CN106049330A

CN106049330A - Suction machine

Info

Publication number: CN106049330A
Application number: CN201610407053.4A
Authority: CN
Inventors: 杨越
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-11
Filing date: 2016-06-11
Publication date: 2016-10-26
Also published as: WO2017211001A1

Abstract

The invention relates to a suction machine (1). The suction machine (1) comprises a main machine casing (2), a motor (3) arranged in the casing, a fan (4) driven by the motor (3) to rotate, a switch for controlling the motor to rotate, a wind inflow pipe (11), and a wind outflow pipe (12), wherein the wind inflow pipe (11) and the wind outflow pipe (12) are arranged on the main machine casing; the wind inflow pipe (11) is provided with a main body part extending along a lengthwise center line Z1, and a bending part (14b) is arranged at the extending tail end of the main body part of the wind inflow pipe (11), wherein an angle beta is formed between the bending part (14b) and the lengthwise center line.

Description

A kind of blower

Technical field

The present invention relates to a kind of hand-hold operating apparatus, a kind of portable blower.

Background technology

Existing garden class blower, blows, the set-up mode of air draught arm generally has two kinds, and one is connected to host shell Blower, aspiration channel be respectively equipped with independent gas channel, be provided with shifter in housing and can effectively close dust mouth Or inflatable mouth, and from realizing the conversion of blow mode and air-breathing mode；Another kind is only to arrange single gas in pressure-vaccum pipe Circulation road, i.e. blows, inhales that utilize under two kinds of different mode of operations is same gas channel, housing arranges air inlet, logical Crossing certain mechanism and effectively open or close air inlet, blower just can be changed between blow mode and air-breathing mode.

As patent specification that U.S. Patent Bulletin number is US6141823 discloses a kind of blower, its host shell On be respectively provided with blower and aspiration channel, blower and aspiration channel extend in parallel and one connect, blower diameter compares air draught Pipe diameter is big, and aspiration channel diameter is along longitudinally tapering into, and is respectively arranged with insufflation channel and air-breathing in blower and aspiration channel Passage.

For another example U.S. Patent Bulletin number be US6735813 patent specification in disclose a kind of blower, its pressure-vaccum pipe For arranging the pressure-vaccum pipe of single cavity lane, this pressure-vaccum pipe can rotate on the Support Position of this body shell, on its housing Being provided with air inlet, rotate pressure-vaccum pipes by 180 degree, pressure-vaccum pipe can effectively be opened or air inlet on sealing machine shell, thus Achieve and blow, absorb and change.

Above-mentioned the blowing of individual air stream passage, suction pipe are either set, the pressure-vaccum pipe of single gas channel are still set, are growing All it must is fulfilled for certain security regulations in degree design, i.e. blows, the setting of suction pipe to reach certain length standard, the most right In blowing, aspiration channel be all the blower of rectilinear duct, for the length of its pressure-vaccum pipe is often relative to host shell, it appears ratio is lost Adjusting, affect overall appearance, and carry long pressure-vaccum pipe when pressure-vaccum works the not lightest, center of gravity is not easy to grasp, operation Seem very inconvenient.

Summary of the invention

For overcoming the deficiencies in the prior art, the invention provides one and operate light and handy, compact conformation, easy to assembly, performance Safety, can perform the blower of monolever operation.

The present invention is achieved in that a kind of blower, and including host shell, the motor being arranged in housing, by motor Drive rotate fan, control motor rotate switch, and be connected on host shell blower, aspiration channel, described suction Airduct is provided with a main part extended along longitudinal axis, and is provided with and lengthwise axial line at the main part extending end of aspiration channel The kink of angled setting；The main part of described aspiration channel and kink angle are established as obtuse angle.

A kind of blower, including host shell, the motor being arranged in housing, is driven the fan rotated, controls by motor The switch that motor rotates, and it is arranged at host shell blower, aspiration channel, described aspiration channel is bend pipe, described blower Being arranged at the outer side-lower of aspiration channel, its tube wall is against the outer wall of aspiration channel.

A kind of blower, including host shell, the motor being arranged in housing, is driven the fan rotated, controls by motor The switch that motor rotates, and it is connected to host shell pressure-vaccum airduct, described pressure-vaccum airduct is provided with one along longitudinal axis extension Main part, and extend the kink of the angled setting of axis with aspiration channel.

Described aspiration channel is fixing with blower to be connected, and aspiration channel is positioned at the top of blower；Described aspiration channel and blower Bearing of trend consistent, the extension end of described blower is concordant with the crooked place of aspiration channel；Described aspiration channel and blower Can the bridge formula of unloading be connected with host shell；The safety interlock that arranges between this aspiration channel and host shell, when aspiration channel connects When host shell, switch just can be triggered, and the most when the switches are opened, aspiration channel could be dismantled from host shell.

Described blower is provided with opening, and the blower outer wall near described aperture position is provided with volume adjusting apparatus； Air-out guider it is provided with, for guiding the airflow direction selected from opening between described aspiration channel and blower；Described master First connecting portion of operation handle is set on casing body, described aspiration channel is provided with the second connecting portion of operation handle.

Compared with prior art, the invention has the beneficial effects as follows: owing to the first connecting portion of operation handle is connected to main frame On housing, its bearing of trend is consistent with the bearing of trend of pressure-vaccum pipe, and this connecting portion has certain development length so that make User performing to blow, inhales different working modes when carrying out one-handed performance, optional different grip position, for difference heights For user, it is also possible to by selecting different grip position to grasp the center of gravity of blower, so that operation is more laborsaving；Pressure-vaccum Adnexa is detachable with host shell to be connected, and pressure-vaccum adnexa is provided with again the second connection gripped when providing installation or removal Portion so that it is the lightest, convenient to install or remove, simultaneously when blower is in off working state, pressure-vaccum adnexa and main case The dismounting of body is conducive to the collection of blower and stores；The setting of safety interlock makes operating characteristics Zhi Anquan, aspiration channel Bending to arrange the weight that makes to pick lighter and handier, more convenient operation, pick-up performance is more prominent.

Accompanying drawing explanation

The invention will be further described with embodiment below in conjunction with the accompanying drawings.

Fig. 1 is the front view of blower of the present invention.

Fig. 2 is the blower of the present invention sectional view along main apparent direction.

Fig. 3 A is that now air quantity adjusting mechanism is closed along A-A direction sectional view according to Fig. 1.

Fig. 3 B is that now air quantity adjusting mechanism is in adjustment state along A-A direction sectional view according to Fig. 1.

Fig. 4 is according to close-up schematic view during safety interlock engagement in Fig. 2.

Fig. 4 A is pressure-vaccum adnexa and safety interlock original state during host shell released state of blower of the present invention Schematic diagram.

Fig. 4 B is the pressure-vaccum adnexa of the blower of the present invention schematic diagram of safety interlock when being installed and connected in host shell.

Fig. 4 C is the pressure-vaccum adnexa of blower of the present invention switch triggering view when being installed and connected in host shell.

Fig. 5 is blower host shell of the present invention and portion's view during pressure-vaccum adnexa released state.

Fig. 6 A is that blower of the present invention performs the schematic diagram of one-handed performance in suction condition operator.

Fig. 6 B is that blower of the present invention performs the schematic diagram of one-handed performance in air blowing state operator.

Wherein:

1, blower 10, pressure-vaccum adnexa 20, safety interlock

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

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

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

3, motor 12a, air outlet 21c, stop portion

4, fan 13, grid opening 22, slide block

5, operation handle 14a, main part 22a, convex shoulder

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

5b, the first connecting portion 15, dust outlet tube 23, spring

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

7, switch 17, pressure-vaccum shifter 24a, press section

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

9, air-out guider 17b, regulation 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

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described in detail, but the scope of the present invention is not limited to following example.

The present invention has come out with a kind of portable blower performing one-handed performance, and this pressure-vaccum function is being blown and air-breathing Between two kinds of different mode of operations change, operator have only to by simply and rapidly regulate just can quickly realize pressure-vaccum change, Easily fan and volute can also be cleared up and safeguard, and ensure that blower blowing, inhaling can under mode of operation It is operated in the secure state, and assembles extremely convenient, light structure, simple to operate.

Seeing shown in Fig. 1, Fig. 2, blower 1 is provided with host shell 2, it include accommodate motor 3 motor shell 2a and Accommodating the volute 2b of fan 4, the impeller of fan 4 has the function of pulverizing, motor shell 2a and whirlpool under high speed rotating to leaves Shell 2b is fixing to be connected, and the rear end of motor shell 2a connects promising motor 3 provides the wire 6 of power supply, and the lower end of volute 6 is connected to one Dust outlet tube 15, fan 4 can under the driving effect of motor 3 high speed rotating and in volute 2b produce Push-pull Flow；Pressure-vaccum adnexa 10 are removably connected with host shell 2 by a safety interlock 20, and pressure-vaccum adnexa 10 includes aspiration channel 11 and blower 12, wherein aspiration channel 11 is provided with air inlet 11a, and blower 12 is provided with air outlet 12a；It is connected to operation on host shell 2 First connecting portion 5a of handle 5, pressure-vaccum adnexa 10 connects the second connecting portion 5b being provided with operation handle 5, the first connecting portion 5a is positioned at the top of host shell 2, and the second connecting portion 5b is positioned at the top of pressure-vaccum adnexa 10, when pressure-vaccum adnexa 10 is connected to main frame During housing 2, two connecting portions are combined into complete operation handle 5.

The pressure-vaccum shifter 17 arranged close to the position of dust outlet tube 15 in main body housing 2, it includes being arranged on master Control knob 17a outside casing body 2, and it is positioned at the regulation turnover panel 17b within host shell 2, as long as operator is according to marking Direction indication be adjusted controlling 17a, blower just can be made to change between different mode of operations from inhaling blowing.Rotate Regulation solid line position shown in turnover panel 17b to Fig. 2, blower l is in blown work pattern, under the high speed rotating of fan 4, produces Raw inspiratory airflow as shown by the arrows in Figure 2 goes out the air inlet 11a of aspiration channel 11 and enters aspiration channel 11, and the air-flow of suction is through fan It is admitted to blower 12 after 4, finally blows out in air outlet 12a；In order to embody the gas from air outlet 12a blowout under blow mode Flow Velocity, the cross section of usual air outlet 12a arranges the cross section being far smaller than air inlet 11a, and blower 11 is transversal Face extends along direction a process gradually successively decreased；Rotate regulation dotted line position shown in turnover panel 17b to Fig. 2, blower l Being in air-breathing mode, branch and leaf, dust are same as air inlet together with charge air flow one and are inhaled into aspiration channel 11, by the impeller of fan 4 Dust leg 15 it is admitted to after pulverizing.

In the preferred embodiments of the present invention, aspiration channel 11 is fixing with blower 12 to be connected, and blower 12 is positioned at air draught 11 Outer side-lower；When blower is in running order, pressure-vaccum adnexa 10 is connected to host shell 2, aspiration channel 11 and blower 12 extend to fuselage side, and its bearing of trend is almost parallel, and the bearing of trend of dust outlet tube 15 and aspiration channel 11 and blower The bearing of trend of 12 is substantially vertical；Aspiration channel 11 is a bend pipe, and it is provided with a main part 14a extended along lengthwise axial line Z1, And the main part extending end of aspiration channel is provided with the kink 14b that β angled with lengthwise axial line is arranged, and main part The setting of the angle beta of 14a axial line Z1 and kink 14b axial line Z2 is advisable with the obtuse angle between 90 to 180 degree, and kink The scope that arranges of the development length of l4b is between 5mm to 1m；The extending end of blower 12 is big with the crooked place of aspiration channel 11 Causing concordant, the setting of kink 14b makes aspiration channel 11 under conditions of meeting safe length, and the overall of aspiration channel 11 extends length Degree reduces, and the most therefore the weight of complete machine alleviate；For the blower that aspiration channel is straight tube, the center of gravity position of this blower Putting and come to relatively low, when user performs singlehanded cleaning operation under erectility, arm can freely stretch, operate the most aobvious gently Pine；Now the air inlet 11a of aspiration channel 11 kink 14b is near ground, and the air inlet 11a of its kink 14b and blowing The air outlet 12a of pipe 12 is held in same level substantially, with reference to Fig. 6 A, under air-breathing mode, and aspiration channel 11 and blower 12 Standoff height h of in the vertical direction is roughly the same；For some as waited privileged sites to need the place of dust suction under seat, make User is not required to bend over just can be easily accomplished operation, and drifting dust effect improves further.Certainly, those skilled in the art is permissible Aspiration channel 11 is arranged to the circular arc bend pipe being relatively large in diameter by imagination, and blower 12 is positioned at the outer side-lower of aspiration channel 11, its pipe Wall can also be arranged to corresponding radian against the outer wall of aspiration channel 11, blower 12 so that aspiration channel 11 under air-breathing mould gas The air outlet 12a of air inlet 11a and blower 12 be substantially held in same level, i.e. aspiration channel under cleaning operation pattern 11 with blower 12 vertically to open standoff height h upwards roughly the same.

The top of blower 12 is provided with tube wall opening 8, is being provided with a wind on the blower 12 of tube wall opening 8 position Velocity modulation regulating device 16, for regulating the wind speed of the blowout from air outlet 12a, between aspiration channel and blower 12 under blowing pattern It is also provided with an air-out guider 9, for guiding the flow direction of the air-flow from tube wall opening 8 effusion, in order to avoid air escape Dust blows to user make its blurred vision or be inhaled into internal.

See shown in Fig. 2, Fig. 5, the axial line Xl and the axial line X2 of the second connecting portion 5b of the first connecting portion 5a and motor Axial line Y is generally aligned in the same plane, and the bearing of trend of operation handle 5 is consistent with the bearing of trend of pressure-vaccum adnexa 10 again simultaneously, and first It is longer that the length that connecting portion is cut arranges relative second connecting portion 5b, and the first connecting portion such setting of 5a length is to facilitate user No matter under blowing or inhale mode of operation, can carry out one-handed performance, for the user of different heights, can from first even Connect the grip position selecting to be suitable for oneself on portion 5a, thus grasp the center of gravity of blower so that operation becomes the lightest, and the Two connecting portion 5b grip when being mainly used in being dismantled from main body shell 2 by pressure-vaccum adnexa 10 or being installed and connected in main body shell 2.

With reference to shown in Fig. 3 A, Fig. 3 B, this wind-speed adjusting device 16 is a ring bodies being provided with grid opening 13, this ring bodies It is rotatably supported on the outer wall of blower 12, when needing the blowing wind speed regulating blower, according to the wind of signal in Fig. 1 Amount regulation cue mark rotating annular body makes its grid opening 13 and the whole crossover of tube wall opening 8 or part crossover, fraction Can be escaped from grid opening 13 by tube wall opening 8, thus regulation is from the air-out velocity magnitude of blowing mouth 12a blowout；Guide dress Put the 9 spigot surface 9a including being arranged at 11 times tube walls of aspiration channel, be positioned at directly over tube wall opening 8 and be distributed in spigot surface 9a both sides Side plate washer 9b, and the lagging 9c being positioned on rear side of air flow guide device 9 shown in Fig. 2, from grid opening 13 effusion Air-flow is stopped by lagging 9c and both sides plate washer 9b, flows along spigot surface 9a to blower 12 bearing of trend, thus Make its flow direction consistent with blower air-out direction, it is to avoid the distinguished and admirable user that dust blowed to, the most also strengthen blowing effect Really.When being made without blowing air quantity regulation, it is only necessary to by rotating wind-speed adjusting device 16 so that it is grid opening 13 and pipe Wall opening 8 misplaces, and now tube wall opening 8 is closed effectively by the ring bodies of wind-speed adjusting device 16.

With reference to shown in Fig. 4, Fig. 5, in host shell, it is provided with the switch 7 for controlling motor, and safety interlock 20, it includes the triggering device 21 that opposite handle 5 slip is arranged, and the top of this triggering device 21 protrudes from handle the first connecting portion The upper surface of 5a housing, facilitates user direction as shown by the arrows in Figure 4 from the primary importance shown in dotted line to shown in solid Second position Sliding Control triggers device 21, and this triggering device 21 includes the contact 21a for triggering switch 7 and stop portion 21bc and stop portion 21c, and a locking mechanism 24, this locking mechanism 24 is provided with the press section 24a protruding from handle housing, And for the hook 24b that engages with pressure-vaccum adnexa 10, the lower end of locking mechanism 24 is provided with a spring 25, this spring 25 can be Locking mechanism 24 is made to move up and down in host shell under the 24a force effect of press section, and a slide block 22, the upper end of slide block 22 Arranging a stop portion 22b, middle part arranges a convex shoulder 22a, and the lower end of slide block 22 is provided with a spring 23 equally；Pressure-vaccum adnexa 10 The position that is connected with host shell 2 of stock airduct 11 one overhanging briquetting 18 is set, the inner side of overhanging briquetting 18 arrange one for The engaging piece 19 being connected with hook 24b.

With reference to shown in Fig. 4 A, when pressure-vaccum adnexa 10 is separated with main body housing 2, slide block 22 is in the supporting role of spring 23 Under be under original state, 22b side, slide block 22 stop portion now and trigger device 21 stop portion 21b offset, prevent Trigger the slip of device 21: now can by under force in locking mechanism 24 press section 24a to overcome spring 25 elastic force, make Locking mechanism 24 moves down in host shell, when locking mechanism 24 is in the position moved down, and the hook of locking mechanism 24 24b can be meshed with the engaging piece 19 of pressure-vaccum adnexa 10 easily and be connected.

In conjunction with reference to shown in Fig. 4 and Fig. 4 B, when pressure-vaccum adnexa 10 is installed and connected in host shell 2, pressure-vaccum adnexa 10 Overhanging briquetting 18 stretches in host shell 2, and just the convex shoulder 22a with slide block 22 interacts, and convex shoulder 22a is by overhanging briquetting The driving of 18, promotes slide block 22 to overcome the elastic force slide downward of spring 23, now the stop portion 22b of slide block 22 and triggering device The stop portion 21b of 21 mutually disengages, and allows for triggering device 21 and is slided by primary importance direction as shown in arrow in figure, from And actuate switch 7 startup motor 3, only when pressure-vaccum adnexa is connected to host shell, triggering device 21 could touch switch；Ginseng According to shown in Fig. 4 C, when triggering device 21 and moving to the second position, the contact 21a now triggering device 21 actuates switch 7, triggers The stop portion 21c of device 21 is positioned at the underface of locking mechanism 24 press section 24a, prevents locking mechanism 24 to move down, this Time the hook 24b of locking mechanism 24 be in the engaging piece 19 of pressure-vaccum adnexa 10 and engage lock-out state, and, as long as when switch 7 Being in triggering state, pressure-vaccum adnexa 10 just cannot be dismantled from host shell 2, it is to avoid because of pressure-vaccum adnexa when the duty from master Drop on casing body 2, and make the fan 4 of high speed rotating hurt user, this ensures that there blower l and start at motor 3 Safety under the state of work.Wherein, the upper surface of the stop portion 22b of slide block 22 is arranged to inclined-plane, allows for operator ten thousand One performs maloperation, i.e. not in accordance with dismantling mode normally, first moves the primary importance to non-toggle state by triggering device, Press locking device 24 the most again, take off pressure-vaccum adnexa 10, but use brute-force directly by pressure-vaccum adnexa 10 from host shell 2 Dismounting, now slide block 22 can be lifted up under the effect of spring 23, and the 22b inclined-plane, stop portion of slide block 22 will promote trigger mechanism The stop portion 21b of 21 moves to the primary importance of non-toggle state, thus the work having effectively cut off motor maintains safety.

When pressure-vaccum adnexa 10 is dismantled from host shell 2 by needs, if slide trigger device 21 to non-toggle switch Primary importance, now the press section 24a of locking mechanism 24 with trigger device 21 stop portion 21c disengage, press section 24a is permissible Being pressed and move down, the hook 24b being positioned at locking mechanism 24 is disengaged with engaging piece 19, as long as now passing through manipulator Second gripping 5b of handle 5 just can easily remove pressure-vaccum adnexa 10, and certainly, pressure-vaccum adnexa 10 can be by from host shell 2 Dismounting, also favorably clears up volute 2b in the case of volute 2b is by foreign material blockings such as branch and leaf dust, convenient to fan 4 Safeguard and maintenance.

Of course, if required, volute 2b and the motor shell 2a in the embodiment of the present invention all can make and be flexibly connected, drive The power set of wind symptom fan 4 can also substitute with steam engine, internal combustion engine or battery bag；Blower 12 is with aspiration channel 11 also Can be independently arranged, be connected with host shell respectively, it is also possible to blower 12 be merged with aspiration channel 11 and is arranged to single gas The pressure-vaccum airduct of circulation road, and on this pressure-vaccum airduct, be provided with the main part extended longitudinally and angled with main part set The kink put；Above-mentioned pressure-vaccum airduct or the kink body of aspiration channel 12 can be set to flat, figure cylindricality, taper, ladder Shape or the body of any bending being suitable for.

With further reference to shown in Fig. 6 A, operator is hold by one hand blower handle and carries out dust suction work, due to blower Position of centre of gravity is come to relatively low, and the arm of operation holding operation handle 5 keeps vertical substantially, is positioned at sweep-up pipe 11 kink Air inlet 11a is near ground, and outside dust enters sweep-up pipe with charge air flow, is finally sent into dust bag by fan, operated Cheng Jiwei is light, and pick-up performance is also improved；With reference to shown in Fig. 6 B, operator is hold by one hand blower handle and carries out drifting dust work Making, operator's grip position on operation handle 5 wants former point relative to dust suction state, and the position of centre of gravity of blower is elevated, Now the arm of operator keeps vertically the most substantially, and air blowing air-flow blows out from the air outlet 12a of blower 12, for by dust Blowing poly-heap, operation seems free and relaxed.

Claims

1. a blower, including host shell (2), the motor being arranged in housing (3), is driven the fan rotated by motor (4), control the switch (7) that motor rotates, and be arranged at host shell aspiration channel (11), blower (12), it is characterised in that: Described aspiration channel is provided with the main part (14a) extended along lengthwise axial line (Z1), and extends end at the main part of aspiration channel and set It is equipped with the kink (14b) that angled with lengthwise axial line (β) is arranged.

Blower the most according to claim 1, it is characterised in that: described kink axial line (Z2) and main part axial line (Z1) arrange in obtuse angle.

Blower the most according to claim 1, it is characterised in that: the length of described aspiration channel kink (14b) arranges model It is trapped among between 5mm to 1m.

Blower the most according to claim 3, it is characterised 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), the extension end of described blower is put down with the crooked place of aspiration channel Together.

Blower the most according to claim 4, it is characterised in that: described aspiration channel (11) and blower (12) are fixing even Connect, detachable between described aspiration channel and blower with host shell be connected.

Blower the most according to claim 5, it is characterised in that: set between described aspiration channel (11) and host shell (2) Putting safety interlock (20), when aspiration channel is connected to host shell, switch just can be triggered, the most when the switches are opened, Aspiration channel could be dismantled from host shell.

7. select according to the blower described in claim 6, it is characterised in that: described blower (12) is provided with opening (8), near institute The blower outer wall stating aperture position is provided with volume adjusting apparatus (16).

Blower the most according to claim 7, it is characterised in that: set between described aspiration channel (11) and blower (12) There is air-out guider (9), for guiding the airflow direction from opening effusion, reached host shell arranges operation handle (5) The first connecting portion (5a), described aspiration channel is provided with operation handle (5) the second connecting portion (5b).

9. a blower, including host shell (2), the motor being arranged in housing (3), is driven the fan rotated by motor (4), control the switch (7) that motor rotates, and be arranged at host shell aspiration channel (11), blower (12), it is characterised in that: Described aspiration channel is bend pipe (11), and described blower (12) is arranged at the outer side-lower of aspiration channel (11), and its tube wall is against suction The outer wall of airduct, described blower (12) is set to bend pipe, and fixing with aspiration channel (11) is connected, described aspiration channel and blowing Manage be connected detachable with between host shell.

10. a blower, including host shell (2), the motor being arranged in housing (3), is driven the fan rotated by motor (4), control the switch (7) that motor rotates, and be connected to the pressure-vaccum airduct of host shell, it is characterised in that: described air sucking/blowing Pipe is provided with a main part extended along lengthwise axial line, and is provided with and lengthwise axle center at the main part extending end of pressure-vaccum airduct The kink that line angled (β) is arranged, the angle of described main part axial line kink axial line is arranged in obtuse angle.