CN101018947B - Exhaust fan assembly, installation method and plenum system used for it - Google Patents
Exhaust fan assembly, installation method and plenum system used for it Download PDFInfo
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- CN101018947B CN101018947B CN200580006162.5A CN200580006162A CN101018947B CN 101018947 B CN101018947 B CN 101018947B CN 200580006162 A CN200580006162 A CN 200580006162A CN 101018947 B CN101018947 B CN 101018947B
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- wall
- plenum system
- inwall
- exhaust fan
- fan assembly
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The present invention discloses an exhaust fan assembly, assembly method thereof and plenum system thereof. The exhaust fan assembly is used for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a wind band mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a bearing chamber and surrounding annular space. A fan driven by a shaft extending downward from the bearing 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.
Description
The cross reference of related application
The application is based on and submitted on July 15th, 2004, name is called the U.S. Provisional Application 60/588 of " exhaust fan assembly ", 074, this provisional application is based on and submitted on January 20th, 2004, name is called the U.S. Provisional Application 60/537,609 of " exhaust fan assembly ".
Technical field
The present invention relates generally to venter, relate in particular to such venter: this venter 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 ambient air with the dilution pollutant, then the air after diluted is discharged in the external environment from building.
Background technique
Many dissimilar vent systems 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 is that they are discharged by a higher exhaust chimney with these smog scheme of disposing from building, 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 U. S. Patent 4,806, discloses to some extent in 076,5,439,349 and 6,112,850.Existing systematic comparison costliness, be difficult to safeguard safely and be not easy to adapt to the specification of relative broad range.
Summary of the invention
The present invention is a kind of exhaust fan assembly, and this assembly parts is admitted at an air intlet place to mix with ambient air from the waste gas of a building, with waste gas and mixed air upwards blown to and one be the height of the column of smoke substantially on an air outlet slit.This exhaust fan assembly comprises: the outer wall of a closure, and forming one in this outer wall is columniform chamber substantially; One air intlet, this air intlet is formed on the bottom of cylindrical chamber; The inwall of one closure, this inwall is anchored on closed outer wall and is positioned at the cylindrical cavity chamber interior this chamber is divided into the supporting cavity of a centralized positioning and the annular space of a periphery, and closed inwall upwards forms a fan chamber with air intlet is spaced apart with the bottom in cylindrical chamber; One, this is rotatably mounted in closed inwall and puts in fan chamber downwards; One blast fan, this blast fan are connected in axle and are arranged in fan chamber by air intlet waste gas is drawn into and this waste gas is upwards blown out by annular space; And a motor, this motor is linked in axle in the supporting cavity with the rotary fan impeller.
Inside and outside wall is located to be shaped as the area that makes annular space in the top and is dwindled greatly to form a nozzle, and this nozzle can increase the flow velocity through its waste gas that blows out.In first preferred embodiment, inwall radially outwards opens in the top with the formation nozzle, and in second embodiment, the upper end of outer wall is inwardly tapered to form nozzle.
Supporting cavity and exhaust flow are isolated fully, protect fan drive not to be subjected to the influence of corrosive gas thus.Provide the passage that enters supporting cavity from the outside of combination of fans part by the formed gateway of the conduit wall of bridge joint between inside and outside wall, thereby even when fan work, also can carry out safety inspection and maintenance all driven units of fan.In one embodiment, motor mounting is in supporting cavity inside and be directly connected in fan shaft, and in second embodiment, motor mounting is linked in fan shaft in the outside of combination of fans part and by a belt drive that extends through inspection socket.
In order to ensure there not being exhaust gas leakage to advance in the supporting cavity, blast fan comprises all auxiliary blades, and these blades are with respect to the inner generation of supporting cavity one negative pressure.Like this, leak if exist around for example fan shaft or its supporting supporting, waste gas also can't flow in the supporting cavity.
Another aspect of the present invention is that ambient air is mixed mutually with waste gas, thereby waste gas can be diluted in the column of smoke greatly.Can reach this purpose by many methods.At first, the combination of fans part is installed in the plenum system, and this system admits waste gas from building, waste gas is mixed with ambient air by a controlled windscreen feed pressure ventilation system and mixing air is transferred to the air intlet on the bottom of this combination of fans part.Windscreen is controlled the variation that to consider the air quantity of from building, discharging to keep the constant relatively air stream that passes through the combination of fans part.Like this, can keep the height of the column of smoke and the minimizing of the exhausted air quantity that needn't consider to discharge from building, otherwise this minimizing can need to change the rotating speed of fan.
In order further to use diluted with ambient air waste gas, a wind cover (windband) is installed in the top of combination of fans part and centers on nozzle.This wind cover is truncated cone, and this truncated cone has a circular open and forms the air intlet of an annular between two at it in its bottom around nozzle.By this import suction ambient air, thereby air before being discharged from, is mixed with the waste gas that leaves nozzle at a high speed the less circular exhaust port by wind cover top.In order to improve the validity of this mixed process, the feather edge of wind cover expands outwardly out, and its top edge forms a cylinder ring.
In order further to dilute waste gas with ambient air, open at the top of inwall, and ambient air is drawn into by inspection socket and upwards by these openings with the air mixing of discharging from nozzle.In a preferred embodiment, in two gateways of two opposite sides formation of combination of fans part, thereby can enter supporting cavity better and can increase ambient air.
In addition, the invention still further relates to above-mentioned exhaust fan assembly be installed in one the building the roof on method, this method may further comprise the steps: a) plenum system is installed on the roof, air intlet on one bottom of this plenum system is aimed at extending through an exhaust asending pipe, and this plenum system has four walls that have detachable panel; B) panel is optionally pulled down to form a bypass air intlet therein from a wall of plenum system; C) fan housing is installed on plenum system, this fan housing covers bypass air inlet; And d) described combination of fans part is installed in plenum system the top one the outlet the top; Wherein, the physical planning that each installation is required is depended in the selection of the panel that pull down.
Preferably, said method also comprises: e) optionally one second panel is pulled down from another wall of plenum system; And f) to adjoining one second plenum system repeating step that first plenum system installs a) to e), the wall that these two quilts remove second panel is adjacent to each other.
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
Referring now to following accompanying drawing, the corresponding components identical of identical label in these accompanying drawings, these accompanying drawings are:
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 fan assembly of preferred embodiment;
Fig. 3 is the side cross-sectional view of exhaust fan assembly shown in Figure 2;
Fig. 4 is the three-dimensional exploded view of combination of fans part shown in Figure 3;
Fig. 5 is the partial view of biopsy cavity marker devices, combination of fans part shown in Figure 3;
Fig. 6 is the cross-sectional view that obtains along the plane 6-6 among Fig. 3;
Fig. 7 is the cross-sectional view that obtains along the plane 7-7 among Fig. 3;
Fig. 8 is the cross-sectional view that obtains along the plane 8-8 among Fig. 3;
Fig. 9 is the cross-sectional view that obtains along the plane 9-9 among Fig. 3;
Figure 10 A is the stereogram of plenum system that forms the part of exhaust fan assembly shown in Figure 2, wherein some part split except;
Figure 10 B is the three-dimensional exploded view of plenum system shown in Figure 10 A;
Figure 10 C is the side-looking exploded view of plenum system shown in Figure 10 A, wherein some part split except;
Figure 11 is the stereogram of two plenum systems of installing side by side;
Figure 12 is second embodiment's of venter of the present invention system a schematic representation, wherein some part split except;
Figure 13 is the front view of venter shown in Figure 12 system; And
Figure 14 shows the schematic representation of the combination of fans part of the parameter that determines desirable performance.
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 an asending pipe 38 of other upper surface that extends up to roof 40 or building.The upper end of this asending pipe 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.
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 exhaust flow of chamber 28.Like this, the air quantity of discharging by each fume hood 22 with regard to may command.
Building can be equipped with more than one exhaust fan assembly 42, and each such assembly parts 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 location of harmful gas from building 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.Can use an electronic control system (not shown) to come the work of control system.
As being clearly shown that among Figure 10 A, B and the C, plenum system 44 comprises a rectangular case that is formed by four vertical walls 58 and roof 60.One rectangle support 59 is fastened on the roof 60 and the removably fastening combination of fans part 46 thereon of supporting.All four walls 58 all are configured with identical panel 61, can optionally remove these panels so that plenum system 44 towards any required direction.When a panel 61 is removed, on the wall 58 of plenum system, just form a bigger opening.On a sidewall 58, pull down panel 61 and be connected with the front portion of fan housing 62 with formation.
One windscreen 70 is installed under the fan housing 62 amount of ambient air that enters the housing of plenum system with control through bypass air inlet 63.It comprises all windscreen blades, these windscreen blades are subjected to electronics or pneumatic control so that one bypass air enters plenum system 44, and how air quantity that discharge from building changes no matter this can make the air stream total amount that flows into combination of fans part 46 keep constant.Enter plenum system 44 through the exhaust gas inlet 71 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 assembly parts 46 by the waste gas outlet in the top of support 59 72 by extraction upwards.
As clearly illustrating among Figure 10 B and the 10C, an isolated windscreen 74 is slidably mounted in the support 59 and also just is positioned under the waste gas outlet 72.Should support by the flange 76 that the inside around support 59 forms by isolated windscreen 74, and put in place by the antetheca slip of support.Isolated windscreen 74 is the outdoor ambient airs that are used for when fan is not the worked isolated combination of fans part 46 of flowing through downwards.Isolated windscreen 74 has all blades, and these blades are closed will completely cut off windscreen when fan is not worked by gravity, revolution or running shaft rotation.By making fan housing 62 throw off and make isolated windscreen 74 skid off support 59, can pull down to check or to repair completely cutting off windscreen 74 easily from plenum system 44.
As clearly illustrating among Figure 11, the dismountable panel 61 on plenum system 44 sidepieces also makes a plurality of plenum systems 44 combine with a single asending pipe 38.In this structure, all plenum systems 44 are installed adjacent to each other, and the panel 61 in the wall 58 of adjacency is removed chamber 80 with single, the amplification that forms that the housing combined by them forms between them.The plenum 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 62 is provided by identical detachable panel 61 and the mounting hole on all four walls 58 of plenum system 44.
Specifically referring to Fig. 2, combination of fans part 46 is removably mounted on the top of plenum system 44.Combination of fans part 46 has a rectangular susceptor plate 102, and this base plate has the limit skirt that extends along the top snug fit of rectangle support 59 downwards.All fastening pieces are connected in the top of support 59 with this limit skirt, by these fastening pieces are pulled down, whole fan assembly parts 46 can be pulled down being used for and repair or check.
Specifically referring to Fig. 3,4 and 6, combination of fans part 46 is seated in the top of plenum system 44 and comprises a cylindrical outer wall 100 that is welded in rectangular susceptor plate 102.Helping that it is bearing in vertical position, and the quantity of gusset 104 can be according to the size of fan and difference around the welding of the lower end of outer wall 100 for one group of eight gusset 104.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 bearing chamber 108, is in the circumferential annular space 110 between inside and outside wall 106 and 100 and be positioned at fan chamber 112 below the inwall 106.
One fan shaft 114 is arranged in supporting cavity 108 and rotatably is anchored on a base plate 116 of the bottom that is welded on inwall 106 by a supporting 118.Fan shaft 114 extends into fan chamber 112 downwards with end bearing one blast fan 120 under it, and it also extends upward into supporting cavity 108, and it is rotatably mounted by a upper support 122 in supporting cavity 108.This upper support 122 is anchored on a level board 124, and this level board extends through the inside of supporting cavity 108 and thereunder is subjected to 126 supportings of one group of gusset, and these gussets are opened along the internal layout of supporting cavity 108.
Specifically referring to Figure 4 and 5, 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 its upper surface tightens intrinsic one group of auxiliary blower blade 134.Main fan blades 132 supportings are along a truncated cone frame 136 of the girth extension of fan blade.The lower limb of this frame 136 cooperates around a rounded upper edge of a cone body 138, and this taper 138 is anchored on base plate 102 and extends upward from base plate 102.Blast fan 120 is a mixed flow blast fan, sell with trade mark MODEL QEI and waiting to examine described in the U.S. Patent application 10/297,450 (corresponding PCT application publication number is WO01/96745) (to be incorporated into this to do with reference to) such as Greenheck Fan Corporation.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 plenum system 44, shown in arrow 140.
Specifically referring to Fig. 5, it is radially outer air stream that all auxiliary blower blades 134 on the top surface of blast fan 130 generate direction.Because axle 114 and lower support 118 should be provided with the better seal to base plate 116, therefore should there be air source and this air-flow not to form well.Yet, if leak, can form an 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 radially outward between the base plate 116 are derived from supporting cavity 108.As a result, even taking place to leak, waste gas can not escape into supporting cavity 108 yet.
Can enter supporting cavity 108 from the outside of combination of fans part 46 by two passages that are formed on the relative both sides.As clearly illustrating among Fig. 3,4 and 6, 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 this passage and itself and this annular space that wall extended through 110 is isolated.As being clearly shown that among Fig. 6, people can understand thoroughly any one passage and see fan shaft 114 and relevant supporting 118 and 122.Like this, the attendant can touch these elements easily to check and to repair.
Specifically referring to Fig. 3, the passage that enters supporting cavity 108 also makes fan drive motor 150 can be positioned at the outside of combination of fans part 46 and is connected in fan shaft 114 by one of all passages.In a preferred embodiment, motor 150 be closed in the engine casing (Eng Cas) 152 and make its axle 154 vertically towards ground with motor mounting in outer wall 100.Motor reel 154 is connected in fan shaft 114 by the belts 156 around drive wheel on axle 154 and 114 158 and 160 extensions respectively.Motor 150 also can be arranged in supporting cavity 108, and its axle is directly connected in fan shaft.In this embodiment, these passages can allow to touch motor 150 to be used for inspection, to repair and to replace.
Specifically referring to Fig. 3,4 and 6, waste gas moves upward and leaves by annular space 110 and by a ring nozzle 162 that is formed on wall 100 and 106 upper ends, shown in arrow 164.Expand by upper end 166 and to form nozzle 162, thereby the cross-section area of nozzle 162 is significantly smaller than the cross-section 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 Fig. 6 and 8, 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 finding all blades 170 is to increase the ambient 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. 4 and 6, one wind cover 52.One group of carriage 54 connects around the periphery of outer wall 100, and these carriages from the top of outer wall upwards and extend radially outwardly and be anchored on wind cover 52.Wind cover 52 is truncated cone basically.Its bigger rounded bottom opening around central axis 56 coaxial line ground in alignment with ring nozzle 162.The bottom of wind cover 52 is expanded by an inlet bell 58, and the root edge of this inlet bell 58 is aimed to the isoplanar basically with the edge of nozzle 162.The top of wind cover 52 ends at a ring-shaped cylinder part 60, and this part forms the outlet of exhaust fan assembly 42.
Specifically referring to Fig. 6, the size of wind cover 52 and position are set so that the ambient air of maximum flow is brought in the waste gas that leaves nozzle 162 with respect to nozzle 162.Ambient air is by being formed on the annular space between nozzle 162 and the inlet bell 58, and is as shown in arrow 62.Ambient air mixes with the waste gas of the eddy current that leaves by nozzle 162, high speed, and this mixture is discharged by the waste gas outlet that wind overlaps 52 tops.
Many features of this system are to be used to the performance strengthening the ability of entrained ambient air and improve fan.Find: be positioned at the inlet bell that expands 58 that wind overlaps 52 bottoms and can make the ability of entrained ambient air increase several percentage points.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 ring-shaped cylinder part 60 that wind overlaps 52 tops.Except the axial height by increasing wind cover 52 can for ring-shaped cylinder part 60 provide improve arbitrarily, also find to make the ability of entrained ambient air to increase by 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, make do not have between them overlapping.
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 " converge " along central axis 56.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 reached this effect.A discovery of the present invention is: by the shape of nozzle 162 being arranged to make waste gas guided by radially outward rather than towards radially inwardly guiding of central axis 56, can increasing 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 reach this effect.This structure can make the ability of entrapped air increase several percent points, reaches 30% and the pressure loss is reduced.This increase 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 exhaust flow 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 ambient air suction and with waste gas referring to Fig. 3.This ambient air flows out the open top of the inwall 106 that expands and mixes with the waste gas that exhales from all nozzles 162 on every side.Thus, ambient air mixes from the inboard of waste gas.
Shown in Fig. 3,4,6 and 7,, above the top of fan shaft 114, be formed with an inclined roof panels 172 in order to protect all fans drive elements in the supporting cavity 108.From the sealing of the open top end of inwall 106, and this top board tilts this top board 172 with supporting cavity 108, thereby can be with the rainwater discharge route.Though this is not a problem when fan running, rainwater and other material will fall into the combination of fans part when the fan stall.
Except the reinforcement to performance discussed above, the structure of exhaust fan assembly makes and can customize to satisfy user's concrete needs it.Such customer requirements comprises the amount of dilution of exhausted air quantity, plume height, ambient air and the assembly parts height more than roof portion.User's target comprises that cost changes little, maximizing performance and Security maximization most.Size or horsepower by selecting fan motor and change four systems parameter shown in Figure 14 and can finish such customization.
Exit area of nozzle:
Increasing this parameter can reduce required motor house power, reduce the ambient air of carrying secretly, the rise height that lowers the column of smoke.Reducing this parameter can increase required motor house power, increase the ambient air of carrying secretly, the rise height that increases the column of smoke.
Wind cover discharge area:
Increase this parameter and can increase the ambient air of carrying secretly, but rise that can appreciable impact column of smoke height or fan flow.Reduce this parameter and can reduce the ambient 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 ambient 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 ambient 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 ambient air, the increase column of smoke rise height of carrying secretly, but can the appreciable impact fan flow.Reduce this parameter and can reduce ambient 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 ambient 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 ambient 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 ambient air amount of being carried secretly changes as the function of nozzle area, and Fig. 4 shows the ambient air amount of being carried secretly and the relation between the wind cover inlet-duct area.
Table 3
Nozzle inlet area dilution
0.79 square feet 120%
0.52 square feet 140%
0.43 square feet 165%
Table 4
Wind cover inlet-duct area dilution
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 12 and 13, 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 13, the annular space between the lower end of second nozzle assembly for fluid 50 and the outer wall 100 forms one first gap, and ambient air enters by this gap, and is as shown in arrow 63.This air is carried secretly with its dilution by the 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 ambient 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 12 67 pass through passage 144 enter and flow out inwall 106 the top other ambient air discharged at a high speed wind overlap the waste gas outlet at 52 tops before also with exhaust gas dilution.
Claims (23)
1. exhaust fan assembly comprises:
The outer wall of one closure, this outer wall form a columniform chamber therein, and an air intlet is formed on the bottom of this cylindrical chamber;
The inwall of one closure, this inwall is anchored on closed outer wall and is arranged in cylindrical chamber with the annular space around the supporting cavity and that is divided into a centralized positioning, and closed inwall upwards forms a fan chamber with air intlet is spaced apart with the bottom in cylindrical chamber;
One base plate, this base plate are anchored on the bottom of closed inwall;
One axle of rotatably installing, this axle is arranged in supporting cavity and puts in fan chamber downwards by base plate;
One fan, this fan are connected in axle and are arranged in fan chamber by air intlet waste gas is drawn into and this waste gas is upwards blown out by annular space; And
One motor, this motor be linked in the supporting cavity the axle with rotary fan;
Wherein, annular space shrinks to form a nozzle at the top of outer wall.
2. exhaust fan assembly as claimed in claim 1 is characterized in that this assembly parts comprises a plenum system, and this system is anchored on closed outer wall and is positioned at the below of air intlet, and this plenum system comprises:
One housing, this housing have a upper wall and a diapire, and this upper wall has a waste gas outlet of aiming at air intlet, and this diapire has an exhaust gas inlet that is used for admitting from the waste gas of a building; And
One bypass air intlet, this bypass air inlet are formed on the wall of housing to admit ambient air.
3. exhaust fan assembly as claimed in claim 2 is characterized in that, a windscreen is installed in the plenum system to control the amount of the ambient air that enters by bypass air inlet.
4. exhaust fan assembly as claimed in claim 1 is characterized in that, closed outer wall removably is anchored on plenum system, thereby this outer wall can be pulled down with place under repair or replacement.
5. exhaust fan assembly as claimed in claim 4 is characterized in that, this assembly parts comprises a dismountable passage panel, and this panel is formed on the sidewall of plenum system housing.
6. exhaust fan assembly as claimed in claim 1 is characterized in that, the upper end radially outward of closed inwall expands to form described nozzle.
7. exhaust fan assembly as claimed in claim 1, it is characterized in that, this assembly parts comprises a wind cover of the upper end that is installed on closed outer wall, this wind cover is a truncated cone, there is the opening of a circle lower end of this frustum, this lower end and described nozzle coaxial line and with described nozzle isoplanar.
8. exhaust fan assembly as claimed in claim 7 is characterized in that, the lower end radially outward of wind cover expands to form an inlet bell.
9. exhaust fan assembly as claimed in claim 7 is characterized in that, is formed with a cylindrical ring in the upper end of wind cover.
10. exhaust fan assembly as claimed in claim 1 is characterized in that, closed inwall extends up on the nozzle, and this assembly parts comprises:
One second nozzle assembly for fluid, this nozzle assembly for fluid are installed on closed inwall and have a truncated cone, and there is the opening of a circle upper end of this frustum, the inwall coaxial line of this upper end and closure and with the isoplanar, top of the inwall of closure; And
One wind cover, this wind cover are installed on second nozzle assembly for fluid and have a truncated cone, and there is the opening of a circle lower end of this frustum, this lower end and closed inwall coaxial line and with the isoplanar, top of the inwall of closure.
11. exhaust fan assembly as claimed in claim 10 is characterized in that, second nozzle assembly for fluid has a circular open in its lower end, this lower end and closed inwall coaxial line and with the nozzle isoplanar.
12. exhaust fan assembly as claimed in claim 1, it is characterized in that, one conduit wall forms a passage from the outside of assembly parts in supporting cavity, this conduit wall extends through the annular space between closed inwall and the closed outer wall, and this passage makes the people can touch axle and relevant driving element to check or to repair.
13. exhaust fan assembly as claimed in claim 12 is characterized in that, motor mounting is on the outer wall of closure, and the drive unit that extends through passage links to each other motor with axle.
14. exhaust fan assembly as claimed in claim 12, it is characterized in that, one second channel wall forms a second channel from the outside of assembly parts in supporting cavity, this second channel wall extends through the annular space between closed inwall and the closed outer wall, ambient air be drawn in the described passage and the top of flowing out closed inwall with air mixing by described nozzle discharge.
15. exhaust fan assembly as claimed in claim 14 is characterized in that, a top board is placed in the supporting cavity and above axle, thereby the protection axle is not entered the influence of material on the top of closed wall.
16. exhaust fan assembly as claimed in claim 1 is characterized in that, fan comprises all auxiliary blades, and these blade pass are crossed the crack suction air between supporting cavity and the fan chamber, and the air radially outward is blown in the annular space.
17. one kind with exhaust fan assembly as claimed in claim 1 be installed in one the building the roof on method, this method may further comprise the steps:
A) plenum system is installed on the roof, the air intlet on the bottom of this plenum system is aimed at extending through an exhaust asending pipe, and this plenum system has four walls that have detachable panel;
B) panel is optionally pulled down to form a bypass air intlet therein from a wall of plenum system;
C) fan housing is installed on plenum system, this fan housing covers bypass air inlet; And
D) described combination of fans part is installed in plenum system the top one the outlet the top;
Wherein, the physical planning that each installation is required is depended in the selection of the panel that pull down.
18. method as claimed in claim 17 is characterized in that, this method comprises:
E) optionally one second panel is pulled down from another wall of plenum system; And
F) to adjoining one second plenum system repeating step that first plenum system installs a) to e), the wall that these two quilts remove second panel is adjacent to each other.
19. a plenum system that is used for exhaust fan assembly as claimed in claim 1 comprises:
One rectangular bottom wall;
Four sidewalls, these four sidewalls link to each other with diapire and extend upward to form a chamber from diapire;
One bypass air intlet, this bypass air inlet is formed on one of all described sidewalls;
One fan housing, this fan housing are installed on the sidewall and from this sidewall and stretch out;
Transportation work style is kept off on one side, and this bypass windscreen is installed in the bypass air inlet and is positioned under the fan housing; And
One passage panel, this passage panel are formed on another plenum system sidewall, and this makes can pass in and out chamber to safeguard.
20. plenum system as claimed in claim 19 is characterized in that, this plenum system comprises a roof, and this roof has an air outlet slit that is formed at wherein; And
One isolated windscreen, this windscreen is slidably mounted in the air outlet slit, thereby can will should pull down to safeguard by isolated windscreen easily.
21. plenum system as claimed in claim 19 is characterized in that, a passage panel is formed on each of two remaining sidewalls, thereby can any side from three sides of plenum system enter chamber.
22. a plenum system that is used for exhaust fan assembly as claimed in claim 1 comprises:
One rectangular bottom wall;
Four sidewalls, these four sidewalls link to each other with diapire and extend upward to form a chamber from diapire;
One bypass air intlet, this bypass air inlet is formed on one of described all sidewalls;
One fan housing, this fan housing are installed on the described sidewall and have a top, and this top stretches out also downward-sloping to form dripping eaves from a described sidewall; And
One flange, this flange forms and advances the bypass air stream from the water droplet that these dripping eaves extend upward the top that tilts to avoid flowing through downwards along dripping eaves.
23. an exhaust fan assembly comprises:
The outer wall of one closure, this outer wall form a columniform chamber therein, and an air intlet is formed on the bottom of this cylindrical chamber;
The inwall of one closure, this inwall be anchored on closed outer wall and in cylindrical chamber between them, to form an annular space;
One fan, this fan are installed under the air intlet and can operate this fan so that waste gas is blown in the annular space through air intlet; And
One nozzle, this nozzle expands the top that is formed on inside and outside wall by the top radially outward that makes inwall.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53760904P | 2004-01-20 | 2004-01-20 | |
| US60/537,609 | 2004-01-20 | ||
| US58807404P | 2004-07-15 | 2004-07-15 | |
| US60/588,074 | 2004-07-15 | ||
| US10/984,052 | 2004-11-09 | ||
| US10/984,052 US7682231B2 (en) | 2004-01-20 | 2004-11-09 | Exhaust fan assembly |
| PCT/US2005/001968 WO2005072258A2 (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101018947A CN101018947A (en) | 2007-08-15 |
| CN101018947B true CN101018947B (en) | 2011-09-07 |
Family
ID=37818197
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580006164 Pending CN1926384A (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly |
| CN 200580006173 Pending CN101133285A (en) | 2004-01-20 | 2005-01-19 | Pivotal direct drive motor for exhaust assembly |
| CN200580006162.5A Expired - Fee Related CN101018947B (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly, installation method and plenum system used for it |
| CN 200580006160 Active CN100504220C (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580006164 Pending CN1926384A (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly |
| CN 200580006173 Pending CN101133285A (en) | 2004-01-20 | 2005-01-19 | Pivotal direct drive motor for exhaust assembly |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580006160 Active CN100504220C (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN1926384A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031295A1 (en) * | 2010-09-03 | 2012-03-08 | Twin City Fan Companies, Ltd. | Tubular inline exhaust fan assembly |
| MX344630B (en) * | 2011-06-14 | 2017-01-03 | Greenheck Fan Corp | Variable-volume exhaust system. |
| CN202646062U (en) * | 2011-11-09 | 2013-01-02 | 余姚市华昌电器制造有限公司 | Bladeless fan |
| CN103353119A (en) * | 2013-06-27 | 2013-10-16 | 青岛华瑞丰机械有限公司 | Device for increasing smoke emission height of chimney |
| GB2528707A (en) * | 2014-07-29 | 2016-02-03 | Dyson Technology Ltd | A fan assembly |
| CN105444279B (en) * | 2014-09-30 | 2018-07-06 | 青岛海高设计制造有限公司 | Environment regulating device and environment adjustment method |
| CN105444278B (en) * | 2014-09-30 | 2018-06-19 | 青岛海高设计制造有限公司 | Electromechanical assembly and its maintaining method |
| US10293839B2 (en) | 2015-12-03 | 2019-05-21 | Amsted Rail Company, Inc. | Railway car truck with friction damping |
| CN107278918B (en) * | 2017-07-31 | 2021-01-26 | 谢然 | Ventilation unit for livestock farm |
| CN109026117A (en) * | 2018-08-29 | 2018-12-18 | 上海诺地乐通用设备制造有限公司 | A kind of jet blower |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3584968A (en) * | 1969-10-06 | 1971-06-15 | Howard I Furst | Fan construction |
| US4344370A (en) * | 1980-07-24 | 1982-08-17 | Industrial Air, Inc. | Apparatus for discharging exhaust gas at high velocity |
| US4806076A (en) * | 1988-02-22 | 1989-02-21 | Strobic Air Corporation | Radial upblast exhaust fan apparatus |
| US5439349A (en) * | 1994-11-15 | 1995-08-08 | Kupferberg; Minel | Exhaust fan apparatus |
| CN1111746A (en) * | 1993-10-25 | 1995-11-15 | 扎纽斯基·米歇尔 | Improved unit which can be assembled to forming smoke removing and ventilating apparatus of various location |
| US6112850A (en) * | 1999-09-07 | 2000-09-05 | Met Pro Corporation | Acoustic silencer nozzle |
-
2005
- 2005-01-19 CN CN 200580006164 patent/CN1926384A/en active Pending
- 2005-01-19 CN CN 200580006173 patent/CN101133285A/en active Pending
- 2005-01-19 CN CN200580006162.5A patent/CN101018947B/en not_active Expired - Fee Related
- 2005-01-19 CN CN 200580006160 patent/CN100504220C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3584968A (en) * | 1969-10-06 | 1971-06-15 | Howard I Furst | Fan construction |
| US4344370A (en) * | 1980-07-24 | 1982-08-17 | Industrial Air, Inc. | Apparatus for discharging exhaust gas at high velocity |
| US4806076A (en) * | 1988-02-22 | 1989-02-21 | Strobic Air Corporation | Radial upblast exhaust fan apparatus |
| CN1111746A (en) * | 1993-10-25 | 1995-11-15 | 扎纽斯基·米歇尔 | Improved unit which can be assembled to forming smoke removing and ventilating apparatus of various location |
| US5439349A (en) * | 1994-11-15 | 1995-08-08 | Kupferberg; Minel | Exhaust fan apparatus |
| US6112850A (en) * | 1999-09-07 | 2000-09-05 | Met Pro Corporation | Acoustic silencer nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1926384A (en) | 2007-03-07 |
| CN101133285A (en) | 2008-02-27 |
| CN100504220C (en) | 2009-06-24 |
| CN101018947A (en) | 2007-08-15 |
| CN101065618A (en) | 2007-10-31 |
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