CN2510653Y

CN2510653Y - Multifunctional back-flow fan

Info

Publication number: CN2510653Y
Application number: CN 01261290
Authority: CN
Inventors: 林钧浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-22
Filing date: 2001-08-22
Publication date: 2002-09-11
Anticipated expiration: 2011-08-22

Abstract

The utility model discloses a multifunctional back-flow fan, belonging to the technical field of the air purification. The multifunctional back-flow fan comprises a housing, impellers and an air outlet. The multifunctional back-flow fan is characterized in that the axial lateral surface of the engine body is provided with a back flow suction opening; the edge of the periphery of the back flow suction opening is connected with a housing; the back flow suction opening is directly communicated with an airflow channel at the outer side of the impeller in the housing from the outside to the inside; the back flow suction opening is provided with a wind-blocking back flow device; the wind-blocking back flow device comprises a wind-blocking surface and a wind-return surface, wherein the wind-blocking surface is directly connected with the wind-return surface; the wind-blocking surface is connected with the edge of the periphery of the back flow suction opening; the wind-return surface points to the airflow channel at the outer side of the impeller from the outside to the inside. The utility model has the advantages of big suction energy, high efficiency, and can greatly lighten the pollution degree of the impellers and the engine block and prolong the service life of the fan. The multifunctional back-flow fan has various functions that the general fan does not have, and is an ideal changed product of the fan.

Description

Multi-functional rear flow fan

The utility model relates to a kind of multi-functional rear flow fan of handling dusty gas, belongs to the air purifying process field.

The blower fan of people's use now and ventilation fan all are to rely on the impeller rotation that is located in the intake grill to produce pumping action suction flue gas pollutant; the suction capactity of existing general blower fan and ventilation fan intake grill is poor; and during dusty gas process impeller; under action of centrifugal force, can isolate a large amount of grease contamination and stick to internal body; cause the body passage component seriously polluted; and the impeller that also can rub of the dust grains of sand in the dusty gas; cause damage in impeller serious; in addition; existing blower fan and ventilation fan function are single, and using scope is narrow.

The purpose of this utility model is to provide a kind of suction capactity strong, and gas flow is big, the efficient height, and function is many, and can alleviate the multi-functional rear flow fan that passage component is worn in the body.

The utility model is realized by the following technical programs:

A kind of multi-functional rear flow fan, include casing, impeller, exhaust outlet, its special way is that the body axial sides is provided with stream air sucking mouth, back, the peripheral edge of stream air sucking mouth, back connects with casing, stream air sucking mouth, back ecto-entad directly is communicated with impeller outside air-flow path in the casing, the place also is provided with the return channel that keeps out the wind in stream air sucking mouth, back, the return channel that keeps out the wind comprises the face of keeping out the wind and return air face two-part, its keep out the wind face and return air face directly connect together, the face that keeps out the wind of return channel of keeping out the wind connects with the peripheral edge of back stream air sucking mouth, and its return air face ecto-entad points to impeller outer sidewind passage.

Casing of the present utility model can be designed as different shapes, it can be general volute shape, also can be other difformities, be as the body radial side that approximate conically shaped is planar, the approximate circle column casing is planar, or approximate conically shaped face and cylindrical drum face combined type shape or the like.Body side vertical or that be diagonal to the impeller shaft axis can be provided with chassis sidewall, also can not establish chassis sidewall, can not establish air inlet commonly used on the whole casing, the draught fan impeller of the technical program can directly adopt (mainly being centrifugal) of existing blower fan, impeller that also can the special use of otherwise designed the utility model, whole impeller can be provided with suction port, also can not establish suction port, and impeller blade can be designed multi-form as required.

Stream air sucking mouth, back and the return channel of setting up that keeps out the wind thereof are critical components of the present utility model, their effect is to stop up the air-flow in the air-flow path of the interior impeller of the casing outside not outflow, and can aspirate the ambient atmos material by the suction function that high velocity air in the impeller outside air-flow path in the casing produces again.Stream air sucking mouth, back and the return channel of setting up that keeps out the wind thereof can be located on body one axial sides, also can be divided into simultaneously on the body two axial sides.Stream air sucking mouth, back can be a circle or sub-circular pore, also can be various ways such as an annular or arc pore, but no matter which kind of form all is directly to be communicated with impeller outside air-flow path in the body, introduces gaseous matter in impeller outer sidewind passage.

The body radial side is that cylindrical drum is planar, and its body two axial sides can all be provided with chassis sidewall, flows the air sucking mouth thereafter and can be located on any sidewall, or all be provided with simultaneously stream air sucking mouth, back on the two side, and stream air sucking mouth, back is suitable for being designed to annular or arc; If the body radial side is that approximate conically shaped is planar, the little side of body lateralarea then vertical or that be diagonal to the impeller shaft axis can not established enclosure wall, flows the air sucking mouth thereafter and can be designed to circular or sub-circular.

Impeller outside air-flow path is expanssion type gradually in the body, and this expanssion type gradually can radially be expanded gradually, can be axially expansion gradually, also can be that radial-axial is all expanded simultaneously.

The effect of the return channel that keeps out the wind that is provided with on the peripheral edge of stream air sucking mouth, back is that the interior air-flow of air-flow path can not be excessive outside stopping up the interior impeller of body, aspirate the ambient atmos material with stream air sucking mouth after preventing excessive interference in air flow, the return channel that keeps out the wind comprises the face of keeping out the wind and return air face two-part, the wind face of crossing of the whole return channel inboard of keeping out the wind does not have corner angle for well with slyness, and the transverse cross-sectional profile of the whole return channel that keeps out the wind can be various ways such as broken line shape, camber line shape, curvilinerar figure.Corresponding to the shape of stream air sucking mouth, back, the return channel that keeps out the wind can be the planar body of pillar buoy or the planar body of conically shaped of a whole circle, also can not be the planar body of pillar buoy or the planar body of conically shaped of a whole circle.

The working principle of rear flow fan is to utilize the suction function suction ambient atmos material of the air-flow after rotary blade is processed, so the utility model is named a day multi-functional rear flow fan, mainly gives to name according to this working principle.Owing to be subjected to the impeller action of centrifugal force, indrawn gaseous matter major part is barred from the impeller outer side flow, is discharged from body through exhaust outlet then, thereby can alleviate the stained degree of impeller.

In order to improve the efficient of multi-functional rear flow fan, increase its suction energy and gas flow, the utility model can also be provided with special-purpose body intake grill, special-purpose body intake grill is located on the body axial sides of impeller, and special-purpose body intake grill is directly introduced gas to impeller inside by the body outside.The special-purpose body intake grill of the technical program is similar with existing centrifugal blower intake grill, can set up in body one side, also can divide to be located at the body both sides.Be provided with the multi-functional rear flow fan of special-purpose body intake grill, gas through impeller suction port or the inspiration of impeller blade gap becomes high velocity air through Impeller Machining, after discharging by the impeller blade outlet again, can form stronger suction function in the impeller outside, thereby can make stream air sucking mouth, back aspirate more gaseous matter.

In order to prevent dusty gas material contact impeller or to enter impeller, guarantee that the not contaminated gaseous matter of impeller institute is stained, in order to make multi-functional rear flow fan have more function, can also be provided with the special impeller air sucking mouth on the impeller of the present utility model, the special impeller air sucking mouth is located at impeller suction port place and gives prominence to outside organism sidewall, the extraneous spatial communication of direct and body, directly special inspiration body outside gaseous matter.After being provided with the special impeller air sucking mouth, in casing, the space is isolated fully laterally with impeller shaft can to make the impeller inboard, make the special impeller air sucking mouth have suction to the body outside, and to the body inboard without any pumping action, so just can guarantee that the dusty gas that the impeller two end axles is sucked in the body laterally can not enter in the impeller.The special impeller air sucking mouth can be located at body one side, also can be located at the body both sides simultaneously.

Special impeller air sucking mouth structure is the simplest to be, can directly add a brachymemma pipe in impeller suction port outside and form.The special impeller air sucking mouth is unsuitable long, if necessary design is long, preferably can add suction port on its tube wall.

Be provided with the multi-functional rear flow fan of special impeller air sucking mouth, during work, the high velocity air after Impeller Machining can produce stronger suction function in the impeller outside, and its suction and flow can increase.If allow special impeller air sucking mouth inspiration clean gas; and allow the back flow air sucking mouth inspiration dusty gas; during work; after the high velocity air after the Impeller Machining is discharged impeller; can be close to impeller in the impeller outside and form the air film protective layer one, the dusty gas that passes through the inspiration of impeller outer sidewind passage does not contact, impeller does not does not wear and tear thereby make.This kind structural type is used if make induced draught fan, make the clean cool air of special impeller air sucking mouth inspiration, allow the back flow air sucking mouth inspiration high temperature dusty gas, during work, because the high temperature dusty gas of back stream air sucking mouth inspiration does not advance impeller and directly discharges body by fan outlet, and the clean cool air of special impeller air sucking mouth inspiration can strengthen the blower fan suction effect after Impeller Machining, and the cooling wheel of lowering the temperature again is so can make impeller be in the optimum Working for a long time.

Be provided with the multi-functional rear flow fan of special impeller air sucking mouth, its function can also be more, for example, allow special impeller air sucking mouth inspiration wash water mist, allow the back flow air sucking mouth inspiration dusty gas, during work, the wash water mist of special impeller air sucking mouth inspiration is through Impeller Machining and after discharging impeller, since its than great, speed is high, penetrating power is strong, can wash dusty gas effectively, after the pollutant that is rinsed is discharged by fan outlet with wash water mist and gaseous mixture, through separating treatment, can make dusty gas become clean gas, be arranged in outdoor then.Again for example, because the utility model can only rely on stream air sucking mouth, back intake-gas material, the any material that then flows the air sucking mouth suction is all without impeller, not stopped by impeller, be discharged from body but enter fan outlet along impeller outer sidewind passage without any obstacle, so the utility model can assemble vacuum cleaner and scavenging machine again and use, especially make scavenging machine and use, it is clean to give whole suctions to foreign material such as the branch leaf on the place, road surface, paper, cloth sheet, can, plastic bag, plastic bottle, soil block, crushed stone.Because the simple back stream air sucking mouth suction gaseous matter that relies on can definitely be avoided the impeller that weares and teares, and uses in order to conveying material so the utility model is especially suitable.

The utility model also can be provided with the fluid director that keeps out the wind, its fluid director that keeps out the wind is located at the body axial sides over against the impeller place, this fluid director that keeps out the wind includes barge board and guide plate, its barge board and guide plate directly connect together, barge board is pressed close to the impeller axial sides, and guide plate points to impeller outer sidewind passage from the barge board peripheral edge in body.The effect of fluid director of keeping out the wind is the impeller outlet air-flow directly to be led be unlikely to outflow in impeller outer sidewind passage.The barge board of fluid director of keeping out the wind can be multiple shapes such as circle, annular, sphere shape, and it is planar that its guide plate can be approximate circular cone tube, also can be multiple shapes such as the approximate circle column casing is planar.Fluid director inboard whole of keeping out the wind crosses the wind face does not have corner angle for well with slyness, and the vertical cross section of breaking of the whole fluid director that keeps out the wind can be various ways such as broken line, camber line, curve.When a certain axial sides of body had not only been established when keeping out the wind fluid director but also establishing special-purpose body intake grill or special impeller air sucking mouth, the barge board of its fluid director that keeps out the wind can be designed as annular, and which kind of form this is designed to and should decides on the return channel structural type of keeping out the wind on body moulding and the back stream edge, air sucking mouth as for its guide plate.In a word, whole keep out the wind fluid director such as same drum shape body (the loudspeaker bucket that end osculum is big or etc. drum shape bodys such as oral pillar shape bucket such as the end) are overlapping impeller one end or one section, like this, air-flow by impeller blade outlet discharge, can only in bucket, rotational flow flow out this sleeve, rotation flows into impeller outer sidewind passage then, add and have the stopping up and reverse guide functions of the return channel that keeps out the wind at back stream edge, air sucking mouth, the air-flow that rotation flows into the impeller outer side definitely can not outflow, like this, the air-flow that impeller is discharged is rotational flow in impeller outer sidewind passage all, will produce negative pressure by the back stream external boundary of sucking machine, air sucking mouth gaseous matter.Corresponding to the shape of stream air sucking mouth, back, the fluid director that keeps out the wind can be the planar body of pillar buoy or the planar body of conically shaped of a whole circle, also can not be the planar body of pillar buoy or the planar body of conically shaped of a whole circle.

In a word, if the utility model not only had been provided with and has kept out the wind return channel but also be provided with the fluid director that keeps out the wind, can be easy to guarantee that impeller outer sideway swivel air-flow can not be excessive, and be easy to make blower fan to obtain suction effect preferably, this mode of structure can also reduce blower sizes simultaneously.

The utility model compared with the prior art, have following good effect: one, suction energy is big, gas flow is big, the efficient height can greatly be saved the energy; Two, can greatly alleviate impeller and whole machine body internal contamination degree, prolong blower fan working life; Three, function is many, has the general commonly used incomparable multiple function of blower fan, as self cleaning dusty gas, suction pavement garbage etc.

Description of drawings:

Fig. 1-a kind of structural representation of the present utility model;

The sectional view of Fig. 2-Fig. 1;

A kind of structural representation of Fig. 3-return channel that keeps out the wind of the present utility model;

Fig. 4-another kind of structural representation of the present utility model;

The sectional view of Fig. 5-Fig. 4;

Fig. 6-another structural representation of the present utility model;

The sectional view of Fig. 7-Fig. 6;

Fig. 8-the 4th kind of structural representation of the present utility model;

A kind of structural representation of Fig. 9-fluid director that keeps out the wind of the present utility model.

The explanation of accompanying drawing drawing:

1 casing, 2 impellers, 3 exhaust outlets, stream air sucking mouth, 4 back, 5 peripheral edges, 6 impeller outer sidewind passages, 7 return channels that keep out the wind, 8 faces that keep out the wind, 9 return air faces, 10 special-purpose body intake grills, 11 impeller suction ports, 12 special impeller air sucking mouths, 13 fluid directors that keep out the wind, 14 barge boards, 15 guide plates, 16 motors, 17 filling tubes.

Provide embodiment below in conjunction with accompanying drawing, present embodiment be further explained explanation:

Embodiment 1, with reference to figure 1, Fig. 2, Fig. 3, a kind of multi-functional rear flow fan, it has casing 1, receded disk impeller 2, exhaust outlet 3, the body radial side is the planar and planar combined type of pillar buoy of conically shaped, body is not adorned an axial sides of impeller motor and is not established enclosure wall, impeller suction port 11 is with motor 16 homonymies, be provided with stream air sucking mouth 4, circular back on this side of enclosure wall not establishing, stream air sucking mouth 4, back directly is communicated with impeller outer sidewind passage 6, on the peripheral edge 5 of stream air sucking mouth 4, back, be provided with the return channel 7 that keeps out the wind, the face that keeps out the wind 8 of return channel 7 of keeping out the wind connects with stream air sucking mouth, back 4 peripheral edges 5, and its return air face 9 ecto-entads directly are communicated with impeller outer sidewind passage 6.Whole impeller outer sidewind passage 6 is along the impeller sense of rotation, and the inlet from snail tongue position to fan outlet 3 is expanssion type gradually, and the radial and axial expanssion type gradually that all is.

During work, impeller 2 high speed rotating, impeller suction port 11 is its axial outside gas of inspiration in the casing, become high velocity air through Impeller Machining, arrange then in the impeller outer side flow, produce negative pressure, impeller self directly drives its radial outside gas rotational flow again and produces negative pressure simultaneously, because stopping up and reverse guide functions of the return channel 7 that keeps out the wind arranged, can make the high speed rotating air-flows in the impeller outer sidewind passage 6 can not be excessive, again can be in air-flow path smooth flow, so under this dual suction function, can constantly will flow in the body ambient atmos material inspiration impeller outer sidewind passage 6 in stream air sucking mouth 4, back, discharge body through fan outlet 3 then.

During work, owing to being the dual suction function suction ambient atmos that relies on impeller centrifugal force and impeller periphery rotating force processing gas to produce, so its suction is strong, flow is big, and the gas major part in the back stream air sucking mouth inspiration casing is not advanced impeller, can not cause impeller seriously stained.Suitable ventilation of present embodiment and boiler air blast are used.

Present embodiment if impeller is turned, allows impeller suction port 11 place among the stream air sucking mouth 4, back, like this, to there be impeller suction port 11 and stream air sucking mouth 4, back to concentrate suction ambient atmos material together during work,, can aspirate the gaseous matter of farther distance so its suction is just stronger.

Embodiment 2, with reference to figure 4, Fig. 5, the structure of present embodiment and embodiment's 1 is basic identical, different is present embodiment is provided with special-purpose body intake grill 10 over against impeller suction port 11 places being equipped with on axial sides motor, that be provided with shell wall, and special-purpose body intake grill 10 is directly introduced ambient atmos to impeller suction port 11.

During work, introduce ambient air by special-purpose body intake grill 10 and become high velocity air through Impeller Machining, again after the impeller blade outlet is discharged, because stopping up and reverse guide functions of the return channel 7 that keeps out the wind arranged, the high velocity air of discharging through the impeller blade outlet not only can not overflow impeller outer sidewind passage 6, and can form stronger suction function because its speed is high, through stream air sucking mouth, back 4 inspiration ambient atmos, and then with this indrawn ambient atmos band in fan outlet 3 discharge bodies.In the work, by means of special-purpose body intake grill 10, impeller blade is the inspiration ambient atmos fully, this indrawn ambient atmos fully can be processed into high velocity air again, utilize the suction function of this high velocity air to aspirate ambient atmos once more by stream air sucking mouth 4, back, and the impeller blade exit velocity is more much bigger than its inlet flow velocity, after the pumping action of stream air sucking mouth more much bigger than the pumping action of special-purpose body intake grill, so the suction and the suction amount of back stream air sucking mouth 4 are more much bigger than the suction suction amount of special-purpose body intake grill 10.

Compare with axial-flow blower with existing centrifugal blower, the blower fan of equal-wattage, the suction suction amount of present embodiment and efficient all can be much bigger, thereby can save the energy greatly.Present embodiment is suitable for air blast and ventilation is used.

Embodiment 3, with reference to figure 6, Fig. 7, present embodiment is identical with embodiment's 1 basic structure, the body radial side of different is present embodiment is that cylindrical drum is planar, impeller outer sidewind passage 6 is axial expanssion types gradually, be provided with special impeller air sucking mouth 12 in impeller suction port 11 outer ends, special impeller air sucking mouth 12 is a cylinder short tube, its outlet end connects together with impeller suction port 11, its entry end is given prominence to and is exposed in the chassis sidewall outside, be provided with filling tube 17 in 12 outsides, special impeller air sucking mouth, 12 direct slaves external inspiration gaseous matter in special impeller air sucking mouth injects impeller suction port 11.

The environment-friendly range hood that present embodiment can be made the washing, purifying dusty gas uses, and sprays into wash water by filling tube 17 in special impeller air sucking mouth 12, allows the back flow air sucking mouth 4 inspiration dusty gass.During work, the wash water of special impeller air sucking mouth 12 inspirations is after Impeller Machining becomes high speed wash water spray to be discharged from impeller, can produce negative pressure by the extraneous oil smoke pollution gas of stream air sucking mouth, back 4 suctions, again can washing, purifying oil smoke pollution gas, this be because, after dusty gas is sucked into impeller outer sidewind passage, to merge together with the wash water mist and flow, and in merging flow process, because the wash water mist is than great, the speed height, penetrating power is strong, so its Washing dusty gas constantly, the grease contamination material that is rinsed in the dusty gas flows into fan outlet 3 with wash water mist and gaseous mixture, enter gas-liquid separator through fan outlet 3 again and separate, the clean air that is separated is arranged in outdoor, and grease contamination that is separated and water are stayed connecing in the oil tank in gas-liquid separator.

Present embodiment not only has the advantage that suction is strong, the suction amount is big, efficient is high, save the energy, also have guarantee impeller can contaminated gas stained advantage, if allow inspiration clean air in special impeller air sucking mouth make medium, the multi-functional rear flow fan of this kind structure is well suited for doing general kitchen ventilator, dust cleaning machine, vacuum cleaner, induced draught fan, feeder and mechanical sweeper on road again and uses; No matter make which machine and use, can guarantee that impeller is not by stained.

Embodiment 4, with reference to figure 8, Fig. 9, this example is similar substantially to example 1, different is that this example also is provided with the special impeller air sucking mouth 12 and the fluid director 13 that keeps out the wind, special impeller air sucking mouth 12 is located at impeller suction port 11 outer ends and directly connects together with impeller suction port 11, its entry end is given prominence to and is exposed in the casing 1 sidewall outside, directly the extraneous spatial communication of root body.The body same side is located at impeller motor 16 in special impeller air sucking mouth 12.Stream air sucking mouth 4 was interior over against impeller axial sides place after the fluid director 13 that keeps out the wind was located at blower fan, keep out the wind fluid director 13 and special impeller air sucking mouth 12 places body two axial sides respectively, the fluid director 13 that keeps out the wind is made up of circular barge board 14 and the planar guide plate 15 of conically shaped, barge board 14 and guide plate 15 closely connect together, keep out the wind slick and sly the no corner angle of the wind face of crossing of fluid director 13 inboards, shallow barrel that whole keep out the wind fluid director 13 as osculum of the same end are big is being covered the end that impeller does not have suction port.

During the work of this example, stopping up and reverse guide functions of the existing return channel 7 that keeps out the wind, stopping up and guide functions of the fluid director 13 that keeps out the wind arranged again, can guarantee that the air-flow in the impeller outer sidewind passage definitely can not outflow in stream air sucking mouth 4, back, makes stream air sucking mouth 4, back can not be subjected to any interference and aspirate the ambient atmos material fully.Fairly obvious, this structural formula can guarantee that blower fan has higher efficient, simultaneously because the return channel 7 that keeps out the wind is stopped up effect with fluid director 13 two-folds of keeping out the wind, the return channel 7 and fluid director 13 physical dimensions of keeping out the wind can reduce so keep out the wind, thereby the whole machine body molded dimension also can suitably be reduced.

Claims

1, multi-functional rear flow fan, include casing (1), impeller (2), exhaust outlet (3), it is characterized in that being provided with stream air sucking mouth (4), back in the body axial sides, the peripheral edge (5) of stream air sucking mouth, back (4) connects with casing (1), stream air sucking mouth (4), back ecto-entad directly is communicated with impeller outside air-flow path (6) in the casing, locate to be provided with the return channel (7) that keeps out the wind in stream air sucking mouth, back (4), the return channel (7) that keeps out the wind comprises face of keeping out the wind (8) and return air face (9), keep out the wind face (8) and return air face (9) directly connects together, the face that keeps out the wind (8) of return channel (7) of keeping out the wind connects with the peripheral edge (5) of back stream air sucking mouth (4), and its return air face (9) ecto-entad points to impeller outer sidewind passage (6).

2, multi-functional rear flow fan according to claim 1 is characterized in that also being provided with special-purpose body intake grill (10), and special-purpose body intake grill (10) is located on the body axial side wall of impeller, directly is communicated with impeller suction port (11).

3, multi-functional rear flow fan according to claim 1 is characterized in that locating to be provided with special impeller air sucking mouth (12) at impeller suction port (11), and give prominence to outside the body axial side wall special impeller air sucking mouth (12), directly and the extraneous spatial communication of body.

4, according to claim 1 or 2 or 3 described multi-functional rear flow fans, it is characterized in that, be provided with the fluid director that keeps out the wind (13) over against the impeller place in the body axial sides, the fluid director (13) that keeps out the wind comprises barge board (14) and guide plate (15), its barge board (14) and guide plate (15) directly connect together, the barge board (14) of fluid director (13) of keeping out the wind is pressed close to impeller (2) axial sides, and its guide plate (15) points to impeller outer sidewind passage (6) from barge board (14) peripheral edge in body.