JP2589431Y2 - Air cleaner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner with reduced radiation noise.

[0002]

2. Description of the Related Art Conventionally, radiation noise is generated from an air cleaner, and the radiation noise is generated because the pressure pulsation in the air cleaner due to intake air becomes an exciting force and the air cleaner body is excited. Conventionally, in order to reduce the radiation noise, the surface rigidity of the air cleaner main body is increased so that the structure is not excited by pressure pulsation.In order to increase the surface rigidity of the air cleaner main body,
The thickness of the air cleaner body is increased, ribs are added, and rigid materials are used to form the air cleaner.If the thickness of the air cleaner body is increased, the weight increases. Also, if the ribs are provided on the inner surface of the air cleaner body, the performance of the air cleaner deteriorates, and if the ribs are provided on the outer surface of the air cleaner body, there is a problem that the appearance deteriorates, and the air cleaner body is made of a rigid material. If the ribs are formed, there is a problem that the material cost is increased, and there is a limit in increasing the thickness of the plate, and even when the ribs are provided, the height of the ribs and the distance between the ribs are limited. Therefore, it was extremely difficult to completely eliminate the radiated sound.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an inexpensive air cleaner capable of reducing radiated sound as much as possible. , The element is installed and the top is open
A cover is attached on the upper surface of the bottomed body
L at the downstream corner of the element in the cover.
A resonance tube having a V shape is provided integrally, and the resonance tube has a bottom surface.
Formed on an inclined surface with an inclined side, between the upper surface of the cover
And the end of the resonance tube
An opening that opens to the main body side is formed, and the opening
The end is closed and the length of the resonance tube is
Quarter wavelength of the frequency of pressure pulsation generated in the cleaner
It is set to the length corresponding to the length of the minute .

[0004]

A resonance pipe is provided integrally downstream of the element in the cover of the air cleaner, and the resonance pipe can favorably suppress the pressure pulsation, so that the radiation noise of the air cleaner can be reduced satisfactorily.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the air cleaner of the first embodiment. A duct 3 for sucking outside air is provided at the tip of a bottomed main body 2 of the air cleaner 1 having an open upper surface.
And a mounting portion 2a for mounting a throttle chamber is formed on the lower surface of the main body 2. Further, a cover 5 is attached to the upper surface of the main body 2 in the form of a cover. In this example, the resonance tube 6 is integrally provided in the cover 5.

FIG. 2 is an internal structural view of the cover 5 as viewed from the lower surface side. An L-shaped resonance tube 6 is integrally formed inside an outer circumferential flange 5a formed on the outer circumference of the cover 5. As shown in FIG. 3 as a sectional view taken along line AA in FIG. 2, the resonance tube 6 is formed on an inclined surface 6 a having an inclined bottom surface, and a curved portion 5 c at a corner of the cover 5. The upper surface 5b of the cover 5 is fixedly provided inside the
And a silence path R is formed between them.

The inclined surface 6a of the resonance tube 6 is formed in an inclined shape so as not to reduce the performance of the air cleaner 1. Further, since the resonance tube 6 is provided at a corner portion in the cover 5 of the air cleaner 1, it does not hinder the performance of the air cleaner, and can be attached later inside the cover 5 and can be manufactured. Easy.

In FIG. 2, an opening 6b is formed at one end of the resonance tube 6 so as to open downward, that is, toward the main body 2, and an end opposite to the opening 6b is closed. 6c. The length 1 of the resonance tube 6 is ４ of the frequency of the pressure pulsation generated in the air cleaner 1.
The length is set to correspond to the length of the wavelength. In addition,
The larger the cross-sectional area of the silencing path R, the higher the silencing effect. Also, the cross-sectional shape can be formed in a circular shape.

As described above, since the resonance pipe 6 is integrally provided in the cover 5, the pressure pulsation generated in the air cleaner 1 is favorably attenuated in the muffling path R in the resonance pipe 6, so that the air cleaner 1 is reduced, and radiation noise emitted from the air cleaner is also reduced. Since the pressure pulsation generated in the air cleaner 1 is caused by resonance of a pipe on the downstream side of the air cleaner 1, the installation position of the resonance pipe 6 is in the clean side C on the downstream side of the element 4 in the air cleaner 1. It is effective. Conventionally, there is a structure in which a muffler is provided in a pipe on the downstream side of the air cleaner 1 to suppress pressure pulsation, but this is to set a muffler in a portion where resonance occurs. On the other hand, in the present embodiment, the resonance tube 6 is provided inside the air cleaner 1 to suppress the vibration source.

Next, FIG. 4 shows a second embodiment. In FIG. 4, a resonance tube 6 is provided integrally within a main body 2 of an air cleaner, and FIG. The plan view which was removed is shown. An L-shaped resonance tube 6 is provided along the corner portion inside an outer circumferential flange 2b formed on the outer periphery of the main body 2, and an opening 6b opened upward at one end of the resonance tube 6 is provided. Is formed, and an end opposite to the opening 6b is a closed opening 6c. In this embodiment, a resonance tube 6 is provided along a corner on the upper surface side of the throttle chamber mounting portion 2a of the main body 2.

FIG. 6 shows a third embodiment, and FIG. 7 is a plan view of the main body 2 as viewed from the top. In the present embodiment, an L-shaped resonance tube 6 is integrally mounted on the outer periphery of the throttle chamber mounting portion 2a on the lower surface of the main body 2 of the air cleaner 1, and an opening 6b of the resonance tube 6 is formed.
Is open in the main body 2. Thus, even if the resonance pipe 6 is provided outside the main body 2, the pressure pulsation can be reduced favorably by the muffling path R in the resonance pipe 6.

Next, FIG. 8 shows a fourth embodiment. In this embodiment, a resonance tube 6 is integrally provided outside a cover 5 of an air cleaner 1. The resonance tube 6 is provided in an L-shape along the line, and the opening 6 b of the resonance tube 6 is opened in the cover 5. FIG. 9 is a plan view of the cover 5 from above, and FIG.
FIG. 10 is a sectional view taken along line BB of FIG. 9.

FIG. 11 shows a fifth embodiment, in which a vertically long resonance tube 6 is integrated with the lower surface of the main body 2 on the side of the throttle chamber mounting portion 2a. An opening 6 b at the upper end of 6 is opened in the main body 2. In the case where the resonance tube 6 is integrally provided outside the cover 5 or the main body 2, the air cleaner 1
There is an advantage that the internal volume of the battery does not change.

[0014]

[Effects of the Invention] The air cleaner of the present invention has an element
A cover on the top of the bottomed body that is installed and has an open top
The cover is attached in the shape of
An L-shaped resonance tube is provided integrally at the downstream corner.
The resonance tube is formed on an inclined surface whose bottom side is inclined.
A silencing path is formed between the cover and the top
In addition, an opening that opens to the main body side is formed at one end of the resonance tube.
The end opposite to the opening forms a closed closure.
The length of the resonance tube depends on the pressure pulse generated in the air cleaner.
Set to a length corresponding to a quarter wavelength of the frequency of motion.
As a result, the pressure pulsation generated inside the air cleaner is suppressed by the resonance tube, the vibration of the air cleaner is suppressed, and the radiation sound emitted from the air cleaner is extremely reduced, and the cost and cost of the air cleaner are reduced. This has the effect that the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of an air cleaner according to a first embodiment.

FIG. 2 is a bottom view of the cover of FIG. 1 as viewed from below.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view of an air cleaner according to a second embodiment.

FIG. 5 is a plan view of the main body with the cover of FIG. 4 removed.

FIG. 6 is a side view of an air cleaner according to a third embodiment.

FIG. 7 is a plan view of the main body with the cover of FIG. 6 removed.

FIG. 8 is a side view of an air cleaner according to a fourth embodiment.

FIG. 9 is a plan view of the cover of FIG. 8;

FIG. 10 is a sectional view taken on line BB of FIG. 9;

FIG. 11 is a side view of an air cleaner according to a fifth embodiment.

FIG. 12 is a plan view of the main body with the cover of FIG. 11 removed;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Main body 2a Throttle chamber attachment part 3 Duct 4 Element 5 Cover 6 Resonance tube 6a Inclined surface 6b Opening 6c Closed part C Clean side R Silence path

Claims (1)

(57) [Scope of request for utility model registration] An element (4) is provided inside and an upper surface is opened.
A cover 5 is attached on the upper surface of the bottomed main body 2 in the form of a cover.
And a corner downstream of the element 4 in the cover 5
An L-shaped resonance tube 6 is integrally provided in the portion,
A cover 6 is formed on an inclined surface 6a having a bottom surface inclined.
5 has a silencing path R between the upper surface 5b and the upper surface 5b.
In addition, one end of the resonance tube 6 has an opening 6
b is formed, and the end opposite to the opening 6b is closed.
The length of the resonance tube 6 is equal to that of the air cleaner 1.
Length of 1/4 wavelength of the frequency of pressure pulsation generated in the chamber
An air cleaner characterized in that the length is set to correspond to the length of the air cleaner.