JPH0323293Y2 - - Google Patents

Description

[Detailed explanation of the invention] ≪Industrial application field≫ This invention is applicable to air cleaners for automobile engines,
This invention relates to improvements in filter paper type filter elements used in filtration devices such as oil filters and fuel filters.

≪Prior Art≫ In general, engines installed in vehicles such as automobiles are equipped with air cleaners that filter intake air, etc.
Filtering devices such as oil filters are used to filter oil supplied to lubricated parts of engines.

Filter elements are housed in these filter devices, and these filter elements perform a substantial filtering function.

By the way, as a conventional filter element 1, a so-called chrysanthemum-shaped element is often used, which is a ring-shaped filter paper 2 that is bent into a bellows shape, as shown in FIG.

However, such conventional filter element 1
was composed of one continuous chrysanthemum-like element. For this reason, filter element 1
Since the number of bellows-like folds on the inner periphery and the number of ridges on the outer periphery are the same, the pitch P2 on the outer periphery is larger than the pitch P1 on the inner periphery. If the difference between the inner and outer diameters is increased, the pitch difference between the inner and outer circumferences will further increase, and more space will be wasted on the outer circumference. Therefore, the effect of increasing the difference between the inner and outer diameters of the filter element 1 is not sufficiently exhibited, resulting in a problem that the filtration effect is reduced and the device is forced to be larger.

Therefore, in Japanese Patent Application Laid-Open No. 61-15713, the present applicant
By arranging multiple stages of chrysanthemum-shaped elements concentrically, the difference in the inner and outer diameters of each chrysanthemum-shaped element is reduced, thereby reducing the difference in pitch between the inner and outer circumferences of the mountain folds, and significantly reducing wasted space. We proposed a filter element with

However, the filter element disclosed in the same publication also had the following problems.

<<Problems to be solved by the invention>> That is, in the filter element of the above-mentioned publication, a filter paper group consisting of two concentrically divided groups, an inner filter paper group and an inner filter paper group, is provided, and the fluid filtered by the outer filter paper group and the inner filter paper group are separated. A partition wall was provided to separate the unfiltered fluid introduced into the filter paper at the boundary between the filter paper groups.

This has resulted in drawbacks such as an increase in the number of parts and complicated assembly.

This invention was made in view of these problems, and its purpose is to provide a filter element that can increase the filtration area without increasing the number of parts or complicating assembly. It's about doing.

≪Means for solving the problems≫ In order to achieve the above object, the present invention provides a method in which a large number of rectangular filter papers that are continuous through folded edges are
A filter element that is installed upright between two parallel end plates, and the space occupied by these filter papers has a hollow cylindrical shape as a whole, and the arrangement pattern of the filter papers satisfies the following configurations (a) to (d). filter element.

(b)...A plurality of filter paper groups consisting of substantially the same pattern that are rotationally symmetrical or linearly symmetrical with respect to the radius line of the hollow cylinder are continuous, and each filter paper group is arranged in at least two inner and outer sections that concentrically divide the hollow cylinder. It consists of a group of surrounding filter papers.

(b)...The inner and outer peripheral filter paper groups are connected by a connecting piece located on the concentric circle of the hollow cylinder,
Inlet passages for introducing fluid into the inner filter paper group and outlet passages for leading out fluid filtered by the outer filter paper group are alternately provided on a radial line.

(c)...One of the inner and outer peripheral filter paper groups is bent into a chrysanthemum shape.

(d)...The other of the above-mentioned inner and outer circumferential filter paper groups has outer circumferential folding ridge lines arranged at approximately equal pitches along the outer circumferential circle or the above-mentioned connection piece, and the inner circumferential side folding ridge line is arranged along the inner circumferential circle or the above-mentioned connection piece. It consists of equal-length parts arranged at approximately equal pitches along the piece, and parts arranged so as to become shorter sequentially from the end of the equal-length parts along the radial line toward the outer circumferential side.

<<Operation>> According to the filter element having the above configuration, an inlet passage for introducing fluid into the inner filter paper group and an outlet passage for fluid filtered by the outer circumference filter paper group can be formed by simply bending the filter paper.

<<Example>> Hereinafter, preferred embodiments of this invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of a filter element according to this invention.

The filter element shown in the figure has bent ridge lines 10a, 10b, 10c, 10d, . . . on the inner and outer peripheral sides.
A large number of rectangular filter papers 12 are continuous through the
12, . . . are vertically densely arranged vertically between two parallel disk-shaped end plates (not shown), and the space occupied by these filter papers 12, 12, . It's taking shape.

The arrangement pattern of the filter paper 12 in this embodiment is set by dividing the hollow cylinder 14 into eight equal parts 14a to 14g at 45 degrees on an imaginary plane in the radial direction.

The filter paper arrangement in each partial region 14a to 14g is a rotationally symmetrical pattern by only changing the angle by 45 degrees, and each pitch between the bending ridge lines 10a, 10b, 10c, and 10d is approximately They are the same length.

The filter papers 12, 12, . . . are composed of an inner filter paper group 16 and an outer filter paper group 18 that concentrically divide the hollow cylinder 14. It is approximately 1/3 the size and is bent in the shape of a chrysanthemum. Between the inner and outer peripheral filter paper groups 16 and 18, hollow cylinders 14 are formed in the partial regions 14a to 14g, respectively.
Arc-shaped connection pieces 22, 2 located on the concentric circle of
2,... are connected. The inner filter paper group 16 is bent into a chrysanthemum shape as in the conventional case. The outer filter paper group 18 is composed of nine sheets, in which the folded ridge lines 10a on the outer circumferential side are arranged at approximately equal pitches along the outer circumferential circle 20, and the folded ridge lines 10b on the inner circumferential side are arranged along the connecting pieces 22. It consists of an equal length section made of the filter paper 12, and a section where the width becomes gradually narrower in which the bent ridge line 10b on the inner circumferential side from the end of the equal length section is sequentially arranged toward the outer circumferential circle 20 along the radius line. There is.

Then, the peripheral filter paper groups 18, 1 adjacent to each other in the circumferential direction
8, inlet passages 24, 24 are formed on the radius line of the hollow cylinder 14 at a ratio of one out of every two inlet passages 24, 24 for introducing the fluid before being filtered into the inner peripheral filter paper groups 16, 16, respectively.

In addition, inner filter paper groups 16, 16 adjacent in the circumferential direction
Similarly, one hollow cylinder 14 is placed between every two cylinders.
Exit passages 26, 26 are formed on the radial line of the outer filter paper group 18, 26 for leading out the fluid filtered by the outer peripheral filter paper groups 18, 18.

The inlet passage 24 and the outlet passage 26 are located on different radii of the hollow cylinder 14, and the inlet passage 24 and the outlet passage 26 are alternately formed on the radial line in the circumferential direction.

In the filter element configured as described above, for example, fluid introduced to the outer circumference of the element is filtered by passing through the outer filter paper group 18, and then passes through the outlet passage 26 to the inner circumference of the element. At the same time, it passes through the inlet passage 24 and the inner filter paper group 16 to be filtered, and then reaches the inner periphery of the element.

In the filter element of this embodiment, the width of the inner filter paper group 16 bent in the shape of a chrysanthemum is narrower than that of the outer filter paper group 18, so there is almost no difference in pitch between the inner and outer circumferences, so there is no waste. Space is getting smaller.

In addition, when the outer filter paper group 18 is folded into a chrysanthemum shape and compressed on one side so that the inner and outer circumferences are evenly pitched, the approximately triangular space that is created on the other side is
The inner circumferential bending ridge line 10b along the radius line is the outer circumferential circle 2.
Since the filter is filled with parts arranged on the 0 side whose widths become shorter in sequence, the filtration area increases by an amount corresponding to this part.

Furthermore, an inlet passage 24 that introduces fluid before filtration to the outside of the inner filter paper group 16 and an outlet passage 26 that leads out the fluid filtered by the outer filter paper group 18 are connected to a connection piece that connects the filter paper groups 16 and 18. 22 are formed alternately on a radial line, and since these passages 24 and 26 are formed only by folding the filter paper, there is no need for partitions as in conventional filter elements of this type.

Figure 2 shows a second embodiment of this invention.
Only the characteristic points will be explained below.

In this embodiment, the inner and outer filter paper groups 16, 1 in FIG.
8 with the radial positional relationship reversed, and the outer peripheral filter paper group 18 is bent into a chrysanthemum shape.

Figure 3 shows a third embodiment of this invention.
In this embodiment, the entire length of the outer filter paper group 18 of the first embodiment is shortened, and the outer circumferential edge of the outer filter paper group 18 is shortened.
6 The hollow cylinder 14 is concentrically divided into three parts by replacing it with a group of outer filter papers 16' bent in the same chrysanthemum shape.

FIG. 4 shows a fourth embodiment of this invention.
In this embodiment, the hollow cylinder 14 is similar to the first embodiment.
The filter paper group 16 is concentrically divided into two groups, the inner filter paper group 16 is bent in a chrysanthemum shape, and the outer filter paper group 18 is composed of equal length sections and sections whose width gradually becomes narrower. The outer filter paper group 18 is bent not rotationally symmetrically but line symmetrically with respect to the radius line of the hollow cylinder 14.

Even with this configuration, the same effects as in the first embodiment can be obtained.

5 and 6 show the fifth to sixth embodiments of this invention, respectively, and FIG. 5 shows the fourth embodiment of the invention.
The radial positional relationship of the inner and outer peripheral filter paper groups 16 and 18 of the embodiment is reversed, and FIG.
An outer peripheral filter paper group 16' in which the outer peripheral edge of the outer peripheral filter paper group 18 of the embodiment is bent into the same chrysanthemum shape as the inner peripheral filter paper group 16.
This is an example in which the hollow cylinder 14 is concentrically divided into three groups.

Even when configured as shown in FIGS. 5 and 6, the same effects as in the first embodiment can be obtained.

In the above embodiment, the hollow cylinder 14 is divided into eight parts in the circumferential direction, but the implementation of this invention is not limited to this, and other numbers of divisions may be used.

<<Effects of the invention>> As explained above in detail in the examples, the filter element according to the invention has an excellent effect in that the filtration area can be increased by folding the filter paper without using any other members. Effects can be obtained.

[Brief explanation of drawings]

1 to 6 are explanatory diagrams respectively showing first to sixth embodiments of the filter element according to this invention. 10a to 10d... bending ridge line, 12... filter paper,
14...Hollow cylinder, 14a to 14g...Partial area, 16...Inner circumference filter paper group, 18...Outer circumference filter paper group,
20... Outer circumferential circle, 22... Connection piece, 24... Inlet passage, 26... Outlet passage.

Claims (1)

[Claims for Utility Model Registration] A large number of rectangular filter papers that are continuous through folding ridges are erected between two parallel end plates, and the space occupied by these filter papers forms a hollow cylindrical shape as a whole. A filter element that has a filter paper arrangement pattern that satisfies the following configurations (a) to (d). (b)...A plurality of filter paper groups consisting of substantially the same pattern that are rotationally symmetrical or linearly symmetrical with respect to the radius line of the hollow cylinder are continuous, and each filter paper group is arranged in at least two inner and outer sections that concentrically divide the hollow cylinder. It consists of a group of surrounding filter papers. (b)...The inner and outer peripheral filter paper groups are connected by a connecting piece located on the concentric circle of the hollow cylinder,
Inlet passages for introducing fluid into the inner filter paper group and outlet passages for leading out fluid filtered by the outer filter paper group are alternately provided on a radial line. (c) One of the inner and outer peripheral filter paper groups is bent into a chrysanthemum shape. (d)...The other of the above-mentioned inner and outer circumferential filter paper groups has outer circumferential folding ridge lines arranged at approximately equal pitches along the outer circumferential circle or the above-mentioned connection piece, and the inner circumferential side folding ridge line is arranged along the inner circumferential circle or the above-mentioned connection piece. It consists of equal-length parts arranged at approximately equal pitches along the piece, and parts arranged so as to become shorter sequentially from the end of the equal-length parts along the radial line toward the outer circumferential side.