JPH0331373Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present application relates to a filter element used, for example, in an air cleaner for an internal combustion engine.

[Conventional technology]

As shown in FIG. 7, a filter element used in an air cleaner for an internal combustion engine, etc., is made by laminating a large number of corrugated plates 1 and flat plates 2, each having peaks 1a and troughs 1b, alternately. The trough portions 1b of the plate material 1 and the peak portions 1a of the corrugated sheet material 1 on the other side are filled and sealed with an adhesive or the like. A large number of channel chambers 3 are formed between one side and the other side, with one end open and the other end closed.

Intake air flows in from the open end of the channel chamber 3 on one side, that is, the trough 1b of the corrugated sheet material 1, and flows out to the closed end side on the other side. During this time, the dust in the intake air is captured by the materials 1 and 2 surrounding the flow path chamber 3.

[Problem that the invention attempts to solve]

The so-called honeycomb type filter element with the above structure has the advantage of having a larger overarea and longer life than the so-called pleated type filter element made of chrysanthemum-shaped folded origami paper. Valley part 1 of corrugated sheet material 1
Since b is filled, the inflow cross-sectional area is small in comparison to the large overflow area, which has disadvantages such as high flow resistance, early clogging of the inflow surface, and insufficient utilization of the internal overflow surface.

[Means for solving problems]

Two element elements having a large number of pleats, end walls provided alternately at the upper and lower ends of the pleats, and adjacent pleat pieces at the upper and lower ends alternately joined, are stacked with the end walls facing each other, The filter element has a structure in which both end walls are joined and sealed.

[Effect]

Intake air is introduced from the inlet face of the filter element, enters the interior through the spaces between the folds of the element elements, passes through the paper forming the pleats, and flows out from the spaces between the folds of the element elements on the outlet face.

〔Example〕

FIG. 1 shows a filter element 10 of the present invention, which has a structure in which a plurality of element units 11 each consisting of two element elements 11a and 11b are stacked.

The elements 11a and 11b are each formed by folding a rectangular sheet-like filter paper 20 along the fold lines as shown in FIG. That is, the sheet-like filter paper 20 has pleats 21 extending vertically at predetermined intervals. Every other fold 21 has a chevron-shaped fold 23 on the filter paper 20.
It is continuously provided on the lower end 24 side of. In addition, the fold 21 of the fold next to the fold 21 of the fold with this chevron-shaped fold 23 has an inverse chevron-shaped fold 2
3a is continuously provided on the upper end 25 side of the filter paper 20. On the upper end 25 side and the lower end 24 side of the surface of the sheet-like filter paper 20, there are adhesive layers 26, 2 of a predetermined width.
6 is formed.

Fold the sheet filter paper 20 along the folds 21, 23, 23a.
When folded along the sides, as shown in Figure 3,
A large number of parallel pleats 35 are formed. folds 35
At the upper and lower ends, end walls 8a, 40, 18 corresponding to the chevron-shaped fold 23 and the reverse chevron-shaped fold 23a are provided.
b, 41 is formed. The end walls 18a, 18b and the end walls 40a, 40b are formed alternately at the upper and lower ends of the pleats 35. When the adjacent pleat pieces b and c at the upper end of the pleat 35 are brought into contact with each other and the pleat pieces a and b at the lower end are brought into contact with each other, the adhesive layer 17 joins and seals these respective pleat pieces. Each pleat piece at the upper and lower ends will be joined and sealed alternately.

The element elements 11a and 11b are stacked so that the end walls 18a and 18b of the pleats 35 face each other,
A sealant is filled between these end walls 18a and 18b, and the space between them is bonded and sealed. Additionally, the laminated portions on the left and right sides are also bonded and sealed. As shown in FIG.
It is also possible to provide

Other elements 11c and 11d are also formed in the same manner. Element elements 11a, 11
b, 11c, and 11d are stacked as shown in FIG. 1, and the stacked sides are bonded and sealed to form the filter element 10.

FIG. 9 shows another example of a sheet-like filter paper, in which the height of the inverted chevron-shaped folds in FIG. 2 is made higher than the height of the chevron-shaped folds.

To show another embodiment, as shown in FIG. 1, flat filter media (not shown) are integrally joined to four sides of the filter element 10 except for the front side (inflow side) and the back side (outlet side). . As shown in FIG. 9, the elements 11b and 11c on the inflow surface side
A porous body 32 made of a perforated plate, a steel plate, or the like may be inserted into the gap formed between the two to form a reinforcing structure. Similarly, the element element 11 on the outflow side
a, 11b and element elements 11c, 11d
The porous body 32 can also be inserted into the gap between the two.

In FIG. 1, intake air flows in from the inflow surface (front side) and flows toward the outflow surface (back side). Intake air enters the space between each pleat 35 on the inflow surface, passes through each pleat 35, and exits from the space between adjacent other pleats 35 on the outflow surface.

〔effect〕

The filter element of the present invention does not have the filling seal portions of peaks and valleys like the conventional ones, so the cross-sectional area of the inlet and outlet at the inlet and outlet surfaces is larger than that of the conventional one (approximately 50
% increase), which avoids early clogging at the inflow surface and increased distribution resistance. In addition, since there is no flat plate material between the corrugated plates as in the conventional case, the over-chamber space formed between each fold becomes large, allowing air to flow over the entire surface of the material, thereby improving the service life. Furthermore, if the performance is the same as before,
It can be made more compact.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the filter element of the present invention, Fig. 2 is a plan view of a sheet of paper, Fig. 3 is a perspective view of a folded sheet of paper, and Fig. 4 is a perspective view of a filter element of the present invention.
5 is a rear view of the filter element of the present invention, FIG. 6 is a perspective view of another embodiment of the filter element, and FIG. 7 is a perspective view of a conventional filter element. FIG. 8 is a plan view of another sheet-like paper, FIG. 9 is a sectional view of another embodiment of the filter element, and FIG. 7 is a perspective view of a conventional filter element. DESCRIPTION OF SYMBOLS 11... Element unit, 11a... Element element, 11b... Element element, 12... Sheet-like paper, 13... Crease of pleats, 14... Chevron fold, 17... Adhesive material layer.

Claims (1)

[Scope of utility model registration request] Two element elements having a large number of pleats, end walls provided alternately at the upper and lower ends of the pleats, and adjacent pleat pieces at the upper and lower ends alternately joined, are stacked with the end walls facing each other, A filter element with a joint seal between both end walls.