CN104771114B

CN104771114B - Dust collector

Info

Publication number: CN104771114B
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: 2017-05-10
Anticipated expiration: 2034-01-10
Also published as: CN104771114A; 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 dust catcher

Technical field

The utility model is related to dust catcher, especially with the dust catcher of duct silencer.

Background technology

Existing dust catcher product is wrapped in motor air outlet to reach the purpose of noise reduction using porous material such as sponge etc., this The shortcoming for planting way is the flow that the use of porous material have impact on air-out.Patent CN200510095446 has to the problems referred to above Improved, the patent arranges aperture to reach the purpose of noise reduction in dust catcher air outlet position, and this structure is not made by little The airflow direction in hole changes, and the depth of aperture is limited by mould and injection requirement, and noise reduction is not fairly obvious.Korea Spro State's patent KR20070078336 discloses a kind of porous tubular structured in the inside air channel of dust catcher, and it uses similar drop The mode noise reduction of mode of making an uproar both micropore jet.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of more preferable dust catcher of erasure effect, reduces whole machine fortune Ensure air mass flow while row noise.

The present invention provides a kind of dust catcher, and it includes：Air channel, hush pipe, the hush pipe is arranged in dust absorbing air passage, is disappeared Sound tube is provided with openend and blind end, and blind end is oppositely arranged with openend, there is wall extension between openend and blind end, prolongs Stretch hole arranged on wall, air channel interior air-flow flows out into hush pipe from openend from the hole, and described hush pipe is additionally provided with wind Plate, providing holes on aerofoil, outgassing direction and the outgassing direction in hole on wall extension in the aerofoil hole cross to form turbulent flow area.

Preferably, the aperture in hole is less than or equal to 5 millimeters, and any holes hole is in the heart away from l and two aperture d₁And d₂Meet Formula l >=d₁+d₂。

Preferably, aperture d₁And d₂It is equal.

Preferably, aperture d₁And d₂It is unequal.

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

Preferably, there is draw-in groove fixing device, in described aerofoil insertion draw-in groove in air channel.

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

When dust catcher runs, the fraction in air channel enters hush pipe air-flow being less than on wall extension by openend 5 millimeters of hole sprays, and forms the high-frequency sound outside human auditory system scope, the hole spray on another part air-flow Jing aerofoils in air channel Go out, because outgassing direction and the outgassing direction in hole on wall extension in aerofoil hole cross, therefore the air-flow sprayed by aerofoil hole makes to prolong Stretch the airflow direction sprayed in the hole on wall to change to form air disturbance phenomenon, and the chamber between hush pipe and wind path wall Form turbulent flow area in vivo, above-mentioned flow-disturbing phenomenon can enter to reduce the noise reduction that noise grade improves hush pipe, described l >= d₁+d₂Make that circular hole is not excessively intensive to guarantee noise reduction, while ensureing air output.

Description of the drawings

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

Fig. 2 is X-X generalized sections 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 drawings.

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

Fig. 9 is the hush pipe schematic diagram of embodiment two.

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

Specific embodiment

The utility model is further detailed below in conjunction with accompanying drawing：

Embodiment one：A kind of dust catcher includes with reference to shown in Fig. 1：Suction is provided with for providing in the head 6 of power, head 6 Dirt device air channel 1, dust absorbing air passage 1 is surrounded in a ring by perisporium 12, and air channel passes through draw-in groove built with hush pipe 2, hush pipe 2 with air channel , there is cavity 3 between the wall extension 23 of hush pipe 2 and perisporium 12 in being connected between 11 and aerofoil 21.The draw-in groove 11 is arranged On perisporium 12, the opening 22 that the aerofoil 21 is arranged on hush pipe 2 is peripheral, providing holes 210 on aerofoil 21, draw-in groove 11 and aerofoil Being completely embedded between 21 prevents air-flow from by the connection gap between draw-in groove 11 and aerofoil 21, a part of air-flow passes through noise reduction The openend 22 of pipe 2 is entered inside hush pipe 2, then is flowed in the cavity 3 between wall extension 23 and perisporium 12 by hush pipe 2.

Shown in reference picture 2-7, hush pipe 2 is provided with openend 22 and the openend 22 of blind end 24 and blind end 24 respectively in length It is square be oppositely arranged and openend 22 sectional area more than blind end 24 sectional area, the outside of openend 22 is provided with aerofoil 21, Aerofoil 21 can easily insert draw-in groove 11 (ginseng Fig. 8), be wall extension 23 between openend 22 and blind end 24, and wall extension 23 is wrapped The side 27 of bottom surface 26, two and cambered surface 28 are included, each face is covered with hole 25 of the size same diameter less than 5 millimeters, wall extension 23 Bottom surface 26 and two sides 27 are plane, as shown in figure 4, the height of cambered surface 28 is gradually lowered from openend 22 to blind end 24, And the cross-sectional area from openend 22 to road blind end 24 is gradually reduced, there is noise gas propagation direction in the blind end 24 Turnover noise is decayed.

With reference to shown in Fig. 3, fraction V1 enters the interior air-flow of hush pipe 2 through extending by openend 22 when dust catcher works Hole 25 on wall 23 less than 5 millimeters sprays, and forms the high-frequency sound outside human auditory system scope, another part air-flow V2 in air channel Hole 210 sprays on Jing aerofoils, because outgassing direction and the outgassing direction in hole on wall extension 25 in aerofoil hole 210 cross, therefore by The air-flow that aerofoil hole 210 sprays makes the airflow direction that the hole 25 on wall extension sprays change to form air disturbance phenomenon, and Turbulent flow area S is formed in cavity 3 between hush pipe and wind path wall, above-mentioned flow-disturbing phenomenon can further reduce noise grade The noise reduction of hush pipe is improved so as to reach the purpose of noise reduction.

With reference to shown in Fig. 7, the figure be the structure for amplifying of any two circular hole 25 in the surface of hush pipe 2, the centre distance of circular hole 25 and Aperture d₁And d₂Meet inequality l >=d₁+d₂, d in the present embodiment₁=d₂, the structure hole is in the heart the two of aperture away from l minimum of a values Times so that the distance between circular hole 25 will not be too small and affect noise reduction, hole is less away from l in the heart, circular hole 25 on wall extension 23 Closeness it is bigger, to meet the air-out requirement of dust catcher, the less hole heart reduces can the volume of hush pipe 2 to be allowed to away from l It is easily installed 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 is simple with the structure of draw-in groove 11 Single connection secure seal is functional, can simplify production technology step and beat, and reduces human input, improve production efficiency.

Embodiment two

With reference to shown in Fig. 9：Hush pipe in second embodiment of hush pipe 2, its appearance profile and embodiment one Identical, i.e., including openend 22 and blind end 24, openend 22 is oppositely arranged with blind end 24, openend 22 and blind end 24 it Between be provided with wall extension 23, wall extension 23 has a bottom surface 26 and two sides 27 for being plane, and top surface is cambered surface 28, cambered surface 28 height is gradually lowered from openend 22 to blind end 24, and the cross-sectional area from openend 22 to blind end 24 is gradually reduced, 23 4 faces of wall extension are provided with circular hole 25 and aperture 29.

Hush pipe 2 is changed relative to the hush pipe 2 described in embodiment one, the size in the aperture on its wall extension 23, Hush pipe 2 is covered with circular hole 25 for 22 near openend, and hush pipe 2 is covered with aperture 29, the hole of the circular hole 25 for 24 near blind end Footpath is respectively less than 5 millimeters more than the aperture of the aperture of aperture 29, the circular hole 25 and aperture 29.

With reference to shown in Figure 10：The aperture d of circular hole 25₁With the aperture d of aperture 29₂Meet inequality l >=d away from l in the heart with hole₁+d₂, The inequality make circular hole 25 and aperture 29 will not excessively intensive impact noise reduction, in the case where air-out effect is ensured, Kong Xin The volume of the less hush pipe 2 of spacing l is less, makes it easier to be arranged in the less space in dust catcher air channel 1.

In the above two embodiments, a part of air-flow enters hush pipe, gas by openend when one side dust catcher runs Hole of the stream on wall extension less than 5 millimeters sprays, and forms the high-frequency sound outside human auditory system scope；In another aspect air channel Hole on another part air-flow Jing aerofoils sprays, because the outgassing direction in hole is handed over the outgassing direction in hole on wall extension on aerofoil Converge, therefore the air-flow sprayed by hole on aerofoil makes the airflow direction that the hole on wall extension sprays change to form air disturbance and show As, and turbulent flow area is formed in the cavity between hush pipe and wind path wall, above-mentioned flow-disturbing phenomenon can be entered to reduce noise grade Improve the noise reduction of hush pipe.The technical program hinge structure can reduce 3-4 decibels in overall noise reduction.

It is above-mentioned for the utility model preferred embodiment, but the utility model is non-limiting in this.Those skilled in the art exist Can make without departing from the utility model right and change and change, therefore the utility model is with claims It is defined.

Claims

1. a kind of dust catcher, it includes：Air channel, hush pipe, the hush pipe is arranged in dust absorbing air passage, and hush pipe is provided with opening End and blind end, blind end is oppositely arranged with openend, there is wall extension between openend and blind end, arranges on wall extension Hole, air channel interior air-flow flows out into hush pipe from openend from the hole, it is characterised in that：Described hush pipe is additionally provided with wind Plate, providing holes on aerofoil, the outgassing direction in the hole on outgassing direction and the wall extension in the hole arranged on the aerofoil crosses and to be formed Turbulent flow area.

2. a kind of dust catcher according to claim 1, it is characterised in that：The aperture in the hole on the wall extension is less than or waits In 5 millimeters, the aperture d in the hole in the hole on wall extension described in any two hole in the heart on l and the wall extension described in two₁And d₂It is full Sufficient inequality l >=d₁+d₂。

3. a kind of dust catcher according to claim 2, it is characterised in that：The aperture d₁And d₂It is equal.

4. a kind of dust catcher according to claim 2, it is characterised in that：There is the aperture d₁And d₂It is unequal.

5. a kind of dust catcher according to claim 1, it is characterised in that：There is chamber between the wall extension and air channel perisporium Body, described turbulent flow area is within the cavity.

6. a kind of dust catcher according to claim 1, it is characterised in that：There is draw-in groove fixing device in air channel, it is described In aerofoil insertion draw-in groove.

7. a kind of dust catcher according to claim 4, it is characterised in that：The hush pipe is transversal to blind end by openend Face is gradually reduced.