 is the air inlet surface 1a, and the inner wall of the HEPA filter 12 is the air outlet surface 1b.

[0051] The annular HEPA filter 12 has a larger air filtering area under the condition of the same volume, and can be applied to a variety of air purifiers.

[0052] Furthermore, if Figure 3 and 4As shown, the HEPA device 1 includes HEPA filter paper, which is folded along the length direction to form a plurality of evenly arranged serrated HEPA folds, and the HEPA filter paper is connected end to end along the arrangement direction of the HEPA folds to form a HEPA filter 12.

[0053] The HEPA filter 12 formed by folding the HEPA filter paper has higher support strength, a larger air filtration area under the same volume, and higher air purification efficiency.

[0054] Preferably, the number of HEPA folds formed by folding each meter of HEPA filter paper is 25 to 30. This is only an example of HEPA folds and does not limit the number of HEPA folds. Technicians can design the corresponding number of HEPA folds according to the actual needs of different models of air purifiers.

[0055] Furthermore, the inner wall and the outer wall of the HEPA filter 12 and at least the tooth tops 121 of some of the HEPA folds are coated with negative ion coating 3 .

[0056] Preferably, the inner wall and outer wall of the HEPA filter 12 and the tooth tops 121 of all the HEPA folds are evenly coated with negative ion coating 3. The coating width of the negative ion coating 3 is 6% to 15% of the cross-sectional length of the HEPA fold along the axial direction of the HEPA filter 12.

[0057] Such an arrangement can not only save the negative ion paint 3, but also realize efficient ionization to generate negative ions, and will not affect the function of the HEPA filter 12 to filter particulate matter.

[0058] It can be understood that in other embodiments, the negative ion coating 3 can be coated on evenly spaced HEPA folds, or a plurality of HEPA folds can be grouped together and multiple groups of spaced HEPA folds can be coated with the negative ion coating 3 .

[0059] Furthermore, if Figure 5 and 6 As shown, the skeleton 11 includes a first filter screen 111 and a second filter screen 112, both of which are hollow cylindrical and have a circular ring in radial cross section; the first filter screen 111 is sleeved outside the outer wall of the HEPA device 1, and the inner wall of the HEPA device 1 is sleeved outside the second filter screen 112;

[0060] The inner wall of the first filter 111 is coated with negative ion paint 3, the outer wall of the second filter 112 is coated with negative ion paint 3, and the two ends of the HEPA filter 12 are coated with negative ion paint 3. The two ends of the first filter 111 and the second filter 112 are fixed and electrically connected to the electrode and the area with negative ion paint 3 at the two ends of the HEPA filter 12.

[0061] The first filter 111 can be spaced apart from the outer wall of the HEPA filter 12, and electrically connected to the negative ion coating 3 on the HEPA filter 12 through the conductive metal; the first filter 111 can also be attached to the outer wall of the HEPA filter 12, that is, the first filter 111 can be attached to the tooth top 121 on one side of the HEPA fold. The structure of the second filter 112 and the first filter 111 are similar, and will not be repeated here.

[0062] Specifically, Figure 5 and 6 As shown, the first filter 111 and the second filter 112 are spaced apart from the HEPA filter 12. The first filter 111 and the second filter 112 provide support for the HEPA filter 12. On the other hand, the apertures of the first filter 111 and the second filter 112 are larger than those of the HEPA filter 12, and can also provide preliminary filtering.

[0063] Furthermore, if Figure 1~2 As shown, the skeleton 11 further includes a first end cover 113 and a second end cover 114;

[0064] like Figure 5 and 6 As shown, the first end cap 113 and the second end cap 114 are respectively covered on the two ends of the first filter 111, the second filter 112 and the HEPA filter 12 along the axial direction, so that the two ends of the first filter 111 are fixed between the first end cap 113, the second end cap 114 and the outer wall of the HEPA filter 12, and the two ends of the second conductive layer are fixed between the first end cap 113, the second end cap 114 and the inner wall of the HEPA filter 12.

[0065] Specifically, the first end cap 113 and the second end cap 114 are made of insulating material. The first end cap 113 and the second end cap 114 are in the shape of a ring, and their function is to tightly fix the first filter 111, the second filter 112, the conductive metal and the electrode to the HEPA filter 12. The filter element is arranged in this way, and the skeleton 11 is easy to disassemble and assemble, and the conductive metal, the electrode and the HEPA filter 12 can all be replaced. During use, the negative ion coating 3 can also be replenished, the maintenance cost is low, and each part can be replaced, and the service life can be extended, which is economical and environmentally friendly.

[0066] Furthermore, if Figure 5 and Figure 6 As shown, the conductive metal includes a first conductive metal 21 and a second conductive metal 22, and the electrode includes a first electrode 23 and a second electrode 24;

[0067] The first conductive metal 21 and the first electrode 23 are fixed between one end of the HEPA filter 12 and the corresponding first end cap 113 / second end cap 114;

[0068] The second conductive metal 22 and the second electrode 24 are fixed between one end of the HEPA filter 12 and the corresponding first end cap 113 / second end cap 114;

[0069] The first end cover 113 and / or the second end cover 114 are provided with through holes for leading out the first electrode 23 and the second electrode 24 .

[0070] It can be understood that the first conductive metal 21 and the second conductive metal 22 can be disposed at the same end or different ends of the HEPA filter 12. The first conductive metal 21 and the second conductive metal 22 are preferably copper rings.

[0071] The first electrode 23 and the second electrode 24 are respectively a positive electrode and a negative electrode. In other embodiments, the first electrode 23 and the second electrode 24 can also be respectively a negative electrode and a positive electrode.

[0072] Furthermore, if Figure 7 As shown, the first conductive metal 21 and the second conductive metal 22 are in a circular shape, and the first conductive metal 21 and the second conductive metal 22 are arranged concentrically with the radial cross section of the HEPA filter element.

[0073] Furthermore, the negative ion paint 3 contains bamboo charcoal components.

[0074] Bamboo charcoal is a carbon material made by carbonizing bamboo under high temperature conditions. Its surface has a rich microporous structure and has good adsorption properties and negative ion release capabilities.

[0075] In this embodiment, the negative ion paint 3 is selected from bamboo charcoal formaldehyde-free paint. Finished paint can be selected, such as Huali Forest brand bamboo charcoal formaldehyde-free paint. The cost of coating the filter element with the negative ion paint 3 is low, and the negative ion paint 3 is easy to obtain. It can be understood that the utility model does not limit the specific model and composition of the negative ion paint 3, as long as it contains bamboo charcoal.

[0076] The utility model also provides an air purifier, comprising a housing, a fan and the above filter element;

[0077] The fan and the filter element are fixed to the housing, and the fan is used to drive the air to be purified from the air inlet side of the filter element to the air outlet side of the filter element to obtain purified air.

[0078] Specifically, the steps for preparing the filter element of the air purifier include:

[0079] Preparation of HEPA filter 12

[0080] a. Fold the 1.8~2m HEPA filter paper along the length direction to form a number of evenly arranged zigzag HEPA folds, the number of HEPA folds is 40~60;

[0081] b. At an ambient temperature of 10 ℃ ~ 40 ℃ and an ambient humidity of 40% ~ 80%, the top of the HEPA fold 121 is coated with a layer of negative ion paint 3 having a width of 6 ~ 10mm, wherein the negative ion paint 3 is bamboo charcoal formaldehyde-free paint, and the coating amount is 50 ~ 80g / m²;

[0082] c. After coating, place the coating at 25±5℃ and 50±10% humidity for more than 2 hours;

[0083] d. Apply hot melt adhesive along the arrangement direction of the HEPA folds, so that the ends are bonded to form a cylindrical HEPA filter 12, wherein the hot melt adhesive temperature is 165°C ~ 185°C.

[0084] Assemble negative ion generator 2

[0085] e. Coat one side surface of the first filter 111 and the second filter 112 with a conductive medium bamboo charcoal formaldehyde-free paint, and then assemble the first filter 111 and the second filter 112 to the outer wall and the inner wall of the HEPA filter 12 respectively, so that the first filter 111 and the second filter 112 cover the air inlet surface 1a and the air outlet surface 1b of the HEPA filter 12;

[0086] f. Apply hot melt adhesive to the surface of the second end cover 114, so that the side of the second end cover 114 coated with hot melt adhesive faces one end of the HEPA filter 12 along the axial direction, and cover the second end cover 114 to the first filter 111, the second filter 112 and one end of the HEPA filter 12 along the axial direction, so that one end of the first filter 111 and the second filter 112 are fixed to the HEPA filter 12;

[0087] g. The first conductive metal 21 is disposed around the outer circumference of the HEPA filter 12 away from the second end cap 114, so that the first conductive metal 21 contacts the HEPA filter 12 coated with bamboo charcoal formaldehyde paint area and the inner wall of the first filter 111 coated with negative ion paint 3 area;

[0088] h. The second conductive metal 22 is disposed around the inner circumference of the HEPA filter 12 away from the second end cap 114, so that the second conductive metal 22 contacts the HEPA filter 12 coated with bamboo charcoal formaldehyde paint area and the inner wall of the second filter 112 coated with negative ion paint 3 area;

[0089] i. Welding the first electrode 23 and the second electrode 24 on the first conductive metal 21 and the second conductive metal 22, respectively;

[0090] j. Coat the surface of the first end cap 113 with hot melt adhesive, so that the side of the first end cap 113 coated with hot melt adhesive faces the other end of the HEPA filter 12 along the axial direction, and cover the first end cap 113 to the first filter 111, the second filter 112 and the other end of the HEPA filter along the axial direction, so that the other ends of the first filter 111 and the second filter 112 are fixed to the HEPA filter 12; wherein, the surface of the first end cap 113 is provided with through holes for leading out the first electrode 23 and the second electrode 24.

[0091] Here are some test examples:

[0092] Test Example 1

[0093] A filter element is prepared based on the preparation steps of the filter element of the air purifier, wherein the length of the HEPA filter paper in the filter element is 1.8m, the number of HEPA folds is 50, and the tooth tops 121 of the HEPA folds are evenly coated with bamboo charcoal formaldehyde-free paint with a width of 6mm, and the coating amount is 60g / m². The inner walls of the first filter screen 111 and the second filter screen 112 are evenly coated with bamboo charcoal formaldehyde-free paint, and the coating thickness is the same as the thickness of the tooth tops 121 of the HEPA folds. The first conductive metal 21 and the second conductive metal 22 are both copper rings.

[0094] The filter element in this test example is installed in the air purifier model PGA156-PS-AIR260-2001, and the air purifier is placed in a 30m³ test chamber for testing and verification according to the requirements of GB / T18801-2022 standard.

[0095] After the air purifier in Test Example 1 is powered on (220V-50HZ), the first electrode 23 and the second electrode 24 of the filter element are connected to a 12V, 2A power supply for testing and verification. The air purifier is powered by a variable frequency power supply, the gear is set to the highest gear, and the data is recorded by a dust particle counter. The test environment is "ambient temperature 23±2℃, ambient humidity 50±5%", and the test results are attached. Figure 8 .

[0096] Comparative Example 1

[0097] Based on the same filter element as that in Test Example 1, the filter element of Comparative Example 1 was also assembled into an air purifier of model PGA156-PS-AIR260-2001. The air purifier was placed in a 30m³ test chamber and tested and verified according to the requirements of GB / T18801-2022 standard.

[0098] After the air purifier in comparative example 1 is powered on (220V-50HZ), the first electrode 23 and the second electrode 24 of the filter element are not powered on. The air purifier is powered by a variable frequency power supply, the gear is set to the highest gear, and the data is recorded by a dust particle counter. The test environment is "ambient temperature 23±2℃, ambient humidity 50±5%", and the test results are attached. Figure 8 .

[0099] The CADR value refers to the clean air output rate of the air purifier, and the unit is m³ / h, which indicates the total amount of clean air output after filtering through the air purifier per unit time. Figure 8 It can be seen that in Comparative Example 1, the CADR value of the air purifier based on model PGA156-PS-AIR260-2001 reaches the standard value of 240m³ / h, while the CADR value of Test Example 1 is increased by more than 16% relative to Comparative Example 1. It can be seen that without increasing the power of the air purifier, the filter element in Test Example 1 can increase the CADR value after being powered on, thereby increasing the air purification efficiency.

[0100] Test Example 2

[0101] A filter element is prepared based on the preparation steps of the filter element of the air purifier, wherein the length of the HEPA filter paper in the filter element is 2m, the number of HEPA folds is 60, and the tooth tops 121 of the HEPA folds are evenly coated with bamboo charcoal formaldehyde-free paint with a width of 10mm, and the coating amount is 70g / m². The inner walls of the first filter screen 111 and the second filter screen 112 are evenly coated with bamboo charcoal formaldehyde-free paint, and the coating thickness is the same as the thickness of the tooth tops 121 of the HEPA folds. The first conductive metal 21 and the second conductive metal 22 are both copper rings.

[0102] The filter element in this test example is installed in the air purifier of model EPI080D, and the air purifier is placed in a 30m³ test chamber for testing and verification according to the requirements of GB / T18801-2022 standard.

[0103] After the air purifier in Test Example 2 is powered on (120V-60HZ), the first electrode 23 and the second electrode 24 of the filter element are connected to a 12V, 2A power supply for testing and verification. The air purifier is powered by a variable frequency power supply, the gear is set to the highest gear, and the data is recorded by a dust particle counter. The test environment is "ambient temperature 23±2℃, ambient humidity 50±5%", and the test results are attached. Fig. 9 .

[0104] Comparative Example 2

[0105] Based on the same filter element as that in Test Example 2, the filter element of Comparative Example 2 was also assembled into an air purifier of model EPI080D. The air purifier was placed in a 30m³ test chamber and tested and verified according to the requirements of GB / T18801-2022 standard.

[0106] After the air purifier in comparative example 2 is powered on (120V-60HZ), the first electrode 23 and the second electrode 24 of the filter element are not powered. The air purifier is powered by a variable frequency power supply, the gear is set to the highest gear, and the data is recorded by a dust particle counter. The test environment is "ambient temperature 23±2℃, ambient humidity 50±5%", and the test results are attached. Fig. 9 .

[0107] The CADR value refers to the clean air output rate of the air purifier, and the unit is m³ / h, which indicates the total amount of clean air output after filtering through the air purifier per unit time. Fig. 9 It can be seen that in Comparative Example 2, the CADR value of the air purifier based on the model EPI080D reaches the standard value of 53m³ / h, while the CADR value of Test Example 2 is increased by more than 16% relative to Comparative Example 2. It can be seen that without increasing the power of the air purifier, the filter element in Test Example 2 can increase the CADR value after being powered on, thereby increasing the air purification efficiency.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter element, It is characterized in that include: HEPA device and negative ion generator; The HEPA device comprises a frame and a HEPA filter, wherein the HEPA filter is fixed in the frame, the air inlet surface and the air outlet surface of the HEPA filter are at least partially coated with negative ion paint, and the inner wall of the frame is also coated with the negative ion paint, and the negative ion paint is conductive; The negative ion generator includes a plurality of conductive metals and a plurality of electrodes; The conductive metal is disposed between the air inlet surface and the air outlet surface of the HEPA filter and the inner wall of the frame, and the conductive metal connects the area of ​​the HEPA filter coated with the negative ion paint and the inner wall of the frame; One of the electrodes is electrically connected to the conductive metal on the air inlet side of the HEPA filter, and the other electrode is electrically connected to the conductive metal on the air outlet side of the HEPA filter; Each of the electrodes is used to connect to a power port of an air purifier. When the electrodes are powered on, they discharge the negative ion paint so that the negative ion paint releases negative ions.

2. The filter element according to claim 1, It is characterized in that The HEPA filter is in the shape of a hollow cylinder and has a circular ring shape in radial cross section; the outer wall of the HEPA filter is the air inlet surface, and the inner wall of the HEPA filter is the air outlet surface.

3. The filter element according to claim 2, It is characterized in that The HEPA device comprises HEPA filter paper, which is folded along the length direction to form a plurality of evenly arranged serrated HEPA folds, and the HEPA filter paper is connected end to end along the arrangement direction of the HEPA folds to form the HEPA filter.

4. The filter element according to claim 3, It is characterized in that The negative ion coating is coated on the inner wall and the outer wall of the HEPA filter and on at least part of the tooth tops of the HEPA folds.

5. The filter element according to claim 2, It is characterized in that The skeleton comprises a first filter screen and a second filter screen, both of which are hollow cylindrical and have a circular ring in radial cross section; the first filter screen is sleeved outside the outer wall of the HEPA device, and the inner wall of the HEPA device is sleeved outside the second filter screen; The inner wall of the first filter is coated with the negative ion paint, the outer wall of the second filter is coated with the negative ion paint, and the two ends of the HEPA filter are coated with the negative ion paint. The two ends of the first filter and the second filter are fixed and electrically connected to the electrode and the areas with the negative ion paint at the two ends of the HEPA filter.

6. The filter element according to claim 5, It is characterized in that The framework further includes a first end cap and a second end cap; The first end cover and the second end cover are respectively covered on the two ends of the first filter, the second filter and the HEPA filter along the axial direction, so that the two ends of the first filter are fixed between the first end cover, the second end cover and the outer wall of the HEPA filter, and the two ends of the second filter are fixed between the first end cover, the second end cover and the inner wall of the HEPA filter.

7. The filter element according to claim 6, It is characterized in that The conductive metal includes a first conductive metal and a second conductive metal, and the electrode includes a first electrode and a second electrode; The first conductive metal and the first electrode are fixed between one end of the HEPA filter and the corresponding first end cap / the second end cap; The second conductive metal and the second electrode are fixed between one end of the HEPA filter and the corresponding first end cap / second end cap; The first end cover and / or the second end cover is provided with through holes for leading out the first electrode and the second electrode.

8. The filter element according to claim 7, It is characterized in that The first conductive metal and the second conductive metal are in a circular ring shape, and the first conductive metal and the second conductive metal are arranged concentrically with a radial cross section of the HEPA filter.

9. The filter element according to any one of claims 1 to 8, It is characterized in that The negative ion paint contains bamboo charcoal components.

10. An air purifier, It is characterized in that It comprises a housing, a fan and a filter element as claimed in any one of claims 1 to 9; The fan and the filter element are fixed to the housing, and the fan is used to drive the air to be purified from the air inlet side of the filter element to the air outlet side of the filter element to obtain purified air.

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