JPS6229048Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air cleaner element used in internal combustion engine mounted vehicles such as automobiles and motorcycles.

Conventionally, air cleaner elements include filter paper types that filter intake air only using filter paper,
There are oil bath types that collect oil in a tank and remove dust by bringing air into contact with the oil surface. The former filter paper type is widely used due to its simple structure, while the latter oil bath type is effective when used in pond areas where there is a lot of sand and other relatively high-density dust. but,
Oil bath type air cleaners have problems such as oil leakage in the tank if the air cleaner is tilted and poor purification ability. Therefore, for example,
As shown in No. 57-120749, an air cleaner that uses urethane as an element and impregnates it with oil so as to have both filter paper type and oil bath type functions has been filed.

However, although urethane is easily considered as a filter medium to be impregnated with oil in this way, this urethane has poor oil leaching properties and has a reduced ability to retain dust attached to the urethane. In other words, the oil exuded from the filter medium permeates the dust collected by the filter medium and is adhered to and retained by the filter medium, thereby serving as an oil bath type air cleaner.
Therefore, if the ability to retain dust is reduced, the dust removal efficiency of the air cleaner will be deteriorated.

SUMMARY OF THE INVENTION In view of the conventional situation, it is an object of the present invention to provide an air cleaner element that has good dust adhesion retention properties and high dust removal efficiency.

To achieve this objective, the present invention comprises a cylindrical first element in which a relatively coarse nonwoven fabric is wound in a spiral shape in multiple layers as a filter material and this nonwoven fabric is impregnated with oil, a cylindrical second element made of a relatively dense filter material and placed inside the first element, and a space is provided between these elements.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows an embodiment of an air cleaner 2 using the element 1 of the present invention. The element 1 is housed in a cleaner case 5 composed of a bottomed cylindrical body 3 and a cover 4. It is becoming more and more common. This element 1 includes a first element 1a and a second element 1b as shown in FIG.
and an annular space 1c provided between these elements 1a and 1b, and the first element 1a has an inner cylinder 6 and an outer cylinder 7 formed of perforated plates.
A relatively coarse nonwoven fabric 8 serving as a filter medium is wound in multiple layers in a spiral shape, and is housed in a compressed state between the filter medium and the filter medium. Preferably, by using a combination of two or more layers of nonwoven fabrics with different densities so that the density of the nonwoven fabric 8 is different on the inside and outside, for example, a slightly denser nonwoven fabric is wound in multiple layers on the inside, and a coarser nonwoven fabric is used. The filter medium of the first element 1a is formed by winding the material in multiple layers on the outside, or by reversing the density difference between the inside and outside.

Further, the element 1b uses urethane 9 having open cells as a filtering medium, and is housed in an inner cylinder 10 and an outer cylinder 11 of a perforated plate similarly to the first element 1a. Note that this second element 1b
is not impregnated with oil.

In the element 1 constructed in this manner, the cover 4 of the cleaner case 5 is removed, the second element 1b is housed in the body 3, and the bolt 13 fixed to the cleaner case 5 is attached to the bolt 13 via the bracket 12. While fixing the second element 1b via the wing nut 14,
The first element 1a is arranged on the outer periphery of the element 1b.
This first element 1a is similarly fixed to the bolt 13 using the wing nut 14a. At this time, an appropriate distance is provided between the first element 1a and the inner periphery of the body 3. After the element 1 is housed and fixed in this way, the cover 4 is tightened and fixed to the bolt 13 with the wing nut 14b, and the cleaner case 5 is inserted through the air intake port 15 formed on the side surface of the body 3.
The outside air introduced inside the body 3 and element 1
circulating around the outer periphery of the element 1,
It passes through the outer cylinder 7, nonwoven fabric 8, and inner cylinder 6 of the first element 1a to reach the inside of the element 1, and further passes through the outer cylinder 11, urethane 9, and inner cylinder 10 of the second element 1b, and then passes through the second element 1b. The air is then supplied to the internal combustion engine (not shown) through an air outlet 16 formed at the bottom of the body 3.

Therefore, when the air supplied to the internal combustion engine passes through the element 1, dust is removed and purified air is provided. In the figure, 17 is a cyclone in which the air introduced into the body 3 from the air intake port 13 is swirled between the body 3 and the element 1. A comparison is made using the swirling flow generated by this cyclone 17. Larger dust and moisture are separated and removed before passing through the element 1. 18 is a drain hole for discharging moisture, dust, etc. separated by the cyclone 17 to the outside.

The element 1 consisting of the first element 1a and the second element 1b used in the air cleaner 2 of this embodiment with the above configuration uses the nonwoven fabric 8 as a filter medium in the first element 1a, and the nonwoven fabric 8
Since the nonwoven fabric 8 is impregnated with oil, adhesion and retention of dust filtered by the nonwoven fabric 8 are improved. That is, since the nonwoven fabric 8 is formed with intricate fibers, it retains a large amount of oil, and the oil has good mobility (oozeability) through the fibers due to capillary action. Even if the dust adheres to the surface, oil oozes out and soaks the entire surface of this dust, and furthermore, other dust easily adheres to this dust. The oil then penetrates into other dust in the same way, and the dust accumulates one after another, so
Not only does it greatly improve the adhesion of dust, but also the ability to retain the adhering dust is greatly improved as the oil that is held in abundance is gradually oozed out. This significantly improves air purification efficiency, and is particularly effective when used in areas where there is a lot of relatively dense dust (this dust is also relatively coarse particles). In addition, since the nonwoven fabric 8 is wound in a spiral, oil is also retained on the joint surfaces of each layer, and the amount of oil impregnated can be significantly increased, which further improves the purification efficiency. It also leads to improvement.

Furthermore, in the present invention, a second element 1b using urethane 9, which is denser than the nonwoven fabric 8, as a filter material is provided inside the first element 1a, so that fine dust can be removed by this second element 1b. Therefore, the first element 1a can be used exclusively for removing coarse dust, and it is possible to prevent clogging of the first element 1a and significantly extend the element replacement period. By providing the second elements 1a and 1b, it is possible to significantly improve the purification ability. Moreover, when a density difference is provided between the inside and outside of the nonwoven fabric 8, the above-mentioned effect becomes even more remarkable. Furthermore, in the element 1 of the present invention, the space 1c is provided between the first element 1a and the second element 1b, so that the oil impregnated in the first element 1a is prevented by the passage of air or capillary action. Since migration to the second element 1b side can be prevented, the above-mentioned adhesion and retention of dust due to oil exudation can be effectively achieved.

As explained above, in the air cleaner element of the present invention, since nonwoven fabric is used as the filter medium impregnated with oil in the first element, adhesion and retention of filtered dust are significantly increased, and air Purification efficiency can be improved. Furthermore, since the nonwoven fabric is wound in multiple layers in a spiral shape, the amount of oil retained at the joint surfaces of each layer is increased, and purification efficiency can be further improved. Furthermore, since the relatively dense second element is arranged within the first element, it is possible to remove fine dust, and the second element is relatively dense.
The element can be used exclusively for coarse dust, and various excellent effects can be achieved, such as extending the life and improving the purification ability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of an air cleaner using the element of the present invention, and FIG. 2 is a cross-sectional view showing an embodiment of the element of the present invention. 1...element, 1a...first element,
1b...Second element, 2...Air cleaner,
5...Cleaner case, 8...Nonwoven fabric, 9...
Urethane, 15...Air intake port, 16...Air exhaust port.

Claims (1)

[Scope of utility model registration request] A relatively coarse non-woven fabric is spirally wound into multiple layers.
A cylindrical first element made of this nonwoven fabric impregnated with oil, a cylindrical second element using a relatively dense filter medium disposed inside this first element,
An air cleaner element characterized in that a space is provided between the first and second elements.