CN112556067A - Formaldehyde filter screen and air treatment device - Google Patents
Formaldehyde filter screen and air treatment device Download PDFInfo
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- CN112556067A CN112556067A CN201910850389.1A CN201910850389A CN112556067A CN 112556067 A CN112556067 A CN 112556067A CN 201910850389 A CN201910850389 A CN 201910850389A CN 112556067 A CN112556067 A CN 112556067A
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- air
- filter screen
- formaldehyde filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
Abstract
The invention discloses a formaldehyde filter screen and an air treatment device, wherein the formaldehyde filter screen comprises a substrate, the substrate is provided with a plurality of vent holes extending along the thickness direction of the substrate, the cross section area of each vent hole and the hole depth of each vent hole have a depth-cut ratio, and the depth-cut ratio is greater than or equal to 0.06 and less than or equal to 2.5. Therefore, the filtering effect of the formaldehyde filter screen can be ensured; and the air resistance of the formaldehyde filter screen can be prevented from being overlarge so as to ensure the air supply quantity, thereby ensuring the performance stability of the formaldehyde filter screen.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a formaldehyde filter screen and an air treatment device.
Background
In the related art, the formaldehyde filter screen can be used for removing formaldehyde, but the cross-sectional area of the vent hole of the formaldehyde filter screen and the thickness of the formaldehyde filter screen are not limited, so that the wind resistance of the formaldehyde filter screen is easily overlarge, or the filtering effect (mainly the formaldehyde removing effect) is too poor, and the performance of the formaldehyde filter screen is unstable.
Disclosure of Invention
The invention mainly aims to provide a formaldehyde filter screen, and aims to solve the technical problem that the performance of the formaldehyde filter screen is unstable in the related technology.
In order to achieve the above object, the present invention provides a formaldehyde filter screen, which includes a substrate having a plurality of vent holes extending in a thickness direction of the substrate, wherein an area of a cross section of the vent holes and a depth of the vent holes have a depth-to-depth ratio, and the depth-to-depth ratio is greater than or equal to 0.06mm/mm2And is less than or equal to 2.5mm/mm2。
Optionally, the depth cut ratio is greater than or equal to 0.1mm/mm2And is less than or equal to 1mm/mm2。
Optionally, the cross-sectional shape of the vent hole is triangular.
Optionally, the cross-sectional shape of the vent hole is circular, and the depth cut ratio is greater than or equal to 0.06mm/mm2And is less than or equal to 1.8mm/mm2。
Optionally, the vent holes have a hole depth of greater than or equal to 3mm/mm2And less than or equal to 50 mm/mm2(ii) a And/or
The mesh number of the vent holes is greater than or equal to 30 and less than or equal to 150; and/or
The depth direction of the vent hole is inclined to the thickness direction of the substrate.
Optionally, the formaldehyde filter screen further comprises a catalytic layer, and the catalytic layer is arranged on the surface of the pore wall of the vent hole.
Optionally, the substrate is made of a material comprising a paper material; and/or the presence of a gas in the gas,
the preparation material of the catalytic layer comprises at least one of manganese dioxide and titanium dioxide.
Optionally, a plurality of inner air passing through holes are formed in the hole wall of each air hole, and the inner air passing through holes are communicated with two adjacent air holes.
The invention also provides an air treatment device, which comprises a shell and a formaldehyde filter screen, wherein the shell is provided with an air inlet, an air outlet and an air treatment air channel communicated between the air inlet and the air outlet, and the formaldehyde filter screen is arranged at the air inlet; or the formaldehyde filter screen is arranged in the air treatment air duct; or the formaldehyde filter screen is arranged at the air outlet. The formaldehyde filter screen comprises a substrate, wherein the substrate is provided with a plurality of vent holes extending along the thickness direction of the substrate, the cross section area of each vent hole and the hole depth of each vent hole have a depth-cut ratio, and the depth-cut ratio is greater than or equal to 0.06 and less than or equal to 2.5.
Optionally, the air treatment device is any one of a fan, an air machine, an air-conditioning indoor machine, an air-conditioning all-in-one machine, an air purifier and an air humidifier.
According to the formaldehyde filter screen, the depth cut ratio is greater than or equal to 0.06 and less than or equal to 2.5, so that the filtering effect of the formaldehyde filter screen can be ensured; and the air resistance of the formaldehyde filter screen can be prevented from being overlarge so as to ensure the air supply quantity, thereby ensuring the performance stability of the formaldehyde filter screen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an air treatment device according to the present invention;
FIG. 2 is a schematic structural diagram of the formaldehyde filter screen in FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic cross-sectional view of the formaldehyde filter along line I-I of FIG. 2;
FIG. 5 is a schematic cross-sectional view of another embodiment of the formaldehyde filter of the present invention;
FIG. 6 is a schematic cross-sectional view of another embodiment of the formaldehyde filter of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
1000 | |
| 10 | |
200 | |
| 11 | |
220 | Air outlet |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.
The invention provides a formaldehyde filter screen and an air treatment device.
The formaldehyde filter screen is applied to an air treatment device to remove formaldehyde in air and improve air quality. The air treatment device is a device capable of adjusting the temperature, humidity, cleanliness and the like of air, and includes, but is not limited to, fans, air machines, indoor air conditioners, all-in-one air conditioners, air purifiers, air humidifiers and the like. The indoor unit of the air conditioner comprises but is not limited to a floor type indoor unit of the air conditioner, a vertical hanging unit and a wall-mounted indoor unit of the air conditioner.
Specifically, as shown in fig. 1, the air treatment device 100 includes a housing 200, the housing 200 has an air inlet, an air outlet 220, and an air treatment duct between the air inlet and the air outlet 220, and the formaldehyde filter 100 is generally disposed at the air inlet to remove formaldehyde in the air, so that cleaner air enters the housing 200; of course, the formaldehyde filter 100 may also be disposed in the air treatment duct or at the air outlet 220.
In an embodiment of the present invention, as shown in fig. 2 to 4, the formaldehyde filter 100 includes a substrate 10, and the substrate 10 has a plurality of vent holes 11 extending in a thickness direction of the substrate 10.
Note that the substrate 10 has a plurality of vent holes 11 extending in the thickness direction of the substrate 10, that is, the substrate 10 is provided with a plurality of vent holes 11 penetrating through the substrate 10 in the thickness direction of the substrate 10, and the vent holes 11 may be parallel to the thickness direction of the substrate 10 or the depth direction of the vent holes 11 may be inclined to the thickness direction of the substrate 10.
Optionally, a plurality of the vent holes 11 are distributed on the surface of the substrate 10, and the vent holes 11 are through holes.
In the specific embodiment, in order to improve the filtering effect of the formaldehyde removing filter screen 100, the following method is adopted: 1) the first way can be that: the substrate 10 is made of a catalytic material or the substrate 10 is made of a catalytic material, which includes but is not limited to at least one of manganese dioxide, titanium dioxide, silver oxide, and the like; in this way, when air flows through the air holes 11, the catalytic material in the substrate 10 can be used as a catalyst to catalyze formaldehyde in the air to perform a (complex) chemical reaction, so as to decompose the formaldehyde into carbon dioxide and water, thereby removing the formaldehyde in the air. 2) In the second mode, the following steps can be performed: the formaldehyde filter screen 100 further comprises a catalytic layer, and the catalytic layer is arranged on the surface of the hole wall of the vent hole 11; thus, when air flows through the air vent 11, the catalytic layer catalyzes formaldehyde in the air to perform (complex) chemical reaction so as to decompose the formaldehyde into carbon dioxide and water, thereby achieving the purpose of removing the formaldehyde in the air. 3) In a third mode, the formaldehyde filter screen 100 further comprises a condensation reaction layer capable of performing condensation reaction with formaldehyde, and the condensation reaction layer is arranged on the surface of the hole wall of the vent hole 11; thus, when air flows through the air holes 11, the condensation reaction layer can perform condensation chemical reaction with formaldehyde in the air, thereby achieving the purpose of removing formaldehyde in the air. And so on.
In this embodiment, the second mode is adopted to improve the filtering effect of the formaldehyde removal filter screen 100, that is, the formaldehyde filter screen 100 further includes a catalytic layer, and the catalytic layer is disposed on the surface of the hole wall of the vent hole 11. Specifically, the preparation material of the catalytic layer comprises a catalytic material or the catalytic layer is prepared from a catalytic material, and the catalytic material comprises but is not limited to at least one of manganese dioxide, titanium dioxide, silver oxide and the like.
Specifically, when air flows through the vent 11, the catalytic material of the catalytic layer can be used as a catalyst to catalyze formaldehyde in the air to perform (complex) chemical reaction, so as to decompose the formaldehyde into carbon dioxide and water, thereby achieving the purpose of removing the formaldehyde in the air. In addition, in the decomposition process of formaldehyde, the catalyst layer only plays a role of catalysis and cannot be lost, so that the formaldehyde filter screen 100 has a long service life.
Specifically, the catalytic layer may be provided as a coating or plating layer, so that the catalytic layer is firmly attached to the surface of the hole wall of the vent hole 11, the manufacturing process of the formaldehyde filter screen 100 is simplified, and the catalytic layer can be prevented from falling off. Of course, the catalytic layer may be provided on the surface of the pore wall of the vent hole 11 by other means, such as adhesion with an adhesive.
Further, the area of the cross section of the vent hole 11 and the hole depth of the vent hole 11 have a depth cut ratio, and since the unit of the area of the cross section is different from the unit of the hole depth, the unit of the depth cut ratio can be set to mm/mm2I.e., millimeters per square millimeter; the depth cut ratio is greater than or equal to 0.06mm/mm2And is less than or equal to 2.5mm/mm2. The hole depth of the vent hole 11 is the depth/length of the vent hole 11, the cross section of the vent hole 11 is a section perpendicular to the depth direction of the vent hole 11, and the depth ratio is the ratio of the area of the cross section of the vent hole 11 to the hole depth of the vent hole 11. Wherein, the depth of the vent hole 11 is related to the thickness of the substrate 10, and the thicker the substrate 10 is, the greater the depth of the vent hole 11 is; the thinner the substrate 10 is, the smaller the depth of the vent hole 11 is.
It can be understood that the smaller the area of the cross section of the vent hole 11 is, the more vent holes 11 can be arranged on the substrate 10 with the same area, that is, the larger the mesh number of the vent holes 11 is, the larger the wind resistance of the formaldehyde filter screen 100 is, and the better the filtering effect is; conversely, the larger the cross-sectional area of the vent holes 11, the fewer the vent holes 11 provided on the substrate 10 having the same area, that is, the smaller the mesh number of the vent holes 11, the smaller the wind resistance of the formaldehyde filter 100, and the poorer the filtering effect.
The smaller the hole depth of the vent hole 11 is, the smaller the hole wall area of the vent hole 11 (which can be generally expressed by the product of the area of the cross section of the vent hole 11 and the hole depth of the vent hole 11) is, the smaller the wind resistance of the formaldehyde filter screen 100 is, and the poorer the filtering effect is; the larger the hole depth of the vent hole 11 is, the larger the hole wall area of the vent hole 11 is, the larger the wind resistance of the formaldehyde filter screen 100 is, and the better the filtering effect is.
Based on the above analysis, it is easy to know that the smaller the cut-off ratio (which can be achieved by reducing the area of the cross section of the vent hole 11 or increasing the hole depth of the vent hole 11), the larger the wind resistance of the formaldehyde filter screen 100 is, the better the filtering effect is; however, if the depth ratio is too small, the air resistance of the formaldehyde filter 100 becomes too large, and the air volume loss becomes too large, and the noise becomes too large, which is disadvantageous for the air processing apparatus 100 to blow air.
The larger the cut-depth ratio (which can be achieved by increasing the area of the cross section of the vent hole 11 or reducing the hole depth of the vent hole 11), the smaller the wind resistance of the formaldehyde filter screen 100, the poorer the filtering effect; however, if the depth ratio is too large, the filtering effect of the formaldehyde filter 100 is too poor.
Therefore, the depth-cut ratio can be made to be 0.06mm/mm or more2And is less than or equal to 2.5mm/mm2(ii) a So as to ensure the filtering effect of the formaldehyde filter screen 100; and the too large wind resistance of the formaldehyde filter screen 100 can be avoided to ensure the air supply quantity, thereby improving the stability of the performance of the formaldehyde filter screen 100.
That is, the formaldehyde filter screen 100 of the present invention is manufactured by making the depth-cut ratio greater than or equal to 0.06mm/mm2And is less than or equal to 2.5mm/mm2The filtering effect of the formaldehyde filter screen 100 can be ensured; and the too large wind resistance of the formaldehyde filter screen 100 can be avoided to ensure the air supply quantity, thereby improving the stability of the performance of the formaldehyde filter screen 100.
It is understood that, in order to further improve the stability of the performance of the formaldehyde filter screen 100, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And less than or equal to 1mm/mm2(ii) a Thereby further ensuringThe filtering effect of the formaldehyde filter screen 100; and the too large wind resistance of the formaldehyde filter screen 100 can be further avoided, so as to further ensure the air supply quantity.
More specifically, the depth cut ratio is greater than or equal to 0.18mm/mm2And less than or equal to 0.6mm/mm2。
It will be appreciated that the filtration performance of the formaldehyde filter is related to the cross-sectional shape of the vent holes 11, and the cut-off ratio is defined below in conjunction with the shape of the vent holes 11. Specifically, the cross-sectional shape of the vent hole 11 is generally polygonal or circular, and will be described below.
In the present embodiment, as shown in fig. 2 and 3, the cross-sectional shape of the vent hole 11 is triangular.
It can be understood that the triangular structure has strong stability. Based on this, in the formaldehyde filter screen 100 of the present invention, the cross-sectional shape of the vent hole 11 is set to be triangular, so that the connection between the side walls of the hole wall of the vent hole 11 is relatively stable, firm and not easy to break, thereby enhancing the overall structural strength of the formaldehyde filter screen 100, reducing the risk of damage to the formaldehyde filter screen 100, and increasing the service life of the formaldehyde filter screen 100.
Specifically, when the cross-sectional shape of the vent hole 11 is triangular, the cut-off depth ratio may be selected to be greater than or equal to 0.06mm/mm2And is less than or equal to 2.5mm/mm2. More specifically, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And is less than or equal to mm/mm2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
Of course, in other embodiments, the cross-sectional shape of the ventilation hole 11 may be a quadrangle, a pentagon, a hexagon, an octagon, a circle, or the like.
It is to be noted that, when the cross-sectional shape of the vent hole 11 is a quadrangle, the depth cut ratio may be made greater than or equal to 0.06mm/mm2And is less than or equal to 2.2mm/mm2(ii) a More specifically, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And is less than or equal to 1.5mm/mm2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
When the cross-sectional shape of the ventilation hole 11 is a pentagon, the cut-depth ratio may be made greater than or equal to 0.06mm/mm2And is less than or equal to 2.1mm/mm2(ii) a More specifically, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And is less than or equal to 1.3mm/mm2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
When the cross-sectional shape of the ventilation hole 11 is hexagonal, the depth cut ratio may be made greater than or equal to 0.06mm/mm2And is less than or equal to 2mm/mm2(ii) a More specifically, the depth cut ratio may be made 0.1 or more and 1.2mm/mm or less2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
When the cross-sectional shape of the vent hole 11 is octagonal, the depth ratio may be made greater than or equal to 0.06, and less than or equal to 1.9; more specifically, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And is less than or equal to 1.1mm/mm2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
When the cross-sectional shape of the vent hole 11 is circular, the depth cut ratio may be made greater than or equal to 0.06mm/mm2And is less than or equal to 1.8mm/mm2(ii) a More specifically, the depth cut ratio may be made greater than or equal to 0.1mm/mm2And is less than or equal to 1mm/mm2. Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm2And is less than or equal to 0.6mm/mm2。
It will be appreciated that the filtration performance and the wind resistance of formaldehyde filtration are not only related to the pore wall area of the vent holes 11, but also to the cross-sectional shape of the vent holes 11, wherein the cross-sectional shape of the vent holes 11 may influence the time for which air flows within the vent holes 11. Specifically, the cross-sectional shape of the vent hole 11 is a polygon (such as a triangle, a quadrangle, a pentagon, a hexagon, etc.) or a circle (it can be understood that a circle has infinite sides, that is, the more sides of a polygon are, the closer to a circle is, when the cross-sectional polygon is a regular polygon or an approximate regular polygon, the more sides of the cross-sectional polygon are, the larger an included angle between two adjacent sides becomes (it can also be understood that the sum of internal angles of the cross-sectional polygon is larger), so that the phenomenon that the flowing air generates eddy and turbulent flow in the vent hole 11 is less or less obvious, and the flowing speed of the air in the vent hole 11 can be made faster; therefore, for the vent holes 11 having the same cross-sectional area and the same hole depth, the more the number of sides of the cross-sectional polygon is, the shorter the time for the flowing air to flow in the vent holes 11 is, the shorter the contact time between the flowing air and the catalytic material is, the poorer the filtering effect of the formaldehyde filter screen 100 is, and the smaller the wind resistance is.
Therefore, when the number of sides of the cross-sectional polygon is increased, the size of the depth-of-cut ratio can be reduced appropriately.
In this embodiment, as shown in fig. 4, the depth direction of the vent hole 11 may be parallel to the thickness direction of the substrate 10 (tolerance), that is, the depth direction of the vent hole 11 is the thickness direction of the substrate 10, so as to reduce the difficulty in manufacturing the substrate 10 and the formaldehyde filter 100, where the depth of the vent hole 11 is the thickness of the substrate 10. Of course, in other embodiments, as shown in fig. 6, the depth direction of the vent holes 11 may be inclined to the thickness direction of the substrate 10 to increase the hole wall area of the vent holes 11, i.e., the filtering area may be increased to improve the filtering efficiency (formaldehyde removal efficiency) and the purifying effect.
In the present embodiment, the depth direction of the vent hole 11 is parallel to the thickness direction of the substrate 10 (tolerance), and the depth direction of the vent hole 11 is the thickness of the substrate 10, i.e., the depth of the vent hole 11 in the thickness direction of the substrate 10.
Further, the mesh number of the vent holes 11 is greater than or equal to 30 and less than or equal to 150.
It can be understood that the mesh number represents the distribution density of the vent holes 11, and if the mesh number of the vent holes 11 is smaller, the vent holes 11 are distributed on the formaldehyde filter screen 100 more thinly, and the filter area of the formaldehyde filter screen 100 is smaller; conversely, if the mesh number of the vent holes 11 is larger, the more densely the vent holes 11 are distributed in the formaldehyde filter 100, the larger the filter area of the formaldehyde filter 100 is, but the larger the wind resistance of the formaldehyde filter 100 is.
It can be understood that if the mesh number of the vent holes 11 is too small, the filtering area of the formaldehyde filter 100 becomes too small, and the filtering efficiency and the purification effect are greatly reduced. If the mesh number of the vent holes 11 is too large, the wind resistance of the formaldehyde filter 100 becomes too large, and the ventilation amount of the formaldehyde filter 100 is greatly reduced. The mesh number of the vent holes 11 is set to be greater than or equal to 30 and less than or equal to 150. More specifically, the mesh number of the vent holes 11 is set to be 50 or more and 120 or less. Preferably, the mesh number of the vent holes 11 is set to be greater than or equal to 80 and less than or equal to 100, so that the filtering area of the formaldehyde filter screen 100 can be ensured, and the wind resistance of the formaldehyde filter screen 100 can be reduced.
Further, the hole depth of the vent hole 11 is greater than or equal to 3mm and less than or equal to 50 mm.
It can be understood that, if the hole depth of the vent hole 11 is smaller, the flowing time of the air in the vent hole 11 is shorter, and the filtering area of the formaldehyde filtering net 100 is smaller; conversely, if the hole depth of the vent hole 11 is larger, the longer the air flows in the vent hole 11, the larger the filter area of the formaldehyde filter 100 becomes, but the larger the wind resistance of the formaldehyde filter 100 becomes.
It can be understood that if the depth of the vent holes 11 is too small, the filtering area of the formaldehyde filter 100 is too small, and the filtering efficiency and the purification effect are greatly reduced. If the depth of the vent hole 11 is too large, the wind resistance of the formaldehyde filter 100 becomes too large, and the ventilation amount of the formaldehyde filter 100 is greatly reduced. Therefore, the depth of the vent hole 11 is set to be greater than or equal to 3mm and less than or equal to 50 mm. More specifically, the hole depth of the vent hole 11 is greater than or equal to 5mm, and less than or equal to 30 mm. Preferably, the depth of the vent hole 11 is greater than or equal to 10 mm and less than or equal to 20 mm, so that the filtering area of the formaldehyde filter screen 100 can be ensured, and the wind resistance of the formaldehyde filter screen 100 can be reduced.
To facilitate an understanding of the invention, the present invention provides some experimental data, as shown below.
In the experiment provided by the invention, the cross section of the vent holes 11 is triangular, and the influence of the change of the depth ratio on the filtering effect and the wind resistance of the formaldehyde filter screen 100 is given when the mesh number of the vent holes 11 is 60 meshes, 70 meshes, 95 meshes and 120 meshes respectively; wherein, the wind resistance is represented by the loss rate of the air quantity after the flowing air passes through the formaldehyde filter screen 100; the filtration effect is expressed in CADR value, which is the volume of formaldehyde purified per unit time and is given in m3/h。
TABLE 1
In another embodiment of the formaldehyde filter screen 100 of the present invention, a plurality of inner air through holes are provided on the wall of the air vent 11, and the inner air through holes communicate with two adjacent air vent 11.
So, through setting up interior air through hole, can realize the air that flows and circulate in air vent 11 of difference to can reduce the windage under the prerequisite that does not reduce or do not reduce formaldehyde filter screen 100's filter effect by a wide margin, increase air supply volume, thereby can further improve formaldehyde filter screen 100's performance.
Optionally, a plurality of internal air through holes are formed in the hole wall of any one of the air holes 11, so that the wind resistance can be greatly reduced, and the air supply quantity is increased.
Optionally, the cross sectional shape of the vent hole 11 is polygonal, the hole wall of the vent hole 11 includes a plurality of hole side walls connected to each other, and the inner air passing through holes on two adjacent or opposite hole side walls are arranged in a staggered manner, so as to ensure that the formaldehyde filter screen 100 has sufficient wind resistance and ensure the filtering and purifying effects.
In this embodiment, further, the vent hole 11 at the outermost periphery/circle of the substrate 10 has an outer air through hole (not shown) communicating with the peripheral surface of the substrate 10, and the outer air through hole can communicate the vent hole 11 laterally with the external air environment. So, when formaldehyde filter screen 100 uses, the one end of accessible shutoff air vent 11 (set up the closing plate if the accessible at a face of base plate 10, perhaps locate a face of base plate 10 in order to realize the one end of shutoff air vent 11 in a sealed intracavity), so, interior air through-hole and outer overdue through-hole can form side direction ventilation channel, in order to realize the face air inlet of base plate 10, global air-out (just air inlet, side air-out), or global air inlet, the face air-out (just side air inlet, just air-out), thereby can further increase the time that the air that flows in air vent 11, in order to improve formaldehyde filter screen 100's filter effect.
In another embodiment of the formaldehyde filter screen 100 according to the present invention, as shown in fig. 5, the vent hole 11 includes a tapered section, and the cross-sectional area of the tapered section increases or decreases in the thickness direction of the substrate 10. Thus, the area of the hole wall of the vent hole 11 can be increased, which is beneficial to effectively increasing the filtering area of the formaldehyde filter screen 100, thereby effectively improving the filtering effect of the formaldehyde filter screen 100 and improving the purification efficiency.
In this embodiment, as shown in fig. 5, the cross-sectional area of the vent hole 11 increases or decreases gradually in the depth direction of the vent hole 11, that is, the whole vent hole 11 is a tapered section, that is, the vent hole 11 is provided with a reduced opening or a flared opening in the depth direction of the vent hole 11, so that the hole wall area of the vent hole 11 can be further increased, the filtering effect of the formaldehyde filter screen 100 can be effectively improved, and the purification efficiency can be improved.
In this embodiment, further, as shown in fig. 5, the vent hole 11 has a larger opening end and a smaller opening end, the opening area of the larger opening end and the opening area of the smaller opening end have a reduction ratio, and the reduction ratio is greater than 1 and less than or equal to 10. Wherein the reduction ratio is a ratio of an opening area of the larger opening end to an opening area of the smaller opening end.
It is understood that the larger the reduction ratio, the larger the hole wall area of the vent hole 11, and the larger the wind resistance. That is, if the reduction ratio is too small, the effect of increasing the hole wall area of the vent hole 11 is not significant, and the filtering effect of the formaldehyde filter screen 100 is not significant; if the reduction ratio is too large, the air resistance of the formaldehyde filter screen 100 is too large, so that the air quantity loss is too large, the noise is too large, and the air supply of the air treatment device 100 is not facilitated. Therefore, the reduction ratio is optionally greater than 1 and less than or equal to 10, so as to ensure the filtering effect of the formaldehyde filter screen 100; and the too large wind resistance of the formaldehyde filter screen 100 can be avoided so as to ensure the air supply quantity.
More specifically, the reduction ratio is greater than or equal to 1.5 and less than or equal to 8.
In this embodiment, further, as shown in fig. 5, the cross-sectional area of the vent hole 11 is linearly increased or decreased in the depth direction of the vent hole 11, that is, the longitudinal section of the vent hole 11 is two oblique lines; the longitudinal section of the vent hole 11 refers to a section parallel to the depth direction of the vent hole 11, such as a section passing through the center line of the vent hole 11. Therefore, the manufacturing difficulty of the formaldehyde filter screen 100 can be reduced, and the manufacturing efficiency of the formaldehyde filter screen 100 is improved. Of course, the cross-sectional area of the vent hole 11 may be decreased or increased in other manners, such as two arcs for the longitudinal section of the vent hole 11, to further increase the hole wall area of the vent hole 11.
In this embodiment, it is understood that, as shown in fig. 5, for reasons of cost saving and the like, the wall thickness of the vent hole 11 is generally uniform, such that when the cross-sectional area of one vent hole 11 decreases from one plate surface to the other plate surface of the substrate 10, the cross-sectional area of another vent hole 11 adjacent thereto decreases in the opposite direction (i.e., increases in the same direction), in other words, when one vent hole 11 is arranged in a reduced manner from one end to the other end, another vent hole 11 adjacent thereto is arranged in a reduced manner in the opposite direction (i.e., in a flared manner). That is, the change trends of the two adjacent vent holes 11 are opposite. Thus, the area of the wall surface of the vent hole 11 can be further increased, and the purification efficiency can be improved; and also saves materials.
It should be noted that the technical solutions of the above embodiments of the formaldehyde filter screen 100 of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the protection scope of the present invention. For example, when the cross-sectional area of the vent hole 11 increases or decreases in the depth direction of the vent hole 11, the cross-section of the vent hole 11 at any position should satisfy: the depth cut ratio is greater than or equal to 0.06 and less than or equal to 2.5.
Further, the manufacturing material of the substrate 10 includes a paper material. In this embodiment, the manufacturing material of the substrate 10 may be a paper material with a rough surface, so as to increase the adhesion area and adhesion strength of the catalyst layer, improve the purification capability of the formaldehyde filter 100, and effectively reduce the production cost of the formaldehyde filter 100.
The invention also provides an air treatment device. As shown in fig. 1, the air treatment device includes a housing 200 and a formaldehyde filter screen 100, the housing 200 has an air inlet, an air outlet 220 and an air treatment duct communicating the air inlet and the air outlet 220, the formaldehyde filter screen 100 is disposed at the air inlet; or, the formaldehyde filter screen 100 is arranged in the air treatment air duct; or, the formaldehyde filter screen 100 is disposed at the air outlet 220.
Specifically, the specific structure of the formaldehyde filter screen 100 refers to the above embodiments, and since the air treatment device of the present invention adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
Specifically, the air treatment device 100 is a device that can adjust the temperature, humidity, cleanliness, and the like of air, and includes, but is not limited to, any of a fan, an air conditioner, an indoor air conditioner, an all-in-one air conditioner, an air purifier, an air humidifier, and the like. The indoor unit of the air conditioner comprises but is not limited to a floor type indoor unit of the air conditioner, a vertical hanging unit and a wall-mounted indoor unit of the air conditioner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The formaldehyde filter screen is characterized by comprising a substrate, wherein the substrate is provided with a plurality of vent holes extending along the thickness direction of the substrate, the cross section areas of the vent holes and the hole depths of the vent holes have a depth-cut ratio, and the depth-cut ratio is greater than or equal to 0.06mm/mm2And is less than or equal to 2.5mm/mm2。
2. The formaldehyde filter screen of claim 1, wherein the depth cut ratio is greater than or equal to 0.1mm/mm2And is less than or equal to 1mm/mm2。
3. The formaldehyde filter screen of claim 1, wherein the cross-sectional shape of the vent holes is triangular.
4. The formaldehyde filter screen of claim 1, wherein the cross-sectional shape of the vent holes is circular, and the depth cut ratio is greater than or equal to 0.06mm/mm2And is less than or equal to 1.8mm/mm2。
5. The formaldehyde filter screen of claim 1, wherein the vent holes have a hole depth of greater than or equal to 3mm and less than or equal to 50 mm; and/or
The mesh number of the vent holes is greater than or equal to 30 and less than or equal to 150; and/or
The depth direction of the vent hole is inclined to the thickness direction of the substrate.
6. The formaldehyde filter screen according to any one of claims 1 to 5, further comprising a catalytic layer disposed on a surface of a wall of the vent hole.
7. The formaldehyde filter screen of claim 6, wherein the substrate is made of a material comprising a paper material; and/or the presence of a gas in the gas,
the preparation material of the catalytic layer comprises at least one of manganese dioxide and titanium dioxide.
8. The formaldehyde filter screen as claimed in any one of claims 1 to 5, wherein the wall of the vent hole is provided with a plurality of inner air through holes, and the inner air through holes communicate with two adjacent vent holes.
9. An air treatment device, characterized by comprising a shell and the formaldehyde filter screen as claimed in any one of claims 1 to 8, wherein the shell is provided with an air inlet, an air outlet and an air treatment air duct communicated between the air inlet and the air outlet, and the formaldehyde filter screen is arranged at the air inlet; or the formaldehyde filter screen is arranged in the air treatment air duct; or the formaldehyde filter screen is arranged at the air outlet.
10. The air treatment device of claim 9, wherein the air treatment device is any one of a fan, an air machine, an indoor unit of an air conditioner, an all-in-one air conditioner, an air purifier, and an air humidifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910850389.1A CN112556067A (en) | 2019-09-09 | 2019-09-09 | Formaldehyde filter screen and air treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910850389.1A CN112556067A (en) | 2019-09-09 | 2019-09-09 | Formaldehyde filter screen and air treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112556067A true CN112556067A (en) | 2021-03-26 |
Family
ID=75028770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910850389.1A Pending CN112556067A (en) | 2019-09-09 | 2019-09-09 | Formaldehyde filter screen and air treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112556067A (en) |
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2019
- 2019-09-09 CN CN201910850389.1A patent/CN112556067A/en active Pending
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