CN201068560Y

CN201068560Y - Blowing-suction machine

Info

Publication number: CN201068560Y
Application number: CNU2007200388402U
Authority: CN
Inventors: 保罗·安德罗; 王其彬
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2007-06-21
Filing date: 2007-06-21
Publication date: 2008-06-04
Anticipated expiration: 2017-06-21

Abstract

The utility model relates to a single-handle operating portable blowing and sucking machine, which includes a main machine shell body, an operation handle, a motor arranged in the shell, a fan driven to rotate by the motor, a switch controlling the rotation of the motor, and a blowpipe and a sucking pipe which are connected on the main machine shell body. The blowpipe and the sucking pipe are fixedly connected and extended towards one side of the machine shell body. The sucking pipe is provided with a main body part extending along the lengthwise axis, and a bent part bending in an angle with the extension axis of the sucking pipe. The structure of the sucking pipe such designed ensures the single hand operation is easier and more convenient, and the dust absorbing effect is better.

Description

Blower

Technical field

The utility model relates to a kind of hand-hold operating apparatus, especially a kind of portable blower.

Background technology

Existing garden class blower, blow, the set-up mode of aspiration channel has two kinds usually, a kind of is that blower, the aspiration channel that is connected in host shell is respectively equipped with independently gas channel, be provided with switching mechanism energy effective closure dust mouth or inflatable mouth in the housing, and from realizing the conversion of blow mode and air-breathing mode; Another kind is that single gas channel only is set in the pressure-vaccum pipe, promptly blowing, inhale what utilize under two kinds of different mode of operations is same gas channel, air inlet port is set on the housing, effectively open or seal air inlet port by certain mechanism, blower just can be changed between blow mode and air-breathing mode.

Be to have disclosed a kind of blower in the patent specification of US6141823 as the United States Patent (USP) notification number, be provided with blower and aspiration channel on its host shell respectively, blower and aspiration channel extend in parallel and one connects, the blower diameter is bigger than aspiration channel diameter, and the aspiration channel diameter longitudinally diminishes gradually, is respectively arranged with insufflation channel and air intake passage in blower and the aspiration channel.

The United States Patent (USP) notification number is to have disclosed a kind of blower in the patent specification of US6735813 for another example, its pressure-vaccum pipe is the pressure-vaccum pipe that single cavity lane is set, this pressure-vaccum pipe can rotate on the Support Position of this body shell, its housing is provided with air inlet port, by 180 degree rotation pressure-vaccum pipes, the air inlet port on the casing can effectively be opened or seal to the pressure-vaccum pipe, thereby realized blowing, absorbed and change.

No matter above-mentioned be that the blowing of individual air stream passage, suction pipe are set, the pressure-vaccum pipe of single gas channel still is set, on Design of length, all must satisfy certain security regulations, promptly blow, the setting of suction pipe will reach certain length standard, especially for blow, aspiration channel all is the blower of rectilinear duct, the often relative host shell of the length of its pressure-vaccum pipe, seem out of proportion, influence overall appearance, and it is very not light to carry long pressure-vaccum pipe when pressure-vaccum is worked, center of gravity is not easy to grasp, and operation seems very inconvenient.

The utility model content

For overcoming the deficiencies in the prior art, the utility model provides that a kind of operation is light and handy, compact conformation, easy to assembly, performance safety, but the lever operated blower of fill order.

The utility model is achieved in that a kind of blower, comprise host shell, be arranged at the motor in the housing, drive the fan of rotation by motor, the switch of control motor rotation, and being connected in host shell blower, aspiration channel, described aspiration channel is provided with a main part along the longitudinal axis extension, and is provided with the kink that is the angle setting with the lengthwise axial line at the main part extending end of aspiration channel; The main part of described aspiration channel and kink angle are set to the obtuse angle.

A kind of blower, comprise host shell, be arranged at the motor in the housing, drive the fan of rotation by motor, the switch of control motor rotation, and be arranged at host shell blower, aspiration channel, described aspiration channel is a bend pipe, described blower is arranged at the outer side-lower of aspiration channel, and its tube wall is near the outer wall of aspiration channel.

A kind of blower, comprise host shell, be arranged at the motor in the housing, drive the fan of rotation by motor, the switch of control motor rotation, and being connected in host shell pressure-vaccum airduct, described pressure-vaccum airduct is provided with a main part along the longitudinal axis extension, and extends the kink that axis is the angle setting with aspiration channel.

Described aspiration channel is fixedlyed connected with blower, and aspiration channel is positioned at the top of blower; Described aspiration channel is consistent with the bearing of trend of blower, and the extending end of described blower is concordant with the crooked place of aspiration channel; Described aspiration channel is connected with blower and host shell are detachable; Safety interlock mechanism is set between described aspiration channel and the host shell, and when aspiration channel was connected in host shell, switch just can be triggered, and had only when switch disconnects, and aspiration channel could be dismantled from host shell.

Described blower is provided with opening, and the blower outer wall of close described aperture position is provided with volume adjusting apparatus; Be provided with the air-out guiding device between described aspiration channel and the blower, be used to guide the airflow direction of selecting from opening; First connecting portion of setting operation handle on the described host shell, described aspiration channel is provided with second connecting portion of operating grip.

Compared with prior art, the beneficial effects of the utility model are: because first connecting portion of operating grip is connected on the host shell, its bearing of trend is consistent with the bearing of trend of pressure-vaccum pipe, and this connecting portion has certain development length, when making the user blow, inhale different working modes in execution to carry out one-handed performance, can select different grip position, for the user of different heights, also can grasp the center of gravity of blower, thereby make operation more laborsaving by selecting different grip position; The pressure-vaccum annex is connected with host shell is detachable, be provided with second connecting portion that grips when installation or removal are provided on the pressure-vaccum annex again, make installation or removal more light, convenient, when blower was in off working state, the dismounting of pressure-vaccum annex and host shell helped the collection of blower and stores simultaneously; Safety interlock mechanism is arranged so that operating characteristics is safer, and curved the tearing open of aspiration channel is arranged so that complete machine weight is lighter and handier, more convenient operation, and pick-up performance is more outstanding.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the front view of the utility model blower.

Fig. 2 is the sectional view of the utility model blower along main apparent direction.

Fig. 3 A be according to Fig. 1 along A-A direction sectional view, this moment, the air quantity governor motion was in closed condition.

Fig. 3 B be according to Fig. 1 along A-A direction sectional view, this moment, the air quantity governor motion was in adjustment state.

Fig. 4 is according to the local enlarged diagram during safety interlock mechanism engagement among Fig. 2.

The schematic diagram of safety interlock mechanism original state when Fig. 4 A is the pressure-vaccum annex of the utility model blower and host shell released state.

Fig. 4 B is the schematic diagram of the pressure-vaccum annex of the utility model blower safety interlock mechanism when being installed and connected in host shell.

Fig. 4 C is the pressure-vaccum annex of the utility model blower switch triggering view when being installed and connected in host shell.

Sectional view when Fig. 5 is the utility model blower host shell and pressure-vaccum annex released state.

Fig. 6 A is the utility model blower manual schematic diagram of operator fill order under suction condition.

Fig. 6 B is the utility model blower manual schematic diagram of operator fill order under the air blowing state.

Wherein:

1, blower 10, pressure-vaccum annex 20, safety interlock mechanism

2, host shell 11, aspiration channel 21, trigger mechanism

2a, motor shell 11a, air intake 21a, contact

2b, volute 12, blower 21b, stop portion

3, motor 12a, air-out 21c, stop portion

4, fan 13, grid opening 22, slide block

5, operating grip 14a, main part 22a, convex shoulder

5a, the first connecting portion 14b, kink 22b, stop portion

5b, second connecting portion 15, dust outlet tube 23, spring

6, lead 16, volume adjusting apparatus 24, locking mechanism

7, switch 17, pressure-vaccum switching mechanism 24a, press section

8, open 17a, control knob 24b, hook

9, air-out guiding device 17b, adjusting turnover panel 25, spring

9a, spigot surface 19, engaging piece X1 (X2), connecting portion axial line

9b, side plate washer Z1, main part axial line Y, axle center of motor line

9c, lagging Z2, kink axial line β, bending angle

The specific embodiment

The utility model has come out with the manual portable blower of a kind of fill order, this pressure-vaccum function is changed between air blowing and air-breathing two kinds of different mode of operations, the operator only need just can realize the pressure-vaccum conversion fast by regulating simply, apace, also can be easily fan and volute be cleared up and safeguarded, and can guarantee that blower can both carry out work blowing, inhale under the mode of operation under safe condition, and it is very convenient to assemble, and structure is light and handy, and is simple to operate.

Referring to Fig. 1, shown in Figure 2, blower 1 is provided with host shell 2, it comprises motor shell 2a that holds motor 3 and the volute 2b that holds fan 4, the impeller of fan 4 has the function of pulverizing to leaf under the rotation at a high speed, motor shell 2a is fixedlyed connected with volute 2b, the rear end of motor shell 2a connects the lead 6 that promising motor 3 provides power supply, and the lower end of volute 6 has connected-dust outlet tube 15, and fan 4 can rotate and produce the pressure-vaccum air-flow at a high speed in volute 2b under the driving effect of motor 3; Pressure-vaccum annex 10 removably connects with host shell 2 by a safety interlock mechanism 20, and pressure-vaccum annex 10 comprises aspiration channel 11 and blower 12, the air intake 11a that is provided with of aspiration channel 11 wherein, and blower 12 is provided with air outlet 12a; The first connecting portion 5a that has connected operating grip 5 on the host shell 2, connect the second connecting portion 5b that is provided with operating grip 5 on the pressure-vaccum annex 10, the first connecting portion 5a is positioned at the top of host shell 2, the second connecting portion 5b is positioned at the top of pressure-vaccum annex 10, when pressure-vaccum annex 10 was connected in host shell 2, two connecting portions were combined into complete operating grip 5.

Be close to the pressure-vaccum switching mechanism 17 of the position setting of dust outlet tube 15 on the main body housing 2, it comprises the control knob 17a that host shell 2 outsides are set, and the adjusting turnover panel 17b that is positioned at host shell 2 inside, the operator is as long as regulate control 17a according to the direction indication that marks, just can make blower blow with the different mode of operation of suction between change.Rotation is regulated turnover panel 17b to solid line position shown in Figure 2, blower 1 is in the blown work pattern, under the high speed rotation of fan 4, the inspiratory airflow of generation shown in arrow among Fig. 2 enters aspiration channel 11 by the air intake 11a of aspiration channel 11, the air-flow that sucks is admitted to blower 12 behind fan 4, blow out in air outlet 12a at last; In order to embody the air velocity that blows out from air outlet 12a under the blow mode, the cross section setting of air outlet 12a is far smaller than the cross section of air intake 11a usually, and the cross section of blower 11 has a process of successively decreasing gradually along its bearing of trend; Rotation is regulated turnover panel 17b to dotted line position shown in Figure 2, and blower 1 is in air-breathing mode, and branches and leaves, dust are same as air intake together with charge air flow one and are inhaled into aspiration channel 11, after the impeller of fan 4 is admitted to dust leg 15 after pulverizing.

In the preferred embodiment of the present utility model, aspiration channel 11 is fixedlyed connected with blower 12, and blower 12 is positioned at the outer side-lower of aspiration channel 11; When blower is in running order, pressure-vaccum annex 10 is connected in host shell 2, aspiration channel 11 extends to fuselage one side with blower 12, and its bearing of trend almost parallel, and the bearing of trend approximate vertical of the bearing of trend of dust outlet tube 15 and aspiration channel 11 and blower 12; Aspiration channel 11 is bend pipes, it is provided with a main part 14a along lengthwise axial line Z 1 extension, and the main part extending end at aspiration channel is provided with the kink 14b that is the angle beta setting with the lengthwise axial line, and the setting of the angle beta of main part 14a axial line Z1 and kink 14b axial line Z 2 is advisable with the obtuse angle between 90 to 180 degree, and the scope that is provided with of the development length of kink 14b is between the 5mm to 1m; The extending end of blower 12 is big, and the aspiration channel 11 that is arranged so that of kink 14b is satisfying under the condition of safe length to roughly concordant with the crooked place of aspiration channel 11, and the whole development length of aspiration channel 11 has reduced, and therefore the weight of complete machine also alleviate; For the blower that aspiration channel is straight tube, the position of centre of gravity of this blower is come to lower, and arm can freely stretch when the user operated in the singlehanded dust suction of the following execution of erectility, operated also more apparent light; The air intake 11a of aspiration channel 11 kink 14b is near ground at this moment, and the air intake 11a of its kink 14b and the air outlet 12a of blower 12 remain in same horizontal plane substantially, with reference to Fig. 6 A, under air-breathing mode, aspiration channel 11 is big to identical with the standoff height h of blower 12 in the vertical directions; Need the place of dust suction, the user easily complete operation of just need not bending over for some as waiting privileged sites under the seat, and the drifting dust effect improves further.Certainly, those skilled in the art it is contemplated that aspiration channel 11 is arranged to the bigger circular arc bend pipe of diameter, blower 12 is positioned at the outer side-lower of aspiration channel 11, its tube wall is near the outer wall of aspiration channel 11, blower 12 also can be arranged to corresponding radian, make that the air intake 11a of aspiration channel 11 and the air outlet 12a of blower 12 remain in same horizontal plane substantially under air-breathing mould gas, promptly aspiration channel 11 is big to identical with the standoff height h of blower 12 in the vertical directions under the dust suction operator scheme.

The top of blower 12 is provided with tube wall opening 8, blower 12 near tube wall opening 8 positions is provided with a wind-speed adjusting device 16, be used under the blowing pattern, regulating the wind speed that blows out from air outlet 12a, also be provided with an air-out guiding device 9 between aspiration channel and the blower 12, be used to guide the flow direction of the air-flow of overflowing from tube wall opening 8, the dirt bits are blowed to the user make its blurred vision or be inhaled in the body in order to avoid select air-flow.

Referring to Fig. 2, shown in Figure 5, the axial line X2 of the axial line X1 of the first connecting portion 5a and the second connecting portion 5b and axle center of motor line Y are positioned at same plane, the bearing of trend of operating grip 5 is consistent with the bearing of trend of pressure-vaccum annex 10 again simultaneously, it is longer that the length of the first connecting portion 5a is provided with the relative second connecting portion 5b, the such setting of the first connecting portion 5a length is to make things convenient for the user no matter blowing, or blow under the mode of operation can fill order's hand operation, for the user of different heights, can select to be fit to the grip position of oneself from the first connecting portion 5a, thereby grasp the center of gravity of blower, it is more light that feasible operation becomes, and the second connecting portion 5b is mainly used in pressure-vaccum annex 10 gripped from main body shell 2 dismounting or when being installed and connected in main body shell 2.

Shown in Fig. 3 A, Fig. 3 B, this wind-speed adjusting device 16 is one to be provided with the ring bodies of grid opening 13, this ring bodies rotatably is supported on the outer wall of blower 12, when needs are regulated the blowing wind speed of blower, regulate cue mark rotation ring bodies according to the air quantity of illustrating among Fig. 1 and make its grid opening 13 and tube wall opening 8 whole crossovers or part crossovers, the part air-flow can be overflowed from grid opening 13 by tube wall opening 8, thereby regulates the air-out velocity magnitude that blows out from blowing mouth 12a; Guiding device 9 comprises the spigot surface 9a that is arranged at 11 times tube walls of aspiration channel, be positioned at directly over the tube wall opening 8 and be distributed in the side plate washer 9b of spigot surface 9a both sides, and the lagging 9c that is positioned at air quantity guiding device 9 rear sides shown in Fig. 2, the air-flow of selecting from grid opening 13 is subjected to stopping of lagging 9c and both sides plate washer 9b, flow to blower 12 bearing of trends along spigot surface 9a, thereby make its flow direction consistent with the blower air-out direction, avoid distinguished and admirable the dirt bits are blowed to the user, also strengthened the blowing effect simultaneously.When not needing to dry the air quantity adjusting, only need by rotation wind-speed adjusting device 16, make its grid opening 13 and 8 dislocation of tube wall opening, this moment, tube wall opening 8 was sealed effectively by the ring bodies of wind-speed adjusting device 16.

With reference to Fig. 4, shown in Figure 5, be provided with the switch 7 that is used to control motor in the host shell, and safety interlock mechanism 20, it comprises the flip flop equipment 21 that relative handle 5 slides and is provided with, the top of this flip flop equipment 21 protrudes in the upper surface of the handle first connecting portion 5a housing, make things convenient for the user shown in arrow among Fig. 4 direction from the primary importance shown in the dotted line to the second place Sliding Control flip flop equipment 21 shown in the solid line, this flip flop equipment 21 comprises contact 21a and 21bc of stop portion and the 21c of stop portion that is used for trigger switch 7, an and locking mechanism 24, this locking mechanism 24 is provided with the press section 24a that protrudes in handle housing, and be used for hook 24b with pressure-vaccum annex 10 engagement, the lower end of locking mechanism 24 is provided with a spring 25, this spring 25 can make locking mechanism 24 move up and down in host shell under the 24a application of force effect of press section, an and slide block 22, the upper end of slide block 22 is provided with a 22b of stop portion, and the middle part is provided with a convex shoulder 22a, and the lower end of slide block 22 is provided with a spring 23 equally; The position that the aspiration channel 11 of pressure-vaccum annex 10 is connected with host shell 2 is provided with an overhanging briquetting 18, and the inboard of overhanging briquetting 18 is provided with one and is used for the engaging piece 19 that is connected with hook 24b.

Shown in Fig. 4 A, when pressure-vaccum annex 10 and main body housing 2 are separated, slide block 22 is being under the supporting role of spring 23 under the original state, and the slide block 22 stop portion 22b sides of this moment and the 21b of stop portion of flip flop equipment 21 offset, and have stoped the slip of flip flop equipment 21; This moment can be by forcing in locking mechanism 24 press section 24a downwards to overcome spring 25 elastic forces, locking mechanism 24 is moved down in host shell, when locking mechanism 24 was in the position that moves down, the hook 24b of locking mechanism 24 can be meshed with the engaging piece 19 of pressure-vaccum annex 10 easily and be connected.

In conjunction with reference to shown in Fig. 4 and Fig. 4 B, when pressure-vaccum annex 10 is installed and connected in host shell 2, the overhanging briquetting 18 of pressure-vaccum annex 10 stretches in the host shell 2, just in time the convex shoulder 22a with slide block 22 interacts, convex shoulder 22a is subjected to the driving of overhanging briquetting 18, impel slide block 22 to overcome the elastic force of spring 23 to lower slider, the 22b of stop portion of slide block 22 and the 21b of stop portion of flip flop equipment 21 throw off mutually at this moment, and then allow flip flop equipment 21 to press the slip of the direction shown in the arrow among the figure by primary importance, thereby actuatable switches 7 starter motors 3, have only when the pressure-vaccum annex is connected in host shell flip flop equipment 21 ability touch switchs; Shown in Fig. 4 C, when flip flop equipment 21 moves to the second place, this moment flip flop equipment 21 contact 21a actuatable switches 7, the 21c of stop portion of flip flop equipment 21 be positioned at locking mechanism 24 press section 24a under, stoped locking mechanism 24 to move down, the hook 24b of locking mechanism 24 and the engaging piece 19 of pressure-vaccum annex 10 are in the engagement lock-out state at this moment, and, as long as when switch 7 is in the triggering state, pressure-vaccum annex 10 just can't be from host shell 2 dismountings, avoid dropping from host shell 2 when the duty because of the pressure-vaccum annex, and make the fan 4 of rotation at a high speed hurt the user, so just guaranteed the safety of blower 1 under the state of motor 3 startup work.Wherein, the inclined-plane is arranged in the upper surface of the 22b of stop portion of slide block 22, be to consider the operator just in case carry out maloperation, promptly not according to normal dismounting mode, earlier flip flop equipment is moved to the primary importance of non-triggering state, and then press locking device 24, take off pressure-vaccum annex 10, and be to use rough power directly pressure-vaccum annex 10 to be dismantled from host shell 2, this moment, slide block 22 meetings upwards be lifted under the effect of spring 23, the 21b of stop portion that the stop portion 22b inclined-plane of slide block 22 will promote trigger mechanism 21 moves to the primary importance of non-triggering state, thereby the work of having cut off motor has effectively kept safety.

When needs with pressure-vaccum annex 10 when host shell 2 is dismantled, as long as slide trigger device 21 is to the primary importance of non-trigger switch, the 21c of stop portion of the press section 24a of locking mechanism 24 and flip flop equipment 21 throws off at this moment, press section 24a can be pressed and move down, be positioned at the hook 24b and engaging piece 19 disengage from of locking mechanism 24, just can like a cork remove pressure-vaccum annex 10 as long as grip 5b by second of operating grip 5 this moment, certainly, pressure-vaccum annex 10 can be disassembled from host shell 2, also favourablely under the situation that volute 2b is stopped up by foreign material such as branches and leaves dirt bits, volute 2b is cleared up convenient maintenance and maintenance to fan 4.

Certainly, if desired, volute 2b and motor shell 2a among the utility model embodiment can make flexible connection, and the power set of drive fan 4 also can substitute with steam engine, internal combustion engine or power brick; Blower 12 also can independently be provided with aspiration channel 11, be connected with host shell respectively, also blower 12 and aspiration channel 11 can be merged the pressure-vaccum airduct that be arranged to single gas channel, and be provided with the main part that extends longitudinally and be the kink that angle is provided with main part in this pressure-vaccum airduct; The above-mentioned pressure-vaccum airduct or the kink body of aspiration channel 12 can be arranged to the body of tabular, cylindrical, taper, trapezoidal or any suitable bending.

Shown in Fig. 6 A, the operator is hold by one hand the blower handle and carries out dust suction work, because the position of centre of gravity of blower is come to relatively low, the arm of operation holding operation handle 5 keeps vertical substantially, the air intake 11a that is positioned at sweep-up pipe 11 kinks is near ground, and outside dirt bits enter sweep-up pipe with charge air flow, are sent into dust bag by fan at last, operating process is very light, and pick-up performance also is improved; Shown in Fig. 6 B, the operator is hold by one hand the blower handle and carries out drifting dust work, before the relative dust suction state of the grip position of operator on operating grip 5 is wanted a bit, the position of centre of gravity of blower is elevated, this moment, operator's arm still kept vertical substantially, the air blowing air-flow blows out from the air outlet 12a of blower 12, is used for dirt bits are blown holding together gather heap, operates to seem free and relaxed.

Claims

1. blower, comprise host shell (2), be arranged at the motor (3) in the housing, drive the fan (4) of rotation by motor, the switch (7) of control motor rotation, and be arranged at host shell aspiration channel (11), blower (12), it is characterized in that: described aspiration channel is provided with the main part (14a) that extends along lengthwise axial line (Z1), and is provided with the kink (14b) that is angle (β) setting with the lengthwise axial line at the main part extending end of aspiration channel.

2. blower according to claim 1 is characterized in that: described kink axial line (Z2) is provided with in obtuse angle with main part axial line (Z1).

3. blower according to claim 1 is characterized in that: the length of described aspiration channel kink (14b) is provided with scope between 5mm to 1m.

4. blower according to claim 3 is characterized in that: described aspiration channel is consistent with the bearing of trend of blower, and described aspiration channel (11) is positioned at the top of blower (12), and the extending end of described blower is concordant with the crooked place of aspiration channel.

5. blower according to claim 4 is characterized in that: described aspiration channel (11) and blower (12) are fixedly connected, the detachable connection between described aspiration channel and blower and the host shell.

6. blower according to claim 5, it is characterized in that: between described aspiration channel (11) and the host shell (2) safety interlock mechanism (20) is set, when aspiration channel is connected in host shell, switch just can be triggered, have only when switch disconnects, aspiration channel could be dismantled from host shell.

7. blower according to claim 6 is characterized in that: described blower (12) is provided with opening (8), and the blower outer wall of close described aperture position is provided with volume adjusting apparatus (16).

8. blower according to claim 7 is characterized in that: be provided with air-out guiding device (9) between described aspiration channel (11) and the blower (12), be used to guide the airflow direction of overflowing from opening.

9. blower according to claim 8 is characterized in that: first connecting portion (5a) of setting operation handle (5) on the described host shell, described aspiration channel is provided with second connecting portion (5b) of operating grip (5).

10. blower, comprise host shell (2), be arranged at the motor (3) in the housing, drive the fan (4) of rotation by motor, the switch (7) of control motor rotation, and be arranged at host shell aspiration channel (11), blower (12), it is characterized in that: described aspiration channel is bend pipe (11), described blower (12) is arranged at the outer side-lower of aspiration channel (11), and its tube wall is near the outer wall of aspiration channel.

11. blower according to claim 10 is characterized in that: described blower (12) is set to bend pipe, and fixedlys connected with aspiration channel (11), the detachable connection between described aspiration channel and blower and the host shell.

12. blower, comprise host shell (2), be arranged at the motor (3) in the housing, drive the fan (4) of rotation by motor, the switch (7) of control motor rotation, and the pressure-vaccum airduct that is connected in host shell, it is characterized in that: described pressure-vaccum airduct is provided with a main part along the extension of lengthwise axial line, and is provided with the kink that is angle (β) setting with the lengthwise axial line at the main part extending end of pressure-vaccum airduct.

13. blower according to claim 12 is characterized in that: the angle of described main part axial line kink axial line is provided with in obtuse angle.