JPH0244802Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of Industrial Application>> This invention relates to a filter element used in an air filter.

≪Prior Art≫ The conventional and commonly used filter element consists of filter paper that is alternately folded in mountain and valley directions in the horizontal direction.
It is formed into a chrysanthemum shape by rolling it into a cylinder. In order to increase the filtration area of this filter element, the number of folds in the circumferential direction is increased and the folds formed by the folds are made deep.

≪Problem that the invention aims to solve≫ However, in the case of chrysanthemum-shaped filter elements, each fold converges toward the center of the cylinder, so the number of folds is large, and the deeper the folds, the more adjacent they are. The deep parts of the folds are in close contact with each other, which reduces the number of filtration pockets and increases the reaction force resistance.

Therefore, this type of chrysanthemum-shaped filter element is suitable when the filter element has a large diameter and a low height, but when the case has a small diameter and a high height, the effective filtration area becomes small. The filtration efficiency was low.

Therefore, the purpose of this invention is to improve the filtration efficiency by making the pleats continuous vertically.

≪Means for solving the problem≫ In order to achieve the above-mentioned object, in this invention, mountain and valley folds are performed alternately in the vertical direction, and the mountain folds by the folding are performed by the number of divisions according to the polygon to be obtained. Then, a filter paper in which vertical mountain fold lines perpendicular to the valley fold lines are formed, and triangular valley fold lines directed toward the horizontal mountain fold lines are repeatedly formed at the intersection of each vertical mountain fold line with the horizontal mountain fold lines, is passed along each of the above-mentioned fold lines. It is characterized by the fact that it is folded to form a polygonal prism with continuous vertical bellow-like folds.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

FIG. 1 is a developed view of a filter paper constituting a filter element according to this invention, and FIG. 2 is an explanatory view of the main parts thereof.

The figure shows the case where it is applied to an octagonal columnar filter element, and the filter paper 1 has mountain fold lines 2 shown as solid lines and valley fold lines 3 shown as chain lines along the lateral direction.
are repeatedly formed and arranged in tandem at equal intervals in the vertical direction, and eight vertical peak fold lines 4 are formed at equal intervals perpendicular to each peak and valley fold line 2, 3.

At the intersection of each vertical mountain fold line 4 and horizontal mountain fold line 2, a triangular valley fold line 5 extending from the intersection point toward the horizontal valley fold line 3 side is repeatedly formed. This angle θ is set to an angle corresponding to the bending angle of each side of the octagon to be obtained.

The filter paper 1 having the above structure is folded along each of the fold lines 2 to 5, and as shown in FIG. is formed.

Further, in the horizontal direction, it is folded into an octagonal shape using the vertical mountain fold lines 4 as nodes, and is formed into an octagonal prism shape. At this time, in the folded portion, the interior angles of each side of the octagon are defined by folding inward using the valley fold line 5 as the fold line.

Then, if the ends of the folded filter paper 1 are glued together in this way, the porous cylinder 11 is inserted into the inner circumference, and the upper and lower ends are glued to the end plate 12 limited to the cylinder 11, the fourth The filter element is completed as shown in FIG.

In the embodiment, the filter element is formed into an octagonal prism, but it can be similarly formed into a triangular or more polygonal shape.

<<Effects of the invention>> As explained in detail in the examples above, according to this invention, since the bellows-like pleats form a continuous polygonal column in the vertical direction, compared to the conventional chrysanthemum-shaped filter element, When the filter is long and cannot be made large in diameter, there is no close contact between the folds and an accompanying increase in pressure resistance, thereby improving filtration efficiency.

Furthermore, with this invention, it is possible to obtain a polygonal bellows-shaped filter element that is more than a triangular prism, so that an innovative design can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a developed view of the filter paper constituting the filter element according to this invention, Fig. 2 is an explanatory view of the main parts thereof,
FIG. 3 is a perspective view of the main part in a folded state, FIG. 4 is a perspective view of the completed state, and FIG. 5 is an enlarged sectional view of the main part. 1...filter paper, 2...horizontal polygonal line, 3...horizontal valley polygonal line, 4...vertical mountain polygonal line, 5...triangular valley polygonal line, 10...fold.

Claims (1)

[Scope of utility model registration request] Along with alternating mountain and valley folds in the vertical direction,
A vertical mountain polygon line perpendicular to the mountain and valley polygon lines formed by the folding is formed by the number of divisions according to the polygon to be obtained, and a triangular shape pointing toward the horizontal mountain polygon line is formed at the intersection of each vertical mountain polygon line with the horizontal mountain polygon line. A filter element characterized in that a filter paper on which valley fold lines are repeatedly formed is folded along each of the fold lines to form a polygonal column in which vertically bellows-like pleats are continuous.