CN210602055U

CN210602055U - Formaldehyde filter screen and air treatment device

Info

Publication number: CN210602055U
Application number: CN201921526442.4U
Authority: CN
Inventors: 陈国坚; 陈新厂
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-05-22
Anticipated expiration: 2029-09-09

Abstract

The utility model discloses a formaldehyde filter screen and air treatment device. The formaldehyde filter screen comprises a substrate, the substrate is provided with a plurality of vent holes extending in the thickness direction of the substrate, the vent holes form a plurality of ventilation areas, and the area of the wall of each vent hole in any two adjacent ventilation areas is different. Therefore, two adjacent ventilating areas have different formaldehyde removing effects, and the ventilating areas can better adapt to actual requirements.

Description

Formaldehyde filter screen and air treatment device

Technical Field

The utility model relates to an air purification technical field, in particular to formaldehyde filter screen and air treatment device.

Background

In the related art, the formaldehyde filter screen can be used for removing formaldehyde, but the formaldehyde removing effect at different positions of the formaldehyde filter screen is basically the same, so that the formaldehyde filter screen cannot well adapt to actual requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a formaldehyde filter screen aims at solving the correlation technique, the different position departments of formaldehyde filter screen remove the technical problem that the formaldehyde effect is the same basically.

In order to achieve the above object, the utility model provides a formaldehyde filter screen, formaldehyde filter screen includes the base plate, the base plate has the edge a plurality of air vents that the thickness direction of base plate extends, and is a plurality of the air vent forms a plurality of ventilation areas, arbitrary adjacent two in the ventilation area the distribution of air vent is different.

Optionally, the cross-sectional shapes of the vent holes in any two adjacent vent areas are different; and/or the presence of a gas in the gas,

the mesh number of the vent holes in any two adjacent vent areas is different; and/or the presence of a gas in the gas,

the depth extending directions of the vent holes in any two adjacent vent areas are different; and/or the presence of a gas in the gas,

the vent holes in any two adjacent vent areas have different hole depths; and/or the presence of a gas in the gas,

the cross-sectional areas of the vent holes in any two adjacent vent areas have different variation trends in the thickness direction of the substrate.

Optionally, the distribution of vent holes in any two of the vented zones is different.

Optionally, the plurality of ventilation areas are sequentially distributed in the length direction of the formaldehyde filter screen; or,

the plurality of ventilation areas are distributed in sequence in the width direction of the formaldehyde filter screen.

Optionally, the ventilation area includes that first ventilation area, second ventilation area and third ventilation area distribute in proper order in the length direction of formaldehyde filter screen, the air vent cross sectional shape in the first ventilation area, the air vent cross sectional shape in the second ventilation area and the air vent cross sectional shape in the third ventilation area is one of circular, rectangle, triangle-shaped respectively.

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; and/or the presence of a gas in the gas,

and a plurality of inner air passing through holes are formed in the hole walls of the air holes and are communicated with two adjacent air holes.

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.

The utility model 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 duct arranged 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, the substrate is provided with a plurality of vent holes extending along the thickness direction of the substrate, the vent holes form a plurality of ventilation areas, and the vent holes are distributed differently in any two adjacent ventilation areas.

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.

Optionally, the formaldehyde filter screen is slidably arranged at the air inlet, so that the plurality of ventilation areas can be alternatively arranged corresponding to the air inlet; or,

the formaldehyde filter screen can be slidably arranged at the air outlet, so that the plurality of ventilation areas can be alternatively arranged corresponding to the air outlet.

The utility model discloses the formaldehyde filter screen is through forming a plurality of ventilation districts on the formaldehyde filter screen to make arbitrary adjacent two the distribution of air vent in the ventilation district is different, can make adjacent two the formaldehyde effect that removes in ventilation district is different, so adaptation actual demand that can be better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 view 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 an enlarged view of a portion of FIG. 2 at B;

FIG. 6 is a schematic cross-sectional view of the formaldehyde filter along line II-II in FIG. 2;

FIG. 7 is a schematic structural view of another embodiment of the ventilating area of the formaldehyde filter screen of the present invention;

fig. 8 is a schematic structural diagram of a fifth embodiment of the ventilation area of the formaldehyde filter screen of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Formaldehyde filter screen	200	Shell body
10	Substrate	220	Air outlet
				11	Vent hole	1	First ventilation zone
111	Larger open end	2	Second ventilating area
				112	Smaller open end	3	Third ventilation zone
1000	Air treatment device

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., 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 technical features indicated. 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 utility model provides a formaldehyde filter screen and 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 1000 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 a formaldehyde filter 100 is generally disposed at the air inlet for removing formaldehyde from 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 the 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 1111 are distributed on the surface of the substrate 10, and the vent holes 1111 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 the example of the present invention, the second mode is adopted to improve the filtering effect of the formaldehyde removing filter screen 100, that is, the formaldehyde filter screen 100 further includes a catalyst layer, and the catalyst 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.

In an embodiment of the present invention, as shown in fig. 2, 3 and 5, a plurality of the vent holes 11 form a plurality of ventilation areas, and the distribution of the vent holes in any two adjacent ventilation areas is different.

It can be understood that by adjusting the distribution of the vent holes, the wind resistance, the filtering effect and the like of different ventilation areas can be different.

That is to say, the utility model discloses formaldehyde filter screen 100 is through forming a plurality of ventilation districts on formaldehyde filter screen 100 to make arbitrary adjacent two the distribution of air vent in the ventilation district is different, can make adjacent two the windage in ventilation district is different and remove the formaldehyde effect different (filter effect is different promptly), so adaptation actual demand that can be better.

Specifically, the wind resistance of part of ventilation areas can be smaller, and the formaldehyde removing effect is slightly poor, so that the air supply quantity is ensured; meanwhile, the wind resistance of part of ventilation areas is larger, and the formaldehyde removing effect is slightly better, so that the filtering/purifying effect is improved; and so on.

It should be noted that, when the formaldehyde filter 100 is applied to the air treatment device 1000, part of the formaldehyde filter 100 may be disposed in the air treatment duct, that is, one or part of the ventilation area is disposed in the air treatment duct, or at the air inlet, or at the air outlet 220; alternatively, the formaldehyde filter 100 may be disposed entirely in the air treatment duct.

In the example of the present invention, one of the ventilation areas is alternatively set to correspond to the air inlet or the air outlet 220, so as to select different ventilation areas when different actual demands (such as increasing the amount of air supply or increasing the filtering effect) are required.

Specifically, the formaldehyde filter screen 100 can be slidably or detachably arranged at the air inlet, so that the plurality of ventilation areas can be alternatively arranged corresponding to the air inlet; or, the formaldehyde filter screen 100 may be slidably or detachably disposed at the air outlet 220, so that the plurality of ventilation areas may be alternatively disposed corresponding to the air outlet 220. When adjustment is needed, another ventilation area can be quickly replaced corresponding to the air outlet (the air outlet 220 or the air inlet) by sliding or dismounting.

In this embodiment, the formaldehyde filter screen 100 is slidably disposed at the air inlet; or, the formaldehyde filter screen 100 can be slidably disposed at the air outlet 220.

In a specific embodiment, in order to adjust different ventilation areas to correspond to air ports (air outlets 220 or air inlets), a plurality of ventilation areas may be sequentially distributed in the length direction of the formaldehyde filter screen 100; alternatively, a plurality of the ventilation areas are sequentially distributed in the width direction of the formaldehyde filter screen 100. In this way, the formaldehyde filter 100 only needs to be slid in the longitudinal direction or the width direction of the formaldehyde filter 100 during adjustment.

Further, the distribution of the vent holes in any two of the ventilation areas is different, so that the practicability of the formaldehyde filter screen 100 is improved.

In a specific embodiment, to realize different distribution of the vent holes in different ventilation areas, at least one of the following manners can be adopted:

1) the cross-sectional shapes of the vent holes in the two different ventilating areas are different.

2) The mesh number of the vent holes in the two different vent areas is different.

3) The depth extending directions of the vent holes in the two different ventilating areas are different.

4) The vent holes in different two of the vent areas have different hole depths.

5) The cross-sectional areas of the vent holes in the two different vent regions have different trends in the thickness direction of the substrate 10.

It is understood that the filtration performance, wind resistance, and the like of the formaldehyde filtration are related to the hole wall area of the vent holes 11, the cross-sectional shape of the vent holes 11, the depth extending direction of the vent holes, the mesh number of the vent holes, and the like, and the hole wall area of the vent holes 11 can be generally expressed by the product of the cross-sectional area of the vent holes 11 and the hole depth of the vent holes 11. The hole depth of the vent hole 11 is the depth/length of the vent hole 11, and the cross section of the vent hole 11 is a section perpendicular to the depth direction of the vent hole 11.

In this embodiment, as shown in fig. 2, the ventilation area includes a first ventilation area 1, a second ventilation area 2, and a third ventilation area 3 that are sequentially distributed in a length direction of the formaldehyde filter screen 100, and a cross-sectional shape of a vent hole in the first ventilation area 1, a cross-sectional shape of a vent hole in the second ventilation area 2, and a cross-sectional shape of a vent hole in the third ventilation area 3 are respectively one of a circle, a rectangle, and a triangle.

It is understood that the filtering performance and the wind resistance of the formaldehyde filter are related not only to the area of the wall of the vent hole 11 but also to the cross-sectional shape of the vent hole 11, wherein the cross-sectional shape of the vent hole 11 may influence the time for which air flows in the vent hole 11. Specifically, the cross-sectional shape of the vent hole 11 is generally a polygon (such as a triangle, a quadrangle, a pentagon, a hexagon, an octagon, etc.) or a circle (it can be understood that a circle has infinite sides, i.e., 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 the sides of the cross-sectional polygon are, the larger the included angle between two adjacent sides becomes (or the sum of the internal angles of the cross-sectional polygon is, the larger the sum is), so that the less or less obvious the phenomenon that the flowing air generates eddy and turbulent flow in the vent hole 11 is, and the faster the flow speed of the air in the vent hole 11 can be achieved; 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, the cross section shapes of the vent holes in the first ventilation area 1, the second ventilation area 2 and the third ventilation area 3 are respectively set to be one of a circle, a rectangle and a triangle, so that different ventilation areas can have different wind resistances and different formaldehyde removal effects.

Optionally, as shown in fig. 2, the first ventilation area 1, the second ventilation area 2, and the third ventilation area 3 are sequentially distributed from left to right, the cross-sectional shape of the vent hole in the first ventilation area 1 is triangular, the cross-sectional shape of the vent hole in the second ventilation area 2 is rectangular, and the cross-sectional shape of the vent hole in the third ventilation area 3 is circular.

Optionally, the wind resistance of the first ventilation area 1 may be greater than the wind resistance of the second ventilation area 2, the wind resistance of the second ventilation area 2 may be greater than the wind resistance of the third ventilation area 3, the filtering effect of the first ventilation area 1 is better than the filtering effect of the second ventilation area 2, and the wind resistance of the second ventilation area 2 is better than the filtering effect of the third ventilation area 3. In this way, it may be convenient to select different ventilation zones in sequence.

The vent holes in any one of the vented zones may be arranged as follows.

In an embodiment of the ventilation zone of the present invention, the area of the cross section of the vent hole 11 has a depth cut ratio with the hole depth of the vent hole 11, and the unit of the area of the cross section is different from the unit of the hole depth, so 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 thanOr equal to 2.5mm/mm². The cut-depth ratio is a ratio of an area of a cross section of the vent hole 11 to a 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 in the vent area with the same area, that is, the larger the mesh number of the vent holes 11 is, the larger the wind resistance of the vent area is, and the better the filtering effect is; conversely, the larger the area of the cross section of the vent hole 11, the fewer vent holes 11 are arranged in the same area of the ventilation zone, that is, the smaller the mesh number of the vent holes 11, the smaller the wind resistance of the ventilation zone, 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 is, the smaller the wind resistance of the ventilation area 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 ventilation area 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 ventilation area is, the better the filtering effect is; however, if the depth ratio is too small, the wind resistance in the ventilation area 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 1000 to blow air.

The larger the cut-off ratio (which can be achieved by increasing the area of the cross section of the vent hole 11 or decreasing the hole depth of the vent hole 11), the smaller the wind resistance of the ventilation area, the poorer the filtering effect; however, if the depth ratio is too large, the filtering effect of the ventilation zone 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 ventilation area; and the over-large wind resistance of the ventilation area can be avoided to ensure the air supply quantity, so that the performance stability of the ventilation area is improved.

That is, for a ventilation zone, 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 ventilation area can be ensured; and the over-large wind resistance of the ventilation area can be avoided to ensure the air supply quantity, so that the performance stability of the ventilation area can be improved.

It will be appreciated that, in order to further improve the stability of the performance of the ventilation zone, said 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 ensuring the filtering effect of the ventilation area; and the too large wind resistance of the ventilation area can be further avoided, so that the air supply quantity is further ensured.

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.

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, the utility model discloses formaldehyde filter screen 100 sets up to triangle-shaped through the cross sectional shape that makes air vent 11, can make connection relatively stable between each lateral wall of air vent 11, firm, indestructible to can strengthen formaldehyde filter screen 100's overall structure intensity, reduce the risk that formaldehyde filter screen 100 damaged, with the life who improves 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 1.8mm/mm². Preferably, the depth cut ratio is greater than or equal toAt 0.2mm/mm²And is less than or equal to 0.6mm/mm²。

In another embodiment of the ventilation zone of the present invention, as shown in fig. 2 and 5, the cross-sectional shape of the vent hole 11 is a polygon, and the number of sides of the cross-section of the vent hole 11 is greater than or equal to 4.

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, an octagon, 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 is higher; therefore, for the vent holes 11 having the same cross-sectional area and the same hole depth, the larger the number of sides of the cross-sectional polygon, the shorter the time for the flowing air to flow in the vent holes 11, and the shorter the contact time between the flowing air and the catalytic material, the poorer the filtering effect of the formaldehyde filter screen 100 (i.e., the formaldehyde filter screen 100 in the ventilation zone, the same below), and the smaller the wind resistance. 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.

Therefore, for a ventilation area, the cross section of the vent holes 11 is polygonal, and the number of sides of the cross section of the vent holes 11 is greater than or equal to 4, so that the time for flowing air to flow in the vent holes 11 can be shortened, the wind resistance of the ventilation area can be reduced, and the formaldehyde filter screen 100 with small wind resistance can be manufactured conveniently.

Specifically, the cross-sectional shape of the vent hole 11 is a regular polygon (which allows manufacturing errors) or a circle (which allows manufacturing errors). Therefore, the manufacturing difficulty of the formaldehyde filter screen 100 can be reduced conveniently.

In this embodiment, specifically, the cross-sectional shape of the vent hole 11 may be a quadrangle, a pentagon, a hexagon, an octagon, a circle, or the like, which will be described below.

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。

Specifically, the cross-sectional shape of the vent hole 11 may be rectangular.

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。

Specifically, the cross-sectional shape of the vent hole 11 may be a regular pentagon.

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 greater than or equal to 0.1mm/mm²And is less than or equal to 1.2mm/mm². Preferably, the depth cut ratio is greater than or equal to 0.2mm/mm²And is less than or equal to 0.6mm/mm²。

Specifically, the cross-sectional shape of the vent hole 11 may be selected to be a regular hexagon.

When the cross-sectional shape of the vent hole 11 is octagonal, the depth cut ratio may be made greater than or equal to 0.06mm/mm²And is less than or equal to 1.9mm/mm²(ii) a Furthermore, the utility modelIn particular, the depth cut ratio can 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。

Specifically, the cross-sectional shape of the vent hole 11 may be selected to be a regular octagon.

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。

In order to facilitate understanding the utility model discloses, the utility model provides a part experimental data, as follows.

In the experiment provided by the utility model, 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

As is apparent from table 1, when the depth ratio is increased within a certain range, the air volume loss of the flowing air passing through the formaldehyde filter 100 is reduced, and the purifying effect is also deteriorated.

In another embodiment of the ventilation zone of the present invention, a plurality of inner air passing through holes are disposed on the hole wall of the air vent 11, and the inner air passing 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 the filter effect of formaldehyde filter screen 100 (the formaldehyde filter screen 100 of this ventilating zone promptly, the same down), 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 a further embodiment of the ventilation zone of the present invention, as shown in fig. 7, the ventilation holes 11 comprise a reduction section, and the cross-sectional area of the reduction section increases or decreases in the thickness direction of the base plate 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 filtering net 100 (namely, the formaldehyde filtering net 100 in the ventilation area, the same below), thereby effectively improving the filtering effect of the formaldehyde filtering net 100 and improving the purification efficiency.

In this embodiment, as shown in fig. 7, 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. 7, the vent hole 11 has a larger open end 111 and a smaller open end 112, and an opening area of the larger open end 111 and an opening area of the smaller open end 112 have a reduction ratio, which is greater than 1 and less than or equal to 10. The reduction ratio is a ratio of an opening area of the larger opening end 111 to an opening area of the smaller opening end 112.

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, and the air volume loss and noise are too large, which is not favorable for the air supply of the air processing device 1000. 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. 7, 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. 7, 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.

To facilitate an understanding of the present invention, some experimental data are provided in this example, as follows.

In the experiment provided in this embodiment, the influence of the change in the tapering ratio on the filtering effect of the formaldehyde filter screen 100 and the wind resistance when the cross-sectional shapes of the vent holes 11 are respectively triangular, rectangular, and circular is given; 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 2

As is apparent from table 2, when the tapering ratio is increased within a certain range, the air volume loss of the flowing air after passing through the formaldehyde filter 100 becomes large, but the purifying effect becomes good.

In the fifth embodiment of the ventilation zone of the present invention, as shown in fig. 8, the depth direction of the vent hole 11 is inclined to the thickness direction of the substrate 10 to increase the hole wall area of the vent hole 11, which can increase the filtering area, so as to improve the filtering efficiency (formaldehyde removal efficiency), and improve the purification effect. Of course, as shown in fig. 4 and 6, in other embodiments, 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 (i.e., the formaldehyde filter 100 in the ventilation area, the same applies below), where the depth of the vent hole 11 is the thickness of the substrate 10.

In the sixth embodiment of the ventilation zone of the present invention, the hole walls of the ventilation holes 11 can be arranged in a wavy manner, so as to not only increase the adhesion area of the catalyst layer, but also increase the adhesion strength; but also can be beneficial to increasing the filtering area so as to enhance the purifying effect.

It should be noted that, the technical solutions between the above embodiments of the ventilation area of the present invention can be combined with each other to realize different distribution of the vent holes in different ventilation areas, but it must be based on that the ordinary skilled person in the art can realize that when the technical solutions are combined and contradictory or can not be realized, it should be considered that the combination of the technical solutions does not exist, and is 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.

In an example of the ventilation zone of the present invention, 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.

In an example of the ventilation zone of the present invention, 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.

In an example of the present invention, the material of which the substrate 10 is made includes a paper material. Specifically, the manufacturing material of the substrate 10 may be a paper material with a rough surface, so as to increase the attachment area and the attachment strength of the catalyst layer, improve the purification capability of the formaldehyde filter screen 100, and in addition, effectively reduce the production cost of the formaldehyde filter screen 100.

The utility model discloses still provide an air treatment facilities 1000. As shown in fig. 1, the air treatment device 1000 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, this formaldehyde filter screen 100's concrete structure refers to above-mentioned embodiment, because the utility model discloses air treatment device 1000 has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

Specifically, the air treatment device 1000 is a device capable of adjusting 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.

In this embodiment, the formaldehyde filter screen 100 is slidably disposed at the air inlet; or, the formaldehyde filter screen 100 can be slidably disposed at the air outlet 220. In this way, the formaldehyde filter 100 only needs to be slid in the longitudinal direction or the width direction of the formaldehyde filter 100 during adjustment.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a formaldehyde filter screen, its characterized in that, formaldehyde filter screen includes the base plate, the base plate has along a plurality of air vents that the thickness direction of base plate extends, and is a plurality of the air vent forms a plurality of ventilation areas, arbitrary adjacent two in the ventilation area the distribution of air vent is different.

2. The formaldehyde filter screen of claim 1, wherein the cross-sectional shapes of the vent holes in any two adjacent vent regions are different; and/or the presence of a gas in the gas,

3. The formaldehyde filter screen of claim 1, wherein the distribution of the vent holes in any two of the vent regions is different.

4. The formaldehyde filter screen of claim 1, wherein a plurality of the ventilation zones are sequentially distributed along a length of the formaldehyde filter screen; or,

5. The formaldehyde filter screen as claimed in claim 4, wherein the ventilation zone comprises a first ventilation zone, a second ventilation zone and a third ventilation zone which are sequentially distributed in the length direction of the formaldehyde filter screen, and the cross-sectional shapes of the vent holes in the first ventilation zone, the second ventilation zone and the third ventilation zone are respectively one of circular, rectangular and triangular.

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; and/or the presence of a gas in the gas,

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,

8. An air treatment device, characterized by comprising a shell and the formaldehyde filter screen as claimed in any one of claims 1 to 7, wherein the shell is provided with an air inlet, an air outlet and an air treatment air duct arranged 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.

9. The air treatment device of claim 8, 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.

10. The air treatment device of claim 8, wherein the formaldehyde filter screen is slidably disposed at the air inlet, such that a plurality of the ventilation zones are alternatively disposed corresponding to the air inlet; or,