JPS5891361A - Filter element of air cleaner for internal-combustion engine - Google Patents

Abstract

PURPOSE:To increase an effective filtrating area with respect to the occupying volume thereof and enable to form the sealing part for accommodating it into a casing easily, in an air cleaner element. CONSTITUTION:A filtrating sheet 1a has a semi-circular inner peripheral rim and a semi-circular outer peripheral rim coaxial to the inner rim while both ends thereof is cut by a diametral line passing through the center of the circle. The sheet 1a is bent into up-and-down directions alternately along a plurality of radial lines dividing the sheet with equi-angular intervals. The ridges 11 of respective mountain parts are turned downwardly at the side rims of the outer periphery thereof while the ridges 12 of respective valley parts are turned upwardly at the side rims 121 of the inner periphery thereof. A reinforcing member 2 of a punching metal is arranged along the inner peripheral surface of the filter element 1 and a ring-shaped upper seal member 3 of resin is adhered to the ridge parts 121 by an adhesive agent while the ring-shaped lower seal resin member 4 is adhered to the ridges 111 by the adhesive agent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter element for an air cleaner for an internal combustion engine installed in a vehicle.

The filter element of a conventional air cleaner for an internal combustion engine installed in a vehicle is generally constructed by forming a band-shaped furnace material sheet into a corrugated shape into a cylindrical shape, as shown in FIGS. 1 and 2. The inner side is reinforced with a cylindrical punching metal 2, and an annular seal member 314 is joined at the top and bottom, and the structure is housed in a casing.

Therefore, there is a limit to reducing the spacing, and there is also a limit to the size of the effective filtration area.The effective filtration area is small compared to the occupied volume.Therefore, the pressure loss during use is large and the pressure loss decreases over time. It rose and had to be replaced often.

Therefore, the present invention can further increase the effective filtration area relative to the occupied volume than conventional filter elements,
It is an object of the present invention to provide a filter element for an air cleaner that can easily form a seal portion when stored in a casing.

The filter element of the present invention has a member sheet whose inner peripheral edge and outer peripheral edge are in a concentric arc shape, and whose both ends are cut along a line extending from the center of the arc, and which is folded along a plurality of lines that cross the member sheet. It is bent and formed into a wave shape, and the outer peripheral edge side of the ridge line of the peak part is folded downward and the inner peripheral edge side of the ridge line of the valley part is folded upward to form an element divided material, and a plurality of divided materials are joined in an annular shape. Ru. Therefore, the filter element of the present invention has the folded portions on the inner and outer edges, thereby reducing the volume occupied by the filter element and ensuring a large effective filtration area.・The details of the present invention will be explained below with reference to the illustrated embodiments. ・FIGS. 4 and 5 constitute the filter element F of the present invention. This shows a divided material. To form the divided material 1A, as shown in FIG. Prepare the F material sheet 11 cut in the F material sheet 1a.The F material sheet 1a is made of F paper made of resin or glass fiber nonwoven fabric. F material sheet) 1m is alternately bent up and down along a plurality of radial lines dividing the sheet at equal angular intervals. The ridgeline 11 of each peak is the outer peripheral edge side 11 of the F material sheet.
1 is folded downward, and the ridgeline 12 of each valley is on the inner peripheral edge side 1
21 is folded upward. In the figure, the solid lines are the bending lines that form the ridges of the mountains, and the dashed-dotted lines are the bending lines that form the valleys of the mountains. Then, as shown in Fig. 4, one divided member bent as described above is shortened to 1/3 in the length direction, that is, 40@, and the thus formed 6 divided members IA+IB*IC
ID*IEtIF are joined into a ring as shown in FIG. 6 to form a filter element. In this case, the folded portion 111.121 of the ridge line 11112
can be parallel.

Next, as shown in FIG.
A ring-shaped upper sealing member 1 made of resin is disposed along the ifE and arranged in a plane on the ridgeline portion 121.
are joined with adhesive. Further, a ring-shaped lower seal member 4 also made of resin is bonded to the ridge line portions 111 arranged in a plane with an adhesive.

FIG. 8 shows a state in which the filter element 1 with the seal member 3 #4 attached thereto is housed in the casing. The casing 5 is a fist lower casing s consisting of a container-shaped lower casing 5b and a cap-shaped upper casing 5a.
A rubber member 6 is formed into a sheet shape by molding on the bottom surface of b. The filter element 1 is placed in the lower casing 5b with the lower seal member 4 brought into close contact with the rubber member 6.Next, the upper casing 5a is arranged to cover the upper surface of the filter element 1, and its lower end opening and The filter element 1 is housed in the casing 5 integrated with the upper end opening of the lower casing 5b.

A cup (-plate 7) is welded to the inner diameter surface of the lower casing 5b at its outer peripheral edge. In addition, a through port 10 is provided upright on the carburetor main body 8, and the port 10 is located at the center of the reinforcing member 2 disposed within the filter element 1 and at the upper seal member 5. It protrudes outside the upper casing 5a through the center hole.

By tightening the through bolt 10 from the upper end, the casing 5 is fixedly pressed against the carburetor main body 8, and the filter filter 1 is held between the upper and lower casings 5a*5b in the casing S. Retained.

When the internal combustion engine is in operation, air is introduced into the casing 5 through the air introduction hole 51 formed in the upper casing 5a and passes through the filter element 1. At this time, the pollutants are collected by the filter element 1, and the purified air passes through the reinforcement member 2 made of punched metal and passes through the vaporizer main body a.
The filter element F of the present invention is as shown in FIG.
Since the C filtration surface is arranged in an inclined direction and housed in the casing, and the outer peripheral edge side of the material sheet is folded back, it has a large effective area relative to the occupied volume.

Therefore, the pressure loss is also small (compared to the conventional type, the pre-use period is longer). Furthermore, since a planar sealing surface is formed by the folded portions on the outer diameter side and the inner diameter side, installation in the casing is also easy.

The table below shows the air cleaners (No. 1) currently in general use.
Figure 2) and an air cleaner equipped with a filter element according to the present invention of approximately the same size.In the conventional air cleaner with the above dimensions, the extended area of the filter element is 2. (HILOOO- is almost the limit, and if the waveform is narrowed further, the filter surfaces will come into contact.) If the filter element of the present invention is used, the extended area (effective F
It is possible to increase the M open area by approximately 35%. At the same time, pressure loss can also be significantly reduced.

Figure 9 shows the relationship between the distance traveled by the collector and the ventilation resistance of the product of the present invention and the conventional product. eThe product of the present invention is 6 SC lower than the conventional product at the same travel distance.

Shows low aerodynamic resistance.

In the above example, a filter element was constructed by bending an 18° F material sheet to reduce it to 60°, molding it in this way, and joining six pieces of the filter element divided materials. The number of divided materials and the degree of reduction in half can be determined depending on the density of the waveform of F.

Also, the above 5I! In the example, the filter element and the upper and lower sealing members were joined using adhesive.
When molding the upper and lower resin seal members, the filter element and the reinforcing member can also be integrated and molded.

[Brief explanation of drawings]

Figures 1 and 2 show conventional filter elements, with the first part being a longitudinal sectional view, Figure 2 being a sectional view taken along the line 1-1 in Figure 1, and Figures 3 to 8 showing the filter element of the present invention. This shows an example. The figure is a plan view of a member sheet, Figure 4 is a plan view of a divided material, Figure 5 is a side view of Figure 4, and Figure 6 is a combination of divided materials. Fig. 7 is a longitudinal sectional view of the filter element, Fig. 8 is a longitudinal sectional view of an air cleaner equipped with the filter element, and Fig. 9 shows experimental results regarding the performance of the filter element of the present invention and the conventional filter element. FIG. 1. Conflict... Filter element 1a/Φ... P material sheet IA+IB*IC+ID reference IElIF-@・-Fist Niremeji F divided material 11112... Folding line 111 or 1216. ,,・Folded portion 3-4...Sealing rubber member 5---・Casing 8...L・Carburizer main body Fig. 1 Fig. 3

Claims (1)

[Claims] A furnace material sheet having an inner circumferential edge and an outer circumferential edge in an arc shape centered on a predetermined center point, and both ends of which are trimmed with rays extending from the center point, is bent with a plurality of rays crossing in the radial direction to form a corrugated shape. None, and the part on the outer peripheral edge side of the ridge line of the peak part is bent downward, and the lower surface of the bent part forms a lower sealing surface to the element storage casing, and the part on the inner peripheral edge side of the ridge line of the valley part is bent upward. This filter element for an air cleaner for an internal combustion engine is formed into an annular body by joining a plurality of element divided materials whose upper surfaces form an upper sealing surface to a re-element storage container at both ends.