JP2557560Y2 - Filtration element - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element formed by folding a sheet-like filter medium to form a plurality of crests and valleys, and is particularly preferably used as an air filter element for an internal combustion engine of an automobile or the like. Is what is done.

[0002]

2. Description of the Related Art It is well known that a filter element is formed by alternately folding a sheet of filter material at predetermined fold intervals to form a saw-tooth cross section to form a flat filter body as a whole.
Since such a filter element is generally flat and the height of the element body in the filter direction is low, for example, the air for an internal combustion engine is particularly used in an engine room of an automobile in which a mounting space in the height direction is limited. It is suitable for use as a filter element.

[0003]

However, the conventional filter element as described above is obtained by simply bending one sheet of filter medium alternately at a predetermined fold interval, so that an effective filtration area is secured. It is difficult to perform, and the strength is not enough.

An object of the present invention is to be able to mount and use in a limited space such as an engine room of an automobile, to increase a filtration area and improve a filtration efficiency, and to improve strength. An object of the present invention is to provide a filter element which is excellent and can withstand long-term use.

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention has been made. That is, in the present invention, in a filter element in which a sheet-like filter medium is alternately bent at a predetermined fold interval to form a number of peaks and valleys, the folds are bent at a certain angle in one direction from the middle of the fold. The fold of the fold is provided in the valley, and the valley is provided with a bend which is turned into a ridge with the refraction as a boundary,
In addition, the bending portion is formed in at least two places so as to be bent alternately toward the inflow side and the outflow side of the fluid along one fold direction, and a flat filter body is formed in the fold direction as a whole. Filter element. Further, in the filter element as described above, one end of the filter medium in the fold direction is expanded so that the center side is located on the other side, and the other end is located on the outer peripheral side, and the expanded direction is orthogonal to the fold direction. This is a filter element in which the ends of the filter media on the side are joined to form a generally disc-shaped filter body as a whole.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a filter medium portion of an embodiment of the filter element according to the present invention. FIG. 2 is a plan view showing a developed state of the filter medium shown in FIG. FIG. 4 is a side sectional view showing a processing example of a joint portion between an end portion of a filter medium and a frame, and FIG. 5 is a plan view showing another embodiment.

As shown in FIG. 1, a sheet-like filter medium 1 having a large number of folds formed by being alternately bent at predetermined fold intervals.
Has a refraction shape of approximately M type (type in which W is upside down) by being alternately refracted three times in the fold direction,
The filter is formed as a flat rectangular filter as a whole. The developed state of the filter medium 1 constituting such a filter is as shown in FIG. That is, the filter medium 1 includes
a, 11b, 11c, 11d folding line (solid line),
Folding lines (broken lines) forming the valleys 21a, 21b, 21c, and 21d and bending lines 31, 32, and 33 are formed, and the filter medium 1 is formed by folding the filter medium 1 in accordance with the formed folding lines. Can be. That is, as is clear from FIGS. 1 and 3, the ridges 11a of the folds of the filter medium 1 are bent at a fixed angle at the bending portions 12a, and the valleys 2a.
1a is refracted at the refraction part 22a. The bending portions 12a and 22a are formed by bending portions 31 shown in FIG. And these refraction parts 12a, 22
The ridge 11a of the pleats becomes the valley 21b and the valley 2
1a is folded into a crest 11b. The direction of refraction at this time is toward the fluid filtration side as shown in the figure. Further, the valley portion 21b of the fold is located at the peak portion 11c, the peak portion 11b is located at the valley portion 21c, and the bending portions 12b and 22b are respectively provided.
Has been turned around. The refraction direction at this time is opposite to the refraction direction in the refraction portions 12a and 22a, that is, toward the fluid inflow side. The ridge 11c is in the valley 21d, and the valley 21c is in the ridge 11d.
Are folded at the bending portions 12c and 22c, respectively. The refraction direction at this time is determined by the refraction portions 12b and 2b.
The direction is opposite to the refraction direction in 2b, that is, toward the outflow side of the fluid. As described above, three bending portions are formed so as to be bent alternately toward the inflow side and the outflow side of the fluid along one fold direction, and a flat filter body is formed in the fold direction as a whole. -ing Such an alternately bent fold structure increases the filtration area and increases the rigidity. In addition, since there is no seam of the fold at the bending portion, the strength is excellent in structure, and the filtration area is formed by the seam of the fold. Does not decrease.

As shown in FIG. 3, a frame 41 made of synthetic resin having a peripheral flange 42 is usually integrally formed and joined around the filter medium 1 constructed as described above. (Not shown), the peripheral flange 42 is mounted and used so as to be engaged with the case. In the above embodiment, the cut shape of the end portion 15 of the filter medium 1 was changed to
The processing of the joint between the end portion 15 and the frame body 41 may be performed as shown in FIG. Although not shown, if necessary, along the fold direction or intersecting with the fold,
Reinforcing ribs may be provided in connection with or integrally with the frame.

Further, the filter material 1 formed with the folds as described above is placed such that one end of the filter material in the fold direction is the center side,
Expanded so that the other end is on the outer peripheral side, and was expanded,
By joining the ends of the filter medium on the side perpendicular to the fold direction, a substantially disc-shaped filter body as a whole as shown in FIG. 5 can be formed. Even with such a configuration, the effect of the filtration element of the present invention can be achieved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. In the above-described embodiment, an example is described in which three refraction portions that are alternately refracted toward the inflow side and the discharge side of the fluid are formed along one fold direction. For example, the number of refraction portions is two. Or four or more locations.

[0011]

According to the present invention, at least two bending portions are formed so as to be bent alternately toward the inflow side and the outflow side of the fluid along one fold direction, and the folds are formed as a whole. Since a flat filter body is formed in the direction,
It is suitable to be used in a limited space such as the engine room of a car, and has a folded fold structure that is inserted between the folds to maintain a constant fold interval and to close the filter media together. Can be prevented, the filtration area is increased, and the rigidity is increased, so that it can withstand long-term use.
In addition, since there is no seam of the fold in the bent portion, the structure is excellent in strength, and the seam of the fold does not reduce the filtration area.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a filter medium portion of a filtration element according to the present invention.

FIG. 2 is a plan view showing a deployed state of the filter medium shown in FIG.

FIG. 3 is a side sectional view showing the embodiment shown in FIG. 1 with a frame.

FIG. 4 is a side sectional view showing an example of processing of a joint between a filter medium end portion and a frame.

FIG. 5 is a plan view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter medium 11a, 11b, 11c, 11d Peak part 12a, 12b, 12c Refraction part 21a, 21b, 21c, 21d Valley part 22a, 22b, 22c, Refraction part 31, 32, 33 Refraction part bending line

Claims (2)

(57) [Scope of request for utility model registration] 1. A filter element in which a sheet-like filter medium is alternately bent at a predetermined fold interval to form a number of peaks and valleys, and is bent at a certain angle in one direction from the middle of the fold. The ridges of the folds are at the valleys with the folds as boundaries, and the valleys are provided with bends that can be turned into ridges, respectively, and the bends are along one fold direction,
A filter element, wherein at least two or more portions are formed so as to be alternately bent toward an inflow side and an outflow side of a fluid, and a flat filter body is formed as a whole in a fold direction. 2. The pleated filter element according to claim 1, wherein the filter element is expanded so that one end of the filter medium in the fold direction is the center side and the other end is the outer peripheral side. A filter element, wherein an end of a filter medium on a side orthogonal to a direction is joined to form a substantially disc-shaped filter body as a whole.