JPH0244831Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present application relates to an air cleaner used, for example, in an internal combustion engine.

[Conventional technology]

As shown in FIG. 5, a conventional air cleaner for an internal combustion engine includes a casing 3 having an inlet and an outlet 1, 2.
It has a structure in which a filter element 4 is fixed by a support 5. Filter element 4 is
A sheet-like rectangular paper is folded to form an annular overbody, which is arranged around a porous inner cylinder 6, and end plates 7, 8 are provided at the upper and lower ends thereof. 9 is punching. Filter element 4 and casing 3
An annular chamber 10 is formed between the two.

The intake air enters through the inlet 1 of the casing 3 and is then introduced into the filter element 4 from the annular chamber 10 . Here, the intake air is filtered and flows out through the outlet 2.

[Problem that the invention attempts to solve]

In the air cleaner having the above structure, the intake air flowing in from the outer periphery of the filter element 4 needs to enter the annular chamber 10 once, and the volume of the annular chamber 10 must be increased in order to reduce the flow resistance. Therefore, the external shape of the casing becomes large, resulting in a disadvantage that the size of the casing increases.

[Means for solving problems]

A case provided with an inflow/outlet has folds at predetermined intervals, and every other fold has a chevron-shaped fold extending upward from one side edge, and further includes a front surface of one side edge and a back surface of the other side edge. A rectangular sheet of paper with an adhesive section is folded along the fold line, both ends are joined to form a ring-shaped overbody, and a filter element with an end plate is arranged on one of the upper and lower ends to form a filter. The air cleaner has an outer periphery of the element close to or in contact with the inner peripheral wall of the case.

[Effect]

Inlet air enters between the pleats at the open end of the filter element and passes through each pleat. The interval between the folds at the open end is large, and there is no need for an annular chamber for introducing intake air between the outer circumference of the filter and the inner circumferential wall of the case.

〔Example〕

FIG. 1 shows an air cleaner of the present invention, in which a filter is installed in a housing formed by an upper case 12 having an inlet 11 in the center and a lower case 13a having an outlet 13 in the center. The element 14 is arranged. A bridge 15 with a nut is erected around the outlet 13 of the lower case 13a. The filter element 14 is fixed in the housing by a support 18 inserted into the center opening 17 of a disc-shaped support plate 16 placed on the inner periphery of the upper end of the filter element 14 . 19,20
is a pack king. Filter element 14
The outer periphery of the upper case 12 is close to or in contact with the inner peripheral wall of the upper case 12 .

The filter element 14, as shown in FIG.
It has folds 21 at predetermined intervals, and every other fold has a chevron-shaped fold 22 extending upward from one side edge, and an adhesive part 23 is provided on the surface of one side edge. A rectangular sheet paper 25 with an adhesive part 24 on the back side is pleated along the folds 21 and 22, placed around the porous inner cylinder 26, and both ends are joined to form an annular overbody. , a thin donut-shaped end plate 27 is fixed to one of the upper and lower ends (lower end in FIG. 1). In this filter element 14, the pleats 28, 28 at one end are open, the pleats 28, 28 at the other end are closed, and the pleats 28, 28 at either end are closed. The structure is separated by chevron-shaped walls 29 formed by the chevron-shaped folds 22 (FIG. 3).

FIG. 4 shows another embodiment, which has an outlet 30 in the center, a bridge 31 with a nut erected upward around the outlet, and an inlet 32 outside the outlet 30. A filter element 35 is disposed within a housing formed by a lower case 33 and an inverted upper case 34. Filter element 35 is similar to filter element 14 of FIG. 1 except that the end plate structure is different. That is, the filter element 35 includes the support body 16 and the end plate 2 of the filter element 14.
A disc-shaped support end plate 36 made of four pieces of 7 and 7,
It has one end. Filter element 35
is fixed in the housing via the nutted bridge 31 by a support 37. 38, 39
is a pack king. Further, the outer periphery of the filter element 35 is close to or in contact with the inner peripheral wall of the upper case 34 .

In FIG. 1, the intake air flows into the housing from the inlet 11 and reaches the open end at the upper end of the filter element 14. From there, the intake air flows along the folds of the filter element 14, passes through the paper on the inner circumferential surface of the filter element 14, and passes through the outlet port 1.
Outflow towards 3. The intake air passes through the filter element 14 while passing through it. Intake air flows into the upper end of the filter element 14 with a large pleat interval.

In FIG. 4, intake air flows in from the inlet 32 of the lower case 33, flows through the inner peripheral surface of the filter element 35, and flows out to the outlet 30. Inspiration is passed in between.

〔effect〕

The present invention provides a filter element in which the pleats at one end are separated by a chevron-shaped wall, the creases at the other end are closed, and an end plate is provided at either end, and an inlet is provided. The outer periphery of the filter element is arranged close to or in contact with the upper and lower cases, and the end of the filter element that does not have an end plate is the intake side. This allows air to flow in and out to the inner circumferential surface of the filter element, eliminating the need to form an annular chamber for introducing intake air between the filter element and the inner circumferential wall of the case.
The size can be reduced without increasing the flow resistance.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the air cleaner of the present invention, Figure 2 is a sectional view of the air cleaner of the present invention,
3 is a perspective view of a filter element without an end plate, FIG. 4 is a sectional view of another embodiment of the present invention, and FIG. 5 is a conventional filter element. It is an air cleaner sectional view. 11, 13... Inflow/outlet, 12, 13a... Upper and lower cases, 14... Filter element, 25...
...Sheet paper.

Claims (1)

[Scope of utility model registration request] A housing consisting of a case provided with an inlet and an outlet has folds of pleats at predetermined intervals, every other fold has a chevron-shaped fold extending upward from one side edge, and further includes a surface of one side edge and a chevron-shaped fold extending upwardly from one side edge. A rectangular sheet of paper with an adhesive on the back side of the other end is folded along the fold line, both ends are joined to form a ring-shaped overbody, and a filter element with an end plate on one of the upper and lower ends is made. An air cleaner in which the outer periphery of the filter element is placed close to or in contact with the inner peripheral wall of the case.