CN104005996A - Volute, centrifugal fan volute and range hood - Google Patents
Volute, centrifugal fan volute and range hood Download PDFInfo
- Publication number
- CN104005996A CN104005996A CN201410201183.3A CN201410201183A CN104005996A CN 104005996 A CN104005996 A CN 104005996A CN 201410201183 A CN201410201183 A CN 201410201183A CN 104005996 A CN104005996 A CN 104005996A
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- snail tongue
- arc section
- spiral case
- side panel
- hollow cavity
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Abstract
The invention provides a volute, a centrifugal fan volute and a range hood. The volute comprises a front plate, a side wall plate, a bottom plate and a volute tongue, an air inlet is formed in the front plate, the front plate and the bottom plate are respectively connected with the side wall plate, the edges of the side wall plate are logarithmic spiral lines, a hollow cavity is formed by the side wall plate, the edge line of the volute tongue comprises an arc segment and a straight line segment, the arc segment and the straight line segment are in smooth transition, the arc segment is connected with the side wall plate, and extending lines of the logarithmic spiral lines of the side wall plate are tangent to the arc segment. The volute tongue is different from the traditional design, the arc segment of the volute tongue is tangent to the extending lines of the logarithmic spiral lines of the side wall plate, and therefore air flows more smoothly in the flowing process, flowing losses are reduced, the air volume of the volute is high at the same rotating speed, and the high air volume requirement is met.
Description
Technical field
The present invention relates to centrifugal blower field, relate in particular to a kind of spiral case.
Background technique
The effect of range hood centrifugal blower volute is by, water conservancy diversion concentrated from impeller gas out, and the part kinetic energy of gas is transformed into rest energy, and gas can be passed.When vane rotary, the collision of the air-flow being brought by impeller and snail tonguing line period, air-flow periodically, by snail tongue room, can produce wind loss, produces a kind of periodically noise simultaneously.Mostly traditional centrifugal blower volute is straight snail tongue, and snail tongue radius is constant.Traditional centrifugal blower volute structure is such: impeller arranges in spiral case, spiral case comprises header board, side panel, base plate and snail tongue, header board is provided with intake grill, base plate is connected with electric machine support, the axle central vertical of impeller is in the plane at base plate place, the longitudinal shaft symmetry plane of snail tongue and impeller shaft line parallel.When centrifugal blower work, vane rotary, the periodicity collision between the gas being brought by impeller and snail tongue and air-flow, periodically by the gap between blade and snail tongue, can produce wind loss and a kind of periodically Rotation Noise.Traditional snail tongue equates with the gap of impeller, and the noise stack of identical frequency, produces periodic peak noise, causes the centrifugal blower Rotation Noise of this kind of structure relatively high.
The spiral case that therefore a kind of Wind Volume is provided is problem demanding prompt solution.
Summary of the invention
In order to solve the problem that spiral case air quantity is little, the object of this invention is to provide a kind of spiral case and the centrifugal blower volute that comprises this spiral case and the range hood that comprises centrifugal blower volute.
Technological scheme of the present invention is as follows:
A kind of spiral case, comprise header board, side panel, base plate and snail tongue, on header board, be provided with intake grill, header board is connected with side panel respectively with base plate, and the edge of described side panel is log spiral, and described side panel forms a hollow cavity, the edge line of described snail tongue comprises arc section and straightway, described arc section and described straightway seamlessly transit, and described arc section is connected with described side panel, and the elongation line of the log spiral of described side panel and described arc section tangent.
Wherein, the arc section of described snail tongue is outstanding to the direction of the center line near described hollow cavity.
Wherein, the distance between the straightway of described snail tongue and the outer wall of described side panel increases gradually along the bearing of trend of described straightway.
Wherein, at an angle between the axis of described snail tongue and the center line of described hollow cavity.
Wherein, the angle between the axis of described snail tongue and the center line of described hollow cavity is 10 degree to 30 degree.
Wherein, the edge line of described snail tongue comprises the lower limb line near the top edge line of header board and close base plate, described top edge line comprises the first arc section AB and the first straightway BC, described lower limb line comprises the second arc section ab and the second straightway bc, and the radius of the radius of wherein said the first arc section AB and described the second arc section ab equates.
Wherein, the center line of the relatively described hollow cavity of the axis of described snail tongue slopes inwardly.
The present invention also provides a kind of centrifugal blower volute, comprises impeller, also comprises above-described spiral case; Described impeller is arranged in the hollow cavity of described spiral case.
Wherein, the axis of described impeller and the center line of described hollow cavity overlap.
The present invention also provides a kind of range hood, and it comprises centrifugal blower volute as above.
The invention has the beneficial effects as follows: the spiral inlet area in the present invention is not in traditional design, the elongation line of the circular arc of snail tongue and the log spiral of side panel is tangent, ensure that like this wind is in mobile process, more smooth and easy, reduce flow losses, make under same rotational speed, the air quantity of the spiral case in the present invention is higher, has reached the requirement of high air quantity.
Brief description of the drawings
Fig. 1 is an embodiment's of the spiral case in the present invention schematic perspective view;
Fig. 2 is the schematic top plan view of the spiral case shown in Fig. 1.
Embodiment
In order to make object, technological scheme and the advantage of spiral case of the present invention and centrifugal blower volute and range hood clearer, below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Referring to Fig. 1 and Fig. 2, the invention provides a kind of spiral case, comprise header board 100, side panel 200, base plate 300 and snail tongue 400, on header board 100, be provided with intake grill 110, header board 100 is connected with side panel 200 respectively with base plate 300, header board 100 is provided with baffle liner, the edge of described side panel 200 is log spiral, described side panel 200 surrounds a hollow cavity, the edge line of described snail tongue comprises arc section and straightway, described arc section is connected with described side panel, described straightway is connected with described arc section, wherein the elongation line of the log spiral of side panel and described arc section are tangent, its point of contact is near log spiral or be the intersection point of arc section and side panel.Specifically, header board 100 is riveted on side panel 200 by panel beating button bit, and base plate 300 is also riveted on side panel 200 by panel beating button bit, and side panel 200 is to generate with log spiral design.Referring to Fig. 1, snail tongue 400 comprises arc section AB and straightway BC, and arc section AB and straightway BC seamlessly transit, and arc section AB is tangent along elongation line and the arc section AB of the log spiral of described side panel 200.Spiral inlet area in the present embodiment is not in traditional design, the arc section of snail tongue is that the elongation line of snail tongue fillet and this log spiral is tangent, ensure that like this wind is in mobile process, more smooth and easy, reduce flow losses, make under same rotational speed, the air quantity of the spiral case in the present embodiment is higher, has reached the requirement of high air quantity.
Further, referring to Fig. 2, the equation of described log spiral is:
Wherein, R
2for spiral case start radius, α is blade exit flow angle, b
2for blade height, B is spiral case thickness,
for the angle in the corresponding cross section of α and initial cross section.
Preferably, as a kind of embodiment, the arc section of the snail tongue 400 in the present embodiment is outstanding to the center line near described hollow cavity.Because of gas flow impeller under the effect of baffle liner, effect by impeller passes, but gapped between baffle liner and impeller, the mobile of gas can produce some eddy current, cause the leakage loss of gas, due to relatively little near the wind speed of header board 100 ends, snail tongue fillet is inwardly outstanding, arrange so less on the impact of noise and can effectively reduce the leakage loss of gas, improving about 8% left and right of air quantity.By the closed loop control of air quantity, under the condition of equal air quantity, reduce the rotational speed of impeller like this, reduced noise.
Preferably, as a kind of embodiment, referring to Fig. 2, the distance t between the straightway of described snail tongue 400 and the outer wall of described side panel 200 increases gradually along the bearing of trend of described straightway.Distance between straightway BC and the described side panel 200 of the snail tongue 400 in the present embodiment is the gap between snail tongue 400 and side panel 200 namely, and this distance is actually the perpendicular distance between straightway BC and log spiral.The bearing of trend of straightway is from the one end near arc section to the one end away from arc section.Gap between the different parts of snail tongue 400 and side panel 200 is not what equate, but is the gradual change increasing gradually.What deserves to be explained is, gap between snail tongue 400 and side panel 200 in the present embodiment is gradual change, be that distance between the center line of the hollow cavity that forms of snail tongue and side panel is gradual change, when use, impeller is placed in hollow cavity, and therefore the gap between snail tongue and impeller is gradual change.And snail tongue of the prior art equates with the gap of impeller, cause thus the noise stack of identical frequency, produce periodic peak noise.Because the gap between snail tongue 400 and side panel 200 in the present embodiment is gradual change along the centerline direction of described hollow cavity, just can avoid producing identical frequency, and then avoid the noise of same frequency superpose and can not produce periodic peak noise; Thereby reduce the noise of spiral case.
Preferably, at an angle between the axis 430 of described snail tongue 400 and the center line 120 of described hollow cavity, and centroclinal to described arc section of the axis of described snail tongue.Referring to Fig. 1, axis 430 is the line at the first arc section AB center and the second arc section ab center.In the present embodiment, the exhaust outlet 440 place planes of snail tongue are plane CDdc, this plane is parallel with the center line 120 of described hollow cavity, that is to say that the plane of exhaust outlet and the plane of intake grill are vertical, and in the plan view of Fig. 2, the end points C of the first straightway and the end points c of the second straightway overlap.That is to say that in the present embodiment, snail tongue 400 is a smooth oblique arc surface with the joint of side panel 200.Header board 100 and base plate 300 in the present embodiment are parallel to each other.And the angle between straightway BC and CD is 30 degree to 60 degree, is preferably 45 degree.
Better, referring to Fig. 1, the angle between the axis 430 of described snail tongue 400 and the center line 120 of described hollow cavity is 10 degree to 30 degree.Snail tongue in this enforcement is incline tongue.Adopt incline tongue effectively to suppress the pressure surge of the fundamental frequency on snail tongue surface, making impeller outlet air-flow arrive snail tongue place circumferentially mixes, more even, smaller to snail tongue impact degree, reach the object of the noise that has reduced blower fan thereby the stack of having avoided higher harmonics acoustic pressure reduces fundamental frequency and its higher harmonics simultaneously, the complete machine noise of kitchen ventilator also reduces about 2dB left and right simultaneously.
Preferably, as a kind of embodiment, referring to Fig. 2, the edge line of the described snail tongue in the present embodiment comprises the lower limb line 420 near the top edge line 410 of described header board 100 and close described base plate 200, described top edge line 410 comprises the first arc section AB and the first straightway BC, described lower limb line 420 comprises the second arc section ab and the second straightway bc, and the radius R 1 of wherein said the first arc section AB and the radius R of described the second arc section ab 2 equate.General, the edge line of snail tongue 400 comprise the top edge line 410 crossing with header board 100 and with the crossing radius R 1 of lower limb line 420, the first arc section AB of base plate 300 and the radius R 2 of the second arc section ab can identical can be not identical yet.In the present embodiment, the radius R 2 of the radius R 1 of the first snail tongue fillet 410 and the second snail tongue fillet 420 equates, the gap between snail tongue and side panel is unanimous between the higher and lower levels like this, conveniently gas transfer is gone out.More easily process than becoming radius snail tongue in radius snail tongue, and compare, wait radius snail tongue room more even, can reduce noise.
Preferably apply as one, the present invention also provides a kind of centrifugal blower volute, and it comprises impeller, also comprises the spiral case described in above-mentioned any embodiment; Described impeller is arranged in the hollow cavity of described spiral case.
Preferably, the axis of described impeller and the center line of described hollow cavity overlap.
Preferably apply as one, the present invention also provides a kind of range hood, comprises the centrifugal blower volute described in above-described embodiment.
The above embodiment has only expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claim.
Claims (10)
1. a spiral case, comprise header board, side panel, base plate and snail tongue, on header board, be provided with intake grill, header board is connected with side panel respectively with base plate, and the edge of described side panel is log spiral, described side panel forms a hollow cavity, it is characterized in that, the edge line of described snail tongue comprises arc section and straightway, and described arc section and described straightway seamlessly transit, described arc section is connected with described side panel, and the elongation line of the log spiral of described side panel and described arc section tangent.
2. spiral case according to claim 1, is characterized in that, the arc section of described snail tongue is outstanding to the direction of the center line near described hollow cavity.
3. spiral case according to claim 2, is characterized in that, the distance between the straightway of described snail tongue and the outer wall of described side panel increases gradually along the bearing of trend of described straightway.
4. according to the spiral case described in claims 1 to 3 any one, it is characterized in that, at an angle between the axis of described snail tongue and the center line of described hollow cavity.
5. spiral case according to claim 4, is characterized in that, the angle between the axis of described snail tongue and the center line of described hollow cavity is 10 degree to 30 degree.
6. spiral case according to claim 4, it is characterized in that, the edge line of described snail tongue comprises the lower limb line near the top edge line of header board and close base plate, described top edge line comprises the first arc section AB and the first straightway BC, described lower limb line comprises the second arc section ab and the second straightway bc, and the radius of the radius of wherein said the first arc section AB and described the second arc section ab equates.
7. spiral case according to claim 4, is characterized in that, the center line of the relatively described hollow cavity of the axis of described snail tongue slopes inwardly.
8. a centrifugal blower volute, comprises impeller, it is characterized in that, also comprises the spiral case described in claim 1 to 6 any one; Described impeller is arranged in the hollow cavity of described spiral case.
9. centrifugal blower volute according to claim 8, is characterized in that, the axis of described impeller overlaps with the center line of described hollow cavity.
10. a range hood, is characterized in that, comprises the centrifugal blower volute described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410201183.3A CN104005996A (en) | 2014-05-13 | 2014-05-13 | Volute, centrifugal fan volute and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410201183.3A CN104005996A (en) | 2014-05-13 | 2014-05-13 | Volute, centrifugal fan volute and range hood |
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| CN104005996A true CN104005996A (en) | 2014-08-27 |
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| CN201410201183.3A Pending CN104005996A (en) | 2014-05-13 | 2014-05-13 | Volute, centrifugal fan volute and range hood |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246583A (en) * | 2016-08-19 | 2016-12-21 | 宁波方太厨具有限公司 | A kind of centrifugal blower and flow control methods thereof |
| CN108005956A (en) * | 2017-12-30 | 2018-05-08 | 豫新汽车空调股份有限公司 | A kind of volute structure used for automobile air conditioning |
| CN109595186A (en) * | 2018-12-07 | 2019-04-09 | 佛山市南海九洲普惠风机有限公司 | A kind of air-foil fan |
| CN109681469A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | Centrifugal blower volute structure |
| CN111197584A (en) * | 2018-11-20 | 2020-05-26 | 珠海格力电器股份有限公司 | Centrifugal fan, air duct system and air conditioner |
| CN112283806A (en) * | 2020-10-09 | 2021-01-29 | 海信（广东）空调有限公司 | Air conditioner |
| CN112664479A (en) * | 2020-10-20 | 2021-04-16 | 宁波方太厨具有限公司 | Fume exhaust fan |
| WO2022088222A1 (en) * | 2020-11-02 | 2022-05-05 | 宁波方太厨具有限公司 | Parallel-connected double-fan system, and range hood applying same |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106246583A (en) * | 2016-08-19 | 2016-12-21 | 宁波方太厨具有限公司 | A kind of centrifugal blower and flow control methods thereof |
| CN109681469A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | Centrifugal blower volute structure |
| CN109681469B (en) * | 2017-10-18 | 2023-11-17 | 宁波方太厨具有限公司 | Volute structure of centrifugal fan |
| CN108005956A (en) * | 2017-12-30 | 2018-05-08 | 豫新汽车空调股份有限公司 | A kind of volute structure used for automobile air conditioning |
| CN108005956B (en) * | 2017-12-30 | 2024-06-07 | 豫新汽车热管理科技有限公司 | Volute structure for automobile air conditioner |
| CN111197584A (en) * | 2018-11-20 | 2020-05-26 | 珠海格力电器股份有限公司 | Centrifugal fan, air duct system and air conditioner |
| EP3855023B1 (en) * | 2018-11-20 | 2023-11-29 | Gree Electric Appliances, Inc. of Zhuhai | Centrifugal fan, air duct system, and air conditioner |
| CN109595186B (en) * | 2018-12-07 | 2023-09-19 | 佛山市南海九洲普惠风机有限公司 | High-efficiency fan |
| CN109595186A (en) * | 2018-12-07 | 2019-04-09 | 佛山市南海九洲普惠风机有限公司 | A kind of air-foil fan |
| CN112283806A (en) * | 2020-10-09 | 2021-01-29 | 海信（广东）空调有限公司 | Air conditioner |
| CN112664479A (en) * | 2020-10-20 | 2021-04-16 | 宁波方太厨具有限公司 | Fume exhaust fan |
| US20230151820A1 (en) * | 2020-10-20 | 2023-05-18 | Ningbo Fotile Kitchen Ware Co., Ltd. | Range hood |
| US11835060B2 (en) | 2020-10-20 | 2023-12-05 | Ningbo Fotile Kitchen Ware Co., Ltd. | Range hood |
| WO2022082847A1 (en) * | 2020-10-20 | 2022-04-28 | 宁波方太厨具有限公司 | Range hood |
| WO2022088222A1 (en) * | 2020-11-02 | 2022-05-05 | 宁波方太厨具有限公司 | Parallel-connected double-fan system, and range hood applying same |
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