JPH055931Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present application relates to a super-element used in an intake system or a lubrication system of an internal combustion engine.

[Conventional technology]

As shown in Japanese Patent Application Laid-open No. 61-291015 filed by the present applicant, a conventional super-element is made by folding a sheet-like material 1 into a large number of pleats consisting of peaks 2 and valleys 3. A ridge 4 is formed, both slopes of each ridge at one end of the ridge are brought close to each other, and a first joint 5 is formed by joining from the top of the inner surface of the ridge to a predetermined position, and further Both slopes of each valley at the other end of the pleat are brought close to each other, and the inner surface of the valley of the pleat is joined from the bottom to a predetermined position to form a second joint 6.
(Fig. 3, Fig. 4).

[Problem that the invention attempts to solve]

The over-element acts in such a way that fluid enters from one end and upper surface thereof, enters the trough 3 of each pleat 2, and then flows out through the other end and lower surface of each pleat. During this time, the dust in the fluid is filtered out. However, the gap within each fold through which fluid flows and flows out has an approximately triangular cross section, and gradually narrows from one end to the other, and in particular, the closed end at one end of the gap is It's converging rapidly. Therefore, the peaks around the closed end within the pleat are close together, which has the disadvantage of reducing the effective overarea.

[Means for solving problems]

The structure was such that both ends of the open end of the lower surface of the inlet channel formed between each fold formed an arc shape.

[Effect]

Since the folds on both sides of the inflow channel are close to each other due to the above-mentioned circular arc structure on the open end side, the folds in that part expand conversely and do not close together early, preventing a reduction in excess area due to blockage of dust pockets. do.

〔Example〕

In FIGS. 1 and 2, the over-element 30 is
It is made by folding a sheet-like material 31 made of paper, nonwoven fabric, etc. to form a large number of pleats 32. The material 31 has folds 32 at predetermined intervals.
a, 32b alternately, and the lower end of the fold 32a has a chevron-shaped fold 33, and the fold 32b
An inverted chevron-shaped fold line 34 is connected to the upper end of each. The size of the chevron is that fold 33 is fold 3.
It is larger than 4. An adhesive layer 35 of a predetermined width is provided on the surface along the upper edge of the material 31,
An adhesive layer 36 is similarly provided on the back surface of the lower edge. Here, the bottoms of both sides of the chevron fold 33 are:
It forms a circular arc 33a.

By folding such a material 31 along each fold line and bonding the upper and lower edges with adhesives 35 and 36, a filter element 30 as shown in FIG. 2 is formed.

The filtration element 30 has a large number of folds 32 arranged radially upright, and between the folds 32 there is an inlet passage 37 that is open at one end, closed at the other end, and open at the top. Moreover, the inside of the pleat 32 forms an outflow path that is closed at one end, opened at the other end, and further opened at the lower surface. Both sides of the open end side of the lower surface 37a of the inflow path 37 form a circular arc, and the gap in the folds 32, 32 located on both sides of the open end side is expanded outward.

The over-element 30 in FIG. 2 is circular, but the chevron-shaped fold 3 in the material 31 in FIG.
If 3 and 34 are made the same size, they will be rectangular.

In FIG. 2, the fluid flowing in from the inflow passage 37 of the over-element 30 flows through the surrounding folds 32 and flows out into the outflow passage inside the fold. Lower surface 3 of inflow channel 37
The fluid also flows through 7a and the closed end. During this time, dust in the fluid is removed. Both sides of the open end of the lower surface 37a of the inflow channel 37 form an arc,
The inside of the folds 32 on both sides are expanded.

〔effect〕

As described above, in the over-element of the present invention, both sides of the open end of the inflow path formed between the folds form an arc shape, and the folds on both sides are brought close to each other, so that the inside of the folds in that part expands inversely. This eliminates the disadvantage of shortening the service life by bringing both pleats into close contact and reducing the excess area.

[Brief explanation of drawings]

FIG. 1 is a plan view of the material constituting the over-element of the present invention, FIG. 2 is a perspective view of the over-element of the present invention,
FIG. 3 is a plan view of a material used in a conventional over-element, and FIG. 4 is a perspective view of the conventional over-element. 30... Over element, 31... Material, 32... Fold, 32a... Circular arc, 37... Inflow path, 37a...
...lower surface of the inlet channel.

Claims (1)

[Scope of utility model registration request] It has a large number of folds at predetermined intervals, a chevron-shaped fold is connected to the fold of one of the adjacent pleats, an inverse chevron-shaped fold is connected to the fold of the other pleat, and the surface of the upper edge and the back surface of the lower edge are formed. A sheet-like filter medium having an adhesive layer provided over a predetermined width is folded along the fold line to form a large number of pleats,
In a filtration element in which an inflow path is formed between each pleat,
The above-mentioned filtration element is characterized by a structure in which both sides of the open end of the lower surface of the inflow channel are arcuate, and the spaces within the folds of the inflow channel are expanded.