U.S. patent application number 10/726063 was filed with the patent office on 2005-03-03 for silencer for vacuum cleaner.
Invention is credited to Ni, Zugen.
Application Number | 20050044654 10/726063 |
Document ID | / |
Family ID | 34085340 |
Filed Date | 2005-03-03 |
United States Patent
Application |
20050044654 |
Kind Code |
A1 |
Ni, Zugen |
March 3, 2005 |
Silencer for vacuum cleaner
Abstract
The present invention provides a silencer for a vacuum cleaner.
The silencer for the vacuum cleaner comprises at least one
silencing board mounted in an exhaust channel of the vacuum cleaner
for passage of an exhaust airflow from the vacuum cleaner. A
plurality of pores are distributed throughout in the silencing
board. The silencing board is mounted in an orientation
perpendicular to the direction of the airflow through the exhaust
channel. The silencer for a vacuum cleaner can considerably
diminish the noise generated by the vacuum cleaner in
operation.
Inventors: |
Ni, Zugen; (Suzhou City,
CN) |
Correspondence
Address: |
Min (Amy) S. Xu
DORSEY & WHITNEY LLP
Intellectual Property Department
50 South Sixth Street, Suite 1500
Minneapolis
MN
55402-1498
US
|
Family ID: |
34085340 |
Appl. No.: |
10/726063 |
Filed: |
December 2, 2003 |
Current U.S.
Class: |
15/326 |
Current CPC
Class: |
A47L 9/0081
20130101 |
Class at
Publication: |
015/326 |
International
Class: |
A47L 005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 26, 2003 |
CN |
03152869.4 |
Claims
1. A silencer for a vacuum cleaner, which comprises at least one
silencing board mounted in an exhaust channel of the vacuum cleaner
for passage of an exhaust airflow from the vacuum cleaner, with a
plurality of pores (2) distributed throughout in the silencing
board.
2. A silencer for a vacuum cleaner according to claim 1 wherein the
silencing board is mounted in an orientation perpendicular to the
direction of the airflow passing through the exhaust channel.
3. A silencer for a vacuum cleaner according to claim 1 wherein the
total passage area of the pores is less than half of the
cross-sectional area of the exhaust channel.
4. A silencer for a vacuum cleaner according to claim 1 wherein the
diameter of each of the pores in the silencing board is less than 6
mm.
5. (Cancelled).
Description
FIELD OF THE INVENTION
[0001] The invention relates to a silencer for a vacuum
cleaner.
BACKGROUND OF THE INVENTION
[0002] In conventional exhaust air silencers for vacuum cleaners,
the noise is reduced by means of increasing the tortuosity of the
airflow channel, i.e. by using labyrinthic airflow channels, to
dissipate sound energy and by means of disposing porous
sound-absorbing materials at the turning corners of the airflow
channel to absorb sound energy. Poor noise silencing effect,
however, is the main disadvantage of the above-mentioned silencing
structures.
SUMMARY OF THE INVENTION
[0003] The object of the invention is to provide a silencer for a
vacuum cleaner, which utilizes one or more silencing boards mounted
in the exhaust channel to considerably diminish the noise generated
by a vacuum cleaner in operation.
[0004] In one aspect of the invention, a silencer for a vacuum
cleaner comprises at least one silencing board mounted in an
exhaust channel of the vacuum cleaner for passage of an exhaust
airflow from the vacuum cleaner. A plurality of pores are
distributed throughout in the silencing board.
[0005] In a further aspect of the invention, a silencer for a
vacuum cleaner comprises at least one silencing board mounted in an
exhaust channel of the vacuum cleaner for passage of an exhaust
airflow from the vacuum cleaner. A plurality of pores are
distributed throughout in the silencing board. The silencing board
is mounted in an orientation perpendicular to the direction of the
airflow passing through the exhaust channel.
[0006] In a more detailed aspect of the invention, a silencer for a
vacuum cleaner comprises at least one silencing board mounted in an
exhaust channel of the vacuum cleaner for passage of an exhaust
airflow from the vacuum cleaner. A plurality of pores are
distributed throughout in each of the at least one silencing board.
The silencing board is mounted in an orientation perpendicular to
the direction of the airflow through the exhaust channel. The total
passage area of the pores is less than half of the cross-sectional
area of the exhaust channel. The diameter of each por in the
silencing board is less than 6 mm, and wherein the thickness of the
silencing board is larger than 0.5 mm.
[0007] The invention provides the following advantages:
[0008] 1. In the invention, one or more silencing boards are
mounted in the exhaust channel, which can effectively diminish the
noise generated by a vacuum cleaner in operation.
[0009] 2. The silencing board(s) of the invention can be directly
mounted in the exhaust channel, or be mounted in an expansion
chamber connected to the exhaust channel. The latter with the
silencing board(s) mounted within an expansion chamber will obtain
a better effect of noise reduction.
BRIEF DESCRIPTION OF THE DRAWINGS:
[0010] FIG. 1 is a sectional view schematically illustrating a
silencer for a vacuum cleaner according to the preferred embodiment
of the present invention, wherein:
[0011] the numeral 1 denotes a silencing board, 2 denotes pores,
and 3 denotes an exhaust channel.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0012] The invention is described bellow with reference to the
preferred embodiment of the invention shown in FIG. 1.
[0013] As shown in FIG. 1, a silencer for a vacuum cleaner
comprises three silencing boards 1 mounted in the exhaust channel
3. The silencing boards 1 are generally made of plastic material or
metal. A plurality of pores 2 are distributed throughout in each of
the silencing boards 1. Each of the silencing board 1 is mounted in
an orientation perpendicular to the direction of the airflow
passing through the exhaust channel 3. The total passage area of
the pores 2 in each of the silencing boards 1 is less than half of
the cross-sectional area of the exhaust channel 3. The diameter of
each of the pores 2 in the silencing boards 1 are less than 6 mm
and the thickness of each of the silencing boards 1 is larger than
0.5 mm.
[0014] In the invention, one or more silencing boards 1 are mounted
in the exhaust channel 3, which can effectively reduce the noise
generated by a vacuum cleaner in operation. The silencing board(s)
1 of the invention can be directly mounted in the exhaust channel
3, or be mounted in an expansion chamber connected to the exhaust
channel 3. The latter with the silencing board(s) mounted within an
expansion chamber will obtain a better effect of noise
reduction.
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