CN102192168B - Ventilating fan - Google Patents
Ventilating fan Download PDFInfo
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- CN102192168B CN102192168B CN 201010130195 CN201010130195A CN102192168B CN 102192168 B CN102192168 B CN 102192168B CN 201010130195 CN201010130195 CN 201010130195 CN 201010130195 A CN201010130195 A CN 201010130195A CN 102192168 B CN102192168 B CN 102192168B
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Abstract
The invention relates to a ventilating fan which comprises a multi-blade air feeder and a joint, wherein the multi-blade air feeder is arranged in a box-shaped body, and the joint is connected with an air outlet of the multi-blade air feeder; the multi-blade air feeder is formed by two pieces of opposite coil-shaped rolling plates and a spiral casing plate which is clamped by and connected with the rolling plates; a first rolling plate is provided with a total air inlet of the ventilating fan; and a central line of the air outlet of the joint is close to a second rolling plate to be bias arranged. The ventilating fan has the advantages that as turbulent flows are not generated at the joint, the air quantity of the ventilating fan can be very easily ensured and the noise is reduced. Not only small-sized air feeding devices can be supplied, but also the stability of the product performance can be increased.
Description
Technical field
The invention relates to a kind of structure of blast device, refer in particular to the ventilation fan of establishing multiple-wing fan in a kind of.
Background technique
As shown in Figure 1, for a kind of known ventilation fan 100, be provided with multiple-wing fan 120 in the body 110 of case shape, intake grill 111 inhaled airs below body 110 are discharged outdoor by the exhaust outlet 112 of body 110 sides.And, outdoor in order from above-mentioned exhaust outlet 112 air to be discharged, be provided with metal joint 150 at exhaust outlet 112 places of above-mentioned body 110 sides, this metal joint 150 is connected with the outdoor pipeline (not shown) that is connected.
Because the exhaust outlet 112 that above-mentioned multiple-wing fan 120 is provided with is for square, but be circle with an end of the outdoor pipeline that is connected, simultaneously, because the area of the exhaust outlet 112 of multiple-wing fan 120 is bigger than the sectional area of pipeline 140, be necessary to dwindle the wind path area in metal joint 150 parts, be about to square exhaust outlet and evenly dwindle and convert circle to.That is to say, the square relative limit of exhaust outlet 112 from outside circumferentially the center symmetry dwindle conversion.
There is following problem in the blast device of above-mentioned known technology: because the square configuration of exhaust outlet 112 and pipeline is round-shaped different, so the air that multiple-wing fan 120 blows out is difficult to change smoothly.That is to say that though exhaust outlet evenly dwindles, the air that multiple-wing fan 120 blows out is still inhomogeneous, be easy to produce turbulent flow, be subjected to the influence of this turbulent flow, ventilation fan can not be guaranteed the air quantity of blowing.Therefore, need maximize to guarantee air quantity by making multiple-wing fan.But the noise that large-scale multiple-wing fan can produce can be bigger.
Summary of the invention
Main purpose of the present invention is to provide a kind of ventilation fan, under the situation of the multiple-wing fan that adopts identical performance, bigger air output can be arranged.
Secondary objective of the present invention is to provide a kind of ventilation fan, and is under the situation of the multiple-wing fan that adopts identical performance, quieter during running.
For achieving the above object, the invention provides a kind of ventilation fan,
Be arranged at the multiple-wing fan of case shape body, and the joint that is connected with this multiple-wing fan exhaust outlet, above-mentioned multiple-wing fan by the roll bending of two relative roll-shapes with folded the snail coverboard that is connected by this roll bending and constituted, first roll bending is provided with the total intake grill of ventilation fan, and the center line of the exhaust outlet of joint is put by the second roll bending lateral deviation; In the nearest position, the flabellum outside from the snail coverboard tongue is set; In the extending portion of this tongue sense of rotation along flabellum, form the expansion section of wind path, prolong this expansion section until the opposite side of above-mentioned tongue, be provided with first line part of snail coverboard, this first line part arranges near the air-out oral-lateral of ventilation fan, tilts to the direction that suppresses wind path; The opposite side of the above-mentioned tongue exhaust outlet straight line shape to ventilation fan is prolonged, be provided with second line part of snail coverboard, this second line part tilts to make wind path crooked to the inside with respect to first line part to the direction that suppresses wind path; With respect to from the center that connects flabellum to the straight line of tongue, the tilt angle theta 1 of first line part is between the 5-15 degree; The angle theta 3 of first line part and second line part is between the 5-15 degree.
Above-mentioned joint has square intake grill and circular exhaust outlet, and the outer side of above-mentioned intake grill arranges with the end face of above-mentioned second roll bending is consistent, and the joint exhaust outlet and is connected with above-mentioned outer side in the projection plane of above-mentioned intake grill.
In the wind path between described expansion section and joint exhaust outlet, form the zigzag part that makes the airflow direction bending at snail coverboard and joint.
Described first line part and second line part constitute wind path first curved part of bending to the inside; The rounded portions of second line part and joint constitutes wind path second curved part of bending laterally, and the angle theta 4 of the rounded portions of second line part and joint is between the 5-15 degree; Above-mentioned continuous first curved part and second curved part constitute described zigzag part, and second curved part is littler than the tortuosity of first curved part.
Above-mentioned tongue prolongs to the exhaust outlet straight line of ventilation fan, is provided with the 3rd line part of snail coverboard; Described first line part and second line part constitute wind path first curved part of bending to the inside; The rounded portions of second line part and joint constitutes wind path second curved part of bending laterally, and the angle theta 4 of the rounded portions of second line part and joint is between the 5-15 degree; The rounded portions of the 3rd line part and joint constitutes wind path the 3rd curved part of bending to the inside, and the angle theta 5 of the rounded portions of the 3rd line part and joint is between the 5-15 degree; Above-mentioned continuous first curved part, second curved part, and the 3rd curved part constitutes described zigzag part, wherein, second curved part is littler than the tortuosity of first curved part.
Described θ 3 is twices of θ 4, and described θ 4 equates with θ 5.
Described θ 1 is 10 degree, and described θ 3 is 14 degree, and described θ 4 is 6.5 degree, and described θ 5 is 6 degree.
The invention has the advantages that in the joint can not produce turbulent flow, so, can be easy to guarantee the air quantity of ventilation fan and reduce noise.Small-sized blast device efficiently can be provided, and the stability that can enhance product performance.
Description of drawings
Fig. 1 is the known technology schematic representation;
Fig. 2 is the structure of multiple-wing fan and the resin joint processed of embodiments of the invention;
Fig. 3 is the overall schematic of embodiments of the invention;
Fig. 4 is that view is looked squarely in multiple-wing fan among the present invention and the front of joint.
Embodiment
As shown in Figures 2 and 3, be the schematic representation of the embodiment of the invention.Blast device 100, comprise: be arranged at the multiple-wing fan 120 in the case shape body 110, and the joint 130 that is connected with the square exhaust outlet 112 of this multiple-wing fan 120, above-mentioned multiple-wing fan 120 is by first roll bending 200, second roll bending 300 of two relative roll-shapes and folded the snail coverboard 400 that is connected by these two roll bendings and constituted, first roll bending 200 is provided with the total intake grill 210 of ventilation fan, joint 130 has square intake grill 131 and circular exhaust outlet 132, and the center line 133 of circular exhaust outlet 132 is put by second roll bending, 300 lateral deviations.
Need to prove, refer to metal parts at the joint 150 of the prior art shown in Fig. 1.And the joint 130 of indication of the present invention refers to resinous joint 130.
Above-mentioned biasing refers to, the outer side 1311 of the intake grill 131 of joint 130 and the end face of above-mentioned second roll bending 300 310 consistent settings; The exhaust outlet 132 of joint 130 and is connected with above-mentioned outer side 1311 in the projection to multiple-wing fan 120 directions falls into above-mentioned intake grill 131.Therefore, the center line 133 of circular exhaust outlet 132 and the distance of second roll bending, 300 sides less than with the distance of first roll bending, 200 sides, be partial to the second roll bending setting, rather than with first roll bending 200 and second roll bending, 300 both equidistant middles.
The outer side 1311 of the intake grill 131 by making joint 130 and end face 310 consistent settings of above-mentioned second roll bending 300, be the exhaust outlet 132 that joint 130 exhaust outlets 132 is connected with the outer side 1311 of above-mentioned joint 130 intake grills 131 on the projection plane and establishes joint 130 partially, though so the wind that multiple-wing fan 120 blows out is inhomogeneous, but owing to can make the outer side 1311 of intake grill 131 become plane substantially with the end face 310 of above-mentioned second roll bending 300, therefore wind diminishes to the opposing that is subjected to the exhaust outlet 132 from joint 130 intake grills 131, and said flow is concentrated more with smooth and easy.By above structure, the wind that the flabellum of multiple-wing fan 120 is blown out is compared with first roll bending, 200 sides that are provided with the total intake grill 210 of ventilation fan, flow swimmingly along second roll bending, 300 sides, so the wind bundle of wind beam ratio first roll bending 200 of second roll bending 300 is many.
That is to say that the wind that blows out from the exhaust outlet 112 of multiple-wing fan 120 is to concentrate on second roll bending 300 to blow side out after the intake grill 210 slow bendings of ventilation fan.Because first roll bending 200 and intake grill 210 are on one side, so the wind that passes multiple-wing fan 120 flabellums is difficult to sharply moving to first roll bending, 200 lateral bendings meander.So, when the exhaust outlet 132 of joint 130 arranges near second roll bending, 300 sides, reduce influence to air-flow by dwindling wind path area from first roll bending, 200 sides to second roll bending, 300 sides, can change to the circular pipe (not shown) smoothly from the square exhaust outlet 112 of multiple-wing fan.
That is to say that not dwindling by second roll bending, 300 sides of joint 130 by significantly dwindling the area that can dwindle wind path by the joint 130 of first roll bending, 200 sides in short distance, reduces the influence that causes because dwindling.Can suppress the generation of turbulent flow thus, so can be easy to guarantee air quantity.And, can also reduce noise.
And, as above-mentioned, dwindle wind path in joint 130 parts and refer to when joint 130 moulding are made, realize to airflow direction slip moulding by making mould, can simply form along the sliding shape of dwindling.The air-supply pusher side just multiple-wing fan 120 sides also can consider to dwindle like this, still, be to dwindle from the part of flabellum close to very, can't accomplish in the short distance to dwindle at this moment.Because the air direct collision that blows out from flabellum is dwindled part and can be produced sinuous flow, so, must in very long distance, dwindle.That is to say that it is optimal dwindling in joint 130 parts of present embodiment.
In addition, pass through said structure, joint 130 can be set to more lack, when adopting the metal joint of prior art to keep its length, the shape of the exhaust outlet 112 of multiple-wing fan 120 is in the pipe shape transfer process, when the opening end (outdoor) at the exhaust outlet 112 of multiple-wing fan 120 arranged the venetian blind (not shown), compared with prior art, venetian blind can more close blast device body 110 side settings.Therefore, during with the same pipe laying of prior art, even use screw fixing tube and metal joint 150, screw can not run into venetian blind yet.That is to say that the metal of Fig. 1 joint 150 processed can be kept its original length.
For further guaranteeing air quantity and reducing noise, look squarely state as the multiple-wing fan 120 of Fig. 4 demonstration and the front of joint 130, have zigzag part 780 in the visible in the drawings wind path 700 of the present invention.
In the nearest position, the flabellum outside from snail coverboard 400 tongue 440 is set.In the extending portion of this tongue 440 sense of rotation along above-mentioned flabellum, has the expansion section 740 of wind path 700.Prolong this expansion section 740 is provided with snail coverboard 400 until the opposite side 450 of above-mentioned tongue 440 first line part 410; The opposite side 450 of above-mentioned tongue 440 exhaust outlet 132 straight line shapies to ventilation fan are prolonged, be provided with second line part 420 of snail coverboard 400; Above-mentioned tongue 440 prolongs to exhaust outlet 132 straight lines of ventilation fan, is provided with the 3rd line part 430 of snail coverboard 400.
And, with respect to from the center that connects flabellum to the straight line of tongue 440, first line part 410 about 10 degree (θ 1 as shown in Figure 4) that tilt are near the exhaust outlet 132 side settings of ventilation fan.That is to say that first line part 410 arranges for the expansion that suppresses wind path 700.For realizing this purpose, the expansion section 740 in the present embodiment is to begin to form in 284 scopes of spending of flabellum sense of rotation in the position from tongue 440.(θ 2 as shown in Figure 4)
Constitute wind paths crooked first curved part 710 to the inside at first line part 410 of the peripheral part of hodmadod and second line part 420; The rounded portions 138 of second line part 420 and joint 130 constitutes wind path second curved part 720 of bending laterally; The rounded portions 138 of the 3rd line part 430 and joint 130 constitutes wind path the 3rd curved part 730 of bending to the inside.Constitute zigzag part 780 by first curved part 710, second curved part 720 and the 3rd curved part 730.That is to say that zigzag part 780 refers in expansion section 740 and the wind path between joint 130 exhaust outlets 132 that multiple-wing fan 120 and joint 130 forms, make airflow direction crooked and form at snail coverboard 400 and joint 130 places.
At the crooked direction that refers to the expansion of hodmadod wall laterally that the present invention states, direction A as shown in FIG.; The said crooked direction that the hodmadod wall dwindles, direction B as shown in FIG. of referring to the inside.But, since wind path 700 sectional areas actual be that relation by the tortuosity of opposite side 450 and another side 460 is determined, so when not being and when expansion and dwindle the sectional area of wind path 700.
By the effect of first line part 410, in the field of tongue 440 with the attachment portion of first line part 410 that links its opposite side 450 and second line part 420, the expansion of wind path 700 is suppressed.And, so not only can make the static pressure in the multiple-wing fan 120 more stable, and can prevent the entanglement of wind bundle.
In addition, by the effect of the 1st curved part 710, the collision angle of the air of the 3rd line part 430 can be reduced to blow to from flabellum, the turbulent flow that takes place in this part can be reduced.In addition, second line part 420 of side 450 by the centrifugal force of flabellum, leans on the air of first line part, 410 side flow in the process of the exhaust outlet 112 that flows to multiple-wing fan 120 over there, and its direction is corrected.In addition, at second curved part 720, when air flowed to joint 130 from the exhaust outlet 112 of multiple-wing fan 120, the air-flow that is corrected at first curved part 710 was again by little correction.
That is to say that state is looked squarely in front shown in the figure, by the 3rd line part 430 that is arranged at the left side and first line part 410, second line part 420 that is arranged at the right side, can revise the inhomogeneous air-flow of the substantially horizontal that blows out from flabellum.
By above structure, the wind that flabellum blows out is by the flows inside of action of centrifugal force along snail coverboard 400.At this moment, by the effect of zigzag part 780, the airflow direction of air is by revisal in the multiple-wing fan 120, and the density of wind bundle is more even, and its air-flow becomes smooth and easy.And, because making wind path, zigzag part 780 is bent to form, so the noise that flabellum takes place is on one side with the inwall of first line part 410, the 3rd line part 430, joint 130 or bump with second line part 420, joint 130 inwalls on one side, on one side to exhaust outlet 132 diffusions of joint 130.That is to say, bump repeatedly by making it, can reduce noise.
So for cooperating the shape of pipeline, square wind path can be converted to circular wind path smoothly by joint 130.Therefore, look squarely state in the front shown in Fig. 4, even dwindle joint 130 dwindling portion's 139 bilateral symmetry, also can guarantee airflow smooth.
Again as shown in Figure 4, the bend angle of first curved part 710 is that the bend angle of θ 3, the second curved parts 720 is θ 4, and θ 4＜θ 3 in the present embodiment namely compares with first curved part 710, and second curved part 720 is slightly to crooked in the other direction.In the present embodiment, for example θ 3 is 14 degree, and θ 4 is 6.5 degree, and θ 5 is 6 degree.
Because the tortuosity of second curved part, 720 to the first curved parts 710 is little, collide and shaking of producing can not be spread through the air of zigzag part 780 and this zigzag part 780, but it gathered, by joint 130 make its with pipeline in be connected.That is to say, carry out little correction again by 720 pairs of air-flows that are corrected at first curved part 710 of second curved part, guarantee the stable and level of noise of air-flow with this.
In addition, the value of above-mentioned θ 2～θ 5 is not the value that limits as above embodiment, and the bend angle of the angle of the angle of the angle of inclination of first line part 410, first line part 410 and second line part 420, second line part 420 and joint 138, the 3rd line part 460 and joint 138 can be respectively between 5 degree～15 degree.And the size of indication is comparatively speaking.That is to say that θ 3 compares with θ 4, θ 3 angles can be about 2 times of θ 4, and the angle of θ 4 and θ 5 can equate.
In addition, in the present embodiment, first roll bending 200 and second roll bending 300 are folded the blast device that snail coverboard 400 constitutes to be illustrated, certainly be not must be by each different portion's product combination yet, for example, first roll bending 200 is formed by a sheet metal, second roll bending 300 and snail coverboard 400 by resin one-body molded combine also passable, perhaps first roll bending 200 and hodmadod 400 are one-body molded by resin, and second roll bending 300 becomes combination also can by metal plate shape.
Claims (7)
1. ventilation fan, comprise: the multiple-wing fan that is arranged at case shape body, and the joint that is connected with this multiple-wing fan exhaust outlet, it is characterized in that, above-mentioned multiple-wing fan by the roll bending of two relative roll-shapes with folded the snail coverboard that is connected by this roll bending and constituted, first roll bending is provided with the total intake grill of ventilation fan, and the center line of the exhaust outlet of joint is put by the second roll bending lateral deviation;
In the nearest position, the flabellum outside from the snail coverboard tongue is set;
In the extending portion of this tongue sense of rotation along flabellum, form the expansion section of wind path, prolong this expansion section until the opposite side of above-mentioned tongue, be provided with first line part of snail coverboard, this first line part arranges near the air-out oral-lateral of ventilation fan, tilts to the direction that suppresses wind path;
The opposite side of the above-mentioned tongue exhaust outlet straight line shape to ventilation fan is prolonged, be provided with second line part of snail coverboard, this second line part tilts to make wind path crooked to the inside with respect to first line part to the direction that suppresses wind path;
With respect to from the center that connects flabellum to the straight line of tongue, the tilt angle theta 1 of first line part is between the 5-15 degree; The angle theta 3 of first line part and second line part is between the 5-15 degree.
2. ventilation fan according to claim 1, it is characterized in that: above-mentioned joint has square intake grill and circular exhaust outlet, the outer side of above-mentioned intake grill arranges with the end face of above-mentioned second roll bending is consistent, and the joint exhaust outlet and is connected with above-mentioned outer side in the projection plane of above-mentioned intake grill.
3. ventilation fan according to claim 1 is characterized in that: in the wind path between described expansion section and joint exhaust outlet, form the zigzag part that makes the airflow direction bending at snail coverboard and joint.
4. ventilation fan according to claim 3 is characterized in that:
Described first line part and second line part constitute wind path first curved part of bending to the inside; The rounded portions of second line part and joint constitutes wind path second curved part of bending laterally, and the angle theta 4 of the rounded portions of second line part and joint is between the 5-15 degree;
Above-mentioned continuous first curved part and second curved part constitute described zigzag part, and second curved part is littler than the tortuosity of first curved part.
5. ventilation fan according to claim 3 is characterized in that:
Above-mentioned tongue prolongs to the exhaust outlet straight line of ventilation fan, is provided with the 3rd line part of snail coverboard;
Described first line part and second line part constitute wind path first curved part of bending to the inside; The rounded portions of second line part and joint constitutes wind path second curved part of bending laterally, and the angle theta 4 of the rounded portions of second line part and joint is between the 5-15 degree; The rounded portions of the 3rd line part and joint constitutes wind path the 3rd curved part of bending to the inside, and the angle theta 5 of the rounded portions of the 3rd line part and joint is between the 5-15 degree;
Above-mentioned continuous first curved part, second curved part, and the 3rd curved part constitutes described zigzag part, wherein, second curved part is littler than the tortuosity of first curved part.
6. ventilation fan according to claim 5, it is characterized in that: described θ 3 is twices of θ 4, described θ 4 equates with θ 5.
7. ventilation fan according to claim 5 is characterized in that: described θ 1 is 10 degree, and described θ 3 is 14 degree, and described θ 4 is 6.5 degree, and described θ 5 is 6 degree.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010130195 CN102192168B (en) | 2010-03-17 | 2010-03-17 | Ventilating fan |
| PCT/CN2011/000209 WO2011113297A1 (en) | 2010-03-17 | 2011-02-10 | Ventilator |
| US13/634,032 US10047756B2 (en) | 2010-03-17 | 2011-02-10 | Ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010130195 CN102192168B (en) | 2010-03-17 | 2010-03-17 | Ventilating fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102192168A CN102192168A (en) | 2011-09-21 |
| CN102192168B true CN102192168B (en) | 2013-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010130195 Active CN102192168B (en) | 2010-03-17 | 2010-03-17 | Ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102192168B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013204144A1 (en) * | 2013-03-11 | 2014-09-11 | BSH Bosch und Siemens Hausgeräte GmbH | Housing for a radial fan of an extractor hood |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291157A (en) * | 2004-04-02 | 2005-10-20 | Calsonic Kansei Corp | Centrifugal type multi-blade blower |
| CN1978917A (en) * | 2005-12-03 | 2007-06-13 | 鸿富锦精密工业（深圳）有限公司 | Blowing fan |
| CN101627211A (en) * | 2006-12-14 | 2010-01-13 | 松下电器产业株式会社 | Centrifugal impeller and centrifugal blower using it |
| CN102365465A (en) * | 2009-04-07 | 2012-02-29 | 松下电器产业株式会社 | Air blowing device |
-
2010
- 2010-03-17 CN CN 201010130195 patent/CN102192168B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291157A (en) * | 2004-04-02 | 2005-10-20 | Calsonic Kansei Corp | Centrifugal type multi-blade blower |
| CN1978917A (en) * | 2005-12-03 | 2007-06-13 | 鸿富锦精密工业（深圳）有限公司 | Blowing fan |
| CN101627211A (en) * | 2006-12-14 | 2010-01-13 | 松下电器产业株式会社 | Centrifugal impeller and centrifugal blower using it |
| CN102365465A (en) * | 2009-04-07 | 2012-02-29 | 松下电器产业株式会社 | Air blowing device |
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| Publication number | Publication date |
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| CN102192168A (en) | 2011-09-21 |
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