CN102379659A

CN102379659A - Dust collection aid

Info

Publication number: CN102379659A
Application number: CN2010102715867A
Authority: CN
Inventors: 彭文阳; 蔡雅惠; 刘俊贤
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2010-09-02
Filing date: 2010-09-02
Publication date: 2012-03-21
Anticipated expiration: 2030-09-02
Also published as: CN102379659B

Abstract

The invention discloses a dust collection aid, which comprises a first body, a second body and a transducer. The first body is provided with a first inlet and a first outlet which are connected to form a passage, the second body is provided with a second inlet and a second outlet, the second inlet and the second outlet are arranged between the first inlet and the first outlet and communicated with the passage of the first body, total airflow comes into the first body through the first inlet to be split into first airflow and second airflow, the first air flow flows to the first outlet, the second airflow flows into the second body from the second inlet to pass through the transducer, the transducer is driven to generate power, the second airflow flows into the first body from the second outlet to be mixed with the first airflow, and the mixed flow flows out of the first body from the first outlet.

Description

The dust suction servicing unit

Technical field

The present invention relates to a kind of dust suction servicing unit; Especially relate to a kind of dust suction servicing unit that is provided with second body independently and a transducing head, and be provided with filter elements such as filter screen, not only can convert wind energy into electric energy through transducing head in this second body; And can avoid transducing head directly to suffer dust pollution; In addition, the modular design of the present invention, the user can be according to actual required dismounting in dust catcher.

Background technology

General domestic vacuum cleaners have many removable accessories in order to the various environment of cleaning; Like carpet, curtain, corner, slit ... wait and to use different accessory cleanings; But, but be not difficult to find a problem, owing to do not see the design that combines illumination to combine at present with the dust suction accessory when at the bottom of the needs cleanings sofa or bed during the end; Tend to because of no light source can't carry out the cleaning work of dark place, always need to hold one group of illumination in addition again and could continue cleaning.

The principle of dust catcher is that the high speed through motor is rotated in and forms vacuum in the main frame; Utilize the high velocity air that is produced from cleaner head suction inlet inspiration rubbish; Air then purifies through screen pack and is discharged from outside the dust catcher; Based on this characteristic, in existing patent, visible many technological means that wind energy converted into kinetic energy; " Vacuum cleaner ", 6261379 " Floating agitator housing for a vacuum cleaner head " of disclosing respectively of United States Patent (USP) 6101667,6055702,6023814 for example; And the structure of dust collector that discloses respectively of Japan Patent JP2006051171, JP10057287, the electric power that its generator produced provides the indicator lamp or the dust sensor required electric power of dust catcher; The structure of above-mentioned existing patent mainly is divided into two kinds; Wherein a kind of is that impeller or generator are arranged in the cleaner head of dust catcher (for example United States Patent (USP) 6261379, Japan Patent JP2006051171, JP10057287), after wind-force is sucked by cleaner head, and direct drives impeller or generator generation kinetic energy; Though this kind type of drive is direct; But because the air-flow that cleaner head sucked, dust content is high usually, moving parts such as impeller that gas shock drives or generator; Adhere to objects such as soft flocks dust easily, even cause spinner member stuck; Another kind of structure as for existing patent; Be to be provided with an air intake vent in addition at the dust catcher conduit; Impeller or generator are arranged in the conduit of this air intake vent (for example United States Patent (USP) 6101667,6055702,6023814); Can import wind drive impeller or generator in addition by the conduit outside; Though this kind mode can avoid impeller or generator directly to suffer high dust pollution,, therefore also can't effectively improve situation about being polluted because impeller or generator still are exposed in the conduit path of dust circulation.In addition, the wind energy transformational structure that above-mentioned existing patent proposed all is fixedly set in the dust catcher, arbitrarily dismounting of user, and maintenance is difficult for.

Summary of the invention

The object of the present invention is to provide a kind of dust suction servicing unit; Transducing head is arranged at independently in second body, and is provided with filter elements such as filter screen, not only can convert wind energy into electric energy through transducing head at this second body; And can avoid transducing head directly to suffer dust pollution; In addition, the modular design of the present invention, the user can be according to actual required dismounting in dust catcher.

For achieving the above object, the present invention proposes a kind of dust suction servicing unit, comprises:

First body, it has one first inlet and one first outlet, forms a passage between this first inlet and first outlet;

Second body; Be arranged at a side of this first body; This second body have one second the inlet and one second the outlet, this second the inlet and second the outlet this first the inlet and first the outlet between, and this second the inlet and second the outlet be connected with the passage of this first body;

Transducing head; In order to convert wind energy into electric energy, a total air flow can be shunted and form one first air-flow and one second air-flow after getting into this first body by above-mentioned this first inlet; This first air-flow flows towards this first outlet; This second air-flow gets into this second body by this second inlet, and again through this transducing head, this second air communication can drive this transducing head and produce electric energy when crossing this transducing head; This second air-flow is flowed in this first body by this second outlet and converges with this first air-flow, and this first air-flow and this second air-flow flow out this first body by this first outlet more in the lump.

For making your juror further understanding and approval arranged for structure purpose of the present invention and effect, cooperate diagram to specify now as after.

Description of drawings

Fig. 1 is that the present invention is assembled in the dust collector structure sketch map;

Fig. 2 is a cross-sectional view of the present invention;

Fig. 3 to Fig. 6 is the different example structure sketch mapes of transducing head of the present invention;

Fig. 7 and Fig. 8 are the structural representations of the different air flow paths of conversion of the present invention.

The main element symbol description

100-dust suction servicing unit

10-first body

11-first inlet

12-first outlet

The 13-passage

14a～14c-baffle plate

20-second body

21-second inlet

22-second outlet

The 23-hollow part

The 24-filter element

The 25-change-over switch

The 26-mask

The 28-sub-shell

The 29-tapered channels

30,30A, 30B, 30C, 30D-transducing head

The 31A-aial flow impeller

The 311A-axle

The 312A-fixed mount

The rotatable magneto of 32A-swinging iron-free in-core

The 321A-exterior loop

322A-magnet

323A-back iron 31B-aial flow impeller

The 311B-axle

The 312B-fixed mount

The 32B-swinging does not have iron core outward rotation type permanent magnet generator

321B-coil support ring

The 322B-coil

323B-magnet

The 324B-back iron

31C-vibration light weight mover

The 32C-oscillatory type does not have iron core line property magneto 31D-vibration blade

311D-base material holder

The 312D-holder

The 40-light-emitting component

The 90-dust catcher

The 91-cleaner head

The 92-conduit

The 93-main frame

The F-total air flow

F1-first air-flow

F2-second air-flow

The F3-outer gas stream

θ-angle

The specific embodiment

Below will describe the present invention for reaching employed technological means of purpose and effect, and the cited embodiment of following accompanying drawing is merely aid illustration, in order to your juror understands, but the technological means of this case is not limited to cited accompanying drawing with reference to the accompanying drawing of enclosing.

At first see also shown in Figure 1ly, dust suction servicing unit 100 provided by the present invention provides between the cleaner head 91 and conduit 92 that is assembled in general domestic vacuum cleaners 90, can be with reference to state shown in Figure 7; Maybe can be assembled between two conduits that dust catcher is connected with group; According to actual required and decide, when dust catcher 90 started, the motor (not shown on the way) that are provided with in the main frame 93 of dust catcher 90 can rotate at a high speed; And in main frame 93, form vacuum; Utilize the high velocity air produced from cleaner head 91 inspiration dust suction servicing units 100, conduit 92, discharged by this main frame 93, rubbish of being drawn and dust then are collected in the feeder in the main frame 93.

See also shown in Figure 2; Dust suction servicing unit 100 provided by the present invention; It is made up of one first body 10, one second body 20 and a transducing head 30, and this first body 10 and second body 20 have independently space separately, and this second body 20 is arranged at a side of first body 10; This second body 20 can be different with first body, 10 airflow directions, and this transducing head 30 is in order to convert wind energy into electric energy.

This first body 10 has 11 and 1 first outlet 12 of one first inlet, forms a passage 13 between this first inlet, 11 and first outlet 12, and this first inlet 11 connects this cleaner head 91 shown in Figure 1, and this cleaner head 91 connects this conduit 92 shown in Figure 1.This second body 20 has 21 and 1 second outlet 22 of one second inlet; This second inlet, 21 and second outlet 22 is between 11 and first outlet 12 of first inlet, and 21 and second outlet 22 of second inlet is connected with the passage 13 of first body 10, is provided with a light-emitting component 40 at the lateral wall of this second body 20; This light-emitting component 40 is electrically connected with transducing head 30; The electric energy that this transducing head 30 is produced can be luminous in order to drive this light-emitting component 40, and this light-emitting component 40 can adopt high brightness LED or bulb, in addition; This transducing head 30 can be electrically connected indicator lamp, display lamp or sensing apparatus, uses electrical loss when being supplied in demonstration, sensing.This first body 10 and second body 20 can be as shown in Figure 2 one-body molded, also combine after the moulding separately again.In this first body 10, be provided with a plurality of baffle plate 14a～14c; This baffle plate 14a～14c extends a length by the madial wall of this first body 10 towards this first inlet 11; And form an angle theta between the madial wall of this baffle plate 14a～14c and this first body 10, this angle theta is less than 90 degree, and wherein this baffle plate 14a is arranged at this second inlet 21 than the position near this first inlet 11; This baffle plate 14b, 14c are arranged at this second outlet, 22 relative both sides; Wherein this baffle plate 14b is arranged at this second outlet 22 near the position of this first outlet 12, and the effect of this baffle plate 14a～14c is the dust in the barrier air, avoids dust directly to get into this second body 20; This second body 20 is provided with a hollow part 23; This hollow part 23 is between this second inlet 21 and this transducing head 30; Secondly these hollow part 23 usefulness, are provided with a filter element 24 at second body 20 so that this second body, 20 inside can form connected state with external environment; This filter element 24 can adopt filter screen; This filter element 24 is arranged between second inlet 21 and the transducing head 30, and preferable near second inlet 21 trying one's best, and is beneficial to catch immediately by second inlet 21 get into the dust among the second air-flow F2 in second body 20.

In this second body 20, be provided with one and switch switch 25, this change-over switch 25 also includes a mask 26, and this mask 26 is positioned at by these change-over switch 25 controls closes or open state; These hollow part 23 correspondences are appeared close or open state, and this change-over switch 25 can be positioned at different switching positions by control, comprise this primary importance P1 shown in Figure 2, second place P2, the 3rd position P3; This change-over switch 25 shown in Figure 2 is positioned at primary importance P1, and this mask 26 is positioned at closed condition by change-over switch 25 controls, and this hollow part 23 presents closed condition; Make between these second inlet 21 (that is filter elements 24) and this transducing head 30 and form path, when this change-over switch 25 is positioned at second place P2, the path of this hollow part 23 capable of blocking and this second inlet 21 (that is filter elements 24); This mask 26 is positioned at open state by change-over switch 25 controls; And this hollow part 23 presents open state, and this hollow part 23 and these transducing head 30 formation paths, and when this change-over switch 25 is positioned at the 3rd position P3; The path of this hollow part 23 capable of blocking and this transducing head 30; This mask 26 is positioned at open state by change-over switch 25 control, and this hollow part 23 presents open state, and this hollow part 23 forms path with this second inlet, 21 (that is filter elements 24); About controlling of the effect of this change-over switch 25 in different switching positions; After will being described in more detail in, as for controlling the mode that this change-over switch 25 is positioned at different switching positions, can be through mechanism's formula rotary switch of outer setting; Or Electronic Control capable of using, do not repeat them here.

As previously mentioned; This transducing head 30 is in order to convert wind energy into electric energy, and this transducing head 30 is mainly become by an energy capture device and a TRT, by the wind energy of energy capture device acquisition air-flow; Drive generator by wind energy again and produce electric energy, its practical implementation structure such as Fig. 3 are to shown in Figure 6.

Transducing head 30A for example shown in Figure 3; It is made up of aial flow impeller 31A and the rotatable magneto 32A of swinging iron-free in-core; Aial flow impeller 31A is positioned a fixed mount 312A through an axle 311A; The rotatable magneto 32A of swinging iron-free in-core comprises that one is arranged at the exterior loop 321A of second body, 20 outsides; And be arranged at a magnet 322A and the back iron 323A in second body 20; Capture the wind energy of the second air-flow F2 by aial flow impeller 31A as the energy capture device, drive the rotatable magneto 32A of this swinging iron-free in-core again and produce electric energy, a magnetic force indirect transfer can be set between the rotatable magneto 32A of aial flow impeller 31A and swinging iron-free in-core rotate lotus root and attach together and put; Aial flow impeller 31A and the rotatable magneto 32A of swinging iron-free in-core are separated fully, receive dust pollution to avoid the rotatable magneto 32A of swinging iron-free in-core.

Transducing head 30B for example shown in Figure 4; It does not have iron core outward rotation type permanent magnet generator 32B by aial flow impeller 31B and swinging and constitutes; Aial flow impeller 31B is positioned between the two fixed mount 312B through an axle 311B; Swinging does not have iron core outward rotation type permanent magnet generator 32B and comprises a coil support ring 321B, a coil 322B, a magnet 323B and a back iron 324B; Capture the wind energy of the second air-flow F2 as the energy capture device by aial flow impeller 31B; Drive this swinging again and do not have iron core outward rotation type permanent magnet generator 32B generation electric energy; Aial flow impeller 31B and swinging do not have and magnetic force indirect transfer rotation lotus root can be set between the iron core outward rotation type permanent magnet generator 32B attach together and put, and aial flow impeller 31B and swinging are not had iron core outward rotation type permanent magnet generator 32B separate fully, receive dust pollution to avoid swinging not have iron core outward rotation type permanent magnet generator 32B.

Transducing head 30C and for example shown in Figure 5; It does not have iron core line property magneto 32C by vibration light weight mover 31C and oscillatory type and constitutes; 31C captures wind energy as the energy capture device by vibration light weight mover; Driving this oscillatory type does not again have iron core line property magneto 32C generation electric energy, and this oscillatory type does not have iron core line property magneto 32C and can be arranged in these second body, 20 outer set sub-shells 28.

Transducing head 30D shown in Figure 6 for another example; It captures wind energy by vibration blade 31D as the energy capture device; Drive an oscillatory type piezoelectric generator (not shown) again and produce electric energy; Vibration blade 31D is positioned second body, 20 madial walls through a base material 311D and a holder 312D, and this vibration blade 31D can adopt PZT (lead zirconate titanate) film, can produce distortion (shown in dotted line among the figure) in the oscillatory process.

Above-mentioned this vibration light weight mover 31C and oscillatory type do not have between the iron core line property magneto 32C; And should vibrate between blade 31D and the oscillatory type piezoelectric generator; One magnetic force indirect transfer mechanism can be set; Vibration light weight mover 31C and oscillatory type are not had between the iron core line property magneto 32C, and separate fully between this vibration blade 31D and the oscillatory type piezoelectric generator, to avoid oscillatory type not have iron core line property magneto 32C and the oscillatory type piezoelectric generator receives dust pollution.In addition; Like Fig. 5 and shown in Figure 6, in this second body 20, be provided with an internal diameter by big gradually little tapered channels 29, the end that dwindles of this tapered channels 29 leads to this vibration light weight mover 31C or vibration blade 31D; Can improve the flow velocity of the second air-flow F2 through this tapered channels 29, to promote generating efficiency.

In addition; What it must be emphasized that explanation is, above-mentioned

relevant transducing head

30,30A, 30B, 30C, 30D are provided with the position, all are to be positioned at this second body 20; Its main purpose is to make full use of the space of this second body 20; And the housing that forms this second body 20 can be simultaneously as the housing of transducing

head

30,30A, 30B, 30C, 30D, and still in addition, this transducing

head

30,30A, 30B, 30C, 30D do not limit and be arranged in this second body 20; Also can independently be arranged in another space or the housing, and this space or housing can be connected and get final product with this second body 20 and second outlet 22.

See also Fig. 1 and shown in Figure 2, specify the effect that air flow path of the present invention and the present invention can reach, after these dust catcher 90 starts; Can suck and form a total air flow F by cleaner head 91, total air flow F gets into first body 10 by first inlet 11, because the passage 13 of first body 10 is connected in second inlet 21 of second body 20; Therefore, total air flow F can shunt formation one first air-flow F1 and this first air-flow of one second air-flow F2 F1 flows towards first outlet 12, and the second air-flow F2 then can get into second body 20 by second inlet 21; Because this change-over switch 25 is positioned at primary importance P1; These second inlet, 21 (that is filter elements 24) form path with transducing head 30, and therefore, this second air-flow F2 is earlier through getting into this transducing head 30 again behind this filter element 24; Because this baffle plate 14a stops dust; Therefore and filter once more by filter element 24, can guarantee to get into the cleaning of the second air-flow F2 of transducing head 30, protection transducing head 30 unlikely pollutions and damaging; When the second air-flow F2 passes through this transducing head 30; Can drive this transducing head 30 and produce electric energy; Luminous in order to drive this light-emitting component 40; This second air-flow F2 flows in this first body 10 by this second outlet 22 again and this first air-flow F1 converges and flow out this first body 10 by this first outlet 12 in the lump, gets into this conduit 92 shown in Figure 1 again.

Mandatory declaration be; This second inlet, bore of 21 of illustrated embodiment is less than this first inlet 11, because the electric energy that this transducing head 30 is produced mainly provides driven light-emitting element 40 luminous, or uses electrical loss when being supplied in demonstration, sensing; Belong to the smaller power electricity consumption; Therefore, the flow of this second air-flow F2 gets final product less than the flow of this first air-flow F1, also can avoid influencing dust catcher suction on the other hand.As shown in Figure 1; Through the light that this light-emitting component 40 sends, can assist the user when the dark position of the cleaning bed end, sofa bottom or insufficient light, the appropriateness illumination to be provided, in addition; Can this light-emitting component 40 be set to the structure of adjustable angle, the user can adjust required irradiating angle in good time.

See also shown in Figure 7ly, this change-over switch 25 is positioned at second place P2, the path of this hollow part 23 capable of blocking and this second inlet 21 (that is filter elements 24); This mask 26 is positioned at open state by change-over switch 25 controls, makes this hollow part 23 present open state, and this hollow part 23 forms path with this transducing head 30; Thus; When the dust catcher start, get into first main body 10 except introducing total air flow F by first inlet 11, can introduce outer gas stream F3 through this hollow part 23 simultaneously and get into second body 20; When this outer gas stream F3 passes through transducing head 30; Can drive transducing head 30 equally and produce electric energy, in other words, the present invention not only total air flow shunting of cleaner head capable of using drives transducing head 30; Also can introduce outside clean gas in addition and drive transducing head 30 generation electric energy; Same, this outer gas stream F3 can be by converging with this total air flow F in the passage 13 of these second outlet, 22 these first bodies 10 of inflow and flowing out this first body 10 by this first outlet 12 in the lump through behind the transducing head 30.

See also shown in Figure 8ly, this change-over switch 25 is positioned at the 3rd position P3, the path of this hollow part 23 capable of blocking and this transducing head 30; This mask 26 is positioned at open state by change-over switch 25 controls, and this hollow part 23 presents open state, and this hollow part 23 forms path with these second inlet, 21 (that is filter elements 24); Thus, when the dust catcher start, get into first main body 10 by first inlet 11 except introducing total air flow F; Can introduce outer gas stream F3 through this hollow part 23 simultaneously and get into second body 20; Because second gate 24 is positioned at the closed position, so this outer gas stream F3 is guided towards this filter element 24 and flows, and can carry out cleaning to this filter element 24 through this outer gas stream F3; When outer gas stream F3 passes through this filter element 24; Can the dust on the filter element 24 be blown off, and can 21 take dust out of this second body 20 by this second inlet in the lump, and the passage 13 that gets into this first body 10 converges with total air flow F and flows out these first bodies 10 by this first outlet 12 in the lump by outer gas stream F3; Reach the purpose of cleaning filter elements 24 thus, avoid the too much dust of filter element 24 accumulations.

In sum, the dust suction servicing unit that flowed energy provided by the invention is caught is arranged at transducing head independently in second body; And be provided with filter elements such as filter screen at this second body; Not only can convert wind energy into electric energy, and can avoid transducing head directly to suffer dust pollution, in addition through transducing head; The modular design of the present invention; The user can comply with actual required dismounting in dust catcher, and the present invention has more the characteristic that can change the introduction air flow path, gives the present invention and has additional functions.Verify through the real sample of doing, general family expenses catheter type dust catcher, its motor power is 600～1800W; The actual about 100～300W of power that sucks if the work air quantity is 2CMM (a cubic meter per minute), sucks the about 300W of power; Set power that second body consumed in 10W; The whole conversion efficiency of transducing head can produce 1～2W electric power approximately 10～20%, shunting of second body or the about 0.1CMM of air capacity (cubic meter per minute) that introduces; And general led lighting power only need about 0.5W, proves that so the present invention has exploitativeness really.

The above-described embodiments of the invention that are merely, when can not with the scope implemented of qualification the present invention.The equalization of promptly doing according to claim of the present invention generally changes and modifies, and all should still belong in the scope that patent of the present invention contains, sincerely please your juror's explicit example for reference, and it is accurate to pray favour, is that institute is to praying.

Claims

1. dust suction servicing unit comprises:

First body, it has first inlet and first outlet, forms a passage between this first inlet and first outlet;

Second body; Be arranged at a side of this first body; This second body have second the inlet and second the outlet, this second the inlet and second the outlet this first the inlet and first the outlet between, and this second the inlet and second the outlet be connected with the passage of this first body;

Transducing head; In order to convert wind energy into electric energy, a total air flow can be shunted and form first air-flow and second air-flow after getting into this first body by above-mentioned this first inlet; This first air-flow flows towards this first outlet; This second air-flow gets into this second body by this second inlet, and again through this transducing head, this second air communication can drive this transducing head and produce electric energy when crossing this transducing head; This second air-flow is flowed in this first body by this second outlet and converges with this first air-flow, and this first air-flow and this second air-flow flow out this first body by this first outlet more in the lump.

2. dust suction servicing unit as claimed in claim 1 wherein is provided with filter element in second body, and this filter element is arranged between this second inlet and this transducing head, and this second air communication gets into this transducing head after crossing this filter element again.

3. dust suction servicing unit as claimed in claim 1, wherein the flow of this second air-flow is less than the flow of this first air-flow, and airflow direction is inequality.

4. dust suction servicing unit as claimed in claim 1, wherein this transducing head comprises that energy capture device and TRT become, and this energy capture device is in order to capture the wind energy of this second air-flow, and this wind energy produces electric energy in order to drive this generator.

5. dust suction servicing unit as claimed in claim 4, wherein this energy capture device is an impeller, this generator is a swinging coreless permanent magnet generator.

6. dust suction servicing unit as claimed in claim 5, wherein this impeller is axial wheel or resistance type impeller.

7. dust suction servicing unit as claimed in claim 4, wherein this energy capture device is vibration light weight mover, this generator is that oscillatory type does not have iron core line property magneto.

8. dust suction servicing unit as claimed in claim 4, wherein this energy capture device is the vibration blade, this generator is the oscillatory type piezoelectric generator.

9. dust suction servicing unit as claimed in claim 1, wherein this transducing head is electrically connected at least one light-emitting component, and the electric energy that this transducing head produced is luminous in order to drive this light-emitting component.

10. dust suction servicing unit as claimed in claim 1, wherein this light-emitting component is arranged at the lateral wall of this second body.

11. dust suction servicing unit as claimed in claim 1, wherein this second body is provided with hollow part, and this hollow part is between this second inlet and this transducing head, and this hollow part is used so that this second body interior and external environment form connected state.

12. dust suction servicing unit as claimed in claim 11 wherein is provided with change-over switch in this second body, this change-over switch has a plurality of switching positions; These a plurality of switching positions comprise primary importance, the second place and the 3rd position, when this change-over switch is positioned at primary importance, can make this hollow part present closed condition; Make between this second inlet and this transducing head and form path, when this change-over switch is positioned at this second place, the path of this hollow part capable of blocking and this second inlet; Make this hollow part present open state; And this hollow part and this transducing head form path, when this change-over switch is positioned at the 3rd position, and the path of this hollow part capable of blocking and this transducing head; This hollow part presents open state, and this hollow part and this second gone into the interruption-forming path.

13. dust suction servicing unit as claimed in claim 12, this change-over switch and include mask wherein, this mask is positioned at by this change-over switch control closes or open state, this hollow part correspondence is appeared close or open state.

14. dust suction servicing unit as claimed in claim 1; Wherein be provided with a plurality of baffle plates in this first body; This baffle plate extends a length by the madial wall of this first body towards this first inlet; And form an angle between the madial wall of this baffle plate and this first body; Wherein at least one baffle plate of these a plurality of baffle plates is arranged at this second inlet near the position of this first inlet, these a plurality of baffle plates wherein at least in addition two baffle plates be arranged at this relative both sides of second outlet, and this two baffle plate one of them be arranged at this second outlet near the position of this first outlet.

15. dust suction servicing unit as claimed in claim 14, wherein this angle is less than 90 degree.