JPH046817Y2 - - 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. 4, a conventional air cleaner for an internal combustion engine includes a casing 3 having an inlet and an outlet 1 and an outlet 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. Further, the interval between the folds of the filter element 4 also has the disadvantage that as the folds progress, they come into close contact with each other.

[Means for solving problems]

A housing consisting of a case provided with an inflow/outlet has folds of pleats at predetermined intervals, every other fold has a chevron-shaped fold extending upwardly from one side edge, and the other fold has a chevron-shaped fold extending upwardly from one side edge, and the other fold has a chevron-shaped fold extending upwardly from one side edge. A rectangular sheet-like filter paper with a chevron-shaped fold extending downward from one end and an adhesive section on the other end is pleated along the fold, and both ends are joined to form an annular filter body, and the bottom end of the rectangular sheet filter paper is folded along the fold. A filter element having an end plate is disposed at the bottom, and the outer periphery of the filter element is close to or in contact with the inner circumferential 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. Between each fold of the filter element,
Even if the clogging progresses to some extent, the filter walls at the upper and lower ends formed by the chevron-shaped folds will maintain the predetermined spacing.

〔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 disk-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 base 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.
The folds have folds 21 at predetermined intervals, and every other fold has a chevron-shaped fold 22 extending upward from one side edge, and the other fold has a chevron-shaped fold extending downward from the other side edge. A rectangular sheet-like paper 25 having an adhesive portion 22a and an adhesive portion 24 only at the other end is pleated along the folds 21, 22, and 22a, and is placed around the porous inner cylinder 26. Both ends are joined to form an annular overbody, and a thin donut-shaped end plate 27 is fixed to the lower end of the annular body through an adhesive. This filter element 14 (the thin plate 27 is omitted) is open at the other end between the folds 28, 28, closed at the one end, and closed at the both ends. The pleats 28, 28 are separated by chevron-shaped walls 29 formed by the chevron-shaped folds 22 (FIG. 3).

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. As shown in FIG. 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. Between each fold 28, 28 of the filter element is a wall 29 provided at the upper and lower ends.
29a, they are maintained at a predetermined interval.

〔effect〕

The present invention provides a filter element in which the folds at both ends are separated by a chevron-shaped wall, the folds at the other end are opened and closed, and an end plate is provided at either end, and an inlet is provided. The outer periphery of the filter element is arranged so as to be close to or in contact with the inner peripheral walls of the upper and lower cases, and one end of the filter element is
Since the intake air is placed on the inlet side, the intake air flows in between the widely separated folds and flows out to the inner circumferential surface of the filter element, and the annular chamber for introducing the intake air is placed between the filter element and the inner circumferential wall of the case. As a result, it is possible to reduce the size without increasing the flow resistance. Moreover, each pleat does not come into close contact with each other, and the effective overarea cannot be reduced.

[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 plan view of a sheet of paper, FIG. 3 is a perspective view of a filter element without an end plate, and FIG. 4 is a sectional view of a conventional air cleaner. 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 inflow/outlet has folds of pleats at predetermined intervals, every other fold has a chevron-shaped fold extending upwardly from one side edge, and the other fold has a chevron-shaped fold extending upwardly from one side edge, and the other fold has a chevron-shaped fold extending upwardly from one side edge. A rectangular sheet-like filter paper with a chevron-shaped fold extending downward from one end and an adhesive section on the other end is pleated along the fold, and both ends are joined to form an annular filter body, and the bottom end of the rectangular sheet filter paper is folded along the fold. An air cleaner in which a filter element with an end plate is disposed at the bottom, and the outer periphery of the filter element is placed close to or in contact with the inner peripheral wall of the case.