JPH0728891Y2 - Filtration element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a honeycomb-shaped filter element used for filtering gas, liquid and the like.

(Prior Art) As an air cleaner and an oil filter used in an internal combustion engine, a honeycomb-shaped filter element 20 as shown in FIG. 5 is widely used because it can secure a large filter area in a constant volume. .

That is, a corrugated filter medium 21 and a flat filter medium 22 of a certain size that have been corrugated are overlapped by a required number of steps with the corrugated filter medium 21 facing upward, and one corrugated filter medium 21 on one side edge (front side in the figure). While filling the mountain portion facing the lower flat filter medium 22 with a certain width of the sealing adhesive 23, the other side edge has a certain width of adhesive 23 in the valley portion facing the upper flat filter medium 22. After filling, a large number of bag-shaped ventilation holes whose front ends or rear ends are alternately closed are formed, and the side circumference except for the front and rear portions is covered with a cover 24.

(Problems to be solved by the invention) By the way, although the conventional filtration element has an advantage that a large filtration area can be obtained under a constant volume,
Since both the inlet side and outlet side end faces of the fluid are occluded by the adhesive for sealing, the flow resistance becomes high for the filter that processes a large amount of fluid, and the filtration function only deteriorates. Not
The life of the element will be shortened.

(Means for Solving the Problems) The present invention is directed to a downward grooved portion having one end integrated with both side pieces and an upper wall piece with the other end open, and both side pieces integrated with the other end with the lower wall. A bent filter medium is formed by alternately connecting upward groove portions whose one end is open, and a wrinkled filter medium having a large number of parallel corrugations is arranged below the bent filter medium. The filter piece is formed by adhering one end edge of the wall piece and the wrinkle filter medium, and the filter body is laminated or wound so that the downward groove portions are aligned with each other. The filter element is formed by adhering one edge of the wrinkled filter medium located on the edge of the filter element.

(Operation) The fluid to be processed enters the element through the inlet formed by the wrinkled filter medium that divides the downward groove and the other opening in which three filter walls are formed in a U shape, and passes through both side walls. At the same time, the dust passes through the upper wall piece and the wrinkled filter medium and is trapped by the filter medium. At this time, a small wave is formed between the upper wall piece and the lower wall piece arranged on both sides of the wrinkled filter medium, so that an air passage is secured, the air flows smoothly, and the entire filtering surface is effectively used.

(Embodiment) FIG. 1 shows an embodiment of the present invention, in which a filter element 1 is composed of a bent filter medium 2 of a certain length and a wrinkled filter medium 3 formed of a filter medium such as nonwoven fabric or filter paper. A required number of layers of the wrinkled filter medium 3 are sandwiched between the upper and lower curved filter media 2, and the side circumference except the front surface and the rear surface is covered with a cover 4 such as a filter material or a synthetic resin.

As shown in FIG. 2, the bent filter medium 2 has a rectangular side wall piece 11 and a triangular upper wall piece 12 that abut at one end (the rear end in the figure), and has a triangular shape in a plane triangle shape and the other end. Downward groove portion A (front end in the figure) opened, and the other end (front end)
Rectangular side pieces 11 and triangular lower wall piece 13 that abut at
And, the bent filter medium 2 is formed by alternately and continuously forming an upward groove portion B having a triangular shape and a U-shaped cross section and the other end (rear end) of which is open. As shown in FIG. 3, the bent filter medium 2 has a constant gap (side piece 11) on the raw material filter medium 5 such that the boundary slant line l ₁ of the upper wall piece 12 is a solid line and the boundary line l ₂ of the lower wall piece 13 is a dotted line. The width of the side pieces 11 at the front end and the rear end are integrally bonded to each other by bending them downwards or upwards by a molding roll along the slanted lines l ₁ and l _2. There is.

The upper and lower bent filter papers 2 are stacked so that the downward groove portions A and the upward groove portions B are aligned, and the wrinkled filter material 3 is disposed between the upper and lower bent filter materials 2 as described above. The bent filter medium 2 and the wrinkled filter medium 3 form a filter body. The upper surface of the upward curved groove portion B of the lower curved filter material 2 and the lower surface of the downward groove portion A of the upper curved filter material 2 are closed, and at the front end side, the lower edge and the lower edge of the wrinkled filter medium 3 are closed. The upper edge of the bent filter medium 2 is bonded with the adhesive 6, and the upper edge of the wrinkled filter medium 3 and the lower edge of the upper bent filter medium 2 are bonded to each other by the adhesive 6 on the rear end side. The wrinkled filter medium 3 is formed with a so-called corrugation that is slightly wavy. Further, the upper surface of the upward groove portion B of the uppermost bent filter material 2 is closed by the upper wall of the cover 4 and the front edge is bonded and sealed with the adhesive 6, and the lower surface of the downward groove portion A of the lowermost bent filter material 2 is closed. Is closed by the upper wall of the cover 4 and the rear edge is joined and sealed with an adhesive 6.

When the fluid to be treated enters the filtering element 1 from the downward groove portion A of the bent filter medium 2 in the front side, it is filtered across the left and right side walls 11 and enters the adjacent clean room, and the upper wall piece 12 and the lower wall piece 13 are removed. The flow path formed by the corrugated tops of the wrinkled filter media 3 coming into contact with each other advances to the depth, is filtered across the surfaces of the upper wall piece 12 and the wrinkled filter media 3, and flows out backward from the upward groove portion.

As another embodiment, as shown in FIG. 4, a filter body formed by adhering a wrinkled filter medium having a large number of parallel corrugations to the end of the downward groove portion which is one end of the bent filter medium 2. Is wound around a core 15 whose one end is closed to form a filter element 16, which is housed in a housing 17 having a port.

(Effects of the Invention) As described above, the present invention forms a filter body by adhering a wrinkle filter medium to one end of a bent filter medium having a downward groove portion and an upward groove portion to form a filter body, and align the downward groove portions. Since the bent filter medium and the wrinkled filter medium located on the bent filter medium are adhered to each other at one end of the filter body, the corrugated tops of the wrinkled filter medium and the upper wall piece of the bent filter medium and A fluid passage is formed between the corrugations of the wrinkled filter media, which respectively abuts the wall pieces, thus preventing the filter layer from sticking and can be used as the entire filtering surface of the filter media, thus prolonging the service life of the element and ventilation resistance Can be lowered.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of an embodiment of the present invention is cut away, FIG. 2 is a partial perspective view showing an arrangement state of upper and lower bent filter media and wrinkled filter media, and FIG. 3 is a development of the bent filter media. FIG. 4 is a partial plan view showing a state, FIG. 4 is a sectional view of another embodiment, and FIG. 5 is a perspective view of a conventional filtration element. 1 ... Filtration element, 2 ... Bent filter material 3 ... Wrinkled filter material, 11 ... Side piece 12 ... Upper wall piece, 13 ... Lower wall piece A ... Downward groove part, B ... Upward groove shape Department

Claims (1)

[Scope of utility model registration request] 1. A downwardly-grooved groove portion having two ends and an upper wall piece which are adhesively sealed at one end, and an upwardly-opening groove portion which has both ends and adhesively sealed at the other end. The bent filter medium is formed by alternately connecting the portions, and a wrinkled filter medium having a large number of parallel corrugations is arranged below the bent filter medium.The lower wall piece and the one edge of the wrinkled filter medium are arranged at one end of the bent filter medium. The filter body is adhered to form the filter body, and the filter body is laminated or wound with the downward groove portions aligned with each other, and the upper wall piece of the bent filter medium and one edge of the wrinkle filter medium located on the upper wall piece are adhered. Filtration element.