CN219663207U - Filter element and air filtering device - Google Patents

Abstract

A filter element and an air filter device. The filter cartridge includes: a first filter layer; the second filter layer is positioned at one side of the first filter layer; functional substances are attached to the second filter layer; binding; the binding edge is used for fixing at least one of the first filter layer and the second filter layer; the first filter layer and the second filter layer are fold filter layers, and the whole of the second filter layer covers and is attached to part of the first filter layer. By adopting the scheme, the filter element not only can reduce wind resistance, but also can slow down the volatilization speed of functional substances.

Description

Filter element and air filtering device

Technical Field

The utility model relates to the technical field of air filtration, in particular to a filter element and an air filtration device.

Background

Air filters are commonly used in air conditioners, air purifiers, etc. for filtering air entering a room or a vehicle from the outside, thereby improving the air quality in the room or the vehicle.

In order to meet the needs of various users, functional material layers are often added in the existing filter element, and functional substances such as vitamin C, aromatherapy and the like can be attached to the functional material layers, so that the air quality after filtration is improved, but at the same time, the added functional material layers also increase the wind resistance of the filter element.

Disclosure of Invention

The utility model aims to solve the problems that: the filter element with the functional material layer reduces wind resistance and slows down the volatilization speed of functional substances.

To solve the above problems, an embodiment of the present utility model provides a filter cartridge for filtering gas, including:

a first filter layer;

the second filter layer is positioned at one side of the first filter layer; functional substances are attached to the second filter layer;

binding; the binding edge is used for fixing at least one of the first filter layer and the second filter layer;

the first filter layer and the second filter layer are fold filter layers, and the whole of the second filter layer covers and is attached to part of the first filter layer.

Optionally, the second filter layer has an area less than or equal to 62% of the area of the first filter layer.

Optionally, the first filter layer and the second filter layer are each composed of a continuous plurality of pleated structures, and the pleated structures of the second filter layer and the first filter layer in the covering and fitting region are the same.

Optionally, the number of pleat structures on the first filter layer is greater than the number of pleat structures on the second filter layer.

Optionally, the number of second filter layers in the filter element is one.

Optionally, the second filter layer is located on the air outlet side of the first filter layer.

Optionally, the number of the second filter layers in the filter element is more than two.

Optionally, the functional substances attached to two or more of the second filter layers are different.

Optionally, at least one of the second filter layers is located on the air outlet side of the first filter layer.

Optionally, the second filter layer is flush with at least one edge of the first filter layer and is secured by the binding.

Optionally, the binding edge includes a first binding edge and a second binding edge which are oppositely arranged; the first binding edge covers the first edge of the first filter layer and the third edge of the second filter layer, and the second binding edge covers the second edge of the first filter layer and the fourth edge of the second filter layer.

The embodiment of the utility model also provides an air filter device, which comprises: a filter cartridge of any one of the above.

Compared with the prior art, the technical scheme of the embodiment of the utility model has the following advantages:

by applying the scheme of the utility model, the filter element comprises the first filter layer and the second filter layer, wherein the first filter layer and the second filter layer are both fold filter layers, the whole second filter layer covers and is attached to the part of the first filter layer, and as the second filter layer is folded and attached to the first filter layer and covers the first filter layer completely in a plane relative to the second filter layer, the wind resistance of the filter element can be reduced, so that the ventilation quantity can be improved, the user experience is improved.

Drawings

FIG. 1 is a top view of a prior art cartridge;

FIG. 2 is a cross-sectional view of the cartridge of FIG. 1 taken along the direction AA';

FIG. 3 is a partially enlarged schematic illustration of portion B of FIG. 2;

FIG. 4 is a top view of another prior art cartridge;

FIG. 5 is a cross-sectional view of the cartridge of FIG. 4 taken along DD';

FIG. 6 is an enlarged schematic view of a portion C of FIG. 5;

FIG. 7 is a top view of a cartridge of the present utility model;

FIG. 8 is a cross-sectional view of the cartridge of FIG. 7 along FF';

FIG. 9 is an enlarged schematic view of portion E of FIG. 8;

FIG. 10 is a side view of the cartridge of FIG. 7;

FIG. 11 is a schematic view of the exploded construction of the cartridge of FIG. 7;

FIG. 12 is a schematic view of a pleated structure of a different cross-sectional shape in accordance with an embodiment of the present utility model;

FIG. 13 is a schematic view of a pleat construction of various pleat distances in an embodiment of the utility model;

FIG. 14 is a schematic view of a pleat construction of different pleat heights in an embodiment of the utility model;

FIG. 15 is a graphical representation of the change in windage of various cartridges as air flow increases.

Detailed Description

Existing filter elements typically include a conventional filter layer and a functional filter layer. The conventional filter layer is a filter layer made of common materials and can filter air. Functional substances are attached to the functional filter layer, and the functional substances attached to the functional filter layer can volatilize due to the flowing of air, such as aromatherapy, vitamin C and the like, and the vitamin C or the aromatherapy substances are carried in the air flow passing through the filter element, so that the requirements of individual users are met.

However, the wind resistance of the filter element in the prior art is large, and the volatilization speed of the functional substances is high. The following is a detailed description of two common filter cartridge configurations:

fig. 1 is a top view of a prior art cartridge 10, fig. 2 is a cross-sectional view of the cartridge of fig. 1 taken along direction AA', and fig. 3 is an enlarged partial schematic view of section B of fig. 2. Referring to fig. 1-3, the cartridge 10 may include a conventional filter layer 11 and a functional filter layer 12. The functional filter layer 12 is a planar filter material structure and is located on one side of the conventional filter layer 11.

With the filter element, the functional filter layer 12 is of a planar filter material structure, so that the overall wind resistance of the filter element is increased.

Fig. 4 is a top view of another prior art cartridge 40, fig. 5 is a cross-sectional view of the cartridge 40 of fig. 4 taken along DD', and fig. 6 is an enlarged partial schematic view of portion C of fig. 4. Referring to fig. 4 to 6, the filter cartridge 40 may include a conventional filter layer 41 and a functional filter layer 42. The functional filter layer 42 is a pleated filter layer, and the functional filter layer 42 completely covers and fits one side of the conventional filter layer 41.

By adopting the filter element, although the wind resistance is reduced compared with the filter element shown in the figures 1 to 3, the wind resistance is still larger than that of the filter element without the functional filter layer, and the customer experience is still reduced.

In addition, the filter cartridge shown in fig. 1 to 3, the functional filter layer 12 completely covers one side of the conventional filter layer 11, and at this time, the air velocity through each region of the filter cartridge is uniform, and the volatilization velocity of the functional substance is determined by the air velocity (average air velocity) through the filter cartridge.

The cartridge shown in fig. 4 to 6, the functional filter layer 42 completely covers and fits on one side of the conventional filter layer 41, and at this time, the air velocity through each region of the cartridge is uniform, and the volatilization velocity of the functional substance is determined by the air velocity (average air velocity) through the cartridge.

The filter cartridge shown in fig. 4 to 6 increases the average wind speed through the filter cartridge due to the decrease in wind resistance, and thus increases the volatilization speed of the functional substance, relative to the filter cartridge shown in fig. 1 to 3.

However, it is desirable for the user that the air velocity through the cartridge be high and that the volatilization rate of the functional material be slow.

In order to solve the problem, the utility model provides a filter element, which comprises a first filter layer and a second filter layer, wherein the whole of the second filter layer covers and is attached to part of the first filter layer. Compared with the condition that the first filter layer is completely covered, the wind resistance of the filter element can be reduced, so that the ventilation quantity can be improved, and the user experience is improved.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

The embodiment of the utility model provides a filter element. Fig. 7 is a top view of the cartridge 70. Fig. 8 is a cross-sectional view of the cartridge 70 of fig. 7 along FF'. Fig. 9 is an enlarged schematic view of the portion E in fig. 8. Fig. 10 is a side view of the cartridge 70 of fig. 7. Fig. 11 is a schematic view of an exploded construction of the cartridge 70 of fig. 7. Referring to fig. 7-11, the cartridge 70 is used to filter gases including, but not limited to, air. Specifically, the filter cartridge 70 may include:

a first filter layer 71;

a second filter layer 72 located on one side of the first filter layer 71; the second filter layer 72 has a functional substance attached thereto;

and binding edges (shown as 73 and 74); the binding edge is used for fixing at least one of the first filter layer and the second filter layer;

the first filter layer 71 and the second filter layer 72 are pleated filter layers, and the whole of the second filter layer 72 covers and fits with a part of the first filter layer 71.

In a specific implementation, the material of the first filter layer 71 and the second filter layer 72 may be a nonwoven fabric, and the thickness of the second filter layer is typically less than 1mm. The thicknesses of the first filter layer 71 and the second filter layer 72 may be the same or different, and may be specifically selected according to the process conditions.

In a specific implementation, the area of the second filter layer 72 is smaller than the area of the first filter layer 71. The area of the second filter layer 72 is related to the average wind resistance of the whole filter element, and specifically, the area of the second filter layer 72 can be set according to the requirement on the average wind resistance of the filter element. The larger the area of the second filter layer 72, the greater the average windage across the filter element. Of course, the area of the second filter layer 72 is also related to the need for the functional substance, including what the functional substance is specifically, the concentration of the functional substance, and the like. Specifically, the area of the second filter layer 72 may be set according to the requirements of functional substances and the average wind resistance of the whole filter element. In one embodiment of the utility model, the area of the second filter layer 72 is less than or equal to 62% of the area of the first filter layer 71. Preferably, the area of the second filter layer 72 is 10% to 50% of the area of the first filter layer 71. More preferably, the area of the second filter layer 72 is 15% to 45% of the area of the first filter layer 71. Most preferably, the area of the second filter layer 72 is 20% to 40% of the area of the first filter layer 71.

In an implementation, the first filter layer 71 and the second filter layer 72 are each composed of a continuous plurality of pleated structures 711. The cross-sectional shape of each pleated structure 711 may be various, for example, the cross-sectional shape of the pleated structure may be "V-shaped" or "U-shaped". The plurality of pleated structures 711 are sequentially aligned and connected in a K direction, i.e., the extending direction of the filter element, to form respective filter layers. Compared with the filter layer with a planar structure, the fold filter layer has a larger air contact area, so that the air filtering efficiency can be improved.

In particular embodiments, the cross-sectional shape of each pleat structure within the same filter layer may be the same or different. For example, referring to fig. 8, the cross-sectional shapes of the pleated structures 81 in the cartridge are all the same and all have a "V-shape". Referring to fig. 12, the cartridge includes not only a pleated structure 1201 having a "V-shaped" cross-section, but also a pleated structure 1202 having a "U-shaped" cross-section.

In a specific implementation, for any pleat structure, there are three attribute features of pleat width, pleat spacing, and pleat height. Taking a pleated structure having a "V" shape in cross section as an example, referring to fig. 7, the pleat width is referred to as the width L of the pleated structure 81. Referring to fig. 8, the so-called pleat spacing, i.e., the distance d between peaks of adjacent pleat 81. The pleat height is the height h of the pleat formation 81.

In practice, the pleat width, pleat spacing, and pleat height of each pleat structure may be set as desired. The pleat width of any pleat structure in the same filter layer may be the same as or different from the pleat widths of other pleat structures in the filter layer. For any pleat in the same filter layer, the pleat spacing may be the same as or different from the pleat spacing of other pleats in the filter layer. For any pleat structure in the same filter layer, the pleat height may be the same as or different from the pleat heights of other pleat structures in the filter layer.

For example, referring to fig. 13, in the same filter layer, all the pleat widths and pleat heights of all the pleat structures are the same, but the pleat spacing of some pleat structures is d1 and the pleat spacing of some pleat structures is d2. Referring to fig. 14, in the same filter layer, all the pleat widths and pleat pitches of the pleat structures are the same, but the pleat heights of the pleat structures are h1, and the pleat pitches of the pleat structures are h2.

In the embodiment of the present utility model, referring to fig. 7 to 11, the whole of the second filter layer 72 covers and conforms to a part of the first filter layer 71, and the second filter layer 72 and the first filter layer 71 have the same pleat structure in the covered and bonded region. Thus, the pleated structure of the second filter layer 72 and the first filter layer 71 covers and fits one by one in the covered and fitted region. The pleated structure means that the two pleated structures which are covered and bonded have the same cross-sectional shape, and the pleat width, pleat pitch, and pleat height are also substantially the same.

In some embodiments, the second filter layer 72 and the first filter layer 71 cover and fit within the region, for process reasons and the like, the two pleated structures that cover and fit may create a fit gap due to the difference in pleat height. According to practical experience, in order to obtain low wind resistance, the fit gap between the first filter layer 71 and the second filter layer 72 should be less than or equal to 0.5mm. When the fit gap is too large, the pleat pitch of the pleat structure can be rearranged to meet the fit gap requirement.

In a specific implementation, referring to fig. 7-11, the second filter layer 72 is disposed against a side of the first filter layer 71. The second filter layer 72 may be disposed on the air inlet side of the first filter layer 71, or may be disposed on the air outlet side of the first filter layer 71, which is not limited herein.

In particular implementations, referring to fig. 7-11, the number of pleat structures 711 on the first filter layer 71 is greater than the number of pleat structures 711 on the second filter layer 72. The number of specific pleat structures 711 on the first filter layer 71 and the second filter layer 72 is not limited, and may be set according to the size of the space in which the filter element 70 may be actually placed.

In an embodiment of the present utility model, referring to fig. 7 to 11, the second filter layer 72 covers a partial area of the first filter layer 71. The partial region may be a middle region of the first filter layer 71, and in other embodiments, the second filter layer 72 may cover other regions of the first filter layer 71, which is not limited herein, as long as it covers a part of the second filter layer 72.

In an embodiment of the utility model, referring to fig. 7-11, the cartridge may include only one second filter layer 72, where the cartridge is capable of providing only one functional substance, e.g., only vitamin C. The single second filter layer 72 may be positioned anywhere that fits over the first filter layer 71.

In one embodiment of the utility model, referring to fig. 7-11, the cartridge may include more than two second filter layers 72, in which case the cartridge may provide two or more functional substances. For example, the cartridge includes two second filter layers 72, one of the second filter layers 72 releasing vitamin C and the other second filter layer 72 releasing fragrance material. Each second filter layer 72 may be respectively fitted over a different partial position of the first filter layer 71.

In implementations, regardless of the number of second filter layers 72, the second filter layers 72 may be flush with at least one edge of the first filter layer 71.

For example, referring to fig. 11, the first filter layer 71 has opposite first and second edges 71a and 71b. The second filter layer 72 has opposite third and fourth edges 72a, 72b. Wherein the third edge 72a covers the first edge 71a and is flush with the third edge 72 a. The fourth edge 72b covers the second edge 71b and is flush with the second edge 71b.

In particular embodiments, the binding edge is used to secure the flush edges of the first filter layer 71 and the second filter layer 72. The binder may fix at least one of the first filter layer 71 and the second filter layer 72.

In implementations, referring to fig. 7-11, when there are two edges of the first filter layer 71 and the second filter layer 72 that are disposed flush, the binding may include a first binding 73 and a second binding 74 that are disposed opposite each other. Referring to fig. 11, the first bank 73 covers the first edge 71a of the first filter layer 71 and the third edge 72a of the second filter layer, and the second bank 74 covers the second edge 71b of the first filter layer and the fourth edge 72b of the second filter layer.

In an implementation, when there is one edge flush arrangement of both the first filter layer 71 and the second filter layer 72, the binding may include only the first binding that secures the flush edges. When the first filter layer 71 and the second filter layer 72 have a plurality of edges arranged in a flush manner, a plurality of binding structures can be arranged to fix the flush edges respectively.

In an embodiment, the fixation of the filter layer by the binding edge may not be limited by whether the second filter layer is flush with the edge of the first filter layer. For example, corresponding binding edges may be disposed around the first filter layer to fix the first filter layer.

In a specific implementation, the first binding edge and the second binding edge may be adhered to edges of the first filtering layer 71 and the second filtering layer 72 by using an adhesive material such as glue, so as to achieve a fixing purpose.

The wind resistance test was performed on a first filter element (not covered with the functional filter layer) composed of a conventional filter layer, a second filter element (shown in fig. 7 to 10) partially covered with the functional filter layer, and a third filter element (shown in fig. 1 to 4) having a planar filter material structure as the functional filter layer 12 at different wind speeds, so that the graph shown in fig. 15 could be obtained. In fig. 15, the horizontal axis represents the air flow rate, and the vertical axis represents the change of the air resistance of the different filter elements with the air flow rate.

As can be seen from fig. 15, the third filter element has a relatively large wind resistance at the same air flow rate, and the wind resistances of the first filter element and the second filter element are relatively close. That is, the wind resistance of the filter element provided by the utility model is close to the wind resistance of the filter element when the functional filter layer is not arranged, so that the average wind speed of the filter element is equivalent to the average wind speed of the filter element when the functional filter layer is not arranged, and is obviously smaller than the average wind speed passing through the third filter element, namely the wind resistance is obviously reduced.

Referring to fig. 11, the overlapping area of the first filter layer 71 and the second filter layer 72 is a second area S2, and the areas on both sides of the second area S2 are a first area S1 and a third area S3, respectively, wherein the first area S1 and the third area S3 only include the first filter layer 71 and do not include the second filter layer 72. In this embodiment, the area of the second region S2 is about 33% of the area of the first filter layer. The filter element is arranged in a test shell of the air filter, the air inlet side of the filter element is opposite to a fan, the fan is started, an anemometer is used on the air outlet side of the filter element, the wind speeds of a first area S1, a second area S2 and a third area S3 are detected, 20S are detected in each area, an average value is obtained, and the test result is that:

the average wind speed of the first region S1 is 65m/S, the average wind speed of the second region S2 is 15m/S, and the average wind speed of the third region S3 is 55m/S.

From this, it can be seen that the region where the second filter layer is superimposed has a wind speed of about 25% of the wind speed of the first region S1 and the third region S3, and the volatilization speed of the functional substance is slow at a low wind speed, so that the release period of the functional substance is prolonged. Therefore, the filter element provided by the embodiment of the utility model has the advantages that the volatilization speed of functional substances is reduced, and the service cycle of the second filter layer is prolonged.

By adopting the filter element, not only the wind resistance can be reduced, but also the volatilization speed of functional substances can be slowed down.

The embodiment of the utility model also provides an air filtering device. The air filtration device may comprise a filter cartridge as described above.

In particular embodiments, the air filtration device includes, but is not limited to, an air conditioner, a purifier, and the like.

By adopting the air filtering device with the filter element, the average air speed is high, the volatilization speed of functional substances is slowed down, and the user experience is better.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims (12)

1. A filter cartridge for filtering a gas, comprising:

a first filter layer;

the second filter layer is positioned at one side of the first filter layer; functional substances are attached to the second filter layer;

binding; the binding edge is used for fixing at least one of the first filter layer and the second filter layer;

the first filter layer and the second filter layer are fold filter layers, and the whole of the second filter layer covers and is attached to part of the first filter layer.

2. The filter cartridge of claim 1, wherein the second filter layer has an area less than or equal to 62% of the area of the first filter layer.

3. The filter cartridge of claim 1, wherein the first filter layer and the second filter layer each comprise a continuous plurality of pleats, and wherein the pleats of the second filter layer and the first filter layer in the overlap and fit region are identical.

4. The filter cartridge of claim 1, wherein the number of pleats on the first filter layer is greater than the number of pleats on the second filter layer.

5. The filter cartridge of claim 1, wherein the number of second filter layers in the filter cartridge is one.

6. The filter cartridge of any one of claims 1-5, wherein the second filter layer is located on an outlet side of the first filter layer.

7. The filter cartridge of claim 1, wherein the number of second filter layers in the filter cartridge is greater than two.

8. The filter cartridge of claim 7, wherein the functional materials attached to two or more of the second filter layers are different.

9. The filter cartridge of claim 7 or 8, wherein at least one of the second filter layers is located on the air outlet side of the first filter layer.

10. The filter cartridge of claim 5 or 7, wherein the second filter layer is flush with at least one edge of the first filter layer and is secured by the binding.

11. The filter cartridge of claim 10, wherein the binding edge comprises a first binding edge and a second binding edge disposed opposite each other; the first binding edge covers the first edge of the first filter layer and the third edge of the second filter layer, and the second binding edge covers the second edge of the first filter layer and the fourth edge of the second filter layer.

12. An air filtration device comprising a filter cartridge according to any one of claims 1 to 11.