JPH08121271A - Air cleaner - Google Patents

Abstract

PURPOSE: To facilitate a layout of an air cleaner without reducing its sound absorption performance. CONSTITUTION: Between a main body 1, which is made of synthetic resin or iron plate and is provided with a rectangular box shape, and a cover body 2, a plate filter element E is arranged, and the main body 1 and the cover body 2, in which an outlet pipe 4 is installed from the side wall toward the outside, are connected together openably, while in the main body 1, an inlet pipe 3 with the predetermined length is inserted along the bottom wall in the longitudinal direction through the side wall, and then, its point end opening part 3a is opened on the lower side of the filter element E. In the inlet pipe 3, a projection part 3b projecting from the main body 1 toward the outside is shortened, so that a layout of an air cleaner in a narrow engine room is facilitated, and at the same time, intake noise is damped down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner which effectively attenuates engine intake noise and is suitable for use in a narrow space.

[0002]

2. Description of the Related Art As an air cleaner used in an engine, as shown in FIG. 5, a cover body C is attached to a rectangular body body B made of a synthetic resin such as polyamide or polypropylene or an iron plate so as to be openable and closable by a connecting member J such as a clip. While the body body B is provided with an inlet pipe B ₁ for taking in outside air, the cover body C is provided with an outlet pipe C ₁ for sending purified air to the engine, and a filter material such as filter paper or nonwoven fabric is processed between the two. A plate-shaped body provided with a rectangular filter element E having a packing material such as rubber or polyurethane attached to the periphery of one side thereof, or a body body B in the shape of a circular bowl as shown in FIG.
A shallow dish-shaped cover body C is detachably coupled to the upper part of the body with a center bolt k, and an inlet pipe B ₁ for taking in outside air is provided to the body body B toward the outside and the above-mentioned filter medium is provided inside. A filter in which a filter element E having a cylindrical shape is disposed is widely used.

[0003]

The air cleaner is regarded as a kind of sound absorber that attenuates intake noise in the intake system of an engine, and the cross-sectional area of the inlet pipe is made small and long in a range that does not deteriorate the performance of the engine. Although it is advantageous to make the length longer, it is difficult to set it in a complicated place with various devices such as the engine room of the vehicle if the length is unreasonably lengthened with the inlet pipe protruding outward. turn into. For this reason, some of the inlet pipes and outlet pipes are equipped with a sound absorbing box that is separate from the body to shorten the length of the pipe, but the box is almost the same size as the body. In terms of the layout of the air cleaner in a narrow space, it is not very advantageous and requires extra parts.

Therefore, an object of the present invention is to facilitate the layout of the air cleaner without using extra parts or reducing the sound absorbing performance.

[0005]

Based on the above object, the present invention provides an air cleaner for detachably supporting a filtration element by a body and a cover body, wherein the body has an inlet for taking in outside air of a predetermined length. The pipe is inserted from the side, and the tip opening is opened inside or outside the filtration element inside the body, while the part of the inlet pipe protruding outward from the body is inserted into the body. It is characterized by shortening as much as it is done.

[0006]

1 and 2 show an embodiment of the present invention, in which a rectangular body 1 and a cover 2 are made of synthetic resin such as polyamide or polypropylene or an iron plate as described above. Both of them are openably and closably connected by a hinge member 5 on one side, and fastened by a clip member 6 on the other side, and a filter medium such as a filter paper or a non-woven fabric is processed between them to form a plate shape. None A filtering element E provided with a packing material Ea such as rubber or polyurethane is arranged on the peripheral edge on one side thereof. In the illustrated example, however, the upper half of the side wall of the body 1 having the clip member 6 is opened outward so that the filtration element E can be taken in and out from the body in the used state.

An outlet pipe 4 made of the same material is provided in the central portion of one side wall of the cover body 2 so as to project outward from the side wall as usual.
In addition, an inlet pipe 3 having a predetermined diameter and a predetermined length, which is made of the same material as that of the main body 1, penetrates a side wall (a side wall opposite to the outlet pipe 4 in the figure) and extends along the bottom wall in the longitudinal direction of the body 1. The tip opening 3a is inserted into the body 1 below the filtration element E, and the portion 3b protruding outward from the body 1 is shortened by the amount inserted into the body 1. It is arranged and fixed to the bottom wall by means such as adhesion or welding.

In use, the outlet pipe 4 is normally connected to the intake pipe by a hose or the like, and the outside air taken in from the inlet pipe 3 by the operation of the engine enters the body 1 through the tip opening 3a and is filtered. It is purified by traversing the element E, exits into the cover body 2 and is sent to the engine from the outlet pipe 4.

In this case, since the inlet pipe 3 is inserted into the body 1 and the portion 3a protruding from the body 1 is made short as described above, the layout for use of the air cleaner is easy, and The air flow noise caused by the inflow of the outside air during use and the noise caused by the opening / closing of the intake valve can be attenuated without any change from the conventional air cleaner. Then, the inlet pipe 3 is extended to the extent that the ventilation resistance does not increase as shown by the dotted line in FIG.
If the distance t between the wall surface of the body 1 and the opposite wall surface of the body 1 is extended to a degree slightly larger than the diameter of the pipe or the diagonal line (in the case of a rectangular cross section), the inlet pipe becomes longer and the intake noise is reduced without deteriorating the engine performance. Will be attenuated more effectively.

FIGS. 3 and 4 show another embodiment, in which a circular bowl-shaped body main body 11 and a shallow dish-shaped cover body 12 made of a synthetic resin or an iron plate as described above are provided at the lower central outlet. The body 14 is detachably connected by a center bolt 16 standing upright from the pipe 14, and the above-mentioned filter medium E ₁ is formed in a cylindrical shape in the body body 11 and a perforated cylinder E ₂ is arranged inside and end plates are vertically arranged. Filtration element E with E ₃ attached
In the body body 11, an inlet pipe 13 having a predetermined cross-sectional area and a predetermined length, which are made of the same material, uses a part of the peripheral wall of the body body 11 and protrudes from the body body 11 b. Is inserted so as to be directed in a tangential direction, a tip opening 13a thereof is opened inside the body 11 outside the filtration element E, and a portion 13b protruding outward from the body 11 is inserted into the body 11. It is arranged so as to be shortened as much as it is.

In this case, the outlet pipe 14 is mounted on the intake pipe, and the outside air taken in from the inlet pipe 13 enters the body main body 11 through the tip opening 13a and swirls to flow the filter element E from the outside. Although it is traversed toward the inside, the air flow noise caused by the inflow of outside air and the noise caused by the opening and closing of the intake valve are attenuated by the body body 11, the cover body 12, and the inlet pipe 13. If the inlet pipe 13 is extended to the extent that the ventilation resistance is not increased as indicated by the dotted line in FIG. 4, the effect of reducing intake noise is improved.

The cross-sectional shape of the inlet pipe is not limited to that shown in the figure, and may be an elliptical shape, a trapezoidal shape or the like as long as the performance of the engine is not deteriorated. In the examples of FIGS. Alternatively, the bottom wall of the body body 1 may be used, and the inlet pipe 13 may be completely different from the body body 11 in the examples of FIGS.

[0013]

According to the present invention, a filter element is supported by a body and a cover so that it can be mounted, and an inlet pipe of a predetermined length is inserted into the body from the side as an air cleaner for treating the intake air of the engine. , The tip opening is opened in the body below or outside the filtration element, while the portion of the inlet pipe projecting outward from the body is shortened by the amount inserted into the body, so It is easy to install in a narrow engine room that is complicated by equipment, suitable for use in a narrow space, and the inlet pipe can be extended to the extent that it does not increase ventilation resistance in the body, such as a box body The intake noise can be effectively and appropriately damped without requiring extra parts.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view in the longitudinal direction.

3 is a cross-sectional view taken along line XX of FIG. 4 in another embodiment of the present invention.

FIG. 4 is a plan sectional view thereof.

FIG. 5 is a perspective view of an example of a conventional product.

FIG. 6 is a side view of another conventional product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body main body 2 Cover body 3 Inlet pipe 3a Tip opening 3b Portion protruding outward from body body 11 Body body 12 Cover body 13 Inlet pipe 13a Tip opening 13b Portion protruding outward from body body E Filtering element

Claims (1)

[Claims] 1. In an air cleaner in which a filter element is detachably supported by a body body and a cover body, an inlet pipe for intake of outside air of a predetermined length is laterally inserted into the body body, and a tip opening portion of the inlet pipe is inserted. While opening in the body below or outside the filtration element,
An air cleaner characterized in that the portion of the inlet pipe projecting outward from the body is shortened by the amount that the inlet pipe is inserted into the body.