CN104771114A

CN104771114A - Wet or dry dust collector

Info

Publication number: CN104771114A
Application number: CN201410010009.0A
Authority: CN
Inventors: 汪波
Original assignee: Suzhou Cleva Electric Appliance Co Ltd
Current assignee: Suzhou Cleva Electric Appliance Co Ltd
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2015-07-15
Anticipated expiration: 2034-01-10
Also published as: CN104771114B; WO2015103966A1

Abstract

A dust collector comprises an air duct and a hush pipe, wherein the hush pipe is mounted in the dust collection air duct and provided with an open end and a closed end which are oppositely arranged; an extending wall with holes exists between the open end and the closed end; airflow in the air duct enters the hush pipe from the open end and flows out from the holes; the hush pipe is further provided with an air plate with holes; the air discharging directions of the holes of the air plate and air discharging directions of holes in the extending wall intersect to form a turbulence area; and the other part of the airflow in the air duct is sprayed out from the holes in the air plate. As the air discharging directions of the holes of the air plate and air discharging directions of holes in the extending wall intersect, airflow sprayed out from the holes in the air plate enables the direction of the airflow sprayed out from the holes in the extending wall to be changed, so that the air turbulence phenomenon occurs, the turbulence area is formed in a cavity between the hush pipe and the wall of the air duct, the noise grade can be further reduced by the turbulence phenomenon, and accordingly, the noise reduction effect of the hush pipe is improved.

Description

A kind of Wet-dry dust catcher

Technical field

The present invention relates to dust catcher, especially with the dust catcher of duct silencer.

Background technology

Existing dust catcher product adopts porous material such as sponge etc. to be wrapped in motor air outlet to reach the object of noise reduction, and the shortcoming of this way is that the use of porous material have impact on the flow of air-out.Patent CN200510095446 improves to some extent to the problems referred to above, this patent arranges aperture to reach the object of noise reduction at dust catcher air outlet position, this structure does not make to be changed by the airflow direction of aperture, and the degree of depth of aperture requires restriction by mould and injection moulding, noise reduction is not fairly obvious.Korean Patent KR20070078336 discloses a kind of porous tubular structured in the air channel, inside of dust catcher, and it uses the mode noise reduction of similar noise reduction mode both micropore jet.

Summary of the invention

Technical problem to be solved by this invention is to provide the better dust catcher of a kind of erasure effect, ensures air mass flow while reducing complete machine running noises.

The invention provides a kind of dust catcher, it comprises: air channel, hush pipe, described hush pipe is arranged in dust absorbing air passage, and hush pipe is provided with openend and blind end, and blind end and openend are oppositely arranged, wall extension is there is between openend and blind end, hole arranged on wall extension, in air channel, air-flow enters hush pipe and flows out from described hole from openend, and described hush pipe is also provided with aerofoil, providing holes on aerofoil, on the outgassing direction in described aerofoil hole and wall extension, the outgassing direction in hole crosses and forms turbulent flow area.

Preferably, the aperture in hole is less than or equal to 5 millimeters, any holes hole distance in the heart with two apertures with meet inequality .

Preferably, aperture with equal.

Preferably, aperture with unequal.

Preferably, there is cavity between wall extension and air channel perisporium, described turbulent flow area is positioned at cavity.

Preferably, have draw-in groove fixture in air channel, described aerofoil inserts in draw-in groove.

Preferably, described hush pipe is reduced to blind end cross section gradually by openend.

When dust catcher runs, fraction in air channel enters the hole ejection that be less than 5 millimeter of hush pipe air-flow on wall extension by openend, form the extraneous high-frequency sound of human auditory system, the hole ejection of another part air-flow in air channel on aerofoil, because on the outgassing direction in aerofoil hole and wall extension, the outgassing direction in hole crosses, therefore the air-flow sprayed by aerofoil hole makes the airflow direction sprayed in the hole on wall extension change and forms air disturbance phenomenon, and form turbulent flow area in cavity between hush pipe and wind path wall, above-mentioned flow-disturbing phenomenon can enter the noise reduction that noise decrease grade improves hush pipe, described make that circular hole is too not intensive guarantees noise reduction, ensure air output simultaneously.

Accompanying drawing explanation

Fig. 1 is dust catcher air channel cross section view.

Fig. 2 is X-X generalized section in Fig. 1.

Fig. 3 is close-up schematic view in Fig. 2.

Fig. 4 is hush pipe schematic diagram.

Fig. 5 is hush pipe front view.

Fig. 6 is hush pipe lateral plan.

Fig. 7 is Fig. 6 partial enlarged drawing.

Fig. 8 is dust catcher air channel bottom sectional schematic diagram.

Fig. 9 is embodiment two hush pipe schematic diagram.

Figure 10 is Fig. 9 close-up schematic view.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is further detailed:

Embodiment one: comprise with reference to a kind of dust catcher shown in Fig. 1: for providing the head 6 of power, dust catcher air channel 1 is provided with in head 6, dust absorbing air passage 1 is surrounded by perisporium 12 ringwise, air channel is built with hush pipe 2, by being connected and fixed between draw-in groove 11 and aerofoil 21, between hush pipe 2 wall extension 23 and perisporium 12, there is cavity 3 in hush pipe 2 and air channel.Described draw-in groove 11 is arranged on perisporium 12, the opening 22 that described aerofoil 21 is arranged on hush pipe 2 is peripheral, providing holes 210 on aerofoil 21, connection between draw-in groove 11 and aerofoil 21 closely makes air-flow not by the connection gap between draw-in groove 11 and aerofoil 21, it is inner that part air-flow enters hush pipe 2 by hush pipe 2 openend 22, then flowed in the cavity 3 between wall extension 23 and perisporium 12 by hush pipe 2.

With reference to shown in Fig. 2-7, hush pipe 2 is provided with openend 22 and blind end 24 openend 22 and blind end 24 and is rectangle respectively and is oppositely arranged and the sectional area of openend 22 is greater than the sectional area of blind end 24, the outside of openend 22 is provided with aerofoil 21, aerofoil 21 can insert draw-in groove 11(easily and join Fig. 8), it is wall extension 23 between openend 22 and blind end 24, wall extension 23 comprises bottom surface 26, two sides 27 and cambered surface 28, each face is covered with the hole 25 that size same diameter is less than 5 millimeters, bottom surface 26 and two sides 27 of wall extension 23 are plane, as shown in Figure 4, the height of cambered surface 28 reduces from openend 22 gradually to blind end 24, and reduce gradually from the cross-sectional area of 22 to road, openend blind end 24, described blind end 24 makes noise gas propagation direction generation turnover noise decay.

With reference to shown in Fig. 3, during dust catcher work, fraction V1 enters by openend 22 hole 25 that air-flow in hush pipe 2 is less than 5 millimeters on wall extension 23 and sprays, form the extraneous high-frequency sound of human auditory system, another part air-flow V2 hole 210 on aerofoil in air channel sprays, because on the outgassing direction in aerofoil hole 210 and wall extension, the outgassing direction in hole 25 crosses, therefore the airflow direction that the air-flow sprayed by aerofoil hole 210 makes the hole 25 on wall extension spray changes and forms air disturbance phenomenon, and form turbulent flow area S in cavity 3 between hush pipe and wind path wall, above-mentioned flow-disturbing phenomenon can noise decrease grade improve the noise reduction of hush pipe thus reach the object of noise reduction further.

With reference to shown in Fig. 7, this figure is the structure for amplifying of any two circular holes 25 in hush pipe 2 surface, circular hole 25 centre distance and aperture with meet inequality , in the present embodiment , this structure hole distance in the heart minimum of a value is the twice in aperture, makes the distance between circular hole 25 can not be too small and affect noise reduction, and hole is distance in the heart less, on wall extension 23, the closeness of circular hole 25 is larger, to meet the air-out requirement of dust catcher, and less hole heart distance the volume of hush pipe 2 can be made to reduce to make it to be convenient to be arranged in narrow and small dust catcher air channel.

With reference to shown in Fig. 8, draw-in groove 11 is arranged on perisporium 12 and is surrounded by both sides projection 13, and aerofoil 21 and draw-in groove 11 structure are simply connected firmly favorable sealing property, can simplify production technology step and beat, reduce human input, enhance productivity.

Embodiment two

With reference to shown in Fig. 9: the second embodiment of hush pipe 2, its appearance profile is identical with the hush pipe in embodiment one, namely openend 22 and blind end 24 is comprised, openend 22 and blind end 24 are oppositely arranged, wall extension 23 is provided with between openend 22 and blind end 24, wall extension 23 has the side 27 that a bottom surface 26 and two are plane, end face is cambered surface 28, the height of cambered surface 28 reduces from openend 22 gradually to blind end 24, cross-sectional area from openend 22 to blind end 24 reduces gradually, and wall extension 23 4 faces are provided with circular hole 25 and aperture 29.

Hush pipe 2 is relative to the hush pipe 2 described in embodiment one, the size in the aperture on its wall extension 23 changes to some extent, hush pipe 2 22 near openend is covered with circular hole 25, hush pipe 2 is covered with aperture 29 near blind end 24, described circular hole 25 aperture is greater than aperture 29 aperture, and the aperture of described circular hole 25 and aperture 29 is all less than 5 millimeters.

With reference to shown in Figure 10: circular hole 25 aperture with aperture 29 aperture with hole distance in the heart meet inequality , this inequality makes circular hole 25 and aperture 29 too intensively can not affect noise reduction, and when ensureing air-out effect, hole is distance in the heart the volume of less hush pipe 2 is less, makes it to be convenient to be arranged in less space, dust catcher air channel 1.

In the above two embodiments, when dust catcher runs on the one hand, part air-flow enters hush pipe by openend, and air-flow is less than the hole ejection of 5 millimeters on wall extension, forms the extraneous high-frequency sound of human auditory system; The hole ejection of another part air-flow on the other hand in air channel on aerofoil, because on the outgassing direction in hole on aerofoil and wall extension, the outgassing direction in hole crosses, therefore the airflow direction that the air-flow sprayed by hole on aerofoil makes the hole on wall extension spray changes and forms air disturbance phenomenon, and forming turbulent flow area in cavity between hush pipe and wind path wall, above-mentioned flow-disturbing phenomenon can enter the noise reduction that noise decrease grade improves hush pipe.The technical program hinge structure can reduce 3-4 decibel in overall noise reduction.

Above-mentioned is preferred embodiment of the present invention, but the present invention is non-limiting in this.Those skilled in the art all can make and change and revise not departing from the claims in the present invention scope, and therefore the present invention is as the criterion with claims.

Claims

1. a dust catcher, it comprises: air channel, hush pipe, described hush pipe is arranged in dust absorbing air passage, hush pipe is provided with openend and blind end, blind end and openend are oppositely arranged, wall extension is there is between openend and blind end, hole arranged on wall extension, in air channel, air-flow enters hush pipe and flows out from described hole from openend, it is characterized in that: described hush pipe is also provided with aerofoil, providing holes on aerofoil, on the outgassing direction in described aerofoil hole and wall extension, the outgassing direction in hole crosses and forms turbulent flow area.

2. a kind of dust catcher according to claim 1, is characterized in that: the aperture in described hole is less than or equal to 5 millimeters, any holes hole distance in the heart with two apertures with meet inequality .

3. a kind of dust catcher according to claim 2, is characterized in that: described aperture with equal.

4. a kind of dust catcher according to claim 2, is characterized in that: there is described aperture with unequal.

5. a kind of dust catcher according to claim 1, it is characterized in that: there is cavity between described wall extension and air channel perisporium, described turbulent flow area is positioned at cavity.

6. a kind of dust catcher according to claim 1, is characterized in that: have draw-in groove fixture in air channel, and described aerofoil inserts in draw-in groove.

7. a kind of dust catcher according to claim 4, is characterized in that: described hush pipe is reduced to blind end cross section gradually by openend.