CN100504220C

CN100504220C - Exhaust fan assembly having flexible coupling

Info

Publication number: CN100504220C
Application number: CN 200580006160
Authority: CN
Inventors: M·G·塞林格; T·L·贺迪纳; S·J·寇厄佩尔
Original assignee: Greenheck Fan Corp
Current assignee: Greenheck Fan Corp
Priority date: 2004-01-20
Filing date: 2005-01-19
Publication date: 2009-06-24
Anticipated expiration: 2025-01-19
Also published as: CN101065618A; CN1926384A; CN101018947B; CN101133285A; CN101018947A

Abstract

An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a drive chamber and surrounding annular space. A fan driven by a motor whose shaft extends downward from the drive chamber draws exhaust air from the plenum and blows it up through the annular space to a nozzle at the top of the fan assembly. The motor is pivotally mounted inside the assembly to provide access to the motor components when it is desired to perform inspection and maintenance.

Description

Exhaust fan assembly with elastic coupling

The cross reference of related application

This is the U.S. Patent application of submitting on August 24th, 2,004 10/924, a part of renewal application of 532, and require the U.S. Provisional Application 60/537 submitted on January 20th, 2004,609 priority, also require the U.S. Provisional Application 60/588 of submission on July 15th, 2004,074 priority, these two parts of applications have been incorporated into this to do reference in full with it.

Technical field

The present invention relates generally to scavenger fan, relate in particular to such scavenger fan: this scavenger fan will be extracted out in one or more fume hoods of contaminated air from be distributed in whole building building, contaminated air is mixed with surrounding air with the dilution pollutant, then the air after diluted is discharged in the external environment from building.

Many dissimilar gas extraction system that are used for building are arranged.In many these type systematics, their purpose nearly all is effectively air to be extracted out in building.In the building such as the laboratory, chemistry and bioprocess technology can produce smog, and these smog have niff and are poisonous and hazardous.A kind of scheme is that they are discharged by a higher exhaust chimney, and this root chimney is discharged to ground out and away with smog and more than the roof height.Yet such exhaust chimney involves great expense and is not attractive in appearance.

Another kind of scheme is that smog and fresh air are mixed mutually to dilute contaminated air, then the air after diluted is discharged at a high speed from the top of building.So, waste gas is diluted and be blown to the eminence of building top.The example of such system is at United States Patent (USP) 4,806, discloses to some extent in 076,5,439,349 and 6,112,850.

In these systems, United States Patent (USP) 4,806,076 has disclosed a kind of system, wherein a fan motor has a motor reel that is directly connected in a fan, and this fan has all rotating vanes that waste gas can be extracted and waste gas is upwards blown into out surrounding environment from building.Unfortunately, all bearings of supporting motor axle absorb the thrust loading that fan is applied in the course of the work in motor, have increased the wearing and tearing of motor thus.In addition, because the interface between motor reel and the fan is arranged in the zone that the course of work is admitted waste gas, therefore, when will with motor reel when fan be pulled down, just needing the people and enter the polluted zone of contaminated thing in the maintenance work.

Therefore, people need a kind of building exhaust system, and this system comprises a building exhaust chimney that is connected in a fan, and this system can solve the shortcoming of legacy system.

Summary of the invention

According to an aspect of the present invention, a kind of combination of fans part is configured to contaminated air is discharged from building.This combination of fans part comprises an outer wall, forms a chamber in this outer wall, and has an air intlet in the bottom of this outer wall.This air intlet receives contaminated air.One inwall be anchored on outer wall and be arranged in chamber with it is divided into the isolated center cavity of contaminated air and receive contaminated air one around annular space.One fan is arranged in center cavity and links to each other with a fan shaft, thereby upwards blows out through annular space through air intlet suction waste gas and with it.One motor mounting and has a motor reel of drive fan axle in center cavity.One hookup is arranged in center cavity and fan shaft is linked to each other with motor reel.

According to another aspect of the present invention, an exhaust assembly is installed on the top of a building, is used for the polluted air from one or more building waste gas ventilating openings is discharged.This exhaust assembly comprises: an air intlet, and this air intlet receives contaminated air; At least one surrounding air entrainment zone, it mixes surrounding air and contaminated air mutually to generate the air of dilution.One fan chamber accommodates a fan, and this fan is linked in a fan shaft to blow towards the direction of air outlet slit through air intlet suction waste gas and with its edge.Also be provided with an actuator chamber.This actuator chamber and waste gas are isolated and maintain a motor, and this motor has to operate and is used for a motor reel of drive fan axle and the hookup that fan shaft is linked to each other with motor reel.

According to a further aspect of the invention, provide a kind of setting to be used for exhaust assembly that waste gas is discharged from a building.This exhaust assembly comprises a housing, and this housing is formed with an entrance point that receives waste gas and the port of export that waste gas is discharged.This housing forms a fan chamber and an actuator chamber isolated with waste gas.One fan is arranged in fan chamber and is connected in a fan shaft being rotated, thereby through inlet suction waste gas and along the direction direct exhaust towards outlet.One motor mounting is in actuator chamber, and this motor comprises a motor reel that is linked in fan shaft by a hookup that is arranged in actuator chamber.At least one passage extends through housing, and this passage makes the people can arrive motor and hookup.

In the following description with reference to the accompanying drawings, these accompanying drawings form the part of this description and by illustrative but not determinate mode demonstrates a preferred embodiment of the present invention.Such embodiment does not limit scope of the present invention yet, determine that scope of the present invention must see the content of claim.

Description of drawings

Thus accompanying drawing is carried out reference, the corresponding components identical of identical label in these accompanying drawings, in these accompanying drawings:

Fig. 1 is a constructure ventilation system schematic perspective view of constructed according to the principles of the present invention;

Fig. 2 is the side view according to an exhaust assembly of preferred embodiment structure;

Fig. 3 A is the stereogram of forced air-ventilating system that forms the part of exhaust fan assembly shown in Figure 2, wherein part split except;

Fig. 3 B is the three-dimensional exploded view of forced air-ventilating system shown in Fig. 3 A;

Fig. 3 C is the side exploded view of forced air-ventilating system shown in Fig. 3 A, wherein part split except;

Fig. 4 is the stereogram of two forced air-ventilating systems of installing side by side;

Fig. 5 is the side cross-sectional view of exhaust assembly shown in Figure 2;

Fig. 6 is the three-dimensional exploded view of combination of fans part shown in Figure 5;

Fig. 7 is the amplification side cross-sectional view that is similar to Fig. 5, and different shows the fan motor that is in a pivot position;

Fig. 8 is partly dissectd, the partial view of combination of fans part shown in Figure 5;

Fig. 9 is the cross-sectional view that obtains along the plane 9-9 among Fig. 5;

Figure 10 is the stereogram of hookup shown in Figure 5;

Figure 11 is the cross sectional elevation of hookup shown in Figure 10;

Figure 12 is the cross sectional elevation of hookup shown in Figure 11, but this hookup is in a bending position;

Figure 13 is the cross sectional elevation that is similar to Fig. 7, but shown be the motor of installing according to another embodiment;

Figure 14 is the cross-sectional view that obtains along the plane 14-14 among Fig. 5;

Figure 15 is the cross-sectional view that obtains along the plane 15-15 among Fig. 5;

Figure 16 is the cross-sectional view that obtains along the plane 16-16 among Fig. 5;

Figure 17 shows the schematic diagram of the combination of fans part of the parameter that determines desired performance;

Figure 18 is the diagram of second embodiment of the local exhaust assembly of the present invention that is dissectd; And

Figure 19 is the front view of exhaust assembly shown in Figure 180.

The specific embodiment

At first referring to Fig. 1, one constructure ventilation system 20 comprises one or more fume hoods 22, and this fume hood is installed in kitchen, laboratory, manufacturing equipment or other meeting in a whole building of managing usefulness generate harmful gas that maybe will be discharged from from this building suitable position usually.Specifically, each fume hood 22 is formed with a chamber 28, this chamber in the open front of fume hood to receive ambient air.The upper end of this chamber 28 links to each other with the lower end that extends up to a pipeline 32 of a house steward 34 from fume hood 22.House steward 34 further links to each other with a tedge 38 of other upper surface that extends up to roof 40 or building.The upper end of this tedge 38 then be installed in roof 40 on and the exhaust fan assembly 42 that extends upward so that gas is discharged from building link to each other.

Referring to Fig. 2, exhaust assembly 42 comprises a forced air-ventilating system 44 of the base portion that is positioned at sub-assembly again, and this forced air-ventilating system receives mixes with fresh air from the waste gas of tedge 38 and with it.One combination of fans part 46 is connected in forced air-ventilating system 44 and extends upward from it.Combination of fans part 46 comprises a blast fan, and this blast fan is upwards extracted waste gas out and discharged by the wind cover 52 that is positioned at its upper end by forced air-ventilating system 44.Below each assembly is described in detail.In operating process, exhaust assembly 42 is extracted one air-flow from each connected fume hood 22 out, makes it through chamber 28, pipeline 32, house steward 34, tedge 38 and forced air-ventilating system 44.The air of this discharge mixed with ozone before upwards discharging at a high speed mutually at the top through wind cover 52.

Control to this system generally includes machinery and electronic control component.One traditional windscreen 36 be arranged in pipeline 32 a little more than the position of each fume hood 22 and between an orientation of opening fully (as shown in the figure) and an orientation of closing fully by self actuating, thereby control flows to the waste gas stream of chamber 28.Like this, just can control the air capacity of discharging by each fume hood 22.

Building can be equipped with more than one exhaust fan assembly 42, and each such sub-assembly 42 is operably connected to independent one group of a plurality of fume hood 22 or is connected in house steward 34.Therefore, each exhaust fan assembly 42 can be born the task that the specific region of pernicious gas from building 26 discharged, and perhaps a plurality of exhaust fan assemblies 42 can carry out work by front and back in proper order on same house steward 34.In addition, house steward 34 can be connected in total exhaust chamber in the building 26.Can use an electronic control system (not shown) to come the work of control system.

As being clearly shown that among Fig. 3 A, B and the C, forced air-ventilating system 44 comprises a rectangular case that is formed by four vertical walls 64 and roof 66.Rectangular base 68 is fastened on the roof 66 and the removably fastening combination of fans part 46 thereon of supporting.All four walls 64 all are configured identical panel 70, can optionally remove these panels so that forced air-ventilating system 44 towards any required direction.When a panel 70 is removed, on the wall 64 of forced air-ventilating system, just form bigger opening.On a sidewall 64, pull down panel 70 and be connected with the front portion of fan housing 72 with formation.

Fan housing 72 stretches out from housing and thinks that forced air-ventilating system 44 provides a bypass air intlet 74.Fan housing 72 stretches out and a downward-sloping subsequently rain cover 82 forms by a pair of isolated vertical wall 69, diapire 79 with from the outside level of housing.One flange that turns to 84 is formed on the dripping eaves of rain cover 82 to prevent that water from splashing in the bypass gas flow.

One windscreen 86 is installed under the fan housing 72 amount of surrounding air that enters the housing of forced air-ventilating system with control through bypass air inlet 74.It comprises all windscreen blades, these windscreen blades are subjected to electronics or pneumatic control so that one bypass air enters forced air-ventilating system 44, this can keep flowing into the air stream total amount of combination of fans part 46 constant and no matter the variation of the air capacity of from building, discharging how.Enter forced air-ventilating system 44 through an exhaust gas inlet 88 of the bottom that is formed on rectangular case and mixes with bypass air producing the waste gas of disposable dilution from the waste gas of building, this waste gas is gone forward side by side into fan sub-assembly 46 by the waste gas outlet 90 in the top of base 68 by extraction upwards.

As clearly illustrating among Fig. 3 B and the 3C, isolated windscreen 92 is slidably mounted in the base 68 just under waste gas outlet 90.Isolated windscreen 92 is supported by the flange 89 that the inside around base 68 forms, and puts in place by the antetheca slip of base.Isolated windscreen 92 is the outdoor surrounding airs that are used for when fan is not the worked isolated combination of fans part 46 of flowing through downwards.Isolated windscreen 92 has all blades, and these blades rotate or rotated when fan is not worked windscreen is closed by a rotating shaft by means of gravity, revolution.By making fan housing 72 throw off and make isolated windscreen 92 skid off base 68, can pull down to check or to repair completely cutting off windscreen 92 easily from forced air-ventilating system 44.

As clearly illustrating among Fig. 4, the dismountable all panels 70 on forced air-ventilating system 44 sidepieces also make a plurality of forced air-ventilating systems 44 combine with a single tedge 38.In this structure, forced air-ventilating system 44 is installed adjacent to each other, and all panels 70 in the wall 64 of all adjacency are removed to form the chamber 95 that the housing combined by them is formed single, amplify between them.The forced air-ventilating system 44 of any amount can be combined in this way and can be towards neatly it being finished, and the position of their fan housing 72 is provided by identical detachable panel 70 and the installing hole on all four walls 64 of forced air-ventilating system 44.

Specifically referring to Fig. 2, combination of fans part 46 is removably mounted on the top of forced air-ventilating system 44.Combination of fans part 46 has a rectangular susceptor plate 97, and this base plate has the edge that extends along the top snug fit of rectangular base 68 downwards.All securing members are connected in the top of base 68 with this edge, by these securing members are pulled down, whole fan sub-assembly 46 can be pulled down being used for and repair or check.

All detachable panels 70 also make the people can in any direction arrive the inside of forced air-ventilating system 44.Like this, do not need whole exhaust fan assembly 42 pulled down or combination of fans part 46 just pulled down from forced air-ventilating system 44 from tedge 38 to carry out daily maintenance and repair.In addition, in many devices, through one of all sidewalls 64 of forced air-ventilating system 44 but not the waste gas of building is brought in the forced air-ventilating system 44 is favourable in the bottom.In such device, suitable panel 70 is pulled down the exhaust gas inlet of leading to forced air-ventilating system 44 with formation, and the bottom of forced air-ventilating system housing is closed by a diapire (not illustrating in the drawings).

Specifically referring to Fig. 5,6 and 8, combination of fans part 46 is seated in the top of forced air-ventilating system 44 and comprises a cylindrical outer wall 100 that is welded in a rectangular susceptor plate 102.One group eight gusset 104 around the welding of the lower end of outer wall 100 to help that it is bearing in vertically upward a position.Be bearing in outer wall 100 inside be a cylinder shape inner wall 106, this inwall is divided into three parts with outer wall 100 formed chambers: a centre-driven chamber 108, the annular space 110 and around one between inside and

outside wall

106 and 100 are positioned at the fan chamber 112 below the actuator chamber 108.This fan chamber 112 and annular space 110 form the part of building waste gas runner, and actuator chamber 108 is isolated with runner, can not be exposed to the entrained pollutant of waste gas thus.

One fan shaft 114 is arranged in actuator chamber 108 and advantageously rotatably is anchored on a base plate 116 of the bottom that is welded on inwall 106 by a single supporting 118.Fan shaft 114 extends into fan chamber 112 downwards with end bearing one blast fan 120 under it, and extends upward into actuator chamber 108, and it is connected in a motor reel 152 by an elastic coupler of being obedient to 122 in actuator chamber 108.This hookup can compensate at least one direction, be preferably the dislocation of the axle of both direction (for example dislocation of the axle of angle and axis direction), as describing in more detail following.This motor reel 152 extends through the level board 124 of a rectangle and thereunder is subjected to 126 supportings of one group of gusset, and level board extends through the inside of actuator chamber 108, and these gussets are opened around the internal interval of actuator chamber 108.

As clearly illustrating among Fig. 8, blast fan 120 comprises a dish-shaped impeller backing 130, and the lower surface of this backing tightens intrinsic one group of main fan blades 132, and this lower surface supporting is around a truncated cone frame 136 of the periphery extension of all fan blade.The lower limb of frame 136 be matched with a cone body 138 a rounded upper edge around, this bullet 138 is anchored on base plate 102 and extends upward from base plate 102.Blast fan 120 is a mixed flow blast fan, sells with trade mark MODEL QEI and is waiting to examine described in the U.S. Patent application 10/297,450 (to be incorporated into this to do with reference to) such as Greenheck FanCorporation.When blast fan 120 rotation, upwards extracted out and radially outward and upwards blown into annular space 110 through import cone 138 formed air intlets from the waste gas of forced air-ventilating system 44, shown in arrow 140 (Fig. 9).

If necessary, impeller backing 130 also can comprise one group of auxiliary blower blade 134 of the upper surface that is anchored on the impeller backing, and these auxiliary blower blades 134 generate a radially outside air stream.Because axle 114 and lower bearing 118 should be provided with one of base plate 116 good sealing, therefore should there be free source of the gas and this air-flow not to form well.Yet, if leak, can form air stream flow pattern (air flow pattern), wherein air is drawn out of and upper limb by being formed on blast fan 130 and the gap between the base plate 116 are radially outward derived from actuator chamber 108.As a result, even taking place to leak, waste gas can not escape into actuator chamber 108 yet.

As clearly illustrating in Fig. 5 and 6, can enter actuator chamber 108 from the outside of combination of fans part 46 by two passages that are formed on the relative both sides.Each passage is formed by all elongated hole of the aligning that passes outer wall 100 and inwall 106, and these elongated hole are connected by a conduit wall 144.This conduit wall 144 is around passage and itself and this annular space that wall extended through 110 is isolated.As being clearly shown that among Figure 11, people can understand thoroughly any one passage and see fan drive motor 150 and all assemblies, fan shaft 114 and the hookup 122 of connection.Like this, the attendant can arrive these elements easily to check and to repair.

Referring now to Fig. 5,7 and 9,, fan drive motor 150 is in actuator chamber 108 and be installed on one extend, be substantially the horizontal supporting plate 124 of rectangle between inwall 106.Specifically, motor 150 is attached to the upper surface of a mounting bracket 154, and this mounting bracket is anchored on the upper surface of plate 124 by the securing member of all bolts 156 and so on, thereby the globality of structure is provided in the course of the work.That mounting bracket 154 comprises is one smooth, horizontally extending rectangular slab 160 and the upwardly extending a pair of reinforcing flange 168 from the relative outer end of this plate.Flange 168 extends along the direction that is arranged essentially parallel to vertically extending axis between passage.

Referring to Figure 10 and 11, motor reel 152 extends through mounting bracket 154 downwards again, and is connected in fan shaft 114 by elastic coupling 122, and this makes motor can rotate drives fan wheel 120 in the course of the work.Hookup 122 can be for by TB Woods, the single elastic coupling of Sure-Flex-AR series 4 bolts of Inc. supply, and the said firm is positioned at Pennsylvanian Chambersburg, and this hookup advantageously can radially be obedient to angle, as describing now.

Hookup 122 comprises an epimere 174 that is anchored on motor reel 152 and a hypomere 176 that is anchored on fan shaft 114.Each section all comprises around a joint 178 of the terminal of corresponding axle.Each joint 178 is included in a radial flange 180 of its axial outer end and a sleeve pipe 182 that axially extends internally from this flange 180.Each sleeve pipe 182 all has: a cylinder shape inner wall, this inwall are admitted corresponding axle; And an outer wall, this outer wall is along radially sloping inwardly from flange 180 axial inside directions.Each sleeve pipe 182 all fits in the corresponding axle bush 184, and this axle bush 184 has an inner cylindrical wall that tilts and be complementary with the inclination outer wall with sleeve pipe 182.Three bolts 186 (demonstrating two) are apart from one another by opening 120 ° and extend through flange 180 and enter axle bush 184.When bolt is screwed, the tilt internal wall biased sleeve 182 of axle bush 184 makes it like this,

axle

152 and 114 to be locked in the hookup 122 against corresponding axle.

Will be appreciated that mechanism's (for example one group of bolt) that the many hookups that can buy can provide other but that be fit to, axle is anchored on hookup.These all alternate design all fall into scope of the present invention.

One horizontally extending elasticity cylindricality plate 188 is between all axle bushes 184, and this cylindricality plate can be made by stainless steel or any material that other is fit to.Last axle bush 184 is connected in plate 188 by a pair of vertical bolt 190, and axle bush 184 is connected in plate 188 by a pair of bolt of putting upside down 192 down.Radially at interval 180 ° and adjacent with each put upside down 90 ° at interval on bolt 192 (for for simplicity, Figure 11 and 12 shows mutually radially 180 ° a vertical bolt 190 and a bolt of putting upside down 192 at interval mutually on each vertical bolt 190.Should be appreciated that: vertical and bolt that put upside down is in fact apart from one another by 90 °).

Each vertical bolt 190 extends through upper and lower axle bush 184 downwards, and fastening by a nut 194 of using always.One packing ring 196 is placed between plate 188 and the following axle bush 184.One sleeve pipe 198 that does not have a screw thread around the axle of bolt 190, and applies effect against the upper surface of plate 188 near bolt head.Therefore, sleeve pipe 198 and nut 194 are anchored on down axle bush 184 with plate 188.Sleeve pipe 198 extends through the hole 1 that is formed in the axle bush 184, the diameter in this hole is greater than the diameter of sleeve pipe 198 and bolt head, thus provide can make sleeve pipe 198 in hole 200 angular displacement and make bolt head and sleeve pipe 198 can be in hole 200 the axial gap of displacement.The bolt of putting upside down 192 similarly extends upward by axle bush 184 and last axle bush 184 are anchored on plate 188 will go up axle bush 184 down.

Referring to Figure 12, hookup 122 is obedient to along angle.Specifically, when

axle

114 and 152 when angle misplaces, all bolt heads are also angle dislocation in corresponding hole 200, and plate 188 is just crooked to adapt to this angle dislocation.Gap between all holes 200 of all sleeve pipes 198 and correspondence extends through axle bush 184, combines with elastic plate 188, thereby even hookup 122 also can be worked when axle 112 and the dislocation of 152 angles.According to one embodiment of present invention, hookup 122 can adapt between the

axle

112 and 152 1 ° angle dislocation, yet conception of the present invention is really not so narrow.

Hookup 122 also is obedient to vertically.Specifically, if for example in the course of the work with

axle

114 and 152 each other when the other side pushes away,

sleeve pipe

182 and 198 can compress vertically.On the other hand, if along mutually away from

direction push shaft

114 and 152, then upper and lower axle bush 184 separately, the bolt head with

bolt

190 and 192 is compressed in the corresponding hole 200 thus.In the case, plate 188 is also crooked to adapt to two axial separation between the axle bush 184.

In the time will carrying out maintenance work, can arrive bolt 186 by passage and the inspection socket between rectangular slab 124 and cylindrical inner wall 106 through annular space 110 to the relevant assembly of the motor in the actuator chamber 108 150 or its.In case unclamp all bolts 186, axle 152 can be pulled down from sleeve pipe 182.Advantageously, hookup 122 is arranged in actuator chamber 108, therefore when with axle 152 during from hookup 122 disengagements the user can not be exposed to the pollutant of building waste gas.In addition, owing to have only single bearing 118 rotatably mounted fan shafts 114, need just reduce maintenance workload the legacy system of at least two bearings with respect to fan/motor reel.In addition, bearing 118 absorbs the thrust loading that blast fan 120 applies, and has therefore protected the bearing in the motor 150.

Advantageously, an edge of mounting bracket 154 is connected in level board 124 by a hinge 158, and this makes that in a single day securing member 156 being pulled down mounting bracket 154 just can pivot with respect to plate 124.Preferably, hinge 158 towards perpendicular to the axis that between passage, vertically extends through.Like this, hinge extends perpendicular to flange 168.Hinge 158 can pivot mounting bracket 154 and motor 150 in the direction of arrow A from a primary importance towards a second place to one of passage.Wherein, can engage and securing member 156 can be connected in support 154 plate 124 by hookup 122 at primary importance place

axle

152 and 114; Can carry out examination and maintenance at second place place.All wedge-riser flanges 168 provide additional structure support near hinge 158, because produce the power that increases in this place's motor meeting of pivot.

Can manually can arrive the required passage of chamber 108 all intrawares around hinge 158 pivot motor 150 to provide, rotational angle is an angle (with respect to support 154 and plate 124) arbitrarily between 0 ° and 180 °.In one aspect of the invention, motor 150 pivots about 90 °, thereby flange 168 and hinge 158 adjacent vertical surface stop the pivot of motor 150 to exceed 90 °.Perhaps, the extra space that provides with respect to plate 124 can be provided vertical flange surface, motor can be pivoted exceed 90 °.In this case, a form is that the retaining head of flange 145 can extend (Fig. 7) and stretch out a required distance from wall 144, thereby in case motor 150 can be engaged in the upper surface of support when being pivoted to required angle.In case after pivoting, the part of motor 150 is extensible by one of all passages, simultaneously also can be by all assemblies in other passage arrival actuator chamber 108.

Should be appreciated that: the method that can use always is pulled down hinge 158 (for example by pulling down joint pin), thereby is convenient to motor 150 is pulled down from sub-assembly 42.

Perhaps, referring to Figure 13, motor 150 can directly be anchored on plate 124 by all bolts 156.In this embodiment.Motor reel 152 can be thrown off from hookup 122 by said method, and bolt 156 can be pulled down from the bottom of motor 150, thereby motor 150 is unclamped so that it is pulled down from actuator chamber 108.

Referring to Fig. 5-7 and 9, waste gas moves upward and leaves by annular space 110 and by the nozzle ring 162 that is formed on

wall

100 and 106 upper ends, shown in arrow 164 again.Expand by upper end 166 and to form nozzle 162, thereby the cross-sectional area of nozzle 162 is significantly smaller than the cross-sectional area of annular space 110 inwall 106.As a result, its speed significantly increases when waste gas leaves by nozzle 162.As clearly illustrating in Figure 11 and 13, all blades 170 are installed in the annular space 110 around its periphery, thereby make the path of waste gas become straight when waste gas leaves fan and upwards advances.The effect of also finding blade 170 can increase the surrounding air that is delivered in the waste gas, as will be described further below.

Specifically be installed in the top of combination of fans part 46 and center on nozzle 162 referring to Fig. 6 and 9, one wind cover 52.One pack support 54 connects around the periphery of outer wall 100.These supports 54 from the top of outer wall 100 upwards and extend radially outwardly and be anchored on wind cover 52.Wind cover 52 is truncated cone basically.Its bigger rounded bottom opening is aimed at nozzle ring 162 around central axis 56 coaxial line ground.The bottom of wind cover 52 is expanded by inlet bell 58, and the root edge of inlet bell 58 is aimed to the isoplanar basically with the edge of nozzle 162.The top of wind cover 52 ends at column annulus part 60, and this part forms the outlet of exhaust assembly 42.

Specifically referring to Fig. 9, the size of wind cover 52 and position are set so that the surrounding air of maximum is brought in the waste gas that leaves nozzle 162 with respect to nozzle 162.Surrounding air is by being formed on the annular gap between nozzle 162 and the inlet bell 58, and is as shown in arrow 62.Surrounding air mixes with the waste gas of the eddy current that leaves by nozzle 162, high speed, and this mixture is joined discharge by the waste gas outlet at the top of wind cover 52.

Many features of this system are to be used to the performance strengthening the ability of entrained ambient air and improve fan.Find: being positioned at the inlet bell that expands 58 that wind overlaps 52 bottoms can improve several percentage points with the ability of entrained ambient air.This raising of the ability of entrained ambient air is relative with the size of inlet bell 58 insensitive for open angle.This also is the same for the loop section 60 that wind overlaps 52 tops.Except the axial height by increasing wind cover 52 can for loop section 60 provide improve arbitrarily, also find and the ability of entrained ambient air can be improved 5% to 8%.Test shows that the minor variations of its length can obviously not change the reinforcement of this performance.

Also find: the I of the overlapping degree between the edge by making nozzle 162 and the root edge of wind cover 52 maximizes the ability of entrained ambient air.In a preferred embodiment, ground, basic isoplanar, these edges is aimed at, thereby does not have overlapping between them.

Another feature that the service behaviour of fan is significantly improved is the shape of nozzle 162.In the art, thus with its shape of nozzle be configured to make waste gas by radially inwardly guiding along central axis 56 " focusing ".By outer wall radially being tapered inwardly or by making inner and outer wall all radially inwardly tapered so that waste gas guiding centre axis 56 can be arrived this effect.A discovery of the present invention is by the shape of nozzle 162 being arranged to make waste gas radially outward guided but not towards radially inwardly guiding of central axis 56, can increases the ability of entrained ambient air and reduce the pressure loss.In a preferred embodiment, expand by the top 166 that makes inwall 106 and can arrive this effect.This structure can make the ability of entrapped air improve several percentage points, and makes the pressure loss reduce more than 30%.This raising of believing the ability of entrapped air is owing to because of not making causing than the giant girth that outer wall 100 radially inwardly causes.The minimizing of believing the pressure loss is because most of waste gas stream that makes progress by annular space 110 near outer wall 100, and by making outer wall 100 keep straight, does not almost have waste gas to turn to because of nozzle 162 or changes direction.

Specifically, also mix by passage, shown in arrow 170 with the surrounding air suction and with waste gas referring to Fig. 5.This surrounding air flows out the open top of open inwall 106 and mixes with the waste gas that exhales from nozzle 162 on every side.Thus, surrounding air mixes from the inboard of waste gas.

Shown in Fig. 5,6,9 and 14, separate with other element in order to protect the fans drive element in the actuator chamber 108, above the top of fan shaft 114, be formed with an inclined roof panels 172.From the sealing of the open top end of inwall 106, and this top board tilts this top board 172 with actuator chamber 108, thereby can be with the rainwater passing away.The inclination of top board 172 also provides extra gap, thereby motor 150 can be pivoted in the clear.In another aspect of the present invention, be convenient to more motor 150 is pulled down from sub-assembly 42 thereby can cancel top board 172, by upwards being mentioned by wind cover 52, motor 150 can arrive this purpose easily.

Except the reinforcement to performance discussed above, the structure of exhaust assembly makes and can customize to satisfy user's concrete needs it.Such customer requirements comprises amount, plume height, the amount of dilution of surrounding air and the sub-assembly height more than roof top of waste gas.User's target comprises that cost changes little most.Size or horsepower by selecting fan motor and change four systems parameter shown in Figure 17 and can finish such customization.

Exit area of nozzle:

Increasing this parameter can reduce required motor house power, reduce the surrounding air of carrying secretly, the rise height that lowers the column of smoke.Reducing this parameter can increase required motor house power, increase the surrounding air of carrying secretly, the rise height that increases the column of smoke.

Wind cover discharge area:

Increase this parameter and can increase the surrounding air of carrying secretly, but rise that can appreciable impact column of smoke height or fan flow.Reduce this parameter and can reduce the surrounding air of carrying secretly, but rise that can appreciable impact column of smoke height or fan flow.

Wind cover length:

Increase this parameter and can increase the surrounding air of carrying secretly, the rise height that increases the column of smoke, but can the appreciable impact fan flow.Reduce this parameter and can reduce surrounding air, the minimizing column of smoke rise height of carrying secretly, but can the appreciable impact fan flow.

Wind cover inlet-duct area (minor effect):

Increase this parameter and can increase surrounding air, the increase column of smoke rise height of carrying secretly, but can the appreciable impact fan flow.Reduce this parameter and can reduce surrounding air, the minimizing column of smoke rise height of carrying secretly, but can the appreciable impact fan flow.

For example, for a specific system, the length that table 1 shows wind cover is the surrounding air amount that how to change in waste gas to be carried secretly, and table 2 to show wind cover outlet diameter be how to change the surrounding air amount of being carried secretly.

Table 1

Wind cover length dilution

39 inch 176%

49 inch 184%

59 inch 190%

Table 2

Wind cover outlet diameter dilution

17 inch 165%

21 in2s 20%

25 in2s 75%

How table 3 shows the surrounding air amount of being carried secretly changes as the function of nozzle area, and Fig. 4 shows the surrounding air amount of being carried secretly and the relation between the wind cover inlet-duct area.

Table 3

Nozzle inlet area dilution factor

0.79 square feet 120%

0.52 square feet 140%

0.43 square feet 165%

Table 4

Wind cover inlet-duct area dilution factor

10.3 square feet 176%

12.9 square feet 178%

Table 1 to 4 in, amount of dilution is by using the flow by the combination of fans part to calculate divided by wind cover outlet flow.

Specifically referring to Figure 18 and 19, except the nozzle end of combination of fans part 46 being made amendment to add the second additional nozzle assembly for fluid 50, an alternative embodiment of the invention and above-described preferred embodiment are basic identical.In this second embodiment, the outer wall 100 of combination of fans part is radially inwardly tapered in the top forming one first nozzle 53, and straight upwardly extending inwall 106 has exceeded nozzle 53.Second nozzle assembly for fluid 50 is a truncated cone element, and this element is anchored on the extension of inwall 106 by all carriages 55.This second nozzle assembly for fluid 50 expands around its bottom with the similar inlet bell 57 on formation and the wind cover 52.Second nozzle assembly for fluid 50 is concentricity around inwall 106 and the isoplanar, top of its top and inwall 106, thereby forms annular second nozzle 59 between them.All carriages 61 around the peripheral fastening of second nozzle assembly for fluid 50 and upwards and extend radially outwardly with supporting wind cover 52.Wind cover 52 is gone back coaxial line ground and is aimed at the inwall 106 and second nozzle assembly for fluid 50, and the basic isoplanar, top of its lower end and second nozzle 59.In this another embodiment, can also be by inwall 106 is expanded outwardly out but not make outer wall 100 tapered to form first nozzle 53.

Specifically referring to Figure 19, the annular space between the lower end of second nozzle assembly for fluid 50 and the outer wall 100 forms one first gap, and surrounding air enters by this gap, and is as shown in arrow 63.This air is carried secretly with its dilution by the whirlpool shape waste gas that leaves first nozzle 53.Similarly, the lower end of wind cover 52 and the annular space between second nozzle assembly for fluid 50 form one second gap, and surrounding air enters by this gap, and is as shown in arrow 65.This air is carried secretly by diluted waste gas once, that leave second nozzle 59, thereby makes waste gas further obtain dilution.As to first embodiment, shown in arrow among Figure 18 67 pass through passage enter and flow out inwall 106 the top other surrounding air discharged at a high speed wind overlap the waste gas outlet at 52 tops before also with exhaust gas dilution.

Above explanation is the preferred embodiments of the present invention, and those persons skilled in the art can carry out many modifications and can not deviate from spiritual essence of the present invention and scope it.In order to inform that the public may fall into the various embodiments of the scope of the invention, the spy makes appended claim.

Claims

1. one kind is configured to combination of fans part that contaminated air is discharged from a building, and this combination of fans part comprises:

One outer wall forms a chamber and forms an air intlet in the bottom of this outer wall in this outer wall, this air intlet receives contaminated air;

One inwall, this inwall be anchored on outer wall and be arranged in chamber with it is divided into the isolated center cavity of contaminated air and receive contaminated air one around annular space;

One fan, this fan are arranged in chamber and link to each other with a fan shaft, thereby upwards blow out through annular space through air intlet suction waste gas and with it;

One motor, this motor mounting are in center cavity and have a motor reel of drive fan axle; And

One hookup, this hookup are arranged in center cavity and fan shaft are linked to each other with motor reel.

2. combination of fans part as claimed in claim 1 is characterized in that, hookup is with respect to being obedient to along the dislocation of a direction at least between motor reel and the fan shaft.

3. combination of fans part as claimed in claim 2 is characterized in that, hookup is obedient to respect to the axial dislocation between motor reel and the fan shaft.

4. combination of fans part as claimed in claim 2 is characterized in that, hookup is obedient to respect to the dislocation of the angle between motor reel and the fan shaft.

5. combination of fans part as claimed in claim 1 is characterized in that, this combination of fans part also comprises a plate, and this plate extends through center cavity to be separated with the fan chamber that will hold fan and an actuator chamber that holds motor.

6. combination of fans part as claimed in claim 5 is characterized in that, the combination between fan shaft and the motor reel is that a single bearing that is supported by plate is supported.

7. combination of fans part as claimed in claim 1 is characterized in that, motor mounting is on a plate, and an inspection socket is positioned between described plate (124) and the inwall (106), and this inspection socket makes the people can arrive hookup.

8. combination of fans part as claimed in claim 7 is characterized in that, motor is anchored on the plate by at least one dismountable securing member.

9. combination of fans part as claimed in claim 1, it is characterized in that, motor is a pivotal mounting, this motor can pivot between one first bonding station and one second pivot disengaged position, be linked in fan shaft with drive fan at first bonding station, one motor reel, and throw off at the second pivot disengaged position motor reel and fan shaft.

10. on the roof that a kind is installed in a building, be used for the exhaust assembly removed from the contaminated air of one or more constructure ventilation mouths, this exhaust assembly comprises:

One air intlet, this air intlet receives contaminated air; At least one surrounding air entrainment zone, it mixes surrounding air and contaminated air mutually to generate diluted air; And an air outlet slit, this air outlet slit is discharged diluted air;

One fan chamber, this fan chamber accommodates a fan, and this fan is linked in a fan shaft to blow towards the direction of air outlet slit through air intlet suction waste gas and with its edge; And

One actuator chamber, this actuator chamber and waste gas are isolated and accommodate a motor, and this motor has to operate and is used for a motor reel of drive fan axle and the hookup that fan shaft is linked to each other with motor reel.

11. exhaust assembly as claimed in claim 10 is characterized in that, hookup with respect between motor reel and the fan shaft, be obedient to along the dislocation of a direction at least.

12. exhaust assembly as claimed in claim 11 is characterized in that, hookup is obedient to respect to the axial dislocation between motor reel and the fan shaft.

13. exhaust assembly as claimed in claim 11 is characterized in that, hookup is obedient to respect to the dislocation of the angle between motor reel and the fan shaft.

14. exhaust assembly as claimed in claim 10 is characterized in that, this exhaust assembly also comprises a plate, and this plate separates fan chamber from actuator chamber.

15. exhaust assembly as claimed in claim 14 is characterized in that, the combination between fan shaft and the motor reel is that a single bearing that is supported by plate supports.

16. exhaust assembly as claimed in claim 10 is characterized in that, motor mounting is on a plate, and this plate is supported in the actuator chamber, and an inspection socket is positioned between described plate (124) and the inwall (106), and this inspection socket makes the people can arrive hookup.

17. exhaust assembly as claimed in claim 10, it is characterized in that, motor shaft is installed in the actuator chamber, this motor can pivot between one first bonding station and one second pivot disengaged position, be linked in fan shaft with drive fan at first bonding station, one motor reel, and throw off at the second pivot disengaged position motor reel and fan shaft.

18. the exhaust assembly that waste gas is discharged from a building, this exhaust assembly comprises:

One housing, this housing are formed with an entrance point that receives waste gas and the port of export that waste gas is discharged, and this housing forms an actuator chamber that completely cuts off with waste gas and is exposed to a fan chamber of waste gas;

One fan, this fan are arranged in fan chamber and are connected in a fan shaft being rotated, thereby through inlet suction waste gas and along the direction direct exhaust towards outlet;

One motor, this motor mounting are in actuator chamber and comprise a motor reel that is linked in fan shaft by a hookup that is arranged in actuator chamber; And

At least one passage, this passage extends through housing, makes the people can arrive motor and hookup.

19. exhaust assembly as claimed in claim 18 is characterized in that, hookup with respect between motor reel and the fan shaft, be obedient to along the dislocation of a direction at least.

20. exhaust assembly as claimed in claim 19 is characterized in that, hookup is obedient to respect to the axial dislocation between motor reel and the fan shaft.

21. exhaust assembly as claimed in claim 19 is characterized in that, hookup is obedient to respect to the dislocation of the angle between motor reel and the fan shaft.

22. exhaust assembly as claimed in claim 18 is characterized in that, this exhaust assembly also comprises a separator, and this separator separates fan chamber and actuator chamber.

23. exhaust assembly as claimed in claim 18 is characterized in that, the combination between fan shaft and the motor reel is that a single bearing that is supported by plate supports.

24. exhaust assembly as claimed in claim 18 is characterized in that, motor mounting is on a plate, and this plate is supported in the actuator chamber, and an inspection socket is positioned between plate (124) and the inwall (106).

25. exhaust assembly as claimed in claim 24 is characterized in that, can arrive hookup by passage and inspection socket.

26. exhaust assembly as claimed in claim 25 is characterized in that, motor is anchored on the plate by at least one dismountable securing member.

27. exhaust assembly as claimed in claim 18, it is characterized in that, motor shaft is installed in the actuator chamber, this motor can pivot between one first bonding station and one second pivot disengaged position, be linked in fan shaft with drive fan at first bonding station, one motor reel, and throw off at the second pivot disengaged position motor reel and fan shaft.