CN2564783Y - Axial rear flow fan - Google Patents
Axial rear flow fan Download PDFInfo
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- CN2564783Y CN2564783Y CN 02268711 CN02268711U CN2564783Y CN 2564783 Y CN2564783 Y CN 2564783Y CN 02268711 CN02268711 CN 02268711 CN 02268711 U CN02268711 U CN 02268711U CN 2564783 Y CN2564783 Y CN 2564783Y
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- impeller
- lobe dish
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Abstract
The utility model discloses an axial rear flow fan belonging to the technical field of air purification. The utility model comprises a casing, an impeller wheel on which an impeller disc is arranged, a fan inlet and a fan outlet. The utility model is characterized in that the utility model is also provided with a rear flow object sucking mouth which is arranged on the axial lateral wall of a machine body of the utility model and is directly communicated with a gas path at the outer side of the impeller wheel in the machine body; a gas path at the radial outer side of the impeller wheel in the machine body axially forms an expanding shape towards the other side of the machine body along the impeller wheel from the axial side of the machine body. Compared with an existing fan, the utility model has the advantages of strong pumping power, large flow rate, low energy consumption, high efficiency and more functions. The corrosive wear degree of through-flow components in the machine body can be lightened. The utility model is an ideal vicarious product for a fan.
Description
Technical field
The utility model relates to a kind of axial rear flow fan of handling dusty gas, belongs to the air purifying process field.
Background technique
The blower fan of people's use now all is the suction function suction dusty gas material that relies on impeller to form in air inlet; the suction capactity of existing ventilator intake grill is poor; and the dusty gas material must pass through impeller; and dusty gas is when the impeller; under action of centrifugal force, can isolate a large amount of grease contamination materials and stick to the body inboard; cause the body passage component seriously polluted; simultaneously; the dust grains of sand in the dusty gas impeller that also can rub; cause damage in impeller serious; if what be sucked is the pH value gaseous matter; also can cause impeller and other passage components by heavy corrosion; in addition, existing various blower fan function singlenesses, using scope is narrow.
Summary of the invention
The purpose of this utility model is to provide a kind of suction capactity strong, and gas flow is big, and power consumption is few, the efficient height, and function is many, and can alleviate the interior passage component of body by axial rear flow fan stained and corrosion.
The utility model is realized by the following technical programs:
A kind of axial rear flow fan, include casing, impeller, air inlet, fan outlet, its special way is, also be provided with back stream and inhale the thing mouth, back stream inhale that the thing mouth is located on the body axial side wall and with body in impeller outside air flue directly be communicated with, the impeller radial outside air flue in the body from axis to a side along impeller shaft to become expansion shape towards the body opposite side.
Casing of the present utility model can be designed as multiple different shape, as multiple different shapes such as scroll casing shape, tubulars.Draught fan impeller can directly adopt (mainly being centrifugal) of existing blower fan, impeller that also can the special use of otherwise designed the utility model.
Before setting forth hereinafter, explain following technical term earlier:
Body perpendicular to impeller shaft to side, sidewall be called body axial sides, sidewall, body be parallel to impeller shaft to side, sidewall be called body radial side, sidewall.The position of impeller and region of interest thereof are pointed to identical with body, impeller perpendicular to impeller shaft to side, sidewall be called impeller axial sides, sidewall, impeller be parallel to impeller shaft to side, sidewall be called impeller radial side, sidewall.Organism sidewall comprises body axial side wall and radial sidewalls.The axial side wall that body is provided with air inlet is called front axle to sidewall, and another axial side wall of body is called axially sidewall of back; Dui Ying impeller both sides are called front axle to the axial side in side and back with it, and Dui Ying leaf dish is called frontal lobe dish and posterior lobe dish with it.What impeller outside air flue referred to is exactly impeller outer sidewind passage, and impeller outside air flue comprises impeller radial outside air flue and impeller shaft air flue laterally; Impeller radial outside air flue is meant the air-flow path that the impeller radial side is outer, and impeller shaft air flue laterally is meant the air-flow path that the impeller axial sides is outer.Impeller radial outside air flue comprise the impeller radial outside over against the impeller radial side and over against about the impeller radial side (up and down) be parallel to impeller shaft to air-flow path (not comprising fan outlet); Impeller shaft air flue does not laterally comprise the air inlet position.Blade radial is of a size of length of blade, and sharf is to being of a size of width of blade.Blade is the blade rear portion near the impeller outlet part.
The utility model adopts the working principle absolutely different with having blower fan now, it is the suction function suction ambient atmos material that directly utilizes the high velocity air (high velocity airs before and after the impeller outlet) after Impeller Machining, the effect that back stream is inhaled the thing mouth by means of the suction function of high velocity air before and after the impeller outlet directly from the external world in casing inspiration gaseous matter in the air flue of the impeller outside.
Back stream is inhaled the thing mouth and is located on the body axial side wall, in other words on the arbitrary axial side wall of body or back stream suction thing mouth can be set on any position of its two axial sidewalls simultaneously.Back stream is inhaled the thing mouth and is followed the interior impeller of body outside air flue directly to be communicated with, and it can be communicated with impeller radial outside air flue in other words, also can follow impeller shaft air flue connection laterally, also can be simultaneously not only with impeller radial outside air flue but also with impeller shaft air flue connection laterally.That is to say it both can be before have axially utilized impeller outlet the suction function suction ambient atmos material of (in the impeller) high velocity air, again can be from radially utilizing the suction function suction ambient atmos material of (impeller outlet) high velocity air behind the impeller outlet.
Back stream is inhaled the thing mouth can be designed to various ways such as circle, arc, ring, semi-round ring shape, arc.Back stream inhale thing mouth wind-exposuring area can less than, equal, greater than the impeller axial sides area of a circle.
Impeller radial outside air flue from axis to a side along impeller shaft to become expansion shape towards the body opposite side, be meant impeller radial outside air flue can from the body front axle after sidewall plays body axially sidewall open thick increasing gradually, Dui Ying casing radial sidewalls is planar to side wall perimeter edge axial outward-dipping gradually planar or approximate conically shaped of conically shaped that forms of sidewall behind the body from the body front axle with it.The impeller radial outside air flue of this expansion shape also can expand thick increasing to the casing front axle to sidewall from axial sidewall behind the casing.Whole impeller radial outside air flue can all be this expanded form, also can partly be this expanded form.It can be uniformly that this expansion shape impeller radial outside air flue turns to each position along impeller, also can be uneven.Impeller radial outside air flue can also be on above-mentioned this basis turn to axially or radial dilatation along impeller, or simultaneously existingly axially becomes radial dilatation again.Whole impeller radial outside air flue can be a kind of geometrical shape, also can be the assemblying body of several geometrical shapies.
In order to guarantee that the gas in the air flue of the body internal lobe wheel radial outside definitely can not overflow body in back stream suction thing mouth, guarantee that back stream suction thing mouth can aspirate the ambient atmos material more fully, can also be provided with back conductance flow in the impeller radial outside air flue, back conductance flow can connect with organism sidewall, it can be connected with the body axial side wall in other words, also can be connected with the body radial sidewalls.Back conductance flow can be straight plate shape, can be circular arc, also can be airfoil.The water conservancy diversion direction of back conductance flow is to tilt to point to the axial edge of impeller radial outside air flue by turning to along impeller in the impeller radial outside air flue.
Leaf dish of the present utility model can use the existing structure form, as: on an impeller, be provided with the disc posterior lobe dish that ring frontal lobe dish that width equates with the blade radial span and radius equate with impeller radius simultaneously, or only be provided with the disc posterior lobe dish that radius equates with impeller radius separately.Leaf dish that also can the special use of otherwise designed the utility model, leaf blade disk of the present utility model can have following feature:
First kind of leaf dish structure characteristic is, be provided with ring frontal lobe dish at the impeller front axle to the side, frontal lobe dish and blade connect, the width of ring frontal lobe dish equates with the blade radial span, axial side is provided with disc posterior lobe dish behind the impeller, the posterior lobe dish connects with blade, and the radius of posterior lobe dish (from the axle center to leaf dish outer circular edge) is less than impeller axial sides circle radius (distance from impeller axial sides circumferential edges to the impeller axle center).The rear portion of the sideways blade of this impeller rear axle is exposed to posterior lobe dish periphery.Adopt this kind structural type, be again axially to be provided with back stream suction thing mouth on the sidewall behind the body, during work, back stream is inhaled in the thing mouth, the suction function of existing impeller outlet high velocity air, have the impeller blade rear portion also not discharge the suction function of the high velocity air of impeller again, the pumping action of whole back stream suction thing mouth can be very strong.
Second kind of leaf dish structure characteristic is, on the side, be provided with ring frontal lobe dish at the impeller front axle, the frontal lobe dish connects with impeller blade, and the width of ring frontal lobe dish is less than the impeller blade radial span, and the rear portion of the sideways impeller blade of this impeller front axle is exposed to frontal lobe dish periphery.This kind structure makes the sideways posterior lobe dish of impeller rear axle can form three kinds of structural types again, the first is not established the posterior lobe dish, it two is to be provided with the disc posterior lobe dish of radius less than impeller axial sides circle radius, and it three is to be provided with the disc posterior lobe dish that radius equals impeller axial sides circle radius.
This kind frontal lobe dish structural type and corresponding several structural types of posterior lobe dish thereof suit to flow after the arbitrary axial side wall of body is provided with and inhale the thing mouth or all establish back stream suction thing mouth at body two axial sidewalls.Especially, inhale the thing mouth if on sidewall, be provided with back stream at the body front axle, during work, existing back stream is inhaled the thing mouth by the high velocity air at the rear portion of impeller blade and the suction function suction ambient atmos material of impeller blade outlet port high velocity air, the suction function suction ambient atmos material of air inlet is arranged again, and suction intensity and suction flow that the suction intensity of complete machine can be more single than air inlet are much bigger.
The third leaf dish structure characteristic is, do not establish the frontal lobe dish on impeller, only establish disc posterior lobe dish, the posterior lobe dish connects with blade, the radius of posterior lobe dish is less than impeller axial sides circle radius, and the rear portion of the sideways blade of this impeller rear axle is exposed to posterior lobe dish periphery.This structural type, if axially be provided with back stream suction thing mouth on the sidewall behind the body, its pumping action is the same substantially with first kind of leaf dish structural type.
Different leaf dish structural type has determined the different performance characteristics of the different suction effect of blower fan, and the function of visible the utility model leaf dish is not exclusively the same with the function of existing blower fan leaf dish.
Suction effect that the utility model is different and performance characteristics thereof can also add corresponding part by inhaling in the thing mouth at back stream, or be realized it by the different structure of casing corresponding site.For example, effect and performance characteristics that above-mentioned second kind of leaf dish structural type produces, if do not establish the leaf dish in impeller two axial sides, only after establishing a circular intake grill and a ring simultaneously, sidewall flows suction thing mouth at the body front axle, the radial span of the distance of thing mouth internal circle edge less than impeller blade inhaled to back stream in the air inlet edge, allow the blade rear portion be exposed to ring after stream inhale in the thing mouth.Like this, blower fan can be obtained with second kind of suction effect and performance characteristics that leaf dish structural type is same.Again for example, the third leaf dish structural type, can not establish the leaf dish in impeller two axial sides equally, stream was inhaled the thing mouth after only axially sidewall was provided with circle behind the body of not establishing air inlet, again after stream is after this inhaled thing mouth and impeller between the axial side, add one and press close to the sideways circular barge board of impeller shaft, this circular barge board radius is less than impeller axial sides circle radius, allow the impeller blade rear portion be exposed to circular barge board periphery, during work, can obtain with the third leaf same effect and the performance characteristics of dish structural type.
The effect of all the other several leaf dish structures can and add mode such as barge board parts and realized by the casing corresponding site, has not just given unnecessary details one by one at this.
If more than the special structure form of several leaf dishes design ingenious, allow blade rear portion suitable position be exposed to the posterior lobe dish periphery or the frontal lobe dish excircle outside, the suction function of before only allowing the impeller edge export and outlet back high velocity air aspirates the ambient atmos material, high velocity air herein can produce very strong negative pressure-pumping ambient atmos material, because it is to spray to the impeller outside at a high speed, can effectively stops the contact of ambient atmos material or enter impeller again.This structural type during use, allows the air inlet inspiration clean gas material medium of working, and specially allows back stream inhale thing mouth suction outside contamination gaseous matter, and like this, not only suction effect is good, can also avoid stained corrosion impeller blade.
In a word, the utility model owing to adopted utilizes the working principle of the suction function suction ambient atmos material of high velocity air after the impeller outlet anteroposterior diameter Impeller Machining, structure is special again, compare with existing blower fan, its suction capactity is strong, and flow is big, power consumption is few, the efficient height, function is many, and can alleviate the corrosive wear degree of passage component in the body.
Description of drawings
Fig. 1-a kind of structural representation of the present utility model;
The overall structure schematic representation of Fig. 2-Fig. 1;
Fig. 3-second kind of structural representation of the present utility model;
The overall structure schematic representation of Fig. 4-Fig. 3;
Fig. 5-the third structural representation of the present utility model;
The overall structure schematic representation of Fig. 6-Fig. 5;
Fig. 7-the 4th kind of structural representation of the present utility model;
The overall structure schematic representation of Fig. 8-Fig. 7.
Provide embodiment below in conjunction with accompanying drawing, the utility model is further elaborated.
Embodiment
Embodiment 1
With reference to figure 1, Fig. 2, a kind of axial rear flow fan, it has scroll casing shape casing 1, press impeller 2 (blade is long and narrow) in centrifugal, air inlet 3, fan outlet 4, circular back stream is inhaled thing mouth 5, air inlet 3 (comprising impeller suction port 10) and impeller motor 12 are located at the same axial sides of body (front axle is to the side), back stream is inhaled and axially is communicated with impeller outside air flue in the body on the sidewall after thing mouth 5 is located at body, body internal lobe wheel radial outside air flue 8 becomes expansion shape along impeller shaft to an axial side behind body to a side from the body front axle, the tapered tube of Dui Ying casing radial sidewalls is planar with it, impeller radial outside air flue 8 is from the snail tongue, suitable impeller turns to and also becomes axial expansion gradually, and circular back stream is inhaled the radius of thing mouth 6 and followed the axial sides circle radius of impeller 2 to equate.Do not establish the frontal lobe dish on the impeller 2 and only establish disc posterior lobe dish 9, posterior lobe dish 9 connects with impeller blade 11, and the radius of posterior lobe dish 9 equates that with impeller axial sides circle radius the sideways blade 11 of impeller rear axle is all sheltered from by posterior lobe dish 9.
During work, gas enters impeller by air inlet 3 and impeller suction port 10, be processed to high velocity air, arranged in impeller radial outside air flue 8 through impeller outlet then, high velocity air produces negative pressure, inhale thing mouth 5 suction ambient atmos materials by back stream, the ambient atmos material that suction is advanced is by discharging body through fan outlet 4 again behind the impeller radial outside air flue 8.Because impeller is provided with posterior lobe dish 9, posterior lobe dish 9 all shelters from the sideways blade 11 of impeller rear axle again, in the working procedure, through after the stream ambient atmos material of inhaling 5 inspirations of thing mouth can not enter impeller 2, can not contact impeller blade 11, again owing to 8 the past of impeller radial outside air flue axial sides is axially expanded the side to the back, axially the side is outward-dipping to the back for casing radial sidewalls the past axial sides, whole impeller radial outside air flue also becomes axial expansion simultaneously, because these measures, the gas in the impeller radial outside air flue can not overflowed body through the thing of stream suction later mouth.Back stream is inhaled in the thing mouth 5 and excessive air-flow do not occurred.Back stream is inhaled the suction function suction ambient atmos material that thing mouth 5 just can utilize impeller outlet place high velocity air fully.
If present embodiment is in order to ventilation, and in the work, the pumping action of existing air inlet 3 has the back to flow the pumping action of inhaling thing mouth 5 again, compares with existing equal-wattage blower fan, and the suction amount is big, flow big, save the energy, efficient height, is conspicuous.
Uses such as the dirty gaseous matter of all right suction of present embodiment, junk.In the work, allow the air inlet inspiration clean air medium of working, allow back stream inhale thing mouth suction dusty gas material, junk etc.Can greatly alleviate impeller like this by stained corrosion strength.
Present embodiment, add the fixed circular barge board that a radius equates with the posterior lobe dish if inhale thing mouth 5 inner close fitting posterior lobe Pan9Chu at back stream, like this, because blocking of barge board arranged, through after stream any gaseous matter of inhaling the inspiration of thing mouth will definitely can not contact the leaf blade disk, this kind structural type especially adapts to lampblack suction exhausting to be used, and not only can avoid stained impeller during lampblack suction exhausting, can also avoid grease soiling solution severe contamination body inner wall.
With reference to figure 3, Fig. 4, this example is similar with embodiment's 1 basic structure, different is conductance flow 7 after being provided with 4 in the impeller radial outside air flue 8, back conductance flow 7 connects with the casing radial sidewalls, and back conductance flow 7 is turned to by suitable impellers in the impeller radial outside air flue 8 and tilts to point to the back axial sidewall edge of impeller radial outside air flue.Second difference is that this example is provided with ring frontal lobe dish 6, frontal lobe dish 6 width equate with blade 11 radial span, the sideways blade 11 of impeller front axle is all sheltered from by frontal lobe dish 6, simultaneously also be provided with disc posterior lobe dish 9 in another axial sides of impeller, the radius of posterior lobe dish 9 is less than impeller axial sides circle radius, and the rear end of blade 11 is exposed to the periphery of posterior lobe dish 9.
During work, because the suction function of two place's high velocity airs in the impeller radial outside air flue 8 after preceding blade 11 rear end of impeller outlet and the outlet is arranged, inhale thing mouth 6 suction ambient atmos materials by back stream, so the suction of this routine ratio 1 can be stronger, the suction amount can be bigger.
This example is because blade 11 rear end, it is near the periphery that the position is exposed to posterior lobe dish 9 blade exit, it is short and small that blade 11 rear portions are exposed to the position of posterior lobe dish periphery in other words, high velocity air during work before and after the impeller outlet can aspirate the ambient atmos material effectively, can stop ambient atmos material contact impeller blade again.During work,, only allow back stream inhale thing mouth 5 suction outside contamination gaseous matters, can guarantee good suction effect, can guarantee that again impeller blade is not by stained corrosion if allow air inlet inspiration clean gas material make the work medium.
This example can make dusty gas definitely can not contact the leaf dish again if add radius with the barge board that posterior lobe dish radius equates pressing close to posterior lobe Pan Chu during work, can prevent the contaminated and corrosion of uppermost leaf dish.
This routine function and example 1 the same substantially.
With reference to figure 5, Fig. 6, this example is the same substantially with example 1, and different is these routine posterior lobe dish 9 radiuses are less than impeller axial sides circle radius, and the sideways blade of impeller rear axle rear portion is exposed to posterior lobe dish 9 periphery.Second difference is that the back stream of this example is inhaled the radius of thing mouth 5 less than impeller axial sides circle radius.
During work, owing to the suction function that impeller outlet front and back two place's high velocity airs are arranged, the pumping action of inhaling thing mouth 5 is flowed in the back can be more much bigger than embodiment 1, again owing to stream suction thing after this example is young, so its suction is just strong especially.
Uses such as present embodiment is suitable does sweeping machine, sweeper, vacuum cleaner, draw water, conveying material.
Suitable suction liquid of this example and conveying material use.
This routine accompanying drawing slightly.
With reference to figure 7, Fig. 8, this example is similar with the basic structure of example 1, but this routine air inlet 3 and impeller suction port 10 are divided into axis to both sides with impeller motor 12, this example is not established the posterior lobe dish and is only established ring frontal lobe dish 6, the width of ring frontal lobe dish 6 is less than the radial span of blade 11, and blade 11 rear portions are exposed to the periphery of frontal lobe dish 6.It is ring that this example back stream is inhaled thing mouth 5, stream suction thing mouth 5 exradius equate with impeller axial sides circle radius behind the ring, circle radius is less than impeller axial sides circle radius in it, and blade 11 rear portions are exposed to the excircle outside of frontal lobe dish 6, is exposed to back stream and inhales among the thing mouth 5.During the work of this example, both can make air inlet 3 and back stream inhale thing mouth 5 and aspirate simultaneously, and can make air inlet 3 inhale thing mouth 5 again and aspirate two kinds of different gaseous matters respectively with back stream with a kind of gaseous matter.
This example does ventilation or air blast is used, inhaling thing mouth 5 by air inlet 3 and back stream aspirates in the same direction with a kind of gaseous matter, suction is big, flow is big, if by pipeline, make the air inlet 3 suction clean airs medium of working, and only allow behind the ring stream inhale thing mouth 5 suction dusty gas materials, then present embodiment can be made suction dusty gas material again and uses.
Present embodiment frontal lobe dish 6 roles can also be finished by the structure of casing corresponding site, specific practice is exactly, do not establish the frontal lobe dish, and only be provided with ring casing axial side wall in air inlet 3 outsides, stream is inhaled thing mouth 5 behind this ring casing axial side wall arranged outside ring again, makes the impeller blade rear portion be exposed to back stream and inhales among the thing mouth 5.
This example is the same substantially with example 5, different is that this example also is provided with the disc posterior lobe dish 9 of radius less than impeller axial sides circle radius, second difference is that this example stream after also being provided with ring on the axial side behind the body is inhaled thing mouth 5, and the back stream of body front axle on the axial sidewall in sidewall and back is inhaled the suction function suction ambient atmos material that the thing mouth can all utilize impeller outlet front and back high velocity air simultaneously.During work, inhale the thing mouth by the back stream on air inlet 3 and the body two axial sidewalls and aspirate simultaneously with a kind of gaseous matter, suction suction amount is more much bigger than existing blower fan.This example especially suits to do ventilation and uses.
This routine accompanying drawing slightly.
Claims (7)
1, axial rear flow fan, include casing (1), impeller (2), air inlet (3), fan outlet (4), impeller (2) is provided with the leaf dish, it is characterized in that, also be provided with back stream and inhale thing mouth (5), back stream inhale that thing mouth (5) is located on the body axial side wall and with body in impeller outside air flue directly be communicated with, the impeller radial outside air flue (8) in the body from axis to a side along impeller shaft to become expansion shape towards the body opposite side.
2, axial rear flow fan according to claim 1, it is characterized in that, be provided with back conductance flow (7) in the impeller radial outside air flue (8), back conductance flow (7) connects with organism sidewall, and back conductance flow (7) is turned to by suitable impeller in the impeller radial outside air flue (8) and tilts to point to the axial edge of impeller radial outside air flue (8).
3, axial rear flow fan according to claim 1 and 2, it is characterized in that, front axle at impeller (2) is provided with ring frontal lobe dish (6) on the side, frontal lobe dish (6) is connected with blade (11) on the impeller, the width of frontal lobe dish (6) equates with the radial span of blade (11), on the back axial side of impeller (2), be provided with disc posterior lobe dish (9), posterior lobe dish (9) is connected with blade (11), the radius of posterior lobe dish (9) is less than the axial sides circle radius of impeller (2), and the rear portion of the sideways blade of this impeller rear axle (11) is exposed to the periphery of posterior lobe dish (9).
4, axial rear flow fan according to claim 1 and 2, it is characterized in that, front axle at impeller (2) is provided with ring frontal lobe dish (6) on the side, frontal lobe dish (6) is connected with blade (11) on the impeller, the width of frontal lobe dish (6) is less than the radial span of blade (11), the rear portion of the sideways blade of this impeller front axle (11) is exposed to the periphery of frontal lobe dish (6), on the back axial side of impeller (2), be provided with disc posterior lobe dish (9), posterior lobe dish (9) is connected with blade (11), the radius of posterior lobe dish (9) is less than the axial sides circle radius of impeller (2), and the rear portion of the sideways blade of this impeller rear axle (11) is exposed to the periphery of posterior lobe dish (9).
5, axial rear flow fan according to claim 1 and 2, it is characterized in that, front axle at impeller (2) is provided with ring frontal lobe dish (6) on the side, frontal lobe dish (6) is connected with blade (11) on the impeller, the width of frontal lobe dish (6) is less than the radial span of blade (11), the rear portion of the sideways blade of this impeller front axle (11) is exposed to the periphery of frontal lobe dish (6), on the back axial side of impeller (2), be provided with disc posterior lobe dish (9), posterior lobe dish (9) is connected with blade (11), and the radius of posterior lobe dish (9) equals the axial sides circle radius of impeller (2).
6, axial rear flow fan according to claim 1 and 2, it is characterized in that, front axle at impeller (2) is provided with ring frontal lobe dish (6) on the side, frontal lobe dish (6) is connected with blade (11) on the impeller, the width of frontal lobe dish (6) is less than the radial span of blade (11), the rear portion of the sideways blade of this impeller front axle (11) is exposed to the periphery of frontal lobe dish (6), does not establish the posterior lobe dish on the back axial side of impeller (2).
7, axial rear flow fan according to claim 1 and 2, it is characterized in that, front axle at impeller (2) is not established the frontal lobe dish on the side, and on the back axial side of impeller (2), be provided with disc posterior lobe dish (9), posterior lobe dish (9) is connected with blade (11) on the impeller, the radius of posterior lobe dish (9) is less than the axial sides circle radius of impeller (2), and the rear portion of the sideways blade of this impeller rear axle (11) is exposed to the periphery of posterior lobe dish (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02268711 CN2564783Y (en) | 2002-07-31 | 2002-07-31 | Axial rear flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02268711 CN2564783Y (en) | 2002-07-31 | 2002-07-31 | Axial rear flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2564783Y true CN2564783Y (en) | 2003-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02268711 Expired - Fee Related CN2564783Y (en) | 2002-07-31 | 2002-07-31 | Axial rear flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2564783Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073562A1 (en) * | 2003-10-24 | 2005-08-11 | Junhao Lin | Multifunctional back-flowing type strong suction blower |
-
2002
- 2002-07-31 CN CN 02268711 patent/CN2564783Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073562A1 (en) * | 2003-10-24 | 2005-08-11 | Junhao Lin | Multifunctional back-flowing type strong suction blower |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |