JPH061219Y2 - Air cleaner - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air cleaner, and more specifically,
The present invention relates to an improvement of an air cleaner in which an element having a chrysanthemum-shaped filter portion is arranged inside a hollow housing having an inlet and an outlet.

[Conventional technology]

FIG. 2 shows a horizontal sectional view of a conventional air cleaner. This air cleaner has an element 1 inside the housing 200.
00 is provided.

The housing 200 forms an element chamber 201, and has a circular cross-section case 2 having an outlet 203 in the center of the bottom surface.
00a, which projects from the side surface of the case 200a, forms an inlet 202 at one end and the element chamber 201 at the other end.
Inlet pipe 200b forming an opening 204 to
And a cap (not shown) that covers the case 200a.

The element 100 includes a cylindrical core portion 101 having a porous structure.
And a chrysanthemum-shaped filter portion 102, which is provided on the outer peripheral surface of the core portion 101 and is formed by processing a belt-shaped filter material into approximately equal fold-fold densities so that the outer peripheral edge and the inner peripheral edge are alternately peaks and valleys. ,
An upper end plate (not shown) fixed to the upper end of the filtering unit 102
And a lower end 103 fixed to the lower end of the filter 102,
Consists of.

The element 100 is housed in the element chamber 201 of the housing 200, and the air introduced from the inlet 202 is filtered by the filter 102 in the element chamber 201 and is led out from the outlet 203 through the perforations of the core 101.

[Problems to be solved by the device]

However, in the above conventional air cleaner, the element 10
Since the filter material of the filter section 102 at 0 is pleated at a substantially equal density, the filter area of the filter section 102 per unit outer peripheral area of the element 100 is equal on any outer peripheral surface. In general, the introduced air is likely to be drawn out from the inlet 202 to the outlet 203 through the shortest path. Therefore, in this air cleaner, the opening 20 in the filtering portion 102 of the element 100 is
4 is a filtering unit 102a close to 4 and a filtering unit 1 is far from the opening 204.
02b causes a difference in the amount of air passing through per unit outer peripheral surface area, and a larger amount of air flows in the filtering portion 102a near the opening 204 than in other portions, so that the amount of filtered air increases. Therefore, the filter 102a is apt to be clogged with dust or the like in the air.

The present invention has been made in view of such a problem, and an object thereof is to provide an air cleaner in which the local clogging of the filter portion of the element is unlikely to occur.

[Means for Solving the Problems]

The air cleaner of the present invention comprises a housing having an outlet opening on the bottom surface of the element chamber and an inlet opening on the side surface of the element chamber, a cylindrical core portion housed in the element chamber, and a porous core portion. A chrysanthemum-shaped filter part, which is provided on the outer peripheral surface and is formed by fold-folding a band-shaped filter material so that the outer peripheral edge and the inner peripheral edge are alternately peaks and valleys, and an upper end plate fixed to the upper end of the filter part. And a lower end plate fixed to the lower end of the filter section, and an element for filtering the air introduced from the inlet by the filter section and leading it to the outlet through the pores of the core section. In the air cleaner, the fold folding density of a portion of the element located on the shortest path from the inlet to the outlet of the filtering portion is lower than that of the other portion of the filtering portion. It is characterized in that large.

[Operation] Also in the air cleaner of the present invention, dust such as dust in the air introduced from the inlet is filtered by the filter portion of the element,
It is led out from the outlet through the porosity of the core. At this time, air is likely to be drawn out through the shortest path from the inlet to the outlet.

Here, in this air cleaner, the fold folding density of the portion of the element located on the shortest passage of the filtering portion is made higher than the fold folding density of the other portions. The densely crimped part of the filtration part (hereinafter referred to as the dense part) is
The filtration area per unit outer peripheral area (per unit central angle) as an element is larger than the other portion (hereinafter referred to as a rough portion) of the dense portion of the filtration portion. Therefore, with this air cleaner, the air can be filtered with a filtering area corresponding to the amount of air passing through the unit outer peripheral area, and local clogging of the filtering section is unlikely to occur.

The core retains the shape of the filter, and allows filtered air to pass through many holes of the core itself.
In addition, each end retains the shape of the filter.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a horizontal sectional view of the air cleaner of this embodiment,
The element 1 is housed in the housing 2.

The housing 2 is used for an ordinary automobile air cleaner, and includes an element chamber 21, an inlet 22 for introducing air into the element chamber 21, and an outlet for introducing air from the element chamber 21 to an engine (not shown). 23 and. The housing 2 forms an element chamber 21 and has a circular cross-section case 2a having an outlet 23 at the center of the bottom surface and a case 2a protruding from the side surface of the case 2a. One end forms an inlet 22 and the other end opens into the element chamber 21. Inlet pipe 2b forming 24
And a cap (not shown) that covers the case 2a.

The element 1 is provided on the outer peripheral surface of the porous cylindrical core portion 11 and the core portion 11, and the band-shaped filter medium is pleated so that the outer peripheral edge and the inner peripheral edge are alternately peaks and valleys. The filter part 12 has a chrysanthemum shape, an upper end plate (not shown) fixed to the upper end of the filter part 12, and a lower end plate 13 fixed to the lower end of the filter part 12. The filter portion 12 of the element 1 has a shape in which a part (hereinafter referred to as a dense part 12a) is more densely fold-folded than the other part (hereinafter referred to as a rough part 12b) and has a different fold density. This element 1
Was manufactured as follows. First, an ordinary band-shaped filter medium is pleated at the same pitch, and it is deformed into a ring shape while abutting against a cylindrical core portion 11 having a porous structure, and both ends of the filter medium are bonded to form a filter portion 12. . Then, about 1/4 of the entire circumference of the filter section 12 was provided with peak-to-peak (valley-to-valley) intervals, and the upper end plate and the lower end plate 13 were fixed to the upper end and the lower end, respectively, in this state. In this way, the element 1 having the filter portion 12 having the shape with different fold density was manufactured. A part of the narrow filter part 12 having a space between the mountains (valleys and valleys) is a dense part 12a, and the other part is a rough part 12b.

The element 1 has a case 2a of the housing 2 so that the dense portion 12a faces the opening 24 of the inlet pipe 2b.
It is installed coaxially inside. This element 1
The lower end plate 13 abuts on the bottom surface of the case 2a via packing (not shown), and the upper end plate abuts on the cap via packing (not shown), and a bolt is provided between the case 2a and the cap. It is used in a state of being sandwiched by using the like (not shown).

The air cleaner of this embodiment has the above-mentioned structure. Next, the operation of this air cleaner will be described.

The air introduced from the inlet 22 of the inlet pipe 2b due to the negative pressure of the intake air of the engine reaches the element chamber 21 through the opening 24. Since the dense portion 12a of the element 1 housed in the element chamber 21 has a larger filtration area per unit arcuate length in the circumferential direction than the rough portion 12b, it depends on the amount of air flowing from the opening 24 to the outlet 23. Filter by filtration area. In this way, the filtered air is guided to the engine from the outlet 23.

Therefore, in the air cleaner of this embodiment, the filter portion 12 of the element 1 is not locally clogged.

In the present embodiment, the filtering part of the element is composed of the dense part and the rough part, each having a constant density, but the density may be continuously changed from the high density part to the low density part.

Further, in the present embodiment, the element in the case where the inlet of the housing is open toward one position on the side surface of the housing has been described. However, if the inlet of the housing is open at two locations on the side surface, for example, the dense portion of the filter portion of the element may be provided at two locations so as to match the inlet.

[Effect of device]

In the air cleaner of the present invention, the fold folding density of the portion of the element located on the shortest path of the filtration portion is made higher than the fold folding density of the other portions, so that local clogging of the filtration portion is less likely to occur. .

Therefore, it is possible to avoid a rapid increase in filtration resistance in the initial stage.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of an air cleaner according to an embodiment of the present invention, and FIG. 2 is a horizontal sectional view of a conventional air cleaner. DESCRIPTION OF SYMBOLS 1 ... Element 11 ... Core part 12 ... Filtration part 12a ... Dense part 12b ... Rough part 13 ... Lower end plate 2 ... Housing 21 ... Element chamber 22 ... Inlet 23 ... Outlet

Claims (1)

[Scope of utility model registration request] 1. A housing having an outlet opening on the bottom surface of the element chamber and an inlet opening on the side surface of the element chamber, a cylindrical core portion housed in the element chamber and having a perforation, and an outer periphery of the core portion. A chrysanthemum-shaped filter part, which is provided on the surface, and is formed by fold-folding a band-shaped filter material so that the outer peripheral edge and the inner peripheral edge are alternately peaks and valleys, and an upper end plate fixed to the upper end of the filter part. An air cleaner comprising: a lower end plate fixed to the lower end of the filter section; and an element for filtering the air introduced from the inlet by the filter section and discharging the air through the perforations of the core section to the outlet. In the element, the fold folding density of a portion of the filtering portion located on the shortest passage from the inlet to the outlet is higher than the fold folding density of the other portion of the filtering portion. Air cleaner, characterized.